1 UI - 14713 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn S AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AD - Univ Buenos Aires, RA-1053 Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, F-38041 Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 05, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, F-91191 Gif Sur Yvette, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsInst Phys Nucl, Krakow, PolandMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster LA1 4YW, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USANYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Buenos Aires, RA-1053 Buenos Aires, DF, Argentina TI - Cross section for b-jet production in (p)over-barp collisions at root s=1.8 TeV AB - Bottom-quark production in (p) over barp collisions at roots = 1.8 TeV is studied with 5 pb(-1) of data collected in 1995 by the DO detector at the Fermilab Tevatron Collider The differential production cross section for b jets in the central rapidity region (\y(b)\ < 1) as a function of jet transverse energy is extracted from a muon-tagged jet sample. Within experimental and theoretical uncertainties, DO results are found to be higher than, but compatible with, next-to-leading-order QCD predictions MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 44 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000165800000014 L2 - HEAVY QUARK PRODUCTION; P(P)OVER-BAR COLLISIONS; HADRONIC COLLISIONS; E+E ANNIHILATION; QCD SO - Physical Review Letters 2000 ;85(24):5068-5073 2 UI - 14912 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov V AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AU - Patwa A AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Search for new physics in e mu X data at DO using SLEUTH: A quasi-model-independent search strategy for new physics AB - We present a quasi-model-independent search for the physics responsible for electroweak symmetry breaking. We define final states to be studied, and construct a rule that identifies a set of relevant variables for any particular final state. A new algorithm ("SLEUTH") searches for regions of excess in those variables and quantifies the significance of any detected excess. After demonstrating the sensitivity of the method, we apply it to the semi-inclusive channel e muX collected in 108 pb(-1) of p(p) over bar collisions at roots=1.8 TeV at the DO experiment during 1992-1996 at the Fermilab Tevatron. We find no evidence of new high p(T) physics in this sample MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000165111400008 L2 - DYNAMICAL SYMMETRY BREAKING; PRODUCTION CROSS-SECTION; TOP-QUARK SEARCH; P(P)OVER-BAR COLLISIONS; SUPERSYMMETRY; FERMILAB; NEUTRALINOS; CHARGINOS; ENERGY; DECAYS SO - Physical Review D 2000 ;6209(9): 3 UI - 14913 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adam I AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Belyaev A AU - Beri SB AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Bloom P AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Boswell C AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Cooper WE AU - Coppage D AU - Cretsinger C AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Forden GE AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Geld TL AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Hernandez-Montoya R AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Hu T AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Madden R AU - Magana-Mendoza L AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nang F AU - Narain M AU - Narasimham VS AU - Narayanan A AU - Neal HA AU - Negret JP AU - Nemethy P AU - Norman D AU - Oesch L AU - Oguri V AU - Oshima N AU - Owen D AU - Padley P AU - Para A AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janiero, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaKyungsung Univ, Pusan 608736, South KoreaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAAbbott, B, NYU, New York, NY 10003, USA TI - Measurement of the W boson mass using large rapidity electrons AB - \We present a measurement of the W boson mass using data collected by the DO experiment at the Fermilab Tevatron during 1994-1995. We identify W bosons by their decays to ev final states where the electron is detected in a forward calorimeter. We extract the W boson mass M-W by fitting the transverse mass and transverse electron and neutrino momentum spectra from a sample of 11 089 W-->e nu decay candidates. We use a sample of 1687 dielectron events, mostly due to Z-->ee decays, to constrain our model of the detector response. Using the forward calorimeter data, we measure M-w=80.691+/-0.227 GeV. Combining the forward calorimeter measurements with our previously published central calorimeter results, we obtain M-W= 80.482 +/-0.091 GeV MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000165111400010 L2 - TOP-QUARK MASS; CTEQ PARTON DISTRIBUTIONS; QED RADIATIVE-CORRECTIONS; CERN PBARP COLLIDER; P(P)OVER-BAR COLLISIONS; TRANSVERSE-MOMENTUM; FERMILAB-TEVATRON; STANDARD MODEL; D0 DETECTOR; NUCLEON SEA SO - Physical Review D 2000 ;6209(9): 4 UI - 15069 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AU - Patwa A AU - Pawlik B AU - Perkins J AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Phys Nucl, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47408, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Search for R-parity violation in multilepton final states in p(p)over-bar collisions at root s=1.8 TeV AB - The result of a search for gaugino pair production with a trilepton signature is reinterpreted in the framework of minimal supergravity (MSUGRA) with R-parity violation via leptonic lambda Yukawa couplings. The search used 95 pb(-1) of p (p) over bar collisions at root s = 1.8 TeV recorded by the D empty set detector at the Fermilab Tevatron. A large domain of the MSUGRA parameter space is excluded for lambda(121), lambda(122)greater than or equal to 10(-4) MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000089749400005 L2 - GRAND UNIFICATION; TOP-QUARK; SUPERSYMMETRY; SUPERGRAVITY; MASS SO - Physical Review D 2000 ;6207(7): 5 UI - 15301 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AU - Patwa A AU - Pawlik B AU - Perkins J AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, F-91190 Gif Sur Yvette, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USANYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - The b(b)over-bar production cross section and angular correlations in p(p)over-bar collisions at root s = 1.8 TeV AB - We present measurements of the b (b) over bar production cross section and angular correlations using the D phi detector at the Fermilab Tevatron p (p) over bar Collider operating at root s = 1.8 TeV. The b quark production cross section for /y(b)/ < 1.0 and P-T(b) > 6 GeV/c is extracted from the single muon and dimuon data samples. The results agree in shape with me next-to-leading order QCD calculation of heavy flavor production but are greater than the central values of these predictions. The angular correlations between b and (b) over bar quarks, measured from the azimuthal opening angle between their decay muons, also agree in shape with the next-to-leading order QCD prediction. (C) 2000 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 62 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000089046600007 L2 - ROOT-S=1.8 TEV; QUARK PRODUCTION; COLLIDER SO - Physics Letters B 2000 ;487(3-4):264-272 6 UI - 15330 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Cheliulaev SV AU - Chen LP AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Gonchalrov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritski AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceCtr Phys Particules Marseille, CNRS, IN2P3, Marseille, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Limits on anomalous WW gamma and WWZ couplings from WW/WZ -> evjj production AB - Limits on anomalous WW gamma and WWZ couplings are presented from a study of WW/WZ-->evjj events produced in p (p) over bar collisions at root s=1.8 TeV. Results from the analysis of data collected using the DO detector during the 1993-1995 Tevatron collider run at Fermilab are combined with those of an earlier study from the 1992-1993 run. A fit to the transverse momentum spectrum of the W boson yields direct limits on anomalous WW gamma and WWZ couplings. With the assumption that the WW gamma and WWZ couplings are equal, we obtain -0.34 < lambda < 0.36 (with Delta kappa = 0) and -0.43 < Delta kappa < 0.59 (with lambda = 0) at the 95% confidence level for a form-factor scale Lambda = 2.0 TeV MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000089022500009 L2 - GAUGE-BOSON COUPLINGS; ALPHA-S CALCULATION; ROOT-S=1.8 TEV; P(P)OVER-BAR COLLISIONS; FERMILAB-TEVATRON; PAIR PRODUCTION; WZ PRODUCTION; W+W PRODUCTION; D0 DETECTOR; COLLIDER SO - Physical Review D 2000 ;6205(5): 7 UI - 15544 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelman R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AU - Patwa A AU - Pawlik B AU - Perkins J AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, Inst Sci Nucl, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USANYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Limits on quark compositeness from high energy jets in (p)over-bar-p collisions at 1.8 TeV AB - Events in (p) over bar p collisions at root s = 1.8 TeV with total transverse energy exceeding 500 GeV are used to set limits on quark substructure. The data are consistent with next-to-leading order QCD calculations. We set a lower limit of 2.0 TeV at 95% confidence on the energy scale Lambda(LL) for compositeness in quarks. assuming a model with a left-left isoscalar contact interaction term. The limits on Lambda(LL) are found to be insensitive to the sign of the interference term in the Lagrangian MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088516300001 L2 - DIJET ANGULAR-DISTRIBUTIONS; CROSS-SECTION; PARTON DISTRIBUTIONS; GLOBAL ANALYSIS; ROOT-S=1.8TEV; DETECTOR; PHYSICS; SEARCH SO - Physical Review D 2000 ;6203(3): 8 UI - 15659 AU - Abbott B AU - Abramov MAV AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Bueschre V AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Ri de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 06, LPHNE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Spin correlation in t(t)over-bar production from p(p)over-bar collisions at root s=1.8 TeV AB - The D0 collaboration has performed a study of spin correlation in t (t) over tilde production for the process t (t) over bar --> bW(+)(b) over bar W-, where the W bosons decay to e nu or mu nu. A sample of six events was collected during an exposure of the DO detector to an integrated luminosity of approximately 125 pb(-1) of root s = 1.8 TeV p (p) over bar collisions. The standard model (SM) predicts that the short lifetime of the top quark ensures the transmission of any spin information at production to the t (t) over bar decay products. The degree of spin correlation is characterized by a correlation coefficient kappa. We find that kappa > -0.25 at the 68% confidence level. in agreement with the SM prediction of kappa = 0.88 MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000088048700008 L2 - TOP-QUARK PAIR; PRODUCTION CROSS-SECTION; ART. NO. 052001; COLLIDER DETECTOR; E(+)E(-) COLLIDERS; HADRON COLLIDERS; DILEPTON EVENTS; DECAY; MASS; FERMILAB SO - Physical Review Letters 2000 ;85(2):256-261 9 UI - 15807 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassier U AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad S AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li H AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AD - NYU, New York, NY 10003, USAColumbia Univ, New York, NY 10027, USAUniv Nebraska, Lincoln, NE 68588, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Michigan, Ann Arbor, MI 48109, USANortheastern Univ, Boston, MA 02115, USABoston Univ, Boston, MA 02215, USAUniv Maryland, College Pk, MD 20742, USALouisiana Tech Univ, Ruston, LA 71272, USAKansas State Univ, Manhattan, KS 66506, USAUniv Kansas, Lawrence, KS 66045, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAPurdue Univ, W Lafayette, IN 47907, USAUniv Notre Dame, Notre Dame, IN 46556, USAIndiana Univ, Bloomington, IN 47405, USANorthwestern Univ, Evanston, IL 60208, USANo Illinois Univ, De Kalb, IL 60115, USAUniv Illinois, Chicago, IL 60607, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Hawaii, Honolulu, HI 96822, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Calif Riverside, Riverside, CA 92521, USAUniv Calif Irvine, Irvine, CA 92697, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Arizona, Tucson, AZ 85721, USAUniv Lancaster, Lancaster, EnglandInst High Energy Phys, Protvino, RussiaInst Nucl Phys, Krakow, PolandCINVESTAV, Mexico City 14000, DF, MexicoSeoul Natl Univ, Seoul, South KoreaTata Inst Fundamental Res, Mumbai, IndiaUniv Delhi, Delhi 110007, IndiaPanjab Univ, Chandigarh 160014, IndiaMoscow State Univ, Moscow, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Paris 06, CNRS, LPHNE, IN2P3, Paris, FranceUniv Paris 07, CNRS, LPHNE, IN2P3, Paris, FranceUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv San Francisco, Quito, EcuadorUniv Los Andes, Bogota, ColombiaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Buenos Aires, Buenos Aires, DF, ArgentinaUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Measurement of the W ->tau nu production cross section in p(p)over-bar collisions at root s=1.8 TeV AB - of data collected with the DO detector during 1993-1995. We find that a(p (p) over bar --> W + X)B(W --> tau nu) = 2.22 +/- 0.09 (stat) +/- 0.10 (syst) +/- 0.10 (lum) nb. Lepton universality predicts that the ratio of the tau and electron electroweak charged current couplings to the W boson, g(T)(W)/g(e)(W), be unity. We find g(T)(W)/g(e)(W) = 0.980 +/- 0.031, in agreement with lepton universality MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000087653300007 L2 - E(+)E(-) INTERACTIONS; BRANCHING FRACTIONS; PAIR PRODUCTION; COLLIDER; DECAY SO - Physical Review Letters 2000 ;84(25):5710-5715 10 UI - 15808 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AU - Patwa A AU - Pawlik B AD - NYU, New York, NY 10003, USAColumbia Univ, New York, NY 10027, USAUniv Nebraska, Lincoln, NE 68588, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Michigan, Ann Arbor, MI 48109, USANortheastern Univ, Boston, MA 02115, USABoston Univ, Boston, MA 02215, USAUniv Maryland, College Pk, MD 20742, USALouisiana Tech Univ, Ruston, LA 71272, USAKansas State Univ, Manhattan, KS 66506, USAUniv Kansas, Lawrence, KS 66045, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Notre Dame, Notre Dame, IN 46556, USAIndiana Univ, Bloomington, IN 47405, USANorthwestern Univ, Evanston, IL 60208, USANo Illinois Univ, De Kalb, IL 60115, USAUniv Illinois, Chicago, IL 60607, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Hawaii, Honolulu, HI 96822, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Calif Riverside, Riverside, CA 92521, USAUniv Calif Irvine, Irvine, CA 92697, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Arizona, Tucson, AZ 85721, USAUniv Lancaster, Lancaster, EnglandInst High Energy Phys, Protvino, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaInst Nucl Phys, Krakow, PolandCINVESTAV, Mexico City 14000, DF, MexicoSeoul Natl Univ, Seoul, South KoreaTata Inst Fundamental Res, Mumbai, IndiaUniv Delhi, Delhi 110007, IndiaPanjab Univ, Chandigarh 160014, IndiaCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv San Francisco, Quito, EcuadorUniv Los Andes, Bogota, ColombiaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Estado Rio Janeiro, Rio De Janeiro, BrazilCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Buenos Aires, Buenos Aires, DF, ArgentinaUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Probing Balitsky-Fadin-Kuraev-Lipatov dynamics in the dijet cross section at large rapidity intervals in p(p)over-bar collisions at root s=1800 and 630 GeV AB - Inclusive dijet production at large pseudorapidity intervals (Delta eta) between the two jets has been suggested as a regime for observing Balitsky-Fadin-Kuraev-Lipatov (BFKL) dynamics. We have measured the dijet cross section for large Delta eta in p (p) over bar collisions at root s = 1800 and 630 GeV using the D0 detector. The partonic cross section increases strongly with the size of Delta eta; The observed growth is even stronger than expected on the basis of BFKL resummation in the leading logarithmic approximation. The growth of the partonic cross section can be accommodated with an effective BFKL intercept of alpha(BFKL)(20 GeV) = 1.65 +/- 0.07 MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000087653300009 L2 - DEEP-INELASTIC SCATTERING; JET PRODUCTION; HERA; ENERGY; SINGULARITY; POMERON; MESON SO - Physical Review Letters 2000 ;84(25):5722-5727 11 UI - 15860 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adam I AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Belyaev A AU - Beri SB AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Bloom P AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Boswell C AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Cooper WE AU - Coppage D AU - Cretsinger C AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Forden GE AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Geld TL AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Hernandez-Montoya R AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Hu T AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Madden R AU - Magana-Mendoza L AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nang F AU - Narain M AU - Narasimham VS AU - Narayanan A AU - Neal HA AU - Negret JP AU - Nemethy P AU - Norman D AU - Oesch L AU - Oguri V AU - Oshima N AU - Owen D AU - Padley P AU - Para A AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaKyungsung Univ, Pusan 608736, South KoreaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAAbbott, B, NYU, 550 1St Ave, New York, NY 10003, USA TI - Small-angle muon and bottom-quark production in p(p)over-bar collisions at root s=1.8 TeV AB - This Letter describes a measurement of the muon cross section originating from b-quark decay in the forward rapidity range 2.4 < \y(mu)\ < 3.2 in p (p) over bar collisions at root s = 1.8 TeV. The data used in this analysis were collected by the DO experiment at the Fermilab Tevatron. We find that next-to-leading-order QCD calculations underestimate b-quark production by a factor of 4 in the forward rapidity region MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000087522200006 L2 - = 1.8 TEV; DIFFERENTIAL CROSS-SECTION; P(P)OVER-BAR COLLISIONS; HADRON-COLLISIONS; D0 DETECTOR; DISTRIBUTIONS SO - Physical Review Letters 2000 ;84(24):5478-5483 12 UI - 16258 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adam I AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Belyaev A AU - Beri SB AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Bloom P AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Boswell C AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chekulaev SV AU - Chen W AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Cooper WE AU - Coppage D AU - Cretsinger C AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Forden GE AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Geld TL AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Hernandez-Montoya R AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Hu T AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Jung CK AU - Kahn S AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Madden R AU - Magana-Mendoza L AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Murphy C AU - Nang F AU - Narain M AU - Narasimham VS AU - Narayanan A AU - Neal HA AU - Negret JP AU - Nemethy P AU - Norman D AU - Oesch L AU - Oguri V AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Park YM AU - Partridge R AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Gif Sur Yvette, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaKyungsung Univ, Pusan 608736, South KoreaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USANYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAAbbott, B, NYU, New York, NY 10003, USA TI - Extraction of the width of the W boson from measurements of sigma(p(p)over-bar -> W+X) x B(W -> e nu) and sigma(p(p)over-bar -> Z+X) x B(Z -> ee) and their ratio AB - We report on measurements on inclusive cross sections times branching fractions into electrons for W and Z bosons produced in p (p) over bar collisions at root s = 1.8 TeV. From an integrated luminosity of 84.5 pb(-1) recorded in 1994-1995 using the D empty set detector at the Fermilab Tevatron, we determine sigma(p (p) over bar--> W + X) x B(W-->e nu) = 2310 +/- 10(stat) +/- 50(syst) +/- 100(lum)pb and sigma(p (p) over bar-->Z + X) x B(Z-->ee)=221+/-3(stat)+/-4(syst)+/-10(lum)pb. From these, we derive sigma(p (p) over bar-->W + X) x B(N-->e nu)/sigma(p (p) over bar-->Z + X) x B(Z-->ee) = 10.43+/-0.15(stat) +/- 0.20(syst) +/- 0.10(NLO), B(W-->e nu) = 0.1044+/-0.0015(stat)+/-0.0020(syst)+/-0.0017(theory)+/-0.0010(NLO). and Gamma(w) = 2169 +/- 0.03 l(stat) +/- 0.042(syst) +/- 0.041(theory)+/- 0.022(NLO)GeV. We use the latter to set a 95% confidence level upper limit on the partial decay width of the W boson into nonstandard model final states, Gamma(W)(inv), of 0.213 GeV. Combining these results with those from the 1992-1993 data gives sigma(p (p) over bar-->W+X) x B(W-->e nu)/sigma(p (p) over bar-->Z+X) x B(Z-->ee) = 10.51+/-0.25, Gamma(W) = 2.152 +/- 0.066 GeV, and a 95% C.L. upper limit an Gamma(W)(inv) of 0.191 GeV. Using a sample with a luminosity of 505 nb(-1) taken at root s = 630 GeV, we measure sigma(p (p) over bar--> W+ X) x B(W --> e nu) = 658 +/- 67 pb MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000086065200009 L2 - CTEQ PARTON DISTRIBUTIONS; CERN PBARP COLLIDER; YAN K-FACTOR; ROOT-S=1.8 TEV; P(P)OVER-BAR COLLISIONS; GAMMA COUPLINGS; CROSS-SECTIONS; E(+)E(-) INTERACTIONS; TRANSVERSE-MOMENTUM; PAIR-PRODUCTION SO - Physical Review D 2000 ;6107(7): 13 UI - 16307 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugas SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HW AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Mattin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Partridge R AU - Parua N AU - Paterno M AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceCtr Phys Particules Marseille, CNRS, IN2P3, Marseille, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Isolated photon cross section in p(p)over-bar collisions at root s=1.8 TeV AB - We report a new measurement of the cross section for the production of isolated photons with transverse energies (E-T(gamma)) above 10 GeV and pseudorapidities \eta\ < 2.5 in p (p) over bar collisions at root s = 1.8 TeV. The results are based on a data sample of 107.6 pb(-1) recorded during 1992-1995 with the D0 detector at the Fermilab Tevatron collider. The background, predominantly from jets which fragment to neutral mesons, was estimated using the longitudinal shower shape of photon candidates in the calorimeter. The measured cross section is in good agreement with the next-to-leading order QCD calculation for E-T(gamma) greater than or similar to 36 GeV MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 32 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000086062000006 SO - Physical Review Letters 2000 ;84(13):2786-2791 14 UI - 16308 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adam I AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Belyaev A AU - Beri SB AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Bloom P AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Boswell C AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Cooper WE AU - Coppage D AU - Cretsinger C AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Forden GE AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Geld TL AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Hernandez-Montoya R AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen N AU - Hoftun JS AU - Hsieh F AU - Hu T AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffi-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Madden R AU - Magana-Mendoza L AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nang F AU - Narain M AU - Narasimham VS AU - Narayanan A AU - Neal HA AU - Negret JP AU - Nemethy P AU - Norman D AU - Oesch L AU - Oguri V AU - Oshima N AU - Owen D AU - Padley P AU - Para A AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaKyungsung Univ, Pusan 608736, South KoreaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster LA1 4YW, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAAbbott, B, NYU, New York, NY 10003, USA TI - Differential production cross section of Z bosons as a function of transverse momentum at root s=1.8 TeV AB - We present a measurement of the transverse momentum distribution of Z bosons produced in p (p) over bar collisions at root s = 1.8 TeV from data collected by the DO experiment at the Fermilab Tevatron Collider, We find good agreement between our results and current resummation calculations, and also use our data to extract nonperturbative parameters for a particular version of the resummation formalism. The resulting values are significantly more precise than obtained in previous determinations MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000086062000007 L2 - MONTE-CARLO; W-BOSON; COLLIDERS; QCD SO - Physical Review Letters 2000 ;84(13):2792-2797 15 UI - 16422 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NH AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier R AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Partridge R AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceCNRS, IN2P3, Ctr Phys Particules Marseillo, Marseille, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, 550 1St Ave, New York, NY 10003, USA TI - Search for second-generation leptoquark pairs in (p)over-barp collisions at root s=1.8 TeV AB - We have searched for second-generation leptoquark (LQ) pairs in the mu mu + jets channel using 94 +/- 5 pb(-1) of (p) over bar p collider data collected by the DO experiment at the Fermilab Tevatron during 1993-1996. No evidence for a signal is observed. These results are combined with those from the mu v + jets and vv + jets channels to obtain 95% confidence level (C.L.) upper limits on the LQ pair production cross section as a function of mass and beta, the branching fraction of a LQ decay into a charged lepton and a quark. Lower limits of 200(180) GeV/c(2) for beta = 1(1/2) are set at the 95% C.L. on the mass of scalar LQ. Mass limits are also set on vector leptoquarks as a function of beta MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085650100011 L2 - P(P)OVER-BAR COLLISIONS SO - Physical Review Letters 2000 ;84(10):2088-2093 16 UI - 16546 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adam I AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsey VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Belyaev A AU - Beri SB AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Bloom P AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Boswell C AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chekulaev SV AU - Chen W AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Cooper WE AU - Coppage D AU - Cretsinger C AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Forden GE AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Geld TL AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Hernandez-Montoya R AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Hu T AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Jung CK AU - Kahn S AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Madden R AU - Magana-Mendoza L AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Murphy C AU - Nang F AU - Narain M AU - Narasimham VS AU - Narayanan A AU - Neal HA AU - Negret JP AU - Nemethy P AU - Norman D AU - Oesch L AU - Oguri V AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Park YM AU - Partridge R AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaKyungsung Univ, Pusan 608736, South KoreaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAAbbott, B, NYU, New York, NY 10003, USA TI - Measurement of the inclusive differential cross section for Z bosons as a function of transverse momentum in (p) over-barp collisions at root s=1.8 TeV AB - We present a measurement of the differential cross section as a function of transverse momentum of the Z boson in collisions at root s = 1.8 TeV using data collected by the DO experiment at the Fermilab Tevatron Collider during 1994-1996. We find good agreement between our data and the next-to-next-to-next-leading-logarithmic resummation prediction and extract values of the non-perturbative parameters for the resummed prediction from a fit to the differential cross section MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000085079600007 L2 - = 1.8 TEV; W-BOSON; PBARP COLLISIONS; LEPTON PAIRS; MONTE-CARLO; MASS; DISTRIBUTIONS; COLLIDERS; ENERGY; QCD SO - Physical Review D 2000 ;6103(3): 17 UI - 16651 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adam I AU - Adams DL AU - Adams M AU - Ahn S AU - Akimov V AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Belyaev A AU - Beri SB AU - Bertram I AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Bross A AU - Buchholz D AU - Burtovoi VS AU - Butler JM AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Chen W AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cullen-Vidal D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Denisov D AU - Denisov SP AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Draper P AU - Ducros Y AU - Dudko LV AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein B AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard P AU - Gilmartin R AU - Ginther G AU - Gobbi B AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon P AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green DR AU - Green JA AU - Greenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Guglielmo G AU - Guida JA AU - Guida JM AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez A AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn HS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Hernandez-Montoya R AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hsieh F AU - Ito AS AU - Jerger SA AU - Jesik R AU - Joffe-Minor T AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Jun SY AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Koltick D AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Landry F AU - Landsberg G AU - Leflat A AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lu JG AU - Lucotte A AU - Lueking L AU - Maciel AKA AU - Madaras RJ AU - Magana-Mendoza L AU - Manankov V AU - Mani S AU - Mao HS AU - Markeloff R AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McKibben T AU - McKinley J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta H AU - Nang F AU - Narain P AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Norman D AU - Oesch L AU - Oguri V AU - Oshima N AU - Owen D AU - Padley P AU - Para A AU - Parashar N AU - Park YM AU - Partridge R AU - Parua N AU - Paterno M AU - Patwa A AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, IN2P3 CNRS, Inst Sci Nucl, Grenoble, FranceCtr Phys Particules Marseille, IN2P3 CNRS, Marseille, FranceCEA, DAPNIA Serv Phys Particules, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaKyungsung Univ, Pusan 608736, South KoreaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USANYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Measurement of the W boson mass using electrons at large rapidities AB - We report a measurement of the W boson mass based on an integrated luminosity of 82 pb(-1) from collisions at root s = 1.8 TeV recorded in 1994-1995 by the D0 detector at the Fermilab Tevatron. We identify W bosons by their decays to ev, where the electron is detected in the forward calorimeters. We extract the mass by fitting the transverse mass and the electron and neutrino transverse momentum spectra of 11 089 W boson candidates. We measure M-w = 80.691 +/- 0.227 GeV. By combining this measurement with our previously published central calorimeter results from data taken in 1992-1993 and 1994-1995, we obtain M-w = 80.482 +/- 0.091 GeV MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000084661500005 L2 - PARTON DISTRIBUTIONS; RADIATIVE-CORRECTIONS; FERMILAB-TEVATRON; GLOBAL ANALYSIS; D0 DETECTOR; COLLISIONS; COLLIDER; DECAY SO - Physical Review Letters 2000 ;84(2):222-227 18 UI - 15730 AU - Aboytes F AU - Sanchez F AU - Cabra AIM AU - Castro JEG AD - Comis Fed Elect, Ctr Nacl Control Energia, Unidad Ingn Avanzada, Mexico City, DF, MexicoUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, Programa Doctoral Ingn Elect, Monterrey, NL, MexicoInterconex Elect SA, Medellin, ColombiaAboytes, F, Comis Fed Elect, Ctr Nacl Control Energia, Unidad Ingn Avanzada, Mexico City, DF, Mexico TI - Dynamic stability analysis of the interconnected Colombia-Venezuela power system AB - This paper presents the operating problems of the interconnection between Colombia and Venezuela power systems through a single 230 kV transmission line. It describes the technical analysis carried out for the stabilization of a sustained power flow oscillation of 0.22 Hz. The analysis includes results of simulations and field recordings obtained in the system. Operating strategies adopted and the conclusions of the study are also summarized MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000087916000055 L2 - excitation control;interarea oscillations;modal analysis;power system stabilizers;weak power systems SO - Ieee Transactions on Power Systems 2000 ;15(1):376-381 19 UI - 16032 AU - Acevedo L AU - Martinez E AU - Castaneda P AU - Franzblau S AU - Timmermann BN AU - Linares E AU - Bye R AU - Mata R AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Farmacia, Mexico City 04510, DF, MexicoGWL Hansens Dis Ctr, Baton Rouge, LA, USAUniv Arizona, Coll Pharm, Dept Pharmacol & Toxicol, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoMata, R, Natl Autonomous Univ Mexico, Fac Quim, Dept Farmacia, Mexico City 04510, DF, Mexico TI - New phenylethanoids from Buddleja cordata subsp cordata AB - Bioassay-guided fractionation of a crude extract of the stem bark of Buddleja cordata subsp. cordata with significant antimycobacterial activity led to the isolation of a mixture composed by ten new long-chain esters of 2[4'-hydroxyphenyl]-ethanol (1-10), along with the lichen metabolites methyl beta-orcinolcarboxylate (11) and beta-orcinolcarboxylate (12). Extensive HPLC allowed the separation of the major components of the mixture, which were characterized by spectral means as 2[4'-hydroxyphenyl]-ethyl stearate (3), 2[4'-hydroxyphenyl]-ethyl behenate (6), and 2[4'-hydroxyphenyl]-ethyl lignocerate (8). The minor esters were identified as 2[4'-hydroxyphenyl]-ethyl palmitate (1), 2[4'-hydroxyphenyl]-ethyl heptadecanoate (2), 2[4'-hydroxyphenyl]-ethyl nonadecanoate (4), 2[4'-hydroxyphenyl]-ethyl arachidate (5), 2[4'-hydroxyphenyl]-ethyl tricosanoate (7), 2[4'-hydroxyphenyl]-ethyl pentacosanoate (9), and 2[4'-hydroxyphenyl]-ethyl hexacosanoate (10) by GC-MS analysis of the methyl esters derivatives of the fatty acids obtained by alkaline hydrolysis of the mixture. Compound 8 exhibited moderate antibacterial activity against Mycobacterium tuberculosis (MIC = 64 mu g/ml) MH - Mexico|Distrito Federal MH - USA PB - STUTTGART: GEORG THIEME VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0032-0943 UR - ISI:000086893900012 L2 - Buddleja cordata subsp cordata;Loganiaceae;phenylethanoids;Mycobacterium tuberculosis;antimycobacterial activity;methyl beta-orcinolcarboxylate;beta-orcinolcarboxylate;LINARIN SO - Planta Medica 2000 ;66(3):257-261 20 UI - 15227 AU - Aceves SM AU - Martinez-Frias J AU - Garcia-Villazana O AD - Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94551, USACtr Ingn & Desarrollo Ind, Queretaro, Qro, MexicoUniv Guanajuato, FIMEE, Salamanca, Gto, MexicoAceves, SM, Univ Calif Lawrence Livermore Natl Lab, 7000 East Ave,L-641, Livermore, CA 94551 USA TI - Analytical and experimental evaluation of insulated pressure vessels for cryogenic hydrogen storage AB - Insulated pressure vessels are cryogenic-capable pressure vessels that can be fueled with liquid hydrogen (LH2) or ambient-temperature compressed hydrogen (CH2). These vessels offer the advantages of LH2 tanks (low weight and volume), with reduced disadvantages (fuel flexibility, lower energy requirement for hydrogen liquefaction and reduced evaporative losses). The work described here is directed to verify that commercially available pressure vessels can be safely used to store LH2. The use of commercially available pressure vessels significantly reduces the cost and complexity of the insulated pressure vessel development effort. This paper describes a series of tests that have been done with aluminum-lined, fiber-wrapped vessels to evaluate the damage caused by low temperature operation. All analyses and experiments to date indicate that no significant damage has resulted. Required future tests are described, which will prove that no technical barriers exist to the safe use of aluminum-fiber vessels at cryogenic temperatures. Published by Elsevier Science Ltd on behalf of the International Association for Hydrogen Energy MH - USA MH - Mexico|Guanajuato MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000089397900008 SO - International Journal of Hydrogen Energy 2000 ;25(11):1075-1085 21 UI - 15729 AU - Acha E AU - mbriz-Perez H AU - Fuerte-Esquivel CR AD - Univ Glasgow, Virtual FACTS Res Lab, Dept Elect & Elect Engn, Glasgow G12 8QQ, Lanark, ScotlandInst Technol, Dept Ingn Elect & Elect, Virtual FACTS Res Lab, Morelia, Michoacan, MexicoAcha, E, Univ Glasgow, Virtual FACTS Res Lab, Dept Elect & Elect Engn, Glasgow G12 8QQ, Lanark, Scotland TI - Advanced transformer control modeling in an optimal power flow using Newton's method AB - This paper reports on advanced transformer modeling facilities suitable for large-scale optimal power flow studies. The new transformer models are developed from first principles and incorporated into an existing Newton-based optimal power flow computer program for highly robust iterative solutions. A three-winding transformer model with tap ratios in all three windings is shown to be a general case for existing two-winding transformer models and the classic load tap-changing and phase-shifting transformer models. The newly developed transformer models add a great deal to software flexibility and are amenable to more realistic electric energy studies. This is partly due to the transformer models being fitted with complex tap changers in each winding and a nonlinear representation of the magnetizing branch. The three-winding transformer model interfaces easily with reactive power plant models, e.g., static var compensators MH - Mexico|Michoacan MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000087916000043 L2 - FACTS;load tap-changing transformers;Newton's method;optimal power flows;phase-shifting transformers;ALGORITHM; NETWORKS SO - Ieee Transactions on Power Systems 2000 ;15(1):290-298 22 UI - 14675 AU - Acosta CR AU - Acosta M AU - Sosa V AU - Ares O AD - IPN, CINVESTAV, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoUH, Fac Fis, IMRE, Lab Superconduct, La Habana 10400, CubaAcosta, CR, IPN, CINVESTAV, Unidad Merida, Dept Fis Aplicada, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Comparative analysis of the determination of J(c) of YBCO films at different temperatures and magnetic fields by means of the shielding technique AB - Imaginary susceptibility of YBCO films was studied between 32 and 83 K as a function of magnetic field (0 to 350 Oe). No maximum in the curve of susceptibility was observed at low temperatures ((i)50 K), this made that this criterion for the determination of the critical current density could not be applied. The same fact ocurred in the curves of the third harmonic against magnetic field. Therefore, to determine J(c) we proposed the criterion of taking the maximum of the third/first harmonic ratio. It was observed that the J(c) values determined with the three criteria tend to coincide as they approach to the critical temperature MH - Cuba MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855900252 L2 - AC SUSCEPTIBILITY MEASUREMENTS; SUPERCONDUCTORS SO - Physica C 2000 ;341():2051-2052 23 UI - 16437 AU - Acosta CR AU - Acosta M AU - Sosa V AU - Ares O AD - IPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, Merida 97310, Yucatan, MexicoUH Fac Fis, Lab Superconduct IMRE, La Habana 10400, CubaAcosta, CR, IPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Screening technique measurement of ac imaginary susceptibility and critical current density of YBa2Cu3O7-delta films AB - The screening technique was used to study systematically the ac susceptibility of superconducting YBa2Cu3O7-delta thin films in the temperature range of 32-83 K. We used the Fourier transform of the pick-up signal, coming from the secondary coil, to estimate the critical current density. From the experimental data we observed regularities in the imaginary part of ac susceptibility, and confirmed that the flux creep mechanism is dominant. (C) 2000 American Institute of Physics. [S0021-8979(00)03105-4] MH - Cuba MH - Mexico|Yucatan PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000085529500064 L2 - HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-FIELD; THIN-FILMS; DISKS; TC SO - Journal of Applied Physics 2000 ;87(5):2460-2463 24 UI - 14955 AU - Acosta DR AU - Estrada W AU - Castanedo R AU - Maldonado A AU - Valenzuela MA AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUNI, Fac Ciencias, Lima, PeruCINVESTAV, IPN, Mat Lab, Queretaro, MexicoCINVESTAV, IPN, Mexico City 07000, DF, MexicoESIQUIE, IPN, Lab Catalisis & Mat, Mexico City 07738, DF, MexicoAcosta, DR, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Structural and surface studies of tin oxide films doped with fluorine AB - Thin films of SnO2:F deposited by spray pyrolysis over glass substrate at 300 degreesC, were studied by scanning, conventional and high resolution electron microscopy together with atomic force microscopy. The surface topology and morphology changes detected for films deposited with various fluorine levels are related to the electrical behavior previously reported. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Peru PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000165067400033 L2 - thin films;SnO2;fluorine doping;electron microscopy;atomic force microscopy SO - Thin Solid Films 2000 ;375(1-2):147-150 25 UI - 16461 AU - Acosta LR AU - Evans WFJ AD - SIMA, Mexico City 06900, DF, MexicoTrent Univ, Atmospher Phys Lab, Environm Resource Studies, Peterborough, ON K9J 7B8, CanadaAcosta, LR, SIMA, Apto Post 71-70, Mexico City 06900, DF, Mexico TI - Design of the Mexico City UV monitoring network: UV-B measurements at ground level in the urban environment AB - Although there is concern for future stratospheric ozone depletion, several large urban populations are already being exposed to very high UV levels due to geographical factors. In Mexico City, ultraviolet radiation (UV) plays an important role in the generation of high levels of tropospheric ozone and other photochemical pollutants. The measurement of ultraviolet-B radiation in Mexico began in the spring 1993, as a pilot project for ultraviolet-B (UV-B) monitoring and as support for the first Hispanic public information program on the UV index through the Televisa (Mexican television network, which covers the Spanish speaking world). In 1996, based on our preliminary measurements, the Mexico City government commissioned the authors to design the Valley of Mexico UV-monitoring Network. The design of the network is presented. The preliminary measurements show that biologically active (UV-B) solar radiation can reach levels above 5 minimum erythemal dose (MED/hour) or 12 UV index units during spring and summer months. Annual UV measurements have shown seasonal variations of 40% between winter and summer months. Strong attenuation of UV-B radiation at ground level in the urban triosphere has been detected under polluted conditions. Measurements of the morphology of UV-B radiation have been taken at downtown and suburban monitoring stations, over diurnal, monthly and yearly periods. The network measurements show that the downtown UV-B levels are 20% lower than suburban levels on a seasonal basis, but differences can be greater than 40% on polluted days. The relationship between the Total Ozone Mapping Spectrometer (TOMS) total ozone column and tropospheric ozone concentrations in Mexico City is also discussed MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000085512800061 L2 - OZONE; ULTRAVIOLET SO - Journal of Geophysical Research-Atmospheres 2000 ;105(D4):5017-5026 26 UI - 14668 AU - Adhikari SK AU - Casas M AU - Puente A AU - Rigo A AU - Fortes M AU - Solis MA AU - de Llano M AU - Valladares AA AU - Rojo O AD - Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilUniv Illes Balears, Dept Fis, Palma de Mallorca 07071, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPESTIC, Secretaria Acad, Mexico City 04430, DF, MexicoCINVESTAV, IPN, Mexico City 04430, DF, MexicoAdhikari, SK, Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, Brazil TI - Cooper pair dispersion relation in two dimensions AB - The Cooper pair binding energy vs. center-of-mass-momentum dispersion relation for Bose-Einstein condensation studies of superconductivity is found in two dimensions for a renormalized attractive delta interaction. It crosses over smoothly from a linear to a quadratic form as coupling varies from weak to strong MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855500039 L2 - BOSE-EINSTEIN CONDENSATION; SUPERCONDUCTIVITY; MODEL SO - Physica C 2000 ;341():151-152 27 UI - 14670 AU - Adhikari SK AU - Casas M AU - Puente A AU - Rigo A AU - Fortes M AU - Solis MA AU - de Llano M AU - Valladares AA AU - Rojo O AD - Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilUniv Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPESTIC, Secretaria Acad, Mexico City 04430, DF, MexicoIPN, CINVESTAV, Mexico City 04430, DF, MexicoAdhikari, SK, Univ Estadual Paulista, Inst Fis Teor, Rua Pamplona 145, BR-01405900 Sao Paulo, Brazil TI - Superconductivity as a Bose-Einstein condensation? AB - Bose-Einstein condensation (BEC) in two dimensions (2D) (e.g., to describe the quasi-2D cuprates) is suggested as the possible mechanism widely believed to underlie superconductivity in general. A crucial role is played by nonzero center-of-mass momentum Cooper pairs (CPs) usually neglected in BCS theory. Also vital is the unique linear dispersion relation appropriate to weakly-coupled "bosonic" CPs moving in the Fermi sea-rather than in vacuum where the dispersion would be quadratic but only for very strong coupling, and for which BEC is known to be impossible in 2D MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855500074 L2 - ORGANIC SUPERCONDUCTORS; PENETRATION-DEPTH SO - Physica C 2000 ;341():233-236 28 UI - 15070 AU - Adhikari SK AU - Casas M AU - Puente A AU - Rigo A AU - Fortes M AU - Solis MA AU - de Llano M AU - Valladares AA AU - Rojo O AD - Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilUniv Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoSecretaria Acad, PESTIC, Mexico City 04430, DF, MexicoIPN, CINVESTAV, Mexico City 04430, DF, MexicoAdhikari, SK, Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, Brazil TI - Cooper pair dispersion relation for weak to strong coupling AB - Cooper pairing in two dimensions is analyzed with a set of renormalized equations to determine its binding energy for any fermion number density and all coupling assuming a,generic pairwise residual interfermion interaction. Also considered are Cooper pairs (CP's) with nonzero center-of-mass momentum (CMM) and their binding energy is expanded analytically in powers of the CMM up to quadratic terms. A Fermi-sea-dependent linear term in the CMM dominates the pair excitation energy in weak coupling (also called the BCS regime) while the more familiar quadratic term prevails in strong coupling (the Bose regime). The crossover, though strictly unrelated to BCS theory per se, is studied numerically as it is expected to play a central role in a model of superconductivity as a Bose-Einstein condensation of CPs where the transition temperature vanishes for all dimensionality d less than or equal to 2 for quadratic dispersion, but is nonzero for all d greater than or equal to 1 for linear dispersion MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000089733800030 L2 - BOSE CONDENSATION; BCS; SUPERCONDUCTIVITY; MODEL; RENORMALIZATION; CROSSOVER; WAVES; GAS SO - Physical Review B 2000 ;62(13):8671-8674 29 UI - 14521 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Bernardi G AU - Berndt T AU - Bertrand-Coremans G AU - Bizot JC AU - Borras K AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Ebert J AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferrarotto F AU - Ferron S AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haustein V AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hilgers M AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Hoprich W AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Kaufmann O AU - Kausch M AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Kutuev R AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Lebedev A AU - Leissner B AU - Lemaitre V AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobo G AU - Lobodzinska E AU - Lobodzinski B AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller D AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham, W Midlands, EnglandInteruniv Inst High Energies, ULB, VUB, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Mat, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Mediterranne, IN2P3, CNRS, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicIst Nazl Fis Nucl, Rome, ItalyUniv Roma 3, Dipartimento Fis, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Zeuthen, GermanyDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandBerg Univ Gesamthsch Wuppertal, Rechtzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Inclusive photoproduction of neutral pions in the photon hemisphere at HERA AB - The inclusive cross section for the photoproduction of neutral pious has been measured as a function of the transverse momentum, rapidity, and Feynman x of the pi (0) mesons at an average photon-proton centre-of-mass energy of 208 GeV and for photon virtualities below Q(2) = 0.01 GeV2. The pi (0) measurement extends the range covered by previous charged particle measurements at HERA by two units of rapidity in the photon direction down to a value of -5.5 in the gammap centre-of-mass frame. The pi (0) transverse momentum distribution is well described over the whole measured range by a power law ansatz, while an exponential fit falls below the data at transverse momentum values above 1.5 GeV/c. Good agreement with the predictions of the Monte Carlo models PYTHIA and PHOJET is found. In the context of the PYTHIA model the data are inconsistent with large intrinsic transverse momentum values in the photon MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000166416700006 L2 - LARGE TRANSVERSE-MOMENTUM; LIQUID ARGON CALORIMETER; LEAD/SCINTILLATING-FIBER CALORIMETER; HIGH-ENERGY PHOTOPRODUCTION; PARTICLE CROSS-SECTIONS; LUND MONTE-CARLO; PARTON FRAGMENTATION; PP INTERACTIONS; H1 DETECTOR; PI-0 MESONS SO - European Physical Journal C 2000 ;18(2):293-302 30 UI - 14739 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Bernardi G AU - Berndt T AU - Bizot JC AU - Borras K AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Hoprich W AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Kaufmann O AU - Kausch M AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Kutuev R AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobodzinska E AU - Lobodzinski B AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Royon C AU - Rusakov S AU - Rybicki K AU - Sankey DPC AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, Wilrijk, BelgiumFree Univ Brussels, Interuniv Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DSM, DAPNIA, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma 3, Ist Nazl Fis Nucl, Rome, ItalyUniv Roma 3, Dipartimento Fis, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyAp CINVESTAV, Dept Fis, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - A search for excited fermions at HERA AB - A search for excited fermions f* of the first generation in e(+)p scattering at the collider HERA is presented using H1 data with an integrated luminosity of 37 pb(-1). All electroweak decays of excited fermions, f* --> f gamma fW, fZ are considered and all possible final states resulting from the Z or W hadronic decays or decays into leptons of the first two generations are taken into account. No evidence for f* production is found. Mass dependent exclusion limits on cross-sections and on the ratio of coupling constants to the compositeness scale are derived MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 18 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000165688600002 L2 - LIQUID ARGON CALORIMETER; DYNAMICAL SYMMETRY BREAKING; ENERGY EP COLLISIONS; LEPTON PRODUCTION; H1; SUBSTRUCTURE; SCATTERING; COLLIDERS; QUARKS; CALIBRATION SO - European Physical Journal C 2000 ;17(4):567-581 31 UI - 15735 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Bernardi G AU - Berndt T AU - Bertrand-Coremans G AU - Biddulph P AU - Bizot JC AU - Borras K AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burke S AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Chabert E AU - Charlet M AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - Delcourt B AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Ebert J AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Fahr AB AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Feltesse J AU - Ferencei J AU - Ferrarotto F AU - Ferron S AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Gorelov I AU - Grab C AU - Grassler H AU - Greenshaw T AU - Griffiths RK AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haustein V AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hilgers M AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jonsson L AU - Johnson DP AU - Jones M AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Kaufmann O AU - Kausch M AU - Keil F AU - Keller N AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lebedev A AU - Lehner F AU - Lemaitre V AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobo G AU - Lobodzinska E AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - McMahon TR AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller D AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Newman PR AU - Nguyen HK AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potashnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Rizvi E AU - Robmann P AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Inst Hochenergiephys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Aix Marseille 2, CNRS, IN2P3, CPPM, F-13284 Marseille 07, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPHNE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Nucl Ctr, Prague, Czech RepublicIst Nazl Fis Nucl Roma 1, Rome, ItalyUniv Roma 3, Dipartimento Fis, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, SK-04154 Kosice, SlovakiaAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany TI - Investigation of power corrections to event shape variables measured in deep-inelastic scattering AB - Deep-inelastic ep scattering data, taken with the H1 detector at HERA, are used to study the event shape variables thrust, jet broadening, jet mass, C parameter and two kinds of differential two-jet rate. The data cover a large range of the four-momentum transfer Q, which is considered to be the relevant energy scale, between 7GeV and 100 GeV. The Q dependences of the mean values are compared with second order calculations of perturbative QCD applying power law corrections proportional to 1/Q(p) to account for hadronization effects. The concept of power corrections is investigated by fitting simultaneously a non-perturbative parameter <(alpha)over bar>(p-1) and the strong coupling constant a, MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 22 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000087883300005 L2 - MONTE-CARLO GENERATOR; PARTON DISTRIBUTIONS; JET FRAGMENTATION; E+E ANNIHILATION; PETRA ENERGIES; CROSS-SECTIONS; QCD; PHYSICS; HERA; DEPENDENCE SO - European Physical Journal C 2000 ;14(2):255-269 32 UI - 15753 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Bernardi G AU - Berndt T AU - Bizot JC AU - Borras K AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Hoprich W AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Kaufmann O AU - Kausch M AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Kutuev R AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobodzinska E AU - Lobodzinski B AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Royon C AU - Rusakov S AU - Rybicki K AU - Sankey DPC AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB, VUB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna 141980, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma 3, INFN Roma 1, Rome, ItalyUniv Roma 3, Dipartimento Fis, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandHumboldt Univ, Inst Phys, Berlin, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyCERN, Geneva, SwitzerlandUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanySafarik Univ, Kosice, SlovakiaAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of elastic electroproduction of phi mesons at HERA AB - The elastic electroproduction of phi mesons is studied at HERA with the H1 detector for photon virtualities 1 < Q(2) < 15 GeV2 and hadronic centre of mass energies 40 < W < 130 GeV. The Q(2) and t dependences of the cross section are extracted (t being the square of the four-momentum transfer to the target proton). When plotted as function of (Q(2) + M-v(2)) and scaled by the appropriate SU(5) quark charge factor, the phi meson cross section agrees within errors with the cross sections of the vector mesons V = rho, omega and J/psi. A detailed analysis is performed of the phi meson polarisation state and the ratio of the production cross sections for longitudinally and transversely polarised phi mesons is determined. A small but significant violation of s-channel helicity conservation (SCKC) is observed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 37 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000087791700003 L2 - DEEP-INELASTIC SCATTERING; VECTOR-MESONS; DIFFRACTIVE ELECTROPRODUCTION; PHOTOPRODUCTION; RHO(0) SO - Physics Letters B 2000 ;483(4):360-372 33 UI - 16015 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Behrend HJ AU - Beier C AU - Belousov A AU - Berger C AU - Bernardi G AU - Berndt T AU - Bertrand-Coremans G AU - Biddulph P AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burke S AU - Burrage A AU - Buschhorn G AU - Calvet D AU - Campbell AJ AU - Carli T AU - Chabert E AU - Charlet M AU - Clarke D AU - Clerbaux B AU - Contreras JG AU - Cormack C AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - De Roeck A AU - De Wolf EA AU - Delcourt B AU - Demirchyan R AU - Diaconu C AU - Dirkmann M AU - Dixon P AU - Dodonov V AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Ebert J AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Elsen E AU - Enzenberger M AU - Erdmann M AU - Fahr AB AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Feltesse J AU - Ferencei J AU - Ferrarotto F AU - Ferron S AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Gaede F AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Gorelov I AU - Grab C AU - Grassler H AU - Greenshaw T AU - Griffiths RK AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Hampel M AU - Haustein V AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hewitt K AU - Hilgers M AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Jonsson L AU - Johnson DP AU - Jones M AU - Jung H AU - Kastli HK AU - Kander M AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Kaufmann O AU - Kausch M AU - Keil F AU - Keller N AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Kohne JH AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Kramerkamper T AU - Krasny MW AU - Krehbiel H AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuster H AU - Kuhlen M AU - Kurca T AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Langenegger U AU - Lebedev A AU - Lehner F AU - Lemaitre V AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobo G AU - Lobodzinska E AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - McMahon TR AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller D AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Newman PR AU - Nguyen HK AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Niedzballa C AU - Niggli H AU - Nix O AU - Nowak G AU - Nunnemann T AU - Oberlack H AU - Olsson JE AU - Ozerov D AU - Palmen P AU - Panassik V AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Pawletta H AU - Perez E AU - Phillips JP AU - Pieuchot A AU - Pitzl D AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumFree Univ Brussels, Interuniv Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, Heidelberg, Vic, AustraliaUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Inst Hochenergiephys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Aix Marseille 2, CPPM, IN2P3, CNRS, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Nucl Ctr, Prague, Czech RepublicUniv Roma 3, Ist Nazl Fis Nucl, Rome, ItalyUniv Roma 3, Dipartimento Fis, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatau, MexicoUniv PJ Safarik, Kosice, SlovakiaAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of neutral and charged current cross-sections in positron-proton collisions at large momentum transfer AB - The inclusive single and double differential cross-sections for neutral and charged charged processes with four-momentum transfer squared Q(2) between 150 and 30 000 GeV2 and with Bjorken x between 0.0032 and 0.65 are measured in e(+)p collisions. The data were taken with the H1 detector at HERA between 1994 and 1997. and they correspond to an integrated luminosity of 35.6 pb(-1). Tho Q(2) evolution of the parton densities of the proton is tested, yielding no significant deviation from the prediction of perturbative QCD. The proton structure function Fz(x, Q(2)) is determined. All extraction of the u and d quark distributions at high x is presented. At high Q(2) electroweak effects of the heavy bosons Z(o) and W are observed and found to be consistent with Standard Model expectation MH - Australia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 98 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000087049900004 L2 - DEEP-INELASTIC-SCATTERING; LIQUID ARGON CALORIMETER; W-BOSON MASS; STRUCTURE-FUNCTION F-2(X,Q(2)); PARTON DISTRIBUTIONS; EP SCATTERING; KINEMATIC RECONSTRUCTION; RADIATIVE-CORRECTIONS; E(+)E(-) COLLISIONS; LEADING ORDER SO - European Physical Journal C 2000 ;13(4):609-639 34 UI - 16046 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Behrend HJ AU - Beier C AU - Belousov A AU - Berger C AU - Bernardi G AU - Berndt T AU - Bertrand-Coremans G AU - Biddulph P AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Buniatian A AU - Burke S AU - Burrage A AU - Buschhorn G AU - Calvet D AU - Campbell AJ AU - Carli T AU - Chabert E AU - Charlet M AU - Clarke D AU - Clerbaux B AU - Contreras JG AU - Cormack C AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - De Roeck A AU - De Wolf EA AU - Delcourt B AU - Demirchyan R AU - Diaconu C AU - Dirkmann M AU - Dixon P AU - Dlugosz W AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Ebert J AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Elsen E AU - Enzenberger M AU - Erdmann M AU - Fahr AB AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Feltesse J AU - Ferencei J AU - Ferrarotto F AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Gaede F AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Gorelov I AU - Grab C AU - Grassler H AU - Greenshaw T AU - Griffiths RK AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Hampel M AU - Haustein V AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herynek I AU - Hewitt K AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Jonsson L AU - Johnson DP AU - Jones M AU - Jung H AU - Kastli HK AU - Kander M AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnik O AU - Katzy J AU - Kaufmann O AU - Kausch M AU - Keller N AU - Kenyon IR AU - Kermiche S AU - Keuker C AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Kohne JH AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Kramerkamper T AU - Krasny MW AU - Krehbiel H AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuster H AU - Kuhlen M AU - Kurca T AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Langenegger U AU - Lebedev A AU - Lehner F AU - Lemaitre V AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobo G AU - Lobodzinska E AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - McMahon TR AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohr R AU - Mohrdieck S AU - Mondragon M AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller D AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Newman PR AU - Nguyen HK AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Niedzballa C AU - Niggli H AU - Nix O AU - Nowak G AU - Nunnemann T AU - Oberlack H AU - Olsson JE AU - Ozerov D AU - Palmen P AU - Panassik V AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Pawletta H AU - Perez E AU - Phillips JP AU - Pieuchot A AU - Pitzl D AU - Poschl R AU - Pope G AU - Povh B AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyDESY, Inst Hochenergiephys, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandHumboldt Univ, Inst Phys, Berlin, GermanyBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Calif Davis, Dept Phys, Davis, CA 95616, USAUniv Calif Davis, IIRPA, Davis, CA 95616, USAUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Inst Hochenergiephys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Aix Marseille 2, IN2P3, CNRS, CPPM, F-13284 Marseille 07, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Nucl Ctr, Prague, Czech RepublicUniv Roma 3, Dipartimento Fis, Rome, ItalyUniv Roma 3, INFN Roma 1, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Elastic electroproduction of rho mesons at HERA AB - The elastic electroproduction of rho mesons is studied at HERA with the H1 detector for a photon virtuality in the range 1 < Q(2) < 60 GeV2 and for a hadronic centre of mass energy in the range 30 < W < 140 GeV. The shape of the (pi pi) mass distribution in the rho resonance region is measured as a function of Q(2). The full set of rho spin density matrix elements is determined, and evidence is found for a helicity flip amplitude at the level of 8 +/- 3% of the non-flip amplitudes. Measurements are presented of the dependence of the cross section on Q(2), W and t (the four-momentum transfer squared to the proton). They suggest that, especially at large Q(2), the gamma*p cross section develops a stronger W dependence than that expected from the behaviour of elastic and total hadron-hadron cross sections MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 86 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000086888100001 L2 - DIFFRACTIVE PRODUCTION; VECTOR-MESONS; LARGE Q(2); PHOTOPRODUCTION; DISTRIBUTIONS; MUOPRODUCTION; CALORIMETER; SCATTERING; PHYSICS; QCD SO - European Physical Journal C 2000 ;13(3):371-396 35 UI - 16047 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel T AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Behrend HJ AU - Beier C AU - Belousov A AU - Berger C AU - Bernardi G AU - Berndt T AU - Bertrand-Coremans G AU - Biddulph P AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Buniatian A AU - Burke S AU - Burrage A AU - Buschhorn G AU - Calvet D AU - Campbell AJ AU - Carli T AU - Chabert E AU - Charlet M AU - Chyla J AU - Clarke D AU - Clerbaux B AU - Contreras JG AU - Cormack C AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - De Roeck A AU - De Wolf EA AU - Delcourt B AU - Demirchyan R AU - Diaconu C AU - Dirkmann M AU - Dixon P AU - Dlugosz W AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Ebert J AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Elsen E AU - Enzenberger M AU - Erdmann M AU - Fahr AB AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Feltesse J AU - Ferencei J AU - Ferrarotto F AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Gaede F AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Gorelov I AU - Grab C AU - Grassler H AU - Greenshaw T AU - Griffiths RK AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Hampel M AU - Haustein V AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herynek I AU - Hewitt K AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Jonsson L AU - Johnson DP AU - Jones M AU - Jung H AU - Kastli HK AU - Kander M AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnik O AU - Katzy J AU - Kaufmann O AU - Kausch M AU - Keller N AU - Kenyon IR AU - Kermiche S AU - Keuker C AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Kohne JH AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Kramerkamper T AU - Krasny MW AU - Krehbiel H AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuster H AU - Kuhlen M AU - Kurca T AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Langenegger U AU - Lebedev A AU - Lehner F AU - Lemaitre V AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobo G AU - Lobodzinska E AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - McMahon TR AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohr R AU - Mohrdieck S AU - Mondragon M AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller D AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Newman PR AU - Nguyen HK AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Niedzballa C AU - Niggli H AU - Nix O AU - Nowak G AU - Nunnemann T AU - Oberlack H AU - Olsson JE AU - Ozerov D AU - Palmen P AU - Panassik V AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Pawletta H AU - Perez E AU - Phillips JP AU - Pieuchot A AU - Pitzl D AU - Poschl R AU - Pope G AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyDESY, Inst Hochenergiephys, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandHumboldt Univ, Inst Phys, Berlin, GermanyBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Calif Davis, IIRPA, Davis, CA 95616, USAUniv Calif Davis, Dept Phys, Davis, CA 95616, USAUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Inst Hochenergiephys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Aix Marseille 2, IN2P3, CNRS, CPPM, F-13284 Marseille 07, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, IN2P3, CNRS, LPNHE, Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Nucl Ctr, Prague, Czech RepublicUniv Roma 3, Dipartimento Fis, Rome, ItalyUniv Roma 3, INFN Roma 1, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of dijet cross-sections in low Q(2) ep collisions and the extraction of an effective parton density for the virtual photon AB - The triple-differential dijet cross-section, d(3)sigma(ep)/dQ(2)d (E) over bar(t)(2) dx(gamma)(jets), is measured with the H1 detector at HERA as a function of the photon virtuality the fraction of the photon's momentum carried by the parton entering the hard scattering, x(gamma)(jets), and the square of the mean transverse energy, (E) over bar(t)(2), of the two highest E-t jets. Jets are found using a longitudinal boost-invariant k(T) clustering algorithm in the gamma*p center of mass frame. The measurements cover the ranges 1.6 < Q(2) < 80 GeV2 in virtuality and 0.1 < y < 0.7 in inelasticity y. The results are well described by leading order QCD models which include the effects of a resolved component to the virtual photon. Models which treat the photon as point-like fail to describe the data. An effective leading order parton density for the virtual photon is extracted as a function of the photon virtuality, the probing scale and the parton momentum fraction. The a:, and probing scale dependences of the parton density show characteristic features of photon structure, and a suppression of this structure with increasing Q(2) is seen MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 20 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000086888100002 L2 - LIQUID ARGON CALORIMETER; STRUCTURE-FUNCTION F2; LEADING ORDER; HADRON-COLLISIONS; JET PRODUCTION; PHOTOPRODUCTION; HERA; QCD; SCATTERING; ELECTRON SO - European Physical Journal C 2000 ;13(3):397-414 36 UI - 16048 AU - Adloff C AU - Aid S AU - Anderson M AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Arndt C AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Ban J AU - Baranov P AU - Barrelet E AU - Barschke R AU - Bartel T AU - Bassler U AU - Beck M AU - Behrend HJ AU - Beier C AU - Belousov A AU - Berger C AU - Bernardi G AU - Bertrand-Coremans G AU - Beyer R AU - Biddulph P AU - Bizot JC AU - Borras K AU - Boudry V AU - Bourov S AU - Braemer A AU - Braunschweig W AU - Brisson V AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Brune C AU - Burger J AU - Busser FW AU - Buniatian A AU - Burke S AU - Buschhorn G AU - Calvet D AU - Campbell AJ AU - Carli T AU - Charlet M AU - Clarke D AU - Clerbaux B AU - Cocks S AU - Contreras JG AU - Cormack C AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - De Roeck A AU - De Wolf EA AU - Delcourt B AU - Dirkmann M AU - Dixon P AU - Dlugosz W AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Ebert J AU - Ebert TR AU - Eckerlin G AU - Efremenko T AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Elsen E AU - Erdmann M AU - Fahr AB AU - Favart L AU - Fedotov A AU - Felst R AU - Feltesse J AU - Ferencei J AU - Ferrarotto F AU - Flamm K AU - Fleischer M AU - Flieser M AU - Flugge G AU - Fomenko A AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Gaede F AU - Garvey J AU - Gayler J AU - Gebauer M AU - Gerhards R AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Gorelov I AU - Grab C AU - Graissler K AU - Greenshaw T AU - Griffiths RK AU - Grindhammer G AU - Gruber A AU - Gruber C AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller T AU - Hampel M AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herynek I AU - Hewitt K AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoppner M AU - Hoffmann D AU - Holtom T AU - Horisberger R AU - Hudgson VL AU - Hutte M AU - Ibbotson M AU - Issever C AU - Itterbeck H AU - Jacquet M AU - Jaffre M AU - Janoth J AU - Jansen DM AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kalmus PIP AU - Kander M AU - Kant D AU - Karlsson M AU - Kathage U AU - Katzy J AU - Kaufmann HH AU - Kaufmann O AU - Kausch M AU - Kazarian S AU - Kenyon IR AU - Kermiche S AU - Keuker C AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Kohne JH AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Kramerkamper T AU - Krasny MW AU - Krehbiel K AU - Krucker D AU - Kupper A AU - Kuster H AU - Kuhlen M AU - Kurca T AU - Laforge B AU - Lahmann R AU - Landon MPJ AU - Lange W AU - Langenegger U AU - Lebedev A AU - Lehner F AU - Lemaitre V AU - Levonian S AU - Lindstroem M AU - Lipinski J AU - List B AU - Lobo G AU - Lopez GC AU - Lubimov V AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malinovski E AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martens J AU - Martin G AU - Martin R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - McMahon SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Migliori A AU - Mikocki S AU - Milstead D AU - Moeck J AU - Moreau F AU - Morris JV AU - Mroczko E AU - Muller D AU - Muller K AU - Murin H AU - Nagovizin V AU - Nahnhauer R AU - Naroska B AU - Naumann T AU - Negri I AU - Newman RP AU - Newton D AU - Nguyen HK AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Niedzballa C AU - Niggli H AU - Nowak G AU - Nunnemann T AU - Oberlack H AU - Olsson JE AU - Ozerov D AU - Palmen P AU - Panaro E AU - Panitch A AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Pawletta H AU - Peppel E AU - Perez E AD - DESY, Inst Hochenergiephys, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandHumboldt Univ, Inst Phys, Berlin, GermanyBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Calif Davis, Dept Phys, Davis, CA 95616, USAUniv Calif Davis, IIRPA, Davis, CA 95616, USAUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Inst Hochenergiephys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Aix Marseille 2, IN2P3, CNRS, CPPM, F-13284 Marseille 07, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Nucl Ctr, Prague, Czech RepublicUniv Roma 3, Dipartimento Fis, Rome, ItalyUniv Roma 3, INFN Roma 1, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyAdloff, C, DESY, Inst Hochenergiephys, Zeuthen, Germany TI - Di-jet event rates in deep-inelastic scattering at HERA AB - Di-jet event rates have been measured for deep-inelastic scattering in the kinematic domain 5 less than or similar to Q(2) less than or similar to 100 GeV2 and 10(-4) less than or similar to xBj less than or similar to 10(-2), and for jet transverse moments squared p(t)(*2) greater than or similar to Q(2). The analysis is based on data collected with the H1 detector at HERA in 1994 corresponding to an integrated luminosity of about 2 pb(-1). Jets are defined using a cone algorithm in the photon-proton centre of mass system requiring jet transverse momenta of at least 5 GeV. The di-jet event rates are shown as a function of Q(2) and x(Bj). Leading order models of point-like interacting photons fail to describe the data. Models which add resolved interacting photons or which implement the colour dipole model give a good description of the di-jet event rate. This is also the case for next-to-leading order calculations including contributions from direct and resolved photons MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000086888100003 L2 - MONTE-CARLO GENERATOR; LIQUID ARGON CALORIMETER; PARTON DISTRIBUTIONS; VIRTUAL PHOTON; CROSS-SECTIONS; EP SCATTERING; QCD CASCADES; COLLISIONS; PARTICLES; PHYSICS SO - European Physical Journal C 2000 ;13(3):415-426 37 UI - 16282 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Behrend HJ AU - Beier C AU - Belousov A AU - Berger C AU - Bernardi G AU - Berndt T AU - Bertrand-Coremans G AU - Biddulph P AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burke S AU - Burrage A AU - Buschhorn G AU - Calvet D AU - Campbell AJ AU - Carli T AU - Chabert E AU - Charlet M AU - Clarke D AU - Clerbaux B AU - Contreras JG AU - Cormack C AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - David M AU - Davidsson M AU - De Roeck A AU - De Wolf EA AU - Delcourt B AU - Demirchyan R AU - Diaconu C AU - Dirkmann M AU - Dixon P AU - Dodonov V AU - Donovan KT AU - Dowell JD AU - Droutskoi A AU - Ebert J AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Elsen E AU - Enzenberger M AU - Erdmann M AU - Fahr AB AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Feltesse J AU - Ferencei J AU - Ferrarotto F AU - Ferron S AU - Fleischer M AU - Flugge G AU - Fomenko A AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Gaede F AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Gorelov I AU - Grab C AU - Grassler H AU - Greenshaw T AU - Griffiths RK AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Hampel M AU - Haustein V AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hewitt K AU - Hilgers M AU - Hiller KH AU - Hilton CD AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Jonsson L AU - Johnson DP AU - Jones M AU - Jung H AU - Kastli HK AU - Kander M AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Kaufmann O AU - Kausch M AU - Keil F AU - Keller N AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Kohne JH AU - Kolanoski H AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Kramerkamper T AU - Krasny MW AU - Krehbiel H AU - Krucker D AU - Kruger K AU - Kupper A AU - Kuster H AU - Kuhlen M AU - Kurca T AU - Lachnit W AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Langenegger U AU - Lebedev A AU - Lehner F AU - Lemaitre V AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - Lobo G AU - Lobodzinska E AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - McMahon TR AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer A AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller D AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Negri I AU - Newman PR AU - Nguyen HK AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Niedzballa C AU - Niggli H AU - Nix O AU - Nowak G AU - Nunnemann T AU - Oberlack H AU - Olsson JE AU - Ozerov D AU - Palmen P AU - Panassik V AU - Pascaud C AU - Passaggio S AU - Patel GD AU - Pawletta H AU - Perez E AU - Phillips JP AU - Pieuchot A AU - Pitzl D AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumULB VUB, Interuniv Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Inst Hochenergirphys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys & Astron, Manchester, Lancs, EnglandUniv Aix Marseille 3, CPPM, IN2P3, CNRS, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Nucl Ctr, Prague, Czech RepublicUniv Roma 3, INFN Roma 1, Rome, ItalyUniv Roma 3, Dipartimento Fis, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandHumboldt Univ, Inst Phys, Berlin, GermanyBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice 04154, SlovakiaAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurements of transverse energy flow in deep-inelastic scattering at HERA AB - Measurements of transverse energy flow are presented for neutral current deep-inelastic scattering events produced in positron-proton collisions at HERA. the kinematic range covers squared momentum transfers Q(2) from 3.2 to 2 200 GeV2. the Bjorken scaling variable x from 8 . 10(-5) to 0.11 and the hadronic mass W from 66 to 233 GeV. The transverse energy flow is measured in the hadronic centre of mass frame and is studied as a function of Q(2). x, W and pseudorapidity. A comparison is made with QCD-based models. The behaviour of the mean transverse energy in tbe central pseudorapidity region and an interval corresponding to the photon fragmentation region are analysed as a function of Q(2) and W MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000086148700004 L2 - LIQUID ARGON CALORIMETER; INITIAL STATE RADIATION; HADRONIC FINAL-STATE; PERTURBATIVE-QCD; VIRTUAL PHOTON; JET PRODUCTION; SMALL-X; SPECTRA; COLLISIONS; CASCADES SO - European Physical Journal C 2000 ;12(4):595-607 38 UI - 14639 AU - Afraimovich V AU - Lin WW AU - Rulkov NF AD - Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoNatl Tsing Hua Univ, Dept Math, Hsinchu, TaiwanUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAAfraimovich, V, Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, Mexico TI - Fractal dimension for poincare recurrences as an indicator of synchronized chaotic regimes AB - The studies of the phenomenon of chaos synchronization are usually based upon the analysis of the existence of transversely stable invariant manifold that contains an invariant set of trajectories corresponding to synchronous motions. In this paper we develop a new approach that relies on the notions of topological synchronization and the dimension for Poincare recurrences. We show that the dimension of Poincare recurrences may serve as an indicator for the onset of synchronized chaotic oscillations. This indicator is capable of detecting the regimes of chaos synchronization characterized by the frequency ratio p:q MH - Mexico|San Luis Potosi MH - Taiwan MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000165985700004 L2 - SYSTEMS SO - International Journal of Bifurcation and Chaos 2000 ;10(10):2323-2337 39 UI - 15027 AU - Afraimovich V AU - Schmeling J AU - Ugalde E AU - Urias J AD - UASLP, IICO, San Luis Potosi 78000, MexicoFree Univ Berlin, Fachbereich Math & Informat, D-14195 Berlin, GermanyAfraimovich, V, UASLP, IICO, Alvaro Obregon 64, San Luis Potosi 78000, Mexico TI - Spectra of dimensions for Poincare recurrences AB - The spectra of Poincare recurrences for two classes of dynamical systems are obtained in the framework of the Caratheodory construction. One class contains systems which are topologically conjugate to subshifts with the specification property, the other consists of minimal multipermutative symbolic systems. The spectra are shown to be solutions of a non-homogeneous Bowen equation, and their relationship with multifractal spectra of Lyapunov exponents is exposed MH - Germany MH - Mexico|San Luis Potosi PB - SPRINGFIELD: SOUTHWEST MISSOURI STATE UNIV RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000090095300011 L2 - dimension theory;Poincare recurrences;multifractal analysis;EXPONENTS; ENTROPY SO - Discrete and Continuous Dynamical Systems 2000 ;6(4):901-914 40 UI - 15275 AU - Afraimovich V AU - Chazottes JR AU - Saussol B AD - IICO, UASLP, San Luis Potosi 78210, MexicoInst Super Tecn, Dept Matemat, P-1049001 Lisbon, PortugalAfraimovich, V, IICO, UASLP, A Obregon 64, San Luis Potosi 78210, Mexico TI - Local dimensions for Poincare recurrences AB - Pointwise dimensions and spectra for measures associated with Poincare recurrences are calculated for arbitrary weakly specified subshifts with positive entropy and for the corresponding special flows. It is proved that the Poincare recurrence for a "typical" cylinder is asymptotically its length. Examples are provided which show that this is not true for some systems with zero entropy. Precise formulas for dimensions of measures associated with Poincare recurrences are derived, which are comparable to Young's formula for the Hausdorff dimension of measures and Abramov's formula for the entropy of special flows MH - Mexico|San Luis Potosi MH - Portugal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Mathematics U5 - J;Article AV - English IS - 1079-6762 UR - ISI:000089252900001 SO - Electronic Research Announcements of the American Mathematical Society 2000 ;6():64-74 41 UI - 15580 AU - Afraimovich V AU - Fernandez B AD - UASLP, Inst Invest Commun Opt, San Luis Potosi, SLP, MexicoCNRS, Ctr Phys Theor, F-13288 Marseille 09, FranceAfraimovich, V, UASLP, Inst Invest Commun Opt, Av Karakorum 1470,Lomas 4ta Secc, San Luis Potosi, SLP, Mexico TI - Topological properties of linearly coupled expanding map lattices AB - We study topological aspects of the dynamics of one-dimensional lattices of coupled expanding maps of an interval, the coupling being a convolution by a sequence in e(1)(Z). Some conditions on the local map are given such that the corresponding coupled map lattice, provided the coupling is sufficiently small, has an invariant set in which the symbolic dynamics is described by the product of local symbolic systems. It follows that both periodic orbits and travelling waves of any real velocity are dense in the uniform topology. Furthermore, we develop a renormalization technique in a family of lattices of coupled piecewise affine maps parametrized by the local slope and the coupling. Self-similarity of the dynamics in this family then follows. AMS classification scheme numbers: 37L60 MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0951-7715 UR - ISI:000088344200001 SO - Nonlinearity 2000 ;13(4):973-993 42 UI - 15891 AU - Afraimovich V AU - Maass A AU - Urias J AD - Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, SLP, MexicoUniv Chile, Dept Ingn Matemat, Santiago, ChileAfraimovich, V, Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, SLP, Mexico TI - Symbolic dynamics for sticky sets in Hamiltonian systems AB - Hamiltonian systems, possessing an infinite hierarchy of islands-around-islands structure, have sticky sets, sets of all limiting points of islands of stability. A class of symbolic systems, called multipermutative, is introduced to model the dynamics in the sticky (multifractal) sets. Every multipermutative system is shown to consist of a collection of minimal subsystems that are topologically conjugate to adding machines. These subsystems are uniquely ergodic. Sufficient and necessary conditions of topological conjugacy are given. A subclass of sticky sets is constructed for which Hausdorff dimension is found and multifractal decomposition is described MH - Chile MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0951-7715 UR - ISI:000087488900006 L2 - RENORMALIZATION SO - Nonlinearity 2000 ;13(3):617-637 43 UI - 15474 AU - Afraimovich VS AU - Young TR AD - IICO UASLP, San Luis Potosi 78000, MexicoOhio Univ, Dept Math, Athens, OH 45701, USAAfraimovich, VS, IICO UASLP, A Obregon 64, San Luis Potosi 78000, Mexico TI - Multipliers of homoclinic orbits on surfaces and characteristics of associated invariant sets AB - Suppose that f is a surface diffeomorphism with a hyperbolic fixed point O and this fixed point has a transversal homoclinic orbit. It is well known that in a vicinity of this type of homoclinic there are hyperbolic invariants sets. We introduce smooth invariants for the homoclinic orbit which we carl the multipliers. As an application, we study the influence of the multipliers on numerical invariants of the hyperbolic invariant sets as the vicinity becomes small MH - Mexico|San Luis Potosi MH - USA PB - SPRINGFIELD: SOUTHWEST MISSOURI STATE UNIV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000088669900014 L2 - hyperbolic set;smooth invariant;transversal homoclinic SO - Discrete and Continuous Dynamical Systems 2000 ;6(3):691-704 44 UI - 15799 AU - Ageev S AU - Bogatyi S AU - Jimenez R AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoBrest State Univ, Dept Math, Brest, ByelarusMoscow State Univ, Mech & Math Fac, Dept Gen Topol & Geometry, Moscow 119899, RussiaAgeev, S, UNAM, Inst Matemat, Av Univ S-N,Lomas Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Free equivariant extensors AB - We prove for a finite group G and a compact metric G-space Y that the conditions (1) Y is an element of LCn-1 boolean AND Cn-1, and (2) Y is an element of G-AE(X), for every normal n-dimensional space X endowed with a free numerable action of the group G, are equivalent. As a corollary we obtain: (A) For the space X endowed with a free action of the finite group G the conditions (1) the space X is normal, dim X less than or equal to n and K (X; G) less than or equal to n + 1, (2) the space X is normal, dimX less than or equal to n and K(X; G) < infinity; (3) G * ... * G is an element of G-AE(X), are equivalent. (B) For a paracompact space X with a free action of the finite group G the inequality K(X; G) less than or equal to dim X + 1 holds. (C) 2000 Elsevier Science B.V. All rights reserved MH - Byelarus MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000087669100002 L2 - free action;free spaces;free equivariant extensors;FIXED-POINTS; SPACES; MAPS SO - Topology and Its Applications 2000 ;105(2):157-166 45 UI - 15922 AU - Aguiar JA AU - Tellez DAL AU - Yadava YP AU - Ferreira JM AU - Montarroyos E AU - Guzman J AU - Chavira E AD - Univ Fed Pernambuco, Dept Fis, Lab Supercond, BR-50670901 Recife, PE, BrazilNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAguiar, JA, Univ Fed Pernambuco, Dept Fis, Lab Supercond, Av Prof Luis de Barros Freire S-N, BR-50670901 Recife, PE, Brazil TI - Structural and superconducting properties of the composite LaBaCaCu3O7-delta-Ba2HOHfO5.5 AB - We have successfully fabricated HTS - ceramic insulator composite system LaBaCaCu3O7-delta-Ba2HoHfO5.5 in which particles of the superconductor and insulator materials could coexist with well defined separated phases left intact by stringent high-temperature processing conditions. Addition of Ba2HoHfO5.5 did not have any deteriorating effect on the superconducting properties of the LaBaCaCu3O7-delta superconductor. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000087311700338 L2 - Ba2HOHfO5.5;(CaLa)(BaLa)(2)Cu3O6+x;superconducting composite SO - Physica B 2000 ;284():679-680 46 UI - 15473 AU - Aguilar G AU - Morlon-Guyot J AU - Trejo-Aguilar B AU - Guyot JP AD - IRD, ORSTOM, Lab Biotechnol Microbienne Trop, Montpellier 1, FranceUNAM, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoGuyot, JP, IRD, ORSTOM, Lab Biotechnol Microbienne Trop, 911 Ave Agropolis,BP 5045, Montpellier 1, France TI - Purification and characterization of an extracellular alpha-amylase produced by Lactobacillus manihotivorans LMG 18010(T), an amylolytic lactic acid bacterium AB - This work presents the purification and characterization of an extracellular alpha-amylase (1,4-alpha-D-glucan glucanohydrolase, EC 3.2.1.1) produced by a new lactic acid bacterium: Lactobacillus manihotivorans able to produce L(+) lactic acid from starch. The molecular weight was found to be 135 kDa. The temperature and pH optimum were 55 degrees C and 5.5, respectively, and pI was 3.8. The alpha-amylase had good stability at pH range from 5 to 6 and the enzyme was sensitive to temperature, losing activity within 1 h of incubation at 55 degrees C. Higher thermal stability was observed when the enzyme was incubated in presence of soluble starch, K-m value and activation energy were 3.44 mg/ml and 32.55 kJ/mol, respectively. Amylose was found to be a better substrate than soluble starch and amylopectin. Al3+, Fe3+, and Hg2+ (10 mM) almost completely inhibited the alpha-amylase. (C) 2000 Elsevier Science Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 20 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-0229 UR - ISI:000088713200008 L2 - alpha-amylase;lactic acid bacteria;Lactobacillus manihotivorans;starch;cassava sour starch;AMYLOVORUS; PLANTARUM; STRAIN; SILAGE; FISH; A6 SO - Enzyme and Microbial Technology 2000 ;27(6):406-413 47 UI - 15373 AU - Aguilar JF AU - Lera M AU - Sheppard CJR AD - Univ Sydney, Sch Phys A 28, Dept Phys Opt, Sydney, NSW 2006, AustraliaUniv Cagliari, Dipartimento Ingn Meccan, I-09123 Cagliari, ItalyUniv Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, AustraliaAguilar, JF, Inst Nacl Astrofis Opt & Elect, Santa Maria Tonantzintla, Puebla 72840, Mexico TI - Imaging of spheres and surface profiling by confocal microscopy AB - An investigation of the imaging of spheres can aid in understanding details of the surface profiling method of confocal microscopy. The use of semicircular masks to eliminate artifacts in confocal profiling is investigated experimentally. A theoretical treatment of image formation for a spherical object in reflection confocal microscopy is presented. For large spheres a simple approximate theory is described and is shown to be equivalent to application of the Kirchhoff theory for surface scattering; (C) 2000 Optical Society of America OCIS codes: 180.0180, 180.1790, 170.6900, 120.6660 MH - Australia MH - Italy MH - Mexico|Puebla PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000089024500020 L2 - ROUGH-SURFACE; DARK-FIELD; SCATTERING; APERTURE; RECONSTRUCTION; SYSTEMS; STOP SO - Applied Optics 2000 ;39(25):4621-4628 48 UI - 15013 AU - Aguilar LK AU - guilar-Cordova E AU - Ando D AU - rmendariz-Borunda J AU - Burd PR AU - Butler EB AU - Carter B AU - Chiang YL AU - Glorioso JC AU - Henderson DR AU - Jolly D AU - McKenny GP AU - Nemunaitis J AU - Rives M AU - Scherer S AU - Woo SLC AD - Baylor Coll Med, Ctr Cell & Gene Therapy, Houston, TX 77030, USAAdvantagene Inc, San Diego, CA, USACell Genesys Inc, Foster City, CA, USAUniv Guadalajara, CUCS, Inst Mol Biol Med, Guadalajara 44430, Jalisco, MexicoMaxygen Inc, Redwood City, CA, USABaylor Coll Med, Dept Radiat Oncol, Houston, TX 77030, USATargeted Genet Corp, Seattle, WA, USAAventis Gencell, Preclin Oncol, Hayward, CA, USAUniv Pittsburgh, Sch Med, Pittsburgh, PA, USACalydon Inc, Sunnyvale, CA, USAChiron Corp, Ctr Gene Therapy, San Diego, CA, USARice Univ, Dept Religious Studies, Houston, TX 77251, USAUS Oncol, Dallas, TX, USABaylor Coll Med, Human Genome Sequencing Ctr, Houston, TX 77030, USAAcad Press, Mol Therapy, New York, NY, USACUNY Mt Sinai Sch Med, Inst Gene Therapy & Mol Med, New York, NY 10029, USAAguilar-Cordova, E, Baylor Coll Med, Ctr Cell & Gene Therapy, 1102 Bates St,Suite 1170, Houston, TX 77030 USA TI - A prescription for gene therapy MH - Mexico|Jalisco MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Editorial Material AV - English IS - 1525-0016 UR - ISI:000090048100002 SO - Molecular Therapy 2000 ;1(5):385-388 49 UI - 15682 AU - Aguilar S AU - Tritlla J AU - Hafid A AU - Julivert M AU - Arboleya ML AU - Saidi A AD - Natl Autonomous Univ Mexico, Inst Geol, Dept Geoquim, Mexico City 04510, DF, MexicoUniv Autonoma Barcelona, Fac Ciencies, Dept Geol, Unitat Geotecton, Bellaterra, SpainUniv Cadi Ayyad, Fac Sci & Tech, Dept Geol, Marrakech, MoroccoTritlla, J, Natl Autonomous Univ Mexico, Inst Geol, Dept Geoquim, Circuito Invest Cient,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Geotectonic significance of the textural evolution of fluid inclusions in Precambrian quartz veins from the "Boutonniere de Zenaga" (Anti-Atlas, Morocco) AB - In the Precambrian Zenaga inlier (boutonniere) in the Anti-Atlas of Morocco, many quartz veins crosscut the Ebournian (Precambrian) basement. The quartz veins predate the deposition of the overlying Precambrian III units, and were probably the feeding channels for the overlying jasperoid formation. The fluid inclusion microthermometry and textural studies show the evolution in a single crystal, from intensely recrystallized inclusions to almost untouched ones recording the uplift of the Ebournian basement. The uplift provoked the over-pressure of the inner fluid inclusions and their "explosion", giving rise to "hook-like" or "decrepitation cluster" textures, while the fluid inclusions located in the outer zones only show necking-down phenomena. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Morocco MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000088104900067 L2 - Precambrian fluids;re-crystallization;fluid inclusion textures;uplifting;Zenaga;Anti-Atlas;Morocco;REEQUILIBRATION SO - Journal of Geochemical Exploration 2000 ;69():363-368 50 UI - 15917 AU - Aguilera EF AU - Kolata JJ AU - Nunes FM AU - Becchetti FD AU - DeYoung PA AU - Goupell M AU - Guimaraes V AU - Hughey B AU - Lee MY AU - Lizcano D AU - Martinez-Quiroz E AU - Nowlin A AU - O'Donnell TW AU - Peaslee GF AU - Peterson D AU - Santi P AU - White-Stevens R AD - Inst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Notre Dame, Dept Phys, Notre Dame, IN 46556, USAInst Super Tecn, Ctr Multidisciplinar Astrofis, P-1096 Lisbon, PortugalUniv Fernando Pessoa, Dept Sci & Technol, P-4200 Oporto, PortugalUniv Michigan, Dept Phys, Ann Arbor, MI 48109, USAHope Coll, Dept Phys, Holland, MI 49422, USAHope Coll, Dept Chem, Holland, MI 49422, USAAguilera, EF, Inst Nacl Invest Nucl, Dept Acelerador, AP 18-1027, Mexico City 11801, DF, Mexico TI - Transfer and/or breakup modes in the He-6+Bi-209 reaction near the Coulomb barrier AB - Reaction products from the interaction of He-6 with Bi-209 have been measured at energies near the Coulomb barrier. A He-4 group of remarkable intensity, which dominates the total reaction cross section, has been observed. The angular distribution of the group suggests that it results primarily from a direct nuclear process. it is likely that this transfer and/or breakup channel is the doorway state that accounts for the previously observed large sub-barrier fusion enhancement in this system MH - Mexico|Distrito Federal MH - Portugal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 93 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000087266300007 L2 - HEAVY-ION FUSION; HALO NUCLEI; ENERGIES; LI-11; HE-6 SO - Physical Review Letters 2000 ;84(22):5058-5061 51 UI - 13855 AU - Aguirre H AU - Lombarte A AD - CSIC, Inst Ciencias Mar, E-08039 Barcelona, SpainMazatlan INP, Ctr Reg Invest Pesquera, Sinaloa, MexicoLombarte, A, CSIC, Inst Ciencias Mar, Passeig Joan Borbo S-N, E-08039 Barcelona, Spain TI - Distribution pattern of taste buds along hyoidal barbels of Mullus barbatus and M-surmuletus AB - The external taste buds of bony fishes are differentiated and grouped throughout the body epithelium, concentrating in the buccopharyngeal cavity or in certain external organs such as the lips, barbers or fins, The family Mullidae (goatfishes) is characterized by having barbels covered with taste buds (TBs). However, It is not known how the TBs are distributed and how their characteristics vary along the barbels, To obtain answers to these questions, the morphological variability in taste bud density (delta (TB)), pore area (A(p)) and taste bud area (A(TB)) was studied in Mullus barbatus (L,, 1758) (red mullet) and NI. surmuletus (L., 1758) (striped red mullet), for fish ranging in size from 58 to 227 and from 56 to 287 mm in total length (L-T), respectively. Assuming that larger fish are older, in both species the pore area (A(p)) and taste bud area (A(TB)) increased with ontogenic development. Also, in both species clear differences were observed along the barbel, The delta (TB) increased from the basal area to the apical area, whereas both the A(p) and A(TB) had an inverse pattern. Copyright (C) 2001 S. Karger AG, Basel MH - Mexico|Sinaloa MH - Spain PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 1 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0006-8977 UR - ISI:000168330900004 L2 - external taste buds;morphological variability;density;pore area and taste bud area;fish;hyoidal barbels;MERLUCCIUS; GADIFORMES; TELEOSTEI; MULLIDAE; FISH; HAKE SO - Brain Behavior and Evolution 2000 ;56(6):323-329 52 UI - 15459 AU - Aguirre NM AU - de la Cruz GG AU - Gurevich YG AU - Logvinov GN AU - Kasyanchuk MN AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoTernopil Acad Natl Econ, Dept Special Natl Econ, Ternopil, UkraineAguirre, NM, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 17-740, Mexico City 07000, DF, Mexico TI - Heat diffusion in two-layer structures: Photoacoustic experiments AB - The effective thermal conductivity and thermal diffusivity of a two-layer system are investigated from the theoretical point of view for application to photoacoustic experiments. The effective thermal parameters are obtained by comparing the temperature distribution on the left or right surface of the layered structure and some effective one-layer material. These effective thermal parameters are calculated for some special cases as for example, low and high chopper frequency. The influence of the interface thermal contact between the layers plays an important role on the effective thermal parameters. It is shown that the effective thermal conductivity and thermal diffusivity depend strongly upon the used photothermal technique MH - Mexico|Distrito Federal MH - Ukraine PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800140 L2 - 2-LAYER SYSTEM SO - Physica Status Solidi B-Basic Research 2000 ;220(1):781-787 53 UI - 15277 AU - Agundis C AU - Pereyra A AU - Zenteno R AU - Brassart C AU - Sierra C AU - Vazquez L AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Lab Inmunol, Mexico City 04510, DF, MexicoUniv Lille 1, Chim Biol Lab, F-59655 Villeneuve Dascq, FranceUMR CNRS 58650, F-59655 Villeneuve Dascq, FranceUniv Autonoma Estado Morelos, Ctr Invest Quim, Lab Lectinas, Cuernavaca 62210, Morelos, MexicoAgundis, C, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Lab Inmunol, POB 70 159, Mexico City 04510, DF, Mexico TI - Quantification of lectin in freshwater prawn (Macrobrachium rosenbergii) hemolymph by ELISA AB - An enzyme-linked immunoabsorbent assay was developed to quantify the lectin present in the hemolymph of the freshwater prawn Macrobrachium rosenbergii. This method involves the use of murine monoclonal IgG1 with kappa light chain (designated as 3G1) antibodies raised against the purified lectin, the assay that we developed recognized as little as 30 ng/ml of lectin, and was used to measure the lectin concentration in animals at different maturation stages. The highest concentration of lectin was identified in the hemolymph from post-larval prawns and the lowest in molt stage adult animals. The hemagglutination activity of the lectin was four-fold higher in adult than in juvenile specimens, although in all cases N-acetylated sugar residues, such as N-acetyl-D-glucosamine, N-acetyl-D-galactosamine, and N-acetyl-D-neuraminic acid were inhibitors of the lectin activity, suggesting that lectin plays a role in the transport of N-acetylated sugar in juvenile prawns. Our results indicate that lectin concentration and hemagglutinating activity could be influenced by developmental conditions of the freshwater prawn. (C) 2000 Elsevier Science Inc. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 0305-0491 UR - ISI:000089335000004 L2 - Macrobrachium rosenbergii;sialic acid specific lectin;crustacean lectin;developmental regulation;ELISA;monoclonal antibodies;RECOGNITION; IMMUNITY; HEMOCYTES; CRUSTACEA; ANTIBODY; PROTEIN; CELLS SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2000 ;127(2):165-172 54 UI - 15945 AU - Aimone SL AU - Mirifico MV AU - Caram JA AU - Mitnik DG AU - Piro OE AU - Castellano EE AU - Vasini EJ AD - Natl Univ La Plata, Dept Quim, Fac Ciencias Exactas, INIFTA, RA-1900 La Plata, ArgentinaCIMAV, Dept Polimeros, Chihuahua, MexicoUNLP, Dept Fis, Fac Ciencias Exactas, La Plata, Buenos Aires, ArgentinaUniv Sao Paulo, Inst Fis Sao Carlos, BR-13560 Sao Carlos, SP, BrazilVasini, EJ, Natl Univ La Plata, Dept Quim, Fac Ciencias Exactas, INIFTA, CC 16,Suc 4, RA-1900 La Plata, Argentina TI - Unexpected production of 2,4,6-triphenyl-1,3,5-triazine in the electroreduction of 3,4-diphenyl-1,2,5-thiadiazole 1-oxide. Theoretical estimation of reactive sites for 1-oxide and 1,1-dioxide 1,2,5-thiadiazoles AB - 3,4-Diphenyl-1,2,5-thiadiazole 1-oxide (1a) in acetonitrile solution is electroreduced to 2,4,6-triphenyl-1,3,5-triazine and 3,4-diphenyl-1,2,5-thiadiazole. This behavior is very different from that of similar compounds with other oxidation states of the heterocyclic sulfur atom, such as the 1,1-dioxide derivative (2) and the aromatic 3,4-diphenyl thiadiazole parent ring. The Fukui functions were calculated for 1a and 2 to estimate their reactivity, compare their reactive site, and rationalize the divergent electrochemical properties of 1a. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Chihuahua PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000087199400004 L2 - thiadiazoles;electrochemistry;structure-activity;reduction;ACETONITRILE; DERIVATIVES; HYDROLYSIS; SOLVENTS SO - Tetrahedron Letters 2000 ;41(19):3531-3535 55 UI - 14537 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Simao FRA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi, University, MS 38677, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 14000, DF, MexicoFermilab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Mexico City, DF, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi, University, MS 38677, USA TI - Asymmetries in the production of Lambda(0), Xi(-), and Omega(-) hyperons in 500 GeV/c pi(-)-nucleon interactions AB - Using data from Fermilab fixed-target experiment E791, we have measured particle-antiparticle production asymmetries for Lambda (0), Xi (-), and Omega (-) hyperons in pi (-) -nucleon interactions at 500 GeV/c. The asymmetries are measured as functions of Feynman-x (x(F)) and p(T)(2) over the ranges -0.12 less than or equal to x(F) less than or equal to 0.12 and 0 less than or equal to p(T)(2) less than or equal to 4 (GeV/c)(2). We find substantial asymmetries, even at x(F) = 0. We also observe leading-particle-type asymmetries which qualitatively agree with theoretical predictions. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000166228400002 L2 - INTRINSIC CHARM; P INTERACTIONS; GEV-C; D+; POLARIZATION; PARTICLES; MESON; MODEL SO - Physics Letters B 2000 ;496(1-2):9-18 56 UI - 14584 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Simao FRA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 07000, DF, MexicoFermi Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAUniv Mississippi, University, MS 38677, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Mexico City, DF, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAMagnin, J, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil TI - Asymmetries in the production of Lambda(+)(c) and Lambda(-)(c) baryons in 500 GeV/c pi(-) nucleon interactions AB - We present a measurement of asymmetries in the production of Lambda (+)(c) and Lambda (-)(c) baryons in 500 GeV/c pi (-)-nucleon interactions from the E791 experiment at Fermilab. The asymmetries were measured as functions of Feynman x (x(F)) and transverse momentum squared (p(T)(2)) using a sample of 1819 +/- 62 Lambda (c)'s observed in the decay channel Lambda (+)(c) --> pK(-)pi (+). We observe more Lambda (+)(c) than Lambda (-)(c) baryons, with an asymmetry of (12.7 +/- 3.4 +/- 1.3)% independent of x(F) and p(T)(2) in our kinematical range (-0.1 less than or equal to x(F) less than or equal to 0.6 and 0.0 less than or equal to p(T)(2) less than or equal to 8.0 (GeV/c)(2)). This Lambda (c) asymmetry measurement is the first with data in both the positive and negative x(F) regions. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000166098100005 L2 - D+; MESON SO - Physics Letters B 2000 ;495(1-2):42-48 57 UI - 16606 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits C AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi Oxford, University, MS 38677, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 07000, DF, MexicoFermi Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi Oxford, University, MS 38677, USA TI - Multidimensional resonance analysis of Lambda(+)(c) -> pK(-) pi(+) AB - We present the results of a five-dimensional resonant amplitude analysis of the Lambda(c)(+) --> pK(-)pi(+) system based on 946 +/- 38 reconstructed decays. These data were produced in 500 GeV/c pi(-)-N interactions by Fermilab experiment E791. We report measurements of the amplitudes for Lambda(c)(+) decay into nonresonant pK(-)pi(+) and to p (K) over bar*(0)(890), Delta(++)(1232)K-, and Lambda(1520)pi(+) and we comment on other possible resonant enhancements. This is the first complete amplitude analysis of the Lambda(c)(+) --> pK(-)pi(+) system. We find that (54.8 +/- 5.5 +/- 3.5)% of the decays are nonresonant, (19.5 +/- 2.6 +/- 1.8)% of the decays are via the (K) over bar*(0) resonance, (18.0 +/- 2.9 +/- 2.9)% of the decays are via the Delta(++) resonance, and (7.7 +/- 1.8 +/- 1.1)% of the decays are via the Lambda(1520) resonance. We find evidence for an increasingly negative polarization of the Lambda(c)(+) baryons as a function of p(T)(2), in agreement with a recent model [W.G.D. Dharmaratna, G.R. Goldstein, Phys. Rev. D 53 (1996) 1073; G.R. Goldstein, hep-ph/9907573] and with a related measurement [M. Jezabek, K. Rybicki, R. Rylko, Phys. Lett. B 286 (1992) 175]. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000084909800016 L2 - multidimensional;resonance;Lambda(c);polarization;C+ SO - Physics Letters B 2000 ;471(4):449-459 58 UI - 16611 AU - Al-Falou AA AU - Ball RC AU - Larralde H AD - Univ Warwick, Coventry CV4 7AL, W Midlands, EnglandUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoAl-Falou, AA, Univ Warwick, Coventry CV4 7AL, W Midlands, England TI - Dynamical weight functions for a planar crack AB - The stress intensity factors are evaluated for a moving planar crack for loadings which vary arbitrarily in time and three dimensions of space. We exploit the adjoint elasticity equation obeyed by the corresponding weight functions, and a new and more universal Wiener-Hopf factorization of the Rayleigh function, this beings the central difficulty in such calculations. For the mode a weight function we give further asymptotic results crucial to a subsequent calculation of crack stability with respect to out-of-plane perturbations MH - United Kingdom MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000084935200044 L2 - MOVING CRACK SO - Physical Review e 2000 ;61(1):298-311 59 UI - 15495 AU - Alarcon GS AU - Amigo MC AD - Univ Alabama, Div Clin Immunol Rheumatol, Birmingham, AL 35294, USAUniv Peruana Cayetano Heredia, Lima, PeruUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoInst Nacl Caridol Ignacio Chavez, Mexico City, DF, MexicoAlarcon, GS, Univ Alabama, Div Clin Immunol Rheumatol, MEB 615,1813 6th Ave S, Birmingham, AL 35294 USA TI - The impact of women in the practice of academic and clinical rheumatology in the Americas MH - USA MH - Mexico|Distrito Federal MH - Peru PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Editorial Material AV - English IS - 0315-162X UR - ISI:000088543500002 L2 - MEDICAL-EDUCATION; FACULTY; CAREER; PHYSICIANS; CHALLENGES SO - Journal of Rheumatology 2000 ;27(8):1827-1829 60 UI - 15430 AU - Alarcon J AU - Becerra J AU - Silva M AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Bio Bio, Fac Ciencias, Chillan, ChileConcepcion Univ, Fac Ciencias Nat, Dept Bot, Lab Quim Prod Nat, Concepcion 2407, Chile TI - Insecticidal activities of agarofurans from maytenus disticha (celastraceae) MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246100279 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U73-U74 61 UI - 15250 AU - Alas OT AU - Sanchis M AU - Tkacenko MG AU - Tkachuk VV AU - Wilson RG AD - Univ Sao Paulo, Inst Matemat & Estatist, BR-05315970 Sao Paulo, BrazilUniv Jaume 1, Dept Matemat, Castellon, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoTkachuk, VV, Univ Sao Paulo, Inst Matemat & Estatist, Caixa Postal 66281, BR-05315970 Sao Paulo, Brazil TI - Irresolvable and submaximal spaces: Homogeneity versus sigma-discreteness and new ZFC examples AB - An example of an irresolvable dense subspace of {0, 1)(c) is constructed in ZFC. We prove that there can be no dense maximal subspace in a product of first countable spaces, while under Booth's Lemma there exists a dense submaximal subspace in [0, 1](c). It is established that under the axiom of constructibility any submaximal Hausdorff space is sigma-discrete. Hence it is consistent that there are no submaximal normal connected spaces. If there exists a measurable cardinal, then there are models of ZFC with non-sigma-discrete maximal spaces. We prove that any homogeneous irresolvable space of non-measurable cardinality is of first category. In particular, any homogeneous submaximal space is strongly sigma-discrete if there are no measurable cardinals. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000089320000004 L2 - irresolvable space;sep maximal space;submaximal space;homogeneous space SO - Topology and Its Applications 2000 ;107(3):259-273 62 UI - 15271 AU - Alas OT AU - Comfort WW AU - Garcia-Ferreira S AU - Henriksen M AU - Wilson RG AU - Woods RG AD - Univ Sao Paulo, BR-05315970 Sao Paulo, BrazilWesleyan Univ, Middletown, CT 06459, USANatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoHarvey Mudd Coll, Claremont, CA 91711, USAUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Unidad Iztapalapa, Mexico City 09340, DF, MexicoUniv Manitoba, Winnipeg, MB R3T 2N2, Canada TI - When is vertical bar C(XxY)vertical bar=vertical bar C(X)vertical bar vertical bar C(Y)vertical bar? AB - Sufficient conditions on the Tychonoff spaces X and Y are found that imply that the equation in the title holds. Sufficient conditions on the Tychonoff space X are found that ensure that the equation holds for every Tychonoff space Y. A series of examples (some using rather sophisticated cardinal arithmetic) are given that witness that these results cannot be generalized much MH - Brazil MH - Canada MH - Mexico|Distrito Federal MH - USA PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000089217000006 SO - Houston Journal of Mathematics 2000 ;26(1):83-115 63 UI - 16456 AU - Alberdi E AU - Lehman M AU - Torroba R AU - Garavaglia M AD - Univ Nacl Sur, Dept Fis, Lab Opt, RA-8000 Bahia Blanca, ArgentinaSofilab SACV, Mexico City, DF, MexicoUniv Nacl La Plata, La Plata, ArgentinaCtr Invest Opt, La Plata, ArgentinaLehman, M, Univ Nacl Sur, Dept Fis, Lab Opt, RA-8000 Bahia Blanca, Argentina TI - Entropic propagation of Gaussian and super-Gaussian-like beams AB - An entropic formulation to describe the free propagation of Gaussian beams, in a similar way to the thermodynamic theory is developed. We consider two basic applications: (1) an extension to super-Gaussian-like (SGL) beams, and (2) the effect of lenses (convergent and divergent) on the propagation of Gaussian beams. We are interested in such applications because the SGL profiles are obtained through the convolution product using rectangle and Gaussian functions and so, they can be related to the Gaussian beams. The propagation in the Fresnel and Fraunhofer regions are studied, obtaining the laws for the optical entropy of the system. Also, we include some properties and a brief discussion about the condition under which the beam can be considered as an isolated system. For both applications, the evolution of the characteristic width is derived from the entropic postulates. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000085450600001 L2 - BESSEL BEAMS SO - Optics Communications 2000 ;175(1-3):1-12 64 UI - 15490 AU - Albiter A AU - Leon CA AU - Drew RAL AU - Bedolla E AD - McGill Univ, Dept Min & Met Engn, Montreal, PQ H3A 2B2, CanadaUMSNH, Inst Invest Met, Morelia 58000, Michoacan, MexicoDrew, RAL, McGill Univ, Dept Min & Met Engn, MH Wong Bldg,3610 Univ St, Montreal, PQ H3A 2B2, Canada TI - Microstructure and heat-treatment response of Al-2024/TiC composites AB - Composites of a commercial Al-2024 alloy reinforced with particulate TiC have been produced by the pressureless melt infiltration route. Infiltration was carried out at 1200 degrees C for 2 h and composite materials containing 52 and 55 vol.% TiC were obtained. The phases other than the matrix and the reinforcement were identified as CuAl2, AlTi3, Ti3AlC, and TiAl3. It was found that the composites were age hardenable after solutionizing at 530 degrees C for 150 min and subsequent natural or artificial ageing at 190 degrees C. Mechanical properties of the composites, as-fabricated and heat-treated, showed a strong dependency on the ceramic content. After heat treatment, the 55% TiC composites showed an increase of hardness from 28.5 to 38.5 HRC; meanwhile ultimate tensile strength increased from 379 to 480 MPa. A similar behavior, as a function of heat treatment, was observed for the composites containing 52% TiC, but the estimated values were lower than those obtained for the 55% TiC composites. Scanning electron microscope (SEM) examination revealed transgranular fracture throughout the CuAl2 agglomerated precipitates in the as-fabricated composites. In the heat-treated conditions, brittle and intergranular fractures were observed. (C) 2000 Elsevier Science S.A. All rights reserved MH - Canada MH - Mexico|Michoacan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 16 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000088628300013 L2 - metal matrix composites;Al-2024 alloy;titanium carbide;heat treatment;microstructure;tensile properties;METAL-MATRIX COMPOSITES; TENSILE PROPERTIES; FRACTURE-BEHAVIOR; CREEP-BEHAVIOR; ALUMINUM-ALLOY; TIC COMPOSITES; AL4C3 SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2000 ;289(1-2):109-115 65 UI - 16604 AU - Albores A AU - Cebrian ME AU - Dekant W AU - De Matteis F AU - az-Barriga F AU - Barril-Antuna J AU - Fowler J AU - Gil L AU - Jaramillo-Juarez F AU - King LJ AU - Olarte G AU - Ostrosky-Wegman P AU - Patno RI AU - Torres-Alanis O AU - Manno M AD - Cinvestav IPN, Sect Toxicol Ambiental, Dept Farmacol & Toxicol, Mexico City 07360, DF, MexicoUniv Wurzburg, Inst Pharmacol & Toxicol, D-97070 Wurzburg, GermanyUniv Turin, Inst Pharmacol, Turin, ItalyUniv San Luis Potosi, Fac Med, San Luis Potosi, MexicoUniv Alicante, Fac Med, E-03080 San Juan Alicante, SpainEUROTOX, Beecles, Suffolk, EnglandUniv Chile, Fac Med, Santiago 7, ChileUniv Aguascalientes, Ctr Basic Sci, Aguascalientes, MexicoUniv Surrey, Sch Biol Sci, Guildford GU2 5XH, Surrey, EnglandIPN, Natl Sch Biol Sci, Mexico City, DF, MexicoUNAM, Dept Genet Toxicol, Inst Biomed Invest, Mexico City, DF, MexicoUniv Bosque, Fac Med, Santafe Bogota, ColombiaUniv Nuevo Leon, Fac Med, Dept Pharmacol & Toxicol, Monterrey, NL, MexicoUniv Padua, Inst Occupat Med, Padua, ItalyAlbores, A, Cinvestav IPN, Sect Toxicol Ambiental, Dept Farmacol & Toxicol, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Structural improvement of higher education in environmental toxicology in Latin America and Europe AB - Industrial development has resulted in an increased release of chemicals and other agents into the environment, resulting in damage to the environment as well as increasing the risk of adverse effects on human health. Environmental toxicology (ET) is the discipline responsible for assessing the risks to human health and the environment from the effects of new chemicals and those already present in the environment. The development of human resources in toxicology is therefore a priority in both Latin America (LA) and the European Union (EU), although LA professionals are more involved in risk evaluation than in risk assessment compared to their EU colleagues. A solid background in general toxicology will enable those interested in environmental issues to tackle local problems. Moreover, the increasing globalization of markets and, therefore, of the necessary regulations, requires harmonisation of postgraduate programmes to ensure that risk assessment and management related to the environment are dealt with uniformly and by highly qualified scientists. The Inaugural Meeting of the ALFA-OMET Toxicology', a 2-year programme supported by the European Commission, offered the opportunity to discuss a number of these issues. The present status of existing ET courses in the EU and LA. and the corresponding professional profiles in the two regions were examined, and a harmonized academic curriculum for a postgraduate professional profiles in the two regions were examined, and a harmonized academic curriculum for a postgraduate course in environmental toxicology was developed. Finally, a course programme for toxicology and a specialization in environmental toxicology designed by a panel of experts was discussed, and its relevance as a model for other specialisation programmes was analysed. Exercises such as those performed by ALFA-OMET may be useful not only in promoting discussion for the implementation of national and international professional registers in LA, but also in encouraging the same, ongoing process in the EU. (C) 2000 Elsevier Science Ireland Ltd. FLU rights reserved MH - Chile MH - Colombia MH - United Kingdom MH - Germany MH - Italy MH - Mexico|Aguascalientes MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|San Luis Potosi MH - Spain PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Article AV - English IS - 0378-4274 UR - ISI:000084794400003 L2 - academic harmonization;environmental toxicology;higher education programmes;postgraduate education;professional registration SO - Toxicology Letters 2000 ;111(3):203-211 66 UI - 16054 AU - Alcala JM AU - Covino E AU - Sterzik MF AU - Schmitt JHMM AU - Krautter J AU - Neuhauser R AD - Osservatorio Astron Capodimonte, I-80131 Naples, ItalyEuropean So Observ, Santiago 19, ChileHamburger Sternwarte, D-21029 Hamburg, GermanyLandessternwarte Konigstuhl, D-69117 Heidelberg, GermanyMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyInst Nacl Astrofis Opt & Elect, Puebla, MexicoAlcala, JM, Osservatorio Astron Capodimonte, I-80131 Naples, Italy TI - A ROSAT pointed observation of the Chamaeleon II dark cloud AB - A deep 13.5 ksec ROSAT PSPC pointed observation in the Chamaeleon II (Cha II) cloud is reported. 40 X-ray sources are detected of which 14 can be identified with previously known young stellar objects (YSOs), namely IRAS sources, classical T Tauri stars and weak T Tauri stars. From spectroscopic followup observations, four new weak T Tauri candidates have been found. The X-ray sources are mainly located on the north-east of the cloud and their spatial distribution follows the lanes of the 100 mu m dust emission. Their X-ray properties are similar to those of low-mass PMS stars. None of the protostar candidates in Cha II has been detected in the ROSAT pointed observation, in agreement with the ASCA observations results. The X-ray detection rates indicate that the weak T Tauri stars (WTTS) are less numerous than the classical T Tauri stars (CTTS), contrarily to the findings in Chamaeleon I (Cha I) and other star forming regions where the WTTS may outnumber the CTTS. The latter result could be a consequence of the fact that Cha II is in an earlier evolutionary stage as compared to Cha I, as conjectured by previous studies. The Cha II young stellar objects (YSOs) are, on the average, slightly less X-ray luminous than those in Cha I, but the normalised X-ray luminosity distribution functions of the two regions are not significantly different MH - Chile MH - Germany MH - Italy MH - Mexico|Puebla PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000086869000025 L2 - surveys;stars : formation;stars : low-mass;stars : pre-main sequence;ISM : individual objects : Chamaeleon clouds;X-rays : stars;T-TAURI STARS; MAIN-SEQUENCE STARS; ALL-SKY SURVEY; X-RAY OBSERVATIONS; CHAMELEON-II; STELLAR POPULATION; FORMING REGION; HR DIAGRAM; IDENTIFICATION; ASSOCIATION SO - Astronomy and Astrophysics 2000 ;355(2):629-638 67 UI - 16640 AU - Alcala JM AU - Covino E AU - Torres G AU - Sterzik MF AU - Pfeiffer MJ AU - Neuhauser R AD - Osservatorio Astron Capodimonte, I-80131 Naples, ItalyHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAEuropean So Observ, Santiago 19, ChileUniv Munich, Inst Astron & Astrophys, D-81679 Munich, GermanyInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyAlcala, JM, Osservatorio Astron Capodimonte, I-80131 Naples, Italy TI - High-resolution spectroscopy of ROSAT low-mass pre-main sequence stars in Orion AB - High-resolution spectroscopic observations of the lithium-rich stars found on the basis of the ROSAT: All-Sky Survey (RASS) in the general direction of the Orion star forming region are presented. Different properties are derived from the spectra and analyzed: i) the equivalent widths of the lithium 6708 Angstrom absorption line have been measured and a revision of spectral types has been performed: ii) radial velocities (RV) and projected rotational velocities, v sin i, have been derived by application of cross-correlation techniques. A relatively large number of spectroscopic binaries and of suspected spectroscopic binary and multiple systems are found among the stars in the sample. Based on the strength of the lithium line with respect to young open cluster ZAMS stars of the same spectral type, the pre-main sequence nature is confirmed for more than 70% of the stars in the sample. The interrelation of the derived observational properties, such as kinematics, lithium abundance, age and projected rotational velocity of the stars in the sample are analyzed also in connection with the spatial location of the objects. In particular, the comparison between the kinematics of the stars and that of the gas, provided by the CO and CS molecular emission observations, reveals different degrees of clustering of the stars with respect to the cloud material and different kinematical groups can be distinguished. The sample of RASS lithium-rich stars found in the general direction of Orion appears to be a mixture of true Orion stars and, possibly, stars belonging to the Gould Belt MH - Chile MH - Germany MH - Italy MH - Mexico|Puebla MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 28 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000084835500021 L2 - stars : low-mass, brown dwarfs;stars : pre-main sequence;stars : rotation;techniques : radial velocities;techniques : spectroscopic;X-rays : stars;T-TAURI STARS; EMISSION-LINE STARS; SOLAR-TYPE STARS; ALL-SKY SURVEY; X-RAY OBSERVATIONS; RADIAL-VELOCITIES; MOLECULAR CLOUDS; FORMING REGION; OB ASSOCIATION; DARK CLOUD SO - Astronomy & Astrophysics 2000 ;353(1):186-202 68 UI - 15553 AU - Alcocer L AU - Reyes AJ AU - Velasco M AD - Gen Hosp, Mexico City, DF, MexicoInst Cardiovasc Theory, Montevideo, UruguayCent Univ Caracas, Vargas Med Sch, Dept Pharmacol, Caracas, Venezuela TI - Positive response of cognitive function to calcium antagonists MH - Mexico|Distrito Federal MH - Uruguay MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0263-6352 UR - ISI:000087593800548 SO - Journal of Hypertension 2000 ;18():S160-S160 69 UI - 14823 AU - Aleshkevich V AU - Kartashov Y AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, RussiaUAEM, CIICAp, Cuernavaca 62210, Morelos, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Vorobiovy Gory, Moscow 119899, Russia TI - Cnoidal waves compression by means of multisoliton effect AB - We consider the self-compression of the cnoidal waves of both cn- and dn-types in the materials with focusing Kerr nonlinearity. The dependencies of the compression degree and optimal media length on the parameter describing localisation of the wave energy are presented and the main features of the wave propagation are analysed on the basis of finite number harmonic approximation. (C) 2000 Elsevier Science B.V, All rights reserved MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000165417300010 L2 - self-compression;cnoidal waves;optical solitons;OPTICAL FIBERS; MODULATION; SOLITONS SO - Optics Communications 2000 ;185(4-6):305-314 70 UI - 16549 AU - Aleshkevich V AU - Vysloukh V AU - Kartashov Y AD - Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, RussiaUAEM, CIICAp, Cuernavaca 62210, Morelos, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Vorobiovy Gory, Moscow 119899, Russia TI - Self-bending of cnoidal waves in photorefractive medium with drift and diffusion nonlinearity AB - We consider the influence of the nonlocal component of the photorefractive crystal response on the cnoidal waves propagation dynamic and analyze the dependence of the self-bending parameter on the degree of the spatial localization of the wave energy. We have shown that for the case of the cn-wave the role of self-bending effects increases (and for the case of the dn-wave decreases) with growth of spatial localization. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000085132600035 L2 - spatial solitons;photorefractive medium;nonlocal nonlinear response;cnoidal waves;SCHRODINGER-EQUATION; OPTICAL FIBERS; CRYSTALS; SOLITONS SO - Optics Communications 2000 ;174(1-4):277-284 71 UI - 15870 AU - Alexandrova L AU - D'yachenko OG AU - Kazankov GM AU - Polyakov VA AU - Samuleev PV AU - Sansores E AU - Ryabov AD AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaDI Mendeleev Moscow Univ Chem Technol, Moscow 125820, RussiaRyabov, AD, Carnegie Mellon Univ, Dept Chem, 4400 5th Ave, Pittsburgh, PA 15213 USA TI - Mechanism of biologically relevant deoxygenation of dimethyl sulfoxide coupled with Pt(II) to Pt(IV) oxidation of orthoplatinated oximes. Synthetic, kinetic, electrochemical, X-ray structural, and density functional study AB - Orthometalated aryl oxime complexes cis-(C,S)-[Pt-II(C6H3-2-CMe=NOH-5-R)Cl(Me2S=O)] (1, R = H (a), MeO, Me, F, and Cl) undergo deoxygenation of dimethyl sulfoxide (DMSO) in methanol in the presence of HCl to afford the Pt(IV) dimethyl sulfide complexes fac-[Pt-IV(C6H3-2-CMe=NOH-5-R)Cl-3(Me2S)] (2), the composition of which was confirmed by an X-ray structural study of 2a. The mechanism of the deoxygenation coupled with the oxidation of Pt(II) to Pt(IV) was investigated using cyclic voltammety, UV-vis, and H-1 NMR spectrometry techniques at 40-60 degrees C in the presence of HCl, LiCl, and NaClO4. The conversion of 1 into 2 does not occur intramolecularly and involves two time-resolved phases which were studied independently. The first is the substitution of chloride for DMSO to afford the anionic reactive complexes cis-[Pt(C6H3-2-CMe=NOH-5-R)Cl-2](-) (1(Cl)), which are involved in the acid-promoted interaction with free DMSO in the second phase. The formation of 1(Cl) follows the usual two-term rate law k(obs1) + k(s) + k(Cl)[LiCl], the kcl-driven pathway being negligible for the electron-rich complex with R = MeO. Thus-generated complexes 1(Cl) in contrast to their precursors 1, are more susceptible to oxidation, and the irreversible peak for 1(Cl) E(p1), is observed ca. 300 mV more cathodically compared to that of i. The second phase is acid-catalyzed and at low LiCl concentrations follows the rate expression k(obs2)[H+](-1) = k(10)' + k(10)[LiCl]. The complexes with the electron-withdrawing substituents R react faster, and there is a linear correlation between log k(10) and E(p1). The first-order in the acid is discussed in terms of two kinetically indistinguishable mechanisms involving the rate-limiting either electron transfer from Icl to protonated DMSO (mechanism 1) or insertion of the S=O bond of free DMSO into the platinum-hydride bond of the reactive hydride complex of Pt(IV), cis-[Pt(C6H3-2-CMe=NOH)(H)Cl-2], to afford a {Pt-SMe2-OH} fragment. Its protonation by HCl and dissociation of water fives the final product 2 (mechanism 2). H-1 NMR evidence is presented for the formation of the hydride species on protonation of a Pt(II) complex, whereas a density functional study of the two mechanisms indicates that mechanism 2 is less energy demanding. The system studied is viewed as a functioning mimetic of the Mo-dependent enzyme DMSO reductase because of several common features observed in catalysis MH - Mexico|Distrito Federal MH - USA MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000087559700020 L2 - EFFECTIVE CORE POTENTIALS; PLATINUM(II) COMPLEXES; MOLECULAR CALCULATIONS; CRYSTAL-STRUCTURES; METAL-COMPLEXES; METHYL(HYDRIDO)PLATINUM(IV) COMPLEXES; DIMETHYLSULFOXIDE REDUCTASE; REACTIVITY; LIGANDS; ION SO - Journal of the American Chemical Society 2000 ;122(21):5189-5200 72 UI - 15318 AU - Alfaro EJ AU - Moreno E AU - Franco J AD - CSIC, Inst Astrofis Andalucia, Granada, SpainUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoAlfaro, EJ, CSIC, Inst Astrofis Andalucia, Apartado 3004, Granada, Spain TI - Kinematics of Gould's belt: Model and observations AB - Using the available data for nearby stars we derive the velocity ellipsoid of dwarf O-B5.5 stars belonging to the Gould Belt (GB). The resulting vertex deviation for the whole sample is negative (l(v) approximate to -70 degrees) and this value is modified to l(v) approximate to 20 degrees when the members of the Pleiades moving group are removed from the sample. This implies the existence of, at least, two different kinematic groups defining the GB system. We also model the evolution of a supershell in the solar neighborhood, and obtain a fit to the shape and kinematics of the gas in GB. Assuming that the expanding shell is also forming stars, we obtain the corresponding velocity fields for the shell and its newly formed stars. The average vertex deviation value resulting from these models for the new stars is l(v) approximate to 20 degrees, and is consistent with the observed value when the Pleiades moving group members are excluded from the GB MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000089142200008 L2 - HIPPARCOS DATA; MOVING GROUPS; STARS; IDENTIFICATION; SAMPLE; GAS SO - Astrophysics and Space Science 2000 ;272(1-3):53-59 73 UI - 16391 AU - Alfaro J AU - Morales-Tecotl HA AU - Urrutia LF AD - Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, ChileUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Dept Fis Atlas Energias, Mexico City 04510, DF, MexicoAlfaro, J, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 22, Chile TI - Quantum gravity corrections to neutrino propagation AB - Massive spin-1/2 fields are studied in the framework of loop quantum gravity by considering a state approximating, at a length scale L much greater than Planck length ep, a spin-1/2 field in flat spacetime. The discrete structure of spacetime at ep yields corrections to the field propagation at scale L. Neutrino bursts ((p) over bar approximate to 10(5) GeV) accompanying gamma ray bursts that have traveled cosmological distances L are considered. The dominant correction is helicity independent and leads to a time delay of order ((p) over bar lp)L/c approximate to 10(4) s. To next order in (p) over bar lp, the correction has the form of the Gambini and Pullin effect for photons. A dependence L-os(-1) proportional to (p) over bar(2)lp is found for a two-flavor neutrino oscillation length MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 144 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085791900009 L2 - GAMMA-RAY BURSTS; SPIN DYNAMICS QSD; ENERGY NEUTRINOS; FIELD THEORIES; WEAVE STATES; CONSTRAINT; FERMIONS SO - Physical Review Letters 2000 ;84(11):2318-2321 74 UI - 15337 AU - Algin A AU - Arik M AU - Atakishiyev NM AD - Osmangazi Univ, Dept Phys, Meselik, Eskisehir, TurkeyBogazici Univ, Dept Phys, Istanbul, TurkeyUniv Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62191, Morelos, MexicoFeza Gursey Inst, TR-81220 Istanbul, TurkeyAlgin, A, Osmangazi Univ, Dept Phys, Meselik, Eskisehir, Turkey TI - SU(d)-invariant multidimensional q-oscillators with bosonic degeneracy AB - Multidimensional two-parameter (q(1),q(2))-oscillators are of two kinds: one is invariant under the (ordinary) Lie group SU(d), whereas the other is invariant under the quantum group SUq(d) where q = q(1)/q(2). It is shown that the q(1) = q(2) limit of both of these two-parameter oscillators coincide and give the q-deformed Newton oscillator which can be derived from the standard quantum harmonic oscillator Newton equation. The bosonic degeneracies of the excited levels of these oscillators are different for q(1) not equal q(2), but coincide in the q(1) = q(2) limit MH - Mexico|Morelos MH - Turkey PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000089044200003 L2 - HARMONIC-OSCILLATOR SO - Modern Physics Letters A 2000 ;15(19):1237-1242 75 UI - 15100 AU - Ali ST AU - Atakishiyev NM AU - Chumakov SM AU - Wolf KB AD - Concordia Univ, Dept Math & Stat, Montreal, PQ H4B 1R6, CanadaUNAM, Inst Matemat, Cuernavaca, Morelos, MexicoUniv Guadalajara, Dept Ciencias Basicas, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAli, ST, Concordia Univ, Dept Math & Stat, Montreal, PQ H4B 1R6, Canada TI - The Wigner function for general Lie groups and the wavelet transform AB - We build Wigner maps, functions and operators on general phase spaces arising from a class of Lie groups, including non-unimodular groups (such as the affine group). The phase spaces are coadjoint orbits in the dual of the Lie algebra of these groups and they come equipped with natural symplectic structures and Liouville-type invariant measures. When the group admits square-integrable representations, we present a very general construction of a Wigner function which enjoys all the desirable properties, including full covariance and reconstruction formulae. We study in detail the case of the affine group on the line. In particular, we put into focus the close connection between the well-known wavelet transform and the Wigner function on such groups MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 25 U4 - Physics, Multidisciplinary;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 1424-0637 UR - ISI:000089774700004 L2 - COHERENT STATES; SYSTEMS; OPTICS SO - Annales Henri Poincare 2000 ;1(4):685-714 76 UI - 15583 AU - Alieva T AU - Wolf KB AD - Ctr Int Ciencias, Cuernavaca 62210, Morelos, MexicoWolf, KB, Eindhoven Univ Technol, Fac Elektrotech, POB 513, NL-5600 MB Eindhoven, Netherlands TI - Finite mode analysis through harmonic waveguides AB - The mode analysis of signals in a multimodal shallow harmonic waveguide whose eigenfrequencies are equally spaced and finite can be performed by an optoelectronic device, of which the optical part uses the guide to sample the wave field at a number of sensors along its axis and the electronic part computes their fast Fourier transform. We illustrate this process with the Kravchuk transform. (C) 2000 Optical Society of America [S0740-3232(00)00408-7] MH - Mexico|Morelos MH - Netherlands PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000088342200015 L2 - FOURIER-TRANSFORM SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(8):1482-1484 77 UI - 15911 AU - Allen LH AU - Rosado JL AU - Casterline JE AU - Lopez P AU - Munoz E AU - Garcia OP AU - Martinez H AD - Univ Calif Davis, Dept Nutr, Program Int Nutr, Davis, CA 95616, USAInst Nacl Nutr, Detp Fisiol Nutr, Tlalpan, MexicoNatl Publ Hlth Inst, Mexican Social Secur Inst, Interinst Hlth Serv Res Grp, Cuernavaca, Morelos, MexicoAllen, LH, Univ Calif Davis, Dept Nutr, Program Int Nutr, 1 Shields Ave, Davis, CA 95616 USA TI - Lack of hemoglobin response to iron supplementation in anemic Mexican preschoolers with multiple micronutrient deficiencies AB - Background: In developing countries, incomplete resolution of anemia with iron supplementation is often attributed to poor compliance or inadequate duration of supplementation, but it could result from deficiencies of other micronutrients. Objective: Our objective was to assess children's hematologic response to supervised, long-term iron supplementation and the relation of this response to other micronutrient deficiencies, anthropometry, morbidity, and usual dietary intake. Design: Rural Mexican children aged 18-36 mo (n = 219) were supplemented for 12 mo with either 20 mg Fe, 20 mg Zn, both iron and zinc, or placebo. Children were categorized as iron-unsupplemented (IUS; n = 109) or iron supplemented (IS; n = 108). Hemoglobin, hematocrit, mean corpuscular volume, mean cell hemoglobin, plasma concentrations of micronutrients that can affect hematopoiesis, anthropometry, and diet were assessed at 0, 6, and 12 mo; morbidity was assessed biweekly. Results: At baseline, 70% of children had low hemoglobin (less than or equal to 115 g/L), 60% had low hematocrit, 48% were ferritin deficient, 10% had deficient and 33% had low plasma vitamin B-12 concentrations, 29% had deficient vitamin A concentrations, and 70% had deficient vitamin E concentrations. Iron supplementation increased ferritin from 11 +/- 14 mu g/L at baseline to 31 +/- 18 mu g/L after 6 mo (P < 0.001) and 41 +/- 17 mu g/L after 12 mo. How ever, anemia persisted in 30% and 31% of supplemented children at 6 and 12 mo, respectively, and was not significantly different between the IUS and IS groups at 12 mo. Initial plasma vitamin B-12, height-for-age, and dietary quality predicted the hematopoietic response to iron. Conclusion: Lack of hemoglobin response to iron was associated with indicators of chronic undernutrition and multiple micronutrient deficiencies MH - USA MH - Mexico|Morelos MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 34 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000087426300017 L2 - iron supplementation;anemia;iron deficiency;vitamin B-12;retinol;tocopherol;anthropometry;dietary quality;children;micronutrient deficiencies;hemoglobin response;Mexico;VITAMIN-A; PREDICTED PREVALENCE; VILLAGE POPULATIONS; CHILDREN; WOMEN; RIBOFLAVIN; INFANTS; MEN; INADEQUACY; TODDLERS SO - American Journal of Clinical Nutrition 2000 ;71(6):1485-1494 78 UI - 15237 AU - Alonso C AU - Andrade C AU - Castellote M AU - Castro P AD - CSIC, Inst Construct Sci Eduardo Torroja, Madrid 28033, SpainIPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97310, Yucatan, MexicoAlonso, C, CSIC, Inst Construct Sci Eduardo Torroja, C Serrano Galvache S-N, Madrid 28033, Spain TI - Chloride threshold values to depassivate reinforcing bars embedded in a standardized OPC mortar AB - The chloride threshold to develop active corrosion of the reinforcing steel does not seem to be a unique value and it depends on several factors, such as concrete mix proportions, cement type, C(3)A content of cement, blended materials, water/cement ratio, temperature, relative humidity, steel surface conditions and source of chloride penetration among others. Numerous studies have been already devoted to the study of the chloride threshold value for depassivation of the steel embedded in concrete. One of the reasons found for the scatter is the large number of variables that influence the chloride amount for depassivation. The other reason is the lack of accordance for the definition of the chloride threshold itself, either on the determining parameters (visual observation, corrosion potential or corrosion current) or on the expression of the threshold (as Cl-/OH- ratio or by weight of cement or concrete). The present paper presents chloride thresholds that were studied in mortar based on corrosion current measurements and expressed as total, free and Cl-/OH- ratio. For this study, mainly smoothed bars were used, but also some ribbed bars were tested. Chloride thresholds in the range of 1.24-3.08% and 0.39-1.16%, by weight of cement, for total and free chlorides, respectively, and in the range of 1.17-3.98 for Cl-/OH- ratio were found for chlorides admired in the mixing water Active corrosion is considered when, in a small exposed area, the corrosion rate of the rebar is higher than 0.1 mu A/cm(2). The threshold in the case of Cl-/OH- results a bit higher than that found in a previous work for synthetic pore solution, although the two types of data can be fitted together finding a good correlation. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Yucatan MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 48 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-8846 UR - ISI:000089442800006 L2 - chloride;threshold;corrosion;reinforcement;corrosion rate;PORE SOLUTION CHEMISTRY; CONTAMINATED CONCRETE; CORROSION; STEEL; CEMENT SO - Cement and Concrete Research 2000 ;30(7):1047-1055 79 UI - 16295 AU - Alonso G AU - Petranovskii V AU - del Valle M AU - Cruz-Reyes J AU - Licea-Claverie A AU - Fuentes S AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoCtr Invest Mat Avanzados, Chihuahua, Chih, MexicoUniv Autonoma Baja California, Fac Ciencias Quim, Tijuana, BC, CanadaInst Tecnol, Grad Ctr, Tijuana, BC, CanadaFuentes, S, Inst Mexicano Petr, Eje Cent L Cardenas 152,Apdo Postal 14-805, Mexico City 07730, DF, Mexico TI - Preparation of WS2 catalysts by in situ decomposition of tetraalkylammonium thiotungstates AB - Tungsten tetraalkylammonium thiosalts are used as precursors for the in situ formation of WS2 catalysts in dibenzothiophene (DBT) hydrodesulfurization. The thermal decomposition of alkyl-ammonium thiosalts proceeds directly to WS2 without WS3 formation, as in the case of ammonium thiotungstate (ATT), allowing good control of the catalyst's stoichiometry, The alkyl-ammonium thiosalts give WS2 particles with different characteristic morphologies. The hydrodesulfurization (HDS) activities of WS2 catalysts derived from alkylthiosalts are higher than those of catalysts derived from the ammonium thiosalt, The reaction rate increases with the size of the cation in the precursor. No correlation of catalytic activities with surface areas is found. The S/W and C/W surface ratios determined by Auger electron spectroscopy decrease with increasing cation size. Surface composition is WS2.25C1.7, WS1.7 C-0.9 and WS1.3 C-0.7 for the in situ catalysts derived from ammonium, methylammonium, and butylammonium precursors, respectively. The improved catalytic properties of WS2 catalysts derived from alkylammonium thiosalts in the HDS of DBT are attributed to the formation of carbon-containing tungsten sulfide phases on the catalyst's surface. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Chihuahua MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000086192900011 L2 - WS2;tetraalkylammonium thiosalts;in situ activation;hydrodesulfurization;TUNGSTEN SULFIDE CATALYSTS; EX AMMONIUM TETRATHIOMOLYBDATE; OXYGEN; HYDRODESULFURIZATION; THIOMOLYBDATES; ALKANES; CARBIDE; CO SO - Applied Catalysis A-General 2000 ;197(1):87-97 80 UI - 15718 AU - Alonso MA AD - Macquarie Univ, Dept Phys, Sydney, NSW 2109, AustraliaAlonso, MA, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, AC, Ctr Int Ciencias, APO 48-3, Cuernavaca 62251, Morelos, Mexico TI - Measurement of Helmholtz wave fields AB - A simple formalism is found for the measurement of wave fields that satisfy the Helmholtz equation in free space. This formalism turns out to be analogous to the well-known theory of measurements for quantum-mechanical wave functions: A measurement corresponds to the squared magnitude of the inner product (in a suitable Hilbert space) of the wave field and a field that is associated with the detector. The measurement can also be expressed as an overlap in phase space of a special form of the Wigner function that is tailored for Helmholtz wave fields. (C) 2000 Optical Society of America [S0740-3232(00)00906-6] OCIS codes: 040.0040, 030.5630, 030.1670, 260.0260, 350.7420 MH - Australia MH - Mexico|Morelos PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000087895600013 L2 - WIGNER DISTRIBUTION FUNCTION SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(7):1256-1264 81 UI - 15861 AU - AlSunaidi A AU - Lach-hab M AU - Blaisten-Barojas E AU - Gonzalez AE AD - George Mason Univ, Sch COmputat Sci, Fairfax, VA 22030, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAlSunaidi, A, George Mason Univ, Sch COmputat Sci, Fairfax, VA 22030 USA TI - Colloidal aggregation with mobile impurities AB - The structure and aggregation kinetics of diffusion-limited cluster-cluster three-dimensional monomeric aggregates and gels is investigated as a function of the molar fraction of two types of impurities. In one case the impurities are allowed to aggregate among themselves whereas in the other the impurities are mobile monomers that remain as such during the whole aggregation process. Computer simulations are performed on a simple cubic lattice for which the functionality of the aggregating particles is effectively 6. The first type of impurity shows a decrease in the fractal dimension when compared to that of a one component system at the same concentration. As a consequence of this decrease, the gelation concentration is lowered, At higher concentrations a gelling to nongelling transition was observed. In the nongelling regime the colloidal aggregates are kept apart by the impurity clusters, developing a local ordering. For the monomeric type of impurity, at large impurity molar fractions, a nonstructured nongelling phase appears at high enough concentration, in which the colloidal aggregates are kept apart by the sea of mobile impurities that inhibits the formation of a gel. Smaller molar fractions of mobile monomeric impurities strongly affect both the fractal dimension and the kinetics of the aggregating colloid MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000087575400017 L2 - SELF-SIMILARITY; SCATTERING; DIFFUSION; CRYSTALLIZATION; SIMULATIONS; DEPENDENCE; AEROGELS; NEUTRON; MODEL; PHASE SO - Physical Review e 2000 ;61(6):6781-6788 82 UI - 16612 AU - AlSunaidi A AU - Lach-hab M AU - Gonzalez AE AU - Blaisten-Barojas E AD - George Mason Univ, Inst Computat Sci & Informat, Fairfax, VA 22030, USAUniv Maryland, Inst Phys Sci & Technol, College Pk, MD 20742, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAlSunaidi, A, George Mason Univ, Inst Computat Sci & Informat, Fairfax, VA 22030 USA TI - Cluster-cluster aggregation in binary mixtures AB - The structure and aggregation kinetics of three-dimensional clusters composed of two different monomeric species at three concentrations are thoroughly investigated by means of extensive, large-scale computer simulations. The aggregating monomers have all the same size and occupy the cells of a cubic lattice,Two;bonding schemes are considered: (a) the binary diffusion-limited cluster-cluster aggregation (BDLCA) in-which only the monomers of different species stick together, and (b) the invading binary diffusion-limited cluster-cluster aggregation (IBDLCA)in which additionally monomers of one of the two species are allowed to bond. In the two schemes, the mixed aggregates display self-similarity with a fractal dimension d(f) that depends on the relative molar fraction of the two species and on concentration. At a given concentrating when this molar fraction is small, df approaches a value close to the reaction-limited cluster-cluster aggregation of one component systems, and when the molar fraction is 0.5, df becomes close to the value of the diffusion-limited cluster-cluster aggregation model. The crossover between these two regimes is due to a time-decreasing reaction probability between colliding particles, particularly at small molar fractions. Several dynamical quantities are studied as a function of time. The number of clusters and the weight-average cluster size display a power-law behavior only at small concentrations. The dynamical exponents are obtained for molar fractions above 0.3 but not at or below 0.2, indicating the presence of a critical transition between a gelling to a nongelling system. The cluster-size distribution function presents scaling for molar fractions larger than 0.2. PACS number(s): 61.43.Hv, 82.70.Dd, 82.70.Gg, 05.10.Ln MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000084935200073 L2 - COLLOIDAL AGGREGATION; LIMITED AGGREGATION; SELF-SIMILARITY; HETEROCOAGULATION SO - Physical Review e 2000 ;61(1):550-556 83 UI - 16525 AU - Altamirano MM AU - Blackburn JM AU - Aguayo C AU - Fersht AR AD - Cambridge Ctr Prot Engn, Cambridge CB2 2QH, EnglandUniv Cambridge, Chem Lab, MRC Ctr, Cambridge CB2 2QH, EnglandNatl Autonomous Univ Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoFersht, AR, Cambridge Ctr Prot Engn, Hills Rd, Cambridge CB2 2QH, England TI - Directed evolution of new catalytic activity using the alpha/beta-barrel scaffold (Retracted article. See vol 417, pg 468, 2002) AB - In biological systems, enzymes catalyse the efficient synthesis of complex molecules under benign conditions, but widespread industrial use of these biocatalysts depends crucially on the development of new enzymes with useful catalytic functions. The evolution of enzymes in biological systems often involves the acquisition of new catalytic or binding properties by an existing protein scaffold. Here we mimic this strategy using the most common fold in enzymes, the alpha/beta-barrel, as the scaffold. By combining an existing binding site for structural elements of phosphoribosylanthranilate with a catalytic template required for isomerase activity, we are able to evolve phosphoribosylanthranilate isomerase activity from the scaffold of indole-3-glycerolphosphate synthase, We find that targeting the catalytic template for in vitro mutagenesis and recombination, followed by in vivo selection, results in a new phosphoribosylanthranilate isomerase that has catalytic properties similar to those of the natural enzyme, with an even higher specificity constant. Our demonstration of divergent evolution and the widespread occurrence of the alpha/beta-barrel suggest that this scaffold may be a fold of choice for the directed evolution of new biocatalysts MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: MACMILLAN MAGAZINES LTD RP - NOT IN FILE U3 - TC 122 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000085288200041 L2 - PHOSPHORIBOSYL ANTHRANILATE ISOMERASE; INDOLEGLYCEROL-PHOSPHATE SYNTHASE; IN-VITRO RECOMBINATION; MUCONATE LACTONIZING ENZYME; BETA-SHEET BARRELS; ESCHERICHIA-COLI; MOLECULAR EVOLUTION; BIFUNCTIONAL ENZYME; TRYPTOPHAN BIOSYNTHESIS; MANDELATE RACEMASE SO - Nature 2000 ;403(6770):617-622 84 UI - 14298 AU - Alvarado E AU - Torres-Martinez LM AU - Fuentes AF AU - Quintana P AD - IPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, VenezuelaUANL, DES, Fac Ciencias Quim, Monterrey, NL, MexicoQuintana, P, IPN, CINVESTAV, Unidad Merida, Km 6 Antigua Carretera Progreso, Merida 97310, Yucatan, Venezuela TI - Preparation and characterization of MgO powders obtained from different magnesium salts and the mineral dolomite AB - The characterisation of the physical properties of MgO powders, obtained from three commercial magnesium compounds, MgSO4. 7H(2)O, MgNO3. 6H(2)O and Mg(CH3CO(2))(2). 4H(2)O and the mineral dolomite (natural source from Mexico), synthesised by chemical precipitation, is presented. The decomposition of the precipitated Mg(OH)(2) was analysed by DTA/TGA and the crystallisation process was observed by XRD. The variation of the properties with the nature of the precursors at 960 degreesC was studied: as the crystallite size, density, specific surface area, degree of agglomeration, and the total porosity. The microstructural differences between the MgO agglomerates were examined by SEM, at different temperatures. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000166064800015 L2 - magnesia;dolomite;crystallite size;degree of agglomeration;X-ray diffraction;SEM;EVAPORATIVE DECOMPOSITION SO - Polyhedron 2000 ;19(22-23):2345-2351 85 UI - 15759 AU - Alvarez F AU - Villalobos JL AU - Iliffe TM AD - Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USAAlvarez, F, Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Naushonia manningi, new species (Decapoda : Thalassinidea : Laomediidae), from Acklins Island, Bahamas AB - A new species of the rare laomediid genus Naushonia, N. manningi, is described from a cave in Acklins Island. Bahamas. Naushonia manningi represents the seventh species of the genus and the first one to come from a cave. A key to the species of Naushonia is presented MH - Mexico|Distrito Federal MH - USA PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000087883000020 SO - Journal of Crustacean Biology 2000 ;20(2):192-198 86 UI - 14231 AU - Alvarez J AU - Orlov I AU - Acho L AD - Sci Res & Adv Studies Ctr, Elect & Telecommun Dept, Ensenada, Baja California, MexicoUniv Autonoma Baja California, Fac Ingn, Ensenada, Baja California, MexicoAlvarez, J, CICESE Res Ctr, Dept Elect, POB 434944, San Diego, CA 92143 USA TI - An invariance principle for discontinuous dynamic systems with application to a Coulomb friction oscillator AB - An invariance principle for a class of ordinary differential equations with discontinuous right-hand side is developed. Based on this principle, asymptotic stability of one-degree-of-freedom mechanical oscillators which Coulomb friction is studied. The system is shown to be asymptotically stabilizable via a static feedback of the position, unlike those systems with no friction, whose stabilization requires a dynamic feedback when the position is the only available measurement. Along with this development, a velocity observer is proposed. Theoretical results of the paper are supported by some numerical simulations which, in addition, carry out a finite-time convergence of the controller and the observer proposed. [S0022-0434(00)00804-2] MH - Mexico|Baja California MH - USA PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 17 U4 - Automation & Control Systems;Instruments & Instrumentation U5 - J;Article AV - English IS - 0022-0434 UR - ISI:000167109200017 L2 - FEEDBACK SO - Journal of Dynamic Systems Measurement and Control-Transactions of the Asme 2000 ;122(4):687-690 87 UI - 16183 AU - Amigo MC AU - Khamashta MA AD - Univ Nacl Autonoma Mexico, Dept Rheumatol, Inst Nacl Cardiol Ignacio Chavez, Mexico City 14080, DF, MexicoUnited Med & Dent Sch Guys & St Thomas Hosp, St Thomas Hosp, London SE1 7EH, EnglandUnited Med & Dent Sch Guys & St Thomas Hosp, Guys Hosp, London SE1 9RT, EnglandSt Thomas Hosp, Rayne Inst, Lupus Res Unit, London, EnglandAmigo, MC, Univ Nacl Autonoma Mexico, Dept Rheumatol, Inst Nacl Cardiol Ignacio Chavez, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Antiphospholipid (Hughes) syndrome in systemic lupus erythematosus AB - The antiphospholipid (Hughes) syndrome (APS) was initially described in connection with SLE. It occurs in approximately 30% of patients with SLE. Clinical features and aPL specificities are similar between the primary and secondary forms of APS. The clinical course of the secondary syndrome is independent of the activity and severity of lupus, but the presence of the APS worsens the prognosis of patients with lupus. Treatment of the APS remains empirical and directed at coagulation mechanisms and immune mechanisms because of the limited amount of controlled prospective data MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 23 U4 - Rheumatology U5 - J;Article AV - English IS - 0889-857X UR - ISI:000086361900008 L2 - THROMBOEMBOLIC PULMONARY-HYPERTENSION; LOW-DOSE ASPIRIN; ANTICARDIOLIPIN ANTIBODIES; VENOUS THROMBOSIS; SYNDROME PAPS; DISEASE; ANTICOAGULANT; PREGNANCY; CRITERIA; HEPARIN SO - Rheumatic Disease Clinics of North America 2000 ;26(2):331-+ 88 UI - 16485 AU - Amigo V AU - Ortiz JL AU - Salvador MD AD - UPV, Dept Ingn Mecan & Mat, Valencia 46022, SpainITESM, Dept Ingn Mecan & Ind, Santiago De Queretaro 76130, MexicoAmigo, V, UPV, Dept Ingn Mecan & Mat, Camino Vera S-N, Valencia 46022, Spain TI - Microstructure and mechanical behavior of 6061Al reinforced with silicon nitride particles, processed by powder metallurgy MH - Mexico|Queretaro MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000085431900011 L2 - extrusion;powder consolidation;aluminium;aging;MATRIX COMPOSITES; AGING BEHAVIOR; PARTICULATE COMPOSITES; TENSILE PROPERTIES; SIC/AL COMPOSITES; TEMPERATURE; PRECIPITATION; ALUMINUM; SIZE SO - Scripta Materialia 2000 ;42(4):383-388 89 UI - 13029 AU - Amorin H AU - Portelles J AU - Guerrero F AU - Fundora A AU - Siqueiros-Beltrones JM AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv La Habana, Fac Fis, Inst Mat & React, Havana 10400, CubaUniv Oriente, Fac Ciencias Nat, Santiago De Cuba 90500, CubaSiqueiros-Beltrones, JM, UNAM, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - Diffuse phase transition in the (La0.03Sr0.255Ba0.7)(Nb2-yTiy)O-6.y/2 ferroelectric ceramic system AB - The effect of the titanium cation as a doping element in the diffuse phase transition of the (Sr0.255La0.03Ba0.7)(Nb2-yTiy)O6-y/2 ferroelectric ceramic system is studied. Far from the transition temperature, a Curie-Weiss behavior of the dielectric permittivity with temperature is observed with strongly broadened curves in all cases, however, a non Curie-Weiss behavior above the transition temperature is observed. The diffuseness coefficient (delta) was calculated using Isupov's relation and by a more realistic model assuming a Gaussian distribution for the transition temperatures, in a temperature interval around the maximum permittivity temperature. The conditions under which each expression can be used are discussed MH - Cuba MH - Mexico|Baja California PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000170518300009 L2 - ferroelectric ceramics;diffuse phase transition;modified Sr1-xBaxNb2O6 system;STRONTIUM BARIUM NIOBATE; GLASSY POLARIZATION; BEHAVIOR SO - Ferroelectrics 2000 ;248(1-4):97-106 90 UI - 15354 AU - Amorin H AU - Portelles J AU - Guerrero F AU - Fundora A AU - Martinez E AU - Siqueiros JM AD - Univ Havana, Fac Fis, Inst Mat & Reactivos, Havana 10400, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Oriente, Fac Ciencias Nat, Santiago 90500, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoAmorin, H, Univ Havana, Fac Fis, Inst Mat & Reactivos, San Lazaro & L Vedado, Havana 10400, Cuba TI - Formation of the La0.03Sr0.255Ba0.7Nb2-yTiyO6-y/2 ferroelectric ceramic system AB - The study of the formation of the Sr0.255La0.03Ba0.7Nb2 - yTiyO6 - y/2 ferroelectric ceramic system and the influence of the sintering conditions and titanium concentration on the densification process is reported. A single-phase compound is observed for low titanium content (y less than or equal to 0.1) in the XRD spectra, being isostructural with the tetragonal tungsten bronze SBN phase. For high titanium concentrations (y > 0.1) the XRD patterns show, besides the tetragonal phase reflections, several small peaks evidencing an additional phase in the compound. This second phase was identified as isostructural to hexagonal Ba6Nb9Ti7O42. The grain size shows a linear increase with titanium content in the region of monophasic compositions and a possible liquid phase aided sintering process is analyzed. (C) 2000 Kluwer Academic Publishers MH - Cuba MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000088984000017 L2 - STRONTIUM BARIUM NIOBATE; DIELECTRIC-PROPERTIES; DETECTORS; CRYSTALS SO - Journal of Materials Science 2000 ;35(18):4607-4613 91 UI - 16519 AU - Amorin H AU - Portelles J AU - Guerrero F AU - Perez J AU - Siqueiros JM AD - Univ La Habana, Fac Fis, IMRE, Havana 10400, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Oriente, Fac Ciencias Nat, Santiago De Cuba 90500, CubaAmorin, H, Univ La Habana, Fac Fis, IMRE, Havana 10400, Cuba TI - Dielectric hysteresis and pyroelectricity in the La0.03Sr0.255Ba0.7Nb2-yTiyO(6-y)/2 ferroelectric ceramic system AB - The dielectric hysteresis and pyroelectric properties of the La0.03Sr0.255Ba0.7Nb2-yTiyO(6-y)/2 (LSBNT) ceramic system were studied for different Nb/Ti concentrations. For dielectric hysteresis measurements at room temperature, the remanent polarization increases and the: coercive field decreases with titanium concentration for an applied electric field of 20 kV/cm. The thermally stimulated current measurements show the pyroelectric peak for all compositions while a second smaller peak at higher temperature, possibly associated with induced vacancy-impurity dipoles, is also observed in all cases. The second peak contribution was mathematically eliminated to determine the remanent polarization and pyroelectric coefficient, both associated only with permanent ferroelectric dipoles. In this case, the remanent polarization decreased with the rise in titanium concentration. The La0.03Sr0.255Ba0.7Nb1.95Ti0.05O5.975 sample, in particular, has excellent pyroelectric response, making this material very suitable for pyroelectricity-derived applications. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000085275400009 L2 - ferroelectronics;chemical synthesis;dielectric response;MODIFIED SR0.5BA0.5NB2O6; DETECTORS; CRYSTALS SO - Solid State Communications 2000 ;113(10):581-585 92 UI - 14964 AU - Anderson ARA AU - Chaplain MAJ AU - Garcia-Reimbert C AU - Vargas CA AD - Univ Dundee, Dept Math, Dundee DD1 4HN, ScotlandUniv Nacl Autonoma Mexico, IIMAS, FENOMEC, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, IIMAS, Dept Matemat & Mecan, Mexico City 01000, DF, MexicoAnderson, ARA, Univ Dundee, Dept Math, Dundee DD1 4HN, Scotland TI - A gradient-driven mathematical model of antiangiogenesis AB - In this paper, we present a mathematical model describing the angiogenic response of endothelial cells to a secondary tumour. It has been observed experimentally that while the primary tumour remains in situ, any secondary tumours that may be present elsewhere in the host can go undetected, whereas removal of the primary tumour often leads to the sudden appearance of these hitherto undetected metastases-so-called occult metastases. In this paper, a possible explanation for this suppression of secondary tumours by the primary tumour is given in terms of the presumed migratory response of endothelial cells in the neighbourhood of the secondary tumour. Our model assumes that the endothelial cells respond chemotactically to two opposing chemical gradients: a gradient of tumour angiogenic factor, set up by the secretion of angiogenic cytokines from the secondary tumour; and a gradient of angiostatin, set up in the tissue surrounding any nearby vessels. The angiostatin arrives there through the blood system (circulation), having been originally secreted by the primary tumour. This gradient-driven endothelial cell migration therefore provides a possible explanation of how secondary tumours (occult metastases) can remain undetected in the presence of the primary tumour yet suddenly appear upon surgical removal of the primary tumour. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000165051800006 L2 - antiangiogenesis;angiostatin;endothelial cells;tumour angiogenic factors;chemotaxis;TUMOR-RELATED ANGIOGENESIS; ENDOTHELIAL-CELLS; METASTASIS; GROWTH; NEOVASCULARIZATION; PROLIFERATION; ANGIOSTATIN; MECHANISMS; INHIBITOR; INVASION SO - Mathematical and Computer Modelling 2000 ;32(10):1141-1152 93 UI - 16260 AU - Andrade E AU - Garcia VM AU - Nair PK AU - Nair MTS AU - Zavala EP AU - Huerta L AU - Rocha MF AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98600, GuadeloupeUniv Nacl Autonoma Mexico, Inst Politecn Nacl, Escuela Super Ingn Mecan Elect, Mexico City 07738, DF, MexicoAndrade, E, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Ion beam analysis of copper selenide thin films prepared by chemical bath deposition AB - Analyses of Rutherford back scattered (RBS) He-4(+)-particle spectra of copper selenide thin films deposited on glass slides by chemical bath were carried out to determine the changes brought about in the thin him by annealing processes. The atomic density per unit area and composition of the films were obtained from these measurements. This analysis shows that annealing in a nitrogen atmosphere at 400 degrees C leads to the conversion of CuxSe thin film to Cu2Se. Results of X-ray diffraction, optical, and electrical characteristics on the films are presented to supplement the RBS results. (C) 2000 Elsevier Science B.V. All rights reserved MH - Guadeloupe MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000086204100120 L2 - IBA techniques;chemical composition;X-ray diffractometry;thin film growth;chemical deposition SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2000 ;161():635-640 94 UI - 15941 AU - Andrade L AU - Caraveo-Anduaga JJ AU - Berglund P AU - Bijl R AU - Kessler RC AU - Demler O AU - Walters E AU - Kylyc C AU - Offord D AU - Ustun TB AU - Wittchen HU AD - Harvard Univ, Sch Med, Dept Hlth Care Policy, Boston, MA 02115, USAMexican Inst Psychiat, Mexico City, DF, MexicoUniv Michigan, Ann Arbor, MI 48109, USANetherlands Inst Mental Hlth & Addict, Utrecht, NetherlandsHacettepe Univ, Sch Med, Ankara, TurkeyChedoke McMaster Hosp, Hamilton, ON, CanadaWHO, ACE, CH-1211 Geneva, SwitzerlandMax Planck Inst Psychiat, D-8000 Munich, GermanyUniv Sao Paulo, Sao Paulo, BrazilKessler, RC, Harvard Univ, Sch Med, Dept Hlth Care Policy, 180 Longwood Ave, Boston, MA 02115 USA TI - Cross-national comparisons of the prevalences and correlates of mental disorders AB - The International Consortium in Psychiatric Epidemiology (ICPE) was established in 1998 by WHO to carry out cross-national comparative studies of the prevalences and correlates of mental disorders. This article describes the findings of ICPE surveys in seven countries in North America (Canada and USA), Latin America (Brazil and Mexico), and Europe (Germany, Netherlands, and Turkey), using a version of the WHO Composite International Diagnostic Interview (CIDI) to generate diagnoses. The results are reported using DSM-III-R and DSM-IV criteria without diagnostic hierarchy rules for mental disorders and with hierarchy rules for substance-use disorders. Prevalence estimates varied widely - from >40% lifetime prevalence of any mental disorder in Netherlands and the USA to levels of 12% in Turkey and 20% in Mexico. Comparisons of lifetime versus recent prevalence estimates show that menta I disorders were often ch ron ic, although chronicity was consistently higher for anxiety disorders than for mood or substance-use disorders. Retrospective reports suggest that mental disorders typically had early ages of onset, with estimated medians of 15 years for anxiety disorders, 26 years for mood disorders, and 21 years for substance-use disorders. All three classes of disorder were positively related to a number of socioeconomic measures of disadvantage (such as low income and education, unemployed, unmarried). Analysis of retrospective age-of-onset reports suggest that lifetime prevalences had increased in recent cohorts, but the increase was less for anxiety disorders than for mood or substance-use disorders. Delays in seeking professional treatment were widespread, especially among early-onset cases, and only a minority of people with prevailing disorders received any treatment. Mental disorders are among the most burdensome of all classes of disease because of their high prevalence and chronicity, early age of onset, and resulting serious impairment. There is a need for demonstration projects of early outreach and intervention programmes for people with early-onset mental disorders, as well as quality assurance programmes to look into the widespread problem of inadequate treatment MH - Brazil MH - Canada MH - Germany MH - USA MH - Mexico|Distrito Federal MH - Netherlands MH - Switzerland MH - Turkey PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 106 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000087313700003 L2 - mental disorders, epidemiology;psychiatric status rating scales;cross-cultural comparison;cross-sectional studies;North America;Latin America;Europe;CHRISTCHURCH PSYCHIATRIC EPIDEMIOLOGY; INTERNATIONAL DIAGNOSTIC INTERVIEW; UNITED-STATES; SOCIAL-CONSEQUENCES; LIFETIME PREVALENCE; COMORBIDITY-SURVEY; TREATMENT CONTACT; MAJOR DEPRESSION; MEDICAL OUTCOMES; HEALTH SO - Bulletin of the World Health Organization 2000 ;78(4):413-426 95 UI - 14978 AU - Anglada G AU - Rodriguez LF AU - Torrelles JM AD - CSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, IEEC, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainAnglada, G, CSIC, Inst Astrofis Andalucia, Camino Bajo Huetor 24, E-18008 Granada, Spain TI - Discovery of a subarcsecond radio binary associated with the SVS 13 star in the HH 7-11 region AB - We report the discovery of a double radio continuum source (VLA 4A and 4B) associated with the optically visible star SVS 13. The two components of the radio source are separated by 0".3, corresponding to a projected separation of 65 AU for a distance of 220 pc. We propose that the radio sources trace the components of a binary system. The observed separation implies a lower limit of similar to 135 yr for the orbital period, for a binary system with a total mass of 2 M-.. We suggest that, as in other pre-main-sequence binaries, the two components of the system could be in different evolutionary stages and/or suffer from different extinction, with the more extincted object being associated with the previously reported millimeter source, while the other component would correspond to the visible star SVS 13. Since an increase in the optical/near-infrared brightness of the SVS 13 star was observed around 1990, we speculate that such flux variations could be due to the reappearance of the optical component previously occulted by the circumstellar envelope/disk of dust associated with the millimeter component. The observed separation implies a radius of similar to 60 AU for the presumed dust envelope and suggests an orbital period of similar to 1700 yr and a duration of the occultation of similar to 185 yr. We expect that other subarcsecond binary systems, which remain unresolved, could present an anomalous behavior that may be explained by assuming the presence of a binary system whose components are in different evolutionary stages and/or suffer from different extinction MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165095700012 L2 - ISM : individual (HH 7-11);ISM : jets and outflows;radio continuum : ISM;stars : formation;stars : individual (SVS 13);HERBIG-HARO OBJECTS; T-TAURI STARS; INFRARED COMPANION; EXCITING SOURCE; NGC-1333; OUTBURST; SSV-13; HH7-11; DISKS; FLOW SO - Astrophysical Journal 2000 ;542(2):L123-L126 96 UI - 16662 AU - Angulo Y AU - Olamendi-Portugal T AU - Possani LD AU - Lomonte B AD - Univ Costa Rica, Fac Microbiol, Inst Clodomiro Picado, Escuela Med, San Jose, Costa RicaUniv Costa Rica, Escuela Med, Dept Bioquim, San Jose, Costa RicaNatl Autonomous Univ Mexico, Inst Biotecnol, Dept Mol Recognit & Struct Biol, Cuernavaca, Morelos, MexicoLomonte, B, Univ Costa Rica, Fac Microbiol, Inst Clodomiro Picado, Escuela Med, San Jose, Costa Rica TI - Isolation and characterization of myotoxin II from Atropoides (Bothrops) nummifer snake venom, a new Lys49 phospholipase A(2) homologue AB - Myotoxic phospholipases A(2) Of class II are commonly found in: the venoms of crotalid snakes. As an approach to understanding their structure-activity relationship, diverse natural variants: have been characterized biochemically and pharmacologically. This study describes a new myotoxic phospholipase Az homologue, isolated from the venom of Atropoides (Bothrops) nummifer from Costa Rica, A. nummifer myotoxin II is a basic protein, with an apparent subunit molecular mass of 16 kDa, which migrates as a dimer in sodium dodecylsulfate-polyacrylamide gel electrophoresis under nonreducing conditions. It is strongly recognized by antibodies generated against Bothrops asper:myotoxin II, by enzyme-immunoassay. The toxin induces rapid myonecrosis upon intramuscular injection in mice (evidenced by an early increase in plasma creatine kinase activity), and significant edema in the footpad assay. It also displays cytolytic activity upon cultured murine endothelial cells, The toxin (up to 50 mu g) has no detectable phospholipase A(2) activity on egg yolk phospholipids, and does not show an anticoagulant effect on sheep platelet-poor plasma in vitro. N-terminal sequence determination (53 amino acid residues) demonstrated that A. nummifer myotoxin II is a new Lys49 variant of the family of myotoxic, class II phospholipases A(2). Sequence comparison with other phospholipases A(2) revealed Asn53 as a novel substitution. In addition, this myotoxin is the first Lys49 variant presenting Asn in its N-terminus. Consequently, these findings suggest that neither Ser1 or Lys53, usually found in this family of proteins, are essential amino acid residues for their myotoxic, cytolytic, or edema-inducing effects. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Costa Rica MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1357-2725 UR - ISI:000084663800006 L2 - snake venom;myotoxin;phospholipase A(2);Atropoides nummifer;Bothrops;AMINO-ACID-SEQUENCE; LYSINE-49 PHOSPHOLIPASE-A(2); ASPER TERCIOPELO; COSTA-RICA; IDENTIFICATION; CALCIUM; PROTEIN; CLONING; BINDING; REGION SO - International Journal of Biochemistry & Cell Biology 2000 ;32(1):63-71 97 UI - 16441 AU - Anikiev VV AU - Dudarev OV AU - Said MA AU - Botsul AI AU - Utkin IV AU - Shumilin EN AD - Russian Natl Ecol Safety Comm, Moscow 101000, RussiaPacific Oceanol Inst, Vladivostok 690041, RussiaEgyptian Acad Sci, Oceanog & Fishery Natl Inst, Alexandria, EgyptLa Paz Marine Ctr, La Paz 23000, MexicoAnikiev, VV, Russian Natl Ecol Safety Comm, Ul Lubyanka 10, Moscow 101000, Russia TI - Natural and anthropogenic factors in the lateral distribution of the particulate material and chemical elements in water of the Nile river foredelta and adjacent area of the Mediterranean Sea MH - Egypt MH - Mexico|Baja California Sur MH - Russia PB - MOSCOW: ROSSIISKAYA AKADEMIYA NAUK RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - Russian IS - 0016-7525 UR - ISI:000085353400007 L2 - EGYPTIAN COAST; HEAVY-METALS; BEHAVIOR; ESTUARY; FE; MN; ZN; CU SO - Geokhimiya 2000 ;(1):78-91 98 UI - 15324 AU - Aposhian HV AU - Zheng BS AU - Aposhian MM AU - Le XC AU - Cebrian ME AU - Cullen W AU - Zakharyan RA AU - Ma HS AU - Dart RC AU - Cheng Z AU - Andrewes P AU - Yip L AU - O'Malley GF AU - Maiorino RM AU - Van Voorhies W AU - Healy SM AU - Titcomb A AD - Univ Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USAAcad Sinica, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R ChinaUniv Alberta, Fac Med & Dent, Dept Publ Hlth Sci, Edmonton, AB T6G 2G3, CanadaInst Politecn Nacl, CINVESTAV, Secc Toxicol Ambientale, Mexico City 07000, DF, MexicoUniv British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, CanadaRocky Mt Poison & Drug Control Ctr, Denver, CO 80220, USAW China Univ Med Sci, Dept Epidemiol, Shenyang 110001, Liaoning, Peoples R ChinaAposhian, HV, Univ Arizona, Dept Mol & Cellular Biol, LSS Bldg,Room 444,POB 210106, Tucson, AZ 85721 USA TI - DMPS - Arsenic Challenge Test II. Modulation of arsenic species, including monomethylarsonous acid (MMA(III)), excreted in human urine AB - The administration of sodium 2,3-dimercapto-1-propane sulfonate (DMPS) to humans chronically exposed to inorganic arsenic in their drinking water resulted in the increased urinary excretion of arsenic, the appearance and identification of monomethylarsonous acid (MMA(III)) in their urine, and a large decrease in the concentration and percentage of urinary dimethylarsinic acid (DMA). This is the first time that MMA(III) has been detected in the urine. In vitro biochemical experiments were then designed and performed to understand the urinary appearance of MMA(III) and decrease of DMA. The DMPS-MMA(III) complex was not active as a substrate for the MMA(III) methyltransferase. The experimental results support the hypothesis that DMPS competes with endogenous ligands for MMA(III), forming a DMPS-MMA complex that is readily excreted in the urine and points out the need for studying the biochemical toxicology of MMA(III). It should be emphasized that MMA(III) was excreted in the urine only after DMPS administration. The results of these studies raise many questions about the potential central role of MMA(III) in the toxicity of inorganic arsenic and to the potential involvement of MMA(III) in the Little-understood etiology of hyperkeratosis, hyperpigmentation, and cancer that can result from chronic inorganic arsenic exposure, (C) 2000 Academic Press MH - USA MH - Canada MH - Mexico|Distrito Federal MH - Peoples R China PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 61 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-008X UR - ISI:000089000900007 L2 - MMA(III);monomethylarsonous acid;arsenic biotransformation;DMPS;arsenic;ENZYMATIC METHYLATION; CHELATING-AGENTS; DRINKING-WATER; RABBIT LIVER; WELL-WATER; 2,3-DIMERCAPTOPROPANE-1-SULFONATE; METHYLTRANSFERASE; CARCINOGENESIS; SPECIATION; METABOLISM SO - Toxicology and Applied Pharmacology 2000 ;165(1):74-83 99 UI - 15415 AU - Aposhian HV AU - Gurzau ES AU - Le XC AU - Gurzau A AU - Healy SM AU - Lu XF AU - Ma MS AU - Yip L AU - Zakharyan RA AU - Maiorino RM AU - Dart RC AU - Tircus MG AU - Gonzalez-Ramirez D AU - Morgan DL AU - Avram D AU - Aposhian MM AD - Univ Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USACtr Environm Hlth, Cluj Napoca 3400, RomaniaUniv Alberta, Fac Med & Dent, Dept Publ Hlth Sci, Edmonton, AB T6G 2G3, CanadaRocky Mt Poison & Drug Control Ctr, Denver, CO 80220, USAState Sanitary Inspect Arad, Arad 2900, RomaniaInst Mexicano Seguro Social, Unidad Invest Biomed Noreste, Dept Farmacol, Monterrey 64720, Nuevo Leon, MexicoNIEHS, Toxicol Lab, Res Triangle Pk, NC 27709, USAAposhian, HV, Univ Arizona, Dept Mol & Cellular Biol, Life Sci S Bldg,Rm 444,POB 210106, Tucson, AZ 85721 USA TI - Occurrence of monomethylarsonous acid in urine of humans exposed to inorganic arsenic AB - Monomethylarsonous acid (MMA(III)) has been detected for the first time in the urine of some humans exposed to inorganic arsenic in their drinking water. Our experiments have dealt with subjects in Romania who have been exposed to 2.8, 29, 84, or 161 mu g of As/L in their drinking water. In the latter two groups, MMA(III) was 11 and 7% of the urinary arsenic while the monomethylarsonic acid (MMA(V)) was 14 and 13%, respectively. Of our 58 subjects, 17% had MMA(III) in their urine. MMA(III) was not found in urine of any members of the group with the lowest level of As exposure. If the lowest-level As exposure group is excluded, 23% of our subjects had MMA(III) in their urine. Our results indicate that (a) future studies concerning urinary arsenic profiles of arsenic-exposed humans must determine MMA(III) concentrations, (b) previous studies of urinary profiles dealing with humans exposed to arsenic need to be re-examined and re-evaluated, and (c) since MMA(III) is more toxic than inorganic arsenite, a re-examination is needed of the two hypotheses which hold that methylation is a detoxication process for inorganic arsenite and that inorganic arsenite is the major cause of the toxicity and carcinogenicity of inorganic arsenic MH - USA MH - Canada MH - Mexico|Nuevo Leon MH - Romania PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 119 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Toxicology U5 - J;Article AV - English IS - 0893-228X UR - ISI:000088951400002 L2 - ENZYMATIC METHYLATION; RABBIT LIVER; WEST-BENGAL; METHYLTRANSFERASE; WATER; TOXICITY SO - Chemical Research in Toxicology 2000 ;13(8):693-697 100 UI - 15089 AU - Arakeri JH AU - Avila FE AU - Dada JM AU - Tovar RO AD - Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, IndiaUNAM, Temixco, Ctr Invest Energia, Mexico City, DF, MexicoArakeri, JH, Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, India TI - Convection in a long vertical tube due to unstable stratification - A new type of turbulent flow? AB - We present experimental results of free convection in a vertical tube due to an unstable density difference imposed between the two (open) ends of the tube. Two tanks of fluids connect the two ends of the tube with the top-tank fluid heavier than the bottom-tank fluid. We use salt mixed with water to create the density difference. The convection in the tube is in the form of relatively heavier fluid going down and lighter fluid going up simultaneously; the mean flow at any cross section of the tube is zero. Depending on the Rayleigh number we observe different types of flow, with turbulent flow being observed at the higher Rayleigh numbers. We believe this is a new type of turbulent flow-a nearly homogeneous, buoyancy-driven flow with zero mean shear MH - India MH - Mexico|Distrito Federal PB - BANGALORE: CURRENT SCIENCE ASSN RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0011-3891 UR - ISI:000089776800030 L2 - INSTABILITY SO - Current Science 2000 ;79(6):859-866 101 UI - 16581 AU - Aramburo C AU - Luna M AU - Carranza M AU - Reyes M AU - Martinez-Coria H AU - Scanes CG AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, Qro, MexicoRutgers State Univ, Dept Anim Sci, New Brunswick, NJ 08903, USAAramburo, C, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus UNAM UAQ Juriquilla,Apdo Postal 1-1141, Queretaro 76001, Qro, Mexico TI - Growth hormone size variants: Changes in the pituitary during development of the chicken AB - There is considerable evidence for the existence of structural variants of growth hormone (GH). The chicken is a useful model for investigating GH heterogeneity as both size and charge immunoreactive-(ir) variants have been observed in the pituitary and plasma. The present study examined the size distribution of ir-GH in the pituitary gland of chicken, from late embryogenesis through adulthood. Pituitaries were homogenized in the presence of protease inhibitor, and the GH size variants were separated by SDS-PAGE, transferred by Western blotting, immunostained with a specific antiserum to chicken GH, and quantitated by chemiluminescence followed by laser densitometry (chemiluminescent assay). Under nonreducing conditions Ir-GH bands of 15, 22, 25, 44, 50, 66, 80, 98, 105 and >110 kDa were observed. Both the relative proportion of the GH sire variants and the total pituitary content varied with developmental stage and age. The proportion of the 15-kDa fragment was greatest in the embryonic stage, and then it decreased. The proportion of the monomeric 22-kDa form was lowest at 18 days of embryogenesis (dE) and highest at 20 dE. In contrast, the high MW forms (greater than or equal to 66 kDa) were lowest in embryos, and they increased (P < 0.05) after hatching. The 22-, 44-, 66-, and 80-kDa forms were assayed for activity by radio-receptor assay following isolation by semipreparative SDS-PAGE. Only the 22-kDa GH variant showed radioreceptor activity. Under reducing conditions for SDS-PAGE, ir-GH bands of 13, 15, 18, 23, 26, 36, 39, 44, 48, 59 and 72 kDa were oberved, but most of the high MW form disappeared. There was a concomitant increase in the proportion of the monomeric band and of several submonomeric forms. The present data indicate that the expression, processing, and/or release of some if not all size variants are under some differential control during growth and development of the chicken MH - Mexico|Queretaro MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 21 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0037-9727 UR - ISI:000084988300009 L2 - CGH CHARGE VARIANTS; BIOLOGICAL CHARACTERIZATION; IMMUNOLOGICAL PROPERTIES; NONGLYCOSYLATED FORMS; PROLACTIN; HETEROGENEITY; ISOFORMS; PROTEINS; ONTOGENY; RAT SO - Proceedings of the Society for Experimental Biology and Medicine 2000 ;223(1):67-74 102 UI - 15707 AU - Aranda JI AU - Martinez R AU - Sampayo OA AD - Univ Michoacana San Nicolas de Hidalgo, Escuela Ciencias Fidicomatemat, Morelia, Michoacan, MexicoUniv Nacl, Dept Fis, Bogota, ColombiaUniv Mar del Plata, Dept Fis, RA-7600 Mar Del Plata, ArgentinaAranda, JI, Univ Michoacana San Nicolas de Hidalgo, Escuela Ciencias Fidicomatemat, Morelia, Michoacan, Mexico TI - Limits on excited tau lepton masses from leptonic tau decays AB - We study the effects induced by excited leptons on the leptonic tau decay at the one loop level. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to the leptonic decays and use the current experimental values of the branching ratios to put limits on the mass of excited states and the substructure scale MH - Argentina MH - Colombia MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000087954100016 L2 - ROOT-S=161 GEV; COMPOSITENESS; PHYSICS; SEARCH; MOMENT SO - Physical Review D 2000 ;6201(1): 103 UI - 15940 AU - Arce H AU - Xu AX AU - Gonzalez H AU - Guevara MR AD - Natl Autonomous Univ Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, MexicoMcGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Ctr Nonlinear Dynam Physiol & Med, Montreal, PQ H3G 1Y6, CanadaArce, H, Natl Autonomous Univ Mexico, Fac Ciencias, Dept Fis, Apartado Postal 70-542, Mexico City 04510, DF, Mexico TI - Alternans and higher-order rhythms in an ionic model of a sheet of ischemic ventricular muscle AB - Life-threatening arrhythmias such as ventricular tachycardia and fibrillation often occur during acute myocardial ischemia. During the first few minutes following coronary occlusion, there is a gradual rise in the extracellular concentration of potassium ions ([K+](0)) within ischemic tissue. This elevation of [K+](0) is one of the main causes of the electrophysiological changes produced by ischemia, and has been implicated in inducing arrhythmias. We investigate an ionic model of a 3 cmx3 cm sheet of normal ventricular myocardium containing an ischemic zone, simulated by elevating [K+](0) within a centrally-placed 1 cmx1 cm area of the sheet. As [K+](0) is gradually raised within the ischemic zone from the normal value of 5.4 mM, conduction first slows within the ischemic zone and then, at higher [K+](0), an arc of block develops within that area. The area distal to the arc of block is activated in a delayed fashion by a retrogradely moving wavefront originating from the distal edge of the ischemic zone. With a further increase in [K+](0), the point eventually comes where a very small increase in [K+](0) (0.01 mM) results in the abrupt transition from a global period-1 rhythm to a global period-2 rhythm in the sheet. In the peripheral part of the ischemic zone and in the normal area surrounding it, there is an alternation of action potential duration, producing a 2:2 response. Within the core of the ischemic zone, there is an alternation between an action potential and a maintained small-amplitude response (similar to 30 mV in height). With a further increase of [K+](0), the maintained small-amplitude response turns into a decrementing subthreshold response, so that there is 2:1 block in the central part of the ischemic zone. A still further increase of [K+](0) leads to a transition in the sheet from a global period-2 to a period-4 rhythm, and then to period-6 and period-8 rhythms, and finally to a complete block of propagation within the ischemic core. When the size of the sheet is increased to 4 cmx4 cm (with a 2 cmx2 cm ischemic area), one observes essentially the same sequence of rhythms, except that the period-6 rhythm is not seen. Very similar sequences of rhythms are seen as [K+](0) is increased in the central region (1 or 2 cm long) of a thin strand of tissue (3 or 4 cm long) in which propagation is essentially one-dimensional and in which retrograde propagation does not occur. While reentrant rhythms resembling tachycardia and fibrillation were not encountered in the above simulations, well-known precursors to such rhythms (e.g., delayed activation, arcs of block, two-component upstrokes, retrograde activation, nascent spiral tips, alternans) were seen. We outline how additional modifications to the ischemic model might result in the emergence of reentrant rhythms following alternans. (C) 2000 American Institute of Physics. [S1054-1500(00)00102-6] MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 18 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Review AV - English IS - 1054-1500 UR - ISI:000087346300014 L2 - ACUTE MYOCARDIAL-ISCHEMIA; ACTION-POTENTIAL DURATION; T-WAVE ALTERNANS; PERIOD-DOUBLING BIFURCATIONS; ACUTE CORONARY-OCCLUSION; ACUTE REGIONAL ISCHEMIA; CARDIAC PURKINJE-FIBERS; PERFUSED PORCINE HEART; ELECTRICAL ALTERNANS; MECHANICAL ALTERNANS SO - Chaos 2000 ;10(2):411-426 104 UI - 15212 AU - Arceo LDB AU - Cruz-Rivera JJ AU - Cabanas-Moreno JG AU - Tsuchiya K AU - Umemoto M AU - Calderon H AD - Zacatenco Inst Politecn Nacl, ESIQIE, Mexico City 07300, DF, Mexico. Zacatenco Inst Politecn Nacl, UPALM, FM, Mexico City 07300, DF, Mexico. Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan TI - Characterization of Cu-Co alloys produced by mechanosynthesis and spark plasma sintering AB - Mechanical alloying and sintering by the spark plasma sintering technique have been used to obtain Cu-Co alloys. Microstructure characterization and measurement of magnetic properties are reported. The produced alloys contain 50, 66 and 75 at% Cu. They have been prepared from pure elemental powders in a high-energy planetary mill under an inert Ar atmosphere. Microstructure characterization of the as milled powders has been performed by X-ray diffraction and TEM methods. A supersaturated solid solution is found after 100hr of milling. Sintering produces grains of Cu containing a fine dispersion of Co particles. Similar X-ray diffraction patterns are produced by as milled powders and sintered products. However their magnetic response is different. The magnetic hysteresis curves are measured and important changes in coercive force and magnetization field are found as a function of Co content. Some changes have been observed between the powder and sintered specimens that support the results obtained by the magnetic hysteresis curves MH - Japan MH - Mexico|Distrito Federal T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMPart 1&2BQ75R AV - English IS - 0255-5476 UR - ISI:000089403900100 SO - 2000 ;():641-646 105 UI - 16625 AU - Archdeacon D AU - Colbourn CJ AU - Gitler I AU - Provan JS AD - Univ Vermont, Dept Math & Stat, Burlington, VT 05405, USAUniv Vermont, Dept Comp Sci, Burlington, VT 05405, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoUniv N Carolina, Chapel Hill, NC 27599, USAArchdeacon, D, Univ Vermont, Dept Math & Stat, Burlington, VT 05405, USA TI - Four-terminal reducibility and projective-planar wye-delta-wye-reducible graphs AB - A graph is Y Delta Y-reducible if it can be reduced to a vertex by a sequence of series-parallel reductions and Y Delta Y-transformations. Terminals are distinguished vertices, that cannot be deleted by reductions and transformations. In this article, we show that four-terminal planar graphs are Y Delta Y-reducible when at least three of the vertices lie on the same face. Using this result, we char acterize Y Delta Y-reducible projective-planar graphs. We also consider terminals in projective-planar graphs, and establish that graphs of crossing-number one are Y Delta Y-reducible. (C) 2000 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0364-9024 UR - ISI:000084904900003 L2 - reducible graphs;terminal;wye-delta;REDUCTION SO - Journal of Graph Theory 2000 ;33(2):83-93 106 UI - 15382 AU - arcon-Segovia D AU - Drenkard C AD - Inst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Cordoba, Cordoba, ArgentinaAlarcon-Segovia, D, Inst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - Vasculitis and the antiphospholipid syndrome MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Letter AV - English IS - 1462-0324 UR - ISI:000088892500019 L2 - SYSTEMIC LUPUS-ERYTHEMATOSUS SO - Rheumatology 2000 ;39(8):922-923 107 UI - 16003 AU - Arcos JA AU - Garcia HS AU - Hill CG AD - Univ Wisconsin, Dept Chem Engn, Madison, WI 53706, USAInst Tecnol Veracruz, Veracruz 91897, MexicoHill, CG, Univ Wisconsin, Dept Chem Engn, 1415 Johnson Dr, Madison, WI 53706 USA TI - Regioselective analysis of the fatty acid composition of triacylglycerols with conventional high-performance liquid chromatography AB - A new method for regioselective analysis of triacylglycerols via conventional high-performance liquid chromatography (HPLC) has been developed. The method is simple and avoids the time-consuming purification processes normally characteristic of regioselective analyses. The procedure utilizes an sn-1,3-specific lipase from Rhizopus arrhizus to deacylate the fatty acid residues located at the sn-l and sn-3 positions of triacylglycerols. The fatty acid residues esterified at the sn-2 position are determined by subtraction of the results of the sn-1,3 analysis from an overall composition analysis based on complete saponification of the original sample. The fatty acid mixtures are converted to p-bromophenacyl esters and analyzed using conventional HPLC techniques. The analytical procedure has been verified using a standard structured triacylglycerol. The analytical results for three edible vegetable oils are compared with those obtained via the method proposed by P.J. Williams and co-workers MH - USA MH - Mexico|Veracruz PB - CHAMPAIGN: AMER OIL CHEMISTS SOC A O C S PRESS RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0003-021X UR - ISI:000087004800008 L2 - high-performance liquid chromatography;regioselective analysis;Rhizopus arrhizus lipase;triacylglycerols;STEREOSPECIFIC ANALYSIS; TRIGLYCERIDE STRUCTURE; LIPASE; PHASE SO - Journal of the American Oil Chemists Society 2000 ;77(5):507-512 108 UI - 16052 AU - Arcos JA AU - Garcia HS AU - Hill CG AD - Univ Wisconsin, Dept Chem Engn, Madison, WI 53706, USAInst Tecnol Veracruz, Veracruz 91860, MexicoHill, CG, Univ Wisconsin, Dept Chem Engn, 1415 Engn Dr, Madison, WI 53706 USA TI - Continuous enzymatic esterification of glycerol with (poly)unsaturated fatty acids in a packed-bed reactor AB - Enzymatic synthesis of mono-, di-, and triacyglycerols from (poly)unsaturated fatty acids (linoleic, oleic, and conjugated linoleic acids) has been studied as a solvent-free reaction in a packed-bed reactor containing an immobilized lipase from Mucor miehei The extents of the esterification reactions of interest are primarily determined by the molar ratio of glycerol to fatty acid because the presence of excess glycerol as a immiscible phase is responsible for reducing the activity of the water produced by the esterification reactions. For molar ratios of fatty acid to glycerol of less than 1.5, the percentage of the fatty acid esterified decreases quasi-linearly with an increase in this molar ratio. By appropriate manipulation of the fluid-residence time, one can control the relative proportions of the various acylglycerols in the effluent stream. At the outlet of the reactor, one observes excellent spontaneous separation of the glycerol and acylglycerol/fatty acid phases. At 50 degrees C and a fluid residence time of 1 hour, as much as 90% of the fatty acid can be esterified when the molar ratio of fatty acid to glycerol is 0.33 or less. (C) 2000 John Wiley & Sons, Inc MH - USA MH - Mexico|Veracruz PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000086928600011 L2 - Mucor miehei lipase;conjugated linoleic acid;(poly)unsaturated fatty acids;synthesis of acylglycerols;(poly)esterification of glycerol;CONJUGATED LINOLEIC-ACID; LIPASES; WATER SO - Biotechnology and Bioengineering 2000 ;68(5):563-570 109 UI - 14920 AU - Ardila A AU - Ostrosky-Solis F AU - Mendoza VU AD - Inst Colombiano Neuropsicol, Bogota, ColombiaUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Colima, Colima, MexicoArdila, A, 12230 NW 8 St, Miami, FL 33182, USA TI - Learning to read is much more than learning to read: A neuropsychologically based reading program AB - Departing from the observation that illiterates significantly underscore in some neuropsychological tests, a learning-to-read method named NEUROALFA was developed. NEUROALFA is directed to reinforce these underscored abilities during the learning-to-read process. It was administered to a sample of 21 adult illiterates in Colima (Mexico). Results were compared with 2 control groups using more traditional procedures in learning to read. The NEUROPSI neuropsychological test battery was administered to all the participants before and after completing the learning-to-read training program. All 3 groups presented some improvement in the test scores. Gains, however, were significantly higher in the experimental group in Orientation in Time, Digits Backward, Visual Detection, Verbal Memory, Copy of a Semi-Complex Figure, Language Comprehension, Phonological Verbal Fluency, Similarities, Calculation Abilities, Sequences, and all the recall subtests, excluding Recognition. Performance in standard reading tests was also significantly higher in the experimental group. Correlations between pretest NEUROPSI scores and reading ability were low. However; correlations between posttest NEUROPSI scores and reading scores were higher and significant for several subtests. Results are interpreting as supporting the assumption that reinforcement of those abilities in which illiterates significantly underscore results in a significant improvement in neuropsychological test scores and strongly facilitates the learning-to-read process. The NEUROALFA method of teaching reading to adult illiterates is beginning to be used extensively in Mexico. To our knowledge, this is the first attempt to apply neuropsychological principles to social problems MH - Colombia MH - Mexico|Colima MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 10 U4 - Clinical Neurology;Neurosciences;Psychiatry;Psychology U5 - J;Article AV - English IS - 1355-6177 UR - ISI:000165133300006 L2 - illiteracy;reading;neuropsychological testing;cognitive abilities;BRAIN-DAMAGE; TEST-PERFORMANCE; INTELLIGENCE; ILLITERACY; ABILITIES; LITERACY; LANGUAGE SO - Journal of the International Neuropsychological Society 2000 ;6(7):789-801 110 UI - 15531 AU - Ardila A AU - Ostrosky-Solis F AU - Rosselli M AU - Gomez C AD - Florida Atlantic Univ, Coll Liberal Arts, Dept Psychol, Div Sci, Davie, FL 33314, USANatl Autonomous Univ Mexico, Mexico City, DF, MexicoRosselli, M, Florida Atlantic Univ, Coll Liberal Arts, Dept Psychol, Div Sci, 3912 Coll Ave, Davie, FL 33314 USA TI - Age-related cognitive decline during normal aging: The complex effect of education AB - The purpose of this study was to further analyze the effects of education on cognitive decline during normal aging An 806-subject sample was taken from five different Mexican regions. Participants ranged in age from 16 to 85 years. Subjects were grouped into four educational levels: illiterate, 1-4, 5-9, and 10 or more years of education, and four age ranges: 16-30,31-50, 51-65, and 66-85 years. A brief neuropsychological rest battery (NEUROPSI), standardized and normalized in Spanish, was administered. The NEUROPSI rest battery includes assessment of orientation, attention, memory, language, visuoperceptual abilities, motor skills, and executive functions. In general, test scores were strongly associated with level of educational, and differences among age groups were smaller than differences among education groups. However there was an interaction between age and education such as that among illiterate individuals scores of participants 31-50 years old were higher than scores of participants 16-30 years old for over 50% of the rests. Differ mt patterns of interaction among educational groups were distinguished. It was concluded that: (a) The course of life-span changes in cognition are affected by education. Among individuals with a low level of education, best neuropsychological test performance is observed at an older age than among higher-educated subjects; and (b) there is not a single relationship between age-related cognitive decline and education, but different patterns may be found, depending upon the specific cognitive domain. (C) 2000 National Academy of Neuropsychology. Published by Elsevier Science Ltd MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 39 U4 - Psychology, Clinical;Psychology U5 - J;Article AV - English IS - 0887-6177 UR - ISI:000088678600003 L2 - aging;neuropsychological testing;cognitive decline;educational effects;MENTAL-STATE-EXAMINATION; NEUROPSYCHOLOGICAL TEST BATTERY; ALZHEIMERS-DISEASE; VISUAL COMPLEXITY; IMAGE AGREEMENT; NAME AGREEMENT; DEMENTIA; LEVEL; POPULATION; PREVALENCE SO - Archives of Clinical Neuropsychology 2000 ;15(6):495-513 111 UI - 14493 AU - Arenillas I AU - Arz JA AD - Univ Zaragoza, Dept Ciencias Tierra Paleontol, E-50009 Zaragoza, SpainUniv Tubingen, Inst & Museum Geol & Palaontol, D-72076 Tubingen, GermanyUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares 67700, MexicoArenillas, I, Univ Zaragoza, Dept Ciencias Tierra Paleontol, E-50009 Zaragoza, Spain TI - Parvularugoglobigerina eugubina type-sample at Ceselli (Italy): Planktic foraminiferal assemblage and lowermost Danian biostratigraphic implications AB - The Parvularugoglobigerina eugubina Biozone (lowermost Danian) was defined at Gubbio (Italy) to precisely characterise the Cretaceous/Paleogene (WP) boundary. It was defined by the total range of Pv. eugubina, but this small morphospecies presents some taxonomic problems. The Pv. eugubina holotype and the planktic foraminiferal assemblage of the Pv. eugubina type-sample at Ceselli (Ceselli 3) were revised to precise the biostratigraphic posit ion of this biozone. Of the 21 morphospecies identified in Ceselli 3, 14 are early Paleocene species and 7 are possible Cretaceous "survivors" of the K/P boundary extinction event. To clarify the lowermost Danian biozonation, it was necessary to taxonomically revise Pv. eugubina and Pv. longiapertura, which have both been identified in this sample. Following the definition of Pv, eugubina and the original definition of the nominal biozone, the base of Pv. eugubina Biozone should be placed at the first appearance datum of the eponymous species and not at the first appearance datum of Pv. longiapertura MH - Germany MH - Mexico|Nuevo Leon MH - Spain PB - MILANO: UNIV STUDI MILANO RP - NOT IN FILE U3 - TC 5 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0035-6883 UR - ISI:000166376300008 L2 - planktic foraminifera;taxonomy;biostratigraphy;K/P boundary;Paleocene;Gubbio;CRETACEOUS-TERTIARY BOUNDARY; GLOBAL IMPLICATIONS; ANTARCTIC OCEAN; MASS EXTINCTION; TRANSITION; TRISERIAL; RADIATION; TURNOVER; BISERIAL; TUNISIA SO - Rivista Italiana di Paleontologia e Stratigrafia 2000 ;106(3):379-390 112 UI - 15468 AU - Arenillas I AU - Arz JA AU - Molina E AU - Dupuis C AD - Univ Zaragoza, Dept Ciencias Tierra, Area Paleontol, E-50009 Zaragoza, SpainUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares 67700, MexicoFac Polytech Mons, Lab Geol Fondamentale & Appl, B-7000 Mons, BelgiumArenillas, I, Univ Zaragoza, Dept Ciencias Tierra, Area Paleontol, E-50009 Zaragoza, Spain TI - The Cretaceous/Paleogene (K/P) boundary at Ain Settara, Tunisia: Sudden catastrophic mass extinction in planktic foraminifera AB - The quantitative study and high resolution sampling of an essentially continuous and expanded Cretaceous/Paleogene (K/P) boundary section in Tunisia allow us to test the model of extinction in planktic foraminifera. The extinction at the Ain Settara section occurred over a short period of time similar to the Tunisian sections at El Kef and Elles and the Spanish sections at Agost, Caravaca and Zumaya, At Ain Settara only 3 species disappeared in the latest Maastrichtian, 45 became extinct precisely at the Km boundary and 18 disappeared in the earliest Danian. The species that became extinct at the K/P boundary constitute about 20% of the individuals in the population larger than 63 microns and 68% of the species, which suddenly became extinct in a catastrophic event precisely coinciding with the layer containing evidence for an asteroid impact. Most of these species are large, complex and low latitude deeper to intermediate dwelling forms. This extinction event is clearly the most important catastrophic mass extinction recorded in the history of planktic foraminifera. This pattern of extinction is superimposed on a controversial gradual pattern of extinction of 21 species that apparently began in the latest Maastrichtian and ended in the early Danian, The Maastrichtian species that seem to become extinct gradually are generally small, cosmopolitan and simple surface dwellers. The catastrophic mass extinction of the 45 species coincident with the K/P boundary is compatible with the effect of the impact of a large asteroid, whereas the gradual extinction of 18 species in the basal Danian could also be attributed to the long term disruptive effect of the impact MH - Belgium MH - Mexico|Nuevo Leon MH - Spain PB - CAMBRIDGE: CUSHMAN FOUNDATION FORAMINIFERAL RES RP - NOT IN FILE U3 - TC 16 U4 - Paleontology U5 - J;Article AV - English IS - 0096-1191 UR - ISI:000088811700004 L2 - KEF BLIND TEST; TERTIARY BOUNDARY; EL-KEF; CRETACEOUS/TERTIARY BOUNDARY; ENVIRONMENTAL-CHANGES; SE SPAIN; TEST II; SURVIVORSHIP; CARAVACA; SECTIONS SO - Journal of Foraminiferal Research 2000 ;30(3):202-218 113 UI - 15954 AU - Arenillas I AU - Arz JA AU - Molina E AU - Dupuis C AD - Univ Zaragoza, Dept Ciencias Tierra Paleontol, E-50009 Zaragoza, SpainUniv Tubingen, Inst Museum Geol & Palaontol, D-72076 Tubingen, GermanyUniv Autonoma Neuvo Leon, Fac Ciencias Tierra, Linares 67700, MexicoFac Polytech Mons, Lab Geol Fondamentale & Appliquee, B-7000 Mons, BelgiumArenillas, I, Univ Zaragoza, Dept Ciencias Tierra Paleontol, E-50009 Zaragoza, Spain TI - An independent test of planktic foraminiferal turnover across the Cretaceous/Paleogene (K/P) boundary at El Kef, Tunisia: Catastrophic mass extinction and possible survivorship AB - Planktic foraminiferal biostratigraphy and assemblage turnover across the Cretaceous/Paleogene (WP) boundary at EI Kef revealed the largest and most abrupt extinction event in the history of planktic foraminifera. Cretaceous assemblages were very abundant and diverse and included 67 stable identified species within the terminal Maastrichtian. The mass extinction was characterized by the disappearance of 6 (8.9%) species in the last 12 meters of the upper Maastrichtian and the extinction of 46 (68.7%) species at the WP boundary as well as 15 (22.4%) possible survivors ranging into the lowermost Danian. The range of planktic foraminifera only based on six samples (equivalent to the previous El Kef blind sample test) showed an even more catastrophic extinction pattern, with only I species disappearing before the WP boundary. The WP debate is the result of several problems which include the "Signor-Lipps" effect, the possibility of reworking and the existence of hiatuses. However, irrespective of the different interpretations we conclude that there were no significant extinction nor quantitative changes before the WP boundary and that most Cretaceous species suddenly became extinct at the WP boundary. The El Kef section is one of the most continuous marine WP boundary sections known and hiatuses have not been identified. Furthermore, possible Cretaceous survivors had a smaller size and lower absolute abundance in the lower Danian than in the upper Maastrichtian and the planktic foraminiferal evolutionary radiation began above the WP boundary and not below. The same results have been found in other subtropical-temperate sections and may be sufficient proof for the existence of a catastrophic mass extinction at the WP boundary. The planktic foraminiferal WP extinction pattern is also very compatible with the catastrophic effects caused by the impact of a large extra-terrestrial asteroid MH - Belgium MH - Germany MH - Mexico|Nuevo Leon MH - Spain PB - NEW YORK: MICROPALEONTOLOGY PRESS RP - NOT IN FILE U3 - TC 17 U4 - Paleontology U5 - J;Article AV - English IS - 0026-2803 UR - ISI:000087269400002 L2 - BLIND TEST I; TERTIARY BOUNDARY; CRETACEOUS/TERTIARY BOUNDARY; GLOBAL IMPLICATIONS; ANTARCTIC OCEAN; BASQUE COUNTRY; HIGH-LATITUDES; CARAVACA; SPAIN; BIOSTRATIGRAPHY SO - Micropaleontology 2000 ;46(1):31-49 114 UI - 16374 AU - Arenillas I AU - Arz JA AU - Molina E AD - Univ Zaragoza, Dept Ciencias Tierra, ES-50009 Zaragoza, SpainUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, MEX-67700 Linares, NL, MexicoArenillas, I, Univ Zaragoza, Dept Ciencias Tierra, ES-50009 Zaragoza, Spain TI - Spanish and Tunisian Cretaceous/Tertiary boundary sections: A planktic foraminiferal biostratigraphic comparison and evolutionary events MH - Mexico|Nuevo Leon MH - Spain PB - UPPSALA: SWEDISH SCIENCE PRESS RP - NOT IN FILE U3 - TC 1 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 1103-5897 UR - ISI:000085853400004 L2 - EXTINCTION SO - Gff 2000 ;122():11-12 115 UI - 15651 AU - Arizaga S AU - Ezcurra E AU - Peters E AU - de Arellano FR AU - Vega E AD - Univ Nacl Autonoma Mexico, Inst Ecol, Morelia 58190, Michoacan, MexicoSan Diego Nat Hist Museum, Biodivers Res Ctr Californias, San Diego, CA 92112, USAArizaga, S, Univ Nacl Autonoma Mexico, Inst Ecol, Apartado Postal 27-3 Xangari, Morelia 58190, Michoacan, Mexico TI - Pollination ecology of Agave macroacantha (Agavaceae) in a Mexican tropical desert. I. Floral biology and pollination mechanisms AB - In a study of sexual reproduction in long-lived semelparous plants, we observed Agave macroacantha in the tropical desert of Tehuacan-Cuicatlan, Mexico, describing duration of flowering, flower phenology, and nectar production patterns. We also performed two manipulative experiments evaluating (a) the seed production efficiency of different crossing systems (selfing, cross-pollination. apomixis. and control), and (b) the effect of different pollinators (diurnal exposure to pollinators, nocturnal exposure, exclusion, and control) on the seeds produced. Flowering occurred from early May to late July and had a mean duration of 29 days in the individual rosettes. The flowers were protandrous; anthesis occurred in the afternoon of the third day after floral opening, and the pistils matured in the afternoon of the fifth day. The stigmas remained receptive from dusk to the following morning. Pollination was mostly allogamous. Nectar was produced principally during the night, from the first stages of floral aperture until the stigmas wilted and flowering ceased. The flowers were visited during the day by hymenoptera, butterflies, and hummingbirds and during the night by bats and moths. Only the nocturnal visitors, however, were successful pollinators. Agave macroacanthus is extremely dependent on nocturnal pollinators for its reproductive success MH - Mexico|Michoacan MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000088235300013 L2 - Agave macroacantha;Agavaceae;nectar;nectar-feeding bats;pollination biology;rosette plants;tropical deserts;BATS; NECTAR SO - American Journal of Botany 2000 ;87(7):1004-1010 116 UI - 15652 AU - Arizaga S AU - Ezcurra E AU - Peters E AU - de Arellano FR AU - Vega E AD - Univ Nacl Autonoma Mexico, Inst Ecol, Morelia 58190, Michoacan, MexicoSan Diego Nat Hist Museum, Biodivers Res Ctr Californias, San Diego, CA 92112, USAArizaga, S, Univ Nacl Autonoma Mexico, Inst Ecol, Apartado Postal 27-3 Xangari, Morelia 58190, Michoacan, Mexico TI - Pollination ecology of Agave macroacantha (Agavaceae) in a Mexican tropical desert. II. The role of pollinators AB - We did a series of observational studies and manipulative experiments on the guild of nocturnal visitors of Agave macroacantha, including (1) a description of the hourly patterns of visits by moths and bats, (2) an evaluation of the relative contribution of bats and moths to flowering success, and (3) an evaluation of the pollination efficiency of the different bar species. Scapes exposed to moths but excluded to bats yielded similar to 50% fewer fruits than those exposed to both pollinator groups. Flowers exposed to the bat species Leptonycteris curasoae showed similar fruiting success to those exposed to Choeronycteris mexicana and to those exposed to the whole nocturnal visitor guild. However, the fruits originated from flowers pollinated by Lepronycteris curasoae yielded significantly more seed than those exposed to Choeronycteris mexicana or to the whole pollinator guild. It is concluded that Agave macroocantha is extremely dependent on nocturnal pollinators for its reproductive success and that bats are especially important for successful pollination. Some of these pollinators are migratory and have been reported to be steadily declining. A continuing decline in the populations of pollinators may impede the successful sexual reproduction of the plant host and may put the long-term survival of this agave species under risk MH - Mexico|Michoacan MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000088235300014 L2 - Agave macroacantha;deserts;fruit set;Mexico;moths;nectar-feeding bats;pollination biology;pollinator effectiveness;rosette plants;NECTAR-FEEDING BATS SO - American Journal of Botany 2000 ;87(7):1011-1017 117 UI - 15748 AU - Arkin RC AU - Ali K AU - Weitzenfeld A AU - Cervantes-Perez F AD - Georgia Tech, Coll Comp, Atlanta, GA 30332, USAInst Technol Autonomo Mexico, Dept Acad Computac, Mexico City, DF, MexicoArkin, RC, Georgia Tech, Coll Comp, Atlanta, GA 30332, USA TI - Behavioral models of the praying mantis as a basis for robotic behavior AB - Formal models of animal sensorimotor behavior can provide effective methods for generating robotic intelligence. In this article we describe how schema-theoretic models of the praying mantis derived from behavioral and neuroscientific data can be implemented on a hexapod robot equipped with a real time color vision system. This implementation incorporates a wide range of behaviors, including obstacle avoidance, prey acquisition, predator avoidance, mating, and chantlitaxia behaviors that can provide guidance to neuroscientists, ethologists, and roboticists alike. The goals of this study are threefold: to provide an understanding and means by which fielded robotic systems are not competing with other agents that are more effective at their designated task; to permit them to be successful competitors within the ecological system and capable of displacing less efficient agents; and that they are ecologically sensitive so that agent-environment dynamics are well-modeled and as predictable as possible whenever new robotic technology is introduced. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Automation & Control Systems;Computer Science, Artificial Intelligence;Robotics U5 - J;Article AV - English IS - 0921-8890 UR - ISI:000087800700003 L2 - schema-based control;behavior-based robotics;praying mantis behavior;MOBILE ROBOT; NAVIGATION; MECHANISMS; SCHEMA; SYSTEM SO - Robotics and Autonomous Systems 2000 ;32(1):39-60 118 UI - 15660 AU - Armaroli T AU - Trombetta M AU - Alejandre AG AU - Solis JR AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyUNAM, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, MexicoArmaroli, T, Univ Genoa, Dipartimento Ingn Chim & Proc, P JF Kennedy, I-16129 Genoa, Italy TI - FTIR study of the interaction of some branched aliphatic molecules with the external and internal sites of H-ZSM5 zeolite AB - The interaction of the branched molecules pivalonitrile (2,2-dimethylpropionitrile, PN), methyl tert-butyl ether (MTBE), tert-butyl alcohol (TBA), and 2,2-dimethylbutane (DMB), as well as of methylcyclohexane, benzonitrile and benzene over different H-ZSM5 zeolite samples was investigated by FTIR spectroscopy. PN does not enter the cavities of MFI structures at room temperature and 0-25 Torr pressure, at least when Al content is quite high. Also, TBA and MTBE do not enter the cavities under these conditions although isobutene produced by their decomposition, easily enters and polymerizes in the internal acidic sites. Conversely, DMB slowly enters the MFI zeolite cavities. On the other hand, the co-presence of benzene allows PN to enter the cavities and to interact with the internal sites. This shows that the access of single molecules can be influenced by other molecules in a mixture. The experiments also confirmed that two kinds of terminal silanol groups, indistinguishable from the point of view of the OH stretching band but differing in their Bronsted acidity, are located at the external surface of the ZSM5 zeolite crystals. Additionally, it was established that the external ZSM5 zeolite surface, even for low Al content samples, contains two types of Lewis acid sites. Conversely, no evidence was found for the presence of bridging Si-(OH)-Al sites at the external surface of the ZSM5 zeolite samples. This further corroborates the proposal that the bridging "zeolitic'' Bronsted acid sites are actually formed as a consequence of the porous structure of the zeolites and do not simply arise from the substitution of Al for silicon in a silica framework MH - Italy MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 30 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000088087100032 L2 - SKELETAL ISOMERIZATION CATALYSIS; SURFACE-ACIDITY; IR; FERRIERITE; SILICALITE; ZSM-5; AL; CO SO - Physical Chemistry Chemical Physics 2000 ;2(14):3341-3348 119 UI - 16647 AU - Armas B AU - Herrera MD AU - Sibieude F AD - CNRS, Inst Sci & Genie Mat & Procedes, F-66125 Font Romeu, FranceHerrera, MD, UNAM, Dept Fis Aplicada & Tecnol Avanzada, Inst Fis, Apdo Postal 1-1010, Queretaro 76000, Mexico TI - Deposition of aluminium nitride coatings using a cold wall CVD reactor AB - Aluminium nitride was obtained in a cold wall reactor using AlCl3 and NH3 as precursors and N-2 as a carrier gas. AlCl3 was synthesized in situ by means of an original method based on the SiCl4,(g) reaction on Al(s). The substrate used is a cylinder of graphite coated with SiC and heated by high frequency induction. The deposition rate was studied as a function of temperature in the range 900-1500 degrees C, the total pressure varying from 2 to 180 hPa. At low temperatures an Arrhenius type representation of the kinetics for several pressures indicated a thermally activated behaviour with an apparent activation energy of about 80 kJ mol(-1). At high deposition temperatures the deposition rate was almost constant, indicating that the growth is controlled by the diffusion process. The influence of gas composition and total AlCl3 flow rate was also discussed. The different layers were characterized particularly by means of X-ray diffraction and scanning electron microscopy. The influence of temperature and total pressure on crystallization and morphology was studied. (C) 2000 Elsevier Science S.A. All rights reserved MH - France MH - Mexico|Queretaro PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000084717100016 L2 - aluminium nitride;chemical vapour deposition;CHEMICAL-VAPOR-DEPOSITION; ALN FILMS; GROWTH; AIN SO - Surface & Coatings Technology 2000 ;123(2-3):199-203 120 UI - 15349 AU - Armitage P AU - Healy MJR AU - Cox DR AU - Nelder J AU - Dawid AP AU - Kingman JFC AU - Bartholomew DJ AU - O'Hagan A AU - Hand DJ AU - Barnard G AU - Efron B AU - Sprott DA AU - Evett IW AU - Lindley D AD - Univ London Imperial Coll Sci Technol & Med, London, EnglandUniv Coll London, London WC1E 6BT, EnglandUniv Bristol, Bristol BS8 1TH, Avon, EnglandUniv Sheffield, Sheffield S10 2TN, S Yorkshire, EnglandStanford Univ, Stanford, CA 94305, USACtr Invest Matemat, Guanajuato, MexicoForens Sci Serv, London, England TI - The philosophy of statistics - Comments MH - United Kingdom MH - Mexico|Guanajuato MH - USA PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Editorial Material AV - English IS - 0039-0526 UR - ISI:000088997300002 L2 - FORENSIC IDENTIFICATION; INFERENCE; BOOTSTRAP; SCIENCE; BAYES SO - Journal of the Royal Statistical Society Series D-the Statistician 2000 ;49():319-337 121 UI - 14918 AU - Arnaudeau C AU - Miranda ET AU - Jenssen D AU - Helleday T AD - Univ Stockholm, Wallenberg Lab, Dept Genet & Cellular Toxicol, S-10691 Stockholm, SwedenAutonomous Univ Madrid, UNAM, Fac Chem, Dept Inorgan & Nucl Chem, Mexico City, DF, MexicoArnaudeau, C, Univ Stockholm, Wallenberg Lab, Dept Genet & Cellular Toxicol, S-10691 Stockholm, Sweden TI - Inhibition of DNA synthesis is a potent mechanism by which cytostatic drugs induce homologous recombination in mammalian cells AB - Recombination is a process thought to be underlying genomic instability involved in carcinogenesis. This report examines the potential of cytostatic drugs to induce intrachromosomal homologous recombination, Tn order to address this question, the hprt gene of a well-characterized mammalian cell line was employed as a unique endogenous marker for homologous recombination. Commonly used cytostatic drugs with different mode of action were investigated in this context, i.e. bifunctional alkylating agents, inhibitors of DNA synthesis, inhibitors of topoisomerases and a spindle poison. With the exception of the spindle poison, all these drugs were found to induce homologous recombination, with clear differences in their recombination potency, which could be related to their mechanism of action. Bifunctional alkylating agents were the least efficient, whereas inhibitors of DNA synthesis were found to be the most potent inducers of homologous recombination. This raises the question whether these later drugs should be considered for adverse effects in cancer chemotheraphy. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 24 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0921-8777 UR - ISI:000165203800006 L2 - cytostatic drugs;recombination;V79 Chinese hamster cell;hypoxanthine guanine phosphoribosyltransferase;CHINESE-HAMSTER CELLS; SISTER-CHROMATID EXCHANGES; MITOTIC RECOMBINATION; ANTICANCER DRUGS; INTRACHROMOSOMAL RECOMBINATION; CHROMOSOMAL-ABERRATIONS; GENE AMPLIFICATION; HUMAN CANCER; IN-VITRO; AGENTS SO - Mutation Research-Dna Repair 2000 ;461(3):221-228 122 UI - 16316 AU - Arora P AU - Kausz AT AU - Obrador GT AU - Ruthazer R AU - Khan S AU - Jenuleson CS AU - Meyer KB AU - Pereira BJG AD - Tufts Univ, Sch Med & Dialysis Clin Inc, New England Med Ctr, Tupper Res Inst,Div Nephrol, Boston, MA 02111, USATufts Univ, Sch Med & Dialysis Clin Inc, New England Med Ctr, Tupper Res Inst,Div Clin Care Res, Boston, MA 02111, USAPanamer Univ, Sch Med, Mexico City, DF, MexicoPereira, BJG, Tufts Univ, Sch Med & Dialysis Clin Inc, New England Med Ctr, Tupper Res Inst,Div Nephrol, 750 Washington St, Boston, MA 02111 USA TI - Hospital utilization among chronic dialysis patients AB - Factors driving inpatient and outpatient utilization were studied among patients who began dialysis for chronic renal failure at the New England Medical Center (NEMC) between 1992 and 1997. Clinical, laboratory, and hospital resource utilization data were obtained from patient records and electronic databases. There were 2.2 hospitalizations and 14.8 hospital days per patient year at risk (PYAR). The number of hospitalizations and hospital days per PYAR were higher in the first 3 mo of initiating dialysis (4.3 and 28.3, respectively) compared to after 3 mo (1.9 and 12.9, respectively). Factors associated with increased risk of hospital days within the first 3 mo included non-health maintenance organization insurance, ischemic heart disease, late referral to the nephrologist, and use of temporary vascular access for the first dialysis. Patients with ischemic heart disease and who received dialysis during the years 1992-1994 compared with 1996-1997 had an increased risk of hospital days after 3 mo of initiating dialysis. There were 16.6 outpatient visits per PYAR, with significant differences in utilization between the first 3 mo and after 3 mo of initiating dialysis. Thus, hospital utilization was significantly higher in the first 3 mo compared to after 3 mo, and factors associated with hospital utilization depended on duration of dialysis. In particular, delayed referral to the nephrologist and lack of permanent vascular access were independently associated with increased risk of hospital utilization in the first 3 mo of dialysis. Greater attention to timely referral to the nephrologist and timely placement of vascular access could result in reduced utilization and cost savings MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 39 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000086046900017 L2 - HEMODIALYSIS-PATIENTS; VASCULAR ACCESS; MANAGED-CARE; PHYSICIANS; MORBIDITY; MEDICARE; FAILURE; COSTS; RISK SO - Journal of the American Society of Nephrology 2000 ;11(4):740-746 123 UI - 15385 AU - Arreaga G AU - Cho IY AU - Guven J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoEmory Univ, Dept Phys, Atlanta, GA 30322, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoArreaga, G, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Stability of self-gravitating magnetic monopoles AB - The stability of a spherically symmetric self-gravitating magnetic monopole is examined in the thin wall approximation: modeling the interior false vacuum as a region of de Sitter space; the exterior as an asymptotically Rat region of the Reissner-Nordstrom geometry; and the boundary separating the two as a charged domain wall. There remains only to determine how the wall gets embedded in these two geometries. In this approximation, the ratio k of the false Vacuum to surface energy densities is a measure of the symmetry breaking scale eta. Solutions are characterized by this ratio, the charge on the wall Q, and the value of the conserved total energy M. We find that for each fixed k and Q up to some critical value, there exists a unique globally static solution, with M similar or equal to Q(3/2); any stable radial excitation has M hounded above by Q, the value assumed in an extremal Reissner-Nordstrom geometry, and these are the only solutions with M < Q. As M is raised above Q a black hole forms in the exterior: (i) for low Q or k, the wall is crushed; (ii) for higher values, it oscillates inside the black hole. If the mass is not too high the former solutions coexist with an inflating bounce: (iii) for k, Q or M outside the above regimes, there is a unique inflating solution. In case (i) the course of the bounce lies within a single asymptotically Rat region (AFR) and it resembles closely the bounce exhibited by a false vacuum bubble (with Q = 0). In case (iii) the course of the bounce spans two consecutive AFRs. However, for an asymptotic observer it resembles a monotonic false vacuum bubble MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088793100035 L2 - GLOBAL MONOPOLES; VACUUM BUBBLES; BLACK-HOLES; DYNAMICS; UNIVERSE; INFLATION; FIELD; MODEL SO - Physical Review D 2000 ;62(4):art-043520 124 UI - 16597 AU - Arreaga G AU - Lopez-Bonilla JL AU - Ovando G AD - IPN, Ctr Invest & Estudios Avanzados, Mexico City 0700, DF, MexicoInt Inst Integral Human Sci, Montreal, PQ H3H 1K5, CanadaUniv Autonoma Metropolitana Azcapotzalco, Div CBI, Area Fis, Mexico City 02200, DF, Mexico TI - Lanczos spintensor and Lienard Wiechert field AB - This paper proves that the analogies between the Lanczos spintensor K-abc for the conformal tensor of the spacetime and the Weert potential K-B(ijc) for the bounded part of the Lienard-Wiechert field allows to construct generators for the last one, which is important for the electrodynamics of classical charged particles MH - Canada MH - Mexico|Distrito Federal PB - NEW DELHI: INDIAN NAT SCI ACAD RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0019-5588 UR - ISI:000084949700008 L2 - Lanczos superpotential;splitting and generators for the Weert potential;potentials for the Lienard-Wiechert field;MAXWELL TENSOR; WAVE-EQUATION SO - Indian Journal of Pure & Applied Mathematics 2000 ;31(1):85-91 125 UI - 14721 AU - Arrizon V AU - Testorf M AU - Sinzinger S AU - Jahns J AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, PU, MexicoUniv Massachusetts, Dept Elect & Comp Engn, Lowell, MA 01854, USAFern Univ Hagen, LG Opt Nachrichtentech, D-58084 Hagen, GermanyArrizon, V, Inst Nacl Astrofis Opt & Elect, Apartado Postal 216, Puebla 72000, PU, Mexico TI - Iterative optimization of phase-only diffractive optical elements based on a lenslet array AB - We describe the design of Fourier-type phase-only array generators. The numerical optimization employs the Fienup algorithm, where the parageometric design of the phase retardation profile, with the form of a lenslet array, is used as the initial guess of the optimization process. This approach provides designs with high performance that can be obtained with comparatively low computing effort. This is particularly true for elements generating large spot arrays. For symmetric reconstruction fields, the optimized phase profile typically has the same symmetry as that for the reconstruction field and can be easily unwrapped. (C) 2000 Optical Society of America [S0740-3232(00)02612-0] OCIS codes: 050.1970, 200.4650, 070.2580, 090.1760 MH - Germany MH - Mexico|Puebla MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000165752300004 L2 - DESIGN; EFFICIENCY; GRATINGS SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(12):2157-2164 126 UI - 15927 AU - Arrizon V AU - Rojo-Velazquez G AU - Ibarra JG AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Arkansas, Fayetteville, AR 72701, USAArrizon, V, Inst Nacl Astrofis Opt & Elect, Apdo Postal 216, Puebla 72000, Mexico TI - Fractional Talbot effect: Compact description AB - We present a compact description of the fractional Talbot effect, with the simplest expression for the Fresnel field of a grating, together with the simplest polar formulas for Talbot coefficients MH - Mexico|Puebla MH - USA PB - TOKYO: OPTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Review AV - English IS - 1340-6000 UR - ISI:000087403900006 L2 - diffraction;Talbot effect;fractional Talbot effect;MULTILEVEL PHASE GRATINGS; ARRAY ILLUMINATORS; EQUATIONS SO - Optical Review 2000 ;7(2):129-131 127 UI - 15982 AU - Arroyo M AU - Zitzumbo R AU - Avalos F AD - CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, SpainCiatec A C, Guanajuato, MexicoUniv Aut Coahuila, Saltillo 25000, Coahuila, MexicoArroyo, M, CSIC, Inst Ciencia & Tecnol Polimeros, Juan Cierva 3, E-28006 Madrid, Spain TI - Composites based on PP/EPDM blends and aramid short fibres. Morphology/behaviour relationship AB - The effect of both a thermoplastic elastomer (EPDM) and short aramid fibres on polypropylene (PP) crystallization kinetics and tensile behaviour has been investigated. The results have shown that PP/EPDM blends are non-miscible in the melt, and, at low EPDM percentages in the blend (<25%), the particles of EPDM act as nucleating agents and co-crystallize with PP. However, at higher percentages, the EPDM obstructs the mobility of PP chains and hence decreases the PP crystallization rate. Aramid fibres are effective nucleating agents for PP crystallization, giving rise to the phenomenon of PP transcrystallinity on their surface. The tensile behaviour of the blends and composites are in intimate relation with the morphological characteristics of these materials. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Mexico|Guanajuato MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 31 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000087123900036 L2 - composites;PP/EPDM blends;aramid short fibres;MECHANICAL-PROPERTIES RELATIONSHIPS; ISOTACTIC POLYPROPYLENE; TRANSCRYSTALLINITY PHENOMENA; CRYSTALLIZATION SO - Polymer 2000 ;41(16):6351-6359 128 UI - 16081 AU - Arroyo M AU - Bernes S AU - Brianso JL AU - Mayoral E AU - Richards RL AU - Rius J AU - Torrens H AD - Natl Autonomous Univ Mexico, Fac Quim, DEPg, Mexico City 04510, DF, MexicoBUAP, Inst Ciencias, Ctr Quim, Puebla 72570, MexicoUniv Autonoma Barcelona, Fac Ciencias, Unidad Cristalog, E-08193 Barcelona, SpainJohn Innes Ctr Plant Sci Res, Norwich NR4 7UH, Norfolk, EnglandCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainTorrens, H, Natl Autonomous Univ Mexico, Fac Quim, DEPg, Cd Univ, Mexico City 04510, DF, Mexico TI - C-F bond activation in polyfluorobenzothiolate compounds of Os(III). X-ray structures of [Os(SC6F4(F-2))(SC6F5)(2)(PMe2Ph)(2)], [Os(SC6F5)(2)(o-S2C6F4)(PMe2Ph)] and [Os(C6F5)(2)(o-S2C6F4)(PMe2Ph)(2)] AB - Thermolysis of [Os(SR)(3)(PMe2Ph)(2)] (R = C6F5 (1a) or C6HF4-4 (1b)) in refluxing toluene affords [Os(SC6F5)(2)(o-S2C6F4)(PMe2Ph)] (2a), [Os(SC6HF4)(2)(o-S2C6HF3)(PMe2Ph)] (2b), and [Os(C6F5)(2)(o-S2C6F4)(PMe2Ph)(2)] (3a) through processes involving C-F and C-S bond cleavage as well as rearrangement of C-S bonds. The single-crystal diffraction structures of la, 2a and 3a have been determined. In the solid state compound 1a shows a C-F --> Os interaction. (C) 2000 Elsevier Science S.A. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000086737800010 L2 - C-F bond activation;polyfluorobenzothiolate;osmium;thermolysis;CARBON-FLUORINE BONDS; CRYSTAL-STRUCTURES; METAL-COMPLEXES; RHODIUM; RU(SC6F4(F-2))(SC6F5)2(PME2PH)2; REGIOSELECTIVITY; DERIVATIVES; MECHANISM; CLEAVAGE; LIGANDS SO - Journal of Organometallic Chemistry 2000 ;599(2):170-177 129 UI - 15929 AU - Arroyo P AU - Loria A AU - Fernandez V AU - Flegal KM AU - Kuri-Morales P AU - Olaiz G AU - Tapia-Conyer R AD - Mexican Hlth Fdn, Hyattsville, MD, USANatl Inst Nutr Salvador Zubiran, Hyattsville, MD, USACtr Dis Control & Prevent, Natl Ctr Hlth Stat, Hyattsville, MD 20782, USAArroyo, P, Perifer Sur 4809 Arenal Tepepan, Mexico City 14610, DF, Mexico TI - Prevalence of pre-obesity and obesity in urban adult Mexicans in comparison with other large surveys AB - Objective: 1. To estimate the prevalence of pre-obesity and obesity in a 1992 to 1993 national survey of the Mexican urban adult population. 2. To compare our findings with other national surveys and with data for Mexican Americans. Research Methods and Procedures: The national representative sample of the Mexican urban adult population included 8462 women and 5929 men aged 20 to 69 years from 417 towns of >2500 people. Body mass index (BMI), calculated from measured weight and height, was classified using the World Health Organization categories of underweight (BMI < 18.5 kg/m(2)), normal weight (BMI 18.5 to 24.9 kg/m(2)), pre-obesity (PreOB = BMI 25 to 29.9 kg/m(2)) and obesity (OB = BMI 30+ kg/m(2)). Estimates for Mexican Americans were calculated from U.S. survey data. Results: Overall, 38% of the Mexican urban adult population were classified as pre-obese and 21% as obese. Men had a higher prevalence of pre-obesity than women did at all ages, but women had higher values of obesity. Both pre-obesity and obesity increased with age up to the age range brackets of 40 to 49 or 50 to 59 years for both men and women. Both pre-obesity and obesity prevalence estimates were remarkably similar to data for Mexican Americans from 1982 through 1984. Comparison with other large surveys showed that countries differed more in the prevalence of obesity than of pre-obesity, leading to differences in the PreOB/OB ratio, and that countries also differed in the gender ratio (female/male) for both pre-obesity and obesity. Discussion: Pre-obesity and obesity were high in our population and increased with age. Our approach of characterizing large surveys by PreOB/OB and gender ratios appeared promising MH - Mexico|Distrito Federal MH - USA PB - ROCHESTER: NORTH AMER ASSOC STUDY OBESITY RP - NOT IN FILE U3 - TC 31 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 1071-7323 UR - ISI:000087403500007 L2 - prevalence;pre-obesity;obesity;national survey;Mexico;Mexican Americans;OVERWEIGHT; EPIDEMIC; TRENDS SO - Obesity Research 2000 ;8(2):179-185 130 UI - 15837 AU - Arteaga MA AU - Siciliano B AD - Univ Nacl Autonoma Mexico, DEPFI, Mexico City 04510, DF, MexicoUniv Naples Federico II, Dipartimento Informat & Sistemist, I-80125 Naples, ItalyArteaga, MA, Univ Nacl Autonoma Mexico, DEPFI, Mexico City 04510, DF, Mexico TI - On tracking control of flexible robot arms AB - A controller for solving the tracking problem of flexible robot arms is presented. In order to achieve this goal, the desired trajectory for the link (flexible) coordinates is computed from the dynamic model of the robot arm and is guaranteed to be bounded, and the desired trajectory for the joint (rigid) coordinates can be assigned arbitrarily. The case of no internal damping is also considered, and a robust control technique is used to enhance the damping of the system MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000087712300017 L2 - flexible robot arms;nonlinear control;robust control;tracking control;MANIPULATOR ARMS; DYNAMIC-MODEL SO - Ieee Transactions on Automatic Control 2000 ;45(3):520-527 131 UI - 16099 AU - Arzuffi R AU - Salinas-Loera C AU - Racotta IS AD - Escuela Nacl Ciencias Biol, Inst Politecn Nacl, Dept Fisiol, Mexico City 11340, DF, MexicoCtr Invest Biol Noreste, Div Biol Marina, La Paz, BCS, BoliviaArzuffi, R, IPN, CeProBi, Km 8-5 Carretera,Apto Postal 24, Yautepec 62730, Morelos, Mexico TI - Food aversion learning induced by lithium chloride in the crayfish Procambarus clarkii AB - The ability of the crayfish Procambarus clarkii to develop a food aversion learning was examined. For this purpose, in crayfishes fed with trout, a novel food (chicken) was associated in a single trial with a well-known toxic substance, lithium chloride (LiCl), and food intake was recorded for 10 days afterward using a two-choice protocol. All during the experimental period, a significant effect of treatment was observed that accounted for the lower chicken intake in the LiCl-treated group, compared with the control groups (NaCl-treated group and puncture group). In contrast, LiCl-treated animals had an increased trout intake during the entire period. In addition, it was observed that total food intake was similar among the three groups. These results indicate that the crayfish may develop a food aversion learning when illness is induced by LiCl after the animal accepts and eats a novel food. (C) 2000 Elsevier Science Inc. All rights reserved MH - Bolivia MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000086662300007 L2 - food aversion;lithium chloride;crayfish;LOBSTER PANULIRUS-ARGUS SO - Physiology & Behavior 2000 ;68(5):651-654 132 UI - 15024 AU - Ascencio F AU - Hirst TR AU - Wadstrom T AD - Biol Res Ctr, Marine Pathol Unit, Dept Marine Pathol, La Paz 23000, Baja Calif Sur, MexicoUniv Bristol, Dept Pathol & Microbiol, Bristol BS8 1TH, Avon, EnglandUniv Lund, Dept Med Microbiol, S-22100 Lund, SwedenAscencio, F, Biol Res Ctr, Marine Pathol Unit, Dept Marine Pathol, POB 128, La Paz 23000, Baja Calif Sur, Mexico TI - Production and secretion of collagen-binding proteins from Aeromonas veronii AB - Collagen-binding protein (CNBP) synthesized by Aeromonas veronii is located conserved within the subcellular fraction. The results of this study show that 98% of the total CNBP produced by Aer. veronii is present in the extracellular medium, and that the remaining CNBP is distributed either on the cell surface, within the periplasm or anchored on the outer membrane. CNBP is specifically secreted from Aer. veronii into the culture medium, because all the beta -lactamase activity was located in the cells and could be released by polymixin B extraction of periplasmic proteins. CNBP was produced at growth temperatures from 12 degreesC to 42 degreesC, but not at 4 degreesC. The findings indicate that the level of CNBP in the medium increases during the exponential growth phase and reaches a maximum during the early stationary phase. There was less CNBP production in poor nutrient MMB medium than in the rich LB nutrient medium. CNBP secretion, in contrast to aerolysin secretion, was unaffected by the exeA mutation of Aer. hydrophila. It is concluded that CNBP secretion from Aer. veronii must be achieved by a mechanism different from that reported for aerolysin secretion MH - United Kingdom MH - Mexico|Baja California Sur MH - Sweden PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1364-5072 UR - ISI:000089993000008 L2 - EXTRACELLULAR PROTEINS; ESCHERICHIA-COLI; VIBRIO-CHOLERAE; BIOTYPE SOBRIA; HYDROPHILA; FISH; FIBRONECTIN; INFECTIONS; ADHESION; HEMAGGLUTININ SO - Journal of Applied Microbiology 2000 ;89(4):607-616 133 UI - 16169 AU - Ashtekar A AU - Corichi A AD - Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Calif Santa Barbara, Inst Theoret Phys, Santa Barbara, CA 93106, USAAshtekar, A, Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Laws governing isolated horizons: inclusion of dilaton couplings AB - Mechanics of non-rotating black holes was recently generalized by replacing the static evens horizons used in standard treatments with 'isolated horizons'. This framework is extended to incorporate dilaton couplings. Since there can be gravitational and matter radiation outside isolated horizons, now the fundamental parameters of the horizon, used in mechanics, must be defined using only the local structure of the horizon, without reference to infinity. This task is accomplished and the zeroth and first laws are established. To complement the previous work, the entire discussion is formulated tensorially, without any reference to spinors MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000086502900003 L2 - BLACK-HOLE DYNAMICS; PARTICLE CREATION; THERMODYNAMICS SO - Classical and Quantum Gravity 2000 ;17(6):1317-1332 134 UI - 16443 AU - Assem I AU - Liu SP AU - de la Pena JA AD - Univ Sherbrooke, Sherbrooke, PQ J1K 2R1, CanadaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoAssem, I, Univ Sherbrooke, Sherbrooke, PQ J1K 2R1, Canada TI - The strong simple connectedness of a tame tilted algebra MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000085637100032 L2 - AUSLANDER-REITEN COMPONENTS SO - Communications in Algebra 2000 ;28(3):1553-1565 135 UI - 16416 AU - Astey L AU - Gitler S AU - Micha E AU - Pastor G AD - Inst Politecn Nacl, Ctr Invest, Mexico City 07000, DF, MexicoUniv Rochester, Dept Math, Rochester, NY 14627, USAInst Tecnol Autonoma Mexico, Mexico City 01000, DF, MexicoAstey, L, Inst Politecn Nacl, Ctr Invest, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Parallelizability of complex projective Stiefel manifolds AB - The question of parallelizability of the complex projective Stiefel manifolds is settled MH - Mexico|Distrito Federal MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000085725800040 SO - Proceedings of the American Mathematical Society 2000 ;128(5):1527-1530 136 UI - 15350 AU - Atakishiyev NM AU - Winternitz P AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Dept Math & Stat, Montreal, PQ H3C 3J7, CanadaAtakishiyev, NM, UNAM, Inst Matemat, Apartado Postal 273-3, Cuernavaca 62210, Morelos, Mexico TI - Bases for representations of quantum algebras AB - We derive an explicit expression for the eigenfunctions and the corresponding eigenvalues of the operator [q(1/4)J(+)(q) + q(-1/4) J(-)(q)]q (J3(q)/2) in arbitrary irreducible representation of the algebra su(q) (2). The general form of the intertwining operator A(J) (q), which is a q-extension of the classical su(2)-operator a(J), J(1)a(J) = a(J) J(3), is also found. The matrix elements of A(J) (q) are expressed in terms of the dual q-Kravchuk polynomials MH - Canada MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000088933400002 L2 - REAL 2-DIMENSIONAL SPHERE; POLYNOMIALS; SU(Q)(2) SO - Journal of Physics A-Mathematical and General 2000 ;33(30):5303-5313 137 UI - 14746 AU - Aung H AU - Toossi Z AU - McKenna SM AU - Gogate P AU - Sierra J AU - Sada E AU - Rich EA AD - Case Western Reserve Univ, Div Infect Dis, Cleveland, OH 44106, USAVet Adm Med Ctr, Cleveland, OH 44106, USANatl Inst Resp Dis, Mexico City, DF, MexicoAung, H, Case Western Reserve Univ, Div Infect Dis, Biomed Res Bldg,Room 1001,10th Floor,10900 Euclid, Cleveland, OH 44106 USA TI - Expression of transforming growth factor-beta but not tumor necrosis factor-alpha, interferon-gamma, and interleukin-4 in granulomatous lung lesions in tuberculosis AB - The expression of transforming growth factor (TGF-beta1), tumor necrosis factor-alpha (TNF-alpha), interferon-gamma (IFN-gamma) and interleukin-4 (IL-4) were assessed in lung tissues from patients with tuberculosis. Vimentin, a constitutively expressed cellular protein, was present in 12 of 19 tissue sections indicating adequate preservation of tissue proteins in these cases. Immunohistochemical studies for cytokines were done in the vimentin positive sections only. TGF-beta1 was localized to mononuclear phagocytes of tuberculous lung lesions in 4 of 12 tuberculosis patients. TNF-alpha, IFN-gamma, and IL-4 were absent in sections from all tuberculosis patients. The failure to detect the latter cytokines may indicate that these molecules may not be expressed at the site of disease, or are not a feature of the late stages of tuberculous granulomas. TGF beta -1, although not universally expressed, may be involved in the development and/or consequences of tuberculous granuloma formation. These data substantiate further the role of TGF-beta1 in the immunopathology of tuberculosis, (C) 2000 Harcourt Publishers Ltd MH - Mexico|Distrito Federal MH - USA PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 20 U4 - Respiratory System U5 - J;Article AV - English IS - 0962-8479 UR - ISI:000165670700002 L2 - ACTIVE PULMONARY TUBERCULOSIS; INTERMEDIATE-SIZED FILAMENTS; MYCOBACTERIUM-TUBERCULOSIS; CYTOKINE PRODUCTION; LOCAL PRODUCTION; BLOOD MONOCYTES; IFN-GAMMA; FIBROSIS; FACTOR-BETA-1; LOCALIZATION SO - Tubercle and Lung Disease 2000 ;80(2):61-67 138 UI - 16170 AU - Auria R AU - Frere G AU - Morales M AU - Acuna ME AU - Revah S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Chem Engn, Mexico City 09340, DF, MexicoEcole Natl Super Chim, Paris, FranceInst Rech Dev, Mexico City 11530, DF, MexicoRevah, S, Univ Autonoma Metropolitana Iztapalapa, Dept Chem Engn, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Influence of mixing and water addition on the removal rate of toluene vapors in a biofilter AB - The effects of successive mixing (homogenization) of packing material (peat), with or without water addition, on the removal of toluene vapors in a biofilter were studied. Over a period of 50 days, an increase in the Elimination Capacity (EC) of approximately 240% was obtained by successive mixing and water additions. After each mixing, a high EC of toluene was maintained only for a short period of 3-4 days. After this time, decreased biofilter performance was observed, probably associated with the development of dried and/or clogged zones. In the long-term experiments, an attenuation of the EC recovery was observed after successive mixing. In this case, an increase of 110% over 4 months of experiment was obtained. The global reduction of EC over time could be explained by the colonization of the biofilter by filamentous fungi which was facilitated by the mixing of the packing material. The most frequently observed fungi were identified as Scedosporium sp, and Cladosporium sp. (C) 2000 John Wiley & Sons, Inc. Biotechnol Bioeng 68: 448-455, 2000 MH - France MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 30 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000086501700010 L2 - mixing;water addition;toluene vapors;fungi;biofilter;DEGRADATION SO - Biotechnology and Bioengineering 2000 ;68(4):448-455 139 UI - 14506 AU - Avallone S AU - Guiraud JP AU - Guyot B AU - Olguin E AU - Brillouet JM AD - Ctr Cooperat Int Rech Agron Dev, Dept FLHOR, F-34032 Montpellier 1, FranceCtr Cooperat Int Rech Agron Dev, Dept CP, F-34032 Montpellier, FranceUniv Sci & Tech Languedoc, Lab Genie Biol & Sci Aliments, F-34095 Montpellier 5, FranceInst Ecol, Xalapa, Veracruz, MexicoBrillouet, JM, Ctr Cooperat Int Rech Agron Dev, Dept FLHOR, BP 5035, F-34032 Montpellier 1, France TI - Polysaccharide constituents of coffee-bean mucilage AB - Alcohol-insoluble residues (AIRs) were isolated from hand-dissected and commercial mucilages of depulped coffee beans. Both AIRs had similar polysaccharide composition: pectic substances (about 30%), cellulose (about 8%), and neutral noncellulosic polysaccharides (about 18%). Crude pectins were extracted from AIRs (dry-matter yield: about 23% to 35%) with dilute nitric acid (pH 1.5, 90 degreesC). Both pectins contained about 60% uronic acids with high degree of methyl esterification (about 62%) and moderate degree of acetylation (about 5%). Their molecular weights were low (about 12 to 29 kDa). They did not gel in the presence of sucrose at acidic pH MH - France MH - Mexico|Veracruz PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000166378300007 L2 - coffee;Coffea arabica L. var. typica Cramer;mucilage;cell-wall polysaccharides;mechanical demucilagination;CELL-WALL POLYSACCHARIDES; QUANTITATIVE-DETERMINATION; PECTINS; EXTRACTION; PULP SO - Journal of Food Science 2000 ;65(8):1308-1311 140 UI - 14607 AU - Avitia CI AU - Castellanos-Juarez FX AU - Sanchez E AU - Tellez-Valencia A AU - Fajardo-Cavazos P AU - Nicholson WL AU - Pedraza-Reyes M AD - Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, Guanajuato 36060, MexicoUniv Arizona, Dept Vet Sci & Microbiol, Tucson, AZ, USAPedraza-Reyes, M, Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, POB 187, Guanajuato 36060, Mexico TI - Temporal secretion of a multicellulolytic system in Myxobacter sp AL-1 - Molecular cloning and heterologous expression of cel9 encoding a modular endocellulase clustered in an operon with cel48, an exocellobiohydrolase gene AB - Gram-negative soil micro-organism Myxobacter sp. AL-1 possesses at least five extracellular cellulases, the production of which is regulated by the growth cycle. We cloned the complete gene for one of these cellulases, termed cel9, which encoded a 67-kDa modular family 9 endoglycohydrolase, which was produced during the stationary phase of growth and was strongly enhanced by avicel. The predicted product of cel9 matches the structural architecture of family 9 cellulases such as Thermonospora fusca endo/exocellulase E4. Cel9 protein was synthesized in Escherichia coli from a multicopy plasmid and in Bacillus subtilis from the isopropyl thiogalactoside-inducible Pspac promoter and was purified from the culture medium. Thermal stability, optimum pH and temperature dependence of Cel9 were similar when expressed from either source, and were indistinguishable from related cellulases produced by thermophilic bacteria. Downstream from cel9 was found a partial ORF designated cel48, the deduced product of which was highly similar to bacterial exocellobiohydrolases and processive endoglucanases belonging to family 48 of the glycosyl hydrolases. The cel9 and cel48 genes appear to be arranged as part of an operon MH - Mexico|Guanajuato MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000166113200015 L2 - cellulolytic systems;gene clusters;glycosyl hydrolases;Myxobacter sp AL-1;palindromic DNA sequences;BACILLUS-SUBTILIS; THERMOMONOSPORA-FUSCA; CLOSTRIDIUM-CELLULOLYTICUM; CELLULASE AVICELASE; SEQUENCE-ANALYSIS; ENZYME; ENDOGLUCANASE; FAMILIES; DOMAINS; IDENTIFICATION SO - European Journal of Biochemistry 2000 ;267(24):7058-7064 141 UI - 16180 AU - Axen GJ AU - Grove M AU - Stockli D AU - Lovera OM AU - Rothstein DA AU - Fletcher JM AU - Farley K AU - Abbott PL AD - Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095, USAStanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305, USACtr Invest Cient & Educ Super Ensenada, Dept Geol, Ensenada, Baja California, MexicoCALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USASan Diego State Univ, Dept Geol Sci, San Diego, CA 92181, USAAxen, GJ, Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA TI - Thermal evolution of Monte Blanco dome: Low-angle normal faulting during Gulf of California rifting and late Eocene denudation of the eastern Peninsular Ranges MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Review AV - English IS - 0278-7407 UR - ISI:000086480200001 L2 - NORTHEASTERN BAJA-CALIFORNIA; FISSION-TRACK GEOCHRONOLOGY; LAGUNA-SALADA FAULT; SOUTHERN-CALIFORNIA; UNITED-STATES; SALTON TROUGH; NORTHERN BAJA; OF-CALIFORNIA; PACIFIC PLATE; K-FELDSPAR SO - Tectonics 2000 ;19(2):197-212 142 UI - 15238 AU - Ayala ME AU - Ruiz S AU - Moran MD AU - Bukovsky A AU - Dominguez R AD - UNAM, FES Zaragoza, Biol Reprod Res Unit, Mexico City, DF, MexicoUniv Tennessee, Grad Sch Med, Knoxville, TN, USA TI - Effects of early postnatal androgenization or estrogenization on the monoamines in the anterior (AH) and medium hypothalamus (MH) of the female rat MH - Mexico|Distrito Federal MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000087862300612 SO - Biology of Reproduction 2000 ;62():322-322 143 UI - 16315 AU - Ayala OE AU - Lardizabal D AU - Reyes A AU - Rosales MI AU - Matutes JA AU - Arias AG AD - Univ La Habana, Fac Fis, Dept Fis Aplicada, Havana 10400, CubaCtr Invest Mat Avanzados, Chihuahua 31110, MexicoArias, AG, Univ La Habana, Fac Fis, Dept Fis Aplicada, Havana 10400, Cuba TI - Vacancy contents in MnZn ferrites from TG curves AB - Expressions for calculating the cation vacancy contents of MnZn ferrites from thermogravimetric curves are presented together with some experimental data. In a single-phase MnZn ferrite synthesized by conventional ceramic procedures, the O-2 evolution accompanying ferrite formation follows the formal equation. [GRAPHICS] where alpha and beta denote the MnO and ZnO mole fractions in the primary mixture gamma=alpha+beta, theta and phi depend on the quantities of Fe2+ and Mn3+ formed, respectively, phi=theta-phi and sigma'/sigma is a function of the former parameters. Even though the relative amounts of Fe2+/Fe3+ and Mn2+/Mn3+ remain uncertain, the vacancy content [V] of the ferrite can be determined because it depends on phi alone, which is related to the change in mass of the sample as the synthesis takes place through the equation phi=(1.5-gamma)mu(beta)/mu(O2)(1-m(f)/m(i)) Here, m(i) and m(f) are the masses of the sample before and after O-2 evolution, mu(B) is the formula mass of the ferrite and mu(O2) is the O-2 molar mass. Practically vacancy-free single-phase MnZn ferrite samples were obtained by sintering in air at 1250 degrees C and cooling in pure N-2 MH - Cuba MH - Mexico|Chihuahua PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 1418-2874 UR - ISI:000086006400036 L2 - MnZn ferrite;TG SO - Journal of Thermal Analysis and Calorimetry 2000 ;59(3):943-949 144 UI - 15371 AU - Ayala S AU - Noriega-Crespo A AU - Garnavich PM AU - Curiel S AU - Raga AC AU - Bohm KH AU - Raymond J AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCALTECH, SIRTF Sci Ctr, IPAC, Pasadena, CA 91125, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Washington, Dept Astron, Seattle, WA 98195, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAAyala, S, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - Optical and near-infrared study of the Cepheus E outflow, a very low-excitation object AB - We present images and spectra of the Cepheus E (Cep E) region at both optical and infrared wavelengths. Only the brightest region of the southern lobe of the Cep E outflow reveals optical emission, suggesting that the extinction close to the outflow source plays an important role in the observed difference between the optical and IR morphologies. Cep E is a unique object since it provides a link between the spectroscopic properties of the optical Herbig-Haro (HH) objects and those of deeply embedded outflows. The observed H-2 infrared lines allow us to determine an excitation temperature of similar to 2300 K, an Ortho-to-Para ratio of similar to 3, and an H-2 (1, 0)/(2, 1) S(1) line ratio of similar to 9. These results are consistent with the values observed for WH objects with detected NIR emission lines, with shock excitation as the main mechanism for their formation, and also with the values observed for embedded, NIR flows. The optical spectroscopic characteristics of Cep E (HH 377) appear to be similar to the ones of low-excitation HH objects. However, the electron density determined from the CS nl lambda lambda 6731/6717 line ratio for this object (n(e) = 4100 cm(-3)), and the [O I] lambda 6300/H alpha, [S II] lambda lambda(6717 + 6731)/H alpha ratios are higher than the values of all of the previously studied low-excitation HH objects. This result is likely to be the consequence of an anomalously high environmental density in the HH 377 outflow. The ionization fraction obtained for HH 377 is x(e) similar to 1%. From this result, together with the observed [O I] lambda 6300/H alpha line ratio, we conclude that the observed H alpha line emission is collisionally excited. From a comparison with shock models, we also conclude that the extinction toward HH 377 is very low. Comparing the observed H beta and H alpha fluxes of HH 377 with model predictions, we determine a shock speed between 15 and 20 km s(-1), although somewhat higher velocities also produce spectra with line ratios that qualitatively agree with the observations of HH 377 MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000089040800032 L2 - infrared radiation;ISM : individual (Cepheus E, HH 377);ISM : jets and outflows;HERBIG-HARO OBJECTS; MOLECULAR-HYDROGEN; CEP-E; H-2 FLUORESCENCE; EMISSION; SHOCK; JETS; SPECTROSCOPY; IONIZATION; EXTINCTION SO - Astronomical Journal 2000 ;120(2):909-919 145 UI - 15441 AU - az-Arencibia P AU - Hernandez-Calderon I AU - Hernandez-Ramirez LM AU - Tamargo MC AD - CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoCUNY City Coll, Dept Chem, New York, NY 10031, USAHernandez-Ramirez, LM, CINVESTAV, Dept Phys, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - A two-level model for intra-well exciton migration in Zn1-xCdxSe quantum wells AB - In this work we present a simple two-level model, which can be employed to describe the migration of weakly localized excitons in quantum wells (QW). The migration of excitons is an intra-well process which can be readily observed in QWs which present thickness fluctuations of a few monolayers that extend over large area terraces (also called islands) with dimensions much larger than the Bohr radius of the exciton. This effect is experimentally observed as relative changes of the intensity of the spontaneous emission, as a function of temperature, of the transitions of QWs with different thickness. This model has been successfully applied to the analysis of the temperature dependence of the photoluminescence spectra of Zn1-xCdxSe QWs MH - Mexico|Distrito Federal MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800006 L2 - RECOMBINATION; SPECTROSCOPY; LOCALIZATION; CARRIERS; DYNAMICS; STATES; LASERS SO - Physica Status Solidi B-Basic Research 2000 ;220(1):27-31 146 UI - 15820 AU - az-Arencibia P AU - Hernandez-Calderon I AU - Hernandez-Ramirez LM AU - Tamargo MC AD - CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoCUNY City Coll, Dept Chem, New York, NY 10031, USAUniv Havana, Fac Phys, Havana, CubaHernandez-Calderon, I, CINVESTAV, Dept Phys, Apdo Postal 14-470, Mexico City 07000, DF, Mexico TI - Photoluminescence properties of intra-well exciton migration in Zn1-xCdxSe quantum wells AB - We report the results of the investigation of the temperature dependence and the nature of the spontaneous excitonic emission of Zn1-xCdxSe QWs. The spectra are dominated by two main peaks, which show a strong change in relative intensities with temperature. The presence in the spectra of biexcitons and bound excitons was ruled out after the corresponding analyses. Calculation of the fundamental transitions of the QWs indicated that the peaks were due to thickness fluctuations of 1 and 2 monomolecular layers. The changes in the relative intensities of the two peaks in the photoluminescence spectra with temperature are attributed to exciton migration between QW regions differing in thickness one or two monomolecular layers (ML). The measured activation energy necessary for exciton migration, in order to establish thermal equilibrium as temperature increases, coincides with the energy difference of the exciton ground state of QWs with 1-2 ML thickness difference. The successful analysis of the spectra in terms of a simple two-level model indicated that localization of excitons due to QW thickness fluctuations and exciton migration are basic processes which have strong influence in the temperature dependence of the spontaneous emission of Zn1-xCdxSe QWs. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000087737600009 L2 - photoluminescence;exciton;quantum well;STIMULATED-EMISSION; OPTICAL-PROPERTIES; ROOM-TEMPERATURE; RECOMBINATION; LOCALIZATION; DYNAMICS; LASERS; HETEROSTRUCTURES; SPECTROSCOPY; CARRIERS SO - Microelectronics Journal 2000 ;31(6):443-450 147 UI - 15823 AU - az-Arencibia P AU - Hernandez-Calderon I AU - Hernandez-Ramirez LM AU - Tamargo MC AD - CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoCUNY City Coll, Dept Chem, New York, NY 10031, USADiaz-Arencibia, P, Univ Havana, Fac Phys, Havana, Cuba TI - Temperature dependence of exciton localization in Zn1-xCdxSe quantum wells AB - We report the results of the investigation of the temperature dependence of the spontaneous emission of localized excitons in Zn1-xCdxSe quantum wells (QWs). Two main peaks, which show a strong change in relative intensities with temperature, dominate the spectra, The presence in the spectra of biexcitons and bound excitons was ruled out after the corresponding analyses. Calculation of the fundamental transitions of the QWs suggested that the peaks are due to thickness fluctuations of one and two monomolecular layers. The successful analysis of the spectra in terms of a simple two-level model indicated that localization of excitons due to QW thickness fluctuations and exciton migration are basic processes which have noticeable;influence in the spontaneous emission of Zn1-xCdxSe QWs. (C) 2000 American Vacuum Society MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000087654200076 L2 - RECOMBINATION; SPECTROSCOPY; CARRIERS; DYNAMICS; STATES; LASERS SO - Journal of Vacuum Science & Technology B 2000 ;18(3):1526-1529 148 UI - 14729 AU - az-Calleja R AU - Garcia-Bernabe A AU - Sanchis MJ AU - del Castillo LF AD - Univ Politecn Valencia, Dept Termodinam Aplicada, E-46071 Valencia, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoDiaz-Calleja, R, Univ Politecn Valencia, Dept Termodinam Aplicada, E-46071 Valencia, Spain TI - Memory function for dielectric relaxation AB - The second-order memory function (SOMF) for the dicyclohexylmetyl-2metyl succinate is obtained by using simple numerical manipulation of the experimental dielectric data. According to the prescription given in a previous paper [J. Chem. Phys. 109, 9057 (1998)], the frequency behavior of the real and imaginary parts of the SOMF is discussed in terms of the Havriliak-Negami equation of the dielectric function, and together with the three-variable model describing the evolution of the torque-autocorrelation function. Furthermore, in this paper we present the temperature dependence of the parameters, which characterize the SOMF behavior for two ester substances. (C) 2000 American Institute of Physics. [S0021- 9606(00)51048-4] MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000165841300044 L2 - LIQUIDS; WATER SO - Journal of Chemical Physics 2000 ;113(24):11258-11263 149 UI - 15109 AU - az-Cruz JL AU - Hernandez JM AU - Toscano JJ AD - BUAP, Inst Fis, Puebla 72500, MexicoUniv Calif Riverside, Dept Phys, Riverside, CA 92521, USABUAP, Fac Ciencias Fis Matemat, Puebla 72000, MexicoDiaz-Cruz, JL, BUAP, Inst Fis, Ap Postal J-48, Puebla 72500, Mexico TI - Impact of the bounds on Higgs mass and m(w) on effective theories AB - We study the inter-relations that exist between the present experimental bounds on the Higgs mass, as obtained from radiative corrections to m(W), and the effective parameters, alpha(i) and Lambda. We find that the SM bounds on m(H), arising from a precise determination of the W mass, can be substantially modified by the presence of dimension-six operators which appear in the linear realization of the effective Lagrangian approach. A Higgs mass as heavy as 700 GeV can be allowed for scales of new physics of the order of 1 TeV MH - Mexico|Puebla MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000089631700005 L2 - STANDARD MODEL; VECTOR BOSONS; COUPLINGS SO - Modern Physics Letters A 2000 ;15(21):1377-1384 150 UI - 15507 AU - az-Gomez O AU - Rodriguez JC AU - Shelton AM AU - Lagunes T AU - Bujanos M AD - Univ Autonoma San Luis Potosi, Fac Agron, San Luis Potosi 78000, MexicoColegio Postgrad, Inst Fitosanidad, Texcoco 56230, Estado Mexico, MexicoCornell Univ, New York State Agr Expt Stn, Dept Entomol, Geneva, NY 14456, USACampo Expt Bajio, Celaya, Gto, MexicoDiaz-Gomez, O, Univ Autonoma San Luis Potosi, Fac Agron, Alvaro Obregon 64, San Luis Potosi 78000, Mexico TI - Susceptibility of Plutella xylostella (L.) (Lepidoptera : Plutellidae) populations in Mexico to commercial formulations of Bacillus thuringiensis AB - Populations of diamondback moth, Plutella xylostella (L.), sampled from commercial fields of crucifers in three states of Mexico, were tested for susceptibility to commercial formulations of Bacillus thuringiensis subsp. kurstaki (Berliner) (Dipel 2X), B. thuringiensis subsp. aizawai (XenTari), delta endotoxin Cry 1C (MC), and CryIA(c) (MW), and a mixture of B. thuringiensis subsp. kurstaki and subsp. aizawai (Agree). Leaf-dip bioassays confirmed variation in susceptibility of up to 13-fold for MVP, 12-fold for Dipel 2X, sevenfold for XenTari, fivefold for Agree, and less than fivefold for MC. Comparisons with previously published data indicate that at least the 12-fold variation in Dipel 2X would result in significant differences in control in the field. Based on the LC99 values observed for the products, we propose discriminating concentrations far each product. To ensure continued performance in the field we suggest that a resistance monitoring program be implemented to detect any changes in susceptibility to B. thuringiensis products and specific toxins and that their use be restricted to one generation per crop and that they be rotated with other groups of insecticides. Furthermore, we suggest enforcement of a crucifer host-free period and the development and implementation of cultural and biological control strategies to reduce overall population pressure so that fewer insecticidal treatments will be needed MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato MH - Mexico|San Luis Potosi MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000088599000060 L2 - Plutella xylostella;Bacillus thuringiensis;resistance;DIAMONDBACK MOTH LEPIDOPTERA; INSECTICIDE RESISTANCE; CRYSTAL PROTEIN; EVOLUTION; PYRALIDAE; AMERICA; FIELD SO - Journal of Economic Entomology 2000 ;93(3):963-970 151 UI - 15453 AU - az-Ortiz A AU - Sanchez JM AU - Moran-Lopez JL AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoDiaz-Ortiz, A, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - Phase transitions in confined antiferromagnets AB - Confinement effects on the phase transitions in antiferromagnets are studied as a function of the surface coupling v and the surface field h for b.c.c.(110) films. Unusual topologies for the phase diagram are attained for particular combinations of v and h. It is shown that some of the characteristics of the finite-temperature behavior of the system are driven by its low-temperature properties and consequently can be explained in terms of a ground-state analysis. Cluster variation free energies are used for the investigation of the finite temperature behavior MH - Mexico|San Luis Potosi MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800069 L2 - SURFACE SPIN-FLOP; CRITICAL-BEHAVIOR; BINARY-ALLOYS; SUPERLATTICES; FILMS; FE/CR(211); FLUIDS; MODEL SO - Physica Status Solidi B-Basic Research 2000 ;220(1):389-394 152 UI - 16304 AU - az-Perez JC AU - Bautista S AU - Villanueva R AD - Univ Georgia, Coastal Plain Expt Stn, Dept Hort, Tifton, GA 31793, USANatl Polytech Inst, Ctr Dev Biot Prod, Dept Biotechnol, Yautepec 62730, Morelos, MexicoDiaz-Perez, JC, Univ Georgia, Coastal Plain Expt Stn, Dept Hort, Tifton Campus, Tifton, GA 31793 USA TI - Quality changes in sapote mamey fruit during ripening and storage AB - Physical and chemical changes in sapote mamey (Pouteria sapota (Jacq.) H.E. Moore and Steam) fruit during ripening and storage at various temperatures were evaluated. Ripening was associated with flesh softening, an increase in soluble solids content (SSC), and a change in flesh color from yellow or pale pink to a dark pink or red. No changes in fruit skin color or in flesh acidity were observed as ripening progressed. Ripe fruit had 30% or higher SSC, orange or red flesh (hue angle = 52; chroma = 45; L = 60), acidity of 6-8 mM H+, and flesh firmness (compression force) less than or equal to 50 N. Flesh turned brown (L* value declined) in overripe fruit. Fruit held at 27, 25, or 20 degrees C ripened in 3.5, 5 or 7 days after harvest, respectively. Fruit kept at 10 degrees C showed minor changes in color and firmness and a slow rate of SSC increase. Fruit stored at 10 or 15 degrees C and then ripened at 20 degrees C had portions of the flesh with a much higher firmness and poorer development of red color compared to other parts of the fruit. This uneven ripening was probably a result of chilling injury. The number of fruit with injury was higher at 10 degrees C than at 15 degrees C, and increased with storage time. The rates of fruit weight loss relative to the initial fruit weight were 0.58, 0.98 and 1.83% d(-1) at 10, 20 and 27 degrees C, respectively. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000086110400009 L2 - chilling injury;postharvest;quality;ripening;fruit transpiration;Pouteria sapota SO - Postharvest Biology and Technology 2000 ;18(1):67-73 153 UI - 15206 AU - Bada JL AU - Lazcano A AD - Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USAUNAM, Fac Ciencias, Dept Biol, Mexico City, DF, MexicoBada, JL, Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA TI - Stanley Miller's 70th birthday MH - USA MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Biology U5 - J;Biographical-Item AV - English IS - 0169-6149 UR - ISI:000089355900001 SO - Origins of Life and Evolution of the Biosphere 2000 ;30(2-4):107-112 154 UI - 15990 AU - Baier G AU - Leder RS AU - Parmananda P AD - Univ Autonoma Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoUniv Autonoma Morelos, Fac Med, Cuernavaca, Morelos, MexicoUniv Wisconsin, Dept Elect Engn, Madison, WI 53706, USABaier, G, Univ Autonoma Morelos, Fac Ciencias, Cuernavaca, Morelos, Mexico TI - Human electroencephalogram induces transient coherence in excitable spatiotemporal chaos AB - A time series from a human electroencephalogram (EEG) is used as a local perturbation to a reaction diffusion model with spatiotemporal chaos. For certain finite ranges of amplitude and frequency it is observed that the strongly irregular perturbations can induce transient coherence in the chaotic system. This could be interpreted as "on-line" detection of an inherently correlated pattern embedded in the EEG MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000086941600062 L2 - CHEMICAL TURBULENCE; EPILEPTIC SEIZURES; DISORDER; PATTERNS; NOISE SO - Physical Review Letters 2000 ;84(19):4501-4504 155 UI - 15960 AU - Balda MS AU - Flores-Maldonado C AU - Cereijido M AU - Matter K AD - Univ Geneva, Dept Biol Cellulaire, CH-1211 Geneva 4, SwitzerlandCtr Res & Adv Studies, Dept Physiol, Mexico City 07300, DF, MexicoMatter, K, Univ Geneva, Dept Biol Cellulaire, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland TI - Multiple domains of occludin are involved in the regulation of paracellular permeability AB - Tight junctions form selective paracellular diffusion barriers that regulate the diffusion of solutes across epithelia and constitute intramembrane diffusion barriers that prevent the intermixing of apical and basolateral lipids in the extracytoplasmic leaflet of the plasma membrane. In MDCK cells, previous expression experiments demonstrated that occludin, a tight junction protein with four transmembrane domains, is critically involved in both of these tight junction functions and that its COOH-terminal cytoplasmic domain is of functional importance. By expressing mutant and chimeric occludin that exert a dominant negative effect on selective paracellular diffusion, we now demonstrate that the extracytoplasmic domains and at least one of the transmembrane domains are also critically involved in selective paracellular permeability. Multiple domains of occludin are thus important For the regulation of paracellular permeability, Expression of chimeras containing at least one transmembrane domain of occludin also resulted in an enhanced intracellular accumulation of claudin-4, another transmembrane protein of tight junctions, suggesting that the two proteins may cooperate in the regulation of paracellular permeability. (C) 2000 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Switzerland PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 47 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 0730-2312 UR - ISI:000087216100008 L2 - occludin;paracellular permeability;claudins;TIGHT-JUNCTION STRUCTURE; INTEGRAL MEMBRANE-PROTEINS; CANINE KIDNEY-CELLS; MOUSE MACROPHAGE; BARRIER; RESISTANCE; TRANSPORT; STRANDS; FIBROBLASTS; COMPONENT SO - Journal of Cellular Biochemistry 2000 ;78(1):85-96 156 UI - 16475 AU - Ballote LD AU - Ramanauskas R AU - Bartolo-Perez P AD - CINVESTAV, IPN, Unidad Merida, Merida 97310, Yuc, VenezuelaCICATA IPN, Mexico City 22800, DF, MexicoBallote, LD, CINVESTAV, IPN, Unidad Merida, Apdo Postal 73 Cordemex, Merida 97310, Yuc, Venezuela TI - Mn oxide film as corrosion inhibitor of Zn-Mn coatings AB - Despite the technological relevance of galvanized steels, in past years not enough attempts have been made to improve the corrosion resistance of hot dip galvanizing Zn coatings by alloying. In the present work a Zn-0.5%Mn coating was produced under controlled laboratory conditions. The level of corrosion protection offered by the addition of Mn to the Zn coating was investigated. Polarization measurements in sodium chloride solution and x-ray diffraction were used to determine their corrosion behavior. The corrosion rates of Zn and Zn-0.5%Mn coatings were in the same order of magnitude. However by comparing the corrosion rate on several samples, a reduction of the corrosion rate of the samples containing Mn was observed. This result was attributed to the presence of an oxide manganese film on the surface coating. This film was studied by AES and XPS spectroscopies. Preliminary results are presented in this paper MH - Mexico|Distrito Federal MH - Venezuela PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 2 U4 - Electrochemistry;Metallurgy & Metallurgical Engineering;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0048-7538 UR - ISI:000085452300004 L2 - hot-dip galvanizing;corrosion resistance;manganese;sodium chloride;zinc;auger electron spectroscopy;x-ray photoelectron spectroscopy;ZINC; CHLORIDE; STEEL SO - Corrosion Reviews 2000 ;18(1):41-51 157 UI - 15252 AU - Baltazar U AU - Dunn J AU - Gonzalez-Diaz S AU - Browder W AD - Hosp Gen Ciudad Mexico SSA, Dept Surg, Mexico City, DF, MexicoDunn, J, E Tennessee State Univ, James H Quillen Coll Med, Dept Surg, Box 70575, Johnson City, TN 37614 USA TI - Agenesis of the gallbladder AB - Agenesis of the gallbladder is rare. Three groups have been identified: these with multiple fetal anomalies, asymptomatic cases, and symptomatic cases. Right upper quadrant pain is present in 90% of the cases, nausea and vomiting in 60%, and jaundice in 35%, Operative strategy is aimed at thorough exploration to locate an aberrant gallbladder, We treated a 72-year-old woman with right upper quadrant pain, nausea, and vomiting but no fever or jaundice. Physical examination revealed right upper quadrant tenderness without rebound. The white blood cell count was 10,300/mm(3), Total bilirubin level was 1.6 mg/dL. Ultrasonography revealed one gallstone and an enlarged common bile duct. Laparoscopic cholecystectomy was converted to open technique after failure to locate the gallbladder, On intraoperative cholangiogram, no gallbladder was identified. A T-tube was placed MH - Mexico|Distrito Federal MH - USA PB - BIRMINGHAM: SOUTHERN MEDICAL ASSN RP - NOT IN FILE U3 - TC 7 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0038-4348 UR - ISI:000089274800016 SO - Southern Medical Journal 2000 ;93(9):914-915 158 UI - 16296 AU - Bang JM AU - Mazur AI AU - Shirokov AM AU - Smirnov YF AU - Zaytsev SA AD - Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen 0, DenmarkKhabarovsk State Tech Univ, Dept Phys, Khabarovsk 680035, RussiaMoscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119899, RussiaIowa State Univ, Int Inst Theoret & Appl Phys, Ames, IA 50011, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBang, JM, Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen 0, Denmark TI - P-matrix and J-matrix approaches: Coulomb asymptotics in the harmonic oscillator representation of scattering theory AB - The relation between the R- and P-matrix approaches and the harmonic oscillator representation of the quantum scattering theory (J-matrix method) is discussed. We construct a discrete analogue of the P-matrix that is shown to be equivalent to the usual P-matrix in the quasiclassical limit. A definition of the natural channel radius is introduced. As a result, it is shown to be possible to use a well-developed technique of R- and P-matrix theory for calculation of resonant states characteristics. scattering phase shifts, etc., in the approaches based on harmonic oscillator expansions, e.g., in nuclear shell-model calculations. The P-matrix is used also for formulation of the method of treating Coulomb asymptotics in the scattering theory in oscillator representation. (C) 2000 Academic Press MH - Denmark MH - Mexico|Distrito Federal MH - Russia MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000086173400003 L2 - ELECTRON-HYDROGEN SCATTERING; NUCLEON-NUCLEON-SCATTERING; CONTINUUM RPA; MODEL; RESONANCES; EXPANSIONS; MOMENTUM; DECAY SO - Annals of Physics 2000 ;280(2):299-335 159 UI - 16063 AU - Barats MS AU - Gonick HC AU - Rothenberg S AU - Balabanian M AU - Manton WI AD - Cedars Sinai Med Ctr, Div Nephrol, Los Angeles, CA 90048, USACedars Sinai Med Ctr, Allen Res Inst, Dept Med, Div Nephrol, Los Angeles, CA 90048, USAUniv Calif Los Angeles, Los Angeles, CA, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Dept Anesthesiol, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Study Populat Hlth, Cuernavaca, Morelos, MexicoKidney Consultants Med Grp, Mission Hills, CA, USAUniv Texas, Dept Geosci, Richardson, TX, USAGonick, HC, Cedars Sinai Med Ctr, Div Nephrol, Becker Bldg,Room 227,8700 Beverly Blvd, Los Angeles, CA 90048 USA TI - Severe lead-induced peripheral neuropathy in a dialysis patient AB - Toxic neuropathy caused by lead (manifested as wrist drop) was a frequent phenomenon before 1925, In modern times, it is a distinct rarity, We report herein a Hispanic woman who developed end-stage renal failure, followed by wrist drop, in whom the maximal total blood lead was 69 mu g/dL. Measurements of lead in her tibia and calcaneus by K-x-ray fluorescence, however, showed markedly elevated values, The wrist drop cleared after four treatments with intravenous calcium sodium edetate (Ca EDTA), In vitro studies of Pb-210 uptake by red blood cells (RBC) after incubation with normal or uremic plasma indicated that Pb-210 uptake was inhibited by uremic plasma, These studies suggest the presence of a transport inhibitor in uremia that modifies the distribution of lead between plasma and RBC, leading to lower overall blood values. (C) 2000 by the National Kidney Foundation, Inc MH - USA MH - Mexico|Morelos PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 1 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0272-6386 UR - ISI:000086908200028 L2 - lead;neuropathy;dialysis;active transport;CUMULATIVE EXPOSURE; SMELTER WORKERS; WHOLE-BLOOD; BONE; PLASMA; HYPERTENSION; INDICATORS; CHILDREN; DISEASE SO - American Journal of Kidney Diseases 2000 ;35(5):963-968 160 UI - 16272 AU - Barbarin-Castillo JM AU - Soto-Regalado E AU - Mclure IA AD - Univ Nuevo Leon, Fac Ciencias Quim, Monterrey, NL, MexicoUniv Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, EnglandBarbarin-Castillo, JM, Univ Nuevo Leon, Fac Ciencias Quim, Monterrey, NL, Mexico TI - A test of the McGlashan and Potter correlation for second virial coefficients of mixtures containing a tetramethyl substance AB - The corresponding states correlation of McGlashan and Potter has been tested twice in order to to predict the second virial coefficients of the mixtures (methane + tetramethylsilane or 2.2-dimethylpropane) at four different compositions in the temperature ranges 303.16 K to 403.16 K and 323.16 K to 403.16 K, repsectively. Predicted values are essentially identical to those obtained by using the more tested correlation of Pitzer-Curl-Tsonopoulos. Predictions were improved significantly, to yield deviations of only (0 to 2) per cent, after correcting the pseudocritical temperature by an empirical device due to Gunn and Prausnitz. (C) 2000 Academic Press MH - United Kingdom MH - Mexico|Nuevo Leon PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Chemistry, Physical U5 - J;Article AV - English IS - 0021-9614 UR - ISI:000086215800011 L2 - corresponding states correlations;second virial coefficients;mixtures;tetramethylsilane;2,2-dimethylpropane;methane SO - Journal of Chemical Thermodynamics 2000 ;32(4):567-569 161 UI - 15646 AU - Barbour MM AU - Fischer RA AU - Sayre KD AU - Farquhar GD AD - Australian Natl Univ, Inst Adv Studies, Res Sch Biol Sci, Environm Biol Grp, Canberra, ACT 2601, AustraliaAustralian Ctr Int Agr Res, Canberra, ACT 2601, AustraliaCIMMYT, Mexico City 06600, DF, MexicoFarquhar, GD, Australian Natl Univ, Inst Adv Studies, Res Sch Biol Sci, Environm Biol Grp, GPO Box 475, Canberra, ACT 2601, Australia TI - Oxygen isotope ratio of leaf and grain material correlates with stomatal conductance and grain yield in irrigated wheat AB - Theory (Craig and Gordon 1965; Dongmann et al. 1974; Sternberg et al. 1986; Farquhar and Lloyd 1993) suggests that the oxygen isotope ratio (delta(18)O) of plant material should reflect the evaporative conditions under which the material was formed, so that differences in stomatal conductance should show up in plant delta(18)O. To test this theory we measured the oxygen isotope ratio of organic matter from flag leaves at anthesis and grain at harvest from eight cultivars of spring wheat (Triticum aestivum L.) grown under irrigation in each of three seasons in Mexico. The cultivars ranged widely in stomatal conductance and in average grain yield, with which conductance was positively correlated. Supporting theory, the oxygen isotope ratio of flag leaves (delta(18)O(l)) was found to correlate negatively with stomatal conductance for two of the three seasons. The significant correlations are consistent with high conductance cultivars having lower leaf temperatures and kinetic fractionation factors, and higher vapour pressure fractionation factors and Peclet numbers, all of which combine to result in less enriched delta(18)O(l). Yield (grain weight per square meter) was also found to be significantly negatively correlated with delta(18)O(l) in two of the three seasons. delta(18)O(l) was as good a predictor of yield as stomatal conductance, and significantly better than carbon isotope discrimination. Correlations between grain delta(18)O (delta(18)O(g)) and physiological parameters were less clear. Significant negative correlations between delta(18)O(g) and stomatal conductance, leaf temperature and yield were found only during the first season. By measuring the oxygen isotope ratio of cellulose extracted from leaf samples, the difference in fractionation factors (epsilon(cp)) for cellulose and whole leaf tissue was assessed. epsilon(cp) was found to be variable, and more negative when delta(18)O(c) and delta(18)O(l) were lower. Cultivar means for delta(13)C and delta(18)O of whole leaf material were found to be significantly positively related, and the factors required to produce such a relationship are discussed MH - Australia MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 38 U4 - Plant Sciences U5 - J;Article AV - English IS - 0310-7841 UR - ISI:000088166400001 L2 - PHOTOSYNTHETIC RATE; PIMA COTTON; CELLULOSE; WATER; DISCRIMINATION; FRACTIONATION; TEMPERATURE; DELTA-C-13; DELTA-O-18; PROGRESS SO - Australian Journal of Plant Physiology 2000 ;27(7):625-637 162 UI - 15462 AU - Barmenkov YO AU - Kir'yanov AV AU - Starodumov AN AU - Maslyanitsyn IA AU - Shigorin VD AU - Lemmetyinen H AD - Ctr Invest Opt, Leon, Guanajuato, MexicoRussian Acad Sci, Inst Gen Phys, Moscow, RussiaTampere Univ Technol, Inst Mat Chem, FIN-33101 Tampere, FinlandBarmenkov, YO, Ctr Invest Opt, Loma Bosque 115, Leon, Guanajuato, Mexico TI - Study of nonlinear optical properties of multilayer Langmuir-Blodgett films containing bacteriorhodopsin AB - Multilayer oriented Langmuir-Blodgett films of bacteriorhodopsin were prepared and their nonlinear optical properties, including second harmonic generation and photoresponse at a two phase-modulated beams mixing, were Investigated. The nonlinear component of refractive index of the films was measured MH - Finland MH - Mexico|Guanajuato MH - Russia PB - AUGUSTA: AMER SOC PHOTOBIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0031-8655 UR - ISI:000088789400001 L2 - PURPLE MEMBRANE; TIME; HOLOGRAPHY; PHASE SO - Photochemistry and Photobiology 2000 ;72(2):151-154 163 UI - 16293 AU - Barmenkov YO AU - Kir'yanov AV AU - Starodumov AN AU - Kozhevnikov NM AU - Lemmetyinen H AD - Ctr Invest Opt, Leon 37150, Gto, MexicoSt Petersburg State Tech Univ, St Petersburg 195251, RussiaTampere Univ Technol, Inst Mat Chem, FIN-33101 Tampere, FinlandBarmenkov, YO, Ctr Invest Opt, Loma Bosque 115, Leon 37150, Gto, Mexico TI - Phase-modulated beams technique for thin photorefractive films characterization AB - The phase-modulated beams technique is developed for nonlinear thin photorefractive films characterization. In the Raman-Nath diffraction approximation, the formulas are deduced, allowing us to measure the amplitude of phase grating recorded in a film and its nonlinear refractive index n(2). The method is applied for studying Langmuir-Blodgett multilayer thin (similar to 0.6 mu m) films of Bacteriorhodopsin at wavelength 633 nm. (C) 2000 American Institute of Physics. [S0003-6951(00)02514-6] MH - Finland MH - Mexico|Guanajuato MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000086134700003 L2 - BACTERIORHODOPSIN FILM SO - Applied Physics Letters 2000 ;76(14):1801-1803 164 UI - 16401 AU - Barmenkov YO AU - Kozhevnikov NM AD - Ctr Invest & Opt, Leon, MexicoSt Petersburg State Tech Univ, St Petersburg, RussiaBarmenkov, YO, Ctr Invest & Opt, Leon, Mexico TI - Kinetics of the distortions of dynamic gratings upon two-wave mixing in photorefractive media AB - The results of computer simulation of the recording of dynamic phase gratings in reversible photosensitive media with strong local and nonlocal responses are presented. The self-diffraction of intense light beams recording a spatially displaced phase grating is shown to lead to a decrease in the effective thickness of the grating, inversion of its extrema, and the consequent formation of a central dip on the angular dependence of the diffraction efficiency. Formation of a phase grating by beams of unequal intensity in media with a local response is accompanied by discontinuous dynamics of the distortions of the fringes in the interference pattern and the phase grating, which lead to complicated irregular energy transfer between the beams in the initial stage of the recording process. (C) 2000 The Optical Society of America. [S1070-9762(00)01202-1] MH - Mexico|Guanajuato MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 1070-9762 UR - ISI:000085767600012 L2 - CRYSTALS; DIFFRACTION; HOLOGRAMS SO - Journal of Optical Technology 2000 ;67(2):145-148 165 UI - 16433 AU - Barmenkov YO AU - Kir'yanov AV AU - Starodumov AN AU - Leppanen VP AU - Vanhanen J AU - Jaaskelainen T AU - Kozhevnikov NM AD - Ctr Invest Opt, Leon 37150, Guanajuato, MexicoUniv Joensuu, FIN-80101 Joensuu, FinlandSt Petersburg State Tech Univ, St Petersburg 195251, RussiaBarmenkov, YO, Ctr Invest Opt, Leon 37150, Guanajuato, Mexico TI - Advanced model for a 4-keto Bacteriorhodopsin photocycle based on phase grating recording analysis AB - Peculiarities of the phase grating recording in polymer films containing 4-keto Bacteriorhodopsin are investigated under absorption saturation. The phase-modulated beams technique is used to measure photoresponse from the films in real time. Three maxima of the photoresponse are detected. The first two (at similar to 1 and similar to 10 s) correspond to the positive amplitude of the phase grating, whereas the third maximum corresponds to the negative one (at similar to 1 min). This phenomenon is explained, as theoretical analysis shows, by the spatial distortions of the grating, resulting in the fundamental spatial harmonic sign exchange. These maxima, we believe, correspond to three photocycles in the 4-keto Bacteriorhodopsin molecule, for which a novel scheme is suggested. The results of theoretical simulations are shown to be in good agreement with the experiment MH - Finland MH - Mexico|Guanajuato MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000085681600013 L2 - FILMS; ABSORPTION; HOLOGRAPHY SO - Laser Physics 2000 ;10(1):60-63 166 UI - 15783 AU - Barnetche JM AU - Flavell RA AU - Madrid-Marina V AU - Moreno J AD - IMSS, Autoimmune Dis Res Unit, Mexico City, DF, MexicoYale Univ, Sch Med, New Haven, CT, USAInst Publ Hlth, Cuernavaca, Morelos, Mexico TI - Deletion of early B cell precursors by constituive expresion of CD154 on B cells in transgenic mice MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000086643101621 SO - Faseb Journal 2000 ;14(6):A1187-A1187 167 UI - 14984 AU - Baron C AU - Equihua LO AU - Mestre JP AD - Degremont SA, F-92508 Rueil Malmaison, FranceDegremont Mexico SA CV, Mexico City 11300, DF, MexicoBaron, C, Degremont SA, 183 Ave 18 Juin 1940, F-92508 Rueil Malmaison, France TI - BOO Case: water management project for the use of reclaimed wastewater and desalted seawater for the "Antonio Dovali Jaime" refinery, Salina Cruz, Oaxaca, Mexico AB - The water management project for the "Antonio Dovali Jaime" Refinery is definitely one of the firsts of its type that has been implemented in Mexico. The aim of this project is to reduce the water consumption through seawater desalination for steam generation and reclamation of treated wastewater for cooling purposes. For this purpose Pemex-Refinacion opened a bidding process under a Build-Own-and-Operate scheme. In 1995 the partnership formed by BICONSA, Degremont and Marubeni was awarded this project. The processes selected include: reverse osmosis for seawater desalination as well as biological treatment with nitrification-denitrification and tertiary treatment for industrial wastewater treatment. The constrution of this facility started at the end of 1997 and started its operation at the end of 1999 MH - France MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400006 L2 - wastewater reclamation;wastewater reuse;seawater desalination;refinery wastewater;BOO facility SO - Water Science and Technology 2000 ;42(5-6):29-36 168 UI - 14885 AU - Barot M AU - Brustle T AU - de la Pena JA AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Bielefeld, Fak Math, D-4800 Bielefeld, GermanyBarot, M, Univ Nacl Autonoma Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Derived-tame tree algebras of type E AB - Let A be an algebra whose quiver is a tree and denote by chi (A) the quadratic Euler form associated with A. Suppose A contains a convex subcategory which is derived equivalent to a hereditary algebra of type E-p (E) over bar (p)(p = 6, 7, 8) or to a tubular algebra. Then we show that the repetitive category of A is tame precisely when chi (A) is non-negative MH - Germany MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0933-7741 UR - ISI:000165364800004 SO - Forum Mathematicum 2000 ;12(6):713-721 169 UI - 16323 AU - Barraza GA AU - Back WE AU - Mata F AD - Tecnol Monterrey, Dept Ind Engn, Monterrey 64849, NL, MexicoClemson Univ, Dept Civil Engn, Clemson, SC 29630, USATecnol Monterrey, Mgmt Grad Sch, Monterrey 64849, NL, MexicoBarraza, GA, Tecnol Monterrey, Dept Ind Engn, Monterrey 64849, NL, Mexico TI - Probabilistic monitoring of project performance using SS-curves AB - The purpose of this study was to develop a new concept of project control. This new concept uses stochastic S-curves (SS-Curves) as an alternative to using the deterministic S-curve technique commonly employed in professional practice. SS-curves are developed by determining the activity level variability in cost and duration. Simulation is the recommended approach for obtaining SS-curves, similar to the way chat stochastic schedules are currently developed. SS-curves provide probability distributions for expected, cost and duration for a given percentage of work completed. Monitoring project performance is performed by comparing the most: likely budget and duration values, obtained from respective probability distributions For actual progress, with the project's actual data and cumulative cost. By using this method, an evaluation of actual project performance can be developed that appropriately considers the natural variability of construction costs and duration, rather than utilizing only one possible deterministic outcome. Given the probabilistic characteristics of SS-curves, additional benefits are presented that enable a more comprehensive project control methodology MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 7 U4 - Construction & Building Technology;Engineering, Industrial;Engineering, Civil U5 - J;Article AV - English IS - 0733-9364 UR - ISI:000086105800009 SO - Journal of Construction Engineering and Management-Asce 2000 ;126(2):142-148 170 UI - 16410 AU - Barrera JL AU - Verastegui E AU - Meneses A AU - Zinser J AU - de la Garza J AU - Hadden JW AD - Natl Inst Cancerol, Dept Surg, Mexico City, DF, MexicoNatl Inst Cancerol, Dept Med, Mexico City, DF, MexicoNatl Inst Cancerol, Dept Pathol, Mexico City, DF, MexicoUniv S Florida, Coll Med, Dept Internal Med, Div Immunopharmacol, Tampa, FL 33612, USAHadden, JW, 428 Harbor Rd, Cold Spring Harbor, NY 11724, USA TI - Combination immunotherapy of squamous cell carcinoma of the head and neck - A phase 2 trial AB - Objectives: To test the efficacy of a natural cytokine mixture (IRX-2), cyclophosphamide, indomethacin, and zinc to-induce immune regression of squamous cell carcinoma (SCC) of the head and neck (H&N) prior to conventional therapy and to characterize the responses. Patients and Design: A phase 2 trial was performed in 15 adults with recently diagnosed, biopsy-confirmed H&N SCC (3 with stage II disease, 6 with stage III disease, and 6 with stage IV disease). The patients were treated with 20 days of perilymphatic injections of IRX-2 (administered subcutaneously at the base of the skull) in combination with contrasuppression consisting of a low-dose infusion of cyclophosphamide (300 mg/m(2)), and daily oral indomethacin and zinc (StressTabs) in a 21-day cycle before surgery and/or radiotherapy. Tumor dimensions, toxic effects, and disease-free survival were monitored. The tumor sections were histologically examined after surgery, and tumor reduction, fragmentation, and lymphoid infiltration were assessed. Results: All 15 patients responded clinically to the 21-day IRX-2 protocol: 1 with a complete response, 7 with a partial response, and 7 with a minor response. All 15 patients responded pathologically with tumor reduction (mean, 42%) and fragmentation (mean, 50%) in the histological section and increased lymphoid infiltration. The adverse effects of the IRX-2 protocol were negligible except for an allergic skin rash (n = 1) and parotiditis (n = 1). Indomethacin caused gastritis in 1 patient. Reduction of pain and ulceration and bleeding were observed in 8 and 4 patients, respectively. Four of 5 patients with lymphopenia showed increased CD3, CD4, and CD8 cell counts. After surgery (n = 13) and/or radiotherapy (n = 10) and with a mean follow-up of 17 months, 3 patients have had recurrences, 1 patient has died of disease, 1 patient has been re-treated with immunotherapy and has no evidence of disease, and 1 patient is alive with disease. Two patients died of other causes with no evidence of disease. Conclusions: The IRX-2 immunotherapy induced lymphocyte mobilization and infiltration in H&N SCC associated with clinical and histological tumor responses indicative of immune regression in all 15 patients. Minimal toxic effects were observed, and overall survival may have been improved. A phase 3 trial seems warranted MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 17 U4 - Otorhinolaryngology;Surgery U5 - J;Article AV - English IS - 0886-4470 UR - ISI:000085808500014 L2 - RECOMBINANT INTERLEUKIN-2; TUMOR-ANTIGENS; CANCER; CHEMOTHERAPY; REGRESSION; INJECTIONS SO - Archives of Otolaryngology-Head & Neck Surgery 2000 ;126(3):345-351 171 UI - 16524 AU - Barrera RG AU - Mendoza CI AU - Fuchs R AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoIowa State Univ, Ames Lab, Ames, IA 50011, USAIowa State Univ, Dept Phys & Astron, Ames, IA 50011, USABarrera, RG, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Electron energy-loss spectroscopy in systems of polarizable spheres AB - We start with a brief presentation of the dielectric formalism used to calculate the energy loss of high-energy electrons (100 keV) passing through a random system of polarizable spheres embedded in a homogeneous matrix. The formalism is then extended to the case of electrons traveling parallel to a homogeneous slab of finite thickness in which either ordered or disordered collections of polarizable spheres are embedded. For an ordered system in which the spheres are in a cubic array, the calculated energy-loss spectra are compared with those of an alternative theory. For a slab with disordered collections of spheres we find the energy-loss spectra using the recursive Green's function method and compare our results with the available experimental data as well as with an extension of the semiclassical-infinite-barrier (SCIB) model. Finally, we discuss the relevance of our work as well as trends for future research. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000085314700009 L2 - electron energy-loss spectroscopy;spectral representation;recursive Green's function method;spherical inclusions;surface response function;LOSS SPECTRA; COMPOSITE; MEDIA SO - Physica B 2000 ;279(1-3):29-32 172 UI - 15838 AU - Barrios VAE AU - Najera RH AU - Petit A AU - Pla F AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Polimeros, Mexico City 04510, DF, MexicoEcole Natl Super Ind Chim, Inst Natl Polytech Lorraine, CNRS UMR 7568, Lab Chim Phys Macromol, F-54001 Nancy, FranceEcole Natl Super Ind Chim, Inst Natl Polytech Lorraine, CNRS UPR 6811, Lab Sci Genie Chim, F-54001 Nancy, FranceBarrios, VAE, Natl Autonomous Univ Mexico, Fac Quim, Dept Polimeros, Mexico City 04510, DF, Mexico TI - Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst 1. Kinetic study AB - The hydrogenation of styrene-butadiene copolymers of known global composition, monomeric distribution, molecular weight and microstructure is here reported. The saturation was carried out through a sequential polymerization-hydrogenation process which efficiency relies on the use of the polymerization solvent and initiator (cyclohexane and n-butyllithium) as the hydrogenation solvent and catalyst promoter, respectively. The SBRs, dissolved in cyclohexane, were homogeneously hydrogenated using a Ziegler-Natta type catalyst, prepared with nickel acetylacetonate and n-butyllithium. The only species, which was not present in both parts of the global process, is the catalyst for the homogeneous hydrogenation: nickel acetylacetonate. Three types of SBRs were investigated on the basis of their monomeric distribution: diblock (D-SBR), triblock with polystyrene extremes (T-SBR) and random (R-SBR). All the copolymers studied were synthesized by anionic solution polymerization, The precursors and corresponding hydrogenated polymers were analyzed by infrared spectroscopy (FTIR) and nuclear magnetic resonance ((HNMR)-H-1) to determine the 1,2-vinyl and 1,4-trans double bond content in the butadiene portion of the copolymers. These data were used to calculate the saturation degree, X, considering the amount of double bonds of the precursor copolymers and the corresponding hydrogenated copolymer: X = (C-i0 - C-i)/C-i0. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000087742500007 L2 - anionic block and random SBRs;homogeneous hydrogenation;Ziegler-Natta type catalyst;hydrogenation kinetics;POLYMERS; RUBBER SO - European Polymer Journal 2000 ;36(9):1817-1834 173 UI - 15376 AU - Barthel R AU - Piedrahita JA AU - McMurray DN AU - Payeur J AU - Baca D AU - Guemes FS AU - Perumaalla VS AU - Ficht TA AU - Templeton JW AU - Adams LG AD - Texas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843, USATexas A&M Univ, Coll Vet Med, Dept Vet Anat & Publ Hlth, College Stn, TX 77843, USATexas A&M Univ, Coll Med, Dept Med Microbiol & Immunol, College Stn, TX 77843, USANatl Vet Serv Labs, Ames, IA 50011, USATexas Anim Hlth Commiss, Austin, TX 78758, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Microbiol & Inmunol, Mexico City 04510, DF, MexicoBarthel, R, Texas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843 USA TI - Pathologic findings and association of Mycobacterium bovis infection with the bovine NRAMP1 gene in cattle from herds with naturally occurring tuberculosis AB - Objective-To determine necropsy and Mycobacterium bovis culture results in cattle from herds with tuberculosis, the role of the bovine NRAMP1 gene rn resistance and susceptibility to infection with M bovis, and the association between magnitude of the tuberculous lesions and various types of M bovis isolates. Animals-61 cattle from herds with tuberculosis in Texas and Mexico. Procedure-61 cattle were evaluated by necropsy; 59 had positive and 2 had negative caudal fold tuberculin intradermal lest (CFT) results. Thirty-three cattle with positive CFT results were genotyped to evaluate polymorphism of the 3' untranslated region of the bovine NRAMP1 gene, using single-stranded conformational analysis, 9 were resistant to M bovis with no tuberculous lesions and negative M bovis culture results, and 24 were susceptible with tuberculous lesions and positive M bovis culture results. Isolates of M bovis were analyzed by restriction fragment length polymorphism (RFLP) on the basis of IS6110 sequences and direct-repeat fingerprinting patterns. Results-21 (35.6%; 21/59) cattle with positive CFT results had tuberculous lesions or positive culture results; in addition, 1 of 2 cattle with negative CFT results had tuberculous lesions and positive culture results. Tuberculous lesions were most common in the thorax (35/63, 55.5%) and lymphoid tissues of the head (10/63; 15.9%). Tuberculous lesions varied from 1 to 11/animal; 8 of 21 (38.1%) had solitary lesions. Associations were not found between resistance or susceptibility to infection with M bovis and polymorphism in the NRAMP1 gene or between the magnitude of the lesions and various RFLP types of M bovis isolates. Conclusions and Clinical Relevance-The NRAMP1 gene does not determine resistance and susceptibility to infection with M bovis in cattle MH - Mexico|Distrito Federal MH - USA PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 17 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000089078400024 L2 - RESISTANCE; SUSCEPTIBILITY; MICE; BCG; LESIONS; STRAINS SO - American Journal of Veterinary Research 2000 ;61(9):1140-1144 174 UI - 14975 AU - Bartnicki-Garcia S AU - Bracker CE AU - Gierz G AU - Lopez-Franco R AU - Lu HS AD - Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521, USAUniv Calif Riverside, Dept Math, Riverside, CA 92521, USAPurdue Univ, Dept Bot & Plant Pathol, W Lafayette, IN 47907, USAInst Tecnol & Estudios Super, Ctr Biotecnol, Monterrey 64849, MexicoBartnicki-Garcia, S, Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521 USA TI - Mapping the growth of fungal hyphae: Orthogonal cell wall expansion during tip growth and the role of turgor AB - By computer-enhanced videomicroscopy, we mapped the trajectory of external and internal cell surface markers in growing fungal hyphae to determine the pattern of cell wall expansion during apical growth, Carbon particles (India ink) were chosen as external markers for tip expansion of Rhizoctonia solani hyphae. Irregularities in the growing apical walls of R. solani sewed as internal markers. Marker movement was traced in captured frames from the videotaped sequences. External and internal markers both followed orthogonal trajectories; i.e., they moved perpendicular to the cell surface regardless of their initial position in the hyphal apex. We found no evidence that the tip rotates during elongation. The discovery that the cell wall of a growing hypha expands orthogonally has major repercussions on two fronts: 1) It supports the long-held view that turgor pressure is the main force driving cell wall expansion. 2) It provides crucial information to complete the mathematical derivation of a three-dimensional model of hyphal morphogenesis based on the vesicle supply center concept. In three dimensions, the vesicle gradient generated by the vesicle supply center is insufficient to explain shape; it is also necessary to know the manner in which the existing surface is displaced during wall expansion MH - USA MH - Mexico|Nuevo Leon PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 21 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000165104500015 L2 - CANDIDA-ALBICANS; COMPUTER-SIMULATION; MORPHOGENESIS; SPITZENKORPER; DETERMINES; BEHAVIOR SO - Biophysical Journal 2000 ;79(5):2382-2390 175 UI - 16167 AU - Bartolo-Perez P AU - Pena JL AU - Salas FH AU - Wheat HG AU - Hernandez-Duque G AD - IPN, CINVESTAV, Unidad Merida, Merida 97310, Yuc, VenezuelaUniv Oviedo, Dept Fis, E-33007 Oviedo, SpainUniv Texas, Dept Mech Engn, Austin, TX 78712, USAUniv Mayab, Fac Ingn, Merida 97310, Yuc, MexicoBartolo-Perez, P, IPN, CINVESTAV, Unidad Merida, AP 73 Cordemex, Merida 97310, Yuc, Venezuela TI - Corrosion of reinforced steel bars embedded in concrete: A study of electrochemical and surface analysis AB - We present a study of corrosion of reinforced steel bars embedded in concrete, We carried out both electrochemical analysis /E-corr polarization resistance (R-p), and electrochemical impedance spectroscopy (EIS)I and surface analysis by AES, XPS, SEM, and EDAX. We found that 1/R-p >28 mu S/cm(2), which gives I-corr > 0.73 mu A/cm(2), indicating that severe corrosion was occurring. After a 20-week exposure, the Nyquist plot of the electrochemical impedance Z(j omega) showed two capacitive arcs and rests of a third one, the corresponding time constants RC being related to the double layer, the interfacial thin film, and the concrete matrix, respectively. The interfacial thin film resistance (R-f) and the double-layer resistance (R-ct) are found to be about 220 Omega and 320 Omega, respectively. Departure from the capacitive semi-circles is observed, indicating the presence of diffusion-driven corrosion. Analysis of AES allowed us to determine the concentration of corrosion products on the surface and in the near surface region. Migration of S, C, and Ca to the surface was observed. From the XPS spectra we conclude, at room temperature, the existence of the following iron compounds: Fe2O3, and FeCl2, as well as the formation of CaCO3; these compounds appear before an inner iron-chromium oxide. SEM and EDAX show am existance of inhomogeneous corrosion in the inner layers MH - Mexico|Yucatan MH - Spain MH - USA MH - Venezuela PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 0 U4 - Electrochemistry;Metallurgy & Metallurgical Engineering;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0048-7538 UR - ISI:000086524000009 L2 - corrosion;reinforced steel;electrochemical impedance;surface analysis SO - Corrosion Reviews 2000 ;18(2-3):255-266 176 UI - 11414 AU - Baruch IS AU - Flores JM AU - Martinez JC AU - Nenkova B AD - IPN, CINVESTAV, Mexico City 07360, DF, MexicoBAS, IIT, Sofia, BulgariaNenkova, B, IPN, CINVESTAV, Av IPN 2508,AP 14470, Mexico City 07360, DF, Mexico TI - Fuzzy-neural models for real-time identification and control of a mechanical system AB - A two-layer Recurrent Neural Network Model (RNNM) and an improved Backpropagation-through-time method of its learning are described. For a complex nonlinear plants identification, a fuzzy-neural multi-model, is proposed. The proposed fuzzy-neural model, containing two RNNMs is applied for real-time identification of nonlinear mechanical system. The simulation and experimental results confirm the RNNM applicability MH - Bulgaria MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000174951600028 L2 - FRICTION COMPENSATION; DC MOTOR; HYSTERESIS SO - Artificial Intelligence: Methodology, Systems, Applications, Proceedings 2000 ;1904():292-300 177 UI - 16022 AU - Bashan Y AU - Davis EA AU - Carrillo-Garcia A AU - Linderman RG AD - USDA ARS, Hort Crops Res Lab, Corvallis, OR 97330, USACIB, Ctr Biol Res NW, La Paz 23000, MexicoLinderman, RG, USDA ARS, Hort Crops Res Lab, 3420 NW Orchard Ave, Corvallis, OR 97330 USA TI - Assessment of VA mycorrhizal inoculum potential in relation to the establishment of cactus seedlings under mesquite nurse-trees in the Sonoran Desert AB - A commonly observed preferential association was quantified between mature native mesquite (Prosopis articulata) trees and the seedlings of six cactus species (Pachycereus pringlei, Opuntia cholla, Lophocereus schottii, Machaerocereus gummosus, Lemaireocereus thurberi, Mammilaria sp.) in a previously-disturbed area of the Sonoran Desert of Baja California, Mexico. We hypothesized that, in addition to more favorable edaphic factors, the inoculum potential of beneficial vesicular-arbuscular mycorrhizal (VAM) fungi was higher, and therefore, more favorable for cactus seedling establishment under the mesquite tree canopy (UC) compared to adjacent barren areas (BAs) away from the trees. In the greenhouse inoculum potential assays, VAM fungi were detected in onion (Allium cepa) trap plants from all soil samples regardless of collection site, but cardon cactus (P. pringlei) trap seedlings formed no VAM even after 6.5 months. Test soils were further used to preinoculate new onion seedlings transplanted into pots, to serve as nurse plants to inoculate adjacent cardon seedlings by vegetative transfer. After 15 months, cardon seedlings did develop slight VAM colonization, confined exclusively to the outermost cortical layers. Examination of test soils for spores or root fragments revealed very few to none, and spore production on onion trap plant roots was also sparse even though colonization was high. Analysis of UC and BA soils revealed that the water holding capacity, nutrient content, cation exchange capacity, total carbon, and total nitrogen contents of the UC soils were all higher than those of the BA soils. Since the VAM inoculum density in this study was not different between sites under and away from the mesquite tree canopy, we concluded that VAM inoculum density is not the primary factor for the establishment of cactus seedlings and that edaphic factors probably play a more important role. Our results suggest, however, that VAM inoculum potential in these hot desert soils, although relatively low, is probably maintained in the upper layers by means of hyphal fragments rather than spores. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Soil Science U5 - J;Article AV - English IS - 0929-1393 UR - ISI:000087104200008 L2 - desert revegetation;inoculum potential;soil disturbance;Sonoran desert;vesicular-arbuscular mycorrhizae;VAM fungi;BAJA-CALIFORNIA; FUNGI; PLANTS; GROWTH; SOIL; MEXICO SO - Applied Soil Ecology 2000 ;14(2):165-175 178 UI - 15040 AU - Bashir A AU - Kizilersu A AU - Pennington MR AD - Univ Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Morelia, Michoacan, MexicoUniv Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, AustraliaUniv Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, AustraliaUniv Durham, Ctr Particle Theory, Durham DH1 3LE, EnglandBashir, A, Univ Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Apdo Postal 2-82, Morelia, Michoacan, Mexico TI - Does the weak coupling limit of the Burden-Tjiang deconstruction of the massless quenched three-dimensional QED vertex agree with perturbation theory? AB - We derive constraints on the non-perturbative 3-point fermion-boson transverse vertex in massless QED3 from its perturbative calculation to order alpha. We also check the transversality condition to two loops and evaluate the fermion propagator to the same order. We compare a conjecture of the non-perturbative vertex by Burden and Tjiang against our results and comment on its drawbacks. Our calculation calls for the need to construct a non-perturbative form for the fermion-boson vertex which agrees with its perturbative limit to O(alpha) MH - Australia MH - United Kingdom MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000089977200068 L2 - QUANTUM ELECTRODYNAMICS; 3-POINT VERTEX; GAUGE SO - Physical Review D 2000 ;6208(8): 179 UI - 16026 AU - Basiuk VA AU - Van Meervelt L AU - Soloshonok VA AU - Basiuk EV AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Arizona, Dept Chem, Tucson, AZ 85721, USAKatholieke Univ Leuven, Dept Chem, B-3001 Heverlee, BelgiumUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBasiuk, VA, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior CU,A Postal 70-543, Mexico City 04510, DF, Mexico TI - 2,2,5,5,8,8-Hexamethyl-2,3,5,6,7,8-hexahydroimidazo[1,2-a]pyrazine-3,6-d ione, a bicyclic product of alpha-aminoisobutyric acid condensation AB - The title compound, C12H19N3O2, is an unusual product of silica-catalyzed intermolecular condensation of alpha-amino-isobutyric acid. The molecule has three types of C-N bonds: a double bond, a cis-amide bond and single bonds, two of which are typical and two having intermediate lengths due to pi-electron delocalization between C=N and C=O groups. The cis-amide moieties interact to form dimers via hydrogen bonds which stack in parallel layers MH - Belgium MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 6 U4 - Crystallography U5 - J;Article AV - English IS - 0108-2701 UR - ISI:000087105800037 L2 - SPECTROSCOPY MASS-SPECTROMETRY; IDENTIFICATION; PYROLYSIS SO - Acta Crystallographica Section C-Crystal Structure Communications 2000 ;56():598-599 180 UI - 16065 AU - Basiuk VA AU - Navarro-Gonzalez R AU - Benilan Y AU - Raulin F AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoUniv Paris 12, UMR CNRS 7583, Lab Interuniv Syst Atmospher, F-94010 Creteil, FranceUniv Paris 07, UMR CNRS 7583, Lab Interuniv Syst Atmospher, F-94010 Creteil, FranceBasiuk, VA, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Circuito Exterior CU,A Postal 70-543, Mexico City 04510, DF, Mexico TI - PM3, AM1, MINDO3 semi-empirical IR spectra simulations for some nitriles of interest for Titan's chemistry AB - A set of the semi-empirical methods (PM3. AM1, MNDO and MINDO3) has been tested to find the best auxiliary tool for the identification of nitriles by gas chromatography/Fourier transform IR spectroscopy/mass spectrometry, considering five nitriles of interest for Titan's chemistry as test compounds: acetonitrile, acrylonitrile, cyanoacetylene, 2-butynenitrile and dicyanoacetylene. Of the four semi-empirical methods, MNDO can be considered as the most advantageous auxiliary tool for the gas chromatography/Fourier transform IR spectroscopy/mass spectrometry (GC/FTIR/MS) identification of nitriles of interest for Titan's atmospheric chemistry, since (1) the simulated IR spectra best match the experimental (in some cases AMI gives comparable results); (2) it provides the best linearity between the calculated and experimental frequencies (correlation coefficient of 0.990); a scaling factor of 0.90 Can be applied to afford better correspondence between the calculated and experimental wavenumbers. At the same time, none of the methods is able to predict infrared intensities and a spectral intensity pattern. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000086822500013 L2 - SPECTROSCOPY MASS-SPECTROMETRY; INFRARED-SPECTRA; BAND INTENSITY; AMINO-ACIDS; IDENTIFICATION; PRODUCTS; ATMOSPHERE; CONDENSATION; PYROLYSIS; AEROSOLS SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2000 ;56(6):1157-1165 181 UI - 14650 AU - Bassol S AU - Alvarado A AU - Celis C AU - Cravioto MC AU - Peralta O AU - Montano R AU - Novelli J AU - Albornoz H AU - Kesseru E AU - Soares A AU - Petracco A AU - Isaia B AU - Mendes J AU - Bahamondes L AU - de Melo NR AU - Reyes-Marquez R AU - Albrecht G AD - Univ Autonoma Coahuila, Ctr Invest Biomed, Torreon 27000, Coahuila, MexicoInst Nacl Perinatol, Mexico City, DF, MexicoHosp Gineco Obstetr Luis Castelazo Ayala, Mexico City 11455, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoHosp Clin Sn Borja Arriaran, Santiago, ChileHosp Carlos van Buren, Valparaiso, ChileHosp Frances, Buenos Aires, DF, ArgentinaHosp Clin, Buenos Aires, DF, ArgentinaSanta Casa Misericordia Rio de Janeiro, Serv Ginecol, Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, Ctr Clin, BR-22453 Rio De Janeiro, BrazilSanta Casa Misericordia Sao Paolo, Sao Paulo, BrazilCtr Pesquisas & Controle Doencas Materno Infantis, Campinas, SP, BrazilUniv Sao Paulo, Hosp Clin, Sao Paulo, BrazilCanada Latinoamer SA CV, Ctr Estrategico, Mexico City, DF, MexicoBassol, S, Univ Autonoma Coahuila, Ctr Invest Biomed, Calle Gregorio A Garcia 198 Sur, Torreon 27000, Coahuila, Mexico TI - Latin American experience with two low-dose oral contraceptives containing 30 mu g ethinylestradiol/75 mu g gestodene and 20 mu g ethinylestradiol/150 mu g desogestrel AB - The objective of this study was to compare cycle control, efficacy and tolerance of an oral contraceptive containing 20 mug ethinylestradiol and 150 mug desogestrel with a preparation containing 30 mug ethinylestradiol combined with 75 mug gestodene. This study involved 342 women and 4104 cycles use in Argentina, Brazil, Chile, and Mexico. Contraceptive efficacy was good with both formulations. Two pregnancies occurred in the desogestrel group but were not due to method failure. With respect to cycle control, the incidence of intermenstrual bleeding was higher during the first 3 cycles in the desogestrel group; it was significant (p <0.01) during the first 3 days of the cycle for a normal or heavy bleeding only in the Mexican group. Amenorrhea was not reported for any group, but the incidence of dysmenorrhea was significantly higher (p <0.01) in the Brazilian desogestrel group (13.8%) and was significantly lower (p <0.01) in the Mexican gestodene group (8.5%). Adverse events were similar in all the countries with headache, breast tension, and nausea, the most frequently reported symptoms. The range of mean increase in body weight varied from 0.2 kg in the Argentine group to 2.6 kg in the Chilian group (95% confidence limit, +/- 2.51) in the gestodene group, and 0.2 kg in the Argentine group to 2.5 kg in Brazilian group (95% confidence limit, +/- 2.36) in the desogestrel group. Fifteen women discontinued because of headache, but there were no significant differences between the groups regarding discontinuation for this and other medical or non-medical reasons. Both oral contraceptive preparations are reliable and well tolerated, and both have favorable effects on control cycle. (C) 2000 Elsevier Science Inc. All rights reserved MH - Argentina MH - Brazil MH - Chile MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000165953900005 L2 - ethinylestradiol;desogestrel;gestodene;intermenstrual bleeding;dysmenorrhea;CYCLE CONTROL SO - Contraception 2000 ;62(3):131-135 182 UI - 15566 AU - Bassol S AU - Cravioto MC AU - Durand M AU - Bailon R AU - Carranza S AU - Fugarolas J AU - Gaona R AU - Parada LM AU - Celis C AU - Santoyo S AU - Garza-Flores J AU - Vazquez L AU - Lopez C AU - Gurucharri C AU - Novelli J AU - de Oliveira HC AU - Mendez J AU - de Andrade ME AU - de Mello NR AU - de Melo K AU - Chada E AU - Yassle ME AU - Castaneda A AU - Gomez P AU - Arboleda C AU - Trujillo L AU - Bucheli R AU - Hidalgo I AU - Olavide R AU - Parejarios J AU - Succar J AU - Reyes-Marquez R AU - Albrecht G AD - Univ Autonoma Coahuila, Ctr Invest Biomed, Torreon 27000, Coahuila, MexicoCtr Asistencia Reprod Humana AC, Mexico City, DF, MexicoInst Modelo Ginecol & Obstet, Cordova, ArgentinaHosp Rivadavia, Buenos Aires, DF, ArgentinaHosp Frances, Buenos Aires, DF, ArgentinaHosp Univ Pedro Ernesto Estadual Rio de Janeiro, Rio De Janeiro, BrazilSanta Casa Misericordia Sao Paulo, Sao Paulo, BrazilCtr Reprod Humana & Fertilizacao Assistida, Curitiba, Parana, BrazilUniv Sao Paulo, Hosp Clin, Fac Med, Sao Paula, BrazilUniv Sao Paulo, Fac Med Ribeirao Preto, Hosp Clin, Sao Paula, BrazilProfamilia, Medellin, ColombiaInst Materno Infantil, Bogota, ColombiaClin Seguro Social, Cali, ColombiaHosp Gen Medellin, Medellin, ColombiaClin Privada Quito, Quito, EcuadorClin Privada Guayaquil, Guayaquil, EcuadorBassol, S, Univ Autonoma Coahuila, Ctr Invest Biomed, Calle Gregorio A Garcia 198 Sur, Torreon 27000, Coahuila, Mexico TI - Mesigyna (R) once-a-month combined injectable contraceptive: Experience in Latin America AB - A phase III clinical study was carried out among 534 fertile Latin American women to evaluate cycle control, side effects, and contraceptive efficacy of a once-a-month combined injectable, Mesigyna, consisting of 50 mg norethisterone enanthate and 5 mg estradiol valerate. The pregnancy rate at 1 year was 0 per 100 woman-years for a total experience of 4688 woman-months. The overall discontinuation rate at one year was 17.9%. Discontinuation rate for bleeding problems was 5.2%. The Colombian women had a significant increase (p <0.001) in bleeding problems compared to other countries. The discontinuation rate for amenorrhea was 1.1%. There were no significant differences between the groups regarding discontinuation for other medical or non-medical reasons. Mean weight gain after one year of use was 1.02 kg. Mesigyna is an appropriate once-a-month injectable contraceptive for Latin American women since it is highly effective and its perception of normal menstrual bleeding is of importance in the Latin American population. (C) 2000 Elsevier Science Inc. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Ecuador MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000088442300003 L2 - Mesigyna;once-a-month injectable contraceptive;menstrual bleeding;COMPARATIVE CLINICAL-TRIAL; INTRAMUSCULAR INJECTION; BLEEDING PATTERNS; CHINESE WOMEN; CYCLOFEM; NO.1 SO - Contraception 2000 ;61(5):309-316 183 UI - 16288 AU - Bassy O AU - Jimenez-Garcia LF AU - Echeverria OM AU - Vazquez-Nin GH AU - de la Espina SMD AD - CSIC, Ctr Invest Biol, Dpto Biol Vegetal, Lab Matriz Nucl, E-28006 Madrid, SpainUNAM, Fac Ciencias, Dpto Biol, Lab Microscopia Elect, Mexico City, DF, Mexicode la Espina, SMD, CSIC, Ctr Invest Biol, Dpto Biol Vegetal, Lab Matriz Nucl, Velazquez 144, E-28006 Madrid, Spain TI - High resolution detection of rRNA and rDNA in plant nucleoli with different activities by in situ hybridization AB - Ln the present work we perform in situ hybridization with probes to different stretches of rDNA and electron microscopy of nucleoli with different activities, to gain insight into the ultrastructural organization of transcription and processing in the plant nucleolus. The main ultrastructural nucleolar components: fibrillar centers (FC), dense fibrillar component (DFC), and granular component (GC), are arranged in different ways depending on nucleolar activity. Heterogeneous FCs containing RNP fibrils and nucleolar perichromatin granules are frequently seen in nucleoli in the process of activation. DNA-RNA in situ hybridization with biotinylated probes spanning different sequences of the rDNA unit followed by immunogold detection of biotin, demonstrated the localization of the ribosomal transcripts in DFC, mainly in the zones around the FCs, in GC, and in the periphery of pale FC. The internal region of the heterogeneous FCs is labeled only in cells in the process of activation of transcription after dormancy. The distribution of the U3 probe indicates that the processing of the rRNA takes place in the DFC and inside the heterogeneous FCs, in which transcription occurs. DNA-DNA hybridization demonstrates the presence of rDNA in the compact and extended chromatin located in the interior and at the periphery of I;Cs and in nucleolar associated chromatin. Our results support the view that the plant nucleolus has a highly dynamic morphological and functional organization composed of a bipartite domain formed by FCs surrounded by DFC, which is associated with rRNA transcription and processing, and the GC representing a store of preribosomal particles. 2000 (C) Editions scientifiques et medicales Elsevier SAS MH - Mexico|Distrito Federal MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 12 U4 - Cell Biology U5 - J;Article AV - English IS - 0248-4900 UR - ISI:000086178900005 L2 - plant cells;nucleolus;rRNA;rDNA;ultrastructure;RIBOSOMAL-RNA GENES; DIFFERENT PATTERNS; FIBRILLAR CENTERS; PISUM-SATIVUM; CELL-CYCLE; HELA-CELLS; TRANSCRIPTION; ORGANIZATION; ULTRASTRUCTURE; AUTORADIOGRAPHY SO - Biology of the Cell 2000 ;92(1):59-70 184 UI - 14689 AU - Batista CVF AU - Gomez-Lagunas F AU - Lucas S AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Sch Med, Dept Physiol, Mexico City 04510, DF, MexicoInst Butantan, Sao Paulo, BrazilPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Ave Univ 2001,POB 510-3, Cuernavaca 62210, Morelos, Mexico TI - Tcl, from Tityus cambridgei, is the first member of a new subfamily of scorpion toxin that blocks K+-channels AB - A new peptide, Tc1, containing only 23 amino acids closely packed by three disulfide bridges was isolated from the Amazonian scorpion Tityus cambridgei. It blocks reversibly the Shaker B K+-channels with a K-d of 65 nM and displaces binding of noxiustoxin to mouse brain synaptosome membranes. It is the shortest known peptide from scorpion venom that recognizes K+-channels and constitutes a new structural subfamily of toxin, classified as alphaKTx 13.1. (C) 2000 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000165897100007 L2 - scorpion toxin;K+-channel;Tityus cambridgei;PANDINUS IMPERATOR; NOXIUSTOXIN; PEPTIDES; VENOM SO - Febs Letters 2000 ;486(2):117-120 185 UI - 15179 AU - Baumgardner D AU - Raga GB AU - Kok G AU - Ogren J AU - Rosas I AU - Baez A AU - Novakov T AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80307, USAUniv Calif Berkeley, Berkeley Natl Lab, Berkeley, CA 94720, USANOAA, CMDL, Boulder, CO 80303, USABaumgardner, D, Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Circuito Exteriro,Ciudad Univ, Mexico City 04510, DF, Mexico TI - On the evolution of aerosol properties at a mountain site above Mexico City AB - Size distributions, scattering and absorption coefficients, and the bulk chemical composition of aerosols have been measured at a mountain site 400 m above the southwest sector of the Mexico City basin during a two-week period in November 1997. Variations in these properties are primarily related to local meteorology, i.e., wind direction and relative humidity; however, a link was found between carbon monoxide and ozone and the partitioning of aerosols between Aitken and accumulation mode sizes. Relative humidity was also found to affect this partitioning of aerosol size and volume. In addition, the fraction of sulfate in the aerosols was much higher on a high-humidity day than on a very low humidity day; however, the fraction of the mass contained in organic and elemental carbon was the same regardless of humidity levels. The daily variations of aerosol properties are associated with the arrival of new particles at the research site transported from the city basin and their subsequent mixture with aged aerosols that remain in the residual layer from the night before MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 22 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000089469100010 L2 - AIR-POLLUTION; MORTALITY; PARTICLES SO - Journal of Geophysical Research-Atmospheres 2000 ;105(D17):22243-22253 186 UI - 15328 AU - Bautista-Banos S AU - Hernandez-Lopez M AU - az-Perez JC AU - Cano-Ochoa CF AD - Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoInst Tecnol Zacatepec, Morelia, Michoacan, MexicoUniv Georgia, Dept Hort, Coastal Plain Expt Stn, Tifton, GA 31793, USABautista-Banos, S, Ctr Desarrollo Prod Biot, Carr Yautepec Jojutla Km 8-5, Yautepec 62731, Morelos, Mexico TI - Evaluation of the fungicidal properties of plant extracts to reduce Rhizopus stolonifer of 'ciruela' fruit (Spondias purpurea L.) during storage AB - Rhizopus stolonifer is one of the main postharvest pathogens of 'ciruela' fruit (red mombin) (Spondias purpurea L.) during handling and storage. To evaluate the fungicidal potential of plants indigenous to the state of Morelos, Mexico, aqueous extracts of leaves or stems of 19 different plant species were tested against Rhizopus development in vitro and in vivo. Extracts were applied to fruit of three botanical varieties of ciruela: fruit Skin turning green to Icd, green to yellow or green to orange, grown throughout the year over dry and wet seasons. In vitro evaluations were carried out to observe mycelial growth, sporulation and conidial germination. Evaluations on fruit were percentage and disease severity, soluble solids content (SSC) and weight loss after 4 days storage at ambient temperature. In general, leaf extracts had better fungicidal effects than stem extracts. For in vitro studies, leaf extracts inhibited sporulation and spore germination more than mycelial development. Leaf extracts of Annona cherimola, Bromelia hemisphaerica and Curica papaya inhibited Rhizopus sporulation and rot development on the yellow variety whereas extracts of Casimiroa edulis reduced R. stolonifer rot on red ciruela. Infection spread from 25 to 100% of the fruit surface depending on extract or ciruela variety. After storage, SSC values were not significantly different. Less weight loss was observed for the orange variety than the other varieties. Further studies need to be undertaken to isolate the active compounds from those extracts with fungicidal potential. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000089047700010 L2 - red mombin;yellow mombin;biofungicides;postharvest rots;aqueous extracts;PAPAYA SO - Postharvest Biology and Technology 2000 ;20(1):99-106 187 UI - 15469 AU - Bautista R AU - Crawley-Boevey W AU - Lei TG AU - Zhang YB AD - Univ Nacl Autonoma Mexico, Inst Math, Mexico City 04510, DF, MexicoUniv Leeds, Dept Pure Math, Leeds LS2 9JT, W Yorkshire, EnglandBeijing Normal Univ, Dept Math, Beijing 100875, Peoples R ChinaBautista, R, Univ Nacl Autonoma Mexico, Inst Math, Mexico City 04510, DF, Mexico TI - On homogeneous exact categories AB - In the present paper we prove that a certain subcategory E of the module category over some infinite-dimensional algebra R has almost split sequences and strongly homogeneous property; i.e., for each indecomposable module M in E, there is an almost split sequence starting and also ending at M. It is also proved that except for a trivial case, E is of wild representation type, (C) 2000 Academic Press MH - United Kingdom MH - Mexico|Distrito Federal MH - Peoples R China PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000088703000014 L2 - SPLIT-SEQUENCES; REPRESENTATION THEORY; ARTIN ALGEBRAS SO - Journal of Algebra 2000 ;230(2):665-675 188 UI - 14598 AU - Bayro-Corrochano E AU - Zhang YW AD - Ctr Invest Matemat AC, Guanajuato 36000, MexicoUniv Kiel, Inst Comp Sci, D-24105 Kiel, GermanyBayro-Corrochano, E, Ctr Invest Matemat AC, Apartado Postal 402, Guanajuato 36000, Mexico TI - The motor extended Kalman filter: A geometric approach for rigid motion estimation AB - In this paper the motor algebra for linearizing the 3D Euclidean motion of lines is used as the oretical basis for the development of a novel extended Kalman filter called the motor extended Kalman filter (MEKF). Due to its nature the MEKF can be used as online approach as opposed to batch SVD methods. The MEKF does not encounter singularities when computing the Kalman gain and it can estimate simultaneously the translation and rotation transformations. Many algorithms in the literature compute the translation and rotation transformations separately. The experimental part demonstrates that the motor extended Kalman filter is an useful approach for estimation of dynamic motion problems. We compare the MEKF with an analytical method using simulated data. We present also an application using real images of a visual guided robot manipulator; the aim of this experiment is to demonstrate how we can use the online MEKF algorithm. After the system has been calibrated, the MEKF estimates accurately the relative position of the end-effector and a 3D reference line. We believe that future vision systems being reliably calibrated will certainly make great me of the MEKF algorithm MH - Germany MH - Mexico|Guanajuato PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Artificial Intelligence;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0924-9907 UR - ISI:000166111700004 L2 - computer vision;Clifford algebra;geometric algebra;kinematics;dynamics;rotors;motors;screws;Kalman filter techniques;extended Kalman filter;visual robotics;ATTITUDE SO - Journal of Mathematical Imaging and Vision 2000 ;13(3):205-228 189 UI - 14686 AU - Bayro-Corrochano E AU - Daniilidis K AU - Sommer G AD - Ctr Invest Matemat, Guanajuato 36000, MexicoUniv Penn, Grasp Lab, Philadelphia, PA 19104, USAUniv Kiel, Inst Comp Sci, D-24105 Kiel, GermanyBayro-Corrochano, E, Ctr Invest Matemat, Apartado Postal 402, Guanajuato 36000, Mexico TI - Motor algebra for 3D kinematics: The case of the hand-eye calibration AB - In this paper we apply the Clifford geometric algebra for solving problems of visually guided robotics. In particular, using the algebra of motors we model the 3D rigid motion transformation of points, lines and planes useful for computer Vision and robotics. The effectiveness of the Clifford algebra representation is illustrated by the example of the hand-eye calibration. It is shown that the problem of the hand-eye calibration is equivalent to the estimation of motion of lines. The authors developed a new linear algorithm which estimates simultaneously translation and rotation as components of rigid motion MH - Germany MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Artificial Intelligence;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0924-9907 UR - ISI:000165905300001 L2 - computer vision;kinematics;visual robotics;Clifford algebra;geometric algebra;rotors;motors;screws;hand-eye calibration;ROBOT MANIPULATORS; TRANSFORMATIONS; QUATERNIONS; MATRICES; SENSOR SO - Journal of Mathematical Imaging and Vision 2000 ;13(2):79-100 190 UI - 15399 AU - Bayro-Corrochano E AU - Kahler D AD - Ctr Invest Matemat, Guanajuato, Gto, MexicoUniv Kiel, Inst Comp Sci, D-24105 Kiel, GermanyBayro-Corrochano, E, Ctr Invest Matemat, AC Apartado Postal 402, Guanajuato, Gto, Mexico TI - Motor algebra approach for computing the kinematics of robot manipulators AB - This article presents the formulation of the robot manipulator kinematics in the geometric algebra framework. In this algebraic system the three-dimensional Euclidean motion of points, lines, and planes can be advantageously represented using the algebra of motors. The computational complexity of the direct and indirect kinematics and other problems concerning robot manipulators depend on their degrees of freedom as well as on their geometric characteristics. Our approach makes possible a direct algebraic formulation of the problem in such a way that it reflects the underlying geometric structure. This is achieved by switching where necessary to a description of parts of the problem based on motor representations of points, lines, and planes. This article presents the formulation and computation of closed-form solutions of the direct and indirect kinematics of standard robot manipulators and a simple example of a grasping task. The flexible method presented here is new, and it widens the current standard point or line representation-based approaches for the treatment of problems related to robot manipulators. (C) 2000 John Wiley gr Sons, Inc MH - Germany MH - Mexico|Guanajuato PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Robotics U5 - J;Article AV - English IS - 0741-2223 UR - ISI:000088830200004 L2 - MATRICES SO - Journal of Robotic Systems 2000 ;17(9):495-516 191 UI - 14226 AU - Bea RG AU - Valle O AD - Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoBea, RG, Univ Calif Berkeley, Dept Civil & Environm Engn, 212 McLaughlin Hall, Berkeley, CA 94720 USA TI - Key issues associated with development of reassessment and requalification criteria for platforms in the Bay of Campeche, Mexico AB - Petroleos Mexicano (PEMEX) and Institute Mexicano del Petroleo (IMP) have developed and issued Transitory Criteria for reassessment and requalification of platforms and pipelines in the Bay of Campeche (1998). The purpose of this paper is to highlight some of the key issues that were associated with development of the PEMEX-IMP guidelines and to identify some of the future efforts that are intended to extend the technology of platform reassessment and requalifications. It is hoped that the open exchange and discussion of this experience will help promote worldwide cooperation and development of this important technology. [S0892-7219(00)00801-3] MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Ocean;Engineering, Mechanical U5 - J;Article AV - English IS - 0892-7219 UR - ISI:000167107000003 SO - Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme 2000 ;122(1):7-19 192 UI - 16574 AU - Becker V AU - Tapia M AU - Alvarez R AU - Gonzalez-Serratos H AU - Ortega A AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Maryland, Sch Med, Dept Physiol, College Pk, MD 20742, USA TI - Muscle adaption to exercise, changes the Ca2+-pump activities from T-Tubule and sarcoplasmic reticulum membranes MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779302549 SO - Biophysical Journal 2000 ;78(1):436A-436A 193 UI - 15267 AU - Behle RW AU - McGuire MR AU - Tamez-Guerra P AD - USDA ARS, Natl Ctr Agr Utilizat Res, Bioact Agents Res Unit, Peoria, IL 61604, USAUANL, Dept Microbiol & Inmunol, Fac Ciencias Biol, San Nicolas Garza 66450, NL, MexicoBehle, RW, USDA ARS, Natl Ctr Agr Utilizat Res, Bioact Agents Res Unit, 1815 N Univ St, Peoria, IL 61604 USA TI - Effect of light energy on alkali-released virions from Anagrapha falcifera nucleopolyhedrovirus AB - We compared the insecticidal activities of occluded and nonoccluded AfMNPV baculovirus obtained by dissolving the occlusion bodies (OB) with sodium carbonate. Droplet feeding and cotton leaf feeding bioassay techniques were used to determine the dose response against neonate Trichoplusia ni (Hubner) and loss of insecticidal activity when the virus was exposed to simulated sunlight from a xenon light source. Using droplet bioassays to determine a dose response, nonoccluded virus (NOV) was 20 times more active (LC50 = 4.8 x 10(3) OB/ml, dissolved) than occluded virus (LC50 = 9.6 x 10(4) OB/ml) when the samples remained wet. However, NOV lost activity when air dried before being tested by droplet (LC50 > 1.0 x 10(6) OB/ml) or leaf feeding (LC50 > 3.0 x 10(6) OB/ml) bioassays. Adding sucrose to NOV prevented the loss of insecticidal activity when samples were dried. The activity of NOV with 2% sucrose was similar to that of occluded virus samples, with or without sucrose, in both droplet feeding and leaf feeding assays. These results indicate that the OB protected the insecticidal activity of virions from the detrimental effects of drying. The OB also provided some protection from the detrimental effects of simulated sunlight (xenon) exposure. NOV samples exposed to xenon light had significantly greater loss of insecticidal activity than did similar samples of occluded virus. Without advancement in technologies, such as formulations, possible benefits of increased insecticidal activity from the use of nonoccluded virus is probably not sufficient to offset the rapid loss of activity due to drying or light exposure. (C) 2000 Academic Press MH - USA MH - Mexico|Nuevo Leon PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000089301200005 L2 - NUCLEAR POLYHEDROSIS-VIRUS; SIMULATED SUNLIGHT-UV; AUTOGRAPHA-CALIFORNICA; FORMULATIONS; BACULOVIRUS SO - Journal of Invertebrate Pathology 2000 ;76(2):120-126 194 UI - 16523 AU - Beitia C AU - Borensztein Y AU - Barrera RG AU - Roman-Velazquez CE AU - Noguez C AD - Univ Paris 06, Lab Opt Solides, F-75252 Paris 05, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBorensztein, Y, Univ Paris 06, Lab Opt Solides, Case 80,4 Pl Jussieu, F-75252 Paris 05, France TI - Multipolar plasma resonances in supported alkali-metal nanoparticles AB - Multipolar effects in the polarizability of metallic potassium particles on a silicon substrate were studied using differential reflectance spectroscopy. The experimental spectra were compared with calculations of the effective polarizability of particles of different shapes leading to the conclusion that the resonances in the spectra correspond to excitations of substrate-induced multipolar modes in the particle-substrate system. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000085314700008 L2 - multipole plasmon;metal particles;ADSORBED OVERLAYERS; TRUNCATED SPHERE; POLARIZABILITY; SUBSTRATE; REFLECTANCE SO - Physica B-Condensed Matter 2000 ;279(1-3):25-28 195 UI - 15279 AU - Beligiannis A AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoBeligiannis, A, Univ Aegean, Dept Math, Karlovassi 83200, Samos, Greece TI - The homological theory of contravariantly finite subcategories: Auslander-Buchweitz contexts, Gorenstein categories and (CO-)stabilization MH - Greece MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 16 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000089301000002 L2 - TRIANGULATED CATEGORIES; FLAT COVERS; MODULES; ALGEBRAS SO - Communications in Algebra 2000 ;28(10):4547-4596 196 UI - 15086 AU - Belkova NV AU - Bakhmutova EV AU - Shubina ES AU - Bianchini C AU - Peruzzini M AU - Bakhmutov VI AU - Epstein LM AD - AN Nesmeyanov Organoelement Cpds Inst, Moscow 117813, RussiaCNR, Ist Studio Stereochim & Energet Composti Coor, I-50132 Florence, ItalyIPN, Dept Chem, Ctr Invest & Estud Avanzados, Mexico City 07000, DF, MexicoBianchini, C, AN Nesmeyanov Organoelement Cpds Inst, Vavilovstr 28, Moscow 117813, Russia TI - The energy profile of proton transfer from Bronsted acids to terminal hydrides in transition metal complexes can be estimated by combining in situ IR and NMR spectroscopy AB - The enthalpy and entropy changes relative to the stepwise reaction of [(triphos)Re(CO)(2)H] with perfluoro-tert-butyl alcohol in CH2Cl2 to give first the hydrogen-bonded adduct [(triphos)Re(CO)(2)H...HOC(CF3)(3)] and then the stable nonclassical dibydrogen complex [(triphos)Re(CO)(2)(eta(2)-H-2)](+) have been estimated by a combination of in situ IR and NMR experiments in the temperature range from 200 to 260 K [triphos = MeC(CH2PPh2)(3)] MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000089837900004 L2 - hydrides;hydrogen bonding;rhenium;IR spectroscopy;NMR spectroscopy;DOT-H-OR; DIHYDROGEN COMPLEXES; HYDROGEN; KINETICS; DONORS SO - European Journal of Inorganic Chemistry 2000 ;(10):2163-2165 197 UI - 14972 AU - Ben Youssef C AU - Guillou V AU - Olmos-Dichara A AD - Inst Politecn Nacl, Ctr Invest Computac, Unidad Profes Adolfo Lopez Mateos, Mexico City 07738, DF, MexicoCNRS, UMR 5504, Ctr Bioingn Gilbert Durand, F-31077 Toulouse 4, FranceINRA, Inst Natl Sci Appl, F-31077 Toulouse 4, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoBen Youssef, C, Inst Politecn Nacl, Ctr Invest Computac, Unidad Profes Adolfo Lopez Mateos, Calle Juan Dios Batiz S-N,Col Nueva Ind Vallejo, Mexico City 07738, DF, Mexico TI - Modelling and adaptive control strategy in a lactic fermentation process AB - The modelling and design of an adaptive control strategy for lactic acid production in a continuous-flow two-stage reactor is reported. First, the medium enrichment effect, only recently investigated, is explicitly taken into account to derive an experimental model validated in batch cultures. Then, the control objective, which relies on a trade-off between total substrate depletion and optimal productivity, is stated according to economic imperatives of lactic acid production optimisation. A preliminary steady-state analysis allows the control objective to be formulated in terms of substrate supply regulation. Due to the practical importance of achieving applicable control, an adaptive-multivariable predictive-control law, where only the process output is needed and where the specific rate parameters are considered as time-varying, is proposed. Evaluation by simulation shows the efficiency and feasibility of such a control system. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0967-0661 UR - ISI:000165081600008 L2 - process modelling;adaptive control;multivariable control;process parameter estimation;fermentation process;LACTOBACILLUS-HELVETICUS; PREDICTIVE CONTROL; ACID PRODUCTION; WHEY PERMEATE; CELL-RECYCLE; LACTATE FERMENTATION; CONTINUOUS CULTURE; YEAST EXTRACT; BATCH CULTURE; GROWTH SO - Control Engineering Practice 2000 ;8(11):1297-1307 198 UI - 14751 AU - Benet L AU - Izrailev FM AU - Seligman TH AU - Suarez-Moreno A AD - UNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoBUAP, Inst Fis, Puebla 72570, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoBenet, L, Max Planck Inst Kernphys, D-69117 Heidelberg, Germany TI - Semiclassical properties of eigenfunctions and occupation number distribution for a model of two interacting particles AB - Quantum-classical correspondence for the shape of eigenfunctions, local spectral density of states and occupation number distribution is studied in a chaotic model of two coupled quartic oscillators. In particular, it is shown that both classical quantities and quantum spectra determine global properties of occupation numbers and inverse participation ratio. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000165728100005 L2 - eigenfunction shape;local density of states;inverse participation ratio;quantum-classical correspondence;FINITE FERMI SYSTEMS; STATISTICAL-THEORY; STATES; CHAOS; SPACE; THERMALIZATION SO - Physics Letters A 2000 ;277(2):87-93 199 UI - 15256 AU - Benet L AU - Seligman TH AD - UNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoBenet, L, Max Planck Inst Kernphys, Postfach 103980, D-69117 Heidelberg, Germany TI - Generic occurrence of rings in rotating systems AB - In rotating scattering systems, the generic saddle-center scenario leads to stable islands in phase space. Non-interacting particles whose initial conditions are defined in such islands will be trapped and form rotating rings. This result is generic and also holds for systems quite different from planetary rings. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000089283700008 L2 - rings;rotating scattering systems;stable orbits;saddle-center bifurcations;CHAOTIC SCATTERING; SATURN SO - Physics Letters A 2000 ;273(5-6):331-337 200 UI - 14846 AU - Benintende GB AU - Lopez-Meza JE AU - Cozzi JG AU - Piccinetti CF AU - Ibarra JE AD - Inst Nacl Tecnol Agropecuaria, Inst Microbiol & Zool Agricola, RA-1712 Castelar, ArgentinaUniv Michoacana, Ctr Multidisciplinario Estud Biotecnol, Morelia, Michoacan, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioquim, Irapuato 36500, Guanajuato, MexicoBenintende, GB, Inst Nacl Tecnol Agropecuaria, Inst Microbiol & Zool Agricola, CC 25, RA-1712 Castelar, Argentina TI - Characterization of INTA 51-3, a new atypical strain of Bacillus thuringiensis from Argentina AB - Several isolates of Bacillus thuringiensis native to Argentina obtained in a nationwide screening program showed atypical crystal morphology. One of these strains, INTA 51-3, was further characterized in order to determine other features like protein composition of its parasporal crystal, plasmid pattern, identification of cry genes and toxicological properties. B. thuringiensis INTA 51-3 (serovar tohokuensis) had an amorphous inclusion containing a major protein component of cn. 130 kDa. After trypsin digestion of solubilized crystals, SDS-PAGE resolved a unique protease-resistant peptide of ca. 90 kDa. The plasmid pattern from INTA 51-3 resembled that of the standard strain HD-1. However, Southern analysis showed no hybridization to fragments of cry1Aa, cry2Aa, cry3A, and cry11A genes. Degenerate primers were used for identification of the cry1 genes by PCR. Nevertheless, the presence of cry1 type gene(s) in B. thuringiensis INTA 51-3 was confirmed. Highly concentrated crystal suspensions showed to be weakly toxic only to lepidopteran species MH - Argentina MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000165497400005 L2 - LARVICIDAL ACTIVITY; CRYSTAL PROTEINS; INSECTS SO - Current Microbiology 2000 ;41(6):396-401 201 UI - 15693 AU - Benz BF AU - Cevallos J AU - Santana F AU - Rosales J AU - Graf S AD - Texas Wesleyan Univ, Dept Biol, Ft Worth, TX 76105, USAUniv Guadalajara, Inst Manantlan Ecol & Conservac Biodiversidad, Autlan 48900, Jalisco, MexicoInst Nacl Ecol Secretario Medio Ambiente, Direcc Reserva Biosfera Sierra Manantlan, Autlan 48900, Jalisco, MexicoBenz, BF, Texas Wesleyan Univ, Dept Biol, Ft Worth, TX 76105, USA TI - Losing knowledge about plant use in the Sierra de Manantlan biosphere reserve, Mexico AB - The purpose of this paper is to document relationships between knowledge of plant use and indicators of modernization in Mexico. The model we are resting envisions increasing loss of plant use knowledge with increasing modernization indicated by loss of indigenous language and acquisition of nontraditional community services such as literacy and quality of housing. As predicted, we demonstrate that empirical knowledge about plant use is both more diverse and more evenly shared by people speaking an indigenous language - the Huastec - than by mestizo and Spanish-speaking indigenous populations in the Sierra de Manantlan. Our analyses also indicate that the adoption of modern community services by eight rural communities in the Sierra de Manantlan of western Mexico has had notable effects eroding traditional knowledge about useful plants in some but not all communities. From this we suggest that even though traditional knowledge about plants probably suffered a decline that accompanied loss of the indigenous language in Manantlan, traditional knowledge may be able to survive the modernization process today where such knowledge has an important role in subsistence MH - Mexico|Jalisco MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 28 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000088062600009 L2 - ethnobotany;erosion of cultural knowledge;Sierra de Manantlan;Mexico;socioeconomic marginality;INDIGENOUS KNOWLEDGE; HYPOTHESES; FOREST SO - Economic Botany 2000 ;54(2):183-191 202 UI - 15248 AU - Beran DD AU - Masters RA AU - Gaussoin RE AU - Rivas-Pantoja F AD - Univ Nebraska, USDA ARS, Lincoln, NE 68583, USAUniv Nebraska, Dept Agron, Lincoln, NE 68583, USAUniv Nebraska, Dept Hort, Lincoln, NE 68583, USAInst Nacl Invest Forestales & Agropecuarias, Merida, Yucatan, MexicoMasters, RA, Univ Nebraska, USDA ARS, Lincoln, NE 68583, USA TI - Establishment of big bluestem and Illinois bundleflower mixtures with imazapic and imazethapyr AB - Weeds interfere with establishment of native grasses and legumes. A study was conducted to determine the influence of imazapic(1) [(+/-)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl] -5-methyl-3-pyridinecarboxylic acid] and imazethapyr [2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]5-ethy l-3-pyridinecarboxylic acid] on weed control and establishment of 'Pawnee' big bluestem (Andropogon gerardii Vitman var. gerardii Vitman) and Illinois bundleflower [Desmanthus illinoensis (Michx,) MacMill.] planted in three binary mixtures of 220:110, 165:165, and 110:220 pure live seed (PLS) m(-2). Mixtures were seeded st cropland sites near Clay Center, Mead, and Lincoln, NE. Imazapic and imazethapyr were applied at 70 g a.i. ha(-1) before planted species emerged. Imazapic or imazethapyr did not reduce dry matter yields of annual grass weeds, where herbicides were applied in April 1996 at Mead and Clay Center. Both grass and broadleaf weeds were controlled at Lincoln, where herbicides were applied in early June 1996, The herbicides usually improved big bluestem yields and total forage yields in 1996 and 1997 at all sites. Illinois bundleflower yields at Lincoln, where imazapic and imazethapyr were applied, were greater than 3.0 Mg ha(-1) in 1996 and 1997. In 1997, Illinois bundleflower did not survive at Mead and yielded less than 0.5 Mg ha(-1) at Clay Center, regardless of weed control treatment or seed mixture. Imazapic and imazethapyr can improve the establishment of big bluestem and Illinois bundleflower mixtures MH - Mexico|Yucatan MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 12 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000089408000010 L2 - SWITCHGRASS; HERBICIDES; CULTIVARS; ATRAZINE; PRAIRIE; YIELD SO - Agronomy Journal 2000 ;92(3):460-465 203 UI - 14758 AU - Bergamin JM AU - Bountis T AU - Jung C AD - Univ Patras, Dept Math, Patras 26500, GreeceUniv Patras, Ctr Applicat Nonlinear Syst, Patras 26500, GreeceUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoBergamin, JM, Univ Patras, Dept Math, Patras 26500, Greece TI - A method for locating symmetric homoclinic orbits using symbolic dynamics AB - In this paper we present a method which can identify and locate symmetric homoclinic orbits in a homoclinic tangle formed by the intersecting stable and unstable manifolds of a symmetric 2D map. The method consists of a systematic search in parameter space and determination of the order in which these orbits arise using symbolic dynamics. Each orbit corresponds to a unique sequence and it is computed by iterating the map along the unstable manifold to match a specific symmetry at the middle of the orbit. An application of the method to the determination of multibreather solutions of 1D lattices is discussed MH - Greece MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000165753400008 L2 - NONLINEAR SCHRODINGER-EQUATION; WEAKLY COUPLED OSCILLATORS; INTRINSIC LOCALIZED MODES; SOLITON-LIKE SOLUTIONS; DISCRETE BREATHERS; NUMERICAL COMPUTATION; HAMILTONIAN NETWORKS; LINEAR-STABILITY; SYSTEMS; EXISTENCE SO - Journal of Physics A-Mathematical and General 2000 ;33(45):8059-8070 204 UI - 15177 AU - Bergues JM AU - Betancourt-Riera R AU - Riera R AU - Marin JL AD - Sonoma State Univ, Dept Fis, Hermosillo 83000, Sonora, MexicoUniv Oriente, Dept Fis, Santiago, CubaUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoBergues, JM, Sonoma State Univ, Dept Fis, Apartado Postal 1626, Hermosillo 83000, Sonora, Mexico TI - One-phonon-assisted electron Raman scattering in quantum well wires and free-standing wires AB - The differential cross section for an electron Raman scattering process in a semiconductor quantum well wire (QWW) and in a free-standing wire of cylindrical geometry involving phonon-assisted transitions is calculated for T = 0 K. A complete description of the phonon modes of cylindrical structures embedded in another material, including a correct treatment of the mechanical and electrostatic matching conditions at the surface, is presented We consider the Frohlich interaction to illustrate the theory for a GaAs/AlAs system. Electron states are considered to be confined within a QWW with finite and infinite potential barriers. We also assume single parabolic conduction and valence bands. The emission spectra are discussed for different scattering Configurations and the selection rules for the processes; are also studied. Singularities in the spectra are found and interpreted MH - Cuba MH - Mexico|Sonora PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000089474700014 L2 - POLAR-OPTICAL OSCILLATIONS; GAAS-ALAS SUPERLATTICES; SEMICONDUCTOR SUPERLATTICES; MODES; DOTS; PHOTOLUMINESCENCE; FIELD SO - Journal of Physics-Condensed Matter 2000 ;12(36):7983-7998 205 UI - 15148 AU - Berkove E AU - Farrell FT AU - Juan-Pineda D AU - Pearson K AD - Lafayette Coll, Dept Math, Easton, PA 18042, USASUNY Binghamton, Dept Math, Binghamton, NY 13902, USAInst Matemat, Morelia 58089, Michoacan, MexicoUniv Valparaiso, Dept Math & Comp Sci, Valparaiso, IN 46383, USABerkove, E, Lafayette Coll, Dept Math, Easton, PA 18042, USA TI - The Farrell-Jones Isomorphism Conjecture for finite covolume hyperbolic actions and the algebraic K-theory of Bianchi groups AB - We prove the Farrell-Jones Isomorphism Conjecture for groups acting properly discontinuously via isometries on(real) hyperbolic n-space H-n with finite volume orbit space. We then apply this result to show that, for any Bianchi group Gamma, Wh(Gamma), (K) over tilde(0)(Z Gamma), and K-i(Z Gamma) vanish for i less than or equal to -1 MH - Mexico|Michoacan MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000089544700011 L2 - K-theory;discrete groups;MAPS SO - Transactions of the American Mathematical Society 2000 ;352(12):5689-5702 206 UI - 15815 AU - Berman GP AU - Doolen GD AU - Lopez GV AU - Tsifrinovich VI AD - Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Fis, Guadalajara 44430, Jalisco, MexicoPolytech Univ, IDS Dept, Brooklyn, NY 11201, USABerman, GP, Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA TI - Simulations of quantum-logic operations in a quantum computer with a large number of qubits AB - We report the simulations of the dynamics of quantum-logic operations with large number of qubits (up to 1000). A nuclear-spin chain in which selective excitations of spins are provided by the gradient of the external magnetic field is considered. The spins interact with their nearest neighbors. We simulate the quantum controlled-Nor (CN) gate implementation for remote qubits, which provides the long-distance entanglement. Our approach can be applied to any implementation of quantum-logic gates involving a large number of qubits MH - USA MH - Mexico|Jalisco PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000087567900024 L2 - SPIN-DIFFUSION; LATTICE; COMPUTATION; DYNAMICS SO - Physical Review A 2000 ;6106(6): 207 UI - 16187 AU - Berman GP AU - Doolen GD AU - Lopez GV AU - Tsifrinovich VI AD - Univ Calif Los Alamos Natl Lab, CNLS, Div Theoret, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Fis, Guadalajara 44430, Jalisco, MexicoPolytech Univ, IDS Dept, Brooklyn, NY 11201, USABerman, GP, Univ Calif Los Alamos Natl Lab, CNLS, Div Theoret, POB 1663, Los Alamos, NM 87545 USA TI - Nonresonant effects in the implementation of the quantum Shor algorithm AB - We simulate Shor's algorithm using the Ising spin quantum computer. The influence of nonresonant effects is analyzed in detail. It is shown that the method developed earlier in our papers successfully suppresses nonresonant effects even for relatively large values of the Rabi frequency MH - Mexico|Jalisco MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000086313300029 L2 - COMPUTATION; COMPUTER SO - Physical Review A 2000 ;6104(4): 208 UI - 16491 AU - Berman GP AU - James DFV AU - Hughes RJ AU - Gulley MS AU - Holzscheiter MH AU - Lopez GV AD - Univ Calif Los Alamos Natl Lab, Grp T13, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, Grp T4, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, Grp P23, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, Grp P25, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoBerman, GP, Univ Calif Los Alamos Natl Lab, Grp T13, POB 1663, Los Alamos, NM 87545 USA TI - Dynamical stability and quantum chaos of ions in a linear trap AB - The realization of a paradigm chaotic system, namely, the harmonically driven oscillator, in the quantum domain using cold trapped ions driven by lasers is theoretically investigated. The simplest characteristics of regular and chaotic dynamics are calculated. The possibilities of experimental realization are discussed MH - Mexico|Jalisco MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000085336900082 L2 - KICKED HARMONIC-OSCILLATOR; NONLINEAR RESONANCE; DIFFUSION; SYSTEMS; STATE; ATOM SO - Physical Review A 2000 ;6102(2): 209 UI - 14800 AU - Bermudez M AU - Montanez C AU - Gomez P AU - Yaffe D AU - Cisneros B AD - CINVESTAV IPN, Dept Genet & Mol Biol, Mexico City 07360, DF, MexicoWeizmann Inst Sci, Dept Cell Biol, IL-76100 Rehovot, Israel TI - The Dp71 promoter activity is down-regulated during muscle cell differentiation MH - Israel MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400701047 SO - American Journal of Human Genetics 2000 ;67(4):195-195 210 UI - 15357 AU - Bernal-Alvarado J AU - Vargas-Luna M AU - Solorza-Feria O AU - Mondragon R AU - onso-Vante N AD - Univ Guanajuato, Inst Fis, Leon 37000, Gto, MexicoInst Politecn Nacl, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoUniv Poitiers, Lab Electrocatalysis, CNRS, UMR 6503, F-86022 Poitiers, FranceBernal-Alvarado, J, Univ Guanajuato, Inst Fis, AP E-143, Leon 37000, Gto, Mexico TI - Photoacoustic characterization of n-RuSe2 semiconductor pellets AB - Using the open photoacoustic cell technique, a set of physical properties for a semiconductor (n-RuSe2) in powder form was measured. According to the Dramicanin theoretical model, charge carriers transport parameters (bulk and surface) and the effective thermal diffusivity were obtained. (C) 2000 American Institute of Physics. [S0021- 8979(00)08317-1] MH - France MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000089034700098 L2 - TRANSPORT; CRYSTAL; SYSTEM; RUSE2 SO - Journal of Applied Physics 2000 ;88(6):3771-3772 211 UI - 14896 AU - Bernal-Uruchurtu MI AU - Ruiz-Lopez MF AD - Univ Nancy 1, UMR CNRS UHP 7565, Chim Theor Lab, F-54506 Vandoeuvre Les Nancy, FranceUniv Autonoma Estado Morelos, Ctr Invest Quim, Morelos, MexicoRuiz-Lopez, MF, Univ Nancy 1, UMR CNRS UHP 7565, Chim Theor Lab, BP 239, F-54506 Vandoeuvre Les Nancy, France TI - Basic ideas for the correction of semiempirical methods describing H-bonded systems AB - In this Letter, we show how semiempirical methods may be improved to describe hydrogen-bonded systems and proton transfer reactions. The approach consists in a redefinition of the core-core interaction terms that, as previously shown, are at the origin of spurious artifacts in standard methods. The parameterization of the new core-core functions is done using ab initio data of the intermolecular potential energy surfaces (PESs), which permits reaching the correct behavior at short and long interatomic distances. Here we report the parameters for O-O, O-H and H-H interactions. Extension to other atom pairs seems feasible, so the development of a semiempirical method adapted to the study of intermolecular interactions might be envisaged. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000165249100018 L2 - WATER; MODEL; AM1 SO - Chemical Physics Letters 2000 ;330(1-2):118-124 212 UI - 16113 AU - Bernal-Uruchurtu MI AU - Martins-Costa MTC AU - Millot C AU - Ruiz-Lopez MF AD - Univ Nancy 1, CNRS, UMR 7656, Chim Theor Lab,UHP,Inst Nanceien Chim Mol, F-54506 Vandoeuvre Nancy, FranceUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca, Morelos, MexicoRuiz-Lopez, MF, Univ Nancy 1, CNRS, UMR 7656, Chim Theor Lab,UHP,Inst Nanceien Chim Mol, BP 239, F-54506 Vandoeuvre Nancy, France TI - Improving description of hydrogen bonds at the semiempirical level: Water-water interactions as test case AB - Hydrogen bonding is not well described by available semiempirical theories. This is an important restriction because hydrogen bonds represent a key feature in many chemical and biochemical processes, besides being responsible for the singular properties of water. In this study, we describe a possible solution to this problem. The basic idea is to replace the nonphysical gaussian correction functions (GCF) appearing in the core-core repulsion terms of most MNDO-based semiempirical methods by a simple function exhibiting the correct physical behavior in the whole range of intermolecular separation distances. The parameterized interaction function (PIF) is the sum of atom-pair contributions, each one having five adjustable parameters. In this work, the approach is used to study water-water interactions. The parameters are optimized to reproduce a reference ab initio intermolecular energy surface for the water-water dimer obtained at the MP2/aug-cc-pVQZ level. OO, OH, and HH parameters are reported for the PM3 method. The results of PMS-PIF calculations remarkably improve qualitatively and quantitatively those obtained at the standard PM3 level, both for water-dimer properties and for water clusters up to the hexamer. For example, the root-mean-square deviation of the PM3-PIF interaction energies, with respect to ab initio values obtained using 700 paints of the water dimer surface, is only 0.47 kcal/mol. This value is much smaller than that obtained using the standard PM3 method (4.2 kcal/mol). The PM3-PLF water dimer energy minimum ( 5.0 kcal/mol) is also much closer to ab initio data ( 5.0 +/- 0.01 kcal/mol) than PM3 ( 3.50 kcal/mol). The method is therefore promising for the development of new semiempirical approaches as well as for application of combined quantum mechanics and molecular mechanicstechniques to investigate chemical processes in water. (C) 2000 John Wiley & Sons, Inc MH - France MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 32 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000086677400006 L2 - molecular interactions;hydrogen bonds;semiempirical methods;parameterizable interaction function;water dimer;AB-INITIO CALCULATIONS; CONFORMATIONAL-ANALYSIS; BINDING-ENERGIES; CORE-REPULSION; BASIS-SETS; CAGE FORM; CLUSTERS; DIMER; HEXAMER; SPECTRA SO - Journal of Computational Chemistry 2000 ;21(7):572-581 213 UI - 16324 AU - Bernal J AU - Harmony T AU - Rodriguez M AU - Reyes A AU - Yanez G AU - Fernandez T AU - Galan L AU - Silva J AU - Fernandez-Bouzas A AU - Rodriguez H AU - Guerrero V AU - Marosi E AD - Univ Nacl Autonoma Mexico, ENEP Iztacala, Lab Neurometria Proy Neurociencias, Mexico City, DF, MexicoCtr Neurosci, La Habana, CubaBernal, J, Univ Nacl Autonoma Mexico, ENEP Iztacala, Lab Neurometria Proy Neurociencias, Manuel Fernando Soto 68,Col Constituc Republ, Mexico City, DF, Mexico TI - Auditory event-related potentials in poor readers AB - Although poor readers (PR) are considered the major group among reading-disabled children, there are not event-related potentials (ERP) studies reported of PR on the subject. In this study, attentional and memory processes were studied in an auditory oddball task in PR and normal controls. ERP to auditory stimuli were recorded in 19 leads of the 10/20 system, using linked earlobes as references, in 20 normal children (10 female) and 20 PR (10 female) of the same age(10-12 years old). Two pure tones (1000 and 3000 Hz) were used in an oddball paradigm. No significant differences were observed in the amplitudes and latencies of N100 between the groups. However, N200 to frequent stimuli and P200 to both frequent and infrequent stimuli were of higher amplitude in poor readers than in normal children. There were no differences between groups in the latency and amplitude of P300. The results suggest that PR use more attentional resources in the components occurring before P300 to both frequent and infrequent stimuli than the normal children, and this finding is particularly marked for PR girls. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Psychology, Biological;Neurosciences;Physiology;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 0167-8760 UR - ISI:000085978200002 L2 - P300;auditory event-related potentials;poor readers;reading disabilities;sex differences;DEVELOPMENTAL DYSLEXIA; WORKING-MEMORY; BRAIN POTENTIALS; CHILDREN; ATTENTION; DYSFUNCTIONS; ADULTS; BOYS; P300; DISABILITIES SO - International Journal of Psychophysiology 2000 ;36(1):11-23 214 UI - 15958 AU - Beron-Vera FJ AU - Ripa P AD - Ctr Invest Cient & Educ Super Ensenada, Dept Oceanog Fis, Ensenada, Baja California, MexicoBeron-Vera, FJ, CICESE, Dept Phys Oceanog, POB 434844, San Diego, CA 92143 USA TI - Three-dimensional aspects of the seasonal heat balance in the Gulf of California AB - Previously unresolved three-dimensional aspects of the time mean, as well as the annual and semiannual cycles of the heat transport, ari studied in the Gulf of California using a minimal box model suggested by the hydrographic data. At the very least three horizontal domains are needed for the model a shallow region north of the big islands, a deep region identifiable with the Ballenas Channel, and another deep region spanning the rest of the gulf south of the archipelago. Only one vertical layer is considered in the northern region, whereas two layers are taken into account in the other two regions. Out of all of the possible heat exchanges among the various boxes of the model, the least-flux-variance solution is considered. The annual mean heat entering the surface in the northern region is exported in almost equal amounts to the Ballenas Channel and the southern region. Ballenas Channel, in turn, exports heat to the southern region mainly through the lower layer, producing a transversal asymmetry of the mouthward flux into the upper layer. At the mouth the heat is exported to the Pacific Ocean largely through the upper layer. Both the annual and semiannual amplitude of the exchanges between all regions are as important as the annual average, except at the mouth of the gulf, where the semiannual component is not statistically relevant. The Pacific Ocean fluxes estimates at the annual frequency agree well with those produced by a baroclinic wave, which has been shown to explain a bit; deal of the thermodynamics of the gulf. The annual mean vertical flux per unit horizontal area in the Ballenas Channel is much larger than that in the southern region. This reinforces previous speculations that mixing processes in this region are very important. A depth-independent eddy diffusivity parameterization suggests that diffusion might not be invoked to explain the annual, mean vertical flux in the Ballenas Channel MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000087153000014 L2 - OF-CALIFORNIA; VARIABILITY SO - Journal of Geophysical Research-Oceans 2000 ;105(C5):11441-11457 215 UI - 15994 AU - Berrocal-Tito GM AU - Rosales-Saavedra T AU - Herrera-Estrella A AU - Horwitz BA AD - Technion Israel Inst Technol, Dept Biol, IL-32000 Haifa, IsraelIPN, Ctr Invest & Estud Avanzados, Dept Plant Genet Engn, Irapauto, MexicoHorwitz, BA, Technion Israel Inst Technol, Dept Biol, IL-32000 Haifa, Israel TI - Characterization of blue-light and developmental regulation of the photolyase gene phr1 in Trichoderma harzianum AB - Blue light and development regulate the expression of the phr1 gene of the filamentous fungus Trichoderma harzianum. The predicted product of phr1, the DNA repair enzyme photolyase, is likely to help protect Trichoderma, which grows in the soil as a mycoparasite or saprophyte, from damage upon emergence and exposure to ultraviolet-c, phr1 is transiently expressed in mycelium and conidiophores after illumination, phr1 mRNA also accumulates in conidiophores during development and spore maturation. As no other genes displaying rapid, direct Light regulation have been described previously in this organism, we have characterized the fluence and time dependence of phr1 induction, and its relation to sporulation and photoreactivation, Induction is transient following a pulse, and, with slower decay, in continuous Light. This implies that the photoreceptor, transducers or response are capable of adaptation. About two-fold more light is required to induce phr1 than conidiation, but this difference is modest, so both responses could use the same or similar chromophore. Adenosine 3':5'-cyclic monophosphate bypasses the requirement for light for sporulation, while atropine prevents sporulation even after photoinduction, Light regulation of phr1, however, is indifferent to both these effecters. Induction of photolyase expression behaves as a direct, rapid response to light, independent of the induction of sporulation. Indeed, illumination of mature spores increases their capacity for photoreactivation, Blue Light seems to warn the organism against the harmful effects of short wavelengths, inducing phr1 expression and sporulation by pathways that are, at least in part, distinct MH - Israel MH - Mexico|Guanajuato PB - AUGUSTA: AMER SOC PHOTOBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0031-8655 UR - ISI:000086989700022 L2 - PYRIMIDINE DIMER PHOTOLYASE; PROTEINASE-ENCODING GENE; CULTURED FISH CELLS; NEUROSPORA-CRASSA; DIFFERENTIAL REGULATION; PHOTORECEPTOR; CRYPTOCHROME; EXPRESSION; INDUCTION; PHOTOREACTIVATION SO - Photochemistry and Photobiology 2000 ;71(5):662-668 216 UI - 14663 AU - Berrocal M AU - Ball AS AU - Huerta S AU - Barrasa JM AU - Hernandez M AU - Perez-Leblic MI AU - Arias ME AD - Univ Alcala, Dept Microbiol & Parasitol, Madrid 28871, SpainUniv Essex, Dept Biol Sci, Colchester CO4 3SQ, Essex, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 55535, DF, MexicoUniv Alcala, Dept Biol Vegetal, Madrid 28871, SpainArias, ME, Univ Alcala, Dept Microbiol & Parasitol, Madrid 28871, Spain TI - Biological upgrading of wheat straw through solid-state fermentation with Streptomyces cyaneus AB - The biological upgrading of wheat straw with Streptomyces cyaneus was examined through the analysis of chemical and structural changes of the transformed substrate during solid-state fermentation. Analysis of enzymes produced during the growth of S. cyaneus showed that phenol oxidase was the predominant enzyme. The reduction in Klason lignin content (16.4%) in the transformed substrate indicated the ability of this strain to delignify lignocellulose residues and suggests a role for phenol oxidase in the bacterial delignification process. Microscopic examination of the transformed substrate showed that the initial attack occurred at the less lignified cell walls (phloem and parenchyma), while xylem and sclerenchyma were slowly degraded. The pattern of degradation of sclerenchymatic tissues by S. cyaneus showed delamination between primary and secondary walls and between S-1 and S-2 due to partial removal of lignin. In the later stages of the decay a disorganization of the secondary walls was detected on account of fibrillation of this layer. A comparison of the properties of the pulp from wheat straw transformed by S. cyaneus with untreated wheat straw showed that pretreatment improved the characteristics that determine the quality of pulp. This was indicated by an increase in pulp brightness and by a decrease in the kappa number. These changes occurred without significantly affecting the viscosity, a measure of the quality of the cellulose fibres. These results support the potential application of this organism or its oxidative enzymes in biopulping MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000166044200005 L2 - PHANEROCHAETE-CHRYSOSPORIUM; CERIPORIOPSIS-SUBVERMISPORA; ULTRASTRUCTURAL ASPECTS; LIGNIN; LIGNOCELLULOSE; SOLUBILIZATION; DEGRADATION; PULP; MINERALIZATION; PAPERMAKING SO - Applied Microbiology and Biotechnology 2000 ;54(6):764-771 217 UI - 16231 AU - Berumen S AU - Tiab D AU - Rodriguez F AD - PEMEX E&P, Coyoacan 04510, MexicoUniv Nacl Autonoma Mexico, Coyoacan 04510, MexicoUniv Oklahoma, Sch Petr & Geol Engn, Norman, OK 73019, USABerumen, S, PEMEX E&P, Ciudad Univ,Postal 70-256, Coyoacan 04510, Mexico TI - Constant rate solutions for a fractured well with an asymmetric fracture AB - This paper presents solutions for the pressure response on hydraulically fractured wells flowing at constant flow rate through an asymmetric vertical fracture. The pressure behavior of wells intercepting asymmetric fractures of both infinite and finite conductivity was investigated by solving numerically and analytically the mathematical model. The new solutions developed for the dimensionless wellbore pressure under production at constant flow rate are presented in terms of an asymmetry factor xi. New curves for these systems were generated and the deviation from the classical solution was readily detected. Some qualitative criteria to interpret the intensity of this effect are provided. Results of our investigation indicated that at early times for fractures of moderate conductivity (C-D < 5) the characteristic slope of one fourth is present, except for cases of strong asymmetry (0.85 < xi less than or equal to 1) where no evidence of straight line having one fourth slope was observed. However, it was also detected that at intermediate fracture conductivities (5 < C-D < 50), even the case of complete asymmetry shows the characteristic slope of one fourth. It was also observed that as the asymmetry factor increases, the end of the bilinear flow occurs earlier. Our results are relevant in improving the fracture characterization of fractured wells. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0920-4105 UR - ISI:000086313000005 L2 - petroleum engineering;fracture conductivity;pressure analysis;asymmetric fractures;constant rate SO - Journal of Petroleum Science and Engineering 2000 ;25(1-2):49-58 218 UI - 14891 AU - Besana A AU - Rocchetti M AU - Gurrola GB AU - Zaza A AD - Univ Milano Bicocca, Dipartimento Biotecnol & Biosci, Milan, ItalyUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62191, Morelos, Mexico TI - Rate-dependency of IKr and IKs during the ventricular action potential: implications for the mechanism of "reverse use-dependency" MH - Italy MH - Mexico|Morelos PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000089136600242 SO - European Heart Journal 2000 ;21():63-63 219 UI - 15993 AU - Beuschel T AU - Hirsch JG AU - Draayer JP AD - Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBeuschel, T, Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA TI - Scissors mode and the pseudo-SU(3) model AB - The low-lying M1 transition strength distributions observed in rare earth and actinide nuclei reflects on both the collective and noncollective aspects of the nuclear interaction. As shown in this article, the pseudo-SU(3) model can accommodate these complementary features and provides a natural interpretation for different aspects of this "scissors" mode MH - USA MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000086953000019 L2 - MAGNETIC DIPOLE EXCITATIONS; DEFORMED-NUCLEI; SHELL-MODEL; SCATTERING SO - Physical Review C 2000 ;6105(5): 220 UI - 16482 AU - Bhalekar AA AD - Nagpur Univ, Dept Chem, Nagpur 440010, Maharashtra, IndiaUAM, Iztapalapa, MexicoIACS, Calcutta, W Bengal, India TI - On the irreversible thermodynamic framework for closed systems consisting of chemically reactive components AB - A methodology has been described to develop an irreversible thermodynamic framework based on the laws of thermodynamics and exemplified by applying it to a spatially uniform chemically reacting closed system with no irreversibility in the energy exchanges. It is shown thar if in the Gibbs relation the chemical composition determining extensive parameters appear as independent thermodynamic variables and if their variation includes the changes due to chemical reaction, then it, in fact, is an irreversible thermodynamic description. The de Donderian thermodynamic framework is basically a nonequilibrium description in which the chemical affinity containing term is the manifestation of the irreversibility in chemical interactions. This confirms that the Gibbs function primarily takes care of the chemical interactions and hence the quantification of the irreversibility in the latter need to be achieved through the former function by identifying its suitable expression MH - India MH - Mexico|Distrito Federal PB - SAHIBABAD: MRS PUSHPA AGARWAL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0970-7077 UR - ISI:000085448500020 L2 - NONEQUILIBRIUM TEMPERATURE; EXTENDED THERMODYNAMICS; TRANSPORT PROCESSES; REALITY; CHECK SO - Asian Journal of Chemistry 2000 ;12(2):433-444 221 UI - 16035 AU - Bhaud M AU - Fernandez-Alamo MA AD - Univ Paris 06, CNRS, Observ Oceanol Banyuls, F-66651 Banyuls sur Mer, FranceUniv Nacl Autonoma Mexico, Fac Ciencias, Lab Invertebrados, Mexico City 04510, DF, MexicoBhaud, M, Univ Paris 06, CNRS, Observ Oceanol Banyuls, BP 44, F-66651 Banyuls sur Mer, France TI - Planktonic larvae of Spiochaetopterus in the Gulf of California: New evidence that the geographic distribution of species with a long planktonic larval life is relatively restricted (Polychaeta, Chaetopteridae) AB - Polychaete larvae were sorted fi-om a collection of 116 zooplankton samples taken in 76 localities during the GOLCA 84-04 cruise in March-April 1984. Two morphologies were identified in the Chaetopreridae genus Spiochaetopterus: larval types I and II. The morphology of A4 setae dissected from the larvae is compared with A4 setae of erected species from the Pacific. Larvae of Spiochaetopterus type I could belong to S. monroi. From local observation of adults and larvae, and comparison with the first species described in the genus: S. costarum, it appears that this species is not present in the Gulf of California. Although S. costarum was for a long time credited with a widespread distribution throughout the world because of its long planktonic larval development, it is now acknowledged that many reported occurrences were in-correctly attributed to S. costarum, and in consequence its specific area has been restricted ill recent years. This paper confirms that the setal morphology of larvae and adults is very helpful in the identification of planktonic larval stages MH - France MH - Mexico|Distrito Federal PB - STENSTRUP: OPHELIA PUBLICATIONS RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0078-5326 UR - ISI:000086898200007 L2 - Polychaeta;Chaetopteridae;Spiochaetopterus;larvae;Gulf of California SO - Ophelia 2000 ;52(1):65-76 222 UI - 14804 AU - Bhutta ZA AU - Bird SM AU - Black RE AU - Brown KH AU - Gardner JM AU - Hidayat A AU - Khatun F AU - Martorell R AU - Ninh NX AU - Penny ME AU - Rosado JL AU - Roy SK AU - Ruel M AU - Sazawal S AU - Shankar A AD - Johns Hopkins Sch Publ Hlth, Dept Int Hlth, Baltimore, MD 21205, USAAga Khan Univ, Med Ctr, Karachi 74800, PakistanMRC, Biostat Unit, Cambridge CB2 2BW, EnglandUniv Calif Davis, Davis, CA 95616, USAUniv W Indies, Mona, JamaicaTrisakti Univ, Jakarta, IndonesiaDhaka Med Coll, Dhaka, BangladeshEmory Univ, Atlanta, GA 30322, USANatl Inst Nutr, Hanoi, VietnamInst Nutr Res, Lima, PeruNatl Inst Nutr, Mexico City, DF, MexicoInt Ctr Diarrhoeal Dis Res, Dhaka 1000, BangladeshInst Nutr Cent Amer & Panama, Guatemala City, GuatemalaAll India Inst Med Sci, New Delhi, IndiaBlack, RE, Johns Hopkins Sch Publ Hlth, Dept Int Hlth, 615 N Wolfe St, Baltimore, MD 21205 USA TI - Therapeutic effects of oral zinc in acute and persistent diarrhea in children in developing countries: pooled analysis of randomized controlled trials AB - Background: Zinc deficiency is prevalent in children in developing countries. Supplemental zinc provides therapeutic benefits in diarrhea. Objective: We sought to measure the effect of supplemental zinc given with oral rehydration therapy during recovery from acute or persistent diarrhea. Design: We conducted pooled analyses including all available published and unpublished randomized controlled trials of the effects of supplementary oral zinc in children aged < 5 y with acute or persistent diarrhea. We used Cox survival regression analysis to evaluate the overall effect of zinc on continuation of diarrhea and possible differential effects in subgroups divided by sex, age, weight-for-height, and initial plasma zinc concentration. Dichotomous outcomes were analyzed by logistic regression. To assess the effects of excluding studies without original data from the pooled analyses, effect-size was estimated for all studies by using random-effects models. Results: Zinc-supplemented children had a 15% lower probability of continuing diarrhea on a given day (95% CI: 5%, 24%) in the acute-diarrhea trials and a 24% lower probability of continuing diarrhea (95% CI: 9%, 37%) and a 42% lower rate of treatment failure or death (95% CI: 10%, 63%) in the persistent-diarrhea trials. In none of the subgroup analyses were the 2 subgroups of each pair significantly different from each other; however, in persistent diarrhea there tended to be a greater effect in subjects aged < 12 mo, who were male, or who had wasting or lower baseline plasma zinc concentrations. Conclusion: Zinc supplementation reduces the duration and severity of acute and persistent diarrhea MH - Bangladesh MH - United Kingdom MH - Guatemala MH - India MH - Indonesia MH - Jamaica MH - USA MH - Mexico|Distrito Federal MH - Pakistan MH - Peru MH - Vietnam PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 133 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000165549000018 L2 - diarrhea;diarrheal disease;malnutrition;meta-analysis;randomized controlled trial;zinc;children;infants;developing countries;zinc supplementation;nutrition;zinc deficiency;MALNOURISHED BANGLADESHI CHILDREN; YOUNG-CHILDREN; INTESTINAL PERMEABILITY; SUPPLEMENTATION; DEFICIENCY; INFANTS; MALNUTRITION; MAGNITUDE; INFECTION; PATTERNS SO - American Journal of Clinical Nutrition 2000 ;72(6):1516-1522 223 UI - 15408 AU - Bianchi G AU - Gislason H AU - Graham K AU - Hill L AU - Jin X AU - Koranteng K AU - Manickchand-Heileman S AU - Paya I AU - Sainsbury K AU - Sanchez F AU - Zwanenburg K AD - Inst Marine Res, N-5817 Bergen, NorwayDanish Inst Fisheries Res, Univ Copenhagen, DK-2920 Charlottenlund, DenmarkNew S Wales Fisheries Res Inst, Cronulla, NSW, AustraliaIPIMAR, Lisbon, PortugalMarine Fisheries Res Div, Tema, GhanaNatl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Mexico City 04510, DF, MexicoInst Fomento Pesquero, Valparaiso, ChileCSIRO, Marine Lab, Hobart, Tas 7001, AustraliaINIDEP, Mar Del Plata, ArgentinaYellow Sea Fishery Res Inst, Qingdao, Peoples R ChinaBedford Inst Oceanog, Marine Fish Div, Dartmouth, NS, CanadaBianchi, G, Inst Marine Res, POB 1870 Nordnes, N-5817 Bergen, Norway TI - Impact of fishing on size composition and diversity of demersal fish communities AB - By analysing data sets from different world regions we add evidence to documented changes in demersal fish community structure that may be related to fishing. Changes are analysed by community properties that might be expected to capture relevant overall changes - size spectra slopes and intercepts, Shannon-Wiener diversity, and dominance. Cross-system differences in the shape of the integrated community size spectra appear to be related to ecosystem productivity. The slope of size spectra appears to respond in a consistent way to changes in exploitation levels. In most areas studied. but particularly in high-latitude regions, we observe a decreasing trend in the slope, reflecting changes in size composition toward a relative decline in larger fish. The results from tropical regions are less conclusive, partly owing to the difficulty in obtaining consistent data series, but probably also because the generally higher growth rates of the constituent species make the slope less sensitive to changes in fishing. No evidence was found of any decline in species richness, while changes in diversity (richness and evenness) were caused either by changes in patterns of dominance or by changes in the number of species identified resulting from improved survey protocols. (C) 2000 International Council for the Exploration of the Sea MH - Argentina MH - Australia MH - Canada MH - Chile MH - Denmark MH - Ghana MH - Mexico|Distrito Federal MH - Norway MH - Peoples R China MH - Portugal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 72 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1054-3139 UR - ISI:000088880200012 L2 - cross-system comparisons;diversity;fish community structure;size spectrum;NORTH-SEA; LONG-TERM; ASSEMBLAGES; SPECTRA; SHELF; GULF; CARPENTARIA; AUSTRALIA; ABUNDANCE; ATLANTIC SO - Ices Journal of Marine Science 2000 ;57(3):558-571 224 UI - 14662 AU - Bicay MD AU - Stepanian JA AU - Chavushyan VH AU - Erastova LK AU - Ayvazyan VT AU - Seal J AU - Kojoian G AD - Russian Acad Sci, Special Astrophys Observ, Karachai Cherkessia 357147, RussiaCALTECH, Jet Prop Lab, Pasadena, CA 91109, USAInst Nacl Astrofis Opt Elect, Puebla 72000, MexicoByurakan Astrophys Observ, Byurakan, ArmeniaArmenian State Pedag Inst, Dept Phys & Astron, Yerevan 375010, ArmeniaCambridge CR&D, Sidney, IL 61877, USAUniv Wisconsin, Dept Phys & Astron, Eau Claire, WI 54702, USAStepanian, JA, Russian Acad Sci, Special Astrophys Observ, Karachai Cherkessia 357147, Russia TI - Accurate optical positions for 2978 objects from the Second Byurakan Survey (SBS) with the Digitized Sky Survey AB - Optical positions of 2978 objects listed in the Second Byurakan Survey (SBS) were obtained using the Digitized Sky Survey (DSS), and are given with an rms uncertainty similar to1 arcsec in each coordinate MH - Armenia MH - Mexico|Puebla MH - Russia MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000166021400001 L2 - surveys;catalogs : active;galaxies;quasars;FINDING CHARTS; GALAXIES; QUASARS; SYSTEM SO - Astronomy & Astrophysics Supplement Series 2000 ;147(2):169-173 225 UI - 14936 AU - Bichet D AU - Lecomte C AU - Sabatier JM AU - Felix R AU - De Waard M AD - Fac Med Nord, Inst Fed Jean Roche, INSERM U464, Lab Neurobiol Canaux Ion, F-13916 Marseille 20, FranceFac Med Nord, Inst Fed Jean Roche, CNRS, UMR 6560,Lab Biochim, F-13916 Marseille, FranceIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 0700, DF, MexicoBichet, D, Fac Med Nord, Inst Fed Jean Roche, INSERM U464, Lab Neurobiol Canaux Ion, Blvd Pierre Dramard, F-13916 Marseille 20, France TI - Reversibility of the Ca2+ channel alpha(1)-beta subunit interaction AB - The auxiliary beta subunit importantly regulates voltage-dependent Ca2+ channel activity through an interaction with the AID domain, a binding site located in the cytoplasmic I-II linker of the ion-conducting alpha (1) subunit. In the present study, we used two synthetic peptides corresponding to partial. sequences of the I-II linker of alpha (1A) (AID(A)-peptides) as tools to disrupt the alpha (1)-beta interaction. In vitro binding experiments confirmed that these peptides exhibit a reasonable affinity to the neuronal beta (3) subunit to serve this purpose, although they failed to prevent immunoprecipitation of native N- and P/Q-type channels by anti-beta (3) antibodies. Together, our results (i) provide evidence for the reversibility of channel subunit association suggesting that the disruption of the alpha (1)-beta interaction may be a possible mechanism for Ca2+ channel regulation in vivo, and (ii) support a model whereby the alpha (1)-beta association is based on multiple interaction sites. (C) 2000 Academic Press MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000165214500035 L2 - Ca2+ channel;alpha(1) subunit;beta subunit;subunit interaction;DEPENDENT CALCIUM CHANNELS; PROTEIN-COUPLED RECEPTORS; BETA-SUBUNIT; ALPHA(1A) SUBUNIT; IDENTIFICATION; ANTIBODIES; BINDING; COMPLEX; DOMAIN; GAMMA SO - Biochemical and Biophysical Research Communications 2000 ;277(3):729-735 226 UI - 15288 AU - Bijker R AU - Iachello F AU - Leviatan A AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, Sloane Lab, Ctr Theoret Phys, New Haven, CT 06520, USAHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelBijker, R, UNAM, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Algebraic models of hadron structure II. Strange baryons AB - The algebraic treatment of baryons is extended to strange resonances. Within this framework we study a collective string-like model in which the radial excitations are interpreted as rotations and vibrations of the strings. We derive a mass formula and closed expressions for strong and electromagnetic decay widths and use these to analyze the available experimental data. (C) 2000 Academic Press MH - Israel MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000089234800004 L2 - NONSTRANGE BARYONS; RADIATIVE DECAYS; QUARK-MODEL; SCATTERING; SPECTRA; ETA SO - Annals of Physics 2000 ;284(1):89-133 227 UI - 15813 AU - Bijker R AU - Iachello F AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, Sloane Lab, Ctr Theoret Phys, New Haven, CT 06520, USABijker, R, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Cluster states in nuclei as representations of a U(nu+1) group AB - We propose a description of cluster states in nuclei in terms of representations of unitary algebras U(nu + 1), where nu is the number of space degrees of freedom. Within this framework, a variety of situations including both vibrational and rotational spectra, soft and rigid configurations, identical and nonidentical constituents can be described. As an example, we show how the method can be used to study alpha clustering configurations in C-12 With point group symmetry D-3h MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000087575000084 L2 - MOLECULAR-SPECTRA SO - Physical Review C 2000 ;6106(6): 228 UI - 15517 AU - Binder T AU - Cruse A AU - Villar CAC AU - Marquardt W AD - Rhein Westfal TH Aachen, Lehrstuhl Prozesstech, D-52056 Aachen, GermanyCol San Pedro, Dept Ingn Elect, Zacatenco, MexicoBinder, T, Rhein Westfal TH Aachen, Lehrstuhl Prozesstech, Templegraben 55, D-52056 Aachen, Germany TI - Dynamic optimization using a wavelet based adaptive control vector parameterization strategy AB - In this work we present an adaptive parameterization strategy for the so-called sequential solution approach where the optimization problem is approximated by a nonlinear program (NLP) by parameterization of the control variables only. The proposed method is embedded into a solution methodology where a hierarchy of successively refined finite dimensional optimization problems are solved. Information on the solution of the coarser approximation is used to construct a fully adaptive, problem dependent parameterization. The adaptation is built on a multiscale setting involving wavelets. We demonstrate examplarily that the adaptive parameterization is more efficient and robust compared with a uniform parameterization of comparable accuracy. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000088546800151 L2 - dynamic optimization;large scale systems;adaptive mesh refinement;control vector parameterization;single shooting;wavelets SO - Computers & Chemical Engineering 2000 ;24(2-7):1201-1207 229 UI - 16056 AU - Binette L AU - Kurk JD AU - Villar-Martin M AU - Rottgering HJA AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoLeiden Observ, NL-2300 RA Leiden, NetherlandsUniv Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, EnglandBinette, L, Univ Nacl Autonoma Mexico, Inst Astron, Ap 70-264, Mexico City 04510, DF, Mexico TI - A vestige low metallicity gas shell surrounding the radio galaxy 0943-242 at z=2.92 AB - Observations are presented showing the doublet C IV lambda lambda 1548, 1551 absorption lines superimposed on the C rv emission in the radio galaxy 0943-242. Within the errors, the redshift of the absorption system that has a column density of N-CIV = 10(14.5+/-0.1) cm(-2) coincides with that of the deep Ly alpha absorption trough observed by Rottgering et al. (1995). The gas seen in absorption has a resolved spatial extent of at least 13 kpc (the size of the extended emission line region). We first model the absorption and emission gas as co-spatial components with the same metallicity and degree of excitation. Using the information provided by the emission and absorption line ratios of C IV and Ly alpha, we find that the observed quantities are incompatible with photoionization or collisional ionization of cloudlets with uniform properties. We therefore reject the possibility that the absorption and emission phases are co-spatial and favour the explanation that the absorption gas has low metallicity and is located further away from the host galaxy (than the emission line gas). The larger size considered for the outer halo makes plausible the proposed metallicity drop relative to the inner emission gas. In absence of confining pressure comparable to that of the emission gas, the outer halo of 0943-242 is considered to have a very low density allowing the metagalactic ionizing radiation to keep it higly ionized. In other radio galaxies where the jet has pressurized the outer halo, the same gas would be seen in emission (since the emissivity scales as n(H)(2)) and not in absorption as a result of the lower filling factor of the denser condensations. This would explain the anticorrelation found by van Ojik et al. (1997) between Ly alpha emission sizes (or radio jet sizes) and the observation (or not) of H I in absorption. The estimated low metallicity for the absorption gas in 0943-242 (Z similar to 0.01Z.) and its proposed location -outer halo outside the radio cocoon-suggest that its existence preceeds the observed AGN phase and is a vestige of the initial starburst at the onset of formation of the parent galaxy MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000086869300011 L2 - galaxies : individual : 0943-242;cosmology : early Universe;galaxies : active;galaxies : formation;galaxies : ISM;ELEMENT ABSORPTION SYSTEMS; HIGH-REDSHIFT; EVOLUTION; SPECTRUM; CLOUDS SO - Astronomy and Astrophysics 2000 ;356(1):23-32 230 UI - 14155 AU - Blanco-Davila F AU - Luce EA AD - Univ Neuvo Leon Hosp, Div Plast Surg, Monterrey, Neuvo Leon, MexicoCase Western Reserve Univ, Div Plast & Reconstruct Surg, Cleveland, OH 44106, USABlanco-Davila, F, Sexta Avenida 227,Col Cumbres, Monterrey, NL, Mexico TI - Current considerations for myelomeningocele repair AB - Important advances have been made in the reconstruction of myelomeningocele during the last few years. Techniques of closure that use diverse tissues available in the back range from very simple to very complex. Most of them have become essential to the plastic surgeon. To facilitate a more efficient interdisciplinary approach, recent advances in knowledge of the vascular anatomy of the skin and specific clinical surgical considerations concerning skin grafts, cutaneous flaps, and musculocutaneous flaps are reviewed. A topographical division of the lesion that will permit a methodologically adequate treatment plan for congenital defects in the back, specifically in the thoracic, thoracolumbar, and:lumbosacral regions is suggested MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Surgery U5 - J;Article AV - English IS - 1049-2275 UR - ISI:000167444800012 L2 - meningomyelocele;surgical flaps;blood supply;anatomy;spinal dysraphism;DORSI MYOCUTANEOUS FLAP; MUSCULOCUTANEOUS FLAP; MENINGOMYELOCELE DEFECTS; CHEST-WALL; CLOSURE; MUSCLE; SPINE SO - Journal of Craniofacial Surgery 2000 ;11(5):500-508 231 UI - 16394 AU - Blazquez J AU - Ruiz J AD - CIEMAT, Dept Nucl Fiss, E-28040 Madrid, SpainRuiz, J, Natl Inst Nucl Res, Mexico City, DF, Mexico TI - Neutron signal characterization of the power instability event at Laguna Verde BWR AB - On January 24, 1995, a power instability event occurred in Laguna Verde, a BWR/5 commercial plant. Recorded power oscillations were studied from the point of view of noise analysis. The 723-s long recorded signal comes from average power range monitors and was bad conditioned for noise analysis practice; it was neither stationary in mean, nor in variance. The signal first stage corresponds to the stable reactor; the third stage, to the unstable reactor. There was a second intermediate stage regarded as a transition one. The signal was preconditioned and divided in small blocks. Noise was analysed within each block in the amplitude, frequency and time domains. The analysis was aimed at on early recognition of instability by using the noise to discriminate between stable, transition and unstable state, regardless of the domain chosen for analysis. The experience obtained from studying real events, not depending on any physical model, are the ground for making safer operation procedures. (C) 2000 Published by Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0029-5493 UR - ISI:000085729300007 L2 - MODEL SO - Nuclear Engineering and Design 2000 ;196(3):327-336 232 UI - 15281 AU - Blumenthal UJ AU - Mara DD AU - Peasey A AU - Ruiz-Palacios G AU - Stott R AD - Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Med, London WC1E 7HT, EnglandUniv Leeds, Sch Civil Engn, Leeds, W Yorkshire, EnglandLondon Sch Hyg & Trop Med, Dept Infect & Trop Dis, Mexico City, DF, MexicoNatl Inst Nutr, Dept Infect Dis, Mexico City, DF, MexicoUniv Portsmouth, Dept Civil Engn, Portsmouth, Hants, EnglandBlumenthal, UJ, Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Med, Keppel St, London WC1E 7HT, England TI - Guidelines for the microbiological quality of treated wastewater used in agriculture: recommendations for revising WHO guidelines AB - Three different approaches for establishing guidelines for the microbiological quality of treated wastewater that is reused for agriculture are reviewed. These approaches have different objectives as their outcomes: the absence of faecal indicator organisms in the wastewater, the absence of a measurable excess of cases of enteric disease in the exposed population and a model-generated estimated risk below a defined acceptable risk. If the second approach (using empirical epidemiological studies supplemented by microbiological studies of the transmission of pathogens) is used in conjunction with the third approach (using a model-based quantitative risk assessment for selected pathogens) a powerful tool is produced that aids the development of regulations. This combined approach is more cost-effective than the first approach and adequately protects public health. The guideline limit for faecal coliform bacteria in unrestricted irrigation (less than or equal to 1000 faecal coliform bacteria/100 ml) is valid, but for restricted irrigation less than or equal to 10(5) faecal coliform bacteria/100 ml is recommended when adult farmworkers are exposed to spray irrigation. A limit of less than or equal to 10(3) faecal coliform bacteria/100 ml is recommended if flood irrigation is used or children are exposed. The guideline limit for nematode eggs for both types of irrigation is adequate except when conditions favour the survival of nematode eggs and where children are exposed; in these cases it should be reduced from less than or equal to 1 egg/l to less than or equal to 0.1 egg/l MH - United Kingdom MH - Mexico|Distrito Federal PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 36 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000089263900005 L2 - water microbiology, standards;Enterobacteriaceae;maximum allowable concentration;agriculture;World Health Organization;guidelines;VIRUS MONITORING DATA; WATER RECLAMATION; RISK ASSESSMENT; STABILIZATION PONDS; SPRAY IRRIGATION; REUSE; CRYPTOSPORIDIUM; GIARDIA; DISEASE; REMOVAL SO - Bulletin of the World Health Organization 2000 ;78(9):1104-1116 233 UI - 15285 AU - Bocardo JCE AU - Ramirez MA AU - Donizak J AU - Kolenda Z AD - IPN, Ctr Invest & Estudios Avanzados, Saltillo, Coahuila, MexicoAkad Gorniczo Hutnicza, Katedra Teorii & Inzynierii Proc Met, PL-30059 Krakow, PolandBocardo, JCE, IPN, Ctr Invest & Estudios Avanzados, Saltillo, Coahuila, Mexico TI - Computer-aided cooling curve analysis applied to Co-Cr-Mo system AB - Computer-aided cooling curve analysis has been applied to a cobalt-based alloy, (widely used in the production of surgical implants) resulting in better understanding of the solidification process, Transformation temperatures and latent heat of solidification have been evaluated. Further kinetics study of solidification has been made yielding information on the evolution of solid fraction during solidification process. Segregation patterns were obtained by means of metallographic and microanalysis techniques MH - Mexico|Coahuila MH - Poland PB - KRAKOW: POLISH ACAD SCIENCES COMMITTEE METALLURGY RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0860-7052 UR - ISI:000089306700006 L2 - EQUIAXED DENDRITIC GROWTH; SOLUTE DIFFUSION-MODEL; SOLIDIFICATION SO - Archives of Metallurgy 2000 ;45(2):185-196 234 UI - 16669 AU - Bogdanchikova N AU - Petranovskii V AU - Fuentes S AU - Paukshtis E AU - Sugi Y AU - Licea-Claverie A AD - UNAM, Ctr Ciencias Mat Condensada, San Ysidro, CA 92143, USACICESE, Ensenada 22800, Baja California, MexicoInst Catalysis, Novosibirsk 630090, RussiaGifu Univ, Gifu 50511, JapanInst Tecnol Tijuana, CGI, Tijuana 22000, BC, MexicoBogdanchikova, N, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Role of mordenite acid properties in silver cluster stabilization AB - In the present work, the role of SiO2/Al2O3 molar ratio in silver cluster stabilization inside mordenite pores was studied. It was found that SiO2/Al2O3 molar ratio regulates silver cluster stabilization by means of change of mordenite acid properties. The high concentration and high strength of Bronsted acid sites favor the stabilization of silver in the form of clusters inside the pores. In contrast, low concentration and low strength of Bronsted acid sites and high concentration of Lewis sites inside the channels can hinder stabilization of silver clusters. In this case, large particles on the external surface of zeolite are preferably formed. It was revealed that silver cluster introduction in its turn influences acid properties of mordenites, changing the concentration and structure of acid sites. As a result of silver incorporation, four types of Lewis acid sites presented in H-mordenites disappear and a new type of Lewis acid site appears. For the majority of samples, it is accompanied by enhancement of concentration of Lewis sites so that all Al becomes 'IR visible'. (C) 2000 Elsevier Science S.A. All rights reserved MH - USA MH - Japan MH - Mexico|Baja California MH - Russia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 14 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000084583200029 L2 - mordenite;acid properties;silver clusters SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2000 ;276(1-2):236-242 235 UI - 16396 AU - Bohigas J AU - Tapia M AU - Ruiz MT AU - Roth M AD - UNAM, Inst Astron, Ensenada 2800, Baja California, MexicoUniv Chile, Dept Astron, Santiago, ChileCarnegie Inst Washington, Las Campanas Observ, La Serena, ChileBohigas, J, UNAM, Inst Astron, Apdo Postal 877, Ensenada 2800, Baja California, Mexico TI - Possible detection of an old bipolar shell associated with eta Carinae AB - Continuum-subtracted dereddened images in the light of several atomic lines show the presence of an extended bipolar nebula surrounding eta Carinae with size similar to 100 x 45 arcsec(2) (1.3 x 0.5 pc(2)). This feature is best delineated in [O III] 5007. The geometrical disposition and mass of the shell suggest that it was formed by mass ejections from eta Carinae, The dynamic age of the nebula is similar to 13 000/V-7 yr, where V-7 is the mean expansion velocity in 100 km s(-1), and its mass is between 5 and 10 M.. The nebula is photoionized and composed of unprocessed material. The major axes of the nebula and of the Homunculus are nearly perpendicular. We also report the discovery of elongated emission knots prominent in [N II] located 64 to 100 arcsec away from eta Carinae, which implies that they were ejected either centuries ago or at a more recent date bht with extremely large velocities MH - Chile MH - Mexico|Baja California PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000085823700009 L2 - stars : individual : eta Carinae;stars : variables : other;HII regions;ISM : individual : NGC 3372;LUMINOUS BLUE VARIABLES; AG-CARINAE; X-RAYS; NEBULAE; MORPHOLOGY; LBV SO - Monthly Notices of the Royal Astronomical Society 2000 ;312(2):295-300 236 UI - 16608 AU - Bohm A AU - Kaldass H AU - Wickramasekara S AU - Kielanowski P AD - Univ Texas, Dept Phys, Austin, TX 78712, USAIPN, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoBohm, A, Univ Texas, Dept Phys, Austin, TX 78712, USA TI - Semigroup representations of the Poincare group and relativistic Gamow vectors AB - Gamow vectors are generalized eigenvectors (kets) of self-adjoint Hamiltonians with complex eigenvalues (E-R -/+ i Gamma/2) describing quasistable states. In the relativistic domain this leads to Poincare semigroup representations which are describing quasistable states. In the relativistic domain this leads to Poincare a characterized by spin j and by complex invariant mass square s = s(R) = ( M-R - 1/2 Gamma(R))(2). Relativistic Gamow kets have all the properties required to describe relativistic resonances and quasistable particles with resonance mass M-R and lifetime h/Gamma(R). (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000084914200001 L2 - Poincare semigroup;relativistic resonances;decaying states;IRREVERSIBILITY SO - Physics Letters A 2000 ;264(6):425-433 237 UI - 16577 AU - Bombal F AU - Fernandez M AD - Univ Complutense Madrid, Dept Anal Matemat, Madrid, SpainCIMAT, Guanajuato, MexicoBombal, F, Univ Complutense Madrid, Dept Anal Matemat, Madrid, Spain TI - Polynomial properties and symmetric tensor product of Banach spaces AB - We study some classes of distinguished subsets of a Banach space in terms of polynomials and their relationship. This allows us to develop a systematic approach to study polynomial properties on a Banach space. We apply this approach to obtain several known and new results on the symmetric tensor product of a Banach space in a unified way MH - Mexico|Guanajuato MH - Spain PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0003-889X UR - ISI:000085111400007 SO - Archiv der Mathematik 2000 ;74(1):40-49 238 UI - 14871 AU - Bombardier C AU - Laine L AU - Reicin A AU - Shapiro D AU - Burgos-Vargas R AU - Davis B AU - Day R AU - Ferraz MB AU - Hawkey CJ AU - Hochberg MC AU - Kvien TK AU - Schnitzer TJ AU - Weaver A AD - Mt Sinai Hosp, Inst Work & Hlth, Toronto, ON M5G 1X5, CanadaUniv Hlth Network, Toronto, ON, CanadaUniv So Calif, Sch Med, Dept Med, Gastrointestinal Div, Los Angeles, CA 90033, USAUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Div Res, Mexico City 04510, DF, MexicoMerck & Co Inc, Rahway, NJ 07065, USAHosp Gen Mexico, Mexico City, DF, MexicoUniv Texas, Sch Publ Hlth, Houston, TX, USAUniv New S Wales, Dept Clin Pharmacol, Sydney, NSW, AustraliaSt Vincents Hosp, Sydney, NSW 2010, AustraliaUniv Fed Sao Paulo, Escola Paulista Med, Dept Med, Div Rheumatol, Sao Paulo, BrazilUniv Nottingham Hosp, Sch Med & Surg Sci, Div Gastroenterol, Nottingham NG7 2UH, EnglandUniv Maryland, Div Clin Immunol & Rheumatol, Baltimore, MD 21201, USAOslo City Dept Rheumatol, Oslo, NorwayDiakonhjemmet Hosp, Oslo, NorwayNorthwestern Univ, Sch Med, Off Clin Res & Training, Chicago, IL, USABombardier, C, Inst Work & Hlth, 250 Bloor St E,Suite 702, Toronto, ON M4W 1E6, Canada TI - Comparison of upper gastrointestinal toxicity of rofecoxib and naproxen in patients with rheumatoid arthritis AB - Background: Each year, clinical upper gastrointestinal events occur in 2 to 4 percent of patients who are taking nonselective nonsteroidal antiinflammatory drugs (NSAIDs). We assessed whether rofecoxib, a selective inhibitor of cyclooxygenase-2, would be associated with a lower incidence of clinically important upper gastrointestinal events than is the nonselective NSAID naproxen among patients with rheumatoid arthritis. Methods: We randomly assigned 8076 patients who were at least 50 years of age (or at least 40 years of age and receiving long-term glucocorticoid therapy) and who had rheumatoid arthritis to receive either 50 mg of rofecoxib daily or 500 mg of naproxen twice daily. The primary end point was confirmed clinical upper gastrointestinal events (gastroduodenal perforation or obstruction, upper gastrointestinal bleeding, and symptomatic gastroduodenal ulcers). Results: Rofecoxib and naproxen had similar efficacy against rheumatoid arthritis. During a median follow-up of 9.0 months, 2.1 confirmed gastrointestinal events per 100 patient-years occurred with rofecoxib, as compared with 4.5 per 100 patient-years with naproxen (relative risk, 0.5; 95 percent confidence interval, 0.3 to 0.6; P<0.001). The respective rates of complicated confirmed events (perforation, obstruction, and severe upper gastrointestinal bleeding) were 0.6 per 100 patient-years and 1.4 per 100 patient-years (relative risk, 0.4; 95 percent confidence interval, 0.2 to 0.8; P=0.005). The incidence of myocardial infarction was lower among patients in the naproxen group than among those in the rofecoxib group (0.1 percent vs. 0.4 percent; relative risk, 0.2; 95 percent confidence interval, 0.1 to 0.7); the overall mortality rate and the rate of death from cardiovascular causes were similar in the two groups. Conclusions: In patients with rheumatoid arthritis, treatment with rofecoxib, a selective inhibitor of cyclooxygenase-2, is associated with significantly fewer clinically important upper gastrointestinal events than treatment with naproxen, a nonselective inhibitor. (N Engl J Med 2000;343:1520-8.) (C) 2000, Massachusetts Medical Society MH - Australia MH - Brazil MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal MH - Norway MH - USA PB - WALTHAM: MASSACHUSETTS MEDICAL SOC RP - NOT IN FILE U3 - TC 1621 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0028-4793 UR - ISI:000165410900003 L2 - NONSTEROIDAL ANTIINFLAMMATORY DRUGS; DOUBLE-BLIND; CONTROLLED TRIAL; CYCLOOXYGENASE; OSTEOARTHRITIS; COMPLICATIONS; INHIBITION; CELECOXIB SO - New England Journal of Medicine 2000 ;343(21):1520-1528 239 UI - 16654 AU - Bonvicini V AU - Busso L AU - Giubellino P AU - Gregorio A AU - Idzik M AU - Kolojvari A AU - Montano LM AU - Nouais D AU - Petta C AU - Rashevsky A AU - Randazzo N AU - Reito S AU - Tosello F AU - Vacchi A AU - Vinogradov L AU - Zampa N AD - Ist Nazl Fis Nucl, Sez Trieste, Trieste, ItalyIst Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyIst Nazl Fis Nucl, Sez Catania, I-95129 Catania, ItalyAcad Min & Met, Fac Phys & Nucl Tech, Krakow, PolandSt Petersburg State Univ, Cyclotron Lab, St Petersburg, RussiaCINVESTAV, Mexico City 14000, DF, MexicoBonvicini, V, Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy TI - Laboratory and test beam results from a large-area silicon drift detector AB - A very large-area (6.75 x 8 cm(2)) silicon drift detector with integrated high-voltage divider has been designed, produced and fully characterised in the laboratory by means of ad hoc designed MOS injection electrodes. The detector is of the "butterfly" type, the sensitive area being subdivided into two regions with a maximum drift length of 3.3 cm. The device was also tested in a pion beam (at the CERN PS) tagged by means of a microstrip detector telescope. Bipolar VLSI front-end cells featuring a noise of 250 e(-) rms at 0 pF with a slope of 40 e(-)/pF have been used to read out the signals. The detector showed an excellent stability and featured the expected characteristics. Some preliminary results will be presented. (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000084654100034 SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2000 ;439(2-3):476-482 240 UI - 14211 AU - Borboa L AU - de la Torre C AD - CSIC, Ctr Invest Biol, E-28006 Madrid, SpainUniv Autonoma Sinaloa, Escuela Med, Culiacan, MexicoBorboa, L, CSIC, Ctr Invest Biol, Velazquez 144, E-28006 Madrid, Spain TI - Adaptation to Cd(II) and Zn(II), and the caffeine-potentiated override of the G(2) block induced by the checkpoint activated by DNA damage AB - Moderate and low concentrations of Zn(II) and Cd(II) a ere defined as those which depressed the rate of root elongation in Allium cepa L. to about 40 and 70% respectively of the control (17.3 +/- 4.9 mm/day) at 25 degreesC. At moderate concentrations, cells were detoxified from Cd(II), but not from Zn(II), by inducing the heavy metal chelators phytochelatins. Thus, root elongation further decreased (from 41 to 19% of the control) at moderate (0.05 mM) Cd(II) concentration upon addition of 0.25 mM L-buthionine-[S,R]-sulfoximine (BSO), a specific inhibitor of phytochelatin synthesis. On the other hand, cells were also detoxified from Zn(II) by an alternative mechanism, as the 42% inhibition displayed at 0.5 mM Zn(II) concentration was partially reversed (up to 79%) in the presence of BSO. Zn(II) activated the checkpoint pathway induced by DNA damage, as a transient G(2) block was produced this block was partially cancelled by caffeine, so that chromosomal bridges (but no breaks) were observed in ana-telophase. On the other hand, Cd(II) did not activate the DNA damage checkpoint, as cells entered into anaphase with chromosomal breaks and bridges without any delay Cd(II) may preclude the recognition of DNA damage by altering protein-DNA interactions, since 30% of the metaphases displayed clumped chromosomes. A minimum threshold was required to induce the adaptive responses described here, as BSO did not modify the reduction in root elongation rate recorded at low concentrations of both heavy metals MH - Mexico|Sinaloa MH - Spain PB - SIENA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 1126-3504 UR - ISI:000167095900001 L2 - heavy metals;stress adaptation;DNA damage-dependent checkpoint;caffeine;Allium cepa L.;CELL-CYCLE CHECKPOINTS; METALLOTHIONEIN GENE; CADMIUM; METAL; GENOTOXICITY; EXPRESSION; GROWTH; PLANTS; ZINC; IONS SO - Plant Biosystems 2000 ;134(1):3-9 241 UI - 15437 AU - Borges-Argaez R AU - Pena-Rodriguez LM AU - Waterman PG AD - So Cross Univ, Ctr Phytochem, Lismore, NSW 2480, AustraliaCtr Invest Cient Yucatan, Grp Quim Organ, Unidad Biotecnol, Merida 97310, Yucatan, MexicoWaterman, PG, So Cross Univ, Ctr Phytochem, POB 157, Lismore, NSW 2480, Australia TI - Flavonoids from the stem bark of Lonchocarpus xuul AB - The stem bark of Lonchocarpus xuul (Leguminosae) has yielded four flavonoids which have been identified by spectroscopic methods as the novel 4 beta,5-dimethoxy-6 ",6 "-dimethyl-2H-pyrano-(2 ",3 ":7,6)-flavan (xuulanin), 3 beta,4 beta,5-trimethoxy-6 ",6 "-dimethyl-2H-pyrano-(2 ",3 ":7,6)-flavan (3 beta-methoxyxuulanin), 4 beta-ethoxy-5-methoxy-6 ",6 "-dimethyl-2H-pyrano-(2 ",3 ":7,6)-flavan (4 beta-demethylxuulanin-4 beta-ethyl other), and the known 5,7-dihydroxy-6,8-di(3-methylbut-2-enyl)flavanone (spiniflavanone-B). The ethyl derivative is considered likely to be an artefact. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Australia MH - Mexico|Yucatan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000088715000010 L2 - Lonchocarpus xuul;Leguminosae-Papilionoideae;flavonoids;flavan-4-ol;flavan-3,4-diol;flavanone SO - Phytochemistry 2000 ;54(6):611-614 242 UI - 16218 AU - Borges G AU - Walters EE AU - Kessler RC AD - Inst Mexicano Psiquiatria, Div Invest Epidemiol & Sociales, Mexico City 14370, DF, MexicoHarvard Univ, Sch Med, Dept Hlth Care Policy, Boston, MA 02115, USABorges, G, Inst Mexicano Psiquiatria, Div Invest Epidemiol & Sociales, Calzada Mexico,Xochimilco 101,Col San Lorenzo, Mexico City 14370, DF, Mexico TI - Associations of substance use, abuse, and dependence with subsequent suicidal behavior AB - General population survey data are used to disaggregate the associations of substance use disorders with suicide attempts in order to evaluate a number of hypotheses about the processes leading to these associations. Data are from the US National Comorbidity Survey (1990-1992). Discrete-time survival analysis is used to study the effects of retrospectively reported temporally prior substance use, abuse, and dependence in predicting first onset of suicidal behavior. Alcohol and drug use predict subsequent suicide attempts after controlling for sociodemographics and comorbid mental disorders. Previous use is not a significant predictor among current nonusers. Abuse and dependence are significant predictors among users for three of the 10 substances considered (alcohol, inhalants, and heroin). The number of substances used is more important than the types of substances used in predicting suicidal behavior. Disaggregation shows that the effects of use are largely on suicidal ideation and nonplanned attempts among ideators. In comparison, the effects of use on suicide plans and planned attempts among ideators are not significant. Clinicians need to be aware that current substance use, even in the absence of abuse or dependence, is a significant risk factor for unplanned suicide attempts among ideators MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 68 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000086443700007 L2 - alcohol drinking;comorbidity;mental health;substance-related disorders;suicide;suicide, attempted;NATIONAL-COMORBIDITY-SURVEY; INTERNATIONAL DIAGNOSTIC INTERVIEW; RISK-FACTORS; PSYCHIATRIC-DISORDER; GENERAL-POPULATION; SURVIVAL ANALYSIS; MENTAL-DISORDERS; MARITAL-STATUS; IDEATION; ADOLESCENTS SO - American Journal of Epidemiology 2000 ;151(8):781-789 243 UI - 14863 AU - Borgonovi F AU - Izrailev FM AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAIst Nazl Fis Mat, Unita Milano, I-22100 Milan, ItalyIst Nazl Fis Nucl, Unita Pavia, I-27100 Pavia, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoBorgonovi, F, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Classical statistical mechanics of a few-body interacting spin model AB - We study the emergence of Boltzmann's law for the ''single-particle energy distribution'' in a closed system of interacting classical spins. It is shown that for a large number of particles Boltzmann's law may occur, even if the interaction is very strong. Specific attention is paid to classical analogs of the average shape of quantum eigenstates and ''local density of states," which are very important in quantum chaology. Analytical predictions are then compared with numerical data MH - Italy MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000165341700081 L2 - FINITE FERMI SYSTEMS; QUANTUM; CHAOS; OSCILLATORS; ERGODICITY; DYNAMICS; NUMBERS; STATES SO - Physical Review e 2000 ;62(5):6475-6486 244 UI - 14694 AU - Borissova J AU - Georgiev L AU - Rosado M AU - Kurtev R AU - Bullejos A AU - Valdez-Gutierrez M AD - Bulgarian Acad Sci, Inst Astron, BU-1784 Sofia, BulgariaIsaac Newton Inst, Chile Bulgarian Branch, BU-1784 Sofia, BulgariaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Sofia, Dept Astron, Sofia 1164, BulgariaBranch Sofia Univ, Isaac Newton Inst, Sofia 1164, BulgariaInst Nacl Astrofis Opt & Elect, Mexico City, DF, MexicoBorissova, J, Bulgarian Acad Sci, Inst Astron, 72 Tsarigradsko Chaussee, BU-1784 Sofia, Bulgaria TI - Infrared photometry of the Local Group dwarf irregular galaxy IC 10 AB - We present near infrared JHK photometry for the central area of the irregular dwarf galaxy IC 10. Red stellar population of IC 10 contains young (10-50 Myr) massive red supergiants. Most of AGE stars are younger than 1 Gyr and have masses up to 12 M-.. Comparing the red supergiants of IC 10 and IC 1613 we have determined the reddening of E(B - V) = 1.05 +/- 0.10 and the dereddened distance modulus (m - M)(0) = 23.86 +/- 0.12 mag of Population I stars in IC 10. Detection of six Br gamma emission structures clearly outline two star forming regions in the central area of IC 10. There is no H-2 emission down to 4.65 10(-16) erg(-1)cm(-2) arcsec(-2) indicating that the dominant excitation mechanism of the molecular gas is from UV radiation from hot young stars. From the comparison of Br gamma and H alpha fluxes, we derive average extinction toward the star forming regions E(B - V)H alpha = 1.8 +/- 0 2 The summarized SFR derived from six H alpha and Br gamma emission structures in our field of view is 0.6 M-. year(-1) MH - Bulgaria MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000165873600016 L2 - galaxies : Local Group;galaxies : individual : IC 10;IC 1613;galaxies : stellar content;STELLAR CONTENT; STAR-FORMATION; STANDARD STARS; IC-10; KINEMATICS; DISTANCES; MODELS; COLORS SO - Astronomy and Astrophysics 2000 ;363(1):130-140 245 UI - 16535 AU - Borowiec AZ AU - Vazquez-Coutino GA AD - Univ Wroclaw, Inst Theoret Phys, PL-50204 Wroclaw, PolandUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoBorowiec, AZ, Univ Wroclaw, Inst Theoret Phys, Pl Maxa Borna 9, PL-50204 Wroclaw, Poland TI - Some topics in coalgebra calculus AB - We study a coderivation from a cobimodule into a coalgebra. Vector cofields are defined by the action of a codual bicomodule on a coalgebra. This action is induced by a codifferential. A construction of a codual object in the category of bicomodules over a given coalgebra has been proposed. Various notions of duality have been analysed in this context MH - Mexico|Distrito Federal MH - Poland PB - PRAGUE: CZECHOSLOVAK JNL OF PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000085186700003 SO - Czechoslovak Journal of Physics 2000 ;50(1):23-28 246 UI - 15411 AU - Bottiglieri C AU - Ferrara L AU - Corona M AU - Gurrola GB AU - Batista C AU - Wanke E AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoCNR, Ctr Int Servizi Spettrometia Massa, IABBAM, I-80147 Naples, ItalyUniv Milan, Biocca, Dept Biotechnol & Biosci, I-20126 Milan, ItalyPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Avenida Univ 2001,POB 510-3, Cuernavaca 62210, Morelos, Mexico TI - Disulfide bridges of Ergtoxin, a member of a new sub-family of peptide blockers of the ether-a-go-go-related K+ channel MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Letter AV - English IS - 0014-5793 UR - ISI:000088963900017 L2 - SCORPION SO - Febs Letters 2000 ;479(3):156-157 247 UI - 16520 AU - Boue M AU - Dupuis P AU - Ellis RS AD - Inst Tecnol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, MexicoBrown Univ, Div Appl Math, Providence, RI 02912, USAUniv Massachusetts, Dept Math & Stat, Amherst, MA 01003, USABoue, M, Inst Tecnol Autonomo Mexico, Dept Matemat, Rio Hondo 1, Mexico City 01000, DF, Mexico TI - Large deviations for small noise diffusions with discontinuous statistics AB - This paper proves the large deviation principle for a class of non-degenerate small noise diffusions with discontinuous drift and with state-dependent diffusion matrix. The proof is based on a variational representation for functionals of strong solutions of stochastic differential equations and on weak convergence methods MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0178-8051 UR - ISI:000085268100006 L2 - large deviations;small noise diffusions;discontinuous statistics;SYSTEMS SO - Probability Theory and Related Fields 2000 ;116(1):125-149 248 UI - 14810 AU - Boulet G AU - Chehbouni A AU - Braud I AU - Vauclin M AU - Haverkamp R AU - Zammit C AD - LTHE CNRS UMR 5564 UJF INPG IRD, F-38041 Grenoble 9, FranceIRD, IMADES, Hermosillo 83190, Sonora, MexicoBoulet, G, CESBIO, 18 Av E Belin,Bpi 2801, F-31401 Toulouse 4, France TI - A simple water and energy balance model designed for regionalization and remote sensing data utilization AB - A simple soil-vegetation-atmosphere transfer (SVAT) model designed for scaling applications and remote sensing utilization will be presented. The study is part of the Semi-Arid Land Surface Atmosphere (SALSA) program. The model is built with a single-bucket and single-source representation with a bulk surface of mixed vegetation and soil cover and a single soil reservoir. Classical atmospheric forcing is imposed at a reference level. It uses the concept of infiltration and evaporation capacities to describe water infiltration or exfiltration from a bucket of depth d(r) corresponding to the average infiltration and evaporation depth. The atmospheric forcing is divided into storm and interstorm periods, and both evaporation and infiltration phenomena are described with the well-known three stages representation: one at potential (energy- or rainfall-limited) rate, one at a rate set by the soil water content and one at a zero rate if the water content reaches one of its range limits, namely saturation or residual values. The analytical simplicity of the model is suitable for the investigation of the spatial variability of the mass and energy water balance, and its one-layer representation allows for the direct use of remote sensing data. The model is satisfactorily evaluated using data acquired in the framework of SALSA and a mechanistic complex SVAT model, Simple Soil-Plant-Atmosphere Transfer (SiSPAT) model. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800009 L2 - SVAT modeling;remote sensing;infiltration and exfiltration capacities;SURFACE-TEMPERATURE; SOIL; VEGETATION; CLIMATE; EVAPOTRANSPIRATION; APPROXIMATION; CALIBRATION; CONDUCTANCE; EVAPORATION; DYNAMICS SO - Agricultural and Forest Meteorology 2000 ;105(1-3):117-132 249 UI - 14459 AU - Bourges-Waldegg P AU - Scrivener SAR AD - Res & Adv Studies Ctr, Mexico City, DF, MexicoCoventry Univ, Coventry, W Midlands, EnglandBourges-Waldegg, P, Ctr Invest & Estudios Avanzados, Rincon Colonial Calacoaya, Atizapan 53996, Mexico TI - Applying and testing an approach to design for culturally diverse user groups AB - This paper intends to illustrate how user interface designers can apply the Meaning in Mediated Action (MIMA) approach (P. Bourges-Waldegg. A.R. Scrivener, Meaning; the central issue is crosscultural HCI design, Interacting with Computers, 9 (3) (1998) 287-310, special issue on "Shared Values and Shared Interfaces") to design for culturally diverse user groups. After outlining its theoretical foundation, we describe how the MIMA stages-observation, evaluation, analysis and design-were carried out to redesign a WWW system. Finally, we assess the efficacy of this approach by comparing the results of the evaluation of the original and the redesigned interfaces. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Cybernetics;Ergonomics U5 - J;Article AV - English IS - 0953-5438 UR - ISI:000166449500001 L2 - culture;interface design;representation;meaning;context SO - Interacting with Computers 2000 ;13(2):111-126 250 UI - 16201 AU - Bourgois J AU - Guivel C AU - Lagabrielle Y AU - Calmus T AU - Boulegue J AU - Daux V AD - Univ Paris 06, CNRS, Lab Geodynam Tecton & Environm, F-75252 Paris 05, FranceUniv Paris 06, Lab Geochim & Met Gen, F-75252 Paris, FranceUniv Autonoma Mexico, Inst Geol, Hermosillo, Sonora, MexicoUniv Paris 06, Lab Geol Sedimentaire, F-75252 Paris 05, FranceUniv Nantes, Lab Planetol & Geodynam, F-44322 Nantes 3, FranceInst Rech Dev, Noumea, New CaledoniaBourgois, J, Univ Paris 06, CNRS, Lab Geodynam Tecton & Environm, Tour 16-26,4eme Etage,Boite 119,4 Pl Jussieu, F-75252 Paris 05, France TI - Glacial-interglacial trench supply variation, spreading-ridge subduction, and feedback controls on the Andean margin development at the Chile triple junction area (45-48 degrees S) AB - During the Chile triple junction (CTJ) cruise (March-April 1997), EM12 bathymetry and seismic reflection data were collected in the vicinity of the Chile triple junction (45-48 degrees S), where an active spreading ridge is being subducted beneath the Andean continental margin. Results show a continental margin development shaped by tectonic processes spanning a spectrum from subduction-erosion to subduction-accretion. The Andean continental margin and the Chile trench exhibit a strong segmentation which reflects the slab segmentation and the Chile triple junction migration. Three segments were identified along the Andean continental margin: the presubduction, the synsubduction, and the postsubduction segments, from north to south. Both climate-induced variations of the sediment supply to the trench and the tectonic reorganization at the Nazca-Antarctica plate boundary involving postsubduction ridge jump are the two main factors that control the tectonic regime of this continental margin. Along the survey area we infer the succession of two different periods during the last glacial-interglacial cycle: a glacial period with ice-rafted detrital discharges restricted to the shoreline area and low river output and a warmer period during which the Andean ice cap retreat allowed the Andes to be drained off. During these warm periods, rapid increase in trench deposition caused the margin to switch from subduction-erosion or nonaccretion to subduction-accretion: (1) along the presubduction segment after the last deglaciation and (2) along the postsubduction segment after the interglacial episode at 130-117 ka. Conversely, a nonaccretion or subduction-erosion mode characterized the presubduction and postsubduction segments during glacial maximums. The major effects of subduction of the buoyant Chile ridge include a shallow trench which diverts trench sediment supply and tectonic instabilities at the Nazca-Antarctica plate boundary. We suggest that a postsubduction westward jump of the Chile ridge occurred during the past 780 kyr. It produced slab fragmentation and individualization of an ephemeral microplate north of the 'Taitao fracture zone: the Chonos microplate. In 780 kyr, two episodes of subduction-accretion separated by an episode of subduction-erosion occurred in relation with the Chonos microplate individualization and subduction. The current northward migration of the triple junction along the Chonos microplate-South America plate boundary introduces a sharp change in the tectonic mode from subduction-erosion to the north to subduction-accretion to the south. The data collected along the Taitao ridge have revealed the complex three-dimensional structure of an accretionary wedge which includes a midslope thrust sheet exhibiting the characteristics of an ophiolite: the Taitao Ridge ophiolite. No connection exists between the Taitao Ridge ophiolite and the Bahia Barrientos ophiolite cropping out onland in the Taitao peninsula MH - France MH - Mexico|Sonora MH - New Caledonia PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000086437500033 L2 - SOUTHERN CHILE; TECTONIC EROSION; CONVERGENT MARGINS; PLATE; COLLISION; AMERICA; ZONE; MANIFESTATIONS; CONSEQUENCES; GEOCHEMISTRY SO - Journal of Geophysical Research-Solid Earth 2000 ;105(B4):8355-8386 251 UI - 14606 AU - Bousquet J AU - D'Urzo A AU - Hebert J AU - Barraza CH AU - Boulet LP AU - Suarez-Chacon R AU - Harnest U AU - Lundback B AU - Morales GM AU - Nieminen MM AU - Nolop KB AU - Visser S AU - Lutsky BN AD - Hop Arnaud de Villeneuve, Serv Malad Resp, F-34059 Montpellier, FrancePrimary Care Asthma Clin, Toronto, ON, CanadaHosp Clin Parque, Chihuahua, MexicoHop Laval, Quebec City, PQ, CanadaPoliclin Metropolitana, Caracas, VenezuelaBodens Sjukhus, Dept Med, Boden, SwedenHosp Gen Enfermedad Comun, IGSS, Guatemala, CA, USATampere Univ Hosp, Tampere, FinlandSchering Plough Res Inst, Kenilworth, NJ, USAHF Verwoerd Hosp, Dept Internal Med, Pretoria, South AfricaBousquet, J, Hop Arnaud de Villeneuve, Serv Malad Resp, 555 Route Ganges, F-34059 Montpellier, France TI - Comparison of the efficacy and safety of mometasone furoate dry powder inhaler to budesonide Turbuhaler (R) AB - Mometasone furoate (MF) administered by dry powder inhaler (DPI) was composed with budesonide (BUD) Turbuhaler(R) in the treatment of moderate persistent asthma. The patients were randomized to one of four treatment groups: MF DPI (100, 200, 400 mug b.i.d) or BUD Turbuhaler(R). 400 mug b.i.d in a 12-week, active-controlled, evaluator-blind, multicentre international trial. The primary efficacy variable was the mean change from baseline to endpoint Oast treatment visit) in forced expiratory volume in one second (FEV1), Changes in FEV1 showed a statistically significant superiority (p<0.05) of MF DPI 200 and 400 g b.i.d compared with the BUD Turbuhaler(R) 400 mug b.i.d treatment. Significant superiority (p<0.05) was also seen in scores for several secondary efficacy variables when MF DPI was compared,vith BUD Turbuhaler(R) treatment. MF DPI 200 g b.i.d was comparable to MF DPI 400 mug b.i.d in therapeutic benefit. The incidence of oral candidiasis was no more than 3% in any group. All treatments were well tolerated. A total daily dose of 400 mug of mometasone furoate administered by dry powder inhaler provides a well-tolerated treatment for patients with moderate persistent asthma and results in a significantly greater improvement, when compared to a daily dose of 800 mug BUD Turbuhaler(R) in the parameters measured in this study MH - Canada MH - Finland MH - France MH - Mexico|Chihuahua MH - South Africa MH - Sweden MH - USA MH - Venezuela PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 19 U4 - Respiratory System U5 - J;Article AV - English IS - 0903-1936 UR - ISI:000166193700005 L2 - asthma;budesonide;corticosteroid;glucocorticoid;Mometasone Furoate;Turbuhaler (R);AQUEOUS NASAL SPRAY; SEASONAL ALLERGIC RHINITIS; GLUCOCORTICOIDS; ASTHMA; CORTICOSTEROIDS SO - European Respiratory Journal 2000 ;16(5):808-816 252 UI - 15440 AU - Boyd TJM AU - Ondarza-Rovira R AD - Univ Essex, Dept Phys, Colchester CO4 3SQ, Essex, EnglandInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoBoyd, TJM, Univ Essex, Dept Phys, Wivenhoe Pk, Colchester CO4 3SQ, Essex, England TI - Plasma line emission from short pulse laser interactions with dense plasmas AB - Plasma line emission is observed in simulations of dense plasma irradiated by moderately intense light pulses of duration some tens of femtoseconds, and its scaling with density and with laser intensity is studied. Plasma emission is recorded both during the pulse where it is observed against the background spectrum of harmonics of the laser frequency as well as postpulse. Harmonics of the plasma line up to the fifth have been observed. An unexpected feature present in most of the reflected light spectra appears on the blue side of the plasma line with a central frequency omega similar to 1.5 omega(p) MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000088745100023 L2 - FEMTOSECOND SO - Physical Review Letters 2000 ;85(7):1440-1443 253 UI - 16262 AU - Brake WG AU - Flores G AU - Francis D AU - Meaney MJ AU - Srivastava LK AU - Gratton A AD - McGill Univ, Douglas Hosp Res Ctr, Dept Psychiat, Montreal, PQ, CanadaUniv Autonoma Puebla, Inst Fisiol, Puebla 72570, MexicoGratton, A, McGill Univ, Douglas Hosp Res Ctr, Dept Psychiat, 6875 LaSalle Blvd, Montreal, PQ, Canada TI - Enhanced nucleus accumbens dopamine and plasma corticosterone stress responses in adult rats with neonatal excitotoxic lesions to the medial prefrontal cortex AB - The medial prefrontal cortex modulates the nucleus accumbens dopamine response to stress and has been implicated in feedback regulation of hypothalamic-pituitary-adrenal axis activation by stress. Here we report on the effects of bilateral neonatal (postnatal day 7) ibotenate-induced lesions to the medial prefrontal cortex on nucleus accumbens dopamine and neuroendocrine function in adult rats. Voltammetry was used to monitor the dopamine response to each of five, once-daily exposures to tail-pinch stress whereas alterations in neuroendocrine function were determined from the plasma corticosterone response to a single 20-min episode of restraint stress. Potential lesion-induced deficits in sensory-motor gating were assessed by measuring prepulse inhibition of the acoustic startle response before and after repeated stress. Our data show that each daily stress episode elicited larger and longer-lasting dopamine increases in prefrontal cortex-lesioned animals than in sham-lesioned controls. Furthermore, greater stress-induced elevations in plasma corticosterone were seen in lesioned animals than in their sham-lesioned counterparts. However, while repeated stress potentiated startle responses in animals of both groups, there was no effect of lesion on the amplitude or on prepulse inhibition of the startle response. Together, these findings indicate that neonatal prefrontal cortex damage can lead to changes in mesolimbic dopamine and neuroendocrine function during adulthood. They also add to a growing body of experimental and clinical evidence implicating abnormal prefrontal cortex neuronal development in the pathophysiology of schizophrenia and other disorders linked to central dopamine dysfunction. (C) 2000 IBRO. Published by Elsevier Science Ltd MH - Canada MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 63 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000086204000005 L2 - voltammetry;glucocorticoids;HPA axis;ibotenic acid;prepulse inhibition;schizophrenia;VENTRAL TEGMENTAL AREA; CARBON-FIBER MICROELECTRODES; SPATIAL DELAYED ALTERNATION; FREELY-BEHAVING RATS; FRONTAL-CORTEX; LOCOMOTOR RESPONSE; CORTICAL DOPAMINE; ANIMAL-MODEL; TOPOGRAPHICAL ORGANIZATION; 6-HYDROXYDOPAMINE LESIONS SO - Neuroscience 2000 ;96(4):687-695 254 UI - 15055 AU - Brambila-Paz L AU - Mercat V AU - Newstead PE AU - Ongay F AD - CIMAT, Guanajuato 36240, MexicoUniv Paris 07, Math Inst, F-75251 Paris 05, FranceUniv Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, EnglandBrambila-Paz, L, CIMAT, Apdo Postal 402, Guanajuato 36240, Mexico TI - Nonemptiness of Brill-Noether loci AB - Let X be a non-singular algebraic curve of genus g. We prove that the Brill-Noether locus W-n,d(sk-1) is non-empty if d = nd' + d" with 0 < d" < 2n, 1 less than or equal to s less than or equal to g, d' greater than or equal to (s - 1)(s + g)/s, n less than or equal to d" + (n - k)g, (d", k) not equal (n, n). These results hold for an arbitrary curve of genus greater than or equal to 2, and allow us to construct a region in the associated "Brill-Noether (mu, lambda)-map" of points for which the Brill-Noether loci are non-empty. Even for the generic case, the region so constructed extends beyond that defined by the so-called "Teixidor parallelograms". For hyperelliptic curves, the same methods give more extensive and precise results MH - United Kingdom MH - France MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0129-167X UR - ISI:000089894200001 L2 - STABLE VECTOR-BUNDLES; SMALL SLOPES SO - International Journal of Mathematics 2000 ;11(6):737-760 255 UI - 14019 AU - Brambilla E AU - Munoz-Sanchez JL AU - Waalkes MP AU - Albores A AD - NIEHS, Inorgan Carcinogenesis Sect, Comparat Carcinogenesis Lab, NCI, Res Triangle Pk, NC 27706, USABenenerita Univ, Fac Ciencias Quim, Autonoma Puebla, MexicoInst Politecn Nacl, Escuela Nacl Ciencias Biol, Mexico City, DF, MexicoIPN, Ctr Invest & Estud Avanzados, Dept Farmacol & Toxicol, Secc Toxicol Ambiental, Mexico City 07738, DF, MexicoBrambilla, E, NIEHS, Inorgan Carcinogenesis Sect, Comparat Carcinogenesis Lab, NCI, 111 Alexander Dr,Bldg 101,SC MD FO-09,RM F095, Res Triangle Pk, NC 27706 USA TI - Effect of surgically induced cholestasis on the levels of hepatic zinc and metallothionein in rat liver AB - Early effects of experimental cholestasis on the homeostasis of zinc (Zn) and metallothionein (MT) were studied in rats which had undergone bile duct ligation for 0, 3, 6, 9, 12, 16, 20, and 24 h. Transient increases in hepatic Zn levels were observed at 9 h but returned to control values at 12 h. Serum Zn levels increased at 24 h. Cholestasis was confirmed by increased serum alkaline phosphatase (AP) activity. MT increased at 3 h and reached a maximum level at 12 h and remained elevated even at 24 h after the onset of experimental cholestasis. No hepatocellular damage was detected according to the results of alanine aminotransferase (ALT) activities in serum. These results shown that the increases in Zn observed in liver are related to bile stagnation rather than to a hepatocellular damage and that increased MT occurs concurrently with increased hepatic Zn. These observations suggest that the cellular levels of Zn in cholestasis is regulated by homeostatic mechanisms, of which one could be mediated by MT MH - Mexico|Puebla MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0163-4984 UR - ISI:000167741800022 L2 - zinc;metallothionein;cholestasis;EXCESS ZINC; PROGRESSIVE CHOLESTASIS; SERUM; HOMEOSTASIS; DISEASE; COPPER SO - Biological Trace Element Research 2000 ;78(1-3):255-264 256 UI - 14749 AU - Bramon A AU - Escribano R AU - Lucio JL AU - Napsuciale M AU - Pancheri G AD - Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Autonoma Barcelona, Dept Fis, E-08193 Barcelona, SpainUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoEscribano, R, Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy TI - Chiral loops and a(0)(980) exchange in phi -> pi(0)eta gamma AB - The radiative phi --> pi (0)eta gamma decay is discussed emphasizing the effects of the a(0)(980) scalar resonance which dominates the high values of the pi (0)eta invariant mass spectrum. In its lowest part, the proposed amplitude coincides with the reliable and ChPT-inspired contribution coming from chiral loops. The a(0)(980) resonance is then incorporated exploiting the complementarity between ChPT and the linear sigma model for this channel. The recently reported experimental invariant mass distribution and branching ratio can be satisfactorily accommodated in our framework. For the latter, a value of B(phi --> pi (0)eta gamma) in the range (0.75-0.95) x 10(-4) is predicted. (C) 2000 Published by Elsevier Science B.V MH - Italy MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000165679400007 L2 - PERTURBATION-THEORY; DECAYS; LAGRANGIANS; RESONANCES; SYSTEMS; HADRONS; MESONS; NONET; ETA SO - Physics Letters B 2000 ;494(3-4):221-228 257 UI - 15438 AU - Bramon A AU - Escribano R AU - Lucio JL AU - Pancheri G AD - Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Barcelona, SpainIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoBramon, A, Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Barcelona, Spain TI - The ratio Phi -> K+K-/K-0(K)over-bar(0) AB - The ratio Phi --> K+K-/K-0(K) over bar(0) is discussed and its present experimental value is compared with theoretical expectations. A difference larger than two standard deviations is observed. We critically examine a number of mechanisms that could account for this discrepancy, which remains unexplained. Measurements at DA Phi NE at the level of the per mille accuracy can clarify whether there exist any anomaly. (C) 2000 Published by Elsevier Science B.V MH - Italy MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000088686800024 L2 - RADIATIVE-CORRECTIONS; CHIRAL LAGRANGIANS; PHI-FACTORIES; VECTOR-MESONS; BREAKING; DECAY; RESONANCES; SYMMETRY; STATES; REGION SO - Physics Letters B 2000 ;486(3-4):406-413 258 UI - 15149 AU - Brasselet JP AU - Trang LD AU - Seade J AD - Inst Math Luminy, CNRS, UPR 9016, F-13288 Marseille 9, FranceUniv Aix Marseille 1, CMI, F-13453 Marseille, FranceUniv Nacl Autonoma Mexico, Unidad Cuernavaca, Inst Matemat, Cuernavaca 62210, Morelos, MexicoBrasselet, JP, Inst Math Luminy, CNRS, UPR 9016, Campus Luminy,Case 907, F-13288 Marseille 9, France TI - Euler obstruction and indices of vector fields AB - In this paper we give a formula to calculate the Euler obstruction of a complex analytic singularity in the spirit of the Lefschetz Theorem on hyperplane sections. Namely, we show that the Euler obstruction of a singularity is obtained from the Euler obstructions of the singularities of a general hyperplane section passing near the singularity. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0040-9383 UR - ISI:000089475500005 L2 - Euler obstruction;stratified vector fields;Milnor numbers;HOLOMORPHIC FLOW; INDEX SO - Topology 2000 ;39(6):1193-1208 259 UI - 16541 AU - Bravo-Alfaro H AU - Cayatte V AU - Van Gorkom JH AU - Balkowski C AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoObserv Paris, Dept Astrophys Extragalact & Cosmol, F-92195 Meudon, FranceCNRS, UMR 8631, F-92195 Meudon, FranceUniv Paris 07, F-92195 Meudon, FranceColumbia Univ, Dept Astron, New York, NY 10027, USABravo-Alfaro, H, Univ Guanajuato, Dept Astron, Apdo Postal 144, Guanajuato 36000, Mexico TI - VLA HI imaging of the brightest spiral galaxies in Coma AB - We have obtained 21 cm images of 19 spiral galaxies in the Coma cluster, using the VLA in its C and D configurations. The sample selection was based on morphology, brightness, and optical diameters of galaxies within one Abell radius (1 degrees.2). The H I-detected, yet deficient galaxies show a strong correlation in their H I properties with projected distance from the cluster center. The most strongly H I-deficient (Def(HI) > 0.4) galaxies are located inside a radius of 30' (similar to 0.6 Mpc) from the center of Coma, roughly the extent of the central X-ray emission. These central galaxies show clear asymmetries in their H I distribution and/or shifts between the optical and 21 cm positions. Another 12 spirals were not detected in H I with typical H I mass upper limits of 10(8) M.. Seven of the 12 nondetections are located in the central region of Coma, roughly within 30' from the center. The other nondetections are to the east and southwest of the center. We looked for seven so-called blue disk galaxies in Coma in H I and detected six. These galaxies are relatively close to the central region of Coma. The nondetected one is the closest to the center. The six detected blue galaxies are mildly H I deficient. We did a more sensitive search for H I from 11 of the 15 known poststarburst galaxies in Coma. None were detected with typical H I mass limits between 3 and 7 x 10(7) M.. Our results present and enhance a picture already familiar for well-studied clusters. H I poor galaxies (deficient ones and nondetections) are concentrated toward the center of the cluster. The H I morphology of the central galaxies with optical disks extending beyond the H I disks is unique to cluster environments and strongly suggests an interaction with the intergalactic medium (IGM). A new result in Coma is the clumpy distribution of gas deficiency. In the cluster center the deficient galaxies are to the east while the nondetections are to the west. In the outer parts the gas rich galaxies are north of Coma, nondetected spirals are found in the NGC 4944 group to the east, and the NGC 4839 group is to the southwest. This supports recent findings that merging of groups is ongoing in the center of Coma, farther out the NGC 4944 and NGC 4839 must have passed at least once through the core, and the galaxies to the north have yet to fall in MH - France MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 62 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000085275700013 L2 - galaxies : clusters : individual (Coma);VIRGO CLUSTER SPIRALS; NEARBY CLUSTERS; ULTRAVIOLET OBSERVATIONS; NEUTRAL HYDROGEN; STAR-FORMATION; MOLECULAR GAS; SUPERCLUSTER; EVOLUTION; DEFICIENCY; 21-CENTIMETER SO - Astronomical Journal 2000 ;119(2):580-592 260 UI - 14727 AU - Brito R AU - Chimal ME AU - Gaxiola G AU - Rosas C AD - UNAM, Fac Sci, Lab Ecophysiol, Grp Expt Marine Biol, Ciudad Del Carmen, Campeche, MexicoUniv Havana, Ctr Marine Res, Havana, CubaRosas, C, UNAM, Fac Sci, Lab Ecophysiol, Grp Expt Marine Biol, Apdo Post 69, Ciudad Del Carmen, Campeche, Mexico TI - Growth, metabolic rate, and digestive enzyme activity in the white shrimp Litopenaeus setiferus early postlarvae fed different diets AB - Growth rate, soluble-protein content, oxygen consumption, ammonia excretion, and digestive-enzyme activity were studied in Litopenaeus setiferus early postlarvae under four feeding regimens that included combinations of freshly hatched Artemia nauplii, microparticulate commercial diet, and algae. Growth and of postlarvae fed a mixed diet were significantly higher. Artificial diet used alone caused the lowest growth, lowest soluble-protein content, higher ammonia excretion, lowest O:N ratio, and higher proteolytic and amylase activities. The artificial diet stimulated proteolytic activity and ammonia excretion of postlarvae, apparently in response to some deficiency in protein composition of the diet. Based on results in growth, soluble-protein content, enzymatic activity, and metabolic substrate, we determined that partial substitution of Artemia nauplii by artificial diet, with or without addition of algae when rearing early postlarval stages, will benefit the growth and nutritional state of L. setiferus postlarvae. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Campeche PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000165640200002 L2 - shrimp;Litopenaeus setiferus;growth;metabolic rate;enzymes;AMMONIA-N EXCRETION; PENAEUS-SETIFERUS; OXYGEN-CONSUMPTION; BIOCHEMICAL-COMPOSITION; NOTIALIS POSTLARVAE; ONTOGENIC CHANGE; TRYPSIN ACTIVITY; HEAT INCREMENT; PROTEIN LEVEL; LARVAE SO - Journal of Experimental Marine Biology and Ecology 2000 ;255(1):21-36 261 UI - 16592 AU - Brito R AU - Chimal ME AU - Rosas C AD - UNAM, Grp Expt Marine Biol, Lab Ecophysiol, Fac Sci, Campeche, MexicoUniv Havana, Ctr Marine Res, Havana, CubaChimal, ME, UNAM, Grp Expt Marine Biol, Lab Ecophysiol, Fac Sci, Apdo Post 69, Campeche, Mexico TI - Effect of salinity in survival, growth, and osmotic capacity of early juveniles of Farfantepenaeus brasiliensis (decapoda : penaeidae) AB - The effect of salinity in survival, growth and osmotic capacity of juvenile Farfantepenaeus brasiliensis was determined. Survival was not affected by salinities from 15 to 35% during 96 h exposure periods. Shrimps exposed to 5 and 10% were noticeably affected by salinity with a survival of 0 and 48% after 96 h, respectively. Lethal salinity for 50% of the individuals in 96 h (LS50, 96 h) at 28 degrees C was 10%. Growth rate (mg dw day (-1)) was significantly higher at higher salinities. The isosmotic point of early juvenile F. brasiliensis was 794 mOSm kg(-1), at around 25 parts per thousand. Results indicate that F. brasiliensis has low tolerance to low saline environments, and grows better in salinities greater than its isosmotic point. Osmotic capacity seemed to be related to biological characteristics that determine the environmental preferences and behavior, as well as the distribution of this shrimp species. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Campeche PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000084957300006 L2 - SHRIMP PENAEUS-JAPONICUS; AMMONIA-N EXCRETION; OXYGEN-CONSUMPTION; TEMPERATURE; VANNAMEI; OSMOREGULATION; RESPONSES; SETIFERUS; INDICUS; PRAWN SO - Journal of Experimental Marine Biology and Ecology 2000 ;244(2):253-263 262 UI - 12557 AU - Brogliato B AD - ENSIEG, LAG, F-38402 St Martin Dheres, FranceEcole Mines, CAOR, F-75272 Paris, FranceIPN, CINVESTAV, Dept Ingn Elect, Programa Dept Mecatroon, Mexico City 07300, DF, MexicoBrogliato, B, ENSIEG, LAG, Rue Houille Blanche,Domaine Univ,BP 46, F-38402 St Martin Dheres, France TI - Discussion on: 'Passivity versus flatness in the regulation of an exothermic chemical reactor' by H. Sira-Ramirez MH - France MH - Mexico|Distrito Federal PB - PARIS: HERMES SCIENCE PUBLICATION RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Editorial Material AV - English IS - 0947-3580 UR - ISI:000171806700002 L2 - GLOBAL STABILIZATION SO - European Journal of Control 2000 ;6(3):227-228 263 UI - 14833 AU - Bromberg S AU - Medina A AD - UAM Iztapalapa, Dept Matemat, Mexico City, DF, MexicoUniv Montpellier 2, Dept Math, F-34095 Montpellier 5, FranceBromberg, S, UAM Iztapalapa, Dept Matemat, Mexico City, DF, Mexico TI - A homogeneous space-time model with singularities AB - We show the existence of a left invariant pseudo-Riemannian metric on the Oscillator Group of dimension four, such that this group becomes a space-time with singularities in the sense of Hawking and Penrose. As an application we exhibit new incomplete, nonhomeomorphic compact Lorentzian manifolds. (C) 2000 American Institute of Physics. [S0022-2488(00)01612-1] MH - France MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000165488400021 L2 - LIE-ALGEBRAS SO - Journal of Mathematical Physics 2000 ;41(12):8190-8195 264 UI - 15036 AU - Brooks DR AU - de Leon GPP AU - Leon-Regagnon V AD - Univ Toronto, Dept Zool, Ctr Comparat Biol & Biodivers, Toronto, ON M5S 3G5, CanadaUniv Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 04510, DF, MexicoBrooks, DR, Univ Toronto, Dept Zool, Ctr Comparat Biol & Biodivers, Toronto, ON M5S 3G5, Canada TI - Phylogenetic analysis of the Enenterinae (Digenea, Lepocreadiidae) and discussion of the evolution of the digenean fauna of kyphosid fishes AB - Species allocated to the digenean genera Enenterum Linton, 1910; Jeancadenatia Dollfus, 1946; Cadenatella Dollfus, 1946; and Koseiria form a clade within the Lepocreadiidae whose sister group is a clade comprising Neoallolepidapedon Yamaguti, 1965, Callogonotrema, Oshmarin, 1965, Allolepidapedon Yamaguti, 1940, and Bulbocirrus Oshmarin, 1965. Phylogenetic analysis of the Enenterinae based on comparative morphology, produced one most parsimonious tree with a consistency index of 0.72. Cadenatella is paraphyletic. Only 15.3% of character changes are evolutionary losses, supporting earlier reports that parasitic platyhelminths have experienced little secondary simplification during their evolutionary history. The Enenterinae appears to have originated in the Pacific Ocean, becoming associated with kyphosid fishes as a result of an ancient host switch. Subsequent evolutionary diversification reflects widespread geographical dispersal, consistent with the natural history of kyphosids MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Zoology U5 - J;Article AV - English IS - 0300-3256 UR - ISI:000089934900003 L2 - PLATYHELMINTHES; CERCOMERIA; PRONOCEPHALIDAE; COEVOLUTION; PARSIMONY; GENERA; LOOSS SO - Zoologica Scripta 2000 ;29(3):237-246 265 UI - 15164 AU - Brooks WS AU - Griffey CA AU - Steffenson BJ AU - Vivar HE AD - Virginia Polytech Inst & State Univ, Dept Crop & Soil Environm Sci, Blacksburg, VA 24061, USAN Dakota State Univ, Dept Plant Pathol, Fargo, ND 58105, USACIMMYT, ICARDA, Mexico City 06600, DF, MexicoBrooks, WS, Virginia Polytech Inst & State Univ, Dept Crop & Soil Environm Sci, Blacksburg, VA 24061 USA TI - Genes governing resistance to Puccinia hordei in thirteen spring barley accessions AB - Leaf rust, caused by Puccinia hordei, is an important disease of barley in many parts of the world. In the eastern United States, this disease was effectively controlled for over 20 years through the deployment of cultivars carrying the resistance gene Rph7. Isolates of P. hordei with virulence for Rph7 appeared in this region in the early 1990s rendering barley cultivars with this gene vulnerable to leaf rust infection. From a preliminary evaluation test, 13 accessions from diverse geographic locations possessed resistance to P. hordei isolate VA90-34, which has virulence for genes Rph1, 2, 4, 6, 7, 8, and 11. Each of these 13 accessions was crossed with susceptible cvs. Moore or Larker to characterize gene number and gene action for resistance to P. hordei. Additionally, the 13 accessions were intercrossed and crossed to host differential lines possessing genes Rph3, Rph5, and Rph9 to determine allelic relationships of resistance genes. Seedlings of F-1, F-2, and BC1F1 populations were evaluated in the greenhouse for their reaction to P. hordei isolate VA90-34. Leaf rust resistance in six of the accessions including Collo sib, CR270.3.2, Deir Alla 105, Giza 119, Gloria, and Lenka is governed by a single dominant gene located at or near the Rph3 locus. All accessions for which the gene Rph3 was postulated to govern leaf rust resistance, except for Deir Alla 105, likely possess an allele different than Rph3.c found in Estate based on the differential reaction to isolates of P. hordei. The resistance gene in Grit and Donan is located at or near the Rph9 locus. Alleles at both the Rph3 and Rph9 loci confer resistance in Femina and Dorina. In addition to Rph3, Caroline and CR366.13.2 likely possess a second unknown recessive gene for leaf rust resistance. Resistance in Carre 180 is governed by a recessive gene that is different from all other genes considered in this study. Identification of both known and unique genes conferring leaf rust resistance in the barley germplasm included in this study provides breeding programs with the knowledge and opportunity to assess currently used sources of leaf rust resistance and to incorporate new sources of resistance into their programs MH - Mexico|Distrito Federal MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000089512700011 L2 - WILD BARLEY SO - Phytopathology 2000 ;90(10):1131-1136 266 UI - 15235 AU - Brown-Guedira GL AU - Thompson JA AU - Nelson RL AU - Warburton ML AD - Kansas State Univ, USDA ARS, Plant Sci & Entomol Res Unit, Throckmorton Plant Sci Ctr 2001,Dept Agron, Manhattan, KS 66506, USAPioneer Hi Bred Int, Hamel, IL 62046, USAUniv Illinois, Dept Crop Sci, USDA ARS, Plant Physiol & Genet Res Unit, Urbana, IL 61801, USACIMMYT, Appl Biotechnol Ctr, Mexico City 06600, DF, MexicoBrown-Guedira, GL, Kansas State Univ, USDA ARS, Plant Sci & Entomol Res Unit, Throckmorton Plant Sci Ctr 2001,Dept Agron, Manhattan, KS 66506 USA TI - Evaluation of genetic diversity of soybean introductions and North American ancestors using RAPD and SSR markers AB - The genetic base of soybean [Glycine max (L.) Merr.] cultivars developed for North America is very narrow. This may threaten the ability of breeders to sustain improvement and increase vulnerability of the crop to pests. The objective of this research was to assess the relationship of 18 major ancestors of North American soybean germplasm with 87 plant introductions (PIs) that are potential new sources of genetic variation for soybean breeding programs. Genetic distances (GD) among the 105 genotypes analyzed were calculated from 109 polymorphic DNA fragments amplified with random oligonucleotide primers and simple sequence repeat (SSR) primer pairs. Two hierarchical clustering algorithms were combined with data resampling and multidimensional scaling (MDS) to evaluate relationships among the genotypes. Genetic distances ranged from 0.08 to 0.76, with a mean of 0.52. Genotypes were placed in 11 clusters on the basis of a consensus of the different methods utilized. Co-occurrence values calculated from the resampling iterations showed that the stability of clusters varied. The most stable grouping was among ancestors that corresponded with known relationships based on pedigree and maturity. Several groups of PIs are distinct from the majority of the ancestors. These genotypes may be useful to breeders wanting to utilize genetically diverse introductions in soybean improvement MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 38 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000089410400037 L2 - PEDIGREE ANALYSIS; ISOZYME LOCI; LINKAGE MAP; GERMPLASM; CULTIVARS; COEFFICIENT; PARENTAGE SO - Crop Science 2000 ;40(3):815-823 267 UI - 14522 AU - Brown GG AU - Barois I AU - Lavelle P AD - Inst Ecol, Dept Biol Suelos, Xalapa 91000, Veracruz, MexicoIRD, LEST, F-93143 Bondy, FranceUniv Paris 06, F-93143 Bondy, FranceBrown, GG, Inst Ecol, Dept Biol Suelos, AC,AP 63, Xalapa 91000, Veracruz, Mexico TI - Regulation of soil organic matter dynamics and microbial activity in the drilosphere and the role of interactions with other edaphic functional domains AB - The moment the soil enters into contact with an earthworm, both superficially and internally, physicochemical and biological changes take place. The drilosphere represents the whole soil volume under earthworm influence. Thus it includes the body surfaces, the gut and all the internal features of the worm that are in contact with the ingested soil, as well as the external structures (casts, burrows, middens) created by earthworm activities. The extent of the drilosphere and its particular characteristics depend on the species and ecological categories of the earthworm community present as well as the spatial and temporal scale of interest. Spatially, the drilosphere can interact with other soil functional domains and lead to significant changes in the litter system or detritusphere (generally decreasing litter stocks) and the rhizosphere (affecting both root biomass and density), the two main sources of organic matter (OM) additions to the soil, as well as in the aggregatusphere and the porosphere. Drilosphere effects on microbial activity and OM decomposition can be completely different (and opposite) depending on the spatio-temporal scale of observation. At the level of the gut, microbial activity is dramatically stimulated in a matter of a few hours via a mutualistic digestion system. In this process, water and soluble-C in the form of intestinal mucus (the Kiss) produced by the earthworm (Prince Charming) awakens the dormant microflora (Sleeping Beauties), thereby increasing decomposition of the stable forms of soil OM ingested. During gut passage populations of other organisms (e.g. protozoa, nematodes, fungi) may decline with digestion, although these organisms probably form a minor component of the earthworm's energy needs. In the casts and on the burrow walls, the abundant nutrient resources for soil microflora continue the priming effect of the gut, increasing over a short time period mineralization rates and plant nutrient bio-availability. However as castings, particularly of the 'compacting group', and burrow walls begin to dry and stabilize with age (days to weeks), OM decomposition, nutrient mineralization and microbial activity decrease, often reaching levels lower than uningested soil due to 'protection'. Finally at the scale of years to decades and soil profile, it appears that the drilosphere can exert an important regulation on OM Incorporation and turnover rates, and soil C stocks. (C) 2000 Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Veracruz PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 49 U4 - Ecology;Soil Science U5 - J;Review AV - English IS - 1164-5563 UR - ISI:000166423600007 L2 - drilosphere;earthworms;soil properties;micro-organisms;organic matter dynamics;EARTHWORM APORRECTODEA-TRAPEZOIDES; PONTOSCOLEX-CORETHRURUS OLIGOCHAETA; TROPICAL GEOPHAGOUS EARTHWORM; ARBUSCULAR MYCORRHIZAL FUNGI; NO-TILLAGE AGROECOSYSTEMS; UNTILLED LOESS SOIL; LUMBRICUS-TERRESTRIS; LEAF-LITTER; PHYSICOCHEMICAL PROPERTIES; ECOSYSTEM ENGINEERS SO - European Journal of Soil Biology 2000 ;36(3-4):177-198 268 UI - 15549 AU - Brown MJ AU - Hu H AU - Gonzales-Cossio T AU - Peterson KE AU - Sanin LH AU - Kageyama MD AU - Palazuelos E AU - Aro A AU - Schnaas L AU - Hernandez-Avila M AD - Harvard Univ, Sch Med, Channing Lab, Brigham & Womens Hosp,Dept Med, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USAInst Nacl Salud Pucbl, Ctr Invest Salud Poblac, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAUniv Autonoma Chichuahua, Chihuahua, MexicoAmer British Cowdray Hosp, Mexico City, DF, MexicoHu, H, Harvard Univ, Sch Med, Channing Lab, Brigham & Womens Hosp,Dept Med, 181 Longwood Ave, Boston, MA 02115 USA TI - Determinants of bone and blood lead concentrations in the early postpartum period AB - Objective-This study investigated determinants of bone and blood lead concentrations in 430 lactating Mexican women during the early postpartum period and the contribution of bone lead to blood lead. Methods-Maternal venous lead was measured at delivery and postpartum, and bone lead concentrations, measured with in vivo K-x ray fluorescence, were measured post partum. Data on environmental exposure, demographic characteristics, and maternal factors related to exposure to lead were collected by questionnaire. Linear regression was used to examine the relations between bone and blood lead, demographics, and environmental exposure variables. Results-Mean (SD) blood, tibial, and patellar lead concentrations were 9.5 (4.5) mu g/dl, 10.2 (10.1) mu g Pb/g bone mineral, and 15.2 (15.1) mu g Pb/g bone mineral respectively. These values are considerably higher than values for women in the United States. Older age, the cumulative use of lead glazed pottery, and higher proportion of life spent in Mexico City were powerful predictors of higher bone lead concentrations. Use of lead glazed ceramics to cook food in the past week and increased patellar lead concentrations were significant predictors of increased blood lead. Patellar lead concentrations explained one third of the variance accounted for by the final blood lead model. Women in the 90th percentile for patella lead had an untransformed predicted mean blood lead concentration 3.6 mu g/dl higher than those in the 10th percentile. Conclusions-This study identified the use of lead glazed ceramics as a major source of cumulative exposure to lead, as reflected by bone lead concentrations, as well as current exposure, reflected by blood lead, in Mexico. A higher proportion of life spent in Mexico City, a proxy for exposure to leaded gasoline emissions, was identified as the other major source of cumulative lead exposure. The influence of bone lead on blood lead coupled with the long half Life of lead in bone has implications for other populations and suggests that bone stores may pose a threat to women of reproductive age long after exposure has declined MH - USA MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 14 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1351-0711 UR - ISI:000088406100006 L2 - postpartum;blood lead;bone lead;X-RAY-FLUORESCENCE; MEXICO-CITY; EXPOSURE; PREGNANCY; WOMEN; TOXICITY; BIRTH SO - Occupational and Environmental Medicine 2000 ;57(8):535-541 269 UI - 15280 AU - Bruce N AU - Perez-Padilla R AU - Albalak R AD - Univ Liverpool, Dept Publ Hlth, Liverpool L69 3GB, Merseyside, EnglandNatl Inst Resp Dis, Mexico City, DF, MexicoEmory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322, USABruce, N, Univ Liverpool, Dept Publ Hlth, Whelan Bldg, Liverpool L69 3GB, Merseyside, England TI - Indoor air pollution in developing countries: a major environmental and public health challenge AB - Around 50% of people, almost all in developing countries, rely on coal and biomass in the form of wood, dung and crop residues for domestic energy. These materials are typically burnt in simple stoves with very incomplete combustion. Consequently, women and young children are exposed to high levels of indoor air pollution every clay. There is consistent evidence that indoor air pollution increases the risk of chronic obstructive pulmonary disease and of acute respiratory infections in childhood, the most important cause of death among children under 5 years of age in developing countries. Evidence also exists of associations with low birth weight, increased infant and perinatal mortality, pulmonary tuberculosis, nasopharyngeal and laryngeal cancer, cataract, and, specifically in respect of the use of coal, with lung cancer. Conflicting evidence exists with regard to asthma. All studies are observational and very few have measured exposure directly, while a substantial proportion have not dealt with confounding, As a result, risk estimates are poorly quantified and may be biased. Exposure to indoor air pollution may be responsible for nearly 2 million excess deaths in developing countries and for some 4% of the global burden of disease. Indoor air pollution is a major global public health threat requiring greatly increased efforts in the areas of research and policy-making. Research on its health effects should be strengthened, particularly in relation to tuberculosis and acute lower respiratory infections. A more systematic approach to the development and evaluation of interventions is desirable, with clearer recognition of the interrelationships between poverty and dependence on polluting fuels MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 116 U4 - Public, Environmental & Occupational Health U5 - J;Review AV - English IS - 0042-9686 UR - ISI:000089263900003 L2 - air pollution, indoor-adverse effects;fossil fuels-toxicity;lung diseases;smoke inhalation injury;cataract;developing countries;PAPUA-NEW-GUINEA; BIOMASS FUEL COMBUSTION; LOWER RESPIRATORY-INFECTIONS; DOMESTIC SMOKE POLLUTION; DIFFERENT COOKING FUELS; YOUNG GAMBIAN CHILDREN; LUNG-CANCER MORTALITY; WOOD-BURNING STOVES; LOW-BIRTH-WEIGHT; RISK-FACTORS SO - Bulletin of the World Health Organization 2000 ;78(9):1078-1092 270 UI - 16338 AU - Brule T AU - Colas-Marrufo T AU - Tuz-Sulub A AU - Deniel C AD - IPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoUniv Bretagne Occidentale, Inst Univ Europeen Mer, F-29820 Brest, FranceBrule, T, IPN, CINVESTAV, Unidad Merida, Antigua Carretera Progreso Km 6,AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Evidence for protogynous hermaphroditism in the serranid fish Epinephelus drummondhayi (Perciformes : Serranidae) from the Campeche Bank in the southern Gulf of Mexico MH - France MH - Mexico|Yucatan PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000085998300018 L2 - EASTERN GULF; ATLANTIC BIGHT; OF-MEXICO; RED HIND; MYCTEROPERCA-BONACI; LIFE-HISTORY; GROUPER; REPRODUCTION; GROWTH; GUTTATUS SO - Bulletin of Marine Science 2000 ;66(2):513-521 271 UI - 15224 AU - Bryk P AU - Lajtar L AU - Pizio O AU - Sokolowska Z AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandPolish Acad Sci, Inst Agrophys, PL-20290 Lublin 27, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoSokolowska, Z, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Adsorption of fluids in pores formed between two hard cylinders AB - We study adsorption in pores with curved hard walls that are made of two uniaxial cylinders by using a density functional approach. Two cases are considered: adsorption of hard spheres and adsorption of a Lennard-Jones fluid, In the case of hard spheres, we perform a comparison with the results of grand canonical ensemble Monte Carlo data. This comparison indicates that the applied approach is capable of reproducing the fluid structure quite satisfactorily. For hard spheres, we also make a comparison of the total adsorption effect (expressed as the average density of a confined fluid) inside pores with curved walls with that evaluated for a slitlike pore. We have found that the differences between adsorption in pores with curved walls and in slits with the same wall-to-wall distance are quite low. The calculations for the Lennard-Jones fluid have been concerned with the investigation of the capillary evaporation and with the evaluation of phase diagrams for different pores, including slitlike pores. We have found that the curvature of the pore walls shifts the transition toward lower values of the chemical potential and increases slightly the value of the critical temperature in comparison with the values obtained for a slitlike pore. (C) 2000 Academic Press MH - Mexico|Distrito Federal MH - Poland PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000089390500022 L2 - SURFACES SO - Journal of Colloid and Interface Science 2000 ;229(2):526-533 272 UI - 16617 AU - Bryk P AU - Reszko-Zygmunt J AU - Rzysko W AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling PhysicoChem Proc, Fac Chem, PL-20031 Lublin, PolandMarie Curie Sklodowska Univ, Dept Analyt Chem, Fac Chem, PL-20031 Lublin, PolandUNAM, Inst Quim, Coyoacan 04510, DF, MexicoBryk, P, Marie Curie Sklodowska Univ, Dept Modelling PhysicoChem Proc, Fac Chem, PL-20031 Lublin, Poland TI - The phase behaviour of a fluid in a slitlike pore with permeable walls AB - The confinement of a lattice fluid in a set of slitlike pores separated by semipermeable walls with a finite width has been studied. The walls are modelled by a square-well repulsive potential with a finite height. The thermodynamic properties and the phase behaviour of the system are evaluated by means of Monte Carlo simulations. For some states theoretical calculations have been made using a mean-field-type theory. These investigations confirm previous findings for confined Lennard-Jones fluids, obtained from a density functional approach. For intermediate and low potential barriers that separate the pores, the isotherms exhibit two hysteresis loops and the liquid-vapour coexistence curve divides into two branches describing condensation inside the pore and inside the permeable wall. These two branches are separated by a triple point. At temperatures lower than the triple point temperature, the condensation takes place instantaneously in both the pore and inside the permeable wall. It was found that when the temperature is scaled by the bulk critical temperature, the phase diagram emerging from this simple mean-field treatment is close to the phase diagram obtained from simulation MH - Mexico|Distrito Federal MH - Poland PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000084750500006 L2 - MONTE-CARLO SIMULATION; SURFACE; ADSORPTION SO - Molecular Physics 2000 ;98(2):117-123 273 UI - 16464 AU - Bueno JJP AU - Rodriguez ME AU - Zelaya-Angel O AU - Baquero R AU - Gonzalez-Hernandez J AU - Banos L AU - Fitzpatrick BJ AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07360, DF, MexicoIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro 76040, Qro, MexicoIPN, Lab Invest Mat, CINVESTAV, Queretaro 76001, MexicoUNAM, Inst Invest Mat, Mexico City, DF, MexicoOpt Semicond Inc, Peekskill, NY 10566, USARodriguez, ME, Univ Toronto, Dept Mech & Ind Engn, 5 Kings Coll Rd, Toronto, ON M5S 3G8, Canada TI - Growth and characterization of Cd1-xZnxTe crystals with high Zn concentrations AB - The crystalline quality of large grain size Cd1-xZnxTe with high Zn concentrations(0.45 < x < 0.85) grown by a zone melting process was investigated using photoluminescence, X-ray diffraction, optical transmission and micro-Raman measurements. We have found that extrinsic and intrinsic factors lead to Zn segregation encountered in both the radial and the longitudinal directions. The degree of segregation depends on the nominal Zn concentration. In addition, small precipitates of tellurium are found in the regions with low Zn concentrations in the solid solution. Such precipitates are absent in regions with high Zn concentrations. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000085508500020 L2 - semiconductors;crystal growth;point defects;optical properties;luminescence;SEMICONDUCTORS SO - Journal of Crystal Growth 2000 ;209(4):701-708 274 UI - 15989 AU - Buhse T AU - Durand D AU - Kondepudi D AU - Laudadio J AU - Spilker S AD - Wake Forest Univ, Dept Chem, Winston Salem, NC 27109, USAUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoKondepudi, D, Wake Forest Univ, Dept Chem, Winston Salem, NC 27109, USA TI - Chiral symmetry breaking in crystallization: The role of convection AB - Chiral symmetry breaking in stirred crystallization of sodium chlorate (NaClO3) occurs via the production of secondary crystals from a single "mother crystal." Martin, Tharrington, and Wu [Phys. Rev. Lett. 77, 2826 (1996)] investigated this phenomenon and concluded that it was mechanical crushing of a crystal by the stir bar, not convection, that produces secondary crystals from a single crystal, Here we report the generation of secondary crystals of sodium chlorate when a saturated solution of sodium chlorate is simply made to flow over a sodium bromate (NaBrO3) crystal. This clearly shows that fluid flows alone can generate and disperse secondary nuclei MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000086941600038 L2 - SODIUM-CHLORATE CRYSTALLIZATION; SECONDARY NUCLEATION; KINETICS; SEED SO - Physical Review Letters 2000 ;84(19):4405-4408 275 UI - 16299 AU - Bukovsky A AU - Ayala ME AU - Dominguez R AU - Keenan JA AU - Wimalasena J AU - McKenzie PP AU - Caudle MR AD - Univ Tennessee, Med Ctr, Dept Obstet & Gynecol, Grad Sch Med, Knoxville, TN 37996, USAUNAM, Fac Estudios Profesionales Zaragoza, Reprod Biol Lab, Mexico City, DF, MexicoSt Jude Childrens Res Hosp, Dept Mol Pharmacol, Memphis, TN 38105, USABukovsky, A, Univ Tennessee, Med Ctr, Dept Obstet & Gynecol, Grad Sch Med, Knoxville, TN 37996 USA TI - Postnatal androgenization induces premature aging of rat ovaries AB - In the present paper, we report that ovaries of adult rats treated with testosterone propionate (TP) on a critical postnatal Day 5 exhibit histologic and immunohistochemical findings which resemble those of the anovulatory ovaries in middle-aged female rats. The sterile rat model has been long known whereas ovarian failure seems to be a reason for anovulation wi th normal hypothalamo-pituitary-gonadotropin background. Appropriate function of ovarian steroidogenic cells is also regulated by mesenchymal cells. To characterize the ovarian failure, we studied the histology, luteinizing hormone receptor (LHR) expression, and characterized changes of vascular pericytes, T cells, and dendritic cells in ovarian steroidogenic compartments consisting of interstitial cells (ISC) of ovarian interstitial glands, and granulosa and theca interna cells of ovarian follicles. Normal adult ovaries contained 63% of mature interstitial glands. The mature ISC exhibited moderate cytoplasmic and strong surface LHR expression and fine (<5 mu m) cytoplasmic vacuoles (ISC of 'luteal type'). They originated from young ISC of 'thecal type,' which exhibited strong cytoplasmic LHR expression. Remaining 37% were aged interstitial glands, which consisted of aged ISC (increased cytoplasmic vacuolization, nuclear pyknosis, and reduced surface LHR expression) and regressing ISC tweak cytoplasmic and no surface LHR expression). However, no mature ISC of 'luteal type' were detected in anovulatory ovaries of adult rats 45- and 60-day-old) injected with TP (100 or 500 mu g) on postnatal Day 5 (TP rats). Their ovaries contained 96% of aged interstitial glands with aged and regressing ISC. Remaining 4% were abnormal interstitial glands with direct transition of young ISC of 'thecal type' into aged ISC (young/aged glands). Lack of mature ISC, and similar amount of aged (96%) and young/aged interstitial glands (4%) was also detected in anovulatory ovaries of untreated persistently estrous middle-aged (IO-month-old) females (aging PE mts). The aging process in TP and aging PE rats was accompanied by regression of vascular pericytes, T cells, and dendritic cells within the interstitial glands. In addition, anovulatory ovaries of TP rats and aging PE females contained mature follicles exhibiting LHR overexpression by granulosa cells, and aged (cystic) follicles with reduced layers of granulosa cells lacking LHR expression. In contrast, when the mts were injected with 500 mu g of TP later, on postnatal Day 10, the adult females exhibited estrous cycles and normal ovaries with corpora lutea. These results show that injection of TP during the critical postnatal period causes a lack of mature and preponderance of aged ISC in adult ovaries, accompanied by degeneration of mesenchymal cells. We suggest that mesenchymal cells regulate qualitative aspects of tissue-specific cells, and this function of mesenchymal cells is programmed during the critical period of development. (C) 2000 Elsevier Science Inc. An rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Review AV - English IS - 0039-128X UR - ISI:000086092800003 L2 - androgens;ovarian steroidogenic cells;cellular aging;mesenchymal cells;ontogeny;immune adaptation;THECA-INTERSTITIAL CELLS; LUTEINIZING-HORMONE RECEPTOR; FOLLICLE-STIMULATING-HORMONE; NECROSIS-FACTOR-ALPHA; HUMAN CORPORA-LUTEA; GROWTH-FACTOR-ALPHA; IN-VITRO; GRANULOSA-CELLS; IMMUNE-SYSTEM; INTRAEPITHELIAL LYMPHOCYTES SO - Steroids 2000 ;65(4):190-205 276 UI - 14880 AU - Bunton CA AU - Gillitt ND AU - Mhala MM AU - Moffatt JR AU - Yatsimirsky AK AD - Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106, USANatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoBunton, CA, Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA TI - Micellar charge effects upon hydrolyses of substituted benzoyl chlorides. Their relation to mechanism AB - Micellar rate effects on hydrolyses of substituted benzoyl chlorides, 1, depend on headgroup charge and electron donation or withdrawal by substituents. Micellized sodium dodecyl sulfate, SDS, inhibits hydrolyses, and first-order rate constants in the micellar pseudophase, k'(M), decrease, relative to those in water, k'(W), over a range of ca. 10, but in cetyl trimethylammonium chloride, CTACl, k'(M)/k'(W) > 1 for hydrolyses of 1,3,5-(NO2)(2) and 1, 4-NO2, and decreases steeply with electron-donating substituents in the following sequence: 1,4-Cl approximate to 4-Br > 4-H > 4-Me > 4-OMe, over a range of > 10(3). Cetyl trimethylammonium bromide and mesylate behave like CTACl. Fits to the Hammett equation give rho approximate to 1 in SDS and rho approximate to 4 in CTACl. Anionic micelles have higher interfacial polarities than cationic micelles, but micellar and solvent effects do not correspond because over a range of solvents, H2O to H2O-MeCN, 1:1 w/w plots of log k'(W) against sigma go through minima with positive rho for 1, 3,5-(NO2)(2), and 4-NO2 and negative for the other substrates. The micellar effects correspond to differing extents of bond-making and -breaking in the transition state. Values of k(+)/k(-) (rate constants in CTACl and SDS) decrease strongly with increasing electron donation by substituents. Micellar rate effects in hydrolyses of benzyl bromide and 4-methoxybenzyl chloride are similar to those with the benzoyl chlorides. Although data were analyzed by a pseudophase treatment, application of transition state theory and reported micellar surface potentials allows estimation of local charge at the reaction center for hydrolyses of the benzoyl chlorides MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000165267300008 L2 - NUCLEOPHILIC-SUBSTITUTION; QUANTITATIVE TREATMENT; ASSOCIATION COLLOIDS; AQUEOUS INTERFACES; REACTION-RATES; ION; POLARITY; PROBES; ACETONITRILE; SURFACTANTS SO - Langmuir 2000 ;16(23):8595-8603 277 UI - 15716 AU - Bunton CA AU - Yatsimirsky AK AD - Univ Calif Santa Barbara, Dept Biochem & Chem, Santa Barbara, CA 93106, USANatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoBunton, CA, Univ Calif Santa Barbara, Dept Biochem & Chem, Santa Barbara, CA 93106 USA TI - Comparisons and analyses of theoretical treatments of micellar effects upon ion-molecule reactions. Relevance to amide exchange AB - Reported second-order rate constants of H+ and OH- catalyzed amide exchanges in micellar solutions, relative to those in water, have been claimed to be inexplicable in terms of pseudophase treatments of micellar rate effects, and the Bronsted-Bjerrum treatment was invoked to fit the data (Perrin, C. L.; et al. J. Am. Chem. Sec. 1999, 121, 2448). Rate constants of amide exchange, based on pH measurements in surfactant solutions, are only approximate, but examination of the data and comparisons with evidence on other reactions show that they are qualitatively consistent with pseudophase treatments. Micellar effects upon rate constants of deacylations by OH- and acid hydrolyses of dioxolanes, analyzed with pseudophase treatments, were considered for the purpose of comparison. The pseudophase and Bronsted-Bjerrum formalisms are equivalent in rationalizing micellar rate data, although the former appears to be descriptively more useful as applied to reactions of apolar organic compounds. Interrelations between the two approaches are analyzed in terms of transfer free energies of reactants and transition states. Potentiometric titrations of HCl with NaOH were made in solutions of sodium dodecyl sulfate and cetyl trimethylammonium chloride in order to estimate the autoprotolysis constant of water and to establish the relation of pH to concentrations of H+ and OH- in unbuffered micellar solutions MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000088052400015 L2 - ACID-BASE EQUILIBRIA; QUANTITATIVE TREATMENT; CATIONIC MICELLES; TRANSITION-STATE; PROTON-EXCHANGE; HYDROXAMIC ACIDS; REACTION-RATES; SURFACTANT; PH; CATALYSIS SO - Langmuir 2000 ;16(14):5921-5931 278 UI - 14743 AU - Burgess-Beusse B AU - Recillas-Targa F AU - Felsenfeld G AD - Natl Autonomous Univ Mexico, Inst Cellular Physiol, Dept Mol Genet, Mexico City 04510, DF, MexicoNIDDKD, Mol Biol Lab, NIH, Bethesda, MD 20892, USA TI - Functional analysis of the chicken beta-globin insulator MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 1079-9796 UR - ISI:000165787500079 SO - Blood Cells Molecules and Diseases 2000 ;26(5):510-510 279 UI - 16073 AU - Burgio G AU - De Pietri R AU - Morales-Tecotl HA AU - Urrutia LF AU - Vergara JD AD - Univ Parma, Dipartimento Fis, I-43100 Parma, ItalyIst Nazl Fis Nucl, Grp Collegato Parma, I-43100 Parma, ItalyCNRS, Ctr Phys Theor, F-13288 Marseille, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Dept Fis Atlas Energias, Mexico City 04510, DF, MexicoBurgio, G, Univ Parma, Dipartimento Fis, Viale Sci, I-43100 Parma, Italy TI - Hamiltonian LGT in the complete Fourier analysis basis AB - The main problem in the Hamiltonian formulation of Lattice Gauge Theories is the determination of an appropriate basis avoiding the over-completeness arising from Mandelstam relations. We short-cut this problem using Harmonic analysis on Lie-Groups and intertwining operators formalism to explicitly construct a basis of the Hilbert space. Our analysis is based only on properties of the tensor category of Lie-Group representations. The Hamiltonian of such theories is calculated yielding a sparse matrix whose spectrum and eigenstates could be exactly derived as functions of the coupling g(2) MH - France MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000086729700259 SO - Nuclear Physics B-Proceedings Supplements 2000 ;83-4():926-928 280 UI - 16428 AU - Burgio G AU - De Pietri R AU - Morales-Tecotl HA AU - Urrutia LF AU - Vergara JD AD - Univ Parma, Dipartimento Fis, I-43100 Parma, ItalyIst Nazl Fis Nucl, Grp Collegato Parma, Parma, ItalyCNRS, Ctr Phys Theor, F-13288 Marseille 9, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoNatl Autonomous Univ Mexico, Dept Fis Altas Energias, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBurgio, G, Univ Parma, Dipartimento Fis, Parco Area Sci 7-A, I-43100 Parma, Italy TI - The basis of the physical Hilbert space of lattice gauge theories AB - Non-linear Fourier analysis on compact groups is used to construct an orthonormal basis of the physical (gauge invariant) Hilbert space of Hamiltonian lattice gauge theories. In particular, the matrix elements of the Hamiltonian operator involved are explicitly computed. Finally, some applications and possible developments of the formalism are discussed. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000085620700004 L2 - harmonic analysis;Lie groups;Hamiltonian lattice gauge theories;Mandelstam identities;LOOP REPRESENTATION; QUANTUM-GRAVITY; SU(N) SO - Nuclear Physics B 2000 ;566(3):547-561 281 UI - 15107 AU - Burlak G AU - Koshevaya S AU - Hayakawa M AU - Gutierrez E AU - Grimalsky V AD - Autonomous State Univ Morelos, Ctr Res Engn & Appl Sci, Cuernavaca 62210, Morelos, MexicoUniv Electrocommun, Dept Elect Engn, Tokyo 1828585, JapanNatl Inst Astrophys Opt & elect, Puebla 72000, MexicoBurlak, G, Autonomous State Univ Morelos, Ctr Res Engn & Appl Sci, Ave Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Acousto-optic solitons in fibers AB - It is shown that the deceleration of light pulses down to the velocity of a sound value can be realized in a case of unidirectional parametric interaction of two electromagnetic waves with an acoustic one in the regime of forming three wave acousto-optic solitons. This nonlinear acousto-optic interaction can be realized in long distance systems like fibers. As the result of such an interaction, two types of acousto-optic envelope solitons can propagate in fibers. Modulation of the amplitude of the electromagnetic pump wave can control the soliton velocity MH - Japan MH - Mexico|Morelos MH - Mexico|Puebla PB - TOKYO: OPTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Review AV - English IS - 1340-6000 UR - ISI:000089674800009 L2 - nonlinearity;optical fiber;acousto-optic soliton;controlling;velocity SO - Optical Review 2000 ;7(4):323-325 282 UI - 15389 AU - Burlak G AU - Grimalsky V AU - Koshevaya S AD - Autonomous State Univ Morelos, Ctr Res Engn & Appl Sci, Cuernavaca, Morelos, MexicoNASU, Space Res Inst, NSAU, Kiev, UkraineBurlak, G, Autonomous State Univ Morelos, Ctr Res Engn & Appl Sci, ZP 62210, Cuernavaca, Morelos, Mexico TI - Variations of the transverse structure of coupled acousto-gravity - the Rayleigh waves in multilayered earth - atmosphere system AB - The transverse distribution of coupled acousto-gravity waves in an atmosphere and a Rayleigh wave in a layered system Earth - atmosphere is investigated. Special attention is given to a mode of strong coupling of waves in a solid substrate with oscillations in an upper medium (atmosphere) when the phase velocities of the waves are close (coupling point, or a point of synchronism). Is shown that in this point the frequency shift induced by the mutual influence of waves becomes maximal. In that vicinity of a coupling point, a strong change of the cross structure of the wave in air takes place. A sharp dependence of the factor of exponential growth of the oscillatory velocity of acousto-gravity waves with an altitude due to parameters of a solid substrate is demonstrated. The frequency band of the exponential growth is limited at high frequencies. As a result, at higher frequencies a wave becomes localized near the surface of the Earth. The transition point from increase to decreasing is determined by a point of synchronism with a Rayleigh wave in the ground substrate. The account of viscosity in the soil causes a weak wave attenuation but does not change the general physical picture of the wave interaction MH - Mexico|Morelos MH - Ukraine PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0281-1847 UR - ISI:000088902900025 SO - Physica Scripta 2000 ;62(2-3):219-223 283 UI - 15713 AU - Burns D AU - Reynolds WF AU - Buchanan G AU - Reese PB AU - Enriquez RG AD - Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, CanadaUniv W Indies, Dept Chem, Kingston, JamaicaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 045100, DF, MexicoReynolds, WF, Univ Toronto, Dept Chem, 80 St George St, Toronto, ON M5S 3H6, Canada TI - Assignment of H-1 and C-13 spectra and investigation of hindered side-chain rotation in lupeol derivatives AB - Complete H-1 and C-13 spectral assignments are reported for lupeol (1a) and two derivatives where the C-30 methyl group is replaced by CH2OH (1b) and HC=O (1c). Compound 1c shows conformationally dependent substituent effects on H-1 chemical shifts. It also shows line broadening of some C-13 signals at 25 degrees C, suggesting hindered rotation of the side-chain group. This is confirmed by low-temperature spectra which show splitting of broadened peaks into pairs in a ca 2:1 area ratio. The free energy of activation of hindered rotation is estimated as 13.5 kcal mol(-1). By contrast, 1a shows no evidence of hindered rotation down to -40 degrees C although NOE data suggest the presence of two conformers. Spartan molecular mechanics calculations confirm the presence of two stable conformers for 1a and 1c but overestimate the rotational barrier in 1a. The additional barrier in 1c probably reflects loss of conjugative stabilization during rotation. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Canada MH - Jamaica MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000087980400002 L2 - NMR;H-1 NMR;C-13 NMR;lupeol derivatives;hindered rotation;molecular mechanics;CHEMICAL-SHIFTS; NMR SO - Magnetic Resonance in Chemistry 2000 ;38(7):488-493 284 UI - 16472 AU - burto-Oropeza O AU - Sala E AU - Sanchez-Ortiz C AD - Univ Autonoma Baja California Sur, Dept Biol Marina, La Paz 23080, BCS, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USASala, E, Univ Autonoma Baja California Sur, Dept Biol Marina, La Paz 23080, BCS, Mexico TI - Feeding behavior, habitat use, and abundance of the angelfish Holacanthus passer (Pomacanthidae) in the southern Sea of Cortes AB - Feeding behavior and habitat use of the king angelfish, Holacanthus passer, was studied in the southern Sea of Cortes, Mexico. H. passer fed on benthic communities (algae and sessile invertebrates) and in the water column (mainly feces from the damselfish Chromis atrilobata). Although there were not significant differences in feeding rate between sexes, coprophagy was more common in males, while grazing was more common in females. Spatial distribution of size classes followed a pattern of decreasing size with increasing depth. Feeding rate was significantly different among habitats: small females had a higher feeding rate on the bottom, big females and small males had similar feeding rates from the bottom to 3 m above the bottom, and big males had higher feeding rates from 5 m above the bottom to the surface. Habitat was clearly partitioned, and there was significant habitat overlap only between big females and small males. The abundance of H. passer was partly explained (34% of the total variance) by the abundance of the damselfish C. atrilobata. There was a clear trophic association between C. atrilobata schools and H. passer feeding damselfish feces in the water column. The sex ratio male:female of H. passer populations was > 1 at several sites, an unusual pattern for a protogynous fish. The sex ratio on the H. passer water column stock was also biased towards males at most sites. Although there is a positive relationship between C. atrilobata abundance and H. passer, there are factors other than damselfish abundance which cause this dominance of males MH - Mexico|Baja California Sur MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000085550100009 L2 - coprophagy;damselfish feces;omnivory;sex ratio;space partitioning;REPRODUCTIVE-BEHAVIOR; SOCIAL-ORGANIZATION; FISHES; CENTROPYGE SO - Environmental Biology of Fishes 2000 ;57(4):435-442 285 UI - 14763 AU - Burton AM AU - Olsen P AD - James Cook Univ N Queensland, Dept Zool, Townsville, Qld 4811, AustraliaAustralian Natl Univ, Div Bot & Zool, Canberra, ACT 0200, AustraliaBurton, AM, Org Conservac Estudio & Anal Naturaleza AC, 22 Diciembre 1,Col Manuel Camacho, Naucalpan 53910, Mexico, Mexico TI - Niche partitioning by two sympatric Goshawks in the Australian wet tropics: Ranging behaviour AB - Two medium-sized woodland hawks, the Grey Goshawk Accipiter novaehollandiae and the Brown Goshawk Accipiter fasciatus, are sympatric in the Australian Het tropics. Because females are considerably larger than males, the two species and sexes form a four-member guild. Typically, when similar raptor species occur together they partition resources. Radio-tracking was used to study habitat use and composition, and interactions between the Australian goshawks. Sample sizes were small and there was considerable individual variation. Nevertheless, there was evidence of niche partitioning according to home range size and overlap, habitat composition and habitat use. In general, both species frequented forests or woodlands and adjacent open country. Consistent with morphological, dietary and hunting differences, Grey Goshawks, especially the males, frequented closed forest types and Brown Goshawks more open habitats of woodlands, crops and edges. In the nonbreeding season, females ranged widely and their ranges overlapped both inter- and intra-specifically, whereas those of males of each species tended not to overlap with males and females of either species. In the breeding season, home range overlap declined markedly between neighbouring pairs of the two species, and there was no overlap between the females. The two species have relatively small home ranges, attributable to their rich habitat. In turn, this may facilitate co-existence of two such similar-sized accipiters. Nevertheless, there was evidence of competition between the two most similar-sized members of the guild, the male Grey Goshawk and the female Brown Goshawk MH - Australia MH - Mexico|Estado De Mexico PB - HAWTHORN EAST: ROYAL AUSTRALASIAN ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0158-4197 UR - ISI:000165652400008 L2 - INTERFERENCE COMPETITION; ACCIPITER; SEGREGATION; FASCIATUS; RAPTORS SO - Emu 2000 ;100():216-226 286 UI - 16320 AU - Busi E AU - Howes BD AU - Pogni R AU - Basosi R AU - Tinoco R AU - Vazquez-Duhalt R AD - Univ Siena, Dept Chem, I-53100 Siena, ItalyUNAM, Inst Biotechnol, Cuernavaca 62271, Morelos, MexicoBasosi, R, Univ Siena, Dept Chem, Pian Mantellini 44, I-53100 Siena, Italy TI - Modified cytochrome c/H2O2 system: spectroscopic EPR investigation of the biocatalytic behaviour AB - In recent years there has been growing interest in methods for the degradation of polycyclic aromatic hydrocarbons. Cytochrome c (Cyt c) systems in the presence of H2O2 are able to oxidize various aromatic compounds. In order to investigate ways of improving the performance of Cyt c/H2O2 oxidation systems, site-directed mutagenesis, and chemical modifications on the hemoprotein surface with poly(ethylene glycol) and methylation of the active site have been performed. The EPR technique and UV-VIS spectroscopy have been used to identify radical intermediates and heme iron spin states of the chemical modified Cyt c (PEG-Cyt-Met) and Cyt c mutants. (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Chemistry, Physical U5 - J;Article AV - English IS - 1381-1177 UR - ISI:000086042300003 L2 - cytochrome c;EPR;spin trapping;hemoprotein;peroxidase activity;MISCIBLE ORGANIC-SOLVENTS; LIGNIN PEROXIDASE; YEAST ISO-1-CYTOCHROME-C; HYDROPEROXIDES; OXIDATION; BINDING SO - Journal of Molecular Catalysis B-Enzymatic 2000 ;9(1-3):39-48 287 UI - 14730 AU - Bustamante J AU - Montalvo F AD - Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72570, MexicoUniv Extremadura, Dept Matemat, E-06071 Badajoz, SpainBustamante, J, Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72570, Mexico TI - Stone-Weierstrass theorems in C*(X) AB - In this paper we consider some conditions for a given function f epsilon C*(X) to belong to the uniform closure of a subset W subset of C*(X). We start with a general theorem which admits a sensible improvement when W, or more generally its uniform closure cl( W), is a lattice. Also, we obtain an approximation result when W or cl(W) is a cone. From this result we can derive one by Blasco and Molto for linear subspaces and one by Garrido and Montalvo for semi-affine lattices. Finally, using "multipliers," we extend to C*(X) some other known results for the compact case, such as the Nachbin theorem about the uniform closure of an A-module. (C) 2000 Academic Press MH - Mexico|Puebla MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-9045 UR - ISI:000165766100008 L2 - uniform closure;Lebesgue sets;chain condition;multipliers SO - Journal of Approximation Theory 2000 ;107(1):143-159 288 UI - 16582 AU - Butikofer T AU - Jung C AU - Seligman TH AD - Univ Basel, Inst Phys, CH-4056 Basel, SwitzerlandUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoButikofer, T, Univ Basel, Inst Phys, CH-4056 Basel, Switzerland TI - Extraction of information about periodic orbits from scattering functions AB - As a contribution to the inverse scattering problem for classical chaotic systems, we show that we can select sequences of intervals of continuity, each of which yields the information about period, eigenvalue and symmetry of one unstable periodic orbit. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000084957500012 L2 - chaos;chaotic scattering;inverse scattering problem;MAGNETIC DIPOLE SO - Physics Letters A 2000 ;265(1-2):76-82 289 UI - 15582 AU - Caba M AU - Pau KYF AU - Beyer C AU - Gonzalez A AU - Silver R AU - Spies HG AD - Oregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Div Reprod Sci, Beaverton, OR 97006, USAUniv Veracruzana, Inst Invest Biol, Reprod Biol Lab, Xalapa 91000, Veracruz, MexicoUniv Autonoma Tlaxcala, CINVESTAV, Ctr Invest Reprod Anim, Tlaxcala 90000, MexicoColumbia Univ, Dept Psychol, New York, NY 10027, USAOregon Hlth Sci Univ, Dept Cell & Dev Biol, Portland, OR 97201, USASpies, HG, Oregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Div Reprod Sci, 505 NW 185th Ave, Beaverton, OR 97006 USA TI - Coitus-induced activation of c-fos and gonadotropin-releasing hormone in hypothalamic neurons in female rabbits AB - Copulation induces hypothalamic release of neuropeptides and catecholamines, especially gonadotropin-releasing hormone (GnRH) and norepinephrine, in female rabbits. The forebrain distribution of GnRH cells and the cellular events responsible for the coitally induced GnRH surge have not been identified. We characterized the expression of c-fos mRNA before (0 min) and up to 60 min after coitus in forebrain tissues of mated and nonmated females and compared these findings with those in which single- and double-labeled GnRH/Fos protein cells were identified by immunocytochemistry (ICC). Enhanced expression of fos-mRNA occurred 30 min after coitus, especially in the anteroventral periventricular nucleus (AVPV), the encapsulated portion of the bed nucleus of the stria terminalis (BNSTe) and the ventrolateral hypothalamus (VLH); this increased fos-mRNA activity remained elevated at 60 min in the AVPV and VLH, and was reflected by Fos protein expression 90 min postcoitus. Both ICC Fos-labeled and ICC GnRH-labeled cells were widely distributed throughout the forebrain with postcoital increased double-labeling in the preoptic-septal areas, the anterior-medial hypothalamus and the VLH. The increased number of dual-labeled and unchanged number of single-labeled GnRH cells after coitus suggest some GnRH neurons were non-detected before coitus. Many dual-labeled neurons were adjacent to Fos-labeled cells, suggesting enhanced interneuronal input to GnRH cells after coitus. Collectively, the results suggest that coitus activates hypothalamic GnRH neurons via several loci that include the AVPV, BNSTe and VLH. The distinct anatomical location of the AVPV, BNSTe and VLH further suggests that coital signals may reach the hypothalamus via separate neural pathways that are likely developed within the brainstem. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Tlaxcala MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences U5 - J;Article AV - English IS - 0169-328X UR - ISI:000088334200007 L2 - c-fos;gonadotropin-releasing hormone;hypothalamus;immunocytochemistry;in situ hybridization;coitus;ANTEROVENTRAL PERIVENTRICULAR NUCLEUS; PREOPTIC AREA; NEUROPEPTIDE-Y; SEXUAL DIMORPHISM; RAT-BRAIN; EXPRESSION; GNRH; NOREPINEPHRINE; INDUCTION; SECRETION SO - Molecular Brain Research 2000 ;78(1-2):69-79 290 UI - 15866 AU - Caba M AU - Bao JZ AU - Pau KYF AU - Spies HG AD - Oregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Div Reprod Sci, Beaverton, OR 97006, USAOregon Hlth Sci Univ, Dept Cell & Dev Biol, Portland, OR 97201, USAUniv Veracruzana, Lab Biol Reprod, Inst Invest Biol, Xalapa 91000, Veracruz, MexicoSpies, HG, Oregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Div Reprod Sci, Beaverton, OR 97006 USA TI - Molecular activation of noradrenergic neurons in the rabbit brainstem after coitus AB - Our previous studies indicate that coitus in female rabbits induces a gonadotropin-releasing hormone (GnRH) surge that is preceded by an increase in hypothalamic norepinephrine (NE) release. The additional findings of an enhanced tyrosine hydroxylase (TH) mRNA expression in the female brainstem after coitus, in addition to the appropriate topographic distribution of TH and dopamine-beta-hydroxylase (DBH), lead us to hypothesize that coital signals are relayed to hypothalamic GnRH-secreting neurons via brainstem NE-containing perikarya. Here we analyzed coitally activated areas in the brainstem by in situ hybridization of the oncogene c-fos, as well as the expression of TH mRNA at 0, 30 and 60 min postcoitus using specific S-35-labeled probes for c-fos and TH. To establish the identity of activated brainstem neurons, we immunocytochemically double-labeled cells with specific antibodies against Fos protein and DBH at 90 min postcoitus. Both c-fos and TH mRNAs were present at 0 min (control) in the A1, A2 and A6 brainstem-noradrenergic areas. At 30 min after coitus the expression of both genes significantly increased (P<0.01) in the A1 and A2 areas. By 60 min postcoitus the expression of c-fos mRNA decreased to control levels, while that of TH mRNA remained stimulated. Double-labeling of Fos and DBH indicated that the number of dual-labeled neurons increased (P<0.05) over control levels only in the A1 and A2 areas (not in A6) at 90 min postcoitus. These findings support the hypothesis that coitus activates transcriptional/translational events within brainstem NE neurons that culminate in the release of hypothalamic NE and hence a GnRH surge. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0169-328X UR - ISI:000087514300007 L2 - c-fos;dopamine-beta-hydroxylase;tyrosine hydroxylase;GnRH;coitus;brainstem;GONADOTROPIN-RELEASING-HORMONE; DOPAMINE-BETA-HYDROXYLASE; CENTRAL NERVOUS-SYSTEM; TYROSINE-HYDROXYLASE; NEUROPEPTIDE-Y; NOREPINEPHRINE TRANSPORTER; LUTEINIZING-HORMONE; LOCUS-COERULEUS; FOS EXPRESSION; ESTROUS-CYCLE SO - Molecular Brain Research 2000 ;77(2):222-231 291 UI - 15508 AU - Cabanac M AU - Russek M AD - Univ Laval, Fac Med, Physiol Lab, Quebec City, PQ G1K 7P4, CanadaInst Politecn Nacl, Dept Fisiol, Mexico City 17, DF, MexicoCabanac, M, Univ Laval, Fac Med, Physiol Lab, Quebec City, PQ G1K 7P4, Canada TI - Regulated biological systems AB - Control theory is concerned mainly with the treatment of signals. This article takes into account that living beings not only treat information, but they are open systems traversed by flows of energy and mass. A new block diagram of the regulation process is proposed, taking into account this fundamental difference between engineered and living systems. This new diagram possesses both didactic and heuristic advantages MH - Canada MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 5 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0218-3390 UR - ISI:000088661600002 L2 - regulation;control;feed-back;feed-forward;model;BODY-WEIGHT; SET POINTS; TEMPERATURE SO - Journal of Biological Systems 2000 ;8(2):141-149 292 UI - 14685 AU - Cabello-Pasini A AU - guirre-von-Wobeser E AU - Figueroa FL AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoUniv Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, SpainCabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Photoinhibition of photosynthesis in Macrocystis pyrifera (Phaeophyceae), Chondrus crispus (Rhodophyceae) and Ulva lactuca (Chlorophyceae) in outdoor culture systems AB - The effect of solar radiation on photosynthesis and chlorophyll fluorescence associated to photosystem II (PS II) was determined in the Phaeophyta Macrocystis pyrifera, the Rhodophyta Chondrus crispus and the Chlorophyta Ulva lactuca by oxygen evolution and pulse-amplitude-modulated (PAM) fluorescence. The algae were maintained in 1.2 m(3) outdoor tanks with constant aeration and at 8, 26 and 100% incident irradiance (E-o). All three species showed a decrease in DeltaF/F-m' values during solar noon compared to values in the morning and afternoon, suggesting a photoinhibition of photosynthesis. In general, photoinhibition was negatively correlated to increasing daily irradiance in all three species. Photoinhibition in C. crispus occurred in tissue incubated at 8, 26 and 100% E-o, while in M. pyrifera and U. lactuca a decrease in DeltaF/F-m' values was only observed in tissue incubated at 100% E-o. This suggests that species that naturally grow at greater depths might be more susceptible to excessive light when cultured in shallow waters compared to species that naturally inhabit shallower depths. In M. pyrifera, DeltaF/F-m' values were lower in the afternoon than those in the morning, suggesting slower repair mechanisms of the photosystem II compared to the other species. The results suggest that photoinhibition could be reduced by reducing incident irradiance to culture systems or increasing of biomass to promote self-shading. Gross oxygenic photosynthesis increased linearly at low electron transport rates after which it saturated in all three species. This suggests that chlorophyll fluorescence could be used as an indicator of the physiological status of macroalgae maintained in dense aquaculture systems. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Baja California MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 1011-1344 UR - ISI:000165876900012 L2 - photosynthesis;photoinhibition;photosystem II;pulse-amplitude-modulated fluorescence (PAM);PHOTOSYSTEM-II; FLUORESCENCE MEASUREMENTS; HETEROCAPSA-PYGMAEA; SEASONAL-VARIATIONS; CHARGE SEPARATION; MARINE MACROALGAE; OXYGEN EVOLUTION; SOLAR-RADIATION; CARBON FIXATION; QUANTUM YIELDS SO - Journal of Photochemistry and Photobiology B-Biology 2000 ;57(2-3):169-178 293 UI - 14767 AU - Cabello-Pasini A AU - Smith GJ AU - Alberte RS AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoMoss Landing Marine Labs, Moss Landing, CA 95039, USAPhycoGen Inc, Portland, ME 04101, USACabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Phosphoenolpyruvate carboxykinase from the marine diatom Skeletonema costatum and the phaeophyte Laminaria setchellii. I. Isolation and biochemical characterization AB - Phosphoenolpyruvate carboxykinase (PEPCK) accounts for the bulk of non-photosynthetic carboxylation processes in the marine diatom Skeletonema costatum and the kelp Laminaria setchellii. Activity of the carboxylating enzyme phosphoenolpyruvate carboxylase was undetected in both the diatom and the kelp. The 53-fold purification of diatom PEPCK through gel-filtration and ion-exchange chromatography yielded a 13% recovery of the overall activity. Denaturing gel electrophoresis of diatom PEPCK revealed a single 43 kD polypeptide while the molecular mass of the native PEPCK, determined by gel filtration, was 87 kD indicating that the enzyme exists as a homodimer. These results suggest a structural divergence of diatom PEPCK to the enzyme from yeast and vascular plants, The pH and temperature optimum of PEPCK were identical in both species, however, maximum activity of the enzyme was 7-fold greater in the kelp than in the diatom. The enzyme from both species had an absolute requirement for Mn+2 and ADP, however, the K-m, of PEPCK for HCO3- was 9-fold greater in the diatom than in the kelp, indicating a greater CO2 assimilation efficiency in the macrophyte. These results also indicate an endogenic or regulatory difference among PEPCKs from marine chromophytes MH - Mexico|Baja California MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000165691900007 L2 - ASCOPHYLLUM-NODOSUM PHAEOPHYCEAE; CARBON FIXATION; 3-MERCAPTOPICOLINIC ACID; CHLOROPLAST STROMA; PURIFICATION; CARBOXYLASE; MECHANISM; ASSAY; ALGAE; PHYTOPLANKTON SO - Botanica Marina 2000 ;43(6):559-568 294 UI - 14930 AU - Cabeza JA AU - Noth H AU - Rosales-Hoz MD AU - Sanchez-Cabrera G AD - Univ Oviedo, CSIC, Inst Quim Organometal Enrique Moles, Dept Quim Organ & Inorgan, E-33071 Oviedo, SpainUniv Munich, Inst Anorgan Chem, D-81377 Munich, GermanyInst Politecn Nacl, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoCabeza, JA, Univ Oviedo, CSIC, Inst Quim Organometal Enrique Moles, Dept Quim Organ & Inorgan, E-33071 Oviedo, Spain TI - Reactivity of triosmium carbonyl clusters with 1,8-diaminonaphthalene - Synthesis and structural characterization of amido, diamido, and C-metalated trinuclear derivatives AB - The compounds [OS3(CO)(12)] and [Os-3(mu -H)(2)(CO)(10)] do not react with 1,8-diaminonaphthalene (H(2)dan) under thermal conditions (110 degreesC, 30 min). However, [Os-3(CO)(10)(MeCN)(2)] reacts with H(2)dan (THF, reflux temperature) to give two isomers of [Os-3(mu -H)(mu -Hdan)(CO)(9)] (1 and 2). In toluene at reflux temperature, these reagents afford [Os-3(mu -dan)(CO)(10)] (3). Compound 2 can be converted into 3 under thermal conditions, but no interconversion between 1 and 2 has been observed. The three compounds have been characterized by X-ray diffraction methods. Compound 1 arises from the C-metalation of H(2)dan in a position adjacent to an NH2 group; this generates a hydride and a Ligand that interacts with the three metal atoms through one of the NH2 groups, through the metalated carbon atom (which spans an Os-Os edge), and through one of the C=C bonds of the metalated ring. In compound 2, the hydride arises from the oxidative addition of an N-H bond of H(2)dan; the resulting Ligand interacts with two of the three metal atoms through the amido NH fragment (bridging position) and through the remaining NH2 group. Compound 3 is derived from the transformation of both NH2 groups of H(2)dan into amido NH groups and consists of a 50-electron trinuclear cluster with the longest edge doubly-bridged by both amido groups MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000165166300003 L2 - osmium;amido complexes;cluster compounds;metalation reactions;N ligands;RAY CRYSTAL-STRUCTURE; N-DONOR LIGANDS; RUTHENIUM(I) COMPLEXES; MOLECULAR-STRUCTURE; OS; TRIPHENYLPHOSPHINES; ELECTROPHILES; CHEMISTRY; INSERTION; ANILINES SO - European Journal of Inorganic Chemistry 2000 ;(11):2327-2332 295 UI - 15679 AU - Cabral-Cano E AU - Draper G AU - Lang HR AU - Harrison CGA AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoFlorida Int Univ, Miami, FL 33199, USAJet Propulsion Lab, CALTECH, Pasadena, CA 91109, USAUniv Miami, RSMAS Marine Geology Geophysics, Miami, FL 33149, USACabral-Cano, E, Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Constraining the Late Mesozoic and early tertiary tectonic evolution of southern Mexico: Structure and deformation history of the Tierra Caliente region AB - We analyze the structure and assess the deformation history of the Tierra Caliente Metamorphic Complex (TCMC) of southern Mexico, where Laramide accretion of exotic terranes is in debate. The TCMC consists of a south-plunging antiform fault that is bounded on both its eastern and western flanks. Tierra Caliente Metamorphic Complex rocks show at least two phases of compressional deformation. The first and most prominent records a mean tectonic transport direction of 068 degrees. This phase is responsible for east-verging asymmetrical folding and thrusting of both metamorphic and superjacent sedimentary rocks. The second phase has an average transport direction of 232 degrees and is restricted to the western portion of the TCMC. A third phase is responsible for normal faulting. Lack of discernible deformation before Late Cretaceous time indicates that the main deformation phase is coincident with Laramide orogenesis elsewhere in the North American Cordillera. The stratigraphy, structure, and deformational history of the TCMC do not require accretion of exotic terranes. We explain the Mesozoic tectonostratigraphic evolution of the TCMC in terms of deposition and deformation of Mesozoic volcanic and sedimentary strata over the attenuated continental crust of the North American plate MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Geology U5 - J;Article AV - English IS - 0022-1376 UR - ISI:000088192400004 L2 - TERRANES; AMERICA; GRABEN; BASIN; GULF SO - Journal of Geology 2000 ;108(4):427-446 296 UI - 16283 AU - Cabral-Rosetti LG AU - Bernabeu J AU - Vidal J AU - Zepeda A AD - Univ Valencia, Dept Fis Teor, E-46100 Valencia, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Valencia, CSIC, IFIC, Ctr Mixte, E-46003 Valencia, SpainCabral-Rosetti, LG, Univ Valencia, Dept Fis Teor, E-46100 Valencia, Spain TI - Charge and magnetic moment of the neutrino in the background field method and in the linear R-xi(L) gauge AB - We present a computation of the charge and the magnetic moment of the neutrino in the recently developed electro-weak Background Field Method and in the linear R-xi(L) gauge. First, we deduce a formal Ward-Takahashi identity which implies the immediate cancellation of the neutrino electric charge. This Ward-Takahashi identity is as simple as that for QED. The computation of the (proper and improper) one loop vertex diagrams contributing to the neutrino electric charge is also presented in an arbitrary gauge, checking in this way the Ward-Takahashi identity previously obtained. Finally, the calculation of the magnetic moment of the neutrino, in the minimal extension of the Standard Model with massive Dirac neutrinos, is presented, showing: its gauge parameter and gauge structure independence explicitly MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000086148700007 L2 - ELECTROWEAK STANDARD MODEL; HIGH-ENERGY APPROXIMATION; ONE-LOOP; AMPLITUDES; INTEGRALS SO - European Physical Journal C 2000 ;12(4):633-642 297 UI - 14970 AU - Cabrera G AD - Illinois State Univ, Dept Biol Sci, Normal, IL 61761, USACabrera, G, Prol Zaragoza 205, Jardines de la Hacienda 76180, Queretaro, Mexico TI - Effect of five dietary antimutagens on the genotoxicity of six mutagens in the Microscreen prophage-induction assay AB - Dietary antimutagens have been studied sively in the last two decades, using mainly bacterial and mammalian cells. These studies have shown that certain dietary antimutagens, acting individually or as mixtures, are useful in counteracting the effects of certain mutagens and/or carcinogens to which humans are commonly exposed. However, there are some inconsistencies among publications using different bioassays. The general purpose of the research presented here was to conduct a comparative study of the antigenotoxic activity of five dietary antimutagens against six mutagens, using three rather different short-term tests: the Microscreen prophage-induction assay, the Tradescantia micronucleus test, and the Salmonella/mammalian microsome test. In this study report the results with the Microscreen prophageinduction assay. The antimutagens selected were chlorophyllin, beta -carotene, and vitamins A, C, and E. The mutagens selected were 2-aminoanthracene, benzo[a]pyrene, 2-nitrofluorene, toxaphene, dichlorvos, and nitrofen. The results show that chlorophyllin and beta -carotene inhibited the genotoxicity of all six mutagens; vitamin E inhibited all except dichlorvos; and vitamins C and A inhibited 2-aminoanthracene, benzo[a]pyrene, 2-nitrofluorene, and nitrofen. (C) 2000 Wiley-Liss, Inc MH - Mexico|Queretaro MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0893-6692 UR - ISI:000165059600004 L2 - short-term tests;Microscreen prophage-induction assay;dietary antimutagens;genotoxicity;antigenotoxic activity;CANCER CHEMOPREVENTIVE AGENTS; SALMONELLA-TYPHIMURIUM; ESCHERICHIA-COLI; LAMBDA-PROPHAGE; IN-VITRO; CHLOROPHYLLIN; CARCINOGENS; MECHANISMS; PROFILES; ANTICARCINOGENICITY SO - Environmental and Molecular Mutagenesis 2000 ;36(3):206-220 298 UI - 16642 AU - Cabrera MEM AU - Hernandez HH AU - Peraza EH AU - Martinez NR AU - Reyes MCL AD - Inst Super Ciencias & Tecnol Nucl, La Habana 10600, CubaCtr Invest Mat Avanzados SC, Chihuahua 31109, MexicoEmpresa Nacl Geofis, Habana 10400, CubaInst Nacl Invest Nucl, Ocoyoacac, Mexico, MexicoCabrera, MEM, Inst Super Ciencias & Tecnol Nucl, Ave Salvador Allende & Luaces,Plaza Revoluc, La Habana 10600, Cuba TI - Instrumental neutron activation analysis of rocks from Cayajabos petroleum ore AB - The relative INAA method under statistical control was used to measure the concentrations of Sb, La, Eu, Co, Rb, Tb, Cs, Hf, Th, Cr, Lu, Yb, Ce, Sm, Gd, Nd. Rare earth element (REE) Chondrite-normalized patterns are presented. The La-cond/Lu-cond normalized concentration ratios obtained confirm the carbonaceous character of the rocks. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Chihuahua MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000084820400019 L2 - INAA;lanthanides;petroleum ores SO - Applied Radiation and Isotopes 2000 ;52(1):143-146 299 UI - 16378 AU - Cabrit S AU - Raga A AD - Observ Paris, DEMIRM, CNRS, UMR 8540, F-75014 Paris, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoCabrit, S, Observ Paris, DEMIRM, CNRS, UMR 8540, 61 Ave Observ, F-75014 Paris, France TI - Theoretical interpretation of the apparent deceleration in the HH 34 superjet AB - The HH 34 superjet shows a steep velocity decrease (from similar to 500 to similar to 100 km s(-1)) over a distance of similar to 2 pc on either side of the central source. We explore whether or not this behaviour could be interpreted as evidence for a slow "turning on" of the ejection velocity of the jet, and find that this is indeed possible, but only for an ejection velocity that has had a dramatic growth over the last similar to 10(4) yr, and is just about to stabilize within the next 4000 yr. We argue that such a time-variability is somewhat unlikely. We then explore a second scenario, in which the slowing down of the HH 34 superjet is modeled as the result of the interaction of a fragmented jet with the surrounding environment. We find that for parameters appropriate for I-II-I 34, this model does appear to reproduce the observed slowing down of the superjet in a natural way. We therefore conclude that the kinematical properties of the HH 34 superjet are most likely to be the result of environmental drag on the propagation of individual jet knots, resulting from the fragmentation of a time-variable, precessing jet MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000085921500032 L2 - ISM : jets and outflows;ISM : individual objects : HH 34;hydrodynamics;stars : formation;TIME-DEPENDENT SOURCES; STELLAR JETS; MOLECULAR OUTFLOW; SIMULATION; MODEL SO - Astronomy and Astrophysics 2000 ;354(2):667-673 300 UI - 14150 AU - Caffesse RG AU - De LaRosa M AU - Garza M AU - Munne-Travers A AU - Mondragon JC AU - Weltman R AD - Univ Texas Houston, Hlth Sci Ctr, Dent Branch, Houston, TX 77030, USAUniv Autonoma De Nuevo Leon, Monterrey, MexicoCaffesse, RG, Univ Texas Houston, Hlth Sci Ctr, Dent Branch, 6516 John Freeman Ave,Room 309, Houston, TX 77030 USA TI - Citric acid demineralization and subepithelial connective tissue grafts AB - Background: The present study was designed to evaluate the effect, if any, of citric acid root demineralization in the outcome of subepithelial connective tissue grafts performed to cover localized gingival recessions. Methods: Thirty-six patients participated, each providing one gingival recession; 19 received citric acid demineralization, while 17 did not. All were treated surgically with subepithelial connective tissue grafts and followed for 6 months. At baseline and 6 months, the following parameters were recorded: plaque index, gingival index, recession height, probing depth, recession width, and amount of keratinized tissue. Data were analyzed statistically to 1) evaluate the results achieved with each procedure individually over time and 2) compare the results obtained with the 2 procedures after 6 months. Results: Results showed significant reductions in recession height after 6 months independently of whether citric acid was applied or not (2.19 +/- 0.79 versus 2.56 +/- 0.73). Similarly, recession width was significantly reduced (3.74 +/- 1.19 versus 3.50 +/- 0.73), and the width of keratinized tissue was significantly increased (2.47 +/- 1.6 versus 2.3 +/- 1.2). No significant changes in probing depth were found (-0.16 +/- 0.06 versus -0.13 +/- 0.81). No significant differences were found when both techniques were compared in any one of the parameters analyzed tall P >0.30). Conclusions: It is concluded that: 1) the supepithelial connective tissue graft procedure provides a satisfactory solution in the treatment of localized gingival recessions, and 2) citric acid demineralization does not affect the clinical outcome of the surgical technique MH - Mexico|Nuevo Leon MH - USA PB - CHICAGO: AMER ACAD PERIODONTOLOGY RP - NOT IN FILE U3 - TC 14 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-3492 UR - ISI:000167489200008 L2 - citric acid, therapeutic use;tooth root;tooth demineralization;gingival recession, therapy;gingival recession, surgery;grafts, connective tissue;comparison studies;ROOT COVERAGE; GINGIVAL RECESSIONS; DIMENSIONS; SURFACES SO - Journal of Periodontology 2000 ;71(4):568-572 301 UI - 16436 AU - Cai L AU - Struk B AU - Adams MD AU - Ji W AU - Haaf T AU - Kang HL AU - Dho SH AU - Xu XQ AU - Ringpfeil F AU - Nancarrow J AU - Zach S AU - Schaen L AU - Stumm M AU - Niu TH AU - Chung J AU - Lunze K AU - Verrecchia B AU - Goldsmith LA AU - Viljoen D AU - Figuera LE AU - Fuchs W AU - Lebwohl M AU - Uitto J AU - Richards R AU - Hohl D AU - Ramesar R AU - Callen DF AU - Kim UJ AU - Doggett NA AU - Neldner KH AU - Lindpainter K AD - Brigham & Womens Hosp, Childrens Hosp, Dept Cardiol,Cardiovasc Div, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Cardiol, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Med, Boston, MA 02115, USATexas Tech Univ, Hlth Sci Ctr, Dept Dermatol, Lubbock, TX 79430, USAInst Genom Res, Rockville, MD 20850, USACALTECH, Div Biol, Caltech Genome Res Lab, Pasadena, CA 91125, USAUniv Calif Los Alamos Natl Lab, Div Life Sci, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, Ctr Human Genome Studies, Los Alamos, NM 87545, USAWomens & Childrens Hosp, Dept Cytogenet & Mol Genet, Adelaide, SA 5006, AustraliaThomas Jefferson Univ, Jefferson Med Coll, Dept Dermatol & Cutaneous Biol, Philadelphia, PA 19107, USACUNY Mt Sinai Sch Med, Dept Dermatol, New York, NY 10029, USAUniv Cape Town, Sch Med, Dept Human Genet, ZA-7925 Cape Town, South AfricaCUNY Mt Sinai Sch Med, Dept Ophthalmol, New York, NY 10029, USAUniv Lausanne, Dept Dermatol, CH-1011 Lausanne, SwitzerlandUniv Rochester, Dept Dermatol, Rochester, NY 14642, USAUniv Guadalajara, Sch Med, CIBO IMSS, Div Genet, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Sch Med, CIBO IMSS, Dept Mol Med, Guadalajara 44430, Jalisco, MexicoS African Inst Med Res, Johannesburg, South AfricaMax Planck Inst Mol Genet, Berlin, GermanyOtto Von Guericke Univ, Inst Human Genet, Magdeburg, GermanyCelera Genom, Rockville, MD 20850, USAMax Delbruck Ctr Mol Med, D-13122 Berlin, GermanyF Hoffmann La Roche Ltd, Roche Genet, Div Pharmaceut, CH-4070 Basel, SwitzerlandLindpainter, K, Brigham & Womens Hosp, Childrens Hosp, Dept Cardiol,Cardiovasc Div, 75 Francis St, Boston, MA 02115 USA TI - A 500-kb region on chromosome 16p13.1 contains the pseudoxanthoma elasticum locus: high-resolution mapping and genomic structure AB - We have recently mapped the genetic defect underlying pseudoxanthoma elasticum (PXE), an inherited disorder characterized by progressive calcification of elastic fibers in skin, eye, and cardiovascular system, to chromosome 16p13.1. Here we report further data on the fine-mapping and genomic structure of this locus. Haplotype analysis of informative PXE families narrowed the locus to an interval of less than 500 kb located between markers D16B9621 and D16S764. Three overlapping YAC clones were found to cover this region through YAC-STS content mapping. An overlapping BAC contig was then constructed to cover this interval and the surrounding region. About 80% of this chromosomal region has been fully sequenced using the BAC shotgun technique. Gene content and sequence analysis predicted four genes (MRP1, MRP6, PM5, and a novel transcript) and two pseudogenes (ARA and PKD1) within this interval. By screening a somatic cell hybrid panel we were able to precision-map the breakpoint of Cy185 and the starting point of a chromosomal duplication within 20 kb of BAC A962B4. The present data further refine the localization of PXE, provide additional physical cloning resources, and will aid in the eventual identification of the genetic defect causing PXE MH - Australia MH - Germany MH - USA MH - Mexico|Jalisco MH - South Africa MH - Switzerland PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 35 U4 - Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0946-2716 UR - ISI:000085637800005 L2 - pseudoxanthoma elasticum;genetic mapping;physical mapping;BAC contigs;YAC contigs;RESISTANCE-ASSOCIATED PROTEIN; LEUKEMIA-CELL LINE; MULTIDRUG-RESISTANCE; EXPORT PUMP; LEUKOTRIENE C-4; PHYSICAL MAP; TUMOR-CELLS; GENE; MRP; GLUTATHIONE SO - Journal of Molecular Medicine-Jmm 2000 ;78(1):36-46 302 UI - 15087 AU - Cairns MA AU - Haggerty PK AU - Alvarez R AU - de Jong BHJ AU - Olmsted I AD - US EPA, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, Corvallis, OR 97333, USAOAO Corp, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, US EPA, Corvallis, OR 97333, USAUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 01000, DF, MexicoEl Colegio Frontera Sur, Div Sistemas Prod Alternat, San Cristobal De Las Cas 29200, Chiapas, MexicoCtr Invest Cient Yucatan, Dept Recursos Nat, Cordemex 97310, Yucatan, MexicoCairns, MA, US EPA, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, 200 SW 35th St, Corvallis, OR 97333 USA TI - Tropical Mexico's recent land-use change: A region's contribution to the global carbon cycle AB - We applied modeled biomass density estimates to changes in land use/land cover (LU/LC) statistics for the intensively impacted and highly fragmented landscape of tropical Mexico to estimate the flux of carbon (C) between terrestrial ecosystems and the atmosphere between 1977 and 1992. Biomass densities were assigned to hybrid LU/LC classes on vegetation maps produced by Mexican governmental organizations and, by differencing areas and biomass C pools, net C flux was calculated in the eight-state tropical region of southeast Mexico. These states, representing tropical Mexico, experienced a mean annual deforestation rate of nearly 559 000 ha/yr, or 1.9%, between 1977 and 1992. The total area of closed forests decreased by 26%, open/fragmented forests decreased by 31%, and agroecosystem areas increased by 64%. Total mean biomass densities ranged from a high of 265 Mg/ha in the Veracruz state tall/medium tropical evergreen forest class to a low of 12 Mg/ha in the cultivated land class (several states). We estimate that a total of 280 Tg C were released from the terrestrial biosphere during the 15-yr period covered by our study, equal to nearly 20% of the region's 1977 biomass C pool. The study region, while comprising just 24% of Mexico's surface area, contributed 36% of the net national C emissions from LU/LC change MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 17 U4 - Ecology;Environmental Sciences U5 - J;Review AV - English IS - 1051-0761 UR - ISI:000089744800018 L2 - agricultural expansion;carbon flux;deforestation in tropical Mexico;forests;decline in area;global carbon cycle;greenhouse gases;land cover and global C cycle;land-use changes;Mexico tropical;SOIL ORGANIC-MATTER; BRAZILIAN AMAZON; TERRESTRIAL ECOSYSTEMS; SECONDARY FORESTS; EASTERN AMAZONIA; SOUTHEAST-ASIA; DEGRADED LANDS; LATIN-AMERICA; ROOT BIOMASS; COVER CHANGE SO - Ecological Applications 2000 ;10(5):1426-1441 303 UI - 16458 AU - Calambokidis J AU - Steiger GH AU - Rasmussen K AU - Urban J AU - Balcomb KC AU - de Guevara PL AU - Salinas M AU - Jacobsen JK AU - Baker CS AU - Herman LM AU - Cerchio S AU - Darling JD AD - Cascadia Res Collect, Olympia, WA 98501, USAUniv Autonoma Baja California, Dept Biol Marina, Mexicali 23081, Baja California, MexicoCtr Whale Res, Friday Harbor, WA 98250, USAUniv Nacl Autonoma Mexico, Lab Mamiferos Marinos, Mexico City 04510, DF, MexicoUniv Hawaii, Kewalo Basin Marine Mammal Lab, Honolulu, HI 96814, USAMoss Landing Marine Labs, Moss Landing, CA 95039, USACalambokidis, J, Cascadia Res Collect, Waterst Bldg, 218 1 2 W 4th Ave, Olympia, WA 98501 USA TI - Migratory destinations of humpback whales that feed off California, Oregon and Washington AB - The migratory destinations of humpback whales that feed off California, Oregon and Washington were determined using photo-identification. Fluke photographs of 594 individuals were taken between 1981 and 1992 and compared to collections from 9 wintering regions in the North Pacific: Ogasawara (162) and Okinawa (17) islands of Japan; the Big Island and Maul (634 for both) and Kauai (384) of Hawaii; the Revillagigedo Archipelago (450), the mainland coast (383) and Baja Peninsula (471) of Mexico; and Central America (31). A total of 160 matches were found to 6 central and eastern North Pacific wintering regions, with most from Central America, Baja, and mainland Mexico. Of whales identified off Central America, 84% were resighted off California-Washington; this high rate of interchange suggests that whales in these tropical waters appear to be comprised entirely of animals from the California-Washington feeding aggregation. Humpback whales seen off Central America were resighted disproportionately off southern California while those from mainland Mexico tended to be seen off northern California-Washington. From 157 same-season migratory transits documented, the shortest were 29 d to Baja and 56 d to Costa Rica and the longest distance was 5322 km. Of the California-Washington whales with known sex, the proportion of males identified at a wintering region was significantly higher than females (2.2:1, p < 0.05) MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 12 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000085578000026 L2 - humpback whales;migration;photo-identification;North Pacific;MEGAPTERA-NOVAEANGLIAE; NORTH PACIFIC; POPULATION COMPOSITION; COMPETITIVE GROUPS; MEXICAN PACIFIC; WEST-INDIES; COSTA-RICA; SAMANA BAY; MOVEMENT; NUCLEAR SO - Marine Ecology-Progress Series 2000 ;192():295-304 304 UI - 15404 AU - Calaminici P AU - Koster AM AU - Vela A AU - Jug K AD - CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoUniv Hannover, D-31067 Hannover, GermanyCalaminici, P, CINVESTAV, Dept Quim, Av Inst Politecn Nacl 2508,AP 14-470, Mexico City 07000, DF, Mexico TI - Comparison of static polarizabilities of Cu-n, Na-n, and Li-n (n <= 9) clusters AB - This paper presents the first study of static polarizabilities and polarizability anisotropies of copper clusters up to nine atoms calculated in the framework of density functional theory. The calculations were of all-electron type and have been performed by using a finite field approach implemented in the density functional program A LLCHEM. A newly developed first-order field induced copper basis set for density functional calculation was employed. A gradient-corrected exchange-correlation functional has been used. All cluster structures were fully optimized. The calculated polarizabilities of copper clusters are compared with experimental polarizabilities of sodium and lithium clusters. This comparison shows that the size dependency of the static polarizabilities per atom of copper clusters posseses the same trend as that observed in sodium clusters. However, the absolute polarizabilities of the copper clusters are considerably smaller as those of the sodium clusters. (C) 2000 American Institute of Physics. [S0021- 9606(00)31130-8] MH - Germany MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 25 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000088786900020 L2 - DENSITY-FUNCTIONAL CALCULATIONS; MOLECULAR ELECTRIC PROPERTIES; NONLINEAR-OPTICAL-PROPERTIES; POLARIZED BASIS-SETS; DIPOLE POLARIZABILITIES; HYPERPOLARIZABILITIES; 2ND-ORDER; MOMENTS; APPROXIMATION; OPTIMIZATION SO - Journal of Chemical Physics 2000 ;113(6):2199-2202 305 UI - 16233 AU - Calaminici P AU - Jug K AU - Koster AM AU - Ingamells VE AU - Papadopoulos MG AD - Univ Hannover, D-30167 Hannover, GermanyNatl Hellen Res Fdn, Inst Organ & Pharmaceut Chem, Athens 11635, GreeceCalaminici, P, CINVESTAV, Dept Quim, Mexico City 7000, DF, Mexico TI - Polarizabilities of azabenzenes AB - This paper presents static polarizabilities, polarizability anisotropies, second hyperpolarizabilities, and an analysis of the vibrational effects for these polarizabilities of azabenzenes calculated in the framework of density functional theory. All molecular geometries were fully optimized. The calculations of the polarizabilities and second hyperpolarizabilities have been performed using a finite field approach implemented in the density functional program ALLCHEM. The calculations were of all- electron type using a local exchange-correlation functional. The calculated polarizabilities are in excellent quantitative agreement with available experimental data. The effect of the replacement of CH groups by N atoms is discussed. (C) 2000 American Institute of Physics. [S0021-9606(00)01713-X] MH - Germany MH - Greece MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 19 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000086231600023 L2 - DENSITY-FUNCTIONAL THEORY; EFFICIENT RECURSIVE COMPUTATION; MOLECULAR ELECTRIC PROPERTIES; NONLINEAR-OPTICAL-PROPERTIES; CARTESIAN GAUSSIAN FUNCTIONS; POLARIZED BASIS-SETS; DIPOLE POLARIZABILITIES; GAS-PHASE; FIELD CALCULATIONS; S-TETRAZINE SO - Journal of Chemical Physics 2000 ;112(14):6301-6308 306 UI - 16245 AU - Calderini DF AU - Reynolds MP AD - CIMMYT, Mexico City 06600, DF, MexicoCalderini, DF, Univ Buenos Aires, Fac Agron, Dept Prod, Av San Martin 4453, RA-1417 Buenos Aires, DF, Argentina TI - Changes in grain weight as a consequence of de-graining treatments at pre- and post-anthesis in synthetic hexaploid lines of wheat (Triticum durum x T-tauschii) AB - Grain weight is a trait which has hardly been exploited for raising genetic yield potential of wheat. A clearer understanding of physiological determinants of grain weight potential would be useful in establishing the potential value of this trait in future breeding programs. The objective of this study was to improve understanding of how intra-spikelet competition for assimilates pre- and post-anthesis affect grain weight potential, and to evaluate possible mechanisms determining final grain weight in wheat. Two experiments were carried out under field conditions. Proximal or distal grains from the two central spikelets of spikes of three synthetic hexaploid lines were detached at heading or 7 d after anthesis. Synthetic wheats were used since they represent a potential source of genetic variability for grain weight potential. Carpel size at anthesis and grain weight during the grain filling period were measured. The de-graining treatment at heading significantly increased grain weight, especially in distal positions. On the contrary, the de-graining treatment carried out after anthesis caused no increase in final grain weight. The largest response to pre- anthesis de-graining occurred in grain positions with the lowest grain mass. In addition, the effect of de-graining prior to anthesis was associated hyperbolically with weight of carpels at anthesis within each grain position. Therefore, carpel weight at anthesis could be partially associated with the regulation of grain weight potential MH - Argentina MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 20 U4 - Plant Sciences U5 - J;Article AV - English IS - 0310-7841 UR - ISI:000086246200001 L2 - grain detachment;grain weight;source-sink;synthetic hexaploids;wheat;yield potential;AESTIVUM L; KERNEL DEVELOPMENT; FLORET DEVELOPMENT; ISOGENIC LINES; GROWTH; NUMBER; SPIKE; TEMPERATURE; DURATION; CULTIVARS SO - Australian Journal of Plant Physiology 2000 ;27(3):183-191 307 UI - 14777 AU - Calderon-Garciduenas L AU - Devlin RB AU - Miller FJ AD - US EPA, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAUniv N Carolina, Curriculum Toxicol, Chapel Hill, NC, USAInst Nacl Pediat, Mexico City, DF, MexicoChem Ind Inst Toxicol, Res Triangle Pk, NC 27709, USAMiller, FJ, US EPA, Natl Hlth & Environm Effects Res Lab, 58D, Res Triangle Pk, NC 27711 USA TI - Respiratory tract pathology and cytokine imbalance in clinically healthy children chronically and sequentially exposed to air pollutants AB - Chronic exposure of children to a complex mixture of air pollutants leads to recurrent episodes of upper and lower respiratory tract injury. An altered nasal mucociliary apparatus leaves the distal acinar airways more vulnerable to reactive gases and particulate matter. The heterogeneity of structure in the human lung can impart significant variability in the distribution of ozone dose and particle deposition; this, in turn, influences the extent of epithelial injury and repair in chronically exposed children, Cytokines are low-molecular-weight proteins that act as intercellular mediators in inflammatory reactions, including lung injury of various etiologies. Cytokines are involved in generating inflammatory responses that contribute to injury at the lung epithelial and endothelial barriers. Mexico City is a 20-million-person megacity with severe air pollution problems. Southwest Metropolitan Mexico City (SWMMC) atmosphere is characterized by a complex mixture of air pollutants, including ozone, particulate matter (PM), and aldehydes, There is radiological evidence that significant lower respiratory tract damage is taking place in clinically healthy children chronically and sequentially exposed to air pollutants while growing up in SWMMC. We hypothesize that there is an imbalanced and dysregulated cytokine network in SWMMC children with overproduction of proinflammatory cytokines and cytokines involved in lung tissue repair and fibrosis. The nature of the sustained imbalance among the different cytokines ultimately determines the final lung histopathology, which would include subchronic inflammation, emphysema, and fibrosis, Cytokines likely reach the systemic circulation and produce systemic effects, Individuals with an underlying respiratory or cardiovascular disease are less able to maintain equilibrium of the precarious cytokine networks, 2000 Harcourt Publishers Ltd MH - Mexico|Distrito Federal MH - USA PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 3 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0306-9877 UR - ISI:000165610500002 L2 - TNF-ALPHA PRODUCTION; MEXICO-CITY; ALVEOLAR MACROPHAGES; INHALABLE PARTICLES; EPITHELIAL-CELLS; VENTILATORY UNIT; URBAN POLLUTION; OZONE EXPOSURE; GROWTH-FACTOR; RAT LUNG SO - Medical Hypotheses 2000 ;55(5):373-378 308 UI - 15774 AU - Calderon-Garciduenas L AU - Mora-Tiscareno A AU - Chung CJ AU - Valencia G AU - Fordham LA AU - Garcia R AU - Osnaya N AU - Romero L AU - Acuna H AU - Villarreal-Calderon A AU - Devlin RB AU - Koren HS AD - Univ N Carolina, Dept Radiol, Chapel Hill, NC, USAInst Nacl Pediat, Mexico City, DF, MexicoCalderon-Garciduenas, L, US EPA, MD 58D, Res Triangle Pk, NC 27711, USA TI - Exposure to air pollution is associated with lung hyperinflation in healthy children and adolescents in Southwest Mexico City: A pilot study AB - Air pollution produces adverse health effects. The consequences of lifelong daily exposures to atmospheric pollutants upon the respiratory apparatus of healthy children are of considerable clinical importance. We investigated the association between exposure to a highly polluted urban environment with a complex mixture of air pollutants-ozone and particulate matter the predominant ones-and chest x-ray abnormalities in 59 healthy Mexican children who are lifelong residents of Southwest Metropolitan Mexico City (SWMMC), with a negative history of tobacco exposure and respiratory illnesses. Their clinical results and x-ray findings were compared to those of 19 Mexican control children. residents of a low-pollution area, with a similar negative history of tobacco exposure and respiratory illnesses. Ozone concentrations in SWMMC exceeded the U.S. Environmental Protection Agency (U.S. EPA) National Ambient Air Quality Standard (NAAQS) for O-3: 0.08 ppm as 1-h maximal concentration, not to be Exceeded more than 4 times a year, on 71% of days in 1986 and 95% in 1997, with values as high as 0.48 ppm. Ozone maximal peaks are usually recorded between 2 and 5 pm coinciding with children's outdoor physical activities. Children in the control group reported no upper or lower respiratory symptomatology. Every SWMMC child complained of upper and/or lower respiratory symptoms, including epistaxis, nasal dryness and crusting, cough, shortness of breath, and chest discomfort Children aged 7-13 yr had the most symptomatology, while 5- to 6-year olds and adolescents with the lowest number of statistically significant outdoor exposure hours had less respiratory symptoms. Bilateral symmetric mild lung hyperinflation was significantly associated with exposure to the SWMMC atmosphere (p = .0004). Chronic and sustained inhalation of a complex mixture of air pollutants, including ozone and particulate matter (PM), is associated with lung hyperinflation, suggestive of small airway disease, in a population of clinically healthy children and adolescents. Small airways are a target of air pollutants in SWMMC children, with ozone and PM being most likely responsible, based on experimental animal, controlled-chamber, and epidemiological data available. Our main concern is the potential likelihood for the development of chronic lung disease in this highly exposed population MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 12 U4 - Toxicology U5 - J;Article AV - English IS - 0895-8378 UR - ISI:000087844800005 L2 - LOWER RESPIRATORY-INFECTIONS; CYSTIC-FIBROSIS; INHALABLE PARTICLES; PULMONARY-FUNCTION; METROPOLITAN-AREA; CHEST RADIOGRAPH; OZONE ABSORPTION; INFANT-MORTALITY; PARTICULATE; DISEASE SO - Inhalation Toxicology 2000 ;12(6):537-561 309 UI - 16119 AU - Calderon-Garciduenas L AU - Rodriguez-Alcaraz A AU - Mora-Tascareno A AU - Garcia R AU - Osnaya N AU - Villarreal-Calderon A AU - Carson J AU - Devlin RB AU - Van Dyke T AD - Univ N Carolina, Curriculum Toxicol, Chapel Hill, NC, USAInst Nacl Pediat, Mexico City, DF, MexicoSoc Mex ORL & CCC, Mexico City, DF, MexicoUNC, Dept Pediat, Chapel Hill, NC, USAUS EPA, Res Triangle Pk, NC 27711, USAUNC, Dept Biochem Biophys, Chapel Hill, NC, USA TI - p53 in nasal biopsies of children chronically and sequentially exposed to air pollutants MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918101001 SO - Faseb Journal 2000 ;14(4):A173-A173 310 UI - 16192 AU - Calderon-Garciduenas L AU - Delgado R AU - Calderon-Garciduenas A AU - Meneses A AU - Ruiz LM AU - de la Garza J AU - Acuna H AU - Villarreal-Calderon A AU - Raab-Traub N AU - Devlin R AD - Univ N Carolina, Curriculum Toxicol, Chapel Hill, NC, USAInst Nacl Pediat, Mexico City, DF, MexicoInst Nacl Cancerol, Mexico City, DF, MexicoHosp Especialidades 25, Ctr Med Noreste, Inst Mexicano Seguro Social, Monterrey, MexicoUniv N Carolina, Lineberger Comprehens Canc Ctr, Dept Microbiol & Immunol, Chapel Hill, NC 27599, USAUniv N Carolina, US EPA, Human Studies Div, Chapel Hill, NC, USACalderon-Garciduenas, L, US EPA, MD 58D, Res Triangle Pk, NC 27711, USA TI - Malignant neoplasms of the nasal cavity and paranasal sinuses: A series of 256 patients in Mexico City and Monterrey. Is air pollution the missing link? AB - Air pollution is a serious health problem in major cities in Mexico. The concentrations of monitored criteria pollutants have been above the US National Ambient Air Quality Standards for the last decade. To determine whether the number of primary malignant nasal and paranasal neoplasms has increased, we surveyed 256 such cases admitted to a major adult oncology hospital located in metropolitan Mexico City (MMC) for the period from 1976-1997 and to a tertiary hospital in Monterrey, an industrial city, for the period from 1993-1998. The clinical histories and histopathologic material were reviewed, and a brief clinical summary was written for each case. In the MMC hospital the number of newly diagnosed nasal and paranasal neoplasms per year for the period from 1976-1986 averaged 5.1, whereas for the next 11 years it increased to 12.5. The maximal increase was observed in 1995-1997, with an average of 20.3 new cases per year (P = 0.0006). The predominant neoplasms in these series were non-Hodgkin's lymphoma, squamous cell carcinoma, melanoma, adenocarcinoma, Schneiderian carcinoma, and nasopharyngeal carcinoma. In the Monterrey hospital a 2-fold increase in the numbers of newly diagnosed nasal and paranasal neoplasms was recorded between 1993 and 1998. The predominant MMC neoplasm in this series, namely nasal T-cell/natural killer cell non-Hodgkin's lymphoma, is potentially Epstein-Barr virus related. Nasal and paranasal malignant neoplasms are generally rare. Environmental causative factors include exposure in industries such as nickel refining, leather, and wood furniture manufacturing. Although epidemiologic studies have not addressed the relationship between outdoor air pollution and sinonasal malignant neoplasms, there is strong evidence for the nasal and paranasal carcinogenic effect of occupational aerosol complex chemical mixtures. General practitioners and ear, nose, and throat physicians working in highly polluted cities should be aware of the clinical presentations of these patients. Identification of this apparent increase in sinonasal malignant neoplasms in two urban Mexican polluted cities warrants further mechanistic and epidemiologic studies MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - ST LOUIS: MOSBY-YEAR BOOK INC RP - NOT IN FILE U3 - TC 12 U4 - Otorhinolaryngology;Surgery U5 - J;Article AV - English IS - 0194-5998 UR - ISI:000086420600006 L2 - NON-HODGKINS-LYMPHOMA; EPSTEIN-BARR-VIRUS; KILLER-CELL LYMPHOMAS; NASOPHARYNGEAL CARCINOMA; RISK-FACTORS; OCCUPATIONAL EXPOSURE; SINONASAL CANCER; MUCOSAL MELANOMAS; URBAN POLLUTION; WOOD DUST SO - Otolaryngology-Head and Neck Surgery 2000 ;122(4):499-508 311 UI - 15296 AU - Calixto ME AU - McClure JC AU - Singh VP AU - Bronson A AU - Sebastian PJ AU - Mathew X AD - Univ Texas, Dept Met & Mat Engn, El Paso, TX 79968, USAUNAM, CIE, Temixco 62580, Morelos, MexicoUniv Texas, Dept Elect Engn, El Paso, TX 79968, USAMcClure, JC, Univ Texas, Dept Met & Mat Engn, El Paso, TX 79968, USA TI - Electrodeposition and characterization of CdTe thin films on Mo foils using a two voltage technique AB - Polycrystalline thin film CdTe-based solar cells are one of the most promising candidates for low-cost terrestrial conversion of solar energy because of the optimum energy band gap (E-g = 1.44 eV) and high absorption coefficient of CdTe. In this work, a two-step electrodeposition technique has been used to prepare CdTe thin films from acidic solutions. In the first step, a thin Te rich CdTe layer was deposited at -300 mV (SCE) on a Mo foil substrate. On top of this film, a Cd rich CdTe layer was deposited at more negative voltages. The resulting films showed good adherence to the substrate and very low contact resistance between the substrate and the p + Te rich CdTe layer. The composite film was of nearly stoichiometric composition. From X-ray diffraction results, the as-deposited films show very small grain sizes but after annealing the grain size increases considerably showing very well-defined peaks. The morphological, structural and composition results of CdTe thin films obtained by Scanning Electron microscopy, X-ray diffraction, and X-ray fluorescence will be presented. Electrical properties such as conductivity type and contact resistance values for the Mo/CdTe structures will also be presented. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000089095600004 L2 - cadmium teluride;CdTe;thin films;electrodeposition;solar cells;DEPOSITION; CADMIUM; CELLS SO - Solar Energy Materials and Solar Cells 2000 ;63(4):325-334 312 UI - 14599 AU - Calme S AU - Desrochers A AD - Univ Laval, Fac Foresterie & Geomat, Ctr Rech Biol Forestiere, Quebec City, PQ G1K 7P4, CanadaCalme, S, Colegio Frontera Sur, Div Conservac Biodivers, Apartado Postal 424, Chetumal 77000, Quintana Roo, Mexico TI - Biogeographic aspects of the distribution of bird species breeding in Quebec's peatlands AB - Aim The state of peatlands in eastern Canada is of growing concern. This habitat is in decline due tu urban sprawl, agriculture, forestry, and peat mining. Moreover reduction and fragmentation have led to increasing isolation of remaining peatlands. We determined how bird species distribution in peatlands conforms to expectations drawn from island dynamics. We also determined the factors influencing the occurrence of 10 common peatland bird species, two of which rely mainly on peatlands for nesting in the study region. Location We sampled sixty-three peatlands in southern Quebec, Canada, within a landscape characterized by a mosaic of forest stands and farmland. Methods We sampled nesting bird populations within peatlands from 4 June to 14 July 1995, using both transect lines and fixed-radius point counts. Each sampled peatland was characterized by area, vegetation structure (microhabitats), and isolation. We used multiple regression to test the relationship between bird species richness, peatland area, heterogeneity, microhabitat richness, and relative isolation, after correction for sampling effort. Relationships between bird species abundances and the variables the environmental variables were investigated with Canonical Correspondence Analyses. We calculated probabilities of occurrence of individual species in peatlands by logistic regression, with the same explanatory variables as mentioned previously. Results Bird species richness was mainly explained by microhabitat richness, and to a lesser extent, by sampling effort. By contrast, the occurrence of more than half of the species was mainly explained by peatland microhabitat heterogeneity. Palm warbler Dendroica palmarum (Gmelin) and upland sandpipers Bartramia longicauda (Bechstein) were the only species less frequent in small and isolated peatlands than in other peatlands. Main conclusions The results for species richness support both the habitat diversity, and passive sampling hypotheses for patchy distribution of birds. By contrast, results from individual species emphasized the difference between factors affecting total species richness and individual species distribution. The distribution of palm warbler, the only species restricted to peatlands regionally, was consistent with expectations from island dynamics MH - Canada MH - Mexico|Quintana Roo PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0305-0270 UR - ISI:000166179900012 L2 - wetland;peatland;habitat heterogeneity;isolation;passive sampling;biogeography;bird;palm warbler;HABITAT; AREA SO - Journal of Biogeography 2000 ;27(3):725-732 313 UI - 15351 AU - Calogero F AU - Leyvraz F AD - Univ Mexico, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoUniv Rome La Sapienza, Dipartimento Fis, I-00185 Rome, ItalyIst Nazl Fis Nucl, Sez Roma, Rome, ItalyCalogero, F, Univ Mexico, Ctr Ciencias Fis, Av Univ S-N, Cuernavaca, Morelos, Mexico TI - New results on a parity-dependent model of aggregation kinetics AB - A reaction kernel, K(j,k) = K(k,j), is studied, for which the Smoluchowski equations of aggregation (c)over dot = 1/2 Sigma(k,l=1)(infinity) K(k,l)c(k)c(l)[delta(k+l,j) - delta(k,j) -delta(l,j)] can be solved. It takes only three values: K(j, k) = K if j and k are both odd, K(j, k) = L if j and k are both even and K(j, k) = M if j and k have different parities. A considerable simplification over previous treatments is presented for the general case (K, L and M are three arbitrary positive numbers), and the time evolution of the concentrations is exhibited in completely explicit form for the (new) special case L = 4M. In another special case, K = M, the equation for the generating function of the concentrations can be reduced to quadratures; the analysis of this case, and of the general case, is postponed to a future paper MH - Italy MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000089058700003 L2 - SOLVABLE MODEL; COAGULATION SO - Journal of Physics A-Mathematical and General 2000 ;33(32):5619-5629 314 UI - 16327 AU - Camacho-Nuez M AU - Munoz MD AU - Suarez CE AU - McGuire TC AU - Brown WC AU - Palmer GH AD - Washington State Univ, Dept Vet Microbiol & Pathol, Pullman, WA 99164, USAInst Politecn Nacl, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoCENSA, Dept Biol Mol, Havana, CubaAgr Res Serv, Anim Dis Res Unit, USDA, Pullman, WA 99164, USAPalmer, GH, Washington State Univ, Dept Vet Microbiol & Pathol, Pullman, WA 99164 USA TI - Expression of polymorphic msp1 beta genes during acute Anaplasma marginale rickettsemia AB - Immunization of cattle with native MSP1 induces protection against Anaplasma marginale. The native immunogen is composed of a single MSP1a protein and multiple, undefined MSP1b polypeptides. In addition to the originally sequenced gene, designated msp1 beta(F1), we identified three complete msp1 beta genes in the Florida strain: msp1 beta(F2), msp1 beta(F3), and msp1 beta(F4). Each of these polymorphic genes encodes a structurally unique MSP1b protein, and unique transcripts can be identified during acute A. marginale rickettsemia. The structural polymorphism is clustered in discrete variable regions, and each MSP1b protein results from a unique mosaic of five variable regions. Although each of the MSP1b proteins in the Florida strain contains epitopes recognized by serum antibody induced by protective immunization with the native MSP1 complex, the variable regions also include epitopes expressed by some but not all of the MSP1b proteins. These data support testing recombinant vaccines composed of the multiple antigenically and structurally unique MSP1b proteins combined with MSP1a in order to mimic the efficacy of native MSP1 immunization MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 21 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000086010300028 L2 - MAJOR SURFACE PROTEIN-2; MULTIGENE FAMILY; MOLECULAR-BASIS; IMMUNIZATION; VARIANTS; ADHESINS; COMPLEX; ISOLATE; CATTLE; MSP-1 SO - Infection and Immunity 2000 ;68(4):1946-1952 315 UI - 15805 AU - Camacho MD AU - Mata R AU - Castaneda P AU - Kirby GC AU - Warhurst DC AU - Croft SL AU - Phillipson JD AD - Univ London, Sch Pharm, Dept Pharmaceut Chem, Ctr Pharmacognosy & Phytotherapy, London WC1N 1AX, EnglandLondon Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1, EnglandUniv Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoCamacho, MD, Univ London, Sch Pharm, Dept Pharmaceut Chem, Ctr Pharmacognosy & Phytotherapy, 29-39 Brunswick Sq, London WC1N 1AX, England TI - Bioactive compounds from Celaenodendron mexicanum AB - Bioactivity-directed fractionation of the CHCl3-MeOH extract of the leaves of Celaenodendron mexicanum by means of the brine shrimp lethality test and chromatographic techniques led to the isolation of three carboxylic acid triterpenes, the new tirucalla-type triterpene, 3 alpha-hydroxytirucalla-7,24Z-dien-26-oic acid, 3-oxotirucalla-7,24Z-dien-26-oic acid, and epi-oleanolic acid, and three biflavonoids amentoflavone, podocarpusflavone A, and podocarpusflavone B. Four non-active compounds friedelin, maytensifolin B, 3 beta-hydroxyfriedelan-16-one, and celaenodendrolide were also obtained. epi-Oleanolic acid was the most active against brine shrimps with LC50 value of 23.3 mu M in addition, all isolates were tested for in vitro antiprotozoal and cytotoxic activities. 3-Oxotirucalla-7,24Z-dien-26-oic acid and epi-oleanolic acid showed the highest activity against Leishmania donovani promastigotes with IC50 values of 13.7 and 18.8 mu M, respectively Only 3-oxotirucalla-7,24Z-dien-26-oic acid showed activity against Trypanosoma brucei brucei bloodstream forms with IC50 value of 16.8 mu M MH - United Kingdom MH - Mexico|Distrito Federal PB - STUTTGART: GEORG THIEME VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Plant Sciences;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0032-0943 UR - ISI:000087762500014 L2 - Celaenodendron mexicanum;Euphorbiaceae;3 alpha-hydroxytirucalla-7,24Z-dien-26-oic acid;3-oxotirucalla-7,24Z-dien-26-oic acid;epi-oleanolic acid;podocarpusflavone A;podocarpusflavone B;amentoflavone;antiprotozoal and cytotoxic effects;C-13 NMR; CYTOTOXICITY; QUASSINOIDS SO - Planta Medica 2000 ;66(5):463-468 316 UI - 16321 AU - Campillo B AU - Gonzalez C AU - Hernandez-Duque G AU - Juarez-Islas JA AD - UNAM, Ctr Ciencias Fis, Mexico City, DF, MexicoUNAM, Fac Quim, Dept Met, Mexico City, DF, MexicoUniv Mayab, Merida, Yucatan, VenezuelaUNAM, IIM, Dept Mat Met & Ceram, Mexico City, DF, MexicoCampillo, B, UNAM, Ctr Ciencias Fis, Mexico City, DF, Mexico TI - High-temperature corrosion observed in austenitic coils and tubes in a direct reduction process AB - The subject of this study is related to the performance of austenitic steel coils and tubes, in a range of temperatures between 425 and 870 degrees C for the transport of reducing gas, in an installation involving the direct reduction of iron-ore by reforming natural gas. Evidence is presented that metal dusting is not the only unique high-temperature corrosion mechanism that caused catastrophic failures of austenitic 304 (UNS S304 00) coils and HK-40 (UNS J94204) tubes. Sensitization as well as stress corrosion cracking occurred in 304 stainless steel coils and metal dusting took place in HK-40 tubes, a high resistance alloy. The role of continuous injection of H2S into the process is suggested to avoid the high resistance metal dusting corrosion mechanism found in this kind of installation MH - Mexico|Distrito Federal MH - Venezuela PB - MATERIALS PARK: ASM INTERNATIONAL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1059-9495 UR - ISI:000086027200013 L2 - austenitic steel;coils;corrosion;direct reduction;high temperature;METAL SO - Journal of Materials Engineering and Performance 2000 ;9(1):88-94 317 UI - 14859 AU - Campos E AU - Manning RB AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoSmithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560, USACampos, E, Univ Autonoma Baja California, Fac Ciencias, Apartado Postal 2300, Ensenada 22800, Baja California, Mexico TI - The identities of Pinnotheres nudus Holmes, 1895 and P-nudus sensu Weymouth, 1910 (Crustacea : Decapoda : Pinnotheridae) AB - The eastern Pacific species Pinnotheres nudus Holmes, 1895 is synonymized with Opisthopus transversus Rathbun, 1893. Pinnotheres nudus sensu Weymouth, 1910, named P. holmesi by Rathbun in 1918, also from the eastern Pacific, is shown to be a synonym of the western Atlantic Zaops geddesi (Miers, 1880), the second species to be assigned to the genus Zaops Rathbun, 1900 MH - Mexico|Baja California MH - USA PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 2 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000165285300022 L2 - BRACHYURA; GENUS SO - Proceedings of the Biological Society of Washington 2000 ;113(3):799-805 318 UI - 15026 AU - Candanedo-Gonzalez FA AU - Krause-Senties L AU - cosme-Vinas CM AU - Santiago-Payan H AD - Oncol Hosp, Dept Pathol, Ctr Med Nacl Siglo 21, IMSS, Mexico City, DF, MexicoOncol Hosp, Dept Surg, Ctr Med Nacl Siglo 21, IMSS, Mexico City, DF, MexicoReg Univ Hosp JM Cabral & Baez, Dept Pathol, Santiago, Dominican RepCandanedo-Gonzalez, FA, Oncol Hosp, Dept Pathol, Ctr Med Nacl Siglo 21, IMSS, Av Cuauhtemoc 330,Col Doctores 0627, Mexico City, DF, Mexico TI - Incomplete form of Carney's triad: Clinical and morphologic analysis of a case in Mexico AB - We report on the case of a 26-yr-old Mexican woman with a gastric stromal tumor associated with a carotid body paraganglioma who remained asymptomatic for 34 yr following partial gastric resection. She presented with a recurrent gastric stromal tumor and probable liver metastasis. She also had an ovarian serous cystadenoma and breast fibroadenoma. This case represents an incomplete form of Carney's triad and demonstrates the usual indolent behavior of gastric stromal tumors associated with this condition MH - Dominican Rep MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism;Pathology U5 - J;Article AV - English IS - 1046-3976 UR - ISI:000090081400009 L2 - Carney's triad;recurrent gastric stromal tumor;extraadrenal paraganglioma;EXTRA-ADRENAL PARAGANGLIOMA; GASTRIC EPITHELIOID LEIOMYOSARCOMA; GASTROINTESTINAL STROMAL TUMORS; PULMONARY CHONDROMA; NATURAL-HISTORY; EXTRAADRENAL PARAGANGLIOMA; LEIOMYOBLASTOMA SO - Endocrine Pathology 2000 ;11(3):287-294 319 UI - 16657 AU - Caplan J AU - Deharveng L AU - Pena M AU - Costero R AU - Blondel C AD - Observ Marseille, F-13248 Marseille 4, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoCEA Saclay, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceCaplan, J, Observ Marseille, 2 Pl Le Verrier, F-13248 Marseille 4, France TI - Oxygen and helium abundances in Galactic HII regions - I. Observations AB - Absolute integrated line fluxes of H II regions have been measured using a Fabry-Perot spectrophotometer. We describe the observations and calibration procedures. Fluxes are given for 36 H II regions with Galactocentric distances ranging from 6.6 to 17.7 kpc. Several emission lines have been measured, mainly [O II] lambda lambda 3726 and 3629, H beta, [O III] lambda 5007, He I lambda 5876 and H alpha. The very faint [O III] lambda 4363 line has been measured in six regions, allowing a direct determination of the electron temperature. New photometric distances have been derived based on data from the literature. A discussion of these results in terms of extinction, electron density and temperature, and oxygen and helium abundances is given in Paper II MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000084670100009 L2 - instrumentation : miscellaneous;techniques : photometric;ISM : abundances;HII regions;INITIAL MASS FUNCTION; NORTHERN MILKY-WAY; RADIAL-VELOCITIES; UBVRI PHOTOMETRY; OB ASSOCIATIONS; STANDARD STARS; ORION NEBULA; OUTER GALAXY; CALIBRATION; EXTINCTION SO - Monthly Notices of the Royal Astronomical Society 2000 ;311(2):317-328 320 UI - 14929 AU - Carbajal-Tinoco MD AU - Williams CE AD - Coll France, Lab Phys Mat Condensee, URA 792, F-75231 Paris, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoCarbajal-Tinoco, MD, Coll France, Lab Phys Mat Condensee, URA 792, 11 Pl Marcelon Berthelot, F-75231 Paris, France TI - Static properties of hydrophobic polyelectrolytes in the thermodynamic limit AB - A series of hydrophobic sodium poly(styrene-co-styrene sulfonate) of different charge fractions has been studied by static light scattering in the thermodynamic limit. In the examined concentration range (less than or equal to 0.1M/l, in monomers), the solutions show an ideal gas behaviour. A quantitative comparison with previous osmotic pressure measurements reveals the existence of a strong variation of the polarizability, which is related to a change of local chain conformation. This result can be interpreted in terms of the globular instability model for hydrophobic polyelectrolytes (pearl necklace model) MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000165233500006 L2 - POOR SOLVENTS; CHARGE SO - Europhysics Letters 2000 ;52(3):284-290 321 UI - 14590 AU - Carballo JL AU - Naranjo S AU - Kukurtzu B AU - de la Calle F AU - Hernandez-Zanuy A AD - Univ Autonoma Mexico, Estac Mazatlan, Inst Ciencias Mar & Limnol, Lab Ecol Bentos, Mazatlan 82000, MexicoPharma Mar SA Tres Cantos, Dept Biol Marina, Madrid 28760, SpainAcad Ciencias, Inst Oceanol, La Habana, CubaCarballo, JL, Univ Autonoma Mexico, Estac Mazatlan, Inst Ciencias Mar & Limnol, Lab Ecol Bentos, Apartado Postal 811, Mazatlan 82000, Mexico TI - Production of Ecteinascidia turbinata (Ascidiacea : Perophoridae) for obtaining anticancer compounds AB - Two methods have been tested in order to produce large quantities of Ecteinascidia turbinata for the extraction of anti-tumoral substances. With the first method, the capacity of generating biomass from settlement of larvae in a natural environment was estimated. The second method consisted of fragmenting colonies into small pieces, which were transplanted onto plastic screen where partial periodic collections of the colony could be carried out. For the first method, two different artificial substrates for settlement of larvae were studied: lines composed of hanging strips of wood, and plastic fords. The average production per unit of surface was significantly different between the two artificial substrates (P < 0.005) (4.25 kg/m(2) on the wooden strips after 75 days versus 1.39 kg/m(2) on the plastic cords after 80 d). The transplant experiment showed a 93% survival of the colony 26 d after the colonies were transplanted and settled, and 96.48 kg of average biomass were collected, indicating a 235% increase in biomass. This system permits stolonial regrowth of the biomass fixed on the surface, without new transplants or settlements being needed, so that a continuous production can be maintained. The fragmentation of the colonies stimulate genet growth rates through the production of small daughter colonies which individually have higher relative growth rates than large colonies and, therefore, collectively have higher absolute growth rates than a large colony of similar biomass, The production of E. turbinata using a combination of the two methods is an example of successful production of metabolites from marine organisms while protecting natural populations MH - Cuba MH - Mexico|Sinaloa MH - Spain PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 4 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000166177500001 SO - Journal of the World Aquaculture Society 2000 ;31(4):481-490 322 UI - 15806 AU - Cardenas L AU - Holdaway-Clarke TL AU - Sanchez F AU - Quinto C AU - Feijo JA AU - Kunkel JG AU - Hepler PK AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoUniv Massachusetts, Dept Biol, Morrill Sci Ctr, Amherst, MA 01003, USAGulbenkian Inst Sci, P-2780156 Oeiras, PortugalUniv Lisbon, Fac Ciencias, Dept Biol Vegetal, P-1749016 Lisbon, PortugalCardenas, L, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Apartado Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - Ion changes in legume root hairs responding to nod factors MH - Mexico|Morelos MH - Portugal MH - USA PB - ROCKVILLE: AMER SOC PLANT PHYSIOLOGISTS RP - NOT IN FILE U3 - TC 42 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000087666500004 L2 - ARABIDOPSIS-THALIANA; MEDICAGO-SATIVA; TOMATO CELLS; NODULATION SIGNALS; CHITIN FRAGMENTS; CALCIUM INFLUX; VICIA-SATIVA; POLLEN TUBES; MAIZE ROOTS; TIP GROWTH SO - Plant Physiology 2000 ;123(2):443-451 323 UI - 16506 AU - Cardenas R AU - Lin XW AU - Chavez M AU - Aramburo C AU - Peter RE AD - Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, CanadaUniv Nacl Autonoma Mexico, ENEP Iztacala, Unidad Morfol & Func, Tlalnepantla, MexicoUniv Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro, MexicoCardenas, R, Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada TI - Characterization and distribution of somatostatin binding sites in goldfish brain AB - Somatostatin (SRIF) binding sites were characterized in goldfish brain. Binding of I-125-[Tyr(11)]-SRIF-14 to a brain membrane preparation was found to be saturable, reversible, and time, temperature-, and pH-dependent. Binding was also displaceable by different forms of SRIF. Under optimal conditions (22 degrees C, pH 7.2), the equilibrium binding of I-125-[Tyr(11)]-SRIF-14 to goldfish brain membranes was achieved after 60 min incubation. Analysis of saturable equilibrium binding revealed a one-site model fit with K-a of 1.3 nM. SRIF-14, mammalian SRIF-28, and salmon SRIF-25 displaced I-125-[Tyr(11)]-SRIF-14 binding with similar affinity, whereas other neuropeptides, e.g., substance P, were unable to displace I-125-[Tyr(11)]- SRIF-14. Autoradiography studies demonstrated that I-125-[Tyr(11)]-SRIF-14 binding sites are found throughout the goldfish brain. A high density of I-125-[Tyr(11)]-SRIF-14 binding sites was found in the forebrain, including the nucleus preopticus, nucleus preopticus periventricularis, nucleus anterioris periventricularis, nucleus lateralis tuberis, nucleus dorsomedialis thalami, nucleus dorsolateralis thalami, nucleus ventromedialis thalami, and nucleus diffusus lobi inferioris. In midbrain, I-125-[Tyr(11)]- SRIF-14 binding sites were found in the optic tectum. The facial and vagal lobes and the mesencephalic-cerebellar tract were found to have a high density of binding sites. This study provides the first characterization and distribution of specific binding sites for SRIF in a fish brain. (C) 2000 Academic Press MH - Canada MH - Mexico|Queretaro MH - Mexico|Estado De Mexico PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 12 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0016-6480 UR - ISI:000085416600010 L2 - somatostatin;binding sites;goldfish;brain distribution;CARASSIUS-AURATUS; RAT-BRAIN; IMMUNOCYTOCHEMICAL IDENTIFICATION; ONCORHYNCHUS-MYKISS; RAINBOW-TROUT; RECEPTORS; HORMONE; PITUITARY; GROWTH; LOCALIZATION SO - General and Comparative Endocrinology 2000 ;117(1):117-128 324 UI - 14646 AU - Cardenas T AU - Cardenas R AU - Mills CO AU - Milkiewicz P AU - Coleman R AU - Elias E AD - Univ Hosp Birmingham, Liver Unit, Birmingham, W Midlands, EnglandUNAM, Fac Sci, Mexico City, DF, Mexico TI - Biological properties of a novel fluorescent derivative of deoxycholic acid MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000089622401307 SO - Hepatology 2000 ;32(4):490A-490A 325 UI - 14973 AU - Cardenosa O AU - Soto-Hernandez JL AD - Bayer Latinoamer, Dept Clin Res, Mexico City, DF, MexicoInst Nacl Neurol & Neurocirugia, Dept Infect Dis, Mexico City, DF, MexicoCardenosa, O, Quim Farmaceut Bayer SA, Calabria 268, E-08029 Barcelona, Spain TI - In vitro activity of moxifloxacin (BAY 12-8039) against respiratory tract pathogens from six Latin-American countries AB - The in vitro antibacterial activity of moxifloxacin (BAY 12-8039) was evaluated against 636 isolates of respiratory tract pathogens. The isolates were collected from July 1997 to August 1998 in the frame of a multinational Latin American study. E-test strips calibrated to read moxifloxacin MIC ranges from 0.002 to 32 mug/ml were used in susceptibility testing. Weekly quality control tests in each laboratory ensured reproducibility. Laboratories from Argentina, Brazil, Chile, Colombia, Mexico and Uruguay participated. MIC90 for moxifloxacin were as follows: Streptococcus pneumoniae (304 isolates) 0.25 mug/ml, Haemophilus influenzae (135 isolates) 0.125 mug/ml mi, Streptococcus pyogenes (66 isolates) 0.25 mug/ml, Moraxella catarrhalis (62 isolates) 0.25 mug/ml and methicillin-sensitive Staphylococcus aureus (69 isolates) 0.25 mug/ml. These results agreed with reports from other areas. Moxifloxacin showed excellent activity against respiratory pathogens from participant countries. Copyright (C) 2000 S.Karger AG, Basel MH - Mexico|Distrito Federal MH - Spain PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 3 U4 - Oncology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0009-3157 UR - ISI:000090151600001 L2 - moxifloxacin;microbial sensitivity tests;respiratory tract infections;BAY-12-8039; FLUOROQUINOLONE; QUINOLONE SO - Chemotherapy 2000 ;46(6):379-382 326 UI - 16426 AU - Cardoso JL AU - Pereyra P AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Mexico City 02200, DF, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USACardoso, JL, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, Mexico TI - Critical currents and the Ambegaokar-Baratoff to Ginsburg-Landau crossover in granular superconductors AB - A simple expression for the transport critical current, which describes rather well the Ambegaokar-Baratoff (A-B) to Ginsburg-Landau (G-L) crossover, is obtained from an elementary analysis of a Josephson junction subject to external magnetic fields within the Ginsburg-Landau theory. We show that the order parameter in the intergrain region depends crucially on the interplay of two characteristic lengths: the superconducting coherence length xi proportional to(1-T/T-c)(-1/2) and the junction-induced superconducting decoherence length zeta(q)proportional to(1 - T/T-c)(-alpha). Data for the transport critical current in granular YBCO samples are presented, and the A-B to G-L crossovers successfully described MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000085707100082 L2 - CRITICAL-CURRENT-DENSITY; YBA2CU3O7-DELTA; TRANSPORT; SYMMETRY; FILMS; JUNCTIONS; STATE SO - Physical Review B 2000 ;61(9):6360-6365 327 UI - 14977 AU - Carraminana A AU - Cadez A AU - Zwitter T AD - Inst Nacl Astrofis Opt & Electron, Puebla 72840, MexicoUniv Ljubljana, Dept Phys, Ljubljana 61000, SloveniaCarraminana, A, Inst Nacl Astrofis Opt & Electron, Luis Enrique Erro 1, Puebla 72840, Mexico TI - Optical spectrum of main-, inter-, and off-pulse emission from the crab pulsar AB - A dedicated stroboscopic device was used to obtain optical spectra of the Crab pulsar main pulse and interpulse as well as the spectrum of the underlying nebula when the pulsar is turned off. Since the nebular emission is very inhomogeneous, our ability to effectively subtract the nebular background signal is crucial. No spectral lines intrinsic to the pulsar are detected. The main pulse and the interpulse behave as power laws, both with the same dereddened index alpha = +-0.2 +/- 0.1. This value was obtained by subtracting the nebular spectrum at the exact position of the pulsar. The underlying nebula is redder, alpha = -0.4 +/- 0.1. Its emission lines are split into approaching (similar to -1200 km s(-1)) and receding (similar to +600 km s(-1)) components. The strength of the emission line components and the flux in the nebular continuum vary on an arcsecond scale. The nebular line and continuum intensities along the north-south slit are given MH - Mexico|Puebla MH - Slovenia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165095500040 L2 - pulsars : individual (PSR B0531+21);stars : neutron;supernova remnants;techniques : spectroscopic;ULTRAVIOLET SO - Astrophysical Journal 2000 ;542(2):974-977 328 UI - 14827 AU - Carreno-Lopez R AU - Campos-Reales N AU - Elmerich C AU - Baca BE AD - Inst Pasteur, CNRS URA D2172, Unite Physiol Cellulaire, F-75724 Paris, FranceUniv Autonoma Puebla, Ctr Invest Microbiol, Puebla 72000, MexicoElmerich, C, Inst Pasteur, CNRS URA D2172, Unite Physiol Cellulaire, 25-28 Rue Dr Roux, F-75724 Paris, France TI - Physiological evidence for differently regulated tryptophan-dependent pathways for indole-3-acetic acid synthesis in Azospirillum brasilense AB - Disruption of ipdC, a gene involved in indole-3-acetic acid (IAA) production by the indole pyruvate pathway in Azospirillum brasilense Sp7, resulted in a mutant strain that was not impaired in IAA production with lactate or. pyruvate as the carbon source. A tryptophan auxotroph that is unable to convert indole to tryptophan produced IAA if tryptophan was present but did not synthesise IAA fi-om indole. Similar results were obtained for a mutant strain with additional mutations in the genes idpC and trpD. This suggests the existence of an alternative Trp-dependent route for IAA synthesis. On gluconate as a carbon source, IAA production by the ipdC mutant was inhibited, suggesting that the alternative route is regulated by catabolite repression. Using permeabilised cells we observed the enzymatic conversion of tryptamine and indole-3-acetonitrile to IAA, both in the wild-type and in the ipdC mutant. IAA production from tryptamine was strongly decreased when gluconate was the carbon source MH - France MH - Mexico|Puebla PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0026-8925 UR - ISI:000165468700019 L2 - Azospirillum brasilense;indole-3-acetic acid synthesis;ipdC gene;tryptamine;indole-3-acetonitrile;INDOLE-3-PYRUVATE DECARBOXYLASE GENE; PLANT-ASSOCIATED BACTERIA; INDOLEPYRUVATE DECARBOXYLASE; ENTEROBACTER-CLOACAE; INDOLEACETIC-ACID; ERWINIA-HERBICOLA; MOLECULAR-CLONING; BIOSYNTHESIS; IDENTIFICATION; MUTAGENESIS SO - Molecular and General Genetics 2000 ;264(4):521-530 329 UI - 15981 AU - Carreon MP AU - Aliev R AU - Ocampo R AU - Burillo G AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, FranceAliev, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Radiation grafting of N,N-dimethylaminoethylmethacrylate onto poly(ethylene terephthalate) AB - Radiation-induced graft polymerization of N,N-dimethylaminoethylmethacrylate (DMAEMA) from 50% solution in chloroform onto poly(ethylene terephthalate) (PET) was carried out by means of mutual gamma-irradiation of polymer in presence of liquid or vapor phase monomer solutions (direct method), or by grafting of monomer from this liquid solution onto polymer preirradiated in air. It has been shown higher effectiveness of grafting by the direct method from vapor phase of monomer or by the preirradiation method as compared with direct grafting from liquid monomer solution. Grafting did not affect crystallinity, transparency and durability of the starting PET MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0170-0839 UR - ISI:000087065900014 L2 - CRYSTALLINE POLYMERIC MATERIALS; POLY(ETHYLENE-TEREPHTHALATE); FIBERS SO - Polymer Bulletin 2000 ;44(3):331-335 330 UI - 15801 AU - Carriere D AU - du Pasquier A AU - Urbina RH AU - Tarascon JM AD - Univ Picardie, LRCS, F-80039 Amiens, FranceTelcordia, Red Bank, NJ 07701, USAUniv Sonora, Hermosillo 83000, Sonora, MexicoTarascon, JM, Univ Picardie, LRCS, 33 Rue St Leu, F-80039 Amiens, France TI - A reversible inorganic electrochromic solution system AB - Electrochromic devices that respond to varied levels of applied electrical potential by changing light opacity are presently prepared from either insertion compounds or reversible electrodeposition of metals from solution. We report here another approach to electrochromics based on the reversible deposition/dissolution of silver oxide onto FTO-coated glass from an aqueous solution containing silver (I)-ammonia complexes. The basic redox chemistry underlying the functioning of this electrochromic system has been identified using traditional techniques such as X-ray diffraction, scanning electron microscopy, and cyclic voltammetry, as well as a quartz nanobalance for measuring the working electrode weight at different potentials. The AgNH3+ <-> AgO reaction is responsible for the coloration/decoloration of the working electrode, which can be repeatedly cycled between various states of visual opacity. Optical measurements reveal that the transmittance of the working electrode in the visible region drastically drops from 80% without silver oxide deposition to 4% when it is coated with a silver oxide him. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Letter AV - English IS - 0927-0248 UR - ISI:000087661800008 L2 - silver oxide;electrochromic devices;electrodeposition SO - Solar Energy Materials and Solar Cells 2000 ;62(4):431-439 331 UI - 14931 AU - Carrillo-Chavez A AU - Drever JI AU - Martinez M AD - UNAM, UNICIT, Inst Geol, Juriquilla 76230, Qro, MexicoUniv Wyoming, Dept Geol & Geophys, Laramie, WY 82071, USAUABCS, Dept Geol, La Paz 23080, BCS, MexicoCarrillo-Chavez, A, UNAM, UNICIT, Inst Geol, Campus Juriquilla,AP 15, Juriquilla 76230, Qro, Mexico TI - Arsenic content and groundwater geochemistry of the San Antonio El Triunfo, Carrizal and Los Planes aquifers in southernmost Baja California, Mexico AB - The San Antonio-El Triunfo mining district, located at a mountainous region 45 km southeast of La Pat, Baja California, has been worked since the late 1700s. Mine waste material produced during 200 years of mineral extraction area poses a risk of local groundwater pollution and eventually, regional pollution to the Carrizal (west basin) and the Los Planes (east basin) aquifers. There are different types of deposits in the mining area. These are dominated by epithermal veins, in which arsenopyrite is an important component. Carrillo and Drever (1998a) concluded that, even though the amount of mine waste is relatively small in comparison on to the large scale area, significant As in groundwater derived from the mine waste piles is found locally in the groundwater. This paper shows the results of geochemical analyses of groundwater samples from the San Antonio-El Triunfo area and the Carrizal and Los Planes aquifers during several years of monitoring (1993-1997). The highest values of total dissolved solids (TDS) and As are in the mineralized area where the mining operations occurred (similar to 1500 ppm TDS and 0.41 ppm As). The lowest concentrations of TDS and As are, in general away from the mineralized area (similar to 500 ppm TDS and 0.01 ppm As). Sulfate and bicarbonate (al-kalinity) are, in general, high near the mineralized area and low away from it. The arsenic concentrations vary seasonally, especially after the heavy summer thunderstorms. Geochemical modeling (MINTEQA2 and NETPATH) and analysis of the regional geochemical evolution of the groundwater from the mining area towards the aquifer of Los Planes shows that the most likely hydrochemical processes include: dilution, precipitation of calcite and adsorption of As onto surfaces of iron oxyhydroxides (ferrihydrite). These processes act as natural controls to the extent and amount of As pollution in the Carrizal and Los Planes aquifers MH - Mexico|Baja California Sur MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000165191700009 L2 - arsenic in groundwater;Baja California Peninsula;geochemical modeling;mine waste material;IRON-OXIDES; ADSORPTION; MINE; REMEDIATION; WATER SO - Environmental Geology 2000 ;39(11):1295-1303 332 UI - 16301 AU - Carrillo-Garcia A AU - Bashan Y AU - Rivera ED AU - Bethlenfalvay FJ AD - Ctr Invest Biol Noroeste, La Paz 23000, BCS, MexicoARS, USDA, Corvallis, OR 97330, USABethlenfalvay, FJ, Ctr Invest Biol Noroeste, AP 128, La Paz 23000, BCS, Mexico TI - Effects of resource-island soils, competition, and inoculation with Azospirillum on survival and growth of Pachycereus pringlei, the giant cactus of the Sonoran Desert AB - Resource-island soils formed by some plants in arid lands are capable of supporting certain plants that do not normally establish in surrounding areas free of vegetation. We determined growth responses of Pachycereus pringlei (cardon), the giant columnar cactus, whose widespread, finely branched, subsurface root systems stabilize desert soils, to four soils collected from within or outside of resource islands. Traits of cardon grown in soils from mature (MM) or young (YM) Prosopis articulata (mesquite), mature Olnea testosa (ironwood, MI), or bare areas (BA) were compared, to determine differences between the effects of soils due to the identity or the stage of development of nurse plants. The levels of soil N, P, and C contents were in the order MM> > YM > MI greater than or equal to BA. The BA soil had the coarsest and MM soil the finest texture. Cardon was also grown in pot cultures inoculated with the plant-growth-promoting bacterium Azospirillum brasilense, or in association with a competing grass, Sorghum bicolor (sorghum). Competition did not affect survival rates of cardon in any of the soils after six months of growth, but decreased biomass accumulation by up to 90% in the best (MM) soil. Inoculation of cardon seeds with A. brasilense did not affect survival but resulted in significantly better root and shoot growth, and this effect increased linearly as soil nutrients declined. In the best soil (MM), A. brasilense had no effect on cardon growth, but in the poorest soil (BA) shoot dry mass was almost 60% and root length over 100% greater as a result of inoculation, with responses in the other two soils intermediate. This effect did not appear to be owing to N-2 fixation, as nitrogenase activity (acetylene reduction) was not detected in any of the treatments. Soil formation by selected nurse trees in arid areas is an important factor in plant establishment and growth, and the present results indicate that these processes can be impeded or facilitated by the introduction of competing or beneficial organisms. The use of beneficial microorganisms associated with roots may accelerate the restoration of disturbed areas MH - Mexico|Baja California Sur MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 22 U4 - Ecology U5 - J;Article AV - English IS - 1061-2971 UR - ISI:000086013300009 L2 - Azospirillum;desert soils;nitrogen fixation;nurse plant;Pachycereus pringlei;plant survival;resource-island;RHIZOSPHERE BACTERIA; TRITICUM-AESTIVUM; YIELD RESPONSE; NURSE PLANTS; BRASILENSE; ECOSYSTEM; NITROGEN; MEXICO; FACILITATION; ASSOCIATION SO - Restoration Ecology 2000 ;8(1):65-73 333 UI - 16488 AU - Carrillo-Garcia A AU - Bashan Y AU - Bethlenfalvay GJ AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja Calif Sur, MexicoARS, USDA, Corvallis, OR 97330, USABethlenfalvay, GJ, Ctr Invest Biol Noroeste, AP 128, La Paz 23000, Baja Calif Sur, Mexico TI - Resource-island soils and the survival of the giant cactus, cardon, of Baja California Sur AB - Early survival and growth of some plants in arid environments depends on facilitation by a nurse plant. Amelioration of soil temperature extremes through shading and accumulation of mineral nutrients near nurse-plants are mechanisms of facilitation. We investigated the effects of shading (soil temperature) and soil type on survival and growth of the giant columnar cactus, cardon (Pachycereus pringlei). Cardon was grown either in a sandy clay-loam soil obtained from resource islands formed under mature mesquite (Prosopis articulata) or in the loamy-sand soil from plant-free bare areas that surround the islands. Seedlings were potted in these soils and the pots were buried to ground level in the open. We also determined plant responses to fertilization with N, P, K or NPK in the bare-area soils. Enhancement of survival and growth in the resource-island soils compared to that in the bare-area soils was highly significant. Plants survived and grew better in resource-island soils than in bare-area soil, an effect that was enhanced by shading (one-half of full sun). Greater root/shoot ratios of plants grown in bare-area soil indicated increased resource allocation to roots under limiting conditions. Significant interactions (analysis of variance) indicated that the soil and sun factors of the experiment were not independent of one another. Plant growth in bare-area soil improved considerably (> 200%) in response to N fertilization (screenhouse conditions), and approximated that of plants in resource-island soil without N amendment. The growth response to P was small (< 50%), while K did not affect growth significantly. Responses to NPK were similar to those to N alone. The results suggested that shading and nutritional effects interact in determining early survival and growth of cardon in different soils MH - Mexico|Baja California Sur MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 22 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000085307600020 L2 - facilitation;nurse-plant effect;Pachycereus pringlei;plant survival;Prosopis articulata;resource island;revegetation;soil temperature;DESERT ECOSYSTEM; SHRUB-STEPPE; FRAMEWORK; COMMUNITY; SAVANNA; PLANTS; MEXICO SO - Plant and Soil 2000 ;218(1-2):207-214 334 UI - 14651 AU - Carrillo E AU - Wong G AU - Cuaron AD AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoCtr Agron Invest & Ensenanza, Unidad Area Protegidas, Turrialba, Costa RicaUniv Massachusetts, Dept Forestry & Wildlife Management, Amherst, MA 01003, USAUniv Nacl, Programa Reg Manejo Vida Silvestre, Heredia, Costa RicaCuaron, AD, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Monitoring mammal populations in Costa Rican protected areas under different hunting restrictions AB - If is necessary to assess whether the management of protected areas is achieving the objectives set for them. In particular, changes and trends in wildlife populations should be documented. We compared the 1990 abundance of mammals in two Costa Rican protected areas Corcovado National Park (CNP) and Golfo Dulce Forest Reserve (GDFR), with similar environmental characteristics bat different hunting restrictions and levels of protection. We also monitored the abundance of mammals in CNP over a 4-year period. We also devised an inexpensive method of monitoring tropical rainforest mammal populations in a timely and efficient manner. The method is based on the use of mammal track records and arboreal mammal sightings and requires little effort. With this method 20 mammal species were recorded at CNP and 15 at GDFR. Species were consistently less abundant in GDFR than in CNP, principally those species preferred by hunters. Species were grouped according to whether or not they are used as food and whether they are locally or globally threatened or not threatened. The abundance of all these groups of species in GDFR was 6-28% the abundance in CNP. During 1990-1994, overall mammal abundance in CNP remained relatively stable, but there was considerable variability among species. As a group, both species used for food and globally threatened species declined in abundance during that period in CNP. The abundance of all groups of species declined from 1992 to 1994, coinciding with a reduction in hunting vigilance at CNP. Evidence suggests that the main factor differentiating the abundance of mammals in the two protected areas, and at CNP during the study period, was the level of hunting. Golfo Dulce Forest Reserve seems to be achieving only partial success in protecting wildlife, whereas Corcovado National Park seems to be considerably more effective, although not entirely successful MH - Costa Rica MH - Mexico|Michoacan MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 22 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000166035800007 L2 - NEOTROPICAL FORESTS; FELIS-CONCOLOR; COMMUNITIES; SEQUEL SO - Conservation Biology 2000 ;14(6):1580-1591 335 UI - 16009 AU - Carrillo L AU - Villafuerte-Castrejon ME AU - Gonzalez G AU - Sansores LE AU - Bucio L AU - Duque J AU - Pomes R AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoCtr Nacl Invest Cient, La Habana, CubaCarrillo, L, Natl Autonomous Univ Mexico, Inst Invest Mat, AP 70-3600,Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - Superstructure determination of the perovskite beta La0.33NbO3 AB - New interesting results in the crystal structure of the perovskite beta La0.33NbO3 were revealed using selected area electron diffraction, powder X-ray diffraction techniques and Rietveld refinement method. Although the superstructure of beta La0.33NbO3 could not be seen by conventional X-ray powder diffraction technique, the electron diffraction patterns revealed weak spots resulting in a superstructure array for the atoms of beta La0.33NbO3. The crystal symmetry is compatible with an orthorhombic cell, space group Cmmm. From Rietveld refinement, the resulting lattice parameters are: a = 7.82(1) Angstrom, b = 7.83(9) Angstrom, c = 7.90(9) Angstrom and goodness of fit R = 0.1107, Rwp = 0.15. The superstructure is built from distorted octahedra NbO6 along the [001] axis. Results suggest that this distortion may be produced by occupation of La atoms in (2a) and (4l) sites. (C) 2000 Kluwer Academic Publishers MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000087069000018 L2 - LN = LA; LUMINESCENCE; NIOBATES; CE; PR; ND SO - Journal of Materials Science 2000 ;35(12):3047-3052 336 UI - 14966 AU - Cartagena E AU - Bardon A AU - Catalan CAN AU - de Hernandez ZNJ AU - Hernandez LR AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - Germacranolides and a new type of guaianolide from Acanthospermum hispidum AB - The aerial parts of an Argentinian collection of Acanthospermum hispidum afforded 26 sesquiterpene lactones, including the two guaianolides (1 and 2) having a novel oxygen bridge between C-4. and C-14, three new cis,cis-germacranolides (4, 7, and 8), and two new melampolides (25 and 26). Guaianolides 1 and 2 seem to derive biosynthetically from the germacranolide 27 having the (1DD5)-D-14,15 conformation. The structures were elucidated using extensive spectroscopic analysis MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000165093900001 L2 - SESQUITERPENE LACTONES; MELAMPOLIDES; CONSTITUENTS SO - Journal of Natural Products 2000 ;63(10):1323-1328 337 UI - 15016 AU - Cartas-Fuentevilla R AD - Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoCartas-Fuentevilla, R, Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA TI - Adjoint operators and perturbation theory of black holes AB - We present a new approach for finding conservation laws in the perturbation theory of black holes which applies for the more general cases of non-Hermitian equations governing the perturbations. The approach is based on a general result which establishes that a covariantly conserved current can be obtained from a solution of any system of homogeneous linear differential equations and a solution of the adjoint system. It is shown that the results obtained from the present approach become essentially the same (with some differences) to those obtained by means of the traditional methods in the simplest black hole geometry corresponding to the Schwarzschild space-time. The future applications of our approach for studying the perturbations of black hole space-times in string theory is discussed. (C) 2000 American Institute of Physics. [S0022-2488(00)00311-X] MH - USA MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000089990200021 SO - Journal of Mathematical Physics 2000 ;41(11):7521-7528 338 UI - 15131 AU - Carvajal M AU - Lemus R AU - Frank A AU - Jung C AU - Ziemniak E AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoLemus, R, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apdo Postal 70-543,Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - An extended SU(2) model for coupled Morse oscillators AB - The SU(2) vibron model has been shown to correspond to an approximation where only the dominant Delta upsilon = ii interaction between Morse oscillators is taken into account [A. Frank, R. Lemus, M. Carvajal, C. Jung, E. Ziemniak, Chem. Phys, Lett, 308 (1999) 91]. We extend the algebraic model in order to incorporate higher-order couplings for the Morse oscillators, thus, providing a means to establish an exact quantum-mechanical connection with traditional phase-space descriptions of molecular vibrations. Results for the energy spectrum for two coupled Morse oscillators are compared with both the traditional and extended SU(2) models, as well as with the Child-Lawton model. The wave functions corresponding to the different models are also examined. A classical analysis is carried out in order to further explore the interrelations between these models. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 26 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0301-0104 UR - ISI:000089701700009 L2 - STRETCHING OVERTONE SPECTRA; ROTATION-VIBRATION SPECTRA; POLYATOMIC-MOLECULES; TRIATOMIC-MOLECULES; ALGEBRAIC APPROACH; APPROXIMATE CONSTANTS; BENDING VIBRATIONS; ENERGY-TRANSFER; VIBRON MODEL; MOTION SO - Chemical Physics 2000 ;260(1-2):105-123 339 UI - 15300 AU - Carvalho A AU - Garcia-Montalvo V AU - Domingos A AU - Cea-Olivares R AU - Marques N AU - de Matos AP AD - ITN, Dept Quim, P-2686953 Sacavem, PortugalUniv Nacl Autonoma Mexico, Inst Quim, Mexico City, DF, Mexicode Matos, AP, ITN, Dept Quim, Estrada Nacl 10, P-2686953 Sacavem, Portugal TI - Synthesis and characterization of thorium and uranium tetraphenylimidophosphinate complexes. Crystal and molecular structures of Th(tpip)(4), U(tpip)(4) and UCl(tpip)(3) AB - Tetra(tetraphenylimidophosphinato)thorium, Th(tpip)(4) (1), was obtained from Th(NO4). 4H(2)O and Ktpip in aqueous medium. The analogous uranium compound, U(tpip)(4) (2), has been prepared by reacting UCl4 with Ktpip in a 1:4 stoichiometric ratio, either in THF or in aqueous solution. X-ray diffraction analysis showed that compounds 1 and 2 were isostructural. The metal center is eight-coordinate by way of four bidentate tetraphenylimidophosphinate ligands in a square antiprismatic configuration. UCl(tpip)(3) (3) has been isolated from the reaction of uranium tetrachloride with 3 equiv. of Ktpip in aqueous solution. When this reaction was run in THF both compounds, U(tpip)(4) and UCl(tpip)(3), were obtained. The molecular structure of 3 has been determined by X-ray crystallography. The uranium atom is seven-coordinate in a pentagonal bipyramidal configuration. These compounds were also characterized by infrared and H-1 and P-31 NMR spectroscopies. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Portugal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000089148800007 L2 - uranium;thorium;coordination compounds;tetraphenylimidophosphinate ligand;X-ray crystal structures;NMR-SHIFT-REAGENTS; X-RAY STRUCTURE; ACIDS SO - Polyhedron 2000 ;19(14):1699-1705 340 UI - 15991 AU - Casini H AU - D'Olivo JC AU - Montemayor R AD - Ctr Atom Bariloche, RA-8400 Bariloche, Rio Negro, ArgentinaCNEA, Inst Balseiro, RA-8400 Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, RA-8400 Bariloche, Rio Negro, ArgentinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoCasini, H, Ctr Atom Bariloche, RA-8400 Bariloche, Rio Negro, Argentina TI - Violation of the equivalence principle oscillation solutions to the solar neutrino problem AB - We study the solar neutrino problem within the framework of a parametrized post-Newtonian formulation for the gravitational interaction, which incorporates a violation of the equivalence principle (VEP), and examine the more important VEP effects using the current data on the rates and the energy spectrum. We find two possible solutions for the neutrino rate, one of them involving the MSW effect in matter and the other corresponding to a vacuum oscillation. In both cases, a semi-annual seasonal modulation of the neutrino flux is predicted, because of the anisotropic contributions to the gravitational effects. Our analysis provides new constraints for some VEP parameters MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000087046300041 L2 - HIGH STATISTICS SEARCH; ANALYTIC DESCRIPTION; MATTER; SPECTROSCOPY; MODELS SO - Physical Review D 2000 ;6110(10): 341 UI - 16598 AU - Casis O AU - Gallego M AU - Iriarte M AU - Sanchez-Chapula JA AD - Univ Basque Country, Sch Pharm, Dept Physiol, Bilbao 48080, SpainFdn Res & Teaching Cardiovasc Dis, Bilbao, SpainUniv Colima, Univ Ctr Biomed Res, Colima, MexicoCasis, O, Univ Basque Country, Sch Pharm, Dept Physiol, POB 699, Bilbao 48080, Spain TI - Effects of diabetic cardiomyopathy on regional electrophysiologic characteristics of rat ventricle AB - Aims/hypothesis. To identify the possible causes of the lengthening of the action potential duration described in patients affected by diabetes mellitus. Methods. We studied the effects of streptozotocin-induced diabetes on the current density of the repolarising potassium currents I-to, I-K, I-ss and I-K1 in enzymatically isolated myocytes from three different regions of rat heart: total right ventricle, subepicardium at the apex of the left ventricle and subendocardium at the base of the left ventricle, Results. No changes in I-K1 were found due to diabetes, but there was a uniform decrease in I-to (50%) and I-ss (40%) current densities in the three regions. In contrast, I-K diminished unevenly, with the greatest decrease in the subendocardium at the base of the left ventricle (48%), followed by the subepicardium at the apex of the left ventricle (32%) and right ventricle (10%). Conclusion/interpretation. These findings suggest the existence of regional differences in ion channel expression associated with diabetes. The decrease of these repolarising currents could account for the lengthening of action potential and the consequent change in the Q-T interval of the ECG observed in diabetic rats MH - Mexico|Colima MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 28 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0012-186X UR - ISI:000084938000013 L2 - patch-clamp;potassium currents;diabetes;action potential;rat;TRANSIENT OUTWARD CURRENT; QT INTERVAL PROLONGATION; POTASSIUM CURRENTS; AUTONOMIC NEUROPATHY; ACTION-POTENTIALS; K+ CURRENTS; MYOCYTES; CALCIUM; HETEROGENEITY; MELLITUS SO - Diabetologia 2000 ;43(1):101-109 342 UI - 14647 AU - Caspeta-Mandujano JM AU - Moravec F AU - guilar-Aguilar R AD - Autonomous Univ Morelos State, Biol Res Ctr, Cuernavaca 62210, Morelos, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoCaspeta-Mandujano, JM, Autonomous Univ Morelos State, Biol Res Ctr, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Cucullanus mexicanus sp n. (Nematoda : Cucullanidae) from the intestine of the freshwater catfish Rhamdia guatemalensis (Pimelodidae) in Mexico AB - A new cucullanid nematode, Cucullanus mexicanus sp. n., is described from specimens recovered from the intestine of the freshwater catfish Rhamdia guatemalensis (Gunther) (Pisces, Pimelodidae) from three localities (brooks El Saltillo, Valle Nacional and San Juan Bautista) in the State of Oaxaca, central Mexico. The new species, belonging to the subgenus Cucullanus, distinctly differs from all its congeners in having an unusually large, conspicuously elongated precloacal sucker and only one pair of preanal papillae near it; it is further characterized by almost equal spicules (length 330-356 mum), a small Y-shaped gubernaculum, and by the distribution of caudal papillae in the male. Cucullanus mexicanus sp. n. is the second freshwater species of the genus reported from Mexico MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BRATISLAVA: SLOVAK ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 10 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 0440-6605 UR - ISI:000165983500006 L2 - Cucullanus;nematode;freshwater fish;Rhamdia guatemalensis;Mexico SO - Helminthologia 2000 ;37(4):215-217 343 UI - 14904 AU - Caspeta-Mandujano JM AU - Moravec F AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicAutonomous Univ Morelos State, Biol Res Ctr, Cuernavaca 62210, Morelos, MexicoCaspeta-Mandujano, JM, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Two new intestinal nematodes of Profundulus labialis (Pisces, Cyprinodontidae) from fresh waters in Mexico AB - Two new nematode species, Rhabdochona salgadoi sp. n. and Spinitectus humbertoi sp. n., are described on the basis of specimens recovered from the intestine of Profundulus labialis (Gunther) (Cyprinodontidae) from a brook near Inzcuinatoyac (the Pacific Ocean basin), Guerrero, Mexico. Rhabdochona salgadoi is characterised largely by the presence of 16 anterior teeth in the prostom and their arrangement, shape of the oral opening, absence of papilla-like structures on the mat-gin of oral aperture, broad distal tip of the larger (left) spicule bearing a membrane, and by the tail tip of females tending in a terminal formation bearing small cuticular processes). Spinitectus humbertoi is noted for possessing a characteristic spination of the cuticle separated into 4 longitudinal sectors, more or less regularly spaced rings with small variation in size and number (36-38 in first ring) of spines in the visible rings, and for the situation of the excretory pore between the seventh and the eighth rings of spines MH - Czech Republic MH - Mexico|Morelos PB - WARSAW: WITOLD STEFANSKI INST PARASITOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Parasitology U5 - J;Article AV - English IS - 1230-2821 UR - ISI:000165343700008 L2 - Rhabdochona salgadoi sp n.;Spinitectus humbertoi sp n.;Nematoda;Profundulus labialis;freshwater fish;Mexico;CYSTIDICOLIDAE SO - Acta Parasitologica 2000 ;45(4):332-339 344 UI - 15084 AU - Caspeta-Mandujano JM AU - Moravec F AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicAutonomous Univ Morelos State, Biol Res Ctr, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoCaspeta-Mandujano, JM, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Rhabdochona mexicana sp n. (Nematoda : Rhabdochonidae) from the intestine of characid fishes in Mexico AB - A new nematode, Rhabdochona mexicana sp. n., is described based on specimens recovered from the intestine of two species of fishes, Astyanax mexicanus (De Filippi) (type host) and Astyanax fasciatus (Cuvier) (Characidae: Characiformes) in central Mexico. This species is characterised by the following characters: 10 anteriorly directed teeth in the prostom, a larger (left) spicule which is slender in form with a small bifurcation at its distal tip covered by a cuticular membrane, a smaller (right) spicule without a barb at its distal tip, eggs bearing an irregular flock-like coating, and a conical tail without a cuticular spike (in both sexes) MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 8 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000089770100008 L2 - nematoda;Rhabdochona;Astyanax;freshwater fish;Mexico SO - Folia Parasitologica 2000 ;47(3):211-215 345 UI - 16333 AU - Caspeta-Mandujano JM AU - Moravec F AU - gado-Yoshino MA AU - Salgado-Maldonado G AD - Autonomous Univ Morelos State, Biol Res Ctr, Cuernavaca 62210, Morelos, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoCaspeta-Mandujano, JM, Autonomous Univ Morelos State, Biol Res Ctr, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Seasonal variations in the occurrence and maturation of the nematode Rhabdochona kidderi in Cichlasoma nigrofasciatum of the Amacuzac River, Mexico AB - The seasonal dynamics of the occurrence and maturation of Rhabdochona kidderi in its definitive host, Cichlasoma nigrofasciatum (Gunther), are investigated. The results are based on monthly samples of fish (a total of 520 fishes were examined) collected in the Amacuzac River (locality 'El Chisco"), State of Morelos, Mexico, from February 1996 to February 1997. The nematodes occurred in fish throughout the study period, with the highest values of prevalence and mean intensity in April and June, respectively. Gravid female nematodes with mature eggs were present throughout the year, with the lowest occurrence in September. These observations represent the first data on the seasonality of a Rhabdochona Railliet, 1916 species from a tropical region MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BRATISLAVA: SLOVAK ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 5 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 0440-6605 UR - ISI:000086002000006 L2 - nematode;seasonal maturation;R. kidderi;freshwater fish;C. nigrofasciatum;Mexico SO - Helminthologia 2000 ;37(1):29-33 346 UI - 16529 AU - Caspeta-Mandujano JM AU - Moravec F AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicCaspeta-Mandujano, JM, Autonomous Univ Morelos State, Biol Res Ctr, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Spinitectus mexicanus n. sp (Nematoda : Cystidicolidae) from the intestine of the freshwater fish Heterandria bimaculata in Mexico AB - A new nematode, Spinitectus mexicanus n. sp., is described on the basis of the specimens recovered from the intestine of Heterandria bimaculata (Heckel) (Poeciliidae, Cyprinodontiformes) from 3 rivers of the Papaloapan River basin (type locality La Basura River), Los Tuxtlas, Veracruz State, Mexico. It differs from its congeners mainly in having the spination of the cuticle separated into 3 longitudinal sectors, each with posteriorly diminishing numbers of larger spines at the anterior part of body. It is the first species of Spinitectus described from a poeciliid fish and the second reported from freshwater fishes in Mexico MH - Czech Republic MH - Mexico|Morelos PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 10 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000085260100015 L2 - PARASITE; GENUS SO - Journal of Parasitology 2000 ;86(1):83-88 347 UI - 14982 AU - Castaneda-Guzman R AU - Villagran-Muniz M AU - Saniger-Blesa JM AU - Perez-Ruiz SJ AU - Perez-Martinez O AD - Natl Autonomous Univ Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoUniv La Habana, Fac Fis, Dept Inst Mat & React Elect, La Habana, CubaCastaneda-Guzman, R, Natl Autonomous Univ Mexico, Ctr Instrumentos, AP 70-186, Mexico City 04510, DF, Mexico TI - Photoacoustic analysis of the ferroelectric ceramics specific heat AB - Knowing the thermal expansion of a material and the correlation analysis of the photoacoustic signals, it is possible to obtain the phase transition temperature and a qualitative curve of the specific heat at constant pressure (C-p) for ceramic materials. This analysis was applied to a BaTiO3 ferroelectric ceramic and a good agreement with previously published C-p versus temperature curves was obtained. Additionally, the phase transition temperature and the C-p curve of a samarium-doped lead titanate ceramic (Pb0.88Sm0.08TiO3) are presented. The phase transition temperature of the Pb0.88Sm0.08TiO3 obtained with this technique was corroborated with classical differential thermal analysis and dielectric permittivity measurements. (C) 2000 American Institute of Physics. [S0003-6951(00)03845-6] MH - Cuba MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000165069500049 L2 - THERMAL-PROPERTIES; TRANSITION SO - Applied Physics Letters 2000 ;77(19):3087-3089 348 UI - 16509 AU - Castaneda-Hernandez G AU - Verges J AU - Pichette V AU - Heroux L AU - Caille G AU - du Souich P AD - Univ Montreal, Fac Med, Dept Pharmacol, Montreal, PQ H3C 3J7, CanadaIPN, Ctr Invest & Estudios Avanzados, Dept Farmacol & Toxicol, Mexico City 07738, DF, Mexicodu Souich, P, Univ Montreal, Fac Med, Dept Pharmacol, CP 6128,Succ Ctrville, Montreal, PQ H3C 3J7, Canada TI - Input rate as a major determinant of furosemide pharmacodynamics: Influence of fluid replacement and hypoalbuminemia AB - To investigate how the response to a bolus and an infusion of furosemide is modulated by the rate of fluid replacement and by hypoalbuminemia, rabbits received 5 mg/kg of furosemide as a bolus or infused over 60 min, whereas diuresis was replaced with 13, 121, or 238 ml/h NaCl 0.9%/glucose 5% (50:50). Natriuretic and diuretic efficiencies were greater with the infusion than with the bolus of furosemide. Fluid replacement increased natriuretic and diuretic efficiency of furosemide bolus but only diuretic efficiency of furosemide infusion. Furosemide net fluid depletion reached a plateau when fluid replacement increased beyond 121 ml/h. Repeated plasmapheresis decreased plasma albumin by 30% (P < .05) and increased furosemide unbound fraction (P < .05). Compared with control rabbits, hypoalbuminemia decreased the natriuresis of the bolus (22.7 +/- 1.5-16.6 +/- 1.3 mmol, P < .05) but not that elicited by furosemide infusion (26.2 +/- 1.8 mmol). Given as a bolus, furosemide natriuretic and diuretic response as a function of its urinary rate of excretion exhibited an hyperbolic relationship, and after its infusion a clockwise hysteresis, denoting tolerance. Plasma renin activity was increased by the bolus and the infusion of furosemide, even in the presence of 121 ml/h of fluid replacement. It is concluded that: 1) the increase in natriuretic/diuretic efficiency of the bolus induced by fluid replacement is greater than when furosemide is infused, 2) furosemide net effect does not increase proportionally to fluid replacement, and 3) the infusion of furosemide prevents the hypoalbuminemia-induced decrease in response of furosemide given as a bolus MH - Canada MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0090-9556 UR - ISI:000085396400012 L2 - CONGESTIVE-HEART-FAILURE; CONTINUOUS-INFUSION; BOLUS INJECTION; DIURETIC EFFICIENCY; LOOP DIURETICS; FRUSEMIDE; PHARMACOKINETICS; DYNAMICS; CAPTOPRIL; NATRIURESIS SO - Drug Metabolism and Disposition 2000 ;28(3):323-328 349 UI - 14793 AU - Castano-Meneses G AU - Palacios-Vargas JG AU - Traser G AD - Univ Nacl Autonoma Mexico, Lab Ecol & Sistemist Microartropodos, Dept Biol, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Sopron, Inst Forest & Wood Protect, H-9401 Sopron, HungaryCastano-Meneses, G, Univ Nacl Autonoma Mexico, Lab Ecol & Sistemist Microartropodos, Dept Biol, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A new species of Metaphorura (Collembola : onychiuridae : tullberginae) from Hungary AB - A diagnosis of the genus Metaphorura is given, and a key for the known species is included. The new species, M. riozoi, from Hungary is described, illustrated with drawings and scanning electron microphotographs. Also Mesaphorura incisa Bonet is transferred to Metaphorura MH - Hungary MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000165605900008 L2 - collembola;Metaphorura;taxonomy;key SO - Annals of the Entomological Society of America 2000 ;93(6):1263-1266 350 UI - 14887 AU - Castelan-Ortega OA AU - Fawcett RH AU - rriaga-Jordan CM AU - Smith AJ AD - Univ Autonoma Estado Mexico, CICA, Inst Literario 100, Toluca 50000, MexicoUniv Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JG, Midlothian, ScotlandUniv Edinburgh, Ctr Trop Vet Med, Edinburgh EH8 9YL, Midlothian, ScotlandCastelan-Ortega, OA, Univ Autonoma Estado Mexico, CICA, Inst Literario 100, Toluca 50000, Mexico TI - Evaluation of the CERES-Maize model in simulating Campesino farmer yields in the highlands of central Mexico AB - A procedure was used to calibrate the DSSATv3 CERES-Maize (Zea mays) model and to evaluate its performance in simulating growth and development of maize using input data collected from campesino farmers instead of using data obtained from on-station experiments or from the literature. The problems encountered in the calibration process are illustrated, particularly the failure of the model to simulate the growth and development of local highland maize cultivars (HMC). It is argued that the low ambient temperatures to which HMCs are exposed in the Toluca Valley are responsible for this Failure, because HMCs respond differently to temperature and have a different optimum temperature range from temperate and tropical maize cultivars. It was concluded that the model needs to be adjusted to allow for consideration of the effects of constant low temperatures on the prediction of plane phenology and production, and partition of biomass in HMCs, since grain yield is not the main criterion used by smallholders when selecting maize cultivars MH - Mexico|Estado De Mexico MH - United Kingdom PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0014-4797 UR - ISI:000165368900006 L2 - TEMPERATURE RESPONSE; LEAF-APPEARANCE; PHOTOPERIOD; INITIATION; GROWTH SO - Experimental Agriculture 2000 ;36(4):479-500 351 UI - 15690 AU - Castellanos-Guzman AG AU - Reyes-Gomez J AU - Czank M AU - Kumar A AU - Singh G AU - Tiwari VS AU - Wadhawan VK AD - Univ Guadalajara, DIP CUCEL, Lab Invest Mat, Guadalajara 44281, Jalisco, MexicoUniv Colima, CICBAS, Colima 28000, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCtr Adv Technol, Crystal Growth Lab, Indore 452013, Madhya Pradesh, IndiaCastellanos-Guzman, AG, Univ Guadalajara, DIP CUCEL, Lab Invest Mat, Apdo Postal 2-638, Guadalajara 44281, Jalisco, Mexico TI - Calorimetric, optical, and anti-phase domain studies on the ferroelectric-ferroelastic Ni3B7O13Cl boracite AB - The isobaric molar heat capacity of Ni3B7O13Cl boracite at the ferroelectric 43m-mm2 phase transition is reported. Spontaneous birefringence measurements on single crystals of this composition From room temperature up to the transition temperature are also reported. It is shown by detailed analysis that antiphase domains are not to be expected in the cubic phase MH - Germany MH - India MH - Mexico|Colima MH - Mexico|Jalisco PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000088137900013 L2 - boracites;ferroelectricity;anti-phase domains;calorimetry transmission electron microscopy;spontaneous birefringence SO - Ferroelectrics 2000 ;237(1-4):393-400 352 UI - 16034 AU - Castello J AU - Carballo JL AD - Univ Barcelona, Dept Didact Ciencies Expt Mat, Barcelona 08035, SpainUNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Mazatlan, MexicoCastello, J, Univ Barcelona, Dept Didact Ciencies Expt Mat, Passeig Vall Hebron 171, Barcelona 08035, Spain TI - Two new species of Astacilla from Straits of Gibraltar, with a key to Iberian and North African species (Crustacea, Isopoda, Arcturidae) AB - Two new species of Astacilla Cordiner, 1793 are described from the Str-airs of Gibraltar. They are compared with other species of the genus known from that area. A. cingulata so. nov. is characterized by a dorsal pair of tubercles on the cephalon, which ale Followed by an uneven tubercle next to pereonite 1, one small tubercle in each of the first three pereonites, and two tubercles next to pereonite 4, separated by a waist near the end of this segment. A. paucisaetosa sp. nov. has a dorsal pair of tubercles and an uneven tubercle on the cephalon, a small tubercle on each of the first three pereonites, and two tubercles on pereonite 1. with the last one situated at the end of the segment and steeply inclined backwards. In addition to the description of the new species, a key to all Astacilla species found in the Iberian Peninsula and Northern Africa is given MH - Mexico|Sinaloa MH - Spain PB - STENSTRUP: OPHELIA PUBLICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0078-5326 UR - ISI:000086898200005 L2 - Isopoda;valvifera;Arcturidae;A-cingulata sp nov.;A-paucisaetosa sp nov.;Straits of Gibraltar;SPAIN; PENINSULA; VALVIFERA; COAST SO - Ophelia 2000 ;52(1):45-56 353 UI - 16521 AU - Castello JR AU - Olaso AS AU - Chao JJ AU - McCarthy JG AU - Molina F AD - Hosp Ramon y Cajal, Dept Plast Surg, E-28034 Madrid, SpainHosp Manuel Gra, Dept Plast Surg, Mexico City, DF, MexicoNYU Med Ctr, Inst Reconstruct Plast Surg, New York, NY 10016, USACastello, JR, Costa Brava,20 3R, Madrid 28034, Spain TI - Craniofacial shortening by contraction osteogenesis: An experimental model AB - Application of gradual external forces to correct craniofacial deformities challenges many procedures in conventional craniomaxillofacial surgery. Distraction osteogenesis is replacing traditional osteotomies for correction of patients with craniomaxillofacial deficiencies. However, the reverse concept, contraction osteogenesis, has yet to be established for patients with craniomaxillofacial excesses. The purpose of this investigation is to demonstrate the contraction osteogenesis phenomenon applied in a controlled animal model during the craniofacial growth period. Twenty-six 26-day-old rabbits were assigned to one of four groups: 0, control; 1, pin control (pin insertion); 2, no contraction (pins and contraction device application, without active contraction); and 3, contraction (pin insertion, contraction device application, and active contraction). An external fixator was placed across the incisive-maxillary suture, and the effects after 4.5 weeks of contraction at a rate of 0.5 mm twice a week were compared with control groups. The results were assessed by craniometric and cephalometric measurements and by histologic examination. Gross alterations were evident in the contraction group, characterized by midface anteroposterior shortening, maxillary regression, snout deviation, and anterior crossbite. Histologic examination of the contraction group demonstrated a significant increase in osteoblastic activity. Contraction osteogenesis is a new treatment concept in craniofacial development and may offer therapeutic opportunities for shortening skeletal structures without the need of osteotomies, thus taking advantage of the potential of craniofacial growth and remodeling MH - Mexico|Distrito Federal MH - Spain MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Surgery U5 - J;Article AV - English IS - 0032-1052 UR - ISI:000085332700021 L2 - CLEFT-LIP; DISTRACTION OSTEOGENESIS; MAXILLARY DISTRACTION; MIDFACE DISTRACTION; SKELETAL GROWTH; ANIMAL-MODELS; PALATE; OSTEOTOMIES; CHILDREN; INFANCY SO - Plastic and Reconstructive Surgery 2000 ;105(2):617-625 354 UI - 16559 AU - Castillejos M AU - Borja-Aburto VH AU - Dockery DW AU - Gold DR AU - Loomis D AD - Univ N Carolina, Sch Publ Hlth, Dept Epidemiol, Chapel Hill, NC 27599, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115, USACtr Nacl Salud Ambiental, Secretaria Salud, Metepec, MexicoUniv Autonoma Metropolitana Xochimilco, Mexico City, DF, MexicoLoomis, D, Univ N Carolina, Sch Publ Hlth, Dept Epidemiol, CB-7400, Chapel Hill, NC 27599 USA TI - Airborne coarse particles and mortality AB - Some recent epidemiologic studies suggest a stronger effect of fine particles (PM2.5) than of coarser particulate matter. To examine the support for such a differential effect, the authors conducted a daily time-series analysis of mortality in relation to measurements or PM2.5, PM10, and PM 10-2.5 in southwestern Mexico City in the years 1992-1995. A generalized linear model based on Poisson regression was used to control for weather and periodic cycles, and the average concentration of the previous five days was the index or particle exposure. The mean concentrations of PM2.5 and PM10 were 27.4 mu g m(-3) and 44.6 mu g m(-3), respectively, and the mean concentration of PM 10-2.5 was 17.2 mu g m(-3). PM10 was highly correlated with both the fine and coarse fractions, but PM2.5 and PM10-2.5 were rather weakly correlated with each other (correlation coefficient 0.52). All three particle size fractions were associated individually with mortality: a 10-mu g m(-3) increase in PM10 was associated with a 1.83% increase in total mortality (95% CI -0.01-2.96), and an equal increment in PM2.5 was associated with a 1.48% increase in deaths (95% CI 0.98-2.68%). The largest effect was observed for a 10-mu g m(-3) increment in PM10-2.5; mean daily mortality increased 4.07% for each 10 mu g m(-3) (95% CI 2.49-5.66%). The effect of coarse particles was stronger for respiratory diseases than for total mortality cardiovascular diseases, or other noninjury causes of death. These patterns persisted after adjustment for O-3 and NO2. When both PM2.5 and PM 10-2.5 were included simultaneously in the regression model, the effect of PM10-2.5 remained about 4% per 10 mu g m(-3) (95% CI 1.96-6.02%), while the effect of PM2.5 was virtually eliminated (0.18% change). These associations may be attributable to specific combustion or biogenic materials within the coarse particle mass. Understanding these relationships will require analyses of the composition of coarse particles. The findings also suggest a need to that the relative effects or coarse and fine particles on mortality should be examined in more cities with a wider variety of climates, population characteristics, and air pollutants MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 36 U4 - Toxicology U5 - J;Article AV - English IS - 0895-8378 UR - ISI:000085071600014 L2 - PARTICULATE AIR-POLLUTION; UNITED-STATES CITIES; FINE PARTICLES; MEXICO-CITY; TIME-SERIES SO - Inhalation Toxicology 2000 ;12():61-72 355 UI - 16112 AU - Castillo-Juarez H AU - Oltenacu PA AU - Blake RW AU - Mcculloch CE AU - Cienfuegos-Rivas EG AD - Cornell Univ, Dept Anim Sci, Ithaca, NY 14853, USACornell Univ, Biometr Unit, Ithaca, NY 14853, USAUniv Autonoma Tamaulipas, Tamaulipas, MexicoUniv Autonoma Metropolitana Xichimilco, Mexico City 04960, DF, MexicoOltenacu, PA, Cornell Univ, Dept Anim Sci, Ithaca, NY 14853, USA TI - Effect of herd environment on the genetic and phenotypic relationships among milk yield, conception rate, and somatic cell score in Holstein cattle AB - A total of 248,230 primiparous records of Holstein cows calving from 1987 to 1994 (daughters of 588 sires in 3042 herds) was used to evaluate potential genotype by environment interactions among mature equivalent milk yield, lactation mean somatic cell score, and conception rate at first service. Herds were classified into low and high environmental groups using three different criteria: standard deviation of herd mature equivalent milk yield, a combination of herd mature equivalent milk yield mean and standard deviation, and the herd mean of body weight at first calving divided by age at first calving. Genetic parameters were modeled by using multiple-trait linear mixed models and were fitted using the multiple-trait derivative-free software. Heritabilities for mature equivalent milk yield, lactation mean somatic cell score, and conception rate at first service were 0.221, 0.106, and 0.015 in low environment herds and 0.300, 0.093, and 0.009 in high environment herds, respectively. Genetic (and phenotypic) correlations between mature equivalent milk yield and lactation mean somatic cell score, mature equivalent milk yield and conception rate at first service, and lactation mean somatic cell score and conception rate at first service were 0.277, -0.417, and -0.209, (-0.049, -0.180, and -0.040) and 0.173, -0.318, and -0.144, (-0.087, -0.166, and -0.035) in low and high environment herds, respectively. The genetic correlations between pairs of traits were consistently smaller in high environment herds, suggesting that differences in management between the two environment levels lessened the antagonistic genetic association between the traits studied. A long-range plan for low environment herds should focus on improving the level of management, which would greatly reduce the unfavorable correlated changes in lactation mean somatic cell score and conception rate at first service associated with the genetic improvement of mature equivalent milk yield MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas MH - USA PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 37 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000086592100024 L2 - milk yield;conception rate;somatic cell score;management;DAIRY-CATTLE; HEALTH DISORDERS; UNITED-STATES; FERTILITY; MASTITIS; COWS; PARAMETERS; SELECTION; DISEASE; REPRODUCTION SO - Journal of Dairy Science 2000 ;83(4):807-814 356 UI - 16686 AU - Castillo E AU - Cobo A AU - Gomez-Nesterkin R AU - Hadi AS AD - Cornell Univ, Dept Stat Sci, Ithaca, NY 14853, USAUNAM, Fac Sci, Dept Math, Mexico City, DF, MexicoUniv Cantabria, Dept Appl Math & Computat Sci, E-39005 Santander, SpainHadi, AS, Cornell Univ, Dept Stat Sci, Ithaca, NY 14853, USA TI - A general framework for functional networks AB - In this paper, we introduce functional networks as a generalization and extension of the standard neural networks in the sense that every problem that can be solved by a neural network can also be formulated by a functional network. But, more importantly, we give examples of problems that cannot be solved using neural networks but can be naturally formulated using functional networks. Functional networks are defined as a collection of connected functional units on a set of nodes. A functional unit or neuron connects input nodes to output nodes. The values of the output nodes are calculated from the values of the input nodes by given functions of one or several arguments. The main differences with neural networks are that (a) the neural functions can be multivariate and can be different from neuron to neuron tin which case, no weights are necessary, because they subsume by the different functions) and (b) the neuron outputs can be coupled, that is, coincident. This mathematical model of functional networks parallels printed circuit boards with electronic components, thus giving an intuitive interpretation to functional networks and an interesting and natural additional application. The existence of functional units with common outputs leads to functional equations whose solution can lead to substantial simplification of the initial topology of the network and the neural functions involved. Two types of functional networks (the one-layer and serial functional networks) are discussed in detail. For the one-layer functional networks, a very simple simplification algorithm is given. For the serial functional networks, systems of functional equations are obtained. The methods are illustrated by several examples of applications. (C) 2000 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - Spain MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Hardware & Architecture;Operations Research & Management Science U5 - J;Article AV - English IS - 0028-3045 UR - ISI:000084389200006 L2 - functional equations;neural networks SO - Networks 2000 ;35(1):70-82 357 UI - 15541 AU - Castillo PA AU - Gonzalez-Martinez S AU - Tejero I AD - Univ Cantabria, Dept Water & Environm, Sch Civil Engn, E-39005 Santander, SpainNatl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoCastillo, PA, Univ Cantabria, Dept Water & Environm, Sch Civil Engn, Avda de los Castros S-N, E-39005 Santander, Spain TI - Observations during start-up of biological phosphorus removal in biofilm reactors AB - This research describes the start-up phase of Biological Phosphorus Removal (BPR) processes in two reactors. A Submerged Fix Bed Reactor (SFBR) working with a mixture of synthetic wastewater and domestic sewage and seeded with activated sludge coming from a BPR facility. A second reactor, a Biofilm Membrane Reactor (BMR), was fed with synthetic wastewater and seeded with a mixture of a pure culture of Acinetobacter lwoffi and fresh domestic sewage. It was found that Organic Loading Rates (OLR) above 5 gCOD/m(2) d do not guarantee the adequate Mean Cellular Retention Time (MCRT) for the development of Poly-P organisms. Anaerobic periods should not be short during start-up phase or facultative bacteria will efficiently compete for food and, eventually, facing long aerobic periods, the Poly-P organisms may not need the phosphate mechanism to survive short anaerobic periods. Even ii COD removal is observed during the anaerobic phase, further P accumulation during the aerobic phase will not be significant, unless the COD removal results in PHB formation. A loss in the BPR capacity of the Poly-P microorganisms was observed after seeding a reactor with active Poly-P organisms. The drop of BPR activity after seeding a reactor with active Poly-P organisms can be caused by the loss of genetic material due to the new environmental conditions and the new influent substrate MH - Mexico|Distrito Federal MH - Spain PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000088475900060 L2 - biofilm;membranes;start-up of BPR;biological phosphorus removal;nutrient removal;phosphate;sequencing batch reactor;SEQUENCING BATCH REACTOR; AEROBIC ACTIVATED-SLUDGE; ACETATE UPTAKE; POPULATION; PHOSPHATE; NITROGEN; GLYCOGEN SO - Water Science and Technology 2000 ;41(4-5):425-432 358 UI - 16159 AU - Castineiras A AU - Bermejo E AU - Valdes-Martinez J AU - Espinosa-Perez G AU - West DX AD - Illinois State Univ, Dept Chem, Normal, IL 61790, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Dept Quim Inorgan, Santiago De Compostela, SpainWest, DX, Illinois State Univ, Dept Chem, Normal, IL 61790, USA TI - Structural study of two N(3)-substituted thiosemicarbazide copper(II) complexes AB - The crystal structures of N(3)-methylthiosemicarbazide, bis{N(3)-methylthiosemicarbazide}copper(II) chloride and bis(hexamethyleneiminylthiosemicarbazide)copper(II) chloride are reported. Two forms of N(3)-methylthiosemicarbazide exist, which have different modes of intermolecular hydrogen bonding. Both copper(II) complexes are coordinated by the hydrazinic nitrogen and thione sulfur of the thiosemicarbazides in a cis arrangement. Further, for both complexes each of the NH hydrogens of the coordinated thiosemicarbazides interact with one of the chloride anions. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000086530500026 L2 - copper(II);thiosemicarbazide;hexamethyleneimine;crystal;structure;RAY CRYSTAL-STRUCTURE SO - Journal of Molecular Structure 2000 ;522():271-278 359 UI - 14553 AU - Castro-Fernandez C AU - Olivares A AU - Soderlund D AU - Lopez-Alvarenga JC AU - Zambrano E AU - Veldhuis JD AU - Ulloa-Aguirre A AU - Mendez JP AD - Inst Mexicano Seguro Social, Res Unit Dev Biol, Mexico City, DF, MexicoInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Virginia, Hlth Sci Ctr, Dept Internal Med, Charlottesville, VA 22908, USAUlloa-Aguirre, A, Inst Mexicano Seguro Social, Ctr Med Nacl Siglo XXI, Unidad Invest Med & Biol Desarrollo, Coordinac Invest Med, Ave Cuauhtemoc 330,Apdo Postal 73-032,Col Doctore, Mexico City 06725, DF, Mexico TI - A preponderance of circulating basic isoforms is associated with decreased plasma half-life and biological to immunological ratio of gonadotropin-releasing hormone-releasable luteinizing hormone obese men AB - Hormonal abnormalities of the reproductive axis have been described in obesity. In men, extreme obesity is associated with low serum testosterone (T) and high estrogen [estrone and estradiol (E-2)] levels. As changes in the sex steroid milieu may profoundly affect the carbohydrate heterogeneity and thus some of the biological and physicochemical properties of the LH molecule, we analyzed the relative distribution of LH isoforms circulating under baseline conditions (endogenous GnRH drive) as well as the forms discharged by exogenous GnRH stimulation from putative acutely releasable and reserve pituitary pools in overweight men. Secondarily, we determined the impact of the changes in LH terminal glycosylation on the in vitro bioactivity and endogenous half-life of the gonadotropin. Seven obese subjects with body mass indexes ranging from 35.7-45.5 kg/m(2) and seven normal men with body mass indexes from 22.5-24.2 kg/m(2) underwent blood sampling at 10- min intervals for a total of 10 h before and after the iv administration of 10 and 90 mug GnRH. Basally released and exogenous GnRH-stimulated serum LH isoforms were separated by preparative chromatofocusing and identified by RIA of eluent fractions. Serum pools of successive samples collected across 2-h intervals (five serum pools per subject) containing LH released under baseline and exogenous GnRH-stimulated conditions were tested for bioactivity employing a homologous in vitro bioassay. Mean serum T and E-2 levels were significantly lower and higher, respectively, in the obese men than in the control group [serum T, 13.5 +/- 2.4 vs. 19.4 +/- 1.4 nmol/L (mean +/- SEM; P = 0.01); serum E-2, 0.184 +/- 0.01 vs. 0.153 +/- 0.01 nmol/L (P < 0.05)]. Mean baseline serum LH levels were similar in obese subjects and normal controls (13.3 +/- 1.3 and 12.2 +/- 12 IU/L). Although multiple parameter deconvolution of the exogenous GnRH-induced LH pulses revealed that the magnitude of the pituitary response in terms of secretory burst mass, secretory amplitude, and half-duration of the LH pulses was similar in obese and control subjects, the apparent endogenous half-life of LH was significantly (P < 0.05) shorter in the obese group (98 +/- 11 min) than in the normal controls (132 +/- 10 min). Under all conditions studied, the relative abundance of basic isoforms (those with pH greater than or equal to 7.0) was significantly (P < 0.05) increased in the obese subjects compared with the controls (percentages of LH immunoactivity recovered at pH 7.0: obese subjects, 34-57%; normal controls, 22-46%). The biological to immunological ratio of LH released in baseline and low dose (10 mug) GnRH-stimulated conditions were similar in obese subjects and normal controls, whereas LH released by obese subjects in response to the high (90 mug) GnRH dose exhibited significantly lower ratios than those detected in normal individuals (0.62 +/- 0.07 and 0.45 +/- 0.09 vs. 1.01 +/- 0.10 and 0.81 +/- 0.09 for LH released within 10-120 min and 130-240 min after GnRH administration in obese and controls, respectively; P < 0.05). Collectively, these results indicate that the altered sex steroid hormone milieu characteristic of extreme obesity provokes a selective increase in the release of less acidic LH isoforms, which may potentially modify the intensity and duration of the blood LH signal delivered to the gonad. Altered glycosylation of LH may therefore represent an additional mechanism modulating the hypogonadal state prevailing in morbid obesity MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 17 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000166277800029 L2 - FOLLICLE-STIMULATING-HORMONE; RIBONUCLEIC-ACID LEVELS; NORMAL MENSTRUAL-CYCLE; DECONVOLUTION ANALYSIS; SERUM GONADOTROPINS; BINDING-GLOBULIN; HYPOTHYROID MICE; IN-VITRO; TESTOSTERONE; SECRETION SO - Journal of Clinical Endocrinology and Metabolism 2000 ;85(12):4603-4610 360 UI - 14991 AU - Castro-Rodriguez R AU - Sosa V AU - Oliva AI AU - Iribarren A AU - Pena JL AU - Caballero-Briones F AD - IPN Merida, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, MexicoUniv La Habana, Inst Mat & Reactivos, DIEES, La Habana 10400, CubaIPN, CICATA, ALTAMIRA, Altamira Tamaulipas 89600, SpainCastro-Rodriguez, R, IPN Merida, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, Mexico TI - Strain gradients in polycrystalline CdS thin films AB - The strain gradient through an 800-nm thick CdS thin him, deposited on an ITO substrate by chemical bath deposition (CBD) has been analyzed by using grazing incidence X-ray diffraction (GIXD). The main X-ray diffraction peak found in the CdS him was separated in the cubic-(111) and hexagonal-(002) reflections by a multi-Gaussian fit. We measured the d-spacings of the h-(002) and c-(111) phases mixed in the CdS film as a function of the penetration depth of the incidence X-ray beam. Afterwards, we calculated their respective strain. Both the c-(111) and h-(002) strain tend gradually to reach a top value from the surface to the depth of the films. These strain magnitudes were correlated with the misfit parameter between the CdS [c-(111) and h-(002)] phases and the ITO substrate. From the experimental results we concluded that strain is therefore induced by the mismatch and by other effects, as grain size of the CdS him, and ITO substrate roughness. (C) 2000 Elsevier Science S.A. All rights reserved MH - Cuba MH - Mexico|Yucatan MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900003 L2 - cadmium sulfide;X-ray diffraction;TRANSITION SO - Thin Solid Films 2000 ;373(1-2):6-9 361 UI - 14992 AU - Castro-Rodriguez R AU - Hernandez MP AU - Zapata-Torres M AU - Pena JL AD - IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, MexicoUniv La Havana, IMRE, La Habana 10400, CubaIPN, ALTAMIRA, CICATA, Altamira 89600, SpainCastro-Rodriguez, R, IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, Mexico TI - (CdTe)(1-x)(In2Te3)(x) pseudo-binary in polycrystalline CdTe-In films AB - Polycrystalline CdTe-In films were prepared using close-spaced vapor transport technique combined with free evaporation (CSVT-FE), and the stoichiometry and structural properties were investigated. Auger electron spectroscopy (AES) was used to quantify the stoichiometry of the indium concentration in the films which increased according to the rise of temperature of the In source. X-Ray diffraction analysis allowed to identify the CdTe (alpha -phase) in all films, together with the CdIn2Te4 (beta -phase) in the films grown at the highest temperatures of the In source. For low In concentration films, the lattice parameter decreased linearly with the molar percent of In2Te3 in CdTe (below 5 mol%). This behavior corroborated the presence of the solid solution. (C) 2000 Elsevier Science S.A. All rights reserved MH - Cuba MH - Mexico|Yucatan MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900007 L2 - cadmium telluride;evaporation;lattice parameters;physical vapor;semiconductors;X-ray diffraction;VAPOR TRANSPORT TECHNIQUE; FREE EVAPORATION; CDIN2TE4 SO - Thin Solid Films 2000 ;373(1-2):23-27 362 UI - 14853 AU - Castro E AU - Edland SD AU - Lee L AU - Ogburn CE AU - Deeb SS AU - Brown G AU - Panduro A AU - Riestra R AU - Tilvis R AU - Louhija J AU - Penttinen R AU - Erkkola R AU - Wang L AU - Martin GM AU - Oshima J AD - Univ Washington, Dept Pathol, Seattle, WA 98195, USAUniv Washington, Dept Epidemiol, Seattle, WA 98195, USAUniv Washington, Dept Genet, Seattle, WA 98195, USAUniv Washington, Dept Med, Seattle, WA 98195, USAUniv Guadalajara, Guadalajara Civ Hosp, Dept Mol Biol Med, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Guadalajara Civ Hosp, Dept Neurol, Guadalajara 44430, Jalisco, MexicoUniv Helsinki, Dept Med, Helsinki, FinlandUniv Turku, Dept Med Biochem, Turku, FinlandUniv Turku, Dept Obstet & Gynecol, Turku, FinlandOshima, J, Univ Washington, Dept Pathol, 1959 NE Pacific Ave,Box 357470, Seattle, WA 98195 USA TI - Polymorphisms at the Werner locus: II. 1074Leu/Phe, 1367Cys/Arg, longevity, and atherosclerosis AB - Werner syndrome (WS) is a progeroid syndrome caused by autosomal recessive null mutations at the WRN locus. The WRN gene encodes a nuclear protein of 180 kD that contains both exonuclease and helicase domains. WS patients develop various forms of arteriosclerosis, particularly atherosclerosis, and medial calcinosis, The most common cause of death in Caucasian subjects with WS is myocardial infarction, Previous studies have identified specific polymorphisms within WRN that may modulate the risk of atherosclerosis. Population studies of the 1074Leu/Phe and 1367Cys/Arg polymorphisms were undertaken to evaluate the role of WRN in atherogenesis, Frequencies of the 1074Leu/Phe polymorphisms in Finnish and Mexican populations revealed an age-dependent decline of 1074Phe/Phe genotype. In Mexican newborns, but not in Finnish newborns, the 1074Leu/Phe and 1367Cys/Arg polymorphisms were in linkage disequilibrium, Among coronary artery disease subjects, there was a tendency for the 1074Phe allele to be associated with coronary stenosis in a gene dose-dependent manner. Furthermore, the 1367Arg/Arg genotype predicted a lower degree of coronary artery occlusion, as measured by NV50, when compared to the 1367Cys/Cys or 1367Cys/Arg genotypes, However, these tendencies did not achieve statistical significance. Samples from Mexican patients with ischemic stroke showed a trend of haplotype frequencies different from that in a control group of Mexican adults. These data support the hypothesis that WRN may mediate not only WS, but may also modulate more common age-related disorders and, perhaps, a basic aging process, (C) 2000 Wiley-Liss, Inc MH - Finland MH - Mexico|Jalisco MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 27 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000165498700014 L2 - aging;RecQ;haplotype;Finnish;Mexican;LYMPHOBLASTOID CELL-LINES; LIPOPROTEIN-LIPASE GENE; CORONARY-ARTERY DISEASE; SYNDROME PROTEIN; DNA HELICASE; 4-NITROQUINOLINE 1-OXIDE; NUCLEAR-LOCALIZATION; TRANSCRIPTION; ASSOCIATION; POPULATION SO - American Journal of Medical Genetics 2000 ;95(4):374-380 363 UI - 15770 AU - Castro E AU - Foster J AU - Gindzin Y AU - Cabrera G AU - Goldman C AU - Macouzet F AD - Mil Hosp Mexico, Mexico City, DF, MexicoCleveland Clin Fdn, Dept Cellular Biol, Cleveland, OH 44195, USACole Eye Inst, Opthalm Plast Dept, CCF, Cleveland, OH, USA TI - An in vivo animal model of human retinoblastoma MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246704244 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S787-S787 364 UI - 15052 AU - Castro RR AU - Trojani L AU - Monachesi G AU - Mucciarelli M AU - Cattaneo M AD - Ctr Invest Cient & Educ Super Ensenada, Div Ciencias Tierra, Ensenada, Baja California, MexicoOsservatorio Geofis Sperimentale, I-62100 Macerata, ItalyUniv Basilicata, DISGG, I-85100 Potenza, ItalyIst Nazl Geofis, I-00143 Rome, ItalyCastro, RR, CICESE, Div Ciencias Tierra, POB 434843, San Diego, CA 92143 USA TI - The spectral decay parameter kappa in the region of Umbria-Marche, Italy AB - We analyze 44 earthquakes (M2.1.-4.1) recorded by the Marchesan Seismograph Network during the 1997 Umbria-Marche sequence. We calculated the spectral decay parameter kappa [Anderson and Hough, 1984] using 33 events (M2.2-4.1) and f(c) < 10 Hz located in the middle of the rupture are:a. Although the source-station paths have approximately the same distance (+/-2.5 km) and azimuth for a given site, the estimates of kappa show great variability at all the stations. Even events with small standard deviation on the estimate of kappa can have a value 2-3 times different from that estimated for other events located within the 2.5 km. This observation suggests that the attenuation near the source can change significantly in a small distance range. We separated source and path effects by performing a generalized spectral inversion. We dismissed events with source functions having corner frequencies between 10 and 20 Hz, the frequency band where kappa was estimated. With the best estimates of kappa we calculated the mean for each site, and we observed an apparent azimuthal variation of the attenuation. We used the observed changes of kappa to estimate the near-source attenuation, finding that in a distance of 2 km, Q may vary between 16 and 52, depending on the source-station direction. The results of the analysis suggest that the most likely cause of the observed variability of kappa is the spatial variation of Q near the seismogenic zone MH - USA MH - Italy MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000089895700032 L2 - SAN-ANDREAS FAULT; 2.5 KM DEPTH; LOCAL EARTHQUAKES; SITE-RESPONSE; TECTONIC IMPLICATIONS; SOUTHERN CALIFORNIA; WAVE ATTENUATION; SUBDUCTION ZONE; CAJON-PASS; CODA WAVES SO - Journal of Geophysical Research-Solid Earth 2000 ;105(B10):23811-23823 365 UI - 14831 AU - Castronuovo G AU - Elia V AU - Perez-Casas S AU - Velleca F AD - Univ Naples Federico II, Dept Chem, I-80134 Naples, ItalyUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoCastronuovo, G, Univ Naples Federico II, Dept Chem, Via Mezzocannone 4, I-80134 Naples, Italy TI - Efficiency of hydroxyl groups in promoting hydrophobic interactions. A calorimetric study of ternary aqueous solutions of alkan-1-ols and alkane-m,n-diols AB - Heats of dilution of ternary aqueous solutions containing alkan-1-ols and alkane-1,2-diols or alkane-alpha,omega -diols have been determined at 298.15 K by flow microcalorimetry. The pairwise interaction coefficients of the virial expansion of the excess enthalpies were evaluated and compared to those formerly obtained for binary aqueous solutions of alkan-m-ols or alkane-m,n-diols. The results were interpreted using the "preferential configuration" model, namely in terms of preferential interactions between hydrophilic domains and of repulsive interactions between hydrophobic and hydrophilic domains. Hydroxyl groups present a different efficiency in promoting hydrophobic interactions in dependence of their number and position in the interacting molecules. (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0167-7322 UR - ISI:000165409700005 L2 - ALPHA-AMINO-ACIDS; 298.15 K; CHIRAL RECOGNITION; FUNCTIONAL-GROUPS; MOLECULAR RECOGNITION; GEOMETRIC ISOMERISM; EXCESS-ENTHALPIES; MODEL; UREA; 25-DEGREES-C SO - Journal of Molecular Liquids 2000 ;88(2-3):163-173 366 UI - 15705 AU - Cataldo M AU - Cruz N AU - del Campo S AU - Garcia A AD - Univ Bio Bio, Fac Ciencias, Dept Fis, Concepcion, ChileUniv Santiago Chile, Fac Ciencia, Dept Fis, Santiago, ChileUniv Catolica VAlparaiso, Fac Ciencias Basicas & Matemat, Inst Fis, Valparaiso, ChileInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoCataldo, M, Univ Bio Bio, Fac Ciencias, Dept Fis, Avda Collo 1202,Casilla 5-C, Concepcion, Chile TI - (2+1)-dimensional black hole with Coulomb-like field AB - A (2 + 1)-static black hole solution with a nonlinear electric field is derived. The source to the Einstein equations is a nonlinear electrodynamics, satisfying the weak energy conditions, and it is such that the energy momentum tensor is traceless. The obtained solution is singular at the origin of coordinates. The derived electric field E(r) is given by E(r) = q/r(2), thus it has the Coulomb form of a point charge in the Minkowski spacetime. This solution describes charged (anti)-de Sitter spaces. An interesting asymptotically flat solution arises for Lambda = 0. (C) 2000 Elsevier Science B.V. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000087960300022 L2 - 2+1 dimensions;non-linear black hole;DUAL MAXWELL FIELD; NONLINEAR-ELECTRODYNAMICS; EINSTEIN; ENERGY SO - Physics Letters B 2000 ;484(1-2):154-159 367 UI - 16153 AU - Cataldo M AU - Garcia A AD - Univ Bio Bio, Fac Ciencias, Dept Fis, Concepcion, ChileUniv Santiago Chile, Fac Ciencia, Dept Fis, Santiago, ChileInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoCataldo, M, Univ Bio Bio, Fac Ciencias, Dept Fis, Avda Collao 1202,Casilla 5-C, Concepcion, Chile TI - Regular (2+1)-dimensional black holes within nonlinear electrodynamics AB - (2+1)-regular static black hole solutions with a nonlinear electric field are derived. The source to the Einstein equations is an energy momentum tensor of nonlinear electrodynamics, which satisfies the weak energy conditions and in the weak field limit becomes the (2+1)-Maxwell field tensor. The derived class of solutions is regular: the metric, curvature invariants, and electric field are regular everywhere. The metric becomes, for a vanishing parameter, the (2+1)-static charged BTZ solution. A general procedure to derive solutions for the static BTZ (2+1)spacetime for any nonlinear Lagrangian depending on the electric field is formulated; for relevant electric fields one requires the fulfillment of the weak energy conditions MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000086554100030 L2 - DUALITY ROTATIONS; STRINGS SO - Physical Review D 2000 ;6108(8): 368 UI - 14548 AU - Cavazos-Cadena R AU - Feinberg EA AU - Montes-De-Oca R AD - Univ Autonoma Agr Antonio Narro, Dept Estadist & Calculo, Saltillo 25315, Coahuila, MexicoSUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794, USAUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoCavazos-Cadena, R, Univ Autonoma Agr Antonio Narro, Dept Estadist & Calculo, Saltillo 25315, Coahuila, Mexico TI - A note on the existence of optimal policies in total reward dynamic programs with compact action sets AB - This work deals with Markov decision processes (MDPs) with expected total rewards, discrete state spaces, and compact action sets. Within this framework, a question on the existence of optimal stationary policies, formulated by Puterman (1994, p. 326), is considered. The paper concerns the possibility of obtaining an affirmative answer when additional assumptions are imposed on the decision model. Three conditions ensuring the existence of average optimal stationary policies in finite-state MDPs are analyzed, and it is shown that only the so-called structural continuity condition is a natural sufficient assumption under which the existence of total-reward optimal stationary policies can be guaranteed. In particular, this existence result holds for unichain MDPs with finite state space, but an example is provided to show that this general conclusion does not have an extension to the denumerable state space case MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA PB - LINTHICUM HTS: INST OPERATIONS RESEARCH MANAGEMENT SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 0364-765X UR - ISI:000166210800008 L2 - Markov decision processes;finite state space;compact action sets;expected total-reward criterion;optimal stationary policies;structural continuity SO - Mathematics of Operations Research 2000 ;25(4):657-666 369 UI - 14926 AU - Cavazos-Cadena R AU - Fernandez-Gaucherand E AD - Univ Autonoma Agraria Antonio Narro, Dept Estadist & Calculo, Saltillo 25315, Coahuila, MexicoUniv Cincinnati, Dept Elect & Comp Engn & Comp Sci, Cincinnati, OH 45221, USACavazos-Cadena, R, Univ Autonoma Agraria Antonio Narro, Dept Estadist & Calculo, Saltillo 25315, Coahuila, Mexico TI - The vanishing discount approach in Markov chains with risk-sensitive criteria AB - In this paper stochastic dynamic systems are studied, modeled by a countable state space Markov cost/reward chain, satisfying a Lyapunov-type stability condition. For an infinite planning horizon, risk-sensitive (exponential) discounted and average cost criteria are considered. The main contribution is the development of a vanishing discount approach to relate the discounted criterion problem with the average criterion one, as the discount factor increases to one, i,e., no discounting. In comparison to the well-established risk-neutral case, our results are novel and reveal several fundamental and surprising differences. For example, the limit of the (normalized) discounted costs, as the discount vanishes, is not equal to the average cost, but rather equal to an arithmetic mean of the average cost over a range of values for the risk sensitivity coefficient. Other significant contributions made in this paper are the use of convex analytic arguments to obtain appropriately convergent sequences and a verification theorem for the case of unbounded solutions to the average cost Poisson equation arising in the risk-sensitive case. Also of importance is the fact that our developments are very much self-contained and employ only basic probabilistic and analysis principles MH - Mexico|Coahuila MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000165173400002 L2 - exponential Lyapunov stability condition;exponential utility function;Markov cost/reward chains;risk-sensitive average Poisson equation;risk-sensitive discounted and average criteria;vanishing discount approach;AVERAGE COST CRITERION SO - Ieee Transactions on Automatic Control 2000 ;45(10):1800-1816 370 UI - 14637 AU - Cayrol P AU - Kergoat L AU - Moulin S AU - Dedieu G AU - Chehbouni A AD - Univ Toulouse 3, Ctr Etud Spatiale Biosphere, CNES, CNRS, Toulouse, FranceUniv Toulouse 3, Lab Ecol Terr, CNRS, Toulouse, FranceInst Rech Dev, IMADES, Hermosillo, Sonora, MexicoCayrol, P, CESBIO, 18 Av E Belin,BPI 2801, F-31401 Toulouse 4, France TI - Calibrating a coupled SVAT-vegetation growth model with remotely sensed reflectance and surface temperature - A case study for the HAPEX-Sahel grassland sites AB - Models simulating the seasonal growth of vegetation have been recently coupled to soil-vegetation-atmosphere transfer schemes (SVATS). Such coupled vegetation-SVATS models (V-S) account for changes of the vegetation leaf area index (LAI) over time. One problem faced by V-S models is the high number of parameters that are required to simulate different sites or large areas. Therefore, efficient calibration procedures are needed. This study describes an attempt to calibrate a V-S model with satellite [Advanced Very High Resolution Radiometer (AVHRR)] data in the shortwave and longwave domains. A V-S model is described using ground data collected over three semiarid grassland sites during the Hydrological Atmospheric Pilot Experiment (HAPEX)-Sahel experiment. The effect of calibrating model parameters with time series of normalized difference vegetation index (NDVI) and thermal infrared (TIR) data is assessed by examining the simulated latent heat flux (LE) and LAI for a suite of calibration experiments. A sensitivity analysis showed that the parameters related to plant growth vigor and to soil evaporative resistance were the best candidates for calibration. The NDVI and TIR time series were used to calibrate these parameters, both independently and simultaneously, to assess their synergy. Ground-based, airborne, and satellite sensor (AVHRR) data were successively investigated. Both airborne and AVHRR NDVI data could be used to constrain the vegetation growth vigor. These calibrations significantly improved the simulation of the LAI and LE (rmse decreased by 21% for LE), and the site-to-site variability was greatly enhanced. The soil resistance could also be calibrated with ground-based TIR data, but the effect on the simulated variables was small. Although both NDVI and ground-based TIR data were suitable to constrain the V-S model, the synergy between the two wavelengths was not clearly established. Last, satellite TIR data from the AVHRR proved unsuitable for model calibration. Indeed, the AVHRR surface temperature values were systematically lower than both ground-based data and model outputs. The authors conclude that the calibration of a vegetation-SVAT model with shortwave AVHRR time series can be used to scale the energy and water fluxes up to the regional scale MH - France MH - Mexico|Sonora PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0894-8763 UR - ISI:000166040000034 L2 - MULTISPECTRAL SATELLITE DATA; ATMOSPHERIC MESOSCALE MODEL; DATA ASSIMILATION; SOIL-MOISTURE; AVHRR DATA; HEATING RATES; GLOBAL-SCALE; SPARSE CROPS; WETNESS DATA; FIELD SO - Journal of Applied Meteorology 2000 ;39(12):2452-2472 371 UI - 14809 AU - Cayrol P AU - Chehbouni A AU - Kergoat L AU - Dedieu G AU - Mordelet P AU - Nouvellon Y AD - CESBIO, CNRS, CNES, UPS, F-31401 Toulouse 4, FranceIRD, IMADES, Hermosillo 83190, Sonora, MexicoLET, CNRS, UPS, F-31405 Toulouse, FranceUSDA ARS, Tucson, AZ 85719, USACayrol, P, CESBIO, CNRS, CNES, UPS, 18 Av E Belin,Bpi 2801, F-31401 Toulouse 4, France TI - Grassland modeling and monitoring with SPOT-4 VEGETATION instrument during the 1997-1999 SALSA experiment AB - A coupled vegetation growth and soil-vegetation-atmosphere transfer (SVAT) model is used in conjunction with data collected in the course of the SALSA program during the 1997-1999 growing seasons in Mexico. The objective is to provide insights on the interactions between grassland dynamics and water and energy budgets. These three years exhibit drastically different precipitation regimes and thus different vegetation growth. The result of the coupled model showed that for the 3 years, the observed seasonal variation of plant biomass, leaf area index (LAI) are well reproduced by the model. It is also shown that the model simulations of soil moisture, radiative surface temperature and surface fluxes compared fairly well with the observations. Reflectance data in the red, near infrared, and short wave infrared (SWIR, 1600 nm) bands measured by the VEGETATION sensor onboard SPOT-4 were corrected from atmospheric and directional effects and compared to the observed biomass and LAI during the 1998-1999 seasons. The results of this 'ground to satellite' approach established that the biomass and LAI are linearly related to the satellite reflectances (RED and SWIR), and to vegetation indices (NDVI and SWVI, which is a SWIR-based NDVI). The SWIR and SWVI sensitivity to the amount of plant tissues were similar to the classical RED and NDVI sensitivity, for LAT ranging from 0 and 0.8 m(2) m(-2) and biomass ranging from 0 to 120 g DM m(-2) Finally, LAI values simulated by the vegetation model were fed into a canopy radiative transfer scheme (a 'model to satellite' approach). Using two leaf optical properties datasets, the computed RED, NIR and SWIR reflectances and vegetation indices (NDVI and SWVI) compared reasonably well with the VEGETATION observations in 1998 and 1999, except for the NIR band and during the senescence period, when the leaf optical properties present a larger uncertainty. We conclude that a physically-sound linkage between the vegetation model and the satellite can be used for red to short wave infrared domain over these grasslands. These different results represent an important step toward using new generation satellite data to control and validate model's simulations at regional scale. (C) 2000 Published by Elsevier Science B.V MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800008 L2 - SVAT;grassland;semi-arid;VEGETATION;SWIR;SALSA;CANOPY REFLECTANCE; SOIL-MOISTURE; SURFACE HEAT; LEAF; TEMPERATURE; CLIMATE; FIELD; LAYER; INCLUSION SO - Agricultural and Forest Meteorology 2000 ;105(1-3):91-115 372 UI - 16557 AU - Cedillo A AU - Chattaraj PK AU - Parr RG AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Villa Coapa 14391, DF, MexicoIndian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, IndiaUniv N Carolina, Dept Chem, Chapel Hill, NC 27599, USAParr, RG, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Ap Postal 86-219, Villa Coapa 14391, DF, Mexico TI - Atoms-in-molecules partitioning of a molecular density AB - An atoms-in-a-molecule partitioning procedure, based on the minimization of the molecular grand potential, is presented. The fragments in the molecule are obtained from a set of integral operators that project the total density into its components, with the sum of the fragment densities equal to the molecular density. The hard and soft acids and bases (HSAB) principle is analyzed generalizing a previous proof to the case where the external potentials change. (C) 2000 John Wiley & Sons, Inc MH - India MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000085144900038 L2 - atom-in-molecule;grand potential;HSAB principle;MAXIMUM HARDNESS; FUNCTIONAL THEORY; PRINCIPLE; SOFTNESS; SYSTEMS; MODEL; IONS SO - International Journal of Quantum Chemistry 2000 ;77(1):403-407 373 UI - 14927 AU - Celikovsky S AD - Acad Sci Czech Republ, Inst Informat Theory & Automat, Prague 18208 8, Czech RepublicCelikovsky, S, IPN, CINVESTAV, Unidad Guadalajara, Guadalajara, Jalisco, Mexico TI - Local stabilization and controllability of a class of nontriangular nonlinear systems AB - This paper considers the problems of local asymptotic stabilization using continuous static state feedback (LCFS) and small time local controllability (STLC) of single-input nonlinear systems. A specific class of nontriangular systems, called the essentially triangular form (ETF), is introduced. For this class of systems sufficient conditions for LCFS and necessary and sufficient conditions for STLC are obtained. In particular, it is shown that STLC implies LCFS. A motivating physical example of the ETF system is presented MH - Czech Republic MH - Mexico|Jalisco PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000165173400016 L2 - controllability;nonlinear nontriangular systems;stabilization SO - Ieee Transactions on Automatic Control 2000 ;45(10):1909-1913 374 UI - 15254 AU - Ceniceros-Gomez AE AU - Barba-Behrens N AU - Quiroz-Castro ME AU - Bernes S AU - Noth H AU - Castillo-Blum SE AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, USAI, Mexico City 04510, DF, MexicoUniv Munich, Inst Inorgan Chem, D-81377 Munich, GermanyCastillo-Blum, SE, Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Synthesis, X-ray and spectroscopic characterisation of chromium(III) coordination compounds with benzimidazolic ligands AB - The syntheses and characterisation of chromium(III) complexes with tris(2-benzimidazolylmethyl)amine (ntb), 2-guanidinobenzimidazole (2gb), 2,6-bis(2-benzimidazolyl)pyridine (bbimpy) and 2-(2-pyridyl)benzimidazole (2pb), of composition [Cr(ntb)Cl-2]Cl . 4.5H(2)O (1), [Cr(2gb)(3)]Cl[ZnCl4]. CH3OH (2), [Cr(2gb)(3)]Cl-3. 4H(2)O (3), [Cr-2(2gb)(4)(mu-OH)(2)](ClO4)(4). 5H(2)O (4), [Cr(b-bimpy)Cl-3] (5) and [Cr(2pb)(2)Cl-2]Cl . C2H5OH . 0.5H(2)O (6) are presented. The compounds are obtained from Cr(III) in alcoholic solution, or a Cr(II) aqueous acidic solution. The latter were carried out under air-free conditions. The reaction of 2gb with Cr(II) in aqueous solution yielded a dinuclear compound. The X-ray crystal structures of 1 and 4 are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000089272400009 L2 - chromium(III) complexes;tris(2-benzimidazolylmethyl)amine;2-guanidinobenzimidazole;2,6-bis(2-benzimidazolyl)pyridine;2-(2-pyridyl)benzimidazole;crystal structures;COBALT(III) COMPLEXES; PHYSICAL-PROPERTIES; CRYSTAL-STRUCTURES; PERCHLORATE; 2-AMINOMETHYLBENZIMIDAZOLE; COPPER(II); CHEMISTRY; BEHAVIOR; ZINC(II); KINETICS SO - Polyhedron 2000 ;19(15):1821-1827 375 UI - 15726 AU - Ceniceros-Gomez AE AU - Barba-Behrens N AU - Bernes S AU - Noth H AU - Castillo-Blum SE AD - Univ Nacl Autonoma Mexico, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, USAI, Mexico City 04510, DF, MexicoUniv Munich, Inst Inorgan Chem, D-81377 Munich, GermanyCastillo-Blum, SE, Univ Nacl Autonoma Mexico, Dept Quim Inorgan, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Synthesis, X-ray and NMR characterisation of cobalt(III) coordination compounds with 2-guanidinobenzimidazole AB - The synthesis and characterisation of cobalt(III) coordination compounds with 2-guanidinobenzimidazole (2gb), namely [Co(2gb)(3)]Cl-2(NO3). H2O, [Co(2gb)(3)]Cl(NO3)(2). H2O, [Co(2gb)(3)]Cl-3. 3H(2)O and [Co(2gb)(3)](Cl3CCOO)(3). H2O, are presented. The compounds with the 2-guanidinobenzimidazole ligand were synthesised from [Co(NH3)(4)CO3]NO3 or Na-3[Co(CO3)(3)]. 3H(2)O or from cobalt(II) chloride. H-1, C-13 and 2D NMR spectra together with the X-ray diffraction data for the distorted octahedral [Co(2gb)(3)](3+) cation showed that only the mer isomer was formed. (C) 2000 Elsevier Science S.A. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000087938600011 L2 - crystal structures;cobalt complexes;benzimidazole complexes;COMPLEXES; 2-AMINOMETHYLBENZIMIDAZOLE; NICKEL(II); COPPER(II); CHEMISTRY; BEHAVIOR SO - Inorganica Chimica Acta 2000 ;304(2):230-236 376 UI - 15488 AU - Centurion D AU - Sanchez-Lopez A AU - Ortiz MI AU - De Vries P AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacol, Mexico City 14000, DF, MexicoErasmus Univ, Fac Med & Hlth Sci, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacol, Apdo Postal 22026, Mexico City 14000, DF, Mexico TI - Mediation of 5-HT-induced internal carotid vasodilatation in GR127935-and ritanserin-pretreated dogs by 5-HT7 receptors AB - The vasoconstrictor effects of 5-hydroxytryptamine (5-HT) in the internal carotid bed of anaesthetised dogs with bilateral vagosympathectomy are mainly mediated by both 5-HT1B and 5-HT2 receptors. The blockade of this vasoconstrictor effect of 5-HT by the combined use of the antagonists, GR127935 (5-HT1B/1D) and ritanserin (5-HT2,), unmasks a dose-dependent vasodilator effect of 5-HT, but not of sumatriptan. Therefore, the present study set out to analyse the pharmacological profile of this vasodilator 5-HT receptor in the internal carotid bed of vagosympathectomized dogs systematically pretreated with intravenous (i.v.) injections of GR127935 (30 mu g/kg) and ritanserin (100 mu g/kg). One-minute (l-min) intracarotid (i.c.) infusions of 5-HT (0.1-10 mu g/min), 5-carboxamido-tryptamine (5-CT; 0.01-0.3 mu g/min), 5-methoxytryptamine (5-MeO-T; 1-100 mu g/min) and acetylcholine (ACh; 0.003-0.1 mu g/min) resulted in dose-dependent increases in internal carotid blood flow (without changes in blood pressure or heart rate) with a rank order of agonist potency of ACh > 5-CT >> 5-HT greater than or equal to 5-MeO-T. The internal carotid vasodilator responses to 5-HT, 5-CT and 5-MeO-T, which remained unaffected after saline (0.03 ml/kg and 0.1 ml/kg, i.v.), were specifically and dose-dependently blocked by i.v. administration of lisuride (10 mu g/kg and 30 mu g/kg), clozapine (1000 mu g/kg), mesulergine (300 mu g/kg and 1000 mu g/kg) and LY215840 (300 mu g/kg and 1000 mu g/kg) with the following apparent rank order of potency: lisuride >> mesulergine = LY215840 greater than or equal to clozapine. The above results suggest that the 5-HT receptor mediating internal carotid vasodilatation in vagosympathectomized dogs pretreated with GR127935 and ritanserin is operationally similar to other 5-HT7 receptors mediating vascular and non-vascular responses MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000088590700012 L2 - internal carotid artery;dog;GR127935;LY215840;mesulergine;ritanserin;5-hydroxytryptamine;5-HT7 receptor;vasodilatation;SEROTONIN RECEPTOR; VAGOSYMPATHECTOMIZED DOGS; CLOSE RESEMBLANCE; MOLECULAR-CLONING; HIGH-AFFINITY; OPERATIONAL CHARACTERISTICS; ADENYLATE-CYCLASE; GUINEA-PIG; BLOOD-FLOW; 5-HYDROXYTRYPTAMINE SO - Naunyn-Schmiedebergs Archives of Pharmacology 2000 ;362(2):169-176 377 UI - 15613 AU - Cepeda-Palacios R AU - Scholl PJ AD - Univ Autonoma Baja California, Dept Zotecn, La Paz 23080, Baja California, MexicoFt Dodge Anim Hlth, Princeton, NJ 08543, USACepeda-Palacios, R, Univ Autonoma Baja California, Dept Zotecn, Km 5-5 Carr Sur,POB 19-B, La Paz 23080, Baja California, Mexico TI - Factors affecting the larvipositional activity of Oestrus ovis gravid females (Diptera : Oestridae) AB - Observations of fly strikes or larvipositions (n=68 in 21 days of observation) were carried out in a herd of goats during the spring in Baja California Sur, Mexico in order to identify the climatic conditions favoring larviposition activity of gravid Oestrus ovis L. flies, as well as to investigate whether a mixture of some potentially useful compounds was involved in this behavior. Hand-caught, tethered flies (n=43) were either exposed or unexposed to a combination of carbon dioxide, humidity, 1-octen-3-ol, butyric, propionic, acetic acid and acetone released from movable sheep and goat dummies under open field and cage conditions. Fly strikes occurred at temperatures greater than 20 degrees C, but mainly between 25 and 28 degrees C and from 116 to 838 W m(-2) of solar irradiance. Few or no strikes were seen under moderate or strong wind, but did occur in a wide range of relative humidity. The chemicals applied did not improve the capacity of animal dummies to induce the flies to larviposit, but very irregular behavior was observed. Fourteen larvipositions were made on the dummies lacking chemical stimuli, so visual ability and movement by the dummies was very important in stimulation of the flies. Temperature appeared to be the main factor determining fly activity, but wind and solar irradiance also played important roles. Characteristics of O. ovis larviposition an discussed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000088245600009 L2 - sheep nose bots;adult;stimulation;behavior;climatic factors;goats;BLOWFLY LUCILIA-SERICATA; CEPHENEMYIA-TROMPE; HYPODERMA-TARANDI; BAITED TRAPS; RESPONSES; REINDEER; FLIES; SHEEP; PARASITES SO - Veterinary Parasitology 2000 ;91(1-2):93-105 378 UI - 15797 AU - Cepeda-Palacios R AU - Frugere S AU - Dorchies P AD - Univ Autonoma Baja California, Dept Zootecn, La Paz 23080, Baja California, MexicoEcole Natl Vet, Lab Associe Physiopatol Resp Ruminants, F-31076 Toulouse, FranceCepeda-Palacios, R, Univ Autonoma Baja California, Dept Zootecn, Km 5-5 Carr Al Sur,POB 19-B, La Paz 23080, Baja California, Mexico TI - Expected effects of reducing Oestrus ovis L. mature larval weight on adult populations AB - In order to estimate the effects of eventual reductions in larval weight (LW) of Oestrus ovis L. as a measure of control, the correlation between mature LW and adult fly length (AL) in laboratory specimens (n=150) was calculated. The regression equation AL=5.62+10.65LW (r(2)=0.76) was obtained. This equation was then applied to estimate the mature LW of wild larvipositing females (n=51) to predict the minimum mature LW at which fly viability would be compromised. The critical weight, 0.28 g (standard error limits 0.235, 0.323), was obtained from a small fly measuring 8.6 mm in length. Data from 383 mature third instars were used to estimate, by statistical analysis, the expected effects of decreasing the mature LW on subsequent fly population size. A considerable mean reduction (38%) in adult populations might be achieved by a 40% reduction of mature LW, but this eventual reduction may be temporary due to the high reproductive rate in this species. Sex differences in mature LW and fly size are also reported. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000087769200009 L2 - Oestrus ovis;growth;larva;fly population;larval weight;OESTRIDAE; DIPTERA SO - Veterinary Parasitology 2000 ;90(3):239-246 379 UI - 15428 AU - Cepedes CL AU - Alarcon JE AU - Becerra JA AU - Silva MO AU - Achine L AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Bio Bio, Dpt Ciencias Basicas, Fac Ciencias, Chillan, ChileConcepcion Univ, Fac Ciencias Nat, Lab Quim Prod Nat, Concepcion, Chile TI - Allelopathic effects of extracts and compounds from Maytenus disticha (Celastraceae) MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246100090 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U39-U39 380 UI - 15714 AU - Cerda-Garcia-Rojas CM AU - Zamorano G AU - Chavez MI AU - Catalan CAN AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Tucuman, Inst Quim Organ, Fac Bioquim Quim & Farm, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - H-1 and C-13 NMR study of copteroside E derivatives AB - The triterpenoid saponin copteroside E (1) was isolated from the flowers and leaves of Verbesina suncho. Detailed H-1 and C-13 NMR assignment of its acetyl derivatives 2 and 3 was achieved by 2D NMR techniques including COSY, TOCSY, NOESY, HMQC and HMBC. The presence of a glucuronolactone moiety in 2 is supported by the calculated vs observed H-1-H-1 coupling constants. Molecular mechanics calculations on 1 were useful for understanding the formation of glucuronolactone 2 and decaacetate 3, Copyright (C) 2000 John Wiley & Sons, Ltd MH - Argentina MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000087980400003 L2 - NMR;H-1 NMR;C-13 NMR;2D NMR;copteroside E;oleanolic acid saponins;glucuronic acid derivative;glucuronolactone derivative;molecular mechanics calculations;GLYCOSIDES; ACID SO - Magnetic Resonance in Chemistry 2000 ;38(7):494-499 381 UI - 16098 AU - Cervantes-Munguia R AU - Valle-Razo FP AU - Gomez-Contreras PC AU - Hernandez-Flores G AU - Orbach-Arbouys S AU - Bravo-Cuellar A AD - Hop Paul Brousse, Serv Pharm, F-94804 Villejuif, FranceIMSS, OCC, Ctr Invest Biomed, Guadalajara, Jalisco, MexicoOrbach-Arbouys, S, Hop Paul Brousse, Serv Pharm, 14-16 Ave Paul Vaillant Couturier, F-94804 Villejuif, France TI - Serum lipoperoxide in the pregnant woman and in term and premature neonates MH - France MH - Mexico|Jalisco PB - PARIS 06: MASSON EDITEUR RP - NOT IN FILE U3 - TC 1 U4 - Medicine, General & Internal U5 - J;Letter AV - French IS - 0755-4982 UR - ISI:000086653600004 SO - Presse Medicale 2000 ;29(14):788-788 382 UI - 16294 AU - Cervantes J AU - Gonzalez-Alatorre G AU - Rohack D AU - Pannell KH AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoInst Technol Celaya, Dept Ingn Quim, Celaya 38010, Guanajuato, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAUniv Texas, Inst Mat Res, El Paso, TX 79968, USACervantes, J, Univ Guanajuato, Fac Quim, Guanajuato 36050, Mexico TI - Kinetic studies on the hydrosilylation of phenylacetylene with R3SiH (R-3 = PhMe2, Ph2Me, Ph-3, Et-3) using bis(1,2-diphenylphosphinoethane)norbornadiene rhodium(I) hexafluorophosphate as catalyst AB - Product distribution and kinetic studies on the hydrosilylation of phenylacetylene by Ph3SiH, Ph2MeSiH, PhMe2SiH and Et3SiH mere performed using bis-[1,2-diphenylphosphinoethane]norbornadienerhodium(I) hexafluorophosphate, 1, as catalyst. Pre-equilibration of the catalyst with the acetylene produced hydrosilylations, pre-equilibration with the silane did not. The catalyst showed a pronounced selectivity for cts-addition to form beta-products. t-PhCH=CHSiR3, unlike most hydrosilylation catalysts, The kinetic studies showed a hydrosilylation reaction that is zero order with respect to both acetylene and the silane, with a dependency upon catalyst concentration. The k(obs) value is directly influenced by the substituents on the silane: k(PhMe2SiH) > k (Et3SiH > k (Ph2MeSiH) > k (Ph3SiH). Intercalation of the catalyst in hectorite was not useful, since either no reaction occurred in non-polar solvents, or extraction of the catalyst occurred in polar solvents to produce the same product distributions. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Mexico|Guanajuato MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Applied;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0268-2605 UR - ISI:000086209900002 L2 - hydrosilylation;phenylacetylene;regioselectivity;kinetic studies;bis(1,2-diphenylphosphinoethane);norbornadienerhodium(I);hexafluorophosphate;METAL-COMPLEXES; HYDROSILATION; SILANES; PHENYL; MECHANISM; ALKYNES; OXYGEN; SYSTEM SO - Applied Organometallic Chemistry 2000 ;14(3):146-151 383 UI - 16357 AU - Cervera R AU - Font J AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Rosas J AU - Morla RM AU - Munoz FJ AU - Artigues A AU - Pallares L AU - Ingelmo M AD - Univ Barcelona, Hosp Clin Barcelona, IDIBAPS, Dept Med,Syst Autoimmune Dis Unit, E-08036 Barcelona, SpainBenemerita Univ Autonoma Puebla, Sch Med, Rheumatol Unit, Puebla 72570, MexicoHosp Vila Joisa, Rheumatol Unit, Alicante, SpainHosp Son Dureta, Dept Internal Med, Mallorca, SpainCervera, R, Hosp Clin Barcelona, Unitat Malalties Autoimmunes Sistem, C Villarroel 170, E-08036 Barcelona, Spain TI - Primary Sjogren's syndrome in men: clinical and immunological characteristics AB - Objective: To determine the clinical and immunological characteristics of primary Sjogren's syndrome (SS) in men from a large series of unselected patients with this condition. Methods: We studied 223 consecutive patients (204 women and 19 men; mean age at onset 53 y, range 15-87 y, mean disease duration 77 months) with primary SS visited in our units. All these patients fulfilled 4 or more of the diagnostic criteria for SS proposed by the European Community Study Group in 1993. Results: Nineteen (9%) patients were men and they represent the male group described in this paper. Extraglandular manifestations during the course of their disease were present in 10 (53%) of our male patients with primary SS: articular involvement in 4 (21%) patients, interstitial pneumopathy in 3 (16%) and peripheral neuropathy in 2 (11%). ANA were positive in 13 (68%) patients, RF in 5 (31%), anti-Ro/SS-A in 3 (16%) and cryoglobulins in 1/14 (7%). When compared with women, men with primary SS presented a lower prevalence of articular involvement (21% vs 46%, P = 0.03, OR 0.32, CI 0.07-0.97). Conclusion: Although primary SS is typically a disease of middle-aged women, clinicians should note that it may be diagnosed in male patients. Except for a lower prevalence of articular involvement, we could no find any notable differences in clinical and immunological characteristics between male and female patients with primary SS MH - Mexico|Puebla MH - Spain PB - BASINGSTOKE: STOCKTON PRESS RP - NOT IN FILE U3 - TC 13 U4 - Rheumatology U5 - J;Article AV - English IS - 0961-2033 UR - ISI:000085870200010 L2 - primary Sjogren's syndrome;men;SYSTEMIC LUPUS-ERYTHEMATOSUS; PREVALENCE; COMMUNITY; CRITERIA SO - Lupus 2000 ;9(1):61-64 384 UI - 15421 AU - Cervino M AU - Luridiana V AU - Castander FJ AD - Observ Midi Pyrenees, F-31400 Toulouse, FranceUPS, Ctr Etud Spatiale Rayonnements, CNRS, F-31028 Toulouse, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoCervino, M, Observ Midi Pyrenees, 14 Ave Edouard Belin, F-31400 Toulouse, France TI - Confidence levels of evolutionary synthesis models AB - The stochastic nature of the IMF in young stellar clusters implies that clusters of the same mass and age do not present the same unique values of their observed parameters. Instead they follow a distribution. We address the study of such distributions, parameterised in terms of their confidence limits, in evolutionary synthesis models. These confidence limits can be understood as the inherent uncertainties of the synthesis models. Here we concentrate on some parameters such as EW(H beta) in emission. For instance, we show that for a cluster where 10(5) M. have been transformed into stars, the dispersion of EW(H beta) is about 18% within the 90% confidence levels at ages between 3.5 and 5 Myrs MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Letter AV - English IS - 0004-6361 UR - ISI:000088824500002 L2 - galaxies : evolution SO - Astronomy and Astrophysics 2000 ;360(1):L5-L8 385 UI - 15379 AU - Cespedes C AU - Achnine L AU - Alarcon J AU - Becerra J AU - Lotina-Hennsen B AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Bio Bio, Fac Ciencias, Dept Ciencias Basicas, Chillan, ChileConcepcion Univ, Fac Ciencias Nat & Oceanog, Dept Bot, Concepcion, ChileCespedes, C, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Photosynthetic inhibitory activity of dihydro-beta-agarofurans sesquiterpenes from Maytenus disticha and Maytenus boaria (Celastraceae) AB - The effects of 9 beta-benzoyloxy-1 alpha,2 alpha,6 beta,8 alpha,15-pentaacetoxy-dihydro-beta-agarofuran and 9 beta-furoyloxy-1 alpha,6 beta,8 alpha-triacetoxy-dihydro-beta-agarofuran, major phytogrowth inhibitors isolated from the aerial parts of Maytenus disticha (Celastraceae) and seeds of Maytenus boaria (Celastaraceae), respectively, on different photosynthetic activities of isolated spinach chloroplasts have been investigated. Photophosphorylation and electron transport (basal, phosphorylating and uncoupled) were inhibited in a concentration dependent manner by both compounds, therefore acting as Hill reaction inhibitors. The site of action of these natural compounds was located in the span from P-680 to Q(A). 9 beta-benzoyloxy-1,2,6,8,15-pentaacetoxydihydro-beta-agarofuran was one order of magnitude more potent (I-50 = 2.6 mu M) than 9 beta-furoyloxy-1,6,8,-triacetoxydihydro-beta-agarofuran, suggesting that the substitution at C-9 and the acetoxy groups at carbons 2 and 15 are important structural requirements for the displayed inhibitory activity MH - Chile MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000088827100023 L2 - Maytenus species;beta-agarofuran;Hill reaction inhibitor;ELECTRON-TRANSPORT; SPINACH-CHLOROPLASTS; ANTIFEEDANT ACTIVITY; PHOTOPHOSPHORYLATION; DERIVATIVES; ACCEPTOR SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2000 ;55(7-8):631-637 386 UI - 15599 AU - Chandrasekharam D AU - Vaselli O AU - Sheth HC AU - Keshav S AD - Indian Inst Technol, Dept Earth Sci, Bombay 400076, Maharashtra, IndiaUniv Florence, Dept Earth Sci, I-50121 Florence, ItalyUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoFlorida Int Univ, Dept Geol, Miami, FL 33199, USAChandrasekharam, D, Indian Inst Technol, Dept Earth Sci, Bombay 400076, Maharashtra, India TI - Petrogenetic significance of ferro-enstatite orthopyroxene in basaltic dikes from the Tapi rift, Deccan flood basalt province, India AB - Some basaltic dikes from the Tapi rift in the Deccan flood basalt province, India, contain abundant clusters of prismatic quench crystals of ferro-enstatite orthopyroxene (Fe39-42Mg53-57Ca2-4) Such profuse orthopyroxene clusters are not yet known from any other flood basalt province in the world. Based on petrography, mineral chemistry and whole-rock chemistry, we conclude that these crystals are formed due to assimilation of shale by Deccan basalt magma. This interpretation is consistent with the known bedrock geology of the area. These quench crystals constitute the first direct, petrographic evidence for crustal contamination in the Deccan province. The liquidus temperature for the dikes is estimated at 1220 +/- 10 degrees C, with the crystallization temperature of the orthopyroxene at 1080 degrees C or less. (C) 2000 Elsevier Science B.V. All rights reserved MH - India MH - Italy MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0012-821X UR - ISI:000088213600004 L2 - assimilation;flood basalts;Deccan Plateau;dikes;orthopyroxene;igneous rocks;genesis;TRAPS SO - Earth and Planetary Science Letters 2000 ;179(3-4):469-476 387 UI - 15836 AU - Chang GW AU - Espinosa-Perez G AU - Mendes E AU - Ortega R AD - Univ Paris 11, Supelec Univ,Lab Signaux & Syst, CNRS, UMR 8506, F-91192 Gif Sur Yvette, FranceUniv Mexico, II UNAM, Mexico City, DF, MexicoUniv Paris 06, Supelec Univ, CNRS, Lab Genie Elect Paris, F-91192 Gif Sur Yvette, FranceUniv Paris 11, Supelec Univ, CNRS, Lab Genie Elect Paris, F-91192 Gif Sur Yvette, FranceChang, GW, R&D Ctr St Gaubin, Chambery, France TI - Tuning rules for the PI gains of field-oriented controllers of induction motors AB - In a recent contribution, the authors have shown that field-oriented controllers for induction motors preserve stability under a wide range of variations of the motor and controller parameters. However, as is well known, the transient performance critically depends on the tuning of the gains of the proportional-integral (PI) velocity loop, a task which is rendered difficult because of the high uncertainty on the rotor resistance. The problem me address in this paper is how to develop an offline procedure to choose these gains. The main contribution of our work is a very simple frequency-domain test that, for each setting of the PI gains, evaluates the maximum range of the relative rotor resistance estimate for which global stability is guaranteed. In this may, we provide a quantitative estimate of the performance of the PI controller. The stability result may also be used in a dual manner, fixing now the range of the rotor resistance, and estimating an admissible interval for the PI gains that preserves global stability. Instrumental for our study is the exploitation of an energy dissipation (strict passivity) property of the system MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0278-0046 UR - ISI:000087695600012 L2 - motor drives;nonlinear control;proportional-integral tuning rules;DISCRETE-TIME CONTROLLER; SPEED REGULATION SO - Ieee Transactions on Industrial Electronics 2000 ;47(3):592-602 388 UI - 15191 AU - Chapman JW AU - Williams T AU - Martinez AM AU - Cisneros J AU - Caballero P AU - Cave RD AU - Goulson D AD - Univ Southampton, Sch Biol Sci, Biodivers & Ecol Div, Southampton SO16 7PX, Hants, EnglandECOSUR, Tapachula 30700, Chiapas, MexicoUniv Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainEscuela Agr Panamer, Dept Protecc Vegetal, El Zamorano, HondurasChapman, JW, AFRC, Inst Arable Crops Res, Dept Entomol & Nematol, Harpenden AL5 2JQ, Herts, England TI - Does cannibalism in Spodoptera frugiperda (Lepidoptera : Noctuidae) reduce the risk of predation? AB - The incidence of cannibalism of larval Spodoptera frugiperda (Lepidoptera: Noctuidae) on maize under field conditions was investigated using field cages. Cannibalism was found to account for approximately 40% mortality when maize plants were infested with two or four fourth-instar larvae over a 3-day period. Field trials examined the effect of larval density on the prevalence of natural enemies of S. frugiperda. The abundance of predators (earwigs, staphylinids, other predatory beetles, and Chrysoperla spp.) was significantly greater on maize plants with higher levels of larval feeding damage, while the relationship between predator abundance and number of S. frugiperda larvae per plant was less clear. As larval damage is probably a more reliable indicator of previous larval density than numbers collected at an evaluation, this indicates that predation risk will be greater for larvae living in large groups. Parasitism accounted for 7.1% mortality of larvae in sorghum, and involved six species of Hymenoptera and Tachinidae. There was no effect of larval density or within-plant distribution on the probability of larval attack by parasitoids. The selective benefits of cannibalism, in relation to the risk of predation and parasitism, are discussed MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 0340-5443 UR - ISI:000089511700009 L2 - Spodoptera frugiperda;cannibalism;predation;parasitism;FALL ARMYWORM LEPIDOPTERA; NUCLEAR POLYHEDROSIS-VIRUS; WILLOW LEAF BEETLE; EOCANTHECONA-FURCELLATA; LOCATING BEHAVIOR; HOST LOCATION; CHEMICAL CUES; STINK BUG; LARVAE; CONSEQUENCES SO - Behavioral Ecology and Sociobiology 2000 ;48(4):321-327 389 UI - 15161 AU - Charatonik JJ AU - Charatonik WJ AU - Illanes A AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Openness of induced projections AB - For continua X and Y it is shown that if the projection f : X x Y --> X has its induced mapping C(f) open, then X is C*-smooth. As a corollary, a characterization of dendrites in these terms is obtained MH - Mexico|Distrito Federal MH - Poland PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000089527300034 L2 - C*-smooth;continuum;dendrite;induced mapping;open;projection SO - Proceedings of the American Mathematical Society 2000 ;128(12):3711-3714 390 UI - 15200 AU - Charatonik JJ AU - Omiljanowski K AU - Villani A AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Catania, Dept Math, I-95125 Catania, ItalyCharatonik, JJ, Natl Autonomous Univ Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Interiority of real functions AB - Conditions concerning openness of continuous real functions defined on topological spaces are studied. It is shown that for locally compact metrizable spaces interiority of the function at a point is equivalent to having no local extremum at this point if and only if the domain space is connected im kleinen at the point. Some related results are some obtained and open questions are posed MH - Italy MH - Mexico|Distrito Federal MH - Poland PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0033-5606 UR - ISI:000089447600003 SO - Quarterly Journal of Mathematics 2000 ;51():299-306 391 UI - 15857 AU - Charatonik JJ AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - On feebly monotone and related classes of mappings AB - A mapping between continua is said to be feebly monotone if whenever the range is the union of two proper subcontinua, their preimages are connected. Basic properties of these mappings and their connections with related classes of mappings are investigated. Further, some special properties of continua as indecomposability, irreducibility, unicoherence, and some other are studied when applied to either the domain or the range of the considered mapping. Finally terminal subcontinua and related concepts are discussed pertinent to feebly monotone mappings. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000087588500002 L2 - almost monotone;continuum;feebly monotone;mapping;quasi-monotone;weakly monotone SO - Topology and Its Applications 2000 ;105(1):15-29 392 UI - 16222 AU - Charatonik JJ AU - Charatonik LJ AU - Krupski PL AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Dendrites and light open mappings AB - It is shown that a metric continuum X is a dendrite if and only if for every compact space Y and for every light open mapping f : Y --> f(Y) such that X subset of f(Y) there is a copy X' of X in Y for which the restriction f\X' : X' --> X is a homeomorphism. Another characterization of dendrites in terms of continuous selections of multivalued functions is also obtained MH - Mexico|Distrito Federal MH - Poland PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000086363600033 L2 - continuum;dendrite;light;mapping;multifunction;open;selection SO - Proceedings of the American Mathematical Society 2000 ;128(6):1839-1843 393 UI - 16666 AU - Charatonik JJ AU - Charatonik WJ AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, Mexico TI - Limit properties of induced mappings AB - Given a class M of mappings f between continua, near-M stands for the class of uniform limits of sequences of mappings from M. Let 2(f) and C(f) mean the induced mappings between hyperspaces. Relations are studied between the conditions: f is an element of near-M, 2(f) is an element of near-M and C(f) is an element of near-M. A special attention is paid to the classes M of open and of monotone mappings. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000084500900003 L2 - continuum;homeomorphism;hyperspace;induced mapping;monotone;near-monotone;near-open;open SO - Topology and Its Applications 2000 ;100(2-3):103-118 394 UI - 14711 AU - Charlet S AU - Gillet F AU - Villarreal ML AU - Barbotin JN AU - Fliniaux MA AU - Nava-Saucedo JE AD - UPJV, Fac Pharm, Lab Phytotechnol, EA 2085, F-80037 Amiens 1, FranceIMSS, Ctr Invest Biomed Sur, Xochitepec, Morelos, MexicoUniv Autonoma Estado Morelos, Ctr Invest Biotecnol, Cuernavaca, Morelos, MexicoUPJV, Fac Sci, Lab Genie Cellulaire, CNRS,UPRES A 6022, F-80039 Amiens, FranceCharlet, S, UPJV, Fac Pharm, Lab Phytotechnol, EA 2085, 1 Rue Louvels, F-80037 Amiens 1, France TI - Immobilisation of Solanum chrysotrichum plant cells within Ca-alginate gel beads to produce an antimycotic spirostanol saponin AB - Plant cell cultures of the Mexican species Solanum chrysotrichum can be established from friable calli. These cells produce an antifungal spirostanol saponin designated SC1. Plant cell immobilisation within Ca-alginate gel beads can lead to an enhancement in secondary metabolite production. Different matrices, obtained by varying calcium (0.1 to 0.8 mol.L-1) and alginate (1 to 1.5 % w/v) concentrations were used to study the influence of immobilisation parameters on the behaviour of S. chrysotrichum cells. Throughout the growth cycle and in the various immobilisation conditions, fresh and dry weight, SC1 yield and viability were measure. Important metabolic, morphological and physiological modulation seemed to be generated by the gel bead networks and by the cell-cell interactions inherent to the microenvironmental constraints. An accumulation of starch grains was observed through amyloplasts. Immobilised S. chrysotrichum cells accumulated 5 mg.g(-1) dry weight of SC1. Although this was four times less than the free cells, the desired metabolite was excreted into the surrounding medium (around 40% of the total production). (C) 2000 Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Morelos PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0981-9428 UR - ISI:000165823900008 L2 - excretion;immobilisation;secondary metabolite;Solanum chrysotrichum;spirostanol saponin (SC1);SECONDARY METABOLITE PRODUCTION SO - Plant Physiology and Biochemistry 2000 ;38(11):875-880 395 UI - 14952 AU - Chase MW AU - De Bruijn AY AU - Cox AV AU - Reeves C AU - Rudall PJ AU - Johnson MAT AU - Eguiarte LE AD - Royal Bot Gardens, Jodrell Lab, Richmond TW9 3DS, Surrey, EnglandUniv Nacl Autonoma Mexico, Ctr Ecol, Mexico City 04510, DF, MexicoChase, MW, Royal Bot Gardens, Jodrell Lab, Richmond TW9 3DS, Surrey, England TI - Phylogenetics of Asphodelaceae (Asparagales): An analysis of plastid rbcL and trnL-F DNA sequences AB - Phylogenetic relationships of Asphodelaceae were investigated by parsimony analysis of 57 monocot rbcL nucleotide sequences, including 17 genera that have at some time been assigned to the family. All genera of Asphodelaceae except for three (Hemiphylacus, Paradisea and Simethis) form a strongly supported monophyletic group with Hemerocallidaceae and Xanthorrhoeaceae as their immediate sister taxa. In a second analysis, we added 34 plastid trnL-F sequences tan intron and a spacer between two transfer RNA genes) for the Asphodelaceae clade and nearest outgroup families (Doryanthaceae, Hemerocallidaceae, Iridaceae, Ixioliriaceae, Tecophilaeaceae and Xanthorrhoeaceae) in an attempt to improve resolution and levels of internal support. The results from the separate analyses produced highly similar although not identical results. No strongly supported incongruent groups occurred, and we combined both sequence regions in one analysis, which demonstrated improved results. Strong support exists for a monophyletic subfamily Alooideae, but this leaves a paraphyletic subfamily Asphodeloideae because Bulbine/ Jodrellia alone are strongly supported as the sister group of Alooideae. Characters that have been used to separate Alooideae as a distinct group (either as here a subfamily or as a separate family by other authors), such as secondary growth and bimodal karyotypes, are found in at least some members of Asphodeloideae, particularly in Bulbine and Jodrellia for the karyotypes, making Alooideae less easily recognized. (C) 2000 Annals of Botany Company MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 27 U4 - Plant Sciences U5 - J;Article AV - English IS - 0305-7364 UR - ISI:000165129800004 L2 - Alooideae;Asphodeloideae;Asphodelaceae;Asparagales;phylogenetic analysis;rbcL;trnL-F;molecular systematics;MONOCOTYLEDONS; SYSTEMATICS; EVOLUTION; CYTOLOGY SO - Annals of Botany 2000 ;86(5):935-951 396 UI - 15422 AU - Chavarria K AU - Terranegra L AU - Moreno-Corral MA AU - de Lara E AD - Inst Astron, Ensenada 22860, Baja California, MexicoOsservatorio Astron Capodimonte, I-80131 Naples, ItalyChavarria-K, C, Inst Astron, Carretera Tijuana Ensenada Km 107, Ensenada 22860, Baja California, Mexico TI - Photometric observations of weak-line T Tauri stars II. wtts in Taurus-Auriga, Orion and Scorpius OB2-2 AB - We present uvby-beta photometry of 116 X-ray flux-selected active stars in the directions of the Orion (40), Taurus-Auriga (58) and Scorpius OB2-2 (18) star forming regions. Additionally, we give near IR JHK photometry of 20 active stars in the Taurus-Auriga direction. Tho program stars were selected from the ROSAT All Sky Survey and EINSTEIN X-ray surveys and are spectroscopically confirmed weak-line T Tauri stars and weak line T Tauri star candidates. The photometry confirms the young nature of the program stars and also indicates that a significant fraction of the sample could be foreground objects. The data given here probably represent the largest homogeneous uvby-beta photometric sample of new WTTS and WTTS candidates. Many objects in the sample are observed photometrically for the first time MH - Italy MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000088953700001 L2 - stars : activity;stars : evolution;stars : pre-main sequence;INFRARED STANDARD STARS; SAN-PEDRO-MARTIR; ALL-SKY SURVEY; X-RAY SOURCES; REGIONS; POPULATION; SYSTEMS; BETA; ASSOCIATION SO - Astronomy & Astrophysics Supplement Series 2000 ;145(2):187-195 397 UI - 15037 AU - Chavez-Barcenas AT AU - Valdez-Alarcon JJ AU - Martinez-Trujillo M AU - Chen L AU - Xoconostle-Cazares B AU - Lucas WJ AU - Herrera-Estrella L AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Ingn Genet Plantas, Guanajuato, MexicoScripps Res Inst, Int Lab Trop Agr Biotechnol, La Jolla, CA, USAUniv Calif Davis, Div Biol Sci, Davis, CA 95616, USAHerrera-Estrella, L, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Ingn Genet Plantas, Guanajuato, Mexico TI - Tissue-specific and developmental pattern of expression of the rice sps1 gene AB - Sucrose-phosphate synthase (SPS) is one of the key regulatory enzymes in carbon assimilation and partitioning in plants. SPS plays a central role in the production of sucrose in photosynthetic cells and in the conversion of starch or fatty acids into sucrose in germinating seeds. To explore the mechanisms that regulate the tissue-specific and developmental distribution of SPS, the expression pattern of rice (Oryza sativa) sps1 (GenBank accession no. U33175) was examined by in situ reverse transcriptase-polymerase chain reaction and the expression directed by the sps1 promoter using the beta -glucuronidase reporter gene. It was found that the expression of the rice sps1 gene is limited to mesophyll cells in leaves, the scutellum of germinating seedlings, and pollen of immature inflorescences. During leaf development, the sps1 promoter directs a basipetal pattern of expression that coincides with the distribution of SPS activity during the leaf sink-to-source transition. It was also found that during the vegetative part of the growth cycle, SPS expression and enzymatic activity are highest in the youngest fully expanded leaf. Additionally, it was observed that the expression of the sps1 promoter is regulated by light and dependent on plastid development in photosynthetic tissues, whereas expression in scutellum is independent of both light and plastid development MH - Mexico|Guanajuato MH - USA PB - ROCKVILLE: AMER SOC PLANT PHYSIOLOGISTS RP - NOT IN FILE U3 - TC 18 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000089962600018 L2 - SUCROSE-PHOSPHATE-SYNTHASE; CIS-ACTING ELEMENTS; MESSENGER-RNA; PROTEIN-PHOSPHORYLATION; SPINACH LEAVES; BETA-GLUCURONIDASE; SOURCE TRANSITION; STARCH BREAKDOWN; SEED DEVELOPMENT; LOW-TEMPERATURE SO - Plant Physiology 2000 ;124(2):641-653 398 UI - 15624 AU - Chavez-Cerda S AU - New GHC AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Laser Opt & Spect Grp, London SW7 2BW, EnglandChavez-Cerda, S, INAOE, Apdo Postal 51-216, Puebla 72000, Puebla, Mexico TI - Evolution of focused Hankel waves and Bessel beams AB - The focusing properties of a Bessel beam are analysed and interpreted in terms of its constituent conical waves. While these waves focus to a ring image in the focal plane of the lens, the beam also exhibits an apparent focus on the axis in front of the focal plane. The physical origin of this feature is explained, and it is also shown that, under certain focusing conditions, a Bessel beam can be reconstructed beyond the focal plane. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000088284200019 L2 - Bessel beams;non-diffracting beams;beam propagation;GAUSS BEAMS; PROPAGATION METHOD; BOUNDARY-CONDITIONS; DIFFRACTION SO - Optics Communications 2000 ;181(4-6):369-377 399 UI - 16453 AU - Chavez-Garcia FJ AU - Raptakis D AU - Makra K AU - Pitilakis K AD - Aristotelian Univ Salonika, Dept Civil Engn, GR-54006 Salonika, GreeceUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoRaptakis, D, Aristotelian Univ Salonika, Dept Civil Engn, POB 450, GR-54006 Salonika, Greece TI - Site effects at Euroseistest - II. Results from 2D numerical modeling and comparison with observations AB - This paper presents results of numerical modeling of site response for Euroseistest. Ground motion across a very detailed model of the subsoil of this valley has been simulated for vertically incident SH waves. The predominance of locally generated surface waves is very clear in the synthetic seismograms. These results are then compared with published studies of observed site effects at this basin and with a detailed analysis of two events in the time domain. It is discussed in which sense it is possible to obtain a good fit between observations and 1D models, even though the real behavior involves locally generated Love waves. For this reason, it can be misleading to rely on an incomplete observation such as empirical transfer functions. Finally, it is stressed that in order to predict ground motion in alluvial valleys the information contained in the phase cannot be neglected. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Greece MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 20 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0267-7261 UR - ISI:000085520500002 L2 - Euroseistest;test site;2D model;finite difference;site response;locally generated surface waves;SEDIMENT-FILLED VALLEYS; SEISMIC RESPONSE; EURO-SEISTEST; DIFFERENTIAL MOTION; SH-WAVES; AMPLIFICATION; EARTHQUAKES SO - Soil Dynamics and Earthquake Engineering 2000 ;19(1):23-39 400 UI - 16682 AU - Chavez-Garcia FJ AU - Faccioli E AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoPolitecn Milan, Dipartimento Ingn Strutturale, I-20133 Milan, ItalyChavez-Garcia, FJ, Univ Nacl Autonoma Mexico, Inst Ingn, Ciudad Univ,Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - Complex site effects and building codes: Making the leap AB - The engineering community is aware of the importance of site effects, but it lags behind seismological studies when it comes to incorporating site effect considerations in design spectra for seismic norms. This lag is reflected in the conspicuous fact that current building codes make allowance for 1D site effects but ignore complex site effects. The purpose of this paper is to explore a way for including complex site effects in a building code environment. We take as example Eurocode 8, which is a modern code that exemplifies the current approach to site effect consideration. We examine the restrictions that we have imposed to make the problem of a feasible size and discuss the approach we have taken. We propose a strategy to incorporate a class of complex site effects in a design elastic spectrum MH - Italy MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1383-4649 UR - ISI:000084388800002 L2 - accelerograph array;alluvial valleys;design spectra;seismic response;site effects;wave propagation;2D soil amplification;2D seismic resonance;SEDIMENT-FILLED VALLEYS; SEISMIC RESPONSE; DIFFERENTIAL MOTION; SH-WAVES; AMPLIFICATION; RESONANCE SO - Journal of Seismology 2000 ;4(1):23-40 401 UI - 16445 AU - Chavez-Sanchez C AU - Martinez-Palacios CA AU - Martinez-Perez G AU - Ross LG AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandUniv Autonoma Carmen, Campeche, MexicoCIAD, AC Unidad Mazatlan Acuicultura & Manejo Ambiental, Mazatlan, Sinaloa, MexicoRoss, LG, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - Phosphorus and calcium requirements in the diet of the American cichlid Cichlasoma uraphthalmus (Gunther) AB - An experiment was carried out with Cichlasoma urophthalmus (Gunther) juveniles to determine the phosphorus requirement and its interaction with dietary calcium. Twelve isoenergetic and isoproteic diets were prepared using a basal artificial diet containing vitamin-free casein, dextrin, starch, corn oil, fish oil, vitamin mixture and a mineral mixture free of calcium and phosphorus. Calcium and phosphorus levels were determined in the casein. To the basal diets were added different concentrations of phosphorus as potassium monophosphate (0.5, 1.0, 1.5 and 2.5 g kg(-1)) and calcium as calcium carbonate (0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 3.0 and 4.0 g kg(-1)). These concentrations resulted in varying Ca-P ratios (1:1, 1.33:1, 1.5:1, 1.6:1 and 2.0:1). Calcium and phosphorus concentrations in the watts were 84 mg kg(-1) and 0.003 mg kg(-1), respectively. The diet with 0.5 g kg(-1) phosphorus resulted in deficiency signs such as reduced growth, high conversion ratio, high Fat content and low bone mineralization. Increased levels of dietary calcium and phosphorus both gave improved growth and mineralization. Mineralization continued to increase with dietary phosphorus levels above that required for maximum growth. The optimum level of phosphorus in the diet was 1.5 g kg(-1), the optimum calcium level was 1.8 g kg(-1) and the optimum Ca-P ratio was 1.3. Carcass lipid levels were inversely related to dietary phosphorus MH - Mexico|Campeche MH - Mexico|Sinaloa MH - United Kingdom PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Fisheries U5 - J;Article AV - English IS - 1353-5773 UR - ISI:000085698600001 L2 - calcium;cichlid;phosphorus;CATFISH ICTALURUS-PUNCTATUS; FREE WATER; TROUT; TILAPIA; GROWTH; FISH SO - Aquaculture Nutrition 2000 ;6(1):1-9 402 UI - 14783 AU - Chavez F AU - Vicente L AU - Perera A AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoUniv Paris 06, Phys Theor Liquides Lab, CNRS, Unite Associee, F-75252 Paris 05, FranceChavez, F, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Kinetic oscillations in the catalytic CO oxidation on Pt(100) with adsorbed impurities AB - The effect of inert sites (random impurities) in the global oscillations in the oxidation of CO on Pt(100) is studied analytically via a stability analysis of the underlying mean field model. The analysis shows that the introduction of a fraction theta (d) of inert sites can reduce considerably the extent of the oscillatory region on the bifurcation diagram. The study of a mean field model explains some of the basic features that arise upon increasing the density of impurities on the catalytic surface, and it allows the analytical calculation of the bifurcation diagram. The analytical solution of the model reproduces well cellular automata simulations. In particular, we show the existence of a critical concentration of inert sites at which the oscillatory region vanishes and oscillations are no longer possible, due to the inability of the lattice to reach the minimum local concentration of CO required to trigger the surface reconstruction mechanism. We have evaluated this maximum defect concentration in the mean field approximation to be exactly theta (d)*=1-theta (+)(CO), where theta (+)(CO) is the minimum CO concentration required to trigger the (hex) to (1x1) Pt substrate transition. For the set of parameters chosen, we find here theta (d)*=0.6, which is in perfect agreement with our earlier simulation findings. (C) 2000 American Institute of Physics. [S0021-9606(00)70446-6] MH - France MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000165584900057 L2 - SPATIOTEMPORAL PATTERN-FORMATION; SPATIAL SELF-ORGANIZATION; SURFACE-STRUCTURE; DESORPTION; PT(110); INERT SO - Journal of Chemical Physics 2000 ;113(22):10353-10360 403 UI - 16083 AU - Chavez F AU - Vicente L AU - Perera A AU - Moreau M AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoUniv Paris 06, CNRS, Phys Theor Liquides Lab, F-75252 Paris 05, FranceChavez, F, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Influence of extended interactions on the surface dynamics in the catalytic CO oxidation on Pt single crystal substrate AB - The simulation of kinetic oscillations and dynamics of CO chemical fronts propagating through a Pt(100) substrate by the use of cellular automaton techniques, is reexamined with an extended interacting neighborhood model, that allows for a temperature dependence of the reaction constants. These new cellular automaton rules account for the structural phase transformations of the Pt substrate, the reaction kinetics of the adsorbed phase, and diffusion of adsorbed species. In addition it provides a richer variety of surface patterns formation. Specifically, we consider the effect of lateral interactions between adsorbed particles, this is taken into account our simulations through the definition of a site-dependent reaction constant, that is dependent of the state of the metal. This is achieved by considering an extended neighborhood of next-nearest-neighbors and beyond. For CO-CO and O-O attractive interactions, the oscillation amplitude increases as the interaction energy increases. It is shown herein that the presence of strong attractive lateral interactions in reacting adsorbate can lead to the spontaneous formation of traveling waves. The diffracting properties of the waves moving in the media with different composition (one part clean and other containing inert sites) are also investigated. It is shown that beyond a critical coverage, waves traveling from a clean part of the crystal to a partially covered surface are adsorbed by the media, destroying their coherence. Finally, it is shown that appropriate initial conditions can also lead to the formation of double stable spirals. (C) 2000 American Institute of Physics. [S0021- 9606(00)70719-7] MH - France MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000086778300055 L2 - KINETIC PHASE-TRANSITIONS; CELLULAR AUTOMATON; SELF-ORGANIZATION; EXCITABLE MEDIA; REACTION MODEL; PT(100); OSCILLATIONS; PT(110); WAVES SO - Journal of Chemical Physics 2000 ;112(19):8672-8679 404 UI - 15521 AU - Chavez O AU - Harricane MC AU - Aleman V AU - Dorbani L AU - Larroque C AU - Mornet D AU - Rendon A AU - Martinez-Rojas D AD - IPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City, DF, MexicoUniv Montpellier 1, CNRS CRBM UPR 1086, F-34293 Montpellier 5, FranceUniv Sci & Technol, Neurobiol Lab, Algiers, AlgeriaINSERM U128, Grp Muscles & Pathol, F-34196 Montpellier, FranceINSERM EMI 99 18, Lab Physiopathol Cellulaire & Mol Retine, F-67091 Strasbourg, FranceMartinez-Rojas, D, IPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Av IPN2508,Ap 14-740, Mexico City, DF, Mexico TI - Mitochondrial expression of a short dystrophin-like product with molecular weight of 71 kDa AB - In the brain, Dp71 is the most abundant protein product of the DMD gene and by alternative splicing of exon 78 two isoforms can be expressed, Dp71d and Dp71f. To explore the subcellular distribution of these Dp71 isoforms, specific monoclonal antibodies were used, Dp71d (with exon 78) was found in microsomes, while Dp71f (without exon 78) was detected in mitochondria. To determine the alterations which the absence of dystrophin proteins induces, we compared the expression of Dp71d in microsomes and Dp71f in mitochondria from mdx and mdx(3CV) mice. Dp71d in microsomes of mdx was similar to that of wild-type mice and, as expected, in mdx(3CV) this protein was undetectable. However, in mitochondria from mdx(3CV), Dp71f was overexpressed in comparison to mitochondria from mdx mice. Because in mdx(3CV) mice all the dystrophin proteins are mutated or diminished, we concluded that the protein detected in mitochondria is not a Dp71f but a novel product named Dp71f-like protein. (C) 2000 Academic Press MH - Algeria MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000088592500002 L2 - dystrophin;Dp71;Dp71f-like protein;mdx mouse;mdx(3CV) mouse;mitochondria;microsomes;up-regulation;DUCHENNE MUSCULAR-DYSTROPHY; MDX MOUSE; PROTEINS; UTROPHIN; DP71; GENE; TRANSCRIPT; ISOFORMS; MUTATIONS; PROMOTER SO - Biochemical and Biophysical Research Communications 2000 ;274(2):275-280 405 UI - 15272 AU - Chavez RE AU - Flores EL AU - Campos JO AU - de Guevara ML AU - Fernandez-Puga MC AU - Herrera J AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Cadiz, Fac Ciencias Mar, Cadiz 11510, SpainBCN, Ctr Invest Cient & Estudios Super Ensenada, Mexico City, DF, MexicoChavez, RE, Univ Nacl Autonoma Mexico, Inst Geofis, CD Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - Three-dimensional structure of the Laguna Salada Basin and its thermal regime AB - A comprehensive reinterpretation of the available gravity, magnetic, geothermal, geological and borehole information has been made of the Laguna Salada Basin to establish a 3D model of the basement and sedimentary infill. According to statistical spectral analysis, the residual gravity anomaly is due to sources with a mean regional depth of 2.8 km. The topography of the basement was obtained from a three-dimensional inversion carried out in the wavenumber domain using an iterative scheme. The maximum density contrast of -300 kg/m(3) estimated from previous studies and the mean depth of 2.5 km finally constrained this inversion. The resulting model indicated that the sedimentary infill is up to 4.2 km thick at its deepest point. According to the gravity-derived basement topography, the basin presents an asymmetry (i.e. it is of the half-graben type). It is deeper to the east, where it is delimited from the Sierra Cucapah by a step fault. By contrast, the limit with the Sierra de Juarez is a gently sloping fault (i.e. a listric fault). The basement is not even, but it comprises a series of structural highs and lows. N-S to NW-SE and E-W to NE-SW faults delimit these structural units. The magnetic modelling was constrained by (i) the gravity-derived basement topography; (ii) a Curie isotherm assumed to be between 7 km and 10 km; (iii) assuming induced magnetization only; (iv) the available geological and borehole information. The magnetic anomalies were interpreted successfully using the gravity-derived basement/sedimentary interface as the top of the magnetic bodies (i.e. the magnetic modelling supports the gravity basement topography). An elongated N-S to NW-SE trending highly magnetized body running from south to north along the basin is observed to the west of the basin. This magnetic anomaly has no gravity signature. Such a feature can be interpreted as an intrusive body emplaced along a fault running through the Laguna Salada Basin. Treatment of the gravity and magnetic information (and of their horizontal gradients) with satellite image processing techniques highlighted lineaments on the basement gravity topography correlating with mapped faults. Based on all this information, we derived detailed geological models along four selected profiles to simulate numerically the heat and fluid flow in the basin. We used a finite-difference scheme to solve the coupled Darcy and Fourier differential equations. According to our results, we have fluid flow in the sedimentary layers and a redistribution of heat flow from the basin axis toward its rims (Sierra de Juarez and Sierra Cucapah). Our model temperatures agree within an error of 4% with the observed temperature profiles measured at boreholes. Our heat-flow determinations agree within an error of +/- 15% with extrapolated observations. The numerical and chemical analyses support the hypothesis of fluid circulation between the clay-lutite layer and the fractured granitic basement. Thermal modelling shows low heat-flow values along the Laguna Salada Basin. Deep fluid circulation patterns were observed that redistribute such flow at depth. Two patterns were distinguished. One displays the heat flow increasing from the basin axis towards its borders (temperature increase of 20 degrees C). The second pattern shows an increasing heat flow from south to north of the basin. Such behaviour is confirmed by the temperature measurements in the thermometric boreholes MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-8025 UR - ISI:000089329000004 L2 - GRAVITY SO - Geophysical Prospecting 2000 ;48(5):835-870 406 UI - 15516 AU - Chavoya A AU - Sanchez A AU - Lano K AD - CINVESTAV, Gdl, Dept Elect Engn & Comp Sci, Guadalajara 445501, Jalisco, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Comp, London SW7 2BZ, EnglandSanchez, A, CINVESTAV, Gdl, Dept Elect Engn & Comp Sci, Apdo Postal 31-438, Guadalajara 445501, Jalisco, Mexico TI - Formal implementation of procedural controllers for event-driven sequential systems in chemical processes AB - This paper describes the application of a method to carry out a formally correct implementation of a logic controller for an event-driven process system. Given a control architecture and the functional specification of each controller module, formal proofs are established and discharged to demonstrate the logical equivalence between the functional specification and the code implementation of logic controllers. The methodology is illustrated with an example. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Jalisco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000088546800022 L2 - control software;logic control;discrete-event systems SO - Computers & Chemical Engineering 2000 ;24(2-7):297-302 407 UI - 15698 AU - Chavushyan V AU - Mujica R AU - Gorshkov AG AU - Konnikova VK AU - Mingaliev MG AD - Natl Inst Astrophys Opt & Elect, Puebla, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Stavropolskii K, RussiaChavushyan, V, Natl Inst Astrophys Opt & Elect, Puebla, Mexico TI - Optical spectra of four objects identified with variable radio sources AB - We obtained optical spectra of four objects identified with variable radio sources. Three objects (0029+0554, 0400+0550, 2245+0500) were found to be quasars with redshifts of 1.314, 0.761, and 1.091. One object (2349+0534) has a continuum spectrum characteristic of BL Lac objects. We analyze spectra of the radio sources in the range 0.97-21.7 GHz for the epoch 1997 and in the range 3.9-11.1 GHz for the epoch 1990, as well as the pattern of variability of their flux densities on time scales of 1.5 and 7 years. (C) 2000 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000088034700001 L2 - optical spectra;radio sources;ZELENCHUK SURVEY; COMPLETE SAMPLE; GHZ SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2000 ;26(6):339-343 408 UI - 14811 AU - Chehbouni A AU - Watts C AU - Kerr YH AU - Dedieu G AU - Rodriguez JC AU - Santiago F AU - Cayrol P AU - Boulet G AU - Goodrich DC AD - IRD, IMADES, Hermosillo 83190, Sonora, MexicoCESBIO, CNES, CNRS, UPS,IRD, F-31401 Toulouse, FranceUSDA ARS, Tucson, AZ, USAChehbouni, A, IRD, IMADES, Hermosillo 83190, Sonora, Mexico TI - Methods to aggregate turbulent fluxes over heterogeneous surfaces: application to SALSA data set in Mexico AB - The issue of using remotely sensed surface temperature to estimate the area-average sensible heat flux over surfaces made up of different vegetated patches has been investigated. The performance of three aggregation procedures, ranging from physically based through semi-empirical, to entirely empirical has been assessed by comparing measured and simulated area-average sensible heat flux. The results show that the physically based scheme perform very well. The performance of the entirely empirical scheme was reasonable but that of the semi-empirical scheme, which actually takes full advantage of remotely sensed data, was very poor. This result suggests that unlike the case of surface fluxes, it is not appropriate to use relationships between model and observational variables (here radiative and aerodynamic surface temperature) that were developed and calibrated at a local/patch scale, for an application at a larger/grid scale just by scaling the parameters. Therefore, future research should be directed towards building robust relationships between model and observational variables directly at the large-scale. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800010 L2 - aerodynamic and radiative surface temperatures;effective parameters;aggregation rules;blending height;surface heterogeneity;SENSIBLE HEAT-FLUX; SPARSE SAHELIAN VEGETATION; ENERGY-BALANCE; KB(-1) PARAMETER; LAND SURFACES; TEMPERATURE; MODELS; ROUGHNESS; TERRAIN; VARIABILITY SO - Agricultural and Forest Meteorology 2000 ;105(1-3):133-144 409 UI - 14813 AU - Chehbouni A AU - Watts C AU - Lagouarde JP AU - Kerr YH AU - Rodriguez JC AU - Bonnefond JM AU - Santiago F AU - Dedieu G AU - Goodrich DC AU - Unkrich C AD - IRD, IMADES, Hermosillo 83190, Sonora, MexicoINRA, Bordeaux, FranceCESBIO, Toulouse, FranceUSDA ARS, Tucson, AZ, USACESBIO, CNES, CNRS, IRD,UPS, F-13401 Toulouse 4, FranceChehbouni, A, IRD, IMADES, Hermosillo 83190, Sonora, Mexico TI - Estimation of heat and momentum fluxes over complex terrain using a large aperture scintillometer AB - A comprehensive experimental plan has been designed to further investigate the potential and the limitations associated with the use of a large aperture scintillometer (LAS) to infer path average sensible and momentum fluxes over complex surfaces as part of the Semi-Arid Land-Surface-Atmosphere (SALSA) program. The complexity of the terrain is associated with the type and the cover of the vegetation canopy as well as with changes in topography. Scintillometer based estimates of sensible heat flux and friction velocity are compared to those measured by eddy correlation systems over a grassland patch, a mesquite patch, and over a transect spanning both patches. The results show that considering the complexity of the surface, the overall performance of the scintillometer is relatively good. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800015 L2 - area-average sensible heat flux;effective parameters;scintillometer;eddy covariance;SENSIBLE HEAT; SCINTILLATION; AREA SO - Agricultural and Forest Meteorology 2000 ;105(1-3):215-226 410 UI - 14815 AU - Chehbouni A AU - Goodrich DC AU - Moran MS AU - Watts CJ AU - Kerr YH AU - Dedieu G AU - Kepner WG AU - Shuttleworth WJ AU - Sorooshian S AD - IRD, IMADES, Hermosillo 83190, Sonora, MexicoUSDA ARS, Tucson, AZ, USACESBIO, CNES, CNRS, IRD,UPS, Toulouse, FranceUS EPA, Off Res & Dev, Las Vegas, NV 89193, USAUniv Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721, USAChehbouni, A, IRD, IMADES, Hermosillo 83190, Sonora, Mexico TI - A preliminary synthesis of major scientific results during the SALSA program AB - The objective of this paper is to provide an overview of the primary results of the Semi-Arid Land-Surface-Atmosphere (SALSA) Program in the context of improvements to our overall understanding of hydrologic, ecologic, and atmospheric processes and their interactions in a semi-arid basin. The major findings and future research needs associated with the different core components of the program are emphasized. First, remote-sensing investigations are discussed, especially those directed toward taking full advantage of the capabilities of the new generation of satellites (ERS2/ATSR2, VEGETATION, LANDSAT7, NASA-EOS). Second, we discuss parameterization of the water and energy fluxes in arid and semi-arid regions, with special emphasis on methods to aggregate these fluxes from patch scale to grid scale. Third, we address the issues related to grassland ecology and competition for water between native grass and invasive mesquite species. Fourth, findings related to the interactions between surface water, ground water, and vegetation in a semi-arid riparian system are discussed. Next, an assessment of land use and land cover change over the entire basin over a quarter century is reviewed. Finally, unsolved issues and the needs for further research are outlined. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800021 L2 - SVAT modeling;remote-sensing;vegetation functioning;hydrology;SALSA;semi-arid;San Pedro River;riparian;ecology;SURFACE-ENERGY BALANCE; HEAT-FLUX; REGIONAL SCALES; SEMIARID LAND; MODELS; SOIL; AREA; EVAPORATION; FIELD; PARAMETERS SO - Agricultural and Forest Meteorology 2000 ;105(1-3):311-323 411 UI - 15470 AU - Chen GJ AU - Espinosa-Perez G AU - Zentella-Dehesa A AU - Silaghi-Dumitrescu I AU - Lara-Ochoa F AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoBeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R ChinaLara-Ochoa, F, Natl Autonomous Univ Mexico, Inst Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - (Tetrakis(2-pyridylmethyl)ethylenediamine)iron(II) perchlorate. Study of density functional methods AB - basis of the data obtained by X-ray diffraction, the properties of two independent crystallographic subsystems in the [Fe(tpen)](ClO4)(2). 2/3H(2)O complex are studied in detail with the density functional method B3LYP. The energies of singlet, triplet, and quintet states at different temperatures are obtained, the influences of geometry on energy changes are analyzed, the regularity of the spin-state interconversions is investigated, and the effect of the triplet and action of the anion on spin crossover are discussed. This investigation demonstrates that (1) the energy difference between the high-spin state and singlet state decreases as the Fe-N distance and geometric distortion increase, (2) the spin-equilibrium system is predominantly in low-spin form below room temperature and the proportion of high-spin state rapidly increases above room temperature, (3) one of the two cation sites has a greater presence of the high-spin content, (4) the triplet state may be responsible for the fast rate of spin-state interconversions, and (5) the B3LYP method proves to be very adequate to study the spin-state transition of this complex MH - Mexico|Distrito Federal MH - Peoples R China PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000088717900005 L2 - SPIN-STATE INTERCONVERSION; IRON(II) COMPLEXES; METAL-COMPLEXES; HEXADENTATE LIGANDS; CROSSOVER COMPLEX; EQUILIBRIA; TRANSITION; DYNAMICS SO - Inorganic Chemistry 2000 ;39(16):3440-3448 412 UI - 16552 AU - Chen GJ AU - Cruz R AU - Martinez GM AU - Lara-Ochoa F AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBeijing Normal Univ, Beijing 100875, Peoples R ChinaLara-Ochoa, F, Univ Nacl Autonoma Mexico, Inst Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Theoretical study of interactions between cavitand and fullerenes AB - Various interaction ways of cavitand and C-60 in 1:1 and 1:2 models have been studied by molecular mechanics and molecular dynamics methods. Their minimal energy geometries are obtained and the intermolecular energies analyzed in detail. HF/6-31G single point energy calculations for both 1:1 and 1:2 adducts are performed. Moreover, calculations were made for two cavitand configurations (BCAV and XCAV), and two 1:1 and 1:2 models using the semi-empirical molecular orbital method AM1. The computational results show that cavitand can encapsulate C-60 molecules. For the 1:1 models, the complex with the largest interaction energy is that with C-60 Situated below the XCAV, and for the 1:2 models that with C-60 Situated above and below the XCAV. From these results, we predict that the final product, in an experimental process, should be in a stoichiometry 1:2, with the fullerenes positioned above and below the XCAV cavities. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000085184200005 L2 - cavitand and fullerenes;molecular interaction;molecular dynamics;AM1;HF/6-37G;C-60 SO - Journal of Molecular Structure-Theochem 2000 ;496():73-81 413 UI - 15987 AU - Chen J AU - Gonzalez-Laredo RF AU - Karchesy JJ AD - Oregon State Univ, Dept Forest Prod, Corvallis, OR 97331, USAInst Tecnol Durango, Durango 34080, Dgo, MexicoGonzalez-Laredo, RF, Oregon State Univ, Dept Forest Prod, Corvallis, OR 97331 USA TI - Minor diarylheptanoid glycosides of Alnus rubra bark AB - The diarylheptanoid (S)-1,7-bis-(4-hydroxyphenyl)-heptan-3-one-5-O-beta-D-xylopyranoside and two known compounds. 1,7-bis(3,4-dihydroxyphenyl)-heptan-3-one-5-O-beta-D-glucopyranoside and platyphylloside were isolated from Alnus rubra bark. Structures were establishes by application of spectrometric techniques. (C) 2000 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Durango PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000086975500030 L2 - Alnus rubra;Betulaceae;diarylheptanoids;bark;BETULA-PENDULA; PLATYPHYLLOSIDE; CONFIGURATION SO - Phytochemistry 2000 ;53(8):971-973 414 UI - 15575 AU - Cherpitel CJ AU - Borges G AD - Inst Publ Hlth, Alcohol Res Grp, Berkeley, CA 94709, USAMexican Inst Psychiat, Mexico City 14370, DF, MexicoCherpitel, CJ, Inst Publ Hlth, Alcohol Res Grp, 2000 Hearst Ave, Berkeley, CA 94709 USA TI - Screening instruments for alcohol problems: A comparison of cut points between Mexican American and Mexican patients in the emergency room AB - The performance of alcohol use disorder screening instruments (CAGE, BMAST, AUDIT, TWEAK) at various cut points were compared between a Mexican American emergency room (ER) sample (n = 586) and a sample of ER-patients in Mexico (n = 1,417) using ICD-10 and DSM-IV criteria for alcohol dependence and harmful drinking/abuse by gender and injury status. Lowering cut points improved instrument performance substantially for females in both samples. Further research is needed to explore instrument performance by gender and level of acculturation MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 12 U4 - Substance Abuse;Psychiatry;Psychology U5 - J;Article AV - English IS - 1082-6084 UR - ISI:000088352600005 L2 - IDENTIFICATION TEST AUDIT; CAGE QUESTIONNAIRE; USE DISORDERS; GENERAL-POPULATION; 3 POPULATIONS; DRINKING; CONSUMPTION; PERFORMANCE; ETHNICITY; TWEAK SO - Substance Use & Misuse 2000 ;35(10):1419-1430 415 UI - 14690 AU - Chevez-Barrios P AU - Wiseman AL AU - Rojas E AU - Ou CN AU - Lieberman MW AD - Baylor Coll Med, Dept Pathol, Houston, TX 77030, USABaylor Coll Med, Dept Ophthalmol, Houston, TX 77030, USAUNAM, Inst Invest Biomed, Coyoacan, MexicoBaylor Coll Med, Dept Cell Biol, Houston, TX 77030, USALieberman, MW, Baylor Coll Med, Dept Pathol, Houston, TX 77030, USA TI - Cataract development in gamma-glutamyl transpeptidase-deficient mice AB - The present study was undertaken to analyse the relationship of lens glutathione (GSH) and light to cataract development in mice deficient in gamma -glutamyl transpeptidase (GGT). These mice have reduced levels of cysteine and GSI-I in the eye and develop cataracts. GGT-deficient mice raised under normal vivarium conditions, showed no cataractous changes at birth, but by 1 week they had developed nuclear opacities. By 3 weeks more severe cataracts develop, and lens GSH levels are approximately 6-7 % of wild type levels. By 6-11 weeks cataracts show nuclear and cortical involvement. liquefaction and calcification. Single cell DNA electrophoresis (comet assay) demonstrated mild DNA damage in the lens epithelium. GGT-deficient mice raised in the dark beginning the day after conception all developed cataracts, but these were less severe than those in GGT-deficient mice raised with normal vivarium lighting. Administration of N-acetyl cysteine (NAC) raises lens GSH and almost completely prevents cataract development. Our data indicate that cataract development in GGT-deficient mice is multifactorial and results From exogenous damage (exposure to light), reduced lens GSH levels, and nutritional effects secondary to low cysteine levels. (C) 2000 Academic Press MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 9 U4 - Ophthalmology U5 - J;Article AV - English IS - 0014-4835 UR - ISI:000165889500004 L2 - gamma-glutamyl transpeptidase;cataract models;cataractogenesis;N-acetylcysteine;DNA-damage;glutathione;light damage;cataract;transgenic mice;GROWTH FACTOR-I; RAT LENSES; CRYSTALLIN; CYSTEINE; BLINDNESS; INSULIN; PREVENTION; OXIDATION; MECHANISM; VISION SO - Experimental Eye Research 2000 ;71(6):575-582 416 UI - 15821 AU - Chianelli RR AU - Berhault G AU - Santiago P AU - Mendoza D AU - Espinosa A AU - Ascencio JA AU - Yacaman MJ AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoChianelli, RR, Univ Texas, Dept Chem, El Paso, TX 79968, USA TI - Synthesis, fundamental properties and applications of nanocrystals, sheets, nanotubes and cylinders based on layered transition metal chalcogenides AB - Folded and disordered MoS2 and other transition metal chalcogenides such as WS, and ReS2 have two-dimensional layered structures. A consequence of this two-dimensional macromolecular nature is the existence of highly folded and disordered structures. These structures have been recognized for a long time as "rag" and "tubular" structures and are useful as catalytic materials. More recently, formation of: nanotubes and nested nanotubes of WS2 and MoS2 have been reported and described as large fullerene-like structures. The ability of MoS2 and related compounds to form these structures remains unclear and is the subject of intense study. The study of these materials has been hindered by the inability to synthesize them in large quantities. This situation is similar to early days of research in fullerenes that progressed slowly until improved synthetic methods led to larger quantities being available. The purpose of this report is to review the synthesis of "rag" and "tubular" MoS2 and related materials and to discuss recent results MH - Mexico|Distrito Federal MH - USA PB - POULTON: MATRICE TECHNOLOGY LIMITED RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary U5 - J;Review AV - English IS - 1066-7857 UR - ISI:000087707900010 L2 - SULFIDE CATALYTIC MATERIALS; MOLYBDENUM-DISULFIDE; MOS2; FILMS; DYNAMICS SO - Materials Technology 2000 ;15(1):54-61 417 UI - 15744 AU - Chinas-Castillo F AU - Spikes HA AD - Inst Tecnol Oaxaca, Oaxaca, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Mech Engn, Tribol Sect, London SW7 2BX, EnglandChinas-Castillo, F, Inst Tecnol Oaxaca, Oaxaca, Mexico TI - Film formation by colloidal overbased detergents in lubricated contacts AB - It has been reported in the literature that overbased deter-gents can possess good antifriction and antiwear properties although the origins of these properties are not fully clear In practice, overbased detergents are colloidal dispersions and this may be important in determining their properties and mechanism of action. In the current study the lubricating properties of commercial, overbased magnesium and calcium sulfonates were measured in thin film, lubricated conditions and compared to a neutral sulfonate additive. A range of techniques was employed to evaluate the tribological performance of solutions of these additives. Film thickness measurements were carried out using optical interferometry and in-contact visualization, while friction and wear measurements complemented the study. It has been found that, when operating in thin film conditions, overbased detergents deposit solid-like boundary films on the rubbing surfaces. These films form in both rolling and mixed rolling/sliding conditions and, unlike many other colloidally-formed boundary films, are able to survive in high speed, thick plm conditions. During formation, the film rapidly reaches a thickness corresponding to one colloid particle diameter between 10 and 20 nm. After prolonged rubbing, however the film thickness reaches the equivalent of three particle diameters. No such thick boundary films are observed with the neutral sulfonate. The boundary films formed by overbased detergents produce a significant reduction in wear: However for the very smooth surfaces used in this study, they also result in an effective roughening of the very smooth surfaces studied. This leads to an increase in friction in the intermediate speed region by promoting solid-solid contact in thin fluid film conditions MH - United Kingdom MH - Mexico|Oaxaca PB - PARK RIDGE: SOC TRIBOLOGISTS & LUBRICATION ENGINEERS RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 1040-2004 UR - ISI:000087831000002 L2 - overbased detergent;film formation;elastohydrodynamic lubrication;boundary lubrication;antiwear additive;colloid;sol;friction modifier;ANTIWEAR ADDITIVES; SCATTERING SO - Tribology Transactions 2000 ;43(3):357-366 418 UI - 15745 AU - Chinas-Castillo F AU - Spikes HA AD - Inst Tecnol Oaxaca, Oaxaca, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Mech Engn, Tribol Sect, London SW7 2BX, EnglandChinas-Castillo, F, Inst Tecnol Oaxaca, Wilfrido Massieu S-N, Oaxaca, Mexico TI - The behavior of colloidal solid particles in elastohydrodynamic contacts AB - In recent years there has been considerable interest in employing dispersed, solid colloidal particles in the 1-500 nm diameter range to enhance the friction and wear characteristics of liquid lubricants. One important question concerning the use of these additives is the extent to which the tiny solid particles pass through rolling and sliding contacts. This paper describes a study of the lubricating behavior of two simple colloidal sol systems, one based on silver particles dispersed in an alkane and the other dispersed carbon black in mineral oil. Elastohydrodynamic film thickness measurements, in-contact visualization, friction and wear measurements are combined to investigate the extent to which colloidal solid particles enter a lubricated contact. It is shown that bath of the colloidal sols studied contribute to film formation at very slow speeds, when the lubricant film thickness is less than the particle diameter. However they make no contribution to film thickness at higher speeds. The silver colloid reduces friction and wear in the thin film regime but the carbon black colloid shows a negligible beneficial effect MH - United Kingdom MH - Mexico|Oaxaca PB - PARK RIDGE: SOC TRIBOLOGISTS & LUBRICATION ENGINEERS RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 1040-2004 UR - ISI:000087831000005 L2 - elastohydrodynamic lubrication;colloids;nanoparticles;sol;additive;ABRASIVE WEAR; MECHANISMS; ANTIWEAR SO - Tribology Transactions 2000 ;43(3):387-394 419 UI - 15863 AU - Cho A AU - Lara KLO AU - Yatsimirsky AK AU - Eliseev AV AD - SUNY Buffalo, Dept Med Chem, Buffalo, NY 14260, USAUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoYatsimirsky, AK, SUNY Buffalo, Dept Med Chem, Buffalo, NY 14260, USA TI - Phosphatase-triggered guest release from a cyclodextrin complex AB - [GRAPHICS] A synthetic supramolecular system is described that models the effect of phosphoryl transfer in molecular recognition. beta-Cyclodextrin-6A-phosphate (pCD), which is shown to be a substrate of alkaline phosphatase, binds cationic aromatic guests, including anticancer agents, up to 100-fold better than native beta-CD. The above observations demonstrate that pCD is capable of releasing the guests from its cavity upon hydrolysis with the phosphatase, as also confirmed by monitoring the hydrolysis in the presence of a guest MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1523-7060 UR - ISI:000087525300024 L2 - MOLECULAR RECOGNITION; PHOSPHORYLATION; PROTEIN SO - Organic Letters 2000 ;2(12):1741-1743 420 UI - 16151 AU - Chong J AU - Leonard KJ AU - Salmeron JJ AD - Agr & Agri Food Canada, Cereal Res Ctr, Winnipeg, MB R3T 2M9, CanadaUniv Minnesota, USDA ARS, Cereal Dis Lab, St Paul, MN 55108, USAINIFAP Campo Expt Sierra Chihuahua, Cd Cuauhtemoc 31500, Chih, MexicoChong, J, Agr & Agri Food Canada, Cereal Res Ctr, Winnipeg, MB R3T 2M9, Canada TI - A North American system of nomenclature for Puccinia coronata f. sp avenae AB - A nomenclature system for designating virulence phenotypes of Puccinia coronata f, sp. avenae, the causal agent of oat crown rust, is proposed. Sixteen single gene oat (Avena sativa) lines, with seedling resistance genes Pc38, 39, 40, 45, 45, 48, 50, 51, 52, 54, 56 58, 59, 62, 64, and 68, are the primary differentials. The host lines are arranged into groups of four (subset 1 = Pc40, 45, 46, 50; subset 2 = Pc38, 39, 48, 68; subset 3 - Pc51, 52, 58, 59; subset 4 = Pc54, 56, 62, 64). Avirulence and virulence of Puccinia coronata f. sp. avenae isolates on each line are indicated by law and high infection types, respectively. A letter from the 16 consonants B through T is assigned to each of the 16 possible combinations of low and high infection types on the four differentials of each subset. Designations for P. coronata f. sp. avenae virulence phenotypes are indicated by a four-letter code for the virulence combinations on all four subsets, one letter fbr each subset. Local differential series are separated from the four-letter code by a dash, followed by an additional letter code describing the virulence combinations of the isolates on the local supplemental differentials. When fewer than four differentials are used in the supplemental series, virulence combination on these differentials for each isolate is described by a listing of the Pc gene(s) to which the isolate was virulent, following the four-letter code and a dash. This nomenclature system for P coronata f. sp, avenae is similar to the nomenclature system in use for P. graminis f. sp. tritici and P. triticina MH - Canada MH - Mexico|Chihuahua MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000086512600017 L2 - SP TRITICI; VIRULENCE; CANADA; RESISTANCE SO - Plant Disease 2000 ;84(5):580-585 421 UI - 16698 AU - Christen P AU - Bramorski A AU - Revah S AU - Soccol CR AD - Univ Aix Marseille 1, CESB ESIL, IRD Microbiol Lab, F-13288 Marseille, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Chem Engn, Mexico City 09340, DF, MexicoUniv Fed Parana, Biotechnol Proc Lab, BR-81531970 Curitiba, Parana, BrazilChristen, P, Univ Aix Marseille 1, CESB ESIL, IRD Microbiol Lab, Case 925,163 Ave Luminy, F-13288 Marseille, France TI - Characterization of volatile compounds produced by Rhizopus strains grown on agro-industrial solid wastes AB - Four edible Rhizopus strains were cultivated on eight combinations of solid agro-industrial wastes (cassava bagasse, apple pomace), soyabean, amaranth grain and soyabean oil. Significant differences in growth were observed among strains on the different media studied. The medium containing cassava bagasse with soyabean (5:5 w/w) gave the highest CO2 production, while Rhizopus oryzae ATCC 34612 was the best producer of volatiles. The aromas of the cultures were light and rather pleasant. The amaranth medium with mineral salts solution produced the highest amount of volatile compounds (VC), demonstrating that the aroma of fermented solid substrates can be improved. The VC production was very rapid, attaining, in most of the cases, its maximum around the first day of culture. These maxima markedly varied according to the medium used. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Brazil MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 10 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000083703000002 L2 - CERATOCYSTIS-FIMBRIATA; STATE FERMENTATION; AROMA PRODUCTION; METABOLITES; MOLDS; FOOD SO - Bioresource Technology 2000 ;71(3):211-215 422 UI - 14999 AU - Chromik S AU - Jergel M AU - Hanic F AU - Jimenez S AU - Jergel M AU - Strbik V AU - Falcony C AU - Benacka S AU - Cheang-Wong JC AU - Andrade E AD - CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoSlovak Acad Sci, Inst Elect Engn, Bratislava 84239, SlovakiaSlovak Acad Sci, Inst Measurement Sci, Bratislava 84219, SlovakiaSlovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaCINVESTAV, Lab Invest Mat, Queretaro 76010, Qro, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoJergel, M, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Preparation and properties of precursor Ba-Ca-Cu(O, F) thin films deposited from fluorides for superconducting Tl- and Hg-based films AB - Precursor Ba-Ca-Cu-(O, F) thin films prepared by thermal evaporation of BaF2, CaF2 and Cu show good chemical resistance against the atmosphere even after a partial defluorination by means of vacuum annealing with subsequent oxidation. The prepared precursor films were characterized by X-ray diffraction (XRD) analyses and Raman scattering measurements. A possible explanation for the observed properties is presented. According to the XRD measurements performed in the grazing incidence set-up, a polycrystalline cubic BaCuO2 is the main phase after defluorination followed by oxidation. No peaks attributable to carbides (as a consequence of atmospheric exposure of the samples) were identified. Raman analysis confirmed the presence of another phase, namely CuO. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Slovakia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900029 L2 - Ba-Ca-Cu-(O, F) precursors;Tl2Ba2CaCu2Oy films;fluorides;X-ray diffraction;TEMPERATURE; EVAPORATION; SYSTEM; BAF2 SO - Thin Solid Films 2000 ;373(1-2):129-133 423 UI - 16352 AU - Chumakov SM AU - Klimov AB AU - Saavedra C AD - Univ Guadalajara, Dept Fis, Guadalajara, Jalisco, MexicoConcepcion Univ, Dept Fis, Concepcion, ChileChumakov, SM, Univ Guadalajara, Dept Fis, Corregidora 500, Guadalajara, Jalisco, Mexico TI - Dispersive atomic evolution in a dissipative-driven cavity AB - We study the dynamics of a collection of two-level atoms interacting with a single mode of a quantized field in a dissipative cavity in the dispersive regime. The quantized mode is driven by a classical driving field. The steady-state density matrix is obtained. The influence of the driving field on the quantized driven field and on atomic properties in both the dissipative and the lossless cases is studied. The atomic decoherence time in the dissipative-driven case is obtained. We show that the external driving field strongly suppresses the atomic coherence (in comparison with the dissipative cavity without the driving field) MH - Chile MH - Mexico|Jalisco PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000085836300112 L2 - SCHRODINGER-CAT STATES; COLLECTIVE INTERACTIONS; QUANTUM; DECOHERENCE; DYNAMICS; LIMIT SO - Physical Review A 2000 ;61(3): 424 UI - 15102 AU - Cifuentes E AU - Gomez M AU - Blumenthal U AU - Tellez-Rojo MM AU - Romieu I AU - Ruiz-Palacios G AU - Ruiz-Velazco S AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoUniv London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1E 7HT, EnglandCtr Dis Control & Prevent, Atlanta, GA 30341, USANatl Inst Nutr, Dept Infectol, Tlalpan 14000, MexicoUniv Nacl Autonoma Mexico, Inst Matemat Aplicadas Sistemas, Copilco 04320, MexicoCifuentes, E, Inst Nacl Salud Publ, Av Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Risk factors for Giardia intestinalis infection in agricultural villages practicing wastewater irrigation in Mexico AB - This study assessed the risk factors for Giardia intestinalis infection in an agricultural population in Mexico. Exposure groups included 2,257 individuals from households exposed to untreated wastewater, 2,147 from a group using the effluent from a series of reservoirs, and 2,344 from rain-fed agricultural villages. Stool samples were collected from 6,748 individuals. Wastewater samples were tested for fecal coliforms/100 mi and Giardia sp. cysts/L. Unheated wastewater samples contained 10(8) fecal coliforms/100 mi and up to 300 Giardia sp, cysts/L. Hydraulic retention (3-7 months) in the reservoirs, however, provided an improved effluent quality (10(1)-10(4) fecal coloforms/100 mi and 5 Giardia sp. cysts/L). Children 1-14 years of age had the highest prevalence of infection (20%). Data showed marginal associations between storing drinking water in unprotected containers and lack of facilities for feces disposal and the risk of infection (odds ratios [ORs] = 1.76 and 1.19, 95% confidence intervals [CIs] = 0.95-3.23, and 0.97-1.45, respectively). Individuals purchasing vegetables at the city market had higher rates of infection than those buying at the village shop (OR = 2.49, 95% CI = 1.00-6.17). No excess risk was found in individuals exposed to untreated wastewater compared with controls (OR = 1.07, 95% CI = 0.84-1.36); the group using reservoir water was not different from the controls (OR = 1.22, 95% CI = 0.94-1.58). No risk from agricultural activities was detected (OR = 0.83). This pattern of infection may be addressed by primary health care and wastewater treatment MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 16 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000089774900014 L2 - WATER; CHILDREN; LAMBLIA SO - American Journal of Tropical Medicine and Hygiene 2000 ;62(3):388-392 425 UI - 14866 AU - Civitarese O AU - Hirsch JG AU - Montani F AU - Reboiro M AD - Natl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCivitarese, O, Natl Univ La Plata, Dept Fis, CC 67, RA-1900 La Plata, Argentina TI - Extended quasiparticle random phase approximation at finite temperatures: Calculation of single beta-decay Fermi transitions AB - The formalism of the quasiparticle random phase approximation, extended to include scattering terms in the equation of motion, is used to describe allowed single beta -decay transitions of Fermi type at finite temperatures. The calculations were performed by using a realistic single particle basis and a separable two body interaction in the proton-neutron channel. The behavior of the Ikeda sum rule is studied and it is found that this sum rule is strictly conserved in the presence of particle-particle and hole-hole correlations. As an example on the validity of the formalism the case of Fermi transitions in Ge-76 is considered MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000165369400034 L2 - SUPPRESSION; NUCLEI SO - Physical Review C 2000 ;6205(5): 426 UI - 15811 AU - Civitarese O AU - Hess PO AU - Hirsch JG AU - Reboiro M AD - Natl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaUniv Giessen, Inst Theoret Phys, D-35392 Giessen, GermanyNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCivitarese, O, Natl Univ La Plata, Dept Fis, CC 67, RA-1900 La Plata, Argentina TI - Fermion and boson condensates in a QCD-inspired model Hamiltonian AB - The interaction between bi-fermionic and bosonic degrees of freedom is described by using an effective Hamiltonian inspired in QCD. The Dyson boson mapping technique is utilized in conjunction with a coherent state basis to construct energy landscapes in a multiparametric space. The appearance of fermionic and bosonic condensates is studied by minimizing the potential energy surface. The relationship between the domains of fermion and boson condensates and the order parameters of the model is discussed MH - Argentina MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000087575000020 L2 - MILLS FIELD-THEORY; SPURIOUS STATES; REPRESENTATIONS; REALIZATIONS; RADIATION; MAPPINGS; ALGEBRAS SO - Physical Review C 2000 ;6106(6): 427 UI - 16344 AU - ckson-Urdaneta L AU - Torres-Hernandez G AU - Becerril-Perez C AU - Gonzalez-Cossio F AU - Osorio-Arce M AU - Garcia-Betancourt O AD - Colegio Postgraduados, Montecillo 56230, MexicoFdn Nacl Invest Agropecuarias, Ciae Lara, VenezuelaTorres-Hernandez, G, Colegio Postgraduados, Montecillo 56230, Mexico TI - Comparison of Alpine and Nubian goats for some reproductive traits under dry tropical conditions AB - The objective of this study was to compare some reproductive traits of Alpine and Nubian goats under an intensive management system in a dry tropical environment. Goats were kept under confinement in half-covered pens and fed grass hay plus a commercial concentrate. Data were analyzed for kidding interval, prolificacy and gestation length. No significant (p > 0.05) breed effect was found for kidding interval; Alpine averaged 390.7 vs. 414.4 days for Nubian. There was, however, a significant effect (p < 0.01) attributable to year of kidding; means ranged from 284 in 1989 to 590 days in 1994. Prolificacy was significantly affected (p < 0.01) by breed and year of kidding, Alpine and Nubians averaged 1.25 and 1.38 kids per parturition, respectively. Prolificacy ranged from 1.53 in 1989 to 1.39 in 1994. A significant (p < 0.01) breed effect on gestation length was found; means for Alpine and Nubians were 151.6 and 149.2 days, respectively. Kidding interval increased as years advanced, while prolificacy decreased the first 4 years of the study, thereafter began to increase. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000085957900013 L2 - goats;reproductive efficiency;intensive management;climatic factors;PRODUCTIVITY; PERFORMANCE SO - Small Ruminant Research 2000 ;36(1):91-95 428 UI - 15261 AU - Clapp M AU - Marzantowicz W AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoA Mickiewicz Univ, Fac Math & Comp Sci, Poznan, PolandClapp, M, Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Essential equivariant maps and Borsuk-Ulam theorems AB - A full characterization is given of those compact Lie groups G with the property that every G-map X-->X on a finite-dimensional C-complex X of finite orbit type, X-G = O, is (non-equivariantly) essential. For arbitrary G, conditions are given on the G-space X which guarantee this property. Finally, conditions are given for the non-existence of a G-map X-->Y inducing a homotopy equivalence X-G similar or equal to Y-G on the fixed point sets. These results have applications to critical point theory of almost G-invariant functionals MH - Mexico|Distrito Federal MH - Poland PB - LONDON: LONDON MATH SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0024-6107 UR - ISI:000089262300024 L2 - CRITICAL-POINT THEORY; BURNSIDE RING; FUNCTIONALS; SYMMETRIES; EXISTENCE; HOMOTOPY; SPHERES SO - Journal of the London Mathematical Society-Second Series 2000 ;61():950-960 429 UI - 14501 AU - Clark GG AU - Martinez HQ AU - Rangel YN AD - Ctr Dis Control & Prevent, Dengue Branch, San Juan, PR 00920, USAUniv Autonoma de Nuevo Leon, Fac Ciencias Biol, Entomol Lab, San Nicolas De Los Garza, Nuevo Leon, MexicoCent Univ Venezuela, Inst Zool Trop, Lab Biol Vectores, Caracas, VenezuelaClark, GG, Ctr Dis Control & Prevent, Dengue Branch, 1324 Calle Canada, San Juan, PR 00920 USA TI - Mosquito vector control and biology in Latin America - A tenth symposium AB - The 10th annual Latin American symposium presented by the American Mosquito Control Association (AMCA) was held as part of the 66th Annual Meeting in Atlantic City, NJ, in March 2000. The principal objective, as for the previous 9 symposia, was to promote participation in the AMCA by vector control specialists, public health workers, and academicians from Latin America. This publication includes summaries of 57 presentations that were given orally in Spanish or presented as posters by participants from 9 countries in Latin America. Topics addressed in the symposium included results from chemical and biological control programs and studies; studies of insecticide resistance; and molecular ecological, and behavioral studies of vectors of dengue (Aedes aegypti), malaria (Anopheles albimanus and Anopheles aquasalis), leishmaniasis (Lutzomyia), and Chagas' disease (Triatoma). Related topics included biology and control of scorpions and Chironomus plumosus MH - Mexico|Nuevo Leon MH - USA MH - Venezuela PB - LAKE CHARLES: AMER MOSQUITO CONTROL ASSN INC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 8756-971X UR - ISI:000166454400004 L2 - mosquitoes;mosquito control;Aedes;Anopheles;Culex;Lutzomyia;Triatoma;scorpions;Chironomus resistance SO - Journal of the American Mosquito Control Association 2000 ;16(4):295-312 430 UI - 15122 AU - Clark WH AU - Ward DM AD - Albertson Coll, Orma J Smith Museum Nat Hist, Caldwell, ID 83605, USACICESE, Museo Entomol, Ensenada 22800, Baja California, MexicoClark, WH, Albertson Coll, Orma J Smith Museum Nat Hist, Caldwell, ID 83605 USA TI - Hurricane impacts in the Central Desert of Baja California Norte, Mexico AB - We observed damage to vegetation related to hurricane Nora in the Central Desert of Baja California Norte, Mexico, during late November 1997. The hurricane had crossed the Central Desert on September 24-29. In the El Crucero area, the hurricane blew over cirios (Fouquieria columnaris (Kell.) Curran), cardons (Pachycereus pringlei (S.Wats.) Britt. & Rose), and senitas (Lophocereus schottii (Engelm.) Britt. & Rose). Of these three, cirios were most frequently blown down. They were taller than the other plants at the site and often had stem or root damage that presumably weakened them, thus making them more susceptible. Precipitation that was much higher than normal probably soaked the upper soil profile, adding to the susceptibility of the taller plants to blowdown. This is the first record of tree blowdown from hurricanes in desert areas MH - USA MH - Mexico|Baja California PB - PAHRUMP: CACTUS SUCCULENT SOC AMER, INC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 1070-0048 UR - ISI:000089683500010 L2 - FOREST; TREEFALLS SO - Haseltonia 2000 ;(7):81-85 431 UI - 15952 AU - Cocoletzi GH AU - Ulloa SE AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USACocoletzi, GH, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Quasi-one-dimensional excitons in lateral surface-induced superlattices AB - We study the effects of an electrostatic potential designed to induce a lateral periodic modulation in a quantum well. The resulting superlattice, for small periods, is a system where quasi-one-dimensional excitons can tunnel from one effective potential well to the next and exhibit a unique center-of-mass folded dispersion which should be accessible to photoluminescence experiments. An effective-mass envelope-function approach is used to estimate resulting excitonic minibands, binding energies, and absorption coefficients for the ground and first few excited states of heavy-hole excitons. For strong electrostatic confinement, this configuration strongly polarizes the excitons, resembling a type-II superlattice where electrons and holes are spatially separated in different potential wells. A competition between quantum structural confinement and Coulomb interactions is evident in the exciton features MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000087159100096 L2 - QUANTUM-WELLS; FIELD; BINDING; STATES SO - Physical Review B 2000 ;61(19):13099-13103 432 UI - 15961 AU - Coelho FU AU - Martins MIR AU - de la Pena JA AD - Univ Sao Paulo, IME, Dept Matemat, BR-05315970 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoCoelho, FU, Univ Sao Paulo, IME, Dept Matemat, CP 66281, BR-05315970 Sao Paulo, Brazil TI - Quasitilted extensions of algebras, II MH - Brazil MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000087238700008 SO - Journal of Algebra 2000 ;227(2):582-594 433 UI - 16168 AU - Coello CA AU - Christiansen AD AD - Lab Nacl Informat Avanzada, Xalapa 91090, Veracruz, MexicoTulane Univ, Dept Comp Sci, New Orleans, LA 70118, USACoello, CA, Lab Nacl Informat Avanzada, Xalapa 91090, Veracruz, Mexico TI - Multiobjective optimization of trusses using genetic algorithms AB - In this paper we propose the use of the genetic algorithm (GA) as a tool to solve multiobjective optimization problems in structures. Using the concept of min-max optimum, a new GA-based multiobjective optimization technique is proposed and two truss design problems are solved using it. The results produced by this new approach are compared to those produced by other mathematical programming techniques and GA-based approaches, proving that this technique generates better trade-offs and that the genetic algorithm can be used as a reliable numerical optimization tool. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Veracruz MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 30 U4 - Computer Science, Interdisciplinary Applications;Engineering, Civil U5 - J;Article AV - English IS - 0045-7949 UR - ISI:000086551700008 L2 - genetic algorithms;multiobjective optimization;multicriteria optimization;vector optimization;structural optimization;truss optimization;STRUCTURAL OPTIMIZATION; OPTIMAL-DESIGN; PARAMETERS SO - Computers & Structures 2000 ;75(6):647-660 434 UI - 12554 AU - Coello CAC AU - Zavala RL AU - Garcia BM AU - Aguirre AH AD - Lab Nacl Informat Avanzada, Xalapa 91090, Veracruz, MexicoUV, LANIA, MIA, Xalapa, Veracruz, MexicoTulane Univ, EECS Dept, New Orleans, LA 70118, USACoello, CAC, Lab Nacl Informat Avanzada, Rebsamen 80,AP 696, Xalapa 91090, Veracruz, Mexico TI - Ant colony system for the design of combinational logic circuits AB - In this paper we propose an application of the Ant System (AS) to optimize combinational logic circuits at the gate level. We define a measure of quality improvement in partially built circuits to compute the distances required by the AS and we consider as optimal those solutions that represent functional circuits with a minimum amount of gates. The proposed methodology is described together with some examples taken from the literature that illustrate the feasibility of the approach MH - Mexico|Veracruz MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000171691900003 SO - Evolvable Systems: from Biology to Hardware, Proceedings 2000 ;1801():21-30 435 UI - 16421 AU - Cohen D AU - Izrailev FM AU - Kottos T AD - Harvard Univ, Dept Phys, Cambridge, MA 02138, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoMax Planck Inst Stromungsforsch, D-37073 Gottingen, GermanyCohen, D, Harvard Univ, Dept Phys, Cambridge, MA 02138, USA TI - Wave packet dynamics in energy space, random matrix theory, and the quantum-classical correspondence AB - We apply random-matrix-theory (RMT) to the analysis of evolution of wave packets in energy space. We study the crossover from ballistic behavior to saturation, the possibility of having an intermediate diffusive behavior, and the feasibility of strong localization effect. Both theoretical considerations and numerical results are presented. Using quantal-classical correspondence considerations we question the validity of the emerging dynamical picture. In particular, we claim that the appearance of the intermediate diffusive behavior is possibly an artifact of the RMT strategy MH - Germany MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085650100002 L2 - LOCALIZATION; DIFFUSION; SYSTEMS; MEDIA SO - Physical Review Letters 2000 ;84(10):2052-2055 436 UI - 15711 AU - Cojazzi P AU - Bressan A AU - Lucchin F AU - Pantano O AU - Chavez M AD - Univ Padua, Dipartimento Astron, I-35122 Padua, ItalyOsservatorio Astron Padova, I-35122 Padua, ItalyUniv Padua, Dipartimento Fis G Galilei, I-35131 Padua, ItalyINAOE, Puebla, MexicoCojazzi, P, Univ Padua, Dipartimento Astron, Vicolo Osservatorio 5, I-35122 Padua, Italy TI - Zero-metallicity stellar sources and the reionization epoch AB - We reconsider the problem of the cosmological reionization owing to stellar sources. Using a method similar to that developed by Haiman & Loeb, we investigate the effect of changing the stellar models and the stellar spectra adopted for deriving the ionizing photon production rate. In particular, we study the consequences of adopting zero-metallicity stars, which is the natural choice for the first stellar populations. We construct young isochrones representative of Population III stars from existing sets of evolutionary models (by Forieri and Cassisi & Castellani) and calculate a suitable library of zero-metallicity model atmospheres. The number of ionizing photons emitted by such a zero-metal population is about 40 per cent higher than that produced by standard metal-poor isochrones. We find that adopting suitable zero-metallicity models modifies the reionization epoch. However the latter is still largely affected by current uncertainties in other important physical processes such as the efficiency of the star formation and the fraction of escaping UV photons MH - Italy MH - Mexico|Puebla PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000088016600002 L2 - intergalactic medium;cosmology : theory;INTERGALACTIC MEDIUM; STARS; EVOLUTION; UNIVERSE; MODELS; REGIONS; HELIUM; SIGNATURES; HYDROGEN SO - Monthly Notices of the Royal Astronomical Society 2000 ;315(4):L51-L55 437 UI - 14976 AU - Colin P AU - vila-Reese V AU - Valenzuela O AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoNew Mexico State Univ, Dept Astron, Dept 4500, Las Cruces, NM 88003, USAColin, P, Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Substructure and halo density profiles in a warm dark matter cosmology AB - We performed a series of high-resolution collisionless N-body simulations designed to study the substructure of Milky Way-size galactic halos (host halos) and the density profiles of halos in a warm dark matter (WDM) scenario with a nonvanishing cosmological. constant. The virial masses of the host halos range from 3.5 x 10(12) to 1.7 x 10(12) h(-1) M-circle dot, and they have more than 10(5) particles each. A key feature of the WDM power spectrum is the free-streaming length R-f,(WDM), which fixes an additional parameter for the model of structure formation. We analyze the substructure of host halos using three R-f,R-WDM values: 0.2, 0.1, and 0.05 Mpc, and compare results to the predictions of the cold dark matter (CDM) model. We find that guest halos (satellites) do form in the WDM scenario, but are more easily destroyed by dynamical friction and tidal disruption than their counterparts in a CDM model. The small number of guest halos that we find in the WDM models with respect to the CDM one is the result of a lower guest halo accretion and a higher satellite destruction rate. These two phenomena operate almost with the same intensity in delivering a reduced number of guest halos at z = 0. For the model with R-f,R-WDM = 0.1 Mpc, the number of accreted small halos is a factor of 2.5 below that of the CDM model, while the fraction of destroyed satellites is almost twice as large as that of the CDM model. The larger the R-f,R-WDM value, the greater the size of these two effects and the smaller the abundance of satellites. Under the assumption that each guest halo hosts a luminous galaxy, we find that the observed circular velocity function of satellites around the Milky Way and Andromeda is well described by the R-f,R-WDM = 0-1 MPC WDM model. In the R-f,R-WDM - 0.1-0.2 Mpc models, the surviving guest halos at z = 0, whose masses are in the range M-h approximate to 10(9)-10(11) h(-1) M-circle dot, have an average concentration parameter c(1/5) = r(M-h)/r(M-h/5), which is approximately twice as small as that of the corresponding CDM guest halos. This difference very likely produces the higher satellite destruction rate found in the WDM models. The density profile of host halos is well described by the Navarro, Frenk, & White (NFW) fit, whereas guest halos show a wide variety of density profiles. A tendency to form shallow cores is not evident; the profiles, however, are limited by a poor mass resolution in the innermost regions where shallow cores could be expected MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 102 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165095500009 L2 - dark matter;galaxies : formation;galaxies : halos;methods : n-body simulations;GALAXIES; SUPERNOVAE; EVOLUTION; UNIVERSE; MASS; CONSTANT; OMEGA SO - Astrophysical Journal 2000 ;542(2):622-630 438 UI - 15284 AU - Colin P AU - Klypin AA AU - Kravtsov AV AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoNew Mexico State Univ, Dept Astron, Dept 4500, Las Cruces, NM 88003, USAColin, P, Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Velocity bias in a Lambda cold dark matter model AB - We use a high-resolution N-body simulation to study the velocity bias of dark matter halos, the difference in the velocity fields of dark matter and halos, in a flat low-density cold dark matter (ACDM) model. The high force, 2 h(-1) kpc, and mass, 10(9) h(-1) M., resolution allows dark matter halos to survive in very dense environments of groups and clusters, making it possible to use halos as galaxy tracers. We find that the velocity bias, b(v,12), measured as a ratio of pairwise velocities of the halos to that of the dark matter, evolves with time and depends on scale. At high redshifts (z similar to 5), halos generally move faster than the dark matter on almost all scales: b(v,12)(r) approximate to 1.2, r > 0.5 h(-1) Mpc. At later moments, the bias decreases and gets below unity on scales less than r approximate to 5 h(-1) Mpc: b(v,12)(r) approximate to (0.6-0.8) at z = 0. We find that the evolution of the pairwise velocity bias follows and probably is defined by the spatial antibias of the dark matter halos at small scales. The one-point velocity bias, b(v), defined as the ratio of the rms velocities of halos and dark matter, provides a more direct measure of the difference in velocities, ;because it is less sensitive to the spatial bias. We analyze b(v) in clusters of galaxies and find that halos are "hotter" than the dark matter: b(v) = 1.2-1.3 for r = (0.2-0.8)r(vir), where r(vir) is the virial radius. At larger radii, b(v) decreases and approaches unity at r = (1-2)r(vir). We argue that dynamical friction may be responsible for this small positive velocity bias (b(v) > 1) found in the central parts of clusters. We do not find significant systematic difference in the velocity anisotropy of halos and the dark matter. The velocity anisotropy function, beta, of dark matter particles can be approximated as beta(x)= 0.15 + 2x/(x(2) + 4), where the distance x is measured in units of the virial radius MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 45 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089252600008 L2 - galaxies : clusters : general;large-scale structure of universe;methods : n-body simulations;LARGE-SCALE STRUCTURE; HIERARCHICAL UNIVERSE; GALAXY FORMATION; EVOLUTION; CLUSTERS; SIMULATIONS; REDSHIFT; HALOES SO - Astrophysical Journal 2000 ;539(2):561-569 439 UI - 14649 AU - Collet B AU - Parrot JF AU - Taud H AD - Dept Geotecton URA 17 59, F-75252 Paris 05, FranceUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoCollet, B, Dept Geotecton URA 17 59, Case 129,4 Pl Jussieu, F-75252 Paris 05, France TI - Orientation of absolute African plate motion revealed by tomomorphometric analysis of the Ethiopian dome AB - The Ethiopian dome, comprising the Ethiopian and Yemeni Plateaus, formed as a result of the uplift of Red Sea, Gulf of Aden, and Ethiopian rift shoulders; the uplift was essentially due to a mantle-plume activity. A digital elevation model of this region before rifting, constructed by using the rotation of its constituent plates and pulling down the rift shoulders, reveals that important high areas existed before rifting. These highs are interpreted to be the result of mantle plume activity. A fast Fourier transform was used to smooth the digital elevation model prerift dome before a tomomorphometric analysis was applied to quantify the orientation of each digital elevation model horizontal slice. This procedure allowed us to determine a bearing of N30 degreesE for absolute African plate motion since the Paleogene MH - France MH - Mexico|Distrito Federal PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 5 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000165977500023 L2 - HOTSPOT TRACKS; EAST-AFRICA; MAGMATISM; ATLANTIC; GENERATION; ARABIA; PLUME; OCEAN; GULF; ADEN SO - Geology 2000 ;28(12):1147-1149 440 UI - 16451 AU - Collet B AU - Taud H AU - Parrot JF AU - Bonavia F AU - Chorowicz J AD - Univ Paris 06, Dept Geotecton, URA 17 59, F-75252 Paris 05, FranceUNAM, Inst Geog, Mexico City, DF, MexicoIRD, F-74010 Paris, FranceCollet, B, Univ Paris 06, Dept Geotecton, URA 17 59, Case 129,4 Pl Jussieu, F-75252 Paris 05, France TI - A new kinematic approach for the Danakil block using a Digital Elevation Model representation AB - Data from the literature are integrated in a regional Digital Elevation Model (DEM) in order to analyse the motion of the Danakil block with regard to the Arabian and Somalian plates. The application of the poles and angles of rotation taken from the literature, induces a superposition of the Danakil block on the Arabian plate, and the formation of a gap in the Afar region. The determination of new poles of rotation using a best-fitting procedure allows one to avoid these drawbacks. In all cases, calculations are carried out keeping the Nubian plate stationary. The present approach shows that the Danakil block is an independent entity and is not related to the Nubian and Arabian plates. Between the Oligocene and the Miocene, it has been submitted to a N20 degrees E sinistral strike-slip motion anterior to the rotation itself that was started in the middle Miocene. This rotation is directed by a mechanical couple due to the combination of the Red Sea and North Afar extensions. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000085523500006 L2 - Afar;Danakil block;Digital Elevation Model;kinematic model;sinistral strike-slip motion;EAST-AFRICAN RIFT; AFAR MANTLE PLUME; RED-SEA; CONTINENTAL-MARGIN; PLATE BOUNDARY; SOMALIA PLATE; GULF; EVOLUTION; ADEN; EXTENSION SO - Tectonophysics 2000 ;316(3-4):343-357 441 UI - 15518 AU - Colli-Serrano MT AU - Midoux N AD - CNRS, INPL, ENSIC, LSGC, F-75700 Paris, FranceInst Politecn Nacl, ESIQIE, Mexico City 07738, DF, MexicoColli-Serrano, MT, Univ Bath, Dept Chem Engn, Claverton Down, Bath BA2 7AY, Avon, England TI - Hydrodynamics and heat transfer in packed bed with co current up flow for coalescing and non-coalescing liquids. A simple model AB - Several models have been developed in the literature to describe the behaviour of the thermal conductivity of a porous bed in both single- and two-phase flow. Generally, water and air have been used to obtain the data. Here, the influence of coalescence inhibition is studied. The data is obtained with nitrogen gas and both water and aqueous solutions of pentanol (pOH) in upward flow. The experiments are performed in a packed bed electrically heated through its wall. The heat transfer parameters are obtained by fitting a two-dimensional homogeneous model to the measured profiles. The liquid hold-up is measured by conductimetric probes, using a salt tracer technique. Heat transfer in the packed bed strongly depends on the flow regime, the results obtained leading to the following experimental correlations: Lambda(r)/gamma(l) = lambda(S0)/lambda(l) + 0.06Re(1.23)Pr(0.7), (for single-phase flow), Lambda(r)/gamma(l) = lambda(S0)/lambda(l) + 0.06Re(l)(1.23)Pr(l)(0.7)34.8Re(g)/1+2.16Re(g), (for two-phase flow), valid for coalescing and non-coalescing liquids in co current up flow. Lambda(r) is the bed radial conductivity (W/mK), lambda(S0) is the bed conductivity without liquid how (W/mK) and lambda(l) is the liquid thermal conductivity(W/mK). (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0009-2509 UR - ISI:000088600500013 L2 - gas-liquid-solid reactor;packed bed;hydrodynamics;liquid hold-up;heat transfer;thermal conductivity;THERMAL-CONDUCTIVITY SO - Chemical Engineering Science 2000 ;55(19):4149-4157 442 UI - 16540 AU - Colpi M AU - Geppert U AU - Page D AD - Univ Studi Milano Bicocca, Dipartimento Fis, I-20126 Milan, ItalyAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoColpi, M, Univ Studi Milano Bicocca, Dipartimento Fis, Piazza Sci 3, I-20126 Milan, Italy TI - Period clustering of the anomalous X-ray pulsars and magnetic field decay in magnetars AB - We confront theoretical models for the rotational, magnetic, and thermal evolution of an ultramagnetized neutron star, or magnetar, with available data on the anomalous X-ray pulsars (AXPs). We argue that, if the AXPs are interpreted as magnetars, their clustering of spin periods between 6 and 12 s (observed at present in this class of objects), their period derivatives, their thermal X-ray luminosities, and the association of two of them with young supernova remnants can only be understood globally if the magnetic field in magnetars decays significantly on a timescale of the order of 10(4) yr MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 45 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000085334800008 L2 - pulsars : general;stars : magnetic fields;stars : neutron;X-rays : stars;NEUTRON-STARS; RX J0720.4-3125; DISCOVERY SO - Astrophysical Journal 2000 ;529(1):L29-L32 443 UI - 14627 AU - Combe N AU - Larralde H AD - Univ Lyon 1, Dept Phys Mat, UMR 5586, CNRS, F-69622 Villeurbanne, FranceUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoCombe, N, Univ Lyon 1, Dept Phys Mat, UMR 5586, CNRS, F-69622 Villeurbanne, France TI - Low-temperature shape relaxation of two-dimensional islands by edge diffusion AB - We present a precise microscopic description of the limiting step for low-temperature shape relaxation of two-dimensional islands in which activated diffusion of particles along the boundary is the only mechanism of transport allowed. In particular, we are able to explain why the system is driven irreversibly towards equilibrium. Based on this description, we present a scheme for calculating the duration of the limiting step at each stage of the relaxation process. Finally, we calculate numerically the total relaxation time as predicted by our results and compare it with simulations of the relaxation process MH - France MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000165995100114 L2 - ANISOTROPY; GROWTH SO - Physical Review B 2000 ;62(23):16074-16084 444 UI - 14910 AU - Comfort WW AU - Garcia-Ferreira S AD - Wesleyan Univ, Dept Math, Middletown, CT 06549, USAUNAM, Inst Matemat, Mexico City 04510, DF, MexicoComfort, WW, Wesleyan Univ, Dept Math, Middletown, CT 06549, USA TI - Dense subsets of maximally almost periodic groups AB - A (discrete) group G is said to be maximally almost periodic if the points of G are distinguished by homomorphisms into compact Hausdorff groups. A Hausdorff topology T on a group G is totally bounded if whenever; 0 not equal U is an element of T there is F is an element of [G](<) such that G = UF. For purposes of this abstract, a family D subset of or equal to P (G) with(G; T) a totally bounded topological group is a strongly extraresolvable family if (a) \D\ > \G\, (b)each D is an element of D is dense in G, and (c) distinct D; E is an element of D satisfy \D boolean AND E \ < d(G); a totally bounded topological group with such a family is a strongly extraresolvable topological group. We give two theorems, the second generalizing the first. Theorem 1. Every infinite totally bounded group contains a dense strongly extraresolvable subgroup. Corollary. In its largest totally bounded group topology, every infinite Abelian group is strongly extraresolvable. Theorem 2. Let G be maximally almost periodic. Then there are a subgroup H of G and a family D P (H) such that (i) H is dense in every totally bounded group topology on G; (ii) the family D is a strongly extraresolvable family for every totally bounded group topology T on H such that d(H; T) = \ H\; and (iii) H admits a totally bounded group topology T as in (ii). Remark. In certain cases, for example when G is Abelian, one must in Theorem 2 choose H = G. In certain other cases, for example when the largest totally bounded group topology on G is compact, the choice H = G is impossible MH - Mexico|Distrito Federal MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000165154100035 SO - Proceedings of the American Mathematical Society 2000 ;129(2):593-599 445 UI - 12725 AU - Constantino-Gonzalez MDA AU - Suthers DD AD - Monterrey Inst Technol, Ctr Artificial Intelligence, ITESM, Monterrey 64849, NL, MexicoUniv Hawaii, Honolulu, HI 96822, USAConstantino-Gonzalez, MDA, Monterrey Inst Technol, Ctr Artificial Intelligence, ITESM, E Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - A coached collaborative learning environment for entity-relationship modeling AB - We discuss the design of an agent for coaching collaborative learning in a distance learning context. The learning domain is entity-relationship modeling, a domain in which collaborative problem solving is regularly practiced, and for which there exist formally interpretable representations of problem solutions known as entity-relationship diagrams. The design of the coach was based on socio-cognitive conflict theory, which states that collaborative learning is effective to the extent that learners identify and discuss conflicts in their beliefs. Students begin by constructing individual entity-relationship diagrams expressing their solution to a database modeling problem, and then work in small groups to agree upon a group solution. The coaching agent leverages learning opportunities by encouraging students to share and discuss solution components that conflict with components of the group solution. Our work shows one way to utilize domain specific knowledge in order to facilitate collaboration MH - Mexico|Nuevo Leon MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000171336100036 SO - Intelligent Tutoring Systems, Proceedings 2000 ;1839():324-333 446 UI - 16450 AU - Contreras-Puente G AU - Vigil O AU - Ortega-Lopez M AU - Morales-Acevedo A AU - Vidal J AU - bor-Aguilera ML AD - IPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Ingn Elect, Mexico City 07738, DF, MexicoUniv La Habana, IMRE, Fac Fis, La Habana 10400, CubaContreras-Puente, G, IPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - New window materials used as heterojunction partners on CdTe solar cells AB - We present in this work the processing and characterization of two semiconductor thin films (ZnS and ZnxCd1-xO) grown by chemical bath deposition (CBD), and used as heterojunction partners on CSVT-CdTte films. The photovoltaic properties of the ZnxCd1-xO/CdTe heterojunction are reported here for the first time. The analysis of the basic properties of the films was carried out by standard optical and electrical characterization techniques. The heterojunction systems were studied by means of I-V characteristics, spectral response and quasi-static C-V measurements. Short-circuit currents of 8.9 and 22 mA/cm(2), open-circuit voltages of 0.489 V and 0.324 V, All factors of 0.29 and 0.42 and conversion efficiencies of 1.26 and 3.12% were obtained for SnO2/Zn0.9Cd0.1/CdTe and SnO2/ZnS/CdTe, respectively, under normalized 100 mW/cm(2) illumination (AM1). (C) 2000 Elsevier Science S.A. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000085457900073 L2 - CdTe solar cell;heterojunction;chemical bath deposition;BUFFER SO - Thin Solid Films 2000 ;361():378-382 447 UI - 14540 AU - Contreras-Solorio DA AU - Pavlov ST AU - Korovin LI AU - Lang IG AD - UAZ, Escuela Fis, Zacatecas 98060, Zacatecas, MexicoRussian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaPavlov, ST, UAZ, Escuela Fis, Apartado Postal C-580, Zacatecas 98060, Zacatecas, Mexico TI - Magneto-optical effects in quantum wells irradiated with light pulses AB - A method to detect and investigate the magnetopolaron effect in semiconductor quantum wells in a strong magnetic field, based on pulse light irradiation, and measuring the reflected and transmitted pulses, is proposed. It is shown that a beating amplitude on the frequencies, corresponding to the magnetopolaron energy level splitting, depends strongly on the exciting pulse width. The existence of time points of the total reflection and total transparency is predicted. High orders of the perturbation theory on electron-electromagnetic field interaction are taken into account MH - Mexico|Zacatecas MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000166307800100 L2 - EXCITONS SO - Physical Review B 2000 ;62(24):16815-16819 448 UI - 16264 AU - Contreras A AU - Salazar M AU - Leon CA AU - Drew RAL AU - Bedolla E AD - UMSNH, Inst Invest Met, Morelia, Michoacan, MexicoMcGill Univ, Dept Met Engn, Montreal, PQ, Canada TI - Kinetic study of the infiltration of aluminum alloys into TiC preforms AB - A study of the infiltration process of several alloys (Al-2024, Al-6061, and Al-7075) into preforms of TiC was carried out. The preforms were sintered for one hour under argon at 1250, 1350, and 1450 degrees C with the aim of achieving different levels of densification. Using a thermogravimetric analyzer (TGA), infiltration profiles were obtained by continuously monitoring the weight change of preforms partially immersed in molten aluminum. Infiltration was carried out at different temperatures (ranging from 900 to 1200 degrees C) under argon to evaluate infiltration kinetics. The infiltration rate of the aluminum into the preforms followed parabolic behavior and the activation energy changed according to the extent of preform densification. Average activation energies of 74, 99, and 138 k J mol(-1) were obtained for the Al-7075, Al-6061, and Al-2024 alloys, respectively. Prior to infiltration, an incubation period was observed and its length depended on the temperature; lower the infiltration temperature, longer was the incubation period MH - Canada MH - Mexico|Michoacan PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1042-6914 UR - ISI:000086214200001 L2 - AL-SI-MG; COMPOSITES; SUPERPLASTICITY; BINARY; SYSTEM; AL4C3 SO - Materials and Manufacturing Processes 2000 ;15(2):163-182 449 UI - 15099 AU - Contreras G AU - Iturriaga R AU - Paternain GP AU - Paternain M AD - Fac Ciencias, Ctr Matemat, Montevideo 11400, UruguayContreras, G, CIMAT, AP 402, Guanajuato 36000, Mexico TI - The Palais-Smale condition and Mane's critical values AB - Let L be a convex superlinear autonomous Lagrangian on a closed connected manifold N. We consider critical values of Lagrangians as defined by R. Mane in [23]. We define energy levels satisfying the Palais-Smale condition and we show that the critical value of the lift of L to any covering of N equals the infimum of the values of k such that the energy level t satisfies the 'Palais-Smale condition for every t > k provided that the Peierls barrier is finite. When the static set is not empty, the Peierls barrier is always finite and thus we obtain a characterization of the critical value of L in terms of the Palais-Smale condition. We also show that if an energy level without conjugate points has energy strictly bigger than c(u) (L) (the critical value of the lift. of k to the universal covering of N), then two different points in the universal covering can be joined by a unique solution of the Euler-Lagrange equation that lives in the given energy level. Conversely, if the latter property holds, then the energy of the energy level is greater than or equal to c(u)(L). In this way, we obtain a characterization of the energy levels where an analogue of the Hadamard theorem holds. We conclude the paper showing other applications such as the existence of minimizing periodic orbits in every non-trivial homotopy class with energy greater than c(u)(L) and homologically trivial periodic orbits such that the action of L + k is negative if c(u)(L) < k < c(a)(L), where c(a)(L) is the critical value of the lift of IL the abelian covering of N. We also prove that given an Anosov energy level, there exists in each non-trivial free homotopy class a unique closed orbit of the Euler-Lagrange flow in the given energy level MH - Mexico|Guanajuato MH - Uruguay PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 1424-0637 UR - ISI:000089774700003 L2 - LAGRANGIAN SYSTEMS; MINIMIZING MEASURES; CLOSED EXTREMALS; ORBITS SO - Annales Henri Poincare 2000 ;1(4):655-684 450 UI - 15545 AU - Contreras JG AU - Peschanski R AU - Royon C AD - CINVESTAV, IPN, Dept Fis Aplicada, Unidad Merida, Merida 97310, Yucatan, MexicoCE Saclay, CEA, Serv Phys Theor, F-91191 Gif Sur Yvette, FranceCE Saclay, Serv Phys Particules, F-91191 Gif Sur Yvette, FranceContreras, JG, CINVESTAV, IPN, Dept Fis Aplicada, Unidad Merida, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - New determination of the Pomeron intercept in hard processes AB - method allowing for a direct comparison of data with theoretical predictions is proposed for forward jet production at DESY HERA. It avoids the reconstruction of multiparton contributions by expressing the experimental cuts directly as correction factors on the QCD forward jet cross section. An application to the determination of the effective Pomeron intercept in the Balitskii-Fadin-Kuraev-Lipatov (BFKL)-leading-order (LO) parametrization from d sigma/dx data at HERA leads to a good fit with a significantly higher effective intercept, alpha(P) = 1.43 +/- 0.025(stat) +/- 0.025(syst), than for proton (total and diffractive) structure functions. Tt is, however, less than the value of the Pomeron intercept using dijets with large rapidity intervals obtained at the Fermilab Tevatron. We also evaluate the rapidity veto contribution to the higher-order BFKL corrections. The method can he extended to other theoretical inputs MH - France MH - Mexico|Yucatan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088516300024 L2 - HEAVY-QUARK PRODUCTION; SMALL-X; BFKL POMERON; DIPOLE PICTURE; INFINITE-MOMENTUM; JET PRODUCTION; HERA; DYNAMICS; EQUATION; SCATTERING SO - Physical Review D 2000 ;6203(3): 451 UI - 15497 AU - Contreras R AU - Jimenez-Perez VM AU - Camacho-Camacho C AU - Guizado-Rodriguez M AU - Wrackmeyer B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv A Metropolitana Xodimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoUniv Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyContreras, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - Rigid five-coordinate diorganotin derivatives of oxalic acid diamides, studied by Sn-119-NMR and X-ray structural analysis AB - Bis(2-hydroxy-3, 5-di-tert-butyl-phenylanilido) oxalic acid reacts with diorganotin dichlorides, R2SnCl2, in the presence of triethylamine to give the polycyclic bis(diorganotin) derivatives 1, in which the surroundings of each tin atom correspond to a distorted trigonal bipyramid with one nitrogen and two carbon atoms in the equatorial and two oxygen atoms in the axial positions. The solid state structure was established for la (R = Me) by X-ray analysis, and the agreement between the Sn-119 chemical shift in the solid state and in solution suggests that this structure is retained in solution. It was possible for the first time to determine isotope-induced chemical shifts (1)Delta(12/13)C(Sn-119) for five-coordinate tin nuclei at natural. abundance of C-13. A positive sign of (1)Delta(12/13)C(Sn-119) was found for R = Me (1a), Bu (1b) and Ph (1c). (C) 2000 Elsevier Science S.A. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000088590600014 L2 - tin;amides;NMR;isotope effects;X-ray;POLARIZATION TRANSFER; MAGNETIC-RESONANCE; NMR-SPECTRA; COUPLING-CONSTANTS; C-13; ENHANCEMENT; STATE; PARAMETERS; NUCLEI SO - Journal of Organometallic Chemistry 2000 ;604(2):229-233 452 UI - 15884 AU - Copetti MVF AU - Mallmann JAH AU - Schmidt AA AU - Castaneda HO AD - Univ Fed Santa Maria, Lab Anal Numer & Astrofis, Dept Matemat, BR-97119900 Santa Maria, RS, BrazilUniv Ijui, Dept Fis Estatist & Matemat, BR-98700000 Ijui, RS, BrazilUniv Nacl Autonoma Mexico, Astron Inst, Ensenada 22860, Baja California, MexicoCopetti, MVF, Univ Fed Santa Maria, Lab Anal Numer & Astrofis, Dept Matemat, BR-97119900 Santa Maria, RS, Brazil TI - Internal variation of electron density in galactic HII regions AB - A study on the internal variation of the electron density in galactic I-III regions has been conducted on a sample of 15 objects of different sizes and evolutionary stages. The [S II] lambda 6716/lambda 6731 line ratio was adopted as electron density indicator. Long slit spectrophotometry of high signal-to-noise ratio with spectral dispersion of 0.75 Angstrom pxl(-1) and spatial scale of 0." 90 pxl(-1) were obtained at different slit positions and orientations. No systematic spatial variation of electron density was detected in nearly half of the objects studied (S 255, S 257, S 271, S 285, S 301, S 305, NGC 3372 and IC 1275). They are in general the most diffuse and probably evolved objects with low mean densities in the range N-e approximate to 20-140 cm(-3). The remaining objects (S 288, S 307; NGC 2579, NGC 3503, Gum 62, Gum 64a and M 20) with mean densities N-e approximate to 80-360 cm(-3), have shown a statistically significant electron density dependence on position. In most of these cases, the spatial variation of density may be interpreted as a radial gradient with the density decreasing from the centre to the edges. M 20 shows a systematic non-radial variation of electron density with maximum values occurring at its prominent dark lanes. A mean filling factor of the order of phi = 0.1 was found compatible with the data. Based on their density profiles, NGC 2579, Gum 62, Gum 64a and possibly NGC 3503 were indicated as candidates of showing a 'champagne flow' MH - Brazil MH - Mexico|Baja California PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000087515600029 L2 - ISM : general;ISM : HII regions;H-II-REGIONS; CHEMICAL-COMPOSITION; OPEN CLUSTERS; GASEOUS NEBULAE; CARINA-NEBULA; H-2 REGIONS; O-STARS; EMISSION; PHOTOMETRY; GALAXY SO - Astronomy and Astrophysics 2000 ;357(2):621-636 453 UI - 16042 AU - Corbacho AM AU - Nava G AU - Eiserich JP AU - Noris G AU - Macotela Y AU - Struman I AU - de la Escalera GM AU - Freeman BA AU - Clapp C AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla Queretaro 76001, Qro, MexicoUniv Alabama, Dept Anesthesiol, Birmingham, AL 35233, USAUniv Alabama, Dept Biochem, Birmingham, AL 35233, USAUniv Alabama, Dept Mol Genet, Birmingham, AL 35233, USAUniv Alabama, Ctr Free Rad Biol, Birmingham, AL 35233, USAUniv Liege, Lab Biol Mol & Genie Genet, B-4000 Sart Tilman Par Liege, BelgiumClapp, C, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Juriquilla Queretaro 76001, Qro, Mexico TI - Proteolytic cleavage confers nitric oxide synthase inducing activity upon prolactin AB - Prolactin (PRL), originally associated with milk secretion, is now known to possess a wide variety of biological actions and diverse sites of production beyond the pituitary, Proteolytic cleavage is a common post-translational modification that can either activate precursor proteins or confer upon the peptide fragment unique biological actions not exerted by the parent molecule. Recent studies have demonstrated that the 16-kDa N-terminal proteolytic cleavage product of PRL (16K-PRL) acts as a potent inhibitor of angiogenesis. Despite previous demonstrations of 16K-PRL production in vivo, biological functions beyond its antiangiogenic actions remain unknown. Here we show that 16K-PRL, but not full-length PRL, acts to promote the expression of the inducible isoform of nitric oxide synthase (iNOS) and nitric oxide ((NO)-N-.) production by pulmonary fibroblasts and alveolar type II cells with potency comparable with the proinflammatory cytokines interleukin-1 beta, interferon gamma, and tumor necrosis factor alpha. The differential effect of 16K-PRL versus PRL occurs through a receptor distinct from known PRL receptors. Additionally, pulmonary fibroblasts express the PRL gene and endogenously produce 16K-PRL, suggesting that this pathway may serve both autocrine and paracrine roles in the regulation of (NO)-N-. production. These results reveal that proteolytic cleavage of PRL confers upon this classical hormone potent iNOS inducing activity, suggesting its role in inflammatory/immune processes MH - Belgium MH - Mexico|Queretaro MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000086925300006 L2 - CAPILLARY ENDOTHELIAL-CELLS; SMOOTH-MUSCLE CELLS; GROWTH-HORMONE; RAT LUNG; ANGIOGENESIS; FRAGMENT; EXPRESSION; INHIBITOR; RECEPTOR; INTERLEUKIN-1-BETA SO - Journal of Biological Chemistry 2000 ;275(18):13183-13186 454 UI - 14324 AU - Cordero S AU - Kornhauser I AU - Felipe C AU - Esparza JM AU - Dominguez A AU - Riccardo JL AU - Rojas F AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Condensation-evaporation processes in simulated heterogeneous three-dimensional porous networks AB - Heterogeneous three-dimensional porous networks consisting of void entities endowed with variations in both size and coordination number and allowing for geometrical restrictions are constructed. The condensation-evaporation behaviour of a fluid is simulated inside these topologically heterogeneous porous substrata. Morphologies of the liquid and gas phases, at a certain stage of the sorption process, are visualized through domain complexion diagrams MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000166937400013 L2 - MEDIA SO - Characterization of Porous Solids V 2000 ;128():121-130 455 UI - 15211 AU - Coreno-Alonso O AU - Cabanas-Moreno JG AU - Cruz-Rivera JJ AU - Calderon HA AU - Umemoto M AU - Tsuchiya K AU - Quintana-Molina S AU - Falcony C AD - Inst Politecn Nacl, Dept Mat Sci, ESFM, Mexico City 07300, DF, Mexico. Inst Politecn Nacl, Unidad Prof ALM, ESIQIE, Mexico City 07338, DF, Mexico. Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan. IPN, CINVESTAV, Dept Phys, Mexico City 07738, DF, Mexico TI - Characterization of NiAl intermetallic produced by mechanical alloying and consolidated by spark plasma sintering AB - Bulk specimens of the NiAl intermetallic compound were produced by two different processing routes. In the first one, elemental powder mixtures were mechanically alloyed to produce powders of the intermetallic phase, which were subsequently hot consolidated by spark plasma sintering. In the second route, elemental powder mixtures were milled for times shorter than those required for the formation of the NiAl intermetallic; similarly, these mixtures were then processed by spark plasma sintering. Density, hardness and microstructure of the consolidated products resulting from both processing routes were characterized and compared. It was found that the second processing route yielded consolidated specimens having higher hardness, while with the first processing route slightly higher densification levels were achieved MH - Japan MH - Mexico|Distrito Federal T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle5BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMPart 1&2BQ75R AV - English IS - 0255-5476 UR - ISI:000089403900099 L2 - hot consolidation;mechanical alloying;nanostructure;nickel aluminides SO - 2000 ;():635-640 456 UI - 14798 AU - Cornejo L AU - Garca E AU - Chavira S AU - Muenke M AU - Saavedra D AD - Autonomous Hidalgo State Univ, Sch Med, Sci Hlth Inst, Pachuca De Soto, MexicoIMSS, CIBO, W Biol Res Ctr, Guadalajara, Jalisco, MexicoIMSS, CIBO, Mexican Social Segur Inst, Guadalajara, Jalisco, MexicoGen Hosp Dr Manuel Gea Gonzalez, Mexico City, DF, MexicoNHGRI, Clin Genet Branch, NIH, Bethesda, MD 20892, USA TI - Clinical data and molecular analysis in twenty-four Mexican Apert syndrome patients MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Hidalgo MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400700688 SO - American Journal of Human Genetics 2000 ;67(4):133-133 457 UI - 16235 AU - Corrales TA AU - Aunon JI AD - Univ Alabama, Coll Engn, Huntsville, AL 35899, USAUniv Autonoma Metropolitana, Dept Elect Engn, Mexico City 09340, DF, MexicoAunon, JI, Univ Alabama, Coll Engn, Huntsville, AL 35899, USA TI - Nonlinear system identification and overparameterization effects in multisensory evoked potential studies AB - Traditional signal processing techniques have not been suitable in establishing contributions from different sensory paths in multisensory evoked potentials, Ln this paper, a nonlinear modeling technique is proposed to demonstrate the possible mechanisms of interaction between sensory paths, The nonlinear autoregressive with exogenous inputs (NARX) model is explored to establish a relationship between electrical activities of the brain obtained by unimodal and by bimodal stimulation, The intersensory phenomenon concept is extended using nonlinear system theory and applied to show the possible interactions between the visual and auditory sensory paths. In addition, the paper addresses the compensation phenomenon caused bg overparameterization in the NARX algorithm when it is applied to event-related potentials. It is hoped that the nonlinear modeling approach will generate hypotheses about the intersensory interaction phenomenon, improving and advancing its theoretical formulation MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Biomedical U5 - J;Article AV - English IS - 0018-9294 UR - ISI:000086291800006 L2 - intersensory interaction phenomenon;multisensory evoked potentials;nonlinear autoregressive modeling;EVENT-RELATED POTENTIALS; ATTENTION; MODELS; ALGORITHM SO - Ieee Transactions on Biomedical Engineering 2000 ;47(4):472-486 458 UI - 15467 AU - Correa-Cerro LS AU - Kennerknecht I AU - Just W AU - Vogel W AU - Muller D AD - Univ Ulm, Dept Med Genet, D-89069 Ulm, GermanyUniv Guadalajara, Doctorado Genet Humana, Guadalajara 44430, Jalisco, MexicoKlinikum Chemnitz, Sauglingsklin, Chemnitz, GermanyVogel, W, Univ Ulm, Dept Med Genet, Albert Einstein Allee 11, D-89069 Ulm, Germany TI - The gene for branchio-oculo-facial syndrome does not colocalise to the EYA1-4 genes MH - Germany MH - Mexico|Jalisco PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity U5 - J;Letter AV - English IS - 0022-2593 UR - ISI:000088684100015 L2 - DROSOPHILA EYES ABSENT; BRANCHIOOCULOFACIAL SYNDROME; BOR SO - Journal of Medical Genetics 2000 ;37(8):620-623 459 UI - 14872 AU - Cortes-Blanco A AU - Martinez-Lazaro R AU - Martinez-Duncker C AD - Hosp Infantil Mexico Federico Gomez, Dept Med Nucl Mol, Mexico City 06720, DF, MexicoHosp Univ Miguel Servet, Nucl Med Serv, Zaragoza, SpainMartinez-Duncker, C, Hosp Infantil Mexico Federico Gomez, Dept Med Nucl Mol, Dr Marquez 162,Col Doctores, Mexico City 06720, DF, Mexico TI - Unusual diffuse [I-131]MIBG accumulation in a kidney with renal artery stenosis MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Transplantation;Urology & Nephrology U5 - J;Article AV - English IS - 0931-0509 UR - ISI:000165282200034 L2 - false-positive result;[I-131]MIBG scan;renal artery stenosis;I-123 METAIODOBENZYLGUANIDINE; I-131 METAIODOBENZYLGUANIDINE; BODY SCAN; PHEOCHROMOCYTOMA SO - Nephrology Dialysis Transplantation 2000 ;15(11):1885-1886 460 UI - 15654 AU - Cortes E AU - Becerra MI AU - Osornio YM AU - Diaz E AU - Jankowski K AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoDept Chim & Biochim, Moncton, NB E1A 3E9, CanadaDiaz, E, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - 2D NMR analysis of highly restricted internal rotation in 2-methylthio-3H-4-p-bromophenyl)-7-[(ortho- and para-substituted)-phenylthio]-1,5-benzodiazepines AB - The complete assignments of twelve 4-aryl-7-thioaryl-1,5-benzodiazepines H-1 and C-13 spectra, performed with the use of high resolution variable solvent and temperature 1D and 2D techniques (e.g. HOMOCOSY, NOESY, HMQC and HMBC), lead to the determination of conformational equilibria between two rotamers having the aromatic ring of the thioaryl oriented in a perpendicular or helical orientation toward the benzodiazepine ring. The restricted rotation was evaluated from the population of these conformers. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000088091300001 L2 - NMR analysis;high resolution techniques;restricted rotation;SPECTRAL PROPERTIES; SIZE SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2000 ;56(9):1661-1673 461 UI - 16266 AU - costa-Mejia CA AU - Pignatiello JJ AD - Inst Tecnol Autonomo Mexico, Dept Ind Engn, Mexico City 01000, DF, MexicoFlorida A&M Univ, Florida State Univ, Dept Ind Engn, Tallahassee, FL 32310, USAAcosta-Mejia, CA, Inst Tecnol Autonomo Mexico, Dept Ind Engn, Mexico City 01000, DF, Mexico TI - Monitoring process dispersion without subgrouping AB - In this paper we analyze several control charts suitable for monitoring process dispersion when subgrouping is not possible or not desirable. We compare the performances of a moving range chart, a cumulative sum (CUSUM) chart based on moving ranges, a CUSUM chart based on an approximate normalizing transformation. a self-starting CUSUM chart, a change-point CUSUM chart, and a exponentially weighted moving average chart based on the subgroup variance. The average run length performances of these charts are also estimated and compared MH - Mexico|Distrito Federal MH - USA PB - MILWAUKEE: AMER SOC QUALITY CONTROL-ASQC RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Industrial;Operations Research & Management Science;Statistics & Probability U5 - J;Article AV - English IS - 0022-4065 UR - ISI:000086234400001 L2 - cumulative sum;individual measurement;moving ranges;process variability;CONTROL CHARTS; CUSUM SO - Journal of Quality Technology 2000 ;32(2):89-102 462 UI - 15546 AU - Cotti U AU - az-Cruz JL AU - Toscano JJ AD - UMSNH, IFM, Morelia 58040, Michoacan, MexicoSISSA, ISAS, I-34013 Trieste, ItalyIPN, CINVESTAV, Dept Fis, Mexico City 07738, DF, MexicoBUAP, Inst Fis, Puebla 72570, MexicoBUAP, Fac Ciencias Fis Matemat, Puebla, MexicoCotti, U, UMSNH, IFM, AP 2-82, Morelia 58040, Michoacan, Mexico TI - Production of neutral and charged Higgs bosons of the MSSM at future e gamma colliders AB - A complete study for the production of neutral [h(0),H-0,A(0)(=phi(i)(0))] and charged Higgs (H+/-) bosons at electron-photon colliders is presented in the context of the minimal supersymmetric standard model. A particular choice of the nonlinear R-xi gauge is used to evaluate the amplitudes of the reaction e gamma --> phi(i)(0). The resulting cross section indicates that it will be possible to detect a signal from the neutral Higgs bosons for most regions of parameter space at the future linear colliders with root s = 500 GeV through the reaction e gamma --> e phi(i)(0). This reaction also offers the interesting possibility of measuring the Higgs boson mass through the detection of the outgoing electron. The production of the charged Higgs boson (H+) through the reaction e gamma --> v(e)H(+/-) has in general smaller values for the cross section, which seems more difficult to observe MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088516300059 L2 - SUPERSYMMETRIC STANDARD MODEL; R-XI-GAUGE; LINEAR COLLIDERS; RADIATIVE-CORRECTIONS; HADRON COLLIDERS; MASS; LHC; PHYSICS; SEARCHES; TEVATRON SO - Physical Review D 2000 ;6203(3): 463 UI - 16346 AU - Coureaud G AU - Schaal B AU - Coudert P AU - Rideaud P AU - Fortun-Lamothe L AU - Hudson R AU - Orgeur P AD - INRA, Lab Comportement Anim, CNRS, URA 1291,Stn Physiol Reprod, F-37380 Nouzilly, FranceINRA, Unite Expt Pathol Anim, F-17700 Surgeres, FranceINRA, Lab Pathol Lapin, Pathol Aviaire & Parasitol Stn, F-37380 Nouzilly, FranceINRA, Stn Rech Cunicoles, Castanet Tolosan, FranceUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoSchaal, B, INRA, Lab Comportement Anim, CNRS, URA 1291,Stn Physiol Reprod, F-37380 Nouzilly, France TI - Immediate postnatal sucking in the rabbit: Its influence on pup survival and growth AB - This study was aimed at characterising the impact of immediate postnatal sucking on pup survival and development. The interactive effects of postnatal success with the day 0 weight of pups, the nest-access regimen (controlled or free) or parity of females was investigated. Pups (n = 900) were categorised according to their initial ingestion of colostrum. In primiparous does: (I) pup mortality between d0-d10 was higher for unsuccessful than for successful early suckers; (2) lighter d0-weight reduced survival for unsuccessful but not for successful pups; (3) free nest-access of females annihilated the survival advantage fostered by the initial sucking success. In secondiparous does, these impacts waned. Finally, whatever the does' parity, only d0-weight influenced pup weight-gain between d0-21. Thus, pup survival seemed to depend (at least in primiparae) on their ability to suck right after birth, and to display a pattern of energy saving without being disturbed by the females' nest entries MH - France MH - Mexico|Distrito Federal PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 17 U4 - Developmental Biology;Nutrition & Dietetics;Reproductive Biology;Zoology U5 - J;Article AV - English IS - 0926-5287 UR - ISI:000085961400003 L2 - rabbit (Oryctolagus cuniculus);newborn;sucking;colostrum;survival;growth;NEWLY BORN LAMBS; SUCKLING BEHAVIOR; NURSING BEHAVIOR; MOTHER; PATTERNS; BIRTH SO - Reproduction Nutrition Development 2000 ;40(1):19-32 464 UI - 15577 AU - Criado-Sancho M AU - Jou D AU - del Castillo LF AU - Casas-Vazquez J AD - Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, SpainUNED, Dept Ciencias & Tecn Fisicoquim, Madrid 28040, SpainInst Estudis Catalans, Barcelona 08001, Catalonia, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoJou, D, Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, Spain TI - Shear induced polymer migration: analysis of the evolution of concentration profiles AB - In order to analyze the evolution of the concentration profile experimentally observed by MacDonald and Muller under shear-induced polymer migration in a rotating cone-and-plate device, we use a constitutive equation for the diffusion flux, where the gradient of a generalized non-equilibrium chemical potential appears instead of the concentration gradient. From this model of coupling between diffusion and viscous pressure, together with the mass balance equation, we derive some general features of the concentration profile, the temporal behavior of the polymer concentration near the apex of the cone and some relevant trends of the dynamical process of polymer migration. (C) 2000 Elvevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000088375900030 L2 - polymer migration;non-equilibrium chemical potential;cone-and-plate;EXTENDED IRREVERSIBLE THERMODYNAMICS; TRANSPORT PROCESSES; PHASE-SEPARATION; FLOW SO - Polymer 2000 ;41(23):8425-8432 465 UI - 14715 AU - Crich D AU - Neelamkavil S AU - Sartillo-Piscil F AD - Univ Illinois, Dept Chem, Chicago, IL 60607, USAUniv Autonoma Puebla, Fac Ciencias Quim, Unidad Invest Sintesis Organ, Puebla 72570, MexicoCrich, D, Univ Illinois, Dept Chem, 845 W Taylor St, Chicago, IL 60607 USA TI - Efficient conversion of vicinal diols to alkenes by treatment of the corresponding dimesylates with a catalytic, minimally fluorous, recoverable diaryl diselenide and sodium borohydride AB - In conjunction with sodium borohydride as stoichiometric reagent a catalytic quantity of bis(4-perfluorohexylphenyl) diselenide converts vicinal dimesylates to the corresponding alkenes in good yield on warming in ethanol, The diselenide is recovered in high yield by continuous fluorous extraction MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1523-7060 UR - ISI:000165829200020 L2 - NUCLEOSIDE 2',3'-DIMESYLATES; 2',3'-DIDEHYDRO-2',3'-DIDEOXYNUCLEOSIDES; SEPARATION SO - Organic Letters 2000 ;2(25):4029-4031 466 UI - 15377 AU - Croft KD AU - Mcgiff JC AU - Sanchez-Mendoza A AU - Carroll MA AD - New York Med Coll, Dept Pharmacol, Valhalla, NY 10595, USAUniv Western Australia, Dept Med, Perth, WA 6847, AustraliaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoCarroll, MA, New York Med Coll, Dept Pharmacol, Valhalla, NY 10595, USA TI - Angiotensin II releases 20-HETE from rat renal microvessels AB - We studied hydroxyeicosatetraenoic acid (HETE) release in response to ANG II from preglomerular microvessels (PGMVs), the vascular segment governing changes in renal vascular resistance. PGMVs were isolated from Sprague-Dawley rats and incubated with NADPH and hormones at 37 degrees C. Eicosanoids were extracted, and cytochrome P-450 (CYP)-derived HETEs were purified and quantitated by negative chemical ionization gas chromatography-mass spectroscopy. PGMVs produced primarily 20- and 19-HETEs, namely, 7.9 +/- 1.7 and 2.2 +/- 0.5 ng/mg protein, respectively. ANG II (5 nM) increased CYP-HETE release by two- to threefold; bradykinin, phenylephrine, and Ca2+ ionophore were without effect. [Sar(1)]ANG II (0.1-100 mu M) dose dependently stimulated 19- and 20- HETEs, an effect blocked by the AT(2)-receptor antagonist PD-123319 as well as by U-73122, a phospholipase C inhibitor. Microvascular 20- HETE release was increased more than twofold by the third day in response to ANG II (120 ng.kg(-1).min(-1)) infused subcutaneously for 2 wk; it was not further enhanced after 14 days, although blood pressure continued to rise. Thus an AT(2)-phospholipse C effector unit is associated with synthesis of a vasoconstrictor product, 20- HETE, in a key renovascular segment MH - Australia MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 65 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000089033900016 L2 - kidney;arachidonic acid metabolism;angiotensin II receptors;arteries;gas chromatography-mass spectroscopy;THICK ASCENDING LIMB; APICAL K+ CHANNEL; ARACHIDONIC-ACID; TYPE-2 RECEPTOR; ARCUATE ARTERIES; EPITHELIAL-CELLS; CONSCIOUS RATS; KIDNEY; METABOLITES; CYTOCHROME-P450 SO - American Journal of Physiology-Renal Physiology 2000 ;279(3):F544-F551 467 UI - 14886 AU - Cronin K AU - Abodayeh K AU - Caro-Corrales J AU - Pokrovskii A AU - Demir A AD - Natl Univ Ireland Univ Coll Cork, Dept Food Engn, Cork, IrelandInst Politecn Nacl, Mexico City, DF, MexicoUniv Autonoma Sinoloa, Mexico City, DF, MexicoNatl Univ Ireland Univ Coll Cork, Inst Nonlinear Sci, Cork, Ireland TI - Probabilistic studies of the thermal processing of discrete solid products AB - The evolution of variability in the centre temperature of discrete solid products during a batch thermal process is investigated. A simple deterministic model of transient heat transfer in a discrete solid body is outlined. Theoretical solutions based on functions of random variables are derived to characterize the output of such a thermal process where the rate constant is randomly distributed. The solutions an validated by being compared to experimentally measured temperature dispersion. The utility of the approach in improving the design of non-deterministic thermal processes is outlined MH - Ireland MH - Mexico|Distrito Federal PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0960-3085 UR - ISI:000165378100003 L2 - probabilistic modelling;heat transfer;process design;FOODS SO - Food and Bioproducts Processing 2000 ;78(C3):126-132 468 UI - 16634 AU - Cruces ALL AU - De Arriaga F AD - Univ Autonoma Metropolitana Azcapotzalco, Dept Sistemas, Mexico City 02200, DF, MexicoUniv Politecn Madrid, Dept Mat Aplicada Tecnol Informac, E-28040 Madrid, SpainCruces, ALL, Univ Autonoma Metropolitana Azcapotzalco, Dept Sistemas, Av San Pablo 180, Mexico City 02200, DF, Mexico TI - Reactive agent design for intelligent tutoring systems AB - This paper presents a new approach to the analysis and design of intelligent tutoring systems (ITS), based on reactive principles and cognitive models, this way leading to multiagent architecture. In these kinds of models, the analysis problem is treated bottom-up, as opposed to that of traditional artificial intelligence (AI), i.e., top down. We present one ITS example called Makatsina (meaning tutor in TOTONACA, a Mexican pre-Columbian language), constructed according to this approach, which teaches the skills necessary to solve the truss analysis problem by the method of joints. This learning domain is an integration skill. The classical ITS work is based on explicit goals and an internal representation of the environment. The new approach has reactive agents which have no representation of their environment and act using a stimulus/response behavior type. In this way they can respond to the present state of the environment in which they are embedded. With these elements, errors, and teaching plans, each agent behaves as an expert assistant that is able to handle different teaching methods. Reactive agent programming is found to be simple because agents have simple behaviors. The difficulty lies in the interaction mechanism analysis and design between the environment and the intelligent reactive system MH - Mexico|Distrito Federal MH - Spain PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0196-9722 UR - ISI:000084788800001 L2 - COMPUTER SO - Cybernetics and Systems 2000 ;31(1):1-47 469 UI - 16331 AU - Cruells M AU - Roca A AU - Patino F AU - Salinas E AU - Rivera I AD - Univ Barcelona, Dept Engn Quim & Met, E-08028 Barcelona, SpainUniv Autonoma Hidalgo, Inst Ciencias Tierra, Pachuca, Hidalgo, MexicoRoca, A, Univ Barcelona, Dept Engn Quim & Met, Marti & Franques 1, E-08028 Barcelona, Spain TI - Cyanidation kinetics of argentian jarosite in alkaline media AB - The cyanidation of argentian potassium jarosite in alkaline media is characterized by an induction period, followed by a conversion period, as was observed in other synthetic jarosites. The induction period shows an apparent order of 0.7 (NaOH) and 0.2 [Ca(OH)(2)] with respect to the [OH-], and an apparent activation energy of 86 kJ mol(-1) (NaOH) and 36 kJ mol(-1) [Ca(OH)(2)]. The conversion period is characterized by the presence of a reaction front with an unreacted jarosite core. The decomposition products are amorphous. The process is chemically controlled in both media. In NaOH-CN-, the order of reaction is 0.6 with respect to the [OH-] and the activation energy is 43 kJ mol(-1). in Ca(OH)(2)-CN-, the order of reaction with respect to [OH-] is 0.5 and the activation energy is 80 kJ mol(-1). The order of reaction with respect to the [CN-] concentration is zero in both media. The process is faster than that observed in natural arsenical potassium jarosite from gossan ores (Rio Tinto, Spain). The addition of potassium chloride to the reaction system increases the reaction rate; the order of reaction with respect to the [Cl-] was 0.13. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0304-386X UR - ISI:000086036800003 L2 - cyanidation;kinetics;potassium jarosite;jarosite;GOSSAN ORES; RIO-TINTO; PRECIPITATION SO - Hydrometallurgy 2000 ;55(2):153-163 470 UI - 15145 AU - Cruz-Almanza R AU - Miranda LD AU - varez-Garcia A AU - Muchowski JM AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRoche Biosci, Palo Alto, CA 94304, USA TI - Intramolecular oxidative radical acylation of 2-methylsulfonylpyrroles MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246200845 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U161-U161 471 UI - 15992 AU - Cruz-Pacheco G AU - Minzoni A AU - Padilla P AU - Corichi A AU - Rosenbaum M AU - Ryan MP AU - Smyth NF AD - Univ Nacl Autonoma Mexico, FENOMEC IIMAS, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, FENOMEC, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Edinburgh, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandCruz-Pacheco, G, Univ Nacl Autonoma Mexico, FENOMEC IIMAS, A Postal 20-726, Mexico City 04510, DF, Mexico TI - Effect of low momentum quantum fluctuations on a coherent field structure AB - In the present work the evolution of a coherent held structure of the sine-Gordon equation under quantum fluctuations is studied. The basic equations an derived from the coherent state approximation to the functional Schrodinger equation for the field. These equations are solved asymptotically and numerically for three physical situations. The first is the study of the nonlinear mechanism responsible for the quantum stability of the soliton in the presence of low momentum fluctuations. The second considers the scattering of a wave by the soliton. Finally the third problem considered is the collision of solitons and the stability of a breather. It is shown that the complete integrability of the sine-Gordon equation precludes fusion and splitting processes in this simplified model. The approximate results obtained are non-perturbative in nature, and are valid for the full nonlinear interaction in the limit of low momentum fluctuations. It is also found that these approximate results are in good agreement with full numerical solutions of the governing equations. This suggests that a similar approach could be used for the baby Skyrme model, which is not completely integrable. In this case the higher space dimensionality and the internal degrees of freedom which prevent the integrability will be responsible for fusion and splitting processes. This work provides a starting point in the numerical solution of the full quantum problem of the interaction of the field with a fluctuation MH - Mexico|Distrito Federal MH - United Kingdom PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000087046300048 L2 - SINE-GORDON; VARIATIONAL APPROACH; CURRENT-ALGEBRA; SKYRME MODEL; PHASE-SHIFTS; EVOLUTION; SCATTERING; BARYONS; SPACE SO - Physical Review D 2000 ;6110(10): 472 UI - 15880 AU - Cruz C AU - Nijmeijer H AD - CICESE, Sci Res & Adv Studies Ensenada, Elect & Telecommun Dept, Ensenada 22860, Baja California, MexicoUniv Twente, CJ Drebbel Inst, Fac Math Sci, NL-7500 AE Enschede, NetherlandsEindhoven Univ Technol, Fac Mech Engn, NL-5600 MB Eindhoven, NetherlandsCruz, C, CICESE, Sci Res & Adv Studies Ensenada, Elect & Telecommun Dept, Km 107,Carretera Tijuana, Ensenada 22860, Baja California, Mexico TI - Synchronization through filtering AB - We study the synchronization problem in discrete-time via an extended Kalman filter (EKF). That is, synchronization is obtained of transmitter and receiver dynamics in case the receiver is given via an EKF that is driven by a noisy drive signal from a noisy transmitter dynamics. The convergence of the filter dynamics towards the transmitter dynamics is rigorously shown using recent results in extended Kalman filtering. Two extensive simulation examples show that the filter is indeed suitable for synchronization of (noisy) chaotic transmitter dynamics. An application to private communication is also given MH - Mexico|Baja California MH - Netherlands PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 10 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000087580800005 L2 - EXTENDED KALMAN FILTER; CHAOTIC SYSTEMS; RING CAVITY; OBSERVER; BEHAVIOR SO - International Journal of Bifurcation and Chaos 2000 ;10(4):763-775 473 UI - 14766 AU - Cruz SL AU - Balster RL AU - Woodward JJ AD - Virginia Commonwealth Univ, Dept Pharmacol & Toxicol, Richmond, VA 23298, USAIPN, CINVESTAV, Dept Farmacol & Toxicol, Mexico City 14000, DF, MexicoWoodward, JJ, Virginia Commonwealth Univ, Dept Pharmacol & Toxicol, Med Coll Virginia Campus, Richmond, VA 23298 USA TI - Effects of volatile solvents on recombinant N-methyl-D-aspartate receptors expressed in Xenopus oocytes AB - 1 We have previously shown that toluene dose-dependently inhibits recombinant N-methyl-D-aspartate (NMDA) receptors at micromolar concentrations. This inhibition was rapid, almost complete and reversible. The NR1/2B combination was the most sensitive receptor subtype tested with an IC50 value for toluene of 0.17 mM. 2 We now report on the effects of other commonly abused solvents (benzene, m-xylene, ethylbenzene, propylbenzene. 1,1,1-trichlorethane (TCE) and those of a convulsive solvent, 2,2,2-trifluororthyl ether (flurothyl), on NMDA-induced currents measured in Xenopus oocytes expressing NR1/2A or NR1/2B receptor subtypes. 3 All of the alkylbenzenes and TCE produced a reversible inhibition of NMDA-induced currents that was dose- and subunit-dependent, The NR1/2B receptor subtype was several times more sensitive to these compounds than the NR1/2A subtype. 4 The convulsant solvent flurothyl had no effect on NMDA responses in oocytes but potently inhibited ion flux through recombinant GABA receptors expressed in oocytes. 5 Overall, these results suggest that abused solvents display pharmacological selectivity and that NR1/2B NMDA receptors may be an important target for the actions of these compounds on the brain MH - Mexico|Distrito Federal MH - USA PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 33 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000165717700008 L2 - inhalants;benzene;ethylbenzene;propylbenzene;m-xylene;1,1,1-TCE;flurothyl;NMDA receptors;INHALANT ABUSE; AROMATIC-HYDROCARBONS; ETHANOL SENSITIVITY; TOLUENE; XYLENE SO - British Journal of Pharmacology 2000 ;131(7):1303-1308 474 UI - 14430 AU - Cseh J AU - Levai G AU - Algora A AU - Hess PO AU - Intasorn A AU - Kato K AD - Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSrinakharinwirot Univ, Bangkok 10110, ThailandHokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido 060, JapanCseh, J, Hungarian Acad Sci, Inst Nucl Res, PF 51, H-4001 Debrecen, Hungary TI - On the shell-model connection of the cluster model AB - We show that the cluster model can be derived from the spherical shell model not only for harmonic oscillator interactions, but for much more realistic Hamiltonians as well, which have dynamically broken U(3) symmetry. This connection justifies a U(3) selection rule for cluster states, and its usefulness is illustrated in studies of heavy ion resonances MH - Hungary MH - Japan MH - Mexico|Distrito Federal MH - Thailand PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000166658800006 L2 - cluster model;shell model;U(3) symmetry;heavy ion resonances;CONFIGURATIONS; NUCLEI SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2000 ;12(2-4):119-122 475 UI - 14761 AU - Cseh J AU - Levai G AU - Hess PO AU - Scheid W AD - Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryUniv Giessen, Inst Theoret Phys, D-35392 Giessen, GermanyNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCseh, J, Hungarian Acad Sci, Inst Nucl Res, PF 51, H-4001 Debrecen, Hungary TI - From common many-body problems to uncommon two-body problems: An algebraic approach to clusterization AB - The basic concepts and the geometric content of the semimicroscopic algebraic cluster model are presented. The model is applied for a unified description of the Ni-56 nucleus, including both the low-lying states and the molecular Si-28 + Si-28 resonances MH - Germany MH - Hungary MH - Mexico|Distrito Federal PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0177-7963 UR - ISI:000165723100005 L2 - SHELL-MODEL; NUCLEUS; STATES; RESONANCES; FISSION; SYSTEM SO - Few-Body Systems 2000 ;29(1-3):61-74 476 UI - 15011 AU - Cudney RS AU - Kaczmarek M AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22880, Baja California, MexicoUniv Exeter, Sch Phys, Exeter EX4 4QL, Devon, EnglandCudney, RS, Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Apdo Postal 2732, Ensenada 22880, Baja California, Mexico TI - Light-induced removal of 180 degrees ferroelectric domains in Rh : BaTiO3 AB - We show that optically-induced photorefractive space-charge fields can remove 180 degrees ferroelectric domains in rhodium-doped barium titanate. The cross section of the domains must be small (less than 100 microns) for this process to occur. (C) 2000 Optical Society of America MH - United Kingdom MH - Mexico|Baja California PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000090014200005 L2 - SPACE-CHARGE FIELDS; BATIO3 SO - Optics Express 2000 ;7(9):323-328 477 UI - 14792 AU - Cuesta L AU - Phillips JP AD - Inst Astrofis Canarias, Tenerife, SpainInst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoCuesta, L, Inst Astrofis Canarias, Tenerife, Spain TI - The density, extinction, temperature, and excitation structures of NGC 2440 AB - Rr,have observed the planetary nebula NGC 2440 in the transitions [O II] lambda 3727, He II lambda 4686, [O III] lambda lambda (4363 + 5007), H I lambda lambda (4861 + 6563), He I lambda 5876, [N II] lambda 6584, [S II] lambda lambda (6717 + 6731), and [S III] lambda 9061, as well as in various continuum filters. As a result, we are able to evaluate the excitation structure of the source and determine the projected variations in density, extinction, and temperature. Density is found to have a bilobal structure at the nucleus, where peak values approach 2 x 10(3) cm(-3), and thereafter decline to similar to 500 cm(-3) for distances similar to +/- 12 " from the central star. Densities for larger spatial offsets appear more uniform, although the maps reveal evidence for appreciable small-scale dumping. Electron temperatures appear to vary by no more than DeltaT(e)/T-e similar to 0.035 throughout much of the shell, although here again T-e rises by similar to 14% a little to the southeast of the nucleus, an enhancement which may also extend northwest and southeast along P.A. = 135 degrees. Finally, it is noted that, as in the case of extinction and density, the extinction is prone to small but quite rapid variations over the projected surface of the source by of order DeltaA(v) similar to +/- 0.1 mag. There appears to be evidence for a band of extinction with amplitude DeltaA(v) similar to 0.2 mag along the minor axis of the exterior bilobal flow and for a possible extinction deficit associated with the interior bilobal flow. We discuss possible scenarios for the formation of this multipolar nebula in the context of the present results MH - Mexico|Jalisco MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165599300021 L2 - ISM : jets and outflows;planetary nebulae : individual (NGC 2440);PLANETARY-NEBULA NGC-2440; POINT-SYMMETRICAL NEBULAE; NARROW-BAND IMAGES; RADIATIVE-TRANSFER; LINE-INTENSITIES; OPTICAL-SPECTRA; EMISSION-LINES; CENTRAL STARS; EPISODIC JET; PRECESSION SO - Astrophysical Journal 2000 ;543(2):754-763 478 UI - 14937 AU - Cuesta L AU - Phillips JP AD - Inst Astrofis Canarias, E-38200 La Laguna, SpainInst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoCuesta, L, Inst Astrofis Canarias, Calle Via Lactea, E-38200 La Laguna, Spain TI - Excitation and density mapping of NGC 3587 AB - We have acquired narrowband imaging of NGC 3587 (the Owl Nebula) in the transitions [O II] lambda lambda 3727, 3729, H I lambda 4861, [O III] lambda 5007, H I lambda 6563, [N II] lambda 6584, [S II] lambda 6717, and [S II] lambda 6731. As a result, we are able to evaluate the variation of excitation and electron density over the projected envelope of the source. We propose that the Owl Nebula consists of four primary shells: an internal, tilted, barrel-like component responsible for higher excitation emission; two much more uniform, spherically symmetric structures, CSCI and CSCII. These, finally, are enveloped by a much lower intensity, lower excitation halo, dubbed CSCIII. A large proportion of the low-excitation emission appears to be associated with the periphery of CSCI, and it is conceivable that this is, physically speaking, a relatively thin-shelled structure. [S II] density mapping appears to indicate that n(e) is preferentially enhanced toward the northern periphery of the shell, in a regime where low-excitation line strengths are also preferentially enhanced. We suggest that such trends may arise through northerly shocking of the shell CSCI. There is, in addition, some evidence for an east-west dichotomy in density structure, which may reflect variable sampling of the higher density, barrel-like component. Mean densities are low, and of the order = 590 cm(-3) MH - Mexico|Jalisco MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000165095200034 L2 - planetary nebulae : individual (NGC 3587);PLANETARY-NEBULAE; MODELS SO - Astronomical Journal 2000 ;120(5):2661-2669 479 UI - 16578 AU - Cueto-Manzano AM AU - Konel S AU - Freemont AJ AU - Adams JE AU - Mawer B AU - Gokal R AU - Hutchison AJ AD - Manchester Royal Infirm, Dept Renal Med, Manchester M13 9WL, Lancs, EnglandUniv Manchester, Sch Med, Dept Osteopathol, Manchester M13 9PT, Lancs, EnglandUniv Manchester, Sch Med, Dept Diagnost Radiol, Manchester M13 9PT, Lancs, EnglandUniv Manchester, Sch Med, Dept Med, Manchester M13 9PT, Lancs, EnglandCueto-Manzano, AM, Inst Nacl Nutr Salvador Zubiran, Depto Nefrol & M M, Vasco Quiroga 15,Deleg, Mexico City 14000, DF, Mexico TI - Effect of 1,25-dihydroxyvitamin D-3 and calcium carbonate on bone loss associated with long-term renal transplantation AB - To investigate the effect of calcitriol plus calcium carbonate on the bone loss associated with long-term renal transplantation, 30 patients with serum creatinine levels less than 2.0 mg/dL were randomly allocated to a control (n = 14) or treatment group (n = 16) and studied with bone biopsy and densitometry at baseline and after 1 year of follow-up. Calcitriol (0.25 mu g/d) plus calcium carbonate (500 mg/d of elemental calcium) were administered to patients in the treatment group, Comparing the baseline and final data of each group at a time, no change in bone mineral density (BMD) z score was observed at the distal radius (control, -0.8 +/- 0.8 versus -0.6 +/- 0.9; treatment, -1.0 +/- 1.0 versus -1.0 +/- 1.1). However, a significant increase (P < 0.05) was found at the lumbar spine in both groups (control, 0.1 +/- 1.6 versus 0.4 +/- 1.6; treatment, -0.1 +/- 1.5 versus 0.3 +/- 1.5) and only in the treatment group at the femoral neck (control, -0.9 +/- 1.0 versus -0.8 +/- 1.0; treatment, -0.5 +/- 0.9 versus -0.3 +/- 1.1). When BMD was compared between groups, no significant differences were observed at the evaluated anatomic sites at baseline or after 1 year of follow-up. After 1 year of follow-up, adjusting for age and sex (z score), the control group showed a trend to reduce the value of several histomorphometric parameters, including osteoblast surface (-2.2 +/- 6.1 versus -3.4 +/- 3.9), osteoid surface (-2.3 +/- 3.5 versus -3.1 +/- 3.9), and osteoclast surface (0.2 +/- 5.0 versus -1.3 +/- 3.3). Consequently, there was a significant reduction (P < 0.05) in mineralizing surface (-9.8 +/- 11.0 versus -15.8 +/- 12.3) and appositional rate (-5.8 +/- 2.7 versus -7.6 +/- 2.2). In the treatment group, a significant reduction (P < 0.05) in osteoclast surface was observed at the end of the study (3.9 +/- 6.8 versus -1.2 +/- 4.1), and although a trend to reduce osteoblast surface (-2.5 +/- 2.6 versus -3.2 +/- 5.7) and osteoid surface (-2.1 +/- 2.5 versus -3.2 +/- 2.8) was also found, patients maintained approximately the same level of wall thickness (-5.2 +/- 5.3 versus -5.3 +/- 3.3) and bone volume (-2.7 +/- 1.8 versus -2.5 +/- 1.7). However, there was no improvement in mineralizing surface (-4.2 +/- 2.9 versus -10.4 +/- 3.6) or appositional rate (-5.8 +/- 3.1 versus -8.1 +/- 2.6). No significant differences in bone histomorphometric variables were observed between groups after 1 year of follow-up. In conclusion, 1,25-dihydroxyvitamin D-3 and calcium carbonate did not significantly improve bone loss in long-term renal transplant recipients. However, significant osteoclast suppression and a trend to maintain trabecular bone volume and wall thickness as well as improve the axial BMD were observed in the treatment group. (C) 2000 by the National Kidney Foundation, Inc MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 27 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0272-6386 UR - ISI:000085093300009 L2 - 1,25-dihydroxyvitamin D-3;calcium carbonate;bone loss;bone densitometry;bone histomorphometry;renal transplantation;AMBULATORY PERITONEAL-DIALYSIS; MINERAL DENSITY; KIDNEY-TRANSPLANTATION; PARATHYROID-HORMONE; VITAMIN-D; RECIPIENTS; OSTEOPOROSIS; FAILURE; DISEASE; HISTOMORPHOMETRY SO - American Journal of Kidney Diseases 2000 ;35(2):227-236 480 UI - 15483 AU - Cueto J AU - Valencia-Reyes MS AU - Vazquez-Frias JA AU - Castaneda-Leeder P AU - Nevarez-Bernal R AU - Weber-Sanchez A AD - Hosp Angeles Las Lomas, Amer British Cowdray Hosp, Dept Surg, Mexico City 52787, DF, MexicoLouisiana State Univ, Med Ctr, New Orleans, LA, USACueto, J, Hosp Angeles Las Lomas, Amer British Cowdray Hosp, Dept Surg, Vialidad La Barranca S-N,Consultorio 105,Col Vall, Mexico City 52787, DF, Mexico TI - Technical modifications for laparoscopic appendectomy and other pelvic procedures using microinstruments AB - Reusable microinstruments are used in a modification of the three-port technique fur laparoscopic appendectomy and other pelvic procedures; the method is described herein. Fifty-seven consecutive patients were operated upon using this technique. There was no mortality; there were two minor complications and no conversions to laparotomy. Pain medication needs were minimal in all patients, and the cosmetic results were excellent. The use of microinstruments for pelvic laparoscopic procedures is safe and cost-effective using the technical modifications described MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Article AV - English IS - 1051-7200 UR - ISI:000088690300005 L2 - appendectomy;microinstruments;modifications;needlescopic surgery;RANDOMIZED CONTROLLED TRIALS; METAANALYSIS; SURGERY SO - Surgical Laparoscopy Endoscopy & Percutaneous Techniques 2000 ;10(4):211-214 481 UI - 14985 AU - cuna-Askar K AU - Englande AJ AU - Hu C AU - Jin G AD - Univ Autonoma Nuevo Leon, Fac Med, Dept Quim Analit, Monterrey, Nuevo Leon, MexicoTulane Univ, Med Ctr, Sch Publ Hlth & Trop Med, Dept Environm Hlth Sci, New Orleans, LA 70112, USAIllinois State Univ, Coll Appl Sci & Technol, Dept Hlth Sci, Normal, IL 61790, USAAcuna-Askar, K, Univ Autonoma Nuevo Leon, Fac Med, Dept Quim Analit, Apdo Postal 1563, Monterrey, Nuevo Leon, Mexico TI - Methyl tertiary-butyl ether (MTBE) biodegradation in batch and continuous upflow fixed biofilm reactors AB - MTBE was effectively biodegraded under oxidizing environmental conditions in the presence of an acclimated mixed culture isolated from a petrochemical biotreater. MC-1 (Gram-positive coccus), MC-2 (Acinetobacter Iwoffii) and MC-3 (Bacillus sp.) were present in the culture medium, with MC-1 being the predominant organism. The presence of other easily assimilated carbon sources in the culture medium influenced MTBE biodegradation. In batch studies, 62-73% MTBE was biodegraded in 144-192 hours at an initial concentration of 100 ppm as the sole carbon source, with the ORP ranging from 191-274 my, and at a temperature of 29 degreesC. The overall K rate constants and the specific k rate constants were evaluated using a first or der rate equation. Mean values determined were 1.79x10(-1) day(-1) and 1.66x10(-2) day(-1)/(mg/L cell mass), respectively. Continuous upflow fixed biofilm reactor studies were performed at retention times of 0.25, 0.5, and 1 day at an initial MTBE concentration of 150 ppm. Results indicated that approximately 53% MTBE was biodegraded for the 0.25 day retention time and 70% for both the 0.5 and 1.0 day retention times. Three kinetic models were evaluated for all experimental retention times. These included: Model I (Eckenfelder); Model II (Arvin) and Model III (first-order biphasic). Results indicated that model III yielded the highest and most consistent correlation coefficients for all retention times evaluated MH - Mexico|Nuevo Leon MH - USA PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400024 L2 - biodegradation;methyl tert-butyl ether;petrochemical activated sludge;kinetic rate constant;fixed film bioreactor;CARBON-TETRACHLORIDE BIODEGRADATION; HYDROCARBONS; GROUNDWATER SO - Water Science and Technology 2000 ;42(5-6):153-161 482 UI - 14026 AU - cuna-Soto R AU - Romero LC AU - Maguire JH AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoBoston Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02215, USAAcuna-Soto, R, Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Large epidemics of hemorrhagic fevers in Mexico 1545-1815 AB - In 1545, twenty-four years after the Spanish conquest of the Aztec empire, an epidemic of a malignant form of a hemorrhagic fever appeared in the highlands of Mexico. The illness was characterized by high fever, headache, and bleeding from the nose, ears, and mouth, accompanied by jaundice, severe abdominal and thoracic pain as well as acute neurological manifestations. The disease was highly lethal and lasted three to four days. It attacked primarily the native population, leaving the Spaniards almost unaffected. The hemorrhagic fevers remained in the area for three centuries and the etiologic agent is still unknown. In this report we describe, and now that more information is available, analyze four epidemics that occurred in Mexico during the colonial period with a focus on the epidemic of 1576 which killed 45% of the entire population of Mexico. It is important to retrieve such diseases and the epidemics they caused from their purely historical context and consider the reality that if they were to reemerge, they are potentially dangerous MH - Mexico|Distrito Federal MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000167937000015 SO - American Journal of Tropical Medicine and Hygiene 2000 ;62(6):733-739 483 UI - 16064 AU - cuna-Soto R AU - Maguire JH AU - Wirth DF AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USABrigham & Womens Hosp, Div Infect Dis, Boston, MA 02115, USAAcuna-Soto, R, Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico TI - Gender distribution in asymptomatic and invasive amebiasis AB - OBJECTIVE: The majority of individuals infected by the protozoan parasite Entamoeba histolytica experience subclinical infections. However, a small proportion of parasitized individuals develop severe invasive disease such as amebic dysentery or amebic liver abscess. Invasive amebiasis affects predominantly men the usual explanation for this has been that men have a higher rate of asymptomatic infections and therefore experience a higher rate of invasive disease. To date, there is no convincing evidence of an increased rate of asymptomatic infection of men as compared with women. The purpose of this study was to evaluate the evidence supporting the hypothesis that men have higher rates of asymptomatic infection and thus an increased frequency of invasive amebiasis. METHODS: We reviewed published reports of invasive amebiasis and population-based parasitological studies from 1929-1997 to compare the gender ratio of asymptomatic and symptomatic E. histolytica infection. Infections with E. histolytica were differentiated from the nonpathogenic E. dispar whenever possible. RESULTS: The reports of invasive amebiasis (dysentery, liver abscess, colonic perforation, peritonitis, appendicitis, and ameboma) showed a higher proportion of men than women (ratio, male:female = 3.2.1, p < 0.05). This contrasts with the epidemiological surveys, where the rate of asymptomatic infection with E. histolytica was the same (1:1) for both genders (p > 0.05). CONCLUSIONS: Asymptomatic E. histolytica infection is equally distributed between the genders. The high proportion of men with invasive amebiasis may be due to a male-related susceptibility to invasive disease. (C) 2000 by Am. Cell. of Gastroenterology MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 20 U4 - Gastroenterology & Hepatology U5 - J;Review AV - English IS - 0002-9270 UR - ISI:000086853300028 L2 - NONPATHOGENIC ENTAMOEBA-HISTOLYTICA; LIVER-ABSCESS; DIFFERENTIATION; DISPAR; INFECTION; EPIDEMIOLOGY; ZYMODEMES; CHILDREN SO - American Journal of Gastroenterology 2000 ;95(5):1277-1283 484 UI - 14960 AU - Curatti L AU - Porchia AC AU - Herrera-Estrella L AU - Salerno GL AD - FIBA, Ctr Invest Biol, RA-7600 Mar Del Plata, ArgentinaCINVESTAV, Unidad Irapuato, Dept Ingn Genet Plantas, Irapuato 36500, Gto, MexicoCuratti, L, FIBA, Ctr Invest Biol, CC 1348, RA-7600 Mar Del Plata, Argentina TI - A prokaryotic sucrose synthase gene (susA) isolated from a filamentous nitrogen-fixing cyanobacterium encodes a protein similar to those of plants AB - Sucrose synthase (SS), a key enzyme in plant carbohydrate metabolism, has recently been isolated fi om Anabaena sp. strain PCC 7119, and biochemically characterized; two forms (SS-I and SS-II) were detected (Porchia et al. 1999, Planta 210: 34-40). The present study describes the first isolation and characterization of a prokaryotic SS gene, susA, encoding SS-II from that strain of Anabaena. A 7 kbp DNA fragment containing: an open reading frame (EMBL accession number AJ010639) with about 30-40% amino acid identity with plant SSs was isolated fi om an Anabaena subgenomic library. The putative SS gene was demonstrated to encode an SS protein by expression in Escherichia coli. The biochemical properties of the recombinant enzyme were identical to those of the enzyme purified from the cyanobacterial cells. The deduced amino acid sequence of the Anabaena SS diverged from every plant SS reported. The occurrence of SS in cyanobacteria of different taxonomic groups was investigated. The enzyme occurs in several filamentous nitrogen-fixing cyanobacteria but not in two species of unicellular, non-diazotrophic cyanobacteria MH - Argentina MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0935 UR - ISI:000090117600016 L2 - Anabaena sp (sucrose metabolism);cyanobacterium;sucrose metabolism;sucrose synthase;PHOSPHATE SYNTHASE; ANABAENA; BIOSYNTHESIS; ENZYMES; PURIFICATION; METABOLISM; CELLULOSE; CALLOSE SO - Planta 2000 ;211(5):729-735 485 UI - 15601 AU - D'agrosa C AU - Lennert-Cody CE AU - Vidal O AD - Inst Tecnol & Estudios Super Monterrey, Guaymas 85400, Sonora, MexicoInteramer Trop Tuna Commiss, La Jolla, CA 92037, USAD'agrosa, C, Duke Univ, Marine Lab, Natl Marine Fisheries Serv, SE Fisheries Sci Ctr, Beaufort, NC 28516 USA TI - Vaquita bycatch in Mexico's artisanal gillnet fisheries: Driving a small population to extinction AB - The world's most endangered marine cetacean, the vaquita (Phocoena sinus), continues to be caught in small-mesh gillnet fisheries throughout much of its range. We monitored fishing effort and incidental vaquita mortality in the upper Gulf of California, Mexico, from January 1993 to January 1995 to study the magnitude and causes of the incidental take. Of those factors studied, including net mesh size, soaktime, and geographic area, none contributed significantly to the incidental mortality rate of the vaquita, implying that the principal cause of mortality is fishing with gillnets per se. The total estimated incidental mortality caused by the fleet of El Golfo de Santa Clara was 39 vaquitas per year (95% CI = 14, 93), over 17% of the most recent estimate of population size. El Golfo de Santa Clara is one of three main ports that support gillnet fisheries throughout the range of the vaquita. Preliminary results indicate that fishing effort for San Felipe, Baja California, is comparable to that of El Golfo de Santa Clara, suggesting that this estimate of incidental mortality of vaquitas represents a minimum. We strongly recommend a complete and permanent ban on gillnets in the area. Alternative or supplemental mitigation strategies include (1) a maximum annual allowable mortality limit of vaquitas; (2) mandatory observer coverage of all boats fishing within the Upper Gulf of California and Colorado River Delta Biosphere Reserve; (3) extension of the Upper Gulf of California and Colorado River Delta Biosphere Reserve to encompass all known vaquita habitat; (4) rigorous enforcement of new and existing regulations; and (5) development of alternative sources of income for gillnet fishers MH - Mexico|Sonora MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 16 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000088442400021 L2 - HARBOR PORPOISE; PHOCOENA-SINUS; CONSERVATION; MORTALITY; FISH SO - Conservation Biology 2000 ;14(4):1110-1119 486 UI - 14636 AU - Daessle LW AU - Carriquiry JD AU - Navarro R AU - Villaescusa-Celaya JA AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoDaessle, LW, PMB 133,189003-E, Coronado, CA 92178, USA TI - Geochemistry of surficial sediments from Sebastian Vizcaino Bay, Baja California AB - Thirty-seven surficial sediment samples from Vizcaino Bay, Baja California, are analysed for their phosphate, organic matter, carbonate, as well as metal contents (Al, Fe, Mn, Zn, Cu, Ni, Cr, Cd and Sr). Highest organic carbon concentrations (up to 15.1%) are found in deeper waters of the outer bay and also in a narrow area extending NW-SE adjacent to the eastern coast. Total carbonates are also enriched proximal to the eastern coast, with the highest concentrations found on Ranger Bank (36.9%), where it is associated with foraminifer-rich sands. Phosphate (P2O5) content is highest (22.3%; mainly present as francolite pellets, nodules and bone fragments) in shallow waters (2970 meters) adjacent to Punta Santa Rosaliita to the NE of the bay, showing a sharp offshore decrease. Geochemical partition analyses indicate that, except for Sr and Cd, all the metals studied occur mainly in the detrital fraction of the sediment, with minor but varying proportions occurring in the more reactive fractions. The regional distribution of non-lithogenic Cu, Cr, Ni, Cd and, to a lesser extent Zn, is mainly controlled by their association with organic matter. These elements show high concentrations in an area under influence of upwelled waters, and in the organic-rich bathymetric deep in the outer bay. Cadmium is mainly associated with the most reactive fraction of the sediments (either loosely adsorbed, as carbonates and/or Fe-Mn oxihydroxides), being enriched (4.09 ppm) directly below the coastal upwelling region. Different precipitation processes for Cd compared to Cu, Cr and Ni occur in the area, possibly due to the preferential input of Cd via upwelling and/or the relatively shorter residence time of Cd in waters above continental margins. The distribution of Sr is related to that of calcium carbonate, except for an area proximal to the coastal lagoons on the SE coast, where relatively high Sr concentrations are found (< 1725 ppm). Various metal enriched samples throughout the study area, suggest different lithologies and sources of the detrital components deposited. Of these, detrital Mn is associated with sediments derived from the peninsular mainland NE of the bay and Fe, Cu, Cr, Ni and Zn with the lithogenic detritus on Ranger Bank MH - Mexico|Baja California MH - USA PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000165935500016 L2 - marine sediments;geochemistry;upwelling;organic carbon;metals;phosphorite;ELEMENT GEOCHEMISTRY; PARTICULATE MATTER; TRACE-METALS; MEXICO; OCEAN; CADMIUM SO - Journal of Coastal Research 2000 ;16(4):1133-1145 487 UI - 16356 AU - Daessle LW AU - Cronan DS AU - Marchig V AU - Wiedicke M AD - Univ London Imperial Coll Sci Technol & Med, TH Huxley Sch Environm Earth Sci & Engn, London SW7 2BP, EnglandBundesanstalt Geowissensch & Rohstoffe, D-30655 Hannover, GermanyDaessle, LW, Univ Autonoma Baja California, Inst Invest Oceanol, Apdo 453, Ensenada 22800, Baja California, Mexico TI - Hydrothermal sedimentation adjacent to the propagating Valu Fa Ridge, Lau Basin, SW Pacific AB - The partition geochemistry, and hydrothermal metal accumulation rates (AR) during the Late Quaternary(< 120 ka), have been investigated in eight cores adjacent to the Valu Fa Ridge (VFR) in the southern Lau Basin. The sediments consist mainly of foraminiferal nannofossiliferous ooze with ash and abundant amorphous Fe and Mn oxyhydroxides. Plume fall-out from active hydrothermal vents was collected in the immediate vicinity of hydrothermal outlets. It contains barite, sphalerite and feldspar. Solutions adjacent to known outlets exhibit a significant enrichment in Mn, ill, Ph, Ag, Co, and Zn; these elements may find their way into the sediments by precipitation and/or adsorption. Sea water at greater distances (> 3 km) from hydrothermally active areas still shows an enrichment of Mn, Ag, Ba and Zn when compared to regional (500 m depth) Lau Basin sea water. The elements, Ni, Zn, Cu, Co and Mo, are associated with Mn oxides in the sediment and are thought to have been scavenged by hydrothermal oxides during the transport of hydrothermal oxides away from the spreading center. Only a low proportion of Fe is bound to the hydrothermal oxide phase in the sediments and this element is mainly associated with silicate phases. Principal components analysis (PCA) of geochemical data in the detrital-free, CaCO3-free fraction of the sediments supports a geochemical "hydrothermal oxide" association between Mn, Ni, Mo, Cu, Zn, Pb, P, Be, Ba and La, with Fe associated with the silicate/weathered detrital fraction. Iron/manganese ratios in the oxide phase, range between 1.2 and 2.8. These values are below those found in sediments at mid-ocean ridges. Peaks in the downcore distribution in Mn appear to be contemporaneous in the cores studied and are probably the result of hydrothermal discharges on the VFR. Hemipelagic sedimentation rates throughout the area average 2.3 cm ka(-1). Hydrothermal Mn AR range between 3 and 82 mg cm(-2) ka(-1) during the 0-30 ka B.P. period, and between 5 and 65 mg cm(-2) ka(-1) during the 30-120 ka B.P. period. Maximum Mn AR adjacent to the VFR are comparable to the highest values previously reported for Recent sediments proximal to the East Pacific Rise (EPR). During the entire period (0-120 ka B.P.), Mn AR are highest in core SO48/101 located about 90 km behind the propagating tip of the VFR. Recent hydrothermal input has also occulted about 33 km behind the propagator. This is in accord with the suggested location of fully evolved 'steady state' magma chambers occurring some distance (tens of kilometers) behind propagating rift tips. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0025-3227 UR - ISI:000085933900015 L2 - Lau Basin;hydrothermal sediments;Late Quaternary;geochemistry;sea water;BACK-ARC BASIN; MID-ATLANTIC RIDGE; ACCUMULATION RATES; METALLIFEROUS SEDIMENTS; PELAGIC SEDIMENTS; SOUTHWEST PACIFIC; GEOCHEMISTRY; METALLOGENESIS; 26-DEGREES-N; PARTICLES SO - Marine Geology 2000 ;162(2-4):479-500 488 UI - 15695 AU - Daniels N AU - Bryant J AU - Castano RA AU - Dantes OG AU - Khan KS AU - Pannarunothai S AD - Tufts Univ, Dept Philosophy, Medford, MA 02468, USACouncil Int Org Med Sci, Geneva, SwitzerlandAga Khan Univ, Karachi, PakistanMinist Hlth, Bogota, ColombiaNatl Inst Publ Hlth, Ctr Hlth Syst Res, Cuernavaca, Morelos, MexicoNaresuan Univ, Fac Med, Ctr Hlth Equ Monitoring, Phitanulok, ThailandDaniels, N, Tufts Univ, Dept Philosophy, Medford, MA 02468, USA TI - Benchmarks of fairness for health care reform: a policy tool for developing countries AB - Teams of collaborators from Colombia, Mexico, Pakistan, and Thailand have adapted a policy tool originally developed for evaluating health insurance reforms in the United States into "benchmarks of fairness" for assessing health system reform in developing countries. We describe briefly the history of the benchmark approach, the tool itself, and the uses to which it may be put. Fairness is a wide term that includes exposure to risk factors, access to all forms of care, and to financing. It also includes efficiency of management and resource allocation, accountability, and patient and provider autonomy. The benchmarks standardize the criteria for fairness. Reforms are then evaluated by scoring according to the degree to which they improve the situation, i.e, on a scale of -5 to 5, with zero representing the status quo. The object is to promote discussion about fairness across the disciplinary divisions that keep policy analysts and the public from understanding how trade-offs between different effects of reforms can affect the overall fairness of the reform. The benchmarks can be used at both national and provincial or district levels, and we describe plans for such uses in the collaborating sites. A striking feature of the adaptation process is that there was wide agreement on this ethical framework among the collaborating sites despite their large historical, political and cultural differences MH - Colombia MH - Mexico|Morelos MH - Pakistan MH - Switzerland MH - Thailand MH - USA PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 20 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000088109500005 L2 - health care reform;health services accessibility;benchmarking, standards;health policy;developing countries;United States;EQUITY SO - Bulletin of the World Health Organization 2000 ;78(6):740-750 489 UI - 14834 AU - Das G AU - Gould DS AU - Augustine MM AU - Fragoso G AU - Scitto E AU - Stroynowski I AU - Van Kaer L AU - Schust DJ AU - Ploegh H AU - Janeway CA AD - Yale Univ, Sch Med, Immunobiol Sect, New Haven, CT 06520, USAHoward Hughes Med Inst, New Haven, CT 06520, USAHarvard Univ, Sch Med, Dept Pathol, Boston, MA 02115, USAVanderbilt Univ, Sch Med, Dept Microbiol & Immunol, Nashville, TN 37232, USAVanderbilt Univ, Sch Med, Howard Hughes Med Inst, Nashville, TN 37232, USAUniv Texas, SW Med Ctr, Ctr Immunol, Dallas, TX 75235, USAUniv Texas, SW Med Ctr, Dept Microbiol, Dallas, TX 75235, USAUniv Texas, SW Med Ctr, Dept Internal Med, Dallas, TX 75235, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoJaneway, CA, Yale Univ, Sch Med, Immunobiol Sect, POB 208011,LH416,310 Cedar St, New Haven, CT 06520 USA TI - Qa-2-dependent selection of CD8 alpha/alpha T cell receptor alpha/beta(+) cells in murine intestinal intraepithelial lymphocytes AB - Murine intestinal intraepithelial lymphocytes (iIELs) are made up of a heterogeneous mix of T cells with unique phenotypes. Whereas CD8(+) T cells in peripheral lymphoid organs use CD8 alpha/beta and are selected on MHC class Ia molecules, a majority of iIELs use CD8 alpha/alpha. Here, we report that the presence of CD8 alpha/alpha TCR-alpha/beta cells in iIELs is independent of classical MHC class I molecules K-b and D-b, as illustrated by their presence in K-b/D-b double-knockout mice and in mice lacking a nonclassical MHC class I molecule, CD1d. Most strikingly, their presence is decreased by similar to 70% in mice lacking transporter associated with antigen processing (TAP). The TAP-dependent nonclassical MHC class I molecule Qa-2 is strongly implicated in the presence of these cells, as inferred from the low numbers of CD8 alpha/alpha TCR-alpha/beta T cells in mice deficient in Qa-2 genes. Second, a Qa-2-transgenic mouse made in a Qa-2(-) strain showed an increase in the numbers of CD8 alpha/alpha cells among its iIELs. Thus, the presence of CD8 alpha/alpha TCR-alpha/beta cells in iIELs is mainly dependent on the nonclassical MHC class I molecule Qa-2 MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 33 U4 - Immunology;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0022-1007 UR - ISI:000165433000014 L2 - CD8 alpha/alpha TCR-alpha/beta cells;MHC class I-deficient mice;Qa-2-transgenic mice;Qa-2-deficient mice;intestinal intraepithelial lymphocyte;MAJOR HISTOCOMPATIBILITY COMPLEX; CLASS-I MOLECULES; DEFICIENT MICE; GAMMA-DELTA; TOXOPLASMA-GONDII; MUTANT MICE; IFN-GAMMA; EPITHELIUM; MOUSE; EXPRESSION SO - Journal of Experimental Medicine 2000 ;192(10):1521-1527 490 UI - 14215 AU - Dascalu T AU - costa-Ortiz SE AU - Ortiz-Morales M AU - Compean I AD - Ctr Invest Opt, Aguascalientes, MexicoNatl Inst Laser Plasma & Radiat Phys, Bucharest, RomaniaDascalu, T, Res Opt Ctr, Leon, Mexico TI - Removal of the indigo color by laser beam-denim interaction AB - Our experiments show that the laser fading process removes efficiently indigo-dye from denim support. We use the beams from Nd:YAG laser (1064nm and its second harmonic 532nm) and CO2 (10.6 mum) lasers. Different laser pulse parameters were used in order to obtain laser power density and fluency to start the ablation process. The purpose of this work is to determine the change of denim diffuse reflectivity spectra after laser irradiation with different wavelength and different power density. The change of diffuse reflectivity coefficient was up to 17% at 450nm wavelength (from 8% reflectivity for unirradiated denim). (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Aguascalientes MH - Mexico|Guanajuato MH - Romania PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0143-8166 UR - ISI:000167152800005 L2 - ablation;Nd : YAG laser;CO2 laser;indigo-dyed denim SO - Optics and Lasers in Engineering 2000 ;34(3):179-189 491 UI - 15142 AU - Davalos IP AU - Olivares N AU - Castillo MT AU - Cantu JM AU - Ibarra B AU - Sandoval L AU - Moran MC AU - Gallegos MP AU - Chakraborty R AU - Rivas F AD - IMSS, CIBO, Div Genet & Med Mol, Guadalajara 44340, Jalisco, MexicoUdeG, CUCS, Doctorado Genet Humana, Guadalajara, Jalisco, MexicoUniv Texas, Ctr Human Genet, Houston, TX, USARivas, F, IMSS, CIBO, Div Genet & Med Mol, Sierra Mojada 800, Guadalajara 44340, Jalisco, Mexico TI - The C677T polymorphism of the methylenetetrahydrofolate reductase gene in Mexican mestizo neural-tube defect parents, control mestizo and native populations AB - The C677T mutation of the methylenetetrahydrofolate reductase (MTHFR) gene, associated with the thermolabile form of the enzyme, has reportedly been found to be increased in neural-tube defects (NTD), though this association is still unclear. A group of 107 mestizo parents of NTD children and five control populations: 101 mestizo (M), 50 Huichol (H), 38 Tarahumara (T), 21 Purepecha (P) and 20 Caucasian (C) individuals were typed for the MTHFR C677T variant by the PCR/RFLP (Hinf1) method. Genotype frequencies were in agreement with the Hardy-Weinberg expectations in all six populations. Allele frequency (%) of the C677T variant was 45 in NTD, 44 in M, 56 in H, 36 in T, 57 in P, 35 in C. Pairwise inter-population comparisons of allele frequency disclosed a very similar distribution between NTD and M groups (exact test, P = 0.92). Among controls, differences between M and individual native groups were NS (0.06 < P < 0.21), as it was between M and C (P = 0.29). A high frequency of the variant was found in H (56 %) and P (57 %). A similar allele frequency in groups M and NTD does not support a causal relationship between NTD and parental MTHFR C677T genotypes. Thus, the C677T valiant cannot be regarded as a major genetic risk factor for NTD in Mexican mestizo parents. Otherwise, C677T in Mexico is very frequent, especially in Huichol and Purepecha natives, as compared with other groups world wide. (C) 2000 Editions scientifiques et medicales Elsevier SAS MH - Mexico|Jalisco MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 13 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0003-3995 UR - ISI:000089602300005 L2 - neural tube defects;MTHFR;C677T mutation;PERICONCEPTIONAL VITAMIN SUPPLEMENTATION; RISK FACTOR; SPINA-BIFIDA; THERMOLABILE VARIANT; COMMON MUTATION; DISEASE; HYPERHOMOCYSTEINEMIA; PREVENTION; MTHFR SO - Annales de Genetique 2000 ;43(2):89-92 492 UI - 14759 AU - Davies FT AU - Olalde-Portugal V AU - Alvarado MJ AU - Escamilla HM AU - Ferrera-Cerrato RC AU - Espinosa JI AD - Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843, USACINVESTAV, Inst Plant Biol, Dept Biochem & Biotechnol, Irapuato, MexicoInst Tecnol Monterrey, ITESM, Queretaro, MexicoColegio Postgraduados, Montecillo, MexicoDavies, FT, Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843, USA TI - Alleviating phosphorus stress of Chile ancho pepper (Capsicum annuum L. 'San Luis') by arbuscular mycorrhizal inoculation AB - Chile ancho pepper (Capsicum annuum L. 'San Luis') is a primary source of vitamin C in the Mexican diet. It is important to select indigenous mycorrhizal fungi from Mexico that will utilize nutrients and water more efficiently in the production of this commercially valuable, native crop. In a greenhouse study, Chile ancho pepper plants were either non-inoculated (NonAMF), or inoculated with arbuscular mycorrhiza (AMF): Glomus fasciculatum, or a mixed species inoculum from Mexico (ZAC-19) containing Glomus albidum, Glomus claroides and Glomus diaphanum. Under reduced phosphorus (P) conditions, AMF enhanced plant vegetative and reproductive growth. Growth of AMF plants at low P was comparable with NonAMF plants at moderate P. At low P, only plants inoculated with ZAC-19 had greater leaf tissue P than NonAMF plants, while both groups of inoculated plants had greater leaf tissue P at moderate P fertility. AMF plants generally had greater Fe, Mn, Zn and Cn, but lower N and K (ZAC-19) than NonAMF chile ancho plants. Formation of extraradical hyphae was greatest in ZAC-19 at low P, and was reduced at higher P levels. This corresponded with a 2.9 fold reduction in spores recoverable in soil by ZAC-19 at high P; however spore production and development of extraradical hyphae by Glomus fasciculatum was not affected by P fertility. At low P, C. fasciculatum had greater arbuscule and vesicle formation than ZAC-19. While both AMF isolates enhanced vegetative and reproductive growth of chile ancho under reduced P conditions, G. fasciculatum was generally more effective than ZAG-19 MH - Mexico|Guanajuato MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - USA PB - ASHFORD: HEADLEY BROTHERS LTD RP - NOT IN FILE U3 - TC 5 U4 - Horticulture U5 - J;Article AV - English IS - 0022-1589 UR - ISI:000165668800007 L2 - GAS-EXCHANGE; PLANT-GROWTH; DROUGHT RESISTANCE; COLONIZATION; GLOMUS; HYPHAE; INFECTION; SOYBEANS; FUNGUS SO - Journal of Horticultural Science & Biotechnology 2000 ;75(6):655-661 493 UI - 15257 AU - Davila A AU - Servin M AU - Facchini M AD - Ctr Invest Opt, Leon 37150, Gto, MexicoEcole Polytech Fed Lausanne, Inst Mesure & Anal Contraintes, IMAC GC Ecublens, CH-1015 Lausanne, SwitzerlandDavila, A, Ctr Invest Opt, Loma Bosque 115,Col Lomas Campestre, Leon 37150, Gto, Mexico TI - Fast phase-map recovery from large shears in an electronic speckle-shearing pattern interferometer using a Fourier least-squares estimation AB - Electronic speckle-shearing pattern interferometry offers the possibility of analyzing out-of-plane and in-plane deformations in experimental mechanics. However, to obtain high-contrast fringes this technique must introduce large shears into the speckle patterns. Several techniques have recently been proposed to recover the phase from these data, but they all suffer limitations due to the slow convergence of the proposed algorithms or to the low precision of the recovered phase. This paper presents a least-squares estimation method in the frequency domain that allows wavefront recovery from two orthogonal shearing fringe patterns when a large shear is applied. This method is based on the application of a single Fourier filter using the fast Fourier transform process. The experimental results obtained by using electronic speckle-shearing pattern interferometry for the analysis of a finite circular plate deformed at the center illustrate the advantages of the proposed technique. (C) 2000 society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)00309-3] MH - Mexico|Guanajuato MH - Switzerland PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000089213800024 L2 - shearing;speckle;interferometry;INTERFEROGRAMS; RECONSTRUCTION; SHEAROGRAPHY SO - Optical Engineering 2000 ;39(9):2487-2494 494 UI - 14769 AU - Day OJ AU - Gonzalez HGP AD - Conwy Lab, Ctr Environm Fisheries & Aquaculture Sci, Conwy, WalesCIAD, Mazatlan, Sinaloa, MexicoDay, OJ, Conwy Lab, Ctr Environm Fisheries & Aquaculture Sci, Conwy, Wales TI - Soybean protein concentrate as a protein source for turbot Scophthalmus maximus L AB - In the first of two experiments, the effect of a gradual substitution of dietary fish meal with soybean protein concentrate (SPC) on growth, feed consumption and protein digestibility was examined in 13 g turbot Scophthalmus maximus. Five isonitrogenous and isoenergetic diets (50% protein and 22 kJ g(-1)) containing SPC at protein replacement levels of 0, 25, 50, 75 and 100% were offered by hand twice daily. Growth rates of fish fed diets with zero and 25% replacement were not significantly different, with SGRs of 2.47 and 2.28, respectively. At higher replacement levels, growth rates decreased significantly with SGRs of 2.00, 1.33 and 0.68, respectively. Feed conversion ratios increased with soya replacement, with values of 0.68, 0.75, 0.89, 1.27 and 2.32, respectively, although there was no significant difference between the first two. Feed consumption rates remained constant up to 50% replacement, above which they decreased significantly, possibly because of reduced diet palatability. Apparent protein digestibility (APD) was not affected by the incorporation of SPC and ranged from 82.8 to 87.5%. Results suggest that protein catabolism increases in SPC-rich diets, possibly because of rapid assimilation and utilization of the methionine supplement. In the second experiment, the importance of amino acid supplements and the beneficial effects of protecting these, either by coating them in protein or incorporating them in a protein-lipid emulsion, was investigated. Growth data provided some indication that the utilization of SPC may be improved by incorporating the methionine and lysine supplement in a protein-lipid emulsion prior to diet preparation, although this finding was not found to be statistically significant (0.1 < P < 0.2) MH - Mexico|Sinaloa MH - United Kingdom PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Fisheries U5 - J;Article AV - English IS - 1353-5773 UR - ISI:000165700800003 L2 - alternative protein;protein metabolism;soya;turbot;RAINBOW-TROUT; FISH-MEAL; ONCORHYNCHUS-MYKISS; FEEDING STIMULANTS; ATLANTIC SALMON; DIETS; REPLACEMENT; NUTRITION; GROWTH; SALAR SO - Aquaculture Nutrition 2000 ;6(4):221-228 495 UI - 16575 AU - Dayal A AU - Sahai R AU - Watson AM AU - Trauger JT AU - Burrows CJ AU - Stapelfeldt KR AU - Gallagher JS AD - CALTECH, IPAC, JPL, Pasadena, CA 91125, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58090, Michoacan, MexicoSpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Wisconsin, Dept Astron, Madison, WI 53706, USADayal, A, CALTECH, IPAC, JPL, Mail Stop 100-22, Pasadena, CA 91125, USA TI - The etched hourglass nebula MyCn 18. II. A spatio-kinematic model AB - We have observed MyCn18, a young planetary nebula, with Hubble Space Telescope/Wide Field Planetary Camera 2 and have presented the observational results in an earlier paper. Here we present a detailed spatio-kinematic model of H alpha emission from the nebula. We model the hourglass-shaped nebular lobes as thin-walled structures in the shape of modified paraboloids. Variations in the H alpha. surface brightness with radius imply abrupt changes in the exponent of the power-law gas density in the hourglass walls. These density variations might reflect temporal variations in the mass-loss rate of the progenitor asympotic giant branch (AGE) star. Alternatively, they may be a result of the complex interaction between the fast and slow winds. From the H alpha surface brightness variations we infer that the nebula is density-bounded everywhere, except in the vicinity of the dense waist. We derive a total mass of 0.013 M . for the walls of the ionized nebula and an upper limit of 0.006 M . for the mass in the interior. This appears to be a small fraction of the total mass ejected in the AGE phase. The nebular kinematics are well modeled with a radial velocity field where velocity increases with latitude. The density and velocity structures derived from our model are consistent with general predictions of the interacting winds hypothesis for planetary nebula formation MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000085109700028 L2 - circumstellar matter;planetary nebulae : individual (MyCn 18);stars : AGB and post-AGB;stars : mass loss;PLANETARY-NEBULAE; RADIATION GASDYNAMICS; MOLECULAR-HYDROGEN; BIPOLAR NEBULAE; STARS; EVOLUTION; ENVELOPES; CO; EMISSION; WIND SO - Astronomical Journal 2000 ;119(1):315-322 496 UI - 15413 AU - de Anda GFV AU - Gommers D AU - Verbrugge SJC AU - De Jaegere A AU - Lachmann B AD - Erasmus Univ, Dept Anesthesiol, NL-3000 DR Rotterdam, NetherlandsInst Mexicano Seguro Social, Ctr Med Nacl Siglo 21, Hosp Especialidades Dr bernardo Sepulveda G, Unidad Ciudados Intens, Mexico City 06725, DF, MexicoLachmann, B, Erasmus Univ, Dept Anesthesiol, Room Ee 2393,POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Mechanical ventilation with high positive end-expiratory pressure and small driving pressure amplitude is as effective as high-frequency oscillatory ventilation to preserve the function of exogenous surfactant in lung-lavaged rats AB - Objective: To demonstrate that under well-defined conditions, pressure-controlled ventilators (PCV) allow settings that are as good as high-frequency oscillatory ventilators (HFOV) at preserving the function of exogenous surfactant in lung-lavaged rats. Design: Experimental, comparative study. Setting: Research laboratory of a large university. Subjects: Sixteen adult male Sprague-Dawley rats (280-310 g). Interventions: Lung injury was induced by repeated lavage. After last lavage, all animals received exogenous surfactant and were then randomly assigned to two groups (n = 8 per group). The first group received PCV with small pressure amplitudes and high positive end-expiratory pressure. The second group received HFOV. In both groups, an opening maneuver was performed by increasing airway pressure to improve PaO2/FIO2 to greater than or equal to 500 torr. Measurements and Main Results: Blood gases were measured every 30 mins for 3 hrs. Airway pressures were measured with a tip catheter pressure transducer. At the end of the study period, a pressure-volume curve was recorded and a broncho-alveolar lavage was performed to determine protein content and surfactant composition. The results showed that arterial oxygenation in both groups could be kept >500 torr during the 3-hr study period by using a mean airway pressure of 13 +/- 3 cm H2O in PCV and 13 +/- 2 cm H2O in HFOV. Further, there were no differences in the Gruenwald index, protein influx, or ratio of small to large aggregates between the study groups. Conclusion: PCV with sufficient level of positive end-expiratory pressure and small driving pressure amplitudes is as effective as HFOV to maintain optimal gas exchange, to improve lung mechanics, and to prevent protein influx and conversion of large into small aggregates after exogenous surfactant therapy in lung-lavaged rats MH - Mexico|Distrito Federal MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 13 U4 - Critical Care Medicine U5 - J;Article AV - English IS - 0090-3493 UR - ISI:000088867300037 L2 - respiratory distress syndrome;pulmonary surfactant;pressure controlled ventilation;high-frequency oscillatory ventilation;recruitment procedure;respiratory mechanics;rats;RESPIRATORY-DISTRESS SYNDROME; THERAPY; RABBITS; INJURY; MODEL SO - Critical Care Medicine 2000 ;28(8):2921-2925 497 UI - 15758 AU - de Anda J AU - Shear H AU - Maniak U AU - Riedel G AD - Environm Canada, Ontario Reg, Toronto, ON M3H 5T4, CanadaCtr Invest & Asistencia Tecnol & Diseno Estado Ja, Guadalajara 44270, Jalisco, MexicoTech Univ Braunschweig, Leichtweiss Inst Wasserbau, Abt Hydrol & Wasserwirtschaft, D-38106 Braunschweig, GermanyShear, H, Environm Canada, Ontario Reg, 4905 Dufferin St, Toronto, ON M3H 5T4, Canada TI - Phosphorus balance in Lake Chapala (Mexico) AB - Lake Chapala is the largest and most important lake in Mexico and the third largest lake in Latin America. It is the main water supply for Guadalajara, whose population is close to 5 million inhabitants. The primary tributary to the lake is the Lerma River. Large quantities of domestic and industrial sewage and agricultural runoff from the entire Lerma-Chapala basin still flow largely untreated into the lake. Starting in the 1970s, the lake has undergone significant changes in hydrology, resulting in an increase in the hydraulic residence time of the Lerma River (inlet waters) from a value of less than 10 years to one of more than 40 years. There are no previous studies establishing the total phosphorus balance in the lake. The focus of this work is to determine an historical phosphorus balance in Lake Chapala by quantifying the main pint and non-point sources of total P to the lake. Using water quality data recorded over a 24 year period (1974 to 1997), the mass balance shows an average total phosphorus accumulation rate in the lake of about 11 to 683 metric tons/year. The total P input to the lake is about 626 to 910 metric tons/year, of which the Lerma River contributes more than 90%. In the period of study, Lake Chapala has maintained a consistent eutrophic status, with an average annual external P load of 0.67 +/- 0.49 g/m(2). The results for three different periods show a trend to increasing yearly P loads per square meter of surface water MH - Canada MH - Germany MH - Mexico|Jalisco PB - ANN ARBOR: INT ASSOC GREAT LAKES RES RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Limnology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0380-1330 UR - ISI:000087817600001 L2 - Lake Chapala;phosphorus balance;eutrophication;hydrologic balance;Lerma-Chapala-Santiago basin SO - Journal of Great Lakes Research 2000 ;26(2):129-140 498 UI - 16460 AU - de Heluani CS AU - Catalan CAN AU - Hernandez LR AU - Burgueno-Tapia E AU - Joseph-Nathan P AD - Univ Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoJoseph-Nathan, P, Univ Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, Ayacucho 491, RA-4000 San Miguel De Tucuman, Tucuman, Argentina TI - Three new diterpenoids based on the novel sarcopetalane skeleton from Croton sarcopetalus AB - The roots of Croton sarcopetalus afforded three new diterpenoids (2-4) with a novel carbon skeleton that seems to be derived biosynthetically from a pimarane precursor. The essential oil of the roots gave trans-methylisoeugenol as the main constituent, along with 22 further compounds MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000085505900013 SO - Journal of Natural Products 2000 ;63(2):222-225 499 UI - 14383 AU - de Jong BHJ AU - Ochoa-Gaona S AU - Castillo-Santiago MA AU - Ramirez-Marcial N AU - Cairns MA AD - ECOSUR, Dept Agroecol, San Cristobal Casas 29200, Chiapas, MexicoECOSUR, Dept Biodivers Conservat, San Cristobal Casas 29290, Chiapas, MexicoUS EPA, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, Corvallis, OR 97333, USADe Jong, BHJ, ECOSUR, Dept Agroecol, Apartado Postal 63, San Cristobal Casas 29200, Chiapas, Mexico TI - Carbon flux and patterns of land-use/land-cover change in the Selva Lacandona, Mexico AB - Based on land-use/land-cover (LU/LC) maps for the 1970s and satellite imagery for the 1990s we estimate LU/LC change and associated C fluxes in 3 subregions of the Selva Lacandona, Chiapas, Mexico. The total area of closed forest was reduced by 31%, whereas secondary forests expanded more than ninefold, secondary shrubs by almost sixfold, and cultivated land and pasture areas expanded 21% and 92%, respectively. However, the LU/ LC change was not uniformly distributed over the entire study area. Total mean C densities ranged from 452 Mg C ha(-1) for closed mature forests to a low of 120 Mg C ha(-1) for pasture. The heavily converted areas lost an estimated 24% of their total 1976 C poets, whereas the low impacted region lost only 3% MH - Mexico|Chiapas MH - USA PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0044-7447 UR - ISI:000166866100007 L2 - SOUTHEAST-ASIA; FORESTS; DEFORESTATION; ECOSYSTEMS; CHIAPAS; POOLS SO - Ambio 2000 ;29(8):504-511 500 UI - 16050 AU - de Jong BHJ AU - Tipper R AU - Montoya-Gomez G AD - Univ Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JU, Midlothian, ScotlandColegio Frontera Sur, Div Sistemas Prod Alternativa, San Cristobal Casas 29290, Chiapas, MexicoDe Jong, BHJ, Univ Edinburgh, Inst Ecol & Resource Management, Darwin Bldg,Mayfield Rd, Edinburgh EH9 3JU, Midlothian, Scotland TI - An economic analysis of the potential for carbon sequestration by forests: evidence from southern Mexico AB - Forestry has been proposed as a means to reduce net greenhouse gas emissions, by either reducing sources or enhancing sinks. This study assesses the potential of an incentive-based program to stimulate small farmers and communities to adopt biomass accumulating measures such as agroforestry or improved forest management. Current vegetation type, land use and stocks of carbon were assessed for an area of around 600 000 ha in southern Mexico, and the carbon (C) sequestration potential of a number of alternative techniques, based on farmers' preferences, was estimated. Cost and benefit flows in US $ per Megagram (= 10(6) g) of carbon (MgC) of each current and alternative system were developed. A model was designed to calculate the expected response to financial incentives of between US SO and $40 per MgC sequestered. The most cost-effective method for sequestering carbon appears to be the improved management of natural forest on communal lands. We estimated that 38 x 10(6) MgC could be sequestered for under US $15 MgC-1, of which 32 x 10(6) MgC through forest management. The choice of a baseline rate of biomass loss under a 'business-as-usual' scenario remains a critical issue for estimates of the cost-effectiveness of carbon sequestration by forestry. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Chiapas MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Ecology;Economics;Environmental Sciences;Environmental Studies U5 - J;Article NT - DUPLICATE AV - English IS - 0921-8009 UR - ISI:000086885700011 L2 - carbon sequestration supply;forest management;land-use change;cost-effectiveness analysis;MANAGEMENT; CHIAPAS; LAND SO - Ecological Economics 2000 ;33(2):313-327 501 UI - 16014 AU - De la Hidalga FJ AU - Deen MJ AU - Gutierrez EA AD - Simon Fraser Univ, Sch Engn Sci, Burnaby, BC V5A 1S6, CanadaINAOE, Puebla 72000, MexicoDe la Hidalga, FJ, Simon Fraser Univ, Sch Engn Sci, Burnaby, BC V5A 1S6, Canada TI - Theoretical and experimental characterization of self-heating in silicon integrated devices operating at low temperatures AB - The self-heating of Si devices operating in the 4K < T < 300 K range is discussed in this work, The temperature-dependent thermal time constant of a typical Si chip is calculated and compared to several electrical relaxation times, Thermal events may be indistinguishable from electrical events at low temperatures, and this makes the transient method an unreliable one for characterizing the cryogenic self-heating. A semi-analytical approach, which considers the temperature dependence of the thermal conductivity of Si, is used to calculate the steady-state thermal profile on the top surface of a Si IC where a devices dissipating power at different ambient temperatures. Theoretical results indicate that the temperature rises measured in earlier works cannot be due to the thermal properties of Si at low temperatures. A test chip containing several integrated Si devices is used to characterize experimentally the self-heating. The strong self-heating usually observed in Si devices operating at very Low temperatures is dominated by the parasitic thermal resistance, of which the ceramic package is the main contributor, The dominance of this parasitic contribution decreases for an increasing ambient temperature and becomes similar to that of the Si device at 300 K MH - Canada MH - Mexico|Puebla PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9383 UR - ISI:000087081700028 L2 - cryogenic electronics;integrated circuits thermal factors;MOSFET's;resistance heating;self-heating;silicon;temperature measurement;MOSFETS; SIMULATION; AMBIENT SO - Ieee Transactions on Electron Devices 2000 ;47(5):1098-1106 502 UI - 14467 AU - De la Mora A AU - Oloriz F AU - Gonzalez-Arreola C AD - Univ Granada, Fac Ciencias, Dept Estratig & Paleontol, Granada 18002, SpainNatl Autonomous Univ Mexico, Inst Geol, Dept Paleontol, Mexico City 04510, DF, MexicoOloriz, F, Univ Granada, Fac Ciencias, Dept Estratig & Paleontol, Granada 18002, Spain TI - 'Autochthonous' bivalve assemblages and palaeoecologic interpretation in the upper Jurassic-Lowermost Cretaceous La Caja Formation from the Canon de San Matias (Zacatecas, Mexico) AB - The present research approaches the precise palaeoecologic interpretation based on the recognition of 12 'autochthonous' bivalve assemblages among 52 registered from the Upper Jurassic-Lowermost Cretaceous La Caja Formation in the Canon de San Matias section (Mexican Altiplano). Fine-grained deposits together with the near-exclusive record of suspension-feeders are considered the evidence for low-energy and nutrient-rich environments. The presence of oxygen-dependent bivalves, mainly Buchia and Lucina, supports the interpretation of oxygenation as a major factor controlling ecology and therefore the composition of the 'autochthonous' bivalve assemblages studied. Significant changes in the composition of bivalve assemblages show no relation between fluctuations in ecological factors and background depositional conditions. (C) 2000 Academie des sciences / Editions scientifiques et medicates Elsevier SAS MH - Mexico|Distrito Federal MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1251-8050 UR - ISI:000166559900008 L2 - bivalves;taphonomy;palaeoecology;Upper Jurassic-Lowermost Cretaceous;Mexico SO - Comptes Rendus de l Academie des Sciences Serie Ii Fascicule A-Sciences de la Terre et des Planetes 2000 ;331(11):741-747 503 UI - 14925 AU - De la Portilla C AU - Cruz A AU - Luna-Garcia H AU - Poulain E AU - Bertin V AU - Castillo S AD - UAMA, CBI, Area Fis, Mexico City 02200, DF, MexicoUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainCastillo, S, UAMA, CBI, Area Fis, Av San Pablo 180, Mexico City 02200, DF, Mexico TI - Theoretical study of interaction of small clusters of IrPt with H-2 AB - The study of the interaction of small clusters of IrPt with H-2 is reported here through ab initio multiconfiguration self-consistent field (MC-SCF) calculations, plus extensive multireference configuration interaction (MR-CI), in its variational and perturbative modes. These calculations provide a cluster model for the activation of hydrogen by IrPt bimetallic catalysts. First, we studied the IrPt dimer interaction with H-2. The five lowest states of the IrPt dimer are: (2)Sigma (+), (2)Delta (xy), (4)Pi (yz), (4)Sigma (+), and (4)Delta (xy). For the IrPt dimer interaction with H-2, we found that the IrPt dimer for both metal sides is able to capture the H-2 molecule without any activation barriers, relaxing the H-H bond. The IrPt2 trimer interaction with H-2 was also studied. The ground and the lowest states of the IrPt2 trimer are a (4)A(1) electronic state and a B-4(2) electronic state, respectively. We found that for both metal sides, the IrPt2 cluster in its ground (4)A(1) and the low-lying B-4(2) electronic states can spontaneously capture and break the hydrogen molecule. Large H-H relaxation is obtained and no activation barriers were found. (C) 2000 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000165108300013 L2 - IrPt clusters;H-2 activation;ab initio studies;bimetallic catalyst;ACTIVATION SO - International Journal of Quantum Chemistry 2000 ;80(4-5):657-663 504 UI - 15381 AU - De la Rosa VG AU - Ordonez M AU - Llera JM AD - Univ Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, E-41071 Seville, SpainUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoLlera, JM, Univ Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, E-41071 Seville, Spain TI - Efficient preparation of enantiomerically pure (E)-gamma-hydroxy-alpha,beta-unsaturated p-tolylsulfoxides using lipase-mediated acylations AB - (E)-gamma-Hydroxy-alpha,beta-unsaturated p-tolylsulfoxides 1 have been efficiently resolved via irreversible enzymatic acylation with lipase PS (Pseudonomas cepacia) and vinyl acetate. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000088856500014 L2 - DIELS-ALDER REACTIONS; ASYMMETRIC-SYNTHESIS; PHENYL SULFONES; 1,3-DIPOLAR CYCLOADDITION; KINETIC RESOLUTIONS; VINYL SULFOXIDE; SULFIDES; DIASTEREOSELECTIVITY; EPOXIDATION; NITRONES SO - Tetrahedron-Asymmetry 2000 ;11(14):2991-3001 505 UI - 15214 AU - De La Torre SD AU - Oleszak D AU - Almeraya F AU - Martinez A AU - Martinez R AU - Rios D AU - Miyamoto H AD - Adv Mat Res Ctr CIMAV, Chih 31109, Mexico. Warsaw Univ Technol, Dept Mat Sci & Engn, PL-02524 Warsaw, Poland. Technol Res Inst Osaka Prefecture, Osaka 5941157, Japan TI - Electrochemical characterization of rapidly-densified Ni-Mo electrodes AB - The spark plasma sintering (SPS) process has been used to densify Ni-Mo powder, which was ball-milled for 800h. Ni-43at%Mo electrodes having different density-grades (open porosity) and various microstructural phases, and so disclosing unique electrochemical reactivity have been produced by sintering the metastable material from 400 to 1300 degrees C in < 6 min (250 degrees C/min). The cathodic-anodic features of these electrodes have been studied by linear sweep voltammetry (LSV)-Tafel techniques and resistance polarization (Rp) at 70 degrees C in aqueous solution of KOH 30%. The results demonstrate that factors such as large surface area, metastability, particle size distribution and galvanic couples are likely to enhance the electrochemical activity of these electrodes. The activation overpotential, i.e. cathodic-Tafel slopes beta c found at low overvoltages are in a range of 25 to 150 mV/dec, whereas the exchange current density for the hydrogen evolution reaction (HER) ranged from 11.15 to 5.75 mA/cm(2) MH - Japan MH - Mexico|Chihuahua MH - Poland T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle2BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMPart 1&2BQ75R AV - English IS - 0255-5476 UR - ISI:000089403900133 L2 - electrocatalyst;HER;hydrogen;mechanical alloying;Ni-Mo;sintering;SPS SO - 2000 ;():855-860 506 UI - 15215 AU - De La Torre SD AU - Kume H AU - Nishikawa Y AU - Inamura S AU - Kakitsuji A AU - Miyamoto H AU - Miyamoto K AU - Rios D AU - Tsuda H AU - Morii K AD - Technol Res Inst Osaka Prefecture, Osaka 5941157, JapanAdv Mat Res Ctr CIMAV, Chih 31109, MexicoUniv Osaka Prefecture, Coll Engn, Dept Met & Mat Sci, Osaka 5998531, JapanDe la Torre, SD, Technol Res Inst Osaka Prefecture, 2-7-1 Ayumino Izumi, Osaka 5941157, Japan TI - Interfaces in alumina-zirconia ceramics for ball-bearing applications AB - Zirconia toughened alumina (ZTA) ceramics have been fabricated for ball-bearing purposes. The microstructure and interface features of -5 and -20wt%ZrO2 ZTA composites have been analyzed by conventional and high resolution transmission electron microscopy HREM. The material strengthening seems to originate from the fine and metastable nature of the sintered composites, from which high-energy (not amorphous) semicoherent interfaces have been observed. Although the t-->m-ZrO2 toughening transformation phenomenon has also been observed it is not considered the only toughening/strengthening mechanism operating in these composites. It has been shown that toughened ZrO2 particles might stretch up its atomic planes along its C-axis twice their typical aperture size (from 0.5 to 1.0nm) and change its lattice planes orientation from 80 to 90 degrees in zones nearby the Al2O3/ZrO2 interface as an attempt to allocate part of the closed-planes of Al2O3 and conserve the interface coherency MH - Japan MH - Mexico|Chihuahua PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000089403900149 L2 - alumina;HIP sintering;HREM;interface;solid solution;zirconia;ZTA;ZRO2 SO - Metastable, Mechanically Alloyed and Nanocrystalline Materials, Pts 1 and 2 2000 ;343-3():973-977 507 UI - 16668 AU - De La Torre SD AU - Oleszak D AU - Kakitsuji A AU - Miyamoto K AU - Miyamoto H AU - Martinez S AU - Almeraya C AU - Martinez V AU - Rios J AD - Technol Res Inst Osaka Prefecture, Izumi, Osaka 5941157, JapanWarsaw Univ Technol, Dept Mat Sci & Engn, PL-02524 Warsaw, PolandCIMAV, Adv Mat Res Ctr, Chihuahua 31109, MexicoDe la Torre, SD, Technol Res Inst Osaka Prefecture, 2-7-1 Ayumino, Izumi, Osaka 5941157, Japan TI - Nickel-molybdenum catalysts fabricated by mechanical alloying and spark plasma sintering AB - The low energy ball milling process has been used to fabricate Ni-43at.%Mo based electro-active powder. Nanometre-sized Mo particles have been embedded into an agglomerated amorphous matrix. The spark plasma sintering (SPS) process has been used to densify the powder in < 6 min at heating rates of about 250 degrees C min(-1) from 400 to 1300 degrees C, applying loads of 120 MPa. High performance porous nickel electrodes having new phases with a particle size range between 1.0 and 8.7 mu m have been obtained after rapid SPS operations. Potentiodynamic polarisation techniques have been used to characterise the hydrogen evolution reaction (HER) in KOH 30% solution at 70 degrees C. The cathodic-Tafel slopes beta c have been found from 25 to 150 mV dec(-1) and appear to decrease as the open porosity of electrodes enlarges. It has been confirmed that the larger porosity (surface roughness) of the electrodes the larger exchange current density I-0 and so their electrocatalytic activity to polarise the HER. In addition to a large surface area and a particle size distribution, the presence of metastable Ni-Mo phases coexisting with MoO2 and the existence of localised galvanic couples are remarkable features conferring the electrodes with unusual reactivity. In this study the microstructure and densification attained are reported on, as well as the preliminary polarisation analysis of these electrodes. (C) 1999 Published by Elsevier Science S.A. All rights reserved MH - Japan MH - Mexico|Chihuahua MH - Poland PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000084583200028 L2 - catalysts;hydrogen;Ni-Mo;electrodes;mechanical alloying;spark plasma sintering (SPS);ALKALINE WATER ELECTROLYSIS; HYDROGEN EVOLUTION REACTION; COMPOSITE-COATED ELECTRODE; ELECTROCATALYSIS; KINETICS; CATHODES SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2000 ;276(1-2):226-235 508 UI - 15034 AU - De Lara LV AU - Becerril C AU - Montano M AU - Ramos C AU - Maldonado V AU - Melendez J AU - Phelps DS AU - Pardo A AU - Selman M AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Autonoma Puebla, Puebla 72190, MexicoInst Nacl Cancerol, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoPenn State Univ, Coll Med, Dept Pediat, Hershey, PA 17033, USASelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502,Col Secc 16, Mexico City 14080, DF, Mexico TI - Surfactant components modulate fibroblast apoptosis and type I collagen and collagenase-1 expression AB - During lung injury, fibroblasts migrate into the alveolar spaces where they can be exposed to pulmonary surfactant. We examined the effects of Survanta and surfactant protein A (SP-A) on fibroblast growth and apoptosis and on type I collagen, collagenase-1, and tissue inhibitor of metalloproteinase (TIMP)-1 expression. Lung fibroblasts were treated with 100, 500, and 1,000 mg/ml of Survanta; 10, 50, and 100 mg/ml of SP-A; and 500 mg/ml of Survanta plus 50 mg/ml of SP-A. Growth rate was evaluated by a formazan-based chromogenic assay, apoptosis was evaluated by DNA end labeling and ELISA, and collagen, collagenase-1, and TIMP-1 were evaluated by Northern blotting. Survanta provoked fibroblast apoptosis, induced collagenase-1 expression, and decreased type I collagen affecting mRNA stability similar to 10-fold as assessed with the use of actinomycin D. Collagen synthesis and collagenase activity paralleled the gene expression results. SP-A increased collagen expression similar to2-fold and had no effect on collagenase-1, TIMP-1, or growth rate. When fibroblasts were exposed to a combination of Survanta plus SP-A, the effects of Survanta were partially reversed. These findings suggest that surfactant lipids may protect against intraluminal fibrogenesis by inducing fibroblast apoptosis and decreasing collagen accumulation MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physiology;Respiratory System U5 - J;Article AV - English IS - 1040-0605 UR - ISI:000090056200022 L2 - pulmonary fibrosis;surfactant protein A;IDIOPATHIC PULMONARY FIBROSIS; HUMAN LUNG FIBROBLASTS; PLATELET-ACTIVATING-FACTOR; GROWTH-FACTOR; GENE-EXPRESSION; INTRAALVEOLAR FIBROSIS; INTERFERON-GAMMA; MESSENGER-RNA; MOUSE MODEL; INJURY SO - American Journal of Physiology-Lung Cellular and Molecular Physiology 2000 ;279(5):L950-L957 509 UI - 16659 AU - De Leon-Saenz E AU - Morales G AU - Guerrero-Santos R AU - Gnanou Y AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoUniv Bordeaux 1, Ecole Natl Super Chim & Phys Bordeaux, CNRS, Lab Chim Polymeres Organ,UMR 5629, F-33402 Talence, FranceGuerrero-Santos, R, Ctr Invest Quim Aplicada, Blvd Enrique Reyna Hermosillo 140, Saltillo 25000, Coahuila, Mexico TI - New insights into the mechanism of 1,2-bis(trimethylsilyloxy)-tetraphenylethane-induced free radical polymerization: application to the synthesis of block and graft copolymers AB - 1,2-Bis(trimethylsilyoxy)tetaphenylethane (TPSE) was used to polymerize used to polymerize metyl methacrylate (MMA) and styrene (S) between 70 and 130 degrees C, TPSE is actually found to act as an initiator in the case of MMA and as a terminating agent as well. Chain propagation is controlled by the reversible deactivation of growing polymeric radicals with diphenylmethyl (DPM) radicals that result from the homolytic decomposition of TPSE. decomposition of TPSE. In the case of styrene, the mechanism is more complex: chain growth appears to involve the degenerative transfer of TPSE hemifragments (DPM) from chain to chain; unfortunately, this process is not efficient enough to curb irreversible termination. The conditions that are most appropriate to prepare block:and graft copolymers using TPSE as initer are described. Copolymers constituted of poly(methyl methacrylate) (PMMA) grafts or blocks with relatively well-defined structures are obtained with this technique MH - France MH - Mexico|Coahuila PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1352 UR - ISI:000084759200010 L2 - METHYL-METHACRYLATE; STYRENE POLYMERIZATION; LIVING POLYMERIZATION; SUBSTITUTED ETHANES; TRIBLOCK COPOLYMERS; CHAIN-ENDS; KINETICS; INIFERTERS; POLYMERS; TETRAPHENYLETHANES SO - Macromolecular Chemistry and Physics 2000 ;201(1):74-83 510 UI - 15663 AU - de Leon FCP AU - Goodrich JT AU - Tutino M AU - Gordon C AD - Hosp Infantil Mexico, Dept Pediat Neurosurg, Mexico City, DF, MexicoAlbert Einstein Coll Med, Leo Davidoff Dept Neurol Surg, Div Pediat Neurosurg, Bronx, NY 10467, USAUniv Palermo, Univ Hosp, Dept Surg, Palermo, ItalyGeorgetown Univ, Washington, DC, USAGoodrich, JT, Montefiore Med Ctr, Div Pediat Neurosurg, 111 E 210th St, Bronx, NY 10467 USA TI - First published record of a neurosurgical procedure on the North American continent, Mexico City, by Pedro Arias de Benavides, 1561: Secretos de Chirurgia, Valladolid, Spain, 1567 AB - THE FIRST PUBLISHED account of a neurosurgical intervention performed on the North American continent is described. The operation took place in Mexico City in 1561. The neurosurgical intervention was performed by a Spanish surgeon, Pedro Arias de Benavides, on a 13-year-old boy who had sustained head trauma that caused an open depressed cranial fracture and exposed the cerebrum. A description of this case was first published in Valladolid, Spain, 6 years after the event, in a book entitled Secretos de Chirurgia ("Secrets of Surgery") MH - Italy MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology;Surgery U5 - J;Article AV - English IS - 0148-396X UR - ISI:000088133800113 L2 - cranial fracture;history;skull fracture;trauma SO - Neurosurgery 2000 ;47(1):216-222 511 UI - 15450 AU - de Leon JM AU - Perez VA AU - Espinosa FJ AU - Jimenez-Sandoval S AU - Lopez-Lopez S AU - Montano PA AD - Cinvestav Merida, Dept Fis Aplicada, Merida 97133, Yuc, MexicoCinvestav Queretaro, Lab Invest Mat, Queretaro 76001, MexicoCinvestav Mexico, Dept Fis, Mexico City 07000, DF, MexicoArgonne Natl Lab, Adv Photon Source, BESSRC CAT, Argonne, IL 60439, USADe Leon, JM, Cinvestav Merida, Dept Fis Aplicada, AP 73, Merida 97133, Yuc, Mexico TI - Atomic local structure around Cu in CuxCd1-xTe thin films AB - X-ray absorption spectroscopy (XAS) was used to investigate the local atomic structure around Cu atoms in CuxCd1-xTe thin films, for x = 10 and 15 at.% nominal Cu concentrations. X-ray absorption near edge spectra (XANES) reveal a Cu local electronic structure different from that encountered in Cu metal. X-ray diffraction measurements have shown the presence of a single zincblende phase even for 15 at.% nominal Cu concentration. However, X-ray absorption fine structure (XAFS) spectra show Cu-Cu distances characteristic of Cu metal clusters, and Cu-Te distances significantly shorter than the CdTe nearest neighbor distance. These results imply the occurrence of microscopic phase separation in this material, and significant lattice distortions around the Cu incorporated in the CdTe matrix MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Yucatan MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800040 SO - Physica Status Solidi B-Basic Research 2000 ;220(1):227-231 512 UI - 15456 AU - de Leon JM AU - de Coss R AU - Rubio-Ponce A AU - Pali R AU - Bishop AR AU - Trugman SA AD - IPN, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoUniv Calif Los Alamos Natl Lab, Los Alamos, NM 87545, USADe Leon, JM, IPN, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, Mexico TI - Polaronic signatures in phonon isotopic shifts AB - The isotopic shift of c-axis O(4)-related phonon frequencies in YBa2Cu3O7 is calculated using a model electron-phonon Hamiltonian. This Hamiltonian was previously used to describe the dynamics of the O(4)-Cu(1)-O(4) cluster. The model includes electronic correlations and electron-phonon interactions, exhibiting polaron tunneling. The calculated isotopic shifts of phonon excitations differ from these found using harmonic or anharmonic potentials, and are consistent with results of optical measurements. The isotopic substitution also changes the dynamics of polaron tunneling and produces a change in the local structure of the cluster MH - Mexico|Yucatan MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800089 L2 - CUO2 PLANE; SUPERCONDUCTORS; LATTICE; OXYGEN; SCATTERING; LA1.85SR0.15CUO4; YBA2CU3O7-DELTA; ANHARMONICITY; SUBSTITUTION; SPECTROSCOPY SO - Physica Status Solidi B-Basic Research 2000 ;220(1):499-502 513 UI - 15819 AU - de Leon JM AU - Espinosa FJ AU - Perez VA AU - Jimenez-Sandoval S AU - Lopez-Lopez S AU - Montano PA AD - CINVESTAV, Dept Fis Aplicada, Merida 97133, Yucatan, MexicoCINVESTAV, Lab Invest Mat, Queretaro 76001, MexicoCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoArgonne Natl Lab, Adv Photon Source, CAT, BESSRC, Argonne, IL 60439, USAde Leon, JM, CINVESTAV, Dept Fis Aplicada, AP 73, Merida 97133, Yucatan, Mexico TI - Local atomic environment of Cu : CdTe thin film alloys AB - We have used X-ray absorption spectroscopy of the K-edge of each element in a Cd0.85Cu0.15Te thin film to investigate the local atomic structure around each constituent element. X-ray absorption near edge spectra reveal that the local electronic structure around Cd and Te atoms is similar to that of undoped CdTe, while that of Cu is different from that encountered in Cu metal. X-ray absorption fine structure spectra show that while the Cd near neighbor environment is similar to that of undoped CdTe, the Te environment shows differences compared with that found in undoped CdTe, consistent with Cu entering substitutionally for Cd. The Cu nearest neighbor environment suggests the presence of Cu-metal ligands characteristic of Cu metal clusters. These results imply the occurrence of microscopic phase separation in this material in variance with X-ray diffraction results that show a single crystalline phase. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Yucatan MH - USA PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000087737600006 L2 - semiconductor alloys;solar cells;doping limits;local atomic structure SO - Microelectronics Journal 2000 ;31(6):429-431 514 UI - 16526 AU - de los Monteros AE AD - Amer Museum Nat Hist, Dept Ornithol, New York, NY 10024, USAde los Monteros, AE, Inst Ecol AC, Dept Ecol & Comportamiento Anim, Carretera Antigua Coatepec Km 2-5,Apartado Postal, Xalapa 91000, Veracruz, Mexico TI - Higher-level phylogeny of Trogoniformes AB - Phylogenetic relationships between Trogoniformes and several other putative closely related groups of birds, based on complete cytochrome b and nearly complete 12S ribosomal RNA sequences, were studied. The taxa included trogons, owls, cuckoos, parrots, nightjars, hummingbirds, kingfishers, motmots, rollers, mousebirds, and woodpeckers. The group most commonly suggested as the nearest relative to trogons had been the coraciiforms (kingfishers, rollers, and allies) but this hypothesis was not supported, It appeared that Trogons are more closely related to mousebirds, parrots, and perhaps cuckoos than to coraciiforms. Conflicting results, however, prevented precise determination of higher-level phylogenetic affinities of trogons, A saturation analysis showed evident saturation in cytochrome b third positions and 12S loops. After saturated partitions were removed, the phylogeny supported the mousebirds (Coliiformes) as the sister taxon to trogons, Phylogenetic inconsistencies appeared to be attributable to an imbalance between the lengths of terminal and internodal branches, Apparently, the limited number of characters supporting internodal branches exemplifies a relatively rapid cladogenesis at an early period in the evolutionary history of these birds. (C) 2000 Academic Press MH - Mexico|Veracruz MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 26 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000085215400003 L2 - 12S RIBOSOMAL-RNA; CYTOCHROME-B GENE; EVOLUTIONARY RELATIONSHIPS; DNA-SEQUENCES; BIRDS; BRANCH; MAMMALS; TREES SO - Molecular Phylogenetics and Evolution 2000 ;14(1):20-34 515 UI - 15842 AU - De Luna E AU - Buck WR AU - Akiyama H AU - Arikawa T AU - Tsubota H AU - Gonzalez D AU - Newton AE AU - Shaw AJ AD - Inst Ecol AC, Dept Sistemat Vegetal, Xalapa 91000, Veracruz, MexicoNew York Bot Garden, Bronx, NY 10458, USAMuseum Nat & Human Activities, Sanda, Hyogo 6691546, JapanUniv Tokyo, Grad Sch Sci, Dept Biol Sci, Bunkyo Ku, Tokyo 1130033, JapanHiroshima Univ, Grad Sch Sci, Biol Sci Course, Hiroshima 7398526, JapanNat Hist Museum, Dept Bot, London SW7 5BD, EnglandDe Luna, E, Inst Ecol AC, Dept Sistemat Vegetal, Xalapa 91000, Veracruz, Mexico TI - Ordinal phylogeny within the hypnobryalean pleurocarpous mosses inferred from cladistic analyses of three chloroplast DNA sequence data sets: trnL-F, rps4, and rbcL AB - Classification of families of hypnobryalean mosses into the Hypnales, Leucodontales, and Hookerials has been taxonomically difficult. Several researchers have sequenced different genes for independent phylogenetic studies of these three pleurocarp groups. Our goal is to summarize available molecular data and compile the largest data set to infer phylogenetic relationships among families as basis for classification at ordinal level. Sequences of rbcL, trnL-F, and rps4 loci for 38 exemplars of most families of Hypnales, Leucodontales, and Hookeriales were analyzed to evaluate whether or not each of the three orders is monophyletic. Cladistic analyses of combined sequences, using five taxa in the Bryales as outgroups, reveal a robust clade (decay > 5) including all hypnobryalean pleurocarps. Within this group, one clade (decay = 2) includes only taxa of the Hookeriales, and is sister to a large monophyletic group (Hypnales sensu lato) containing all other taxa (decay = 2) previously in the Leucodontales since major lineages detected do not correspond to the traditional Leucodontales or Hypnales. These two orders are not supported by any molecular evidence from rbcL, trnL-F, or rps4, either analyzed singly or in different combinations. Additionally, present results indicate the need for changes to the current system of three suborders of Hypnales and four of the Leucodontales. Phylogenetic reconstructions based on molecular data emphasize the need for a re-examination of the taxonomic relevance of morphological characters and corroborate previous interpretations of sporophytic morphological similarities as multiple transitions to similar solutions to epiphytism among the pleurocarps MH - United Kingdom MH - Japan MH - Mexico|Veracruz MH - USA PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 22 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000087713200005 L2 - GENE-SEQUENCES; RIBOSOMAL DNA; CIRCUMSCRIPTION; MUSCI SO - Bryologist 2000 ;103(2):242-256 516 UI - 16259 AU - De Mendoza MEL AU - Modha J AU - Roberts MC AU - Curtis R AU - Kusel JR AD - INIFAP, SAGAR, Ctr Nacl Invest Disciplinarias Parasitiol Vet, Jiutepec 62500, Morelos, MexicoAFRC, Inst Arable Crops Res, Dept Entomol & Nematol, Harpenden AL5 2JQ, Herts, EnglandUniv Glasgow, Inst Biomed & Life Sci, Div Biochem & Mol Biol, Glasgow G12 8QQ, Lanark, ScotlandDe Mendoza, MEL, INIFAP, SAGAR, Ctr Nacl Invest Disciplinarias Parasitiol Vet, Apdo Postal 206, Jiutepec 62500, Morelos, Mexico TI - Changes in the lipophilicity of the surfaces of Meloidogyne incognita and Haemonchus contortus during exposure to host signals AB - The surfaces of plant and animal parasitic nematodes share certain lipids, which seem to be important in the infection process. The surfaces of 2 parasitic nematodes, Meloidogyne incognita and Haemonchus contortus, were activated by different pH buffers to allow the insertion of different fluorescent probes. The lipid analogue PKH26 and the surface charge indicator, cationized ferritin, were used as probes with these nematodes but labelled only the retaining 2nd-stage moulted cuticle of H. contortus 3rd-stage larvae (L-3). Shedding of the second moult of H. contortus L-3 was also visualized with PKH26 and cationized ferritin. The fluorescent anionic lipid probe 5-N-(octadecanoyl)-aminofluorescein (AF18) was inserted into the epicuticle layer of M. incognita 2nd-stage juveniles (J(2)) and H. contortus L-3, and also of the second moult of H. contortus L-3. Incubation with tomato root diffusate caused modifications of the M. incognita surface allowing the insertion of AF18. Fluorescence with AF18 was significantly decreased after treating M. incognita J(2) with amiloride, a potent blocker of hydrogen and sodium (H+/Na+) antiporter. No surface fluidity was observed in M. incognita J(2) and H. contortus L-3 pre-treated with alkaline buffer when the lipid analogue AF18 was used in fluorescence recovery after photobleaching experiments. The significance of these findings to host infection processes is discussed MH - United Kingdom MH - Mexico|Morelos PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0031-1820 UR - ISI:000086182100011 L2 - Meloidogyne incognita;Haemonchus contortus;fluorescent probes;pH;root diffusate;surface fluidity;PARASITIC NEMATODES; TRANSITION; INTESTINE; IMMUNITY; MEMBRANE; LARVAE; FORMS SO - Parasitology 2000 ;120():203-209 517 UI - 15081 AU - de Nava JMM AU - Gorsline DS AD - IPN, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja California, MexicoUniv So Calif, Dept Earth Sci, Los Angeles, CA 90089, USAde Nava, JMM, IPN, Ctr Interdisciplinario Ciencias Marinas, Apartado Postal 592, La Paz 23000, Baja California, Mexico TI - Holocene and modern dune morphology for the Magdalena coastal plain and islands, Baja California Sur, Mexico AB - Moderate to well-defined Holocene and Recent dunes are present on the surface of the Magdalena coastal plain and on the top of sandy barrier islands of the Magdalena Lagoonal Complex in Baja California Sur, Mexico. Early Holocene to Late Holocene aeolian deposits are mostly mega barchans (20 to 60 m high), linear dunes (10 m high), dune ridges (60 to 80 m high), nabkha dunes (5 to 10 m high), and a sand sheet (20 m high). Modern dunes are mostly crescentic dunes (transverse and meso barchans, 5 to 10 m in height), a dune ridge (40 m high), foredunes (5 m high), and nabkhas (1 to 5 m high). Holocene dunes are covered by semi-desertic vegetation. The abandoned vegetated old dune scarps and evidences of sea water land intrusion suggest a local older higher sea level, which probably occurred at global Holocene maximum sea level. Present erosional and depositional processes can be observed on the modern local coasts MH - Mexico|Baja California MH - USA PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000089758800037 L2 - Holocene dunes;geomorphology;coastal erosion;sea water land intrusion;erosional and depositional processes SO - Journal of Coastal Research 2000 ;16(3):915-925 518 UI - 16076 AU - de Oca-Ramirez GM AU - Rios-Guerrero L AU - Trejo-O'Reilly JA AU - Flores-Rosete G AU - Guyot A AU - Guillot J AU - Bourgeat-Lami E AD - LCPP, F-69616 Villeurbanne, FranceCid, Ctr Invest & Desarrollo Tecnol, SA CV, Mexico City 52000, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, Mexicode Oca-Ramirez, GM, LCPP, F-69616 Villeurbanne, France TI - Synthesis and characterization of monoalkyl maleates and their use in emulsion polymerization of vinyl acetate AB - Different monoalkyl maleates (MAM) have been synthesized and used as functional (co)monomers in the emulsion polymerization of vinyl acetate (VAM). Vinyl acetate was added either in batch or semicontinuously in order to improve the incorporation yield of the comonomers. The monoalkyl maleates and the different latexes obtained were fully characterized using nuclear magnetic resonance spectroscopy (H-1 NMR and C-13 NMR), differential scanning calorimetry (DSC) and gel permeation chromatography (GPC). We demonstrated that the monoalkyl maleates were entirely reacted and incorporated in the copolymers. When using a semicontinuous addition process for vinyl acetate, it was found that the monoalkylmaleates were mostly contained into copolymers which are extractable from the latex particles by centrifugation. We showed that these extractable copolymers contain around 28 weight percent of monoalkyl maleate which concentration is larger than the concentration of monoalkyl maleate in the feed. The incorporated monoalkyl maleates contribute to a decrease of the glass transition temperature of the copolymers MH - France MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1360 UR - ISI:000086785300024 SO - Macromolecular Symposia 2000 ;150():161-169 519 UI - 14679 AU - de Oca RM AU - Buendia AJ AU - Sanchez J AU - Del Rio L AU - Seva J AU - Navarro JA AU - Salinas J AD - Univ Murcia, Fac Vet, Dept Histol & Anat Patol, E-30001 Murcia, SpainUniv Murcia, Fac Vet, Dept Patol Anim Microbiol & Inmunol, E-30001 Murcia, SpainUniv Autonoma Estado Mexico, Fac Vet, Dept Salud Anim, Toluca, MexicoSalinas, J, Univ Murcia, Fac Vet, Dept Patol Anim Microbiol, Campus Espinardo, E-30100 Murcia, Spain TI - Limited role of polymorphonuclear neutrophils in a pregnant mouse model of secondary infection by Chlamydophila abortus (Chlamydia psittaci serotype 1) AB - The aim of this work was to study the role of polymorphonuclear neutrophils (PMNs) in the clearance of infection, and in the development of specific immunity against Chlamydophila abortus (Chlamydia psittaci serotype 1) secondary infection. A pregnant mouse model depleted of neutrophils by the RB6-8C5 monoclonal antibody was used. No clinical signs were observed in depleted or nondepleted mice after secondary infection and no significant differences were observed in the litter size between the infected and control groups. In PMN-depleted mice C. abortus was not detected in the materno-fetal unit but merely produced low, persistent levels of infection in spleen and liver. In the non-depleted mice the level of infection was significantly lower, being resolved during the first few days post-reinfection. In both infected mice groups the immune response in the liver was quickly established and was seen to be composed mainly of CD4(+) T lymphocytes and macrophages. A Th1 response characterized by the presence of IFN-gamma and TNF-alpha in serum was observed during early infection, with significantly higher levels in the non-depleted animals. Our results suggest that PMNs have little influence on the control of C. abortus secondary infection, although they are a first line of defense and may influence the early production of TNF-alpha. and IFN-gamma. (C) 2000 Academic Press MH - Mexico|Estado De Mexico MH - Spain PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Microbiology U5 - J;Article AV - English IS - 0882-4010 UR - ISI:000165885000001 L2 - Chlamydophila abortus;neutrophils;secondary infection;abortion;LISTERIA-MONOCYTOGENES; MURINE MODEL; TNF-ALPHA; MONOCLONAL-ANTIBODIES; ACQUIRED-IMMUNITY; HOST-DEFENSE; IFN-GAMMA; MICE; CELLS; IL-12 SO - Microbial Pathogenesis 2000 ;29(6):319-327 520 UI - 16505 AU - de Oca RM AU - Buendia AJ AU - Del Rio L AU - Sanchez J AU - Salinas J AU - Navarro JA AD - Univ Murcia, Fac Vet, Dept Patol Anim Microbiol & Inmunol, E-30100 Murcia, SpainUniv Murcia, Fac Vet, Dept Histol & Anat Patol, E-30100 Murcia, SpainUniv Autonoma Estado Mexico, Fac Vet, Dept Salud Anim, Toluca, MexicoSalinas, J, Univ Murcia, Fac Vet, Dept Patol Anim Microbiol & Inmunol, Campus Espinardo, E-30100 Murcia, Spain TI - Polymorphonuclear neutrophils are necessary for the recruitment of CD8(+) T cells in the liver in a pregnant mouse model of Chlamydophila abortus (Chlamydia psittaci serotype 1) infection AB - The role of polymorphonuclear neutrophils (PMNs) in the development of the specific immune response against Chlamydophila abortus (Chlamydia psittaci serotype I) infection,vas studied in a pregnant mouse model involving treatment with RB6-8C5 monoclonal antibody. PMN depletion significantly affected the immune response in the liver, in which the T-lymphocyte and F4/80(+) cell populations decreased, particularly the CD8(+) T-cell population. A Th1-like response, characterized by high levels of gamma interferon without detectable levels of interleukin 4 (IL-4) in serum, was observed in both depleted and nondepleted mice, although an increased production of IL-10 was detected in the depleted group. Our results suggest that PMNs play a very important role in the recruitment of other leukocyte populations to the inflammatory foci but have little influence in the polarization of the immune specific response toward a Th1-like response MH - Mexico|Estado De Mexico MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 36 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000085407400103 L2 - TRACHOMATIS INFECTION; IFN-GAMMA; MONOCLONAL-ANTIBODY; IMMUNE-RESPONSE; GENITAL-TRACT; MICE; EXPRESSION; CYTOKINES; IL-12 SO - Infection and Immunity 2000 ;68(3):1746-1751 521 UI - 16325 AU - de Quadros CA AU - Tambini G AU - DiFabio JL AU - Brana M AU - Santos JI AD - Pan Amer Hlth Org, Div Vaccines & Immunizat, Washington, DC, USAMinist Hlth, Natl Council Vaccinat CONAVA, Mexico City, DF, Mexicode Quadros, CA, Pan Amer Hlth Org, Div Vaccines & Immunizat, Washington, DC USA TI - State of immunization in the Americas AB - Countries in the Americas have led the world in conquering infectious diseases preventable through vaccination. In 1971, the Western hemisphere achieved smallpox eradication. In 1991, the Americas were free of indigenous transmission of wild poliovirus. in 1998, overall regional vaccination coverage was 86% for diphtheria-pertussis-tetanus, 89% for oral poliovirus vaccine 3, 98% for bacille Calmette-Guerin vaccine, and 85% for measles. These figures confirm that most of the children in the Americas are protected against these diseases. The breakthroughs obtained in immunization have stimulated countries to promote new initiatives aimed at the control and eradication of other vaccine-preventable diseases and to introduce new vaccines into routine schedules. In the 21st century, vaccines will remain the most cost-effective means of preventing diseases and avoiding expensive treatment costs MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0891-5520 UR - ISI:000086069700014 L2 - STREPTOCOCCUS-PNEUMONIAE; SURVEILLANCE SO - Infectious Disease Clinics of North America 2000 ;14(1):241-+ 522 UI - 15986 AU - de Riscala EC AU - Turbay S AU - Catalan CAN AU - Hernandez LR AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Tucuman, Fac Agron & Zootecn, Catedra Quim Organ, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaUniv Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 17-740, Mexico City 07000, DF, Mexico TI - A glycosidic eudesmanolide from Hyaloseris salicifolia AB - The flowers of Hyaloseris salicifolia afforded known ivasperin, while the leaves afforded ivasperin and 2-O-(6'-O-acetyl-beta-D-glucopyranosyl)-ivasperin, whose structure was determined by spectroscopic methods. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000086975500011 L2 - Dinoseris salicifolia;Hyaloseris salicifolia;Mutisieae;Compositae;eudesmanolide;sesquiterpene lactone;glucoside SO - Phytochemistry 2000 ;53(8):873-876 523 UI - 15336 AU - de Rudder KEE AU - Lopez-Lara IM AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoTech Univ Berlin, Inst Biotechnol, D-13353 Berlin, GermanyGeiger, O, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apartado Postal 565-A, Cuernavaca 62210, Morelos, Mexico TI - Inactivation of the gene for phospholipid N-methyltransferase in Sinorhizobium meliloti: phosphatidylcholine is required for normal growth AB - In phosphatidylcholine (PC)-containing prokaryotes, only the methylation pathway of PC biosynthesis was thought to occur. However, a second choline-dependent pathway for PC formation, the PC synthase (Pcs) pathway, exists in Sinorhizobium (Rhizobium) meliloti in which choline is condensed with CDP-diacylglyceride. Here, we characterize the methylation pathway of PC biosynthesis in S. meliloti. A mutant deficient in phospholipid N-methyltransferase (Pmt) was complemented with a S. meliloti gene bank and the complementing DNA was sequenced. A gene coding for a S-adenosylmethionine-dependent N-methyltransferase was identified as the sinorhizobial Pmt, which showed little similarity to the corresponding enzyme from Rhodobacter sphaeroides. Upon expression of the sinorhizobial Pmt, besides phosphatidylcholine, the methylated intermediates of the methylation pathway, monomethylphosphatidylethanolamine and dimethylphosphatidylethanolamine, are also formed. When Pmt-deficient mutants of S. meliloti are grown on minimal medium, they cannot form PC, and they grow significantly more slowly than the wild type. Growth of the Pmt-deficient mutant in the presence of choline allows for PC formation via the Pcs pathway and restores wild-type-like growth. Double knock-out mutants, deficient in Pmt and in Pcs, are unable to form PC and show reduced growth even in the presence of choline. These results suggest that PC is required for normal growth of S. meliloti MH - Germany MH - Mexico|Morelos PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 24 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000089054100008 L2 - ADENOSYLMETHIONINE-DEPENDENT METHYLTRANSFERASES; RHIZOBIUM-MELILOTI; ESCHERICHIA-COLI; BIOSYNTHESIS; CLONING; PHOSPHATIDYLETHANOLAMINE; PROKARYOTES; MUTAGENESIS; METHYLATION; EXPRESSION SO - Molecular Microbiology 2000 ;37(4):763-772 524 UI - 15983 AU - de Sousa GF AU - West DX AU - Brown CA AU - Swearingen JK AU - Valdes-Martinez J AU - Toscano RA AU - Hernandez-Ortega S AU - Horner M AU - Bortoluzzi AJ AD - Illinois State Univ, Dept Chem, Normal, IL 61790, USAUniv Brasilia, Inst Quim, BR-70919900 Brasilia, DF, BrazilNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Fed Santa Maria, Dept Quim, BR-97119900 Rio Grande Sul, RS, BrazilWest, DX, Illinois State Univ, Dept Chem, Normal, IL 61790, USA TI - Structural and spectral studies of a heterocyclic N(4)-substituted bis(thiosemicarbazone), H(2)2,6Achexim center dot H2O, its heptacoordinated tin(IV) complex [Bu2Sn(2,6Achexim)], and its binuclear zinc(II) complex [Zn(2,6Achexim)](2) AB - The multidentate ligand, 2,6-diacetylpyridine bis(3-hexamethyleneiminylthiosemicarbazone) monohydrate, H(2)2,6Achexim . H2O, crystallizes with one thiosemicarbazone moiety in an intramolecular hydrogen bonded, bifurcated E' form. The other thiosemicarbazone moiety is E and is not involved in intramolecular hydrogen bonding, but is involved in hydrogen bonding with the hydrate water molecule. The dianion (loss of N3a and N3b hydrogens) of H(2)2,6Achexim acts as a pentadentate ligand, 2,6Achexim, in a planar conformation to a central tin(IV) ion, and as a bridging tetradentate ligand with the two thiosemicarbazone moieties of 2,6Achexim coordinating to different zinc atoms. The tin(IV) is heptacoordinate in a distorted pentagonal dipyramidal configuration, with the five SNNNS donor atoms of 2,6Achexim in the pentagonal plane and the two n-butyl groups in the axial positions. The binuclear zinc complex has two equivalent tetrahedral zinc centers, with the pyridyl nitrogens of the two ligands not coordinated. (C) 2000 Elsevier Science Ltd All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 32 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000087093900017 L2 - heterocyclic bis(thiosemicarbazone);heptacoordinate complexes;organotin(IV) complexes;binuclear zinc complexes;CRYSTAL-STRUCTURE; THIOSEMICARBAZONES; NICKEL(II) SO - Polyhedron 2000 ;19(7):841-847 525 UI - 15032 AU - De Teresa L AU - Zuazua E AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Complutense Madrid, Dept Matemat Aplicada, E-28040 Madrid, Spain TI - Null controllability of linear and semilinear heat equations in thin domains AB - We consider the linear heat equation with potential in a n-dimensional thin cilinder Omega (epsilon)=Omegax(0,epsilon) where Omega is a bounded open smooth set of Rn-1 with n greater than or equal to2 and epsilon is a small parameter. We study the null controllability problem when the control acts in a cylindrical region omega (epsilon)=omegax(0,epsilon), where omega subset of Omega is an open and non-empty subset of Omega. We prove that, under appropriate boundary conditions, for a suitable class of potentials the heat equation is uniformly null controllable as epsilon -->0. We also prove the convergence of the controls to a null control for the n-1-dimensional heat equation in Omega. Similar results are proved for the semilinear heat equation with globally Lipschitz nonlinearities MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0921-7134 UR - ISI:000090058100006 L2 - BOUNDARY SO - Asymptotic Analysis 2000 ;24(3-4):295-317 526 UI - 16447 AU - De Vizcaya-Ruiz A AU - Rivero-Muller A AU - Ruiz-Ramirez L AU - Kass GEN AU - Kelland LR AU - Orr RM AU - Dobrota M AD - Univ Surrey, Sch Biol Sci, Guildford GU2 5XH, Surrey, EnglandNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoInst Canc Res, CRC, Ctr Canc Therapeut, Sutton SM2 5NG, Surrey, EnglandDe Vizcaya-Ruiz, A, Univ Surrey, Sch Biol Sci, Guildford GU2 5XH, Surrey, England TI - Induction of apoptosis by a novel copper-based anticancer compound, casiopeina II, in L1210 murine leukaemia and CH1 human ovarian carcinoma cells AB - The activity of casiopeina II \Cu(1,4-dimethyl-1,10-phenanthroline)(glycine)NO3\ a novel anticancer agent, was tested in two cell lines, L1210 murine leukaemia, CH1 human ovarian carcinoma, cisplatin-resistant and sensitive, Exposure of the cells to a range of concentrations of casiopeina II indicates that this copper complex kills cells by apoptosis and necrosis, Condensed chromatin and nuclear fragmentation were observed after exposure to casiopeina II. The caspase inhibitor Z-Val-Ala-DL-Asp-fluoromethylketone (Z-VAD-FMK) almost completely inhibited apoptosis induced by cisplatin; hen-ever, casiopeina II-induced apoptosis was inhibited only by 50-70%. These data are consistent with caspase activation (measured by Z-Asp-Glu-Val-Asp-7-amino-4-trifluoromethylcoumarin; Z-DEVD-AFC) by casiopeina II and cisplatin and confirm that caspases are activated in the apoptotic cell death induced by casiopeina II. DNA fragmentation was observed in L1210 cells, but not in CH1 cells. No difference in susceptibility to induction of apoptosis by casiopeina II was found between sensitive and cisplatin resistant cells. In this work we show that the novel copper-based antineoplastic agent casiopeina II is highly active against murine and human canter cell Lines, including cell Lines resistant to cisplatin. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Toxicology U5 - J;Article AV - English IS - 0887-2333 UR - ISI:000085523900001 L2 - cancer chemotherapy;copper complexes;apoptosis;POLY(ADP-RIBOSE) POLYMERASE; DEATH; CASPASES; CLEAVAGE; CHEMOTHERAPY; ACTIVATION; MITOCHONDRIA; COMPLEXES; DNA SO - Toxicology in Vitro 2000 ;14(1):1-5 527 UI - 11277 AU - Debeaufort F AU - Quezada-Gallo JA AU - Voilley A AD - Univ Bourgogne 1, Lab Genie Procedes Alimentaires & Biotechnol, ENSBANA, F-21000 Dijon, France. IUT Genie Biol, F-21014 Dijon, France. CONACyT, Mexico City, DF, Mexico TI - Edible barriers: A solution to control water migration in foods AB - The loss of food quality depends often on migration of small molecules such as water, salts, pigments or aroma compounds. traditional packagings allows to reduce transfer, but only between food and the surrounding medium. Edible Films and particularly coatings allows it too, but they can be applied inside the food such as between fruits and baked pastry in a pie. A wide range of substances from animal or vegetal origin can be used to formulate an edible barrier. The formulation have to be set up as a function of both food composition and hedonic property, and of the nature of the migrant, Thermodynamics and kinetics of the transfer mechanism, the structure of the barrier and the nature of the diffusing substance, affect tremendously the barrier performances of edible packagings MH - France MH - Mexico|Distrito Federal T3 - FOOD PACKAGING: TESTING METHODS AND APPLICATIONSAcs symposium series PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - S;Review NT - SEnglishReview01155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USAACS SYMP SERBU14R AV - English IS - 0097-6156 UR - ISI:000175160800002 SO - 2000 ;():9-16 528 UI - 15636 AU - Dechoum K AU - de la Pena L AU - Santos E AD - Univ Cantabria, Dept Fis Moderna, E-39005 Santander, SpainUNAM, Inst Fis, Mexico City, DF, MexicoDechoum, K, Univ Cantabria, Dept Fis Moderna, E-39005 Santander, Spain TI - The problem of light detection in the presence of zeropoint fluctuations: A physical model for the vision of weak signals AB - We examine the possibility of obtaining a model of human vision within the context of a purely wave theory of light, including the zero-point field. We show that the model meets one of the main objections to this assumption, namely that photodetectors should be activated to saturation by the zeropoint field alone. A straightforward consequence of the model is the existence of a minimal signal intensity which may be discriminated by the human eye from the (huge) zeropoint intensity. The threshold predicted by the model roughly agrees with empirical results MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0894-9875 UR - ISI:000088291600004 L2 - light detection;zeropoint fluctuations;vision SO - Foundations of Physics Letters 2000 ;13(3):253-264 529 UI - 15342 AU - Decouchant D AU - Martinez-Enriquez AM AD - Lab Logiciels Syst Reseaux, Grenoble, France. IPN, CINVESTAV, Dept Ingn Elect, Secc Computac, Mexico City 07738, DF, Mexico TI - A cooperative, deductive, and self-adaptive Web authoring environment AB - Related to the cooperative editing research domain and to the works currently developed on the World Wide Web, we present Alliance-Web, an editing and cooperative authoring system on the Web. Using this system, authors distributed among the world can cooperate producing large documentations in a consistent and concerted way. Taking benefits of the design and experiment of the Alliance cooperative editor on Internet, the Alliance-Web approach proposes a mixed architecture (hybrid and/or fully distributed) for the document storage and access. These two architectures are integrated to provide a concerted, secure and parameterizable cooperative editing support. Following that, we highlight the main aspects of the group awareness function which allows each author to diffuse his contribution to other coauthors, and to control the way by which other contributions are integrated in his environment. In order to support this function, Fundamental for every groupware application, techniques of Artificial Intelligence research domain allow to design and to define a self-adaptive cooperative interaction environment, parametrized by user preferences. Thus, the problem and the characteristics of a group awareness inference engine are defined MH - France MH - Mexico|Distrito Federal T3 - MICAI 2000: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBQ61W AV - English IS - 0302-9743 UR - ISI:000088970800041 L2 - cooperative and distributed authoring;World Wide Web;group awareness inference engine;deductive and adaptive cooperation interface SO - 2000 ;():443-457 530 UI - 15931 AU - Decroix J AU - Partsch H AU - Gonzalez R AU - Mobacken H AU - Goh CL AU - Walsh JB AU - Shukla S AU - Naisbett B AD - Cabinet Dermatol, B-7700 Mouscron, BelgiumWilhelminenspital, Dept Dermatol, Vienna, AustriaHosp Secc, Monterrey, MexicoGothenburg Univ, Sahlgrens Hosp, Dept Dermatol, S-41345 Gothenburg, SwedenNatl Skin Ctr, Singapore 1130, SingaporeSt James Hosp, Dept Med Elderly, Dublin 8, IrelandGlaxo Wellcome Res & Dev Ltd, Greenford, Middx, EnglandDecroix, J, Cabinet Dermatol, 39 Ave Parc, B-7700 Mouscron, Belgium TI - Factors influencing pain outcome in herpes zoster: an observational study with valaciclovir AB - Aim of the study An observational study with valaciclovir was conducted to assess clinical outcome in herpes tester, especially pain and associated neurological signs and symptoms in relation to a series of demographic and disease characteristics discernible at presentation. The safety and acceptability of valaciclovir for treatment of tester was assessed in a wide variety of primary care and clinic referral settings. Methods In total, 1897 immunocompetent adults with clinically diagnosed, localized acute herpes tester were enrolled in this international, open-label study of valaciclovir. AU subjects received treatment with oral valaciclovir (1000 mg three times daily) for 7 days from entry to the study and were asked to record the presence of tester-associated pain and abnormal sensations throughout treatment and 6 months follow-up. They were seen frequently in clinic to verify subjective assessments and for evaluation of rash healing. Safety and tolerability were assessed by adverse event monitoring. Results Overall, 1191 subjects (63%) were aged greater than or equal to 50 years, and 203 (11%) had ophthalmic tester. Cessation of tester-associated pain was significantly faster in the younger age group; median times to loss of tester-associated pain were 23 days and 9 days in the greater than or equal to 50 and < 50 years age groups, respectively. Similarly, abnormal sensations resolved significantly more rapidly in the younger subjects; the median duration of abnormal sensations was 31 days in the greater than or equal to 50 year olds and 16 days in those aged < 50 years. In cases of ophthalmic tester, the rate of pain resolution was not different from those with tester in other dermatomes (median duration of pain 18 vs. 16 days). However, abnormal sensations persisted significantly longer in subjects with ophthalmic tester than in those with tester at other sites (47 vs. 22 days). In addition to advancing age, subjects suffering moderate to severe prodromal pain or acute pain during the rash phase were at significantly greater risk of zoster-associated pain and abnormal sensations persisting for longer. Subjects with concomitant neurological disorders were also more likely to develop prolonged abnormal sensations. Valaciclovir treatment was well tolerated, and adverse events were rare and generally mild. Conclusion This study confirmed the prognostic importance of advancing age and the intensity of prodromal or acute pain as risk factors for prolonged tester-associated pain and persisting abnormal sensations in the affected dermatome. Ophthalmic tester and pre-existing neurological disorders are also identified as highly significant risk factors for prolonged abnormal sensations in herpes tester MH - Austria MH - Belgium MH - United Kingdom MH - Ireland MH - Mexico|Nuevo Leon MH - Singapore MH - Sweden PB - BRUSSELS: EUROPEAN ACAD DERMATOLOGY & VENEREOLOGY RP - NOT IN FILE U3 - TC 20 U4 - Dermatology U5 - J;Article AV - English IS - 0926-9959 UR - ISI:000087328500006 L2 - herpes zoster;pain;valaciclovir;ophthalmic;age;prognostic factors;POSTHERPETIC NEURALGIA; ORAL ACYCLOVIR; NATURAL-HISTORY; THERAPY; OPHTHALMICUS; IDOXURIDINE; VARICELLA; EFFICACY; TRIAL SO - Journal of the European Academy of Dermatology and Venereology 2000 ;14(1):23-33 531 UI - 16658 AU - Deharveng L AU - Pena M AU - Caplan J AU - Costero R AD - Observ Marseille, F-13248 Marseille 4, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoDeharveng, L, Observ Marseille, 2 Pl Le Verrier, F-13248 Marseille 4, France TI - Oxygen and helium abundances in Galactic HII regions - II. Abundance gradients AB - The absolute integrated fluxes that we obtained (Paper I) for 34 H II regions, with Galactocentric distances R-G in the 6.6-17.7 kpc range, in the emission lines [O II] lambda lambda 3726 and 3729, [O III] lambda lambda 4363 and 5007, He I lambda 5876, H alpha and H beta, are analysed to derive the extinctions, the electron densities and temperatures, the ionic abundances O+/H+, O++/H+ and He+/H+ and the O/H abundances. The electron temperature has been derived from the [O III] lambda 4363/lambda 5007 ratio in six H II regions with R-G between 6.6 and 14.8 kpc. These new measurements of T-e, which are in good agreement with those from radio recombination lines, widen the R-G range for which reliable T-e measurements exist. Combining our new T-e([O III]) results with the radio values, we obtain the following temperature relationship: T-e [K] = (372 +/- 38)R-G + 4260 +/- 350. The O+/H+ and O++/H+ abundances have been obtained assuming a two-temperature H II region model. Our O/H relationship for 5 kpc < R-G < 15 kpc is 12 + log O/H = (-3.95 +/- 0.49) x 10(-2) R-G + (8.82 +/- 0.05). The slope is lower, by a factor of 2, than that previously obtained by Shaver et al. No significant flattening of this relation is obtained out to 15 kpc. At the solar Galactocentric distance, 12 + log(O/H) = 8.48, in good agreement with the O/H abundance measured in the local interstellar medium by Meyer et al., and a factor of 2 lower than the solar abundance. Our helium observations show that even a region ionized by a star earlier than O6.5 may contain a significant amount of neutral helium. We confirm the high Delta Y/Delta(O/H) value (greater than or equal to 180) measured in the Galaxy by Peimbert et al MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 72 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000084670100010 L2 - ISM : abundances;HII regions;Galaxy : abundances;RECOMBINATION-LINE-INTENSITIES; ORION-NEBULA; CHEMICAL-COMPOSITION; ELECTRON TEMPERATURES; IONIZATION STRUCTURE; ABSOLUTE MAGNITUDES; PHYSICAL CONDITIONS; PRIMORDIAL HELIUM; PLANETARY-NEBULAE; MAGELLANIC CLOUD SO - Monthly Notices of the Royal Astronomical Society 2000 ;311(2):329-345 532 UI - 15308 AU - Del Angel P AU - Dominguez JM AU - Del Angel G AU - Montoya JA AU - Lamy-Pitara E AU - Labruquere S AU - Barbier J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoUniv Poitiers, LACCO, URA CNRS, F-86022 Poitiers, FranceDel Angel, P, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Aggregation state of Pt-Au/C bimetallic catalysts prepared by surface redox reactions AB - The bimetallic catalysts Pt-Au/C (graphite) were prepared by selectively depositing Au on supported monometallic Pt/C catalysts by means of the reduction "in situ" of AuCl4-. The parent metal (Pt) was used as the reducing agent for the direct redox reactions ("DR"), while the second redox method used was the refilling method ("RE"), which consisted in adsorbing hydrogen first on the parent metal (Pt) and subsequently reducing the AuCl4- species by contact with the Pt-H interface at low temperature. The catalysts PtAu/C were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and high-resolution electron microscopy (HREM). The interaction between Pt and Au was explored at the nanometer scale by means of EDS and HREM, with the aim of characterizing the aggregation state of the metals in the Pt-Au/C systems prepared by the novel redox methods. The composition of the individual metal particles of the solids "as-prepared" (i.e., DR-A and RE-B) indicated the presence of both metals, Pt and Au. However, a thermal reduction at 300 degrees C under Ha seems to redistribute the Au phase in the DR-A solids, then the particles remain bimetallic, but in the RE-B solids the Au concentration increases substantially; Au migrates toward the small particles (i.e., 5 less than or equal to D less than or equal to 7 nm), while the bigger particles (i.e., D greater than or equal to 10 nm) show almost pure Pt. A partial Au coating of certain Pt facets is probable, which indicates that the coating mechanism is selective and could influence the catalytic properties of the bimetallic Pt-Au/C catalysts MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000089118500018 L2 - ELECTRON-MICROSCOPY; PLATINUM; ADSORPTION; COPPER; RU SO - Langmuir 2000 ;16(18):7210-7217 533 UI - 16518 AU - Del Angel PL AU - Muller-Stach S AD - UAM I, Dept Matemat, Mexico City, DF, MexicoUniv Essen Gesamthsch, Fachbereich 6, D-45117 Essen, Germanydel Angel, PL, Univ Essen Gesamthsch, Fachbereich 6, D-45117 Essen, Germany TI - On Chow motives of 3-folds AB - Let k be a field of characteristic zero. For every smooth, projective k-variety Y of dimension n which admits a connected, proper morphism f : Y --> S of relative dimension one, we construct idempotent correspondences (projectors) pi(ij) (Y) is an element of CHn(Y x Y, Q) generalizing a construction of Murre. If n = 3 and the transcendental cohomology group H-tr(2)(Y) has the property that H-tr(2)(Y, C) = f*H-tr(2)(S, C) + Im(f*H-1(S, C) x H-1(Y, C) --> H-tr(2)(Y, C)), then we can construct a projector pi(2)(Y) which lifts the second Kunneth component of the diagonal of Y. Using this we prove that many smooth projective 3-folds X over k admit a Chow-Kunneth decomposition Delta = p(0) +...+ p(6) of the diagonal in CH3(X x X, Q) MH - Germany MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000085215200006 L2 - Chow group;correspondence;motive;Albanese map;CONJECTURAL FILTRATION; ALGEBRAIC VARIETY; SURFACE SO - Transactions of the American Mathematical Society 2000 ;352(4):1623-1633 534 UI - 15129 AU - del Blanco IA AU - Rajaram S AU - Kronstad WE AU - Reynolds MP AD - N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105, USAOregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USACIMMYT, Mexico City 06600, DF, Mexicodel Blanco, IA, N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105 USA TI - Physiological performance of synthetic hexaploid wheat-derived populations AB - Wild ancestors of common wheat (Triticum aestivum L.) have been reported to have higher maximum photosynthetic rates than modern wheat cultivars. Synthetic hexaploids, obtained by crossing tetraploid wheat and Aegilops tauschii Coss., have proven useful as a source of resistance or tolerance to biotic and abiotic stresses. This study was conducted to determine whether synthetic hexaploids also could contribute genetic diversity to enhance leaf photosynthetic rate and other physiological traits. Three different populations of BC2F2:6 synthetic-derived lines were evaluated at the Agricultural Research Center for the Northwest (INIFAP) Experimental Station, near Ciudad Obregon, Sonora, Mexico. Differences in maximum photosynthetic rate were detected among genotypes. Several synthetic-derived lines showed higher photosynthetic rates than their recurrent parent. Staygreen, determined as days between senescence and physiological maturity, of most synthetic-derived lines did not differ from the recurrent parents. Maximum photosynthetic rate was negatively associated with leaf area and positively associated with stomatal and mesophyll conductances, and leaf temperature depression. Mesophyll conductance accounted for 85% of the variation in maximum photosynthetic rate. These results suggest that synthetic-derived wheat can be also a source of genetic diversity for important physiological traits such as enhanced photosynthetic rate MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000089612600009 L2 - TRITICUM-AESTIVUM; YIELD; PHOTOSYNTHESIS SO - Crop Science 2000 ;40(5):1257-1263 535 UI - 16275 AU - del Campo AFM AU - Dowson JH AU - Herbert J AU - Paykel ES AD - Univ Nacl Autonoma Mexico, Hosp Gen Mexico, Sch Med, Sleep Disorders Clin, Mexico City 06726, DF, MexicoUniv Cambridge, Dept Psychiat, Cambridge CB2 2QQ, EnglandUniv Cambridge, Dept Anat, Cambridge CB2 3DY, Englanddel Campo, AFM, Univ Nacl Autonoma Mexico, Hosp Gen Mexico, Sch Med, Sleep Disorders Clin, Dr Balmis 148,Col Doctores, Mexico City 06726, DF, Mexico TI - Diurnal variations in endocrine and psychological responses to 0.2 mg/kg naloxone administration in patients with major depressive disorder and matched controls AB - Background: There is evidence that the endogenous opioid system (EOS) is involved in the modulation of mood and neuroendocrine function. Furthermore, the possible involvement of the EOS in major depression has been postulated, although a clear role has not been established. Methods: The affective and endocrine responses to naloxone administration in seven female depressives and in seven matched controls and their diurnal variations were investigated. Subjects had an i.v. bolus of either 0.2 mg/kg naloxone or saline at two time points (09:00 or 18:00 h) and for 2 days in a single-blind: cross-over design. Results: The basal cortisol plasma levels, both in the morning and in the afternoon, showed higher values (P < 0.05) in the depressives. There was a naloxone-induced increase in the adrenocorticotrophic hormone (ACTH), cortisol, and luteinizing hormone (LH) plasma levels, plus a subjective dysphoric effect in both groups. The depressives showed a greater dysphoric effect both in the morning and afternoon (P < 0.05), and a blunted cortisol response in the afternoon (P < 0.05). There were no differences between groups or time of day in the ACTH or LH responses. Limitations: The sample size was small, but by studying each patient as their own control, plus a matched control for evert patient, softens this effect. Finding patients with a major depressive episode free of medication is difficult, and this aspect contributes to the size of the sample. Conclusions: These results suggest that opioid mechanisms may be involved in the HPA axis changes and possibly in mood changes found in depression. The discrepancy between increased sensitivity in depression to mood changes and decreased change in cortisol may indicate a ceiling effect for the latter. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology;Psychiatry U5 - J;Article AV - English IS - 0165-0327 UR - ISI:000086172600004 L2 - naloxone;depression;endocrine;mood;diurnal variations;humans;PITUITARY-ADRENAL AXIS; HIGH-DOSE NALOXONE; SENSITIVITY; VOLUNTEERS; INFUSIONS; HORMONE; MOOD SO - Journal of Affective Disorders 2000 ;57(1-3):37-47 536 UI - 16650 AU - del Castillo LF AU - Criado-Sancho M AU - Jou D AD - Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, SpainUNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoUNED, Dept Ciencias Tech Fisisoquim, E-28040 Madrid, SpainJou, D, Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, Spain TI - Nonequilibrium chemical potential and shear-induced migration of polymers in dilute solutions AB - We consider the contribution of a nonequilibrium chemical potential depending on the shear rate on shear-induced polymer migration. It is seen that this nonequilibrium contribution strongly enhances, above a threshold of polymer concentration and of shear rate, the migration of the polymer towards the regions with lower stress. This enhancement may explain why the migration rate experimentally observed is much higher than that predicted by constitutive laws where the nonequilibrium effects on the chemical potential are ignored. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000084740200032 L2 - polymer migration;nonequilibrium chemical potential;cone-and-plate;PHASE-SEPARATION; HOOKEAN DUMBBELLS; DIFFUSION TENSOR; FLOW; EQUATIONS; APPROXIMATION; RHEOLOGY; SHIFT SO - Polymer 2000 ;41(7):2633-2638 537 UI - 14923 AU - Del Rio-Portilla MA AU - Beaumont AR AD - Ctr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Ensenada 22800, Baja California, MexicoUniv Wales, Sch Ocean Sci, Bangor LL59 5EF, Gwynedd, WalesDel Rio-Portilla, MA, POB 434844, San Diego, CA 92143, USA TI - Larval growth, juvenile size and heterozygosity in laboratory reared mussels, Mytilus edulis AB - Studies with marine bivalve juveniles have shown a positive correlation between growth and allozyme multi-locus heterozygosity (MLH), and, in some cases, between larval growth and juvenile growth, but there has been little research on the relationship between allozyme heterozygosity and larval growth. Larvae of M. edulis from different mating systems (half-sib families with a single female, or a single male parent, a reciprocal cross of two males x two females and two mass matings of 13 x 13 and 8 x 17 females and males, respectively) were reared in the laboratory and selected into fast and slow growing groups when about 10-30% were undergoing metamorphosis. Offspring were reared to the juvenile stage (> 3.00 mm) and both groups of each mating were electrophoresed and genotyped at up to 12 allozyme loci. There was generally good agreement with Mendelian inheritance (half-sibs and reciprocal cross) or the Hardy-Weinberg model (mass matings). Null alleles were detected at the Odh and Lap loci but there was no evidence that null allele heterozygotes grew slower than other genotypes. Over all cohorts, juveniles from the fast growing larval group were not significantly larger, or smaller, than juveniles from the slow growing group which suggests that larval growth rate may be independent of juvenile growth rate. This observation agrees with some, but not all, earlier studies and has commercial relevance. Tests of heterozygosity and juvenile shell length indicated no association between average heterozygosity across all allozyme loci and the size of juveniles in any cohort regardless of the mating system used or their larval growth rate. The association between MLH and juvenile growth in bivalves is seldom detected in cohorts From a limited genetic background. The lack of an association between heterozygosity and size might therefore be expected in the half-sib and reciprocal cross cohorts, but not in the mass matings. The results argue against any significant association between heterozygosity and larval size in mussels. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000165200400001 L2 - allozyme;heterozygosity;larval growth;Mytilus edulis;null allele;SCALLOP PLACOPECTEN-MAGELLANICUS; MULTIPLE-LOCUS HETEROZYGOSITY; OYSTER CRASSOSTREA-VIRGINICA; ENZYME HETEROZYGOSITY; MULTILOCUS HETEROZYGOSITY; MULINIA-LATERALIS; GENETIC-VARIATION; DEFICIENCIES; POPULATIONS; SELECTION SO - Journal of Experimental Marine Biology and Ecology 2000 ;254(1):1-17 538 UI - 14786 AU - Delacy IH AU - Skovmand B AU - Huerta J AD - Univ Queensland, Sch Land & Food Sci, Brisbane, Qld 4007, AustraliaInt Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoInst Natl Invest Forestales Agr & Pecuarias, Chapingo, Texcoco, MexicoDeLacy, IH, Univ Queensland, Sch Land & Food Sci, Brisbane, Qld 4007, Australia TI - Characterization of Mexican wheat landraces using agronomically useful attributes AB - In 1992, 465 individual spikes of bread wheat were collected from 24 sites in three states of Mexico. They were examined for 15 morphological, agronomic and grain quality attributes as part of the routine regeneration process conducted by the CIMMYT Wheat Genetic Resources Program in unreplicated hill plots in a screen house. A pattern analysis (combined use of classification and ordination methods) of the data provided a good description of the accessions and the collection sites. Since economically useful attributes were used the analysis provided relevant information for both potential users and the germplasm curators. Potential users have a description of the accessions from which to choose relevant breeding material and curators can assess how well the accessions represent the diversity in the collection sites. The analysis would not have been possible if the individual spikes from collection sites were bulked as is the common practice MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000165632100003 L2 - characterization;evaluation;genetic diversity;genetic resources;pattern analysis;sampling strategy SO - Genetic Resources and Crop Evolution 2000 ;47(6):591-602 539 UI - 14816 AU - Delacy IH AU - Rajaram S AU - Cooper M AU - Fox PN AU - Basford KE AD - Univ Queensland, Sch Land & Food Sci, Brisbane, Qld 4072, AustraliaInt Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoDeLacy, IH, Univ Queensland, Sch Land & Food Sci, Brisbane, Qld 4072, Australia TI - The effect of the accumulation of disease resistance genes on the long-term association of a global sample of environments for testing spring bread wheat AB - CIMMYT (the International Maize and Wheat Improvement Center) has routinely conducted international wheat yield trials to study the adaptation of spring bread wheat. The first of these, the International Spring Wheat Yield Nursery (ISWYN). was conducted for 31 years from 1964 to 1994 inclusive (30 cycles were conducted as no nursery was distributed in 1993 because of Karnal Bunt). Recently, pattern analysis methods have been developed and a set of computer programs written, which enable retrospective analyses of such historical databases to appraise the relationships among test environments in a way that discriminates among genotypes. Such an analysis was conducted on the 30 years of yield data from ISWYN and the classification derived from these analyses was compared with an agroecological classification of spring wheat test environments derived by CIMMYT. The incidence of foliar diseases (stem rust, leaf rust, yellow rust, Septoria spa. and Fusarium spp.) was important in the distinction between the high-rainfall low-latitude (mega-environment 2) and the high-input-irrigated low-latitude (mega-environment 1) environment types. The accumulation of resistance genes for these diseases has been an objective of the CIMMYT wheat breeding program. It was hypothesized that, as the relevant resistance genes were successfully pyramided into the germplasm, the distinction between these two mega-environment types would disappear. The results of the retrospective analyses support this hypothesis MH - Australia MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000165482700021 L2 - CIMMYT;ISWYN;mega-environments;retrospective analysis;pattern analysis;CULTIVAR PERFORMANCE; SITES; VARIETY SO - Theoretical and Applied Genetics 2000 ;101(7):1164-1172 540 UI - 16044 AU - Delanghe J AU - Langlois M AU - Esquivel CA AU - De Haene H AU - De Buyzere M AD - State Univ Ghent Hosp, Dept Clin Chem 1B2, B-9000 Ghent, BelgiumUniv Juarez, Inst Invest Cient, Durango, MexicoDelanghe, J, State Univ Ghent Hosp, Dept Clin Chem 1B2, De Pintelaan 185, B-9000 Ghent, Belgium TI - Haptoglobin 1F allele frequency is high among indigenous populations in the state of Durango, Mexico AB - We studied haptoglobin polymorphism in Mexican populations with high Indian ancestry living in isolated and urban areas in the state of Durango, Analysis with respect to the HP*1F and HP*1S allelic subtypes by isoelectric focusing showed unusually high HP*1F allele frequencies among urban (0.370) and isolated Mexican Indians (0.383). Comparison with other population studies demonstrated a geographical dine of the HP*1F allele increasing in the same direction of the HP*1 allele, while HP*1S frequency does not show racial differences. Copyright (C) 2000 S. Karger AG, Basel MH - Belgium MH - Mexico|Durango PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0001-5652 UR - ISI:000086919000010 L2 - haptoglobin;phenotypes;subtypes;Mexican Indians;SUBTYPES SO - Human Heredity 2000 ;50(4):263-265 541 UI - 15043 AU - Deleze M AU - Cons-Molina F AU - Villa AR AU - Morales-Torres J AU - Gonzalez-Gonzalez JG AU - Calva JJ AU - Murillo A AU - Briceno A AU - Orozco J AU - Morales-Franco G AU - Pena-Rios H AU - Guerrero-Yeo G AU - Aguirre E AU - Elizondo J AD - Ctr Hematol & Med Interna Puebla, Clin Osteoporosis, Puebla 72530, MexicoUnidad Diagnost Osteoporosis Mexicali, Mexicali, Baja California, MexicoInst Nacl Nutr Salvador Zubiran, Unidad Epidemiol Clin, Mexico City 14000, DF, MexicoHosp Aranda Parra, Leon, Cto, MexicoCtr Evaluac Osteoporosis, Monterrey, NL, MexicoMexico Hosp, Ctr Estudio Climaterio & Osteoporosis, Mexico City, DF, MexicoCtr Osteoporosis Clin Merida, Merida, VenezuelaCtr Detecc & Manejo Osteoporosis, Guadalajara, Jalisco, MexicoDIF Estatal CREE, Durango, Dgo, MexicoCtr Diagnost Osteoporosis, Hermosillo, Sonora, MexicoUnidad Densitometria Clin San Jose, Cd Obregon, Sonora, MexicoDeleze, M, Ctr Hematol & Med Interna Puebla, Clin Osteoporosis, 8 B Sur 3710, Puebla 72530, Mexico TI - Geographic differences in bone mineral density of Mexican women AB - The aim of this study was to generate standard curves for normal spinal and femoral neck bone mineral density (BMD) in Mexican women using dual-energy Xray absorptiometry (DXA), to analyze geographic differences and to compare these with 'Hispanic' reference data to determine its applicability. This was a cross-sectional study of 4460 urban, clinically normal, Mexican women, aged 20-90 years,from 10 different cities in Mexico (5 in the north, 4 in the center and 1 in the southeast) with densitometry centers. Women with suspected medical conditions or who had used drugs affecting bone metabolism. were excluded. Lumbar spine BMD was significantly higher (1.089 +/- 0.18 g/cm(2)) in women from the northern part of Mexico, with intermediate values in the center (1.065 +/- 0.17 g/cm(2)) and lower values (1.013 +/- 0.19 g/cm(2)) in the southeast (p<0.0001). Similarly, femoral neck BMD was significantly higher in women from the north (0.895 +/- 0.14 g/cm(2)), intermediate in the center (0.864 +/- 0.14 g/cm(2)) and lower (0.844 +/- 0.14 g/cm(2)) in the southeast part of Mexico (p<0.0001). Northern Mexican women tend to be taller and heavier than women from the center and, even more, than those from the southeast of Mexico (p<0.0001). However, these differences in BMD remained significant after adjustment for weight (p<0.0001). A significant loss (p<0.0001) in BMD was observed from 40 to 69 years of age at the lumbar spine and up to the eighth decade at the femoral neck. Higher and lower lumbar spine values, as compared with the 'Hispanic' population, were observed in Mexican mestizo women from the northern and southeastern regions, respectively. In conclusion, there are geographic differences in weight and height of Mexican women, and in BMD despite adjustment for weight MH - Mexico|Baja California MH - Mexico|Guanajuato MH - Mexico|Distrito Federal MH - Mexico|Durango MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - Mexico|Puebla MH - Mexico|Sonora MH - Venezuela PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0937-941X UR - ISI:000089891300003 L2 - bone mineral density (BMD);dual-energy X-ray absorptiometry (DXA);femoral neck;Hispanic;lumbar spine;Mexican women;GENE-FREQUENCIES; HIP FRACTURE SO - Osteoporosis International 2000 ;11(7):562-569 542 UI - 15050 AU - Delgado J AU - Luis A AU - Sanchez-Soto LL AU - Klimov AB AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoDelgado, J, Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, Spain TI - Quantum dynamics of the relative phase in second-harmonic generation AB - We present a comprehensive and self-consistent theory of the relative phase between fundamental and harmonic modes in the nonlinear process of second-harmonic generation. We introduce an adequate polar decomposition of the field amplitudes that leads to a truly Hermitian relative-phase operator, whose eigenstates correctly describe the phase properties of the fields. We find the probability distribution for the relative phase and, by using a numerical diagonalization of the interaction Hamiltonian, we study its time evolution. This evolution shows quite different asymptotic behaviours for long times depending on the total number of quanta MH - Mexico|Jalisco MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000089908700007 L2 - quantum phase;second harmonic;deformed algebras;2ND-HARMONIC GENERATION; DIFFERENCE OPERATOR; STOKES PARAMETERS; CONVERSION; FIELD; MODE; DISTRIBUTIONS; FLUCTUATIONS; EVOLUTION; ALGEBRA SO - Journal of Optics B-Quantum and Semiclassical Optics 2000 ;2(1):33-40 543 UI - 16030 AU - Delibes M AU - Ferreras P AU - Blazquez MC AD - CSIC, Estac Biol Donana, Seville 41080, SpainCtr Invest Biol Noroeste, La Paz 23000, Baja California, MexicoDelibes, M, CSIC, Estac Biol Donana, Avda Ma Luisa S-N,Apdo 1056, Seville 41080, Spain TI - Why the Eurasian Otter (Lutra Lutra) leaves a pond? An observational test of some predictions on prey depletion AB - In the Donana National Park (SW Spain), Eurasian Otters (Lutra lutra) harvest temporally some scattered ponds close to the Guadalquivir marshes. By analysing 307 spraints collected during three periods of pond occupancy, we used the otters' diet to test the hypothesis that they leave these ponds when they have depleted their favourite prey (large Eels, Anguilla anguilla) and consequently are forced to eat less rewarding prey (small eels and Mosquitofish, Gambusia affinis). Results indicate that the proportion of eels decreased in the otter's diet, and that of mosquitofish increased, during the first and longest period of use of the pond by the otter, but not in two other instances of shorter occupation periods. Trophic diversity and average size of eaten eels did not change along the study. We suggest that temporal changes in habitat and trophic resources on a larger spatial scale could explain the decisions of the otter rather than a hypothetical giving-up density of the favourite prey in the studied pond MH - Mexico|Baja California MH - Spain PB - PARIS 5: SOC NATL PROTECTION NATURE ACCLIMATATION FRANCE RP - NOT IN FILE U3 - TC 6 U4 - Ecology U5 - J;Article AV - English IS - 0249-7395 UR - ISI:000086912000005 L2 - FECAL ANALYSIS; PREDATION; SELECTION; SHETLAND; SIZE; SPRAINTS; SPAIN; MINK SO - Revue D Ecologie-la Terre et la Vie 2000 ;55(1):57-65 544 UI - 16074 AU - Delicio MP AU - Coimbra JC AU - Carreno AL AD - Univ Fed Ouro Preto, Escola Minas, Dept Geol, BR-35400000 Ouro Preto, MG, BrazilUniv Fed Rio Grande Sul, Dept Paleontol & Estratig, Inst Geociencias, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande Sul, Inst Biociencias, CECLIMAR, BR-95625000 Imbe, RS, BrazilNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoDelicio, MP, Univ Fed Ouro Preto, Escola Minas, Dept Geol, BR-35400000 Ouro Preto, MG, Brazil TI - Cretaceous marine Ostracoda from the Potiguar Basin, Northeastern Brazil AB - Ostracodes from the Cretaceous Acu and Jandaira formations from the Potiguar basin, in the east of the Rio Grande do Norte State, Brazil, were studied taxonomically, biostratigraphically and paleogeographically. In spite of the scarcity and sparsity of ostracodes throughout the boreholes, a Cenomanian to at least lower Turonian Veenia glabella and a Turonian to Campanian Cytherella gambienses interval zone were defined. The first is represented by a characteristic outer neritic assemblage, and is interpreted as deposited under sluggish circulation conditions; while the assemblages of the second zone was deposited after the reinstallation of normal circulation of the bottom water. With few exceptions, the studied ostracodes have a restricted biogeographical distribution MH - Brazil MH - Mexico|Distrito Federal PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 3 U4 - Paleontology U5 - J;Article AV - English IS - 0077-7749 UR - ISI:000086714200001 SO - Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 2000 ;215(3):321-345 545 UI - 15276 AU - den Auwer C AU - Simoni E AU - Conradson SD AU - de Leon JM AU - Moisy P AU - Beres A AD - CEA Marcoule, SEMP, DRRV, DCC,Lab Chim Theor & Struct, F-30207 Bagnols Sur Ceze, FranceInst Phys Nucl Orsay, F-91494 Orsay, FranceUniv Calif Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545, USACINVESTAV, Dept Fis Aplicada, Merida, MexicoCEA Marcoule, SEMP, DRRV, DCC,Lab Chim Appl Analyt, F-30207 Bagnols Sur Ceze, FranceDen Auwer, C, CEA Marcoule, SEMP, DRRV, DCC,Lab Chim Theor & Struct, F-30207 Bagnols Sur Ceze, France TI - X-ray absorption L-III and M-V edges of hexavalent lower actinides AB - X-ray absorption spectroscopy is used to probe the electronic and structural features of the actinides. To better understand the effect of the effective charge and polyhedron on the edge structure, we discuss the L-m and M-v edges in AnO(2)(NO3)(2)(TBP)(2) (where the actinide is shortly linked to the 'yl' oxygens) and in the perovskite Ba(2)ZnAnO(6) (where the hexavalent actinide is in the cubic structure as An(6+)), An = U, Np, Pu. Using FEFF8 simulations, both features and position of the L-m and M-v edges are explained within a crystal field splitting of the orbitals picture and a multiple scattering picture. (C) 2000 Academic des sciences / Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Yucatan MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1387-1609 UR - ISI:000089280200001 L2 - XANES;uranium;neptunium;plutonium;perovskite;FINE-STRUCTURE SPECTROSCOPY; MULTIPLE-SCATTERING; ELECTRONIC-STRUCTURE; COMPLEXES; AQUO; GLASS; IONS SO - Comptes Rendus de l Academie des Sciences Serie Ii Fascicule C-Chimie 2000 ;3(5):327-333 546 UI - 16029 AU - Dendooven L AU - Murphy E AU - Powlson DS AD - AFRC, Inst Arable Crops Res, Dept Soil Sci, Harpenden AL5 2JQ, Herts, EnglandDendooven, L, Inst Politecn Nacl, CINVESTAV, Av Inst Politecn Nacl 2508, Mexico City 07000, DF, Mexico TI - Failure to simulate C and N mineralization in soil using biomass C-to-N ratios as measured by the fumigation extraction method? AB - A C and N mineralization model (DETRAN) was used to simulate C and N dynamics in an unfertilized soil (NIL plot) and a soil annually fertilized with organic (FYM plot) or inorganic fertilizer (NPK plot). The soils amended with or without rye, i.e. 500 mg C and 30 mg N kg(-1) dry soil (D.S.), were incubated for 180 d at 25 degrees C and microbial biomass C and N, CO2 production and inorganic N (NH4+, NO2-, NO3-) were monitored. The production of CO2 was greater in the NIL plot than in the NPK plot but three times lower than in the FYM plot. The soil microbial biomass C and N decreased in the FYM soil but not in the NIL and NPK plots. The N mineralization was 7.5 times greater in the FYM plot than in the NPK and NIL plots bur the application of rye had no significant effect on it. In the unamended soil, an efficiency for C of 40%, i.e. the amount of C incorporated into the microbial biomass while the rest or 60% evolved as CO2, had to be used to link the C and N dynamics in the NPK and NIL plots but the efficiency was only 26% in the FYM plot. The efficiency for C added with the rye was 45% in the NIL plot and 60% in the NPK plot but it was difficult to link C and N mineralization in the FYM plot. We conclude that the dynamics of C and N as governed by the microbial biomass C and N were different for the FYM plot compared with the NPK and NIL plots. The difference, a result of long-term organic fertiliser application, could be due to a difference in efficiency for C, a difference in the C-to-N ratio of the microbial biomass; a difference not reflected in the measured values, or/and a difference in the dynamics of N. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Soil Science U5 - J;Article AV - English IS - 0038-0717 UR - ISI:000086956900010 L2 - MICROBIAL BIOMASS; ORGANIC-MATTER; CHLOROFORM FUMIGATION; AUTOMATED PROCEDURE; BIOCIDAL TREATMENTS; NITROGEN-CYCLE; CARBON; TEMPERATURES; METABOLISM; TURNOVER SO - Soil Biology & Biochemistry 2000 ;32(5):659-668 547 UI - 14779 AU - DeRiemer K AU - Garcia MDG AU - Garduno APD AU - Osornio JS AU - Small PM AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoStanford Univ, Med Ctr, Div Infect Dis, Stanford, CA 94305, USAGarcia, MDG, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, Mexico TI - Classification of drug-resistant tuberculosis MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 3 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0140-6736 UR - ISI:000165665400050 SO - Lancet 2000 ;356(9245):1931-1932 548 UI - 15166 AU - Derome L AU - Buenerd M AU - Barrau A AU - Bouchet A AU - Menchaca-Rocha A AU - Thuillier T AD - Inst Nucl Sci, IN2P3, F-38026 Grenoble, FranceIFUNAM, Inst Fis, Mexico City, DF, MexicoDerome, L, Inst Nucl Sci, IN2P3, 53 Av Martyrs, F-38026 Grenoble, France TI - Origin of the high energy proton component below the geomagnetic cutoff in near earth orbit AB - The high flux proton component observed by AMS below the geomagnetic cutoff can be well accounted for by assuming these particles to be secondaries originating from the interaction of cosmic ray protons with the atmosphere. Simulation results are reported. (C) 2000 Published by Elsevier Science B.V MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 27 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000089439200001 L2 - NUCLEAR-REACTIONS; MAGNETIC-FIELD SO - Physics Letters B 2000 ;489(1-2):1-8 549 UI - 15709 AU - Dersch U AU - Akchurin N AU - Andreev VA AU - Atamantchouk AG AU - Aykac M AU - Balatz MY AU - Bondar NF AU - Bravar A AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dirkes G AU - Dolgolenko AG AU - Dreossi D AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Gerzon S AU - Giller I AU - Golovtsov VL AU - Goncharenko YM AU - Gottschalk E AU - Gouffon P AU - Grachov OA AU - Gulmez E AU - Kangling H AU - Iori M AU - Jun SY AU - Kamenskii AD AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konigsmann K AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Li YS AU - Li ZG AU - Luksys M AU - Lungov T AU - Magarrel D AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Masciocchi S AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - McKenna SL AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Mukhin VA AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Oleynik G AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Patrichev S AU - Penzo A AU - Petrenko SI AU - Pogodin P AU - Povh B AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rapazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Scheglov Y AU - Schiavon P AU - Semyatchkin VK AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Skutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zukanovich-Funchal R AD - Max Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Ramat Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Rome La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyBall State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, Istanbul, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaDersch, U, Max Planck Inst Kernphys, D-69117 Heidelberg, Germany TI - Total cross section measurements with pi(-), Sigma(-) and protons on nuclei and nucleons around 600 GeV/c AB - Total cross sections for Sigma(-) and pi(-) on beryllium, carbon, polyethylene and copper as well as total cross sections for protons on beryllium and carbon have been measured in a broad momentum range around 600 GeV/c. These measurements were performed with a transmission technique in the SELEX hyperon-beam experiment at Fermilab. We report on results obtained for hadron-nucleus cross sections and on results for sigma(tot)(Sigma(-)N) and sigma(tot)(pi(-)N), which were deduced from nuclear cross sections. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000088037400011 L2 - total cross sections;glauber model;hyperon reactions;INTERSECTING STORAGE-RINGS; PP ELASTIC-SCATTERING; ANTIPROTON PROTON; REAL PART; GEV-C; AMPLITUDE SO - Nuclear Physics B 2000 ;579(1-2):277-312 550 UI - 16631 AU - Desrosiers G AU - Savenkoff C AU - Olivier M AU - Stora G AU - Juniper K AU - Caron A AU - Gagne JP AU - Legendre L AU - Mulsow S AU - Grant J AU - Roy S AU - Grehan A AU - Scaps P AU - Silverberg N AU - Klein B AU - Tremblay JE AU - Therriault JC AD - Univ Quebec, Ctr Oceanog, Rimouski, PQ G5L 3A1, CanadaFisheries & Oceans Canada, Maurice Lamontagne Inst, Div Ocean Sci, Mt Joli, PQ G5H 3Z4, CanadaCtr Oceanol Marseille, Marine Endoume Stn, URA 41, F-13007 Marseille, FranceUniv Quebec, Geotop, Montreal, PQ H3C 3P8, CanadaUniv Quebec, Dept Biol Sci, Montreal, PQ H3C 3P8, CanadaUniv Laval, GIROQ, Quebec City, PQ G1K 7P4, CanadaDalhousie Univ, Dept Oceanog, Halifax, NS B3H 4J1, CanadaInst Natl Rech Sci Oceanol, Rimouski, PQ G5L 3A1, CanadaNatl Univ Ireland Univ Coll Galway, Dept Zool, MRI, Galway, IrelandUniv Sci & Technol Lille, F-59655 Villeneuve Dascq, FranceCtr Interdisciplinario Ciencias Marinas, La Paz 23096, BCS, MexicoDesrosiers, G, Univ Quebec, Ctr Oceanog, 310 Allee Ursulines, Rimouski, PQ G5L 3A1, Canada TI - Trophic structure of macrobenthos in the Gulf of St. Lawrence and on the Scotian Shelf AB - The Gulf of St, Lawrence and Scotian Shelf provide a diversity of oceanographic conditions in a continental margin setting. Climate is markedly seasonal, and bathymetry and hydrodynamic conditions cover a broad range, significantly influencing the patterns of organic matter sedimentation and, potentially, benthic community dynamics, Samples for analysis of benthic macrofauna and sediment microorganisms were collected at six stations in the Gulf of St. Lawrence (GSL) and the Scotian Shelf during winter and summer cruises, as part of the Canadian Joint Global Ocean Flux Study. Multivariate analyses indicate significant site-related trends in trophic guilds, benthic assemblages, and microbial activity, some of which are related to geomorphological characteristics (bathymetry, topography, and substratum). Macrofaunal trophic guild data show that the stations with relatively deep settling basins (Cabot Strait and Emerald Basin), dominated by surface deposit feeders, were distinct from stations with sloping bottoms (Anticosti Gyre and Anticosti Channel), where subsurface deposit feeders dominated or surface and subsurface deposit feeders were equally abundant. Deposit feeders (surface and subsurface trophic groups) made up > 60% of the benthic communities, except at the Scotian slope station where they represented 44% of the total benthic abundances. Based on the data collected in both the water column and the sediment at three deep stations in the GSL, we hypothesize that the proportion of surface and subsurface deposit feeders, and thus the nature of bioturbation activity, is related to the magnitude and pattern of organic matter supply from the euphotic zone. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Canada MH - France MH - Ireland MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Oceanography U5 - J;Review AV - English IS - 0967-0645 UR - ISI:000084933000012 L2 - NORTHEAST WATER POLYNYA; SEA BENTHIC COMMUNITY; DEEP-SEA; SPATIOTEMPORAL VARIABILITY; CONTINENTAL-SLOPE; SCATTERING LAYERS; BOTTOM CURRENTS; PARTICLE FLUXES; ORGANIC-MATTER; STANDING STOCK SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2000 ;47(3-4):663-697 551 UI - 15547 AU - Dessens JT AU - Margos G AU - Rodriguez MC AU - Sinden RE AD - Univ London Imperial Coll Sci Technol & Med, Dept Biol, London SW7 2AZ, EnglandUniv Cambridge, Microbial Immunol Grp, Ctr Vet Sci, Cambridge CB3 0ES, EnglandCtr Invest Sobre Enfermedades Infecciosas, Inst Nacl Salud Publ, Cuernavaca, Morelos, MexicoDessens, JT, Univ London Imperial Coll Sci Technol & Med, Dept Biol, Sir Alexander Fleming Bldg,Imperial Coll Rd, London SW7 2AZ, England TI - Identification of differentially regulated genes of Plasmodium by suppression subtractive hybridization AB - Plasmodium, the causative agent of malaria, has many morphologically and functionally distinct developmental stages. In the mosquito host alone, there are five transitions during the development of a gametocyte into a sporozoite. Determining which genes are expressed at the different developmental stages is vital to our understanding of the parasite. There are a growing number of techniques designed to study gene expression, including microarray. Here, Johannes Dessens, Gabrielle Margos, Maria nef Carmen Rodriguez and Robert Sinden describe a novel method: suppression subtrative hybridization (SSH) and its successful application in obtaining mosquito midgut stage-specific genes of Plasmodium MH - United Kingdom MH - Mexico|Morelos PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 17 U4 - Parasitology U5 - J;Article AV - English IS - 0169-4758 UR - ISI:000088526300013 L2 - EXPRESSED GENES; INFECTION; LIBRARIES SO - Parasitology Today 2000 ;16(8):354-356 552 UI - 15076 AU - Dewangan GC AU - Singh KP AU - Mayya YD AU - Anupama GC AD - Tata Inst Fundamental Res, Dept Astron & Astrophys, Mumbai 400005, IndiaInst Nacl Astrophys Opt & Elect, Puebla 72000, MexicoIndian Inst Astrophys, Bangalore 560034, Karnataka, IndiaDewangan, GC, Tata Inst Fundamental Res, Dept Astron & Astrophys, Mumbai 400005, India TI - Active nucleus in a post-starburst galaxy: KUG 1259+280 AB - We report the discovery of an active nucleus in a post-starburst galaxy, KUG 1259+280, based on its X-ray and optical characteristics. The X-ray source in KUG 1259+280 was detected during a search for ultrasoft sources in the ROSAT pointings. High-resolution X-ray imaging observations with ROSAT HRI show that X-ray emission from KUG 1259+280 is unresolved. X-ray emission from KUG 1259+280 is highly variable; an episode in which X-ray intensity changed by a factor similar to 2.5 within similar to 1300 s has been detected. ROSAT PSPC spectra of this galaxy are found to be well represented by a steep power law of photon index Gamma(X) similar to 4.25, and a change in the absorbing column within similar to 1 d is indicated. The rest frame intrinsic X-ray luminosity of KUG 1259+280 is found to be similar to 3.6-4.7 x 10(42) erg s(-1), similar to that of low-luminosity Seyfert galaxies. The mass of the central massive object within KUG 1259+280 is estimated to be in the range 10(5)-10(7) M.. The optical spectrum of the nuclear region of the galaxy is complex and shows Balmer absorption and collisionally excited lines of [O III] and [N II]. The presence of forbidden emission lines and the absence of Balmer emission lines in the spectrum of KUG 1259+280 could be the result of photoionization by a diluted power-law continuum modified by enhanced stellar absorption owing to a post-starburst event. Estimated Balmer line strengths free of stellar absorptions and forbidden line strengths indicate the nucleus of KUG 1259+280 to be low-ionization nuclear emission region (LINER) like in nature. However, the low-ionization forbidden line [O I] lambda 6300 usually present in LINER spectra is not detected in the spectrum of KUG 1259+280. X-ray characteristics - variability, point-like appearance, luminosity and steepness of spectrum - indicate that the nucleus in KUG 1259+280 is active and perhaps like that of narrow-line Seyfert type 1 galaxies MH - India MH - Mexico|Puebla PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000089857400037 L2 - galaxies : active;galaxies : individual : KUG 12591280;galaxies : individual : RX J1301.912746;galaxies : nuclei;X-rays : galaxies;X-RAY VARIABILITY; SPACE-TELESCOPE OBSERVATIONS; ALL-SKY SURVEY; SEYFERT-GALAXIES; GALACTIC NUCLEI; COMA-CLUSTER; H-I; CATALOG; SPECTRA; PARAMETERS SO - Monthly Notices of the Royal Astronomical Society 2000 ;318(1):309-320 553 UI - 15041 AU - DeYoung PA AU - Atallah B AU - Hughey B AU - Jolivette PL AU - Kern M AU - Peaslee GF AU - Guimaraes V AU - Kolata JJ AU - Peterson D AU - Santi P AU - White-Stevens R AU - Aguilera EF AU - Martinez-Quiroz E AU - Becchetti FD AU - Lee MY AU - Zimmerman JA AU - Hinnefeld JD AU - Capurro OA AD - Hope Coll, Dept Phys, Holland, MI 49422, USAUniv Notre Dame, Dept Phys, Notre Dame, IN 46556, USAInst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Michigan, Dept Phys, Ann Arbor, MI 48109, USAIndiana Univ, Dept Phys, South Bend, IN 46615, USAComis Nacl Energia Atom, Dept Fis, Lab TANDAR, RA-1429 Buenos Aires, DF, ArgentinaDeYoung, PA, Hope Coll, Dept Phys, Holland, MI 49422, USA TI - Angular momentum in the He-6+Bi-209 reaction deduced from isomer ratio measurements AB - The angular momentum distribution of the compound nucleus is a fundamental characteristic of the reaction dynamics and can provide insight into reactions involving neutron- or proton-rich projectiles. Specifically, following the fusion of He-6 with Bi-209 (at center-of-mass energies of 18 to 27 MeV), At-212 is formed by the evaporation of three neutrons from the compound nucleus. The decay process leaves the residual At-212 in either the ground state (J(pi) = 1(-), T-1/2 = 314 ms) or a metastable state (J(pi) = 9(-), T-1/2 = 119 ms). The ratio of the number of residual At-212m to the total number of At-212 residual nuclei is sensitive to the original momentum distribution of the compound nucleus. The measured isomer ratio is consistent with that predicted by standard models. This agreement is observed even at the lower energies where the measured three neutron evaporation cross section is greatly enhanced compared to model calculations. While the inclusion of coupling to the neutron-transfer channels improves the agreement with the observed cross-section data somewhat, the predicted isomer ratio then diverges from the measured ratio MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000089866000073 L2 - FUSION CROSS-SECTIONS; HEAVY-ION REACTIONS; SUBBARRIER FUSION; SUB-BARRIER; HE-6; NUCLEUS; FISSION; BI-209 SO - Physical Review C 2000 ;6204(4): 554 UI - 14900 AU - Dhawan V AU - Mirabel IF AU - Rodriguez LF AD - Natl Radio Astron Observ, Socorro, NM 87801, USACtr Etud Saclay, SAp, DAPNIA, CEA,DSM, F-91191 Gif Sur Yvette, FranceInst Astron & Fis Espacio, Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoDhawan, V, Natl Radio Astron Observ, Socorro, NM 87801, USA TI - Au-scale synchrotron jets and superluminal ejecta in GRS 1915+105 AB - Radio imaging of the microquasar GRS 1915+105 with the Very Long Baseline Array (VLBA) over a range of wavelengths (13, 3.6, 2.0, and 0.7 cm), in different states of the black hole binary, always resolves the nucleus as a compact jet of length similar to 10 lambda (cm),, AU. The nucleus is best imaged at the shorter wavelengths, on scales of 2.5-7 AU (0.2-0.6 mas resolution). The brightness temperature of the core is T-B greater than or equal to 10(9) K, and its properties are better fitted by a conically expanding synchrotron jet model rather than a thermal jet. The nuclear jet varies in similar to 30 minutes during minor X-ray/radio outbursts and reestablishes within similar to 18 hr of a major outburst, indicating the robustness of the X-ray/radio (or disk/jet) system to disruption. At lower resolution (80-240 AU), more extended ejecta are imaged at similar to 500 AU separation from the stationary core. Time-lapse images clearly detect the superluminal motion of the ejecta in a few hours. The measured velocity is 1.5c + 0.1c (D/12 kpc) for the approaching component and is consistent with ballistic motion of the ejecta from 500 AU outward, perhaps even since birth. The axis of the ejecta differs by less than or equal to 12 degrees clockwise from the axis of the AU-scale jet, measured in the same observation. Both axes are stable in time (+/- 5 degrees), the AU scale for 2 yr and the large scale for over 4 yr. Astrometry over 2 yr relative to an extragalactic reference locates the black hole to +/-1.5 mas, and its secular parallax due to Galactic rotation is 5.8 +/- 1.5 mas yr(-1), consistent with a distance of 12 kpc. Finally, a limit of less than or equal to 100 km s(-1) is placed on its proper motion with respect to its neighborhood. Some accreting black holes of stellar mass (e.g., Cyg X-1, 1E 1740-2942, GRS 1758-258, GX 339-4) and supermassive black holes at the center of galaxies (e.g., Sgr A*) lack evidence of large flares and discrete transient ejecta but have compact radio cores with steady, hat-spectrum "plateau" states, like GRS 1915 + 105. To the present day GRS 1915 + 105 is the only system where both AU-scale steady jets and large-scale superluminal ejections have been unambiguously observed. Our observations suggest that the unresolved flat-spectrum radio cores of accreting black holes are compact quasi-continuous synchrotron jets MH - Argentina MH - France MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 96 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165368800037 L2 - radio continuum : stars;stars : individual (GRS 1915+105);X-rays : stars;SOURCE GRS-1915+105; BLACK-HOLES; RADIO; VARIABILITY; ASTERISK; GALAXY SO - Astrophysical Journal 2000 ;543(1):373-385 555 UI - 15132 AU - Dhawan V AU - Goss WM AU - Rodriguez LF AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoDhawan, V, Natl Radio Astron Observ, Socorro, NM 87801, USA TI - Small-scale structure in galactic HI absorption toward GRS 1915+105 AB - The existence of small-scale variations in the interstellar medium, between sight lines separated by 10-100 AU, is well established from pulsar, VLBI, MERLIN, and VLA observations. The angular resolutions are in the range 10-100 mas. During an outburst of the microquasar GRS 1915+105, the proper motion of the approaching component is similar to 250 AU (23 mas) day(-1). Using the VLA to observe the H I line at 21 cm, we have measured the time-variable H I absorption along the changing line of sight during such an outburst. We detect opacity changes of Delta tau similar to 0.67 +/- 0.16 in gas at upsilon(LSR) of 55 km s(-1), near the velocity of the tangent point at 65 km s(-1), over similar to 6 days, for lines of sight similar to 1000 AU apart. Another detection at upsilon(LSR) of 5 km s(-1) has Delta tau similar to 0.24 +/- 0.06, on lines of sight similar to 40 AU (or 440 AU) apart, depending on the near (or far) distance to the absorbing gas. From the several days of spectra, 3 sigma upper limits are derived: Delta tau less than or equal to 0.5 for gas at 55 km s(-1), on scales similar to 150-900 AU; and Delta tau less than or equal to 0.25 at 5 km s(-1), on scales similar to 25-150 AU (gas at 1 kpc) or similar to 275-1650 AU (gas at 11 kpc). We thus probe the H I structure in distant Galactic material, using a Galactic background source with rapid structural changes. Our approach complements those using extragalactic sources and nearby pulsars. Our results are consistent with extrapolation of the power-law index of 0.375 for the structure function of H I opacity (equivalent to an index of 2.75 for the power spectrum of H I), as measured by others from 4 pc to 0.02 pc toward Cassiopeia A MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089650800022 L2 - ISM : atoms;ISM : clouds;radio lines : ISM;stars : individual (GRS 1915+105);INTERSTELLAR-MEDIUM; GRS-1915+105 SO - Astrophysical Journal 2000 ;540(2):863-868 556 UI - 15664 AU - di Primio R AU - Horsfield B AU - Guzman-Vega MA AD - Saga Petr ASA, N-1301 Sandvika, NorwayKFA Julich GmbH, Forschungszentrum, D-52425 Julich, GermanyInst Mexicano Petr, Mexico City 07730, DF, Mexicodi Primio, R, Norsk Hydro AS, Res Ctr, POB 7190, N-5020 Bergen, Norway TI - Determining the temperature of petroleum formation from the kinetic properties of petroleum asphaltenes AB - Knowledge of the timing and location of petroleum formation is important in assessing the extent of available reserves in hydrocarbon-forming basins. This can be predicted from the thermal history of a basin and the kinetic parameters that characterize the thermal breakdown of kerogen in source rocks. At present, the kinetic parameters of kerogen breakdown are experimentally determined using immature rock samples from basin margins(1), but questions remain about the accuracy of this approach(2), especially when significant variability is observed within individual source units(3-5). Here we show that the kinetics of hydrocarbon generation from petroleum asphaltenes can be used to determine the temperature conditions of the actual source rock at the time of expulsion of the sampled petroleum. This relationship reflects the structural similarity of asphaltenes to the parent kerogen(6,7). We expect that our approach may be used as a comparatively simple alternative method for assessing the petroleum generation characteristics of a given basin, which will allow for better estimates of the available oil resources and the risks associated with their exploration MH - Germany MH - Mexico|Distrito Federal MH - Norway PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 12 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000088221100043 L2 - PYROLYSIS-GAS CHROMATOGRAPHY; ORGANIC GEOCHEMISTRY; CRUDE OILS; MATURITY; ORIGIN; MEXICO; DISTRIBUTIONS; GENERATION; CAMPECHE; GERMANY SO - Nature 2000 ;406(6792):173-176 557 UI - 14873 AU - Diaz AI AU - Castellanos M AU - Terlevich E AU - Garcia-Vargas ML AD - Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, SpainINAOE, Puebla 72000, MexicoGrantecan SA, Tenerife 38200, SpainDiaz, AI, Univ Autonoma Madrid, Dept Fis Teor, C-XI, E-28049 Madrid, Spain TI - Chemical abundances and ionizing clusters of HII regions in the LINER galaxy NGC 4258 AB - We present long-slit observations in the optical and near-infrared of eight H II regions in the spiral galaxy NGC 4258, Six of the observed regions are located in the south-east inner spiral arms, and the other two are isolated in the northern outer arms. A detailed analysis of the physical conditions of the gas has been performed. For two of the regions, an electron temperature has been derived from the [S III] lambda 6312 Line. For the rest, an empirical calibration based on the red and near-infrared sulphur lines has been used. The oxygen abundances derived by both methods are found to be significantly lower (by a factor of 2) than previously derived by using empirical calibrations based on the optical oxygen lines. In the brightest region, 74C, the observation of a prominent feature: caused by Wolf-Rayet (WR) stars provides an excellent constraint over some properties of the ionizing clusters. In the light of the current evolutionary synthesis models, no consistent solution is found to explain at the same time both the WR feature characteristics and the emission-line spectrum of this region. In principle, the presence of WR stars could lead to large temperature fluctuations and also to a hardening of the ionizing radiation. None of these effects is found in region 74C, for which the electron temperatures found from the [S III] lambda 6312 line and the Paschen discontinuity at 8200 Angstrom are equal within the errors, and the effective temperature of the ionizing radiation is estimated at around 35 300 K. Both more observations of confirmed high-metallicity regions and a finer metallicity grid for the evolutionary synthesis models are needed in order to understand the ionizing populations of H II regions MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000165325100018 L2 - stars : Wolf-Rayet;HII regions;galaxies : individual : NGC 4258;galaxies : stellar content;galaxies : structure;H-II REGIONS; EMISSION-LINES; STAR-FORMATION; EVOLUTIONARY SEQUENCES; SPIRAL GALAXIES; STELLAR MODELS; DISK GALAXIES; NGC-4258; STARBURST; SPECTROPHOTOMETRY SO - Monthly Notices of the Royal Astronomical Society 2000 ;318(2):462-474 558 UI - 16656 AU - Diaz AI AU - Alvarez MA AU - Terlevich E AU - Terlevich R AU - Portal MS AU - Aretxaga I AD - Univ Autonoma Madrid, Dept Fis Teor, Madrid 28049, SpainINAOE, Puebla, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandINTA, LAEFF, Madrid 28080, SpainDiaz, AI, Univ Autonoma Madrid, Dept Fis Teor, C-XI,Cantoblanco, Madrid 28049, Spain TI - V, R, I and H alpha photometry of circumnuclear star-forming regions in four galaxies with different levels of nuclear activity AB - We present photometry, in the V, R and I continuum bands and in the H alpha + [N II] emission lines, for a sample of circumnuclear star-forming regions (CNSFR), located in four galaxies with different kinds of activity in their nuclei: NGC 7469 (Seyfert 1), NGC 1068 (Seyfert 2), NGC 7177 (LINER) and NGC 3310 (starburst). H alpha luminosities for the CNSFR range from 0.02 to 7 x 10(40) erg s(-1) (uncorrected for internal extinction), comparable to those observed in other galaxies, with NGC 7177 showing the lowest luminosity in average. No systematic differences in the broad-band colours are found for the CNSFR in the different galaxies, except for those in NGC 3310 which are considerably bluer. This is found to be partially because of a younger stellar population. The colours have been analysed in the light of theoretical evolutionary synthesis models. In some cases they can be reproduced by single populations with ages ranging between 7 and 300 Myr and modest values of extinction (0.5-1.5 mag). However, in many cases, this population is unable to provide the observed equivalent widths of H alpha, which require the presence of a younger population. In the cases of NGC 1068, 7177 and 7469, acceptable fits are found for a two-burst population model at solar metallicity: the younger burst, with an age between 2 and 8 Myr, provides the bulk of the ionization and the older one (8-20 Myr) is responsible for the continuum light at wavelengths longer than H beta. The age difference between both populations is around 5-7 Myr and the younger burst involves from 3 to 61 per cent of the total mass of the cluster. This would be consistent with the younger burst being originated by the supernova activity from the previous one. Models of this kind also reproduce the regions in NGC 3310, but for younger ionizing population ages (between 1 and 3 Myr) and a metallicity 0.25 times solar. In most cases an excess in the observed (R - I) colour over the model predicted one is found, which is not consistent with a normal reddening law. If this excess is attributed to the red supergiants present in the older population, this seems to imply that this population is not properly taken into account by the models. In this two-population scenario there seems to be a trend for the circumnuclear star-forming regions of NGC 3310 (starburst), NGC 1068 (Seyfert 2) and NGC 7469 and NGC 7177 (Seyfert 1 and LINER respectively) to be progressively older. Whether this implies a relation between the evolutionary state of the regions and the nuclear type of the parent galaxy remains to be explored MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000084668400009 L2 - HII regions;galaxies : active;galaxies : nuclei;galaxies : Seyfert;galaxies : starburst;SPIRAL GALAXIES; NEARBY GALAXIES; SEYFERT NUCLEUS; STANDARD STARS; STARBURST RING; FEATURES; NGC-7469; BAR; GAS; DISTRIBUTIONS SO - Monthly Notices of the Royal Astronomical Society 2000 ;311(1):120-134 559 UI - 16413 AU - Diaz C AU - Gracia H AU - Zayas ME AU - Espinoza FJ AU - Valle-Fuentes FJ AD - Autonomous Univ Baja Calif, Sch Chem Sci, San Ysidro, CA 92173, USAUniv Sonora, Ctr Phys Res, Hermosillo, Sonora, MexicoCSIC, Inst Ceram & Glass, Madrid, SpainDiaz, C, Autonomous Univ Baja Calif, Sch Chem Sci, San Ysidro, CA 92173 USA TI - Producing optical glass with geothermal waste AB - A series of SiO2. PbO . K2O glasses have been produced using a previously purified (99.4%), silicon-rich residue from the geothermal center located in the Cerro Prieto area of Baja California, Mexico MH - Mexico|Sonora MH - Spain MH - USA PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7812 UR - ISI:000085763300006 SO - American Ceramic Society Bulletin 2000 ;79(3):57-59 560 UI - 14207 AU - Diaz E AU - Barrios H AU - Guzman A AU - Corona D AU - Diaz R AU - Fuentes A AU - Jankowski CK AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Estado Mexico, Fac Quim, Toluca 50000, MexicoUniv Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, Canada TI - 2D H-1 and C-13 NMR studies of the adducts obtained by cyclostereoselective oligomerization of alpha,beta-unsaturated arylidenketones promoted by 6 amino-1,3-dimethyl uracil AB - The reaction of the 6-amino-1,3-dimethyl uracil with the arylidenketones 1-4, enabled us to obtain adducts whose structures result from nucleophilic attack and self condensation, yielding with monomeric, dimeric or trimeric derivatives obtained with moderate (40-50%) yields. The reaction was induced by the uracil derivative and the role of this reagent was that of a nucleophile and oligomerization promoter. The structures obtained in this study were mainly elucidated with 1D and 2D high resolution NMR experiments MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 2 U4 - Spectroscopy U5 - J;Article AV - English IS - 0712-4813 UR - ISI:000167168600003 L2 - TWO-DIMENSIONAL NMR; C-C; SPECTROSCOPY; BOND; DERIVATIVES; REDUCTION; KETONES SO - Spectroscopy-An International Journal 2000 ;14(4):177-194 561 UI - 15293 AU - Diaz E AU - Barrios H AU - Portilla FD AU - Guzman A AU - Aguilera JL AU - Becerril R AU - Jankowski CK AU - Reynolds WF AD - Univ Nacl Autonoma Mexico, Circuito Exterior C Univ, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Estudios Super, Dept Quim, Mexico City 04510, DF, MexicoUniv Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, CanadaUniv Toronto, Dept Chem, Toronto, ON M5S 1A1, CanadaDiaz, E, Univ Nacl Autonoma Mexico, Circuito Exterior C Univ, Inst Quim, Apartado Postal 70-213, Mexico City 04510, DF, Mexico TI - C-13 and H-1 NMR of 2,6-diaryl-1-hydroxy piperidin-4-one oximes; substituent effects on cis/trans ratio and conformational equilibria AB - The reaction of substituted diarylidene acetones with hydroxylamine hydrochloride affords isomeric N-hydroxy diaryl piperidinone oximes as main products. The structures as well as conformational equilibria of these products were established by H-1 and C-13 NMR spectroscopy and further studied by variable temperature NMR. It was found that the cis/trans ratio of 2,6-substituted piperidine derivatives depended on the position of the substituent on the aromatic ring. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000089131900017 L2 - structure;conformation and configuration;H-1 and C-13 variable temperature NMR of N-hydroxy piperidin-4-one oximes;BOND FORMING METHODOLOGY; CYCLO-ADDITION REACTIONS SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2000 ;56(11):2191-2201 562 UI - 16434 AU - Diaz F AU - Del Rio-Portilla MA AU - Sierra E AU - Aguilar M AU - Re-Araujo AD AD - CICESE, Dept Acuicultura, Ensenada, Baja California, MexicoDiaz, F, CICESE, Dept Agr, POB 43444, San Diego, CA 92143, USA TI - Preferred temperature and critical thermal maxima of red abalone Haliotis rufescens AB - 1. Red abalone, Haliotis rufescens, acclimatizated at 17 +/- 1 degrees C had a preferred temperature of 18.8 +/- 2.1 degrees C. 2. Red abalone critical thermal maxima at 50% was calculated as 27.5 degrees C 3. The optimum growth temperature was calculated as 18.4 degrees C for H. rufescens. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Biology;Zoology U5 - J;Article AV - English IS - 0306-4565 UR - ISI:000085641400009 L2 - abalone;preferred temperature;critical thermal maxima;BEHAVIORAL THERMOREGULATION; FINAL PREFERENDUM; GROWTH SO - Journal of Thermal Biology 2000 ;25(3):257-261 563 UI - 16096 AU - Diaz ME AU - Thompson BC AU - Valdez R AD - USGS, Biol Resources Div, New Mexico Cooperat Fish & Wildlife Res Unit, Las Cruces, NM 88003, USANew Mexico State Univ, Dept Fishery & Wildlife Sci, Las Cruces, NM 88003, USADiaz, ME, Varsovia 2621,Lomas Santuario, Chihuahua 31280, Mexico TI - Nesting of Yellow-footed Gulls on Isla del Carmen, Baja California Sur, Mexico AB - From February to June 1996, we observed breeding numbers, chronology nest characteristics, and productivity of Yellow-footed Gulls (Larus livens) on and near Isla del Carmen, Baja California Sur, Mexico. Of 124 active nests on Isla del Carmen, 75.8% were single or in groups of less than or equal to ten nests. Most nests observed were 1.5-10 m above high tide line on top of bare rock. Distance to the nearest neighbors' nest varied from < one m to 50 m ((x) over bar = 12.3, 9.5 SD, n = 19). Egg-laying started in late March-early April at different colonies; hatching was completed by mid-May. Productivity at hatching was comparable to published estimates for the species. We found a discrepancy between our gull counts and another reported population estimate for the island, thus confusing population estimation used for conservation planning MH - Mexico|Chihuahua MH - USA PB - WASHINGTON: WATERBIRD SOC RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0738-6028 UR - ISI:000086697200013 L2 - behavior;Larus livens;Mexico;nesting;predation;Yellow-footed Gull SO - Waterbirds 2000 ;23(1):109-113 564 UI - 16408 AU - Dikranjan D AU - Tkacenko M AD - Univ Udine, Dipartimento Matemat & Informat, I-33100 Udine, ItalyUniv Autonoma Metropolitana, Dept Matemat, Mexico City, DF, Mexico TI - Sequential completeness of quotient groups AB - We discuss various generalisations of countable compactness for topological groups that are related to completeness. The sequentially complete groups form a class closed with respect to taking direct products and closed subgroups. Surprisingly, the stronger version of sequential completeness called sequential h-completeness (all continuous homomorphic images are sequentially complete) implies pseudocompactness in the presence of good algebraic properties such as nilpotency. We also study quotients of sequentially complete groups and find several classes of sequentially q-complete groups (all quotients are sequentially complete). Finally, we show that the pseudocompact sequentially complete groups are far from being sequentially q-complete in the following sense: every pseudocompact Abelian group is a quotient of a pseudocompact Abelian sequentially complete group MH - Italy MH - Mexico|Distrito Federal PB - CANBERRA: AUSTRALIAN MATHEMATICS PUBL ASSOC INC RP - NOT IN FILE U3 - TC 9 U4 - Mathematics U5 - J;Article AV - English IS - 0004-9727 UR - ISI:000085743100013 L2 - TOPOLOGICAL-GROUPS SO - Bulletin of the Australian Mathematical Society 2000 ;61(1):129-150 565 UI - 16623 AU - Dikranjan D AU - Tkacenko M AU - Tkachuk V AD - Univ Udine, Dipartimento Matemat & Informat, I-33100 Udine, ItalyUniv Autonoma Metropolitana, Dept Matemat, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana, Dept Math, Mexico City 09340, DF, MexicoDikranjan, D, Univ Udine, Dipartimento Matemat & Informat, Via Sci 206, I-33100 Udine, Italy TI - Topological groups with thin generating sets AB - A discrete subset S of a topological group G with identity 1 is oiled suitable for G if S generates a dense subgroup of G and S boolean OR{1} is closed in G. We study various algebraic and topological conditions on a group G which imply the existence of a suitable set for G as well as the restraints imposed by the existence of such a set. The classes Y-c,Y- Y-g and Y-cg of topological groups having a closed, generating and a closed generating suitable set are considered. The problem of stability of these classes under the product, direct sum operations and taking subgroups or quotients is investigated. We show that (totally) minimal Abelian groups often have a suitable set. It is also proved that every Abelian group endowed with the finest totally bounded group topology has a closed generating suitable set. More generally, the Bohr topology of every locally compact Abelian group admits a suitable set. (C) 2000 Elsevier Science B.V. All rights reserved. MSC: 22A05; 54H11; secondary 22D05; 54A253 54D65 MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000084837100002 L2 - BOUNDED GROUP TOPOLOGY; COMPACT-GROUPS SO - Journal of Pure and Applied Algebra 2000 ;145(2):123-148 566 UI - 14676 AU - Dilraj A AU - Cutts FT AU - Bennett JV AU - de Castro JF AU - Cohen B AU - Coovadia HM AD - MRC, Ctr Epidemiol Res S Africa, ZA-4013 Congella, South AfricaUniv Natal, Dept Paediat & Child Hlth, Durban, Kwazulu Natal, South AfricaLondon Sch Hyg & Trop Med, Infect Dis Epidemiol Unit, London WC1, EnglandPubl Hlth Lab Serv, Enter & Resp Virus Lab, London WC1, EnglandEmory Univ, Rollins Sch Publ Hlth, Dept Epidemiol, Atlanta, GA 30322, USAMexican Minist Hlth, Mexico City, DF, MexicoDilraj, A, MRC, Ctr Epidemiol Res S Africa, POB 17120, ZA-4013 Congella, South Africa TI - Persistence of measles antibody two years after revaccination by aerosol or subcutaneous routes MH - United Kingdom MH - Mexico|Distrito Federal MH - South Africa MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 17 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000165854600019 L2 - measles antibody;aerosol route;revaccination;persistence;AGED CHILDREN SO - Pediatric Infectious Disease Journal 2000 ;19(12):1211-1213 567 UI - 16399 AU - Dilraj A AU - Cutts FT AU - de Castro JF AU - Wheeler JG AU - Brown D AU - Roth C AU - Coovadia HM AU - Bennett JV AD - MRC, Ctr Epidemiol Res S Africa, Durban, South AfricaLondon Sch Hyg & Trop Med, Infect Dis Epidemiol Unit, London WC1, EnglandMexican Minist Hlth, Mexico City, DF, MexicoPubl Hlth Lab Serv, Enter & Resp Virus Lab, London, EnglandUniv Natal, Dept Pediat & Child Hlth, ZA-4001 Durban, South AfricaEmory Univ, Rollins Sch Publ Hlth, Dept Epidemiol, Atlanta, GA 30322, USADilraj, A, MRC, POB 17120, ZA-4013 Congella, South Africa TI - Response to different measles vaccine strains given by aerosol and subcutaneous routes to schoolchildren: a randomised trial AB - Background More than one dose of measles vaccine is necessary for the sustained control of measles. The aerosol route is thought to be more immunogenic for booster doses than traditional subcutaneous injections, so we did a randomised comparative trial of aerosol and subcutaneous measles Vaccines in South African schoolchildren. Methods 4327 schoolchildren (aged 5-14 years), assigned by block randomisation of classrooms, received standard titre doses of either Schwarz or Edmonston-Zagreb measles Vaccines subcutaneously or by aerosol. Blood samples for antibody assay were collected before vaccination, at 1 month, and 1 year after vaccination. The main endpoints (antibody titres at 1 month and 1 year) were compared between groups. Findings 992 children had antibody titre data available for all timepoints. 14 (3.6%) of 385 children who received Edmonston-Zagreb vaccine by aerosol were seronegative 1 year after vaccination, compared with 28 (8.6%) of 326 children who received Edmonston-Zagreb subcutaneous vaccine and 39 (13.9%) of 281 children who received Schwarz subcutaneous vaccine. At 1 month, 326 (84.7%) children who received aerosol Edmonston-Zagreb vaccine bad seroconverted, compared with 257 (78.8%) who received subcutaneous Edmonston-Zagreb vaccine and 176 (62.6%) who received subcutaneous Schwarz vaccine. At 1 month, only 116 (22.7%) of 511 children in the Schwarz aerosol group had seroconverted; this aerosol Vaccine had no detectable potency after 2 min of nebulisation. There were no serious side-effects: about 5% of children in each group had a rash within 2 weeks of vaccination. Interpretation An aerosol vaccination method that uses currently available devices and a suitably stable vaccine is effective and acceptable. This form of delivery is adaptable to mass campaigns, avoids the risks associated with injections, and could help measles eradication MH - United Kingdom MH - Mexico|Distrito Federal MH - South Africa MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 60 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000085766900012 L2 - SUCCESSFUL IMMUNIZATION; ANTIBODY-RESPONSE; MATERNAL ANTIBODY; CHILDREN; INFANTS; RUBELLA; MUMPS; REVACCINATION; ELIMINATION; ADULTS SO - Lancet 2000 ;355(9206):798-803 568 UI - 16440 AU - Diouf A AU - de Lajudie P AU - Neyra M AU - Kersters K AU - Gillis M AU - Martinez-Romero E AU - Gueye M AD - IRD, ISRA, MIRCEN Ctr, Dakar, SenegalIRD, Lab Symbioses Trop & Mediterraneennes, F-34032 Montpellier 1, FranceState Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoGueye, M, IRD, ISRA, MIRCEN Ctr, BP 1386, Dakar, Senegal TI - Polyphasic characterization of rhizobia that nodulate Phaseolus vulgaris in West Africa (Senegal and Gambia) AB - Fifty-eight new isolates were obtained from root nodules of common bean (Phaseolus vulgaris) cultivated in soils originating from different agroecological areas in Senegal and Gambia (West Africa). A polyphasic approach including both phenotypic and genotypic techniques was used to study the diversity of the 58 Rhizobium isolates and to determine their taxonomic relationships with reference strains. All the techniques performed, analysis of multilocus enzyme electrophoretic patterns, SDS-PACE profiles of total cell proteins, PCR-RFLP analysis of the genes encoding 16S rRNA and of the 16S-23S RNA intergenic spacer region (ITS-PCR-RFLP), auxanographic tests using API galleries and nodulation tests lead to the consensus conclusion that the new rhizobial isolates formed two main distinct groups, I and II. belonging to Rhizobium tropici type B and Rhizobium etli, respectively. By MLEE R. etli and group II strains showed several related electrophoretic types, evidencing some extent of internal heterogeneity among them. This heterogeneity was confirmed by other techniques (ITS-PCR-RFLP, SDS-PAGE and host-plant-specificity) with the same nine distinct strains of group II showing some differences from the core of group II (54 strains) MH - Belgium MH - France MH - Mexico|Morelos MH - Senegal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 19 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000085673600020 L2 - Rhizobium;root nodules;common bean (Phaseolus vulgaris);LEGUMINOSARUM BIOVAR PHASEOLI; SP-NOV; PHYLOGENETIC-RELATIONSHIPS; GENETIC-STRUCTURE; STRAINS; ETLI; POPULATIONS; SPACER; ELECTROPHORESIS; IDENTIFICATION SO - International Journal of Systematic and Evolutionary Microbiology 2000 ;50():159-170 569 UI - 14384 AU - Dixon DA AU - Nichols JA AU - Garza J AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Chem, Iztapalapa, Mexico TI - Density functional theory: Practical applications and issues MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000166091202375 SO - Abstracts of Papers of the American Chemical Society 2000 ;220():U447-U447 570 UI - 14760 AU - Dixon T AU - Farina F AU - DeMets C AU - Suarez-Vidal F AU - Fletcher J AU - Marquez-Azua B AU - Miller M AU - Sanchez O AU - Umhoefer P AD - Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, MGG, Miami, FL 33149, USAUniv Wisconsin, Dept Geol & Geophys, Madison, WI 53706, USACICESE, Ensenada, Baja California, MexicoUniv Guadalajara, Dept Geog, Guadalajara 44430, Jalisco, MexicoCent Washington Univ, Ellensburg, WA, USAUNAM, Inst Geofis, Mexico City, DF, MexicoNo Arizona Univ, Flagstaff, AZ 86011, USADixon, T, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, MGG, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - New kinematic models for Pacific-North America motion from 3 ma to present, II: Evidence for a "Baja California shear zone" AB - We use new models for present-day Pacific-North America motion to evaluate the tectonics of offshore regions west of the Californias. Vandenburg in coastal Alta California moves at the Pacific plate velocity within uncertainties (similar to1 mm/yr) after correcting for strain accumulation on the San Andreas and San Gregorio-Hosgri faults with a model that includes a viscoelastic lower crust. Modeled and measured velocities at coastal sites in Baja California south of the Agua Blanca fault, a region that most previous models consider Pacific plate, differ by 3-8 mm/yr, with coastal sites moving slower that the Pacific plate. We interpret these discrepancies in terms of strain accumulation on known on-shore faults, combined with right lateral slip at a rate of 3-4 mm/yr on additional faults offshore peninsular Baja California in the Pacific. Offshore seismicity, offset Quaternary features along the west coast of Baja California, and a discrepancy between the magnetically determined spreading rate in the Gulf Rise and the total plate rate from a geological model provide independent evidence for a "Baja California shear zone." MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 16 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000165646700051 L2 - SOUTHERN CALIFORNIA; FAULT; PLATE; DEFORMATION; MEXICO; GPS SO - Geophysical Research Letters 2000 ;27(23):3961-3964 571 UI - 15888 AU - Djerfi K AU - Dotsenko V AU - Fozooni P AU - Rubo YG AU - Lea MJ AD - Univ London, Dept Phys, Egham, Surrey, EnglandInst Low Temp Phys, Kharkov, UkraineUNAM, Ctr Invest Energia, Morelos 62580, MexicoLea, MJ, Univ London, Dept Phys, Egham, Surrey, England TI - Non-linear transport and a non-equilibrium phase transition in 2D electrons on liquid helium AB - The magnetoconductivity sigma(B) of the two-dimensional (2D) electron solid on liquid helium is highly non-linear, as the Hall velocity passes the phase velocity of the ripplons at the reciprocal lattice vector of the crystal. Experiments are interpreted using an N-shaped I-V characteristic. In the 2D electron fluid experiments suggest a non-equilibrium phase transition occurs at higher temperatures, driven by the nonlinear I-V characteristic. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Morelos MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000087423100397 L2 - 2D electrons;liquid helium;nonequilibrium phase transition;nonlinear transport;Wigner crystal;NONLINEAR CONDUCTIVITY; POINT SO - Physica B 2000 ;284():1918-1919 572 UI - 15303 AU - Do-Quang Z AU - Ramirez CC AU - Roustan M AD - CIRSEE Lyonnaise Eaux, F-78230 Le Pecq, FranceInst Natl Sci Appl, Dept Genie Proc Ind, LIPE, EA833, F-31077 Toulouse, FranceUniv Autonoma Metropolitana Azcapotzalco, Mexico City 02200, DF, MexicoDo-Quang, Z, CIRSEE Lyonnaise Eaux, 38 Rue President Wilson, F-78230 Le Pecq, France TI - Influence of geometrical characteristics and operating conditions on the effectiveness of ozone contacting in fine-bubbles conventional diffusion reactors AB - Ozone contactor hydrodynamics are strongly dependent on the geometry and the operating conditions of the system. In this paper results obtained on a pilot scale reactor showing the relationship between the geometrical characteristics of an ozonation reactor and its hydrodynamic behavior are presented. The validity of the proposed models has been checked on several full-scale reactors for which data were available in the literature MH - France MH - Mexico|Distrito Federal PB - BOCA RATON: LEWIS PUBLISHERS RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0191-9512 UR - ISI:000089169600003 L2 - ozone;ozone contacting;fine bubble contactors;modeling SO - Ozone-Science & Engineering 2000 ;22(4):369-378 573 UI - 16193 AU - Dodelson S AU - Gaztanaga E AD - Fermi Natl Accelerator Lab, NASA, Batavia, IL 60510, USAUniv Chicago, Dept Astron & Astrophys, Chicago, IL 60637, USACSIC, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, SpainINAOE, Astrofis, Puebla 7200, MexicoDodelson, S, Fermi Natl Accelerator Lab, NASA, POB 500, Batavia, IL 60510 USA TI - Inverting the angular correlation function AB - The two point angular correlation function is an excellent measure of structure in the Universe. To extract from it the three-dimensional power spectrum, one must invert Limber's equation. Here we perform this inversion using a Bayesian prior constraining the smoothness of the power spectrum. Among other virtues, this technique allows for the possibility that the estimates of the angular correlation function are correlated from bin to bin. The outputs of this technique are estimators for the binned power spectrum and a full covariance matrix. Angular correlations mix small and large scales but after the inversion, small-scale data can be trivially eliminated, thereby allowing for realistic constraints on theories of large-scale structure. We analyse the automated plate measurement (APM) catalogue as an example, comparing our results with previous results. As a by-product of these tests, we find - in rough agreement with previous work - that APM places stringent constraints on cold dark matter inspired models, with the shape parameter constrained to be 0.25 +/- 0.04 (using data with wavenumber k less than or equal to 0.1 h Mpc(-1)). This range of allowed values uses the full power spectrum covariance matrix, but assumes negligible covariance in the off-diagonal angular correlation error matrix, which is estimated with a large angular resolution of 0.5 degrees (in the range 0.5 degrees and 20 degrees) MH - USA MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000086388500013 L2 - methods : numerical;large-scale structure of Universe;APM GALAXY SURVEY; POWER SPECTRUM SO - Monthly Notices of the Royal Astronomical Society 2000 ;312(4):774-780 574 UI - 16530 AU - Doffinger R AU - Jouanguy E AU - Dupuis S AU - Fondaneche MC AU - Stephan JL AU - Emile JF AU - Lamhamedi-Cherradi S AU - Altare F AU - Pallier A AU - Barcenas-Morales G AU - Meinl E AU - Krause C AU - Pestka S AU - Schreiber RD AU - Novelli F AU - Casanova JL AD - Hop Necker Enfants Malad, INSERM, U429, F-75015 Paris, FranceHop Necker Enfants Malad, Unite Immunol & Hematol Pediat, F-75015 Paris, FranceHop Univ St Etienne, Serv Pediat, St Etienne, FranceHop Paul Brousse, Serv Anat Pathol, Villejuif, FranceUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Immunol Lab, Mexico City 04510, DF, MexicoUniv Erlangen Nurnberg, Inst Klin & Mol Virol, D-8520 Erlangen, GermanyUniv Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Mol Genet & Microbiol, Piscataway, NJ 08854, USAWashington Univ, Dept Pathol, St Louis, MO 63130, USAUniv Turin, Dipartimento Sci Clin & Biol, Orbassano, ItalyCasanova, JL, Hop Necker Enfants Malad, INSERM, U429, 149 Rue Sevres, F-75015 Paris, France TI - Partial interferon-gamma receptor signaling chain deficiency in a patient with bacille Calmette-Guerin and Mycobacterium abscessus infection AB - Complete deficiency of either of the two human interferon (IFN)-gamma receptor components, the ligand-binding IFN-gamma R1 chain and the signaling IFN-gamma R2 chain, is invariably associated with early-onset infection caused by bacille Calmeete-Guerin vaccines and/or environmental nontuberculous mycobacteria, poor granuloma formation, and a fatal outcome in childhood, Partial IFN-gamma R1 deficiency is associated with a milder histopathologic and clinical phenotype, Cells from a 20-year-old healthy person with a history of curable infections due to bacille Calmette-Guerin and Mycobacterium abscessus and mature granulomas in childhood were investigated, There was a homozygous nucleotide substitution in IFNGR2, causing an amino acid substitution in the extracellular region of the encoded receptor, Cell surface IFN-gamma R2 were detected by flow cytometry, Cellular responses to IFN-gamma were impaired but not abolished, Transfection with the wild-type IFNGR2 gene restored full responsiveness to IFN-gamma, This is the first demonstration of partial IFN-gamma R2 deficiency in humans MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 81 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000085229300051 L2 - IFN-GAMMA; CHILD; SUSCEPTIBILITY; MUTATION; ALPHA; GENE SO - Journal of Infectious Diseases 2000 ;181(1):379-384 575 UI - 14354 AU - Donahoe JW AU - Burgos JE AD - Univ Massachusetts, Dept Psychol, Amherst, MA 01003, USAUniv Guadalajara, Ctr Estud & Invest Comportamiento, Zapopan 45030, Jalisco, MexicoDonahoe, JW, Univ Massachusetts, Dept Psychol, Amherst, MA 01003, USA TI - Behavior analysis and revaluation AB - Revaluation refers to phenomena in which the strength of an operant is altered by reinforcer-related manipulations that take place outside the conditioning situation in which the operant was selected. As an example, if lever pressing is acquired using food as a reinforcer and food is later paired with an-aversive stimulus, the frequency of lever pressing decreases when subsequently tested. Associationist psychology infers from such findings that conditioning produces a response-outcome (i.e., reinforcer) association and that the operant decreased in strength because pairing the reinforcer with the aversive stimulus changed the value of the outcome. Here, we present an approach to the interpretation of these and related findings that employs neural network simulations grounded in the experimental analysis of behavior and neuroscience. In so doing, we address some general issues regarding the relations among behavior analysis, neuroscience, and associationism MH - Mexico|Jalisco MH - USA PB - BLOOMINGTON: SOC EXP ANALYSIS BEHAVIOR INC RP - NOT IN FILE U3 - TC 8 U4 - Psychology, Biological;Behavioral Sciences;Psychology, Experimental U5 - J;Review AV - English IS - 0022-5002 UR - ISI:000166844300005 L2 - associationism;devaluation;neural network;respondent feedback;revaluation;simulation;CONDITIONED TASTE-AVERSION; REINFORCER DEVALUATION; SYNAPTIC TRANSMISSION; ORBITOFRONTAL CORTEX; AMYGDALA; ASSOCIATIONS; NUCLEUS; MEMORY; RAT; REPRESENTATIONS SO - Journal of the Experimental Analysis of Behavior 2000 ;74(3):331-346 576 UI - 14837 AU - Donnelly P AU - Rodrigues ER AD - Univ Oxford, Dept Stat, Oxford OX1 3TG, EnglandUniv Nacl Autonoma Mexico, Math Inst, Area Invest Cientifica, Mexico City 04510, DF, MexicoDonnelly, P, Univ Oxford, Dept Stat, 1 S Parks Rd, Oxford OX1 3TG, England TI - Convergence to stationarity in the Moran model AB - Consider a population of fixed size consisting of N haploid individuals. Assume that this population evolves according to the two-allele neutral Moran model in mathematical genetics. Denote the two alleles by A(1) and A(2). Allow mutation from one type to another and let 0 < < 1 be the sum of mutation probabilities. All the information about the population is recorded by the Markov chain X = (X(t)(t0) which counts the number of individuals of type At. In this paper we study the time taken for the population to 'reach' stationarity tin the sense of separation and total, variation distances) when initially all individuals are of one type. We show that after t* = N gamma (-1) log N + c N the separation distance between the law of X(t*) and its stationary distribution converges to 1 - exp(-gammae(-gamma c)) as N --> infinity. For the total variation distance an asymptotic upper bound is obtained. The results depend on a particular duality, and couplings, between X and a genealogical process known as the lines of descent process MH - United Kingdom MH - Mexico|Distrito Federal PB - SHEFFIELD: APPLIED PROBABILITY TRUST RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0021-9002 UR - ISI:000165452900009 L2 - rate of convergence to stationarity;cut-off phenomenon;coupling;genealogical processes;LAPLACE DIFFUSION-MODEL; POPULATION-GENETICS; MARKOV-CHAINS; DESCENT; INEQUALITIES; COALESCENT; TIMES; LINES SO - Journal of Applied Probability 2000 ;37(3):705-717 577 UI - 15249 AU - Dorso CO AU - Lopez JA AU - Medellin R AD - Univ Buenos Aires, Dept Fis, Buenos Aires, DF, ArgentinaUniv Texas, Dept Phys, El Paso, TX 79968, USAUniv Autonoma Cd Juarez, Dept Ciencias Basicas, Ciudad Juarez, MexicoDorso, CO, Univ Buenos Aires, Dept Fis, Buenos Aires, DF, Argentina TI - Power law in nuclear fragmentation AB - The disassembly of nuclei in heavy-ion collisions could be the result of a liquid-gas phase transition. As critical phenomena in finite systems are not well understood we investigate the role of the mass yield as a possible signature of this effect. We do this by studying the rupture of excited finite systems using molecular dynamics experiments. In particular, we explore the applicability of the drop-size power law for different system densities and temperatures MH - Argentina MH - Mexico|Chihuahua MH - USA PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000089368500005 L2 - multifragment emission;correlations;CRITICAL-BEHAVIOR; COLLISIONS SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2000 ;11(3-4):279-284 578 UI - 15542 AU - Downs TJ AU - Mazari-Hiriart M AU - Dominguez-Mora R AU - Suffet IH AD - Univ Calif Los Angeles, Sch Publ Hlth, Environm Sci & Engn Program, Los Angeles, CA 90095, USANatl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoDowns, TJ, 11 Ledborough Lane, Beaconsfield HP9 2PZ, Bucks, England TI - Sustainability of least cost policies for meeting Mexico City's future water demand AB - Meeting future water demand without degrading ecosystems is one important indicator of sustainable development. Using simulations, we showed that compared to existing policy, more sustainable water supply options are similar or cheaper in cost. We probabilistically forecasted the Mexico City metropolitan zone population for the year 2015 to be 23.5 million and total required water supply to be 106 m(3) s(-1). We optimized existing and potential supply sources from aquifers, surface water, treatment/reuse, and efficiency/demand management by cost to meet future supply needs; the applied source supply limits determined the degree of sustainability. In two scenarios to supply 106 m(3) s(-1) the business-as-usual scenario (zero sustainability) had an average relative unit cost of 1.133; while for the most sustainable scenario (it includes reducing potential supply basins' exploitation limits by 50%), the value was 1.121. One extreme scenario to supply the forecast's 95% confidence value (124 m(3) s(-1)) showed little unit cost change (1.106). The simulation shows sustainable policies can be cost-effective MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Limnology;Water Resources U5 - J;Article AV - English IS - 0043-1397 UR - ISI:000088554500027 L2 - ECOLOGICAL RESEARCH; IRRIGATION SO - Water Resources Research 2000 ;36(8):2321-2339 579 UI - 16579 AU - Downs TJ AU - Cifuentes E AU - Ruth E AU - Suffet I AD - Univ Calif Los Angeles, Environm Sci & Engn Program, Los Angeles, CA, USAInst Nacl Salud Publ, Dept Environm Sci, Cuernavaca, Morelos, MexicoUniv Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA, USADowns, TJ, Privada Laurel MZ56 LT1B, Tlalpan 14410, DF, Mexico TI - Effectiveness of natural treatment in a wastewater irrigation district of the Mexico City region: A synoptic field survey AB - Untreated wastewater from Mexico City has been used for decades to irrigate the Mezquital Valley, Hidalgo, Mexico. A synoptic survey of the natural treatment systems was carried out using thr: criteria of 24 trace metals, 67 target base/neutral/acid (BNA) semivolatile organic compounds, nontarget BNA semivolatile organics, nitrate, 23 chlorinated pesticides, and a 20 congener polychlorinated biphenyl (PCB) suite. Data suggest the irrigation region is acting as a huge open-system slow sand filter, the main reservoir as a large waste stabilization lagoon, and the canals as extremely long, narrow stabilization channels. The BNA levels in surface water (SW) after reservoir retention were much lower than before it, while levels in groundwater (GW) were significantly lower than SW. All GW nitrate levels exceeded drinking water standards and were greater than those in SW. Metal levels in GW were below drinking water standards, and SW levels exceeded them for only a few metals. Low to moderate levels of organochlorine pesticides and PCBs were found MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ALEXANDRIA: WATER ENVIRONMENT FEDERATION RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Environmental;Environmental Sciences;Limnology;Water Resources U5 - J;Article AV - English IS - 1061-4303 UR - ISI:000085059100002 L2 - infiltration;retention;treatment;wastewater irrigation;Mexico;WATER SO - Water Environment Research 2000 ;72(1):4-21 580 UI - 15639 AU - Draxler P AU - De la Pena JP AD - Univ Bielefeld, Fak Math, D-4800 Bielefeld, GermanyUNAM, Inst Matemat, Mexico City, DF, MexicoDraxler, P, Univ Bielefeld, Fak Math, D-4800 Bielefeld, Germany TI - Tree algebras with non-negative Tits form MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000088144800032 L2 - REPRESENTATION TYPE; QUADRATIC-FORMS; WILD ALGEBRAS; TAME; FUNCTORS SO - Communications in Algebra 2000 ;28(8):3993-4012 581 UI - 15878 AU - Drenkard C AU - arcon-Segovia D AD - Inst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Nacl Cordoba, Fac Ciencias Med, Dept Rheumatol, Unit Internal Med, RA-5000 Cordoba, ArgentinaAlarcon-Segovia, D, Inst Nacl Nutr Salvador Zubiran, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - The new prognosis of systemic lupus erythematosus: Treatment-free remission and decreased mortality and morbidity MH - Argentina MH - Mexico|Distrito Federal PB - RAMAT GAN: ISRAEL MEDICAL ASSOC JOURNAL RP - NOT IN FILE U3 - TC 2 U4 - Medicine, General & Internal U5 - J;Review AV - English IS - 1565-1088 UR - ISI:000087569200012 L2 - systemic lupus erythematosus;antiphospholipid syndrome;disease remission;prognosis;mortality;DISEASE-ACTIVITY; SINGLE-CENTER; HEALTH-STATUS; RISK-FACTORS; SURVIVAL; CYCLOPHOSPHAMIDE; NEPHRITIS; VARIABLES; DAMAGE; COHORT SO - Israel Medical Association Journal 2000 ;2(5):382-387 582 UI - 15362 AU - Drost JB AU - Scaringe WA AU - Jaloma-Cruz AR AU - Li XM AU - Ossa DF AU - Kasper CK AU - Sommer SS AD - City Hope Natl Med Ctr, Dept Mol Genet, Duarte, CA 91010, USAIMSS, Ctr Invest Biomed Occidente, Div Genet, Guadalajara, Jalisco, MexicoIMSS, Ctr Invest Biomed Occidente, Div Mol Med, Guadalajara, Jalisco, MexicoPontificia Univ Javeriana, Bogota, ColombiaOrthopaed Hosp, Los Angeles, CA, USASommer, SS, City Hope Natl Med Ctr, Dept Mol Genet, 1500 E Duarte Rd, Duarte, CA 91010 USA TI - Novel hotspot detector software reveals a non-CpG hotspot of germline mutation in the factor IX gene (F9) in Latin Americans AB - Two base substitutions at each of two nucleotides in the factor IX gene (F9), but not part of CpG dinucleotides, were recently reported in a small population sample collected in Mexico, a significant observation of recurrent sites ("hotspots") of mutation (P=0.00005). When these new data were combined with previously collected mutation data into two progressively larger and inclusive Latin American samples, additional mutations were observed at one recurrent site, nucleotide 17747, and an additional recurrent nucleotide was observed such that the recurrent nucleotides in these larger samples were also significant (P=0.0003 and 0.0003). In contrast, in three non-Latin American control samples, there was at most only one nucleotide that recurred only once, most likely a chance recurrence (P greater than or equal to 0.5). When the significance of substitutions was analyzed at each recurrent nucleotide individually, nucleotide 17747 was shown to be a significant recurrent nucleotide by itself in all the Latin American population samples (P less than or equal to 0.02). Furthermore, a standard statistical comparison of mutation frequencies in the previously collected data alone confirmed that the frequency of mutation at nucleotide 17747 is significantly higher in Latin Americans than in all other populations combined (P=0.01). Thus, nucleotide 17747 is a germline mutation hotspot in F9 specific to Latin American populations. This may be the first evidence for population-specific effects on germline mutation that causes human genetic disease. The significance of the observed recurrent sites was analyzed using new software called Hotspot Detector which is capable of detecting significant recurrent sites in small samples, extending the sensitivity of F9 as a human germline mutagen test. Hotspot Detector uses a Monte-Carlo simulation method that was validated by comparing its results with those from an exact probability formula derived from statistical theory. Hum Mutat 16:203-210, 2000. (C) 2000 Wiley-Liss, Inc MH - USA MH - Colombia MH - Mexico|Jalisco PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1059-7794 UR - ISI:000089065900003 L2 - factor IX;F9;mutation analysis;mutation hotspots;mutation spectrum;RANDOM NUMBER GENERATORS; HEMOPHILIA-B; HEPATOCELLULAR-CARCINOMA; P53 GENE; PATTERN; DNA; TRANSVERSIONS; DINUCLEOTIDES; POLYMORPHISM; DELETIONS SO - Human Mutation 2000 ;16(3):203-210 583 UI - 15095 AU - Drown PM AU - Torres N AU - Tovar AR AU - Davoodi J AU - Hutson SM AD - Wake Forest Univ, Bowman Gray Sch Med, Dept Biochem, Winston Salem, NC 27157, USAInst Nacl Nutr, Dept Fisiol Nutr, Tlalpan, MexicoChildrens Hosp Eastern Ontario, Inst Res, Ottawa, ON, CanadaDrown, PM, Wake Forest Univ, Bowman Gray Sch Med, Dept Biochem, Med Ctr Blvd, Winston Salem, NC 27157 USA TI - Use of sulfhydryl reagents to investigate branched chain alpha-keto acid transport in mitochondria AB - The goal of this paper was to determine the contribution of the mitochondrial branched chain aminotransferase (BCATm) to branched chain alpha-keto acid transport within rat heart mitochondria. Isolated heart mitochondria were treated with sulfhydryl reagents of varying permeability, and the data suggest that essential cysteine residues in BCATm are accessible from the cytosolic face of the inner membrane. Treatment with 15 nmol/mg N-ethylmaleimide (NEM) inhibited initial rates of alpha-ketoisocaproate (KIC) uptake in reconstituted mitochondrial detergent extracts by 70% and in the intact organelle by 50%. KIC protected against inhibition suggesting that NEM labeled a cysteine residue that is inaccessible when substrate is bound to the enzyme. Additionally, the apparent mitochondrial equilibrium KIC concentration was decreased 50-60% after NEM labeling, and this difference could not be attributed to effects of NEM on matrix pH or KIC oxidation. In fact, NEM was a better inhibitor of KIC oxidation than rotenone. Measuring matrix aspartate and glutamate levels revealed that the effects of NEM on the steady-state KIC concentration resulted from inhibition of BCATm catalyzed transamination of KIC with matrix glutamate to form leucine. Furthermore, circular dichroism spectra of recombinant human BCATm with liposomes showed that the commercial lipids used in the reconstituted transport assay contain BCAT amino acid substrates. Thus BCATm is distinct from the branched chain alpha-keto acid carrier but may interact with the inner mitochondrial membrane, and it is necessary to inhibit or remove transaminase activity in both intact and reconstituted systems prior to quantifying transport of alpha-keto acids which are transaminase substrates. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0005-2736 UR - ISI:000089816200028 L2 - mitochondria;transport;transamination;branched chain alpha-keto acid;RAT-LIVER MITOCHONDRIA; ADIPOSE-TISSUE MITOCHONDRIA; FUNCTIONAL RECONSTITUTION; BACTERIAL EXPRESSION; UNCOUPLING PROTEIN; ASPARTATE-AMINOTRANSFERASE; DICARBOXYLATE TRANSPORTER; SACCHAROMYCES-CEREVISIAE; BOVINE MITOCHONDRIA; HEART MITOCHONDRIA SO - Biochimica et Biophysica Acta-Biomembranes 2000 ;1468(1-2):273-284 584 UI - 15962 AU - Duarte-Vazquez MA AU - Garcia-Almendarez B AU - Regalado C AU - Whitaker JR AD - Univ Autonoma Queretaro, Fac Quim, PROPAC, Dept Invest & Posgrad Alimentos, Queretaro 76010, MexicoUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USARegalado, C, Univ Autonoma Queretaro, Fac Quim, PROPAC, Dept Invest & Posgrad Alimentos, CU Cerro Campanas, Queretaro 76010, Mexico TI - Purification and partial characterization of three turnip (Brassica napus L. var. esculenta DC) peroxidases AB - Three turnip peroxidases (factions C1, C2, and C3) were partially purified and characterized, to permit study of their feasibility for use in clinical and enzyme immunoassays. These fractions represented 20% of the initial activity, and fractions C1 and C2 were purified to homogeneity. The optimum pH was between 5.0 and 5.5, while optimum temperature ranged from 40 to 55 degrees C. The ABTS K-m values for the two acidic fractions (C2 and C3) were 0.70 and 0.42 mM, respectively; about 5 times lower than that reported for the acidic commercial horseradish peroxidase (HRP). Fraction C3 had 4 times higher K-m value than commercial cationic HRP. The molecular weights determined by SDS-PAGE ranged from 39.2 to 42.5 kDa. Activation energies for inactivation were 113 (C1), 130 (C2), and 172 kJ/mol (C3) which are higher or comparable to other peroxidase isoenzymes reported. Fractions C1 and C3 represent an alternative source of peroxidase because of their higher purification yield and specific activity, when compared to fraction C2 MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000087116000025 L2 - peroxidase isoenzymes;turnip;protein purification;Brassica napus L.;THERMAL INACTIVATION; HORSERADISH-PEROXIDASE; HYDROGEN-PEROXIDE; GREEN ASPARAGUS; HEAT-RESISTANT; ISOENZYME; ISOZYMES; CHROMATOGRAPHY; CAULIFLOWER; PROTEINS SO - Journal of Agricultural and Food Chemistry 2000 ;48(5):1574-1579 585 UI - 14623 AU - Dubrovsky JG AU - Doerner PW AU - Colon-Carmona A AU - Rost TL AD - Ctr Invest Biol Noroeste, CIBNOR, La Paz 23090, Baja Calif Sur, MexicoUniv Calif Davis, Div Biol Sci, Plant Biol Sect, Davis, CA 95616, USASalk Inst Biol Studies, Plant Biol Lab, San Diego, CA 92186, USADubrovsky, JG, Ctr Invest Biol Noroeste, CIBNOR, 195, La Paz 23090, Baja Calif Sur, Mexico TI - Pericycle cell proliferation and lateral root initiation in arabidopsis AB - In contrast with other cells generated by the root apical meristem in Arabidopsis, pericycle cells adjacent to the protoxylem poles of the vascular cylinder continue to cycle without interruption during passage through the elongation and differentiation zones. However, only some of the dividing pericycle cells are committed to the asymmetric, formative divisions that give rise to lateral root primordia (LRPs). This was demonstrated by direct observation and mapping of mitotic figures, cell-length measurements, and the histochemical analysis of a cyclin-GUS fusion protein in pericycle cells. The estimated duration of a pericycle cell cycle in the root apical meristem was similar to the interval between cell displacement from the meristem and the initiation of LRP formation. Developmentally controlled LRP initiation occurs early, 3 to 8 mm from the root tip. Thus the first growth control point in lateral root formation is defined by the initiation of primordia in stochastic patterns by cells passing through the elongation and young differentiation zones, up to where lateral roots begin to emerge from the primary root. Therefore, the first growth control point is not restricted to a narrow developmental window. We propose that late LRP initiation is developmentally unrelated to the root apical meristem and is operated by a second growth control point that can be activated by environmental cues. The observation that pericycle cells divide and lateral root primordia form without intervening mitotic quiescence suggests that lateral organ formation in roots and shoots might not be as fundamentally different as previously thought MH - Mexico|Baja California Sur MH - USA PB - ROCKVILLE: AMER SOC PLANT PHYSIOLOGISTS RP - NOT IN FILE U3 - TC 53 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000165982500029 L2 - POPULATION KINETICS; APICAL MERISTEM; SEEDLING ROOTS; DIVISION; GROWTH; THALIANA; EXPRESSION; ORGANIZATION; PATTERN; CYCLIN SO - Plant Physiology 2000 ;124(4):1648-1657 586 UI - 15133 AU - Duc PA AU - Brinks E AU - Springel V AU - Pichardo B AU - Weilbacher P AU - Mirabel IF AD - CNRS URA 2052, F-91191 Gif Sur Yvette, FranceCEA Saclay, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandDept Astron, Guanajuato 36000, MexicoMax Planck Inst Astrophys, D-85740 Garching, GermanyHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUNAM, Inst Astron, Mexico City, DF, MexicoCEA Saclay, DSM, DAPNIA, Serv Astrophys, D-37083 Gottingen, GermanyCEA Saclay, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceIAFE, RA-1948 Buenos Aires, DF, ArgentinaDuc, PA, CNRS URA 2052, F-91191 Gif Sur Yvette, France TI - Formation of a tidal dwarf galaxy in the interacting system Arp 245 (NGC 2992/93) AB - Among the various phenomena observed in interacting galaxies is the ejection due to tidal forces of stellar and gaseous material into the intergalactic medium and its subsequent rearranging which can lead to the formation of self-gravitating tidal dwarf galaxies (TDGs). We investigate this process with a detailed multiwavelength study of the interacting system Arp 245 and a numerical model of the collision computed with a Tree-SPH code. Our observations consist of optical/near-infrared broadband imaging, Ha! imaging, optical spectroscopy, H I VLA cartography and CO line mapping. The system, composed of the two spiral galaxies NGC 2992 and NGC 2993, is observed at an early stage of the interaction, about 100 Myr after perigalacticon, though at a time when tidal tails have already developed. The VLA observations disclose a third partner to the interaction: an edge-on, flat galaxy, FGC 0938, which looks strikingly undisturbed and might just be falling toward the NGC 2992/93 system. Our H I map shows prominent counterparts to the optical tails. Whereas the stellar and gaseous components of the plume that originates from NGC 2992 match, the stellar and H I tails emanating from NGC 2993 have a different morphology. In particular, the H I forms a ring, a feature that has been successfully reproduced by our numerical simulations. The H I emission in the system as a whole peaks at the tip of the NGC 2992 tail where a gas reservoir of about 10(9) M-circle dot, about 60% of the H I toward NGC 2992, coincides with a star-forming optical condensation, A245N. The latter tidal object exhibits properties ranging between those of dwarf irregular galaxies (structural parameters, gas content, star formation rate) and those of spiral disks (metallicity, star formation efficiency, stellar population). Although it is likely, based on our analysis of the H I and model data cube, that A245N might become an independent dwarf galaxy, the dynamical evidence is still open to debate. Prompted by the questions raised for this particular object, we discuss some issues related to the definition and identification of TDGs and highlight some specific conditions which seem required to form them. Finally, we outline what is needed in terms of future numerical simulations in order to further our understanding of these objects MH - Argentina MH - United Kingdom MH - France MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 64 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000089670300007 L2 - galaxies : individual (Arp 245, NGC 2992, NGC 2993, FGC 0938);galaxies : interactions;methods : numerical;H-II REGIONS; STAR-FORMATION; SEYFERT-GALAXIES; IRREGULAR GALAXIES; CHEMICAL ABUNDANCES; OPTICAL STRUCTURE; SPIRAL GALAXIES; ACTIVE GALAXIES; DISK GALAXIES; LINE RATIOS SO - Astronomical Journal 2000 ;120(3):1238-1264 587 UI - 15489 AU - Duda Y AU - Garcia I AU - Trokhymchuk A AU - Henderson D AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Lab Visualizac, DGSCA, Mexico City 04510, DF, MexicoBrigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USAHenderson, D, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - The correlations in a star molecule fluid. Integral equation theory and Monte Carlo study AB - The structure of a starlike molecule (SLM) fluid with four arms of different length is studied by applying the associative Percus-Yevick integral equation (IE) theory and canonical Monte Carlo (MC) simulations. In the IE study the SLM fluid is modelled by a fluid of hard spheres with four associative sites on each sphere while the MC has been performed for a freely-joined tangent hard sphere fluid. The total radial distribution functions have been calculated in both approaches for different volume fraction regimes and different arm lengths. It is shown that the associative IE theory predicts the structure of SLM fluid best for relatively long arms and at high densities. Additionally, the dependence of the SLM centre-centre correlations on the functionality and fluid particle density has been analysed using the MC results MH - Mexico|Distrito Federal MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000088668400002 L2 - COMPUTER-SIMULATION; ASSOCIATING FLUIDS; POLYMER-SOLUTIONS; CHAIN; APPROXIMATION; DEPENDENCE; MIXTURES; SURFACES; BEHAVIOR; FORCES SO - Molecular Physics 2000 ;98(17):1287-1293 588 UI - 16637 AU - Duda Y AU - Ochoa FL AU - Trokhymchuk A AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoDuda, Y, Natl Acad Sci Ukraine, Inst Condensed Matter Phys, Lviv 11, Ukraine TI - Adsorption of chain molecules into a thin film structure and solvation interaction versus molecular flexibility AB - The influence of molecular flexibility on the properties of thin fluid films formed by linear chain molecules is studied by means of a singlet level of inhomogeneous integral equation theory. The considered m-mer chain molecules are formed through the polymerization of m hard-sphere beads with two sticky bonds randomly placed inside each bead core. Different molecular flexibility, from totally flexible up to almost completely rigid is reached by varying the interbead bonding length. The homogeneous properties of the same model that is necessary input to the singlet approach are extracted from the Wertheim's theory of polymerization. The adsorption, local density distribution, disjoining pressure and solvation force of the chain molecule films confined by attractive and repulsive surfaces are analyzed. The obtained results indicate significant influence of the molecular flexibility on the film layering that is the origin of oscillations of solvation interaction arising between film surfaces. The oscillations of solvation pressure and force become more pronounced with restriction of molecular flexibility and with increase of bulk volume fraction of chain molecules. The decay of the oscillations across the film depends on the chain length and on the physical nature of the film surfaces, i.e. whether they are lyophilic or :lyophobic. The partitioning of chain molecules from the bulk into the film strongly depends on the chain flexibility and this effect is more pronounced for the lyophilic surfaces. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000084814300010 L2 - film;chain molecules;flexibility;integral equations;THERMODYNAMIC PERTURBATION-THEORY; DIRECTIONAL ATTRACTIVE FORCES; ORNSTEIN-ZERNIKE EQUATION; HARD-SPHERE; INTEGRAL-EQUATION; MONTE-CARLO; POLYMER BLENDS; STIFFNESS DISPARITY; SURFACE SEGREGATION; BRANCHED ALKANES SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2000 ;161(3):477-488 589 UI - 16157 AU - Duffy CM AU - Tucker L AU - Burgos-Vargas R AD - Montreal Childrens Hosp, Div Rheumatol, Montreal, PQ H3H 1P3, CanadaTufts Univ, Dept Paediat, Boston, MA 02111, USAHosp Gen Mexico, Div Res, Mexico City, DF, MexicoDuffy, CM, Montreal Childrens Hosp, Div Rheumatol, 2300 Tupper St,Rm C503, Montreal, PQ H3H 1P3, Canada TI - Update on functional assessment tools AB - In recent years, there has been a tremendous growth in the development of measurement instruments that evaluate health status, functional status, disability, and quality of life in adults with rheumatic diseases. In the past decade, similar measures have been developed for application in children with rheumatic diseases. These include the Childhood Arthritis Impact Measurement Scales (CHAIMS), the Childhood Health Assessment Questionnaire (CHAQ), the Juvenile Arthritis Functional Assessment Report (JAFAR), the Juvenile Arthritis Self-report Index (JASI), the juvenile Arthritis Quality of Life Questionnaire (JAQQ), and the Childhood Arthritis Health Profile (CAHP). The latter 2 instruments assess health related quality of life (HRQOL) and they are discussed here. The need to adapt this kind of instrument for use in an international climate creates an interesting dilemma and this is discussed MH - Canada MH - Mexico|Distrito Federal MH - USA PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 10 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000086579700005 L2 - health related quality of life;juvenile rheumatoid arthritis;international studies;JAFAR;CHAQ;JASI;JAQQ;CAHP;JUVENILE RHEUMATOID-ARTHRITIS; HEALTH-ASSESSMENT-QUESTIONNAIRE; CHILDREN; QUALITY; VERSION; PAIN; LIFE; SPONDYLOARTHRITIDES; RELIABILITY; DISABILITY SO - Journal of Rheumatology 2000 ;27():11-14 590 UI - 15562 AU - Dukelsky J AU - Hirsch JG AU - Schuck P AD - CSIC, Inst Estructura Mat, Madrid 28006, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoIN2P3, CNRS, Inst Sci Nucl, F-38026 Grenoble, FranceDukelsky, J, CSIC, Inst Estructura Mat, Serrano 123, Madrid 28006, Spain TI - Occupation numbers in self consistent RPA AB - A method is proposed which allows to calculate within the SCRPA theory the occupation numbers via the single particle Green function. This scheme complies with the Hugenholtz van Hove theorem. In an application to the Lipkin model it is found that this prescription gives consistently better results than two other commonly used approximations: lowest order boson expansion and the number operator method MH - France MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000088447900003 L2 - RANDOM-PHASE-APPROXIMATION; FERMI SYSTEMS SO - European Physical Journal A 2000 ;7(2):155-165 591 UI - 14981 AU - Dukin AA AU - Feoktistov NA AU - Golubev VG AU - Medvedev AV AU - Pevtsov AB AU - Sel'kin AV AD - AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaBUAP, Inst Ciencias, Ctr Invest Disposit Semicond, Puebla 72570, MexicoSel'kin, AV, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia TI - Optical properties of a Fabry-Perot microcavity with Er-doped hydrogenated amorphous silicon active layer AB - Fabry-Perot hydrogenated amorphous silicon (a-Si:H)/amorphous-SiOx:H microcavities with an erbium-doped a-Si:H active region are fabricated by a plasma-enhanced chemical-vapor deposition technique in a single technological cycle without exposure to air between the intermediate operations. A metalorganic compound is used to incorporate erbium in the active a-Si:H layer. Transmission, reflection, and photoluminescence spectra of the microcavities are measured. The experimental data are compared to theoretical calculations performed in terms of field amplitudes generated by stochastic excitation sources. (C) 2000 American Institute of Physics. [S0003-6951(00)04945-7] MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000165069500023 L2 - I-N STRUCTURES; PHOTOLUMINESCENCE; ERBIUM; LIGHT; FILMS SO - Applied Physics Letters 2000 ;77(19):3009-3011 592 UI - 14884 AU - Dumont HJ AU - Silva-Briano M AD - State Univ Ghent, Inst Anim Ecol, B-9000 Ghent, BelgiumUniv Autonoma Aguascalientes, Ctr Ciencias Basicas, Dept Biol, Aguascalientes, Ags, MexicoDumont, HJ, State Univ Ghent, Inst Anim Ecol, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - Karualona n.gen. (Anomopoda : Chydoridae), with a description of two new species, and a key to all known species AB - (T)he species group of Alona karua is raised to generic rank and named Karualona. The genus is defined on the basis of a number of characters of the body and its appendages. Tentative new microcharacters are introduced, related to the type and length of selected setae of P1, P2, P3 and P4. Two new species are described, one from the island of Socotra and one from Mexico. A key to the five currently recognized species is given MH - Belgium MH - Mexico|Aguascalientes PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 19 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000165253800006 L2 - Chydoridae;Anomopoda;taxonomy;Karualona;trunk limbs;GROUNDWATER SO - Hydrobiologia 2000 ;435(1-3):61-82 593 UI - 15974 AU - Duran-Paramo E AU - Garcia-Kirchner O AU - Hervagault JF AU - Thomas D AU - Barbotin JN AD - Univ Technol Compiegne, UPRESA CNRS 6022, Lab Technol Enzymat, F-60205 Compiegne, FranceIPN, UPIBI, Dept Bioproc, Mexico City 07340, DF, MexicoUniv Picardie, Lab Genie Cellulaire, F-80039 Amiens, FranceDuran-Paramo, E, IPN, UPIBI, Dept Bioproc, Ave Acueducto S-N, Mexico City 07340, DF, Mexico TI - alpha-Amylase production by free and immobilized Bacillus subtilis AB - The effect of glucose on the alpha-amylase production by Bacillus subtilis ATCC-21556 was studied. Initial glucose concentrations up to 20 g/L were found to be directly proportional to the specific alpha-amylase production in an immobilized-cell batch system, whereas a free-cell batch system presented an inversely proportional relationship with the initial glucose concentration. This might be owing to the alpha-amylase repression by the glucose present in the culture medium. Three hundred eighty-five percent of the specific a-amylase production with the free-cell system was produced by the immobilized-cell batch culture MH - France MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0273-2289 UR - ISI:000087211500042 L2 - alpha-amylase production;Bacillus subtilis;catabolite repression;cells immobilization;LICHENIFORMIS CELLS; AMYLOLIQUEFACIENS; MEMBRANES; GROWTH SO - Applied Biochemistry and Biotechnology 2000 ;84-6():479-485 594 UI - 16620 AU - Duron S AU - Rivera-Noriega R AU - Leyva MA AU - Nkeng P AU - Poillerat G AU - Solorza-Feria O AD - CINVESTAV, Dept Quim, IPN, Mexico City 07000, DF, MexicoUniv Strasbourg 1, Lab Electrochim & Chim Corps Solides, F-67008 Strasbourg, FranceDuron, S, CINVESTAV, Dept Quim, IPN, A Postal 14-740, Mexico City 07000, DF, Mexico TI - Oxygen reduction on a RuxSy(CO)(n) cluster electrocatalyst in 0.5 M H2SO4 AB - A ruthenium-sulfur carbonyl cluster electrocatalyst, RuxSy(CO)(n), was synthesized by pyrolysis of Ru-3(CO)(12) and elemental sulfur in a sealed ampoule at 300 degrees C. The pyrolyzed compound was characterized by DSC, FT-IR. XRD and SEM (EDX) techniques. The electrocatalytic activity and kinetic parameters for the molecular oxygen reduction were determined by a rotating ring-disk electrode (RRDE) in a 0.5 M H2SO4 solution at 25 degrees C. The cathodic polarization indicates two Tafel slopes: -0.124 +/- 0.002 V dec(-1) at low and -0.254 +/- 0.003 V dec(-1) at high overpotentials. and first-order kinetics with respect to O-2 concentration. From the analysis of Levich plots and RRDE results, the oxygen reduction on RuxSy(CO)(n) was determined to proceed mostly via a multielectron transfer path (4e(-)) to water formation (> 94%) MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Electrochemistry U5 - J;Article AV - English IS - 1432-8488 UR - ISI:000084839300003 L2 - rotating ring-disk electrode;oxygen;reduction;ruthenium-cluster electrocatalyst;sulfuric acid;METAL-CLUSTERS; CATALYSIS; CHEMISTRY; KINETICS; OSMIUM SO - Journal of Solid State Electrochemistry 2000 ;4(2):70-74 595 UI - 15126 AU - Eben A AU - Benrey B AU - Sivinski J AU - Aluja M AD - ARS, USDA, Ctr Med Agr & Vet Entomol, Gainesville, FL 32608, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoInst Ecol, AC, Xalapa 91000, Veracruz, MexicoEben, A, Inst Ecol, AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Host species and host plant effects on preference and performance of Diachasmimorpha longicaudata (Hymenoptera : Braconidae) AB - Naive female Diachasmimorpha longicaudata (Ashmead), a solitary endoparasitoid of tephritid fruit flies, exhibited positive responses toward volatiles of host fruits in olfactometer and wind tunnel bioassays. Although no significant preference for one of the test fruits, mango, Mangifera indica L., or grapefruit, Citrus paradisi Macfaden, was observed, the number of nights in the wind tunnel was higher in the presence of mangos. In the olfactometer trials, parasitoids preferred ny infested over noninfested grapefruits, and infested over noninfested mangos. Reproductive performance bioassays were conducted using Anastrepha ludens (Loew) larvae (Diptera: Tephritidae) reared in grapefruit, orange, mango, or artificial diet, and Anastrepha obliqua (Macquart) larvae reared in mango as parasitoid hosts. Parasitoid performance was compared for 2 Anastrepha species and 3 fruit species. Significant effects of fruit ny species and of the diet of fruit fly larvae on longevity, size, and progeny production of D. longicaudata were observed. Anastrepha ludens reared in grapefruit was the best host in terms of offspring longevity, size, and number of female progeny, but parasitoids that developed in A. ludens reared in mango had higher overall fecundity. Anastrepha ludens reared in mango was a better host than A. obliqua in the same fruit. No correlation between parasitoid size and demographic parameters was found. The results of this laboratory study showed that host preference and offspring performance are partially related MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000089623000013 L2 - Tephritidae;Anastrepha spp.;Braconidae;Diachasmimorpha longicaudata;chemical ecology;tritrophic effects;CARIBBEAN FRUIT-FLY; RHAGOLETIS-POMONELLA FLIES; BIOSTERES-LONGICAUDATUS; VOLATILE INFOCHEMICALS; OVIPOSITION PREFERENCE; PHYTOPHAGOUS INSECTS; PUPAL PARASITOIDS; LARVAL-PUPAL; TEPHRITIDAE; ANASTREPHA SO - Environmental Entomology 2000 ;29(1):87-94 596 UI - 14858 AU - Elias-Gutierrez M AU - Smirnov NN AD - El Colegio Frontera Sur, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoRussian Acad Sci, Severtzov Inst, Moscow 117071, RussiaElias-Gutierrez, M, El Colegio Frontera Sur, Unidad Chetumal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - Macrothrix marthae, a new species (Crustacea : Anomopoda : Macrothricidae), a highly specialized macrothricid from Mexico AB - Macrothrix marthae new species is described from a tropical epi-contental lagoon, near the gulf coast of Mexico. The structure of the second antenna resembles some taxa related to the Macrothrix triserialis-group, but mostly to the South-American Macrothrix superaculeata (Smirnov, 1982). However, parthenogenetic females of M. marthae are characterized by both morphological differences and strong specialization for scraping in the thoracic limbs I-V. Some of these distinguishing characters are: internal distal lobe of trunk limb I with three strongly pectinate setae, limbs II, III, and V with modified setae bearing well-developed pectens. The postabdomen has small spines, with no lobe formation. The new species was found to be associated with water hyacinth roots, and the adaptations observed are thought to be used to scrape efficiently organic matter from these roots MH - Mexico|Quintana Roo MH - Russia PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 5 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000165285300008 L2 - CLADOCERA SO - Proceedings of the Biological Society of Washington 2000 ;113(3):652-660 597 UI - 15247 AU - Elings A AD - CIMMYT, Int Ctr Maize & Wheat Improvement, Mexico City 06600, DF, MexicoElings, A, Univ Wageningen & Res Ctr, Platn Res Int, NL-6700 AA Wageningen, Netherlands TI - Estimation of leaf area in tropical maize AB - Leaf area development at regular time intervals during the growing season is estimated by many crop growth models and is needed for competition studies, In plant breeding programs, observation is generally restricted to a single leaf area estimate or assessment of the plant type, Two procedures that build on earlier studies are presented to estimate total plant leaf area of maize (Zea mays L.), Leaf area development of six tropical maize cultivars grown in 1995 and 1996 in several tropical environments in Mexico (both favorable and moisture- and N-limited) was observed and analyzed. First, the validity of a bell-shaped curve describing the area of individual leaves as a function of leaf number was investigated, When individual cultivar-environment combinations were normalized for area of the largest leaf and for total leaf number, one parameter set described all combinations. It remained difficult, however, to estimate these parameters in advance, which limits predictive applications in crop growth models. Analytical application after flowering, when parameter values can be determined, is possible. Second, a method was developed to directly estimate total Leaf area when total leaf number and area of the largest leaf are known, The method makes use of the bets that the area of the largest leaf relative to total plant leaf area is constant and that this constant is linearly related to total leaf number. This study has shown that approaches previously presented by others are applicable in modified form over a wide range of environmental renditions MH - Mexico|Distrito Federal MH - Netherlands PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000089408000007 SO - Agronomy Journal 2000 ;92(3):436-444 598 UI - 15635 AU - Elitsur Y AU - Rosenberg AJ AU - Jimenez-Aranda G AU - Vera-Soto H AU - Belkind-Gerson J AD - Marshall Univ, Huntington, WV, USAE Carolina Univ, Greenville, NC, USAHosp Nino Morelense, Cuernavaca, Morelos, Mexico TI - Anal index values and constipation in older children MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0016-5085 UR - ISI:000086784100016 SO - Gastroenterology 2000 ;118(4):A1067-A1067 599 UI - 16368 AU - Elizondo-Riojas MA AU - Bas V AU - Kozelka J AD - UMR CNRS 8601, Chim & Biochim Pharmacol & Toxicol Lab, F-75270 Paris, FranceUniv Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Ctr Univ Contra Canc, Monterrey, NL, MexicoKozelka, J, UMR CNRS 8601, Chim & Biochim Pharmacol & Toxicol Lab, 45 Rue St Peres, F-75270 Paris, France TI - Circular dichroism spectra of the individual rotamers of [Pt(N,N-dmen)(GpG)](+) (N,N-dmen = N,N-dimethylethylenediamine) indicate that the base-base oscillator coupling is not the main source of ellipticity in cis-PtG(2)L(2) head-to-head complexes AB - The asymmetrical platinum complex [PtCl2(N,N-dmen)] (N,N-dmen = N, N-dimethylethylenediamine) reacts with the dinucleotide GpG to form two isomeric chelates of the formula [Pt(N,N-dmen)(GpG)](+) [9]. One of the isomers forms two stable rotamers separable by HPLC, whereas the other apparently prefers one single rotameric form. The favored conformations of these three forms were elucidated by means of molecular mechanics and dynamics techniques. In parallel, we have prepared the adduct, isolated the three rotamers, and recorded their solution circular dichroism (CD) spectra. For the first time we were thus able to correlate the CD features of individual rotamers of a cis-Pt(GpG) chelate with their structures. We show here that the two forms labeled in Inagaki's paper 1'e and 2e have the same right-handed helicoidal arrangement of the guanine bases but display different CD spectra in which the prominent bands have inverted signs. Thus, base-base interactions cannot be the principal cause of the CD of these compounds MH - France MH - Mexico|Nuevo Leon PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0949-8257 UR - ISI:000085954900005 L2 - circular dichroism;molecular modeling;oligonucleotides;platinum complexes;NUCLEIC-ACIDS; ANTICANCER DRUGS; CHEMICAL-SHIFTS; FORCE-FIELD; RIBOSE; CIS-(NO3)2; GUANINE; ADDUCTS SO - Journal of Biological Inorganic Chemistry 2000 ;5(1):45-50 600 UI - 16018 AU - Ellertson C AU - Shochet T AU - Blanchard K AU - Trussell J AD - Princeton Univ, Off Populat Res, Princeton, NJ 08544, USACol Villa Coyoacan, Populat Council, Mexico City, DF, MexicoPopulat Council, Johannesburg, South AfricaTrussell, J, Princeton Univ, Off Populat Res, 21 Prospect Ave, Princeton, NJ 08544 USA TI - Emergency contraception: A review of the programmatic and social science literature AB - Many biomedical aspects of emergency contraception have been investigated and documented for >30 years now. A large number of social science questions, however, remain to be answered. In this article, WE review the rapidly growing but geographically lopsided literature on this topic. Using computer database searches supplemented by reference reviews and professional correspondence with those active iu the field, we gathered literature on the social science and service delivery aspects Of emergency contraception published in English zip through December 1998, as well as a few unpublished papers from the same time and slightly later, representing regions where published material is practically nonexistent. Methodologically acceptable papers are summarized in our tables and text, and form the basis for suggested improvements in existing emergency contraceptive services, The review also offers ideas for designing new emergency contraception services where they do not yet exist. WE conclude by proposing an agenda for further social science research in this area. CONTRACEPTION 2000;61:145-186 (C) 2000 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA MH - South Africa PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 45 U4 - Obstetrics & Gynecology U5 - J;Review AV - English IS - 0010-7824 UR - ISI:000087056000001 L2 - emergency contraception;delivery of health care;contraceptives;postcoital;POSTCOITAL CONTRACEPTION; WOMENS KNOWLEDGE; GENERAL-PRACTICE; YUZPE REGIMEN; REQUESTING TERMINATION; TEENAGERS KNOWLEDGE; PILLS; PREGNANCY; ATTITUDES; POPULATION SO - Contraception 2000 ;61(3):145-186 601 UI - 16400 AU - Ellertson C AU - Elul B AU - Ambardekar S AU - Wood L AU - Carroll J AU - Coyaji K AD - Populat Council, Mexico City 11560, DF, MexicoPopulat Council, New York, NY 10021, USAKEM Hosp, Pune, Maharashtra, IndiaFeminist Womens Hlth Ctr, Atlanta, GA, USAUniv Calif Berkeley, Berkeley, CA 94720, USAEllertson, C, Populat Council, Apartado Postal 105-152, Mexico City 11560, DF, Mexico TI - Accuracy of assessment of pregnancy duration by women seeking early abortions AB - Background Advances in medical abortion might allow women seeking early abortions to terminate their pregnancies safely and effectively without medical supervision. We investigated whether such women can calculate pregnancy duration accurately, a key step in unsupervised use. Methods 422 women seeking first-trimester abortions in two clinics (Pune, India, and Atlanta, USA) used a simple worksheet and calendar to calculate the duration of gestation from the date of last menstrual period (LMP) and/or of unprotected intercourse. Clinicians then used standard clinic practices to estimate pregnancy duration. We compared the two sets of estimates, focusing on women who fell into the "caution zone" (ie, had pregnancy durations >8 weeks according to providers, but less than or equal to 8 weeks by their own estimates). Findings The participants were generally representative of the women seeking abortion at the two clinics. 217 (97.7%) of 222 women in Atlanta and 173 (86.5%) of 200 in Pune could produce an estimate of pregnancy duration. Most (85.4% in Atlanta; 93.6% in Pune) of these estimates were within 2 weeks of those made by providers. For estimates based on LMP, only 10.0% (exact 95% CI 6.2-15.0) of women in Atlanta and 9.8% (5.8-15.3) in Pune fell into the caution zone. For estimates based on a date of intercourse, just 7.7% (4.0-13.1) of women in Atlanta and 3.4% (0-17.8) in Pune fell into the caution zone, although fewer women could use this method. Interpretation The vast majority of women seeking first-trimester abortion in this study could accurately calculate pregnancy duration within a margin of error clinically inconsequential for safe use of unsupervised medical abortion MH - India MH - Mexico|Distrito Federal MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 12 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000085896000009 L2 - MIFEPRISTONE-MISOPROSTOL; GESTATIONAL-AGE; UNITED-STATES; TERMINATION; ACCEPTABILITY; TRIAL SO - Lancet 2000 ;355(9207):877-881 602 UI - 15273 AU - Ellingson LJ AU - Kauffman JB AU - Cummings DL AU - Sanford RL AU - Jaramillo VJ AD - Oregon State Univ, Dept Fisheries & Wildlife, Corvallis, OR 97331, USAUniv Denver, Dept Biol Sci, Denver, CO 80208, USAUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia, Michoacan, MexicoKauffman, JB, Oregon State Univ, Dept Fisheries & Wildlife, Corvallis, OR 97331 USA TI - Soil N dynamics associated with deforestation, biomass burning, and pasture conversion in a Mexican tropical dry forest AB - Deforestation and land conversion in deciduous dry forests are occurring throughout the Neotropics, yet few studies have described soil N dynamics associated with this land-use/land-cover change. Soil nitrogen dynamics were measured before, and after, slash burning in two different fin-severity treatments (a high-severity fire with 80% of the aboveground biomass consumed, and a low-severity fire where 63% was consumed) in a neotropical dry forest ecosystem near Chamela, Jalisco, Mexico. We repeated these measurements three months after burning (corn field), the first year after slash-and-burn (pasture), and before, and after, a fire approximate to 2 years after the initial slash fires. Soil pH, total and inorganic soil nitrogen pools, and potential net mineralization and nitrification rates were measured. Slash burning resulted in dramatic but short-term increases in inorganic nitrogen and soil pH. Mineral N pools in surface soils (0-10 cm) increased from 9 to 44 kg ha(-1) in the low-severity treatment and from 18 to 57 kg ha(-1) in the high-fire severity treatment. This was due to an increase in soil NH4-N; NO3-N concentrations were lowered by fire. Surface soil pH increased 1.1 units following the low-severity fires and 2.3 units following the high-severity fires. Soil pH remained elevated in the perturbed sites for the duration of the study, Immediately after the initial slash fires, N mineralization was higher in the burned plots compared to the adjacent undisturbed forest. Potential nitrification was >9.5 mu g NO3-N g(-1) soil day(-1) in the slash-and-burn plots, and 3.9 mu g NO3-N g(-1) soil day(-1) in an adjacent reference forest. potential nitrification was significantly higher in the high-severity treatment compared to the low-severity treatment. The increases in mineralization were likely a response to the large pulse of NH4-N created via pyromineralization during the slash fires. The pattern of increased mineral N pools and potential rates of N mineralization in perturbed sites was short-lived. Compared to the reference forest, N mineralization rates in burned plots were similar 3 months after the fire, and lower 2 years following conversion. In contrast to the initial slash fire, we did not find a significant increase in available mineral N (NH4-N) pools, or potential mineralization immediately following the pasture fires in 1995. Soil surface total N concentrations decreased from 4.3 and 5.4 mg g(-1) at the start of the study, to 2.5 and 2.4 mg g(-1) at the end of the study in the low- and high-fire severity treatments, respectively. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000089269400004 L2 - deforestation;fire ecology;nitrification;nitrogen mineralization/transformation;tropical dry forest;tropical pasture;slash-and-burn agriculture;NET NITROGEN MINERALIZATION; DECIDUOUS FOREST; FIRE; NITRIFICATION; TRANSFORMATIONS; VEGETATION; RATES SO - Forest Ecology and Management 2000 ;137(1-3):41-51 603 UI - 15025 AU - Elliott SJ AU - Sperandio V AU - Giron JA AU - Shin S AU - Mellies JL AU - Wainwright L AU - Hutcheson SW AU - McDaniel TK AU - Kaper JB AD - Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201, USABenemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Puebla, MexicoReed Coll, Dept Biol, Portland, OR 97202, USANorthwestern Univ, Ctr Biotechnol, Evanston, IL 60201, USAUniv Maryland, Dept Mol Genet & Cell Biol, College Pk, MD 20742, USAIllumina Inc, San Diego, CA 92121, USAKaper, JB, Univ Maryland, Sch Med, Ctr Vaccine Dev, 685 W Baltimore St, Baltimore, MD 21201 USA TI - The locus of enterocyte effacement (LEE)-encoded regulator controls expression of both LEE- and non-LEE-encoded virulence factors in enteropathogenic and enterohemorrhagic Escherichia coli AB - Regulation of virulence gene expression in enteropathogenic Escherichia coli (EPEC) and enterohemorrhagic E, coli (EHEC) is incompletely understood. In EPEC, the plasmid-encoded regulator Per is required for maximal expression of proteins encoded on the locus of enterocyte effacement (LEE), and a LEE-encoded regulator (Ler) is part of the Per-mediated regulatory cascade upregulating the LEE2, LEE3, and LEE4 promoters. We now report that Ler is essential for the expression of multiple LEE-located genes in both EPEC and EHEC, including those encoding the type III secretion pathway, the secreted Esp proteins, Tir, and intimin. Ler is therefore central to the process of attaching and effacing (AE) lesion formation. Ler also regulates the expression of LEE-located genes not required for AE-lesion formation, including rorf2, orf10, rorf10, orf19, and espF, indicating that Ler regulates additional virulence properties. In addition, Ler regulates the expression of proteins encoded outside the LEE that are not essential for AE lesion formation, including TagA in EHEC and EspC in EPEC. Delta ler mutants of both EPEC and EHEC show altered adherence to epithelial cells and express novel fimbriae, Ler is therefore a global regulator of virulence gene expression in EPEC and EHEC MH - USA MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 88 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000090007000005 L2 - PROTEIN H-NS; III SECRETION SYSTEM; PATHOGENICITY ISLAND; DOMAIN ORGANIZATION; EFFACING PHENOTYPE; EPITHELIAL-CELLS; O157-H7; PLASMID; IDENTIFICATION; INFECTIONS SO - Infection and Immunity 2000 ;68(11):6115-6126 604 UI - 14697 AU - Elmegreen BG AU - Kaufman M AU - Struck C AU - Elmegreen DE AU - Brinks E AU - Thomasson M AU - Klaric M AU - Levay Z AU - English J AU - Frattare LM AU - Bond HE AU - Christian CA AU - Hamilton F AU - Noll K AD - IBM Corp, Div Res, Armonk, NY 10504, USAOhio State Univ, Dept Phys, Columbus, OH 43210, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAIowa State Univ, Dept Phys & Astron, Ames, IA, USAVassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12601, USAUniv Guanajuato, Dept Astron, Guanajuato, MexicoOnsala Space Observ, S-43900 Onsala, SwedenSpace Telescope Sci Inst, Baltimore, MD 21218, USAElmegreen, BG, IBM Corp, Div Res, Armonk, NY 10504, USA TI - Hubble Space Telescope Observations of the interacting galaxies NGC 2207 and IC 2163 (vol 120, pg 630, 2000) MH - Mexico|Guanajuato MH - Sweden MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Correction AV - English IS - 0004-6256 UR - ISI:000165870800046 SO - Astronomical Journal 2000 ;120(6):3371-3371 605 UI - 15369 AU - Elmegreen BG AU - Kaufman M AU - Struck C AU - Elmegreen DM AU - Brinks E AU - Thomasson M AU - Klaric M AU - Levay Z AU - English J AU - Frattare LM AU - Bond HE AU - Christian CA AU - Hamilton F AU - Noll K AD - IBM Corp, Div Res, TJ Watson Res Ctr, Yorktown Heights, NY 10598, USAOhio State Univ, Dept Phys, Columbus, OH 43210, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAIowa State Univ, Dept Phys & Astron, Ames, IA 50010, USAVassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoOnsala Space Observ, S-43992 Onsala, SwedenSpace Telescope Sci Inst, Baltimore, MD 21218, USAElmegreen, BG, IBM Corp, Div Res, TJ Watson Res Ctr, POB 218, Yorktown Heights, NY 10598 USA TI - Hubble Space Telescope observations of the interacting galaxies NGC 2207 and IC 2163 AB - Hubble Space Telescope (HST) images of the galaxies NGC 2207 and IC 2163 show star formation and dust structures in a system that has experienced a recent grazing encounter. Tidal forces from NGC 2207 compressed and elongated the disk. of IC 2163, forming an oval ridge of star formation along a caustic where the perturbed gas rebounded after its inward excursion. Gas flowing away from this ridge has a peculiar structure characterized by thin parallel dust filaments transverse to the direction of motion. The filaments become thicker and longer as the gas approaches the tidal arm. Star formation that occurs in the filaments consistently lags behind, as if the exponential disk pressure gradient pushes outward on the gas but not on the young stars. Numerical models suggest that the filaments come from flocculent spiral arms that were present before the interaction. The arms stretch out into parallel filaments as the tidal tail forms. A dust lane at the outer edge of the tidal tail is a shock front where the flow abruptly changes direction. Gas at small-to-intermediate radii along this edge flows back toward the galaxy, while elsewhere in the tidal arm, the gas flows outward. A spiral arm of NGC 2207 that is backlit by IC 2163 is seen with HST to contain several parallel, knotty filaments spanning the full width of the arm. These filaments are probably shock fronts in a density wave. The parallel structure suggests that the shocks occur in several places throughout the arm, or that the interarm gas is composed of spiral-like wisps that merge together in the arms. Blue clusters of star formation inside the clumps of these dust lanes show density-wave triggering in unprecedented detail. The star formation process seems to be one of local gravitational collapse, rather than cloud collisions. Spiral arms inside the oval of IC 2163 have a familiar geometry reminiscent of a bar, although there is no obvious stellar bar. The shape and orientation of these arms suggest they could be the result of inner Lindblad resonance-related orbits in the cos 2 theta tidal potential that formed the oval. Their presence suggests that tidal forces alone may initiate a temporary nuclear gas how and eventual starburst without first forming a stellar bar. Several emission structures resembling jets or conical flows that are 100-1000 pc long appear in these galaxies. In the western arm of NGC 2207, there is a dense dark cloud with a conical shape 400 pc long and a bright compact cluster at the tip, and there is a conical emission nebula of the same length that points away from the cluster in the other direction. This region also coincides with a nonthermal radio continuum source that is similar to 1000 times the luminosity of Cas A at lambda = 20 cm. Surrounding clusters in arclike patterns may have been triggered by enormous explosions MH - Mexico|Guanajuato MH - USA MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000089040800011 L2 - dust, extinction;galaxies : interactions;galaxies : ISM;ISM : jets and outflows;ISM : kinematics and dynamics;SPIRAL GALAXIES; MOLECULAR CLOUDS; OCULAR GALAXY; DUST LANES; GAS; SIMULATIONS; COMPANION; EXTINCTION; COMPONENTS; COLLISIONS SO - Astronomical Journal 2000 ;120(2):630-644 606 UI - 14389 AU - Encarnacion DR AU - Franzblau SG AU - Tapia CA AU - Cedillo-Rivera R AD - Univ Autonoma BCS, Dept Agron, La Paz 23080, BCS, MexicoNatl Nahsens Dis Ctr, Lab Res Branch, Baton Rouge, LA 70894, USAHosp Pediat, Ctr Med Nacl Siglo XXI IMSS, Unidad Invest Med Enfermedad Infecciosas & Parasit, Mexico City 06725, DF, MexicoEncarnacion, DR, Univ Autonoma BCS, Dept Agron, AP 19-B, La Paz 23080, BCS, Mexico TI - Screening of marine organisms for antimicrobial and antiprotozoal activity AB - Ethanol extracts from a group of 53 marine organisms, including a newly identified species, from Baja California Sur (Mexico), were evaluated for their antimicrobial and antiparasitic activity. The activity against Staphylococcus aureus, Streptococcus faecalis, Bacillus subtilis (Gram), Escherichia coli (Gram) and Candida albicans (yeast) was determined by the diffusion agar method. Aplysina gerardogreeni (Demospongiae) was found to be the most active sample. In addition, A. gerardogreeni, Pacifigorgia media, and Pacifigorgia sp. possess significant activity against Mycobacterium tuberculosis H(37)Rv and Pacifigorgia media and Geodia sp. against Mycobacterium avium. From this group, 15 ethanol extracts were tested in vitro against Entamoeba histolytica and Giardia lamblia. Litotamnium crassiussculum, Geodia sp., Pacifigorgia sp. showed significant activity against Entamoeba histolytica while Myxilla incrustans and Muricea appressa were active against Giardia lamblia. Litotamnium crassiussculum showed activity against both trophozoites MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal MH - USA PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Medical Laboratory Technology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1388-0209 UR - ISI:000166737900011 L2 - softcorals;sponges;echinodermata extracts;antimicrobial;antiprotozoal activity;TUBERCULOSIS SO - Pharmaceutical Biology 2000 ;38(5):379-384 607 UI - 15719 AU - Encarnacion RD AU - Sandoval E AU - Malmstrom J AU - Christophersen C AD - Univ Copenhagen, Dept Chem, Marine Chem Sect, DK-2100 Copenhagen, DenmarkUniv Autonoma Baja California Sur, Dept Agron, La Paz 23080, Baja California, MexicoChristophersen, C, Univ Copenhagen, Dept Chem, Marine Chem Sect, Univ Parken 5, DK-2100 Copenhagen, Denmark TI - Calafianin, a bromotyrosine derivative from the marine sponge Aplysina gerardogreeni AB - Calafianin (1) and two known compounds, aerothionin and (3,5-dibromo-2-hydroxy-4-methoxyphenyl)-acetic acid, were isolated from the marine sponge Aplysina gerardogreeni. The structure of 1 was determined by NMR analysis and mass spectrometry MH - Denmark MH - Mexico|Baja California PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000087922900036 SO - Journal of Natural Products 2000 ;63(6):874-875 608 UI - 16459 AU - Erney RM AU - Malone WT AU - Skelding MB AU - Marcon AA AU - Kleman-Leyer KM AU - O'Ryan ML AU - Ruiz-Palacios G AU - Hilty MD AU - Pickering LK AU - Prieto PA AD - Abbott Labs, Ross Prod Div, Columbus, OH, USAUniv Chile, Fac Med, Inst Ciencias Biomed, Microbiol Program, Santiago 7, ChileNatl Inst Nutr, Dept Infect Dis, Mexico City, DF, MexicoEastern Virginia Med Sch, Norfolk, VA 23501, USAChildrens Hosp Kings Daughters, Ctr Pediat Res, Norfolk, VA, USAPrieto, PA, 3300 Stelzer Rd,RP3-2, Columbus, OH 43219, USA TI - Variability of human milk neutral oligosaccharides in a diverse population AB - Background: A complex array of free oligosaccharides is a distinctive compositional feature of human milk. Although these oligosaccharides have been studied for several years, their variability and distribution have not been systematically studied, and their nutritional and functional roles have not been elucidated. This report describes a study in which a large number of human milk samples were analyzed for the presence;md content of nine neutral oligosaccharides. The resultant data were used to probe for distribution trends by donor groups and stage of lactation. Methods: Milk samples from 435 women residing in 10 countries were analyzed using a simple preparation procedure, gel filtration, and high-performance anion-exchange chromatography. Results: All samples contained structures based on lacto-N-neotetraose and lacto-N-tetraose. This contrasts with the fucosyloligosaccharides tested, none of which was detected in 100% of the samples. Unexpected distribution trends were observed. For example, 100% of the samples from Mexico (n = 156) contained 2'-fucosyllactose, whereas only 46% of the samples from the Philippines (n = 22) contained this structure. Concentration ranges for the analyzed oligosaccharides revealed quantitative and qualitative distribution trends. Conclusions: The oligosaccharide composition of human milk varied among samples. The geographical origin of the donors was one of the factors that accounted for this variability. This can be explained by genetically determined traits that are not uniformly distributed. Results indicated that further systematic studies are needed to ascertain the effect of other factors, such as lactation stage or diet MH - Chile MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 18 U4 - Gastroenterology & Hepatology;Nutrition & Dietetics;Pediatrics U5 - J;Article AV - English IS - 0277-2116 UR - ISI:000085455300016 L2 - fucosyloligosaccharide;fucosyltransferase;human milk;oligosaccharides;BLOOD-GROUP ANTIGENS; MONOCLONAL-ANTIBODIES; LEWIS PHENOTYPES; GROUP SYSTEM; SECRETOR; EXPRESSION; CELLS; ADHERENCE; LACTATION; TAIWAN SO - Journal of Pediatric Gastroenterology and Nutrition 2000 ;30(2):181-192 609 UI - 14652 AU - Escamilla A AU - Sanvicente M AU - Sosa M AU - Galindo-Leal C AD - Consejo Agrosilvopecuario & Serv X Pujil, Mexico City, DF, MexicoStanford Univ, Dept Biol Sci, Ctr Conservat Biol, Stanford, CA 94305, USAEscamilla, A, Consejo Agrosilvopecuario & Serv X Pujil, Mexico City, DF, Mexico TI - Habitat mosaic, wildlife availability, and hunting in the tropical forest of Calakmul, Mexico AB - Habitat loss and subsistence hunting are two of the main activities that affect wildlife in frontier areas. We compared subsistence hunting patterns in four villages with different ethnic composition and degree of habitat disturbance in the vicinity of Calakmul Biosphere Reserve, Campeche, Mexico. We also compared differences between some of these villages in harvest composition and prey availability to determine hunting preferences. We used a Landsat TM satellite image to analyze the degree of disturbance around the villages. We conducted periodic surveys of subsistence hunting and prey availability. Wildlife availability was assessed monthly on nine transects (3000 m) established in the vicinity of three villages. The relative around of disturbed habitat was smaller in a indigenous Maya village (IV) and larger in a mestizo village (MV). The two mixed-composition villages (MCVs) had intermediate levels of disturbance. Ten species, four large and six small, of birds and mammals accounted for 97% of the hunting records. Hunting was more intense in IV and less intense in MCV1. The three village types has different hunting preferences. The habitat-mosaic composition in the vicinity of the villages influenced prey availability and subsistence-hunting preferences. Changes in the habitat mosaic were caused by the size of the holding and by ethnic composition. In spite of longer settlement time, the habitat mosaic in the vicinity of IV was less transformed than that of the other sites. Their larger holding size and greater diversity of economic activities may explain why the Mayas at IV have transformed the landscape less than the other groups and can hunt more and larger prey MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 19 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000166035800008 L2 - PANTHERA-ONCA; CONCOLOR; HUNTERS; CHOICE; TIMBER; GAME SO - Conservation Biology 2000 ;14(6):1592-1601 610 UI - 14573 AU - Escorcia M AU - Jackwood MW AU - Lucio B AU - Petrone VM AU - Lopez C AU - Fehervari T AU - Tellez G AD - UNAM, FMVZ, Dept Prod Anim Aves, Circuito Exterior CU, Coyoacan 04510, DF, MexicoUniv Georgia, Poultry Diagnost & Res Ctr, Athens, GA 30602, USACornell Univ, Coll Vet Med, Dept Microbiol & Immunol, Unit Avian Hlth, Ithaca, NY 14853, USAEscorcia, M, UNAM, FMVZ, Dept Prod Anim Aves, Circuito Exterior CU, Coyoacan 04510, DF, Mexico TI - Characterization of Mexican strains of avian infectious bronchitis isolated during 1997 AB - Ten infectious bronchitis virus (IBV) isolates were recovered from broiler chickens in the states of Queretaro and Guanajuato in Mexico. The viruses were isolated from trachea, lung, kidney, and cecal tonsils of birds that showed respiratory signs in spite of vaccination with Massachusetts (Mass) and Connecticut strains of IBV. Each isolate was identified by an accession number from 1 to 10. Six of the isolates were neutralized by Mass monoclonal antibodies, whereas the other four were not. In addition, these four isolates did not produce lesions in embryos in the first five to seven passes. These four isolates were further characterized by the reverse transcriprase-polymerase chain reaction and restriction fragment length polymorphism techniques. The electrophoretic patterns for the four isolates were identical but were different from other known IBV isolates MH - Mexico|Distrito Federal MH - USA PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000166226200024 L2 - RT-PCR;avian bronchitis;variants;Mexico;POLYMERASE CHAIN-REACTION; VIRUS; SEROTYPES SO - Avian Diseases 2000 ;44(4):944-947 611 UI - 14932 AU - Escribano A AU - Williams T AU - Goulson D AU - Cave RD AU - Chapman JW AU - Caballero P AD - Univ Publ Navarra, Dept Agr Prod, Lab Entomol Agr & Patol Insectos, Pamplona 31006, SpainECOSUR, AP 36, Tapachula 30700, Chiapas, MexicoUniv Southampton, Sch Biol Sci, Div Biodivers & Ecol, Southampton SO16 7PX, Hants, EnglandEscuela Agr Panamericana, Dept Protecc Vegetal, El Zamorano, HondurasCaballero, P, Univ Publ Navarra, Dept Agr Prod, Lab Entomol Agr & Patol Insectos, Pamplona 31006, Spain TI - Effect of parasitism on a nucleopolyhedrovirus amplified in Spodoptera frugiperda larvae parasitized by Campoletis sonorensis AB - We evaluated the consequences of parasitism by the solitary ichneumonid endoparasitoid Campoletis sonorensis (Cameron) towards the replication, genetic composition and virulence of a nucleopolyhedrovirus (Baculoviridae) originating from Spodoptera frugiperda (J. E. Smith) larvae. Parasitism by C. sonorensis and viral infection of third and fourth instar S. frugiperda larvae resulted in reduced growth compared with nonparasitized control larvae. A positive correlation was observed between virus yield and larval instar at the moment of infection. When larvae were virus-inoculated in the fourth instar, parasitism resulted in a significant reduction in mean per capita virus yield compared to the virus yield from nonparasitized larvae. In an experiment involving 10 serial passages of virus in both parasitized and nonparasitized larvae, restriction endonuclease analysis of viral DNA amplified in nonparasitized larvae revealed the presence of the wild-type virus as well as three additional variants (A, B, and C) diagnosed by the presence of novel submolar PstI fragments of different sizes. In contrast, analysis of viral DNA from parasitized larvae showed the presence of the wild-type virus and two other variants (E and F), each characterized by a different submolar BglII fragment. Southern blot analysis indicated that the submolar fragments of variants E and F contained sequences originating from the viral genome. Bioassay of the different virus variants in S. frugiperda larvae indicated that their virulence was equal or less than that of the wild-type virus. We conclude that parasitism can affect the quantity of virus produced in dually infected and parasitized larvae, but no adverse effects were detected in terms of the biological activity of the virus MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0013-8703 UR - ISI:000165127900003 L2 - fall armyworm;baculovirus;serial passage;virulence;genotypic variants;per capita virus production;NUCLEAR POLYHEDROSIS-VIRUS; AGROTIS-SEGETUM LARVAE; GRANULOSIS-VIRUS; GENOTYPIC VARIANTS; FALL ARMYWORM; LEPIDOPTERA; NOCTUIDAE; EXIGUA; BACULOVIRUS; BRASSICAE SO - Entomologia Experimentalis et Applicata 2000 ;97(3):257-264 612 UI - 14935 AU - Escribano A AU - Williams T AU - Goulson D AU - Cave RD AU - Caballero P AD - Univ Publ Navarra, Dept Agr Prod, Lab Entomol Agr & Patol Insectos, Pamplona 31006, SpainECOSUR, Tapachula 30700, Chiapas, MexicoUniv Southampton, Sch Biol Sci, Southampton SO16 7PX, Hants, EnglandEscuela Agr Panamer, Dept Protecc Vegetal, El Zamorano, HondurasCaballero, P, Univ Publ Navarra, Dept Agr Prod, Lab Entomol Agr & Patol Insectos, Pamplona 31006, Spain TI - Parasitoid-pathogen-pest interactions of Chelonus insularis, Campoletis sonorensis, and a nucleopolyhedrovirus in Spodoptera frugiperda larvae AB - In this study we examined interactions between two solitary endoparasitoids, the braconid Chelonus insularis and the ichneumonid Campoletis sonorensis, and a multiple-enveloped nucleopolyhedrovirus infecting Spodoptera frugiperda larvae. We examined whether ovipositing females minimize interference by discriminating amongst hosts and examined the outcome of within-host competition between parasitoid species and between the parasitoids and the virus. The egg-larval parasitoid Ch, insularis did not discriminate between virus-contaminated and uncontaminated S. frugiperda eggs; all S. frugiperda larvae that emerged from surface-contaminated eggs died of viral infection prior to parasitoid emergence. The larval parasitoid C, sonorensis also failed to discriminate between healthy and virus-infected S, frugiperda larvae or between larvae unparasitized or parasitized by Ch. insularis. Host larvae parasitized in the egg stage by Ch. insularis were suitable for the development of C. sonorensis when they were multiparasitized by C, sonorensis as first, second, third, and fourth instars, whereas emergence of Ch. insularis was dramatically reduced (by 85 to 100%) in multiparasitized hosts, Nonspecific host mortality was significantly higher in multiparasitized hosts than in singly parasitized hosts, The development time and sex ratio of C. sonorensis in multiparasitized host larvae were unaffected by the presence of Ch. insularis larval stages, Both Ch. insularis parasitized and nonparasitized larvae of the same instar (second, third, or fourth instars) had a similar quantitative response to a challenge of virus inoculum, All host larvae that ingested a lethal dose of virus were unsuitable for Ch. insularis development, In contrast, C. sonorensis did not survive in hosts that ingested a lethal virus dose immediately after parasitism, but parasitoid survival was possible with a 2-day delay between parasitism and viral infection and the percentage of parasitoid emergence increased significantly as the interval between parasitism and viral infection increased, The development time of C, sonorensis was significantly reduced in virus-infected hosts compared to conspecifics that developed in healthy hosts, C. sonorensis females that oviposited in virus-infected hosts did not transmit the virus to healthy hosts that were parasitized subsequently. Field applications of virus for biocontrol of S. frugiperda may lead to substantial mortality of immature parasitoids, although field experiments have not yet demonstrated such an effect. (C) 2000 Academic Press MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000165229100009 L2 - fall armyworm;multiple parasitism;parasitism;baculovirus;nucleopolyhedrovirus;interference;interspecific competition;NUCLEAR POLYHEDROSIS-VIRUS; FALL ARMYWORM LEPIDOPTERA; AGROTIS-SEGETUM LARVAE; APANTELES-GLOMERATUS; GRANULOSIS-VIRUS; HELIOTHIS-VIRESCENS; HOST INTERACTIONS; PIERIS-BRASSICAE; NATURAL ENEMIES; NOCTUIDAE SO - Biological Control 2000 ;19(3):265-273 613 UI - 16558 AU - Esparza J AU - Fox C AU - Harper IT AU - Bennett PH AU - Schulz LO AU - Valencia ME AU - Ravussin E AD - Ctr Invest Alimentac & Desarrollo, Hermosillo, Sonora, MexicoNIDDK, Phoenix Epidemiol & Clin Res Branch, NIH, Phoenix, AZ, USAUniv Wisconsin, Milwaukee, WI 53201, USARavussin, E, Lilly Corp Ctr, Lilly Res Labs, Endocrine Res, Drop Code 0545, Indianapolis, IN 46285 USA TI - Daily energy expenditure in Mexican and USA Pima Indians: low physical activity as a possible cause of obesity AB - BACKGROUND: Obesity is caused by an imbalance between energy intake and energy expenditure. However, it is unknown whether increased physical activity protects susceptible populations against the development of obesity and type 2 diabetes. OBJECTIVE: To investigate the potential protective role of environment and physical activity against obesity by measuring total energy expenditure in Mexican and USA Pima Indians. METHODS: We compared the physical activity level of 40 (17 female and 23 male; 37 +/- 11 y, 66 +/- 13 kg) Mexican Pima Indians from a remote, mountainous area of Northwest Mexico, with 40 age-and-sex matched (17 female and 23 male; 37 +/- 12 y, 93 +/- 22 kg) Pima Indians from the Gila River Indian Community in Arizona, USA. We measured total energy expenditure (TEE) by doubly labeled water and calculated physical activity by different methods: physical activity level (PAL) as the ratio of TEE on resting metabolic rate (RMR), TEE adjusted for RMR by linear regression, activity energy expenditure adjusted for body weight (AEE), and activity questionnaire. RESULTS: Physical activity was higher in Mexican Pima Indians when compared with USA Pima Indians as assessed by PAL (1.97 +/- 0.34 vs 1.57 +/- 0.16, P < 0.0001), TEE adjusted for RMR (3289 +/- 454 vs 2671 +/- 454 kcal/day, P < 0.0001) and AEE adjusted for body weight (1243 +/- 415 vs 711 +/- 415 kcal/day, P < 0.0001). Questionnaires revealed more time spent on occupational activities among Mexican Pima compared with USA Pima (23.9 +/- 13.3 vs 12.6 +/- 13.9h/week, P < 0.001). CONCLUSION: These data support a significant role for physical activity in the prevention of obesity in genetically susceptible populations MH - USA MH - Mexico|Sonora PB - BASINGSTOKE: STOCKTON PRESS RP - NOT IN FILE U3 - TC 43 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 0307-0565 UR - ISI:000085173100009 L2 - Pima Indians;doubly labeled water;total energy expenditure;resting metabolic rate;physical activity level;DOUBLY LABELED WATER; 5-YEAR-OLD CHILDREN; BODY-COMPOSITION; FAT DISTRIBUTION; METABOLIC-RATE; DIET; WEIGHT; MANAGEMENT; VALIDATION; WOMEN SO - International Journal of Obesity 2000 ;24(1):55-59 614 UI - 16298 AU - Espina S AU - Salibian A AU - Diaz F AD - Univ Nacl Lujan, Dept Ciencias Basicas, Programa Ecofisiol Aplicada, RA-6700 Lujan, ArgentinaCtr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Ensenada, Baja California, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Dept Biol, Lab Ecofisiol, Mexico City 04510, DF, MexicoDiaz, F, CICESE, Dept Acuicultura, POB 434844, San Diego, CA 92143, USA TI - Influence of cadmium on the respiratory function of the grass carp Ctenopharyngodon idella AB - The effect of 96 h exposure to sublethal cadmium concentrations on oxygen consumption rate (VO2 mg h(-1)) and oxygen extraction efficiency (OEE' %) was determined in juvenile Ctenopharyngodon idella acclimated to 26, 29 and 32 degrees C for at least two weeks. The relationships among the physiological rates (VO2 and OEE', body weight and temperature, were fitted by second order polynomial models; the response surfaces generated allowed the evaluation of stress induced by the interaction of those variables. Both VO2 and OEE' invariably increased as temperature increased. In small animals kept in 0.5 mg Cd L-1, the VO2 increase was compensated by a proportional increase in OEE', whereas in larger fishes (> 1 g) no compensatory response was observed. Both small and large fishes were unable to compensate for a higher VO2 when exposed to higher cadmium concentration. It is concluded that OEE' in young fish is an early response of stress due to sublethal cadmium exposure MH - Argentina MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000086037300001 L2 - cadmium;Ctenopharyngodon idella;respiratory function;surface response;TEMPERATURE; METALS SO - Water Air and Soil Pollution 2000 ;119(1-4):1-10 615 UI - 15642 AU - Espindola JM AU - Macias JL AU - Tilling RI AU - Sheridan MF AD - UNAM, Inst Geofis, Mexico City 04510, DF, MexicoUS Geol Survey, Menlo Park, CA 94025, USASUNY Buffalo, Dept Geol, Buffalo, NY 14260, USAEspindola, JM, UNAM, Inst Geofis, Coyoacan 04510,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Volcanic history of El Chichon Volcano (Chiapas, Mexico) during the Holocene, and its impact on human activity AB - Before its devastating eruption in 1982, El Chichon Volcano was little known and did not appear on any listings of hazardous volcanoes. Subsequent geologic studies, based on stratigraphic and radiocarbon investigations, showed that at least three explosive eruptions had occurred previously at this volcano. In this paper, we present the result of recent studies on the stratigraphy of the volcano and new radiocarbon ages which show that at least 11 eruptions have taken place at El Chichon in the past 8000 years. Explosive events, most of them producing block-and-ash flow and surge deposits, occurred around 550, 900, 1250, 1500, 1600, 1900, 2000, 2500, 3100, 3700 and 7700 years BP. The juvenile products of these eruptions have a trachyandesitic composition with similar degree of evolution, as evidenced from their SiO2 abundance and depletion in MgO, CaO, TiO2, as well as trace and rare earth elements. This suggests segregation of olivine and orthopyroxene from the melt. Since human settlements in southeast Mexico and Central America can be traced as far back as approximately 2500 years BP, most of these events probably affected human activity. In fact, there are reports of pottery shards and other artifacts in deposits from the eruption of 1250 BP. Pottery fragments in deposits of an eruption that took place 2500 BP are also reported in this paper. Thus, the impact of the volcano on human activities has been frequent, with most of the repose intervals lasting between 100 to 600 years. The impact of the eruptions was probably of greater than local extent, because airfall tephra could reach distant sites and possibly even affect weather. The eruptive history of El Chichon also offers clues in the investigation of the Maya civilization. Several researchers have considered the volcano as an important factor in the answer to some intriguing questions such as the extensive use of volcanic ash in Late Classic Maya ceramics or, of greater importance, the causes of the collapse of the Classic Maya civilization MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000088235600002 L2 - stratigraphy;evolution;El Chichon;Mexico;1982 ERUPTIONS; DEPOSITS; ASH SO - Bulletin of Volcanology 2000 ;62(2):90-104 616 UI - 15202 AU - Espinosa-Garcia MT AU - Strauss JF AU - Martinez F AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Penn, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAEspinosa-Garcia, MT, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Apartado Postal 70-159, Mexico City 04510, DF, Mexico TI - A trypsin-sensitive protein is required for utilization of exogenous cholesterol for pregnenolone synthesis by placental mitochondria AB - The utilization of cholesterol for steroid hormone synthesis by human placental mitochondria is poorly understood. The human placenta does not express the steroidogenic acute regulator protein, which is critical for cholesterol delivery to the cholesterol side chain cleavage system in adrenal and gonadal mitochondria. We explored the mechanism underlying cholesterol transport in human placental mitochondria by measuring its transformation into pregnenolone. Mitochondria of syncytiotrophoblast from human term placenta were isolated by centrifugation through a sucrose gradient. The synthesis of pregnenolone in the presence of exogenous cholesterol was increased two-fold in syncytiotrophoblast mitochondria. Treatment of mitochondria with trypsin prevented the increase in the synthesis of pregnenolone in the presence of exogenous cholesterol. However, when 22-OH cholesterol, a substrate that readily crosses membranes, was added, the trypsin-treated mitochondria synthesized increased amounts of pregnenolone. The trypsin-treated mitochondria were intact, since oxygen consumption, succinate dehydrogenase and the adenine nucleotide translocase activities were not significantly different from in untreated mitochondria. However, activity of NADH cytochrome c oxidoreductase, an outer mitochondrial membrane enzyme, was reduced in the trypsin-treated mitochondria, reflecting the selective degradation of proteins. In addition, SDS-PAGE analysis revealed the loss of a prominent 34 kDa band which proved to be a novel porin-like protein that binds to cholesterol. These results support our previous assumption that human placental mitochondria employ a novel protein(s)-mediated the mechanism to take up cholesterol for steroidogenesis. (C) 2000 Harcourt Publishers Ltd MH - Mexico|Distrito Federal MH - USA PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 5 U4 - Developmental Biology;Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0143-4004 UR - ISI:000089463100009 L2 - ACUTE REGULATORY PROTEIN; LEYDIG TUMOR-CELLS; STEROID-HORMONE BIOSYNTHESIS; CARRIER PROTEIN-2; STEROIDOGENESIS; STAR; EXPRESSION; MEMBRANES; PRECURSORS; CLEAVAGE SO - Placenta 2000 ;21(7):654-660 617 UI - 16474 AU - Espinosa-Victoria D AU - Vance CP AU - Graham PH AD - Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108, USAUniv Minnesota, USDA ARS, St Paul, MN 55108, USAColegio Postgrad, Programa Edafol, Montecillo, MexicoGraham, PH, Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USA TI - Host variation in traits associated with crown nodule senescence in soybean AB - Active N-2 fixation in soybean [Glycine max (L.) Merr.] in Minnesota is limited by cool early-season soil temperatures and by postflowering nodule senescence. This study examined variation in onset of nodule senescence among Maturity Group I soybean cultivars and sought traits associated with this variation. Host genotype markedly affected onset of crown nodule senescence. For most cultivars, crown nodule fresh weight and specific nodule activity (SNA) peaked 31 to 38 d after emergence (DAE) and declined rapidly thereafter. In contrast, maximum crown nodule fresh weight in 'Hardin' and 'Hodgson 78' did not occur until 52 DAE, and SNA was stilt high 45 to 52 DAE. Two cultivars, Chippewa and Alpha, that exhibited early change in crown nodule mass and SNA, accumulated glyceollin I 10 to 45 DAE at rates significantly greater than for Hardin and Hodgson 78. The four cultivars also differed in phenylalanine ammonia lyase (PAL) and chalcone synthase (CHS) gene expression, nodule protease activity, and polyamine accumulation. Morphological changes within the nodule paralleled the biochemical differences, with Chippewa nodules 45 DAE showing more conspicuous deterioration than was evident in Hardin, Because crown-nodule mass and nitrogenase activity in Hardin and Hodgson 78 declined later than in other Maturity Group I cultivars, with less evidence of host-strain incompatibility, these two lines may have value in breeding programs to extend the period of active nodulation and N-2 fixation in soybean MH - USA MH - Mexico|Estado De Mexico PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000085505300019 L2 - MEDICAGO-SATIVA L; BRADYRHIZOBIUM-JAPONICUM; NITROGEN-FIXATION; DINITROGEN FIXATION; GENETIC-VARIATION; EARLY NODULATION; ROOT-NODULES; ACCUMULATION; GLYCEOLLIN; ALFALFA SO - Crop Science 2000 ;40(1):103-109 618 UI - 15734 AU - Espinosa F AU - Lopez-Gonzalez I AU - Munoz-Garay C AU - Felix R AU - de la Vega-Beltran J AU - Kopf GS AU - Visconti PE AU - Darszon A AD - UNAM, Inst Biotechnol, Dept Genet & Mol Physiol, Cuernavaca, Morelos, MexicoIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07738, DF, MexicoUniv Penn, Med Ctr, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAUniv Virginia, Dept Anat & Cell Biol, Charlottesville, VA, USADarszon, A, UNAM, Inst Biotechnol, Dept Genet & Mol Physiol, Ave Univ 2001,Col Chamilpa,POB 62100, Cuernavaca, Morelos, Mexico TI - Dual regulation of the T-type Ca2+ current by serum albumin and beta-estradiol in mammalian spermatogenic cells AB - This study provides evidence for a novel mechanism of voltage-gated Ca2+ channel regulation in mammalian spermatogenic cells by two, agents that affect sperm capacitation and the acrosome reaction (AR), Patch-clamp experiments demonstrated that serum albumin induced an increase in Ca2+ T current density in a concentration-dependent manner, and significant shifts in the voltage dependence of both steady-state activation and inactivation of the channels. These actions were not related to the ability of albumin to remove cholesterol from the membrane. In contrast, P-estradiol significantly inhibited Ca2+ channel activity in a concentration-dependent and essentially voltage-independent fashion. In mature sperm this dual regulation may influence capacitation and/or the AR. (C) 2000 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000087931700020 L2 - T-Ca2+ channel;spermatogenic cell;serum albumin;bovine serum albumin;beta-estradiol;sperm capacitation;PROTEIN-TYROSINE PHOSPHORYLATION; SMOOTH-MUSCLE CELLS; MOUSE SPERMATOZOA; SPERM MEMBRANE; CAPACITATION; CHANNELS; INHIBITION; RELAXATION; MECHANISM; RECEPTOR SO - Febs Letters 2000 ;475(3):251-256 619 UI - 14595 AU - Espinosa G AU - Del Angel G AU - Barbier J AU - Bosch P AU - Lara V AU - Acosta D AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Poitiers, LACCO, Unite Rech Associee CNRSDO 350, F-86022 Poitiers, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoEspinosa, G, Inst Mexicano Petr, Apdo Postal 14-805,Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Catalytic behavior and active sites structure of PtAu/Al2O3 bimetallic catalysts prepared by surface redox reactions AB - Alumina supported Pt-Au bimetallic catalysts, in which Au was deposited onto Pt by reduction of AuCL4- with adsorbed hydrogen, were studied using hydrogen TPD and X-ray diffraction. Their catalytic behavior was tested in methylcyclopentane reaction. The gold inhibits the hydrogen adsorption indicating that gold atoms are deposited on platinum sites. In methylcyclopentane reaction, the catalysts containing the largest amounts of Au, promoted the formation of dehydrogenation products although in conversions very low. However, the environmental conditions or oxidation treatments irreversibly affect the catalytic behavior in these systems, suggesting a rearrangement of the metallic sites created by the redox reaction. This rearrangement effect was investigated by X-ray diffraction and by high resolution electron microscopy (HREM) studies. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000166078400028 L2 - bimetallic catalysts;catalyst preparation (reduction);platinum-gold/alumina;methylcyclopentane reaction;surface redox reaction;REFORMING CATALYSTS; SUPPORTED PLATINUM; ALLOYS; SELECTIVITY; CONVERSION SO - Journal of Molecular Catalysis A-Chemical 2000 ;164(1-2):253-262 620 UI - 14671 AU - Espinosa JE AU - Navarro O AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoBUAP, Fac Ciencias Fis Matemat, Posgrado Optoelect, Puebla 72570, MexicoBUAP, Inst Fis, Puebla 72570, MexicoCNRS, LEPES, F-38042 Grenoble 9, FranceEspinosa, JE, Univ Nacl Autonoma Mexico, Inst Invest Mat, AP 70-360, Mexico City 04510, DF, Mexico TI - Pairing of three holes in a one-dimensional lattice within the generalized Hubbard model AB - Within the generalized Hubbard model, the pairing problem of a system of three correlated holes in a one-dimensional lattice is studied. This study has been done by extending the previously reported real-space mapping method [1], in order to incorporate the bond-charge interactions, The system is solved in a non-perturbative way for different values of the hopping parameters as well as the on-site (U) and nearest-neighbor (V) interaction. It is found an electron-hole pairing asymmetry, contrary to that for a bipartite lattice We also obtained, for some values of the Hubbard parameters, that the hole-singlet pairing is not always stronger than the electron case, in contrast with that for a non-bipartite lattice like the triangular one MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855500077 L2 - BOND-CHARGE INTERACTION; SUPERCONDUCTIVITY SO - Physica C 2000 ;341():241-242 621 UI - 14843 AU - Espinosa JE AU - Navarro O AU - Avignon M AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoBUAP, Fac Ciencias Fisicomath Posgrado Optoelect, Puebla, MexicoBUAP, Inst Fis, Puebla, MexicoCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, FranceEspinosa, JE, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Non perturbative calculations for three particles in a linear chain within the generalized Hubbard model AB - A real-space method has been introduced to study the pairing problem within the generalized Hubbard Hamiltonian. This method includes the bond-charge interaction term as an extension of the previously proposed mapping method [1] for the Hubbard model. The generalization of the method is based on mapping the correlated many-body problem onto an equivalent site- and bond-impurity tight-binding one in a higher dimensional space, where the problem can be solved exactly. In a one-dimensional lattice, we analyzed the three particle correlation by calculating the binding energy at the ground state, using different values of the bond-charge, the on-site (U) and the nearest-neighbor (V) interactions. A pairing asymmetry is found between electrons and holes for the generalized hopping amplitude, where the hole pairing is not always easier than the electron case. For some special values of the hopping parameters and for all kinds of interactions in the Hubbard Hamiltonian, an analytical solution is obtained MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000165443800002 L2 - BOND-CHARGE INTERACTION; OXYGEN HOLE METAL; CORRELATED ELECTRONS; HOPPING RATE; SUPERCONDUCTIVITY; STATE; TRANSITION; LATTICE; SYSTEMS SO - European Physical Journal B 2000 ;18(1):9-16 622 UI - 15343 AU - Esposito A AU - Ezin EC AU - Reyes-Garcia CA AD - Int Inst Adv Sci Studies, I-84019 Vietri Sul Mare, SA, ItalyInst Math & Sci Phys, Porto Novo, BeninInst Tecnol Apizaco, COSNET, Tlaxcala 90300, MexicoEsposito, A, Int Inst Adv Sci Studies, VBia G Pellegrino 19, I-84019 Vietri Sul Mare, SA, Italy TI - Designing a fast neuro-fuzzy system for speech noise cancellation AB - Noise canceling is an adaptive interference filtering technique that has shown to be highly adventageous in many applications where fixed filters are not efficient. We present an experimental neuro-fuzzy inference system, based on the ANFIS architecture, which has been implemented with the objective to perform nonlinear adaptive noise cancellation from speech. The novelty of the system described in the present paper, with respect to our previous work, consists in a different set up, which requires two inputs with seven membership functions each, and uses a second order sinc function to generate the nonlinear distortion of the noise. This set up allows a better generalization to the system for learning the noise features. Indeed, the system was trained only once during few epochs, with a sample of babble noise, but it was able to clean speech sentences corrupted not only with the same noise, but also with car, traffic, and white noise. The average improvement, in terms of SNR, was 37 dB without further training, resulting in a great reduction of the computational time MH - Benin MH - Italy MH - Mexico|Tlaxcala PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000088970800044 L2 - neuro-fuzzy system;ANFIS;adaptive noise cancellation;signal to noise ratio;passage dynamics SO - Micai 2000: Advances in Artificial Intelligence, Proceedings 2000 ;1793():482-492 623 UI - 14594 AU - Esquivel-Macias C AU - Ausich WI AU - Buitron-Sanchez BE AU - de Dios AF AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoOhio State Univ, Dept Geol Sci, Columbus, OH 43210, USAEsquivel-Macias, C, Univ Nacl Autonoma Mexico, Inst Geol, Cd Univ Delegac Coyoacan, Mexico City 04510, DF, Mexico TI - Pennsylvanian and Mississippian pluricolumnal assemblages (class Crinoidea) from southern Mexico and a new occurrence of a column with a tetralobate lumen MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 5 U4 - Paleontology U5 - J;Article AV - English IS - 0022-3360 UR - ISI:000166151500018 SO - Journal of Paleontology 2000 ;74(6):1187-1190 624 UI - 15676 AU - Esteves PM AU - Alberto GGP AU - Ramirez-Solis A AU - Mota CJA AD - Univ Fed Rio de Janeiro, Dept Quim Organ, Inst Quim, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoMota, CJA, Univ Fed Rio de Janeiro, Dept Quim Organ, Inst Quim, Cidade Univ CT Bloco A, BR-21949900 Rio De Janeiro, Brazil TI - The n-butonium cation (n-C4H11+): The potential energy surface of protonated n-butane AB - The structure and energetics of the n-butonium ion, the protonated form of n-butane, were computed at the MP4SDTQ(fc)/6-311++G**//MP2(full)/6-31G** level. Eleven stable structures were found for the n-butonium ion, following the stability order 2-C-n-butonium > 1-C-n-butonium > 2-H-n-butonium > 1-H-n-butonium. The transition states for intramolecular bond-to-bond rearrangement and for decomposition of the carbonium ions into the van der Waals complexes were also calculated. The H-n-butonium and the 1-C-n-butonium ions are higher in energy than the van der Waals complexes 13, 14, and 15. The van der Waals complexes between the isopropyl cation plus CH4 and the tert-butyl cation plus H-2 are the most stable C4H11+ species. It was concluded that the 1-H-n-butonium ion prefers to undergo intramolecular rearrangement to the 1-C-n-butonium ion, whereas the 2-H-n-butonium ion prefers to decompose into the van der Waals complex of the sec-butyl cation plus H-2. The calculated proton affinity of n-butane (156.7 kcal/mol) agrees well with the experimental value of 153.7 kcal/mol. The C4H11+ (b) species, formed upon the gas-phase reaction between C2H5+ and ethane, was confirmed to be the 2-C-n-butonium cation, and the C4H11+ (a) species was confirmed to be the 2-H-n-butonium cation, as proposed by Hiraoka and Kebarle (Can. J. Chem. 1980, 58, 2262-2270). The experimental activation energy of 9.6 kcal/mol was compared with the value of 12.8 kcal/mol, computed for the reaction 11 --> 5 through the transition state 21 MH - Brazil MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000088057000016 L2 - THEORETICAL AB-INITIO; CARBONIUM-IONS; ELECTRONIC-STRUCTURE; ELECTROPHILIC REACTIONS; INFRARED-SPECTROSCOPY; MOLECULAR-HYDROGEN; SINGLE BONDS; CH5+; C2H7+; REARRANGEMENT SO - Journal of Physical Chemistry A 2000 ;104(26):6233-6240 625 UI - 15255 AU - Estevez JM AU - Cantero A AU - Romero C AU - Kawaide H AU - Jimenez LF AU - Kuzuyama T AU - Seto H AU - Kamiya Y AU - Leon P AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoRIKEN, Inst Phys & Chem Res, Frontier Res Program, Wako, Saitama 3510198, JapanUniv Nacl Autonoma Mexico, Fac Ciencias, Lab Microscopia Electron, Mexico City 04510, DF, MexicoUniv Tokyo, Inst Mol & Cellular Biosci, Bunkyo Ku, Tokyo 1130032, JapanLeon, P, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Ave Univ 2001 Chamilpa,Apdo Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - Analysis of the expression of CLA1, a gene that encodes the 1-deoxyxylulose 5-phosphate synthase of the 2-C-methyl-D-erythritol-4-phosphate pathway in Arabidopsis AB - The discovery of the 2-C-methyl-D-erythritol-4-phosphate pathway for the biosynthesis of isoprenoids raises the important question of the nature and regulation of the enzymes involved in this pathway. CLA1, a gene previously isolated from Arabidopsis, encodes the first enzyme of the 2-C-methyl-d-erythritol-4-phosphate pathway, 1-deoxy-d-xylulose-5-phosphate synthase. We demonstrate this enzyme activity by complementation of the cla1-1 mutant phenotype and by direct enzymatic assays. Based on mRNA and protein expression patterns this enzyme is expressed mainly in developing photosynthetic and non-photosynthetic tissues. The beta-glucuronidase expression pattern driven from the CLA1. gene regulatory region supports the northern and protein data while also showing that this gene has some level of expression in most tissues of the plant. A mutation in the CLA1 gene interferes with the normal development of chloroplasts and etioplasts, but does not seem to affect amyloplast structure. Microscopic analysis also shows a pleiotropic effect of the CLA1 gene mutation in mesophyll tissue formation MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - ROCKVILLE: AMER SOC PLANT PHYSIOLOGISTS RP - NOT IN FILE U3 - TC 74 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000089306200011 L2 - MEVALONATE-INDEPENDENT PATHWAY; HIGHER-PLANT CHLOROPLASTS; ISOPRENOID BIOSYNTHESIS; ESCHERICHIA-COLI; TERPENOID BIOSYNTHESIS; 1-DEOXY-D-XYLULOSE-5-PHOSPHATE REDUCTOISOMERASE; HETEROLOGOUS EXPRESSION; PYRIDOXOL; THIAMIN; CLONING SO - Plant Physiology 2000 ;124(1):95-103 626 UI - 15031 AU - Estrada A AU - Cammarano P AU - Coates-Estrada R AD - Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol, San Andres Tuxtla, Veracruz, MexicoUniv Milan, Dipartimento Biol, Milan, ItalyEstrada, A, Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol, Apartado Postal 176, San Andres Tuxtla, Veracruz, Mexico TI - Bird species richness in vegetation fences and in strips of residual rain forest vegetation at Los Tuxtlas, Mexico AB - Fragmentation of the lowland tropical rain forest has resulted in loss of animal and plant species and isolation of remaining populations that puts them at risk. At Los Tuxtlas, Mexico, lowland rain forests are particularly diverse in the avian fauna they contain and while most of the forests have been fragmented by human activity, many of the fragments still harbor diverse assemblages of bird species. In these landscapes, linear strips of residual rain forest vegetation along streams as well as linear strips of vegetation fences (live fences) crossing the pastures might provide some connectivity to bird populations existed in forest fragments. We investigated bird species richness and relative abundance in one 6-km long section of live fences (LF) bordering a dirt road and in two 6-km long sections of residual forest vegetation along a river (MR) and one permanent stream (BS). We used point count procedures which resulted in the count of 2984 birds representing 133 species. At the LF site we detected 74% of the species, 72% at the BS site and 57% at the MR site. Only 38% of the species were common among sites. Neotropical migratory birds accounted for 34-41% of the species counted at all sites. While edge and open habitat birds accounted for 6-10% of the species and for 50% of the records at the three vegetation strips, about 90% of the species were forest birds. Distance to forest fragments and degree of disturbance of the vegetation seemed to negatively influence bird species presence at the BS and MR strips. Rarefaction analysis indicated that the LF strip was richer in species than the other two sites, but the occurrence of the three vegetation strips in the landscape seem to favor the presence of many more species. We discuss the value of these vegetation strips to birds as stepping stones in the fragmented landscape MH - Italy MH - Mexico|Veracruz PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 26 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000089974900004 L2 - bird diversity;conservation;corridors;forest fragmentation;Los Tuxtlas;Mexico;tropical rain forests;AGRICULTURAL HABITATS; LANDSCAPE CHANGES; FRAGMENTS; MOVEMENT SO - Biodiversity and Conservation 2000 ;9(10):1399-1416 627 UI - 15001 AU - Estrada M AU - Cerdeira A AU - Pereyra I AU - Soto S AD - CINVESTAV, SEES, Dept Ingn Elect, Mexico City 07300, DF, MexicoUniv Sao Paulo, Microelect Lab, Sao Paulo, BrazilEstrada, M, CINVESTAV, SEES, Dept Ingn Elect, Av Inst Politecn Nacl 2508, Mexico City 07300, DF, Mexico TI - High deposition rate a-Si : H layers from pure SiH4 and from a 10% dilution of SiH4 in H-2 AB - In this paper, we present the results on deposition rates and characterization of a-Si:H layers deposited from pure SIR, in 13.56-MHz plasma enhanced chemical vapor deposition (PECVD) equipment, where the use of parallel plates of equal area, long gas residence as well as the optimization of process parameters doubled the previously reported deposition rates for this r.f. frequency and gas. A deposition process using a 10% dilution of SiH4 in H-2 was also optimized to increase the deposition rate to 1.5 mum/h. I-V and I-T curves of PIN diodes up to 18 mum thick fabricated on these high deposition rate a-Si:H layers were characterized. The density of ionized states at deep depletion were determined and compared with those obtained for diodes fabricated with other standard and high deposition rate methods. (C) 2000 Elsevier Science S.A. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900039 L2 - plasma processing and deposition;amorphous materials;silicon;SILICON; HYDROGEN; SILANE SO - Thin Solid Films 2000 ;373(1-2):176-179 628 UI - 16329 AU - Estrada M AU - Cerdeira A AU - Pereyra I AU - Soto BS AD - CINVESTAV, SEES, Dept Ingn Elect, Mexico City 07300, DF, MexicoUniv Sao Paulo, Microelect Lab, Sao Paulo, BrazilEstrada, M, CINVESTAV, SEES, Dept Ingn Elect, Av Inst Politecn Nacl 2508, Mexico City 07300, DF, Mexico TI - Characteristics of high deposition rate pin diodes from pure SiH4 and 10% dilution of SiH4 in H-2 AB - In this paper, we present the results of the electrical characterization of PIN diodes up to 18 mu m thick fabricated on high deposition rates a-Si : H layers obtained from pure SiH4 and from a 10% dilution of SiH4 in H-2, using a 13.56 MHz plasma enhanced chemical vapor deposition (PECVD) with geometrical modifications in the plasma reactor, I-V and I-T curves were investigated, concluding that the changes introduced in the deposition reactor to increase the deposition rate did not affect the characteristics of the fabricated diodes. Results are compared with characteristics, reported for diodes obtained by standard and other high deposition late methods MH - Brazil MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nuclear Science & Technology U5 - J;Letter AV - English IS - 0018-9499 UR - ISI:000086070100006 L2 - amorphous devices;characterization;AMORPHOUS-SILICON; DETECTORS; HYDROGEN; SILANE SO - Ieee Transactions on Nuclear Science 2000 ;47(1):33-35 629 UI - 15775 AU - Estrada MB AU - Malabre M AD - Inst Politecn Nacl, CINVESTAV, Dept Automat Control, Mexico City 07000, DF, MexicoIRCCyN, CNRS, UMR 6597, F-44321 Nantes 03, FranceEstrada, MB, Inst Politecn Nacl, CINVESTAV, Dept Automat Control, AP 14-740, Mexico City 07000, DF, Mexico TI - Proportional and derivative state-feedback decoupling of linear systems AB - We consider here the row-by-row decoupling of linear time-invariant systems by proportional and derivative state feedback. Our contribution, with respect to previous results, is that our procedure is based on simple operator (say matrices) manipulations, without any need to use a canonical form. The only assumptions for applying such a decoupling strategy are that the system is right invertible (which is a necessary condition to ensure solvability) and minimum phase. An illustrative example is proposed MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000087820100014 L2 - decoupling;geometric approach;implicit systems;linear system theory;proportional and derivative feedback;MULTIVARIABLE SYSTEMS; OUTPUT-FEEDBACK SO - Ieee Transactions on Automatic Control 2000 ;45(4):730-733 630 UI - 15939 AU - Estrada MB AU - Rejon V AU - Castro-Rodriguez R AD - IPN, CINVESTAV, Unidad Zacatenco, Dept Automat Control, Mexico City 07000, DF, MexicoIPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, VenezuelaEstrada, MB, IPN, CINVESTAV, Unidad Zacatenco, Dept Automat Control, AP 14-740, Mexico City 07000, DF, Mexico TI - Implicit linear control law of a close-spaced vapor transport process AB - In this paper a linear control scheme for a close-spaced vapor transport process to obtain thin film semiconductors is presented. This linear control scheme is composed of two linear control laws. The inner controller is an implicit control law whose aim is to transform the system into a linear time-invariant system without disturbances. The outer controller is a classical PI control law, whose aim is to make the error tend towards zero. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0967-0661 UR - ISI:000087350600007 L2 - temperature process;thin films semiconductors;modeling and control of semiconductor process RTP;CSVT;implicit systems;PI controllers;FILMS SO - Control Engineering Practice 2000 ;8(5):569-579 631 UI - 14835 AU - Eubank PT AU - Lamonte BG AU - Alvarado JFJ AD - Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoEubank, PT, Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USA TI - Consistency tests for binary VLE data AB - Many VLE data papers are published each year for binary systems at either constant temperature or constant pressure. This manuscript examines consistency checks via Gibbs-Duhem equations and finds most powerful a two-step method that (1) uses a combination of the liquid and vapor Gibbs-Duhem equations to first check the internal consistency of (P, y, x) at constant temperature or (T, y, x) at constant; pressure and (2) then uses the liquid-side Gibbs-Duhem equation to check the liquid-phase activity coefficients in a test more familiar to most workers. A new graphical method is developed in conjunction with step 1. The role of the assumed gas-phase model is examined. The common problem of published data of the activity coefficient of the solvent falling slightly under unity upon approaching the pure solvent end on the familiar In gamma (i) versus x(1) diagram is explained as an artifact of usual data reduction procedures but corrected by the present procedures MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000165423400013 L2 - VAPOR-LIQUID-EQUILIBRIA; 101.3 KPA; PLUS METHANOL; SYSTEMS; 2-PROPANOL; ETHER SO - Journal of Chemical and Engineering Data 2000 ;45(6):1040-1048 632 UI - 15485 AU - Falcon LI AU - Vecchione M AU - Roper CFE AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 045510, DF, MexicoSmithsonian Inst, Natl Museum Nat Hist, Res Training Program, Washington, DC 20560, USANatl Museum Nat Hist, Natl Systemat Lab, Natl Marine Fisheries Serv, Washington, DC 20560, USASmithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool Mollusks, Washington, DC 20560, USAFalcon, LI, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Apdo Postal 70-305, Mexico City 045510, DF, Mexico TI - Paralarval gonatid squids (Cephalopoda : Oegopsida) from the Mid-North Atlantic Ocean AB - Ninety six gonatid cephalopod specimens (Oegopsida: Gonatidae) from the University of Amsterdam Mid-North Atlantic Plankton Expeditions were analyzed and two species were identified: Gonatus steenstrupi (Kristensen 1981) and Gonatus fabricii (Lichtenstein 1818). Gonatids were collected only in spring and summer, despite sampling in autumn and winter. This paper describes aspects of their development and reports their geographical distribution in the central North Atlantic Ocean. Chromatophore patterns were the most consistently useful characters for distinguishing between the species. Among 34 measurements, Tentacle Length (TtL) relative to Dorsal Mantle Length (ML) and number of suckers on Arms I-IV were useful for distinguishing specimens >13 mm ML. Both species develop hooks from suckers on the arms and tentacular clubs at ML >20 mm. Subtle differences were noted in the morphology of the funnel pads except in the smallest specimens. Specimens of G. steenstrupi >20 mm ML were collected at greater depths (250 to 995 m) than the smaller specimens (found at depths <200 m). Our data suggest that 20 mm ML is the point of transition between paralarvae and juveniles of G. steenstrupi, because specimens larger than 20 mm ML have well defined hooks, and a juvenile vertical distribution is established MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 3 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000088606000020 SO - Proceedings of the Biological Society of Washington 2000 ;113(2):532-541 633 UI - 16250 AU - Fall C AU - Chaouki J AU - Chavarie C AD - Univ Autonoma Estado Mexico, Toluca 50091, MexicoEcole Polytech, Dept Chem Engn, BIOPRO Res Ctr, Montreal, PQ H3C 3A7, CanadaFall, C, Univ Autonoma Estado Mexico, Apartado Postal 367, Toluca 50091, Mexico TI - Desorptive behavior of pentachlorophenol (PCP) and phenanthrene in soil-water systems AB - Recent investigations have prompted the need for a better understanding of the complete desorptive behavior of hydrophobic organic compounds in soils. The present study evaluated the irreversibilities associated with the desorption of pentachlorophenol (PCP) and phenanthrene from different types of soils. The study also examined the influence of solid-liquid ratio of the current batch desorption tests. specifically the completeness and accuracy of data gathered for establishing isotherms. Results demonstrated that the desorption of PCP and phenanthrene from contaminated soils can lead to three different types of behavior: complete reversibility, partial reversibility, or total irreversibility. The equilibrium adsorption constant (K-d) is identified as a key parameter that indirectly sets the extent of hysteresis during the reverse process of desorption. According to the data, irreversibility occurs more in soils with a large adsorption capacity, that is, when K-d is approximately 50 mL/g or more in the case of the phenanthrene- and PCP-soil systems evaluated. Furthermore, to facilitate the desorption experiments overall, the study proposes selection criteria for the solid-liquid ratio of batch tests to allow for variations in the adsorption capacity of each soil MH - Canada MH - Mexico|Estado De Mexico PB - ALEXANDRIA: WATER ENVIRONMENT FEDERATION RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Environmental;Environmental Sciences;Limnology;Water Resources U5 - J;Article AV - English IS - 1061-4303 UR - ISI:000086239900006 L2 - desorption;irreversibility;pentachlorophenol;PCP;phenanthrene;soils;solid-liquid ratio;ORGANIC-MATTER; ADSORPTION-DESORPTION; CONTAMINATED SOILS; SORPTION; SEDIMENTS; BIODEGRADATION; HYSTERESIS SO - Water Environment Research 2000 ;72(2):162-169 634 UI - 15936 AU - Farkas DR AU - Geiss C AU - Green EL AU - Marcos EN AD - Virginia Polytech Inst & State Univ, Dept Math, Blacksburg, VA 24061, USAUNAM, Inst Matemat, Mexico City 04510, DF, MexicoUniv Sao Paulo, Dept Matemat, IME, BR-05389970 Sao Paulo, BrazilFarkas, DR, Virginia Polytech Inst & State Univ, Dept Math, Blacksburg, VA 24061 USA TI - Diagonalizable derivations of finite-dimensional algebras I AB - Diagonalizable derivations of a finite-dimensional algebra usually span an ideal in the Lie algebra of all derivations. This ideal is studied for underlying graded, monomial, and path algebras MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - JERUSALEM: MAGNES PRESS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-2172 UR - ISI:000087389400009 SO - Israel Journal of Mathematics 2000 ;117():157-181 635 UI - 15310 AU - Farkas T AU - Jiang X AU - Guerrero ML AU - Zhong WM AU - Wilton N AU - Berke T AU - Matson DO AU - Pickering LK AU - Ruiz-Palacios G AD - Eastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23510, USAChildrens Hosp Kings Daughters, Ctr Pediat Res, Norfolk, VA 23510, USAInst Nutr, Dept Infect Dis, Mexico City, DF, MexicoJiang, X, Eastern Virginia Med Sch, Ctr Pediat Res, 855 W Brambleton Ave, Norfolk, VA 23510 USA TI - Prevalence and genetic diversity of human caliciviruses (HuCVs) in Mexican children AB - Human caliciviruses (HuCVs) contain two genera: "Norwalk-like viruses" (NLVs) and "Sapporo-like viruses" (SLVs). The importance of the two genera as a cause of acute gastroenteritis of infants and children remains unknown. Beginning in 1989, a birth cohort of children in Mexico was enrolled and monitored for acute gastroenteritis. A subset of 115 diarrhea stool specimens from 76 children and 66 non-diarrhea stool specimens from 64 children was examined for HuCVs by RT-PCR by using a primer pair (p289/290) that detects both NLVs and SLVs. Twenty-two (19%) of the 115 diarrhea stool specimens and 5 (7%) of 66 non-diarrhea stool specimens produced RT-PCR products of expected size (319 bp for NLVs and 331 bp for SLVs). Twenty of the twenty-seven strains were cloned and sequenced. Pairwise sequence analysis showed that 9 (60%) and 6 (40%) of the 15 strains from the diarrhea stools were NLVs and SLVs, respectively. The same proportions of NLVs (60%) and SLVs (40%) were observed in the non-diarrhea stools. Strains in the NLV genus could be further divided into four clusters: Lordsdale, MxV, and HV and one potentially new cluster. Strains in the SLV genus could be divided into three clusters: Sapporo/82, Lon/92, and a potentially new cluster. Strains from the Lordsdale cluster were the most common among these children. The findings of both genera and multiple clusters of HuCVs co-circulating and the identification of new strains of HuCVs in the population justify the need for future studies of HuCVs in infants and children. (C) 2000 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 39 U4 - Virology U5 - J;Article AV - English IS - 0146-6615 UR - ISI:000089114900013 L2 - gastroenteritis;diarrhea;human caliciviruses;Norwalk virus;RT-PCR;sequencing;children;ROUND-STRUCTURED VIRUSES; NORWALK-LIKE VIRUSES; LINKED IMMUNOSORBENT ASSAYS; CAPSID PROTEIN; SOUTHEAST-ASIA; MOLECULAR EPIDEMIOLOGY; ACUTE GASTROENTERITIS; ROTAVIRUS INFECTION; ENZYME-IMMUNOASSAY; GIARDIA-LAMBLIA SO - Journal of Medical Virology 2000 ;62(2):217-223 636 UI - 14234 AU - Farquhar T AU - Wood JZ AU - van Beem J AD - Univ Maryland, Dept Mech Engn, Baltimore, MD 21250, USANorthrop Grumman Corp, Baltimore, MD, USAInt Ctr Maize & Wheat Improvement, Mexico City, DF, MexicoFarquhar, T, Univ Maryland, Dept Mech Engn, Baltimore, MD 21250, USA TI - The kinematics of wheat struck by a wind gust AB - A nonlinear model of the kinematics of a wheat stalk struck by a wind gust is developed. Individual stalks were excited from each of many directions and observed by videophotography The underdamped flexural response involved anisotropic circling motion that can be reproduced by a nonlinear system of ODEs. In the model, the horizontal path traveled by the grain mass is described in principal coordinates X-I and X-II. The four required constants are stiffnesses k(I). and coupling strength beta related to a torque imposed by wind drag. This stem torque can cause nonlinear coupling if both XI and XII are excited and if k(i) not equal k(II), such that damping can vary by 30 percent over each cycle. The directionality of the single stalk may promote interplant collision, which could have important integrated effects on crop behavior at larger size scales MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 5 U4 - Mechanics U5 - J;Article AV - English IS - 0021-8936 UR - ISI:000167109500008 L2 - WINTER-WHEAT; PLANT STEMS; CULTIVARS; STIFFNESS; LINES; YIELD SO - Journal of Applied Mechanics-Transactions of the Asme 2000 ;67(3):496-502 637 UI - 16228 AU - Farquhar T AU - Meyer H AU - van Beem J AD - Univ Maryland Baltimore Cty, Baltimore, MD 21250, USAInt Ctr Maize & Wheat Improvement, CIMMYT, Mexico City, DF, MexicoFarquhar, T, Univ Maryland Baltimore Cty, 1000 Hilltop Circle, Baltimore, MD 21250 USA TI - Effect of aeroelasticity on the aerodynamics of wheat AB - The objective of this study was to measure the aerodynamic forces on the grain-bearing spike of five varieties of wheat, chosen for varying wind tolerance. The green spikes were harvested at the dough stage and tested in a wind tunnel in laminar flows of up to 15 m/s at three orientations. There was a four-fold variation in drag between varieties, and some varieties showed a two-fold variation in drag according to orientation. Wind-induced deformation reduced the drag coefficient by up to 50% as airspeed was increased to 10 m/s, and the lift/drag ratio sometimes changed sign over this range. These aeroelastic effects increased aerodynamic stability and streamlining, and substantially reduced the drag force. Hence, it may be possible to increase the wind tolerance of wheat by increasing the flexibility of its spike. (C) 2000 Published by Elsevier Science S.A. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000086301000006 L2 - wheat;aeroelasticity;drag;lodging;wind tolerance;flexibility;TRITICUM-AESTIVUM L; WINTER-WHEAT; AGRONOMIC COMPARISONS; PLANTS; GENES; RHT1; MECHANICS; HEIGHT; LINES SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2000 ;7(2):111-117 638 UI - 15899 AU - Farsang C AU - Garcia-Puig J AU - Niegowska J AU - Baiz AQ AU - Vrijens F AU - Bortman G AD - St Imre Teaching Hosp, Dept Internal Med 1, H-1115 Budapest, HungaryHosp La Paz, Madrid, SpainInst Kardiol, Warsaw, PolandUnidad Med Norte, Barranquilla, ColombiaInt Inst Drug Dev, Brussels, BelgiumHosp Espanol, Moreno 2956, DF, MexicoFarsang, C, St Imre Teaching Hosp, Dept Internal Med 1, Tetenyi Ut 12-16, H-1115 Budapest, Hungary TI - The efficacy and tolerability of losartan versus atenolol in patients with isolated systolic hypertension AB - Objective To compare the efficacy and tolerability of angiotensin II (Ang II) antagonist losartan and the beta-blocker atenolol in the treatment of patients with isolated systolic hypertension (ISH) after 16 weeks of treatment. Methods A double-blind, randomized, multi-country study was carried out in 273 patients with ISH. Patients with a sitting systolic blood pressure (SiSBP) of 160-205 mmHg, and a sitting diastolic blood pressure (SiDBP) < 90 mmHg at screening and at placebo baseline were subjected to a 4-week placebo period and then randomly grouped to receive 50 mg losartan or 50 mg atenolol once daily for 16 weeks. At 8 and 12 weeks, patients not controlled (SiDBP greater than or equal to 160 mmHg) were given additional treatment of 12.5 mg hydrochlorothiazide (HCTZ) once daily. Results Similar significant reductions in SiSBPs (mean a SD) were obtained with 50 mg losartan and 50 mg atenolol, from 173.7 +/- 10.3 and 173.5 +/- 10.7 mmHg at baseline to 149.0 +/- 15.5 and 148.2 +/- 15.3 mmHg after 16 weeks of losartan or atenolol treatment, respectively. Sixty-seven percent of the losartan-treated and 64% of the atenolol-treated patients remained on monotherapy throughout the study. Only 1.5% of the losartan-treated patients withdrew because of a clinical adverse event (CAE) compared with 7.2% in the atenolol-treatment group (P = 0.035). Drug-related CAEs were observed significantly more frequently with atenolol than with losartan treatment (20.3 versus 10.4%; P = 0.029). Conclusion It is concluded that 50 mg losartan and 50 mg atenolol produced comparable reductions in SiSBP in patients with ISH but losartan was better tolerated. This is the first demonstration of the therapeutic value of selective Ang II receptor blockade with losartan in the treatment of ISH. J Hypertens 2000, 18:795-801 (C) Lippincott Williams & Wilkins MH - Belgium MH - Colombia MH - Hungary MH - Mexico|Distrito Federal MH - Poland MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000087508200019 L2 - losartan;atenolol;isolated systolic hypertension;angiotensin II antagonists;beta adrenoceptor antagonist;QUALITY-OF-LIFE; SYSTEMIC HYPERTENSION; ANGIOTENSIN-II; BLOOD-PRESSURE; ANTIHYPERTENSIVE EFFICACY; RECEPTOR ANTAGONIST; ELDERLY PATIENTS; ACTIVE TREATMENT; NIFEDIPINE GITS; OLDER PATIENTS SO - Journal of Hypertension 2000 ;18(6):795-801 639 UI - 14825 AU - Fassia A AU - Meikle WPS AU - Vacca WD AU - Kemp SN AU - Walton NA AU - Pollacco DL AU - Smartt S AU - Oscoz A AU - ragon-Salamanca A AU - Bennett S AU - Hawarden TG AU - Alonso A AU - Alcalde D AU - Pedrosa A AU - Telting J AU - Arevalo MJ AU - Deeg HJ AU - Garzon F AU - Gomez-Roldan A AU - Gomez G AU - Gutierrez C AU - Lopez S AU - Rozas M AU - Serra-Ricart M AU - Zapatero-Osorio MR AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, EnglandInst Astron, Honolulu, HI 96822, USAInst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoRoyal Greenwich Observ, Tenerife 38780, Isl Canarias, SpainQueens Univ Belfast, Astrophys & Planetary Sci Div, Belfast BT7 1NN, Antrim, North IrelandInst Astrofis Canarias, E-38200 La Laguna, SpainUniv Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandJoint Astron Ctr, Hilo, HI 96720, USAUniv Porto, Ctr Astrofis, P-4100 Porto, PortugalNWO Netherlands Org Sci Res, Isaac Newton Grp Telescopes, Santa Cruz De La Palma 38700, SpainFassia, A, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, Prince Consort Rd, London SW7 2BZ, England TI - Optical and infrared photometry of the Type IInSN1998S: days 11-146 AB - We present contemporaneous optical and infrared (IR) photometric observations of the Type IIn SN 1998S covering the period between 11 and 146 d after discovery. The IR data constitute the first ever IR light curves of a Type IIn supernova. We use blackbody and spline fits to the photometry to examine the luminosity evolution. During the first 2-3 months, the luminosity is dominated by the release of shock-deposited energy in the ejecta. After similar to 100 d the luminosity is powered mostly by the deposition of radioactive decay energy from 0.15 +/-0.05 M-. of Ni-56 which was produced in the explosion. We also report the discovery of an astonishingly high IR excess, K-L'=2.5, that was present at day 130. We interpret this as being due to thermal emission from dust grains in the vicinity of the supernova. We argue that to produce such a high IR luminosity so soon after the explosion, the dust must be pre-existing and so is located in the circumstellar medium of the progenitor. The dust could be heated either by the UV/optical flash (IR echo) or by the X-rays from the interaction of the ejecta with the circumstellar material MH - United Kingdom MH - Mexico|Jalisco MH - Portugal MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000165455700018 L2 - circumstellar matter;supernovae : individual : SN 19985;infrared : stars;INTERSTELLAR NA-I; LIGHT CURVES; UBVRI PHOTOMETRY; STANDARD STARS; IIP SUPERNOVA; CA-II; H-I; ABSORPTION; EMISSION; MODEL SO - Monthly Notices of the Royal Astronomical Society 2000 ;318(4):1093-1104 640 UI - 16591 AU - Felix-Medina MH AD - Penn State Univ, Dept Stat, University Pk, PA 16802, USAUniv Autonoma Sinaloa, Esc Ciencias Fis Matemat, Culiacan Sinaloa, Mexico TI - Analytical expressions for Rao-Blackwell estimators in adaptive cluster sampling AB - In this paper, we consider adaptive cluster sampling with the initial sample selected either by simple random sampling without replacement or by unequal probability sampling with replacement. We derive analytical expressions for the Rao-Blackwell versions of the following two estimators originally proposed by Thompson (1990, J. Amer. Statist. Assoc. 85, 1050-1059): the modified Horvitz-Thompson estimator and the modified Hansen-Hurwitz one. Furthermore, we derive analytical expressions for the variances of the two Rao-Blackwell estimators above mentioned, as well as analytical expressions for unbiased Rao-Blackwell estimators of those variances. In the without-replacement case, the derivations are based on the multivariate hypergeometric distribution, whereas in the with-replacement case, they are based on the multinomial distribution. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Sinaloa MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0378-3758 UR - ISI:000085006300014 L2 - adaptive cluster sampling;design-based inferential approach;finite population;minimal sufficient statistic;Rao-Blackwell theorem;simple random sampling;unequal probability sampling SO - Journal of Statistical Planning and Inference 2000 ;84(1-2):221-236 641 UI - 16084 AU - Felix-Medina R AU - Guirado-Lopez R AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 7800, MexicoUniv Toulouse 3, CNRS, UMR 5626, Phys Quant Lab, F-31062 Toulouse, FranceFelix-Medina, R, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 7800, Mexico TI - Calculation of the magnetic properties of Co-N clusters on Pd(111) AB - The magnetic properties of Co-N clusters (N less than or equal to 7) deposited on Pd(111) have been determined in the framework of a self-consistent d-band model Hamiltonian. Results are given for the spin and orbital magnetic moments and for the magnetic anisotropy energy for different structures of the Co-N clusters. We find that the magnetic orbital contribution to the total magnetic moment can be of the order of 20%. The magnetization direction of Co-N changes in most cases from in-plane to off-plane upon deposition. We observe that the main contribution to the magnetic anisotropy energy results from the cluster-substrate interface. Comparison of the magnetic properties between deposited and free clusters is also provided. (C) 2000 American Institute of Physics. [S0021-8979(00)67808-8] MH - France MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000086727200075 L2 - TRANSITION; ANISOTROPY; NANOSTRUCTURES; FILMS; CR; FE SO - Journal of Applied Physics 2000 ;87(9):4894-4896 642 UI - 15914 AU - Feng ZL AU - Castillo-Chavez C AU - Capurro AF AD - Purdue Univ, Dept Math, W Lafayette, IN 47907, USACornell Univ, Biometr Unit, Ithaca, NY 14853, USAUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicada, Mexico City 04510, DF, MexicoUniv Belgrano, Dept Invest, Programa Invest Epidemiol, CONICET, RA-1426 Buenos Aires, DF, ArgentinaUniv Nacl Jujan, RA-6700 Lujan, ArgentinaFeng, ZL, Purdue Univ, Dept Math, W Lafayette, IN 47907, USA TI - A model for tuberculosis with exogenous reinfection AB - Following primary tuberculosis (TB) infection, only approximately 10% of individuals develop active T.B. Most people are assumed to mount an effective immune response to the initial infection that limits proliferation of the bacilli and leads to long-lasting partial immunity both to further infection and to reactivation of latent bacilli remaining from the original infection. Infected individuals may develop active TB as a consequence of exogenous reinfection, i.e., acquiring a new infection from another infectious individual, Our results in this paper suggest that exogenous reinfection has a drastic effect on the qualitative dynamics of TB, The incorporation of exogenous reinfection into our TB model allows the possibility of a subcritical bifurcation at the critical value of the basic reproductive number R-0 = 1, and hence the existence of multiple endemic equilibria for R-0 < 1 and the exogenous reinfection rate larger than a threshold, Our results suggest that reducing R-0 to be smaller than one may not be sufficient to eradicate the disease, An additional reduction in reinfection rate may be required, These results may also partially explain the recently observed resurgence of TB, (C) 2000 Academic Press MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 40 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0040-5809 UR - ISI:000087411400004 L2 - AUTONOMOUS DIFFERENTIAL-EQUATIONS; HIV-INFECTION; UNITED-STATES; MYCOBACTERIUM-TUBERCULOSIS; EPIDEMIOLOGICAL MODELS; AGE-STRUCTURE; TRANSMISSION; IMPACT; BORN; POPULATIONS SO - Theoretical Population Biology 2000 ;57(3):235-247 643 UI - 15634 AU - Ferbeyre G AU - Bourdeau V AU - Pageau M AU - Miramontes P AU - Cedergren R AD - Cold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USAUniv Montreal, Dept Biochim, Montreal, PQ H3C 3J7, CanadaUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoFerbeyre, G, Cold Spring Harbor Lab, POB 100, Cold Spring Harbor, NY 11724 USA TI - Distribution of hammerhead and hammerhead-like RNA motifs through the GenBank AB - Hammerhead ribozymes previously were found in satellite RNAs from plant viroids and in repetitive DNA from certain species of newts and schistosomes. To determine if this catalytic RNA motif has a wider distribution, we decided to scrutinize the GenBank database for RNAs that contain hammerhead or hammerhead-like motifs. The search shows a widespread distribution of this kind of RNA motif in different sequences suggesting that they might have a more general role in RNA biology. The frequency of the hammerhead motif is half of that expected from a random distribution, but this fact comes From the low CpG representation in vertebrate sequences and the bias of the GenBank for those sequences. Intriguing motifs include those found in several families of repetitive sequences, in the satellite RNA from the carrot red leaf luteovirus, in plant viruses like the spinach latent virus and the elm mottle virus, in animal viruses like the hepatitis E virus and the caprine encephalitis virus, and in mRNAs such as those coding for cytochrome P450 oxidoreductase in the rat and the hamster MH - USA MH - Canada MH - Mexico|Distrito Federal PB - PLAINVIEW: COLD SPRING HARBOR LAB PRESS RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 1088-9051 UR - ISI:000088264800014 L2 - SECONDARY STRUCTURES; SELF-CLEAVAGE; SATELLITE DNA; RIBOZYME; TRANSCRIPTS; SEQUENCES; MODEL; NEWT; RULE SO - Genome Research 2000 ;10(7):1011-1019 644 UI - 15681 AU - Ferket H AU - Roure F AU - Swennen R AU - Ortuno S AD - Katholieke Univ Leuven, B-3001 Heverlee, BelgiumInst Francais Petr, F-92852 Rueil Malmaison, FranceInst Mexicano Petr, Mexico City 07730, DF, MexicoFerket, H, Katholieke Univ Leuven, Celestijnenlaan 200C, B-3001 Heverlee, Belgium TI - Fluid migration placed into the deformation history of fold-and-thrust belts: an example from the Veracruz basin (Mexico) AB - The Cordoba carbonate platform (Mexico) has been studied to reconstruct the fluid flow evolution in a foreland fold-and-thrust belt. The objective is to link the deformation kinematics and thermal evolution to fluid expulsion and migration. This allows the reconstruction of a more complete picture of the deformation history and its effect on reservoir evolution within these belts. Different fracturing episodes relate to tectonically induced overpressures, while development of a flexural bulge and subsequent thrusting and folding caused two different episodes of karstification. The role of different stylolitisation episodes, i.e. bed parallel (BPS) and layer parallel shortening (LPS) stylolites, in this study is of major importance, because they allow a correlation between fluid flow and the burial and tectonic evolution of the foreland. (C) 2000 Elsevier Science B.V. All rights reserved MH - Belgium MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000088104900050 L2 - foreland fold-and-thrust belt;diagenesis;porosity-permeability;fluid flow;platform carbonates SO - Journal of Geochemical Exploration 2000 ;69():275-279 645 UI - 16039 AU - Fernandez-Bertran J AU - Alfonso LM AU - Alvarez JC AU - Reguera E AD - IPN, Escuela Super Fis & Matemat, Unidad Prof Adolfo Lopez Mateos, Mexico City 07738, DF, MexicoCtr Nacl Invest Cient, Havana, CubaCtr Quim Farmaceut, Havana, CubaReguera, E, IPN, Escuela Super Fis & Matemat, Unidad Prof Adolfo Lopez Mateos, Edificio 9,Colonia Lindavista, Mexico City 07738, DF, Mexico TI - Mechanochemical synthesis of urea adducts with long chain alkyl derivatives AB - The adducts of urea and solid alkyl derivatives can be obtained mechanochemically in good yields. The products synthesized by grinding the solid reagents have identical IR spectra and XRD powder patterns to those obtained by crystallization from ethanolic solutions MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Crystallography U5 - J;Article AV - English IS - 0923-0750 UR - ISI:000086963700010 L2 - urea adducts;alkyl derivatives;mechanochemical synthesis;MOLECULAR MOTIONS SO - Journal of Inclusion Phenomena and Macrocyclic Chemistry 2000 ;37(1-4):131-136 646 UI - 14373 AU - Fernandez-Bouzas A AU - Harmony T AU - Fernandez T AU - Silva-Pereyra J AU - Valdes P AU - Bosch J AU - Aubert E AU - Casian G AU - Ojeda GO AU - Ricardo J AU - Hernandez-Ballesteros A AU - Santiago E AD - UNAM, ENEP Iztacala, Mexico City 03710, DF, MexicoUNAM, Ctr Neurobiol, Mexico City 03710, DF, MexicoHosp Juarez Mexico SSA, Mexico City, DF, MexicoCtr Neurociencias Cuba, La Habana, CubaUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoFernandez-Bouzas, A, UNAM, ENEP Iztacala, Clemente Oroco 36, Mexico City 03710, DF, Mexico TI - Sources of abnormal EEG activity in brain infarctions MH - Cuba MH - Mexico|Distrito Federal PB - WHEATON: EEG & CLINICAL NEUROSCIENCE SOC (E C N S) RP - NOT IN FILE U3 - TC 20 U4 - Engineering, Biomedical;Clinical Neurology U5 - J;Article AV - English IS - 0009-9155 UR - ISI:000166808200001 L2 - brain infarcts;delta power;edema;electroencephalography;ischemic penumbra;source analysis;stroke;theta power;COMPUTED-TOMOGRAPHY; CEREBRAL-ISCHEMIA; LESIONS; NEUROMETRICS; FREQUENCIES; PENUMBRA; STROKE SO - Clinical Electroencephalography 2000 ;31(4):165-169 647 UI - 15355 AU - Fernandez-Guasti A AU - Kruijver FPM AU - Fodor M AU - Swaab DF AD - Univ Amsterdam, Netherlands Inst Brain Res, Grad Sch Neurosci, NL-1105 AZ Amsterdam, NetherlandsCINVESTAV, Dept Farmacol & Toxicol, Mexico City 14000, DF, MexicoIMP, Div Invest Neurociencias, Mexico City, DF, MexicoFree Univ Amsterdam, Dept Pediat, Res Inst Endocrinol Reprod & Metab, Amsterdam, NetherlandsKruijver, FPM, Univ Amsterdam, Netherlands Inst Brain Res, Grad Sch Neurosci, Meibergdreef 33, NL-1105 AZ Amsterdam, Netherlands TI - Sex differences in the distribution of androgen receptors in the human hypothalamus AB - The present study reports for the first time the distribution of androgen receptor immunoreactivity (AR-ir) in the human hypothalamus of ten human subjects (five men and five women) ranging in age between 20 years and 39 years using the antibody PG21. Prolonged postmortem delay (72:00 hours) or fixation time (100 days) did not influence the AR-ir. In men, intense nuclear AR-ir was found in neurons of the horizontal limb of the diagonal band of Broca. in neurons of the lateromamillary nucleus (LMN), and in the medial mamillary nucleus (MMN). An intermediate nuclear staining was found in the diagonal band of Broca, sexually dimorphic nucleus of the preoptic area, paraventricular nucleus, suprachiasmatic nucleus, ventromedial nucleus, and infundibular nucleus, whereas weaker labeling was found in the bed nucleus of the stria terminalis, medial preoptic area, dorsal and ventral zones of the periventricular nucleus, supraoptic nucleus, and nucleus basalis of Meynert. In most brain areas, women revealed less staining than men. In the LMN and the MMN, a strong sex difference was found. Cytoplasmic labeling was observed in neurons of both sexes, although women showed a higher variability in the intensity of such staining. However, no sex differences in AR-ir were observed in the bed nucleus of the stria terminalis, the nucleus basalis of Meynert, or the islands of Calleja. Species differences and similarities of the AR-ir distribution are discussed. The present results suggest the participation of androgens in the regulation of various hypothalamic processes that are sexually dimorphic. J. Comp. Neurol. 425:422-435, 2000. (C) 2000 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 60 U4 - Neurosciences;Zoology U5 - J;Article AV - English IS - 0021-9967 UR - ISI:000088953600007 L2 - sex hormone receptors;male-female differences;sexual dimorphism;androgen receptor immunohistochemistry;PG21;human hypothalamus;SEXUALLY DIMORPHIC NUCLEUS; HUMAN-BRAIN; RAT-BRAIN; SUPRACHIASMATIC NUCLEUS; PREOPTIC AREA; IMMUNOREACTIVE NEURONS; POLYCLONAL ANTIBODIES; AROMATASE-ACTIVITY; SYRIAN-HAMSTER; BED NUCLEUS SO - Journal of Comparative Neurology 2000 ;425(3):422-435 648 UI - 15491 AU - Fernandez-Ruiz J AU - Hall-Haro C AU - Diaz R AU - Mischner J AU - Vergara P AU - Lopez-Garcia JC AD - Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Lab Neuropsicol, Mexico City 04510, DF, MexicoCSIC, Inst Cajal, E-28002 Madrid, SpainFernandez-Ruiz, J, Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Lab Neuropsicol, Mexico City 04510, DF, Mexico TI - Learning motor synergies makes use of information on muscular load AB - Prism adaptation, a form of procedural learning, requires the integration of visual and motor information for its proper acquisition. Although the role of the visual feedback has begun to be understood, the nature of the motor information necessary for the development of the adaptation remains unknown. In this work we have tested the idea that modifying the arm load at different stages of the adaptation process, and the ensuing change of motor information perceived by the subjects, would modify the final properties of the adaptation. We trained a set of subjects to throw balls to a target while wearing prism glasses and varied the weight of their arms at different time points during the task. We observed that the acquisition of the adaptation was not affected by the change in load. However, its persistence (i.e., the aftereffect) was reduced when tested under a weight condition different from the training trials. Furthermore, when the training weight conditions were restored later during testing, a second, late aftereffect was unmasked, suggesting that the missing aftereffect did not disappear but had remained latent. Our results show that the internal representation of a motor memory incorporates information about load conditions and that the memory stored under a specific weight condition can be fully retrieved only when the original training condition is restored MH - Mexico|Distrito Federal MH - Spain PB - PLAINVIEW: COLD SPRING HARBOR LAB PRESS RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences;Psychology, Experimental U5 - J;Article AV - English IS - 1072-0502 UR - ISI:000088715600001 L2 - PRISM ADAPTATION; SPECIFICITY SO - Learning & Memory 2000 ;7(4):193-198 649 UI - 15463 AU - Fernandez A AU - Doval AF AU - Kaufmann GH AU - Davila A AU - Blanco-Garcia J AU - Perez-Lopez C AU - Fernandez JL AD - Univ Vigo, Dept Engn Design, Escuela Tecn Super Ingn Ind, E-36200 Vigo, SpainUniv Vigo, Dept Appl Phys, Escuela Tecn Super Ingn Ind, E-36200 Vigo, SpainUniv Nacl Rosario, Inst Fis, RA-2000 Rosario, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-2000 Rosario, ArgentinaCtr Invest Opt, Leon 37000, Gto, MexicoFernandez, A, Univ Vigo, Dept Engn Design, Escuela Tecn Super Ingn Ind, Campus Univ Lagoas Marcosende, E-36200 Vigo, Spain TI - Measurement of transient out-of-plane displacement gradients in plates using double-pulsed subtraction TV shearography AB - We report a technique for the measurement of transient out-of-plane displacement gradients in plane objects by double-pulsed subtraction TV shearography. The fringe patterns are automatically and quantitatively analyzed by the Fourier transform method. A novel optical setup based on the separation and further recombination of illumination beams is demonstrated for the generation of carrier fringes. The principle of the proposed technique is theoretically described, and its immunity to environmental disturbances is discussed. Experimental results obtained with a metallic plate excited by the impact of a piezoelectric transducer are presented. (C) 2000 Society of Photo-Optical instrumentation Engineers. [S0091-3286(00)02908-1] MH - Argentina MH - Mexico|Guanajuato MH - Spain PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000088734700013 L2 - metrology;speckle interferometry;shearography;shock;FOURIER-TRANSFORM METHOD; SHEARING PATTERN INTERFEROMETRY; DEFORMATION ANALYSIS; HOLOGRAPHY SO - Optical Engineering 2000 ;39(8):2106-2113 650 UI - 16479 AU - Fernandez B AU - Meleard S AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Math, Mexico City 04510, DF, MexicoUniv Paris 10, MODALX UFR SEGMI, F-92000 Nanterre, FranceUniv Paris 06, Probabil Lab, F-75231 Paris, FranceFernandez, B, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Math, Mexico City 04510, DF, Mexico TI - Asymptotic behaviour for interacting diffusion processes with space-time random birth AB - We study the asymptotic behaviour of a system of interacting particles with space-time random birth. We have propagation of chaos and obtain the convergence of the empirical measures, when the size of the system tends to infinity. Then we show the convergence of the fluctuations, considered as cadlag processes with values in a weighted Sobolev space, to an Ornstein-Uhlenbeck process, the solution of a generalized Langevin equation. The tightness is proved by using a Hilbertian approach. The uniqueness of the limit is obtained by considering it as the solution of an evolution equation in a greater Banach space. The main difficulties are due to the unboundedness of the operators appearing in the semimartingale decomposition MH - France MH - Mexico|Distrito Federal PB - VOORBURG: INT STATISTICAL INST RP - NOT IN FILE U3 - TC 3 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1350-7265 UR - ISI:000085574800006 L2 - convergence of fluctuations;interacting particle systems;propagation of chaos;space-time random birth;EQUATION SO - Bernoulli 2000 ;6(1):91-111 651 UI - 14962 AU - Fernandez DJ AU - Negro J AU - Nieto LM AD - Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoNieto, LM, Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, Spain TI - Second-order supersymmetric periodic potentials AB - Irreducible second-order SUSY transformations are applied to periodic Hamiltonians in order to find physically acceptable partner potentials with the same band structure as the initial one. Lame's potentials are analized in the same context. The main differences with the SUSY approach to potentials allowing for a discrete spectrum are also discussed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 44 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000165116700004 L2 - second-order supersymmetry;intertwining operators;periodic potentials;Lame's potentials;QUANTUM-MECHANICS; FACTORIZATION METHOD; DARBOUX TRANSFORMATION; SCHRODINGER-EQUATION; COHERENT STATES; LAME; HAMILTONIANS; SCATTERING; SYSTEMS; SPECTRA SO - Physics Letters A 2000 ;275(5-6):338-349 652 UI - 15292 AU - Fernandez GJ AU - Mermoz ME AD - CONICET, Inst Biol & Med Expt, Lab Biol Comportamiento, RA-1428 Buenos Aires, DF, ArgentinaUniv Nacl Lujan, Lab Ecol, Programa Ecol Matemat, RA-6700 Buenos Aires, DF, ArgentinaInst Ecol, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoFernandez, GJ, CONICET, Inst Biol & Med Expt, Lab Biol Comportamiento, Vuelta Obligado 2490, RA-1428 Buenos Aires, DF, Argentina TI - Effect of predation and cowbird parasitism on the nesting success of two sympatric neotropical marshbirds AB - We compared the effect of nest predation and cowbird parasitism on the breeding success of two simultaneously nesting ecologically similar blackbird species that differ in their breeding strategies. The Scarlet-headed Blackbird (Amblyramphus holosericeus) is a monogamous species that performs territorial defense. In contrast, the Brown-and-yellow Marshbird (Pseudoleistes virescens) is a non-territorial monogamous breeder that performs mate guarding and has helpers at the nest. Both species suffered similar nest predation rates throughout their nesting cycle. However, the Brown-and-yellow Marshbird suffered higher parasitism from I (62.6% vs 15.4%). Brood parasitism accounted for most of the egg losses and hatching failures in Brown-and-yellow Marshbird. Parasitized nests had lower egg survival and hatching success than non-parasitized ones. Mean clutch size was 1.5 eggs larger in Brown-and-yellow Marshbird than in Scarlet-headed Blackbird. However, Scarlet-headed Blackbird had higher hatching success than Brown-and-yellow Marshbird and similar fledging success. Consequently, both species produced similar numbers of fledglings. We did not detect any relationship between the reproductive success of these species and their breeding strategies. The presence of helpers at Brown-and-yellow Marshbird nests did not affect nest defense or chick survival, but helpers might account for reduced parental effort by supplementing food delivery to chicks/fledglings MH - Argentina MH - Mexico|Veracruz PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000089097200008 L2 - OPTIMAL NICHE SPACE; BROOD PARASITISM; SHINY-COWBIRD; REDWINGED BLACKBIRD; BIRDS; EGGS; HYPOTHESIS; EVOLUTION; INCUBATION; FIELDFARES SO - Wilson Bulletin 2000 ;112(3):354-364 653 UI - 15333 AU - Fernandez T AU - Harmony T AU - Silva-Pereyra J AU - Fernandez-Bouzas A AU - Gersenowies J AU - Galan L AU - Carbonell F AU - Marosi E AU - Otero T AU - Valdes SI AD - UNAM, ENEP Iztacala, Mexico City 03710, DF, MexicoCtr Neurobiol, Queretaro 76001, MexicoCtr Neurociencias Cuba, La Habana, CubaFernandez, T, UNAM, ENEP Iztacala, Jose Clemente Orozco 36-2,Ciudad Deportes, Mexico City 03710, DF, Mexico TI - Specific EEG frequencies at specific brain areas and performance AB - In this study it was shown that in adults, the frequency characteristics of EEG preceding stimuli that were followed by incorrect responses were different from the characteristics of EEG preceding stimuli that were followed by correct responses. In the recording during three different tasks that explore different neuronal networks, higher values of current preceding incorrect performance in those areas directly related to the task were found in frequencies within the delta (1.56 and 3.12 Hz) and beta bands (13.26, 14.04, 14.82, 15.6, 17.16 and 17.94 Hz), suggesting that these frequencies signal inhibition. Frequencies within the alpha band (9.36 and 12.48 Hz) showed greater energy preceding correct responses in task-specific areas, supporting previous results observed in children. (C) 2000 Lippincott Williams & Wilkins MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 12 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000089003300020 L2 - alpha;beta;delta;EEG;mental calculation;performance;source analysis;theta;working memory;MENTAL CALCULATION; WORKING-MEMORY; ACTIVATION; TASKS SO - Neuroreport 2000 ;11(12):2663-2668 654 UI - 16140 AU - Ferrari L AU - Stock JM AU - Fucugauchi JU AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoCALTECH, Seismol Lab 252 21, Pasadena, CA 91125, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoFerrari, L, Univ Nacl Autonoma Mexico, Inst Geol, Cd Univ, Mexico City 04510, DF, Mexico TI - Special Issue - The influence of plate interaction on post-Laramide magmatism and tectonics in Mexico - Introduction MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Editorial Material AV - English IS - 0040-1951 UR - ISI:000086576700001 SO - Tectonophysics 2000 ;318(1-4):VII-VIX 655 UI - 16144 AU - Ferrari L AU - Conticelli S AU - Vaggelli G AU - Petrone CM AU - Manetti P AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoCNR, Ctr Studio Minerogenesi & Geochim Applicata, I-50121 Florence, ItalyUniv Basilicata, I-85100 Potenza, ItalyUniv Florence, Dipartimento Sci Terra, I-50121 Florence, ItalyFerrari, L, Univ Nacl Autonoma Mexico, Inst Geol, Cd Univ, Mexico City 04510, DF, Mexico TI - Late Miocene volcanism and intra-arc tectonics during the early development of the Trans-Mexican Volcanic Belt AB - The early stage of the Trans-Mexican Volcanic Belt thereafter TMVB) is marked by widespread, mafic to intermediate, volcanism emplaced between 11 and 7 Ma from the Pacific coast to the longitude of Mexico City, to the north of the modern volcanic are. Petrological and geochronological data support the hypothesis that this volcanism made up a unique late Miocenic central Mexican comagmatic province. Mafic lavas at the mouth of the Gulf of California and along the northwestern sector of the TMVB made up the Nayarit district, which includes calc-alkaline to transitional varieties. The central sector of the TMVB is characterized by two basaltic districts: the Jalisco-Guanajuato and the Queretaro-Hidalgo, which are distinguished from the westernmost ones by their lower Nb/La and generally lower HFSE/LILE values, as well as by spider diagrams characterized by larger negative spikes at Th, Ta, Nb, and Ti, The surface occurrence of the late Miocene basalts appears to be controlled by pre-existing zones of crustal weakness that channeled the mafic magmas. Field observations suggest that these structures have been reactivated in a transtensional fashion induced by differential tectonic motion of crustal blocks to the south and to the north of the TMVB, Starting from similar to 12 Ma the TMVB separates a northern tectonic domain, subject to the developing divergent Pacific-North America plate boundary, from a southern tectonic domain, characterized by oblique subduction of the Rivera and Cocos plates. Apparently, far field stresses related to these complex plate boundaries reactivated older suture zones, allowing rapid uprise of mantle-derived magmas, The subduction-related signature shown by Miocene mafic lavas of the Jalisco-Guanajuato district argues against the existence of mantle plumes beneath this sector of the North America plate. On the other hand, the occurrence in the western TMVB and in the Guadalajara region of a large volume of mafic magmas, which sometimes show characteristics transitional to Ocean Island Basalts, could be due to passive upwelling of the subslab asthenosphere that might have interacted with subduction-related magmas and continental lithosphere to produce the observed basaltic varieties. Subslab magmas may have flowed through slab-free areas along the northern and eastern edges of the subducting Rivers plate, which in the late Miocene was already detached from the Farallon plate remnants and diverging from the Cocos plate, (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 28 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700008 L2 - geochemistry;Late Miocene;mafic volcanism;oblique subduction;Trans-Mexican Volcanic Belt;transtensional tectonics;CHEMICAL CLASSIFICATION; RANGE PROVINCE; WESTERN MEXICO; JALISCO BLOCK; EXTENSION; GULF; CALIFORNIA; ROCKS; INTERSECTION; EVOLUTION SO - Tectonophysics 2000 ;318(1-4):161-185 656 UI - 15661 AU - Ferreira A AU - Picazo O AU - Uriarte N AU - Pereira M AU - Fernandez-Guasti A AD - IPN, Ctr Invest & Estudios Avanzados, Dept Farmacol & Toxicol, Mexico City 14000, DF, MexicoIPN, Div Invest Neurociencias, Mexico City 14000, DF, MexicoUniv Republ, Fac Ciencias, Montevideo, UruguayIPN, Escuela Super Med, Mexico City 14000, DF, MexicoFernandez-Guasti, A, IPN, Ctr Invest & Estudios Avanzados, Dept Farmacol & Toxicol, Ap Postal 22026, Mexico City 14000, DF, Mexico TI - Inhibitory effect of buspirone and diazepam, but not of 8-OH-DPAT, on maternal behavior and aggression AB - The action of diazepam (0.0; 1.0, and 2.0 mg/kg) and the serotonergic compounds buspirone (0.0, 2.5, and 5.0 mg/kg) and 8-OH-DPAT (0.0, 0.1, and 1.0 mg/kg) on maternal behavior and aggression were studied. An activity test was made after these treatments to control for unspecific actions due to motor impairment. Diazepam and buspirone dose-dependently inhibited the expression of maternal aggression and the active components of maternal behavior such as retrieving and nest building. 8-OH-DPAT did not affect these behaviors. 8-OH-DPAT (1.0 mg/kg) provoked the serotonergic syndrome and hypothermia; however, ovariectomized animals showed more signs of the syndrome and a decrease in body temperature after 8-OH-DPAT than lactating rats. Buspirone, but not the other anxiolytics, reduced motor activity. The role of drugs acting at the serotonergic, dopaminergic, and GABA-benzodiazepine systems in the control of maternal behavior and aggression is discussed. (C) 2000 Elsevier Science Inc MH - Mexico|Distrito Federal MH - Uruguay PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Behavioral Sciences;Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0091-3057 UR - ISI:000088062800023 L2 - diazepam;buspirone;8-OH-DPAT;maternal behavior;maternal aggression;SEROTONERGIC ANXIOLYTICS; BENZODIAZEPINE RECEPTOR; LACTATING RATS; MOTHER RATS; FEMALE RAT; EMOTIONALITY; PREGNANCY; EFFICACY; AGONISTS; LESIONS SO - Pharmacology Biochemistry and Behavior 2000 ;66(2):389-396 657 UI - 16025 AU - Ferreira FM AU - Mendoza-Hernamdez G AU - Calcagno ML AU - Minauro F AU - Delboni LF AU - Oliva G AD - Univ Sao Paulo, Inst Fis Sao Carlos, Lab Cristalog Prot & Biol Estrutural, BR-13560970 Sao Carlos, SP, BrazilUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoOliva, G, Univ Sao Paulo, Inst Fis Sao Carlos, Lab Cristalog Prot & Biol Estrutural, Av Dr Carlos Botelho 1465,Caixa Postal 369, BR-13560970 Sao Carlos, SP, Brazil TI - Crystallization and preliminary crystallographic analysis of N-acetylglucosamine 6-phosphate deacetylase from Escherichia coli AB - N-Acetylglucosamine 6-phosphate deacetylase (E.C. 3.5.1.25), an enzyme from Escherichia coli involved in aminosugar catabolism, has been crystallized by the vapour-diffusion technique using phosphate as precipitant. X-ray diffraction experiments show the crystals to belong to the orthorhombic crystal system, with space group P2(1)2(1)2. The unit-cell parameters are a = 82.09 (2), b = 114.50 (1), c = 80.17 (1) Angstrom. The crystals diffract to a maximum resolution of 1.8 Angstrom and an initial data set was collected to 2.0 Angstrom MH - Brazil MH - Mexico|Distrito Federal PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biophysics;Crystallography U5 - J;Article AV - English IS - 0907-4449 UR - ISI:000087106000027 L2 - PROTEIN CRYSTALLOGRAPHY; NAG REGULON; DEAMINASE; CRYOCRYSTALLOGRAPHY; PURIFICATION; GLUCOSAMINE; RESOLUTION; INDUCTION; STATE; K-12 SO - Acta Crystallographica Section D-Biological Crystallography 2000 ;56():670-672 658 UI - 15617 AU - Ferreira G AU - Terrazas A AU - Poindron P AU - Nowak R AU - Orgeur P AU - Levy F AD - INRA, Lab Comportement Anim, CNRS, URA 1291, F-37380 Nouzilly, FranceUNAM, UAQ, Ctr Neurobiol, Queretaro 76001, MexicoLevy, F, INRA, Lab Comportement Anim, CNRS, URA 1291, F-37380 Nouzilly, France TI - Learning of olfactory cues is not necessary for early lamb recognition by the mother AB - Ewes identify their young through the use of different sensory modalities. Olfactory recognition, which mediates selective acceptance at the udder, is established at 4 h postpartum (pp). Visual and auditory cues are involved in recognition at a distance, which is evident at 12 h pp. This study investigates whether anosmic awes are able (a) to develop visual and auditory recognition and (b) to restore selective acceptance of their lamb at the udder. Visual and auditory recognition was assessed in anosmic and intact ewes at 12 h and 24 h pp by a test of two choices: their own anti an alien lamb. Selectivity at allowing suckling was tested by presenting successively an alien and the familiar lamb at 3 h, 3 days, and 1 month pp. In the two-choice recognition test, at both 12 h and 24 h pp, anosmic as well as intact awes showed a preference for their familiar lamb. Although anosmic ewes showed no difference in their acceptance of alien and familiar lambs for suckling at 3, h and 3 days pp, they nursed the alien lamb less at 1 month pp and showed more rejection behaviors toward it. Thus, visual, auditory, or both those types of recognition can be rapidly established, independent of olfactory recognition. Moreover, differential behavior of anosmic ewes toward their own versus an alien lamb at the udder at 1 month suggests that vision and audition may compensate to some extent for the loss of olfaction. (C) 2000 Elsevier Science Inc. All rights reserved MH - France MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 26 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000088280800004 L2 - young recognition;olfaction;vision;audition;maternal behavior;sheep;SHEEP OVIS-ARIES; MATERNAL-BEHAVIOR; EWES; AGGRESSION; INDUCTION; ANOSMIA; CORTEX; SYSTEM; YOUNG; ODOR SO - Physiology & Behavior 2000 ;69(4-5):405-412 659 UI - 15710 AU - Ferro AA AU - Rosenzweig P AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Los Andes, Fac Ciencias, Grp Astrofis Teor, Merida 5101, VenezuelaUniv Los Andes, Fac Ciencias, Ctr Astrofis Teor, Merida 5101, VenezuelaFerro, AA, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - The intermediate-band approach to the surface-brightness method for Cepheid radii and distance determination AB - The surface-brightness parameter F-nu is calibrated in terms of the Stromgren intermediate-band colour b - y. The relation F-nu - (b - y)(o) valid for Cepheids is calibrated using accurate near-infrared radii and distances for selected Cepheids. We have obtained uvby photometry for non-Cepheid giant and supergiant stars with known angular diameters and compared the slope and zero-point of their F-nu - (b - y)(o) relation with the Cepheid calibration. We found that the two calibrations are significantly different. The theoretical models lie in between the two calibrations. It is remarked that F-nu-colour relations derived from non-Cepheids and involving blue colours (e.g. B - V or b - y) are not applicable to Cepheids, while those involving redder colours (e.g. V - R, V - K or V - J) also produce good radii for Cepheids. Selected Cepheids as calibrators lead to the accurate relation F-nu = 3.898(+/- 0.003) - 0.378(+/- 0.006)(b - y)(o), which allowed the calculation of radii and distances for a sample of 59 Galactic Cepheids. The uncertainties in the zero-point and slope of the above relation are similar to those obtained from near-infrared colours, and determine the accuracies in radii and distance calculations. While infrared light and colour curves for Cepheids may be superior in precision, the intermediate-band b-y colour allows the recovery of mean radii with an accuracy comparable to those obtained from the infrared solutions. The derived distances are consistent within the uncertainties with those predicted by a widely accepted period-luminosity relationship. Likewise, the resulting period-radius relation from the intermediate-band approach is in better agreement with infrared versions than with optical versions of this law. It is highlighted that the intermediate-band calibration of the surface-brightness method in this work is of comparable accuracy to the near-infrared calibrations. The present results stress the virtues of uvby in determining the physical parameters of supergiant stars of intermediate temperature MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000087941700011 L2 - stars : distances;stars : fundamental parameters;Cepheids;BRIGHTEST NORTHERN CEPHEIDS; STELLAR ANGULAR DIAMETERS; SMALL MAGELLANIC CLOUD; MILKY-WAY CEPHEIDS; CLASSICAL CEPHEIDS; SOUTHERN CEPHEIDS; SUPERGIANT STARS; COLOR EXCESSES; PHOTOMETRIC ABUNDANCES; BETA PHOTOMETRY SO - Monthly Notices of the Royal Astronomical Society 2000 ;315(2):296-306 660 UI - 16427 AU - Ferro R AU - Rodriguez JA AU - Vigil O AU - Morales-Acevedo A AU - Contreras-Puente G AD - IPN, CINVESTAV, Dept Ingn Elect, Mexico City 07360, DF, MexicoUniv La Habana, Fac Fis, La Habana 43100, CubaIPN, Escuela Super Fis & Matemat, Mexico City 07360, DF, MexicoMorales-Acevedo, A, IPN, CINVESTAV, Dept Ingn Elect, Avenida IPN 2508, Mexico City 07360, DF, Mexico TI - F-doped CdO thin films deposited by spray pyrolysis AB - Thin films of CdO were prepared by spray pyrolysis using cadmium acetate as the Cd source. The films were intentionally doped with fluorine by adding NH4F in the solution. The substrate temperature was varied in the range from 170 to 290 degrees C while keeping the other,deposition parameters constant, except the NH4F concentration in the solution, which was varied up to 8 wt%. The structural; optical, and electrical properties of the films were studied in order to obtain, under our experimental conditions, optimal values for the NH4F concentration and substrate temperature. We show that the best deposition conditions for a photovoltaic application of the films are substrate temperature T-s = 210 degrees C and NH4F concentration around 4% MH - Cuba MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 16 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000085649100017 L2 - ELECTRICAL-PROPERTIES; CELL; LAYER SO - Physica Status Solidi A-Applied Research 2000 ;177(2):477-483 661 UI - 15665 AU - Firmani C AU - D'Onghia E AU - vila-Reese V AU - Chincarini G AU - Hernandez X AD - Osservatorio Astron Brera, I-23807 Merate, LC, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Milan, I-20100 Milan, ItalyUniv Milano Bicocca, Milan, ItalyOsservatorio Astrofis Arcetri, I-50125 Florence, ItalyFirmani, C, Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, LC, Italy TI - Evidence of self-interacting cold dark matter from galactic to galaxy cluster scales AB - Within the framework of the cold dark matter (CDM) cosmogony, a central cusp in the density profiles of virialized dark haloes is predicted. This prediction disagrees with the soft inner halo mass distribution inferred from observations of dwarf and low surface brightness galaxies, and some clusters of galaxies. By analysing data for some of these objects, we find that the halo central density is nearly independent of the mass from galactic to galaxy cluster scales, with an average value of around 0.02 M. pc(-3). We show that soft cores can be produced in the CDM haloes by introducing a lower cut-off in the power spectra of fluctuations and assuming high orbital thermal energies during halo formation. However, the scale invariance of the halo central density is not reproduced in these cases. The introduction of self-interaction in the CDM particles offers the most attractive alternative to the core problem. We propose gravothermal expansion as a possible mechanism to produce soft cores in the CDM haloes with self-interacting particles. A global thermodynamical equilibrium can explain the central density scale invariance. We find a minimum cross-section capable of establishing isothermal cores in agreement with the observed shallow cores. If sigma is the cross-section, m(x) the mass of the dark matter particle and v the halo velocity dispersion, then sigma m(x) approximate to 4 x 10(-25)(100 km s(-1) v(-1)) cm(2) GeV-1 MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000088016100001 L2 - galaxies : clusters : general;galaxies : formation;galaxies : haloes;cosmology : theory;dark matter;MASS; EVOLUTION; HALOES SO - Monthly Notices of the Royal Astronomical Society 2000 ;315(3):L29-L32 662 UI - 15666 AU - Firmani C AU - vila-Reese V AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsservatorio Astron Brera, I-23807 Merate, ItalyNew Mexico State Univ, Dept Astron, Las Cruces, NM 88003, USAFirmani, C, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - Disc galaxy evolution models in a hierarchical formation scenario: structure and dynamics AB - We predict the internal structure and dynamics of present-day disc galaxies using galaxy evolution models within a hierarchical formation scenario. The halo mass aggregation histories, for a flat cold dark matter model with cosmological constant, were generated and used to calculate the virialization of dark matter haloes. A diversity of halo density profiles were obtained, the most typical one being close to that suggested by Navarro, Frenk & White. We modelled the way in which discs in centrifugal equilibrium are built within the evolving dark haloes, using gas accretion rates proportional to the halo mass aggregation rates, and assuming detailed angular momentum conservation. We calculated the gravitational interactions between halo and disc - including the adiabatic contraction of the halo due to disc formation - and the hydrodynamics, star formation and evolution of the galaxy discs. We find that the slope and zero-point of the Tully-Fisher (TF) relation in the infrared bands may be explained as a direct consequence of the cosmological initial conditions. This relation is almost independent of the assumed disc mass fraction, when the disc component in the rotation curve decomposition is non-negligible. Thus, the power spectrum of fluctuations can be normalized at galaxy scales through the TF relation independently of the disc mass fraction assumed. The rms scatter of the model TF relation originates mainly from the scatter in the dark halo structure and, to a minor extension, from the dispersion of the primordial spin parameter lambda. The scatter obtained from our models does not disagree with the observational estimates. Our models allow us to understand why the residuals of the TF relation do not correlate significantly with disc size or surface brightness. We can also explain why low and high surface brightness galaxies have the same TF relation; the key point is the dependence of the star formation efficiency on the disc surface density. The correlations between gas fraction and surface brightness, and between scalelength and V-max obtained with our models agree with those observed. Discs formed within the growing haloes, where lambda is assumed to be time independent, have nearly exponential surface density distributions. The shape of the rotation curves changes with disc surface brightness and is nearly flat for most cases. The rotation curve decompositions show a dominance of dark matter down to very small radii, in conflict with some observational inferences. The introduction of shallow cores in the dark halo attenuates this difficulty and produces haloes with slightly smaller rotation velocities. Other features of our galaxy models are not strongly influenced by the shallow core MH - Italy MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 42 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0035-8711 UR - ISI:000088016100007 L2 - galaxies : evolution;galaxies : formation;galaxies : haloes;galaxies : kinematics and dynamics;cosmology : theory;dark matter;DARK-MATTER HALOS; URSA-MAJOR CLUSTER; TULLY-FISHER RELATION; GALACTIC DISKS; GRAVITATIONAL COLLAPSE; ROTATION CURVES; STAR-FORMATION; EXPANDING UNIVERSE; SURFACE-BRIGHTNESS; SPIRAL GALAXIES SO - Monthly Notices of the Royal Astronomical Society 2000 ;315(3):457-472 663 UI - 15814 AU - Fisher LM AU - Il'enko KV AU - Kalinov AV AU - Leblanc MAR AU - Perez-Rodriguez F AU - Savel'ev SE AU - Voloshin IF AU - Yampol'skii VA AD - All Russian Elect Engn Inst, Moscow 111250, RussiaNAS, Inst Radiophys & Elect, UA-310085 Kharkov, UkraineUniv Ottawa, Dept Phys, Ottawa, ON K1N 6N5, CanadaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoFisher, LM, All Russian Elect Engn Inst, Moscow 111250, Russia TI - Suppression of the magnetic moment under the action of a transverse magnetic field in hard superconductors AB - The suppression of the static magnetic moment M of a superconducting plate in the critical state by a sweeping magnetic field (h) over right arrow(t), applied perpendicularly to a dc magnetic field H, has been studies experimentally and theoretically. For every quarter-period of a sweeping field h(T) of changing polarity with an amplitude h(0), a noticeable decrease of M can be observed both for the paramagnetic and diamagnetic initial states even for small h(0) compared to H. Numerical simulations within the framework of two existing theoretical approaches have been performed in order to study the evolution of the distribution of the magnetic induction and the suppression of the magnetic moment. It turns out that the Clem-Perez-Gonzalez double critical-state model describes this process qualitatively well in the first quarter-period for relatively high values of h(0). A significant disagreement with the experimental data is observed for small values of the transverse magnetic field. On the other hand, the two-velocity hydrodynamic model provides an adequate explanation of the main features of the suppression of M for both paramagnetic and diamagnetic states and any values of h(0) MH - Canada MH - Mexico|Puebla MH - Russia MH - Ukraine PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000087654100068 L2 - WEAK-LINK REGIME; II SUPERCONDUCTORS; HYSTERESIS LOSSES; TRANSPORT CURRENT; ROTATING-DISKS; CROSSED FLUX; HIGH-TC; FIELDS; COLLAPSE; DYNAMICS SO - Physical Review B 2000 ;61(22):15382-15391 664 UI - 15923 AU - Fisher LM AU - Kalinov AV AU - LeBlanc M AU - Perez-Rodriguez F AU - Savel'ev SE AU - Voloshin IF AU - Yampol'skii VA AD - All Russian Elect Engn Inst, Moscow 111250, RussiaUniv Ottawa, Ottawa, ON, CanadaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoNAS, Inst Radiophys & Elect, Kiev, UkraineFisher, LM, All Russian Elect Engn Inst, Krasnokazarmennaya St, Moscow 111250, Russia TI - Suppression of the magnetic moment of a hard superconductor under the action of a transverse magnetic field AB - The suppression of the magnetic moment M of a superconducting plate by a magnetic field It(t), changing in cycle, applied perpendicularly to a DC magnetic field H, has been observed and studied. Numerical simulations within the framework of two existing theoretical approaches have been performed. It is found that the double critical state model (Clem, Perez-Gonzalex, Phys. Rev. B 30 (1984) 5041) describes the process of the M(h) suppression qualitatively well in the first quarter-period for relatively high values of h, whereas the two-velocity hydrodynamic model (Voloshin et al., JETP 84 (1997) 592) describes adequately all main features of this phenomenon. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Puebla MH - Russia MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000087311700430 L2 - critical state;flux lines;force balance SO - Physica B 2000 ;284():863-864 665 UI - 16309 AU - Flambaum VV AU - Izrailev FM AD - Univ New S Wales, Sch Phys, Sydney, NSW 2052, AustraliaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoFlambaum, VV, Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia TI - Excited eigenstates and strength functions for isolated systems of interacting particles AB - Eigenstates in finite systems such as heavy nuclei and atoms, atomic clusters and quantum dots with few excited particles are known to be chaotic superposition of shell model basis states. Here we develop a method for description of this kind of eigenstates (ES) as well as of strength functions (SF). Using the model of n randomly interacting particles distributed over m orbitals we show that the average form of ES and SF in energy representation is given by the Breit-Wigner formula with the width Gamma which has a Gaussian dependence on energy. This explains evolution of ES and SF from the Breit-Wigner form for weak interaction to Gaussian form for strong interaction MH - Australia MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000085994000052 L2 - FINITE FERMI SYSTEMS; NUCLEAR SHELL-MODEL; BREIT-WIGNER WIDTH; COMPOUND STATES; QUASI-PARTICLE; WEAK PERTURBATIONS; STATISTICAL-THEORY; MATRIX-ELEMENTS; QUANTUM CHAOS; LOCALIZATION SO - Physical Review e 2000 ;61(3):2539-2542 666 UI - 14620 AU - Fletcher JM AU - Munguia L AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoFletcher, JM, CICESE, POB 434843, San Diego, CA 92143, USA TI - Active continental rifting in southern Baja California, Mexico: Implications for plate motion partitioning and the transition to seafloor spreading in the Gulf of California AB - Three major earthquake series have occurred during the past 30 years on fault systems that are spatially and kinematically distinct from oceanic spreading centers and transform faults in the southern Gulf of California. Focal mechanism solutions for earthquakes of the April 1969 and June 1995 series indicate nearly pure normal displacement across NNW striking planes. This seismicity falls along different strands of a major system of normal faults that extends at least 300 km along strike and defines the western limit of the Gulf Extensional Province. The dominant normal faults control distribution of Neogene basins and have been active since middle to late Miocene time. Epicenters of the August 1969 earthquake series lie south of the Baja California peninsula and focal mechanism solutions indicate strike-slip displacement. This seismic activity is likely related to active WNW striking faults in the continental borderland, which isolate Baja California as a microplate within the Pacific-North American plate boundary. Therefore, modern Pacific-North America plate motion is partitioned into at least three distinct fault systems: oceanic spreading centers and transforms in the Gulf of California, normal faults along the western margin of the Gulf of California, and faults along the Pacific margin of the Baja California peninsula. Kinematic partitioning of plate motion is required to accommodate the strongly three dimensional strain of transtensional rifting. Continental rifting and seafloor spreading have overlapped in time for the past 3.6 Myr., which also is likely attributed to the highly oblique kinematics of rifting MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 20 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0278-7407 UR - ISI:000165959800006 L2 - NORTH-AMERICA MOTION; FAULT TECTONICS; PACIFIC MARGIN; OF-CALIFORNIA; ZONE; EXTENSION; MIOCENE; DEFORMATION; EVOLUTION; BOUNDARY SO - Tectonics 2000 ;19(6):1107-1123 667 UI - 16560 AU - Fletcher JM AU - Kohn BP AU - Foster DA AU - Gleadow AJW AD - Ctr Invest Cient & Educ Super, Ensenada, Baja California, MexicoUniv Melbourne, Sch Earth Sci, Victorian Inst Earth & Planetary Sci, Parkville, Vic 3052, AustraliaUniv Florida, Dept Geol, Gainesville, FL 32611, USALa Trobe Univ, Dept Earth Sci, Melbourne, Vic, AustraliaFletcher, JM, Ctr Invest Cient & Educ Super, Ensenada, Baja California, Mexico TI - Heterogeneous Neogene cooling and exhumation of the Los Cabos block, southern Baja California: Evidence from fission-track thermochronology AB - The Los Cabos block is a massif of Mesozoic crystalline basement at the southern tip of the Baja California Peninsula and has long been considered a distinct tectonostratigraphic terrane separated from the rest of the peninsula by the La Paz fault along its western margin. Although the region is cut by an extensive array of active north-northwest-striking normal faults, none of them correspond to the proposed La Paz fault. The largest fault in the array and arguably one of the dominant Neogene structures in the Gulf extensional province is the San Jose del Cabo fault, which is an east-dipping normal fault that has a strike length of similar to 150 km, a topographic escarpment in excess of 1000 m, acid forms the eastern limit of the Los Cabos block. Apatite and zircon fission-track data demonstrate a marked difference in Neogene tectonism between the two margins of the Los Cabos block. Samples from the western margin, in the footwall of the proposed La Paz fault, indicate rapid Paleocene cooling (similar to 20 degrees C/m.y.), followed by essentially slow monotonic cooling (similar to 2-3 degrees C/m.y.) through the Tertiary. In contrast, samples from the eastern margin, in the footwall of the San Jose del Cabo fault, record rapid cooling (to similar to 45 degrees C/m.y.) related to tectonic exhumation across the fault commencing in the mid-Miocene (similar to 10-12 Ma), when the sampled rocks were at similar to 150 degrees C. The San Jose del Cabo fault accommodated similar to 5.2-6.5 km of exhumation at rates as high as similar to 1.5-2 mm/yr, but averaged 0.4-0.7 mm/yr. Continental rifting in the southern Gulf extensional province postdated the southward passage of the Rivera triple junction (ca, 12 Ma), which implies that driving forces were likely dominated by far-field plate kinematics and coupling between the Pacific, Farallon, and North America plates. This continental rifting has persisted through many inferred reconfigurations of plate motion: northward rotation of relative-motion vector (8 Ma), eastward migration of wrenching from the Pacific to the Gulf extensional province (6 Ma), and onset of sea-floor spreading (3.6 Ma) MH - Australia MH - Mexico|Baja California MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 14 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000085144300003 L2 - Gulf of California;fission-track dating;Los Cabos block;La Paz fault;San Jose del Cabo fault;GULF; PACIFIC; PLATE; APATITE; MOTION SO - Geology 2000 ;28(2):107-110 668 UI - 16274 AU - Floater GJ AU - Zalucki MP AD - Univ Queensland, Dept Zool & Entomol, St Lucia, Qld 4072, AustraliaFloater, GJ, Natl Autonomous Univ Mexico, Inst Ecol, Dept Ecol Evolut, Apartado Postal 70-275,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Habitat structure and egg distributions in the processionary caterpillar Ochrogaster lunifer: lessons for conservation and pest management AB - 1. The spatial and temporal distribution of eggs laid by herbivorous insects is a crucial component of herbivore population stability, as it influences overall mortality within the population. Thus an ecologist studying populations of an endangered butterfly can do little to increase its numbers through habitat management without knowledge of its egg-laying patterns across individual host-plants under different habitat management regimes. At the other end of the spectrum, a knowledge of egg-laying behaviour can do much to control pest outbreaks by disrupting egg distributions that lead to rapid population growth. 2. The distribution of egg batches of the processionary caterpillar Ochrogaster lunifer on acacia trees was monitored in 21 habitats during 2 years in coastal Australia. The presence of egg batches on acacias was affected by host-tree 'quality' (tree size and foliar chemistry that led to increased caterpillar survival) and host-tree 'apparency' (the amount of vegetation surrounding host-trees). 3. In open homogeneous habitats, more egg batches were laid on high-quality trees, increasing potential population growth. In diverse mixed-species habitats, more egg batches were laid on low-quality highly apparent trees, reducing population growth and so reducing the potential for unstable population dynamics. The aggregation of batches on small apparent trees in diverse habitats led to outbreaks on these trees year after year, even when population levels were low, while site-wide outbreaks were rare. 4. These results predict that diverse habitats with mixed plant species should increase insect aggregation and increase population stability. In contrast, in open disturbed habitats or in regular plantations, where egg batches are more evenly distributed across high-quality hosts, populations should be more unstable, with site-wide outbreaks and extinctions being more common. 5. Mixed planting should be used on habitat regeneration sites to increase the population stability of immigrating or reintroduced insect species. Mixed planting also increases the diversity of resources, leading to higher herbivore species richness. With regard to the conservation of single species, different practices of habitat management will need to be employed depending on whether a project is concerned with methods of rapidly increasing the abundance of an endangered insect or concerned with the maintenance of a stable, established insect population that is perhaps endemic to an area. Suggestions for habitat management in these different cases are discussed. 6. Finally, intercropping can be highly effective in reducing pest outbreaks, although the economic gains of reduced pest attack may be outweighed by reduced crop yields in mixed-crop systems MH - Australia MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Ecology U5 - J;Article AV - English IS - 0021-8901 UR - ISI:000086194600008 L2 - apparency;forest management;herbivore populations;oviposition;preference-performance;HERRICH-SCHAFFER LEPIDOPTERA; HOST PLANT-SELECTION; HERBIVOROUS INSECTS; SPECIALIST INSECT; DANAUS-PLEXIPPUS; URTICA-DIOICA; OVIPOSITION; CONSEQUENCES; THAUMETOPOEIDAE; BUTTERFLIES SO - Journal of Applied Ecology 2000 ;37(1):87-99 669 UI - 16197 AU - Flores-Farias R AU - Martinez-Bustos F AU - Salinas-Moreno Y AU - Chang YK AU - Hernandez JG AU - Rios E AD - Univ Autonoma Queretaro, Lab Invest Mat, Ctr Invest & Estudios Avanzados, IPN,Fac Quim,Ctr Univ, Queretaro 76010, MexicoINIFAP, Lab Nacl Maiz, Chapingo 56230, Mexico, MexicoUniv Estadual Campinas, Fac Engn Alimentos, Dept Tecnol Alimentos, BR-13083 Campinas, SP, BrazilIPN, CINVESTAV, Dept Biotecnol & Bioingn, Mexico City 07738, DF, MexicoMartinez-Bustos, F, Univ Autonoma Queretaro, Lab Invest Mat, Ctr Invest & Estudios Avanzados, IPN,Fac Quim,Ctr Univ, Cerro Campanas, Queretaro 76010, Mexico TI - Physicochemical and rheological characteristics of commercial nixtamalised Mexican maize flours for tortillas AB - Three commercial nixtamalised Mexican maize flours (CNMFs) designated HI-A, HI-B and HI-C were evaluated in this work. For each brand, four samples corresponding to four consecutive months of production were evaluated. Tortillas prepared by the traditional process of nixtamalisation were used as the control. The maize flours and their respective tortillas showed variations between samples in their physical, chemical and rheological parameters. The three commercial maize flours incorporated additives and preservatives. The moisture content, colour, pH, subjective water absorption capacity, water solubility index, water absorption index and swelling capacity of flours showed strong differences between the three CNMFs with respect to the chemical analysis. Important differences in the protein, calcium and amylose contents were observed. Tortillas from CNMFs had a blander maize flavour, less desirable texture and staled more rapidly than traditional tortillas. Some modifications are required in the current Official Mexican Quality Standard, principally in the appropriate selection of additives and levels used in the preparation of CNMFs. (C) 2000 Society of Chemical Industry MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Queretaro PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000086416900004 L2 - maize;flours;rheological characteristics;tortillas;MASA; AMYLOSE SO - Journal of the Science of Food and Agriculture 2000 ;80(6):657-664 670 UI - 15926 AU - Flores-Lopez LZ AU - Parra-Hake M AU - Somanathan R AU - Walsh PJ AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoUniv Penn, Dept Chem, Diane T Vagelos Labs, Philadelphia, PA 19104, USASomanathan, R, Inst Tecnol Tijuana, Ctr Grad & Invest, Apartado Postal 1166, Tijuana 22000, BC, Mexico TI - Structure/enantioselectivity study of the asymmetric addition of trimethylsilylcyanide to benzaldehyde catalyzed by Ti(IV)-Schiff base complexes AB - In the presence of titanium tetraisopropoxide, tridentate salen ligands derived from cis-1-amino-2-indanol have been utilized in the asymmetric addition of trimethylsilylcyanide to benzaldehyde, which gave the cyanohydrins in up to 85% ee. We have examined the reaction of titanium tetraisopropoxide with these salen ligands by NMR spectrometry and X-ray crystallography. Reaction of ligands derived from salicylaldehydes with bulky substituents in the 3-position with titanium tetraisopropoxide gave the L*Ti(O-i-Pr)(2) complexes, which are the proposed precatalysts in the asymmetric addition reaction. These ligands give good to very good enantioselectivity in the asymmetric trimethylsilylcyanation reaction. However, with groups smaller than tert-butyl in the 3-position, substantial amounts (up to 73%) of the catalytically inactive L-2*Ti species are formed, resulting in large drops in the ee's of the cyanohydrins. The L-2*Ti species were formed as mixtures of diastereomers, one of which has been characterized by X-ray crystallography. The crystal structure shows the titanium to be bonded to two ligands with a pseudo-octahedral coordination geometry. The ligands are bound in a meridional fashion and the complex is C-2-symmetric. Use of 2 equiv of ligand relative to titanium tetraisopropoxide resulted in significant reductions in the ee of the cyanohydrin product, presumably due to formation of increased amounts of the inactive diastereomeric L-2*Ti complexes MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000087292200014 L2 - TITANIUM ALKOXIDE COMPLEXES; HIGH OPTICAL PURITY; ENANTIOSELECTIVE TRIMETHYLSILYLCYANATION; STEREOSELECTIVE SYNTHESIS; LEWIS ACID; ALDEHYDES; CYANIDE; CYANOHYDRINS; (R)-CYANOHYDRINS; CYANOTRIMETHYLSILANE SO - Organometallics 2000 ;19(11):2153-2160 671 UI - 15678 AU - Flores-Ramirez S AU - Urban-Ramirez J AU - Miller RD AD - Univ New Mexico, Dept Biol, Albuquerque, NM 87131, USAUniv Autonoma Baja California, Dept Biol Marina, La Paz, BCS, MexicoMiller, RD, Univ New Mexico, Dept Biol, Albuquerque, NM 87131, USA TI - Major histocompatibility complex class I loci from the gray whale (Eschrichtius robustus) AB - Sequences from exons encoding the peptide binding region of MHC class I (MHC-I) molecules were isolated from California gray whale (Eschrichtius robustus) genomic DNA to initiate an investigation of variation in these genes in a cetacean. These represent the first mysticete MHC-I sequences to be reported. The analysis of gray whale MHC-I sequences suggests the presence of at least three loci, which share greatest similarity to MHC-I in the ungulates, consistent with current views on cetacean phylogenetics. The peptide binding region of MHC is the most polymorphic part of the molecule and analysis of the variation and synonymous to nonsynonymous substitution ratios in gray whale sequences found these genes to display polymorphism characteristics similar to that attributed to selection in other species MH - Mexico|Baja California Sur MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0022-1503 UR - ISI:000088149000002 L2 - LIMITED MHC POLYMORPHISM; DELPHINAPTERUS-LEUCAS; SEQUENCE VARIATION; EVOLUTION; DIVERSITY; MOLECULES; SELECTION; BIOLOGY; CATTLE SO - Journal of Heredity 2000 ;91(4):279-282 672 UI - 14701 AU - Flores-Villela O AU - Kjer KM AU - Benabib M AU - Sites JW AD - Brigham Young Univ, Dept Zool, Provo, UT 84602, USABrigham Young Univ, ML Bean Museum, Provo, UT 84602, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoRutgers State Univ, Cook Coll, Dept Entomol, New Brunswick, NJ 08903, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoSites, JW, Brigham Young Univ, Dept Zool, Provo, UT 84602, USA TI - Multiple data sets, congruence, and hypothesis testing for the phylogeny of basal groups of the lizard genus Sceloporus (squamata, phrynosomatidae) AB - Several data partitions, including nuclear and mitochondrial gene sequences, chromosomes, isoenzymes, and morphological characters, were used to propose a new phylogeny and to test previously published hypotheses about the phylogenetic positions of basal clades of the lizard genus Sceloporus and the relationship of Sceloporus to the former genus "Sator". In accord with earlier studies, our results grouped "Sator" as internal to Sceloporus, and both support a hypothesis of transgulfian vicariance for the origin of the former genus "Sator" on islands in the Sea of Cortez. Robustness of support for internal nodes in our best tree was established though widely used indices (bootstrap proportions, decay values) but also through congruence among independent data partitions. Several deep nodes in the tree recovered by several methods, including equally weighted and differentially weighted parsimony and maximum likelihood models, are only weakly supported by the traditional indices. This methodological concordance is taken as evidence for insensitivity of the deep structure of the topology to alternative assumptions MH - Mexico|Distrito Federal MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 29 U4 - Evolutionary Biology U5 - J;Article AV - English IS - 1063-5157 UR - ISI:000165797000007 L2 - biogeography;character congruence;maximum likelihood;parsimony;phylogeny;Sceloporus;weighted parsimony;RIBOSOMAL-RNA STRUCTURES; COMBINING DATA SETS; MAXIMUM-LIKELIHOOD; DNA-SEQUENCES; NUCLEOTIDE SUBSTITUTION; SECONDARY STRUCTURE; PROTEIN VARIATION; EVOLUTION; CHARACTERS; PARSIMONY SO - Systematic Biology 2000 ;49(4):713-739 673 UI - 16058 AU - Flores C AU - Cabrera E AU - Calderon T AU - Munoz E AU - Adem E AU - Hernandez J AU - Boldu J AU - Ovalle P AU - Murrieta H AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Madrid, Fac Ciencias, Dpto Quim Agr Geol Geoquim, Cantoblanco 28049, SpainMurrieta, H, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - ESR and optical absorption studies of gamma- and electron-irradiated sugar crystals AB - Electron spin resonance (ESR) studies of the free radicals induced in gamma- or electron-irradiated sugar crystals were performed, The number of radicals increases linearly, pointing out that this material can be used as a dosimeter. The optical absorption studies show the presence of several distinctive bands in the infrared and UV region, whose intensity changes with the irradiation dose. An interpretation of these results in terms of the formation of free radicals and possible crosslinking along the sugar molecular chains is presented. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000086953700036 L2 - CORN SO - Applied Radiation and Isotopes 2000 ;52(5):1229-1234 674 UI - 16135 AU - Flores JA AU - Veliz FG AU - Perez-Villanueva JA AU - de la Escalera GM AU - Chemineau P AU - Poindron P AU - Malpaux B AU - Delgadillo JA AD - Univ Autonoma Agr Antonio Narro, Dept Ciencias Med Vet, Torreon, Coahuila, MexicoUniv Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla, Queretaro, MexicoINRA, PRMD, F-37380 Nouzilly, FranceDelgadillo, JA, Univ Autonoma Agr Antonio Narro, Dept Ciencias Med Vet, Carretera Santa Fe & Perifer,Apartado Postal 940, Torreon, Coahuila, Mexico TI - Male reproductive condition is the limiting factor of efficiency in the male effect during seasonal anestrus in female goats AB - Two experiments were conducted to determine whether the failure of males to induce sexual activity in goats during seasonal anestrus is due to unresponsiveness of females to male stimulus or insufficient stimulation from males. In the first study, one group of males (sexually inactive, SI; n = 4) was kept under natural photoperiod while the other (sexually active, SA; n = 4) was subjected to 2.5 mo of long days (16L:8D) and received 2 s.c. implants of melatonin. Two mo later, 2 different flocks of anovulatory goats previously separated from bucks were exposed to either SI (n = 34) or SA (n = 40) bucks. Progesterone assays and estrous behavior were used to determine ovarian and behavioral responses of the females to teasing. Of the goats exposed to SI males, only 2 ovulated, and none showed estrous behavior during the 35 days of the study. In contrast, all females (40 of 40) in contact with SA males ovulated and showed at least one estrous behavior during the first 11 days following male introduction (P < 0.001). Overall, 38 of 40 females stimulated with SA bucks were diagnosed pregnant at Day 35, according to progesterone assay (versus 0 in SI-treated group: P < 0.001). To control for a possible difference of responsiveness between flocks, the experiment was repeated 1 yr later using a single flock of goats divided into 2 groups. Again, over the first 14 days, 1 of 33 goats showed estrous behavior in the SI-treated group versus 27 of 33 in the SA-treated group (P < 0.001). Therefore, treating bucks with long days and melatonin increased their teasing capacity to induce sexual activity in females during anestrus. These results indicate that the absence of response to teasing at this time of the year is not due to female unresponsiveness, but to insufficient stimulation from the male MH - France MH - Mexico|Coahuila MH - Mexico|Queretaro PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 15 U4 - Reproductive Biology U5 - J;Article AV - English IS - 0006-3363 UR - ISI:000086679400040 L2 - AUSTRALIAN CASHMERE GOAT; SHORT PHOTOPERIODIC CYCLES; ANOVULATORY GOATS; SEXUAL-BEHAVIOR; ESTROUS FEMALES; LH-SECRETION; CREOLE GOATS; OVULATION; INDUCTION; EWES SO - Biology of Reproduction 2000 ;62(5):1409-1414 675 UI - 15484 AU - Flores M AU - Mavingui P AU - Perret X AU - Broughton WJ AU - Romero D AU - Hernandez G AU - Davila G AU - Palacios R AD - Natl Univ Mexico, Nitrogen Fixat Res Ctr, Cuernavaca 62170, Morelos, MexicoUniv Geneva, Lab Biol Mol Plantes Super, CH-1292 Chambesy Geneva, SwitzerlandPalacios, R, Ave Univ S-N,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Prediction, identification, and artificial selection of DNA rearrangements in Rhizobium: Toward a natural genomic design AB - Based on the DNA sequence of the symbiotic plasmid of Rhizobium strain NGR234, we predicted potential rearrangements generated by homologous recombination. All predicted rearrangements were identified experimentally by using a PCR-based methodology. Thus, the predicted and the actual dynamic maps of the replicon coincide. By using an approach that does not involve the introduction of exogenous genetic elements, derivative populations that are pure for specific rearrangements were obtained. We propose that knowledge of the DMA sequence of a genome offers the possibility of designing pathways of sequential rearrangements leading to alternative genomic structures. An experimental strategy to isolate bacterial populations containing the desired structures is discussed MH - Mexico|Morelos MH - Switzerland PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 25 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000088608000069 L2 - SP. STRAIN NGR234; PLASMID; PROKARYOTES; SEQUENCES; EVOLUTION; BACTERIA SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(16):9138-9143 676 UI - 15020 AU - Floros J AU - Lin HM AU - Garcia A AU - Salazar MA AU - Guo XX AU - DiAngelo S AU - Montano M AU - Luo JM AU - Pardo A AU - Selman M AD - Penn State Univ, Coll Med, Dept Cellular & Mol Physiol, Hershey, PA 17033, USAPenn State Univ, Coll Med, Dept Pediat, Hershey, PA 17033, USAPenn State Univ, Coll Med, Dept Hlth Evaluat Sci, Hershey, PA 17033, USAUniv Nacl Autonoma Mexico, Inst Nacl Enfermedades Resp, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoFloros, J, Penn State Univ, Coll Med, Dept Cellular & Mol Physiol, H166,POB 850,500 Univ Dr, Hershey, PA 17033 USA TI - Surfactant protein genetic marker alleles identify a subgroup of tuberculosis in a Mexican population AB - Pulmonary surfactant and its components are essential for normal lung function and are involved in local host defense, Surfactant protein (SP)-A and SP-D bind to and modulate phagocytosis of Mycobacterium tuberculosis by macrophages. Frequency comparisons of SP marker alleles in tuberculosis patients and healthy control subjects (tuberculin-skin test positive or general population) were performed, Regression analyses of the tuberculosis and the tuberculin-skin test positive groups revealed, on the basis of odds ratios, tuberculosis susceptibility (DA11_C and GATA_3) and protective (AAGG_2) marker alleles, Similarly, between tuberculosis patients and general population control subjects, susceptibility 1A(3), 6A(4), and B1013_A and protective AAGG_1, and AAGG_7 marker alleles were observed, Moreover, interactions were seen between alleles 6A(2) and 1A(3) (P = .0064) and between 1A(3) and B1013_A (P = .036), The findings indicate a possible involvement of SP alleles in tuberculosis pathogenesis MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 56 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000090106000024 L2 - HUMAN SP-A; MYCOBACTERIUM-TUBERCULOSIS; ALVEOLAR MACROPHAGES; PHAGOCYTOSIS; ATTACHMENT; LOCUS; OZONE SO - Journal of Infectious Diseases 2000 ;182(5):1473-1478 677 UI - 15569 AU - Fogagnolo JB AU - Robert MH AU - Ortiz JL AU - Amigo V AU - Torralba JM AD - Univ Estadual Campinas, BR-13028397 Campinas, SP, BrazilInst Tecnol & Estud Super Monterrey, Queretaro 76130, MexicoUniv Politecn Valencia, Valencia 46022, SpainUniv Carlos III Madrid, Madrid 28911, SpainFogagnolo, JB, Univ Estadual Campinas, Ciudad Univ Campinas, BR-13028397 Campinas, SP, Brazil TI - Obtaining aluminium matriz composities reinforced with nitrides by powder metallurgy AB - The use of aluminium metal matrix composites as structural materials is increasing continuously, mainly in the automotive and aerospace industries. The development of new kind of reinforcements is one of the areas of greater interest in current researches. This work investigates the use of nitrides as reinforcement for composite materials, with Al 6061 matrix, obtained by powder metallurgy and extrusion, presenting their microstructural features and their mechanical characteristics MH - Brazil MH - Mexico|Queretaro MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000088543200022 L2 - metal matrix composites;powder metallurgy;extrusion SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2000 ;39(4):503-505 678 UI - 16311 AU - Foldvari I AU - Munoz A AU - Camarillo E AU - Peter A AU - Soza R AD - Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1121 Budapest, HungaryUniv Autonoma Metropolitana Iztapalapa, Dept Phys, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Dept Phys, Mexico City 04510, DF, MexicoFoldvari, I, Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Konkoly Thege 29-33, H-1121 Budapest, Hungary TI - Basic optical absorption of Er in Bi2TeO5 single crystals AB - The basic absorption spectra of Er in Bi2TeO5 crystals are presented and analyzed, Eight transitions were identified from the I-4(15/2) ground state with all the possible Stark components at 10 K, Further splitting of the lines indicated three major sites for Er3+ in the crystal. Transitions from the higher Stark levels of the ground state were identified at 200 K, The spectroscopic observations are in good agreement with previous results on oxide crystals exhibiting similar coordination number and symmetry. (C) 2000 Elsevier Science B.V. All rights reserved MH - Hungary MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000086044900007 L2 - bismuth tellurite;Bi2TeO5;Er-dopant;absorption spectra SO - Optical Materials 2000 ;14(2):137-144 679 UI - 14902 AU - Font J AU - Jimenez S AU - Cervera R AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Campdelacreu J AU - Ingelmo M AD - Hosp Clin Barcelona, Unitat Malaties Autoimmunes Sistem, Hosp Clin Barcelona,Inst Invest Biomed August Pi, Sch Med,Syst Autoimmune Dis Unit,Dept Med, E-08036 Barcelona, SpainBenemerita Univ Puebla, Sch Med, Dept Immunol, Puebla, MexicoFont, J, Hosp Clin Barcelona, Unitat Malaties Autoimmunes Sistem, Hosp Clin Barcelona,Inst Invest Biomed August Pi, Sch Med,Syst Autoimmune Dis Unit,Dept Med, C Villarroel 170, E-08036 Barcelona, Spain TI - Splenectomy for refractory Evans' syndrome associated with antiphospholipid antibodies: report of two cases AB - The main haematological manifestations seen in patients with antiphospholipid antibodies (aPL) are thrombocytopenia, usually mild, and haemolytic anaemia with a positive Coombs test. Owing to the shared characteristics with idiopathic thrombocytopenic purpura, similar rules are followed in the treatment of these cytopenias. Two patients with severe aPL associated cytopenias, who required splenectomy after being refractory to steroids, immunosuppressive agents, and other treatments (intravenous gammaglobulin, danazol), are described, and previously reported cases are reviewed MH - Mexico|Puebla MH - Spain PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 5 U4 - Rheumatology U5 - J;Article AV - English IS - 0003-4967 UR - ISI:000165350500017 L2 - SYSTEMIC-LUPUS-ERYTHEMATOSUS; IDIOPATHIC THROMBOCYTOPENIC PURPURA; ANTICARDIOLIPIN ANTIBODIES; ISOTYPE DISTRIBUTION; THROMBOSIS; MEMBRANES; FEATURES; SERIES SO - Annals of the Rheumatic Diseases 2000 ;59(11):920-923 680 UI - 16360 AU - Fonthal G AU - Tirado-Mejia L AU - Marin-Hurtado JI AU - riza-Calderon H AU - Mendoza-Alvarez JG AD - Univ Quindio, Lab Optoelect, Armenia, ColombiaUniv Zulia, Dept Fis, Maracaibo 4011, VenezuelaIPN, CINVESTAV, Dept Fis, Mexico City 07738, DF, MexicoFonthal, G, Univ Quindio, Lab Optoelect, Armenia, Colombia TI - Temperature dependence of the band gap energy of crystalline CdTe AB - In this paper we report the band gap energy value in CdTe single crystals by measuring the free exciton energy in the photoluminescence spectra taken at different temperatures and for two laser light intensities. The results have been analyzed using the Manoogian-WooIey (M-W) equation; by comparing them with the expression proposed by Vina; and using Varshni's expression for temperature variation of the band gap energy. The best fit was obtained with the M-W equation, and in relation with the UTs term in this equation, our analysis showed an s-value close to the unity, as has been reported for other materials. The value of U was very close to the theoretical prediction involving the product of the thermal expansion coefficient and the deformation potential of the material. From the term related to the electron-phonon interaction, we obtained a Debye temperature close to the tabulated value. Fitting the experimental data to the theoretical expression for E-g(T), the band gap energy for a temperature of 4.2 K was calculated to be 1.6065 eV in agreement with the well-established value for this material; a band gap energy of 1.5125 eV is proposed for a temperature of 300 K. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Colombia MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000085842100012 L2 - semiconductors;gap energy;optical properties;OPTICAL-PROPERTIES; PHOTOLUMINESCENCE; ALLOYS; CD1-XZNXTE; EDGE; LUMINESCENCE; BULK; GAAS SO - Journal of Physics and Chemistry of Solids 2000 ;61(4):579-583 681 UI - 14722 AU - Forbes GW AU - Man'ko VI AU - Ozaktas HM AU - Simon R AU - Wolf KB AD - Macquarie Univ, Dept Phys, N Ryde, NSW 2109, AustraliaRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaBilkent Univ, Dept Elect Engn, TR-06533 Bilkent, Ankara, TurkeyInst Math Sci, Tharamani 600113, Chennai, IndiaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62551, Morelos, MexicoForbes, GW, Macquarie Univ, Dept Phys, N Ryde, NSW 2109, Australia TI - Wigner distributions and phase space in optics MH - Australia MH - India MH - Mexico|Morelos MH - Russia MH - Turkey PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Editorial Material AV - English IS - 0740-3232 UR - ISI:000165752300018 SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(12):2273-2274 682 UI - 14589 AU - Fordham JLA AU - Kawakami H AU - Michel RM AU - Much R AU - Robinson JR AD - Univ Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, EnglandObserv Astron Nacl, Inst Astron, Ensenada 22860, Baja California, MexicoEuropean Space Agcy, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, NetherlandsFordham, JLA, Univ Coll London, Dept Phys & Astron, Gower St, London WC1E 6BT, England TI - High time-resolution spectroscopic imaging using intensified CCD detectors AB - The micro-channel plate intensified CCD photon counting detector developed at University College London has been upgraded to allow time-resolved spectroscopic optical data to be acquired on periodical sources such as pulsars, First observing trials have been carried out, acquiring spectroscopic data on the Crab pulsar. The detector was phase locked to the pulsar period and a temporal resolution of 41.4 mus employed. The phase locking allowed the coaddition of time slices over a large number of pulsar periods to build up quantifiable spectroscopic data when observing in a flux-limited regime MH - United Kingdom MH - Mexico|Baja California MH - Netherlands PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000166112300010 L2 - instrumentation : detectors;methods : observational;techniques : miscellaneous;PHOTON-COUNTING DETECTORS; CRAB PULSAR; OPTICAL/UV MONITOR; ULTRAVIOLET; TELESCOPE SO - Monthly Notices of the Royal Astronomical Society 2000 ;319(2):414-418 683 UI - 14844 AU - Forget G AU - Sanchez-Bain A AU - Arkhipchuk V AU - Beauregard T AU - Blaise C AU - Castillo G AU - Castillo LE AU - az-Baez MC AU - Pica-Granados Y AU - Ronco A AU - Srivastava RC AU - Dutka BJ AD - IDRC, EcoHlth, Ottawa, ON K1H 3H9, CanadaNatl Acad Sci, Inst Hydrobiol, UA-254210 Kiev, UkraineSt Laurence River Inst Environm Sci, Cornwall, ON K6H 1E1, CanadaEnvironm Canada, Ctr St Laurent, Montreal, PQ H2Y 2E7, CanadaUniv Chile, Dept Civil Engn, Santiago, ChileUniv Nacl, IRET, Cent Amer Inst Studies Tox Subst, Heredia, Costa RicaUniv Nacl Colombia, Fac Ingn, Bogota, ColombiaInst Mexicano Tecnol Agua, Cuernavaca 62550, Morelos, MexicoNatl Univ La Plata, Fac Ciencias Exactas, RA-1900 La Plata, ArgentinaAll India Inst Hyg & Publ Hlth, Calcutta 700073, W Bengal, IndiaEnvironm Canada, Natl Water Res Inst, Burlington, ON L7R 4A6, CanadaForget, G, IDRC, EcoHlth, Ottawa, ON K1H 3H9, Canada TI - Preliminary data of a single-blind, multicountry trial of six bioassays for water toxicity monitoring AB - Simple and affordable, yet sensitive and reliable batteries of bioassays for water toxicity testing in developing countries are still not available. The International Development Research Centre (IDRC, Canada) created an international network of laboratories (WaterTox) whose goal is to identify and test a battery of bioassays which could serve that purpose. Eight laboratories from both developing and industrialized countries undertook a standardization and calibration exercise which involved the testing of 24 samples (simple blind design) over the course of a year. The samples were either organic or inorganic toxicants, or mixtures of the two. The bioassays used were the onion root bundle growth assay, the lettuce seed germination assay (root and seedling length), the Daphnia 48 h mortality assay, the Hydra 96 h mortality assay, the Muta-Chromoplate mutagenicity test, and the nematode maturation 96 h assay. Based on test performance, reproducibility, and user-friendliness, inclusion of three of the bioassays in a simplified battery is recommended: lettuce seed germination, Daphnia, and Hydra. A fourth test, the onion bulb bioassay, was also found to be compatible with the criteria used in selecting the battery. The results of two parallel projects were also described: the standardization of an algal micro assay (Selenastrum sp) and the screening of alternative concentration procedures which could increase the ability of the tests to detect low levels of contaminants in environmental water samples. (C) 2000 by John Wiley & Sons, Inc MH - Argentina MH - Canada MH - Chile MH - Colombia MH - Costa Rica MH - India MH - Mexico|Morelos MH - Ukraine PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Toxicology;Water Resources U5 - J;Article AV - English IS - 1520-4081 UR - ISI:000165446600002 L2 - water;toxicity-testing;Daphnia;Hydra;Allium;Lactuca;Panagrellus;developing countries;pollutants;bioassays SO - Environmental Toxicology 2000 ;15(5):362-369 684 UI - 15400 AU - Forker M AU - Hutten U AU - Muller M AD - Univ Bonn, Inst Strahlen & Kernphys, D-53115 Bonn, GermanyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoForker, M, Univ Bonn, Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany TI - Ta-181 perturbed-angular-correlation study of electric quadrupole interactions in yttrium metal and yttrium-hydrogen solid solutions AB - The perturbed-angular-correlation (PAC) technique has been used to study the electric quadrupole interaction (QI) of the nuclear probe Ta-181 in yttrium metal and yttrium-hydrogen solid solutions alpha-YHx with 0 less than or equal to x less than or equal to 0.2. The temperature dependence of the quadrupole frequency v(q) of Ta-181 in yttrium metal, measured in the range 290 K less than or equal to T less than or equal to 1700 K, follows the linear relation v(q)(T) = v(q)(0)(1 - AT) with v(q)(0) = 423(3) MHz and A = 4.74(4) x 10(-4) K-1 The absorption of hydrogen enhances the temperature dependence of the QI: the parameters v(q)(0) and A of the linear temperature variation of the Ta-181 QI in alpha-YHx measured between 25 K and 1000 K for 0 less than or equal to x less than or equal to 0.2 both increase with increasing concentration x. These trends are consistent with the anionic model of the electronic state of hydrogen in rare earth metals. At T greater than or equal to 500 K a dynamic QI caused by diffusing hydrogen has been observed. The activation energy for hydrogen jumps in alpha-YH0.10 to deduced from the temperature dependence of the quadrupole relaxation rate is E-a = 0.49(15) eV MH - Germany MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000088933500015 L2 - FIELD GRADIENT; DIFFUSION; HFV2HX SO - Journal of Physics-Condensed Matter 2000 ;12(31):7117-7131 685 UI - 15691 AU - Fornoni J AU - Nunez-Farfan J AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Nacl Cordoba, RA-5000 Cordoba, ArgentinaFornoni, J, Univ Nacl Autonoma Mexico, Inst Ecol, Apartado Postal 70-275, Mexico City 04510, DF, Mexico TI - Evolutionary ecology of Datura stramonium: Genetic variation and costs for tolerance to defoliation AB - The incorporation of plant tolerance after damage as a new alternative to cope with herbivory, as opposed to resistance, opened new avenues for our understanding of coevolution between plants and herbivores. Although genetic variation on tolerance to defoliation has been detected in some species, few studies have been undertaken with nonagricultural species. In this study, we explore in the annual weed Datura stramonium the existence of genetic variation for tolerance and fitness costs of tolerance. To determine which fitness-related trait was responsible for possible differences in tolerance, growth rate, total flower and fruit production, and the number of seeds per fruit were recorded. Inbred line replicates of D. stramonium from a population of Mexico City were exposed to four defoliation levels (0%, 10%, 30%, and 70%). Our results from a greenhouse experiment using controlled genetic material (inbred lines) indicated that significant genetic variation for tolerance was detected across defoliation environments. Defoliation reduced plant fitness from 15% to 25% in the highest levels of defoliation. Differences on tolerance among inbred lines were accounted by a differential reduction in the proportion of matured fruits across defoliation levels (up to 20%). Within defoliation levels, significant genetic variation in plant fitness suggests that tolerance could be selected. The correlation between fitness values of inbred lines in two environments (with and without damage) was positive (r(g) = 0.77), but not significant, suggesting absence of fitness costs for tolerance. The finding of genetic variation on tolerance might be either due to differences among inbred lines in their capability to overcome foliar damage through compensation or due to costs incurred by inducing secondary metabolites. Our results indicate the potential for norms of reaction to be selected under a gradient of herbivory pressure and highlights the importance of dissecting induced from compensatory responses when searching for potential causes of genetic variation on tolerance MH - Argentina MH - Mexico|Distrito Federal PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 23 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000088090600007 L2 - costs;Datura stramonium;genotype X environment interactions;herbivory;phenotypic plasticity;tolerance;PHENOTYPIC PLASTICITY; QUANTITATIVE GENETICS; POLYGONUM-PERSICARIA; NATURAL ENEMIES; PLANT TOLERANCE; RESISTANCE; HERBIVORY; ENVIRONMENT; RESPONSES; GENOTYPE SO - Evolution 2000 ;54(3):789-797 686 UI - 14979 AU - Franco J AU - Kurtz S AU - Hofner P AU - Testi L AU - Garcia-Segura G AU - Martos M AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Puerto Rico, Dept Phys, Rio Piedras, PR 00931, USAArecibo Observ, Natl Astron & Ionosphere Ctr, Arecibo, PR 00612, USAOsservatorio Astrofis Arcetri, I-50125 Florence, ItalyFranco, J, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264,Cd Univ, Mexico City 04510, DF, Mexico TI - The density structure of highly compact HII regions AB - We report the density structure of the ultracompact (UC) H II regions G35.20-1.74, G9.62+0.19-E, and G75.78+0.34-H2O. The density profiles are derived from radio continuum emission at wavelengths from 6 to 0.3 cm. In the case of G35.20-1.74, a cometary UC H II region with a core and a tail, the spectrum of the core varies as S-nu proportional to nu (0.6), implying that the density structure is n(e) proportional to r(-2). The emission from the tail has a flatter spectrum, indicating that the density gradient is also negative but shallower. For the case of G9.62+0.19, which is an H II region complex with several components, the spectrum of the region designated component E is S-nu proportional to nu (0.95) corresponding to n(e) proportional to r(-2.5). The steepest spectral index, S-nu proportional to nu (1.4), is for the super UC H II region G75.78+0.34-H2O; its density stratification may be as steep as n(e) proportional to r(-4). The actual density gradient may be smaller, owing to an exponential (rather than a power-law) density distribution or to the effects of finite spatial extent. The contribution from dust emission and some of the possible implications of these density distributions are briefly discussed MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165095700017 L2 - HII regions;ISM : clouds;radio continuum : ISM;H-II REGIONS; DARK CLOUDS; MASSIVE STARS; ULTRACOMPACT; EMISSION; PHOTOEVAPORATION; G9.62+0.19; EVOLUTION; AMMONIA; DISKS SO - Astrophysical Journal 2000 ;542(2):L143-L146 687 UI - 15319 AU - Franco J AU - Kurtz SE AU - Garcia-Segura G AU - Hofner P AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Puerto Rico, San Juan, PR 00936, USAArecibo Observ, NAIC, Arecibo, PR, USAFranco, J, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - The evolution of HII regions AB - Here we review some recent results on the observed properties of UCHII regions, and on the new class of Super-ultra-compact HII regions, and describe the theoretical scheme for HII region expansion, from star-forming cloud cores to the more diffuse external medium. High-pressure cores can stop the expansion on relatively short time scales, of the order of 3x 10(4) yr, and the resulting pressure equilibrium UCHII regions have small sizes and large ion densities. If the ionization front enters into the decreasing density gradient of the cloud core, the expansion is accelerated and the HII region "pops'' out of the core and becomes a "blister''-like region. The properties of the outflows depend on the cloud density structure, and a variety of different shocks can be formed. Density inhomogeneities inside photoionized regions are smoothed out on short time scales, but new clumps are continuously created at the cool shell generated by the shock front. Instabilities in both the ionization and shock fronts cause the fragmentation of the shell, maintaining the presence of clumps during the whole evolution MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000089142200023 L2 - H-II REGIONS; IRAS POINT SOURCES; MOLECULAR CLOUDS; RADIO-CONTINUUM; STAR-FORMATION; STELLAR WINDS; PI REGIONS; ULTRACOMPACT; CORES; MORPHOLOGIES SO - Astrophysics and Space Science 2000 ;272(1-3):169-179 688 UI - 15232 AU - Franklin ME AU - Diaz-E J AU - Abrego D AU - Parra-Davila E AU - Glass JL AD - Univ Texas, Texas Endosurg Inst, San Antonio, TX 78222, USAUniv Texas, Dept Surg, San Antonio, TX 78222, USAHosp San Jose Tec Monterrey, Dept Surg, Monterrey, Nuevo Leon, MexicoHosp San Jose Tec Monterrey, Texas Endosurg Inst, Monterrey, Nuevo Leon, MexicoSE Baptist Hosp, Texas Endosurg Inst, San Antonio, TX, USAJackson Mem Hosp, Texas Endosurg Inst, Miami, FL 33136, USAFranklin, ME, Univ Texas, Texas Endosurg Inst, 4242 E Southcross,Suite 1, San Antonio, TX 78222 USA TI - Laparoscopic-assisted colonoscopic polypectomy - The Texas Endosurgery Institute experience AB - PURPOSE: The advent of laparoscopic surgery has altered the manner by which surgical specialties address pathologies of the abdominal cavity. This advance in technology has also changed colorectal surgery. One of the more common procedures of colorectal surgery is segmental resection for polyps that are large, broad based, or inaccessible for colonoscopic removal. We present a technique combining colonoscopy and laparoscopy to remove troublesome polyps without the need for segmental resections. METHODS: From May 1990 to September 1999 laparoscopic-monitored colonic polypectomies were performed in 47 patients, with a total of 60 polyps being removed. After laparoscopic mobilization of the involved segment of the colon, the proximal bowel is cross-clamped and the colonoscope passed to the involved portion of the colon. The polyp is then presented to the colonoscopist by the laparoscopist facilitating removal. The serosal surface is monitored for any indications of transluminal injury, and the area is repaired if needed. All polyps undergo immediate frozen section analysis. If the pathologic evaluation indicates malignancy then a segmental resection may be performed, otherwise the patients are decompressed and fed within a short time before discharge. RESULTS: The polyps were located most commonly in the ascending colon (18 polyps), transverse colon (12 polyps), and cecum (12 polyps). The most common histopathologic diagnosis was tubulovillous adenoma in 28 polyps followed by villous adenoma in 11 polyps. In three cases histopathologic diagnosis revealed malignancy necessitating segmental resection (1 low anterior resection and 2 right hemicolectomies), which were performed laparoscopically. Patients received a liquid diet within 6 hours, were discharged in an average of 21 hours, and returned to full activity, usually within days. The only complication presented in this group of patients was an umbilical port seroma. Virtually all patients (97 percent) behaved as if only a colonoscopy had been performed. Pain at the trocar sites was managed with acetaminophen 600 mg by mouth as needed. CONCLUSION: Laparoscopic-monitored colonoscopic polypectomy allows patients to undergo removal of colonic polyps without a segmental resection. This less invasive procedure yields recovery times similar to that of colonoscopy alone: and the potential complications of a segmental resection are avoided. All polyps are examined by frozen section, and if a malignancy is encountered, a laparoscopic resection can be performed MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 16 U4 - Gastroenterology & Hepatology;Surgery U5 - J;Article AV - English IS - 0012-3706 UR - ISI:000089370700011 L2 - polypectomy;colonoscopy;laparoscopy;management of difficult polyps SO - Diseases of the Colon & Rectum 2000 ;43(9):1246-1249 689 UI - 16214 AU - Fraquelli HA AU - Storchi-Bergmann T AU - Binette L AD - UFRGS, Inst Fis, BR-91050197 Porto Alegre, RS, BrazilNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoFraquelli, HA, UFRGS, Inst Fis, BR-91050197 Porto Alegre, RS, Brazil TI - The extended narrow-line region of the Seyfert 1 galaxy ESO 362-G18 versus that of the Seyfert 2 galaxy ESO 362-G8 AB - We use long-slit spectroscopic data to study in detail the extended narrow-line regions (ENLRs) of the Seyfert 1 galaxy ESO 362-G18 and Seyfert 2 galaxy ESO 362-G8. These two galaxies have similar emission-line luminosities and extents of the ENLR (similar to 4 kpc), whose shapes in previous narrowband [O III] images suggest anisotropic escape of the nuclear ionizing radiation as expected for shadowing by a nuclear torus in the framework of the unified model. In the Seyfert 1 galaxy the high-excitation gas shows an approximately cone-shaped morphology. From the observed kinematics, we conclude that the gas within the cone most probably belongs to the galaxy disk, which implies that the collimation axis is closer to the disk than half the opening angle of the cone of ionizing radiation. In the Seyfert 2 galaxy, the main structure in the high-excitation gas is an emission blob which apparently consists of a high-latitude cloud being blown away from the nuclear region and ionized by the nuclear source. We use the radial distribution of stellar population features in order to extrapolate this population to the nucleus and isolate the optical continuum of the nuclear source. We obtain a featureless power-law continuum F-v proportional to v(-0.76) for the Seyfert 1 galaxy, while for the Seyfert 2 galaxy we conclude that the nuclear bluer color and smaller equivalent widths of the absorption lines are due to an aging burst of star formation (age approximate to 300 Myr) and that the nuclear source is hidden from direct view. Using the photoionization code MAPPINGS Ic and a mixture of matter-bounded (MB) and ionization-bounded (IB) clouds, we model the ENLRs of the two galaxies. We use all the observables, mostly the emission-line fluxes as a function of distance from the nucleus and the optical nuclear continuum observed in the Seyfert 1 galaxy as well as its X-ray flux, to constrain the parameters of a self-consistent model for the ENLR. For both galaxies, we conclude that a power-law ionizing continuum F-v proportional to v(-1.2) better reproduces the high-excitation lines near the nucleus than a multisegmented power law used in previous works. For the Seyfert 1 galaxy ESO 362-G18, the inferred luminosity of the ionizing continuum can be reconciled with the flux observed in the optical, while in the X-rays the observed flux is similar to 100 times weaker than that necessary to reproduce the line fluxes, suggesting that the X-ray continuum is absorbed toward Earth. For the Seyfert 2 galaxy ESO 362-G8, the inferred ionizing continuum when extrapolated to the optical implies a minimum obscuration toward the nuclear source of A(V) approximate to 4.0 mag. In the hypothesis of an isotropic nuclear source, in order to better constrain the model parameters, we have adopted symmetrical physical conditions as a function of distance on both sides of the nucleus: namely, the ionizing flux, the temperature, density, and ionization parameter of the MB gas, and the metallicity. The radial density behavior of the IB gas was observationally inferred from the CS nl doublet ratio. The only free parameter, which was allowed to vary independently, was the relative proportion of the MB and IB emission-line components along the ENLR. The high-excitation gas within the cone of ESO 362-G18 and within the blob of ESO 362-G8 have been modeled as regions of larger mass contribution from the MB component relative to other locations of the ENLR. We derive the filling factors, covering factors, and gas masses along the ENLR as a function of distance from the nucleus. A comparison between the model results for the two galaxies shows that, around the nucleus, the Seyfert 1 galaxy has a larger excitation due to a larger contribution of the MB component. However, in the cone, the excitation is lower than in the blob of the Seyfert 2 galaxy due to a combination of a lower ionizing flux and larger gas density in the disk of the Seyfert 1 galaxy. The total ionized gas mass derived for the blob in the Seyfert 2 galaxy is 10(5.8) M-circle dot, consistent with its proposed origin in a nuclear superwind which probably occurred similar to 300 Myr ago, while the ionized gas mass in the disk of the Seyfert 1 galaxy is 1 order of magnitude smaller MH - Brazil MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086468500009 L2 - galaxies : active;galaxies : ISM;galaxies : nuclei;galaxies : Seyfert;STELLAR POPULATION SYNTHESIS; ACTIVE GALACTIC NUCLEI; EMISSION; GAS; EXCITATION; CONTINUUM; STARBURST; NGC-4151 SO - Astrophysical Journal 2000 ;532(2):867-882 690 UI - 14580 AU - Freeman GH AU - Gongora-Aldaz JA AD - Univ Warwick, Stat Consultancy Unit, Warwick, EnglandUniv Autonoma Yucatan, Fac Math, Merida, Mexico TI - The superposition of t treatments on a (t-1) x t Youden square design AB - Representative members of the species of (t - 1) x t Youden squares for t = 4, 5, 6 are given. The superposition of a further set of t non-interacting treatments on such a design leads to an O: OT: OTT design. The numbers of O: OT: OTT designs for each species of Youden squares are given, together with examples of the various types of solution where they exist. For 3 x 4 Youden squares there are O: OT: OTT solutions for both species, but for 4 x 5 Youden squares there is a solution for only one of the three species. For 5 x 6 Youden squares the numbers of O: OT: OTT solutions for the 33 species ranges from 0 to 160 MH - United Kingdom MH - Mexico|Yucatan PB - WINNIPEG: UTIL MATH PUBL INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Statistics & Probability U5 - J;Article AV - English IS - 0315-3681 UR - ISI:000166163600002 SO - Utilitas Mathematica 2000 ;58():11-32 691 UI - 14897 AU - Frez J AU - Gonzalez JJ AU - Acosta JG AU - Nava FA AU - Mendez I AU - Carlos J AU - Garcia-Arthur RE AU - Alvarez M AD - Seismol Dept, Ensenada 22860, Baja California, MexicoNew Mexico Tech, IRIS PASSCAL Instrument Ctr, Socorro, NM 87801, USAFrez, J, Seismol Dept, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - A detailed microseismicity study and current stress regime in the peninsular ranges of northern Baja California, Mexico: The Ojos Negros Region AB - The NW-trending San Miguel fault system is one of the most important seismogenic systems in northern Baja California, and the Ojos Negros region, comprising the Ojos Negros valley and bordering areas, is one of its most active regions. Within this region are found most of the mapped faults of the system: Ojos Negros, Tres Hermanos, most of San Miguel, and portions of the Vallecitos fault, which makes this a very important region from the points of view of intraplate tectonics and regional seismic hazard. A detailed microseismicity (0.2 less than or equal to M less than or equal to 4.0) survey of the Ojos Negros region, carried out in 1997 (one month, 13 Reftek stations recording at 200 samples/sec, plus two permanent RESNOM stations and other less sensitive instruments), yielded important results about the fault activity and the stress regime in the region. Our results are based on 278 hypocenters and 50 focal mechanisms selected from almost 2500 earthquakes recorded at a minimum of four stations. The selected database is comprised of good quality local events, for which the hypocentral depth can be reliably estimated. Locations and focal mechanisms were obtained using an improved velocity model (Sierra97) for this part of the Peninsular Ranges. The hypocenters tend to cluster in space and time, with cluster interepicenter separations of the order of the location error (il km). The Ojos Negros valley las defined by its sedimentary soil) is roughly covered by epicenters. The Tres Hermanos fault shows no significant seismicity, and the few earthquakes near (although not very close to) its southern third seem to be associated with seismicity that extends into the valley. Seismicity associated with the Ojos Negros fault consists almost exclusively of one large cluster. The San Miguel fault, the most active fault in the area, has epicenters within a 6-8 km wide band centered along its mapped trace. Most focal mechanisms are strike-slip with a minor normal component, while others are dominantly normal. The resulting pattern for the valley indicates a regional extensional regime with the average T axis in the ENE-WSW direction, and P axes distributed along an N-S strip with a slight inclination and concentrated near the poles MH - Mexico|Baja California MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000165250600002 L2 - SOUTHERN-CALIFORNIA; EARTHQUAKES; FAULT; ZONE SO - Bulletin of the Seismological Society of America 2000 ;90(5):1133-1142 692 UI - 14232 AU - Fridman E AU - Fridman L AU - Shustin E AD - Tel Aviv Univ, Dept Elect Engn, IL-69978 Tel Aviv, IsraelChihuahua Inst Technol, Chihuahua 31160, MexicoTel Aviv Univ, Sch Math Sci, IL-69978 Tel Aviv, IsraelFridman, E, Tel Aviv Univ, Dept Elect Engn, IL-69978 Tel Aviv, Israel TI - Steady modes in relay control systems with time delay and periodic disturbances AB - We study stability of slow oscillatory motions in first order one- and two-dimensional systems with delayed relay control element and periodic disturbances, which serve as models of stabilization of the fingers of an underwater manipulator and of control of fuel injectors in automobile engines. Various types of stability observed are used to design a direct adaptive control of relay type with time delay that extinguishes parasite auto-oscillations in these models. [S0022-0434(00)04004-1] MH - Israel MH - Mexico|Chihuahua PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 11 U4 - Automation & Control Systems;Instruments & Instrumentation U5 - J;Article AV - English IS - 0022-0434 UR - ISI:000167109200023 L2 - time delay systems;steady modes;adaptive control;SLOWLY OSCILLATING SOLUTIONS; EQUATIONS SO - Journal of Dynamic Systems Measurement and Control-Transactions of the Asme 2000 ;122(4):732-737 693 UI - 15645 AU - Friedel JK AU - Langer T AU - Siebe C AU - Stahr K AD - Univ Agr Sci, Inst Organ Farming, A-1180 Vienna, AustriaUniv Hohenheim, Inst Soil Sci & Land Evaluat, D-70593 Stuttgart, GermanyUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoFriedel, JK, Univ Agr Sci, Inst Organ Farming, Gregor Mendel Str 33, A-1180 Vienna, Austria TI - Effects of long-term waste water irrigation on soil organic matter, soil microbial biomass and its activities in central Mexico AB - The effect of long-term waste water irrigation (up to 80 years) on soil organic matter, soil microbial biomass and its activities was studied in two agricultural soils (Vertisols and Leptosols) irrigated for 25, 65 and 80 years respectively at Irrigation District 03 in the Valley of Mezquital near Mexico City. In the Vertisols, where larger amounts of water have been applied than in the Leptosols, total organic C (TOC) contents increased 2.5-fold after 80 years of irrigation. In the Leptosols, however, the degradability of the organic matter tended to increase with irrigation time. It appears that soil organic matter accumulation was not due to pollutants nor did microbial biomass:TOC ratios and qCO(2) values indicate a pollutant effect. Increases in soil microbial biomass C and activities were presumably due to the larger application of organic matter. However, changes in soil microbial communities occurred, as denitrification capacities increased greatly and adenylate energy charge (AEC) ratios were reduced after long-term irrigation. These changes were supposed to be due to the addition of surfactants, especially alkylbenzene sulfonates (effect on denitrification capacity) and the addition of sodium and salts (effect on AEC) through waste water irrigation. Heavy metals contained in the sewage do not appear to be affecting soil processes yet, due to their low availability. Detrimental effects on soil microbial communities can be expected, however, from further increases in pollutant concentrations due to prolonged application of untreated waste water or an increase in mobility due to higher mineralization rates MH - Austria MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Soil Science U5 - J;Article AV - English IS - 0178-2762 UR - ISI:000088324100008 L2 - waste water irrigation;heavy metals;soil organic matter;microbial biomass;microbial activity;ADENYLATE ENERGY-CHARGE; SEWAGE-SLUDGE; HEAVY-METALS; SANDY LOAM; ACCUMULATION; IMPACT; COPPER SO - Biology and Fertility of Soils 2000 ;31(5):414-421 694 UI - 14990 AU - Frugere S AU - Leon AC AU - Prevot F AU - Palacios RC AU - Tabouret G AU - Bergeaud JP AU - Duranton C AU - Dorchies P AU - Jacquiet P AD - Ecole Natl Vet Toulouse, INRA, ENVT, UMR, F-31076 Toulouse 03, FranceUniv Autonoma Baja Calif Sur, La Paz, Baja Calif Sur, MexicoJacquiet, P, Ecole Natl Vet Toulouse, INRA, ENVT, UMR, 23 Chemin Capelles, F-31076 Toulouse 03, France TI - Immunisation of lambs with excretory secretory products of Oestrus ovis third instar larvae and subsequent experimental challenge AB - Excretory-secretory products (ESP) of myiasis producing agents are involved in nutrition and development of larvae and are often immunogens. This study was carried out in order to define the antigenicity, the immunogenicity of Oestrus ovis ESP and the role of sheep immune response to ESP. Twenty-four six to eight month old female lambs were randomly allocated into two groups. The first one was immunised twice, four weeks apart, with excretory-secretory products of Oestrus ovis third instar larvae (L3ESP) in complete then incomplete Freund adjuvant. The second one served as a control, and received two injections of PBS plus complete and incomplete Freund adjuvant. Fifteen and twenty-eight days after the second immunisation, animals of both groups were experimentally challenged with O. ovis first instar larvae. Twelve days after the second experimental challenge, the twenty-four lambs were necropsied. The total number of O. ovis larvae, their stages of development, weights and sizes were recorded per animal and compared between the two groups. Establishment rates were very similar in both groups: 39% and 35% in control and vaccinated groups respectively but the percentage of developing stages was higher in the control group (13%) than in the vaccinated group (6%). It was concluded that the L3ESP immunisation of sheep did not protect against larval establishment but provided an inhibitory effect on larval growth MH - France MH - Mexico|Baja California Sur PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0928-4249 UR - ISI:000090060000008 L2 - Oestrus ovis;excretory-secretory products;sheep;immunisation;experimental challenge;BLOWFLY LUCILIA-CUPRINA; ESTRUS-OVIS; HYPODERMA-LINEATUM; FUTURE-PROSPECTS; INFESTED SHEEP; VACCINATION; INFECTION; EFFICACY; STRIKE; INFESTATION SO - Veterinary Research 2000 ;31(5):527-535 695 UI - 15030 AU - Frye CA AU - Manjarrez J AU - Camacho-Arroyo I AD - SUNY Albany, Dept Psychol Biol Sci, Albany, NY 12222, USASUNY Albany, Neurobiol Res Ctr, Albany, NY 12222, USAInst Nacl Neurol & Neurocirugia MVS, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Dept Biol, Mexico City 04510, DF, MexicoFrye, CA, SUNY Albany, Dept Psychol Biol Sci, 1400 Washington Ave, Albany, NY 12222 USA TI - Infusion of 3 alpha,5 alpha-THP to the pontine reticular formation attenuates PTZ-induced seizures AB - Whether progesterone (P-4) and its metabolite, 5 alpha -pregnan-3 alpha -ol-20-one (3 alpha ,5 alpha -THP) have anti-seizure effects through actions in the pontine reticular formation (PRF) was investigated. Concentrations of P-4 and 3 alpha ,5 alpha -THP in the PRF were greater in proestrous and hormone-primed rats, that are typically more resistant to seizure-induction, than diestrous and males rats. Ovx, Long-Evans rats with unilateral microinjections into the PRF of 3 alpha ,5 alpha -THP (5 mug/0.2 mul), but not P-4 (11 mug/0.2 mul) or vehicle (beta -cyclodextrin), had a greater latency and lower incidence of tonic-clonic seizures induced by pentylenetetrazol (PTZ; 70 mg/kg, IF) administration. Infusions that missed the PRF were not effective. These data suggest 3 alpha ,5 alpha -THP has anti-seizure effects in part through actions in the PRF. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000090036500013 L2 - progesterone;allopreganollone;tetrahydroprogesterone;non-genomic;neurosteroid;pentylenetetrazol;NEUROSTEROID 3-ALPHA,5-ALPHA-THP; PROGESTERONE; RECEPTOR; COMPLEX; METABOLITES; MODULATORS; EPILEPSY; HORMONE; WOMEN; RATS SO - Brain Research 2000 ;881(1):98-102 696 UI - 15370 AU - Fuentes-Masip O AU - Munoz-Tunon C AU - Castaneda HO AU - Tenorio-Tagle G AD - Inst Astrofis Canarias, E-38200 Tenerife, SpainUniv Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoInst Nacl Astrofis Opt & Electron, Puebla, MexicoFuentes-Masip, O, Inst Astrofis Canarias, Via Lactea, E-38200 Tenerife, Spain TI - On the size and luminosity versus velocity dispersion correlations from the giant HII regions in the irregular galaxy NGC 4449 AB - Here we present the size and luminosity versus velocity dispersion empirical correlations for the giant H II regions in the large irregular galaxy NGC 4449. We show that correlations only hold for nebulae with a surface brightness higher than 2 x 10(35) ergs s(-1) pc(-2) in H alpha and with a supersonic single-line Gaussian profile. The exponents of the fits are consistent with virial mechanisms. A comparison with the results from other studies that have only used first-ranked giant H II regions from a variety of star-forming galaxies is also given MH - Mexico|Baja California MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000089040800019 L2 - galaxies : individual (NGC 4449);HII regions;turbulence;H-II REGIONS; SUPERSONIC TURBULENCE; DISTANCE INDICATORS; NEARBY GALAXIES; HUBBLE CONSTANT; 3D DATA; KINEMATICS; GAS; MOTIONS; NGC-4449 SO - Astronomical Journal 2000 ;120(2):752-762 697 UI - 15943 AU - Fuentes-Masip O AU - Castaneda HO AU - Munoz-Tunon C AD - Inst Astrofis Canarias, E-38200 La Laguna, Tenerife, SpainUniv Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoInst Astrofis Canarias, E-38200 La Laguna, Tenerife, SpainFuentes-Masip, O, Inst Astrofis Canarias, Calle Via Lactea, E-38200 La Laguna, Tenerife, Spain TI - Star-forming regions in the irregular galaxy NGC 4449: Determination of their integrated parameters AB - We present a study of the H II regions in the central area of the giant irregular galaxy NGC 4449 based on observations taken on the William Herschel Telescope at the Rogue de los Muchachos observatory with the Taurus II Fabry-Perot interferometer in the emission lines of H alpha and [O III] 5006.8. We show that the usual methods of determining sizes of H II regions are not valid in this galaxy because of the high surface density of nebulae and the presence of an intense diffuse luminosity over NGC 4449, so it has been necessary to develop a new method. The procedure we have used allows integrated parameters of H rr regions (radius, luminosity, radial velocity, and velocity dispersion) to be obtained with greater objectivity and precision than with other methods. The technique proposed here can be extended to parameterize giant H II regions in galaxies in general and to resolve the problem of the large uncertainties associated with previous methods in characterizing star-forming regions in Magellanic irregular galaxies MH - Mexico|Baja California MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000087311300013 L2 - galaxies : irregular;HII regions;Magellanic Clouds;techniques : spectroscopic;H-II REGIONS; IONIZED-GAS; NEARBY GALAXIES; HUBBLE CONSTANT; NGC-4449; GIANT; KINEMATICS; POPULATIONS; DIAMETERS; NGC-4214 SO - Astronomical Journal 2000 ;119(5):2166-2182 698 UI - 16697 AU - Fuentes OUV AD - CICESE, Dept Oceanografia Fis, Ensenada, Baja California, MexicoFuentes, OUV, CICESE, POB 434844, San Diego, CA 92143, USA TI - Evolution of a Lamb quadrupolar vortex AB - The Lamb vortices are stationary solutions of the Euler equations in two dimensions. The well-known dipolar vortex is the simplest of these structures; the quadrupolar vortex, formed by four counter rotating vortices within a circular region and a linear strain flow in the exterior, is second in increasing order of complexity. Here the evolution of a perturbed Lamb quadrupolar vortex is studied numerically. It is found that the vortex survives as a quadrupolar structure when the perturbed structure preserves the reflection symmetry with respect to each strain axis. In contrast, the vortex either survives or is destroyed when the perturbed state preserves only one reflection symmetry, depending on which axis remains as a symmetry line. Finally, the vortex is always destroyed when the perturbed state loses the two reflection symmetries of the original quadrupole. (C) 2000 The Japan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0169-5983 UR - ISI:000083904900002 L2 - two-dimensional vortices;Euler equations;quadrupole;dipole;monopole;stability;LABORATORY EXPERIMENTS; DIPOLAR VORTICES; BETA-PLANE; MOTION; FLUID; COUPLES; MODONS; FLOWS SO - Fluid Dynamics Research 2000 ;26(1):13-33 699 UI - 16639 AU - Fuentes S AU - Bogdanchikova N AU - valos-Borja M AU - Boronin A AU - Farias MH AU - Diaz G AU - Cortes AG AU - Barrera A AD - UNAM, Ctr Ciencias Mat Condensada, San Ysidro, CA 92143, USACICESE, Ensenada, Baja California, MexicoNovosibirsk Catalysis Inst, Novosibirsk 630090, RussiaUNAM, Inst Fis, Mexico City, DF, MexicoBogdanchikova, N, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Structural and catalytic properties of Pd/Al2O3-La2O3 catalysts AB - A new Pd/Al2O3-La2O3 catalyst has been synthesized for the reduction of NO with hydrogen. This catalyst is more active than coprecipitated Pd/Al2O3 catalysts. The revealed effect of the improvement of the catalytic activity at medium temperature and the increase of NH3 formation at high temperatures for Pd catalyst supported on alumina-lanthana prepared by the sol-gel method are ascribed to a new lanthanum-containing phase observed by X-ray powder diffraction and high resolution electron microscopy. (C)2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000084875700011 L2 - Pd/Al2O3-La2O3 catalysts;sol-gel preparation method;nitrogen oxide reduction;NH3 production;PALLADIUM CATALYSTS; NITRIC-OXIDE; REDUCTION; HYDROGEN; H-2; DESORPTION; LANTHANUM; CO SO - Catalysis Today 2000 ;55(3):301-309 700 UI - 16277 AU - Fuerstenau DW AU - Herrera-Urbina R AU - McGlashan DW AD - Univ Calif Berkeley, Dept Mat Sci & Mineral Engn, Berkeley, CA 94720, USAUniv Sonora, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, MexicoUniv Montana, Dept Met & Mineral Proc, Butte, MT 59701, USAFuerstenau, DW, Univ Calif Berkeley, Dept Mat Sci & Mineral Engn, Hearst Min Bldg,477 Evans Hall 1760, Berkeley, CA 94720 USA TI - Studies on the applicability of chelating agents as universal collectors for copper minerals AB - The efficacy of copper chelating agents as collectors for both copper oxide and sulfide minerals has been assessed through contact angle measurements. Because of the insoluble nature of many of these organic reagents, the use of a suitable solvent was necessary for preparing aqueous solutions. Finite contact angle results are presented as average values for the pH range where only finite contact was observed. The chelating reagents tested were classified according to the type of atoms that bond the metal cation and participate in the closure of the chelate ring. Five different types of bidentate chelating reagents were identified: N-O, O-O, S-N, S-S, and N-N. The most refractory copper mineral was found to be chrysocolla, which exhibited contact angles only with 1-phenylthiosemicarbazide and with potassium octyl hydroxamate. This last reagent proved to have excellent collecting properties for copper oxide minerals and native copper, primarily because of its alkyl chain length. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0301-7516 UR - ISI:000086218400003 L2 - chelate reagents;copper mineral flotation;chelating flotation collectors;contact angles SO - International Journal of Mineral Processing 2000 ;58(1-4):15-33 701 UI - 15727 AU - Fuerte-Esquivel CR AU - Acha E AU - mbriz-Perez H AD - Inst Tecnol Morelia, Dept Ingn Elect & Elect, Morelia, Michoacan, MexicoUniv Glasgow, Dept Elect & Elect Engn, Glasgow G12 8QQ, Lanark, ScotlandFuerte-Esquivel, CR, Inst Tecnol Morelia, Dept Ingn Elect & Elect, Morelia, Michoacan, Mexico TI - A thyristor controlled series compensator model for the power flow solution of practical power networks AB - A new and comprehensive load flow model for the Thyristor Controlled Series Compensator (TCSC) is presented in this paper. In this model the state variable is the TCSC's firing angle, which is combined with the nodal voltage magnitudes and angles of the entire network in a single frame-of-reference for a unified iterative solution through a Newton-Raphson method, Unlike TCSC models available in the open literature, this model takes account of the loop current that exists in the TCSC under both partial and full conduction operating modes. Also, the model takes proper care of the resonant points exhibited by the TCSC fundamental frequency impedance. The Newton-Raphson algorithm exhibits quadratic or near-quadratic convergence characteristics, regardless of the size of the network and the number of TCSC devices MH - Mexico|Michoacan MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000087916000009 L2 - FACTS;Newton-Raphson;power flow control;TCSC SO - Ieee Transactions on Power Systems 2000 ;15(1):58-64 702 UI - 16561 AU - Fule PZ AU - Garcia-Arevalo A AU - Covington WW AD - No Arizona Univ, Sch Forestry, Ecol Restorat Program, Flagstaff, AZ 86011, USAInst Ecol, Durango 34000, MexicoFule, PZ, No Arizona Univ, Sch Forestry, Ecol Restorat Program, Box 15018, Flagstaff, AZ 86011 USA TI - Effects of an intense wildfire in a Mexican oak-pine forest AB - An oak-pine forest burned by intense wildfire in April, 1996, and a companion unburned area were sampled 1 month and 1 yr postfire in La Michilia Biosphere Reserve, Durango, Mexico. Up to 90% of the trees were killed or top-killed in the burned area, but larger trees tended to survive, so basal area was only reduced by 66%. Top-killing was relatively higher among fire-susceptible oaks and lower among fire-resistant pines. However, oaks were strong resprouters both in the canopy and at the base of topkilled trees. Damage codes based on crown scorch and bole char were high ly accurate when predicting that a tree would die but substantially overestimated survivors. Most tree regeneration was topkilled in the fire, but oak sprout density was 700% that of the unburned area by 1 yr postfire. Manzanita shrubs also resprouted vigorously. Herbaceous production and cover were fewer after the first postfire growing season in the burned area than the unburned area. Woody fuels and forest floor depth were also reduced. Although short-term fire effects indicate that the forest ecosystem has moved closer toward a savanna condition, remnant seed trees and sprouting trees are expected to maintain forest cover. Future herbaceous production is likely to increase in response to overstory mortality. Quantification of fire effects is helpful for supporting short-term management decisions since oak-pine forests cover millions of hectares in northern Mexico. As a long-term management strategy, however, we suggest that restoring the frequent, low-intensity fire regime may be desirable for ecological and economic reasons MH - USA MH - Mexico|Durango PB - BETHESDA: SOC AMER FORESTERS RP - NOT IN FILE U3 - TC 10 U4 - Forestry U5 - J;Article AV - English IS - 0015-749X UR - ISI:000085158500007 L2 - Juniper;madrone;mortality;herbaceous production;fuel;ecological restoration;Sierra Madre Occidental;PONDEROSA PINE; FIRE; WEATHER SO - Forest Science 2000 ;46(1):52-61 703 UI - 14905 AU - Fuller MLS AU - Fernandez LR AU - Massoumi GR AU - Lennard WN AU - Kasrai M AU - Bancroft GM AD - Univ Western Ontario, Dept Chem, London, ON N6A 5B7, CanadaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Western Ontario, Dept Phys, London, ON N6A 5B7, CanadaFuller, MLS, Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada TI - The use of X-ray absorption spectroscopy for monitoring the thickness of antiwear films from ZDDP AB - X-ray absorption near edge structure (XANES) spectroscopy at the P K-edge was used to monitor ZDDP antiwear film thickness with rubbing time. Thermal immersion films of varying thickness were generated from the ZDDP and analysed using XANES spectroscopy and the particle induced X-ray emission (PIXE) technique. P K-edge XANES edge jumps and (1s --> np) peak heights of the spectra were plotted against PIXE mass thickness values in order to establish calibration curves. Antiwear films were analysed using XANES spectroscopy, and average mass thicknesses were extrapolated from the calibration curves. A set of antiwear films formed in the presence of ZDDP and then further rubbed in base oil (no ZDDP) showed no significant decrease in film thickness. A set of antiwear films rubbed in the presence of ZDDP for various lengths of time showed an increase in film thickness, followed by thinning of the film. The decrease in film thickness is believed to be due to wear caused by the ZDDP solution decomposition products acting as an abrasive in the contact region MH - Canada MH - Mexico|Distrito Federal PB - BUSSUM: BALTZER SCI PUBL BV RP - NOT IN FILE U3 - TC 34 U4 - Engineering, Chemical;Engineering, Mechanical U5 - J;Article AV - English IS - 1023-8883 UR - ISI:000165165400001 L2 - ZDDP;antiwear;film thickness;XANES spectroscopy;PIXE analysis;LUBRICATED CAM/TAPPET CONTACT; NEAR-EDGE STRUCTURE; CHEMICAL CHARACTERIZATION; FLUORESCENCE MEASUREMENTS; WEAR; SULFUR; DITHIOPHOSPHATE; SURFACES; ELECTRON; STEEL SO - Tribology Letters 2000 ;8(4):187-192 704 UI - 14997 AU - Fundora A AU - Siqueiros JM AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv La Habana, IMRE, Fac Fis, La Habana 10400, CubaSiqueiros, JM, Ctr Invest Cient & Educ Super Ensenada, B Cfa,Apdo Postal 2732, Ensenada 22800, Baja California, Mexico TI - Deposition and characterization of PMNT thin films AB - The system Pb[(Mg1/3Nb2/3)(0.90)Ti-0.03]O-3 (PMNT) is classified as a relaxer ferroelectric material, paraelectric at room temperature. Ceramics of this compound were used as targets to produce thin films by pulsed laser deposition (PLD). A KrF excimer laser with lambda = 248 nm, a fluence of 2 J/cm(2) and 10 Hz repetition rate was used for the deposits on TiN/SiO2/Si(100) substrates. Well adhered and uniform thickness films were obtained showing no evidence of as-deposited crystallinity, X-Ray Diffraction studies showed the development of microcrystalline structure with annealing starting at 500 degreesC, evidenced also by scanning electron microscopy (SEM). Finally, a correlation between the measured dielectric properties of the films and their microstructure is made. (C) 2000 Elsevier Science S.A. All rights reserved MH - Cuba MH - Mexico|Baja California PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900015 L2 - ferroelectrics;hysteresis loops;structural properties SO - Thin Solid Films 2000 ;373(1-2):60-63 705 UI - 15448 AU - Gaggero-Sager LM AU - Pujals ER AU - Sotolongo-Costa O AD - Univ Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, MexicoInst Matemat Pura & Aplicada, BR-10400 Rio De Janeiro, BrazilUniv La Habana, Fac Fis, La Habana 10400, CubaGaggero-Sager, LM, Univ Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, Mexico TI - Self-similarity in a Cantor-like semiconductor quantum well AB - We present the first calculus of the electronic structure, the wave function and the charge density of a single isolated Canter quantum well in GaAs/AlGaAs system. This quantum well is made following the Canter algorithm of the third order. We observed that the charge density shows the linear selfsimilarity. 100 levels of energy in this system have been calculated showing self-similarity. Though self-similarity has been observed in superlayers, this is the first time that it is observed in an isolated quantum well MH - Brazil MH - Cuba MH - Mexico|Zacatecas PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800028 SO - Physica Status Solidi B-Basic Research 2000 ;220(1):167-169 706 UI - 16243 AU - Galicia-Guerrero S AU - Bursey CR AU - Goldberg SR AU - Salgado-Maldonado G AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoPenn State Univ, Dept Biol, Sharon, PA 16146, USAWhittier Coll, Dept Biol, Whittier, CA 90608, USASalgado-Maldonado, G, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Helminths of two sympatric toad species, Bufo marinus (Linnaeus) and Bufo marmoreus Wiegmann, 1833 (Anura : Bufonidae) from Chamela, Jalisco, Mexico AB - Helminths of sympatric Bufo marinus (Linnaeus) (N = 49) and Bufo marmoreus Wiegmann (N = 19) from the Pacific coast of jalisco, Mexico, are reported. Bufo marinus harbored Ochoterenella digiticauda Caballero y Caballero, Rhabdias fuelleborni Travassos, Physaloptera sp. (larvae), an unidentified species of nematode, and cystacanths of Centrorhynchus sp. Bufo marinus is a new host and Jalisco a new locality record for R. fuelleborni and Physocephalus sp. Bufo marmoreus harbored Aplectana incerta Caballero y Caballero, R. fuelleborni, Physocephalus sp. (larvae), and cystacanths of Centrorhynchus sp. Bufo marmoreus is a new host record for each of these helminths MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 11 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1049-233X UR - ISI:000086297400018 L2 - Bufo marinus;Bufo marmoreus;nematodes;Aplectana incerta;Ochoterenella digiticauda;Rhabdias fuelleborni;Physaloptera sp.;Physocephalus sp.;Centrorhynchus sp.;cystacanth;Jalisco;Mexico;SOUTHERN ARIZONA; GIANT TOAD; PELOBATIDAE; POPULATION; NEMATODA; COGNATUS; AMPHIBIA; DIGENEA; BERMUDA SO - Comparative Parasitology 2000 ;67(1):129-133 707 UI - 16367 AU - Galicia-Luna LA AU - Ortega-Rodriguez A AU - Richon D AD - Inst Politecn Nacl, Lab Termodinam Grad, ESIQIE, Mexico City 07738, DF, MexicoEcole Natl Super Mines, CEREP, Lab Thermodynam, F-77305 Fontainebleau, FranceGalicia-Luna, LA, Inst Politecn Nacl, Lab Termodinam Grad, ESIQIE, Edif Z,Secc 6,1Er Piso,UPALM, Mexico City 07738, DF, Mexico TI - New apparatus for the fast determination of high-pressure vapor-liquid equilibria of mixtures and of accurate critical pressures AB - An apparatus based on the static-analytic method has been designed to perform fast determinations of vapor-liquid equilibria and critical pressures for mixtures up to 60 MPa and 523 K. Vapor pressures of isobutane and vapor-liquid equilibria of the following mixtures-carbon dioxide + ethanol at (312.82, 313.15, 333.82, 333.75, 348.4, and 373.00) K up to 14.3 MPa and carbon dioxide + 2-propanol at (324.99, 324.70, 333.70, 333.82, and 348.65) K up to 10.5 MPa-are reported herein over the whole range of compositions. The experimental data are represented/predicted using the Patel-Teja equation of state (EOS) with new Wong-Sandler type mixing rules. For the carbon dioxide + ethanol and carbon dioxide + 2-propanol mixtures, the parameters of the EOS were fitted to the VLE data at 313.15 K and at 324.70 K, respectively. VLE data at higher temperatures were then predicted and found to be in good agreement with the data reported in this work. Critical pressures and compositions were also determined for the system carbon dioxide + ethanol at 312.82, 333.75, 333.82, 348.40, and 373.00 K; all of them are in agreement with those published in the literature MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 38 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000085903000026 L2 - CARBON-DIOXIDE ETHANOL; PHASE-EQUILIBRIA; STATE; EQUATION; METHANOL; SYSTEMS SO - Journal of Chemical and Engineering Data 2000 ;45(2):265-271 708 UI - 16037 AU - Galicia O AU - Sanchez-Alavez M AU - az-Ruiz O AU - Narvaez FS AU - Elder JH AU - Navarro L AU - Prospero-Garcia O AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Psicol, Dept Proc Basicos, Mexico City 04510, DF, MexicoScripps Res Inst, Dept Mol Biol, La Jolla, CA 92037, USAProspero-Garcia, O, Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Mexico City 04510, DF, Mexico TI - HIV-derived protein gp120 suppresses P3 potential in rats: potential implications in HIV-associated dementia AB - Between 20 and 30% of AIDS patients have neurological symptoms characterized by motor impairment, memory loss and progressive dementia. Previous studies have implicated the HIV derived gp120, which produces behavioral deficits and electrophysiological alterations in rats. The goal of the present study was to describe the effect of this protein on the P3 event-related potential (ERP), evoked by a passive discrimination task in rats. We used Ii rats divided into two groups: HIV gp 120 (n = 6) and control (n = 5). We recorded the P3 wave before any treatment (baseline), during the i.c.v. administration of either HIVgp120 (700 ng/5 days) or saline (pH 7.2), and 24 h, 7, 14 and 21 days after the last injection. There were no changes between groups in the amplitude or latencies of the observed components (N1, P2, N2 and P3) evoked by target stimuli, during baseline or during the injection period. However, the HIV gp120 group showed a significant amplitude reduction in P3 wave 24 h after the last injection, while the N1, P2 and N2 waves remained unchanged. However, from the 7th day through the 21st day, P2 and N2 components also disappeared and only the NI component could be observed in the HIV gp120-treated group. These changes in the N2, P2 and P3 potentials, suggesting an alteration in cognitive processes, further support the neurotoxic activity of HIV gp120 and its role in AIDS dementia. NeuroReport 11:1351-1355 (C) 2000 Lippincott Williams & Wilkins MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000086931600041 L2 - AIDS dementia complex;cognition;event related potentials;HIV gp120;N100;P300;ENVELOPE PROTEIN; INFECTION; ABNORMALITIES; HABITUATION; DISEASE SO - Neuroreport 2000 ;11(6):1351-1355 709 UI - 16343 AU - Galina MA AU - Guerrero M AU - Serrano G AU - Morales R AU - Haenlein GFW AD - UNAM, Fac Estudios Super Cuautitlan, Cuautitlan 54000, MexicoUniv Colima, Posgrado Interinst Ciencias Pecuarias, Colima 28000, MexicoMunicipio Marques, Queretaro, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAGalina, MA, UNAM, Fac Estudios Super Cuautitlan, Cuautitlan 54000, Mexico TI - Effect of complex catalytic supplementation with non-protein nitrogen on the ruminal ecosystem of growing goats pasturing on shrub land in Mexico AB - Thirty-eight young Alpine goats, 16.1 (+/-0.370) kg body weight (BW), were reared at Queretaro, Mexico, grazing on a semi-arid woody brush (Caducifolio espinoso) range land. The experimental goats (n = 20) were pastured daily and supplemented with 200 g/day of a complex catalytic feed (CCF). It consisted of molasses (14-18%), urea (8-10%), salt (3-4%), limestone (3-4%), cottonseed meal (13-18%), rice polishing (10-13%), corn (11-12%). poultry litter (9-10%), commercial mineral salt (1.3%), ammonium sulfate (0.3-0.5%), cement kiln dust (1.5%), and animal lard (10-15%). The control goats (n = 18) were supplemented daily with 300 g of a balanced concentrate (BC), containing 1.5% commercial mineral salt, 60% corn, 32.5% wheat bran, and 4% soybean oil meal. Stocking rates varied from 1.45 to 1.85 AU/ha and daily stocking rate from 36.4 to 58.6 AU/ha. At all times, fibrous forages were available exceeding the voluntary dry matter intake. One fistulated goat was kept in each group. Growth of the experimental goats averaged 95 g/day (+/-3) compared to 76 g/day (+/-5) of the controls (P < 0.005) in 150 days from June to November. Supplementation per kg BW was from 17.5 to 10.4 g BC/ day for the control goats; the experimental goats received 12.2-6.5 g CCF/day, Weight gain in response to fermentable carbohydrates (FC) averaged 8.95 g BW gain/g FC/day for the control BC goats, compared to 28.2 g BW gain/g FC/day for the experimental CCF goats. Daily supplies of FC to goats on CCF supplementation were always below the limits for celullolysis at 6 g/day, while FC supplies of BC rations to the control goats always exceeded them. After 2 h of shrub land pasture, the ruminal pH rose when CCF was offered and stayed above 6.6 during 12 h, while the ruminal acidity in BC goats went down to pH 5.57 at 6 h and rose to 6.5 by 12 h, Ammonia (NH3 mg/l) in ruminal liquid of CCF goats was higher (P < 0.01) in average and all but one sample. Total cost per animal per day including shrub land pasture, management, medicine and salaries was US $0.06 for experimental goats and US $0.09 for controls (market price for goat meal was US $1.15/kg; US $1.00 = 10 Mexican Pesos, November 1998), Daily gain varied during the study period from 77 to 85 g/day in BC control goats compared to 92-97 g/day in experimental CCF goats. CCF supplementation to shrub land pasturing resulted in significantly greater weight gains apparently due to elevated ruminal pH, higher availability of fermentable carbohydrates and ruminal ammonia, augmenting ruminal ecosystem, digestibility and voluntary feed intake. The use of local shrub land resources and complex catalytic supplementation with non-protein nitrogen provided greater profitability from this feeding system for growing goals than the traditional balanced concentrate feed supplementation. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000085957900005 L2 - nutrition;goats;growth;ruminal ecosystem;supplementation;shrub land;urea;TREATED BARLEY STRAW; DIGEST CELLULOSE; FIBER DIGESTION; CATTLE; DIETS; UREA; SHEEP; DIGESTIBILITY; LIVEWEIGHT; RUMEN SO - Small Ruminant Research 2000 ;36(1):33-42 710 UI - 16469 AU - Galindo-Bect MS AU - Glenn EP AU - Page HM AU - Fitzsimmons K AU - Galindo-Bect LA AU - Hernandez-Ayon JM AU - Petty RL AU - Garcia-Hernandez J AU - Moore D AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoEnvironm Res Lab, Tucson, AZ 85706, USAUniv Calif Santa Barbara, Inst Marine Sci, Santa Barbara, CA 93106, USAGlenn, EP, Univ Autonoma Baja California, Inst Invest Oceanol, Km 103 Carretera Tijuana Ensenada, Ensenada, Baja California, Mexico TI - Penaeid shrimp landings in the upper Gulf of California in relation to Colorado River freshwater discharge MH - Mexico|Baja California MH - USA PB - SEATTLE: NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE RP - NOT IN FILE U3 - TC 22 U4 - Fisheries U5 - J;Article AV - English IS - 0090-0656 UR - ISI:000085512900017 L2 - ABUNDANCE; DELTA SO - Fishery Bulletin 2000 ;98(1):222-225 711 UI - 16675 AU - Galindo-Reyes JG AU - la Venezia L AU - Lazcano-Alvarez G AU - Rivas-Mendoza H AD - Univ Autonoma Sinaloa, Fac Ciencias Mar, Mazatlan, Sinola, MexicoCNR, Ist Biol Mare, Venice, ItalyGalindo-Reyes, JG, Univ Autonoma Sinaloa, Fac Ciencias Mar, Paseo Claussen S-N,POB 610, Mazatlan, Sinola, Mexico TI - Enzymatic and osmoregulative alterations in white shrimp Litopenaeus vannamei exposed to pesticides AB - Pesticide pollution in coastal ecosystems of Sinaloa, Mexico is considered to be a cause for slow growth, increase of diseases and sometimes massive mortality of shrimp. So it was necessary to develop fast techniques to detect pesticide pollution in shrimp habitats. Enzymatic and osmoregulation tests in shrimp exposed to DDT, Lindane, Chlordane, Lorsban, Gusathion, Folidol, Diazinon and Tamaron were carried out. Activity reductions from 11 to 2 units/ml in acetylcholinesterase and from 1 to 0 units/l in transaminases (GOT and GPT) were detected. Also increases in osmoregulation were observed in shrimp exposed to Folidol, Diazinon and Gusation, whereas decreases with DDT, Lindane and Lorsban at salinity 50 parts per thousand. We conclude that pesticides are causing alterations in these biochemical functions and this kind of tests represent a rapid and inexpensive method for pesticide pollution detection. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Italy MH - Mexico|Sinaloa PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0045-6535 UR - ISI:000084527100001 L2 - pesticides;toxicity;shrimp;Mexican coast;MEXICO SO - Chemosphere 2000 ;40(3):233-237 712 UI - 14870 AU - Galindo-Uribarri A AU - del Campo JG AU - Beene JR AU - Gross CJ AU - Liang JF AU - Paul SD AU - Shapira D AU - Stracener DW AU - Varner RL AU - Chavez E AU - Huerta A AU - Ortiz ME AU - Padilla E AU - Pascual S AD - Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAOak Ridge Inst Sci & Educ, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGalindo-Uribarri, A, Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA TI - Study of resonant reactions with radioactive ion beams AB - A fast and efficient method to study (p,p) and (p,alpha) resonances with radioactive beams in inverse kinematics is described. It is based on the use of thick targets and large area double-sided silicon strip detectors (DSSDs) to detect the recoiling light-charged particles and to determine precisely their scattering angle. The first nuclear physics experiments with the technique have been performed recently at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge with stable beams of O-17 and radioactive beams of F-17. Th, high-quality resonance measurements obtained demonstrate the capabilities of the technique. Pure F-17 beams from HRIBF were produced by fully stripping the ions and separating the interfering and more abundant O-17 ions by the beam transport system. The removal of interfering isobars is one of the various common challenges to both accelerator mass spectrometry (AMS) and radioactive ion beam (RIB) production. Experiments done with RIBs wilt benefit from the use of the most efficient techniques for production, isobar separation, transport and detection. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000165231000110 L2 - radioactive ion beams;resonance scattering;silicon microstrip detectors;SCATTERING; TARGETS SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2000 ;172():647-654 713 UI - 15846 AU - Galindo E AU - Pacek AW AU - Nienow AW AD - Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, EnglandUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Bioingn, Cuernavaca 62191, Morelos, MexicoNienow, AW, Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England TI - Study of drop and bubble sizes in a simulated mycelial fermentation broth of up to four phases AB - The mean sizes and size distributions of air bubbles and viscous castor oil drops were studied in a salt-rich aqueous solution (medium), first separately, and then simultaneously as a three-phase system. The dispersion was created in a 150-mm-diameter stirred tank equipped with a Rushton turbine, and the sizes were measured using an advanced video technique. Trichoderma harzianum biomass was added in some experiments to study the effect of a solid phase under unaerated and aerated conditions to give either three-or four-phase systems. In all cases, the different dispersed phases could be clearly seen. Such photoimages have never been obtained previously. For the three phases, air-oil-medium, aeration caused a drastic increase in Sauter mean drop diameter, which was greater than could be accounted for by the reduction in energy dissipation on aeration. Also, as in the unaerated case, larger drops were observed as the oil content increased. On the other hand, mean bubble sizes were significantly reduced with increasing oil phase up to 15% with bubbles inside many of the viscous drops. With the introduction of fungal biomass of increasing concentration (0.5 to 5 g L-1) under unaerated conditions, the Sauter mean drop diameter decreased. Finally, in the four-phase system (oil [10%]-medium-air-biomass) as found in many fermentations, all the phases (plus bubbles in drops) could clearly be seen and, as the biomass increased, a decrease in both the bubble and the drop mean diameters was found. The reduction in size of bubbles (and therefore increase in interfacial area) as the oil and biomass concentration increased provides a possible explanation as to why the addition of an oil phase has been reported to enhance oxygen transfer during many fermentations. (C) 2000 John Wiley & Sons, Inc MH - United Kingdom MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000087688700010 L2 - agitation;aeration;four-phase system;bubble sizes;drop sizes;mycelia;IN-WATER DISPERSIONS; OXYGEN-TRANSFER; TRICHODERMA-HARZIANUM; STIRRED VESSEL; OIL; VIDEO SO - Biotechnology and Bioengineering 2000 ;69(2):213-221 714 UI - 15383 AU - Galindo F AU - Broom DM AD - Univ Cambridge, Dept Clin Vet Med, Cambridge CB3 0ES, EnglandGalindo, F, UNAM, Fac Med Vet & Zootecn, Dept Etol & Fauna Silvestre, Mexico City 04510, DF, Mexico TI - The relationships between social behaviour of dairy cows and the occurrence of lameness in three herds AB - It is well known that lameness in cattle has a multifactorial causation, however it is still not clear why some individuals are more susceptible to foot lesions in the same environment. Behaviour is thought to play an important role. The aim of this study was to assess the relationships between social and individual behaviour and the incidence of lameness in three dairy herds. Low-ranting cows spent less time lying and more time standing still and standing half in the cubicles than middle- and high-ranking cows. As time spent standing half in the cubicle increased, the number of soft tissue lesions increased and as total rime standing increased the number of cases of lameness increased. The survival rate to lameness for low-ranking cows was significantly lower than for middle- or high-ranking individuals. (C) Harcourt Publishers Ltd MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 26 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0034-5288 UR - ISI:000088856800012 L2 - TIE STALL ENVIRONMENTS; LOOSE HOUSING PASTURE; LAMINITIS; CATTLE; KEPT SO - Research in Veterinary Science 2000 ;69(1):75-79 715 UI - 16177 AU - Galindo F AU - Broom DM AU - Jackson PGG AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Etol & Fauna Silvestre, Coyoacan 04510, DF, MexicoUniv Cambridge, Dept Clin Vet Med, Cambridge CB3 0ES, EnglandGalindo, F, Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Etol & Fauna Silvestre, Coyoacan 04510, DF, Mexico TI - A note on possible link between behaviour and the occurrence of lameness in dairy cows AB - Lameness in cattle is a major welfare problem and has important economic implications. It is known that lameness has a multifactorial causation; however, it is still not clear why some individuals are more susceptible than others to present foot lesions under the same environment. Social and individual behaviour is thought to play an important role. The aim of this study was to assess the possible relationships between social behaviour, individual time budgets, and the incidence of lameness in 40 dairy cows. The incidence of lameness in the group of cows observed was 42%, There were no differences in the mean time standing between low-, middle- and high-ranking cows. Low-ranking cows spent more time standing still in passageways and standing half in the cubicles than middle- and high-ranking cows. No differences were found in the mean time standing between cows that got lame and cows that did not get lame. However, cows that got clinically lame spent longer standing half in the cubicles and had a significantly lower index of displacements than those cows that did not get: lame. This study may offer a starting point to better understand the relationships between behaviour and the occurrence of lameness in dairy cows. (C) 2000 Elsevier Science B,V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Agriculture, Dairy & Animal Science;Behavioral Sciences;Veterinary Sciences U5 - J;Article AV - English IS - 0168-1591 UR - ISI:000086528100006 L2 - cattle social behaviour;time budgets;lameness;SOCIAL-BEHAVIOR; CATTLE SO - Applied Animal Behaviour Science 2000 ;67(4):335-341 716 UI - 14673 AU - Galvan DH AU - Kim H AU - Maple MB AU - Hirata GA AU - Adem E AD - Univ Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093, USAUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoGalvan, DH, Univ Calif San Diego, Dept Phys, La Jolla, CA 92093, USA TI - Flux pinning effect of embedded carbon nanotubes in Bi2Sr2CaCu2O8 AB - The enhancement in the critical current density J(c) is one of tile most important challenges in superconductivity. Since the discovery of high temperature superconductors like YBa2Cu3O7-x, ((1)) and subsequently with the advent of BiSrCaCuO, ((2)) TlBaCuO, ((3)) and HgBaCuO ((4)) families, a great deal of research has been devoted to improve their transport properties and specially to enhance J(c). In this work, we address a new technique developed in order to increase J(c) in a sample of BSCCO (2212) embedded in carbon nanotubes MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855700234 SO - Physica C 2000 ;341():1269-1270 717 UI - 15903 AU - Galvan DH AU - Kim JH AU - Maple MB AU - valos-Borja M AU - Adem E AD - Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoGalvan, DH, Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA TI - Formation of NbSe2 nanotubes by electron irradiation AB - In this work, we report the production of NbSe2, (niobium diselenide) nanotubes by high doses of electron irradiation. The apparatus used for irradiation was a 2 MeV Van de Graaff accelerator, while the irradiation conditions were the following: voltage 1.3 MeV, current 5 mu A dose rate 25 kGy/min, and total dosage 1000 kGy. Samples were analyzed with a high-resolution transmission electron microscope. The main characteristics observed were huge and very well defined nanotubes of several nm long and few nm wide, which are presumably hollow, although they are capped at one end. At this level of irradiation, we were able to find neither onion-like structure nor nanoparticles through out other areas, as it is usual in similar hexagonal structures of the dichalcogenide family MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 25 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1064-122X UR - ISI:000087508300002 L2 - CARBON NANOTUBES; ONIONS SO - Fullerene Science and Technology 2000 ;8(3):143-151 718 UI - 16595 AU - Galvan DH AU - Alonso G AU - Rangel R AU - del Valle M AU - Adem E AU - Fuentes S AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, San Ysidro, CA 92143, USACtr Invest Mat Avanzados, Chihuahua, MexicoUniv Michoacana, SNH, Escuela Ingn Quim, Morelia, Michoacan, MexicoUniv Autonoma Baja California, Fac Ciencias Quim, Tijuana 21100, Baja California, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoGalvan, DH, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Catalytic study of WS2 undergoing electron irradiation AB - Tungsten disulfide is irradiated with electrons at 1000 kGy and used as a catalyst in the hydrodesulfurization of dibenzothiophene, Catalytic conversion, selectivity, surface area, and other physical properties are then compared to those of crystalline WS2 and exfoliated WS2 for the same reaction. The dibenzothiophene conversion of irradiated samples is found to be 3.8 times greater than that of crystalline WS2, while the surface area decreases by 30%, Irradiation of WS2 lowers the selectivity for dicyclohexane, increasing the selectivities for biphenyl and phenylcyclohexane, Consequently, the hydrogenation/hydrodesulfurization ratio decreases by 42%. Microstructural characteristics of irradiated WS2 are analyzed by scanning electron microscopy and X-ray diffraction techniques. Scanning electron micrographs show evidence of crystal damage due to irradiation. The X-ray diffraction patterns of irradiated WS2 have weaker peak intensities compared to crystalline WS2, especially in the case of the (002) reflection. Peak width analysis indicates that the average crystal size of WS2 is smaller after irradiation. The enhanced catalytic activity of irradiated WS2 is discussed in terms of structural changes brought about by electron irradiation. (C) 2000 Academic Press MH - USA MH - Mexico|Baja California MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000084997500002 L2 - electron irradiation;catalytic activity;WS2 catalysts;HDS activity;DBT conversion;TRANSITION-METAL SULFIDES; HYDRODESULFURIZATION ACTIVITY; MOLYBDENUM SULFIDE; TUNGSTEN DISULFIDE; MOS2; DECOMPOSITION; EXFOLIATION; MODEL SO - Journal of Catalysis 2000 ;189(2):263-268 719 UI - 14178 AU - Gamaly EG AU - Rode AV AU - Luther-Davies B AD - Australian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoRode, AV, Australian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, Australia TI - Formation of diamond-like carbon films and carbon foam by ultrafast laser ablation AB - The ultra-fast ablation of a graphite target using high repetition rate Nd:YAG lasers allows us to deposit two distinctly different carbonaceous structures, depending on the ambient Ar pressure: a diamond-like carbon film with the surface finish down to atomic level at a pressure below 0.1 Torr, and a fractal C nanofoam with air-like density and diamond-like resistivity at higher pressure. The experimental characterization of vapors and carbonaceous materials produced is presented and compared to the theoretical predictions. The analysis of the formation conditions leads to the qualitative understanding of the formation mechanism for both C structures MH - Australia MH - Mexico|Distrito Federal PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0263-0346 UR - ISI:000167290100014 L2 - PULSE-RATE LASERS; AVALANCHE IONIZATION; THEORETICAL CONSIDERATIONS; PART II; DEPOSITION; BREAKDOWN; SILICON SO - Laser and Particle Beams 2000 ;18(2):245-254 720 UI - 16381 AU - Gamaly EG AU - Rode AV AU - Maser WK AU - Munoz E AU - Benito AM AU - Martinez MT AU - de la Fuente GF AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoAustralian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, AustraliaCSIC, Inst Carboquim, Zaragoza 50015, SpainUniv Zaragoza, CSIC, ICMA, Zaragoza 50015, SpainGamaly, EG, Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Appl Math, Canberra, ACT 0200, Australia TI - Single-walled carbon nanotubes formation with a continuous CO2-laser: experiments and theory AB - It has been proved [1] that the use of a CO2-laser system operating in continuous wave mode (cw) can be efficiently used for the production of carbon single-walled nanotubes (SWNTs). In this article we first describe in detail the variable experimental conditions (different ambient gases, static gas pressure, and gas flow) for SWNT formation and summarize the results of the characterization studies of the synthesized materials. Second, we analyze the influence of the different experimental conditions on the SWNTs formation process. We show that the heat transport, kinetic, and diffusion processes allow us to explain seemingly different formation conditions in a qualitative and semi-quantitative agreement with the experimental results. The presented self-consistent scenario for nanotube formation in a gas phase allowed us to propose future experiments on testing the mechanism of nanotube formation MH - Australia MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000085952800006 L2 - LASER-ABLATION; TARGETS SO - Applied Physics A-Materials Science & Processing 2000 ;70(2):161-168 721 UI - 14797 AU - Gamboa IA AU - Salinas CF AU - Mendivil R AU - Aparicio JM AU - Carvajal TA AD - Benemerita Univ Autonoma Puebla, Escuela Med, Puebla, MexicoMed Univ S Carolina, Div Craniofacial Genet, Charleston, SC 29425, USASecretaria Salud Edo Puebla, Puebla, MexicoHosp Nino Poblano, Puebla, MexicoLab Zacatecas, Mexico City, DF, Mexico TI - Cerebrotendinous xanthomatosis (CTX). The first mexican family reported MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400700679 SO - American Journal of Human Genetics 2000 ;67(4):132-132 722 UI - 16688 AU - Gamboa SA AU - Sebastian PJ AU - Chavez-Carvayar JA AU - Hermann A AD - CIE UNAM, Dept Solar Mat, Temixco 62580, Morelos, MexicoIIM UNAM, Mexico City, DF, MexicoUniv Colorado, Dept Phys, Boulder, CO 80309, USAGamboa, SA, CIE UNAM, Dept Solar Mat, Privada Xochicalco S-N, Temixco 62580, Morelos, Mexico TI - Electrochemical approaches used to evaluate the kinetic parameters of a multicomponent MH-electrode AB - In this paper we present a general panorama of views about the general considerations manifested in mathematical treatments, their basis, factors and general conclusions, permitting good electrochemical approaches between theoretical analysis correlated with experimental data. (C) 1999 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000084301900007 L2 - METAL HYDRIDE ELECTRODES; MATHEMATICAL-MODEL; HYDROGEN; BATTERIES; DISCHARGE; SYSTEM; ALLOY SO - International Journal of Hydrogen Energy 2000 ;25(3):239-241 723 UI - 15114 AU - Gandouzi M AU - Bourgoin JC AU - Mimila-Arroyo J AU - Grattepain C AU - Grattepain C AD - Univ Paris 06, CNRS, UMR 7603, Lab Milieux Desordonnes & Heterogenes, F-75252 Paris 05, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dpto Ing Elect, Mexico City 07300, DF, MexicoThomson CSF, Cent Rech Lab, F-91404 Orsay, FranceCNRS, Phys Solides Lab, F-92195 Meudon, FranceUniv Sfax Sud, Fac Sci Gabes, Dept Phys, Gabes 6029, TunisiaBourgoin, JC, Univ Paris 06, CNRS, UMR 7603, Lab Milieux Desordonnes & Heterogenes, Tour 22,Casier 86,4 Pl Jussieu, F-75252 Paris 05, France TI - Impurity incorporation during epitaxial growth of GaAs by chemical reaction AB - Vapour-phase epitaxy of GaAs in conditions where the growth is limited by the chemical reactions of the gases with the substrate and not by gas transport is correctly understood in case the gases are produced by the decomposition of a GaAs source by H2O. Using secondary ion mass spectroscopy we have measured the efficiency at which various impurities (C, O, Si, S, Zn, Mg, Cr and Fe) are transported from the source into the grown layer. It is found that impurity transport is driven by the formation of volatile oxides, allowing to foresee which impurity can or cannot be incorporated into the grown layer. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Tunisia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000089575200005 L2 - GaAs;epitaxy;impurity;chemical reaction;SPACED VAPOR TRANSPORT; LAYERS SO - Journal of Crystal Growth 2000 ;218(2-4):167-172 724 UI - 15638 AU - Ganem-Quintanar A AU - Quintanar-Guerrero D AU - Buri P AD - Univ Nacl Autonoma Mexico, FES Cuautitlan, Cuautitlan Izcalli, MexicoCtr Interuniv Rech & Enseignement, F-74166 Archamps, FranceUniv Geneva, Pharm Sect, CH-1211 Geneva 4, SwitzerlandGanem-Quintanar, A, Rio Panuco 38,Colinas Lago, Cuautitlan Izcalli 54744, EM, Mexico TI - Monoolein: A review of the pharmaceutical applications MH - France MH - Mexico|Estado De Mexico MH - Switzerland PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 0363-9045 UR - ISI:000088301500001 L2 - absorption enhancer;drug delivery system;emulsifier;glyceryl monooleate;monoglyceride polymorphism;monoolein;pharmaceutical carrier;DRUG-DELIVERY SYSTEMS; POORLY ABSORBED DRUGS; X-RAY-DIFFRACTION; FREQUENCY DIELECTRIC-SPECTROSCOPY; MONOGLYCERIDE-WATER SYSTEMS; LIQUID-CRYSTALLINE PHASE; SALT MIXED MICELLES; CUBIC PHASES; INTESTINAL-ABSORPTION; EMULSION FORMULATIONS SO - Drug Development and Industrial Pharmacy 2000 ;26(8):809-820 725 UI - 16019 AU - Garateix A AU - Vega R AU - Salceda E AU - Cebada J AU - Aneiros A AU - Soto E AD - Univ Autonoma Puebla, BUAP, Inst Fisiol, Puebla 72000, Pue, MexicoMinist Ciencia Tecnol & Med Ambiente, Inst Oceanol, Dept Bioact & Prod Nat Marinos, La Habana, CubaSoto, E, Univ Autonoma Puebla, BUAP, Inst Fisiol, Apartado Postal 406, Puebla 72000, Pue, Mexico TI - BgK anemone toxin inhibits outward K+ currents in snail neurons AB - We studied the effects of BgK toxin on outward K+ currents in isolated neurons of the snail Helix aspersa, using the whole cell patch clamp technique. BgK partially and reversibly blocked K+ currents in the 1 pM to 100 nM concentration range (n=53). The dose-response curve for BgK current inhibition had a maximum blocking effect at 100 nM. Our results indicate that BgK is a potent, apparently non-selective, K+ channel blocker in molluscan neurons. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000087003000017 L2 - marine toxins;neurotoxin;potassium channel;Helix aspersa;Bunodosoma granulifera;BgK;POTASSIUM-CHANNEL TOXIN; AMINO-ACID-SEQUENCE; BUNODOSOMA-GRANULIFERA; BIOLOGICAL-ACTIVITY; CLAMP SO - Brain Research 2000 ;864(2):312-314 726 UI - 14605 AU - Garay AH AU - Matthew C AU - Hodgson J AD - Massey Univ, Dept Plant Sci, Palmerston North, New ZealandGaray, AH, Colegio Postgrad, Progama Ganaderia, Montecillo 56230, Texcoco Edo Mex, Mexico TI - The influence of defoliation height on dry-matter partitioning and CO2 exchange of perennial ryegrass miniature swards AB - This study investigated the effects of defoliation intensity on the above- and below-ground plant mass, rates of CO2 exchange and leaf appearance rate of ryegrass miniature swards maintained at constant cutting height ranging from 20 mm to 160 mm for 5 months. Total plant mass, above-ground herbage mass and root mass increased as cutting height increased from 20 to 120 mm. Further increase in cutting height did not increase total plant mass or its components. Leaf appearance rate and photosynthesis per unit of leaf dry matter (DM) decreased as defoliation height increased from 20 to 160 mm. Gross and net CO2 uptake per unit soil surface area increased with cutting height to 120 mm. Further increase in cutting height to 160 mm decreased gross and net CO2 uptake and herbage harvested. A multivariate canonical discriminant analysis indicated different responses of root and shoot mass to cutting height and a reduction in CO2 uptake rate at the 160 mm cutting height. The implications of those responses to defoliation management of forage plants are discussed MH - Mexico|Estado De Mexico MH - New Zealand PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0142-5242 UR - ISI:000166168100011 L2 - CONTINUOUSLY-GRAZED SWARDS; GRASS PRODUCTION; GROWTH; PHOTOSYNTHESIS; PHYSIOLOGY SO - Grass and Forage Science 2000 ;55(4):372-376 727 UI - 14661 AU - Garay G AU - Mardones D AU - Rodriguez LF AD - Univ Chile, Dept Astron, Santiago, ChileUNAM, Inst Astron, Mexico City 04510, DF, MexicoGaray, G, Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile TI - Silicon monoxide and methanol emission from the NGC 2071 molecular outflow AB - We report observations of emission in the J = 3 --> 2 and J = 2 --> 1 transitions of SiO and J(k) = 3(k) --> 2(k) transitions of made with the Swedish-ESO Submillimeter Telescope (SEST), toward the high-velocity, collimated molecular outflow in NGC 2071. Emission is detected from the lobes, as well as from the central core region, in both species. The spatial distribution of the SiO wing emission, which is detected over a velocity range of similar to 50 km s(-1), shows three distinct features : a blueshifted clump located toward the northeast, a redshifted clump located toward the southwest, and a central structure, with moderate redshifted velocities, located near the cluster of young stellar objects. The shape of the SiO profiles from the northeast and southwest clumps are distinctly different. The SiO lines from the northeast clump exhibit a peak near the velocity of the ambient cloud and a gradual decline toward blueshifted velocities reaching flow velocities of up to -32 km s(-1). On the other hand, the SiO profiles from the southwest clump show a peak emission at a velocity that is redshifted by similar to8.5 km s(-1) from the ambient gas velocity and a gradual decline in brightness toward the ambient cloud velocity. We suggest that the SiO emission from the clumps are signposts of working surfaces where a collimated jet is interacting with ambient material, and ascribe the differences in line shape to differences in the density of the environment under which the jet is propagating. The abundance of silicon monoxide in the outflow lobes is found to be enhanced, with respect to that of quiescent ambient gas in dark globules, by at least 2 orders of magnitude (peak enhancement greater than or equal to 500 in the southwest clump and greater than or equal to 170 in the northeast clump). The abundance of methanol is considerably more enhanced in the southwest clump (peak enhancement of similar to 500) than in the northwest clump (peak enhancement of similar to 70). We suggest that the large enhancements of methanol and silicon monoxide in the outflow clumps are most likely due to the release from grains of ice mantles and Si-bearing species via shocks produced by the interaction between the outflow and dense ambient gas, and attribute the differences in enhancements to the different shock velocities attained in the northeast clump (v(s) similar to 45 km s(-1)) and southwest clump (v(s) similar to 12 km s(-1)) MH - Chile MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166023400027 L2 - ISM : abundances;ISM : individual (NGC 2071);ISM : jets and outflows;ISM : molecules;FAR-INFRARED OBSERVATIONS; BIPOLAR OUTFLOW; YOUNG STARS; HIGH-RESOLUTION; SHOCKED GAS; HYDROGEN EMISSION; SIO EMISSION; NGC-2071; CLOUDS; CHEMISTRY SO - Astrophysical Journal 2000 ;545(2):861-873 728 UI - 15607 AU - Garcia-Alvarado F AU - Amador U AU - Alvarez M AU - De la Cruz AM AD - Univ San Pablo CEU, Fac CC Expt & Tecn, Dept Quim Inorgan & Mat, E-28668 Madrid, SpainUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Div Estudios Super, Monterrey, NL, MexicoGarcia-Alvarado, F, Univ San Pablo CEU, Fac CC Expt & Tecn, Dept Quim Inorgan & Mat, Crta Boadilla Monte Km 5,300, E-28668 Madrid, Spain TI - Structural and electrochemical characterisation of electrode materials for lithium rechargeable batteries AB - The so called Electrochemical Potential Spectroscopy has been used to characterise several intercalation systems. The technique has shown its usefulness to study the different phases that form when an intercalation reaction occurs. Once the existence domains are determined, the work dedicated to the preparation of samples, in order to perform the structural characterisation, is very much shortened. We also present some cases where the above referred electrochemical technique does not yield good results in as much as the existence domains are not well determined. These are the cases of reactions with a very slow kinetic of intercalation and those where displacement reaction occurs. Some problems with experimental set up can also prevent us of using this technique MH - Mexico|Nuevo Leon MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000088343000008 L2 - electrochemical intercalation;electrochemical characterisation;electrochemical potential spectroscopy;BRONZES SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2000 ;39(3):239-243 729 UI - 16163 AU - Garcia-Baez E AU - Rosales-Hoz MJ AU - Noth H AU - Haiduc I AU - Silvestru C AD - IPN, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Munich, Inst Inorgan Chem, D-80333 Munich, GermanyUniv Babes Bolyai, Fac Chim, RO-3400 Cluj Napoca, RomaniaRosales-Hoz, MJ, IPN, Ctr Invest & Estudios Avanzados, Dept Quim, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Rupture of a P=S bond in a disulfurimidophosphinate ligand. The X-ray crystal structures of [(mu(2)-H)Ru-3(mu(3)-S){mu(2)-S,S,P '-(SPPh2) (PPh2)N}(CO)(8)] and [(mu(2)-H)Ru-3{mu(2)-S,S,P '-(SPPh2) (PPh2)N}(CO)(9)] AB - The reaction of [Ru-3(CO)(12)] with (SPR2)(2)NH produced, initially, [(mu(2)-H)Ru-3(mu(3)-S) {mu 2-S,S,P'-SPPh2)(PPh2)N}(CO)(8) and [(mu(2)- H) Ru-3{mu(2)-S,S,P'-(SPPh2) (PPh2)N}(CO)(9)] in which for both compounds one of the P=S bonds of the ligand has been broken while the other P=S group is bonded through the sulfur atom to two ruthenium atoms. In one of the compounds described, the lost sulfur atom moves to a triply bridging position bonded to the triangle of metal atoms. In the second compound, the sulfur atom is lost. (C) 2000 Elsevier Science S.A. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Romania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1387-7003 UR - ISI:000086532700007 L2 - crystal structures;disulfurimidiophosphinate;ruthenium clusters;CHEMISTRY; COMPOUND; CLUSTERS; SE SO - Inorganic Chemistry Communications 2000 ;3(4):173-177 730 UI - 16248 AU - Garcia-Carrasco M AU - Pizcueta P AU - Cervera R AU - Ramos-Casals M AU - Siso A AU - de la Red G AU - Ingelmo M AU - Font J AU - Engel P AD - Univ Barcelona, Sch Med, Hosp Clin,Syst Autoimmune Dis Unit, Inst Inves Biomed August Pi & Sunyer,Dept Med, E-08036 Barcelona, Catalonia, SpainUniv Autonoma Puebla, Liver Unit, Hepat Haemodynam Lab, Puebla 72570, MexicoUniv Autonoma Puebla, Dept Cellular Biol & Pathol, Immunol Unit, Puebla 72570, MexicoUniv Autonoma Puebla, Dept Rheumatol Denernevita, Puebla 72570, MexicoFont, J, Univ Barcelona, Sch Med, Hosp Clin,Syst Autoimmune Dis Unit, Inst Inves Biomed August Pi & Sunyer,Dept Med, C Villarroel 170, E-08036 Barcelona, Catalonia, Spain TI - Circulating concentrations of soluble L-selectin (CD62L) in patients with primary Sjogren's syndrome AB - Objective-Serum concentrations of soluble (s) L-selectin (CD62L) were measured in patients with primary Sjogren's syndrome (SS) to relate these concentrations to clinical and immunological features of SS. Methods-The study included 30 consecutive patients (38 women and two men) with a mean age of 61 years (range 24-78) who fulfilled four or more of the preliminary diagnostic criteria for SS proposed by the European Community Study Group in 1993, and 33 healthy blood donors from the hospital blood bank. A sandwich enzyme linked immunosorbent assay (ELISA) was used to detect the soluble form of human sL-selectin (CD62L). Results-The mean (SEM) values of sL-selectin (CD62L) were 861 (66) mu g/ml for patients with SS and 986 (180) mu g/ml for healthy blood donors, but there was no significant difference. In patients with primary SS, serum sL-selectin (CD62L) concentrations were significantly higher in patients with Raynaud's phenomenon (1275 (112) mu g/ml versus 789 (69) mu g/ml, p=0.007), autoimmune thyroiditis (1162 (113) mu g/ml versus 787 (69) mu g/ml, p=0.02) and rheumatoid factor (993 (95) mu g/ml versus 684 (70) mu g/ml, p=0.01) when compared with patients without these features. Conclusion-The presence of Raynaud's phenomenon, autoimmune thyroiditis and rheumatoid factor is associated with higher concentrations of circulating sL-selectin (CD62L) in the sera of patients with primary SS MH - Mexico|Puebla MH - Spain PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 4 U4 - Rheumatology U5 - J;Article AV - English IS - 0003-4967 UR - ISI:000086341200011 L2 - ADHESION MOLECULES; EXPRESSION; LEUKOCYTES SO - Annals of the Rheumatic Diseases 2000 ;59(4):297-299 731 UI - 15233 AU - Garcia-Diaz CA AU - Steiner JJ AD - USDA ARS, Natl Forage Seed Prod Res Ctr, Corvallis, OR 97331, USAInst Nacl Invest Forestales & Agropecuarias, Mexico City 20660, DF, MexicoSteiner, JJ, USDA ARS, Natl Forage Seed Prod Res Ctr, 3450 SW Campus Way, Corvallis, OR 97331 USA TI - Birdsfoot trefoil seed production: II. Plant-water status on reproductive development and seed yield AB - Forage legume seed crop responses to water stress differ for each species, so a single optimal water management strategy is not applicable. The objectives of this study were to determine the effects of irrigation timing and replenishment amount on birdsfoot trefoil (Lotus corniculatus L.) reproduction and seed yield in the Willamette Valley of western Oregon, USA. Six treatments varying in water depletion percentage and replenishment amount were applied in 1994 and 1995 on a Woodburn silt loam soil (fine-silty, mixed, mesic Aquultic Argixeroll) near Corvallis. In 1996, only a low stress (LS) that met the weekly crop evapotranspirative demand and a non-irrigated control (C) treatment were investigated. In the first year of production, maintaining plants under low-stress conditions sustained flowering longer than with limited or no irrigation. Flowering was not affected by irrigation in the subsequent two production years. Total above-ground phytomass was correlated with the amount of irrigation water (r = 0.92). The C and all single application treatments had greater seed yields (SY) than the LS treatment in 1994. In 1995, all single application treatments had greater SY than the LS treatment. There was no difference between LS and C in 1995 and 1996. Umbel density and the number of seeds per pod were the primary determinants of total seed yield (r = 0.77 and 0.92, respectively). Optimal total seed production was achieved without supplemental irrigation under the humid temperate marine climatic conditions found in western Oregon MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000089410300023 L2 - REQUIREMENTS; IRRIGATION; COMPONENTS; ALFALFA SO - Crop Science 2000 ;40(2):449-456 732 UI - 15234 AU - Garcia-Diaz CA AU - Steiner JJ AD - USDA ARS, Natl Forage Seed Prod Res Ctr, Corvallis, OR 97331, USAInst Nacl Invest Forestales & Agropecuarias, Mexico City 20660, DF, MexicoSteiner, JJ, USDA ARS, Natl Forage Seed Prod Res Ctr, 3450 SW Campus Way, Corvallis, OR 97331 USA TI - Birdsfoot trefoil seed production: III. Seed shatter and optimal harvest time AB - Seed shattering is a major problem in birdsfoot trefoil (Lotus corniculatus L.) seed production and limited information is available describing the effects of agronomic practices on shatter losses. The objectives of this research were to: (i) quantify the effects of soil-water availability on seed shatter and (ii) determine optimal harvest time on the basis of a heat unit method to minimize birdsfoot trefoil seed losses under western Oregon climatic conditions. Six treatments varying In water depletion percentage and replenishment amount were applied in 1994 and 1995 and two treatments in 1996 on a Woodburn silt loam soil (fine-silty, mixed, mesic Aquultic Argixeroll) near Corvallis, OR. The total amount of shattered seeds was correlated with total harvested seed yield (r = 0.93), Crop water stress index (CWSI) was inversely related to the percentage of seeds shattered (r = - 0.76), Increasing amounts of applied water increased the potential of seed field shattered (r = 0.65). Seed shatter losses fluctuated during the late-reproductive period, but were not influenced by irrigation or fluctuating climatic conditions, A total of 109 heat units (approximately 11 d), which were determined on the basis of a 10 degrees C base temperature, were accumulated from the time of initial pod dehiscence until rapid seed shattering. The average seed yield losses due to shattering was 3 to 5.3 kg ha(=) d(=1). The non-irrigated control treatment generally produced more seeds than irrigated treatments. it is, thus, best not to irrigate birdsfoot trefoil grown for seed in western Oregon because increasing amounts of irrigation water increased seed shattering MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000089410300024 SO - Crop Science 2000 ;40(2):457-462 733 UI - 15127 AU - Garcia-Ferreira S AU - Sanchis M AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Jaume 1, Dept Math, Castello 12071, SpainYork Univ, Dept Math, N York, ON M3J 1P3, CanadaGarcia-Ferreira, S, Natl Autonomous Univ Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Some remarks on the product of two C-alpha-compact subsets AB - For a cardinal alpha, we say that a subset B of a space X is C-alpha-compact in X if for every continuous function f: X --> R-alpha, f[B] is a compact subset of R-alpha. If B is a C-compact subset of a space X, then rho(B,X) denotes the degree of Gor-compactness of B in X. A space X is called cu-pseudocompact if X is C-alpha-compact into itself. For each cardinal alpha, we give an example of an alpha-pseudocompact space X such that X x X is not pseudocompact: this answers a question posed by T. Retta in "Some cardinal generalizations of pseudocompactness" Czechoslovak Math. J. 43 (1993), 385-390. The boundedness of the product of two bounded subsets is studied in some particular cases. A version of the classical Glicksberg's Theorem on the pseudocompactness of the product of two spaces is given in the context of boundedness. This theorem is applied to several particular cases MH - Canada MH - Mexico|Distrito Federal MH - Spain PB - PRAGUE 1: CZECHOSLOVAK MATHEMATICAL JOURNAL RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0011-4642 UR - ISI:000089609800003 L2 - bounded subset;C alpha-compact;alpha-pseudocompact;degree of C alpha-pseudocompactness;alpha(r)-space;SPACES SO - Czechoslovak Mathematical Journal 2000 ;50(2):249-264 734 UI - 16605 AU - Garcia-Ferreira S AU - Malykhin VI AU - Tomita AH AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoState Acad Management, Moscow 109542, RussiaUniv Sao Paulo, Dept Math, BR-05315970 Sao Paulo, BrazilGarcia-Ferreira, S, Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Extraresolvable spaces AB - A space X is called extraresolvable if there is a family D of dense subsets such that \D\ > Delta(X), where Delta(X) is the dispersion character of X, and D boolean AND D' is nowhere dense whenever D, D' is an element of D and D not equal D'. It is shown that if X is either a countable spaces with nowhere dense tightness or a countable (Hausdorff) weakly Frechet-Urysohn space, then X is extraresolvable, It is not hard to see that every extraresolvable space is omega-resolvable. We prove that compact metric spaces and compact topological groups are not extraresolvable (these spaces are maximally resolvable). We also give some examples of metric extraresolvable topological Abelian groups with uncountable dispersion character, compact extraresolvable spaces with uncountable dispersion character and an example of a connected omega-bounded extraresolvable topological Abelian group. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000084789000004 L2 - extraresolvable;resolvable;weakly FU-space;nowhere dense tightness SO - Topology and Its Applications 2000 ;101(3):257-271 735 UI - 15834 AU - Garcia-Garcia MD AU - Valdespino-Gomez JL AU - Garcia-Sancho C AU - Mayar-Maya ME AU - Palacios-Martinez M AU - Balandrano-Campos S AU - Escobar-Gutierrez A AU - Peruga A AU - Weissenbacher M AU - Daniels E AD - Inst Nacl Salud Publ, Escuela Salud Publ Mexico, Secretaria Acad, Cuernavaca 62508, Morelos, MexicoINDRE, Mexico City, DF, MexicoPanAmer Hlth Org, Washington, DC, USADept Hlth & Human Serv, Off HIV AIDS Policy, Off Publ Hlth & Sci, Off Secretary Hlth, Washington, DC 20201, USAValdespino-Gomez, JL, Inst Nacl Salud Publ, Escuela Salud Publ Mexico, Secretaria Acad, Ave Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Underestimation of Mycobacterium tuberculosis infection in HIV-infected subjects using reactivity to tuberculin and anergy panel AB - Background This study aimed to evaluate purified protein derivative (PPD) reactivity and its interrelationship with anergy panel and CD4+ lymphocytes in HIV-infected subjects as compared to PPD reactivity in HIV-uninfected individuals in a tuberculosis endemic and high Bacillus Calmette-Guerin (BCG) coverage environment. Methods Clients of four Mexico City HN detection centres were screened for HIV-1 antibodies (ELISA or haemagglutination, Western Blot); reactivity to PPD (Mantoux PPD, 5TU RT-23), Candida (1:1000, 0.1 ml), and tetanus toroid (10Lf, 0.1 ml); and CD4+ T cells. Active tuberculosis was excluded. Informed consent was obtained. Results From 5130 clients 1168 subjects were enrolled; of these 801 (68.6%) were HN positive. Reactivity to PPD among HIV-positive subjects was found in 174 (22%), 261 (32.6%), and 296 (37%), at PPD cutoff levels of greater than or equal to 10 mm, greater than or equal to 5 mm, and greater than or equal to 2 mm as compared to 224 (61%) of 367 HIV-negative individuals' reactors to PPD (greater than or equal to 10 mm) (P < 0.001). After exclusion of anergic individuals using two cutoff levels for cutaneous allergens (less than or equal to 2 mm and less than or equal to 5 mm), PPD reactivity between HIV-infected and uninfected individuals continued to be significantly different. Only HIV-infected individuals with CD4+ T cells greater than or equal to 500 cells/mm(3) had similar reactivity to PPD as HIV-uninfected individuals. Variables associated with PPD reactivity were CD4+ T cell counts, BCG scar, HIV infection and age. Conclusions PPD reactivity was useful to diagnose tuberculosis infection only among HIV- infected individuals with CD4+ counts greater than or equal to 500 cells/mm(3). Among individuals with lower counts, lowering cutoff levels or using anergy panel did not permit comparable reactivity as that observed among HIV-uninfected individuals MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 13 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0300-5771 UR - ISI:000087589600025 L2 - tuberculin test;HIV;anergy;BCG vaccine;CD4 lymphocytes;delayed-type hypersensitivity;HUMAN-IMMUNODEFICIENCY-VIRUS; SKIN-TEST; AIDS; MEXICO; PREVALENCE; COUNTRIES SO - International Journal of Epidemiology 2000 ;29(2):369-375 736 UI - 16411 AU - Garcia-Garcia MD AU - Ponce-de-Leon A AU - Jimenez-Corona ME AU - Jimenez-Corona A AU - Palacios-Martinez M AU - Balandrano-Campos S AU - Ferreyra-Reyes L AU - Juarez-Sandino L AU - Sifuentes-Osornio J AU - Olivera-Diaz H AU - Valdespino-Gomez JL AU - Small PM AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoStanford Univ, Stanford, CA 94305, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoInst Nacl Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoGarcia-Garcia, MD, Inst Nacl Salud Publ, Ave Univ 655,Colegio Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Clinical consequences and transmissibility of drug-resistant tuberculosis in southern Mexico AB - Background: Consequences of drug-resistant tuberculosis (TB) in developing countries using directly observed treatment, short-course (DOTS), are not well defined. Objective: To determine the impact of drug resistance on clinical outcome and transmission of TB under programmatic conditions. Patients and Methods: A prospective cohort and molecular epidemiologic study was conducted in southern Mexico. Between March 1995 and February 1998 all patients with persistent cough whose sputa had acid-fast bacilli (AFB) underwent clinical and mycobaeteriologic evaluation (species identification, drug susceptibility testing,and IS6110-based genotyping). Treatment was provided in accordance with Mexico's National Tuberculosis Program. Clinical and microbiologic outcomes and molecular epidemiologically defined transmission were measured. Results: Mycobacterium tuberculosis was isolated from 238 of the 284 AFB smear-positive persons. The overall rate of resistance was 28.4% (new, 20.7%; retreated, 54.7%), and 10.8% (new, 3.3%; retreated, 35.8%) had multi-drug-resistant TB tie, resistance to isoniazid and rifampin). After treatment, 75% (new, 81.0%, retreated, 52.8%) were cured, 8% (new, 7.8%; retreated, 7.5%) abandoned therapy, 9% (new, 3.9%; retreated, 28.3%) had treatment failure, and 4% (new, 3.3%; retreated, 7.5%) died. Another 2% of patients relapsed, and 9% died during a median of 24.4 months of follow-up. Drug-resistance was a strong independent risk factor for treatment failure. Being infected with multi-drug-resistant TB was the only factor associated with a decreased Likelihood of being in a restriction fragment length polymorphism cluster. Conclusions: Despite the use of DOTS, patients with drug-resistant TB had a dramatically increased probability of treatment failure and death. Although multi-drug-resistant TB may have a decreased propensity to spread and cause disease, it has a profoundly? negative impact on TB control MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 55 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0003-9926 UR - ISI:000085808300006 L2 - DIRECTLY OBSERVED THERAPY SO - Archives of Internal Medicine 2000 ;160(5):630-636 737 UI - 16626 AU - Garcia-Garcia MD AU - Palacios-Martinez M AU - Ponce-de-Leon A AU - Jimenez-Corona ME AU - Jimenez-Corona A AU - Balandrano-Campos S AU - Olivera-Diaz H AU - Valdespino-Gomez JL AU - Small PM AD - Inst Nacl Salud Publ, Secretaria Acad, Subdirecc Gest Proyectos, Cuernavaca 62508, Morelos, MexicoInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoInst Nacl Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoStanford Univ, Stanford, CA 94305, USAGarcia-Garcia, MD, Inst Nacl Salud Publ, Secretaria Acad, Subdirecc Gest Proyectos, Ave Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - The role of core groups in transmitting Mycobacterium tuberculosis in a high prevalence community in Southern Mexico AB - SETTING: A community in Southern Mexico with a high prevalence of tuberculosis. OBJECTIVE: To characterize the transmission dynamics in a region with a DOTS-based tuberculosis control program. DESIGN: Community-based screening of chronic coughers between 1 March 1995 and 31 August 1996, Individuals with acid-fast bacilli (AFB) in their sputum were enrolled, interviewed, and had mycobacterial cultures and fingerprinting performed. In-depth interviews were conducted on all persons with DNA fingerprinting. RESULTS: AFB smears were performed on 1424 individuals, 124 of whom were microbiologically confirmed. Of the 95 cases for whom bacterial DNA fingerprints were available, 38 were in clusters. The largest cluster involved seven individuals who were members of a social network centered on a series of unlicensed bars. CONCLUSION: This population-based molecular epidemiologic study showed that a focus of transmission within a social network accounted for one fourth of transmission which rapidly progressed to disease. These observations raise questions about the potential benefit of targeted tuberculosis control interventions in health jurisdictions approaching WHO-defined DOTS benchmarks MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 25 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000084807300004 L2 - tuberculosis;molecular epidemiology;control;IS6110;Mexico;core groups;HUMAN-IMMUNODEFICIENCY-VIRUS; OUTBREAK; EPIDEMIOLOGY SO - International Journal of Tuberculosis and Lung Disease 2000 ;4(1):12-17 738 UI - 14731 AU - Garcia-Garcia ML AU - Jimenez-Corona ME AU - Ponce-de-Leon A AU - Jimenez-Corona A AU - Palacios-Martinez M AU - Balandrano-Campos S AU - Ferreyra-Reyes L AU - Juarez-Sandino L AU - Sifuentes-Osornio J AU - Olivera-Diaz H AU - Valdespino-Gomez JL AU - Small PM AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoStanford Univ, Inst Nacl Diagnost & Referencia Epidemiol, Stanford, CA 94305, USAGarcia-Garcia, ML, Inst Nacl Salud Publ, Ave Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Mycobacterium tuberculosis drug resistance in a suburban community in Southern Mexico AB - OBJECTIVE: To determine the impact of drug resistance (DR) on the clinical outcome and transmission of tuberculosis under programmatic conditions. METHODS: Prospective cohort and molecular epidemiologic study in the Orizaba Health Jurisdiction of Mexico. Between March 1995 and July 1999, chronic coughers with positive acid-fast bacilli (AFB) detected in sputum smear underwent clinical and mycobacteriologic evaluation (species identification, drug susceptibility testing and IS6110-based genotyping). Treatment was provided in accordance with official norms. RESULTS: Mycobacterium tuberculosis was isolated from 326/387 AFB-positive cases. The rate of DR was 24.2% and that of multidrug resistance (MDR, defined as resistance to both isoniazid and rifampin at least) was 7.7%; 78% were cured, 8% abandoned treatment, 6% failed treatment, and 5% died. An additional 13.5% received retreatment and 8.9% died during a median 28.6 months of follow up. Factors associated with DR by multivariate analysis were chronicity of tuberculosis (OR 4.8, 95% CI 2.7-8.4, P < 0.001), age >40 years (OR 1.9, 95% CI 1.1-3.2, P = 0.02) and indigenous origin (OR 0.3, 95% CI 0.13-0.75, P = 0.01). Cox-adjusted relative risks showed that MDR (RR 2.5, 95% CI 1.02-6.16, P = 0.04), HIV infection (RR 31.3, 95% CI 11.6-84.8, P < 0.001), and chronicity of tuberculosis (RR 2.1, 95% CI 1.0-4.4, P = 0.06) were associated with mortality, controlling for age. Predictors of retreatment were DR (not including MDR) (RR 2.2 95% CI 0.89-5.31, P < 0.087), MDR (RR 12.6, 95% CI 5.46-28.88, P < 0.001), and living in a household with an earthen floor (RR 2.8, 95% CI 1.27-6.13, P = 0.011). Being infected with MDR-TB was the only factor associated with a decreased likelihood of being in an RFLP cluster (OR 0.31, 95% CI 0.12-0.81, P = 0.02). CONCLUSIONS: Although MDR-TB may have decreased propensity to spread and cause disease, it has a profoundly negative impact on tuberculosis control MH - Mexico|Morelos MH - USA PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 9 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000165821700013 L2 - tuberculosis;drug resistance;RFLP;cluster;DOTS;tuberculosis control;tuberculosis treatment SO - International Journal of Tuberculosis and Lung Disease 2000 ;4(12):S168-S170 739 UI - 14788 AU - Garcia-Martinez C AU - Taguchi Y AU - Oishi A AU - Hayamizu K AD - Univ Autonoma Metropolitana, Dept Ciencias Basicas, Area Quim, Mexico City 02200, DF, MexicoNatl Inst Mat & Chem Res, Tsukuba, Ibaraki 305, JapanGarcia-Martinez, C, Univ Autonoma Metropolitana, Dept Ciencias Basicas, Area Quim, Av San Pablo 180,Col Reynosa Tamaulipas, Mexico City 02200, DF, Mexico TI - Crystal structure and preferred conformation of beta-lactams derived from (S)-1-arylethyl isocyanates and vinyl ethers AB - The configurational analysis of beta -lactams prepared from [2+2] cycloaddition of vinyl ethers to pure enantiomers of 1-arylethyl isocyanates was carried out by high resolution H-1 NMR. The addition of a chiral shift reagent revealed that the most important conformation of the studied beta -lactams in solution is that in which the methine proton, of the exocyclic stereogenic carbon, points towards the carbonyl oxygen atom. Since the configuration of the stereogenic exocyclic carbon is known, the orientation of the aromatic ring allows the correlation of the chemical shifts with the absolute configuration of the new stereogenic centers. This method is particularly useful to establish the stereochemistry of oily beta -lactams having the N-(1-arylethyl) group. The X-ray crystallographic analysis carried out with (1R,5S)-7-[(1S)-1-(1-naphthyl) ethyl]-2-oxa-7-azabicyclo[3.2.0]heptan-6-one, is consistent with the proposed model for beta -lactams in solution MH - Japan MH - Mexico|Distrito Federal PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Chemistry, Multidisciplinary;Chemistry, Organic U5 - J;Article AV - English IS - 1024-2430 UR - ISI:000165520400009 L2 - absolute configuation;chiral beta-lactams;cyclic amides;proton NMR;ring current effect;CHIRAL SHIFT-REAGENT; MTPA MOSHER AMIDES; ABSOLUTE-CONFIGURATION; ENANTIOSELECTIVE SYNTHESIS; SECONDARY-AMINES; H-1-NMR; ASSIGNMENT; ACIDS SO - Enantiomer 2000 ;5(3-4):281-287 740 UI - 15573 AU - Garcia-Mendez M AU - Castillon FF AU - Hirata GA AU - Farias MH AU - Beamson G AD - CICESE, Programa Posgrado Fis Mat, Ensenada 22800, Baja California, MexicoUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUNISON, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoSERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, EnglandFarias, MH, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - XPS and HRTEM characterization of cobalt-nickel silicide thin films AB - We studied by X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) films of Co-Ni/p-Si deposited by PLD on Si(100) substrates. They were thermally treated in vacuum to promote silicide formation. By means of XPS in-depth profiles, it was observed that the deposited metal film contains more Co than Ni. The Co and Ni 2p transitions present shifts characteristic of silicide at respective ranges of 778.3-778.6 and 853.2-853.6 eV, while the Si2p transition appears at 99.2-99.5 eV, as determined by XPS. By means of HRTEM, nanocrystalline regions belonging to CoSi2, Ni2Si and NiSi2 structures were identified. Some grains of CoSi2 are large in size, more than 20 nm in diameter, while Ni2Si and NiSi2 nanocrystals are of the order of 10 nm. There are several regions where no crystalline ordering seems to be apparent. The SiO2 layer acted as an effective diffusion barrier suppressing mobility of metal into the Si(100) substrate. The observed tendencies of the Co and Ni concentrations as a function of depth agree with a model of CoSi and NiSi structure separation and subsequent formation of CoSi2 and NiSi2. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000088469700009 L2 - x-ray photoelectron spectroscopy;Co silicides;Ni silicides;CO-SI SYSTEM; COSI2; DISILICIDE; SI(100); GROWTH; AUGER; LINE SO - Applied Surface Science 2000 ;161(1-2):61-73 741 UI - 15779 AU - Garcia-Ortega A AU - Verreth J AU - Segner H AD - Ctr Environm Res Leipzig Halle, Dept Chem Ecotoxicol, D-04301 Leipzig, GermanyWageningen Univ, Wageningen Inst Anim Sci, Fish Culture & Fisheries Grp, NL-6700 AH Wageningen, NetherlandsGarcia-Ortega, A, CIAD Unidad Mazatlan, Mazatlan 82010, Sinaloa, Mexico TI - Post-prandial protease activity in the digestive tract of African catfish Clarias gariepinus larvae fed decapsulated cysts of Artemia AB - The alkaline proteolytic activity in the gut of African catfish larvae was studied during short time ranges from 30 min to 4 h after ingestion of decapsulated Artemia cysts. The variation in total protease and trypsin activities during the day was monitored during starvation, after one single meal ingestion, and during continuous feeding. In starved larvae the enzymatic activity was low and did not change in time. No significant endogenous secretion of digestive enzymes was detected. The level of alkaline proteolytic activity found in starved larvae was further considered as the basal level. In larvae fed only one meal during the day, the enzyme activity significantly increased from 3 h post-feeding up to a maximum level found 12 h after feeding. In the larvae receiving a meal every 4 h, the effect of feeding on the proteolytic activity was significantly different from the one in fish fed only once a day. The total protease activity in this dietary treatment changed according to the time of feeding and fluctuated around a constant level, which was intermediate between the maximum and the basal level. No rhythmic cycle of enzyme production in the fish was observed when the proteolytic activity was studied during a cycle of 24 h. When specific trypsin activity was measured, a similar pattern was found as with the total protease. The contribution of digestive enzymes from Artemia to the total digestion of food by the catfish larvae was calculated to be less than 1% of the total amount of the proteolytic activity measured in the larval gut MH - Germany MH - Mexico|Sinaloa MH - Netherlands PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Fisheries;Physiology U5 - J;Article AV - English IS - 0920-1742 UR - ISI:000087909200007 L2 - digestive enzymes;enzymatic response;feeding;fish larvae;live food;protease;trypsin;BRINE SHRIMP ARTEMIA; DICENTRARCHUS-LABRAX LARVAE; SEABREAM SPARUS-AURATA; CLUPEA-HARENGUS; BURCHELL LARVAE; ENZYMES; TRYPSIN; BASS; FEED; ASSIMILATION SO - Fish Physiology and Biochemistry 2000 ;22(3):237-244 742 UI - 16442 AU - Garcia-Ramos G AU - Sanchez-Garduno F AU - Maini PK AD - Univ Oxford, Inst Math, Ctr Math Biol, Oxford OX1 3LB, EnglandUniv Texas, Dept Zool, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Fac Sci, Dept Math, Mexico City 04510, DF, MexicoMaini, PK, Univ Oxford, Inst Math, Ctr Math Biol, 24-29 St Giles, Oxford OX1 3LB, England TI - Dispersal can sharpen parapatric boundaries on a spatially varying environment AB - Parapatry describes a geographic pattern in which the ranges of two species have separate but contiguous distributions without any physical barriers between them. We present results from a study of ecological mechanisms to explain parapatry in closely related species. These include competition, spatially varying performances, and dispersal that depends on the densities of both species. We use a model consisting of two coupled nonlinear reaction-diffusion equations with density-dependent diffusion terms and space-dependent Lotka-Volterra-like competing interaction terms. The model is analyzed by using a mixture of phase-plane analysis and numerical simulations. Results show that competition and dispersal can lead to completely segregated species ranges. Spatial variation favored and provided stability to parapatric distribution. Parapatry occurred under several conditions, including when both species were identical in dispersal, intrinsic rate of growth, and competition but differed in their spatial performances. Results indicate that overlapping distributions and parapatry are equally expected for close species. Moreover, similar species in parapatry tend to exhibit equivalent range sizes. This model explains how species can coexist regionally while maintaining spatial exclusion. It also describes how a species that is rare in distribution can invade the range of a similar and widespread species. We discuss the limitations of using present species distributions for recognizing modes of speciation, and we suggest studying more extensively the relationship between density-dependent dispersal and interspecific competition. We show that density-dependent dispersal can favor segregation MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000085611400013 L2 - coexistence of species;density-dependent dispersal;dispersal vs. competition;invasion;Lotka-Volterra model, spatial variation;modeling parapatry in closely related species;parapatry, spatial model;sharp boundaries;spatial variation;species distributions;species segregation;INTERACTING POPULATIONS; SEGREGATION; COMPETITION; BIRDS; SPECIATION; DIFFUSION; EUTAMIAS; MODELS; LIMITS SO - Ecology 2000 ;81(3):749-760 743 UI - 15168 AU - Garcia-Reimbert C AU - Garza-Hume C AU - Minzoni AA AU - Reyes JA AU - Rodriguez RF AU - Smyth NF AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoFENOMEC, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, IIMAS, Dept Matemat & Mecan, Mexico City 01000, DF, MexicoFENOMEC, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept IPH, Mexico City 09340, DF, MexicoUniv Edinburgh, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandRodriguez, RF, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Active propagation and cut-off for low TM modes in a nonlinear nematic waveguide AB - Liquid crystals are optically active media whose properties may strongly vary when they an subjected to magnetic or electric fields. This high susceptibility can have a profound influence on the propagation of light through the fluid and gives rise to highly nonlinear coupling between the optical field and the reorientation. In the present work, the influence of the reorientation of the crystal on the propagation of the TM optical modes when this reorientation is due to the propagating optical field is studied. Furthermore, only the TM optical modes which couple to the reorientation are considered. The orientation of the nematic in the waveguide is taken to be such that the frequency of impinging light of low amplitude is below the cut-off frequency. However, when the impinging light wave is of sufficiently high amplitude, reorientation occurs, so that the cut-off frequency is lowered and the mode propagates through the crystal. A front of reorientation then propagates into the waveguide, which in turn makes the crystal transparent. Simplified equations governing this process are derived from the full equations for the optical field and the reorientation by noting the different time and space scales involved. These simplified equations are studied qualitatively and the induced transparency phenomenon is thus explained in terms of the bistable behaviour of the reorientation equation, this bistability being induced by the incident wave. The simplified equations are also solved numerically for a range of parameter values susceptible to experimental verification. The paper is concluded by a discussion of the advantages and limitations of the model and its possible application to other situations. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000089545200009 L2 - liquid crystals;nematic;nonlinear effects;LIQUID-CRYSTALLINE CORE; WAVE-GUIDE; OPTICAL-FIELDS; FIBER; FILM SO - Physica D 2000 ;145(1-2):144-157 744 UI - 15341 AU - Garcia-Rodriguez A AU - Rodriguez-Dagnino RM AU - Douligeris C AD - ITESM, Ctr Elect & Telecomun, Monterrey 64849, NL, Mexico. Univ Miami, Coral Gables, FL 33124, USA. Univ Piraeus, Piraeus, Greece TI - Extending the prediction horizon in dynamic bandwidth allocation for VBR video transport AB - This paper presents a dynamic bandwidth allocation system for real-time variable Lit rate (VBR) video transport in asynchronous Transfer mode (ATM) networks. This system takes advantage of scene changes in the video trace on a scale larger than a second, and it adapts the bandwidth as needed. An improvement on efficiency is achieved by assigning bandwidth for the transport of VER video and having more than one predictor in parallel with different prediction horizons, hence this scheme reduces the processing time For the bandwidth adaptation with no significant degradations on the queue statistics. The link capacity required for a specific session is a function of the input traffic, which is characterized by its spectral characteristic. In particular, we use the low frequency band of the power spectrum, which is extracted from the stochastic input Ly a low pass filter. The predictor is a neural network (NN) called "Pi-Sigma Network", and the output of this predictor is interpreted according to tie prediction horizon in use MH - Greece MH - Mexico|Nuevo Leon MH - USA T3 - MICAI 2000: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBQ61W AV - English IS - 0302-9743 UR - ISI:000088970800033 L2 - dynamic bandwidth allocation;prediction;neural network;VBR video transport SO - 2000 ;():365-375 745 UI - 15795 AU - Garcia-Sierra F AU - Hauw JJ AU - Duyckaerts C AU - Wischik CM AU - Luna-Munoz J AU - Mena R AD - Inst Politecn Nacl, CINVESTAV, Dept Physciol Biophys & Neurosci, Mexico City 07000, DF, MexicoHop La Pitie Salpetriere, Lab Neuropathol R Escourolle, Paris, FranceUniv Aberdeen, Dept Mental Hlth, Aberdeen, ScotlandMena, R, Inst Politecn Nacl, CINVESTAV, Dept Physciol Biophys & Neurosci, POB 14-740, Mexico City 07000, DF, Mexico TI - The extent of neurofibrillary pathology in perforant pathway neurons is the key determinant of dementia in the very old AB - Neurofibrillary pathology as found in Alzheimer's disease (AD) is also found in the normal elderly, suggesting that these changes may be part of the aging process. In this study, we assessed the densities and distribution of structures recognized by the monoclonal antibody (mAb) to phosphorylated tau (AT8) in the hippocampal formation and medial temporal isocortex of 19 centenarians. Of these, 4 cases were demented and 15 non-demented. AT8 immunoreactivity correlated with the global deterioration scale (GDS). The density of both intraneuronal neurofibrillary tangles (I-NFTs) and neuritic clusters (NCs) significantly correlated with the GDS in the layer II of the entorhinal cortex (r = 0.66, P = 0.005 and r = 0.611, P = 0.01, respectively). Density of I-NFTs in the subiculum (r = 0.491; P = 0.034) also correlated significantly. No other area was found to be statistically significant. Importantly, no correlation was found when demented and non-demented centenarian cases were analyzed separately, suggesting that the difference marks a fundamental shift between AD and non-demented individuals. This assertion is supported by the significantly higher densities of I-NFTs and NCs in the transentorhinal (P = 0.043 and P = 0.011, respectively) and layer II of the entorhinal cortex (P = 0.02 and P = 0.007, respectively), and I-NFTs in the subiculum (P < 0.001) and CA1 (P = 0.011) in the demented group when compared with the non-demented cases. Granular diffuse deposits, an early stage parameter of the neurofibrillary pathology involving accumulation of non-fibrillar abnormally phosphorylated tau protein did not correlate with the GDS or between the two groups studied. This study, combining morphometric and confocal analyses, not only provides further evidence that, in the brains of patients with AD, the perforant pathway is highly sensitive to tau pathology but also that involvement is distinct from the changes of normal aging, even of the oldest old MH - France MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 21 U4 - Clinical Neurology;Neurosciences;Pathology U5 - J;Article AV - English IS - 0001-6322 UR - ISI:000087849800004 L2 - Alzheimer's disease;AT8;hyperphosphorylated tau protein;neurofibrillary tangles;entorhinal cortex;PAIRED HELICAL FILAMENTS; MILD ALZHEIMERS-DISEASE; 20 FRENCH CENTENARIANS; TAU-PROTEIN; CEREBRAL-CORTEX; SENILE PLAQUES; REGIONAL DISTRIBUTION; AUTOPSY POPULATION; TANGLES; BRAINS SO - Acta Neuropathologica 2000 ;100(1):29-35 746 UI - 15757 AU - Garcia-Tello P AU - Gonzalez J AU - Valenzuela R AU - Blanco JM AD - IEHU, Fac CC Quim UPV, Dpto Fis Mat, San Sebastian 20009, Guipuzcoa, SpainEUITI, Dpto Fis Aplicada 1, San Sebastian, SpainUNAM, Inst Invest Mat, Mexico City, DF, MexicoGonzalez, J, IEHU, Fac CC Quim UPV, Dpto Fis Mat, P Manuel Lardizabal 3, San Sebastian 20009, Guipuzcoa, Spain TI - Tensile stress dependence of the coercivity and magnetostriction of stress-annealed (by Joule heating) Co66Fe4Mo2Si16B12 alloy AB - The influence of applied tensile stresses (16-45 MPa) during Joule-heating thermal treatments on samples of nominal composition Co66Fe4Mo2Si16B12 is reported. The influence of high axial stresses (0-1000 MPa, applied during measurements) on the coercive field was also investigated. The coercive field exhibited a maximum as a function of measuring stress. Very low values of the saturation magnetostriction constant have been obtained as a function of annealing stress. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000087873100088 L2 - alloys;Joule heating;tensile stress SO - Journal of Magnetism and Magnetic Materials 2000 ;215():316-318 747 UI - 15874 AU - Garcia-Varela M AU - de Leon GPP AU - de la Torre P AU - Cummings MP AU - Sarma SSS AU - Laclette JP AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoJosephine Bay Paul Ctr Comparat Mol Biol & Evolut, Marine Biol Lab, Woods Hole, MA 02543, USAUniv Nacl Autonoma Mexico, Escuela Nacl Estud Profesionales, Carrera Biol, Mexico City 54090, DF, MexicoLaclette, JP, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, AP 70228, Mexico City 04510, DF, Mexico TI - Phylogenetic relationships of Acanthocephala based on analysis of 18S ribosomal RNA gene sequences AB - Acanthocephala (thorny-headed worms) is a phylum of endoparasites of vertebrates and arthropods, included among the most phylogenetically basal tripoblastic pseudocoelomates. The phylum is divided into three classes: Archiacanthocephala, Palaeacanthocephala, and Eoacanthocephala. These classes are distinguished by morphological characters such as location of lacunar canals, persistence of ligament sacs in females, number and type of cement glands in males, number and size of proboscis hooks, host taxonomy, and ecology. To understand better the phylogenetic relationships within Acanthocephala, and between Acanthocephala and Rotifera, we sequenced the nearly complete 18S rRNA genes of nine species from the three classes of Acanthocephala and four species of Rotifera from the classes Bdelloidea and Monogononta, Phylogenetic relationships were inferred by maximum-likelihood analyses of these new sequences and others previously determined. The analyses showed that Acanthocephala is the sister group to a clade including Eoacanthocephala and Palaeacanthocephala. Archiacanthocephala exhibited a slower rate of evolution at the nucleotide level, as evidenced by shorter branch lengths for the group. We found statistically: significant support for the monophyly of Rotifera, represented in our analysis by species from the clade Eurotatoria, which includes the classes Bdelloidea and Monogononta. Eurotatoria also appears as the sister group to Acanthocephala MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 34 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0022-2844 UR - ISI:000087559200004 L2 - Acanthocephala;Archiacanthocephala;Eoacanthocephala;Palaeacanthocephala;Rotifera;Eurotatoria;Bdelloidea;Monogononta;18S rRNA;phylogeny;DNA-SEQUENCES; NEMATODA; ROTIFERA; PHYLUM; TREES SO - Journal of Molecular Evolution 2000 ;50(6):532-540 748 UI - 14828 AU - Garcia A AU - Huerta R AU - Sanchez-Colon G AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Unidad Merida, Merida 97310, Yucatan, VenezuelaGarcia, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - A priori mixing of mesons and the vertical bar Delta I vertical bar=1/2 rule in K ->pi pi AB - We consider the hypothesis of a priori mixings in the mass eigenstates of mesons to obtain tho \DeltaI\ = 1/2 rule in K --> pi pi. The Hamiltonian responsible for the transition is the strong interacting one. The experimental data are described using the isospin symmetry relations between the strong coupling constants MH - Mexico|Distrito Federal MH - Venezuela PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000165471200005 L2 - WEAK RADIATIVE DECAYS; SYMMETRY-BREAKING; QCD SO - Modern Physics Letters A 2000 ;15(28):1749-1754 749 UI - 15387 AU - Garcia A AU - Macias A AU - Puetzfeld D AU - Socorro J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoGarcia, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Plane-fronted waves in metric-affine gravity AB - We study plane-fronted electrovacuum waves in metric-affine gravity theories with a cosmological constant. Their held strengths are, on the gravitational side, curvature R-alpha(beta), nonmetricity Q(alpha beta), torsion T-alpha and, on the matter side, the electromagnetic field strength F. Our starting point is the work by Ozsvath, Robinson, and Rozga on type N gravitational fields in general relativity as coupled to null electromagnetic fields MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088793100063 L2 - POINCARE GAUGE-THEORY; STRING THEORY; SHOCK-WAVES; DILATION; COMPUTER; CHARGES SO - Physical Review D 2000 ;62(4):art-044021 750 UI - 15316 AU - Garcia AZ AU - Nash TH AU - Herrera-Campos MA AD - Arizona State Univ, Dept Plant Biol, Tempe, AZ 85287, USANatl Autonomous Univ Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoGarcia, AZ, Arizona State Univ, Dept Plant Biol, Tempe, AZ 85287, USA TI - Lichen decline in Desierto de los Leones (Mexico City) AB - We document the effect of Mexico City on the epiphytic lichens of Abies religiosa by comparing the communities occurring at Desierto de los Leones, a protected area near to the city, with those at El Chico National Park, a location 100 km upwind (or crosswind) from the city. The first community had 47% fewer species, 62% less lichen cover, and a species abundance pattern that revealed a highly disturbed community. The differences between these communities were greater at the trunk base than at the height of two m, and much stronger when evaluated from a species to species perspective. Among a variety of factors, sire air quality may account for many of the observed differences MH - Mexico|Distrito Federal MH - USA PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000089113700002 L2 - AIR-POLLUTION; EPIPHYTIC LICHENS; OZONE; MOUNTAINS; DIVERSITY; INJURY; CANADA; PARK SO - Bryologist 2000 ;103(3):428-441 751 UI - 14974 AU - Garcia HS AU - Arcos JA AU - Ward DJ AU - Hill CG AD - Univ Wisconsin, Dept Chem Engn, Madison, WI 53706, USAInst Tecnol Veracruz, UNIDA, Veracruz, MexicoHill, CG, Univ Wisconsin, Dept Chem Engn, 1415 Engn Dr, Madison, WI 53706 USA TI - Synthesis of glycerides containing n-3 fatty acids and conjugated linoleic acid by solvent-free acidolysis of fish oil AB - Menhaden oil, a rich source of n-3 fatty acids, was interesterified with conjugated linoleic acid (CLA) in a reaction medium composed solely of substrates and either free or immobilized commercial lipase preparations. Of five lipases tested, an immobilized preparation from Mucor miehei provided the fastest rate of incorporation of CLA into fish oil acylglycerols; however, and as observed with most of the lipases utilized, a significant proportion of the n-3 fatty acid residues were liberated in the process. A soluble lipase from Candida rugosa converted free CLA to acylglycerol residues while leaving the n-3 fatty acid residues virtually untouched. Even though the reaction rate was slower for this enzyme than for the other four lipase preparations, the specificity of the free C. rugosa lipase gives it the greatest potential for commercial use in preparing fish oils enriched in CLA residues but still retaining their original n-3 fatty acid residues. (C) 2000 John Wiley & Sons, Inc. Biotechnol Bioeng 70: 587-591, 2000 MH - USA MH - Mexico|Veracruz PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 21 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000165062100013 L2 - conjugated linoleic acid;fish oil;acidolysis;n-3 fatty acids;lipase;nutraceutical;CANDIDA-CYLINDRACEA LIPASE; DOCOSAHEXAENOIC ACID; INTERESTERIFICATION ACIDOLYSIS; CATALYZED INTERESTERIFICATION; EICOSAPENTAENOIC ACID; ENZYMATIC-REACTION; CONCENTRATE; SPECIFICITY; HYDROLYSIS; DERIVATIVES SO - Biotechnology and Bioengineering 2000 ;70(5):587-591 752 UI - 16270 AU - Garcia HS AU - Keough KJ AU - Arcos JA AU - Hill CG AD - Univ Wisconsin, Dept Chem Engn, Madison, WI 53706, USAInst Technol, Veracruz, MexicoHill, CG, Univ Wisconsin, Dept Chem Engn, 1415 Engn Dr, Madison, WI 53706 USA TI - Interesterification (acidolysis) of butterfat with conjugated linoleic acid in a batch reactor AB - Six commercial lipases, in free or immobilized form, were tested for their ability to catalyze acyl exchange between conjugated linoleic acid and anhydrous butterfat under solvent-free conditions. Immobilized Candida antarctica lipase exhibited the best activity. Experiments were conducted for this lipase in butterfat to conjugated linoleic acid ratios of 10:1 (vol/vol), temperatures from 30 to 70 degrees C, enzyme concentrations of 50 to 200 mg/g of reaction mixture, and water contents of 0.15 to 2% (wt/wt). At the maximum enzyme concentration used, equilibrium was reached within the first 24 h of reaction. The optimum temperature was 50 degrees C. The triacylglycerol profile of the product butterfat reflected changes in the relative proportions of fatty acid residues as the reaction proceeded, with increases in those triacylglycerols containing 46 to 54 carbon atoms and concomitant decreases in those triacylglycerols containing 34 to 42 carbon atoms MH - USA MH - Mexico|Veracruz PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 15 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000086121200001 L2 - conjugated linoleic acid;butterfat;acidolysis;interesterification;CATALYZED INTER-ESTERIFICATION; MAMMARY-CANCER PREVENTION; CHEMICAL INTERESTERIFICATION; RESTRUCTURING BUTTERFAT; BOVINE-MILK; TRIGLYCERIDE COMPOSITION; RHIZOPUS-ORYZAE; RAPESEED OIL; FATTY-ACIDS; OLEIC-ACID SO - Journal of Dairy Science 2000 ;83(3):371-377 753 UI - 14732 AU - Garcia JA AU - Pons JM AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, SpainInst Fis Altes Energies, E-08028 Barcelona, SpainUniv Texas, Dept Phys, Ctr Relat, Austin, TX 78712, USAGarcia, JA, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Rigid and gauge noether symmetries for constrained systems AB - We develop the general theory of Noether symmetries for constrained systems, that is, systems that are described by singular Lagrangians. In our derivation, the Dirac bracket structure with respect to the primary constraints appears naturally and plays an important role in the characterization of the conserved quantities associated to these Noether symmetries. The issue of projectability of these symmetries from tangent space to phase space is fully analyzed, and we give a geometrical interpretation of the projectability conditions in terms of a relation between the Noether conserved quantity in tangent space and the presymplectic form defined on it. We also examine the enlarged formalism that results from taking the Lagrange multipliers as new dynamical variables; we find the equation that characterizes the Noether symmetries in this formalism, and we also prove that the standard formulation is a particular case of the enlarged one. The algebra of generators for Noether symmetries is discussed in both the Hamiltonian and Lagrangian formalisms. We find that a frequent source for the appearance of open algebras is the fact that the transformations of momenta in phase space and tangent space only coincide on shell. Our results apply with no distinction to rigid and gauge symmetries; for the latter case are give a general proof of the existence of Noether gauge symmetries for theories with first and second class constraints that do not exhibit tertiary constraints in the stabilization algorithm. Among some examples that illustrate our results, we study the Noether gauge symmetries of the Abelian Chern-Simons theory in 2n + 1 dimensions. An interesting feature of this example is that its primary first class constraints can only be identified after the determination of the secondary constraint. The example is worked out retaining all the original set of variables MH - Mexico|Distrito Federal MH - Spain MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000165816100006 L2 - HAMILTONIAN BRST FORMALISMS; CHERN-SIMONS THEORY; 2ND-CLASS CONSTRAINTS; DYNAMICAL-SYSTEMS; FADDEEV-JACKIW; PHASE-SPACE; TRANSFORMATIONS; EQUIVALENCE; INVARIANCE; QUANTIZATION SO - International Journal of Modern Physics A 2000 ;15(29):4681-4721 754 UI - 14541 AU - Garcia JJ AU - Jones WD AD - Univ Rochester, Dept Chem, Rochester, NY 14627, USANatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Rochester, Dept Chem, Rochester, NY 14627, USAJones, WD, Univ Rochester, Dept Chem, Rochester, NY 14627, USA TI - Reversible cleavage of carbon-carbon bonds in benzonitrile using nickel(0) AB - The nickel(0) fragment [(dippe)Ni] has been found to ct-coordinate to the CN bond of benzonitrile and undergo reversible insertion into the Ph-CN bond MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 43 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000166165800002 L2 - REDUCTIVE ELIMINATION; C-H; COMPLEXES; ACTIVATION; PALLADIUM; FUNCTIONALIZATION; PLATINUM SO - Organometallics 2000 ;19(26):5544-5545 755 UI - 15477 AU - Garcia LM AU - Castro B AU - Guilhermino L AD - Univ Porto, Ctr Invest Marinha & Ambiental, Inst Ciencias Biomed Abel Salazar, Dept Estudos Populacoes,Lab Ecotoxicol, P-4050 Porto, PortugalCtr Invest Alimentac & Desarrollo AC, Unidad Mazatlan Acuicultura & Manejo Ambiental, Mazatlan 82010, Sinaloa, MexicoUniv Coimbra, Dept Zool, Inst Ambiente & Vida, P-3000 Coimbra, PortugalGuilhermino, L, Univ Porto, Ctr Invest Marinha & Ambiental, Inst Ciencias Biomed Abel Salazar, Dept Estudos Populacoes,Lab Ecotoxicol, Lg Prof Abel Salazar 2, P-4050 Porto, Portugal TI - Characterization of cholinesterase from guppy (Poecilia reticulata) muscle and its in vitro inhibition by environmental contaminants AB - With a view to using the cholinesterase (ChE) activity from guppy (Poecilia reticulata) muscle as a biomarker, the objectives of this work were: (i) to characterize the soluble cholinesterases present in muscle homogenate using different substrates and specific inhibitors, (ii) to determine the normal range of activity in non-exposed individuals and (iii) to investigate the in vitro effects of two common environmental contaminants, copper sulphate and dodecylbenzene sulphonic acid sodium salt (DBS) on ChE activity. The rate of substrate hydrolysis of P. reticulata ChE decreased in the order acetylthiocholine, propionylthiocholine and butyrylthiocholine. Inhibition by excess of substrate was observed at concentrations higher than 1.28 mM. Furthermore, eserine sulphate and 1,5-bis(4-allyldimethylammoniumphenyl) -pentan-3-one (BW284C51) significantly inhibited the enzyme activity at low concentrations (mM range) and N,N'-diisopropylphosphorodiamic acid (iso-OMPA) had no significant effect up to 8 mM. These findings suggest that the enzyme measured in this study is acetylcholinesterase. The activity determined in non-exposed fish was 145.1+/-44.7 SD U mg(-1) protein. The common environmental contaminants copper and DBS significantly inhibited P. reticulata ChE at concentrations that can be ecologically relevant MH - Mexico|Sinaloa MH - Portugal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology;Toxicology U5 - J;Article AV - English IS - 1354-750X UR - ISI:000088672500004 L2 - biomarkers;cholinesterases;Poecilia reticulata;DBS;Cu2+;ACETYLCHOLINESTERASE ACTIVITY; DAPHNIA-MAGNA; POLLUTANTS; BIOMARKERS; RESISTANT; INVITRO; ORGANOPHOSPHORUS; INSECTICIDES; SPECIFICITY; SENSITIVITY SO - Biomarkers 2000 ;5(4):274-284 756 UI - 15620 AU - Garcilazo H AU - Pena MT AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoInst Super Tecn, Dept Fis, Ctr Fis Interaccoes Fundamentais, P-1096 Lisbon, PortugalGarcilazo, H, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - pi d ->eta NN reaction near threshold AB - We calculated the differential and total cross sections of the reaction pi d--> eta NN near threshold taking into account all the single- and double-scattering graphs within a relativistic formalism. The net effect of the second order diagrams is very small since there is a strong cancellation between the pion-exchange diagram and the sum of the eta exchange with the nucleon-nucleon final state interaction diagrams. Our theoretical results are compared with recent experimental data for the differential yield, corresponding to the counting rate for the detection of the two photons into which the produced eta decays. The quality of the agreement between theory and existing data between 35 and 100 MeV above threshold does not indicate, at those energies, effects of a possible eta NN quasibound state MH - Mexico|Distrito Federal MH - Portugal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000088139200002 L2 - DEUTERON SCATTERING; NEAR-THRESHOLD; 3-CHANNEL; SYSTEM; MODEL SO - Physical Review C 2000 ;6201(1): 757 UI - 15810 AU - Garcilazo H AU - Pena MT AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoCtr Fis Interaccoes Fundamentais, P-1049001 Lisbon, PortugalInst Super Tecn, Dept Fis, P-1049001 Lisbon, PortugalGarcilazo, H, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - eta d scattering in the region of the S-11 resonance AB - We have studied the reaction eta d-->eta d close to threshold within a nonrelativistic three-body formalism. We considered several eta N and NN models, in particular potentials with separable form, fitted to the low-energy eta N and NN data to represent the two-body interactions. We found that with realistic two-body interactions a quasibound state does not exist in this system, although there is an enhancement of the cross section by one order of magnitude, in the region near threshold, which is a genuine three-body effect not predicted within the impulse approximation MH - Mexico|Distrito Federal MH - Portugal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000087575000016 L2 - FREE P+N->D+ETA REACTION; NEAR-THRESHOLD; PI-N->ETA-N; 3-CHANNEL; LENGTH; STATE SO - Physical Review C 2000 ;6106(6): 758 UI - 15058 AU - Gardea-Torresdey JL AU - Tiemann KJ AU - Gamez G AU - Dokken K AU - Cano-Aguilera I AU - Furenlid LR AU - Renner MW AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAUniv Guanajuato, Fac Quim, Guanajuato, MexicoUniv Arizona, Ctr Opt Sci, Tucson, AZ 85719, USABrookhaven Natl Lab, Dept Appl Sci, Upton, NY 11973, USAGardea-Torresdey, JL, Univ Texas, Dept Chem, El Paso, TX 79968, USA TI - Reduction and accumulation of gold(III) by Medicago sativa alfalfa biomass: X-ray absorption spectroscopy, pH, and temperature dependence AB - We report herein the use of Medicago sativa alfalfa shoot biomass for the removal of gold from aqueous solutions. The accumulation process involves the reduction of Au(lll) to colloidal Au(0) and is shown to increase at elevated temperatures and at lower pH. X-ray absorption spectroscopy (XAS) was used to determine that gold(lll) was reduced to form gold(0) colloids, which varied in size depending on the pH of the initial solution. The gold cluster radius was 6.2 +/- 1 Angstrom at pH 5 and 9.0 +/- 1 Angstrom at pH 2. Our findings indicate that essentially another layer of gold atoms was deposited onto the colloid surface at pH 2. Possible mechanisms of bioreduction and accumulation are discussed MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0013-936X UR - ISI:000089970000021 L2 - GOLD NANOPARTICLES; ALGAL BIOMASS; COPPER IONS; ADSORPTION; BINDING; EXAFS; BIOSORPTION; COMPLEXES; CR(III); LIGANDS SO - Environmental Science & Technology 2000 ;34(20):4392-4396 759 UI - 14738 AU - Gardi A AU - Cocco M AU - Negredo AM AU - Sabadini R AU - Singh SK AD - Univ Milan, Dipartimento Sci Terra, Sez Geofis, I-20133 Milan, ItalyIst Nazl Geofis, I-00161 Rome, ItalyUNAM, Inst Geofis, Mexico City, DF, MexicoGardi, A, Univ Milan, Dipartimento Sci Terra, Sez Geofis, I-20133 Milan, Italy TI - Dynamic modelling of the subduction zone of central Mexico AB - In central Mexico some significant normal faulting events have occurred within the subducted oceanic Cocos plate, just below or near the down-dip edge of the strongly coupled interface. These normal faulting shocks followed large shallow thrust earthquakes. in other subduction zones such events generally precede the up-dip thrust events. A vertical 2-D finite element modelling has been used to simulate the subduction of the Cocos plate beneath the North American plate when the slab is driven by an active convergence velocity or slab pull. We find that the latter mechanism plays only a minor role due to shallow subduction. The modelling results show that the stress pattern is very sensitive to the geometry of the plates. In particular, normal faulting earthquakes that follow large thrust events can be explained on the basis of the flexural response of the overriding and subducting plates to the peculiar geometry of this subduction zone, where the subducting slab becomes horizontal at about 100 km from the trench. This horizontal part of the subducting plate, down-dip with respect to the main thrust zone, is under an extensional stress field. This provides an alternative explanation to the slab pull for the occurrence of normal faulting intraplate earthquakes. In order for normal faulting earthquakes to occur in the early part of the seismic cycle, it is necessary that the large up-dip thrust events have a partial stress drop. We find that for small fractional stress drop, a wide region of extension remains below the down-dip edge of the main fault plane following a large thrust earthquake. Thus, the main thrust earthquakes do not invert the polarity of the active stress field, which is compressional and extensional up-dip and down-dip, respectively, with respect to the main thrust fault. Larger fractional stress drops result in larger delays in the occurrence of normal faulting events after the main thrust events MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000165604500023 L2 - earthquake cycle;Mexico;stress distribution;subduction;INTERMEDIATE-DEPTH EARTHQUAKES; COCOS PLATE; TECTONIC IMPLICATIONS; TEMPORAL VARIATION; SLIP DISTRIBUTION; SEISMICITY; DEFORMATION; STRESS; MICHOACAN; GEOMETRY SO - Geophysical Journal International 2000 ;143(3):809-820 760 UI - 15213 AU - Garibay-Febles V AU - Calderon HA AU - Cabrera A AU - Umemoto M AU - Cabanas-Moreno JG AU - Tsuchiya K AD - Inst Politecn Nacl, DIM, ESIQIE, Mexico City 07738, DF, Mexico. Inst Politecn Nacl, ESFM, Mexico City 07738, DF, Mexico. Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan TI - Production and characterization of nanostructured Ti-based intermetallics AB - TiAl-X and TiA(3)-X alloys are produced by mechanical milling and sintered by a plasma assisted technique (X represents either Fe, Mn or Cr). Milling of elemental powder mixtures produces a homogeneous mixture consisting of crystallites inmersed in an amorphous matrix. Sintering gives rise to a recrystallized single phase microstructure in the TiAl3-X alloys with a nanometric grain size. Alloys in the system TiAl-X also show a fine grain size after consolidation. Two phases alpha(2) (DO19) and gamma (Ll(0)) are found finely dispersed. Compression test are used to investigate the deformation mechanism in the consolidated alloys. The TiAl3-X alloys show no plasticity; fracture appears before any plastic behavior is observed at high stress levels. In the TiAl-X alloys plasticity is found in all cases together with high yield stresses. Analysis of the fracture surfaces (TiAl3 alloys) and dislocation structures is used to discuss the deformation mechanism MH - Japan MH - Mexico|Distrito Federal T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMPart 1&2BQ75R AV - English IS - 0255-5476 UR - ISI:000089403900119 L2 - compression test;intermetallic;mechanical alloying;nanocrystalline;spark plasma sintering SO - 2000 ;():767-772 761 UI - 15216 AU - Garibay-Febles V AU - Calderon HA AU - Robles-Hernadez FC AU - Umemoto M AU - Masuyama K AU - Cabanas-Moreno JG AD - IPN, DIM, ESIQIE, Mexico City 07738, DF, MexicoToyohashi Univ Technol, Toyohashi, Aichi 441, Japan TI - Production and characterization of (Al, Fe)-C (graphite or fullerene) composites prepared by mechanical alloying AB - (Al, Fe)-C-graphite and (Al, Fe)-C-fullerene composites have been prepared by mechanical alloying using ball milling of powders. Consolidation has been achieved by a spark plasma sintering technique (SPS). Results of XRD and TEM indicate that pure fullerene withstands milling. SEM results show homogeneous powders after milling but with different morphologies depending on the specific system. Milling produces a fine mixture of Al or Fe and graphite or fullerene. SPS produces a dense material with a nanocrystalline structure. The sintered samples have a metallic matrix (Al or Fe) with a fine dispersion ofAl(4)C(3) in the case of Al-C-(graphite (or fullerene)), Fe3C in the case of Fe-C-(graphite), and fullerene in the case of Fe-C-(fullerene). Hardness measurements show that higher values are obtained in the Al-C-(fullerene) and Fe-C-(graphite) specimens MH - Japan MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1042-6914 UR - ISI:000089409800005 L2 - ALUMINUM; CARBON; C-60 SO - Materials and Manufacturing Processes 2000 ;15(4):547-567 762 UI - 15008 AU - Garrido-Ramirez ER AU - Sudarshana MR AU - Gilbertson RL AD - Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616, USAGilbertson, RL, INIFAP, Campo Expt Ctr Chiapas,Apdo Postal 1, Ocozocoautla 29140, Chis, Mexico TI - Bean golden yellow mosaic virus from Chiapas, Mexico: Characterization, pseudorecombination with other bean-infecting geminiviruses and germ plasm screening AB - The complete nucleotide (nt) sequences of the cloned DNA-A (2644 nts) and DNA-B (2609 nts) components of Bean golden yellow mosaic virus (BGYMV-MX) from Chiapas, Mexico were determined. The genome organization of BGYMV-MX is similar to that of other Western Hemisphere bipartite geminiviruses (genus Begomovirus). Infectivity of the cloned BGYMV-MX DNA components in common bean (Phaseolus vulgaris) plants was demonstrated by particle bombardment and agroinoculation. BGYMV-MX was identified as a BGYMV (previously type II BGMV) isolate based on sequence analyses, sap-transmissibility, and pseudorecombination experiments with other bean-infecting begomo-viruses. On the basis of differences in the DNA-B hypervariable region, symptom phenotype, and properties of infectious pseudorecombinants, BGYMV-MX may represent a distinct strain of BGYMV. Pseudorecombination experiments further established that BGYMV symptom determinants mapped to DNA-B, and that BGYMV-MX was most closely related to BGYMV from Guatemala. A Tomato leaf crumple virus (TLCrV) DNA-A/BGYMV-MX DNA-B pseudorecombinant was infectious in bean, establishing that a viable reassortant can be formed between begomovirus species from different phylogenetic clusters. Bean germ plasm representing the two major gene pools (Andean and Mesoamerican) was screened for response to BGYMV-MX with three methods of inoculation: sap-inoculation, particle bombardment, and agroinoculation. Andean germ plasm was very susceptible and similar results were obtained with all three methods, whereas Mesoamerican germ plasm showed resistance to BGYMV-MX, particularly with agroinoculation MH - Mexico|Chiapas MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000090072400006 L2 - POLYMERASE CHAIN-REACTION; CLONED DNA-COMPONENTS; LEAF CURL VIRUS; BIPARTITE GEMINIVIRUSES; NUCLEOTIDE-SEQUENCE; HOST ADAPTATION; TOMATO MOTTLE; PHASEOLUS; VARIABILITY; REPLICATION SO - Phytopathology 2000 ;90(11):1224-1232 763 UI - 15843 AU - Garza-Sanchez F AU - Zertuche-Gonzalez JA AU - Chapman DJ AD - Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoChapman, DJ, Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA TI - Effect of temperature and irradiance on the release, attachment and survival of spores of Gracilaria pacifica Abbott (Rhodophyta) AB - The maintenance of isomorphic life histories in algae has been difficult to explain when there is no difference between the ecological niche of the two adult phases. However, at the level of spores, physiological differences could exist in the reproduction and development between tetraspores and carpospores that could influence the composition of both phases in the field and interspecific competition. The release, attachment (winter vs. beginning of autumn) and survival (seasonal), of tetraspores and carpospores of Gracilaria pacifica Abbott from Estero de Punta Banda, Baja California, Mexico, were studied in a gradient of temperature and irradiance. The release of tetraspores was directly affected by irradiance, while that of carpospores was affected by irradiance and temperature. The attachment of tetraspores was directly affected by temperature and season while the attachment of carpospores showed a response to changes in irradiance. Survival was influenced mainly by seasons. In spring, summer, and autumn (May, August-September, and November/December respectively) both types of spores responded similarly, with the lowest survival rate in summer and the highest in other seasons. However in winter (January/February), the rate of survival of tetraspores was an order of magnitude greater than in carpospores. The highest survival rate occurred at 21 degrees C and 24 degrees C, whereas the survival rate at 15 degrees C was close to zero for both types of spores. These different responses between tetraspores and carpospores, suggest a different ecophysiological response with regard to survival and interspecific competition in nature of the gametophyte vs sporophyte MH - USA MH - Mexico|Baja California PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000087620200001 L2 - REPRODUCTION; PHENOLOGY; SEAWEEDS; GROWTH SO - Botanica Marina 2000 ;43(3):205-212 764 UI - 15117 AU - Garza J AU - Nichols JA AU - Dixon DA AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoGarza, J, Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - The role of the local-multiplicative Kohn-Sham potential on the description of occupied and unoccupied orbitals AB - The optimum local-multiplicative exchange potential was found using as input the Hartree-Fock electron density, for the molecular systems: H-2, LiH, HF, NH3, CH4, H2O, N-2, CO, F-2, C2H2 and C2H4. The Zhao and Parr method was used to obtain the local-multiplicative potential where the kinetic energy is minimized using a constrained-search formulation of density functional theory. Two orbital sets were compared, those obtained with the nonlocal Hartree-Fock potential and those obtained with the local-multiplicative potential, both sets yielding the same electron density. As expected, the highest occupied molecular orbital (HOMO) energy was similar in both orbital sets. In contrast, the virtual orbital energies, and in particular the lowest unoccupied molecular orbital (LUMO), exhibited considerable differences. The Hartree-Fock LUMO energy goes to zero in a complete basis set limit and to nearly zero with reasonably large basis sets (e.g., augmented triple zeta) with sufficient diffuse functions added. The LUMO provided by the local-multiplicative potential using the same large basis set goes to a bounded energy not equal to zero. The nonlocal Hartree-Fock potential generates a large gap between the HOMO and LUMO energies; this difference is equal to the negative of the HOMO energy at the complete basis set limit. Contrary to this behavior, the gap obtained with the local-multiplicative potential is a reasonable approximation to the lowest experimental vertical excitation energy. For some of the molecules tested, the ordering of the orbitals corresponding to the HF and local-multiplicative potential are different. (C) 2000 American Institute of Physics. [S0021-9606(00)30439-1] MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 26 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000089635200003 L2 - DENSITY-FUNCTIONAL THEORY; EXCHANGE-CORRELATION POTENTIALS; SELF-INTERACTION CORRECTION; MODIFIED VIRTUAL ORBITALS; HARTREE-FOCK THEORY; EXCITATION-ENERGIES; ELECTRON-DENSITIES; WAVE-FUNCTIONS; MOLECULAR-SYSTEMS; SPIN-DENSITY SO - Journal of Chemical Physics 2000 ;113(15):6029-6034 765 UI - 15873 AU - Garza J AU - Vargas R AU - Vela A AU - Sen KD AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoUniv Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, IndiaGarza, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, AP 55-534, Mexico City 09340, DF, Mexico TI - Shell structure in free and confined atoms using the density functional theory AB - The average local electrostatic potential function, defined as the electrostatic potential divided by the electron density, is used to study the shell structure in free and confined atoms within Kohn-Sham density functional theory. Several exchange correlation functionals have been used to calculate the average potential function. It was observed that the self-interaction correction significantly alters the shell structure along the large radial distances. Many electron atoms confined in a sphere exhibit a gradual loss of the shell structure as the confinement is increased. The loss of structure can be characterized by the sphere radius r(c) and in the limit r(c) --> 0, the electron gas behavior is obtained. (C) 2000 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000087541100022 L2 - electrostatic potential;exchange-correlation functionals;radial density distribution function;MANY-ELECTRON SYSTEMS; HARTREE-FOCK; BOUNDARIES; EXCHANGE SO - Journal of Molecular Structure-Theochem 2000 ;501():183-188 766 UI - 16114 AU - Garza J AU - Nichols JA AU - Dixon DA AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoPacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAGarza, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, AP 55-534, Mexico City 09340, DF, Mexico TI - The optimized effective potential and the self-interaction correction in density functional theory: Application to molecules AB - The Krieger, Li, and Iafrate approximation to the optimized effective potential including the self-interaction correction for density functional theory has been implemented in a molecular code, NWChem, that uses Gaussian functions to represent the Kohn and Sham spin-orbitals. The differences between the implementation of the self-interaction correction in codes where planewaves are used with an optimized effective potential are discussed. The importance of the localization of the spin-orbitals to maximize the exchange-correlation of the self-interaction correction is discussed. We carried out exchange-only calculations to compare the results obtained with these approximations, and those obtained with the local spin density approximation, the generalized gradient approximation and Hartree-Fock theory. Interesting results for the energy difference (GAP) between the highest occupied molecular orbital, HOMO, and the lowest unoccupied molecular orbital, LUMO, (spin-orbital energies of closed shell atoms and molecules) using the optimized effective potential and the self-interaction correction have been obtained. The effect of the diffuse character of the basis set on the HOMO and LUMO eigenvalues at the various levels is discussed. Total energies obtained with the optimized effective potential and the self-interaction correction show that the exchange energy with these approximations is overestimated and this will be an important topic for future work. (C) 2000 American Institute of Physics. [S0021-9606(00)30114-3] MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 47 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000086617600016 L2 - AB-INITIO; EXCITATION-ENERGIES; EXCHANGE-ENERGY; NEGATIVE-IONS; HARTREE-FOCK; BASIS-SETS; SYSTEMS; HYDROGEN; STATES; APPROXIMATIONS SO - Journal of Chemical Physics 2000 ;112(18):7880-7890 767 UI - 16672 AU - Garza J AU - Nichols JA AU - Dixon DA AD - Pacific NW Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Bas & Ingn, Mexico City 09340, DF, MexicoGarza, J, Pacific NW Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - The Hartree product and the description of local and global quantities in atomic systems: A study within Kohn-Sham theory AB - The Hartree product is analyzed in the context of Kohn-Sham theory. The differential equations that emerge from this theory are solved with the optimized effective potential using the Krieger, Li, and Iafrate approximation, in order to get a local potential as required by the ordinary Kohn-Sham procedure. Because the diagonal terms of the exact exchange energy are included in Hartree theory, it is self-interaction free and the exchange potential has the proper asymptotic behavior. We have examined the impact of this correct asymptotic behavior on local and global properties using this simple model to approximate the exchange energy. Local quantities, such as the exchange potential and the average local electrostatic potential are used to examine whether the shell structure in an atom is revealed by this theory. Global quantities, such as the highest occupied orbital energy (related to the ionization potential) and the exchange energy are also calculated. These quantities are contrasted with those obtained from calculations with the local density approximation, the generalized gradient approximation, and the self-interaction correction approach proposed by Perdew and Zunger. We conclude that the main characteristics in an atomic system are preserved with the Hartree theory. In particular, the behavior of the exchange potential obtained in this theory is similar to those obtained within other Kohn-Sham approximations. (C) 2000 American Institute of Physics. [S0021-9606(00)31401-5] MH - USA MH - Mexico|Distrito Federal PB - WOODBURY: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000084598900011 L2 - DENSITY-FUNCTIONAL THEORY; SELF-INTERACTION CORRECTION; NMR SHIELDING CONSTANTS; AB-INITIO PREDICTION; SPIN-DENSITY; 2ND-ORDER HYPERPOLARIZABILITIES; VIBRATIONAL FREQUENCIES; POLYATOMIC-MOLECULES; DIPOLE-MOMENTS; EXCHANGE SO - Journal of Chemical Physics 2000 ;112(3):1150-1157 768 UI - 15881 AU - Garza RSM AU - Geissman JW AU - Lucas SG AD - Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131, USANew Mexico Museum Nat Hist & Sci, Albuquerque, NM 87104, USAGarza, RSM, Univ Nacl Autonoma Mexico, Unidad Ciencias Tierra, Campus Juriquilla, Queretaro 76230, Mexico TI - Palaeomagnetism and magnetostratigraphy of uppermost Permian strata, southeast New Mexico, USA: Correlation of the Permian-Triassic boundary in non-marine environments AB - Continental red sandstone and siltstone rocks of the Dewey Lake (Quartermaster) Formation at Maroon Cliffs, near Carlsbad, New Mexico, are characterized by two components of magnetization with partially overlapping laboratory unblocking temperature spectra. Both magnetizations display high coercivities (>100 mT), probably residing in haematite. A north-directed magnetization with steep positive inclination unblocks between 100 and 650 degrees C, isolating a predominantly northwest-directed magnetization, with shallow inclination, of near uniform normal polarity and maximum unblocking temperatures of 680 degrees C. We collected samples from 24 palaeomagnetic sites (i.e. individual beds) from a similar to 60 m thick section of flat-lying strata disconformably overlying carbonate and evaporite rocks of the Rustler Formation. The upper member of the Rustler Formation contains a Late Permian (early Changxingian) marine invertebrate and conodont fauna. Of the sampled sites, four yield only steep magnetizations, interpreted to be recent overprints. Eight sites did not yield well-grouped site means and were excluded from the final calculations. The formation mean (dec = 337.7 degrees, inc = 9.2 degrees; k = 31.6, alpha(95) = 7.8 degrees, N = 12 sites) defines a palaeomagnetic pole located at 55.2 degrees N, 117.5 degrees E, in good agreement with other Late Permian North American cratonic poles. Correlation of the short polarity sequence of this section of Dewey Lake strata is unambiguous. Compared with the polarity stratigraphy of marine sections in Asia, and supported by isotopic age determinations on a widespread bentonite bed in Dewey Lake strata in west Texas (approximately 251 Ma) and fossil data for the underlying Rustler Formation, the magnetostratigraphy is consistent with deposition of the Dewey Lake Formation during the latest Changxingian (Late Permian) stage MH - Mexico|Queretaro MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000087554000019 L2 - magnetostratigraphy;palaeomagnetism;Permian;SHANXI PROVINCE; NORTH-AMERICA; CHINA; SECTION; TAIYUAN; END SO - Geophysical Journal International 2000 ;141(3):778-786 769 UI - 15555 AU - Garzon-Rodriguez W AU - Vega A AU - Sepulveda-Becerra M AU - Milton S AU - Johnson DA AU - Yatsimirsky AK AU - Glabe CG AD - Univ Calif Irvine, Dept Biochem & Mol Biol, Irvine, CA 92697, USAUniv Calif Irvine, Dept Biol Chem, Irvine, CA 92697, USAUniv Calif Riverside, Div Biomed Sci, Riverside, CA 92512, USANatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoGlabe, CG, Univ Calif Irvine, Dept Biochem & Mol Biol, Irvine, CA 92697 USA TI - A conformation change in the carboxyl terminus of Alzheimer's A beta(1-40) accompanies the transition from dimer to fibril as revealed by fluorescence quenching analysis AB - Alzheimer's disease is characterized by the presence of insoluble, fibrous deposits composed principally of amyloid beta (A beta) peptide. A number of studies have provided information on the fibril structure and on the factors affecting fiber formation, but the details of the fibril structure are not known. We used fluorescence quenching to investigate the solvent accessibility and surface charge of the soluble A beta(1-40) dimer and amyloid fibrils, Analogs of A beta(1-40) containing a single tryptophan were synthesized by substituting residues at positions 4, 10, 34, and 40 with tryptophan, Quenching measurements in the dimeric state indicate that the amino-terminal analogs (A beta F4W and A beta Y10W) are accessible to polar quenchers, and the more carboxyl-terminal analog A beta V34W is less accessible. A beta V40W, on the other hand, exhibits a low degree of quenching, indicating that this residue is highly shielded from the solvent in the dimeric state. Correcting for the effect of reduced translational and rotational diffusion, fibril formation was associated with a selective increase in solvent exposure of residues 34 and 40, suggesting that a conformation change may take place in the carboxyl-terminal region coincident with the dimer to fibril transition MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000088419400009 L2 - BETA-AMYLOID PROTEIN; INTRINSIC FLUORESCENCE; ACETYLCHOLINE-RECEPTOR; TRYPTOPHAN RESIDUES; PEPTIDE; DISEASE; AGGREGATION; BINDING; DEPOSITION; INVITRO SO - Journal of Biological Chemistry 2000 ;275(30):22645-22649 770 UI - 14714 AU - Garzon IL AU - Rovira C AU - Michaelian K AU - Beltran MR AU - Ordejon P AU - Junquera J AU - Sanchez-Portal D AU - Artacho E AU - Soler JM AD - Univ Autonoma Madrid, Dept Fis Mat Condensada C 3, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 01000, DF, MexicoUniv Barcelona, E-08028 Barcelona, SpainCSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, SpainUniv Illinois, Mat Res Lab, Urbana, IL 61801, USAHarvard Univ, Dept Phys, Lyman Lab, Cambridge, MA 02138, USAGarzon, IL, Univ Autonoma Madrid, Dept Fis Mat Condensada C 3, E-28049 Madrid, Spain TI - Do thiols merely passivate gold nanoclusters? MH - Mexico|Distrito Federal MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 66 U4 - Physics, Multidisciplinary U5 - J;Letter AV - English IS - 0031-9007 UR - ISI:000165800000059 L2 - ELECTRONIC-STRUCTURE SO - Physical Review Letters 2000 ;85(24):5250-5251 771 UI - 16189 AU - Gasparian V AU - Villanueva JAL AD - Univ Guanajuato, Fac Quim, Guanajuato 36000, MexicoUniv Granada, Dept Elect & Tecnol Comp, E-18071 Granada, SpainYerevan State Univ, Dept Phys, Yerevan 375049, ArmeniaGasparian, V, Univ Guanajuato, Fac Quim, Guanajuato 36000, Mexico TI - The escape time of electrons from localised states AB - The two components of the complex escape time tau(esc)(k) = tau(1)(esc)(k) - i tau(2)(esc)(k) for an electron from a localised state in a one-dimensional disordered system are shown to be connected by Kramers-Kronig integral relations. In the complex k plane, tau(1) and tau(2) form an elliptic contour. Component tau(2)(esc)(k) in the case of an opaque barrier at an energy close to the bound level in the well, coincides with the lifetime expression MH - Armenia MH - Mexico|Guanajuato MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000086431000061 SO - Physica Status Solidi B-Basic Research 2000 ;218(1):299-302 772 UI - 14901 AU - Gavazzi G AU - Bonfanti C AU - Pedotti P AU - Boselli A AU - Carrasco L AD - Univ Studi Milano Bicocca, I-20126 Milan, ItalyAstron Spatiale Lab, F-13376 Marseille 12, FranceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoGavazzi, G, Univ Studi Milano Bicocca, Pzza Ateneo Nuovo 1, I-20126 Milan, Italy TI - Optical spectroscopy of galaxies in the direction of the Virgo cluster AB - Optical spectroscopy of 76 galaxies, 48 of which are projected in the direction of the Virgo cluster and 28 onto the Coma-A1367 supercluster, is reported. Adding these new measurements to those found in the literature, the redshift completeness in the Virgo region becomes 92% at B-T less than or equal to 16.0 and 68% at B-T less than or equal to 18.0. The one of CGCG galaxies in the direction of the Coma-A1367 supercluster becomes 98%. The Virgo cluster membership estimates obtained on morphological grounds by Binggeli et al. (1985) are confirmed in all cases. However, several "possible members" classified as BCD (if in the cluster) are found instead to be giant emission-line galaxies in the background of the Virgo cluster MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000165257300004 L2 - galaxies : clusters;virgocluster;galaxies : distances and redshifts;SPIRAL GALAXIES; AREA; CATALOG SO - Astronomy & Astrophysics Supplement Series 2000 ;146(2):259-265 773 UI - 16010 AU - Gaxiola E AU - Vlietstra RE AU - Brenner AS AU - Browne KF AU - Ebersole DG AU - Roman L AU - Kerensky RA AD - Watson Clin LLP, Lakeland, FL, USAGaxiola, E, Dinam Diagnost Med, Pablo Casals 640, Guadalajara, Jalisco, Mexico TI - Diabetes and multiple stents independently double the risk of short-term revascularization AB - Several studies show worse outcome for diabetic patients after percutaneous transluminal coronary angioplasty (PTCA). There are relatively few studies evaluating outcome in the modern era of coronary stenting. We compared the incidence of death, myocardial infarction (MI) and repeat target lesion revascularization (RTLR) by PTCA or coronary artery bypass grafting (CABG) over a 6-month follow-up in 110 diabetic and 400 nondiabetic patients receiving Palmaz-Schatz stents. All patients received aspirin/ticlopidine and stents were deployed using high-pressure inflations. Seventy-jive (68.2%) diabetic patients and 272 (68%) nondiabetic patients had single stents, while 35 (31.8%) diabetic and 128 (32%) nondiabetic patients had multiple stents (greater than or equal to 2 stents in the same vessel). The success rate and acute major complications were not significantly different between diabetic and nondiabetic patients. There was also no significant difference in death, MI, and repeat PTCA between these two groups. Diabetic patients underwent CABG more frequently than nondiabetic patients (12.7% vs 3.2%, respectively, P = 0.001) and diabetic patients also had RTLR more frequently than nondiabetic patients (25.5% vs 12.8%, respectively, P = 0.002) during 6-month follow-up. Multivariate analysis showed that diabetes and multiple stents independently contributed to the 6-month RTLR rate. Coronary stenting in diabetic patients can be carried out with a high success rate and low incidence of acute major complications. The presence of diabetes mellitus and multiple stent placement significantly increase the incidence of repeat target lesion revascularization MH - Mexico|Jalisco MH - USA PB - ARMONK: FUTURA PUBL CO RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0896-4327 UR - ISI:000087008100004 L2 - CORONARY-ARTERY DISEASE; BALLOON ANGIOPLASTY; RESTENOSIS; MELLITUS; PLACEMENT SO - Journal of Interventional Cardiology 2000 ;13(2):87-91 774 UI - 15835 AU - Gazarian KG AU - Gazarian TG AU - Solis CF AU - Hernandez R AU - Shoemaker CB AU - Laclette JP AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biotechnol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Publ Hlth, Mexico City 04510, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USAGazarian, KG, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biotechnol, Aportado Postal 70228,Ciudad Univ 04510, Mexico City 04510, DF, Mexico TI - Epitope mapping on N-terminal region of Taenia solium paramyosin AB - Epitope mapping of the amino-terminal 20aa sequence from Taenia solium paramyosin (TPmy), an immunodominant protein involved in the complex host-parasite relationship in human and porcine cysticercosis is reported. A 12-mer random peptide phage display library was screened with antibodies raised against a synthetic peptide corresponding to the amino-terminal 20aa sequence of TPmy, its highly immunodominant region. In total, 57 clones isolated in two panning conditions were analyzed, of which a single group of 14 sequences found in 25 clones shared a consensus motif showing structural similarity with the antigen Arg10-Thr16 region. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Immunology U5 - J;Article AV - English IS - 0165-2478 UR - ISI:000087734500010 L2 - Taenia solium;paramyosin;epitope;phage display;SCHISTOSOMA-MANSONI; IGE ANTIBODY; PEPTIDE; PHAGE; LIBRARIES; INDUCTION; JAPONICUM; ANTIGEN SO - Immunology Letters 2000 ;72(3):191-195 775 UI - 15283 AU - Gaztanaga E AU - Fosalba P AU - Elizalde E AD - CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainINAOE, Puebla 7200, MexicoEuropean Space Agcy, European Space Res & Technol Ctr, Dept Space Sci, NL-2200 AG Noordwijk, NetherlandsGaztanaga, E, CSIC, Inst Estudis Espacials Catalunya, Edifici Nexus,Gran Capita 2-4, E-08034 Barcelona, Spain TI - Gravitational evolution of the large-scale probability density distribution: The edgeworth and gamma expansions AB - The gravitational evolution of the cosmic one-point probability distribution function (PDF) has been estimated using an analytic approximation that combines gravitational perturbation theory with the Edgeworth expansion around a Gaussian PDF. Despite the remarkable success of the Edgeworth expansion in modeling the weakly nonlinear growth of fluctuations around the peak of the cosmic PDF, it fails to reproduce the expected behavior in the tails of the distribution. This expansion is also ill defined, since it predicts negative densities and negative probabilities for the cosmic fields. This is a natural consequence of using an expansion around the Gaussian distribution, which is not rigorously well defined when describing a positive variate such as the density held. Here we present an alternative to the Edgeworth series based on an expansion around the gamma PDF. The gamma expansion is designed to converge when the PDF exhibits exponential tails, which are predicted by perturbation theory in the weakly nonlinear regime, and are found in numerical simulations from Gaussian initial conditions. The proposed expansion is better suited to describing a real PDF, since it always yields positive densities and the PDF is effectively positive-definite. We compare the performance of the Edgeworth and the gamma expansions for a wide dynamic range, making use of cosmological N-body simulations and assessing their range of validity. In general, the gamma expansion provides an interesting and simple alternative to the Edgeworth series, and it should be useful for modeling non-Gaussian PDFs in other contexts, such as in the cosmic microwave background MH - Mexico|Puebla MH - Netherlands MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089252600005 L2 - large-scale structure of universe;methods : n-body simulations;COSMOLOGICAL PERTURBATION-THEORY; SPHERICAL COLLAPSE MODEL; FLUCTUATIONS; STATISTICS; APPROXIMATION; FIELD; COUNTS; CELLS; VOIDS SO - Astrophysical Journal 2000 ;539(2):522-531 776 UI - 16397 AU - Gaztanaga E AU - Dalton GB AD - Inst Estudis Espacials Catalunya, CSIC, Barcelona 08034, SpainINAoE, Puebla 7200, MexicoUniv Oxford, Oxford OX1 3RH, EnglandGaztanaga, E, Inst Estudis Espacials Catalunya, CSIC, Edf Nexus 104,C Gran Capitan 2-4, Barcelona 08034, Spain TI - On the CCD calibration of Zwicky galaxy magnitudes and the properties of nearby field galaxies AB - We present CCD (charge-coupled device) photometry for galaxies around 204 bright (m(Z) < 15.5) Zwicky galaxies in the equatorial extension of the APM Galaxy Survey, sampling an area over 400 deg(2), which extends 6 h in right ascension. We fit a best linear relation between the Zwicky magnitude system, m(Z), and the CCD photometry, B-CCD, by doing a likelihood analysis that corrects for Malmquist bias. This fit yields a mean scale error in Zwicky of 0.38 mag mag(-1): i.e. Delta m(Z) similar or equal to (0.62 +/- 0.05)Delta B-CCD and a mean zero-point of [B-CCD - m(Z)] = -0.35 +/- 0.15 mag. The scatter around this fit is about 0.4 mag, Correcting the Zwicky magnitude system with the best-fitting model results in a 60 per cent lower normalization and 0.35-mag brighter M-* in the luminosity function. This brings the CfA2 luminosity function closer to the other low-redshift estimations (e.g. Stromlo-APM or LCRS). We find a significant positive angular correlation of magnitudes and position in the sky at scales smaller than about 5 arcmin, which corresponds to a mean separation of 120 h(-1) kpc. We also present colours, sizes and ellipticities for galaxies in our fields, which provides a good local reference for the studies of galaxy evolution MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000085823700018 L2 - galaxies : clusters : general;galaxies : evolution;galaxies : fundamental parameters;large-scale structure of Universe;LUMINOSITY FUNCTION; REDSHIFT SURVEY; PHOTOELECTRIC PHOTOMETRY; APM; CATALOG; SCALE SO - Monthly Notices of the Royal Astronomical Society 2000 ;312(2):417-428 777 UI - 13680 AU - Geis A AU - Wibbels T AU - Marquez MR AU - Garduno M AU - Burchfield P AU - Pena J AD - Univ Alabama, Birmingham, AL, USAInst Nacl Pesca, Cancun, Mexico TI - Evaluation of hatchling Kemp's ridley sex ratios using nest incubation temperatures at Rancho Nuevo, Mexico MH - Mexico|Quintana Roo MH - USA PB - LAWRENCE: AMER SOC ZOOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Meeting Abstract AV - English IS - 0003-1569 UR - ISI:000168132000271 SO - American Zoologist 2000 ;40(6):1026-1027 778 UI - 15579 AU - Gelover-Santiago AL AU - Lima R AU - Martinez-Mekler G AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoCNRS, Ctr Phys Theor, F-13288 Marseille 9, FranceUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoGelover-Santiago, AL, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Synchronization and cluster periodic solutions in globally coupled maps AB - The purpose of this work is to investigate mechanisms by which synchronization takes place in networks of elements with global couplings. We consider a family of globally coupled nonlinear maps and find, for each model, sufficient conditions for synchronization. We also analyze bifurcations of syncrhonized dynamics to other homogeneous and cluster periodic solutions in terms of corresponding low-dimensional maps. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000088349200022 L2 - synchronization;globally coupled maps SO - Physica A 2000 ;283(1-2):131-135 779 UI - 16162 AU - Gelover-Santiago AL AU - Lima R AU - Martinez-Mekler G AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoCNRS, Ctr Phys Theor Marseille, F-13288 Marseille 9, FranceUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoGelover-Santiago, AL, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Synchronization in globally coupled maps AB - In this work we study synchronization in a network of nonlinear elements with global couplings. We consider a family of maps and for each model we find sufficient conditions for synchronization. We also study cluster solutions and the corresponding low-dimensional maps MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000086571000012 L2 - CHAOTIC SYSTEMS; OSCILLATORS SO - International Journal of Bifurcation and Chaos 2000 ;10(2):453-460 780 UI - 15809 AU - Geppert U AU - Page D AU - Zannias T AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Circuito Invest Cient, Mexico City 04510, DF, MexicoUniv Michoacana, SNH, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoGeppert, U, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - Magnetic field decay in neutron stars: Analysis of general relativistic effects AB - An analysis of the role of general relativistic effects on the decay of a neutron star's magnetic field is presented. At first, a generalized induction equation on an arbitrary static background geometry has been derived and, secondly, by a combination of analytical and numerical techniques, a comparison of the time scales for the decay of an initial dipole magnetic field in flat and curved spacetime is discussed. For the case of very simple neutron star models, rotation is not accounted for and, in the absence of cooling effects, we find that the inclusion of general relativistic effects result, on the average, in an enlargement of the decay time of the field in comparison to the flat spacetime case. Via numerical techniques, we show that the enlargement factor depends upon the dimensionless compactness ratio epsilon = 2GM/c(2)R, and for epsilon in the range 0.3-0.5, corresponding to the compactness ratio of realistic neutron star models, this factor is between 1.2 and 1.3. The present analysis shows that general relativistic effects on magnetic field decay ought to be examined more carefully than hitherto. A brief discussion of our findings on the impact of neutron star physics is also presented MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000087678100007 L2 - SPACETIME SO - Physical Review D 2000 ;6112(12): 781 UI - 15804 AU - Gervids VI AU - Morozov DK AD - Tech Univ, Moscow Engn Phys Inst, Moscow 115409, RussiaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoRussian Res Ctr, Inst Nucl Fus, Kurchatov Inst, Moscow 123182, RussiaGervids, VI, Tech Univ, Moscow Engn Phys Inst, Kashirskoe Sh 31, Moscow 115409, Russia TI - The two and three most representative ionization state approximations for impurity description in coronal plasmas AB - Based on the analytical study of the solutions to the coronal balance equations, as well as on the numerical results, it is shown that, in many cases of practical interest, it is possible to describe the impurity ionization state with acceptable accuracy by only the two or three most representative ionization states. Reduced models for light impurities and strongly ionized heavy impurities in coronal hydrogen plasmas are proposed. The models make it possible to obtain analytical results for many cases as well as to significantly reduce computation time. In these approximations, simple equations determining the dynamics of impurity distributions over ionization states are derived. (C) 2000 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - WOODBURY: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1063-780X UR - ISI:000087636400010 L2 - INSTABILITIES; DYNAMICS; WAVES SO - Plasma Physics Reports 2000 ;26(5):439-445 782 UI - 15022 AU - Ghosh PK AU - Gupta S AU - Ortiz-Ortiz L AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoGhosh, PK, Kothari Med Ctr & Res Inst, Dept Immunol, 8-3 Alipore Rd, Calcutta 700027, W Bengal, India TI - Intestinal amoebiasis: Delayed-type hypersensitivity response in mice AB - Delayed-type hypersensitive (DTH) response was evaluated in C3H/HeJ mice intestinally infected with Entamoeba histolytica. Infected and non-infected control mice were challenged with amoebic antigen on day 5, 10, 15, 20, 25, 30, 40, 50, and 60 post-infection. Maximum footpad swelling was observed after 24 hours of the challenge. The E. histolytica-infected mice exhibited a DTH response on day 5, 15, 20, 25, 40, and 60 post-infection. However, on day Ill, 30, and 50, such response was similar to that of the non-infected control mice. The mice developed an evident DTH response late in the course of infection (25 days post-infection). The infected mice did not show any alteration to their DTH response against heterologous unrelated antigen (sheep red blood cells), suggesting that cellular anergy was antigen-specific MH - India MH - Mexico|Distrito Federal PB - DHAKA: I C D D R B-CENTRE HEALTH POPULATION RESEARCH RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1606-0997 UR - ISI:000090048000008 L2 - Entamoeba histolytica;amoebiasis;disease models;animal;ENTAMOEBA-HISTOLYTICA; AMEBIASIS; HAMSTERS SO - Journal of Health Population and Nutrition 2000 ;18(2):109-114 783 UI - 15116 AU - Ghosh S AU - Frisardi M AU - Ramirez-Avila L AU - Descoteaux S AU - Sturm-Ramirez K AU - Newton-Sanchez OA AU - Santos-Preciado JI AU - Ganguly C AU - Lohia A AU - Reed S AU - Samuelson J AD - Harvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USAHosp Infantil, Div Infect Dis, Mexico City, DF, MexicoBose Inst, Dept Biochem, Calcutta 700009, W Bengal, IndiaUniv Calif San Diego, Med Ctr, Dept Pathol & Med, San Diego, CA 92103, USASamuelson, J, Harvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, 665 Huntington Ave, Boston, MA 02115 USA TI - Molecular epidemiology of Entamoeba spp.: Evidence of a bottleneck (Demographic sweep) and transcontinental spread of diploid parasites AB - Entamoeba histolytica causes amebic colitis and liver abscess in developing countries such as Mexico and India. Entamoeba dispar is morphologically identical but is not associated with disease. Here we determined the ploidy of E. histolytica and developed PCR-based methods for distinguishing field isolates off. histolytica or E. dispar. Fluorescence in situ hybridization showed that E. histolytica trophozoites are diploid for five "single- copy" probes tested. Intergenic sequences between superoxide dismutase and actin 3 genes of clinical isolates of E. histolytica from the New and Old Worlds were identical, as were those off. dispar. These results suggest a bottleneck or demographic sweep in entamoebae which infect humans. In contrast, E. histolytica and E. dispar genes encoding repeat antigens on the surface of trophozoites (Ser-rich protein) or encysting parasites (chitinase) were highly polymorphic. chitinase alleles suggested that the early axenized strains of E. histolytica, HM-1 from Mexico City, Mexico, and NIH-200 from Calcutta, India, are still present and that similar E. dispar parasites can be identified in both the New and Old Worlds. Ser-rich protein alleles, which suggested the presence of the HM-1 strain in Mexico City, included some E. histolytica genes that predicted Ser-rich proteins with very few repeats. These results, which suggest diversifying selection at chitinase and Ser-r ich protein loci, demonstrate the usefulness of these alleles for distinguishing clinical isolates of E. histolytica and E. dispar MH - India MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 31 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000089707600051 L2 - PLASMODIUM-FALCIPARUM; ANTIGENIC DIVERSITY; HISTOLYTICA; DISPAR; AMEBIASIS; RNA; DNA; DIFFERENTIATION; IDENTIFICATION; CLONING SO - Journal of Clinical Microbiology 2000 ;38(10):3815-3821 784 UI - 15985 AU - Giardina CP AU - Sanford RL AU - Dockersmith IC AU - Jaramillo VJ AD - Univ Denver, Dept Biol Sci, Denver, CO 80208, USAUniv Nacl Autonoma Mexico, Inst Ecol, Morelia 58089, Michoacan, MexicoGiardina, CP, Univ Hawaii, Beaumont Res Ctr, Dept Agron & Soil Sci, 461 Lanikaula St, Hilo, HI 96720 USA TI - The effects of slash burning on ecosystem nutrients during the land preparation phase of shifting cultivation AB - The most commonly observed change in soil following slash-and-burn clearing of tropical forest is a short-term increase in nutrient availability. Studies of shifting cultivation commonly cite the incorporation of nutrient-rich ash from consumed aboveground biomass into soil as the reason for this change. The effects of soil heating on nutrient availability have been examined only rarely in field studies of slash-and-burn, and soil heating as a mechanism of nutrient release is most often assumed to be of minor importance in the field. Few budgets for above and belowground nutrient flux have been developed in the tropics, and a survey of results from field and laboratory studies indicates that soils are sufficiently heated during most slash-and-burn events, particularly in dry and monsoonal climates, to cause significant, even substantial release of nutrients from non-plant-available into plant-available forms in soil. Conversely, large aboveground losses of nutrients during and after burning often result in low quantities of nutrients that are released to soil. Assessing the biophysical sustainability of an agricultural practice requires detailed information about nutrient flux and loss incurred during management. To this end, current conceptual models of shifting cultivation should be revised to more accurately describe these fluxes and losses MH - USA MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 27 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000087070300022 L2 - cations;fire;nitrogen;nutrients;phosphorus;slash-and-burn;soil;tropical forests;DRY TROPICAL FOREST; SOIL-PHOSPHORUS AVAILABILITY; MICROBIAL BIOMASS; NITROGEN TRANSFORMATIONS; ORGANIC-MATTER; CHEMICAL-PROPERTIES; ASH-FERTILIZATION; EASTERN AMAZONIA; VEGETATION FIRES; EUCALYPT FOREST SO - Plant and Soil 2000 ;220(1-2):247-260 785 UI - 15420 AU - Giovanardi C AU - Rodriguez LF AU - Lizano S AU - Canto J AD - Osservatorio Astrofis Arcetri, I-50125 Florence, ItalyNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoGiovanardi, C, Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy TI - Very large array observations of high-velocity HI in L1551 AB - We report Very Large Array (VLA) observations of the 21 cm continuum and H I line emission of the neutral wind in the prototypical molecular outflow source L1551. The intermediate-velocity gas observed with the VLA has a velocity with respect to the ambient cloud in the range 10-50 km s(-1). Although the blueshifted flow appears weaker than the red one, the maps are indicative of a bipolar morphology confined inside the large-scale CO bipolar lobes. This morphology strongly suggests that the atomic wind is driving the bipolar CO outflow. We fit to the H I line profiles, at four different positions along the redshifted flow axis, a model of a decelerating conical wind that entrains ambient cloud material in a mixing layer at the walls of the cone. This model has a velocity at the axis v(0) = 200 km s(-1), a mass-loss rate (M) over dot (*) similar or equal to 9 x 10(-7) M. yr(-1), and a momentum rate (P) over dot similar or equal to 2 x 10(-4) M. yr(-1) km s(-1). This is sufficient to drive the observed molecular flow, provided an age greater than or equal to 8 x 10(4) yr. We find that the continuum emission spectrum of IRS 5, on scales of 10 ", is similar to those of H II regions. This can be explained if most of the emission comes from material ionized by UV radiation from shock fronts due to the interaction of the stellar wind against the ambient cloud. The momentum rate required to produce the extended centimeter emission agrees well with the wind P obtained by fitting the line profiles. Finally, the location of a background extragalactic continuum source in the red lobe allows us to probe the physical conditions of the neutral wind. We find that the most probable H I spin temperature in the wind is in the range 25-50 K, in agreement with predictions of the thermal structure of such winds MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000088824800027 L2 - ISM : individual (L1551);ISM : jets and outflows;radio lines : ISM;stars : mass loss;stars : pre-main-sequence;RADIO-CONTINUUM EMISSION; HERBIG-HARO OBJECTS; YOUNG STELLAR OBJECTS; HL TAURI REGION; MOLECULAR OUTFLOWS; VLA OBSERVATIONS; BIPOLAR OUTFLOWS; NEUTRAL WINDS; BINARY-SYSTEM; DARK-CLOUD SO - Astrophysical Journal 2000 ;538(2):728-737 786 UI - 14659 AU - Girart JM AU - Rodriguez LF AU - Curiel S AD - Univ Illinois, Dept Astron, Urbana, IL 61801, USAUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoGirart, JM, Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA TI - A subarcsecond binary radio source associated with the X-ray-emitting young stellar object YLW 15 AB - YLW 15 is a remarkable object since it exhibits phenomena, such as strong millimeter emission and association with a bipolar outflow, that characterize extremely young stars (class 0 or I objects) while at the same time presenting strong, time-variable X-ray emission that is ubiquitous and detected characteristically in more evolved objects. Our Very Large Array observations reveal that YLW 15 is a subarcsecond (0."6) radio binary, with one of the components spatially extended and the other unresolved. We discuss the possibility that the components of the binary system may have different characteristics also at other wavelengths, possibly as a result of different evolutionary status, and discuss future observations that may test this hypothesis MH - USA MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000165931300017 L2 - ISM : individual (YLW 15);ISM : jets and outflows;stars : formation;X-rays : ISM;OPHIUCHI DARK CLOUD; T-TAURI STARS; RHO-OPHIUCHI; IRAS OBSERVATIONS; PROTOSTARS; EMISSION; CLUSTER; DISK; OUTFLOWS; FLARES SO - Astrophysical Journal 2000 ;544(2):L153-L156 787 UI - 15610 AU - Giray T AU - Guzman-Novoa E AU - Aron CW AU - Zelinsky B AU - Fahrbach SE AU - Robinson GE AD - Univ Vermont, Dept Biol, Burlington, VT 05405, USAUniv Illinois, Dept Entomol, Urbana, IL 61801, USASARH, INIFAP, CENIFMA, Queretaro 76030, Qro, MexicoGiray, T, Univ Vermont, Dept Biol, Burlington, VT 05405, USA TI - Genetic variation in worker temporal polyethism and colony defensiveness in the honey bee, Apis mellifera AB - To test the hypothesis that colonies of honey bees composed of workers with faster rates of adult behavioral development are more defensive than colonies composed of workers with slower behavioral development, we determined whether there is a correlation between genetic variation in worker temporal polyethism and colony defensiveness. There was a positive correlation for these two traits, both for European and Africanized honey bees. The correlation was larger for Africanized bees, due to differences between Africanized and European bees, differences in experimental design, or both. Consistent with these results was the finding that colonies with a higher proportion of older bees were more defensive than colonies of the same size that had a lower proportion of older bees. There also was a positive correlation between rate of individual behavioral development and the intensity of colony flight activity, and a negative correlation between colony defensiveness and flight activity. This suggests that the relationship between temporal polyethism and colony defensiveness may vary with the manner in which foraging and defense duties are allocated among a colony's older workers. These results indicate that genotypic differences in rates of worker behavioral development can influence the phenotype of a honey bee colony in a variety of ways MH - Mexico|Queretaro MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 25 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 1045-2249 UR - ISI:000088355900007 L2 - Apis mellifera;behavioral development;defense;foraging;honey bees;life history;DIVISION-OF-LABOR; ALARM PHEROMONE PERCEPTION; TASK SPECIALIZATION; BEHAVIORAL-DEVELOPMENT; GENOTYPIC VARIABILITY; STINGING BEHAVIOR; FORAGING BEHAVIOR; JUVENILE-HORMONE; AGE POLYETHISM; POLYGYNOUS ANT SO - Behavioral Ecology 2000 ;11(1):44-55 788 UI - 15335 AU - Gnecco D AU - Orea L AU - Galindo A AU - Enriquez RG AU - Toscano RA AU - Reynolds WF AD - BUAP, Ctr Quim Inst Ciencias, Puebla 72000, MexicoNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Toronto, Dept Chem, Toronto, ON M5S BHG, CanadaGnecco, D, BUAP, Ctr Quim Inst Ciencias, Puebla 72000, Mexico TI - Regiospecific and enantiospecific ring opening of methyl (+)-(1 ' R,2R)- and (-)-(1 ' R,2S)-1-(2-phenylethanol) aziridine-2-carboxylates AB - The acid-catalyzed ring-opening of methyl (+)-(1'R, 2R) and (-)-(1'R, 2S)-1-(2-phenylethanol) aziridine-2-carboxylates (1) and (2) lead quantitatively to the corresponding 2(S)-(-)-chloro-3-[2'-hydroxy-1'(R)-phenyl-ethylamino] propionic acid methyl ester (3) and 2(R)-(-)-chloro-3-[2'-hydroxy-1'(R)-phenyl-ethylamino] propionic acid methyl ester (4) hydrochlorides MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - BASEL: MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1420-3049 UR - ISI:000088970900003 L2 - aziridine-ring opening;regiospecificity;enantiospecificity SO - Molecules 2000 ;5(8):998-1003 789 UI - 15919 AU - Godina JJ AU - Meurice Y AU - Oktay MB AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Iowa, Dept Phys & Astron, Iowa City, IA 52242, USAGodina, JJ, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Ap Post 14-740, Mexico City 07000, DF, Mexico TI - Hyperscaling in the broken symmetry phase of Dyson's hierarchical model AB - We use polynomial truncations of the Fourier transform of the local measure to calculate the connected q-point functions of Dyson's hierarchical model in the broken symmetry phase. We show that accurate values of the connected one-, two-, and three-point functions can be obtained at large Volume and in a limited range of constant external field coupled linearly to the field variable. We introduce a new method to obtain the correct infinite volume and zero external field extrapolations. We extract the leading critical exponents and show that they obey the scaling and hyperscaling relations with an accuracy ranging from 10(-5) to 5 x 10(-3). We briefly discuss how to improve the method of calculation MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000087284800059 L2 - HIGH-TEMPERATURE EXPANSION; GROUP FIXED-POINT; RENORMALIZATION-GROUP; EXPONENTS SO - Physical Review D 2000 ;6111(11): 790 UI - 16072 AU - Godina JJ AU - Meurice Y AU - Niermann S AU - Oktay MB AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Iowa, Dept Phys & Astron, Iowa City, IA 52242, USAGodina, JJ, Inst Politecn Nacl, CINVESTAV, Dept Fis, Ap Post 14-740, Mexico City 07000, DF, Mexico TI - Symmetry breaking, duality and fine-tuning in hierarchical spin models AB - We discuss three questions related to the critical behavior of hierarchical spin models: 1) the hyperscaling relations in the broken symmetry phase; 2) the combined use of dual expansions to calculate non-universal quantities; 3) the fine-tuning issue in approximately supersymmetric models MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000086729700193 L2 - EXPONENTS SO - Nuclear Physics B-Proceedings Supplements 2000 ;83-4():703-705 791 UI - 14289 AU - Godinez-Dominguez E AU - Rojo-Vazquez J AU - Galvan-Pina V AU - guilar-Palomino B AD - Univ Guadalajara, Ctr Univ Costa Sur, Ctr Ecol Costera, San Patricio Melaque 48980, Jalisco, MexicoGodinez-Dominguez, E, Univ La Coruna, Dept Biol Anim Vegetal & Ecol, Campus Zapateira S-N, La Coruna 15071, Spain TI - Changes in the structure of a coastal fish assemblage exploited by a small scale gillnet fishery during an El Nino-La Nina event AB - During 1998 an experimental gillnet fishing survey was carried out in a Mexican Central Pacific inshore zone. One-hundred and thirty fish species belonging to 51 families and 18 orders were identified. The most abundant species were Microlepidotus brevipinnis (29.0% of the total abundance) and Caranx caninus (19.2%), followed by C. caballus (6.3%), Kyphosus analogus (4.3%) and C. sexfasciatus (3.4%). Thermal SST anomalies showed the existence of two periods. The first, from January to April with positive anomalies, defines the end of an El Nino episode. The second period, from May to December, constitutes the beginning of the La Nina episode. The typical seasonality in a non-anomalous year continued for a large percentage of the inshore fish community, and the effects of the anomalous event consisted of changes in seasonality of occurrence in some individual species and the unusual abundance of some uncommon species. The species richness was higher during the El Nine-La Nina event than in a non-anomalous year, and therefore the event could be considered an interannual environmental mechanism that favours fish diversity in inshore waters. (C) 2000 Academic Press MH - Mexico|Jalisco MH - Spain PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 11 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000166995500008 L2 - Mexican Central Pacific;inshore fish assemblage;El Nino;ENSO;small scale fisheries;gillnet;SOUTHERN-OSCILLATION EVENTS; BAJA-CALIFORNIA-SUR; LARVAL ANCHOVY; WATERS; DIVERSITY; COMMUNITIES; MEXICO; TAIWAN; BAY; CARPENTARIA SO - Estuarine Coastal and Shelf Science 2000 ;51(6):773-787 792 UI - 14466 AU - Goguitchaichvili A AU - Calvo M AU - Sologashvili D AU - Alva L AU - Urrutia L AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Burgos, EPS, Dept Fis, Burgos 09006, SpainTbilisi State Univ, Dept Geophys, GE-380064 Tbilisi, Rep of GeorgiaGoguitchaichvili, A, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Palaeomagnetism of Georgian Plio-Quaternary volcanic provinces (Southern Caucasus): a pilot study AB - A preliminary palaeomagnetic and rock magnetic study was carried out on 248 Plio-Quaternary lava flows and three interbedded lacustrine sedimentary layers from Georgia (Caucasus). Most samples are characterised by a single palaeomagnetic component, carried by magnetite, as confirmed by susceptibility-temperature curves. Normal, reversed and in a few cases intermediate polarities were recognised. A palaeomagnetic mean direction of D = 6.0 degrees, I = 57.8 degrees, k = 30, alpha (95) = 3.8 degrees was obtained. Considering the three sampled volcanic provinces separately, differences with the expected palaeodeclination are non-significative (Kazbeki and Khzami) or small (Djavakheti). A mean palaeointensity value of 41.5 +/- 11.3 muT, corresponding to a mean VDM of 7.8 +/- 3.7.10(22) A.m(2) is obtained. (C) 2000 Academic des sciences/Editions scientifiques et medicales Elsevier SAS MH - Mexico|Distrito Federal MH - Rep of Georgia MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1251-8050 UR - ISI:000166559900001 L2 - palaeomagnetism;palaeointensity;Pliocene;Quaternary;Southern Caucasus;LESSER CAUCASUS; FIELD SO - Comptes Rendus de l Academie des Sciences Serie Ii Fascicule A-Sciences de la Terre et des Planetes 2000 ;331(11):683-690 793 UI - 15091 AU - Goguitchaichvili A AU - Pares JM AD - Univ Nacl Autonoma Mexico, Inst Geofis, Dept Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, MexicoUniv Michigan, Dept Geol Sci, Ann Arbor, MI 48109, USAGoguitchaichvili, A, Univ Nacl Autonoma Mexico, Inst Geofis, Dept Paleomagnetismo & Geofis Nucl, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A recognition palaeomagnetic study of volcanic and sedimentary rocks from Dmanissi (Caucasus): implications for the oldest human occupation in Europe AB - We report the initial results of a palaeomagnetic study from Dmanissi (Georgia), which has yielded a human mandible and evidence of a lithic industry associated with a Late Pliocene-Early Pleistocene fauna. A preliminary combined palaeomagnetic-Ar/Ar study suggested an Olduvain age for the anthropological level, thus, becoming the oldest sign of human occupation in Europe. Our palaeomagnetic and rock-magnetic study reveals the presence of reverse magnetizations in the sediments that host the human remains and artifacts, thereby ruling out an Olduvain age for the site. An underlying basaltic lava shows intermediate polarities that, given the isotopic age of the rock (similar to 1.8 Ma), can be interpreted as the Matuyama-Olduvain transition. (C) 2000 Academie des sciences/Editions scientifiques et medicales Elsevier SAS MH - Mexico|Distrito Federal MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1251-8050 UR - ISI:000089778800003 L2 - palaeomagnetism;anthropology;Caucasus;ATAPUERCA; HOMINID; SPAIN; GEORGIA; TD6; AGE SO - Comptes Rendus de l Academie des Sciences Serie Ii Fascicule A-Sciences de la Terre et des Planetes 2000 ;331(3):183-186 794 UI - 16531 AU - Goguitchaichvili A AU - Prevot M AD - Univ Montpellier 2, CNRS, UMR 5573, Lab Geophys & Tecton, F-34095 Montpellier, FranceGoguitchaichvili, A, Univ Nacl Autonoma Mexico, Lab Paleomagnetismo, Inst Geofis, Mexico City, DF, Mexico TI - Magnetism of oriented single crystals of hemoilmenite with self-reversed thermoremanent magnetization AB - Ten large, single crystals of hemoilmenite (gamma FeTiO3(1-y)Fe2O3) with y close to 0.54 were extracted from the self-reversed Pinatubo dacitic pumice erupted in 1991 and oriented with respect to the c axis of the hexagonal structure by means of an X-ray diffractometer. Hysteresis measurements show that c is the hardest magnetization axis while the softest axes lie in the basal plane. The hysteresis curves observed at room temperature in this plane suggest that in addition to the multidomain (MD) regions commonly seen under the microscope using the Bitter technique, there are also crystal regions which behave like single-domain (SD) or pseudosingle-domain (PSD) particles. As could be expected from the hysteresis measurements, the directions of natural remanent-magnetization (NRM), saturation isothermal remanent magnetization (SIRM), and thermoremanent magnetization (TRM) all lie in the basal plane, regardless of the direction of the applied field. Thus the antiferromagnetically coupled spills of hemoilmenite of intermediate composition lie in the basal plane. The partial TRMs (pTRMs) are approximately reversed; that is, their direction is always more than 90 degrees away from the applied field direction-and most often close to 180 degrees, In fact, pTRM directions are discretely distributed along three directions in the basal plane which:are 60 degrees away from each other. This distribution indicates that the magnetic anisotropy is of magnetocrystalline origin. Both NRM and TRM are exceptionally resistant to alternating field (AF) with no decrease in remanence intensity up to 3 mT at least. This behavior, together with the fact that the Lowrie Fuller test is SD-type, indicates that natural and laboratory TRMs are carried by non-interacting single-domain regions. We propose a self-reversal model based on negative exchange interactions in which the self-reversed TRM is carried by Cation-ordered (ferrimagnetic) SD-like regions dispersed within a cation-disordered (antiferromagnetic with weak ferromagnetism) MD matrix carrying a: weak, normal TRM MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 16 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000085208800005 L2 - ALTERNATING-FIELD DEMAGNETIZATION; IRON-TITANIUM OXIDES; ILMENITE-HEMATITE; REMANENT MAGNETIZATION; MULTIDOMAIN GRAINS; DACITIC PUMICE; ORDER-DISORDER; TEMPERATURE; PINATUBO; ERUPTION SO - Journal of Geophysical Research-Solid Earth 2000 ;105(B2):2761-2780 795 UI - 16060 AU - Goitia ARBY AU - Starodumov AN AU - Monzon-Hernandez D AU - Filippov VN AU - Gavrilovic P AD - Ctr Invest Opt, Leon 37150, Gto, MexicoPolaroid Corp, Div Res, Cambridge, MA 02139, USAGoitia, ARBY, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - Birefringence measurement in double-clad fiber lasers with large cross section AB - We report on birefringence measurements in double-clad fibers with large cross section, doped with neodymium and ytterbium. The experimental results for rectangular double-clad fibers are compared with those for single-clad circular neodymium-doped fibers, taking into account existing models of stress-and geometry-induced birefringence. We demonstrated that the ellipticity of an outer silica cladding has no effect on birefringence in large-area double-clad fibers. The stress-induced birefringence is shown to depend on the ratio between the diameter of an internal silica support and the linear dimensions of the rectangular outer cladding. The stress-distribution pattern is derived to prove the experimental results. (C) 2000 Optical Society of America. OCIS codes: 060.2300, 060.2400 MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000086939900001 L2 - OPTICAL FIBERS; MODE FIBER; POLARIZATION; DYNAMICS SO - Applied Optics 2000 ;39(14):2259-2263 796 UI - 14712 AU - Gomez-Flores R AU - Calderon CL AU - Scheibel LW AU - Tamez-Guerra P AU - Rodriguez-Padilla C AU - Tamez-Guerra R AU - Weber RJ AD - Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Sect Med Sci, Peoria, IL 61656, USAUniv Illinois, Coll Med, Dept Biomed & Therapeut Sci, Clin Pharmacol Sect, Peoria, IL 61656, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, San Nicolas De Los Garza, NL, MexicoGomez-Flores, R, Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Sect Med Sci, 1 Illini Dr, Peoria, IL 61656 USA TI - Immunoenhancing properties of Plantago major leaf extract AB - Plantago major (PM), also known as plantain, is a weed found in temperate zones worldwide. PM leaves have been associated with various biological properties ranging from antiinflammatory, antimicrobial and antitumour to wound heating. However, its mechanism of action associated with boosting of the immune function remains to be elucidated. We found that endotoxin-free methanol extracts from PM leaves, at doses of 50, 100, 250, and 500 mug/mL, were associated with 4.4 +/- 1, 6 +/- 1, 12 +/- 0.4, and 18 +/- 0.4-fold increases of nitric oxide (NO) production, and increased TNF-alpha production (621 +/- 31, 721 +/- 36, 727 +/- 36, and 1056 +/- 52 U/mL, respectively) by rat peritoneal macrophages, in the absence of IFN-gamma or LPS. NO and TNF-alpha production by untreated macrophages was negligible, In addition, PM extracts potentiated Con A-induced lymphoproliferation (3- to 12-fold increases) in a dose-dependent fashion, compared with the effect of ConA alone. The regulation of immune parameters induced by plant extracts may be clinically relevant in numerous diseases including chronic viral infections, tuberculosis, AIDS and cancer. Copyright (C) 2000 John Wiley & Sons, Ltd MH - USA MH - Mexico|Nuevo Leon PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0951-418X UR - ISI:000165812100008 L2 - Plantago;leaf extract;macrophage;T cell;immunopotentiation;cell activation;MURINE PERITONEAL-MACROPHAGES; NITRIC-OXIDE; MEDICINAL-PLANTS; IFN-GAMMA; TNF-ALPHA; ACTIVATION; PHARMACOLOGY; ENHANCEMENT; COMPLEX; GROWTH SO - Phytotherapy Research 2000 ;14(8):617-622 797 UI - 15782 AU - Gomez-Flores R AU - Calderon CL AU - Scheibel LW AU - Tamez-Guerra P AU - Rodriguez-Padilla C AU - Tamez-Guerra R AU - Weber RJ AD - Univ Illinois, Coll Med, Sect Med Sci, Peoria, IL 61636, USAUniv Illinois, Coll Med, Clin Pharmacol Sect, Dept Biomed & Therapeut Sci, Peoria, IL 61636, USAUniv Autonoma Nuevo Leon, Dept Microbiol & Immunol, Fac Ciencias Biol, San Nicolas De Los Garza, NL, Mexico TI - Immunoenhancing properties of Plantago major leaf extract MH - Mexico|Nuevo Leon MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000086643101308 SO - Faseb Journal 2000 ;14(6):A1134-A1134 798 UI - 15136 AU - Gomez-Gil B AU - Roque A AU - Turnbull JF AD - CIAD, Mazatlan Unit Aquaculture & Environm Management, Mazatlan 82000, Sinaloa, MexicoUniv Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandGomez-Gil, B, CIAD, Mazatlan Unit Aquaculture & Environm Management, AP 711, Mazatlan 82000, Sinaloa, Mexico TI - The use and selection of probiotic bacteria for use in the culture of larval aquatic organisms AB - Research in probiotics for aquaculture is at an early stage of development and much work is still needed. The principal bacterial groups tested as probionts in the culture of shrimp, crab, oyster and fish have been Vibrio, Pseudomonas, Bacillus, and several lactobacilli. The available information is inconclusive, since few experiments with sufficiently robust design have been conducted to permit critical evaluation. Experiments have mainly been conducted with fish larvae, where significant reductions in mortality have been obtained. Most of the work reviewed in this article describes commercial hatchery experiments rather than rigorous laboratory investigations and the focus is principally shrimp larviculture. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Sinaloa MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 53 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000089649300019 L2 - probiotics;larviculture;bacteria;SCALLOP ARGOPECTEN-PURPURATUS; CRASSOSTREA-GIGAS THUNBERG; LACTIC-ACID BACTERIA; COD GADUS-MORHUA; SCOPHTHALMUS-MAXIMUS; VIBRIO-ANGUILLARUM; PORTUNUS-TRITUBERCULATUS; AEROMONAS-SALMONICIDA; BRACHIONUS-PLICATILIS; PACIFIC OYSTER SO - Aquaculture 2000 ;191(1-3):259-270 799 UI - 14500 AU - Gomez-Gutierrez J AU - Dominguez-Hernandez E AU - Robinson CJ AU - Arenas V AD - Ctr Interdisciplinairo Ciencias Marinas, Dept Plancton & Ecol Marina, La Paz 23000, Baja California, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Lab Ecol Pesquerias, Mexico City 04510, DF, MexicoGomez-Gutierrez, J, Oregon State Univ, Coll Ocean & Atmospher Sci, 104 Oceanog Adm Bldg, Corvallis, OR 97331 USA TI - Hydroacoustical evidence of autumn inshore residence of the pelagic red crab Pleuroncodes planipes at Punta Eugenia, Baja California, Mexico AB - A previously published conceptual model of the Life history of the red crab Pleuroncodes planipes (Galatheidae) (Stimpson, 1860) reports that the center of distribution of this micronektonic crustacean is located at Bahia Magdalena, on the southwest coast of Baja California (25 to 24 degrees 20'N). During spring, the highest abundance of mature females is found nearshore with abundance peaks of larval stages during February and March. Larval drift offshore is associated with a strong Ekman transport system, and the virtual disappearance of the adult pelagic and benthic population from the neritic region at Bahia Magdalena in late summer and autumn can be explained by an inshore-offshore migration. However, huge benthic-pelagic concentrations of this crustacean occur nearshore during autumn at Punta Eugenia (27 to 29 degrees N). Circadian cycles of the spatial distribution of these aggregations were recorded with a single beam echosounder Simrad EY-200 (200 kHz) along Baja California during October 1994, March, June, and October 1995, and March and June 1996. Data obtained from Isaacs-Kidd midwater net trawls during October 1994 along Baja California were used to identify the red crab aggregations using hydroacoustics. The target strength of the red crab ranged between -50 and -54 dB. The largest aggregations were found in Bah's Magdalena during summer (June 1995 and 1996; 24 to 25 degrees N) and nearshore at Punts Eugenia (27 to 28 degrees N) during autumn and spring (March 1995 and 1996, October 1994 and 1995). These observations suggest that the conceptual model of inshore-offshore adult population migration is valid for Bahia Magdalena, but apparently not for Punts Eugenia at least during autumn. At Punta Eugenia an abrupt change in the orientation of the shoreline enhances upwelling events and promotes semipermanent eddies, thus supporting the inshore residence of this adaptive omnivorous-detritivorous crustacean MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000166447900023 L2 - hydroacoustic;Pleuroncodes planipes;inshore-offshore distribution;Baja California;NYCTIPHANES-SIMPLEX; PACIFIC COAST; GALATHEIDAE; ANOMURA; SUR; VARIABILITY; POPULATION; TRANSITION; CRUSTACEA; MOVEMENTS SO - Marine Ecology-Progress Series 2000 ;208():283-291 800 UI - 16567 AU - Gomez-Lagunas F AU - Ramirez-Dominguez ME AU - Gurrola G AU - Possani LD AU - Kallen RG AD - UNAM, Fac Med, Mexico City, DF, MexicoUNAM, Inst Biotecnol, Mexico City, DF, MexicoUniv Penn, Sch Med, Philadelphia, PA 19104, USA TI - On the mechanism of action of the scorpion toxin Cn2 on rSkm1 Na+ channels MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779300508 SO - Biophysical Journal 2000 ;78(1):87A-87A 801 UI - 15424 AU - Gomez J AU - Mendez R AU - Lema UM AD - Univ Autonoma Metropolitana Iztapalapa, DCBS, Dept Biotecnol, Mexico City 09340, DF, MexicoUniv Santiago Compostela, Dept Ingn Quim, Inst Invest Tecnol, E-15706 Santiago, SpainGomez, J, Univ Autonoma Metropolitana Iztapalapa, DCBS, Dept Biotecnol, Mexico City 09340, DF, Mexico TI - Kinetic study of addition of volatile organic compounds to a nitrifying sludge AB - The effects of different concentrations of several volatile organic compounds (VOC) such as ethanol, acetate, propionate, and butyrate ranging from 0 to 2000 mg/L as well as a mixture of volatile fatty acids (MVFA) at a 4:1:1 (acetate:propionate:butyrate) ratio on the nitrification rate in batch cultures were studied. The results showed that ethanol and acetate were consumed in a mixotrophic way by the nitrifying sludge. At a concentration of 500 mg/L, the nitrification rate of inhibition was different for each compound in which propionate and butyrate were the most inhibitory. At 2000 mg/L the inhibition was 80% with ethanol and 100% with acetate, propionate, and butyrate. With similar concentrations of MVFA, the inhibition was also similar to that in acetate. The effect of the addition of pulses of MVFA at a ratio of 4:1:1 during 14 h on the performance of the continuous nitrifying process with a hydraulic retention time of 3 d was also studied. No inhibition of the nitrification process was observed with pulses of 750-3000 mg of MVFA/L in the input of the reactor. The results in batch cultures suggest that the different degrees of inhibition of the nitrification process were related to the type of organic matter added. The noninhibitory effect of the organic matter in the continuous cultures on the nitrification efficiency of the nitrifying sludge might be related to the feeding pattern MH - Mexico|Distrito Federal MH - Spain PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0273-2289 UR - ISI:000088847200004 L2 - nitrification;inhibition rate;ethanol;acetate;propionate;butyrate;SUSPENDED-GROWTH REACTOR; AMMONIA OXIDATION; NITRIFICATION; BACTERIA; NITROSOMONAS; TEMPERATURE; INHIBITION; PH SO - Applied Biochemistry and Biotechnology 2000 ;87(3):189-202 802 UI - 15790 AU - Gomez JF AU - D'Alessio P AD - INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, SpainNatl Autonomous Univ Mexico, Astron Inst, Mexico City 04510, DF, MexicoAmer Museum Nat Hist, Dept Astrophys, New York, NY 10024, USAGomez, JF, INTA, Lab Astrofis Espacial & Fis Fundamental, Apartado Correos 50727, E-28080 Madrid, Spain TI - Resolving molecular line emission from protoplanetary disks: Observational prospects for disks irradiated by infalling envelopes AB - Molecular line observations that could resolve protoplanetary disks of similar to 100 AU both spatially and kinematically would be a useful tool to identify these disks unambiguously and to determine their kinematical and physical characteristics. In this work we model the expected line emission from a protoplanetary disk irradiated by an infalling envelope, addressing the question of its detectability with subarcsecond resolution. We adopt a previously determined disk model structure that gives a continuum spectral energy distribution and a millimeter intensity spatial distribution that are consistent with observational constraints of HL Tau. An analysis of the capability of presently working and projected interferometers at millimeter and submillimeter wavelengths shows that molecular transitions of moderate opacity at these wavelengths (e.g., (CO)-O-17 lines) are good candidates for detecting disk lines at subarcsecond resolution in the near future. We suggest that, in general, disks of typical class I sources will be detectable. Higher line intensities are obtained for lower inclination angles, larger turbulent velocities, and higher temperatures, with less effect from density changes. The resulting maps show several characteristics that can be tested observationally. A clear asymmetry in the line intensity, with more intense emission in the disk area farther away from the observer, can be used to compare the geometrical relationship between disks and outflows. A decrease in intensity towards the center of the disk is also evident. Finally, the emission peaks in position velocity diagrams trace midplane Keplerian velocities MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087789500038 L2 - accretion, accretion disks;circumstellar matter;molecular processes;planetary systems;stars : formation;stars : pre-main-sequence;T-TAURI STARS; HL-TAURI; ACCRETION DISKS; CIRCUMSTELLAR DISKS; ORION NEBULA; YOUNG STARS; CLOUD CORES; FU-ORIONIS; COLLAPSE; OBJECTS SO - Astrophysical Journal 2000 ;535(2):943-958 803 UI - 15080 AU - Gomez JL AU - Garcia-Ayllon MS AU - Campoy FJ AU - Vidal CJ AD - Univ Murcia, Dept Bioquim & Biol Mol A, E-30071 Murcia, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Unidad Iztapalapa, Mexico City 09340, DF, MexicoVidal, CJ, Univ Murcia, Dept Bioquim & Biol Mol A, Edificio Vet,Apdo 4021, E-30071 Murcia, Spain TI - Muscular dystrophy alters the processing of light acetylcholinesterase but not butyrylcholinesterase forms in liver of Lama2(dy) mice AB - In order to know whether the histopathological changes of liver, which accompany muscular dystrophy, affect the synthesis of cholinesterases, the distribution and glycosylation of acetylcholinesteuase (AChE) and butyrylcholinesterase (BuChE) forms in normal (NL) and dystrophic Lama2(dy) mouse liver (DL) were investigated. About half of liver AChE, and 25% of BuChE were released with a saline buffer (fraction S-1), and the rest with a saline-Brij 96 buffer (S-2). Abundant light (G(2)(A) and G(1)(A)) AChE (87%) and BuChE (93%) forms, and a few G(4)(H) and G(4)(A) ChE species were identified in liver. The dystrophic syndrome had no effect on solubilization or composition of ChE forms. Most of the light AChE and BuChE species (>95%) were bound by octyl-Sepharose, while most light AChE forms (80%), but not BuChE isoforms (15%), were retained in phenyl-agarose. About half of the AChE dimers lost their amphiphilic anchor with phosphatidylinositol-specific phospholipase C (PIPLC), and the fraction of PIPLC-resistant species increased in DL. AChE T and R transcripts were detected by reverse transcriptase-polymerase chain reaction (RT-PCR) of liver RNA. ChE components of liver, erythrocyte, and plasma were distinguished by their amphiphilic properties and interaction with lectins. The dystrophic syndrome increased the liver content of the light AChE forms with Lens culinaris agglutinin (LCA) reactivity. The abundance of ChE tetramers in plasma and their small amount in liver suggest that after their assembly in liver they are rapidly secreted, while the tight species remain associated to hepatic membranes. (C) 2000 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 7 U4 - Neurosciences U5 - J;Article AV - English IS - 0360-4012 UR - ISI:000089759200014 L2 - congenital muscular dystrophy;cholinesterase components;lectin binding;hydrophobic chromatography, GPI anchor;MOLECULAR-FORMS; MOUSE MUSCLE; AMPHIPHILIC PROPERTIES; MICROSOMAL-MEMBRANES; HYDROPHILIC FORMS; EPITHELIAL-CELLS; HUMAN MENINGIOMA; RAT INTESTINE; CHOLINESTERASES; EXPRESSION SO - Journal of Neuroscience Research 2000 ;62(1):134-145 804 UI - 15697 AU - Gomez JM AU - Madariaga R AU - Walpersdorf A AU - Chalard E AD - UNAM, Unidad Invest Ciencias Tierra, Queretaro 76230, Qro, MexicoEcole Normale Super, Geol Lab, URA 1316, F-75231 Paris 05, FranceEcole Mines, Ctr Rech Geophys, F-77305 Fontainebleau, FranceGomez, JM, UNAM, Unidad Invest Ciencias Tierra, Apdo Postal 1-742,CP 76001, Queretaro 76230, Qro, Mexico TI - The 1996 earthquakes in Sulawesi, Indonesia AB - We study the rupture process of the 1 January (M-w = 7.9), 16 July (W-w = 6.6), and 22 (M-w, = 7) July 1996 earthquakes in Sulawesi, Indonesia. A teleseismic body waveform inversion of very broadband records shows that these events occurred beneath the accretionary prism. The main shock was due to a well determined fault with a strike of 53 degrees N and a very shallow dip of 7 degrees, From its source-time function duration (30 sec) and the aftershock distribution we estimate a rupture area of 90 X 60 km(2) and an average slip of 1.80 m, The surface displacement computed with our best model fits well the displacement vector at the only available GPS station at Tomini, The tsunami generated by the mainshock had an approximate source radius of 45 km which roughly agrees with the rupture size estimated above, The earthquakes took place in a relay zone between the trench and the Palu-Koro transcurrent fault. They ruptured a shallow dipping thrust fault which corresponds to the subduction interface under the North Sulawesi arm. The slip vectors of all the events have a NNW orientation parallel to the direction of convergence between the North Sulawesi arm and the Celebes Sea. Among the peculiarities of the rupture process, we found that the July 22 aftershock was the only event to have a well defined precursor 1.8 sec before the main P-wave onset MH - France MH - Mexico|Queretaro PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000088170600015 L2 - SOURCE PARAMETERS; TECTONIC EVOLUTION; NORTH ARM; SUBDUCTION; SEA; GPS; CONSTRAINTS; COLLISION SO - Bulletin of the Seismological Society of America 2000 ;90(3):739-751 805 UI - 15771 AU - Gomez L AU - Chayet A AD - Univ Calif San Diego, Shiley Eye Ctr, La Jolla, CA 92093, USACODET Inst, Tijuana, Mexico TI - 6 month LASIK result after removal of intracorneal ring segments MH - Mexico|Baja California MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246704948 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S917-S917 806 UI - 15378 AU - Gomez S AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mazatlan 82040, Sinoloa, MexicoLimburgs Univ Ctr, Dept SBG, Resgrp Zool, B-3610 Diepenbeek, BelgiumGomez, S, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Ap Postal 811, Mazatlan 82040, Sinoloa, Mexico TI - A new genus, a new species, and a new record of the family Darcythompsoniidae Lang, 1936 (Copepoda, Harpacticoida) from the Gulf of California, Mexico AB - A new genus and new species of the family Darcythompsoniidae Lang (1936), and a new record of Darcythompsonia fairliensis (T. Scott, 1899), from a coastal lagoon in the south-eastern Gulf of California (Mexico), are reported and fully described and illustrated. Pabellonia olganoguerae gen. nov., sp.nov. shares features with Darcythompsonia T. Scott, 1906, such as the presence of a dimorphic second endopodal segment of the male second swimming leg, and with Kristensenia Por, 1983, the lack of sexual dimorphism in the caudal rami, anal operculum and urosomites. Thus it is considered closely related to these genera, and to represent a third component of this lineage. Some notes on the biogeography of Darcythompsonia T. Scott, 1906, are also presented. (C) 2000 The Linnean Society of London MH - Belgium MH - Mexico|Sinaloa PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0024-4082 UR - ISI:000088880400004 L2 - Darcythompsoniidae;taxonomy;Mexico;BIOGEOGRAPHY; VICARIANCE; MODEL SO - Zoological Journal of the Linnean Society 2000 ;129(4):515-536 807 UI - 16291 AU - Gomez Y AU - Rodriguez LF AU - Garay G AD - UNAM, Inst Astron, Morelia 58090, Michoacan, MexicoUniv Chile, Dept Astron, Santiago, ChileGomez, Y, UNAM, Inst Astron, JJ Tablada 1006, Morelia 58090, Michoacan, Mexico TI - A cluster of radio sources near GGD 14 AB - We present sensitive Very Large Array (VLA) radio continuum observations at 3.6 cm toward the star-forming region GGD 14 (also known as GGD 12/13/14/15, G213.88-11.84, and AFGL 890). In addition to the previously known cometary H II region, we report the detection of a cluster of six compact radio sources, all with a nearby 2 mu m counterpart. These new sources appear to be ultracompact H II. regions ionized by B2-B3 zero-age main-sequence (ZAMS) stars. The kinematic age of these six compact radio sources, assuming expansion at 10 km s(-1), is less than 25 yr, and we conclude that they must be confined by some mechanism. The sources are so compact that they could be gravitationally bound to the star. One of the new detections, the source VLA 7, is located near the center of the CO molecular out outflow. We suggest that VLA 7 is associated with the powering source of the molecular outflow and that the infrared sources IRS 9M and IRS 9E, between which lies VLA 7, could be the lobes of a bipolar reflection nebula tracing the outflow at small scales MH - Chile MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086201300025 L2 - HII regions;ISM : individual (GGD 12-15);ISM : jets and outflows;radio continuum : stars;H-II REGIONS; HERBIG-HARO OBJECTS; ULTRACOMPACT; CONTINUUM; OUTFLOW; STARS; LIFETIMES; GGD-12-15; AMMONIA; MODELS SO - Astrophysical Journal 2000 ;531(2):861-867 808 UI - 16553 AU - Gonazalez M AU - Dominguez G AU - Bathias C AD - Conservatoire Natl Arts & Metiers, CNAM ITMA, F-75003 Paris, FranceInst Tecnol Celaya, Celaya 38010, Gto, MexicoGonazalez, M, Conservatoire Natl Arts & Metiers, CNAM ITMA, 2 Rue Conte, F-75003 Paris, France TI - Some results from X-ray computed tomography applied to metal matrix composites AB - This study presents computed tomography (CT) results from a medical scanner carried out on metal matrix composite materials obtained by a casting process. In order to test the capabilities of the CT technique to study the flaws in the sample, few precautions have been taken during the manufacturing process, resulting in composite ingots with many flaws (porosity, segregation, etc.). The mold was modified to obtain a concentration of particles at the bottom of the ingot. CT images and scanning electronic microscopy images were taken at the same slice surface and show good agreement in the distribution of particles and porosity. The spatial resolution of the medical scanner (12 pairs of lines/cm) lets us distinguish between, at the mesoscopic scale, heterogeneous distribution of particles and porosity, but not individual flaws MH - France MH - Mexico|Guanajuato PB - W CONSHOHOCKEN: AMER SOC TESTING MATERIALS RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Composites;Polymer Science U5 - J;Article AV - English IS - 0884-6804 UR - ISI:000085162300006 L2 - metal matrix composites;computed tomography;aluminum matrix;nondestructive;medical scanner;characterization SO - Journal of Composites Technology & Research 2000 ;22(1):45-48 809 UI - 16455 AU - Goncalves LL AU - de Haro ML AU - Taguena-Martinez J AU - Stinchcombe RB AD - Univ Fed Ceara, Dept Fis, Fortaleza, Ceara, BrazilUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Oxford, Dept Theoret Phys, Oxford OX1 3NP, EnglandGoncalves, LL, Univ Fed Ceara, Dept Fis, Fortaleza, Ceara, Brazil TI - Nagel scaling, relaxation, and universality in the kinetic Ising model on an alternating isotopic chain AB - The dynamic critical exponent and the frequency and wave-vector dependent susceptibility of the kinetic Ising model on an alternating isotopic chain with Glauber dynamics are examined. The analysis provides a connection between a microscopic model and the Nagel scaling curve originally proposed to describe dielectric susceptibility measurements of several glass-forming liquids. While support is given to the hypothesis relating the Nagel scaling to multiple relaxation processes, it is also found that the scaling function may exhibit plateau regions and does not hold for all temperatures MH - Brazil MH - United Kingdom MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085267100037 L2 - NONUNIVERSAL CRITICAL-DYNAMICS; SUPERCOOLED LIQUIDS; GLASS-TRANSITION SO - Physical Review Letters 2000 ;84(7):1507-1510 810 UI - 15167 AU - Gongora T AU - Jose JV AU - Schaffner S AU - Tiesinga PHE AD - Northeastern Univ, Dept Phys, Boston, MA 02115, USANortheastern Univ, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115, USASalk Inst, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62250, Morelos, MexicoJose, JV, Northeastern Univ, Dept Phys, Boston, MA 02115, USA TI - Quantum and classical solutions for a free particle in wedge billiards AB - We have studied the quantum and classical solutions of a particle constrained to move inside a sector circular billiard with angle theta(w) and its pacman complement with angle 2 pi - theta(w). In these billiards rotational invariance is broken and angular momentum is no longer a conserved quantum number. The 'fractional' angular momentum quantum solutions are given in terms of Bessel functions of fractional order, with indices lambda(p) = p pi/theta(w), p = 1,2,... for the sector and mu(q) = q pi/2 pi - theta(w), q = 1,2... for the pacman. We derive a 'duality' relation between both fractional indices given by lambda(p) = p mu(q)/2 mu(q) - q and mu(q) = q lambda(p)/2 lambda(p) - p. We find that the average of the angular momentum (L) over cap(z) is zero but the average of (L) over tilde(z)(2) has an eigenvalues lambda(p)(2) and mu(q)(2). We also make a connection of some classical solutions to their quantum wave eigenfunction counterparts. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000089551900005 SO - Physics Letters A 2000 ;274(3-4):117-122 811 UI - 15090 AU - Gonsalves KE AU - Li H AU - Perez R AU - Santiago P AU - Jose-Yacaman M AD - Univ Connecticut, Inst Mat Sci, Dept Chem, Storrs, CT 06269, USAUniv Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06269, USAUNAM, Inst Fis, Lab Cernavaca, Cuernavaca 62191, Morelos, MexicoININ, Dept Mat Sci, Toluca, MexicoGonsalves, KE, Univ Connecticut, Inst Mat Sci, Dept Chem, 97 N Eagleville Rd, Storrs, CT 06269 USA TI - Synthesis of nanostructured metals and metal alloys from organometallics AB - Techniques for the fabrication of nanostructured materials are outlined. This review covers the synthesis of nanostructured metals (Fe, Co, Ni) and metal alloys (Fe-Co, Pt-Pd, M50 steel) from corresponding organometallic precursors by various methods such as thermal decomposition, ultrasonic irradiation, chemical vapor deposition, laser pyrolysis, and reduction. (C) 2000 Elsevier Science S.A. All rights reserved MH - USA MH - Mexico|Morelos MH - Mexico|Estado De Mexico PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0010-8545 UR - ISI:000089839800019 L2 - nanostructured materials;organometallics;nanostructured metals;nanostructured metal alloys;sonochemical synthesis;chemical vapor deposition;M50 TYPE STEEL; SONOCHEMICAL SYNTHESIS; MAGNETIC-PROPERTIES; IRON; POWDERS; NANOPARTICLES; PERSPECTIVES; FILMS SO - Coordination Chemistry Reviews 2000 ;206():607-630 812 UI - 15226 AU - Gonzalez-Aguilar GA AU - Wang CY AU - Buta JG AD - USDA ARS, Hort Crops Qual Lab, Beltsville, MD 20705, USACtr Invest Alimentac & Desarrollo AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoButa, JG, USDA ARS, Hort Crops Qual Lab, 10300 Baltimore Ave, Beltsville, MD 20705 USA TI - Maintaining quality of fresh-cut mangoes using antibrowning agents and modified atmosphere packaging AB - Treatments to inhibit browning and decay and prolong shelf life of fresh-cut mangoes were investigated. Combinations of antibrowning agents and modified atmosphere packaging (MAP) resulted in a reduction of browning and deterioration of fresh-cut mangoes stored at 10 degrees C. Combinations of several browning inhibitors were more effective than those applied individually. Among these treatments, solutions containing 4-hexylresorcinol (0.001 M) (HR) plus potassium sorbate (0.05 M) (KS) and HR plus KS plus D-isoascorbic acid (0.5 M) (ER) reduced changes in color (L*, a*, and b*) and microbial growth and did not affect sensory characteristics of fresh-cut mangoes. In general, these treatments did not affect significantly the changes in organic acids and sugar content of slices during the 14 days of storage at 10 degrees C. High humidity created in the in-package atmosphere alleviated tissue dryness and was an important factor in the ability of the antibrowning solutions to prevent browning and decay. It appears that the maintenance of quality of fresh-cut mangoes is more related to particular combinations of the antibrowning agents used rather than the modified atmosphere created inside the package. HR + ER + KS treatment; in combination with MAP could be used to inhibit browning, decay, and deterioration of fresh-cut mangoes MH - USA MH - Mexico|Sonora PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000089390800072 L2 - d-isoascorbic acid;4-hexylresorcinol;potassium sorbate;modified atmosphere packaging;mangifera indica;shelf life;antibrowning agents;PROCESSED FRUITS; VEGETABLES; APPLE; 4-HEXYLRESORCINOL; INHIBITION; PRODUCTS; SLICES; LIFE; ACID SO - Journal of Agricultural and Food Chemistry 2000 ;48(9):4204-4208 813 UI - 16303 AU - Gonzalez-Aguilar GA AU - Gayosso L AU - Cruz R AU - Fortiz J AU - Baez R AU - Wang CY AD - Ctr Invest Alimentac & Desarrollo, AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoUSDA, Hort Crops Qual Lab, Beltsville, MD 20705, USAGonzalez-Aguilar, GA, Ctr Invest Alimentac & Desarrollo, AC, Direcc Tecnol Alimentos Origen Vegetal, AP 1735, Hermosillo 83000, Sonora, Mexico TI - Polyamines induced by hot water treatments reduce chilling injury and decay in pepper fruit AB - Treatment of peppers with hot water (53 degrees C) for 4 min was found to be effective in alleviating chilling injury and reducing decay after 14 and 28 days of storage at 8 degrees C. Treatment at 45 degrees C for 15 min was less effective in maintaining pepper quality during storage. Packaging with low density polyethylene film significantly reduced weight loss and chilling injury during low temperature storage. Lower O-2 and higher CO2 levels were found in internal and in-package atmospheres of heated fruit than controls. Ethylene was not detected in the in-package atmosphere of treated fruit, but was present in the control. Polyamine levels increased immediately after hot water treatments. Putrescine levels increased during storage at 8 degrees C particularly in heat-treated fruit and in packaged fruit. A significant increase in putrescine was noted in packaged fruit treated at 53 degrees C for 4 min after 14 days of storage. Spermine levels decreased in control fruit during storage. However, heat treatment in combination with film packaging maintained higher levels of spermine in peppers during storage than controls. These results indicated that hot water treatment in conjunction with film packaging may delay chilling injury and decay of bell peppers through a mechanism that involved elevation of polyamine levels. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000086110400003 L2 - polyamine;hot water dips;film packaging;chilling injury;decay;pepper;POSTHARVEST HEAT-TREATMENTS; POLYETHYLENE BAGS; FORTUNE MANDARINS; ZUCCHINI SQUASH; BELL PEPPERS; LOW-OXYGEN; TEMPERATURE; STORAGE; LIFE; DIPS SO - Postharvest Biology and Technology 2000 ;18(1):19-26 814 UI - 16419 AU - Gonzalez-Aguilar GA AU - Zacarias L AU - Perez-Amador MA AU - Carbonell J AU - Lafuente MT AD - CSIC, Inst Agroquim & Tecnol Alimentos, E-46100 Valencia, SpainCIAD, AC, Ctr Invest Alimentac & Desarrollo, Hermosillo, Sonora, MexicoUPV, CSIC, Inst Biol Mol & Celular Plantas, E-46022 Valencia, SpainLafuente, MT, CSIC, Inst Agroquim & Tecnol Alimentos, Apartado de Correos 73, E-46100 Valencia, Spain TI - Polyamine content and chilling susceptibility are affected by seasonal changes in temperature and by conditioning temperature in cold-stored 'Fortune' mandarin fruit AB - 'Fortune' mandarins are prone to develop pitting and necrosis upon exposure to low temperatures. We have examined the effect of field temperature during fruit maturation and the effect of conditioning temperatures (from 2 to 37 degrees C) prior to cold storage on the content of polyamines (PAs) and on chilling susceptibility in order to understand the role of PAs in maturation and chilling tolerance of this citrus cultivar. Chilling susceptibility and the content of PAs mere more affected by seasonal changes in field temperature than by the stage of fruit maturity. The highest putrescine (Put) and spermidine (Spd) content was found in fruits exposed to the lowest field temperatures. These fruits mere in turn more susceptible to develop chilling injury (CI) after storage at 2 degrees C. Spermine (Spm), however, decreased in attached fruit with time of exposure to temperatures below 12 degrees C. Temperature pretreatments for 3 days above 20 degrees C of fruits detached from the tree reduced CI, the more so the higher the conditioning temperature. Put and Spd increased,vith temperature conditioning in detached fruits, differing from the response of fruits attached to the tree. No direct relationship between induced levels of these PAs and the tolerance to CI was found. Levels of Put and Spd increased at temperatures (22, 30 and 37 degrees C) which increased the tolerance and also at temperatures (6 and 12 degrees C) which accelerated the appearance of chilling symptoms. In contrast, a significant increase in Spm levels,vas only found after conditioning at 30 or 37 degrees C. After cold storage a general decline in PA levels occurred in all temperature-conditioned mandarins. In mast cases no significant differences among fruit exposed to effective and non-effective pretreatments mere observed. PA content increased again after transferring cold-stored fruits to 20 degrees C, whereas the CI index was barely affected. In conclusion, PA changes in the flavedo of 'Fortune' mandarins appear to be related to variations in temperature rather than to stage of maturity or tolerance to chilling MH - Mexico|Sonora MH - Spain PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9317 UR - ISI:000085708700005 L2 - ABSCISIC-ACID; WATER DIPS; CITRUS-FRUIT; INJURY; SENESCENCE; DECAY; SPERMINE; TISSUES; STORAGE; STRESS SO - Physiologia Plantarum 2000 ;108(2):140-146 815 UI - 16466 AU - Gonzalez-Aguilar GA AU - Fortiz J AU - Cruz R AU - Baez R AU - Wang CY AD - Ctr Invest Alimentac & Desarrollo AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoUSDA ARS, Beltsville Agr Res Ctr, Beltsville, MD 20705, USAGonzalez-Aguilar, GA, Ctr Invest Alimentac & Desarrollo AC, Direcc Tecnol Alimentos Origen Vegetal, AP 1735, Hermosillo 83000, Sonora, Mexico TI - Methyl jasmonate reduces chilling injury and maintains postharvest quality of mango fruit AB - Exposure of mango (Mangifera indica cv. Tommy Atkins) fruit to methyl jasmonate (MJ) vapors (10(-4) M) for 24 h at 25 degrees C reduced chilling injury during subsequent storage for 21 days at 7 degrees C and after 5 days of shelf life at 20 degrees C. The chilling tolerance induced by MJ was positively correlated with the reduction in the percent ion leakage of mango tissue. The overall quality of MJ-treated fruit was also better than that of control fruit. MJ treatment increased the total soluble solids but did not affect titratable acidity or pH. MJ also did not change the normal climacteric rise in respiration, water loss, and softening rates. The efficacy of MJ to reduce chilling injury and decay of mango could be related to the tolerance induced at low temperature. It was concluded that MJ treatment may prevent chilling injury symptoms of mango without altering the ripening process MH - Mexico|Sonora MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000085510000066 L2 - Mangifera indica;methyl jasmonate;chilling injury;ion leakage;overall quality;ETHYLENE; PEEL SO - Journal of Agricultural and Food Chemistry 2000 ;48(2):515-519 816 UI - 14440 AU - Gonzalez-Astorga J AU - Nunez-Farfan J AD - UNAM, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, MexicoUniv Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USAGonzalez-Astorga, J, Jardin Bot Clavijero, Inst Ecol, Clavijero, Veracruz, Mexico TI - Variable demography in relation to germination time in the annual plant Tagetes micrantha Cav. (Asteraceae) AB - This study tests whether variability in a life history trait such as emergence time has: ecological and evolutionary significance in seasonal environments due to their relationship with fitness components. The population dynamics of nine different cohorts of seedlings emergence were analyzed in a natural population of the annual herb Tagetes micrantha Cav. (Asteraceae). Temporal variation in seedling emergence was related to the pattern of precipitation, while spatial variation could be related to topographical heterogeneity. Plants that emerged at the beginning of the season (early germination) had lower probabilities of survivorship than those that emerged at the end of the season (late germination). In contrast, plants that emerged early had, on average, higher fecundity than those that emerged late. The net result of three contrasting patterns of survival and fecundity constitute a life history trade-off in T. micrantha MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1385-0237 UR - ISI:000166537600011 L2 - Asteraceae;demography;fecundity;germination;heterogeneous environments;life history;Mexico;survival;Tagetes micrantha;trade-off;PHENOTYPIC PLASTICITY; SURVIVAL; POPULATIONS; SELECTION; EVOLUTION; DATE SO - Plant Ecology 2000 ;151(2):253-259 817 UI - 15641 AU - Gonzalez-Bashan LE AU - Lebsky VK AU - Hernandez JP AU - Bustillos JJ AU - Bashan Y AD - Ctr Biol Res NW CIB, La Paz 23000, Baja Calif Sur, MexicoPontificia Univ Javeriana, Dept Biol, Santafe De Bogota, ColombiaBashan, Y, Ctr Biol Res NW CIB, POB 128, La Paz 23000, Baja Calif Sur, Mexico TI - Changes in the metabolism of the microalga Chlorella vulgaris when coimmobilized in alginate with the nitrogen-fixing Phyllobacterium myrsinacearum AB - In an agroindustrial wastewater pond, a naturally occurring unicellular microalga, Chlorella vulgaris, was closely associated with the terrestrial plant-associative N-2-fixing bacterium Phyllobacterium myrsinacearum. When the two microorganisms were artificially coimmobilized in alginate beads, they shared the same internal bead cavities, and the production of five microalgal pigments increased, but there were no effects on the number of the cells or the biomass of the microalga. The association, however, reduces the ability of C. vulgaris to remove ammonium ions and phosphorus from water. The bacterium produced nitrate from ammonium in synthetic wastewater with or without the presence of the microalga, and fixed nitrogen in two culture media. Our results suggest that interactions between microalgae and associative bacteria should be considered when cultivating microalgae for wastewater treatment MH - Colombia MH - Mexico|Baja California Sur PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000088272400009 L2 - alginate;bacterial immobilization;microalgae;nitrogen fixation;Phyllobacterium;wastewater treatment;GROWTH-PROMOTING BACTERIA; WASTE-WATER TREATMENT; PLANT-GROWTH; REMOVAL; CELLS; IDENTIFICATION; CARRAGEENAN; ENHANCEMENT; BEADS; ALGAE SO - Canadian Journal of Microbiology 2000 ;46(7):653-659 818 UI - 15112 AU - Gonzalez-Ceron L AU - Rodriguez MH AU - Santillan FV AU - Hernandez JE AU - Wirtz RA AD - Inst Nacl Salud Publ, Ctr Invest Paludismo, Tapachula 30700, Chiapas, MexicoInst Nacl Salud Publ, Ctr Invest Sobre Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoInst Nacl Salud Publ, Dept Informat, Cuernavaca 62508, Morelos, MexicoCtr Dis Control & Prevent, Entomol Branch, Atlanta, GA 30345, USAGonzalez-Ceron, L, Inst Nacl Salud Publ, Ctr Invest Paludismo, POB 537, Tapachula 30700, Chiapas, Mexico TI - Susceptibility of three laboratory strains of Anopheles albimanus (Diptera : Culicidae) to coindigenous Plasmodium vivax circumsporozoite protein phenotypes in southern Mexico AB - The susceptibility to two coindigenous Plasmodium vivax Grassi & Feletti phenotypes VK210 and VK247 of three colonized Anopheles albimanus Wiedemann strains (white-striped, green and brown) from southern Mexico was investigated. Mosquitoes of the three strains were simultaneously fed with P. vivax-infected patient blood and examined 1 wk later for the presence of oocysts. The circumsporozoite protein phenotype type (VK210 and VK247) was determined by immunoflorescence of salivary gland sporozoites using monoclonal antibodies. The proportions of specimens infected and the number of oocyst per mosquito indicated that all mosquito strains were more susceptible to the phenotype VK210 than to VK247, but the white-striped strain was more susceptible to both parasite phenotypes than the other two strains MH - Mexico|Chiapas MH - Mexico|Morelos MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000089625200006 L2 - Anopheles albimanus;Plasmodium vivax;phenotypes;susceptibility;TRANSMISSION-BLOCKING IMMUNITY; FALCIPARUM; PSEUDOPUNCTIPENNIS; POPULATION; INFECTIONS; MOSQUITOS; VARIANTS; EPITOPE; VK247 SO - Journal of Medical Entomology 2000 ;37(3):331-334 819 UI - 16000 AU - Gonzalez-Chavez JL AU - Gonzalez F AU - Ballester A AU - Blazquez ML AD - UNAM, Fac Quim, Dpto Quim Analit, Mexico City, DF, MexicoUniv Complutense Madrid, Fac Ciencias Quim, Dpto Ciencia Mat, E-28040 Madrid, SpainGonzalez-Chavez, JL, UNAM, Fac Quim, Dpto Quim Analit, Cd Univ, Mexico City, DF, Mexico TI - Effect of mesophilic microorganisms on the electrochemical behavior of galena AB - In recent years, the bioleaching of sulfidic raw materials has been of great interest. However, the application of this biotechnology, is now very limited for many different complex reasons. The mechanism of the chemical and electrochemical reactions taking part in the process is not well understood The application of electrochemical techniques is useful in its elucidation. Among the common sulfides, galena has been studied very little with respect to its behavior during bioleaching. Therefore, the electrochemical evolution of massive electrodes of lead sulfide in the presence and absence of a mixed culture of mesophilic microorganisms was investigated by the application of potentiometry, anodic and cathodic polarization and cyclic voltammetry. The agitation rate, the use of pH control and the composition of the nutrient mediums did not have any significant affects on the oxidation of galena. However, the temperature (25 degrees to 45 degrees C), the scan rate (4 to 100 mV/s) and the acid used to adjust the pH were significant variables that influenced sulfide oxidation. Therefore, the peak (600 to 1,000 mV) corresponding to the oxidation of sulfide ions from the mineral was only detected ill the presence of a complexing anion of lead In the presence of bacteria, the peaks corresponding to galena oxidation decreased and, at the same time, new peaks appeared both during the oxidation at -300 mV and during the reduction of the mineral surface at 150 and -300 mV. These signals were more important,when the attack time increased The rest potential of bioleached mineral increased with an increase ill leaching time, which I was related to the electrochemical transformation of the galena surface MH - Mexico|Distrito Federal MH - Spain PB - LITTLETON: SOC MINING METALLURGY EXPLORATION INC RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering;Mining & Mineral Processing U5 - J;Article AV - English IS - 0747-9182 UR - ISI:000087094600007 L2 - bioleaching;sulfides;galena;DISSOLUTION; KINETICS SO - Minerals & Metallurgical Processing 2000 ;17(2):116-120 820 UI - 14860 AU - Gonzalez-Esquerra R AU - Leeson S AD - Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Carretera Cuautitlan Teoloyucan, San Sebastian Xhala 54700, Cuautitlan Izca, MexicoLeeson, S, Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, Canada TI - Effect of feeding hens regular or deodorized menhaden oil on production parameters, yolk fatty acid profile, and sensory quality of eggs AB - An experiment was conducted to investigate whether feeding menhaden oil (MO) to hens affects egg weight, and whether using deodorized MO (DMO) could ameliorate decreased sensory quality of eggs (characteristic for hens fed high fish oil diets). Two-hundred twenty-four Single Comb White Leghorn hens were allocated to seven dietary treatments comprising either no fish oil, DMO, or regular MO (RMO) at 2, 4, and 6% in commercial-type diets from 19 to 55 wk of age. The data collected were analyzed in four experimental periods (i.e., 0, 2, 6, and 9 mo after feeding MO diets). The sensory evaluation of 2-wk stored eggs from hens fed the 2% RMO, 2% DMO, and control diets was undertaken. Egg weight decreased linearly with increasing MO in all periods tested (P < 0.05). The panelist's scores of aroma, taste, flavor, and acceptability of eggs from hens fed diets containing 2% of either RMO or DMO were lower (P < 0.05) than for control eggs. Greater aftertaste and off-flavors in these eggs were also detected No differences in sensory quality (P > 0.05) for eggs from hens fed RMO vs. DMO were found. These results suggest that the deodorization of MO does not ameliorate the impaired sensory quality of eggs characteristic of hens fed MO MH - Canada MH - Mexico|Estado De Mexico PB - SAVOY: POULTRY SCIENCE ASSOC INC RP - NOT IN FILE U3 - TC 12 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0032-5791 UR - ISI:000165261000016 L2 - omega-3;omega-3 eggs;menhaden oil;deodorized menhaden oil;egg sensory quality;LAYING HENS; SHELL EGGS; DIETARY; VOLATILES; FLAX SO - Poultry Science 2000 ;79(11):1597-1602 821 UI - 14861 AU - Gonzalez-Esquerra R AU - Leeson S AD - Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Carretera Cuautitlan Teoloyucan, San Sebastian Xhala 54700, Cuautitlan Izca, MexicoLeeson, S, Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, Canada TI - Studies on the metabolizable energy content of ground full-fat flaxseed fed in mash, pellet, and crumbled diets assayed with birds of different ages AB - Four experiments were carried out to determine the AME(n) of ground flaxseed in chickens of different ages and to study the effect of feeding flaxseed in pelleted or crumbled diets on flaxseed AME(n). A corn-soybean meal basal diet was prepared, in which the energy-yielding ingredients were substituted with ground flaxseed at 5, 10, 15, or 20%. Experiments 1, 2, and 3 consisted of these five dietary treatments replicated six times using 9-d-, 6-wk-, and 79-wk-old birds, respectively. A total collection procedure was used to measure diet AME(n), and linear regression analyses were used to calculate the AME(n) value of flaxseed for birds at different ages. Experiment 4 involved birds fed either a basal, or a 10% ground flaxseed diet prepared as mash, pellets, or crumbles. The flaxseed AME(n) values obtained with 9-d- and 6-wk-old chickens were 2,118 and 2,055 kcal/kg, respectively. These values contrast with those of Experiments 3 and 4, in which mature roosters were fed mash diets with AME(n) values of 3,560 and 3,654 kcal/kg, respectively. In Experiment 4, a significant improvement in flaxseed AME(n) was observed when diets were pelleted or crumbled (4,578 and 4,277 kcal/kg, respectively). We concluded that the difference in AME(n) of flaxseed observed in young birds vs. that found in mature birds was likely due to a greater tolerance of the latter to flaxseed, with less evidence of diarrhea. Feeding flaxseed in pellet or crumbled diets can significantly increase AME(n) value MH - Canada MH - Mexico|Estado De Mexico PB - SAVOY: POULTRY SCIENCE ASSOC INC RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0032-5791 UR - ISI:000165261000017 L2 - metabolizable energy;linseed;flaxseed;chickens;feed form;AMINO-ACID AVAILABILITY; POULTRY; LINSEED; CANOLA; SEEDS; MEAT; EGGS; HENS SO - Poultry Science 2000 ;79(11):1603-1607 822 UI - 16628 AU - Gonzalez-Garcia J AU - Ray IM AU - Henning JA AU - Murray LW AD - New Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USANew Mexico State Univ, Univ Stat Ctr, Las Cruces, NM 88003, USAARS, USDA, Corvallis, OR 97331, USAUniv Autonoma Chihuahua, Fac Ciencias Agr & Forestales, Mexico City 33000, DF, MexicoRay, IM, New Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003 USA TI - Quantitative genetic analysis of erect glandular trichome density in diploid alfalfa AB - The presence of glandular trichomes may protect alfalfa (Medicago sativa L.) against certain stem-, leaf-, and fruit-eating insect pests. In order to determine appropriate breeding methods to select for this trait, this study characterized quantitative genetic parameters of erect glandular trichome density in 'KS94GH6' diploid (2n=2x=16) alfalfa. Eight female and five male plants were crossed in a Design II mating to produce 40 full-sib families. Glandular trichome density was determined on these families under replicated greenhouse conditions in Las Cruces and Los Lunas, New Mexico, U.S.A. The effect of males was significant (p less than or equal to 0.10) across the two environments. Variation among females was not significant within either location or across locations. The dominance genetic variance (sigma(D)(2) = 0.210) was greater than the additive genetic variance (sigma(A)(2) = 0.111). The average degree of dominance exceeded a value of '1' indicating that erect glandular trichome density in KS94GH6 may be influenced by digenic epistasis, and/or repulsion phase linkage disequilibrium. The large contribution of non-additive effects was reflected by a low narrow-sense heritability estimate (h(n)(2) = 0.25). The results indicate that further improvements in erect glandular trichome density in KS94GH6 alfalfa will require replicated progeny testing. Approaches to introgress this trait into cultivated tetraploid alfalfa are discussed MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000084818800009 L2 - alfalfa;genetics;heritability;trichomes;POLYPHENOL OXIDASE ACTIVITY; MULTIPLE PEST RESISTANCE; INHERITANCE; MEDICAGO; REGISTRATION; GERMPLASM; SOLANUM SO - Euphytica 2000 ;111(1):61-65 823 UI - 15266 AU - Gonzalez-Mariscal G AU - Melo AI AU - Parlow AF AU - Beyer C AU - Rosenblatt JS AD - Univ Autonoma Tlaxcala, CINVESTAV, Ctr Invest Reprod Anim, Tlaxcala 9000, MexicoHarbor UCLA Med Ctr, Natl Hormone & Pituitary Program, Torrance, CA 90509, USARutgers State Univ, Dept Psychol, Newark, NJ 07102, USAGonzalez-Mariscal, G, Univ Autonoma Tlaxcala, CINVESTAV, Ctr Invest Reprod Anim, Apdo Postal 62, Tlaxcala 9000, Mexico TI - Pharmacological evidence that prolactin acts from late gestation to promote maternal behaviour in rabbits AB - We investigated the role of prolactin and suckling stimulation in the expression of maternal behaviour of primiparous rabbits. Bromocriptine (1 mg/kg/day), given to intact mothers across postpartum days 1-5, decreased serum concentrations of prolactin to undetectable levels, reduced crouching, and increased time inside the nest. Failure of maternal nest-building, provoked by bromocriptine injections from pregnancy day 26 to parturition or to postpartum day 5, correlated with a stronger reduction in crouching and an increased time inside the nest, measures of disturbed maternal behaviour, on postpartum days 3 and 5. Preventing suckling by thelectomy did not prevent prolactin release but reduced crouching incidence and increased the time spent inside the nest on postpartum days 3 and 5. Bromocriptine, injected in thelectomized mothers across postpartum days 1-5, further reduced the incidence of crouching and increased the time spent inside the nest on postpartum days 3 and 5. We conclude that prolactin acting prepartum facilitates maternal behaviour initiation in rabbits and, together with pup stimulation, maintains this behaviour across lactation MH - Mexico|Tlaxcala MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0953-8194 UR - ISI:000089331300007 L2 - prolactin;maternal behaviour;rabbit;thelectomy;bromocriptine;NULLIPAROUS FEMALE RATS; CHIN-MARKING BEHAVIOR; MEDIAL PREOPTIC AREA; PLACENTAL-LACTOGEN; REPRODUCTIVE-CYCLE; MESSENGER-RNA; LACTATION; RECEPTOR; RELEASE; INFUSIONS SO - Journal of Neuroendocrinology 2000 ;12(10):983-992 824 UI - 14801 AU - Gonzalez-Rodriguez E AU - Montanez-Ojeda C AU - Ray PN AU - Howard PL AU - Garcia-Sierra F AD - CINVESTAV, Mexico City 14000, DF, MexicoUniv Toronto, Dept Mol & Med Genet, Toronto, ON, CanadaNorthwestern Univ, Sch Med, Dept Cell & Mol Biol, Chicago, IL, USA TI - Alternative splicing regulates the nuclear or cytoplasmic localization of dystrophin Dp71 MH - Canada MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400701069 SO - American Journal of Human Genetics 2000 ;67(4):199-199 825 UI - 15019 AU - Gonzalez-Valencia G AU - Atherton JC AU - Munoz O AU - Dehesa M AU - Madrazo-de la Garza A AU - Torres J AD - Inst Mexicano Seguro Social, Hosp Especialidades, Mexico City, DF, MexicoInst Mexicano Seguro Social, Hosp Especialidades, Serv Gastroenterol, Mexico City, DF, MexicoInst Mexicano Seguro Social, Hosp Pediat, Serv Gastroenterol, Mexico City, DF, MexicoUniv Nottingham, Div Gastroenterol, Nottingham NG7 2RD, EnglandUniv Nottingham, Inst Infect & Immun, Nottingham NG7 2RD, EnglandTorres, J, IMSS, Ctr Med Nacl S21, Hosp Pediat, Unidad Invest Enfermedades Infecciosas, Av Cuauhtemoc 330, Mexico City 06725, DF, Mexico TI - Helicobacter pylori vacA and cagA genotypes in Mexican adults and children AB - Studies examining associations between Helicobacter pylori virulence markers and disease have concentrated on adults in developed countries. This study assessed adults and children in Mexico. Ninety patients were recruited, 56 adults (37 with active peptic ulceration and 19 with no ulcers) and 34 children (all with recurrent abdominal pain and no ulcers), H. pylori was cultured from gastric biopsy specimens, and, vacA alleles and cagA were typed by use of polymerase chain reaction from multiple colony sweeps. Multiple vacA types were common in single-biopsy isolates and were more frequent in adults with ulcers (95%) than in adults without ulcers (37% P < .001) or in children (52%; P < .01). vacA s1b and cagA+ strains were more frequent in adults than in children. vacA s1 and cagA+ strains had similar frequencies in adults with and without ulcers, In conclusion, infection with multiple H. pylori strains, defined by different vacA genotypes, is common in Mexico. Such mixed infection is associated with ulcer disease. Strain populations infecting Mexican adults and children differ MH - United Kingdom MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 25 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000090106000021 L2 - MULTIPLE STRAIN COLONIZATION; VACUOLATING CYTOTOXIN GENE; ALLELIC DIVERSITY; VIRULENCE FACTORS; IDENTIFICATION; EXPRESSION; INFECTION; DISEASE SO - Journal of Infectious Diseases 2000 ;182(5):1450-1454 826 UI - 15085 AU - Gonzalez E AU - Montanez C AU - Ray PN AU - Howard PL AU - Garcia-Sierra F AU - Mornet D AU - Cisneros B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoHosp Sick Children, Dept Genet, Pediat Lab Med & Res Inst, Toronto, ON M5G 1X8, CanadaNorthwestern Univ, Sch Med, Dept Cell & Mol Biol, Chicago, IL 60611, USAInst Bouisson Bertrand, INSERM, U128, F-34196 Montpellier 5, FranceCisneros, B, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Ave Inst Politecn Nacl 2508,Apartado Postal 14-74, Mexico City 07000, DF, Mexico TI - Alternative splicing regulates the nuclear or cytoplasmic localization of dystrophin Dp71 AB - The subcellular distribution of Dp71 isoforms alternatively spliced for exon 71 and/or 78 was examined. The cDNA sequence of each variant was fused to the C-terminus of the green fluorescent protein and the constructs were transfected transiently in the cell lines HeLa, C2C12 and N1E-115. The subcellular distribution of the fused proteins was determined by confocal microscope analysis. The Dp71 isoform lacking the amino acids encoded by exons 71 and 78 was found exclusively in the cytoplasm whereas the variants containing the amino acids encoded by exon 71 and/or exon 78 show a predominant nuclear localization. The nuclear localization of Dp71 provides a new clue towards the establishment of its cellular function. (C) 2000 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Canada MH - France MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000089847300009 L2 - Dp71;alternative splicing;nuclear localization;green fluorescent protein;protein fusion;C-TERMINAL DOMAIN; GLYCOPROTEIN COMPLEX; NONMUSCLE TISSUES; PROTEIN-KINASE; MAJOR PRODUCT; BINDING-SITE; DMD GENE; TRANSCRIPT; EXPRESSION; BRAIN SO - Febs Letters 2000 ;482(3):209-214 827 UI - 15616 AU - Gonzalez H AU - Nagai Y AU - Bub G AU - Glass L AU - Shrier A AD - UNAM, Fac Ciencias, Lab Biofis, Mexico City, DF, MexicoDept Physiol, Montreal, PQ H3G 1Y6, CanadaGonzalez, H, UNAM, Fac Ciencias, Lab Biofis, Mexico City, DF, Mexico TI - Resetting and annihilating reentrant waves in a ring of cardiac tissue: Theory and experiment AB - Theory predicts that a stimulus delivered to an excitation wave circulating on a ring of excitable media will either have no effect, or it will reset or annihilate the excitation depending on the phase and magnitude of the stimulus. We summarize the basis for these theoretical predictions and demonstrate these phenomena in an experimental system consisting of a tissue culture of embryonic chick heart cells cultured in the shape of a ring MH - Canada MH - Mexico|Distrito Federal PB - KYOTO: PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9687 UR - ISI:000088239700009 L2 - PATTERNED GROWTH; EXCITABLE MEDIA; PROPAGATION; MODEL SO - Progress of Theoretical Physics Supplement 2000 ;(139):83-89 828 UI - 16247 AU - Gonzalez LE AU - Bashan Y AD - CIB, Ctr Biol Res NW, La Paz 23000, BCS, MexicoPontificia Univ Javeriana, Dept Biol, Santafe De Bogota, ColombiaBashan, Y, CIB, Ctr Biol Res NW, POB 128, La Paz 23000, BCS, Mexico TI - Increased growth of the microalga Chlorella vulgaris when coimmobilized and cocultured in alginate beads with the plant-growth-promoting bacterium Azospirillum brasilense AB - Coimmobilization of the freshwater microalga Chlorella vulgaris and the plant-growth-promoting bacterium Azospirillum brasilense in small alginate beads resulted in a significantly increased growth of the microalga. Dry and fresh weight, total number of cells, size of the microalgal clusters (colonies) within the bead, number of microalgal cells per cluster, and the levels of microalgal pigments significantly increased. Light microscopy revealed that both microorganisms colonized the same cavities inside the beads, though the microalgae tended to concentrate in the more aerated periphery while the bacteria colonized the entire bead. The effect of indole-3-acetic acid addition to microalgal culture prior to immobilization of microorganisms in alginate beads partially imitated the effect of A. brasilense. Ne propose that coimmobilization of microalgae and plant-growth-promoting bacteria is an effective means of increasing microalgal populations within confined environments MH - Colombia MH - Mexico|Baja California Sur PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 21 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000086284700042 L2 - WASTE-WATER; P-REMOVAL; MICROORGANISMS; IMMOBILIZATION; RHIZOBACTERIA; INOCULATION; AGRICULTURE; RHIZOSPHERE; TECHNOLOGY; EVOLUTION SO - Applied and Environmental Microbiology 2000 ;66(4):1527-1531 829 UI - 14824 AU - Gonzalez MC AU - Hanlin RT AU - Ulloa M AD - Univ Nacl Autonoma Mexico, Lab Micol, Dept Bot, Inst Biol, Mexico City 04510, DF, MexicoUniv Georgia, Dept Plant Pathol, Athens, GA 30602, USAGonzalez, MC, Univ Nacl Autonoma Mexico, Lab Micol, Dept Bot, Inst Biol, AP 70-233, Mexico City 04510, DF, Mexico TI - Guanomyces, a new genus of Ascomycetes from Mexico AB - A new genus is described to accommodate a species isolated from bat dung. This fungus forms a membranous ascoma with a long neck that is ornamented with lateral glandular hairs and terminal aglandular hairs; filamentous, septate paraphyses and deliquescent asci with hyaline, unicellular ascospores are formed in the base of the centrum. In order to analyze the systematic position of this ascomycete, its morphological characters and 18S rDNA sequences were studied and compared with superficially similar species. Based on morphological and phylogenetic analysis of 18S rDNA sequences, this fungus belongs in the Sordariales and is close to but separate from Chaetomium. The hyaline ascospores, without a germ pore, and the possession of an ascoma with a long neck ornamented with lateral glandular hairs is in contrast to other genera of the Chaetomiaceae. For these reasons, the new genus Guanomyces is proposed to accommodate the new species G. polythrix in the Chaetomiaceae of the Sordariales MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000165469100015 L2 - Ascomycota;bat dung;coprophilous;rDNA sequences;Sordariales;systematics;POLYMERASE; DNA SO - Mycologia 2000 ;92(6):1138-1148 830 UI - 15397 AU - Gonzalez MU AU - Sanchez-Gil JA AU - Gonzalez Y AU - Gonzalez L AU - Mendez ER AD - Consejo Super Invest Cient, Inst Microelect Madrid, CNM, Madrid 28760, SpainConsejo Super Invest Cient, Inst Estructura Mat, Madrid 28006, SpainCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoGonzalez, MU, Consejo Super Invest Cient, Inst Microelect Madrid, CNM, C Isaac Newton 8, Madrid 28760, Spain TI - Polarized laser light scattering applied to surface morphology characterization of epitaxial III-V semiconductor layers AB - In this paper, we analyze typical morphologies of epitaxial III-V semiconductor layers by using a polarized laser Light scattering technique. Crosshatched topographies, which are developed during heteroepitaxial growth, are studied. A sample with an intentionally high density of oval defects is also explored to establish how the laser light scattering pattern is affected by the presence of these defects, which are unavoidable in the epitaxial layers grown by molecular beam epitaxy. The former topographies produce a scattered light pattern that is highly anisotropic, with the intensity concentrated along two preferential directions; the latter defects give rise to a fairly isotropic pattern. Employing a perturbation-theoretical model, whose applicability and consistency are explicitly demonstrated by our results, the surface power spectral density is retrieved from the angle-resolved light scattering experimental data. For the samples exhibiting crosshatched topography, the scattering measurements provide information that allows us to model the roughness of the surface in terms of two quasi-one-dimensional, anisotropic components, and one two-dimensional, isotropic, long-range background. The root mean square heights and the typical lateral distances between ridges are obtained in quantitative agreement with the values extracted from the atomic force microscopy measurements. For the sample presenting oval defects, we consider their contribution to the surface power spectral density by means of a simple model of randomly distributed particles on a surface, and we compare the resulting power spectral density with typical behavior found in the literature for good-morphology GaAs layers. With the help of the ex situ information thus obtained, we also discuss the implementation of the light scattering technique for in situ monitoring during epitaxial growth. (C) 2000 American Vacuum Society. [S0734-211X(00)04904-0] MH - Mexico|Baja California MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000088834400029 L2 - CHEMICAL BEAM EPITAXY; ELECTROMAGNETIC-WAVES; DIELECTRIC SURFACES; MULTILAYER OPTICS; RANDOMLY ROUGH; THIN-FILM; GAAS; MICROSTRUCTURE SO - Journal of Vacuum Science & Technology B 2000 ;18(4):1980-1990 831 UI - 14756 AU - Goodman MM AU - Moreno J AU - Castillo F AU - Holley RN AU - Carson ML AD - N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695, USAICA Tibaitata, Bogota, ColombiaColegio Postgraduados, Ctr Genet, Montecillos, MexicoNovartis Seeds, Henderson, KY, USANC State Univ, Dept Plant Pathol, USDA ARS, Raleigh, NC, USAGoodman, MM, N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695 USA TI - Using tropical maize germplasm for temperate breeding AB - Despite many efforts, little truly exotic germplasm is represented in U.S. maize hybrids. A wide array of tropical materials is available and use of elite tropical materials that have been through the inbreeding process is the quickest way to use tropical maize germplasm for temperate breeding programs, but how does one choose which material to use? Because of reaction to photoperiod, evaluating tropical germplasm sources is virtually impossible in the U.S. Corn Belt. N. C. State is involved in the development of inbred lines with high percentages of exotic germplasm via a process called incorporation by Simmonds, rather than the backcross introgression procedures adopted by most breeders. The advanced, largely-tropical lines at N.C. State all trace back to intercrosses among elite tropical hybrids. Results of second generation lines derived by phenotypic selection while selfing are reported here, including the results of testing under temperate and tropical conditions using both a temperate and a tropical tester. The results suggest that selection in either a very different location or with a very different tester can result in definite improvement in breeding value. Rarely would more extreme comparisons be made, yet all the rank correlations between testers and beta een environments were consistently positive and significant. Six lines have been released from these studies: NC298 and NC300 in 1991, NC304 in 1994, NC340 in 1997, and NC348 and NC350 in 1998. A joint public-private program called GEM (Germplasm Enhancement of Maize) also has been developed to move tropical germplasm more rapidly into breeding programs. The first widespread testing of family topcrosses from 50%-tropical materials has now been completed, and those results are summarized here MH - Colombia MH - Mexico|Estado De Mexico MH - USA PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000165651600008 L2 - maize breeding;tropical germplasm;introgression;incorporation;FAVORABLE ALLELES; EXOTIC GERMPLASM; INBRED LINES; POPULATIONS; INTROGRESSION; YIELD; ACCESSIONS; CROSSES; CORN SO - Maydica 2000 ;45(3):221-234 832 UI - 14805 AU - Goodrich DC AU - Chehbouni A AU - Goff B AU - MacNish B AU - Maddock T AU - Moran S AU - Shuttleworth WJ AU - Williams DG AU - Watts C AU - Hipps LH AU - Cooper DI AU - Schieldge J AU - Kerr YH AU - Arias H AU - Kirkland M AU - Carlos R AU - Cayrol P AU - Kepner W AU - Jones B AU - Avissar R AU - Begue A AU - Bonnefond JM AU - Boulet G AU - Branan B AU - Brunel JP AU - Chen LC AU - Clarke T AU - Davis MR AU - DeBruin H AU - Dedieu G AU - Elguero E AU - Eichinger WE AU - Everitt J AU - Garatuza-Payan J AU - Gempko VL AU - Gupta H AU - Harlow C AU - Hartogensis O AU - Helfert M AU - Holifield C AU - Hymer D AU - Kahle A AU - Keefer T AU - Krishnamoorthy S AU - Lhomme JP AU - Lagouarde JP AU - Lo Seen D AU - Luquet D AU - Marsett R AU - Monteny B AU - Ni W AU - Nouvellon Y AU - Pinker R AU - Peters C AU - Pool D AU - Qi J AU - Rambal S AU - Rodriguez J AU - Santiago F AU - Sano E AU - Schaeffer SM AU - Schulte M AU - Scott R AU - Shao X AU - Snyder KA AU - Sorooshian S AU - Unkrich CL AU - Whitaker M AU - Yucel I AD - USDA ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USAIRD, IMADES, Hermosillo, Sonora, MexicoUniv Arizona, Tucson, AZ, USAUSDA ARS, Water Conservat Lab, Phoenix, AZ, USAUtah State Univ, Logan, UT 84322, USAUniv Calif Los Alamos Natl Lab, Los Alamos, NM, USACESBIO, Toulouse, FranceCIRAD, Montpellier, FranceUniv Iowa, Iowa City, IA, USAAUW, Wageningen, NetherlandsCNRS, CEFE, Montpellier, FranceUSDA ARS, Weslaco, TX 78596, USACALTECH, Jet Prop Lab, Pasadena, CA, USAINRA, Bordeaux, FranceUSGS, WRD, Tucson, AZ, USAUS EPA, Las Vegas, NV 89193, USAAudubon Res Ranch, Elgin, AZ, USARutgers State Univ, New Brunswick, NJ 08903, USAUniv Maryland, College Pk, MD 20742, USAGoodrich, DC, USDA ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USA TI - Preface paper to the Semi-Arid Land-Surface-Atmosphere (SALSA) Program special issue AB - The Semi-Arid Land-Surface-Atmosphere Program (SALSA) is a multi-agency, multi-national research effort that seeks to evaluate the consequences of natural and human-induced environmental change in semi-arid regions. The ultimate goal of SALSA is to advance scientific understanding of the semi-arid portion of the hydrosphere-biosphere interface in order to provide reliable information for environmental decision making. SALSA approaches this goal through a program of long-term, integrated observations, process research, modeling, assessment, and information management that is sustained by cooperation among scientists and information users. In this preface to the SALSA special issue, general program background information and the critical nature of semi-arid regions is presented. A brief description of the Upper San Pedro River Basin, the initial location for focused SALSA research follows. Several overarching research objectives under which much of the interdisciplinary research contained in the special issue was undertaken are discussed. Principal methods, primary research sites and data collection used by numerous investigators during 1997-1999 are then presented. Scientists from about 20 US, five European (four French and one Dutch), and three Mexican agencies and institutions have collaborated closely to make the research leading to this special issue a reality. The SALSA Program has served as a model of interagency cooperation by breaking new ground in the approach to large scale interdisciplinary science with relatively limited resources. Published by Elsevier Science B.V MH - France MH - Mexico|Sonora MH - Netherlands MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800002 L2 - interdisciplinary;semi-arid;land-surface-atmosphere;SALSA;water balance;energy balance;ecological diversity SO - Agricultural and Forest Meteorology 2000 ;105(1-3):3-20 833 UI - 14814 AU - Goodrich DC AU - Scott R AU - Qi J AU - Goff B AU - Unkrich CL AU - Moran MS AU - Williams D AU - Schaeffer S AU - Snyder K AU - MacNish R AU - Maddock T AU - Pool D AU - Chehbouni A AU - Cooper DI AU - Eichinger WE AU - Shuttleworth WJ AU - Kerr Y AU - Marsett R AU - Ni W AD - USDA ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USAUniv Arizona, Tucson, AZ, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Arkansas, Fayetteville, AR 72701, USAUS Geol Survey, Div Water Resources, Tucson, AZ, USAIRD, IMADES, Hermosillo, Sonora, MexicoUniv Calif Los Alamos Natl Lab, Los Alamos, NM, USAUniv Iowa, Iowa City, IA, USACESBIO, Toulouse, FranceGoodrich, DC, USDA ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USA TI - Seasonal estimates of riparian evapotranspiration using remote and in situ measurements AB - In many semi-arid basins during extended periods when surface snowmelt or storm runoff is absent, groundwater constitutes the primary water source for human habitation, agriculture and riparian ecosystems. Utilizing regional groundwater models in the management of these water resources requires accurate estimates of basin boundary conditions. A critical groundwater boundary condition that is closely coupled to atmospheric processes and is typically known with little certainty is seasonal riparian evapotranspiration (ET), This quantity can often be a significant factor in the basin water balance in semi-arid regions yet is very difficult to estimate over a large area. Better understanding and quantification of seasonal, large-area riparian ET is a primary objective of the Semi-Arid Land-Surface-Atmosphere (SALSA) Program. To address this objective, a series of interdisciplinary experimental campaigns were conducted in 1997 in the San Pedro Basin in southeastern Arizona. The riparian system in this basin is primarily made up of three vegetation communities: mesquite (Prosopis velutina), sacaton grasses (Sporobolus wrightii), and a cottonwood (Populus fremontii)/willow (Salix goodingii) forest gallery. Micrometeorological measurement techniques were used to estimate ET from the mesquite and grasses. These techniques could not be utilized to estimate fluxes from the cottonwood/willow (C/W) forest gallery due to the height (20-30 m) and non-uniform linear nature of the forest gallery. Short-term (2-4 days) sap flux measurements were made to estimate canopy transpiration over several periods of the riparian growing season. Simultaneous remote sensing measurements were used to spatially extrapolate tree and stand measurements. Scaled C/W stand level sap flux estimates were utilized to calibrate a Penman-Monteith model to enable temporal extrapolation between synoptic measurement periods. With this model and set of measurements, seasonal riparian vegetation water use estimates for the riparian corridor were obtained. To validate these models, a 90-day pre-monsoon water balance over a 10 km section of the river was carried out. All components of the water balance, including riparian ET, were independently estimated. The closure of the water balance was roughly 5% of total inflows. The ET models were then used to provide riparian ET estimates over the entire corridor for the growing season. These estimates were approximately 14% less than those obtained from the most recent,groundwater model of the basin for a comparable river reach. Published by Elsevier Science B.V MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 40 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800020 L2 - riparian evapotranspiration;Penman-Monteith model;cottonwood/willow transpiration;SALSA program;interdisciplinary;water balance;TROPICAL FOREST; CANOPY SO - Agricultural and Forest Meteorology 2000 ;105(1-3):281-309 834 UI - 16439 AU - Gordin F AU - Chaisson RE AU - Matts JP AU - Miller C AU - Garcia MD AU - Hafner R AU - Valdespino JL AU - Coberly J AU - Schechter M AU - Klukowicz AJ AU - Barry MA AU - O'Brien RJ AD - Vet Affairs Med Ctr, Washington, DC 20422, USAGeorgetown Univ, Washington, DC, USAJohns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Hyg & Publ Hlth, Dept Int Hlth, Baltimore, MD, USAUniv Minnesota, Sch Publ Hlth, Community Programs Clin Res AIDS, Ctr Stat, Minneapolis, MN, USAUniv Minnesota, Sch Publ Hlth, Div Biostat, Minneapolis, MN 55455, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoNIAID, Div AIDS, Bethesda, MD 20892, USAUniv Fed Rio de Janeiro, Dept Prevent Med, Hosp Univ Clementino Fraga Filho, Infect Dis Serv, BR-21941 Rio De Janeiro, BrazilSt Michaels Med Ctr, Div Pulm, Newark, NJ, USABoston Publ Hlth Commiss, Boston, MA, USACtr Dis Control & Prevent, Div TB Eliminat, Natl Ctr HIV STD & TB Prevent, Atlanta, GA, USAGordin, F, Vet Affairs Med Ctr, 50 Irving St NW, Washington, DC 20422 USA TI - Rifampin and pyrazinamide vs isoniazid for prevention of tuberculosis in HIV-infected persons - An international randomized trial AB - Context Because of problems with adherence, toxicity, and increasing resistance associated with 6- to 12-month isoniazid regimens, an alternative short-course tuberculosis preventive regimen is needed. Objective To compare a 2-month regimen of daily rifampin and pyrazinamide with a 12-month regimen of daily isoniazid in preventing tuberculosis in persons with human immunodeficiency virus (HIV) infection. Design Randomized, open-label controlled trial conducted from September 1991 to May 1996, with follow-up through October 1997. Setting Outpatient clinics in the United States, Mexico, Haiti, and Brazil. Participants A total of 1583 HIV-positive persons aged 13 years or older with a positive tuberculin skin test result. Interventions Patients were randomized to isoniazid, 300 mg/d, with pyridoxine hydrochloride for 12 months (n = 792) or rifampin, 600 mg/d, and pyrazinamide, 20 mg/kg per day, for 2 months (n = 791). Main Outcome Measures The primary end point was culture-confirmed tuberculosis; secondary end points were proven or probable tuberculosis, adverse events, and death, compared by treatment group. Results Of patients assigned to rifampin and pyrazinamide, 80% completed the regimen compared with 69% assigned to isoniazid (P<.001). After a mean follow-up of 37 months, 19 patients (2.4%) assigned to rifampin and pyrazinamide and 26 (3.3%) assigned to isoniazid developed confirmed tuberculosis at rates of 0.8 and 1.1 per 100 person-years, respectively (risk ratio, 0.72 [95% confidence interval, 0.40-1.31]; P =.28). In multivariate analysis, there were no significant differences in rates for confirmed or probable tuberculosis (P =.83), HIV progression and/or death (P =.09), or overall adverse events (P =.27), although drug discontinuation was slightly higher in the rifampin and pyrazinamide group (P =.01). Neither regimen appeared to, lead to the development of drug-resistant tuberculosis. Conclusions Our data suggest that for preventing tuberculosis in HIV-infected patients, a daily 2-month regimen of rifampin and pyrazinamide is similar in safety and efficacy to a daily 12-month regimen of isoniazid. This shorter regimen offers practical advantages to both patients and tuberculosis control programs MH - Brazil MH - Mexico|Morelos MH - USA PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 114 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0098-7484 UR - ISI:000085696700029 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; RESISTANT TUBERCULOSIS; ACTIVE TUBERCULOSIS; UNITED-STATES; DRUG-USERS; THERAPY; RISK; PROGRESSION; PROPHYLAXIS; OUTBREAK SO - Jama-Journal of the American Medical Association 2000 ;283(11):1445-1450 835 UI - 14163 AU - Gordon CE AU - Ornelas JF AD - Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAInst Ecol, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoGordon, CE, Univ Arizona, Dept Ecol & Evolutionary Biol, BSW 310, Tucson, AZ 85721 USA TI - Comparing endemism and habitat restriction in Mesoamerican tropical deciduous forest birds: implications for biodiversity conservation planning AB - Biogeographical endemism and habitat restriction are two easily measured quantities that can be used as indicators of species' ecological restrictions. We analysed and compared these two types of information from available literature sources in an attempt to identify all bird species critically dependent on tropical deciduous forests of western Mexico and Central America. Based on patterns of biogeographical restriction, we identified 42 endemics, 33 disjunct endemics, 59 corridor species and 3 seasonal endemics associated with tropical deciduous forest (TDF) in this region. Based on patterns of habitat use in these species, we classified them as 50 tropical deciduous forest-restricted species and 82 apparent habitat generalist species. No habitat use information was available within the TDF belt for five of the biogeographically restricted species. We found a high proportion of apparent habitat generalists (60%) among biogeographically restricted species. We discuss three specific scenarios in which species critically dependent on TDF may nonetheless appear generalized in their patterns of habitat use. These species are termed "cryptic habitat specialists." The proportion of apparent habitat generalists is highly variable among biogeographical regions and habitat types. Thus, global biodiversity conservation prioritizations that rely on habitat restriction as an indicator of ecological sensitivity may underestimate conservation needs within bioregions that contain high proportions of cryptic habitat specialists MH - USA MH - Mexico|Veracruz PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Ornithology U5 - J;Article AV - English IS - 0959-2709 UR - ISI:000167443200001 L2 - MEXICO; MIGRATION; DESIGN SO - Bird Conservation International 2000 ;10(4):289-303 836 UI - 14463 AU - Gorokhovsky A AU - Mescheryakov D AU - Gorokhovsky V AU - Garcia JIE AU - Pech-Canul MI AD - CINVESTAV, IPN, Saltillo 25000, Coahuila, MexicoSaratov State Tech Univ, Saratov 410054, RussiaGorokhovsky, A, CINVESTAV, IPN, AP 663, Saltillo 25000, Coahuila, Mexico TI - Glass-ceramic materials based on complex utilization of industrial wastes: structural features AB - Some typical schemes of pyroxene glass-ceramics manufacturing with a complex utilization of different industrial wastes in the same material were considered. The role of the combination of these admixtures in the crystallization processes was investigated with the modern research techniques. Even trough the synthesized materials were practically of the same chemical composition and differed only in the contents of admixtures, their structures were different. It was shown that the presence of different promoters provided an acceleration of the pyroxene glass crystallization process and influenced the type of the formed crystal structure MH - Mexico|Coahuila MH - Russia PB - FRANKFURT: VERLAG DEUTSCHEN GLASTECHNISCHEN RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0946-7475 UR - ISI:000166608300056 SO - Glass Science and Technology-Glastechnische Berichte 2000 ;73():374-377 837 UI - 14562 AU - Gorokhovsky A AU - Garcia JIE AU - Gorokhovsky V AD - IPN, CINVESTAV, Saltillo 25000, Coahuila, MexicoSaratov State Tech Univ, Saratov 410054, RussiaGorokhovsky, A, IPN, CINVESTAV, Car Saltillo Monterrey Km 13,Apartado Postal 663, Saltillo 25000, Coahuila, Mexico TI - Mechanical strength of float glass: test results analysis and the nature of differences AB - Mechanical strength of neat glasses manufactured by different enterprises with the same technological regimes and by one glass plant under different technological conditions was investigated relatively to the top (atmosphere) and bottom (tin) surfaces by means of the ring-on-ring bending method. The lack of statistical methods for estimating the technical strength of float glass was considered. It was shown that to obtain useful information about the mechanical properties of industrial sheet glass it is necessary to use a statistical interval of distribution of not more than 25 MPa with testing not less than 25 to 30 specimens. This will provide the means to analyze the information regarding the statistical levels of sheet glass strength. The levels of strength with average stresses at failure 56, 81, 138, 188 and 262 MPa were defined. The first two connected with the different abrasive actions can be eliminated by glass strengthening or glass surface protection. The existence of the last three levels of strength does not depend on conditions of manufacturing and methods of treatment (strengthening). The nature of these levels was connected with the existence of the lavers (fields) of chemical inhomogeneity characterized by different thickness. The disposition of initial microcracks inside the fields with different thickness can determine the glass specimens' failure stresses related to the different levels of mechanical strength MH - Mexico|Coahuila MH - Russia PB - FRANKFURT: VERLAG DEUTSCHEN GLASTECHNISCHEN RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0946-7475 UR - ISI:000166273300003 SO - Glass Science and Technology-Glastechnische Berichte 2000 ;73(11):344-350 838 UI - 14063 AU - Gorokhovsky AV AU - Matazov KN AD - CINVESTAV, Ctr Adv Studies, Natl Polytech Inst, Saltillo 25000, Coahuila, MexicoSaratov State Tech Univ, Saratov 410054, RussiaGorokhovsky, AV, CINVESTAV, Ctr Adv Studies, Natl Polytech Inst, Apartado Postal, Saltillo 25000, Coahuila, Mexico TI - Influence of glass mechanical strengthening on the adhesion properties of poly(vinyl butyral) films to a float glass surface AB - The effects of various methods of mechanical strengthening of glass on the adhesion properties of poly(vinyl butyral) (PVB) film to a float glass surface were investigated. The mechanisms of the influence of the strengthening processes on the adhesion properties were analyzed. The influence of different types of pretreatment of the glass surface on the adhesion of the polymer films was also considered. It was shown that ion-exchange strengthening followed by treatment with an alkaline water solution provided the best combination of high mechanical strength of glass and good adhesion of the PVB films to the glass surface. Metal-oxide coatings on float glass increased the mechanical strength of glass but decreased the adhesion strength between the polymer and glass. The adhesion of PVB to the metal-oxide layers was determined not only by the chemical composition of the layers, but also by the method of layers formation, the type of glass surface pretreatment, and the nature of the intermediate layer between the metal-oxide layer and the glass surface MH - Mexico|Coahuila MH - Russia PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical;Materials Science, Multidisciplinary;Mechanics U5 - J;Article AV - English IS - 0169-4243 UR - ISI:000167679500005 L2 - float glass;poly(vinyl butyral) films;adhesion;glass surface;thermochemical treatment;strengthening of glass SO - Journal of Adhesion Science and Technology 2000 ;14(13):1657-1664 839 UI - 16061 AU - Gorrochotegui-Escalante N AU - Munoz MD AU - Fernandez-Salas I AU - Beaty BJ AU - Black WC AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoUniv Autonoma Neuvo Leon, Fac Ciencias Biol, Lab Entomol Med, Monterrey, MexicoColorado State Univ, Dept Microbiol, Ft Collins, CO 80523, USAGorrochotegui-Escalante, N, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Genetic isolation by distance among Aedes aegypti populations along the northeastern coast of Mexico AB - A population genetic analysis of gene flow was conducted among 10 Aedes aegypti collections from seven cities along the northeastern coast of Mexico. Four collections were made from Monterrey to examine local patterns of gene flow. Markers included 60 random amplified polymorphic DNA (RAPD) loci amplified by the polymerase chain reaction and single strand conformation polymorphism analysis of variation in a 387-basepair region of the NADH dehydrogenase subunit 4 from the mitochondrial DNA (mtDNA). Seven mitochondrial haplotypes were detected and phylogenetic analysis identified two well-supported clades. Regression analysis of geographic distances and pairwise F-ST estimated from RAPD markers indicated that populations are isolated by distance and that free gene flow occurs among collections within 90-250 km. Isolation by distance was not detected using mtDNA haplotypes. The Nuevo Laredo collection had unique RAPD and mtDNA haplotype frequencies and reduced heterozygosity suggesting that few mosquitoes established this population MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 32 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000086864800008 L2 - MITOCHONDRIAL-DNA VARIATION; ANOPHELES-GAMBIAE COMPLEX; POLYMERASE CHAIN-REACTION; BREEDING STRUCTURE; OVIPOSITION SITES; ARBITRARY PRIMERS; MALARIA VECTORS; CONTROL REGION; PUERTO-RICO; MARKERS SO - American Journal of Tropical Medicine and Hygiene 2000 ;62(2):200-209 840 UI - 15152 AU - Gorsline DS AU - De Diego T AU - Nava-Sanchez EH AD - Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089, USAIPN, CICIMAR, La Paz 23000, BCS, MexicoGorsline, DS, Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089, USA TI - Seismically triggered turbidites in small margin basins: Alfonso Basin, Western Gulf of California and Santa Monica Basin, California Borderland AB - Box cores and gravity cores collected in Santa Monica Basin, California Continental Borderland, and in Alfonso Basin, western Gulf of California, contain turbidites, some of which can be traced over much of the respective basin floors. In Santa Monica Basin, at least six of these basin-wide hows have been deposited over the past four to five centuries. In Alfonso Basin, 9-10 basin-wide turbidites have been deposited over the past few millenia. Both Santa Monica and Alfonso Basins have anoxic conditions over the deep basin floors, which inhibit bioturbation and preserve primary laminations. These deposits have been dated using the Pb-210 and AMS C-14 methods, and varve counting so it is therefore possible to date the turbidites. Those that were deposited during historic time can be matched with major floods or earthquakes in the region. In Santa Monica Basin, turbidity currents can be generated directly from decadal major flood discharges, or by centennial slope failures triggered by major earthquake shocks. The hood-generated turbidites are typically a fifth or less of the volume of the earthquake-generated turbidites. In Alfonso Basin, the tributary coastal canyon discharges are small and have a high proportion of coarse-grained sand, which is trapped on the shelves, and cannot directly supply turbidite volumes of basin-wide magnitude. Thus the turbidites seen in that basin floor are probably produced by slope failures of silty clay deposits which were seismically generated. The distribution of the dated turbidites, and a slip face in one box core from the landward slope, indicates a source on the landward depositional slope of the fault-bounded basin. Similar discontinuities of the same age have been reported on the eastern side of the Gulf in the Guaymas area. In ancient basins, the criteria that may distinguish seismo-turbidites are areal extent and volume where those factors can be estimated. Basin-wide turbidites are probably seismically triggered. If paleogeographic data are sufficient to delineate basin form, then major turbidite volumes can also be estimated, These can be compared to average annual sediment-accumulation rates based on basin volume divided by basin age, as a means of determining potential minimum magnitudes of flood-generated volumes. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000089488500003 L2 - turbidites;seismo-turbidite;margin basins;California Borderland;Gulf of California;CONTINENTAL BORDERLAND; HUENEME; SYSTEMS; FAN SO - Sedimentary Geology 2000 ;135(1-4):21-35 841 UI - 14934 AU - Goulson D AU - Martinez AM AU - Hughes WOH AU - Williams T AD - Univ Southampton, Sch Biol Sci, Biodivers & Ecol Div, Southampton SO16 7PX, Hants, EnglandECOSUR, Tapachula 30700, Chiapas, MexicoGoulson, D, Univ Southampton, Sch Biol Sci, Biodivers & Ecol Div, Southampton SO16 7PX, Hants, England TI - Effects of optical brighteners used in biopesticide formulations on the behavior of pollinators AB - A patent has been granted for the formulation of baculoviruses with stilbene-derived optical brighteners, a group of compounds that absorb ultraviolet (UV) radiation and emit visible blue wavelengths. These compounds are being extensively tested for control of forest-feeding lepidopterous insects in North America; optical brighteners may thus become a common ingredient in commercial baculovirus formulations in the near future. Many flower species use UV signals to attract insects and to direct them to the nectaries. We examined a possible consequence of field applications of optical brighteners: their effects on the ability of pollinators to find and handle flowers. In field studies carried out in Mexico and the United Kingdom on three different flower species, application of dilute (0.1% or 1%) concentrations of the optical brightener Tinopal CBS reduced recruitment of bees to flowers. Bees that approached flowers were less likely to land and feed on flowers treated with Tinopal than on controls. On one plant species, Trifolium repens, the time taken for bees to handle inflorescences was longer following applications of Tinopal. It seems that this optical brightener may both reduce recruitment of insects to flowers and interfere with their ability to locate rewards. Field-scale applications could reduce pollination of crops, weeds, and wildflowers and adversely affect bee populations. These possibilities should be examined in more detail before widespread applications of these compounds to the environment are made. (C) 2000 Academic Press MH - United Kingdom MH - Mexico|Chiapas PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000165229100004 L2 - Bombus;Apis mellifera;Apoidea;Tinopal CBS;foraging;pollination;NUCLEAR POLYHEDROSIS-VIRUS; FALL ARMYWORM LEPIDOPTERA; GYPSY-MOTH LEPIDOPTERA; FLUORESCENT BRIGHTENER; FLOWERS; NUCLEOPOLYHEDROVIRUS; ULTRAVIOLET; INFECTIVITY; PROTECTANTS; VISITATION SO - Biological Control 2000 ;19(3):232-236 842 UI - 14601 AU - Govaerts J AU - Villanueva VM AD - Univ Catholique Louvain, Inst Phys Nucl, B-1348 Louvain, BelgiumUniv Guanajuato, Inst Fis, Leon 37150, MexicoGovaerts, J, Univ Catholique Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium TI - Topology classes of flat U(1) bundles and diffeomorphic covariant representations of the Heisenberg algebra AB - The general construction of self-adjoint configuration space representations of the Heisenberg algebra over an arbitrary manifold is considered. All such inequivalent representations are parametrized in terms of the topology classes module integer holonomies of flat; U(1) bundles over the configuration space manifold. In the case of Riemannian manifolds, these representations are also manifestly diffeomorphic covariant. The general discussion, illustrated by some simple examples in nonrelativistic quantum mechanics, is of particular relevance to systems whose configuration space is parametrized by curvilinear coordinates or is not simply connected, which thus include for instance the modular spaces of theories of non-Abelian gauge fields and gravity MH - Belgium MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000166136500002 L2 - AXIS HYPERSPHERICAL DESCRIPTION; N-PARTICLE SYSTEMS; GAUGE; QUANTIZATION SO - International Journal of Modern Physics A 2000 ;15(31):4903-4931 843 UI - 15398 AU - Grageda-Cabrera OA AU - Esparza-Garcia F AU - Zapata F AU - Pena-Cabriales JJ AD - IPN, CINVESTAV, Dpto Biotecnol & Bioquim, Unidad Irapuato, Irapuato, Gto, MexicoIPN, CINVESTAV, Dpto Biotecnol & Bioingn, Mexico City 07738, DF, MexicoInt Atom Energy Agcy, FAO, Div Nucl Tech Food & Agr, A-1400 Vienna, AustriaPena-Cabriales, JJ, IPN, CINVESTAV, Dpto Biotecnol & Bioquim, Unidad Irapuato, Apdo Postal 629, Irapuato, Gto, Mexico TI - Influence of sorghum crop residue management on the recovery of N-15 labelled fertilizer by wheat in Mexico AB - "El Bajio" (ca. 5 x 10(5) ha) is one of the main cereal producing regions of Mexico. During the past 30 years, a cereal-cereal rotation has been practiced with constantly increasing annual rates of N-fertilizer application: from 120 kg N ha(-1) in 1960 to 320 kg N ha(-1) in 1998. Furthermore, in order to avoid overlap between the fall-winter and spring-summer cycles, crop residues are burned. A field experiment was conducted in Abasolo, Guanajuato, Mexico, to compare the effects of incorporating or burning sorghum crop residues on the availability of fertilizer N for a succeeding crop of winter wheat. The wheat received 320 kg N ha(-1), either all applied at sowing or in two split applications of 160 kg each (at sowing and at 50 days after sowing), as ammonium sulphate enriched in N-15. I,,parallel experiment, a fertilizer N balance was carried out using a single application at sowing of 320 kg N ha(-1) as ammonium sulphate enriched in N-15. Dry matter and grain yields obtained ranged from 4 to 6 t ha(-1) for dry matter and from 4.1 to 6.1 for grain, which are normal for this region. Wheat total-N uptake was 46 kg N ha(-1) higher with the burned residue than with the incorporated residue. The values of %N in the plant derived from fertilizer were not significantly affected by residue treatment (%NdFf 25 to 28). The fraction of plant N derived from soil (Ndfs) was 72 to 75% for both residue treatments. Higher recoveries (25 to 49 kg N ha(-1)) of fertilizer N were observed when it was applied in two applications. Higher values were registered with burned residues. More fertilizer N was found in the surface 30-cm layer (102 kg N ha(-1)) with incorporated residues vs. burned residues (30 kg N ha(-1)). From 30 to 90 cm, 67 to 80 kg N (25% of the applied fertilizer N) was observed regardless of residue treatment. Other factors, which are under study, such as poor water management in this region seem to play a role in the low N fertilizer efficiency observed MH - Austria MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - BINGHAMTON: HAWORTH PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 1044-0046 UR - ISI:000088905100005 L2 - nitrogen;N-15;N efficiency;N-balance;wheat;crop residues;FURROW IRRIGATION; UREA NITROGEN; GRAIN-SORGHUM; SOIL SO - Journal of Sustainable Agriculture 2000 ;16(3):75-91 844 UI - 16286 AU - Graham VV AU - Sutter G AU - Jose MV AU - Garcia-Carranca A AU - Erfle V AU - Mendoza NM AU - Merchant H AU - Rosales R AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol, Mexico City 04510, DF, MexicoGSF Forschungszentrum Umwelt & Gesundheit, Inst Mol Virol, Neuherberg, GermanyUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biophys & Biomath, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Cell Biol, Mexico City 04510, DF, MexicoRosales, R, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol, Apto Postal 70228,Cd Univ, Mexico City 04510, DF, Mexico TI - Human tumor growth is inhibited by a vaccinia virus carrying the E2 gene of bovine papillomavirus AB - BACKGROUND. Papillomavirus is the etiologic agent associated with cervical carcinoma. The papilloma E2 protein is able to regulate negatively the expression of E6 and E7 papilloma oncoproteins. Therefore, a new highly attenuated vaccinia virus known as modified vaccinia virus Ankara (MVA), which carries the papillomavirus E2 gene, was used for the treatment of tumors associated with human papillomavirus. METHODS. Analysis of expression of the E2 gene from the recombinant vaccinia virus was performed by reverse transcription-polymerase chain reaction of RNA isolated from infected cells. Detection of the E2 protein was done by immunoprecipitation from proteins labeled with [S-35]-methionine, isolated from infected cells. The therapeutic effect of the MVA E2 recombinant virus over human tumors was tested in nude mice bearing tumors generated by inoculation of HeLa cells. Series of 10 nude mice with tumors of different sizes were injected with MVA, MVA E2, or phosphate-buffered saline. Tumor size was monitored every week to assess growth. RESULTS. The MVA E2 recombinant virus efficiently expressed the E2 protein in BS-C-I cells. This protein was able to repress, in vivo, the papillomavirus P105 promoter, which controls the expression of the EG and E7 oncoproteins. In nude mice the MVA E2 virus reduced tumor growth very efficiently. In contrast, tumors continued to grow in mice treated with MVA or PBS. The Life expectancy of MNA E2-treated mice was also increased three- to fourfold compared with that of animals that received MVA or PBS. CONCLUSIONS. The growth of human turners was efficiently inhibited by the MVA E2 recombinant vaccinia virus. The absence of side effects in treated animals suggested that the MVA E2 virus is a safe biologic agent that could in the future be used in humans for the treatment of cervical carcinoma. (C) 2000 American Cancer Society MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 10 U4 - Oncology U5 - J;Article AV - English IS - 0008-543X UR - ISI:000086212300020 L2 - papillomavirus;vaccinia virus;MVA strain;cervical carcinoma;CERVICAL-CANCER; RECOMBINANT VACCINIA; RISK-FACTORS; CELL-LINES; TYPE-16; PROTEIN; DNA; CARCINOMA; PATTERNS; E7 SO - Cancer 2000 ;88(7):1650-1662 845 UI - 16280 AU - Grajales-Nishimura JM AU - Cedillo-Pardo E AU - Rosales-Dominguez C AU - Moran-Zenteno DJ AU - Alvarez W AU - Claeys P AU - Ruiz-Morales J AU - Garcia-Hernandez J AU - Padilla-Avila P AU - Sanchez-Rios A AD - Inst Mexicano Petr, Subdirecc Explorac & Prod, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Inst Geol, Dept Geoquim, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Geol & Geophys, Berkeley, CA 94720, USAMuseum Naturkunde, D-10099 Berlin, GermanyPEMEX Explorac & Prod, Reg Marina Noreste, Campeche, MexicoGrajales-Nishimura, JM, Inst Mexicano Petr, Subdirecc Explorac & Prod, Mexico City 07730, DF, Mexico TI - Chicxulub impact: The origin of reservoir and seal facies in the southeastern Mexico oil fields AB - Stratigraphic and mineralogic studies of Cretaceous-Tertiary (K-T) boundary sections demonstrate that the offshore oil-producing breccias and seals from oil fields in the Campeche marine platform are of K-T boundary age and that their mode of formation is probably related to the K-T impact event at Chicxulub. The oil-producing carbonate breccia and the overlying dolomitized ejecta layer (seal) found in several wells on the Campeche marine platform contain typical Chicxulub impact products, such as shocked quartz and plagioclase, and altered glass. These offshore units are correlated with thick (similar to 50-300 m) onshore breccia and impact ejecta layers found at the K-T boundary in the Guayal (Tabasco) and Bochil (Chiapas) sections. Regionally the characteristic sequence is composed of, from base to top, coarse-grained carbonate breccia covered by an ejecta bed and typical K-T boundary clay. The onshore and offshore breccia sequences are Likely to have resulted from major slumping of the carbonate platform margin triggered by the Chicxulub impact. Successive arrival times in this area, similar to 350-600 km from the crater, of seismic shaking, ballistic ejecta, and tsunami waves fit the observed stratigraphic sequence. The K-T breccia reservoir and seal ejecta layer of the Cantarell oil held, with a current daily production of 1.3 million barrels of oil, are probably the most important known oil-producing units related to an impact event MH - Germany MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 23 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000086229800005 L2 - K-T boundary;Chicxulub;carbonate breccia;oil reservoir;Mexico;CRETACEOUS-TERTIARY BOUNDARY SO - Geology 2000 ;28(4):307-310 846 UI - 16412 AU - Granich RM AU - Balandrano S AU - Santaella AJ AU - Binkin NJ AU - Castro KG AU - Marquez-Fiol A AU - Anzaldo G AU - Zarate M AU - Jaimes ML AU - Velazquez-Monroy O AU - Salazar L AU - varez-Lucas C AU - Kuri P AU - Flisser A AU - Santos-Preciado J AU - Ruiz-Matus C AU - Tapia-Conyer R AU - Tappero JW AD - Ctr Dis Control & Prevent, Div TB Eliminat, Natl Ctr HIV STD & TB Prevent, Atlanta, GA 30333, USAInst Nacl Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoBinkin, NJ, Ctr Dis Control & Prevent, Epidemiol Sect, Div Bacterial & Mycot Dis, Meningitis & Special Pathogens Branch, 1600 Clifton Rd NE,Mailstop C-09, Atlanta, GA 30333 USA TI - Survey of drug resistance of Mycobacterium tuberculosis in 3 Mexican states, 1997 AB - Background: Drug resistance threatens global tuberculosis (TB) control efforts. Population-based estimates of drug resistance are needed to develop strategies for controlling drug-resistant TB in Mexico. Objective: To obtain population-based data on Mycobacterium tuberculosis drug resistance in Mexico. Methods: To obtain drug resistance data, we conducted a population-based study of TB cases in the states of Baja California, Sinaloa, and Oaxaca, Mexico. We performed cultures and drug susceptibility testing on M tuberculosis isolates from patients with newly diagnosed, smear-positive TB from April 1 to October 31, 1997. Results: Mycobacterium tuberculosis was isolated from 460 (75%) of the 614 patients. Levels of resistance in new and retreatment TB cases to 1 or more of the 3 current first-line drugs used in Mexico (isoniazid, rifampin, and pyrazinamide) were 12.9% and 50.5%, respectively; the corresponding levels of multi-drug-resistant TB were 2.4% and 22.4%. Retreatment cases were significantly more likely than new cases to have isolates resistant to 1 or more of the 3 first-line drugs (relative risk [RR], 3.9; 95% confidence interval ICI], 2.8-5.5), to have isoniazid resistance (RR, 3.6; 95% CI, 2.5-5.2), and to have multidrug-resistant TB (RR, 9.4; 95% CI, 4.3-20.2). Conclusions: This population-based study of M tuberculosis demonstrates moderately high levels of drug resistance. Important issues to consider in the national strategy to prevent M tuberculosis resistance in Mexico include consideration of the most appropriate initial therapy in patients with TB, the treatment of patients with multiple drug resistance, and surveillance or periodic surveys of resistance among new TB patients to monitor drug resistance trends MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 12 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0003-9926 UR - ISI:000085808300007 L2 - PULMONARY TUBERCULOSIS; UNITED-STATES; INFECTION SO - Archives of Internal Medicine 2000 ;160(5):639-644 847 UI - 15479 AU - Greenberg R AU - Bichier P AU - Angon AC AD - Smithsonain Migratory Bird Ctr, Washington, DC 20008, USAInst Ecol, Xalapa, Veracruz, MexicoGreenberg, R, Smithsonain Migratory Bird Ctr, Natl Zool Pk, Washington, DC 20008 USA TI - The conservation value for birds of cacao plantations with diverse planted shade in Tabasco, Mexico AB - We surveyed birds in cacao (Theobroma cacao) plantations in the state of Tabasco, Mexico. The shade canopy was planted by farmers and consisted of approximately 60 species of trees with no single dominant species. Canopy height averaged 15 m and the structure was multi-storied. We conducted 220 ten minute, 25 m radius point counts for birds and detected 1550 individuals from 81 species. The average number of birds/point and the expected diversity in a fixed number of individuals within the cacao surveyed were well within the range of other lowland habitats, including agricultural sites, that we have surveyed previously in neighbouring Chiapas. In the Tabascan cacao, the migrant group was composed, in part, of forest species, and dimorphic species were represented primarily by males, which in other areas are known to dominate forest or forest-like habitats. In contrast to the composition of migrant species, we found few resident forest specialists in Tabascan cacao. Instead, the tropical resident group was composed of large-bodied generalist species that use small patches of trees in open habitats. These results (moderate diversity, low numbers of forest specialists) differ from the few studies completed in 'rustic' cacao systems located near large tracts of forest. The planted shade cacao agroecosystem - at least in the absence of nearby forest - may have a limited value for conserving lost tropical forest bird diversity, but it provides habitat for woodland-associated migratory species. Our results also indicate that the planted shade cacao plantations supported few small omnivorous or frugivorous species, probably because cacao itself, as well as the dominant shade trees, produce primarily mammal or wind dispersed fruit and seeds MH - USA MH - Mexico|Veracruz PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 44 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1367-9430 UR - ISI:000088757200003 L2 - LOS-TUXTLAS; COFFEE PLANTATIONS; LANDSCAPE CHANGES; COCOA FARMS; FOREST; POPULATIONS; ABUNDANCE; CHIAPAS SO - Animal Conservation 2000 ;3():105-112 848 UI - 14849 AU - Greiner J AU - Schwarz R AU - Zharikov S AU - Orio M AD - Inst Astrophys, D-14482 Potsdam, GermanySpecial Astrophys Observ, Nizhnij Arkhyz 357147, RussiaUNAM, Inst Astron, PAM, Ensenada, Baja California, MexicoOsservatorio Astron Torino, I-10125 Pino Torineso, TO, ItalyUniv Wisconsin, Dept Phys, Madison, WI 53706, USAGreiner, J, Inst Astrophys, Sternwarte 16, D-14482 Potsdam, Germany TI - RX J1420.4+5334 - another tidal disruption event? AB - We have discovered a transient X-ray source, RXJ1420.4+5334, which displays a ROSAT flux variation of greater than or similar to 150 between the ROSAT All-Sky-Survey in 1990 and a preceding pointed ROSAT observations in July 1990. Optical observations suggest a non-active galaxy as the only visible counterpart. We therefore tentatively identify RXJ1420.4+5334 as a tidal disruption event in a non-active galaxy MH - Germany MH - Italy MH - Mexico|Baja California MH - Russia MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000165455100007 L2 - accretion, accretion disks;galaxies : active;galaxies : individual :;galaxies : nuclei;X-rays : galaxies;CENTRAL BLACK-HOLES; X-RAY OUTBURST; GALAXY; NGC-5905; SYSTEMS; GIANT; STARS SO - Astronomy and Astrophysics 2000 ;362(2):L25-L28 849 UI - 16513 AU - Greiner J AU - Hartmann DH AU - Voges W AU - Boller T AU - Schwarz R AU - Zharikov SV AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyClemson Univ, Dept Phys & Astron, Clemson, SC 29634, USAMPI Extraterr Phys, D-85740 Garching, GermanySpecial Astrophys Observ, Nizhni Arkhyz 357147, RussiaUNAM, Inst Astron, Ensenada 22860, Baja California, MexicoGreiner, J, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - Search for GRB X-ray afterglows in the ROSAT all-sky survey AB - We describe a search for X-ray afterglows from gamma-ray bursts using the ROSAT all-sky survey (RASS) data. If the emission in the soft X-ray band is significantly less beamed than in the gamma-ray band, we expect to detect many afterglows in the RASS. Our search procedure generated 23 afterglow candidates, where about 4 detections are predicted. However, follow-up spectroscopy of several counterpart candidates strongly suggests a flare star origin of the RASS events in many, if not all, cases. Given the small number of events we conclude that the ROSAT survey data are consistent with comparable beaming angles in the X-ray and gamma-ray bands. This result is perhaps not surprising, given that the data constrain the relative beaming fraction only within a few hours of the burst. However, models predicting a large amount of energy emerging as a nearly isotropic X-ray component of the early afterglow are severely constrained by the ROSAT data. In particular, a so far undetected class of "dirty fireballs" and delayed "rebursts" are constrained MH - Germany MH - Mexico|Baja California MH - Russia MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000085382600025 L2 - gamma rays : bursts;X-rays : general;stars : flare;BURSTS; BEPPOSAX; STAR SO - Astronomy & Astrophysics 2000 ;353(3):998-1008 850 UI - 15855 AU - Grevers G AU - Palacios OA AU - Rodriguez B AU - Abel S AU - van Aubel A AD - Univ Munich, Dept Otorhinolaryngol Head & Neck Surg, D-81377 Munich, GermanyCent Univ Venezuela, Dept Immunol, Caracas, VenezuelaMexicana Air Lines, Med Serv, Mexico City, DF, MexicoSankyo Pharma GMBH, Munich, GermanyGrevers, G, Univ Munich, Dept Otorhinolaryngol Head & Neck Surg, Marchioninistr 15, D-81377 Munich, Germany TI - Treatment of recurrent respiratory tract infections with a polyvalent bacterial lysate: Results of an open, prospective, multinational study AB - This multicenter, open study, carried out in 14 countries in Europe, Latin America, and Asia, recruited 4965 patients suffering from recurrent;respiratory tract infections to investigate the safety and acceptability of the oral bacterial lysate immunomodulator LW 50020. Patients remained in the study for 4 months (two 4-week courses of LW 50020 separated by a 28-day treatment-free interval and follow-up). The incidence of all adverse events was 7.2%; that of adverse drug reactions was 0.6%. Adverse drug reactions were mild to moderate and not more frequent in the large subgroup of patients (77%) with a known history of allergies or underlying respiratory diseases; however, the incidence of adverse events in this subgroup was twofold higher than in the study population as a whole, probably indicating a generally increased vulnerability to disease. No clinically relevant changes in laboratory variables followed treatment. Comparison of the first study period (first course of LW 50020 and drug-free interval) with the second study period (second course of LW 50020 and follow-up) showed an overall reduction of at least 50% in the number, severity, and duration of respiratory tract infections, the number of antibiotic and symptomatic treatments, and the number of days absent from school or work. Tolerability and acceptability were assessed as good or very good in 99% of patients who completed the study MH - Germany MH - Mexico|Distrito Federal MH - Venezuela PB - EDISON: HEALTH COMMUNICATIONS INC RP - NOT IN FILE U3 - TC 7 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0741-238X UR - ISI:000087740500006 L2 - recurrent respiratory tract infections;oral immunostimulation;bacterial lysate;safety study;large-scale study;CHRONIC-BRONCHITIS; ORAL IMMUNIZATION; OTITIS-MEDIA; RISK-FACTORS; ASTHMA; EPISODES; DISEASE; ILLNESS SO - Advances in Therapy 2000 ;17(2):103-116 851 UI - 14888 AU - Grim JN AU - Perez-Espana H AU - Martinez-Diaz SF AD - No Arizona Univ, Dept Sci Biol, Flagstaff, AZ 86011, USACtr Ecol Costera, Jalisco 48980, MexicoCICMAR, IPN, La Paz 23000, BCS, MexicoGrim, JN, No Arizona Univ, Dept Sci Biol, Flagstaff, AZ 86011, USA TI - The morphology of Protoopalina pomacantha, n. sp., symbiont in the rectum of the angelfishes, Pomacanthus zonipectus and Holacanthus passer. A light, scanning electron and transmission electron microscopic study AB - Protoopalina pomacantha n. sp, were discovered with fecal debris from the large hind gut chamber (rectum) of the Angelfishes, Pomacanthus zonipectus, and Holacanthus passer, collected from the Sea of Cortez near La Gaviota Island, Mexico. To describe this species, specimens from each host were studied with both light and electron microscopy, It is generally similar to other fish inhabiting protoopalines. The body is curved, contains a small anterior fair, and a pointed posterior end-barren of flagella. It has desmose fibrils interconnecting kinetosomes and electron dense substance within kinetosomes. The form of it's somatic kinetosomal desmose is similar to at least one species of the genus, Protoopalina, but differs from several. The fair kinetosomal and desmose ultrastructure is similar to several opalinids, This is judged to be a new species based on its host, components within the kinetosomal lumen, and desmose structures. Bacterial ectosymbionts are often found attached, in shallow pits, within a kinety and between flagella MH - Mexico|Baja California Sur MH - Mexico|Jalisco MH - USA PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Microbiology U5 - J;Article AV - English IS - 0932-4739 UR - ISI:000165272700009 L2 - Protoopalina;ectobiotic-bacteria;kineties;new species;ultrastructure;OPALINIDS; PSEUDONUTTI; AMPHIBIA; ANURA SO - European Journal of Protistology 2000 ;36(3):343-350 852 UI - 16382 AU - Grobert N AU - Terrones' M AU - Trasobares S AU - Kordatos K AU - Terrones H AU - Olivares J AU - Zhang JP AU - Redlich P AU - Hsu WK AU - Reeves CL AU - Wallis DJ AU - Zhu YQ AU - Hare JP AU - Pidduck AJ AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Queretaro 76000, Qro, MexicoMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUniv Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USADef Evaluat & Res Agcy, Malvern WR14 3PS, Worcs, EnglandGrobert, N, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - A novel route to aligned nanotubes and nanofibres using laser-patterned catalytic substrates AB - We describe the generation of aligned carbon nanotube bundles and films by pyrolysis of solid organic precursors (for example 2-amino-4,6-dichloro-s-triazine,s-triamino-triazine) at 950-1050 degrees C over laser-patterned thin metal (Fe, Co, Ni) films, deposited on silica substrates. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies reveal that surface roughness of the laser-etched catalytic substrates plays a key role in achieving control of nanotube growth. We believe that, during the etching process, the energised (ablated) metal clusters condense and recrystallise evenly, possibly as the metal oxide, within the edges or surface of the eroded regions. During pyrolysis these catalytic particles, embedded in the silica substrates, are responsible for carbon agglomeration and subsequent tube axial growth, suggesting that nanotube alignment strongly depends upon the etching conditions (for example laser power, pulse duration, and focal distance). The pyrolysed products (usually nanotubes or nanofibres) were characterised by SEM, high-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS) and energy dispersive X-ray spectroscopy (EDX). Samples containing only small amounts of amorphous carbon and other carbonaceous particles are notably absent. We observe that the degree of graphitisation is dependent upon the catalyst and the organic precursor. Interestingly, a nitrogen content less than or equal to 7% was detected within the nanofibres, which exhibit corrugated graphite-like morphologies. This pyrolytic method may be used to advantage in generating aligned heteroatomic nanostructures such as BxCyNz systems MH - United Kingdom MH - Germany MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 39 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000085952800008 L2 - INDIVIDUAL CARBON NANOTUBES; BORON-NITRIDE NANOTUBES; ELECTRON-MICROSCOPY; GRAPHITIC CARBON; FIELD-EMISSION; MECHANISM; NITROGEN; TUBES; FILMS SO - Applied Physics A-Materials Science & Processing 2000 ;70(2):175-183 853 UI - 14768 AU - Gross BD AU - Sacristan E AU - Peura RA AU - Shahnarian A AU - Devereaux D AU - Wang HL AU - Fiddian-Green R AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoWorcester Polytech Inst, Worcester, MA 01609, USAAgilent Technol, Patient Monitoring Div, Andover, MA, USAUniv Massachusetts, Med Ctr, Worcester, MA, USASacristan, E, Univ Autonoma Metropolitana Iztapalapa, Col Vicentina Iztapalapa, Mexico City 09340, DF, Mexico TI - Supplemental systemic oxygen support using an intestinal intraluminal membrane oxygenator AB - An intraluminal membrane oxygenator (IMO) prototype was surgically inserted in the ileum and evaluated as a method of supporting systemic oxygenation in an acutely hypoxemic porcine model. Animals were assigned randomly to the test (n = 12) or the control (n = 8) groups, which underwent identical protocols with the exception of the O-2 flow in the IMO device, which was shut off in the control group. In each case, hypoxia was induced by a reduction in the inspired oxygen fraction (Fio(2)) to 0.14. A highly significant improvement (p < 0.005) in arterial and venous O-2 content and lower arteriovenous O-2 difference (p < 0.05), cardiac output, and hemoglobin (p < 0.005) were found in the test group during hypoxia. The results show that it is possible to meet a physiologically significant portion of the body's O-2 demands via the intestine during respiratory hypoxia and suggests that similar devices may be of significant potential value as a supplemental oxygenation device in cases of respiratory distress MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Biomedical;Transplantation U5 - J;Article AV - English IS - 0160-564X UR - ISI:000165720400005 L2 - artificial lung;respiratory distress;splanchnic ischemia;tonometry;intestinal oxygenation;respiratory assist device;ISCHEMIA SO - Artificial Organs 2000 ;24(11):864-869 854 UI - 15964 AU - Grotjahn DB AU - Combs D AU - Van S AU - Aguirre G AU - Ortega F AD - San Diego State Univ, Dept Chem, San Diego, CA 92182, USACtr Graduados & Invest, Inst Technol Tijuana, Tijuana 22000, Baja California, MexicoGrotjahn, DB, San Diego State Univ, Dept Chem, 5500 Campanile Dr, San Diego, CA 92182 USA TI - Synthesis and structure of isomeric palladium(II)-pyrazole chelate complexes with and without an N-H group as hydrogen bond donor AB - Four new ligands containing a pyrazole ring and either a phosphine or thioether were prepared and converted to their cis-dichloropalladium(II) complexes. Two of the ligands are especially notable for the attachment of a side chain at pyrazole carbon, rather than at nitrogen. The new metal complexes include dichloro[3-(diphenylphosphinomethyl)pyrazole]palladium(II) (1-PdCl2) and dichloro[3-(methylthiomethyl)pyrazole]palladium(II) (2-PdCl2), which both feature an N-H group as a potential proton or hydrogen bond donor. For comparison, isomeric complexes lacking an NH group were prepared: dichloro[1-(diphenylphosphinomethyl)pyrazole]palladium(II) (3-PdCl2) and dichloro[1-(methylthiomethyl)pyrazole]palladium(II) (4-PdCl2). As determined by X-ray crystallography, all four complexes were found to have slightly distorted square planar geometry. Complexes 1-PdCl2 and 2-PdCl2, which contain an NH group, exhibit both intermolecular and intramolecular hydrogen bonding, whereas isomers 3-PdCl2 and 4-PdCl2 do not. Single-crystal X-ray structure determinations on the following compounds are reported: 1-PdCl2, space group P (1) over bar, a = 8.4488(9) Angstrom, b = 8.9175(13) Angstrom, c = 12.731(2) Angstrom, Z = 2, V = 871.8(2) Angstrom(3); 2-PdCl2, space group Pbca, a = 10.8827(10) Angstrom, b = 11.7721(7) Angstrom, c = 14.874(2) Angstrom, Z =8, V = 1905.6 Angstrom(3); 3-PdCl2, space group p2(1)/c, a = 20.520(2) Angstrom, b = 12.549(2) Angstrom, c = 13.9784(13) Angstrom, Z = 8, V = 3401.1(6) Angstrom(3); 4-PdCl2, space group Pbca, a = 10.6545(10) Angstrom, b = 12.0205(11) Angstrom, c = 14.6474(14) Angstrom, Z = 8, V = 1875.9(3) Angstrom(3) MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000087124000012 L2 - METAL-IONS; PHOSPHODIESTER HYDROLYSIS; REACTIVITY; CATALYSTS; IMIDAZOLE; PENDANT; LIGAND; MODEL; DIHYDROGEN; PYRAZOLE SO - Inorganic Chemistry 2000 ;39(10):2080-2086 855 UI - 15374 AU - Grove K AU - Searle C AD - Univ Maryland, Dept Math, College Pk, MD 20742, USAUNAM, Inst Matemat, Cuernavaca, Morelos, Mexico TI - Global G-manifold reductions and resolutions AB - The purpose of this note is to exhibit some simple and basic constructions for smooth compact transformation groups, and some of their most immediate applications to geometry MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Mathematics U5 - J;Article AV - English IS - 0232-704X UR - ISI:000089053200015 L2 - curvature;fixed points;homogeneous spaces;transformation groups;reductions;resolutions SO - Annals of Global Analysis and Geometry 2000 ;18(3-4):437-446 856 UI - 14922 AU - Gruart A AU - Guillazo-Blanch G AU - Fernandez-Mas R AU - Jimenez-Diaz L AU - gado-Garcia JM AD - Univ Pablo Olavide, Lab Andaluz Biol, Div Neurociencias, Seville 41013, SpainUniv Autonoma Barcelona, Fac Psicol, Dept Psicobiol & Metodol Ciencies Salut, E-08193 Barcelona, SpainInst Mexicano Psiquiatria, Div Neurociencias, Mexico City 14370, DF, MexicoDelgado-Garcia, JM, Univ Pablo Olavide, Lab Andaluz Biol, Div Neurociencias, Ctra Utrera,Km 1, Seville 41013, Spain TI - Cerebellar posterior interpositus nucleus as an enhancer of classically conditioned eyelid responses in alert cats AB - Cerebellar posterior interpositus neurons were recorded in cats during delayed and trace conditioning of eyeblinks. Type A neurons increased their firing in the time interval between conditioned and unconditioned stimulus presentations for both paradigms, while type B neurons decreased it. The discharge of different type A neurons recorded across successive conditioning sessions increased, with slopes of 0.061-0.078 spikes/ s/trial. Both types of neurons modified their firing several trials in advance of the appearance of eyelid conditioned responses, but for each conditioned stimulus presentation their response started after conditioned response onset. Interpositus microstimulation evoked eyelid responses similar in amplitude and profiles to conditioned responses, and microinjection of muscimol decreased conditioned response amplitude. It is proposed that the interpositus nucleus is an enhancer, but not the initiator, of eyelid conditioned responses MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Neurosciences;Physiology U5 - J;Article AV - English IS - 0022-3077 UR - ISI:000165161200046 L2 - NICTITATING-MEMBRANE; REFLEX; MEMORY; ORGANIZATION; MOVEMENTS; DISCHARGE; MOTONEURONS; PONTINE; NEURONS; CORTEX SO - Journal of Neurophysiology 2000 ;84(5):2680-2690 857 UI - 16306 AU - Grunwald NJ AU - Rubio-Covarrubias OA AU - Fry WE AD - PICTIPAPA, Cornell Eastern Europe Mexico Potato Late Blight, Conjunto Sedagro, Metepec 52142, Mexico, MexicoCornell Univ, Dept Plant Pathol, Ithaca, NY 14853, USAInst Nacl Invest Forestales Agr & Pecuarias, Conjunto Sedagro, Metepec 52142, Mexico, MexicoGrunwald, NJ, PICTIPAPA, Cornell Eastern Europe Mexico Potato Late Blight, Conjunto Sedagro, Metepec 52142, Mexico, Mexico TI - Potato late-blight management in the Toluca Valley: Forecasts and resistant cultivars AB - We evaluated host resistance and fungicide forecasting as components of integrated management in the Toluca Valley of central Mexico. Potato cvs. Rosita and Nortena showed high levels of resistance (20 and 4% final disease severity, respectively) in the no-spray controls, whereas susceptible cv. Alpha was at 90% defoliation well before the end of the season. Disease on Alpha was well managed with a weekly spray of chlorothalonil. None of three published forecast systems was entirely appropriate far this pathosystem. SIM-CAST accurately allocated fungicide for a susceptible cultivar but needs to be adapted for the high level of resistance of Rosita and Nortena. TOM-CAST and BLITECAST did not recommend the initial fungicide application until after disease was well established in the plots. We believe that the low-temperature response of Phytophthora infestans needs to be reevaluated for the highland tropics MH - Mexico|Estado De Mexico MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000085994700005 L2 - epidemiology;yield loss;PHYTOPHTHORA-INFESTANS; FUNGICIDE APPLICATIONS; HOST-RESISTANCE; BLITECAST SO - Plant Disease 2000 ;84(4):410-416 858 UI - 16470 AU - Grunwald NJ AU - Hu S AU - van Bruggen AHC AD - Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616, USAPICTIPAPA, Cornell Univ, Metepec 52142, Mexico, MexicoGrunwald, NJ, Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616, USA TI - Short-term cover crop decomposition in organic and conventional soils: Characterization of soil C, N, microbial and plant pathogen dynamics AB - Stages of oat-vetch cover crop decomposition were characterized over time in terms of carbon and nitrogen cycling, microbial activity and damping-off pathogen dynamics in organically and conventionally managed soils in a field and a controlled incubation experiment. A measurement of relative growth consisting of radial growth of a fungal colony over non-sterilized soil divided by that over sterilized soil was used as an assay of suppressiveness. No differences in relative growth of Pythium aphanidermatum and Rhizoctonia solani were detected between organic and conventionally managed soils amended with cover crop residue. Significant effects of cover crop decomposition stage on the relative growth of both pathogens were obtained. Relative growth of P. aphanidermatum was highest just after incorporation and decreased 3 weeks after incorporation. Relative growth of R. solani was highest about 20 days after incorporation, and decreased 2 weeks later in the organic system, but continued to increase in the conventional system. In both experiments, the N or C content, C:N ratio or dry weight of retrieved debris were significantly correlated with relative growth of P. aphanidermatum. Relative growth of R. solani was significantly correlated with the C:N ratio of soil or the C or N content of debris. Microbial activity was not consistently associated with relative growth of either pathogen MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 16 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0929-1873 UR - ISI:000085554000005 L2 - carbon;cellulose;cover crop;damping-off;discriminant analysis;lignin;nitrogen;PYTHIUM DAMPING-OFF; FLUORESCEIN DIACETATE; FARMING SYSTEMS; POTTING MIXES; CORKY ROOT; NITROGEN; BIOMASS; SUPPRESSION; SEVERITY; TOMATOES SO - European Journal of Plant Pathology 2000 ;106(1):37-50 859 UI - 16471 AU - Grunwald NJ AU - Hu S AU - van Bruggen AHC AD - Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616, USAGrunwald, NJ, PICTIPAPA, Cornell Univ, Apto Postal 2-12, Metepec 52142, Mexico TI - Short-term cover crop decomposition in organic and conventional soils: Soil microbial and nutrient cycling indicator variables associated with different levels of soil suppressiveness to Pythium aphanidermatum AB - Stages of oat-vetch cover crop decomposition were characterized over time in terms of carbon and nitrogen cycling, microbial activity and community dynamics in organically and conventionally managed soils in a field experiment and a laboratory incubation experiment. We subsequently determined which variables describing soil microbial community dynamics, C and N cycling could be used as predictors of Pythium aphanidermatum damping-off incidence and relative growth. Disease incidence and relative growth of P. aphanidermatum were measured in growth chamber assays and in vitro growth tests. No significant differences were detected between the conventional and organic farming system with respect to either relative growth or disease incidence. Stepwise discriminant analysis on three classes of disease incidence or relative growth led to selection of qualitatively similar variables. Only one soil microbial variable, total biomass of actinomycetes, was selected. Total C and N content of debris extracted from soil as well as NH4-N content of soil were selected most consistently and show promise for assessment of potential damping-off incidence by P. aphanidermatum for young seedlings MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0929-1873 UR - ISI:000085554000006 L2 - actinomycetes;bacteria;C : N ratio;decomposition rate constant;FDA hydrolytic activity;fungi;microbial activity;DAMPING-OFF; ROOT-ROT; EXTRACTION METHOD; CONTAINER MEDIA; QUALITY; ULTIMUM; YIELD; BIOINDICATORS; INVERTEBRATES; PHILIPPINES SO - European Journal of Plant Pathology 2000 ;106(1):51-65 860 UI - 16495 AU - Gu H AU - Chang CM AU - Barrera-Godinez JA AU - O'Keefe TJ AD - Univ Missouri, Dept Engn Met, Rolla, MO 65401, USAUniv Missouri, Ctr Mat Res, Rolla, MO 65401, USAMINTEQ Int Inc, Easton, PA, USAUNAM, Fac Quim, Ed D Cto Inst, Mexico City, DF, Mexico TI - Preliminary design of a solvent extraction process for the galvanic stripping of iron from D2EHPA AB - The inability to economically separate Fe3+(aq) front a variety of liquid effluents is a major concern for the primary metals industry. A unique solvent extraction process, galvanic stripping, has been del eloped to address this problem. The galvanic stripping of iron from D2EHPA using only a 5 similar to 10 g/L H2SO4 solution is achieved after Fe3+ is directly reduced to Fe2+ iii the organic phase using zinc metal additions. To date, the primary focus of the laboratory research has been on optimizing the parameters that control iron removal. The results from these studies have now been used to mice a preliminary design for a continuous flow process that is envisioned for zinc industrial applications. Specific quantitative data are shown for the use of a Zn-Pb alloy in the iron-removal process. Some introductory results sri electrochemical potential measurements and impurity distribution with solution cycling are also given MH - Mexico|Distrito Federal MH - USA PB - LITTLETON: SOC MINING METALLURGY EXPLORATION INC RP - NOT IN FILE U3 - TC 5 U4 - Metallurgy & Metallurgical Engineering;Mining & Mineral Processing U5 - J;Article AV - English IS - 0747-9182 UR - ISI:000085364400003 L2 - solvent extraction;galvanic stripping;iron removal;zinc processing;D2EHPA SO - Minerals & Metallurgical Processing 2000 ;17(1):16-22 861 UI - 15600 AU - Guariguata MR AU - Adame JJR AU - Finegan B AD - Ctr Agron Trop Invest & Ensenanza, Turrialba 7170, Costa RicaInst Manatlan Ecol & Conservac Biodivers, Mexico City 48900, DF, MexicoGuariguata, MR, Ctr Agron Trop Invest & Ensenanza, Turrialba 7170, Costa Rica TI - Seed removal and fate in two selectively logged lowland forests with constrasting protection levels AB - We evaluated seed removal by terrestrial mammals and the fate of removed, threaded seeds (as a measure of dispersal) in two neighboring tropical rain forest sites in the Caribbean lowlands of Costa Rica. Both sites have been selectively logged but differ in their degree of protection from human intrusion and habitat connectivity: La Selva is protected from hunting and connected to a national park, whereas Tirimbina remains unprotected and is not connected to a park. The two study sites are similar in logging intensity, elevation, and canopy tree structure and composition. We predicted that rates of seed removal and seed dispersal would be higher at the connected and protected site. For seven tree species (six of which are timber species), we determined that patterns of seed removal under an exclusion experiment (semipermeable cages vs. uncaged) varied both within species across sites and within sites across species, suggesting site differences in abundance, degree of animal activity, or presence of particular mammal seed consumers. Rates of seed removal and dispersal were largely species-specific. Most of the study species showed neither site nor treatment effect, whereas others had disproportionately higher removal rates at La Selva. For all species combined (covering a 6-month period due to phenological differences among the study species; n = 920 seeds per site), twice as many removed seeds were dispersed at La Selva (5.3%) than at Tirimbina (2.2%). Only one timber species, Pentaclethra macroloba, did not appear sensitive to site differences in rates of seed removal, most likely because its seeds are toxic to animals. Two timber species, Carapa nicaraguensis and Lecythis ampla, whose seeds are consumed by large scatterhoarding rodents, had 2.5% and 13%, respectively, of their removed seeds dispersed at La Selva, whereas no seeds were dispersed at Tirimbina. In northeastern Costa Rica, where forest cover is fragmented and selective logging is currently underway, the biological sustainability of timber species dispersed by terrestrial mammals may be more likely in sites protected from hunting and/or adjacent to protected areas than in forested patches subjected to hunting MH - Costa Rica MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 16 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000088442400015 L2 - VOUACAPOUA-AMERICANA CAESALPINIACEAE; TROPICAL FORESTS; RAIN-FOREST; FRENCH-GUIANA; COSTA-RICA; BERTHOLLETIA-EXCELSA; NEOTROPICAL FORESTS; DIPTERYX-PANAMENSIS; LOGGING DAMAGE; DISPERSAL SO - Conservation Biology 2000 ;14(4):1046-1054 862 UI - 15689 AU - Guarner J AU - Herrera-Goepfert R AU - Smith C AU - Mohar A AU - Halperin D AU - Sanchez L AU - Parsonnet J AD - Ctr Dis Control & Prevent, Atlanta, GA, USAInst Nacl Cancerol, Mexico City, DF, MexicoEcosur, San Cristobal, MexicoSan Francisco State Univ, San Francisco, CA 94132, USA TI - Gastric sampling for preneoplastic gastric lesions: Are two biopsies from the antrum and one from the fundus enough? MH - Mexico|Distrito Federal MH - Mexico|Chiapas MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0016-5085 UR - ISI:000086783703061 SO - Gastroenterology 2000 ;118(4):A750-A750 863 UI - 16318 AU - Guerrero BO AU - Thompson R AU - Fucugauchi JU AD - Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Del Coyoacan 04510, DF, MexicoUniv Edinburgh, Dept Geol & Geophys, Edinburgh EH9 3JW, Midlothian, ScotlandGuerrero, BO, UNAM, Inst Geofis, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo, Sonora, Mexico TI - Magnetic properties of lake sediments from Lake Chalco, central Mexico, and their palaeoenvironmental implications AB - Lake Chalco (99.0 degrees W, 19.5 degrees N) in the Basin of Mexico, was formed during the Pleistocene after the emplacement of the Chichinautzin volcanic field that dosed the former drainage system. The lake sediment record has been influenced by a number of factors, including glacial-interglacial cycles, local volcanism, erosion of soils and anthropogenic disturbances. The magnetic properties of the lake sediments and the associated tephra layers of the last 16 500 yr have been studied. It is found that the magnetic properties of the Lake Chalco sediments are very distinctive. Magnetic concentration varies by a factor of 1000 and magnetic stability also varies over an extremely wide range. The predominant magnetic mineral is titanomagnetite in addition to an imperfect antiferromagnetic phase, possibly goethite. An unusually large range of coercivities is found in certain of the tephras. Down-core variations in magnetic properties closely follow climatic/environmental changes previously established by other proxy methods. The late Pleistocene and late Holocene lake sediments display a higher concentration of magnetic minerals than the early-middle Holocene sediments. In the non-volcanic sediments, fluctuations in the magnetic concentration reflect changes in both the intensity of erosion, as represented by ferrimagnetic and paramagnetic minerals, and by the maturing of soils, as represented by geothite. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - United Kingdom PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary;Paleontology U5 - J;Article AV - English IS - 0267-8179 UR - ISI:000085977100003 L2 - magnetic properties;lake sediments;palaeoenvironments;LATE PLEISTOCENE; SUSCEPTIBILITY SO - Journal of Quaternary Science 2000 ;15(2):127-140 864 UI - 15175 AU - Guerrero CA AU - Zarate S AU - Corkidi G AU - Lopez S AU - Arias CF AD - UNAM, Inst Biotechnol, Dept Genet & Fisiol Mol, Cuernavaca 62250, Morelos, MexicoUNAM, Lab procesamiento Imagenes, Ctr Instrumentos, Cuernavaca 62250, Morelos, MexicoUniv Nacl Colombia, Fac Med, Dept Bioquim, Bogota, ColombiaArias, CF, UNAM, Inst Biotechnol, Dept Genet & Fisiol Mol, AP 510-3, Cuernavaca 62250, Morelos, Mexico TI - Biochemical characterization of rotavirus receptors in MA104 cells AB - We have tested the effect of metabolic inhibitors, membrane cholesterol depletion, and detergent extraction of cell surface molecules on the susceptibility of MA104 cells to infection by rotaviruses. Treatment of cells with tunicamycin, an inhibitor of protein N glycosylation, blocked the infectivity of the SA-dependent rotavirus RRV and its SA-independent variant nan by about 50%, while the inhibition of O glycosylation had no effect. The inhibitor of glycolipid biosynthesis d,l-threo-1-phenyl-2-decanoylamino-3-morpholino-1-propanol (PDMP) blocked the infectivity of RRV, nar3, and the human rotavirus strain Wa by about 70%. Sequestration of cholesterol from the cell membrane with beta-cyclodextrin reduced the infectivity of the three viruses by more than 90%. The involvement of N-glycoproteins, glycolipids, and cholesterol in rotavirus infection suggests that the virus receptor(s) might be forming part of lipid microdomains in the cell membrane. MA104 cells incubated with the nonionic detergent octyl-beta-glucoside (OG) showed a ca. 60% reduction in their ability to bind rotaviruses, the same degree to which they became refractory to infection, suggesting that OC extracts the potential virus receptor(s) from the cell surface, Accordingly, when preincubated with the viruses, the OG extract inhibited the virus infectivity by more than 95%. This inhibition was abolished when the extract was treated with either proteases or heat but not when it was treated with neuraminidase, indicating the protein nature of the inhibitor. Two protein fractions of around 57 and 75 kDa were isolated from the extract, and these fractions were shown to have rotavirus-blocking activity. Also, antibodies to these fractions efficiently inhibited the infectivity of the viruses in untreated as well as in neuraminidase-treated cells. Five individual protein bands of 30, 45, 57, 75, and 110 kDa, which exhibited virus-blocking activity, were finally isolated from the OG extract. These proteins are good candidates to function as rotavirus receptors MH - Colombia MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 41 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000089503400004 L2 - SIALIC-ACID; PORCINE ROTAVIRUS; SURFACE-PROTEINS; EPITHELIAL-CELLS; INFECTION; BINDING; VIRUS; IDENTIFICATION; ENTRY; SPECIFICITY SO - Journal of Virology 2000 ;74(20):9362-9371 865 UI - 16209 AU - Guerrero F AU - Amorin H AU - Portelles J AU - Fundora A AU - Perez J AU - Siqueiros J AU - Aguilera S AD - Univ Oriente, Fac Ciencias Nat, Santiago De Cuba 90500, CubaUniv La Habana, Fac Fis, IMRE, La Habana 10400, CubaUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Catolica Norte, Fac Ciencias, Antofagasta, ChileGuerrero, F, Univ Oriente, Fac Ciencias Nat, Santiago De Cuba 90500, Cuba TI - Effects of the sinterization process and the influence of the lanthanum content in the Sr0.3-3Y/2LaYBa0.7Nb2O5 ceramic system AB - A study of the dielectric properties of the lanthanum doped Sr0.3Ba0.7Nb2O6 (SBN30) ceramic according to the stoichiometric formulation Sr0.3-3y/2LayBa0.7Nb2O6 with y = 0.01, 0.03 and 0.05, and the influence of the sintering conditions are reported. The XRD shows single phase compounds for Sr0.285La0.01Ba0.07Nb2O6, (LSBN1) and Sr0.255La0.03Ba0.7Nb2O6 (LSBN3) ceramics, both samples having similar microstructure, densification and dielectric properties. The density increases linearly with Lnt, where t is the sintering time, and the values of the maximum ferroelectric peaks of the permitivity rise steadily with t. Using the Bruggeman model to estimate the theoretical permitivity, it is concluded that the magnitude of the experimental permitivity peaks are mainly affected by the volume fraction of porosity of the samples. In this study we also establish that pores diffusion mechanisms behave according to the Ginstling-Brownshten equation. For Sr0.225La0.05Ba0.7Nb2O6 (LSBN5) sample, XRD analysis reveals the presence of isostructural compounds of the intermediate phases BaNb2O6 and SrNB2O6, and the dielectric properties start to deteriorate. This fact indicates the existence of a solubility limit of the Lanthanum ions in the SBN solid solution MH - Chile MH - Cuba MH - Mexico|Baja California PB - CONCEPCION: SOCIEDAD CHILENA DE QUIMICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0366-1644 UR - ISI:000086415500009 L2 - ferroelectrics;porosity;dielectric properties;sintering conditions;pyroelectric properties SO - Boletin de la Sociedad Chilena de Quimica 2000 ;45(1):59-69 866 UI - 15761 AU - Guerrero J AU - Quiroz-Mercado H AU - Larriva-Saad J AU - Morales-Canton V AU - randa-Rabago J AU - Rodrigues-Reyes A AU - Jimenez-Sierra JM AU - Karageozian H AD - Asiciac Evitar Ceguera Mexico, Hosp Dr Luis Sanchez Bulnes, Mexico City, DF, MexicoUNAM, Mexico City, DF, MexicoAdv Corneal Syst, Irvine, CA, USA TI - Experimental biochemical reversible retinal detachment without retinotomies for macular translocation MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246700947 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S182-S182 867 UI - 16223 AU - Guerrero MA AU - Miranda LF AU - Manchado A AU - Vazquez R AD - Inst Astrofis Canarias, Tenerife 38200, SpainUniv Illinois, Dept Astron, Urbana, IL 61801, USACSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoGuerrero, MA, Inst Astrofis Canarias, Via Lactea S-N, Tenerife 38200, Spain TI - The triple-shell structure and collimated outflows of the planetary nebula NGC 6891 AB - Narrow-band H alpha and [N-II] images and high-dispersion spatially resolved echelle spectroscopy of the planetary nebula NGC 6891 are presented. These observations show a great wealth of structures. The bright central nebula is surrounded by an attached shell and a detached outer halo. Both the inner and intermediate shells can be described as ellipsoids with similar major to minor axial ratios, but different spatial orientations. The kinematical ages of the intermediate shell and halo are 4800 and 28 000 yr, respectively. The intershell time lapse is in good agreement with the evolutionary interpulse time lapse. A highly collimated outflow is observed to protrude from the tips of the major axis of the inner nebula and impact on the outer edge of the intermediate shell. Kinematics and excitation of this outflow provide conclusive evidence that it is deflected during the interaction with the outer edge of the intermediate shell. At the same time, both the kinematics and the morphology of the intermediate shell appear to be affected by this interaction MH - Mexico|Baja California MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000086272200005 L2 - stars : AGB and post-AGB;ISM : jets and outflows;ISM : kinematics and dynamics;planetary nebulae : individual : NGC 6891;STELLAR WIND PALEONTOLOGY; HALOS; JETS; SPECTROSCOPY; EVOLUTION; BIPOLAR; ANSAE; STARS; MASS SO - Monthly Notices of the Royal Astronomical Society 2000 ;313(1):1-7 868 UI - 16507 AU - Guevara-Guzman R AU - Barrera-Mera B AU - de la Riva C AU - Kendrick KM AD - Babraham Inst, Lab Cognit & Dev Neurosci, Cambridge CB2 4AT, EnglandNatl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoKendrick, KM, Babraham Inst, Lab Cognit & Dev Neurosci, Cambridge CB2 4AT, England TI - Release of classical transmitters and nitric oxide in the rat olfactory bulb, evoked by vaginocervical stimulation and potassium, varies with the oestrus cycle AB - In vivo microdialysis was used to investigate the effects of ovariectomy and the oestrus cycle on vaginocervical stimulation-evoked classical transmitter and nitric oxide release in the olfactory bulb of anaesthetized (urethane) and conscious rats. During pro-oestrus/oestrus, vaginocervical stimulation (1 or 10 min) significantly increased concentrations of glutamate, aspartate, GABA, noradrenaline, dopamine and nitric oxide (citrulline) but failed to do so in met-oestrus/di-oestrus or following ovariectomy. Potassium chloride-evoked GABA, noradrenaline and nitric oxide release in the olfactory bulb was also significantly enhanced during pro-oestrus/ oestrus, The effects of vaginocervical stimulation on olfactory bulb transmitter release during pro-oestrus/oestrus were significantly reduced by pelvic or vagus nerve section. Basal concentrations of classical transmitters and nitric oxide in the olfactory bulb did not vary across the oestrus cycle although noradrenaline and dopamine levels were reduced following ovariectomy. These results confirm our previous electrophysiological data showing that the olfactory bulb mitral cells are only excited by vaginocervical stimulation during pro-oestrus/oestrus. They also suggest that sex hormones acting primarily at the level of the olfactory bulb dramatically enhance the ability of vaginocervical stimulation to evoke release of both classical transmitters and nitric oxide in this region. Such alterations in neurochemical release in the olfactory bulb may be important for mediating plasticity changes underlying olfactory recognition of mates or offspring MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000085366600009 L2 - dopamine;GABA;glutamate;neurotransmitters;nitric oxide;oestrus cycle;olfactory bulb;GAMMA-AMINOBUTYRIC-ACID; FEMALE RAT; ESTROUS-CYCLE; C-FOS; MESSENGER-RNA; REPRODUCTIVE-ORGANS; MATERNAL EXPERIENCE; RECOGNITION MEMORY; SEXUAL STIMULATION; OVARIAN-STEROIDS SO - European Journal of Neuroscience 2000 ;12(1):80-88 869 UI - 16533 AU - Guevara-Olvera L AU - Hung CY AU - Yu JJ AU - Cole GT AD - Med Coll Ohio, Dept Microbiol & Immunol, Toledo, OH 43614, USAInst Tecnol Celaya, Dept Ingn Bioquim, Celaya, Gto, MexicoCole, GT, Med Coll Ohio, Dept Microbiol & Immunol, 3055 Arlington Ave, Toledo, OH 43614 USA TI - Sequence, expression and functional analysis of the Coccidioides immitis ODC (ornithine decarboxylase) gene AB - The ornithine decarboxylase (ODC) gene of the human respiratory fungal pathogen, Coccidioides immitis (Ci) was cloned, sequenced, chromosome-mapped, and expressed in Escherichia coli (Ec). The genomic, cDNA and translated sequences are presented. Transformation of an ODC null mutant strain of Ec (EWH 319) with the Ci ODC gene was conducted to confirm function of the protein encoded by the fungal gene. Activity of the enzyme by the bacterial transformant was inhibited by 1, 4-diamino-2-butanone (DAB), a known inhibitor of eukaryotic ODC. Temporal expression of the Ci ODC gene during the parasitic cell cycle is constitutive, based on results of RT-PCR. However, results of enzyme activity assays of cell homogenates obtained at different stages of parasitic cell development in vitro showed that the functional protein is present only during periods of isotropic growth and segmentation, and these morphogenetic events can be arrested by the addition of DAB. The observed absence of a difference in steady-state mRNA transcript amounts, and the developmentally correlated Variation in levels of enzyme activity, suggest a translational or post-translational mechanism of ODC regulation. Since no PEST sequence was detected in the Ci ODC, enzyme regulation by programmed protein degradation as reported for many other eukaryotic ODCs may not occur in this case. ODC activity appears to play a key role in the morphogenesis of Ci, and the enzyme could be a rational target for therapy of disseminated coccidioidomycosis. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0378-1119 UR - ISI:000085278700047 L2 - Coccidioides;complementation;gene function;genomic/cDNA sequences;ODC;protein expression;CELL REACTIVE PROTEIN; SACCHAROMYCES-CEREVISIAE; ESCHERICHIA-COLI; CANDIDA-ALBICANS; POLYAMINE; CLONING SO - Gene 2000 ;242(1-2):437-448 870 UI - 11586 AU - Guevara P AU - Perez-Amador MC AU - Zuniga B AU - Snook M AD - Univ Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Mexico City 04510, DF, MexicoRichard B Russell Agr Res Ctr, Athens, GA 30613, USAGuevara, P, Univ Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Flavones in corn silks & resistance to insect attacks AB - Flavone contents differed in silks of three maize lines with different resistance to larvae of fall amy-worm (FAW), Spodoptera frugiperda Smith, and Southwestern corn borer (SWCB), Diatraea grandiosella Dyar, The main compound in the resistant (CML 67) and in the intermediate (CML 135) lines was apimaysin. In the susceptible line (CML 131) the main compound was 3-methoxymaysin, which was absent from the other two lines. The same distribution pattern was found in the infested plants, The variation in flavone concentration among the 3 lilies and among plants infested with Spodoptera frugiperda and Diatraea grandiosella, suggests a different defense mechanism of the plant against each of the two insects MH - Mexico|Distrito Federal MH - USA PB - VICENTE LOPEZ (BA): FUNDACION ROMULO RAGGIO RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9457 UR - ISI:000174140400021 SO - Phyton-International Journal of Experimental Botany 2000 ;69():151-156 871 UI - 14917 AU - Guevara R AU - Hutcheson KA AU - Mee AC AU - Rayner ADM AU - Reynolds SE AD - Univ Bath, Dept Biol & Biochem, Bath BA2 7AY, Avon, EnglandGuevara, R, Inst Ecol AC, Dept Biol Suelos, Km 2-5 Carretera Antigua Coatepec,AP 63, Xalapa 91000, Veracruz, Mexico TI - Resource partitioning of the host fungus Coriolus versicolor by two ciid beetles: the role of odour compounds and host ageing AB - The ciid beetles Ocetotemnus glabriculus and Cis boleti exploit different developmental stages of fruit bodies of their preferred host fungus Coriolus versicolor. Larvae of the smaller beetle, O. glabriculus, mainly use young, expanding, fruit bodies; adults of O. glabriculus are predominantly found in young fruit bodies. By contrast, adults and larvae of the larger beetle, C. boleti, are prevalent in fully developed fruit bodies of C. versicolor. Because fruit bodies of most genets emerge during spring and early summer and mature by autumn, O. glabriculus and C. boleti breed in separated seasons. Adults and larvae of O. glabriculus are abundant in spring and early summer. By contrast, the number of adults and larvae of C. boleti increases gradually from late spring to summer and peaks in autumn. We conducted a field experiment that suggests that the phenological dynamics of C. versicolor fruit bodies drive the separation of breeding seasons between O. glabriculus and C. boleti. Additionally, laboratory experiments revealed that O. glabriculus and C. boleti have differential behavioural responses to odour compounds from young and mature fruit bodies of C. ter versicolor. We conclude that age-related changes in the chemical composition of fruit bodies may allow O. glabriculus and C. boleti to discriminate among C. versicolor, thus providing a mechanism for the partitioning of the resource MH - United Kingdom MH - Mexico|Veracruz PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 4 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000165237400018 L2 - FOMITOPSIS-PINICOLA; FOMES-FOMENTARIUS; HYMENOPTERA; TRICHOGRAMMATIDAE; SCELIONIDAE; POPULATIONS; COLEOPTERA; LARVAE; EGGS; BARK SO - Oikos 2000 ;91(1):184-194 872 UI - 15165 AU - Guevara R AU - Rayner ADM AU - Reynolds SE AD - Univ Bath, Sch Biol & Biochem, Bath BA2 7AY, Avon, EnglandGuevara, R, Inst Ecol AC, Dept Biol Suelos, Km 2-5 Antigua Carretera & Coatepec,AP 63, Xalapa 91000, Veracruz, Mexico TI - Orientation of specialist and generalist fungivorous ciid beetles to host and non-host odours AB - Most ciids (Ciidae) are strict fungivores specialized on fruit bodies of wood-rotting fungi. The Ciidae includes both specialist and generalist species. Recent evidence suggests that ciids locate and discriminate their potential hosts based mainly on fungal odours. In this study, we investigated the field distribution of ciids in a local woodland near Bath, U.K. We also evaluated experimentally the behavioural responses of ciids to host and non-host fungi in an olfactometer, and explored potential differences in putative aroma compounds in host fungi. Our field data showed that Octotemnus glabriculus, Cis boleti and Cis nitidus have preference for one host species. whereas C. bilamellatus has no preference. The experimental evidence was in accordance with the held observations. The specialists O. glabriculus, C. boleti and C. nitidus were specifically attracted to odour compounds of their preferred host fungi: Coriolus versicolor for the first two beetles and Ganoderma adspersum for the latter one. By contrast, the generalist C. bilamellatus was attracted to odours from C. versicolor, G. adspersum and Piptoporus betulinus. The evidence from this and other published studies suggest that ciids depend mainly on fruit body odours for location and discrimination of their host fungi. In accordance with this, we observed differential behavioural responses of ciids to aroma compounds of host and non-host species MH - United Kingdom MH - Mexico|Veracruz PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 0307-6962 UR - ISI:000089592200013 L2 - Aphyllophorales;Ciidae;chemoattraction;fungivory;mycophagy;wood-rotting fungi;ODOR-MEDIATED AVOIDANCE; FOMITOPSIS-PINICOLA; FOMES-FOMENTARIUS; DROSOPHILA PARASITOIDS; VOLATILE CONSTITUENTS; TETRANYCHUS-URTICAE; COLEOPTERA; DISCRIMINATION; COMPETITION; PREFERENCE SO - Physiological Entomology 2000 ;25(3):288-295 873 UI - 16550 AU - Guevara R AU - Rayner ADM AU - Reynolds SE AD - Inst Ecol, Dept Biol Suelos, AC, Xalapa 91000, Veracruz, MexicoUniv Bath, Sch Biol & Biochem, Bath BA2 7AY, Avon, EnglandGuevara, R, Inst Ecol, Dept Biol Suelos, AC, Km 2-5 Antigua Carretera Coatepec,AP 63, Xalapa 91000, Veracruz, Mexico TI - Effects of fungivory by two specialist ciid beetles (Octotemnus glabriculus and Cis boleti) on the reproductive fitness of their host fungus, Coriolus versicolor AB - On the basis of the evidence that insect fungivory has the potential to affect fungal reproductive fitness, we investigated the effects of two specialist ciid beetles (Octotemnus glabriculus and Cis boleti) on the reproductive potential of their host fungus, Coriolus versicolor. We found, from field data, a negative correlation between the number of individuals of O. glabriculus inhabiting C. versicolor fruit bodies and the percentage of the fungal spore-producing surface (hymenium) that was functional. By contrast, the number of C. boleti inhabiting C. versicolor fruit bodies did not correlate with the percentage of functional hymenium. Experimentally, O. glabriculus and C. boleti reduced the reproductive potential of C. versicolor by 58% and 30%, respectively, whereas the combined trophic activity of both beetles caused a reduction of 64%. This latter effect was not significantly different from that caused by O. glabriculus alone. These findings disagree with previous assertions that insect fungivory on fruit bodies has only neutral effects on fungal fitness. We conclude that in the short-term, fungivory by ciids significantly decreases the area of functional hymenium of C. versicolor and is likely to reduce fungal reproductive fitness. Within this perspective the evolution of certain fungal characteristics (i.e. chemical composition, consistency and phenology) can be interpreted as being driven by fungivory MH - United Kingdom MH - Mexico|Veracruz PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0028-646X UR - ISI:000085116800015 L2 - ciids;fungivory;fungal ecology;mycophagous;wood-rotting fungi;Coriolus versicolor;SPORE DISPERSAL; ECTOMYCORRHIZAL FUNGI; PERIODICAL CICADAS; MYCORRHIZAL FUNGI; SMALL MAMMALS; SITKA SPRUCE; COLLEMBOLAN; FORESTS; MYCOPHAGY; LITTER SO - New Phytologist 2000 ;145(1):137-144 874 UI - 16696 AU - Guibal E AU - Vincent T AU - Mendoza RN AD - Ecole Mines, Lab Genie Environm Ind, F-30319 Ales, FranceUniv Guanajuato, Inst Invest Cientificas Cerro Venada, Guanajuato 36000, MexicoGuibal, E, Ecole Mines, Lab Genie Environm Ind, 6 Ave Clavieres, F-30319 Ales, France TI - Synthesis and characterization of a thiourea derivative of chitosan for platinum recovery AB - Chitosan is effective at removing platinum from dilute solutions, but sorption properties are significantly affected by the presence of competitor anions, such as chloride and, especially, sulfate anions. Sorption capacities in such complex solutions are enhanced by grafting thiourea through glutaraldehyde linkage. The influence of the amount of glutaraldehyde and thiourea in the impregnation bath was investigated and optimized with special attention to the composition of the solution and the type of acid used for pH control. This modification involves a change in the sorption mechanism: While glutaraldehyde-crosslinked chitosan adsorbs platinum through an ion-exchange mechanism, the thiourea derivative of chitosan acts as a chelating resin, less sensitive to ionic strength and competitor anions. Platinum sorption is also less sensitive to pH, and increasing the sulfate anion concentration has a limited effect on platinum sorption in comparison with the crosslinked sorbent. Thiourea grafting seems to increase sorption kinetics, especially in solutions controlled with sulfuric acid. SEM-EDAX techniques as well as FTIR analyses were used to characterize chemical modifications of the sorbent. (C) 2000 John Wiley & Sons, Inc MH - France MH - Mexico|Guanajuato PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 45 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000083843800014 L2 - chitosan;thiourea;glutaraldehyde;platinum;sorption isotherms;sorption kinetics;competitor anion effect;pH effect;FTIR;SEM-EDAX;URANYL IONS; PHYSICOCHEMICAL PARAMETERS; METAL SORPTION; ADSORPTION; BEADS; KINETICS; REMOVAL; EQUILIBRIUM; COPPER(II); BRINES SO - Journal of Applied Polymer Science 2000 ;75(1):119-134 875 UI - 15454 AU - guilera-Granja F AU - Montejano-Carrizales JM AU - Guevara J AU - Llois AM AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, MexicoComis Nacl Energia Atom, Dept Fis, RA-1429 Buenos Aires, DF, ArgentinaAguilera-Granja, F, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, Mexico TI - Electronic properties of small free Co clusters AB - We present a systematic study of the average magnetic moments and the non-metal-metal transition of free Co-N clusters having different geometries: hexahedral, octahedral and decahedral. The electronic structure is calculated with a parameterized Hubbard Hamiltonian with spd electrons within the unrestricted Hartree-Fock approximation, and spill-over effects are considered. We compare our calculations with other theoretical calculations in the literature. We also comment on the experimental results MH - Argentina MH - Mexico|San Luis Potosi PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800081 L2 - TRANSITION-METAL CLUSTERS; IONIZATION-POTENTIALS; MAGNETIC-MOMENTS; NI CLUSTERS; DEPENDENCE; PARTICLES SO - Physica Status Solidi B-Basic Research 2000 ;220(1):455-460 876 UI - 14867 AU - Guirado-Lopez R AU - Desjonqueres MC AU - Spanjaard D AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, MexicoCEA Saclay, Serv Rech Surfaces & Irradiat Matiere, F-91191 Gif Sur Yvette, FranceUniv Paris Sud, Phys Solides Lab, F-91405 Orsay, FranceGuirado-Lopez, R, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, Mexico TI - Tight-binding study of relaxation in Rh-N and Pd-N clusters (9 <= N <= 165) AB - We have used a tight-binding total-energy expression to study the electronic, magnetic, and structural properties of relatively large Rh-N and Pd-N clusters (9 less than or equal to N less than or equal to 165). An important feature of our approach is that it treats simultaneously, and in a consistent way, both atomic and electronic structures by performing a relaxation process using molecular dynamics based on the method of Car and Parrinello. The clusters are built by adding successive atomic shells around a central atom. These shells are allowed to relax independently and obey symmetry constraints. It is found that although an overall contraction occurs, the relaxed structure is far from being homothetical to the unrelaxed one. For small RhN clusters (N less than or equal to 75) multiple magnetic solutions are obtained and in all cases the local magnetic moments M(i) present a remarkable size and environment dependence. The relation between the observed average magnetization and the cluster geometry is also analyzed. Perspectives of extensions of this study are discussed MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000165369700100 L2 - SMALL PALLADIUM PARTICLES; MOLECULAR-DYNAMICS; TRANSITION-METALS; MAGNETIC-PROPERTIES; LATTICE-PARAMETER; SILICON CLUSTERS; SIZE DEPENDENCE; SURFACES; NICKEL SO - Physical Review B 2000 ;62(19):13188-13195 877 UI - 16085 AU - Guirado-Lopez R AU - Villasenor-Gonzalez P AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 7800, MexicoUniv Toulouse 3, CNRS, UMR 5626, Phys Quant Lab, F-31062 Toulouse, FranceGuirado-Lopez, R, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 7800, Mexico TI - Magnetism of Rh-N clusters AB - The size and structural dependence of the magnetic properties of Rh-N clusters (3 less than or equal to N less than or equal to 27) are studied by using a d-electron tight-binding Hamiltonian which includes hybridizations, Coulomb interactions, and spin-orbit coupling on the same electronic level. We show that the spin (S) and orbital (L) magnetic moments depend strongly on the local environment of the atoms and that their behavior as a function of the cluster size present oscillations which are in good qualitative agreement with experiment. The magnetic anisotropy energy and the anisotropy in L are quantified by considering different directions of the spin magnetization S within the cluster. We conclude that orbital contributions to the average magnetization in Rh-N clusters could be important for precise comparison with experiment. Bond-length relaxation effects are also briefly discussed. (C) 2000 American Institute of Physics. [S0021-8979(00)30208-0] MH - France MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000086727200079 L2 - METAL-CLUSTERS SO - Journal of Applied Physics 2000 ;87(9):4906-4908 878 UI - 15631 AU - guirre-von-Wobeser E AU - Figueroa FL AU - Cabello-Pasini A AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoUniv Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, SpainCabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Effect of UV radiation on photoinhibition of marine macrophytes in culture systems AB - The present study examined the effect of UV and photosynthetically active radiation (PAR) on photoinhibition and recovery in the Phaeophyte Macrocystis pyrifera, the Rhodophyte Chondrus crispus and the Chlorophyte Ulva lactuca under outdoor culture conditions. There was an increase in photoinhibition as a consequence of high exposure to UV-B radiation in M. pyrifera, however, high levels of PAR accounted for most of the photoinhibition in C. crispus and U. lactuca. Photodamage by UV-A, UV-B and PAR was completely repaired within 5 h and effective quantum yield reached pretreatment values in the three species studied. Species were less susceptible to photoinhibition after being incubated for 5 d under high exposures of natural irradiance suggesting a photoadaptive process. The recovery of the effective quantum yield was impaired by long exposure to high levels of UV-B in C. crispus and UV-A, UV-B and PAR in M. pyrifera. This suggests a different kind of damage by UV-A and PAR radiation, one to the photosynthetic apparatus and another which affects the repair mechanism of some species. There was an increase in UV-absorption (lambda 330 nm) in M. pyrifera and C. crispus within four days of the initiation of the experiment suggesting that these species photoprotect their photosynthetic system when exposed to elevated UV and PAR levels MH - Mexico|Baja California MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0921-8971 UR - ISI:000088222700009 L2 - Chlorophyll fluorescence;Chondrus crispus;Macrocystis pyrifera;photosynthesis;photoinhibition;outdoor culture system;Ulva lactuca;UV-radiation;ULTRAVIOLET-B RADIATION; SOLAR-RADIATION; ARCTIC MACROALGAE; AMINO-ACIDS; PHOTOSYNTHESIS; PHYTOPLANKTON; FIELD; FLUORESCENCE; RHODOPHYTA; NITROGEN SO - Journal of Applied Phycology 2000 ;12(2):159-168 879 UI - 16544 AU - Gumen LN AU - Feldman EP AU - Yurchenko VM AU - Mel'nik TN AU - Krokhin AA AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USADonetsk Phys & Engn Inst, UA-340114 Donetsk, UkraineUniv Popular Auton Estado Puebla, Puebla 72160, MexicoKrokhin, AA, Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England TI - Surface segregation of interacting atoms: analytical approach using a thermodynamic model AB - Binary atomic interactions are included in the thermodynamic Bragg-Williams model to study the cosegregation of different species of atoms in a multi-component alloy. The kinetics of segregating atoms is described by a set of mutually connected diffusion equations with boundary condition determined by instantaneously equalizing chemical potentials. This model allows analytical solution if t-->0 and t-->infinity. For specific values of parameters our solution shows the approach to equilibrium through a quasi-equilibrium state, that is, the phenomenon of delayed segregation which has been recently analyzed by Jager in the framework of the quasi-chemical approximation. We also predict a phenomenon of the nonmonotonic segregation.(C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla MH - Ukraine MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000085085500040 L2 - alloys;equilibrium thermodynamics and statistical mechanics;surface segregation;surface thermodynamics (including phase transitions);GRAIN-BOUNDARY SEGREGATION; KINETICS SO - Surface Science 2000 ;445(2-3):526-534 880 UI - 15969 AU - Guo XX AU - Lin HM AU - Lin ZW AU - Montano M AU - Sansores R AU - Wang GR AU - DiAngelo S AU - Pardo A AU - Selman M AU - Floros J AD - Penn State Univ, Coll Med, Dept Cellular & Mol Physiol, Hershey, PA, USAPenn State Univ, Coll Med, Dept Pediat, Hershey, PA, USAPenn State Univ, Coll Med, Dept Hlth Evaluat Sci, Hershey, PA, USAUNAM, Fac Ciencias, Mexico City, DF, MexicoInst Nacl Enfermedades Resp, Mexico City, DF, Mexico TI - Polymorphisms of surfactant protein gene A, B, D, and of SP-B-linked microsatellite markers in COPD of a Mexican population MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 7 U4 - Respiratory System U5 - J;Meeting Abstract AV - English IS - 0012-3692 UR - ISI:000087178200020 L2 - SUSCEPTIBILITY; DEFICIENCY; DISEASE; ALLELE; LOCUS SO - Chest 2000 ;117(5):249S-250S 881 UI - 15803 AU - Gurevich YG AU - Logvinov GN AU - Espejo G AU - Titov OY AU - Meriuts A AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoKharkov Polytech Univ, UA-310002 Kharkov, UkraineIPN, CICATAI, Santiago De Queretaro, Qro, MexicoGurevich, YG, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - The role of nonequilibrium carriers in linear charge transport (Ohm's law) AB - The charge transport in a bipolar semiconductor to a metal wire was studied in a linear approximation with respect to the electric field. It is shown that both electrons and holes in general are nonequilibrium carriers in an arbitrarily weak electric field. Therefore, the consideration of surface and bulk recombination is necessary for the correct description of electrical conductivity. The spatial distributions of quasi-Fermi levels for electrons and holes are obtained in the quasi-neutrality approximation, and the general expression for a bipolar semiconductor conductivity is derived. This conductivity depends strongly not only on the transport of electrons and holes but also on the surface- and bulk-recombination rates. The criteria of low and high rates of recombination are determined; it is shown that a commonly used expression for the conductivity of a bipolar semiconductor is valid only at high rates of surface and/or bulk recombination. (C) 2000 MAIK "Nauka / Interperiodica" MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7826 UR - ISI:000087771900003 SO - Semiconductors 2000 ;34(7):755-758 882 UI - 14592 AU - Gurin VS AU - Bogdanchikova NE AU - Petranovskii VP AD - UNAM, CCMC, Ensenada 22800, Baja California, MexicoBelarusian State Univ, Physicochem Res Inst, Minsk 220080, ByelarusBogdanchikova, NE, UNAM, CCMC, Apdo Postal 2681, Ensenada 22800, Baja California, Mexico TI - Few-atomic silver clusters in zeolites: Ab initio MO LCAO calculation and optical spectroscopy AB - Size-selected silver clusters (Ags) have been produced in two different zeolite matrixes (mordenite and erionite) with circular and elliptic channels (cross sections with axes 0.63 x 0.63 and 0.65 x 0.70 nm, respectively(1)). The clusters were detected by UV-vis diffuse reflectance spectra from characteristic short-wavelength peaks (principally at 290 and 320 nm). These peaks contrast strongly with the plasmon resonances, familiar for nanometer-sized silver particles. Observed dusters are stable over an extremely long period (more than 5 years of storage under ambient conditions for Ag-erionite samples). Recently, the specific geometries of these Ags clusters-were determined by means of EXAFS.(2) MO LCAO (molecular orbital with a linear combination of atomic orbital) calculations for the ground states of a series of Ag-8 clusters with different geometries were performed. The most probable Ag-8 cluster structure fitting the zeolite voids was selected. Such clusters have electronic transition energies consistent with the experimental data, and the cluster geometries are similar to those obtained from the EXAFS measurements MH - Byelarus MH - Mexico|Baja California PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000166161500005 L2 - RARE-GAS MATRICES; ABSORPTION-SPECTRA; AQUEOUS-SOLUTION; PHYSICOCHEMICAL PROPERTIES; ELECTRONIC-STRUCTURE; SINGLE-CRYSTALS; PARTICLES; METAL; STABILIZATION; TRANSITION SO - Journal of Physical Chemistry B 2000 ;104(51):12105-12110 883 UI - 16040 AU - Gutierrez-Cazarez Z AU - Qadri F AU - Albert MJ AU - Giron JA AD - Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Puebla 72570, MexicoInt Ctr Diarrhoeal Dis Res, Dhaka 1000, BangladeshGiron, JA, Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Edificio 76,3r Piso,14 Sur Ave,San Claudio,Ciudad, Puebla 72570, Mexico TI - Identification of enterotoxigenic Escherichia coli harboring longus type IV pilus gene by DNA amplification AB - DNA amplification of lngA, the structural gene of longus type IV pilus produced by human enterotoxigenic Escherichia coli (ETEC) was achieved by the use of specific oligonucleotide primers designed from the nucleotide sequence of lngA. A 630-bp fragment representing the entire lng4 gene was amplified in eight prototype strains previously characterized as longus positive, Five ETEC strains producing colonization factor antigen III (CFA III) (also a type IV pilus) were also positive by PCR, confirming the DNA homology between CFA III and longus. None of the non-ETEC and non-E. coli enteropathogens studied showed the 0.63-kbp amplicon, The procedure thus detected only ETEC strains harboring type IV pili genes with or without other colonization factors. Except for five lngA PCR-positive, probe-positive strains, all lngA PCR-positive strains produced the pilin as demonstrated by immunoblotting. To test the amplification procedure in a clinical setting, a collection of 264 fresh clinical E. coli strains isolated from 88 Mexican children with diarrhea was screened by PCR, Among 82 ETEC isolates found, 30 (36.5%) were lngA PCR-positive. Twenty-seven percent of the children shed ETEC that possessed lngA, In parallel with DNA probes or PCR protocols to detect enterotoxin genes, the lngA PCR method may prove useful for detection of ETEC harboring type TV pilus genes in epidemiological studies MH - Bangladesh MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000086902400012 L2 - BUNDLE-FORMING PILUS; GM1-ENZYME-LINKED IMMUNOSORBENT-ASSAY; PUTATIVE COLONIZATION FACTORS; MONOCLONAL-ANTIBODIES; STRUCTURAL GENE; FACTOR ANTIGENS; DIARRHEA; TOXIN; PREVALENCE; CFA/III SO - Journal of Clinical Microbiology 2000 ;38(5):1767-1771 884 UI - 15348 AU - Gutierrez-Escolano AL AU - Brito ZU AU - del Angel RM AU - Jiang X AD - IPN, Ctr Invest & Estudios Avanzados, Dept Patol Expt, Mexico City 07360, DF, MexicoEastern Virginia Med Sch, Childrens Hosp Kings Daughters, Ctr Pediat Res, Norfolk, VA 23501, USAGutierrez-Escolano, AL, IPN, Ctr Invest & Estudios Avanzados, Dept Patol Expt, Av IPN 2508,Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Interaction of cellular proteins with the 5 ' end of Norwalk virus genomic RNA AB - The lack of a susceptible cell line and an animal model for Norwalk virus (NV) infection has prompted the development of alternative strategies to generate in vitro RNAs that approximate the authentic viral genome. This approach has allowed the study of viral RNA replication and gene expression. In this study, using mobility shift and cross-linking assays, we detected several cellular proteins from HeLa and CaCo-2 cell extracts that bind tot and form stable complexes with, the first 110 nucleotides of the 5' end of NV genomic RNA, a region previously predicted to form a double stem-loop structure. These proteins had molecular weights similar to those of the HeLa cellular proteins that bind to the internal ribosomal entry site of poliovirus RNA. HeLa proteins La, PCBP-2, and PTB, which are important for poliovirus translation, and hnRNP L, which is possibly implicated in hepatitis C virus translation, interact with NV RNA. These protein-RNA interactions are likely to play a role in NV translation and/or replication MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000088933700040 L2 - TRACT-BINDING-PROTEIN; POLIOVIRUS 5'-UNTRANSLATED REGION; INTERNAL TRANSLATION INITIATION; NEGATIVE-STRAND RNA; NONBACTERIAL GASTROENTERITIS; NONCODING REGION; RIBOSOMAL ENTRY; MESSENGER-RNA; LINE CACO-2; VIRAL-RNA SO - Journal of Virology 2000 ;74(18):8558-8562 885 UI - 15677 AU - Gutierrez-Pena E AU - Von Eye A AD - Michigan State Univ, Dept Psychol, E Lansing, MI 48824, USAUNAM, IIMAS, Mexico City, DF, Mexicovon Eye, A, Michigan State Univ, Dept Psychol, 119 Snyder Hall, E Lansing, MI 48824 USA TI - A Bayesian approach to Configural Frequency Analysis AB - Configural Frequency Analysis (CFA) is a method for cell-wise inspection of cross-classifications. CFA searches for types, that is, patterns of variable categories that occur more often than expected from some chance model, and for antitypes, that is, patterns observed less often than expected. Thus far, CFA has been plagued by the difficulties involved when looking for patterns of types and antitypes. This article introduces Bayesian CFA. Using Bayesian CFA one can (1) search for types and antitypes as before with the advantage that adjustment of the experiment-wise significance level ct is not necessary; and (2) test whether groups of types and antitypes form composite types or composite antitypes. This option is crucial when patterns of types or antitypes must exist for a concept to be retained. Empirical examples use data from alcohol research and from sleep research to illustrate both new options. Characteristics of Bayesian CFA and extensions are discussed MH - Mexico|Distrito Federal MH - USA PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Interdisciplinary Applications;Social Sciences, Mathematical Methods;Sociology U5 - J;Article AV - English IS - 0022-250X UR - ISI:000088127000003 L2 - Configural Frequency Analysis;Bayesian statistics;types;antitypes SO - Journal of Mathematical Sociology 2000 ;24(2):151-174 886 UI - 15331 AU - Gutierrez-Rodriguez A AU - Sampayo OA AD - Univ Autonoma Zacatecas, Escuela Fis, Zacatecas 98060, MexicoUniv Mar del Plata, Dept Fis, RA-7600 Mar Del Plata, ArgentinaGutierrez-Rodriguez, A, Univ Autonoma Zacatecas, Escuela Fis, Apartado Postal C-580, Zacatecas 98060, Mexico TI - Detection of charged minimal supersymmetric standard model Higgs bosons at the NLC AB - We study the possibility of detecting the charged Higgs bosons predicted in the minimal supersymmetric standard model (H+/-), with the reactions e(+) e(-) --> tau(-)<(nu)over bar>H-tau(+), tau(+)nu(tau)H(-), using the helicity formalism. We analyze the region of parameter space (m(H+) - tan beta) where H+/- could be detected in the limit when tan beta is large. The numerical computation is done for the energy which is expected to be available at a possible next linear e(+)e(-) collider (root s = 500 GeV) MH - Argentina MH - Mexico|Zacatecas PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000089022500072 L2 - MASS SUM-RULES; GAUGE-THEORIES; MULTIPLE BREMSSTRAHLUNG; HIGH-ENERGIES; RADIATIVE-CORRECTIONS; LINEAR COLLIDER; E+E COLLIDERS; SECTOR; AMPLITUDES; SIGNALS SO - Physical Review D 2000 ;6205(5): 887 UI - 16238 AU - Gutierrez-Rodriguez M AU - Reynolds MP AU - Larque-Saavedra A AD - Colegio Postgraduados, Mexico City 56230, DF, MexicoCIMMYT, Mexico City 06600, DF, MexicoReynolds, MP, CIMMYT, Apartado 370,POB 60326, Houston, TX 77205, USA TI - Photosynthesis of wheat in a warm, irrigated environment - II. Traits associated with genetic gains in yield AB - Net photosynthetic rate (A(n)), stomatal conductance (g(s)), intercellular CO2 concentration (C-i), and chlorophyll concentration estimate ([Chl]) were measured on flag leaves of 30 random individual F-5 plants within each of eight F-2-derived bulks, from a cross between two spring wheat (Triticum aestivum L.) cultivars, Seri-M82, and Siete Cerros-T66 contrasting in A(n), and realized grain yield. Measurements were made on fully irradiated leaves of field plots growing in a warm, low relative humidity, irrigated environment. Average A(n) of F-2-derived families measured during grain filling ranged from 19.1 to 24.4 mu mol m(-2) s(-1) among families, with standard errors ranging from 0.35 to 0.53. Based on measurements of A(n) of flag leaf lamina of individual plants, measured several times during grain filling, four plants from each of four bulks were selected for high and low A(n) to represent the range of genetic diversity within and among F-2:5 families. From each of these 16 selected F-5 plants, head rows were grown to generate inbred F-5:7 lines for replicated yield trials, which were sown in two environments in the same locality, differing by five weeks in sowing date, and having mean grain yields of approximately 3.5 t ha(-1). Mean A(n) measured on randomly selected flag leaves of the inbred lines ranged from 16.3 to 24.6 mu mol m(-2) s(-1) over both sowing dates. A(n), g(s), and C-i all correlated with yield of inbred lines. Furthermore, A(n) and g(s) measured on individual F-5 plants correlated genetically and phenotypically with A(n), g(s), and yield of the inbred lines deriving from the same plants, in both environments where yield was evaluated. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000086266800005 L2 - breeding;photosynthesis;physiological selection traits;yield;wheat;IMPROVEMENT; SELECTION SO - Field Crops Research 2000 ;66(1):51-62 888 UI - 14855 AU - Gutierrez-Ruiz EJ AU - Ramirez-Cruz GT AU - Gamboa EIC AU - Alexander DJ AU - Gough RE AD - Vet Labs Agcy Weybridge, Avian Virol, Addlestone KT15 3NB, Surrey, EnglandUniv Autonoma Yucatan, Fac Med Vet & Zootecn, Dept Virol, Merida Yucatan, MexicoGough, RE, Vet Labs Agcy Weybridge, Avian Virol, Addlestone KT15 3NB, Surrey, England TI - A serological survey for avian infectious bronchitis virus and Newcastle disease virus antibodies in backyard (free-range) village chickens in Mexico AB - The commercial flocks in Yucatan, Mexico are free of Newcastle disease virus (NDV) in its velogenic viscerotropic form, but little is known about the disease status of backyard poultry. A seroprevalence survey in 30 villages using haemagglutination inhibition (HI) tests for infectious bronchitis virus (IBV) and NDV antibodies was carried out from December 1997 to June 1998. The seroprevalences were 56.5% (95% CI 50-63%) for IBV and 2.2% (95% CI 0.5-3.8%) for NDV. All the villages had chickens that were positive for antibodies to IBV and nine of the villages had chickens that were positive for antibodies to NDV. This suggests that IBV may be responsible for a large proportion of the respiratory disease observed in backyard chickens in Yucatan. The implications of these findings are discussed, including the highly susceptible status of the backyard chickens in Yucatan to NDV and the possibility of this virus being one cause of the syndrome known as mortandad by the local people MH - United Kingdom MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0049-4747 UR - ISI:000165383600006 L2 - haemagglutination inhibition;infectious bronchitis;management;Newcastle disease;poultry;respiratory disease;seroprevalence;virus SO - Tropical Animal Health and Production 2000 ;32(6):381-390 889 UI - 15584 AU - Gutierrez CA AU - Moreno R AD - CSIC, Inst Ceram & Vidrio, Madrid 28500, SpainGutierrez, CA, CINVESTAV, IPN, Unidad Saltillo,POB 663, Saltillo 25000, Coahuila, Mexico TI - Tape casting of non-aqueous silicon nitride slips AB - Tape casting is a powerful method for the manufacturing of flat, large area ceramic components. Silicon nitride is a reference material for high temperature structural applications. Between them, thick film/coating technologies and ceramic-ceramic joining are receiving an increased attention. In this work, the rheological behavior on non-aqueous silicon nitride slips for tape casting was investigated considering different solvent and binding systems.. by controlling the total binder and plasticizer content and the binder to plasticizer ratio. A phosphate ester was used as dispersant. The characteristics of the green tapes obtained in different conditions were studied in terms of density, thickness and microstructure and related with the rheological properties of the slips. Once the slip properties were adjusted, manufacturing parameters, such as the casting speed and the gap between the blades and the carrier substrate, were also analyzed in order to improve the green tape properties and the process reliability. In order to obtain sinterable compacts, Al2O3 and Y2O3 were used as sintering aids. The effect of the sintering aids in both the rheological behavior and the green characteristics was also studied. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000088422700011 L2 - rheology;tape casting;microstructure-prefiring;Si3N4;COLLOIDAL FILTRATION; SURFACE OXIDATION; GREEN COMPACTS SO - Journal of the European Ceramic Society 2000 ;20(10):1527-1537 890 UI - 16134 AU - Gutierrez CG AU - Ralph JH AU - Telfer EE AU - Wilmut I AU - Webb R AD - Roslin Inst, Roslin EH25 9PS, Midlothian, ScotlandUniv Edinburgh, Sch Agr Bldg, Div Biol Sci, IERM, Edinburgh EH9 3JG, Midlothian, ScotlandUniv Nottingham, Sch Biol Sci, Div Agr & Hort, Loughborough LE12 5RD, Leics, EnglandGutierrez, CG, Fac Med Vet, Dept Reprod, Cd Univ, Mexico City 04510, DF, Mexico TI - Growth and antrum formation of bovine preantral follicles in long-term culture in vitro AB - Culture of preantral follicles has important biotechnological implications through its potential to produce large quantities of oocytes for embryo production and transfer. A long-term culture system for bovine preantral follicles is described. Bovine preantral follicles (166 +/- 2.15 pm), surrounded by theta cells, were isolated from ovarian cortical slices. Follicles were cultured under conditions known to maintain granulosa cell viability in vitro. The effects of epidermal growth factor (EGF), insulin-like growth factor (IGF)-I, FSH, and coculture with bovine granulosa cells on preantral follicle growth were analyzed. Follicle and oocyte diameter increased significantly (P < 0.05) with time in culture. FSH, IGF-I, and EGF stimulated (P < 0.05) follicle growth rate but had no effect on oocyte growth. Coculture with granulosa cells inhibited FSH/ICF-I-stimulated growth. Most follicles maintained their morphology throughout culture, with the presence of a thecal layer and basement membrane surrounding the granulosa cells. Antrum formation, confirmed by confocal microscopy, occurred between Days 10 and 28 of culture. The probability of follicles reaching antrum development was 0.19 for control follicles. The addition of growth factors or FSH increased (P < 0.05) the probability of antrum development to 0.55. Follicular growth appeared to be halted by slower growth of the basement membrane, as growing follicles occasionally burst the basement membrane, extruding their granulosa cells. In conclusion, a preantral follicle culture system in which follicle morphology can be maintained for up to 28 days has been developed. In this system, FSH, EGF, and IGF-I stimulated follicle growth and enhanced antrum formation. This culture system may provide a valuable approach for studying the regulation of early follicular development and for production of oocytes for nuclear/embryo transfer, but further work is required MH - United Kingdom MH - Mexico|Distrito Federal PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 73 U4 - Reproductive Biology U5 - J;Article AV - English IS - 0006-3363 UR - ISI:000086679400029 L2 - MOUSE OVARIAN FOLLICLES; DEVELOPMENT IN-VITRO; STIMULATING-HORMONE; GRANULOSA-CELLS; PRIMORDIAL FOLLICLES; ESTRADIOL PRODUCTION; MAMMALIAN OOGENESIS; OOCYTE MATURATION; MAINTENANCE; INVITRO SO - Biology of Reproduction 2000 ;62(5):1322-1328 891 UI - 15317 AU - Guzman-Marin R AU - Alam MN AU - Szymusiak R AU - Drucker-Colin R AU - Gong H AU - McGinty D AD - Vet Affairs Greater Los Angeles Healthcare Syst, N Hills, CA 91343, USAUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoUniv Calif Los Angeles, Dept Psychol, Los Angeles, CA 90024, USAUniv Calif Los Angeles, Sch Med, Dept Med, Los Angeles, CA 90024, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoMcGinty, D, Vet Affairs Greater Los Angeles Healthcare Syst, 16111 Plummer St, N Hills, CA 91343 USA TI - Discharge modulation of rat dorsal raphe neurons during sleep and waking: effects of preoptic/basal forebrain warming AB - In cats, putative serotonergic neurons (PSNs) recorded from the dorsal raphe nucleus (DRN) across the sleep-wake cycle exhibit the so-called rapid eye movement sleep-off (REM-off) discharge pattern. Since, the sleep-wake discharge patterns of DRN neurons in behaving rats is poorly known, the present study examined this neuronal populations. The PSNs recorded in this study exhibited: (1) progressive decrease in discharge rate from waking to NREM to REM sleep; (2) long action potential duration, and (3) reduction of discharge rate after systemic administration of a selective 5-HT1A agonist, (+/-)-8-hydroxy-2-(di-n-propylamino) tetralin hydrobromide (8-OH-DPAT). Evidence supports the hypothesis that NREM sleep is modulated by thermoregulatory mechanisms localized in the preoptic area and adjacent basal forebrain (POA/BF). We previously reported that POA/BF warming suppresses the discharge of wake-promoting neurons in the posterior hypothalamus and the basal forebrain. Since the DRN is one component of the brainstem arousal system and receives projections from POA/BF, we examined the effects of local POA/BF warming by 1.5-2.0 degrees C during waking on the discharge of DRN neurons. POA/BF warming reduced the discharge in 14 of 19 PSNs and in 12 of 17 other wake-related neurons in the DRN. DRN neuronal discharge reduction occurred without accompanying EEG frequency or behavioral changes. These results suggest that PSNs recorded in DRN in unrestrained and unanesthetized rats exhibit a "wake-active REM-off" discharge pattern and further support the hypothesis that the POA/BF warm-sensitive hypnogenic system induces sleep by a coordinated inhibition of multiple arousal systems including that modulated by the DRN. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000089199300003 L2 - preoptic area;basal forebrain;preoptic warming;serotonergic neurons;REM-off neuron;single unit recording;rat;EYE-MOVEMENT SLEEP; SINGLE-UNIT RESPONSES; FREELY MOVING CATS; THERMOSENSITIVE NEURONS; 5-HT1A AUTORECEPTORS; HYPOTHALAMIC NEURONS; NUCLEUS; SEROTONIN; CYCLE; WAKEFULNESS SO - Brain Research 2000 ;875(1-2):23-34 892 UI - 16012 AU - Guzman-Rojas L AU - Sims JC AU - Rangel R AU - Guret C AU - Sun Y AU - Alcocer JM AU - Martinez-Valdez H AD - Univ Texas, MD Anderson Canc Ctr, Dept Immunol, Houston, TX 77030, USASchering Plough, Lab Immunol Res, F-69571 Dardilly, FranceUniv Autonoma Nuevo Leon, Sch Biol Sci, Dept Immunol, Monterrey, NL, MexicoMartinez-Valdez, H, Univ Texas, MD Anderson Canc Ctr, Dept Immunol, Box 178,1515 Holcombe Blvd, Houston, TX 77030 USA TI - PRELI, the human homologue of the avian px19, is expressed by germinal center B lymphocytes AB - We report the identification of a human cDNA encoding a 25 kDa protein of relevant evolutionary and lymphoid interest (PRELI), PRELI was cloned by screening a B lymphocyte-specific cDNA library with a probe generated by mRNA differential display. PRELI amino acid sequence is 85% similar to the avian px19 protein, expressed within the blood islands and in the liver during avian embryo development. PRELI and px19 contain tandem repeats (A/TAEKAK) of the late embryogenesis abundant (LEA) motif, characteristic of a group of survival molecules and originally thought to be present only in plant proteins. Interestingly, PRELI expression is high in the fetal liver, a major site for B cell lymphopoiesis, while the mRNA levels in other fetal tissues such as the brain, lung, and kidney are comparatively low. At the adult stage, PRELI expression is drastically reduced in the liver but exhibits high mRNA levels in the spleen, brain, lung and kidney tissues, suggesting that PRELI expression may be important for the development of vital and immunocompetent organs. Moreover, PRELI is also highly expressed in the adult lymph nodes and peripheral blood leukocytes, further stressing that at the adult stage, PRELI expression may be important during secondary immune responses. Consistent with this hypothesis, the expression of PRELI is predominant within germinal centers (GC), a stage in which B lymphocytes are under a stressful selection pressure, Taken together these data: (i) strongly support the notion that the conserved LEA motif represents a phylogenetic link between plants and animals, (ii) reveal a novel molecule whose expression may play a role in the maturation of distinct human tissues, and (iii) suggest that PRELI expression may be important for GC B lymphocytes MH - France MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 10 U4 - Immunology U5 - J;Article AV - English IS - 0953-8178 UR - ISI:000087129100003 L2 - B lymphocytes;cDNA cloning;germinal centers;LEA motif;phylogeny;MESSENGER-RNA; ABSCISIC-ACID; CELL-LINE; GENE; LEA; STRESS; MOLECULE; SEQUENCE; PROTEINS; SURFACE SO - International Immunology 2000 ;12(5):607-612 893 UI - 16236 AU - Guzman-Speziale M AU - Ni JF AD - UNAM, Inst Geofis, Unidad Ciencias Tierra, Juriquilla 76230, Queretaro, MexicoNew Mexico State Univ, Dept Phys, Geophys Program, Las Cruces, NM 88003, USAGuzman-Speziale, M, UNAM, Inst Geofis, Unidad Ciencias Tierra, Campus Juriquilla, Juriquilla 76230, Queretaro, Mexico TI - Comment on "Subduction in the Indo-Burma region: Is it still active?" by S. P. Satyabala MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0094-8276 UR - ISI:000086224500041 L2 - TECTONICS; EARTHQUAKES; GEOMETRY SO - Geophysical Research Letters 2000 ;27(7):1065-1066 894 UI - 16551 AU - Guzman G AU - Ovrebo CL AD - Inst Ecol, Xalapa 91000, Veracruz, MexicoUniv Cent Oklahoma, Dept Biol, Edmond, OK 73034, USAGuzman, G, Inst Ecol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - New observations on sclerodermataceous fungi AB - New records and a new section are reported for the genus Scleroderma (Basidiomycotina, Sclerodermataceae). Scleroderma sinnamariense is registered for the first time from Costa Rica and is moved from section Sclerangium to section Scleroderma for the well developed reticulum on the spores. Scleroderma echinatum is reported from Panama and the new section Caloderma is proposed to accommodate it. Scleroderma meridionale is reported from Mississippi (USA). Scleroderma septentrionale is reported for first time from North America. It was only known from northern Europe, and as S. macrorhizon in northern USA. Veligaster nitidum (Sclerodermataceae) is reported for the first time from Panama and from a new locality in Jalisco (Mexico) MH - Mexico|Veracruz MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000085130200019 L2 - Gasteromycetes;new section;scleroderma;Veligaster SO - Mycologia 2000 ;92(1):174-179 895 UI - 15321 AU - Haas DW AU - Arathoon E AU - Thompson MA AU - Pedro RD AU - Gallant JE AU - Uip DE AU - Currier J AU - Noriega LM AU - Lewi DS AU - Uribe P AU - Benetucci J AU - Cahn P AU - Paar D AU - White CA AU - Collier AC AU - Ramirez-Ronda CH AU - Harvey C AU - Chung M AU - Mehrotra D AU - Chodakewitz J AU - Nguyen BY AD - Vanderbilt Univ, Sch Med, Div Infect Dis, Nashville, TN 37212, USAGuatemalan Assoc Prevent & Control AIDS, Clin Familiar Luis Angel Garcia, Guatemala City, GuatemalaAIDS Res Consortium Atlanta, Atlanta, GA, USAUniv Estadual Campinas, Fac Ciencias Med, Sao Paulo, BrazilJohns Hopkins Univ, Baltimore, MD, USAUniv Sao Paulo, Sao Paulo, BrazilUniv So Calif, Los Angeles, CA, USAHosp Dr Sotero del Rio, Santiago, ChileUniv Fed Sao Paulo, Sao Paulo, BrazilCONASIDA, Mexico City, DF, MexicoHosp Muniz, Buenos Aires, DF, ArgentinaHuesped Fdn, Buenos Aires, DF, ArgentinaUniv Texas, Galveston, TX 77555, USABaylor Coll Med, Houston, TX 77030, USAUniv Washington, Sch Med, Seattle, WA, USAVet Adm Med Ctr, San Juan, PR, USAMerck Res Labs, West Point, PA, USAHaas, DW, Vanderbilt Univ, Sch Med, Div Infect Dis, 1211 21st Ave S,Suite 539, Nashville, TN 37212 USA TI - Comparative studies of two-times-daily versus three-times-daily indinavir in combination with zidovudine and lamivudine AB - Objectives: To compare the efficacy and safety of two-times-daily versus three-times-daily indinavir in combination with zidovudine and lamivudine. Design: Two multicenter, open-label, randomized 24-week studies. Methods: Adults HIV-1 infection, HIV-1 RNA greater than 10 000 copies/ml, and no prior lamivudine or protease inhibitor therapy were eligible. In a pilot study (Study A), patients received indinavir at 800 mg every 8 h, 1000 mg every 12 h, or 1200 mg every 12 h. In a subsequent study (Study B), patients received indinavir at 800 mg every 8 h or 1200 mg every 12 h. All subjects received zidovudine (300 mg) and lamivudine (150 mg) every 12 h. An intent-to-treat analysis was used. Results: In Study A, which enrolled 88 patients, neither HIV-1 RNA nor CD4, cell responses differed significantly between treatment groups at 24 weeks when corrected for multiple comparisons. Study B enrolled 433 patients, but was prematurely discontinued when interim analysis suggested greater efficacy of three-times-daily indinavir. Of the first 87 patients reaching week 24, HIV-1 RNA was less than 400 copies/ml in 91% receiving three-times-daily versus 64% receiving two-times daily indinavir (P < 0.01). Conclusion: Three-limes-daily indinavir appears more efficacious than two-times-daily dosing when administered with zidovudine and lamivudine. Two-times-daily indinavir dosing should only be considered in situations characterized by favorable pharmacokinetic drug-drug interactions. (C) 2000 Lippincott Williams & Wilkins MH - Argentina MH - Brazil MH - Chile MH - Guatemala MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 13 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0269-9370 UR - ISI:000089180700013 L2 - antiretroviral therapy;indinavir;clinical trial;zidovudine;lamivudine;HIV infection;viral load;HIV protease inhibitors;IMMUNODEFICIENCY-VIRUS INFECTION; HIV-1 RNA LEVELS; ANTIRETROVIRAL THERAPY; CUBIC MILLIMETER; PLUS INDINAVIR; VIRAL LOAD; PLASMA; MARKERS; ADULTS; INITIATION SO - Aids 2000 ;14(13):1973-1978 896 UI - 14569 AU - Haffner SM AU - Williams K AU - Tracy RP AU - Gonzalez-Villalpondo C AU - Stern MP AD - Univ Texas, Hlth Sci Ctr, San Antonio, TX, USAUniv Vermont, Sch Med, Colchester, VT, USACtr Estudios Diabet, Mexico City, DF, Mexico TI - C-reactive protein: An independent risk factor for type 2 diabetes in the Mexico City Diabetes Study MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000090072304165 SO - Circulation 2000 ;102(18):871-871 897 UI - 16204 AU - Haiduc I AU - Zukerman-Schpector J AU - Castellano E AU - Cea-Olivares R AD - Univ Babes Bolyai, Fac Chim, R-3400 Cluj Napoca, RomaniaUniv Fed Sao Carlos, Dept Quim, Lab Cristallog, BR-13560 Sao Carlos, SP, BrazilUniv Fed Sao Carlos, Dept Fis, BR-13560 Sao Carlos, SP, BrazilUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoHaiduc, I, Univ Babes Bolyai, Fac Chim, R-3400 Cluj Napoca, Romania TI - A spirobicyclic complex of Schmidpeter's ligand, bis(tetraphenylimidodiphosphinato) beryllium, Be(OPh2PNPPh2O)(2), an inorganic analog of beryllium bis(beta-diketonates) AB - The crystal structure of bis(tetraphenylimidodiphosphinato)beryllium (as a benzene solvate), Be(OPh2PNPPh2O)(2). C6H6, was determined by X-ray diffraction and compared with that of beryllium acetylacetonate, Be(OCMeCHCMeO)(2). The imidodiphosphinate is an inorganic spirobicyclic system. Be(OPNPO)(2), with tetrahedrally coordinated beryllium. Unlike the planar BeO2C3 rings in the acetylacetonate, the two six-membered BeO2P2N inorganic rings are nonplanar and display a skew boat conformation. (C) 2000 John Wiley & Sons, Inc MH - Brazil MH - Mexico|Distrito Federal MH - Romania PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1042-7163 UR - ISI:000086489300014 L2 - FREE CHELATE RINGS; CRYSTAL-STRUCTURES; MOLECULAR-STRUCTURES; DERIVATIVES; PHOSPHORUS; CHEMISTRY; NITROGEN; ACID SO - Heteroatom Chemistry 2000 ;11(3):244-248 898 UI - 15955 AU - Hakioglu T AU - Wolf KB AD - Ctr Int Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoHakioglu, T, Bilkent Univ, Dept Phys, TR-06533 Ankara, Turkey TI - The canonical Kravchuk basis for discrete quantum mechanics AB - The well known Kravchuk formalism of the harmonic oscillator obtained from the direct discretization method is shown to be a new way of formulating discrete quantum phase space. it is shown that the Kravchuk oscillator Hamiltonian has a well defined unitary canonical partner which we identify with the quantum phase of the Kravchuk oscillator. The generalized discrete Wigner function formalism based on the action and angle variables is applied to the Kravchuk oscillator and its continuous limit is examined MH - Mexico|Morelos MH - Turkey PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000087274800018 L2 - OPERATIONAL APPROACH; ALGEBRAIC APPROACH; PHASE; FIELD SO - Journal of Physics A-Mathematical and General 2000 ;33(16):3313-3323 899 UI - 14575 AU - Halary E AU - Haro-Poniatowski E AU - Benvenuti G AU - Hoffmann P AD - Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, BM, Inst Appl Opt, CH-1015 Lausanne, SwitzerlandUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 55534, DF, MexicoHoffmann, P, Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, BM, Inst Appl Opt, CH-1015 Lausanne, Switzerland TI - Crystallinity of titania thin films deposited by light induced chemical vapor deposition AB - Titanium dioxide thin films were deposited from titanium tetraisopropoxide in an oxygen atmosphere by light induced chemical vapor deposition (LICVD), using a 308 nm XeCl excimer laser We report on the influence of substrate holder temperature at a low fluence (150 mJ/cm(2)) on the deposition on glass substrates. The growth rate follows an Arrhenius behavior between 120 and 210 degreesC, corresponding to an activation energy of the deposition reaction of 20 kJ/mol. XRD and Raman spectroscopy detected a mixture of anatase and rutile crystals, possibly in an amorphous material. With increasing substrate temperature, the crystallinity is enhanced and the ratio, anatase/rutile increases. (C) 2000 published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000166184400016 L2 - titanium dioxide;CVD;excimer laser;titanium tetraisopropoxide (CAS : 546-68-9);photo-deposition;TIO2; GROWTH; OXIDE SO - Applied Surface Science 2000 ;168(1-4):61-65 900 UI - 15487 AU - Halfar J AU - Godinez-Orta L AU - Ingle JC AD - Stanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305, USACtr Interdisciplinario Ciencias Marinas, La Paz 23000, BCS, MexicoHalfar, J, Univ Stuttgart, Inst Geol & Palaontol, Herdweg 51, D-70174 Stuttgart, Germany TI - Microfacies analysis of recent carbonate environments in the Southern Gulf of California, Mexico - A model for warm-temperate to subtropical carbonate formation AB - The La Pat area in the southwestern Gulf of California, Mexico, provides an ideal site for studying Recent warm-temperate to subtropical carbonate environments. Carbon ate factories include small pocket bays, a rhodolith dominated carbonate shelf; and a mixed-carbonate siliciclastic high-energy beach. Underwater mapping and constituent analysis have revealed free-living coralline red algae in the form of rhodoliths to be the main carbonate producers, contributing 33% of the biogenic constituents to the sediment. Other significant contributions come from corals (20%), molluscs (18%) echinoderms (5%), and benthic foraminifera (4%). The benthic foraminiferal community includes mixtures of tropical and temperate species. This compositional pattern stands in marked contrast to (1) better-studied coral and green algae dominated tropical carbonate systems and (2) foraminifer, bryozoan, and mollusc dominated cool-water carbonates. Cluster analyses of biogenic constituents and benthic foraminifera revealed distinctive coral, coralline red algal, and molluscan microfacies. However, subdivisions characterized by benthic foraminifera more closely reflect the bottom facies observed during underwater mapping as opposed to patterns defined by cluster analysis of biogenic components. Diagnostic features for interpreting similar environments found in the fossil record include the (li co-occurrence of coralline red algae and corals together with the absence of calcareous green algae, (2) presence of 5-10 genera of Larger benthic foraminifera, (3) laterally and vertically not extensive character of environments, and (4) changes of microfacies over short distances MH - Germany MH - Mexico|Baja California Sur MH - USA PB - TULSA: SEPM-SOC SEDIMENTARY GEOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0883-1351 UR - ISI:000088629400006 L2 - COOL-WATER; REEF FACIES; SHELF; LIMESTONES; SEDIMENTS; MIOCENE; RAMP; CLASSIFICATION; LITHOFACIES; AUSTRALIA SO - Palaios 2000 ;15(4):323-342 901 UI - 15590 AU - Halhali A AU - Tovar AR AU - Torres N AU - Bourges H AU - Garabedian M AU - Larrea F AD - Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Physiol Nutr, Mexico City 14000, DF, MexicoHop St Vincent de Paul, CNRS, UPR 1524, F-75674 Paris, FranceHalhali, A, Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Vasco Quiroga 15,Col Tlalpan, Mexico City 14000, DF, Mexico TI - Preeclampsia is associated with low circulating levels of insulin-like growth factor I and 1,25-dihydroxyvitamin D in maternal and umbilical cord compartments AB - Insulin-like growth factor I(IGF-I) stimulates renal and placental 1,25-dihydroxyvitamin D [1,25-(OH)(2)D] and is considered an important regulator of fetal growth. As 1,25-(OH)(2)D and birth weight are low in preeclampsia, this study was undertaken to determine whether circulating levels of IGF-I were associated with serum 1,25-(OH)(2)D concentrations in preeclamptic (PE group) and normotensive (NT group) pregnancies. Maternal and umbilical cord serum levels of IGF-I and 1,25-(OH)(2)D were significantly (P < 0.01) lower in the PE group than in the NT group. The concentrations of these two hormones correlated significantly in the umbilical cord (P < 0.05) and in the maternal (P < 0.001) compartments of the PE and NT groups, respectively. The amount of IGFBP-3 was 64% lower whereas that of IGFBP-1 was 2.9-fold higher in umbilical cord serum of the PE group compared with the NT group. In addition, maternal and umbilical cord serum IGF-I correlated significantly (P < 0.05) with weight and length at birth only in the PE group. In conclusion, the results of this study indicate that circulating IGF-I and 1,25-(OH)(2)D levels in both maternal and umbilical cord compartments are low in preeclampsia. Furthermore, this study suggests a differential regulatory effect of IGF-I on 1,25-(OH)(2)D synthesis and fetal growth depending on the presence or absence of preeclampsia MH - France MH - Mexico|Distrito Federal PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 31 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000088387300017 L2 - FACTOR BINDING-PROTEINS; INTRAUTERINE GROWTH; HUMAN PLACENTA; HUMAN-FETUS; IGF-I; BONE METABOLISM; HUMAN-PREGNANCY; PRE-ECLAMPSIA; FETAL GROWTH; KIDNEY-CELLS SO - Journal of Clinical Endocrinology and Metabolism 2000 ;85(5):1828-1833 902 UI - 15286 AU - Han WQ AU - Kohler-Redlich P AU - Seeger T AU - Ernst F AU - Ruhle M AU - Grobert N AU - Hsu WK AU - Chang BH AU - Zhu YQ AU - Kroto HW AU - Walton DRM AU - Terrones M AU - Terrones H AD - Max Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUniv Sussex, CPES, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoHan, WQ, Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720, USA TI - Aligned CNx nanotubes by pyrolysis of ferrocene/C-60 under NH3 atmosphere AB - Aligned CNx (x < 0.1) nanotubes have been generated by pyrolyzing ferrocene/C-60 mixtures at 1050 degrees C in an ammonia atmosphere. The structure and composition of the product were determined by high-resolution transmission electron microscopy and high spatial resolution electron energy-loss spectroscopy. The CNx tubes (15-70 nm diameter, < 50 mu m length) grown in large flakes (< 3 mm(2)) consist of a reduced number of "graphitic" layers (< 15 on either side) arranged in a bamboo-like structure. Areas of high nitrogen concentration were found within curved or corrugated "graphite-like" domains. The observation of a well-developed double peak in the sigma* feature of the N K-edge suggests that the material has not undergone the transition to the fullerene-like phase known for nitrogenated carbons. Incorporation of nitrogen from the gas phase (NH3) into CNx nanotubes therefore leads to improved and more efficient N substitution into the network as compared to the synthesis with solid nitrogen-containing precursors reported earlier. (C) 2000 American Institute of Physics. [S0003-6951(00)04638-6] MH - United Kingdom MH - Germany MH - Mexico|Queretaro MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 70 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000089239000023 L2 - BORON-NITRIDE NANOTUBES; B-C-N; CARBON NITRIDE; GRAPHITIC CARBON SO - Applied Physics Letters 2000 ;77(12):1807-1809 903 UI - 15767 AU - Hannush SB AU - Riveroll L AD - Wills Eye Hosp, Cornea Serv, Langhorne, PA, USAHAPEC, Cornea Serv, Mexico City, DF, Mexico TI - Ten year experience with transsclerally sutured posterior chamber intraocular lens implantation MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246702602 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S489-S489 904 UI - 15151 AU - Hargrove MS AU - Brucker EA AU - Stec B AU - Sarath G AU - rredondo-Peter R AU - Klucas RV AU - Olson JS AU - Phillips GN AD - Iowa State Univ Sci & Technol, Dept Biochem Biophys & Mol Biol, Ames, IA 50011, USABaxter Hemoglobin Therapeut, Boulder, CO 80301, USARice Univ, WM Keck Ctr Computat Biol, Dept Biochem & Cell Biol, Houston, TX 77005, USAUniv Nebraska, Dept Biochem, Lincoln, NE 68588, USACtr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoHargrove, MS, Iowa State Univ Sci & Technol, Dept Biochem Biophys & Mol Biol, Ames, IA 50011 USA TI - Crystal structure of a nonsymbiotic plant hemoglobin AB - Background: Nonsymbiotic hemoglobins (nsHbs) form a new class of plant proteins that is distinct genetically and structurally from leghemoglobins. They are found ubiquitously in plants and are expressed in low concentrations in a variety of tissues including roots and leaves. Their function involves a biochemical response to growth under limited O-2 conditions. Results: The first X-ray crystal structure of a member of this class of proteins, riceHb1, has been determined to 2.4 Angstrom resolution using a combination of phasing techniques. The active site of ferric riceHb1 differs significantly from those of traditional hemoglobins and myoglobins. The proximal and distal histidine sidechains coordinate directly to the heme iron, forming a hemichrome with spectral properties similar to those of cytochrome b(5). The crystal structure also shows that riceHb1 is a dimer with a novel interface formed by close contacts between the G helix and the region between the B and C helices of the partner subunit. Conclusions: The bis-histidyl heme coordination found in riceHb1 is unusual for a protein that binds O-2 reversibly. However, the distal His73 is rapidly displaced by ferrous ligands, and the overall O-2 affinity is ultra-high (K-D approximate to 1 nM). Our crystallographic model suggests that ligand binding occurs by an upward and outward movement of the E helix, concomitant dissociation of the distal histidine, possible repacking of the CD corner and folding of the D helix. Although the functional relevance of quaternary structure in nsHbs is unclear, the role of two conserved residues in stabilizing the dimer interface has been identified MH - USA MH - Mexico|Morelos PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 88 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0969-2126 UR - ISI:000089534300012 L2 - anaerobic response;hemoglobin;nonsymbiotic;plant;structure;SPERM WHALE MYOGLOBIN; NITRIC-OXIDE; CARBON-MONOXIDE; LEGHEMOGLOBIN; GENE; FLAVOHEMOGLOBIN; DISSOCIATION; PARASPONIA; RESOLUTION; KINETICS SO - Structure 2000 ;8(9):1005-1014 905 UI - 15907 AU - Harvey PM AU - Butner HM AU - Colome C AU - Di Francesco J AU - Smith BJ AD - Univ Texas, Dept Astron, Austin, TX 78712, USAUniv Arizona, Steward Observ, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Astron, Radio Astron Lab, Berkeley, CA 94720, USAE Tennessee State Univ, Dept Phys, Johnson City, TN 37614, USAHarvey, PM, Univ Texas, Dept Astron, RLM 15308, Austin, TX 78712, USA TI - Far-infrared observations of AFGL 2136: Simple dust toroid models AB - We report on high angular resolution observations of AFGL 2136 at 50 and 100 mu m from NASA's Kuiper Airborne Observatory. Our data consist of diffraction-limited scans in two orthogonal directions as well as photometry. The far-infrared (FIR) emission is very compact with an unresolved core and also exhibits low surface brightness wings that extend out to a radius of order 70" at 100 mu m. We have attempted to fit our observations and the photometry and size data at other wavelengths with simple, dust envelope models in order to place limits on the quantity and distribution of dust around AFGL 2136. Spherically symmetric models cannot fit the data, but we show that a simple approximation to a toroidal dust distribution can fit the energy distribution and size data rather well. The successful models imply a density gradient in the cloud of order rho proportional to r(-15) and optical depth at 100 mu m of order unity MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087429400029 L2 - circumstellar matter;infrared : ISM : continuum;reflection nebulae;RESOLUTION; GL-2136; YOUNG; STARS SO - Astrophysical Journal 2000 ;534(2):846-853 906 UI - 15433 AU - Hay BP AU - Dixon DA AU - Vargas R AU - Garza J AD - Pacific NW Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, Mexico TI - Metal-ion complementarity in a series of tris-catecholamides MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246103920 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U734-U734 907 UI - 14774 AU - Hayashi N AU - Kaikina EI AU - Naumkin PI AD - Sci Univ Tokyo, Dept Appl Math, Tokyo 1628601, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoHayashi, N, Sci Univ Tokyo, Dept Appl Math, Tokyo 1628601, Japan TI - Large time behaviour of solutions to the dissipative nonlinear Schrodinger equation AB - We study the Cauchy problem for the nonlinear Schrodinger equation with dissipation [GRAPHICS] where L is a linear pseudodifferential operator with dissipative symbol Re L(xi) greater than or equal to C-1\xi\(2)/(1 + xi (2)) and \L'(xi)\ less than or equal to C-2(\xi\ + \xi\(n)) for all xi is an element of R. Here, C-1,C-2 > 0, n greater than or equal to 1. Moreover, we assume that L(xi) = alpha xi (2) + O(\xi\(2+gamma)) for all \xi\ < 1, where > 0, Re alpha > 0, Im alpha greater than or equal to 0. When L(xi) = alpha xi (2), equation (A) is the nonlinear Schrodinger equation with dissipation u(t) - au(xx) + i\u\(2)u = 0. Our purpose is to prove that solutions of (A) satisfy the time decay estimate \\u(t)\\(infinity) less than or equal to C(1 + t)(-1/2)(1 + log(1 + t))(-1/2 sigma) under the conditions that u(0) is an element of H-n,H-0 boolean AND H-0,H-1 have the mean value and the norm \\u(0)\\(Hn,0) + \\u(0)\\(H0,1) = epsilon is sufficiently small, where sigma = 1 if Im alpha > 0 and sigma = 2 if Im alpha = 0, and (u) over cap (0)(0) = 1/root (2)pi integralu(0)(x)dx not equal 0 H-m,H-s = {phi is an element of S'; \\phi\\(m,s) = \\(1 + x(2))(s/2)(1 - partial derivative (2)(x))(m/2)phi\\ < }, m,s is an element of R. Therefore, equation (A) is considered as a critical case for the large-time asymptotic behaviour because the solutions of the Cauchy problem for the equation u(t) - au(xx) + i\u\(p-1)u = 0, with p > 3 have the same time decay estimate \\u\\(L)infinity = O(t(-1/2)) as that of solutions to the linear equation. On the other hand, note that solutions of the Cauchy problem (A) have an additional logarithmic time decay. Our strategy of the proof of the large-time asymptotics of solutions is to translate (A) to another nonlinear equation in which the mean value of the nonlinearity is zero for all time MH - Japan MH - Mexico|Michoacan PB - EDINBURGH: ROYAL SOC EDINBURGH RP - NOT IN FILE U3 - TC 23 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0308-2105 UR - ISI:000165626500007 L2 - CONVECTION-DIFFUSION EQUATIONS; ASYMPTOTIC-BEHAVIOR; CONSERVATION-LAWS; WAVE-EQUATIONS; DECAY; RN SO - Proceedings of the Royal Society of Edinburgh Section A-Mathematics 2000 ;130():1029-1043 908 UI - 16370 AU - Hayashi N AU - Naumkin PI AD - Sci Univ Tokyo, Dept Appl Matemat, Shinjuku Ku, Tokyo 1628601, JapanUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoHayashi, N, Sci Univ Tokyo, Dept Appl Matemat, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan TI - On the quadratic nonlinear Schrodinger equation in three space dimensions MH - Japan MH - Mexico|Michoacan PB - DURHAM: DUKE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1073-7928 UR - ISI:000085925000002 L2 - LINEAR EVOLUTION-EQUATIONS; GLOBAL EXISTENCE; TIME SO - International Mathematics Research Notices 2000 ;(3):115-132 909 UI - 15236 AU - Hayes PM AU - Corey AE AU - Dovel R AU - Karow R AU - Mundt C AU - Rhinart K AU - Vivar H AD - Oregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97731, USAOregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97731, USACIMMYT, ICARDA, Mexico City 06600, DF, MexicoHayes, PM, Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97731 USA TI - Registration of 'Orca' barley MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000089410400044 L2 - F-SP HORDEI; STRIPE RUST; RESISTANCE SO - Crop Science 2000 ;40(3):849-851 910 UI - 15231 AU - Healey MC AU - Thomson KA AU - Leblond PH AU - Huato L AU - Hinch SG AU - Walters CJ AD - Univ British Columbia, Dept Oceanog, Vancouver, BC V6T 1Z4, CanadaUniv British Columbia, Fisheries Ctr, Vancouver, BC V6T 1Z4, CanadaInst Politecn Nacl, Ctr Interdisciplinaro Ciencias Marinas, La Paz, BCX, MexicoUniv British Columbia, Dept Forest Sci, Vancouver, BC V6T 1Z4, CanadaHealey, MC, Univ British Columbia, Dept Earth & Ocean Sci, Vancouver, BC V6T 1Z4, Canada TI - Computer simulations of the effects of the Sitka eddy on the migration of sockeye salmon returning to British Columbia AB - The Sitka eddy is a mesoscale eddy, 300 km in diameter, that develops off SE Alaska in about one year in two. The eddy has surface currents exceeding 50 km day(-1) and it has been suggested that the eddy could deflect migrating salmon to the south, thereby reducing the proportion of British Columbia (BC) sockeye salmon accessible to Alaskan fishers. We modelled its effects on the migration of sockeye salmon (Oncorhynchus nerka) returning to northern BC, using an individual-based model to simulate migration paths, migration timing and metabolic costs of salmon with different migration behaviours. Except when their migration behaviour included positive rheotaxis, salmon that encountered the eddy had faster migration times and lower metabolic costs than those that did not. The least complex migration behaviour, compass orientation with no rheotaxis, was only slightly less efficient in metabolic terms than the optimal migration paths determined by dynamic programming. Our simulations show that the Sitka eddy itself does not deflect migrating salmon to the south or south-east regardless of migration behaviour, but that by interrupting the normal northward flow of the Alaskan Current, the eddy could influence latitude of landfall of migrating salmon MH - Canada MH - Mexico|Baja California Sur PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Fisheries;Oceanography U5 - J;Article AV - English IS - 1054-6006 UR - ISI:000089400500007 L2 - bioenergetics;individual-based modelling;mesoscale eddies;Sitka eddy;sockeye salmon migration;NORTHEAST PACIFIC-OCEAN; FRASER-RIVER; ONCORHYNCHUS-NERKA; BIOENERGETICS; ALASKA; MODEL SO - Fisheries Oceanography 2000 ;9(3):271-281 911 UI - 16090 AU - Heinemann JA AU - Ankenbauer RG AU - mabile-Cuevas CF AD - Univ Canterbury, Dept Plant & Microbial Sci, Christchurch 1, New ZealandPfizer Cent Res, Groton, CT 06340, USAFdn LUSARA Invest Cient AC, Mexico City 08930, DF, MexicoHeinemann, JA, Univ Canterbury, Dept Plant & Microbial Sci, Christchurch 1, New Zealand TI - Do antibiotics maintain antibiotic resistance? AB - Important human pathogens resistant to antibiotics result from the human use of antibiotics. Does this imply that reducing their usage or removing antibiotics from medicine and agriculture will restore the effectiveness of these drugs? The authors argue that resistance evolution and susceptibility evolution are not, in a sense, just different sides of the same coin. Resistance genes acquire new functions and the initial costs of resistance can evolve into advantages. Decreasing drug use might not replace a fundamental change in drug design to avoid the evolution of resistant, and encourage the evolution of susceptible, microorganisms MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 25 U4 - Pharmacology & Pharmacy U5 - J;Review AV - English IS - 1359-6446 UR - ISI:000086755000014 L2 - GRAM-NEGATIVE BACTERIA; OUTER-MEMBRANE PROTEIN; ESCHERICHIA-COLI; RIBOSOMAL-RNA; ANTIMICROBIAL RESISTANCE; TETRACYCLINE RESISTANCE; SALMONELLA-TYPHIMURIUM; AMINOGLYCOSIDE RESISTANCE; GLYCOPEPTIDE RESISTANCE; CLOSTRIDIUM-PERFRINGENS SO - Drug Discovery Today 2000 ;5(5):195-204 912 UI - 15506 AU - Henaut Y AU - Alauzet C AU - Ferran A AU - Williams T AD - Univ Toulouse 3, Lab Neurobiol & Comportement, F-31062 Toulouse, FranceColegio Frontera Sur, Tapachula, Chiapas, MexicoInst Natl Rech Agron, Lab Invertebrate Biol, F-06600 Antibes, FranceHenaut, Y, Univ Toulouse 3, Lab Neurobiol & Comportement, 118 Route Narbonne, F-31062 Toulouse, France TI - Effect of nymphal diet on adult predation behavior in Orius majusculus (Heteroptera : Anthocoridae) AB - The predatory bug Orius majusculus (Reuter) was reared on 2 different diets during the nymphal stages. The ist group was exclusively offered eggs of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae), a standard diet for O. majusculus production The 2nd group was exclusively offered 4th instars of the pea aphid, Acyrtosiphon pisum (Harris). Subsequently, adult predatory behavior in experimental arenas containing A. pisium was recorded using 2 video cameras. One camera permitted observation of the predator's contact with the prey, where the 2nd camera viewed the arena from above to record the path taken by O. majusculus adults before and after contact with prey. When O. majusculus were reared on aphids, adult bugs successfully located and consumed 55% of experimental prey and continued prey search behavior after each al,hid meal. O. majusculus adults that had no experience of aphid predation as nymphs, did not prey on aphids in the experimental arena The mean walking speed of this group of predators increased from 5.9 +/- 1.2 mm/s to 9.8 +/- 0.7 mm/s after contact or detection of prey, indicating that predators rapidly moved away from unfamiliar prey. Moreover, for egg-reared O, majusculus, all contacts between aphid and predator were lateral, along the side of the prey and were effectively repelled by an aphid kicking response. In contrast, 83% of attacks by aphid-reared O, majusculus were directed at the head or posterior abdomen for which the prey could not defend themselves adequately. When egg-reared O. majusculus were exposed to novel aphid prey for 1-8 d, the frequency of aphid attack increased significantly. We conclude that the standard diet used for rearing O. majusculus may adversely affect the efficiency of this predator as an agent of biological control MH - France MH - Mexico|Chiapas PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000088598900010 L2 - Orius majusculus;aphid;biological control;lepidopteran eggs;immature diet;feeding behavior;ORIENTATION; EXPERIENCE; SEARCH SO - Journal of Economic Entomology 2000 ;93(2):252-255 913 UI - 15079 AU - Henderson D AU - Garcia I AU - Sokolowski S AU - Trokhymchuk A AD - Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USANatl Autonomous Univ Mexico, Direcc Gen Serv Comp Acad, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Fac Chem, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Acad Sci Ukraine, Inst Condensed Matter Phys, UA-290011 Lviv, UkraineHenderson, D, Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA TI - Overlapping associating fluids with directional bonds in a bulk and near a hard wall: Monte Carlo study AB - Two models have been used in these Monte Carlo simulations: the original model with an angular-dependent associative interaction and a model with an angular-averaged potential, which is better suited For simulation and computationaly more efficient. We show that in the homogeneous case under the same conditions, both models yield a nearly identical interparticle structure, but with a slightly different degree of dimerization. This causes differences between these models in the local density distribution of monomers and dimers when ail inhomogeneity is present. though the resulting local total density distribution is found to be the same. The theoretical predictions based on Wertheim's theory of association are always closer to the simulation data For the model with the angular-averaged potential MH - Mexico|Distrito Federal MH - Poland MH - Ukraine MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-4715 UR - ISI:000089739400011 L2 - associating fluids;directional bonding;structure;local density distribution;ATTRACTIVE FORCES; INTEGRAL-EQUATIONS; PRIMITIVE MODELS; SIMULATION; SITES; MIXTURES SO - Journal of Statistical Physics 2000 ;100(1-2):153-166 914 UI - 14487 AU - Henderson IR AU - Cappello R AU - Nataro JP AD - Queens Univ Belfast, Dept Microbiol & Immunobiol, Belfast BT12 6BN, Antrim, North IrelandCtr Invest Ciencia Aplicada & Tecnol Avanzada, Inst Politecn Nacl, Mexico City 11500, DF, MexicoUniv Maryland, Sch Med, Ctr Vaccine Dev, Dept Pediat, Baltimore, MD 21201, USAHenderson, IR, Queens Univ Belfast, Dept Microbiol & Immunobiol, Grosvenor Rd, Belfast BT12 6BN, Antrim, North Ireland TI - Autotransporter proteins, evolution and redefining protein secretion MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 61 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Editorial Material AV - English IS - 0966-842X UR - ISI:000166425100001 L2 - GRAM-NEGATIVE BACTERIA; ESCHERICHIA-COLI; HEMOLYSIN; PATHWAYS SO - Trends in Microbiology 2000 ;8(12):529-532 915 UI - 14488 AU - Henderson IR AU - Cappello R AU - Nataro JP AD - Queens Univ Belfast, Dept Microbiol & Immunobiol, Belfast BT12 6BN, Antrim, North IrelandIPN, CICATA, Mexico City 11500, DF, MexicoUniv Maryland, Sch Med, Ctr Vaccine Dev, Dept Pediat, Baltimore, MD 21201, USAHenderson, IR, Queens Univ Belfast, Dept Microbiol & Immunobiol, Grosvenor Rd, Belfast BT12 6BN, Antrim, North Ireland TI - Autotransporter proteins, evolution and redefining protein secretion: Response MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Editorial Material AV - English IS - 0966-842X UR - ISI:000166425100003 SO - Trends in Microbiology 2000 ;8(12):534-535 916 UI - 15647 AU - Henning PA AU - Staveley-Smith L AU - Ekers RD AU - Green AJ AU - Haynes RF AU - Juraszek S AU - Kesteven MJ AU - Koribalski B AU - Kraan-Korteweg RC AU - Price RM AU - Sadler EM AU - Schroder A AD - Univ New Mexico, Inst Astrophys, Albuquerque, NM 87131, USACSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, AustraliaUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoObserv Cote Azur, F-06304 Nice, FranceHenning, PA, Univ New Mexico, Inst Astrophys, 800 Yale Blvd NE, Albuquerque, NM 87131 USA TI - H (I)-bright galaxies in the southern zone of avoidance AB - A blind survey for H I-bright galaxies in the southern zone of avoidance (212 degrees less than or equal to l less than or equal to 36 degrees, \b\ less than or equal to 5 degrees) has been made with the 21 cm multibeam receiver on the Parkes 64 m radio telescope. The survey, sensitive to normal spiral galaxies to a distance of similar to 40 Mpc and more nearby dwarfs, detected 110 galaxies. Of these, 67 have no counterparts cataloged in the NASA/IPAC Extragalactic Database. In general, the uncataloged galaxies lie behind thicker obscuration than do the cataloged objects. All the newly discovered galaxies have H I flux integrals that are more than an order of magnitude lower than those of the Circinus galaxy. The survey recovers the Puppis Cluster and foreground group, and the Local Void remains empty. The H I mass function derived for the sample is satisfactorily fitted by a Schechter function with parameters alpha = 1.51 +/- 0.12, Phi* = 0.006 +/- 0.003, and log M* = 9.7 +/- 0.10 MH - Australia MH - France MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000088231100013 L2 - galaxies : distances and redshifts;galaxies : fundamental parameters galaxies : luminosity function, mass function;radio emission lines;surveys;MILKY-WAY; REDSHIFT SURVEY; PECULIAR VELOCITY; I OBSERVATIONS; LOCAL GROUP; LINE SO - Astronomical Journal 2000 ;119(6):2686-2698 917 UI - 16141 AU - Henry CD AU - randa-Gomez JJ AD - Univ Nevada, Nevada Bur Mines & Geol, Reno, NV 89557, USAUniv Nacl Autonoma Mexico, Inst Geol, UNICIT, Santiago De Queretaro 76001, Qro, MexicoHenry, CD, Univ Nevada, Nevada Bur Mines & Geol, Reno, NV 89557, USA TI - Plate interactions control middle-late Miocene, proto-Gulf and Basin and Range extension in the southern Basin and Range AB - Middle-late Miocene (proto-Gulf; similar to 12-6 Ma) extension around the Gulf of California (Gulf Extensional Province) is commonly interpreted as resulting from partitioning of oblique Pacific-North American plate motion into strike-slip displacement along the margin and east-northeast extension perpendicular to the margin within the North American plate. We propose that this mechanism also applies to kinematically similar, predominantly east-northeast extension that occurred at the same time throughout the southern Basin and Range province, from southern Arizona and New Mexico to the Trans-Mexican Volcanic Belt. New field and Ar-40/Ar-39 data in Sinaloa and Durango confirm that this episode of extension occurred on the mainland side of the Gulf and in the Basin and Range east of the Sierra Madre Occidental, which is generally considered the eastern margin of the Gulf Extensional Province. Published data indicate the middle-late Miocene episode also occurred across the northern and southern ends of the Sierra Madre where the Gulf Extensional Province connects with the Basin and Range: (1) from central Sonora into southern Arizona and New Mexico, and (2) from Nayarit into central Mexico north of the Trans-Mexican Volcanic Belt. This episode appears to have affected an area that continues to the eastern edge of the Basin and Range province in Texas and San Luis Potosi. Recognition that this episode of extension affected the entire southern Basin and Range resolves the discrepancy between the amount of extension calculated based on plate reconstructions and that based on field data within the Gulf Extensional Province alone. Published plate reconstructions require 160 to 110 km of east-northeast extension between similar to 12 and 6 Ma. If taken up solely within the Gulf Extensional Province, this would have generated 66 to 78% extension, which is much greater than observed. Spread across the entire southern Basin and Range it requires only similar to 20% total extension, which is more consistent with observations of cumulative extension between 12 and 6 Ma. Extension was partitioned into the Gulf Extensional Province because (1) it lies between two stable batholith belts (Mesozoic Peninsular Ranges on the west and mid-Tertiary Sierra Madre Occidental on the east) that resisted extension and (2) the Gulf was thermally weakened by immediately preceding are magmatism. Extension in the main Basin and Range province in part probably avoided the relatively strong, batholithic crust of the Sierra Madre Occidental. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 31 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700002 L2 - basin and range;Cenozoic;Gulf of California;magmatism;Mexico;tectonics;WESTERN UNITED-STATES; NORTHEASTERN BAJA-CALIFORNIA; LATE CENOZOIC EXTENSION; TRANS-PECOS TEXAS; SOUTHWESTERN ARIZONA; TERTIARY EXTENSION; VOLCANIC PROVINCE; NORTH-AMERICA; DURANGO-CITY; LORETO BASIN SO - Tectonophysics 2000 ;318(1-4):1-26 918 UI - 16091 AU - Herald JE AU - Schulte-Ladbeck RE AU - Eenens PRJ AU - Morris P AD - Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, Gto, MexicoSpace Res Org Netherlands, NL-3584 CA Utrecht, NetherlandsHerald, JE, Univ Pittsburgh, Dept Phys & Astron, 3941 OHara St, Pittsburgh, PA 15260 USA TI - The structure of Wolf-Rayet winds. II. Observations of ionization stratification in the WN subtype AB - Motivated by the question of the importance of ionization stratification in solving the "momentum problem" of Wolf-Rayet stellar winds, we have chosen a sample of 14 WN stars for a systematic study. We performed measurements of the emission line widths on ultraviolet, optical, and infrared spectra to obtain data spanning a large range of ionization potentials. We provide extensive tables of these measurements as well as line profile classifications. The presence of ionization stratification in the wind should result in a correlation between ionization potential and line width. We rind most of the winds to be stratified and discuss the level of stratification found in each star. To test the importance of ionization stratification to efficient radiation-to-wind momentum transfer, we compare our empirically measured stratification strengths with two sets of theoretical performance numbers and give the correlation statistics in each case MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000086732500008 L2 - line : formation;line : identification;stars : atmospheres;stars : Wolf-Rayet;MULTILINE TRANSFER; INFRARED-SPECTRA; STELLAR WINDS; STARS; HD-50896; LINES; ENVELOPES; DYNAMICS; NITROGEN; MODELS SO - Astrophysical Journal Supplement Series 2000 ;126(2):469-491 919 UI - 15496 AU - Heredero RH AU - Levi D AU - Rodriguez MA AU - Winternitz P AD - Ctr Int Ciencias AC, Cuernavaca, Morelos, MexicoUniv Complutense, Dept Fis Teor 2, E-28040 Madrid, SpainUniv Roma Tre, Dipartimento Fis, I-00146 Rome, ItalyIst Nazl Fis Nucl, Sezione Roma Tre, I-00146 Rome, ItalyUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaUniv Calif Santa Cruz, Dept Math Appl Sci 379, Santa Cruz, CA 95064, USAHeredero, RH, Ctr Int Ciencias AC, Av Univ 2001, Cuernavaca, Morelos, Mexico TI - Lie algebra contractions and symmetries of the Toda hierarchy AB - The Lie algebra L(Delta) of generalized and point symmetries of the equations in the Toda hierarchy is shown to be a semidirect sum of two infinite-dimensional Lie algebras, one perfect, the other Abelian. In the continuous limit the structure of the Lie algebra changes: a contraction occurs with the lattice spacing as the contraction parameter. In particular, for the Toda equation itself, a set of five elements, involving both point symmetries and generalized ones, contracts to the point symmetry algebra of the potential KdV equation MH - Canada MH - Italy MH - Mexico|Morelos MH - Spain MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000088710000008 L2 - DIFFERENTIAL-DIFFERENCE-EQUATIONS; EVOLUTION-EQUATIONS; GRADED CONTRACTIONS; LATTICE; DISCRETE; MODEL SO - Journal of Physics A-Mathematical and General 2000 ;33(28):5025-5040 920 UI - 16449 AU - Hermann AM AU - Mansour M AU - Badri V AU - Pinkhasov B AU - Gonzales C AU - Fickett F AU - Calixto ME AU - Sebastian PJ AU - Marshall CH AU - Gillespie TJ AD - Univ Colorado, Dept Phys, Boulder, CO 80309, USANIST, Mat Sci & Engn Lab, Boulder, CO 80303, USAUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoLockheed Martin Astronaut, Denver, CO 80201, USAHermann, AM, Univ Colorado, Dept Phys, Boulder, CO 80309, USA TI - Deposition of smooth Cu(In,Ga)Se-2 films from binary multilayers AB - Thin film photovoltaic devices based on CuInSe2 (CIS) prepared by vacuum deposition have shown efficiencies greater than 17%. However, inexpensive large-area uniform-thickness photovoltaic devices are likely to require non-vacuum deposition techniques. We discuss in this paper electrodeposition of CIS films using multilayers of binary selenides and, post-deposition selenization and thermal annealing. A sequential electrodeposition of Cu/In2Se3/Cu2-xSe on Mo-on-glass substrates was done potentiostatically at varying potentials, pH and deposition rime. We have obtained crystalline chalcopyrite CuInSe2 films with phase content greater than 95%. The surface of the films is specularly reflecting. We also present here a study of sputtered CIGS films using multilayers of binary selenides, and one-step electrodeposition of CIS films. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Morelos MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000085457900015 L2 - electrodeposition;copper-indium-selenide;multilayers;thin films;sputtering;stoichiometry;SOLAR-CELLS; THIN-FILMS SO - Thin Solid Films 2000 ;361():74-78 921 UI - 14980 AU - Hernandez-Avila M AU - Villalpando CG AU - Palazuelos E AU - Hu H AU - Villalpando MEG AU - Martinez DR AD - Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62508, Morelos, MexicoEmory Univ, Rollins Sch Publ Hlth, Dept Environm & Occupat Hlth, Atlanta, GA 30322, USACtr Estudios Diabet, Mexico City, DF, MexicoAmer British Cowdray Hosp, Mexico City, DF, MexicoHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHernandez-Avila, M, Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Av Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Determinants of blood lead levels across the menopausal transition AB - In this study, the authors sought to evaluate the impact of menopause on lead remobilization from bone-lead stores. The study was conducted between 1993 and 1995 in Mexico City and included 903 women (mean age = 46.8 y [standard deviation = 8.2 y]). Participants provided information about reproductive variables and known risk factors for high PbB levels. PbB levels were determined with graphite furnace atomic absorption spectrophotometry. The authors used linear-regression models to describe the relationship between PbB levels and variables of interest. PbB levels ranged from 1.0 mug/dl to 43.8 mug/dl (mean = 11.0 mug/dl). Menopausal women at baseline had the highest PbB levels; the mean difference between pre- and postmenopausal women was 0.76 mug/dl (95% confidence interval = 0.024, 1.48). We observed an inverted U-shaped relationship between PbB level and age. The highest PbB levels were observed in women aged 47-50 y. Other important predictors of PbB levels were use of lead-glazed ceramics, number of pregnancies, history of cigarette smoking, and height. Our results support the hypothesis that bone lead may be mobilized during menopause and may constitute an important source of exposure MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 11 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000090139200011 L2 - MEXICO-CITY; BONE-LEAD; POSTPARTUM WOMEN; PREGNANCY; MASS; MOBILIZATION; LACTATION; SKELETON; WEIGHT; MEN SO - Archives of Environmental Health 2000 ;55(5):355-360 922 UI - 15845 AU - Hernandez-Carmona G AU - Garcia O AU - Robledo D AU - Foster M AD - Ctr Interdisciplinario Ciencias Marinas, La Paz, BCS, MexicoCtr Invest Biol Noroeste, La Paz, BCS, MexicoCINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoMoss Landing Marine Labs, Moss Landing, CA 95039, USAHernandez-Carmona, G, Ctr Interdisciplinario Ciencias Marinas, Ap Postal 592, La Paz, BCS, Mexico TI - Restoration techniques for Macrocystis pyrifera (Phaeophyceae) populations at the southern limit of their distribution in Mexico AB - Following the 1982-83 Fl Nino, Macrocystis pyrifera (L.) C. Agardh, forests disappeared throughout their range in Baja California. The giant kelp forests subsequently recovered within this range except at their extreme southern limit, a region encompassing 50 km of coastline with a former giant kelp standing stock of 28,000 wet tons. Two techniques were tested to restore these forests: juvenile transplantation and seeding with sporophylls. For transplanting, juvenile M. pyrifera sporophytes were attached to Eisenia arborea stumps seasonally over a two-year period. Average survival of transplants ranged from 7% in spring to 41% in winter. After two years, the average number of basal fronds per plant increased from 2 to 64 per plant and surface fronds from 0 to 34 per plant. Average frond growth rate of the transplants ranged from 8.1 cm day(-1) in summer to 10.8 cm day(-1) in winter. No significant differences in growth rate were found among treatments (seasons) for the transplants, but control plants showed a seasonal variation, with higher frond growth rates in winter (13.3 cm day(-1)) and spring (9.3 cm day(-1)) and lower in summer (4.4 cm day(-1)). The seeding technique was tested in a fully orthogonal-block design with three factors with two levels (factors: + sporophylls addition, +/- Eisenia arborea and +/- understory algae). Macrocystis pyrifera recruitment occurred only in treatments with added sporophylls. The highest recruitment occurred where all algae were removed from the bottom, followed by the treatments without understory algae but with Eisenia arborea. This results suggest that a lack of spores and the presence of understory algae were the main factors inhibiting Macrocystis pyrifera recruitment in the area. Lower sea water temperatures and high nutrient concentrations occurred in spring and high temperatures and low nutrients in summer suggesting, as in southern California, an inverse relationship between these two factors. The results suggest a combined approach of transplanting juveniles and seeding during spring would be most effective for restoring the M. pyrifera forests MH - Mexico|Baja California Sur MH - Mexico|Yucatan MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000087620200008 L2 - GIANT-KELP; CALIFORNIA; COMMUNITY; FOREST; GROWTH; RECRUITMENT; STABILITY SO - Botanica Marina 2000 ;43(3):273-284 923 UI - 16671 AU - Hernandez-Contreras M AU - Pincus P AD - Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAInst Politecn Nacl, Ctr Invest & Estud Avanzados, Mexico City 07000, DF, MexicoHernandez-Contreras, M, Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA TI - Structure and interaction between ionic layers AB - The effect of asymmetric charge distribution on the structural properties of a lamellar system of ionic layers was determined with the use of the hypernetted chain theory. Due to electrostatic interaction and positional correlations between ions in all different layers, there appear layer pairs attractive forces which enhance when the ionic charge and concentration per layer is increased or when the distance of separation in reduced. The innermost layer pairs show the strongest attractive interaction due to an increased enhancement of ionic correlations. Asymmetry in the ionic concentration in the normal direction to the planes and moderate layers separation, h, produce a nonmonotonous pressure curve as a function of h for the more exterior layer pairs whereas at longer separations this pressure shows the universal asymptotic power law of correlated charge fluctuations of a simple two layer system, P similar to -1/h(3). (C) 2000 American Institute of Physics. [S0021-9606(99)71048-2] MH - USA MH - Mexico|Distrito Federal PB - WOODBURY: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000084507000052 L2 - MONTE-CARLO; ELECTROLYTE-SOLUTIONS; FORCES; ATTRACTION; SURFACES; MODEL; PLANE SO - Journal of Chemical Physics 2000 ;112(2):954-959 924 UI - 15768 AU - Hernandez-Da Mota S AU - Sanchez-Buenfil E AU - Guerrero-Naranjo JL AU - Ochoa-Contreras D AU - D'Amico D AU - Marcellino G AU - Quiroz-Mercado H AD - UNAM, Mexico City, DF, MexicoAsociac Para Evitar Ceguera Mexico, Mexico City, DF, MexicoHarvard Univ, Massachusetts Eye & Ear Infirm, Boston, MA 02114, USACoherent Med Grp, Santa Clara, CA, USA TI - Vitrectomy and erbium Yag laser induced retinochoroidal anastomosis for treatment of ischemic central retinal vein occlusion MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246703494 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S645-S645 925 UI - 16627 AU - Hernandez-Diaz J AU - Contreras R AU - Wrackmeyer B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyContreras, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - NMR study of spirophosphoranes derived from 2-aminophenols AB - Multinuclear magnetic resonance experiments were performed (H-1, C-13, P-31 and N-15) for P-H phosphoranes derived from 2-aminophenol, 4-tert-butyl-2-aminophenol, and 4,6-di-tert-butyl-2-aminophenol. Selective heteronuclear H-1{N-15} double resonance experiments and two-dimensional N-15/H-1 HETCOR experiments enabled us to determine various signs of coupling constants (e.g., (2)J(P-31, N-1, H-1) > 0; (1)J(P-31, N-15) < 0). The H-1-coupled N-15 NMR spectrum recorded by the INEPT pulse sequence shows the splitting due to (1)J(P-31, N-15) and (2)J(N-15, P, H-1). The latter value is useful for polarization transfer experiments from H-1 to N-15, once the hydrogen atoms of the N-H functions ave replaced by other groups. Isotope-induced chemical shifts 1 Delta(14/15)N(P-31) were measured by using the INEPT-HEED pulse sequence. (C) 2000 John Wiley & Sons, Inc MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1042-7163 UR - ISI:000084808300003 L2 - NATURAL-ABUNDANCE; PULSE SEQUENCES; PHOSPHORUS SO - Heteroatom Chemistry 2000 ;11(1):11-15 926 UI - 15101 AU - Hernandez-Eugenio G AU - Fardeau ML AU - Patel BKC AU - Macarie H AU - Garcia JL AU - Ollivier B AD - Univ Aix Marseille 1, IFR BAIM, Microbiol Lab, IRD, Marseille, FranceUniv Mediterranee, ESIL, Marseille, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoGriffith Univ, Sch Biomol & Biomed Sci, Brisbane, Qld 4111, AustraliaIRD, Mexico City, DF, MexicoOllivier, B, Univ Aix Marseille 1, IFR BAIM, Microbiol Lab, IRD, Marseille, France TI - Desulfovibrio mexicanus sp nov., a sulfate-reducing bacterium isolated from an upflow anaerobic sludge blanket (UASB) reactor treating cheese wastewaters AB - A mesophilic sulfate-reducing bacterium, designated strain Lup1(T) (T=type strain) was isolated from a Mexican UASB digester treating cheese factory wastewater. The non-motile, Gram-negative, curved and non-spore-forming cells (1.7-2.5 x 0.5 mu m) existed singly or in chains. Optimum growth occurred at 37 degrees C and pH 7.2 in a medium containing lactate and thiosulfate. Strain Lup1(T) used pyruvate, formate, Casamino acids, serine, cysteine, H-2 and ethanol as electron donors in the presence of thiosulfate as an electron acceptor and fermented pyruvate, Casamino acids, cysteine, and serine. Sulfate, elemental sulfur, and sulfite also served as electron accepters but not nitrate or fumarate. Thiosulfate was disproportionated to sulfate and sulfide. The G+C content of the DNA was 66 mol%. Phylogenetic analysis based on 16S rDNA revealed that strain Strain Lup1(T) was a member of the genus Desulfovibrio with Desulfovibrio aminophilus being the closest relative (similarity value of 91%). As strain Lup1(T) is physiologically and phylogenetically different from other Desulfovibrio species, it is designated Desulfovibrio mexicanus sp. nov (=DSM 13116). (C) 2000 Academic Press MH - Australia MH - France MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 1075-9964 UR - ISI:000089834200006 L2 - sulfate-reducing bacteria;cheese factory wastewater;UASB digester;thiosulfate disproportionation;Desulfovibrio mexicanus;phylogeny;AMINO-ACID DEGRADATION; INORGANIC SULFUR-COMPOUNDS; GEN-NOV; THIOSULFATE; OXIDATION; OIL; DISPROPORTIONATION; THERMOANAEROBACTER; STRAINS; GROWTH SO - Anaerobe 2000 ;6(5):305-312 927 UI - 15416 AU - Hernandez-Garduza O AU - Garcia-Sanchez F AU - Neau E AU - Rogalski M AD - Inst Mexicano Petr, Grp Simulac Mol, Mexico City 07730, DF, MexicoFac Sci Luminy, Chim Phys Lab, F-13288 Marseille, FranceEcole Natl Super Ind Chim, Inst Natl Polytech Lorraine, Lab Thermodynam Chim & Appl, F-54001 Nancy, FranceHernandez-Garduza, O, Inst Mexicano Petr, Grp Simulac Mol, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Equation of state associated with activity coefficient models to predict low and high pressure vapor-liquid equilibria AB - A simple and thermodynamically consistent method is presented to establish an equation of state for mixtures by using activity coefficient model parameters. All current solution models such as NRTL, van Laar, UNIFAC, or any other thermodynamic model can be used. The main feature of the method presented is that only a single scaling factor value determined at a given reference temperature is required to predict the vapor-liquid equilibria in a wide range of temperature and pressure. The performance of the method is tested on the prediction of the vapor-liquid equilibria at low, moderate, and high pressures for six binary systems (methanol-benzene, acetone- water, methanol-acetone, methanol-water, ethanol-water, and 2-propanol-water) and a ternary system (acetone-water-methanol). For comparison, vapor-liquid equilibrium calculations were carried out with the Wong and Sandler method by using the PRSV equation of state associated with the van Laar and scaling factors. On the whole, it is found that at high pressures both methods give similar predictions but at low pressures the proposed method gives sometimes better results than that of Wong and Sandler method. (C) 2000 Elsevier Science S.A. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 1385-8947 UR - ISI:000088921100001 L2 - equation of state;activity coefficient model;vapor-liquid equilibria;scaling factor;PENG-ROBINSON EQUATION; UNIFAC-BASED EQUATION; GIBBS ENERGY MODELS; VIDAL MIXING RULE; THERMODYNAMIC PROPERTIES; TERNARY-SYSTEMS; CUBIC EQUATIONS; GAS SOLUBILITY; ETHANOL-WATER; MIXTURES SO - Chemical Engineering Journal 2000 ;79(2):87-101 928 UI - 14634 AU - Hernandez-Lopez S AU - Tkatch T AU - Perez-Garci E AU - Galarraga E AU - Bargas J AU - Hamm H AU - Surmeier J AD - Northwestern Univ, Sch Med, Inst Neurosci, Dept Physiol, Chicago, IL 60611, USAUNAM, Inst Fisiol Celular, Mexico City 4510, DF, MexicoSurmeier, J, Northwestern Univ, Sch Med, Inst Neurosci, Dept Physiol, 320 E Super St, Chicago, IL 60611 USA TI - D-2 dopamine receptors in striatal medium spiny neurons reduce L-type Ca2+ currents and excitability via a novel PLC beta 1-IP3-calcineurin-signaling cascade AB - In spite of the recognition that striatal D-2 receptors are critical determinants in a variety of psychomotor disorders, the cellular mechanisms by which these receptors shape neuronal activity have remained a mystery. The studies presented here reveal that D-2 receptor stimulation in enkephalin-expressing medium spiny neurons suppresses transmembrane Ca2+ currents through L-type Ca2+ channels, resulting in diminished excitability. This modulation is mediated by G(beta gamma) activation of phospholipase C, mobilization of intracellular Ca2+ stores, and activation of the calcium-dependent phosphatase calcineurin. In addition to providing a unifying mechanism to explain the apparently divergent effects of D-2 receptors in striatal medium spiny neurons, this novel signaling linkage provides a foundation for understanding how this pivotal receptor shapes striatal excitability and gene expression MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 138 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000165976500007 L2 - neostriatum;patch clamp;dopamine;neuromodulation;medium spiny neuron;basal ganglia;electrophysiology;single-cell RT-PCR;ion channel;calcium;RAT NEOSTRIATAL NEURONS; CALCIUM CHANNELS; BASAL GANGLIA; MEDIATED INHIBITION; GENE-EXPRESSION; PHOSPHOLIPASE-C; PROTEIN-KINASE; PHOSPHOINOSITIDE HYDROLYSIS; STRIATONIGRAL NEURONS; HIPPOCAMPAL-NEURONS SO - Journal of Neuroscience 2000 ;20(24):8987-8995 929 UI - 14680 AU - Hernandez-Pando R AU - Jeyanathan M AU - Mengistu G AU - Aguilar D AU - Orozco H AU - Harboe M AU - Rook GAW AU - Bjune G AD - Royal Free & Univ Coll Med Sch, Windeyer Inst Med Sci, Dept Bacteriol, London W1T 4JF, EnglandInst Nacl Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Sect, Mexico City 14000, DF, MexicoArmauer Hansen Res Inst, Addis Ababa, EthiopiaUniv Oslo, Natl Hosp, Inst Immunol, Oslo, NorwayUniv Oslo, Inst Gen Practice & Community Med, Oslo, NorwayRook, GAW, Royal Free & Univ Coll Med Sch, Windeyer Inst Med Sci, Dept Bacteriol, London W1T 4JF, England TI - Persistence of DNA from Mycobacterium tuberculosis in superficially normal lung tissue during latent infection AB - Background A third of the world's population has latent infection with Mycobacterium tuberculosis, and in areas of low endemicity, most cases of active tuberculosis arise as a result of reactivation of latent bacilli. We sought to establish the cellular location of these latent organisms to facilitate their elimination. Methods We applied in-situ PCR to sections of macroscopically normal lung tissue from 13 individuals from Ethiopia and 34 from Mexico who had died from causes other than tuberculosis. Sections of lung tissue from six Norwegian individuals (ie, individuals from a non-endemic population) acted as negative. controls, and six Ethiopian tuberculosis cases acted as positive controls. Findings Control necropsy samples from the Norwegian individuals were all negative by in-situ PCR and conventional PCR,whereas all samples from known Ethiopian tuberculosis cases were positive by both methods. However, in macroscopically normal lung tissue from Ethiopian and Mexican individuals without tuberculous lesions, the in-situ PCR revealed five of 13 and ten of 34 positive individuals respectively. These results were confirmed by conventional PCR with extracted DNA. Positive cells included alveolar and interstitial macrophages, type II pneumocytes, endothelial cells, and fibroblasts. Interpretation M tuberculosis can persist intracellularly in lung tissue without histological evidence of tuberculous lesions. M tuberculosis DNA is situated not only in macrophages but also inother non-professional phagocytic cells. These findings contradict the dominant view that latent organisms exist in old classic tuberculous lesions, and have important implications for strategies aimed at the elimination of latent and persistent bacilli MH - United Kingdom MH - Ethiopia MH - Mexico|Distrito Federal MH - Norway PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 111 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000165997300011 L2 - TUMOR-NECROSIS-FACTOR; EXOGENOUS REINFECTION; EPITHELIAL-CELLS; AVIUM COMPLEX; SITUATION; INVASION; MODELS SO - Lancet 2000 ;356(9248):2133-2138 930 UI - 15557 AU - Hernandez-Pando R AU - Orozco H AU - Arriaga K AU - Pavon L AU - Rook G AD - Royal Free & Univ Coll London, Sch Med, Dept Bacteriol, London W1P 6DB, EnglandInst Nacl Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Lab, Mexico City 14000, DF, MexicoRook, G, Royal Free & Univ Coll London, Sch Med, Dept Bacteriol, 46 Cleveland St, London W1P 6DB, England TI - Treatment with BB-94, a broad spectrum inhibitor of zinc-dependent metalloproteinases, causes deviation of the cytokine profile towards Type-2 in experimental pulmonary tuberculosis in Balb/c mice AB - BB-94 (batimastat) is a broad- spectrum hydroxamic acid-based zinc metalloproteinase inhibitor that inhibits both the matrix metalloproteinases (MMP) and members of the ADAM family of enzymes such as Tumour Necrosis Factor-alpha Cleaving Enzyme (TACE). These enzymes are involved in the regulation of inflammatory processes in tuberculosis. Balb/c mice infected with M. tuberculosis via the intratracheal route were treated with BB-94 for 1 month, starting on the day of infection. Immunohistochemistry, semiquantitative RT-PCR and ELISA assays for cytokines revealed a deficit in IL-1 and IL-2 expression and a premature bias towards IL-4 expression, accompanied by a delay in granuloma formation and more rapid progression of disease in BB-94-treated animals. This situation corrected itself after the drug was withdrawn at 28 days. In contrast, when BB-94 was administered only after 1 month there were no significant changes apart from the presence of amyloid, and a paradoxically increased expression of IL-1 alpha. These results cast light on mechanisms of immunity in tuberculosis and also indicate that in patients treated with similar broad-spectrum MMP inhibitors there may be a risk of inappropriate deviation of some immune responses towards a Type-2 cytokine profile MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Pathology U5 - J;Article AV - English IS - 0959-9673 UR - ISI:000088482800005 L2 - matrix metalloproteinases;tuberculosis;cytokine profile;TUMOR-NECROSIS-FACTOR; FACTOR-ALPHA; MATRIX-METALLOPROTEINASE; MYCOBACTERIUM-TUBERCULOSIS; PANCREATIC-CANCER; BATIMASTAT BB-94; TNF-ALPHA; EXPRESSION; CELL; PATHOGENESIS SO - International Journal of Experimental Pathology 2000 ;81(3):199-209 931 UI - 15633 AU - Hernandez-Pando R AU - Pavon L AU - Orozco EH AU - Rangel J AU - Rook GAW AD - Inst Nacl Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Lab, Mexico City 14000, DF, MexicoRoyal Free & Univ Coll Med Sch, Dept Bacteriol, London, EnglandRook, GAW, Univ Coll London, Sch Med, Windeyer Inst Med Sci, Dept Bacteriol, 46 Cleveland St, London W1P 6DB, England TI - Interactions between hormone-mediated and vaccine-mediated immunotherapy for pulmonary tuberculosis in BALB/c mice AB - Problems of logistics, compliance and drug resistance point to an urgent need for immunotherapeutic strategies capable of shortening the current 6-month chemotherapy regimens used to treat tuberculosis, or of supplementing ineffective therapy. In this study we sought to define the mechanism of action of two immunotherapies, both of which have previously been shown to prolong survival. Secondly, we wished to identify any clinically useful synergy between these therapies. In BALB/c mice infected via the trachea with Mycobacterium tuberculosis H37Rv there is an initial phase of partial resistance dominated by type 1 cytokines plus tumour necrosis factor-alpha (TNF-alpha) and interleukin-1 (IL-1), followed by a phase of progressive disease. This progressive phase is accompanied by increasing expression of IL-4, and diminished expression of IL-1 and TNF-alpha. Animals in this late progressive phase of the disease (day 60) were treated with two injections (day 60 and day 90) of 0.1 or 1.0 mg of heat-killed Mycobacterium vaccae, or with 3 beta,17 beta-androstenediol (AED; 25 mu g subcutaneously three times/week), or with both therapies. We show here using four techniques in parallel (morphometry, immunohistochemistry with automated cell counting, semiquantitative reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assays of cytokines in lung extracts) that treatment with M. vaccae causes a switch back towards a type 1 cytokine profile, restoration of expression of IL-1 alpha and TNF-alpha, and a switch from pneumonia to granuloma. This is very similar to the changes previously seen after treatment with AED. However, there was no evidence for synergy between M. vaccae and AED MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Immunology U5 - J;Article AV - English IS - 0019-2805 UR - ISI:000088304100016 L2 - KILLED MYCOBACTERIUM-VACCAE; INTERFERON-GAMMA; IMMUNE-RESPONSE; IN-VITRO; CELLS; PATHOGENESIS; MACROPHAGES; INFECTION; SAMPLES; IL-12 SO - Immunology 2000 ;100(3):391-398 932 UI - 14928 AU - Hernandez-Pastora JL AU - Manko VS AU - Martin J AU - Ruiz E AD - Univ Salamanca, Area Fis Teor, E-37008 Salamanca, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoHernandez-Pastora, JL, Univ Salamanca, Area Fis Teor, E-37008 Salamanca, Spain TI - A note on the factor structure of some non-rational vacuum metrics AB - In this note we point out that a large class of stationary, axisymmetric, vacuum solutions of the Einstein equations which are not representable as rational functions of some coordinates has a factor structure similar to that of Tomimatsu-Sato metrics MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000165167500003 L2 - Ernst potential;Weyl solutions;non-linear superposition techniques;EINSTEIN-MAXWELL-EQUATIONS; KINNERSLEY-CHITRE TRANSFORMATIONS; HOMOGENEOUS HILBERT PROBLEM; TOMIMATSU-SATO METRICS; GRAVITATIONAL-FIELDS; ASYMPTOTICALLY FLAT; MULTIPOLE MOMENTS; DELTA=2 SOLUTION; DEFORMED MASS; STATIONARY SO - General Relativity and Gravitation 2000 ;32(11):2131-2139 933 UI - 16221 AU - Hernandez-Suarez CM AU - Castillo-Chavez C AD - Univ Colima, CGIC, Colima 28045, MexicoCornell Univ, Biometr Unit, Ithaca, NY 14850, USAHernandez-Suarez, CM, Univ Colima, CGIC, Apdo Postal 25, Colima 28045, Mexico TI - Urn models and vaccine efficacy estimation AB - We derive the distribution of the number of infections among unvaccinated and vaccinated individuals for model 1 (leaky) and model 2 (all/nothing) vaccines, assuming random mixing of a homogeneous population. For all/nothing vaccines, we show that the distribution of the number of infected vaccinated individuals conditioning on n observed infections follows a hypergeometric distribution, and the vaccine efficacy estimate (VE) can be derived from the usual estimate of the total population size in a capture-recapture sampling program. For leaky vaccines, we show that the number of vaccinated infected follows a distribution that was first derived by Wallenius. We found that the current point estimates of VE for each model perform very well, but the urn model construction presented here provides a strong framework for estimation and hypothesis testing on the parameters, and can be applied when the available data are a sample of the population. Since the method does not require an underlying transmission model, it can be applied to estimate the VE for non-contagious diseases. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Mexico|Colima MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Mathematical & Computational Biology;Public, Environmental & Occupational Health;Medical Informatics;Medicine, Research & Experimental;Statistics & Probability U5 - J;Article AV - English IS - 0277-6715 UR - ISI:000086328900008 L2 - DISEASES SO - Statistics in Medicine 2000 ;19(6):827-835 934 UI - 14341 AU - Hernandez-Torres J AU - guilera-Granja F AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainAguilera-Granja, F, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Magnetic moments in Ni clusters with deformations AB - We have studied the influence of geometrical deformations on the magnetic moments of Ni-N clusters. Initial geometries of the clusters are taken from molecular dynamics and Monte Carlo calculations based on semi-empirical potentials. We only consider deformations, keeping the surface area of the clusters constant. The spin-polarized electronic structure has been calculated within a self-consistent spd tight-binding method in a mean-field approximation. The results indicate that changes in the d component of the magnetic moment as a consequence of the deformation can be explained in terms of the coordination number and inter-atomic distance whereas changes in the sp component cannot be explained in terms of these geometrical parameters. The complex dependence of the total magnetic moment is determined mainly by the sp component. Our results have been compared with available experimental data. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|San Luis Potosi MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000166784200006 L2 - magnetically ordered materials;nanostructures;ELECTRONIC-STRUCTURE; IRON CLUSTERS; BEHAVIOR SO - Solid State Communications 2000 ;117(8):477-482 935 UI - 16435 AU - Hernandez-Trujillo J AU - Bader RFW AD - McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoBader, RFW, McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada TI - Properties of atoms in molecules: Atoms forming molecules AB - This paper studies the evolution of the electron densities of two separated atoms into an equilibrium molecular distribution. A range of interactions is considered: from closed-shell with and without charge transfer, through polar-shared, to equally shared interactions. The changes in the density are monitored in terms of the properties of the density at the bond critical point and the shape of the interatomic surface. The effect of these changes on the properties of the atoms defined as proper open systems is determined. The "harpoon mechanism" operative in the formation of LiF is found to exert dramatic effects on the electron density and on the atomic and molecular properties. The virial and the Ehrenfest force theorems in their molecular, atomic, and local forms, together with the Hellmann-Feynman theorem, provide an understanding of the similarities and differences in the bonding resulting from closed-shell, shared, and polar interactions. The effect of the long-range dispersion forces on the electron density and the resulting changes in the kinetic and potential energies, the former decreasing and the latter increasing on the initial approach of the atoms, are investigated. In addition to the changes in the total energy and its kinetic and potential energy components as a function of the internuclear separation R, the atomic contributions to these quantities are also reported. The atomic Ehrenfest force is the force acting on the electron density in an atomic basin and the one measured in an atomic force microscope. It is shown to change from an intially attractive interaction, to a repulsive one at a separation slightly greater than R, where the Hellmann-Feynman forces on the nuclei vanish MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000085642100021 L2 - CONFIGURATION-INTERACTION; BASIS-SETS; CORRELATED CALCULATIONS; DISSOCIATION-ENERGY; ELECTRON-DENSITY; MOLLER-PLESSET; CHEMICAL-BONDS; OPEN SYSTEM; CURVE; DEFINITION SO - Journal of Physical Chemistry A 2000 ;104(8):1779-1794 936 UI - 15530 AU - Hernandez L AU - Sotolongo M AU - Rosabal Y AU - Menendez C AU - Ramirez R AU - Caballero-Mellado J AU - Arrieta J AD - Ctr Ingn Genet & Biotecnol, Div Plantas, Lab Interacciones Planta Microorganismos, Habana 10600, CubaUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoHernandez, L, Ctr Ingn Genet & Biotecnol, Div Plantas, Lab Interacciones Planta Microorganismos, Apartado 6162, Habana 10600, Cuba TI - Structural levansucrase gene (lsdA) constitutes a functional locus conserved in the species Gluconacetobacter diazotrophicus AB - Levansucrase(EC 2.4.1.10) was identified as a constitutive exoenzyme in 14 Gluconacetobacter diazotrophicus strains recovered from different host plants in diverse geographical regions. The enzyme, consisting of a single 60-kDa polypeptide, hydrolysed sucrose to synthesise oligofructans and levan. Sugar-cane-associated strains of the most abundant genotype (electrophoretic type 1) showed maximal values of levansucrase production. These values were three-fold higher than those of the isolates recovered from coffee plants. Restriction fragment Length polymorphism analysis revealed a high degree of conservation of the levansucrase locus (lsdA) among the 14 strains under study, which represented 11 different G. diazotrophicus genotypes. Targeted disruption of the lsdA gene in four representative strains abolished their ability to grow on sucrose, indicating that the endophytic species G. diazotrophicus utilises plant sucrose via levansucrase MH - Cuba MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000088590300016 L2 - Gluconacetobacter diazotrophicus;Acetobacter diazotrophicus;endophytic bacteria;levansucrase;LsdA;sucrose metabolism;sugar cane;BACTERIUM ACETOBACTER-DIAZOTROPHICUS; SUGAR-CANE; SRT4; IDENTIFICATION SO - Archives of Microbiology 2000 ;174(1-2):120-124 937 UI - 14678 AU - Hernandez M AU - Meikle WPS AU - Aparicio A AU - Benn CR AU - Burleigh MR AU - Chrysostomou AC AU - Fernandes AJL AU - Geballe TR AU - Hammersley PL AU - Iglesias-Paramo J AU - James DJ AU - James PA AU - Kemp SN AU - Lister TA AU - Martinez-Delgado D AU - Oscoz A AU - Pollacco DL AU - Rozas M AU - Smartt SJ AU - Sorensen P AU - Swaters RA AU - Telting JH AU - Vacca WD AU - Walton NA AU - Zapatero-Osorio MR AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, EnglandInst Astrofis Canarias, Tenerife 38200, SpainUniv La Laguna, Dept Astrofis, Tenerife, SpainIsaac Newton Grp, Santa Cruz de La Palma 38700, Islas Canarias, SpainUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandJoint Astron Ctr, Hilo, HI 96720, USAUniv Porto, Ctr Astrophys, P-4150762 Oporto, PortugalGemini Observ, Hilo, HI 96720, USAUniv St Andrews, Dept Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead L41 1LD, Merseyside, EnglandInst Astron & Meteorol, Guadalajara, Jalisco, MexicoQueens Univ Belfast, Astrophys & Planetary Sci Div, Belfast BT7 1NN, Antrim, North IrelandUniv Groningen, Kapteyn Inst, NL-9700 AV Groningen, NetherlandsIRTF, Inst Astron, Honolulu, HI 96822, USAUniv Cambridge, IoA, Cambridge CB3 0HA, EnglandHernandez, M, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, Prince Consort Rd, London SW7 2BZ, England TI - An early-time infrared and optical study of the Type Ia Supernova 1998bu in M96 AB - We present first-season infrared (IR) and optical photometry and spectroscopy of the Type Ia Supernova 1998bu in M96. We also report optical polarimetry of this event. SN 1998bu is one of the closest type Ia supernovae of modern times, and the distance of its host galaxy is well determined. We find that SN 1998bu is both photometrically and spectroscopically normal. However, the extinction to this event is unusually high, with A(V) = 1.0 +/- 0.11. We find that SN 1998bu peaked at an intrinsic M-V = -19.37 +/- 0.23. Adopting a distance modulus of 30.25 (Tanvir et al.) and using Phillips et al.'s relations for the Hubble constant, we obtain H-0 = 70.4 +/- 4.3 km s(-1) Mpc(-1). Combination of our IR photometry with those of Jha et al. provides one of the most complete early-phase IR light curves for a SN Ia published so far. In particular, SN 1998bu is the first normal SN Ia for which good pre-t(Bmax) IR coverage has been obtained. It reveals that the J, H and K light curves peak about 5 days earlier than the flux in the B-band curve MH - United Kingdom MH - Mexico|Jalisco MH - Netherlands MH - Portugal MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 29 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000165905000018 L2 - supernovae : individual : SN 1998bu;HUBBLE CONSTANT; LIGHT CURVES; STANDARD STARS; DISTANCE; SPECTROSCOPY; SPECTRA; 1991T SO - Monthly Notices of the Royal Astronomical Society 2000 ;319(1):223-234 938 UI - 16467 AU - Hernandez M AU - Beltran C AU - Garcia E AU - Fragoso G AU - Gevorkian G AU - Fleury A AU - Parkhouse M AU - Harrison L AU - Sotelo J AU - Sciutto E AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirugia, Mexico City, DF, MexicoUniv Limoges, Fac Med, Inst Epidemiol Neurol & Neurol Trop, F-87025 Limoges, FranceInst Anim Hlth, Pirbright Labs, Pirbright GU24ONGF, EnglandUniv Edinburgh, Dept Trop Anim Hlth, Ctr Trop Vet Med, Roslin EH25 9RG, Midlothian, ScotlandSciutto, E, Univ Nacl Autonoma Mexico, Inst Invest Biomed, AP 70228, Mexico City 04510, DF, Mexico TI - Cysticercosis: towards the design of a diagnostic kit based on synthetic peptides AB - Cysticercosis caused by Taenia solium is a very common disease in developing countries that seriously affects human health. Diagnosis can only be confirmed with the aid of computerized tomography or nuclear magnetic resonance (NMR) creating obvious difficulties for epidemiological studies. Reliable immunoassays employing cerebrospinal fluid (CSF) have been developed. based on the use of cysticercal antigens. However, the reliance on parasite material is restrictive. Herein, we report the advances in the design of a diagnostic kit based on immunodominant synthetic peptides, targeting four candidate epitopes KETc1, KETcl2, 410 and 413 which were identified from three different clones (KETc1. 12 and 4) selected from a cDNA library of Taenia crassiceps. CSF antibodies against T. solium cysticercal antigens (TCA) as well as the four peptides were determined by enzyme-linked immunoabsorbent assays (ELISA) using two panels of CSF from patients with confirmed neurocysticercosis and other neurological diseases. In the first CSF panel which included patients with high level of antibodies against TCA, KETcl2 exhibited almost the: same sensitivity (87.5%) as TCA (93.7%) and 100% specificity. In the second panel of 110 CSF collected at random. two peptides (KETc1 and KETcl2) exhibited sensitivities of 40 and 36%. respectively, and were 100% specific. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Immunology U5 - J;Article AV - English IS - 0165-2478 UR - ISI:000085520000003 L2 - cysticercosis;synthetic peptides;immunodiagnosis;TAENIA-CRASSICEPS; ANTIGENS; MURINE SO - Immunology Letters 2000 ;71(1):13-17 939 UI - 15449 AU - Hernandez MP AU - Alonso CF AU - Martel A AU - Casielles E AU - Rejon V AU - Pena JL AD - Univ La Habana, Inst Mat & React, La Habana 10400, CubaUniv La Habana, Fac Fis, La Habana 10400, CubaIPN, Dept Fis Aplicada, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoHernandez, MP, Univ La Habana, Inst Mat & React, San Lazaro & L Vedado Plaza, La Habana 10400, Cuba TI - Barrier height behavior for In/CdTe polycrystalline junction AB - The chemical composition of CdTe surfaces has been studied for In over polycrystalline CdTe using I-V measurement. The obtained barrier height presents a spatial distribution on CdTe surface and an inhomogeneous barrier height is the cause of the ideal behavior deviation in the I-V curves. Multi-level Fermi pinning within the contact that is produced by aggregate of Te-rich and Cd-rich areas is a consistent explanation for the barrier height inhomogeneities MH - Cuba MH - Mexico|Yucatan PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800037 L2 - CONTACTS SO - Physica Status Solidi B-Basic Research 2000 ;220(1):209-213 940 UI - 15460 AU - Hernandez MP AU - Alonso CF AU - Pena JL AD - Univ La Habana, Inst Mat & Reactivos, La Habana 10400, CubaUniv La Habana, Fac Fis, La Habana 10400, CubaIPN, CICATA, Mexico City 11500, DF, MexicoHernandez, MP, Univ La Habana, Inst Mat & Reactivos, San Lazaro & L Vedado Plaza, La Habana 10400, Cuba TI - Extraction of parameters of homogeneous nonideal Schottky contacts using I-V measurements AB - A novel method to determine effective barrier heights in homogeneous nonideal Schottky contact from I-V measurements is proposed. This method takes into account the different mechanisms of current now through the metal-semiconductor interface. The total current has been expressed as the sum of two independent terms which are: (i) the thermionic current where the ideality factor value is equal to one and (ii) the contribution of different transport mechanisms. The second term responds to a general expression of the thermionic emission theory where the barrier height and the ideality factor are voltage dependent. The effective barrier height is found by means of subtraction of the transport mechanisms term from the total current. The method was applied to a group of I-V curves which were simulated numerically using the well known theoretical expression of different transport mechanisms MH - Cuba MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800141 L2 - ELECTRON-TRANSPORT; DIODES SO - Physica Status Solidi B-Basic Research 2000 ;220(1):789-792 941 UI - 16358 AU - Hernandez MP AU - Iribarren A AU - Torres MZ AU - Bartolo P AU - Sosa V AU - Pena JL AD - Univ Havana, IMRE, La Habana, CubaIPN, CICATA, Mexico City 11500, DF, MexicoIPN, CINVESTAV, Dept Appl Phys, Unidad Merida, Merida 97310, Yuc, MexicoHernandez, MP, Univ Havana, IMRE, 10400 Vedado, La Habana, Cuba TI - Compounds of the CdTe-In2Te3 system in CdTe-In film grown by the close-spaced vapor transport technique combined with free evaporation AB - Polycrystalline thin films of CdTe-In were grown by the close-spaced vapor transport technique combined with free evaporation of In. The indium concentration in the samples increased according to the rise in temperature of the In source. X-ray diffraction analysis allowed us to identify the CdTe (or) phase in all samples, together with the CdIn2Te4 (beta) phase in the samples grown at the highest temperatures of the In source. Auger electron spectroscopy was used to quantify the chemical composition of the films. The sensitivity factors were calculated assuming that the solid solution (CdTe)(1-x)(In2Te3)(x) was formed. For samples of low In concentration, the lattice parameter decreased linearly with the molar percent of In2Te3 in CdTe. This behavior corroborated the presence of the solid solution. (C) 2000 American Vacuum Society. [S0734-2101(00)01902-3] MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000085831200025 L2 - CDIN2TE4 SO - Journal of Vacuum Science & Technology A-Vacuum Surfaces and Films 2000 ;18(2):435-437 942 UI - 15269 AU - Hernandez R AU - He HQ AU - Chen AC AU - Waghela SD AU - Ivie GW AU - George JE AU - Wagner GG AD - Texas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843, USACenid Parasitol Vet INIFAP SAGAR, Civac 62500, Morelos, MexicoARS, Food Anim Protect Res Lab, USDA, College Stn, TX 77845, USAARS, Knipling Bushland US Livestock Insects Res Lab, USDA, Kerrville, TX 78028, USAWagner, GG, Texas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843 USA TI - Identification of a point mutation in an esterase gene in different populations of the southern cattle tick, Boophilus microplus AB - Two esterase cDNA sequences were obtained from susceptible and organophosphorus resistant strains of Boophilus microplus. Both sequences have a high degree of homology to carboxylesterase B. One gene has identical sequences in both strains and the other showed two point mutations. One mutation produces an amino acid substitution when the amino acid sequence is deduced, this mutation was detected in six different populations susceptible and resistant to insecticides, but a pyrethroid resistant strain was the only one that showed only the mutant allele. Identification of this mutation and the strong signal detected in southern blot with this strain, suggest that esterases are contributing to detoxification of pyrethroid compounds, as a resistant mechanism in Mexican strains of the southern cattle tick. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0965-1748 UR - ISI:000089324600008 L2 - Boophilus microplus;esterases;point mutation;pyrethroid resistance;southern blot;INSECTICIDE RESISTANCE; AMPLIFICATION; ACETYLCHOLINESTERASE; IXODIDAE; ACARI; CDNA SO - Insect Biochemistry and Molecular Biology 2000 ;30(10):969-977 943 UI - 16667 AU - Hernandez S AU - Sanchis M AU - Tkacenko M AD - Univ Jaume I, Dept Matemat, Castello 12071, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoSanchis, M, Univ Jaume I, Dept Matemat, Campus Penyeta Roja S-N, Castello 12071, Spain TI - Bounded sets in spaces and topological groups AB - We investigate C-compact and relatively pseudocompact subsets of Tychonoff spaces with a special emphasis given to subsets of topological groups. It is shown that a relatively pseudocompact subset of a space X is C-compact in X, but not vice versa. If, however, X is a topological group, then these properties coincide. A product of two C-compact (relatively pseudocompact) subsets A of X and B of Y need not be C-compact (relatively pseudocompact) in X x Y, but if one of the factors X, Y is a topological group, then both C-compactness and relative pseudocompactness are preserved. We Drove under the same assumption that, with A and B being bounded subsets of X and Y, the closure of A x B in upsilon(X x Y) is naturally homeomorphic to cl(upsilon X)A x cl(upsilon Y)B, where upsilon stands for the Hewitt realcompactification. One of our main technical tools is the notion of an R-factorizable group. We show that an R-factorizable subgroup H of an arbitrary group G is z-embedded in G. This fact is applied to prove that the group operations of an R-factorizable group G can always be extended to the realcompactification upsilon G of G, thus giving to upsilon G the topological group structure, We also prove that a C-compact subset A of a topological group G is relatively pseudocompact in the subspace B = A . A(-1) . A of G. (C) 2000 Elsevier Science B.V, All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000084650800002 L2 - bounded;relatively pseudocompact;C-compact;z-embedded;R-factorizable group;realcompactification;distribution law;COMPACT; SUBSETS SO - Topology and Its Applications 2000 ;101(1):21-43 944 UI - 15074 AU - Hernandez X AU - Gilmore G AU - Valls-Gabaud D AD - Univ Cambridge, Inst Astron, Cambridge, EnglandNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoObserv Midi Pyrenees, CNRS, UMR 552, F-31400 Toulouse, FranceHernandez, X, Univ Cambridge, Inst Astron, Madingley Rd, Cambridge, England TI - Non-parametric star formation histories for four dwarf spheroidal galaxies of the Local Group AB - We use recent Hubble Space Telescope colour-magnitude diagrams of the resolved stellar populations of a sample of local dSph galaxies (Carina, Leo I, Leo II and Ursa Minor) to infer the star formation histories of these systems, SFR(t). Applying a new variational calculus maximum likelihood method, which includes a full Bayesian analysis and allows a non-parametric estimate of the function one is solving for, we infer the star formation histories of the systems studied. This method has the advantage of yielding an objective answer, as one need not assume a priori the form of the function one is trying to recover. The results are checked independently using Saha's W statistic. The total luminosities of the systems are used to normalize the results into physical units and derive SN type II rates. We derive the luminosity-weighted mean star formation history of this sample of galaxies MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 54 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000089857200010 L2 - methods : statistical;stars : formation;galaxies : evolution;Local Group;COLOR-MAGNITUDE DIAGRAM; LARGE MAGELLANIC CLOUD; DEEP CCD PHOTOMETRY; LEO-I; HORIZONTAL BRANCHES; STELLAR POPULATIONS; VARIABLE-STARS; MILKY-WAY; AGE; MODELS SO - Monthly Notices of the Royal Astronomical Society 2000 ;317(4):831-842 945 UI - 15951 AU - Herrera-Gomez A AU - Pianetta P AU - Marshall D AU - Nelson E AU - Spicer WE AD - CINVESTAV, Queretaro, MexicoStanford Synchrotron Radiat Lab, Stanford, CA 94305, USAMotorola Inc, Phys Sci Res Labs, Tempe, AZ 85284, USAHerrera-Gomez, A, CINVESTAV, AP 101, Queretaro, Mexico TI - Geometrical structure of the 1/2-ML (2X1) and 1/3-ML (2X3) Ba/Si(001) interfaces AB - The adsorption site of Ba deposited on a clean Si(001) surface was measured using x-ray standing-wave spectroscopy (XSW). Two interfaces were considered: half a monolayer with a (2 X 1) surface symmetry, and a third of a monolayer with a (2 X 3) symmetry. Two (111)-like Bragg reflections, ((1) over bar (1) over bar 1) and ((1) over bar (1) over bar 1), were utilized in the XSW experiments. Using the structural results obtained from these two reflections, as well as symmetry arguments, it was possible to establish, in three dimensions, the coordinates of the adsorption site for the two interfaces considered. In both cases, Ba lies near the center of the square formed by four Si surface atoms, at a height close to the projection of the next ideal Si(001) plane MH - Mexico|Queretaro MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000087159100080 L2 - RAY SO - Physical Review B 2000 ;61(19):12988-12991 946 UI - 16386 AU - Herrera LA AU - Ramirez T AU - Rodriguez U AU - Corona T AU - Sotelo J AU - Lorenzo M AU - Ramos F AU - Verdorfer I AU - Gebhart E AU - Ostrosky-Wegman P AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Genet & Toxicol Ambiental, Mexico City 04510, DF, MexicoSecretaria Salud, Inst Nacl Neurol & Neurocirugia, Mexico City, DF, MexicoHosp Gen Mexico, Unidad Neurol, Mexico City, DF, MexicoUniv Erlangen Nurnberg, Inst Humangenet, Erlangen, GermanyHerrera, LA, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Genet & Toxicol Ambiental, POB 70-228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Possible association between Taenia solium cysticercosis and cancer: increased frequency of DMA damage in peripheral lymphocytes from neurocysticercosis patients AB - Helminths, particularly some Schistosoma species, have been associated with cancer in humans. Neurocysticercosis produced by cysticerci of the helminth Taenia solium, has been associated with the emergence of brain tumours and haematological malignancies. Local tumours, such as glioblastoma, could be explained by the induction of DNA damage in cells surrounding the cysticercus and chronically exposed to an inflammatory host response. However, systemic effects such as haematological malignancies are not easy to understand. The present work was conducted in Mexico: to find out whether DNA damage arises in peripheral lymphocytes in patients with neurocysticercosis. We utilized a highly sensitive technique to analyse chromosomal aberrations, in-situ hybridization with probes against chromosomes 1, 2 and 4, and in addition the blocked-cytokinesis technique was used to determine the formation of micronuclei, a peculiar form of DNA damage. The study was made in lymphocytes from 8 patients before and after the administration of praziquantel, 1 of the 2 drugs used for neurocysticercosis treatment. The frequencies of chromosome aberrations and micronuclei in peripheral blood lymphocytes were higher in the infected patients as compared to those observed both in healthy donors and in the group of patients after praziquantel therapy. Our results suggest that chromosome aberrations induced in peripheral cells during neurocysticercosis could be associated with the development of haematological neoplasias MH - Germany MH - Mexico|Distrito Federal PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 14 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000085825800022 L2 - neurocysticercosis;Taenia solium;cancer;chromosome aberrations;Mexico;INSITU HYBRIDIZATION; SCHISTOSOMIASIS PATIENTS; CHROMOSOME-ABERRATIONS; PRAZIQUANTEL; INVOLVEMENT; INFECTIONS SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2000 ;94(1):61-65 947 UI - 15217 AU - Herrera LG AU - Leblanc D AU - Nassar J AD - Lubee Fdn Inc, Gainesville, FL 32609, USAUniv Miami, Dept Biol, Coral Gables, FL 33124, USAHerrera, LG, Natl Autonomous Univ Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico TI - Sugar discrimination and gustatory thresholds in captive-born frugivorous Old World Bats AB - In general, preference for different sugars in nectarivores and frugivores is related to the composition of their food. We determined individual preferences in Cynopterus brachyotis and Pteropus rodricensis, and group preferences in one group of P. rodricensis and two mixed groups of P. rodricensis, P. pumilus, P. vampyrus, and P. hypomelanus. Most bats were born in captivity and received a diet with a composition of sugars of sucrose = glucose > fructose during 1 to 6 years before the experiment. We tested the hypothesis that diet composition influences food preferences, and predicted that bats would not discriminate between sucrose and glucose, and would prefer sucrose and glucose over fructose. Individuals and groups consistently favored sucrose over glucose and fructose, and fructose over glucose. We also determined gustatory thresholds for (0.15% weight/weight) than fructose (> 0.5%) and glucose (0.5%). Food preferences, in general, did not match the composition of the diet. Gustatory thresholds may be a valid proximate reason to explain preference for sucrose over glucose and fructose, but not for preference for fructose over glucose MH - Mexico|Distrito Federal MH - USA PB - PARIS: MUSEUM NAT HIST NATURELLE RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0025-1461 UR - ISI:000089350100001 L2 - plant-animal interactions;frugivory;nectarivory;food preferences;taste thresholds;sugars;PREFERENCES; HUMMINGBIRDS; NECTAR; CHOICE; FRUIT SO - Mammalia 2000 ;64(2):135-143 948 UI - 15826 AU - Hess PO AU - Misicu S AU - Greiner W AU - Scheid W AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Inst Nucl Phys, Bucharest, RomaniaUniv Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, GermanyUniv Giessen, Inst Theoret Phys, D-35392 Giessen, GermanyHess, PO, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior,CU,AP 70-543, Mexico City 04510, DF, Mexico TI - Collective modes of tri-nuclear molecules AB - A geometrical model for tri-nuclear molecules is presented. An analytical solution is obtained provided the nuclei, which ate taken to be prolately deformed, are connected in line to each other. Furthermore, the tri-nuclear molecule is composed of two heavy and one light cluster, the latter sandwiched between the two heavy clusters. A basis is constructed in which Hamiltonians of more general configurations can be diagonalized. In the calculation of the interaction between the clusters higher multipole deformations are taken into account, including the hexadecupole one. A repulsive nuclear core is introduced in the potential in order to ensure a quasi-stable configuration of the system. The model is applied to three nuclear molecules, namely Sr-96 + Be-10 + Ba-146, Mo-108+ Be-10 + Te-134 and Ru-112 + Be-10 + Sn-130 MH - Germany MH - Mexico|Distrito Federal MH - Romania PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0954-3899 UR - ISI:000087723400020 L2 - COLD-FISSION; STATE; POTENTIALS; POCKETS; CF-252 SO - Journal of Physics G-Nuclear and Particle Physics 2000 ;26(6):957-980 949 UI - 16284 AU - Hidalgo A AU - Schewe C AU - Petersen S AU - Salcedo M AU - Gariglio P AU - Schluns K AU - Dietel M AU - Petersen I AD - Univ Hosp Charite, Inst Pathol, D-10093 Berlin, GermanyIMSS, Nat Med Ctr S XXI, Oncol Dis Res Unit, Mexico City, DF, MexicoIPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07738, DF, MexicoPetersen, I, Univ Hosp Charite, Inst Pathol, Schumannstr 20-21, D-10093 Berlin, Germany TI - Human papilloma virus status and chromosomal imbalances in primary cervical carcinomas and tumour cell lines AB - Human papilloma virus (HPV) infection is the crucial step in the initiation of cervical carcinomas. In addition, HPV18 has been implicated in tumour progression and adverse clinical outcome, We determined the HPV types in 12 primary cervical carcinomas and 12 cell lines and compared the findings with the comparative genetic hybridisation (CGH) pattern of chromosomal alterations. The most frequent alteration was the deletion at 3p14 followed by the loss of 2q34-q36 along with 3q gain. High risk HPV types were detected in all samples except one primary tumour, In contrast to the normal distribution, HPV 18 was present in 75% of cases including all cell lines. The cell lines carried a higher number of genetic alterations and a different CGH pattern for several chromosomes than the primary tumours, despite microdissection. Purely HPV18 positive cases indicated a high incidence of imbalances at specific loci with peaks of the histogram coinciding with known HPV integration sites. The study suggests that HPV infection is associated with a recurrent pattern of chromosomal changes in cervical carcinomas and that the development and progression of these alterations is triggered by integration into the host gnome, (C) 2000 Elsevier Science Ltd, All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 31 U4 - Oncology U5 - J;Article AV - English IS - 0959-8049 UR - ISI:000086227800024 L2 - CGH;cervical carcinoma;HPV;chromosomal imbalances;CANCER; INTEGRATION; TYPE-18; GAIN; INSTABILITY; IMMORTALITY; PREVALENCE; TRANSITION; ONCOGENES; LOSSES SO - European Journal of Cancer 2000 ;36(4):542-548 950 UI - 16584 AU - Higgins L AD - Univ Nacl Autonoma Mexico, Ctr Ecol, Mexico City 04510, DF, MexicoHiggins, L, Univ Massachusetts, Dept Entomol, Fernald Hall, Amherst, MA 01003 USA TI - The interaction of season length and development time alters size at maturity AB - An end-of-season penalty, with late-maturing individuals being smaller than early-maturing individuals, has been observed in a variety of univoltine terrestrial arthropods. The current study extends these observations, utilizing multiple populations of a single sexually dimorphic species to examine the ecological correlates and fitness consequences of late maturation at a small size. The orb-weaving spider, Nephila clavipes, inhabits a broad range of habitats that vary from mild to strong seasonality. Because males mature several instars earlier than females, they can reach maturity much earlier in the growing season. Within a cohort, I found that female size at maturity was negatively correlated with timing of maturation in strongly seasonal sites. At a less seasonal site, there was no correlation between female size and timing of maturation within a cohort. In most populations studied, male size was not correlated with the timing of maturation within a cohort. Within populations in strongly seasonal sites, late-maturing females had reduced fecundity. The probability of copulation, survivorship from maturity to first clutch, clutch size relative to female size, and the number of possible clutches were all reduced with delayed maturation. The probability of prereproductive death for late-maturing females was strongly affected by stochasticity in the timing of the end of the growing season MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Ecology U5 - J;Article AV - English IS - 0029-8549 UR - ISI:000084946900007 L2 - life-history;phenology;sexual dimorphism;fitness;Nephila clavipes;SPIDER NEPHILA-CLAVIPES; ORB-WEAVING SPIDER; BODY-SIZE; PLASTICITY; ARANEIDAE; ARANEAE; JUVENILE; GROWTH; COMPETITION; BEHAVIOR SO - Oecologia 2000 ;122(1):51-59 951 UI - 15010 AU - Higo H AU - Yanagi T AU - Matta V AU - Agatsuma T AU - Cruz-Reyes A AU - Uyema N AU - Monroy C AU - Kanbara H AU - Tada I AD - Kyushu Univ, Grad Sch Med, Dept Parasitol, Higashi Ku, Fukuoka 8128582, JapanNagasaki Univ, Inst Trop Med, Dept Protozool, Nagasaki, JapanKochi Med Sch, Dept Environm Hlth Sci, Kochi, JapanUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoHigo, H, Kyushu Univ, Grad Sch Med, Dept Parasitol, Higashi Ku, Maidasi 3-1-1, Fukuoka 8128582, Japan TI - Genetic structure of Trypanosoma cruzi in American continents: special emphasis on sexual reproduction in Central America AB - Isozyme analysis (12 enzymes:14 loci) was conducted on 99 isolates of Trypanosoma cruzi: 77 from Guatemala, 5 from Mexico and 17 from South American countries. Analyses of 4 population-genetic indices were undertaken to assess the possibility of generic exchange occurring among Guatemalan isolates. The results provide evidence for a degree of genetic exchange occurring among isolates from this relatively small geographical area. Previous studies of population genetics on T. cruzi might have failed to detect this phenomenon because they tended to use isolates originating far from one another, rendering gene exchange unlikely for geographical reasons. Phylogenetic data, presented here, show considerable differences in genetic structure between Central and South American isolates, suggesting that different biological and clinical properties might be expected. For example, there are differences in clinical syndromes between Central and South America, a situation discussed further here MH - Japan MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Parasitology U5 - J;Article AV - English IS - 0031-1820 UR - ISI:000090071900008 L2 - Trypanosoma cruzi;genetic recombination;Chagas' disease;isozyme;phylogeny;pathogenicity;CHAGAS-DISEASE; NATURAL-POPULATIONS; VARIABILITY; ZYMODEMES; STRAINS; DIVERSITY; CYCLES; BRAZIL; STOCKS; CHILE SO - Parasitology 2000 ;121():403-408 952 UI - 15361 AU - Hijar M AU - Chu LD AU - Kraus JF AD - Univ Calif Los Angeles, Sch Publ Hlth, So Calif Injury Prevent Res Ctr, Los Angeles, CA 90095, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoKraus, JF, Univ Calif Los Angeles, Sch Publ Hlth, So Calif Injury Prevent Res Ctr, 10833 Le Conte Ave, Los Angeles, CA 90095 USA TI - Cross-national comparison of injury mortality: Los Angeles County, California and Mexico City, Mexico AB - Background Cross-national comparisons of injury mortality can suggest possible causal explanations for injuries across different countries and cultures. This study identifies differences in injury mortality between Los Angeles (LA) County, California and Mexico City DF, Mexico. Methods Using LA County and Mexico City death certificate data for 1994 and 1995, injury deaths were classified according to the International Classification of Diseases Ninth Revision-Clinical Modification external cause of injury codes. Crude, gender-, and age-adjusted annual fatality rates were calculated and comparisons were made between the two regions. Results Overall and age-adjusted injury death rates were higher for Mexico City than for LA County. Injury death rates were found to be higher for young adults in LA County and for elderly residents of Mexico City. Death rates for motor vehicle crashes, falls, and undetermined causes were higher in Mexico City, and relatively high rates of poisoning, homicide, and suicide were found for LA County. Motor vehicle crash and fall death rates in Mexico City increased beginning at about age 55, while homicide death rates were dramatically higher among young adults in LA County. The largest proportion of motor vehicle crash deaths was to motor vehicle occupants in LA County and to pedestrians in Mexico City. Conclusions These findings illustrate the importance of primary injury prevention in countries having underdeveloped trauma care systems and should aid in setting priorities for future work. The high frequency of pedestrian fatalities in Mexico City may be related to migration of rural populations, differing vehicle characteristics and traffic patterns, and lack of safety knowledge. Mexico City's higher rate of fall-related deaths may be due to concurrent morbidity from chronic conditions, high-risk environments, and delay in seeking medical treatment MH - USA MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 11 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0300-5771 UR - ISI:000089069400016 L2 - mortality;injury deaths;external cause;rates;UNITED-STATES; NEW-ZEALAND SO - International Journal of Epidemiology 2000 ;29(4):715-721 953 UI - 14773 AU - Hilgert N AU - Hernandez-Lerma O AD - Inst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoINRA, ENSAM, Lab Biometrie, F-34060 Montpellier 1, FranceHernandez-Lerma, O, Inst Politecn Nacl, CINVESTAV, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Limiting optimal discounted-cost control of a class of time-varying stochastic systems AB - We consider a class of time-varying R-d-valued control models, and with possibly unbounded costs. The processes evolve according to the system equation x(n+l) = G(n)(x(n), a(n))+ zeta (n) (n is an element of N), where (zeta (n)) are i.i.d. random vectors and (G(n)) a sequence of known functions converging to some function G(infinity). Under suitable hypotheses, we show the existence of an alpha -discount optimal policy for the limiting system x(n+1) = G(infinity)(x(n), a(n)) + zeta (n). O (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6911 UR - ISI:000165575900006 L2 - non-homogeneous Markov control processes;discrete-time stochastic systems;discounted cost criterion;optimal policies;approximation of control models;MARKOV CONTROL PROCESSES; UNBOUNDED COSTS; ADAPTIVE-CONTROL; CRITERIA; AVERAGE SO - Systems & Control Letters 2000 ;40(1):37-42 954 UI - 16215 AU - Hiriart D AU - Kwan J AD - Univ Massachusetts, Dept Phys & Astron, Amherst, MA 01003, USAUniv Massachusetts, Five Coll Radio Astron Observ, Amherst, MA 01003, USAHiriart, D, UNAM, Inst Astron, Apdo Postal 877, Ensenada 22830, Baja California, Mexico TI - Circumstellar gas, dust emission, and mass loss from evolved carbon stars AB - A model to calculate the circumstellar dust emission of an evolved carbon star is developed, and the relations between the infrared flux densities at 2.2, 12, 25, and 60 mu m and the dust properties are described. The model is combined with a preexisting model for CO emission, keeping physical quantities consistent between the two models. The results are used to analyze the infrared and CO data of a sample of 17 evolved carbon stars. The dust-shell opacity determined from the 60 mu m flux density correlates well with that determined from the [25]-[2.2], [60]-[12], and [25]-[12] colors over a range of almost 4 orders of magnitude within the sample. The scaled mass-loss rate hi is revealed through the CO line profile observational parameter z(dagger) = (M/1.5 x 10(-6) M. yr(-1)){([CO]/[H-2])/6.4 x 10(-4)}[(L-*/L.)/10(4)](-0.5), which ranges from 0.2 to 30 and averages 4.3. The envelope dust-to-gas mass ratio, f, is found to be less than or similar to 10(-3) on the assumption of usual values of [CO]/[H-2] and dust absorption efficiency. Typical grain radii a are found to be very small, with a geometric mean of less than or similar to 2 nm. It does not appear that the dust properties, such as f and a, have a direct, strong influence on the mass-loss rate, but the selected sample is, admittedly, small MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086468500019 L2 - circumstellar matter;dust, extinction;infrared : stars;stars : carbon;LOSS RATES; OXYGEN-RICH; SUBMILLIMETER OBSERVATIONS; INFRARED-EMISSION; STELLAR EVOLUTION; CO EMISSION; RED GIANTS; IRC+10216; ENVELOPE; TRANSITION SO - Astrophysical Journal 2000 ;532(2):1006-1020 955 UI - 16161 AU - Ho M AU - Clark BJ AU - Smith VH AU - Weaver DF AU - Gatti C AU - Sagar RP AU - Esquivel RO AD - Queens Univ, Dept Chem, Kingston, ON K7L 3N6, CanadaCNR, CSRSRC, Dept Phys Chem & Electrochem, I-20133 Milan, ItalyUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoHo, M, Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada TI - Shannon information entropies of molecules and functional groups in the self-consistent reaction field AB - The Shannon information entropies in position and momentum space of H2O, HCN, HOOH, NH3, CH2O2, CH3NH2, CH3OH, CH3CHO, CH3OCH3, CH3COCH3, NH2OH, NH2COH, and CH3NHCOH at the RHF/6-31++G** level in vacuo and in the Onsager aqueous field, were calculated and correlated with various properties. The local entropy of atoms and functional groups in these molecules were also investigated. The results show that the response of the electron density of the groups to solvation is such as to minimize electron transfer to or from the group, and its associated entropy change, which implies a stability of the functional groups within the molecular framework. The effect of solvent fields with increasing dielectric constant on the Shannon entropy of water was studied. The relationships between position and momentum densities through the Shannon entropy are discussed. (C) 2000 American Institute of Physics. [S0021-9606(00)51216-1] MH - Canada MH - Italy MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000086523800033 L2 - AUTOMATIC NUMERICAL-INTEGRATION; EFFICIENT; SCHEME SO - Journal of Chemical Physics 2000 ;112(17):7572-7580 956 UI - 16556 AU - Ho M AU - Schmider HL AU - Weaver DF AU - Smith VH AU - Sagar RP AU - Esquivel RO AD - Queens Univ, Dept Chem, Kingston, ON K7L 3N6, CanadaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoSmith, VH, Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada TI - Shannon entropy of chemical changes: S(N)2 displacement reactions AB - The Shannon entropies along the intrinsic reaction coordinates (IRC) of two S(N)2 reactions were calculated at the RHF/6-31++G** level. The resulting entropic profiles were compared with the corresponding energy profiles. The Shannon entropy profiles in position and momentum space, as well as their sum, show interesting features about the bond forming and breaking process that are not apparent from the conventional reaction energy profile. (C) 2000 John Wiley & Sons, inc MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000085144900035 L2 - Shannon information entropy;momentum and charge density analysis;S(N)2 reaction;intrinsic reaction coordinates;reaction energy profile;AUTOMATIC NUMERICAL-INTEGRATION; ATOMIC INFORMATION ENTROPIES; MOMENTUM-SPACE; MOLECULES; EFFICIENT; DENSITY; SCHEME SO - International Journal of Quantum Chemistry 2000 ;77(1):376-382 957 UI - 15876 AU - Homey B AU - eu-Nosjean MC AU - Wiesenborn A AU - Massacrier C AU - Pin JJ AU - Oldham E AU - Catron D AU - Buchanan ME AU - Muller A AU - Malefyt RD AU - Deng G AU - Orozco R AU - Ruzicka T AU - Lehmann P AU - Lebecque S AU - Caux C AU - Zlotnik A AD - DNAX Res Inst, Palo Alto, CA 94304, USASchering Plough, Lab Immunol Res, Dardilly, FranceUniv Dusseldorf, Dept Dermatol, D-4000 Dusseldorf, GermanyInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoZlotnik, A, DNAX Res Inst, 901 Calif Ave, Palo Alto, CA 94304, USA TI - Up-regulation of macrophage inflammatory protein-3 alpha/CCL20 and CC chemokine receptor 6 in psoriasis AB - Autoimmunity plays a key role in the immunopathogenesis of psoriasis; however, little is known about the recruitment of pathogenic cells to skin lesions. We report here that the CC chemokine, macrophage inflammatory protein-3 alpha, recently renamed CCL20, and its receptor CCR6 are markedly up-regulated in psoriasis, CCL20-expressing keratinocytes colocalize viith skin-infiltrating T cells in lesional psoriatic skin. PBMCs derived from psoriatic patients show significantly increased CCR6 mRNA levels. Moreover, skin-homing CLA(+) memory T cells express high levels of surface CCR6, Furthermore, the expression of CCR6 mRNA is 100- to 1000-fold higher on sorted CLA(+) memory T cells than other chemokine receptors, including CXCR1, CXCR2, CXCR3, CCR2, CCR3, and CCR5, In vitro, CCL20 attracted skin-homing CLA(+) T cells of both normal and psoriatic donors; however, psoriatic lymphocytes responded to lower concentrations of chemokine and showed higher chemotactic responses. Using ELISA as well as real-time quantitative PCR, we show that cultured primary keratinocytes, dermal fibroblasts, and dermal microvascular endothelial and dendritic tells are major sources of CCL20, and that the expression of this chemokine can be induced by proinflammatory mediators such as TNF-alpha/IL-1 beta, CD40 ligand, IFN-gamma, or IL-17, Taken together, these findings strongly suggest that CCL20/CCR6 may play a role in the recruitment of T cells to lesional psoriatic skin MH - France MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 153 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000087508500067 L2 - NECROSIS-FACTOR-ALPHA; MONOCLONAL-ANTIBODY THERAPY; HUMAN DENDRITIC CELLS; IL-8 MESSENGER-RNA; MEMORY T-CELLS; DIFFERENTIAL EXPRESSION; HUMAN KERATINOCYTES; ADHESION MOLECULES; INTERFERON-GAMMA; PROTEIN 3-ALPHA SO - Journal of Immunology 2000 ;164(12):6621-6632 958 UI - 16322 AU - Homey B AU - Wang W AU - Soto H AU - Buchanan ME AU - Wiesenborn A AU - Catron D AU - Muller A AU - McClanahan TK AU - eu-Nosjean MC AU - Orozco R AU - Ruzicka T AU - Lehmann P AU - Oldham E AU - Zlotnik A AD - DNAX Res Inst Mol & Cellular Biol Inc, Palo Alto, CA 94304, USAUniv Dusseldorf, Dept Dermatol, D-4000 Dusseldorf, GermanySchering Plough SpA, Lab Immunol Res, Dardilly, FranceInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoZlotnik, A, DNAX Res Inst, Dept Immunobiol, 901 Calif Ave, Palo Alto, CA 94303 USA TI - Cutting edge: The orphan chemokine receptor G protein-coupled receptor-2 (GPR-2, CCR10) binds the skin-associated chemokine CCL27 (CTACK/ALP/ILC) AB - We recently reported the identification of a chemokine (CTACK), which has been renamed CCL27 according to a new systematic chemokine nomenclature. We report that CCL27 binds the previously orphan chemokine receptor GPR-2, as detected by calcium flux and chemotactic responses of GPR-2 transfectants, We renamed this receptor CCR10, Because of the skin-associated expression pattern of CCL27, we focused on the expression of CCL27 and CCR10 in normal skin compared with inflammatory and autoimmune skin diseases, CCL27 is constitutively produced by keratinocytes but can also be induced upon stimulation with TNF-alpha and IL-1 beta, CCR10 is not expressed by keratinocytes and is instead expressed by melanocytes, dermal fibroblasts, and dermal microvascular endothelial cells. CCR10 was also detected in T cells as well as in skin-derived Langerhans cells, Taken together, these observations suggest a role for this novel ligand/receptor pair in both skin homeostasis as well as a potential role in inflammatory responses MH - USA MH - France MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 115 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000086020700003 L2 - DENDRITIC CELLS; T-CELLS; RECRUITMENT; EXPRESSION; SITES SO - Journal of Immunology 2000 ;164(7):3465-3470 959 UI - 14987 AU - Hourbron E AU - Escoffier S AU - Capdeville B AD - Inst Tecnol Orizaba Ave, Orizaba 94320, Ver, MexicoINSA, Unite Rech & Traitement Biol, Toulouse, FranceHourbron, E, Inst Tecnol Orizaba Ave, 852, Orizaba 94320, Ver, Mexico TI - Trichloroethylene elimination assay by naural consortia of heterotrophic and methanotrophic bacteria AB - Xenobiotic compounds generated from the various industrial activities are toxic and could affect the natural ecosystem. So far biological processes have been used for treatment of those compounds. It has been reported that xenobiotic compounds can be degraded in pure cultures of methanotrophic bacteria. Therefore, the aim of this study is to demonstrate the capacity of several natural consortia of heterotrophic and methanotrophic bacteria in degradation of trichloroethylene (TCE). Treatability of TCE was studied using 3 different consortia of heterotrophic and methanotrophic bacteria. After a first culture with methane and contact with TCE, all the consortia tested showed a biological TCE degradation efficiency between 29 and 43%. Using acetylene as MMO inhibitor, the implication of this enzyme on the three inocula was demonstrated very well. It was found that the toxicity threshold of TCE to the tested bacteria fell into a range of 30 to 40 mg/l. At not toxic TCE concentration of 5 and 10 mg/l, the maximal TCE specific activity was observed after an incubation of 15 minutes. This initial degradation rate could be used as indicator of the efficiency of a natural inoculum for TCE degradation. The impact of the initial TCE and biomass concentration on the TCE degradation kinetics was also evaluated. In the experiments, the TCE degradation was subject to first order kinetics. The maximum specific degradation rate of TCE was estimated at 48.9 mg TCE/mg SST.h. These experiments clearly demonstrate that methanotrophic bacteria are ubiquitous in the environment, and a lot of them can degrade TCE. This shows good perspectives for in situ treatment of TCE-contaminated sites by enrichment of the methanotrophic natural populations MH - France MH - Mexico|Veracruz PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400055 L2 - methanotrophic bacteria;mixed culture;trichloroethylene;METHANE SO - Water Science and Technology 2000 ;42(5-6):395-402 960 UI - 14280 AU - Hovorka S AU - Dohnal V AU - Carrillo-Nava E AU - Costas M AD - Inst Chem Technol, Dept Phys Chem, CR-16628 Prague 6, Czech RepublicUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Lab Termofis, Mexico City 04510, DF, MexicoDohnal, V, Inst Chem Technol, Dept Phys Chem, CR-16628 Prague 6, Czech Republic TI - Infinite dilution activity coefficients for benzene and toluene in water and in aqueous solutions of the protein denaturants urea and guanidine hydrochloride AB - Experimental infinite dilution activity coefficients gamma (infinity)(1) for benzene and toluene in water and in aqueous solutions of two protein denaturants, urea and guanidine hydrochloride, are reported. The quantities were measured in the temperature range (273 to 323) K. Four denaturant concentrations were used from (0.5 to 5.0) mol.dm(-3), covering the range where proteins undergo chemical denaturation. For both solutes in water, from the freezing temperature of water, gamma (infinity)(1) rises with increasing temperature, passes through a maximum close to room temperature, and then continuously decreases with increasing temperature. Based on the results reported here and selected literature values, recommended correlations of gamma (infinity)(1)(T) for benzene and toluene in water were established. They clearly show that from the freezing temperature to the normal boiling temperature of water, the origin of the hydrophobicity of the non-polar solutes changes from being entropic to enthalpic in nature. The presence of a denaturant (modifier) produces a significant decrease of gamma (infinity)(1) values, their maximum being displaced towards lower temperatures. The effect is more pronounced for guanidine hydrochloride, which acts as a better solubilizing agent than urea. The solute in (water + modifier) gamma (infinity)(1) data were analysed by a classical thermodynamic scheme employing solution and transfer {water to (water + modifier)} quantities. The accuracy of the data allowed the derivation of enthalpies, entropies, and heat capacities and a detailed discussion of the several observed trends. A remarkable feature is that there is only a narrow temperature interval where both the enthalpic and entropic contributions to the Gibbs energy are favourable to solute transfer. At lower and higher temperatures, the enthalpic and entropic components compete, solute transfer being favoured by entropy or by enthalpy, respectively. Extrapolation of this behaviour suggests that the effect of the modifier on the solubility of hydrophobic solutes should eventually invert at both lower and higher temperatures. The data presented here might be used to understand better, through the application of different models, the exposure of non-polar amino acid side chains from the protein interior to the aqueous environment, which characterizes protein denaturation. (C) 2000 Academic Press MH - Czech Republic MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 10 U4 - Thermodynamics;Chemistry, Physical U5 - J;Article AV - English IS - 0021-9614 UR - ISI:000166996400010 L2 - infinite dilution activity coefficients;benzene;toluene;inert gas stripping method;aqueous solutions;protein denaturants;urea;guanidine hydrochloride;thermodynamic properties of solution and transfer;SLIGHTLY SOLUBLE LIQUIDS; GAS STRIPPING METHOD; MUTUAL SOLUBILITIES; AMINO ACIDS; HYDROCARBONS; VAPOR; ALKYLBENZENES; CYCLOHEXANE; SYSTEMS SO - Journal of Chemical Thermodynamics 2000 ;32(12):1683-1705 961 UI - 16006 AU - Hribar B AU - Vlachy V AU - Pizio O AD - Univ Ljubljana, Dept Chem & Chem Technol, Ljubljana 1001, SloveniaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoVlachy, V, Univ Ljubljana, Dept Chem & Chem Technol, Ljubljana 1001, Slovenia TI - Structural and thermodynamic properties of electrolyte solutions in hard-sphere confinement: Predictions of the replica integral equation theory AB - The structural and thermodynamic properties of the primitive model for 1-1, 2-1, 3-1, and 4-1 electrolyte solutions in a disordered hard sphere matrix environment mimicking a microporous adsorbent were studied. The size of the matrix species and the matrix density were chosen as in the model of silica xerogel proposed by Kaminsky and Monson. The majority of the results of our study follows from the application of the replica Ornstein-Zernike (ROZ) integral equations complemented by the hypernetted-chain (HNC) closure. Theoretical predictions were tested versus Monte Carlo computer simulation results for one of the most difficult cases studied here, i.e., for a charge and size asymmetric 3-1 electrolyte, with the parameters mimicking LaCl3 solution. Steric effects due to matrix confinement are seen to influence substantially the equilibrium properties of the annealed electrolyte. In particular, our results show the development of a net attraction between the like-charged ions at small separations, not present in the absence of matrix. The pair distribution functions and thermodynamic properties of 3-1 electrolytes confined by the matrix were compared with data for pure electrolyte and with the results for a mixture of 3-1 electrolyte with a fully mobile neutral component. The excess chemical potential for adsorbed electrolyte in a dense uncharged matrix is close to that of the fully annealed mixture of the electrolyte and matrix species under the same conditions. We attribute this result to a large difference in size between the matrix and electrolyte particles, i.e., to low mobility of matrix particles versus the ions in the mixture. The comparison between Monte Carlo results and the replica integral equation theory for a 3-1 model electrolyte indicates the theory is successful: the ROZ/HNC approach provides reasonably accurate predictions for structural and thermodynamic properties MH - Mexico|Distrito Federal MH - Slovenia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000087003500028 L2 - ORNSTEIN-ZERNIKE EQUATIONS; ELECTRONEUTRAL CHARGED MATRICES; DISORDERED POROUS-MEDIA; ION-ION CORRELATIONS; ASSOCIATING ELECTROLYTES; PRIMITIVE MODEL; FLUIDS; ADSORPTION; APPROXIMATION SO - Journal of Physical Chemistry B 2000 ;104(18):4479-4488 962 UI - 14609 AU - Hsu WK AU - Zhu YQ AU - Boothroyd CB AU - Kinloch I AU - Trasobares S AU - Terrones H AU - Grobert N AU - Terrones M AU - Escudero R AU - Chen GZ AU - Colliex C AU - Windle AH AU - Fray DJ AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUniv Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, EnglandUniv Paris Sud, Phys Solides Lab, F-91405 Orsay, FranceUNAM, Inst Fis, Queretaro 76000, MexicoMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 01000, DF, MexicoWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Mixed-phase WxMoyCzS2 nanotubes AB - Mixed-phase WxMoyCzS2 nanotubes are generated when N-2/H2S is passed over a preoxidized mixture of WC and MO2C, maintained at an elevated temperature MH - United Kingdom MH - France MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000166073600005 L2 - CARBON NANOTUBES; BORON-NITRIDE; GROWTH; SUPERCONDUCTIVITY; NANOWIRES SO - Chemistry of Materials 2000 ;12(12):3541-+ 963 UI - 14744 AU - Hsu WK AU - Zhu YQ AU - Kroto HW AU - Walton DRM AU - Kamalakaran R AU - Terrones M AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Queretaro 76000, MexicoHsu, WK, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - C-MoS2 and C-WS2 nanocomposites AB - Composite C-MoS2 and C-WS2 nanostructures were produced by pyrolysing H2S/N-2 over a mixture of MoO3 (or WO3) and carbon particles/nanotubes. MoS2 particles embedded in the nanotubes were also observed occasionally. (C) 2000 American Institute of Physics. [S0003- 6951(00)04948-2] MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 18 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000165824200017 L2 - CARBON NANOTUBES; PURIFICATION; GROWTH; BORON SO - Applied Physics Letters 2000 ;77(25):4130-4132 964 UI - 14965 AU - Hsu WK AU - Chang BH AU - Zhu YQ AU - Han WQ AU - Terrones H AU - Terrones M AU - Grobert N AU - Cheetham AK AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Queretaro 76000, MexicoUniv Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - An alternative route to molybdenum disulfide nanotubes AB - Molybdenum disulfide ((MoS2)(n)) nanotubes are generated when polycrystalline MoS2 powder, covered by Mb Toil, is heated to ca. 1300 degreesC in the presence of H2S. Electron diffraction reveals the presence of zigzag arrangements within the tube walls MH - United Kingdom MH - Germany MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 36 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000090107600033 L2 - INORGANIC FULLERENE-LIKE; M = MO; CARBON NANOTUBES; OPTICAL-ABSORPTION; GROWTH SO - Journal of the American Chemical Society 2000 ;122(41):10155-10158 965 UI - 15788 AU - Hsu WK AU - Chu SY AU - Munoz-Picone E AU - Boldu JL AU - Firth S AU - Franchi P AU - Roberts BP AU - Schilder A AU - Terrones H AU - Grobert N AU - Zhu YQ AU - Terrones M AU - McHenry ME AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandCarnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv London Univ Coll, Christopher Ingold Labs, Dept Chem, London WC1H 0AJ, EnglandUniv Bayreuth, Lehrstuhl Expt Phys 2, D-95440 Bayreuth, GermanyBayreuther Inst Makromol Forsch, D-95440 Bayreuth, GermanyUNAM, Inst Fis, Queretaro 76000, MexicoWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Metallic behaviour of boron-containing carbon nanotubes AB - Paramagnetism in boron-containing carbon nanotubes was detected by SQUID measurements, and a g-value of 2.0020, corresponding to the free carrier spin, was observed over a wide temperature range (108-455 K). This value implies intrinsic metallic behaviour and contrasts with thermally activated semiconduction which multi-walled carbon nanotubes usually exhibit. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 28 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000087819300029 L2 - MAGNETIC-SUSCEPTIBILITY; ESR SO - Chemical Physics Letters 2000 ;323(5-6):572-579 966 UI - 15957 AU - Hsu WK AU - Firth S AU - Redlich P AU - Terrones M AU - Terrones H AU - Zhu YQ AU - Grobert N AU - Schilder A AU - Clark RJH AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUniv Coll London, Dept Chem, Christopher Ingold Labs, London WC1H 0AJ, EnglandMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Queretaro 76000, MexicoUniv Bayreuth, Lehrstuhl Expt Phys, D-95440 Bayreuth, GermanyBayreuther Inst Makromol Forsch, D-95440 Bayreuth, GermanyHsu, WK, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Boron-doping effects in carbon nanotubes AB - When nanotubes form in a carbon arc, the presence of boron results in long boron-doped carbon nanotubes which are generated as dominant zigzags. Metallic behaviour is observed, in contrast to carbon nanotubes, which are semi-conducting MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000087151800027 L2 - RAMAN-SCATTERING; GRAPHITE; NANOPARTICLES; SPECTROSCOPY; PURIFICATION; 1ST-ORDER; SYMMETRY; NITROGEN SO - Journal of Materials Chemistry 2000 ;10(6):1425-1429 967 UI - 16565 AU - Hsu WK AU - Li WZ AU - Zhu YQ AU - Grobert N AU - Terrones M AU - Terrones H AU - Yao N AU - Zhang JP AU - Firth S AU - Clark RJH AU - Cheetham AK AU - Hare JP AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Queretaro 76000, MexicoPrinceton Univ, Princeton Mat Inst, Princeton, NJ 08540, USAUniv Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAUniv Coll London, Christopher Ingold Labs, Dept Chem, London WC1H 0AJ, EnglandWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - KCl crystallization within the space between carbon nanotube walls AB - The are discharge method has been used hitherto to encapsulate metal-containing structures within carbon nanotubes [1,2], the arrangement of the nanotube walls playing an important role in the process. We show that KCl can be generated in the space between nanotube walls by treating potassium-intercalated uncapped tubes with CCl4. A relationship between the KCl crystal domain and the hexagonal carbon network is thought to give rise to preferential formation of a 100 plane perpendicular to the tube axes. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000085128300014 L2 - ENCAPSULATED NANOWIRES; DIAMOND; NANOPARTICLES; CLUSTERS; CARBIDE; MODEL SO - Chemical Physics Letters 2000 ;317(1-2):77-82 968 UI - 16383 AU - Hu WB AU - Zhu YQ AU - Hsu WK AU - Chang BH AU - Terrones M AU - Grobert N AU - Terrones H AU - Hare JP AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Queretaro 76000, MexicoHubei Natl Inst, Dept Chem, Hubei 445000, Enshi, Peoples R ChinaWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Generation of hollow crystalline tungsten oxide fibres AB - Hollow fibres of crystalline W18O49, arranged in a pine-tree-like structure, were generated by heating WS2 powder in oxygen. SEM, TEM, X-ray and electron diffraction studies show that the individual fibres are composed of single-crystal tungsten oxide whiskers. One-dimensional growth, involving heat dissipation along the fibre axis, is proposed MH - United Kingdom MH - Mexico|Queretaro MH - Peoples R China PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 38 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000085952800017 SO - Applied Physics A-Materials Science & Processing 2000 ;70(2):231-233 969 UI - 15996 AU - Huberman A AU - Aguilar MB AU - Navarro-Quiroga I AU - Ramos L AU - Fernandez I AU - White FM AU - Hunt DF AD - Inst Nacl Nutr Salvador Zubiran, Dept Biochem, Mexico City 14000, DF, MexicoUniv La Habana, Ctr Invest Marinas, Ciudad Habana, CubaUniv Virginia, Dept Chem, Biol Mass Spectrometry Lab, Charlottesville, VA 22901, USAUniv Virginia, Dept Pathol, Charlottesville, VA 22901, USAHuberman, A, Inst Nacl Nutr Salvador Zubiran, Dept Biochem, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - A hyperglycemic peptide hormone from the Caribbean shrimp Penaeus (litopenaeus) schmitti AB - From a crude extract of the sinus glands of the shrimp Penaeus (litopenaeus) schmitti a peptide with hyperglycemic activity in a homologous bioassay was isolated and characterized by a combination of automatic Edman degradation, enzymatic digestions, TLC of dansyl-amino acids, and mass spectrometry. Its M-r is 8359.4 Da by MS, which coincides with the deduced sequence. Its N-terminus is free and its C-terminus is amidated. It has 6 Cys residues in conserved positions compared with other known CHI-Is. This is the first sinus gland hormone from an Atlantic Ocean shrimp characterized to date. It has a remarkable 90% sequence similarity to the Indo-Pacific shrimp P. (marsupenaeus) japonicus Pej-VII hyperglycemic hormone. (C) 2000 Elsevier Science Inc. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0196-9781 UR - ISI:000086995900002 L2 - sinus gland;shrimp;hyperglycemic hormone;CHH;Penaeus;western Atlantic;evolution;AMINO-ACID-SEQUENCE; PROCAMBARUS-BOUVIERI ORTMANN; LOBSTER HOMARUS-AMERICANUS; SINUS GLAND; CRUSTACEAN; CHH; CRAYFISH; NEUROPEPTIDE; METABOLISM; PURIFICATION SO - Peptides 2000 ;21(3):331-338 970 UI - 14346 AU - Huddleston DE AU - Strangeway RJ AU - Blanco-Cano X AU - Russell CT AU - Kivelson MG AU - Khurana KK AD - Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USAUNAM, Inst Geofis, Mexico City 04510, DF, MexicoHuddleston, DE, Hughes Space & Commun, El Segundo, CA 90245, USA TI - IO-Jupiter interaction: Waves generated by pickup ions AB - Ion pickup processes invariably produce anisotropic ion distributions and hence can give rise to wave generation. This paper discusses the waves due to the Io pickup source in Jupiter's magnetosphere. In the near-Io torus, the Galileo spacecraft observed ion cyclotron waves near the sulfur dioxide gyrofrequency, which grow due to the absence of a thermalized background component of these molecular ions in a torus plasma of predominantly dissociated species. These wave observations allow limits on pickup source rates to be estimated. On the edge of the Io wake, mirror mode waves were seen where the pickup ion contribution to the pressure anisotropy is sufficient to overcome the instability threshold. The mirror mode can dominate over the individual ion cyclotron modes in a multi-species plasma. The mass density in the torus cannot increase indefinitely and the plasma must be radially transported through the Jovian magnetosphere. Wave processes may be associated with any ion distribution anisotropies that arise during their radial transport, and with unsteady reconnection processes that may facilitate their eventual loss from the magnetotail. (C) 2000 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000166724300007 L2 - CYCLOTRON WAVES; PLASMA OBSERVATIONS; MAGNETIC-FIELD; FREE-ENERGY; SOLAR-WIND; TORUS; DISPERSION; ENCOUNTER SO - Planetary Ionospheres and Magnetospheres 2000 ;26(10):1513-1518 971 UI - 15558 AU - Huerta-Gonzalez L AU - Wilby RA AD - Univ Reading, Dept Food Sci & Technol, Reading RG6 6AP, Berks, EnglandIPN, CICATA, Puebla 72160, MexicoWilby, RA, Univ Reading, Dept Food Sci & Technol, Reading RG6 6AP, Berks, England TI - Comparison of a laboratory butter reworker with a Westfalia industrial reworker AB - Bulk butter was subjected to reworking by an industrial and a small-scale reworker. Samples were examined by, visco-elastic rheometry in oscillatory mode. The shift in storage modulus on reworking,vas estimated and compared to the total applied shear (TAS) in the reworking operations. nle relationship between TAS and rheological changes was similar for the two reworking systems, providing both a confirmation of the applicability, of the laboratory reworker for examining butter reworking ann the potential for modification of butters in the reworking process MH - United Kingdom MH - Mexico|Puebla PB - HUNTINGDON CAMBS: SOC DAIRY TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1364-727X UR - ISI:000088479500010 SO - International Journal of Dairy Technology 2000 ;53(2):75-77 972 UI - 14826 AU - Huerta A AU - Pizio O AU - Bryk P AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUAEMex, Fac Ciencias, Toluca 50000, MexicoBryk, P, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Application of the density functional method to study phase transitions in an associating Lennard-Jones fluid adsorbed in energetically heterogeneous slit-like pores AB - A density functional approach is used to study the adsorption of the four-bonding-site model associating Lennard-Jones fluid in slit-like pores with energetically heterogeneous walls. The fluid-wall potential is qualitatively similar to that invoked by Rocken, P., Somoza, A., Tarazona, P., and Findenegg, G. H., 1999, J. chem. Phys., 108, 8089, i.e. it consists of a homogeneous part that varies in the direction perpendicular to the wall and a periodic part, varying also in one direction parallel to the wall. Both parts are modelled by Lennard-Jones 9,3-type functions. The structure of the adsorbed film is characterized by the local densities of all particles and the densities of the monomers. The phase diagrams are evaluated for several systems characterized by different corrugation of the adsorbing potential. The adsorbing field is strong enough to allow for the layering transition. As well as the formation of the so-called bridge phase that fills the pore space over the most energetic parts of the wall and of capillary condensation, the layering transition is observed within the first layer adjacent to the pore walls. If the adsorbing potential due to each pore wall is shifted in phase by pi /2, the bridge phase is not formed MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Poland PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 10 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000165381100002 L2 - DIRECTIONAL ATTRACTIVE FORCES; RANDOM QUENCHED IMPURITIES; 4 BONDING SITES; MONTE-CARLO; CAPILLARY CONDENSATION; SOLID-SURFACES; HARD-SPHERES; ADSORPTION; FILMS; SIMULATIONS SO - Molecular Physics 2000 ;98(22):1859-1869 973 UI - 16465 AU - Huerta A AU - Pizio O AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandHuerta, A, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Phase transitions in an associating, network-forming, Lennard-Jones fluid in slit-like pores. II. Extension of the density functional method AB - We study adsorption of hydrogen-bonded fluids in slit-like pores with strongly attractive walls, in the framework of the four-site associating Lennard-Jones model. The density profiles, as well as the phase behavior, are obtained by using a density functional method. We have found that, at temperatures lower than the critical temperature of the bulk fluid, the confined fluid undergoes one or more layering transitions dependent on the pore width, followed by capillary condensation. Each of the transitions is localized by analyzing the grand thermodynamic potential. The density profiles of nonbonded and differently bonded particles demonstrating changes of the structure of the fluid in the pore along the coexistence are discussed briefly. The critical temperature for capillary condensation is lower for confined fluid, compared with that for the bulk liquid-vapor transition, as expected. However, an increase of the energy of association between fluid species increases the critical temperatures for layering transitions and for capillary condensation. The envelope of the capillary condensation is narrower than the bulk liquid-vapor phase diagram. The ratio between the critical temperatures for layering transitions and capillary condensation depends on the pore width. The critical temperature for the second layering is always lower than for the first one. The triple point temperature between either the second layering transition and the capillary condensation (in wider pores) or the first layering transition and the capillary condensation (in narrower pores) increases with decreasing pore width. The triple point temperature between the layering transitions is much lower than the relevant temperature between the second layering transition and the capillary condensation. The triple point temperatures also depend on the association energy. We have shown that highly bonded fluid species prevail at triple point temperatures. (C) 2000 American Institute of Physics. [S0021-9606(00)52005-4] MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 21 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000085455600043 L2 - DIRECTIONAL ATTRACTIVE FORCES; 4 BONDING SITES; HARD-WALL; CAPILLARY CONDENSATION; MONTE-CARLO; EQUATION; EQUILIBRIA; STATE; MODEL; SIMULATION SO - Journal of Chemical Physics 2000 ;112(9):4286-4295 974 UI - 16198 AU - Huerta G AU - West M AD - Duke Univ, Durham, NC 27706, USAHuerta, G, Ctr Invest Matemat, Callejon Jalisco S-N,Mineral Valenciana,Apartado, Guanajuato 36240, Mexico TI - Priors and component structures in autoregressive time series models (vol 61, pg 881, 1999) MH - Mexico|Guanajuato MH - USA PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Correction AV - English IS - 1369-7412 UR - ISI:000086433600014 SO - Journal of the Royal Statistical Society Series B-Statistical Methodology 2000 ;62():429-429 975 UI - 15514 AU - Huerta R AU - Dewailly D AU - Decanter C AU - Knochenhauer ES AU - Boots LR AU - Azziz R AD - Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, Birmingham, AL 35294, USAUniv Alabama, Dept Obstet & Gynecol, Birmingham, AL 35294, USAUniv Alabama, Dept Med, Birmingham, AL 35294, USAUniv Guanajuato, Inst Invest Med, Leon, MexicoCtr Hosp Reg & Univ Lille, Clin Marc Linquette, Dept Endocrinol & Diabet, F-59037 Lille, FranceAzziz, R, Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, 618 S 20th St,OHB 549, Birmingham, AL 35294 USA TI - Adrenocortical hyperresponsivity to adrenocorticotropic hormone: a mechanism favoring the normal production of cortisol in 21-hydroxylase-deficient nonclassic adrenal hyperplasia AB - Objective: To test the hypothesis that patients with nonclassic adrenal hyperplasia (NCAH) exhibit a generalized exaggeration in their response to ACTH stimulation that favors the normal production of F. patients with 21-hydroxylase (21-OH)-deficient NCAH do not demonstrate cortisol (F) deficiency. Design: prospective controlled study. Setting: Tertiary university clinic. Patient(s): Twenty-four untreated patients with NCAH diagnosed by a 17 alpha-hydroxyprogesterone (17-HP) level of >30.3 nmol/L (>10 ng/mL), and 37 age- and body mass-matched healthy eumenorrheic nonhirsute controls. Intervention(s): All study subjects underwent a 60 minute acute stimulation using 0.25 mg of ACTH-(1-24) i.v. Main Outcome Measure(s): Basal and stimulated serum levels of pregnenolone (PREG), 17-hydroxypregnenolone (17-HPREG), dehydroepiandrosterone (DHA), progesterone (P4), 17-HP, androstenedione (A4), 11-deoxycortisol (S), and cortisol (F). Result(s): The median basal (i.e., Steroid(0)) or ACTH-stimulated (i.e., Steroid(60)) serum levels of PREG, 17-HPREG, DHA, P4, 17-HP, A4 and, most importantly, S were higher in NCAH patients than in controls. In contrast, the levels of F at either 0 minute or 60 minutes of stimulation were similar between NCAH and control women. The proportion of NCAH patients with stimulated steroids levels of >the 95th percentile of controls were as follows: 84.21% for PREG(60), 87.5% for 17-HPREG(60), 95.8% for DHA(60), 89.5% for P4(60), 100% for 17-HP60, 91.7% for A4(60), 29.2% for S-60, and 4.1% for F-60. Conclusion(s): A generalized adrenocortical hyperresponsivity to ACTH stimulation seems to be present in patients with 21-OH-deficient NCAH, with an exaggerated production of S evident in approximately 30%. The excess production of S in these NCAH patients may, in part, account fur their normal F production. (C)2000 by American Society for Reproductive Medicine MH - USA MH - France MH - Mexico|Guanajuato PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000088595000022 L2 - adrenal hyperplasia;21-hydroxylase;excess androgens;cortisol;adrenal;hirsutism;HYPERANDROGENIC WOMEN; ANDROGEN EXCESS; DEFICIENCY; MUTATIONS; STIMULATION; P450C21; RESPONSES; ACTH SO - Fertility and Sterility 2000 ;74(2):329-334 976 UI - 15391 AU - Hughes DH AU - Kukula MJ AU - Dunlop JS AU - Boroson T AD - Univ Edinburgh, Dept Phys & Astron, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandNatl Opt Astron Observ, Tucson, AZ 85726, USAHughes, DH, INAOE, Apartado Postal 51 & 216, Puebla 7200, Mexico TI - Optical off-nuclear spectra of quasar hosts and radio galaxies AB - We present optical (similar to 3200 to similar to 9000 Angstrom) off-nuclear spectra of 26 powerful active galaxies in the redshift range 0.1 less than or equal to z less than or equal to 0.3, obtained with the Mayall and William Herschel 4-m class telescopes. The sample consists of radio-quiet quasars, radio-loud quasars (All with -23 greater than or equal to M-V greater than or equal to -26) and radio galaxies of Fanaroff-Riley Type II (with extended radio luminosities and spectral indices comparable to these of the radio-loud quasars). The spectra were all taken approximately 5 arcsec off-nucleus, with offsets carefully selected so as to maximize the amount of galaxy light falling into the slit, whilst simultaneously minimizing the amount of scattered nuclear light. The majority of the resulting spectra appear to be dominated by the integrated stellar continuum of the underlying Salaries rather than by light from the non-stellar processes occurring in the active nuclei, and in many cases a 4000-Angstrom break feature can be identified. The individual spectra are described in detail, and the importance of the various spectral components is discussed. Stellar population synthesis modelling of the spect ra will follow in a subsequent paper MH - Mexico|Puebla MH - United Kingdom MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000088808200023 L2 - galaxies : active;quasars : general;galaxies : stellar content;NEARBY LUMINOUS QUASARS; SPACE-TELESCOPE IMAGES; QUIET QUASARS; REDSHIFT QUASARS; STELLAR OBJECTS; LOUD QUASARS; QSOS; SPECTROSCOPY; NEBULOSITY; EVOLUTION SO - Monthly Notices of the Royal Astronomical Society 2000 ;316(1):204-224 977 UI - 16388 AU - Hughes MF AU - Del Razo LM AU - Kenyon EM AD - US EPA, Nat Hlth & Environm Effects Res Lab, Expt Toxicol Div, Res Triangle Pk, NC 27711, USAInst Politecn Nacl, CINVESTAV, Dept Farmacol & Toxicol, Secc Toxicol Ambiental, Mexico City 07000, DF, MexicoHughes, MF, US EPA, Nat Hlth & Environm Effects Res Lab, Expt Toxicol Div, MD-74, Res Triangle Pk, NC 27711 USA TI - Dose-dependent effects on tissue distribution and metabolism of dimethylarsinic acid in the mouse after intravenous administration AB - Most mammals methylate inorganic arsenic to dimethylarsinic acid (DMA). This organic arsenical causes organ-specific toxicity and is a multi-organ tumor promoter. The objective of this study was to examine whether dose could affect the distribution and metabolism of DMA. Female B6C3F1 mice (3-4/time point) were administered 1.11 or 111 mg/kg of DMA (1 mu Ci of [C-14] or unlabeled) intravenously and killed serially (5-480 min). Blood was separated into plasma and red blood cell fractions and liver, kidney and lung were removed, weighed and homogenized. Tissue samples were oxidized and analyzed for DMA-derived radioactivity. Blood and several organs of the non-radioactive DMA-treated animals were digested in acid and analyzed by hydride generation atomic absorption spectrophotometry for DMA and metabolites. Concentration-time profiles showed a biexponential decrease of DMA-derived radioactivity in all tissues examined. Kidney had the highest concentration (1-20% dose/gm) of radioactivity of all tissues up to 60 min post-administration. Concentration of radioactivity was greater in plasma than red blood cells at 5 and 15 min and then was similar for the remaining time points. A dose-dependent effect on the concentration of radioactivity was observed in the lung. The retention of radioactivity in the lung was altered compared with liver and kidney, with a much longer t(1/2 beta) and a disproportionate increase in area under the curve with increased dose. No methylated or demethylated products of DMA were detected in blood or any organ up to 8 h post-exposure. The dose-dependent distribution of DMA in the lung may have a role in the toxic effects DMA elicits in this organ. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 26 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0300-483X UR - ISI:000085718700003 L2 - dimethylarsinic acid;pharmacokinetics;arsenic;DNA-STRAND BREAKS; INORGANIC ARSENICS; RESPIRATORY CANCER; CACODYLIC ACID; MICE; EXPOSURE; RATS; ARSENATE; BIOTRANSFORMATION; EXCRETION SO - Toxicology 2000 ;143(2):155-166 978 UI - 16335 AU - Hughes RF AU - Kauffman JB AU - Jaramillo VJ AD - Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331, USAOregon State Univ, Dept Wildlife & Fisheries, Corvallis, OR 97331, USAUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recuros Nat, Morelia 58089, Michoacan, MexicoHughes, RF, Univ Colorado, Cooperat Inst Res Environm Sci, Campus Box 216, Boulder, CO 80309 USA TI - Ecosystem-scale impacts of deforestation and land use in a humid tropical region of Mexico AB - Deforestation of tropical evergreen forests is a major contributor to increasing levels of greenhouse gases in the atmosphere. However, large uncertainties currently exist concerning the quantities of C and other elements lost to the atmosphere due to the conversion of primary forests to pastures and agricultural lands. Elemental losses associated with land conversion in the heavily deforested Los Tuxtlas Region of Mexico were quantified. Total aboveground biomass (TAGB) as well as carbon and nutrient pools in aboveground vegetation and soils were measured along a land-use gradient that included primary forests as well as pastures and cornfields, which represent the dominant land-use types in the region. TAGB of primary forests in the Los Tuxtlas Region averaged 403 Mg/ha; pasture and cornfield sites averaged 24 and 23 Mg/ha, respectively. Approximately 80% of TAGB of forests was composed of trees >30 cm in diameter at breast height (dbh), while trees >70 cm dbh accounted for 44% of TAGB. Conversion of forests to pastures or cornfields resulted in declines of 95% of aboveground C pools, 91% of aboveground N pools, 83% of aboveground P pools, and 89-95% of aboveground S pools in sites ranging in age from 3 to 45 years since deforestation. In contrast to aboveground pools, soil pools of C, N, and S to a 1 m depth were highly variable and did not show detectable declines in pasture and cornfield sites compared to forest sites, nor did they decline with increasing periods of land use. Average C mass in soils of forest, pasture, and cornfield sites rang ed between 166 and 210 Mg/ha; mass of N and S in soils ranged from 16 to 20 and from similar to 3 to 4 Mg/ha, respectively. Approximately 50% of the combined aboveground and soil pools of C were lost as a result of deforestation and land use. Because the vast majority (>90%) of N and S pools were present in the relatively stable pools of these young volcanic soils, less than 10% of combined aboveground and soil N and S pools were lost due to land-use change in the Los Tuxtlas Region MH - USA MH - Mexico|Michoacan PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 21 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 1051-0761 UR - ISI:000086008300017 L2 - aboveground biomass;carbon and nutrient pools;deforestation and land use;forest conversion;greenhouse gas flux;Los Tuxtlas, Mexico;mature forests, pastures, and cornfields;N, S, and P dynamics, aboveground vs. soils;tropical evergreen forests;FLORISTIC COMPOSITION; BRAZILIAN AMAZON; EASTERN AMAZONIA; NUTRIENT POOLS; LOS-TUXTLAS; CARBON; FORESTS; BIOMASS; PASTURES; SOILS SO - Ecological Applications 2000 ;10(2):515-527 979 UI - 15051 AU - Huilgol RR AU - Mena B AD - Flinders Univ S Australia, Sch Informat & Engn, Adelaide, SA 5001, AustraliaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoHuilgol, RR, Flinders Univ S Australia, Sch Informat & Engn, GPO Box 2100, Adelaide, SA 5001, Australia TI - On the time estimate for start-up of pipe flows in a Bingham fluid - a proof of the result due to Glowinski, Lions and Tremolieres AB - A proof of the result due to Glowinski, Lions and Tremolieres on the time estimate for start-up of pipe flows in a Bingham fluid is presented. This result states that the norm of the unsteady flow approaches that of the steady flow exponentially, with the density and viscosity of the fluid, and the lowest eigenvalue of the Laplacian over the cross-section of the pipe playing significant roles. (C) 2000 Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Mechanics U5 - J;Article AV - English IS - 0377-0257 UR - ISI:000089924500003 L2 - Bingham fluid;pipe flow;variational inequality;time estimate SO - Journal of Non-Newtonian Fluid Mechanics 2000 ;94(2-3):113-118 980 UI - 15703 AU - Hulek K AU - Nieto I AU - Sankaran GK AD - Univ Hannover, Inst Math, D-30060 Hannover, GermanyCimat AC, Guanajuato 36000, MexicoUniv Bath, Dept Math Sci, Bath BA2 7AY, Avon, EnglandHulek, K, Univ Hannover, Inst Math, Postfach 6009, D-30060 Hannover, Germany TI - Heisenberg-invariant Kummer surfaces AB - We study, from the point of view of abelian and Kummer surfaces and their moduli, the special quintic threefold known as Nieto's quintic. It is, in some ways, analogous to the Segre cubic and the Burkhardt quartic and can be interpreted as a moduli space of certain Kummer surfaces. It contains 30 planes and has 10 singular points: we describe how some of these arise from bielliptic and product abelian surfaces and their Kummer surfaces MH - United Kingdom MH - Germany MH - Mexico|Guanajuato PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0013-0915 UR - ISI:000088030700013 L2 - abelian surface;Kummer surface;moduli;classical algebraic geometry SO - Proceedings of the Edinburgh Mathematical Society 2000 ;43():425-439 981 UI - 16492 AU - Hurtado-Ramos JB AU - Stavroudis ON AU - Wang HM AU - Gomez-Rosas G AD - Ctr Invest Opt AC, Leon 37150, Gto, MexicoKLA Tencor Instruments, Film Measurement Div, Milpitas, CA 95035, USAHurtado-Ramos, JB, Ctr Invest Opt AC, Loma Bosque 115, Leon 37150, Gto, Mexico TI - Scattering loss measurements of evaporated slab waveguides of SiO2 and NdF3 using a prism coupler and angle-limited integrated scattering AB - A method for finding the attenuation coefficient of a planar or channel waveguide is described. Results for SiO2 and NdF3 waveguides were obtained, showing that the latter presents better attenuation characteristics. The influence of the prism shape on the measurements was also tested and found to result in variations in the measured attenuation coefficient. Two different locations of the waveguides were selected for the coupling, and again variations occurred. suggesting irregular thickness of the thin films. The method uses concepts based on the angle-limited integrated scattering technique and also on the well-known prism coupling method. It may be possible to make the system fully automatic. (C) 2000 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)03102-0] MH - Mexico|Guanajuato MH - USA PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000085384500029 L2 - waveguides;scattering;prisms;OPTICAL WAVE-GUIDES SO - Optical Engineering 2000 ;39(2):558-564 982 UI - 14693 AU - Huttemeister S AU - Aalto S AU - Das M AU - Wall WF AD - Univ Bonn, Inst Radioastron, D-53121 Bonn, GermanyOnsala Space Observ, S-43992 Onsala, SwedenIndian Inst Astrophys, Bangalore 560034, Karnataka, IndiaUniv Maryland, Dept Astron, College Pk, MD 20742, USAINAOE, Puebla 72000, MexicoHuttemeister, S, Univ Bonn, Inst Radioastron, Hugel 71, D-53121 Bonn, Germany TI - Changing molecular gas properties in the bar and center of NGC 7479 AB - We present sensitive interferometric (CO)-C-12, (CO)-C-13 and HCN observations of the barred spiral galaxy NGC 7479, one of the few barred galaxies known to have a continuous gas-filled bar. We focus on the investigation and interpretation of (CO)-C-12/(CO)-C-13 line intensity ratios R-12/13, which is facilitated by having more than 90% of the flux in our interferometer maps. The global (9 kpc by 2.5 kpc) value of R12/13 is high at 20-40. On smaller scales (similar to 750 PC), R12/13 is found to vary dramatically, reaching values > 30 in large parts of the bar, but dropping to values similar to 5, typical for galactic disks, at a (CO)-C-13 condensation in the southern part of the bar. We interpret these changes in terms of the relative importance of the contribution of a; diffuse molecular component, characterized by unbound gas that has a moderate optical depth in the (CO)-C-12(1-->0) transition. This component dominates the (CO)-C-12 along the bar and is also likely to play an important role in the center of NGC 7479. In the center, the (CO)-C-12 and the HCN intensity peaks coincide, while the (CO)-C-13 peak is slightly offset. This can be explained in terms of high gas temperature at the (CO)-C-12 peak position. Along the bar, the relation between the distribution of (CO)-C-12, (CO)-C-13, dust lanes and velocity gradient is complex. A southern (CO)-C-13 condensation is found offset from the (CO)-C-12 ridge that generally coincides with the most prominent dust lanes. It is possible that strong (CO)-C-13 detections along the bar indicate quiescent conditions, downstream from the major bar shock. Still, these condensations are found close to high velocity gradients. In the central region, the velocity gradient is traced much more closely by (CO)-C-13 than by (CO)-C-12 MH - Germany MH - India MH - Mexico|Puebla MH - Sweden MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000165873600013 L2 - galaxies : individual : NGC 7479;galaxies : ISM;galaxies : starburst;radio lines : galaxies;SPIRAL GALAXIES; CO OBSERVATIONS; INTERSTELLAR-MEDIUM; IC 342; KINEMATICS; NGC-7479; MERGERS; CLOUDS; EMISSION; EXCITATION SO - Astronomy and Astrophysics 2000 ;363(1):93-107 983 UI - 15170 AU - ias-Ordonez R AD - Lehigh Univ, Bethlehem, PA, USAMacias-Ordonez, R, Inst Ecol Xalapa, Dept Ecol & Anim Behav, Veracruz, Mexico TI - Touchy harvestmen MH - Mexico|Veracruz MH - USA PB - NEW YORK: AMER MUSEUM NAT HISTORY RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0028-0712 UR - ISI:000089485400016 SO - Natural History 2000 ;109(8):58-67 984 UI - 16645 AU - ias-Salinas R AU - Fair JR AD - Univ Texas, Dept Chem Engn, Separat Res Program, Austin, TX 78712, USAMacias-Salinas, R, Inst Politecn Nacl, ESIQIE, UPALM, Mexico City 07738, DF, Mexico TI - Axial mixing in modern packings, gas, and liquid phases: II. Two-phase flow AB - Axial mixing measurements of air and water under two-phase flow conditions were made in a large-scale packed column (0.43 m diameter) using tracer experiments. Part I of this article dealt with single-phase mixing in the same column, with the same internals. Four packings were studied: 25.4-mm ceramic Raschig rings, 25.4-mm metal Pall rings, Sulzer BX structured packing, and Flexipac 2 structured packing. Air and water flowed countercurrently through the column at atmospheric pressure and at gas rates varying from 0.25 kg/m(2).s up to the flooding point and liquid rates from 3.25 to 8.5 kg/m(2).s. A diffusion-type model served to reproduce the experimental response curves obtained for both phases. The results confirmed previous observations for first-generation packings: axial mixing in the gas increases with both gas and liquid rates, whereas liquid-phase axial mixing is a decreasing function of liquid rate and is insensitive to gas rate up to the flooding point. It was also found that the BX packing produces the least mixing in both phases. The largest mixing effects in the gas phase are found for the Raschig rings, and the largest mixing effects for the liquid phase are found for Flexipac 2. Correlations were developed to reproduce the results, yielding an average +/- 22% difference between experimental and correlated data MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0001-1541 UR - ISI:000084886200010 L2 - PULSED PACKED-COLUMN; ABSORPTION COLUMNS; STRUCTURED PACKING; 2-PHASE FLOW; DISPERSION SO - Aiche Journal 2000 ;46(1):79-91 985 UI - 15125 AU - ias-Samano JE AU - Borden JH AD - Simon Fraser Univ, Ctr Environm Biol, Dept Biol Sci, Burnaby, BC V5A 1S6, CanadaMacias-Samano, JE, El Colegio Frontera Sur, ECOSUR, Tapachula 30700, Chiapas, Mexico TI - Interactions between Scolytus ventralis and Pityokteines elegans (Coleoptera : Scolytidae) in Abies grandis AB - When standing and fallen grand firs, Abies grandis (Douglas ex D. Don) Lindley, were co-attacked by fir engravers, Scolytus ventralis LeConte, and Pityokteines elegans (Swaine), 5.8% of galleries of the latter species were initialed from galleries of the former. Larval S. ventralis avoided contact with both con- and heterospecific galleries, whereas P. elegans adult and larval galleries freely crossed those of S. ventralis. There were strong and weak negative relationships for gallery establishment and emergence, respectively, between the 2 species, but numerous instances in which both species cc-inhabited the same resource. Unlike many scolytids, the 2 species did not partition the host according to the diameter of the bole. The results indicate a moderate level of competitive interaction between the 2 species in which P. elegans would either colonize all area of bark before S. ventralis, which would then not initiate attack, or in which both species would co-attack a host, but S. ventralis would avoid phloem colonized by P. elegans MH - Canada MH - Mexico|Chiapas PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000089623000005 L2 - Scolytus ventralis;Pityokteines elegans;competition;DRYOCOETES-AFFABER COLEOPTERA; DENDROCTONUS-RUFIPENNIS; LODGEPOLE PINE; IPS-PARACONFUSUS; FIR ENGRAVER; BARK BEETLES; PHEROMONES; COMPETITION; ATTRACTION; DYNAMICS SO - Environmental Entomology 2000 ;29(1):28-34 986 UI - 15230 AU - Ibarra AA AU - Reid C AU - Thorpe A AD - Univ Toulouse 1, Ecole Doctoral Sci Sociales, F-31000 Toulouse, FranceUniv Portsmouth, Dept Econ, Portsmouth PO4 8JF, Hants, EnglandInst Nacl Pesca, Mexico City, DF, MexicoThorpe, A, Univ Portsmouth, Dept Econ, Locksway Rd, Portsmouth PO4 8JF, Hants, England TI - Neo-liberalism and its impact on overfishing and overcapitalisation in the marine fisheries of Chile, Mexico and Peru AB - The linkages between neo-liberalism and the fisheries sector in three of Latin America's principal fishing nations are examined. The paper shows how macroeconomic policies have not only re-inforced the sector's traditional export orientation but also permitted increased private participation in harvesting and processing. Production and export growth was facilitated by the absence of an effective regulatory framework as the belief that fish stocks were plenteous (following the designation of 200 mile Economic Exclusion Zones in the 1970s) encouraged governments to permit open access fisheries regimes. The belated recognition that there were indeed 'limits to growth' spawned a series of fisheries laws in the early-1990s which have sought to re-regulate the sector. To date these efforts have been largely unsuccessful and the principal regional fisheries are presently both overcapitalised and dangerously overfished, (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Agricultural Economics & Policy;Economics;Food Science & Technology;Nutrition & Dietetics U5 - J;Article NT - DUPLICATE AV - English IS - 0306-9192 UR - ISI:000089338800003 L2 - LATIN-AMERICA; TAX-REFORM; SUSTAINABILITY; POLITICS; EXPORTS SO - Food Policy 2000 ;25(5):599-622 987 UI - 14817 AU - Ibarra J AU - Varez A AU - Leon C AU - Santamaria J AU - Torres-Martinez LM AU - Sanz J AD - Univ Carlos III Madrid, Dept Mat, Leganes 28911, SpainUniv Complutense Madrid, Fac Fis, Dept Fis Aplicada, E-28040 Madrid, SpainUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey 64570, MexicoCSIC, Inst Ciencia Mat, Cantoblanco 28049, SpainVarez, A, Univ Carlos III Madrid, Dept Mat, Avda Univ 30, Leganes 28911, Spain TI - Influence of composition on the structure and conductivity of the fast ionic conductors La2/3-xLi3xTiO3 (0.03 <= x <= 0.167) AB - The solid solution La2/3-xLi3xTiO3 (0.03 < x < 0.167) has been investigated by powder X-ray diffraction (XRD), impedance spectroscopy (IS) and Li-7 nuclear magnetic resonance (NMR) techniques. In these samples, a change of symmetry from tetragonal to orthorhombic is observed when the lithium content is decreased below x = 0.06. Structural modifications produced are mainly due to cation vacancies ordering along the c-axis, which disappear gradually when the Li content increases. Two Li signals with different quadrupole constants are detected in Li-7 NMR spectra of orthorhombic/tetragonal perovskites, which have been associated with two crystallographic sites. In La0.5Li0.5TiO3 perovskite, prepared by quenching from 1300 degreesC into liquid nitrogen, an important mobility for Li was detected in Li-7 NMR spectra. In perovskites analysed, the dependence of electrical conductivity on Li content departs from that expected on the basis of a random distribution of La and Li in A sites. Dc conductivity increases quickly with the Li content in orthorhombic samples, hut changes much more smoothly in tetragonal ones, where vacancies distribution becomes progressively disordered. In all perovskites analysed, the dependence of de-conductivity with temperature displays a non-Arrhenius behaviour, with activation energies of 0.39+/-0.02 and 0.29+/-0.02 eV in 160-250 and 250-360 K temperature ranges respectively. (C) 2000 Elsevier Science BV. All rights reserved MH - Mexico|Nuevo Leon MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 48 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0167-2738 UR - ISI:000165476200002 L2 - Li-7 NMR;ionic conductivity;perovskite structure;lithium mobility;SOLID-SOLUTION LA0.67-XLI3XTIO3; NUCLEAR-MAGNETIC-RESONANCE; A-SITE IONS; LITHIUM; LI0.5LA0.5TIO3; PEROVSKITES; RELAXATION SO - Solid State Ionics 2000 ;134(3-4):219-228 988 UI - 13718 AU - Inoue MB AU - Munoz IC AU - Machi L AU - Inoue M AU - Fernando Q AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoInoue, MB, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - Structural and spectroscopic studies of binuclear Cu2+ and Co2+ complexes with an amide-based naphthalenophane AB - Binuclear Cu2+ and Co2+ complexes with a chelating naphthalenophane were characterized by single-crystal X- ray analyses, electronic absorption spectroscopy and luminescence spectroscopy: the naphthalenophane is 2,9,22,29-tetraoxo-4,7,24,27-tetrakis( carboxymethyl)-1,4,7,10,21,24,27,30-octaaza[10.10](1.5)naphthalenophane (abbreviated as LH4). The Cu2+ complex crystallized as [Cu2L](0) From acidic solution and [Cu-2(LH-4)](4-) from basic solution: the coordination geometry around each metal ion in [Cu2L](0) is a square pyramid with an amide oxygen atom, two amino nitrogen atoms and two carboxylate oxygen atoms; the amide nitrogen atoms in [Cu-2(LH-4)](4-) are deprotonated and construct a square planar coordination geometry together with amino nitrogen atoms around each metal ion. The formation of the two structures is due to a change in the coordination linkage of the amide groups. [Cu-2(LH (-4))](4-) shows strong metal-ligand charge transfer bands caused by the coordination of the amide nitrogen atoms that are directly bonded to the naphthyl groups. In the Co2+ complex. [CO2L(H2O)(2)](0), each metal ion has a seven-coordination geometry. the emission and excitation bands in the luminescence spectra showed a red shift upon metal complexation. In all metal complexes studied. the naphthyl groups are distorted from the planar structure. as a result of metal complexation that causes contraction of the macrocyclic rings. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000168593300008 L2 - Cu2+ complexes;Co2+ complexes;macrocyclic metal complexes;X-ray structures;luminescence spectra;FLUORESCENCE EMISSION; ZN2+ SO - Inorganica Chimica Acta 2000 ;311(1-2):50-56 989 UI - 15901 AU - Inoue MB AU - Munoz IC AU - Inoue M AU - Fernando Q AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoInoue, MB, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - X-ray structures and fluorescence spectra of binuclear Zn2+ and Cd2+ complexes of an amide-based naphthalenophane AB - The formation of binuclear Zn2+ and Cd2+ complexes with an amide-based chelating naphthalenophane has been confirmed by X-ray crystal analyses: the complexes are formulated as [(H2O)MLM(OH2)](0) (M = Zn or Cd), and the naphthalenophane, LH4, is 2,9,22,29-tetraoxo-4,7,24,27-tetrakis(carboxymethyl)-1,4,7,10,21,24,27,3 0-octaaza[10.10](1,5)naphthalenophane. The Zn2+ complex has a six-coordination geometry and the Cd2+ complex has a seven-coordination geometry. The naphthyl groups are deformed from the planar structure by metal complexation in both complexes. Fluorescence from the uncoordinated ligand is weakened by protonation. The coordination of Zn2+ enhances the fluorescence whereas the coordination of Cd2+ weakens the emission: the intensity ratio, F(L):F(Zn2L):F(Cd2L) = 1:12:0.2 at pH 10. The Zn2+ complex exhibits a large change in the fluorescence intensity with pH, as a result of interconversion between [(H2O)ZnLZn(OH2)](0) and [(HO)ZnLZn(OH)](2-); the emission of the latter formed at higher pH is 20 times stronger than that of the former formed at lower pH. Structural changes that occur in the chelating units upon protonation or metal complexation propagate to the fluorescent units through the amide groups that link the two functional units. This propagation results in the fluorescence properties characteristic of the amide-based naphthalenophane. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000087422800027 L2 - X-ray structures;fluorescence spectra;macrocyclic metal complexes;cadmium complexes;zinc complexes;METAL-COMPLEXES; MACROCYCLES; H-1-NMR; CONSTANTS; CA2+ SO - Inorganica Chimica Acta 2000 ;300():206-211 990 UI - 15501 AU - Iracheta MM AU - Pereyra-Alferez B AU - Galan-Wong L AU - Ferre J AD - Univ Valencia, Fac CC Biol, Dept Genet, E-46100 Valencia, SpainUANL, Fac Ciencias Biol, Dept Microbiol & Inmunol, Monterrey 66450, NL, MexicoFerre, J, Univ Valencia, Fac CC Biol, Dept Genet, Dr Moliner 50, E-46100 Valencia, Spain TI - Screening for Bacillus thuringiensis crystal proteins active against the cabbage looper, Trichoplusia ni AB - Toxicity tests were performed to find among Cry1 and Cry2 Bacillus thuringiensis crystal proteins those with high activity against the cabbage looper. Tests were performed with neonate larvae on sw face-contaminated artificial diet. The crystal proteins found to be toxic were, from higher to lower toxicity: Cry1Ac, Cry1Ab, Cry1C, Cry2Aa, Cry1J, and Cry1F (LC50 of 1.1-4.1, 3.4-4.4, 12, 34, 87, and 250 ng/cm(2), respectively). Cry1B, Cry1D, and Cry1E can be considered nontoxic (LC,, higher than 2500 ng/cm(2)). Cry1Aa was moderately toxic to nontoxic, depending on the source (LC,, of 420 ng/cm(2) from PGS and 8100 ng/cm(2) from Ecogen). In vitro binding assays with trypsin-activated I-125-labeled Cry1Aa, Cry1Ab, and Cry1Ac crystal proteins and brush border membrane vesicles from midgut larvae showed a direct correlation between toxicity and binding affinity. Heterologous competition experiments indicated that Cry1Aa and Cry1F bind, though only at very high concentrations, to the Cry1Ab/Cry1Ac shared high-affinity binding site. (C) 2000 Academic Press MH - Mexico|Nuevo Leon MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 9 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000088586500011 L2 - Bacillus thuringiensis;Trichoplusia ni;delta-endotoxins;crystal proteins;biological control;cabbage looper;membrane receptors;resistance management;MOTH PLUTELLA-XYLOSTELLA; BRUSH-BORDER MEMBRANE; HELIOTHIS-VIRESCENS; DELTA-ENDOTOXINS; BINDING; LEPIDOPTERA; SPECIFICITY; RESISTANCE; TOXICITY; MIDGUT SO - Journal of Invertebrate Pathology 2000 ;76(1):70-75 991 UI - 16211 AU - Iturriaga G AU - Gaff DF AU - Zentella R AD - UNAM, Inst Biotecnol, Cuernavaca 62210, Morelos, MexicoMonash Univ, Dept Biol Sci, Clayton, Vic 3168, AustraliaIturriaga, G, UNAM, Inst Biotecnol, Av Univ 2001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - New desiccation-tolerant plants, including a grass, in the central highlands of Mexico, accumulate trehalose AB - A grass endemic to Mexico, Sporobolus atrovirens, was identified for the first time as a desiccation-tolerant resurrection plant. Nine species of desiccation-tolerant vascular plants were found in the highland area of Mexico, including four species of ferns (Cheilanthes and Pellaea species) and three species of Selaginella. Two other grasses collected were known desiccation-tolerant species distributed from South America (Cordoba) to North America (Georgia). The ferns Ch. bonariensis, Ch. integerrima, Ch. myriophylla and P. sagittata are newly reported as desiccation-tolerant plants. The osmoprotectant trehalose which has been recorded as rare in plants was found in air-dry foliage of representative species of widely different taxa (9-291 mu M g(-1) dry weight). The flora of desiccation-tolerant species in Mexico is discussed in connection with its ability to accumulate trehalose MH - Australia MH - Mexico|Morelos PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 17 U4 - Plant Sciences U5 - J;Article AV - English IS - 0067-1924 UR - ISI:000086387000002 L2 - SPOROBOLUS-STAPFIANUS; SOUTHERN-AFRICA; WATER-STRESS; LEAVES SO - Australian Journal of Botany 2000 ;48(2):153-158 992 UI - 14753 AU - Ivlev BI AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoIvlev, BI, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USA TI - Control of tunneling by adapted signals AB - The process of quantum tunneling of particles in various physical systems can be effectively controlled even by a weak and slow varying in time electromagnetic signal, especially if to adapt its shape to a particular system. During an under-barrier motion of a particle, such a signal provides a "coherent" assistance of tunneling by the multiquanta absorption resulting in a strong enhancement of the tunneling probability. The semiclassical approach based on trajectories in the complex time is developed for tunneling in a nonstationary field. Enhancement of tunneling occurs when a singularity of the signal coincides in position at the complex time plane with a singularity of the classical Newtonian trajectory of the particle. The developed theory is also applicable to the over-barrier reflection of particles and to reflection of classical waves (electromagnetic, hydrodynamic, etc.) from a spatially-smooth medium MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000165697200012 L2 - COHERENT CONTROL; QUANTUM; DYNAMICS; TIME SO - Physical Review A 2000 ;6206(6): 993 UI - 15063 AU - Izquierdo LY AU - Pinero D AD - Univ Queensland, Sch Land & Food, Brisbane, Qld 4072, AustraliaNatl Autonomous Univ Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoIzquierdo, LY, Univ Queensland, Sch Land & Food, Hartley Teakle Bldg, Brisbane, Qld 4072, Australia TI - High genetic diversity in the only known population of Aechmea tuitensis (Bromeliaceae) AB - Aechmea tuitensis (P. Magaba and E. Lott) is a narrow endemic species from Mexico. Only one population has been reported. We studied the genetic variation and structure, and clonal diversity of this rare bromeliad by using starch gel electrophoresis. Six enzyme systems encoded by nine gene loci were resolved in nine subpopulations. The percentage of polymorphic loci was high (77.8%). Mean expected heterozygosity for the population was 0.12. All loci except CPX-1 were in Hardy-Weinberg equilibrium. Genetic diversity was substantially larger within subpopulations (mean F-is = 0.631) than between them (F-st = 0.196). We detected 33 genetically distinguishable clones from 109 plants (ramets) sampled. One clone had a frequency of 32.1%, others showed frequencies ranging from 1.8 to 9.2%, and 19% of the total samples were unique multilocus genotypes. Aechmea tuitensis exhibits high genetic diversity even though it has an extremely narrow distribution. Our results also suggest that the effect of genetic drift on genetic structure in A. tuitensis might be counteracted by the influence of vegetative reproduction MH - Australia MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0067-1924 UR - ISI:000089937500011 L2 - CLONAL DIVERSITY; ALLOZYME VARIATION; PLANTS; PATTERNS; ASTERACEAE; CYPERACEAE; PROGENITOR; MUTATION; DISTANCE SO - Australian Journal of Botany 2000 ;48(5):645-650 994 UI - 16203 AU - Jacobs J AU - Jimenez LM AU - Malthouse S AU - Chapman E AU - Crothers D AU - Masuk M AU - Jonas WB AD - Univ Washington, Sch Publ Hlth & Community Med, Dept Epidemiol, Seattle, WA 98195, USAUniv Guadalajara, Hlth Sci Ctr, Dept Publ Hlth, Guadalajara, Jalisco, MexicoTribhuvan Univ, Kathmandu, NepalEvergreen Ctr Homeopath Med, Edmonds, WA, USAUniformed Serv Univ Hlth Sci, Dept Family Med, Bethesda, MD 20814, USAJacobs, J, 23200 Edmonds Way,Suite A, Edmonds, WA 98026, USA TI - Homeopathic treatment of acute childhood diarrhea: Results from a clinical trial in Nepal AB - Objective: To investigate whether the finding in a previous study that homeopathic medicines decrease the duration of acute diarrhea in children could be replicated in a different study population. Design: Randomized, double-blind, placebo-controlled trial. Setting: Private, charitable health clinic in Kathmandu, Nepal. Subjects: A consecutive sample of 126 children, 6 months to 5 years of age, who presented during April through June, 1994, with more than three unformed stools in the previous 24 hours. Intervention: Children received either an individualized homeopathic medicine or placebo, to be taken one dose after each unformed stool for 5 days. Parents recorded daily stools on diary cards, and health workers made home visits daily to monitor children. Outcome measures: Predefined measures were based on the previous study: (1) duration of diarrhea, defined as the time until there were fewer than three unformed stools per day, for two consecutive days, and (2) Average number of stools per day for each group. Results: Of the 126 children initially enrolled, 116 completed treatment. The mean number of stools per day over the entire 5-day treatment period was 3.2 for the treatment group and 4.5 for the placebo group (P = 0.023). A Kaplan-Meier survival analysis of the duration of diarrhea, which included data from all patient visits, showed an 18.4% greater probability that a child would be free of diarrhea by day 5 under homeopathic treatment (P = 0.036). Conclusions: These results are consistent with the finding from the previous study that individualized homeopathic treatment decreases the duration of diarrhea and number of stools in children with acute childhood diarrhea MH - Mexico|Jalisco MH - Nepal MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 18 U4 - Integrative & Complementary Medicine U5 - J;Article AV - English IS - 1075-5535 UR - ISI:000086466800005 L2 - DOUBLE-BLIND; NICARAGUA; CHILDREN; THERAPY; PAIN SO - Journal of Alternative and Complementary Medicine 2000 ;6(2):131-139 995 UI - 16066 AU - Jaime-Figueroa S AU - Kurz LJ AU - Liu YZ AU - Cruz R AD - Roche Biosci, Neurobiol Business Unit, Dept Med Chem, Palo Alto, CA 94303, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoJaime-Figueroa, S, Roche Biosci, Neurobiol Business Unit, Dept Med Chem, 3401 Hillview Ave, Palo Alto, CA 94303 USA TI - Synthesis and experimental study of through-space hydrogen-fluorine and carbon-fluorine spin-spin coupling in 4,5-substituted 1-acetyl-8-fluoronaphthalenes AB - The synthesis and NMR study (H-1, C-13, and F-19) of a complete series of 4,5-substituted 1-acetyl-8-fluoronaphthalenes are reported. This data revealed a (6)J(H,F) and a (5)J(C,F) through space coupling between the fluorine and the methyl on the acetyl group (H-1 and C-13). The magnitude of this coupling constant changes depending on the nature of the substituent at C-4, the internuclear distance, and the solvent. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000086822500014 L2 - H-1 NMR;C-13 NMR;F-19 NMR;through-space coupling;long range spin-spin coupling;acetylfluoronaphthalenes SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2000 ;56(6):1167-1178 996 UI - 15007 AU - Jaime-Garcia R AU - Trinidad-Correa R AU - Felix-Gastelum R AU - Orum TV AU - Wasmann CC AU - Nelson MR AD - Univ Arizona, Dept Plant Pathol, Tucson, AZ 85721, USAAlimentos Del Fuerte, Los Mochis, Sinaloa, MexicoAgridiagnosticos, Los Mochis, Sinaloa, MexicoJaime-Garcia, R, USDA ARS, So Reg Res Ctr, 1100 Robert E Lee Blvd, New Orleans, LA 70124 USA TI - Temporal and spatial patterns of genetic structure of Phytophthora infestans from tomato and potato in the Del Fuerte Valley AB - The temporal and spatial patterns of Phytophthora infestans population genetic structure were analyzed in the Del Fuerte Valley, Sinaloa, Mexico, during the crop seasons of 1994 to 1995, 1995 to 1996, and 1996 to 1997 by geographical information systems. Isolates of P. infestans were obtained from infected tissue of tomato and potato collected from two areas: (i) where both potatoes and tomatoes are grown, and (ii) where:only tomatoes are grown. The isolates were characterized by mating type, allozymes at the glucose-6-phosphate isomerase and peptidase loci, restriction fragment length polymorphism (RFLP) fingerprint with probe; RG57, metalaxyl sensitivity, and aggressiveness to tomato and potato. The results suggest presence of an asexual population with frequent immigrations from outside the valley. There was a shift of mating type in the population from predominantly A2 to completely Al in this period. The co-occurrence of mating types was restricted to very few fields in the area around Los Mochis where tomato and potato crops are grown. Genotype variation based on allozyme analysis and mating type was low with only one genotype affecting both crops each year. The genotypes affecting both crops were the only genotypes highly aggressive to both tomato and potato in laboratory aggressiveness tests and the only genotypes widespread on both the tomato and potato crops in the valley each year. These predominant genotypes were highly resistant to the fungicide metalaxyl. Data on metalaxyl sensitivity indicate that allozyme analysis can discriminate between sensitive and resistant isolates in the Del Fuerte Valley. RFLP analysis with the probe RG57 gives further discrimination of genotypes within an allozyme genotype. In the 1995 to 1996 season, four different RFLP genotypes were found within an allozyme genotype. However, there were five other dilocus allozyme genotypes that could not be further split by RFLP analysis in 1995 to 1996 and 1996 to 1997 seasons. Spatial analysis of genotypes suggests that each season individual fields near Los Mochis became infected with one or more genotypes, but only a single genotype, aggressive on both potato and tomato, occurred south and east to the Guasave area MH - USA MH - Mexico|Sinaloa PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000090072400001 L2 - GEOGRAPHIC INFORMATION-SYSTEMS; PLANT-DISEASE EPIDEMIOLOGY; LATE BLIGHT; POPULATION-GENETICS; UNITED-STATES; GENOTYPIC DIVERSITY; SEXUAL REPRODUCTION; FAMINE FUNGUS; RESISTANCE; NETHERLANDS SO - Phytopathology 2000 ;90(11):1188-1195 997 UI - 15871 AU - Jaimez R AU - Cooney A AU - Jackson K AU - Lemus AE AU - Lemini C AU - Cardenas M AU - Garcia R AU - Silva G AU - Larrea F AD - Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoBaylor Coll Med, Dept Cell Biol, Houston, TX 77030, USAUniv Nacl Autonoma Mexico, Sch Med, Dept Pharmacol, Mexico City 04510, DF, MexicoLarrea, F, Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, Mexico TI - In vivo estrogen bioactivities and in vitro estrogen receptor binding and transcriptional activities of anticoagulant synthetic 17 beta-aminoestrogens AB - Estrogenic activities of the two 17 beta-aminoestrogen (AE) derivatives, prolame and butolame, were studied upon coagulation, serum luteinizing hormone (LH) and uterine weight, including endometrial morphology in castrated female rats. We have also investigated the ability of these two compounds, as well as another AE pentolame, to activate transcription through the estrogen receptor alpha (ER alpha) and the estrogen receptor beta (ER beta). Administration of prolame and butolame to castrated animals increased significantly (P < 0.01) the mean clotting time when compared with that obtained in the group of control animals. Butolame was a more potent anticoagulant than prolame (P < 0.01); as judged by their corresponding IC50 (5.4 +/- 0.65 and 66.6 +/- 2.57 mu g/animal, respectively). In contrast, estradiol significantly shortened blood clotting times (P < 0.005). Both prolame and butolame caused a significant inhibition of serum LH levels (EC50 8.10 +/- 0.79 and 17 +/- 64 mu g/animal, respectively), and restored castration-induced reduction in uterine weight of ovariectomized rats (EC50 4.14 +/- 1.57 and 17.0 +/- 1.78 mu g/animal, respectively). In terms of the effects of prolame, butolame and pentolame in transient transfection assays, all the three AE activated ER dependent reporter gene expression, however, only at high concentrations. Prolame had the highest activity followed by butolame and pentolame. Induction of transcription by these compounds was preferentially mediated through the ER alpha, especially in the case of pentolame where little, if any, activation occurred through the ER beta. None of the compounds showed antagonistic activities through either ER subtype. The overall data suggest that modifications in the structure and length of the amino-alcohol side-chain at C-17 might have an impact on the affinity and estrogenic intrinsic properties of AE at the level of diverse target tissues. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0960-0760 UR - ISI:000087535900007 L2 - RETINOIC ACID RECEPTORS; PLATELET-AGGREGATION; THYROID-HORMONE; NORETHISTERONE; PENTOLAME; ANTIESTROGENS; PHARMACOLOGY; MECHANISMS; SITES SO - Journal of Steroid Biochemistry and Molecular Biology 2000 ;73(1-2):59-66 998 UI - 16562 AU - Jan J AU - Valle F AU - Bolivar F AU - Merino E AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoGen Int Inc, Palo Alto, CA 94304, USAMerino, E, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Characterization of the 5 ' subtilisin (aprE) regulatory region from Bacillus subtilis AB - The aprE gene of Bacillus subtilis encodes the major serine alkaline protease known as subtilisin. it is expressed during the transition slate and transcribed by the sigma(A) form of the RNA polymerase (RNAP). In this work, we characterized the regulatory region of the aprE gene (rraprE) from B. subtilis. By computer analysis and site-directed mutagenesis, we localized the aprE promoter sequence 7 bp upstream from its transcription initiation site (TIS). We also characterized the static curvature properties of the rraprE DNA and found two different areas of DNA bending, within the first 400 bp upstream of its TIS. We postulate that these particular curved DNA regions could play a role in the interaction with some regulatory proteins and discuss possible implications related to aprE transcription regulation. (C) 2000 Federation of European Microbiological Societies, Published by Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000085121500002 L2 - aprE;curved DNA;site-directed mutagenesis;promoter sequence;Bacillus subtilis;ESCHERICHIA-COLI; PROMOTER SEQUENCES; RNA-POLYMERASE; CURVED DNA; UPSTREAM; EXPRESSION; INVITRO; GENE; TRANSCRIPTION SO - Fems Microbiology Letters 2000 ;183(1):9-14 999 UI - 14748 AU - Jarabo-Lorenzo A AU - Velazquez E AU - Perez-Galdona R AU - Vega-Hernandez MC AU - Martinez-Molina E AU - Mateos PF AU - Vinuesa P AU - Martinez-Romero E AU - Leon-Barrios M AD - Univ La Laguna, Fac Farm, Dept Microbiol & Biol Celular, Tenerife 38071, SpainUniv Salamanca, Dept Microbiol & Genet, E-37008 Salamanca, SpainUniv Marburg, Fachgebiet Angew Bot & Zellbiol, Marburg, GermanyUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoLeon-Barrios, M, Univ La Laguna, Fac Farm, Dept Microbiol & Biol Celular, Tenerife 38071, Spain TI - Restriction fragment length polymorphism analysis of 16S rDNA and low molecular weight RNA profiling of rhizobial isolates from shrubby legumes endemic to the Canary islands AB - Thirty-six strains of slow-growing rhizobia isolated from nodules of four woody legumes endemic to the Canary islands were characterised by 16S rDNA PCR-RFLP analyses (ARDRA) and LMW RNA profiling, and compared with reference strains representing Bradyhizobium japonicum, B. elkanii, B. liaoningense, and two unclassified Bradyyrhizobium sp. (Lupinus) strains. Both techniques showed similar results, indicating the existence of three genotypes among the Canarian isolates. Analysis of the combined RFLP patterns obtained with four endonucleases, showed the existence of predominant genotype comprising 75% of the Canarian isolates (BTA-1 group) and the Bradyrhizobium sp. (Lupinus) strains. A second genotype was shared by nine Canarian isolates (BGA-1 group) and the B. japonicum and B. liaoningense reference strains. The BES-5 strain formed an independent group, as also did the B, elkanii reference strains. LMW RNA profile analysis consistently resolved the same three genotypes detected by 16S ARDRA among the Canarian isolates, and suggested that all these isolates are genotypically more related to B. japonicum than to B. elkanii or B. liaoningense. Cluster analysis of the combined 16S ARDRA and LMW RNA profiles resolved the BTA-1 group with the Bradyrhizobium so. (Lupinus) strains, and the BES-5 isolate, as a well separated sub-branch of the B. japonicum cluster. Thus, the two types of analyses indicated that the isolates related to BTA-1 conform a group of bradyrhizobial strains that can be clearly distinguishable from representants of the tree currently described Bradyrhizobium species. No correlation between genotypes, host legumes, and geographic location was found MH - Germany MH - Mexico|Morelos MH - Spain PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0723-2020 UR - ISI:000165706500017 L2 - 16S rDNA RFLP analysis;LMW RNA profiles;Bradyrhizobium;Canary Islands;tagasaste;(Chamaecytisus proliferus);genetic diversity;PEANUT ARACHIS-HYPOGAEA; STAIRCASE ELECTROPHORESIS; BRADYRHIZOBIUM-JAPONICUM; GENETIC DIVERSITY; ROOT-NODULES; SP-NOV; STRAINS; PHYLOGENY; IDENTIFICATION; AESCHYNOMENE SO - Systematic and Applied Microbiology 2000 ;23(3):418-425 1000 UI - 16684 AU - Jaramillo L AU - Diaz F AU - Hernandez P AU - Debray H AU - Trigo F AU - Mendoza G AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Med, Mexico City 04510, DF, MexicoInst Nacl Invest Forestales & Agropecuarias, CENID Microbiol, Sagar, MexicoInst Nacl Enfermedades Resp, Dept Bioquim, Secretaria Salud, Mexico City, DF, MexicoUniv Sci & Tech Lille Flandres Artois, Chim Biol Lab, UMR 8576, CNRS, F-59655 Villeneuve Dascq, FranceUNAM, Dept Patol, Fac Med Vet & Zootecn, Mexico City, DF, MexicoZenteno, E, Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Med, POB 70159, Mexico City 04510, DF, Mexico TI - Purification and characterization of an adhesin from Pasteurella haemolytica AB - We purified an adhesin from Pasteurella. haemolytica by affinity chromatography using glutaraldehyde treated rabbit erythrocytes stroma, The adhesin is a protein of 68 kDa, as determined by SDS-PAGE, and the most abundant amino acids constituting this protein mere Gly, Ser, Glx, and Ala, and low concentrations of Cys, Met, and Tyr residues mere also found. The N-terminal sequence of the adhesin is ANEVNVYIYKQPYLI, No carbohydrate residues were detected, The adhesin agglutinated rabbit erythrocytes but when the latter were desialylated or pronase treated the agglutinating activity was abolished. The agglutinating activity of the adhesin was inhibited with N-acetyl-D-glucosamine (GlcNAc), and in a lesser degree with N-acetyl-neuraminic acid (NeuAc). GalNAc, N-glycolyl-neuraminic acid, N-deacetylated GlcNAc, or neutral sugars do not modify the activity of the adhesin, The equatorial -OH on C4 and the NH-acetylated group on C2 from GlcNAc, as well as the 4-OH and NH-acetylated group on C5 from NeuAc seem to be responsible for the interaction with the adhesin, The protein is divalent cation-dependent and thermolabile, As for the agglutinating activity, the adhesion of P.haemolytica to tracheal cell-cultures was inhibited by GlcNAc, NeuAc or the purified adhesin, strongly suggesting that the P.haemolytica adhesin plays an important role in infection, MH - France MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0959-6658 UR - ISI:000084463900004 L2 - Pasteurella haemolytica;glycoproteins;bacterial adhesin;N-acetyl-glucosamine;sialic acid;RESPIRATORY-DISEASE; SEROTYPES; PROTEINS; CHAINS; MUCIN SO - Glycobiology 2000 ;10(1):31-37 1001 UI - 16337 AU - Jaros PP AU - Huberman A AU - Sedlmeier D AU - Keller R AD - Univ Oldenburg, Abt Zoophysiol, D-26111 Oldenburg, GermanyInst Nacl Nutr Salvador Zubiran, Dept Biochem, Mexico City 14000, DF, MexicoUniv Bonn, Inst Zoophysiol, D-53115 Bonn, GermanyJaros, PP, Univ Oldenburg, Abt Zoophysiol, Postfach 2503, D-26111 Oldenburg, Germany TI - Improved isolation of the crustacean hyperglycemic hormone-containing granules from sinus glands of Carcinus maenas (Linnaeus, 1758) AB - An improved neurosecretory granule (NSG) preparation of the shore crab, Carcinus maenas sinus glands, enriched for members of the crustacean hyperglycemic hormone family (CHH) and almost devoid of contaminating subcellular fractions, was obtained by differential and density-gradient centrifugations. CHH was determined in an aliquot of each fraction by means of a specific radioimmunoassay, and purity of the fractions by means of electron microscopy of pellet sections from duplicate tubes. Fraction F-3 from the first discontinuous gradient centrifugation was enriched for CHH-containing NSG and purified on a second, shallower discontinuous gradient, and fraction F-3b proved to contain solely CHH granules as revealed by EM and RIA criteria MH - Germany MH - Mexico|Distrito Federal PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000086103900001 L2 - AMINO-ACID-SEQUENCE; SHORE CRAB; INHIBITING HORMONE; SECRETORY GRANULES; LEU-ENKEPHALIN; CRAYFISH; PEPTIDES; CHH; NEUROPEPTIDES; LOCALIZATION SO - Crustaceana 2000 ;73():129-142 1002 UI - 14915 AU - Jensen RV AU - Flores-Rueda H AU - Wright JD AU - Keeler ML AU - Morgan TJ AD - Wesleyan Univ, Dept Phys, Middletown, CT 06459, USAUniv Guanajuato, Inst Fis, Guanajuato, MexicoFlores-Rueda, H, Wesleyan Univ, Dept Phys, Middletown, CT 06459, USA TI - Structure of the Stark recurrence spectrum AB - The primary goal of research in ''quantum chaos'' is to explore the extent to which the methods and natural intuition of,classical mechanics can be used to elucidate the complex and often surprising behavior of large quantum systems. Much recent work is based on the deep connections between classical periodic (or closed) orbits and the quantum spectrum revealed by semiclassical "trace formulas." These ideas have; important applications in the analysis of the ''recurrence spectrum'' of Rydbeg atoms in strong static electric fields in which the measured peaks are associated with individual classical periodic orbits. Here we present detailed experimental measurements of the recurrence spectrum for n = 15-25, singlet and triplet, m = 0, 1, helium Rydberg atoms and we provide a purely quantum-mechanical explanation for the structure of the recurrence spectrum based on the regularities of the Stark photoabsorption spectrum. This analysis Serves to demystify these (still complex) representations of the quantum spectrum; provides new insight into the functional differences between hydrogen and helium Rydberg atoms in strong fields; and reemphasizes the remarkable correpondence between the classical and quantum theory for these systems MH - Mexico|Guanajuato MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000165200800095 L2 - SCALED-ENERGY SPECTROSCOPY; ELECTRIC-FIELD; CLOSED ORBITS; PERIODIC-ORBITS; ATOMS; BIFURCATIONS; HELIUM SO - Physical Review A 2000 ;62(5): 1003 UI - 16269 AU - Jeziorski MC AU - Greenberg RM AU - Anderson PAV AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla 76230, Queretaro, MexicoUniv Florida, Whitney Lab, St Augustine, FL 32086, USAUniv Florida, Dept Neurosci, St Augustine, FL 32086, USAUniv Florida, Dept Physiol, St Augustine, FL 32086, USAJeziorski, MC, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla 76230, Queretaro, Mexico TI - The molecular biology of invertebrate voltage-gated Ca2+ channels AB - The importance of voltage-gated Ca2+ channels in cellular function is illustrated by the many distinct types of Ca2+ currents found in vertebrate tissues, a variety that is generated in part by numerous genes encoding Ca2+ channel subunits. The deg;ree to which this genetic diversity is shared by invertebrates has only recently become apparent, Cloning of Ca2+ channel subunits from various invertebrate species, combined with the wealth of information from the Caenorhabditis elegans genome, has clarified the organization and evolution of metazoan Ca2+ channel genes. Functional studies have employed novel structural information gained from invertebrate Ca2+ channels to complement ongoing research on mammalian Ca2+ currents, while demonstrating that the strict correspondence between pharmacological and molecular classes of vertebrate Ca2+ channels does not fully extend to invertebrate tissues. Molecular structures can now be combined with physiological data to develop a more cogent system of categorizing invertebrate channel subtypes, In this review, we examine recent progress in the characterization of invertebrate Ca2+ channel genes and its relevance to the diversity of invertebrate Ca2+ currents MH - Mexico|Queretaro MH - USA PB - CAMBRIDGE: COMPANY OF BIOLOGISTS LTD RP - NOT IN FILE U3 - TC 41 U4 - Biology U5 - J;Review AV - English IS - 0022-0949 UR - ISI:000086149500001 L2 - metazoan;evolution;dihydropyridine;omega-conotoxin;omega-agatoxin;alpha-1 subunit;beta subunit;alpha-2-delta subunit;cnidarian;Drosophila melanogaster;Loligo bleekeri;Musca domestica;Aplysia californica;Caenorhabditis elegans;Ca2+ channel;SENSITIVE CALCIUM-CHANNEL; PUTATIVE SODIUM-CHANNEL; AMINO-ACID-SEQUENCE; BAG CELL NEURONS; JELLYFISH CYANEA-CAPILLATA; STATIONARY NIGHT BLINDNESS; BETA-SUBUNIT HETEROGENEITY; SQUID LOLIGO-OPALESCENS; FUNCTIONAL EXPRESSION; SKELETAL-MUSCLE SO - Journal of Experimental Biology 2000 ;203(5):841-856 1004 UI - 15898 AU - Jiang X AU - Wilton N AU - Zhong WM AU - Farkas T AU - Huang PW AU - Barrett E AU - Guerrero M AU - Ruiz-Palacios G AU - Green KY AU - Green J AU - Hale AD AU - Estes MK AU - Pickering LK AU - Matson DO AD - Eastern Virginia Med Sch, Childrens Hosp Kings Daughters, Ctr Pediat Res, Norfolk, VA 23510, USADept Hlth, Richmond, VA, USAInst Nutr, Dept Infect Dis, Mexico City, DF, MexicoNIAID, Infect Dis Lab, NIH, Bethesda, MD 20892, USABaylor Coll Med, Div Virol, Houston, TX, USACent Publ Hlth Lab, Virus Reference Lab, London NW9 5HT, EnglandJiang, X, Eastern Virginia Med Sch, Childrens Hosp Kings Daughters, Ctr Pediat Res, 855 W Brambleton Ave, Norfolk, VA 23510 USA TI - Diagnosis of human caliciviruses by use of enzyme immunoassays AB - The application of molecular technologies, such as the expression of viral proteins in baculovirus, has provided a powerful approach to the diagnosis of human calicivirus (HuCV) infections, The baculovirus-expressed HuCV capsid protein self-assembles into virus-like particles, providing excellent reagents for immunologic assays, such as enzyme immunoassays (EIAs), Following the expression of the capsid protein of Norwalk virus, the capsid proteins of 8 other HuCV strains have been expressed in baculovirus. The unlimited supply of baculovirus-produced reagents for HuCVs allows these EIAs to be applied in large-scale clinical and epidemiological studies. Both the antigen and antibody-detection EIAs are highly sensitive. The antigen-detection EIAs are highly specific, but the antibody-detection EIAs are more broadly reactive. This article reviews baculovirus expression techniques used to produce HuCV capsid antigens, development of EIAs using these antigens, and application of these EIAs in studies of HuCV infection and illness MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 43 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000087439400017 L2 - ROUND-STRUCTURED VIRUSES; NORWALK-LIKE VIRUS; IMMUNE ELECTRON-MICROSCOPY; SNOW MOUNTAIN AGENT; LINKED IMMUNOSORBENT ASSAYS; CAPSID PROTEIN; MEXICO VIRUS; MOLECULAR CHARACTERIZATION; IMMUNOGLOBULIN-M; UNITED-KINGDOM SO - Journal of Infectious Diseases 2000 ;181():S349-S359 1005 UI - 15075 AU - Jimenez-Benito L AU - Diaz AI AU - Terlevich R AU - Terlevich E AD - Univ Autonoma Madrid, Dept Fis Teor CXI, E-28049 Madrid, SpainUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astron Opt & Elect, Puebla, MexicoJimenez-Benito, L, Univ Autonoma Madrid, Dept Fis Teor CXI, E-28049 Madrid, Spain TI - Stellar indices and kinematics in Seyfert 1 nuclei AB - We present spectra of six type 1 and two type 2 Seyfert galaxies, a starburst galaxy and a compact narrow-line radio galaxy, taken in two spectral ranges centred around the near-infrared Call triplet (similar to 8600 Angstrom), and the Mgb stellar feature at 5180 Angstrom. We measured the equivalent widths (EWs) of these features and the Fe-52 and Fe-53 spectral indices. We found that the strength of the infrared Ca II triplet (CaT) in type 1 Seyfert galaxies with prominent central point sources is larger than what would be expected from the observed strength of the blue indices. This could be explained by the presence of red supergiants in the nuclei of Seyfert 1 galaxies. On the other hand, the blue indices of these galaxies could also be diluted by the strong Fe II multiplets that can be seen in their spectra. We have also measured the stellar- and gas-velocity dispersions of the galaxies in the sample. The stellar velocity dispersions were measured using both the Mgb and CaT stellar features. The velocity dispersion of the gas in the narrow-line region (NLR) was measured using the strong emission lines [O III] lambda lambda 5007, 4959 and [S III] lambda 9069. We compare the gas and star-velocity dispersions and find that the magnitudes of both are correlated in Seyfert galaxies. Most of the Seyfert 1 galaxies that we observe have stellar-velocity dispersions somewhat greater than that of the gas in the NLR MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000089857200019 L2 - galaxies : active;galaxies : kinematics and dynamics;galaxies : nuclei;galaxies : Seyfert;galaxies : stellar content;ACTIVE GALACTIC NUCLEI; NARROW-LINE REGION; LARGE-SCALE OUTFLOWS; CA-II TRIPLET; GASEOUS KINEMATICS; MARKARIAN GALAXIES; RADIO STRUCTURES; STARBURST MODEL; SUPERNOVA 1988Z; ALPHA EMISSION SO - Monthly Notices of the Royal Astronomical Society 2000 ;317(4):907-921 1006 UI - 16511 AU - Jimenez-Estrada M AU - Reyes-Chilpa R AU - Hernandez-Ortega S AU - Cristobal-Telesforo E AU - Torres-Colfn L AU - Jankowski CK AU - Aumelas A AU - Van Calsteren MR AD - Univ Moncton, Dept Chim & Biochim, FESR, Moncton, NB E1A 3E9, CanadaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoJankowski, CK, Univ Moncton, Dept Chim & Biochim, FESR, Moncton, NB E1A 3E9, Canada TI - Two novel Diels-Alder adducts from Hippocratea celastroides roots and their insecticidal activity AB - Two novel compounds, celastroidine A (1) and B (2), were isolated from the roots of Hippocratea celastroides K. Their structures were elucidated by spectroscopical and X-ray diffraction studies. Celastroidine A (1) (C50H74O5) was identified as a Diels-Alder adduct of a triterpene plus a diterpene and celastroidine B (2) as a beyerane, a type of dimer of two diterpene (C40H60O4). Both compounds could be formed in vivo by a Diels-Alder reaction. Celastroidine A showed some antifeeding activity against the stored grain insect Sitophyllus zeamays MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0008-4042 UR - ISI:000085328300009 L2 - Hippocratea celastroides;Hippocrataceae;roots;Diels-Alder adducts;diterpenoids;triterpenoids;x-ray diffraction;insect antifeedants;stored grain insects;Sitophyllus zeamays;insecticidal plants;Diels-Alderase;ENZYMATIC-ACTIVITY; BIOSYNTHESIS; NMR; SPECTROSCOPY SO - Canadian Journal of Chemistry-Revue Canadienne de Chimie 2000 ;78(2):248-254 1007 UI - 14856 AU - Jimenez-Garcia S AU - Magana ME AU - itez-Read JS AU - Martinez-Carballido J AD - Inst Tecnol Toluca, Toluca 50000, Edo Mexico, MexicoOregon State Univ, Corvallis, OR 97331, USAInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, Pue, MexicoBenitez-Read, JS, Inst Tecnol Toluca, Apartado Postal 890, Toluca 50000, Edo Mexico, Mexico TI - Modelling, simulation, and gain scheduling control of large radiotelescopes AB - A detailed model of a radiotelescope (yoke on king post parabolic antenna) is developed. It uses modelling concepts that have been successfully applied to industrial robotic systems. In this approach, the interactions between the different dynamically coupled subsystems are viewed as disturbances whose dynamic behaviours are known. The proposed controller for the radiotelescope was developed by using a gain-scheduling strategy, which has the advantage of using known parameters for every region of operation. Thus, the computational complexity is substantially decreased and, in consequence, the parameters for each region of operation can be independently computed by inexpensive stand-alone microcomputers. (C) 2000 Elsevier Science B,V, All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering U5 - J;Article AV - English IS - 0928-4869 UR - ISI:000165323000001 L2 - modelling;gain scheduling;PID tuning rules;radiotelescope mounting;robotic arms SO - Simulation Practice and Theory 2000 ;8(3-4):141-160 1008 UI - 14633 AU - Jimenez-Perez VM AU - Camacho-Camacho C AU - Guizado-Rodriguez M AU - Noth H AU - Contreras R AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv A Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyContreras, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - New hexacyclic binuclear tin complexes derived from bis-(3,5-di-tert-butyl-2-phenol)oxamide AB - The syntheses of bis-(3,5-di-tert-butyl-2-phenol)oxamide (2a) and four new hexacyclic bimetallic tin compounds derivatives are reported: bis-(3,5-di-tert-butyl-2-oxo-phenyl)-oxamido-bis(dibutyltin) (3), bis-(3,5-di-tert-butyl-2-oxo-phenyl)-oxamido-bis(diphenyltin) (4), bis(triethylammonium) bis-(3,5-di-tert-butyl-2-oxo-phenyl)-oxamido-bis-(dichlorobutyl-stannate ) (5), and bis[(O-Sn) ethanol]-bis-(3, 5-di-tert-butyl-2-oxo-phenyl)-oxamido-bis-(chlorophenyltin) (6). All tin compounds show a planar ligand skeleton in which each tin atom is linked to the phenoxy group, to the anilinic nitrogen atom and to the oxygen of the oxamide group. Compounds 3 and 4 have two pentacoordinated diorganyl tin atoms with a distorted bpt geometry, whereas 5 contains a dianionic structure with two hexacoordinated tin atoms bonded to a n-butyl group and to two chlorine atoms and two triethyl ammonium as counterions. Compound 6 has two hexacoordinated tin atoms, each atom is bonded, in addition to the ligand, to one phenyl and one chlorine and coordinated to an ethanol molecule. Characterization of the compounds was made through usual analytical and spectroscopic methods. Structures of 4,6-di-tert-butyl-1-phenol-2-amine 1, the oxamide 2a and the four tin compounds 3-6 were established by the X-ray diffraction analyses. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000165878100038 L2 - hexacyclic binuclear tin complexes;bis-(3,5-di-tert-butyl-2-phenol)oxamide;X-RAY-DIFFRACTION; DIBENZOBICYCLIC PHOSPHORANE; OXAMIDE DERIVATIVES; RADICAL LIGANDS; METAL-IONS; REACTIVITY; NMR; EXCHANGE SO - Journal of Organometallic Chemistry 2000 ;614():283-293 1009 UI - 16665 AU - Jimenez B AU - Chavez A AU - Leyva A AU - Tchobanoglous G AD - UNAM, Inst Ingn, Grp Tratamiento & Reuso, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Civil & Environm Engn, Davis, CA, USAJimenez, B, UNAM, Inst Ingn, Grp Tratamiento & Reuso, Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - Sand and synthetic medium filtration of advanced primary treatment effluent from Mexico City AB - One of the best options for handling Mexico City's 74.5 m(3)/s of wastewater is to use advanced primary treatment (APT), filter and disinfect the effluent before it is reused in agriculture. The final effluent must contain less than helminth egg (HE) per liter and less than 1000 fecal coliforms (MPN)/100 mL while still retaining nutrients and organic matter for their agronomic benefits. Sand and synthetic filters were tested on the effluent of a 12 L/s pilot APT plant. The average APT effluent concentration of helminth eggs was 1.2 HE/L and both fillers produced effluent concentrations ranging from 0 to 0.52 HE/L. Although the removal efficiencies of the sand and synthetic filters were similar, the synthetic filter had several important advantages over the sand filter: (a) The filtration rate of the synthetic filter was more than 5.8 times that of the sand filter and the production rate per run per al ea was 2.1 times than of the sand filler. (b) The synthetic filter required less than 1% of the raw wastewater for backwashing, while the sand filler required twice as much filtered wastewater. Although, the synthetic filter has higher capital costs and has a more complex design and operation, the overall costs would most likely be lower due to its higher production rate. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000084601300013 L2 - advanced primary treatment;agricultural reuse;helminth eggs;high-rate filtration;sand filter;synthetic medium filter;WASTE-WATER SO - Water Research 2000 ;34(2):473-480 1010 UI - 16473 AU - Jochem FJ AU - Smith GJ AU - Gao Y AU - Zimmerman RC AU - Cabello-Pasini A AU - Kohrs DG AU - Alberte RS AD - Univ Texas, Inst Marine Sci, Port Aransas, TX 78373, USAMoss Landing Marine Labs, Moss Landing, CA 95039, USARutgers State Univ, New Brunswick, NJ 08903, USAUniv Autonoma Baja California, Ensenada, Baja California, MexicoPhycoGen Inc, Portland, ME, USAJochem, FJ, Univ Texas, Inst Marine Sci, 750 Channel View Dr, Port Aransas, TX 78373 USA TI - Cytometric quantification of nitrate reductase by immunolabeling in the marine diatom Skeletonema costatum AB - Background: The uptake of nitrate by phytoplankton is a central issue in biological oceanography due to its importance to primary production and vertical flux of biogenic carbon. Nitrate reductase catalyzes the first step of nitrate assimilation, the reduction of NO3 to NO2. A cytometric protocol to detect and quantify relative changes in nitrate reductase (NR) protein content of the marine centric diatom Skeletonema costatum is presented. Methods: Immunolabeling of NR protein was achieved with polyclonal antibodies raised against S. costatum NR. Antisera specific to a NR protein subunit and to a NR polypeptide sequence were compared, and cytometric results of NR protein abundance mere related to Western analyses. Changes in cellular NR abundance and activity were followed during an upwelling simulation experiment in which S. costatum was exposed to a shift from ammonia to nitrate as major nitrogen source. Results: NR protein could be detected in NO3-grown cells and at extremely low levels hardly discernible by Western Blot densiometry in NH4-grown cells. The protocol allowed observation of early stages of NR induction during an upwelling simulation. NR abundance increased after the nutrient shift to reach a new physiological "steady-state" 96 hrs later. NR activity exhibited diel variation with maxima at mid-day. NR abundance as estimated by both non: cytometry and Western analysis exhibited a hyperbolic relationship to NR activity. This pattern suggests post-translational activation of NR protein. Conclusions: The presented protocol allows the differentiation of NH4- versus NO3-grown algae as well as the monitoring of early stages in the induction of nitrate assimilatory capacities. (C) 2000 Wiley Liss, Inc MH - Mexico|Baja California MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 5 U4 - Biochemical Research Methods;Cell Biology U5 - J;Article AV - English IS - 0196-4763 UR - ISI:000085501500001 L2 - Skeletonema costatum;flow cytometry;nitrate reductase;immunolabeling;upwelling;phytoplankton bloom;STEADY-STATE LIGHT; LIMITATION; IRRADIANCE; RESPONSES; GONYAULAX; GROWTH SO - Cytometry 2000 ;39(3):173-178 1011 UI - 15513 AU - Johansson C AU - Castillejo-Lopez C AU - Johanneson B AU - Svenungsson E AU - Gunnarsson I AU - Frostegard J AU - Sturfelt G AU - Truedsson L AU - Lofstrom B AU - cocer-Varela J AU - Lundberg I AU - Gyllensten UB AU - arcon-Segovia D AU - arcon-Riquelme ME AD - Univ Uppsala, Dept Genet & Pathol, Med Genet Sect, Rudbeck Lab, S-75185 Uppsala, SwedenKarolinska Hosp, Rheumatol Unit, S-10401 Stockholm, SwedenUniv Lund Hosp, Dept Rheumatol, S-22185 Lund, SwedenUniv Lund Hosp, Dept Clin Microbiol, S-22185 Lund, SwedenMalarsjukhuset, Dept Med, Eskilstuna, SwedenInst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoUniv Uppsala, Uppsala Genome Ctr, Rudbeck Lab, S-75185 Uppsala, SwedenAlarcon-Riquelme, ME, Univ Uppsala, Dept Genet & Pathol, Med Genet Sect, Rudbeck Lab, S-75185 Uppsala, Sweden TI - Association analysis with microsatellite and SNP markers does not support the involvement of BCL-2 in systemic lupus erythematosus in Mexican and Swedish patients and their families AB - We have described suggestive linkage between microsatellite markers within the cytogenetic region 18q21-23 and SLE, a region where linkage with other autoimmune diseases has also been detected. The Bcl-2 gene located within this region, is a candidate gene because of its role in apoptosis, a physiological mechanism that could be deregulated in autoimmune disease. Furthermore, several studies have found abnormalities of Bcl-2 expression in SLE patients. We therefore sought to determine if the Bcl-2 gene is involved in SLE by studying members of a large cohort of Mexican SLE patients (n = 378) and 112 Swedish simplex families. Using a microsatellite marker and two single nucleotide polymorphisms located within the gene, we were unable to detect association between Bcl-2 and SLE in either population. We also tested whether combinations of alleles of the Bcl-2 and IL-10.G microsatellites would increase the risk for SLE. Our results do not support such hypothesis. Our findings suggest that linkage between SLE and the 18q21-23 region is due to a gene other than Bcl-2 MH - Mexico|Distrito Federal MH - Sweden PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 13 U4 - Genetics & Heredity;Immunology U5 - J;Article AV - English IS - 1466-4879 UR - ISI:000088695800006 L2 - systemic lupus erythematosus;bcl-2;genetics;apoptosis;SNP;autoimmunity;BLOOD MONONUCLEAR-CELLS; AUTOANTIBODY PRODUCTION; APOPTOTIC CELLS; EXPRESSION; SUSCEPTIBILITY; LYMPHOCYTES; PROTOONCOGENE; LINKAGE; DISEASE; DEATH SO - Genes and Immunity 2000 ;1(6):380-385 1012 UI - 15287 AU - Jonsson-Akerman BJ AU - Escudero R AU - Leighton C AU - Kim S AU - Schuller IK AU - Rabson DA AD - Univ Calif San Diego, Phys Dept 0319, La Jolla, CA 92093, USAUniv S Florida, Dept Phys, Tampa, FL 33620, USAUNAM, IIM, Mexico City, DF, MexicoJonsson-Akerman, BJ, Univ Calif San Diego, Phys Dept 0319, La Jolla, CA 92093 USA TI - Reliability of normal-state current-voltage characteristics as an indicator of tunnel-junction barrier quality AB - We demonstrate that one of the most commonly used criteria to ascertain that tunneling is the dominant conduction mechanism in magnetic tunnel junctions-fits of current-voltage (I-V) data-is far from reliable. Using a superconducting electrode and measuring the differential conductance below T-c, we divide samples into junctions with an integral barrier and junctions having metallic shorts through the barrier. Despite the clear difference in barrier quality, equally reasonable fits to the I-V data are obtained above T-c. Our results further suggest that the temperature dependence of the zero-bias resistance is a more solid criterion, which could therefore be used to rule out possible pinholes in the barrier. (C) 2000 American Institute of Physics. [S0003-6951(00)01138-4] MH - USA MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 43 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000089239000044 L2 - ROOM-TEMPERATURE; METAL; MAGNETORESISTANCE; NANOCONTACTS; EXCESS SO - Applied Physics Letters 2000 ;77(12):1870-1872 1013 UI - 14531 AU - Jording A AU - Ferrari L AU - Arzate J AU - Jodicke H AD - Univ Munster, Inst Geophys, D-48149 Munster, GermanyNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Unidad Ciencias Tierra, Queretaro 76001, Qro, MexicoJording, A, Univ Munster, Inst Geophys, Corrensstr 24, D-48149 Munster, Germany TI - Crustal variations and terrane boundaries in southern Mexico as imaged by magnetotelluric transfer functions AB - To investigate the complex crustal structure of southern Mexico magnetotelluric (MT) data were acquired at 75 stations along two north-south profiles, 200-250 km apart, crossing several terrane boundaries whose interpretation has been controversial in the literature. Resulting sounding curves can be grouped, according to their shapes, into 10 different sets. Each of them may represent a crustal unit with a characteristic depth dependent electrical conductivity distribution. Often, the spatial extent of such a crustal unit matches well with a geological terrane. However, we also observed transition zones or sharp contrasts in crustal electrical properties which do not correspond to any defined terrane boundary. Transition zones are associated with low angle crustal structures (regional thrust faults or mylonitic zones) and/or with areas of plutonism, which are adding heterogeneities to the crust. In other cases our data suggest that terrane boundaries proposed on the basis of surface geology are probably shallow structures, which may not continue at depth. The comparison of apparent resistivity profiles with the available geologic information indicates that the MT method is capable of clearly defining zones affected by recent and active volcanism and tectonics as well as the part of the crust with Paleozoic and Precambrian metamorphic rock assemblages. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000166245500001 L2 - magnetotelluric surveys;continental crust;southern Mexico;tectonostratigraphic terranes;electrical crystal units;apparent resistivity;SOUTHWESTERN MEXICO; SUSPECT TERRANES; NORTH-AMERICA; VOLCANIC BELT; PLATE; GEOCHRONOLOGY; DISTORTION; MARGIN; ARC SO - Tectonophysics 2000 ;327(1-2):1-13 1014 UI - 13697 AU - Joseph GG AU - Geffroy E AU - Mena B AU - Walton OR AU - Huilgol RR AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Florida, Dept Mech Engn, Gainesville, FL 32611, USAFlinders Univ S Australia, Dept Math & Stat, Adelaide, SA 5001, AustraliaJoseph, GG, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360,Circuito Exterior,Cd Univ, Mexico City 04510, DF, Mexico TI - Simulation of filling and emptying in a hexagonal-shape solar grain silo AB - A new silo design for grain-storage is examined using a numerical procedure to model its 3D granular flows during the filling and emptying processes. The authors in Hernandez-Cordero, et al. [Korea-Australia Rheol. J. 12(1)269-281(2000)] have previously presented the design of the new silo and its observed flow behavior. Its main characteristic is the almost complete elimination of excessive dynamics stresses. Since the required computational resources to model the transient phenomena in these experiments are enormous, here, we present basic numerical results related to packing and dynamics of grains considering this complex design. Especial emphasis is given to simulate in great detail collisions of spherical grains with the walls, between themselves, as well as the complex geometry of the new silo, such as filling and unloading openings, inclined walls, etc. The interactions include compressive normal forces between grains as well as tangential forces involved in sliding and rolling between two kernels. Virtual contact mechanics valid in the vicinity of the symmetry plane of the silo are also prescribed, permitting predictions closer to experimentally observed behavior. In spite of the complexity of interactions, steady flow patterns results obtained with reasonable computational times are presented MH - Australia MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0272-6351 UR - ISI:000168690600004 L2 - GRANULAR-MATERIALS; COMPUTER-SIMULATION; CHUTE FLOWS; SHEAR FLOWS; WALL STRESS; VELOCITY; HOPPERS; 2D SO - Particulate Science and Technology 2000 ;18(4):309-327 1015 UI - 16207 AU - Juarez H AU - Scott R AU - Metcalfe R AU - Bagheri B AD - Univ Autonoma Metropolitana 1, Dept Matemat, Mexico City, DF, MexicoUniv Houston, Dept Math & Comp Sci, Texas Ctr Adv Mol Computat, Houston, TX, USAUniv Houston, Dept Mech Engn, Houston, TX, USAUniv Houston, Dept Math, Houston, TX, USATexas Ctr Adv Mol Computat, Houston, TX, USAScott, R, Univ Chicago, Dept Math & Comp Sci, Chicago, IL 60637, USA TI - Direct simulation of freely rotating cylinders in viscous flows by high-order finite element methods AB - Flow past a freely rotating cylinder with a fixed axis of rotation, placed asymmetrically in a two-dimensional channel (closer to one of the walls) has been studied numerically. This flow was modeled by the Navier-Stokes equations coupled with the equation of angular momentum of the cylinder. A simple explicit algorithm to simulate the cylinder-fluid interaction was used, and a semi-implicit scheme in combination with a high-order Lagrange finite element method was employed to solve the Navier-Stokes equations. All quantities of interest (such as lift and drag on the cylinder) were computed without taking advantage of the cylindrical geometry of the problem, making the algorithm suitable to study more general geometries, It was found that the cylinder in a channel may rotate in either the clockwise direction or in the opposite direction, depending on the Reynolds number and on the distance from the wall. These solutions could be steady or unsteady, but no unsteady solutions were found when the cylinder rotates in the counterclockwise direction. Also, it was found that the cylinder may experience a repulsive or attractive force to the wall. A detailed comparison of the solutions when the cylinder is fixed and when it is released to rotate freely was done in order to understand the mechanisms that cause the cylinder to rotate in one direction or the other, as well as how it is attracted to or repelled from the wall. These simulations may provide improved insight into the physics of the operation of micro-electromechanical systems pumps and turbines in their application to flow control. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Interdisciplinary Applications;Mechanics U5 - J;Article AV - English IS - 0045-7930 UR - ISI:000086358800004 SO - Computers & Fluids 2000 ;29(5):547-582 1016 UI - 16255 AU - Juarez K AU - Flores H AU - Davila S AU - Olvera L AU - Gonzalez V AU - Morett E AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoEuropean Mol Biol Lab, D-69117 Heidelberg, GermanyMorett, E, Univ Nacl Autonoma Mexico, Inst Biotecnol, AP 510-3, Cuernavaca 62250, Morelos, Mexico TI - Reciprocal domain evolution within a transactivator in a restricted sequence space AB - Although the concept of domain merging and shuffling as a major forte in protein evolution is well established, it has been difficult to demonstrate how domains coadapt. Here we show evidence of coevolution of the Sinorhizobium meliloti NifA (smNifA) domains. We found that, because of the lack of a conserved glycine in its DNA-binding domain, this transactivator protein interacts weakly with the enhancers. This defect, however, was compensated by evolving a highly efficient activation domain that, contrasting to Bradyrhizobium japonicum NifA (BjNifA), can activate in trans. To explore paths that lead to this enhanced activity, we mutagenized BjNifA, After three cycles of mutagenesis and selection, a highly active derivative was obtained. Strikingly, all mutations changed to amino acids already present in SmNifA. Our artificial process thus recreated the natural evolution followed by this protein and suggests that NifA is trapped in a restricted sequence space with very limited solutions for higher activity by point mutation MH - Germany MH - Mexico|Morelos PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000086195200065 L2 - ENHANCER-BINDING PROTEIN; KLEBSIELLA-PNEUMONIAE; TRANSCRIPTIONAL ACTIVATOR; POSITIVE CONTROL; DNA-BINDING; NIFA; PROMOTERS; RNA; LANDSCAPES; EXPRESSION SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(7):3314-3318 1017 UI - 16355 AU - Julien C AU - Haro-Poniatowski E AU - Camacho-Lopez MA AU - Escobar-Alarcon L AU - Jimenez-Jarquin J AD - Univ Paris 06, LMDH, UMR 7603, F-75252 Paris 05, FranceUniv Autonoma Metropolitana Iztapalapa, Lab Opt Cuant, Mexico City 09340, DF, MexicoInst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoJulien, C, Univ Paris 06, LMDH, UMR 7603, 4 Pl Jussieu, F-75252 Paris 05, France TI - Growth of LiMn2O4 thin films by pulsed-laser deposition and their electrochemical properties in lithium microbatteries AB - Films of LiMn2O4 were grown by pulsed-laser deposition (PLD) onto silicon wafers using sintered targets which consisted in the mixture of LiMn2O4 and Li2O powders. The film formation has been studied as a function of the preparation conditions, i.e. composition of the target, substrate temperature, and oxygen partial pressure in the deposition chamber. Composition, morphology and structural properties of PLD films have been investigated using Rutherford backscattering spectrocopy, scanning electron microscopy, X-ray diffraction and Raman scattering spectroscopy. The films deposited from target LiMn2O4 + 15% Li2O have an excellent crystallinity when deposited onto silicon substrate maintained at 300 degrees C in an oxygen partial pressure of 100 mTorr. It is found that such a film crystallizes in the spinel structure (Fd3m symmetry) as evidenced by X-ray diffraction. Well-textured polycrystalline films exhibit crystallite size of 300 nm. Pulsed-laser deposited LiMn2O4 thin films obtained with a polycrystalline morphology were successfully used as cathode materials in lithium microbatteries. The Li//LiMn2O4 thin film cells have been tested by cyclic voltammetry and galvanostatic charge-discharge techniques in the potential range 3.0-4.2 V. Specific capacity as high as 120 mC/cm(2) mu m was measured on polycrystalline Mms. The chemical diffusion coefficients for the LixMn2O4 thin films appear to be in the range of 10(-11)-10(-12) cm(2)/s. Electrochemical measurements show a good cycleability of PLD films when cells are charged-discharged at current densities of 5-25 mu A/cm(2). (C) 2000 Elsevier Science S.A. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 36 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000085966800008 L2 - lithium manganese spinel;pulsed-laser deposition;lithium microbatteries;SPINEL; LICOO2; CELLS; BATTERIES; SYSTEM SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2000 ;72(1):36-46 1018 UI - 16423 AU - Jun SY AU - Akchurin N AU - Andreev VA AU - Atamantchouk AG AU - Aykac M AU - Balatz MY AU - Bondar NF AU - Bravar A AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dreossi D AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Gerzon S AU - Giller I AU - Golovtsov VL AU - Goncharenko YM AU - Gottschalk E AU - Gouffon P AU - Grachov OA AU - Gulmez E AU - Iori M AU - Kamenski AD AU - Kangling H AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konigsmann K AU - Konorov I AU - Kozhevnikov AA AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Luksys M AU - Lungov T AU - Magarrel D AU - Maleev VP AU - Mao D AU - Masciocchi S AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - McKenna SL AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Mukhin VA AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Oleynik G AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Patrichev S AU - Penzo A AU - Petrenko SI AU - Pogodin P AU - Povh B AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Semyatchkin VK AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - Wenheng Z AU - You J AU - Yunshan L AU - Zhenlin M AU - Zhigang L AU - Funchal RZ AD - Ball State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, TurkeyCtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermi Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Tel Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Rome La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyCarnegie Mellon Univ, Pittsburgh, PA 15213, USAJun, SY, Carnegie Mellon Univ, Pittsburgh, PA 15213, USA TI - Observation of the Cabibbo-suppressed decay Xi(+)(c) -> pK(-)pi(+) AB - We report the first observation of the Cabibbo-suppressed charm baryon decay Xi(c)(+) --> pK(-)pi(+) We observe 150 +/- 22 +/- 5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Sigma(-) beam. The branching fractions of the decay relative to the Cabibbo-favored Xi(c)(+) --> Sigma(+)K(-)pi(+) and Xi(c)(+) --> Xi(-)pi(+)pi(+) are measured to be B(Xi(c)(+) --> pK(-)pi(+))/B(Xi(c)(+) --> Sigma(+)K(-)pi(+)) = 0.22 +/- 0.06 +/- 0.03 and B(Xi(c)(+) --> pK(-)pi(+))/B(Xi(c)(+) --> Xi(-)pi(+)pi(+)) = 0.20 +/- 0.04 +/- 0.02, respectively MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085588400003 L2 - BARYON DECAYS SO - Physical Review Letters 2000 ;84(9):1857-1861 1019 UI - 14315 AU - Jurado-Chichay Z AU - Walker GPL AD - Univ Hawaii, Dept Geol & Geophys, Honolulu, HI 96822, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, EnglandJurado-Chichay, Z, Univ Hawaii, Dept Geol & Geophys, 2525 Correa Rd, Honolulu, HI 96822 USA TI - Stratigraphy and dispersal of the Mangaone Subgroup pyroclastic deposits, Okataina Volcanic Centre, New Zealand AB - The Mangaone Subgroup from the Okataina Volcanic Centre consists of silicic plinian pyroclastic units that lie between the Oruanui deposit from the Taupo Volcanic Centre (corrected C-14 calendar age = 26.5 ka) and the Rotoiti (flow)Rotoehu (fall) deposits from Okataina Volcanic Centre (K-Ar age = 64 ka). In this study we present a new stratigraphy for the subgroup that is significantly revised from the earlier work and was developed after extensive held mapping and laboratory study. We now recognize and describe a total of 12 rhyolitic units las opposed to the 8 that had been recognized previously), with a total bulk eruptive volume of approximately 81 km(3). The vents for all the Mangaone Subgroup units were within the Haroharo caldera and possibly migrated through time, first within a roughly north-south trending zone in the central part of the caldera and then toward the eastern part of the caldera. We present new radiometric ages suggesting that the whole sequence was erupted in a relatively short time span (possibly 10-15 ka). Our findings of more eruptions in a shorter time span than in previous work underscores the utility of detailed field studies, particularly when volcanic hazards are being assessed. All the fall units have plinian dispersals but show various degrees of magma-water interaction. The majority of the eruptions were large and intense enough to generate pyroclastic flows, yet flows were observed in only 2 units and is volumetrically small. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000166971200017 L2 - Okataina Volcanic Centre;Mangaone Subgroup;silicic volcanism;pyroclastic deposits;plinian;FALLOUT TEPHRA VOLUMES; MOUNT ST-HELENS; TAUPO VOLCANO; ERUPTION; ZONE; IGNIMBRITES; DYNAMICS; CALDERA; AGE; THICKNESS SO - Journal of Volcanology and Geothermal Research 2000 ;104(1-4):319-383 1020 UI - 14509 AU - Jurado E AU - Aguirre O AU - Flores J AU - Navar J AU - Villalon H AU - Wester D AD - UANL AP 41, Fac Ciencias Forestales, Linares 67700, NL, MexicoInst Ecol AC, Xalapa 91000, Veracruz, MexicoTexas Tech Univ, Dept Range Wildlife & Fisheries Management, Lubbock, TX 79409, USAJurado, E, UANL AP 41, Fac Ciencias Forestales, Linares 67700, NL, Mexico TI - Germination in tamaulipan thornscrub of north-eastern Mexico AB - In semi-arid environments plants should be selected to germinate at times most suitable for seedling establishment. Germinability, rate of germination and temperature preference for germination (12 or 28 degreesC constant) were analysed with respect to growth form (grass, forb, woody), longevity and seed size. Short-lived species showed preferential germination at either high or low temperature, whereas long-lived species tended to be indifferent to season. Germinability was > 20% for 28 spp., 17 species were < 10% and 21 species did not germinate under any circumstances. Growth form or life-span did not influence germination. Woody species germinated rapidly. Germinability and germination rate were positively associated. (C) 2000 Academic Press MH - Mexico|Nuevo Leon MH - Mexico|Veracruz MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 9 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000166370400007 L2 - matorral;seed;dormancy;regeneration niche;NORTHEASTERN MEXICO; SOUTH TEXAS; TEMPERATURE; LEGUMES SO - Journal of Arid Environments 2000 ;46(4):413-424 1021 UI - 16173 AU - Juraszek SJ AU - Staveley-Smith L AU - Kraan-Korteweg RC AU - Green AJ AU - Ekers RD AU - Haynes RF AU - Henning PA AU - Kesteven MJ AU - Koribalski B AU - Price RM AU - Sadler EM AU - Schroder A AD - Univ Sydney, Sch Phys, Sydney, NSW 2006, AustraliaCSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, AustraliaUniv Guanajuato, Dept Astron, Guanajuato 36000, GTP, MexicoUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAObserv Cote Azur, F-06304 Nice 4, FranceJuraszek, SJ, Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia TI - A blind HI survey for galaxies in the zone of avoidance, 308 degrees <= l <= 332 degrees AB - We report on a blind neutral hydrogen survey for galaxies using the 21 cm multibeam receiver on the Parkes 64 m telescope. The surveyed region covers \b\ less than or equal to 5 degrees in the zone of avoidance (ZOA) from Galactic longitude 308 degrees to 332 degrees. The survey represents the first phase of a blind H I survey covering the southern ZOA (l = 212 degrees to 36 degrees). We have detected H I in 42 galaxies above a 3 sigma limit of 60 mJy. The galaxies detected in this survey have velocities out to 6000 km s(-1) and H I masses in the range 4 x 10(7) to 3 x 10(10)M. (h(75)(-2)). Only eight of the 42 galaxies have velocities previously measured. A further nine galaxies appear to have optical counterparts in the Woudt's 1998 catalog. In total, 16 of the galaxies appear to be associated with IRAS sources, although only three of these are without optical counterparts. The estimated median extinction for the 20 galaxies with optical or IR counterparts is A(B) = 3.8 mag. For the 22 galaxies with no counterparts, the estimated median extinction is A(B) = 5.6 mag. The distribution of galaxies is suggestive of a connection between the Centaurus supercluster above the Galactic plane and the Pavo-Indus supercluster beneath the plane. No previously hidden concentrations of galaxies were found MH - Australia MH - France MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000086508100009 L2 - galaxies : distances and redshifts;galaxies : fundamental parameters;radio emission lines;surveys;SOUTHERN MILKY-WAY; GALACTIC PLANE; IRAS GALAXIES; SEARCH; 230-DEGREES; REGION SO - Astronomical Journal 2000 ;119(4):1627-1637 1022 UI - 15763 AU - Kallberg ME AU - Brooks DE AU - Garcia-Sanchez GA AU - Komaromy AM AU - Szabo NJ AD - Univ Florida, Gainesville, FL, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - Endothelin-1 levels in the aqueous humor of dogs with glaucoma MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246701341 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S255-S255 1023 UI - 16111 AU - Kanbur Z AU - Louie JN AU - Chavez-Perez S AU - Plank G AU - Morey D AD - Univ Istanbul, Muhendisl Fak, Jeofiz Bolumu, Istanbul, TurkeyInst Mexicano Petr, Subdirecc Explorac & Prod, Mexico City 02670, DF, MexicoUniv Nevada, Seismol Lab, Reno, NV 89557, USAUniv Nevada, Dept Geol Sci, Reno, NV 89557, USAUniv Utah, Dept Geol & Geophys, Salt Lake City, UT 84112, USAKanbur, Z, Univ Istanbul, Muhendisl Fak, Jeofiz Bolumu, Istanbul, Turkey TI - Seismic reflection study of Upheaval Dome, Canyonlands National Park, Utah AB - The origin of Upheaval Dome, in Canyonlands National Park of southeastern Utah, has been a topic of controversy among geologists and planetary scientists. The structure has long been thought to have been created by salt diapirism from the underlying Paradox Formation. Recent studies have suggested that impact could have formed the dome. To test the various hypotheses, we acquired, processed, and interpreted seismic reflection data within and adjacent to the structure. Both conventionally stacked and prestack-migrated images show <100 m relief in the Paradox Formation, contrary to salt diapirism hypotheses. Further, we have identified features within the images typical of impact structures, such as listric normal faults having displacements toward the center of the dome. Deformation occurs in two depth ranges, with the faulting that created the central uplift appearing only above the Hermosa Formation, in the upper 800 m of the structure. The images also suggest limited fracturing of the Hermosa and salt flow in the Paradox Formation, perhaps due to gravitational relaxation of the crater form. Our image of a nearly flat top of the Paradox salt strongly favors an impact origin for Upheaval Dome MH - Mexico|Distrito Federal MH - Turkey MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000086590800006 L2 - IMPACT STRUCTURE SO - Journal of Geophysical Research-Planets 2000 ;105(E4):9489-9505 1024 UI - 15563 AU - Kaneko A AU - Kano M AU - Nakamura G AU - Rivera-Campo E AU - Tokunaga S AU - Urrutia J AD - Tokai Univ, Res Inst Educ Dev, Shibuya Ku, Tokyo 1510063, Japan. Kogakuin Univ, Dept Comp Sci & Commun Engn, Shinjuku Ku, Tokyo 15638677, Japan. Ibaraki Univ, Dept Comp & Informat Sci, Hitachi, Ibaraki 3168511, Japan. Univ Autonoma Metropolitana, Dept Metmat, Mexico City 09340, DF, Mexico. Tokyo Med & Dent Univ, Coll Liberal Arts & Sci, Chiba 2720827, Japan. Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Radial perfect partitions of convex sets in the plane AB - In this paper we study the following problem: how to divide a cake among the children attending a birthday party such that all the children get the same amount of cake and the same amount of icing. This leads us to the study of the following. A perfect k-partitioning of a convex set S is a partitioning of S into k convex pieces such that leach piece has the same area and 1/k of the perimeter of S. We show that for any k, any convex set admits a perfect k-partitioning. Perfect partitionings with additional constraints are also studied MH - Japan MH - Mexico|Distrito Federal T3 - DISCRETE AND COMPUTATIONAL GEOMETRYLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBQ47X AV - English IS - 0302-9743 UR - ISI:000088438400001 SO - 2000 ;():1-13 1025 UI - 14669 AU - Kaplan IG AU - Navarro O AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble, FranceKaplan, IG, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Statistics and properties of coupled hole pairs in superconducting ceramics AB - It is shown that in site representation the hole-pair operators obey the same commutation relations (paulionic) as the Cooper pair operators in impulse representation, although the latter describe delocalized quasiparticles. In quasi-impulse representation the hole-pair operators are also delocalized but the exact commutation relations correspond to a modified parafermi statistics [1] of rank N (N is the number of sites in a "superlattice" formed by the centers of mass of each hole pair). From this follows that one state can be occupied by up to N pairs. Even in the absence of dynamic interaction, the system of hole pairs is characterized by some immanent interaction, named after Dyson as kinematic interaction. This interaction appears because of the deviation of the quasiparticle statistics from the Bose (Fermi) statistics and its magnitude depends on the concentration of hole pairs. In spite of the non-bosonic behavior, there is no statistical prohibition on the Bose-Einstein condensation of coupled hole pairs MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855500070 L2 - TC SO - Physica C 2000 ;341():217-220 1026 UI - 15118 AU - Kaplan IG AU - Roszak S AU - Leszczynski J AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoJackson State Univ, Dept Chem, Computat Ctr Mol Struct & Interact, Jackson, MS 39217, USAWroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, PolandKaplan, IG, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - Nature of binding in the alkaline-earth clusters: Be-3, Mg-3, and Ca-3 AB - The study of the interaction energy and its many-body decomposition in a broad distance interval for the Be-n, Mg-n, and Ca-n (n=2,3) clusters at the SCF and MP4 levels are performed. A comparative analysis of the obtained results allows one to conclude that the only stabilization factor in the dimers is the dispersion forces. So, the alkaline-earth dimers can be attributed to the van der Waals molecules. The trimers are stabilized by the two-body localized dispersion forces and three-body delocalized exchange forces. The binding in the alkaline-earth trimers has a mixed physical (van der Waals) and chemical (nonadditive exchange) nature. An NBO population analysis reveals a relatively large p-population in all clusters. A surprisingly large p-population at the MP4 level is also obtained for the isolated atoms. (C) 2000 American Institute of Physics. [S0021- 9606(00)30333-6] MH - Mexico|Distrito Federal MH - Poland MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 19 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000089635200027 L2 - SMALL METAL-CLUSTERS; QUADRATIC CONFIGURATION-INTERACTION; SMALL BERYLLIUM CLUSTERS; ELECTRON CORRELATION; PERTURBATION-THEORY; MOLECULAR-INTERACTIONS; CORRELATION ENERGIES; MAGNESIUM CLUSTERS; WAVE-FUNCTIONS; HELIUM DIMER SO - Journal of Chemical Physics 2000 ;113(15):6245-6252 1027 UI - 15141 AU - Kathirithamby J AU - Moya-Raygoza G AD - Dept Zool, Oxford OX1 3PS, EnglandUniv Guadalajara, CUCBA, Dept Bot & Zool, Zapopan 45110, Jalisco, MexicoKathirithamby, J, Dept Zool, S Parks Rd, Oxford OX1 3PS, England TI - Halictophagus naulti sp n. (Strepsiptera : Halictophagidae), a new species parasitic in the corn leafhopper (Homoptera : Cicadellidae) from Mexico AB - A new species of Strepsiptera Halictophagus naulti (Halictophagidae) that is parasitic in the corn leaflhopper Dalbulus maidis (Delong & Wolcott) from the Mexican state of Morelos is described MH - United Kingdom MH - Mexico|Jalisco PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000089632300005 L2 - Halictophagus naulti;Dalbulus maidis;Strepsiptera;Halictophagidae;Homoptera;Cicadellidae;MAIZE; HOST SO - Annals of the Entomological Society of America 2000 ;93(5):1039-1044 1028 UI - 16200 AU - Katime I AU - de Apodaca ED AU - Mendizabal E AU - Puig JE AD - Univ Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, Bilbao 48990, SpainUniv Guadalajara, Ctr Univ Ciencias Exactas & Ingn, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoKatime, I, Avda Basagoiti 8-1C, Algorta 48990, Vizcaya, Spain TI - Acrylic acid/methyl methacrylate hydrogels. I. Effect of composition on mechanical and thermodynamic properties AB - The mechanical and thermodynamic properties of poly(acrylic acid-co-methyl methacrylate) hydrogels with varying ratios of AA/MMA are reported. Swelling capacity increases but elasticity decreases as the content of AA in the hydrogels increases. Thermodynamic analysis indicates that swelling is an unfavorable (Delta (G) over bar(1) > 0) and endothermic (Delta (H) over bar(1) > 0) process. Both thermodynamic quantities increase with increasing hydrophobic nature of the hydrogel. The amount of freezing and non-freezing water in the hydrogels was determined by DSC. The ratio of non freezing to total water content increases with the increasing hydrophobic nature of the hydrogels MH - Mexico|Jalisco MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 12 U4 - Polymer Science U5 - J;Article AV - English IS - 1060-1325 UR - ISI:000086380400001 L2 - hydrogel;mechanical properties;swelling;freezing;water;hydrophylic;hydrophobic;thermodynamic properties;SYNTHETIC HYDROGELS; WATER; STATES SO - Journal of Macromolecular Science-Pure and Applied Chemistry 2000 ;37(4):307-321 1029 UI - 14745 AU - Kausz AT AU - Obrador GT AU - Pereira BJG AD - New England Med Ctr, Dept Med, Div Nephrol, Boston, MA 02111, USAPanamerican Univ, Sch Med, Mexico City, DF, MexicoPereira, BJG, New England Med Ctr, Dept Med, Div Nephrol, 750 Washington St,Box 391, Boston, MA 02111 USA TI - Anemia management in patients with chronic renal insufficiency AB - The introduction of recombinant human erythropoietin (rHuEPO) more than a decade ago provided the first effective treatment for the anemia of chronic renal insufficiency(CRI), The use of rHuEPO in the treatment of anemia has been associated with partial regression of left ventricular hypertrophy among both dialysis and nondialysis patients, and has been shown to reduce the frequency of cardiac complications such as congestive heart failure and number of days of hospitalization among dialysis patients. Despite this evidence, the anemia of CRI remains highly prevalent, underrecognized, and undertreated. A number of considerations arise regarding the management of anemia among patients with CRI, in this article, we review the rationale for treatment of anemia, current management practices, proposed treatment strategies, and the economic implications of improved anemia treatment. (C) 2000 by the National Kidney Foundation, Inc MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 28 U4 - Urology & Nephrology U5 - J;Review AV - English IS - 0272-6386 UR - ISI:000165821400006 L2 - chronic renal insufficiency (CRI);recombinant human erythropoietin (rHuEPO);anemia;cardiovascular disease (CVD);management;RECOMBINANT-HUMAN-ERYTHROPOIETIN; LEFT-VENTRICULAR HYPERTROPHY; CHRONIC-HEMODIALYSIS PATIENTS; INTRAVENOUS IRON SUPPLEMENTATION; ISCHEMIC-HEART-DISEASE; PREDIALYSIS PATIENTS; DIALYSIS PATIENTS; BLOOD-PRESSURE; RECEIVING HEMODIALYSIS; CARDIOVASCULAR-DISEASE SO - American Journal of Kidney Diseases 2000 ;36(6):S39-S51 1030 UI - 14780 AU - Kausz AT AU - Obrador GT AU - Arora P AU - Ruthazer R AU - Levey AS AU - Pereira BJG AD - New England Med Ctr, Div Nephrol, Boston, MA 02111, USAPanamer Univ, Sch Med, Mexico City, DF, MexicoPereira, BJG, New England Med Ctr, Div Nephrol, Box 391,750 Washington St, Boston, MA 02111 USA TI - Late initiation of dialysis among women and ethnic minorities in the United States AB - The ideal timing of initiation of renal replacement (RRT) therapy has been debated. It is currently recommended that RRT be instituted once the GFR falls below 10.5 ml/min per 1.73m(2), unless edema-free body weight is stable or increased, the normalized protein nitrogen appearance rate is 0.8 g/kg per d or greater, and there are no clinical signs or symptoms of uremia. However, the mean estimated GFR at initiation of dialysis in the United States is 7.1 ml/min per 1.73m(2). Factors that are associated with timing of initiation of dialysis in the United States are not clear. A cross-sectional study was performed to determine the factors that are associated with late initiation of dialysis as defined by GFR at initiation of less than 5 ml/min per 1.73m(2) among patients who began dialysis in the United States between 1995 and 1997. Data were obtained from the U.S. Renal Data System, and GFR was estimated using the formula derived from the Modification of Diet in Renal Disease Study. Twenty-three percent of patients started dialysis late. In the multivariate analysis, women (odds ratio [OR] = 1.70), Hispanics and Asians (OR = 1.47 and 1.66, respectively, compared with Caucasians), uninsured patients (OR = 1.55 compared with private insurance), and employed patients (OR = 1.20) were more likely to start dialysis late. Patients with diabetes, cardiac disease, peripheral vascular disease, and poor functional status were less likely to start dialysis late compared with patients without these comorbid conditions. Certain nonclinical patient characteristics, notably female gender, race, and lack of insurance, are related to an increased likelihood of late initiation of dialysis. These factors may reflect reduced access to care. Additional studies are indicated to determine the potential impact of reduced access to care and whether late initiation of dialysis results in adverse clinical and economic outcomes among patients with end-stage renal disease in the United States MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 39 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000165595600019 L2 - STAGE RENAL-DISEASE; RACIAL VARIATION; PERITONEAL-DIALYSIS; BODY-COMPOSITION; INSURANCE STATUS; POPULATION; GENDER; TRANSPLANTATION; DISPARITY; SURVIVAL SO - Journal of the American Society of Nephrology 2000 ;11(12):2351-2357 1031 UI - 15289 AU - Kazankov GM AU - Sergeeva VS AU - Efremenko EN AU - Alexandrova L AU - Varfolomeev SD AU - Ryabov AD AD - Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaUNAM, Inst Invest Mat, Mexico City, DF, MexicoRyabov, AD, Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia TI - Highly efficient degradation of thiophosphate pesticides catalyzed by platinum and palladium aryl oxime metallacycles MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 35 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1433-7851 UR - ISI:000089227800028 L2 - ESTER HYDROLYSIS; COMPLEX; CLEAVAGE; METALLOENZYMES; REACTIVITY; PROMOTION; HYDROXIDE; BASICITY SO - Angewandte Chemie-International Edition 2000 ;39(17):3117-3119 1032 UI - 14781 AU - Kelly R AU - Favela J AU - Ibarra JM AU - Bassi D AD - CICESE, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoInst Politecn Nacl, Dept Automat Control, CINVESTAV, Lab Robot & Vis, Mexico City 07000, DF, MexicoUniv Santiago Chile, Dept Ingn Informat, Santiago, ChileKelly, R, CICESE, Div Fis Aplicada, AP 2615,Adm 1, Ensenada 22800, Baja California, Mexico TI - Asymptotically stable visual servoing of manipulators via neural networks AB - In this article we present a class of position control schemes for robot manipulators based on feedback of visual information processed through artificial neural networks. We exploit the approximation capabilities of neural networks to avoid the computation of the robot inverse kinematics as well as the inverse task space-camera mapping which involves tedious calibration procedures. Our main stability result establishes rigorously that in spite of the neural network giving an approximation of these mappings, the closed-loop system including the robot nonlinear dynamics is locally asymptotically stable provided that the Jacobian of the neural network is nonsingular. The feasibility of the proposed neural controller is illustrated through experiments on a planar robot. (C) 2000 John Wiley & Sons, Inc MH - Chile MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Robotics U5 - J;Article AV - English IS - 0741-2223 UR - ISI:000165644500002 L2 - ROBOT MANIPULATORS; CAMERA CALIBRATION; PLANAR ROBOTS; CONTROLLER; FRAMEWORK SO - Journal of Robotic Systems 2000 ;17(12):659-669 1033 UI - 16328 AU - Kelly R AU - Carelli R AU - Nasisi O AU - Kuchen B AU - Reyes F AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Nacl San Juan, Inst Automat, RA-5400 San Juan, ArgentinaUniv A Puebla, Puebla 72001, MexicoKelly, R, Ctr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, Mexico TI - Stable visual servoing of camera-in-hand robotic systems AB - In this paper, the control problem of camera-in-hand robotic systems is considered. In this approach, a camera is mounted on the robot, usually at the hand, which provides an image of objects located in the robot environment. The aim of this approach is to move the robot arm in such a way that the image of the objects attains the desired locations. We propose a simple image-based direct visual servo controller which requires knowledge of the objects' depths, but it does not need to use the inverse kinematics and the inverse Jacobian matrix. By invoking the Lyapunov direct method, we show that the overall closed-loop system is stable and, under mild conditions on the Jacobian, local asymptotic stability is guaranteed. Experiments with a two degrees-of-freedom direct-drive manipulator are presented to illustrate the controller's performance MH - Argentina MH - Mexico|Baja California MH - Mexico|Puebla PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 24 U4 - Automation & Control Systems;Engineering, Manufacturing;Engineering, Electrical & Electronic;Engineering, Mechanical U5 - J;Article AV - English IS - 1083-4435 UR - ISI:000086068800007 L2 - control of robots;Lyapunov stability;regulation;transpose Jacobian control;visual servoing;STEREO VISION; FEEDBACK; MANIPULATORS; FEATURES SO - Ieee-Asme Transactions on Mechatronics 2000 ;5(1):39-48 1034 UI - 15509 AU - Kepley CL AU - Cambier JC AU - Morel PA AU - Lujan D AU - Ortega E AU - Wilson BS AU - Oliver JM AD - Univ New Mexico, Hlth Sci Ctr, Dept Pathol, Albuquerque, NM 87131, USANatl Jewish Med & Res Ctr, Denver, CO, USAUniv Pittsburgh, Dept Med, Pittsburgh, PA 15260, USAUNAM, Inst Invest Biomed, Dept Immunol, Mexico City, DF, MexicoKepley, CL, Cell Pathol Labs, CRF 203,2325 Camino Salud, Albuquerque, NM 87131 USA TI - Negative regulation of Fc epsilon RI signaling by Fc gamma RII costimulation in human blood basophils AB - Background: Signaling through the antigen receptors of human B and T cells and the high-affinity IgE receptor Fc epsilon RI of rodent mast cells is decreased by cross-linking these receptors to the low-affinity Ige receptor Fc gamma RII, The inhibition is thought to involve the tyrosine phosphorylation of immunoreceptor tyrosine-based inhibitory motifs (ITIMs) in the Fc gamma RIIB cytoplasmic tail, creating binding sites For SH2-containing protein (Src homology domain containing protein tyrosine phosphatase 1 and 2 [SHP-1, SHP-2]) and/or lipid (SH2 domain-containing polyphosphatidylinositol 5-phosphatase) phosphatases that oppose activating signals from the costimulated antigen receptors, Objective: In human basophils and mast cells Fc epsilon RI signaling generates mediators and cytokines responsible for allergic inflammation. We proposed to determine whether Fc epsilon RI signaling is inhibited by Fc gamma RII costimulation in human basophils and to explore the underlying mechanism as an approach to improving the treatment of allergic inflammation. Methods: Fc gamma R expression on human basophils was examined using flow cytometry and RT-PCR analysis. Fc gamma RII/Fc epsilon RI costimulation was typically accomplished by priming cells with anti-dinitrophenol (DNP) IgE and anti-DNP Ige and stimulating with DNP-BSA. Phosphatases were identified by Western blotting, and their partitioning between membrane and cytosol was determined by cell fractionation, Biotinylated synthetic peptides and phosphopeptides corresponding to the Fc gamma RIIB ITIM sequence were used for adsorption assays. Results: We report that peripheral blood basophils express Fc gamma RII (in both the ITIM-containing Fc gamma RIIB and the immunoreceptor tyrosine-based activation motif-containing Fc gamma RIIA forms) and that costimulating Fc gamma RII and Fc epsilon RI inhibits basophil Fc epsilon RI-mediated histamine release, IL-4 production, and Ca2+ mobilization, The inhibition of basophil Fc epsilon RI signaling by Fc gamma RII/Fc epsilon RI costimulation is linked to a significant decrease in Syk tyrosine phosphorylation, Human basophils express all 3 SH2-containing phosphatases. Conclusions: Evidence that Fc gamma RII/Fc epsilon RI costimulation induces SHP-1 translocation from the cytosolic to membrane fractions of basophils and that biotinylated synthetic peptides corresponding to the phosphorylated Fc gamma RIIB ITIM sequence specifically recruit SHP-1 from basophil Lysates particularly implicates this protein phosphatase in the negative regulation of Fc epsilon RI signaling by costimulated Fc gamma RII MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 45 U4 - Allergy;Immunology U5 - J;Article AV - English IS - 0091-6749 UR - ISI:000088708100018 L2 - human;mast cell;basophil;signal transduction;Fc receptors;allergy;Fc epsilon RI;MAST-CELL ACTIVATION; TYROSINE-PHOSPHATASE SHP-1; INHIBITORY RECEPTOR; B-CELLS; IGE; ANTIGEN; KINASE; SYK; ASSOCIATION; RECRUITMENT SO - Journal of Allergy and Clinical Immunology 2000 ;106(2):337-348 1035 UI - 15784 AU - Kepley CL AU - Cambier JC AU - Lujan D AU - Ortega E AU - Morel PA AU - Wilson BS AU - Oliver JM AD - Univ New Mexico, Albuquerque, NM 87131, USANatl Jewish Hosp, Denver, CO, USAUNAM, Inst Invest Biomed, Mexico City, DF, MexicoUniv Pittsburgh, Dept Med, Pittsburgh, PA, USA TI - Negative regulation of Fc epsilon RI signaling by co-crosslinking to Fc gamma RII in human blood basophils MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000086643101956 SO - Faseb Journal 2000 ;14(6):A1245-A1245 1036 UI - 15290 AU - Keppie JD AU - Krogh TE AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoRoyal Ontario Museum, Toronto, ON MS5 2C6, CanadaKeppie, JD, Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - 440 Ma igneous activity in the Meguma terrane, Nova Scotia, Canada: Part of the Appalachian overstep sequence? AB - Abraded zircons from the basal rhyolitic tuff member of the White Rock Formation, which disconformably overlies the Cambrian-Early Ordovician Meguma Group, have yielded a nearly concordant U-Pb of 442 +/- 4 Ma interpreted as the age of extrusion. This age straddles the similar to 443 Ma Ordovician-Silurian boundary. Abraded zircons from the Brenton granite lie on a chord with an upper intercept age of 439 +4/-3 Ma, which is intepreted to be the age of intrusion, thus supporting its inferred subvolcanic nature. On the other hand, monazite from the Brenton pluton yielded a nearly concordant analysis with a Pb-207/Pb-206 age of 380 +/- 3 Ma,which is interpreted to be the time of the low pressure, high temperature metamorphism. Using these new data, the following observations suggest that the Meguma and Avalon terranes were neighbors during the Silurian-Early Devonian: (1) both have latest Ordovician-earliest Silurian, bimodal, subaerial, alkalic-tholeiitic, rift-related, volcanic rocks with Nd signatures indicating a similar continental basement source; (2) both show a similar progression of depositional environments: subaerial in the earliest Silurian, progressively deeper-water marine strata in the Llandovery and Wenlock, switching to gradually shallowing marine environments in the Ludlow, and reverting to subaerial in the Pragian; and (3) both contain Rhenish-Bohemian Early Devonian fauna. Furthermore, the southeast to northwest transition from an offshore sandbar to a beach sand in the Silurian White Rock Formation suggests the presence of land to the north, now recognized as Avalonia. These conclusions support published suggestions that the Siluro-Devonian successions in the Meguma and Avalon terranes form part of the overstep sequence that extends across most of the northern Appalachians. Published data indicate that Avalonia was adjacent to Gondwana in the Neoproterozoic, that it separated from Gondwana in the Early Ordovician, and was accreted to eastern Laurentia in the Late Ordovician-Early Silurian. On the basis of the data and correlations presented here, we suggest that the Meguma Terrane travelled with Avalonia This is consistent with the absence of a phase of deformation between the Cambro-Ordovician Meguma Group and the Silurian White Rock Formation MH - Canada MH - Mexico|Distrito Federal PB - NEW HAVEN: KLINE GEOLOGY LABORATORY RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0002-9599 UR - ISI:000089306400004 L2 - PB ZIRCON AGES; LITHOTECTONIC ZONE; AR-40/AR-39; CONSTRAINTS; EVOLUTION; GEOCHRONOLOGY; NEWFOUNDLAND; ACCRETION; ROCKS; MODEL SO - American Journal of Science 2000 ;300(6):528-538 1037 UI - 15882 AU - Keppie JD AU - Dostal J AU - Dallmeyer RD AU - Doig R AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaUniv Georgia, Dept Geol, Athens, GA 30602, USAMcGill Univ, Dept Geol, Montreal, PQ H3A 2A7, CanadaKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Superposed Neoproterozoic and Silurian magmatic arcs in central Cape Breton Island, Canada: geochemical and geochronological constraints AB - Isotopic and geochemical data indicate that intrusions in the eastern Creignish Hills of central Cape Breton Island, Canada represent the roots of arcs active at similar to 540-585 Ma and similar to 440 Ma. Times of intrusion are closely dated by (1) a nearly concordant U-Pb zircon age of 553 +/- 2 Ma in diorites of the Creignish Hills pluton; (2) a lower intercept U-Pb zircon age of 540 +/- 3 Ma that is within analytical error of Ar-40/Ar-39 hornblende plateau isotope-correlation ages of 545 and 550 +/- 7 Ma in the River Denys diorite; and (3) an upper intercept U-Pb zircon age of 586 +/- 2 Ma in the Melford granitic stock. On the other hand, similar to 441-455 Ma Ar-40/Ar-39 muscovite plateau ages in the host rock adjacent to the Skye Mountain granite provide the best estimate of the time of intrusion, and are consistent with the presence of granitic dykes cutting the Skye Mountain gabbro-diorite previously dated at 438 +/- 2 Ma. All the intrusions are calc-alkaline; the Skye Mountain granite is peraluminous. Trace element abundances and Nb and Ti depletions of the intrusive rocks are characteristic of subduction-related rocks. The similar to 540-585 Ma intrusions form part of an extensive belt running across central Cape Breton Island, and represent the youngest Neoproterozoic are magmas in this part of Avalonia. Nearby, they are overlain by Middle Cambrian units containing rift-related volcanic rocks, which bracket the transition from convergence to extension between similar to 540 and 505/520 Ma. This transition varies along the Avalon are: 590 Ma in southern New England, 560-538 Ma in southern New Brunswick, and 570 Ma in eastern Newfoundland. The bi-directional diachronism in this transition is attributed to northwestward subduction of two mid-ocean ridges bordering an oceanic plate, and the migration of two ridge-trench-transform triple points. Following complete subduction of the ridges, remnant mantle upwelling along the subducted ridges produced uplift, gravitational collapse and the high-temperature/low-pressure metamorphism in the are in both southern New Brunswick and central Cape Breton Island. The similar to 440 Ma are magmatism in the Creignish Hills extends through the Cape Breton Highlands and into southern Newfoundland, and has recently been attributed to northwesterly subduction along the northern margin of the Rheic Ocean MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7568 UR - ISI:000087547100003 L2 - AVALON COMPOSITE TERRANE; SOUTHERN NEW-BRUNSWICK; AR-40/AR-39 MINERAL AGES; NOVA-SCOTIA; U-PB; TECTONIC IMPLICATIONS; BROOKVILLE GNEISS; VOLCANIC-ROCKS; TECTONOTHERMAL EVOLUTION; AMPHIBOLE FRACTIONATION SO - Geological Magazine 2000 ;137(2):137-153 1038 UI - 16359 AU - Kerner R AU - Naumis GG AD - Univ Paris 06, Lab GCR, CNRS, URA 769, F-75252 Paris 05, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoKerner, R, Univ Paris 06, Lab GCR, CNRS, URA 769, Tour 21,Boite 142,4 Pl Jussieu, F-75252 Paris 05, France TI - Stochastic matrix description of the glass transition AB - We present a model of the glass transition viewed as the agglomeration and growth of clusters forming a covalent network. The creation of new layers of atoms on the rims of the clusters is treated in a probabilistic way as a linear transformation (encoded in what is called a stochastic matrix) of a vector whose components represent the probability distribution of various sites found on the rim. The asymptotic limit of the statistics of sites in the network is given by the matrix eigenvector with eigenvalue equal to one. The model reproduces the modified Gibbs-DiMarzio equation with a system parameter that is comparable to the one observed experimentally for many chalcogenide glasses. Some other features of the glass transition process, like the form of the specific heat, are also obtained MH - France MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000085923700011 L2 - CHALCOGENIDE GLASSES; BOROXOL RINGS; TEMPERATURE SO - Journal of Physics-Condensed Matter 2000 ;12(8):1641-1648 1039 UI - 15067 AU - Keymer JE AU - Marquet PA AU - Velasco-Hernandez JX AU - Levin SA AD - Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544, USAPontificia Univ Catolica Chile, Dept Ecol, Santiago, ChileUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoKeymer, JE, Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA TI - Extinction thresholds and metapopulation persistence in dynamic landscapes AB - Models of metapopulations have focused on the effects of extinction and colonization rate upon metapopulation persistence and dynamics, assuming static landscapes wherein patches are neither created nor go extinct. However, for species living in ephemeral (patchy) habitats, landscapes are highly dynamic rather than static. In this article, we develop a lattice metapopulation model, of the patch occupancy type, based on interacting particle systems that incorporate explicitly both metapopulation and patch dynamics. Under this scenario, we study the effects of different regimes of patch dynamics upon metapopulation persistence. We analyze the lattice behavior by numerical simulations and a mean field approximation (MF). We show that metapopulation persistence and extinction are strongly influenced by the rate at which the landscape changes, in addition to the amount of habitat destroyed. We derive MF analytical expressions for extinction thresholds related to landscape properties such as habitat suitability and patch average lifetime. Using numerical simulations, we also show how these thresholds are quantitatively overestimated by the ME equations, although the qualitative behavior of the spatial model is well explained by the MF when the array of habitat patches is dynamic or static but connected in space and time. The implications for conservation are also discussed MH - Chile MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 82 U4 - Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0003-0147 UR - ISI:000089948600002 L2 - patch dynamics;metapopulation persistence;interacting particle systems;extinction thresholds;habitat fragmentation;environmental heterogeneity;SPATIALLY EXPLICIT MODELS; HABITAT DESTRUCTION; COMPETITIVE COEXISTENCE; POPULATION-DYNAMICS; COMMUNITY STRUCTURE; PATCHY ENVIRONMENT; FRACTAL LANDSCAPES; PATTERN-FORMATION; FRAGMENTATION; DISTURBANCE SO - American Naturalist 2000 ;156(5):478-494 1040 UI - 15948 AU - Kharisov BI AU - Mendes-Rokhas MA AU - Ganich EA AD - Nuevo Leon Autonomous Univ, Monterrey, MexicoTexas Christian Univ, Ft Worth, TX 76129, USAMoscow State Univ, Moscow 119899, RussiaKharisov, BI, Nuevo Leon Autonomous Univ, Monterrey, Mexico TI - Traditional and electrochemical methods of synthesizing phthalocyanines and metal complexes on their base. Solvent effect AB - A comparative analysis is carried out for the traditional and electrochemical methods of synthesizing phthalocyanines and metal complexes on their base from various precursors and metal salts. The nature of a nonaqueous solvent is shown to be a highly important factor controlling the reaction pathway and the yield of the target products. The synthesis of phthalocyanines with the UV activation of the reaction mixture is discussed. The methods of synthesizing lanthanide and actinide phthalocyanines and substituted phthalocyanines are briefly reviewed MH - Mexico|Nuevo Leon MH - Russia MH - USA PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 1070-3284 UR - ISI:000087224700001 L2 - COORDINATION-COMPOUNDS; MOLECULAR SEMICONDUCTOR; ELECTROSYNTHESIS; METALLOPHTHALOCYANINES; LANTHANIDES; PORPHYRINS; FILMS SO - Russian Journal of Coordination Chemistry 2000 ;26(5):301-310 1041 UI - 15169 AU - Kiipli T AU - Batchelor RA AU - Bernal JP AU - Cowing C AU - Hagel-Brunnstrom M AU - Ingham MN AU - Johnson D AU - Kivisilla J AU - Knaack C AU - Kump P AU - Lozano R AU - Michiels D AU - Orlova K AU - Pirrus E AU - Rousseau RM AU - Ruzicka J AU - Sandstrom H AU - Willis JP AD - Tallinn Tech Univ, Min Inst, EE-10412 Tallinn, EstoniaTallinn Tech Univ, Inst Geol, EE-10412 Tallinn, EstoniaUniv St Andrews, Sch Geog & Geosci, St Andrews KY16 9ST, Fife, ScotlandNatl Autonomous Univ Mexico, Fac Quim, Unidad Serv Apoyo Invest, Mexico City 04510, DF, MexicoBritish Geol Survey, Nottingham NG12 3LJ, EnglandGeol Survey Finland, FIN-02150 Espoo, FinlandWashington State Univ, Dept Geol, Geoanalyt Lab, Pullman, WA 99164, USAGeol Survey Estonia, EE-12618 Tallinn, EstoniaJozef Stefan Inst, Ljubljana 1000, SloveniaNatl Autonomous Univ Mexico, Inst Geol, Lab Rayos X, Mexico City 04510, DF, MexicoRD Ctr, Analyt Chem Lab, B-6040 Jumet, BelgiumGeol Survey Canada, Ottawa, ON K1A 0E8, CanadaCAMET Res Inc, Goleta, CA 93117, USAUniv Cape Town, Dept Geol Sci, ZA-7700 Rondebosch, South AfricaKiipli, T, Tallinn Tech Univ, Min Inst, 82 Kopli St, EE-10412 Tallinn, Estonia TI - Seven sedimentary rock reference samples from Estonia AB - The major oxide and trace element compositions of seven sedimentary rock reference samples (claystone, organic-rich argillite, two limestones, dolostone, sandstone and feldspathized volcanic ash) are presented. Among studied samples the organic-rich argillite ("Dictyonema shale") is conspicuous for wide range of chemical elements with higher contents than in common sedimentary rocks. The content of 68 elements and components has been determined MH - Belgium MH - Canada MH - United Kingdom MH - Estonia MH - Finland MH - Mexico|Distrito Federal MH - Slovenia MH - South Africa MH - USA PB - TALLINN: ESTONIAN ACADEMY PUBLISHERS RP - NOT IN FILE U3 - TC 3 U4 - Energy & Fuels;Engineering, Petroleum U5 - J;Article AV - English IS - 0208-189X UR - ISI:000089484500002 SO - Oil Shale 2000 ;17(3):215-223 1042 UI - 16292 AU - Kim J AU - Franco J AU - Hong SS AU - Santillan A AU - Martos MA AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoSeoul Natl Univ, Dept Astron, Seoul 151742, South KoreaNatl Autonomous Univ Mexico, DGSCA, Mexico City 04510, DF, MexicoKorea Astron Observ, Yusong Ku, Taejon 305348, South KoreaKim, J, Korea Astron Observ, Yusong Ku, 61-1 Hwaam Dong, Taejon 305348, South Korea TI - The Parker instability in a thick Galactic gaseous disk. I. Linear stability analysis and nonlinear final equilibria AB - A linear stability analysis of a multicomponent and magnetized Galactic disk model is presented. The disk model uses the observed stratifications for the gas density and gravitational acceleration at the solar neighborhood, and in this sense it can be called a realistic model. The distribution of the total gas pressure is defined by these observed stratifications, and the gaseous disk is assumed isothermal. The initial magnetic field is taken parallel to the disk, with a midplane value of 5 mu G, and its stratification along the z-axis is derived from the condition of magnetohydrostatic equilibrium in an isothermal atmosphere. The resulting isothermal sound speed is similar to 8.4 km s(-1), similar to the velocity dispersion of the main gas components within 1.5 kpc from the midplane. The thermal-to-magnetic pressure ratio decreases with Ttl, and the warm model is Parker unstable. The dispersion relations show that the fastest growing mode has a wavelength of about 3 kpc, for both symmetric and antisymmetric perturbations, and the corresponding growth timescales are of about 3 x 10(7) yr. The structure of the final equilibrium stage is also derived, and we find that the midplane antisymmetric (MA) mode gathers more gas in the magnetic valleys. The resulting MA gas condensations have larger densities, and the column density enhancement is a factor of about 3 larger than the value of the initial stage. The unstable wavelengths and growth times for the multicomponent disk model are substantially larger than those of a thin-disk model, and some of the implications of these results are discussed MH - Mexico|Distrito Federal MH - South Korea PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086201300027 L2 - instabilities;ISM : clouds;ISM : magnetic fields;ISM : structure;MHD;MAGNETIC-FIELD; HYDROSTATIC EQUILIBRIUM; GRAVITATIONAL-FIELDS; INTERSTELLAR GAS; MASS DENSITY; GALAXY; HALO; EMISSION; ROTATION; SUN SO - Astrophysical Journal 2000 ;531(2):873-882 1043 UI - 16317 AU - Kimizuka N AU - Brown F AU - Flores MJR AU - Nakamura M AU - Michiue Y AU - Mohri T AD - Univ Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoNatl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, JapanKimizuka, N, Univ Sonora, Dept Invest Polimeros & Mat, Rosales S-N, Hermosillo 83000, Sonora, Mexico TI - The phase relations in the system In2O3-TiO2-MgO at 1100 and 1350 degrees C AB - The phase relations in the system In2O3-TiO2-MgO at 1100 and 1350 degrees C are determined by a classical quenching method. In this system, there are four pseudobinary compounds, In2TiO5, MgTi2O5 (pseudobrookite type), MgTiO3 (ilmenite type), and Mg2TiO4 (spinel type) at 1100 degrees C, At 1350 degrees C, in addition to these compounds there exist a spinel-type solid solution Mg(2-x)In(2)xTi(1-x)O(4) (0 less than or equal to x less than or equal to 1) and a compound In6Ti6MgO22 with lattice constants a = 5.9236(7) Angstrom, b = 3.3862(4) Angstrom c = 6.3609(7) Angstrom, beta = 108,15(1)degrees, and q = 0.369, which is isostructural with the monoclinic In3Ti2FeO10 in the system In2O3-TiO2-MgO. The relation between the lattice constants of the spinel phase and the composition nearly satisfies Vegard's law. In6Ti6MgO22 extends a solid solution range to In20Ti17Mg3O67 with lattice constants of a = 5.9230(5) Angstrom, b = 3.3823(3) Angstrom, c = 6.3698(6) Angstrom, beta = 108.10(5)degrees, and q = 0.360. The distributions of constituent cations in the solid solutions are discussed in terms of their ionic radius and site preference effect. (C) 2000 Academic Press MH - Japan MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000085978100005 L2 - phase relations;In6Ti6MgO22;MgIn2O4;In3Ti2FeO10;InFeO3;pyrochlore-type;HOMOLOGOUS COMPOUNDS; SPINEL SO - Journal of Solid State Chemistry 2000 ;150(2):276-280 1044 UI - 16166 AU - Kinsland GL AU - Hurtado M AU - Pope KO AD - Univ Louisiana, Dept Geol, Lafayette, LA 70501, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoGeo Eco Arc Res, Washington, DC 20001, USAKinsland, GL, Univ Louisiana, Dept Geol, Lafayette, LA 70501, USA TI - Detection of groundwater conduits in limestones with gravity surveys: Data from the area of the Chicxulub Impact Crater, Yucatan Peninsula, Mexico AB - Small negative gravity anomalies are found in gravity data from along the northwestern shoreline of the Yucatan Peninsula These anomalies are shown to be due to elongate, shallow anomalous porosity zones in-the Tertiary carbonates. These zones are caused primarily by groundwater solution and are presently active conduits for groundwater flow. The association of these small gravity anomalies with known topographic and structural features of the area, which partially overlies the Chicxulub Impact crater, indicates their development was influenced by structures, faults and/or fractures, within the Tertiary and pre-Tertiary carbonates MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000086534700036 L2 - SIZE; CENOTES SO - Geophysical Research Letters 2000 ;27(8):1223-1226 1045 UI - 15078 AU - Kir'yanov AV AU - Aboites V AU - Mel'nikov IV AD - Ctr Invest Opt AC, Guanajuato 37000, MexicoEcole Natl Super Sci Appl & Technol, Lab Optron, F-22305 Lannion, FranceRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaMel'nikov, IV, Ctr Invest Opt AC, Apartado Postal 948, Guanajuato 37000, Mexico TI - Second-harmonic generation by Nd3+: YAG/Cr4+: YAG-laser pulses with changing state of polarization AB - We describe the passive Q-switching regime of a neodymium laser that contains a Cr4+:YAG saturable absorber inside the cavity. Two cofigurations of the laser cavity are modeled: the cavity containing a partial polarizer as an additional unit and the microchip laser cavity in which the functions of an active element and saturable absorber are combined in a single piece of a Nd3+:YAG/Cr4+:YAG crystal with reflecting facets. It is shown that both lasers are able to generate a giant pulse with a changing state of polarization. Both the kinetics of the state of polarization of the pulse and its impact on second-harmonic generation are treated numerically. We find that the up-conversion efficiency can be enhanced and that harmonic-pulse compression can be obtained by means of the proper orientations of the intracavity polarizing elements, for the first configuration, or by choosing the polarization of the longitudinal pump and angular orientation of the doubling crystal, for the second one. The ability of the doubling crystal to analyze the state of polarization of pulses with nonlinearly changing polarization is discussed. (C) 2000 Optical Society of America MH - France MH - Mexico|Guanajuato MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000089832400001 L2 - CR4+YAG SATURABLE ABSORBERS; PUMPED NEODYMIUM LASERS; MICROCHIP ND3+YAG LASER; CRYSTAL SWITCH; PASSIVE SWITCH; ABSORPTION; MODE; CONVERSION; OSCILLATOR; ANISOTROPY SO - Journal of the Optical Society of America B-Optical Physics 2000 ;17(10):1657-1664 1046 UI - 16059 AU - Kir'yanov AV AU - Mel'nikov IV AU - Wagner K AD - Ctr Invest Opt, Leon 37000, GTO, MexicoEcole Natl Super Sci Appl & Technol, Lab Optron, F-22305 Lannion, FranceUniv Colorado, Dept Elect & Comp Engn, Boulder, CO 80309, USAKir'yanov, AV, Ctr Invest Opt, AC Apartado Postal 1-948, Leon 37000, GTO, Mexico TI - Two-color generation in a rare-earth-doped quasiphase-matched structure AB - A numerical study of two-color operation of quasiphase-matched structure in the lasing regime is presented for the case when a 980 nm pump produces the output both at 1550 and 775 nm. Successful operation of the two-color device relies on the use of a novel gain medium which consists of diode-pumped high-density rare-earth ions and on the utilization of a saturable amplification and absorption in the pumped and unpumped section of the device, correspondingly. (C) 2000 American Institute of Physics. [S0003-6951(00)03820-1] MH - France MH - Mexico|Guanajuato MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000086970600006 L2 - 2ND-HARMONIC GENERATION; LASER-DIODE; WAVE-GUIDE SO - Applied Physics Letters 2000 ;76(20):2829-2831 1047 UI - 16104 AU - Kir'yanov AV AU - Barmenkov YO AU - Starodumov AN AU - Leppanen VP AU - Vanhanen J AU - Jaaskelainen T AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Joensuu, Dept Phys, FIN-80101 Joensuu, FinlandBarmenkov, YO, Ctr Invest Opt, Loma Bosque 115,Col Lomas del Campestre, Leon 37150, Gto, Mexico TI - Application of the Z-scan technique to a saturable photorefractive medium with the overlapped ground and excited state absorption AB - Z-scan technique is applied to a saturable medium described by a generalized three-level scheme of photoexcitation in the condition of overlapping spectra of the ground and excited states. Correctness of the Z-scan data interpretation is analyzed in the framework of the model. The approach is applied for measuring the refractive indices Delta n(0) and n(2) in polymer films containing bacteriorhodopsin. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Finland MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000086577200051 L2 - Z-scan;nonlinear saturable media;CHEMICALLY ENHANCED BACTERIORHODOPSIN; FILMS; MEMBRANE; CRYSTAL; BEAMS SO - Optics Communications 2000 ;177(1-6):417-423 1048 UI - 16155 AU - Kir'yanov AV AU - Aboites V AU - Il'ichev NN AD - Ctr Invest Opt AC, Leon 37000, GTO, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaKir'yanov, AV, Ctr Invest Opt AC, Apartado Postal 948, Leon 37000, GTO, Mexico TI - Neodymium laser Q-switched with a Cr4+ : YAG crystal: Control over polarization state by exterior weak resonant radiation AB - Polarization bistability is investigated theoretically in a Nd :YAG laser passively e-switched with a Cr4+ :YAG crystal under the weak resonant exterior radiation control MH - Mexico|Guanajuato MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000086554400014 L2 - ABSORPTION; ANISOTROPY SO - Laser Physics 2000 ;10(2):461-466 1049 UI - 16619 AU - Kir'yanov AV AU - Aboites V AU - Il'ichev NN AD - Ctr Invest Opt AC, Guanajuato 37000, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaKir'yanov, AV, Ctr Invest Opt AC, Apartado Postal 948 Leon, Guanajuato 37000, Mexico TI - Analysis of a large-mode neodymium laser passively Q switched with a saturable absorber and a stimulated-Brillouin-scattering mirror AB - A neodymium laser passively Q switched with a saturable absorber and a stimulated-Brillouin-scattering mirror is numerically studied. An explanation is given for the laser beam spot-size widening. It is shown that this phenomenon is, most probably, due to nonperfect phase conjugation that occurs during the stimulated-Brillouin-scattering process through switching by intracavity radiation. The results of numerical simulation of the laser that account for this phenomenon are compared with experiment. It is demonstrated that the calculated output energy and pulse duration are in good agreement with those measured experimentally. (C) 2000 Optical Society of America MH - Mexico|Guanajuato MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000084782800003 L2 - PHASE SO - Journal of the Optical Society of America B-Optical Physics 2000 ;17(1):11-17 1050 UI - 16158 AU - Kirber MT AU - Guerrero-Hernandez A AU - Bowman DS AU - Fogarty KE AU - Tuft RA AU - Singer JJ AU - Fay FS AD - Univ Massachusetts, Sch Med, Dept Physiol, Worcester, MA 01655, USAUniv Massachusetts, Sch Med, Biomed Imaging Grp, Worcester, MA 01655, USABrown Univ, Rhode Isl Hosp, Sch Med, Dept Med, Providence, RI 02903, USAInst Politecn Nacl, CINVESTAV, Dept Biochem, Mexico City 07000, DF, MexicoSinger, JJ, Univ Massachusetts, Sch Med, Dept Physiol, Worcester, MA 01655 USA TI - Multiple pathways responsible for the stretch-induced increase in Ca2+ concentration in toad stomach smooth muscle cells AB - 1. A digital imaging microscope with fura-2 as the Ca2+ indicator was used to determine the sources for the rise in intracellular calcium concentration ([Ca2+](i)) that occurs when the membrane in a cell-attached patch is stretched. Unitary ionic currents from stretch-activated channels and [Ca2+](i) images were recorded simultaneously. 2. When suction was applied to the patch pipette to stretch a patch of membrane, Ca2+- permeable cation channels (stretch-activated channels) opened and a global increase in [Ca2+](i) occurred, as well as a greater focal increase in the vicinity of the patch pipette. The global changes in [Ca2+](i) occurred only when stretch-activated currents were sufficient to cause membrane depolarization, as indicated by the reduction in amplitude of the unitary currents. 3. When Ca2+ was present only in the pipette solution, just the fecal change in [Ca2+](i) was obtained. This focal change was not seen when the contribution from Ca2+ stores was eliminated using caffeine and ryanodine. 4. These results suggest that the opening of stretch-activated channels allows ions, including Ca2+, to enter the cell. The entry of positive charge triggers the influx of Ca2+ into the cell by causing membrane depolarization, which presumably activates voltage-gated Ca2+ channels. The entry of Ca2+ through stretch-activated channels is also amplified by Ca2+ release from internal stores. This amplification appears to be greater than that obtained by activation of whole-cell Ca2+ currents. These multiple pathways whereby membrane stretch causes a rise in [Ca2+](i) may play a role in stretch-induced contraction, which is a characteristic of many smooth muscle tissues MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 24 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000086571900003 L2 - PIG URINARY-BLADDER; ACTIVATED ION CHANNELS; REGULATED CHLORIDE CHANNELS; GUINEA-PIG; INDUCED CONTRACTION; CYTOSOLIC CALCIUM; CORONARY-ARTERY; PATCH-CLAMP; MYOCYTES; CURRENTS SO - Journal of Physiology-London 2000 ;524(1):3-17 1051 UI - 15984 AU - Kirch HH AU - Vera-Estrella R AU - Golldack D AU - Quigley F AU - Michalowski CB AU - Barkla BJ AU - Bohnert HJ AD - Univ Arizona, Dept Biochem, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Dept Biol Mol Plantas, Inst Biotechnol, Cuernavaca 62250, Morelos, MexicoBohnert, HJ, Univ Arizona, Dept Biochem, Tucson, AZ 85721, USA TI - Expression of water channel proteins in Mesembryanthemum crystallinum AB - We have characterized transcripts for nine major intrinsic proteins (MIPs), some of which function as water channels (aquaporins), from the ice plant Mesembryanthemum crystallinum. To determine the cellular distribution and expression of these MIPs, oligopeptide-based antibodies were generated against MIP-A, MIP-B, MIP-C, or MIP-F, which, according to sequence and functional characteristics, are located in the plasma membrane (PM) and tonoplast, respectively. MIPs were most abundant in cells involved in bulk water flow and solute flux. The tonoplast MIP-F was found in all cells, while signature cell types identified different PM-MIPs: MIP-A predominantly in phloem-associated cells, MIP-B in xylem parenchyma, and MIP-C in the epidermis and endodermis of immature roots. Membrane protein analysis confirmed MIP-F as tonoplast located. MIP-A and MIP-B were found in tonoplast fractions and also in fractions distinct from either the tonoplast or PM. MIP-C was most abundant but not exclusive to PM fractions, where it is expected based on its sequence signature. We suggest that within the cell, MIPs are mobile, which is similar to aquaporins cycling through animal endosomes. MIP cycling and the differential regulation of these proteins observed under conditions of salt stress may be fundamental for the control of tissue water flux MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT PHYSIOLOGISTS RP - NOT IN FILE U3 - TC 66 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000087046500011 L2 - TURGOR-RESPONSIVE GENE; VACUOLAR H+-ATPASE; ARABIDOPSIS-THALIANA; PLASMA-MEMBRANE; INTRINSIC PROTEIN; NA+/H+ ANTIPORT; MESSENGER-RNA; PLANT-CELLS; SALT STRESS; AQUAPORIN SO - Plant Physiology 2000 ;123(1):111-124 1052 UI - 16011 AU - Kirchbach M AD - Univ Aut Zacatecas, Escuela Fis, Zacatecas 98068, ZAC, MexicoUniv Mainz, Inst Kernphys, D-55099 Mainz, GermanyKirchbach, M, Univ Aut Zacatecas, Escuela Fis, Apartado Postal C-580, Zacatecas 98068, ZAC, Mexico TI - Classifying reported and "missing" resonances according to their P and C properties AB - The Hilbert space H-3q of the three quarks with one excited quark is decomposed into Lorentz group representations. It is shown that the quantum numbers of the reported and "missing" resonances fall apart and populate distinct representations that differ by their parity or/and charge conjugation properties. In this way, reported and "missing" resonances become distinguishable. For example, resonances from the full listing reported by the Particle Data Group are accommodated by Rarita-Schwinger (RS) type representations {k/2, k/2} X [{1/2, 0} + {0,1/2}] with k = 1, 3, and 5, the highest spin states being J = 3/2(-), 7/2(+), and 11/2(+), respectively. In contrast to this, most of the "missing" resonances fall into the opposite parity RS fields of highest-spins 5/2(-), 5/2(+), and 9/2(+), respectively. Rarita-Schwinger fields with physical resonances as lower-spin components can be treated as a whole without imposing auxiliary conditions on them. Such fields do not suffer the Velo-Zwanziger problem but propagate causally in the presence of electromagnetic fields. The pathologies associated with RS fields arise basically because of the attempt to use them to describe isolated spin-J = k + 1/2 states, rather than multispin-parity clusters. The positions of the observed RS clusters and their spacing are well explained trough the interplay between the rotational-like k/2(k/2 + 1)-rule and a Balmer-like -1/(k+1)(2) behavior MH - Germany MH - Mexico|Zacatecas PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 19 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000087056400003 L2 - MODEL; SPIN SO - International Journal of Modern Physics A 2000 ;15(10):1435-1451 1053 UI - 15552 AU - Klimov AB AU - Man'ko VI AD - Univ Guadalajara, Dept Fis, Guadalajara 44430, Jalisco, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44430, Jalisco, Mexico TI - Symplectic tomography of the Jaynes-Cummings model AB - We derive equations describing quantum evolution for the classical-like tomographic-probability-distribution function for the Jaynes-Cummings model. Different representations for the field part of the total density matrix are considered MH - Mexico|Jalisco MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 1071-2836 UR - ISI:000088461700001 L2 - SPIN STATES; WIGNER FUNCTION; QUANTUM; SYSTEMS; DECOHERENCE; PHASE; ATOM SO - Journal of Russian Laser Research 2000 ;21(3):205-213 1054 UI - 15816 AU - Klimov AB AU - Sanchez-Soto LL AD - Univ Guadalajara, Dept Fis, Guadalajara, Jalisco, MexicoUniv Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara, Jalisco, Mexico TI - Method of small rotations and effective Hamiltonians in nonlinear quantum optics AB - We propose a general method for diagonalizing a wide class of nonlinear Hamiltonians describing different quantum optical models. This method makes use of a nonlinear deformation of the usual su(2) algebra and when some physical parameter, dictated by the particular model under consideration, becomes small, it gives a diagonal effective Hamiltonian that describes correctly the dynamics for arbitrary states and long times. We apply as well the technique to three-level systems interacting with quantum fields, showing that it is possible to engineer resonant interactions through nonresonant processes MH - Mexico|Jalisco MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000087567900094 L2 - SCHRODINGER CAT STATES; SPONTANEOUS EMISSION; 2ND-HARMONIC GENERATION; 2-LEVEL ATOMS; FIELD; EVOLUTION; RESONANCE; DYNAMICS; SYSTEM; MODELS SO - Physical Review A 2000 ;6106(6): 1055 UI - 15701 AU - Klimova EI AU - Garcia MM AU - Klimova T AU - Ramirez LR AU - Stivalet JMM AU - Meleshonkova NN AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaKlimova, EI, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - 3,5-bis(ferrocenylmethylene)-1-methyl-4-methylenepiperidine. Synthesis and some chemical properties AB - 3,5-Bis(ferrocenylmethylene)-1-methyl-4-methylenepiperdine, a diferrocenyltriene with a fixed s-cisoid conformation of the exocyclic double bonds, was synthesized. On heating, this compound cyclodimerizes according to the [4+2]-cycloaddition scheme; it forms Diels-Alder adducts with azodicarboxylic and maleic acid N-phenylimides. The compound easily cyclodimerizes in the presence of acids by a proton cyclodimerization mechanism to give a spiro cyclodimer. The triene also adds a 3,5-bis(ferrocenylmethylene)-1,4-dimethyl-1-azonia-4-cyclohexyl salt to the terminal methylene group yielding linear and cyclic addition products MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1066-5285 UR - ISI:000087951100022 L2 - piperidine;triene;cyclodimerization;dimerization;fragmentation;allylic cation;ferrocene;DIMERIZATION REACTIONS; CYCLO-DIMERIZATION; CYCLOADDITION SO - Russian Chemical Bulletin 2000 ;49(3):514-519 1056 UI - 14963 AU - Klippert R AU - Rosu HC AD - Int Ctr Relat Astrophys, I-65100 Pescara, ItalyBrazilian Ctr Res Phys, BR-22290180 Rio De Janeiro, BrazilUniv Guanajuato, Inst Fis, Leon, Gto, MexicoKlippert, R, Int Ctr Relat Astrophys, Piazzale Republ 10, I-65100 Pescara, Italy TI - On a SUSY QM scheme for any linear homogeneous differential equation of the second order AB - A formal supersymmetric quantum mechanics (SUSY QM) procedure for any linear homogeneous second-order differential equation is briefly sketched up and applied to a simple exactly solvable case MH - Brazil MH - Italy MH - Mexico|Guanajuato PB - SIENA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0369-3554 UR - ISI:000090126000013 SO - Nuovo Cimento Della Societa Italiana di Fisica B-General Physics Relativity Astronomy and Mathematical Physics and Methods 2000 ;115(6):683-686 1057 UI - 14737 AU - Klooster D AU - Masera O AD - Florida State Univ, Dept Geog, Tallahassee, FL 32306, USAUNAM, Inst Ecol, Dept Ecol Recursos Nat, Patzcuaro 61609, Michoacan, MexicoKlooster, D, Florida State Univ, Dept Geog, Tallahassee, FL 32306, USA TI - Community forest management in Mexico: carbon mitigation and biodiversity conservation through rural development AB - Forest management is an important carbon mitigation strategy for developing countries. As demonstrated by the case of Mexico, community forest management is especially effective because it offers tangible local benefits while conserving forests and sequestering carbon. Community forestry receives minimal government support now, but the clean development mechanism (CDM) of the Kyoto Protocol could leverage additional resources to promote the approach in Mexico and elsewhere. We argue that adequately designed and implemented, community forestry management projects can avoid deforestation and restore forest cover and forest density. They comprise promising options for providing both carbon mitigation and sustainable rural development. These kinds of projects should be included in the CDM. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Michoacan MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 26 U4 - Environmental Sciences;Environmental Studies;Geography U5 - J;Article AV - English IS - 0959-3780 UR - ISI:000165819700003 L2 - climate change;mitigation options;clean development mechanism;community forestry;Mexico;Latin America;LAND-USE; RESOURCE; COMMONS; AMERICA; PARKS SO - Global Environmental Change-Human and Policy Dimensions 2000 ;10(4):259-272 1058 UI - 13107 AU - Koehler KM AU - Cunningham-Sabo L AU - Lambert LC AU - McCalman R AU - Skipper BJ AU - Davis SM AD - Univ New Mexico, Sch Med, Dept Pediat, Albuquerque, NM 87131, USAUniv New Mexico, Sch Med, Dept Family & Community Med, Albuquerque, NM 87131, USAUniv Mexico, Sch Med, Mexico City, DF, MexicoKoehler, KM, US FDA, Ctr Food Safety & Appl Nutr, HFS-728,200 C St SW, Washington, DC 20204 USA TI - Assessing food selection in a health promotion program: Validation of a brief instrument for American Indian children in the Southwest United States AB - Objective Brief dietary assessment instruments are needed to evaluate behavior changes of participants in dietary intervention programs. The purpose of this project was to design and validate an instrument for children participating in Pathways to Health, a culturally appropriate, cancer prevention curriculum. Design Validation of a brief food selection instrument, Yesterday's Food Choices (YFC), which contained 33 questions about foods eaten the previous day with response choices of yes, no, or not sure. Reference data for validation were 24-hour dietary recalls administered individually to 120 students selected randomly. Subjects The YFC and 24-hour dietary recalls were administered to American Indian children in fifth- and seventh-grade classes in the Southwest United States. Statistical analyses performed Dietary recalls were coded for food items in the YFC and results were compared for each item using percentage agreement and the kappa statistic. Results Percentage agreement for all items was greater than 60%; for most items it was greater than 70%, and for several items it was greater than 80%. The amount of agreement beyond that explained by chance (kappa statistic) was generally small. Three items showed substantial agreement beyond chance (kappa greater than or equal to 0.6); 2 items showed moderate agreement (kappa = 0.40 to 0.59); most items showed fair agreement (kappa = 0.20 to 0.39). The food items showing substantial agreement were hot or cold cereal, low-fat milk, and mutton or chile stew. Fried or scrambled eggs and deep-fried foods showed moderate agreement beyond chance. Conclusions Previous development and validation of brief food selection instruments for children participating in health promotion programs has had limited success. In this study, instrument-related factors that apparently contributed to poor agreement between data from the YFC and 24-hour dietary recall were inclusion of categories of foods vs specific foods; food knowledge, preparation, and vocabulary; item length; and overreporting of attractive foods. Collecting and scoring the 24-hour recall data may also have contributed to poor agreement. Further development of brief instruments for evaluating changes in children's behavior in dietary intervention programs is necessary. Factors related to the YFC that need further development may be issues that are also important in the development of effective, brief dietary assessments for children as individual clients or patients MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: AMER DIETETIC ASSOC RP - NOT IN FILE U3 - TC 4 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-8223 UR - ISI:000170310500019 L2 - SCHOOL-CHILDREN; OBESITY; NAVAJO; GUIDELINES; NUTRITION; FREQUENCY; ACCURACY; VALIDITY; PROJECT; ISSUES SO - Journal of the American Dietetic Association 2000 ;100(2):205-211 1059 UI - 15064 AU - Koenigsberger G AU - Georgiev L AU - Barba R AU - Tzvetanov Z AU - Walborn NR AU - Niemela VS AU - Morrell N AU - Schulte-Ladbeck R AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl La Plata, Fac Ciencias Astron & Geofis, La Plata, ArgentinaJohns Hopkins Univ, Baltimore, MD, USASpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Pittsburgh, Pittsburgh, PA, USAKoenigsberger, G, Natl Autonomous Univ Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - Hubble Space Telescope observations of the luminous blue variable/W-R eclipsing binary system HD 5980 AB - We report the results of Hubble Space Telescope STIS observations of the intriguing luminous blue variable/Wolf-Rayet binary system HD 5980 in the Small Magellanic Cloud. Although its spectral characteristics (WN6) are currently very similar to those observed in 1995 in the FUV, some of the line fluxes continue with the increasing trend observed since the 1980s. The erupting star still dominates the emission-line spectrum, and a radial velocity curve from UV lines is derived, supporting previous estimates of its mass (50 M.). A rough estimate of 2 x 10(-4) M. yr(-1) for the current mass-loss rate of this star is derived. The only spectral lines attributable to the close companion are the very extended P Cygni absorption components of the strong UV lines, present only during the eclipse of the eruptor, implying that the wind-wind collision shock cone winds tightly around this companion. A third stellar component contributing to the spectrum is detected through the presence of stationary photospheric absorption lines in the UV spectrum. This object contributes similar to 30% to the UV continuum luminosity. A new set of ISM absorption components at -680 km s(-1) has appeared as a result of the shock interface between the slow wind (similar to 400 km s(-1)) that emerged during the 1994 eruption and the subsequently emerging fast wind (similar to 2000 km s(-1)) phases MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089954400042 L2 - binaries : general;stars : evolution;stars : individual (HD 5980);stars : variables : other;stars : winds, outflows;stars : Wolf-Rayet;SMALL-MAGELLANIC-CLOUD; WOLF-RAYET BINARY; MASSIVE STARS; DYNAMICAL EVOLUTION; IUE OBSERVATIONS; TERM ANALYSIS; O-STARS; HD-5980; SMC; SPECTRUM SO - Astrophysical Journal 2000 ;542(1):428-445 1060 UI - 15568 AU - Koga M AU - Akahane H AU - Lamothe-Argumedo R AU - Osorio-Sarabia D AU - Garcia-Prieto L AU - Martinez-Cruz JM AU - az-Camacho SP AU - Noda K AD - Kyushu Univ, Grad Sch Med Sci, Dept Microbiol Parasitol, Fukuoka 8128582, JapanFukuoka Univ, Sch Med, Dept Parasitol, Fukuoka 8140180, JapanUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Lab Helmintol, Mexico City 04510, DF, MexicoUniv Autonoma Sinaloa, Fac Ciencias Quim Biol, Culiacan, Sinaloa, MexicoKoga, M, Kyushu Univ, Grad Sch Med Sci, Dept Microbiol Parasitol, Fukuoka 8128582, Japan TI - Surface ultrastructure of larval Gnathostoma cf. binucleatum from Mexico AB - We examined the morphology of gnathostome larvae obtained in Temazcal and Sinaloa, Mexico, mainly using scanning electron microscopy. The mean body length was 4.67 mm. The head had 4 transverse rows of hooklets, and the mean number of each row was 40, 44, 47, and 50. The bodies were wholly covered with minute cuticular spines along their transverse striations. The mean number of striations varied from 227 to 275. The cervical papillae were situated between the 13th and 17th transverse striations, and most specimens had them between the 14th and 15th transverse striations. An excretory pore was also located between the 24th and 28th transverse striations. We identified this Mexican gnathostome as Gnathostome cf. binucleatum Almeyda-Artigas, 1991 MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 3 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1049-233X UR - ISI:000088415900014 L2 - Gnathostoma cf. binucleatum;scanning electron microscopy;morphology;Mexico SO - Comparative Parasitology 2000 ;67(2):244-249 1061 UI - 16609 AU - Kogan E AU - Mello PA AU - He LQ AD - Bar Ilan Univ, Dept Phys, Minerva Ctr, IL-52900 Ramat Gan, IsraelBar Ilan Univ, Dept Phys, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, IsraelUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230026, Peoples R ChinaKogan, E, Bar Ilan Univ, Dept Phys, Minerva Ctr, IL-52900 Ramat Gan, Israel TI - Wave scattering through classically chaotic cavities in the presence of absorption: An information-theoretic model AB - We propose an information-theoretic model for the transport of waves through a chaotic cavity in the presence of absorption. The entropy of the S-matrix statistical distribution is maximized, with the constraint [Tr SSdagger] = alpha n: n is the dimensionality of S, and 0 less than or equal to alpha less than or equal to 1, alpha = 0(1) meaning complete (no) absorption. For strong absorption our result agrees with a number of analytical calculations already given in the literature. In that limit, the distribution of the individual (angular) transmission and reflection coefficients becomes exponential (Rayleigh statistics), even for n = 1. For n much greater than 1 Rayleigh statistics is attained even with no absorption; here, we extend the study to alpha < 1. The model is compared with random-matrix-theory numerical simulations: it describes the problem very well for strong absorption, but fails for moderate and weak absorptions. Thus, in the latter regime, some important physical constraint is missing in the construction of the model MH - Israel MH - Mexico|Distrito Federal MH - Peoples R China PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000084935200005 L2 - RANDOM-MEDIA; TRANSMISSION; PROBABILITY SO - Physical Review e 2000 ;61(1):R17-R20 1062 UI - 15930 AU - Kondrashov VS AU - Rothenberg SJ AU - Sajo-Bohus L AU - Greaves ED AU - Liendo JA AD - Charles R Drew Univ Med & Sci, Toxicol Res Lab, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoUniv Simon Bolivar, Dept Phys, Caracas, VenezuelaKondrashov, VS, Charles R Drew Univ Med & Sci, Toxicol Res Lab, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Increasing reliability in gamma and X-ray spectral data analysis: least moduli approach AB - A method for increasing reliability of parameter estimations for X- and gamma-ray spectral data acquired by semiconductor detectors and multichannel analyzers has been developed. We describe the advantages of using the method of least moduli over the method of least squares when analyzing peaks with high peak/background ratios. The influence of different distortion factors was explored along with the limitations on applying the new method. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000087312500014 L2 - gamma-ray;X-ray;spectral analysis;numerical methods;multichannel analyzer SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2000 ;446(3):560-568 1063 UI - 14775 AU - Korovin LI AU - Lang IG AU - Contreras-Solorio DA AU - Pavlov ST AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Escuela Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaKorovin, LI, Russian Acad Sci, AF Ioffe Physicotech Inst, Ul Politekhnicheskaya 26, St Petersburg 194021, Russia TI - Change in the shape of a symmetric light pulse passing through a quantum well AB - A theory for the response of a 2D two-level system to irradiation by a symmetric light pulse is developed. Under certain conditions, such an electron system approximates an ideal solitary quantum well in a zero field or a strong magnetic field H perpendicular to the plane of the well. One of the energy levels is the ground state of the system, while the other is a discrete excited state with energy (h) over bar omega (0), which may be an exciton level for H = 0 or any level in a strong magnetic field. It is assumed that the effect of other energy levels and the interaction of light with the lattice can be ignored. General formulas are derived for the time dependence of the dimensionless "coefficients" of the reflection R(t), absorption A(t), and transmission T(t) for a symmetric light pulse. It is shown that the R(t), A(t), and T(t) time dependences have singular points of three types. At points t(0) of the first type, A(t(0)) = T(t(0)) = 0 and total reflection takes place. It is shown that for gamma (r) > gamma, where gamma (r) and gamma are the radiative and nonradiative reciprocal lifetimes, respectively, for the upper energy level of the two-level system, the amplitude and shape of the transmitted pulse can change significantly under the resonance omega (l) = omega (0). In the case of a long pulse, when gamma (l) < gamma (r) , the pulse is reflected almost completely. (The quantity gamma (l) characterizes the duration of the exciting pulse.) In the case of an intermediate pulse duration gamma (l) similar or equal to gamma (r) , the reflection, absorption, and transmission are comparable in value and the shape of the transmitted pulse differs considerably from the shape of the exciting pulse: the transmitted pulse has two peaks due to the existence of the point t(0) of total reflection, at which the transmission is zero. If the carrier frequency omega (l) of light differs from the resonance frequency omega (0), the oscillating R(t), A(t), and T(t) time dependences are observed at the frequency Delta omega = omega (l) - omega (0). Oscillations can be observed most conveniently for Delta omega similar or equal to gamma (l). The position of the singular points of total absorption, reflection, and transparency is studied for the case when omega (l) differs from the resonance frequency. (C) 2000 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000165570800020 L2 - EXCITONS SO - Physics of the Solid State 2000 ;42(12):2300-2313 1064 UI - 15908 AU - Koubsky P AU - Harmanec P AU - Hubert AM AU - Floquet M AU - Kubat J AU - Ballereau D AU - Chauville J AU - Bozic H AU - Holmgren D AU - Yang S AU - Cao H AU - Eenens P AU - Huang L AU - Percy JR AD - Akad Ceske Republ, Astron Ustav, Ondrejov 25165, Czech RepublicCharles Univ, Astron Ustav, Matemat Fyzikalni Fak, CR-18000 Prague 8, Czech RepublicObserv Paris, DASGAL, UMR 8633 CNRS, F-92195 Meudon, FranceOpservatorij Hvar Geodetskog, Fak Sveucilista Zagrebu, Zagreb 10000, CroatiaChinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R ChinaUniv Guanajuato, Dept Astron, Guanajuato 36000, GTO, MexicoUniv Toronto, Erindale Coll, Mississauga, ON L5L 1C6, CanadaUniv Toronto, Dept Astron, Mississauga, ON L5L 1C6, CanadaUniv Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, CanadaBrandon Univ, Dept Phys & Astron, Brandon, MB R7A 6A9, CanadaKoubsky, P, Akad Ceske Republ, Astron Ustav, Ondrejov 25165, Czech Republic TI - Properties and nature of Be stars XIX. Spectral and light variability of 60 Cygni AB - An analysis of electronic spectra secured between 1992 and 1999 at the Haute Provence, Ondrejov and Dominion Astrophysical Observatories and of differential UBV measurements of 60 Cyg obtained between 1984 and 1999 at Hvar, San Pedro Martir, Toronto and Xinglong Observatories, the all-sky Hipparcos satellite H-p photometry transformed to Johnson V and B magnitudes, and all-sky UBV observations published by several authors and dating back to fifties, led to the following findings: 1. 60 Cyg exhibits pronounced long-term spectral variations characterized by the B --> Be --> B phase transitions. These long-term spectral changes of 60 Cyg are also accompanied by corresponding, though rather mild, secular light and colour variations. The character of these variations is indicative of a positive correlation between the brightness and emission-line strength. 2. NLTE model atmosphere analysis of spectra secured during the quiescence state (B phase) of 60 Cyg shows that the star has overabundance of helium. Best results were obtained for N-He/N-H = 0.2. 3. The presence of periodic medium-term changes, with a period of 146.(d)6 +/- 0.(d)6 was found in the radial-velocity of the H alpha and He I 6678 Angstrom lines. If confirmed by future observations, these variations could indicate that 60 Cyg is a spectroscopic binary. 4. There are clear rapid periodic line-profile changes of (a) overall line asymmetry, and (b) weak sub-features passing across the line profiles every about 0.(d)1. The radial velocity and asymmetry of He I lines vary with a period of 1.(d)0647 and a double-wave curve. There is no evidence of this period in photometry, however. 5. The rapid light variations of 60 Cyg are dominated by rapid changes with a full amplitude of almost 0.(m)1. A period analysis of V magnitude data prewhitened for the long-term changes indicates a period of 0.(d)2997029, reported earlier. The most interesting finding is that also ail recorded series of moving sub-features in the line profiles can be reconciled with this period: the sub-features reappear at the same phase intervals of the 0.(d)2997 period in the line profiles over an interval of several years. Considering the acceleration of these sub-features, 1900 km s(-1)d(-1), it is conceivable that the true physical (super) period of these changes is either 0.(d)8991 or 1.(d)1988. 6. The findings mentioned in points 4 and 5 represent a challenge for the NRP scenario since the light changes would be dominated by a high-order mode instead of a low-order one MH - Canada MH - Croatia MH - Czech Republic MH - France MH - Mexico|Guanajuato MH - Peoples R China PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000087446700019 L2 - stars : early-type;stars : emission-line, Be;stars : individual : 60 Cyg;stars : oscillations;stars : variables : general;LINE-PROFILE VARIATIONS; APPROXIMATE LAMBDA-OPERATORS; SMOOTHING OBSERVATIONAL DATA; MODEL ATMOSPHERES; COMPONENTS; BRIGHT SO - Astronomy and Astrophysics 2000 ;356(3):913-928 1065 UI - 14648 AU - Kowalewski M AU - Serrano GEA AU - Flessa KW AU - Goodfriend GA AD - Virginia Polytech Inst & State Univ, Dept Geol Sci, Blacksburg, VA 24061, USAUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAGeorge Washington Univ, Dept Earth & Environm Sci, Washington, DC 20052, USAKowalewski, M, Virginia Polytech Inst & State Univ, Dept Geol Sci, Blacksburg, VA 24061 USA TI - Dead delta's former productivity: Two trillion shells at the mouth of the Colorado River AB - The diversion of the Colorado River by dams and irrigation projects, started in the 1930s, triggered the collapse of the Colorado delta ecosystem, Paleontological, ecological, geochronological, stable isotope, field, and satellite image data provide estimates of the delta's benthic productivity during the 1 k.y. directly preceding the artificial shutdown of the river. At least 2 x 10(12) shells of bivalve mollusks make up the current beaches and islands of the delta. The 125 individual valves dated using C-14-calibrated amino acid racemization indicate that these shells range in age from A.D. 950 to 1950. Seasonal intrashell cycles in delta O-18 values indicate that average-sized bivalves lived at least 3 yr. The most conservative calculation based on these numbers indicates that during the time of natural river flow, an average standing population of similar to6 x 10(9) bivalve mollusks (population density similar to 50/m(2)) thrived on the delta. In contrast, the present abundance of shelly benthic macroinvertebrates is similar to 94% lower (3/m(2) in 1999-2000). The dramatic decrease in abundance testifies to the severe loss of benthic productivity resulting from diversion of the river's flow and the inadequacy of its partial resumption (1981 to present). An integration of paleontological records with geomorphological, geochemical, and geochronological data can provide quantitative insights into human impact on coastal ecosystems MH - Mexico|Baja California MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 36 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000165977500001 L2 - paleoecology;productivity;estuary;Colorado River;Holocene;CALIFORNIA; MEXICO SO - Geology 2000 ;28(12):1059-1062 1066 UI - 15066 AU - Kraan-Korteweg RC AU - Lahav O AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandKraan-Korteweg, RC, Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico TI - The Universe behind the Milky Way AB - Due to the foreground extinction of the Milky Way, galaxies appear increasingly fainter the closer they lie to the Galactic Equator, creating a "zone of avoidance" of about 25% in the distribution of optically visible galaxies. A "whole-sky" map of galaxies is essential, however, for understanding the dynamics in our local Universe, in particular the peculiar velocity of the Local Group with respect to the Cosmic Microwave Background and velocity flow fields such as in the Great Attractor region. Various dynamically important structures behind the Milky Way have only recently been made "visible" through dedicated deep surveys at various wavelengths. The wide range of observational searches (optical, near infrared, far infrared, radio and X-ray) for galaxies in the Zone of Avoidance are reviewed, including a discussion on the Limitations and selection effects of these partly complementary approaches. The uncovered and suspected large-scale structures are summarized. Reconstruction methods of the density field in the Zone of Avoidance are described and the resulting predictions compared with observational evidence. The comparison between reconstructed density fields and the observed galaxy distribution allow derivations of the density and biasing parameters Ohm (0) and b MH - United Kingdom MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0935-4956 UR - ISI:000089958500002 L2 - zone of avoidance;surveys;clusters;large-scale structure of Universe;ISM : dust, extinction;LARGE-SCALE STRUCTURE; MASSIVE GALAXY CLUSTER; SPHERICAL HARMONIC-ANALYSIS; OPTICAL REDSHIFT SURVEY; GREAT-ATTRACTOR REGION; LOW GALACTIC LATITUDE; WIENER RECONSTRUCTION; NEARBY GALAXIES; VELOCITY-FIELD; OBSCURED GALAXIES SO - Astronomy and Astrophysics Review 2000 ;10(3):211-261 1067 UI - 15916 AU - Kraan-Korteweg RC AU - Juraszek S AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, Gto, MexicoUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaCSIRO, Australia Telescope Natl Facil, Epping, NSW 2121, AustraliaKraan-Korteweg, RC, Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Gto, Mexico TI - Mapping the hidden universe: The galaxy distribution in the zone of avoidance AB - Due to the foreground extinction of the Milky Way, galaxies become increasingly faint as they approach the Galactic Equator creating a 'zone of avoidance' (ZOA) in the distribution of optically visible galaxies of about 25%. A 'whole-sky' map of galaxies is essential, however, for understanding the dynamics in our local Universe, in particular the peculiar velocity of the Local Group with respect to the Cosmic Microwave Background and velocity flow fields such as in the Great Attractor (GA) region. The current status of deep optical galaxy searches behind the Milky Way and their completeness as a function of foreground extinction will be reviewed. It has been shown that these surveys-which in the mean time cover the whole ZOA (Figure 2)-result in a considerable reduction of the ZOA from extinction levels of A(B) = 1(m).0 (Figure 1) to A(B) = 3(m).0 (Figure 3). In the remaining, optically opaque ZOA, systematic HI surveys are powerful in uncovering galaxies, as is demonstrated for the GA region with data from the full sensitivity Parkes Multibeam RI survey (300 degrees less than or equal to e less than or equal to 332 degrees, \b\ less than or equal to 5 degrees.5, figure 4) MH - Australia MH - Mexico|Guanajuato PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1323-3580 UR - ISI:000087322200002 L2 - zone of avoidance;surveys;ISM : dust, extinction;large-scale structure of universe;MILKY-WAY; DIPOLE ANISOTROPY; GALACTIC PLANE; OPTICAL SURVEY; REGION; SEARCH; SUPERCLUSTER; SAGITTARIUS; 230-DEGREES; RADIATION SO - Publications of the Astronomical Society of Australia 2000 ;17(1):6-12 1068 UI - 15564 AU - Kranakis E AU - Krizanc D AU - Urrutia J AD - Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoKranakis, E, Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, Canada TI - Efficient regular polygon dissections AB - We study the minimum number g(m, n) (respectively, p(m, n)) of pieces needed to dissect a regular m-gon into a regular n-gon of the same area using glass-cuts (respectively, polygonal cuts). First we study regular polygon-square dissections and show that [n/2] - 2 less than or equal to g(4, n) less than or equal to n/2 + o(n) and [n/4] less than or equal to g(n, 4) less than or equal to n/2 + o(n) hold for sufficiently large n. We also consider polygonal cuts, i.e., the minimum number p(4, n) of pieces needed to dissect a square into a regular n-gon of the same area using polygonal cuts and show that [n/4] less than or equal to p(4, n) less than or equal to (n)(2)+o(n), holds for sufficiently large n. We also consider regular polygon-polygon dissections and obtain similar bounds for g(m, n) and p(m, n) MH - Canada MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000088438400014 L2 - dissections;glass-cuts;polygonal cuts;regular polygons;squares SO - Discrete and Computational Geometry 2000 ;1763():172-187 1069 UI - 14820 AU - Krapivsky PL AU - Redner S AU - Leyvraz F AD - Boston Univ, Ctr BioDynam, Ctr Polymer Studies, Boston, MA 02215, USABoston Univ, Dept Phys, Boston, MA 02215, USAUniv Toulouse 3, Phys Quant Lab, CNRS, IRSAMC, F-31062 Toulouse, FranceCtr Int Ciencias, Cuernavaca, Morelos, MexicoKrapivsky, PL, Boston Univ, Ctr BioDynam, Ctr Polymer Studies, Boston, MA 02215 USA TI - Connectivity of growing random networks AB - A solution for the time- and age-dependent connectivity distribution of a growing random network is presented. The network is built by adding sites that link to earlier sites with a probability A(k) which depends on the number of preexisting links k to that site. For homogeneous connection kernels, A(k) similar to k(gamma), different behaviors arise for gamma < 1, > 1, and gamma = 1. For gamma < 1, the number of shes with k links, Nk, varies as a stretched exponential. For > 1, a single site connects to nearly all other sites. In the borderline case A(k) similar to k, the power law N-k similar to k(-nu) is found, where the exponent nu can be tuned to any value in the range 2 < < MH - France MH - USA MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 261 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000165399000055 L2 - KAUFFMAN MODEL SO - Physical Review Letters 2000 ;85(21):4629-4632 1070 UI - 15054 AU - Kravchenko VF AU - Shkvarko YV AU - Jaime-Rivas R AD - Russian Acad Sci, Fryazino Branch, Inst Radio Engn & Elect, Fryazino 141120, Moscow Oblast, RussiaUniv Guanajuato, Mexico City, DF, MexicoKravchenko, VF, Russian Acad Sci, Fryazino Branch, Inst Radio Engn & Elect, Pl Vvedenskogo 1, Fryazino 141120, Moscow Oblast, Russia TI - Complexation of radio images with the use of a dynamic maximum entropy neural network AB - A new approach is proposed to the problem of improving the quality of radio images (RIs) of extensive objects by the complexation of separate images formed simultaneously be several passive remote-sensing (RS) systems. The complexation problem is solved as a nonlinear inverse problem of restoring the true image of an object by the combined processing of various distorted radio images. The minimum of the a priori knowledge available is formalized by the maximum entropy (ME) model of the restored image. The solution of the problem is constructed by the minimization of the energy function of a dynamic neural network (NN) with a multilevel vector of states whose parameters integrate the measurement and model information available MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1064-2269 UR - ISI:000089958700011 L2 - RESTORATION SO - Journal of Communications Technology and Electronics 2000 ;45(10):1105-1113 1071 UI - 15841 AU - Kravchenko VF AU - Pustovoit VI AU - Ponomarev VI AU - Pogrebnyak AB AD - Russian Acad Sci, Inst Radioengn & Elect, Moscow 103907, RussiaRussian Acad Sci, Unique Tool Making Sci Technol Ctr, Moscow, RussiaMexico Natl Polytech Inst, Mexico City, DF, MexicoUkrainian State Aerosp Univ, Kharkov, UkraineKravchenko, VF, Russian Acad Sci, Inst Radioengn & Elect, Marx Ave 18, Moscow 103907, Russia TI - The robust algorithms of images filtration in presence of additive, multiplicative, and impulse noises MH - Mexico|Distrito Federal MH - Russia MH - Ukraine PB - MOSCOW: MEZHDUNARODNAYA KNIGA RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Article AV - Russian IS - 0869-5652 UR - ISI:000086911100010 SO - Doklady Akademii Nauk 2000 ;371(5):611-616 1072 UI - 15567 AU - Kritsky DC AU - Jimenez-Ruiz FA AU - Sey O AD - Idaho State Univ, Coll Hlth Profess, Dept Hlth & Nutr Sci, Pocatello, ID 83209, USAUNAM, Inst Biol, Lab Helmintol, Mexico City, DF, MexicoKuwait Univ, Dept Zool, Safat 13060, KuwaitKritsky, DC, Idaho State Univ, Coll Hlth Profess, Dept Hlth & Nutr Sci, Box 8090, Pocatello, ID 83209 USA TI - Diplectanids (Monogenoidea : Dactylogyridea) from the gills of marine fishes of the Persian Gulf off Kuwait AB - Seventeen species of Diplectanidae were collected from the gills of 17 species of marine fishes from the Persian Gulf off Kuwait. Lepidoterma kuwaitensis sp. n. from Terapon puta (Teraponidae), Lamellodiscus furcillatus sp. n. from Diplodus nod (Sparidae), and Protolamellodiscus senilobatus sp. n. from Argyrops spinifer and A. filamentosus (Sparidae) are described. Diplectanum cazauxi from Sphyraena jello and S. obtusata (Sphyraenidae) (new host and geographic records), D. sillagonum from Sillago sihama (Sillaginidae) (new geographic record), Pseudolamellodiscus syhyraenae from Sphyraena chrysotaenia (Sphyraenidae) (new host and geographic records), and Calydiscoides fleuxuosus from Nemipterus peronii and N. bipunctatus (Nemipteridae) (new host and geographic records) are redescribed. An incidental geographic record for C. flexuous on N. japonicus from the western coast of India is included. Ten diplectanid species From 8 hosts were unidentified for lack of sufficient specimens. Diplectanum longipenis (synonym: Squamdiscus longipenis) is transferred to Lepidotrema. Squamodiscus is removed from synonymy with Diplectanum and becomes a junior subjective synonym of Lepidotrema. Calydiscoides indianus (synonyms: Lamellospina indiana and C. indicus) is a junior subjective synonym of C. flexuosus MH - USA MH - Kuwait MH - Mexico|Distrito Federal PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 17 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1049-233X UR - ISI:000088415900001 L2 - Monogenoidea;monogenean;Diplectanidae;Calydiscoides flexuosus;Diplectanum cazauxi;Diplectanum sillagonum;Diplectanum sp.;Lamellodiscus furcillatus sp n.;Lamellodiscus sp.;Lepidotrema kuwaitensis sp n.;Lepidotrema longipenis comb. n.;Protolamellodiscus senilobatus sp n.;Pseudolamellodiscus sphyraenae;Pseudorhabdosynochus sp.;Acanthopagrus berda;Acanthopagrus bifasciatus;Acanthopagrus latus;Argyrops filamentosus;Argyrops spinifer;Diplodus noct;Epinephelus areolatus;Epinephelus tauvina;Hemiramphus marginatus;Nemipterus bipunctatus;Nemipterus peronii;Otolithes argenteus;Sillago sihama;Sphyraena chrysotaenia;Sphyraena jello;Sphyraena obtusata;Terapon puta;Persian Gulf;Kuwait;GEN SO - Comparative Parasitology 2000 ;67(2):145-164 1073 UI - 16241 AU - Kritsky DC AU - Mendoza-Franco EF AU - Scholz T AD - Idaho State Univ, Dept Hlth & Nutr Sci, Pocatello, ID 83209, USAUniv Merida, IPN, CINVESTAV, Natl Polytech Inst,Ctr Invest & Adv Studies, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicKritsky, DC, Idaho State Univ, Dept Hlth & Nutr Sci, Box 8090, Pocatello, ID 83209 USA TI - Neotropicla monogenoidea. 36. Dactylogyrids from the gills of Rhamdia guatemalensis (Siluriformes : Pimelodidae) from cenotes of the Yucatan Peninsula, Mexico, with proposal of Ameloblastella gen. n. and Aphanoblastella gen. n. (Dactylogyridae : Ancyrocephalinae) AB - Ameloblastella gen. n. and Aphanoblastella gen. n. are proposed for dactylogyrids from the gills of pimelodid catfishes (Siluriformes) in the Neotropical Biogeographical Region. Species of Ameloblastella and Aphanoblastella are characterized on the bases of gonadal position, hook shank morphology, presence/absence of eyes and eye granules, and morphology of the male reproductive system. Two species of Urocleidoides (sensu lato) and 1 of Vancleaveus are transferred to Ameloblastella as A. chavarriai (Price, 1938) comb. n. (type species), A. mamaevi (Kritsky and Thatcher, 1976) comb. n. and A. platensis (Suriano and Incorvaia, 1995) comb. n., respectively. Three species of Urocleidoides (sensu lato) from pimelodid catfishes are transferred to Aphanoblastella as A. travassosi (Price, 1938) comb. n. (type species), A. robustus (Mizelle and Kritsky, 1969) comb. n. and A. mastigatus (Suriano, 1986) comb. n MH - Czech Republic MH - USA MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 11 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1049-233X UR - ISI:000086297400009 L2 - Monogenoidea;Dactylogyridae;Ameloblastella;Aphanoblastella;Ameloblastella chavarriai comb. n.;Ameloblastella mamaevi comb. n.;Ameloblastella platensis comb. n.;Aphanoblastella travassosi comb. n.;Aphanoblastella mastigatus comb. n.;Aphanoblastella robustus comb. n.;catfish;Siluriformes;Pimclodidae;Rhamdia guatemalensis;cenotes;Mexico;TREMATODES; FISHES SO - Comparative Parasitology 2000 ;67(1):76-84 1074 UI - 14998 AU - Kryshtab TG AU - Gomez JP AU - Lytvyn PM AU - Lytvyn OS AD - IPN, ESFM, Dept Mat Sci, UPALM, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, UA-252028 Kiev, UkraineKryshtab, TG, IPN, ESFM, Dept Mat Sci, UPALM, Mexico City 07738, DF, Mexico TI - The influence of TiB2-thin film thickness on metal-GaAs structural characteristics AB - X-Ray diffraction and atomic force microscopy structural properties investigations of TiB2/GaAs device structures as-produced and annealed have been carried out. The samples were obtained by magnetron sputtering on Czochralski-grown (001) GaAs substrates doped by Te up to a concentration of 10(18) cm(-3). The magnetron sputtering was carried out in an argon atmosphere at pressure in the chamber of 5 x 10(-3) torr. The currents of sputtering were 0.3 A and 0.4 A and the thickness of TiB2-films was from 10 nm to 50 nm. The short-term annealing of the samples was carried out in a stream of hydrogen in the furnace at temperatures 400, 600 and 800 degreesC during 1 min with a heating velocity of 1800 degreesC/min. The TiB2-film thickness and magnetron sputtering current determined the grain size and surface roughness as well as interface structural parameters. At sputtering current 0.4 A, some process of film texturing takes place. The residual strains in the film increase with a rise in the sputtering current. The structural relaxation at annealing is exhibited in decreasing of residual strains as well as film recrystallization and transformation of surface morphology. The dependence of these processes on annealing temperature does not have monotonous character and differs for various thicknesses of TiB2-film. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900019 L2 - titanium borides;sputtering;structural properties;annealing;atomic force microscopy;ELECTRICAL-PROPERTIES; TIB2 SO - Thin Solid Films 2000 ;373(1-2):79-83 1075 UI - 15243 AU - Kryshtab TG AU - Lytvyn OS AU - Lytvyn PM AU - Prokopenko IV AD - Natl Acad Sci Ukraine, Inst Semicond Phys, UA-252650 Kiev 28, UkraineIPN, UPALM, ESFM, Dept Mat Sci, Mexico City 07738, DF, MexicoLytvyn, PM, Natl Acad Sci Ukraine, Inst Semicond Phys, 45 Prospect Nauki, UA-252650 Kiev 28, Ukraine TI - Relaxation processes in Au-TiB2/GaAs structures under short-term thermal annealing AB - The investigations of the structure parameters of Au-TiB2/GaAs and TiB2/GaAs device structures and their transformations at short-term thermal annealing were carried out. The metal films were magnetron sputtered on Czochralski-grown (001) GaAs in an argon atmosphere. The growth rate was similar to 5 nm/s and the film thickness ranged from 10 to 50 nm. The samples were annealed for 1 min at 400 degrees C, 600 degrees C and 800 degrees C. Using X-ray diffraction, scanning electron microscope (SEM) and scanning probe microscope (SPM) methods, it was shown that sputtering titanium diboride films causes the titanium and boron solid solutions to form as well as the appearance of some other phases in the interface region. Short-term annealing at above temperatures leads to elastic strain relaxation, changes of film morphology, decay of solid solutions and generation of dislocations. The relaxation processes differ for various types of structures. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000089432000025 L2 - TiB2;Au;metal film;GaAs;short-term annealing;structural defects;TIB2 SO - Applied Surface Science 2000 ;166(1-4):130-136 1076 UI - 15644 AU - Kubo I AU - Kinst-Hori I AU - Chaudhuri SK AU - Kubo Y AU - Sanchez Y AU - Ogura T AD - Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720, USAUniv Autonoma Guadalajara, Dept Quim, Guadalajara, Jalisco, MexicoKubo, I, Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA TI - Flavonols from Heterotheca inuloides: Tyrosinase inhibitory activity and structural criteria AB - Tyrosinase inhibitory activity of flavonols, galangin, kaempferol and quercetin, was found to come from their ability to chelate copper in the enzyme. In contrast, the corresponding flavones, chrysin, apigenin and luteolin, did not chelate copper in the enzyme. The chelation mechanism seems to be specific to flavonols as long as the 3-hydroxyl group is free. Interestingly, flavonols affect the enzyme activity in different ways. For example, quercetin behaves as a cofactor and does not inhibit monophenolase activity. On the other hand, galangin inhibits monophenolase activity and does not act as a cofactor. Kaempferol neither acts as a cofactor nor inhibits monophenolase activity. However, these three flavonols are common to inhibit diphenolase activity by chelating copper in the enzyme. (C) 2000 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Jalisco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 47 U4 - Biochemistry & Molecular Biology;Chemistry, Medicinal;Chemistry, Organic U5 - J;Article AV - English IS - 0968-0896 UR - ISI:000088281900023 L2 - MUSHROOM TYROSINASE; POLYPHENOL OXIDASES; CHLOROGENIC ACID; KOJIC ACID; COPPER; BINDING; PLANTS; SITE SO - Bioorganic & Medicinal Chemistry 2000 ;8(7):1749-1755 1077 UI - 15747 AU - Kudriavtsev Y AU - Villegas A AU - Godines A AU - Ecker P AU - Asomoza R AU - Nikishin S AU - Jin C AU - Faleev N AU - Temkin H AD - IPN, Ctr Invest & Estudios Avanzados, Mexico City 07300, DF, MexicoTexas Tech Univ, Dept Elect Engn, Lubbock, TX 79409, USAKudriavtsev, Y, IPN, Ctr Invest & Estudios Avanzados, Av IPN 2508,Apdo Postal 14-740, Mexico City 07300, DF, Mexico TI - SIMS study of GaAsN/GaAs multiple quantum wells AB - Depth profiling of GaAsN/GaAs multiple quantum well structures has been performed by SIMS. It is shown that the experimental depth resolution does not depend on the kind of primary ions and improves proportionally with a decrease of the primary ion energy. The SIMS results are compared with data of x-ray analysis of nitrogen concentration in GaAsN layers and with transmission electron microscopy analysis of the thickness of the layers. Taking into account the mechanism of GaAsN layer formation, experimental SIMS depth profiles of nitrogen are interpreted as resulting from a superposition of ultrathin GaAsN layers of thickness similar to 2.5 nm and diffusion profiles of 'excess' nitrogen formed during nitridation, Copyright (C) 2000 John Whey & Sons, Ltd MH - Mexico|Distrito Federal MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0142-2421 UR - ISI:000087837200008 L2 - depth profiling;depth resolution;SIMS;MOLECULAR-BEAM EPITAXY; DEPTH RESOLUTION; ENERGY; GROWTH SO - Surface and Interface Analysis 2000 ;29(6):399-402 1078 UI - 16653 AU - Kudriavtsev Y AD - State Tech Univ, St Petersburg, RussiaKudriavtsev, Y, IPN, CINVESTAV, Dept Ingn Elect SEES, Av Inst Politecn Nacl 2508,Apdo Postal 14-740, Mexico City 07300 14, DF, Mexico TI - Maximum concentration of implanted projectiles during ion sputtering AB - Implantation of primary ions during surface sputtering was considered. A simple equation for maximum concentration of implanted projectiles was developed. Several practical applications were performed with use of developed equation. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Letter AV - English IS - 0168-583X UR - ISI:000084704900015 L2 - sputtering;ion implantation;surface composition SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2000 ;160(2):307-310 1079 UI - 15533 AU - Kuhl U AU - Izrailev FW AU - Korkhin AA AU - Stockmann HJ AD - Univ Marburg, Fachbereich Phys, D-35032 Marburg, GermanyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoKuhl, U, Univ Marburg, Fachbereich Phys, Renthof 5, D-35032 Marburg, Germany TI - Experimental observation of the mobility edge in a waveguide with correlated disorder AB - The tight-binding model with correlated disorder introduced by Izrailev and Krokhin [Phys. Rev. Lett, 82, 4062 (1999)] has been extended to the Kronig-Penney model. The results of the calculations have been compared with microwave transmission spectra through a single-mode waveguide with inserted correlated scatterers, All predicted bands and mobility edges have been found in the experiment, thus demonstrating that any wanted combination of transparent and nontransparent frequency intervals can be realized experimentally by introducing appropriate correlations between scatterers. (C) 2000 American Institute of Physics. [S0003-6951(00)03929-2] MH - Germany MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 63 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000088580300009 L2 - LOCALIZATION; ABSENCE; STATES SO - Applied Physics Letters 2000 ;77(5):633-635 1080 UI - 16375 AU - Kumaran D AU - Ponnuswamy MN AU - Jayanthi G AU - Ramakrishnan VT AU - Panneerselvam K AU - Soriano-Garcia M AD - Univ Madras, Dept Crystallog & Biophys, Chennai 600025, IndiaUniv Madras, Dept Organ Chem, Chennai 600025, IndiaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoPonnuswamy, MN, Univ Madras, Dept Crystallog & Biophys, Guindy Campus, Chennai 600025, India TI - Crystal structure of 4-(2-chlorophenyl)-3-(4-methoxyphenyl)-1,2,4-triazole-5-thione AB - The title compound (C-15 H-12 N3OSCl) crystallizes in the monoclinic space group P2(1)/n with a = 11.211(3), b = 8.106(2), c = 17.494(4) Angstrom, beta = 104.49(2)degrees, V = 1539.2(7) Angstrom(3), Z = 4, D-cal = 1.371 Mg/m(3) at T = 293 K. The structure was solved by direct methods and refined by full-matrix least-squares procedures to final R = 0.046 and wR = 0.127 using 2185 reflections. The triazole ring is planar. The chlorophenyl ring is approximately perpendicular to the triazole ring whereas methoxy phenyl ring makes an angle of 154.2(1)degrees with it. The structure is stabilized by N-H ... S type of hydrogen bonds in addition to van der Waals forces MH - India MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 0232-1300 UR - ISI:000085931600012 SO - Crystal Research and Technology 2000 ;35(2):239-243 1081 UI - 15367 AU - Kummer U AU - Olsen LF AU - Dixon CJ AU - Green AK AU - Bornberg-Bauer E AU - Baier G AD - European Media Lab, D-69118 Heidelberg, GermanyOdense Univ, Phys Biochem Grp, DK-5230 Odense, DenmarkUniv Liverpool, New Med Sch, Dept Human Anat & Cell Biol, Liverpool L69 3GE, Merseyside, EnglandUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoKummer, U, European Media Lab, Villa Bosch,Schloss Wolfsbrunnenweg 33, D-69118 Heidelberg, Germany TI - Switching from simple to complex oscillations in calcium signaling AB - We present a new model for calcium oscillations based on experiments in hepatocytes. The model considers feedback inhibition on the initial agonist receptor complex by calcium and activated phospholipase C, as well as receptor type-dependent self-enhanced behavior of the activated G(alpha) subunit. It is able to show simple periodic oscillations and periodic bursting, and it is the first model to display chaotic bursting in response to agonist stimulations. Moreover, our model offers a possible explanation for the differences in dynamic behavior observed in response to different agonists in hepatocytes MH - Denmark MH - United Kingdom MH - Germany MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 53 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000089060900003 L2 - SINGLE-RAT HEPATOCYTES; INTRACELLULAR CA2+ OSCILLATIONS; CYTOPLASMIC FREE CALCIUM; CYTOSOLIC-FREE CA2+; PROTEIN-KINASE-C; INOSITOL 1,4,5-TRISPHOSPHATE; TEMPORAL ASPECTS; GENE-EXPRESSION; RECEPTOR; MODEL SO - Biophysical Journal 2000 ;79(3):1188-1195 1082 UI - 14672 AU - Kunchur MN AU - Ivlev BI AU - Christen DK AU - Phillips JM AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autronoma San Luis Potosi, San Luis Potosi, MexicoOak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831, USASandia Natl Labs, Albuquerque, NM 87185, USAKunchur, MN, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA TI - Vortex instability and the normal state at low temperatures AB - The motion of flux vortices in Y1Ba2Cu3O7-delta has been studied in the low temperature limit (T similar to 2% of T-c) at extreme current and dissipation densities (P/V similar to 10(9) W/cm(3)). Beyond the regime where flux motion is driven into free how, occurs an instability that seems to arise from a suppression of the order parameter. The critical resistivity at the point of instability is roughly twice the free-flux-flow value rho*/rho (n) similar to 2 rho (f) similar to 2B/H-c2, allowing an estimation of the illusive normal-state resistivity, p(n), in the zero-temperature limit. The estimated p(n) saturates to a finite residual value, like a conventional elemental superconductor, and the vortex dissipation continues to be finite as T --> 0 MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855700110 L2 - UPPER CRITICAL-FIELD; SUPERCONDUCTING LA2-XSRXCUO4; THIN-FILMS; FLUX-FLOW; YBA2CU3O7-DELTA; LAALO3(100); TRANSITION; BEHAVIOR; CORE SO - Physica C-Superconductivity and Its Applications 2000 ;341():1003-1006 1083 UI - 15918 AU - Kunchur MN AU - Ivlev BI AU - Christen DK AU - Phillips JM AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoOak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831, USASandia Natl Labs, Albuquerque, NM 87185, USAKunchur, MN, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA TI - Metallic normal state of Y1Ba2Cu3O7-delta AB - Flux flow was studied over an entire temperature range down to T similar to 2% of T-c by using intense pulsed current densities to overcome flux-vortex pinning. The resistivity at high vortex velocities is proportional to B and roughly follows rho similar to rho(n)B/H-c2, with a prefactor of order unity. Contrary to some speculation, rho(n) saturates to a finite residual value as T --> 0, indicating a metallic (rho --> finite) rather than insulating (rho --> infinity) normal state, and the vortex dissipation continues to be conventional as T --> 0 MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000087266300044 L2 - UPPER CRITICAL-FIELD; FLUX-FLOW; SUPERCONDUCTING LA2-XSRXCUO4; THIN-FILMS; YBA2CU3O7-DELTA; LAALO3(100); TRANSITION; BEHAVIOR; CORE SO - Physical Review Letters 2000 ;84(22):5204-5207 1084 UI - 15766 AU - Kupperman BD AU - Thomas EL AU - Graue F AU - de la Fuente MA AU - Quiroz-Mercado H AU - Guerrero JL AU - Giamporcaro JE AU - Guille SL AU - Reyes E AU - Shibuya R AD - Univ Calif Irvine, Dept Ophthalmol, Vitrase Phase IIb Study Grp, Irvine, CA, USARetina Vitreous Associates Med GRP, Los Angeles, CA, USAConde Valenciana, Mexico City, DF, MexicoLa Ceguera Hosp, Mexico City, DF, MexicoAdv Corneal Syst Inc, Irvine, CA, USA TI - Clearance of vitreous hemorrhage after intravitreal administration of hyaluronidase pre-clinical pharmacology and clinical outcomes MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246701813 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S346-S346 1085 UI - 16583 AU - Kushner L AU - Leme BT AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Fed Sao Carlos, BR-13560905 Sao Carlos, SP, BrazilKushner, L, Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Finite relative determination and relative stability AB - This paper is divided in three parts. The first part deals with the equivalence of finite determination on the right and finite relative determination (with respect to S) under some conditions on S. The second part deals with infinite determinacy (with respect to S; a germ of a closed set of R-n). Both generalize results of P. Porto [P] for a big family of closed subsets S of R-n. The third part is a special case which is quite interesting, when S coincides with the closure of its interior MH - Brazil MH - Mexico|Distrito Federal PB - BERKELEY: PACIFIC JOURNAL MATHEMATICS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0030-8730 UR - ISI:000085053300009 SO - Pacific Journal of Mathematics 2000 ;192(2):315-328 1086 UI - 15405 AU - Kushwaha MS AU - Djafari-Rouhani B AD - Univ Autonoma Puebla, Inst Phys, Puebla 72570, MexicoUniv Lille 1, UFR Phys, Lab Dynam & Struct Mat Mol, CNRS,URA 801, F-59655 Villeneuve Dascq, FranceKushwaha, MS, Univ Autonoma Puebla, Inst Phys, POB J-48, Puebla 72570, Mexico TI - Band-gap engineering in two-dimensional periodic photonic crystals AB - A theoretical investigation is made of the dispersion characteristics of plasmons in a two-dimensional periodic system of semiconductor (dielectric) cylinders embedded in a dielectric (semiconductor) background. We consider both square and hexagonal arrangements and calculate extensive band structures for plasmons using a plane-wave method within the framework of a local theory. It is found that such a system of semiconductor-dielectric composite can give rise to huge full band gaps (with a gap to midgap ratio approximate to 2) within which plasmon propagation is forbidden. The most interesting aspect of this investigation is the huge lowest gap occurring below a threshold frequency and extending up to zero. The maximum magnitude of this gap is defined by the plasmon frequency of the inclusions or the background as the case may be. In general we find that the greater the dielectric (and plasmon frequency) mismatch, the larger this lowest band gap. Whether or not some higher energy gaps appear, the lowest gap is always seen to exist over the whole range of filling fraction in both geometries. Just like photonic and phononic band-gap crystals, semiconducting band-gap crystals should have important consequences for designing useful semiconductor devices in solid state plasmas. (C) 2000 American Institute of Physics. [S0021-8979(00)04418-2] MH - France MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000088796500113 L2 - LOW-FREQUENCY PLASMONS; ELASTIC COMPOSITES; SUPERLATTICES; EXCITATIONS; POLARITONS SO - Journal of Applied Physics 2000 ;88(5):2877-2884 1087 UI - 15207 AU - Kuzin EA AU - Korneev N AU - Haus JW AU - Ibarra-Escamilla B AD - Univ Dayton, ElectroOpt Program, Dayton, OH 45469, USAINAOE, Puebla, MexicoHaus, JW, Univ Dayton, ElectroOpt Program, Dayton, OH 45469, USA TI - Polarization independent nonlinear fiber sagnac inteferometer AB - In general, the propagation of light in a twisted, birefringent fiber evolves with a period and phase change non-linearly dependent on the initial polarization state. We show both analytically and numerically that a critical value for the ratio of twist rate to birefringence can he chosen so that the period and nonlinear phase change are no longer sensitive to the input polarization state. This makes possible the design of a input-state independent Sagnac interferometer for mode-locked laser applications. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000089384700006 L2 - Sagnac interferometer;birefringent optical fibers;nonlinear phase change;OPTICAL LOOP MIRROR; TWISTED FIBER; ROTATION SO - Optics Communications 2000 ;183(5-6):389-393 1088 UI - 14655 AU - Lacomba EA AU - Llibre J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Autonoma Barcelona, Dept Matemat, E-08193 Barcelona, SpainLacomba, EA, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Apdo 55534, Mexico City 09340, DF, Mexico TI - On the dynamics and topology of the elliptic rectilinear restricted 3-body problem AB - We study a symmetric collinear restricted 3-body problem, where the equal mass primaries perform elliptic collisions, while a third massless body moves in the line between the primaries, during the time between two consecutive elliptic collisions. After desingularizing binary and triple collisions, we prove the existence of a transversal heteroclinic orbit beginning and ending in triple collision. This orbit is the unique homothetic orbit that the problem possess. Finally, we describe the topology of the compact extended phase space MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0923-2958 UR - ISI:000166047600001 L2 - 3-body problem;collinear restricted problem;regularization;COLLINEAR ONE-BUMPER; 2-BODY PROBLEM SO - Celestial Mechanics & Dynamical Astronomy 2000 ;77(1):1-15 1089 UI - 15829 AU - Lafuente JG AU - Vargas JM AU - Plaza F AU - Sarhan T AU - Candela J AU - Bascheck B AD - Univ Malaga, Dept Fis Aplicada 2, E-29071 Malaga, SpainCICESE, Ensenada, Baja California, MexicoUniv Kiel, Inst Meerskunden, D-24105 Kiel, GermanyLafuente, JG, Univ Malaga, Dept Fis Aplicada 2, E-29071 Malaga, Spain TI - Tide at the eastern section of the Strait of Gibraltar AB - From October 1995 to April 1996, three mooring lines were deployed at the eastern entrance of the Strait of Gibraltar. The spatial coverage of the mooring array allows for a good description of the tides. They exhibit a dominant semidiurnal nature and a noticeable baroclinic structure that matches the one of the mean exchange. Tidal currents in the upper layer are irregular and usually too weak to reverse the mean upper layer how that keeps on flowing east. Lower layer flow reverses with semidiurnal periodicity because of the smallness of the mean flow and the appreciable amplitude of the regular semidiurnal oscillation of tidal currents in this layer. Tidal transports can be satisfactorily compared with previous estimates of Bryden et al. [1994] if we allow for strong internal divergences associated with the internal tide. No significant eddy flux of water transport (tidal rectification) is observed at the eastern section, contrary to the almost 50% of the total layer transport found by Bryden et al. [1994] in Camarinal Sill section. Time-dependent hydraulic theory provides a good scenario for interpreting these two independent sets of observations despite the fact that the composite Froude number does not reach the critical values predicted in the hydraulic models most of the time MH - Germany MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 27 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000087627300017 L2 - MEDITERRANEAN-SEA; 2-LAYER EXCHANGE; OUTFLOW; FLOWS SO - Journal of Geophysical Research-Oceans 2000 ;105(C6):14197-14213 1090 UI - 14812 AU - Lagouarde JP AU - Chehbouni A AU - Bonnefond JM AU - Rodriguez JC AU - Kerr YH AU - Watts C AU - Irvine M AD - Unite INRA Bioclimatol, F-33883 Villenave Dornon, FranceIRD, IMADES, Hermosillo 83190, Sonora, MexicoCESBIO, CNES, CNRS, UPS, F-31401 Toulouse, FranceLagouarde, JP, Unite INRA Bioclimatol, BP 81, F-33883 Villenave Dornon, France TI - Analysis of the limits of the C-T(2)-profile method for sensible heat flux measurements in unstable conditions AB - We present a test of the C-T(2)-profile method described by Hill et al. [J. Atmos. Ocean. Technol. 9 (5) (1992) 526] to estimate the surface sensible heat flux over an homogeneous surface. A comparison with traditional eddy correlation measurements performed over a pasture (during the SALSA-Mexico experiment) using three identical large aperture scintillometers (LASs) along a 330 m propagation path and placed at heights 2.50, 3.45 and 6.45 m is first given. Scintillometer derived fluxes using the classical method at one level [Agric. For. Meteorol. 76 (1995) 149] reveal that the three scintillometers provide consistent measurements but underestimate by 15% the flux obtained with the 3D sonic anemometer. This is attributed to spatial non-homogeneities of the experimental site. Considerable scatter (and even the impossibility of performing computations) is found when using the C-T(2) -profile method which is particularly prone to errors in nearly neutral and highly unstable conditions. The sensitivity of these errors to the accuracy of scintillometer measurements, the calibration errors and the measurement heights is investigated numerically. Simulations are made assuming a normal distribution of the relative error for C-N(2) With standard deviations a between 2 and 5% and no calibration error in a first step. Only calibration errors (up to 4% between instruments) are simulated in a second step. They confirm that the profile method degrades very rapidly with the accuracy of C-N(2): for instance the RMS error for H reaches 68 W m(-2) land the cases of impossible computation 28%) for a realistic a = 5% value, with heights 2.50 and 3.45 m. Results appear slightly less sensitive to small calibration errors. The choice of the measurement heights z(1) and z(2) is also analysed: a ratio z(2)/z(1) similar to 3 or 4 with z(1) > 2m seems the best compromise to minimise errors in H. Nevertheless the accuracy of the profile method is always much lower than that given by the classical method using measurements at one level, provided a good estimate of roughness length is available. We conclude that the C-T(2)-profile method is not suitable for routine applications. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800014 L2 - atmospheric turbulence;sensible hear flux;optical scintillation;structure parameter;large aperture scintillometer;SCINTILLATION MEASUREMENTS; HETEROGENEOUS TERRAIN; INNER SCALE; SURFACE SO - Agricultural and Forest Meteorology 2000 ;105(1-3):195-214 1091 UI - 15655 AU - Lang F AU - Klingel K AU - Wagner CA AU - Stegen C AU - Warntges S AU - Friedrich B AU - Lanzendorfer M AU - Melzig J AU - Moschen I AU - Steuer S AU - Waldegger S AU - Sauter M AU - Paulmichl M AU - Gerke V AU - Risler T AU - Gamba G AU - Capasso G AU - Kandolf R AU - Hebert SC AU - Massry SG AU - Broer S AD - Univ Tubingen, Inst Physiol, Dept Physiol, D-72076 Tubingen, GermanyUniv Tubingen, Dept Mol Pathol, D-72076 Tubingen, GermanyUniv Tubingen, Dept Nephrol, D-72076 Tubingen, GermanyInnsbruck Univ, Dept Physiol, A-176010 Innsbruck, AustriaUniv Munster, Clin Res Grp Endothelial Cell Biol, D-48149 Munster, GermanyNatl Autonomous Univ Mexico, INNSZ, Mol Physiol Unit, Mexico City 14000, DF, MexicoNatl Autonomous Univ Mexico, IIB, Mexico City 14000, DF, MexicoUniv Naples, Dept Nephrol, I-80131 Naples, ItalyVanderbilt Univ, Sch Med, Div Nephrol, Nashville, TN 37232, USAUniv Calif Los Angeles, Sch Med, Dept Nephrol, Los Angeles, CA 90024, USAAustralian Natl Univ, Div Biochem & Mol Biol, Canberra, ACT 0200, AustraliaLang, F, Univ Tubingen, Inst Physiol, Dept Physiol, Gmelinstr 5, D-72076 Tubingen, Germany TI - Deranged transcriptional regulation of cell-volume-sensitive kinase hSGK in diabetic nephropathy AB - Transforming growth factor beta (TGF-beta) has been shown to participate in the pathophysiology of diabetic complications. As shown most recently, TGF-beta stimulates the expression of a distinct serine/threonine kinase (hSGK) which had previously been cloned as an early gene transcriptionally regulated by cell volume alterations. The present study was performed to elucidate transcription and function of hSGK in diabetic nephropathy. As shown by Northern blotting, an increase of extracellular glucose concentration increased hSGK mRNA levels in cultured cells, an effect qualitatively mimicked by osmotic cell shrinkage or treatment with TGF-beta (2 mu g/liter), phorbol 12,13-didecanoate (1 mu M), or the Ca2+ ionophore ionomycin (1 CIM) and blunted by high concentrations of nifedipine (10 and 100 mu M). In situ hybridization revealed that hSGK transcription was markedly enhanced in diabetic nephropathy, with particularly high expression in mesangial cells, interstitial cells, and cells in thick ascending limbs of Henle's loop and distal tubules. According to voltage clamp and tracer flux studies in Xenopus oocytes expressing the renal epithelial Na+ channel ENaC or the mouse thick ascending limb Na+,K+,2Cl(-) cotransporter BSC-1, coexpression with hSGK stimulated ENaC and BSC-1 11-fold and 6-fold, respectively, effects reversed by kinase inhibitors staurosporine (1 mu M) and chelerythrine (1 mu M) and not elicited by inactive hSGK. In conclusion, excessive extracellular glucose concentrations enhance hSGK transcription, which in turn stimulates renal tubular Na+ transport. These observations disclose an additional element in the pathophysiology of diabetic nephropathy MH - Australia MH - Austria MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 118 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000088048400089 L2 - protein kinase C;endothelial cells;kidney;epithelial Na+ channel;Na+,K+,2Cl(-) cotransporter;GROWTH-FACTOR-BETA; EPITHELIAL SODIUM-CHANNEL; GLOMERULAR MESANGIAL CELLS; PROTEIN-KINASE; TGF-BETA; TRANSFORMING GROWTH-FACTOR-BETA-1; GLUCOSE-CONCENTRATION; ALDOSE REDUCTASE; GENE-EXPRESSION; NA+ CHANNELS SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(14):8157-8162 1092 UI - 15499 AU - Lara-Gonzalez S AU - Dixon HBF AU - Mendoza-Hernandez G AU - Altamirano MM AU - Calcagno ML AD - MRC, Ctr Prot Engn, Cambridge CB2 2QH, EnglandNatl Autonomous Univ Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Cambridge, Dept Biochem, Cambridge CB2 1QW, EnglandAltamirano, MM, MRC, Ctr Prot Engn, Hills Rd, Cambridge CB2 2QH, England TI - On the role of the N-terminal group in the allosteric function of glucosamine-6-phosphate deaminase from Escherichia coli AB - Glucosamine-6-phosphate deaminase (EC 3.5.99.6) from Escherichia coli is an allosteric enzyme of the K-type, activated by N-acetylglucosamine 6-phosphate. It is a homohexamer and has six allosteric sites located in clefts between the subunits. The amino acid side-chains in the allosteric site involved in phosphate binding are Arg158, Lys160 and Ser151 from one subunit and the N-terminal amino group from the facing polypeptide chain. To study the functional role of the terminal amino group, we utilized a specific non-enzymic transamination reaction, and we further reduced the product with borohydride, to obtain the corresponding enzyme with a terminal hydroxy group. Several experimental controls were performed to assess the procedure, including reconditioning of the enzyme samples by refolding chromatography. Allosteric activation by N-acetylglucosamine 6-phosphate became of the K-V mixed type in the transaminated protein. Its kinetic study suggests that the allosteric equilibrium for this modified enzyme is displaced to the R state, with the consequent loss of co-operativity. The deaminase with a terminal hydroxy acid, obtained by reducing the transaminated enzyme, showed significant recovery of the catalytic activity and its allosteric activation pattern became similar to that found for the unmodified enzyme. It had lost, however, the pH-dependence of homotropic co-operativity shown by the unmodified deaminase in the pH range 6-8. These results show that the terminal amino group plays a part in the co-operativity of the enzyme and, more importantly, indicate that the loss of this cooperativity at low pH is due to the hydronation of this amino group. (C) 2000 Academic Press MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0022-2836 UR - ISI:000088705300018 L2 - N-terminal transamination;allosteric transition;allosteric-site chromatography;terminal hydroxy acid;refolding chromatography;REFOLDING CHROMATOGRAPHY; MECHANISM; RESOLUTION; ISOMERASE SO - Journal of Molecular Biology 2000 ;301(1):219-227 1093 UI - 15251 AU - Lara-Ochoa F AU - Garcia MM AU - Teran R AU - Almaza RC AU - Espinosa-Perez G AU - Chen G AU - Silaghi-Dumitrescu I AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R ChinaUniv Babes Bolyai, Dept Chem, RO-3400 Cluj Napoca, RomaniaGarcia, MM, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - A new tubular arrangement of a dimethylsilyl bridged calix[4] resorcinarene AB - The functionalization of calix[4]resorcinarene 1 (R-1 = H, R-2 = Me) with dichlorodimethylsilane leads to the formation of the dimethylsilyl-bridged cavitand 2 which, during the work up of the reaction product, encapsulates a molecule of water. 2 H2O crystallizes in the C2/c system (a = 23.892 Angstrom, b = 8.493 Angstrom, c = 43.035 Angstrom, beta = 100.05 degrees reflections: 5385, 2376 (F > 4.0 sigma(F)), R = 9.17%, calculated density = 1.213 Mg/m(3)) with eight molecules per unit cell. The main feature of the crystal packing is the alternating pairs of up-down disposed cavitands along the c direction and well developed columns in the b direction. The molecules of water are completely encapsulated, but there are some close contacts with the methylene bridge from the upper molecule. Molecular orbital calculations show that the lowest energy conformer of cavitand 2 is that with all four silicon atoms oriented inward and the energies of the other conformers are so high that they cannot be accessed at normal temperature. Ab initio calculated electrostatic potentials correlate well with the relative positions of the cavitands in the crystal structure MH - Mexico|Distrito Federal MH - Peoples R China MH - Romania PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1061-0278 UR - ISI:000089237400003 L2 - crystal structure;functionalized calix[4]resorcinarene;molecular structure;AM1;ab initio molecular orbital;supramolecular packing;HOST-GUEST COMPLEXATION; X-RAY; CAVITANDS; CONDENSATION; BINDING; DERIVATIVES; CHEMISTRY; CAVITIES; BONDS; MODEL SO - Supramolecular Chemistry 2000 ;11(4):263-273 1094 UI - 16095 AU - Lara J AU - Surerus KK AU - Kotvis PV AU - Contreras ME AU - Rico JL AU - Tysoe WT AD - Univ Wisconsin, Dept Chem, Milwaukee, WI 53211, USAUniv Wisconsin, Surface Studies Lab, Milwaukee, WI 53211, USABenz Oil, Milwaukee, WI 53209, USAUniv Michoacana, Inst Invest Met, Morelia, Michoacan, MexicoTysoe, WT, Univ Wisconsin, Dept Chem, POB 413, Milwaukee, WI 53211, USA TI - The surface and tribological chemistry of carbon disulfide as an extreme-pressure additive AB - The reaction of carbon disulfide with clean iron was investigated for temperatures between 623 and 776 K and pressures between 10 and 30 Torr. Film growth is limited by the thermal decomposition of CS2 at the growing interface and the activation energy for this process is 12.4 +/- 1.0 kcal/mol. The nature of the resulting film is analyzed using Raman and Mossbauer spectroscopies and by X-ray diffraction, where it is found that the film consists of a non-stoichiometric ferrous sulfide and also incorporates a carbide. This result is in accord with the tribological data where the interfacial temperature in the plateau region of a plot of seizure load vs. additive concentration is similar to 1460 K, the melting temperature of FeS. The seizure load increases substantially when the additive concentration exceeds similar to 2 wt.% of sulfur and, since carbide formation was detected in the film, this is ascribed to the formation of an iron carbide at higher additive concentrations. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Michoacan MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Mechanical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0043-1648 UR - ISI:000086683200009 L2 - carbon disulfide;iron;Raman spectroscopy;Mossbauer spectroscopy;X-ray diffraction;film growth kinetics;extreme-pressure lubrication;THERMAL-DECOMPOSITION; DIBENZYL DISULFIDE; RAMAN-SPECTROSCOPY; IRON; SULFIDE; FILMS; ADSORPTION; TROILITE; SULFUR SO - Wear 2000 ;239(1):77-82 1095 UI - 15311 AU - Laska M AU - Salazar LTH AU - Luna ER AD - Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, GermanyUniv Veracruzana, Inst NeuroEtol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Med Psychol, Goethestr 31, D-80336 Munich, Germany TI - Food preferences and nutrient composition in captive spider monkeys, Ateles geoffroyi AB - We assessed the occurrence of food preferences in captive spider monkeys and analyzed whether their preferences correlate with nutrient composition. Using a two-alternative choice test, we repeatedly presented 7 Ateles geoffroyi with all possible binary combinations of 12 types of food that are part of their diet in captivity. They exhibited the following rank order of preference: avocado > sapodilla > pineapple, mango > papaya > melon > banana > apple > tomato > orange > carrot > cucumber. Correlational analyses revealed that this preference ranking is significantly positively correlated with total energy content, irrespective of the source of energy as neither total carbohydrate content nor protein or lipid content is significantly correlated with food preference. Further, food preferences are significantly negatively correlated with water content and positively correlated with the content of magnesium, copper and manganese. These results suggest that despite their high degree of frugivory and high taste sensitivity for soluble carbohydrates, spider monkeys are opportunistic feeders with regard to maximizing net gain of energy MH - Germany MH - Mexico|Veracruz PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 13 U4 - Zoology U5 - J;Article AV - English IS - 0164-0291 UR - ISI:000089151500006 L2 - food preferences;nutrient composition;frugivory;spider monkeys;Ateles geoffroyi;SEASONAL-VARIATION; DIETARY-RESPONSE; FRUIT ABUNDANCE; PRIMATES; CERCOPITHECINES; CHIMPANZEES; SELECTION; BABOONS; CHOICE SO - International Journal of Primatology 2000 ;21(4):671-683 1096 UI - 16031 AU - Laska M AU - Salazar LTH AU - Luna ER AU - Hudson R AD - Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuro Etol, Xalapa 91000, Veracruz, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoLaska, M, Univ Munich, Sch Med, Dept Med Psychol, Goethestr 31, D-80336 Munich, Germany TI - Gustatory responsiveness to food-associated acids in the spider monkey (Ateles geoffroyi) AB - The gustatory responsiveness of four adult spider monkeys to five food-associated acids was assessed in two-bottle preference tests of brief duration (3 min). The animals were given the choice between a 30 mM sucrose solution and defined concentrations of citric acid, ascorbic acid, malic acid, acetic acid, or tannic acid dissolved in a 30 mM sucrose solution. With this procedure, Ateles geoffroyi was found to significantly discriminate concentrations as low as 5 mM ascorbic acid, citric acid, and acetic acid, 10 mM malic acid, and 0.1 mM tannic acid from the alternative stimulus. With the latter two substances, the monkeys rejected all suprathreshold concentrations tested, whereas with the former three substances, the animals showed an inverted U-shaped function of preference, i.e. they rejected high concentrations, but significantly preferred low but detectable concentrations of these acidic tastants over the alternative sweet stimulus. The results showed (1) the spider monkey to respond to the same range of acid concentrations as other nonhuman primate species; (2) that Ateles geoffroyi is able to detect food-associated acids at concentrations well below those present in most fruits; and (3) that unlike most other primate species tested so far, spider monkeys do not generally reject acidic tastants but show a substance- and concentration-dependent change in responsiveness that may range from rejection to preference. The results support the assumptions that spider monkeys may use sourness and/or astringency of food-associated acids as a criterion for food selection, and that the gustatory responsiveness of Ateles geoffroyi to acidic tastants might reflect an evolutionary adaptation to frugivory MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - INUYAMA AICHI: JAPAN MONKEY CENTRE RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0032-8332 UR - ISI:000086858600011 L2 - gustatory preference thresholds;taste sensitivity;acidic compounds;spider monkey;Ateles geoffroyi;TASTE DIFFERENCE THRESHOLDS; SAIMIRI-SCIUREUS; PRIMATES; SUGARS; PREFERENCES; SUCROSE SO - Primates 2000 ;41(2):213-221 1097 UI - 15950 AU - Lastras-Martinez LF AU - Ruf T AU - Konuma M AU - Cardona M AU - Aspnes DE AD - Max Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyUniv Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi, MexicoN Carolina State Univ, Dept Phys, Raleigh, NC 27695, USALastras-Martinez, LF, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany TI - Isotopic effects on the dielectric response of Si around the E-1 gap AB - The effect of isotopic composition on the dielectric function of silicon from 3.1 to 3.7 eV has been investigated using spectroscopic ellipsometric data obtained on Si-28, natural Si (Si-nat, M-nat = 28.09 amu), and Si-30 crystals. At low temperatures, the energies of the E-0' and E-1 interband transitions, which occur in the energy range under study, become mass dependent through the dependence of the electron-phonon interaction and the lattice parameter on the average isotopic mass. We determine the mass dependence of critical point energies and other optical parameters as accurately as possible by analyzing the ellipsometric data in reciprocal (Fourier-inverse) rather than direct (frequency) space. The obtained dependence of the critical point energy versus isotope mass [Delta E-1/Delta M= +1.9(4) meV/amu] is in reasonable agreement with estimated values obtained from the temperature dependence of E-1 in natural silicon MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000087159100073 L2 - AB-INITIO CALCULATION; LATTICE-CONSTANT; OPTICAL-SPECTRA; TEMPERATURE-DEPENDENCE; FOURIER METHODS; CRITICAL-POINTS; ENERGY-GAP; BAND-GAPS; SEMICONDUCTORS; GERMANIUM SO - Physical Review B 2000 ;61(19):12946-12951 1098 UI - 16125 AU - Latulippe ME AU - Rosas MG AU - Villalpando S AU - Picciano MF AD - Penn State Univ, University Pk, PA 16802, USAIMSS, Mexico City, DF, Mexico TI - Utility of TfR and TfR-ferritin index for assessment of iron deficiency is not complicated by folate deficiency in lactating women MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918102939 SO - Faseb Journal 2000 ;14(4):A508-A508 1099 UI - 14431 AU - Laundre JW AU - Hernandez L AU - Streubel D AU - Altendorf K AU - Gonzalez CL AD - Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USAInst Ecol, Xalapa, Veracruz, MexicoInst Ecol, Ac Aldama, Chih, MexicoLaundre, JW, Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USA TI - Aging mountain lions using gum-line recession AB - The ability to accurately age mountain lions (Puma concolor) would be a valuable tool for management. However, no reliable or standardized technique is currently available. We tested the accuracy of using gum recession as an aging technique. We measured gum recession of the upper canine teeth in 13 known-age individuals (12 females, 1 male). Cum recession was significantly related to age in months (R-2=81.0, t(28)=10.16, P<0.001), The 95% confidence intervals for age estimations of lions based on gum recession ranged from +/-0.5 to 1.3 years. Cum recession appears to provide reasonably accurate ages for free-roaming mountain lions MH - Mexico|Chihuahua MH - Mexico|Veracruz MH - USA PB - BETHESDA: WILDLIFE SOC RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Zoology U5 - J;Article AV - English IS - 0091-7648 UR - ISI:000166582600026 L2 - aging;gum recession;Idaho;mountain lion SO - Wildlife Society Bulletin 2000 ;28(4):963-966 1100 UI - 15839 AU - Launois P AU - Moret R AU - de Souza NR AU - zamar-Barrios JA AU - Penicaud A AD - Univ Paris Sud, Phys Solides Lab, F-91405 Orsay, FranceUniv Bordeaux 1, Ctr Rech Paul Pascal, F-33600 Pessac, FranceCINVESTAV, Merida 97310, Yuc, MexicoLaunois, P, Univ Paris Sud, Phys Solides Lab, Batiment 510, F-91405 Orsay, France TI - Ordering phenomena in C-60-tetraphenylphosphonium bromide AB - The fulleride salt Cco-tetraphenylphosphonium bromide is investigated as a function of temperature ky single crystal X-ray diffuse scattering and diffraction.. At room temperature, the C-60 orientational disorder is found to be more complex than previously expected, Moreover, a structural phase transition. due to the C60 orientational ordering, is evidenced around 120 K. Its relation with the stabilization of a static Jahn-Teller effect is discussed MH - France MH - Mexico|Yucatan PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000087726100005 L2 - JAHN-TELLER DISTORTION; ELECTRON-VIBRON INTERACTIONS; RAY DIFFUSE-SCATTERING; CHARGED FULLERENES; SPIN-RELAXATION; SINGLE-CRYSTALS; SOLID C-60; FULLERIDES; ANION; ELECTROCRYSTALLIZATION SO - European Physical Journal B 2000 ;15(3):445-450 1101 UI - 15138 AU - Lauziere I AU - Perez-Lachaud G AU - Brodeur J AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Laval, Dept Phytol, St Foy, PQ G1K 7P4, CanadaPerez-Lachaud, G, En Naurous, F-31590 Verfeil, France TI - Effect of female body size and adult feeding on the fecundity and longevity of the parasitoid Cephalonomia stephanoderis Betrem (Hymenoptera : Bethylidae) AB - The influence of female body size and adult feeding on the fecundity and longevity of female Cephalonomia stephanoderis Betrem (Hymenoptera: Bethylidae), attacking the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), was examined under laboratory conditions. Size and fecundity were positively correlated, whereas size had no influence on longevity of females continually provided with hosts. In contrast to theoretical models of host feeding, host feeding rate in C. stephanoderis increased over the parasitoid's lifespan, whereas oviposition rate decreased with age. The oviposition rate was higher and the oviposition period longer in large females than in small ones. As C. stephanoderis grew older, egg and sperm exhaustion were observed, especially in small females where a single mating was not sufficient for fertilization of all the eggs deposited during their lifetime. Developmental mortality of the offspring of small females was higher compared with large females, which may be attributed to a greater ability of large females to subdue and parasitize coffee berry borer pupae. Host feeding, by itself, promoted female survival. All host stages enhanced wasp longevity, but eggs and pupae were the most effective host stages in increasing longevity. Our findings have significant implications in mass rearing and management programs by determining conditions likely to improve parasitoid production and defining desirable biological attributes of C. stephanoderis,lis as a biological control agent of the coffee berry borer MH - Canada MH - France MH - Mexico|Chiapas PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000089631600014 L2 - Bethylidae;Cephalonomia;Scolytidae;Hypothenemus;body size;host feeding;COFFEE BERRY BORER; CATOLACCUS-GRANDIS HYMENOPTERA; APHYTIS-MELINUS; ASOBARA-TABIDA; FITNESS; STRATEGIES; FIELD; REPRODUCTION; PTEROMALIDAE; EVOLUTION SO - Annals of the Entomological Society of America 2000 ;93(1):103-109 1102 UI - 16251 AU - Lawton-Rauh AL AU - varez-Buylla ER AU - Purugganan MD AD - N Carolina State Univ, Dept Genet, Raleigh, NC 27695, USAUniv Nacl Autonoma Mexico, Lab Genet Mol & Evoluc, Inst Ecol, Mexico City 04510, DF, MexicoLawton-Rauh, AL, N Carolina State Univ, Dept Genet, Box 7614, Raleigh, NC 27695 USA TI - Molecular evolution of flower development AB - Flowers, as reproductive structures of the most successful group of land plants, have been a central focus of study for both evolutionists and ecologists. Recent advances in unravelling the genetics of flower development have provided insight into the evolution of floral structures among angiosperms, The study of the evolution of genes that control floral morphogenesis permits us to draw inferences on the diversification of developmental systems, the origin of floral organs and the selective forces If hat drive evolutionary change among these plant reproductive structures MH - Mexico|Distrito Federal MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 33 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Review AV - English IS - 0169-5347 UR - ISI:000086146200009 L2 - MADS-BOX GENES; ARABIDOPSIS FLOWER; PLANT DEVELOPMENT; HOMEOTIC GENES; SEED PLANTS; APETALA3; LINEAGES; GENETICS; FAMILY; ROLES SO - Trends in Ecology & Evolution 2000 ;15(4):144-149 1103 UI - 16369 AU - Lazaro-Mancilla O AU - Gomez-Trevino E AD - CICESE, Dept Geofis Aplicada, Ensenada 22800, Baja California, MexicoLazaro-Mancilla, O, CICESE, Dept Appl Geophys, POB 434843, San Diego, CA 92143 USA TI - Ground penetrating radar inversion in 1-D: an approach for the estimation of electrical conductivity, dielectric permittivity and magnetic permeability AB - This paper presents a method for inverting ground penetrating radargrams in terms of one-dimensional profiles. We resort to a special type of linearization of the damped E-field wave equation to solve the inverse problem. The numerical algorithm for the inversion is iterative and requires the solution of several forward problems, which we evaluate using the matrix propagation approach. Analytical expressions for the derivatives with respect to physical properties are obtained using the self-adjoint Green's function method. We consider three physical properties of materials; namely dielectrical permittivity, magnetic permeability and electrical conductivity. The inverse problem is solved minimizing the quadratic norm of the residuals using quadratic programming optimization. In the iterative process to speed up convergence we use the Levenberg-Mardquardt method. The special type of linearization is based on an integral equation that involves derivatives of the electric field with respect to magnetic permeability, electrical conductivity and dielectric permittivity; this equation is the result of analyzing the implication of the scaling properties of the electromagnetic field. The ground is modeled using thin horizontal layers to approximate general variations of the physical properties. We show that standard synthetic radargrams due to dielectric permittivity contrasts can be matched using electrical conductivity or magnetic permeability variations. The results indicate that it is impossible to differentiate one property from the other using GPR data. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary;Mining & Mineral Processing U5 - J;Article AV - English IS - 0926-9851 UR - ISI:000085933000009 L2 - ground penetrating radar;Frechet derivatives;inverse problem;parameter estimation;quadratic programming SO - Journal of Applied Geophysics 2000 ;43(2-4):199-213 1104 UI - 15906 AU - Lazio TJW AU - Fey AL AU - Dennison B AU - Mantovani F AU - Simonetti JH AU - Alberdi A AU - Foley AR AU - Fiedler R AU - Garrett MA AU - Hirabayashi H AU - Jauncey DL AU - Johnston KJ AU - Marcaide J AU - Migenes V AU - Nicolson GD AU - Venturi T AD - USN, Res Lab, Washington, DC 20375, USAUSN Observ, Washington, DC 20392, USAVirginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061, USACNR, Ist Radioastron, I-40129 Bologna, ItalyCSIC, Inst Astrofis Andalucia, Granada, SpainNetherlands Fdn Res Astron, NL-7990 AA Dwingeloo, NetherlandsJoint Inst VLBI, NL-7990 AA Dwingeloo, NetherlandsInst Space & Astronaut Sci, Sagamihara, Kanagawa 229, JapanAustralia Telescope Natl Facil, Epping, NSW 2121, AustraliaUniv Valencia, Dept Astron, E-46100 Burjassot, SpainUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoHartebeesthoek Radio Astron Observ, ZA-1740 Krugersdorp, South AfricaLazio, TJW, USN, Res Lab, Code 7213, Washington, DC 20375, USA TI - The extreme scattering event toward PKS 1741-038: VLBI images AB - We report multiepoch VLBI observations of the source PKS 1741-038 (OT 068) as it underwent an extreme scattering event (ESE). Observations at four epochs were obtained, and images were produced at three of these. One of these three epochs was when the source was near the minimum flux density of the ESE, the other two were as the flux density of the source was returning to its nominal value. The fourth epoch was at the maximum flux density during the egress from the ESE, but the VLBI observations had too few stations to produce an image. During the event the source consisted of a dominant, compact component, essentially identical to the structure seen outside the event. However, the source's diameter increased slightly at 13 cm, from near 0.6 mas outside the ESE to near 1 mas during the ESE. An increase in the source's diameter is inconsistent with a simple refractive model in which a smooth refractive lens drifted across the line of sight to PKS 1741-038. We also see no evidence for ESE-induced substructure within the source or the formation of multiple images, as would occur in a strongly refractive lens. However, a model in which the decrease in flux density during the ESE occurs solely because of stochastic broadening within the lens requires a larger broadening diameter during the event than is observed. Thus, the ESE toward PKS 1741-038 involved both stochastic broadening and refractive defocusing within the lens. If the structure responsible for the ESE has a size of order I AU, the level of scattering within an ESE lens may be a factor of 10(7) larger than that in the ambient medium. A filamentary structure could reduce the difference between the strength of scattering in the lens and ambient medium, but there is no evidence for a refractively induced elongation of the source. We conclude that, if ESEs arise from filamentary structures, they occur when the filamentary structures are seen lengthwise. We are able to predict the amount of pulse broadening that would result from a comparable lens passing in front of a pulsar. The pulse broadening would be no more than 1.1 mu s, consistent with the lack of pulse broadening detected during ESEs toward the pulsars PSR B1937+21 and PSR J1643-1224. The line of sight toward PKS 1741-038 is consistent with a turbulent origin for the structures responsible for ESEs. The source PKS 1741-038 lies near the radio Loop I and is seen through a local minimum in 100 mu m emission MH - Australia MH - Italy MH - Japan MH - Mexico|Guanajuato MH - Netherlands MH - South Africa MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087429400017 L2 - ISM : general;quasars : individual (1741-038);radio continuum : ISM;scattering;REFERENCE FRAME SOURCES; COMPACT RADIO-SOURCES; INTERSTELLAR-MEDIUM; PLASMA; SCINTILLATION; SPECTRUM; DENSITY; MHZ SO - Astrophysical Journal 2000 ;534(2):706-717 1105 UI - 15471 AU - Leal-Klevezas DS AU - Martinez-Soriano JP AU - Nazar RN AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Mol Med, Guadalajara 44340, Jalisco, MexicoCtr Invest & Estudios Avanzados, Unidad Biotechnol & Ingn Genet Plantas, Guanajuato, MexicoUniv Guelph, Dept Mol Biol & Genet, Guelph, ON N1G 2W1, CanadaLeal-Klevezas, DS, Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Mol Med, Sierra Mojada 800,Colonia Independencia,AP 3838, Guadalajara 44340, Jalisco, Mexico TI - Cotranscription of 5S rRNA-tRNA(Arg)(ACG) from Brassica napus chloroplasts and processing of their intergenic spacer AB - S1 mapping showed that at least a significant portion of the 5S rRNA and tRN(Arg)(ACG) is co-transcribed in canola chloroplast, making trnR the last gene transcribed in an operon of which the final sequence is 5'-16S-tRNA(Ile)-tRNA(Ala)-23S-4.5S-5S-tRNA(Arg)-3'. Various RNA termini representing RNA processing sites at several parts of the 5S rRNA-tRNA(Arg) area were detected. This gene spacer is substantially conserved among various species compared here, and a secondary structure model for this chloroplast region in canola applies to other plant sequences. The conservation of this intergenic sequence suggests a functional role, possibly by providing recognition structures for endogenous RNases involved in its maturing process. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Guanajuato MH - Mexico|Jalisco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0378-1119 UR - ISI:000088812800020 L2 - intergenic transcribed sequence;ITS;maturation;ribosomal RNA;transfer RNA;trnR;TRANSFER RIBONUCLEIC-ACID; TRANSFER-RNA; NUCLEOTIDE-SEQUENCE; RIBOSOMAL-RNA; TRANSCRIPTION SYSTEM; SPIRODELA-OLIGORHIZA; GENES; ORGANIZATION; ACG; DNA SO - Gene 2000 ;253(2):303-311 1106 UI - 15657 AU - Leal-Klevezas DS AU - Martinez-Soriano JP AU - Nazar RN AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Guadalajara 44340, Jalisco, MexicoCtr Invest & Estudios Avanzados, Unidad Biotecnol & Ingn Genet Plantas, Irapuato 36500, Gto, MexicoUniv Guelph, Dept Mol Biol & Genet, Guelph, ON N1G 2W1, CanadaLeal-Klevezas, DS, Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Sierra Mojada 800,Colonia Independencia, Guadalajara 44340, Jalisco, Mexico TI - Transcription and processing map of the 4.5S-5S rRNA intergenic region (ITS3) from rapeseed (Brassica napus) chloroplasts AB - S1-nuclease mapping experiments performed in this work established that 4.5S rRNA and 5S rRNA are co-transcribed in rapeseed chloroplasts. Several RNA termini representing processing sites at various parts of the intergenic transcribed spacers were detected. Our data shows that there is a processing order of specific endoribonucleolytic actions. Intergenic spacers are substantially conserved among various species compared here and a secondary structure model for this chloroplast region in Brassica napus can be applied to other known plant sequences. The conservation of those sequences suggests a functional role for them possibly by providing recognition structures for endogenous RNases involved in the 4.5S rRNA-5S rRNA maturing process. Most of the processing signals detected here are located at single-stranded regions of a proposed secondary structure MH - Canada MH - Mexico|Guanajuato MH - Mexico|Jalisco PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0721-7714 UR - ISI:000088156600005 L2 - rRNA operon;rRNA transcription;rRNA processing;S1 mapping;5S RIBOSOMAL-RNA; NUCLEOTIDE-SEQUENCE; 4.5-S SO - Plant Cell Reports 2000 ;19(7):667-673 1107 UI - 14618 AU - Lederman MM AU - Valdez H AU - Medvik K AU - Dorazio D AU - Asaad R AU - Pacheko C AU - Sierra-Vladero J AD - Case Western Reserve Univ, Cleveland, OH 44106, USAInst Nutr, Mexico City, DF, Mexico TI - Functional significance of CD4 cell numbers on the way down versus on the way up MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Virology U5 - J;Meeting Abstract AV - English IS - 0269-9370 UR - ISI:000165192300027 SO - Aids 2000 ;14():S9-S9 1108 UI - 15475 AU - Ledig FT AU - Bermejo-Velazquez B AU - Hodgskiss PD AU - Johnson DR AU - Flores-Lopez C AU - Jacob-Cervantes V AD - US Forest Serv, Inst Forest Genet, Pacific SW Res Stn, USDA, Placerville, CA 95667, USAUniv Autonoma Chapingo, Ctr Genet Forestal, Chapingo 56230, Mexico, MexicoLedig, FT, US Forest Serv, Inst Forest Genet, Pacific SW Res Stn, USDA, 2480 Carson Rd, Placerville, CA 95667 USA TI - The mating system and genic diversity in Martinez spruce, an extremely rare endemic of Mexico's Sierra Madre Oriental: an example of facultative selfing and survival in interglacial refugia AB - Martinez spruce (Picea martinezii T.F. Patterson) is a conifer currently passing through a bottleneck, reduced to a few relict populations totaling less than 800 trees. We used isozyme markers to analyze the mating system and survey the level of genic diversity in two populations. The mating system was characterized by a high frequency of selfing. The multilocus outcrossing rates (t(m)) and 95% confidence intervals were only 0.399 (0.197 < t(m) < 0.601) for the smallest population and 0.589 (0.475 < t(m) < 0.703) or 0.685 (0.465 < t(m) < 0.905), depending on year, for the largest. These are among the lowest rates of outcrossing observed in conifers. The fixation indices for the two populations were -0.058 and 0.121, less than expected for such high levels of selfing. Expected heterozygosity, unbiased H-e, based on 22 loci in 13 enzyme systems, was 0.121 and 0.101 in the two populations. The proportion of the total genic diversity between populations, F-ST, was 2.4%. Nm, the number of migrants per generation, was about 1.00 or 10.17, depending on the method of estimation. The time since the two populations were isolated was estimated from Nei's genetic distance as only 150 to 15 000 years, which is consistent with a hypothesis of population collapse during late Pleistocene or Holocene warming. We discuss the implications for conservation MH - USA MH - Mexico|Estado De Mexico PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 15 U4 - Forestry U5 - J;Article AV - English IS - 0045-5067 UR - ISI:000088712600014 L2 - POPULATION-STRUCTURE; GENETIC-STRUCTURE; WHITE SPRUCE; INBREEDING DEPRESSION; NATURAL-POPULATIONS; SEED PRODUCTION; PICEA-GLAUCA; FERTILIZATION; PINE; DIFFERENTIATION SO - Canadian Journal of Forest Research-Revue Canadienne de Recherche Forestiere 2000 ;30(7):1156-1164 1109 UI - 16444 AU - Lee H AU - Richer MG AU - Mccall ML AD - York Univ, Dept Phys & Astron, N York, ON M3J 1P3, CanadaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoLee, H, York Univ, Dept Phys & Astron, 4700 Keele St, N York, ON M3J 1P3, Canada TI - The dwarf irregular galaxy UGC 7636 exposed: Stripping at work in the Virgo Cluster AB - We present the results of optical spectroscopy of a newly discovered H II region residing in the H I gas cloud located between the dwarf irregular galaxy UGC 7636 and the giant elliptical galaxy NGC 4472 in the Virgo Cluster. By comparing UGC 7636 with dwarf irregular galaxies in the field, we show that the H I cloud must have originated from UGC 7636 because (1) the oxygen abundance of the cloud agrees with that expected for a galaxy with the blue luminosity of UGC 7636 and (2) MHI/LB for UGC 7636 becomes consistent with the measured oxygen abundance of the cloud if the H I mass of the cloud is added back into UGC 7636, It is likely that tides from NGC 4472 first loosened the H I gas, after which ram pressure shipping removed the gas from UGC 7636 MH - Canada MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000085704800005 L2 - galaxies : abundances;galaxies : evolution;galaxies : individual (UGC 7636);galaxies : irregular;GIANT ELLIPTIC GALAXY; H-II REGIONS; STAR-FORMATION; X-RAY; NGC-4472; UGC-7636; ABUNDANCES; AREA; GAS SO - Astrophysical Journal 2000 ;530(1):L17-L20 1110 UI - 16055 AU - Legrand F AU - Kunth D AU - Roy JR AU - Mas-Hesse JM AU - Walsh JR AD - CNRS, Inst Astrophys, F-75014 Paris, FranceUniv Laval, Dept Phys, Quebec City, PQ G1K 7P4, CanadaUniv Laval, Observat Mont Megant, Quebec City, PQ G1K 7P4, CanadaINTA, LAEFF, Madrid 28080, SpainEuropean So Observ, D-85748 Garching, GermanyInst Nacl Astrofis Opt & Elect, Puebla, MexicoLegrand, F, CNRS, Inst Astrophys, 98 Bis Blvd Arago, F-75014 Paris, France TI - A continuous low star formation rate in IZw 18? AB - Deep long-slit spectroscopic observations of the blue compact galaxy IZw 18 obtained with the CFH 3.6 m Telescope are presented. The very low value of oxygen abundance previously reported is confirmed and a very homogeneous abundance distribution is found (no variation larger than 0.05 dex) over the whole ionized region. We concur with Tenorio-Tagle (1996) and Devost et al. (1997) that the observed abundance level cannot result from the material ejected by the stars formed in the current burst, and propose that the observed metals were formed in a previous star formation episode. Metals ejected in the current burst of star formation remain most probably hidden in a hot phase and are undetectable using optical spectroscopy. We discuss different scenarios of star formation in IZw 18. Combining various observational facts, for instance the faint star formation rate observed in low surface brightness galaxies (Van Zee et al. 1997c), it is proposed that a low and continuous rate of star formation occurring during quiescent phases between bursts could be a significant source of metal enrichment of the interstellar medium MH - Canada MH - France MH - Germany MH - Mexico|Puebla MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000086869100011 L2 - galaxies : dwarf;galaxies : individual : IZw 18;galaxies : ISM;H-II REGIONS; AMORPHOUS GALAXY NGC-5253; COMPACT DWARF GALAXIES; LY-ALPHA SYSTEMS; OPTICAL COUNTERPART; MASSIVE STARS; HII-REGIONS; INTERMEDIATE REDSHIFT; CHEMICAL ENRICHMENT; STELLAR POPULATIONS SO - Astronomy and Astrophysics 2000 ;355(3):891-899 1111 UI - 16377 AU - Legrand F AD - CNRS, Inst Astron, F-75014 Paris, FranceInst Nucl Astronfis Opt & Elect Tonantzintla, Puebla 72000, MexicoLegrand, F, CNRS, Inst Astron, 98 Bis Blvd Arago, F-75014 Paris, France TI - On the star formation history of IZw 18 AB - It has been suggested that a continuous low star formation rate has been the dominant regime in IZw 18 and in dwarf galaxies for the lifetime of these objects (Legrand et al. 1999). Here, we discuss and model Various star-forming histories far IZw 18. Particularly, we show that if the metallicity observed in IZw 18 results from starburst events only, the observed colors constrain the fraction of the metals ejected from the galaxy to be less than 50-70%. We demonstrate that the continuous star formation scenario reproduces the observed parameters of IZw 18. A continuous star formation rate (SFR) of about 10(-4) M(circle dot)yr(-1) during 14 Gyr reproduces precisely the observed abundances. This SFR is comparable with the lowest SFR observed in low surface brightness galaxies (Van Zee et al. 1997c). Generalized to all galaxies, the low continuous SFR scenario accounts for various facts: the presence of star formation in quiescent dwarfs and LSBG, the metallicity increase with time in the most under-abundant DLA systems, and the metal content extrapolations to the outskirts of spiral galaxies. Also the apparent absence of galaxies with a metallicity lower than IZw 18, the apparent absence of KI clouds without optical counterparts, and the homogeneity of abundances in dwarfs galaxies are natural outcomes of the scenario. This implies that, even if starbursts are strong and important events in the life of galaxies, their more subdued but continuous star formation regime cannot be ignored when accounting for their chemical evolution MH - France MH - Mexico|Puebla PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000085921500015 L2 - ISM : jets and outflows;galaxies : abundances;galaxies : individual : IZw 18;galaxies : ISM;DWARF GALAXIES; DISK GALAXIES; STELLAR POPULATIONS; ABSORPTION SYSTEMS; CHEMICAL EVOLUTION; OUTER REGIONS; MASS STARS; GAS; REDSHIFT; I-ZW-18 SO - Astronomy and Astrophysics 2000 ;354(2):504-512 1112 UI - 16172 AU - Lekht EE AU - Krasnov VV AD - Inst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, PN Lebedev Phys Inst, Astrosp Ctr, Pushchino Radio Astron Observ, Pushchino 142292, Moscow Oblast, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Tonantzintla 72840, Puebla, Mexico TI - Determining the period of the long-period activity of the water-vapor maser in W75N AB - We present the results of our study of the H2O maser emission from the source W75N, which is associated with a star-forming region, between November 1994 and March 1999. The observations were carried out with the RT-22 radio telescope of the Pushchino Radio Astronomy Observatory (Lebedev Physical Institute). The maser emission in 1994-1999 can be represented as a superposition of flares of separate components with a duration from two to six months, which occurred mainly in the radial-velocity range 8-17.5 km s(-1). We detected a regular drift of the velocity centroid from 13 to 9 km s(-1) and an abrupt change in its velocity from 9 to 5 km s(-1), which took place at the initial stage of maser activity. Based on the variability of the total H2O flux in all years of our observations of W75N (from December 1979 through March 1999), we conclude that the long-period variability of the water-vapor maser emission has a period of similar to 11.5 years. We give arguments that this variability is mainly associated with the most compact group of maser spots, whose positions coincide with the position of the continuum source VLA 2. (C) 2000 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000086600400005 L2 - H2O MASER; VARIABILITY SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2000 ;26(1):38-48 1113 UI - 16481 AU - Lekht EE AD - Inst Nacl Astrofis Opt & Electr, Puebla 72840, MexicoSternberg astron Inst, Moscow 119899, RussiaLekht, EE, Inst Nacl Astrofis Opt & Electr, Luis Enr Erro No 1, Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Investigation of the H2O maser emission in G43.8-0.1 AB - Observations and analysis of the H2O maser emission source, associated with the star-forming region G43.8 - 0.1, are presented. The observations were carried out oil the RT-22 radio telescope of the Pushchino Radio Astronomy Observatory (Russia) in 1994-1998. A new flare of emission of a group of features at radial velocities from 37.5 to 39.5 km s(-1), which took place in 1996-1998, was observed. For the 38.2 km s(-1) feature, a dependence between flux density and linewidth (ln F proportional to Delta V-2) was derived, it indicates that the maser is unsaturated or partly saturated. The evolution of emission of the 42.2 km s(-1) maser condensation is traced at a timespan of 16 years. The flux density was plotted versus linewidth for this feature (in the ln F, Delta V-2 coordinates). This dependence contains two branches, largely shifted with respect to each other. The transition from one branch to the other took 2.5 years, while the linewidth was fluctuating. Possible causes of existence of the two branches in the maser emission evolution are discussed. An analysis of the entire data set for 1976-1998 has shown that the time interval between the minima of integral flux in G43.8 - 0.1 was 18 +/- 1 yr. This figure can be taken as the period of the H2O maser activity in G43-8 - 0.1 MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000085527300002 L2 - masers;stars : formation;radio lines : stars;STAR-FORMATION; REGIONS SO - Astronomy & Astrophysics Supplement Series 2000 ;141(2):185-192 1114 UI - 11418 AU - Lemaitre C AU - El Fallah-Seghrouchni A AD - Lab Nacl Informat Avanzada, LANIA, Mexico City, DF, MexicoLab Informat Paris Nord, CNRS, UPRESA 7030, Paris, FranceLemaitre, C, Lab Nacl Informat Avanzada, LANIA, Mexico City, DF, Mexico TI - A multiagent systems theory of meaning based on the Habermas/Buhler communicative action theory AB - Based on J. Habermas/Buhler' Communicative Action theory we propose a novel framework that goes beyond the classical speech act theory and its intentionalistic interpretations. We introduce a comprehensive theory of meaning for communication acts assuming that the content of natural language utterances can be classified in three different domains of discourse, each one with a different type of semantic validation: the domain of objective facts, the internal or subjective domain of the sender, and the social relational domain of the sender and the receiver. Following Habermas, we introduce also a crucial shift in the agent interaction approach, focusing on the conversation control issues, on the receiver and not on the sender. We claim these two new approaches of mutiagent interactions will allow to control and manage the complex interactions among agents in open real world applications MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000174952800013 L2 - interaction theory;philosophy;communication languages;communicative agents;speech acts framework SO - Advances in Artificial Intelligence 2000 ;1952():116-125 1115 UI - 16137 AU - Lemos D AU - Ezquerra JM AU - Garcia-Carreno FL AD - Univ Sao Paulo, Inst Oceanog, BR-05389900 Sao Paulo, BrazilUniv Sonora, DIPA, Hermosillo 83000, Sonora, MexicoCtr Invest Biol Noroeste, La Paz 23000, BCS, MexicoLemos, D, Univ Sao Paulo, Inst Oceanog, POB 66149, BR-05389900 Sao Paulo, Brazil TI - Protein digestion in penaeid shrimp: digestive proteinases, proteinase inhibitors and feed digestibility AB - Protein is the most abundant ingredient in both natural and prepared diets of penaeid shrimp. The assessment of protein digestion through the developmental stages of penaeids may contribute to the development of more suitable feeding schedules for their cultivation. Among the techniques to study protein digestion, detection and characterization of digestive proteinase inhibitors in proteinaceous feed ingredients can be achieved by substrate-[sodium dodecyl sulphate polyacrylamide gel electrophoresis] (SDS-PAGE). In vitro assays of protein digestibility are also useful tools when testing alternative protein sources in the formulation of shrimp feeds. The present article reviews three methods that have been used to assess protein digestion: (1) detection and characterization of proteinase activity and proteinaceous proteinase inhibitors by substrate-SDS-PAGE, (2) quantification of proteinase activity, and (3) in vitro evaluation of digestibility of dietary protein sources by shrimp proteinases. A compilation of previously reported and unpublished data on some aspects of penaeid protein digestion is presented. Trypsin activity of Litopenaeus schmitti varied considerably during larval and postlarval development, showing the highest value at protozoea III. The molecular weight of digestive proteinases from early stages of Farfantepenaeus paulensis also differed from the adult pattern, and some activity bands could be characterized as trypsin in adult F, paulensis. The digestive proteinase pattern of adult Farfantepenaeus californiensis, F. paulensis, L. schmitti and Litopenaeus vannamei in SDS-PAGE showed clear differences among these species, which may be evidence of a species-specific pattern of protein digestion. In vitro evaluation of digestibility of aquafeeds can be achieved by the pH-stat method, which can help in the choice for alternative protein sources. Moreover, the quality of postharvest shrimp may also be affected by increased digestive proteinase activity that seems to be stimulated by low nutritional quality feeds. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Baja California Sur MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000086694500007 L2 - protein digestion;digestive enzymes;proteinases;digestibility;in vitro;shrimp;LANGOSTILLA PLEURONCODES-PLANIPES; IN-VITRO; ENZYME-ACTIVITY; COLLAGENOLYTIC ACTIVITIES; BIOCHEMICAL-COMPOSITION; VANNAMEI CRUSTACEA; GROWTH-RESPONSES; ONTOGENIC CHANGE; SERINE-PROTEASE; FRESH-WATER SO - Aquaculture 2000 ;186(1-2):89-105 1116 UI - 15831 AU - Lemus AE AU - Zaga V AU - Santillan R AU - Garcia GA AU - Grillasca I AU - mian-Matsumura P AU - Jackson KJ AU - Cooney AJ AU - Larrea F AU - Perez-Palacios G AD - Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Cell Biol, Houston, TX 77030, USASecretaria Salud, Direcc Gen Salud Reprod, Mexico City, DF, MexicoLemus, AE, Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - The oestrogenic effects of gestodene, a potent contraceptive progestin, are mediated by its A-ring reduced metabolites AB - Gestodene (17 alpha-ethynyl-13 beta-ethyl-17 beta-hydroxy-4,15-gonadien-3-one) is the most potent synthetic progestin currently available and it is widely used as a fertility regulating agent in a number of contraceptive formulations because of its high effectiveness, safety and acceptability. The observation that contraceptive synthetic progestins exert hormone-like effects other than their progestational activities, prompted us to investigate whether gestodene (GSD) administration may induce oestrogenic effects, even though the GSD molecule does not interact with intracellular oestrogen receptors (ER). To assess whether GSD may exert oestrogenic effects through some of its neutral metabolites, a series of experimental studies were undertaken using GSD and three of its A-ring reduced metabolites. Receptor binding studies by displacement analysis confirmed that indeed GSD does not bind to the ER, whereas its 3 beta,5 alpha-tetrahydro reduced derivative (3 beta GSD) interacts with a relative high affinity with the ER. The 3 alpha,5 alpha GSD isomer (3 alpha GSD) also binds to the ER, though to a lesser extent. The ability of the A-ring reduced GSD derivatives to induce oestrogenic actions was evaluated by the use of two different molecular bioassays: (a) transactivation of a yeast system cotransfected with the human ER alpha (hER alpha) gene and oestrogen responsive elements fused to the beta-galactosidase reporter vector and (b) transactivation of the hER alpha-mediated transcription of the chloramphenicol acetyl transferase (CAT) reporter gene in a HeLa cells expression system. The oestrogenic potency of 3 beta GSD was also assessed by its capability to induce oestrogen-dependent progestin receptors (PR) in the anterior pituitary of castrated female rats. The results demonstrated that 3 beta GSD and 3 alpha GSD were able to activate, in a dose-dependent manner, the hER alpha-mediated transcription of both the beta-galactosidase and the CAT reporter genes in the yeast and HeLa cells expression systems respectively. In both assays the 3 beta derivative of GSD exhibited a significantly greater oestrogenic effect than its 3 alpha isomer, while unchanged GSD and 5 alpha GSD were completely ineffective. Neither 3 beta GSD nor 3 alpha GSD exhibited oestrogen synergistic actions. Interestingly, the pure steroidal anti-oestrogen ICI-182,780 diminished the transactivation induced by 3 beta GSD and 3 alpha GSD in the yeast expression system. Furthermore, administration of 3 beta GSD resulted in a significant increase of oestrogen-dependent PR in the anterior pituitaries of castrated rats in comparison with vehicle-treated animals. The characteristics of the 3 beta GSD-induced PR were identical to those induced by oestradiol benzoate. The overall results demonstrate that 3 beta GSD and its 3 alpha isomeric alcohol specifically bind to the ER and possess a weak intrinsic oestrogenic activity, whereas unmodified GSD does not. The data contribute to a better understanding of the GSD mechanism of action and allow the hypothesis to be advanced that the slight oestrogen-like effects attributable to GSD are media non-phenolic, tetrahydro reduced metabolites MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: SOC ENDOCRINOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0022-0795 UR - ISI:000087699900018 L2 - RETINOIC ACID RECEPTORS; HUMAN ESTROGEN-RECEPTOR; VENOUS THROMBOEMBOLISM; ORAL-CONTRACEPTIVES; 19-NORTESTOSTERONE DERIVATIVES; THYROID-HORMONE; INCREASED RISK; CELL-GROWTH; NORETHISTERONE; BINDING SO - Journal of Endocrinology 2000 ;165(3):693-702 1117 UI - 16685 AU - Leon A AU - Glenn JS AU - Farver TB AD - Natl Autonomous Univ Mexico, Fac Vet Med, Mexico City 04510, DF, MexicoUniv Calif Davis, Sch Vet Med, Davis, CA 95616, USALeon, A, Sacramento 416 A,Col Del Valle, Mexico City 03100, DF, Mexico TI - Copper oxide wire particles for the treatment of copper deficiency in sheep AB - Copper plays an important role in physiological and biochemical systems of animals. Copper deficiency in sheep produces ataxia, changes in color of pigmented wool, anemia, diarrhea and weight loss and is a major concern in the sheep industry because of indirect economic losses. There are several treatments against this-disease but each of them has problems associated with usage. There is not an approved product for sheep in the United States for this deficiency. The efficacy of two copper oxide wire products (Coppinox(R) and Copasure(R)) were tested in a flock of sheep with known deficiency. Three groups of 10 animals each, were used in a randomized block design. Animals were blocked by age. One group was dosed with 4 g of Coppinox, one with 4 g of Copasure and the third was left as an untreated control. Serum samples were taken monthly and copper levels were measured. The initial mean and range for all the animals on the study was 0.667 PPM and 0.16-1.06 PPM. The treated groups presented an increase in the mean copper serum concentration above the normal level (0.8 PPM) for five months. The untreated group had a mean below 0.8 PPM during the trial and showed clinical manifestation of the disease. None of the treated animals had clinical signs of copper deficiency or copper intoxication. Both formulations were efficient and safe for treatment of copper deficiency in sheep. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000084386900002 L2 - copper;deficiency;sheep;copper oxide wire;CATTLE SO - Small Ruminant Research 2000 ;35(1):7-12 1118 UI - 16281 AU - Leon CMG AU - McIntosh WC AU - Lozano-Santacruz R AU - Valencia-Moreno M AU - maya-Martinez R AU - Rodriguez-Castaneda JL AD - Univ Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoNew Mexico Inst Min & Technol, New Mexico Geochronol Res Lab, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Sonora, Dept Geol, Hermosillo, Sonora, MexicoUniv Nacl Autonoma Mexico, Estac Reg Noroeste, Inst Geol, Hermosillo 83000, Sonora, MexicoLeon, CMG, Univ Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo 83000, Sonora, Mexico TI - Cretaceous and Tertiary sedimentary, magmatic, and tectonic evolution of north-central Sonora (Arizpe and Bacanuchi Quadrangles), northwest Mexico AB - The Arizpe and Bacanuchi Quadrangles provide a geologic history representative of the north-central part of Sonora, where lithologies are dominated by late Mesozoic and Cenozoic igneous rocks. In this study, new geologic mapping, Ar-40/Ar-39 dating, and geochemical analyses have been combined to provide a stratigraphic framework for this area. Ten lithostratigraphic units and several igneous and tectonic events can be recognized. The oldest outcropping rocks are Lower Cretaceous strata of the Bisbee Group, which along with the Picacho conglomerate record a middle Cretaceous compressive tectonic event and associated sedimentation. Laramide igneous activity is widespread and represented by (1) highly altered andesitic flows and volcaniclastic rocks (Arroyo Alcaparros andesitic rocks) of late Campanian to Maastrichtian age, (2) less altered andesitic and dacitic flows (Cerro Las Jarillas volcanic rocks) of late Paleocene age, and the intrusive bodies of (3) Sierra El Manzanal granodiorite and (4) Rancho Vaqueria quartz monzonite, The Sierra El Manzanal granodiorite was emplaced at ca, 68 Ma on the basis of a Ar-40/Ar-39 biotite age (67.97 +/- 0.19 Ma) and cooled relatively rapidly according to less precise Ar-40/Ar-39 hornblende and K-feldspar ages from the same sample (64.8 +/- 1.0 Ma and 62.8 +/- 0.3 Ma, respectively). The Cerro Las Jarillas volcanic rocks are slightly younger (Ar-40/Ar-39 biotite age of 58.67 +/- 0.17 Ma). The Rancho Vaqueria quartz monzonite was emplaced at ca. 57 Ma (Ar-40/Ar-39 biotite age of 56.73 +/- 0.14 Ma and a Less precise Ar-40/Ar-39 hornblende age of 55.0 1 +/- Ma); a protracted cooling history of this pluton is indicated by the age spectrum of K-feldspar from the same sample. A probable magmatic lull and denudation seem to have occurred between middle and late Eocene time and probably until the early Oligocene, Subsequently, rhyolitic to mafic volcanism began close to late Oligocene time and lasted until the early Miocene. Felsic volcanism is represented by the Cerro Cebadehuachi volcanic rocks, from which Ar-40/Ar-39 hornblende ages of 27.25 +/- 0.09 and 27.32 +/- 0.06 Ma and a biotite age of 26.97 +/- 0.06 Ma were obtained at three different localities. The Mesa Pedregosa volcanic rocks represent the transition to younger, mafic volcanic activity that occurred during the Late Oligocene, as indicated by a sanidine Ar-40/Ar-39 age of 25.48 +/- 0.05 Ma, This tate Oligocene and early Miocene magmatism was paired by two episodes of extensional deformation. The first phase is characterized by northwest-striking normal faults and folds, which expose the deepest structural levels of the area, and by the related basin fill, the Bacanuchi conglomerate. The second phase is represented by north-striking normal faults and hy the syntectonic basin fill, the Arizpe conglomerate. Basaltic andesite volcanic flows at the base of the Arizpe conglomerate yielded Ar-40/Ar-39 (whole-rock) ages of 23.52 +/- 0.17 and 21 +/- 0.20 Ma. The extensional deformation (27 to 23 Ma) in the study area is coeval with the development of metamorphic core complexes in neighboring areas of Sonora and with the onset of extension in southern Sonora, The mafic volcanic rocks and elastic sedimentary units associated with this extension resemble the basin fills that in other parts of Sonora are assigned to the Baucarit Formation. Geochemical information from samples representing each of the igneous events displayed high-K calc-alkalic and mostly metaluminous compositions, The older units including the Arroyo Alcaparros andesitic rocks, the Cerro I,as Jarillas volcanic rocks, the Sierra El Manzanal granodiorite, and the Rancho Vaqueria quartz monzonite are characterized by steep chondrite-normalized REE (rare earth element) slopes and generally well-developed negative Eu anomalies, suggesting garnet and plagioclase removal in the source. The younger igneous events including the Cerro Cebadehuachi and Mesa Pedregosa volcanic rocks, and the basaltic flows associated with the Arizpe conglomerate, showed basin-shaped REE slopes with no Eu anomalies, suggesting clinopyroxene or amphibole fractionation MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - COLLEGE STN: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000086230100008 L2 - Cretaceous;geochronology;magmatism;Sonora Mexico;tectonic evolution;Tertiary;DEPOSITS; EXTENSION; ROCKS; GEOCHRONOLOGY; PATTERNS; CANANEA; AMERICA SO - Geological Society of America Bulletin 2000 ;112(4):600-610 1119 UI - 14911 AU - Leon JA AU - Nualart D AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Math, Mexico City 07000, DF, MexicoUniv Barcelona, Dept Math, Barcelona 08007, SpainLeon, JA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Math, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Anticipating integral equations AB - In this paper we deduce some estimates of the L-p(Omega)-norm of the Skorohod and the forward integrals. These estimates allow us to study the existence of a unique solution to anticipating Volterra equations of the Skorohod and forward type. The coefficients F-i(t,s,x),t greater than or equal tos, are F-t-measurable and satisfy some differentiability conditions (in the sense of the stochastic calculus of variations) MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0926-2601 UR - ISI:000165088100003 L2 - anticipating stochastic calculus;Skorohod integral;stochastic Volterra equations;STOCHASTIC VOLTERRA-EQUATIONS SO - Potential Analysis 2000 ;13(3):249-268 1120 UI - 15005 AU - Leon JA AU - Sole JL AU - Vives J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Math, Mexico City 07000, DF, MexicoUniv Autonoma Barcelona, Dept Matemat, E-08193 Barcelona, SpainLeon, JA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Math, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Certain relations between pathwise integrals and the translator operator and its dual in canonical Poisson space AB - We study the relationship between the translation operator, its dual and the pathwise integral on the Poisson space with weak conditions on the processes MH - Mexico|Distrito Federal MH - Spain PB - BELLATERRA: UNIV AUTONOMA BARCELONA RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - French IS - 0214-1493 UR - ISI:000089937000014 SO - Publicacions Matematiques 2000 ;44(1):325-337 1121 UI - 15313 AU - Leon JA AU - Nualart D AU - Pettersson R AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoUniv Barcelona, Fac Matemat, E-08007 Barcelona, SpainUniv Lund, Ctr Math, SE-22100 Lund, SwedenLeon, JA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, A Postal 14-740, Mexico City 07000, DF, Mexico TI - The stochastic Burgers equation: Finite moments and smoothness of the density AB - We apply a stochastic version of the Hopf-Cole transformation to the solution of the stochastic Burgers equation with Dirichlet boundary conditions driven by a space time Gaussian white noise. As a consequence, we deduce that the solution of the Burgers equation has moments of all orders. Using the techniques of the Malliavin calculus we show that if the dispersion is state-independent, then the solution of the stochastic Burgers equation has a smooth density at any point (t, x), with t > 0 and x is an element of (0, 1) MH - Mexico|Distrito Federal MH - Spain MH - Sweden PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Physics, Mathematical;Statistics & Probability U5 - J;Article AV - English IS - 0219-0257 UR - ISI:000089185500003 L2 - PARTIAL-DIFFERENTIAL EQUATIONS SO - Infinite Dimensional Analysis Quantum Probability and Related Topics 2000 ;3(3):363-385 1122 UI - 16181 AU - Leon JA AU - Tudor C AD - Inst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoUniv Bucharest, Fac Math, Bucharest 70109, RomaniaCIMAT, Bucharest 70109, Romania TI - Chaos decomposition of stochastic bilinear equations with drift in the first Poisson-Ito chaos AB - In this paper we use the structure of the canonical Poisson space to calculate the explicit form of the chaos decomposition of the solution of a stochastic bilinear equation driven by a compensated Poisson process (defined on an arbitrary complete probability space) and with drift in the first Poisson-Ito chaos. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Romania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0167-7152 UR - ISI:000086405300002 L2 - canonical Poisson space;Poisson-Ito chaos decomposition;Poisson process;stochastic bilinear equations SO - Statistics & Probability Letters 2000 ;48(1):11-22 1123 UI - 14696 AU - Lepine S AU - Moffat AFJ AU - St-Louis N AU - Marchenko SV AU - Dalton MJ AU - Crowther PA AU - Smith LJ AU - Willis AJ AU - Antokhin II AU - Tovmassian GH AD - Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024, USAUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandMoscow State Univ, Strongbox State Astron Inst, Moscow 119899, RussiaInst Astron, Ensenada 22860, Baja California, MexicoLepine, S, Amer Museum Nat Hist, Dept Astrophys, Cent Pk W 79th St, New York, NY 10024 USA TI - Wind inhomogeneities in Wolf-Rayet stars. IV. Using clumps to probe the wind structure in the WC8 star HD 192103 AB - We present the most intensive, high-quality spectroscopic monitoring of optical Wolf-Rayet emission lines ever obtained. The Wolf-Rayet star HD 192103 (=WR 135; subtype WC8) was observed in the 5650-5840 Angstrom regime alternately from both the William Herschel Telescope and the Canada-France-Hawaii Telescope. The final data consist of a series of 197 spectra spread over 64 hr, each with a resolving power lambda/Delta lambda similar or equal to 20,000 and a signal-to-noise ratio in the continuum similar or equal to 450 per 3 pixel resolution element. We clearly and unambiguously identify stochastic, structured patterns of intrinsic variability at the 1%-2% level of the line flux in the broad C In lambda 5695 emission line. The lambda 5801/12 doublet emission is also found to be variable at the 0.2%-0.5% level of the line flux. We find a correlation between the variability patterns observed in C III and C rv, which suggests a significant overlap in the emission volumes of these transitions, although C Iv is known to arise somewhat closer to the star. We attempt to reproduce the observed line profile variation patterns using a simple phenomenological model, which assumes the wind to be fully clumped. With a minimal set of assumptions, we are able to reproduce both the shape and the variability in the C III lambda 5696 emission profile. We show that the variability pattern provides constraints on the radial extent of WR 135's wind where C III is produced, as well as on the local wind acceleration rate. However, our simple clump model does not reproduce the lower variability in the C rv doublet unless we assume the C Iv emission to occur in a much larger volume than C III, implying that: significant C Iv emission occurs farther out in the wind than C III. We suggest that while some C Iv emission might occur farther out, possibly because of reionization from shocks, a more likely explanation is that wind clumping significantly increases with distance from the star, leading to larger variability levels in C III, formed farther out than most of C rv. Alternatively, optical depth effects and/or local ionization gradients within clumps could conspire to attenuate clumping effects in the C rv emission line while enhancing them in the C III line MH - Canada MH - United Kingdom MH - Mexico|Baja California MH - USA MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000165870800031 L2 - stars : emission-line, Be;stars : individual (HD 192103);stars : Wolf-Rayet;LINE-PROFILE VARIATIONS; CONSTRAINTS; VARIABILITY; ULTRAVIOLET; SCATTERING; SPECTRUM; VELORUM; RATES; CYGNI; RADII SO - Astronomical Journal 2000 ;120(6):3201-3217 1124 UI - 15208 AU - Leskova TA AU - Leyva-Lucero M AU - Mendez ER AU - Maradudin AA AU - Novikov IV AD - Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USARussian Acad Sci, Inst Spect, Troitsk 142092, RussiaUniv Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Culiacan 80000, Sinaloa, MexicoCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada, Baja California, MexicoMaradudin, AA, Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA TI - The surface enhanced second harmonic generation of light from a randomly rough metal surface in the Kretschmann geometry AB - We present results of perturbative calculations of the second harmonic light generated in the transmission of p-polarized light through a thin metal film with a one-dimensional random surface in the Kretschmann attenuated total reflection (ATR) geometry. The metal film is deposited on the planar surface of a prism through which the light is incident. The back surface of the film is a one-dimensional random surface whose generators are perpendicular to the plane of incidence. It is in contact either with a semi-infinite vacuum or with a semi-infinite nonlinear crystal (quartz). It is shown that when the random surface separates the metal film from vacuum so that the nonlinearity of the film surfaces gives rise to the harmonic light, for a general angle of incidence a dip appears in the angular dependence of the intensity of the transmitted harmonic light in the direction normal to the mean surface. When the second harmonic generation is due to the nonlinearity of the crystal in contact with the metal film, a peak in the angular dependence of the intensity of the transmitted harmonic light occurs in this direction. These dips and peaks are multiple-scattering effects. However, when the angle of incidence is optimal for the excitation of surface plasmon polaritons at the film-vacuum/nonlinear crystal interface the nonlinear mixing of the incident light and the backward propagating surface plasmon polariton leads to an intense peak in the angular dependence of the intensity of the transmitted harmonic light in the direction normal to the mean surface. This peak is already present in the single-scattering approximation, (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Sinaloa MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000089384700023 L2 - OPTICAL 2ND-HARMONIC GENERATION; COHERENT BACKSCATTERING; SILVER FILMS; PLASMONS; LOCALIZATION; SCATTERING SO - Optics Communications 2000 ;183(5-6):529-545 1125 UI - 15344 AU - Lewis KC AU - Maxwell AR AU - McLean S AU - Reynolds WF AU - Enriquez RG AD - Univ W Indies, Dept Chem, St Augustine, Trinid & TobagoUniv Toronto, Dept Chem, Toronto, ON M5S 1A1, CanadaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMaxwell, AR, Univ W Indies, Dept Chem, St Augustine, Trinid & Tobago TI - Room-temperature (H-1, C-13) variable-temperature (H-1) NMR studies on spinosin AB - Spinosin, a C-glycoside flavonoid, was isolated from the plant Desmodium tortuosum (Sw.) DC. The H-1 and C-13 NMR data acquired at room temperature exhibited doubling of signals, suggesting the presence of two rotamers in solution. Variable-temperature H-1 NMR experiments confirmed this hypothesis. T-ROESY experiments in conjunction with theoretical (MM2) calculations supported the proposal that the two rotamers interchange via rotation about the C-6-C-1 " bond. The spectral data were completely assigned using H-1-.H-1 COSY, HMQC, HSQC and HMBC experiments. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Canada MH - Mexico|Distrito Federal MH - Trinid & Tobago PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000089027900009 L2 - NMR;H-1 NMR;C-13 NMR;variable temperature;Desmodium tortuosum;C-glycoside flavonoid;spinosin;SPECTROSCOPY; SENSITIVITY SO - Magnetic Resonance in Chemistry 2000 ;38(9):771-774 1126 UI - 16330 AU - Leyva-Ramos J AU - Morales-Saldana JA AD - Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005, USAUniv Autonoma San Luis Potosi, Fac Ingn, San Luis Potosi 78290, MexicoLeyva-Ramos, J, Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA TI - Uncertainty models for switch-mode DC-DC converters AB - Uncertainty models for the three basic switch-mode converters, buck, boost, and buck-boost, are given in this paper. The resulting models are represented by linear fractional transformations (LFT's) with structured dynamic uncertainties. Uncertainties are assumed for the load resistance R = R-o(1 + delta(R)), inductance L = L-o(1 + delta(L).), and capacitance C = C-o(1 + delta(C)). The interest in these models is clearly motivated by the need to have models for switch mode de-de converters that are compatible with robust control design, which require a model structure consisting of a nominal model, and a norm-bounded modeling uncertainty. Therefore, a robust controller design under parameter uncertainties can be obtained instead of the deterministic approach widely used MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1057-7122 UR - ISI:000085979000009 L2 - DC-DC power conversion;robust analysis;uncertainty models SO - Ieee Transactions on Circuits and Systems I-Fundamental Theory and Applications 2000 ;47(2):200-203 1127 UI - 16100 AU - Leyvraz F AU - Mendez-Sanchez RA AU - Lombardi M AU - Seligman TH AD - CNRS, Spectrometrie Phys Lab, F-38402 St Martin Dheres, FranceUniv Grenoble 1, UMR 5588, F-38402 St Martin Dheres, FranceUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoLombardi, M, CNRS, Spectrometrie Phys Lab, BP87, F-38402 St Martin Dheres, France TI - Multichannel quantum defect theory: a quantum Poincare map AB - The multichannel quantum defect theory (MQDT) can be reinterpreted as a quantum Poincare map in representation of angular momentum. This has two important implications: we have a paradigm of a true quantum Poincare map without semi-classical input and we get an entirely new insight into the significance of MQDT. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000086635600017 L2 - SEMICLASSICAL QUANTIZATION; TRANSFER OPERATOR; SYSTEMS; UNIVERSAL; BILLIARDS; SURFACE; SECTION SO - Physics Letters A 2000 ;268(4-6):309-314 1128 UI - 16139 AU - Leznov AN AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Cuernavaca 62191, Morelos, MexicoInst High Energy Phys, Protvino, Moscow Oblast, RussiaLeznov, AN, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Cuernavaca 62191, Morelos, Mexico TI - Graded Lie algebras, representation theory, integrable mappings, and integrable systems AB - A new lass of integrable mappings and chains is introduced. The corresponding 1+2 integrable that are invariant under such integrable mappings are presented in an explicit form. Soliton-type solutions of these systems are constructed in terms of matrix elements of fundamental representations of semisimple A(n) algebras for a given group element. The possibility of generalizing this construction to the multidimensional case is discussed MH - Mexico|Morelos MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0040-5779 UR - ISI:000086555000009 L2 - TODA; DETERMINANTS; EQUATIONS SO - Theoretical and Mathematical Physics 2000 ;122(2):211-228 1129 UI - 16002 AU - Li C AU - Bando Y AU - Nakamura M AU - Kimizuka N AD - Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 305, JapanUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoLi, C, Natl Inst Res Inorgan Mat, 1 Namiki, Tsukuba, Ibaraki 305, Japan TI - Relation between In ion ordering and crystal structure variation in homologous compounds InMO3(ZnO)(m) (M = Al and In; m = integer) AB - The relation between the ordering of In ions and the structure variation of homologous compounds InInO3(ZnO)(13) and InAlO3(ZnO), (m = 4, 5, and 13) have been studied by high-resolution transmission electron microscopy. It is revealed that InMO3(ZnO), is a layered structure, consisting of InO21- (In-O) and MZn(m)Of(m+1)(1+) (M/Zn-O) layers stacked alternatively. Structure variations from the basic one, caused by the ordering of In ions in the M/Zn-O layers, are observed both in In2O3(ZnO), and InAlO3(ZnO)(m). In In2O3(ZnO)(m), a modulated structure appearing as zig-zag shaped contrast in the high-resolution image was found and is considered to be caused by the ordering of In ions along the zig-zag contrast area. In InAlO3(ZnO)(m), no modulated structure was found. Instead, planar defect structures appearing in Al/Zn-O layers were observed. It is shown that this defect structure is caused by the excess introduction of In ions into the Al/Zn-O layers and the ordering of these In ions. By comparing the results of InInO3(ZnO)(m) and InAlO3(ZnO)(m), it is shown that the reasons for the In ion ordering is the discrepancy between the larger In ion size and the smaller oxygen void for M/Zn ions in M/Zn-O layers. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Microscopy U5 - J;Article AV - English IS - 0968-4328 UR - ISI:000087050100013 L2 - ion ordering;crystal structure variation;homologous compounds;RESOLUTION ELECTRON-MICROSCOPY; PHASE-RELATIONS; SYSTEM; 1350-DEGREES-C SO - Micron 2000 ;31(5):543-550 1130 UI - 15672 AU - Li CF AU - Bando Y AU - Nakamura M AU - Kimizuka N AU - Kito H AD - Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 305, JapanUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoElectrotech Lab, Tsukuba, Ibaraki 305, JapanLi, CF, Japan Sci & Technol Corp, Inoue Superliquid Glass Project, Taihaku Ku, Yagiyamaminami 2-1-1, Sendai, Miyagi 9820807, Japan TI - Precipitate within the spinel-type Zn2TiO4 matrix studied by high-resolution analytical transmission electron microscopy AB - Zn2TiO4 and TiO2 in the ZnO-TiO2 system have been reported to coexist in the composition region of 33 to 100 mol% TiO2 at temperatures between 1218 and 1691 K. In the present study, compounds prepared by annealing raw materials of ZnO and TiO2 in a molar ratio of 3:2 at 1623 K were studied by high-resolution analytical transmission electron microscopy (TEM). An unexpected precipitate within the spinel-type Zn2TiO4 matrix was found. Viewed along the [001] orientation of Zn2TiO4, the precipitate was found to have a rectangular shape and to be about 40 nm in size, The chemical formula of the precipitate is estimated to be ZnTiO3. Diffraction patterns from the precipitate can be indexed by considering a cubic unit cell with the same lattice constants as that of Zn2TiO4. The orientation of the precipitate with respect to the matrix is [010](100)(pre)//[010](100)(mat), where the subscripts pre and mat represent the precipitate and matrix, respectively. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000088058000005 L2 - inorganic compounds;chemical synthesis;electron diffraction;electron microscopy;microstructure;TI SO - Materials Research Bulletin 2000 ;35(3):351-358 1131 UI - 16023 AU - Li CL AU - Novaro O AU - Munoz E AU - Boldu JL AU - Bokimi X AU - Wang JA AU - Lopez T AU - Gomez R AD - Univ Nacl Autonoma Mexico, Inst Phys, Mexico City 01000, DF, MexicoE China Univ Sci & Technol, Petr Proc Res Ctr, Shanghai 200237, Peoples R ChinaInst Politecn Nacl, Super Sch Chem Engn, Lab Catalysis & Mat, ESIQIE,UPALM, Mexico City 07738, DF, MexicoUniv Autonoma Metropolitana IAP, Dept Chem, Mexico City 09340, DF, MexicoNovaro, O, Univ Nacl Autonoma Mexico, Inst Phys, AP 20-364, Mexico City 01000, DF, Mexico TI - Coke deactivation of Pd/H-mordenite catalysts used for C-5/C-6 hydroisomerization AB - Coke formation in C-5/C-6 alkane isomerization on a Pd/H-Mordenite catalyst discharged from a pilot reactor was studied. Experimental techniques like XRD, EPR, MAS-NMR, FTIR, TGA and TPO, were applied for the characterization of coke and coked catalysts. It was shown that coke content, chemical composition, its structure and nature depended upon time-on-stream and section of the catalyst bed. The coke content increased from 3.0 in the top section, to 4.1 wt.% in the central section and 6.2 wt.% in the bottom of the catalyst bed and C/H ratio of the corresponding coke increased from 1:1.12, 1:0.55 to 1:0.35, which significantly affected the catalytic behavior and regeneration of the catalysts. The selectivity to 2,2-dimethyl butane during n-hexane isomerization, respectively, decreased from 19% for the fresh catalysts, to 10% and 8.3% for the coked catalysts in the central and outlet sections. As time-on-stream increased, coke initially formed on palladium metals and then moved to acidic sites in the support where polyaromatic or pseudographite-like structures were formed through further acid catalyzed reactions. Two kinds of coke with different nature could be combusted below 300 and 600 degrees C, respectively. These results are very useful for choosing operation parameters to restore initial activity of the coked catalysts in the regeneration units in our pilot plant. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000087088500004 L2 - coke composition;hydroisomerization;Pd/H-mordenite;catalyst;deactivation by coke;pilot plant SO - Applied Catalysis A-General 2000 ;199(2):211-220 1132 UI - 16071 AU - Lightowlers MW AU - Flisser A AU - Gauci CG AU - Heath DD AU - Jensen O AU - Rolfe R AD - Univ Melbourne, Werribee, Vic 3030, AustraliaInst Nacl Diagnost & Referencia Epidemiol, Mexico City 11340, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoAgResearch, Wallaceville Anim Res Ctr, Upper Hutt, New ZealandPrograma Control Hydatidosis, RA-9020 Sarmiento, Chubut, ArgentinaLightowlers, MW, Univ Melbourne, 250 Princes Highway, Werribee, Vic 3030, Australia TI - Vaccination against cysticercosis and hydatid disease AB - Infections with the larval stages of taeniid cestode parasites cause substantial human morbidity as well as economic losses in domestic livestock species. Despite ongoing efforts around the world, few countries have been able substantially to reduce or eradicate these infections through the use of anthelmintics and lifestyle changes. Vaccines offer an additional potential tool to assist with the control of parasite transmission. Here, Marshall Lightowlers and colleagues review the substantial progress that has been made towards developing practical vaccines against hydatid disease in sheep and cysticercosis in sheep and cattle. Recombinant antigens have been used to induce more than 90% protection against challenge infections. Such success in animals encourages investigation of the potential use of vaccines in humans to prevent hydatid disease arising from infection with Echinococcus granulosus and cysticercosis from infection with Taerua solium MH - Argentina MH - Australia MH - Mexico|Distrito Federal MH - New Zealand PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 47 U4 - Parasitology U5 - J;Review AV - English IS - 0169-4758 UR - ISI:000086807600008 L2 - TAENIA-SOLIUM CYSTICERCOSIS; RECOMBINANT ONCOSPHERE ANTIGENS; CDNA CLONING; OVIS VACCINE; III MODULES; FIELD TRIAL; PIGS; IMMUNIZATION; MEXICO; IDENTIFICATION SO - Parasitology Today 2000 ;16(5):191-196 1133 UI - 16185 AU - Lim D AU - Downer MC AU - Ekerdt JG AU - Arzate N AU - Mendoza BS AU - Gavrilenko VI AU - Wu RQ AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAAC Leon, Ctr Invest Opt, Guanajuato, MexicoCalif State Univ Northridge, Dept Phys & Astron, Northridge, CA 91330, USADowner, MC, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - Optical second harmonic spectroscopy of boron-reconstructed Si(001) AB - Optical second harmonic generation (SHG) spectroscopy is used to probe Si(001) following thermal decomposition of diborane at the surface. Incorporation of boron (B) at second layer substitutional sires at H-free Si(001) intensifies and redshifts the E-1 SHG spectral peak, while subsequent H termination further intensifies and blueshifts E-1, in sharp contrast to the effect of hulk B doping or nonsubstitutional B. Ab initio pseudopotential and semiempirical tight binding calculations independently reproduce these unique trends, and attribute them to the: surface electric field associated with charge transfer to electrically active B accepters, and rehybridization of atomic bonds MH - Mexico|Guanajuato MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000086404500048 L2 - SCANNING-TUNNELING-MICROSCOPY; MOLECULAR-BEAM EPITAXY; SI(111)ROOT-3X-ROOT-3-B SURFACE; 2ND-HARMONIC SPECTROSCOPY; HYDROGEN; SI(111); SILICON; PSEUDOPOTENTIALS; PHOTOEMISSION; DESORPTION SO - Physical Review Letters 2000 ;84(15):3406-3409 1134 UI - 15245 AU - Limon-Ortega A AU - Sayre KD AU - Francis CA AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Nebraska, Lincoln, NE 68583, USASayre, KD, CIMMYT, AP 6-641, Mexico City 06600, DF, Mexico TI - Wheat and maize yields in response to straw management and nitrogen under a bed planting system AB - In the Yaqui Valley, northwest Mexico, the crop sequence that is becoming more common consists of planting wheat (Triticum aestivum L.) as a winter crop on a raised bed followed by maize (Zea mays L.) as a summer crop. In this area, straw of both winter and summer crops is commonly burned. The consequences of burning crop residues on crop yields in the Yaqui Valley have not previously been documented, and alternative practices have not been proposed.. A 5-yr study was conducted at the CIANO (Centro de Investigaciones Agricolas del Noroeste) experiment station in Sonora, Mexico, to compare the effects of burning with other straw management strategies on wheat and maize yields. We tested two tillage systems (conventional-tilled bed, CTB, and permanent bed, PB), five straw management treatments (incorporated with CTB and straw as stubble, partly removed, removed, or burned with PB), and seven N treatments, five applied preplant (0, 75, 150, 225, and 300 kg N ha(-1)) and two at the Ist node stage (150 and 300 kg N ha(-1)) of wheat. Maize following wheat received a uniform application of 150 kg N ha(-1). The combination of PB and straw as stubble produced superior maize and wheat grain yields in high-yielding environments; in low-yielding environments, PB-straw burned produced greater wheat grain yields. Nitrogen fertilizer application of 150 and 300 kg N ha(-1) at the Ist node stage of wheat increased grain yields compared with preplant N fertilizer applications. Permanent beds combined with retaining all crop residues in the soil as stubble have the potential to increase both wheat and maize yields in the Yaqui Valley MH - Mexico|Distrito Federal MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000089407900017 L2 - SOIL PROPERTIES; STABILITY ANALYSIS; CROP RESIDUES; SPRING WHEAT; TILLAGE SO - Agronomy Journal 2000 ;92(2):295-302 1135 UI - 15246 AU - Limon-Ortega A AU - Sayre KD AU - Francis CA AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Nebraska, Lincoln, NE 68583, USASayre, KD, CIMMYT, AP 6-641, Mexico City 06600, DF, Mexico TI - Wheat nitrogen use efficiency in a bed planting system in northwest Mexico AB - Wheat (Triticum aestivum L.) in the Yaqui Valley, northwest Mexico, is planted as a winter crop using a raised-bed, furrow-irrigated system and high fertilizer N rates, Wheat residues are usually burned before planting maize (Zea mays L,) as a summer crop. The N use of wheat planted following conventional tillage using a raised-bed system (CTB) incorporating both wheat and maize residues was compared with wheat planted using permanent raised beds (PB) under four residue management treatments: all straw (wheat and maize) left as stubble, straw partly removed (maize residues removed; wheat residues retained), all straw removed, and all straw burned. Each wheat plot was split into seven N fertilizer (N-f) treatments: five applied at planting (0, 75, 150, 225, and 300 kg ha(-1)) and two at the Ist node stage (150 and 300 kg ha(-1)). Maize received a uniform N-f application of 150 kg ha(-1). The N use efficiency of wheat with 150 kg N-f ha(-1) at the Ist node stage was superior to basal applications at the same rate. Permanent bed-all straw left as stubble and PB-all straw burned had the highest average wheat grain yields (5.57 and 5.52 Mg. ha(-1), respectively), N use efficiency (28.2 and 29.1 kg grain kg(-1) of N supply, respectively), and total N uptake (133 and 137 kg ha(-1), respectively), Total N uptake for 150 and 300 kg N-f ha(-1) at the 1st node stage was 14 and 8% greater, respectively than at planting. In most tillage-straw treatments, 21% of the difference in wheat grain yields was due to the N supply component at low N rates; at high N rates, 97% was due to N use efficiency MH - Mexico|Distrito Federal MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 7 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000089407900018 SO - Agronomy Journal 2000 ;92(2):303-308 1136 UI - 16213 AU - Lin D AU - Smith IA AU - Liang EP AU - Bridgman T AU - Smith DM AU - Marti J AU - Durouchoux P AU - Mirabel IF AU - Rodriguez LF AD - Rice Univ, Dept Space Phys & Astron, Houston, TX 77005, USANASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Calif Berkeley, Space Sci Lab, Berkeley, CA 94720, USAUniv Jaen, Dept Fis, Escuela Politecn Super, E-23071 Jaen, SpainCEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaUNAM, Inst Astron, Morelia 58090, Michoacan, MexicoLin, D, Rice Univ, Dept Space Phys & Astron, 6100 S Main, Houston, TX 77005 USA TI - Simultaneous observations of GRS 1758-258 in 1997 by VLA, IRAM, SEST, RXTE, and OSSE: Spectroscopy and timing AB - We report the results of our multiwavelength observations of GRS 1758-258 made in 1997 August. The energy bands include radio, millimeter, X-ray, and gamma-ray. The observations enable us to obtain a complete spectrum of the source over an energy range of 2-500 keV. The spectrum shows that GRS 1758-258 was in its hard state. It is well fit by the Sunyaev-Titarchuk (ST) Compton scattering model with a plasma temperature of 45 keV and a Thomson depth of 3.3. Taking relativistic effects into account, we get a little higher plasma temperature (52 keV) by using the improved version of the ST model (HT model) plus a soft blackbody component. The spectrum is also fit by a power law with an exponential cutoff (PLE) plus a soft blackbody component. The temperature of the soft components in both models is about 1.2 keV, and the energy flux is less than 1.5% of the total X-ray and gamma-ray flux. The deduced hydrogen column density is in the range of (0.93-2.0) x 10(22) cm(-2) NO significant iron lines are detected. The radio emission has a flat energy spectrum. The daily radio, X-ray, and gamma-ray light curves show that GRS 1758-258 was stable during the observation period but was highly variable on smaller timescales in X-rays and gamma rays. The power density spectra are typical for the low state, but we find the photon flux for the 5-10 keV band to be more variable than that in the other two energy bands (2-5 keV and 10-40 keV). Harmonically spaced quasi-periodic oscillations are observed in the power spectra. The phase lags between the hard photons and the soft photons have a hat distribution over a wide range of frequencies. A high coherence of about 1.0 (0.01-1 Hz) between the hard photons and the soft photons is also obtained in our observations. We compare these results with two variation models. Our millimeter observations did not reveal any conclusive signatures of an interaction between the jet from GRS 1758-258 and the molecular cloud that lies in the direction of GRS 1758-258 MH - USA MH - Argentina MH - France MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086330400049 L2 - accretion, accretion disks;black hole physics;gamma rays : observations;radio continuum : stars;stars : individual (GRS 1758-258);X-rays : stars;X-RAY SOURCE; MOLECULAR CLOUD; GALACTIC-CENTER; COMPTONIZATION MODELS; SOURCE GRS-1758-258; TIME VARIATIONS; BLACK-HOLE; 1E-1740.7-2942; 1E1740.7-2942; COUNTERPART SO - Astrophysical Journal 2000 ;532(1):548-562 1137 UI - 15502 AU - Lind OT AU - valos-Lind L AU - Ford TE AD - Baylor Univ, Dept Biol, Limnol Lab, Waco, TX 76798, USABaylor Univ, Chapala Ecol Stn, Waco, TX 76798, USAUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USALind, OT, Baylor Univ, Dept Biol, Limnol Lab, Waco, TX 76798, USA TI - Clay and the movement of metals into food fishes AB - Tilapia and charal are important in the fishery of Lake Chapala, Mexico and are known to carry large body burdens of heavy metals. Copper and zinc concentrations in tilapia tissues were greatly reduced when the fish were exposed for one month to the metals in mesocosms containing suspended clay as compared with clay-free mesocosms. For charal, there was no apparent effect of clay on tissue accumulation of metal. Suspended clay is a feature of lakes and reservoirs-particularly in arid and semi-arid regions and in estuaries. Anthropogenic increases in clay suspensoids from dredging, land clearing, road construction and resuspension with declining water depths is occurring. These data suggest that such suspensoids, while having other ecosystem effects, provide a level of protection to biota from xenobiotic materials MH - Mexico|Jalisco MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1093-4529 UR - ISI:000088602300012 L2 - fish;heavy metals;day;tissue accumulation;HEAVY-METALS; TURBIDITY SO - Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering 2000 ;35(7):1171-1182 1138 UI - 16480 AU - Linder SM AD - Penn State Univ, University Pk, PA 16802, USALinder, SM, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Galaxy selection and clustering and Ly alpha absorber identification AB - The effects of galaxy selection on our ability to constrain the nature of weak Ly alpha absorbers at low redshift are explored. Current observations indicate the existence of a substantial population of gas-rich, low surface brightness (LSB) galaxies, and these galaxies may have large cross sections for Ly alpha absorption. Absorption arising in LSB galaxies is likely to be attributed to high surface brightness galaxies at larger impact parameters from quasar lines of sight, so that the observed absorption cross sections of galaxies may seem unreasonably large. Thus it is not currently possible to rule out scenarios in which LSB galaxies make substantial contributions to Ly alpha absorption using direct observations. Less direct tests, where observational selection effects are taken into account using simulations, should make it possible to determine the nature of Ly alpha absorbers by observing a sample of similar to 100 galaxies around quasar lines of sight with well-defined selection criteria. Such tests, which involve comparing simulated and observed plots of the unidentified absorber fractions and absorbing galaxy fractions versus impact parameter, can distinguish between scenarios where absorbers arise in particular galaxies and those where absorbers arise in gas that traces the large-scale galaxy distribution. Care must be taken to minimize observational selection effects even when using these tests. Results from such tests are likely to be dependent upon the limiting absorption-line equivalent width or neutral hydrogen column density. While not enough data are currently available to make a strong conclusion about the nature of moderately weak absorbers, some evidence is seen that such absorbers arise in gas that is around or between galaxies that are often not detected in surveys MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000085524800003 L2 - galaxies : fundamental parameters;intergalactic medium;large-scale structure of universe;quasars : absorption lines;SURFACE-BRIGHTNESS GALAXIES; LINE KEY PROJECT; ABSORPTION SYSTEMS; LOW-REDSHIFT; GASEOUS EXTENT; ENVIRONMENT; CLOUDS; FOREST; Z-LESS-THAN-1; ORIGIN SO - Astrophysical Journal 2000 ;529(2):644-654 1139 UI - 14961 AU - Link JM AU - Paolone VS AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Simao FRA AU - Carrillo S AU - Casimiro E AU - Mendez H AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - Ramirez JE AU - O'Reilly B AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Gourlay SA AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Myung SS AU - Park H AU - Alimonti G AU - Boschini M AU - Brambilla D AU - Caccianiga B AU - Calandrino A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Prelz F AU - Rovere M AU - Sala A AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo M AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Torre P AU - Viola L AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Quinones J AU - Rivera C AU - Zhang Y AU - Copty N AU - Purohit M AU - Wilson JR AU - Cho K AU - Handler T AU - Engh D AU - Johns WE AU - Hosack M AU - Nehring MS AU - Sales M AU - Sheldon PD AU - Stenson K AU - Webster MS AU - Sheaff M AU - Kwon Y AD - Ist Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Nucl & Teor, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAYonsei Univ, Seoul 120749, South KoreaPedrini, D, Ist Nazl Fis Nucl, Via Celoria 16, I-20133 Milan, Italy TI - Search for violation in D-0 and D+ decays AB - A high statistics sample of photoproduced charm particles from the FOCUS (E831) experiment at Fermilab has been used to search for CP violation in the Cabibbo suppressed decay modes D+ --> K(-)K(+)pi (+), D-0 --> K-K+ and D-0 --> pi (-)pi (+) We have measured the following CP asymmetry parameters: A(CP)(K(-)K(+)pi (+)) = +0.006 +/- 0.011 +/- 0.005, A(CP)(K-Kf) = -0.001 +/- 0.022 +/- 0.015 and A(CP)(pi (-)pi (+)) = +0.048 +/- 0.039 +/- 0.025 where the first error is statistical and the second error is systematic. These asymmetries are consistent with zero with smaller errors than previous measurements. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000165057600003 L2 - CP VIOLATION; MESON DECAYS SO - Physics Letters B 2000 ;491(3-4):232-239 1140 UI - 15203 AU - Link JM AU - Paolone VS AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Simao FRA AU - Carrillo S AU - Casimiro E AU - Mendez H AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - Ramirez JE AU - O'Reilly B AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Gourlay SA AU - Kasper PH AU - Kreymer AE AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kutschke R AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Myung SS AU - Park H AU - Alimonti G AU - Boschini M AU - Brambilla D AU - Caccianiga B AU - Calandrino A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Prelz F AU - Rovere M AU - Sala A AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo M AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Torre P AU - Viola L AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Quinones J AU - Rivera C AU - Zhang Y AU - Copty N AU - Purohit M AU - Wilson JR AU - Cho K AU - Handler T AU - Engh D AU - Johns WE AU - Hosack M AU - Nehring MS AU - Sales M AU - Sheldon PD AU - Stenson K AU - Webster MS AU - Sheaff M AU - Kwon YJ AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Nucl & Teor, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurements of the Sigma(0)(c) and Sigma(++)(c) mass splittings AB - Using a high statistics sample of photoproduced charmed particles from the FOCUS experiment at Fermilab (FNAL-E831), we measure the mass splittings of the charmed baryons Sigma(c)(0) and Sigma(c)(++). We find M(Sigma(c)(0) - Lambda(c)) = 167.38 +/- 0.21 +/- 0.13 MeV/c(2) and M(Sigma(c)(++) - Lambda(c)(+)) = 167.35 +/- 0.19 +/- 0.12 MeV/c(2) with samples of 362 +/- 36 and 461 +/- 39 events, respectively. We measure the isospin mass splitting M(Sigma(c)(++) - Sigma(c)(0)) to be -0.03 +/- 0.28 +/- 0.11 MeV/c(2). The first errors are statistical and the second are systematic. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000089394600002 L2 - SIGMA-C++; BARYONS SO - Physics Letters B 2000 ;488(3-4):218-224 1141 UI - 15618 AU - Link JM AU - Paolone VS AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Simao FRA AU - Vale MA AU - Carrillo S AU - Casimiro E AU - Mendez H AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - Ramirez JE AU - O'Reilly B AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Gourlay SA AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Myung SS AU - Park H AU - Alimonti G AU - Boschini M AU - Brambilla D AU - Caccianiga B AU - Calandrino A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Prelz F AU - Revere M AU - Sala A AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo M AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Torre P AU - Viola L AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Quinones J AU - Rivera C AU - Zhang Y AU - Copty N AU - Purohit M AU - Wilson JR AU - Cho K AU - Handler T AU - Engh D AU - Johns WE AU - Hosack M AU - Nehring MS AU - Sales M AU - Sheldon PD AU - Stenson K AU - Webster MS AU - Sheaff M AU - Kwon YJ AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoFermi Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAYonsei Univ, Seoul 120749, South KoreaUniv Colorado, Boulder, CO 80309, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - A measurement of lifetime differences in the neutral D-meson system AB - Using a high statistics sample of photoproduced charm particles from the FOCUS experiment at Fermilab, we compare the lifetimes of neutral D mesons decaying via D-0 --> K- pi(+) and K-K+ to measure the lifetime differences between CP even and CP odd final states. These measurements bear on the phenomenology of D-0 - (D) over bar(0) mixing. If the D-0 --> K- pi(+) is an equal mixture of CP even and CP odd eigenstates, we measure y(CP) = (Gamma(CP even) - Gamma(CP odd))/(Gamma(CP even) + Gamma(CP odd)) = 0.0342 +/- 0.0139 +/- 0.0074. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 62 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000088239800009 SO - Physics Letters B 2000 ;485(1-3):62-70 1142 UI - 15110 AU - Linke-Gamenick I AU - Forbes VE AU - Mendez N AD - Roskilde Univ Ctr, Dept Chem & Life Sci, DK-4000 Roskilde, DenmarkUNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Lab Invertebrados Benton, Mazatlan 82000, Sinaloa, MexicoLinke-Gamenick, I, Roskilde Univ Ctr, Dept Chem & Life Sci, POB 260, DK-4000 Roskilde, Denmark TI - Effects of chronic fluoranthene exposure on sibling species of Capitella with different development modes AB - Toxic effects of the polycyclic aromatic hydrocarbon fluoranthene (FLU) on life-history traits and their demographic consequences were investigated in 3 non-interbreeding Capitella sibling species with different physiological tolerances and developmental modes: sensitive Capitella sp. S from oxygen-rich intertidal sediments of the North Sea (Germany); tolerant Capitella sp. M from sediments near shallow hydrothermal vents off Miles (Greece), a habitat low in organic matter with steep abiotic gradients and high sulfide concentrations; tolerant Capitella sp. I from New York (USA), known to dominate eutrophicated/polluted environments. Both Capitella spp. M and I can develop into hermaphrodites and have lecithotrophic larval development. In contrast, Capitella sp. S appears to be dioecious and has direct development with benthic juveniles. In life-table-response experiments (LTRE), juveniles from the 3 species were raised under different FLU concentrations (0 to 95 mu g g(-1) FLU), and data on age-specific survival, growth and life-history parameters were recorded at weekly intervals. Under control conditions, the 3 Capitella species differed markedly in a number of life-history traits and population growth rates (lambda), with Capitella sp. S showing the lowest lambda (1.05), and Capitella sp. M the highest (1.42). Chronic exposure to inreasing FLU concentrations also revealed species-specific differences in individual- and population-level toxic responses. Highest FLU concentrations (95 pg g(-1)) markedly reduced juvenile survival and completely inhibited reproduction in Capitella sp. S, whereas individual life-history traits in Capitella spp. M and I were affected Little, if at all. At the population level, the highest FLU exposures resulted in ii. values of effectively zero in Capitella sp. S, whereas lambda of Capitella spp. M and I remained >1. In conclusion, the combination of opportunistic life-history features, reproductive flexibility, and physiological adaptations enables Capitella spp. M and I to colonize habitats rapidly after local disturbance and to persist in stressed and unpredictable environments; whereas in Capitella sp. S, population extinction under toxicant stress mainly results from its physiological sensitivity MH - Denmark MH - Mexico|Sinaloa PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 25 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000089661100015 L2 - Capitella sibling species complex;fluoranthene;life-history traits;benthic and lecithotrophic development population growth rate;TABLE RESPONSE EXPERIMENTS; LIFE-HISTORY TRAITS; SP-I; POPULATION-DYNAMICS; AEGEAN SEA; POLYCHAETE; SEDIMENT; CAPITATA; DENSITY; GROWTH SO - Marine Ecology-Progress Series 2000 ;203():191-203 1143 UI - 16340 AU - Lipovka NM AU - Lipovka AA AU - Verkhodanov OV AU - Chavira E AD - Russian Acad Sci, St Petersburg Branch Special Astrophys Observ, St Petersburg 196140, RussiaRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachaevo Cher, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoLipovka, NM, Russian Acad Sci, St Petersburg Branch Special Astrophys Observ, Pulkovo, St Petersburg 196140, Russia TI - Studies of bright steep-spectrum radio sources AB - Results of studies of bright radio sources in the constellation Cetus are presented. More than 50% of the sources have radio spectral indices steeper than 0.9. Optical identifications have been determined for 35 sources. A large fraction of the radio sources are identified with weak blue galaxies. Given their spectral indices, it is likely that these objects have redshifts z = 0.4-1.0. More than 20% of the steep-spectrum sources do not have optical identifications and appear to be weak galaxies with z > 2. (C) 2000 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - WOODBURY: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000086045100001 L2 - CLUSTERS SO - Astronomy Reports 2000 ;44(1):1-5 1144 UI - 16363 AU - Liu SM AU - Munoz-Hernandez MA AU - Atwood DA AD - Univ Kentucky, Dept Chem, Lexington, KY 40506, USAUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoAtwood, DA, Univ Kentucky, Dept Chem, Chem Phys Bldg, Lexington, KY 40506 USA TI - Bimetallic and cationic aluminum with N3O2 chelate ligands AB - The ligands aminobis(N-ethylenesaricylidenimine) (SalenN(3)H(3)) and aminobis(N-propylenesalicylidenimine) (SalpenN(3)H(3)) were used to form the bimetallic complexes SaIenN(3)H{AlMe2}(2) (1), SalpenN(3)H{AlMe2}(2) (2), SalenN(3)H{AlMeCl}(2) (3) and SalpenN(3)H{AlMeCl} (4). When extracted in THF 3 and 4 redistribute to form the ionic compounds [SalenN(3)H{Al(THF)}](+) [AlMe2Cl2](-) (5) and [SalpenN(3)H{Al(THF)}](+) [AlMe2Cl2](-) (6). The compounds were characterized by Mp analyses, H-1-NMR and IR, and in the case of 2 and 6 by X-ray crystallography. Additionally, the potential of 5 and 6 to serve as propylene oxide polymerization catalysts was examined. (C) 2000 Elsevier Science S.A. All rights reserved MH - USA MH - Mexico|Morelos PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000085932800018 L2 - bimetallic;cationic;chelate ligands;SCHIFF-BASES; MOLECULAR-STRUCTURE; CRYSTAL-STRUCTURES; SALEN LIGANDS; AMINE ADDUCT; COMPLEXES; DERIVATIVES; REACTIVITY SO - Journal of Organometallic Chemistry 2000 ;596(1-2):109-114 1145 UI - 14790 AU - Llerena GAR AU - Toledano MG AU - Martinez AAH AU - Otero ZAG AU - Varela JA AU - Cardiel MH AD - Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoInst Super Ciencias Med Cuba, Dept Internal Med, La Habana, CubaCardiel, MH, Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Prevalence of musculoskeletal complaints and disability in Cuba. A community-based study using the COPCORD core questionnaire AB - Objective Rheumatic diseases are prevalent conditions around the world, but precise information is not easily obtainable in developing countries. The aim of this study was to estimate the prevalence of musculoskeletal complaints in the community in Cuba using the ILAR/COPCORD core questionnaire and published methodologies. Methods The ILAR/COPCORD core questionnaire was administered in the form of a home survey to 300 adult subjects. Cases, defined as those with present pain and no trauma, underwent a physical examination and selected laboratory or X ray evaluations. Results The questionnaire was filled out in a mean time of 8 minutes. Ninety-one subjects had present musculoskeletal pain not related to trauma and 83 had had pain in the past. The most frequently affected regions were the lower back (14%); cervical spine (14%); knee (11.5%) and shoulders (10%). Osteoarthritis was the most common diagnosis (19.6%). A total of 166 subjects sought professional help; 56 were treated by a rheumatologist. Most subjects were satisfied with the results of their medical treatment. Conclusions Musculoskeletal symptoms were prevalent in this community. A larger study will be necessary to obtain a better estimate of diagnoses with a low prevalence MH - Cuba MH - Mexico|Distrito Federal PB - PISA: CLINICAL & EXPER RHEUMATOLOGY RP - NOT IN FILE U3 - TC 10 U4 - Rheumatology U5 - J;Article AV - English IS - 0392-856X UR - ISI:000165543300016 L2 - musculoskeletal complaints;disability;community survey;WORLD-HEALTH-ORGANIZATION; LEAGUE-AGAINST-RHEUMATISM; UNITED-STATES; ARTHRITIS; DISORDERS; EPIDEMIOLOGY; DISEASES; SEVERITY SO - Clinical and Experimental Rheumatology 2000 ;18(6):739-742 1146 UI - 15529 AU - Llorente L AU - Richaud-Patin Y AU - Garcia-Padilla C AU - Claret E AU - Jakez-Ocampo J AU - Cardiel MH AU - cocer-Varela J AU - Grangeot-Keros L AU - arcon-Segovia D AU - Wijdenes J AU - Galanaud P AU - Emilie D AD - Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoDiaclone, Besancon, FranceInst Paris Sud Cytokines, Clamart, FranceLlorente, L, Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Clinical and biologic effects of anti-interleukin-10 monoclonal antibody administration in systemic lupus erythematosus AB - Objective. To evaluate the safety and clinical efficacy of administering an anti-interleukin-10 (anti-IL-10) monoclonal antibody (mAb) to systemic lupus erythematosus (SLE) patients with active and steroid-dependent disease. In addition, we sought to assess the effects of in vivo IL-10 neutralization on biologic markers of SLE. Methods. Treatment consisted of 20 mg/day intravenous administration of an anti-IL-10 murine mAb (B-N10) for 21 consecutive days, with a followup period of 6 months. Six patients were studied. Results. Treatment was safe and well tolerated. All patients developed antibodies against B-N10. Cutaneous lesions and joint symptoms improved in all patients beginning during B-N10 administration and continuing to month 6. The SLE Disease Activity Index decreased from a mean +/- SEM of 8.83 +/- 0.91 on day 1 to 3.67 +/- 0.67 on day 21 (P = 0.001), 1.50 +/- 0.84 at month 2, and 1.33 +/- 0.80 at month 6 (P < 0.001). At the end of followup, the disease was clinically inactive in 5 of the 6 patients. Prednisone administration was decreased from a mean +/- SEM of 27.9 +/- 5.7 mg/day on day 1 to 9.6 +/- 2.0 mg/day at month 6 (P < 0.005). Activity of immune and endothelial cells rapidly decreased, as assessed by the early evolution of several biologic markers. Conclusion. This is the first report of IL-10 antagonist administration to humans. The study shows the involvement of IL-10 in the pathogenesis of SLE, and indicates that the use of IL-10 antagonists may be beneficial in the management of refractory SLE MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 121 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000088659500015 L2 - B-LYMPHOCYTE HYPERACTIVITY; STEM-CELL TRANSPLANTATION; CD4(+) T-CELLS; ENDOTHELIAL-CELLS; DISEASE-ACTIVITY; CYTOKINE PRODUCTION; INTERLEUKIN-10 PRODUCTION; RHEUMATOID-ARTHRITIS; PERIPHERAL-BLOOD; IFN-GAMMA SO - Arthritis and Rheumatism 2000 ;43(8):1790-1800 1147 UI - 16057 AU - Lloyd DC AU - Edwards AA AU - Moquet JE AU - Guerrero-Carbajal YC AD - Natl Radiol Protect Board, Didcot OX11 0RQ, Oxon, EnglandInst Nacl Invest Nucl, Mexico City 06101, DF, MexicoLloyd, DC, Natl Radiol Protect Board, Didcot OX11 0RQ, Oxon, England TI - The role of cytogenetics in early triage of radiation casualties AB - Preliminary dose estimates by chromosomal analysis can be made rapidly in order to supplement early triage of radiation casualties based on clinical signs. An in vitro simulation of an accident with many casualties receiving whole or partial body exposure in the range 0-8 Gy is described. Faced with an urgent need for rapid results, confirmation of clinical triage can generally be obtained from scoring 20 metaphases per subject. Scoring should be increased to 50 cells where there is disagreement with the initial assessments or evidence of significantly inhomogeneous exposure. (C) 2000 Published by Elsevier Science Ltd. Ail rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000086953700014 SO - Applied Radiation and Isotopes 2000 ;52(5):1107-1112 1148 UI - 15139 AU - Lobo JM AU - Halffter G AD - Inst Ecol, AC, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoLobo, JM, CSIC, Museo Nacl Ciencias Nat, Dept Biodiversidad & Biol Evolut, C Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Biogeographical and ecological factors affecting the altitudinal variation of mountainous communities of coprophagous beetles (Coleoptera : Scarabaeoidea): a comparative study AB - The altitudinal variation in the richness and composition of communities of co-prophagous beetles in a mountainous landscape in Mexico is analyzed and the results obtained are compared with those of similar studies carried out in other parts of the world. Two nonexclusive processes are proposed as responsible for the assemblage of mountain fauna: horizontal colonization by elements originating from lineages distributed at higher latitudes and vertical colonization by lineages distributed at the same latitude but at different altitudes. The current analysis supports the hypothesis that when the horizontal colonization dominates, mountain faunas show a clear altitudinal substitution between large taxa with different evolutionary histories (e.g., Scarabaeinae and Aphodiinae) and the gradient of reduction in species richness is attenuated. This occurs in mountains of different continents and depends primarily on the degree of isolation and general orientation of thr mountain ranges. Conversely, when vertical colonization dominates, mountain faunas show only slight altitudinal substitution, and the reduction in richness is greater MH - Mexico|Veracruz MH - Spain PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 17 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000089631600016 L2 - Scarabaeinae;Aphodiinae;dung beetles;mountain biogeography;BAITED PITFALL TRAPS; COL COMMUNITIES; DUNG; SCARABAEIDAE; AMERICAN; MEXICAN; INSECTS SO - Annals of the Entomological Society of America 2000 ;93(1):115-126 1149 UI - 15188 AU - Lomeli H AU - Ramos-Mejia V AU - Gertsenstein M AU - Lobe CG AU - Nagy A AD - Mt Sinai Hosp, Samuel Lunenfeld Res Inst, Toronto, ON M5G 1X5, CanadaUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Genet & Fisiol Mol, Cuernavaca 62191, Morelos, MexicoSunnybrook Hlth Sci Ctr, Canc Res Div, Toronto, ON M4N 3M5, CanadaUniv Toronto, Dept Biophys, Toronto, ON, CanadaUniv Toronto, Dept Mol & Med Genet, Toronto, ON, CanadaNagy, A, Mt Sinai Hosp, Samuel Lunenfeld Res Inst, 600 Univ Ave, Toronto, ON M5G 1X5, Canada TI - Targeted insertion of Cre recombinase into the TNAP gene: Excision in primordial germ cells MH - Canada MH - Mexico|Morelos PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 32 U4 - Developmental Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1526-954X UR - ISI:000089556600004 L2 - MICE SO - Genesis 2000 ;26(2):116-117 1150 UI - 15949 AU - Lomeli HE AU - Meiss JD AD - Inst Tecnol Autonomo Mexico, Dept Math, Mexico City 01000, DF, MexicoUniv Colorado, Dept Appl Math, Boulder, CO 80309, USAMeiss, JD, Inst Tecnol Autonomo Mexico, Dept Math, Mexico City 01000, DF, Mexico TI - Heteroclinic orbits and Flux in a perturbed integrable Suris map AB - Explicit formulae are given for the saddle connection of an integrable family of standard maps studied by Y. Suris [Func. Anal. Appl. 23 (1989) 74-76]. When the map is perturbed this connection is destroyed, and we use a discrete version of Melnikov's method to give an explicit formula for the first order approximation of the area of the lobes of the resultant turnstile. These results are compared with computations of the lobe area. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000087278100008 L2 - integrable maps;Melnikov method;transport;twist maps;SYMPLECTIC MAPS; DIMENSIONAL MAPPINGS; PRESERVING MAPS; MELNIKOV METHOD; STANDARD TYPE; TWIST MAPS; SYSTEMS; TRANSPORT; TIME SO - Physics Letters A 2000 ;269(5-6):309-318 1151 UI - 16476 AU - Lomeli HE AU - Meiss JD AD - Inst Tecnol Autonomo Mexico, Dept Math, Mexico City 01000, DF, MexicoUniv Colorado, Dept Appl Math, Boulder, CO 80309, USALomeli, HE, Inst Tecnol Autonomo Mexico, Dept Math, Mexico City 01000, DF, Mexico TI - Heteroclinic primary intersections and codimension one Melnikov method for volume-preserving maps AB - We study families of volume preserving diffeomorphisms in R-3 that have a pair of hyperbolic fixed points with intersecting codimension one stable and unstable manifolds. Our goal is to elucidate the topology of the intersections and how it changes with the parameters of the system. We show that the "primary intersection" of the stable and unstable manifolds is generically a neat submanifold of a "fundamental domain." We compute the intersections perturbatively using a codimension one Melnikov function. Numerical experiments show various bifurcations in the homotopy class of the primary intersections. (C) 2000 American Institute of Physics. [S1054-1500(00)01201-5] MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000085563100010 L2 - UNSTABLE MANIFOLDS; TRANSPORT; BIFURCATIONS; MAPPINGS; SYSTEMS; FLOWS SO - Chaos 2000 ;10(1):109-121 1152 UI - 15347 AU - London SJ AU - Romieu I AD - NIEHS, Epidemiol Branch, Res Triangle Pk, NC 27709, USAPan Amer Hlth Org, Mexico City, DF, MexicoLondon, SJ, NIEHS, Epidemiol Branch, Res Triangle Pk, NC 27709, USA TI - Health costs due to outdoor air pollution by traffic MH - Mexico|Distrito Federal MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 6 U4 - Medicine, General & Internal U5 - J;Editorial Material AV - English IS - 0140-6736 UR - ISI:000089101800002 L2 - UNITED-STATES; MORTALITY SO - Lancet 2000 ;356(9232):782-783 1153 UI - 14724 AU - Lopez-Cuevas J AU - Jones H AU - Atkinson HV AD - IPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoUniv Sheffield, Dept Mat Engn, Sheffield S1 4DU, S Yorkshire, EnglandLopez-Cuevas, J, IPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, Mexico TI - Wettability of silica substrates by silver-copper based brazing alloys in vacuo AB - The sessile drop method has been used to determine the time dependence of the contact angle at 850 degreesC in vacuo for Ag-28 wt% Cu, Ag-35 wt% Cu-1.5 wt% Ti, and Ag-27 wt% Cu-12 wt% In-2 wt% Ti on vitreous and devitrified fused quartz substrates. Nonwetting behavior (theta > 90 degrees) was observed for Ag-28 wt% Cu on both substrates vvith no evident effect of time at temperature. The silica substrate structure, whether crystalline or amorphous, as well as its surface condition, whether smooth or rough, made no significant difference. In contrast, with Ag-35 wt% Cu-1.5 wt% Ti and Ag-27 wt% Cu-12 wt% In-2 wt% Ti the contact angle continuously decreased with time for both silica substrates, and the structure and surface condition of the substrates had a negligibie effect in the case of Ag-27 wt% Cu-12 wt% In-2 wt% Ti, which produced essentially the same contact angles on both silica substrates at a given time of hold at 850 degreesC. The contact angles produced by Ag-35 wt% Cu-1.5 wt% Ti on devitrified fused quartz were consistently higher than those produced on the vitreous substrates, with increasing holding time at 850 degreesC. This is attributable to the presence of extensive cracks in the alpha -cristobalite layer at the surface of the devitrified substrates, which obstruct wetting and spreading. These results, when correlated with the wettability of preoxidized silicon carbide by the same alloys reported in previous work, could account for the adverse effect on wetting of the high-temperature silica films formed on the surface of the SIC in that work MH - United Kingdom MH - Mexico|Coahuila PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000165746300003 L2 - CARBIDE; ALUMINUM SO - Journal of the American Ceramic Society 2000 ;83(12):2913-2918 1154 UI - 16555 AU - Lopez-Loera H AU - Urrutia-Fucugauchi J AU - Comparan-Elizondo JL AU - Castillo-Torres R AU - Ponce-Juarez R AU - Jarquin-Pacheco AM AU - Martinez-Vargas E AD - Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Coyoacan 04510, DF, MexicoUniv Autonoma Nuevo Leon, Fac Fis, San Nicolas Los Garzas, Nuevo Leon, MexicoInst Nacl Antropol & Hist, Ctr Colima, Agra 280004, Uttar Pradesh, IndiaUrrutia-Fucugauchi, J, Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Coyoacan 04510, DF, Mexico TI - Magnetic study of archaeological structures in La Campana, Colima, western Mesoamerica AB - Results of a magnetic survey of the archaeological site at La Campana in the Colima area of western Mesoamerica are reported, The site is located in the northern suburbs of the city of Colima over a terrain characterized by volcanic debris avalanche deposits. The study area of about 12,600 m(2) is divided into two sections corresponding to (1) the main archaeological site and to (2) a potential extension north of it. The magnetic survey shows the presence of three large dipolar anomalies oriented N-S or NNE-SSW occurring over small kills some 2 to 4 m high. The archaeological excavations have uncovered three large structures made mainly of rounded volcanic boulders built on large platforms. The southern structure consists of a pyramid (25 x 25 m(2) at its base) and an adjacent structure (at least 30 x 15 m(2)). The central structure is a pyramid (20 x 20 m(2)) with stair-like accesses on either side. The northern structure is a large complex extending over an area at least 40 x 30 m(2). A detailed survey in the open plaza area, using the vertical gradient method, revealed an elongated shallow linear feature, which turned our to be part of a channel network constructed with flat volcanic slabs, Inverted conical openings that end in a small well are connected to the channel network, which was apparently designed to collect water from rain and distribute it to the surrounding structures. The magnetic survey also shows the occurrence of a dipolar anomaly over a small topographic elevation that may likely correspond to another large pyramid. North of it, there is a series of elongated anomalies similar in shape and amplitude to those associated with the hydrological network. The archaeological remains extend over an area considerably larger than the one excavated in the archaeological study. The characteristics and size of the pyramidal structures, the plazas and channel network, and the apparent overall extension of the archaeological site strongly suggests that La Campana constituted a major urban and ceremonial center in westernmost Mesoamerica, (C) 2000 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Mining & Mineral Processing U5 - J;Article AV - English IS - 0926-9851 UR - ISI:000085193900009 L2 - magnetic;archaeological;La Campana;VOLCANIC COMPLEX; MEXICO SO - Journal of Applied Geophysics 2000 ;43(1):101-116 1155 UI - 15443 AU - Lopez-Lopez M AU - Mendez-Garcia VH AU - Melendez-Lira M AU - Luyo-Alvarado J AU - Tamura M AU - Momose K AU - Yonezu H AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoToyohashi Univ Technol, Dept Elect & Elect Engn, Toyohashi, Aichi 441, JapanLopez-Lopez, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Molecular beam epitaxial growth of ZnSe layers on GaAs and Si substrates AB - We present a study of the molecular beam epitaxial (MBE) growth of ZnSe layers on GaAs and Si substrates. For the growth on GaAs substrates we investigated the effects of introducing buffer layers of AlxGa1-xAs and InxGa1-xAs. The characterization by reflection high-energy electron dif- fraction (RHEED), atomic force microscopy (AFM), transmission electron microscopy (TEM), and photoluminescence spectroscopy (PL) showed that best ZnSe crystal quality was obtained on buffer layers of AlxGa1-xAs and InxGa1-xAs with x = 0.01. Moreover, an analysis by secondary ion mass spectroscopy (SIMS) revealed that the use of AlGaAs buffer layers effectively suppresses the Ga segregation onto the ZnSe layer surfaces. On the other hand, for the growth of ZnSe on Si substrates, we achieved a significant improvement in the crystal quality of ZnSe by irradiating the Si substrates with a plasma of nitrogen prior to the MBE growth MH - Japan MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800017 L2 - HIGH-QUALITY ZNSE; MISFIT DISLOCATIONS; LASER-DIODES; FILMS; SURFACE SO - Physica Status Solidi B-Basic Research 2000 ;220(1):99-109 1156 UI - 15824 AU - Lopez-Lopez M AU - Luyo-Alvarado J AU - Melendez-Lira M AU - Cano-Aguilar O AU - Megia-Garcia C AU - Ortiz-Lopez J AU - Contreras-Puente G AU - Ishikawa T AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoIPN, Escuela Super Fis & Matemat, Dept Phys, Mexico City 07738, DF, MexicoOptoelect Technol Res Lab, Tsukuba, Ibaraki 30026, JapanLopez-Lopez, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, Mexico TI - Study of AlGaAs/GaAs quantum wells overgrown on in situ Cl-2-etched GaAs substrates AB - We have studied the properties of in situ Cl-2-etched GaAs surfaces and overgrown quantum well (QW) structures as a function of the etching temperature. From reflection high-energy electron diffraction, atomic force microscopy, and Auger electron spectroscopy analysis on Cl-2-etched surfaces we found that low etching temperatures (similar to 50 degrees C) results in Ga-rich rough surfaces, because at these temperatures the desorption rate of Ca chlorides is much slower than that for As chlorides. At high etching temperatures (similar to 200 degrees C) both Ga and As chlorides can be removed, resulting in a more stoichiometric etching which yields a smooth GaAs surface. The optical properties of QW structures overgrown on in situ etched surfaces were compared to those of an ex situ processed sample. For the cn: situ processed sample we found degraded photoluminescence (PL) characteristics and a high amount of impurities. The PL properties improved, and the amount of impurities sharply decreased in the ill situ sample Cl-2 etched at 200 degrees C. Photoreflectance spectroscopy showed the presence of intense internal electric fields generated by the ex situ processing. The electric field strength was reduced in the in situ Cl-2-etched samples. (C) 2000 American Vacuum Society. [S0734-211X(00)00703-4] MH - Japan MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000087654200083 L2 - SURFACES; LAYERS; GAS SO - Journal of Vacuum Science & Technology B 2000 ;18(3):1553-1556 1157 UI - 16661 AU - Lopez-Malo A AU - Guerrero S AU - Alzamora SM AD - Univ Las Amer Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, MexicoUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ind, RA-1428 Buenos Aires, DF, ArgentinaLopez-Malo, A, Univ Las Amer Puebla, Dept Ingn Quim & Alimentos, Sta Catarina Martir, Puebla 72820, Mexico TI - Probabilistic modeling of Saccharomyces cerevisiae inhibition under the effects of water activity, pH, and potassium sorbate concentration AB - Probabilistic microbial modeling using logistic regression was used to predict the boundary between growth and no growth of Saccharomyces cerevisiae at selected incubation periods (50 and 350 h) in the presence of growth-controlling factors such as water activity (a(w); 0.97, 0.95, and 0.93), pH (6.0, 5.0, 4.0, and 3.0), and potassium sorbate (0, 50, 100, 200, 500, and 1,000 ppm). The proposed model predicts the probability of growth under a set of conditions and calculates critical values of a(w), pH, and potassium sorbate concentration needed to inhibit yeast growth for different probabilities. The reduction of pH increased the number of combinations of a(w) and potassium sorbate concentration with probabilities to inhibit yeast growth higher than 0.95. With a probability of growth of 0.05 and using the logistic models, the critical pH values were higher for 50 h of incubation than those required for 350 h. With lower a(w) values and increasing potassium sorbate concentration the critical pH values increased. Logistic regression is a useful tool to evaluate the effects of the combined factors on microbial growth MH - Argentina MH - Mexico|Puebla PB - DES MOINES: INT ASSOC MILK FOOD ENVIRONMENTAL SANITARIANS, INC RP - NOT IN FILE U3 - TC 16 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000084695400014 L2 - NO GROWTH INTERFACE; MICROBIAL-GROWTH; TEMPERATURE; FOODS; TIME SO - Journal of Food Protection 2000 ;63(1):91-95 1158 UI - 14836 AU - Lopez-Mimbela JA AU - Wakolbinger A AD - Univ Frankfurt, FB Math, D-60054 Frankfurt, GermanyLopez-Mimbela, JA, Apartado Postal 402, Guanajuato 36000, Mexico TI - A probabilistic proof of non-explosion of a non-linear PDE system AB - Using a representation in terms of a two-type branching particle system, we prove that positive solutions of the system (u) over dot = Au + uv, (v) over dot = Bv + uv remain bounded for suitable bounded initial conditions, provided A and B generate processes with independent increments and one of the processes is transient with a uniform power decay of its semigroup. For the case of symmetric stable processes on R-1, this answers a question raised in [4] MH - Germany MH - Mexico|Guanajuato PB - SHEFFIELD: APPLIED PROBABILITY TRUST RP - NOT IN FILE U3 - TC 4 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0021-9002 UR - ISI:000165452900003 L2 - branching particle system;Yule tree;semilinear partial differential equation;global solution SO - Journal of Applied Probability 2000 ;37(3):635-641 1159 UI - 14267 AU - Lopez-Munoz FJ AU - Ventura R AU - Diaz MI AU - Hernandez GP AU - Dominguez AM AU - Garcia ML AU - Cabre F AU - Mauleon D AD - IPN, CINVESTAV, Dept Pharmacobiol, Mexico City, DF, MexicoUniv Autonoma Metropolitan Xochimilco, Div Biol & Hlth Sci, Dept Biol Syst, Mexico City, DF, MexicoLabs Menarini SA, R&D Dept, Badalona, SpainLopez-Munoz, FJ, IPN, CINVESTAV, Dept Pharmacobiol, Mexico City, DF, Mexico TI - Analysis of antinociceptive effects of flurbiprofen enantiomers in a rat model of arthritic pain AB - The potential antinociceptive effects of the S(+)- and R(-)enantiomers of flurbiprofen (SFB and RFB, respectively) were investigated when given intravenously to rats using the pain-induced functional impairment model in the rat (PIFIR), an animal model of arthritic pain. Groups of 6 rats received either vehicle or the enantiomer in turn and antinociception was determined by evaluating the dose-response carves over time. Although SFB and RFB produced dose-dependent effects with similar effects with similar efficacy (SFB: 277.4 +/- 29.9 au and RFB: 293.5 +/- 20.1 au), the R(-)-enantiomer was unable to produce any antinociceptive action when assessed at the same dose ranges as SFB. It was necessary to increase the dose of RFB by 100 times to produce similar antinociception. Accordingly, S(+)-flurbiprofen was 100-fold more potent (ED50 = 0.33 +/- 0.13 mg/kg) than its antipode R(-)-(ED50 = 30.0 +/- 1.7 mg/kg). SFB generated from metabolic inversion (> 1%) after i.v. dosage of RFB, as well as impurities of SFB present in RFB preparations, tend to confirm the hypothesis that the efficacy of RFB achieved at 100 mg/kg, similar to that observed with 1 mg/kg of SFB, is attributable to SFB. (C) 2000 Prous Science. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: PROUS SCIENCE, SA RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0379-0355 UR - ISI:000167031800008 L2 - antinociception;NSAID;flurbiprofen;enantiomers;PIFIR model;rat;DRUGS; ACID; INHIBITION; ASPIRIN; SODIUM SO - Methods and Findings in Experimental and Clinical Pharmacology 2000 ;22(8):641-644 1160 UI - 16429 AU - Lopez-Portillo J AU - Ewers FW AU - Angeles G AU - Fisher JB AD - AC, Inst Ecol, Xalapa 91000, Veracruz, MexicoMichigan State Univ, Dept Bot & Plant Pathol, E Lansing, MI 48824, USAFairchild Trop Garden, Miami, FL 33156, USALopez-Portillo, J, AC, Inst Ecol, Apdo Postal 63, Xalapa 91000, Veracruz, Mexico TI - Hydraulic architecture of Monstera acuminata: evolutionary consequences of the hemiepiphytic growth form AB - The hydraulic architecture of the secondary hemiepiphyte Monstera acuminata was examined in native plants from Los Tuxtlas, Veracruz, Mexico, to determine how it compared to better-known growth forms such as trees, shrubs, lianas and primary hemiepiphytes. Monstera acuminata starts its life cycle as a prostrate herb. As it ascends a tree or other vertical support, the stem becomes thicker, produces larger leaves, and may die back from the base upwards until only aerial feeding roots serve to connect the stem to the soil. Unlike the pattern of vessel-size distribution along the stems of woody dicotyledons, M. acuminata has its wider vessels at the top of the stem, decreasing in diameter towards the base. Also peculiar is the fact that Huber values (axis area/distal leaf area) tend to increase exponentially at higher positions within the plant. Based on the hydraulic conductivity (k(h)) and leaf-specific conductivity (LSC, K-h/distal leaf area), the base of the stem potentially acts as a severe hydraulic constriction. This constriction is apparently not limiting, as aerial roots are produced further up the stem. The plants have remarkably strong root pressures, up to 225 kPa, which may contribute to the maintenance of functional vessels by refilling them at night or during periods of very high atmospheric humidity, as in foggy weather and rain. In common with dicotyledonous plants, vessel length, vessel diameter, k(h), specific conductivity (k(s), k(h)/axis area) and LSCs were all positively correlated with axis diameter. The features of the hydraulic architecture of M. acuminata may be an evolutionary consequence of an anatomical constraint (lack of vascular cambium and therefore of secondary growth) and the special requirements of the hemiepiphytic growth form MH - Mexico|Veracruz MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0028-646X UR - ISI:000085597200012 L2 - Monstera acuminata;Araceae;secondary hemiepiphytes;root pressure;hydraulic architecture;xylem vessels;functional morphology;climbing plants;WATER RELATIONS; TROPICAL LIANAS; ACER-SACCHARUM; WOODY-PLANTS; THUJA-OCCIDENTALIS; ROOT PRESSURES; VESSEL-LENGTH; STEMS; VULNERABILITY; EMBOLISM SO - New Phytologist 2000 ;145(2):289-299 1161 UI - 15239 AU - Lopez-Rubalcava C AU - Hen R AU - Cruz SL AD - CINVESTAV, Secc Terapeut Expt, Dept Farmacol & Toxicol, Mexico City 14000, DF, MexicoInst Mexicano Psiquiat, Div Neurociencias, Mexico City, DF, MexicoColumbia Univ, Ctr Neurobiol & Behav, New York, NY 10032, USALopez-Rubalcava, C, CINVESTAV, Secc Terapeut Expt, Dept Farmacol & Toxicol, POB 22026, Mexico City 14000, DF, Mexico TI - Anxiolytic-like actions of toluene in the burying behavior and plus-maze tests: differences in sensitivity between 5-HT1B knockout and wild-type mice AB - This paper compares the anxiolytic-like actions of toluene in two anxiety paradigms, the burying behavior and plus-maze tests, in 5-HT1B knockout (KO) and 129/Sv-ter wild-type (WT) mice. Static exposures were conducted in 29-1 gas chromatographic jars. Animals were exposed to toluene (0, 1000, 2000 or 4000 ppm; n = 8-12, each) for 30 min, and immediately after, tested in one of the anxiety paradigms. Motor coordination was evaluated in the rota-rod test in independent groups of mice. Toluene produced a dose-dependent decrease in anxiety-like levels in both anxiety paradigms and in both the strains. However, toluene exerted its effects at lower concentrations in KO mice than in the WT strain. These results cannot be attributed to a decrease in motor coordination since all the animals behaved similarly in the rota-rod test, regardless of the treatment. To discard any inherent difference in the nociception threshold between strains, mice were tested in the hot plate immediately after being exposed to either air or toluene. Toluene increased nociception in a similar fashion in both the strains. Our results suggest that 5-HT1B KO mice are more sensitive to those of toluene's actions related to anxiety, but not to those related with motor coordination or nociception. Data are discussed in terms of toluene's mechanisms of action and on differences between WT and KO animals. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000089374500010 L2 - toluene;5-HT1B knockout mice;anxiety;burying behavior;elevated plus-maze;ACETYLCHOLINE-RELEASE; LOCOMOTOR-ACTIVITY; RAT-BRAIN; RECEPTORS; ANXIETY; ETHANOL; PARADIGM; DIAZEPAM; LACKING; AGENTS SO - Behavioural Brain Research 2000 ;115(1):85-94 1162 UI - 16543 AU - Lopez-Salinas E AU - Hernandez-Cortez JG AU - Schifter I AU - Torres-Garcia E AU - Navarrete J AU - Gutierrez-Carrillo A AU - Lopez T AU - Lottici PP AU - Bersani D AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoINFM, I-43100 Parma, ItalyUniv Parma, Dipartimento Fis, I-43100 Parma, ItalyLopez-Salinas, E, Inst Mexicano Petr, Eje Cent L Cardenas 152, Mexico City 07730, DF, Mexico TI - Thermal stability of 12-tungstophosphoric acid supported on zirconia AB - A freshly precipitated zirconia was impregnated with an ethanol solution of H-3[W12PO40].6H(2)O (TPA) in order to obtain 0-25 wt.% TPA/ZrO2, The solids, heat-treated from 373 to 1073 K, were examined by means of differential thermal analysis, X-ray diffraction, surface area, infrared, Raman, P-31 nuclear magnetic resonance analyses, and used as catalysts in the decomposition of isopropanol. Below 673 K, TPA on ZrO2 exist as distorted intact Keggin species interacting with =Zr-OH or =Zr+ groups. However, at 773 K, bulk-like intact TPA species were detected. Above 773 K, the Keggin structure of TPA collapse and transforms into WO3 and phosphorous oxides. The characteristic diffraction peaks of TPA cannot be observed even with 20 wt.% TPA loading, indicating a high dispersion or a very small crystal size of TPA, while 20 wt.% TPA loaded on SiO2 clearly shows the presence of TPA particles,The heat-treatment temperature affects the catalytic activity of TPA on Zirconia. The reaction rate was 3.3 times higher in a TPA/ZrO2 calcined at 773 than that at 473 K. (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 45 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000085291300022 L2 - 12-tungstophosphoric acid;heteropolyacid;ZrO2;HETEROPOLY ACID; FT-IR; CATALYSTS; CARBON; OXIDE; NMR SO - Applied Catalysis A-General 2000 ;193(1-2):215-225 1163 UI - 15637 AU - Lopez-Upton J AU - White TL AU - Huber DA AD - Univ Florida, Sch Forest Resources & Conservat, IFAS, Gainesville, FL 32611, USAColegio Postgrad Ciencias Agr, IRENAT, Especialidad Forestal, Montecillo 56230, Mex, MexicoHuber, DA, Univ Florida, Sch Forest Resources & Conservat, IFAS, Gainesville, FL 32611 USA TI - Species differences in early growth and rust incidence of loblolly and slash pine AB - Eleven field tests with two silvicultural treatments (intensive and less intensive) with three taxa (improved and unimproved Pinus elliottii and improved P. taeda) were established by the Cooperative Forest Genetics Research Program in the lower coastal plains of the southeast USA. Results from assessment at 3-years-old indicate that P. taeda is consistently taller with less rust incidence than P. elliottii in both intensive and less intensive cultures. The early superiority of P. taeda was only partially due to its lower rust incidence. The more intensive silvicultural treatment increased third-year height growth and also height differences among taxa on all sites. A slight increase of rust incidence was produced by increasing intensive management (29.2-33.6%). The increase in cultural management did not alter the ratios of infection percentages of any two taxa. The ratios of any two taxa, one to another, were essentially constant across all sites and in both silvicultural treatments. Significant genetic gain from breeding for rust resistance was detected at this age for P. elliottii. When 50% of unimproved P. elliottii trees were infected, 36.8% of improved P. elliottii trees were infected. For height growth, improved material was 4 and 8% taller than unimproved P. elliottii in less intensive and intensive treatment, respectively. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Estado De Mexico PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000088191400008 L2 - Pinus elliottii;Pinus taeda;culture intensity;realized gains;early growth;rust resistance;TREE IMPROVEMENT; WEED-CONTROL; FERTILIZATION SO - Forest Ecology and Management 2000 ;132(2-3):211-222 1164 UI - 15550 AU - Lopez AM AD - Univ Puerto Rico, Dept Phys, Mayaguez, PR 00681, USAUniv Calif Davis, Davis, CA 95616, USACBPF, Rio De Janeiro, BrazilCINVESTAV, Mexico City 14000, DF, MexicoCU, Boulder, CO, USAIst Nazl Fis Nucl, Frascati, ItalyUniv Illinois, Champaign, IL 61820, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAYonsei Univ, Seoul 120749, South KoreaLopez, AM, Univ Puerto Rico, Dept Phys, Mayaguez, PR 00681, USA TI - Preliminary results from FOCUS AB - Fermilab's FOCUS experiment obtained a very high statistics sample of charmed particle decays. Preliminary results on spectroscopy, doubly Cabibbo suppressed decays and lifetimes are presented MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000088426600032 SO - Nuclear Physics A 2000 ;675(1-2):173C-178C 1165 UI - 15765 AU - Lopez FJM AU - Guillen-Navarro EA AU - Guerrero-Naranjo JL AU - Rodriguez-Reyes A AU - Ochoa-Contreras D AU - Chacon-Acuna C AU - Quiroz-Mercado H AU - randa-Rabago J AU - Cardillo J AD - Hosp Dr Luis Sanchez Buines, Asociac Evitar Ceguera Mexico, Mexico City, DF, MexicoUNAM, Mexico City, DF, MexicoUniv Sao Paulo, BR-05508 Sao Paulo, Brazil TI - Use of intravitreal hyaluronidase in the prevention of proliferative vitreoretinopathy (PVR) and associated retinal detachment (RD) in an experimental rabbit model of posterior penetrating eye injury MH - Brazil MH - Mexico|Distrito Federal PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246701808 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S345-S345 1166 UI - 15523 AU - Lopez JA AU - Meaburn J AU - Rodriguez LF AU - Vazquez R AU - Steffen W AU - Bryce M AD - UNAM, Inst Astron, Ensenada 22800, Baja California, MexicoUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Nacl Autonoma Mexico, CU, Inst Astron, Mexico City 04510, DF, MexicoUniv Guadalajara, Inst Aston & Meteorol, Guadalajara 44130, Jalisco, MexicoLopez, JA, UNAM, Inst Astron, Apdo Postal 877, Ensenada 22800, Baja California, Mexico TI - The formation of a multiple planetary nebula: Hubble Space Telescope/WFPC2 observations of KjPn 8 AB - KjPn 8 is an extreme polypolar planetary nebula with a large-scale structure characterized by a giant biconical envelope. Spasmodic bipolar ejections in changing directions have occurred over thousands of years to create this peculiar nebula. Narrowband images of the core of KjPn 8 have now been obtained with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope (HST) and are reported here. The central star is finally revealed in these observations, and its compact nebular core is resolved into a remarkably young elliptical ring, currently expanding at only 16 km s(-1). This ring is the ionized inner region of larger molecular CO and H-2 counterparts, all sharing the same orientation. The highest speed and youngest outflows are perpendicular to this central ring, which is identified as the latest event in the creation of this nebula. It is shown that the formation history of KjPn 8 has involved two distinct and consecutive planetary nebulae-like events, probably originating from a binary core evolution with components of very similar mass. These characteristics indicate that KjPn 8 may be a rare object in our Galaxy and the first ever detected of this class MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000088706000025 L2 - ISM : jets and outflows;planetary nebulae : individual (KjPn 8);radio lines : ISM;PREPLANETARY NEBULAE; MOLECULAR DISK; EPISODIC JET; GIANT HALO; BIPOLAR; NGC-6543; STARS; EVOLUTION; BINARY; MASS SO - Astrophysical Journal 2000 ;538(1):233-240 1167 UI - 14996 AU - Lopez LL AU - Portelles J AU - Siqueiros JM AU - Hirata GA AU - McKittrick J AD - Univ Calif San Diego, MAE Dept, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci Program, La Jolla, CA 92093, USAUNAM, CCMC, Ensenada 22800, Baja California, MexicoHirata, GA, Univ Calif San Diego, MAE Dept, La Jolla, CA 92093, USA TI - Ba0.5Sr0.5TiO3 thin films deposited by PLD on SiO2/Si RuO2/Si and Pt/Si electrodes AB - Stoichiometric barium strontium titanate (Ba0.5Sr0.5TiO3 or BST) 220-nm thick thin films were deposited by pulsed laser ablation on SiO2/Si, RuO2/Ta/SiO2/Si and Pt/Ti/SiO2/Si substrates at 400 degreesC. The films were weakly crystalline as-deposited. Crystallization was induced by annealing the films in the range of 550-650 degreesC. The BST films deposited on Pt/Ti/SiO2/c-Si substrates presented wide cracks that were promoted during the annealing process due to the thermal expansion mismatch between the BST films (alpha (BST) = 4 x 10(-6) degreesC(-1)) and the Pt (alpha (Pt) = 9 x 10(-6) degreesC(-1)). Smooth films showing slightly cracked areas were obtained on SiO2/c-Si and RuO2/Ta/SiO2/Si substrates. The ruthenium oxide thermal expansion coefficient is alpha (RuO2) = 5.2 x 10(-6) degreesC(-1). A cross-sectional analysis at the ferroelectric/substrate interface showed that for the lower annealing temperature (550 degreesC) a mixed amorphous/nanocrystalline microstructure is formed. For temperatures above 600 degreesC a randomly oriented polycrystalline material is obtained. However, an amorphous layer of 4-6 nm still remains on the substrate even after heat-treatments up to 650 degreesC. The dielectric constant of the BST films varied in the range of 30-325. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Baja California MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900013 L2 - laser ablation;structural properties;transmission electron microscopy;X-ray diffraction;CHEMICAL-VAPOR-DEPOSITION; DIELECTRIC-PROPERTIES SO - Thin Solid Films 2000 ;373(1-2):49-52 1168 UI - 16127 AU - Lopez P AU - Galaviz IA AU - Allen LH AU - Garcia OP AU - Isoard F AU - Rosado JL AD - Natl Inst Nutr, Mexico City, DF, MexicoUniv Calif Davis, Davis, CA 95616, USA TI - Iron supplementation alone is as effective as iron plus other micronutrients to reduce anemia MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918103243 SO - Faseb Journal 2000 ;14(4):A561-A561 1169 UI - 16107 AU - Lopez RG AU - Trevino ME AU - Peralta RD AU - Cesteros LC AU - Katime I AU - Flores J AU - Mendizabal E AU - Puig JE AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, Vizcaya 48080, SpainPuig, JE, Univ Guadalajara, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - A kinetic description of the free radical polymerization of vinyl acetate in cationic microemulsions AB - The polymerization of vinyl acetate (VA) in three-component microemulsions stabilized with the cationic surfactant, cetyltrimethylammonium bromide (CTAB), is investigated as a function of concentrations of monomer and initiator (V-50) and temperature. Stable latexes containing small particles (35-50 nm) of poly(vinyl acetate) with average number molar masses of (4-5) x 10(5) g/mol are obtained. Analysis of the molar mass distributions (MMD) indicates that the controlling chain growth termination mechanism is chain transfer to monomer, and not to polymer, which is the dominant; termination mechanism for the emulsion polymerization of this monomer, especially at high conversions. Deconvolution of the MMD curves and measurement of the radius of gyration as a function of molar mass show that more than 80% of the final polymer is linear, produced by chain transfer to monomer, whereas the rest may be branched, probably formed by chain transfer to polymer or by terminal double bond reactions. The population of linear polymer decreases with decreasing reaction temperature, but it is independent of initiator and monomer concentrations MH - Mexico|Coahuila MH - Mexico|Jalisco MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000086676700014 L2 - 3-COMPONENT ANIONIC MICROEMULSIONS; EMULSION POLYMERIZATION; METHYL-METHACRYLATE; PARTICLE NUCLEATION; MOLECULAR-WEIGHT; STYRENE; MECHANISM; BROMIDE SO - Macromolecules 2000 ;33(8):2848-2854 1170 UI - 14986 AU - Lora PO AU - Sjolund M AU - Tracol C AU - Morvan J AD - Ecole Natl Super Chim Rennes, Lab Chim Nuisance & Genie Environm, F-35700 Rennes, FranceLora, PO, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Adaptation of an inoculum to 2,4,6-trichlorophenol biodegradation in an activated-sludge bioreactor AB - The aim of this work is to study the acclimation of an activated sludge inoculum fed at a constant COD volumetric load, to a recalcitrant substrate: 2,4,6-TCP. Phenol was used as an inductive and energy-supplier co-substrate and was progressively replaced by TCP. A loss in TCP removal activity to a value of 40 and then 6% was the result of two events: a shock load due to the first TCP addition that had represented 5% of the COD volumetric load and a second shock achieved with a 100% TCP inlet. This last overload stage was characterized by the reduction of non-TCP halogenated compounds concentration in the reactor effluent. On the other hand, the progressive increase of TCP generated a loss in dehalogenation and mineralization activities while TCP removal rate remained high. A load of 11.3 mgCOD.g(-1)VSS.h(-1) of TCP as sole carbon and energy source was achieved and was accompanied with a net biomass production MH - France MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400027 L2 - biodegradation;biomass acclimation;chlorophenol;dehalogenation;mineralization;MIXED CULTURES; BACTERIA; TOXICITY; PHENOL; PH SO - Water Science and Technology 2000 ;42(5-6):179-183 1171 UI - 15725 AU - Lorenzana ER AU - Allen EP AD - Texas A&M Univ Syst, Baylor Coll Dent, Dallas, TX, USAUniv Nuevo Leon, Monterrey, MexicoLorenzana, ER, 4871 Fredericksburg Rd, San Antonio, TX 78229, USA TI - The single-incision palatal harvest technique: A strategy for esthetics and patient comfort AB - The use of connective tissue grafts for root coverage and ridge augmentation is a proven, effective treatment modality Complications associated with the palatal donor site can arise because of incomplete primary closure of the palatal wound or sloughing of the overlying tissue. This article presents a new technique for the atraumatic harvesting of connective tissue grafts from palatal donor sites. The main advantage of this single-incision technique is the primary closure of the palatal flap, resulting in less pain and sensitivity and fewer postoperative complications. A review of the technique and its indications, rationale, and limitations is presented MH - Mexico|Nuevo Leon MH - USA PB - CAROL STREAM: QUINTESSENCE PUBL CO INC RP - NOT IN FILE U3 - TC 12 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0198-7569 UR - ISI:000087931500009 L2 - CONNECTIVE-TISSUE GRAFT; DOUBLE PEDICLE GRAFT; FREE PERIOSTEUM; BONE FORMATION; ROOT COVERAGE; THICKNESS; DEFECTS; HUMANS SO - International Journal of Periodontics & Restorative Dentistry 2000 ;20(3):297-306 1172 UI - 15458 AU - Losev A AU - Vlaev SJ AU - Mishonov T AD - Inst Gen & Inorgan Chem, BG-1113 Sofia, BulgariaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, MexicoUniv Sofia, Dept Phys, BG-1126 Sofia, BulgariaLosev, A, Inst Gen & Inorgan Chem, 11 G Bonchev Str, BG-1113 Sofia, Bulgaria TI - Local density of states for solids in an electric field AB - The local densities of states (LDOSs) in electrified simple cubic crystals have been studied within the semi-empirical tight-binding (TB) model. One-dimensional (1D), two-dimensional.(2D) and three-dimensional (3D) cases are investigated, taking into account first neighbours and one band, when an external constant electric field with arbitrary direction is applied. The increasing strength of the field in a given direction turns smoothly the LDOSs of an n-dimensional crystal (n = 1, 2, 3) into the LDOSs of an (n - 1)-dimensional crystal. The Wannier-Stark ladder phenomenon for crystals of different dimensionalities is discussed and the role of the electric field strength for the effective crystal dimension is assessed. The LDOSs are calculated by means of a new convolution technique which allows to compute the results faster than any conventional method MH - Bulgaria MH - Mexico|Zacatecas PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800134 L2 - WANNIER-STARK LOCALIZATION; GRADED-GAP SUPERLATTICE; MINIBAND FORMATION; SPECTRUM; LADDERS; WELLS SO - Physica Status Solidi B-Basic Research 2000 ;220(1):747-752 1173 UI - 15938 AU - Lousa A AU - Esteve J AU - Muhl S AU - Martinez E AD - Univ Barcelona, Dept Fis Aplicada & Opt, E-08028 Barcelona, Catalunya, SpainNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoLousa, A, Univ Barcelona, Dept Fis Aplicada & Opt, Avda Diagonal 647, E-08028 Barcelona, Catalunya, Spain TI - BCN thin films near the B4C composition deposited by radio frequency magnetron sputtering AB - Materials with composition within the system B-C-N are very interesting because they are expected to combine some of the excellent properties of BN, B4C and C3N4. In this work our interest is focused on the region around B4C in the B-C-N composition diagram. Films were deposited by radio frequency magnetron sputtering using a target of sintered B4C. A mixture of Ar and N-2 was used as the plasma gas at a constant working pressure of 2 x 10(-3) mbar, and with variable N-2/Ar composition. The substrate was heated to 500 degrees C. Film composition, structure, and mechanical properties are presented. As the N-2/Ar content in the plasma gas is varied from 0 to 10%, both secondary ion mass spectroscopy and X-ray photoelectron spectroscopy analyses show a continuous increase in the nitrogen incorporated into the film. From the Fourier transform IR spectra, a structure evolution from B4C towards h-BN can be deduced. Film growth rate increased from 0.5 mu m/h to 1 mu m/h, whereas film stress decreased from 5 GPa to 2 GPa, and him hardness also decreased from 26 GPa to 12 GPa. From these results, a suitable value of the N-2/Ar plasma gas composition can be selected in order to deposit films with a satisfactory low stress while keeping a sufficiently high hardness, as required in hard coating applications. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 22 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0925-9635 UR - ISI:000087382400053 L2 - carbides;hard materials;magnetron sputtering;thin films;BN-C FILMS; TARGET SO - Diamond and Related Materials 2000 ;9(3-6):502-505 1174 UI - 12556 AU - Lovera M AU - Sira-Ramirez H AU - Siguerdidjane H AU - Devaud E AD - Politecn Milan, Dipartimento Elettr & Informaz, I-20133 Milan, ItalyIPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 7300, DF, MexicoEcole Super Elect, Serv Automat, F-91192 Gif Sur Yvette, FranceAerospatiale Matra Missiles, F-92323 Chatillon, FranceLovera, M, Politecn Milan, Dipartimento Elettr & Informaz, 32 Piazza Leonardo da Vinci, I-20133 Milan, Italy TI - Discussion on: 'Nonlinear missile autopilot design based on angle of attack' by H. Siguerdidjane and E. Devaud MH - France MH - Italy MH - Mexico|Distrito Federal PB - PARIS: HERMES SCIENCE PUBLICATION RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Editorial Material AV - English IS - 0947-3580 UR - ISI:000171806300006 L2 - SYSTEMS; FLATNESS SO - European Journal of Control 2000 ;6(2):165-169 1175 UI - 15887 AU - Luan P AU - rechaga-Ocampo E AU - Sarath G AU - rredondo-Peter R AU - Klucas RV AD - Univ Nebraska, Beadle Ctr, Dept Biochem, Lincoln, NE 68588, USAUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijacion Nitrogeno, Cuernavaca 62210, Morelos, MexicoKlucas, RV, Univ Nebraska, Beadle Ctr, Dept Biochem, Lincoln, NE 68588 USA TI - Analysis of a ferric leghemoglobin reductase from cowpea (Vigna unguiculata) root nodules AB - Ferric leghemoglobin reductase (FLbR), an enzyme reducing ferric leghemoglobin (Lb) to ferrous ib, was purified from cowpea (Vigna unguiculata) root nodules by sequential chromatography on hydroxylapatite followed by Mono-V HR5/5 FPLC and Sephacryl S-200 gel filtration. The purified cowpea FLbR had a specific activity of 216 nmol Lb(2+)O(2) formed min(-1) mg(-1) of enzyme for cowpea Lb(3+) and a specific activity of 184 nmol Lb(2+)O(2) formed min(-1) mg(-1) of enzyme for soybean Lb(3+). A cDNA clone of cowpea FLbR was obtained by screening a cowpea root nodule cDNA library. The nucleotide sequence of cowpea FLbR cDNA exhibited about 88% similarity with soybean (Glycine max) FLbR and 85% with pea (Pisum sativum) dihydrolipoamide dehydrogenase (DLDH, EC 1.8.1.4) cDNAs. Conserved regions for the FAD-binding site, NAD(P)H-binding site, and disulfide active site were identified among the deduced amino acid sequences of cowpea FLbR, soybean FLbR, pea DLDH and other enzymes in the family of the pyridine nucleotide-disulfide oxido-reductases. (C) 2000 Published by Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0168-9452 UR - ISI:000087437200007 L2 - cowpea;dihyrodrolipoamide dehydrogenase;ferric leghemoglobin reductase;leghemoglobin;symbiotic nitrogen fixation;Vigna unguiculata;LIPOAMIDE DEHYDROGENASE; NUCLEOTIDE-SEQUENCE; SOYBEAN NODULES; MITOCHONDRIA; PURIFICATION SO - Plant Science 2000 ;154(2):161-170 1176 UI - 14635 AU - Lucas-Clark J AU - Helenes J AD - Clark Geol Serv, Fremont, CA 94536, USACICESE, Dept Geol, Ensenada, Baja California, MexicoLucas-Clark, J, Clark Geol Serv, 1023 Old Canyon Rd, Fremont, CA 94536 USA TI - Ynezidinium, a new genus within the Gonyaulacaceae (fossil Dinophyceae) AB - Ynezidinium malloyi gen. nov., sp. nov, shows paratabulation details that indicate it belongs to the Family Gonyaulacaceae, subfamily Leptodiniodeae, but which, in combination, distinguish it from previously described genera. The paratabulation details include: (1) pentagonal sixth precingular (li) in contact with both fourth and first apicals (A and lu); (2) elongate and subparallel fourth and first apicals; (3) straight to slightly sigmoidal sulcal region; (4) lack of small intercalary (K) paraplates; and (5) Q/B preapical arrangement. Other species herein assigned to :Ynezidinium include: Ynezidinium brevisulcatum (Michoux, 1985) comb. nov., Y. latolineatum (Yun, 1981) comb, nov., Y. pentahedrias (Damassa, 1979) comb, nov, and Y. waipawaense (Wilson, 1988) comb. nov MH - Mexico|Baja California MH - USA PB - BATH: GEOLOGICAL SOC PUBL HOUSE RP - NOT IN FILE U3 - TC 0 U4 - Paleontology U5 - J;Article AV - English IS - 0262-821X UR - ISI:000166021900002 SO - Journal of Micropalaeontology 2000 ;19():113-121 1177 UI - 16547 AU - Lucio JL AU - Napsuciale M AU - Scadron MD AU - Villanueva VM AD - Univ Guanajuato, Inst Fis, Guanajuato 37150, MexicoUniv Arizona, Dept Phys, Tucson, AZ 85721, USALucio, JL, Univ Guanajuato, Inst Fis, Lomas Bosque 103,Lomas Campestre, Guanajuato 37150, Mexico TI - omega ->rho pi transition and omega -> 3 pi decay AB - We evaluate the omega-->rho pi transition and the omega-->3 pi decay using a quark level linear sigma model (QL sigma M). We obtain g(omega rho pi)(QL sigma M)=(10.33-14.75) GeV-1 to be compared with other model dependent estimates averaging to g(omega rho pi) = 16 GeV-1. We show that in the QL sigma M a contact term is generated for the omega-->3 pi decay. Although the contact contribution by itself is small, the interference effects turn out to be important MH - Mexico|Guanajuato MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000085079600033 L2 - QCD SUM-RULES SO - Physical Review D 2000 ;6103(3): 1178 UI - 15147 AU - Luengo I AU - Olivares J AD - Univ Complutense, Fac Ciencias Matemat, E-28040 Madrid, SpainCtr Invest Matemat, Guanajuato 36000, MexicoLuengo, I, Univ Complutense, Fac Ciencias Matemat, E-28040 Madrid, Spain TI - Germs of holomorphic vector fields in C-m without a separatrix AB - We prove the existence of families of germs of holomorphic vector fields in C-m without a separatrix, in every complex dimension m bigger than or equal to 4 MH - Mexico|Guanajuato MH - Spain PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000089544700004 SO - Transactions of the American Mathematical Society 2000 ;352(12):5511-5524 1179 UI - 14638 AU - Luhrs CC AU - Beltran-Porter D AU - Sapina F AU - Fuertes A AD - Inst Ciencia Mat Barcelona, CSIC, Bellaterra 08193, SpainUniv Valencia, Inst Ciencia Mat, Valencia 46071, SpainUniv Guadalajara, Ctr Microscopia, Guadalajara 4420, Jalisco, MexicoFuertes, A, Inst Ciencia Mat Barcelona, CSIC, Campus UAB, Bellaterra 08193, Spain TI - Crystal chemistry and redox behaviour of antimony strontium calcium perovskites AB - The compound Sr2Sb1.4Ca0.6O6 and their reduced forms SP2Sb1.4Ca0.6O5.17 and Sr2Sb1.4Ca0.6O4.84 have been prepared and characterized by powder X-ray diffraction, electron diffraction, iodometric analyses and thermogravimetric analysis. The three phases with different oxygen stoichiometries are structurally related to the perovskite and show symmetry distortions from the ideal cubic structure (with cell parameter a(p)). The crystal structure of Sr2Sb1.4Ca0.6O6 may be refined by the Rietveld method from powder X-ray diffraction data using the space group P2(1)/n, and the cell parameters a=5.776(2), b=5.7837(2), c=8.1718(3) Angstrom, beta =90.039(3)degrees with the same structural model than for previously studied Sr2Bi1.4Ca0.6O6. It shows two crystallographically independent B positions with occupancies 100% Sb (site 1) and 40% Sb/60% Ca (site 2) ordered in a 3D NaCl-type arrangement. The reduced phases, Sr2Sb1.4Ca0.6O5.17 and Sr2Sb1.4Ca0.6O4.84, are obtained from Sr2Sb1.4Ca0.6O6 by treatment in Ar or Ar/H-2 at 650 degreesC and show respectively the unit cell parameters a approximate tob approximate to5.9 Angstrom, c approximate to8.4 Angstrom (with possible space groups I2/m or Immm), and a=8.4 Angstrom, b=6.0 Angstrom, c=24.2 Angstrom, beta =125 degrees (space group C2/c). The reduction process is reversible, and the initial oxidized phase can be obtained from the reduced ones by thermal treatment in oxygen or air, at temperatures close to 500 degreesC. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Jalisco MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1466-6049 UR - ISI:000165985400004 L2 - antimony perovskites;oxygen deficient perovskites;mixed valence antimony oxides;OXIDE SO - International Journal of Inorganic Materials 2000 ;2(6):483-492 1180 UI - 14791 AU - Luna-Guido ML AU - Beltran-Hernandez RI AU - Solis-Ceballos NA AU - Hernandez-Chavez N AU - Mercado-Garcia F AU - Catt JA AU - Olalde-Portugal V AU - Dendooven L AD - Inst Politecn Nacl, CINVESTAV, Dept Biotechnol & Bioengn, Lab Soil Ecol, Mexico City 07000, DF, MexicoComis Nacl Agua, Mexico City 07950, DF, MexicoAFRC, Inst Arable Crops Res, Dept Soil Sci, Harpenden AL5 2JQ, Herts, EnglandIPN, CINVESTAV, Dept Biochem & Biotechnol, Unidad Irapuato, Irapuato, Guanajuato, MexicoDendooven, L, Inst Politecn Nacl, CINVESTAV, Dept Biotechnol & Bioengn, Lab Soil Ecol, Av Politecn Nacl 2508,CP 07360,Apartado Postal 14, Mexico City 07000, DF, Mexico TI - Chemical and biological characteristics of alkaline saline soils from the former Lake Texcoco as affected by artificial drainage AB - Soils from the former Lake Texcoco are alkaline saline and were artificially drained and irrigated with sewage effluents since the late 1980s. Undrained soil and soil drained for 1, 5 and 8 years were sampled, characterized and incubated aerobically for 90 days at 22 +/- 1 degreesC while production of CO2, available P and concentrations of NH4+, NO2 and NO3- were monitored. Artificial drainage decreased pH(H2O), water holding capacity, organic C, total N, and Na+, K+, Mg2+, B, Cl- and SO42- concentrations, increased inorganic C and Ca2+ concentrations more than 5-fold while total P was not affected. Microbial biomass C decreased with increased length of drainage but bacteria, actinomycetes, denitrifiers and cellulose-utilizing bacteria tended to show opposite trends. CO2 production was less in soils drained greater than or equal to5 years compared to undrained soil but more than in soils drained for 1 year. Emission of NH3 was negligible and concentrations of NH4+ remained constant over time in each soil. Nitrification, as witnessed by increases in NO3- concentrations, occurred in soil drained for 8 years. NO2- concentrations decreased in soils drained less than or equal to1 year in the first 7 days of the incubation and remained constant thereafter. It was found that artificial drainage of soils from the former Lake Texcoco profoundly affected soil characteristics. Decreases in pH and Na+, (+), Cl- and SO42- concentrations made conditions more favourable for giant growth, although low concentrations of inorganic N and available P might be limiting factors MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Soil Science U5 - J;Article AV - English IS - 0178-2762 UR - ISI:000165619700003 L2 - alkaline saline soils;micro-organisms;characteristics;C and N mineralization;MINERALIZATION; PHOSPHORUS SO - Biology and Fertility of Soils 2000 ;32(2):102-108 1181 UI - 15551 AU - Luna RML AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoLuna, RML, Australian Natl Univ, John Curtin Sch Med Res, Div Cell Biol & Immunol, POB 334, Canberra, ACT 2601, Australia TI - First report of myxomatosis in Mexico AB - An outbreak of myxomatosis occurred between September and October 1993 on a rabbit farm in Punta Colnett (Ensenada, Baja California in northwestern Mexico, Trans-peninsular Highway, km 128) and was confirmed by the Mexico-USA Commission for Prevention of Foreign Diseases of Animals (CPA). This represents the first officially confirmed case of the disease in Mexico. Like the cases in California (USA), the brush rabbit (Sylvilagus bachmani) seems to be the carrier of the virus, since serum samples from wild rabbits from different areas of the peninsula of Baja California were found to contain antibodies against the myxoma virus MH - Australia MH - Mexico|Baja California PB - LAWRENCE: WILDLIFE DISEASE ASSN, INC RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0090-3558 UR - ISI:000088560500026 L2 - brush rabbits;domestic rabbits;geographical range extension;myxomatosis;Oryctolagus cuniculus;Sylvilagus bachmani SO - Journal of Wildlife Diseases 2000 ;36(3):580-583 1182 UI - 14994 AU - Luyo-Alvarado J AU - Santana-Aranda MA AU - Melendez-Lira M AU - Lopez-Lopez M AU - Mendez VH AU - Vidal MA AU - Yonezu H AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 7800, MexicoToyohashi Univ Technol, Dept Elect & Elect Engn, Toyohashi, Aichi 441, JapanLuyo-Alvarado, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 17-740, Mexico City 07000, DF, Mexico TI - Characterization of ZnSe films grown on GaAs substrates with InxGa1-xAs and AlxGa1-xAs buffer layers AB - In this work we present a study of ZnSe films grown on buffer layers of the ternary compounds InxGa1-xAs and Al1-xGaxAs by means of photoreflectance (PR), and photoluminescence (PL) spectroscopies and transmission electron microscopy (TEM). The buffer layers of the ternary compounds were grown by molecular beam epitaxy (MBE) employing concentrations with 0.01 < x < 0.3 and thickness of 5000 Angstrom. The films of ZnSe were grown by MBE in a separate II-VI system with a thickness of 6000 Angstrom. The measurements of PR allowed us to determine the energy value of the ZnSe band gap, the magnitude of the internal electric fields, and to evaluate the quality of the buffer layers and the ZnSe film. The intensity and width of the excitonic related peaks in the PL spectra and the presence of lines related with defects allowed us to assess the crystalline quality of the films. TEM results have a good correlation with the optical spectroscopies showing that the better samples are those grown on buffer layers of Al0.01Ga0.99As and In0.01Ga0.99As. (C) 2000 Elsevier Science S.A. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900010 L2 - ZnSe;interface;heterostructures;optical properties;OPTICAL-PROPERTIES; EPITAXIAL LAYERS; DEFECTS; HETEROSTRUCTURES SO - Thin Solid Films 2000 ;373(1-2):37-40 1183 UI - 16332 AU - Lyons J AU - Gutierrez-Hernandez A AU - az-Pardo E AU - Soto-Galera E AU - Medina-Nava M AU - Pineda-Lopez R AD - Wisconsin Dept Nat Resources, Monona, WI 53716, USAUniv Wisconsin, Zool Museum, Monona, WI 53716, USAInst Politecn Nacl, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoUniv Michoacana, Fac Biol, Lab Biol Acuat, Morelia, Michoacan, MexicoLyons, J, Wisconsin Dept Nat Resources, 1350 Femrite Dr, Monona, WI 53716 USA TI - Development of a preliminary index of biotic integrity (IBI) based on fish assemblages to assess ecosystem condition in the lakes of central Mexico AB - The lakes of central Mexico have great cultural, economic, and biological value, but they are being degraded at an accelerating rate. We employed historical data on fish communities from 19 of these lakes and case studies of community responses to environmental degradation from four of the best-studied, Xochimilco, Cuitzeo, Chapala, and Patzcuaro, to construct a preliminary index of biotic integrity (IBI). This IBI was designed to be an easily applied method for assessing lake ecosystem health and evaluating restoration efforts. The IBI had 10 metrics: number of total native species, number of common native species, number of native Goodeidae species, number of native Chirostoma species, number of native sensitive species, percent of biomass as tolerant species, percent of biomass as exotic species, percent of biomass as native carnivorous species, maximum standard length of native species, and percent of exotic invertebrate parasite species on or in native fishes. Initial applications of the index showed promise, accurately ranking the relative degradation of the four case-study lakes. Further tests of the index are warranted, and more data are needed to standardize sampling procedures, improve species classifications, and refine metric scoring criteria MH - USA MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000085998100006 L2 - Mexico;lake;fish;biotic integrity;IBI;ecosystem health;WEST-CENTRAL MEXICO; BIOLOGICAL INTEGRITY SO - Hydrobiologia 2000 ;418():57-72 1184 UI - 15628 AU - Machorro R AU - Samano EC AU - Soto G AU - Villa F AU - Cota-Araiza L AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoCtr Invest Opt, Leon, Gto, MexicoSamano, EC, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Modification of refractive index in silicon oxynitride films during deposition AB - Inhomogeneous thin films of SiOxNy have been deposited by laser ablation of a Si3N4 sintered target in an oxygen gas environment. The high oxidation rate of silicon nitride has been used to control the film stoichiometry by varying the oxygen partial pressure. The refractive index of the deposited material was able to be tailored at any value from 1.47 (SiO2) to 2.3 (Si3N4) by this approach. In situ optical characterization of the growing layer on the film was performed using kinetic and spectroscopic ellipsometry. The effective medium approximation (EMA) was used to determine the composition and refractive index by considering a mixture of SiO2. Si3N4 and voids. The volumetric composition obtained by ellipsometry was compared to the results determined by AES and XPS characterization. The goal of this application is to show that reactive PLD can be used to produce high quality optical filters. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000088275100011 L2 - SiOxNy thin films;PLD;laser ablation;ellipsometry;AES;optical filters;LASER-ABLATION; THIN-FILMS; TEMPERATURE; FILTERS SO - Materials Letters 2000 ;45(1):47-50 1185 UI - 15353 AU - Macias A AU - Lammerzahl C AU - Garcia A AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Konstanz, Fak Phys, D-78434 Constance, GermanyMacias, A, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - A class of colliding waves in metric-affine gravity, nonmetricity and torsion shock waves AB - By using our recent generalization of the colliding waves concept to metric-affine gravity theories, and also our generalization of the advanced and retarded time coordinate representation in terms of Jacobi functions, we find a general class of colliding wave solutions with fourth degree polynomials in metric-affine gravity. We show that our general approach contains the standard second degree polynomial colliding wave solutions as a particular case. (C) 2000 American Institute of Physics. [S0022-2488(00)01809-0] MH - Germany MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000088944400033 L2 - GRAVITATIONAL PLANE-WAVES; GAUGE-THEORY; NONCOLLINEAR POLARIZATION; SPACE-TIMES; COMPUTER SO - Journal of Mathematical Physics 2000 ;41(9):6369-6380 1186 UI - 15560 AU - Macias JL AU - Espindola JM AU - Garcia-Palomo A AU - Scott KM AU - Hughes S AU - Mora JC AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCascades Volcano Observ, Vancouver, WA 98661, USASUNY Buffalo, Dept Geol, Buffalo, NY 14260, USAUniv Florence, Dipartimento Sci Terra, I-50121 Florence, ItalyMacias, JL, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Late Holocene Pelean-style eruption at Tacana volcano, Mexico and Guatemala: Past, present, and future hazards AB - Tacana volcano, located on the border between Mexico and Guatemala, marks the northern extent of the Central American volcanic chain. Composed of three volcanic structures, it is a volcanic complex that has had periodic explosive eruptions for at least the past 40 k.y. The mast recent major eruption occurred at the San Antonio volcano, the youngest volcanic edifice forming the complex, about 1950 yr ago. The Pelean style eruption, issued from the southwest part of the dome, and swept a 30 degrees sector with a hot block and ash now that traveled about 14 km along the Cahoacan ravine. Deposits from this event are well exposed around the town of Mixcun and were therefore given the name of that town, the Mixcun pow deposit. The Mixcun flow deposit is, in the channel facies, alight gray, massive, thick (>10 m), matrix-supported unit with dispersed lithic clasts of gravel to boulder size, divisible in some sections into a variable number of flow units. The overbank facies is represented by a thin (<1 m), massive, matrix-supported unit, In both of these facies the deposit has disseminated charcoal, fumarolic pipes, and juvenile lithics with cooling joints, The Mixcun flow deposit contains clasts of (1) light gray, dense andesite, (2) dark gray, glassy and banded andesite, and (3) minor altered red andesite from the edifice, set in a matrix of sand and silt. The Mixcun flow deposit covers an area of at least 25 km(2) and has a minimum estimated volume of 0.12 km(3). Basaltic-andesite inclusions (54% SiO2) and various signs of disequilibrium in the mineral assemblage of the two-pyroxene andesitic products (60%-63% SiO2) suggest that magma mixing may have triggered the eruption. Following deposition of the Mixcun flow deposit andesitic to dacitic (62%-64% SiO2) lava flows were extruded and a dacitic dome (64.4% SiO2) at the San Antonio summit formed. Syneruptive and posteruptive lahars flooded the main drainages of the Cahoacan and Izapa-Mixcun valleys in the area of the present city of Tapachula (population 250 000) and the pre-Hispanic center of Izapa. Three radiocarbon ages date this event between A.D. 25 and 72 (range +/-1 sigma, 38 B.C-A.D. 216), which correlates with a halt in construction at Izapa (Hato phase of ca. 50 B.C.-A.D. 100), probably due to temporary abandonment of the city caused by lahars. Another similar event would produce extensive damage to the towns (papulation of about 68 000 people) now built upon the Mixcun flow deposit, The main summit of Tacana volcano continues to show signs of fumarolic activity; the most recent period of activity in 1985-1986 culminated in a minor phreatic explosion MH - Italy MH - Mexico|Distrito Federal MH - USA PB - COLLEGE STN: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000088466200006 L2 - archaeology;Chiapas Mexico;magma;mixing;Pelean-type eruption;SOUFRIERE HILLS VOLCANO; NUEE-ARDENTE DEPOSITS; MAGMATIC INCLUSIONS; FLOW DEPOSITS; STRATIGRAPHY; MONTSERRAT; BASALTS; CHIAPAS; ROCKS; FIELD SO - Geological Society of America Bulletin 2000 ;112(8):1234-1249 1187 UI - 15614 AU - Macias S AU - Oversteegen LG AU - Widener MP AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Alabama, Dept Math, Birmingham, AL 35294, USAOversteegen, LG, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Cd Univ, Mexico City 04510, DF, Mexico TI - Confluent images of the hairy arc AB - We introduce a class of smooth dendroids (called weak hairy arcs) which generalizes the hairy are, and show that the confluent images of the hairy are are contained in this class. We show that for confluent maps of the hairy are, the properties of being open, light, and finite-to-one are equivalent. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000088200600002 L2 - hairy arc;weak hairy arc;confluent map;open map;light map SO - Topology and Its Applications 2000 ;105(3):261-283 1188 UI - 15210 AU - Mackie AD AU - Hernandez-Cobos J AU - Vega LF AD - ETSEQ Univ Rovira & Virgili, Dept Enginyeria, Tarragona, SpainUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoMackie, AD, ETSEQ Univ Rovira & Virgili, Dept Enginyeria, Tarragona, Spain TI - Predicting liquid-vapour equilibria for water using an ab-initio potential from histogram reweighting Monte Carlo simulations AB - The coexisting densities for an ab-initio model for water have been calculated using grand canonical Monte Carlo simulations with the histogram reweighting technique. Although good agreement with experimental data is found for the radial distribution function at room temperature, the predicted critical density and temperature are well below both the experimental value as well as predictions from semi-empirical potentials. Improvement in the repulsive part of the nb-initio potential is suggested as a way to obtain better agreement with experiment MH - Mexico|Morelos MH - Spain PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0892-7022 UR - ISI:000089409100005 L2 - vapour liquid equilibria;water;histogram reweighting;NONADDITIVITY; 25-DEGREES-C SO - Molecular Simulation 2000 ;24(1-3):63-69 1189 UI - 15539 AU - Mackie EB AU - Galvan DH AU - Migone AD AD - So Illinois Univ, Dept Phys, Carbondale, IL 62901, USAUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Methane adsorption on planar WS2 and on WS2-fullerene and -nanotube containing samples AB - Adsorption-desorption cycles were measured for methane on non-irradiated WS2, and on irradiated WS2 (which contained, in part, WS2 fullerenes and nanotubes). Both types of samples were further subdivided into three sets: one set received no further treatment, another set was heated under vacuum, and the last set was acid-treated and heated. The specific surface area was determined for each set; so was the presence or absence of a hysteresis loop in the adsorption-desorption cycles. The results of these two groups of measurements were correlated with the space available for adsorption. The implications of the results for the experimental determination of the dimensionality of gas adsorbed at the interior of nanotubes are discussed MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0929-5607 UR - ISI:000088638300006 L2 - adsorption;WS2;nanotubes and fullerenes;CARBON NANOTUBES; NITRIDE SO - Adsorption-Journal of the International Adsorption Society 2000 ;6(2):169-174 1190 UI - 16219 AU - Mackie EB AU - Galvan DH AU - Adem E AU - Talapatra S AU - Yang GL AU - Migone AD AD - So Illinois Univ, Dept Phys, Carbondale, IL 62901, USAUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Calif Berkeley, Dept Cell & Mol Biol, Berkeley, CA 94720, USAUNAM, Inst Fis, Mexico City, DF, MexicoMigone, AD, So Illinois Univ, Dept Phys, Carbondale, IL 62901, USA TI - Production of WS2 nanotubes by an activation method AB - Tungsten sulfide nanotubes have been prepared at low temperature-the preparation of such closed fullerene-like structures normally requires very high temperatures. Acid treatment, heating under vacuum to 100 degrees C, and sonication were used to produce the tubes, which were examined using transmission electron microscopy (see Figure) and atomic force microscopy MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0935-9648 UR - ISI:000086444600007 L2 - FULLERENE-LIKE STRUCTURES; IRRADIATION; CARBON SO - Advanced Materials 2000 ;12(7):495-+ 1191 UI - 14710 AU - Madrigal H AU - Sanchez-Villegas A AU - Martinez-Gonzalez MA AU - Kearney J AU - Gibney MJ AU - de Irala J AU - Martinez JA AD - Univ Navarra, Dept Fisiol & Nutr, Pamplona 31008, SpainInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Navarra, Dept Epidemiol & Salud Publ, E-31080 Pamplona, SpainTrinity Coll, Inst European Food Studies, Dublin, IrelandMartinez, JA, Univ Navarra, Dept Fisiol & Nutr, Irunlarrea S-N, Pamplona 31008, Spain TI - Underestimation of body mass index through perceived body image as compared to self-reported body mass index in the European Union AB - An observational, cross-sectional study was conducted in a representative sample of the European Union (7155 men and 8077 women) to calculate the underestimation of body weight as assessed by body image among the overweight and obese population and identify the associated factors to this behavior. Participants were older than 15 years and they were living in the 15 European Union countries. Body mass index (BMI) was grouped into 4 categories using the cutpoints established by the WHO, while perceived body image (PBI) was assessed using a nine-silhouettes drawing. The degree of underestimation between PBI as compared to BMI was identified in overweight and obesity categories of BMI. A multivariable logistic regression model for each gender was used to adjust for potentially confounding variables. Men classified themselves worse than women, being more likely to underestimate their body weight (65.2% of men underestimated their weight vs 32.2% women), regardless of other socioeconomic and attitudinal variables. The greatest degree of underestimation was observed in Mediterranean individuals (68.7% of men and 37.9% of women underestimated their weight). The subjects in the 'maintenance' stage of physical activity tended more often to wrongly select their actual image (71.8% for men and 38.7% for women) MH - Ireland MH - Mexico|Distrito Federal MH - Spain PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 15 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0033-3506 UR - ISI:000165831700010 L2 - anorexia;bulimia;body mass index;perceived body image;obesity;EATING DISORDERS; SEX-DIFFERENCES; RISK-FACTORS; WEIGHT; WOMEN; OBESITY; ATTITUDES; EXERCISE; FAT SO - Public Health 2000 ;114(6):468-473 1192 UI - 14362 AU - Madrigal M AU - Quintana VH AD - Inst Tecnol Morelia, Morelia, Michoacan, MexicoMadrigal, M, Univ Waterloo, Waterloo, ON N2L 3G1, Canada TI - A security-constrained energy and spinning reserve markets clearing system using an interior-point method AB - A model and solution approach to a daily energy and spinning-reserve electricity markets clearing system is presented in this paper. The model considers offers for energy supply and spinning reserve, bids for demand of energy and re-schedulable bilateral contracts. System security is taken into account by using a direct-current model. The model represents the clearing system used by an ISO in charge of both the market and system security. The clearing system is formulated as an optimization problem which is solved using an Interior-Point Method (IPM), taking advantage of the problem's special structure MH - Canada MH - Mexico|Michoacan PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000166738400034 L2 - bilateral contracts;interior-point methods;market clearing;spot markets;ECONOMIC-DISPATCH; POWER-SYSTEMS SO - Ieee Transactions on Power Systems 2000 ;15(4):1410-1416 1193 UI - 15120 AU - Madrigal M AU - Quintana VH AD - Univ Waterloo, Waterloo, ON N2L 3G1, CanadaInst Technol Morelia, Morelia, Michoacan, MexicoUniv Waterloo, Waterloo, ON N2L 3G1, CanadaMadrigal, M, Univ Waterloo, Waterloo, ON N2L 3G1, Canada TI - An interior-point/cutting-plane method to solve unit commitment problems AB - An interior-point/cutting-plane method for nondifferentiable optimization is used to solve the dual to a unit commitment problem, The interior-point/cutting-plane method has two advantages over previous approaches, such as the sub-gradient and bundle methods: first, it has better convergence characteristics; and second, does not suffer from the parameter-tunning drawback. The results of a performance testing using systems with up to 104 units confirm the superiority of the interior-point /cutting-plane method over previous approaches MH - Canada MH - Mexico|Michoacan PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000089667600018 L2 - interior-point methods;Lagrangian relaxation;nondifferentiable optimization;unit commitment;LAGRANGIAN-RELAXATION; OPTIMIZATION; ALGORITHMS; SYSTEMS SO - Ieee Transactions on Power Systems 2000 ;15(3):1022-1027 1194 UI - 16108 AU - Maeda S AU - Kosuge K AU - Gonzalez D AU - De Luna E AU - Akiyama H AD - Museum Nat & Human Act, Sanda, Hyogo 6691546, JapanKobe Univ, Fac Sci, Dept Biol, Nada Ku, Kobe, Hyogo 6578501, JapanUNAM, Inst Ecol, Xalapa 91000, Veracruz, MexicoAkiyama, H, Museum Nat & Human Act, 6 Chome, Sanda, Hyogo 6691546, Japan TI - Molecular phylogeny of the suborder leucodontineae (Musci; Leucodontales) inferred from rbcL sequence data AB - The phylogeny of the Leucodontaceae and its allies (pleurocarpous Diplolepidae) was inferred from chloroplast-coded rbcL sequence data (1324 bp on average). Our analyses indicate (1) that Antitrichia is distantly related to the other members of Leucodontaceae and should be excluded from the family, (2) that Cryphaeaceae form a monophyletic clade, not with Anomodontaceae and Leptodontaceae, but with Leucodontaceae, refuting the placement of Leucodontaceae and Cryphaeaceae in different superfamilies, (3) that Forsstroemia, variously classified in Leucodontaceae, Cryphaeaceae or Leptodontaceae, forms a monophyletic clade with Neckera (Neckeraceae), and (4) that the presumed monophyly of Anomodon and that of Anomodontaceae are not supported MH - Japan MH - Mexico|Veracruz PB - TOKYO: BOTANICAL SOC JAPAN RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0918-9440 UR - ISI:000086695400004 L2 - Anomodontaceae;Cryphaeaceae;Leucodontaceae;Leucodontineae;molecular phylogeny;rbcL;RIBOSOMAL-RNA GENES; HOMOPLASY EXCESS; BRYOPHYTES; CHLOROPLAST; CIRCUMSCRIPTION; MOSSES; INDEX SO - Journal of Plant Research 2000 ;113(1109):29-38 1195 UI - 14520 AU - Magnusson V AU - Lindqvist AKB AU - Castillejo-Lopez C AU - Kristjansdottir H AU - Steinsson K AU - Grondal G AU - Sturfelt G AU - Truedsson L AU - Svenungsson E AU - Lundberg I AU - Gunnarsson I AU - Bolstad AI AU - Haga HJ AU - Jonsson R AU - Klareskog L AU - cocer-Varela J AU - arcon-Segovia D AU - Terwilliger JD AU - Gyllensten UB AU - arcon-Riquelme ME AD - Univ Uppsala, Dept Genet & Pathol, Unit Med Genet, Rudbeck Labs, S-75185 Uppsala, SwedenUniv Uppsala, Uppsala Genotyping Ctr, S-75185 Uppsala, SwedenLandspitalinn Univ Hosp, Dept Rheumatol, Reykjavik, IcelandLandspitalinn Univ Hosp, Ctr Rheumatol Res, Reykjavik, IcelandUniv Lund Hosp, Dept Rheumatol, S-22185 Lund, SwedenUniv Lund Hosp, Dept Clin Microbiol, S-22185 Lund, SwedenKarolinska Hosp, Rheumatol Unit, Karolinska, SwedenHaukeland Univ Hosp, Inst Med, Broegelmann Res Lab, N-5021 Bergen, NorwayHaukeland Univ Hosp, Inst Med, Ctr Med Genet & Mol Med, N-5021 Bergen, NorwayHaukeland Univ Hosp, Inst Med, Rheumatol Sect, N-5021 Bergen, NorwayInst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoColumbia Univ, Dept Psychiat, New York, NY, USAColumbia Univ, Columbia Genome Ctr, New York, NY, USAAlarcon-Riquelme, ME, Univ Uppsala, Dept Genet & Pathol, Unit Med Genet, Rudbeck Labs, Dag Hammarskjolds Vag 20, S-75185 Uppsala, Sweden TI - Fine mapping of the SLEB2 locus involved in susceptibility to systemic lupus erythematosus AB - We have previously reported linkage of systemic lupus erythematosus to chromosome 2q37 in multicase families from Iceland and Sweden. This locus (SLEB2) was identified by linkage to the markers D2S125 and D2S140, In the present study we have analyzed additional microsatellite markers and SNPs covering a region of 30 cM around D2S125 in an extended set of Nordic families (Icelandic, Swedish, and Norwegian). Two-point linkage analysis in these families gave a maximum lod score at the position of markers D2S2585 and D2S2985 (Z = 4.51, PIC = 0.65), by applying a "model-free" pseudo-marker linkage analysis. Based on multipoint linkage analysis in the Nordic families, the most likely location of the SLEB2 locus is estimated to be in the interval between D2S125 and the position of markers D2S2585 and D2S2985, with a peak multipoint lod score of Z = 6.03, assuming a dominant pseudo-marker model. Linkage disequilibrium (LD) analysis was performed using the data from the multicase families and 89 single-case families of Swedish origin, using the same set of markers. The LD analysis showed evidence for association in the single-case and multicase families with locus GAAT3C11 (P < 0.0003), and weak evidence for association was obtained for several markers located telomeric to D2S125 in the multicase families. Thirteen Mexican families were analyzed separately and found not to have linkage to this region. Our results support the presence of the SLEB2 locus at 2q37. (C) 2000 Academic Press MH - Iceland MH - Mexico|Distrito Federal MH - Norway MH - Sweden MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 34 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0888-7543 UR - ISI:000166362000005 L2 - X NZW)F-1 MICE; HUMAN GENOME; LINKAGE DISEQUILIBRIUM; GENETIC-ANALYSIS; DISEASE; TRINUCLEOTIDE; POPULATION; FAMILIES; MARKERS; TWIN SO - Genomics 2000 ;70(3):307-314 1196 UI - 15053 AU - Magurran AE AU - Garcia M AD - Univ St Andrews, St Andrews KY16 9TS, Fife, ScotlandUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoMagurran, AE, Univ St Andrews, Bute Bldg, St Andrews KY16 9TS, Fife, Scotland TI - Sex differences in behaviour as an indirect consequence of mating system AB - A considerable literature has been devoted to documenting differences between the sexes. However, relatively little attention has hitherto been directed towards those differences that arise as an indirect consequence of mating system even though they can have profound implications for the daily lives of the animals involved. In this review we focus on differences in the non-reproductive behaviour of fish and relate these to sexual dimorphism in size and morphology, and to variance in fitness between the sexes. In line with our expectation, differences in distributional ecology, schooling, aggression, predator avoidance and foraging are exaggerated in sexually dimorphic species and polygamous mating systems. Nonetheless, the behaviour of males and females may also differ in sexually monomorphic and monogamous species. We conclude by highlighting promising directions for further research. (C) 2000 The Fisheries Society of the British Isles MH - Mexico|Distrito Federal MH - United Kingdom PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 20 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Review AV - English IS - 0022-1112 UR - ISI:000089877200001 L2 - sexual dimorphism;polygamy;reproductive success;predator avoidance;foraging;GUPPY POECILIA-RETICULATA; LIFE-HISTORIES; FORAGING INNOVATION; TRINIDADIAN GUPPIES; SELECTIVE PREDATION; SCHOOLING BEHAVIOR; BLUEGILL SUNFISH; SIZE DIMORPHISM; VIVIPAROUS FISH; FEMALE MIMICRY SO - Journal of Fish Biology 2000 ;57(4):839-857 1197 UI - 14851 AU - Maier RM AU - Soberon-Chavez G AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca, Morelos 62250, MexicoUniv Arizona, Dept Soil & Water Sci, Tucson, AZ 85721, USASoberon-Chavez, G, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Pseudomonas aeruginosa rhamnolipids: biosynthesis and potential applications AB - Pseudomonas aeruginosa produces and secretes rhamnose-containing glycolipid biosurfactants called rhamnolipids. This review describes rhamnolipid biosynthesis and potential industrial and environmental applications of rhamnolipids. Rhamnolipid production is dependent on central metabolic pathways, such as fatty acid synthesis and dTDP-activated sugars, as well as on enzymes participating in the production of the exopolysaccharide alginate. Synthesis of these surfactants is regulated by a very complex genetic regulatory system that also controls different P. aeruginosa virulence-associated traits. Rhamnolipids have several potential industrial and environmental applications including the production of fine chemicals, the characterization of surfaces and surface coatings, as additives for environmental remediation, and as a biological control agent. Realization of this wide variety of applications requires economical commercial-scale production of rhamnolipids MH - Mexico|Morelos MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 79 U4 - Biotechnology & Applied Microbiology U5 - J;Review AV - English IS - 0175-7598 UR - ISI:000165431500003 L2 - POLYCYCLIC AROMATIC-HYDROCARBONS; BIOSURFACTANT SYNTHESIS; HEAVY-METALS; TRANSCRIPTIONAL ACTIVATOR; LIPOPOLYSACCHARIDE CORE; RESIDUAL HYDROCARBON; MICROBIAL-PRODUCTION; UG2 BIOSURFACTANTS; ENHANCED REMOVAL; DEFICIENT MUTANT SO - Applied Microbiology and Biotechnology 2000 ;54(5):625-633 1198 UI - 14953 AU - Maitra A AU - Krueger JE AU - Tascilar M AU - Offerhaus GJA AU - ngeles-Angeles A AU - Klimstra DS AU - Hruban RH AU - bores-Saavedra J AD - Univ Texas, SW Med Ctr, Dept Pathol, Dallas, TX 75235, USAInst Nacl Nutr Salvador Zubiran, Tlalpan, MexicoUniv Amsterdam, Acad Med Ctr, NL-1105 AZ Amsterdam, NetherlandsMem Sloan Kettering Canc Ctr, New York, NY 10021, USAJohns Hopkins Med Inst, Baltimore, MD 21205, USAAlbores-Saavedra, J, Univ Texas, SW Med Ctr, Dept Pathol, 5323 Harry Hines Blvd, Dallas, TX 75235 USA TI - Carcinoid tumors of the extrahepatic bile ducts - A study of seven cases AB - The authors report seven patients with carcinoid tumors of the extrahepatic bile ducts (EHBDs), All patients were women, with an average age at diagnosis of 49.8 years (range, 37-67 yrs), The most common presenting symptom was painless jaundice with or without pruritus. Although one patient had peptic ulcer disease before the onset of obstructive jaundice, none had systemic endocrine manifestations, These neoplasms were most often located in the common bile duct. Grossly, the carcinoid tumors were usually nodular and poorly demarcated, and ranged from 1.1 to 2.7 cm in size. Only one of the neoplasms was polypoid, Microscopically, the tumors had a trabecular or nesting pattern with occasional tubule formation, and were composed of relatively small cells with granular chromatin. All of the neoplasms expressed chromogranin and two expressed synaptophysin. Three expressed serotonin and two of the three were also immunoreactive for pancreatic polypeptide or somatostatin. Two tumors were focally positive for gastrin and one of these two tumors was also positive for serotonin and pancreatic polypeptide. All seven carcinoid tumors showed no immunoreactivity for p53, and assays for p53 loss of heterozygosity analysis were negative in two, suggesting that p53 mutations do not play a role in the pathogenesis of EHBD carcinoids. A mutation in codon 12 of K-ras was found in one carcinoid tumor whereas two of two showed immunoreactivity for Dpc4 protein. In view of the small number of carcinoids studied, the importance of these findings in the pathogenesis of these tumors is unclear. Ultrastructural examination of three of the tumors revealed numerous membrane-bound, round neurosecretory granules. Clinically, these lesions had an indolent course. Even in the presence of lymph node metastases (noted in two patients), all of the patients remained disease free 2 to 11 years (average follow up, 6.6 yrs) after segmental resection or pancreaticoduodenectomy (Whipple's procedure). Because carcinoid tumors of the EHBD are of low malignant potential, they should be separated from the more common adenocarcinomas in this location MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 17 U4 - Pathology;Surgery U5 - J;Article AV - English IS - 0147-5185 UR - ISI:000165136500005 L2 - carcinoid tumors;extrahepatic bile ducts;immunohistochemistry;electron microscopy;p53;k-ras genes;RAS CODON-12 MUTATIONS; BILIARY-TRACT TUMORS; CYSTIC DUCT; GENE; EXPRESSION; NEOPLASMS; LIVER; LUNG; P53 SO - American Journal of Surgical Pathology 2000 ;24(11):1501-1510 1199 UI - 16621 AU - Maksymowych WP AU - Tao S AU - Vaile J AU - Suarez-Almazor M AU - Ramos-Remus C AU - Russell AS AD - Univ Alberta, Dept Med, Heritage Med Res Ctr 562, Edmonton, AB T6G 2S2, CanadaUniv Alberta, Dept Publ Hlth Sci, Edmonton, AB, CanadaHosp Especialidades, IMSS, Dept Rheumatol, Guadalajara, Jalisco, MexicoMaksymowych, WP, Univ Alberta, Dept Med, Heritage Med Res Ctr 562, Edmonton, AB T6G 2S2, Canada TI - LMP2 polymorphism is associated with extraspinal disease in HLA-B27 negative Caucasian and Mexican Mestizo patients with ankylosing spondylitis AB - Objective. To determine the effects of HLA Class II genes, particularly LMP2 and previously implicated Class I genes, on susceptibility and disease expression in HLA-B27 negative ankylosing spondylitis (AS). Methods, Patients included 41 HLA-B27 negative Caucasians from a total AS population of 546 and 17 HLA-B27 negative Mexican Mestizo. Controls included 4352 random HLA-B27 negative Caucasians. LMP2 genotype assignments were made on all patients and 282 random Caucasian controls by polymerase chain reaction-restriction fragment length polymorphism with the Cfo I restriction enzyme while HLA typing was performed on patients and controls using microcytotoxicity assays for Class I, and sequence specific probe-PCR for HLA-B60, B39, B38, and DR. Results, The LMP2BB genotype was significantly decreased in Caucasian AS patients without extraspinal (ES) disease (25%) compared to AS patients with ES (64.7%) (p = 0.01) and random Caucasian controls (53.9%) (p = 0.007), even when those with colitis and psoriasis were excluded from analysis (ES + 55.6% versus ES - 22.2%). This finding remained significant after stratification by HLA-DR. Similar trends were noted in the Mexican population. A potential role for HLA-DR8 and DR2 in susceptibility to disease was observed in Caucasian patients, although this observation requires confirmation. We could nor confirm reported associations with HLA-B60 or B39. Peripheral arthritis was significantly more commonly observed in those who had had acute anterior uveitis (AAU) (75%) than in those who had not developed AAU (27.3%) (p = 0.04). Conclusion. HLA Class II encoded genes may have effects on disease susceptibility and/or phenotype in HLA-B27 negative individuals similar to those noted in HLA-B27 positive AS. Eccentric and axial phenotypes of disease may be immunogenetically determined MH - Canada MH - Mexico|Jalisco PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 21 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000084778000031 L2 - HLA-B27 negative;ankylosing spondylitis;LMP2 polymorphism;MAJOR HISTOCOMPATIBILITY COMPLEX; ACUTE ANTERIOR UVEITIS; HLA-ANTIGENS; CLASS-II; LINKAGE DISEQUILIBRIUM; SUSCEPTIBILITY; ARTHRITIS; GENES; MHC; SPONDYLOARTHROPATHIES SO - Journal of Rheumatology 2000 ;27(1):183-189 1200 UI - 15111 AU - Malacara-Doblado D AU - Dorrio BV AD - Ctr Invest Opt AC, Guanajuato 37000, MexicoUniv Vigo, Dept Fis Aplicada, E-36200 Vigo, Galicia, SpainMalacara-Doblado, D, Ctr Invest Opt AC, Apartado Postal 1-948, Guanajuato 37000, Mexico TI - Family of detuning-insensitive phase-shifting algorithms AB - The design of phase-shifting algorithms (PSA's) has been carried out with diverse strategies by different authors. A generalized algebraic approach is employed to obtain a family of detuning-insensitive PSA's; their behavior against a Linear phase error is analyzed from a geometric point of view. The obtained results are compared with the conditions provided by the Fourier representation of the corresponding sampling reference functions. In our case, new equations as criteria for determining whether a PSA is detuning insensitive, new analytic expressions for the phase error, and new algorithms with interesting properties are achieved. (C) 2000 Optical Society of America [S0740-3232(00)00410-5] OCIS codes: 050.5080, 070.2590, 100.2650, 120.5050 MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000089604400018 L2 - MEASURING INTERFEROMETRY; ERROR SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(10):1857-1863 1201 UI - 16680 AU - Malacara-Doblado D AU - Dorrio BV AU - Malacara-Hernandez D AD - Ctr Invest Opt AC, Leon Gto 37000, MexicoUniv Vigo, Dept Fis Aplicada, Vigo, Galicia, SpainMalacara-Doblado, D, Ctr Invest Opt AC, Apdo Postal 1-948, Leon Gto 37000, Mexico TI - Graphic tool to produce tailored symmetrical phase-shifting algorithms AB - We employ the Fourier-transform graphic representation of a set of antisymmetrical and symmetrical sampling reference harmonics to obtain new symmetrical phase-shifting algorithms tailored to specific characteristics. As an example, a new detuning-insensitive seven-point algorithm, with a third signal harmonic insensitivity and which is detuning insensitive at this frequency, is derived. (C) 2000 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000084487900022 L2 - INTERFEROMETRY SO - Optics Letters 2000 ;25(1):64-66 1202 UI - 15004 AU - Malagnini ML AU - Morossi C AU - Buzzoni A AU - Chavez M AD - Univ Trieste, Dipartimento Astron, I-34131 Trieste, ItalyObserv Roque Muchachos, Telescopio Nazl Galileo, Santa Cruz De La Palma 38700, Canary Islands, SpainOsservatorio Astron Trieste, I-34131 Trieste, ItalyOsservatorio Astron Brera, I-23807 Merate, Lc, ItalyInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoMalagnini, ML, Univ Trieste, Dipartimento Astron, Via GB Tiepolo 11, I-34131 Trieste, Italy TI - Observations and atmospheric parameters of super-metal-rich candidates AB - The spectroscopic properties of a sample of 92 Population I bright stars (V < 8) with literature values of [Fe/H] +0.1 are reviewed in order to study the metallicity scale at supersolar regimes. For 73 of these candidate super-metal-rich (SMR) stars we identified the photospheric fiducial parameters (T-eff, log g, [M/H]) from among published parameter sets via a comparison of new observations in the wavelength range 5034-5398 Angstrom with synthetic spectra derived from the 1997 database of Chavez et al. As a main issue in our analysis, we find that a "genuine" SMR stellar component in the Galactic disk exists with more than one-fourth of the stars in our sample fulfilling the criterion [Fe/H] greater than or equal to 0.2 dex, and three of them as rich as [Fe/H] > +0.4 dex MH - Italy MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6280 UR - ISI:000090058700008 L2 - OLD STELLAR POPULATIONS; FE ABSORPTION INDEXES; BAADES-WINDOW; ARCHIVAL DATA; GIANT STARS; COOL DWARFS; K-GIANTS; CHEMICAL EVOLUTION; MODEL ATMOSPHERES; SYNTHETIC SPECTRA SO - Publications of the Astronomical Society of the Pacific 2000 ;112(777):1455-1466 1203 UI - 14829 AU - Maldonado F AU - Ciurlizza A AU - Radillo R AU - de Leon EP AD - Inst Politecn Nacl ES, Mexico City 07500, DF, MexicoInst Cibernet Matemat & Fis, Havana, CubaMaldonado, F, Inst Politecn Nacl ES, Mexico City 07500, DF, Mexico TI - Optimisation of the colour sequence in the dyeing process: industrial applications AB - In this paper we report, for realistic industrial work conditions, the applicability of the optimisation model developed to obtain the best colour sequence in the process of fabric dyeing. We have resolved the problem of ordering a long series of colours using a personal computer, to establish an optimum order. This takes into account the perceptual response of the human eye. The sequence begins with one specific colour, returning, under certain conditions, from dark to light colours. The algorithm we developed considerably reduces the number of determinations that must be carried out within a colorimeter MH - Cuba MH - Mexico|Distrito Federal PB - BRADFORD: SOC DYERS COLOURISTS RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Applied;Engineering, Chemical;Materials Science, Textiles U5 - J;Article AV - English IS - 0037-9859 UR - ISI:000165414500007 SO - Journal of the Society of Dyers and Colourists 2000 ;116(11):359-362 1204 UI - 16678 AU - Malischewsky PG AD - Univ Jena, Inst Geosci, D-07749 Jena, GermanyMalischewsky, PG, Univ Nacl Autonoma Mexico, Inst Invest Math Aplicadas & Sist, Apdo Postal 20-726, Mexico City 0100, DF, Mexico TI - Comment to "A new formula for the velocity of Rayleigh waves" by D. Nkemzi [Wave Motion 26 (1997) 199-205] AB - A new formula for the phase velocity of Rayleigh waves for all Poisson values by Nkemzi [Wave Motion 26 (1997) 199-205] is discussed and commented. By applying Cardan's formula and using the advantages of MATHEMATICA the author succeeds in extracting a formula which is also valid in the whole range of Poisson ratios and is, contrary to Nkemzi, as well correct as probably the simplest representation of the relevant real root of Rayleigh's equation. Additionally, a similar formula is presented for the complex roots. In this connection, for the first time an analytic expression of the critical Poisson ratio, which limits the range of complex roots, is derived. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Acoustics;Mechanics;Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0165-2125 UR - ISI:000084468900006 SO - Wave Motion 2000 ;31(1):93-96 1205 UI - 15014 AU - Malo BM AU - Salazar L AU - Sokolowski S AU - Pizio O AD - UNAM, Inst Fis, Mexico City 04511, DF, MexicoUniv Autonoma Estado Mexico, Fac Ciencias, Toluca, MexicoMarie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandMalo, BM, UNAM, Inst Fis, Mexico City 04511, DF, Mexico TI - Application of the density functional method to study adsorption and phase transitions in two-site associating, Lennard-Jones fluids in cylindrical pores AB - A density functional approach is applied to study the adsorption of an associating model fluid in narrow cylindrical capillaries. The model with non-associative Lennard-Jones (LJ), attraction between fluid particles and the site-site association, permitting the formation of chains of LJ monomers, i.e. the two-site model for monomers, is investigated. The strength of associative interactions is varied in the model to obtain an insight into the role of the associative interactions on the phase diagrams of confined fluids. The fluid-pore walls interaction is chosen in the form of the Yukawa-type potential. The wetting properties of the confining solid surface is studied first. Next, we describe the first-order layering transitions in cylindrical pores and the phenomenon of capillary condensation in capillaries of molecular dimensions. We also analysed the structural changes in the adsorbed fluids accompanying layering transitions and capillary condensation. A comparison of the phase diagrams for the fluid in the cylindrical pores with two different radii and in the slit-like pores, with the same nominal width as the cylindrical pores, is performed. We have also compared the capillary evaporation phase diagram for the model in question in cylindrical and slit-like pores. The method and the results represent a useful basis for the development of inhomogeneous statistical associating fluid theory for several practical applications MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000090091100005 L2 - DIRECTIONAL ATTRACTIVE FORCES; 4 BONDING SITES; THERMODYNAMIC PERTURBATION-THEORY; MONTE-CARLO SIMULATIONS; SLIT-LIKE PORES; HARD-WALL; CAPILLARY CONDENSATION; SOLID-SURFACES; EQUATION; EQUILIBRIA SO - Journal of Physics-Condensed Matter 2000 ;12(41):8785-8800 1206 UI - 15402 AU - Malo BM AU - Huerta A AU - Pizio O AU - Sokolowski S AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUNAM, Inst Fis, Mexico City 04511, DF, MexicoMarie Curie Sklodowska Univ, Dept Modelling Phys Chem Proc, PL-20031 Lublin, PolandPizio, O, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Phase behavior of associating two- and four-bonding sites Lennard-Jones fluid in contact with solid surfaces AB - We have studied the adsorption of associating fluids on solid substrates, in the framework of the models with two and four bonding sites and with nonassociative Lennard-Jones (LJ) attraction between fluid particles. The fluid-substrate interaction is chosen in the form of the 9-3 LJ-type potential. Our analysis involves the strongly adsorbing, graphitelike substrate, as well as several weaker model surfaces. Special attention is paid to the layering transitions, their relevance to the prewetting transition, and the prewetting transition on its own. We have evaluated the surface critical temperature and made estimates for the critical temperatures of the layering transitions and of the wetting temperature, for each model in question. An insight into thermodynamic behavior of the models is given in terms of the phase diagrams. Our calculations reveal that the details of the surface phase behavior of strongly associating fluids differ from the phase behavior for weakly associating fluids and of; adsorbed, simple nonassociating fluid. Also, we have analyzed structural changes in the adsorbed films during transitions in question, considering the entire distribution of fluid particles and a set of distributions for fractions of differently bonded species MH - Mexico|Distrito Federal MH - Poland PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000088828900027 L2 - DIRECTIONAL ATTRACTIVE FORCES; DENSITY-FUNCTIONAL THEORY; MONTE-CARLO SIMULATIONS; HARD-WALL; ADSORPTION; EQUATION; TRANSITIONS; EQUILIBRIA; PROFILES; SPHERE SO - Journal of Physical Chemistry B 2000 ;104(32):7756-7763 1207 UI - 15746 AU - Malo EA AU - Renou M AU - Guerrero A AD - CSIC, Dept Biol Organ Chem, IIQAB, ES-08034 Barcelona, SpainECOSUR, Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoINRA, Unite Phytopharm & Mediateurs Chim, F-78026 Versailles, FranceGuerrero, A, CSIC, Dept Biol Organ Chem, IIQAB, Jordi Girona 18-26, ES-08034 Barcelona, Spain TI - Analytical studies of Spodoptera littoralis sex pheromone components by electroantennography and coupled gas chromatography-electroantennographic detection AB - In this paper we present analytical studies of the sex pheromone components of the Egyptian armyworm Spodoptera littoralis (Lepidoptera, Noctuidae) by electroantennography (EAG) and coupled gas chromatography-electroantennographic detection (GC-EAD). EAG responses in three different preparations, using an insect's head, an excised antenna and a live insect, have been recorded. EAG depolarizations of live insects were significantly higher than those elicited by the insect's head or the excised antenna. The responses were dose-dependent. Live insects also allowed regular pheromone stimulations for 40 min with only 38% decrease of the EAG initial depolarization. The synthetic pheromone blend elicited the highest EAG activity (2.0 +/- 0.3 mV), followed by the major compound (Z,E)-9,11-tetradecadienyl acetate (I) (1.54 +/- 0.1mV), and the minor components (Z)-9-tetradecenyl acetate (II), (E)-11-tetradecenyl acetate (III), tetradecyl acetate (IV) and (Z)-11-tetradecenyl acetate (V) (1.21-1.32 mV range). (Z,E)-9,12-tetradecadienyl acetate (VI), although not present in the pheromone blend of our strain, also showed an EAG activity (1.32 +/- 0.09 mV) similar to that of the monoenic components. GC-EAD responses confirmed the composition of the sex pheromone blend, the major response being elicited by the main component I followed by the other minor compounds II-V. The new dienic compound found in the female pheromone gland, (E,E)-10,12-tetradecadienyl acetate (VII), was not electrophysiologically active. Regarding sensitivity, the minimum amount detectable to elicit an antennal response in our GC-EAD system was 15 pg of the major component. In our system, which was built with cheap and easily available materials, no cooling of the effluent at the outlet of the chromatographic column is required. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Chiapas MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0039-9140 UR - ISI:000087888400018 L2 - electroantennographic detector;Egyptian armyworm;Spodoptera littoralis;sex pheromone;BEHAVIORAL-RESPONSES; LEPIDOPTERA; FEMALE; NOCTUIDAE; DISCRIMINATION; VOLATILES; SYSTEM; MOTHS; FIELD SO - Talanta 2000 ;52(3):525-532 1208 UI - 15585 AU - Malo JE AU - Jimenez B AU - Suarez F AD - Univ Autonoma Madrid, Fac Ciencias, Dept Interuniv Ecol, E-28049 Madrid, SpainUniv Autonoma Yucatan, Fac Med Vet & Zootecn, Dept Ecol, Merida, Yucatan, MexicoMalo, JE, Univ Autonoma Madrid, Fac Ciencias, Dept Interuniv Ecol, E-28049 Madrid, Spain TI - Herbivore dunging and endozoochorous seed deposition in a Mediterranean dehesa AB - Spatial patterns of herbivore defecation within grazing systems are important as they directly affect pasture growth and composition. These effects are partially linked to seed dispersal in dung, a little studied process. This paper focuses on: (1) quantification of dung and seeds deposited by herbivores in a Mediterranean grazing system, and (ii) analysis of the spatial variability of dung and seeds deposited within and among plant communities. We carried out year-long monthly quantifications of the depositions of rabbit (Oryctolagus cuniculus), fallow deer (Dama dama), red deer (Cervus elaphus), and cow (Bos taurus) dung to 32 plots distributed in Quercus rotundifolia Lam. and Fraxinus angustifolia Vahl woodlands, mixed scrub, and Cistus ladanifer L. scrub. We also quantified the germinable seed content of dung. The results revealed differences (p < 0.05) in dung deposition, varying (i) among the 4 species, (ii) within species (except for the red deer) among plant communities, and (iii) within plant communities. An average of 735 seeds/m(2) were returned to the soil via dung, with the highest numbers in open woodlands (870-1,888 seeds/m(2)) and the lowest numbers in scrubs (83-315 seeds/m(2)). Cows dispersed the most seeds (68%), followed by red deer (20%), rabbits (7%), and fallow deer (5%). Spatial variability in deposition led to accumulations of up to several thousand seeds at points covered by the dung. The effect of seed input to the seed bank and on vegetation may be low at large and medium-sized spatial scales, but it can be very important at small scales and for colonization processes MH - Mexico|Yucatan MH - Spain PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 10 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 0022-409X UR - ISI:000088341100014 L2 - spatial pattern;dispersal;dung;herbivores;endozoochory;Mediterranean pastures;CATTLE FECES; DISPERSAL; GRASSLAND; PASTURE; LEGUME; ESTABLISHMENT; GERMINATION; RECRUITMENT; CALIFORNIA; SURVIVAL SO - Journal of Range Management 2000 ;53(3):322-328 1209 UI - 15222 AU - Mancini S AU - Moya-Cessa H AU - Tombesi P AD - Univ Milan, Dipartimento Fis, I-20133 Milan, ItalyUniv Camerino, Dipartimento Matemat & Fis, I-62032 Camerino, ItalyIst Nazl Fis Mat, Camerino, ItalyINAOE, Coordinac Opt, Puebla 72000, MexicoMancini, S, Univ Milan, Dipartimento Fis, Via Celoria 16, I-20133 Milan, Italy TI - Vibrational superposition states without rotating wave approximation AB - We propose a scheme to generate superpositions of coherent states for the vibrational motion of a laser-cooled trapped ion. It is based on the interaction with a standing wave making use of the counter-rotating terms, i.e. not applying the rotating wave approximation. We also show that the same scheme can be exploited for quantum state measurement, i.e. with the same scheme non-classical states may be reconstructed MH - Italy MH - Mexico|Puebla PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000089402200009 L2 - ODD COHERENT STATES; TRAPPED ION; MACROSCOPIC SUPERPOSITIONS; QUANTUM; RECONSTRUCTION; GENERATION; CAVITY; MOTION; EVEN SO - Journal of Modern Optics 2000 ;47(12):2133-2136 1210 UI - 15194 AU - Mandujano-Chavez A AU - Schoenbeck MA AU - Ralston LF AU - Lozoya-Gloria E AU - Chappell J AD - Univ Kentucky, Dept Agron, Plant Physiol Biochem Mol Biol Program, Lexington, KY 40546, USAIPN, CINVESTAV, Dept Ingn Genet Plantas, Unidad Irapuato, Irapuato 36500, Gto, MexicoChappell, J, Univ Kentucky, Dept Agron, Plant Physiol Biochem Mol Biol Program, Lexington, KY 40546 USA TI - Differential induction of sesquiterpene metabolism in tobacco cell suspension cultures by methyl jasmonate and fungal elicitor AB - Jasmonates are well documented for their ability to modulate the expression of plant genes and to influence specific aspects of disease/pest resistance traits. We and others have been studying the synthesis of sesquiterpene phytoalexins in elicitor/pathogen-challenged plants and have sought to determine if methyl jasmonate (MeJA) could substitute for fungal elicitors in the induction of capsidiol accumulation by tobacco cell cultures. The current results demonstrate that MeJA does in fact induce phytoalexin accumulation, but with a much more delayed induction time course than elicitor. While elicitor treatment induced strong but transient changes in key enzymes of sesquiterpene biosynthesis, sesquiterpene cyclase, and aristolochene/deoxy-capsidiol hydroxylase, MeJA did not. Instead, MeJA caused a protracted induction of cyclase activity and only a low level of hydroxylase activity, MeJA induced the expression of at least two sesquiterpene cyclase genes, including: one that had not been observed previously in elicitor-induced mRNA populations, Only a small portion of the total sesquiterpene cyclase mRNA induced by MeJA was associated with polysomal RNA, suggesting that the MeJA treatment imposed both transcriptional and posttranscriptional regulation in tobacco cells, These results are not consistent with MeJA playing a role in orchestrating defense responses in elicitor-treated tobacco cells, but do provide evidence that MeJA induces a subset of genes coding for the biosynthesis of sesquiterpene phytoalexins. (C) 2000 Academic Press MH - USA MH - Mexico|Guanajuato PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0003-9861 UR - ISI:000089557300014 L2 - methyl jasmonate-defense response;phytoalexins;GENE-EXPRESSION; OCTADECANOID PATHWAY; PHYTOALEXIN PRODUCTION; CATHARANTHUS-ROSEUS; SQUALENE SYNTHETASE; ARACHIDONIC-ACID; CYCLASE GENE; GREEN-PEPPER; DEFENSE; BIOSYNTHESIS SO - Archives of Biochemistry and Biophysics 2000 ;381(2):285-294 1211 UI - 15608 AU - Manjarrez ES AU - Albasi C AU - Riba JP AD - ENSIGC, CNRS, UMR 5593, Lab Genie Chim, F-31078 Toulouse, FranceIPN, Unidad Profes Interdisciplinaria Biotecnol, Dept Bioingn, Mexico City 07340, DF, MexicoAlbasi, C, ENSIGC, CNRS, UMR 5593, Lab Genie Chim, 18 Ch Loge, F-31078 Toulouse, France TI - A two-reservoir, hollow-fiber bioreactor for the study of mixed-population dynamics: Design aspects and validation of the approach AB - A two-reservoir, membrane bioreactor for carrying out studies of mixed-population dynamics in batch fermentations is presented. Mixing requirements and design aspects for the validity of the approach are given and discussed. Equations describing mixing times between the reservoirs are presented and compared to the experimental results. The validity of the approach is demonstrated by the study of an amensalistic-type interaction, the protein-mediated killer phenomenon between two Saccharomyces cerevisiae strains. The validation consisted in the comparison between the results obtained in actual mixed culture and the results obtained by keeping the strains separated. A good agreement was found which demonstrates the viability of the designed bioreactor. (C) 2000 John Wiley & Sons, Inc MH - France MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000088421700006 L2 - mixed culture dynamics;membrane reactor;killer phenomenon;KILLER TOXIN; YEAST SO - Biotechnology and Bioengineering 2000 ;69(4):401-408 1212 UI - 14586 AU - Manko VS AU - Ruiz E AU - Manko OV AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Salamanca, Area Fis Teor, E-37008 Salamanca, SpainMoscow MV Lomonosov State Univ, Dept Quantum Stat & Field Theory, Moscow 119899, RussiaManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Is equilibrium of aligned Kerr black holes possible? AB - We show that equilibrium of two Kerr black holes can be achieved by placing between them a relativistic disk or a third Ken black hole, the latter case demonstrating the existence of equilibrium configurations in the purely black hole systems with the number of constituents more than two MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000166132500006 L2 - EQUATIONS SO - Physical Review Letters 2000 ;85(26):5504-5506 1213 UI - 15092 AU - Manko VS AU - Ruiz E AU - Sanabria-Gomez JD AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Salamanca, Area Fis Teor, E-37008 Salamanca, SpainManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP14-740, Mexico City 07000, DF, Mexico TI - Extended multi-soliton solutions of the Einstein field equations: II. Two comments on the existence of equilibrium states AB - The results of our previous paper are applied to solving analytically the balance problem in the double-Kerr solution for all three possible types of binary systems, i.e. when a binary system is composed of two non-extreme black holes, of a non-extreme black hole and a hyperextreme object and of two hyperextreme objects. We also construct a new stationary electrovacuum metric representing binary systems of charged, magnetized, rotating, aligned masses involving one extreme object and on the basis of the numerical study of balance equations we conjecture that the equilibrium states in such systems are impossible MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000089737700023 L2 - GENERAL-RELATIVITY; CHARGED MASSES; MAXWELL-EQUATIONS; BLACK-HOLES; MOMENTS; SPACE SO - Classical and Quantum Gravity 2000 ;17(18):3881-3898 1214 UI - 15388 AU - Manko VS AU - Sanabria-Gomez JD AU - Manko OV AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMoscow MV Lomonosov State Univ, Dept Quantum Stat & Field Theory, Moscow 119899, RussiaManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Nine-parameter electrovac metric involving rational functions AB - An analytically extended nine-parameter family of the electrovac rational function solutions of the Einstein-Maxwell equations generalizing the Chen-Guo-Ernst class of hyperextreme spacetimes is presented. The general four-soliton asymptotically flat solution possessing the equatorial symmetry and involving five independent real parameters is derived in a concise analytical form and its relevance to the equilibrium problem of two extreme particles is discussed MH - Mexico|Distrito Federal MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088793100090 L2 - EINSTEIN-MAXWELL-EQUATIONS; RIGIDLY ROTATING-DISK; RELATIVISTIC GRAVITATIONAL-FIELD; SATO DELTA=2 SOLUTION; STATIONARY GENERALIZATION; MASS; KERR; DUST; SCHWARZSCHILD; SYMMETRIES SO - Physical Review D 2000 ;62(4):art-044048 1215 UI - 14765 AU - Manolis AJ AU - Grossman E AU - Jelakovic B AU - Jacovides A AU - Bernhardi DC AU - Cabrera WJ AU - Watanabe LS AU - Barragan J AU - Matadamas N AU - Mendiola A AU - Woo KS AU - Zhu JR AU - Mejia AD AU - Bunt T AU - Dumortier T AU - Smith RD AD - Tzanio Gen Hosp, Piraeus, GreeceShebah Med Ctr, Ramat Gan, IsraelClin Hosp Ctr, Zagreb, CroatiaMidrand Med Ctr, Midrand, South AfricaClin Vesalio, Lima, PeruClin San Felipe, Lima, PeruHosp Reg Pemex, Veracruz, MexicoHosp Civil Alvaro Amesquita, Acapulco, MexicoHosp Dario Fernandez, Mexico City, DF, MexicoChinese Univ Hong Kong, Hong Kong, Hong Kong, Peoples R ChinaZhongshan Hosp, Shanghai, Peoples R ChinaUniv Philippines, Philippine Gen Hosp, Manila, PhilippinesMerck & Co Inc, Whitehouse Stn, NJ, USAMerck Sharp & Dohme Europe Inc, Clin Biostat & Res Data Syst, Brussels, BelgiumSmith, RD, 1 Merck Dr,WS-3C-50, Whitehouse Stn, NJ 08889, USA TI - Effects of losartan and candesartan monotherapy and losartan/hydrochlorothiazide combination therapy in patients with mild to moderate hypertension AB - Objective: The goal of this multicenter, double-blind, randomized, parallel-group study was to compare the effects of losartan potassium (hereafter referred to as losartan), candesartan cilexitil (hereafter referred to as candesartan), and losartan/hydrochlorothiazide (HCTZ) in patients with mild to moderate hypertension (sitting diastolic blood pressure [SiDBP] 95-115 mm Hg). Methods: A total of 1161 patients were randomized in a 2:2:1 ratio to 12 weeks of treatment with losartan 50 mg QD, possibly titrated to 100 mg QD (n = 461); candesartan 8 mg QD, possibly titrated to 16 mg QD (n = 468); or losartan 50 mg QD, possibly titrated to losartan 50 mg plus HCTZ 12.5 mg QD (n = 232). At 6 weeks, the regimens of patients not reaching a goal SiDBP <90 mm Hg were titrated as described, whereas patients achieving this goal continued with low-dose monotherapy. The single primary end point at 12 weeks tested the equivalence of the 2 monotherapy regimens, predefined as a maximum betweentreatment difference in the mean change from baseline trough SiDBP of 2.5 mm Hg. Results: At 12 weeks, changes in SiDBP/sitting systolic blood pressure (SiSBP) of -12.4/-14.4 mm Hg with losartan 50 mg/100 mg and -13.1/-15.8 mm Hg with candesartan 8 mg/16 mg demonstrated equivalence between the 2 monotherapy regimens (95% CI for difference in SiDBP, -1.6 to 0.2). At 12 weeks, the losartan 50 mg/50 mg plus HCTZ 12.5 mg regimen had reduced SiDBP/SiSBP significantly more (-14.3/-18.0 mm Hg) than either the candesartan 8 mg/16 mg (SiDBP, P = 0.045; SiSBP, P = 0.017) or losartan 50 mg/100 mg regimen (SiDBP and SiSBP, P = 0.001). During the last 6 weeks, patients whose regimen had been titrated to losartan 50 mg plus HCTZ 12.5 mg (n = 114) showed a,oreater reduction in SiDBP/SiSBP (-14.5/-18.7 mm Hg) than did those whose regimen had been titrated to either losartan 100 mg (-10.5/-12.3 mm Hg; n = 211) or candesartan 16 mg (-11.5/-13.2 mm Hg; n = 206), representing a clinically meaningful (2.5-mm Hg) difference. All 3 treatments were well tolerated, with few patients experiencing drug-related adverse events (6.9% losartan 50 mg/100 mg, 7.5% candesartan 8 mg/16 mg, 3.0% losartan 50 mg/50 mg plus HCTZ 12.5 mg). Candesartan 8 mg/16 mg increased serum uric acid levels (0.13 mg/dL; 95% CI, 0.04 to 0.23), whereas losartan 50 mg/100 mg decreased them (-0.14 mg/dL; 95% CI, -0.24 to -0.04), and losartan 50 mg/50 mg plus HCTZ 12.5 mg left them unchanged (0.06 mg/dL; 95% CI, -0.07 to 0.20). Conclusions: Losartan 50 mg/100 mg and candesartan 8 mg/16 mg were comparable treatments in terms of blood pressure reduction. After titration, losartan 50 mg plus HCTZ 12.5 mg was superior to either candesartan 16 mg or losartan 100 mg in reducing hypertension. Losartan, but not candesartan, lowered serum uric acid levels and attenuated the expected increase in uric acid levels with HCTZ 12.5 mg MH - Belgium MH - Croatia MH - Greece MH - Israel MH - Mexico|Guerrero MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - Peoples R China MH - Peru MH - Philippines MH - South Africa MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 37 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0149-2918 UR - ISI:000165688900004 L2 - angiotensin II antagonist;antihypertensive therapy;losartan;candesartan;hydrochlorothiazide;II RECEPTOR ANTAGONIST; BLOOD-PRESSURE; SYSTEMIC HYPERTENSION; TOLERABILITY; VALSARTAN; EFFICACY; HYDROCHLOROTHIAZIDE; CILEXETIL; SAFETY SO - Clinical Therapeutics 2000 ;22(10):1186-1203 1216 UI - 15038 AU - Mansilla R AD - Natl Univ Mexico, Inst Phys, Dept COmplex Syst, Mexico City 01000, DF, MexicoUniv Havana, Fac Math & Comp Sci, Dept Differential Equat, Havana, CubaMansilla, R, Natl Univ Mexico, Inst Phys, Dept COmplex Syst, Mexico City 01000, DF, Mexico TI - Algorithmic complexity in the minority game AB - In this paper, we present our approach for the study of the complexity of Minority Game using tools from thermodynamics and statistical physics. Previous attempts were based on the behavior of volatility, an observable of the financial markets. Our approach focuses on some properties of the binary stream of outcomes of the game. Physical complexity, a magnitude rooted in Kolmogorov-Chaitin theory, allows us to explain some properties of collective behavior of the agents. Mutual information function, a measure related to Shannon's information entropy, was useful to observe a kind of phase transition when applied to the binary string of the whole history of the game MH - Cuba MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000089976800016 L2 - INFORMATION SO - Physical Review e 2000 ;62(4):4553-4557 1217 UI - 15390 AU - Mansilla R AD - Natl Autonomous Univ Mexico, Inst Phys, Dept Complex Syst, Mexico City 04510, DF, MexicoUniv Havana, Fac Math & Comp Sci, Dept Differential Equat, Havana, CubaMansilla, R, Natl Autonomous Univ Mexico, Inst Phys, Dept Complex Syst, Mexico City 04510, DF, Mexico TI - From naive to sophisticated behavior in multiagents-based financial market models AB - The behavior of physical complexity and mutual information function of the outcome of a model of heterogeneous, inductive rational agents inspired by the El Farol Bar problem and the Minority Game is studied. The first magnitude is a measure rooted in the Kolmogorov-Chaitin theory and the second a measure related to Shannon's information entropy. Extensive computer simulations were done, as a result of which, is proposed an ansatz for physical complexity of the type C(l)= l(alpha) and the dependence of the exponent alpha from the parameters of the model is established. The accuracy of our results and the relationship with the behavior of mutual information function as a measure of time correlation of agents choice are discussed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000088897300041 L2 - minority game;entropy;physical complexity;mutual information function;GAME SO - Physica A-Statistical Mechanics and Its Applications 2000 ;284(1-4):478-488 1218 UI - 15658 AU - Manske GGB AU - Ortiz-Monasterio JI AU - van Ginkel M AU - Gonzalez RM AU - Rajaram S AU - Molina E AU - Vlek PLG AD - Univ Bonn, Ctr Dev Res, D-53113 Bonn, GermanyCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoInst Nacl Invest Forestales Agr & Pecuarias, Morelia, Michoacan, MexicoManske, GGB, Univ Bonn, Ctr Dev Res, Walter Flex Str 3, D-53113 Bonn, Germany TI - Traits associated with improved P-uptake efficiency in CIMMYT's semidwarf spring bread wheat grown on an acid Andisol in Mexico AB - Phosphorus deficiency is a major yield limiting constraint in wheat cultivation on acid soils. The plant factors that influence P uptake efficiency (PUPE) are mainly associated with root characteristics. This study was conducted to analyze the genotypic differences and relationships between PUPE, root length density (RLD), colonization by vesicular arbuscular and arbuscular mycorrhizal (V)AM fungi and root excretion of phosphatases in a P-deficient Andisol in the Central Mexican Highlands. Forty-two semidwarf spring-bread-wheat (Triticum aestivum L.) genotypes from CIMMYT were grown without (-P) and with P fertilization (+P), and subsequently in subsets of 30 and 22 genotypes in replicated field trials over 2 and 3 years, respectively. Acid phosphatase activity at the root surface (APASE) was analyzed in accompanying greenhouse experiments in nutrient solution. In this environment, PUPE contributed more than P utilization efficiency, in one experiment almost completely, to the variation of grain yield among genotypes. Late-flowering genotypes were higher yielding, because the postanthesis period of wheat was extended due to the cold weather at the end of the crop cycles, and postanthesis P uptake accounted for 40-45% of total P uptake. PUPE was positively correlated with the numbers of days to anthesis (at -P r=0.57 and at +P r=0.73). The RLD in the upper soil layer (0-20 cm) of the wheat germplasm tested ranged from 0.5 to 2.4 cm cm(-3) at -P and 0.7 to 7.7 at +P. RLD was the most important root trait for improved P absorption, and it was positively genetically correlated with PUPE (at -P r=0.42 and at +P r=0.63) and the number of spikes m(-2) (at -P r=0.58 and at +P r=0.36). RLD in the upper soil layer was more important with P fertilizer application. Without P fertilization, root proliferation in the deeper soil profile secured access to residual, native P in the deeper soil layer. (V)AM-colonisation and APASE were to a lesser degree correlated with PUPE. Among genoptypes, the level of (V)AM-colonisation ranged from 14 to 32% of the RLD in the upper soil layer, and APASE from 0.5 to 1.1 nmol s(-1) plant(-1) 10(-2) MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 23 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000088040800008 L2 - Andisol;phosphatases;phosphorus;roots;VA mycorrhiza;wheat;PHOSPHORUS EFFICIENCY; ROOT LENGTH; NUTRIENT EFFICIENCY; SOIL-PHOSPHORUS; PLANTS; ACQUISITION; CONTRIBUTE; RESPONSES; GENOTYPES; VARIETIES SO - Plant and Soil 2000 ;221(2):189-204 1219 UI - 14916 AU - Manson RH AD - Inst Ecosyst Studies, Millbrook, NY 12545, USAManson, RH, Inst Ecol AC, Dept Ecol Vegetal, Antigua Carretera Coutepec Km 2-5,AP 63, Xalapa, Veracruz, Mexico TI - Spatial autocorrelation and the interpretation of patterns of tree seed and seedling predation by rodents in old-fields AB - Spatial autocorrelation is ubiquitous in ecological systems. However, consideration of this phenomenon in seed and seedling predation studies has been limited, perhaps explaining some of the variation observed between studies and the difficulty in generalizing about the impacts of herbivores on successional processes. I examined the prevalence and patterns of spatial autocorrelation in seed and seedling survival between neighboring tree propagules in old-fields. All experiments were conducted within enclosures in which I manipulated the density of meadow voles (Microtus pennsylvanicus). Voles, and competitively inferior white-footed mice (Peromyscus leucopus), are the dominant consumers of tree seedlings and seeds in old-fields in the northeastern United States, respectively. An intermediate level of spatial autocorrelation was present in seed and seedling predation trials. Furthermore. the frequency of spatial autocorrelation increased under low-vole density conditions and in study sites with greater heterogeneity in vegetation cover. Survival of neighboring tree propagules was generally positively autocorrelated, suggesting that foraging by mice and voles contributes to a clumped pattern of tree propagule establishment in old-fields. A review of published predation studies found that only 8.3% attempted to test for spatial autocorrelation and that the minimum average spacing used between replicates is well below the average autocorrelation distance of 8.1 +/- 6.3 m observed in the current study. Patterns of autocorrelation appear somewhat predictable based on knowledge of the ecology of mice and voles and to provide insights into the factors influencing their foraging behavior and potential impacts on old-field succession MH - Mexico|Veracruz MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 6 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000165237400016 L2 - MICROTUS-PENNSYLVANICUS; OLDFIELD SUCCESSION; POPULATION-DENSITY; HOME RANGE; HETEROGENEITY; HERBIVORY; SURVIVAL; HABITAT; ESTABLISHMENT; VERTEBRATE SO - Oikos 2000 ;91(1):162-174 1220 UI - 16501 AU - Manzano MG AU - Navar J AD - UANL, Fac Ciencias Forestales, Linares 67700, Nuevo Leon, MexicoUniv Toronto, Fac Forestry, Toronto, ON, CanadaNavar, J, UANL, Fac Ciencias Forestales, Linares 67700, Nuevo Leon, Mexico TI - Processes of desertification by goats overgrazing in the Tamaulipan thornscrub (matorral) in north-eastern Mexico AB - During the period of October 1995 to October 1996 a single overgrazing episode was monitored to determine the effects of overgrazing by goats on leaf cover in five vertical strata. Soil bulk density, infiltration rates, organic matter content, and the concentration of soil macronutrients within the Tamaulipan thornscrub (matorral) of north-eastern Mexico were assessed. Variance, covariance, and principal component analyses of the data suggest that leaf cover and soil bulk density were affected by overgrazing. There were no statistically significant differences in infiltration rates, organic matter content, or macronutrients. This may be the result of the large spatial variability associated with these parameters or the short time period in which these parameters were monitored. Changes in plant species composition, vegetation cover, and soil compaction were identified as early responses to overgrazing within this ecosystem. The importance of identifying early indicators of overgrazing and the need for future research are discussed. (C) 2000 Academic Press MH - Canada MH - Mexico|Nuevo Leon PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 20 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000085401900001 L2 - overgrazing;Tamaulipan thornscrub;desertification;leaf cover;soil infiltration;soil bulk density;Vertisol;GRAZING INTENSITY; INDICATORS; VEGETATION; SYSTEMS; PLAINS SO - Journal of Arid Environments 2000 ;44(1):1-17 1221 UI - 15209 AU - Marchenko SV AU - Rauw G AU - Antokhina EA AU - Antokhin II AU - Ballereau D AU - Chauville J AU - Corcoran MF AU - Costero R AU - Echevarria J AU - Eversberg T AU - Gayley KG AU - Koenigsberger G AU - Miroshnichenko AS AU - Moffat AFJ AU - Morrell NI AU - Morrison ND AU - Mulliss CL AU - Pittard JM AU - Stevens IR AU - Vreux JM AU - Zorec J AD - Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Observ Mt Megant, Montreal, PQ H3C 3J7, CanadaUniv Liege, Inst Astrophys & Geophys, B-4000 Liege, BelgiumMoscow MV Lomonosov State Univ, Sternberg State Astron Inst, Moscow 119899, RussiaObserv Paris Meudon, DASGAL, UMR 8633, F-92125 Meudon, FranceNASA, Goddard Space Flight Ctr, Univ Space Res Assoc, High Energy Astrophys Lab, Greenbelt, MD 20771, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, MexicoUniv Iowa, Iowa City, IA 52245, USAUniv Toledo, Ritter Observ, Toledo, OH 43606, USAObserv La Plata, RA-1900 La Plata, ArgentinaUniv Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, EnglandInst Astrophys, F-75014 Paris, FranceMarchenko, SV, Univ Montreal, Dept Phys, CP 6128,Succursale Centreville, Montreal, PQ H3C 3J7, Canada TI - Coordinated monitoring of the eccentric O-star binary Iota Orionis: optical spectroscopy and photometry AB - With the objective of investigating the wind-wind collision phenomenon and supporting contemporaneous X-ray observations, we have organized a large-scale, coordinated optical monitoring campaign of the massive, highly eccentric O9 III+B1 III binary Iota Orionis. Successfully separating the spectra of the components, we refine the orbital elements and confirm the rapid apsidal motion in the system. We also see strong interaction between the components during periastron passage and detect phase-locked variability in the spectrum of the secondary star. However, we find no unambiguous signs of the bow shock crashing on the surface of the secondary, despite the predictions of hydrodynamic simulations. Combining all available photometric data, we find rapid, phase-locked variations and model them numerically, thus restricting the orbital inclination to 50 degrees less than or similar to i less than or similar to 70 degrees MH - Argentina MH - Belgium MH - Canada MH - United Kingdom MH - France MH - Mexico|Michoacan MH - Russia MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000089401400013 L2 - binaries : general;stars : early-type;stars : general;stars : individual : Iota Orionis;COLLIDING STELLAR WINDS; 29-UW CANIS-MAJORIS; X-RAY-EMISSION; CLOSE BINARY; SYSTEMS; SEARCH; MODEL; ATMOSPHERES; SPECTRUM; CURVES SO - Monthly Notices of the Royal Astronomical Society 2000 ;317(2):333-342 1222 UI - 15621 AU - Mariano A AU - Castro GL AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoNatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaMariano, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Dynamical model for pion-nucleon bremsstrahlung AB - A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction pi N-->pi N gamma at low energies. The Delta(1232) degrees of freedom are incorporated in a way consistent with both electromagnetic gauge invariance and invariance under contact transformations. The model also includes the initial- and final-state rescattering of hadrons via a T matrix with off-shell effects. The pi N gamma differential cross sections are calculated using three different T-matrix models and the results are compared with the soft photon approximation, and with experimental data. The aim of this analysis is to test the off-shell behavior of the different T matrices under consideration MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000088139200027 L2 - RELATIVISTIC RESONANCE MODEL; MESON-EXCHANGE MODEL; PROTON BREMSSTRAHLUNG; N SCATTERING; GAMMA-N->PI-N REACTION; PHOTOPRODUCTION; UNITARY SO - Physical Review C 2000 ;6201(1): 1223 UI - 16522 AU - Marin C AU - Garzo V AU - de Haro ML AD - Univ Extremadura, Dept Fis, E-06071 Badajoz, SpainUniv Florida, Dept Phys, Gainesville, FL 32611, USAUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, MexicoUniv Extremadura, Dept Matemat, E-06071 Badajoz, SpainGarzo, V, Univ Extremadura, Dept Fis, E-06071 Badajoz, Spain TI - Shear-rate dependent transport coefficients in a binary mixture of Maxwell molecules AB - Mass and heat transport in a dilute binary mixture of Maxwell molecules under steady shear flow are studied in the limit of small concentration gradients. The analysis is made from the Gross-Krook kinetic model of the Boltzmann equation. This model is solved by means of a perturbation solution around the steady shear flow solution [Phys. Fluids 8, 2756 (1996)], which applies for arbitrary values of the shear rate. In the first order of the expansion the results show that the mass and heat fluxes are proportional to the concentration gradient but, due to the anisotropy of the problem, mutual diffusion and Dufour tensors can be identified, respectively. Both tensors are explicitly determined in terms of the shear rate and the parameters of the mixture (particle masses, concentrations, and force constants). A comparison with the results derived from the exact Boltzmann equation at the level of the diffusion tensor shows a good agreement for a wide range of values of the shear rate. (C) 2000 American Institute of Physics. [S1070-6631(00)02102-4] MH - Mexico|Morelos MH - Spain MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-6631 UR - ISI:000085241100026 L2 - GENERAL REPULSIVE INTERACTIONS; MONTE-CARLO SIMULATION; BOLTZMANN-EQUATION; TRACER DIFFUSION; KINETIC-MODELS; SELF-DIFFUSION; FLOW; COMPUTER SO - Physics of Fluids 2000 ;12(3):717-726 1224 UI - 15187 AU - Marotta F AU - Tajiri H AU - Barreto R AU - Brasca P AU - Ideo GM AU - Mondazzi L AU - Safran P AU - Bobadilla J AU - Ideo G AD - S Giuseppe Hosp, Div Med Sci, Hepatogastroeneterol Dept, Milan, ItalyNatl Shikoku Canc Ctr Hosp, Res Div Dept, Matsuyama, Ehime, JapanInst Nacl Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City 14000, DF, MexicoSFJO Lab, Paris, FranceMarotta, F, Via Pisanello 4, I-20146 Milan, Italy TI - Cyanocobalamin absorption abnormality in alcoholics is improved by oral supplementation with a fermented papaya-derived antioxidant AB - Background/Aims: Thirty alcoholic patients and 24 teetotaler dyspeptic patients were considered and underwent baseline blood chemical evaluation and the Schilling test. Methodology: During gastroscopy, biopsy samples were taken to assay: routine histology, malonyldialdehyde, vitamin E and glulathione concentration and for testing vitamin B-12 - Intrinsic Factor binding. Examinations were repeated after 1-week supplementation with Bionormalizer. Results: Plasma malonyldialdehyde level and lipid hydroperoxides concentration as well as either malonyldialdehyde and xanthine oxidase concentration in the gastric mucosa in alcoholics were significantly higher than in controls and despite unchanged alcohol consumption, significantly decreased after Bionormalizer supplementation. Gastric mucosal glutathione was markedly depressed in alcoholics and partly recovered after Bionormalizer supplementation Although the alcoholics showed a normal intrinsic factor secretion in the gastric juice, they exhibited a markedly depressed intrinsic factor-cobalamin binding on the "ex vivo" study. Moreover, nearly 23% of them had an abnormal Schilling test. Both these impairments reverted to normal after Bio-normalizer supplementation. Conclusions: It can be postulated that the anti-oxidative action played by Bionormalizer, possibly due to its availability substrates for glutathione synthesis as well as to its effects on local oxidative burst from neutrophil, is able to recover a normal cobalamin absorption MH - France MH - Italy MH - Japan MH - Mexico|Distrito Federal PB - ATHENS: H G E UPDATE MEDICAL PUBL LTD. RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology;Surgery U5 - J;Article AV - English IS - 0172-6390 UR - ISI:000089484900070 L2 - cyanocobalamin absorption;intrinsic factor binding;free-radical damage;bionormalizer;HELICOBACTER-PYLORI INFECTION; GASTRIC-MUCOSAL DAMAGE; INTRINSIC-FACTOR; BIO-NORMALIZER; ETHANOL; GLUTATHIONE; DEFICIENCY; RADICALS; CELLS SO - Hepato-Gastroenterology 2000 ;47(34):1189-1194 1225 UI - 16195 AU - Marquez-Martinez LA AU - Moog CH AU - Velasco-Villa M AD - IRCCyN, CNRS, UMR 6597, F-44321 Nantes 3, FranceInst Politecn Nacl, CINVESTAV, Dept Elect Engn, Mechatron Sect, Mexico City 07000, DF, MexicoMarquez-Martinez, LA, IRCCyN, CNRS, UMR 6597, 1 Rue Noe,BP 92101, F-44321 Nantes 3, France TI - The structure of nonlinear time delay systems AB - Multivariable nonlinear systems with time delays are considered. The delays are supposed to be constant but not commensurate. The goal of this paper is to give a structure algorithm which displays some system invariants for this class of systems MH - France MH - Mexico|Distrito Federal PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000086433000006 L2 - DISTURBANCE SO - Kybernetika 2000 ;36(1):53-62 1226 UI - 16287 AU - Marquez-Rocha FJ AU - Hernandez-Rodriguez VZ AU - Vazquez-Duhalt R AD - UNAM, Inst Biotechnol, Cuernavaca 62270, Morelos, MexicoCtr Invest Ciencia & Educ Super Ensenada, Ensenada 22830, Baja California, MexicoMarquez-Rocha, FJ, CICESE, Dept Acuicultura, POB 434844, San Diego, CA 92143 USA TI - Biodegradation of soil-adsorbed polycyclic aromatic hydrocarbons by the white rot fungus Pleurotus ostreatus AB - The white rot fungus, Pleurotus ostreatus, metabolized four soil adsorbed polycyclic aromatic hydrocarbons: 50% of pyrene (0.1 mg g(-1) dry soil), 68% of anthracene and 63% of phenanthrene were mineralized after 21 d. Biodegradation was increased to 75%, 80% and 75%, respectively of the initial concentration when 0.15% Tween 40 was added. Biodegradation of pyrene in the presence of surfactant and H2O2 (1.0 mM) was 90%. Benz[a]pyrene was also oxidized by Pleurotus ostreatus but it is not mineralized MH - USA MH - Mexico|Baja California MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000086105000007 L2 - biodegradation;hydrogen peroxide;Pleurotus ostreatus;polycyclic aromatic hydrocarbons;surfactants;ANTHRACENE-CONTAMINATED SOIL; PHANEROCHAETE-CHRYSOSPORIUM; PHENANTHRENE; METABOLISM; FLUORENE; OIL SO - Biotechnology Letters 2000 ;22(6):469-472 1227 UI - 16094 AU - Marrodan MD AU - Mesa MS AU - Arechiga J AU - Perez-Magdaleno A AD - Univ Complutense, Fac Ciencias Biol, Dept Biol Anim 1, Secc Antropol, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Antropol, Mexico City 04510, DF, MexicoMarrodan, MD, Univ Complutense, Fac Ciencias Biol, Dept Biol Anim 1, Secc Antropol, E-28040 Madrid, Spain TI - Trend in menarcheal age in Spain: rural and urban comparison during a recent period AB - Menarcheal age of a sample of rural (n = 342) and urban (n = 469) girls with ages ranging from 9 to 16 years from Madrid province was analysed. Results, obtained through the status quo method and probit analysis (age 12.79 SD 1.04 in Madrid city and 12.90 SD 1.03 in rural sample), were compared with data from previous studies carried out in the same area, as well as those from other regions of the Iberian Peninsula. The aim of these comparisons was to establish the variability of menarche in the recent past, considering physical environment, degree of urbanization and socio-economic development. Decline in menarcheal age was detected and, in general, a tendency towards similar means among Spanish populations in the period studied MH - Mexico|Distrito Federal MH - Spain PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 16 U4 - Biology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0301-4460 UR - ISI:000086841200009 L2 - CHILDREN; GROWTH SO - Annals of Human Biology 2000 ;27(3):313-319 1228 UI - 15451 AU - Martel A AU - Caballero-Briones F AU - Oliva AI AU - Castro-Rodriguez R AU - Iribarren A AU - Bartolo-Perez P AU - Pena JL AD - Univ La Habana, Fac Fis, La Habana 10400, CubaIPN, CICATA, Mexico City 11500, DF, MexicoIPN, Dept Appl Phys, CINVESTAV, Merida 97310, Yucatan, MexicoMartel, A, Univ La Habana, Fac Fis, La Habana 10400, Cuba TI - Depth profiling study of the CdTe/CdS/ITO/glass heterostructure with AES and GIXRD AB - In this work we use Auger electron spectroscopy depth profiling and grazing incidence X-ray diffraction (GIXRD) to study chemical composition and structure of the CdTe/CdS/ITO/glass heterostructure. The CdS layer was deposited on ITO (In2Sn2O7-x) substrates by chemical bath deposition and the CdTe film was deposited by double-step close space sublimation. We found by AES profiling a strong intermixing at the CdS/ITO and CdS/CdTe interfaces, confirmed by GIXRD and evidences of two diffusion steps for the CdS into the ITO matrix. Additionally, the CdS/ITO structure was separately investigated in order to know the influence of the substrate roughness on the heterostructure conformation. The morphology of the ITO substrate and the as-deposited CdS layer was studied by atomic force microscopy. The use of GIXRD showed to be useful to study the entire CdTe/CdS/ITO/glass heterostructure. The ITO roughness has proved to be an influencing factor in the structural features and suggested that CdS roughness can also influence the observed composition profiles MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800046 L2 - SOLAR-CELLS; THIN-FILMS; X-RAYS; INTERFACE; CDTE; CDS; PERFORMANCE; DIFFUSION SO - Physica Status Solidi B-Basic Research 2000 ;220(1):261-267 1229 UI - 14695 AU - Marti J AU - Mirabel IF AU - Chaty S AU - Rodriguez LF AD - Univ Jaen, Escuela Politecn Super, Dept Fis, Jaen 23071, SpainCtr Etud Saclay, Serv Astrophys, CEA, DSM,DAPNIA, F-91191 Gif Sur Yvette, FranceInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaOpen Univ, Dept Phys, Milton Keynes MK7 6AA, Bucks, EnglandUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoMarti, J, Univ Jaen, Escuela Politecn Super, Dept Fis, Calle Virgen Cabeza 2, Jaen 23071, Spain TI - VLT search for the infrared counterpart of 1E 1740.7-2942 AB - We report the results of our search for the near infrared counterpart of the microquasar 1E 1740.7-2942 using the VLT1. For the first time, several counterpart candidates have been found in our Ks-band images that may be consistent with the best radio and X-ray positions available for 1E 1740.7-2942. However, the non-detection of variability between two observing epochs and the positional uncertainty still less than or similar to 1 " level prevent us from identifying an unremaining at the ambiguous counterpart. Alternatively, the VLT images set new upper limits significantly deeper than previously reported that constrain the binary companion to be later than B8 V or earlier than G5 III MH - Argentina MH - United Kingdom MH - France MH - Mexico|Michoacan MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000165873600021 L2 - stars : individual : 1E 1740.7-2942;Galaxy : center;infrared : stars;radio continuum : stars;X-rays : stars;X-RAY SOURCES; GALACTIC-CENTER REGION; 1E-1740.7-2942; GRS-1758-258 SO - Astronomy and Astrophysics 2000 ;363(1):184-187 1230 UI - 15909 AU - Marti J AU - Mirabel IF AU - Chaty S AU - Rodriguez LF AD - Univ Jaen, Dept Fis, Escuela Super, Jaen 23071, SpainCtr Etud Saclay, CEA, DSM, DAPNIA,Serv Astrophys, F-91191 Gif Sur Yvette, FranceInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaOpen Univ, Dept Phys, Milton Keynes MK7 6AA, Bucks, EnglandUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoMarti, J, Univ Jaen, Dept Fis, Escuela Super, Calle Virgen Cabeza 2, Jaen 23071, Spain TI - VLT observations of GRS 1915+105 AB - We present near infrared spectroscopy of the superluminal microquasar GRS 1915+105 obtained with the first unit of the VLT (1) and the ISAAC spectro-imager. The emission features detected in the VLT data have been identified as He I, Br gamma, He II and Na I. The detection of Na I is reported here for the first time, while our confirmation of weak He II emission provides support to previous marginal detections of this feature. By comparing the observed spectra with those of massive stars, we find that our results are very consistent with GRS 1915+105 being a high mass X-ray system with an early type primary, as previously proposed by Chaty et al. (1996) and Mirabel et al. (1997). The VLT spectra also provide evidence of P Cygni profiles, that turn into blue emission wings when the system is in outburst. This observed line profile evolution implies that GRS 1915+105 must be surrounded by an expanding envelope, that is partially blown out during the X-ray outbursts. The presence of such circumstellar gaseous material around GRS 1915+105 is more naturally understood in the context of a massive luminous star than if the system was a low-mass X-ray binary MH - Argentina MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000087446700022 L2 - stars : individual : GRS 1915+105;infrared : stars;radio continuum : stars;X-rays : stars;X-RAY BINARIES; MICROQUASAR GRS-1915+105; INFRARED-SPECTROSCOPY; RELATIVISTIC JETS; MASS; OUTBURST; J1655-40; GALAXY SO - Astronomy and Astrophysics 2000 ;356(3):943-948 1231 UI - 15048 AU - Martin M AU - Sandoval L AU - Lefebvre R AU - Atabek O AD - BUAP, Fac Ciencias Comp, Puebla 72001, MexicoUniv Paris 11, Photophys Mol Lab, F-91405 Orsay, FranceUniv Paris 06, UFR Phys Fondamentale & Appl, F-75231 Paris, FranceMartin, M, BUAP, Fac Ciencias Comp, Puebla 72001, Mexico TI - Nonadiabatic tunnelling: an exactly soluble model AB - We consider a system described by two coupled diabatic stepwise constant potentials. This model leads to an exact analytical formula for the transmissivity. It is also possible to give an analytical form to the quantization condition defining the resonance energies of the system. We can in this way provide a detailed view of the transmission profile, with its nodes associated with the resonances of the upper adiabatic potential and a barrier-like resonance pattern in the gap between the two adiabatic potentials MH - France MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000089922600017 L2 - SCATTERING MATRIX; PREDISSOCIATION; SEPARATION; RESONANCES SO - Journal of Physics B-Atomic Molecular and Optical Physics 2000 ;33(18):3665-3675 1232 UI - 16490 AU - Martin X AU - Peter P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoObserv Meudon, DARC, UPR 176, F-92195 Meudon, FranceInst Astrophys, F-75014 Paris, FranceMartin, X, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-74, Mexico City 07000, DF, Mexico TI - Current-carrying string loop motion: Limits on the classical description and shocks AB - The dynamical evolution of superconducting cosmic strings is much more complicated than that of simple Goto-Nambu strings. For this reason, there are only a few known analytical solutions and no numerical ones. The goal of this paper is to present numerical solutions for the dynamics of planar superconducting cosmic string loops. In most cases, a purely dynamical approach turns out to be insufficient to describe correctly the evolution of a loop due mainly to the appearance of shocks when spacelike currents are present and kinks for timelike currents, leading to yet unaccounted for quantum effects. The consequences of the quantum effects are mostly unknown at this time because the problem requires a dynamical field theory treatment. It is however likely that ultimately the result will be massive radiation in the form of charge carriers from the string MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000085383200014 L2 - RAY ENERGY-SPECTRUM; COSMIC STRINGS; EVOLUTION; VORTONS; EQUATION; STATE; INSTABILITY; COLLAPSE; ARRAY SO - Physical Review D 2000 ;6104(4): 1233 UI - 16196 AU - Martinez-Bustos F AU - Garcia MN AU - Chang YK AU - Sanchez-Sinencio F AU - Figueroa CJD AD - Univ Autonoma Queretaro, Fac Quim, CINVESTAV,Lab Invest Mat, Ctr Univ,Ctr Invest & Estudios Avanzados,IPN, Queretaro 76010, MexicoUniv Autonoma Chapingo, Dept Ingn Agroind, Chapingo, Mexico, MexicoUniv Estadual Campinas, Dept Tecnol Alimentos, Fac Engn Alimentos, BR-13083970 Campinas, SP, BrazilIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro, MexicoMartinez-Bustos, F, Univ Autonoma Queretaro, Fac Quim, CINVESTAV,Lab Invest Mat, Ctr Univ,Ctr Invest & Estudios Avanzados,IPN, Cerro Campanas, Queretaro 76010, Mexico TI - Characteristics of nixtamalised maize flours produced with the use of microwave heating during alkaline cooking AB - Whole, ground and abrasively dehulled grains from both normal (H-34 and H-34) and quality protein (QPM and QPMa) maize were mixed with water contents of 70, 95 and 100g kg(-1) and calcium hydroxide concentrations of 0.0, 0.3, 0.5 and 2.0g kg(-1) and heated (operating frequency 2.450MHz, high-power setting) for 10, 15 and 20min in a commercial microwave oven. The cooked grain was then oven dried and milled to obtain nixtamalised maize flour (NMF). The protein contents and test weights of QPM were higher than for the normal hybrids. The highest yields of masa and tortillas were found for the normal hybrids, and these samples did not show significant differences, as compared with the commercial nixtamalised flour (CNMF) used as control, with respect to masa firmness and adhesiveness and tortilla tensile strength. The cutting force of tortillas from hybrid H-30 and QPM did not show significant differences from the control. The highest values of tortilla rollability were found for the control followed by hybrid H-34. The values of residual cooking liquor for microwave-heated samples were lower than for the control. Ground or dehulled maize grain gave sticky masa and poor mechinical characteristics. Tortillas from whole grain showed good characteristics of texture and consistency of masa, and the tortillas were subjectively similar in colour, flavour and rollability to the tortillas prepared with CNMF. These results indicate a potential use of microwave energy to produce NMF for tortillas and derivatives. (C) 2000 Society of Chemical Industry MH - Brazil MH - Mexico|Estado De Mexico MH - Mexico|Queretaro PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000086416900003 L2 - nixtamalised maize flours;tortillas;microwave heating;QUALITY PROTEIN MAIZE; TORTILLA SO - Journal of the Science of Food and Agriculture 2000 ;80(6):651-656 1234 UI - 16353 AU - Martinez-Celorio RA AU - Davila A AU - Kaufmann GH AU - Mendiola G AD - Ctr Invest Opt, Leon 37000, Guanajuato, MexicoUniv Nacl Rosario, CONICET, Inst Fis Rosario, RA-2000 Rosario, ArgentinaMartinez-Celorio, RA, Ctr Invest Opt, AC Apdo 1-948, Leon 37000, Guanajuato, Mexico TI - Extension of the displacement measurement range for electronic speckle-shearing pattern interferometry using carrier fringes and a temporal-phase-unwrapping method AB - A technique for increasing the displacement measurement range in electronic speckle-shearing pattern interferometry is proposed. The technique is based on the introduction of carrier fringes and the use of a temporal-phase-unwrapping method to obtain larger measuring ranges of out-of-plane displacements of an object without sign ambiguities. A larger measuring range is obtained by dividing the desired maximum-phase range into several subranges where the spatial synchronous detection method can be successfully applied. These phase subranges correspond to small out-of-plane displacements of the object, and a speckle pattern is recorded for each displacement. The carrier fringes are obtained by the subtraction correlation of two consecutive speckle fields with a translation of the illuminating beam between recordings. The method allows the measurement of object displacements of about 216 mu m. (C) 2000 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)01803-1] MH - Argentina MH - Mexico|Guanajuato PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000085913100024 L2 - shearing interferometry;spatial synchronous detection;temporal-phase unwrapping;speckle phenomena;optical metrology;RECONSTRUCTION SO - Optical Engineering 2000 ;39(3):751-757 1235 UI - 16005 AU - Martinez-de la Cruz A AU - Torres-Martinez LM AU - Garcia-Alvarado F AU - Moran E AU - ario-Franco MA AD - Univ Autonoma Nuevo Leon, Div Estudios Super, Fac Ciencias Quim, Monterrey, NL, MexicoUniv San Pablo CEU, Fac Ciencias Expt & Tecn, Madrid 28668, SpainUniv Complutense, Fac Ciencias Quim, Dept Quim Inorgan, E-28040 Madrid, SpainMartinez-de la Cruz, A, Univ Autonoma Nuevo Leon, Div Estudios Super, Fac Ciencias Quim, Apartado Postal 1625, Monterrey, NL, Mexico TI - Sodium ordering in NaxW18O49 AB - Sodium insertion in W18O49 proceeds through the formation of a solid solution for the whole range of intercalant NaxW18O49 with 0 less than or equal to x less than or equal to 1.8. The different features detected in -partial derivative x/partial derivative E vs E plots have been associated with continuous phase transitions. In order to know more about these transitions, several samples NaxW18O49 with compositions around the minimum in the -partial derivative x/partial derivative E curve have been synthesized and then characterized by both X-ray and electron diffraction techniques, An interesting correlation with the electrochemical results has been established. (C) 2000 Academic Press MH - Mexico|Nuevo Leon MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000087054800007 L2 - sodium insertion;order-disorder transitions;insertion in tungsten oxides;LITHIUM; INTERCALATION; SPECTROSCOPY; 2H-LIXTAS2; SYSTEM SO - Journal of Solid State Chemistry 2000 ;151(2):220-224 1236 UI - 15627 AU - Martinez-Madrid M AU - Chan SLI AU - Charles JA AU - Lopez JA AU - Castano V AD - Univ Nacl Autonoma Mexico, Dept Fis Aplicada & Tecnol Avanzada, Inst Fis, Queretaro 76000, MexicoUniv Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, EnglandInst Mexicano Transporte, Queretaro 76700, MexicoMartinez-Madrid, M, Univ Nacl Autonoma Mexico, Dept Fis Aplicada & Tecnol Avanzada, Inst Fis, AP 1-1010, Queretaro 76000, Mexico TI - Effect of grain size and second phase particles on the hydrogen occlusivity of iron and steels AB - The trapping of hydrogen by various interfaces in iron and steels has been studied. The hydrogen content of pure iron specimens was found to depend more on hydrogen than those of low angle, and thus specimens with low angle grain boundaries were less susceptible to hydrogen damage. Inclusions and thermo-mechanical treatments were also significant in determining the hydrogen pick-up in iron. A critical volume fraction of inclusions was detected, below which no hydrogen-induced cracking occurred. Ferrite/pearlite and pearlite/pearlite colony interfaces in steel were found to trap hydrogen, whereas the ferrite/comentite interface within the pearlitic colonies had little effect on the hydrogen occlusivity MH - United Kingdom MH - Mexico|Queretaro PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1432-8917 UR - ISI:000088186400004 L2 - steel;iron alloys;hydrogen;second phase;segregation;grain size;microestructure;modelling;interfacial energy;EMBRITTLEMENT SO - Materials Research Innovations 2000 ;3(5):263-270 1237 UI - 16700 AU - Martinez-Richa A AU - Vera-Graziano R AU - Rivera A AU - Joseph-Nathan P AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Colombia, Dept Quim, Santafe De Bogota, DC, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoMartinez-Richa, A, Univ Guanajuato, Fac Quim, Noria Alta S-N, Guanajuato 36050, Mexico TI - A solid-state C-13 NMR analysis of ambers AB - Colombian copalite samples (found at 73 degrees 5'W 6 degrees 19'N in the Cimitarra quadrangle), and commercial amber samples from Chiapas (Mexico), Dominican Republic and Poland (Baltic) were studied using solid-state C-13 CP-MAS Nuclear Magnetic Resonance (NMR), NMR spectra for Colombian amber are shown and compared to those reported for the resin from the genus of the African species Hymenaea verrucosa and other Hymenaea trees, for which a close resemblance is observed. NMR spectral features of the other studied ambers are also discussed. A physical aging experiment was performed on a Colombian sample at 65 degrees C. Differences in the solid-state NMR and IR spectra are explained in terms of changes in chemical cross-linking, isomerization and morphology. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000083503600039 L2 - amber;high-resolution C-13 nuclear magnetic resonance;physical aging;NUCLEAR MAGNETIC-RESONANCE; NATURAL RESINS; POLYLABDANOID RESINITES; GEOSPHERE; DOMINICAN; FATE; SPECTROSCOPY; MATURATION; ORIGIN SO - Polymer 2000 ;41(2):743-750 1238 UI - 14969 AU - Martinez-Trinidad JF AU - Beltran-Martinez B AU - Ruiz-Shulcloper J AD - Inst Politecn Nacl, Ctr Invest Computac, Mexico City 07738, DF, MexicoBenemerita Univ Autonoma Puebla, Fac Ciencias Computac, Puebla 72570, MexicoUniv Tennessee, Dept Elect & Comp Engn, IRIS Lab, Knoxville, TN 37996, USAMartinez-Trinidad, JF, Inst Politecn Nacl, Ctr Invest Computac, Av Juan de Dios Batiz S-N Esq,Othon de Mendizabal, Mexico City 07738, DF, Mexico TI - A tool to discover the main themes in a Spanish or English document AB - While most work on Knowledge Discovery in databases has been concerned with structured databases, there has been little work on handling the huge amount of information that is available only in unstructured textual form. In this paper a system based on information retrieval and text mining methods is presented. In addition, it is shown how the system analyzes a document containing natural language sentences in order to recognize its main topics or themes. The knowledge base used for the system is conformed by trees of concept. The architecture and the main algorithms of the system are discussed in this work. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic;Operations Research & Management Science U5 - J;Article AV - English IS - 0957-4174 UR - ISI:000165058400007 L2 - text mining;concept trees;text analysis;natural language processing;knowledge discovering SO - Expert Systems with Applications 2000 ;19(4):319-327 1239 UI - 15418 AU - Martinez A AU - Rodriguez ME AU - York SW AU - Preston JF AU - Ingram LO AD - Univ Florida, Dept Microbiol & Cell Sci, Inst Food & Agr Sci, Gainesville, FL 32611, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62191, Morelos, MexicoIngram, LO, Univ Florida, Dept Microbiol & Cell Sci, Inst Food & Agr Sci, POB 110700, Gainesville, FL 32611 USA TI - Effects of Ca(OH)(2) treatments ("overliming") on the composition and toxicity of bagasse hemicellulose hydrolysates AB - Hemicellulose syrups from dilute sulfuric acid hydrolysates of hemicellulose contain inhibitors that prevent efficient fermentation by yeast or bacteria. It is well known that the toxicity of these hydrolysate syrups can be ameliorated by optimized "overliming" with Ca(OH)(2). We have investigated the optimization of overliming treatments for sugar cane bagasse hydrolysates (primarily pentose sugars) using recombinant Escherichia coli LY01 as the biocatalyst. A comparison of composition before and after optimal overliming revealed a substantial reduction in furfural, hydroxymethylfurfural, and three unidentified high-performance liquid chromatography (HPLC) peaks. Organic acids (acetic, formic, levulinic) were not affected. Similar changes have been reported after overliming of spruce hemicellulose hydrolysates (Larsson et al., 1999). Our studies further demonstrated that the extent of furan reduction correlated with increasing fermentability. However, furan reduction was not the sole cause for reduced toxicity. After optimal overliming, bagasse hydrolysate was rapidly and efficiently fermented (>90% yield) by LY01. During these studies, titration, and conductivity were found to be in excellent agreement as methods to estimate sulfuric acid content. Titration was also found to provide an estimate of total organic acids in hydrolysate, which agreed well with the sum of acetic, levulinic, and formic acids obtained by HPLC. Titration of acids, measurement of pH before and after treatment, and furan analyses are proposed as relatively simple methods to monitor the reproducibility of hydrolysate preparations and the effectiveness of overliming treatments. (C) 2000 John Wiley & Sons, Inc MH - USA MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 30 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000088838100007 L2 - ethanol;fermentation;lignin;phenolic compounds;furfural;hydroxymethylfurfural;lignocellulose;biomass;hemicellulose;Escherichia coli;xylose;bagasse;hemicellulose hydrolysate;calcium hydroxide;Ca(OH)(2) treatment;overliming;ETHANOLOGENIC ESCHERICHIA-COLI; FUEL ETHANOL; SACCHAROMYCES-CEREVISIAE; FERMENTATION INHIBITORS; XYLOSE FERMENTATION; CELLULOSIC BIOMASS; PICHIA-STIPITIS; BATCH CULTURE; GROWTH; ACID SO - Biotechnology and Bioengineering 2000 ;69(5):526-536 1240 UI - 15519 AU - Martinez A AU - Rodriguez ME AU - York SW AU - Preston JF AU - Ingram LO AD - Univ Florida, Inst Food & Agr Sci, Dept Microbiol & Cell Sci, Gainesville, FL 32611, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoIngram, LO, Univ Florida, Inst Food & Agr Sci, Dept Microbiol & Cell Sci, Gainesville, FL 32611 USA TI - Use of UV absorbance to monitor furans in dilute acid hydrolysates of biomass AB - A simple method based on UV spectra was developed for the estimation of total furans (furfural and hydroxymethylfurfural) in hemicellulose hydrolysates. UV spectra of hemicellulose hydrolysate contained a single dominant peak at around 278 nm. Approximately two-thirds of this peak can be attributed to furan absorbance (furfural and hydroxymethylfurfural). At 284 nn, both furfural and hydroxymethylfurfural have equal absorbance on a weight basis. A comparison of HPLC determinations for different samples of hydrolysate was used to develop a simple equation that allows the accurate prediction of total furans based on the difference in absorbance at 284 and 320 nm. This method may prove useful for quality control applications during the production of biomass syrups using a dilute acid hydrolysis process and during treatments for the amelioration of toxins. Although furans represent only a portion of the toxins present in hemicellulose hydrolysates, the abundance of furans appears to serve as a useful marker to predict relative toxicity MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 8756-7938 UR - ISI:000088710200017 L2 - FUEL ETHANOL-PRODUCTION; ESCHERICHIA-COLI; SACCHAROMYCES-CEREVISIAE; BATCH CULTURE; FERMENTATION; CONVERSION; SUGARS; GROWTH; KO11 SO - Biotechnology Progress 2000 ;16(4):637-641 1241 UI - 15724 AU - Martinez AJ AU - Manolache S AU - Gonzalez V AU - Young RA AU - Denes F AD - Univ Wisconsin, Ctr Plasma Aided Mfg, Madison, WI 53706, USAUniv Wisconsin, Dept FEM, Madison, WI 53706, USAUniv Guadalajara, Dept Chem Engn, Guadalajara 44430, Jalisco, MexicoDenes, F, Univ Wisconsin, Ctr Plasma Aided Mfg, Madison, WI 53706, USA TI - Immobilized biomolecules on plasma functionalized cellophane. I. Covalently attached alpha-chymotrypsin AB - Surface: morphology changes of hydrazine-RF-plasma-exposed cellophane surfaces were monitored under 40 Hz and 13.56 MHz CW and pulsed discharge environments and the immobilization of alpha-chymotrypsin onto plasma-modified substrates was studied. It has bran shown, using SEM and AFM techniques, that significantly different cellophane topographies are generated under differ ent frequency and pulsing parameter conditions. ESCA and ATR-FTIR analyses of plasma-modified surfaces indicated the presence of primary amide and primary amine Functionalities. It was found that the relative ratios of crystalline vs amorphous zones of the nascent surface layers can also be controlled by properly selected plasma parameters, including the duty cycles of pulsed plasma environments. Enzyme immobilization reactions with alpha-chymotrypsin were accomplished both from oxygen-plasma-generated carbonyl and hydrazine-plasma-created primary amine functionalities by anchoring the biomolecules tither directly to the cellophane surface or by involving spacer molecules. It was found with the cellulose substrates that fairly good enzyme activity was retained without the necessity of intercalated spacer chains. It appears that the ability of the cellulose substrate to swell in the aqueous environment allows sufficient freedom of mobility for the immobilized enzyme to retain a significant part of its activity on the cellulose. However, the activities both of the free enzyme in the presence of cellophane, and that of the immobilized enzyme molecules are significantly diminished in comparison to the activity of the free enzyme, as a result of the incorporation of these molecules into the swollen network. Potential applications of immobilized enzymes from cold-plasma-functionalized surfaces are discussed MH - Mexico|Jalisco MH - USA PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Biomedical;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 0920-5063 UR - ISI:000087993600007 L2 - hydrazine plasma;functionalized surface;spacer alpha-chymotrypsin;enzyme immobilization;enzyme activity;surface morphology;swollen state;POLYMERIZATION SO - Journal of Biomaterials Science-Polymer Edition 2000 ;11(4):415-438 1242 UI - 16539 AU - Martinez AM AU - Goulson D AU - Chapmann JW AU - Caballero P AU - Cave RD AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoUniv Southampton, Southampton SO16 7PX, Hants, EnglandUniv Publ Navarra, Dept Agr Prod, Pamplona, SpainEscuela Agr Panamer, El Zamorano, HondurasMartinez, AM, ECOSUR, AP 36, Tapachula 30700, Chiapas, Mexico TI - Is it feasible to use optical brightener technology with a Baculovirus bioinsecticide for resource-poor maize farmers in mesoamerica? AB - Stilbene-derived optical brighteners greatly enhance the infectivity of a number of baculoviruses. This technology has been patented for use with insect pathogenic viruses in the United States and Canada. A baculovirus is currently being tested for its potential as a biological insecticide of Spodoptera frugiperda (Lepidoptera: Noctuidae), the principal insect pest of maize in Mesoamerica. A multiply embedded nucleopolyhedrovirus isolate originally from Nicaragua was bioassayed alone and in the presence of the optical brightener Tinopal LPW (1%), using second instar S. frugiperda larvae. The LC50 value of the virus alone was calculated at 82.1 polyhedral inclusion bodies (PIBs)/mm(2) of diet compared with 0.71 PIBs/mm(2) in the presence of Tinopal LPW. In contrast to other studies, the mean time to death of larvae exposed to virus and Tinopal LPW was significantly extended compared to larvae inoculated with virus alone. Analysis of the results of eight independent held trials in Mexico and Honduras revealed a significant positive relationship between log virus dose and percentage mortality observed in S. frugiperda larvae. Virus-induced mortality was approximately 50% at the highest application rate tested: 1000 larval equivalents (LE) of virus/ha. When the impact of parasitism was taken into account, larval mortality increased to 45.0-90.7% in plots treated with virus at 250 LE/ha or more. A cost analysis indicated that approximately 60% pest control can be achieved as a conservative estimate with virus application and the action of parasitoids for the price of a chemical insecticide. Formulating the virus with an optical brightener appears to be an attractive option based on laboratory findings but requires held testing. The use of optical brightener technology will probably be feasible for maize growers in Mesoamerica only if it is highly effective at very low concentrations (<0.1%) or the volume of the virus application can be reduced. (C) 2000 Academic Press MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 19 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000085260900008 L2 - Spodoptera frugiperda;nuclear polyhedrosis virus;synergism;Tinopal LPW;cost analysis;NUCLEAR POLYHEDROSIS-VIRUS; GYPSY-MOTH LEPIDOPTERA; FALL ARMYWORM LEPIDOPTERA; FLUORESCENT BRIGHTENER; LYMANTRIIDAE BACULOVIRUS; TRICHOPLUSIA NI; NOCTUIDAE; ENHANCEMENT; INFECTIVITY; PROTECTANTS SO - Biological Control 2000 ;17(2):174-181 1243 UI - 16405 AU - Martinez AP AU - Rojas HP AU - Aguero DO AU - Hechavarria AA AU - Romo SR AD - ICIMAF, La Habana 10400, CubaUNAM, FES Cuautitlan, Ctr Invest Teor, Mexico City, DF, MexicoInst Politecn Nacl, CINVESTAV, Mexico City 07000, DF, MexicoMartinez, AP, ICIMAF, Calle E 309, La Habana 10400, Cuba TI - Neutrinos in extremely strong magnetic fields AB - We compute the dispersion curves for neutrinos propagating in a very dense electroweak plasma, in magnetic fields of order B less than or equal to M-W(2)/e. The neutrino self-energy is calculated in the one-loop approximation. The dispersion equation is solved for motion parallel and perpendicular to the external magnetic field. We obtain an effective neutrino mass which increases with the magnetic field, up to values B where threshold energy for creation of W+/- pairs (out from the thermal background) is reached MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000085748300004 L2 - DENSE MATTER; DISPERSION; NUCLEOSYNTHESIS; CONDENSATION; PLASMA SO - International Journal of Modern Physics A 2000 ;15(4):523-534 1244 UI - 15204 AU - Martinez G AU - Aguilar R AU - Hernandez PH AU - Cocoletzi GH AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAMartinez, G, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Excitons in GaAs nanocavities under the influence of perpendicular magnetic fields AB - Studies are presented on the optical response of magnetoexcitons in GaAs microcavities with an external magnetic B-p held applied in the perpendicular configuration. Incident light of definite polarization is considered in order to calculate reflectivities with the same polarization and the conversion from one to the other polarization. Results show. that the reflectivity minimum of light with s polarization for light incident with the same polarization splits into two minima as produced by the strong interaction of the exciton-polariton states with the nanocavity modes and assisted by the B-p field. In contrast, this splitting is inhibited by the applied field when light is incident with p-polarization. Comparisons with experimental data show good qualitative agreement MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000089413500019 L2 - SEMICONDUCTOR SUPERLATTICES; QUANTUM WELLS SO - Physical Review B 2000 ;62(11):6916-6919 1245 UI - 16594 AU - Martinez JM AU - Hernandez-Cobos J AU - Saint-Martin H AU - Pappalardo RR AU - Ortega-Blake I AU - Marcos ES AD - Univ Sevilla, Dept Quim Fis, E-41012 Seville, SpainUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoMartinez, JM, Univ Sevilla, Dept Quim Fis, E-41012 Seville, Spain TI - Coupling a polarizable water model to the hydrated ion-water interaction potential: A test on the Cr3+ hydration AB - A strategy to build interaction potentials for describing ionic hydration of highly charged monoatomic cations by computer simulations, including the polarizable character of the solvent, is proposed. The method is based on the hydrated ion concept that has been previously tested for the case of Cr3+ aqueous solutions [J. Phys. Chem. 100, 11748 (1996)]. In the present work, the interaction potential of [Cr(H2O6)](3+) with water has been adapted to a water model that accounts for the polarizable character of the solvent by means of a mobile charge harmonic oscillator representation (MCHO model) [J. Chem. Phys. 93, 6448 (1990)]. Monte Carlo simulations of the Cr3+ hexahydrate plus 512 water molecules have been performed to study the energetics and structure of the ionic solution. The results show a significant improvement in the estimate of the hydration enthalpy [Delta H-hydr(Cr3+)=-1109.6 +/- 70 kcal/mol] that now matches the experimental value within the uncertainty of this magnitude. The use of the polarizable water model lowers by similar to 140 kcal/mol the statistical estimation of the [Cr(H2O6)](3+) hydration enthalpy compared to the nonpolarizable model. (-573 kcal/mol for the polarizable model vs -714 kcal/mol for the nonpolarizable one.) This improvement reflects a more accurate treatment of the many-body nonadditive effects. (C) 2000 American Institute of Physics. [S0021-9606(00)50804-6] MH - Mexico|Morelos MH - Spain PB - WOODBURY: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 30 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000084940100034 L2 - MONTE-CARLO SIMULATIONS; MOLECULAR-DYNAMICS SIMULATIONS; AQUEOUS-SOLUTIONS; FREE-ENERGY; 2ND-SPHERE HYDRATION; CU-2+ CLUSTERS; LIQUID WATER; SOLVATION; NONADDITIVITY; SHELL SO - Journal of Chemical Physics 2000 ;112(5):2339-2347 1246 UI - 15113 AU - Martinez MJ AU - de Aluja AS AU - Gemmell M AD - Univ Nacl Autonoma Mexico, Dept Med Prevent & Salud Publ, Fac Med Vet & Zootecnia, Mexico City 04510, DF, MexicoUniv Cambridge, Dept Clin Vet Med, Cambridge CB3 0ES, EnglandMartinez, MJ, Univ Nacl Autonoma Mexico, Dept Med Prevent & Salud Publ, Fac Med Vet & Zootecnia, Av Univ 3000, Mexico City 04510, DF, Mexico TI - Failure to incriminate domestic flies (Diptera : Muscidae) as mechanical vectors of Taenia eggs (Cyclophyllidea : Taeniidae) in rural Mexico AB - Flies caught in homes in a rural village in Guerrero, Mexico, between November 1994 and August 1995 were assessed for their role in the transmission of Taenia solium L. Most (99%) of the trapped flies were Musca domestica L. None of the 1,187 guts or 1,080 legs of the flies contained T. solium eggs. Pigs roam freely in this village consuming human fecal material immediately after defecation, thereby limiting fly contact with T. solium eggs MH - United Kingdom MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000089625300001 L2 - flies;Taenia solium;Musca domestica;vectors;Mexico;TRANSMISSION; CYSTICERCOSIS; EPIDEMIOLOGY SO - Journal of Medical Entomology 2000 ;37(4):489-491 1247 UI - 14238 AU - Martinez RV AU - Diaz MI AU - Hernandez GP AU - Ramirez AMD AU - Salazar LA AU - Cabre F AU - Lopez-Munoz FJ AD - CINVESTAV, IPN, Dept Farmacobiol, Mexico City 14000, DF, MexicoUAM, Div Cs Biol & Salud, Dept Sistemas Biol, Mexico City, DF, MexicoLabs Menarini SA, Dept I&D, Barcelona, SpainMartinez, RV, CINVESTAV, IPN, Dept Farmacobiol, Apartado Postal 22026, Mexico City 14000, DF, Mexico TI - Role of COX-1-and COX-2-synthesized prostaglandins in a rat model of arthritic pain AB - An appropriate animal model for investigation of antiinflammatory analgesic effects of NSAIDs is the pain-induced functional impairment model in the rat (PIFIR model). The PIFIR model provides a model of inflammatory and chronic pain similar to that of clinical gout. We investigated the possible role of peripheral prostaglandins synthesized by COX-1 and COX-2 in arthritic pain produced by uric acid in the rat PIFIR model. For this purpose, the antinociceptive effects of indomethacin, a nonselective COX-1/COX-2 inhibitor, and those of SC-560 and MK-966 (Vioxx), selective inhibitors of COX-1 and COX-2, respectively, on the functional impairment induced by intraarticular (i.a.) injection of uric acid into the knee joint of the right hindlimb were compared. The antinociceptive efficacy was determined from the area under the curve (AUC) values obtained from the time course of the antinociceptive effect. Animals received vehicle, 100 mug indomethacin, 100 mug SC-560, or 50 mug of MK-966 (these drug doses were selected from dose-response curves of each drug in previous experiments) 20 min before uric acid and the ability of the rat to use the injured hindlimb was recorded with a computerized system. The effect produced by each treatment was compared with that observed after the compounds were administered in the left hindlimb, i.e., contralateral administration. The results showed that all three compounds significantly inhibited uric acid-induced dysfunction of the right hindlimb (control = 64 +/- 8 au; indomethacin = 391 +/- 30 au; MK-966 = 368 +/- 17 au; SC-560 = 445 +/- 25 au, ANOVA, Dunnett's test, P < 0.01). In addition, the results using contralateral administration suggest that the analgesic effect was due to inhibition of locally produced COX-1 and COX-2 and, therefore, that no central mechanisms were involved. Taken together, the present data using the pain-induced functional impairment model in rats support the idea that both COX isoforms (1 and 2) contribute to the local inflammatory response in the model and that they may have a role in the maintenance of physiological homeostasis. They might also suggest that the therapeutic benefits of NSAIDs are mainly due to inhibition of both COX isoforms. (C) 2001 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0272-4391 UR - ISI:000167166000006 L2 - inflammatory pain;cyclooxygenase;prostaglandins;PIFIR model;nociception;INDUCED FUNCTIONAL IMPAIRMENT; NONSTEROIDAL ANTIINFLAMMATORY DRUGS; SELECTIVE-INHIBITION; NITRIC-OXIDE; CYCLOOXYGENASE-2; INFLAMMATION; CAFFEINE; ASPIRIN; KETOROLAC; COX-2 SO - Drug Development Research 2000 ;51(4):253-259 1248 UI - 16143 AU - Martiny B AU - Martinez-Serrano RG AU - Moran-Zenteno DJ AU - ias-Romo C AU - Ayuso RA AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUS Geol Survey, Natl Ctr, Reston, VA 20192, USAMartiny, B, Univ Nacl Autonoma Mexico, Inst Geol, Apdo Postal 70-296,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Stratigraphy, geochemistry and tectonic significance of the Oligocene magmatic rocks of western Oaxaca, southern Mexico AB - In western Oaxaca, Tertiary magmatic activity is represented by extensive plutons along the continental margin and volcanic sequences in the inland region. K-Ar age determinations reported previously and in the present work indicate that these rocks correspond to a relatively broad are in this region that was active mainly during the Oligocene (similar to 35 to similar to 25 Ma). In the northern sector of western Oaxaca (Huajuapan-Monte Verde-Yanhuitlan), the volcanic suite comprises principally basaltic andesite to andesitic lavas, overlying minor silicic to intermediate volcaniclastic rocks (epiclastic deposits, ash fall tuffs, ignimbrites) that were deposited in a lacustrine-fluvial environment. The southern sector of the volcanic zone includes the Tlaxiaco-Laguna de Guadalupe region and consists of intermediate to silicic pyroclastic and epiclastic deposits, with silicic ash fall tuffs and ignimbrites. In both sectors, numerous andesitic to dacitic hypabyssal intrusions (stocks and dikes) are emplaced at different levels of the sequence. The granitoids of the coastal plutonic belt are generally more differentiated than the volcanic rocks that predominate in the northern sector and vary in composition from granite to granodiorite. The studied rocks show large-ion lithophile element (LILE) enrichment (K, Rb, Ba, Th) relative to high-field-strength (HFS) elements (Nb, Ti, Zr) that is characteristic of subduction-related magmatic rocks. On chondrite-normalized rare earth element diagrams, these samples display light rare earth element enrichment (LREE) and a flat pattern for the heavy rare earth elements (HREE). In spite of the contrasting degree of differentiation between the coastal plutons and inland volcanic rocks, there is a relatively small variation in the isotopic composition of these two suites. Initial Sr-87/Sr-86 ratios obtained and reported previously for Tertiary plutonic rocks of western Oaxaca range from 0.7042 to 0.7054 and epsilon Nd values, from -3.0 to +2.4, and for the volcanic rocks, from 0.7042 to 0.7046 and 0 to +2.6. The range of these isotope ratios and those reported for the basement rocks in this region suggest a relatively low degree of old crustal involvement for most of the studied rocks. The Pb isotopic compositions of the Tertiary magmatic rocks also show a narrow range [(Pb-206/Pb-204) = 18.67-18.75; (Pb-207/Pb-204) = 15.59-15.62; (Pb-208/Pb-204)= 38.44-38.59], suggesting a similar source region for the volcanic and plutonic rocks. Trace elements and isotopic compositions suggest a mantle source in the subcontinental lithosphere that has been enriched by a subduction component. General tectonic features in this region indicate a more active rate of transtensional deformation for the inland volcanic region than along the coastal margin during the main events of Oligocene magmatism. The lower degree of differentiation of the inland volcanic sequences, particularly the upper unit of the northern sector, compared to the plutons of the coastal margin, suggests that the differentiation of the Tertiary magmas in southern Mexico was controlled to a great extent by the characteristics of the different strain domains. (C) 1000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700005 L2 - arc magmatism;geochemistry;Nd-Sr-Pb isotope ratios;Oaxaca;Mexico;Tertiary;transtension;TRACE-ELEMENT CONSTRAINTS; VOLCANIC-ROCKS; POLYGENETIC VOLCANISM; SOUTHWESTERN MEXICO; EVOLUTION; SUBDUCTION; SR; EXTENSION; TERRANES; ORIGIN SO - Tectonophysics 2000 ;318(1-4):71-98 1249 UI - 15312 AU - Marvaldi AE AU - Morrone JJ AD - CRIYCT, IADIZA, RA-5500 Mendoza, ArgentinaNatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoMarvaldi, AE, Harvard Univ, Museum Comparat Zool, 26 Oxford St, Cambridge, MA 02138 USA TI - Phylogenetic systematics of weevils (Coleoptera : Curculionoidea): A reappraisal based on larval and adult morphology AB - A cladistic analysis of Curculionoidea based on 100 morphological characters (28 from larvae and 72 from adults) is presented. The 13 terminal taxa correspond to 7 extant families of Curculionoidea of which the largest, Curculionidae, is represented by 7 smaller units. The terminal units art: defined by morphological autapomorphies taken from published information on larvae and adults. The chrysomeloid Palophaginae was used as outgroup. The cladogram shows that there is a basal dichotomy in the superfamily, Nemonychidae-Anthribidae being the monophyletic sister taxon to the remaining families, which follow the sequence Belidae, Attelabidae, Caridae, Brentidae, and Curculionidae. The units of Curculionidae are related as follows: Ithycerinae, Microcerinae, Brachycerinae, Ocladiinae, Dryophthorinae, Erirhininae, and 'Curculionidae s.str.'. Important areas where further work should be directed are: the sister group relationship of Nemonychidae and Anthribidae, and the recognition of monophyletic subfamilies within the Curculionidae s.str, as well as the placement of Platypodinae MH - Argentina MH - USA MH - Mexico|Distrito Federal PB - STENSTRUP: APOLLO BOOKS RP - NOT IN FILE U3 - TC 7 U4 - Evolutionary Biology;Entomology U5 - J;Article AV - English IS - 0013-8711 UR - ISI:000089191600003 L2 - KEY SO - Insect Systematics & Evolution 2000 ;31(1):43-58 1250 UI - 15493 AU - Mascaro M AU - Seed R AD - Univ Wales Bangor, Sch Ocean Sci, Menai Bridge LL59 5EY, Anglesey, WalesMascaro, M, UNAM, Fac Ciencias, Dept Biol, Lab Biol Marina Expt, Apdo Post 69,Cd Carmel, Campeche, Mexico TI - Foraging behavior of Carcinus maenas (L.): Comparisons of size-selective predation on four species of bivalve prey AB - Experiments were designed to investigate size-selective predation by medium (40-55 mm carapace width) and large (55-70 mm) Carcinus maenas when feeding on four bivalves of contrasting shell morphologies, mussel, Mytilus edulis, flat oyster Ostrea edulis, Pacific oyster Crassostrea gigas, and edible cockle Cerastoderma edule. Medium-sized crabs preferred mussels 5-15 mm shell length (maximum shell dimension) and cockles 5-10 mm long, whereas large crabs preferred mussels 15-25 mm and cockles 10-20 mm long. Generally, no preference was shown for any particular size of either species of oyster. Comparisons amongst the preferred size ranges of prey showed that crab preference for a particular size range of prey was more strongly related to the minimum than to the maximum shell dimension, and that the minimum shell dimension was always equivalent to, or smaller than: the maximum cross section of the crabs' chelae. The size ranges of M. edulis and C. edule selected by C. maenas either clearly corresponded to, or were slightly smaller than, the size ranges of prey with the highest profitability (= dry weight consumed per unit of handling time). Profitability values of M. edulis and C. edule, however, showed considerable scatter; whereas those of O. edulis and C. gigas were even more variable. This variation seems to be the result of behavioral strategies by which crabs attack all encountered prey but reject those that remain unbroken after a certain number of opening attempts. Our results emphasize the mechanistic nature of size-selective feeding in C. maenas, and suggest that the differences in the observed patterns of size-selection were mainly determined by the contrasting morphological features of the bivalve shells, and the way these features influence the vulnerability of prey to crab predation MH - Mexico|Campeche MH - United Kingdom PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 22 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000088636000045 L2 - foraging behavior;Carcinus maenas;size-selection;bivalve;CALLINECTES-SAPIDUS RATHBUN; BLUE-CRAB; SHORE CRAB; MUSSELS; TIME; DIET SO - Journal of Shellfish Research 2000 ;19(1):283-291 1251 UI - 15494 AU - Mascaro M AU - Seed R AD - Univ Wales Bangor, Sch Ocean Sci, Menai Bridge LL59 5EY, Anglesey, WalesMascaro, M, UNAM, Fac Ciencias, Dept Biol, Lab Biol Marina Expt, Apdo Post 69,Cd Carmen, Campeche, Mexico TI - Foraging behavior of Carcinus maenas (L.): Species-selective predation among four bivalve prey AB - Species-selective predation by medium (40-50 mm carapace width) and large (55-70 mm) Carcinus maenas was investigated by presenting individual crabs with paired combinations of mussels Mytilus edulis, flat oysters Ostrea edulis, Pacific oysters Crassostrea gigas, and cockles Cerastoderma edule in various proportions. When offered mussels and either oyster species simultaneously, both size categories of crabs consistently selected mussels, and food choice was independent of prey relative abundance. By contrast, C. maenas selected mussels and cockles as expected by the frequency in which each size category of crab encountered the preferred size ranges of prey. Crab preference clearly paralleled the rank order of prey profitability, which, in turn, was mainly determined by prey biomass, suggesting that active selection takes place at some point of the predation cycle. Decisions by crabs on whether to attack oysters and mussels initially were not influenced by the flavor or odor of their flesh. Both mussel and oyster filtrates had a similar reinforcing effect on crab perseverance to open prey. However, species-related preferences exhibited by crabs feeding at or near the optimal size suggest that foraging decisions are partly based on evaluations of over-all prey shape and volume, and that the minimum dimension of the shell constitutes an important feature that crabs recognize and associate with prey value MH - Mexico|Campeche MH - United Kingdom PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 11 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000088636000046 L2 - foraging behavior;Carcinus maenas;species-selection;bivalve;CRAB CALLINECTES-SAPIDUS; SIZE-SELECTION; SHORE CRAB; MUSSELS; DIET; PREFERENCES; MECHANISMS; FEATURES; SHELLS; TIME SO - Journal of Shellfish Research 2000 ;19(1):293-300 1252 UI - 16536 AU - Mashhoon B AU - McClune JC AU - Quevedo H AD - Univ Missouri, Dept Phys & Astron, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMashhoon, B, Univ Missouri, Dept Phys & Astron, Columbia, MO 65211, USA TI - On a class of rotating gravitational waves AB - A class of solutions of the gravitational field equations describing vacuum spacetimes outside rotating cylindrical sources is presented. The spacetime metric for this class is given by equation (35); to render this metric explicit, one must solve the nonlinear differential equation (31). A subclass of these solutions could correspond to the exterior gravitational fields of rotating cylindrical systems that emit gravitational radiation. This class has a special solution-corresponding to the exact solution (32) of equation (31)-in common with the Robinson-Trautman gravitational wave spacetimes, namely, the Siklos solution. The properties of rotating gravitational waves are briefly investigated. In particular, we discuss the energy density of these waves using the gravitational stress-energy tensor MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000085297800004 SO - Classical and Quantum Gravity 2000 ;17(3):533-549 1253 UI - 16587 AU - Mason KO AU - Carrera FJ AU - Hasinger G AU - Andernach H AU - ragon-Salamanca A AU - Barcons X AU - Bower R AU - Brandt WN AU - Branduardi-Raymont G AU - Burgos-Martin J AU - Cabrera-Guerra F AU - Carballo R AU - Castander F AU - Ellis RS AU - Gonzalez-Serrano JI AU - Martinez-Gonzalez E AU - Martin-Mirones JM AU - McMahon RG AU - Mittaz JPD AU - Nicholson KL AU - Page MJ AU - Perez-Fournon I AU - Puchnarewicz EM AU - Romero-Colmenero E AU - Schwope AD AU - Vila B AU - Watson MG AU - Wonnacott D AD - Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, EnglandUniv Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, SpainAstrophys Inst Potsdam, D-14482 Potsdam, GermanyIFUG, Dept Astron, Guanajuato, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Durham, Dept Phys, Durham DH1 3LE, EnglandPenn State Univ, Dept Astron, Davey Lab 525, University Pk, PA 16802, USAInst Astrofis Canarias, Tenerife, SpainUniv Cantabria, Dept Fis Moderna, E-39005 Santander, SpainUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandMason, KO, Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England TI - The ROSAT international X-ray/Optical survey (RIXOS): Source catalogue AB - We describe the ROSAT International X-ray/Optical Survey (RIXOS), a medium-sensitivity survey and optical identification of X-ray sources discovered in ROSAT high Galactic latitude fields (\ b \> 28 degrees) and observed with the Position Sensitive Proportional Counter (PSPC) detector. The survey made use of the central 17 arcmin of each ROSAT field. A flux limit of 3x10(-14) erg cm(-2) s(-1) (0.5-2 keV) was adopted for the survey, and a minimum exposure time of 8000 s was required for qualifying ROSAT observations. X-ray sources in the survey are therefore substantially above the detection threshold of each field used, and many contain enough counts to allow the X-ray spectral slope to be estimated. Spectroscopic observations of potential counterparts were obtained of all sources down to the survey limit in 64 fields, totalling a sky area of 15.77 deg(2). Positive optical identifications are made for 94 per cent of the 296 sources thus examined. A further 18 fields (4.44 deg(2)), containing 105 sources above the 3x10(-14) erg cm(-2) s(-1) survey limit, are completely optically identified to a higher flux of 8x10(-14) erg cm(-2) s(-1) (0.5-2 keV). Optical spectroscopic data are supplemented by deep CCD imaging of many sources to reveal the morphology of the optical counterparts, and objects too faint to register on Sky Survey plates. The faintest optical counterparts have R similar to 22. This paper describes the survey method, and presents a catalogue of the RIXOS sources and their optical identifications. Finding charts based on Sky Survey data are given for each source, supplemented by CCD imaging where necessary MH - United Kingdom MH - Germany MH - Mexico|Guanajuato MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 51 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000084867400004 L2 - surveys;stars : late-type;galaxies : active;galaxies : clusters : general;quasars : general;X-rays : general;ACTIVE GALACTIC NUCLEI; N-LOG-S; RAY-PROPERTIES; EVOLUTION; DEEP; GALAXIES; EMISSION; CLUSTERS; CONTINUA; ORIGIN SO - Monthly Notices of the Royal Astronomical Society 2000 ;311(3):456-484 1254 UI - 15082 AU - Masuda CA AU - Ramirez J AU - Pena A AU - Montero-Lomeli M AD - Univ Fed Rio de Janeiro, CCS, ICB, Dept Bioquim Med, BR-21941590 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, IFC, Dept Mol Genet, Mexico City 04510, DF, MexicoMontero-Lomeli, M, Univ Fed Rio de Janeiro, CCS, ICB, Dept Bioquim Med, CP 68041, BR-21941590 Rio De Janeiro, Brazil TI - Regulation of monovalent ion homeostasis and pH by the Ser-Thr protein phosphatase SIT4 in Saccharomyces cerevisiae AB - A gene, SIT4, was identified as corresponding to a serine/threonine protein phosphatase and when overexpressed confers lithium tolerance in galactose medium to the budding yeast Saccharomyces cerevisiae, This gene has been previously identified as a regulator of the cell cycle and involved in nitrogen sensing. It is shown that the transcription levels of SIT4 are induced by low concentrations of Li+ in a time-dependent manner. Na+ and K+ at high concentrations, but not sorbitol, also induce transcription. As a response to Na+ or Li+ stress, yeast cells lower the intracellular K+ content. This effect is enhanced in cells overexpressing SIT4, which also increase Rb-86 efflux after the addition of Na+ or Lit to the extracellular medium. Another feature of SIT4-overexpressing cells is that they maintain a more alkaline pH of 6.64 compared with 6.17 in the wild type cells, It has been proposed that the main pathway of salt tolerance in yeast is mediated by a P-type ATPase, encoded by PMR2A/ENA1. However, our results show that in a sit4 strain, expression of ENA1 is still induced by mono valent cations, and overexpression of SIT4 does not alter the amount of ENA1 transcript. These results show that SIT4 acts in a parallel pathway not involving induction of transcription of ENA1 and suggest a novel function for SIT4 in response to salt stress MH - Brazil MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000089762700033 L2 - YEAST PLASMA-MEMBRANE; SALT TOLERANCE; TRANSDUCTION PATHWAYS; NHA1 ANTIPORTER; TOR PROTEINS; GENE; SODIUM; TRANSPORT; GLYCEROL; EFFLUX SO - Journal of Biological Chemistry 2000 ;275(40):30957-30961 1255 UI - 15297 AU - Mathew X AU - Enriquez JP AU - Sebastian PJ AU - Pattabi M AU - Sanchez-Juarez A AU - Campos J AU - McClure JC AU - Singh VP AD - UNAM, Ctr Invest Energia, Solar Mat Dept, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoUniv Texas, Dept Met & Mat Engn, El Paso, TX 79968, USAUniv Kentucky, Dept Elect & Comp Engn, Lexington, KY, USAMathew, X, UNAM, Ctr Invest Energia, Solar Mat Dept, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Charge transport mechanism in a typical Au/CdTe Schottky diode AB - The charge transport mechanism in a typical-Au/CdTe Schottky diode has been investigated. Evidence for different types of charge transport at different temperature regions has been observed. The dominant transport mechanism in the 100-300K region is identified as the Poole-Frenkel type. The activation energy of the trap level detected in the 100-300K temperature range shows a voltage dependence. The transport mechanism changes ata characteristic temperature of about 270 K. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000089095600007 L2 - CdTe;electrodeposition;I-V;Poole-Frenkel conduction;Schottky conduction;CDTE THIN-FILMS; ELECTRODEPOSITED CDTE; SOLAR-CELLS; LIMITED CONDUCTION; OPTICAL-PROPERTIES; SPACE; FOIL SO - Solar Energy Materials and Solar Cells 2000 ;63(4):355-365 1256 UI - 15265 AU - Mathur P AU - Payra P AU - Ghose S AU - Hossain MM AU - Satyanarayana CVV AU - Chicote FO AU - Chadha RK AD - Indian Inst Technol, Dept Chem, Bombay 400076, Maharashtra, IndiaIndian Inst Technol, Reg Sophisticated Instrumentat Ctr, Bombay 400076, Maharashtra, IndiaInst Technol Tijuana BC, Grad Ctr, Mexico City 22000, DF, MexicoMathur, P, Indian Inst Technol, Dept Chem, Bombay 400076, Maharashtra, India TI - Synthesis and characterisation of [Fe2M3(mu(4)-E)(mu(3)-E ')(CO)(17)] and [Os-3(mu(3)-E)(mu(3)-E ')(CO)(9)] (M = Os or Ru; E = S, Se, Te; E ' = Se, Te) AB - A set of new chalcogen-bridged mixed metal clusters [Fe2Os3(mu(4)-E)(mu(3)-E')(CO)(17)] (2, EE' = SeTe; 3, EE' = STe; 4, EE' = Se-2; 5 EE' = SSe) and [Fe2Ru3(mu(4)-E)(mu(3)-E')(CO)(17)] (12, EE' = SeTe; 13, EE' = STe; 14, EE' = Se-2; 15, EE' = SSe) has been synthesised by facile methods. Thermolysis or photolysis of compounds 2, 3 and 5 afforded the new triosmium mixed chalcogenide clusters [Os-3(mu(3)-E)(mu(3)-E)(CO)(9)] (7, EE' = SeTe; 8, EE' = STe; 10, EE' = SSe). All new compounds were characterised by IR and H-1-, Se-77- and Te-125-NMR spectroscopy. Clusters 8, 9 and 12 were structurally characterised by single crystal X-ray diffraction methods. (C) 2000 Published by Elsevier Science S.A. All rights reserved MH - India MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000089316800012 L2 - iran;ruthenium;osmium;chalcogens;clusters;NONLINEAR-OPTICAL PROPERTIES; CHALCOGEN CARBONYL-COMPOUNDS; ELECTRON-RICH CLUSTER; MIXED-METAL CLUSTERS; REACTIVITY; LIGANDS; CRYSTAL; CATALYSIS; REDUCTION; COMPLEXES SO - Journal of Organometallic Chemistry 2000 ;606(2):176-182 1257 UI - 14794 AU - Matsuura T AU - Burgess DL AU - Yamagata T AU - Rasmussen A AU - Grewal RP AU - Watase K AU - Tsuji K AU - Khajavi M AU - McCall A AU - Davis CF AU - Yescas P AU - Zu L AU - Pulst SM AU - Alonso E AU - Noebels JL AU - Nelson DL AU - Zoghbi HY AU - Ashizawa T AD - Baylor Coll Med, Houston, TX 77030, USAInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoJFK Med Ctr, New Jersey Neurosci Inst, Edison, NJ, USACedars Sinai Med Ctr, Los Angeles, CA 90048, USA TI - Large expansion of ATTCT pentanucleotide repeat in spinocerebellar ataxia type 10 (SCA10) MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400700234 SO - American Journal of Human Genetics 2000 ;67(4):55-55 1258 UI - 15108 AU - Matsuura T AU - Yamagata T AU - Burgess' DL AU - Rasmussen A AU - Grewal RP AU - Watase K AU - Khajavi M AU - Mccall AE AU - Davis CF AU - Zu L AU - Achari M AU - Pulst SM AU - Alonso E AU - Noebels JL AU - Nelson DL AU - Zoghbi HY AU - Ashizawa T AD - Baylor Coll Med, Dept Neurol, Houston, TX 77030, USABaylor Coll Med, Div Neurosci, Houston, TX 77030, USABaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USABaylor Coll Med, Dept Pediat, Houston, TX 77030, USABaylor Coll Med, Howard Hughes Med Inst, Houston, TX 77030, USAVet Affairs Med Ctr, Neurol Serv, Houston, TX 77030, USAInst Nacl Neurol & Neurocirugia, Mexico City, DF, MexicoNew Jersey Neurosci Inst, JKF Med Ctr, Edison, NJ, USAUniv Calif Los Angeles, Cedars Sinai Med Ctr, Rose Moss Lab Parkinson & Neurodgenerat Dis, Burns & Allen Res Inst,Div Neurol,Sch Med, Los Angeles, CA 90048, USAAshizawa, T, Baylor Coll Med, Dept Neurol, Houston, TX 77030, USA TI - Large expansion of the ATTCT pentanucleotide repeat in spinocerebellar ataxia type 10 AB - Spinocerebellar ataxia type 10 (SCA10; MIM 603516; refs 1.2) is an autosomal dominant disorder characterized by cerebellar ataxia and seizures. The gene SCA10 maps to a 3.8-cM interval on human chromosome 22q13-qter (refs 1.2). Because several other SCA subtypes show trinucleotide repeat expansions, we examined microsatellites in this region. We found an expansion of a pentanucleotide (ATTCT) repeat in intron 9 of SCA10 in all patients in five Mexican SCA10 families. There was an inverse correlation between the expansion size, up to 22.5 kb larger than the normal allele, and the age of onset (r(2)=0.34, P=0.018). Analysis of 562 chromosomes from unaffected individuals of various ethnic origins (including 242 chromosomes from Mexican persons) showed a range of 10 to 22 ATTCT repeats with no evidence of expansions. Our data indicate that the new SCA10 intronic ATTCT pentanucleotide repeat in SCA10 patients is unstable and represents the largest microsatellite expansion found so far in the human genome MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 161 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1061-4036 UR - ISI:000089638800016 L2 - TRINUCLEOTIDE REPEAT; POLYGLUTAMINE EXPANSION; CAG REPEAT; GENE; CLONING; DNA; REVEALS; DISEASE SO - Nature Genetics 2000 ;26(2):191-194 1259 UI - 14321 AU - Maturino-Lozoya H AU - Munoz-Rodriguez D AU - Jaimes-Romero F AU - Tawfik H AD - Nortel, Richardson, TX 75082, USANortel, Apodaca 66600, NL, MexicoCairo Univ, Fac Engn, Electron & Commun Dept, Giza, EgyptMaturino-Lozoya, H, Nortel, Richardson, TX 75082, USA TI - Handoff algorithms based on fuzzy classifiers AB - One method to increase capacity in mobile communications systems is to decrease the cell size or service area. However, due to this area reduction, a mobile will pass through more cells during a call. To maintain the reliability of the system, the success rate of call transfers must increase as the cell area diminishes, preventing a ping-pong effect. Hence new and better handoff algorithms must be developed. Fuzzy classifier schemes are proposed in this paper in order to select the base stations that will best serve mobiles in a typical cellular system, The performance of handoff algorithms based on different classification techniques is discussed and evaluated through digital simulation, Results show better cell definition than the conventional handoff approach. For large-variance propagation channels, a reduction in the handoff number can be achieved, The applicability of the proposed methodology is also discussed MH - Egypt MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Telecommunications;Transportation Science & Technology U5 - J;Article AV - English IS - 0018-9545 UR - ISI:000166943100025 L2 - fuzzy classifiers;handoff;pattern recognition SO - Ieee Transactions on Vehicular Technology 2000 ;49(6):2286-2294 1260 UI - 16463 AU - Maupome G AU - ez-de-Bonilla FJ AU - Sheiham A AD - Univ British Columbia, Fac Dent, Vancouver, BC V5Z 1M9, CanadaUniv Nacl Autonoma Mexico, Fac Odontol, Mexico City 04510, DF, MexicoUniv Coll London, Sch Med, London W1N 8AA, England TI - Perception of a stereotypical patient within a dental education setting MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal PB - ALEXANDRIA: AMER ASSOC DENTAL RESEARCH RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Meeting Abstract AV - English IS - 0022-0345 UR - ISI:000084937003285 SO - Journal of Dental Research 2000 ;79():555-555 1261 UI - 15673 AU - Maust BE AU - Williamson JG AU - Darnell RL AD - Univ Florida, Dept Hort Sci, Gainesville, FL 32611, USAMaust, BE, Ctr Invest Cient Yucatan, Merida, Yucatan, Mexico TI - Carbohydrate reserve concentrations and flower bud density effects on vegetative and reproductive development in southern highbush blueberry AB - Vegetative budbreak, leaf area development, and fruit size in southern highbush blueberry (Vaccinium corymbosum L, interspecific hybrids) decrease as flower bud density increases. The effect on fruit size has been attributed to both insufficient carbohydrate reserves and reductions in current photoassimilates caused by decreased vegetative growth. Experiments were conducted with two southern highbush blueberry cultivars, 'Misty' and 'Sharpblue',to test the hypothesis that increased carbohydrate reserve concentrations Can overcome the detrimental effects of high flower bud density by increasing vegetative budbreak, shoot development, and whole-canopy net CO2 exchange rate (NCER), which in turn will increase fruit size. Fully foliated plants were placed in greenhouses With either ambient (AMB) CO2 levels (approximate to 360 mu mol.mol(-1)) or enriched (ENR) CO2 levels (approximate to 700 mu mol.mol(-1)) for 38 d during fall. Plants Were then moved outdoors, hand defoliated, and flower bud density (flower buds/cm cane length) adjusted to range from 0.07 to 0.31, Root starch and whole plant carbohydrate concentrations increased in ENR compared with AMB plants of both cultivars, Vegetative budbreak (number per centimeter cane length), leaf area, and whole-canopy NCER decreased as flower bud density increased in AMB and ENR plants of both cultivars; however, ENR 'Sharpblue' plants had significantly greater vegetative growth and whole-canopy NCER at a given flower bud density compared with AMB 'Sharpblue', Concomitant with this was an increase in fruit fresh weight in ENR compared to AMB 'Sharpblue', This was not the case with 'Misty', where vegetative development and fruit size were similar in ENR and AMB plants. Thus, the hypothesis that increased carbohydrate reserves will increase vegetative development and subsequent fruit size may be true only in certain cultivars of southern highbush blueberry. Alternatively, the increased carbohydrate reserve concentrations in ENR compared with AMB 'Misty' plants may have been insufficient to affect subsequent vegetative or reproductive development MH - Mexico|Yucatan MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Horticulture U5 - J;Article AV - English IS - 0003-1062 UR - ISI:000088150100003 L2 - fruit;leaf area;photosynthesis;starch;sugar;Vaccinium corymbosum;APPLE-TREES; FRUIT SIZE; PISTACHIO TREES; CULTIVARS; LEAF; TRANSLOCATION; EXCHANGE; STORAGE; NUMBER; CARBON SO - Journal of the American Society for Horticultural Science 2000 ;125(4):413-419 1262 UI - 14412 AU - Maya-Nunez G AU - Janovick JA AU - Conn PM AD - Oregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Beaverton, OR, USAOregon Hlth Sci Univ, Dept Physiol & Pharmacol, Beaverton, OR, USAInst Mexicano Seguro Social, CMN SXXI, Hosp Pediat, Unidad Invest Med Biol Desarrollo, Mexico City 06725, DF, MexicoConn, PM, 505 NW 185th Ave, Beaverton, OR 97006, USA TI - Combined modification of intracellular and extracellular loci on human gonadotropin-releasing hormone receptor provides a mechanism for enhanced expression AB - The mammalian gonadotropin-releasing hormone (GnRH) receptor (GnRH-R) has been a therapeutic target for human and animal medicine. This receptor is a unique G-protein-coupled receptor that lacks the intracellular C-terminal domain commonly associated with this family. Development of highthrough put screens for agents active in humans has been hampered by low expression levels of the hGnRH-R in cellular models. Two sites have attracted the interest of laboratories studying regulation of expression, The chimeric addition of the C-terminal tail from catfish GnRH-R (cfGnRH-R) to the rat GnRH-R significantly augmented receptor expression in CH, cells. In addition, rodent GnRH-R contains 327 amino acids, but cow, sheep, and human GnRH-R (hGnRH-R) contain 328 residues, the "additional" residue being a Lys 191. Deletion of Lys 191 (del 191) from the hGnRH-R resulted in increased receptor expression levels and decreased internalization rates in both COS-7 and HEK 293 cells. In this study, the combined effect of the addition of the C-tail from cfGnRH-R and deletion of the Lys 191 from the hGnRH-R was compared to expression of the wild-type (WT) or either alteration alone in a transient expression system using primate cells. The altered receptor (hGnRH-R[del 191]-C-tail) showed significantly increased receptor expression at the cell surface compared with the WT or either modification alone. The inositol phosphate response to stimulation was also significantly elevated in response to GnRH agonist. After treatment with a GnRH agonist, the altered receptors showed a slower internalization rate. The homologous steady-state regulation of the WT and the altered receptors was similar, although the response of the altered receptors was significantly decreased. These results suggest that the conformational change in the receptor as a result of the deletion of Lys 191 and the addition of the C-terminus tail substantially increased the steady-state receptor expression and decreased internalization and homologous regulation. Because the effects on expression are greater than additive, it appears that these alterations exert their effects by differing means. These techniques for expression of the hGnRH-R in transfected mammalian cells provide the basis for a therapeutic screen for GnRH analogs, agonists, and antagonists of the hGnRH MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 14 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0969-711X UR - ISI:000166655500022 L2 - gonadotropin-releasing hormone receptor;chimeric receptor;enhanced receptor expression;C-TERMINAL TAIL; LUTROPIN/CHORIOGONADOTROPIN RECEPTOR; INTERNALIZATION KINETICS; CARBOXYL-TERMINUS; CYSTEINE RESIDUES; CYTOPLASMIC TAIL; AMINO-ACID; PHOSPHORYLATION; CELLS; DESENSITIZATION SO - Endocrine 2000 ;13(3):401-407 1263 UI - 14914 AU - maya-Tapia A AU - Martinez H AU - Hernandez-Lamoneda R AU - Lin CD AD - UNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoUAEM, Ctr Invest Quim, Cuernavaca, Morelos, MexicoKansas State Univ, Dept Phys, Manhattan, KS 66506, USAAmaya-Tapia, A, UNAM, Ctr Ciencias Fis, AP 48-3, Cuernavaca, Morelos, Mexico TI - Charge transfer in H++Ar collisions from 10 to 150 keV AB - Total as well as partial cross sections for single-electron capture of H+ on Ar are calculated by the semiclassical impact parameter method, using a two-center atomic basis expansion, in the impact energy range 10-150 keV. The resulting total cross sections are in good agreement with previous experimental data. Partial cross sections agree qualitatively with measurements at high energies, while at low energies the experimental data are found to be approximately six times smaller than the present results MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000165200800075 L2 - ION-ATOM COLLISIONS; RARE-GAS ATOMS; CROSS-SECTIONS; ELECTRON-CAPTURE; ENERGY H+; HYDROGEN; PROTONS; IMPACT; H(2P) SO - Physical Review A 2000 ;62(5): 1264 UI - 15785 AU - Mayorga M AU - Corona C AU - Sandoval C AU - Pizio O AD - UAEMex, Fac Ciencias, Toluca 50000, ThailandUniv Nacl Autonoma Mexico, Inst Quim, Circuito Exterior, Coyoacan 04510, DF, MexicoMayorga, M, UAEMex, Fac Ciencias, Av Inst Literario 100, Toluca 50000, Thailand TI - The effective interactions between colloidal hard spheres in microporous media: Hypernetted chain approximation for replica Ornstein-Zernike equations AB - In this work, the effective interaction between hard sphere colloidal particles in the. presence of a hard sphere solvent, both dispersed either in a disordered quenched matrix of hard spheres or in the random matrix of freely overlapping obstacles is analyzed, using the replica Ornstein-Zernike (ROZ) integral equations. The ROZ equations are supplemented by the hypernetted chain closure. The presence of either disordered or random matrix is manifested in the attractive minima of the colloid-colloid potential of mean force (PMF), in addition to a set of minima due to the presence of solvent species. The effects of matrix microporosity and solvent density on the PMF and the intercolloidal forces are investigated MH - Mexico|Distrito Federal MH - Thailand PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000087855800004 L2 - DISORDERED POROUS-MEDIA; ADSORBENT MICROSTRUCTURE; ADSORPTION EQUILIBRIA; FLUIDS; DEPLETION; MATRICES SO - Czechoslovak Journal of Physics 2000 ;50(6):727-736 1265 UI - 15728 AU - mbriz-Perez H AU - Acha E AU - Fuerte-Esquivel CR AD - Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8QQ, Lanark, ScotlandInst Tecnol Morelia, Dept Ingn Elect & Elect, Morelia, Michoacan, MexicoAmbriz-Perez, H, Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8QQ, Lanark, Scotland TI - Advanced SVC models for Newton-Raphson load flow and Newton optimal power flow studies AB - Advanced load flow models for the static VAR compensator (SVC) are presented in this paper. The models are incorporated into existing load flow (LF) and optimal power flow (OPF) Newton algorithms, Unlike SVC models available in open literature, the new models depart from the generator representation of the SVC and are based instead on the variable shunt susceptance concept. In particular, a SVC model which uses the firing angle as the state variable provides key information for cases when the load flow solution is used to initialize other power system applications, e.g., harmonic analysis, The SVC state variables are combined with the nodal voltage magnitudes and angles of the network in a single frame-of-reference for a unified, iterative solution through Newton methods. Both algorithms, the LF and the OFF exhibit very strong convergence characteristics, regardless of network size and the number of controllable devices. Results are presented which demonstrate the prowess of the new SVC models MH - Mexico|Michoacan MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000087916000019 L2 - FACTS;newton method;OFF;SVC;voltage control SO - Ieee Transactions on Power Systems 2000 ;15(1):129-136 1266 UI - 15124 AU - Mccaig AM AU - Tritlla J AU - Banks DA AD - Univ Leeds, Sch Earth Sci, Leeds LS2 9JT, W Yorkshire, EnglandNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoMcCaig, AM, Univ Leeds, Sch Earth Sci, Leeds LS2 9JT, W Yorkshire, England TI - Fluid mixing and recycling during Pyrenean thrusting: Evidence from fluid inclusion halogen ratios AB - Syntectonic fluids have been sampled through fluid inclusion microthermometry and crush-leach analyses (cations and halogens) from a 50 km N-S transect through the central-southern Pyrenees. The fluid inclusions are contained in syntectonic quartz veins in Triassic redbeds, Cretaceous carbonates and Hercynian basement rocks, with some calcite and dolomite data from limestones and evaporites in more external parts of the belt. The main datasets come from (1) Alpine shear zones cutting the Neouvielle granodiorite in the Hercynian Axial Zone at the north end of the transect; (2) An imbricate zone beneath the Alpine Gavarnie Thrust at the Pic de Port Vieux; (3) Several localities in the footwall and hangingwall of the Gavarnie Thrust on the southern margin of the Axial Zone. The inclusion fluids generally decrease in salinity from 27-35% at the northern end of the transect to 7-22% on the southern margin of the Axial Zone. The majority of the inclusions have Cl/Br ratios lower than seawater and are interpreted as relict fluids after seawater evaporation and halite precipitation in the upper Trias. This interpretation is supported by Cl-Br-Na systematics, which are consistent with a change from halite to halite + sylvite precipitation with progressive evaporation. Fluids in the basement shear zones are interpreted to have essentially the same evaporitic origin as those still contained in sedimentary formations, although it is possible that final concentration of brines in the Neouvielle Massif involved retrograde hydration reactions with removal of water by precipitation of hydrous minerals. The fluids are also very similar in salinity and halogen chemistry to those found in veins associated with Mesozoic Pb-Zn-F deposits which predate the thrusting. The lower salinities seen at the southern margin of the Axial Zone are interpreted to reflect mixing of the brines with a higher level fluid (connate or meteoric water) circulating within the Mesozoic carbonates of the higher thrust sheets. At one locality where Triassic evaporites are still present, high Cl/Br ratios at relatively low salinities are present in inclusions within the underlying Triassic redbeds, but low Cl/Br ratios at higher salinities are seen lower in the sequence. This is consistent with dissolution of halite by a dilute fluid, but with limited penetration downwards. We suggest that the fluid history of the Pyrenees evolved through a series of stages: (1) Upper Triassic evaporite formation with sinking of brines into underlying redbeds and fractured basement rocks; (2) Circulation of brines with formation of Pb-Zn deposits along faults at some time between the Triassic and the Upper Cretaceous; (3) Renewed extension with erosion of Triassic rocks in many areas and further drawing down of Triassic brines into the basement; (4) Deposition of U. Cretaceous and Palaeocene carbonates containing connate waters of marine origin: (5) Formation of the Pyrenean thrust belt with overpressuring and expulsion of the brines along shear zones and faults; (6) Creation of topography with a high-level circulation system in the Mesozoic thrust sheets driven largely by topography. At the southern margin of the Axial Zone there was limited mixing of the deeper, overpressured brines with these more dilute, hydrostatically pressured fluids. An important point is that because of their density, hypersaline brines are difficult to expel from the upper crust, and may be involved in a succession of alteration and mineralisation events in the same general area over hundreds of millions of years. Copyright (C) 2000 Elsevier Science Ltd MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-7037 UR - ISI:000089664100012 L2 - GOLD-QUARTZ VEINS; OIL-FIELD BRINES; SALINITY VARIATIONS; SWISS-ALPS; SHEAR ZONE; FRANCE; FLOW; CIRCULATION; EVOLUTION; DEPOSITS SO - Geochimica et Cosmochimica Acta 2000 ;64(19):3395-3412 1267 UI - 15683 AU - Mccaig AM AU - Tritlla J AU - Banks DA AD - Univ Leeds, Sch Earth Sci, Leeds LS2 9JT, W Yorkshire, EnglandUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 14510, DF, MexicoMcCaig, AM, Univ Leeds, Sch Earth Sci, Leeds LS2 9JT, W Yorkshire, England TI - Fluid flow patterns during Pyrenean thrusting AB - Geochemical data for fluid circulation patterns during thrusting in the Pyrenees are reviewed. New halogen data from fluid inclusions suggests that brines responsible for metasomatic alteration in shear zones, and expelled along the Gavarnie Thrust, were of evaporitic origin. These brines mixed with more dilute formation waters in a topographically driven flow system at higher levels. The brines probably formed in the Triassic and were also involved in che formation of Mesozoic Pb-Zn deposits. Dense fluids are hard to completely expel from upper crustal rocks, and recycling of such fluids through several metasomatic events is probably a common process. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000088104900099 L2 - halogens;fluid inclusions;thrust;shear zones;brine;Pyrenees;INCLUSION; FRANCE; BRINES SO - Journal of Geochemical Exploration 2000 ;69():539-543 1268 UI - 16253 AU - Mccoll KA AU - Tordo N AU - Setien AA AD - CSIRO, Australian Anim Hlth Lab, Geelong, Vic 3220, AustraliaInst Pasteur, Lab Lyssavirus, F-75724 Paris, FranceInst Mexicano Seguro Social, Unidad Invest Med & Immunol, Mexico City 03020, DF, MexicoMcColl, KA, CSIRO, Australian Anim Hlth Lab, POB 24, Geelong, Vic 3220, Australia TI - Bat lyssavirus infections AB - Bats, which represent approximately 24% of all known mammalian species, frequently act as vectors of lyssaviruses. In particular, insectivorous bats play an important role in the epidemiology of rabies and some rabies-like viruses, while the haematophagous vampire bats are the major wildlife vector for rabies in Latin America. in contrast, the role of fruit bats (flying foxes) in the epidemiology of the recently discovered Australian bat lyssavirus is only just emerging. Information on the pathogenesis of lyssaviruses in bats is scarce. However, in general, mortality in bats infected via a natural route appears to be low, and seroconversion occurs in many of those that survive. While transmission of rabies from an infected bat may be via a bite, other routes are apparently also possible. Methods for the diagnosis of bat lyssavirus infections in bats and terrestrial mammals (including humans) are similar to the classical procedures for rabies. Measures for the prevention and control of these diseases are also similar to those for rabies, although additional innovative methods have been tested, specifically to control vampire bat rabies MH - Australia MH - France MH - Mexico|Distrito Federal PB - PARIS: OFFICE INT EPIZOOTIES RP - NOT IN FILE U3 - TC 32 U4 - Veterinary Sciences U5 - J;Review AV - English IS - 0253-1933 UR - ISI:000086242500017 L2 - Australian bat lyssavirus;bats;flying foxes;fruit bats;insectivorous bats;lyssavirus;rabies;vampire bats;zoonoses;CENTRAL NERVOUS-SYSTEM; RABIES-LIKE VIRUSES; MOLECULAR EPIDEMIOLOGY; COMPARATIVE PATHOGENESIS; ORAL VACCINATION; UNITED-STATES; VAMPIRE BATS; AUSTRALIA; DIAGNOSIS; CELL SO - Revue Scientifique et Technique de l Office International des Epizooties 2000 ;19(1):177-196 1269 UI - 15772 AU - McKenney CD AU - Winterton LC AU - Morgan CF AU - Long B AU - Milla A AD - Ciba Vis Corp, Duluth, GA, USAIPN, Coll Optometry, Mexico City 07738, DF, Mexico TI - Dk performance of lotrafilcon A (Focus (R) Night & Day (TM)) Following thirty night extended wear MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246705005 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S928-S928 1270 UI - 14610 AU - Mcleod JG AU - Pfeiffer WH AU - Depauw RM AU - Clarke JM AD - Agr & Agri Food Canada, Res Branch, Semiarid Prairie Agr Res Ctr, Swift Current, SK S9H 3X2, CanadaInt Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoMcLeod, JG, Agr & Agri Food Canada, Res Branch, Semiarid Prairie Agr Res Ctr, POB 1030, Swift Current, SK S9H 3X2, Canada TI - AC Ultima spring triticale AB - AC Ultima, a spring triticale cultivar (X Triticosecale Wittmack), is widely adapted to the Canadian Prairies. AC Ultima represents an improvement in Hagberg Falling Number, which is usually associated with improved harvest-time sprouting resistance. AC Ultima expressed high grain yield, early maturity, heavy kernels and excellent lodging resistance compared to the check cultivars. AC Ultima is very resistant to the prevalent races of leaf rust, stem rust, and common bunt and resistant to common root rot. AC Ultima is eligible for the grades of Canada Triticale MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: AGR INST CANADA RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0008-4220 UR - ISI:000166123000026 L2 - cultivar description;triticale (spring, X Triticosecale Wittmack);Hagberg Falling Number;yield;maturity;disease resistance;seed size SO - Canadian Journal of Plant Science 2000 ;80(4):831-833 1271 UI - 14875 AU - Meaburn J AU - O'Connor JA AU - Lopez JA AU - Bryce M AU - Redman MP AU - Noriega-Crespo A AD - Univ Manchester, Jodrell Bank Observ, Dept Phys & Astron, Macclesfield SK11 9DL, Cheshire, EnglandUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoCALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125, USAMeaburn, J, Univ Manchester, Jodrell Bank Observ, Dept Phys & Astron, Macclesfield SK11 9DL, Cheshire, England TI - The ejecta from the luminous blue variable star P Cygni AB - Further optical observations have been made with the Manchester Occulting Mask Imager and Manchester Echelle Spectrometer of the inner and outer shells of P Cygni, and of the 7-arcmin long giant lobe projecting from this luminous blue variable star. An image in the light of the fluorescently excited [Ni II] 7378-Angstrom line has revealed the knottiness of the inner shell. Well defined 'velocity ellipses' for the position/velocity arrays across the outer shell indicate that its expansion velocity is 160 km s(-1) which is somewhat lower than the previously reported value. The kinematical behaviour of the giant lobe, both in the vicinity of P Cygni, and further away, emphasizes its strange nature, although close association with P Cygni is again suggested by these new observations. One possibility is that this lobe is a 'trail' of collimated ejected material. The observations are compared with a 60-mum IRAS high-resolution map of the region. A variety of possible explanations of the observed phenomena are explored, e.g. radio knots in the outer stellar wind either coalesce or expand to become the [Ni II]7378-Angstrom emitting knots in the inner shell; that a mass-loaded wind overunning slower moving clumps explains the kinematics of the inner shell; that the one-sided giant lobe could be a 'trail' of ejected material from P Cygni funnelled through the outer shell MH - United Kingdom MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000165325100027 L2 - circumstellar matter;stars : individual : P Cygni;stars : variables : other;RADIO NEBULA; SHOCK SO - Monthly Notices of the Royal Astronomical Society 2000 ;318(2):561-572 1272 UI - 15320 AU - Meaburn J AU - Redman MP AU - Bryce M AU - Lopez JA AU - Al-Mostafa ZA AU - Dyson JE AD - Univ Manchester, Jodrell Bank Observ, Dept Phys & Astron, Macclesfield, Cheshire, EnglandUNAM, Inst Astron, Ensenada, MexicoKing Abdulaziz City Sci & Technol, Inst Astron & Geophys Res, Riyadh, Saudi ArabiaUniv Leeds, Dept Phys & Astron, Leeds, W Yorkshire, EnglandMeaburn, J, Univ Manchester, Jodrell Bank Observ, Dept Phys & Astron, Macclesfield, Cheshire, England TI - Truncated collimated flows in Abell 30, Abell 78 and the Honeycomb nebula AB - Localised collimated flows of ionized gas are found in two hydrogen deficient planetary nebulae, Abell 30 and Abell 78 as well as in the Honeycomb complex of interlocking shells in halo of 30 Dor in the Large Magellanic Cloud. One common feature of these flows, in seemingly disparate objects, is that they all terminate at around the same difference in radial velocity (with respect to that of the systemic radial velocity). A possible explanation involves high speed flows being decelerated by mass-loading. In Abell 30 and 78, mass is injected by clumps embedded in the fast wind. In the Honeycomb nebula, a supernova blast wave has pierced an old dense shell wall which adds mass to the post-shock flow via a boundary layer MH - United Kingdom MH - Mexico|Baja California MH - Saudi Arabia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000089142200029 L2 - KINEMATICS SO - Astrophysics and Space Science 2000 ;272(1-3):217-220 1273 UI - 15478 AU - Meaburn J AU - Lopez JA AU - Noriega-Crespo A AD - Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoCALTECH, Ctr Infrared Proc & Anal, SIRTF Sci Ctr, Pasadena, CA 91125, USAMeaburn, J, Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England TI - The complex environment of the high-excitation planetary nebula NGC 3242 AB - Spatially resolved profiles of the H alpha, [N II] lambda 6584, and [O III] lambda 5007 nebular emission lines, obtained with the Manchester echelle spectrometer combined with the 2.1 m San Pedro Martir telescope, have revealed the velocity structure of the nebular core and of one of the three (A, B, and C) inner "halos" of the high-excitation planetary nebula NGC 3242. The core is shown to have a cylindrical structure expanding at 25 km s(-1). The bright, diffuse, line-emitting, inner spherical halo A surrounding the intensely bright elliptical core is shown to be limb brightened, but its expansion velocity is unclear. The surrounding diffuse, 2.5 pc diameter halo B is modeled by a thick shell expanding at 20 km s(-1) although the contribution of scattered [O III] lambda 5007 emission is unknown at present. The origin of the broad profiles from the fainter, patchy, 0.44 pc diameter halo C is again somewhat uncertain and may originate in scattered core light. Far-infrared (FIR) observations with IRAS and the Infrared Space Observatory (ISO) reveal the presence of warm dust throughout the core and inner halos on NGC 3242. Alternatively, the split profiles could imply an expansion velocity of around 20 km s(-1) for halo C if scattering is discounted. There is a large filamentary structure of line-emitting gas 1.7 pc to the west of the nebular core. This is shown to be the western boundary of extended FIR emission from warm dust. A patchy component associated with this filamentary nebulosity emits the [O III] lambda 5007 line with anomalously high intensity yet is shown here to be kinematically relatively inert. Likewise, [N II] lambda 6584 profiles from the filamentary edge are very narrow with turbulent motions of 8 km s(-1). Certainly, the are is being photoionized by leakage radiation from NGC 3242, but the radial velocities of the line profiles are inconsistent with its origin as a simple shell expanding radially from this planetary nebula. An asymmetric lobe remains a possibility, in which case the are could be an ancient halo of NGC 3242. The more mundane possibility that the are is simply photoionized ambient gas is not completely ruled out by the present observations. Strange, faint, broad [O III] lambda 5007 line profiles are found over the whole 15' diameter area being considered here. The extended FIR emission region implies the presence of hot dust and suggests therefore that these [O III] lambda 5007 line profiles could have a scattered origin MH - United Kingdom MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000088749300012 L2 - ISM : kinematics and dynamics;planetary nebulae : individual (NGC 3242);stars : mass loss;IRAS SURVEY DATA; GIANT HALO; IMAGE CONSTRUCTION; BOW SHOCK; MICROSTRUCTURES; KINEMATICS; NGC-6543; EVOLUTION; TELESCOPE; EXPANSION SO - Astrophysical Journal Supplement Series 2000 ;128(1):321-334 1274 UI - 15777 AU - Meaney E AU - Alva F AU - Moguel R AU - Meaney A AU - Alva J AU - Webel R AD - Reg Hosp 10 Octubre, Cardiovasc Unit, ISSSTE, Mexico City, DF, MexicoUniv Hosp & Clin, Dept Internal Med, Div Cardiol, Columbia, MO, USAMeaney, E, Reg Hosp 10 Octubre, Cardiovasc Unit, ISSSTE, Mexico City, DF, Mexico TI - Formula and nomogram for the sphygmomanometric calculation of the mean arterial pressure MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 17 U4 - Cardiac & Cardiovascular Systems U5 - J;Letter AV - English IS - 1355-6037 UR - ISI:000087835700023 L2 - HYPERTENSION SO - Heart 2000 ;84(1):64-64 1275 UI - 16086 AU - Medina-Boudri A AU - Bueno-Baques D AU - Fuentes-Cobas L AU - Miki-Yoshida M AU - Matutes-Aquino J AD - Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv La Habana, Fac Fis, IMRE, Lab Magnetismo, Ciudad De La Habana 10400, CubaMedina-Boudri, A, Ctr Invest Mat Avanzados, Complejo Ind Chihuahua Miguel de Cervantes 120, Chihuahua 31109, Mexico TI - Study of reversible and irreversible magnetization processes of coprecipitated cobalt ferrite AB - Cobalt ferrite was obtained by coprecipitation of iron and cobalt sulphates into acetone medium. The Co0.62+Fe0.43+[Co0.42+Fe1.63+]O-4 cation distribution was obtained from Mossbauer spectroscopy at room temperature. Saturation magnetization of 74.1 emu/g and an intrinsic coercive field of 528 Oe were measured using a vibrating sample magnetometer. Using the moving Preisach model, separation of reversible (M-rev) and irreversible (M-irr) magnetization components was performed. The parameters eta defined as eta=(dM(rev)/dM(irr))(Hi) and k(m) the moving Preisach parameter expressed through the relation eta=k(m)chi(rev), were evaluated in order to investigate the hysteretic behavior of M-rev. Additional characterization was done in order to investigate the elemental composition, structure, and morphology of the samples. (C) 2000 American Institute of Physics. [S0021-8979(00)23408-7] MH - Cuba MH - Mexico|Chihuahua PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 12 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000086728800111 SO - Journal of Applied Physics 2000 ;87(9):6235-6237 1276 UI - 15781 AU - Medina-De la Garza C AU - Brattig NW AU - Salinas-Carmona MC AD - Bernhard Nocht Inst Trop Med, Hamburg, GermanyUANL, Fac Med, Monterrey 64460, Mexico TI - In vitro RANTES production stimulated by Diethylcarbamazine and Ivermectin MH - Germany MH - Mexico|Nuevo Leon PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000086643101054 SO - Faseb Journal 2000 ;14(6):A1091-A1091 1277 UI - 15534 AU - Medina-Franco H AU - Heslin MJ AU - Cortes-Gonzalez R AD - Univ Alabama, Dept Surg, Sect Surg Oncol, Birmingham, AL 35233, USANatl Inst Nutr, Dept Surg, Mexico City, DF, MexicoMedina-Franco, H, Univ Alabama, Dept Surg, Sect Surg Oncol, 321 Kracke Bldg,1922 7th Ave S, Birmingham, AL 35233 USA TI - Clinicopathological characteristics of gastric carcinoma in young and elderly patients: A comparative study AB - Background: Gastric cancer is one of the most common gastrointestinal malignancies worldwide, Some studies have suggested that it has a worse prognosis in young than in elderly patients. Methods: All young and elderly patients treated for gastric adenocarcinoma during the period 1988 to 1994 in a ternary referral center in Mexico City were included. Demographic, clinical, and pathologic features of young patients (less than 40 years of age) with gastric cancer were compared with those of elderly patients (70 years of age or older) with the same diagnosis. Overall survival was the main outcome measure. Results: There were 38 patients in each group. The mean age of the young and elderly groups was 33 and 77 years, respectively. Family history of gastric cancer was reported by 6 patients of the younger group and by 1 patient in the older group (P < .05). Most patients in both groups were symptomatic and had an advanced stage of the disease. With a mean follow-up of 17 months, the overall median survival for all patients was 12 months. By group, the median survival was 13 and 12 months for the young and elderly patients, respectively (P = .38). Variables with significant impact on survival were the stage of the disease, possibility of surgical resection, location of the tumor, and a family history of gastric cancer. Conclusions: Young patients represent a significant proportion of patients with gastric cancer in Hispanic populations. There were no significant differences in clinicopathological characteristics and outcome of gastric adenocarcinoma between young and elderly patients. Survival was determined by the stage of the tumor and the possibility of complete surgical resection MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 26 U4 - Oncology;Surgery U5 - J;Article AV - English IS - 1068-9265 UR - ISI:000088583800008 L2 - gastric cancer;younger patients;elderly patients;comparative study;prognosis;CANCER; AGE; ADENOCARCINOMA; PREGNANCY; STOMACH; ADULTS SO - Annals of Surgical Oncology 2000 ;7(7):515-519 1278 UI - 16655 AU - Meierkord H AU - Grunig F AU - Gutschmidt U AU - Gutierrez R AU - Pfeiffer M AU - Draguhn A AU - Bruckner C AU - Heinemann U AD - Humboldt Univ, Neurol Klin & Poliklin, Klinikum Charite, D-10117 Berlin, GermanyHumboldt Univ, Inst Physiol, Klinikum Charite, D-10117 Berlin, GermanyInst Mexicano Psiquiat, Mexico City, DF, MexicoMeierkord, H, Humboldt Univ, Neurol Klin & Poliklin, Klinikum Charite, Schumannstr 20-21, D-10117 Berlin, Germany TI - Sodium bromide: effects on different patterns of epileptiform activity, extracellular pH changes and GABAergic inhibition AB - Results regarding the anticonvulsant potency of bromide have been questioned, and the mechanisms of its action are unclear. Using combined rat hippocampus entorhinal cortex slices we analyzed the effects of NaBr on four types of epileptiform discharges in two different models of epilepsy, the low-Ca2+ and the low-Mg2+ model. NaBr concentration-dependently reduced the frequency and finally blocked the low Ca2+-induced discharges. Low Mg2+-induced short recurrent discharges were also reduced in a concentration-dependent manner. In the entorhinal cortex the frequency of seizure-like events was reduced by 3 and 5 mM and the discharges were blocked by 7 mM NaBr. Also, the late recurrent discharges in the entorhinal cortex which do not respond to most clinically employed anticonvulsants were reduced by concentrations of 10 and 15 mM and completely blocked by 30 mM NaBr. Using pH-sensitive microelectrodes different effects of NaBr were seen than those of acetazolamide on extracellular pH under control conditions and after stimulation. Acetazolamide at 1 mM caused a reversible acidification of Delta pH: 0.2+/-0.14 at rest whereas no change on extracellular pH was seen with 5 mM NaBr. Acetazolamide increased the transient alkalosis induced by repetitive stimulation of the stratum radiatum in area CAI and reduced the subsequent acidosis. NaBr also increased the alkalosis but had no effect on the subsequent acidosis. A significant increase in paired-pulse inhibition was seen in a paired-pulse stimulation protocol used to monitor the efficacy of GABAergic inhibition at concentrations of 5 mM NaBr. This finding was confirmed in whole-cell patch clamp recordings from cultured hippocampal neurons showing an increase in inhibitory postsynaptic current amplitude. In summary, our results suggest a broad-spectrum anticonvulsant activity which is likely to be caused by its effects on membrane excitability, by an increase in GABAergic inhibition and is less likely caused by its effects on extracellular pH MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000084701100004 L2 - bromide;epileptiform discharges;carboanhydrase;pH;membrane excitability;GABAergic inhibition;ENTORHINAL CORTEX SLICES; GAMMA-AMINOBUTYRIC-ACID; TONIC-CLONIC SEIZURES; METHYL-D-ASPARTATE; HIPPOCAMPAL-NEURONS; SYNAPTIC TRANSMISSION; CEREBRAL-CORTEX; LOW MAGNESIUM; ANTICONVULSANTS; RESISTANT SO - Naunyn-Schmiedebergs Archives of Pharmacology 2000 ;361(1):25-32 1279 UI - 15352 AU - Mejia-Radillo Y AU - Yatsimirsky AK AU - Foroudian HJ AU - Gillitt ND AU - Bunton CA AD - Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106, USANatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoBunton, CA, Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA TI - Unexpected stoichiometry in the cleavage of bis(4-nitrophenyl) phosphate and 4-nitrophenyl phosphorochloridate by alkaline hydrogen peroxide AB - Reaction of alkaline hydrogen peroxide with bis(4-nitrophenyl) phosphate ion proceeds with simultaneous liberation of ca 2 equiv. of 4-nitrophenol per mole of substrate, and no evidence for build-up of an intermediate. Reaction of HO2- with the more activated 4-nitrophenyl phosphorochloridate gives 4-nitrophenol in up to 40% yield with simple first-order kinetics and no indication of a long-lived intermediate. A fast intramolecular nucleophilic displacement of 4-nitrophenolate ion by peroxide in the initially formed I-nitrophenyl peroxophosphate is proposed to explain this behavior. Copyright (C) 2000 John Wiley & Sons, Ltd MH - USA MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0894-3230 UR - ISI:000089037500003 L2 - hydrogen peroxide;bis(4-nitrophenyl) phosphate;4-nitrophenyl phosphorochloridate;cleavage;kinetics;NUCLEOPHILIC-SUBSTITUTION; DIESTER CLEAVAGE; DEPHOSPHORYLATION; MICELLES; ESTERS; MODEL SO - Journal of Physical Organic Chemistry 2000 ;13(9):505-510 1280 UI - 15623 AU - Mel'nikov IV AU - Mihalache D AU - Panoiu NC AD - Russian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaInst Atom Phys, Dept Theoret, R-76900 Bucharest, RomaniaNYU, Dept Phys, New York, NY 10003, USAMel'nikov, IV, Morelos State Autonomous Univ, Ctr Res Engn & Appl Sci, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Localized multidimensional femtosecond optical pulses in an off-resonance two-level medium AB - The propagation of a femtosecond optical pulse in a multidimensional off-resonance two-level medium is studied. Within the quasiadiabatic following approach, the evolution of the pulse is governed by a generalized Kadomtsev-Petviashvili equation with coupling between the spatial and temporal profile. The presence of this coupling can have a dramatic influence on the dynamics of the optical pulse. Thus, one can observe effects which cannot be described within the framework of the slowly-varying envelope approximation. In particular, we show that due to the interaction between the transient diffraction and the electrodynamic absorption, stable, localized multidimensional pulses can be formed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Romania MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000088284200016 L2 - VARYING ENVELOPE APPROXIMATION; CYCLE ELECTROMAGNETIC PULSES; QUADRATIC NONLINEARITY; DISPERSIVE MEDIA; REPETITION-RATE; RYDBERG ATOMS; LIGHT-PULSES; BULK MEDIA; PROPAGATION; GENERATION SO - Optics Communications 2000 ;181(4-6):345-351 1281 UI - 14208 AU - Melendez-Rodriguez M AU - Rendon W AU - Chavez G AU - Martinez-Guajardo G AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Mayor San Andres, Inst Invest Quim, La Paz, BoliviaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, Mexico TI - H-1 and C-13 NMR assignments of dihydropipataline, the main of four long-chain 1-(3,4-methylenedioxyphenyl)-alkanes from Piper darienence DC AB - Four 1-(3,4-methylenedioxyphenyl)-alkanes having linear ten, eleven. twelve and fourteen carbon atom chains, found in the roots of Piper darienence D.C., were separated by HPLC and their structures determined by mass spectrometry and NMR spectroscopy. Conventional 1D NMR methods were used for H-1 chemical shifts assignment of the main compound dihydropipataline (3) [1-(3,4-methylenedioxyphenyl)-dodecane]. The C-13 NMR assignment was carried out using conventional considerations and 2D NMR techniques (HETCOR and FLOCK) in combination with spectral C-13 NMR simulation and ab initio DFT-GIAO NMR calculations MH - Bolivia MH - Mexico|Distrito Federal PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 0712-4813 UR - ISI:000167168600004 L2 - CHEMICAL-SHIFTS; GIAO; SPECTRA; SPECTROSCOPY SO - Spectroscopy-An International Journal 2000 ;14(4):195-201 1282 UI - 15115 AU - Melendez FJ AU - Gallego-Luxan B AU - Demaison J AU - Smeyers YG AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainB Univ Autonoma Puebla, Fac Ciencias Quim, C Invest, Lab Quim Teor, Puebla 72570, MexicoUniv Lille 1, CNRS, URA 249, Spect Hertzienne Lab, F-59655 Villeneuve Dascq, FranceSmeyers, YG, CSIC, Inst Estructura Mat, 113-Bis, E-28006 Madrid, Spain TI - Ab initio determination of the infrared phosphine torsion spectrum in vinylphosphine with ZPE correction AB - The potential energy curve for the hindered internal rotation of the phosphine group in vinylphosphine is determined at MP2 and MP4 levels with a 6-311G(3df,p) basis set, and the vibrational zero point energy correction. From the optimal geometries of each conformation the kinetic parameter is calculated as a function of the rotation angle. By solving the Schrodinger equation for the internal rotation, the torsional levels and torsional wave functions are obtained. From these results and the electric dipole moment variations, Be torsional spectrum in the far infrared is synthesized. A c-type band progression for the syn-syn transitions is encountered. This result agrees fairly well with those obtained for ethylphosphine, the spectrum of which is well known. (C) 2000 John Wiley & Sons, Inc MH - France MH - Mexico|Puebla MH - Spain PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000089685900005 L2 - vinylphosphine;ab initio conformational calculations;torsional far infrared spectrum;ZPE correction;nonrigid molecules;ROTATIONAL SPECTRUM; MOLECULAR-CONSTANTS; DIPOLE-MOMENT; ETHYLPHOSPHINE SO - Journal of Computational Chemistry 2000 ;21(13):1167-1175 1283 UI - 16178 AU - Melendez J AU - Maldonado V AU - Bingle CD AU - Selman M AU - Pardo A AD - UNAM, Fac Ciencias, Mexico City 04000, DF, MexicoInst Nacl Cancerol, Mexico City 14000, DF, MexicoInst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Sheffield, Sheffield S10 2RX, S Yorkshire, EnglandPardo, A, UNAM, Fac Ciencias, Apartado Postal 21-630, Mexico City 04000, DF, Mexico TI - Cloning and expression of guinea pig TIMP-2. Expression in normal and hyperoxic lung injury AB - Tissue inhibitors of metalloproteinases (TIMPs) play a key regulatory role in extracellular matrix remodeling. By screening a lung library with a human TIMP-2 cDNA probe, we have isolated the cDNA corresponding to guinea pig TIMP-2. The 3.5-kb cDNA presents an open reading frame that predicts a protein of 220 amino acids showing 97.2, 96.8, 97.2, and 77.3% overall identity with human, mouse, rat, and chicken TIMP-2, respectively. Guinea pig TIMP-2 cDNA was expressed in CHO-K1 cells, showing a protein with the expected molecular weight and activity. Northern blot analysis revealed TIMP-2 expression in brain, kidney, intestine, spleen, heart, and lung. Transforming growth factor-beta down-regulated TIMP-2 mRNA in guinea pig lung fibroblasts, whereas a variety of other stimuli showed no effect. In normal and hyperoxia-exposed lungs, TIMP-2 mRNA was mainly localized in alveolar macrophages and epithelial cells. No quantitative differences were found by Northern blot. These results confirm that TIMP-2 is highly conserved in mammals and largely expressed in lungs MH - United Kingdom MH - Mexico|Distrito Federal PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physiology;Respiratory System U5 - J;Article AV - English IS - 1040-0605 UR - ISI:000086487300013 L2 - tissue inhibitor of metalloproteinase-2;matrix metalloproteinase;hyperoxia;TISSUE INHIBITOR; MESSENGER-RNA; CDNA CLONING; RAT LUNGS; METALLOPROTEINASES; FIBROBLASTS; COLLAGENASE; EXPOSURE; GROWTH; OXYGEN SO - American Journal of Physiology-Lung Cellular and Molecular Physiology 2000 ;278(4):L737-L743 1284 UI - 15720 AU - Melendrez R AU - Del Angel G AU - Bertin V AU - Valenzuela MA AU - Barbier J AD - Univ Autonoma Metropolitana, Dept Quim, Mexico City 09340, DF, MexicoInst Politecn Nacl, ESIQUIE, UPALM Zacatenco, Lab Catalisis & Mat, Mexico City 07738, DF, MexicoUniv Poitiers, CNRS, URA 350, Catalyse Chim Organ Lab, F-86022 Poitiers, FranceMelendrez, R, Univ Autonoma Metropolitana, Dept Quim, AP 55-534, Mexico City 09340, DF, Mexico TI - Selective hydrogenation of carvone and o-xylene on Pd-Cu catalysts prepared by surface redox reaction AB - A series of Pd and Pd-Cu bimetallic catalysts were prepared by surface redox reaction and coimpregnation methods. A comparison between the preparation methods in the activity and selectivity for o-xylene and carvone hydrogenation was done. FTIR studies showed that the Cu is deposited mainly in the low coordination Pd sites when the catalyst was prepared by redox, whereas a random distribution of Cu on the Pd surface was obtained for the catalyst prepared by coimpregnation. The activity and selectivity of bimetallic catalysts, were found to depending on the method of preparation used. For o-xylene hydrogenation in redox catalyst, the selectivity to trans-1,2-dimethylcyclohexane was lower than that obtained in the Pd/SiO2 reference catalyst, whereas in the coimpregnated catalyst, the trans isomer selectivity was higher. In the redox preparation, the selective hydrogenation of carvone favors the formation of carvotanacetone, whereas the coimpregnated catalyst favors the selectivity to carvomenthone. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000087952600018 L2 - selective hydrogenation;palladium;copper;catalysts;surface redox reaction;BIMETALLIC CATALYSTS; RU SO - Journal of Molecular Catalysis A-Chemical 2000 ;157(1-2):143-149 1285 UI - 16184 AU - Mellah R AU - Auvinet G AU - Masrouri F AD - Inst Natl Polytech Lorraine, Lab Environm Geomecan & Ouvrages, F-54501 Vandoeuvre Nancy, FranceUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoMasrouri, F, Inst Natl Polytech Lorraine, Lab Environm Geomecan & Ouvrages, BP 40, F-54501 Vandoeuvre Nancy, France TI - Stochastic finite element method applied to non-linear analysis of embankments AB - The deterministic Finite Element Method (FEM) is a valuable tool for understanding and predicting the mechanical behaviour of earth structures. The main difficulty in the application of this technique generally arises from the large uncertainties affecting the mechanical properties of materials to be introduced in the analysis. In many instances, these parameters should actually be considered as random variables or random fields. The Stochastic Finite Element Method (SFEM) should then be used to assess the results of the analyses in probabilistic terms. In this paper, the usefulness of the SFEM approach for engineering purposes is discussed and illustrated by analyses of embankments constructed by placing successive lifts of compacted soil. Construction materials are assumed to follow a simple non-linear constitutive law (Duncan JM, Chang CY, Non-linear analysis of stress and strain in soils, Journal of the Soils Mechanics and Foundation Division, ASCE 1970;96(5):1629-1653), Stochastic finite element analyses are performed using both the First Order-Second Moment method (FOSM) and Monte Carlo simulations (MC). A simple example shows that SFEM analyses can be useful to evaluate the relative influence of each of the parameters of the constitutive model on the results. Uncertainties affecting displacements, strains and stresses predictions for a large earth dam are also presented. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Mechanical;Mechanics;Statistics & Probability U5 - J;Article AV - English IS - 0266-8920 UR - ISI:000086459200003 L2 - uncertainty;geomechanics;stochastic finite element method;Monte Carlo method;embankments;earth dams;non-linear analysis SO - Probabilistic Engineering Mechanics 2000 ;15(3):251-259 1286 UI - 15178 AU - Melliti K AU - Meza U AU - Adams B AD - Utah State Univ, Dept Biol, Logan, UT 84322, USAAutonomous Univ San Luis Potosi, Coll Med, Dept Physiol & Pharmacol, SLP-78210 San Luis Potosi, MexicoAdams, B, Utah State Univ, Dept Biol, 5305 Old Main Hill, Logan, UT 84322 USA TI - Muscarinic stimulation of alpha 1E Ca channels is selectively blocked by the effector antagonist function of RGS2 and phospholipase C-beta 1 AB - Neuronal alpha 1E Ca channel subunits are widely expressed in mammalian brain, where they are thought to form R-type Ca channels. Recent studies have demonstrated that R-type channels contribute to neurosecretion and dendritic Ca influx, but little is known concerning their modulation. Here we show that alpha 1E channels are strongly stimulated, and only weakly inhibited, through M1 muscarinic acetylcholine receptors. Both forms of channel modulation are mediated by pertussis toxin- insensitive G-proteins. Channel stimulation is blocked by regulator of G-protein signaling 2 (RGS2) or the C-terminal region of phospholipase C-beta 1 (PLC beta 1ct), which have been previously shown to function as GTPase- activating proteins for G alpha q. In contrast, RGS2 and PLC beta 1ct do not block inhibition of alpha 1E through M1 receptors. Inhibition is prevented, however, by the C-terminal region of beta-adrenergic receptor kinase 1, which sequesters G beta gamma dimers. Thus, stimulation of alpha 1E is mediated by a pertussis toxin-insensitive G alpha subunit (e.g., G alpha q), whereas inhibition is mediated by G beta gamma. The ability of RGS2 and PLC beta 1ct to selectively block stimulation indicates these proteins functioned primarily as effector antagonists. In support of this interpretation, RGS2 prevented stimulation of alpha 1E with non-hydrolyzable guanosine 5'-0-( 3-thiotriphosphate). We also report strong muscarinic stimulation of rbE-II, a variant alpha 1E Ca channel that is insensitive to voltage-dependent inhibition. Our results predict that G alpha q-coupled receptors predominantly stimulate native R-type Ca channels. Receptor-mediated enhancement of R-type Ca currents may have important consequences for neurosecretion, dendritic excitability, gene expression, or other neuronal functions MH - USA MH - Mexico|San Luis Potosi PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 28 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000089538400009 L2 - Ca(v)2.3;R-type calcium channel;alpha 1E;RGS protein;phospholipase C-beta 1;GAP;effector antagonist;GTPASE-ACTIVATING PROTEIN; NEURONAL CALCIUM CHANNELS; CATALYZED ADP-RIBOSYLATION; N-TYPE; ACETYLCHOLINE-RECEPTORS; DEPENDENT MODULATION; TRANSMITTER RELEASE; CARBOXYL-TERMINUS; XENOPUS OOCYTES; BETA SO - Journal of Neuroscience 2000 ;20(19):7167-7173 1287 UI - 15708 AU - Mello PA AU - Imry Y AU - Shapiro B AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoWeizmann Inst Sci, Dept Phys, IL-76100 Rehovot, IsraelTechnion Israel Inst Technol, Dept Phys, IL-32000 Haifa, IsraelMello, PA, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Model for phase breaking in the electronic conduction in mesoscopic systems AB - We study the problem of electronic conduction in mesoscopic systems when the electrons are allowed to interact not only with static impurities, but also with a scatterer [a phase breaker (PB)] that possesses internal decrees of freedom. We first analyze the role of the PB in reducing the coherent interference effects in a one-electron quantum-mechanical system. In the many-electron system we can make a number of quite general statements within the framework of linear-response theory and the random-phase approximation. We cannot calculate the conductivity tensor in full generality: we thus resort to a model in which that tensor can be expressed entirely in a single-electron picture. The resulting conductance is a bilinear expression in the single-electron transmission matrix, containing an additional trace over the states of the PB MH - Israel MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000088008400042 L2 - QUANTUM TRANSPORT; CHAOTIC CAVITIES; MATRIX THEORY; INTERFERENCE; COHERENT; FORMULA SO - Physical Review B 2000 ;61(24):16570-16581 1288 UI - 16588 AU - Melnick J AU - Terlevich R AU - Terlevich E AD - European So Observ, Santiago, ChileUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoMelnick, J, European So Observ, Alonso de Cordova 3107, Santiago, Chile TI - HII galaxies as deep cosmological probes AB - We re-investigated the use of the Hubble diagram to measure the cosmological constant (Lambda) and the mass density of the Universe (Omega(M)). We find an important focusing effect in Lambda for redshifts of about 3. This effect implies that the apparent magnitude of a standard candle at redshifts z=2-3 has almost no dependence on Lambda for Omega(M)> 0.2. This means that Omega(M) can be measured independently of Omega(Lambda) by targeting the redshift range according to an estimate of the value of Omega(M). We explore the evidence in support of the suggestion that extreme starburst galaxies, also known as H II galaxies, can be used as distance estimators over a wide range of redshifts and reaching very high values. We have compiled literature data of H II galaxies up to z similar to 3 and found a good correlation between their luminosity and velocity dispersion measured from their strong emission lines, thus confirming the correlation already known to exist for H II galaxies in the nearby Universe. Several systematic effects, such as age, extinction, kinematics and metallicity, are discussed, as well as the effects of different cosmologies MH - Chile MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000084867400018 L2 - HII regions;galaxies : fundamental parameters;galaxies : ISM;galaxies : irregular;cosmology : miscellaneous;distance scale;EMISSION-LINE GALAXIES; H-II REGIONS; SUPERNOVAE; CONSTANT; UNIVERSE SO - Monthly Notices of the Royal Astronomical Society 2000 ;311(3):629-635 1289 UI - 14313 AU - Mendes-Giannini MJS AU - Taylor ML AU - Bouchara JB AU - Burger E AU - Calich VLG AU - Escalante ED AU - Hanna SA AU - Lenzi HL AU - Machado MP AU - Miyaji M AU - Da Silva JLM AU - Mota EM AU - Restrepo A AU - Restrepo S AU - Tronchin G AU - Vincenzi LR AU - Xidieh CF AU - Zenteno E AD - Univ Estadual Paulista, Fac Ciencias Farmaceut, Araraquara, SP, BrazilUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoCHU Angers, Lab Parasitol Mycol, Grp Etud Interact Hote Parasite, Angers, FranceUniv Sao Paulo, Inst Ciencias Biomed, Dept Imunol, BR-05508 Sao Paulo, BrazilInst Oswaldo Cruz, Dept Patol, BR-20001 Rio De Janeiro, BrazilChiba Univ, Pathogen Fungi & Microbial Toxicoses Res Ctr, Chiba 280, JapanCorp Invest Biol, Medellin, ColombiaMendes-Giannini, MJS, Fac Ciencias Farmaceut Araraquara, Dept Anal Clin, Rua Expedicionarios Brasil 1621, BR-14801902 Araraquara, Brazil TI - Pathogenesis II: Fungal responses to host responses: interaction of host cells with fungi AB - Most of our knowledge concerning the virulence determinants of pathogenic fungi comes from the infected host, mainly from animal models and more recently from in vitro studies with cell cultures. The fungi usually present intra- and/or extracellular host-parasite interfaces, with the parasitism phenomenon dependent on complementary surface molecules. Among living organisms, this has been characterized as a cohabitation event, where the fungus is able to recognize specific host tissues acting as an attractant, creating stable conditions for its survival. Several fungi pathogenic for humans and animals have evolved special strategies to deliver elements to their cellular targets that may be relevant to their pathogenicity. Most of these pathogens express surface factors that mediate binding to host cells either directly or indirectly, in the latter case binding to host adhesion components such as extracellular matrix (ECM) proteins, which act as 'interlinking' molecules. The entry of the pathogen into the host cell is initiated by fungal adherence to the cell surface, which generates an uptake signal that may induce its cytoplasmic internalization. Once this is accomplished, some fungi are able to alter the host cytoskeletal architecture, as manifested by a rearrangement of microtubule and microfilament proteins, and this can also induce epithelial host cells to become apoptotic. It is possible that fungal pathogens induce modulation of different host cell pathways in order to evade host defences and to foster their own proliferation. For a number of pathogens, the ability to bind ECM glycoproteins, the capability of internalization and the induction of apoptosis are considered important factors in virulence. Furthermore, specific recognition between fungal parasites and their host cell targets may be mediated by the interaction of carbohydrate-binding proteins, e.g., lectins on the surface of one type of cell, probably a parasite, that combine with complementary sugars on the surface of host-cell. These interactions supply precise models to study putative adhesins and receptor-containing molecules in the context of the fungus-host interface. The recognition of the host molecules by fungi such as Aspergillus fumigatus, Paracoccidioides brasiliensis and Histoplasma capsulatum, and their molecular mechanisms of adhesion and invasion, are reviewed in this paper MH - Brazil MH - Colombia MH - France MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: B I O S SCIENTIFIC PUBLISHERS LTD RP - NOT IN FILE U3 - TC 22 U4 - Mycology;Veterinary Sciences U5 - J;Article AV - English IS - 1369-3786 UR - ISI:000166958800013 L2 - Aspergillus fumigatus;fungus interaction;Histoplasma capsulatum;Paracoccidioides brasiliensis;ASPERGILLUS-FUMIGATUS CONIDIA; PARACOCCIDIOIDES-BRASILIENSIS CONIDIA; EXTRACELLULAR-MATRIX PROTEINS; ACID-DEPENDENT RECOGNITION; HISTOPLASMA-CAPSULATUM; PULMONARY FIBROSIS; MEMBRANE PROTEINS; GLYCOPROTEIN GP43; CANDIDA-ALBICANS; EUTHYMIC MICE SO - Medical Mycology 2000 ;38():113-123 1290 UI - 16101 AU - Mendez-Alcaraz JM AU - Klein R AD - IPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoUniv Konstanz, Fak Phys, D-78457 Constance, GermanyMendez-Alcaraz, JM, IPN, CINVESTAV, Dept Fis, Ave IPN 2508,Col San Pedro Zacatenco, Mexico City 07300, DF, Mexico TI - Depletion forces in colloidal mixtures AB - Depletion forces are accounted for by a contraction of the description of colloidal mixtures based on the integral equations theory of simple liquids. The applicability of this treatment is illustrated for binary mixtures of hard spheres, in the bull; and near a hard wall. The Asakura and Oosawa potential is obtained as the dilute limit of our equations. At higher concentrations the depletion potential has an oscillatory behavior and becomes more long ranged. If charge is put on the small particles there are energy-driven depletion forces in addition to those of entropic origin, which result in repulsive interaction at contact MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 42 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000086597300014 L2 - HARD-SPHERE FLUIDS; PHASE-SEPARATION; INTEGRAL-EQUATION; POLYMERS; PARTICLES; POTENTIALS; CONSISTENT; SYSTEMS SO - Physical Review e 2000 ;61(4):4095-4099 1291 UI - 14993 AU - Mendez-Garcia VH AU - Centeno AP AU - Lopez-Lopez M AU - Tamura M AU - Momose K AU - Ojima K AU - Yonezu H AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoToyohashi Univ Technol, Dept Elect & Elect Engn, Toyohashi, Aichi 441, JapanLopez-Lopez, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 17-740, Mexico City 07000, DF, Mexico TI - Improvement in the crystal quality of ZnSe films on Si(111) substrates with a nitrogen surface treatment AB - We have achieved a significant improvement in the crystal quality of ZnSe films grown by pulsed molecular beam epitaxy (MBE) on Si(lll) by irradiating the substrates with a plasma of nitrogen (N-plasma) prior to the deposition. Reflection high-energy electron diffraction (RHEED) patterns during the pulsed MBE growth on the N-plasma-treated Si surface showed very well defined streaks with a twofold reconstruction indicating an atomically flat surface. In sharp contrast spotty RHEED patterns with a diffuse background were observed during the initial stages of the conventional MBE growth of ZnSe on untreated substrates, indicating an initial three-dimensional growth mode. Atomic force microscopy confirmed a smoother surface for the samples grown on the N-plasma-treated Si substrates. Moreover, transmission electron microscopy revealed a decrease in the density of crystal defects in the ZnSe epilayers by the use of the N-plasma treatment. (C) 2000 Elsevier Science S.A. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900009 L2 - molecular-beam epitaxy;ZnSe;Si;surface treatment;MOLECULAR-BEAM EPITAXY; SI(100) SURFACE; GROWTH; SI; INTERFACE; TEMPERATURE; CELLS; GAAS SO - Thin Solid Films 2000 ;373(1-2):33-36 1292 UI - 13856 AU - Mendez-Gonzalez M AU - Cauich-Rodriguez JV AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Dept Ciencias Mat, Mexico City, DF, MexicoCtr Invest Cientif Yucatan, Lab Polimeros, Unidad Mat, Merida 97310, VenezuelaMendez-Gonzalez, M, Inst Politecn Nacl, Escuela Super Fis & Matemat, Dept Ciencias Mat, Apdo Postal 75-525,Col Lindavista 07300, Mexico City, DF, Mexico TI - Preparation of porous hydroxyapatite tablets and porous hydroxyapatite coatings for orthopaedic use AB - Porous hydroxyapatite tablets and porous hydroxyapatite coatings on metal substrates were obtained by the addition of polymeric additives and liofilization. Hydroxyapatite coatings on either stainless steel or titanium were obtained by both plasma spraying and laser ablation. Both tablets and coatings were characterised by scanning electron microscopy and X-ray diffraction. Tablets obtained with either PVA or CMC as a polymeric additive and thermally treated at 400 degreesC exhibited an interconnected porous structure of approximately 40 mum On the other hand, tablets containing PVP and thermally treated at 200 degreesC showed interconnected pores of 50 mum. In both cases, crystallinity was not altered during the heat treatment. It was concluded that porous hydroxyapatite obtained as tablets or coatings on metal substrates are potential candidates for using them in medicine in applications such as fillers of osseous cavities and implants of improved biocompatibility. Their interconnected porous structure resemble natural bone allowing not only bone in growth but also the creation of a better interface between bone and an implant MH - Mexico|Distrito Federal MH - Venezuela PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics;Materials Science, Composites U5 - S;Article AV - English IS - 1013-9826 UR - ISI:000168303700065 L2 - biocompatibility;bone cements;hydroxyapatite HA;osseous environment;porous SO - Bioceramics 2000 ;192-1():259-261 1293 UI - 16660 AU - Mendez-Vivar J AU - Mendoza-Bandala A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoMendez-Vivar, J, Metropolitan Museum Art, Sherman Fairchild Ctr Objects Conservat, 1000 5th Ave, New York, NY 10028 USA TI - Spectroscopic study on the early stages of the polymerization of hybrid TEOS-RSi (OR ')(3) sols AB - A spectroscopic study of sols composed of tetraethyl orthosilicate and alkyl alkoxysilanes was performed. The molar ratio range studied was 95-60 for tetraethyl orthosilicate and 5-40 for the alkyl alkoxysilanes. The Si-29 Nuclear Magnetic Resonance high resolution study along the first 20 h of the polymerization allowed us to demonstrate that cross-condensation predominated over self-condensation in the tetraethyl orthosilicate-methyl triethoxysilane and tetraethyl orthosilicate-phenyl triethoxysilane sols, compared to tetraethyl orthosilicate-ethyl triethoxysilane in the conditions studied. These results were consistent with the small angle X-ray scattering results, where two types of growing olygomeric species were found: those with a fractal dimension value D-f = 2.3, corresponding to randomly branched olygomers, and the others with a fractal dimension value D-f = 1.8; corresponding to multiparticle diffusion limited aggregates. Inspite of performing a complete Fourier transform infrared spectroscopy study from sols to gels, only slight differences were found in the spectra. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000084760200015 L2 - GEL POLYMERIZATION; HYDROLYSIS SO - Journal of Non-Crystalline Solids 2000 ;261(1-3):127-136 1294 UI - 16088 AU - Mendez F AU - Trevino C AD - Natl Autonomous Univ Mexico, Fac Ingn, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoTrevino, C, Univ Politecn Madrid, ETSI Aeronaut, Dept DMT, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain TI - The conjugate conduction-natural convection heat transfer along a thin vertical plate with non-uniform internal heat generation AB - The steady state heat transfer characteristics of a thin vertical strip with internal heat generation is studied in this work. The nondimensional temperature distribution in the strip is obtained as a function of the following parameters: (a) the intensity and distribution of the internal heat sources, (b) the aspect ratio of the strip, (c) the longitudinal heat conductance of the strip and (d) the Prandtl number of the fluid. Both the thermally thin and the thick wall approximations are considered in this paper. The total thermal energy or averaged temperature of the strip is found to decrease as the influence of the longitudinal heat conduction effects in the strip decreases in the thermally thin wall regime. After reaching a minimum, it increases again in the thermally thick wall regime. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Thermodynamics;Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0017-9310 UR - ISI:000086705900010 L2 - natural cooling;heated slab;conjugate heat transfer;SURFACE; CHIPS SO - International Journal of Heat and Mass Transfer 2000 ;43(15):2739-2748 1295 UI - 14458 AU - Mendez N AU - Linke-Gamenick I AU - Forbes VE AD - UNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Lab Invertebrados Benton, Mazatlan 82000, Sinaloa, MexicoRoskilde Univ, Dept Chem & Life Sci, DK-4000 Roskilde, DenmarkMendez, N, UNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Lab Invertebrados Benton, Apdo Postal 811, Mazatlan 82000, Sinaloa, Mexico TI - Variability in reproductive mode and larval development within the Capitella capitata species complex AB - A comparative analysis was carried out of reproductive mode, larval development pattern, and larval growth rate under identical conditions of three members of the Capitella capitata species complex: Capitella sp I from New York, US, Capitella sp M from shallow hydrothermal vents off Milos, Greece, and Capitella sp S from an intertidal flat on Sylt, Germany. In addition, three populations from salmon farms, Capitella K (Kilmelford, Scotland), Capitella Cm and Capitella Ct (Cranford, Ireland), are described for the first time. Three development patterns were observed: planktotrophic (Capitella K and Ct populations), lecithotrophic (Capitella spp I, M and Cm populations), and direct development (Capitella sp S). Experiments with planktotrophic larvae from the Capitella K population at different temperatures, in the presence and absence of light and with several kinds of substrate were not successful in inducing settlement, although differences in the duration of larval survival were observed. Overall, major differences in reproductive modes and larval development patterns were observed among representatives of different species and populations reared under identical culture conditions. In contrast, such modes and patterns are consistent across generations. Whereas larval type and developmental mode appear to be determined largely by genetic factors, environmental conditions have an important influence on the timing of key developmental processes, such as settling and growth MH - Denmark MH - Mexico|Sinaloa PB - REHOVOT: INT SCIENCE SERVICES/BALABAN PUBLISHERS RP - NOT IN FILE U3 - TC 15 U4 - Reproductive Biology;Zoology U5 - J;Article AV - English IS - 0168-8170 UR - ISI:000166531800008 L2 - Polychaeta;Capitella capitata;reproductive modes;larval development;sibling species;fish farms;POPULATION-DYNAMICS; LITTORAL-ZONE; LIFE-HISTORY; SP-I; POLYCHAETA; BARCELONA; SPAIN; ANNELIDA; SEA SO - Invertebrate Reproduction & Development 2000 ;38(2):131-142 1296 UI - 15604 AU - Mendiola-Olaya E AU - Valencia-Jimenez A AU - Valdes-Rodriguez S AU - ano-Frier J AU - Blanco-Labra A AD - IPN, Ctr Invest & Estudios Avanzados, Dept Biotechnol & Biochem, Unidad Biotecnol & Ingn Genet Plantas, Irapuato 36500, Gto, MexicoUniv Caldas, Fac Ciencias Exactas & Nat, Manizales, ColombiaBlanco-Labra, A, IPN, Ctr Invest & Estudios Avanzados, Dept Biotechnol & Biochem, Unidad Biotecnol & Ingn Genet Plantas, Apto Postal 629, Irapuato 36500, Gto, Mexico TI - Digestive amylase from the larger grain borer, Prostephanus truncatus Horn AB - A combination of ion-exchange chromatography, preparative electrophoresis and gel filtration chromatography allowed a 1209-fold purification of one of the two major digestive alpha-amylases from larvae of the larger grain borer, Prostephanus truncatus Horn. The purified enzyme showed a molecular mass of 60.2 kDa, an isoelectric point of 4.7 and an optimal pH for activity of 6.0. The enzyme was heat labile and it was recognized by proteinaceous inhibitors from amaranth seeds (Amaranthus hypochondriacus), whereas extracts from maize (Zea mays) and tepary bean (Phaseolus acutifolius) produced very low inhibition. When the enzyme was measured at different stages of development, maximal activity was found in the second instar larvae. Activity drastically decreased to a very low level during the pupae stage and increased again at the adult stage. A zymogram of the different developmental stages showed two main bands of a-amylase activity, which almost disappeared at the pupae stage to increase again during the adult stage, revealing a new, smaller band. This new band may be required for a better adaptation of the adult insect to its new environment. (C) 2000 Elsevier Science Inc. All rights reserved MH - Colombia MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 0305-0491 UR - ISI:000088315400017 L2 - alpha-amylase;insect enzymes;larger grain borer;Prostephanus truncatus;enzyme purification;amylase inhibitors;stored products;insect pests;ALPHA-AMYLASE; PROTEINACEOUS INHIBITORS; SITOPHILUS-GRANARIUS; COLEOPTERA; PURIFICATION; BOSTRICHIDAE; LARVAE; SEEDS; PROTEASE; MIDGUTS SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2000 ;126(3):425-433 1297 UI - 15345 AU - Mendizabal E AU - Flores J AU - Puig JE AU - Katime I AU - Lopez-Serrano F AU - Alvarez J AD - Univ Pais Vasco, Dept Quim Fis, E-48080 Bilbao, SpainUniv Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoInd Resistol SA de CV, Lerma, Estado Mexico, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Ingn Proc, Mexico City 09340, DF, MexicoPuig, JE, Univ Pais Vasco, Dept Quim Fis, Campus Leioa,Apdo Postal 644, E-48080 Bilbao, Spain TI - On the modeling of microemulsion polymerization. Experimental validation AB - A recently developed model for o/w microemulsion polymerization, tested only with styrene, is validated here by comparing its predictions with experimental data from the polymerization of three monomers with different chemical structures and water solubilities. The model reproduces well the kinetic data as well as the characteristics of the latex and polymer (particle size, average molar mass, number of polymer chains per particle, etc.) for the three monomers. The model predicts only two reaction rate intervals and that the conversion at which the maximum reaction rate occurs, depends only on the type of monomer and reaction conditions, in agreement with experimentally reported data. In the model, both micellar and homogeneous nucleation mechanisms are permitted, even for low water-solubility monomers such as styrene, because of the large amounts of surfactant typically employed in microemulsion polymerization. The role of these two mechanisms in the polymerization process is examined here MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Jalisco MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1352 UR - ISI:000088962700008 L2 - EMULSION POLYMERIZATION; BUTYL ACRYLATE; METHACRYLATE; STYRENE; NUCLEATION SO - Macromolecular Chemistry and Physics 2000 ;201(12):1259-1265 1298 UI - 16242 AU - Mendoza-Franco E AU - Vidal-Martinez V AU - guirre-Macedo L AU - Rodriguez-Canul R AU - Scholz T AD - IPN, CINVESTAV, Natl Polytech Inst, Ctr Res & Adv Studies,Lab Parasitol, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicMendoza-Franco, E, IPN, CINVESTAV, Natl Polytech Inst, Ctr Res & Adv Studies,Lab Parasitol, Carretera Antigua Progreso Km 6,AP 73, Merida 97310, Yucatan, Mexico TI - Species of Sciadicleithrum (Dactylogyridae : Ancyrocephalinae) of cichlid fishes from southeastern Mexico and Guatemala: New morphological data and host and geographical records AB - A survey of species of Sciadicleithrum (Monogenea: Dactylogyridae) from the gills of cichlid fishes from the Yucatan Peninsula of Mexico and neighboring regions is provided. Sciadicleithrum mexicanum Kritsky, Vidal-Martinez, and Rodriguez-Canul is reported from Cichlasoma urophthalmus (type host), Cichlasoma aureum, and Petenia splendida (new host records) from Mexico, and Cichlasoma trimaculatum from Guatemala (new host and geographical record); Sciadicleithrum bravohollisae Kritsky, Vidal-Martinez, and Rodrigues-Canul from Cichlasoma geddesi, Cichlasoma lentiginosum, Cichlasoma managuense, Cichlasoma salvini, and Cichlasoma sp. (all new host records); Sciadicleithrum splendidae Kritsky, Vidal-Martinez, and Rodriguez-Canul from Cichlasoma friedrichstahli and C. managuense (new host records); and Sciadicleithrum meekii Mendoza-Franco, Scholz, and Vidal-Martinez from Cichlasoma callolepis, Cichlasoma helleri, and C. managuense (new host records) from Mexico. Data on morphological and biometrical variability of individual species from different hosts are provided. Species of Sciadicleithrum from Mexico and Guatemala exhibit wide host specificity. The present records expand distributional areas of all of the species of Sciadicleithrum studied MH - Czech Republic MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 9 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1049-233X UR - ISI:000086297400010 L2 - Sciadicleithrum;Monogenea;Dactylogyridae;Cichlidae;host specificity;zoogeography;Mexico;Guatemala;YUCATAN PENINSULA; MONOGENEA; GILLS SO - Comparative Parasitology 2000 ;67(1):85-91 1299 UI - 16599 AU - Mendoza-Gonzalez AC AU - Mateo-Cid LE AU - Searles RB AD - Duke Univ, Dept Bot, Durham, NC 27708, USAIPN, Escuela Nacl Ciencias Biol, Dept Bot, Lab Ficol, Mexico City 11340, DF, MexicoSearles, RB, Duke Univ, Dept Bot, Box 90338, Durham, NC 27708, USA TI - New records of benthic marine algae from Isla Cozumel, Mexico: Phaeophyta and Chlorophyta AB - Waters off the island of Cozumel on the east coast of the Yucatan peninsula in Mexico were investigated using SCUBA. Species recorded here supplement earlier reports of seaweeds collected in shallow water from this Caribbean island. Twenty-three taxa of Phaeophyta and 72 Chlorophyta were collected. We record for the first time on Cozumel ten species of Phaeophyta and 24 species, three varieties and four forms of Chlorophyta. Four of the brown algal records and 16 of the green algal records are new records for Mexico. Collections of Onslowia bahamaensis are the first outside of the Bahamas where it was originally described in 1978. The reports of Entocladia ventriculosa, Penicillus dumestosus f. expansus, and P. pyriformis f. explanatus are the first since Borgesen's original description of them from the Virgin Islands early in the century. We also report Trichosolen blomquistii for the first time outside of Puerto Rico. The reports of Rhipiliopsis profunda from 27-30 m are by far the shallowest depths in which this deep-water alga has been collected and are the only records of this species outside of the Bahamas, where it was originally described and Puerto Rico MH - Mexico|Distrito Federal MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000084930600009 L2 - TROPICAL WESTERN ATLANTIC; BRYOPSIDALES; SYSTEMATICS; HALIMEDA; BAHAMAS SO - Bulletin of Marine Science 2000 ;66(1):119-130 1300 UI - 15630 AU - Mendoza-Suarez G AU - Davies HA AU - Escalante-Garcia JI AD - Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandMendoza-Suarez, G, CINVESTAV, Carr Saltillo Mty,Apdo Postal 663, Mexico City, DF, Mexico TI - H-j(c), J(r) and (BH)(max) relationship in PrFeB melt spun alloys AB - H-j(o), J(r) and (BH)(max) correlations were experimentally studied for a series of PrxFe94-xB6 alloys, with x ranging from 6 to 20 at%. The results show that the variation of the Pr content and the casting parameters yielded to H-j(c) ranging from values near 0 to similar to 2200 kA/m. J(r) increased at the expense of H-j(c) in agreement with some theoretical investigations related to J(r)/H-j(c) relationship. This behaviour changed for H-j(c) values lower than similar to 200kA/m, where J(r) and H-j(c) diminish together. (BH)(max) showed a similar behaviour to J(r) up to values of H-j(c) similar to 450kA/m (30% alpha-Fe) where a maximum was observed and then a decrease with reducing H-j(c). The results are analysed and discussed based on theoretical and experimental investigations carried out by some other workers and compared with results reported for the NdFeB system. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000088216400015 L2 - alloys;magnetic properties relationship;MAGNETIC-PROPERTIES; PERMANENT-MAGNETS; REMANENCE; ENHANCEMENT SO - Journal of Magnetism and Magnetic Materials 2000 ;218(1):97-102 1301 UI - 15434 AU - Mendoza RN AU - Medina TIS AU - Vera A AU - vila-Rodriguez M AU - Guibal E AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, MexicoEcole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, France TI - Extraction of Cr(III) with XAD-2 resin impregnated with Cyanex 272 MH - France MH - Mexico|Guanajuato PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246104094 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U761-U761 1302 UI - 16342 AU - Mendoza RN AU - Medina TIS AU - Vera A AU - Rodriguez MA AU - Guibal E AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36040, Gto, MexicoEcole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, FranceMendoza, RN, Univ Guanajuato, Inst Invest Cient, Cerro Venada S-N, Guanajuato 36040, Gto, Mexico TI - Study of the sorption of Cr(III) with XAD-2 resin impregnated with di-(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272) AB - Solvent impregnated resin containing Cyanex 272 (di-(2,4,4-trimethylpentyl)phosphinic acid, denoted HL) was prepared by adsorption of the organophosphorus extractant into the polymeric macroporous support Amberlite XAD-2. The extraction of Cr(III) from nitrate solution at 0.1 ionic strength by the impregnated resin has been studied at 25 degrees C. The sorption of the metal ion was studied as a function of both pH and extractant concentration in the resin phase. The impregnated resin shows good affinity towards the extraction of Cr(III). The best sorption efficiency (98%) was obtained at pH approximate to 5. A thermodynamic model is proposed for modeling the distribution data. This model shows that Cr(III) is extracted as Cr(OH)(HL)(2)(NO3)(2) and Cr(OH)L-2. The elution of the metal from the resin was accomplished (95%) with 6.0 M HCl. The elution treatment allows the impregnated resin to be reused MH - France MH - Mexico|Guanajuato PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0736-6299 UR - ISI:000085910000006 L2 - EXTRACTION; EQUILIBRIUM; SEPARATION; ADSORPTION; IRON(III); CHITOSAN; METALS; IONS SO - Solvent Extraction and Ion Exchange 2000 ;18(2):319-343 1303 UI - 14787 AU - Meng E AU - Longmire J AU - Moldashev A AD - CIMMYT, Int Ctr Maize & Wheat Improvement, Mexico City 06600, DF, MexicoUniv So Queensland, Fac Business, Dept Econ & Resources Management, Toowoomba, Qld 4350, AustraliaKazakhstan Sci Res Inst Agr Econ, Natl Acad Ctr Agrarian Res, Dept Vert Integrat, Almaty 480057, KazakhstanMeng, E, CIMMYT, Int Ctr Maize & Wheat Improvement, Apartado Postal 6-641, Mexico City 06600, DF, Mexico TI - Kazakhstan's wheat system: priorities, constraints, and future prospects AB - This paper provides an overview of Kazakhstan's wheat system following independence and identifies policies and constraints currently influencing the operation and development of the system. It also looks at the factors affecting production decisions, including the current operating environment, intra-sectoral linkages, and overall macroeconomic conditions and identifies several alternative sources of productivity growth that can potentially improve the current and future competitiveness of Kazakhstan's wheat producers. The paper emphasizes that the wheat system cannot operate in isolation from the rest of the economy. Regaining lost levels of productivity can only be accomplished with some level of coordinated policy Linking the priorities of the wheat system with those of the agricultural sector and the economy as a whole. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Australia MH - Kazakhstan MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Agricultural Economics & Policy;Economics;Food Science & Technology;Nutrition & Dietetics U5 - J;Article NT - DUPLICATE AV - English IS - 0306-9192 UR - ISI:000165622000006 L2 - policy reforms;wheat production;agricultural productivity;Kazakhstan;Central Asia SO - Food Policy 2000 ;25(6):701-717 1304 UI - 15959 AU - Menu-Marque S AU - Morrone JJ AU - de Mitrovich CL AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoUniv Nacl Tucuman, Fac Ciencias Nat, ILINOA, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaUniv Nacl Tucuman, Inst Miguel Lillo, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaMenu-Marque, S, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, Ciudad Univ,Pabellon 2,4to Piso, RA-1428 Buenos Aires, DF, Argentina TI - Distributional patterns of the South American species of Boeckella (Copepoda : Centropagidae): A track analysis AB - South American species of the freshwater copepod genus Boeckella are distributed in the Andean region, which corresponds to southwestern South America below 30 degrees south latitude, also extending along the Andean highlands north of this latitude, and comprises the Subantarctic, Central Chilean. Patagonian, and Paramo-Puna subregions. Based on a track analysis, five generalized tracks were found: Subantarctic (involving some Subantarctic islands, the Falklands, Tierra del Fuego, and the southern portion of continental Chile and Argentina): B. brevicaudata, B. poppei. B. vallentini, and and B. michaelseni: Patagonian (in the southern Patagonia plateau): B. brasiliensis. B. silvestrii vestrii. and B. longicauda; Mid-southern Andes: B. gibbosa and B. diamantina; Paramo-Punan (in the central and northern Andes, from northwestern Argentina to western Colombia): B. calcaris, B. palustris, and B. occidentalis; and Neotropical (mainly in the Neotropical region, but reaching also Patagonia and the Puna): B. meteoris and B. bergi. Two nodes have been determined: one in southern Chile and Argentina, where the Subantarctic, Patagonian, and Neotropical tracks intersect, and the other in the central Andes. where the Paramo-Punan and Neotropical tracks intersect MH - Argentina MH - Mexico|Distrito Federal PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 12 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000087125200007 L2 - HISTORICAL BIOGEOGRAPHY; CRUSTACEA; ZOOPLANKTON; ANTARCTICA; LAKES; POPULATION; CALANOIDA; ISLAND; ANDES SO - Journal of Crustacean Biology 2000 ;20(2):262-272 1305 UI - 15181 AU - Mercado A AU - Song LY AU - Vazquez N AU - Mount DB AU - Gamba G AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 14000, DF, MexicoVanderbilt Univ, Med Ctr, Dept Med, Div Nephrol & Hypertens, Nashville, TN 37232, USAGamba, G, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Functional comparison of the K+-Cl- cotransporters KCC1 and KCC4 AB - The K+-Cl- cotransporters (KCCs) are members of the cation-chloride cotransporter gene family and fall into two phylogenetic subgroups: KCC2 paired with KCC4 and KCC1 paired with KCC3. We report a functional comparison in Xenopus oocytes of KCC1 and KCC4, widely expressed representatives of these two sub groups. KCC1 and KCC4 exhibit differential sensitivity to transport inhibitors, such that KCC4 is much less sensitive to bumetanide and furosemide. The efficacy of these anion inhibitors is critically dependent on the concentration of extracellular K+, with much higher inhibition in 50 mM K+ versus 2 mM K+. KCC4 is also uniquely sensitive to 10 mM barium and to 2 mM trichlormethiazide, Kinetic characterization reveals divergent affinities for K+ (K-m values of similar to 25.5 and 17.5 mM for KCC1 and KCC4, respectively), probably due to variation within the second transmembrane segment. Although the two isoforms have equivalent affinities for Cl-, they differ in the anion selectivity of K+ transport (Cl- > SCN- = Br- > PO4-3 > I- for KCC1 and Cl- > Br- > PO4-3 = I- > SCN- for KCC4). Both KCCs express minimal K+-C1- cotransport under isotonic conditions, with significant activation by cell swelling under hypotonic conditions. The cysteine-alkylating agent N-ethylmaleimide activates K+-Cl- cotransport in isotonic conditions but abrogates hypotonic activation, an unexpected dissociation of N-ethylmaleimide sensitivity and volume sensitivity. Although KCC4 is consistently more volume-sensitive, the hypotonic activation of both isoforms is critically dependent on protein phosphatase 1. Overall, the functional comparison of these cloned K+-Cl- cotransporters reveals important functional, pharmacological, and kinetic differences with both physio logical and mechanistic implications MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 66 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000089577900057 L2 - PASSIVE K/CL TRANSPORT; SHEEP RED-CELLS; THICK ASCENDING LIMB; PROTEIN PHOSPHATASES; BASOLATERAL MEMBRANE; MOLECULAR-CLONING; CHLORIDE TRANSPORT; BUMETANIDE BINDING; HUMAN ERYTHROCYTES; N-ETHYLMALEIMIDE SO - Journal of Biological Chemistry 2000 ;275(39):30326-30334 1306 UI - 16120 AU - Mercado A AU - Mount DB AU - Vazquez N AU - Song LY AU - Gamba G AD - UNAM, Inst Invest Biomed, Mexico City, DF, MexicoINNSZ, Mexico City, DF, MexicoVanderbilt Univ, Med Ctr, Nashville, TN, USA TI - Functional characteristics of renal KCCs MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918101968 SO - Faseb Journal 2000 ;14(4):A341-A341 1307 UI - 15968 AU - Mercado I AU - Garcia-Calderon N AU - Ibanez A AU - Martin F AD - Natl Autonomous Univ Mexico, Fac Ciencia, Lab Edafol, Mexico City 04510, DF, MexicoCSIC, Inst Recursos Nat & Agrobiol, E-41080 Seville, SpainMercado, I, Natl Autonomous Univ Mexico, Fac Ciencia, Lab Edafol, Circuito Exterior S-N, Mexico City 04510, DF, Mexico TI - Composition of soil lipids in two Chinampas agroecosystems from Xochimilco and Tlahuac Municipalities, Mexico AB - The Chinampas are important historically and represent a special agroecosystem that has been sustainable for many years. However, their agricultural potential has currently decreased mainly because of irrigation with waste water from Mexico City, leading to progressive salinity and alkalinity problems and the subsequent general alteration on the agroecosystem. Chemical composition of the main groups of lipid molecules in anthropogenic organic soil from Xochimilco and Tlahuac Municipalities (Mexico) were investigated. The analysis performed included physicochemical characteristics of the soil and the distribution analysis of free alkanes and fatty acids. The successive accumulation stages of organic materials in these anthropogenic organic soils represent a source of irregular distribution in organic carbon, likewise the concentration of lipid extracts differed noticeably with depth. There is a vertical variability, where hydromorphic environment has played a key role in this variability. The major compounds identified in the soil lipid extracts by gas chromatography-mass spectrometry include series of linear and satured alkanes, fatty acids, as well as individual components such as sterols and hopanes. Most of the lipid components in these soil seem to have a biogenic origin (higher plants and microorganism biomass) MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences;Chemistry, Analytical;Soil Science U5 - J;Article AV - English IS - 0010-3624 UR - ISI:000087191100016 L2 - IRON SO - Communications in Soil Science and Plant Analysis 2000 ;31(7-8):1003-1016 1308 UI - 16254 AU - Metcalfe SE AU - O'Hara SL AU - Caballero M AU - Davies SJ AD - Univ Edinburgh, Dept Geog, Edinburgh EH8 9XP, Midlothian, ScotlandUniv Nottingham, Sch Geog, Nottingham NG7 2RD, EnglandUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoMetcalfe, SE, Univ Edinburgh, Dept Geog, Drummond St, Edinburgh EH8 9XP, Midlothian, Scotland TI - Records of Late Pleistocene-Holocene climatic change in Mexico - a review AB - Here we review palaeoclimatic records from Mexico which have a reasonable chronological framework and are readily accessible. Reconstructions are based on pollen, diatoms, sediment chemistry and isotopes, packrat middens and glacial records and are discussed within the context of Central Mexico, the Yucatan and Northern Mexico, the three regions for which significant information is available. The available data indicate that over the Late Pleistocene and Holocene there have been significant climatic changes in Mexico, although smaller in magnitude than in other parts of the northern hemisphere tropics and subtropics. Maps of conditions at 18,000, 9000, 6000, 5000 and 1000 yr BP are presented. These show that northern Mexico and the Yucatan often show opposite climatic signals, whilst the highlands of central Mexico are more variable. Around the Last Glacial Maximum it seems that the modern summer precipitation regime had collapsed. Northern Mexico, however, was much wetter than today due to increased winter rainfall. Modern rainfall patterns were not fully established until after 9000 yr BP and generally wet conditions prevailed about 6000 yr BP. The mid-Holocene seems to have been a period of great climatic variability with a number of records showing oscillations between 6000 and 5000 yr BP. A period of marked aridity is recorded in the Yucatan and central Mexico about 1000 yr BP. More well-dated, continuous records are needed, especially covering the last glacial-interglacial transition. The changing balance between temperate and tropical climate systems and the influence of the Pacific compared with the Gulf of Mexico/Caribbean warrant further investigation. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 53 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Review AV - English IS - 0277-3791 UR - ISI:000086156800005 L2 - YUCATAN PENINSULA; UNITED-STATES; NORTH-AMERICA; INTERANNUAL VARIABILITY; VEGETATION HISTORY; GLACIAL SEQUENCE; VOLCANO AJUSCO; YOUNGER DRYAS; LAKE-CHALCO; BASIN SO - Quaternary Science Reviews 2000 ;19(7):699-721 1309 UI - 15431 AU - Meuzelaar HLC AU - Dworzanski JP AU - Sheya SN AU - Jeon SJ AU - Lighty J AU - Sarofim AF AU - Mejia-Velazquez GM AD - Univ Utah, Ctr Micro Anal & React Chem, Salt Lake City, UT 84112, USAUniv Utah, Dept Chem & Fuels Engn, Salt Lake City, UT 84112, USAITESM, Ctr Environm Qual, Monterrey, NL, Mexico TI - Rapid, measurement-based source apportionment of air particulate matter MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246103648 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U673-U673 1310 UI - 15872 AU - meyda-Artigas RJ AU - Bargues MD AU - Mas-Coma S AD - Univ Valencia, Fac Farm, Dept Parasitol, Valencia 46100, SpainAlmeyda-Artigas, RJ, Univ Autonoma Metropolitana Xochimilco, Dept El Hombre & Ambiente, Lab Sanidad Acuicola & Parasitol Mol, 1100 Colonia Villa Quietud, Mexico City 04960, DF, Mexico TI - ITS-2 rDNA sequencing of Gnathostoma species (Nematoda) and elucidation of the species causing human gnathostomiasis in the Americas AB - From several gnathostome species the complete internal transcribed spacer ITS-2 ribosomal DNA (rDNA) repeat sequence and a fragment of the 5.8S rDNA were obtained by direct polymerase chain reaction cycle-sequencing and silver-staining methods. The size of the complete ITS-1 sequence in agarose gel electrophoresis was also obtained. The ITS-2 enabled the differentiation of Gnathostoma spinigerum from Thailand and Gnathostoma binucleatum from Mexico and Ecuador and confirmed the validity of the latter. Gnathostoma turgidum, Gnathostoma sp. I (= Gnathostoma procyonis sensu Almeyda-Artigas ct al., 1994), and Gnathostoma sp. II(= G. turgidum sensu Foster, 1939 pro parte), all from Mexico, proved to be independent species, but Gnathostoma sp. III, also from Mexico, could not be differentiated from G. turgidum. In Mexico and Ecuador, gnathostomes involved in human infection and that had been classified as G. spinigerum belong to G. binucleatum. The 5.8S rDNA sequences of the 6 Gnathostoma species studied were identical. The results of the ITS-1 agreed with those results of ITS-2 MH - Mexico|Distrito Federal MH - Spain PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 25 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000087508400019 L2 - INTERNAL TRANSCRIBED SPACER; RIBOSOMAL DNA-SEQUENCE; MIGRATORY EOSINOPHILIC PANNICULITIS; TRICHOSTRONGYLUS NEMATODA; NECATOR-AMERICANUS; DIFFERENTIATION; STRONGYLOIDEA; POSITION; COMPLEX; MEXICO SO - Journal of Parasitology 2000 ;86(3):537-544 1311 UI - 15457 AU - Meza-Montes L AU - Izrailev FM AU - Ulloa SE AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Dept Phys & Astron, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAMeza-Montes, L, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Quantum-classical correspondence for two interacting particles in a one-dimensional box AB - We study the model of two interacting particles moving in a 1D box, paying main attention to the quantum-classical correspondence for the average shape of quantum eigenstates and for the local density of states (LDOS). We show that if the classical motion is chaotic, in a deep semi-classical region of a quantum system, both the shape of eigenstates and of the LDOS coincide with their classical analogs, on average. However, individual eigenstates exhibit quite large fluctuations which may not be treated as statistical ones. Thus, comparison of quantum quantities to the classical ones allows one to detect quantum effects of localization which for conservative systems emerge in the energy space MH - Mexico|Puebla MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800130 L2 - FINITE FERMI SYSTEMS; STATES; LOCALIZATION; SPACE; MODEL; CHAOS SO - Physica Status Solidi B-Basic Research 2000 ;220(1):721-727 1312 UI - 14898 AU - Meza-Toledo S AU - Bowery NG AD - Univ Birmingham, Dept Pharmacol, Birmingham B15 2TT, W Midlands, EnglandIPN, ENCB, Mexico City 06400, DF, Mexico TI - Baclofen inhibits electrically evoked GABA release from rat substantia nigra slices without evidence for autoreceptors MH - United Kingdom MH - Mexico|Distrito Federal PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0007-1188 UR - ISI:000090135300047 SO - British Journal of Pharmacology 2000 ;131():U29-U29 1313 UI - 16145 AU - Michaud F AU - Danobeitia JJ AU - Carbonell R AU - Bartolome R AU - Cordoba D AU - Delgado L AU - Nunez-Cornu F AU - Monfret T AD - Univ Paris 06, Geosci Azur, UMR 6526, F-06235 Villefranche Sur Mer, FranceCSIC, Inst Ciencias Tierra, Dept Geofis, E-08028 Barcelona, SpainUniv Complutense Madrid, Dept Geofis, E-28040 Madrid, SpainCtr Invest Cient & Educ Super Ensenada, Dept Geol, Ensenada 22830, Baja California, MexicoUniv Guadalajara, CCU Vallarta, Guadalajara 44430, Jalisco, MexicoMichaud, F, Univ Paris 06, Geosci Azur, UMR 6526, La Darse,BP 48, F-06235 Villefranche Sur Mer, France TI - New insights into the subducting oceanic crust in the Middle American Trench off western Mexico (17-19 degrees N) AB - We present new multibeam bathymetric and multichannel seismic data on the Middle American Trench, between 17 and 19 degrees N. These data show, north of the present tip of the East Pacific Rise, unsedimented seafloor with an abyssal hill fabric bare of sediments at the outer wall of the trench (18 degrees 30'N). Two multichannel seismic profiles orthogonal to the Middle American Trench display clear oceanic crust extending more than 20 km beneath the overriding plate. These seismic images suggest that the subducting oceanic crust along the Middle American Trench is younger than previously proposed. This result, therefore, implies a new location for the East Pacific Rise termination in relation to the trench. The subduction of this young oceanic crust off western Mexico provides new constraints on the deformation and magmatism of the western Mexican mainland. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Baja California MH - Mexico|Jalisco MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700009 L2 - East Pacific Rise;gravity;magnetics;Mexico;Middle America Trench;seismic reflection;subduction;EAST PACIFIC RISE; VOLCANIC BELT; NORTH-AMERICAN; COCOS PLATES; RIVERA; MIGRATION; JUNCTION; LAVAS; ZONES SO - Tectonophysics 2000 ;318(1-4):187-200 1314 UI - 14674 AU - Michel CR AU - Casan-Pastor N AD - Univ Guadalajara, CUCEI, Ctr Microscopia Elect, Guadalajara 44430, Jalisco, MexicoCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainMichel, CR, Univ Guadalajara, CUCEI, Ctr Microscopia Elect, Blvd M Garcia Barragan 1421, Guadalajara 44430, Jalisco, Mexico TI - Electrochemical oxygen intercalation in La2CuO4 prepared by nitrates method: Microstructural effects AB - In order to determine microstructural effects in the electrochemical oxygen intercalation for La2CuO4, and the relative abundance of the two superconducting phases (T-c=33 and 44K), this oxide was prepared using the nitrates method, which involves the dissolution of La and Cu oxides in nitric acid. The product was pressed as pellets. A narrow grain size distribution and a density higher than 95% rho (T) was obtained. After electrochemical oxygen intercalation, at room temperature, this material gave a main superconducting phase with T-c=33K, whereas porous pellets obtained from the same oxide, with intermediate grinding, gave a T-c=44K MH - Mexico|Jalisco MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000165855900215 L2 - OXIDATION SO - Physica C 2000 ;341():1977-1978 1315 UI - 15365 AU - Michiue Y AU - Brown F AU - Kimizuka N AU - Onoda M AU - Nakamura M AU - Watanabe M AU - Orita M AU - Ohta H AD - Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, JapanUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoHoya Corp, R&D Ctr, Akishima, Tokyo 1968510, JapanMichiue, Y, Natl Inst Res Inorgan Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan TI - Crystal structure of InTi0.75Fe0.25O3.375 and phase relations in the pseudobinary system InFeO3-In2Ti2O7 at 1300 degrees C AB - An average structure of incommensurately modulated monoclinic InTi0.75Fe0.25O3.375 was determined using single-crystal X-ray diffraction. Unit cell parameters are a = 5.9207(8), b = 3.4249(5), c = 6.3836(9), and beta = 107.96(1) with Z = 2, and the space group is C2/m. The structure with pseudorhombohedral symmetry involves two metal positions: M1, practically occupied by In, and M2, by Ti and Fe. Two layers are alternately stacked along the c axis; one is an edge-shared M1O(6) octahedral sheet and another consists of bipyramidal. coordination at M2 sites. In the bipyramidal layer, a honeycomb lattice 68% occupied by oxygen ions surrounds the M2 site. These oxygen ions are subsequently displaced from their original positions to reduce mutual repulsion. This explains large displacement parameters U-11 and U-22 despite the normal U-33 at the M2 site as well as at the oxygen site. Solid solution for the present phase is limited to InFeO3:In2Ti2O7 = 2:3 at 1300 degrees C according to a phase relations study in the pseudobinary system InFeO3-In2Ti2O7. We propose a hypothetical compound with an unusual ABO(3) structure based on a comparison of this compound and related structures MH - Japan MH - Mexico|Sonora PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000089028600027 L2 - INDIUM; OXIDE; IRON SO - Chemistry of Materials 2000 ;12(8):2244-2249 1316 UI - 14842 AU - Middleton D AU - Williams F AU - Meenagh A AU - Daar AS AU - Gorodezky C AU - Hammond M AU - Nascimento E AU - Briceno I AU - Perez MP AD - City Hosp, No Ireland Reg Histocompatibil & Immunogent Lab, Belfast BT9 7TS, Antrim, North IrelandQueens Univ Belfast, Belfast, Antrim, North IrelandUniv Ulster, Coleraine BT52 1SA, Londonderry, North IrelandSultan Qaboos Univ, Transplant Immunol Lab, Muscat, OmanInst Nacl Diagnost & Referencia Epidemiol, INDRE SSA, Dept Immunogenet, Mexico City, DF, MexicoNatal Inst Immunol, Transplantat Unit, Durban, South AfricaUniv Fed Minas Gerais, Hosp Sao Geraldo, Belo Horizonte, MG, BrazilUniv Fed Minas Gerais, Inst Biol Sci, Belo Horizonte, MG, BrazilUniv Javeriana, Unidad Clin Genet, Bogota, ColombiaPediat Hosp Juan Manuel Marquez, Havana, CubaMiddleton, D, City Hosp, No Ireland Reg Histocompatibil & Immunogent Lab, Belfast BT9 7TS, Antrim, North Ireland TI - Analysis of the distribution of HLA-A alleles in populations from five continents AB - The variation and frequency of HLA-A genotypes were established by PCR-SSOP typing in diverse geographically distributed populations: Brazilian, Colombian Kogui, Cuban, Mexican, Omani, Singapore Chinese, and South African Zulu. HLA-A allelic families with only one allele were identified for HLA-A*01, -A*23, -A*25, -A*31, -A*32, A*36, -A*43, -A*69, -A*80; and with two alleles for HLA-A*03, -A*11, -A*26, -A*29, -A*33, -A*34, and -A*66. Greater variation was detected for HLA-A*02, -A*24, and -A*68 allele families. Colombian Kogui and Mexican Seris showed the least diversity with respect to HLA-A alleles, albeit with small numbers rested, with only four and five HLA-A alleles identified, respectively. It would appear by their presence in all populations studied, either rural or indigenous, that certain alleles are very important in pathogen peptide presentation. (C) American Society for Histocompatibility and Immunogenetics, 2000. Published by Elscvier Science Inc MH - Brazil MH - Colombia MH - Cuba MH - Mexico|Distrito Federal MH - United Kingdom MH - Oman MH - South Africa PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 23 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000165419800011 L2 - high resolution DNA typing;HLA-A;SSOP;DONOR-RECIPIENT PAIRS; ETHNIC POPULATIONS; PCR-SSOP; FREQUENCIES; RESOLUTION; REGION SO - Human Immunology 2000 ;61(10):1048-1052 1317 UI - 16681 AU - Mielke EW AU - Schunck FE AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Sussex, Sch Chem Phys & Environm Sci, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandMielke, EW, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Boson stars: alternatives to primordial black holes? AB - The present surge for the astrophysical relevance of boson stars stems from the speculative possibility that these compact objects could provide a considerable fraction of the non-baryonic part of dark matter within the halo of galaxies. For a very Light 'universal' axiom of effective string models, their total gravitational mass will be in the most Likely range of similar to 0.5 M-. of MACHOs. According to this framework, gravitational microlensing is indirectly ''weighing'' the axion mass, resulting in similar to 10(-10) eV/c(2). This conclusion is not changing much, if we use a dilaton type self-interaction for the bosons. Moreover, we review their formation, rotation and stability as likely candidates of astrophysical importance. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 29 U4 - Physics, Particles & Fields U5 - J;Review AV - English IS - 0550-3213 UR - ISI:000084393800010 L2 - boson stars;axions;effective string models;dark matter;MACHOs;CLASSICAL FIELD-THEORY; AXI-DILATON GRAVITY; GENERAL-RELATIVITY; SOLITON STARS; SCALAR FIELD; NONTOPOLOGICAL SOLITONS; CATASTROPHE-THEORY; NEUTRON-STARS; FERMION STARS; STRING THEORY SO - Nuclear Physics B 2000 ;564(1-2):185-203 1318 UI - 16033 AU - Mielnik B AU - Nieto LM AU - Rosas-Ortiz O AD - Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainIPN, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoWarsaw Univ, Inst Theoret Phys, Warsaw, PolandNieto, LM, Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, Spain TI - The finite difference algorithm for higher order supersymmetry AB - The higher order supersymmetric partners of the Schrodinger's Hamiltonians can be explicitly constructed by iterating a simple finite difference equation corresponding to the Backlund transformation. The method can completely replace the Crum determinants. Its limiting, differential case offers some new operational advantages. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000086975400002 L2 - HYDROGEN-LIKE POTENTIALS; QUANTUM-MECHANICS; SCHRODINGER-EQUATION; FACTORIZATION METHOD; COHERENT STATES; TRANSFORMATION; SPECTRA SO - Physics Letters A 2000 ;269(2-3):70-78 1319 UI - 14906 AU - Miki-Yoshida M AU - Paraguay-Delgado F AU - Estrada-Lopez W AU - Andrade E AD - Ctr Invest Mat Avanzados, Dept Microscopia Elect, Chihuahua 31109, MexicoUniv Nacl Ingn, Fac Ciencias, Lima, PeruUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoMiki-Yoshida, M, Ctr Invest Mat Avanzados, Dept Microscopia Elect, Miguel de Cervantes 120, Chihuahua 31109, Mexico TI - Structure and morphology of high quality indium-doped ZnO films obtained by spray pyrolysis AB - Indium-doped zinc oxide thin films were prepared by spray pyrolytic decomposition of zinc acetate with indium acetate in an alcoholic solution. The films were deposited onto soda lime glass substrate, alumina, and sodium chloride crystal. X-Ray energy dispersive spectroscopy (EDS) and rutherford backscattering spectroscopy (RBS) were used to determine film composition. More detailed information about the crystallographic structure of the films was obtained with the application of Rietveld refinement method to analyse X-ray diffraction spectra. From the position and shape of the X-ray line profiles lattice parameters, domain size and micro strains were determined. Small. In amounts (< 3 at.%) cause decreasing lattice parameters, then, with further In insertion an increase of these parameters is observed. Preferential growth orientation was dependent on the In contents. The inverse pole figure (IPF), in the direction normal to the surface, was obtained semi-quantitatively; only (002) planes have a marked tendency to grow parallel to the substrate, consequently, for optimal dopant concentration the films are strongly c-axis oriented. The film microstructure was observed by electron microscopy techniques: surface morphology and microstructure were correlated with the results of the X-ray diffraction analysis. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Peru PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000165207400014 L2 - Rietveld method;structural properties;TEM;zinc oxide;ZINC-OXIDE FILMS; CHEMICAL-VAPOR-DEPOSITION; THIN-FILMS; PREFERRED ORIENTATION; PHYSICAL-PROPERTIES; ACETATE; GROWTH SO - Thin Solid Films 2000 ;376(1-2):99-109 1320 UI - 15511 AU - Milanesio M AU - Viterbo D AU - Hernandez RP AU - Rodriguez JD AU - Ramirez-Ortiz J AU - Valdes-Martinez J AD - Univ Piemonte Orinetale A Avogadro, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, ItalyUniv Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyNatl Ctr Sci Res, Xray Lab, Havana, CubaUniv Autonoma Zacatecas, Fac Ciencias Quim, Guadalupe, Zacatecas, MexicoUNAM, Inst Quim, Coyoacan 04510, DF, MexicoViterbo, D, Univ Piemonte Orinetale A Avogadro, Dipartimento Sci & Tecnol Avanzate, Corso T Borsalino 54, I-15100 Alessandria, Italy TI - Synthesis, characterization and novel crystal structure of (salicylaldehyde-4-phenylthiosemicarbazidato) ammonium dioxovanadate(V) with a V-S bond AB - (Salicylaldehyde-4-phenylthiosemicarbazidato) ammonium dioxovanadate(V), {1, NH4[VO2(PhSNO)]}, was synthesized and characterized by spectroscopic and magnetic measurements. Its crystal and molecular structure was determined by single-crystal X-ray diffraction which shows it to be the first example of a dioxovanadate(V) complex in which the vanadium is also linked to a sulfur atom. The PhSNO moiety is a bivalent, tridentate ligand. The V atom has the common square-pyramidal coordination geometry, which is compared with that found in other dioxovanadate(V) structures. The complex is linked to the NH4+ ion by a net of hydrogen bonds. (C) 2000 Elsevier Science S.A. All rights reserved MH - Cuba MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Zacatecas PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000088604400019 L2 - vanadium complexes;dioxo complexes;crystal structures;thiosemicarbazidato complexes;METHYLTHIOSEMICARBAZONATO DIOXOVANADATE(V); MONOHYDRATE; SPECTRA SO - Inorganica Chimica Acta 2000 ;306(1):125-129 1321 UI - 14988 AU - Milcic-Terzic J AU - Lopez-Vidal Y AU - Vrvic MM AU - Saval S AD - Natl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Med, Mexico City 04510, DF, MexicoUniv Belgrade, Fac Chem, YU-11001 Belgrade, YugoslaviaMilcic-Terzic, J, Natl Autonomous Univ Mexico, Inst Engn, POB 70472, Mexico City 04510, DF, Mexico TI - Biodegradation potential assessment of microbial consortia isolated from a diesel-contaminated soil AB - Diesel, toluene and naphthalene-degrading microbial consortia were isolated from a diesel-contaminated soil, The presence of catabolic genes, xylE and ndoB responsible for toluene/xylene and naphthalene biodegradation, respectively, were screened by PCR techniques in all microbial consortia. The diesel-consortium possessed both catabolic genes, the toluene-consortium only the xylE gene, while the naphthalene-consortium possessed only the ndoB gene. On the basis of these results, it was concluded that contaminated soil has indigenous microbes with a high natural potential for biodegradation MH - Mexico|Distrito Federal MH - Yugoslavia PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400056 L2 - bioremediation;catabolic genes;diesel-contaminated soil;indigenous microbial consortia;polymerase chain reaction (PCR);NUCLEOTIDE-SEQUENCE SO - Water Science and Technology 2000 ;42(5-6):403-406 1322 UI - 16676 AU - Milian-Suazo F AU - Salman MD AU - Ramirez C AU - Payeur JB AU - Rhyan JC AU - Santillan M AD - Colorado State Univ, Coll Vet Med & Biol Sci, Dept Environm Hlth, Ft Collins, CO 80523, USAUSDA, APHIS, Natl Vet Serv Labs, Ames, IA 50010, USAUAQ, Fac Ciencias Nat, Queretaro, MexicoInst Nacl Invest Forestales Agr & Pecuarias, CENID Microbiol, Palo Alto 05110, DF, MexicoSalman, MD, Colorado State Univ, Coll Vet Med & Biol Sci, Dept Environm Hlth, Ft Collins, CO 80523 USA TI - Identification of tuberculosis in cattle slaughtered in Mexico AB - Objectives-To determine epidemiologic factors associated with tuberculosis (TB) in dairy cattle slaughtered in 6 important regions for milk production in Mexico. Animals-2,500 cattle. Procedure-Tissue specimens with lesions typical of TB were obtained during routine inspection of carcasses at abbatoirs between July 1996 and January 1997. infection with Mycobacterium organisms was confirmed by histologic examination and bacteriologic culture. Species identification was made by use of selective growth medium, conventional biochemical tests, and radiometric procedures. Epidemiologic information for affected cattle was obtained by personal interviews with cattle dealers and owners. Results-400 (16%) of 2,500 cattle carcasses had gross lesions typical of TB. Of the 400 infected cattle, 336 (84%) had lesions in greater than or equal to 1 lymph node. Infection was confirmed in 87% of cattle with gross lesions by histologic examination, in 77% by bacteriologic culture at a laboratory in the United States, and in 59% by bacteriologic culture at a laboratory in Mexico. Most cattle were adult females in fair to good body condition that came from large herds (> 500 cattle) and were not included in the Mexican TB control program. Conclusions and Clinical Relevance-Mean prevalence of lesions typical of TB in dairy cattle at 6 locations in Mexico was 16%. Mycobacterium infection was confirmed by various techniques in most lesions. Recognition of typical gross lesions at slaughter may expedite TB control procedures MH - USA MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 13 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000084559400017 L2 - MYCOBACTERIUM-BOVIS INFECTION SO - American Journal of Veterinary Research 2000 ;61(1):86-89 1323 UI - 16677 AU - Milian-Suazo F AU - Salman MD AU - Black WC AU - Triantis JM AU - Ramirez C AU - Payeur JB AU - Torres MC AD - Colorado State Univ, Coll Vet Med & Biol Sci, Dept Environm Hlth, Ft Collins, CO 80523, USAColorado State Univ, Coll Vet Med & Biol Sci, Dept Microbiol, Ft Collins, CO 80523, USAUSDA, APHIS, Natl Vet Serv Labs, Ames, IA 50010, USAUniv Autonoma Queretaro, FCM, Queretaro, Qro, MexicoInst Nacl Invest Forestales Agr & Pecuarias, CENID Microbiol, Palo Alto 05110, DF, MexicoSalman, MD, Colorado State Univ, Coll Vet Med & Biol Sci, Dept Environm Hlth, Ft Collins, CO 80523 USA TI - Molecular epidemioloic analysis of Mycobacterium bovis isolates from Mexico AB - Objective-To assess phylogenetic relationships among Mycobacterium bovis isolates by use of random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) fingerprinting and to relate genetic profiles of isolates to epidemiologic characteristics. Animals-400 cattle with tuberculosis. Procedure-Mycobacterium bovis was isolated from various organs of cattle slaughtered in 6 geographic regions of Mexico. Most cattle were adult Holsteins from large herds that did not participate in a tuberculosis control program. Four random primers and 2 selected primers were used in RAPD-PCR fingerprinting of 88 isolates. Pairwise genetic distance between isolates was obtained and subjected to cluster analysis with bootstrapping to test for levels of support. Results-98 different fragments were obtained; there was broad genetic diversity among isolates, and each isolate had a unique RAPD-genotype, including those originating from the same herd. Clustering by geographic location, affected organ, or severity of lesion was not detected. linkage disequilibrium analysis suggested that M bovis was highly clonal and that mutations develop at a rapid rate among isolates. Conclusions and Clinical Relevance-Use of RAPD-PCR could not differentiate M bovis isolates by epidemiologic characteristics or identify common sources of infection MH - USA MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000084559400018 L2 - RESTRICTION-ENDONUCLEASE ANALYSIS; POLYMERASE CHAIN-REACTION; POLYMORPHIC DNA; TUBERCULOSIS COMPLEX; RANDOM AMPLIFICATION; STRAINS; MARKERS; TOOL; IDENTIFICATION; MEMBERS SO - American Journal of Veterinary Research 2000 ;61(1):90-95 1324 UI - 16510 AU - Miller B AU - Reading R AU - Hoogland J AU - Clark T AU - Ceballos G AU - List R AU - Forrest S AU - Hanebury L AU - Manzano P AU - Pacheco J AU - Uresk D AD - Denver Zool Fdn, Denver, CO 80205, USAUniv Maryland, Frostville, MD 21532, USAYale Univ, Sch Forestry & Environm, New Haven, CT 06511, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUS Fish & Wildlife Serv, Billings, MT 59101, USAUS Forest Serv, Rocky Mt Forest & Range Expt Stn, Rapid City, SD 57701, USAMiller, B, Denver Zool Fdn, 2300 Steele St, Denver, CO 80205, USA TI - The role of prairie dogs as a keystone species: Response to Stapp MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 20 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Editorial Material AV - English IS - 0888-8892 UR - ISI:000085366700037 L2 - PLANT-HERBIVORE INTERACTIONS; MIXED-GRASS PRAIRIE; CONSEQUENCES; DIVERSITY; BIOMASS; ECOLOGY SO - Conservation Biology 2000 ;14(1):318-321 1325 UI - 15686 AU - Minnich RA AU - Barbour MG AU - Burk JH AU - Sosa-Ramirez J AD - Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521, USAUniv Calif Davis, Dept Environm Hort, Davis, CA 95616, USACalif State Univ Fullerton, Dept Biol, Fullerton, CA 92634, USAUniv Autonoma Aguascalientes, Ctr Ciencias Agropecularias, Aguascalientes 20100, MexicoMinnich, RA, Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA TI - Californian mixed-conifer forests under unmanaged fire regimes in the Sierra San Pedro Martir, Baja California, Mexico AB - Aim This study appraises historical fire regimes for Californian mixed-conifer forests of the Sierra San Pedro Martir (SSPM). The SSPM represents the last remaining mixed-conifer forest along the Pacific coast still subject to uncontrolled, periodic ground fire. Location The SSPM is a north-south trending fault bound range, centred on 31 degrees N latitude, 100 km SE of Ensenada, Baja California. Methods We surveyed forests for composition, population structure, and historical dynamics both spatially and temporally over the past 65 years using repeat aerial photographs and ground sampling. Fire perimeter history was reconstructed based on time-series aerial photographs dating from 1942 to 1991 and interpretable back to 1925. A total of 256 1-ha sites randomly selected from aerial photographs were examined along a chronosequence for density and cover of canopy trees, density of snags and downed logs, and cover of non-conifer trees and shrubs. Twenty-four stands were sampled on-the-ground by a point-centred quarter method which yielded data on tree density, basal area, frequency, importance value, and shrub and herb cover. Results Forests experience moderately intense understory fires that range in size to 6400 ha, as well as numerous smaller, low intensity burns with low cumulative spatial extent. SSPM forests average 25-45% cover and 65-145 trees per ha. Sapling densities were two to three times that of overstory trees. Size-age distributions of trees greater than or equal to 4 cm dbh indicate multi-age stands with steady-state dynamics. Stands are similar to Californian mixed conifer forests prior to the imposition of fire suppression policy. Livestock grazing does not appear to be suppressing conifer regeneration. Main conclusions Our spatially-based reconstruction shows the open forest structure in SSPM to be a product of infrequent, intense surface fires with fire rotation periods of 52 years, rather than frequent, low intensity fires at intervals of 4-20 years proposed from California fire-scar dendrochronology (FSD) studies. Ground fires in SSPM were intense enough to kill pole-size trees and a significant number of overstory trees. We attribute long fire intervals to the gradual build-up of subcontinuous shrub cover, conifer recruitment and litter accumulation. Differences from photo interpretation and FSD estimates are due to assumptions made with respect to site-based (point) sampling of fire, and nonfractal fire intensities along fire size frequency distributions. Fire return intervals determined by FSD give undue importance to local burns which collectively use up little fuel, cover little area, and have little demographic impact on forests MH - Mexico|Aguascalientes MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 38 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0305-0270 UR - ISI:000088109600015 L2 - Abies concolor;aerial photo fire mapping;fire scar dendrochronology;forest stand dynamics;mixed conifer forest;Pinus jeffreyi;Pinus lambertiana;surface fire model;SOUTHERN-CALIFORNIA; WILDLAND FIRE; SUB-ALPINE; FUEL CONSUMPTION; CLIMATE-CHANGE; DYNAMICS; NEVADA; BEHAVIOR; HISTORY; PARK SO - Journal of Biogeography 2000 ;27(1):105-129 1326 UI - 16036 AU - Mirabel IF AU - Rodriguez LF AD - CEA, SAP, DAPNIA, F-91191 Gif Sur Yvette, FranceUNAM, Astron Inst, Morelia 58090, Michoacan, MexicoMirabel, IF, CEA, SAP, DAPNIA, F-91191 Gif Sur Yvette, France TI - Microquasars AB - Microquasars are stellar-mass black holes in our own Galaxy that mimic, on a smaller scale, the remarkable relativistic phenomena observed in remote quasars. Their discovery opens new perspectives for understanding the connection between the flow of matter into black holes and the genesis of relativistic jets MH - France MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000086555500017 L2 - HOLE CANDIDATE GRS-1915+105; SUPERLUMINAL SOURCE; RAY; RADIO; ACCRETION; EJECTION; JETS SO - Nuclear Physics B-Proceedings Supplements 2000 ;80():143-151 1327 UI - 16257 AU - Mirambell E AU - Zarate AV AD - Univ Politecn Catalunya, Dept Construct Engn, Barcelona, SpainInst Mexicano Transporte, Queretaro, MexicoMirambell, E, Univ Politecn Catalunya, Dept Construct Engn, Barcelona, Spain TI - Web buckling of tapered plate girders AB - When hot rolled beams (cross-section I and H) show insufficient strength or are not economic for design purposes, plate girders are usually designed, in most cases by welding several plates together. More efficient structural elements can often be achieved by designing these plate girders as tapered plate girders. This is usually done by means of a web panel (steel building frames, and steel and composite bridges), the depth of which varies linearly. One of the main distinctive features of tapered plate girders is the considerable slenderness of the web. This often results in web buckling in the elastic range prior to the yielding of the steel. This article presents an analytical formulation that makes it possible to determine the critical shear buckling stress of slender tapered web panels. This formulation, obtained on the basis of numerical studies of plate instability, takes into account the influence of all the geometric design parameters and the presence of the flanges MH - Mexico|Queretaro MH - Spain PB - LONDON: THOMAS TELFORD SERVICES LTD RP - NOT IN FILE U3 - TC 1 U4 - Construction & Building Technology;Engineering, Civil U5 - J;Article AV - English IS - 0965-0911 UR - ISI:000086185400005 L2 - critical shear buckling stress;tapered plate girders;web buckling SO - Proceedings of the Institution of Civil Engineers-Structures and Buildings 2000 ;140(1):51-60 1328 UI - 14619 AU - Miranda LD AU - Cruz-Almanza R AU - Pavon M AU - Romero Y AU - Muchowski JM AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Estado Mexico, Fac Quim, Mexico City 05000, DF, MexicoRoche Biosci, Palo Alto, CA 94304, USAMiranda, LD, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - A tandem radical addition/cyclization process of 1-(2-iodoethyl)indoles and methyl acrylate AB - Benzindolizidine systems are generated in moderate yields by a hexabutylditin mediated consecutive radical addition, cyclization, oxidation process from 1-(2-iodoethyl)indoles and methyl acrylate. (C) 2000 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000165916600006 L2 - radical cycloaddition;radical addition;hexabutylditin;indole systems;ATOM TRANSFER CYCLIZATION SO - Tetrahedron Letters 2000 ;41(52):10181-10184 1329 UI - 16028 AU - Miranda LD AU - Cruz-Almanza R AU - varez-Garcia A AU - Muchowski JM AD - Univ Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoUniv Autonoma Estado Mexico, Fac Quim, Toluca 05000, Edo De Mex, MexicoRoche Biosci, Palo Alto, CA 94304, USAMiranda, LD, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ Coyoacan, Coyoacan 04510, DF, Mexico TI - Intramolecular radical acylation of 2-methylsulfonylpyrroles AB - Primary alkyl radicals generated (AIBN/Bu3SnH) from 1-(2- or 3-haloalkyl)-2-methylsulfonylpyrroles are intercepted by CO (80 atm), and the acyl radicals so produced undergo intramolecular oxidative cyclization at the cc-position, giving bicyclic ketones with retention or loss of the sulfonyl moiety. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000086892600007 L2 - acylation;acyl radical;carbonylation;pyrroles;pyrrolizidones;indolizidinones;CYCLIZATION SO - Tetrahedron Letters 2000 ;41(17):3035-3038 1330 UI - 16494 AU - Miranda LF AU - Fernandez M AU - Alcala JM AU - Guerrero MA AU - Anglada G AU - Gomez Y AU - Torrelles JM AU - Aaquist OB AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyOsservatorio Astron Capodimonte, I-80131 Naples, ItalyUniv Illinois, Dept Astron, Urbana, IL 61801, USAUNAM, Inst Astron, Unidad Morelia, Morelia 58090, Michoacan, MexicoCSIC, IEEC, E-08034 Barcelona, SpainGrant MacEwan Community Coll, Edmonton, AB T5J 4S2, CanadaMiranda, LF, CSIC, Inst Astrofis Andalucia, Ap Correos 3004,C Sancho Panza S-N, E-18080 Granada, Spain TI - High-resolution spectroscopy and broad-band imaging of the young planetary nebula K 3-35 AB - We present high-resolution echelle and long-slit spectra and broad-band (R, I) images of the very young planetary nebula K3-35. Several emission lines are identified, including the He II 4686 line and strong [N II]6548, 6583 and [O III]4959, 5007 emissions [I([N II])/I(H alpha) similar or equal to 5.5, I([O III])/I(H beta) similar or equal to 30]. A systemic velocity V-LSR = 10 +/- 2 km s(-1) for K3-35 is obtained from the optical emission lines, Two different kinematic components are identified in the nebula. One of them is probably related to the elliptical envelope previously observed. The second component exhibits systematic changes of the radial velocity with position, and a relatively small velocity width. This component may be attributed to the precessing jet-like outflows previously identified. The R and I images and the deduced R - I colour map strongly support the existence of a dense, partially neutral disc-like region in the equatorial plane of the nebula, which probably represents an equatorial density enhancement in a previously ejected slow wind. Diagnostic diagrams for Line intensity ratios in K 3-35 and collimated components of other planetary nebulae suggest that the emission spectrum of this kind of structure is a combination of radiative and shock excitation, in agreement with recent models of shocks in a strongly photoionized medium MH - Canada MH - Germany MH - Italy MH - Mexico|Michoacan MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000085366900011 L2 - stars : mass-loss;ISM : jets and outflows;planetary nebulae : individual : K3-35;RADIO MORPHOLOGY; BIPOLAR; K-3-35; FLIERS SO - Monthly Notices of the Royal Astronomical Society 2000 ;311(4):748-754 1331 UI - 16300 AU - Miroshnichenko LI AU - De Koning CA AU - Perez-Enriquez R AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoIZMIRAN, Troitsk 142092, Moscow Region, RussiaUniv Delaware, Dept Phys & Astron, Newark, DE 19716, USAUNICIT, Juriquilla, Queretaro, MexicoMiroshnichenko, LI, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Large solar event of September 29, 1989: Ten years after AB - Out of the 56 Ground Level Enhancements (GLEs) of solar cosmic rays (SCRs) observed since 1942 until the present, 15 events were recorded in the 22nd cycle of solar activity (1986-1996). Solar proton events (SPEs) in that cycle displayed some peculiarities, which may need an interpretation on a new concept base. The event of September 29, 1989 is of special interest. Since the well-known event of February 23, 1956, it proved to be the most intense in the relativistic range of proton energies. This GLE affords a unique opportunity to study the propagation of SCRs over a wide range of rigidity. In spite of its occurrence behind the western solar limb, the originating major flare could be observed over a wide range of the wavelengths and particle energy spectra - from gamma rays to decametric radio waves, from > 2 MeV electrons to multi-GeV protons; there were also measurements of the energy spectra and charge states of solar heavy nuclei. The flare was followed by some energetic solar phenomena (large magnetic loops, coronal eruptions and mass ejections, shocks, etc.). Due to the very hard rigidity spectrum, this was the first GLE recorded by underground muon detectors. The event also has a number of other unusual features, for example, an extended component of gamma-ray emission and the change in direction of the probable particle source during the event's initial stage. In addition, the intensity-time profile of the GLE is notable for its non-classic shape, showing a two-peak structure. The latter implies the possibility of a two-component (or two-source) ejection of accelerated particles from the Sun. The available observational data for the event is described in detail, the main focus of this paper is concentrated on different attempts to interpret the data within the framework of traditional and non-traditional concepts: shock and/or post-eruption acceleration, two-component (dual) ejection, two-source model of particle acceleration in large (extended) coronal structures, etc. None of the models put forward for explaining this event is exhaustive. The rigidity spectrum of ejected protons is estimated and the problem of the maximum rigidity, R-m, of the accelerated particles is discussed. In the relativistic range, this event proved to be by 1-2 orders less intense than the event of February 23, 1956. It is also shown that the event of September 29, 1989 could not have been recorded with the present-day neutrino detectors MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Russia MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0038-6308 UR - ISI:000086026500003 L2 - COSMIC-RAY EVENT; GROUND-LEVEL ENHANCEMENT; CORONAL MASS EJECTIONS; MEAN IONIC CHARGE; PROTON EVENTS; GAMMA-RAYS; ENERGETIC PARTICLES; OZONE MINIHOLES; MAGNETIC-FIELD; FLARE MYTH SO - Space Science Reviews 2000 ;91(3-4):615-715 1332 UI - 16326 AU - Mitra R AU - Figueroa P AU - Mukhopadhyay AK AU - Shimada T AU - Takeda Y AU - Berg DE AU - Nair GB AD - Natl Inst Cholera & Enter Dis, Calcutta 700010, W Bengal, IndiaWashington Univ, Sch Med, Dept Mol Microbiol, St Louis, MO 63110, USAWashington Univ, Sch Med, Dept Mol Microbiol, St Louis, MO 63110, USAInst Politecn Nacl, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoNatl Inst Infect Dis, Shinjuku Ku, Tokyo, JapanNair, GB, Natl Inst Cholera & Enter Dis, P-33 CIT Rd,Scheme XM, Calcutta 700010, W Bengal, India TI - Cell vacuolation, a manifestation of the El Tor hemolysin of Vibrio cholerae AB - Culture supernatants of nontoxigenic nonepidemic clinical strains of Vibrio cholerae belonging to diverse serogroups Here found to induce vacuolation of nonconfluent HeLa cells, The vacuoles became prominent 18 h after introduction of culture supernatant, and vacuolated cells survived for 18 h and then died. Only a fraction of the vacuolated cells took up neutral red dye, implying that there Here differences in the vacuolar microenvironment. Further tests showed that the factor responsible for vacuolation Has heat labile and proteinaceous. Vacuolating activity Has completely neutralized by antibody to hemolysin of V. cholerae but not by antibody to vacuolating cytotoxin of Helicobacter pylori. Partial purification of the vacuolating factor led to elution of fractions, which showed both hemolytic and vacuolating activity, PCR amplification and cloning of the hemolysin structural gene (hlyA) into Escherichia coli DH5 alpha led to isolation of clones producing cell vacuolating factor in a cell-associated form. Further, a null insertion mutation in the hlyA gene of a high-vacuolating-factor-producing strain led to complete abolition of both cell vacuolating and hemolytic activities. These analyses establish vacuolation as a potentially important but previously unrecognized property of V. cholerae El Tor hemolysin MH - India MH - Japan MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 25 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000086010300025 L2 - MEMBRANE-DAMAGING CYTOTOXIN; HOSPITALIZED-PATIENTS; STRAINS; CONSTRUCTION; PURIFICATION; PROTEINS; DIARRHEA; CALCUTTA; CLONING; VECTOR SO - Infection and Immunity 2000 ;68(4):1928-1933 1333 UI - 14796 AU - Mochida GH AU - Flores-Sarnat L AU - Del Angel A AU - Gleeson JG AU - Walsh CA AD - Beth Israel Deaconess Med Ctr, Boston, MA 02215, USAUniv Washington, Childrens Hosp & Med Ctr, Seattle, WA, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Calif San Diego, San Diego, CA 92103, USA TI - Microcephaly with pachygyria: a new pedigree with autosomal recessive inheritance MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400700554 SO - American Journal of Human Genetics 2000 ;67(4):111-111 1334 UI - 14865 AU - Mohapatra RN AU - Perez-Lorenzana A AU - Pires CAD AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Inflation in models with large extra dimension driven by a bulk scaler field AB - We discuss inflation in models with large extra dimensions, driven by a bulk scalar field. The brane inflaton is then a single effective field, obtained from the bulk scalar field by scaling. The self-interaction terms of the effective brane inflaton are then naturally suppressed. The picture is consistent with a fundamental string scale in the TeV range without the problem of a superlight inflaton. If hybrid inflation is considered, the right prediction for the density perturbations as observed by the Cosmic Background Explorer san be obtained without any fine-tuning. The bulk inflaton then decays preferentially into brane Higgs fields and reheating follows MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 53 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000165341600088 L2 - LARGE INTERNAL DIMENSIONS; TEV-SCALE; QUANTUM-GRAVITY; SUBMILLIMETER DIMENSIONS; HYBRID INFLATION; COMPACTIFICATION; CONSTRAINTS; COSMOLOGY; COLLIDERS; PHENOMENOLOGY SO - Physical Review D 2000 ;6210(10): 1335 UI - 15009 AU - Mohapatra RN AU - Perez-Lorenzana A AU - Pires CAD AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Neutrino mass, bulk majoron and neutrinoless double beta decay AB - A new economical model for neutrino masses is proposed in the context of the brane-bulk scenarios for particle physics, where the global B-L symmetry of the standard model is broken spontaneously by a gauge singlet Higgs field in the bulk. This leads to a bulk singlet majoron whose Kaluza-Klein excitations may make it visible in neutrinoless double beta decay for some parameter range if the string scale is close to a TeV. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 24 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000090035400020 L2 - LARGE EXTRA DIMENSIONS; OSCILLATIONS; MILLIMETER; TEV SO - Physics Letters B 2000 ;491(1-2):143-147 1336 UI - 15817 AU - Mohapatra RN AU - Perez-Lorenzana A AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Sterile neutrino as a bulk neutrino AB - If light sterile neutrinos are needed to understand the neutrino puzzles. as is currently indicated, a major theoretical challenge is to understand why its mass is so small. It is a more serious problem than understanding the small mass of the familiar neutrinos, We discuss a new way to solve this problem by identifying the sterile neutrino as gauge neutral fermion propagating in the bulk of a higher-dimensional theory, with bulk size of order of a millimeter. The smallness of its mass is then a consequence of the size of the extra dimension and does not need the introduction of new symmetries. We present a realistic model for neutrino masses and mixings that implements this idea. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 55 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000087654300021 L2 - neutrino masses and mixings;sterile neutrino;extra dimensions;ATMOSPHERIC NEUTRINOS; MASS-SPECTRUM; DARK-MATTER; OSCILLATIONS; SOLAR; SEARCH; DIMENSIONS; KAMIOKANDE; REACTOR; GRAVITY SO - Nuclear Physics B 2000 ;576(1-3):466-478 1337 UI - 16420 AU - Mohapatra RN AU - Perez-Lorenzana A AU - Pires CAD AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Type II seesaw and a gauge model for the bimaximal mixing explanation of neutrino puzzles AB - We present an extension of the standard model where the bimaximal mixing pattern among the neutrinos naturally arises via the type II seesaw mechanism. This explains both the atmospheric and solar neutrino data via large angle vacuum oscillation among the three known neutrinos. The model does not include righthanded neutrinos but additional Higgs triplets which acquire naturally small vev's due to the type II seesaw mechanism. The presence of a global L-e - L-mu - L-tau and S-3 symmetry leads naturally to the desired mass splittings among neutrinos at the one loop level. This model predicts observable branching ratios for tau --> mu mu mu, which could be used to test the model. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 95 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000085567100017 L2 - GEV ENERGY-RANGE; KAMIOKANDE; FLUX; OSCILLATIONS; MASSES; RATIO SO - Physics Letters B 2000 ;474(3-4):355-360 1338 UI - 14578 AU - Molina R AU - Bolanos I AU - Galina CS AU - Perez E AU - Paniagua G AU - Estrada S AD - Univ Nacl Autonoma Mexico, Fac Vet Med, Mexico City 04510, DF, MexicoInst Tecnol Costa Rica, Escuela Agron, San Carlos, Costa RicaUniv Nacl Heredia, Escuela Med Vet, Heredia, Costa RicaGalina, CS, Univ Nacl Autonoma Mexico, Fac Vet Med, Mexico City 04510, DF, Mexico TI - Sexual behaviour of Zebu bulls in the humid tropics of Costa Rica: single versus multiple-sire groups AB - This study compares the courtship and mounting behaviour of Bos indicus bulls in single- and multiple-sire groups in Costa Pica (latitude 10 degrees 25'N, longitude 84 degrees 32'W, annual precipitation of 3096 mml temperature of 24 degreesC and humidity of 85.3%). Four, 3-4 year-old Brahman bulls with previous sexual experience were used to sire a group of 120 multiparous cows (average of 128 days post-partum and a body condition score of 2.5) allocated to two groups of 60 each: (1) single-sire mating group (SSM) and (2) multiple-sire mating group of three bulls (MSM). Bulls were rotated among groups every 7 days for 28 days. The frequency, type and duration of sexual activities (mounting and mounting attempts) and courtship activities (smelling and licking genital area, butting, supporting the head over a female and the sign of Flehmen) were calculated for each mating group. Descriptive and non-parametric statistics (Wilcoxon, Mann-Withney tests) were used to calculate differences between mating programmes. Sexual activities tended to be more frequent in the SSM group than the MSM group (267 versus 124, P > 0.05). Differences in the ratios of sexual to courtship activities between both groups were significant (1:3 in SSM and 1:6 in MSM, P > 0.05). Pregnancy rate averages were 28 and 37%, respectively, (P > 0.05). It is concluded that under these conditions multiple-sire mating and single-sire mating achieved similar pregnancy rates. (C) 2000 Elsevier Science B.V. All rights reserved MH - Costa Rica MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology U5 - J;Article AV - English IS - 0378-4320 UR - ISI:000166226300001 L2 - mating systems;fertility;synchronisation;CATTLE; BRAHMAN SO - Animal Reproduction Science 2000 ;64(3-4):139-148 1339 UI - 15967 AU - Molinari JL AU - Mejia H AU - White AC AU - Garrido E AU - Borgonio VM AU - Baig S AU - Tato P AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Mol Genet, Inst Cellular Physiol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Med, Infect Dis Sect, Houston, TX 77030, USAUniv Georgia, Dept Cellular Biol, Athens, GA 30603, USAMolinari, JL, Univ Nacl Autonoma Mexico, Fac Med, Dept Mol Genet, Inst Cellular Physiol, Mexico City 04510, DF, Mexico TI - Taenia solium: A cysteine protease secreted by metacestodes depletes human CD4 lymphocytes in vitro AB - Taenia solium: A cysteine protease secreted by metacestodes depletes human CD4 Lymphocytes in Vitro. Experimental Parasitology 94, 133-142. Excreted/secreted products from Taenia solium metacestodes cultured in vitro were analyzed for peptidase activity using peptide substrates Z-Phe-Arg-AFC, Arg-AFC, and Z-Gly-Gly-Arg-AFC and zymography studies. Specific inhibitor profiles revealed mainly cysteine and metalloprotease activities. Hydrolysis of substrate Z-Phe-Arg-AFC was augmented by the addition of L-cysteine and acid pH, consistent with cysteine protease activity. Cysteine protease activity was more prominent in supernatants from living metacestodes cultured in PBS than in either RPMI or RPMI plus fetal calf serum and was proportional to the number of metacestodes. Flow cytometry analysis showed depletion of human T lymphocytes cultured with living II: solium metacestodes. CD4(+) expression was significantly decreased when metacestode E/S products and L-cysteine were added to lymphocyte cultures (P = 0.027). This peptidase activity was inhibited by E-64 indicating that the depletion of CD4+ cells was due to cysteine protease activity. Thus, T. solium metacestodes produce excretory/secretory proteases. These enzymes may cleave molecules critical for the host immune response allowing the parasites to survive in the host tissues. (C) 2000 Academic Press MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 16 U4 - Parasitology U5 - J;Article AV - English IS - 0014-4894 UR - ISI:000087161700001 L2 - Taenia solium metacestode;cysteine protease;peptidase;lymphocyte;CD4(+);CD8(+);HOOKWORM ANCYLOSTOMA-CANINUM; INFLAMMATORY REACTION; PROTEOLYTIC CLEAVAGE; SCHISTOSOMA-MANSONI; PROTEINASE ACTIVITY; PARASITE PROTEASES; FASCIOLA-HEPATICA; MITE ALLERGEN; ADULT WORMS; RNA-PEPTIDE SO - Experimental Parasitology 2000 ;94(3):133-142 1340 UI - 14921 AU - Moline J AU - Carrillo LL AU - Sanchez LT AU - Godbold J AU - Todd A AD - Mt Sinai Med Ctr, Dept Community & Prevent Med, New York, NY, USANatl Polytech Inst, Ctr Res & Adv Studies, Mexico City, DF, MexicoMoline, J, Mt Sinai Sch Med, Box 1057,1 Gustave Levy Pl, New York, NY 10029 USA TI - Lactation and lead body burden turnover: A pilot study in Mexico AB - A pilot study was conducted in Morelos, Mexico in March 1999 to assess the body burden of lead in 24 Mexican women of childbearing age. Lead levels were measured in whole blood and at three bone sites: two primarily trabecular (calcaneus and patella) and one primarily cortical (tibia). Demographic and reproductive characteristics of the women and potential sources of lead exposure were gathered by a direct interview, An inverse relationship was noted between months of lactation and age-adjusted calcaneus lead level (P = 0.001). No association was observed between age-adjusted patella or tibia lean level and months of lactation (P = 0.15). Blood lead levels were positively associated with the use of lead-glazed ceramics (P = 0.01), Bone and blood lead levels were observed to be 77% higher in these rural Mexican women than in urban New York City women, This Pilot study provides further limited evidence for the hypothesis that lead mobilization occurs during lactation MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 9 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1076-2752 UR - ISI:000165223500005 L2 - X-RAY-FLUORESCENCE; BONE-MINERAL DENSITY; BLOOD LEAD; CALCIUM INTAKE; BIOCHEMICAL MARKERS; POSTPARTUM WOMEN; HUMAN TISSUES; RISK-FACTORS; PREGNANCY; MOBILIZATION SO - Journal of Occupational and Environmental Medicine 2000 ;42(11):1070-1075 1341 UI - 14691 AU - Monarrez-Espino J AU - Greiner T AD - Univ Uppsala, Dept Womens & Childrens Hlth, Sect Int Maternal & Child Hlth, S-75185 Uppsala, SwedenInst Tecnol & Estudios Super Monterrey, Chihuahua 31300, MexicoMonarrez-Espino, J, Univ Uppsala, Dept Womens & Childrens Hlth, Sect Int Maternal & Child Hlth, S-75185 Uppsala, Sweden TI - Anthropometry in Tarahumara Indian women of reproductive age in northern Mexico: Is overweight becoming a problem? AB - Recent studies point to an increasing prevalence of obesity and its consequences among American Indians. This study was conducted to assess whether overweight may constitute a problem among adolescent and adult women in one of the most isolated ethnic groups in North America. A population-based sample of 459 Tarahumara women was taken from Guachochi Municipality in northern Mexico. A BMI greater than or equal to 30 kg/m(2) was found in 16.9% of women aged 25-49 years old. A BMI-for-age greater than or equal to 85th percentile was found in 14.3% and 16.8% of women aged 12-17 and 18-24 years respectively. Very few women had a BMI < 18.5 while a normal BMI (18.5-24.9) was present in 50.3% of women living in communities with < 100 inhabitants but only 35.5% of those living in localities with greater than or equal to 100 inhabitants. Literacy and bilingualism were positively associated with overweight. Overweight does appear to be a problem of increasing public health significance, particularly where "Mestizo" influence is likely to growing. Systematic efforts to prevent obesity are needed MH - Mexico|Chihuahua MH - Sweden PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 3 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0367-0244 UR - ISI:000165888200003 L2 - anthropometry;overweight;obesity;Tarahumara;Indian;woman;Mexico;PIMA-INDIANS; NUTRITION SURVEY; NAVAJO ADOLESCENTS; BODY-WEIGHT; OBESITY; CHILDHOOD; MORTALITY; GROWTH; FOOD; EPIDEMIC SO - Ecology of Food and Nutrition 2000 ;39(6):437-457 1342 UI - 15174 AU - Mondie S AU - Zagalak P AU - Kucera V AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07300, DF, MexicoAcad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague, Czech RepublicCzech Tech Univ, Fac Elect Engn, Trnka Lab Automat Control, CR-16627 Prague, Czech RepublicMondie, S, IPN, CINVESTAV, Dept Automat Control, Av IPN 2508 Col Zacatenco,AP 14-740, Mexico City 07300, DF, Mexico TI - State feedback in linear control theory AB - The role of system invariants in solutions of classical control problems when regular state feedback is used is reviewed. The structural modifications that arise when these problems are extended to the case of non-regular state feedback are presented. An interpretation of state feedback problems in terms of matrix pencils completion is also discussed. (C) 2000 Elsevier Science Inc. All rights reserved MH - Czech Republic MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0024-3795 UR - ISI:000089460700008 L2 - state feedback;linear systems;system invariants;matrix pencil;INTERLACING INEQUALITIES; MORGAN PROBLEM; SYSTEMS; INVARIANTS; ASSIGNMENT; FORM SO - Linear Algebra and Its Applications 2000 ;317(1-3):177-192 1343 UI - 15056 AU - Mondragon-Jacobo C AU - Doudareva N AU - Bordelon BP AD - Purdue Univ, Dept Hort & Landscape Architecture, W Lafayette, IN 47906, USAMondragon-Jacobo, C, Nogal 259 Fracc Arboledas, Queretaro 76140, QRO, Mexico TI - DNA extraction from several cacti AB - A method for extraction of high quality DNA from four Opuntia sp, and other cacti using a hexadecyltrimethylammonium bromide (CTAB) method is described. These plants typically contain high levels of mucilages, complex polysaccharide compounds that bind water, thus preventing DNA extraction by common miniprep methods. The method involves adjusting the amount of tissue used according to species and age, followed by processing in an extraction buffer to separate coarse material. Extended centrifugation and digestion time in a separation buffer with CTAB (2%) was used, Exposing tissue to both buffers maintained polysaccharides in solution and allowed easier recovery of the aqueous phase that contains the DNA, We found that 5-8 g were needed to obtain up to 153 ug.g(-1) of DNA from tender tissue. Old tissue yielded 26% Less. Extraction of DNA from 5-g samples of tender tissue of the ornamental cacti Stenocereus sp., Cleistocactus sp., and Echinocereus sp. was successful. For these species, average yields ranged from 25 to 53 mug per sample. The DNA obtained was suitable for polymerase chain reaction (PCR) amplification, producing clear, distinctive, and reproducible banding patterns useful for a variety of applications MH - Mexico|Queretaro MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Horticulture U5 - J;Article AV - English IS - 0018-5345 UR - ISI:000089964200033 L2 - Opuntia ficus-indica;O. humifusa;O. albicarpa;Stenocereus sp.;Echinocereus roetteri;Nopalea cochellinifera;Cleistocactus sp.;randomly amplified polymorphic DNA;RAPD;mucilage;WATER RELATIONS; ACCLIMATION; MUCILAGE SO - Hortscience 2000 ;35(6):1124-1126 1344 UI - 14772 AU - Monreal R AU - Longoria JF AD - Univ Sonora, Dept Geol, Hermosillo, Sonora, MexicoFlorida Int Univ, Dept Geol, Miami, FL 33199, USAMonreal, R, Univ Sonora, Dept Geol, Rosales & Bld Luis Encinas, Hermosillo, Sonora, Mexico TI - Stratigraphy and structure of the Lower Cretaceous of Lampazos, Sonora, (northwest Mexico) and its relationship to the Gulf Coast succession AB - The stratigraphy and structure of the Lower Cretaceous (Aptian-Albian) rocks exposed in the area of Lampazos, Sonora, are redefined and correlated to well-known stratigraphic successions of Chihuahua and northeast Mexico (Coahuila and Nuevo Leon). Originally, seven stratigraphic units were proposed for the Cretaceous rocks exposed in the Lampazos area, but in this article only five units (El Aliso, Agua Salada, Lampazos, Espinazo del Diablo, and Los Picachos formations) have been used, and we propose herein to discontinue usage of the other two (Nogal and La Mesa formations). This Aptian-Albian succession of east-central Sonora yields facies and fossil content remarkably similar to coeval sequences in the Gulf of Mexico realm (Chihuahua, Coahuila, and Nuevo Leon). These sections contain abundant microfossils (benthic and planktonic foraminifera, colomiellids, nannoconids, and radiolarians) that permit detailed biostratigraphic determinations. A complete Aptian-lower Albian section Cease of K-6 through top of K-15 of the biochronologic scheme of Longoria, 1984) was identified. Abrupt lithic changes through the Aptian-Albian section of Lampazos revealed three major paleoceanographic events having an overall regional marine transgression, including an early Aptian (K-6 to K-7) event, a late Aptian (K-10 to K-11) event, and an early Albian (K-13 to K-14) maximum flooding phase. We used physical and biochronologic data to tie the aforementioned events to geochemically constrained Aptian-Albian oceanic anoxic events (OAEs) in Santa Rosa Canyon of Nuevo Leon. The close correlation between the oceanic events in east Sonora (northwest Mexico) and central Nuevo Leon (northeast Mexico) invokes the closer paleogeographic development of the two regions and undoubtedly links the area of Lampazos to a rapid encroachment of the paleo-Gulf of Mexico through north-central Mexico (the Mexican Sea) into northwestern Mexico (Chihuahua trough and Sonoran basin). The early Aptian (biozones K-6 to K-7) transgression has its maximum extension during the early Albian (biozones K-13 to K-14), culminating with the drowning of the carbonate platforms. The Lower Cretaceous rocks exposed in the Lampazos area are complexly folded and faulted. The more conspicuous structures are isoclinal and box-shaped folds and thrust faults, mostly oriented north-south and northwest-southeast, having vergences to both the northeast and southwest. A very conspicuous feature is the opposite vergence of thrust faults, either converging or diverging. Two dextral strike-slip faults (northeast-southwest and east-west) separate the area into three large blocks that have different patterns of folds and thrust faults. Also, it is evident that the area was affected by at least two episodes of normal faulting. Furthermore, the structural style of deformation present in the Lampazos succession is remarkably similar to the style of deformation of coeval rocks in northeastern Mexico, especially to the structure of the Chihuahua tectonic belt. The Lampazos succession is paleogeographically and tectonically related to the Chihuahua tectonic belt, and it is considered to be the westernmost extension of the ancestral Gulf of Mexico. The fact that the Lampazos succession can be lithocorrelated to known sequences in northeastern Chihuahua (Lucero, Ahumada, and Loma Plata formations) and northeast Mexico (Cupido, San Angel, La Pena, and Tamaulipas formations), which are know to be source rocks in exploration wells in Nuevo Leon and Coahuila, makes the Lampazos area of Sonora potentially attractive as an exploration target MH - Mexico|Sonora MH - USA PB - TULSA: AMER ASSOC PETROLEUM GEOLOGIST RP - NOT IN FILE U3 - TC 5 U4 - Energy & Fuels;Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-1423 UR - ISI:000165672000006 L2 - PACIFIC; RECORD; ANOXIA SO - Aapg Bulletin 2000 ;84(11):1811-1831 1345 UI - 16384 AU - Monroy-Ostria A AU - Hernandez-Montes O AU - Barker DC AD - IPN, Dept Inmunol, ENCB, Mexico City 11340, DF, MexicoDept Pathol, Molteno Labs, MRC, Outstn NIMR, Cambridge CB2 1QP, EnglandMonroy-Ostria, A, POB 63-279, Mexico City 02800, DF, Mexico TI - Aetiology of visceral leishmaniasis in Mexico AB - Two children with visceral leishmaniasis OIL), were studied by DNA analysis. DNA from liver biopsy samples from both patients, was amplified by PCR with broad primers specific for the Leishmania subgenus. DNA from the patient from Chiapas was also amplified with primers specific for the Leismania donovani complex and hybridised with a probe specific for L. donovani complex. The second patient, who is the first reported case of visceral leishmaniasis in the Mexican state of Tabasco, where localised cutaneous leishmaniasis and DCL predominate, had a co-infection with Toxoplasma gondii. The DNA from this patient was not amplified with primers specific for the L. donovani complex, did not hybridise with a probe specific for the L. donovani complex, but did hybridise with kDNA from a Mexican Leishmania mexicana strain used as a probe. We therefore, suggest that members of the L. donovani or L. mexicana complexes cause VL in Mexico. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000085907500002 L2 - visceral leishmaniasis;L-(L.) chagasi;L-(L.) mexicana;aetiology;Mexico;CUTANEOUS LEISHMANIASIS; KINETOPLAST DNA; KALA-AZAR; IDENTIFICATION; BRAZILIENSIS; HONDURAS; VARIANT; CHAGASI SO - Acta Tropica 2000 ;75(2):155-161 1346 UI - 15700 AU - Monroy A AU - Plata C AU - Hebert SC AU - Gamba G AD - Inst Nacl Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City 14000, DF, MexicoNatl Univ Mexico, Inst Invest Biomed, Mexico City 14000, DF, MexicoVanderbilt Univ, Med Ctr, Dept Med, Div Nephrol & Hypertens, Nashville, TN 37232, USAGamba, G, Inst Nacl Nutr Salvador Zubiran, Mol Physiol Unit, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Characterization of the thiazide-sensitive Na+-Cl- cotransporter: a new model for ions and diuretics interaction AB - The thiazide-sensitive Na+-Cl- cotransporter (TSC) is the major pathway for salt reabsorption in the apical membrane of the mammalian distal convoluted tubule. When expressed in Xenopus laevis oocytes, rat TSC exhibits high affinity for both cotransported ions, with the Michaelis-Menten constant (K-m) for Na+ of 7.6 +/- 1.6 mM and for Cl- of 6.3 +/- 1.1 mM, and Hill coefficients for Na+ and Cl- consistent with electroneutrality. The affinities of both Na+ and Cl- were increased by increasing concentration of the counterion. The IC50 values for thiazides were affected by both extracellular Na+ and Cl-. The higher the Na+ or Cl- concentration, the lower the inhibitory effect of thiazides. Finally, rTSC function is affected by extracellular osmolarity. We propose a transport model featuring a random order of binding in which the binding of each ion facilitates the binding of the counterion. Both ion binding sites alter thiazide-mediated inhibition of transport, indicating that the thiazide-binding site is either shared or modified by both Na+ and Cl- MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000088144600016 L2 - metolazone;distal tubule;osmolarity;salt reabsorption;CHLORIDE COTRANSPORTER; FUNCTIONAL EXPRESSION; MOLECULAR-CLONING; DISTAL TUBULE; RAT-KIDNEY; SODIUM; RECEPTORS; TRANSPORT; LOCALIZATION; METOLAZONE SO - American Journal of Physiology-Renal Physiology 2000 ;279(1):F161-F169 1347 UI - 15338 AU - Monroy R AU - Bundy A AU - Green I AD - ITESM, Dept Comp Sci, Atizapan 52926, Edo De Mexico, Mexico. Univ Edinburgh, Div Informat, Edinburgh EH1 1HN, Midlothian, Scotland TI - Searching for a solution to program verification=equation solving in CCS AB - Unique Fixpoint Induction, UFI, is a chief inference rule to prove the equivalence of recursive processes in CCS [7]. It plays a major role in the equational approach to verification. This approach is of special interest as it offers theoretical advantages in the analysis of systems that communicate values, have infinite state space or show parameterised behaviour. The use of UFI, however, has been neglected, because automating theorem proving in this context is an extremely difficult task. The key problem with guiding the use of this rule is that we need to know fully the state space of the processes under consideration. Unfortunately, this is not always possible, because these processes may contain recursive symbols, parameters, and so on. We introduce a method to automaate the use of UFI. The method uses middle-out reasoning and, so, is able to apply the rule even without elaborating the details of the application. The method introduces variables to represent those bits of the processes' state space that, at application time, were not known, hence, changing from equation verification to equation solving. Adding this method to the equation plan developed by Monroy, Bundy and Green [8], we have implemented an automated verification planner. This planner increases the number of verification problems that can be dealt with Fully automatically, thus improving upon the current degree of automation in the field MH - Mexico|Estado De Mexico MH - United Kingdom T3 - MICAI 2000: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBQ61W AV - English IS - 0302-9743 UR - ISI:000088970800001 SO - 2000 ;():1-12 1348 UI - 15717 AU - Montellano M AU - Weil A AU - Clemens WA AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Museum Paleontol, Berkeley, CA 94720, USAUniv Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720, USAWeil, A, Duke Univ, Dept Biol Anthropol & Anat, 08 Biosci Bldg,Sci Dr,Box 90383, Durham, NC 27708 USA TI - An exceptional specimen of Cimexomys judithae (Mammalia : Multituberculata) from the Campanian Two Medicine Formation of Montana, and the phylogenetic status of Cimexomys AB - We here describe a near-complete dentition, partial rostrum, and associated lumbar vertebrae of the multituberculate mammal Cimexomys judithac, discovered on a dinosaur nest horizon at Egg Mountain, in Montana's Campanian Two Medicine Formation. This specimen confirms associations of isolated teeth made by previous authors and provides a wealth of phylogenetically useful information. A phylogenetic analysis including this specimen indicates that Cimexomys is diagnosed on the basis of primitive and widely distributed character states, is probably not monophyletic, and that C. judithae is more derived than other species of Cimexomys. Species of Cimexomys are too primitive to be included in the suborders Taeniolabidoidea or Ptilodontoidea, and are thus useful as outgroups in future analyses, but they must be scored separately to insure monophyly MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: SOC VERTEBRATE PALEONTOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Paleontology U5 - J;Article AV - English IS - 0272-4634 UR - ISI:000087961200011 L2 - AGE SO - Journal of Vertebrate Paleontology 2000 ;20(2):333-340 1349 UI - 16279 AU - Montero C AU - Chi-Ahumada E AU - Chavez-Porras S AU - Gutierrez M AD - Univ Autonoma San Luis Potosi, Fac Med, Hosp Cent Dr Ignacio Morones Prieto, Dept Pathol, San Luis Potosi, MexicoUniv Cadiz, Dept Morphol Sci, Fac Med, Cadiz, SpainMontero, C, Univ Autonoma San Luis Potosi, Fac Med, Hosp Cent Dr Ignacio Morones Prieto, Dept Pathol, San Luis Potosi, Mexico TI - Application of the critical molar concentration concept to heat-mediated antigen retrieval in immunohistochemistry AB - Previously we have applied Scott's critical molar concentration concept to show that divalent cations, especially Mg2+ may be used to measure the affinity of a known monoclonal antibody for its antigen. In this paper we report the application of this same procedure to a study of a series of antigens (three globular proteins and three intermediate filaments). The concept was applied to samples without any previous treatment or after the application of heat-mediated antigen retrieval (using a pressure cooker). Our findings suggest that heat-mediated antigen retrieval sets free protein side-chain(s) that have been masked by formaldehyde fixation. This is reflected in a higher affinity of the antibody for the antigen in question MH - Mexico|San Luis Potosi MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology U5 - J;Article AV - English IS - 0018-2214 UR - ISI:000086108400007 L2 - FORMALDEHYDE FIXATION; ANTIBODIES SO - Histochemical Journal 2000 ;32(2):111-114 1350 UI - 16601 AU - Montero ME AU - Aspiazu J AU - Pajon J AU - Miranda S AU - Moreno E AD - Ctr Invest Mat Avanzadoa SC, Chihuahua 31109, Chih, MexicoInst Super Ciencias & Tecnol Nucl, La Habana 10600, CubaInst Nacl Invest Nucl, Ocoyoacac, Estado Mexico, MexicoInst Astron & Geofis, La Habana 13500, CubaMontero, ME, Ctr Invest Mat Avanzadoa SC, Miguel Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Chih, Mexico TI - PIXE study of Cuban quaternary paleoclimate geological samples and speleothems AB - PIXE elemental analysis of sediments, speleothems, and other geological formations related to the karst of the Sierra de San Carlos is presented, The similarity of the elemental composition of the sediments studied, as well as the alluvial regime which created them, indicate their common origin at each location, The Sr/Ca concentration ratio of a stalactite indicates that the average atmospheric temperature 12,000 and 18,000 years B.P, was colder than that of 6000 years B.P, (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Chihuahua MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000085079100018 L2 - CORALS SO - Applied Radiation and Isotopes 2000 ;52(2):289-297 1351 UI - 15856 AU - Monterroso VH AU - Chavez VR AU - Carbajal ET AU - Vogel DR AU - Martinez GJA AU - Garcia LH AU - Cuevas JHB AU - Teran JL AU - Hitzenberger G AU - Neves PL AU - Middlemost SJ AU - Dumortier T AU - Bunt AMG AU - Smith RD AD - Merck & Co Inc, Whitehouse Stn, NJ 08889, USAHosp FAP Comandante JB Doric, Clin Maison Sante, Lima, PeruPanamer Clin, Guayaquil, EcuadorSoc Clin Pharmacol, Vienna, AustriaSoc Clin Pharmacol, Vienna, AustriaHosp Faro, Faro, PortugalHosp Reg Espanol, Buenos Aires, DF, ArgentinaClin Renal Costa, Barranquilla, ColombiaMSD CBARDS, Brussels, BelgiumJohannesburg Gen Hosp, Parktown, South AfricaHosp Univ San Jorge, Pereira, ColombiaMorones Prieto, Monterrey, MexicoSmith, RD, Merck & Co Inc, 1 Merck Dr,POB 100,WS3C-50, Whitehouse Stn, NJ 08889 USA TI - Use of ambulatory blood pressure monitoring to compare antihypertensive efficacy and safety of two angiotensin II receptor antagonists, losartan and valsartan AB - The efficacy and safety of losartan and valsartan were evaluated in a multicenter, double-blind, randomized trial in patients with mild to moderate essential hypertension. Blood pressure responses to once-daily treatment with either losartan 50 mg (n = 93) or valsartan 80 mg (n = 94) for 6 weeks were assessed through measurements taken in the clinic and by 24-hour ambulatory blood pressure monitoring (ABPM). Both drugs significantly reduced clinic sitting systolic (SiSBP) and diastolic blood pressure (SiDBP) at 2, 4, and 6 weeks. Maximum reductions from baseline in SiSBP and SiDBP on 24-hour ABPM were also significant with the two treatments. The reduction in blood pressure was more consistent across patients in the losartan group, as indicated by a numerically smaller variability in change from baseline on all ABPM measures, which achieved significance at peak (P = .017) and during the day (P = .002). In addition, the numerically larger smoothness index with losartan suggested a more homogeneous antihypertensive effect throughout the 24-hour dosing interval. The antihypertensive response rate was 54% with losartan and 46% with valsartan. Three days after discontinuation of therapy, SiDBP remained below baseline in 73% of losartan and 63% of valsartan patients. Both agents were generally well tolerated. Losartan, but not valsartan, significantly decreased serum uric acid an average 0.4 mg/dL at week 6. In conclusion, once-daily losartan 50 mg and valsartan 80 mg had similar antihypertensive effects in patients with mild to moderate essential hypertension. Losartan produced a more consistent blood pressure-lowering response and significantly lowered uric acid, suggesting potentially meaningful differences between these two A II receptor antagonists MH - Argentina MH - Austria MH - Belgium MH - Colombia MH - Ecuador MH - Mexico|Nuevo Leon MH - USA MH - Peru MH - Portugal MH - South Africa PB - EDISON: HEALTH COMMUNICATIONS INC RP - NOT IN FILE U3 - TC 18 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0741-238X UR - ISI:000087740500007 L2 - angiotensin II antagonist;uric acid;valsartan;losartan;ambulatory blood pressure monitoring;LEFT-VENTRICULAR HYPERTROPHY; ESSENTIAL-HYPERTENSION; NORMOTENSIVE SUBJECTS; PHARMACOLOGY; POTASSIUM; REDUCTION; BLOCKADE; THERAPY; MASS; LIFE SO - Advances in Therapy 2000 ;17(2):117-131 1352 UI - 15593 AU - Montiel-Sosa JF AU - Ruiz-Pesini E AU - Montoya J AU - Roncales P AU - Lopez-Perez MJ AU - Perez-Martos A AD - Univ Zaragoza, Fac Vet, Dept Bioquim & Biol Mol & Celular, E-50013 Zaragoza, SpainUniv Zaragoza, Fac Vet, Dept Prod Anim & Ciencia Alimentos, E-50013 Zaragoza, SpainUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Dept Ciencias Biol, Mexico City 04510, DF, MexicoLopez-Perez, MJ, Univ Zaragoza, Fac Vet, Dept Bioquim & Biol Mol & Celular, Miguel Servet 177, E-50013 Zaragoza, Spain TI - Direct and highly species-specific detection of pork meat and fat in meat products by PCR amplification of mitochondrial DNA AB - Highly species-specific primers for pork D-loop mtDNA have been designed. Use of these and restrictive PCR amplification conditions has improved a reliable and rapid method for detecting a PCR-amplified 531 bp band from pork. It has been proved useful for detecting both pork meat and fat in meat mixtures, including those dry-cured and heated by cooking. Absence of response in PCR-amplified samples or mixtures from bovine, ovine, chicken, and human was also demonstrated. Furthermore, wild boar and pork samples can be also easily distinguished by a simple Avail restriction analysis MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000088319600037 L2 - mitochondrial DNA;PCR analysis;pork;meat;meat products;species identification;POLYMERASE-CHAIN-REACTION; D-LOOP REGION; CANNED TUNA; IDENTIFICATION; SEQUENCE; POLYMORPHISM; HYBRIDIZATION; GENOME; ASSAY SO - Journal of Agricultural and Food Chemistry 2000 ;48(7):2829-2832 1353 UI - 14656 AU - Montoya JA AU - Romero-Pascual E AU - Gimon C AU - Del Angel P AU - Monzon A AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Zaragoza, Fac Ciencias, Dpto Ingn Quim & TMA, E-50009 Zaragoza, SpainLPMC, URA CNRS 474, F-64000 Pau, FranceMontoya, JA, Inst Mexicano Petr, Eje Cent 152, Mexico City 07730, DF, Mexico TI - Methane reforming with CO2 over Ni/ZrO2-CeO2 catalysts prepared by sol-gel AB - Ni/ZrO2 catalysts promoted with different amounts of CeO2 (0, 1, 8 and 20 wt.%) were prepared by the sol-gel method. The catalysts were characterized after calcination at 800 degreesC and after reaction of CH4 reforming with CO2. Rietveld analysis reveals that the tetragonal ZrO2 phase (t-ZrO2) present in the catalysts is stabilized by the CeO2, forming a solid solution, and avoiding transformation to the monoclinic phase (m-ZrO2). Ni2+ also competes with Ce4+ in the incorporation to t-ZrO2. The t-ZrO2 stability increases with CeO2 concentration. The catalyst activity is increased with the CeO2 content, although some degree of deactivation, due mainly to the sintering of the support, was not completely avoided by ceria addition. The deposition of graphitic carbon does not play an important role in the catalysts deactivation. The catalytic performance is related to the Ni surface dispersion and NiO reducibility, both promoted by CeO2 incorporation. CeO2 enhances the reverse water-gas shift reaction during dry reforming of methane over the studied catalysts. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 53 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000165974200008 L2 - Ni/ZrO2-CeO2 catalyst;sol-gel;dry reforming of methane;reverse water-gas shift reaction;SUPPORTED NICKEL-CATALYSTS; CARBON-DIOXIDE; SYNTHESIS GAS; NI/AL2O3 CATALYSTS; NI CATALYSTS; CERIA; DEACTIVATION; HYDROGEN; PATHWAYS; PT/CEO2 SO - Catalysis Today 2000 ;63(1):71-85 1354 UI - 15739 AU - Montoya P AU - Liedo P AU - Benrey B AU - Cancino J AU - Barrera JF AU - Sivinski J AU - Aluja M AD - SAGAR, Programa Moscamed DGSV, Tapachula 30700, Chiapas, MexicoEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUSDA ARS, Ctr Med Agr & Vet Entomol Lab, Gainesville, FL 32604, USAInst Ecol, Xalapa 91000, Veracruz, MexicoMontoya, P, SAGAR, Programa Moscamed DGSV, Apartado Postal 368, Tapachula 30700, Chiapas, Mexico TI - Biological control of Anastrepha spp. (Diptera : Tephritidae) in mango orchards through augmentative releases of Diachasmimorpha longicaudata (Ashmead) (Hymenoptera : Braconidae) AB - Diachasmimorpha longicaudata (Ashmead) parasitoids were released by air on a weekly basis over 1600 ha of commercial mango orchards, backyard orchards, and patches of native vegetation, at a density of ca. 940 parasitoids/ha, Releases were made during 2 consecutive years, beginning at flower onset and lasting until the end of the production cycle. Two areas, 7 km apart, were compared. In one area parasitoids were released, whereas the other area was used as a control. During the 2nd year treatments were reversed. Fruit was sampled in commercial mango orchards and in backyard orchards to assess levels of parasitism in fruit fly larvae. Highly significant differences in percentage parasitism were found in release and control zones in backyard orchards. Furthermore, trapping results indicated that D. longicaudata releases were associated with ca. 2.7-fold suppression of Anastrepha spp. populations in backyard orchards. Results suggest that suppression might be affected by environmental conditions and by the parasitoid:fly ratio achieved. Anastrepha obliqua McQuart populations were suppressed more effectively by use of parasitoids than those of Anastrepha ludens Loew, perhaps due to the type of host fruits used by each species. Augmentative parasitoid releases in marginal areas surrounding commercial orchards (backyard orchards, wild vegetation) can substantially suppress fly populations, Through this approach, the number of flies that later move into commercial orchards can be significantly reduced. Such a strategy, when combined with sound orchard management schemes, can allow growers to produce clean fruit without the need to resort to the widespread use of insecticides. (C) 2000 Academic Press MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 17 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000088016300006 L2 - Diachasmimorpha longicaudata;fruit flies;Anastrepha ludens;Anastrepha obliqua;biological control;augmentative releases;mango orchards;FRUIT-FLIES DIPTERA; CERATITIS-CAPITATA; FLY DIPTERA; COSTA-RICA; PARASITOIDS; POPULATION; MEXICO; SUPPRESSION; SUSPENSA; CHIAPAS SO - Biological Control 2000 ;18(3):216-224 1355 UI - 16043 AU - Moog CH AU - Castro-Linares R AU - Velasco-Villa M AU - Marquez-Martinez LA AD - CNRS, IRCyN, UMR 6597, F-44321 Nantes 3, FranceCINVESTAV IPN, Dept Elect Engn, Mexico City 07300, DF, MexicoMoog, CH, CNRS, IRCyN, UMR 6597, F-44321 Nantes 3, France TI - The disturbance decoupling problem for time-delay nonlinear systems AB - In this paper, the disturbance decoupling problem (DDP) for a class of single-input-single-output (SISO) nonlinear systems with multiple delays in the input and the state is studied. A pioneering mathematical approach is introduced for this class of systems and is claimed to be the cornerstone of the problem. Necessary and sufficient conditions are given for the existence of a bicausal feedback that solves the DDP. Sufficient conditions for the existence of a solution within other classes of compensators are included as well MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000086890000013 L2 - disturbance decoupling;dynamic compensation;nonlinear systems;static compensation;time-delay systems;DEADTIME SO - Ieee Transactions on Automatic Control 2000 ;45(2):305-309 1356 UI - 15444 AU - Mora-Ramos ME AU - Rodriguez FJ AU - Quiroga L AD - Univ Autonoma Estado MOrelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Los Andes, Dept Fis, Bogota, ColombiaMora-Ramos, ME, Univ Autonoma Estado MOrelos, Fac Ciencias, Ave Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Polaron properties in GaN and AlN AB - The polaron binding energy and effective mass are obtained for bulk III-V nitride compounds with wurtzite crystalline structure with the use of a recently derived dielectric continuum Frohlich-like electron-phonon interaction Hamiltonian. Corrections are calculated up to second order in the coupling constants. Numerical results are reported for GaN and AIN. Effects of phonon polarization mixing are studied and its relevance to the effective mass anisotropy is discussed. For GaN, the calculated effective mass coincides with reported experimental values MH - Colombia MH - Mexico|Morelos PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800018 L2 - EFFECTIVE-MASS; WURTZITE SO - Physica Status Solidi B-Basic Research 2000 ;220(1):111-115 1357 UI - 15447 AU - Mora-Ramos ME AU - Duque CA AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Antioquia, Dept Fis, Medellin, ColombiaMora-Ramos, ME, Univ Autonoma Estado Morelos, Fac Ciencias, Ave Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Polaron free energy in GaAs quantum wells AB - The polaron free energy in a GaAs/Al/As quantum well is calculated as a function of temperature and well width. The interaction considered is that between the conduction electrons and the GaAs-like polar optical oscillations. The calculation follows a perturbative scheme in the coupling constant for the thermodynamical potential in the one-particle limit. Phonons are described with the use of a long-wavelength dispersive electroelastic continuum model MH - Colombia MH - Mexico|Morelos PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800026 SO - Physica Status Solidi B-Basic Research 2000 ;220(1):159-162 1358 UI - 13750 AU - Morales-Espejel GE AU - Venner CH AU - Greenwood JA AD - Inst Tecnol & Estudios Super Monterrey, Mexico City, DF, MexicoUniv Twente, Dept Mech Engn, Enschede, NetherlandsUniv Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandMorales-Espejel, GE, SKF Engn & Res Ctr BV, POB 2350, NL-3430 DT Nieuwegein, Netherlands TI - Kinematics of transverse real roughness in elastohydrodynamically lubricated line contacts using Fourier analysis AB - A model is presented that facilitates prediction of the transient solution for the pressure and film thickness in an elastohydrodynamically lubricated line contact for the case of arbitrary surface microgeometry (roughness) under the assumption of Newtonian lubricant behaviour and small roughness amplitude. In the model the two parts of the transient solution (particular integral and complementary function) are calculated for each Fourier component of a surface real roughness and combined to obtain the complete transient solution. As no time-consuming numerical simulations are required, the computational scheme forms a simple and efficient tool for use in a practical engineering environment. To validate the approach, first simple cases such as single dents and harmonic waviness were considered. The predictions obtained for these cases are compared with the results of full numerical simulations, showing good agreement. Subsequently the results obtained for a realistic roughness profile are presented MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands PB - BURY ST EDMUNDS: PROFESSIONAL ENGINEERING PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 1350-6501 UR - ISI:000168552800002 L2 - transient elastohydrodynamic lubrication;real roughness;surface waviness;AMPLITUDE REDUCTION; WAVINESS SO - Proceedings of the Institution of Mechanical Engineers Part J-Journal of Engineering Tribology 2000 ;214(J6):523-534 1359 UI - 15942 AU - Morales-Vela B AU - Olivera-Gomez D AU - Reynolds JE AU - Rathbun GB AD - El Colegio Frontera Sur, Chetumal 77049, Quintana Roo, MexicoCtr Invest Cientif & Estudios Super Ensenada, Ensenada 22800, Baja California, MexicoEckerd Coll, Dept Marine Sci, St Petersburg, FL, USAUS Geol Survey, Western Ecol Res Ctr, Piedras Blancas Field Stn, San Simeon, CA 93452, USACalif Acad Sci, Dept Ornithol & Mammal, San Francisco, CA 94118, USAMorales-Vela, B, El Colegio Frontera Sur, Apdo Postal 424, Chetumal 77049, Quintana Roo, Mexico TI - Distribution and habitat use by manatees (Trichechus manatus manatus) in Belize and Chetumal Bay, Mexico AB - The nearshore coastal areas of Belize and of Chetumal Bay, Mexico, support one of the largest populations of manatees (Trichechus manatus manatus) in the Caribbean. In order to further document the distribution, relative abundance, habitat associations, and status of this population, we conducted three aerial surveys. The flights were done in January 1994, May 1994, and January 1995. Total manatec counts for each survey were 266, 207, and 171, respectively. Calves represented 7.4% of the grand total. Solitary manatees represented 62.8% of the total count. Manatees were numerous around the cays east of Belize City, in Placentia and Indian Hill lagoons, and in Chetumal Bay. Most manatees were observed in lagoons and rivers. Growing tourist activities should be assessed to avoid undesirable effects on manatees. Poaching and marketing of manatee products continues to jeopardize the animals in some areas, Current research and management activities are part of a cooperative international program to conserve the manatee in the Caribbean region. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - Mexico|Quintana Roo MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000087400400007 L2 - manatee;aerial surveys;conservation;Belize;Mexico;ABUNDANCE SO - Biological Conservation 2000 ;95(1):67-75 1360 UI - 16227 AU - Morales A AU - Cespedes F AU - Alegret S AD - Univ Autonoma Barcelona, Dept Quim, Grp Sensors & Biosensors, Bellaterra 08193, Catalonia, SpainUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Secc Quim Analit, Cuautitlan Izcalli 54720, Estado Mexico, MexicoEscola Univ Politecn Medi Ambient, Mollet Del Valles 08100, Catalonia, SpainAlegret, S, Univ Autonoma Barcelona, Dept Quim, Grp Sensors & Biosensors, Bellaterra 08193, Catalonia, Spain TI - Graphite-methacrylate biocomposite material with renewable sensing surface for reagentless amperometric biosensors based on glucose dehydrogenase AB - A glucose biosensor based on a rigid conducting biocomposite has been prepared. The biocomposite is made of graphite powder and poly(methacrylate) incorporating the glucose dehydrogenase (GDH) and nicotinamide adenine dinucleotide phosphate (NADP(+)) coenzyme system. This material is prepared easily using dry-chemistry procedures allowing for the bulk immobilisation of the enzyme and the cofactor. Although the immobilisation is not very stable, the biocomposite acts as a reservoir of the biological material with a sacrificial sensing surface that may be renewed by polishing. This results in a bioelectrochemical response that is highly reproducible. The enzyme and coenzyme system is stable within the biocomposite for more than 120 days. The technique presented is a practical alternative to more conventional procedures for the fabrication of reagentless biosensors based on NAD(+)-dependent dehydrogenases, that imply the use of costly and sophisticated wet-chemistry procedures not compatible with mass-fabrication techniques. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000086301000004 L2 - graphite-methacrylate biocomposite;reagentless biosensor;glucose dehydrogenase;NAD(+);glucose;CARBON-POLYMER BIOCOMPOSITES; RIGID CARBON; ELECTRODE; COMPOSITE; SYSTEMS SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2000 ;7(2):99-104 1361 UI - 16649 AU - Morales AR AU - Galina MA AU - Jimenez S AU - Haenlein GFW AD - UNAM, Fac Estudios Super Cuautitlan, Cuautitlan 54000, MexicoUniv Colima, Posgrado Interinstituc Ciencias Pecuarias, Colima 28000, MexicoMunicipio Marques, Puma Ranch, Queretaro, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAGalina, MA, AP 22 Colima, Colima 28000, Mexico TI - Improvement of biosustainability of a goat feeding system with key supplementation AB - A one-year study was conducted to measure the effects of balanced supplementation to improve biosustainability of a 110 head goat herd in Mexico in terms of economic feasibility on limited pasturing range land complemented with an alfalfa hay forage bank and grazing corn stubble. Average weight of adult females was 52.410+/-5 kg, yearlings 40.0+/-3 kg at first kidding. Average total lactation milk production was 455+/-21 kg in 210 days. Feeding strategy included balanced concentrate (BC) from December to May, gradually changing the supplementation when grazing started, by offering a multinutritional block (MB) and complex catalytic granulate feed (CCF), which was used at the beginning of range pasture and continued, when goats were fed on corn stubble starting October. The initial BC was composed of corn, barley, wheat bran, soybean oil meal, but the latter was withdrawn from the mixture in May (3 Meal ME and 12% CP; 10% from May on), offered twice a day. Animals on pasture from May until November were supplied ad libitum with MB prepared from molasses, urea, salt, cottonseed meal, limestone, cement kin dust, corn stubble, and a mineral mixture, composed of triple superphosphate and a commercial mineral mix for ruminants and salt. Beginning in August, 200 g of CCF was added from a mixture of molasses, urea, salt, limestone, cottonseed meal, rice polishing, corn, poultry litter, commercial mineral salts, ammonium sulfate, cement kiln dust, and animal lard. Late pasture on corn stubble was from October to December. CCF was kept with the diet. Average voluntary feed intake (VFI) was 1.880 kg DM/d with an annual total of 828 kg; of which 248 kg DM was provided by alfalfa hay from a forage bank corresponding to 30% of the total feed intake; 182 kg or 22% of the diet was concentrate (BC, MB, CCF), and 398 kg or 48% was from range land (grasses, shrubs and tree leaves) or corn stubble pasturing. Balancing concentrate diminished the protein intake from 2.10 times requirements to 1.19. Changes in supplementation according to forage availability permitted nutritional optimization of the system. It was possible to improve biosustainability (forages produced on the farm) from 33% before to 48%; while increasing milk production from 400 to 455 kg/year and diminishing production cost from 20 to 17 US cents per liter of milk. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000084652500002 L2 - goats;range land;biosustainability;supplement feeding;grazing;DIGEST CELLULOSE; BACTERIA; MEXICO SO - Small Ruminant Research 2000 ;35(2):97-105 1362 UI - 16045 AU - Morales E AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Oregon, Dept Biol, Eugene, OR 97403, USAMorales, E, Univ Nacl Autonoma Mexico, Inst Ecol, Apdo Postal 70-275,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Estimating phylogenetic inertia in Tithonia (Asteraceae): A comparative approach AB - Phylogenetic inertia is a difficult issue in evolutionary biology because we have yet to reach a consensus about how to measure it. In this study a comparative approach is used to evaluate phylogenetic inertia in 14 demographic and morphological characters in 10 species and one subspecies of the genus Tithonia (Asteraceae). Three different methods, autocorrelational analysis, phylogenetic correlograms, and ancestor-state reconstruction, were used to evaluate phylogenetic inertia in these traits. Results were highly dependent on the method applied. Autoregression and phylogenetic eigenvector regression (PVR) methods found more inertia in morphological traits. In contrast, phylogenetic correlograms and ancestor-state reconstruction suggest that morphological characters exhibit-less phylogenetic inertia than demographic ones. The differences between results are discussed and methods are compared in an effort to understand phylogenetic inertia more thoroughly MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 11 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000086886500013 L2 - ancestor-state reconstruction;autoregression model;comparative method;phylogenetic inertia;Tithonia;ADAPTATION; CONSTRAINTS; STATES SO - Evolution 2000 ;54(2):475-484 1363 UI - 15315 AU - Morales EM AU - Zicovich-Wilson CM AU - Sanchez JES AU - Alvarez LJ AD - Univ Nacl Autonoma Mexico, Inst Matemat, Lab Simulac Mat, Unidad Cuernavaca, Cuernavaca 62210, Morelos, MexicoUniv Politecn Valencia, CSIC, Inst Tecnol Quim, E-46022 Valencia, SpainAlvarez, LJ, Univ Nacl Autonoma Mexico, Inst Matemat, Lab Simulac Mat, Unidad Cuernavaca, Av Univ S-N, Cuernavaca 62210, Morelos, Mexico TI - Charge distribution in NaY zeolite from charge-transfer molecular dynamics AB - Charge-transfer molecular dynamics simulations of NaY zeolite in thermodynamical equilibrium in the microcanonical ensemble were carried out in order to obtain the charge distribution of all charge-transferring species. The interaction potentials used were parameterised ab initio calculations and take into account the Al-O and Si-O partially covalent bonds, The different kinds of O and Si atoms are characterised based on their charge distributions which are comparable with experimental Si-29 MAS NMR data. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000089203300017 L2 - SOLID-STATE NMR; ACID SITES; CATALYSTS SO - Chemical Physics Letters 2000 ;327(3-4):224-229 1364 UI - 16224 AU - Morales G AU - Eyler GN AU - Cerna JR AU - Canizo AI AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Nacl, Fac Ingn, Lab Quim, Ctr Prov Buenos Aires, RA-7400 Olavarria, ArgentinaMorales, G, Ctr Invest Quim Aplicada, Blvd Enrique Hermosillo 140, Saltillo 25100, Coahuila, Mexico TI - Use of cyclic di- and triperoxides as initiators of styrene polymerization at high temperature with a view to their use in industrial applications AB - In industry, the bulk free radical polymerization of styrene takes place with the aid of peroxide initiators such as benzoyl peroxide. In this work di- and trimeric cyclic peroxides were used as initiators of the styrene polymerization in order to increase the rate of polymerization and molecular weights simultaneously MH - Argentina MH - Mexico|Coahuila PB - BASEL: MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1420-3049 UR - ISI:000086309200128 L2 - BIFUNCTIONAL INITIATORS SO - Molecules 2000 ;5(3):549-550 1365 UI - 15576 AU - Morales JL AU - Nocedal J AD - Inst Autonoma Mexico, Dept Matemat, Mexico City 01000, DF, MexicoNorthwestern Univ, ECE Dept, Evanston, IL 60208, USAMorales, JL, Northwestern Univ, ECE Dept, Evanston, IL 60208, USA TI - Automatic preconditioning by limited memory quasi-Newton updating AB - This paper proposes a preconditioner for the conjugate gradient method ( CG) that is designed for solving systems of equations Ax = b(i) with different right-hand-side vectors or for solving a sequence of slowly varying systems A(k)x = b(k). The preconditioner has the form of a limited memory quasi-Newton matrix and is generated using information from the CG iteration. The automatic preconditioner does not require explicit knowledge of the coefficient matrix A and is therefore suitable for problems where only products of A times a vector can be computed. Numerical experiments indicate that the preconditioner has most to offer when these matrix-vector products are expensive to compute and when low accuracy in the solution is required. The effectiveness of the preconditioner is tested within a Hessian-free Newton method for optimization and by solving certain linear systems arising infinite element models MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 27 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1052-6234 UR - ISI:000088375800008 L2 - preconditioning;conjugate gradient method;quasi-Newton method;Hessian-free Newton method;limited memory method;ALGORITHMS; OPTIMIZATION; STORAGE SO - Siam Journal on Optimization 2000 ;10(4):1079-1096 1366 UI - 14664 AU - Moran C AU - Azziz R AU - Carmina E AU - Dewailly D AU - Fruzzetti F AU - Ibanez L AU - Knochenhauer ES AU - Marcondes JAM AU - Mendonca BB AU - Pignatelli D AU - Pugeat M AU - Rohmer V AU - Speiser PW AU - Witchel SF AD - Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, Birmingham, AL 35249, USAUniv Alabama, Dept Med, Birmingham, AL 35249, USAInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoUniv Palermo, Palermo, ItalyCHU Lille, F-59037 Lille, FranceUniv Pisa, Pisa, ItalyUniv Barcelona, Hosp Sant Joan de Deu, Barcelona, SpainHosp Clin, Sao Paulo, BrazilFac Med Porto, Porto, PortugalHospices Civils Lyon, Lyon, FranceCHU Angers, Angers, FranceN Shore Univ Hosp, Manhasset, NY, USAChildrens Hosp Pittsburgh, Pittsburgh, PA 15213, USAAzziz, R, Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, 618 S 20th St,549 OHB, Birmingham, AL 35249 USA TI - 21-Hydroxylase-deficient nonclassic adrenal hyperplasia is a progressive disorder: A multicenter study AB - OBJECTIVE: Our aim was to determine whether the clinical features of 21-hydroxylase-deficient nonclassic adrenal hyperplasia are correlated with either age at symptom onset or age at presentation, or both, and with the degree of adrenocortical abnormality. STUDY DESIGN: In a multicenter cohort design 220 women with nonclassic adrenal hyperplasia, with a basal or adrenocorticotropic hormone-stimulated 17-hydroxyprogesterone level >30.3 nmol/L, were studied, either prospectively (n = 39) or retrospectively (n = 181). Patients were stratified by age of presentation into 5 groups: (1) <10 years (n = 25), (2) 10 to 19 years (n = 64), (3) 20 to 29 years (n = 83), (4) 30 to 39 years (n = 30), and (5) 40 to 49 years (n = 16). Two patients >50 years old were excluded from the analysis because of age. RESULTS: Ninety-two percent of patients <10 years old had premature pubarche at presentation, whereas clitoromegaly and acne were each present in only 20% of these younger subjects. With only patients 10 years old considered, presenting clinical features included hirsutism (59%), oligomenorrhea (54%), acne (33%); infertility (13%), clitoromegaly (10%), alopecia (8%), primary amenorrhea (4%), and premature pubarche (4%). Among the patients greater than or equal to 10 years old, the prevalence but not the degree of hirsutism increased significantly with age. Basal levels of 17-hydroxyprogesterone in adolescents were significantly higher than the levels found either in children (<10 years old) or women 40 to 49 years old (P <.01 and P <.03, respectively), although no difference was noted in the stimulated 17-hydroxyprogesterone levels between age groups: The adrenocorticotropic hormone-stimulated levels but not the basal levels of 17-hydroxyprogesterone were significantly higher in patients with clitoromegaly than in women without clitoromegaly. Alternatively, there were no differences in either basal or stimulated 17-hydroxyprogesterone levels between patients with and those without hirsutism, acne, or alopecia. CONCLUSION: In children 10 years old the most common presenting complaint was premature pubarche, whereas hirsutism and oligomenorrhea were more common in older patients. The prevalence of hirsutism increased with age, suggesting the progressive nature of nonclassic adrenal hyperplasia. Furthermore, the adrenocorticotropic hormone-stimulated levels of 17-hydroxyprogesterone were higher in patients with clitoromegaly, which suggests that the degree of adrenocortical dysfunction in nonclassic adrenal hyperplasia determines, at least in part, the clinical presentation MH - USA MH - Brazil MH - France MH - Italy MH - Mexico|Distrito Federal MH - Portugal MH - Spain PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 23 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000165952000034 L2 - acne;adrenal hyperplasia;clitoromegaly;21-hydroxylase;hirsutism;ACNE-VULGARIS; DEFICIENCY; WOMEN; HIRSUTISM; HYPERANDROGENISM; STIMULATION; PUBERTY SO - American Journal of Obstetrics and Gynecology 2000 ;183(6):1468-1474 1367 UI - 16191 AU - Moravec F AU - Salgado-Maldonado G AU - Jimenez-Garcia I AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Pseudocapillaria (Ichthyocapillaria) ophisterni sp n. (Nematoda : Capillariidae) from the swamp-eel Ophisternon aenigmaticum (Pisces) in Mexico AB - A new nematode species, Pseudocapillaria ophisterni sp. n., is described from the intestine and rarely from the stomach of the swamp-eel, Ophisternon aenigmaticum Rosen et Greenwood, from Catemaco Lake, Veracruz, Mexico. In having both caudal lobes in the male interconnected by a distinct dorsal membrane, it belongs to the subgenus Ichthyocapillaria. It differs from the three species in this subgenus mainly in possessing either a distinctly longer spicule or a smaller length of oesophagus relative to body length, it also differs in host type and geographical distribution. P. ophisterni is the first capillariid species reported from synbranchiform fishes MH - Czech Republic MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0044-3255 UR - ISI:000086458600005 SO - Parasitology Research 2000 ;86(4):290-293 1368 UI - 16679 AU - Moravec F AU - Salgado-Maldonado G AU - Osorio-Sarabia D AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Records of the bird capillariid nematode Ornithocapillaria appendiculata (Freitas, 1933) n. comb. from freshwater fishes in Mexico, with remarks on Capillaria patzcuarensis Osorio-Sarabia et al., 1986 AB - Re-examination of capillariid specimens collected from the freshwater fish Chirostoma estor Jordan from Lake Patzcuaro in 1985-1986 and deposited as paratypes of Capillaria patzcuarensis Osorio-Sarabia, Perez-Ponce de Leon & Salgado-Maldonado, 1986 showed that their morphology was in contradiction with the description of this species and, in fact, they could be identified as the species originally described as C. appendiculata Freitas, 1933 from cormorants Phalacrocorax brasilianus (Gm.) in Brazil; conspecific capillariid specimens were later recorded from Chirostoma estor and Cyprinus carpio L. from the same locality. This species and two others are transferred to Ornithocapillaria Barus & Sergeeva, 1990 as O. appendiculata (Freitas, 1933) n. comb., O. carbonis (Dubinin & Dubinina, 1940) n. comb., and O. phalacrocoraxi (Borgarenko, 1975) n. comb. This is the first record of O. appendiculata in Mexico. Its occurrence in fishes suggests that these nematodes may be acquired by their fish hosts accidentally while feeding on cormorant excrement containing mature nematodes. A female capillariid collected from one of 110 Chirostoma estor examined from this locality in April, 1998 was identified as Capillaria patzcuarensis. Both capillariid species are briefly described and illustrated MH - Czech Republic MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Parasitology U5 - J;Article AV - English IS - 0165-5752 UR - ISI:000084495400005 SO - Systematic Parasitology 2000 ;45(1):53-59 1369 UI - 16692 AU - Morcillo M AU - Chico B AU - Mariaca L AU - Otero E AD - CSIC, Ctr Nacl Invest Met, E-28040 Madrid, SpainInst Invest Elect, Temixco 62490, Morelos, MexicoMorcillo, M, CSIC, Ctr Nacl Invest Met, Avda Gregorio del Amo 8, E-28040 Madrid, Spain TI - Salinity in marine atmospheric corrosion: its dependence on the wind regime existing in the site AB - Salinity in marine atmospheres accelerates metallic corrosion and varies within very broad limits, ranging from extremely high values close to surf to low values near calm waters. The concentration of marine aerosol in the atmosphere depends upon several factors such as altitude, distance from the sea, land orography, land topography, direction and velocity of prevailing winds, etc. This paper has focused on the influence of winds on the salinity values recorded at a testing site located on the coast of Tarragona (Spain). The results obtained in this study suggest that there are certain marine wind directions (referred to here as "saline winds") which especially contribute to the entrainment of marine aerosol from the sea towards the land. There seems to be a critical velocity (close to 3 m s(-1)) for saline winds, above which coastal atmospheric salinity notably increases. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 26 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000084273400007 L2 - atmospheric corrosion;SEA-SALT; AEROSOLS SO - Corrosion Science 2000 ;42(1):91-104 1370 UI - 15394 AU - Moreno-Fierros L AU - Garcia N AU - Gutierrez R AU - Lopez-Revilla R AU - Vazquez-Padron RI AD - UNAM, ENEP Iztacala, Unidad Morfol & Funct, Tlalnepantla, MexicoIPN, CINVESTAV, Dept Biol Celular, Mexico City 07000, DF, MexicoCtr Genet Engn & Biotechnol, Havana 10600, CubaMoreno-Fierros, L, UNAM, ENEP Iztacala, Unidad Morfol & Funct, Ap Postal 314, Tlalnepantla, Mexico TI - Intranasal, rectal and intraperitoneal immunization with protoxin Cry1Ac from Bacillus thuringiensis induces compartmentalized serum, intestinal, vaginal and pulmonary immune responses in Balb/c mice AB - Recently we discovered that the Cry1Ac protoxin of Bacillus thuringiensis administered to Balb/c mice intraperitoneally (i.p.) or intragastrically is a systemic and intestinal immunogen as potent as cholera toxin. To further characterize the mucosal immunogenicity of Cry1Ac we additionally tried the intranasal(i.n.) and rectal routes and used enzyme-linked immunoassays to determine anti-Cry1Ac antibody responses in the serum as well as in vaginal and tracheobronchial washes and in the fluids of the large and the small intestine. Immunization by the i.p., i.n. and rectal routes induced IgM, IgG and IgA antibodies in all the mucosal surfaces analyzed, but the magnitude and predominant isotype of each response depended on the route used and the mucosal site analyzed. These data extend our findings on the striking mucosal immunogencity of Cry1Ac and provide additional evidence on the compartmentalization of the mucosal immune system. (C) 2000 Editions scientifiques et medicales Elsevier SAS MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Microbiology;Virology U5 - J;Article AV - English IS - 1286-4579 UR - ISI:000088846600004 L2 - Cry1Ac protoxin;mucosal immune compartmentalization;vaginal immunity;mucosal immunity;FEMALE GENITAL-TRACT; ANTIBODY-RESPONSES; MUCOSAL SURFACES; IMMUNOGLOBULIN-G; CHOLERA-TOXIN; INDUCTION; SYSTEM; PESTICIDES; SECRETIONS; PATTERNS SO - Microbes and Infection 2000 ;2(8):885-890 1371 UI - 16403 AU - Moreno A AU - Mas-Oliva J AU - Soriano-Garcia M AU - Salvador CO AU - Bolanos-Garcia VM AD - Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Profes Interdisciplinaria Biotecnol, IPN, Mexico City, DF, MexicoBolanos-Garcia, VM, Univ Cambridge, Dept Biochem, 80 Tennis Court Rd, Cambridge CB2 1GA, England TI - Turbidity as a useful optical parameter to predict protein crystallization by dynamic light scattering AB - The aggregation behavior of several proteins in solution including the human apolipoproteins A-II and C-III, as well as concanavalin A, thaumatin, lysozyme and mexicain, is discussed based on dynamic light scattering techniques. According to our results, the estimation of parameters such as the geometrical factor (H) and turbidity (tau) under different environmental conditions, is a useful approach in order to elucidate if protein aggregation is carried out by either nucleation or random mechanisms. We conclude that dynamic light scattering, an accurate and non-destructive technique, can be used to determine either protein precrystallization parameters or crystallization conditions when both H and tau are taken into account. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000085722800026 L2 - dynamic light scattering;protein crystallization;turbidity;geometrical factor;human apolipoproteins;SUPERSATURATED LYSOZYME SOLUTIONS; GEL ACUPUNCTURE METHOD; 3-DIMENSIONAL STRUCTURE; VAPOR-DIFFUSION; CRYSTAL-GROWTH; PRECRYSTALLIZATION; MICROBATCH; MACROMOLECULES; BINDING; RATES SO - Journal of Molecular Structure 2000 ;519():243-256 1372 UI - 16446 AU - Moreno E AU - Acevedo P AU - Castillo M AD - Univ Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 01000, DF, MexicoCITMA, ICIMAF, Ctr Ultrason, La Habana 10400, CubaAcevedo, P, Univ Nacl Autonoma Mexico, IIMAS, DISCA, Apdo Postal 20-726,Admon 20, Mexico City 01000, DF, Mexico TI - Thickness measurement in composite materials using lamb waves - Viscoelastic effects AB - Pulse propagation in plates has been investigated with the identification of Lamb modes. The application of this technique to the measurement of thickness in composite and coarse materials was previously evaluated. As a sequel, results of the application of this technique taking into account the viscoelastic properties of PVC and ferrocement are presented. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Acoustics;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0041-624X UR - ISI:000085490200010 L2 - lamb waves;pulses in plates;viscoelastic materials SO - Ultrasonics 2000 ;37(8):595-599 1373 UI - 16349 AU - Morozov DK AU - Rozhansky VA AU - Herrera JJE AU - Soboleva TK AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSt Petersburg State Tech Univ, St Petersburg 195251, RussiaMorozov, DK, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543,Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Impact of ExB drifts on impurity distribution in the scrape-off layer of a tokamak AB - As shown in recent years, a strong electrostatic field exists in the tokamak Scrape-Off-Layer (SOL) and divertor zone. In the present paper it is demonstrated that the ExB drifts resulting from it, compete with the impurity velocities caused by friction with the main ions, as well as with thermal forces. This effect can redistribute impurity flows significantly. Particularly, it may lead to impurity flow reversal. Fluid equations for the test impurities are derived using the two most representative ionization states model. As shown to first approximation, impurity motion does not depend on the ionization state. For a favorable magnetic-field direction, when the ion del B drift is directed towards the X-point, in the private region the impurities flow from the outer to the inner divertor plate. On the contrary, in the SOL the impurity flow is directed from the inner to the outer plate. Significant impurity velocity shear exists near the separatrix, and creates the effect of flow reversal. Diffusion across the flux surfaces transports impurities flowing away from the divertor plates to regions with the opposite flow direction. A reduced visual model is presented. (C) 2000 American Institute of Physics. [S1070-664X(00)01004-1] MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-664X UR - ISI:000085857500018 L2 - PLASMA SO - Physics of Plasmas 2000 ;7(4):1184-1191 1374 UI - 14424 AU - Mortimer SI AU - Montaldo HH AU - Kinghorn BP AU - Atkins KD AD - NSW Agr, Agr Res Ctr, Trangie, NSW 2823, AustraliaUniv New England, Armidale, NSW 2351, AustraliaUniv Guanajuato, Guanajuato 36500, MexicoNSW Agr, Orange Agr Inst, Orange, NSW 2800, AustraliaMortimer, SI, NSW Agr, Agr Res Ctr, Trangie, NSW 2823, Australia TI - Preliminary evidence for major genes influencing resistance to body strike and fleece rot in merino sheep MH - Australia MH - Mexico|Guanajuato PB - SUWON: ASIAN-AUSTRALASIAN ASSOC ANIMAL PRODUCTION SOCIETIES RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 1011-2367 UR - ISI:000166692000076 SO - Asian-Australasian Journal of Animal Sciences 2000 ;13():152-152 1375 UI - 14611 AU - Moser JC AU - ias-Samano JE AD - US Forest Serv, So Res Stn, USDA, Pineville, LA 71360, USAColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoMoser, JC, US Forest Serv, So Res Stn, USDA, 2500 Shreveport Hwy, Pineville, LA 71360 USA TI - Tarsonemid mite associates of Dendroctonus frontalis (Coleoptera : Scolytidae): Implications for the historical biogeography of D-frontalis AB - Seven species of mites (Acari: Tarsenomidae) were associated with two local outbreaks of the southern pine beetle, Dendroctonus frontalis Zimmerman, in Chiapas, Mexico; three of these species were new records for Mexico and Central America. The morphology and phoretic behavior of these mites differed little between the western and southern populations from the United States. One major difference was that the hyperphoretic ascospores of the southern pine beetle mycangial fungus, Ceratocystiopsis sp. (Ophiostomataceae), were common in sporothecae of Tarsonemus krantzi Smiley and Moser (Acari: Tarsonemidae) and Tarsonemus ips Lindquist in Chiapas, Mexico, whereas the ascospores of the blue stain fungus, Ophiostoma minus (Hedgcock) H. and P. Sydow (Ophiostomataceae), were rare; this situation in the southern United Stares is reversed. The paucity of behavioral and morphological differences between the two southern pine beetle populations and the relevant historical climatology suggest that the appearance of D. frontalis in the southern United States may be a recent event MH - USA MH - Mexico|Chiapas PB - OTTAWA: ENTOMOL SOC CANADA RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0008-347X UR - ISI:000166160500005 L2 - SOUTHERN PINE-BEETLE; ASCOSPORES; DISPERSAL; FUNGUS SO - Canadian Entomologist 2000 ;132(6):765-771 1376 UI - 15334 AU - Mosquera J AU - Lado C AU - Estrada-Torres A AU - Tejera EB AD - Univ Manchester, Hope Hosp, Dept Med, CSB, Salford M6 8HD, Lancs, EnglandCSIC, Real Jardin Bot, E-28014 Madrid, SpainUniv Autonoma Tlaxcala, Ctr Invest Ciencias Biol, Ixtacuixtla 90122, Tlaxcala, MexicoUniv La Laguna, Dept Biol Vegetal Bot, La Laguna 38071, SpainMosquera, J, Univ Manchester, Hope Hosp, Dept Med, CSB, Salford M6 8HD, Lancs, England TI - Trichia perichaenoides, a new myxomycete associated with decaying succulent plants AB - A new succulenticolous Trichia, T. perichaenoides, very similar in habit to Perichaena corticalis, is described from decaying Agave and Opuntia. It was recorded from a number of different sites in the Old and New World (Canary Islands, Peninsular Spain and Mexico). The most important morphological or morphotaxonomic features of the new species are the sessile, clustered sporocarps with circumscissile or reticulated dehiscence, the elateriform capillitium, with very faint sinistrorse, spiny spirals only noticeable with oil immersion or SEM, and with blunt tips, and the normally double peridium with attached outgrowths MH - United Kingdom MH - Mexico|Tlaxcala MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 3 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000088976100023 L2 - Mexico;Perichaena;Spain;succulent plants;taxonomy SO - Mycotaxon 2000 ;75():319-328 1377 UI - 15741 AU - Mould JR AU - Ridgewell A AU - Gallagher JS AU - Bessell MS AU - Keller S AU - Calzetti D AU - Clarke JT AU - Trauger JT AU - Grillmair C AU - Ballester GE AU - Burrows CJ AU - Krist J AU - Crisp D AU - Evans R AU - Griffiths R AU - Hester JJ AU - Hoessel JG AU - Holtzman JA AU - Scowen PA AU - Stapelfeldt KR AU - Sahai R AU - Watson A AU - Meadows V AD - Australian Natl Univ, Mt Stromlo Observ, Inst Adv Studies, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaUniv Wisconsin, Dept Astron, Madison, WI 53706, USASpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Michigan, Dept Atmospher & Ocean Sci, Ann Arbor, MI 48109, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USACALTECH, IPAC, Pasadena, CA 91125, USACarnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USANew Mexico State Univ, Dept Astron, Dept 4500, Las Cruces, NM 88003, USAUNAM, Inst Astron, Morelia 58090, Michoacan, MexicoMould, JR, Australian Natl Univ, Mt Stromlo Observ, Inst Adv Studies, Res Sch Astron & Astrophys, Weston Creek PO, Weston, ACT 2611, Australia TI - Jet-induced star formation in Centaurus A AB - The inner part of the northeast middle radio lobe of the radio galaxy Centaurus A is the site of complex interactions. This area contains a large H I cloud as well as filaments of ionized gas and associated blue knots, several of which exist along the northeastern edge of the radio-emitting zones. We observed the filaments and blue knots with the Hubble Space Telescope using WFPC5 and the ionized gas from the ground. Our sensitive, high angular resolution WFPC2 images reveal the presence of young stars, many concentrated in what appear to be OB associations, superimposed on a background sheet of older stars that is typical of the Cen A halo. The ages of the OB associations are estimated to be less than 15 Myr from a comparison of color-magnitude diagrams with those for the Large Magellanic Cloud star cluster NGC 2004, and younger stellar groups may be nearer regions of Ha emission. We discuss our data in the context of models for star formation stimulated by interactions between the radio jet and gas cloud MH - Australia MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087963300021 L2 - galaxies : individual (NGC 5128);galaxies : jets;galaxies : stellar content;radio continuum : galaxies;FILAMENTS; NGC-5128; CLUSTERS; WFPC2 SO - Astrophysical Journal 2000 ;536(1):266-276 1378 UI - 15049 AU - Moya-Cessa H AU - Vidiella-Barranco A AU - Roversi JA AU - Dutra SM AD - Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilINAOE, Coodinac Opt, Puebla 72000, MexicoMoya-Cessa, H, Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil TI - Unitary transformation approach for the trapped ion dynamics AB - We present a method of treating the problem of the interaction of a single trapped ion with laser beams based on successive applications of unitary transformations onto the Hamiltonian. This allows the diagonalization of the Hamiltonian, by means of recursive relations, without performing the Lamb-Dicke approximation MH - Brazil MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000089908700004 L2 - unitary transformations;trapped ions;QUANTUM; MANIPULATION; STATES; ATOM SO - Journal of Optics B-Quantum and Semiclassical Optics 2000 ;2(1):21-23 1379 UI - 15221 AU - Moya-Cessa H AU - Vidiella-Barranco A AU - Tombesi P AU - Roversi JA AD - Univ Camerino, Dipartimento Matemat & Fis, I-62032 Camerino, MC, ItalyINFM, Unit Camerino, I-62032 Camerino, MC, ItalyUniv Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilINAOE, Coordinac Opt, Puebla 72000, MexicoMoya-Cessa, H, Univ Camerino, Dipartimento Matemat & Fis, I-62032 Camerino, MC, Italy TI - Cavity field reconstruction at finite temperature AB - We present a scheme to reconstruct the quantum state of a field prepared inside a lossy cavity at finite temperature. Quantum coherences are normally destroyed by the interaction with an environment, but we show that it is possible to recover complete information about the initial state (before interaction with its environment), making possible to reconstruct any s-parametrized quasiprobability distribution, in particular, the Wigner function MH - Brazil MH - Italy MH - Mexico|Puebla PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000089402200008 L2 - QUANTUM-STATE RECONSTRUCTION; MODE SO - Journal of Modern Optics 2000 ;47(12):2127-2131 1380 UI - 15366 AU - Moya A AU - Aguirre J AU - Irikura K AD - Univ Costa Rica, Inst Invest Ingn, Lab Ingn Sism, San Jose, Costa RicaInst Ingn, Mexico City 04510, DF, MexicoKyoto Univ, DPRI, Kyoto 6110011, JapanMoya, A, Univ Costa Rica, Inst Invest Ingn, Lab Ingn Sism, San Jose, Costa Rica TI - Inversion of source parameters and site effects from strong ground motion records using genetic algorithms AB - The low-frequency flat levels and corner frequencies of the aftershocks of the Kobe earthquake, together with the site effects of the recording stations, are inverted by using genetic algorithms. All records were corrected by the quality factor, Q, of propagation-path, and for each aftershock, a different omega-squared model was assumed such that the low-frequency flat levels and corner frequencies would minimize the standard deviation of the site effects at all stations. It was observed that site effects for rock sites showed significant amplification at high frequencies. This amplification was found to correlate with spectral ratios of records located at 70-m depth and at the surface for one of the stations. After estimating the seismic moment and the stress drop, it was observed that the relation of the seismic moment, M-0, versus the corner frequency, fo, followed the scaling law M-0 alpha fo(-3). Large values of stress drop were found around asperities on the fault zone and at depth MH - Costa Rica MH - Japan MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 14 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000089060700014 L2 - JAPAN; EARTHQUAKES SO - Bulletin of the Seismological Society of America 2000 ;90(4):977-992 1381 UI - 16633 AU - Mucci A AU - Sundby B AU - Gehlen M AU - Arakaki T AU - Zhong S AU - Silverberg N AD - McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 2A7, CanadaInst Natl Rech Sci Oceanol, Rimouski, PQ G5L 3A1, CanadaUniv Laval, Dept Geol & Genie Geol, St Foy, PQ G1K 7P4, CanadaFisheries & Oceans Canada, Maurice Lamontagne Inst, Mt Joli, PQ G5H 3Z4, CanadaCtr Interdisciplinario Ciencias Marinas, La Paz, MexicoMucci, A, McGill Univ, Dept Earth & Planetary Sci, 3450 Univ, Montreal, PQ H3A 2A7, Canada TI - The fate of carbon in continental shelf sediments of eastern Canada: a case study AB - This paper discusses the effects of organic carbon oxidation on the dissolution and precipitation of calcium carbonate (aragonite and calcite) in fine-grained continental shelf and slope sediments, using data obtained during the Canadian Joint Global Ocean Flux Study program in the Gulf of St. Lawrence and on the Scotia shelf. The oxygen-penetration depth in these sediments is on the order of 10-15 mm, indicating that organic carbon is mineralized aerobically within this interval. Below this depth, organic matter degradation proceeds mostly through anoxic mineralization processes. The organic carbon content of these sediments decreases smoothly with depth. At all sites, the bottom water is supersaturated with respect to calcite. However, in most cores, immediately below the sediment-water interface, the acidity produced by the aerobic degradation of organic matter is sufficient to overcome the supersaturation of the overlying waters and induce CaCO3 dissolution. This is most strongly reflected by an increase in the porewater calcium concentration near the sediment-water interface. Deeper in the cores, the saturation state of the porewaters increases at depth as a result of alkalinity generation by sulfate reduction and CaCO3 of precipitates. Unlike organic carbon, the inorganic carbon content of the sediments therefore varies little or even increases with depth because what is lost through dissolution near the sediment-water interface is replaced at depth by precipitation. The carbon precipitated as CaCO3 in the sulfate-reduction zone originates in part from the organic carbon, resulting in the preservation of a fraction of the original organic carbon as inorganic carbon. The precipitation of CaCO3 in the anoxic zone creates an additional source of CO2 to the porewaters. The geochemical significance of this source is discussed. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 33 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000084933000014 L2 - DEEP-SEA SEDIMENTS; ANOXIC MARINE-SEDIMENTS; ORGANIC-MATTER; SULFATE REDUCTION; ST-LAWRENCE; DIFFUSION-COEFFICIENTS; MANGANESE REDUCTION; CACO3 DISSOLUTION; MARGIN SEDIMENTS; EARLY DIAGENESIS SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2000 ;47(3-4):733-760 1382 UI - 15535 AU - Mukaetova-Ladinska EB AU - Garcia-Siera F AU - Hurt J AU - Gertz HJ AU - Xuereb JH AU - Hills R AU - Brayne C AU - Huppert FA AU - Paykel ES AU - Mcgee M AU - Jakes R AU - Honer WG AU - Harrington CR AU - Wischik CM AD - Univ Cambridge, Dept Psychiat, Cambridge, EnglandUniv Cambridge, Dept Pathol, Cambridge Brain Bank Lab, Cambridge, EnglandIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City, DF, MexicoUniv Leipzig, Dept Psychiat, D-7010 Leipzig, GermanyUniv Cambridge, Inst Publ Hlth, Dept Publ Hlth, Cambridge, EnglandUniv Cambridge, Inst Publ Hlth, Dept Primary Care, Cambridge, EnglandUniv Cambridge, Inst Publ Hlth, MRC, Biostat Unit, Cambridge, EnglandMRC Ctr, Mol Biol Lab, Cambridge, EnglandUniv Aberdeen, Dept Mental Hlth, Aberdeen, ScotlandUniv British Columbia, Dept Psychiat, Vancouver, BC, CanadaMukaetova-Ladinska, EB, Addenbrookes Hosp, Dept Psychiat, Hills Rd, Cambridge CB2 2QH, England TI - Staging of cytoskeletal and beta-amyloid changes in human isocortex reveals biphasic synaptic protein response during progression of Alzheimer's disease AB - We have examined the relationships between dementia, loss of synaptic proteins, changes in the cytoskeleton, and deposition of beta-amyloid plaques in the neocortex in a clinicopathologically staged epidemiological cohort using a combination of biochemical and morphometric techniques. We report that loss of synaptic proteins is a late-stage phenomenon, occurring only at Braak stages 5 and 6, or at moderate to severe clinical grades of dementia, Loss of synaptic proteins was seen only after the emergence of the full spectrum of tau and beta-amyloid pathology in the neocortex at stage 4, but not in the presence of beta-amyloid plaques alone. Contrary to previous studies, we report increases in the levels of synaptophysin, syntaxin, and SNAP-25 at stage 3 and of alpha-synuclein and MAP2 at stage 4, Minimal and mild clinical grades of dementia were associated with either unchanged or elevated levels of synaptic proteins in the neocortex, Progressive aggregation of paired helical filament (PHF)-tau protein could be detected biochemically from stage 2 onwards, and this was earliest change relative to the normal aging background defined by Braak stage 1 that we were able to detect in the neocortex. These results are consistent with the possibility that failure of axonal transport associated with early aggregation of tau protein elicits a transient adaptive synaptic response to partial de-afferentation that may be mediated by trophic factors. This early abnormality in cytoskeletal function may contribute directly to the earliest clinically detectable stages of dementia MH - Canada MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - BALTIMORE: AMER SOC INVESTIGATIVE PATHOLOGY, INC RP - NOT IN FILE U3 - TC 40 U4 - Pathology U5 - J;Article AV - English IS - 0002-9440 UR - ISI:000088625100029 L2 - PAIRED HELICAL FILAMENTS; MICROTUBULE-ASSOCIATED PROTEIN-2; FRONTAL-LOBE DEGENERATION; TAU-PROTEIN; MONOCLONAL-ANTIBODIES; NEUROFIBRILLARY TANGLES; VASCULAR DEMENTIA; MOLECULAR LAYER; CEREBRAL-CORTEX; HUMAN BRAIN SO - American Journal of Pathology 2000 ;157(2):623-636 1383 UI - 15329 AU - Mundarain D AU - Paz JL AU - Recamier J AU - Salazar MC AU - Hernandez AJ AD - Univ Simon Bolivar, Dept Quim, Caracas 1080A, VenezuelaUniv Simon Bolivar, Dept Fis, Caracas 1080A, VenezuelaUniv Nacl Autonoma Mexico, Inst Fis, Lab Cuernavaca, Cuernavaca 62251, Morelos, MexicoPaz, JL, Univ Simon Bolivar, Dept Quim, Apartado 89000, Caracas 1080A, Venezuela TI - Transition probabilities of molecular systems in the presence of time dependent electric fields AB - Analytical expressions for the transition probabilities of a molecular system interacting with a low intensity time dependent electric field are derived in the present contribution. The molecular system is modeled as a quartic anharmonic oscillator, where the interaction with the electric field is described by the electric-dipole approximation. Using Lie algebraic techniques and typical states of quantum optics, we are able to obtain an approximate analytical expression for the temporal evolution operator in the present model system. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Morelos MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000089077600007 L2 - transition probabilities;anharmonics oscillators;Lie algebra;MORSE OSCILLATOR; ANHARMONIC-OSCILLATORS; ALGEBRAIC APPROACH; ENERGY-TRANSFER SO - Physics Letters A 2000 ;273(1-2):42-52 1384 UI - 14523 AU - Munoz-Hernandez MA AU - Wei PR AU - Liu SM AU - Atwood DA AD - Univ Kentucky, Dept Chem, Lexington, KY 40506, USAUniv Autunoma Estado Morelos, Ctr Invest Quim, Cuernavaca, Morelos 62210, MexicoAtwood, DA, Univ Kentucky, Dept Chem, Lexington, KY 40506, USA TI - Tetrametallic group 13 'Mitsubishi' molecules AB - Under fairly disparate conditions tetrametallic aluminum complexes can be isolated that feature a central six-coordinate aluminum connected by bridging heteroatoms to three peripheral four-coordinate aluminum atoms. Based upon their striking resemblance to the Mitsubishi emblem these molecules will be given the name 'Mitsubishi(TM) [1]. This review will discuss the formation of these compounds and will seek to establish the guiding principles under which additional 'Mitsubishi(TM) compounds may be formed. The impact of these compounds on the formation of solid-state materials, particularly aluminum oxide, will be briefly discussed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0010-8545 UR - ISI:000166390200001 L2 - aluminum;gallium;lanthanide;Mitsubishi;tetrametallic;M = AL; ALUMINUM ISOPROPOXIDE; STRUCTURAL CHARACTERIZATION; COORDINATION CHEMISTRY; GALLIUM; COMPLEX; DERIVATIVES; BEHAVIOR; CHALCOGENIDES; HYDROLYSIS SO - Coordination Chemistry Reviews 2000 ;210():1-10 1385 UI - 16017 AU - Munoz-Masque J AU - Sanchez-Valenzuela OA AD - CSIC, IFA, Madrid 28006, SpainCIMAT, Guanajuato 36000, Mexico TI - Natural quotients on split supercotangent bundles and their canonical supersymplectic structures AB - The Batchelor model of the supercotangent bundle of a given base supermanifold is studied. Under the assumption that the supercotangent bundle splits, two different fibrations over the given base can be globally defined. The total spaces of these fibrations are in turn quotient supermanifolds of the supercotangent bundle, and each of them is equipped with a supersymplectic structure. Their corresponding supersymplectic 2-forms are actually exact, and Z(2)-homogeneous of different degrees. The Z(2)-homogeneous 1-forms from which they come from are natural with respect to Batchelor trivializations. Each of these 1-forms can be pulled back to the supercotangent bundle via the quotient maps, and can be added together in the supercotangent bundle to produce a nonhomogeneous 1-form there. Such a 1-form in the supercotangent bundle is canonical; it is characterized by the fact that the pullback of it under any 1-form on the base supermanifold yields the same 1-form on the base. The exterior derivative of this canonical 1-form is degenerate. Its radical produces an example of an involutive subsheaf, which is not integrable. This phenomenon is explained at the light of Frobenius Theorem for supermanifolds. The radicals of its homogeneous components, on the other hand, taken separately, do produce two globally defined foliations on the supercotangent bundle, and the corresponding spaces of leaves are precisely the two quotients of the supercotangent bundle we started with MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0926-2245 UR - ISI:000087046900006 L2 - connection on a vector bundle;graded manifolds;supertangent and supercotangent bundles;supersymplectic;structures on graded manifolds;DIFFERENTIAL FORMS; SUPER-MANIFOLDS; SUPERMANIFOLDS; ALGEBRA SO - Differential Geometry and Its Applications 2000 ;12(1):85-103 1386 UI - 14366 AU - Munoz-Rodriguez D AU - Uribe-Arambula O AU - Vargas C AU - Maturino H AD - ITESM Monterrey, Ctr Elect & Telecommun, Monterrey 64849, NL, MexicoNortel Networks, Richardson, TX 75082, USAMunoz-Rodriguez, D, ITESM Monterrey, Ctr Elect & Telecommun, Monterrey 64849, NL, Mexico TI - Interference bounds in power controlled systems AB - Capacity in a code-division multiple access (CDMA) system is often referred to in terms of the maximum number of users that can be supported within a carrier to interference ratio above a specified quality threshold. This paper presents a simple analysis showing that the total mean interference in the reverse channel, in a multi-tier scenario of a CDMA system with power control, is finite regardless of the number of surrounding tiers. Riemann-Hurwitz analysis is introduced in order to obtain upper and lower interference bounds MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Telecommunications U5 - J;Article AV - English IS - 1089-7798 UR - ISI:000166790100006 SO - Ieee Communications Letters 2000 ;4(12):398-401 1387 UI - 16126 AU - Munoz EC AU - Rosado JL AU - Lopez P AU - Allen LH AD - Natl Inst Nutr, Mexico City, DF, MexicoUniv Calif Davis, Davis, CA 95616, USA TI - The existence of multiple micronutrient deficiencies in rural Mexican children and its association with growth MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918103098 SO - Faseb Journal 2000 ;14(4):A535-A535 1388 UI - 16483 AU - Munoz EC AU - Rosado JL AU - Lopez P AU - Furr HC AU - Allen LH AD - Natl Inst Nutr, Dept Nutr Physiol, Mexico City 14000, DF, MexicoUniv Calif Davis, Program Int Nutr, Davis, CA 95616, USAUniv Connecticut, Dept Nutr Sci, Storrs, CT, USARosado, JL, Natl Inst Nutr, Dept Nutr Physiol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Iron and zinc supplementation improves indicators of vitamin A status of Mexican preschoolers AB - Background: The coexistence of multiple micronutrient deficiencies is a widespread public health problem in many regions of the world. Interactions between zinc deficiency and vitamin A metabolism have been reported but no longitudinal studies have evaluated the effect of iron deficiency on vitamin A. Objective: The objective of this study was to investigate the effect of supplementation with iron, zinc, or both on vitamin A and its metabolically related proteins retinol binding protein (RBP) and transthyretin. Design: The study was a longitudinal, double-blind, placebo-controlled trial in which 219 rural Mexican children aged 18-36 mo were randomly assigned to receive 20 mg Zn/d, 20 me Fe/d, 20 mg Zn/d plus 20 mg Fe/d. or placebo. Results: Six months after supplementation. plasma retinol increased in all supplemented groups. Compared with placebo, zinc supplementation was associated with significantly higher plasma retinol and transthyretin but the increase in REP was not significant. Iron supplementation significantly increased plasma retinol, REP, and transthyretin. Supplementation with zinc plus iron significantly increased plasma retinol but not REP or transthyretin. Children deficient in zinc, iron, or vitamin A (as indicated by nutrient plasma concentration) at the beginning of the study had a significantly greater increase in retinol than did children with adequate nutrient status. Conclusions: Supplementation with zinc, iron, or both improved indicators of vitamin A status. The results of this study agree with previous observations of a metabolic interaction between zinc and vitamin A and suggest an interaction between iron and vitamin A metabolism MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 33 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000085499600023 L2 - zinc deficiency;iron deficiency;vitamin A deficiency;retinol binding protein;REP;transthyretin;nutrient interactions;preschoolers;RETINOL-BINDING PROTEIN; OF-THE-ART; A-DEFICIENCY; PREDICTED PREVALENCE; VILLAGE POPULATIONS; MINERALS DEFICIENCY; NORTHEAST THAILAND; PLASMA-LEVELS; METABOLISM; CHILDREN SO - American Journal of Clinical Nutrition 2000 ;71(3):789-794 1389 UI - 14539 AU - Munoz M AU - Pollak FH AU - Zakia MB AU - Patel NB AU - Herrera-Perez JL AD - CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210, USACUNY Brooklyn Coll, New York Ctr Adv Technol Ultrafast Photon Mat & A, Brooklyn, NY 11210, USAUniv Estadual Campinas, LPD, DFA Inst Fis, BR-13081970 Campinas, SP, BrazilUniv Estadual Campinas, Ctr Componentes Semicond, BR-13081970 Campinas, SP, BrazilIPN, CICATA, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoNYU, Grad Sch, New York, NY 10016, USANYU, Univ Ctr, New York, NY 10016, USAMunoz, M, CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210, USA TI - Temperature dependence of the energy and broadening parameter of the fundamental band gap of GaSb and Ga1-xInxAsySb1-y/GaSb (0.07 <= x <= 0.22, 0.05 <= y <= 0.19) quaternary alloys using infrared photoreflectance AB - We have measured the temperature dependence of the energy [E-0(T)] and broadening parameter [Gamma (0)(T)] of the fundamental gap for GaSb and four samples of Ga1-xInxAsySb1-y (lattice matched to GaSb) using infrared photoreflectance. The parameters that describe the temperature variation of the energy (including thermal-expansion effects) were evaluated using both the semiempirical Vashni relation as well as an equation that incorporates the Bose-Einstein occupation factor. The behavior of Gamma (0)(T) was described by a Bose-Einstein-type equation MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000166307800068 L2 - VAPOR-PHASE EPITAXY; WELL DIODE-LASERS; MU-M; SPECTRAL ELLIPSOMETRY; INJECTION-LASERS; CRITICAL-POINTS; 100 GASB; GAINASSB/ALGAASSB; GROWTH; SI SO - Physical Review B 2000 ;62(24):16600-16604 1390 UI - 16596 AU - Munoz M AU - Wei K AU - Pollak FH AU - Freeouf JL AU - Wang CA AU - Charache GW AD - CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210, USACUNY Brooklyn Coll, New York State Ctr Adv Technol Ultrafast Photon M, Brooklyn, NY 11210, USAInterface Studies Inc, Katonah, NY 10536, USAMIT, Lincoln Lab, Lexington, MA 02420, USALockheed Martin Corp, Schenectady, NY 12301, USAIPN, CINVESTAV, Dept Fis, Mexico City 07738, DF, MexicoCUNY Grad Sch & Univ Ctr, New York, NY 10036, USAMunoz, M, CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210, USA TI - Optical constants of Ga1-xInxAsySb1-y lattice matched to GaSb (001): Experiment and modeling AB - The optical constants epsilon(E)[= epsilon(1)(E) + i epsilon(2)(E)] of two epitaxial layers of GaInAsSb/GaSb have been measured at 300 K using spectral ellipsometry in the range of 0.35-5.3 eV. The epsilon(E) spectra displayed distinct structures associated with critical points (CPs) at E-0 (direct gap), spin-orbit split E-0 + Delta(0) component, spin-orbit split (E-1,E-1 + Delta(1)) and (E-0',E-0' + Delta(0)') doublets, as well as E-2. The experimental data over the entire measured spectral range (after oxide removal) has been fit using the Holden model dielectric function [Holden , Phys. Rev. B 56, 4037 (1997)] based on the electronic energy-band structure near these CPs plus excitonic and band-to-band Coulomb-enhancement effects at E-0, E-0 + Delta(0), and the E-1, E-1 + Delta(1) doublet. In addition to evaluating the energies of these various band-to-band CPs, information about the binding energy (R-1) of the two-dimensional exciton related to the E-1, E-1 + Delta(1) CPs was obtained. The value of R-1 was in good agreement with effective mass/k.p theory. The ability to evaluate R-1 has important ramifications for recent first-principles band-structure calculations which include exciton effects at E-0, E-1, and E-2 [M. Rohlfing and S. G. Louie, Phys. Rev. Lett. 81, 2312 (1998); S. Albrecht , Phys. Rev. Lett. 80, 4510 (1998)]. The experimental absorption coefficients in the region of E-0 were in good agreement with values obtained from a linear interpolation of the end-point materials. Our experimental results were compared to a recent evaluation and fitting (Holden model) of the optical constants of GaSb. (C) 2000 American Institute of Physics. [S0021-8979(00)04004-4] MH - Mexico|Distrito Federal MH - USA PB - WOODBURY: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 25 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000084992500029 L2 - CRITICAL-POINT PARAMETERS; VAPOR-PHASE EPITAXY; WELL DIODE-LASERS; MU-M; TEMPERATURE-DEPENDENCE; DIELECTRIC FUNCTION; REFRACTIVE-INDEXES; INJECTION-LASERS; GAINASSB/ALGAASSB; GAAS SO - Journal of Applied Physics 2000 ;87(4):1780-1787 1391 UI - 14822 AU - Murakowski J AU - Cywiak M AU - Rosner B AU - van der Weide D AD - Univ Delaware, Newark, DE 19716, USACtr Invest Opt AC, Leon, Gto, MexicoUniv Wisconsin, Madison, WI, USAMurakowski, J, Univ Delaware, Newark, DE 19716, USA TI - Far field optical imaging with subwavelength resolution AB - We describe a far field optical imaging technique for surface topography measurement with subwavelength lateral resolution. In this system, the surface under test is vibrated in a plane parallel to the plane of the surface and perpendicular to the incident probe beam. The phase of the reflected beam, modulated by surface irregularities, is detected by cutting half of the overall beam with a knife-edge and by using a lock-in amplifier whereby noise floor is lowered and transfer function profile is extended to higher spatial frequencies. We present experimental results showing subwavelength lateral resolution. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000165417300009 L2 - surface topography;knife-edge detector;reference-beam detection;SURFACE SO - Optics Communications 2000 ;185(4-6):295-303 1392 UI - 14301 AU - Murillo-Amador B AU - Troyo-Dieguez E AU - Jones HG AU - yala-Chairez F AU - Tinoco-Ojanguren CL AU - Lopez-Cortes A AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja Calif Sur, MexicoUniv Dundee, Dundee DD1 4HN, ScotlandUniv Autonoma Sonora, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Hermosillo, Sonora, MexicoMurillo-Amador, B, Ctr Invest Biol Noroeste, SC Apdo Postal 128, La Paz 23000, Baja Calif Sur, Mexico TI - Screening and classification of cowpea genotypes for salt tolerance during germination AB - Twenty-five cowpea genotypes were tested to determine salt tolerance during germination to three salinity levels (0, 85, and 170 mM NaCl). Germination percentage decreased as salinity increased. Salt concentration affects cowpea genotypes seeds by delaying start of germination. Salinity lowered both germination rate and germination percentage. Two criteria were used to classify genotypes as tolerant: 1) genotypes with more than 75% germination compared with the control at 170 mM NaCl and genotypes with more than 90% germination compared with the control at 85 mM NaCl, and 2) genotypes with more than 40% germination compared with the control at 170 mM NaCl and more than 75% compared with the control at 85 mM NaCl. Tolerant genotypes were UCR 109 CB3, H-8-27, UCR 158 CB88, UCR 188 CB5, and CB 46 from University of California Riverside and Paceno from Mexico. The criterion for sensitivity was less than 30% germination with respect to the control at 170 mM NaCl and less than 15% germination with respect to the control at 170 mM NaCl. Sensitive genotypes were IT96D-733, IT89KD-391, IT95K-1088-4, IT95K-1090-12, and IT90K-277-2 from IITA, Nigeria, and Sonorense from Mexico. UCR 109 CB3 was the most salt tolerant genotype, while H8-8-27 UCR 158 CB88, Paceno, UCR 118 CB5, CB 46 and IT89KD-288 were intermediate in salt tolerance. The rest were considered salt-sensitive genotypes MH - Mexico|Baja California Sur MH - Mexico|Sonora MH - United Kingdom PB - VICENTE LOPEZ (BA): FUNDACION ROMULO RAGGIO RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9457 UR - ISI:000166805500011 L2 - Vigna unguiculata;salinity;genetic variation;germination percentage;germination rate;GROWTH; SALINITY; PLANTS; YIELD SO - Phyton-International Journal of Experimental Botany 2000 ;67():71-84 1393 UI - 14302 AU - Murillo-Amador B AU - Troyo-Dieguez E AU - Lopez-Cortes A AU - Tinoco-Ojanguren CL AU - Jones HG AU - yala-Chairez F AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja Calif Sur, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Hermosillo, Sonora, MexicoUniv Dundee, Dundee DD1 4HN, ScotlandUniv Autonoma Sonora, Sonora, MexicoMurillo-Amador, B, Ctr Invest Biol Noroeste, SC Apdo Postal 128, La Paz 23000, Baja Calif Sur, Mexico TI - Path analysis of cowpea early seedling growth under saline conditions AB - Our objective was to study the effects of salt on growth parameters of cowpea using path-coefficient analysis which describes a priori cause-and-effect relathionships. We used three salt levels with electrical conductivities of the irrigation treatments of 0, 7.8 and 15.6 dS/m. Net assimilation rate (NAR), crop growth rate (CGR), leaf area ratio (LAR), and relative growth rate (RGR) were measured according to Radford & Hunt. The results show that as salt levels increased, all growth parameters decreased quadratically by a reduction of the main components of growth: dry-matter and leaf area. Path-coefficient analysis revealed that NAR and LAR had positive direct effects on RGR at the 7.8 and 15.6 dS/m salt levels. These growth parameters are important in selecting for higher relative early growth rate of cowpea seedlings under saline conditions MH - Mexico|Baja California Sur MH - Mexico|Sonora MH - United Kingdom PB - VICENTE LOPEZ (BA): FUNDACION ROMULO RAGGIO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9457 UR - ISI:000166805500012 L2 - Vigna unguiculata;salt tolerance;physiological traits;YIELD; CONDUCTANCE; WATER SO - Phyton-International Journal of Experimental Botany 2000 ;67():85-92 1394 UI - 15123 AU - Murphy JB AU - Keppie JD AD - St Francis Xavier Univ, Dept Geol, Antigonish, NS B2G 2W5, CanadaUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoMurphy, JB, St Francis Xavier Univ, Dept Geol, Antigonish, NS B2G 2W5, Canada TI - Uniformitarianism revisited: a comparison between modern and ancient orogens (IGCP Project 453) MH - Canada MH - Mexico|Distrito Federal PB - OSAKA: INT ASSOC GONDWANA RESEARCH RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1342-937X UR - ISI:000089631000010 SO - Gondwana Research 2000 ;3(4):554-555 1395 UI - 16070 AU - Nagai Y AU - Gonzalez H AU - Shrier A AU - Glass L AD - Ctr Nonlinear Dynam Physiol & Med, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaUNAM, Fac Ciencias, Lab Biofis, Mexico City, DF, MexicoNagai, Y, Ctr Nonlinear Dynam Physiol & Med, 3655 Drummond St, Montreal, PQ H3G 1Y6, Canada TI - Paroxysmal starting and stopping of circulating waves in excitable media AB - Levels of intracellular Ca2+ were monitored using fluorescence from Ca2+-sensitive dyes in chick embryonic heart cells cultured in an annular geometry. There was spontaneous starting and stopping of reentrant waves of activity. The results are modeled using modified FitzHugh-Nagumo equations representing pacemakers embedded in a conducting medium. These results provide a potential mechanism for spontaneous abnormal cardiac rhythms in which there are rapid heart beats (tachycardias) that repetitively start and stop MH - Canada MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000086797300058 L2 - CHEMICAL PINWHEEL; CONDUCTION; RINGS; TACHYCARDIAS; OSCILLATORS; EXCITATION SO - Physical Review Letters 2000 ;84(18):4248-4251 1396 UI - 15017 AU - Nakamura T AU - Kaiya K AU - Takahashi N AU - Matsuzawa T AU - Rowlands CC AU - Beltran-Lopez V AU - Smith GM AU - Riedi PC AD - Shizuoka Univ, Fac Engn, Dept Mat Sci & Technol, Hamamatsu, Shizuoka 432, JapanShizuoka Univ, Grad Sch Sci & Technol, Hamamatsu, Shizuoka 4328561, JapanNemoto & Co Ltd, R&D Ctr, Tokyo 168, JapanUniv Wales Coll Cardiff, Natl EPSRC ENDOR Ctr, Cardiff CF1 3TB, S Glam, WalesUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandNakamura, T, Shizuoka Univ, Fac Engn, Dept Mat Sci & Technol, Hamamatsu, Shizuoka 432, Japan TI - High frequency EPR of europium(II)-doped strontium aluminate phosphors AB - The europium(II) sites in Sr4Al14O25:Eu phosphor with blue emission were examined by means of high frequency (90 and 180 GHz) EPR spectroscopy. The ions occupy two low symmetry sites in the Sr4Al14O25 lattice with \D\ = 0.100 and 0.0907 cm(-1) respectively; the ratio \E/D\ is estimated to be 1/3 regardless of the substitution site. This implies that the crystal field surrounding europium(II) ions has non-axial symmetry. EPR spectral simulation suggests that the europium(II) ions preferentially occupy the site with the larger \D\ when they substitute for strontium ions. Comparison of the EPR spectra of Sr4Al14O25:Eu and SrAl2O4:Eu,Dy phosphors shows that the Sr4Al14O25:Eu is present as an impurity in the non-stoichiometric SrAl2O4:Eu,Dy when prepared with excess amounts of Al2O3. Such materials have been found to have long phosphorescent characteristics MH - Japan MH - Mexico|Distrito Federal MH - United Kingdom PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000090052000025 L2 - Europium doping;Strontium aluminate;Phosphor SO - Journal of Materials Chemistry 2000 ;10(11):2566-2569 1397 UI - 14839 AU - Naranjo-Modad S AU - Lopez-Munguia A AU - Vilarem G AU - Gaset A AU - Barzana E AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoUNAM, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoEcole Natl Super Chim, Inst Natl Polytech Toulouse, Lab Chim Agro Ind, F-31077 Toulouse, FranceBarzana, E, Univ Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Solubility of purified lutein diesters obtained from Tagetes erecta in supercritical CO2 and the effect of solvent modifiers AB - Purified lutein diesters deposited on commercial nonporous glass beads were solubilized in supercritical CO2 in a computerized batch extractor, and their solubilities were compared to their solubilities in hexane. Densities of 0.7, 0.8, and 0.9 g/mL were evaluated without modifiers. Both pressure and temperature increased solubility, although temperatures >50 degreesC promoted carotenoid loss as determined by mass balance. Solubility was enhanced by the use of modifiers and was related to their log P. Chloroform (log P = 2) increased 2.8 times the amount of solubilized lutein diesters compared to pure CO2 at the same extraction conditions (0.9= g/mL and 40 degreesC) to yield 65% of the amount extracted with hexane. Supercritical CO2 extraction of lutein diesters could represent a cleaner technology as compared to the current industrial use of hexane with important; ecological and health-related implications MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000165490000089 L2 - supercritical CO2;carotenoids;lutein;Tagetes erecta;modifiers;log P;BETA-CAROTENE; EXTRACTION SO - Journal of Agricultural and Food Chemistry 2000 ;48(11):5640-5642 1398 UI - 14268 AU - Narro LA AU - Perez JC AU - Pandey S AU - Crossa J AU - Salazar F AU - Arias MP AU - Franco J AD - CIMMYT, Mexico City 06600, DF, MexicoCIMMYT, CIAT, Cali, ColombiaUniv Republ, Fac Agron, Montevideo 12900, UruguayPandey, S, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Diallel and triallel analysis in an acid soil tolerant maize (Zea mays L.) population AB - The diallel analysis has been used mainly to estimate general-(GCA) and specific combining ability (SCA) effects for a fixed sample of parents and less frequently to estimate components of variance for a random sample of parents of the reference population. In both cases, only additive and deviations due to dominance effects can be estimated, assuming thar epistasis is negligible. The triallel analysis allows the estimation of epistasis variance because more ancestors are available and more covariances among relatives can be estimated. The maize (Zea mays L.) population SA-8 was used to estimate components of variance through the generation of single- and three-way crosses with a random sample of 50 S1 lines. Replicated trials were planted in ten environments, including seven acidic and three non-acidic soils. Each trial consisted of 400 entries, 100 single- and 300 three-way crosses. Yields on non-acidic soils averaged 70% greater than on acidic soils. Within a given soil type (non-acidic or acidic), single crosses were similar to three-way crosses in overall mean, maximum, and minimum values for grain yield, clays to 50% silk emergence, and plant height. For these traits, GCA and SCA sum of squares were highly significant using the triallel and diallel analyses For acidic soils, and across environments; although an overestimation for GCA effects for the diallel analysis was observed. Estimation of components of variance using the triallel and diallel data for the full model showed that sigma (2)(AD), and sigma (2)(AA) explained 79 and 19% of the genetic variance respectively, and both were highly significant; sigma (2)(A) explained less than 2% of the generic variance. On the other hand, using the reduced model, sigma (2)(A) and sigma (2)(D) were significant and explained 37 and 63% of the genetic variation, respectively. The results, using the diallel data only, are in agreement with the reduced model. These results suggest that epistasis was important in the SA-8 maize population. The similar grain yields for single- and three-way crosses in the present study suggest that both types of hybrids would be suitable to increase maize yields in acidic and non-acidic environments of the developing countries MH - Colombia MH - Mexico|Distrito Federal MH - Uruguay PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000167030600005 L2 - TROPICAL MAIZE; GENERATION SO - Maydica 2000 ;45(4):301-308 1399 UI - 15597 AU - Nava-Salgado VO AU - Adam W AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Wurzburg, Inst Organ Chem, D-97074 Wurzburg, GermanyNava-Salgado, VO, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - The unexpected reorganizations of a beta-lactone aldolate to 1,3-dioxan-4-ones in the reaction of 4-(1-methylethyl)-3-[(phenylthio)methyl]-1-oxetan-2-one lithium enolate with acetaldehyde AB - The Lithium enolate 4-(1-methylethyl)-3-[(phenylthio)methyl]-1-oxetan-2-one (1), generated from the conjugate addition of lithium thiophenolate to ct-methylene-beta-lactone 2, reacts with acetaldehyde to give the 1,3-dioxan-4-ones 3 and 4 as unexpected aldol products. These products result from unusual aldol reorganization processes, which entail a complex cascade of aldol additions, retroaldol cleavages and translactonizations, The configurations of the products have been determined by NOE experiments MH - Germany MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000088368800002 L2 - beta-lactone aldolate;aldol reactions;lactones;lithium enolates;aldehydes;STEREOSELECTIVE SYNTHESIS; ALLENE EQUIVALENTS; ALPHA-AMINO; DECARBOXYLATION; ACID; CYCLOADDITION; RESOLUTION; ADDITIONS; ALDEHYDES SO - European Journal of Organic Chemistry 2000 ;(14):2529-2533 1400 UI - 15186 AU - Nava A AU - Sencecal JL AU - Banales JL AU - Raymond I AU - Reyes PA AD - Inst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoCHU Montreal, Hop Notre Dame, Autoimm Res Lab, Montreal, PQ, CanadaReyes, PA, Inst Nacl Cardiol Ignacio Chavez, Mexico City, DF, Mexico TI - Absence of antiphospholipid/co-factor antibodies in Takayasu arteritis AB - There are anecdotal reports and small series describing the presence of anticardiolipin antibodies in patients with Takayasu Arteritis. This communication describes a systematic study searching for non-organ specific autoantibodies which includes antinuclear antibodies, anticardiolipin and anti-beta(2) GP(1) antibodies in a cohort of 28 Mexicans with angiographic definitive diagnostic of Takayasu Arteritis. Material and methods: Twenty-eight consecutive patients, who fulfilled classification and diagnostic criteria for Takayasu Arteritis and had a diagnostic panaortogram, were bled to study the presence of circulating autoantibodies in a cross-sectional design. Results: There were no antinuclear antibodies, although a few sera had faint cytoplasm fluorescent deposit and reacted with cell extract. We did not recognize a distinct pattern. Also, there was no IgG nor IgM anticardiolipin antibodies nor anticofactor antibodies of clinical interest. Discussion and conclusions: The presence of circulating non-organ specific autoantibodies is not a characteristic feature in Takayasu Arteritis when strict diagnostic criteria are applied. The occasional presence of such immune markers could be due to technical differences in sample management, less strict diagnosis or biological variability in certain cases, but has no diagnostic value. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0167-5273 UR - ISI:000089537800016 L2 - Takayasu arteritis;antiphospholipid antibodies;autoantibodies;AORTIC TISSUE SO - International Journal of Cardiology 2000 ;75():S99-S104 1401 UI - 14895 AU - Navarro-Garcia F AU - Pedroso M AU - Lopez-Revilla R AD - Inst Politecn Nacl, CINVESTAV, Dept Cell Biol, Mexico City 07000, DF, MexicoCtr Nacl Sanidad Agropecuaria, Immunol Lab, San Jose De Las Lajas, CubaNavarro-Garcia, F, Inst Politecn Nacl, CINVESTAV, Dept Cell Biol, Ap Postal 14-740, Mexico City 07000, DF, Mexico TI - Immunodulation of rat serum and mucosal antibody responses to Entamoeba histolytica trophozoites by beta-1,3-glucan and cholera toxin AB - Systemic and mucosal and immune responses can be manipulated with immunomodulators. Here we show the modulatory effects of cholera toxin (CT) and beta -1,3-glucan (GLU) on the rat antiamebic serum and fecal antibody responses to one or four intraperitoneal (IP) or intragastric (IG) doses of glutaraldehyde-fixed Entamoeba histolytica trophozoites (GFT). One IP dose of GPT maximized serum IgM and IgG antiamebic antibodies on days 4 and 9, respectively; CT coadministration increased IgM antibodies, whereas IgG titers increased with CT or GLU; coproantibodies were undetectable after GFT alone or coadministered with GLU, whereas CT coadministration maximized fecal IgA antibodies on day 6. One IG dose of GFT alone increased serum IgM and IgG antibodies 2.5 times and no further increases were detected using GLU, whereas CT doubled serum IgG antibodies; GFT did not affect the coproantibody responses, whereas GLU coadministration maximized IgG coproantibody levels on day 6 and CT increased IgG and IgA coproantibody levels on the same day. On the other hand, four IG doses of GFT alone or with GLU induced tolerance, whereas GFT alone via the IP route increased serum antibodies slightly and GLU coadministration increased serum IgG antibody titers 300-fold. CT coadministration by both routes increased IgA coproantibodies, and simultaneous CT+GLU coadministration induced lower responses than either CT or GLU. Different antiamebic immune responses might therefore be attained through the use of different immunization routes and immunomodulators to induce protective immunity against intestinal or extraintestinal amebiasis. (C) 2000 Academic Press MH - Cuba MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Immunology U5 - J;Article AV - English IS - 1521-6616 UR - ISI:000165380600013 L2 - amebiasis;cholera toxin;beta-1,3-glucan;ORAL IMMUNIZATION; IGA ANTIBODIES; PEYERS-PATCHES; IMMUNE-SYSTEM; CELLS; MICE; TISSUES SO - Clinical Immunology 2000 ;97(2):182-188 1402 UI - 15432 AU - Navarro-Gonzalez R AU - Mckay CP AU - Calva-Alejo L AU - Mvondo DN AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035, USA TI - Nitrogen fixation by lightning on early Earth and Mars MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246103765 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U695-U695 1403 UI - 15455 AU - Navarro O AU - Kaplan IG AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNavarro, O, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Theoretical study of hole-pair system in a periodical lattice AB - We investigate the statistics of the coupled hole pairs in a crystal lattice in high T-c superconductors, following the previously developed approach for the collective charge state (holon). The exact commutation relations for the hole pair operators correspond to a modified parafermi statistics of rank M' (M' is the number of sites in a "superlattice" formed by centers of mass for each hole pair), i.e, one state can be occupied by up to M' pairs. Even in the absence of dynamic interaction, the system of hole pairs is characterized by some immanent interaction (kinematic interaction), which depends on the hole-pairs concentration. In spite of the kinematic interaction, there is no statistical prohibition on the Bose-Einstein condensation of coupled hole pairs MH - France MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800088 L2 - ELECTRON SO - Physica Status Solidi B-Basic Research 2000 ;220(1):493-497 1404 UI - 15268 AU - ndrade-Cetto AA AU - Wiedenfeld H AU - Revilla MC AU - Sergio IA AD - Univ Nacl Autonoma Mexico, Dept Biol, Sch Sci, Mexico City 04510, DF, MexicoInst Pharmaceut, D-53121 Bonn, GermanyIMSS, SXXI, Natl Med Ctr, Metab Dis Res Unit, Mexico City, DF, MexicoAndrade-Cetto, AA, Univ Nacl Autonoma Mexico, Dept Biol, Sch Sci, Mexico City 04510, DF, Mexico TI - Hypoglycemic effect of Equisetum myriochaetum aerial parts on streptozotocin diabetic rats AB - The hypoglycemic effect of water as well as butanolic extracts prepared from aerial parts of Equisetum myri-ochaetum (Equisetaceae) was examined in streptozotocin induced diabetic rats. A single oral administration of the water extract (WE) at doses of 7 and 13 mg/kg and of the butanol extract (BE) at doses of 8 and 16 mg/kg significantly (P < 0.001) lowered the plasma glucose levels in diabetic rats after three hours of the administration. As a reference drug glibenclamide was used and showed, at a dose of 3 mg/kg, similar hypoglycemic effect like the tested extracts. Three kaempferol glucosides and one caffeoyl glucoside were isolated from the drug and were shown to be the main constituents in both extracts. (C) 2000 Published by Elsevier Science Ireland Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 19 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000089244700016 L2 - Equisetum myriochaetum;hypoglycemic effect;streptozotocin;diabetes;kaempferol glycosides SO - Journal of Ethnopharmacology 2000 ;72(1-2):129-133 1405 UI - 14789 AU - Negro J AU - Nieto LM AU - Fernndez DJ AD - Univ Valladolid, Dept Fs Ter, E-47011 Valladolid, SpainInst Politecn Nacl, CINVESTAV, Dept Fs, Mexico City 07000, DF, MexicoNegro, J, Univ Valladolid, Dept Fs Ter, E-47011 Valladolid, Spain TI - Darboux transformations for Lame potentials AB - Irreducible second order Darboux (SUSY) transformations are applied to Lam periodic Hamiltonians in order to find physically acceptable partner potentials with the same band structure. The main differences with the usual SUSY approach of potentials allowing for a discrete spectrum are pointed out MH - Mexico|Distrito Federal MH - Spain PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000165618100019 L2 - SUPERSYMMETRIC QUANTUM-MECHANICS; FACTORIZATION METHOD; SCHRODINGER-EQUATION; PERIODIC POTENTIALS; COHERENT STATES; SYSTEMS; SPECTRA SO - Czechoslovak Journal of Physics 2000 ;50(11):1303-1308 1406 UI - 15015 AU - Negro J AU - Nieto LM AU - Rosas-Ortiz O AD - Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoNegro, J, Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, Spain TI - Refined factorizations of solvable potentials AB - A generalization of the factorization technique is shown to be a powerful algebraic tool to discover further properties of a class of integrable systems in quantum mechanics. The method is applied in the study of radial oscillator, Morse and Coulomb potentials to obtain a wide set of raising and lowering operators, and to show clearly the connection that links these systems MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000090109300015 L2 - RADIAL SCHRODINGER-EQUATION; SCATTERING SO - Journal of Physics A-Mathematical and General 2000 ;33(40):7207-7215 1407 UI - 16314 AU - Nejmeddine M AU - Trugnan G AU - Sapin C AU - Kohli E AU - Svensson L AU - Lopez S AU - Cohen J AD - INRA, Lab Virol & Immunol Mol, F-78352 Jouy En Josas, FranceFac Med St Antoine, INSERM, U538, F-75012 Paris, FranceFac Med & Pharm Dijon, F-21034 Dijon, FranceKarolinska Inst, Swedish Inst Infect Dis Control, Dept Virol, S-17182 Solna, SwedenUNAM, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoCohen, J, INRA, Lab Virol & Immunol Mol, F-78352 Jouy En Josas, France TI - Rotavirus spike protein VP4 is present at the plasma membrane and is associated with microtubules in infected cells AB - VP4 is an unglycosylated protein of the outer layer of the capsid of rotavirus. It forms spikes that project from the outer layer of mature virions, which is mainly constituted by glycoprotein VP7. VP4 has been implicated in several important functions, such as cell attachment, penetration, hemagglutination, neutralization, virulence, and host range. Previous studies indicated that VP4 is located in the space between the periphery of the viroplasm and the outside of the endoplasmic reticulum in rotavirus-infected cells. Confocal microscopy of infected MA104 monolayers, immunostained with specific monoclonal antibodies, revealed that a significant fraction of VP4 was present at the plasma membrane early after infection. Another fraction of VP4 is cytoplasmic and colocalizes with beta-tubulin. Flow cytometry analysis confirmed that at the early stage of viral infection, VP4 was present on the plasma membrane and that its N-terminal region, the VP8* subunit, was accessible to antibodies. Biotin labeling of the infected cell surface monolayer with a cell-impermeable reagent allowed the identification of the noncleaved form of VP4 that was associated with the glycoprotein VP7. The localization of VP4 was not modified in cells transfected with a plasmid allowing the expression of a fusion protein consisting of VP4 and the green fluorescent protein. The present data suggest that VP4 reaches the plasma membrane through the microtubule network and that other viral proteins are dispensable for its targeting and transport MH - France MH - Mexico|Morelos MH - Sweden PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 36 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000085974400039 L2 - RHESUS ROTAVIRUS; ENDOPLASMIC-RETICULUM; EPITHELIAL-CELL; IN-VITRO; LOCALIZATION; SURFACE; KIDNEY; VIRUS; NEUTRALIZATION; HEMAGGLUTININ SO - Journal of Virology 2000 ;74(7):3313-3320 1408 UI - 14579 AU - Nelson KL AU - Jimenez BC AD - Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616, USANatl Autonomous Univ Mexico, Engn Inst, Treatment & Reuse Grp, Mexico City 04510, DF, MexicoNelson, KL, Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA TI - Sludge accumulation, properties and degradation in a waste stabilization pond in Mexico AB - The sludge layer in a primary, facultative wastewater stabilization pond in Texcoco, Mexico was studied. Five sludge cores were taken in the pond, near the entrance, middle. exit, and at the midpoint about 5 m from each side. Each core was stratified into four subsamples and analyzed. Temperature, pH, ORP, and %VS decreased with depth (age) in the sludge layer, whereas ammonia and TS concentrations increased. The concentrations of fecal coliforms and viable helminth eggs also decreased with depth in the sludge layer, but significant concentrations of both organisms were still present in the oldest sludge, which is estimated to be over seven years old (average). From a sludge depth survey it was found that the majority of the sludge accumulated near the inlet of the pond. The average net sludge accumulation rate was estimated to be 24 mm/yr MH - USA MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000166139100030 L2 - wastewater stabilization ponds;sludge;pathogens SO - Water Science and Technology 2000 ;42(10-11):231-236 1409 UI - 14771 AU - Nelson RA AU - Moldovanyi EP AU - Matcek CC AU - Azpiritxaga I AU - Bueno E AD - BP Amoco Corp, Houston, TX 77079, USAMaraven SA, Caracas, VenezuelaAndrews Grp, Mexico City, DF, MexicoNelson, RA, BP Amoco Corp, 200 WestLake Pk Blvd, Houston, TX 77079, USA TI - Production characteristics of the fractured reservoirs of the La Pat field, Maracaibo basin, Venezuela AB - La Pat oil field is one of the most famous, well-documented fractured reservoirs in the world. Since 1945 it has produced more than 830 million bbl of oil from both low porosity Cretaceous limestones and underlying granitic basement. The field is situated on a large inversion structure, partially uplifted in the late Eocene, having the majority of the inversion occurring in the Miocene-Pliocene. Fracture distributions, initial rate and cumulative production distributions, and trends in formation water chemistry all suggest that reservoir quality and reserves are controlled by natural fractures associated with Miocene-Pliocene and younger strike-slip faults and possibly by secondary microporosity related to the geometry of the earlier Eocene block uplift. Production levels within the area of Eocene uplift are anomalously high, with one well producing 59 million bbl of oil. Typical wells in other parts of the field produce 1 million bbl of oil. Analysis of the distributions cited previously suggests that production has occurred from highly elliptical to linear drainage areas surrounding faults. These restricted zones of fault-related fractures allow for communication of hydrocarbons stored in the low porosity rock carbonate matrix to the wellbore. In addition, diagenetic microporosity may be an important component in matrix storage in the carbonates and may be due to local subaerial exposure during the Eocene uplift. This article shows that analysis of the natural fracture system with respect to the production characteristics in even old fields can give rise to new reservoir models, leading to new infill locations within the field limits or additional exploration opportunities in the area MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - TULSA: AMER ASSOC PETROLEUM GEOLOGIST RP - NOT IN FILE U3 - TC 5 U4 - Energy & Fuels;Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-1423 UR - ISI:000165672000005 SO - Aapg Bulletin 2000 ;84(11):1791-1809 1410 UI - 14560 AU - Nespolo M AU - Isobe M AU - Iida J AU - Kimizuka N AD - Natl Inst Res Inorgan Mat, Res Ctr Creating New Mat, Tsukuba, Ibaraki 3050044, JapanSumitomo Met Min Co Ltd, Div Technol, Ichikawa, Chiba 2720835, JapanSonoma State Univ, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoNespolo, M, Natl Inst Res Inorgan Mat, Res Ctr Creating New Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan TI - Crystal structure and Charge Distribution of ErFeMnO4 AB - The structure of synthetic ErFeMnO4 has been refined by single-crystal X-ray diffraction. Space group is R (3) over barm, a=3.4831(1) Angstrom, c=25.609(4) Angstrom, V=269.07(5) Angstrom (3), Z=3. Er is in octahedral coordination, whereas Fe and Mn occupy a single crystallographic type of distorted trigonal bipyramid, with one of the two apical bonds shorter and the other longer than the three basal bonds. Assuming Er in the centre of symmetry R-1 = 0.031, but the Charge Distribution analysis suggests that the position of Er was not completely determined, and the Fourier difference indicates splitting of the Er cation around the centre of symmetry. Refinement in the split-atom model for Er lowers R-1 to 0.016, reduces the displacement parameter of Er and removes the anomalies in the Fourier difference. A deviation from the mean structure in this kind of compounds seems regularly associated with the presence of distorted trigonal bipyramids. (C) 2000 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Sonora PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000166233600015 L2 - semiconductors;chemical synthesis;crystal structure and symmetry;order-disorder effects;X-ray and X-ray spectroscopies;RESOLUTION ELECTRON-MICROSCOPY; M = INTEGER; MODULATED STRUCTURE; YFE2O4; YBFE2O4 SO - Journal of Alloys and Compounds 2000 ;313():59-64 1411 UI - 15197 AU - Nespolo M AU - Isobe M AU - Iida J AU - Kimizuka N AD - Natl Inst Res Inorgan Mat, Res Ctr Creating New Mat, Tsukuba, Ibaraki 3050044, JapanSumitomo Met Min Co Ltd, Div Technol, Chiba 2720835, JapanUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoNespolo, M, Natl Inst Res Inorgan Mat, Res Ctr Creating New Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan TI - Crystal structure and charge distribution of YbFeMnO4 AB - The structure of synthetic YbFeMnO4 has been refined by single-crystal X-ray diffraction. Space group R (3) over bar m, a = 3.4580 (1), c = 25.647 (3) Angstrom, V = 265.59 (3) Angstrom(3), Z = 3. Yb is in octahedral coordination, whereas Fe and Mn are disordered on a single crystallographic type of trigonal bipyramid, in which the cation is off-centred from the basal plane. Assuming perfect stoichiometry, R-1 = 0.0195, but the charge distribution (CD) analysis suggests incomplete occupation of the Yb site. Refinement of the occupancy lowers R-1 to 0.0175, resulting in s.o.f.(Yb) = 0.963 (3), with a significant improvement of the Fourier difference. The electroneutrality is likely preserved through incomplete occupancy of one of the two oxygen sites: the compound is thus non-stoichiometric, with the formula Yb0.963FeMnO3.945. Another mechanism for preserving the electroneutrality is the oxidation of a small amount of Mn2+ to Mn3+, which is, however, less probable because of the reduction conditions in which the sample was synthesized. Both models give a satisfactorily CD result, but they cannot be definitively distinguished by X-ray data MH - Japan MH - Mexico|Sonora PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 4 U4 - Crystallography U5 - J;Article AV - English IS - 0108-7681 UR - ISI:000089519400008 L2 - RESOLUTION ELECTRON-MICROSCOPY; M = INTEGER; HOMOLOGOUS COMPOUNDS; MODULATED STRUCTURE; PHASE-RELATIONS; SYSTEM; YFE2O4; GA; 1350-DEGREES-C; IN2O3(ZNO)(M) SO - Acta Crystallographica Section B-Structural Science 2000 ;56():805-810 1412 UI - 15039 AU - Nesterov AI AU - Sabinin LV AD - Univ Guadalajara, CUCEI, Dept Phys, Guadalajara 44430, Jalisco, MexicoRussian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk, RussiaQuintana Roo Univ, Dept Math, Chetumal, MexicoRussian Friendship Univ, Moscow, RussiaNesterov, AI, Univ Guadalajara, CUCEI, Dept Phys, Guadalajara 44430, Jalisco, Mexico TI - Nonassociative geometry: Towards discrete structure of spacetime AB - In the framework of nonassociative geometry a unified description of continuum and discrete spacetime is proposed. In our approach at the Planck scales the spacetime is described as a so-called diodular discrete structure which at large spacetime scales "looks like" a differentiable manifold. After a brief review of foundations of nonassociative geometry, we discuss the nonassociative smooth and discrete de Sitter spacetimes MH - Mexico|Quintana Roo MH - Mexico|Jalisco MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000089977200003 SO - Physical Review D 2000 ;6208(8): 1413 UI - 14617 AU - Neumann FJ AU - Gaspar J AU - Blanke H AU - Reimers B AU - Glogar D AD - Tech Univ Munich, D-8000 Munich, GermanyInst Nacl Cardiol Ignacio Chavez, Dept Intervent Cardiol, Mexico City, DF, MexicoMarienhosp, Gelsenkirchen, GermanyOsped Civile, Milan, ItalyUniv Vienna, Vienna, Austria TI - First clinical experience with the X-SIZER catheter in the treatment of in-stent restenosis: A retrospective analysis of multicenter outcomes MH - Austria MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0002-9149 UR - ISI:000165269800063 SO - American Journal of Cardiology 2000 ;86(8A):26I-26I 1414 UI - 14882 AU - Neumeier S AU - Kirchbach M AD - Univ Leipzig, Inst Theoret Phys, D-04109 Leipzig, GermanyUniv Mainz, Inst Kernphys, D-55099 Mainz, GermanyUAZ, Escuela Fis, Zacatecas 98068, ZAC, MexicoNeumeier, S, Univ Leipzig, Inst Theoret Phys, D-04109 Leipzig, Germany TI - On the eta and f(1)(1420) couplings to the nucleon AB - We consider neutral pseudoscalar, eta, and axial vector, f(1)(1420), mesons in the OZI-rule-respecting flavor basis, {((s) over bars), 1/root2((u) over baru + (d) over bard)}, and suggest a scenario for their coupling to the nucleon. Within this framework, the nonstrange parts of the etaN and f(1)N couplings are modeled by means of triangular a(o)piN, and KK*(Lambda/Sigma) vertices, while the strange ones partly proceed via Goldberger-Treiman relations, which have been concluded solely on the grounds of current universality. The suggested model explains the observed suppression of the etaN coupling with respect to the constituent quark model expectations, and predicts the coupling of f(1) with the nucleon MH - Germany MH - Mexico|Zacatecas PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000165298600004 L2 - PROTON; MESON; SPIN; SCATTERING; EXCHANGE; PI SO - International Journal of Modern Physics A 2000 ;15(27):4325-4339 1415 UI - 14494 AU - Ng PKL AU - Alvarez F AD - Natl Univ Singapore, Dept Biol Sci, Singapore 119260, SingaporeUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoNg, PKL, Natl Univ Singapore, Dept Biol Sci, Kent Ridge, Singapore 119260, Singapore TI - Villalobosus, a replacement name for Stygothelphusa Alvarez and Villalobos, 1991 (Crustacea : Brachyura : Pseudothelphusidae), preoccupied by Stygothelphusa Ng, 1989 (Crustacea : Brachyura : Gecarcinucidae) AB - The generic name of the troglobitic Mexican cave crab, Stygothelphusa Alvarez Villalobos, 1991 (Brachyura: Pseudothelphusidae), is preocupied by Stygothelphusa Ng, 1989 (Brachyura: Gecarcinucidae), a genus of cave crab from Borneo. A replacement name, Villalobosus, is here proposed for Stygothelphusa Alvarez & Villalobos, 1991 MH - Mexico|Distrito Federal MH - Singapore PB - SINGAPORE: NATL UNIV SINGAPORE, SCHOOL BIOLOGICAL SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0217-2445 UR - ISI:000166441500017 L2 - taxonomy;nomenclature;homonymy SO - Raffles Bulletin of Zoology 2000 ;48(2):337-337 1416 UI - 14591 AU - nguas-Velez BH AU - Civera-Cerecedo R AU - Cadena-Roa M AU - Guillaume J AU - Martinez-Diaz SE AD - Ctr Invest Biol Noroeste SC, Lab Nutr Acuicola, La Paz 23000, BCS, MexicoCtr Interdisciplinario Ciencias Marinas, Lab Biol Expt, La Paz 23096, BCS, MexicoUniv Autonoma Baja California Sur, Unidad Pichilingue Maricultivo, La Paz Pichilingue, BCS, MexicoIFREMER, INRA, Unite Mixte Nutr Poissons, F-29280 Plouzane, FranceCtr Interdisciplinario Ciencias Marinas, Lab Biol Expt, La Paz 23096, BCS, MexicoCivera-Cerecedo, R, Ctr Invest Biol Noroeste SC, Lab Nutr Acuicola, Apartado Postal 128, La Paz 23000, BCS, Mexico TI - Studies on the nutrition of spotted sand bass Paralabrax maculatofasciatus: Effect of the dietary protein level on growth and protein utilization in juveniles fed semipurified diets AB - Two feeding trials were conducted to determine the digestibility of a casein-based semipurified diet and the effects of different protein levels on growth and protein use of spotted sand bass Paralabrax maculatofasciatus juveniles. For trial I, a semipurified diet with vitamin-free casein as the sole source of protein was fed three times a day to apparent satiation, for a period of 20 d, Feces were collected by siphoning each tank. The digestibility of the experimental diet was high: 97% for protein, 89% for lipids, and 84% for gross energy, whereas that of organic matter was 78%. For trial II, seven diets mere formulated using vitamin-free casein at graded levels (25, 30, 35, 40, 45, 50, and 55% protein). Triplicate tanks for each dietary treatment were stocked with fish and fed by hand three times a day to apparent satiation for 6 wk, Performance of fish fed the different diets was evaluated for survival, percent weight gain, specific growth rate, feed conversion ratio, and protein efficiency ratio. Survival was 100% for all treatments. Growth of spotted sand bass juveniles increased as the dietary protein increased, but no evidence of reaching a plateau was found, The daily feed intake values showed an inverse relation to the protein content of the diets. The feed conversion ratio did not differ among diets containing 40% protein or greater. The results indicate that spotted sand bass juveniles with 2.5-g mean weight need at least 55% dietary protein for best growth when casein is the sole protein source. However, in terms of feed conversion ratio, the requirement apparently could be lower MH - France MH - Mexico|Baja California Sur PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000166177500008 L2 - AGE-0 STRIPED BASS; BODY-COMPOSITION; FEED-EFFICIENCY; REQUIREMENT; FISH SO - Journal of the World Aquaculture Society 2000 ;31(4):580-591 1417 UI - 14741 AU - Nichols WJ AU - Resendiz A AU - Seminoff JA AU - Resendiz B AD - Inst Nacl Pesca, Ensenada, Baja California, MexicoUniv Arizona, Sch Renewable Nat Resources, Tucson, AZ 85721, USACalif Acad Sci, Dept Herpetol, San Francisco, CA 94118, USANichols, WJ, Wildcoast, POB 752, Brookdale, CA 95007, USA TI - Transpacific migration of a loggerhead turtle monitored by satellite telemetry AB - The oceanic movements of a captive-raised adult loggerhead turtle (Caretta caretta) were monitored with satellite telemetry for 368 d from 10 August 1996 to 12 August 1997. During this time the turtle migrated across the Pacific Ocean, covering more than 11,500 km between Santa Rosaliita, Baja California, Mexico (28 degrees 40 'N, 114 degrees 14 'W), and Sendai Bay, Japan (37 degrees 54 'N, 140 degrees 56 'E). The average speed during the migration was 1.3 lan h(-1) and the maximum recorded speed was 1.84 km h(-1). Our findings are consistent with the hypothesis that loggerheads feeding in the eastern Pacific eventually return to nest on western Pacific beaches, a relationship previously inferred from molecular genetic analysis and flipper tag returns. We conclude that loggerhead turtles are capable of transpacific migrations and propose that the band of water between 25 degrees and 30 degreesN, the Subtropical Frontal Zone, may be an important transpacific migratory corridor MH - Mexico|Baja California MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 25 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000165750900006 L2 - SEA-TURTLES; CARETTA-CARETTA; CHELONIA-MYDAS; TRACKING; NAVIGATION; MARKERS SO - Bulletin of Marine Science 2000 ;67(3):937-947 1418 UI - 16351 AU - Nicoli MP AU - Haas F AU - Freeman RM AU - Szilner S AU - Basrak Z AU - Morsad A AU - Satchler GR AU - Brandan ME AD - Inst Rech Subatom, IN2P3, CNRS, UMR 7500, F-67037 Strasbourg 2, FranceUniv Strasbourg 1, F-67037 Strasbourg, FranceRudjer Boskovic Inst, Zagreb, CroatiaUniv Hassan II, Fac Sci Ben Msik, Casablanca, MoroccoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNicoli, MP, Inst Rech Subatom, IN2P3, CNRS, UMR 7500, BP28, F-67037 Strasbourg 2, France TI - Detailed study and mean field interpretation of O-16+C-12 elastic scattering at seven medium energies AB - Detailed measurements of the elastic scattering of O-16 ions from C-12 have been carried out at seven energies from 62 to 124 MeV, at center-of-mass angles from about 10 degrees to about 145 degrees. A coherent optical model analysis of these data has been performed using both the Woods-Saxon and the folding-model potentials. The extracted results are consistent with analyses of data at higher energies for this and similar light heavy-ion systems. Some model-independent spline forms for the real potentials were also investigated MH - Croatia MH - France MH - Mexico|Distrito Federal MH - Morocco MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000085792500042 L2 - C-12+C-12 SCATTERING; NUCLEAR-MATTER SO - Physical Review C 2000 ;6103(3): 1419 UI - 15137 AU - Nielsen DI AU - Ebert PR AU - Page RE AU - Hunt GJ AU - Guzman-Novoa E AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAUniv Queensland, Dept Biochem, St Lucia, Qld 4072, AustraliaUniv Queensland, Dept Entomol, St Lucia, Qld 4072, AustraliaUniv Queensland, Cooperat Res Ctr Trop Pest Management, St Lucia, Qld 4072, AustraliaPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USASAGAR, INIFAP, CENTIFMA, Metepec 52140, Edo, MexicoNielsen, DI, Univ Calif Davis, Dept Entomol, Davis, CA 95616, USA TI - Improved polymerase chain reaction-based mitochondrial genotype assay for identification of the africanized honey bee (Hymenoptera : Apidae) AB - A polymerase chain reaction (PCR)-based restriction fragment-length polymorphism (RFLP) assay was developed that discriminates among the 4 mitotypes found in North, Central, and South American honey Lee racial groups-eastern European (Apis mellifera ligustica Spinola, caucasica Gorbachev, and carnica Pollman),western European (A. m, mellifera Linnaeus),Egyptian (A. m. lamarckii Cockerell Lepeletier), and sub-Saharan African (A. In. scutellata). Before the development of this assay, 13% of southern Californian feral Lees collected before the arrival of the Apis mellifera scutellata (Africanized) race were found to contain a non-European mitochondrial genotype that could not be distinguished from that of A. m. scutellata. DNA sequence analysis suggests the unusual mitotype to be that of A. m. lamarckii. An RFLP polymorphism was identified that distinguished this subspecies from all others present in North America. This polymorphism was not found in any of BG bees collected primarily in Mexico and Central America. Thus, the Egyptian mitochondrial type is either absent or extremely rare in these regions. The PCR assay also distinguishes A. m. lamarckii from 2 other north African racial types, A. m. intermissa Buttel-Reepen and A. m. sahariensis Baldensperger MH - Australia MH - Mexico|Estado De Mexico MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 19 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000089631600001 L2 - Apis mellifera scutellata;Apis mellifera lamarckii;mitochondrial genotype;polymerase chain reaction;race identification;Africanized;APIS-MELLIFERA; EUROPEAN HONEYBEES; DNA; POPULATIONS; POLYMORPHISMS; SEQUENCE; MARKERS; BRAZIL SO - Annals of the Entomological Society of America 2000 ;93(1):1-6 1420 UI - 15229 AU - Nigenda G AU - Machado MH AD - Natl Inst Publ Hlth, Ctr Hlth Syst Res, Cuernavaca 62508, Morelos, MexicoOsvaldo Cruz Fdn, Natl Sch Publ Hlth, Rio De Janeiro, BrazilNigenda, G, Natl Inst Publ Hlth, Ctr Hlth Syst Res, Ave Univ 655,Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - From State to market: the Nicaraguan labour market for health personnel AB - Few countries in Latin America have experienced in such a short period the shift From a socialist government and centrally planned economy to a liberal market economy as Nicaragua. The impact of such a change in the health field has been supported by the quest for reform of the health system and the involvement of external financial agencies aimed at leading the process. However, this change has not been reflected in the planning of human resources for health. Trends in education reflect the policies of past decades. The Ministry of Health is the main employer of health personnel in the country, but in recent years its capacity to recruit new personnel has diminished. Currently, various categories of health personnel are looking for new opportunities in a changing labour environment where new actors are appearing and claiming an influential role. It may take more than political willingness from the government to redefine the new priorities in the field of human resources for health and subsequently turn it into positive action MH - Brazil MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Article AV - English IS - 0268-1080 UR - ISI:000089390600010 L2 - MEDICAL EMPLOYMENT; URBAN MEXICO; SYSTEM; CARE; IMBALANCES; WAR SO - Health Policy and Planning 2000 ;15(3):312-318 1421 UI - 16389 AU - Nigh R AU - Benbrook C AU - Brush S AU - Garcia-Barrios L AU - Ortega-Paczka R AU - Perales HR AD - Ctr Invest & Estudios Super Antropol Social Sures, San Cristobal Las Casas 28247, Chiapas, MexicoBenbrook Consulting Serv, Sandpoint, ID 83864, USAUniv Calif Davis, Davis, CA 95616, USAColegio Frontera Sur, Div Sistemas Prod Alternat, San Cristobal las Casas 29290, Chiapas, MexicoUniv Autonoma Chapingo, Direcc Ctr Reg, Chapingo 56230, MexicoColegio Frontera Sur, Dept Agroecol, San Cristobal las Casas 29290, Chiapas, MexicoNigh, R, Ctr Invest & Estudios Super Antropol Social Sures, Carretera S Juan Chamula Km 3 5, San Cristobal Las Casas 28247, Chiapas, Mexico TI - Transgenic crops: A cautionary tale MH - Mexico|Estado De Mexico MH - Mexico|Chiapas MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000085902800016 SO - Science 2000 ;287(5460):1927-1927 1422 UI - 16179 AU - Niklas KJ AU - Molina-Freaner F AU - Tinoco-Ojanguren C AU - Paolillo DJ AD - Cornell Univ, Dept Plant Biol, Ithaca, NY 14853, USAUNAM, Inst Ecol, Hermosillo 83000, Sonora, MexicoNiklas, KJ, Cornell Univ, Dept Plant Biol, Ithaca, NY 14853, USA TI - Wood biomechanics and anatomy of Pachycereus pringlei AB - We report the longitudinal, biomechanical, and anatomical trends observed for tissue samples drawn from the parallel aligned, prismatic woody vascular bundles running the length of a Pachycereus pringlei plant measuring 5.22 m in height. The main vertical stem of this plant was cut into five segments (labeled A through E in the acropetal direction) measuring similar to 1.02 m in length. Four of the 14 vascular bundles in each segment were surgically removed to obtain 20 vascular bundle segments that were tested in bending to determine their stiffness measured in the radial E-R and tangential E-T direction. We also determined the lignin content of representative samples of wood. A nonlinear trend in stiffness was observed: E-R and E-T were highest in segments B or C (1.67 GN/m(2) and 1.09 GN/m(2), respectively), lower in segment A (E-R = 1.18 GN/m(2) and E-T = 0.35 GN/m(2)), and lowest in segment E (E-R = 0.03 GN/m(2) and E-T = 0.20 GN/m(2)). Similar longitudinal trends were seen for axial tissue volume fraction and fiber wall thickness, which achieved their highest values in segment B (69.8% and 6.59 mu m, respectively). Wood stiffness also correlated significantly with cell wall lignin content: with respect to segment B (which had the highest Lignin content, and was thus used as the standard reference for percent lignin content), lignin content, was 15, 60, 85, and 43% in segments E, D, C, and A, respectively. Fiber cell length, which increased toward the base of the stem and toward the vascular cambium in the most proximal vascular bundle segment, did not correlate with E-R or E-T. Basic engineering principles were used to calculate stem stresses resulting from self-loading and any wind-induced bending moment (produced by drag forces). Calculations indicated that the less stiff wood produced in segment A eliminates a rapid and potentially dangerous increase in stresses that would otherwise occur in segments B or C. The less stiff wood in segment A also reduces the probability of shear failure at the cellular interface between the wood and surrounding tissues in this portion of the stem. We conclude that P. pringlei wood stiffness is dependent on the volume fraction and lignification of axial tissues, less so on fiber wall thickness, and that wood development in this species is adaptively responsive to self-loading and differentially applied external mechanical forces MH - Mexico|Sonora MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000086527000003 L2 - biomechanics;Cactaceae;lignin;plant stems;Young's modulus;vascular tissues;wind drag;wood;LIGNIN SO - American Journal of Botany 2000 ;87(4):469-481 1423 UI - 16336 AU - Niquet J AU - Perez-Martinez L AU - Guerra M AU - Grouselle D AU - Joseph-Bravo P AU - Charli JL AD - Univ Nacl Autonoma Mexico, Dept Genet & Fisiol Mol, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoInst Natl Sante & Rech Biomed, U159, F-75014 Paris, FranceCharli, JL, Univ Nacl Autonoma Mexico, Dept Genet & Fisiol Mol, Inst Biotecnol, AP 510-3, Cuernavaca 62271, Morelos, Mexico TI - Extracellular matrix proteins increase the expression of pro-TRH and pro-protein convertase PC1 in fetal hypothalamic neurons in vitro AB - External clues for neuron development include extracellular matrix (ECM) molecules. To explore ECM influence on the early development of peptide phenotype in the CNS, we have compared pro-TRH levels in primary cultures of rat hypothalamic cells plated either on poly-lysine (PL) (control) or on PL plus one of various ECM molecules at 10 mu g/ml. Fetal day 17 cells plated at a density of 1250/mm(2) were grown in a serum free medium made of Neurobasal medium supplemented with B27 (GIBCO). Cultures, consisting mainly of neurons, were analyzed at DIV 2. ECM proteins induced morphological effects in agreement with previously published studies. The amount of pro-TRH per dish, quantified by Western blotting, was increased to 275% for laminin, 191% for fibronectin and 173% for tenascin-C (control = 100%); there was no effect of vitronectin. Laminin or fibronectin did not change pro-TRH mRNA or TRH levels but enhanced levels of the pro-protein convertase PCI suggesting that the ECM molecules did regulate the translational status of pro-TRH. In conclusion we have shown that some ECM proteins increased pro-TRH level in vitro; this may contribute to the enhancement of pro-TRH levels observed early in vivo in the hypothalamus. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Developmental Biology;Neurosciences U5 - J;Article AV - English IS - 0165-3806 UR - ISI:000086006300006 L2 - TRH;pro-TRH;hypothalamus;laminin;fibronectin;vitronectin;tenascin-C;pro-protein convertase PC1;PROTHYROTROPIN-RELEASING HORMONE; ANCHORAGE-DEPENDENT FIBROBLASTS; MESSENGER-RNA; NEURITE OUTGROWTH; PROHORMONE CONVERTASES; RAT-BRAIN; LAMININ; MOUSE; COEXPRESSION; ATTACHMENT SO - Developmental Brain Research 2000 ;120(1):49-56 1424 UI - 16600 AU - Nissen PE AU - Chen YQ AU - Schuster WJ AU - Zhao G AD - Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, DenmarkBeijing Normal Univ, Dept Astron, Beijing 100875, Peoples R ChinaChinese Acad Sci, Beijing Astron Observ, Beijing 100012, Peoples R ChinaUNAM, Natl Astron Observ, Ensenada 22800, Baja California, MexicoNissen, PE, Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark TI - Sc and Mn abundances in disk and metal-rich halo stars AB - Sc and Mn abundances are determined for 119 F and G main-sequence stars with -1.4 < [Fe/H] < +0.1, representing stars from the thin disk, the thick disk and the halo. The results indicate that Sc behaves like an a element, showing a decreasing [Sc/Fe] with increasing metallicity in disk stars and a dual pattern in the kinematically selected halo stars. In contrast, Mn shows an increase from [Mn/Fe] similar or equal to -0.5 at [Fe/H] = -1.4 to zero at solar metallicity. There appears to be a discontinuity or sharp increase of [Mn/Fe] at [Fe/H] similar or equal to -0.7 corresponding to the transition between the thick and the thin disk. It is discussed if supernovae of Type Ta are a major source of Mn in the Galactic disk or if the trend of [Mn/Fe] vs. [Fe/H] can be explained by nucleosynthesis in Type II supernovae with a strong nn metallicity dependence of the yield MH - Denmark MH - Mexico|Baja California MH - Peoples R China PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 41 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000084937700033 L2 - nuclear reactions, nucleosynthesis, abundances;stars : abundances;stars : late-type;Galaxy : evolution;Galaxy : halo;Galaxy : solar neighbourhood;POOR STARS; CHEMICAL-COMPOSITION; EVOLUTION; HYDROGEN; LINES SO - Astronomy and Astrophysics 2000 ;353(2):722-728 1425 UI - 15925 AU - Noguera-Obenza MA AU - Gomez HF AU - Herrera-Insua I AU - Ruiz-Palacios GM AU - Pickering LK AU - Cleary TG AD - Univ Texas, Div Pediat Infect Dis, Houston, TX, USAEastern Virginia Med Sch, Norfolk, VA 23501, USAInst Nacl Nutr, Mexico City, DF, Mexico TI - Breast milk sIgA against LEE-Encoded proteins of shigatoxin producing Escherichia coli MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000086155301604 SO - Pediatric Research 2000 ;47(4):272A-272A 1426 UI - 13885 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - Brane-world cosmology in higher derivative gravity or warped compactification in the next-to-leading order of AdS/CFT correspondence AB - The general model of higher-derivative (HD) gravity is considered. The search of brane-world cosmology in such theory is presented when bulk is d5 AdS and boundary is spherical, hyperbolic or at (single) brane. It is found the wide range of theory parameters where such cosmology may be realized. Special attention is paid to the version of HD theory representing SG dual of N = 2 Sp(N) SCFT (in next-to-leading order of large-N expansion). In particular, it is shown that inflationary brane Universe does not occur for SG dual while hyperbolic brane occurs (which was not possible in leading order). The quantum effects of CFT living on the brane (via the corresponding conformal anomaly induced effective action) may qualitatively change the results of classical analysis. There appears inflationary (or hyperbolic) brane Universe induced by only quantum effects. In AdS/CFT correspondence (next-to-leading order) the addition of such CFT effective action (in some energy region) is naturally explained in terms of holographic renormalization group. It results in the possibility of quantum creation of inflationary brane Universe (with small rate) even for SG dual MH - Japan MH - Mexico|Guanajuato PB - SIENA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 105 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000168153900048 L2 - superstrings and heterotic strings;D-branes;AdS-CFT correspondance;RANDALL-SUNDRUM MODEL; EXTRA DIMENSION; MODULUS STABILIZATION; QUANTUM GRAVITY; DOMAIN-WALLS; ART.; INFLATION; RENORMALIZATION; HIERARCHY; UNIVERSE SO - Journal of High Energy Physics 2000 ;2000(7): 1427 UI - 14608 AU - Nojiri S AU - Odintsov SD AU - Zerbini S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoUniv Trent, Dept Phys, I-38050 Trent, ItalyUniv Trent, Grp Collegato, Ist Nazl Fis Nucl, I-38050 Trent, ItalyNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - Bulk versus boundary (gravitational Casimir) effects in the quantum creation of an inflationary brane-world universe AB - The role of bulk matter quantum effects (via the corresponding effective potential discussed using the example of a conformal scalar) and of boundary matter quantum effects (via the conformal anomaly induced effective action) is considered in brane-world cosmology. A scenario is used where brane tension is not a free parameter, and the initial classical bulk-brane action is defined by some considerations. The effective bulk-brane equations of motion are also analysed. The quantum creation of a four-dimensional de Sitter or anti-de Sitter (AdS) brane universe living in five-dimensional AdS space is possible when quantum bulk and/or brane matter is taken into account. The consideration of only conformal field theory (CFT) living on the brane admits the full analytical treatment. The bulk gravitational Casimir effect leads to deformations of five-dimensional AdS space and spherical/hyperbolic brane shapes. The generalization of the above scenario to dominant bulk quantum gravity naturally represents this scenario as self-consistent warped compactification within an AdS/CFT set-up MH - Italy MH - Japan MH - Mexico|Guanajuato PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 60 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000166137700006 L2 - EXTRA DIMENSION; COMPACTIFICATION; GRAVITY SO - Classical and Quantum Gravity 2000 ;17(23):4855-4866 1428 UI - 14626 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Math & Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoOchanomizu Univ, Dept Phys, Tokyo 112, JapanNojiri, S, Natl Def Acad, Dept Math & Phys, Yokosuka, Kanagawa 239, Japan TI - Finite action in 5D gauged supergravity and the dilatonic conformal anomaly for dual quantum field theory AB - Gauged supergravity (SG) with a single scalar (dilaton) and arbitrary scalar potential is considered. Such dilatonic gravity describes special renormalization group flows in extended SG where scalars lie in a one-dimensional submanifold of total space. The surface counterterm and finite action for such gauged SG in three-, four-, and five-dimensional asymptotically AdS space are derived. Using a finite action and a consistent gravitational stress tensor (local surface counterterm prescription! the regularized expressions for free energy, entropy, and mass of a 4D dilatonic AdS black hole are found. The same calculation is done within standard reference background subtraction. The dilaton-dependent conformal anomaly from 3D and 5D gauged SGs is calculated using AdS conformal field theory correspondence, Such an anomaly should correspond to two- and four-dimensional dual quantum held theory which is classically and not exactly conformally invariant, respectively. The candidate c functions from 3D and 5D SGs are suggested. These c functions which have fixed points in an asymptotically AdS region are expressed in terms of a dilatonic potential and they are positively defined and monotonic for a number of potentials MH - Japan MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 33 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000166039900030 L2 - ADS-CFT CORRESPONDENCE; ADS/CFT CORRESPONDENCE; STRING THEORY; YANG-MILLS; DIMENSIONS SO - Physical Review D 2000 ;6212(12): 1429 UI - 14750 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoOchanomizu Univ, Dept Phys, Bunkyo Ku, Tokyo 1120012, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Scheme-dependence of holographic conformal anomaly in d5 gauged supergravity with non-trivial bulk potential AB - Bosonic sector of d5 gauged supergravity with specific parametrization of full scalar coset is considered (multi-dilaton gravity). Using holographic RG in the form suggested by de Boer-Verlinde-Verlinde the holographic d4 conformal anomaly (in the sector of curvature invariants) is found when bulk potential is not constant. Its comparison with the earlier calculation done in the scheme where expansion of metric and dilaton over radial coordinate of AdS space is used demonstrates scheme dependence of holographic conformal anomaly. In AdS/CFT correspondence where dilatons play role of coupling constants it coincides with multi-loop conformal anomaly which depends on regularization scheme in interacting dual QFT. Hence, scheme dependence of holographic conformal anomaly is consistent with dual QFT expectations. (C) 2000 Published by Elsevier Science B.V MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000165679400019 L2 - ADS/CFT CORRESPONDENCE SO - Physics Letters B 2000 ;494(3-4):318-324 1430 UI - 14776 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanTomsk State Pedag Univ, Tomsk, RussiaUniv Guanajuato, Inst Fis, Leon, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - AdS/CFT correspondence in cosmology AB - The attempt to understand if AdS/CFT correspondence may be realized as the one between some AdS-like cosmological space and CFT living on the boundary is made. In order to obtain such cosmology we exchange the time and radial coordinates in d5 Schwarzschild-anti-de Sitter (S-AdS) BH (with corresponding signature change). The test on proportionality of free energies from such d5 cosmological space (after AdS/CFT identification of parameters) and from N = 4SU(N) super Yang-Mills quantum theory is successfully passed. (C) 2000 Published by Elsevier Science B.V MH - Japan MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000165571500019 L2 - CONSTANT SO - Physics Letters B 2000 ;494(1-2):135-140 1431 UI - 14818 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanTomsk State Pedag Univ, Tomsk 634041, RussiaUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - Can we live on the brane in Schwarzschild-anti de Sitter black hole? AB - The model of d5 higher derivative (HD) gravity admitting Schwarzschild-anti de Sitter black hole (S-ADS BH) as exact solution is considered. The surface counterterms are added to the complete action, they are fixed by the condition of finiteness of bulk AdS spacetime when brane goes to infinity. As a result the brane (observable Universe) is defined dynamically in terms of d5 theory parameters (brane tension is fixed). Brane radius is always bigger than horizon radius and the 4d Universe itself could be static or inflationary Natural generalization of this model gives warped compactification (with dynamically generated brane) in the next-to-leading order of AdS/CFT correspondence. (C) 2000 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000165479500023 L2 - EXTRA DIMENSION; QUANTUM GRAVITY SO - Physics Letters B 2000 ;493(1-2):153-161 1432 UI - 14864 AU - Nojiri S AU - Obregon O AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - (Non)-singular brane-world cosmology induced by quantum effects in five-dimensional dilatonic gravity AB - 5D dilatonic gravity (bosonic sector of gauged supergravity) with a nontrivial bulk potential and with surface terms (boundary cosmological constant and trace anomaly induced effective action for brane quantum matter) is considered. For a constant bulk potential and maximally SUSY Yang-Mills theory (CFT residing on the brane) the inflationary brane world is constructed. The bulk is singular asymptotically AdS space with a nonconstant dilaton and a dilatonic de Sitter or hyperbolic brane is induced by quantum matter effects. At the same time, the dilaton on the brane is determined dynamically. All this is a natural realization of warped compactification in the AdS/CFT correspondence. For a fine-tuned toy example of a nonconstant bulk potential we find the nonsingular dilatonic brane world where the bulk again represents asymptotically AdS space and a de Sitter brane (inflationary phase of the observable Universe) is induced exclusively by quantum effects. The radii of the brane and dilaton are determined dynamically. The analytically solvable example of the exponential bulk potential leading to a singular asymptotically AdS dilatonic bulk space with a de Sitter (or hyperbolic) brane is also presented. In all cases under discussion the gravity on the brane is trapped via the Randall-Sundrum scenario. It is shown that qualitatively the same types of brane worlds occur when quantum brane matter is described by N dilaton coupled spinors MH - Japan MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 48 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000165341600036 L2 - SUPER YANG-MILLS; EXTRA DIMENSION; ADS/CFT CORRESPONDENCE; SCALE-INVARIANCE; INFLATION; UNIVERSE SO - Physical Review D 2000 ;6210(10): 1433 UI - 14959 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoOchanomizu Univ, Dept Phys, Tokyo 1120012, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Holographic conformal anomaly with bulk scalars potential from d3 and d5 gauged supergravity AB - d3 and d5 maximally SUSY gauged supergravities are considered in the parameterization (flow) of the full scalar coset, where the kinetic term for scalars takes the standard field theory form and the bulk potential is an arbitrary one subject to consistent parameterization. From such SG duals, we calculate d2 and d4 holographic conformal anomalies which depend on the bulk scalar potential. AdS/CFT correspondence suggests that such an SG-side conformal anomaly should be identified with a (non-perturbative) QFT conformal anomaly (taking account of radiative corrections) for the theory on the boundary of the AdS space. In the limit of a constant bulk potential and a single scalar, the d4 result reproduces the known exact conformal anomaly corresponding to maximally SUSY super Yang-Mills theory coupled to N = 4 conformal supergravity MH - Japan MH - Mexico|Guanajuato PB - KYOTO: PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0033-068X UR - ISI:000165116400012 SO - Progress of Theoretical Physics 2000 ;104(4):867-876 1434 UI - 15667 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Math & Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon, MexicoNojiri, S, Natl Def Acad, Dept Math & Phys, Yokosuka, Kanagawa 239, Japan TI - Weyl anomaly from Weyl gravity AB - We calculate the conformal anomaly from 5-D Weyl gravity (with broken conformal symmetry) which is conjectured to be supergravity dual to N = 2 superconformal field theory via AdS/CFT correspondence. Its comparison with N = 2 SCFT conformal anomaly (uv calculation) suggests that such duality may exist subject to the presence of subleading 1/N corrections to cosmological and gravitational constants MH - Japan MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000088184700004 SO - Modern Physics Letters A 2000 ;15(16):1043-1049 1435 UI - 15704 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - Brane world inflation induced by quantum effects AB - We consider a brane-world universe where an arbitrary large N quantum CFT is living on the domain wall. This corresponds to the implementation of a Randall-Sundrum compactification within the context of AdS/CFT correspondence. Using the anomaly induced effective action for the domain wall CFT the possibility of a self-consistent quantum creation of the 4d de Sitter wall Universe (inflation) is demonstrated, In case of the maximally SUSY Yang-Mills theory the exact correspondence with radius and effective tension found by Hawking-Hertog-Reall is obtained. The hyperbolic wall Universe may be induced by quantum effects only for exotic matter (higher derivatives conformal scalar) which has unusual sign of the central charge. (C) 2000 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 124 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000087960300016 L2 - CONFORMAL SECTOR; EXTRA DIMENSION; GRAVITY SO - Physics Letters B 2000 ;484(1-2):119-123 1436 UI - 14806 AU - Nouvellon Y AU - Begue A AU - Moran MS AU - Lo Seen D AU - Rambal S AU - Luquet D AU - Chehbouni G AU - Inoue Y AD - USDA ARS, SWRC, SW Watershed Res Ctr, Tucson, AZ 85719, USACIRAD, AMIS, Montpellier, FranceCEFE, CNRS, DREAM Unit, Montpellier, FranceORSTOM, IMADES, Hermosillo, Sonora, MexicoNatl Inst Agroenvironm Sci, Ibaraki, Osaka, JapanNouvellon, Y, USDA ARS, SWRC, SW Watershed Res Ctr, 2000 E allen Rd, Tucson, AZ 85719 USA TI - PAR extinction in shortgrass ecosystems: effects of clumping, sky conditions and soil albedo AB - The amount of photosynthetically active radiation (PAR) absorbed by a canopy (APAR) is an important driving variable for vegetation processes such as photosynthesis. PAR extinction in clumped canopies of shortgrass ecosystems is the focus of this paper. Directional gap fractions estimated at peak biomass on several Mexican shortgrass ecosystems with a hemispherical radiation sensor (Li-Cor, LAI-2000) were higher than those predicted by a Poisson model assuming a random leaf dispersion (RLD), LAI-2000-estimated gap fractions, together with independent estimations of plant area index (PAI), and leaf and stem angle distribution (LSAD) were used for estimating the angular course of a leaf dispersion parameter lambda(theta). Radiation extinction coefficients simulated for all solar zenith angles using Markov chain processes and estimated lambda(theta) were subsequently incorporated in a simple radiative transfer model for estimating the efficiencies of instantaneous and daily integrated PAR interception and absorption, and for studying the effects of clumping, sky conditions and soil albedo on PAR absorption. For clear sky condition, instantaneous PAR absorption showed marked directional effects, therefore indicating that using a constant extinction coefficient in canopy photosynthesis models working at hourly time step would be inaccurate. The effects of clumping, sky conditions and soil albedo were all found to be significant for low PAI, and decreased with higher PAI. As shortgrass ecosystems are characterized by low PAI, neglecting these effects would give inaccurate estimations of PAR absorption. Daily PAR absorption was found to be significantly higher than PAR interception for low PAI, especially when soil albedo was high, and lower than PAR interception for high PAI. These results indicate that in canopy photosynthesis models where APAR is estimated from simple exponential-like relationships calibrated using PAR interception measurements, the PAR available for photosynthesis might be significantly underestimated in the first stages of the growth, and may be overestimated in the later stages of the growing season. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - France MH - Japan MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800003 L2 - PAR interception;PAR absorption;extinction coefficient;Markov model;shortgrass ecosystem;PHOTOSYNTHETICALLY ACTIVE RADIATION; LEAF-AREA INDEX; VEGETATION CANOPIES; PLANT CANOPIES; BIDIRECTIONAL REFLECTANCE; HEMISPHERICAL PHOTOGRAPHY; ANGLE DISTRIBUTIONS; SAHELIAN VEGETATION; TRANSFER MODELS; CORN CANOPIES SO - Agricultural and Forest Meteorology 2000 ;105(1-3):21-41 1437 UI - 16516 AU - Nouvellon Y AU - Rambal S AU - Lo Seen D AU - Moran MS AU - Lhomme JP AU - Begue A AU - Chehbouni AG AU - Kerr Y AD - CIRAD, F-34093 Montpellier 5, FranceCNRS, DREAM CEFE, UPR 9056, F-34293 Montpellier, FranceUSDA ARS, Phoenix, AZ, USAORSTOM, CICTUS, Hermosillo, Sonora, MexicoORSTOM, IMADES, Hermosillo, Sonora, MexicoCESBIO, CNES, Toulouse, FranceNouvellon, Y, USDA, ARS, USWCL, SW Watershed Res Ctr, 2000 E Allen Rd, Tucson, AZ 85719 USA TI - Modelling of daily fluxes of water and carbon from shortgrass steppes AB - A process-based model for semi-arid grassland ecosystems was developed. It is driven by standard daily meteorological data and simulates with a daily time step the seasonal course of root, aboveground green, and dead biomass. Water infiltration and redistribution in the soil, transpiration and evaporation are simulated in a coupled water budget submodel. The main plant processes are photosynthesis, allocation of assimilates between aboveground and belowground compartments, shoots and roots respiration and senescence, and litter fall. Structural parameters of the canopy such as fractional cover and LAI are also simulated. This model was validated in southwest Arizona on a semi-arid grassland site. In spite of simplifications inherent to the process-based modelling approach, this model is useful for elucidating interactions between the shortgrass ecosystem and environmental variables, for interpreting H2O exchange measurements, and for predicting the temporal variation of above- and belowground biomass and the ecosystem carbon budget. Published by Elsevier Science B.V MH - USA MH - France MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000085397900004 L2 - simulation model;water and carbon fluxes;shortgrass ecosystem;arid environment;SALSA program;MULTISPECTRAL SATELLITE DATA; SAHELIAN GRASSLAND MODEL; SIMULATION-MODEL; PLANT-GROWTH; PRIMARY PRODUCTIVITY; BIOMASS DYNAMICS; UNITED-STATES; LIMITED DATA; ENERGY; EFFICIENCIES SO - Agricultural and Forest Meteorology 2000 ;100(2-3):137-153 1438 UI - 14762 AU - Novoseltsev VN AU - Carey J AU - Liedo P AU - Novoseltseva J AU - Yashin AI AD - Max Planck Inst Demog Res, D-18057 Rostock, GermanyInst Control Sci, Moscow, RussiaUniv Calif Davis, Davis, CA 95616, USAECOSUR, El Coledgio Frontera, Tapachula, Chaipas, MexicoYashin, AI, Max Planck Inst Demog Res, 114 Doberanerstr, D-18057 Rostock, Germany TI - Anticipation of oxidative damage decelerates aging in virgin female medflies: hypothesis tested by statistical modeling AB - Empirical analysis of survival data obtained from large samples of Mediterranean fruit flies shows that the trajectory of the mortality rate for virgin females departs from that for females maintained in mixed sex cages. It increases, decelerates, reaches its maximum, declines and then increases again within the reproductive interval. Non-virgin females, however, display an early-age plateau instead of this dip. We assume that these deviations are produced by the interplay between changes in oxygen consumption associated with reproductive behavior and the antioxidant defense that acts against anticipated oxidative damage caused by reproduction. Since there are no data on antioxidant mechanisms in medflies available that explain the observed patterns of mortality, we develop a model of physiological aging based on oxidative stress theory, which describes age-related changes in oxygen consumption and in antioxidative capacity during the reproductive period. Using this model, we simulate virtual populations of 25,000 virgin and non-virgin flies, calculate the respective mortality rates and show that they practically coincide with those of experimental populations. We show that the hypothesis about the biological support of reproduction used in our model does not contradict experimental data. The model explains how the early-age dip and plateau might arise in the mortality rates of female medflies and why the male mortality pattern does not exhibit such deviations. (C) 2000 Elsevier Science Inc. All rights reserved MH - Germany MH - Mexico|Chiapas MH - Russia MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Geriatrics & Gerontology U5 - J;Article AV - English IS - 0531-5565 UR - ISI:000165680400007 L2 - aging;reproduction;modeling;virtual populations;oxidative damage;medflies;AGE-SPECIFIC MORTALITY; DROSOPHILA-MELANOGASTER; LIFE-SPAN; GENETIC-ANALYSIS; METABOLIC-RATE; LONGEVITY; REPRODUCTION; SUPEROXIDE; CATALASE; COHORTS SO - Experimental Gerontology 2000 ;35(8):971-987 1439 UI - 15060 AU - Nucamendi U AU - Sudarsky D AD - Univ Sussex, Ctr Theoret Phys, Brighton BN1 9QJ, E Sussex, EnglandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNucamendi, U, Univ Sussex, Ctr Theoret Phys, Brighton BN1 9QJ, E Sussex, England TI - Black holes with zero mass AB - We consider the spacetimes corresponding to static global monopoles with interior boundaries corresponding to a black hole horizon and analyse the behaviour of the appropriate ADM mass as a function of the horizon radius r(H). We find that for small enough rH, this mass is negative as in the case of the regular global monopoles, but that for large enough rH the mass becomes positive, encountering an intermediate value for which we have a black hole with zero ADM mass MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000089958000008 L2 - THEOREM; PROOF SO - Classical and Quantum Gravity 2000 ;17(19):4051-4058 1440 UI - 16603 AU - Nunez-Vazquez EJ AU - Yotsu-Yamashita M AU - Sierra-Beltran AP AU - Yasumoto T AU - Ochoa JL AD - Biol Res Ctr, La Paz 23000, BCS, MexicoTohoku Univ, Grad Sch Agr, Aoba Ku, Sendai, Miyagi 9818555, JapanOchoa, JL, Biol Res Ctr, Box 128, La Paz 23000, BCS, Mexico TI - Toxicities and distribution of tetrodotoxin in the tissues of puffer fish found in the coast of the Baja California Peninsula, Mexico AB - Toxicities and terrodotoxin distribution in tissues of five puffer fish species commonly found in the littoral of Baja California Peninsula, Mexico (Sphoeroides annulatus, S. lobatus, S. lispus, Arothron meleagris and Canthigaster punctatissima) were evaluated by bioassay and HPLC. The toxicities estimated as tetrodotoxin-equivalents of all species were more than 0.42 mu g/g in at least one of the tissues tested, and the highest was found in S, lispus liver (130 mu g/g). (C) 1999 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000084826500012 L2 - AROTHRON-NIGROPUNCTATUS; DERIVATIVES; SAXITOXIN SO - Toxicon 2000 ;38(5):729-734 1441 UI - 14881 AU - Nunez R AU - Miller B AU - Lindzey F AD - Denver Zool Fdn, Denver, CO 80205, USAFdn Ecol Cuixmala, Melaque 48980, Jalisco, MexicoUniv Wyoming, USGS, Wyoming Cooperat Fish & Wildlife Res Unit, Laramie, WY, USAMiller, B, Denver Zool Fdn, 2300 Steele St, Denver, CO 80205, USA TI - Food habits of jaguars and pumas in Jalisco, Mexico AB - Jaguars (Panthera onca) and pumas (Puma concolor) are sympatric over much of their geographic range in Mexico and South and Central America. We investigated diets of these fields in and around the Chamela-Cuixmala Biosphere Reserve in western Jalisco, Mexico. Diets were determined from seat analyses and documentation of prey cadavers. Relative biomass of each prey species consumed by pumas and jaguars was estimated from analysing 65 puma and 50 jaguar seats collected from 1995 to 1998. Both jaguars and pumas fed mainly on mammals, with white-tailed deer (Odocoileus virginianus) dominating the biomass of the diet of each species (54% and 66% respectively). There was a high degree of overlap between jaguar and puma diets, but pumas had a broader food niche than jaguars, and their ability to exploit smaller prey may give them an advantage over jaguars when faced with human-induced habitat changes MH - Mexico|Jalisco MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 16 U4 - Zoology U5 - J;Article AV - English IS - 0952-8369 UR - ISI:000165318600011 L2 - Panthera onca;Puma concolor;diet;scat analysis;habitat;Mexico;PANTHERA-ONCA; TROPICAL FORESTS; PREY; CONSERVATION; PATTERNS; ECOLOGY; AMERICA; LEOPARD; REGION; BELIZE SO - Journal of Zoology 2000 ;252():373-379 1442 UI - 16624 AU - Nurko S AU - Garcia-Aranda JA AU - Worona LB AU - Zlochisty O AD - Childrens Hosp, Combined Program Gastroenterol & Nutr, Boston, MA 02115, USAHosp Infantil Mexico Federico Gomez, Dept Gastroenterol & Nutr, Mexico City, DF, MexicoNurko, S, Childrens Hosp, Combined Program Gastroenterol & Nutr, 300 Longwood Ave, Boston, MA 02115 USA TI - Cisapride for the treatment of constipation in children: A double-blind study AB - Objective: To determine whether cisapride is effective in the treatment of children with constipation. Study design: Double-blind placebo-controlled study in which children with chronic constipation were randomly assigned to treatment with cisapride or placebo for 12 weeks. Results: Forty children were enrolled, and 36 completed the therapy. Treatment successes occurred in 13 of 17 (76%) subjects in the cisapride group and 8 of 19 (37%) subjects in the placebo group (P < .03). The odds ratio for response after cisapride administration was 8.2 times higher (95% CI 1.3 to 49.4). During cisapride therapy, there was a significant improvement in number of spontaneous bowel movements per week (from 0.9 +/- 0.1 to 4.1 +/- 1.1), and there was a significant decrease in number of fecal soiling episodes per day (1.8 +/- 0.5 to 0.08 +/- 0.4), percent with encopresis (82% vs 23%), number of laxative doses per week (from 10.3 +/- 2.6 to 0.8 +/- 0.6), percent using laxatives (77% to 24%), and total gastrointestinal transit time (from 115.0 +/- 3.7 hours to 77.0 +/- 11.1 hours). With placebo, there were no significant changes in the number of spontaneous bowel movements (from 1.0 +/- 0.8 to 2.2 +/- 0.6), percent with encopresis (74% vs 47%), or total gastrointestinal transit time (from 112.5 +/- 4.9 hours to 95.4 +/- 9.8 hours); but there was a significant decrease in number of fecal soiling episodes per day (from 1.3 +/- 0.4 to 0.4 +/- 0.2) and number of laxative doses used per week (from 11.5 +/- 2.9 to 2.05 +/- 0.7). The final number of spontaneous bowel movements, fecal soiling episodes, laxatives used, or percent patients with encopresis was not different when patients receiving cisapride were compared with those receiving placebo. Conclusion: Cisapride was effective in the treatment of children with constipation. (J Pediatr 2000;136:35-40) MH - USA MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY-YEAR BOOK INC RP - NOT IN FILE U3 - TC 14 U4 - Pediatrics U5 - J;Article AV - English IS - 0022-3476 UR - ISI:000084910000011 L2 - GASTROINTESTINAL MOTILITY DISORDERS; INTRACTABLE CONSTIPATION; TRANSIT-TIME; CHILDHOOD; DEFECATION; ENCOPRESIS; TRIAL SO - Journal of Pediatrics 2000 ;136(1):35-40 1443 UI - 16339 AU - O'Connor JA AU - Redman MP AU - Holloway AJ AU - Bryce M AU - Lopez JA AU - Meaburn J AD - Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoO'Connor, JA, Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England TI - The hypersonic, bipolar, knotty outflow from the engraved hourglass planetary nebula MyCn 18 AB - The remarkable velocity structure of the different components of the young planetary nebula MyCn 18 have been revealed by obtaining imagery and spatially resolved spectrometry of the H alpha and [N II] lambda lambda 6548, 6584 lines with the Manchester echelle spectrometer combined with the 3.9 m Anglo-Australian telescope. The bright, bipolar, nebular core is shown to be composed of two extended hemispherical cavities whose axes are tilted at 52 degrees to the plane of the sky. Ionized flows, at less than or equal to 90 km s(-1) and parallel to the walls of these cavities, are occurring. The full extent of the elongated bipolar assembly of highspeed knots which apparently lie along the same axis is now revealed in a continuum-subtracted image in the light of the H alpha and [N II] lambda lambda 6548, 6584 nebular emission lines. Complete spatial coverage of line profiles from these knots is also presented for the first time. In their most likely configuration, these knots are shown to have a range of outflowing speeds of less than or equal to 630 km s(-1) that are proportional to their distance from the central star. There is some degree of point/velocity symmetry, indicating that some pairs of knots have been ejected in opposing directions at the same speed. Curiously, the line profiles from the knots are very narrow, i.e., from 15 to 30 km s(-1). Among several possible explanations of the origin of these hypersonic knots is a recurrent nova-like ejection from a central binary star MH - United Kingdom MH - Mexico|Baja California PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086105700024 L2 - ISM : kinematics and dynamics;planetary nebulae : individual (MyCn 18);ECHELLE OBSERVATIONS; EPISODIC JET; EVOLUTION; FLEMING-1; NOVAE SO - Astrophysical Journal 2000 ;531(1):336-344 1444 UI - 15648 AU - O'Dell CR AU - Henney WJ AU - Burkert A AD - Rice Univ, Dept Space Phys & Astron, Houston, TX 77251, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoMax Planck Inst Astron, D-69117 Heidelberg, GermanyO'Dell, CR, Rice Univ, Dept Space Phys & Astron, MS-108, Houston, TX 77251 USA TI - The surprising emission distribution within the Helix Nebula cometary knots AB - We compare the morphology of the cometary knots in the Helix Nebula in different emission lines using Hubble Space Telescope Wide Field Planetary Camera 2 and Space Telescope Imaging Spectrograph observations. We find that the [N II] 6658 Angstrom line emission from the cometary heads is displaced with respect to H alpha, peaking at a position that is closer to the central ionizing star. This result seems at first sight to be in conflict with simple photoionization models, which predict that the [N II] emission is closer to the ionization front OF) because it is confined to a thin H+-He-0 layer, a prediction confirmed by calculations with both our own and the CLOUDY programs. However, the ratio of [N II] to H alpha is very temperature sensitive, and the observations can be explained if the knots are modeled as photoevaporating globules. In this case, there is a strong temperature gradient across the IF, resulting in the [N II] emission being depressed in the partially neutral zones. We also find a strong correlation between the strength of the [N II] and [O III] emission in individual knots, with both being higher in the knots that are closer to the central star. On the current evidence, it is unclear whether this is due to inter-knot variations in metal abundances or in gas temperature MH - USA MH - Germany MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000088231100028 L2 - planetary nebulae : individual (NGC 7293);ORION NEBULA; INTERSTELLAR CLOUDS; PLANETARY-NEBULAE; PHOTOEVAPORATION; PROPLYDS; DISKS; CLUMPS SO - Astronomical Journal 2000 ;119(6):2910-2918 1445 UI - 15999 AU - O'Toole CMB AU - Arnoult C AU - Darszon A AU - Steinhardt RA AU - Florman HM AD - Univ Massachusetts, Sch Med, Dept Cell Biol, Worcester, MA 01655, USACtr Etud Grenoble, Dept Biol Mol & Struct, F-38054 Grenoble, FranceInst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62210, Morelos, MexicoUniv Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720, USAFlorman, HM, Univ Massachusetts, Sch Med, Dept Cell Biol, Worcester, MA 01655 USA TI - Ca2+ entry through store-operated channels in mouse sperm is initiated by egg ZP3 and drives the acrosome reaction AB - Fertilization occurs after the completion of the sperm acrosome reaction, a secretory event that is triggered during gamete adhesion. ZP3, an egg zona pellucida glycoprotein, produces a sustained increase of the internal Ca2+ concentration in mouse sperm, leading to acrosome reactions. Here rye show that the sustained Ca2+ concentration increase is due to the persistent activation of a Ca2+. influx mechanism during the late stages of ZP3 signal transduction. These cells also possess a Ca2+ store depletion-activated Ca2+ entry pathway that is open after treatment with thapsigargin. Thapsigargin and ZP3 activate the same Ca2+ permeation mechanism, as demonstrated by fluorescence quenching experiments and by channel antagonists. These studies show that ZP3 generates a sustained Ca2+ influx through a store depletion-operated pathway and that this drives the exocytotic acrosome reaction MH - USA MH - France MH - Mexico|Morelos PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 106 U4 - Cell Biology U5 - J;Article AV - English IS - 1059-1524 UR - ISI:000087049700007 L2 - CAPACITATIVE CALCIUM-ENTRY; SEA-URCHIN SPERM; ZONA-PELLUCIDA; SPERMATOGENIC CELLS; INTRACELLULAR CA2+; MAMMALIAN SPERM; TYROSINE PHOSPHORYLATION; PERTUSSIS TOXIN; XENOPUS OOCYTES; EXOCYTOSIS SO - Molecular Biology of the Cell 2000 ;11(5):1571-1584 1446 UI - 15862 AU - Obrador GT AU - Pereira BJG AD - New England Med Ctr, Div Nephrol, Boston, MA 02111, USAPanamer Univ, Sch Med, Mexico City, DF, MexicoPereira, BJG, New England Med Ctr, Div Nephrol, Box 391,750 Washington St, Boston, MA 02111 USA TI - Initiation of dialysis: Current trends and the case for timely initiation MH - USA MH - Mexico|Distrito Federal PB - TORONTO: MULTIMED INC RP - NOT IN FILE U3 - TC 4 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0896-8608 UR - ISI:000087498600027 L2 - initiation;glomerular filtration rate;serum creatinine;trends;CHRONIC-RENAL-FAILURE; DIETARY-PROTEIN RESTRICTION; HEMODIALYSIS-PATIENTS; PERITONEAL-DIALYSIS; METABOLIC-ACIDOSIS; SERUM CREATININE; UNITED-STATES; DISEASE; NUTRITION; MORTALITY SO - Peritoneal Dialysis International 2000 ;20():S142-S149 1447 UI - 14876 AU - Occelli ML AU - Bertrand JA AU - Gould SAC AU - Dominguez JM AD - MLO Consultants, Atlanta, GA 30328, USAGeorgia Inst Technol, Dept Chem & Biochem, Atlanta, GA 30332, USAClaremont Coll, WM Keck Sci Ctr, Claremont, CA 91711, USAInst Mexicano Petr, Mexico City 07730 14, DF, MexicoOccelli, ML, MLO Consultants, 6105 Black Water Trail, Atlanta, GA 30328 USA TI - Physicochemical characterization of a Texas montmorillonite pillared with polyoxocations of aluminum. Part I: the microporous structure (vol 34, pg 195, 2000) MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Correction AV - English IS - 1387-1811 UR - ISI:000165320200033 SO - Microporous and Mesoporous Materials 2000 ;40(1-3):351-351 1448 UI - 16496 AU - Occelli ML AU - Bertrand JA AU - Gould SAC AU - Dominguez JM AD - MLO Consultants, Atlanta, GA 30328, USAGeorgia Inst Technol, Dept Chem & Biochem, Atlanta, GA 30332, USAClaremont Mckenna Coll, WM Keck Sci Ctr, Claremont, CA 91711, USAInst Mexicano Petr, Mexico City 07730 14, DF, MexicoOccelli, ML, MLO Consultants, 6105 Black Water Tr, Atlanta, GA 30328 USA TI - Physicochemical characterization of a Texas montmorillonite pillared with polyoxocations of aluminum Part I: the microporous structure AB - Atomic force microscopy (AFM), nitrogen and argon porosimetry, high resolution electron microscopy (HREM) together with powder X-ray diffraction (XRD) have been used to characterize a heat stable pillared interlayered clay (PILC). The clay catalyst was prepared by replacing the charge compensating cations in a Texas Na-montmorillonite with [Al13O4(OH)(24)(H2O)(12)](7+) (Al-13) ions from an aluminum chlorhydroxide (ACH) solution using an ACH/clay and water/clay (wt/wt) ratio of 1.0 and 100, respectively. The reaction product was extensively washed with deionized water to ensure a complete hydrolysis of the interlamellar Al species and formation of stable Keggin ions. Molecular scale AFM images have shown the absence of adsorbed surface Al species indicating that, at the synthesis conditions used, the added Keggin ions are located in the clay interlamellar space where they are believed to hydrogen bond with basal oxygens. Model calculations have been used to estimate its dimensions to be 0.97 nm x (0.89 nm x 1.09 nm). After heating in air at 500 degrees C, the Keggin ions lose their water ligands forming shorter Al,, blocks 0.84 nm in height that become the structure supporting pillars. Thermal and hydrothermal treatments can transform ACH powders into gamma-alumina: a transition phase having a spinel-like structure, as identified by XRD. However gamma-alumina formation could not be observed by XRD in similarly treated Al-13-PILCs. Pore size distribution data from nitrogen and argon porosimetry experiments have indicated that the Al-13-PILC under study is essentially a microporous material with a pore volume (PV) in the 0.10-0.12 cm(3) g(-1) range and with a Langmuir surface area (SA) of 300-320 m(2) g(-1), well in agreement with SA values measured from density functional theory methods based on cylindrical-like pore geometry. Discrepancies between calculated and measured SA and PV values have been attributed mainly to the incomplete expansion of all the Na-montmorillonite platelets, as observed in HREM images. Moreover, AFM and HREM images have shown that steam aging for 5 h at 760 degrees C with 100% steam decomposes the clay aluminosilicate layers, thus providing evidence that during this hydrothermal treatment the Al-13-PILC structure will collapse irrespective of the stability of its Al-13 pillars. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 28 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000085340900006 L2 - Keggin ions;pillared clays;pore volumes;surface areas;thermal stability;ATOMIC-FORCE MICROSCOPE; CLAY CATALYSTS; SURFACE-AREA SO - Microporous and Mesoporous Materials 2000 ;34(2):195-206 1449 UI - 15071 AU - Ochoa HOG AU - guilera-Granja F AU - Pierron-Bohnes V AU - Cadeville MC AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoECPM, ULP, UM0046 CNRS, Inst Phys & Chim Mat Strasbourg,Grp Etud Mat Met, F-67037 Strasbourg, FranceOchoa, HOG, Univ Autonoma San Luis Potosi, Inst Fis, Alvaro Obregon 64, San Luis Potosi 78000, SLP, Mexico TI - Chemical and magnetic phase diagrams of AB(3) and A(3)B anisotropic thin films AB - We present a double Ising model treated in the Bragg-Williams approximation with aim to describe the composition modulations and the magnetic properties of MBE codeposited fee (111) oriented alloy thin films. First the chemical and magnetic phase diagrams of isotropic AB(3) and A(3)B fee; structures with A the magnetic component are calculated. Then the effect of anisotropic chemical interactions that are different in the basic (111) planes and between these planes is investigated. It yields the formation of a superlattice-like system analogous to those experimentally observed in some Go-based alloy films. On the B-rich side, the magnetic phase diagrams are strongly modified with respect to the isotropic case. Comparison is made with experimental data MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000089733800083 L2 - GROWTH DIRECTION; ALLOY-FILMS; SURFACE; ORDER SO - Physical Review B 2000 ;62(13):9015-9020 1450 UI - 16497 AU - Oh SJ AU - Cook DC AU - Carpio JJ AD - Old Dominion Univ, Dept Phys, Norfolk, VA 23529, USAAutonomous Univ Campeche, Programa Corros Golfo Mexico, Campeche, MexicoOh, SJ, Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea TI - Characterization of the corrosion products formed on carbon steel in a marine environment AB - The corrosion products formed on steels exposed in Campeche, Mexico, were analyzed using Mossbauer spectroscopy, Micro-Raman spectrometry, and x-ray diffraction as functions of the environmental conditions and exposure times. The corrosion products were generally composed of two layers; the layer closer to steel substrate mainly consisted of goethite, and the other layer near the surface of the corrosion products was mainly composed of lepidocrocite which was the dominant oxide formed at inland. Akaganeite, the dominant oxide at the shoreline, was randomly found in the corrosion products. It is a belief that the larger fraction of akaganeite was caused by the higher concentration of chloride at the shoreline. Much thicker corrosion products formed on the coupon surface exposed at the shoreline due to the high corrosion rate, possibly caused by the high content of chloride in the air MH - Mexico|Campeche MH - South Korea MH - USA PB - SEOUL: KOREAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0374-4884 UR - ISI:000085337000008 SO - Journal of the Korean Physical Society 2000 ;36(2):106-110 1451 UI - 15769 AU - Ohlsson JL AU - Villarreal G AU - Cavazos H AU - Abrahamsson M AU - Trevino E AU - Sjostrom A AU - Sjostrand J AD - Dept Clin Neurosci, Vis Res Unit, Gothenburg, SwedenUANL, Dep Oftalmol, Monterrey, Mexico TI - Screening merit of the Lang II, Frisby, Randot, Titmus and TNO stereotests MH - Mexico|Nuevo Leon MH - Sweden PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246703823 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S705-S705 1452 UI - 16148 AU - Ojeda-Lopez MA AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoOjeda-Lopez, MA, Univ Calif Santa Barbara, Dept Mat, MRL Bldg,Room 2232, Santa Barbara, CA 93106 USA TI - Noncollinear magnetic order in antiferromagnetic and weak-ferromagnetic transition-metal clusters AB - The magnetic properties of transition-metal clusters having N less than or equal to 19 atoms are determined using a d-band model Hamiltonian within the unrestricted Hartree-Fock approximation, which allows noncollinear magnetic arrangements of the local magnetic moments <(mu)over right arrow>(l) at different cluster atoms l. Results are given for <(mu)over right arrow>(l) and for the average magnetic moment per atom mu(N) = (1/N)\Sigma l<(mu)over right arrow>(l) as a function of d-band filling, nd, and J/W (J refers to the d-electron effective exchange integral and W to the d-band width). It is shown that compact clusters near half-band filling present antiferromagnetic-like noncollinear magnetic arrangements, which attempt to minimize antiferromagnetic frustration in nonbipartite structures. The resulting mu(N), are very small, in agreement with experiments in CTN clusters (typically mu(N), less than or equal to 0-5 mu(B) for N 19) For n(d) = 6.5-7 as a function of J/W, the clusters undergo a transition from antiferromagnetic- to ferromagnetic-like orders. Thereby a novel physical picture for the onset of ferromagnetism is discussed. Comparison is made with the available noncollinear ab initio results. (C) 2000 Published by Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000086537300001 L2 - magnetically ordered materials;nanostructures;electron-electron interactions;SMALL VANADIUM CLUSTERS; SMALL IRON CLUSTERS; ELECTRONIC-STRUCTURE SO - Solid State Communications 2000 ;114(6):301-304 1453 UI - 15442 AU - Olguin D AU - Cantarero A AU - Cardona M AD - Max Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyUniv Valencia, Inst Ciencia Mat, E-46100 Burjassot, SpainOlguin, D, IPN, CINVESTAV, Dept Fis, Mexico City 07738, DF, Mexico TI - Temperature and isotopic mass dependence of the direct band gap in semiconductors: LCAO calculations AB - Using perturbation theory, within a tight-binding (LCAO) approach, we have calculated the effects of electron-phonon interaction on the lowest direct band gap of Ge, GaAs and ZnSe. The agreement of the calculated temperature coefficient with experimental data is satisfactory. Following our approach, we have also calculated the dependence of the direct band gap on isotopic mass. The results are in close agreement with the experimental data MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800007 L2 - LATTICE-DYNAMICS; FUNDAMENTAL GAP; COPPER HALIDES; ENERGY-GAP; GE; CUCL; ZNSE; SI SO - Physica Status Solidi B-Basic Research 2000 ;220(1):33-39 1454 UI - 16312 AU - Olivas A AU - Avalos M AU - Fuentes S AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoInst Mexicano Petr Gerencia Catalisis, Mexico City, DF, MexicoOlivas, A, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Evolution of crystalline phases in nickel-tungsten sulfide catalysts AB - Unsupported Ni-W sulfide catalysts were prepared employing ammonium thiotungstate complexes and nickel nitrate as metal-sulfide precursors. Structural characterization was carried out by XRD and HRTEM measurements. XRD patterns show crystallinity enhancement of WS, particles as the W content in the mixed catalysts was decreased. HRTEM demonstrates that WS2 layers start to coat NiS particles when the amount of Ni was increased. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000086005100001 L2 - nickel-tungsten sulfide;catalysts;WS2;impregnated thiosalt;crystalline phases;Ni3S2;NiS-millerite;Ni9S8;HYDRODESULFURIZATION CATALYSTS; AMMONIUM TETRATHIOMOLYBDATE; MOLYBDENUM; HYDROGENATION; PROMOTER SO - Materials Letters 2000 ;43(1-2):1-5 1455 UI - 15270 AU - Oliver JM AU - Kepley CL AU - Ortega E AU - Wilson BS AD - Univ New Mexico, Sch Med, Dept Pathol, Albuquerque, NM 87131, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoOliver, JM, Univ New Mexico, Sch Med, Dept Pathol, Albuquerque, NM 87131 USA TI - Immunologically mediated signaling in basophils and mast cells: finding therapeutic targets for allergic diseases in the human Fc epsilon R1 signaling pathway AB - The high affinity IgE receptor, Fc epsilon RI, plays key roles in an array of acute and chronic human allergic reactions including asthma, allergic rhinitis, atopic dermatitis, urticaria and anaphylaxis. In humans and rodents, this receptor is found at high levels on basophils and mast cells where its activation by IgE and multivalent antigen produces mediators and cytokines responsible for Fc epsilon RI-dependent acute inflammation. Mast cells can additionally contribute to sustained inflammatory responses by internalizing antigen bound to IgE-Fc epsilon RI complexes for processing to peptides and presentation to T cells. In humans, the Fc epsilon RI is also expressed, at lower density, on monocytes, macrophages and dendritic cells (DC) where its likely functions again include both signaling to mediator and cytokine production and antigen presentation. Our laboratories have focused on defining the earliest steps in the Fc epsilon RI signaling cascade in basophils and mast cells and on developing new routes to control allergic inflammation based on inhibiting these events. Here, we describe novel strategies to limit antigen-stimulated Fc epsilon RI signaling by: (1) sequestering the Fc epsilon R1-associated protein-tyrosine kinase, Lyn, that initiates Fc epsilon RI signaling; (2) eliminating; or (3) inactivating the protein-tyrosine kinase, Syk, that propagates Fc epsilon RI signaling; and (4) establishing inhibitory crosstall between Fc epsilon RI and a co-expressed receptor, Fc gamma RZI, that again limits Fc epsilon RI-mediated Syk activation. These strategies may form the basis for new therapies for allergic inflammation. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 29 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0162-3109 UR - ISI:000089287600011 L2 - basophil;mast cell;IgE;Fc epsilon RI;IgG;Fc gamma RII;allergy;inflammation;asthma;tyrosine kinase;Lyn;Syk;antigen-presenting cells;ITAM;ITIM;anti-IgE;secretion;degranulation;cytokine production;piceatannol;immunotherapy;FC-EPSILON-RI; ANTIGEN-PRESENTING CELLS; TYROSINE PHOSPHORYLATION; IGE RECEPTORS; RELEASE; SYK; SURFACE; LYN; IDENTIFICATION; DEGRANULATION SO - Immunopharmacology 2000 ;48(3):269-281 1456 UI - 16313 AU - Olmos J AU - Paniagua J AU - Contreras R AD - Ctr Invest Cient & Educ Super Ensenada, Mol Microbiol Lab, Marine Biotechnol Area, Ensenada, Baja California, MexicoOlmos, J, Dept Acuicultura, POB 434844, San Diego, CA 92143, USA TI - Molecular identification of Dunaliella sp utilizing the 18S rDNA gene AB - The utilization of micro-algae for the production of food and fine chemicals is growing in importance. However, confusion of names and species makes comparison of results by different authors very difficult. in this work, five species of Dunaliella were characterized using their 18S ribosomal RNA genes. Conserved oligonucleotides complementary to 5' and 3' termini of the 18S rDNAs were designed and utilized to amplify theme, restriction fragment length polymorphism analysis of the polymerase chain reaction products was developed. Species-specific primers were also designed and utilized to corroborate the identification MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0266-8254 UR - ISI:000085970400017 L2 - CULTURE; ALGAE SO - Letters in Applied Microbiology 2000 ;30(1):80-84 1457 UI - 14395 AU - Oloriz F AU - Villasenor AB AU - Gonzalez-Arreola C AD - Univ Granada, Fac Ciencias, Dept Estratig & Paleontol, Granada 18002, SpainUniv Nacl Autonoma Mexico, Inst Geol, Dept Paleontol, Mexico City 04510, DF, MexicoOloriz, F, Univ Granada, Fac Ciencias, Dept Estratig & Paleontol, Av Fuentenueva S-N, Granada 18002, Spain TI - Geographic control on phenotype expression. The case of Hybonoticeras mundulum (Oppel) from the Mexican Altiplano AB - Hybonoticeras mundulum (Oppel) (m) s.s. is reported from the Mexican Altiplano on the basis of material collected bed-by-bed in sections in the States of Durango and Zacatecas. The known range of this species in the Mexican Altiplano is interpreted to be uppermost Kimmeridgian (upper to uppermost Beckeri Zone) to lowermost Tithonian (basal to lower Hybonotum Zone). The Mexican specimens studied are the most complete and valuable collection of H. mundulum (Oppel) s.s. known from a given area, and reveal that Mexican populations show phenotypic features different from European ones. Vicariant events accord with data available about the areal and biostratigraphic distribution of this species, as well as with the combination of allocyclic and autocyclic factors influencing Mexican seas, the breaking of populations rather than colonization events, and the impoverished ammonite assemblages showing endemic traits within the stratigraphic interval studied MH - Mexico|Distrito Federal MH - Spain PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 4 U4 - Paleontology U5 - J;Review AV - English IS - 0024-1164 UR - ISI:000166704600003 L2 - Ammonitina;Hybonoticeras;Mexico;palaeobiogeography;Upper Jurassic;GENUS HYBONOTICERAS; STRATIGRAPHY; AMMONITES; DISPERSAL; TECTONICS; EXAMPLES; IBERIA; NORTH; FAUNA; SOUTH SO - Lethaia 2000 ;33(3):157-174 1458 UI - 15892 AU - Olvera O AU - Arceo C AU - Zimmering S AD - Brown Univ, Div Biol & Med, Program Biol, Providence, RI 02912, USAInst Nacl Invest Nucl, Dept Genet, Edo De Mexico, Salazar, MexicoZimmering, S, Brown Univ, Div Biol & Med, Program Biol, Box G, Providence, RI 02912 USA TI - Chlorophyllin [CHLN] and the mutagenicity of monofunctional alkylating agents in Drosophila: the action of CHLN need not include an influence on metabolic activation AB - The effect of chlorophyllin (CHLN) on the mutagenicity of four monofunctional alkylating agents (MFAAs) was evaluated in the wing spot test in Drosophila. Three of the compounds are direct-acting (ethylnitrosamine (ENU), methylnitrosourea (MNU), and methylmethanesulfonate (MMS)) and one indirect-acting (diethylnitrosamine, DEN). Results indicate that the mutagenicity of all four compounds is strongly inhibited by CHLN. The findings are not in agreement with the conclusion of Romert et al. (1992) that CHLN has no effect on the mutagenicity of direct acting MFFAs inferred from their work with MNU and ethylmethanesulfonate (EMS) in the V79 and Salmonella in vitro test systems. The results suggest the possibility that the action of CHLN need not include an inhibiting effect on metabolic activation. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000087476300002 L2 - monofunctional alkylating agents;direct and indirect acting;chlorophyllin;inhibition;somatic cells;Drosophila SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2000 ;467(2):113-117 1459 UI - 16152 AU - Ondarza-Rovira R AU - Boyd TJM AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Essex, Dept Phys, Colchester CO4 3SQ, Essex, EnglandOndarza-Rovira, R, Inst Nacl Invest Nucl, AP 18-1027, Mexico City 11801, DF, Mexico TI - Plasma harmonic emission from laser interactions with dense plasma AB - A nonlinear procedure is used to account for the mechanism of laser harmonic generation to high orders and plasma emission in laser-dense plasma interactions. A Lagrangian model is used to describe harmonic generation in terms of the oscillatory behavior of an electron plasma. It is shown that the effect of pulse shaping constitutes an important issue for the generation and enhancement of harmonics. It is found that in the presence of electron density perturbations further harmonics beyond the order that corresponds to the upper shelf plasma density can be excited. Computations were performed for mildly relativistic electrodynamics and time scales where wave breaking effects do not take place. Using particle-in-cell (PIC) simulations, plasma emission was observed for the interaction of laser light with super-critical density plasmas with spectral characteristics resembling those found from the fluid model. (C) 2000 American Institute of Physics. [S1070-664X(00)01205-2] MH - United Kingdom MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-664X UR - ISI:000086510800024 L2 - FEMTOSECOND LASER; OVERDENSE PLASMA; GENERATION; ABSORPTION; INTENSITY; PULSES SO - Physics of Plasmas 2000 ;7(5):1520-1530 1460 UI - 15574 AU - Ordaz AA AU - Rocha JM AU - Aguilar FJA AU - Granados SG AU - Bedioui F AD - Ecole Natl Super Chim Paris, Lab Electrochim & Chim Analyt, CNRS, UMR 7575, F-75231 Paris 05, FranceUniv Guanajuato, Inst Invest Cientificas, Guanajuato 36040, MexicoBedioui, F, Ecole Natl Super Chim Paris, Lab Electrochim & Chim Analyt, CNRS, UMR 7575, 11 Rue Pierre & Marie Curie, F-75231 Paris 05, France TI - Electrocatalysis of the reduction of organic halide derivatives at modified electrodes coated by cobalt and iron macrocyclic complex-based films: application to the electrochemical determination of pollutants AB - In this study, we go into the examination of the possible use of chemically modified electrodes by Hernin embedded in surfactant film of didodecyldimethylalamonium bromide or by electropolymerized cobalt porphyrin and Salen films, as potential materials for the effective electrochemical detection of several organic halides (trichloroacetic acid, ethylene dibromide, tetrachloroethylene, trichloroethylene, dichloroacetic acid, 2,4,6-trichlorophenol, 2,4-dichlorophenoxy acetic acid, methoxychloride, etc.), in aqueous and organic solutions. The reported results show an important catalytic effect induced by the modification of the electrode surface by the metal complexes which is materialized by 1.0 V decrease in the reduction potential of the examined organic halide derivatives and a large increase in their reduction current (2 to 500 times). Our descriptive results of the electrocatalytic behaviour of the examined electrodes constitute a first important step in the investigation of the evaluation of a strategy materializing the use of these modified electrodes for the detection of various significant organohalide derivatives MH - France MH - Mexico|Guanajuato PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0365-4877 UR - ISI:000088513900010 L2 - electrocatalysis;modified electrodes;detection;pollutants;complexes;organohalides;PORPHYRIN-MODIFIED ELECTRODES; ALKYL-HALIDES; ORGANOHALIDE POLLUTANTS; CATALYTIC REDUCTION; POLYMER SO - Analusis 2000 ;28(3):238-244 1461 UI - 15185 AU - Orgaz E AU - Gupta M AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoUniv Paris 11, CNRS, LEMHE, F-91405 Orsay, FranceOrgaz, E, Natl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Chemical bonding features of the ternary alkali metal platinum and palladium hydrides AB - Numerous ternary complex hydrides based on alkali and transition metals have been synthesized in recent years. These compounds show novel crystal structures and a variety of H coordinations around the transition metal, some of them unusual. The coexistence of ionic and covalent chemical bonds in such hydrides is also remarkable. In this article we have investigated, from first principles, the electronic structure of some palladium and platinum ternary hydrides. By means of the augmented plane wave method we have calculated the energy bands, density of states, and the partial wave and symmetry analysis of the density of states at each atomic site. Using these results we discuss the features of the electronic structure and chemical bonding in hydrides such as A(2)TH(4) (A = Na, K; T = Pd, Pt), which are found to be semiconductors. We discuss the trends in the electronic properties of palladium and platinum hydrides with linear, square planar, and octahedral H coordinations. (C) 2000 John Wiley & Sons, Inc MH - France MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000089460100009 L2 - transition metal hydrides;platinum;palladium;electronic structure;HIGH-PRESSURE SYNTHESIS; ELECTRONIC-STRUCTURE; INTERMETALLIC HYDRIDES; K2PTCL6 STRUCTURE; HYDROGEN COMPLEX; NA2PDH2; SR SO - International Journal of Quantum Chemistry 2000 ;80(2):141-152 1462 UI - 15059 AU - Orjuela M AU - Castaneda VP AU - Ridaura C AU - Lecona E AU - Leal C AU - Abramson DH AU - Orlow I AU - Gerald W AU - Cordon-Cardo C AD - Mem Sloan Kettering Canc Ctr, Dept Pathol, New York, NY 10021, USAColumbia Univ, Dept Pediat, New York, NY 10027, USAColumbia Univ, Sch Publ Hlth, New York, NY 10027, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoInst Nacl Pediat, Dept Pathol, Mexico City, DF, MexicoInst Nacl Pediat, Dept Social Work, Mexico City, DF, MexicoInst Nacl Pediat, Dept Pediat Oncol, Mexico City, DF, MexicoCornell Univ, Med Ctr, New York Presbyterian Hosp, Ophthalm Oncol Ctr, New York, NY 10021, USACordon-Cardo, C, Mem Sloan Kettering Canc Ctr, Dept Pathol, 1275 York Ave, New York, NY 10021 USA TI - Presence of human papilloma virus in tumor tissue from children with retinoblastoma: An alternative mechanism for tumor development AB - Epidemiological studies have shown that the use of barrier methods of contraception is associated with a decreased incidence of papilloma virus infection and reduced risk of having a child with retinoblastoma. Thirty-nine primary retinoblastomas were analyzed for the presence of papilloma virus sequences. Tumor tissue sections were also used to assess the expression of the retinoblastoma protein and proliferative index. Papilloma sequences were detected in 14 of 39 (36%) tumors. Tumors in which viral sequences were detected were associated with a lower proliferative index (68% versus 78%; P = 0.015). Children with tumors containing viral sequences had a lower risk of extraocular disease (odds ratio, 9.0; 95% confidence interval, 1.6-49; P = 0.008) and a lower birth weight (2.9 versus 3.5 kg; P = 0.030). Based on these data, it is our hypothesis that papilloma viruses may play a role in the development of sporadic retinoblastoma. Detection of papilloma virus sequences and retinoblastoma protein in certain primary lesions suggests an alternative mechanism of tumor development for sporadic retinoblastoma MH - Mexico|Distrito Federal MH - USA PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 23 U4 - Oncology U5 - J;Article AV - English IS - 1078-0432 UR - ISI:000089931600030 L2 - INVASIVE CERVICAL CARCINOMAS; RISK-FACTORS; HEREDITARY RETINOBLASTOMA; GERMLINE MUTATIONS; POOR-PROGNOSIS; GENE-PRODUCT; INFECTION; WOMEN; CANCER; DNA SO - Clinical Cancer Research 2000 ;6(10):4010-4016 1463 UI - 14432 AU - Orozco-Segovia A AU - Brechu-Franco AE AU - Zambrano-Polanco L AU - Osuna-Fernandez R AU - Laguna-Hernandez G AU - Sanchez-Coronado ME AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoDF Univ Cauca, Popayan, ColombiaOrozco-Segovia, A, Univ Nacl Autonoma Mexico, Inst Ecol, Apartado Postal 70-275, Mexico City 04510, DF, Mexico TI - Effects of maternal light environment on germination and morphological characteristics of Sicyos deppei seeds AB - The effect was studied of sunlight and far-red (FR) light during seed development. on seed quality and germination of Sicyos deppei G. Don. Seeds exposed to FR during development were lighter in colour and their weight. size and water content were significantly lower. Less than 10% of non-scarified freshly harvested seeds germinated. Scarified, freshly harvested seeds developed under sunlight had a partially negative photoblastic response: both red (R) and FR light inhibited germination. The highest and fastest germination occurred in darkness, probably due to the effect of the high photon flux densities on the phytochrome during seed development. Scarified seeds ripened under FR light, germinated well in FR light and in darkness, but R light inhibited germination. After 6 months of storage, the permeability of S. deppei seeds increased, the partially negative photoblastic response was lost and germination of scarified seeds increased. Specifically. in seeds developed under FR. germination in darkness was faster than for the other light treatments, but slow in darkness for seeds developed under sunlight. The physiological and morphological heteroblastic responses in S. deppei probably extend its seed germination and seedling recruitment periods MH - Colombia MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0043-1737 UR - ISI:000166524900002 L2 - germination;light quality;phytochrome;seed coat dormancy;seed heteroblastism;PHYTOCHROME-A; ARABIDOPSIS-THALIANA; DORMANCY; INDUCTION; FLUENCE; PHOTOINHIBITION; FAMILY; WATER SO - Weed Research 2000 ;40(6):495-506 1464 UI - 14893 AU - Orozco-Suarez S AU - Brunson KL AU - Feria-Velasco A AU - Ribak CE AD - Univ Calif Irvine, Dept Anat & Neurobiol, Irvine, CA 92697, USAIMSS, Natl Med Ctr, Res Unit Neurol Dis, Mexico City, DF, MexicoCONACYT, SEP, CIATEJ, Guadalajara, Jalisco, MexicoRibak, CE, Univ Calif Irvine, Dept Anat & Neurobiol, Irvine, CA 92697 USA TI - Increased expression of gamma-aminobutyric acid transporter-1 in the forebrain of infant rats with corticotropin-releasing hormone-induced seizures but not in those with hyperthermia-induced seizures AB - High affinity, gamma-aminobutyric acid (GABA) plasma membrane transporters (GATs) influence the availability of GABA, the main inhibitory neurotransmitter in the brain. Recent studies suggest a crucial role for GATs in maintaining levels of synaptic GABA in normal as well as abnormal (i.e., epileptic) adult brain. However, the role of GATs during development and specifically changes in their expression in response to developmental seizures are unknown. The present study examined GAT-1-immunolabeling in infant. rats with two types of developmental seizures, one induced by corticotropin-releasing hormone (CRH) lasting about 2 h and the other by hyperthermia (a model of febrile seizures) lasting only 20 min. The number of GAT-1-immunoreactive (ir) neurons was increased in several forebrain regions 24 h after induction of seizures by CRH as compared to the control group. Increased numbers of detectable GAT-1-ir cell bodies were found in the hippocampal formation including the dentate gyrus and CA1, and in the neocortex, piriform cortex and amygdala. In contrast, hyperthermia-induced seizures did not cause significant changes in the number of detectable GAT-1-ir somata. The increase in GAT-1-ir somata in the CRH model and not in the hyperthermia model may reflect the difference in the duration of seizures. The brain regions where this increase occurs correlate with the occurrence of argyrophyllic neurons in the CRH model. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0920-1211 UR - ISI:000165253400008 L2 - GABA transporter;corticotropin-releasing hormone;febrile seizures;infant rat;PLASMA-MEMBRANE TRANSPORTER; TEMPORAL-LOBE EPILEPSY; GABA TRANSPORTER; STATUS EPILEPTICUS; FEBRILE SEIZURES; HIPPOCAMPAL GABA; MESSENGER-RNAS; IN-VIVO; DEVELOPING BRAIN; CEREBRAL-CORTEX SO - Epilepsy Research 2000 ;42(2-3):141-157 1465 UI - 15602 AU - Orozco A AU - Linser P AU - Valverde R AD - UNAM, UAQ Juriquilla, Ctr Neurobiol, Queretaro 76001, Qro, MexicoUniv Florida, Whitney Lab, St Augustine, FL 32086, USAOrozco, A, UNAM, UAQ Juriquilla, Ctr Neurobiol, Apartado Postal 1-1141, Queretaro 76001, Qro, Mexico TI - Kinetic characterization of outer-ring deiodinase activity (ORD) in the liver, gill and retina of the killifish Fundulus heteroclitus AB - Conversion of T-4 to T-3 is the first step in TH action and deiodinases are the major determinants of TH tissue availability and disposal. We here report the kinetic characterization of the outer-ring deiodinating (ORD) enzymes in the liver, gill and retina of sea water-adapted killifish, by using both rT(3) and T-4 as substrates. In liver, by using rT(3), we detected a high K-m (84 nM) and a low K-m (1.3 nM) component with kinetic characteristics similar to mammalian deiodinases DI and DII, In contrast, T-4-ORD only generated a low K-m (0.5 nM) component. As judged by its V-max (920 fmol I-125/mg per h) this DII enzyme is very abundant, approximately five and 20 times higher than that found in trout liver and hypothyroid rat, respectively. Kinetic analysis in killifish gill showed only one enzymatic component, with a high rT(3) K-m (430 nM) and a relatively low V-max (4.3 pmol I-125/mg per h). Our results in killifish retina show the expression of a T-4-low K-m (0.6 nM) deiodinase with high cofactor requirements akin to the mammalian DII. The V-max value for this enzyme is 182 fmol I-125/mg per h, five times lower than the one found in killifish liver, but comparable to that in hypothyroid rat pituitary. The biochemical similarities between fish and mammalian deiodinases could reflect their high conservation during vertebrate evolution and thus their importance in the regulation of thyroid hormone action. (C) 2000 Elsevier Science Inc. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 0305-0491 UR - ISI:000088315400002 L2 - thyroid hormone metabolism;fish ORD-pathways;deiodination;THYROID-HORMONE DEIODINATION; RAINBOW-TROUT; ONCORHYNCHUS-MYKISS; TRIIODOTHYRONINE; KIDNEY; 5'-DEIODINASES; STIMULATION; THYROXINE; TISSUES; SYSTEMS SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2000 ;126(3):283-290 1466 UI - 13994 AU - Orozco H AU - Sifuentes-Osornio J AU - Chan C AU - Medina-Franco H AU - Vargas-Vorackova F AU - Prado E AU - Arch J AD - Inst Nacl Nutr Salvador Zubiran, Div Surg, Mexico City 14000, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoInst Nacl Nutr Salvador Zubiran, Clin Epidemiol Unit, Mexico City 14000, DF, MexicoMedina-Franco, H, Univ Alabama, 321 Kracke Bldg,1922 7th Ave S, Birmingham, AL 35294 USA TI - Comparison of ceftibuten vs. amoxicillin/clavulanic acid as antibiotic prophylaxis in cholecystectomy and/or biliary tract surgery AB - A randomized, comparative, prospective clinical trial was carried out at a tertiary care center to compare the efficacy of two antibiotic regimens in the prophylaxis of postoperative infection in patients undergoing biliary tract surgery. One hundred patients undergoing cholecystectomy or biliary tract exploration were randomly allocated to one of the following antibiotic regimens: the standard regimen of three doses of amoxicillin/clavulanic acid (1000/200 mg) given by intravenous infusion, or a single dose of ceftiluten (400 mg) given orally Patients were monitored during their sta) in the hospital and ol er a 2 neck period as outpatients. Fifty adult patients were included in each group. Mean age was 49 years, and ses distribution was 82 women and 18 men. The groups were comparable in terms of demographic characteristics and comorbidity. There were no cases of postoperative infection in tile ceftibuten group, but five cases of infection occurred in the amoxicillin/clavulanic acid group (P <0.05). No adverse effects were observed with either antibiotic. The treatment cost per patient was significantly lon;er for ceftibuten. The results indicate that ceftibuten is well tolerated and more effective than amoxicillin/clavulanic acid for prophylaxis following gallbladder and biliary tract surgery. In addition, ceftibuten has the advantage of being more cost-effective and easier to administer than amoxicillin/clavulanic acid so it could be considered as an alternative for antibiotic prophylaxis in these types of surgical procedures MH - USA MH - Mexico|Distrito Federal PB - ST LOUIS: QUALITY MEDICAL PUBLISHING INC RP - NOT IN FILE U3 - TC 2 U4 - Gastroenterology & Hepatology;Surgery U5 - J;Article AV - English IS - 1091-255X UR - ISI:000167919700008 L2 - ceftibuten;prophylaxis;biliary surgery;cephalosporins;ORAL CEPHALOSPORINS; INTRAVENOUS CEFUROXIME; PHARMACOKINETICS; MULTICENTER; CIPROFLOXACIN; TRIAL SO - Journal of Gastrointestinal Surgery 2000 ;4(6):606-610 1467 UI - 14795 AU - Orozco L AU - Atkinson T AU - Macias M AU - Garcia F AU - Ridaura C AU - Dean M AD - Inst Nacl Pediat, Dept Human Genet, Mexico City, DF, MexicoInst Nacl Pediat, Dept Pathol, Mexico City, DF, MexicoNCI, Frederick Canc Res & Dev Ctr, Lab Genom Divers, Frederick, MD, USAIPN, CICATA, Interinst Program Mol Biomed, Mexico City, DF, Mexico TI - Loss of heterozygosity and RB1 mutations associated with retinoblastoma in Mexican patients MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400700487 SO - American Journal of Human Genetics 2000 ;67(4):100-100 1468 UI - 16116 AU - Orozco L AU - Velazquez R AU - Zielenski J AU - Tsui LC AU - Chavez M AU - Lezana JL AU - Saldana Y AU - Hernandez E AU - Carnevale A AD - Inst Nacl Pediat, Mol Biol Lab, Dept Res Human Genet, Mexico City 04530, DF, MexicoIPN, CICATA, Interinst Program Mol Biomed, Mexico City, DF, MexicoHosp Sick Children, Dept Genet & Genome Biol, Toronto, ON M5G 1X8, CanadaAsociac Mexicana Fibrosis Quist, Mexico City, DF, MexicoOrozco, L, Inst Nacl Pediat, Mol Biol Lab, Dept Res Human Genet, Insurgentes Sur 3700-C,Col Insurgentes Cuicuilco, Mexico City 04530, DF, Mexico TI - Spectrum of CFTR mutations in Mexican cystic fibrosis patients: identification of five novel mutations [W1098C, 846delT, P750L, 4160insGGGG and 297-1G -> A) AB - We have analyzed 97 CF unrelated Mexican families for mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Our initial screening for 12 selected CFTR mutations led to mutation detection in 56.66% of the tested chromosomes. In patients with at least one unknown mutation after preliminary screening, an extensive analysis of the CFTR gene by single stranded conformation polymorphism (SSCP)or by multiplex heteroduplex (mHET) analysis was performed. A total of 34 different mutations representing 74.58% of the CF chromosomes were identified. including five novel CFTR mutations: W1098C, P750L, 846delT, 4160insGGGG and 297-1G-->A. The level of detection of the CF mutations in Mexico is still lower than that observed in other populations with a relatively low frequency of the Delta F508 mutation, mainly from southern Europe. The CFTR gene analysis described here clearly demonstrated the high heterogeneity of our CF population. which could be explained by the complex ethnic composition of the Mexican population, in particular by the strong impact of the genetic pool from southern European countries MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0340-6717 UR - ISI:000086661100016 L2 - HIGH HETEROGENEITY; NONSENSE MUTATION; GENE-FREQUENCIES; DNA; CHROMOSOMES; ACCOUNT; AMPLIFICATION; 90-PERCENT; POPULATION; DELTA-F508 SO - Human Genetics 2000 ;106(3):360-365 1469 UI - 16674 AU - Ortega-Morales O AU - Guezennec J AU - Hernandez-Duque G AU - Gaylarde CC AU - Gaylarde PM AD - IFREMER, DRV VP BMM, Lab Biochim Mol Marines, F-29280 Plouzane, FranceUniv Mayab, Fac Ingn, Merida 97310, Yucatan, MexicoUFRGS, Dept Soils, MIRCEN, BR-90001970 Porto Alegre, RS, BrazilOrtega-Morales, O, IFREMER, DRV VP BMM, Lab Biochim Mol Marines, BP 70, F-29280 Plouzane, France TI - Phototrophic biofilms on ancient Mayan buildings in Yucatan, Mexico AB - Buildings at the important archaeological sites of Uxmal and Kabah, Mexico, are being degraded by microbial biofilms, Phospholipid fatty acid (PLFA) and chlorophyll a analyses indicated that phototrophs were the major epilithic microorganisms and were more prevalent on interior walls than exterior walls. Culture and microscopical techniques showed that Xenococcus formed the major biomass on interior surfaces, but the stone-degrading genera Gloeocapsa and Synechocystis were also present in high numbers. Relatively few filamentous algae and cyanobacteria were detected. The fatty acid analysis also showed that complex biofilms colonize these buildings. Circular depressions observed by scanning electron microscopy (SEM) on stone and stucco surfaces beneath the biofilm corresponded in shape and size to coccoid cyanobacteria. SEM images also demonstrated the presence of calcareous deposits on some coccoid cells in the biofilm. Phototrophic biofilms may contribute to biodegradation by (1) providing nutrients that support growth of acid-producing fungi and bacteria and (2) active "boring" behavior, the solubilized calcium being reprecipitated as calcium carbonate MH - Brazil MH - France MH - Mexico|Yucatan PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 18 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000084502600001 L2 - CYANOBACTERIA; ALGAE; DETERIORATION; BIOMASS; ACIDS SO - Current Microbiology 2000 ;40(2):81-85 1470 UI - 16265 AU - Ortega-Ortiz JG AU - Villa-Ramirez B AD - Univ Nacl Autonoma Mexico, Inst Biol, Lab Mastozool, Mexico City 04510, DF, MexicoEscuela Nacl Estudios Profes Iztacala, Tlalnepantla 54090, MexicoOrtega-Ortiz, JG, Texas A&M Univ, Marine Mammal Res Program, 4700 Ave U,Bldg 303, Galveston, TX 77551 USA TI - Polydactyly and other features of the manus of the vaquita, Phocoena sinus AB - The vaquita (Phocoena sinus) manus was examined in 16 individuals. The carpus has a proximal row of three bones and a cartilaginous accessory carpal element distocaudal to the ulna. Five metacarpal bones are present. A process in distocaudal aspect of Metacarpal III and an additional digital ray were present in all individuals examined. The number of phalanges in the additional digital ray varied among individuals and, sometimes, between the left and the right flipper of the same individual. The suggested phalangeal formula is I-1, II-7-8, III-6-7, IV-0-3, V-3-4, VI-1. The presence of this particular form of polydactyly may be the result of genetic drift in the small vaquita population MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000086106200001 L2 - vaquita;Phocoena sinus;manus;polydactyly;osteology;EVOLUTION; CETACEA SO - Marine Mammal Science 2000 ;16(2):277-286 1471 UI - 15650 AU - Ortega A AU - Becker VM AU - Alvarez R AU - Lepock JR AU - Gonzales-Serratos H AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Waterloo, Dept Biol, Waterloo, ON N2L 3GI, CanadaUniv Waterloo, Dept Phys, Waterloo, ON N2L 3GI, CanadaUniv Maryland, Dept Physiol, Baltimore, MD 21201, USAOrtega, A, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, AP 70-159, Mexico City 04510, DF, Mexico TI - Interaction of D-600 with the transmembrane domain of the sarcoplasmic reticulum Ca2+-ATPase AB - Experiments were performed to determine whether the organic Ca2+ channel blocker D-600 (gallopamil), which penetrates into muscle cells, affects sarcoplasmic reticulum (SR) Ca2+ uptake by directly inhibiting the light SR Ca2+-ATPase. We have previously shown that at 10 mu M, D-600 inhibits LSR ATP-dependent Ca2+ uptake by 50% but has no effect on ATPase activity (21). These data suggest that the SR Ca2+-ATPase might be a potential target for D-600. The ATPase activity of the enzyme is associated with its hydrophilic cytoplasmic domain, whereas Ca2+ binding and translocation are associated with the transmembrane domain (18). In the present experiments, we determined which of the two domains of the ATPase is affected by D-600. Thermal inactivation experiments using the SR Ca2+-ATPase demonstrated that D-600 decreased the thermal stability of Ca2+ transport but had no effect on the stability of ATPase activity. In addition, D-600 at a concentration of 160 mu M did not have any leaking effect of Ca2+ on the Ca2+-loaded SR. Thermal denaturation profiles of SR membranes revealed that D-600 interacts directly with the transmembrane domain of the Ca2+-ATPase. No evidence for interaction with the nucleotide domain was obtained. We conclude that the Ca2+ blocker D-600 inhibits the SR Ca2+ pump specifically by interacting with the transmembrane Ca2+-binding domain of the Ca2+-ATPase MH - Canada MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Cell Biology;Physiology U5 - J;Article AV - English IS - 0363-6143 UR - ISI:000088302000018 L2 - calcium channel blocker;thermal denaturation profiles;transmembrane domain;FROG SKELETAL-MUSCLE; CALCIUM-ANTAGONIST; FIBERS; DILTIAZEM; D600; VERAPAMIL SO - American Journal of Physiology-Cell Physiology 2000 ;279(1):C166-C172 1472 UI - 16570 AU - Ortega A AU - Wieshuber K AU - Linnemann M AU - Lambotte S AU - Bechinger B AD - Univ Nacl Autonoma Mexico, Dept Fis, Fac Med, Mexico City 04510, DF, MexicoMax Planck Inst Biochem, Martinsried, Germany TI - Calorimetric description of structural changes of Colicin-B and its channel-forming domain, induced by pH and lipid interaction MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 1 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779301023 SO - Biophysical Journal 2000 ;78(1):176A-176A 1473 UI - 14956 AU - Ortega M AU - Santana G AU - Morales-Acevedo A AD - IPN, CINVESTAV, Dept Ingn Elect, Mexico City 07360, DF, MexicoUniv La Habana, IMRE, Fac Fis, La Habana 43100, CubaMorales-Acevedo, A, IPN, CINVESTAV, Dept Ingn Elect, Ave IPN 2508,Apartado Postal 14-740, Mexico City 07360, DF, Mexico TI - Optoelectronic properties of CdO/Si photodetectors AB - CdO/Si heterojunctions were fabricated by depositing CdO polycrystalline thin films on p-type single crystalline silicon wafers by CBD. The current-voltage characteristics under dark and illumination of CdO/Si devices resemble those of a light sensitive diode. From the CdO/Si diode spectral sensitivity curves (A/W), it has been implied that CdO films allow a high sensitivity response in the visible and the near infrared regions. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000165065100008 SO - Solid-State Electronics 2000 ;44(10):1765-1769 1474 UI - 15143 AU - Ortiz-Hidalgo C AU - Bojorge BD AU - bores-Saavedra J AD - Univ Texas, SW Med Ctr, Dept Pathol, Div Anat Pathol, Dallas, TX 75235, USAAmer British Cowdray Med Ctr, Dept Pathol, Mexico City, DF, MexicoAlbores-Saavedra, J, Univ Texas, SW Med Ctr, Dept Pathol, Div Anat Pathol, 5323 Harry Hines Blvd, Dallas, TX 75235 USA TI - Stromal tumor of the gallbladder with phenotype of interstitial cells of Cajal - A previously unrecognized neoplasm AB - We report a small, well-demarcated stromal tumor of the gallbladder in a 69-year-old woman. The tumor and associated cholelithiasis led to chronic cholecystitis symptoms. The wall of the gallbladder contained a 2.4-cm hypocellular nodule composed of bland spindle-shaped cells that were immunoreactive for vimentin. CD34, and CD117. With the latter antibody, which stains interstitial cells of Cajal (ICC), the neoplastic cells appear fusiform with elongated bipolar projections or dendritic-like cytoplasmic projections. The gallbladder wall adjacent to the tumor contained numerous CD117-positive cells in close contact with the normal smooth muscle cells, whereas two of 10 gallbladders with minimal chronic cholecystitis showed only a few CD117-positive cells. These findings provide evidence that this stromal tumor of the gallbladder shows ICC differentiation similar to some stromal tumors of the gut. The presence of numerous ICC in the uninvolved gallbladder wall suggests that this tumor might have evolved through hyperplasia of ICC MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 30 U4 - Pathology;Surgery U5 - J;Article AV - English IS - 0147-5185 UR - ISI:000089693800013 L2 - stromal tumor of the gallbladder;interstitial cells of Cajal;CD117;CD34;SMALL-INTESTINE; JEJUNUM; ORIGIN; ILEUM; CD34 SO - American Journal of Surgical Pathology 2000 ;24(10):1420-1423 1475 UI - 16586 AU - Ortiz GG AU - Reiter RJ AU - Zuniga G AU - Melchiorri D AU - Sewerynek E AU - Pablos MI AU - Oh CS AU - Garcia JJ AU - Bitzer-Quintero OK AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Neurociencias, Guadalajara 44340, Jalisco, MexicoUniv Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78284, USAInst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Mol Med, Guadalajara, Jalisco, MexicoOrtiz, GG, Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Neurociencias, Sierra Mojada 800, Guadalajara 44340, Jalisco, Mexico TI - Genotoxicity of paraquat: micronuclei induced in bone marrow and peripheral blood are inhibited by melatonin AB - The ability of melatonin to influence paraquat-induced genotoxicity was tested using micronucleated polychromatic erythrocytes as an index of damage in both bone marrow and peripheral blood cells of mice. Melatonin (10 mg/kg) or an equal volume of saline were administered intraperitoneally (ip) to mice 30 min prior to an ip injection of paraquat (20 mg/kg x 2), and thereafter at 6-h intervals until the conclusion of the study (72 h). The number of the micronucleated polychromatic erythrocytes increased after paraquat administration both in peripheral blood and bone marrow cells. Melatonin administration to paraquat-treated mice significantly reduced micronuclei formation in both peripheral blood and bone marrow cells; these differences were apparent at 24, 48 and 72 h after paraquat administration. The induction of micronuclei was time-dependent with peak values occurring at 24 and 48 h. The reduction in paraquat-related genotoxicity by melatonin is likely due in part to the antioxidant activity of the indole. We did not observe effects of melatonin over paraquat in paraquat + melatonin groups incubated at 0, 60 and 120 min. Mitomycin C, which was used as a positive control, also caused the expected large rises in micronuclei in both bone marrow and peripheral blood cells at 24, 48 and 72 h after its administration. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000085014500008 L2 - melatonin;paraquat;micronuclei;polychromatic erythrocyte;bone marrow;blood;INDUCED DNA-DAMAGE; LIPID-PEROXIDATION; RATS; OXYGEN; DIQUAT; ANTIOXIDANT; TOXICITY; KAINATE; CELLS; LUNG SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2000 ;464(2):239-245 1476 UI - 14621 AU - Ortiz JL AU - Amigo V AU - Salvador MD AU - Perez CR AD - Inst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan & Ind, Santiago 76130, Queretaro, MexicoUniv Politecn Valencia, Dept Ingn Mecan & Mat, Valencia 46022, SpainUniv Nacl Gen San Martin, Comis Nacl Energia Atom, Inst Tecnol Jorge A Sabato, RA-1499 Buenos Aires, DF, ArgentinaOrtiz, JL, Inst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan & Ind, Campus Queretaro,Epigmenio Gonzalez 500, Santiago 76130, Queretaro, Mexico TI - Microstructure and mechanical properties of Al-Mg-Si-Cu matrix composites reinforced with AlNp, processed by extrusion of powders AB - This article presents an experimental investigation on the structure and mechanical properties of an Al-Mg-Si-Cu P/M alloy reinforced with 5%, 10% and 15% aluminum nitride, produced by extrusion of cold compacted powders mixtures. Mechanical properties in "as extruded" and T6 conditions are compared. Differential Scanning Calorimetry and Dilatometric analysis were conducted to gain further insight into the precipitation process of these materials. Low cost 6061Al/AlNp composites can be produced with rare and small porosity by extrusion of cold compacted shapes without canning. The mechanical properties of the MMCs obtained by this process have Limitations for high particles fractions because of clustering effects. All materials are always harder than the matrix and shows a similar behavior during aging processes hut kinetics is changed. Potential applications of dilatometric techniques in the aging investigations of aluminum alloys and aluminum matrix composites have been established MH - Argentina MH - Mexico|Queretaro MH - Spain PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 3 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - Spanish IS - 0034-8570 UR - ISI:000166048800004 L2 - extrusion;powder consolidation;aluminum alloys;aging;metal matrix composites;TENSILE PROPERTIES; AGING BEHAVIOR; TEMPERATURE; ALLOYS; ALUMINUM SO - Revista de Metalurgia 2000 ;36(5):348-356 1477 UI - 15865 AU - Ortiz JL AU - Sada PV AU - Rubio LRB AU - Aceituno FJ AU - Aceituno J AU - Gutierrez PJ AU - Thiele U AD - CSIC, Inst Astrofis Andalucia, Granada 18080, SpainUniv Monterrey, Dept Fis & Matemat, Nuevo Leon 66238, MexicoInst Astrofis Canarias, E-38200 Tenerife, SpainCtr Astron Hispano Aleman, Almeria 04080, SpainOrtiz, JL, CSIC, Inst Astrofis Andalucia, Aptdo 3004, Granada 18080, Spain TI - Optical detection of meteoroidal impacts on the Moon AB - Impacts of meteoroids on the Moon should cause detectable optical flashes(1), but the population of objects that are big enough is very low, and hitherto no unambiguous impact flashes have been recorded. The flux of meteoroids associated with the Leonid meteor shower of 18 November 1999 was predicted to produce observable flashes on the night side of the Moon(2). Here we report the unambiguous detection of five such impact flashes, three of which were seen simultaneously by other observers(3). We also observed a possible impact flash on 16 July 1999. All of the flashes were of very brief duration (<0.02 s), as expected for high-speed impacts MH - Mexico|Nuevo Leon MH - Spain PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 16 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000087732700041 L2 - ATMOSPHERE SO - Nature 2000 ;405(6789):921-923 1478 UI - 16146 AU - Osete ML AU - Ruiz-Martinez VC AU - Caballero C AU - Galindo C AU - Urrutia-Fucugauchi J AU - Tarling DH AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Tierra, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, MexicoUniv Complutense Madrid, Fac Ciencias Geol, Dept Petrol & Geoquim, E-28040 Madrid, SpainUniv Plymouth, Dept Geol Sci, Plymouth PL4 8AA, Devon, EnglandOsete, ML, Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Tierra, E-28040 Madrid, Spain TI - Southward migration of continental volcanic activity in the Sierra de Las Cruces, Mexico: palaeomagnetic and radiometric evidence AB - New Palaeomagnetic data for 30 sites (271 samples) and K-Ar data from five units in the Sierra de Las Cruces, western Basin of Mexico, provide constraints on the spatial-temporal evolution of are magmatism in the central Trans-Mexican Volcanic Belt. The normal and reversed directions show a polarity pattern with a consistent spatial zonation perpendicular to the NNW-SSE trend of the range. The magnetostratigraphy and K-Ar dates indicate that volcanic activity in the Sierra de Las Cruces migrated southeastward at a mean rate of 1.6 cm/a, between 3.6 and 1.8 Ma, sind that the rate of migration may have been higher, up to 4 cm/a, during the Gauss Chron. Normal and reversed directions pass the reversal test at a 95% confidence level. The mean Plio-Quaternary palaeomagnetic direction for Sierra de Las Cruces is D =350.7 degrees, I = 30.6 degrees (N = 25, k = 30.7, alpha(95) = 5.3 degrees). The declination deviates to the west of the expected direction, which suggests that small counterclockwise rotations could take place during formation of the Sierra de Las Cruces volcanics. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700010 L2 - continental volcanism;K-Ar dating;palaeomagnetism;Trans-Mexican Volcanic Belt;volcanic activity migration;REMAGNETIZATION CIRCLES; PALEOMAGNETISM SO - Tectonophysics 2000 ;318(1-4):201-215 1479 UI - 16498 AU - Osorio-Morales S AU - Saldivar SOS AU - Contreras JC AU - meida-Dominguez HD AU - Rooney LW AD - Inst Tecnol & Estudios Super Monterrey, Dept Tecnol Alimentos, Monterrey 64849, NL, MexicoPrograma Grad Ingn Alimentos, Monterrey 64849, NL, MexicoTexas A&M Univ, Dept Soil & Crop Sci, Cereal Qual Lab, College Stn, TX 77843, USASaldivar, SOS, Inst Tecnol & Estudios Super Monterrey, Dept Tecnol Alimentos, Campus Monterrey,Av Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - Production of brewing adjuncts and sweet worts from different types of sorghum AB - Four different sorghum genotypes, white normal (WNO), white waxy (WWX), white heterowaxy (WHWX), and brown normal (BNO), were decorticated in a pilot-plant decorticator mill and then roller-milled into brewing grits. Grain hardness values determined with the tangential abrasive dehulling device mill indicated that the BNO sorghum had the softest endosperm and yielded the lowest amount of decorticated kernels. Decorticated kernels had lower protein, crude fiber, ash, and color scores and higher starch contents than their respective whole kernels. The yield of brewing adjuncts from decorticated WNO, WWX, WHWX, and BNO were 87.4, 89.9, 90.0, and 81%, respectively. Worts produced from WWX brewing adjuncts filtered faster than the heterowaxy and normal counterparts. In practical terms, all sorghum worts, standardized to 14 degrees P, had similar pH, viscosity, alpha-amino nitrogen, and color scores. The fermentable carbohydrate content of the BNO sorghum wort was slightly lower when compared with all of the white sorghum worts. White sorghums with hard and waxy endosperms were the most suitable for use as brewing adjuncts MH - Mexico|Nuevo Leon MH - USA PB - ST PAUL: AMER SOC BREWING CHEMISTS INC RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0361-0470 UR - ISI:000085388500005 L2 - brewing adjuncts;sweet worts;waxy sorghum;wort filtration SO - Journal of the American Society of Brewing Chemists 2000 ;58(1):21-25 1480 UI - 14838 AU - Osuna-Castro JA AU - Rascon-Cruz Q AU - Napier J AU - Fido RJ AU - Shewry PR AU - Paredes-Lopez O AD - IPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioquim, Unidad Irapuato, Irapuato 36500, Gto, MexicoUniv Bristol, Long Ashton Res Stn, Dept Agr Sci, IACR, Bristol BS41 9AF, Avon, EnglandParedes-Lopez, O, IPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioquim, Unidad Irapuato, Apartado Postal 629, Irapuato 36500, Gto, Mexico TI - Overexpression, purification, and in vitro refolding of the 11S globulin from amaranth seed in Escherichia coli AB - An amarantin 11S globulin cDNA encoding one of the most important storage proteins of amaranth seeds, with a high content of essential amino acids, was expressed in Escherichia coli. A good level of expression of recombinant amarantin with a molecular weight of 59 kDa was obtained. The recombinant protein was extracted by ammonium sulfate precipitation and purified to homogeneity using ion-exchange chromatography and reversed phase high-performance liquid chromatography. The expressed protein exhibited electrophoretic, immunochemical, and surface hydrophobicity properties similar to those of native amarantin from amaranth seed. Also, the recombinant protein was refolded in vitro using two different methods MH - United Kingdom MH - Mexico|Guanajuato PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000165490000026 L2 - storage protein;amarantin;heterologous expression;recombinant amarantin;expression induction;immunodetection;in vitro refolding;HIGH-LEVEL EXPRESSION; REPETITIVE DOMAIN; GLUTENIN SUBUNITS; STORAGE PROTEIN; HYPOCHONDRIACUS SO - Journal of Agricultural and Food Chemistry 2000 ;48(11):5249-5255 1481 UI - 15598 AU - Otero XL AU - Huerta-Diaz MA AU - Macias F AD - Univ Santiago de Compostela, Fac Biol, Dep Edafol & Quim Agricola, Santiago De Compostela 15706, SpainUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22830, Baja California, MexicoOtero, XL, Univ Santiago de Compostela, Fac Biol, Dep Edafol & Quim Agricola, Santiago De Compostela 15706, Spain TI - Heavy metal geochemistry of saltmarsh soils from the Ria of Ortigueira (mafic and ultramafic areas, NW Iberian Peninsula) AB - Concentrations of Fe, Mn, Ni, Cu, Cr and Zn in their total, silicate, organic, reactive and pyrite fractions were determined in soils collected from the Ortigueira saltmarshes (Esteiro, Ladrido and Mera, NW Iberian Peninsula), from sediments of the Landoi and Esteiro Rivers, and from sludge generated by a nearby dunite mine. The Esteiro saltmarsh presented clear enrichments of the four metals studied (first 10 cm), especially of Ni and Cr, whose concentrations were among the highest. It is proposed that the elevated Cr and Ni levels found in the Esteiro saltmarsh were derived from recent contributions of the mine, which are partially discharged into the Landoi River. Total Cu and Zn concentrations were lower than the corresponding ones for Cr and Ni. Under suboxic conditions, Ni, Cr, Cu and Zn were mainly associated with the reactive fraction. Under anoxic conditions, Cu and Ni were associated mainly with the pyrite phase. Pyritic Zn and Cr concentrations were relatively low and similar in all three saltmarshes; however, where anoxic-sulfidic conditions prevailed these two metals were mainly associated with the reactive and organic fractions. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 16 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000088347700011 L2 - saltmarsh soils;geochemistry;heavy metals;ultramafic rocks;ANOXIC MARINE-SEDIMENTS; TRACE-METALS; ESTUARINE SEDIMENTS; SULFIDE MINERALS; NORTHWEST SPAIN; SALT-MARSH; SPECIATION; IRON; BIOAVAILABILITY; ACCUMULATION SO - Environmental Pollution 2000 ;110(2):285-296 1482 UI - 16123 AU - Pachon H AU - Hurtado E AU - Creed-Kanashiro H AU - Rivera J AU - Lutter CK AU - Freire WB AU - Schroeder DG AU - Martorell R AD - Emory Univ, Atlanta, GA 30322, USAInst Invest Nutr, Lima, PeruInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoPan Amer Hlth Org, Washington, DC, USA TI - ProPAN: A diagnostic tool to assist program planners in improving young child nutrition in developing countries MH - Mexico|Morelos MH - Peru MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918102900 SO - Faseb Journal 2000 ;14(4):A501-A501 1483 UI - 15192 AU - Page D AU - Geppert U AU - Zannias T AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Michoacana SNH, Inst Fis & Matemat, Morelia, Michoacan, MexicoPage, D, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - General relativistic treatment of the thermal, magnetic and rotational evolution of isolated neutron stars with crustal magnetic fields AB - We investigate the thermal, magnetic and rotational evolution of isolated neutron stars assuming that the dipolar magnetic field is confined to the crust. Our treatment, for the first time, uses a fully general relativistic formalism not only fur the thermal but also for the magnetic part, and includes partial general relativistic effects in the rotational part. Due to the fact that the combined evolution depends crucially upon the compactness of the star, three different equations of state have been employed in the calculations. In the absence of general relativistic effects, while upon increasing compactness a decrease of the crust thickness takes place leading into an accelerating field decay, the inclusion of general relativistic effects intend to "decelerate this acceleration". As a consequence we find that, within the crustal field hypothesis, a given equation of state is compatible with the observed distribution of pulsar periods P and period derivative P provided the initial field strength and current location as well as the magnitude of the impurity content are appropriately constrained. Finally, we access the flexibility of the soft, medium and stiff classes of equations of state as candidates in describing the state of the matter in the neutron star interiors. The comparison of our model calculations with observations, together with the consideration of independent information about neutron star evolution, suggests that a not too soft equation of state describes neutron star interiors and its cooling proceeds along the 'standard' scenario MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000089494500026 L2 - stars : neutron;stars : pulsars : general;stars : magnetic fields;relativity;dense matter;magnetic fields;SURFACE-TEMPERATURE; RADIO PULSARS; DENSE MATTER; URCA PROCESS; OHMIC DECAY; ROSAT DATA; SUPERFLUID; CONDUCTIVITIES; EQUATION; PROTON SO - Astronomy and Astrophysics 2000 ;360(3):1052-1066 1484 UI - 15302 AU - Page D AU - Prakash M AU - Lattimer JM AU - Steiner AW AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoSUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAPage, D, Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Prospects of detecting baryon and quark superfluidity from cooling neutron stars AB - Baryon and quark superfluidity in the cooling of neutron stars an investigated. Future observations will allow us to constrain combinations of the neutron or Lambda-hyperon pairing gaps and the star's mass. However, in a hybrid star with a mixed phase of hadrons and quarks, quark gaps larger than a few tenths of an MeV render quark matter virtually invisible for cooling. If the quark gap is smaller, quark superfluidity could be important, but its effects will be nearly impossible to distinguish from those of other baryonic constituents MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 76 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000089065400004 L2 - DIRECT URCA PROCESS; COLOR SUPERCONDUCTIVITY; MATTER; DENSITY; EQUATION; FLAVOR; STATE; QCD SO - Physical Review Letters 2000 ;85(10):2048-2051 1485 UI - 14358 AU - Page RE AU - Fondrk MK AU - Hunt GJ AU - Guzman-Novoa E AU - Humphries MA AU - Nguyen K AU - Greene AS AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USAINIFAP, SAGAR, Las Hadas, Metepec, MexicoPage, RE, Univ Calif Davis, Dept Entomol, Davis, CA 95616, USA TI - Genetic dissection of honeybee (Apis mellifera L.) foraging behavior AB - We demonstrate the effects of a new quantitative trait locus (QTL), designated pln3, that was mapped in a backcross population derived from strains of bees selected for the amount of pollen they store in combs. We independently confirmed pln3 by demonstrating its effects on individual foraging behavior, as we did previously for QTLs pln1 and pln2 (Hunt et al. 1995), QTL pln2 is very robust In its effects on foraging behavior. In this study, pln2 was again shown to affect individual foraging behavior of workers derived from a hybrid backcross of the selected strains. In addition, pln2 was shown to affect the amount of pollen stored in combs of colonies derived from a wide cross of European and Africanized honeybees. This is noteworthy because it demonstrates that we can map QTLs for behavior in interstrain crosses derived from selective breeding and study their effects if; unselected, natural populations. The results we present also demonstrate the repeatability of finding QTLs with measurable effects, even after outcrossing selected strains, suggesting that there is a relatively small subset of QTLs with major effects segregating in the population from which we selected our founding breeding populations. The different QTLs, pln1, pln2, and pln3, appear to have different effects, revealing the complex genetic architecture of honeybee foraging behavior MH - Mexico|Estado De Mexico MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 35 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0022-1503 UR - ISI:000166819000008 L2 - QUANTITATIVE TRAIT LOCI; MENDELIAN FACTORS; QTL ANALYSIS; DROSOPHILA-MELANOGASTER; TASK SPECIALIZATION; MOLECULAR MARKERS; LINKAGE MAP; BEE; SELECTION; TOMATO SO - Journal of Heredity 2000 ;91(6):474-479 1486 UI - 16117 AU - Palmeros B AU - Wild J AU - Szybalski W AU - Le Borgne S AU - Hernandez-Chavez G AU - Gosset G AU - Valle F AU - Bolivar F AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoUniv Wisconsin, Sch Med, Mcardle Lab Canc Res, Madison, WI 53706, USAGenencor Int Inc, Palo Alto, CA 94304, USABolivar, F, Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, Mexico TI - Family of removable cassettes designed to obtain antibiotic-resistance-free genomic modifications of Escherichia coli and other bacteria AB - Modifications of microbial genomes often require the use of the antibiotic-resistance CAnb(R))-encoding genes and other easily selectable markers. We have developed a set of such selectable markers (Cm-R, Km(R) and Gm(R)), which could easily be inserted into the genome and subsequently removed by using the Cre/loxP site-specific recombination system of bacteriophage pi. In this manner the same marker could be used more than once in the same background, while the resulting strain could or would remain Anb(R) marker-free. Three plasmids were constructed, each containing a cassette consisting of the Cm-R, Km(,)(R) or Gm(R) gene flanked by two parallel loxP sites and two polylinkers (MCS). To test insertion and excision, cassettes were inserted into the lacZ or galE genes carried on an ori gamma/pir-dependent suicide plasmid, which contained a dominant Sm-R gene. The cassettes were crossed into the E. coli genome by homologous recombination (allelic exchange), in a manner analogous to that described by Posfai et al. [Nucl. Acids Res. 22 (1994) 2392-2398], selecting for the Cm-R, Km(R), or Gm(R), for the LacZ(-) or GalE(-) and for the Sm-S phenotypes (the latter to assure allelic exchange rather than insertion of the entire plasmid). When required, after selecting the strain with the desired modification, the CmR, KmR, or GmR marker was excised by supplying the Cre function. Cre was provided by the thermosensitive plasmid pJW168, which was transformed into the Anb(R) host at 30 degrees C, and was subsequently eliminated at 42 degrees C. Thus the Anb(R) marker was removed, whereas the lacZ or galE gene remained interrupted by the retained loxP site. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0378-1119 UR - ISI:000086689100026 L2 - Cre;loxP;recombinant DNA tools;site-specific recombination;unmarked strains;SITE-SPECIFIC RECOMBINATION; CHROMOSOMAL INTEGRATION; RESOLUTION SYSTEM; PLASMID PSC101; SUICIDE VECTOR; CONSTRUCTION; GENE; EXCISION; CLONING; LOXP SO - Gene 2000 ;247(1-2):255-264 1487 UI - 16334 AU - Panek JA AU - Matson PA AU - Ortiz-Monasterio I AU - Brooks P AD - Univ Calif Berkeley, Berkeley, CA 94720, USAStanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305, USACtr Int Mejoramiento Maiz & Trigo, Obregon 85000, Sonora, MexicoPanek, JA, Univ Calif Berkeley, 151 Hilgard Hall, Berkeley, CA 94720 USA TI - Distinguishing nitrification and denitrification sources of N2O in a Mexican wheat system using N-15 AB - Irrigated wheat systems in the Yaqui Valley of Sonora, Mexico, receive high nitrogen inputs and large discrete inputs of irrigation water, with extended drying periods between irrigation events. We used this system to determine the contribution of the separate processes of nitrification and denitrification to the total N2O flux from the soil and to link each process with important driving variables. At the beginning of the wheat cycle, in an experimental wheat field, we established and maintained replicated, paired soil plots labeled with 25% atom excess (a.e.) (KNO3)-N-15 and ((NH4)-N-15)(2)SO4 at a rate of 7% of the existing pool of NO3- and NH4+, respectively, and measured the evolution of (N2O)-N-15 in each over the course of an irrigation/fertilization cycle. Denitrification losses of N2O predominated over nitrification in the two days following irrigation, and continued for six days. The duration of denitrification was corroborated by measures of N-15(2) flux. Nitrification became increasingly important as soils drained, Each process contributed equally to total N2O losses over the 4-wk period after the wheat cycle began MH - Mexico|Sonora MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 15 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 1051-0761 UR - ISI:000086008300016 L2 - denitrification;dinitrogen flux;Mexican wheat system;nitrification;nitrous oxide flux;soil microbial processes;trace gas loss;wheat cycle, N2O emissions;NITROUS-OXIDE; FIELD MEASUREMENT; DINITROGEN; EMISSIONS; SOILS; MODEL SO - Ecological Applications 2000 ;10(2):506-514 1488 UI - 16379 AU - Paparo M AU - Rodriguez E AU - McNamara BJ AU - Kollath Z AU - Rolland A AU - Gonzalez-Bedolla SF AU - Jiang SY AU - Li ZP AD - Konkoly Observ Budapest, H-1525 Budapest 12, HungaryCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainNew Mexico State Univ, Las Cruces, NM 88003, USAUNAM, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoChinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R ChinaPaparo, M, Konkoly Observ Budapest, POB 67, H-1525 Budapest 12, Hungary TI - A comprehensive study of the delta Scuti star, 57 Tauri (= HR 1351) in the Hyades cluster AB - A comprehensive frequency analysis of 57 Tau, supposed only a static pulsational arrangement, is presented based on 54 nights of photometric data collected between 1981 and 1995 (altogether 232 hours). The presence of individual frequencies is confirmed by intercomparing four subsets of this data set, however, the uncertainties in data coming from the sparse nights and low signal weaken the conclusion on some results. The entire data base is then used to resolve closely spaced peaks. Twelve frequencies are indentified using this process. Further multisite observations are recommended to confirm the present frequency solution. Two periods, with a high probability of being real, are found in the low frequency domain. They are suggested to arise from binarity or g modes, as in gamma Dor stars. Single unusual cycles, possessing large amplitude, or displaying asymmetry, have been localized. A coherent frequency at 29.83 c/d with variable amplitude was found. The nonstandard behaviour of the light variation indicates that nonlinear and/or nonstationary processes could be very important in the investigation of delta Scuti observations MH - Hungary MH - Mexico|Baja California MH - Peoples R China MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000085838900001 L2 - stars : individual : 57 Tau = HR 1351;stars : oscillations;stars : variables : delta Sct;stars : binaries : spectroscopic;PHOTOELECTRIC PHOTOMETRY; NONRADIAL PULSATION; GAMMA-DORADUS; BINARY-SYSTEM; FREQUENCIES; VARIABLES; CAMPAIGN; CATALOG SO - Astronomy & Astrophysics Supplement Series 2000 ;142(1):1-11 1489 UI - 16652 AU - Papenbrock T AU - Prosen T AD - Ctr Int Ciencias AC, Cuernavaca 62131, Morelos, MexicoUniv Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana 1111, SloveniaPapenbrock, T, Univ Washington, Dept Phys, Inst Nucl Theory, Seattle, WA 98195 USA TI - Quantization of a billiard model for interacting particles AB - We consider a billiard model of a self-bound, interacting three-body system in two spatial dimensions. Numerical studies show that the classical dynamics is chaotic. The corresponding quantum system displays spectral fluctuations that exhibit small deviations from random matrix theory predictions. These can be understood in terms of a new type of scarring caused by a one-parameter family of orbits inside the collinear manifold MH - Mexico|Morelos MH - Slovenia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000084661500014 L2 - 3-DIMENSIONAL SINAI BILLIARD; CHAOTIC 3D BILLIARD; QUANTUM-MECHANICS; PERIODIC-ORBITS; SMOOTH BOUNDARY; WAVE-FUNCTIONS; SYSTEMS; SCARS; STATISTICS SO - Physical Review Letters 2000 ;84(2):262-265 1490 UI - 15933 AU - Papi A AU - Stanciu LA AU - Papadopoulos NG AU - Teran LM AU - Holgate ST AU - Johnston SL AD - Univ Ferrara, Res Ctr Asthma & Chron Obstruct Pulm Dis, Ferrara, ItalyUniv Southampton, Southampton, Hants, EnglandUniv London Imperial Coll Sci Technol & Med, Sch Med, Natl Heart & Lung Inst, Dept Resp Med, London, EnglandInst Nacl Enfermedades Resp, Mexico City, DF, MexicoPapi, A, Univ Ferrara, Res Ctr Asthma & Chron Obstruct Pulm Dis, Via Savonarola 9, Ferrara, Italy TI - Rhinovirus infection induces major histocompatibility complex class I and costimulatory molecule upregulation on respiratory epithelial cells AB - Human respiratory epithelial cells may act as antigen-presenting cells during respiratory viral infections. In addition to major histocompatibility complex (MHC) molecules, antigen presentation requires participation of costimulatory molecules, Here the authors investigated class I and class II antigens and B7-1 and B7-2 costimulatory molecule expression in human A549 pulmonary epithelial cells and primary bronchial epithelial cells (HBECs) at baseline and after rhinovirus infection. Constitutive expression of MHC class I and B7-1 molecules was observed on both cell types. MHC class I molecules were up-regulated by rhinovirus infection, while B7-1 was up-regulated only on A549 cells. B7-2 molecules were constitutively expressed at a low level and were up-regulated by rhinovirus only on HBECs, Rhinovirus induction of antigen-presenting molecule expression on A549 cells was accompanied by cellular activation in terms of induction of release of the chemokines RANTES and Gro alpha. These data show that respiratory epithelium expresses full antigen-presentation machinery and that rhinovirus infection up-regulates this expression MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 23 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000087353700038 L2 - NF-KAPPA-B; MHC CLASS-I; ADHESION MOLECULE-1; TRANSCRIPTION; EXPRESSION; ICAM-1; ASTHMA; EXACERBATIONS; RECEPTOR SO - Journal of Infectious Diseases 2000 ;181(5):1780-1784 1491 UI - 15000 AU - Paraguay DF AU - Miki-Yoshida M AU - Morales J AU - Solis J AU - Estrada LW AD - Ctr Invest Mat Avanzados Cervantes, Dept Microscopia Elect, Chihuahua 31109, MexicoUniv Nacl Ingn, Fac Ciencias, Lima 31, PeruMiki-Yoshida, M, Ctr Invest Mat Avanzados Cervantes, Dept Microscopia Elect, Miguel Cervantes 120, Chihuahua 31109, Mexico TI - Influence of Al, In, Cu, Fe and Sn dopants on the response of thin film ZnO gas sensor to ethanol vapour AB - A spray pyrolysis technique was used to obtain ZnO:X films doped with different elements, X = Al, In, Cu, Fe and Sn. X-Ray diffraction, transmission electron microscopy and scanning electron microscopy were used to study the microstructure and surface morphology of the films. From the microstructural analysis, we can conclude that the amount as well as the type of dopant modifies the microstructure and surface morphology. Since it goes from non-oriented growth, for undoped films, to strongly (002) oriented, at intermediate (similar to1 at.%) doping level; and finally again to non-oriented and poor crystallinity, at high (> 3 at.%) doping level. The sensitivity of the films was studied in two steps: first, as a function of their temperature (435-675 K) for a fixed ethanol concentration (40 ppm) and secondly as a function of ethanol concentration (4-100 ppm) for a fixed temperature (675 K). A better sensitivity can be observed for Sn- and Al-doped films, with a dopant/Zn ratio of 0.4 at.% and 1.8 at.%, respectively. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Chihuahua MH - Peru PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 44 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900031 L2 - zinc oxide;ethanol;gas sensors;spray pyrolysis;SPRAY-PYROLYSIS; GROWTH SO - Thin Solid Films 2000 ;373(1-2):137-140 1492 UI - 15978 AU - Paraguay F AU - Morales J AU - Estrada W AU - Andrade E AU - Miki-Yoshida M AD - Ctr Invest Mat Avanzados, Dept Microscopia Elect, Chihuahua 31109, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Ingn, Fac Ciencias, Lima 31, PeruMiki-Yoshida, M, Ctr Invest Mat Avanzados, Dept Microscopia Elect, Miguel Cervantes 120, Chihuahua 31109, Mexico TI - Influence of Al, In, Cu, Fe and Sn dopants in the microstructure of zinc oxide thin films obtained by spray pyrolysis AB - A spray pyrolytic system was used to obtain ZnO:X films doped with different elements, X = Al, In, Cu, Fe and Sn. A 0.1 M solution of zinc acetate in a mixture of ethanol and deionised water, in a volume proportion of 3:1, was employed. Dopant sources were aluminium chloride, indium acetate, copper acetate, iron chloride and tin tetrachloride. The atomic percentage of dopant in solution were X/Zn = 1, 3, 5, 7, 10 and 15 at.%. The proportion between dopant atoms and Zn atoms are not the same in the film as in solution, only indium-doped films maintain almost the same proportion. In the other cases, the dopant proportion in the film is less than that in the solution. X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to study the microstructure and surface morphology of the films. We can conclude that the amount as well as the type of dopant modifies the film growth process and by consequence the microstructure and surface morphology. Since it goes from non-oriented growth, for undoped films, Co strongly (002) oriented, at intermediate (similar to 1 at.%) doping level; and finally again to non-oriented and poor crystallinity, at high (>3 at.%) doping level. This behaviour is the same for all the dopants treated in this work and the highest (002) orientation seems to be happening at about the same concentration (similar to 1 at.%). Cross section micrographs show that the microstructure of the films consists of densely packed grains, which can be interpreted as a transition structure between a porous arrangement of tapered crystallites and dense columnar grains. (C) 2000 published by Elsevier Science S.A. All rights reserved MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Peru PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 28 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000087078800005 L2 - zinc oxide;pyrolysis;scanning electron microscopy;transmission electron microscopy;CHEMICAL-VAPOR-DEPOSITION; ZNO FILMS; PHYSICAL-PROPERTIES; OPTICAL-PROPERTIES; TRANSPARENT; MAGNETRON; GROWTH; ACETATE SO - Thin Solid Films 2000 ;366(1-2):16-27 1493 UI - 16062 AU - Pardo A AU - Barrios R AU - Gaxiola M AU - Segura-Valdez L AU - Carrillo G AU - Estrada A AU - Mejia M AU - Selman M AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Pathol, Houston, TX 77030, USASelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502,Col Secc 16, Mexico City 14080, DF, Mexico TI - Increase of lung neutrophils in hypersensitivity pneumonitis is associated with lung fibrosis AB - Hypersensitivity pneumonitis (HP) is characterized by a T-cell-mediated alveolitis, and the putative role of other inflammatory cells in its pathogenesis remains unclear. In this study we determined whether increased quantities of neutrophils were present in HP lungs, and if they were positive for gelatinase B and collagenase-2. Fifteen nonsmoking patients with subacute/chronic active HP were included. Lung samples were analyzed using myeloperoxidase antibody, and neutrophil/total cell ratio was evaluated by digital processing. All HP tissue samples exhibited variable quantities of neutrophils located inside vessels, and in the interstitial and alveolar spaces. Lung neutrophil percentage ranged from 0.7% to 4.8% (2.1 +/- 1.4%). There was a positive correlation between the percentage of lung neutrophils and the percentage of lung fibrosis (r = 0.6, p < 0.02). Tissue neutrophils showed intense immunoreactive collagenase-2 and gelatinase B staining. Additionally, gelatinolytic activities corresponding to progelatinases A and B and their activated forms, were several-fold increased in the bronchoalveolar lavage fluid (BALF) from patients with HP as compared with control subjects. These findings suggest that in HP lungs there is a persistent traffic of neutrophils loaded with gelatinase B and collagenase-2 that may play a role in the lung damage and in the fibrotic response MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER LUNG ASSOC RP - NOT IN FILE U3 - TC 43 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000086945400051 L2 - IDIOPATHIC PULMONARY FIBROSIS; EXTRINSIC ALLERGIC ALVEOLITIS; BRONCHOALVEOLAR LAVAGE; GELATINASE-B; MATRIX METALLOPROTEINASES; EXTRACELLULAR-MATRIX; ACTIVATION; PATHOGENESIS; COLLAGENASE; LEUKOCYTE SO - American Journal of Respiratory and Critical Care Medicine 2000 ;161(5):1698-1704 1494 UI - 16210 AU - Pardo L AU - Campillo M AU - Bosch D AU - Pastor N AU - Weinstein H AD - CUNY Mt Sinai Sch Med, Dept Physiol & Biophys, New York, NY 10029, USAUniv Autonoma Barcelona, Fac Med, Unitat Bioestadist, Lab Med Computac, E-08193 Barcelona, SpainUniv Autonoma Edo Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoWeinstein, H, CUNY Mt Sinai Sch Med, Dept Physiol & Biophys, 1 Gustave Levy Pl,Box 1218, New York, NY 10029 USA TI - Binding mechanisms of TATA box-binding proteins: DNA kinking is stabilized by specific hydrogen bonds AB - One of the common mechanisms of DNA bending by minor groove-binding proteins is the insertion of protein side chains between basepair steps, exemplified in TBP (TATA box-binding protein)/DNA complexes. At the central basepair step of the TATA box TBP produces a noticeable decrease in twist and an increase in roll, while engaging in hydrogen bonds with the bases and sugars. This suggests a mechanism for the stabilization of DNA kinks that was explored here with ab initio quantum mechanical calculations and molecular dynamics/potential of mean force calculations. The hydrogen bonds are found to contribute the energy necessary to drive the conformational transition at the central basepair step. The Asn, Thr, and Gly residues involved in hydrogen bonding to the DNA bases and sugar oxygens form a relatively rigid motif in TBP. The interaction of this motif with DNA is found to be responsible for inducing the untwisting and rolling of the central basepair step. Notably, direct readout is shown not to be capable of discriminating between AA and AT steps, as the strength of the hydrogen bonds between TBP and the DNA are the same for both sequences. Rather, the calculated free energy cost for an equivalent conformational transition is found to be sequence-dependent, and is calculated to be higher for AA steps than for AT steps MH - Mexico|Morelos MH - USA MH - Spain PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 8 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000086349500030 L2 - YEAST TFIIA/TBP/DNA COMPLEX; IRREGULAR NUCLEIC-ACIDS; CO-CRYSTAL STRUCTURE; MINOR-GROOVE; TRANSCRIPTION; DETERMINANTS; PARAMETERS; SEQUENCE; ELEMENT SO - Biophysical Journal 2000 ;78(4):1988-1996 1495 UI - 16571 AU - Pardo L AU - Bosch D AU - Campillo M AU - Pastor N AU - Weinstein H AD - Univ Autonoma Barcelona, Fac Med, Bellaterra 08193, SpainUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCUNY Mt Sinai Sch Med, New York, NY 10029, USA TI - TEE interplay between direct readout and DNA flexibility determines sequence specificity of the TATA box-binding protein interaction with the TATA box MH - Mexico|Morelos MH - Spain MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779301745 SO - Biophysical Journal 2000 ;78(1):299A-299A 1496 UI - 15587 AU - Paredes RG AU - Contreras JL AU - Agmo A AD - Univ Tromso, Dept Psychol, N-9037 Tromso, NorwayUniv Anahuac, Escuela Psicol, Mexico City, DF, MexicoUniv Autonoma Estado Morelos, Fac Ciencias Biol, Cuernavaca, Morelos, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro, MexicoAgmo, A, Univ Tromso, Dept Psychol, N-9037 Tromso, Norway TI - Serotonin and sexual behavior in the male rabbit AB - Sexual behavior was evaluated in sexually experienced male rabbits after the administration of different serotonergic drugs. The serotonin(1A) receptor agonist 8-OH-DPAT, 1 mg/kg, inhibited male rabbit sexual behavior when animals were tested 15 min after subcutaneous (SC) administration of this compound. Lower doses, 0.25 and 0.5 mg/kg, were ineffective at a test 30 min after drug injection. Furthermore, 8-OH-DPAT, 0.25 mg/kg, failed to revert the inhibitory effects upon sexual behavior produced by lidocaine application to the rabbit penis. Stimulation of 5-HT1B/2C receptors by TFMPP, at doses between 0.625 and 2.5 mg/kg, produced a drastic inhibition of sexual behavior when the drug was administered SC 30 min before behavioral observation. Doses below 5 mg/kg were ineffective when given intraperitoneally 15 min before test. When the 5-HT1D/2C receptors were stimulated by the agonist mCPP a reduced number of mounts and ejaculations was observed after the SC administration of 1.25 and 2.5 mg/kg. Similarly, the mixed 5-HT agonist/antagonist lisuride reduced the percentage of rabbits displaying mounting behavior at doses of 0.25 and 0.5 mg/kg SC. All compounds tested produced a clear inhibition of male rabbit sexual behavior independently of the receptor subtype activated. These results are at variance with previous observations in rats where 8-OH-DPAT and lisuride produced a drastic facilitation of masculine coital behavior. Moreover, while the inhibition of male sexual behavior in rats produced by TFMPP and mCPP is associated with a disruption of the execution of this behavior, in rabbits these compounds reduced sexual motivation. These results indicate that the effects of serotonergic drugs on sexual behavior are species specific MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Queretaro MH - Norway PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 7 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0300-9564 UR - ISI:000088415100003 L2 - rabbit;serotonin;sexual behavior;penile anesthesia;RAT EJACULATORY BEHAVIOR; 5-HT1A RECEPTOR; INHIBITORY-ACTION; RHESUS-MONKEYS; MASCULINE; 8-OH-DPAT; AGONISTS; DYSFUNCTION; INVOLVEMENT; STIMULATION SO - Journal of Neural Transmission 2000 ;107(7):767-777 1497 UI - 15072 AU - Park TI AU - Gumbs G AU - Kushwaha MS AD - CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10021, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoGumbs, G, CUNY Hunter Coll, Dept Phys & Astron, 695 Pk Ave, New York, NY 10021 USA TI - Fast-particle energy loss to a quantum well AB - Electron energy loss spectroscopy (EELS) to a single GaAs-AlGaAs quantum well is considered for a charged particle moving parallel to the two-dimensional electron gas (2DEG) within the framework of the random-phase approximation (RPA). For the single-quantum well structure, a modulation-doped GaAs-AlGaAs heterostructure is considered. The Schrodinger-Poisson solver is used to obtain the electron eigenstates. We present theoretical results for the electron energy loss to intersubband and intrasubband plasmons and particle-hole modes using the inverse dielectric function (IDF) formalism. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000089767300007 L2 - electron energy loss spectroscopy;quantum wells;LOSS SPECTROSCOPY; SCATTERING; PHONONS; SURFACES; PLASMA SO - Physica e 2000 ;8(3):248-253 1498 UI - 14684 AU - Parmananda P AU - Rivera M AU - Madrigal R AU - Kiss IZ AU - Gaspar V AD - UAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoUniv Debrecen, Inst Phys Chem, H-4010 Debrecen, HungaryParmananda, P, UAEM, Fac Ciencias, Av Univ 1001,Col Chamilpa, Cuernavaca, Morelos, Mexico TI - Resonant control of electrochemical oscillations AB - We report experimental control of complex (periodic and chaotic) oscillatory dynamics in an electrochemical system by applying a nonfeedback control method. By choosing an appropriate frequency for the periodic modulation of an accessible control parameter (e.g., circuit potential) not only are the chaotic dynamics converted to regular periodic behavior (controlling chaos) but also the character of the oscillatory dynamics is altered (for example, 1(1) --> 1(0)). This is different from previously reported experiments involving simple entrainment of oscillatory dynamics, since in our experiments the frequency of sinusoidal modulation is chosen such that the existing unstable dynamics are targeted and subsequently stabilized. Consequently, the maximum amplitude of the control signal is less than +/-5% of its base value. Since resonant control strategy can be easily implemented without a complicated precontrol procedure it seems relevant for applications to real systems MH - Hungary MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000165868500024 L2 - SELF-CONTROLLING FEEDBACK; CONTROLLING CHAOS; MIXED-MODE; DYNAMICS; SYSTEMS; PERTURBATIONS; STABILIZATION; TRANSITION; ORBITS; LASER SO - Journal of Physical Chemistry B 2000 ;104(49):11748-11751 1499 UI - 15653 AU - Parmentier E AU - Castro-Aguirre JL AU - Vandewalle P AD - Univ Liege, Inst Zool, Lab Funct & Evolut Morphol, B-4020 Liege, BelgiumIPN, Ctr Interdisciplinario Ciencias Marinas, La Paz 23001, Baja California, MexicoParmentier, E, Univ Liege, Inst Zool, Lab Funct & Evolut Morphol, 22 Quai Van Beneden, B-4020 Liege, Belgium TI - Morphological comparison of the buccal apparatus in two bivalve commensal Teleostei, Encheliophis dubius and Onuxodon fowleri (Ophidiiformes, Carapidae) AB - Onuxodon fowleri and Encheliophis dubius are two Carapidae species that live in bivalve hosts and their diet is made of the same type of prey. The aim of this study is to compare their cephalic morphology to see whether: (1) the head anatomy of both species is related to the constraints of their way of life and (2) there are differences between these species and commensal carapids that shelter in other invertebrates. The components of their skeletons and muscles are similar, but differ in size and are arranged differently. In O. fowleri, the buccal cavity is smaller than in E. dubius, the jaws (bearing very large anterior teeth) are larger, the quadratomandibular joint lies further to the rear and the fibres of muscle bundles A(3)alpha, A(2)alpha and A(2)beta are more vertical and insert higher on the neurocranium. The buccal system of O. fowleri appears better suited for ingesting food by biting and grasping. That of E. dubius seems better adapted to a feeding mechanism where sucking would have a more important role. The E. dubius head morphology is more similar to the cephalic anatomy of non-bivalve commensal species than to O. fowlevi features. Diet constraints may have greater influence than the different host constraints on the head construction. A simulated backwards rotation of the posterior part of the E. dubius suspensorium around the posterior joint between the hyomandibular and the neurocranium brings the jaws and the cheeks to coincide with those of O. fowleri. This model could be indicative of how structure modifications and their influences on annex pieces could in part have a role in the biodiversity MH - Belgium MH - Mexico|Baja California PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Anatomy & Morphology;Zoology U5 - J;Article AV - English IS - 0720-213X UR - ISI:000088164600003 L2 - CICHLID FISHES; FEEDING MECHANISM; PISCES; MOVEMENTS; LEPOMIS; JAWS SO - Zoomorphology 2000 ;120(1):29-37 1500 UI - 14841 AU - Parra-Hake M AU - Larter ML AU - Gantzel P AU - Aguirre G AU - Ortega F AU - Somanathan R AU - Walsh PJ AD - Inst Technol, Ctr Grad & Invest, Tijuana 22000, BC, MexicoUniv Calif San Diego, Dept Chem, San Diego, CA 92182, USAUniv Calif San Diego, Dept Chem, La Jolla, CA 92093, USAWalsh, PJ, Univ Penn, 231 S 34th St, Philadelphia, PA 19104, USA TI - Synthesis and structure of dimeric [(cis-Py(3)Im)M](2) complexes [M = Ni, Cu, Zn; (cis-Py(3)Im) = cis-2,4,5-tri(2-pyridyl)imidazoline] AB - A series of dinuclear complexes of the new tetradentate tripyridyl ligand, cis-2,4,5-tri(2-pyridyl)imidazoline, (cis-Py(3)Im), 1, with Ni(II), Cu(II), and Zn(II) is reported. The complexes introduced here are the first prepared of the (cis-Py(3)Im) ligand system and illustrate the preferred binding mode of this ligand to M(II) for M = Ni, Cu, and Zn. Each metal is bonded to two ligands, one through the cis-4,5-(2-pyridyl) groups and the other through the 2(2-pyridyl) and imidazoline nitrogens. [GRAPHICS] MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000165386300032 L2 - RECEPTORS SO - Inorganic Chemistry 2000 ;39(23):5400-+ 1501 UI - 16361 AU - Parra RS AU - George PJ AU - Sanchez GG AU - Gonzalez AEJ AU - Banos L AU - Nair PK AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoKurukshetra Univ, Dept Elect Sci, Kurukshetra 132119, Haryana, IndiaParra, RS, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Optical and electrical properties of Pbs plus In thin films subjected to thermal processing AB - Indium thin film (similar to 20 nm) deposited on intrinsic lead sulfide films leads to the formation of an n-type composite layer when annealed in nitrogen atmosphere at 350-400 degrees C, The formation of metallic lead and indium oxide is observed in the X-ray diffraction patterns of the films. The dark conductivity of the PbS + In films after nitrogen annealing at 400 degrees C attains a value of 500 Omega(-1) cm(-1), which is higher by five orders of magnitude compared with as-prepared PbS films. Modifications in the optical and electrical properties of PbS + In films after annealing are attributed to the presence of metallic lead and indium oxide in the films. (C) 2000 Elsevier Science Ltd. All rights reserved MH - India MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000085859000002 L2 - indium;thin films;optical properties;electrical properties;N-TYPE; CDS SO - Journal of Physics and Chemistry of Solids 2000 ;61(5):659-668 1502 UI - 15274 AU - Partida-Sanchez S AU - Garibay-Escobar A AU - Frixione E AU - Parkhouse RME AU - Santos-Argumedo L AD - IPN, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07738, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Cell Biol, Mexico City 07738, DF, MexicoInst Gulbenkian Ciencia, Dept Immunol, Oeiras, PortugalSantos-Argumedo, L, IPN, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07738, DF, Mexico TI - CD45R, CD44 and MHC class II are signaling molecules for the cytoskeleton-dependent induction of dendrites and motility in activated B cells AB - Anti-CD44 or anti-MHC II antibodies bound to tissue culture plates have previously been shown to induce a dramatic generation of dendritic processes in activated murine B cells. In this study, we demonstrate a similar generation of dendrites and cell motility in activated B cells through CD45R. The dynamic formation of dendritic processes and associated induction of cell motility were analyzed by video microscopy and were characterized by a rapid, and multidirectional emission of dendrites with retractile behavior. The addition of cytochalasin E totally blocked dendrites formation and motility induced through either CD45R, CD44 or MHC II, suggesting that the necessary cytoskeletal rearrangements require active polymerization of actin. Confocal microscopy showed an accumulation of F-actin in the dendrites, as long as cells were elongating. In contrast, G-actin was localized in the perinuclear area and also accumulated in sites where dendrites originated. Preincubation of B cells with staurosporine (a PKC inhibitor) or BAPTA-AM (a calcium chelator) prevented these morphological changes, indicating additionally a requirement for a PKC-calcium-dependent activity. Dendrite formation and cellular motility, therefore, seem to be two manifestations of the same phenomenon, and CD44, CD45R and MHC II appear to be signaling molecules for the observed cytoskeleton-dependent morphological changes MH - Mexico|Distrito Federal MH - Portugal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Immunology U5 - J;Article AV - English IS - 0014-2980 UR - ISI:000089223800034 L2 - B lymphocyte;motility;spreading;T-CELLS; LYMPHOCYTES; ANTIBODIES; PROTEINS; RECEPTOR; DOMAIN SO - European Journal of Immunology 2000 ;30(9):2722-2728 1503 UI - 14486 AU - Passreiter CM AU - Stober S AU - Ortega A AD - Univ Dusseldorf, Inst Pharmazeut Biol, D-40225 Dusseldorf, GermanyNatl Autonomous Univ Mexico, Inst Quim, Coyoacan 04510, DF, MexicoPassreiter, CM, Univ Dusseldorf, Inst Pharmazeut Biol, Univ Str 1, D-40225 Dusseldorf, Germany TI - Furanoheliangolides from leaves of Neurolaena macrocephala AB - Six sesquiterpene lactones, two new (3 and 6) and four known (1, 2, 4 and 5) were isolated from the leaves of the Mexican Neurolaena macrocephala (Asteraceae). The furanoheliangolide 6, containing 4 beta ,5-dihydro-9 alpha -hydroxy-atripliciolide as basic structure, was found for the first time in nature. The chemotaxonomic importance of this phytochemical work is discussed MH - Germany MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000166412500029 L2 - Neurolaena macrocephala;sesquiterpene lactones;furanoheliangolides;SESQUITERPENE LACTONES; MOLECULAR-STRUCTURE; OAXACANA SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2000 ;55(11-12):1026-1029 1504 UI - 14832 AU - Pastor N AU - Weinstein H AU - Jamison E AU - Brenowitz M AD - UAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCUNY Mt Sinai Sch Med, Dept Physiol & Biophys, New York, NY 10029, USAAlbert Einstein Coll Med, Dept Biochem, Bronx, NY 10461, USAPastor, N, UAEM, Fac Ciencias, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - A detailed interpretation of OH radical footprints in a TBP-DNA complex reveals the role of dynamics in the mechanism of sequence-specific binding AB - The hydroxyl radical footprint of the TATA-binding protein (TBP) bound to the high-affinity sequence TATAAAAG of the adenovirus 2 major late promoter has been quantitatively compared to a 2 ns molecular dynamics simulation of the complex in aqueous solution at room temperature using the CHARMM23 potential. The nucleotide-by-nucleotide analysis of the TBP-TATA hydroxyl radical footprint correlates with the solvent-accessible surface calculated from the dynamics simulation. The results suggest that local reactivity towards OH radicals results from the interplay between the local DNA geometry imposed by TBP binding, and the dynamics of the side-chains contacting the sugar hydrogen atoms. Analysis of the dynamics suggests that, over time, TBP forms stable interactions with the sugar-phosphate backbone through multiple contacts to different partners. This mechanism results in an enthalpic advantage to complex formation at a low entropic cost. (C) 2000 Academic Press MH - Mexico|Morelos MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 33 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0022-2836 UR - ISI:000165489600006 L2 - molecular dynamics;entropy/enthalpy compensation;transcription;RNA-POLYMERASE-II; TATA BOX DNA; CRYSTAL-STRUCTURE; MOLECULAR-DYNAMICS; NUCLEIC-ACIDS; HELICOIDAL PARAMETERS; DOUBLE HELIX; PROTEIN; TRANSCRIPTION; PROMOTER SO - Journal of Molecular Biology 2000 ;304(1):55-68 1505 UI - 16566 AU - Pastor N AU - Weinstein H AD - UAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCUNY Mt Sinai Sch Med, Dept Physiol & Biophys, New York, NY 10029, USA TI - The effect of high salt concentration on protein dynamics: Molecular dynamics simulations of the tata box-binding protein in the hyperthermophile P.woesei MH - Mexico|Morelos MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779300263 SO - Biophysical Journal 2000 ;78(1):46A-46A 1506 UI - 16538 AU - Patel A AU - Fuchs GJ AU - Gutierrez-Aceves J AU - ndrade-Perez F AD - Imperial Sch Med, St Marys Hosp, Dept Urol, London W2 1NY, EnglandUniv Calif Los Angeles, Sch Med, Div Endourol, Los Angeles, CA, USAUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoPatel, A, Imperial Sch Med, St Marys Hosp, Dept Urol, Praed St, London W2 1NY, England TI - Transurethral electrovaporization and vapour-resection of the prostate: an appraisal of possible electrosurgical alternatives to regular loop resection MH - United Kingdom MH - Mexico|Jalisco MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1464-4096 UR - ISI:000085241900003 L2 - ROLLERBALL ELECTROVAPORIZATION; FOLLOW-UP; VAPORIZATION; HYPERPLASIA; PATTERNS; TRIAL; FLUID SO - Bju International 2000 ;85(2):202-210 1507 UI - 15476 AU - Paternain GP AD - Fac Ciencias, Ctr Matemat, Montevideo 11400, UruguayPaternain, GP, CIMAT, AP 402, Guanajuato 36000, Mexico TI - Differentiable structures with zero entropy on simply connected 4-manifolds AB - We show that a closed 4-dimensional simply connected topological manifold M admits a differentiable structure with a C-infinity Riemannian metric whose geodesic flow has zero topological entropy if and only if M is homeomorphic to S-4, CP2, S-2. S-2 CP2#<(CP)over bar>(2) or CP2#CP2 MH - Mexico|Guanajuato MH - Uruguay PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0100-3569 UR - ISI:000088648500001 L2 - geodesic flow;entropy;periodic integrals;INTEGRABLE GEODESIC-FLOWS; MANIFOLDS; TOPOLOGY; SPACES SO - Boletim da Sociedade Brasileira de Matematica 2000 ;31(1):1-8 1508 UI - 15294 AU - Pattabi M AU - Uchil J AD - Mangalore Univ, Dept Mat Sci, Mangalagangothri 574199, IndiaPattabi, M, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Synthesis of Cadmium Sulphide nanoparticles AB - Nanoparticles form a link between molecular and bulk state of matter and exhibit size dependent physical and chemical properties. A novel technique of synthesizing nanoparticle films on biological membrane substrates is presented here. Cadmium Sulphide (CdS) nanoparticles were prepared by the chemical reaction of aqueous solutions of Cadmium Acetate and Thiourea. The reacting solutions were allowed to diffuse across the membrane for different periods to control the deposition time. The optical absorption spectra of the membrane after the reaction were recorded with bare membrane as reference. The optical absorption spectra show a clear shift in the absorption edge for films with different deposition times at a fixed concentration. The band gaps calculated from the absorption spectra for films with smaller deposition time were higher than that for the bulk CdS. The particle size, estimated from the band gaps, lie in the nanometer range showing that the particle size and band gap can be tailored by controlling the deposition time and concentration of the precursors. (C) 2000 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 26 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000089095600002 L2 - nanoparticles;CdS;bang gap;egg membrane;CDS; ENERGY SO - Solar Energy Materials and Solar Cells 2000 ;63(4):309-314 1509 UI - 15295 AU - Pattabi M AU - Sebastian PJ AU - Mathew X AU - Bhattacharya RN AD - UNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoNREL, Golden, CO, USAMangalore Univ, Dept Mat Sci, Mangalagangothri 574199, IndiaPattabi, M, UNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Preparation and characterization of copper indium diselenide films by electroless deposition AB - The preparation of copper indium diselenide (CIS) films by electroless deposition technique is reported. The films have been deposited on molybdenum substrates. The deposition bath consisted of aqueous solutions of copper chloride, indium chloride, selenous acid and lithium chloride. The pH of the bath was adjusted to 2.2 by adding dilute HCl. The Mo substrate was short-circuited with the aluminum counter electrode for the electroless deposition. The films have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDXA), inductively coupled plasma spectroscopy (ICP), Auger electron spectroscopy (AES) and optical spectroscopy. The results indicate that reasonable quality CIS films can be grown by simple electroless deposition process followed by recrystallization in selenium atmosphere. (C) 2000 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000089095600003 L2 - CuInSe2;electroless deposition;thin films;polycrystalline solar cells;THIN-FILMS; ELECTRODEPOSITION; CIS SO - Solar Energy Materials and Solar Cells 2000 ;63(4):315-323 1510 UI - 15322 AU - Paul A AU - Odriozola JA AU - San Miguel MA AU - Sanz JF AU - Alvarez LJ AD - Univ Sevilla, Dept Quim Inorgan, CSIC, E-41012 Seville, SpainUniv Sevilla, Inst Ciencia Mat Sevilla, CSIC, E-41012 Seville, SpainUniv Sevilla, Fac Quim, Dept Quim Fis, E-41012 Seville, SpainUniv Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca, Morelos 62210, MexicoPaul, A, Univ Sevilla, Dept Quim Inorgan, CSIC, E-41012 Seville, Spain TI - Experimental and molecular dynamics simulation analysis of lacro(3) precipitation in chromia scales AB - Experimental characterization of grain and grain boundaries of chromia scales upon addition of La has been carried out with a variety of techniques. The effect of lanthanum addition on the high temperature oxidation is explained based on simulations suggested by the experimental results. The grain boundary precipitation mechanism of perovskite phases suggested by our simulations is through the extraction of Cr atoms from the oxide scale. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6454 UR - ISI:000089196700018 L2 - high temperature corrosion;transmission electron microscopy (TEM);grain boundaries;molecular dynamics;computer simulation;GROWTH SO - Acta Materialia 2000 ;48(11):2951-2958 1511 UI - 14785 AU - Pavia EG AD - CICESE, Ensenada, Baja California, MexicoPavia, EG, CICESE, POB 434844, San Diego, CA, USA TI - Secondary forecast models - The ENSO example AB - In this note, a procedure to construct predictors is suggested that could take advantage of the increasing predictive skill of ENSO models. These so-called secondary forecast models (SFM) attempt to produce a forecast for a particular object application based on independent forecasts of ENSO. Although their predictive skill may be modest, these models can provide an alternate and objective forecast to the entirely subjective schemes more widely used. An example of the application of SFM to the forecast of the seasonal precipitation of a typical station of the Mediterranean Californias shows premising results MH - Mexico|Baja California MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0894-8763 UR - ISI:000165594500014 L2 - EL-NINO; RAINFALL; CALIFORNIA; IMPACTS; WEATHER SO - Journal of Applied Meteorology 2000 ;39(11):1952-1955 1512 UI - 15956 AU - Paz JL AU - Recamier J AD - Univ Simon Bolivar, Dept Quim, Caracas 1080, VenezuelaUniv Nacl Autonoma Mexico, Inst Fis, Lab Cuernavaca, Cuernavaca 62251, Morelos, MexicoPaz, JL, Univ Simon Bolivar, Dept Quim, Apartado 89000, Caracas 1080, Venezuela TI - A formalism to study the propagation of the four-wave mixing signal in a strongly driven two-level system immersed in a thermal reservoir AB - We analyze two analytical solutions for the study of the propagation of the four-wave mixing (FWM) signal in a strongly driven two-level system, when the stochastic effects of the solvent are explicitly considered. The first solution is valid only for a constant pump intensity, while the second solution considers pump propagation explicitly. In both cases, we were able to derive analytical expressions for the FWM nonlinear intensity signal in terms of the field amplitude and thermal noise parameters. (C) 2000 Academic Press MH - Mexico|Morelos MH - Venezuela PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical;Spectroscopy U5 - J;Article AV - English IS - 0022-2852 UR - ISI:000087239900001 L2 - propagation;four-wave mixing;stochastic;OPTICAL BLOCH EQUATIONS; FREE-INDUCTION DECAY; 2-LEVEL SYSTEM; ATOMS; FIELD; RELAXATION; SOLIDS SO - Journal of Molecular Spectroscopy 2000 ;201(2):179-187 1513 UI - 14874 AU - Peacock JA AU - Rowan-Robinson M AU - Blain AW AU - Dunlop JS AU - Efstathiou A AU - Hughes DH AU - Jenness T AU - Ivison RJ AU - Lawrence A AU - Longair MS AU - Mann RG AU - Oliver SJ AU - Serjeant S AD - Univ Edinburgh, Royal Observ, Astron Inst, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, EnglandUniv Cambridge, Cavendish Lab, Cavendish Astrophys Grp, Cambridge CB3 0HE, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoJoint Astron Ctr, Hilo, HI 96720, USAUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Sussex, CPES, Brighton BN1 9QH, E Sussex, EnglandPeacock, JA, Univ Edinburgh, Royal Observ, Astron Inst, Edinburgh EH9 3HJ, Midlothian, Scotland TI - Starburst galaxies and structure in the submillimetre background towards the Hubble Deep Field AB - We use an 850-mum SCUBA map of the Hubble Deep Field (HDF) to study the dust properties of optically-selected starburst galaxies at high redshift. The optical/infrared (IR) data in the HDF allow a photometric redshift to be estimated for each galaxy, together with an estimate of the visible star-formation rate. The 850-mum flux density of each source provides the complementary information: the amount of hidden, dust-enshrouded star formation activity. Although the 850-mum map does not allow detection of the majority of individual sources, we show that the galaxies with the highest UV star-formation rates are detected statistically, with a flux density of about S-850 = 0.2 mJy for an apparent UV star-formation rate of 1 h(-2) M. yr(-1). This level of submillimetre output indicates that the total star-forming activity is on average a factor of approximately 6 times larger than the rate inferred from the UV output of these galaxies, The general population of optical starbursts is then predicted to contribute at least 25 per cent of the 850-mum background. We carry out a power-spectrum analysis of the map, which yields some evidence for angular clustering of the background source population, but at a level lower than that seen in Lyman-break galaxies. Together with other lines of argument, particularly from the NICMOS HDF data, this suggests that the 850-mum background originates over an extremely wide range of redshifts - perhaps 1 less than or similar to z less than or similar to 6 MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 59 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000165325100025 L2 - galaxies : evolution;galaxies : starburst;cosmology : observations;ULTRAVIOLET LUMINOSITY DENSITY; HIGH-REDSHIFT GALAXIES; LYMAN-BREAK GALAXIES; STAR-FORMATION; DATA REDUCTION; PHOTOMETRY; EVOLUTION; Z-SIMILAR-TO-3; POPULATION; SPECTRUM SO - Monthly Notices of the Royal Astronomical Society 2000 ;318(2):535-546 1514 UI - 14726 AU - Pech-Canul MI AU - Makhlouf MM AD - Worcester Polytech Inst, Dept Mech Engn, Worcester, MA 01609, USAPech-Canul, MI, CINVESTAV, Carr Saltillo Mty Km 13,Apdo Postal N 663, Saltillo 25000, Coahuila, Mexico TI - Processing of Al-SiCp metal matrix composites by pressureless infiltration of SiCp preforms AB - An optimum method for producing Al-SiCp metal matrix composites was developed by determining the optimum conditions for wetting SiC by aluminum and the optimum parameters for pressureless infiltration of SiCp preforms. The quantitative effect of magnesium and silicon additions to aluminum, free silicon on the SiC substrate, nitrogen gas in the atmosphere, and process temperature on the wetting characteristics of SiC by aluminum alloys was investigated using the sessile drop technique. The contribution of each of these parameters and their interactions, in terms of a relative power, to the contact angle, surface tension, and driving force for wetting were determined. In addition, an optimized process for enhanced wetting was suggested and validated. The optimum conditions for wetting SiC by aluminum that were arrived at were used to infiltrate SiCp preforms and the mechanical properties of the resulting metal matrix composites were measured. The effect of SiC particle size, infiltration time, preform height, vol.% SiC in the preform, and Si coating on the SiC particles on the pressureless infiltration of SiCp compacts with aluminum was investigated and quantified. The contribution of each of these parameters and their interactions to the retained porosity in the composite, the modulus of elasticity, and the modulus of rupture were determined. Under optimum infiltration conditions, metal matrix composites with less than 3% porosity, over 200 GPa modulus of elasticity, and about 300 MPa modulus of rupture were routinely produced.An optimum method for producing Al-SiCp metal matrix composites was developed by determining the optimum conditions for wetting SiC by aluminum and the optimum parameters for pressureless infiltration of SiCp preforms. The quantitative effect of magnesium and silicon additions to aluminum, free silicon on the SiC substrate, nitrogen gas in the atmosphere, and process temperature on the wetting characteristics of SiC by aluminum alloys was investigated using the sessile drop technique. The contribution of each of these parameters and their interactions, in terms of a relative power, to the contact angle, surface tension, and driving force for wetting were determined. In addition, an optimized process for enhanced wetting was suggested and validated. The optimum conditions for wetting SiC by aluminum that were arrived at were used to infiltrate SiCp preforms and the mechanical properties of the resulting metal matrix composites were measured. The effect of SiC particle size, infiltration time, preform height, vol.% SiC in the preform, and Si coating on the SiC particles on the pressureless infiltration of SiCp compacts with aluminum was investigated and quantified. The contribution of each of these parameters and their interactions to the retained porosity in the composite, the modulus of elasticity, and the modulus of rupture were determined. Under optimum infiltration conditions, metal matrix composites with less than 3% porosity, over 200 GPa modulus of elasticity, and about 300 MPa modulus of rupture were routinely produced MH - Mexico|Coahuila MH - USA PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1064-7562 UR - ISI:000165739900006 L2 - Al MMCs;wettability;pressureless infiltration;SiCp preforms;modulus of elasticity;modulus of rupture;LIQUID ALUMINUM-ALLOYS; INTERFACIAL REACTIONS; CHEMICAL INTERACTION; SILICON-CARBIDE; WETTABILITY; MG; FABRICATION; AL2O3 SO - Journal of Materials Synthesis and Processing 2000 ;8(1):35-53 1515 UI - 16528 AU - Pech-Canul MI AU - Katz RN AU - Makhlouf MM AD - Ctr Res & Adv Sci, Saltillo 25000, Coahuila, MexicoWorcester Polytech Inst, Dept Mech Engn, Aluminum Casting Res Lab, Worcester, MA 01609, USAPech-Canul, MI, Ctr Res & Adv Sci, Carr Saltillo Mty Km 13, Saltillo 25000, Coahuila, Mexico TI - Optimum parameters for wetting silicon carbide by aluminum alloys AB - The effect of magnesium and silicon additions to aluminum, free silicon on the SiC substrate, nitrogen gas in the atmosphere, and process temperature on the wetting characteristics of SIC by aluminum alloys are investigated using the sessile drop technique. The contribution of each of these parameters and their interactions to the contact angle, surface tension, and driving force for wetting are determined. In addition, an optimized process for enhanced wetting is suggested and validated. Results show that the presence of free silicon on the surface of SiC significantly reduces the contact angle between the molten alloy and the substrate, The positive effect of silicon on the contact angle is attributed to a chemical reaction in which both SiC and aluminum are active participants. The results also indicate that nitrogen gas in the atmosphere positively influences the liquid/vapor surface tension, and the presence of magnesium in the aluminum alloy favorably affects the overall driving force for wetting. A mechanism is proposed to explain the beneficial role that the interaction of nitrogen with magnesium plays in enhancing wetting. Magnesium significantly reduces the surface tension of aluminum melts but has a low vapor pressure. Consequently, it readily volatilizes during holding at the processing temperature and is lost from the alloy. It is proposed that a series of chemical reactions in the system Al-Mg-N are responsible for reintroducing magnesium into the melt, thus, maintaining a low melt surface tension. Interactions between the aluminum alloy and the silicon carbide substrate that may lead to the dissolution of the substrate and the formation of undesirable reaction products, particularly Al4C3, are examined, and means for mitigating their formation are outlined MH - Mexico|Coahuila MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 24 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000085248700024 L2 - METAL-MATRIX COMPOSITES; LIQUID ALUMINUM; PRESSURE INFILTRATION; CHEMICAL INTERACTION; WETTABILITY SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2000 ;31(2):565-573 1516 UI - 15171 AU - Pecina V AU - Alvarado MD AU - Alanis HW AU - Almaraz RD AU - Vandemark GJ AD - USDA ARS, IAREC, Prosser, WA 99350, USAIPN, Ctr Invest & Estudios Avanzados, Irapuato 36500, Guanajuato, MexicoINIFAP, Campo Expt Rio Bravo, Rio Bravo 88900, Tam, MexicoUNAM, ENEP, Microbiol Lab, Iztacala 31130, Mexico, MexicoVandemark, GJ, USDA ARS, IAREC, 24106 N Bunn Rd, Prosser, WA 99350, USA TI - Detection of double-stranded RNA in Macrophomina phaseolina AB - One hundred ten isolates of Macrophomi na phaseolina, the causal agent of charcoal rot of many different plant species, were obtained from Mexico, Somalia, and several locations in the United States, and analyzed for the presence of double-stranded RNA (dsRNA). Twenty-one isolates from the United States and Mexico contained dsRNA elements. The sizes of the dsRNAs ranged from ca 0.4 kbp to 10 kbp and the number of dsRNAs present among the isolates ranged from one to ten. Attempts to detect virus particles by sucrose gradient centrifugation were unsuccessful. Three isolates having dsRNA and three dsRNA-free isolates were evaluated for virulence on sorghum at two different field locations and for mycelial growth in PDA and V8 agar. For both locations, the isolates that had dsRNA were significantly less virulent (P < 0.05) than the dsRNA-free isolates. Differences between locations were not significant (P < 0.05). The contrasts between means of isolates with and without dsRNA suggest a strong association between the presence of dsRNA and a reduction in both mycelial growth and the capacity to cause disease. These results suggest an association between the presence of dsRNA and hypovirulence in the fungus MH - Mexico|Guanajuato MH - Mexico|Estado De Mexico MH - Mexico|Tamaulipas MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000089511200011 L2 - charcoal rot;dsRNA;hypovirulence;Sorghum bicolor;ENDOGLUCANASE-ENCODING GENE; DSRNA-CONTAINING STRAINS; ENDOTHIA-PARASITICA; HYPOVIRULENCE; PLANT; COMPONENTS; RESISTANCE; VIRULENCE; SORGHUM SO - Mycologia 2000 ;92(5):900-907 1517 UI - 15097 AU - Peimbert M AU - Peimbert A AU - Ruiz MT AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Chile, Dept Astron, Santiago, ChilePeimbert, M, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - The chemical composition of the small magellanic cloud HII region NGC 346 and the primordial helium abundance AB - Spectrophotometry in the lambda lambda 3400-7400 range is presented for 13 areas of the brightest H II region in the SMC: NGC 346. The observations were obtained at CTIO with the 4 m telescope. Based on these observations, its chemical composition is derived. The helium and oxygen abundances by mass are given by Y(SMC) = 0.2405 + 0.0018 and O(SMC)= 0.00171 +/- 0.00025. From models and observations of irregular and blue compact galaxies it is found that Delta Y/Delta O = 3.5 +/- 0.9 and, consequently, that the primordial helium abundance by mass is given by Y-p = 0.2345 +/- 0.0026 (1 sigma). This result is compared with values derived from big bang nucleosynthesis and with other determinations of Y-p MH - Chile MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 96 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089825000016 L2 - galaxies : abundances;galaxies : individual (Small Magellanic Cloud);galaxies : ISM;HII regions;ISM : abundances magellanic clouds;RECOMBINATION-LINE-INTENSITIES; BLUE COMPACT GALAXIES; H-II REGIONS; HYDROGENIC IONS; GASEOUS NEBULAE; EVOLUTION; STARS; EXTINCTION; SPECTRA; DENSITY SO - Astrophysical Journal 2000 ;541(2):688-700 1518 UI - 16190 AU - Peithmann K AU - Korneev N AU - Flaspohler M AU - Buse K AU - Kratzig E AD - Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, GermanyINAOE, Dept Opt, Puebla 72000, MexicoPeithmann, K, Univ Osnabruck, Fachbereich Phys, Barbarastr 7, D-49069 Osnabruck, Germany TI - Investigation of small polarons in reduced iron-doped lithium-niobate crystals by non-steady-state photocurrent techniques MH - Germany MH - Mexico|Puebla PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000086440500001 L2 - GRATINGS; LINBO3 SO - Physica Status Solidi A-Applied Research 2000 ;178(1):R1-R3 1519 UI - 16001 AU - Peng LM AU - Aragon JL AD - Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing Lab Electron Microscopy, Beijing 100080, Peoples R ChinaChinese Acad Sci, Inst Phys, Beijing 100080, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoPeng, LM, Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing Lab Electron Microscopy, POB 2724, Beijing 100080, Peoples R China TI - Foreword - Electron microscopy of aperiodic materials - Invited and contributed papers from a symposium at the ICEM14, Cancun, Mexico, 3 September 1998, in honour of Professor K.H. Kuo MH - Mexico|Distrito Federal MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Microscopy U5 - J;Editorial Material AV - English IS - 0968-4328 UR - ISI:000087050100001 SO - Micron 2000 ;31(5):457-458 1520 UI - 16392 AU - Pereyra P AU - Ulloa SE AD - Ohio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAUniv Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Mexico City 02200, DF, MexicoPereyra, P, Ohio Univ, Dept Phys & Astron, Athens, OH 45701, USA TI - Magnetic-field and quantum confinement asymmetry effects on excitons AB - A theoretical analysis and calculation of the excitonic states in asymmetric quantum dots is carried out in the presence of magnetic fields. The lack of rotational symmetry, introduced by strains and structural factors, produces splittings of the excitonic states with corresponding consequences on the optical oscillator strengths and polarization dependence. For example, we find that the asymmetry produces Zeeman splittings that are smaller than those for symmetric dots at small fields, which could be used as an additional diagnostic of the geometry of the structure. We focus our calculations on naturally occurring quantum dots due to layer fluctuations in narrow quantum wells. Moreover, we observe that increasing magnetic fields produce an interesting crossover to pure angular momentum states for all the excitonic eigenstates, regardless of the degree of asymmetry of the dots and their size. Explicit calculations of photoluminescence excitation yields are presented and related to the different degrees of freedom of the system MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000085760200081 L2 - DOTS; PHOTOLUMINESCENCE; SPECTROSCOPY; LUMINESCENCE; STATES; GAAS; SCATTERING; BOXES SO - Physical Review B 2000 ;61(3):2128-2137 1521 UI - 14742 AU - Perez-Castaneda R AU - Defeo O AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97310, Yucatan, MexicoUniv Autonoma Tamaulipas, Ctr Invest Social, Ciudad Victoria 87000, Tamaulipas, MexicoFac Ciencias, UNDECIMAR, Montevideo 11400, UruguayDefeo, O, IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, AP 73 Cordexex, Merida 97310, Yucatan, Mexico TI - Population structure of the penaeid shrimp Farfantepenaeus notialis in its new range extension for the Gulf of Mexico MH - Mexico|Tamaulipas MH - Mexico|Yucatan MH - Uruguay PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000165750900014 SO - Bulletin of Marine Science 2000 ;67(3):1069-1074 1522 UI - 16038 AU - Perez-Gonzalez J AU - de Vargas L AU - Pavlinek V AU - Hausnerova B AU - Saha P AD - Tech Univ Brno, Fac Technol Zlin, Zlin 76272, Czech RepublicInst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07300, DF, MexicoPavlinek, V, Tech Univ Brno, Fac Technol Zlin, Zlin 76272, Czech Republic TI - Temperature-dependent instabilities in the capillary flow of a metallocene linear low-density polyethylene melt AB - The capillary flow behavior of a metallocene linear low-density polyethylene was studied in a wide temperature range. The critical shear stress for the onset of the unstable spurt flow was found to be dependent on temperature in a nonlinear fashion and it showed a minimum value at a critical temperature, at which unusually long period pressure oscillations were observed. For temperatures above the critical one, the observed decrease of the critical shear stress with decreasing temperature is explained on the basis of an increase in the distance between entanglements. At temperatures below the critical one, the increase in the critical shear stress and the eventual suppression of pressure oscillations as the temperature is further decreased are suggested to be the result of a flow-induced phase change that ends on complete crystallization and suppression of flow. The flow-induced crystallization phenomenon and the extrudate quality were dependent on the contraction ratio. Elimination of surface extrudate distortions took place at low temperatures when using a contraction ratio of 30, this fact can be attributed to the flow-induced phase change. Finally, a decrease in the activation energy for flow or "easy flow" was observed at temperatures below the critical one. Such ''easy flow'' is perhaps the precursor of the ''temperature window'' of low-flow resistance reported by Keller and co-workers [Kolnaar, J. W. H. and A. Keller, Polymer 35, 3863-3874 (1994); Waddon, A. J. and A. Keller, J. Polym. Sci. Polym. Part B: Polym. Phys. 28, 1063-1073 (1990)]. (C) 2000 The Society of Rheology. [S0148-6055(00)00203-0] MH - Czech Republic MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Mechanics U5 - J;Article AV - English IS - 0148-6055 UR - ISI:000086966000001 L2 - STICK-SLIP TRANSITION; WALL SLIP; RESISTANCE; EXTRUSION; WINDOW SO - Journal of Rheology 2000 ;44(3):441-451 1523 UI - 16487 AU - Perez-Harguindeguy N AU - Diaz S AU - Cornelissen JHC AU - Vendramini F AU - Cabido M AU - Castellanos A AD - Univ Nacl Cordoba, CONICET, Inst Multidisciplinario Biol Vegetal, RA-5000 Cordoba, ArgentinaUniv Sheffield, Dept Anim & Plant Sci, Unit Comparat Plant Ecol, Sheffield S10 2TN, S Yorkshire, EnglandUniv Sheffield, Dept Anim & Plant Sci, Sheffield Ctr Arctic Ecol, Sheffield S10 2TN, S Yorkshire, EnglandUniv Sonora, Dept Invest Cient & Tecnol, Hermosillo, Sonora, MexicoPerez-Harguindeguy, N, Univ Nacl Cordoba, CONICET, Inst Multidisciplinario Biol Vegetal, CC 495, RA-5000 Cordoba, Argentina TI - Chemistry and toughness predict leaf litter decomposition rates over a wide spectrum of functional types and taxa in central Argentina AB - Litter decomposition, a major determinant of ecosystem functioning, is strongly influenced by the litter quality of different species. We aimed at (1) relating interspecific variation in leaf litter decomposition rate to the functional types different species belong to; and (2) understanding the chemical and/or physical basis for such variation and its robustness to environmental factors. We selected 52 Angiosperms from a climatic gradient in central-western Argentina, representing the widest range of functional types and habitats published so far. Ten litter samples of each species were simultaneously buried for 9 weeks during the 1996 summer in an experimental decomposition bed. Decomposition rate was defined as the percentage of dry mass loss after incubation. Chemical litter quality was measured as carbon (C) content, nitrogen (N) content, and C-to-N ratio. Since tensile strength of litter and living leaves were strongly correlated, the latter was chosen as an indicator of physical litter quality. A subset of 15 species representing different functional types was also incubated in England for 15 weeks, following a similar experimental procedure. Litter C-to-N and leaf tensile strength of the leaves showed the strongest negative associations with decomposition rate, both at the species and at the functional-type level. Decomposition rates of the same species in Argentina and in England were strongly correlated. This reinforces previous evidence that species rankings in terms of litter decomposition rates are robust to methodological and environmental factors. This paper has shown new evidence of plant control over the turnover of organic matter through litter quality, and confirms, over a broad spectrum of functional types, general models of resource allocation. The strong correlations between leaf tensile strength - a trait that is easy and quick to measure in a large number of species - decomposition rate, and C-to-N ratio indicate that leaf tensile strength can be useful in linking plant quality to decomposition patterns at the ecosystem level MH - Argentina MH - United Kingdom MH - Mexico|Sonora PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 47 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000085307600003 L2 - carbon;functional types;leaf tensile strength;litter quality;mass loss;nitrogen;ECOSYSTEM FUNCTION; TERRESTRIAL ECOSYSTEMS; GLOBAL CHANGE; QUALITY; CLIMATE; BIODIVERSITY; DIVERSITY; NITROGEN; DEFENSE; PLANTS SO - Plant and Soil 2000 ;218(1-2):21-30 1524 UI - 16534 AU - Perez-Lorenzana A AU - Ponce WA AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAIPN, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Antioquia, Dept Fis, Medellin, ColombiaPerez-Lorenzana, A, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - GUTs and string-GUTs AB - We look for a connection between string theories and Grand Unified Theories (GUTs), with the aim to look for new insights: in the existing four dimensional string-GUT problems. We argue that the construction of consistent string-GUT models could require the use of non-canonical affine levels. We list the most common level values related to realistic GUTs MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000085195200004 L2 - NON-SUSY; UNIFICATION; GAUGE; ELECTROWEAK; MODEL; FAMILIES; FORCES SO - Europhysics Letters 2000 ;49(3):296-301 1525 UI - 14924 AU - Perez-Marin L AU - Castro M AU - Otazo-Sanchez E AU - Cisneros GA AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, DEPg, Mexico City 04510, DF, MexicoInst Nacl Invest Nucl, Ocoyoacac 52045, MexicoUniv La Habana, Inst Mat & React, Habana 10400, CubaCastro, M, Natl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, DEPg, Mexico City 04510, DF, Mexico TI - Density functional study of molecular recognition and reactivity of thiourea derivatives used in sensors for heavy metal polluting cations AB - The geometry and electronic structure of four thiourea derivatives, 1,3-diphenylthiourea, 1-furoyl-3-phenylthiourea, 1-furoyl-3-bencyl-3-phenylthiourea, and 1-furoyl-3-hydroxyethylthiourea, were determined by means of the DGauss program, which is a density functional theory based method. Calculations performed were of the all-electron type at the local spin density level of theory. Orbital basis sets of DZVP2 quality were used for the H, C, N, O, and S atoms. The frontier molecular orbitals were characterized. They account for the observed selectivity of these molecules toward the following cations: Pb2+, Hg2+, Cd2+, Ag+, Cu2+, Ni2+, Zn2+, and Mn2+. Moreover, the localization of the highest occupied molecular orbital coupled with a high negative charge over the sulfur center accounts for the softness of the active sulfur site. Indeed, a metal-sulfur interaction is mainly responsible for the observed electrochemical behaviors in ion-selective electrodes toward the different cations. These results agree with the estimated softness reported previously for these cations. Our calculations explain the observed differences of reactivity for these neutral carriers through their interactions with heavy metal cations. (C) 2000 John Wiley & Sons, Inc MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000165108300009 L2 - DFT calculations;reactivity of molecules;thiourea derivatives;ion-selective electrodes;ION-SELECTIVE ELECTRODES; BULK OPTODES; ELECTRONEGATIVITY SO - International Journal of Quantum Chemistry 2000 ;80(4-5):609-622 1526 UI - 15196 AU - Perez-Marin L AU - Otazo-Sanchez E AU - edo-Miranda G AU - vila-Perez P AU - Chamaro JA AU - Lopez-Valdivia H AD - Inst Nacl Invest Nucl, Dept Estudios Ambiente, Mexico City, DF, MexicoUniv La Habana, Inst Mat & React, Havana 10400, CubaUniv Autonoma Estado de Hidalgo, Ctr Invest Quim, Pachuca 42035, MexicoUniv Autonoma Barcelona, Grp Sensores & Biosensores, E-08193 Barcelona, SpainPerez-Marin, L, Inst Nacl Invest Nucl, Dept Estudios Ambiente, Amsterdam 46,Despacho 202,Colonia Hipodromo Conde, Mexico City, DF, Mexico TI - Mercury(II) ion-selective electrode. Study of 1,3-diphenylthiourea as ionophore AB - A new liquid membrane, mercury(ii) ion-selective electrode (ISE) based on 1,3-diphenylthiourea as a neutral carrier was developed. In solubility tests of 1,3-diphenylthiourea in six different plastizicers, tris(2-ethylhexyl) phosphate (TEHP) showed the best performance and was selected for the membrane. Several ISEs were conditioned and tested for the selection of seven metal ions (Hg2+, Cu2+, Zn2+, Pb2+, Ca2+, Mg2+ and Ag+). The best Nernstian response was obtained for Hg2+ with an experimental slope of 58.6 +/- 0.8 mV per decade in the concentration range 6.0 x 10(-6)-5.0 x 10(-4) mol l(-1); the presence of the complex Hg(OH)(+) ion explains the slope of the response curve. The ISE showed stable detection reproducibility during 6 weeks, with a practical detection limit of 10(-6) mol dm(-3) and a high selectivity for Cd2+, Pb2+, Co2+, Cu2+, Sr2+, Zn2+, Ca2+, Mg2+, Mn2+, K+, Na+ and NH4+ ions. Only one interference for Ag+ was found. A second linear response curve for Hg2+ was obtained at pH 4 with a slope of 30.8 mV per decade in the concentration range 2.0 x 10(-6)-2.1 x 10(-4) mol l(-1) MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2654 UR - ISI:000089550500017 L2 - LIQUID MEMBRANE; NEUTRAL-CARRIER; RESPONSE CHARACTERISTICS; BULK OPTODES; CROWN ETHERS; MATRIX; COEFFICIENTS; CHLORIDE; LEAD(II) SO - Analyst 2000 ;125(10):1787-1790 1527 UI - 15180 AU - Perez-Martinez X AU - Vazquez-Acevedo M AU - Tolkunova E AU - Funes S AU - Claros MG AU - Davidson E AU - King MP AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoThomas Jefferson Univ, Dept Mol Pharmacol & Biochem, Philadelphia, PA 19107, USAUniv Malaga, Fac Ciencias, Dept Biol Mol & Bioquim, E-29071 Malaga, SpainGonzalez-Halphen, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-243, Mexico City 04510, DF, Mexico TI - Unusual location of a mitochondrial gene - Subunit III of cytochrome c oxidase is encoded in the nucleus of chlamydomonad algae AB - The algae of the family Chlamydomonadaceae lack the gene cox3 that encodes subunit III of cytochrome c oxidase in their mitochondrial genomes. This observation has raised the question of whether this subunit is present in cytochrome c oxidase or whether the corresponding gene is located in the nucleus. Cytochrome c oxidase was isolated from the colorless chlamydomonad Polytomella spp., and the existence of subunit III was established by immunoblotting analysis with an antibody directed against Saccharomyces cerevisiae subunit III. Based partly upon the N-terminal sequence of this subunit, oligodeoxynucleotides were designed and used for polymerase chain reaction amplification, and the resulting product was used to screen a cDNA library of Chlamydomonas reinhardtii. The complete sequences of the cox3 cDNAs from Polytomella spp. and C. reinhardtii are reported. Evidence is provided that the genes for cox3 are encoded by nuclear DNA, and the predicted polypeptides exhibit diminished physical constraints for import as compared with mitochondrial-DNA encoded homologs. This indicates that transfer of this gene to the nucleus occurred before Polytomella diverged from the photosynthetic Chlamydomonas lineage and that this transfer may have occurred in all chlamydomonad algae MH - Mexico|Distrito Federal MH - Spain MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 30 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000089577900033 L2 - IRON-SULFUR PROTEIN; COMPLETE SEQUENCE; APOCYTOCHROME-B; CDNA SEQUENCE; GENOME ORGANIZATION; HEART-MITOCHONDRIA; MEMBRANE-PROTEINS; RIBOSOMAL-RNAS; ALPHA-SUBUNIT; BC(1) COMPLEX SO - Journal of Biological Chemistry 2000 ;275(39):30144-30152 1528 UI - 15503 AU - Perez-Mendoza J AU - Fabrick JA AU - Zhu KY AU - Baker JE AD - ARS, Grain Mkt & Prod Res Ctr, USDA, Manhattan, KS 66502, USAPerez-Mendoza, J, Agustin Lanuza 118,Zona de Oro 1, Guanajuato 38020, Mexico TI - Alterations in esterases are associated with malathion resistance in Habrobracon hebetor (Hymenoptera : Braconidae) AB - Biochemical mechanisms of malathion resistance were investigated in a malathion-resistant strain of the parasitoid Habrobracon hebetor Say collected from a farm storage in Kansas. General esterase activities were significantly lower in the resistant strain compared with those in a susceptible strain. However, no significant differences were found in activities of malathion specific carboxylesterase (MCE),glutathione S-transferase and cytochrome P450 dependent O-demethylase activities, cytochrome P450 contents, and sensitivity of acetylcholinesterase to inhibition by malaoxon between the 2 strains. Because MCE was not elevated in the resistant strain, the weak malathion resistance in H, hebetor may result from a different mechanism compared with that hypothesized for some insect species in which reduced general esterase activity is accompanied by an elevated MCE. Decreased. esterase activity in the resistant strain suggested that null alleles of some esterases were associated, with the resistance. Indeed, E1 and E2, major esterases in the susceptible strain, were not present in the resistant strain on polyacrylamide gels that were stained for esterase activity using the model substrate 1-naphthyl acetate. In contrast, the activity of esterase E3 on the gels was much higher in the resistant strain as compared with that of the susceptible strain. These findings indicate that malathion resistance in H, hebetor is associated with both an increased activity of the esterase E3 and null alleles of the esterases E1 and E2 MH - Mexico|Guanajuato MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000088598600006 L2 - parasitoid;resistance;insecticide;detoxification;PARASITOID ANISOPTEROMALUS-CALANDRAE; INSECTICIDE RESISTANCE; LUCILIA-CUPRINA; PROBIT ANALYSIS; FIELD STRAINS; UNITED-STATES; CARBOXYLESTERASE; PTEROMALIDAE; LEPIDOPTERA; HOMOPTERA SO - Journal of Economic Entomology 2000 ;93(1):31-37 1529 UI - 16390 AU - Perez-Rodriguez F AU - Makarov NM AU - Yevtushenko O AU - Panchekha A AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoNatl Acad Sci Ukraine, Inst Radiophys & Elect, UA-310085 Kharkov, UkraineCUNY Queens Coll, Dept Phys, Flushing, NY 11367, USAYevtushenko, O, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Multi-fractal properties of the nonlinear electromagnetic response of irreversible type-II superconductors AB - Using the Grassberger-Procaccia method for calculating correlation dimension D-2, we show that the nonlinear response of a hard superconductor to an external two-harmonic magnetic field possesses multi-fractal properties. The response is described in the frame of the Bean critical-state model. The number of attractors in the reconstructed phase-space of the response depends on the ratio Omega of the harmonic frequencies. D-2 increases as Omega becomes irrational, indicating a transition of the superconductor to the chaotic regime. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - Ukraine MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000085767700029 L2 - superconductivity;flux pinning;critical state;correlation dimension;dynamical chaos;CRITICAL-STATE MODEL; CORRELATION DIMENSION; HARD SUPERCONDUCTORS; STRANGE ATTRACTORS; CRITICAL CURRENTS; TIME-SERIES; GEOMETRY; CHAOS SO - Physics Letters A 2000 ;266(4-6):409-413 1530 UI - 15586 AU - Perez-Samartin AL AU - Miledi R AU - Arellano RO AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, MexicoUniv Pais Vasco, Dept Neurociencias, Leioa 48940, Vizcaya, SpainUniv Calif Irvine, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USAArellano, RO, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Apartado Postal 1-1141, Queretaro 76001, Mexico TI - Activation of volume-regulated Cl- channels by ACh and ATP in Xenopus follicles AB - 1. Osmolarity-dependent ionic currents from follicle-enclosed Xenopus oocytes (follicles) were studied using electrophysiological techniques. Whole follicle currents were monitored using a two-electrode voltage clamp and single-channel activity was measured using the patch-clamp technique. 2. In follicles held at -60 mV two chloride currents were activated in external hyposmotic solutions. One was the habitual volume-regulated current elicited by external hyposmolarity (I-Cl,I-swell), and the second was a slow and smooth current (S-in) generated by BCh or ATP application. 3. In follicles, the permeability ratios for different anions with respect to Cl- were similar for both I-Cl,I-swell and S-in, with a sequence of: SCN- > I- > Br- greater than or equal to NO3- greater than or equal to Cl- > gluconate greater than or equal to cyclamate > acetate > SO42-. 4. Extracellular ATP blocked the outward component of S-in. Also, extracellular pH modulated the inactivation kinetics of S-in elicited by ACh; e.g. inactivation at +80 mV was similar to 100% slower at pH 8.0 compared with that at pH 6.0. 5. Lanthanides inhibited I-Cl,I-swell and S-in. La3+ completely inhibited I-Cl,I-swell with a half-maximal inhibitory concentration (IC50) of 17 +/- 1.9 mu M, while S-in was blocked up to 55% with an apparent IC50 of 38 +/- 2.6 mu M. 6. Patch-clamp recordings in follicular cells showed that hyposmotic challenge opened inward single-channel currents. The single channel conductance (4.7 +/- 0.4 pS) had a linear current-voltage relationship with a reversal membrane potential close to -20 mV. This single-channel activity was increased by application of ACh or ATP. 7. The I-Cl,I-swell generation was not affected by pirenzepine or metoctramine, and did not affect the purinergic activation of the chloride current named F-in. Thus; I-Cl,I-swell was not generated via neurotransmitters released during cellular swelling. 8. All together, equal discrimination for different anions, similar modulatory effects by extracellular pH, the blocking effects by ATP and La3+, and the same single-channel activity, strongly suggest that I-Cl,I-swell and S-in currents depend on the opening of the same type or a closely related class of volume-regulated chloride channels MH - Mexico|Queretaro MH - Spain MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000088320300014 L2 - SENSITIVE ANION CONDUCTANCE; ACETYLCHOLINE-RECEPTORS; CHLORIDE CONDUCTANCE; RANA-TEMPORARIA; PRIMATE OVARY; CELL-LINE; OOCYTES; MEMBRANE; CURRENTS; LAEVIS SO - Journal of Physiology-London 2000 ;525(3):721-734 1531 UI - 14544 AU - Perez-Silva E AU - Esqueda M AU - Herrera T AU - Moreno G AU - Altes A AD - UNAM, Inst Biol, Lab Micol, Mexico City 04510, DF, MexicoCtr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Alcala de Henares, Dept Biol Vegetal, E-28871 Alcala De Henares, SpainPerez-Silva, E, UNAM, Inst Biol, Lab Micol, Apartado Postal 70-233,Coyoacan, Mexico City 04510, DF, Mexico TI - Disciseda verrucosa (gasteromycetes) in Mexico AB - The presence of Disciseda verrucosa in the American continent (Mexico) is confirmed. Material previously recorded and new collections are described micro- and macroscopically, and were compared with the holotype. Photomicrographs under SEM are provided MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 3 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000166131700036 L2 - Lycoperdales;chorology;taxonomy SO - Mycotaxon 2000 ;76():337-341 1532 UI - 15461 AU - Perez JLJ AU - Sakanaka PH AU - Algatti MA AU - Mendoza-Alvarez JG AU - Orea AC AD - IPN, CICATA, Mexico City 11500, DF, MexicoUniv Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, BrazilIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoPerez, JLJ, IPN, CICATA, Legaria 694, Mexico City 11500, DF, Mexico TI - Theoretical modelling of oxide thin film growth by pulsed laser sources AB - This paper considers theoretical modelling and experimental investigation of TiO2 Nm growth on Ti films previously deposited on glass substrates. The Ti oxidation occur; due to film surface heating by a moving beam of a pulsed Nd:YAG laser that sweeps the surface at a constant speed of 2 mm/s, under atmospheric environment. The model takes into account the self-consistent solutions of the three-dimensional heat diffusion and oxidation rate equations. Numerical results obtained for 100 and 200 pulses of 290 ns and 3.17 MW/cm(2) with a repetition frequency of 100 and 200 Hz, showed that maximum temperatures of approximately 850 and 1200 K are reached after the action of the fiftieth pulse. The occurrence of surface cooling between two consecutive pulses is observed up to the repetition frequency of 100 Hz, and the surface temperature and the film thickness profiles closely match the Gaussian shape of the spatial laser beam profile. This strongly indicates that heat diffusion may be neglected during the laser pulse duration. Theoretical predictions for the TiO2 firm thickness dependence on laser intensity are in close agreement with the experimental data in the range between 2.4 and 3.2 MW/cm(2) MH - Brazil MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800142 SO - Physica Status Solidi B-Basic Research 2000 ;220(1):793-798 1533 UI - 16585 AU - Perin P AU - Soto E AU - Vega R AU - Botta L AU - Masetto S AU - Zucca G AU - Valli P AD - Univ Pavia, Dept Pharmacol & Physiol Sci, I-27100 Pavia, ItalyUniv Autonoma Puebla, Inst Fisiol, Puebla 72000, MexicoPerin, P, Univ Pavia, Dept Pharmacol & Physiol Sci, Viale Forlanini 6, I-27100 Pavia, Italy TI - Calcium channels functional roles in the frog semicircular canal AB - Different types of voltage-operated calcium channels have been described in hair cells; however, no clear functional role has been assigned to them. As a first functional characterization of vestibular calcium channels, we studied the effect of several calcium channel agonists and antagonists on whole nerve firing rate in an isolated frog semicircular canal preparation. Resting activity was affected by all dihydropyridines tested and by omega-conotoxin GVIA, whereas only nimodipine was able to reduce the mechanically evoked activity. These results indicate that nimodipine-sensitive channels play a major role in afferent transmitter release, and w-conotoxin GVIA sensitive channels regulate the afferent firing (possibly on the postsynaptic side) but with a less important role. NeuroReport 11:417-420 (C) 2000 Lippincott Williams & Wilkins MH - Italy MH - Mexico|Puebla PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000084992200040 L2 - afferent discharge;calcium channels;dihydropyridine;hair cell;inner ear;receptor potential;semicircular canal;transmitter release;vestibular system;COCHLEAR HAIR-CELLS; GUINEA-PIG COCHLEA; CA2+ CHANNELS; CURRENTS; DIHYDROPYRIDINES; POTASSIUM SO - Neuroreport 2000 ;11(2):417-420 1534 UI - 15046 AU - Perrier JF AU - Mejia-Gervacio S AU - Hounsgaard J AD - Univ Copenhagen, Panum Inst, Dept Med Physiol, DK-2200 Copenhagen N, DenmarkUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoHounsgaard, J, Univ Copenhagen, Panum Inst, Dept Med Physiol, Blegdamsvej 3, DK-2200 Copenhagen N, Denmark TI - Facilitation of plateau potentials in turtle motoneurones by a pathway dependent on calcium and calmodulin AB - 1. The involvement of intracellular calcium and calmodulin in the modulation of plateau potentials in motoneurones was investigated using intracellular recordings from a spinal cord slice preparation. 2. Chelation of intracellular calcium with BAPTA-AM or inactivation of calmodulin with W-7 or trifluoperazine reduced the amplitude of depolarization-induced plateau potentials. Inactivation of calmodulin also inhibited facilitation of plateau potentials by activation of group I metabotropic glutamate receptors or muscarinic receptors. 3. In low-sodium medium and in the presence of tetraethylammonium and tetrodotoxin, calcium action potentials evoked by depolarization were followed by a short hyperpolarization ascribed to the calcium-activated non-selective cationic current (I-CAN) and by a dihydropyridine-sensitive afterdepolarization. The amplitude of the afterdepolarization depended on the number of calcium spikes and was mediated by L-type calcium channels. 4. The dihydropyridine-sensitive afterdepolarization induced by calcium spikes was reduced by blockade of calmodulin. 5. It is proposed that plateau potentials in spinal motoneurones are facilitated by activation of a calcium-calmodulin-dependent pathway MH - Denmark MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 22 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000089949400012 L2 - DORSAL HORN NEURONS; SPINAL MOTONEURONS; MOTOR UNITS; CHANNELS; INACTIVATION; CORD SO - Journal of Physiology-London 2000 ;528(1):107-113 1535 UI - 16240 AU - Perrin C AU - Gonzalez-Marquez H AU - Gaillard JL AU - Bracquart P AU - Guimont C AD - Univ Nancy 1, INRA, Lab Biosci Aliment, Unite E Agrave, F-54506 Vandoeuvre Nancy, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Mexico City 09340, DF, MexicoBracquart, P, Univ Nancy 1, INRA, Lab Biosci Aliment, Unite E Agrave, BP 239, F-54506 Vandoeuvre Nancy, France TI - Reference map of soluble proteins from Streptococcus thermophilus by two-dimensional electrophoresis AB - Streptococcus thermophilus is a lactic acid bacterium widely used for the production of fermented dairy products. The two-dimensional electrophoresis (2-DE) protein profile was obtained from three independent analyses of 2-DE gels of soluble proteins of the strain PB18. About 270 spots were detected by silver staining and the average molecular weight and isoelectric point of each protein spot were calculated to be 41 600 and 5.2, respectively. Twelve proteins were purified by chromatographic techniques because their concentration was too low for direct sequencing from blots. Eleven were located in the PB18 2-DE profile after silver staining. These preliminary results contribute to the setting up of a two-dimensional image (or reference map) of the proteins from S. thermophilus in order to identify and compare strains of various origin or to follow metabolic process such as stress. Bidimensional autoradiographs of two strains (PB18 and ST105) of S, thermophilus grown in exponential phase at 42 degrees C with [S-35]methionine were compared with an image analysis system. Among the eleven located proteins in the 2-DE silver-stained profile, nine were found in PB18 and eight in ST105 autoradiographs. One protein was specific to PB18. The eight proteins could play the role of internal 2-D PAGE markers of p/ and M-r for S. thermophilus MH - France MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0173-0835 UR - ISI:000086258300017 L2 - two-dimensional polyacrylamide gel electrophoresis;Streptococcus thermophilus;tag sequencing;POLYACRYLAMIDE-GEL ELECTROPHORESIS; 2-DIMENSIONAL ELECTROPHORESIS; SACCHAROMYCES-CEREVISIAE; DATABASE; HEAT SO - Electrophoresis 2000 ;21(5):949-955 1536 UI - 15791 AU - Persi P AU - Tapia M AU - Roth M AD - CNR, Ist Astrofis Spaziale, Area Ric Tor Vergata, I-00133 Rome, ItalyUNAM, Inst Astron, Ensenada 22830, Baja California, MexicoCarnegie Inst Washington, Las Campanas Observ, La Serena, ChilePersi, P, CNR, Ist Astrofis Spaziale, Area Ric Tor Vergata, Via Fosso Cavaliere, I-00133 Rome, Italy TI - The NGC 6334 IV massive star formation site: a cluster in the making? AB - Sub-arcsecond JHK images of the star formation region NGC 6334 IV covering 14.7 sq arcmin have been obtained. These were supplemented by H-2 and Br gamma images of the central 2 sq arcmin. A total of 1238 sources brighter than K similar or equal to 17 were detected. Due to the very high extinction in this region, only 685 of these are brighter at 1.2 mu m than our limit, J similar or equal to 20. Only less than 5% of the sources exhibit excess emission at lambda > 2.0 mu m and they are scattered over the whole area covered. No evidence of a developed stellar cluster was found, but a small number of luminous (O-B2) young stellar objects were detected. These are embedded in the densest part of the molecular cloud that is at the centre of a giant bipolar structure seen in the radio and the infrared. This morphology is the result of the effect of massive stellar winds originating from the centre of a dense molecular toroid which collimates the outflow material giving rise to two lobes of thermal gas and dust emission. We confirm that the extinction is higher toward the southern lobe than toward the northen one but both are less reddened than their immediate surroundings. A new centre of active massive star formation is reported to the east of the central region. Close to a (sub)millimeter emission peak, a large infrared nebula with several point-like sources was found at 2.2 mu m The discovery of a small embedded low-luminosity bipolar object in the vicinity of one of the giant lobes is also reported MH - Chile MH - Italy MH - Mexico|Baja California PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000087851000033 L2 - stars : formation;ISM : clouds;ISM : dust, extinction;ISM : HII regions;infrared : stars;H-II REGIONS; HERBIG-HARO OBJECTS; INFRARED OBSERVATIONS; STELLAR POPULATION; MOLECULAR CLOUD; NGC-6334; PHOTOMETRY; EXTINCTION; IMAGES; LAW SO - Astronomy and Astrophysics 2000 ;357(3):1020-1030 1537 UI - 15595 AU - Petean J AD - Max Planck Inst Math, D-5300 Bonn, GermanyCIMAT, Guanajuato, MexicoPetean, J, Max Planck Inst Math, Gottfried Claren Str 26, D-5300 Bonn, Germany TI - The Yamabe invariant of simply connected manifolds AB - Let M be any simply connected smooth compact manifold of dimension IE greater than or equal to 5. We prove that the Yamabe invariant of M is non-negative. This is equivalent to say that the infimum, over the space of all Riemannian metrics on M, of the L-n/2 norm of the scalar curvature is zero MH - Germany MH - Mexico|Guanajuato PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 12 U4 - Mathematics U5 - J;Article AV - English IS - 0075-4102 UR - ISI:000088297900008 L2 - POSITIVE SCALAR CURVATURE; CONJECTURE SO - Journal fur Die Reine und Angewandte Mathematik 2000 ;523():225-231 1538 UI - 14848 AU - Peter M AU - Hajdu P AU - Varga Z AU - Damjanovich S AU - Possani LD AU - Panyi G AU - Gaspar R AD - Debrecen Univ Med, Dept Biophys, H-4012 Debrecen, HungaryDebrecen Univ Med, Hlth Sci Ctr, H-4012 Debrecen, HungaryNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoGaspar, R, Debrecen Univ Med, Dept Biophys, H-4012 Debrecen, Hungary TI - Blockage of human T lymphocyte Kv1.3 channels by Pi1, a novel class of scorpion toxin AB - Using the patch-clamp technique we determined that Pandinus imperator toxin Pi1, a recently described peptide toxin having four disulfide bridges instead of the usual three in scorpion toxins, blocked Kv1.3 channels of human T lymphocytes from the extracellular side with a 1:1 stoichiometry. Kv1.3 block was instantaneous and removable with toxin-free extracellular solution. The toxin did not influence activation or inactivation of the channels. We found that Pi1 blocked Kv1.3 with less affinity (K-d = 11.4 nM) than the structurally related three disulfide bridge containing toxins Pi2 (50 pM) and Pi3 (0.5 nM). The fourth disulfide bridge in Pi1 had no influence on the channel binding ability of the toxin; the less effective block. was due to differences in amino acid side chain properties at positions 11 and 35. (C) 2000 Academic Press MH - Hungary MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000165413000006 L2 - GATED K+ CHANNELS; PANDINUS IMPERATOR; BLOCKING TOXIN; VENOM SO - Biochemical and Biophysical Research Communications 2000 ;278(1):34-37 1539 UI - 14536 AU - Peterson AT AU - Navarro-Siguenza AG AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66044, USANatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66044, USA TI - A new taxon in the Amazilia viridifrons (Chordata : Aves : Trochilidae) complex of southern Mexico AB - We examined variation among populations of the complex assemblage of hummingbirds presently considered to constitute Amazilia viridifrons (Elliott, 1871), of Guerrero, Oaxaca, and Chiapas. A previous author had correctly suggested recognition of most Oaxaca populations as a full species, A. wagneri Phillips, 1964. We found that the Chiapas populations are also recognizable as a distinct taxon; because no name had previously been applied to these populations, we name it as a new subspecies, A. viridifrons villadai. Populations recently described as A. viridifrons rowlei are actually referable to A. wagneri; moreover, that subspecies is not valid as an entity distinct from the remainder of A.wagneri MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 3 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000166265200002 SO - Proceedings of the Biological Society of Washington 2000 ;113(4):864-870 1540 UI - 16478 AU - Peterson AT AU - Egbert SL AU - Sanchez-Cordero V AU - Price KP AD - Univ Kansas, Nat Hist Museum, Lawrence, KS 66045, USAUniv Kansas, Dept Ecol & Evolutionary Biol, Lawrence, KS 66045, USAUniv Kansas, Dept Geog, Lawrence, KS 66045, USAUniv Kansas, Kansas Appl Remote Sensing, Lawrence, KS 66045, USANatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Nat Hist Museum, Lawrence, KS 66045, USA TI - Geographic analysis of conservation priority: endemic birds and mammals in Veracruz, Mexico AB - Regional conservation priorities can be set based on combinations of modeling individual endemic species' distributions, evaluating regional concentrations of species richness, and using complementarity of areas by maximizing inclusion of species in the overall system. The method is illustrated for 19 species of mammals and birds endemic to northeastern Mexico. Individual species' distributions were modeled using a simple parallelepiped approach, and conservation priorities identified using a heuristic complementarity algorithm. The optimized reserve system identified by this approach performed 33-58% better than existing protected areas in inclusion of the endemic species, and adjustments to the existing system are proposed. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 39 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000085539600010 L2 - distribution;complementarity;endemism;conservation priorities;Veracruz;COMPLEMENTARY AREAS; RESERVE SELECTION; DIVERSITY; SYSTEMS; HABITAT; PLANTS; SWEDEN SO - Biological Conservation 2000 ;93(1):85-94 1541 UI - 14958 AU - Pettinari F AU - Jouiad M AU - Caron P AU - Calderon H AU - Coujou A AU - Clement N AD - CEMES, UPR CNRS 8011, Toulouse, FranceONERA, Chatillon, FranceInst Politecn Nacl, Dept Ing Metal, Mexico City, DF, MexicoPettinari, F, CEMES, UPR CNRS 8011, Toulouse, France TI - Influence of the solute nature on the tensile behaviour land on the microstructure of gamma-phases of nickel based superalloys AB - The influence of solute elements such as W, Re and Ru on the tensile behaviour of the gamma -phase of nickel-based model superalloys is examined. Using macroscopic tensile tests which were carried out at different temperatures as well as post mortem TEM observations, it is shown that the characteristics of the alloys are similar. However some differences are stressed and discussed in terms of differences in the nature of solute atoms. The existence and the vanishing of dislocation pile-ups as well as paired dislocations as a function of temperature is discussed MH - France MH - Mexico|Distrito Federal PB - NANTERRE CEDEX: REVUE DE METALLURGIE RP - NOT IN FILE U3 - TC 2 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - French IS - 0035-1563 UR - ISI:000165104000003 L2 - FRICTION STRESSES; STACKING-FAULTS; ORDER; SLIP; DEFORMATION; ALLOYS; TEMPERATURE; MATRIX; PLANAR; MC2 SO - Revue de Metallurgie-Cahiers D Informations Techniques 2000 ;97(9):1037-+ 1542 UI - 16564 AU - Pezzin SH AU - Archundia C AU - Collins KE AU - Collins CH AD - Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, BrazilUniv Estado Santa Catarina, Ctr Ciencias Tecnol, BR-89223100 Joinville, SC, BrazilUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPezzin, SH, Univ Estadual Campinas, Inst Quim, Cx Postal 6154, BR-13083970 Campinas, SP, Brazil TI - Product speciation and aquation after the reaction of Cr-51(VI) with concentrated HCl or H2SO4 AB - The present study was undertaken to investigate the reaction of Cr(VI) in concentrated hydrochloric acid or concentrated sulfuric acid, as well as to evaluate the products formed when complexing anions are present during the reaction. The results show that trace level Cr(VI) is rapidly reduced to Cr(III) in both 37% HCl and 98% H2SO4 in the absence of conventional reducing agents and that the initial products are, respectively, CrCl3(H2O)(3) and Cr(H2O)(2)(SO4)(2)(-), which undergo slow aquation reactions at pH 1, giving Cr(H2O)(6)(3+) MH - Brazil MH - Mexico|Distrito Federal PB - PRAGUE: CZECHOSLOVAK JNL OF PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000085186800009 L2 - REDUCTION; CHROMIUM; ACID SO - Czechoslovak Journal of Physics 2000 ;50(2):315-320 1543 UI - 15721 AU - Pfeiffer H AU - Bosch P AU - Odriozola JA AU - Lopez A AU - Ascencio JA AU - Bulbulian S AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Sevilla, Inst Ciencia Mat, Seville 41092, SpainInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoBulbulian, S, Inst Nacl Invest Nucl, Mexico City 11801, DF, Mexico TI - Sol-gel synthesis of Li-ZrSiO4 AB - Li-ZrSiO4 was synthesized by the sol-gel method, Reactions were performed with different Li:Zr molar ratios: 1, 3, 5, and 6, Cell parameters changed as follows: a, decreased and c(0) increased as the Li:Zr molar ratio increased, The x-ray photoelectron spectroscopy analysis showed two kinds of oxygen atoms. The first one was attributed to ZrSiO4 oxygens. The second one was attributed to Li-O bonds. All these results were supported by a theoretical analysis. It was concluded that lithium atoms were held in interstitial positions of the ZrSiO4 structure MH - Mexico|Distrito Federal MH - Spain PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000087968000009 L2 - V-ZRSIO4 SO - Journal of Materials Research 2000 ;15(7):1490-1495 1544 UI - 16365 AU - Pfeiler E AU - Padron D AU - Crabtree RE AD - Inst Tecnol & Estudios Super Monterrey, Dept Ciencias Marinas, Guaymas 85400, Sonora, MexicoArizona State Univ, Dept Biol, Tempe, AZ 85287, USAFlorida Marine Res Inst, Dept Environm Protect, St Petersburg, FL 33701, USAPfeiler, E, Inst Tecnol & Estudios Super Monterrey, Dept Ciencias Marinas, Apartado Postal 484, Guaymas 85400, Sonora, Mexico TI - Growth rate, age and size of bonefish from the Gulf of California AB - Growth rates of cultured first-year bonefish Albula sp. averaged 0.32 mm day(-1). Maximum theoretical growth (+/- 95% CI) was 278 (+/- 11.2) mm L-S (sexes combined), confirming that Albula sp. from the Gulf of California grow less than other species in the ' vulpes ' complex. (C) 2000 The Fisheries Society of the British Isles MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-1112 UR - ISI:000085859400015 L2 - age-size relationship;bonefish (Albuliformes);growth;otolith analysis;LARVAL BONEFISH; ALBULA; EVOLUTION SO - Journal of Fish Biology 2000 ;56(2):448-453 1545 UI - 15868 AU - Phillips AD AU - Giron J AU - Hicks S AU - Dougan G AU - Frankel G AD - Univ London, Dept Paediat Gastroenterol, Royal Free Hosp, London NW3 2QG, EnglandUniv Autonoma Puebla, Ctr Invest Microbiol Benemerita, Puebla 72570, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Biochem, London SW7 2AZ, EnglandPhillips, AD, Univ London, Dept Paediat Gastroenterol, Royal Free Hosp, London NW3 2QG, England TI - Intimin from enteropathogenic Escherichia coli mediates remodelling of the eukaryotic cell surface AB - Adhesion to cultured epithelial cells by enteropathogenic Escherichia coil (EPEC) is associated with extensive rearrangement of the host cell cytoskeleton. Evidence has been presented that EPEC adhesion is associated with activation of signal transduction pathways leading to production of a characteristic histopathological feature known as the attaching and effacing (A/E) lesion. A/E lesion formation requires intimin, an EPEC adhesion molecule and several EPEC secreted proteins (EspA, B, D and Tir) involved in cell signalling and protein translocation. In this study it is shown that HEp-2 cells respond during the early stages of infection with two wild-type EPEC strains (B171 and E2348/69) by producing microvillus-like processes (MLP) at the site of initial bacterial adherence. Intimin appears to play a key role in MLP elongation. At later stages of infection with these wild-type EPEC strains, when A/E lesions have formed, the MLP were reduced in number and length to appear as at time zero, and the cell surface in the vicinity of bacterial clusters appeared unaffected. In contrast, infection with EspA- or EspB-negative, but intimin-positive, EPEC strains (UMD872 and UMD864, respectively) resulted in enhanced MLP proliferation and formation of 'cage-like' structures engulfing the bacteria. Inoculating HEp-2 cells with intimin-coated latex spheres induced similar 'cage-like' structures. Caco-2 cells did not show intimin-induced microvillus elongation in response to EPEC infection, although microvillus effacement and reduction in number occurred. Similar phenomena appeared on B171 and E2348/69 infection of paediatric intestine using in vitro organ culture, i.e. elongated microvilli were seen in association with small colonies and at the periphery of large localized colonies, along with evidence of microvillus breakdown and debris in the colony centre. These results show that intimin activates signal transduction pathways involved in the remodelling of the eukaryotic cell surface, probably via binding to a receptor encoded by the host cell MH - United Kingdom MH - Mexico|Puebla PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 27 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000087598700012 L2 - enteropathogenic Escherichia coli;intimin;cell culture;in vitro organ culture;microvilli;EPITHELIAL-CELLS; HELA-CELLS; HOST-CELLS; TYROSINE PHOSPHORYLATION; PROTEIN TRANSLOCATION; SIGNAL TRANSDUCTION; EFFACING ACTIVITIES; ACTIN PEDESTALS; BINDING DOMAIN; ADHESION SO - Microbiology-Uk 2000 ;146():1333-1344 1546 UI - 16576 AU - Phillips JP AU - Cuesta L AD - Inst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoInst Astrofis Canarias, E-38200 La Laguna, SpainPhillips, JP, Inst Astron & Meteorol, Ave Vallarta 2602, Guadalajara 44130, Jalisco, Mexico TI - Extinction mapping of the bipolar outflow NGC 2346 AB - We have acquired narrowband imaging of NGC 2346 in the transitions H I lambda 6563 and lambda 4861 and [O III] lambda 5007. As a result, we are able to evaluate the variation of both excitation and extinction over the projected central parts of the nebular shell. Extinction appears to be surprisingly uniform, and there is (in particular) little evidence for the reddening asymmetries proposed in previous analyses. Cusplike enhancements in A(v) at the periphery of the source are attributed to a layer of extincting material at the limits of the H II region, implying a value of major-axis reddening Delta A(v) < 0.5 mag. Similar extinctions are also deduced from an analysis of infrared and millimeter-wavelength observations. It is unclear what proportion of this reddening may be attributed to the molecular belt, although it seems likely that this feature contributes similar to 0.3 mag of extinction in the northern lobe and explains the north-south asymmetries noted in optical images. Given that levels of local extinction are quite modest, it seems likely that the larger part of the observed reddening (A(v) approximate to 2 mag) arises from intervening interstellar material, a conclusion that is again at variance with previous analyses. Such a presumption would explain the relative uniformity in extinction over the face of the nebula, and similarity between distances estimated from extinction and those determined through alternative analyses. If this is accepted, however, then it follows that prior estimates of central star extinction must be greatly in error. One possible origin for this error is noted from Hubble Space Telescope imagery in [N II] lambda 6584, where it is clear that a secondary star is located close to the presumed A-type central star, a component that was not allowed for in previous analyses. It is unclear whether this star is physically associated with the core binary system MH - Mexico|Jalisco MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000085109700030 L2 - dust, extinction;ISM : jets and outflows;ISM : kinematics and dynamics;planetary nebulae : individual (NGC 2346);PLANETARY-NEBULA NGC-2346; CENTRAL STAR; NGC-7027; DUST; EVOLUTION; MODEL; CO SO - Astronomical Journal 2000 ;119(1):335-341 1547 UI - 15253 AU - Picazo O AU - Rosenblatt JS AU - Fernandez-Guasti A AD - Escuela Super Med, Inst Politecn Nacl Plan San Luis & Diaz Miron, Mexico City 11340, DF, MexicoRutgers State Univ, Dept Psychol, Behav & Neural Sci Program, Newark, NJ 07102, USAPicazo, O, Escuela Super Med, Inst Politecn Nacl Plan San Luis & Diaz Miron, Col Sto Tomas, Mexico City 11340, DF, Mexico TI - The differential effect of the anxiolytic agent 8-OH-DPAT during lactation is independent of pup withdrawal and maternal behavior AB - Injection of the serotonergic agonist, 8-hydroxy-2-(di-n-propylamino-tetralin (8-OH-DPAT) (0.5 mg/kg ip) produced a clear anxiolytic-like effect (as measured in the burying behavior test), after parturition, which remains until day 6 of lactation. Thereafter 8-OH-DPAT completely lacked action. In order to analyze whether lactation prevented the action of 8-OH-DPAT, dams were separated from their pups for five consecutive days. The blockade of the anxiolytic effect of 8-OH-DPAT does not disappear by isolation of the mothers from their offspring or from neighboring pups. Finally, to investigate the possible role of maternal behavior in the blockade of the anxiolytic effect of 8-OH-DPAT a third experiment was made in which ovariectomized females were rendered maternal by the sensitization procedure. These females respond normally to the antianxiety actions of 8-OH-DPAT. Results suggest that a long-term clue triggered by lactation, possibly related to prolactin secretion, interferes with the anxiolytic effect of 8-OH-DPAT. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0306-4530 UR - ISI:000089308900004 L2 - anxiety;lactation;8-OH-DPAT;maternal behavior;burying behavior;pup withdrawal;rats;HYPOTHALAMIC 5-HT1A RECEPTORS; PROLACTIN SECRETION; ANIMAL-MODELS; NEUROENDOCRINE RESPONSES; ESTROUS-CYCLE; SERUM PROLACTIN; ANXIETY; RATS; RELEASE; DESENSITIZATION SO - Psychoneuroendocrinology 2000 ;25(7):693-706 1548 UI - 16212 AU - Pichardo B AU - Vazquez-Semadeni E AU - Gazol A AU - Passot T AU - Ballesteros-Paredes J AD - Observ Cote Azur, CNRS, UMR 6529, F-06304 Nice 4, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoPichardo, B, Natl Autonomous Univ Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - On the effects of projection on morphology AB - We study the effects of projection of three-dimensional data onto the plane of the sky by means of numerical simulations of turbulence in the interstellar medium including the magnetic field, parameterized cooling and diffuse and stellar heating, self-gravity, and rotation. We compare the physical-space density and velocity distributions with their representation in position-position-velocity (PPV) space ("channel maps"), noting that the latter can be interpreted in two ways: either as maps of the column density's spatial distribution (at a given line-of-sight [LOS] velocity) or as maps of the spatial distribution of a given value of the LOS velocity (weighted by density). This ambivalence appears related to the fact that the spatial and PPV representations of the data give significantly different views. First, the morphology in the channel maps more closely resembles that of the spatial distribution of the LOS velocity component than that of the density field, as measured by pixel-to-pixel correlations between images. Second, the channel maps contain more small-scale structure than three-dimensional slices of the density and velocity fields, a fact evident both in subjective appearance and in the power spectra of the images. This effect may be due to a pseudorandom sampling (along the LOS) of the gas contributing to the structure in a channel map: the positions sampled along the LOS (chosen by their LOS velocity) may vary significantly from one position in the channel map to the next MH - France MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000086330400032 L2 - ISM : general;ISM : magnetic fields;methods : numerical;turbulence;INTERSTELLAR-MEDIUM; TURBULENCE; CLOUDS SO - Astrophysical Journal 2000 ;532(1):353-360 1549 UI - 15622 AU - Picos-Vega A AU - Ramirez-Bon R AU - Espinoza-Beltran FJ AU - Zelaya-Angel O AU - Gonzalez-Hernandez J AU - Chao B AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoInst Politecn Nacl, CINVESTAV, Lab Invest Mat, Queretaro, Qro, MexicoEnergy Convers Devices, Troy, MI 48084, USAZelaya-Angel, O, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apartado Postal 14-7407, Mexico City 07000, DF, Mexico TI - CdTe-Cd: a new semiconductor with polytype structure AB - Cd-doped CdTe thin films were prepared by sputtering on unheated glass substrates. Targets of stoichiometric CdTe with inclusions of elemental Cd were used to vary the Cd concentration of the films in the approximate range 47-55 at.%. The amount of Cd in the films is directly related to the area of the Cd pieces on the CdTe target. The electrical and structural properties of the films were analysed using Hall measurements and X-ray diffraction. It is found that both properties strongly depend on the Cd concentration. For Cd concentrations below or equal to the stoichiometric value, the crystalline structure corresponds to the regular zincblende, and the electrical transport is dominated by the extended states. For Cd concentrations above the stoichiometric value, the X-ray data show an unusual 6H polytype structure and the electrical conduction takes place by hopping along localized states. It is proposed that this latter behaviour in the conductivity occurs because the excess of ed atoms enter the CdTe lattice in interstitial sites, creating energy levels in the forbidden bandgap MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Sonora MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0141-8610 UR - ISI:000088279500010 L2 - MOLECULAR-BEAM EPITAXY; SPUTTERED FILMS; TEMPERATURE; ZNSE SO - Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties 2000 ;80(7):1621-1628 1550 UI - 14681 AU - Picquart M AU - Castro-Garcia S AU - Livage J AU - Julien C AU - Haro-Poniatowski E AD - Univ Paris 05, Grp Rech Phys & Biophys, UFR Biomed, F-75270 Paris 06, FranceUniv Paris 06, UMR 7603, Lab Milieux Desordonnes & Heterogenes, F-75252 Paris, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoPicquart, M, Univ Paris 05, Grp Rech Phys & Biophys, UFR Biomed, 45 Rue St Peres, F-75270 Paris 06, France TI - Structural studies during gelation of WO3 investigated by in-situ Raman spectroscopy AB - In the course of the preparation of WO3 by sol-gel technique we have studied kinetics of its synthesis and the structural changes during gelation. In-situ Raman scattering spectra were obtained for a series of samples during the transition from aqueous solution to gel. The changes in the Raman features were monitored as a function of time during gelation. The removal of water molecules affects the symmetric W=O stretching mode. The Raman spectrum of a gelified sample shows peaks attributed to the O-W-O bending mode and the disappearance of the high-frequency mode attributed to polyanionic species. After two days the gelified sample became a precipitated material, which exhibited the Raman spectrum of a crystalline tungsten oxide hydrate MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0928-0707 UR - ISI:000165905100002 L2 - tungsten oxide;sol-gel;Raman spectroscopy;TUNGSTEN TRIOXIDE; OXIDE CATALYSTS; MOLYBDENUM; ALUMINA SO - Journal of Sol-Gel Science and Technology 2000 ;18(3):199-206 1551 UI - 16171 AU - Picquart M AU - Haro-Poniatowski E AU - Morhange JF AU - Jouanne M AU - Kanehisa M AD - Univ Paris 05, GRPB, UFR Biomed, F-75270 Paris 06, FranceUniv Paris 06, Lab Phys Milieux Desordonnes & Heterogenes, CNRS, UMR 7603, F-75252 Paris, FrancePicquart, M, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Low frequency vibrations and structural characterization of a murine IgG2a monoclonal antibody studied by Raman and IR spectroscopies AB - The Raman and ir spectra of a murine IgG2a monoclonal antibody molecule are reported. In accordance with previous studies on immunoglobulins, the secondary structure is predominantly of the beta-sheet type. The low frequency region of the Raman spectrum was also analyzed in detail. A structured band with two maxima near 43 a,ld 94 cm(-1) was observed This band has been attributed to vibrations of elastic body. The results are interpreted using a simple elastic model. (C) 2000 John Wiley & Sons, Inc MH - France MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-3525 UR - ISI:000086467400006 L2 - immunoglobulin;ir absorption;Raman;low frequency modes;SMALL PARTICLE; PROTEINS; SCATTERING; SPECTRA; SIZE; IMMUNOGLOBULIN; MODES SO - Biopolymers 2000 ;53(4):342-349 1552 UI - 15105 AU - Pilgrim W AU - Schroeder W AU - Porcella DB AU - Santos-Burgoa C AU - Montgomery S AU - Hamilton A AU - Trip L AD - ARQP, AES, WH Schroeder Environm Canada, Toronto, ON M3H 5T4, CanadaInst Salud Ambiente & Trabajo Coapa, Mexico City 14050, DF, MexicoUniv Quebec, Montreal, PQ M3C 3P8, CanadaCommiss Environm Cooperat, Montreal, PQ H2Y 1N9, CanadaEnvironm Canada, Transboundary Air Issues, Hull, PQ K1A 3H0, CanadaPilgrim, W, 134 Daniel Dr, New Maryland, NB E3C 1C6, Canada TI - Developing consensus: mercury science and policy in the NAFTA countries (Canada, the United States and Mexico) AB - The international science community has recognized methylmercury in the aquatic food chain, as a potential environmental and human health risk. As a result, countries around the world have implemented a number of mercury management initiatives. The United States, Mexico and Canada in consultation with stakeholders are developing a trilateral North American Regional Action Plan (NARAP) on mercury. Through public involvement in the decision making process, the NARAP has offered opportunities for more transparency in transactions between governments, industry and stakeholders. In spite of the available scientific information, there are still important uncertainties associated with the mercury issue. These knowledge gaps include: the most appropriate methylmercury reference dose for sensitive groups; the percentage of the North American population that is at risk from methylmercury exposure; spatial and temporal mercury deposition patterns in each country; the link between mercury emissions, atmospheric deposition and methylmercury concentrations in fish; and the relative magnitude of contributions from natural and anthropogenic sources. (C) 2000 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000089587200019 L2 - mercury;methylmercury;science;policy;knowledge gaps;North American Regional Action Plan;IN-UTERO EXPOSURE; ANTHROPOGENIC INFLUENCES; NORTH-AMERICA; TRACE-METALS; METHYLMERCURY; DEPOSITION; EMISSIONS; CONTAMINATION; MODEL SO - Science of the Total Environment 2000 ;261(1-3):185-193 1553 UI - 14630 AU - Pimentel E AU - Cruces MP AU - Zimmering S AD - Brown Univ, Program Biol, Providence, RI 02912, USAInst Nacl Invest Nucl, Dept Genet, Salazar, MexicoZimmering, S, Brown Univ, Program Biol, Providence, RI 02912, USA TI - Evidence that chlorophyllin (CHLN) may behave as an inhibitor or a promoter of radiation-induced genetic damage in somatic cells of Drosophila AB - Irradiation of 96 h old Drosophila following a 24 h pretreatment with 5% chlorophyllin (CHLN) was delayed 0-4 days. The antimutagenic effect of CHLN in somatic cells monitored by the wing spot test persisted for 3 days after completion of the pretreatment and appeared to terminate at a rime corresponding to the cessation of mitotic divisions of wing anlagen cells. Within the same population of cells, CHLN demonstrated both an inhibitory effect as measured in mwh single spot classes, and contrarily, a promoting effect in the class of mwh/flr twin spots and to an extent in the class of large pr spots. The reason for the contrasting effects of CHLN remains to be determined. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000166029000006 L2 - chlorophyllin;inhibit;promote;radiation-induced events;somatic cells;Drosophila;ANTIMUTAGENICITY; MUTAGENICITY; PROTECTION; INVIVO SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2000 ;472(1-2):71-74 1554 UI - 16502 AU - Pimienta-Barrios E AU - Zanudo J AU - Yepez E AU - Pimienta-Barrios E AU - Nobel PS AD - Univ Guadalajara, Ctr Ciencias Biol & Ambientales, Dept Ecol, Zapopan, Jalisco, MexicoUniv Guadalajara, Ctr Ciencias Biol & Ambientales, Dept Agr Prod, Zapopan, Jalisco, MexicoUniv Calif Los Angeles, OBEE, Dept Biol, Los Angeles, CA 90095, USAPimienta-Barrios, E, Cerrada Maestranza 924,Residencial Guadalupe Jard, Zapopan 45030, Jalisco, Mexico TI - Seasonal variation of net CO2 uptake for cactus pear (Opuntia ficus-indica) and pitayo (Stenocereus queretaroensis) in a semi-arid environment AB - The objective of this work was to evaluate the effects of seasonal variation in temperature, irradiation, and soil moisture content on the photosynthetic rates of Opuntia ficus-indica and Stenocereus queretaroensis. The lowest values of positive dairy net CO2 uptake were recorded during the summer rainy season and the highest values during autumn and winter. These optimum values are likely to be the result of a prolonged period of CO2 assimilation caused by decreased cloudiness, and high rates of nocturnal CO2 assimilation due to moderate day/night air temperatures. In spring, when drought was exacerbated, daily net CO2 uptake was negative for both O. finus-indica and S. queretaroensis. Stem photosynthesis allowed both O. ficus-indica and S. queretaroensis to obtain carbon during the fall and winter, when soil water was at its lowest. (C) 2000 Academic Press MH - Mexico|Jalisco MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 11 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000085401900005 L2 - Opuntia;Stenocereus;air temperature;drought;gas exchange;phenology;photosynthetic photon flux;stress;WATER RELATIONS; GROWTH TEMPERATURE; FRUIT CROP; PHOTOSYNTHESIS; CALIFORNIA; CACTACEAE; MEXICO; ACID SO - Journal of Arid Environments 2000 ;44(1):73-83 1555 UI - 15885 AU - Pina C AU - Alvarado F AU - Torres-Villasenor G AU - Genesca J AU - Gil FJ AU - Planell JA AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Politecn Cataluna, ETSIIB, Dept Ciencia Mat & Ingn Met, E-08028 Barcelona, SpainPina, C, Univ Nacl Autonoma Mexico, Inst Invest Mat, AP 70-360, Mexico City 04510, DF, Mexico TI - Corrosion and ion release behaviour of the Zinalco and 316 L stainless steel in chlorinated solutions AB - In this paper, the corrosion resistance behaviour of the eutectoid alloy Zn-Al was studied in chlorinated solutions. Zinalco (80% Zn - 18% Al- 2% Cu), was obtained by several processes (as cast, continuous casting and extruded) and it is compared your corrosion resistance versus the austenitic stainless steel 316L in oder to substitute this steel in different technological applications. We obtained the polarization curves, rest and corrosion potential. The study of surfaces was performed by scanning electron microscope in order to determinate the damage produced by the corrosion process. Besides, the metallic ion release from the alloys to chlorinated solution were determinated MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - Spanish IS - 0001-9704 UR - ISI:000087561400005 L2 - corrosion;ion release;Zinalco SO - Afinidad 2000 ;57(486):101-108 1556 UI - 15242 AU - Pincik E AU - Bartos J AU - Jergel M AU - Falcony C AU - Bartos P AD - Slovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaIPN, CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoPincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84228, Slovakia TI - On light-related electrical properties of porous silicon/crystalline silicon structure AB - The paper presents the results of improved feedback charge capacitance-voltage (C-V) measurements obtained on a porous silicon (PS)/p-type crystalline silicon (c-Si) structure prepared in the MOS configuration. Even though the porosity (less than 10%) of the similar to 1-mu m-thick PS overlayer is low, some electrical properties of the structure are considerably sensitive to the light exposure. Such parameters as Fermi level position, flat-band voltage, surface potential, positions of the deep-level hole traps and acceptor density will be presented for various situations as defined by the sample ambient, the temperature and light illumination. The following two findings are shown and analyzed: (i) total suppression of the large hysteresis, which is typical for the measurements in dark, of the C-V curves after the illumination, and which is related to the Staebler-Wronski effect (SWE); (ii) interface states are recovered in the dark and its density N-ss has increased by similar to 4.7 x 10(10) cm(-2) eV(-1) in comparison with the zero density of illuminated PS/c-Si structure. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000089432000013 L2 - light-related electrical properties;porous silicon;crystalline silicon;DEFECT-POOL MODEL; AMORPHOUS-SILICON; SI SO - Applied Surface Science 2000 ;166(1-4):67-71 1557 UI - 14899 AU - Pirie CD AU - Walmsley S AU - Ingle R AU - Jimenez AP AU - Magallanes AS AU - Kelly CK AD - Univ Oxford, Dept Zool, Oxford OX1 3PS, EnglandUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoKelly, CK, Univ Oxford, Dept Zool, S Parks Rd, Oxford OX1 3PS, England TI - Investigations in plant commonness and rarity: a comparison of seed removal patterns in the widespread Jatropha standleyi and the endemic J-chamelensis (Euphorbiaceae) AB - During early August to late September 1998 we examined seed dispersal in the tree species Jatropha standleyi (widespread) and J. chamelensis (endemic; Euphorbiaceae) at the Estacion de Biologia Chamela,Jalisco, Mexico. Using general linear models, we found that seed removal from beneath the parental canopy did not differ between the two species and that seed removal was correlated with both seed availability on the ground and rodent predation. We inferred that seed removal was largely mediated by rodents and determined that if a seed was not removed within 4d(approx. 16% chance), it was highly unlikely to be removed at all (approx. 3.5% chance) for both species. We note that although differences in patterns of seed removal may not explain the observed differences in range size, differences between the two species in seed crop size are similar to patterns found in other endemic/widespread species pairs. (C) 2000 The Linnean Society of London MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 7 U4 - Evolutionary Biology U5 - J;Article AV - English IS - 0024-4066 UR - ISI:000165303500007 L2 - Chamela Biological Station;congeneric comparisons;population abundance;rare plants;seed dispersal by rodents;seed ecology;tropical deciduous forest;TROPICAL TREE; RANGE SIZE; DISPERSAL; RARE; SEEDLINGS SO - Biological Journal of the Linnean Society 2000 ;71(3):501-512 1558 UI - 14625 AU - Pisarchik AN AU - Meucci R AU - Arecchi FT AD - Ctr Invest Opt, Guanajuato 37150, MexicoIst Nazl Ott Applicata, I-50125 Florence, ItalyUniv Florence, Dept Phys, Florence, ItalyPisarchik, AN, Ctr Invest Opt, Loma Bosque 115,Lomas Campestre, Guanajuato 37150, Mexico TI - Discrete homoclinic orbits in a laser with feedback AB - We provide experimental evidence of the discrete character of homoclinic chaos in a laser with feedback. We show that the narrow chaotic windows are distributed exponentially as a function of a control parameter. The number of consecutive chaotic regions corresponds to the number of loops around the saddle focus responsible for Shilnikov chaos. The characterization of homoclinic chaos is also done through the return map of the return times at a suitable reference point MH - Italy MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000165879500079 L2 - COMPETING INSTABILITIES; SHILNIKOV CHAOS; DYNAMICS SO - Physical Review e 2000 ;62(6):8823-8825 1559 UI - 16454 AU - Pisarchik AN AU - Goswami BK AD - Ctr Invest Opt, Leon, GTO, MexicoBhabha Atom Res Ctr, Div Laser & Plasma Technol, Bombay 400085, Maharashtra, IndiaNatl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk, ByelarusPisarchik, AN, Ctr Invest Opt, AC Apartado Postal 1-948, Leon, GTO, Mexico TI - Annihilation of one of the coexisting attractors in a bistable system AB - A small change of one of the system parameters may not in general convert a bistable system to a monostable system. However, an external control in the form of a slow periodic parameter modulation can annihilate one of the coexisting states, and thus results in controlled monostability. The annihilation takes place because the state becomes chaotic via the period doubling route and the chaotic state undergoes boundary crisis within a small range of the control amplitude. These features are observed theoretically in two standard models, namely, Henon map and laser rate equations, and confirmed experimentally in a cavity loss modulated CO2 laser MH - Byelarus MH - India MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085267100016 L2 - STOCHASTIC RESONANCE; LASER; MULTISTABILITY; CHAOS; BIFURCATIONS; CO2-LASER; DYNAMICS; NOISE SO - Physical Review Letters 2000 ;84(7):1423-1426 1560 UI - 15094 AU - Pisciotta M AU - Coronas FI AU - Bloch C AU - Prestipino G AU - Possani LD AD - CNR, Ist Cibernet & Biofis, I-16149 Genoa, ItalyUNAM, Biotechnol Inst, Cuernavaca 62210, Morelos, MexicoEMBRAPA, Cenargen, Brasilia, DF, BrazilPrestipino, G, CNR, Ist Cibernet & Biofis, Via de Marini 6, I-16149 Genoa, Italy TI - Fast K+ currents from cerebellum granular cells are completely blocked by a peptide purified from Androctonus australis Garzoni scorpion venom AB - A novel peptide was purified from the venom of the scorpion Androctonus australis Garzoni (abbreviated Aa1, corresponding to the systematic number alpha KTX4.4). It contains 37 amino acid residues, has a molecular mass of 3850 Da, is closely packed by three disulfide bridges and a blocked N-terminalamino acid. This peptide selectively affects the K+ currents recorded from cerebellum granular cells. Only the fast activating and inactivating current, with a kinetics similar to I-A-type current, is completely blocked by the addition of low micromolar concentrations (K-i value of 150 nM) of peptide Aa I to the external side of the cell preparation. The blockade is partially reversible in our experimental conditions. Aa1 blocks the channels in both the open and the closed states. The blockage is test potential independent and is not affected by changes in the holding potential. The kinetics of the current are not affected by the addition of Aa1 to the preparation; it means that the block is a simple 'plugging mechanism', in which a single toxin molecule finds a specific receptor site in the external vestibule of the K+ channel and thereby occludes the outer entry to the K+ conducting pen. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0005-2736 UR - ISI:000089816200022 L2 - amino acid sequence;Androctonus australis;cerebellum granular cell;K+ channel;patch-clamp;scorpion toxin;CHARYBDOTOXIN BLOCK; POTASSIUM CHANNELS; HIGH-AFFINITY; TOXIN; PURIFICATION; INHIBITOR; MECHANISM; RECEPTOR SO - Biochimica et Biophysica Acta-Biomembranes 2000 ;1468(1-2):203-212 1561 UI - 14784 AU - Pizio O AU - Patrykiejew A AU - Sokolowski S AD - UNAM, Inst Quim, Mexico City 04511, DF, MexicoMarie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandPizio, O, UNAM, Inst Quim, Mexico City 04511, DF, Mexico TI - Evaluation of liquid-vapor density profiles for associating fluids in pores from density-functional theory AB - Using density-functional theory we calculate density profiles of an associating fluid in slit like pores as functions of two variables: The distance from the pore wall and the distance along the pore axis. Attention is focused on evaluation of the profiles characterizing the coexistence between two confined phases. We also calculate changes in the grand canonical potential connected with the formation of an interface between two coexisting confined phases. Specific calculations have been carried out for the associating, chain forming Lennard-Jones fluid adsorbed in a slitlike pore. (C) 2000 American Institute of Physics. [S0021- 9606(00)51746-2] MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 20 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000165585000034 L2 - LENNARD-JONES FLUIDS; SLIT-LIKE PORES; 4 BONDING SITES; CAPILLARY CONDENSATION; COMPUTER-SIMULATIONS; PHASE-EQUILIBRIA; ADSORPTION; TRANSITIONS; COEXISTENCE; MOLECULES SO - Journal of Chemical Physics 2000 ;113(23):10761-10767 1562 UI - 15786 AU - Pizio O AU - Sokolowska Z AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoPolish Acad Sci, Inst Agrophys, PL-20290 Lublin, PolandMarie Curie Sklodowska Univ, Fac Chem, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandPizio, O, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Effects of polydispersity in quenched-annealed fluids: An integral equation approach AB - An extension of the replica Ornstein-Zernike (ROZ) equations for partly quenched polydisperse systems is presented. Explicit calculations have been performed for a monodisperse hard sphere fluid confined by a polydisperse hard sphere disordered matrix by using Percus-Yevick and hypernetted chain (HNC) approximations. The chemical potential of adsorbed fluid species has been evaluated. A numerical solution of the ROZ equations makes use of the orthonormal polynomials with the weight function corresponding to the distribution function of the diameters of matrix species. We have also compared the results of theoretical predictions with Monte Carlo simulation in a canonical ensemble. The result of this comparison suggests-that the HNC approximation performs slightly better in predicting the structural properties of the system MH - Mexico|Distrito Federal MH - Poland PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000087855800008 L2 - ORNSTEIN-ZERNIKE EQUATIONS; POROUS-MEDIA; HARD-SPHERES; THERMODYNAMICS; ADSORPTION; MATRICES; SIMULATIONS; EQUILIBRIUM SO - Czechoslovak Journal of Physics 2000 ;50(6):769-783 1563 UI - 15368 AU - Plana H AU - Amram P AU - de Oliveira CM AU - Balkowski C AD - Univ Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoObserv Marseille, F-13248 Marseille 4, FranceInst Astron & Geofis, BR-04301904 Sao Paulo, BrazilObserv Paris, Sect Meudon, F-92195 Meudon, FrancePlana, H, Univ Nacl Autonoma Mexico, Observ Astron Nacl, Apdo Postal 877, Ensenada 22800, Baja California, Mexico TI - Kinematics and morphology of ionized gas in Hickson compact group 18 AB - We present new observations of Her emission in the Hickson compact group 18 (HCG 18), obtained with a scanning Fabry-Perot interferometer. The velocity field does not show motions of individual group members but instead a complex common velocity field for the whole group. The gas distribution is very asymmetric, with clumps of maximum intensity coinciding with the optically brightest knots. Comparing H alpha and H I data, we conclude that HCG 18 is not a compact group but instead a large irregular galaxy with several star-forming clumps MH - Brazil MH - France MH - Mexico|Baja California PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000089040800010 L2 - galaxies : individual (UGC 2140);galaxies : irregular;galaxies : ISM;galaxies : kinematics and dynamics;instrumentation : interferometers;IRREGULAR GALAXY IC-10; STAR-FORMATION; SAMPLE; HYDROGEN; REGIONS SO - Astronomical Journal 2000 ;120(2):621-629 1564 UI - 16069 AU - Plaschko P AU - Schaflinger U AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09304, DF, MexicoGraz Tech Univ, Christian Doppler Lab Continuous Solidificat Proc, A-8010 Graz, AustriaPlaschko, P, Univ Autonoma Metropolitana Iztapalapa, Mexico City 09304, DF, Mexico TI - Stability of two-dimensional strip casting processes AB - The solidification of molten materials is of great significance in modern metallurgical engineering. We study disturbances of a process that is characterized by three disparate lengths: the solidification length L, the wavelength Lambda, and the depth of the slab delta(proportional to). The present analysis is motivated by the relation delta(infinity) < Lambda much less than L, which is always true in practical strip casting processes. This justifies the use of an asymptotic expansion based on shallow water equations for long waves to describe the linear stability of disturbances. The leading-order equations govern a quasiparallel flow. In this limit we found two different types of disturbances: a weakly damped stable mode that runs downstream and a strongly damped perturbation traveling upstream. We focus on the downstream moving mode and show that this disturbance is strongly frequency dependent. Although the velocity disturbances are damped, there is a regime of parameters where the perturbations of the displacement grow in the horizontal direction. In our analyses we found a region of preferred frequencies. The displacement grows at these frequencies faster than for neighboring frequencies. The wavelengths of disturbances oscillating at these preferred frequencies are in qualitative agreement with the experimental observation of the wavelengths of harmonically varying grooves in the completely solidified material. (C) 2000 American Institute of Physics. [S1070-6631(00)00105-7] MH - Austria MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-6631 UR - ISI:000086826000005 L2 - EVOLUTION SO - Physics of Fluids 2000 ;12(6):1319-1326 1565 UI - 16341 AU - Plebanski JF AU - Przanowski M AU - Tosiek J AU - Turrubiates FJ AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoLodz Tech Univ, Inst Phys, PL-93005 Lodz, PolandPlebanski, JF, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Remarks on deformation quantization on the cylinder AB - Some problems of the deformation quantization for the particle on the circle are considered. It is argued that, from the physical point of view, it seems to be necessary to deal with "quantized" classical phase space. The compact form of the Moyal *-product is given MH - Mexico|Distrito Federal MH - Poland PB - KRAKOW: ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0587-4254 UR - ISI:000086040200001 L2 - QUANTUM-MECHANICS; COHERENT STATES; CIRCLE; REPRESENTATION; MANIFOLDS; PARTICLE SO - Acta Physica Polonica B 2000 ;31(3):561-587 1566 UI - 16499 AU - Plebanski JF AU - Przanowski M AU - Turrubiates FJ AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoLodz Tech Univ, Inst Phys, PL-93005 Lodz, PolandPlebanski, JF, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Weyl-Underhill-Emmrich quantization and the Stratonovich-Weyl quantizer AB - Weyl-Underhill-Emmrich (WUE) quantization and its generalization are considered. It is shown that an axiomatic definition of the Stratonovich-Weyl quantizer leads to severe difficulties. Quantization on the cylinder within the WUE formalism is discussed MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000085355800014 L2 - PHASE-SPACE METHODS; QUANTUM-MECHANICS; NONCOMMUTING OPERATORS; DEFORMATION THEORY; REPRESENTATION; CALCULUS SO - Journal of Physics A-Mathematical and General 2000 ;33(4):795-804 1567 UI - 14699 AU - Pohlan J AU - Borgman J AD - Univ Bonn, Inst Obst & Gemusebau, D-53121 Bonn, GermanyUniv Autonoma Chiapas, Fac Ciencias Agr, Huehuetan, Chiapas, MexicoPohlan, J, Univ Bonn, Inst Obst & Gemusebau, Hugel 6, D-53121 Bonn, Germany TI - Traditional methods of weed control in important crops of Central America - cause of soil losses and erosion AB - Important annual crops of Central America are corn, phaseolus-beans, sorghum, rice, soybeans and sesame. Small holders cultivate more than 60% of these crops. The traditional cropping systems include the practise burning, sowing by hand, pre-emergence or post-emergence application of herbicides plus repeated hoeing with machetes. These practices result in low weed species diversity, high competitive weeds populations, small crop densities, high erosion possibilities and low yields. This situation is intensified through the increased displacement of perennial crops by annual crops and their cultivation systems. Results of field experiments and farm analysis in Mexico, Nicaragua and Costa Rica demonstrated traditional cropping and weeding practise. Recommendations and examples for more sustainable, integrated weed management under the mentioned conditions conclude the paper MH - Germany MH - Mexico|Chiapas PB - STUTTGART: EUGEN ULMER GMBH CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - German IS - 0340-8159 UR - ISI:000202836800105 L2 - weed control;corn;sorghum;soybean;phaseolus-beans;sugar cane;papaya;erosion SO - Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz-Journal of Plant Diseases and Protection 2000 ;():761-768 1568 UI - 16138 AU - Pohlan J AU - Borgman J AD - Univ Bonn, Inst Obstbau & Gemusebau, D-53121 Bonn, GermanyUniv Autonoma Chiapas, Fac Ciencias Agricolas, Huehuetan, Chiapas, MexicoPohlan, J, Univ Bonn, Inst Obstbau & Gemusebau, Hugel 6, D-53121 Bonn, Germany TI - Traditional methods of weed control in important crops of Central America - cause of soil losses and erosion AB - Important annual crops of Central America are corn, phaseolus-beans, sorghum, rice, soybeans and sesame. Small holders cultivate more than 60 % of these crops. The traditional cropping systems include the practise burning, sowing by hand, pre-emergence or post-emergence application of herbicides plus repeated hoeing with machetes. These practices result in low weed species diversity, high competitive weeds populations, small crop densities, high erosion possibilities and low yields. This situation is intensified through the increased displacement of perennial crops by annual crops and their cultivation systems. Results of field experiments and farm analysis in Mexico, Nicaragua and Costa Rica demonstrated traditional cropping and weeding practise. Recommendations and examples for more sustainable, integrated weed management under the mentioned conditions conclude the paper MH - Germany MH - Mexico|Chiapas PB - STUTTGART 70: EUGEN ULMER GMBH CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - German IS - 0340-8159 UR - ISI:000086515000105 L2 - weed control;corn;sorghum;soybean;phaseolus-beans;sugar cane;papaya;erosion SO - Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz-Journal of Plant Diseases and Protection 2000 ;():761-768 1569 UI - 14717 AU - Polette LA AU - Gardea-Torresdey JL AU - Chianelli RR AU - George GN AU - Pickering IJ AU - Arenas J AD - Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968, USAStanford Synchrotron Radiat Lab, Stanford, CA 94305, USAInst Nacl Invest Nucl, Mexico City 01000, DF, MexicoGardea-Torresdey, JL, Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968 USA TI - XAS and microscopy studies of the uptake and bio-transformation of copper in Larrea tridentata (creosote bush) AB - Herein we present work directed toward understanding the mechanisms employed by Larrea tridentata (Creosote bush) to uptake and simultaneously defend against the presence of excess copper. The location and nature of copper in the plant have been studied on several length scales: greater than 10 mum (scanning electron microscopy), less than 10 mum (transmission electron microscopy) and atomic level structure and speciation (EXAFS and XANES). Two interesting results are apparent: creosote takes up or adsorbs copper from the soil in the Cu(II) oxidation state and transports it to the leaves where copper is found as Cu(I) and Cu(II). The transport agent appears to be a Cu phytochelatin. Additionally, creosote may be immobilizing and excreting copper via at least two additional mechanisms: storage of metals in vacuoles and excretion of copper into the sticky resinous substance found on the leaf surface. Creosote may also accumulate wind-blown particulates that can easily adhere to the resinous sticky surface of the plant. If, however, the particulates are < 10 m they may enter the leaf by respiration through the plant 'stomata' that have openings between 5 mum and 10 mum As such, creosote may be a natural bio-indicator for airborne particulates that are < 10 m. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0026-265X UR - ISI:000165831000004 L2 - creosote;Larrea tridentata;copper;phytoremediation;X-ray absorption spectroscopy;RAY-ABSORPTION SPECTROSCOPY; THLASPI-CAERULESCENS; PHYTOREMEDIATION; CR(III); PLANTS SO - Microchemical Journal 2000 ;65(3):227-236 1570 UI - 16049 AU - Politi A AU - Ruffo S AU - Tessieri L AD - Ist Nazl Ott, I-50125 Florence, ItalyINFM, Florence, ItalyUniv Florence, Dipartimento Energet S Stecco, I-50139 Florence, ItalyIst Nazl Fis Nucl, I-50125 Florence, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoPoliti, A, Ist Nazl Ott, I-50125 Florence, Italy TI - Time evolution of wave-packets in quasi-1D disordered media AB - We have investigated numerically the quantum evolution of a delta-like wave-packet in a quenched disordered medium described by a tight-binding Hamiltonian with long-range hopping (band random matrix approach). We have obtained clean data for the scaling properties in time ana in the bandwidth b of the packet width (M) over bar and its fluctuations Delta((M) over bar) with respect to disorder realizations. We confirm that the fluctuations of the packet width in the steady-state show an anomalous scaling Delta((M) over bar)/(M) over bar similar to b(-delta) with delta = 0.75 +/- 0.03. This can be related to the presence of non-Gaussian tails in the distribution of (M) over bar. Finally, we have analysed the steady state probability profile and we have found 1/b corrections with respect to the theoretical formula derived by Zhirov in the b --> infinity limit, except at the origin, where the corrections are O(1/root b) MH - Italy MH - Mexico|Puebla PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000086918400011 L2 - BAND RANDOM MATRICES; SCALING PROPERTIES; QUANTUM CHAOS; LOCALIZATION; DIFFUSION SO - European Physical Journal B 2000 ;14(4):673-679 1571 UI - 16406 AU - Ponce-Alquicira E AU - Taylor AJ AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoUniv Nottingham, Div Food Sci, Loughborough LE12 5RD, Leics, EnglandPonce-Alquicira, E, Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Av Purisima & Michoacan Col Vicentina,Apartado Po, Mexico City 09340, DF, Mexico TI - Extraction and ESI-CID-MS/MS analysis of myoglobins from different meat species AB - Meat speciation methods for raw meats are available but are not always effective in cooked products. The globin protein from myoglobin is heat stable, shows different molecular weights for each species and electrospray mass spectrometry (ESI-MS) can partially differentiate some species. To improve the analysis, the heat stable globin protein was extracted and subjected to fragmentation by ESI-CID-MS/MS. The [M + 16H](16+) and [M + 17H](17+) ions were chosen as precursor ions and fragmented by collision-induced dissociation (CID). Fragmentation occurred at proline residues with cleavage either side of the peptide bond leading to the typical pattern of peptide ions. The patterns were dominated by a series of y(n)" fragments of which the fragments from cleavage of the His/Pro residues at 119/120 (y(34)" and y(35)") were relatively intense. A strategy for differentiating the four species by ESI-MS and ESI-CID-MS/MS is discussed. (C) 2000 Published by Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000085752600013 L2 - myoglobin;ESI-CID-MS/MS;TANDEM MASS-SPECTROMETRY; ELECTROSPRAY IONIZATION; PEPTIDES; DISSOCIATION; STABILITY; PROTEINS SO - Food Chemistry 2000 ;69(1):81-86 1572 UI - 15225 AU - Ponce-de-Leon C AU - Field RW AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Bath, Dept Chem Engn, Bath BA2 7AY, Avon, EnglandPonce-de-Leon, C, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - On the determination of limiting current density from uncertain data MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Electrochemistry U5 - J;Article AV - English IS - 0021-891X UR - ISI:000089355700010 L2 - ferric cyanide;limiting current;mass transfer;oxygen;METAL-ION REMOVAL; VITREOUS CARBON CATHODES; MASS-TRANSPORT; LABORATORY ELECTROLYZER; AQUEOUS-SOLUTIONS; PROCESS STREAMS; FLOW-THROUGH; ELECTRODES; CELL SO - Journal of Applied Electrochemistry 2000 ;30(9):1087-1090 1573 UI - 16008 AU - Ponce-de-Leon C AU - Field RW AD - Univ Bath, Dept Chem Engn, Bath BA2 7AY, Avon, EnglandPonce-de-Leon, C, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Comparison of anionic membranes used to concentrate nitric acid to beyond the azeotropic mixture AB - The electrolysis of concentrated nitric acid solutions was carried out in an electrochemical cell with parallel plates (FM01-LC ICI). An anionic membrane that permits the migration of nitrate ions under the influence of an electrical field separated the anodic and cathodic compartments. The current efficiency for the transported nitrate ions was evaluated for several membranes, at a constant current. All the membranes allowed the transport of nitrate ions at different current efficiencies, following the increase in acid concentration in the anodic compartment. This electroseparation membrane process concentrated nitric acid from 25% up to 90% in successive stages. A special case to be noted was when the acid concentration was near the azeotropic value. In this case, the acid concentration in the anodic compartment rose above the azeotropic value of 68.5%, thus breaking the azeotrope mixture. It is expected that, for some niche applications, this process could be competitive with extractive distillation. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0376-7388 UR - ISI:000087115400006 L2 - electrodialysis;nitric acid;ion-exchange membranes;separation;EXCHANGE MEMBRANES; LABORATORY ELECTROLYZER; TRANSPORT-PROPERTIES; MASS-TRANSPORT; PROTON LEAKAGE; SULFURIC-ACID; ELECTRODIALYSIS; NITRATE; REDUCTION; WATER SO - Journal of Membrane Science 2000 ;171(1):67-77 1574 UI - 15298 AU - Ponce ECL AU - Sloan HL AU - Winikoff B AU - Langer A AU - Coggins C AU - Heimburger A AU - Conde-Glez CJ AU - Salmeron J AD - Inst Nacl Salud Publ, Ctr Invest Salud Publ, Cuernavaca 62508, Morelos, MexicoPopulat Council, New York, NY 10021, USAPopulat Council, Mexico City, DF, MexicoInst Mexicano Seguro Social, Mexico City, DF, MexicoConde-Glez, CJ, Inst Nacl Salud Publ, Ctr Invest Salud Publ, Ave Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - The power of information and contraceptive choice in a family planning setting in Mexico AB - Objectives: This study measured the effect of information about family planning methods and STD risk factors and prevention, together with personal choice on the selection of intrauterine devices (IUDs) by clients with cervical infection. Methods: We conducted a randomised, controlled trial in which family planning clients were assigned to one of two groups,. the standard practice (control) group in which the provider selected the woman's contraceptive and the information and choice (intervention) group. The study enrolled 2107 clients in a family planning clinic in Mexico City. Results: Only 2.1% of the clients had gonorrhoea or chlamydial infections. Significantly fewer women in the intervention group selected the IUD than the proportion for whom the IUD was recommended in the standard care group by clinicians (58.2% v 88.2%, p=0.0000). The difference was even more pronounced among infected women: 47.8% v 93.2% (intervention v control group, p=0.0006). Conclusions: The intervention increased the selection of condoms and reduced the selection of IUDs, especially among women with cervical infections, for whom IUD insertion is contraindicated MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 11 U4 - Infectious Diseases U5 - J;Article AV - English IS - 1368-4973 UR - ISI:000089098200011 L2 - reproductive health;sexually transmitted diseases;contraception;PELVIC INFLAMMATORY DISEASE; SEXUALLY-TRANSMITTED DISEASES; CHLAMYDIA-TRACHOMATIS; INTRAUTERINE-DEVICES; RISK-FACTORS; INFECTIONS; NAIROBI; HEALTH; WOMEN; KENYA SO - Sexually Transmitted Infections 2000 ;76(4):277-281 1575 UI - 15656 AU - Ponce G AU - Lujan R AU - Campos ME AU - Reyes A AU - Nieto-Sotelo J AU - Feldman LJ AU - Cassab GI AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Plant Mol Biol, Cuernavaca 62250, Morelos, MexicoUniv Calif Berkeley, Dept Plant & Microbial Sci, Berkeley, CA 94720, USACassab, GI, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Plant Mol Biol, POB 510-3, Cuernavaca 62250, Morelos, Mexico TI - Three maize root-specific genes are not correctly expressed in regenerated caps in the absence of the quiescent center AB - The quiescent center is viewed as an architectural template in the root apical meristem of all angiosperm and gymnosperm root tips. In roots of Arabidopsis thaliana (L.) Heynh., the quiescent center inhibits differentiation of contacting initial cells and maintains the surrounding initial cells as stem cells. Here, the role of the quiescent center in the development of the maize (Zea mays L.) root cap has been further explored. Three maize root-specific genes were identified. Two of these were exclusively expressed in the root Eap and one of them encoded a GDP-mannose-4,6-dehydratase. Most likely these two genes are structural, tissue-specific markers of the cap. The third gene, a putative glycine-rich cell wall protein, was expressed in the cap and in the root epidermis and, conceivably is a positional marker of the cap. Microsurgical and molecular data indicate that the quiescent center and cap initials may regulate the positional and structural expression of these genes in the cap and thereby control root cap development MH - Mexico|Morelos MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0935 UR - ISI:000088156400003 L2 - development (root cap);quiescent center;root cap initials;Zea (root development);ARABIDOPSIS-THALIANA; ZEA-MAYS; MERISTEM; PROTEIN; GRAVITROPISM; CELLS; TEMPERATURE; CLONING; PEA SO - Planta 2000 ;211(1):23-33 1576 UI - 14752 AU - Popa G AU - Hirsch JG AU - Draayer JP AD - Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPopa, G, Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA TI - Shell model description of normal parity bands in even-even heavy deformed nuclei AB - The pseudo-SU(3) model is used to describe the low-energy spectra and electromagnetic transition strengths in Gd-156, Gd-158, and Gd-160. The Hamiltonian includes spherical single-particle energies, the quadrupole-quadrupole interaction, proton and neutron pairing interactions, plus four rotorlike terms. The quadrupolequadrupole and pairing interaction strengths are assigned the values chi = 23A(-5/3) and G(pi) = 21/A, G(nu) = 17/A, respectively. The single-particle energies were taken from experiment but scaled to yield an overall best fit. For the other four rotorlike terms, which do not mix SU(3) representations and induce only small changes in the spectra, a consistent set of parameters is given. The basis states are built as linear combinations of SU(3) states which are the direct product of SU(3) proton and neutron states with pseudospin zero. The results are in good agreement with experimental data, demonstrating the suitability of the model to describe heavy deformed nuclei MH - USA MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000165744400024 L2 - GAMMA-VIBRATIONAL-STATES; LOW-ENERGY STRUCTURE; PSEUDO-SU(3) MODEL; EXCITATIONS; PSEUDOSPIN; QUADRUPOLE; SYMMETRY; STRENGTH; OPERATOR; SU(3) SO - Physical Review C 2000 ;6206(6): 1577 UI - 15068 AU - Popescu MN AU - Arizmendi CM AU - Salas-Brito AL AU - Family F AD - Emory Univ, Dept Phys, Atlanta, GA 30322, USAUniv Nacl Mar Plata, Fac Ingn, Dept Fis, RA-7600 Mar Del Plata, ArgentinaUniv Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Lab Sistemas Dinam, Coyoacan 04000, DF, MexicoPopescu, MN, Emory Univ, Dept Phys, Atlanta, GA 30322, USA TI - Disorder induced diffusive transport in ratchets AB - The effects of quenched disorder on the overdamped motion of a driven particle on a periodic, asymmetric potential are studied: While for the unperturbed potential the transport is due to a regular drift, the quenched disorder induces a significant additional chaotic "diffusive" motion. Possible applications to experiments in nanoscale surfaces and particle separation are discussed MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000089807800064 L2 - QUARTZ-CRYSTAL MICROBALANCE; BROWNIAN-MOTION; MOLECULAR MOTORS; THERMAL RATCHETS; FRICTIONAL FORCE; SLIDING FRICTION; INERTIA RATCHETS; DRIVEN RATCHETS; MODELS; POTENTIALS SO - Physical Review Letters 2000 ;85(15):3321-3324 1578 UI - 16165 AU - Porras F AU - Lascurain R AU - Chavez R AU - Ortiz B AU - Hernandez P AU - Debray H AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Lab Inmunol, Dept Bioquim, Fac Med, Mexico City 04510, DF, MexicoInst Nacl Enfermedades Resp, Dept Bioquim, Mexico City 01040, DF, MexicoUniv Sci & Tech Lille Flandres Artois, Chim Biol Lab, UMR 8576, CNRS, F-59655 Villeneuve Dascq, FranceZenteno, E, Univ Nacl Autonoma Mexico, Lab Inmunol, Dept Bioquim, Fac Med, POB 70159, Mexico City 04510, DF, Mexico TI - Isolation of the receptor for Amaranthus leucocarpus lectin from murine naive thymocytes AB - From murine medullary thymocytes we purified the receptor for the Amaranthus leucocarpus lectin (ALL) using a complex with the biotin-labeled lectin and avidin-agarose as the affinity matrix, Most ALL(+) thymocytes (83%) are naive cells with the CD4(+)CD8(-)CD45RB(+) phenotype. The receptor for this lectin is a 70 kDa glycoprotein that contains 20% of sugar by mass. It is constituted mainly by aspartic and glutamic acids, serine, proline, and glycine; its glycosidic portion contains mainly O-glycosidically linked glycans with Gal, GalNAc and NeuAc residues as well as one N-glycosidically linked glycan per molecule, Ionic strength chromatography revealed that the ALL-thymocyte receptor (ALLTr) is made up by three isoforms, which possess similar amino acid composition but show slight differences in their sugar composition. The N-terminal amino acid residues are blocked both in the receptor and its purified isoforms, Analyses of the receptor's peptides, obtained by trypsin digestion with MALDI-TOF (matrix assisted laser desorption ionization-time of flight), mere compared with the relative values obtained from the NCBInr (Swiss-Prot 10/01/199) database. Our results indicate that the peptides of ALLTr show low homology (<17%) with the human KIIA protein, the Fas-associated death domain protein, and the transforming growth factor-beta type LI receptor. Our results suggest that the ALL thymocyte receptor could be considered a novel phenotypic marker specific for naive T cells MH - France MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0959-6658 UR - ISI:000086491400003 L2 - thymocyte;glycoproteins;lectins;Amaranthus leucocarpus;ontogeny;PEANUT AGGLUTININ; MOUSE THYMOCYTES; CELLS; GLYCOPROTEINS; EXPRESSION; SIALOGLYCOPROTEIN; SUBPOPULATIONS; CHROMATOGRAPHY; SEPARATION; MARKERS SO - Glycobiology 2000 ;10(5):459-465 1579 UI - 16234 AU - Portillo-Gomez L AU - Morris SL AU - Panduro A AD - Univ Guadalajara, Hosp Civil Belen, CUCS, Guadalajara 44280, Jalisco, MexicoUS FDA, Ctr Biol Evaluat & Res, Bethesda, MD, USAPortillo-Gomez, L, Univ Guadalajara, Hosp Civil Belen, CUCS, POB 2-500, Guadalajara 44280, Jalisco, Mexico TI - Rapid and efficient detection of extra-pulmonary Mycobacterium tuberculosis by PCR analysis AB - SETTING: The diagnosis of extra-pulmonary tuberculosis (EPTB) remains an important clinical problem, primarily because of the inadequate sensitivity of conventional bacteriologic methods for detecting Mycobacterium tuberculosis in extra-pulmonary specimens. OBJECTIVE: TO evaluate whether a IS6110-based polymerase chain reaction (PCR) method can be utilized to detect M. tuberculosis in non-pulmonary specimens. DESIGN: Specimens from 286 Mexican patients with a presumptive clinical diagnosis of EPTB were prospectively examined by Ziehl-Neelsen staining, mycobacterial culture on Lowenstein-Jensen slants, and by PCR. The DNA for PCR was extracted by the buffer lysis method and phenol-guanidine thiocyanate-chloroform. Primers that amplify a 200 bp fragment from the insertion-like M. tuberculosis sequence element IS6110 were utilized. RESULTS: Our results demonstrate that this PCR method is highly specific (100%) for identifying M. tuberculosis from a variety of specimens including cerebrospinal fluid (CSF), pleural fluid, ascitic fluid, pericardial fluid, urine, and lymph node exudate. Moreover, the sensitivity of PCR for detecting M. tuberculosis in CSF (94%), pleural fluid (94%), ascitic fluid and other extrapulmonary specimens (93%) greatly exceeds the sensitivity of conventional smear and culture methods. CONCLUSION: These results demonstrate that PCR can be a highly specific and sensitive aid in the detection of M. tuberculosis from extra-pulmonary specimens MH - Mexico|Jalisco MH - USA PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 26 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000086313700014 L2 - extra-pulmonary tuberculosis;PCR;M-tuberculosis;POLYMERASE CHAIN-REACTION; CLINICAL-SAMPLES; DNA FRAGMENT; DIAGNOSIS; AMPLIFICATION; MENINGITIS; SPECIMENS; COMPLEX; SPUTUM; IS6110 SO - International Journal of Tuberculosis and Lung Disease 2000 ;4(4):361-370 1580 UI - 16572 AU - Pottosin II AU - Dobrovinskaia OR AU - Schonknecht G AU - Muniz J AD - Univ Colima, Colima 28047, Col, MexicoUniv Wurzburg, D-97070 Wurzburg, Germany TI - Ca2+ permeable channel of plant vacuoles sensing Ca2+ gradient MH - Germany MH - Mexico|Colima PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779301822 SO - Biophysical Journal 2000 ;78(1):312A-312A 1581 UI - 15670 AU - Poznyak AS AU - Martinez-Guerra R AU - Osorio-Cordero A AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoPoznyak, AS, Univ Kansas, Dept Math, 405 Snow Hall, Lawrence, KS 66045 USA TI - Robust high-gain observer for nonlinear closed-loop stochastic systems AB - In this paper, the problem of robust state observation is tackled. A high-gain observer is employed to carry out the state estimation of a continuous time uncertain nonlinear system subject to external perturbations of stochastic nature. Unmodelled dynamics is assumed to be deterministic and belonging to an a priori known class of uncertainties. The control input is constructed based on the state estimates supplied by this observer. An upper bound for the estimation error and the states of this closed-loop system is derived. It is shown to be a linear combination of all a priori given uncertainty levels and turns out to be "tight" (reachable). The proposed scheme is applied to a robot manipulator with unknown friction and inaccessible angular velocities MH - Mexico|Distrito Federal MH - USA PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 1024-123X UR - ISI:000088035300003 L2 - robustness;high-gain observer;stochastic systems;DIFFERENTIAL-ALGEBRAIC APPROACH; TIME-VARYING PARAMETERS; FRICTION SO - Mathematical Problems in Engineering 2000 ;6(1):31-60 1582 UI - 14719 AU - Prinzhofer A AU - Vega MAG AU - Battani A AU - Escudero M AD - Inst Francais Petr, Div Geol & Geochem, F-92852 Rueil Malmaison, FranceInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Paris 11, Grp Geochim Gaz Rares, UMR Orsay Terre, F-91405 Orsay, FrancePrinzhofer, A, Inst Francais Petr, Div Geol & Geochem, 1&4 Ave Bois Preau, F-92852 Rueil Malmaison, France TI - Gas geochemistry of the Macuspana Basin (Mexico): thermogenic accumulations in sediments impregnated by bacterial gas AB - A gas survey was performed in the Macuspana basin (South of Mexico). Two distinct gas families were identified: Family 1 is represented by homogeneous and purely thermogenic gas, associated with condensates expelled at the end of the oil window, and Family 2 is composed of a mixture of bacterial dry gas and thermogenic gas derived from source rocks at high maturity. Chemical and isotopic parameters as well as noble gas data provided information about the sources, the proportions of mixing, and directions of hydrocarbon migration of these two families. Considering the risk associated with further oil and gas exploration in the basin, deeper zones present higher exploratory interest for Family 1 gas fields and associated oil accumulations. In contrast, the bacterial gas fields should be considered a less promising target for future oil and gas exploration. (C) 2000 Published by Elsevier Science Ltd MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0264-8172 UR - ISI:000165848700004 L2 - gas;methane;noble gases;geochemistry;migration;macuspana basin;campeche;NATURAL-GAS; GASEOUS HYDROCARBONS; CARBON; GENERATION; METHANE; FRACTIONATION; COMPONENTS; ISOTOPES; ORIGIN; OIL SO - Marine and Petroleum Geology 2000 ;17(9):1029-1040 1583 UI - 15894 AU - Prokhorov E AU - Gonzalez-Hernandez J AU - Gorev NB AU - Kodzhespirova IF AU - Kovalenko YA AD - Ctr Univ, IPN, Ctr Invest & Estudios Avanzados, Lab Invest Mat, Queretaro 76010, QRO, MexicoNatl Acad Sci Ukraine, Inst Tech Mech, Dept Funct Elements Control Syst, UA-320600 Dnepropetrovsk, UkraineProkhorov, E, Ctr Univ, IPN, Ctr Invest & Estudios Avanzados, Lab Invest Mat, Cerro Campinas S-N, Queretaro 76010, QRO, Mexico TI - Anomalous behavior of the pulse transfer characteristic of a selectively doped AlxGa1-xAs/GaAs heterostructure containing deep traps AB - The pulse transfer characteristic of a normal selectively doped AlxGa1-xAs/GaAs heterostructure containing deep traps in the AlxGa1-xAs layer is considered. It is shown that these deep traps are responsible for an undershoot in the drain-source current at the end of a positive voltage pulse applied to the gate (the pulse voltage is measured from the initial gate bias) and the trap depth can be determined from this undershoot. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Optics;Physics, Applied U5 - J;Article AV - English IS - 0167-9317 UR - ISI:000087431500022 L2 - selectively doped heterostructure;high electron mobility transistor;transfer characteristic;deep trap SO - Microelectronic Engineering 2000 ;51-2():165-170 1584 UI - 14957 AU - Prokhorov EF AU - Gorev NB AU - Kodzhespirova IF AU - Kovalenko YA AD - IPN, Ctr Invest & Estud Avanzados, Unidad Queretaro, Queretaro 76001, Qro, MexicoNatl Acad Sci Ukraine, Inst Tech Mech, Dept Funct Elements Control Syst, UA-49005 Dnepropetrovsk, UkraineProkhorov, EF, IPN, Ctr Invest & Estud Avanzados, Unidad Queretaro, Gral Arteaga 5,Apardo Postal 1-798, Queretaro 76001, Qro, Mexico TI - Sidegating mechanism as a function of the sidegate-to-channel spacing AB - It is shown that the type of nonlinearity of the substrate current-voltage characteristic beyond the sidegating threshold changes from super to sublinearity as the sidegate-to-channel spacing increases. Based on this, it is concluded that the sidegating mechanism is a function of the sidegate-to-channel spacing. This conclusion is confirmed using a simple one-dimensional computational model. (C) 2000 Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000165065100020 L2 - SEMI-INSULATING SUBSTRATE; GAAS-MESFETS; IMPACT IONIZATION; DEEP TRAPS; SIMULATION SO - Solid-State Electronics 2000 ;44(10):1857-1860 1585 UI - 16527 AU - Prokhorov EF AU - Gorev NB AU - Kodzhespirova IF AU - Kovalenko YA AD - Ctr Univ Queretaro, Lab Invest Mat, Ctr Invest Estudios Avanzados IPN, Queretaro, QRO, MexicoNatl Acad Sci Ukraine, Dept Funct Elements Control Syst, Inst Tech Mech, UA-49600 Dnepropetrovsk, UkraineProkhorov, EF, Ctr Univ Queretaro, Lab Invest Mat, Ctr Invest Estudios Avanzados IPN, Cerro Campanas SN,CP 76010, Queretaro, QRO, Mexico TI - Nonmonotony of the extrinsic photoconductivity of n-type GaAs thin-film structures under backgating AB - The extrinsic photoconductivity of an n-type GaAs thin-film structure under backgating has been studied. It is shown that this photoconductivity is a nonmonotonic function of negative substrate voltage, namely, the magnitude of the photoconductivity shows a maximum. This is due to a sharp increase in the magnitude of the photoconductivity caused by an illumination-induced change in the backgating threshold voltage and to its subsequent decrease caused by the accumulation of excess carriers near the film-substrate interface. The calculated results are in a qualitative agreement with the experimental data. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000085193300007 L2 - INTEGRATED-CIRCUITS; SUBSTRATE; LIGHT SO - Microelectronics Journal 2000 ;31(4):267-269 1586 UI - 15182 AU - Prokopy RJ AU - Jacome I AU - Pinero J AU - Guillen L AU - Fleischer FD AU - Hu X AU - Aluja M AD - Univ Massachusetts, Dept Entomol, Amherst, MA 01003, USAInst Ecol, Xalapa, Veracruz, MexicoProkopy, RJ, Univ Massachusetts, Dept Entomol, Fernald Hall, Amherst, MA 01003 USA TI - Post-alighting responses of Mexican fruit flies (Dipt., Tephritidae) to different insecticides in paint on attractive spheres AB - Two new, comparatively safe insecticides (spinosad and imidacloprid) were compared with dimethoate (each at 1.5% active ingredient) for behavioural and mortality effects on Mexican fruit flies, Anastrepha ludens. Insecticide was mixed with sugar (as a feeding stimulant) and yellow latex paint (as an extending agent) applied to the surface of fruit-mimicking biodegradable 7 cm spheres made of sugar, flour and glycerin. Flies feeding on spinosad treated spheres did not differ from flies feeding on untreated spheres in post-feeding intra-tree flight capability, amount of oviposition or mortality. Flies that fed on imidacloprid- or dimethoate-treated spheres for as little as 30 s experienced both high reduction in oviposition and high mortality compared with flies that fed on untreated spheres, and the flies from imidacloprid-treated spheres also showed a much reduced intra-tree flight capability. If baited with attractive odour, biodegradable yellow spheres treated with a surface coating of imidacloprid in latex paint and sugar could have potential for suppressing Mexican fruit flies on host trees MH - USA MH - Mexico|Veracruz PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Entomology U5 - J;Article AV - English IS - 0931-2048 UR - ISI:000089445100005 L2 - APPLE MAGGOT FLIES; PESTICIDE-TREATED SPHERES; CERATITIS-CAPITATA; ANASTREPHA-LUDENS; CITRUS ORCHARD; LETHAL; FLY SO - Journal of Applied Entomology-Zeitschrift fur Angewandte Entomologie 2000 ;124(5-6):239-244 1587 UI - 15526 AU - Puerari I AU - Block DL AU - Elmegreen BG AU - Frogel JA AU - Eskridge PB AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Witwatersrand, Dept Computat & Appl Math, ZA-2050 Wits, South AfricaIBM, TJ Watson Res Ctr, Div Res, Yorktown Heights, NY 10598, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAPuerari, I, Inst Nacl Astrofis Opt & Elect, Calle Luis Enrique Erro 1, Puebla 72840, Mexico TI - The detection of spiral arm modulation in the stellar disk of an optically flocculent and an optically grand design galaxy AB - Two dimensional Fourier spectra of near-infrared images of galaxies provide a powerful diagnostic tool for the detection of spiral arm modulation in stellar disks. Spiral arm modulation may be understood in terms of interference patterns of outgoing and incoming density wave packets or modes. The brightness along a spiral arm will be increased where two wave crests meet and constructively interfere, but will be decreased where a wave crest and a wave trough destructively interfere. Spiral arm modulation has hitherto only been detected in grand design spirals (such as Messier 81), Spiral arm amplitude variations have the potential to become a powerful constraint for the study of galactic dynamics. We illustrate our method in two galaxies: NGC 4062 and NGC 5248. In both cases, we have detected trailing and leading m=2 waves with similar pitch angles. This suggests that the amplification mechanism is the WASER type II. In this mechanism, the bulge region reflects (rather than refracts) incoming waves with no change of pitch angle, but only a change of their sense of winding. The ratio between the amplitudes of the leading and the trailing waves is about 0.5 in both cases, wherein the higher amplitude is consistently assigned to the trailing (as opposed to leading) mode. The results are particularly significant because NGC 5248 is an optically grand design galaxy, whereas NGC 4062 is optically flocculent. NGC 4062 represents the very first detection of spiral arm modulation in the stellar disk of an optically flocculent galaxy MH - Mexico|Puebla MH - South Africa MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000088588400011 L2 - galaxies : spiral;galaxies : structure;galaxies : kinematics and dynamics;galaxies : individual : NGC 4062;galaxies : individual : NGC 5248;methods : numerical;MODAL APPROACH; PATTERN SPEEDS; STAR-FORMATION; MORPHOLOGY; CLASSIFICATION; IMAGES; LIGHT; M81 SO - Astronomy and Astrophysics 2000 ;359(3):932-940 1588 UI - 14852 AU - Puig-Grajales L AU - Tan NG AU - van der Zee F AU - Razo-Flores E AU - Field JA AD - Inst Mexicano Petr, Programa Biotecnol Petr, Mexico City 07730, DF, MexicoUniv Wageningen & Res Ctr, Dept Agr Environm & Syst Technol, Subdept Environm Technol, NL-6703 HD Wageningen, NetherlandsRazo-Flores, E, Inst Mexicano Petr, Programa Biotecnol Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Anaerobic biodegradability of alkylphenols and fuel oxygenates in the presence of alternative electron acceptors AB - Alkylphenols and fuel oxygenates are important environmental pollutants produced by the petrochemical industry. A batch biodegradability test was conducted with selected ortho-substituted alkylphenols (2-cresol, 2,6-dimethylphenol and 2-ethylphenol), fuel oxygenates (methyl tert-butyl ether, ethyl tert-butyl ether and tert-amylmethyl ether) and tert-butyl alcohol (TBA) as model compounds. The ortho-substituted alkylphenols were not biodegraded after 100 days of incubation under methanogenic, sulfate-, or nitrate-reducing conditions. However, biodegradation of 2-cresol and 2-ethylphenol (150 mg l(-1)) was observed in the presence of Mn (IV) as electron acceptor. The biodegradation of these two compounds took place in less than 15 days and more than 90% removal was observed for both compounds. Mineralization was indicated since no UV-absorbing metabolites accumulated after 23 days of incubation. These alkylphenols were also slowly chemically oxidized by Mn (IV). No biodegradation of fuel oxygenates or TEA (150 mg l(-1)) was observed after SO or more days of incubation under methanogenic, Fe (III)-, or Mn (IV)-reducing conditions, suggesting that these compounds are recalcitrant under anaerobic conditions. The fuel oxygenates caused no toxicity towards acetoclastic methanogens activity in anaerobic granular sludge MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000165431500014 L2 - METHANOGENIC CONDITIONS; PARA-CRESOL; REDUCTION; OXIDATION; TOLUENE; DISSOLUTION; METABOLISM; MANGANESE; PHENOLS; OXIDES SO - Applied Microbiology and Biotechnology 2000 ;54(5):692-697 1589 UI - 15033 AU - Pursimo T AU - Takalo LO AU - Sillanpaa A AU - Kidger M AU - Lehto HJ AU - Heidt J AU - Charles PA AU - Aller H AU - Aller M AU - Beckmann V AU - Benitez E AU - Bock H AU - Boltwood P AU - Borgeest U AU - de Diego JA AU - De Francesco G AU - Dietrich M AU - Dultzin-Hacyau D AU - Efimov Y AU - Fiorucci M AU - Ghisellini G AU - Gonzalez-Perez N AU - Hanski M AU - Heinamaki P AU - Honeycutt RK AU - Hughes P AU - Karlamaa K AU - Katajainen S AU - Knee LBG AU - Kurtanidze O AU - Kummell M AU - Kuhl D AU - Lainela M AU - Lanteri L AU - Linde JV AU - Lahteenmaki A AU - Maesano M AU - Mahoney T AU - Marchenko S AU - Marscher A AU - Massaro E AU - Montagni F AU - Nesci R AU - Nikolashvili M AU - Nilsson K AU - Nurmi P AU - Pietila H AU - Poyner G AU - Raiteri CM AU - Rekola R AU - Richter GM AU - Riehokainen A AU - Robertson JW AU - Rodriguez-Espinoza JM AU - Sadun A AU - Shakhovskoy N AU - Schramm KJ AU - Schramm T AU - Sobrito G AU - Teerikorpi P AU - Terasranta H AU - Tornikoski M AU - Tosti G AU - Turner GW AU - Valtaoja E AU - Valtonen M AU - Villata M AU - Wagner SJ AU - Webb J AU - Weneit W AU - Wiren S AD - Tuorla Observ, FIN-21500 Piikkio, FinlandInst Astrofis Canarias, E-28200 La Laguna, Tenerife, SpainTurku Univ, Dept Phys, FIN-20014 Turku, FinlandLandessternwarte Heidelberg, D-69117 Heidelberg, GermanyUniv Oxford, Dept Astrophys, Nucl & Astrophys Lab, Oxford OX1 3RH, EnglandUniv Michigan, Ann Arbor, MI 48109, USAUniv Hamburg, Hamburger Sternwarte, D-21029 Hamburg 80, GermanyNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsservatorio Astron Torino, I-10025 Pino Torinese, ItalyCrimean Astrophys Observ, Isaak Newton Inst Chile, Crimean Branch, UA-98409 Crimea, UkraineUniv Perugia, Osservatorio Astron, I-06100 Perugia, ItalyOsservatorio Astron Brera, I-23807 Merate, ItalyIndiana Univ, Dept Astron, Bloomington, IN 47405, USAMetsahovi Radio Observ, FIN-02450 Kylmala, FinlandNatl Res Council Canada, Herzberg Inst Astrophys, Domin Radio Astrophys Observ, Penticton, BC V2A 6K3, CanadaAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Rome La Sapienza, Ist Astron, I-00161 Rome, ItalySt Petersburg State Univ, Inst Astron, St Petersburg 198904, RussiaBoston Univ, Dept Astron, Boston, MA 02215, USAAbastumani Observ, GE-38762 Abastumani, Rep of GeorgiaAstronomer Org, Birmingham, W Midlands, EnglandUniv Colorado, Denver, CO 80217, USAFlorida Int Univ, Dept Phys, Miami, FL 33199, USAPursimo, T, Tuorla Observ, FIN-21500 Piikkio, Finland TI - Intensive monitoring of OJ 287 AB - We present intensive optical, infrared, and radio monitoring observations of the BL Lac object OJ 287, taken between the years 1993-1998. Two large optical outbursts were detected at the predicted times in November 1994 and December 1995. The detection of these outbursts supports the binary black hole model for OJ 287. Optical and radio polarisation observations show large variability in the degree of polarisation and position angle, very similar to those observed during the 1983/84 outburst in OJ 287. The polarisation position angles show very similar behaviour during these observations, indicating that, at: least, the magnetic field orientations in radio and optical bands are related in OJ 287. Optical and infrared light curves show continuous variability in time scales ranging from tens of minutes to years. In the radio bands we have observed some of the lowest ever measured flux levels. During the first optical outburst in November 1994 the observed radio flux was very low, but during the second optical outburst radio bands also showed high flux levels. This is a puzzling observation, which can hopefully be used for discriminating between different outburst models. On top of the large outbursts OJ 287 has displayed flaring activity in time scales from days to weeks and shorter time scale flickering MH - Canada MH - United Kingdom MH - Finland MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Rep of Georgia MH - Russia MH - Spain MH - Ukraine MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000090075600011 L2 - BL Lac objects;OJ 287;photometry;BL-LACERTAE OBJECTS; EXTRAGALACTIC RADIO-SOURCES; OPTICAL OUTBURSTS; BLAZAR OJ-287; VARIABLE SOURCES; 3C 66A; POLARIZATION; VARIABILITY; STARS; OJ287 SO - Astronomy & Astrophysics Supplement Series 2000 ;146(1):141-155 1590 UI - 15722 AU - Qadri F AU - Giron JA AU - Helander A AU - Begum YA AU - Asaduzzaman M AU - Xicohtencatl-Cortes J AU - Negrete E AU - Albert MJ AD - Int Ctr Diarrhoeal Dis Res, Div Sci Lab, Dhaka 1000, BangladeshBenemerita Univ Autonoma Puebla, Ctr Invest Ciencias Microbiol, Puebla, MexicoUniv Gothenburg, Dept Med Microbiol & Immunol, Gothenburg, SwedenQadri, F, Int Ctr Diarrhoeal Dis Res, Div Sci Lab, GPO Box 128, Dhaka 1000, Bangladesh TI - Human antibody response to longus type IV pilus and study of its prevalence among enterotoxigenic Escherichia coli in Bangladesh by using monoclonal antibodies AB - Mouse monoclonal antibodies (MAbs) were derived against longus (CS20), a type IV pilus expressed by human enterotoxigenic Escherichia coli (ETEC), One MAb (ICA39) detected longus in 56 (8.5%) of 662 ETEC isolates obtained from a routine surveillance of diarrheal stools from children and adults. Five patients with diarrhea from whom longus-positive ETEC were isolated were also recruited, Of these 61 isolates, 50 were positive for other colonization factors (CFs; 61% for CFA/II and 21% for CFA/I), and 11 were negative for any of the other 8 CFs that were tested. They were either positive for the heat-stable enterotoxin (ST; n = 29) or for the heat-labile enterotoxin (LT) and ST (n = 32). All longus-positive ETEC were confirmed by polymerase chain reaction to harbor lngA, the longus structural pilin gene. Sera and/or fecal extracts from the patients reacted with the 22-kDa pilin polypeptide in immunoblots and ELISA, These studies show that longus is prevalent among ETEC in Bangladesh and that longus gives rise to IgA antibody responses in patients MH - Bangladesh MH - Mexico|Puebla MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000087923900032 L2 - COLONIZATION FACTOR ANTIGENS; O139 SO - Journal of Infectious Diseases 2000 ;181(6):2071-2074 1591 UI - 14807 AU - Qi J AU - Marsett RC AU - Moran MS AU - Goodrich DC AU - Heilman P AU - Kerr YH AU - Dedieu G AU - Chehbouni A AU - Zhang XX AD - Michigan State Univ, Dept Geog, E Lansing, MI 48824, USAUSDA ARS, Tucson, AZ, USACESBIO, Toulouse, FranceIRD, IMADES, Hermosillo, Sonora, MexicoChinese Acad Sci, Ctr Space Sci, Beijing, Peoples R ChinaQi, J, Michigan State Univ, Dept Geog, 315 Nat Sci Bldg, E Lansing, MI 48824 USA TI - Spatial and temporal dynamics of vegetation in the San Pedro River basin area AB - Changes in climate and land management practices in the San Pedro River basin have altered the vegetation patterns and dynamics. Therefore, there is a need to map the spatial and temporal distribution of the vegetation community in order to understand how climate and human activities affect the ecosystem in the arid and semi-arid region. Remote sensing provides a means to derive vegetation properties such as fractional green vegetation cover (f(c)) and green leaf area index (GLAI). However, to map such vegetation properties using multitemporal remote sensing imagery requires ancillary data for atmospheric corrections that are often not available. In this study, we developed a new approach to circumvent atmospheric effects in deriving spatial and temporal distributions off, and GLAI. The proposed approach employed a concept, analogous to the pseudoinvariant object method that uses objects void of vegetation as a baseline to adjust multitemporal images. Imagery acquired with Landsat TM, SPOT 4 VEGETATION, and aircraft based sensors was used in this study to map the spatial and temporal distribution of fractional green vegetation cover and GLAI of the San Pedro River riparian corridor and southwest United States. The results suggest that remote sensing imagery can provide a reasonable estimate of vegetation dynamics using multitemporal remote sensing imagery without atmospheric corrections. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - France MH - Mexico|Sonora MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800005 L2 - remote sensing;spatial and temporal dynamics;San Pedro River basin;fractional cover;green leaf area index SO - Agricultural and Forest Meteorology 2000 ;105(1-3):55-68 1592 UI - 16268 AU - Quevedo-Lopez MA AU - Reidy RF AU - Orozco-Teran RA AU - Mendoza-Gonzalez O AU - Ramirez-Bon R AD - Univ N Texas, Dept Mat Sci, Denton, TX 76201, USAInst Tecnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, MexicoIPN, CINVESTAV, Lab Invest Mat, Queretaro 76001, MexicoQuevedo-Lopez, MA, Univ N Texas, Dept Mat Sci, POB 305310, Denton, TX 76201 USA TI - Enhancement of the photochromic and thermochromic properties of molybdenum oxide thin films by a cadmium sulfide underlayer AB - We investigated the photochromic and thermochromic behavior of amorphous MoO3 films prepared by thermal evaporation of MoO3 powder on glass and glass/CdS substrates. We used the cadmium sulfide as a carrier charge injector to produce higher color center concentrations in the MoO3 film. The semiconductor CdS (cadmium sulfide) film was synthesized using the chemical bath deposition technique. The glass/MoO3 and glass/CdS/MoO3 films were subjected to tungsten lamp (100 W) exposure times of 45 to 180 min to study the photochromic sensitivity of the films. To study the thermochromic properties, samples were thermally annealed at temperatures ranging from 100 to 250 degrees C during 2 h. X-ray diffraction studies show that the CdS films were polycrystalline, and the oxide films were amorphous. Optical absorption measurements showed the presence of an absorption band centered around 850 nm due to the formation of color centers. Concentrations of these were calculated using the Smakula equation. Results indicate that the addition of CdS films enhances the photochromic and thermochromic properties of MoO3. Photochromism is more effective than thermochromism in generating color centers when using CdS as a charge carrier MH - USA MH - Mexico|Coahuila MH - Mexico|Queretaro PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0957-4522 UR - ISI:000086165300010 L2 - TUNGSTEN-OXIDE; COLORATION; DEPOSITION SO - Journal of Materials Science-Materials in Electronics 2000 ;11(2):151-155 1593 UI - 16362 AU - Quevedo-Lopez MA AU - Mendoza-Gonzalez O AU - Reidy RF AU - Ramirez-Bon R AU - Orozco-Teran RA AD - Univ N Texas, Dept Mat Sci, Denton, TX 76201, USAInst Tecnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, MexicoUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoQuevedo-Lopez, MA, Univ N Texas, Dept Mat Sci, POB 305310, Denton, TX 76201 USA TI - Effect of energetic treatments on the structure and resistivity of evaporated MoO3 films on cadmium sulfide substrates AB - We report the relationship between structure and morphology, and the resultant resistivity of amorphous molybdenum oxide MoO3 evaporated onto polycrystalline cadmium sulfide (CdS) substrates, Cadmium sulfide layers were synthesized on glass slide substrates using the chemical bath deposition technique (CBD), The obtained CdS films were yellowish, transparent, and homogeneous, of about 100 nm in thickness. Molybdenum oxide films were deposited onto glass and glass/CdS substrates by vacuum thermal evaporation, with film thickness of about 350 nm. X-ray diffraction studies showed that the chemically deposited CdS films were polycrystalline, and the MoO3 films deposited were amorphous, when annealing treatments were below 225 degrees C. Atomic force microscopy showed that the CdS and MoO3 topographies were uniform. When the glass/MoO3 and the glass/CdS/MoO3 films were irradiated using a tungsten lamp for 30, 60, 120, and 160 min they maintained their amorphicity. Energetic treatments did not significantly modify the resistivity; however, the presence of a CdS layer lowers the resistivity by approximately one order of magnitude. Higher degrees of amorphicity increased the resistivity in both systems, and were marked by an increase in the color centers concentration. (C) 2000 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Coahuila MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000085859000011 L2 - oxides;vapor deposition;electrical properties;optical properties;CHALCOGENIDE THIN-FILMS; RAMAN-SPECTROSCOPY; AMORPHOUS FILMS; DEPOSITION; WO3 SO - Journal of Physics and Chemistry of Solids 2000 ;61(5):727-734 1594 UI - 11278 AU - Quezada-Gallo JA AU - Debeaufort F AU - Voilley A AD - Univ Bourgogne 1, Ecole Natl Super Biol Appl Nutr & Alimentat, Lab Genie Procedes Alimentaires & Biotechnol, F-21000 Dijon, FranceCONACyT, Mexico City, DF, MexicoIUT Genie Biol, F-21014 Dijon, FranceQuezada-Gallo, JA, Univ Bourgogne 1, Ecole Natl Super Biol Appl Nutr & Alimentat, Lab Genie Procedes Alimentaires & Biotechnol, Esplanade Erasme, F-21000 Dijon, France TI - Mechanism of aroma transfer through edible and plastic packagings - Are they complementary to solve the problem of aroma transfer? AB - Aroma compounds have a strong affinity for the most of plastic and resin polymers which contribute to their relative high permeability to flavors. Furthermore, some natural polymers such as polysaccharides and proteins, used as support in the flavoring industry, have high barrier properties against aroma transfer. This work deals with the mechanism of transfer of methylketons, ethyl esters and terpens (aroma molecules usually present in food) through edible films mainly composed of polysaccharides and proteins from vegetal origin, Sorption, diffusion, permeability and structure properties of edible polymers are specially focused and compared to plastic film performances. It appears that the permeability to aroma compounds of edible films depends more on the sorption of the volatile compound and its plasticizing effect than on diffusion, whereas aroma transfer through polyethylene film depends strongly on structural characteristics of both aroma compound and polymer network MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary U5 - S;Review AV - English IS - 0097-6156 UR - ISI:000175160800012 L2 - WATER-VAPOR PERMEABILITY; D-LIMONENE VAPOR; DENSITY POLYETHYLENE; OXYGEN PERMEABILITY; SEALANT FILMS; DIFFUSIVITY; ABSORPTION; COMPOUND; SORPTION; QUALITY SO - Food Packaging: Testing Methods and Applications 2000 ;753():125-140 1595 UI - 14687 AU - quino-Bolanos EN AU - Cantwell MI AU - Peiser G AU - Mercado-Silva E AD - Univ Calif Davis, Mann Lab, Dept Vegetable Crops, Davis, CA 95616, USAUniv Autonoma Queretaro, Dept Invest & Posgrad Alimentos, Queretaro, MexicoCantwell, MI, Univ Calif Davis, Mann Lab, Dept Vegetable Crops, Davis, CA 95616 USA TI - Changes in the quality of fresh-cut jicama in relation to storage temperatures and controlled atmospheres AB - Intact jicama (Pachyrhizus erosus) roots are chilling sensitive, but quality of fresh-cut pieces (1.8 x 4.5 cm cylinders) was best maintained at low storage temperatures (0 to 5 degreesC). Respiration rates of different piece sizes were similar, and averaged 2, 7 and 10 muL CO2.g(-1).h(-1) at 0 degreesC, 5 degreesC and 10 degreesC, respectively. Storage in air at 5 degreesC to 10 degreesC resulted in surface browning and was associated with increases in phenolics and phenylalanine ammonia lyase and polyphenol oxidase activities. High CO2 atmospheres (5 to 10%) at 5 degreesC were very effective in retarding microbial growth and discoloration The source of jicama root notably affected the quality and shelf-life of the fresh-cut pieces. Fresh-cut pieces from stored roots (2 wk at 19 to 22 degreesC) had lower visual quality and crispness during subsequent storage than did pieces from recently harvested roots MH - USA MH - Mexico|Queretaro PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 6 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000165881000026 L2 - respiration;texture;color;acetaldehyde and ethanol;soluble solids;PPO;PAl;PHENYLALANINE AMMONIA-LYASE; POSTHARVEST PHYSIOLOGY; PROCESSED FRUITS; VEGETABLES; LETTUCE; INDUCTION; PHENOLICS; PRODUCTS; TUBERS; ROOTS SO - Journal of Food Science 2000 ;65(7):1238-1243 1596 UI - 16024 AU - Quintana-Ascencio PF AU - Menges ES AD - El Colegio Frontera Sur, Div Conservac Biodiversidad, San Cristobal De Las Cas, Chiapas, MexicoArchbold Biol Stn, Lake Placid, FL 33862, USAQuintana-Ascencio, PF, El Colegio Frontera Sur, Div Conservac Biodiversidad, San Cristobal De Las Cas, Chiapas, Mexico TI - Competitive abilities of three narrowly endemic plant species in experimental neighborhoods along a fire gradient AB - We conducted field experiments manipulating lichens, shrubs, and herbs along a time-since-fire gradient and assessing effects on three endemic herbaceous species of Florida scrub: Eryngium cuneifolium, Hypericum cumulicola, and Polygonella basiramia. Responses included seed germination, survival, biomass, and fecundity. Transplants into recently burned patches generally had higher survival, larger biomass, and greater reproductive output than transplants into long-unburned patches. Open areas and sites near oaks frequently were more favorable than sites near Florida rosemary. Ground lichens did not affect germination but increased mortality rate of seedlings. Neighboring small shrubby and herbaceous species did not affect the performance of these species. Of the three species, naturally occurring E. cuneifolium were farthest from large shrubs, and their microhabitats had the least ground lichens and shrubs. Eryngium cuneifolium and H. cumulicola are capable of forming persistent seed banks and their recruitment after fire depends mostly on these dormant seeds. Polygonella basiramia relies on seed dispersal and immediate seed germination to colonize recently burned patches. Management for these species should involve variable fire regimes to allow all three species to persist along with many other scrub endemics MH - Mexico|Chiapas MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 22 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000087120700010 L2 - competition;disturbance;Eryngium cuneifolium;Florida scrub;Hypericum cumulicola;lichens;Polygonella basiramia;seed banks;POSTFIRE SEEDLING ESTABLISHMENT; FLORIDA SCRUB PLANTS; TIME-SINCE-FIRE; HYPERICUM-CUMULICOLA; POPULATION-DYNAMICS; RELATIVE IMPORTANCE; LIFE-HISTORY; DEMOGRAPHY; VIABILITY; RARE SO - American Journal of Botany 2000 ;87(5):690-699 1597 UI - 15879 AU - Quintanar C AU - Garcia M AU - Martinez M AU - Castro M AU - Boldu JL AU - Munoz E AU - Taylor PR AD - Natl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Fis, Mexico City 04510, DF, MexicoUniv Calif San Diego, Dept Chem & Biochem, San Diego, CA 92186, USASan Diego Supercomp Ctr, San Diego, CA 92186, USAQuintanar, C, Natl Autonomous Univ Mexico, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Density functional embedding approach to the Mn impurities in NaBr crystals AB - We have performed density functional calculations for three 19-atom clusters, two 25-atom clusters, and one 18-atom cluster, each embedded in a Madelung potential that takes into account the long-range electrostatic interactions of the ion lattice of a NaBr crystal. One of the three 19-atom and one of the two 25-atom clusters model bulk crystalline NaBr; the others model a Mn2+ impurity trapped in a cubically symmetric crystalline electric field (CEF) site of the NaBr host. One of the latter has the NaBr bulk interatomic distance, while in the others relaxation of the Br atoms around the metallic impurity has been considered. The 18-atom cluster models a relaxed Mn impurity Na vacancy system. All of our calculated clusters have a Na site at the center, and they all include at least first and second nearest-neighbor host atoms. In the center of the doped clusters the Mn impurity replaces the missing Na ion. The electronic structure of the embedded impurity ion in its local environment was computed self-consistently by means of ah-electron density functional theory (DFT) techniques. We have examined the lattice relaxation around the impurity and calculated the hyperfine coupling constants (HFCC). The results for the Mn electronic structure and for the HFCC are in agreement with experimental results using electron paramagnetic resonance measurements. (C) 2000 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000087545000005 L2 - RARE-EARTH COMPOUNDS; PRESSURE-DEPENDENCE; ABSORPTION-SPECTRA; MAGNETISM; PHOTOLUMINESCENCE; CLUSTERS; ENERGIES; FIELDS; RAMAN; AL SO - International Journal of Quantum Chemistry 2000 ;79(1):34-46 1598 UI - 15643 AU - Quintanilla-Martinez L AU - Kumar S AU - Fend F AU - Reyes E AU - Teruya-Feldstein J AU - Kingma DW AU - Sorbara L AU - Raffeld M AU - Straus SE AU - Jaffe ES AD - NCI, Pathol Lab, Hematopathol Sect, Bethesda, MD 20892, USANIAID, Clin Invest Lab, NIH, Bethesda, MD 20892, USAInst Nacl Nutr Salvador Zubiran, Dept Pathol, Mexico City, DF, MexicoGSF, Res Ctr Environm & Hlth, Inst Pathol, Neuherberg, GermanyJaffe, ES, NCI, Pathol Lab, Hematopathol Sect, Bldg 10,Room 2N202,10 Ctr Dr,MSC 1500, Bethesda, MD 20892 USA TI - Fulminant EBV+ T-cell lymphoproliferative disorder following acute/chronic EBV infection: a distinct clinicopathologic syndrome AB - This study describes the clinicopathologic features of 5 patients who developed a fulminant Epstein-Barr virus (EBV)-positive clonal T-cell lymphoproliferative disorder (LPD) after acute EBV infection. One additional patient developed a similar disorder in the setting of long-standing chronic active EBV infection. Detailed immunophenotyping, in situ hybridization for EBV early RNA-1 (EBER1) and polymerase chain reaction (PCR) analyses for immunoglobulin (Ig) heavy chain and T-cell receptor (TCR)-gamma gene rearrangements were performed on paraffin-embedded tissue from all patients. In addition, EBV strain typing and detection of the characteristic 30-bp deletion of the latent membrane protein-1 (LMP-1) gene were performed by PCR, Controls included 8 cases of uncomplicated infectious mononucleosis (IM). patients included 4 males and 2 females with a median age of 18 years (2-37 years). Three patients were Mexican, 2 were white, and 1 was of Asian descent. All presented with fever, hepatosplenomegaly, and pancytopenia; 5 were previously healthy, but had a clinical history of a recent viral-like upper respiratory illness (1 week to 2 months), and 1 patient had documented chronic active EBV infection for 7 years. Serologic data for EBV were incomplete but titers were either negative or only modestly elevated in 3 cases. In 1 case serology was consistent with severe chronic active EBV infection. In the remaining 2 cases serologic studies were not performed. All patients died within 7 days to 8 months of presentation with T-cell LPD. On histologic examination, the liver and spleen showed prominent sinusoidal and portal lymphoid infiltrates of CD3(+), beta F1(+), EBER1(+) T cells lacking significant cytologic atypia. Two cases were CD4(+), 2 cases were CD8(+), and 2 cases had admired CD4+ and CD8+ cells without clear subset predominance. All were TIA-1(+), CD56(-), Only rare B cells were noted. Marked erythrophagocytosis was present Molecular analysis revealed identical T-cell clones in 2 or more sites (liver, spleen, lymph node) in 5 cases. All patients carried type A EBV; 4 cases had wild-type EBV-LMP, and 2 showed the 30-bp deletion. This fulminant T-cell LPD after acute/chronic EBV infection is characterized by hepatosplenomegaly, often without significant lymphadenopathy, fever, liver failure, pancytopenia, and erythrophagocytosis indicative of a hemophagocytic syndrome, EBV serology may be misleading, with lack of elevated them, The presence of an EBER1(+) T-cell infiltrate with scant B cells should alert one to this diagnosis. Although cytologic atypia is minimal, studies for T-cell clonality confirm the diagnosis. (C) 2000 by The American Society of Hematology MH - Germany MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 67 U4 - Hematology U5 - J;Article AV - English IS - 0006-4971 UR - ISI:000088234800010 L2 - EPSTEIN-BARR-VIRUS; PROTEIN-1 ONCOGENE DELETIONS; NON-HODGKINS-LYMPHOMAS; REED-STERNBERG CELLS; HEMOPHAGOCYTIC SYNDROME; MONOCLONAL PROLIFERATION; GENE-EXPRESSION; DISEASE; MONONUCLEOSIS; ASSOCIATION SO - Blood 2000 ;96(2):443-451 1599 UI - 15536 AU - Quintanilla-Vega B AU - Hoover D AU - Bal W AU - Silbergeld EK AU - Waalkes MP AU - Anderson LD AD - Inst Politecn Nacl, CINVESTAV, Secc Toxicol Ambiental, Mexico City 07300, DF, MexicoNIEHS, NCI, Res Triangle Pk, NC 27709, USAUniv Maryland, Sch Med, Program Human Hlth & Environm, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Anat & Neurobiol, Baltimore, MD 21201, USAUniv Wroclaw, Dept Chem, PL-50138 Wroclaw, PolandNCI, Comparat Carcinogenesis Lab, FCRDC, Frederick, MD 21702, USAQuintanilla-Vega, B, Inst Politecn Nacl, CINVESTAV, Secc Toxicol Ambiental, POB 14-740, Mexico City 07000, DF, Mexico TI - Lead effects on protamine-DNA binding AB - Background Lead impairs male fertility and may affect offspring of exposed males, bur the mechanisms for this impairment are not completely cleat: Protamine P1 and P2 families pack and protect mammalian sperm DNA, Human HP2 is a zinc-protein and may have art important role in fertility. As lean has affinity for zinc-containing proteins, we evaluated its ability in vitro to bind to HP2 and its effects on HP2-DNA binding, Methods and Results UV/VIS spectroscopic data indicated that HP2 binds both Pb2+ and Zn2+ (as chloride salts). They also provided evidence that thiol groups mainly participate for Zn2+-binding; however HP2 has additional binding sites for Pb2+. The mobility shift assay showed that lead interaction with HP2 caused a dose-dependent decrease on HP2 binding to DNA, suggesting that lead may alter chromatin stability, Conclusions These in vitro results demonstrate that lead can interact with HP2 altering the DNA-protamine binding. This chemical interaction of lead with protamines may result in chromatin alterations, which in turn may lead to male fertility problems and eventually to DNA damage. Am. J. Ind. Med. 38:324-329, 2000. (C) 2000 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Poland MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 12 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0271-3586 UR - ISI:000088584300012 L2 - protamines;sperm chromatin;lead toxicity;reproductive toxicity;SPERM CHROMATIN; PROTEIN INTERACTIONS; EXPOSED HUMANS; P2 PROTAMINES; SEMEN QUALITY; METALS; MEN; RAT; REPRODUCTION; FERTILITY SO - American Journal of Industrial Medicine 2000 ;38(3):324-329 1600 UI - 15640 AU - Quintanilla-Vega B AU - Hoover DJ AU - Bal W AU - Silbergeld EK AU - Waalkes MP AU - Anderson LD AD - IPN, CINVESTAV, Secc Toxicol Ambiental, Mexico City 07360, DF, MexicoNIEHS, NCI, Res Triangle Pk, NC 27709, USAUniv Maryland, Sch Med, Program Human Hlth & Environm, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Anat & Neurobiol, Baltimore, MD 21201, USAUniv Wroclaw, Fac Chem, PL-50138 Wroclaw, PolandNCI, Comparat Carcinogenesis Lab, FCRDC, Frederick, MD 21702, USAQuintanilla-Vega, B, IPN, CINVESTAV, Secc Toxicol Ambiental, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Lead interaction with human protamine (HP2) as a mechanism of male reproductive toxicity AB - During spermatogenesis, histones are replaced by protamines, which condense and protect sperm DNA. In humans, zinc contributes to sperm chromatin stability and binds to protamine P2 (HP2). Chemical interactions with nuclear protamines, which prevent normal sperm chromatin condensation, may induce changes in the sperm genome and thus affect fertility and offspring development. Since lead has a high affinity for zinc-containing proteins, we investigated lead interactions with HP2 as a novel mechanism of its toxicity to sperm. UV/vis and CD spectroscopy results indicated that HP2 binds Pb2+ at two different sites, causing a conformational change in the protein. They also provided evidence that thiol groups are primarily involved in Zn2+ and Pb2+ binding to HP2 and that HP2 may have additional binding sites for Pb2+ not related to Zn2+. HP2 affinities for Pb2+ and Zn2+ were very similar, suggesting that Pb2+ can compete with or replace Zn2+ in HP2 in vivo. This interaction of lead with HP2 resulted in a dose-dependent decrease in the extent of HPS-DNA binding, although lead interaction with DNA also contributed to this effect. Therefore, the ability of lead to decrease the level of HP2-DNA interaction may result in alterations to sperm chromatin condensation, and thus in reduced fertility MH - Mexico|Distrito Federal MH - Poland MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Toxicology U5 - J;Article AV - English IS - 0893-228X UR - ISI:000088313500009 L2 - HUMAN-SPERM PROTAMINES; ZINC-FINGER PROTEINS; DNA STRAND BREAKS; P2 PROTAMINES; METAL-BINDING; IN-SITU; CHROMATIN; EXPOSURE; DECONDENSATION; DENATURATION SO - Chemical Research in Toxicology 2000 ;13(7):594-600 1601 UI - 15852 AU - Quiroga JA AU - Gonzalez-Cano A AD - Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainCtr Invest Opt, Guanajuato 37150, MexicoQuiroga, JA, Univ Complutense, Fac Ciencias Fis, Dept Opt, Ciudad Univ S-N, E-28040 Madrid, Spain TI - Separation of isoclinics and isochromatics from photoelastic data with a regularized phase-tracking technique AB - We present the application of a regularization algorithm to the processing of photoelastic fringe patterns. The method used is a modified regularized phase-tracking (RPT) algorithm applied to phase-shifted images. In particular, we present an algorithm for isoclinic-isochromatic separation that uses only five images. In the case of isoclinics the method can deal with problems associated with modulation of isochromatics and with isotropic points by means of a modified cost functional. With respect to the isochromatics the problems associated with regions of high fringe density are solved in a robust way by the unmodified RPT algorithm by use of the modulation information. The performance of the method is discussed, and experimental results are presented. (C) 2000 Optical Society of America. OCIS codes: 100.2650, 120.5050, 260.5430 MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000087606900009 L2 - ADAPTIVE QUADRATURE FILTERS; FRINGE-PATTERN IMAGES SO - Applied Optics 2000 ;39(17):2931-2940 1602 UI - 16263 AU - Quiroga JA AU - Gonzalez-Cano A AD - Ctr Invest Opt, Guanajuato 37150, MexicoUniv Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainQuiroga, JA, Ctr Invest Opt, Loma Bosque 115,Col Lomas Campestre, Guanajuato 37150, Mexico TI - Automatic determination of isostatics in two-dimensional photoelasticity AB - We present a method for automatic determination of isostatics from the photoelastic measurement of isoclinics obtained by phase-shifting techniques. The method is based on the integration of two difference equations by use of a multigrid algorithm, using a quality map obtained from experimental data by checking the consistency of the generated experimental differences. So-called isostatic sulfaces are determined and, from them, the isostatics net can be drawn with any prescribed density and resolution. The algorithm is very robust and fast and has proven very efficient for working with real photoelastic fringe patterns MH - Mexico|Guanajuato MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Multidisciplinary;Instruments & Instrumentation U5 - J;Article AV - English IS - 0957-0233 UR - ISI:000086238900013 L2 - photoelasticity;isostatics;phase shifting;multigrid;fringe-pattern analysis SO - Measurement Science & Technology 2000 ;11(3):259-265 1603 UI - 14593 AU - Quiroz-Barroso SA AU - Pojeta J AU - Sour-Tovar F AU - Morales-Soto S AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Paleontol, Mexico City 04510, DF, MexicoSmithsonian Inst, Museum Nat Hist, US Geol Survey, Washington, DC 20560, USAUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Taxco Viejo 40280, Guerrero, MexicoQuiroz-Barroso, SA, Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Paleontol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Pseudomulceodens: A Mississippian rostroconch from Mexico MH - Mexico|Distrito Federal MH - Mexico|Guerrero MH - USA PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 1 U4 - Paleontology U5 - J;Article AV - English IS - 0022-3360 UR - ISI:000166151500017 SO - Journal of Paleontology 2000 ;74(6):1184-1186 1604 UI - 15384 AU - Quiroz-Castro E AU - Bernes S AU - Barba-Behrens N AU - Tapia-Benavides R AU - Contreras R AU - Noth H AD - Natl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv A Estado de Hidalgo, Ctr Invest Quim, Pachuca Hidalgo 42074, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Munich, Inst Inorgan Chem, D-81377 Munich, GermanyBarba-Behrens, N, Natl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Structural and spectroscopic characterisation of tris(2-benzimidazolylmethyl)amine coordination compounds of Zn(II), Cd(II) and Hg(II) AB - Zinc(II), cadmium(II) and mercury(II) coordination compounds derived from tris(2-benzimidazolylmethyl)amine (ntb) were characterised by H-1 and C-13 NMR in solution, IR and X-ray single crystal diffraction for [Zn(ntb)Cl](2)[ZnCl4]. 4EtOH, [Cd(ntb)(mu(2)-NO3)]NO3. 2DMSO and [Hg(ntb)Cl](2)[HgCl4]. 4EtOH. The complexes derived from zinc(II), cadmium(II) and mercury(II) halides form [M(ntb)X](+) cations, where the metal ions are pentacoordinated and have a distorted trigonal bipyramidal geometry, with tetrahedral anions [MX4](2). In the [Cd(ntb)(mu(2)-NO3)]NO3. 2DMSO complex, by analogy with the Zn(II) and Hg(II) compounds, the NO3- could be considered as the fifth apical substituent in a distorted trigonal bipyramid geometry. In all complexes the ligand is coordinated to the metal through the imidazolic nitrogen atoms and has a weak coordination with the tertiary amine. The counter ion (halide or nitrate) remains bonded to the metal ion in solution and in the solid state as was evidenced by NMR and X-ray diffraction. The structures presented interactions between the coordinated counterion and the nearest C-H of the aromatic rings. All cations show an approximate C3 symmetry. The distortions found in the solid state were attributed to intermolecular hydrogen bonding and stacking between the benzimidazolic rings of neighbouring molecules. (C) 2000 Elsevier Science Ltd. All lights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Hidalgo PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000088923500009 L2 - zinc(II);cadmium(II);mercury(II);tris(2-benzimidazolylmethyl)amine;X-ray diffraction structures;NMR data;TRIPODAL LIGAND; TRIS(IMIDAZOLYLMETHYL)AMINE LIGANDS; MANGANESE(II) COMPLEXES; COPPER(II) COMPLEXES; ZINC-COMPLEXES; 5-COORDINATE; 6-COORDINATE; IMIDAZOLE SO - Polyhedron 2000 ;19(12):1479-1484 1605 UI - 15190 AU - Quiroz MA AU - Cordova F AU - Lamy-Pitara E AU - Barbier J AD - Fdn Univ Americas Puebla, Dept Quim & Biol, Puebla 72820, MexicoUniv Poitiers, Catalyse Chim Organ Lab, CNRS, UMR 6503, F-86022 Poitiers, FranceQuiroz, MA, Fdn Univ Americas Puebla, Dept Quim & Biol, Sta Catarina Martir S-N, Puebla 72820, Mexico TI - Electrocatalytic hydrogenation of m-xylene on platinized-platinum electrodes AB - The electrocatalytic hydrogenation of m-xylene (1,3-dimethylbenzene) was investigated at room temperature in 0.5 M H2SO4 solutions on a platinized-platinum (Pt/Pt) electrode. It was found that the hydrogenation process of m-xylene took place only in the potential region corresponding to the weakly adsorbed hydrogen (0 < E-H < 0.25 V) and that the electrocatalytic activity of the Pt/Pt electrode was dependent on the hydrogenation potential. The hydrogenation of m-xylene yielded steroisomeric product mixtures of the saturated 1,3-dimethylcyclohexane (1,3-DMCH), cis- and trans-1,3-DMCH. The cis/trans isomer ratio was found to be strongly dependent on the potential on which the hydrogenation of m-xylene has been carried out. These results were compared with those reported for the gas and liquid-phase catalytic hydrogenation of m-xylene and explained through a model of molecular reorientation dependent on the electrode potential. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000089551700025 L2 - m-xylene;hydrogenation;electrocatalytic activity;stereoselectivity;cis/trans Isomer ratio;LIQUID-PHASE HYDROGENATION; AQUEOUS SALT SOLUTION; RUTHENIUM CATALYSTS; BENZENE; ADSORPTION; ELECTROCHEMISTRY; ISOMERIZATION; CYCLOHEXENE; PALLADIUM; KINETICS SO - Electrochimica Acta 2000 ;45(25-26):4291-4298 1606 UI - 14413 AU - Rabinovich VS AU - Tarkhanov NN AU - Schulze BW AD - ESIME Zacatenco, Mexico City, DF, MexicoUniv Potsdam, Math Inst, Potsdam, GermanyRabinovich, VS, ESIME Zacatenco, Mexico City, DF, Mexico TI - Elliptic boundary value problems in domains with intersecting cuspidal edges MH - Germany MH - Mexico|Distrito Federal PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1064-5624 UR - ISI:000166681100026 SO - Doklady Mathematics 2000 ;62(3):401-405 1607 UI - 15893 AU - Raga A AU - Lopez-Martin L AU - Binette L AU - Lopez JA AU - Canto J AU - Arthur SJ AU - Mellema G AU - Steffen W AU - Ferruit P AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoUNAM, Inst Astron, Morelia 58090, Michoacan, MexicoStockholm Observ, SE-13336 Saltsjobaden, SwedenUniv Guadalajara, Inst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoUniv Maryland, Dept Astron, College Pk, MD 20742, USARaga, A, Univ Nacl Autonoma Mexico, Inst Astron, Ap 70-264, Mexico City 04510, DF, Mexico TI - The emergence of a neutral Herbig-Haro jet into a photoionized nebula AB - Recent observations show the existence of an increasing number of collimated outflows ejected by young, low-mass stars which are embedded in H II regions. At distances of a few tens of au from the star, at least one lobe of these outflows will be shielded from the ambient ionizing radiation by the compact, high-extinction circumstellar disc. Within these shielded regions, the jets are probably mostly neutral, similar to the jets in 'normal' Herbig-Haro (HH) objects. At larger distances, these jets emerge into the photoionized nebula, and start to be photoionized by the radiation from the ionizing photon source of the nebula. In this paper, we model the photoionization of an initially neutral HH jet. This process begins as an ionization front at the side of the jet, which is directed towards the ionizing star of the nebula, and progresses into the beam of the jet. There are two possible solutions. In the first solution, the jet beam becomes fully ionized through the passage of an R-type ionization front. In the second solution, the ionization front slows down enough to become a D-type front (or is already a D-type front at the point in which the jet emerges into the photoionized nebula), forming a partially ionized jet beam, with an expanding photoionized region and a compressed neutral region. We explore these two types of solutions both analytically and numerically, and discuss the observational effects introduced by this jet photoionization process, concentrating in a region of parameter space that straddles the parameters deduced for HH 444 (the jet from V 510 Orionis) MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Michoacan MH - Sweden MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000087480300005 L2 - hydrodynamics;stars : formation;HII regions;ISM : jets and outflows SO - Monthly Notices of the Royal Astronomical Society 2000 ;314(4):681-688 1608 UI - 15699 AU - Raga AC AU - Williams DA AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandRaga, AC, Natl Autonomous Univ Mexico, Inst Astron, Ap 70-264, Mexico City 04510, DF, Mexico TI - The morphology of clumps in molecular clouds excited by radiation from HH objects AB - We have investigated the influence of the radiation field from a Herbig-Haro object on a spherical clump, as the HH object passes by the clump. We have included a limited chemistry, and show column density maps of HCO+ and NH3 to represent the morphology of the predicted emission regions. The morphology is sensitive both to the orientation of the line of sight with respect to the HH trajectory and the clump, and to the extinction of the clump. Emission regions may appear barlike, are-like, or clump-like. The fractional abundances within these structures are observationally significant. However, the clump is not significantly heated by the radiation, and no clump evaporation occurs during the passage of the HH object for cases where the trajectory does not impact on the clump MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000088182700042 L2 - hydrodynamics;molecular processes;ISM : clouds;ISM : Herbig-Haro objects;HERBIG-HARO OBJECTS; LINE EMISSION MODELS; NONTHERMAL DESORPTION; HIGH-RESOLUTION; INTERSTELLAR; GRAINS; CO; DOWNSTREAM; EXCITATION; MECHANISM SO - Astronomy and Astrophysics 2000 ;358(2):701-707 1609 UI - 16683 AU - Raicheff R AU - Zaprianova V AD - IPN, CINVESTAV, Dept Appl Phys, Merida 97310, MexicoUniv Chem Technol & Met, Dept Electrochem & Corros, Sofia 1156, BulgariaRaicheff, R, IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Mexico TI - Effect of crystallization on the electrochemical corrosion behavior of some nickel-based amorphous alloys MH - Bulgaria MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000084457100002 L2 - HCL SO - Journal of Materials Science Letters 2000 ;19(1):3-5 1610 UI - 10906 AU - Ramanauskas R AU - Quintana P AU - Bartolo-Perez P AU - az-Ballote L AD - Inst Chem, LT-2600 Vilnius, LithuaniaCINVESTAV, IPN, Dept Appl Phys, Merida 97310, MexicoRamanauskas, R, Inst Chem, Gostauto 9, LT-2600 Vilnius, Lithuania TI - Effect of corrosion products on the atmospheric corrosion of electrodeposited zinc and zinc alloy coatings AB - The role of the corrosion products in the inhibition of Zn alloy coating corrosion has riot been considered fully to date. Atmospheric corrosion data on Zn, Zn-Fe, Zn-Co, and Zn-Ni electrodeposits exposure to marine and urban test sites of a humid, tropical climate during a 3-gear period revealed that Zn-Ni and Zn-Co coatings are more resistant than Zn and Zn-Fe. Corrosion products-formed on these samples have been characterized by x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). Sodium chlorhydroxysulfate (NaZn4Cl[OH](6)SO(4)(.)6H(2)O) and zinc hydroxychloride (Zn-5[OH](8)(Cl2H2O)-H-.) were determined to be the main constituent compounds of corrosion films formed in both test sites. It is assumed that the amorphous structure arid properties of the oxide phase may play an important role in determining coating corrosion resistance MH - Lithuania MH - Mexico|Yucatan PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000176353700003 L2 - atmospheric corrosion;electrodeposited coatings;x-ray diffraction;x-ray photoelectron spectroscopy;COATED STEEL; X-RAY; ZN; FILMS; NAZN4CL(OH)6SO4.6H2O; ZN4CL2(OH)4SO4.5H2O; RESISTANCE SO - Corrosion 2000 ;56(6):588-597 1611 UI - 14971 AU - Ramirez-Bautista A AU - Balderas-Valdivia C AU - Vitt LJ AD - UNAM, Escuela Nacl Estud Profes Iztacala, Ecol Lab, Unidad Biol Tecnol & Prototipos, Tlalnepantla 54090, Edo De Mexico, MexicoUniv Oklahoma, Dept Zool, Normam, OK 73072, USAUniv Oklahoma, Sam Noble Oklahoma Museum Nat Hist, Norman, OK 73072, USAVitt, LJ, UNAM, Escuela Nacl Estud Profes Iztacala, Ecol Lab, Unidad Biol Tecnol & Prototipos, Av Los Barrios S-N,AP 314, Tlalnepantla 54090, Edo De Mexico, Mexico TI - Reproductive ecology of the whiptail lizard Cnemidophorus lineatissimus (Squamata : Teiidae) in a tropical dry forest AB - We studied the reproductive ecology of the teiid lizard Cnemidophorus lineatissimus during 1993 and 1994 near Chamela, Jalisco, Mexico. We estimate that males reached sexual maturity at a snout-vent length (SVL) of 51 mm and an age of five months, and females reached sexual maturity at a SVL of 62 mm and an age of seven months. Testicular mass increased from April to July, reaching maximal size between August and December, and decreased in January of the next year. Gonads of females began to increase in mass during June when vitellogenesis occurred. They reached maximum mass from July to November when most egg production occurred. Some egg production occurred in January as well. The reproductive season for males and females is extended, similar to many other tropical lizards. Mean crutch size was 4.1 +/- 0.2 eggs. Clutch size was correlated with female size, but egg size and relative clutch mass remained constant among females and between pars. Mean clutch size and female body condition were lower in 1993 compared to 1994, presumably reflecting the effects of annual variation in resource availability on females. Proximal climatic factors influence the timing and intensity of reproduction in C. lineatissimus, but the historical effect of foraging mode on teiid lizard morphology constrains relative clutch mass. Sexual dimorphism is evident with males reaching larger size than females, and seasonal variation in mean SVL in both sexes suggests that much of the population is replaced annually MH - Mexico|Estado De Mexico MH - USA PB - CHARLESTON: AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS RP - NOT IN FILE U3 - TC 14 U4 - Zoology U5 - J;Article AV - English IS - 0045-8511 UR - ISI:000165053800006 L2 - RELATIVE CLUTCH MASS; SEXUAL DIMORPHISM; FOOD AVAILABILITY; EUMECES-LATICEPS; MEXICO; SELECTION; BIOLOGY; SIZE; PHRYNOSOMATIDAE; STRATEGIES SO - Copeia 2000 ;(3):712-722 1612 UI - 16164 AU - Ramirez-Romero R AU - Brogden KA AD - Univ Autonoma Nuevo Leon, Fac Med Vet & Zootecnia, Dept Patol, Monterrey 64930, NL, MexicoARS, Resp & Neurol Dis Res Unit, Natl Anim Dis Ctr, USDA, Ames, IA 50010, USARamirez-Romero, R, Iowa State Univ Sci & Technol, Coll Vet Med, Dept Vet Pathol, Ames, IA 50011 USA TI - The potential role of the Arthus and Shwartzman reactions in the pathogenesis of pneumonic pasteurellosis AB - Pneumonic pasteurellosis (PP) is an economically important disease in cattle, sheep, and goats. Pasteurella haemolytica is commonly isolated from the severe fibrinopurulent pneumonia that characterize this respiratory syndrome. During infection, the bacteria produce leukotoxin (LKT) and lipopolysaccharide (LPS), both potent inducers of inflammation. Nonetheless, it has also been demonstrated that an exacerbated host's inflammatory response is responsible for the severe lung damage. Despite research in this field, the pathogenesis of PP is still incomplete. Two classical models of acute inflammatory response induced in laboratory animals, the Arthus and Shwartzman reactions, could explain the pathogenesis of the severe lung lesions that characterize PP MH - USA MH - Mexico|Nuevo Leon PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 8 U4 - Cell Biology;Immunology U5 - J;Article AV - English IS - 1023-3830 UR - ISI:000086533000002 L2 - Pasteurella haemolytica;pathogenesis;Arthus reaction;Shwartzman reaction;HAEMOLYTICA A1-DERIVED ENDOTOXIN; BOVINE RESPIRATORY-DISEASE; SHIPPING FEVER PNEUMONIA; NECROSIS-FACTOR-ALPHA; ACUTE LUNG INJURY; PULMONARY INFLAMMATION; CALVES; LIPOPOLYSACCHARIDE; SHEEP; PASTEURELLA-HAEMOLYTICA-A1 SO - Inflammation Research 2000 ;49(3):98-101 1613 UI - 14296 AU - Ramirez-Saad HC AU - Sessitsch A AU - de Vos WM AU - Akkermans ADL AD - Wageningen Univ, Microbiol Lab, NL-6703 CT Wageningen, NetherlandsUniv Autonoma Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City, DF, MexicoAustrian Res Ctr Seibersdorf, Dept Life Sci, Seibersdorf, AustriaAkkermans, ADL, Wageningen Univ, Microbiol Lab, Hesselink Suchtelenweg 4, NL-6703 CT Wageningen, Netherlands TI - Bacterial community changes and enrichment of Burkholderia-like bacteria induced by chlorinated benzoates in a peat-forest soil-microcosm AB - Bacterial community shifts in a peat-forest soil spiked with 3-chlorobenzoate (3CBA) or 2,5-dichlorobenzoate (2,5DCB) were monitored by PCR-amplification of the V6 to V8 regions of the 16S rRNA and rDNA, followed by separation of the amplicons by temperature gradient gel electrophoresis. 3CBA disappeared to non-detectable levels after 15 days by a biologically mediated process, while 2,5DCB remained at the initial concentration values. The experiments were conducted under microcosms sl stems. Addition of the chlorinated benzoates to the soil resulted in a rapid decrease of the microbial diversity, as judged by a time-dependent reduction in the number of amplicons detected by temperature gradient gel electrophoresis. Few amplicons specifically enriched in the spiked soils were cloned and characterised by sequence analysis. The identity of the cloned DNA and the corresponding soil amplicons was confirmed by hybridisation with a radioactively labelled V6-probe. Analysis of the 16S rDNA sequences indicated that Burkholderia-related bacteria dominated the enriched soil populations under 3CBA stress. In addition, enrichment cultures growing on 3CBA as sole C-source were obtained from the respective spiked soil, which were found to contain bacteria with identical 16S rDNA sequences as those induced by 3CBA stress in soil MH - Austria MH - Mexico|Distrito Federal MH - Netherlands PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0723-2020 UR - ISI:000166961000017 L2 - TGGE;16S rRNA;chlorobenzoate;bacterial community;soil;microcosm;Burkholderia;GRADIENT GEL-ELECTROPHORESIS; 16S RIBOSOMAL-RNA; MICROBIAL-POPULATIONS; GENETIC DIVERSITY; GRASSLAND SOILS; FRANKIA STRAINS; DNA FRAGMENTS; SEQUENCE; 3-CHLOROBENZOATE; BIODEGRADATION SO - Systematic and Applied Microbiology 2000 ;23(4):591-598 1614 UI - 14967 AU - Ramirez-Solis A AU - Daudey JP AD - Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoUniv Toulouse 3, IRSAMC, Phys Quant Lab, CNRS,UMR, F-31062 Toulouse, FranceRamirez-Solis, A, Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - The spectroscopy of AgF: CASSCF+CASPT2 calculations on the lowest (3)Sigma(+), (1)Sigma(+), (3)Pi, (1)Pi, (3)Delta, and (1)Delta excited states AB - The spectroscopic properties of the three lowest-lying (X,2 and 3)(1)Sigma (+), the first (3)Sigma (+), the two lowest-lying (1 and 2)(3)Pi, the first (1)Pi, and the (3,1)Delta states of the AgF molecule have been studied through extensive CASSCF (complete active space self-consistent field)+CASPT2 (complete active space second-order perturbational) calculations, using a 19-active-electron relativistic effective core potential for Ag and large Gaussian basis sets for both atoms. Strong mixtures of the Ag+(4d(9)5s(1))F-(2s(2)2p(6)) ionic and Ag(4d(9)5s(2))F(2s(2)2p(5)) or Ag(4d(10)5s(1))F(2s(2)2p(5)) neutral configurations were found for the (3)Sigma (+), 2 (1)Sigma (+), and 1 (3)Pi states between 4.0 and 4.4 a.u., while for the higher lying states no evident neutral-ionic crossings were found. This leads to curves that present local maxima at 4.3 a.u. for the 2 (1)Sigma (+) and (3)Sigma (+) states as well as for the 1 (3)Pi state at 4.0 a.u. The 2 (3)Pi excited state shows the lowest ionic character of all the states. The calculated spectroscopic constants for all the studied states are reported and found in good accordance with available experimental data. The question of the nature of the electronic parent state of the observed B0(+) state, responsible for the most intense transition and which is the shortest lived excited state of AgF, is thoroughly addressed in the light of the present results. They clearly indicate that the B0(+) state is not correlated with the Rydberg Ag+(4d(9)5p(1))+F-(2s(2)2p(6)) ionic structure, as previously proposed [J. Chem. Phys. 102, 4482 (1995)]. Since the 2 (1)Sigma (+) state has been shown to be the LambdaS Sigma electronic parent state of the fine-structure A0(+) state (these results confirm this idea), and given the difference between the calculated T-e (1513 cm(-1)) of the 2 (1)Sigma (+) and 1 (3)Pi states, these calculations point to this latter state as the LambdaS Sigma parent of the experimental B0(+) state. At this level of calculation, the next higher lying state that could contribute (3 (1)Sigma (+)) through spin-orbit couplings to this B0(+) state lies more than 8000 cm(-1) away. This, however, is not consistent with the accurately measured radiative lifetimes of 7.1 mus (A'Omega1), 9.1 mus (a Omega1), 240 ns (A0(+)), 21 ns (B0(+)) for the four observed excited states, which seem to indicate that the two Omega =0(+) excited states are of singlet character. Therefore, only a theoretical study including a substantially more accurate and complete account of the electronic+spin-orbit interactions will yield a reliable answer to this complex problem in the spectroscopy of AgF. (C) 2000 American Institute of Physics. [S0021-9606(00)30543-8] MH - France MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000165083500021 L2 - LYING ELECTRONIC STATES; RADIATIVE LIFETIMES; CUF; ATOMS; CUCL SO - Journal of Chemical Physics 2000 ;113(19):8580-8588 1615 UI - 15006 AU - Ramirez-Vargas E AU - Navarro-Rodriguez D AU - Medellin-Rodriguez FJ AU - Huerta-Martinez BM AU - Lin JS AD - UAC, Fac Quim, Programa Interinst Posgrado, Saltillo 25270, Coahuila, MexicoCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUASLP, FCQ, CIEP, San Luis Potosi 78210, MexicoOak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831, USARamirez-Vargas, E, UAC, Fac Quim, Programa Interinst Posgrado, Blvd V Carranza & Jose Cardenas Valdes, Saltillo 25270, Coahuila, Mexico TI - Morphological and mechanical properties of polypropylene [PP]/poly(ethylene vinyl acetate) [EVA] blends. I. Homopolymer PP/EVA systems AB - Morphological and mechanical properties of polypropylene [PP]/poly(ethylene vinyl acetate) [EVA] blends have been studied. Infrared results using thin films first indicated a transition toward compatibility between both components at concentrations above 40% EVA. The transition was verified with different experimental techniques and it was associated to morphological changes and mechanical properties. The PP/EVA blends were mechanically evaluated in terms of impact and tensile strength to determine the influence of blending on the performance properties of these materials. Agreement was found between the transition and the enhancement of both elongation at break and impact strength MH - Mexico|Coahuila MH - Mexico|San Luis Potosi MH - USA PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0032-3888 UR - ISI:000090072200013 L2 - SMALL-ANGLE SCATTERING; LAMELLAR 2-PHASE SYSTEMS; X-RAY-SCATTERING; MELTING BEHAVIOR; ETHYLENE; COPOLYMER; CRYSTALLIZATION; POLYETHYLENE SO - Polymer Engineering and Science 2000 ;40(10):2241-2250 1616 UI - 15578 AU - Ramirez F AU - Cota E AU - Ulloa SE AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana, BC, MexicoUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USARamirez, F, Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana, BC, Mexico TI - Coulomb coupling and the role of symmetries in quantum-dot arrays for cellular automata AB - Using a group-theoretical analysis of the symmetries of a quantum dot array, we investigate the role of defects on the energetics of the system and the resulting charge configurations (or polarization of the cell). We find that for the typical four- or five-element geometries proposed, even small asymmetries introduced by defects in the system, or variations in the local electrostatic environment, can give rise to large effects on the polarization of the ground state and the corresponding low-energy excitations. These shifts art: likely to produce important effects in the operation of the cellular automata proposed using these quantum dots, in particular, we find that the sensitivity to polarization changes induced by a driver cell decreases dramatically, and the polarization values are no longer fully defined. These effects would both force the use of stronger driving fields, and may also complicate the dynamical behavior of the cellular automata MH - Mexico|Baja California MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000088335600081 L2 - HALL REGIME; SPECTROSCOPY; ELECTRONS; ISLAND; CELLS; ATOMS SO - Physical Review B 2000 ;62(3):1912-1920 1617 UI - 15554 AU - Ramirez JA AU - Martin-Polo MO AU - Bandman E AD - Univ Autonoma Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, Queretaro, Qro, MexicoUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USARamirez, JA, Univ Autonoma Tamaulipas, Dept Ciencia & Tecnol Alimentos, Unidad Acad Multidisciplinaria Reynosa Azlan, AP 1015 Reynosa, Tamaulipas 88000, Mexico TI - Fish myosin aggregation as affected by freezing and initial physical state AB - Fish myosin obtained from Tilapia nilotica was solubilized in 20 mM Tris-HCl, pH 7.0, with 0.6 M KCl (solution model system), or suspended without salt (suspension model system). Changes in % soluble protein, Ca2+-ATPase activity, and total and reactive -SH groups during frozen storage were evaluated. Frozen induced aggregation of fish myosin showed different behavior depending upon its initial physicochemical state. When myosin was solubilized prior to frozen storage, head-to-head interactions seemed to be more involved in protein aggregation with a strong participation of disulfide bonds. On the contrary, a preferentially side-to-side mechanism might be involved in the aggregation of myosin upon suspension, with a minor interaction of -SH groups MH - Mexico|Queretaro MH - Mexico|Tamaulipas MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 23 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000088460100001 L2 - fish myosin;aggregation;frozen stability;-SH groups;ATPase activity;HEAT-INDUCED GELATION; TWITCH RABBIT MUSCLES; FROZEN STORAGE; CHANOS-CHANOS; DENATURATION; MYOFIBRILS; STABILITY; PROTEINS; SURIMI SO - Journal of Food Science 2000 ;65(4):556-560 1618 UI - 15596 AU - Ramirez JA AU - Rodriguez-Sosa R AU - Morales OG AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tampaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoUniv Autonoma Tamaulipas, Inst Ecol & ALimentos, Cd Victoria 87040, Tamaulipas, MexicoVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Campus Lugo, Lugo 27002, Spain TI - Surimi gels from striped mullet (Mugil cephalus) employing microbial transglutaminase AB - Striped mullet (Mugil cephalus) is an abundant marine coastal fish of tropical waters and has a low commercial value. This work deals with the assessment of striped mullet as a resource for surimi gels. To improve the gels obtained, the addition of microbial transglutaminase was evaluated, Optimal conditions for setting were determined using mathematical models. Concentration of microbial transglutaminase (MTGase), temperature and time were studied to improve the mechanical properties of surimi gels from striped mullet. Shear stress was strongly affected by the variables studied while shear strain was moderately affected. Maximum shear stress (156 kPa) was obtained by employing the following setting conditions: a concentration of MTGase of 9.3 g/kg of surimi, a temperature of 37 degrees C and a time of 3.9 h. Under these conditions the shear strain was 1.34. Maximum shear strain (1.57) was obtained by employing the following conditions: a concentration of MTGase of 5 g/kg of surimi, a temperature of 34.5 degrees C and a time of 1 h. Under these conditions the shear stress was 123 kPa. (C) 2000 Published by Elsevier Science Ltd MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000088339100003 L2 - RESPONSE-SURFACE METHODOLOGY; DIFFERENTIAL SCANNING CALORIMETRY; ATLANTIC CROAKER; ALASKA POLLOCK; FISH MUSCLE; STABILITY; MYOSIN; OPTIMIZATION; GELATION; CULTURE SO - Food Chemistry 2000 ;70(4):443-449 1619 UI - 15615 AU - Ramirez MD AU - Toscano RA AU - Arnason J AU - Omar S AU - Cerda-Garcia-Rojas CM AU - Mata R AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Dept Farm, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Ottawa, Dept Biol, Ottawa, ON K1N 6N5, CanadaCerda-Garcia-Rojas, CM, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - Structure, conformation and absolute configuration of new antifeedant dolabellanes from Trichilia trifolia AB - The structures of three new dolabellane diterpenoids, (1R,3E,7Z,11S,12S)-dolabella-3,7,18-trien-17-oic acid (1), (1R,3E,6R,7Z,11S,12S)-dolabella-3,7,18-trien-6,17-olide (2) and (1R,3S,4R,7Z,11S,12S)-3-hydroxydolabella-7,18-dien-4,17-olide (3), isolated from the wood of Trichilia trifolia, were elucidated by 1D and 2D NMR spectroscopy. The stereochemistry of 1 and 2 was confirmed by X-ray diffraction analysis, while that of 3 was ascertained from NOESY data. Comparison between experimental and calculated H-1-H-1 vicinal coupling constants and the analysis of molecular mechanics structures revealed that the 11-membered ring of 1 and 2 exists in a conformational equilibrium in solution, while in 3 this ring possesses a more rigid structure. The absolute configuration of 3 was established from its Cotton effects. Dolabellanes 1-3 caused significant feeding reduction by the rice weevil Sitophilus oryzae. (C) 2000 Published by Elsevier Science Ltd MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000088199900004 L2 - dolabellanes;diterpenes;Trichilia trifolia;conformation;configuration;X-ray crystal structures;antifeedants;MELIACEAE; BOTANICALS; PIPERACEAE; DITERPENES; LIMONOIDS SO - Tetrahedron 2000 ;56(29):5085-5091 1620 UI - 16133 AU - Ramirez S AU - Viniegra M AU - Dominguez JM AU - Schacht P AU - De Menorval LC AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, STI, Programa Simulac Mol, Mexico City 07730, DF, MexicoInst Mexicano Petr, Gerencia Catalizadores, Mexico City 07730, DF, MexicoENSCM, Lab Mat Catalyt & Catalyse Chim Organ, CNRS, UMR 5618, F-34296 Montpellier 05, FranceRamirez, S, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Av Michoacan & Purisima S-N, Mexico City 09340, DF, Mexico TI - n-heptane reforming over Pt supported on beta zeolite exchanged with Cs and Li cations AB - The physicochemical and catalytic properties of platinum supported on beta zeolite both acid and exchanged with Cs and Li cations were characterized by X-ray diffraction, NH3-TPD, FTIR of adsorbed pyridine and CO, DSC, mass spectrometry and hydrogen chemisorption. The n-heptane conversion was performed to assess the selectivity variations in the exchanged solids. A high metal dispersion was verified in all of the catalysts, varying from 54 up to 81%. The FTIR of adsorbed CO revealed a shift towards lower frequencies for Pt on exchanged zeolite with respect to Pt on the acid zeolite, indicating that the basic character of Cs and Li enhance the electron donation from the support to the metal. The acid-base properties of the exchanged materials influence their selectivity for the catalytic conversion of n-heptane at 663 K and 1 atm, showing that Cs promotes the aromatization reactions while Li promotes isomerization and cracking. The cracking activity followed the acid/metal ratio for all of the catalysts studied MH - France MH - Mexico|Distrito Federal PB - BUSSUM: BALTZER SCI PUBL BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000086707700005 L2 - Pt;beta zeolite;ion exchange;n-heptane reforming;CATALYSTS; ISOMERIZATION; PLATINUM; HEXANE; AROMATIZATION SO - Catalysis Letters 2000 ;66(1-2):25-32 1621 UI - 16430 AU - Ramirez S AU - Dominguez JM AU - Viniegra M AU - De Menorval LC AD - Univ Autonoma Metropolitana, Dept Quim, Mexico City, DF, MexicoInst Mexicano Petr, STI, Programa Simulac Mol, Mexico City 07730, DF, MexicoENSCM, Lab Mat Catalyt & Catalyse Chim Organ, CNRS, UMR 5618, F-34296 Montpellier 05, FranceRamirez, S, Univ Autonoma Metropolitana, Dept Quim, Av Michoacan & Purisima S-N, Mexico City, DF, Mexico TI - Specific behavior of beta-zeolites upon the modification of the surface acidity by Cs and Li exchange AB - A study on the modification of the surface acidity of beta zeolite exchanged with Cs and Li was carried out by means of X-ray diffraction, nitrogen adsorption (BET), Al-27-MAS-NMR, (Cs-133, Li-6)-MAS-NMR, surface paramagnetic shift (SUPAS) with adsorbed O-2, FTIR of adsorbed pyridine and NH3-TPD. An inverse correlation between the amount of cations exchanged and the number of acid sites was verified, as well as a gradual decrease of the micropore surface area, i.e. a 38% negative variation for the fully exchanged solids Z beta Cs2 and Z beta Li3. The Cs-133 and Li-6 (SUPAS)-MAS-NMR technique suggested that Cs cations were located in accessible sites, while Li cations were inaccessible and possibly located in cavities within the channels network. The crystallinity of the original beta zeolite was modified slightly after the ion exchange and no trace of amorphous material was detected by XRD and Al-27-MAS-NMR techniques. By means of NH3-TIPD it was found that at similar cation molar concentrations the number of acid sites was about 4 times higher for Li-exchanged zeolites, therefore Cs showed a stronger neutralization power of the acid sites MH - France MH - Mexico|Distrito Federal PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1144-0546 UR - ISI:000085695900011 L2 - NMR; CATALYSTS; CRYSTALLIZATION; AROMATIZATION; PYRIDINE; ALUMINUM; HEXANE SO - New Journal of Chemistry 2000 ;24(2):99-104 1622 UI - 15802 AU - Ramos-Casals M AU - Cervera R AU - Garcia-Carrasco M AU - Vidal J AU - Trejo O AU - Jimenez S AU - Costa J AU - Font J AU - Ingelmo M AD - Univ Barcelona, Sch Med, Hosp Clin Barcelona, IDIBAPS,Unitat Malalties Autoimmunes Sistem, E-08036 Barcelona, Catalonia, SpainUniv Barcelona, Sch Med, Hosp Clin Barcelona, IDIBAPS,Dept Microbiol, E-08036 Barcelona, Catalonia, SpainUniv Barcelona, Sch Med, Hosp Clin Barcelona, IDIBAPS,Dept Med, E-08036 Barcelona, Catalonia, SpainUniv Autonoma Puebla, Sch Med, Rheumatol Unit, Puebla 72570, MexicoFont, J, Univ Barcelona, Sch Med, Hosp Clin Barcelona, IDIBAPS,Unitat Malalties Autoimmunes Sistem, C Villarroel 170, E-08036 Barcelona, Catalonia, Spain TI - Cytopenia and past human parvovirus B19 infection in patients with primary Sjogren's syndrome AB - Objectives: To determine the clinical significance of human parvovirus B19 infection in patients with primary Sjogren's syndrome (SS) and to investigate the immunologic and hematologic features related to B19 infection. Methods: We included 80 consecutive patients with primary SS (74 women and 6 men), with a mean age of 62 years (range, 24 to 87 years) that were seen in our Unit. All patients fulfilled the European Community criteria for SS. As controls, we included 140 consecutive sera samples analyzed for B19 antibodies in our Microbiology Department and obtained from adult inpatients and outpatients of our Hospital. Serum from all patients and controls was tested for antibodies to B19 by enzyme-linked immunosorbent assay (ELISA). Additionally, the presence of B19 DNA in serum and in circulating leukocytes was investigated by nested polymerase chain reaction (PCR). Results: Serological evidence of past B19 infection (positive IgG antibodies without IgM antibodies) was present in 28 (35%) patients with primary SS, None of these patients showed evidence for B19 viremia, and B19 virus DNA was not detected in the circulating leukocytes of IgG-B19(+) patients. Positivity for IgM antibodies to B19 was not detected in any patient. When compared with patients without evidence of past B19 infection, those with primary SS and past B19 infection showed a higher prevalence of cytopenia (57% v 15%; P < .001), and, specifically, of leukopenia (36% v 4%; P < .001). Additionally, when compared with controls positive for lgG-B19, SS patients with these antibodies had a higher prevalence of cytopenia (57% v 13%; P < .001), leukopenia (36% v 3%; P < .001) and thrombocytopenia (21% v 0%; P = .003). Conclusions: Serological evidence of past B19 infection is associated with the presence of cytopenia in our patients with primary SS. A possible relationship between B19 infection and the presence of cytopenia in primary SS may occur in some patients immunologically or genetically predisposed. Copyright (C) 2000 by W.B. Saunders Company MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 12 U4 - Rheumatology U5 - J;Review AV - English IS - 0049-0172 UR - ISI:000087746600005 L2 - Sjogren's syndrome;cytopenia;human parvovirus B19;BONE-MARROW; DNA; AUTOANTIBODIES; PERSISTENCE; INVITRO; CELLS; SERA SO - Seminars in Arthritis and Rheumatism 2000 ;29(6):373-378 1623 UI - 16226 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Cervera R AU - Gaya J AU - Halperin I AU - Ubieto I AU - Aymami A AU - Morla RM AU - Font J AU - Ingelmo M AD - Univ Barcelona, Hosp Clin, Unitat Malalties Autoimmunes Sistemiques, Sch Med, E-08036 Barcelona, SpainUniv Barcelona, Hosp Clin, Hormonal Lab, Sch Med, E-08036 Barcelona, SpainUniv Barcelona, Hosp Clin, Dept Endocrinol, Sch Med, E-08036 Barcelona, SpainUniv Barcelona, Hosp Clin, Inst Invest Biomed August Pi & Sunyer, Sch Med,Dept Med, E-08036 Barcelona, SpainCAP Molins Rei, Barcelona, Catalonia, SpainBenemerita Univ, Sch Med, Dept Rheumatol MG C, Puebla, MexicoCervera, R, Univ Barcelona, Hosp Clin, Unitat Malalties Autoimmunes Sistemiques, Sch Med, C Villarroel 170, E-08036 Barcelona, Spain TI - Thyroid disease in primary Sjogren syndrome - Study in a series of 160 patients MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 30 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000086326400004 L2 - CLINICAL-SIGNIFICANCE; PREVALENCE; COMMUNITY; ANTIBODIES; DISORDERS SO - Medicine 2000 ;79(2):103-108 1624 UI - 16131 AU - Ramos-Fernandez G AU - Nunez-de la Mora A AU - Wingfield JC AU - Drummond H AD - Univ Penn, Dept Biol, Philadelphia, PA 19104, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 70275, DF, MexicoUniv Washington, Dept Zool, Seattle, WA 98195, USARamos-Fernandez, G, Pronatura Peninsula Yucatan, Calle 17,188-A,Col Garcia Gineres, Merida 97070, Yucatan, Mexico TI - Endocrine correlates of dominance in chicks of the blue-footed booby (Sula nebouxii): testing the Challenge Hypothesis AB - Two-chick broods of the blue-footed booby develop a dominance relationship during the junior chick's first 2 weeks of life, when behaviour of the subordinate chick is conditioned through aggression by its 4-day-older sibling. We used natural and experimental situations to test the Challenge Hypothesis, which predicts a rise in testosterone to regulate aggression only in socially unstable situations, and to investigate the role of corticosterone in the development of submissive behaviour in subordinates. In unmanipulated broods during the first 12 days, we found no differences among singletons, dominants and subordinates in testosterone levels, and corticosterone levels did not differ significantly. In experimental pairings of singleton/dominant and singieton/subordinate, testosterone was not detected and corticosterone increased significantly in dominants and singletons, but not in subordinates. These results indicate that the Challenge Hypothesis does not apply to these young birds. Whether or not circulating corticosterone regulates aggression in chicks awaits further experimentation MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - FLORENCE: UNIVERSITA DEGLI STUDI DI FIRENZE RP - NOT IN FILE U3 - TC 21 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0394-9370 UR - ISI:000086689700003 L2 - hormones;dominance;aggression;Challenge Hypothesis;testosterone;corticosterone;birds;STEROID-HORMONES; LUTEINIZING-HORMONE; TESTOSTERONE; AGGRESSION; NESTLINGS; PLASMA; BIRDS SO - Ethology Ecology & Evolution 2000 ;12(1):27-34 1625 UI - 15629 AU - Ramos-Lara F AU - Jaque D AU - Garcia-Sole J AU - Caldino U AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainRamos-Lara, F, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico TI - Up-conversion luminescence in the Ca3Ga2Ge3O12 : Nd3+ laser garnet crystal AB - The infrared to visible luminescence of the Nd3+ ion in the Ca3Ga2Ge3O12:Nd garnet crystal at different Nd concentrations has been investigated in the excitation spectral range corresponding to diode pumping (720-840 nm) under continuous wave and pulsed pumping. Three visible bands centred at 541, 601 and 677 nm were observed, these emissions mainly departing from the excited state (4)G(7/2). By using a simple rate equation model to fit the experimental data, it was possible to infer that this excited state is populated via up-conversion energy transfer between Nd3+ ions in the garnet crystal MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Letter AV - English IS - 0953-8984 UR - ISI:000088232300004 L2 - EXCITED-STATE ABSORPTION; ENERGY-TRANSFER; ND3+; MULTISITES; RADIATION SO - Journal of Physics-Condensed Matter 2000 ;12(26):L441-L449 1626 UI - 14517 AU - Ramos EP AU - De la Riva LS AU - Campbell JA AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Museum Zool, Mexico City 04510, DF, MexicoUniv Texas, Dept Biol, Arlington, TX 76019, USARamos, EP, Univ Nacl Autonoma Mexico, Fac Ciencias, Museum Zool, Apartado Postal 70-399, Mexico City 04510, DF, Mexico TI - A new allopatric species of Xenosaurus (Squamata : Xenosauridae) from Guerrero, Mexico AB - We describe a new species of Xenosaurus from the state of Guerrero, Mexico. This species differs from its congeners by characteristics of lepidosis and color pattern. The posterior border of the nuchal collar extends transversely across the middle of the neck, the dark dorsal bands are mottled in adults, and the venter has transverse series of dark scales extending to about mid-venter. The supraorbital semicircles are separated by two scales, the dorsal tubercles are low; and flat and separated from each other by a distance of 2-4 tubercle diameters, and there are 33-37 transverse ventral scale rows. The type-localty of the new species is isolated, from the geographically most proximate population of Xenosaurus by about 250 km MH - Mexico|Distrito Federal MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000166311200009 L2 - Reptilia;Squamata;Xenosauridae;Xenosaurus penai;new species;Sierra de Malinaltepec;Guerrero;Mexico;allopatry SO - Herpetologica 2000 ;56(4):500-506 1627 UI - 15920 AU - Ramos JE AU - Del Rio F AU - Mclure IA AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, EnglandRamos, JE, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apdo 55 534, Mexico City 09340, DF, Mexico TI - Accurate effective potentials and virial coefficients in real fluids. Part III. Alkanes and perfluoroalkanes AB - The approximate nonconformal (ANC) theory recently proposed has been applied very successfully to the determination of interaction pair potentials for the noble gases, homodiatomics and their mixtures. The ANC theory is used here to obtain effective angle-averaged potentials of all those n-alkanes and perfluoroalkanes for which experimental second virial coefficient data are available. The effective parameters conform to theoretical models based on spherocylinders and site-site chain molecules. The critical volumes and temperatures of these gases vary smoothly when scaled with parameters of the ANC potential. Further, the ANC model with only three parameters for each substance is able to reproduce the experimental data B-exp(T) of the second virial coefficient within experimental uncertainty for all 14 gases for which B-exp(T) has been reported MH - United Kingdom MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000087369000009 L2 - NOBLE-GASES; NONCONFORMAL POTENTIALS; INTERMOLECULAR FORCES; LINEAR 1-ALKANOLS; POLYATOMIC GASES; MOLECULAR FLUIDS; BINARY-MIXTURES; N-ALKANES; 2ND; SOUND SO - Physical Chemistry Chemical Physics 2000 ;2(12):2731-2741 1628 UI - 16067 AU - Ramos LHM AU - McGuire MR AU - Wong LJG AU - Castro-Franco R AD - UANL, FCB, Dept Microbiol & Inmunol, Monterrey 66450, NL, MexicoUSDA ARS, Peoria, IL 61604, USAUniv Autonoma Chapingo, Bermejillo, Dgo, MexicoRamos, LHM, UANL, FCB, Dept Microbiol & Inmunol, AP 2790, Monterrey 66450, NL, Mexico TI - Evaluation of pectin, gelatin and starch granular formulations of Bacillus thuringiensis AB - Novel formulations for Bacillus thuringiensis (Berliner) were tested using bioassay methods in the laboratory and greenhouse. Granular formulations were made with gelatin, pectin or cornstarch, each with and without Congo red (i.e., a solar protectant). B. thuringiensis strain GM-7 was grown under liquid culture conditions and used in ail formulations. Artificial sunlight caused reduction in spore viability within 30 min of exposure. Within 1 h of exposure, formulations made with gelatin protected spores better than formulations made with starch or pectin. Insecticidal activity was not reduced as quickly, nor were differences among treatments quite so obvious. Formulations containing Congo red protected spores and insecticidal activity better than formulations without Congo red. When Trichoplusia iii (Hubner) neonates were placed on cotton plants treated with granules, no differences in defoliation occurred over three weeks among treatments containing B. thuringiensis. Plants treated with control granules or left untreated experienced 10.2% defoliation; plants treated with granules containing B. thuringienis underwent 0.6% defoliation. Granules made with pectin generally resisted wash-off better than granules made with starch or gelatin. When granules were placed in corn whorls previously infested with Spodoptera frugiperda (J.E. Smith) larvae in the greenhouse, granules made with pectin or starch caused 94% insect mortality and the granules made from gelatin caused 72% larval mortality MH - Mexico|Durango MH - Mexico|Nuevo Leon MH - USA PB - DALLAS: SOUTHWESTERN ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0147-1724 UR - ISI:000086821600007 L2 - INACTIVATION; STABILITY SO - Southwestern Entomologist 2000 ;25(1):59-67 1629 UI - 14830 AU - Rams EE AU - Garcia RM AU - Reguera E AU - Sanchez HM AU - Madeira HY AD - Univ Havana, Fac Phys, IMRE, Lab Struct Anal, C Habana 10400, CubaIPN, Sch Math & Phys, Profes Unit Adolfo Lopez Mateos, Mexico City 07738, DF, MexicoRams, EE, Univ Havana, Fac Phys, IMRE, Lab Struct Anal, San Lazaro & L, C Habana 10400, Cuba TI - Structural transformation with milling on sol-gel precursor for BaM hexaferrite AB - The structural modification upon milling in an intermediate step precursor of the sol-gel method for BaFe12O19 hexaferrite BaM production is discussed. The milling of the precursor diminishes the powder particle size, leads to a more homogeneous matrix and induces a solid-state transformation, from gamma -Fe2O3 to alpha -Fe2O3. The induced modifications of the precursors change the magnetic and structural properties of the final BaM hexaferrite compared to the BaM obtained from the non-milled precursor MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000165386800011 L2 - POWDERS SO - Journal of Physics D-Applied Physics 2000 ;33(21):2708-2715 1630 UI - 15264 AU - Rangel-German E AU - Samaniego F AD - UNAM, Ensenada 22800, Baja California, MexicoPemex, Mexico City, DF, MexicoRangel-German, E, Dept Petr Engn, Green Earth Sci Bldg,Room 137, Stanford, CA 94305 USA TI - On the determination of the skin factor and the turbulence term coefficient through a single constant gas pressure test AB - The best correlation for evaluating the turbulence term coefficient, D( mu), for transient flow in gas wells under constant flow rate conditions is currently that of Lee et al. [Lee, R.L., Logan, R.W., Tek, M.R., 1987. Effect of turbulence on transient flow of real gas through porous media. SPE Form. Eval. (March), 108-120]. Several authors have used this correlation to calculate the production decline for wells that produce under constant bottomhole pressure conditions, but it is not clear if this is comet. When exploiting any gas reservoir, the flow rate and the average reservoir pressure decrease with time. This process makes D(mu) increase, whereas D(mu)q(sc) decreases with time; in contrast, when a well is produced under constant flow rate conditions, D(mu)q(sc) increases with time. Due to this fact, it can be of considerable practical interest to analyze the behavior of the high velocity pseudoskin factor, D(mu)q(sc), for gas wells that produce under constant bottomhole pressure conditions. This paper presents the results of a study aimed at obtaining a correlation of both the mechanical skin factor, s, and the turbulence term coefficient, D(mu), for constant bottomhole pressure conditions through the analysis of a single test. Results obtained through a radial real gas flow simulator, carefully validated for pseudosteady state conditions were used as a database for the development of the new correlations. The skin effect considered varies from 0 to 10. Two different gases are considered. Other variables studied are the constant pressure, the reservoir size r(e)/r(w), and formation permeability. The correlation is presented by means of straight-line fits of s(t)/[s(1 - r(w)/r(d))] in the vertical axis and D(mu(i))q(sc) in the horizontal axis. The correlation coefficient was 0.9976. The error obtained when one evaluates the skin factor, s, using the correlation presented in this work is less than 10%. The error is substantially less when production rates are low. These rates strictly correspond to the case of low permeability reservoirs, where the constant pressure boundary condition considered is this study closely apply. (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0920-4105 UR - ISI:000089265700013 L2 - mechanical skin factor;turbulence term coefficient;constant gas pressure;bottomhole pressure SO - Journal of Petroleum Science and Engineering 2000 ;26(1-4):121-131 1631 UI - 15466 AU - Rangel-Rojo R AU - Matsuda H AU - Kasai H AU - Nakanishi H AD - Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Ensenada 22860, Baja California, MexicoNatl Inst Mat & Chem Res, Dept Polymer Chem, Mol Photon Grp, Tsukuba, Ibaraki 305, JapanTohoku Univ, Inst Chem React Sci, Sendai, Miyagi 98077, JapanRangel-Rojo, R, Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Apartado Postal 2732, Ensenada 22860, Baja California, Mexico TI - Irradiance dependence of the resonant nonlinearities in an organic material AB - We present experimental data for the irradiance dependence of the optical nonlinearity of an organic material at different wavelengths across resonance; The material studied was a suspension of vanadyl-phthalocyanine nanocrystals in cyclohexane. The refractive and absorptive contributions to the nonlinearity were resolved by use of the z-scan technique with a tunable picosecond laser source. The observed dependence of the nonlinearity with irradiance is explained by excited-state absorption, and a three-level model is used to describe the nonlinear response. A fit to the experimental data is made, allowing the extraction of molecular parameters that are of interest for a full characterization of the nonlinearity. (C) 2000 Optical Society of America [S0740-3224(00)01808-7] OCIS codes: 190.4710, 160.4330, 070.4340 MH - Japan MH - Mexico|Baja California PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000088752800008 L2 - 3RD-ORDER OPTICAL NONLINEARITIES; CHLOROALUMINUM PHTHALOCYANINE; POLYDIACETYLENE MICROCRYSTALS; Z-SCAN; ABSORPTION; SATURATION; TIME SO - Journal of the Optical Society of America B-Optical Physics 2000 ;17(8):1376-1382 1632 UI - 14612 AU - Rappaport NG AU - Stein JD AU - Mora AAD AU - DeBarr G AU - de Groot P AU - Mori S AD - US Forest Serv, USDA, Pacific SW Res Stn, Berkeley, CA 94701, USAUS Forest Serv, USDA, Forest Hlth Technol Enterprise Team, Morgantown, WV 26505, USAUniv Michoacana, Morelia, Michoacan, MexicoUS Forest Serv, USDA, So Res Stn, Athens, GA 30602, USANat Resources Canada, Canadian Forest Serv, Great Lakes Forestry Ctr, Sault St Marie, ON P6A 5M7, CanadaRappaport, NG, US Forest Serv, USDA, Pacific SW Res Stn, Berkeley, CA 94701 USA TI - Responses of Conophthorus spp. (Coleoptera : Scolytidae) to behavioral chemicals in field trials: A transcontinental perspective AB - We tested six behavioral chemicals, pityol, conophthorin, 4-allylanisole, verbenone, 2-hexenol, and alpha -pinene, in a series of field trials directed at six combinations of Conophthorus Hopkins - Pinus L. spp. (Pinaceae) in sites distributed across North America. Beetle - host tree combinations included Conophthorus ponderosae Hopkins on Pinus ponderosa Laws., C. ponderosae on Pinus monticola Dougl., Conophthorus conicolens Wood on Pinus pseudostrobus Lindl., Conophthorus teocotum Wood on Pinus teocote Schl. & Cham., Conophthorus coniperda (Schwarz) on Pinus strobus L., and Conophthorus resinosae Hopkins on Pinus resinosa Ait. trans-Verbenol was tested only on C. resinosae on P. resinosa. Traps baited with pityol caught more beetles than unbaited traps in nearly all of the assays, and conophthorin consistently inhibited male beetle response to pityol for all species tested. Behavioral responses of species of Conophthorus to alpha -pinene appeared to parallel host phylogeny, inasmuch as beetles using Haploxylon pines as hosts utilized alpha -pinene as a synergist for the beetle-produced pityol, whereas beetles using Diploxylon pines as hosts did not. alpha -Pinene was a synergist for pityol in C. ponderosae on P. monticola and C. coniperda on P. strobus, but not for species of Conophthorus on any other pines tested. Conophthorus ponderosae on P. ponderosa was the only beetle-host combination tested where verbenone was a synergist fur pityol, but tills effect was not consistent in all years of testing. It was also the only beetle-host combination in which 4-allylanisole was a repellent. For all other beetle-host combinations, verbenone was neutral to slightly repellent and 4-allylanisole was either synergistic or neutral in pityol-baited traps. Promising synergists and interruptants/repellents were identified for implementation in pest-management regimes, including conophthorin as an interruptant for all species of Conophthorus tested, 4-allylanisole as an interruptant for C. ponderosae on P. ponderosa, cr-pinene as a synergist for pityol in all species tested on Haploxylon pines, and 4-allylanisole as a synergist for pityol in C. conicolens and C. coniperda MH - USA MH - Canada MH - Mexico|Michoacan PB - OTTAWA: ENTOMOL SOC CANADA RP - NOT IN FILE U3 - TC 14 U4 - Entomology U5 - J;Article AV - English IS - 0008-347X UR - ISI:000166160500019 L2 - PINE-CONE BEETLE; GREEN LEAF VOLATILES; RESINOSAE HOPKINS COLEOPTERA; FACTORS AFFECTING CAPTURE; CONIPERDA SCHWARZ; PHEROMONE TRAPS; AGGREGATION SO - Canadian Entomologist 2000 ;132(6):925-937 1633 UI - 16452 AU - Raptakis D AU - Chavez-Garcia FJ AU - Makra K AU - Pitilakis K AD - Aristotelian Univ Salonika, Dept Civil Engn, GR-54006 Salonika, GreeceUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoRaptakis, D, Aristotelian Univ Salonika, Dept Civil Engn, POB 450, GR-54006 Salonika, Greece TI - Site effects at Euroseistest - I. Determination of the valley structure and confrontation of observations with 1D analysis AB - This paper describes the process of construction of the 2D model of Volvi' s geological structure and results of empirical and theoretical approaches to the evaluation of site response at Euroseistest. The construction of the 2D model is based on a re-interpretation of the available geophysical and geotechnical data in an effort to improve the definition of the subsoil structure at Euroseistest in terms of the most important parameters needed to model site response. The results of this re-interpretation are compared with a previous published 2D model of the same alluvial valley. Different analysis of the measurements and different criteria in the synthesis of data have led to a different model, even if both studies had access to the same field measurements. This underscores the fact that a model results of an interpretation and is not uniquely determined by the data, no matter how detailed they are. The well known subsoil structure opened the possibility to correlate the geometry and the dynamic properties of the 2D model with the results of site response determined from a detailed analysis of two events in frequency and time domains and 1D numerical modeling. The study of site response shows the important effect of the lateral variations on the ground motion and suggests that the contribution of locally generated surface waves to the resonant peak may be important. In the case of Volvi's graben, the limitations of the 1D approximation to simulate ground motion under complex soil conditions in both frequency and time domains are also shown. This paper lays the ground for a companion article dealing with 2D site effects in this basin. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Greece MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 20 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0267-7261 UR - ISI:000085520500001 L2 - Euroseistest;shear wave velocity;surface wave inversion;2D model;observations;numerical modeling;frequency and time domains;site effect physics;locally generated surface waves;EURO-SEISTEST; GREECE; BASIN; WAVES SO - Soil Dynamics and Earthquake Engineering 2000 ;19(1):1-22 1634 UI - 14803 AU - Rasmussen A AU - Yescas P AU - Matsuura T AU - Ashizawa T AU - ALonso M AD - Inst Nacl Neurol & Neurocirugia, Dept Neurogenet, Mexico City, DF, MexicoBaylor Coll Med, Dept Neurol, Houston, TX 77030, USAVet Affairs Med Ctr, Dept Neurol, Houston, TX, USA TI - Molecular diagnosis of spinocerebellar ataxias in a Mexican population MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400701903 SO - American Journal of Human Genetics 2000 ;67(4):342-342 1635 UI - 15828 AU - Raven MC AD - Oregon Hlth Sci Univ, Sch Med, Portland, OR 97201, USAOregon Hlth Sci Univ, Sch Publ Hlth & Prevent Med, Portland, OR 97201, USAUniv Guanajuato, Ctr Studies Bioeth, Guanajuato, Mexico TI - Birth control and family planning in Leon, Mexico: Practices of doctors and patients MH - Mexico|Guanajuato MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Meeting Abstract AV - English IS - 1081-5589 UR - ISI:000086346600499 SO - Journal of Investigative Medicine 2000 ;48(1):91A-91A 1636 UI - 15625 AU - Rayces JL AU - Rosete-Aguilar M AD - JL Ryces Consulting Inc, Tucson, AZ 85718, USAUniv Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoRayces, JL, JL Ryces Consulting Inc, 5890 N Placita Alberca, Tucson, AZ 85718 USA TI - Optical design procedure for duplicating wavefront errors of an optical instrument AB - A new optical design procedure for designing an optical device that will duplicate the wavefront errors of another optical instrument over the full field of view is described in this paper. We call this optical design procedure the inside-out method. It was devised to design an optical instrument that generated wavefronts simulating those of the Hubble Optical Telescope assembly (OTA). As is now common knowledge, during fabrication the OTA primary mirror was made using a defective null-test device; therefore the OTA wavefronts showed perceptible spherical aberration. With the inside-out method it was possible to design an instrument called Red-e Stimulus that matched the OTA aberrated wavefronts to less than 0.0005 lambda (638 nm) peak to valley on axis and 0.006 lambda maximum over the full field of view. The inside-out method is described, and two illustrative examples are given. (C) 2000 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)00707-8] MH - USA MH - Mexico|Distrito Federal PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000088213800005 L2 - Hubble Optical Telescope;wavefront aberrations;aplanatic doublets;duplicating wavefront errors SO - Optical Engineering 2000 ;39(7):1768-1775 1637 UI - 14551 AU - rciniega-Ceballos A AU - Valdes-Gonzalez C AU - Dawson P AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUS Geol Survey, Menlo Park, CA 94025, USAArciniega-Ceballos, A, Univ Nacl Autonoma Mexico, Inst Geofis, Apartado Postal 70-296, Mexico City 04510, DF, Mexico TI - Temporal and spectral characteristics of seismicity observed at Popocatepetl volcano, central Mexico AB - Popocatepetl volcano entered an eruptive phase from December 21, 1994 to March 30, 1995, which was characterized by ash and fumarolic emissions. During this eruptive episode, the observed seismicity consisted of volcano-tectonic (VT) events, long-period (LP) events and sustained tremor. Before the initial eruption on December 21, VT seismicity exhibited no increase in number until a swarm of VT earthquakes was observed at 01:31 hours local time. Visual observations of the eruption occurred at dawn the next morning. LP activity increased from an average of 7 events a day in October 1994 to 22 events per day in December 1994. At the onset of the eruption, LP activity peaked at 49 events per day. LP activity declined until mid-January 1995 when no events were observed. Tremor was first observed about one day after the initial eruption and averaged 10 h per episode. By late February 1995, tremor episodes became more intermittent, lasting less than 5 min, and the number of LP events returned to pre-eruption levels (7 events per day). Using a spectral ratio technique, low-frequency oceanic microseismic noise with a predominant peak around 7 s was removed from the broadband seismic signal of tremor and LP events. Stacks of corrected tremor episodes and LP events show that both tremor and LP events contain similar frequency features with major peaks around 1.4 Hz. Frequency analyses of LP events and tremor suggest a shallow extended source with similar radiation pattern characteristics. The distribution of VT events (between 2.5 and 10 km) also points to a shallow source of the tremor and LP events located in the first 2500 m beneath the crater. Under the assumption that the frequency characteristics of the signals are representative of an oscillator we used a fluid-filled-crack model to infer the length of the resonator. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000166227700002 L2 - popocatepetl volcano;long-period events;tremor;volcano-tectonic earthquakes;Mexico;FLUID-DRIVEN CRACK; LONG-PERIOD EVENTS; REDOUBT-VOLCANO; SOURCE MODEL; TREMOR; ALASKA; EXCITATION; MECHANISM; FREQUENCY; ERUPTION SO - Journal of Volcanology and Geothermal Research 2000 ;102(3-4):207-216 1638 UI - 14857 AU - Readigos AAC AU - Garcia VM AU - Gomezdaza O AU - Campos J AU - Nair MTS AU - Nair PK AD - Univ Autonoma Zacatecas, Fac Chem Sci, Zacatecas, MexicoUniv Nacl Autonoma Mexico, Ctr Invest Energia, Dept Solar Energy Mat, Temixco 62580, Morelos, MexicoUniv Havana, Fac Chem, Dept Inorgan Chem, Havana, CubaReadigos, AAC, Univ Autonoma Zacatecas, Fac Chem Sci, Zacatecas, Mexico TI - Substrate spacing and thin-film yield in chemical bath deposition of semiconductor thin films AB - Thin-film yield in the chemical bath deposition technique is studied as a function of separation between substrates in batch production. Based on a mathematical model, it is proposed and experimentally verified in the case of CdS thin films that the film thickness reaches an asymptotic maximum with increase in substrate separation. It is shown that at a separation less than 1 mm between substrates the yield, i.e. percentage in moles of a soluble cadmium salt deposited as a thin film of CdS, can exceed 50%. This behaviour is explained on the basis of the existence of a critical layer of solution near the substrate, within which the relevant ionic species have a higher probability of interacting with the thin-film layer than of contributing to precipitate formation. The critical layer depends on the solution composition and the temperature of the bath as well as the duration of deposition. An effective value for the critical layer thickness has been defined as half the substrate separation at which 90% of the maximum film thickness for the particular bath composition. bath temperature and duration of deposition is obtained. In the case of CdS thin films studied as an example, the critical layer is found to extend from 0.5 to 2.5 mm from the substrate surface, depending on the deposition conditions MH - Cuba MH - Mexico|Morelos MH - Mexico|Zacatecas PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000165323900003 L2 - SOLUTION GROWTH; N-TYPE; CDS; MECHANISM SO - Semiconductor Science and Technology 2000 ;15(11):1022-1029 1639 UI - 14603 AU - Rebolledo-Vieyra M AU - Urrutia-Fucugauchi J AU - Marin LE AU - Trejo-Garcia A AU - Sharpton VL AU - Soler-Arechalde AM AD - Univ Nacl Autonoma Mexico, Inst Geofis, Lan Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, MexicoUniv Alaska, Inst Geophys, Fairbanks, AK, USARebolledo-Vieyra, M, Univ Nacl Autonoma Mexico, Inst Geofis, Lan Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, Mexico TI - UNAM scientific shallow-drilling program of the Chicxulub impact crater AB - A scientific drilling program is being carried out by the National Autonomous University of Mexico (UNAM) at the southern sector of the Chicxulub impact crater in the Yucatan Peninsula, Mexico. Eight boreholes, ranging in depth from 60 m to 702 m, with a total of 2.62 km of continuos core, were recovered. A high recovery rate of up to 99% (overall average recovery rate for the eight boreholes is 87%) allows us to investigate in detail the stratigraphy of the impact lithologies and the Tertiary carbonate sequence. Three of the boreholes (UNAM-5, UNAM-6, and UNAM-7, with core recovery rates from 89 to 99%) sampled impact breccias that were classified in two units-an upper breccia sequence rich in basement clasts, impact glass, and fragments of melt (suevite-like breccia) and a lower breccia sequence rich in limestone, dolomite, and evaporite clasts (bunte-like breccia). Depths of contact between the Tertiary carbonate sequence and the impact breccias are 332.0 m in UNAM-5, 222.2 m in UNAM-7, and 282.8 m in UNAM-6, giving the depth to the KIT boundary. In UNAM-7, the contact between the upper and the lower breccias is at 348.4 m, which yields a thickness of 126.2 m for the suevite-like breccia. The rest of the boreholes sampled part of the Tertiary carbonate sequence (similar to 200 m thick), composed mainly of limestones, dolomitized carbonates, and calcarenite, with some fossiliferous horizons MH - Mexico|Distrito Federal MH - USA PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 9 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000166142600003 L2 - CRETACEOUS-TERTIARY BOUNDARY; YUCATAN PENINSULA; MELT ROCK; MEXICO; RIES SO - International Geology Review 2000 ;42(10):928-940 1640 UI - 15172 AU - Redhead SA AU - Estrada-Torres A AU - Petersen RH AD - Agr & Agri Food Canada, Res Branch, Eastern Cereal & Oilseed Res Ctr, Systemat Mycol & Bot Sect,CEF, Ottawa, ON K1A 0C6, CanadaUniv Autonoma Tlaxcala, Ctr Invest Ciencias Biol, Tlaxcala 90000, MexicoUniv Tennessee, Dept Bot, Knoxville, TN 37996, USARedhead, SA, Agr & Agri Food Canada, Res Branch, Eastern Cereal & Oilseed Res Ctr, Systemat Mycol & Bot Sect,CEF, Ottawa, ON K1A 0C6, Canada TI - Flammulina mexicana, a new Mexican species AB - A new species, Flammulina mexicana, grows on woody Senecio cinerarioides at high elevation on Mexican volcanoes. A tetrapolar mating system and other cultural features are described. Flammulina mexicana is compared to its closest ally, F. callistosporioides, based on type studies. Both species have hymeniform pileipelli and gelatinized subhymenia MH - Canada MH - Mexico|Tlaxcala MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000089511200020 L2 - Agaricales;Alnus;Argentina;Chile;systematics;R. Singer SO - Mycologia 2000 ;92(5):1009-1018 1641 UI - 15756 AU - Regalado C AU - Garcia-Almendarez BE AU - Venegas-Barrera LM AU - Telluz-Jurado A AU - Rodriguez-Serrano G AU - Huerta-Ochoa S AU - Whitaker JR AD - Univ Autonoma Queretaro, Fac Quim, DIPA PROPAC, Queretaro 76010, Qro, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USARegalado, C, Univ Autonoma Queretaro, Fac Quim, DIPA PROPAC, CU Cerro Campanas S-N, Queretaro 76010, Qro, Mexico TI - Production, partial purification and properties of beta-mannanases obtained by solid substrate fermentation of spent soluble coffee wastes and copra paste using Aspergillus oryzae and Aspergillus niger AB - In order to achieve a higher added value of two galactomannan-containing wastes, copra paste and spent coffee from the soluble coffee industry (SCW), solid substrate fermentation (SSF) was used. Filamentous fungi Aspergillus oryzae and A niger were used to evaluate the feasibility of producing beta-mannanase by SSF. A 2(3) factorial design was used to select the best interaction among the two fungi, the two substrates and two fermentation times. The treatment 'A niger-copra-2.5 days' produced a significantly higher (p < 0.05) beta-mannanase activity, having five different isoforms of the enzyme, one of which was partially purified to a specific activity of 764 U mg(-1) (U = nmol of mannose released per second from a galactomannan substrate). Copra paste had a higher mannose/galactose ratio (14:1) than SCW (6:1), and low oil content, which led to higher beta-mannanase production from SSF, A beta-mannanase from SSF of copra produced by A oryzae was highly purified using acetone precipitation and cation exchange and size exclusion chromatographies. This enzyme had an MW of 110 kDa, a pI between 3.5 and 4.5 and a specific activity of 1760 U mg(-1); purification achieved was 90.7 times. The temperature and pH for optimal activity were 40 degrees C and 6.0 respectively. The optimal temperature was lower and the optimal pH higher than others previously reported (produced by submerged fermentation), which could be important for viscosity reduction of concentrated coffee extract in instant coffee manufacture. Copra is an interesting alternative for beta-mannanase production, since it is readily available in Mexico; moreover, the residue after SSF has a reduced galactomannan content and may be used for monogastric animal feed. (C) 2000 Society of Chemical Industry MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000087896100009 L2 - solid substrate fermentation;Aspergillus niger;Aspergillus oryzae;copra paste utilisation;coffee wastes utilisation;beta-mannanase;TRICHODERMA-REESEI; SCLEROTIUM-ROLFSII; MANNOSIDASE; BINDING; ENZYMES SO - Journal of the Science of Food and Agriculture 2000 ;80(9):1343-1350 1642 UI - 15452 AU - Reich I AU - Diaz P AU - Marin E AD - Univ La Habana, Fac Fis, IMRE, La Habana, CubaIPN, CICATA, Mexico City 07738, DF, MexicoUniv Estadual Norte Fluminense, Ctr Ciencia & Tecnol, Campos Dos Goytacazes, RJ, BrazilReich, I, Univ La Habana, Fac Fis, IMRE, Vedado 10400, La Habana, Cuba TI - Study of nonradiative recombination mechanisms in semiconductors by photoacoustic measurements AB - In this work the application of photoacoustic technique (PA) for the study of recombination mechanisms in semiconductor substrates and heterostructures is briefly reviewed. A theoretical model which allows the investigation of nonradiative recombination time and surface recombination velocity was developed. We present the experimental values of such parameters obtained by fitting the theoretical curves to the experimental PA phase data for SiN:H/Si, AlGaAs/GaAs and InGaAsSb/GaSb single heterostructures MH - Brazil MH - Cuba MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800054 SO - Physica Status Solidi B-Basic Research 2000 ;220(1):305-308 1643 UI - 16109 AU - Reid DL AU - Hernandez-Trujillo J AU - Warkentin J AD - McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaNatl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoWarkentin, J, McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada TI - A theoretical study of hydroxycarbene as a model for the homolysis of oxy- and dioxycarbenes AB - Recent work has shown that dioxycarbenes can readily undergo homolytic fragmentations to radicals in solution. Previous workers have found some theoretical evidence for a transition state in the homolysis of dihydroxycarbene to HOCO and H radicals using the CISD method, but they were not able to conclude whether such a barrier was real or an artifact of the approximation. In this work the homolysis of hydroxycarbene is examined at the CAS and MRCI levels of theory using the cc-pVDZ basis set. The atomic and molecular properties are examined using the theory of atoms in molecules. At the highest level of theory, a transition state is round for the fragmentation of trans- but not of cis-hydroxycarbene. This transition state is rationalized in terms of the electronic states involved in the avoided crossing and by examining the evolution of several atomic and molecular properties during the homolysis. it is concluded that its origin can be traced to a mismatch of the electronic structures of these states in the region of the avoided crossing, best expressed by the dipole moments MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000086655900017 L2 - POTENTIAL-ENERGY SURFACE; TOSYLHYDRAZONE SODIUM-SALTS; PHOTO-DISSOCIATION; FORMALDEHYDE; PYROLYSIS; ATOMS; DIMETHOXYCARBENE; DIALKOXYCARBENES; PHOTOCHEMISTRY; DECOMPOSITION SO - Journal of Physical Chemistry A 2000 ;104(15):3398-3405 1644 UI - 15900 AU - Reigada R AU - Sarmiento A AU - Romero AH AU - Sancho JM AU - Lindenberg K AD - Univ Calif San Diego, Dept Chem & Biochem 0340, La Jolla, CA 92093, USAUniv Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUniv Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, SpainUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoReigada, R, Univ Calif San Diego, Dept Chem & Biochem 0340, La Jolla, CA 92093 USA TI - Harvesting thermal fluctuations: Activation process induced by a nonlinear chain in thermal equilibrium AB - We present a model in which the immediate environment of a bistable system is a molecular chain which in turn is connected to a thermal environment of the Langevin form. The molecular chain consists of masses connected by harmonic or by anharmonic springs. The distribution, intensity, and mobility of thermal fluctuations in these chains is strongly dependent on the nature of the springs and leads to different transition dynamics for the activated process. Thus, all else (temperature, damping, coupling parameters between the chain and the bistable system) being the same, the hard chain may provide an environment described as diffusion-limited and more effective in the activation process, while the soft chain may provide an environment described as energy-limited and less effective. The importance of a detailed understanding of the thermal environment toward the understanding of the activation process itself is thus highlighted. (C) 2000 American Institute of Physics. [S0021-9606(00)00723-6] MH - USA MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000087479100057 L2 - GENERALIZED KRAMERS PROBLEM; ENERGY LOCALIZATION; MEMORY FRICTION; ISOMERIZATION DYNAMICS; HEAT-CONDUCTION; REACTIVE FLUX; LATTICES; OSCILLATORS; PROPAGATION; RELAXATION SO - Journal of Chemical Physics 2000 ;112(23):10615-10624 1645 UI - 15134 AU - Reipurth B AU - Yu KC AU - Heathcote S AU - Bally J AU - Rodriguez LF AD - Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USACerro Tololo Interamer Observ, La Serena, ChileUNAM, Inst Astron, Mexico City 04510, DF, MexicoReipurth, B, Univ Colorado, Ctr Astrophys & Space Astron, Campus Box 391, Boulder, CO 80309 USA TI - Hubble Space Telescope NICMOS images of Herbig-Haro energy sources: [Fe II] jets, binarity, and envelope cavities AB - We have observed seven regions surrounding the driving sources of Herbig-Haro flows using the NICMOS infrared camera on board the Hubble Space Telescope. These Herbig-Haro energy sources, which power the HH 34, 47, 83, 111, 199, 300, and 454 flows, have all been previously detected in the centimeter-wavelength radio continuum. The regions were imaged in two broadband filters, F160W and F205W, which, in addition to stellar continuum, principally transmit the [Fe II] 1.644 mu m and H-2 2.122 mu m lines, respectively, of shocks present in the images. Highly collimated infrared jets emerge from the sources of HH 34, ill, 300, and 454. In all of these cases, the [Fe II] emission transmitted in the F160W filter is much stronger than the H-2 emission in the F205W band. Combined with previously published NICMOS images of the bright [Fe II] HH 1 jet, these data suggest that [Fe II] emission may be as important a tracer of shocked jets in the infrared as [S II] emission is in the optical. [Fe II] emission may be enhanced near the driving sources relative to the H-2 emission by a combination of high jet density and strong far-ultraviolet (7.6-13.6 eV) radiation from the forming star. The HH 454 [Fe II] jet, which emanates from the L1551 NE source, is pointed directly at the bright shock HH 29, providing further evidence that this young star, rather than L1551 IRS 5, is the source of the brightest Herbig-Haro object in the L1551 outflow complex. In five regions, the driving sources are visible at 2 mu m. Among these, the sources powering HH 47 and HH 300 are found to be binary stars. One other young stellar system, the source of the HH 111 protostellar jet, is triple. When combined with other studies, these results indicate that 36% of 14 Herbig-Haro energy sources observed with NICMOS are multiple at near-infrared wavelengths with component separations greater than 0 ".15-0 ".20. Therefore, considering incompleteness, obscuration, and faintness of possible companions in the observed bands, the binary frequency is likely to be considerably higher among the selected systems than among low-mass main-sequence dwarf stars. There is no obvious connection between source multiplicity and jet morphology observed on large scales. For example, the beam of the HH 47 jet exhibits quasi-periodic wiggles that might be one indication of jet modulation at the binary orbital period. However, the total mass of the observed central binary would have to be unrealistically large to make the orbital period comparable to the ejection time interval of these jet features. Finally, the properties of the near-infrared reflection nebulae associated with the observed sources are investigated. The shapes of the cavity walls traced by the observed reflection nebulae indicate the presence of large-scale and highly flattened circumstellar structures that are opaque at near-infrared wavelengths. Their flaring shapes either are the result of preferential infall of the protostellar envelope along the outflow axis or were carved by wide-angle winds emerging from the inner disk and the forming star. The inclination angles of several circumstellar structures are estimated MH - Chile MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 58 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-6256 UR - ISI:000089670300022 L2 - ISM : jets and outflows;stars : formation;stars : mass loss;AURIGA MOLECULAR CLOUD; EMBEDDED YOUNG STARS; NEAR-INFRARED OBSERVATIONS; MAIN-SEQUENCE STARS; EXCITING SOURCES; PROTOSTELLAR COLLAPSE; SUPERNOVA-REMNANTS; ACCRETION DISKS; STELLAR OBJECTS; VLA DETECTION SO - Astronomical Journal 2000 ;120(3):1449-1466 1646 UI - 15972 AU - Reipurth B AU - Heathcote S AU - Yu KC AU - Bally J AU - Rodriguez LF AD - Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USACerro Tololo Interamer Observ, La Serena, ChileUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoReipurth, B, Univ Colorado, Ctr Astrophys & Space Astron, Campus Box 391, Boulder, CO 80309 USA TI - Hubble Space Telescope NICMOS and WFPC2 images of the HH 1 jet: A comparative study AB - We present new Hubble Space Telescope (HST) NICMOS images of the source region of the HH 1/2 flow. The HH 1 jet is traced in the [Fe II] 1.64 mu m and the H-2 2.12 mu m lines to about 2 " 5 of the deeply embedded VLA source. In general, the structure of the jet is similar in H-2 and [Fe II] with all the features having comparable brightness in both species. However, there is a gradient in the H-2/[Fe II] ratio which increases with distance from the source. We also compare our infrared images with almost contemporary HST WFPC2 images in H alpha and [S II]. The ratio of [Fe II] to [S II], both low-excitation tracers of weak shocks, is almost constant along the visible part of the jet but then increases by an order of magnitude where the optical jet disappears. If this is due to reddening, then the extinction, A(V), increases by at least 4 mag in a space of 0." 9 corresponding to 420 AU. Beyond this obscuring ridge, we detect five more infrared knots. Less than 2 " now separate the infrared jet and the tip of the compact 3.6 cm radio continuum jet centered on the VLA source. The heavy extinction which obscures the base of the IR jet is probably due to the compact cloud core recently detected in HCO+. The jet is observed to steadily increase in width, and we argue that this is either due to sideways ejection of shocked material from internal working surfaces or a sonic expansion of the hot jet beam. Surprisingly, the width of the jet is the same to within measurement errors in H-2 and [Fe II], contrary to the expectations of some models. Two small, previously detected off-axis knots appear to form an independent HH flow, which we call HH 501. An infrared cometary nebula (dubbed the X nebula) is found next to the HH 1 jet, along a line through the HH 501 knots, possibly supporting earlier speculations that yet one more source exists in the region. However, new proper motions of the HH 501 flow suggest an origin of these knots near VLA 1, and it is therefore possible that the VLA 1 source itself may be a close binary, thus forming a triple system with the more distant VLA 2 MH - Chile MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087183300030 L2 - infrared : ISM : lines and bands;ISM : jets and outflows;stars : formation;stars : mass loss;HERBIG-HARO OBJECT-1; MOLECULAR-HYDROGEN; PROPER MOTIONS; HH-1-2 SYSTEM; STELLAR JETS; REGION; EXCITATION; RESOLUTION; SPECTROSCOPY; COMPLEX SO - Astrophysical Journal 2000 ;534(1):317-323 1647 UI - 15937 AU - Ren J AU - Song SX AU - Lopez-Valdivieso A AU - Lu SC AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoNanjing Univ, Ctr Res Surfaces & Interfaces, Nanjing 210093, Peoples R ChinaUniv Sci & Technol Beijing, Resources Engn Sch, Beijing 100083, Peoples R ChinaSong, SX, Univ Autonoma San Luis Potosi, Inst Met, Sierra Leona 550,Lomas 2a Secc, San Luis Potosi 78210, Mexico TI - Selective flotation of bastnaesite from monazite in rare earth concentrates using potassium alum as depressant AB - Electrokinetic and flotation studies were carried out on single particles of bastnaesite and monazite to develop a flotation scheme for selectively removing monazite in the rare earth bulk concentrate from the Baiyunebo mine, in China (60.7% rare earth oxides or REO, 75% as bastnaesite and 25% as monazite). Low additions of potassium alum were found to efficiently depress monazite at pH 5 without affecting the flotability of bastnaesite with the collector benzoic acid. The bulk concentrate was treated through this scheme, and 85% of the bastnaesite was recovered in a concentrate that assayed 69.5% REO and contained 97% bastnaesite. The depressing effect of potassium alum appeared to be due to the preferential adsorption of hydrolyzed aluminum species on monazite in comparison to bastnaesite. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0301-7516 UR - ISI:000087391700004 L2 - bastnaesite flotation;monazite flotation;rare earth mineral separation;alum as depressant;hydrolyzed aluminum ions SO - International Journal of Mineral Processing 2000 ;59(3):237-245 1648 UI - 15410 AU - renas-Huertero F AU - Arroyo A AU - Zhou L AU - Sheen J AU - Leon P AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoHarvard Univ, Sch Med, Dept Genet, Boston, MA 02114, USAMassachusetts Gen Hosp, Dept Mol Biol, Boston, MA 02114, USALeon, P, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, Mexico TI - Analysis of Arabidopsis glucose insensitive mutants, gin5 and gin6, reveals a central role of the plant hormone ABA in the regulation of plant vegetative development by sugar AB - Sugars have signaling roles in a wide variety of developmental processes in plants. To elucidate the regulatory components that constitute the glucose signaling network governing plant growth and development, we have isolated and characterized two Arabidopsis glucose insensitive mutants, gin5 and gin6, based on a glucose-induced developmental arrest during early seedling morphogenesis. The T-DNA-tagged gin6 mutant abrogates the glucose-induced expression of a putative transcription factor, ABI4, previously shown to be involved in seed-specific abscisic acid (ABA) responses. Thus, ABI4 might be a regulator involved in both glucose- and seed-specific ABA signaling. The characterization of the gin5 mutant, on the other hand, reveals that glucose-specific accumulation of ABA is essential for hexokinase-mediated glucose responses. Consistent with this result, we show that three ABA-deficient mutants (aba1-1, aba2-1, and aba3-2) are also glucose insensitive. Exogenous ABA can restore normal glucose responses in gin5 and aba mutants but not in gin6 plants. Surprisingly, only abi4 and abi5-1 but not other ABA-insensitive signaling mutants (abi1-1, abi2-1, and abi3-1) exhibit glucose insensitivity, indicating the involvement of a distinct ABA signaling pathway in glucose responses. These results provide the first direct evidence to support a novel and central role of ABA in plant glucose responses mediated through glucose regulation of both ABA levels by GIN5 and ABA signaling by GIN6/ABI4 MH - Mexico|Morelos MH - USA PB - PLAINVIEW: COLD SPRING HARBOR LAB PRESS RP - NOT IN FILE U3 - TC 121 U4 - Cell Biology;Developmental Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0890-9369 UR - ISI:000088871600010 L2 - glucose insensitive;Arabidopsis thaliana;glucose regulation;ABA;abi;hexokinase;SIGNAL-TRANSDUCTION PATHWAYS; ABSCISIC-ACID; GENE-EXPRESSION; PROTEIN-PHOSPHORYLATION; BETA-AMYLASE; WD PROTEIN; THALIANA; SUCROSE; HEXOKINASE; STRESS SO - Genes & Development 2000 ;14(16):2085-2096 1649 UI - 16302 AU - Renugopalakrishnan V AU - Madrid G AU - Cuevas G AU - Hagler AT AD - Harvard Univ, Sch Med, Childrens Hosp, Boston, MA 02115, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoBiosym MSI Inc, San Diego, CA 92121, USARenugopalakrishnan, V, Harvard Univ, Sch Med, Childrens Hosp, 300 Longwood Ave, Boston, MA 02115 USA TI - Density functional studies of molecular structures of N-methyl formamide, N,N-dimethyl formamide, and N,N-dimethyl acetamide AB - Density functional theory was applied to the calculation of molecular structures of N-methyl formamide (NMF), N,N-dimethyl formamide (DMF), and N,N-dimethyl acetamide (DMA). DFT calculations on NMF, DMF, and DMA were performed using a combination of the local functional of Vosko, Wilk, and Nusair (VWN) with the nonlocal exchange functional of Becke and the nonlocal correlational functional of Lee, Yang, and Parr (BLYP). The adiabatic connection method (ACM) of Becke has also been used, for the first time, for the calculation of molecular structures of NMF, DMF, and DMA. The calculated molecular structures are in excellent agreement with the experimental geometries of NMF and DMA derived from gas-phase electron-diffraction studies. Sparse experimental data on the gas-phase geometry of DMF reported in the literature compares well with the DFT results on DMF. DFT emerges as a powerful method to calculate molecular structures MH - USA MH - Mexico|Distrito Federal PB - BANGALORE: INDIAN ACADEMY SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0253-4134 UR - ISI:000085981600004 L2 - density functional theory;alkyl amides;molecular structure of alkyl amides;transition state search;peptide models;CONFORMATIONS; ENERGIES SO - Proceedings of the Indian Academy of Sciences-Chemical Sciences 2000 ;112(1):35-42 1650 UI - 16249 AU - Restrepo CM AU - Pineda L AU - Rojas-Martinez A AU - Gutierrez CA AU - Morales A AU - Gomez Y AU - Villalobos MC AU - Borjas L AU - Delgado W AU - Myers A AU - Barrera-Saldana HA AD - Univ Autonoma Nuevo Leon, Fac Med, Col Mitras Ctr, Dept Bioquim, Monterrey 64460, Nuevo Leon, MexicoUniv Colegio Mayor Nuestra Senora del Rosario, Fac Med, Inst Ciencias Basicas, Unidad Genet, Bogota, ColombiaUniv Zulia, Fac Med, Unidad Genet Med, Maracaibo 4011, Zulia, VenezuelaBarrera-Saldana, HA, Univ Autonoma Nuevo Leon, Fac Med, Col Mitras Ctr, Dept Bioquim, Av Francisco I Madero & Calle Dr Eduardo Aguirre, Monterrey 64460, Nuevo Leon, Mexico TI - CFTR mutations in three Latin American countries AB - We analyzed 192 cystic fibrosis (CF) alleles in three Latin American countries: Mexico, Colombia, and Venezuela, Mutation screening was performed by polymerase chain reaction (PCR) and a reverse dot blot detection kit that enables determination of 16 of the most common CF mutations worldwide. Mutations were detected in 47.9% of the screened CF alleles, The most prevalent CF allele was Delta F508 (39.8%). The remaining 16 non-Delta F508 detectable mutations represented 8.3% of the CF alleles, Among them, the G542X, N1303K, and 3849+10kb C>T were the most common. Although the frequency of Delta F508 described here is lower than that reported for Caucasian populations, including in Spain, it is remarkable that mutation prevalences found in this study resemble those observed in Spain. Two of these mutations, G542X and 3849+10kb C>T, that were relevant in this analysis, have a particularly high incidence in Spanish communities. The low frequency of Delta F508 described here may be explained by the Amerindian, Caucasian, and Black admixture that occurred in Latin America after the discovery of the New World, and also by the probable occurrence of mutations contributed by the original natives, which were undetectable in this analysis. (C) 2000 Wiley-Liss, Inc MH - Colombia MH - Mexico|Nuevo Leon MH - Venezuela PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000086304800007 L2 - cystic fibrosis;allele/mutation frequencies;ethnic groups;Latin America;CYSTIC-FIBROSIS PATIENTS; DELTA-F508; FREQUENCY; FAMILIES SO - American Journal of Medical Genetics 2000 ;91(4):277-279 1651 UI - 15832 AU - Reyes-Betanzo C AU - Herrera-Perez JL AU - Cocoletzi GH AU - Zelaya-Angel O AD - Univ Autonoma Puebla, Escuela Ciencias elect, Puebla 72570, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoInst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Puebla 72160, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 14, DF, MexicoReyes-Betanzo, C, Univ Autonoma Puebla, Escuela Ciencias elect, Ciudad Univ, Puebla 72570, Mexico TI - Refractive index of colored films of molybdenum trioxide AB - We apply a film thickness-independent technique to measure the index of refraction n=n+ik for amorphous thin films of molybdenum trioxide. The films were grown by thermal evaporation and then colored by light irradiation for different exposure times. Data for the reflectivity and differential reflectivity yield n and show no dependence on the density of color centers. We find that small variations of the absorption coefficient induce changes in the differential reflectance line shape at angles different from the Brewster angle. (C) 2000 American Institute of Physics. [S0021-8979(00)01413- 4] MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000087704000033 L2 - THIN-FILMS; OPTICAL-PROPERTIES; MOO3; ABSORPTION SO - Journal of Applied Physics 2000 ;88(1):223-226 1652 UI - 16554 AU - Reyes-Cruz G AU - Vazquez-Prado J AU - Muller-Esterl W AU - Vaca L AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Mainz, Inst Physiol Chem & Pathobiochem, D-55099 Mainz, GermanyReyes-Cruz, G, NIDDK, Metab Dis Branch, NIH, 9000 Rockville Pike,Bldg 10,Room 8C101, Bethesda, MD 20892 USA TI - Regulation of the human bradykinin B2 receptor expressed in sf21 insect cells: A possible role for tyrosine kinases AB - The functional regulation of the human bradykinin B2 receptor expressed in sf21 cells was studied. Human bradykinin B2 receptors were immunodetected as a band of 75-80 kDa in membranes from recombinant baculovirus-infected cells and visualized at the plasma membrane, by confocal microscopy, using an antibody against an epitope from its second extracellular loop. B2 receptors, detected in membranes by [H-3-bradykinin] binding, showed a Kd of 0.66 nmol/L and an expression level of 2.57 pmol/mg of protein at 54 h postinfection. In these cells, bradykinin induced a transient increase of intracellular calcium ([Ca2+](i)) in fura 2-AM loaded sf21 cells, and promoted [S-35]-GTP(gamma)S binding to membranes. The effects of bradykinin were dose dependent (with an EC50 of 50 nmol/L for calcium mobilization) and were inhibited by N-alpha-adamantaneacetyl-D-Arg-[Hyp(3),Thi(5,8),D-phe(7)]-Bk, a specific B2 receptor antagonist. When the B2 antagonist was applied at the top of the calcium transient, it accelerated the decline of the peak, suggesting that calcium mobilization at this point was still influenced by receptor occupation. No calcium mobilization was elicited by 1 mu mol/L (Des-Arg(9))-Bk a B1 receptor agonist that did not inhibit the subsequent action of 100 nmol/L bradykinin. No effect of bradykinin was detected in uninfected cells or cells infected with the wild-type baculovirus. Bradykinin-induced [Ca2+](i) mobilization was increased by genistein and tyrphostin A51. These tyrosine kinase inhibitors did not modify basal levels of [Ca2+](i). Homologous desensitization of the B2 receptor was observed after repeated applications of bradykinin, which resulted in attenuated changes in intracellular calcium. In addition, genistein promoted an increased response to a third exposure to the agonist when applied after washing the cells that had been previously challenged with two increasing doses of bradykinin. Genistein did not affect the calcium mobilization induced by activation of the endogenous octopamine G protein-coupled receptor or by thapsigargin. The B2 receptor, detected by confocal microscopy in unpermeabilized cells, remained constant at the surface of cells stimulated with bradykinin for 10 min, in the presence or absence of genistein. Agonist-promoted phosphorylation of the B2 receptor was markedly accentuated by genistein treatment. Phosphoaminoacid analysis revealed the presence of phosphoserine and traces of phosphothreonine, but not phosphotyrosine, suggesting that the putative tyrosine kinase(s), activated by bradykinin, could act in a step previous to receptor phosphorylation. Interestingly, genistein prevented agonist-induced G protein uncoupling from B2 receptors, determined by in vitro bradykinin-stimulated [S-35]-GTP(gamma)S binding, in membranes from bradykinin pretreated cells. Our results suggest that tyrosine kinase(s) regulate the activity of the human B2 receptor in sf21 cells by affecting its coupling to G proteins and its phosphorylation. (C) 2000 Wiley-Liss, inc MH - Germany MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 0730-2312 UR - ISI:000085101600014 L2 - human bradykinin receptor;receptor desensitization;intracellular calcium;Sf21 cells;PROTEIN-COUPLED RECEPTORS; SUBSTANCE-P RECEPTOR; SF9 CELLS; SIGNAL-TRANSDUCTION; MUSCARINIC RECEPTOR; INDUCED PHOSPHORYLATION; FUNCTIONAL EXPRESSION; MUSCLE-CELLS; C-DELTA; DESENSITIZATION SO - Journal of Cellular Biochemistry 2000 ;76(4):658-673 1653 UI - 14549 AU - Reyes-Gasga J AU - Pita-Larranaga A AU - Mondragon-Galicia G AU - Valles-Gonzalez MP AU - Sanchez-Pascual A AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Nacl Invest Nucl, Mexico City 06100, DF, MexicoINTA, Madrid 28850, SpainReyes-Gasga, J, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Presence of oxygen in the structure of quasicrystalline phases in in-situ heated thin films of the Al-Co-Cr-Fe-O and Al-Mn-Si-O systems AB - Quasicrystalline and crystalline phase transitions from amorphous thin films of the Al-Co-Cr-Fe-O and Al-Mn-Si-O systems have been studied in the case of in-situ heating treatment in the transmission electron microscope. Heating the films up to 800 degreesC, grains with quasicrystalline decagonal phase as structure were developed in both systems. The structural and chemical analysis indicates that, in both cases, the decagonal phase is an oxygen-containing quasicrystalline phase. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000166175900197 L2 - quasicrystals;thin films;in-situ heating;TEM;EDS;EELS;TRANSMISSION ELECTRON-MICROSCOPY; QUASI-CRYSTALLINE PHASES SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2000 ;294():850-853 1654 UI - 15671 AU - Reyes-Reyes J AU - Yu W AU - Poznyak AS AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoPoznyak, AS, Univ Kansas, Dept Math, 405 Snow Hall, Lawrence, KS 66045 USA TI - Passivation and control of partially known SISO nonlinear systems via dynamic neural networks AB - In this paper, an adaptive technique is suggested to provide the passivity property for a class of partially known SISO nonlinear systems. A simple Dynamic Neural Network (DNN), containing only two neurons and without any hidden-layers, is used to identify the unknown nonlinear system. By means of a Lyapunov-like analysis the new learning law for this DNN, guarantying both successful identification and passivation effects, is derived. Based on this adaptive DNN model, an adaptive feedback controller, serving for wide class of nonlinear systems with an a priori incomplete model description, is designed. Two typical examples illustrate the effectiveness of the suggested approach MH - Mexico|Distrito Federal MH - USA PB - READING: GORDON BREACH SCI PUBL LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 1024-123X UR - ISI:000088035300004 L2 - passivity;dynamic neural networks;adaptive stabilization;ADAPTIVE-CONTROL; STABILIZATION; PASSIVITY; STABILITY SO - Mathematical Problems in Engineering 2000 ;6(1):61-83 1655 UI - 16648 AU - Reyes-Salazar A AU - Haldar A AD - Univ Autonoma Sinaloa, Fac Ingn, Culiacan, Sinaloa, MexicoUniv Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721, USAReyes-Salazar, A, Univ Autonoma Sinaloa, Fac Ingn, Culiacan, Sinaloa, Mexico TI - Dissipation of energy in steel frames with PR connections AB - The major sources of energy dissipation in steel frames with partially restrained (PR) connections are evaluated. Available experimental results are used to verify the mathematical model used in this study. The verified model is then used to quantify the energy dissipation in PR connections due to hysteretic behavior, due to viscous damping and at plastic hinges if they are formed. Observations are made for two load conditions: a sinusoidal load applied at the top of the frame, and a sinusoidal ground acceleration applied at the base of the frame representing a seismic loading condition. This analytical study confirms the general behavior, observed during experimental investigations, that PR connections reduce the overall stiffness of frames, but add a major source of energy dissipation. As the connections become stiffer, the contribution of PR connections in dissipating energy becomes less significant. A connection with a T ratio (representing its stiffness) of at least 0.9 should not be considered as fully restrained as is commonly assumed, since the energy dissipation characteristics are different. The flexibility of PR connections alters the fundamental frequency of the frame. Depending on the situation, it may bring the frame closer to or further from the resonance condition. if the frame approaches the resonance condition, the effect of damping is expected to be very important. However, if the frame moves away from the resonance condition, the energy dissipation at the PR connections is expected to be significant with an increase in the deformation of the frame, particularly for low damping values. For low damping values, the dissipation of energy at plastic hinges is comparable to that due to viscous damping, and increases as the frame approaches failure. For the range of parameters considered in this study, the energy dissipations at the PR connections and at the plastic hinges are of the same order of magnitude. The study quantitatively confirms the general observations made in experimental investigations for steel frames with PR connections; however, proper consideration of the stiffness of PR connections and other dynamic properties is essential in predicting the dynamic behavior MH - Mexico|Sinaloa MH - USA PB - TAEJON: TECHNO-PRESS RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Civil;Engineering, Mechanical U5 - J;Article AV - English IS - 1225-4568 UR - ISI:000084716300003 L2 - energy dissipation;partially restrained connections;sinusoidal loading;viscous damping;hysteretic damping;inelastic analysis;MDOF elasto-plastic system;time history analysis;moment resisting steel frames;connection stiffness;SEISMIC-ENERGY; BEHAVIOR SO - Structural Engineering and Mechanics 2000 ;9(3):241-256 1656 UI - 16237 AU - Reynolds MP AU - Delgado MI AU - Gutierrez-Rodriguez M AU - Larque-Saavedra A AD - CIMMYT, Houston, TX 77205, USAColegio Postgraduados, Mexico City 56230, DF, MexicoReynolds, MP, CIMMYT, Apartado 370,POB 60326, Houston, TX 77205, USA TI - Photosynthesis of wheat in a warm, irrigated environment - I: Genetic diversity and crop productivity AB - Net photosynthetic rate (A(n)), stomatal conductance (g(s)), chlorophyll content and dark respiration rate were measured on 16 wheat cultivars (Triticum aestivum L.), grown in replicated yield trials in a warm, irrigated, and low relative humidity environment in central Mexico. Measurements were made on flag leaves in full sunlight at three different stages of plant development (booting, anthesis, and grain filling), and at different times of the day. Two experiments were conducted with sowing dates in December 1991 and March 1992, whose average daily temperature for their respective growing cycles were 21 and 25 degrees C. Physiological measurements were compared with agronomic performance on the same field plots. A(n) was fairly stable during the day between 10:00 and 14:00 h, and across experiments, despite differences in leaf temperature of up to 4 degrees C. A(n) fell noticeably at successively later stages of plant development, however, and there were clear differences among cultivars. With both sowing dates, A(n) and g(s) measured at all three stages of development correlated significantly with yield and biomass of the cultivars. A(n) during the grain filling period was also strongly associated with chlorophyll loss. The data indicate that differences in A(n) throughout the crop cycle as well as variation in the onset of senescence may be important variables affecting wheat yield potential in warm environments. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000086266800004 L2 - genetic variability;heat tolerance;photosynthesis;physiological selection traits;wheat;yield potential;CANOPY-APPARENT PHOTOSYNTHESIS; HIGH-TEMPERATURE STRESS; STOMATAL CONDUCTANCE; CULTIVAR DIFFERENCES; LEAF PHOTOSYNTHESIS; GAS-EXCHANGE; SEED YIELD; TRAITS; IMPROVEMENT; PROGRESS SO - Field Crops Research 2000 ;66(1):37-50 1657 UI - 16075 AU - Reynolds WF AU - Enriquez RG AU - Magos GA AU - Gnecco D AD - Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, CanadaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Sch Med, Dept Pharmacol, Mexico City 04510, DF, MexicoBUAP, Ctr Quim, Inst Ciencias, Puebla 72000, MexicoReynolds, WF, Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada TI - Total assignment of the H-1 and C-13 NMR spectra of casimiroedine and its peracetylated derivative AB - The rare alkaloid casimiroedine and its peracetylated derivative both show complex H-1 and C-13 spectra with almost all signals doubled owing to slow rotation about the amide bond. Nevertheless, it is possible, using 2D NMR methods, to assign fully the H-1 and C-13 spectra of the major and minor conformational isomers for each compound. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000086842500007 L2 - NMR;H-1 NMR;C-13 NMR;casimiroedine;alkaloid;slow isomerization;structure SO - Magnetic Resonance in Chemistry 2000 ;38(5):366-369 1658 UI - 15035 AU - Reynoso VH AU - Callison G AD - McGill Univ, Redpath Museum, Montreal, PQ H3A 2K6, CanadaReynoso, VH, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Apdo Postal 70-153, Mexico City 04510, DF, Mexico TI - A new scincomorph lizard from the Early Cretaceous of Puebla, Mexico AB - A complete skeleton of a new scincomorph lizard from the Early Cretaceous deposits of Tepexi de Rodriguez is described. Tepexisaurus tepexii gen. et sp, nov. is the best preserved early scincomorph and the first known taxon that is morphologically primitive to scincoids and paramacellodid lizards. The presence of pointed ventral parietal downgrowths, the coronoid overlapped anteriorly and posteriorly by the dentary and surangular, a small medial flange on the retroarticular process, and weak zygosphene and zygantrum articulations suggest scincoid relationships, but the absence of ventral and dorsal osteoscutes place Tepexisaurus as sister-group of this taxon. It shares die presence of +/- 30 closely packed teeth with the poorly known Upper Jurassic genus Saurillus and Pseudosaurillus, but differences in the coronoid structure, Meckelian groove and jaw proportions indicate that both taxa are distinct. Similar to Tepexisaurus, the absence of osteoscutes in Saurillus, Pseudosaurillus and Saurillodon place these taxa in a more primitive position relative to other paramacellodids which should be included within Scincoidea. Thus, Paramacellodidae as previously defined is a paraphyletic assemblage. The late presence of a pre-scincoid lizard in the Albian deposits of Tlayua can be correlated with the presence of sphenodontians and the relictual nature of the basal squamate Huehuecuetzpalli mixtecus. It gives additional evidence to support the hypothesis that Tlayua was a refuge for terrestrial archaic forms during the Albian. (C) 2000 The Linnean Society of London MH - Canada MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 10 U4 - Zoology U5 - J;Article AV - English IS - 0024-4082 UR - ISI:000089962400001 L2 - Squamata;Scincomorpha;Scincoidea;Paramacellodidae;Early cretaceous;Albian;Mexico;taxonomy;cladistics;biogeography SO - Zoological Journal of the Linnean Society 2000 ;130(2):183-212 1659 UI - 15146 AU - rguelles-Monal WM AU - Goycoolea FM AU - Peniche C AU - Lizardi J AU - Higuera-Ciapara I AD - Univ La Habana, IMRE, Havana 10400, CubaCIAD, Lab Biopolymers, Hermosillo 83000, Sonora, MexicoUniv Havana, Ctr Biomat, Havana, Cuba TI - Phase separation and gelation processes in alkali chitin MH - Cuba MH - Mexico|Sonora PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246202261 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U402-U402 1660 UI - 15380 AU - Richaud-Patin Y AU - Cabiedes J AU - Jakez-Ocampo J AU - Vidaller A AU - Llorente L AD - Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoHosp Principes Espana, Dept Internal Med, Barcelona, SpainLlorente, L, Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - High prevalence of protein-dependent and protein-independent antiphospholipid and other autoantibodies in healthy elders MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0049-3848 UR - ISI:000088915200003 L2 - antiphospholipid antibodies;aging;autoimmunity;SYSTEMIC LUPUS-ERYTHEMATOSUS; ANTICARDIOLIPIN ANTIBODIES; RHEUMATOID-ARTHRITIS; COFACTOR; BETA(2)-GLYCOPROTEIN-I; INTERLEUKIN-10; CARDIOLIPIN; VARIANT; ASSAYS; PEOPLE SO - Thrombosis Research 2000 ;99(2):129-133 1661 UI - 14563 AU - Ricker M AU - Siebe C AU - Sanchez S AU - Shimada K AU - Larson BC AU - Martinez-Ramos M AU - Montagnini F AD - Univ Nacl Autonoma Mexico, Jardin Bot Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Edafol, Inst Geol, Mexico City 04510, DF, MexicoYale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511, USAUniv Nacl Autonoma Mexico, Dept Ecol Recursos Nat, Inst Ecol, Morelia 58089, Michoacan, MexicoTrop Agr Res & Training Ctr CATIE, Management & Silviculture Trop Forests, Turrialba 7170, Costa RicaRicker, M, Univ Nacl Autonoma Mexico, Jardin Bot Inst Biol, Apartado Postal 70-614, Mexico City 04510, DF, Mexico TI - Optimising seedling management: Pouteria sapota, Diospyros digyna, and Cedrela odorata in a Mexican rainforest AB - Seedlings of three commercial native tree species were planted under heterogeneous light and nutrient conditions in primary rainforest, secondary forest, and open pasture in Los Tuxtlas (Veracruz, Mexico). Management consisted of weeding around seedlings, and watering during the dry period. The objective was to find those natural growth conditions that maximize height growth in the first 2 years after transplantation from a nursery. Using stepwise multiple linear regression, the combined effect of varying canopy openness, leaf nutrients, initial seedling height, and seed mass on the plant height at the end of the study were analysed. The effect of the light environment differed clearly between species: the fruit species Pouteria sapota (Jacquin) H.E. Moore & Steam (Mamey) and Diospyros digyna Jacquin (Black Sapote) revealed an optimal canopy openness of 60 and 55%, respectively, while the timber species Cedrela odorata Linnaeus (Spanish Cedar) grew best under maximum openness. Consequently, P. sapota and D. digyna are recommendable for an enrichment or shelterwood system in the forest, while C. odorata is recommendable as a reforestation species in the open. For P. sapota and D. digyna, plant height variation at the end of the study was also explained by the leaf zinc concentration, initial plant height, and in P. sapota by the seed mass and leaf calcium/magnesium ratio (for C. odorata, seed mass and nutrients had not been measured). The regression model indicated that considerable height increases are possible by optimizing these growth parameters within the encountered ranges. For P. sapota, average height growth after 24 months in the field could be increased 2.5-fold, from 111 cm with average values to 280 cm with optimal values. For D, digyna, average height growth after 17 months could be increased 1.8-fold, from 78 to 138 cm. For C. odorata, the possible increase after 16 months was 2.7-fold, from 55 to 147 cm. (C) 2000 Elsevier Science B.V. All rights reserved MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000166242100005 L2 - Cedrela odorata;Diospyros digyna;leaf nutrients;light environment;Pouteria sapota;rainforest management;seedling growth;TUXTLAS-BIOLOGICAL-STATION; TROPICAL RAIN-FOREST; LOS-TUXTLAS; VERACRUZ; GROWTH; PHOSPHORUS; CHECKLIST; PLANTS; ZINC; PHOTOGRAPHS SO - Forest Ecology and Management 2000 ;139(1-3):63-77 1662 UI - 14894 AU - Rico-Martinez R AU - Adomaitis RA AU - Kevrekidis IG AD - Princeton Univ, Sch Engn & Appl Sci, Dept Chem Engn, Princeton, NJ 08544, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoUniv Maryland, Dept Chem Engn, College Pk, MD 20742, USAKevrekidis, IG, Princeton Univ, Sch Engn & Appl Sci, Dept Chem Engn, Olden St, Princeton, NJ 08544 USA TI - Noninvertibility in neural networks AB - We present and discuss an inherent shortcoming of neural networks used as discrete-time models in system identification, time series processing, and prediction. Trajectories of nonlinear ordinary differential equations (ODEs) can, under reasonable assumptions, be integrated uniquely backward in time; Discrete-time neural network mappings derived from time series, on the other hand, can give rise to multiple trajectories when followed backward in time: they are in principle noninvertible. This fundamental difference can lead to model predictions that are not only slightly quantitatively different, but qualitatively inconsistent with continuous time series. We discuss how noninvertibility arises, present key analytical concepts and some of its phenomenology. Using two illustrative examples (one experimental and one computational), we demonstrate when noninvertibility becomes an important factor in the validity of artificial neural network (ANN) predictions, and show some of the overall complexity of the predicted pathological dynamical behavior. These concepts can be used to probe the validity of ANN time series models, as well as provide guidelines for the acquisition of additional training data. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000165247800005 L2 - noninvertibility;artificial neural networks;time-series processing;system identification;TIME-SERIES; SYSTEM-IDENTIFICATION; DISCRETE-TIME; MODELS; CHAOS; MAPS SO - Computers & Chemical Engineering 2000 ;24(11):2417-2433 1663 UI - 15736 AU - Rico J AU - Heydt GT AD - Arizona State Univ, Tempe, AZ 85287, USAUniv Michoacan, Morelia, Michoacan, MexicoRico, J, Arizona State Univ, Tempe, AZ 85287, USA TI - Parameter estimation using an orthogonal series expansion AB - This paper presents an innovative alternative to estimate parameters of a system for which a dynamic model is known. The focus Of this paper is the estimation, of the armature circuit parameters of large utility generators using real time operating data. Other applications are possible. The alternatives considered are the use of orthogonal series expansions, in general, and the Hartley series, in particular. The main idea considers the use of orthogonal series expansions for fitting operating data (e.g., voltage and currents measurements). This allows writing a set of linear algebraic equations that can be "solved" in the least squares sense for the unknown parameters. The method shown utilizes the pseudoinverse in the solution. The essence of the approach is linear state estimation. Several alternative types of orthogonal expansions are briefly discussed. Although solutions are the same in all domains, one wishes to employ the expansion that gives the most efficient computation. The approach may be used for static as well as dynamic problems. The approach is tested for noise corruption likely to be found in measurements. The method is found to be suitable for the processing of digital fault recorder data to identify synchronous machine parameters MH - Mexico|Michoacan MH - USA PB - BRISTOL: HEMISPHERE PUBL CORP RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0731-356X UR - ISI:000087975000007 L2 - TIME-VARYING SYSTEMS; LAGUERRE-POLYNOMIALS; BILINEAR-SYSTEMS; IDENTIFICATION SO - Electric Machines and Power Systems 2000 ;28(8):761-777 1664 UI - 14740 AU - Rios-Jara E AU - Gonzalez JG AD - Univ Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Lab Ecosistemas Marinos & Acuicultura, Dept Ecol, Zapopan 45030, Jalisco, MexicoUniv Puerto Rico, Dept Marine Sci, Lajas, PR 00667, USARios-Jara, E, Univ Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Lab Ecosistemas Marinos & Acuicultura, Dept Ecol, Apartado Postal 52-114, Zapopan 45030, Jalisco, Mexico TI - Effects of lunar periodicity on the emergence behavior of the demersal copepod Pseudodiaptomus cokeri in Phosphorescent Bay, Puerto Rico AB - This study examined the emergence behavior of Pseudodiaptomus cokeri, a demersal copepod species found in Phosphorescent Bay, Puerto Rico. Surface plankton net tows, sledge-net tows, emergence traps and hand-net tows were used to examine day/night variations in vertical distribution associated with substratum type and lunar periodicity. Greater emergence of adult and copepodite instars of P. cokeri predominately occurred at full moon (one-way ANOVA, Fisher's PLSD, P < 0.05). Copepodites of P. cokeri emerge in greater numbers to the surface than adults during moonlit nights, which suggests that the degree of vertical migration becomes less pronounced with age (one-way ANOVA, P < 0.05). This copepod was more common in samples from seagrass and sand + macroalgae, the two most structurally complex substrata (one-way ANOVA, Fisher's PLSD, P < 0,05), indicating that substratum heterogeneity enhances densities of animals on the bottom MH - Mexico|Jalisco MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000165750900002 L2 - DIEL VERTICAL MIGRATION; GREAT-BARRIER-REEF; MEIOBENTHIC COPEPODS; PLANKTONIC COPEPODS; CALANUS-PACIFICUS; SEAGRASS BEDS; INLAND SEA; ZOOPLANKTON; PATTERNS; LAGOON SO - Bulletin of Marine Science 2000 ;67(3):887-901 1665 UI - 15401 AU - Ripa P AD - CICESE, Ensenada, Baja California, MexicoRipa, P, CICESE, POB 434844, San Diego, CA 92143, USA TI - Effects of the earth's curvature on the dynamics of isolated objects. Part I: The disk AB - A disk over the frictionless surface of the earth shows an interaction between the center of mass and internal motions. At low energies, the former is an "inertial oscillation" superimposed to a uniform zonal drift c and the latter is a rotation with variable vertical angular velocity omega (as measured by a terrestrial observer). The dynamics is understood best in a stereographic frame following the secular drift. The center of mass has a circular but not uniform motion; its meridional displacement induces the variations of the orbital and internal rotation rates. On the other hand, the temporal mean of the Coriolis forces due to both rotations produces the secular drift. In spherical terrestrial coordinates geometric distortion complicates the description. For instance, the zonal velocity of the center of mass U is not equal to the average zonal component of the particle velocities (u), as a result of the earth's curvature. The drift c and the temporal means (U) over bar and ((u)) over bar are all three different. In addition, omega differs from the local vertical angular velocity sigma (as measured by an observer following the disk). The classical "beta plane" approximation predicts correctly the value of c but makes order-one errors in everything else (e.g., it makes (U) over bar = ((u)) over bar = c and omega = sigma). The results of this paper set up the basis to study curvature effects on an isolated vortex. This, more difficult, problem is discussed in Parr II MH - Mexico|Baja California MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Oceanography U5 - J;Article AV - English IS - 0022-3670 UR - ISI:000088911700017 L2 - BETA-PLANE; ISOLATED EDDIES; MOTION; TRANSLATION SO - Journal of Physical Oceanography 2000 ;30(8):2072-2087 1666 UI - 15685 AU - Rito-Palomares M AU - Lyddiatt A AD - Inst Tecnol & Estudios Super Monterrey, Ctr Biotecnol, Monterrey 64849, NL, MexicoUniv Birmingham, Sch Chem Engn, Ctr Biochem Engn, Biochem Recovery Grp, Birmingham B15 2TT, W Midlands, EnglandRito-Palomares, M, Inst Tecnol & Estudios Super Monterrey, Ctr Biotecnol, Campus Monterrey,Sucursal Correos J, Monterrey 64849, NL, Mexico TI - Practical implementation of aqueous two-phase processes for protein recovery from yeast AB - A two-stage extraction process for the recovery of intracellular proteins from brewers' yeast was selected as a practical model system to study the implementation of polyethylene glycol (PEG)-phosphate aqueous two-phase systems (ATPS). Disrupted all suspensions generated by homogenisation and bead milling were used to study the impact of cell debris upon the partition behaviour of the intracellular products (bulk protein, fumarase and pyruvate kinase). Regardless of their origin debris particles did not significantly influence the partition behaviour of the intracellular products in selected ATPS distant from the binodal and at volume ratios greater than one. Recycling of used PEG into the initial extraction stage did not significantly influence the protein partition behaviour in batch ATPS. In the polymer recycling studies in continuous ATPS using spray columns, the addition of fresh materials to make up the deficits of phase-forming chemicals compensate any negative effect of the continuous recycling of the top PEG-rich phase. The findings of these studies raise the potential application of ATPS processes for protein recovery from complex biological systems. (C) 2000 Society of Chemical Industry MH - United Kingdom MH - Mexico|Nuevo Leon PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 15 U4 - Biotechnology & Applied Microbiology;Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0268-2575 UR - ISI:000088042400017 L2 - aqueous two-phase partitioning;protein recovery;disrupted yeast;polymer recycle;EXTRACTIVE ENZYME RECOVERY; 2-PHASE SYSTEMS; CELL DISRUPTION; FRACTIONATION; GALACTOSIDASE; PARTITION; PURIFICATION; SEPARATION; BIOMASS; POLYMER SO - Journal of Chemical Technology and Biotechnology 2000 ;75(7):632-638 1667 UI - 16580 AU - Rito-Palomares M AU - Dale C AU - Lyddiatt A AD - Inst Tecnol & Estudios Super Monterrey, Ctr Biotecnol, Monterrey 64849, NL, MexicoUniv Birmingham, Sch Chem Engn, Ctr Biochem Engn, Biochem Recovery Grp, Birmingham B15 2TT, W Midlands, EnglandRito-Palomares, M, Inst Tecnol & Estudios Super Monterrey, Ctr Biotecnol, Campus Monterrey,Sucursal Correos J, Monterrey 64849, NL, Mexico TI - Generic application of an aqueous two-phase process for protein recovery from animal blood AB - The recovery of proteins from animal blood using an established two-stage extraction process was selected as a practical model system to study the generic application of polyethylene glycol (PEG)-phosphate aqueous two-phase systems (ATPS). Processing of whole bovine blood in the ATPS two-stage process resulted in the partition of soluble protein (e.g. bovine serum albumin (BSA), haemoglobin, IgG; partition coefficient K = 55) into a PEG-rich top phase and cell debris into a phosphate-rich bottom phase. Subsequent back extraction of soluble protein into a second phosphate-rich bottom phase resulted in a maximum overall protein recovery of 62%. The increased protein concentration within the ATPS (from 1.2 to 7.0 mg/g) caused a decreased in the recovery to 44%. Recycling of PEG into the initial extraction stage did not significantly influence the partition behaviour of protein over the equivalent of 20 operational cycles, but protein recovery decreased from 44 to 37%. The extreme conditions (waste material characterised by the presence of solids and impurities) in which the implementation of this ATPS process was tested, confirms the potential for the generic application of ATPS for processing complex biological suspensions to achieve a simple primary recovery and partial purification of target protein solutes. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Nuevo Leon PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0032-9592 UR - ISI:000084957400004 L2 - aqueous two-phase systems;protein recovery;bovine blood;polymer recycling;EXTRACTIVE PURIFICATION; ENZYMES; SYSTEMS SO - Process Biochemistry 2000 ;35(7):665-673 1668 UI - 14469 AU - Rivas-Arancibia S AU - Willing AE AU - Zigova T AU - Rodriguez AI AU - Cahill DW AU - Sanberg PR AD - UNAM, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoUniv S Florida, Coll Med, Dept Neurosurg, Ctr Aging & Brain Repair, Tampa, FL 33612, USAUniv S Florida, Coll Med, Neurosci Program, Tampa, FL 33612, USAUniv S Florida, Dept Psychol, Tampa, FL 33612, USARivas-Arancibia, S, UNAM, Fac Med, Dept Fisiol, AP 70-250, Mexico City 04510, DF, Mexico TI - The effects of taurine on hNT neurons transplanted in adult rat striatum AB - Taurine acts as an antioxidant able to protect neurons fi om free radical-mediated cellular damage. Moreover, it modulates the immune response of astrocytes that participate in neurodegenerative processes. The objective of this study was to examine whether taurine can prevent or attenuate the host inflammatory response induced by the xenotransplantation of neurons derived from the human teratocarcinoma cell line (hNT neurons). Male Sprague-Dawley rats were treated IP with either saline or taurine. Animals from both groups were perfused on the 4th or 11th day and the saline or taurine was administered from the start of the study until the day prior to sacrifice. The brains were processed immunohistochemically using antibodies against glial fibrillary acidic protein (GFAP), microglia (OX42), and human nuclear matrix antigen (NuMA). In the saline group, NuMA labeling revealed small grafts on the 4th day and no surviving cells on the 11th day. However, in the group that received taurine there were surviving grafts at both time points. Strong immunoreactivity for GFAP and OX42, was detected in the saline group surrounding the transplant. These effects were reduced in animals receiving taurine. Taken together, these results demonstrated that taurine was able to facilitate graft survival and attenuate the immune response generated by the xenograft MH - Mexico|Distrito Federal MH - USA PB - ELMSFORD: COGNIZANT COMMUNICATION CORP RP - NOT IN FILE U3 - TC 7 U4 - Cell Biology;Transplantation U5 - J;Article AV - English IS - 0963-6897 UR - ISI:000166532900002 L2 - taurine;striatum;xenograft;oxidative stress;antioxidant effects;CENTRAL-NERVOUS-SYSTEM; HUMAN CELL-LINE; SERTOLI-CELLS; IN-VITRO; TYROSINE-HYDROXYLASE; PARKINSONS-DISEASE; PROGENITOR CELLS; ISCHEMIC RATS; BRAIN-INJURY; GLIAL-CELLS SO - Cell Transplantation 2000 ;9(6):751-758 1669 UI - 15632 AU - Rivas-Silva JF AU - Durand-Niconoff S AU - Schmidt TM AU - Berrondo M AD - Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Puebla 72570, Pue, MexicoUniv Fed Uberlandia, Dept Fis, BR-38400902 Uberlandia, MG, BrazilBrigham Young Univ, Dept Phys & Astron, Provo, UT 84602, USARivas-Silva, JF, Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Apdo Postal J-48, Puebla 72570, Pue, Mexico TI - Theoretical explanation of the quenching of luminescence in cerium-doped ytterbium oxyorthosilicate AB - A remarkable result in applied solid-state physics is that whereas Ce-doped yttrium oxyorthosilicate, Y-2(SiO4)O:Ce, is an excellent scintillator, the related Ce-doped ytterbium oxyorthosilicate, Yb-2(SiO4)O:Ce, does not scintillate at all at room temperature. These compounds, Y and Yb, besides possessing the same crystal structure, both are trivalent and yield almost identical ionic radii. In order to understand the difference between the luminescent properties of these materials, we have performed an ab initio calculation to investigate the charge-transfer mechanism involving their first excited states. By using a representative cluster model, a crossing is found between the ground and the excited state of the ytterbium compound, though not so in the yttrium compound. This suggests that in the solid state, the luminiscence quenching can occur via a nonradiative transition, although luminescence at low temperature might thus be feasible. (C) 2000 John Wiley & Sons, Inc MH - Brazil MH - Mexico|Puebla MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000088283100005 L2 - optical materials;ab initio calculations;quenching;quenching by charge transfer SO - International Journal of Quantum Chemistry 2000 ;79(3):198-203 1670 UI - 15694 AU - Rivas-Silva JF AU - Durand-Niconoff JS AU - Berrondo M AD - Benemerita Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoBrigham Young Univ, Dept Phys & Astron, Provo, UT 84602, USARivas-Silva, JF, Benemerita Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Electronic calculations on fluorides and oxides of Zr, Hf and Th AB - The band gaps of the oxides and fluorides of zirconium, hafnium and thorium are calculated by means of two quantum chemical methods. Through the first the gap is estimated as a one-electron energy given by the HUMO-LOMO splitting, while through the second it is obtained as the energy difference between electronic potentials of crystal clusters computed at their experimental configuration. Doping effects for these compounds are also analyzed via substitutional impurities on Pr4+ sites. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0256 UR - ISI:000088078800008 L2 - electronic structure;ab initio methods;semi-empirical calculations;optical properties of materials;detection of radiation;IONIC-CRYSTALS SO - Computational Materials Science 2000 ;18(2):193-198 1671 UI - 16371 AU - Rivas-Silva JF AU - Rodriguez-Merino L AU - Berrondo M AU - Flores-Riveros A AD - Benemerita Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoBrigham Young Univ, Dept Phys & Astron, Provo, UT 84602, USARivas-Silva, JF, Benemerita Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Ab initio calculations for absorption and emission energies of alkali halide crystals eloped with thallium AB - We calculate transition energies associated with optical properties of thallium doping in alkali halide crystals via an atomic cluster of minimal size where an sp-valence-shell impurity enters as a substitutional defect in the model crystal. Hartree-Fock (HF), density functional theory (DFT), and configuration interaction (CI) [CIS (CT with single excitation) and QCISD (single plus double and quadruple excitation)] calculations are performed to theoretically obtain the absorption and emission energies as vertical transitions evaluated at the ground and first excited-state optimized geometries, respectively, where the optimization is carried out separately with the HF and DFT methods. (C) 2000 John Wiley & Sons, Inc MH - Mexico|Puebla MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000085977200010 L2 - luminescence;alkali halides;defects in solids;optical properties;quantum chemical calculations in clusters SO - International Journal of Quantum Chemistry 2000 ;77(4):785-790 1672 UI - 15902 AU - Rivas F AU - Davalos IP AU - Olivares N AU - Davalos NO AU - Perez-Medina R AU - Gomez-Partida G AU - Chakraborty R AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Genet, Guadalajara 44310, Jalisco, MexicoUniv Guadalajara, CUCS, Guadalajara 44430, Jalisco, MexicoHosp Ginecoobstet, Ctr Med Nacl Occidente, Inst Mexicano Seguro Social, Serb Embrarazo Alto Riesgo, Guadalajara, Jalisco, MexicoHosp Ginecoobstet, Ctr Med Nacl Occidente, Inst Mexicano Seguro Social, Serv Fisiol Obstet, Guadalajara, Jalisco, MexicoUniv Texas, Hlth Sci Ctr, Sch Publ Hlth, Ctr Human Genet, Houston, TX, USARivas, F, Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Genet, Apartado Postal 1-3838, Guadalajara 44310, Jalisco, Mexico TI - Reproductive history in mothers of children with neural tube defects AB - The reproductive history of 100 women with at least 1 child with a neural tube defect (NTD) has been studied. The data analyzed correspond to the period previous to their first visit to a genetic counseling service. A total of 204 pregnancies resulted in 205 outcomes. Of the 100 sibships, 14 (14%) had more than 1 affected member, The pregnancy was shorter than 28 weeks in 56/205 (27%) of the total outcomes. Of 104 evaluable previous outcomes, 34 corresponded to short pregnancies, positioned before an affected (23/60, 38%), a healthy (2/18, 11%), or an undiagnosed product (9/26, 35%). Short pregnancies subsequent to affected outcomes were also increased, The inter-gestational interval varied according to diagnosis: it was longer in the affected group than in the healthy one (0.1 > p > 0.05) and the subsequent intervals were shorter for the affected group (p < 0.05), An increased number of abortions adjacent to affected offspring and a changing fertility pattern, depending on the product diagnosis, po int to an environ mental etiological component in this high-risk NTD group of mothers. Copyright (C) 2000 S. Karger AG, Basel MH - Mexico|Jalisco MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 3 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0378-7346 UR - ISI:000087441700009 L2 - neural tube defects;reproductive history;MATERNAL FERTILITY; PREGNANCY; ABORTION; RISK SO - Gynecologic and Obstetric Investigation 2000 ;49(4):255-260 1673 UI - 16484 AU - Rivera-Alvarez Z AU - Hernandez L AU - Becerril M AU - Picos-Vega A AU - Zelaya-Angel O AU - Ramirez-Bon R AU - Vargas-Garcia JR AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Sonora, Ctr Invest Fis, Hermosillo 8319, Sonora, MexicoIPN, Dept Ingn Met, Mexico City 07300, DF, MexicoUniv La Habana, Fac Fis, La Habana 10400, CubaZelaya-Angel, O, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - DX centers and persistent photoconductivity in CdTe-In films AB - In this work, we study the nature and behavior of the persistent photoconductivity (PPC) in CdTe-In films grown by cosputtering of CdTe-In-Cd targets, It was found that only when Ln atoms are substantially incorporated into CdTe films, the persistent photoconductivity is observed with a quenching temperature of about 270 K, We have also investigated the trapping centers in the CdTe films by using the thermally stimulated conductivity technique. Two localized deep levels were determined. One of them, with an activation energy of 0.42 eV, has been ascribed as a direct evidence of DX centers that are formed by Cd vacancies and In donors complexes, By formulating the PPC build-up and decay kinetics, we have associated the PPC effect in our films to the photoionization of this deep level (DX like centers). Up to date, the existence of DX centers in CdTe-In polycrystalline films have not been previously reported. (C) 2000 Elsevier Science Ltd, All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000085417100005 L2 - thin films;impurities in semiconductors;electronic states (localized);photoconductivity and photovoltaics;POLYCRYSTALLINE FILMS; SEMICONDUCTORS; ALLOYS; AL0.3GA0.7AS; ALXGA1-XAS; RELAXATION; KINETICS; LAYERS SO - Solid State Communications 2000 ;113(11):621-625 1674 UI - 15077 AU - Rivera-Garza M AU - Olguin MT AU - Garcia-Sosa I AU - Alcantara D AU - Rodriguez-Fuentes G AD - Inst Nacl Invest Nucl, Dept Quim, Mexico City 11801, DF, MexicoUniv Autonoma Estado Mexico, Fac Quim, Toluca, MexicoUniv La Habana, Lab Ingn Zeolitas, La Habana, CubaOlguin, MT, Inst Nacl Invest Nucl, Dept Quim, AP 18-1027,Col Escandon,Delegac Miguel Hidalgo, Mexico City 11801, DF, Mexico TI - Silver supported on natural Mexican zeolite as an antibacterial material AB - The antimicrobial effect of the Mexican zeolitic mineral from Taxco, Guerrero exchanged with silver ions was investigated. The zeolitic mineral as well as sodium and silver zeolitic minerals were characterized by using X-ray diffraction, electron microscopy and IR spectroscopy techniques. The elementary composition of the zeolitic mineral was determined by atomic absorption and microanalyses (EDAX), Escherichia coli and Streptococcus faecalis as indicators of fecal contamination of water were chosen to achieve the antibacterial effect of the Mexican silver zeolitic mineral. The amount of silver in water after contact with the Mexican silver zeolitic mineral as a function of both time and initial sodium concentration in liquid media using Ag-110m and Na-22 as radiotracers was analyzed. It was found that the Mexican silver clinoptilolite-heulandite mineral eliminated the pathogenic microorganisms E. coli and S. faecalis from water with the highest amount of silver supported on the mineral after 2 h of contact time. Under these conditions, the silver level in water remained in 50 mu g1(-1) (NOM-041-SSA1-1993). (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 37 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000089735100002 SO - Microporous and Mesoporous Materials 2000 ;39(3):431-444 1675 UI - 15848 AU - Rivera-Gaxiola M AU - Csibra G AU - Johnson MH AU - Karmiloff-Smith A AD - Ctr Neurobiol, Lab Psicofisiol B06, Queretaro 76230, MexicoUniv London Birkbeck Coll, Ctr Brain & Cognit Dev, London WC1E 7HX, EnglandInst Child Hlth, Neurocognit Dev Unit, London WC1N 1EH, EnglandRivera-Gaxiola, M, Ctr Neurobiol, Lab Psicofisiol B06, Campus UNAM UAQ Juriquilla, Queretaro 76230, Mexico TI - Electrophysiological correlates of cross-linguistic speech perception in native English speakers AB - The present study examined the electrophysiological responses that Native English speakers display during a passive oddball task when they are presented with different types of syllabic contrasts, namely a labial /ba/-dental /da/, a Hindi dental /da/-retroflex /da/ and a within-category (two /ba/ tokens) contrasts. The analyses of the event-related potentials obtained showed that subjects pre-attentively perceive the differences in all experimental conditions, despite not showing such detection behaviourally in the Hindi and within-category conditions. These results support the notion that there is no permanent loss of the initial perceptual abilities that humans have as infants, but that there is an important neural reorganisation which allows the system to overcome the differences detected and only be aware of contrasts that are relevant in the language which will become the subjects native tongue. We also report order asymmetries in the ERP responses and suggest that the percepts and not only the physical attributes of the stimuli have to be considered for the evaluation of the responses obtained. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000087631800002 L2 - cognitive neuroscience;event-related potentials;cross-linguistic speech perception;MMN;LP;neural reorganisation;MISMATCH NEGATIVITY; BRAIN; DISCRIMINATION; STIMULUS; INFANTS; REPRESENTATION; POTENTIALS; CATEGORIES; ADULTS; MEMORY SO - Behavioural Brain Research 2000 ;111(1-2):13-23 1676 UI - 15849 AU - Rivera-Gaxiola M AU - Johnson MH AU - Csibra G AU - Karmiloff-Smith A AD - UNAM UAQ, Lab Psicofisiol B06, Ctr Neurobiol, Queretaro 76230, MexicoUniv London Birkbeck Coll, Ctr Brain & Cognit Dev, London WC1E 7HX, EnglandInst Child Hlth, Neurocognit Dev Unit, London WC1N 1EH, EnglandRivera-Gaxiola, M, UNAM UAQ, Lab Psicofisiol B06, Ctr Neurobiol, Campus Juriquilla, Queretaro 76230, Mexico TI - Electrophysiological correlates of category goodness AB - We report the results obtained from a behavioural and electrophysiological study. A synthesised continuum going from labial /ba/ to retroflex /da/ through dental /da/ was tested for category goodness. Native English speakers rated different tokens from each category as good, bad or ambiguous. The results showed that not all of the representatives of each category were ideal and that the categories tested have an internal structure. The electrophysiological study evaluated whether event related potentials (ERPs) mirrored the goodness judgements. During a passive oddball task, the same participants were exposed to native /ba/-/da/, Hindi dental /da/-retroflex /da/ and within-category /ba/-/ba/ contrasts. Results showed that participants pre-attentively perceive the differences in all cases, as shown by mis-match negativities (MMN), late positive deflections (LPD) or greater N1 and/or P2 components for deviant stimuli. Acoustic sensitivities, categorical perception and category goodness all contributed to the waveforms obtained. We attribute the ERP effects to a combination of (1) prototypes built from initial sensitivities, (2) reinforcement with exposure to one's native language and (3) no permanent loss of the initial boundaries explains the effects observed. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000087629900001 L2 - category-goodness;cognitive neuroscience;event-related potentials (ERP);late positive deflections (LPD);mis-match negatives (MMN);perceptual magnet effect;synthesised speech;INTERNAL STRUCTURE; PHONETIC CATEGORIES; PERCEPTION; SPEECH; PROTOTYPES; REPRESENTATION; POTENTIALS; INFANTS; ADULTS SO - Behavioural Brain Research 2000 ;112(1-2):1-11 1677 UI - 15780 AU - Rivera-Morales L AU - Rodriguez-Padilla C AU - Novitsky V AU - Lavalle C AU - Ramos-Jimenez L AU - Vannberg F AU - Tamez-Guerra R AU - Trujillo R AU - Essex M AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, San Nicolas De Los Garza, Nuevo Leon, MexicoHarvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USA TI - The molecular epidemiology of HIV-1 in homosexual men in Mexico MH - Mexico|Nuevo Leon MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000086643100151 SO - Faseb Journal 2000 ;14(6):A938-A938 1678 UI - 15946 AU - Rivera A AU - Leon JF AU - Rivera J AU - Parra EC AU - Purmova J AU - Burgueno-Tapia E AU - Joseph-Nathan P AD - Univ Nacl Colombia, Dept Quim, Santafe de Bogota, DC, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRivera, A, Univ Nacl Colombia, Dept Quim, Ciudad Univ AA 14490, Santafe de Bogota, DC, Colombia TI - Synthesis of 2t-substituted-1r,3c-bis(2 '-hydroxy-5 '- substituted-benzyl)-imidazolidines by reaction of 1,3-bis(2 '-hydroxy-5 '-substituted-benzyl)-imidazolidines with aromatic aldehydes AB - A one-step synthesis of 2t-substituted-1r,3c-bis(2'-hydroxy-5'-substituted-benzyl)-imidazolidine s from 1,3-bis(2'-hydroxy-5'-substituted-benzyl)-imidazolidines and aromatic aldehydes is reported. The relative stereochemistry of the five-membered ring was evident from H-1 NMR measurements combined with MMX calculations MH - Colombia MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0039-7911 UR - ISI:000087144000017 SO - Synthetic Communications 2000 ;30(11):2029-2040 1679 UI - 15796 AU - Rivera JHV AU - Haas CA AU - Rappole JH AU - Mcshea WJ AD - Virginia Polytech Inst & State Univ, Dept Fisheries & Wildlife Sci, Blacksburg, VA 24061, USASmithsonian Inst, Conservat & Res Ctr, Front Royal, VA 22630, USARivera, JHV, Apartado Postal 21, San Patricio 48980, Jalisco, Mexico TI - Parental care of fledgling Wood Thrushes AB - We report the study of parental care of Wood Thrush (Hylocichla mustelina) fledglings from nest-leaving to independence. From 1993 to 1995, we captured, radio-tagged, and monitored the movements and behavior of 23 fledglings and their parents from 12 broods at the U.S. Marine Corps Base, Quantico, Virginia. For pairs that subsequently renested (n = 5), the family group of male, female, and fledglings, remained within 62 (+/-5 SE) m of the first nest after fledging, During the period of post-fledging parental care, mean maximum distance between parents was 70 (+/-14) m. Females attended the young 13 (+/-1.3) days before initiating the incubation of a second clutch. Males continued attending the fledglings for 6 (+/-0.7) more days until the young achieved independence and dispersed (28-36 days post-hatching). In final clutches (n = 73, brood care was divided between the parents, and the position of the fledglings relative to the nest depended on the parents' choice of molting site tin the nesting area or elsewhere). Division of the brood by the parents has been thought to be a strategy to reduce predation and increase foraging efficiency. However, in the Wood Thrush and other species, joint attendance of initial broods, but division of final broods, suggest that other factors could be important for the parents' decision of whether or not to split the brood MH - Mexico|Jalisco MH - USA PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000087671900007 L2 - MIXED REPRODUCTIVE STRATEGIES; BROOD DIVISION; ROBINS SO - Wilson Bulletin 2000 ;112(2):233-237 1680 UI - 16616 AU - Rivera JL AU - Alejandre J AU - Nath SK AU - de Pablo JJ AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USASimulac Mol Inst Mexicano Petr, Mexico City 07730, DF, MexicoMol Simulat Inc, San Diego, CA 92121, USAAlejandre, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Thermodynamic and transport properties of nitrogen and butane mixtures AB - A force field has been developed to describe the phase behaviour, interfacial, and transport properties of nitrogen and hydrocarbon mixtures under conditions relevant to those found in the high pressure extraction of oil from underground reservoirs. A Gibbs ensemble Monte Carlo method is used to parametrize intermolecular potentials for the pure components by matching experimental and simulated liquid and vapour coexisting densities. Also the surface tension, diffusion coefficient and shear viscosity of nitrogen and its mixtures with butane: have been determined. The latter properties were obtained by canonical molecular dynamics simulations. The diffusion coefficient and shear viscosity were calculated by a Green-Kubo method. Results for pure nitrogen are given for temperatures ranging from 70 K to 110 K. For mixtures of nitrogen with butane, results are presented at 339.4 K and 380.2 K. Good agreement is found between the results of simulations and available experimental data MH - Mexico|Distrito Federal MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 16 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000084734100004 L2 - VAPOR-LIQUID-EQUILIBRIA; MONTE-CARLO SIMULATION; PHASE COEXISTENCE; ENSEMBLE SO - Molecular Physics 2000 ;98(1):43-55 1681 UI - 16687 AU - Rivera MA AU - Sebastian PJ AU - Gamboa SA AU - Hermann AM AD - UNAM, Energy Res Ctr, Temixco 62580, Morelos, MexicoUniv Colorado, Dept Phys, Boulder, CO 80309, USARivera, MA, UNAM, Energy Res Ctr, Temixco 62580, Morelos, Mexico TI - Electrochemical hydrogen absorption in Ni foam AB - An electrochemical hydrogen absorption-desorption study was carried out on Ni foam. The cyclic voltametry analysis of Ni foam in NaOH solution confirmed that there is hydrogen absorption during the electrochemical process. The cathodic peak observed during voltametry may be assigned to an adsorption pre-wave due to water electroreduction to H-ab The peak of this wave is located at a potential which is more positive than that for hydrogen evolution (epsilon(H2) = +/- 1.14 V) The hydride formation (implying a change in the electronic state of the H atoms) starts in the sub-surface layer, where the hydrogen atoms are close to the surface. The anodic peak observed in the voltammogram is interpreted as the hydrogen desorption maxima. (C) 1999 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000084301900002 L2 - METAL HYDRIDE SO - International Journal of Hydrogen Energy 2000 ;25(3):197-202 1682 UI - 16695 AU - Rivero R AU - Le Goff P AD - Lab Sci Genie Chim, F-54001 Nancy, FranceInst Mexicano Petr, Mexico City 07730, DF, MexicoLe Goff, P, Lab Sci Genie Chim, 1 Rue Grandville, F-54001 Nancy, France TI - Heat pumps with diabatic distillation AB - The authors propose a method of enhancing the performance of absorption heat pumps. This method involves "diabatization" of each of the four components: desorber, condenser, evaporator and absorber. (C) 1999 Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Engineering, Mechanical U5 - J;Article AV - French IS - 0140-7007 UR - ISI:000084074900003 L2 - absorption;heat pump;design;performance SO - International Journal of Refrigeration-Revue Internationale du Froid 2000 ;23(1):26-30 1683 UI - 13185 AU - Riveron AM AU - Lopez-Canovas L AU - Baez-Camargo M AU - Flores E AU - Perez-Perez G AU - Luna-Arias JP AU - Orozco E AD - IPN, CINVESTAV, Dept Expt Pathol, Mexico City 07300, DF, MexicoNatl Ctr Sci Res, Dept Mol Biol, Neurosci Branch, Havana, CubaIPN, CICATA, Mol Biomed Program, Mexico City 11500, DF, MexicoIPN, CINVESTAV, Multidisciplinary Program Mol Biomed, Mexico City 07300, DF, MexicoOrozco, E, IPN, CINVESTAV, Dept Expt Pathol, AP 14-740, Mexico City 07300, DF, Mexico TI - Circular and linear DNA molecules in the Entamoeba histolytica complex molecular karyotype AB - Entamoeba histolytica genome was analysed by pulsed field gel electrophoresis under conditions to separate linear chromosomes in the 170-1400 kb range. We identified linear DNA molecules of 227, 366, 631, 850, 1112 and 1361 kb (mean sizes obtained by three different methods) and we estimated their reorientation times and migration velocities at various experimental conditions. DNA shift mobility assays, using ethidium bromide, suggested that bands migrating at 227 and 631 kb contain linear and circular DNA, whereas a band at 436 kb has only circular DNA. We obtained a regression equation relating sizes of supercoiled DNA molecules with their migration velocities during a pulse at constant electric field and temperature. We also developed a computer program (EHPATTERNS) that predicts the migration per pulse and the resolution order of circular and linear E. histolytica DNA at different pulse times and constant driving and frictional forces. The simulation showed that linear DNA molecules frequently co-migrate with circular molecules, but circular molecules change when the pulse time varies. This molecular mixture generates broad bands and difficulties in the interpretation of the molecular karyotype of E. histolytica MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Biophysics U5 - J;Article AV - English IS - 0175-7571 UR - ISI:000170169400006 L2 - Entamoeba histolytica;linear and circular DNA;migration velocities;reorientation time;pulsed field;FIELD GEL-ELECTROPHORESIS; REORIENTATION TIME; SIZE; IDENTIFICATION; MIGRATION; TOPOLOGY; GENE SO - European Biophysics Journal with Biophysics Letters 2000 ;29(1):48-56 1684 UI - 14642 AU - rmendariz-Borunda J AU - Siller F AU - Salgado S AU - Garcia-Banuelos J AU - Vera J AU - Miranda A AU - Grijalva G AU - Segura J AU - guilar-Cordova E AD - Harvard Univ, Boston, MA 02115, USAUniv Guadalajara, Guadalajara 44430, Jalisco, Mexico TI - A clinical-grade adenoviral-vector encoding MMP-8 as tool to reverse hepatic fibrosis MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000089622400065 SO - Hepatology 2000 ;32(4):178A-178A 1685 UI - 14643 AU - rmendariz-Borunda J AU - Salgado S AU - Garcia J AU - Vera J AU - Siller F AU - Miriam B AU - Miranda A AU - Segura A AU - Grijalva G AU - Segura J AU - Hernandez-Pando R AU - guilar-Cordova E AD - Univ Guadalajara, CUCS, Guadalajara 44430, Jalisco, MexicoInst Nutr, Mexico City, DF, MexicoHarvard Univ, Boston, MA 02115, USA TI - Reversal of hepatic cirrhosis with urokinase-plasminogen activator gene therapy MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000089622400554 SO - Hepatology 2000 ;32(4):301A-301A 1686 UI - 14645 AU - rmendariz-Borunda J AU - Garcia-Banuelos J AU - Segura J AU - guilar-Cordova E AD - Univ Guadalajara, CUCS, Guadalajara 44430, Jalisco, MexicoHarvard Univ, Boston, MA 02115, USA TI - Preclinical study to monitor for adenoviral safety in cirrhotic rats MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000089622401234 SO - Hepatology 2000 ;32(4):471A-471A 1687 UI - 14747 AU - rnaiz-Villena A AU - Vargas-Alarcon G AU - Granados J AU - Gomez-Casado E AU - Longas J AU - Gonzales-Hevilla M AU - Zuniga J AU - Salgado N AU - Hernandez-Pacheco G AU - Guillen J AU - Martinez-Laso J AD - Univ Complutense Madrid, Hosp 12 Octubre, Dept Immunol, Madrid 28041, SpainInst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Biol Sect, Mexico City, DF, MexicoUniv Panamer, Escuela Med, Dept Mol Biol, Mexico City, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoArnaiz-Villena, A, Univ Complutense Madrid, Hosp 12 Octubre, Dept Immunol, Carretera Andalucia, Madrid 28041, Spain TI - HLA genes in Mexican Mazatecans, the peopling of the Americas and the uniqueness of Amerindians AB - The HLA allele frequency distribution of the Mexican Mazatecan Indians (Olmec culture) has been studied and compared with those of other First American Natives and worldwide populations (3 total of 12,100 chromosomes; 6,050 individuals from 59 different populations). The main conclusions are: 1) An indirect evidence of Olmec and Mayan relatedness is suggested, further supporting the notion that Olmecs may have been the precursors of Mayans; 2) Language and genetics do not completely correlate in microenvironmental studies; and 3) Peopling of the Americas was probably more complex than postulated by Greenberg and others (three peopling waves). Significant genetic input from outside is not noticed in Meso and South American Amerindians according to the phylogenetic analyses; while all world populations (including Africans, Europeans, Asians, Australians, Polynesians, North American Na-Dene Indians and Eskimos) are genetically related. Meso and South American Amerindians tend to remain isolated in the Neighbor-Joining, correspondence and plane genetic distance analyses MH - Mexico|Distrito Federal MH - Spain PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 43 U4 - Cell Biology;Immunology;Pathology U5 - J;Article AV - English IS - 0001-2815 UR - ISI:000165656400003 L2 - HLA;Mazatecans;Amerindians;Na-Dene;Eskimos;Asians;Polynesians;Siberians;CLASS-II ALLELES; NEW-WORLD; MITOCHONDRIAL-DNA; Y-CHROMOSOME; SEQUENCE POLYMORPHISMS; HAPLOTYPE FREQUENCIES; AUSTRALIAN ABORIGINES; PHYLOGENETIC TREES; NATIVE-AMERICANS; MTDNA VARIATION SO - Tissue Antigens 2000 ;56(5):405-416 1688 UI - 16124 AU - Roberts CL AU - Rivera JA AU - Flores M AU - Maulen I AU - Martorell R AD - Univ N Carolina, Chapel Hill, NC, USAInst Nacl Salud Publ, Mexico City, DF, MexicoInst Nacl Pediat, Mexico City, DF, MexicoEmory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322, USA TI - Infant feeding practices and growth outcomes at 6 and 20 months of age among Mexican children MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918102905 SO - Faseb Journal 2000 ;14(4):A502-A502 1689 UI - 15543 AU - Rocha CEF AU - Iliffe TM AU - Reid JW AU - Suarez-Morales E AD - Univ Sao Paulo, Inst Biociencias, Dept Zool, BR-05422970 Sao Paulo, BrazilTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USANatl Museum Nat Hist, Smithsonian Inst, Washington, DC 20560, USAEl Colegio Frontera Sur Chetumal, Quintana Roo 77000, MexicoRocha, CEF, Univ Sao Paulo, Inst Biociencias, Dept Zool, CP 11461, BR-05422970 Sao Paulo, Brazil TI - Prehendocyclops, a new genus of the subfamily Halicyclopinae (Copepoda, Cyclopoida, Cyclopidae) from cenotes of the Yucatan Peninsula, Mexico AB - Prehendocyclops, a new genus of Halicyclopinae, is described from cenotes of the Yucatan Peninsula, Mexico. Within the subfamily, the new genus resembles Halicyclops, Colpocyclops, and Smirnoviella in body shape as well as structure of the antennule and legs 1 to 5. In addition, Prehendocyclops shares with the latter two genera modifications in the antenna and mouth parts, which are here interpreted as structures used to hold onto some external part of a host. The possible host for the genus remains unknown. Prehendocyclops is characterized mainly in having an antennal prehensile device formed by a stout curved spine on the third segment, and the three proximalmost appendages of the terminal segment modified into stout, heavily serrate spines; the distalmost spine of these is claw-shaped. In addition, on the praecoxal arthrite of the maxillule the two outermost apical spines are curved towards a strong, straight, pointed spine inserted on the inner surface of the arthrite. The three species of Prehendocyclops described here (P. monchenkoi, P. boxshalli, and P abbreviatus) can be separated from each other by a combination of characters found in the integumental pore pattern of the body surface and legs 1-4, the number of tergal integumental windows, the shape of the seminal receptacle, and the armament of the caudal ramus, antenna, mouth parts, and legs 1, 4, and 5 of both sexes, as well as legs 5 and 6 of males MH - Brazil MH - Mexico|Quintana Roo MH - USA PB - BERGEN: UNIV BERGEN RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0036-4827 UR - ISI:000088504700002 L2 - Copepoda;Prehendocyclops;new genus;Caribbean Fauna;cenotes;Mexico SO - Sarsia 2000 ;85(2):119-140 1690 UI - 16380 AU - Rode AV AU - Gamaly EG AU - Luther-Davies B AD - Australian Natl Univ, Res Sch Phys Sci & Engn, Laser Phys Ctr, Canberra, ACT 0200, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoRode, AV, Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Appl Math, Canberra, ACT 0200, Australia TI - Formation of cluster-assembled carbon nano-foam by high-repetition-rate laser ablation AB - High-repetition-rate laser ablation and deposition of carbon vapours results in the formation of quite different carbonaceous structures depending on the pressure of the ambient Ar gas in the chamber. Diamond-like carbon films form at a pressure below approximate to 0.1 Torr whereas a diamondlike carbon nano-foam is created above 0.1 Torr. Although laser-deposited amorphous carbon films have been extensively investigated in the past, here we present what, to our knowledge, is the first report of the production of a granular low-density carbon nano-foam with rich fraction of sp(3) bonding. The bulk density of various foam samples was in the range (2-10) x 10(-3) g/cm(3), and the specific surface area was 300-400 m(2)/g. The resistivity of the foam measured at low-voltage (+/-30 V) is (1-3) x 10(9) Ohm cm at room temperature and (1-10)x 10(13) Ohm cm at 80 K. The dc conductivity of this low-density carbon foam and its temperature dependence appears to be very close to that of RF-sputtered solid amorphous diamond-like carbon films. The presented kinetic analysis of the carbon vapour in the Ar ambient demonstrates qualitative agreement between the predicted laser plume parameters and those measured in the experiments. Theoretical predictions of the parameters and the process of carbon vapour diffusion through the ambient gas, allow us to propose a self-consisted periodic model leading to the formation of the carbon clusters in the experimental chamber MH - Australia MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 39 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000085952800003 L2 - AMORPHOUS-CARBON; ULTRAFAST ABLATION; FILMS; DEPOSITION; IONIZATION; TRANSPORT SO - Applied Physics A-Materials Science & Processing 2000 ;70(2):135-144 1691 UI - 15419 AU - Rodriguez-Ardila A AU - Binette L AU - Pastoriza MG AU - Donzelli CJ AD - UFRGS, Dept Astron, BR-15051 Porto Alegre, RS, BrazilNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Cordoba, Astron Observ, IATE, RA-5000 Cordoba, ArgentinaRodriguez-Ardila, A, Univ Nacl Colombia, Astron Observ Nacl, Santafe de Bogota, Colombia TI - The narrow-line region of narrow-line Seyfert 1 galaxies AB - This work studies the optical emission-line properties and physical conditions of the narrow-line region (NLR) of seven narrow-line Seyfert 1 galaxies (NLS1's) for which high signal-to-noise ratio spectroscopic observations were available. The resolution is 340 km s(-1) (at H alpha) over the wavelength interval 370-9500 Angstrom, enabling us to separate the broad and narrow components of the permitted emission lines. Our results show that the flux carried out by the narrow component of H beta is, on average, 50% of the total line flux. As a result, the [O III] lambda 5007/H beta ratio emitted in the NLR varies from 1 to 5, instead of the universally adopted value of 10. This has strong implications for the required spectral energy distribution that ionizes the NLR gas. Photoionization models that consider a NLR composed of a combination of matter-bounded and ionization-bounded clouds are successful at explaining the low CO mi lambda 5007/H beta ratio and the weakness of low-ionization lines of NLS1's. Variation of the relative proportion of these two type of clouds nicely reproduces the dispersion of narrow-line ratios found among the NLS1 sample. Assuming similar physical model parameters of both NLS1's and the normal Seyfert 1 galaxy NGC 5548, we show that the observed differences of emission-line ratios between these two groups of galaxies can be explained, to a first approximation,:in terms of the shape of the input ionizing continuum. Narrow emission-line ratios of NLS1's are better reproduced by a steep power-law continuum in the EUV-soft X-ray region, with spectral index alpha similar to -2. Flatter spectral indices (alpha similar to -1.5) match the observed line ratios of NGC 5548 but are unable to provide a good match to the NLS1. ratios. This result is consistent with ROSAT observations of NLS1's, which show that these objects are characterized by steeper power-law indices than those of Seyfert 1 galaxies with strong broad optical lines MH - Argentina MH - Brazil MH - Colombia MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000088824800012 L2 - galaxies : nuclei;galaxies : Seyfert;X-rays : galaxies;ACTIVE GALACTIC NUCLEI; EMISSION-LINES; SPECTROSCOPY; CONTINUUM; SPECTRA; CLOUDS; AGN SO - Astrophysical Journal 2000 ;538(2):581-593 1692 UI - 16319 AU - Rodriguez-Frias MD AU - del Peral L AU - Perez-Peraza J AD - Univ Alcala de Henares, Dept Fis, Alcala De Henares 28871, Madrid, SpainUNAM, Inst Geofis, Mexico City 04510, DF, MexicoRodriguez-Frias, MD, Univ Alcala de Henares, Dept Fis, Alcala De Henares 28871, Madrid, Spain TI - Particle charge evolution during acceleration processes in solar flares AB - It has been customary to assume that the charge state of energetic particles corresponds to the ionization equilibrium of the ambient plasma within the acceleration region. Nonetheless, we ascribe to a different opinion, by suggesting that charge interchange mechanisms may be activated during the ensuing acceleration process. We substantiate our claim by the calculated behaviour of charge states corresponding to energized ions while they are accelerated in the source regions. These computations are based on the electron capture and loss cross sections. Results from the analysis allow us to conclude that, contrary to the general assumption, charge exchange processes may be invoked during the acceleration of energized ions in solar flares MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0954-3899 UR - ISI:000086111200008 SO - Journal of Physics G-Nuclear and Particle Physics 2000 ;26(3):259-265 1693 UI - 15140 AU - Rodriguez-Leyva E AU - Leyva JL AU - Gomez V AU - Barcenas NM AU - Elzen GW AD - Colegio Postgrad Ciencias Agr, Inst Fitosanidad, Texcoco 56230, Edo De Mexico, MexicoColegio Postgrad Ciencias Agr, Inst Recursos Genet & Product, Texcoco 56230, Edo De Mexico, MexicoARS, Beneficial Insects Res Unit, Subtrop Agr Res Ctr, USDA, Weslaco, TX, USARodriguez-Leyva, E, Colegio Postgrad Ciencias Agr, Inst Fitosanidad, Texcoco 56230, Edo De Mexico, Mexico TI - Biology of Catolaccus hunteri (Hymenoptera : Pteromalidae), a parasitoid of pepper weevil and boll weevil (Coleoptera : Curculionidae) AB - A general description of the life stages and population parameters of Catolaccus hunteri Crawford, an primary ectoparasitoid of pepper weevil, Anthonomus eugenii Cano, and bell weevil, Anthonomus grandis grandis Boheman, is presented. The parasitoids were reared on the unnatural host Callosobruchus maculatus F. The developmental time of C. hunteri at 27 +/- 1 degrees C was shorter in males than females. Males completed development in 11.46 +/- 0.46 d from egg to adult emergence. Developmental time in females required 13.18 +/- 0.81 d from egg to adult at the same temperature. A C. hunteri female (n = 20) laid 466.35 +/- 280.39 eggs, of which just 18.35% reached the adult stage; this could be the result of cannibalistic larval behavior combined with high superparasitism observed under laboratory conditions. Female mean longevity was 47.20 +/- 12.76 d. The net reproductive rate (Ro), the generation time (G), and the daily intrinsic rate of increase (rm) were 42.713, 33.842, and 0.111, respectively. The fecundity of pepper weevil and boll weevil is discussed MH - Mexico|Estado De Mexico MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000089632100018 L2 - Anthonomus Eugenii;Anthonomus grandis;biological control;unnatural hosts;GRANDIS BURKS HYMENOPTERA; ARTHROPOD PARASITES; ANTHONOMUS-GRANDIS; LONGEVITY; FECUNDITY; INCREASE SO - Annals of the Entomological Society of America 2000 ;93(4):862-868 1694 UI - 15104 AU - Rodriguez-Lopez JL AU - guilera-Granja F AU - Vega A AU - Alonso JA AD - Univ Autonoma San Luis, Inst Fis, San Luis Potosi 78000, MexicoUniv Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainRodriguez-Lopez, JL, Univ Autonoma San Luis, Inst Fis, San Luis Potosi 78000, Mexico TI - Magnetic interactions between small Ni clusters AB - We have calculated the magnetic moment per atom, <(mu)over bar>, of symmetric nickel cluster-dimers Ni-N-Ni-N as a function of cluster-cluster distance D and cluster size N. The spin-polarized electronic structure has been calculated with a self-consistent tight-binding method considering the 3d, 4s and 4p valence electrons. We have analyzed the partial sp and d contributions to <(mu)over bar> The d component shows a monotonic behavior and provides the dominant contribution to <(mu)over bar>, whereas the sp contribution shows a nonmonotonic land complex) behavior as a function of the distance and of cluster size. The approaching clusters change their intrinsic magnetic moments at separations of the order of the bulk first nearest-neighbor distance d(fn). For N = 5-7 there is a range of separations (1d(fn)-3d(fn)) where the cluster moments are slightly enhanced. (C) 2000 Published by Elsevier Science Ltd MH - Mexico|San Luis Potosi MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000089704300003 L2 - nanostructures;magnetically ordered materials;NICKEL CLUSTERS; METAL-CLUSTERS; TRANSITION; SURFACE; FE; MAGNETORESISTANCE; MONOLAYERS; MOMENTS; CU(111); COBALT SO - Solid State Communications 2000 ;116(6):309-314 1695 UI - 15850 AU - Rodriguez-Manzo G AU - Pellicer F AU - Larsson K AU - Fernandez-Guasti A AD - Ctr Invest & Estud Avanzados, Dept Farmacol & Toxicol, Mexico City 14000, DF, MexicoInst Mexicano Psiquiatria, Mexico City, DF, MexicoUniv Gothenburg, Gothenburg, SwedenRodriguez-Manzo, G, Ctr Invest & Estud Avanzados, Dept Farmacol & Toxicol, Apartado Postal 22026, Mexico City 14000, DF, Mexico TI - Stimulation of the medial preoptic area facilitates sexual behavior but does not reverse sexual satiation AB - The aim of the present study was to establish whether electrical and/or drug stimulation of the medial preoptic area/anterior hypothalamus (mPOA/AH) surmounts the sexual behavior inhibition that results from copulation to exhaustion. Thus, intermittent electrical stimulation of the mPOA/AH (alone or combined with the systemic injection of yohimbine or apomorphine, at doses that were subthreshold for reversing sexual exhaustion) or intrapreoptic treatments to block GABAergic transmission were applied to sexually satiated rats. The results suggest that the mPOA/AH is not responsible for male sexual behavior inhibition or for the pharmacologically induced sexual behavior expression in satiated rats. Data are discussed in terms of the roles ascribed to the mPOA/AH, both in the control of sexual behavior expression and in the regulation of the postejaculatory interval MH - Mexico|Distrito Federal MH - Sweden PB - WASHINGTON: AMER PSYCHOLOGICAL ASSOC RP - NOT IN FILE U3 - TC 17 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0735-7044 UR - ISI:000087650800009 L2 - EJACULATORY REFRACTORY PERIOD; BRAIN MONOAMINERGIC CONTROL; MALE REPRODUCTIVE-BEHAVIOR; RAT COPULATORY-BEHAVIOR; NUCLEUS PARAGIGANTOCELLULARIS; ELECTRICAL-STIMULATION; MATING-BEHAVIOR; MOTIVATION; EXHAUSTION; LESIONS SO - Behavioral Neuroscience 2000 ;114(3):553-560 1696 UI - 15144 AU - Rodriguez-Morales S AU - Salary H AU - Compadre RL AU - Zhou X AU - Breen PJ AU - Castillo R AU - Compadre CM AD - UNAM, Dept Pharm, Lab 122, Fac Quim, Mexico City 04710, DF, MexicoUniv Arkansas Med Sci, Dept Pharmaceut Sci, Little Rock, AR 72205, USAUniv Arkansas Med Sci, Food Safety Consortium Grp, Little Rock, AR 72205, USA TI - Molecular modeling, synthesis, and residue levels of cetylpyridinium chloride analogs with potential to improve food safety MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246200139 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U28-U28 1697 UI - 15429 AU - Rodriguez-Morales S AU - Salary H AU - Zhou X AU - Castillo R AU - Breen PJ AU - Compadre CM AD - Natl Autonomous Univ Mexico, Dept Pharm, Fac Quim, Lab 122, Mexico City 04710, DF, MexicoUniv Arkansas Med Sci, Dept Pharmaceut Sci, Little Rock, AR 72205, USAUniv Arkansas Med Sci, Food Safety Consortium Grp, Little Rock, AR 72205, USA TI - Treating apples with cetylpyridinium chloride to remove Escherichia coli O157 : H7 contamination: Effectivness and chemical residues MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000087246100223 SO - Abstracts of Papers of the American Chemical Society 2000 ;219():U64-U64 1698 UI - 12672 AU - Rodriguez-Vazquez K AU - Fleming PJ AD - Univ Nacl Autonoma Mexico, DISCA, IIMAS, Mexico City 01000, DF, MexicoUniv Sheffield, Dept Automat Control & Syst Engn, Sheffield S1 3JD, S Yorkshire, EnglandRodriguez-Vazquez, K, Univ Nacl Autonoma Mexico, DISCA, IIMAS, POB 20-726, Mexico City 01000, DF, Mexico TI - Use of genetic programming in the identification of rational model structures AB - This paper demonstrates how genetic programming can be used for solving problems in the field of non-linear system identification of rational models. By using a two-tree structure rather than introducing the division operator in the function set, this genetic programming approach is able to determine the "true" model structure of the system under investigation. However, unlike use of the polynomial, which is linear in the parameters, use of rational model is non-linear in the parameters and thus noise terms cannot be estimated properly. By means of a second optimisation process (real-coded GA) which has the aim of running the coefficients to the "true" values, these parameters are then correctly computed. This approach is based upon the well-known NARMAX model representation, widely used in non-linear system identification MH - United Kingdom MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000171563200013 L2 - ALGORITHM; SYSTEMS SO - Genetic Programming, Proceedings 2000 ;1802():181-192 1699 UI - 16493 AU - Rodriguez-Villafuerte M AU - Buenfil AE AU - Gamboa-deBuen I AU - Ruiz-Trejo C AU - Brandan ME AU - Yossian D AU - Satinger D AU - Horowitz YS AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBen Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelRodriguez-Villafuerte, M, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Study of the TL response of LiF : Mg,Ti to 3 and 7.5 MeV helium ions: Measurements and interpretation in terms of the track interaction model AB - We have measured the LiF:Mg,Ti (TLD-100) thermoluminescent response. efficiency and supralinearity, to 3 and 7.5 MeV helium ions in the fluence interval between 6 x 10(7) to 1.5 x 10(11) cm(-2). Ion irradiations were performed using a flux of elastically scattered ions from a thin gold target, The measured efficiencies with respect to Co-60 gamma-rays are equal to 0.074 and 0.174 at 3 and 7.5 MeV, respectively, for the response of peak 5. The supralinearity functions for peaks 4, 5, 6a, 6b, 7, 8, 9 and the total TL signal indicate that supralinearity is an increasing function of energy and that it increases with peak temperature. The data for peaks 5, 8 and 9 have been Successfully described by Monte Carlo simulations of the track interaction model. The fitted parameters show that peak 5 displays a special behaviour which requires the use of a much larger effective track radius than the higher temperature peaks, (C) 2000 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000085430200009 L2 - efficiency;supralinearity;sublinearity;TIM;HCP;TLD-100;THERMO-LUMINESCENCE; ALPHA-PARTICLES; SUPRALINEARITY; DOSIMETRY; TLD-100 SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2000 ;160(3):377-386 1700 UI - 14933 AU - Rodriguez-Villanueva V AU - Martinez-Lara R AU - az-Castaneda V AD - CICESE, Ensenada, Baja California, MexicoCity San Diego Ocean Monitoring Program, Marine Biol Lab, San Diego, CA 92106, USARodriguez-Villanueva, V, CICESE, Km 107 Highway Tijuana,Apartado Postal 2732, Ensenada, Baja California, Mexico TI - Structure and composition of the benthic polychaete families in Bahia de Todos Santos, Baja California, Mexico AB - Ln October 1994, 39 benthic samples were taken in Bahia de Todos Santos, Baja California, Mexico. Composition, structure, and distribution of polychaete families were analyzed encompassing almost the entire area of the bay. A total of 17,079 polychaetous annelids representing 45 families were identified, which constituted 61% of the total benthic macrofauna. Numerically dominant families were: Spionidae (1292 0.1 m(-2)), Capitellidae (685 0.1 m(-2)), Paraonidae (442 0.1 m(-2)), Cirratulidae (400 0.1 m(-2)), Maldanidae (331 0.1 m(-2)), Ampharetidae (298 0.1 m(-2)) and Nephtyidae (260 0.1 m(-2)). High values of diversity (H') and Stress-Predictability analysis indicated that 70% of the area of study was defined as a favorable and stable environment. Lower values of diversity for the remaining 30% of the bay coincided with areas affected by influxes of residual waters and dredging activity in the associated harbor. Jaccard's coefficient and Spearman's correlation coefficient similarly indicated high faunistic affinity between stations for 82% of the bay. Non-metric multidimensional scaling (MDS) together with Jaccard's and Spearman's coefficient analysis distinguished a submarine canyon area from the rest of the bay. Principal Components Analysis (PCA) applied to environmental parameters revealed the main influences driving polychaete faunal characteristics were depth, sediment grain size and organic matter content MH - Mexico|Baja California MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000165136800015 L2 - TAXONOMIC LEVELS; COMMUNITY; MARINE; MACROBENTHOS SO - Bulletin of Marine Science 2000 ;67(1):113-126 1701 UI - 15339 AU - Rodriguez AF AU - Vadera S AU - Sucar LE AD - Inst Invest Elect, Cuernavaca, Morelos, Mexico. Univ Salford, Sch Sci, Salford M5 4WT, Lancs, England. ITESM, Dept Computac, Cuernavaca 62020, Morelos, Mexico TI - A probabilistic exemplar-based model for case-based reasoning AB - An exemplar-based model with foundations in Bayesian networks is described. The proposed model utilises two Bayesian networks: one for indexing of categories, and another for identifying exemplars within categories. Learning is incrementally conducted Each time a new case is classified. The representation structure dynamically changes each time a new case is classified and a prototypicality function is used as a basis for selecting suitable exemplars. The results of evaluating the model on three datasets are presented MH - United Kingdom MH - Mexico|Morelos T3 - MICAI 2000: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBQ61W AV - English IS - 0302-9743 UR - ISI:000088970800004 SO - 2000 ;():40-51 1702 UI - 15193 AU - Rodriguez HG AU - Silva IC AU - Meza MVG AU - Jordan WR AD - Univ Autonoma Nuevo Leon, Fac Ciencias Forestales, Linares 67700, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Fac Econ, Monterrey, Nuevo Leon, MexicoTexas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843, USARodriguez, HG, Univ Autonoma Nuevo Leon, Fac Ciencias Forestales, Apartado Postal 41, Linares 67700, Nuevo Leon, Mexico TI - Seasonal plant water relationships in Acacia berlandieri AB - In order to assess how plant water potential is related to soil water availability and evaporative demand, determinations of diurnal and seasonal plant water potentials between 23 April 1997, and 22 September 1998, were studied in Acacia berlandieri Benth., a native shrub of the northeastern region of Mexico. Average plant water potentials during the wettest period ranged from -0.37 MPa (predawn, PD) to -2.79 MPa (midday, MD) whereas, during the long, hot, and severe drought period PD and MD water potentials measurements diminished down to -5.9 and -6.8 MPa, respectively. Average diurnal depression of plant water potential (calculated as the difference between midday and predawn water potentials) during the wettest and driest season varied from -2.28 +/-0.50 MPa to -0.86 +/- 0.46 MPa, respectively. An exponential function was found between PD water potential with average soil water content and vapor pressure deficit (VPD). Both variables supported about 85% and 66%, respectively, of the variability in PD water potential. PD water potential values were high and relatively constant above soil water content of 0.17 kg kg(-1); below this threshold value the PD water potential declined. Highest positive (r = 0.870) and negative (r = -0.706) correlation coefficients of PD water potential data were observed with soil moisture content at the 20-30 cm soil layer and VPD, respectively. MD water potential, VPD, and air temperature explained about 83% of the variation in PD water potential. Soil water content at the 20-30 cm soil layer, PD water potential, and relative humidity described about 82% of the variation in MD water potential. It was concluded A. berlandieri can endure substantial drydown periods and its water relations are strongly associated with soil water content and atmospheric evaporative demand components MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Soil Science U5 - J;Article AV - English IS - 0890-3069 UR - ISI:000089530400004 L2 - water stress;shrub;drought;soil water;water potential;pressure chamber;drydown;WALL ELASTICITY; GAS-EXCHANGE; SOIL; STRESS; SHRUBS; DESERT; RESPONSES; SEEDLINGS; GRASSES; DROUGHT SO - Arid Soil Research and Rehabilitation 2000 ;14(4):343-357 1703 UI - 16542 AU - Rodriguez LF AU - gado-Arellano VG AU - Gomez Y AU - Reipurth B AU - Torrelles JM AU - Noriega-Crespo A AU - Raga AC AU - Canto J AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USACSIC, IEEC, E-08034 Barcelona, SpainCALTECH, Ctr Infrared Proc & Anal, JPL, Pasadena, CA 91125, USARodriguez, LF, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - New VLA observations of the HH 1-2 region: Evidence for density enhancements moving along the axis of the VLA 1 radio jet AB - Using the Very Large Array, we have carried out new, sensitive radio continuum observations at 6 and 3.6 cm of the HH 1-2 region. The comparison between the 6 cm maps made from data taken in 1986.2 and 1992.9 indicates that VLA 1, the exciting source of the HH 1-2 flow, has suffered a morphological change that is attributed to the motion of a symmetric pair of knots along the axis of the radio jet. The proper motion of these knots, that are observed within 1 " from the embedded star, are consistent with the values found for optical and near-IR jets several arcseconds away. We tentatively propose that one of the knots observed in the 1986.2 radio data has emerged out of the heavily obscured region around VLA 1 as a near-infrared knot in the 1998.2 data of Reipurth and coworkers. This result supports the interpretation that the knots are formed by intrinsic processes in the acceleration and collimation of the flow or by shocks caused by a variable jet running into itself, and not by instabilities or sheer with the surrounding medium. The source VLA 3, associated with an H2O maser and powering a molecular outflow, also shows morphological changes that we attribute to the turn-on of a new, faint component. Our sensitive 3.6 cm map reveals the presence of a new source, VLA 4, that coincides positionally with the infrared source 3 of Reipurth and coworkers. Finally, we derive a proper motion for HH 1F that agrees closely with the optical values. In the case of HH 2 the complexity of the source hampers a detailed comparison with the optical proper motions MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000085275700035 L2 - ISM : individual (HH 1, HH 2);ISM : jets and outflows;stars : pre-main-sequence;HERBIG-HARO OBJECTS; EXCITING SOURCES; PROPER MOTIONS; CONTINUUM EMISSION; SPECTRAL INDEXES; HH-1-2 REGION; RESOLUTION; SYSTEM; SPECTROSCOPY; OUTFLOWS SO - Astronomical Journal 2000 ;119(2):882-889 1704 UI - 15944 AU - Rodriguez LL AU - Bunch TA AU - Fraire M AU - Llewellyn ZN AD - USDA ARS, Plum Isl Anim Dis Ctr, Greenport, NY 11944, USAExot Anim Dis Commiss, Mexico City, DF, MexicoColorado State Univ, Dept Environm Hlth, Ft Collins, CO 80523, USARodriguez, LL, USDA ARS, Plum Isl Anim Dis Ctr, POB 848, Greenport, NY 11944 USA TI - Re-emergence of vesicular stomatitis in the western United States is associated with distinct viral genetic lineages AB - Phylogenetic analysis of partial phosphoprotein and glycoprotein gene sequences showed that a single genetic lineage of vesicular stomatitis virus (VSV) serotype New Jersey (NJ) caused the 1995 and 1997 outbreaks of vesicular stomatitis (VS) in the western United States. While distinct from VSV-NJ strains causing previous outbreaks in the western United States and those circulating in feral swine in the southeastern United States, this lineage was closely related to viral lineages circulating in the Mexican states of Guerrero, Veracruz, and Oaxaca in 1996, 1989, and 1984 respectively. In 1997 and 1998, VSV serotype Indiana 1 (IN1) re-emerged in the western United States after 30 years. Viruses causing these outbreaks grouped within a single genetic lineage distinct from VSV-IN1 isolates causing outbreaks in the western United States in 1929 and 1956 but closely related to a strain circulating in the state of Colima in central Mexico in 1997. Our data showed that sporadic VS outbreaks in the western United States are caused by genetically distinct viral lineages closer to those circulating in enzootic areas of central and southern Mexico than to those causing previous outbreaks in the United States. The genetic evidence and temporal distribution of outbreaks are not consistent with a pattern of long-term maintenance of VSV in the western United States. (C) 2000 Academic Press MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 18 U4 - Virology U5 - J;Article AV - English IS - 0042-6822 UR - ISI:000087252300019 L2 - VIRUS NEW-JERSEY; FERAL SWINE; EVOLUTION; COLORADO; OUTBREAK; POPULATIONS SO - Virology 2000 ;271(1):171-181 1705 UI - 15935 AU - Rodriguez ME AU - Zelaya-Angel O AU - Bueno JJP AU - Jimenez-Sandoval S AU - Tirado L AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Unidad Queretaro, Queretaro 76040, Qro, MexicoCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoCINVESTAV, Lab Invest Mat, Unidad Queretaro, Mexico City 14000, DF, MexicoUniv Quindio, Lab Optoelect, Armenia, ColombiaRodriguez, ME, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Unidad Queretaro, Jose Siurob,10 Col Alamadas, Queretaro 76040, Qro, Mexico TI - Influence of Te inclusions and precipitates on the crystalline and thermal properties of CdTe single crystals AB - CdTe crystals grown by the Bridgman method were characterized by relating the Te excess to the bulk and their crystalline quality (CQ). The thermal diffusivity of these samples was measured using photoacoustic spectroscopy (PA). X-ray diffraction (XRD) data of the (1 1 1) peak of CdTe was employed to calculate the full-width at half-maximum (FWHM) and the lattice parameter. These results were used to compare CQ of different CdTe samples. The presence of Te inclusions and precipitates in the crystal was evident by XRD measurements and was confirmed using micro-Raman (mu R) spectroscopy. mu R microprobe scanning images were employed to determine the size, morphology, position and density of Te aggregates in the crystals. Photoluminescence (PL) measurements were carried out in order to assess the optical quality of the crystals and to relate these results to the XRD data. According to the experimental data, thermal diffusivity (alpha) is higher in samples with high crystalline quality and has strong dependence on the micro-structural composition of Te precipitates and inclusions. (C) 2000 Elsevier Science B.V. All rights reserved MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000087389800008 L2 - semiconductors;crystal growth;point defects;X-ray scattering;heat conduction;CD1-XZNXTE; ALLOYS; GROWTH SO - Journal of Crystal Growth 2000 ;213(3-4):259-266 1706 UI - 16297 AU - Rodriguez MH AU - Gonzalez-Ceron L AU - Hernandez JE AU - Nettel JA AU - Villarreal C AU - Kain KC AU - Wirtz RA AD - Inst Nacl Salud Publ, Ctr Invest Sobre Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoInst Nacl Salud Publ, Ctr Invest Paludismo, Cuernavaca 62508, Morelos, MexicoInst Nacl Salud Publ, Dept Informat, Cuernavaca 62508, Morelos, MexicoToronto Hosp, Trop Dis Unit, Toronto, ON M5G 2C4, CanadaUniv Toronto, Toronto, ON, CanadaCtr Dis Control & Prevent, Entomol Branch, Atlanta, GA 30341, USARodriguez, MH, Inst Nacl Salud Publ, Ctr Invest Sobre Enfermedades Infecciosas, Av Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Different prevalences of Plasmodium vivax phenotypes VK210 and VK247 associated with the distribution of Anopheles albimanus and Anopheles pseudopunctipennis in Mexico AB - The geographic distribution of Plasmodium vivax circumsporozoite protein phenotypes from patient blued used to infect colonized Anopheles albimanus and An. pseudopunctipennis was investigated in southern Mexico. Parasite phenotype types were determined in blood samples by a polymerase chain reaction and oligoprobe hybridization or by immunofluorescent assay of sporozoites. The proportion of infected mosquitoes and the number of oocysts per mosquito confirmed previous in vitro observations indicating that Ail. albimanus is more susceptible to VK210 and that An. pseudopunctipennis is more susceptible to VK247. All patients living on the coast were infected with VK210 and most patients living above 170 meters above sea level had VK247. Both phenotypes infected patients from intermediate altitudes. These results concur with the distribution of the anophelines, indicating that An. albimanus is the main vector of the phenotype VK210, but that Ail. pseudopunctipennis transmits both phenotypes. These conditions have direct implications on parasite transmission rates and malaria epidemiology in Mexico MH - Canada MH - Mexico|Morelos MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 16 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000086145500023 L2 - TAPACHULA FOOTHILLS AREA; HUMAN MALARIA PARASITES; CIRCUMSPOROZOITE PROTEIN; SOUTHERN MEXICO; MOSQUITO; VARIANT; REPEAT; MIDGUT; LOCALIZATION; POPULATIONS SO - American Journal of Tropical Medicine and Hygiene 2000 ;62(1):122-127 1707 UI - 15340 AU - Rodriguez PRD AU - Morales EF AU - Vadera S AD - Inst Invest Elect, Temixco 62490, Morelos, Mexico. ITESM, Temixco 62589, Morelos, Mexico. Univ Salford, Dept Math & Comp Sci, Salford M5 4WT, Lancs, England TI - RuLess: A method for the acquisition and simplification of rules AB - An algorithm developed to help an expert generate rules is presented. The algorithm, which has been called RuLess, consists of two main stages: (i) a session to incrementally capture the rules, and (ii) a mechanism to simplify the rules. In general, it can be used on environments where there is a finite set of possible examples which are not available in advance, and from which a set of classification rules needs to be produced. It is useful in domains in which all the attributes are discrete and the number of examples is not too large, as the user needs to manually classify ail the examples. RuLess was used to generate the tutoring rules of LacePro, a multifunctional system to learn, apply and consult established procedures. Based on the rules obtained for LacePro, the RuLess method was compared against the CN2 and nipple Down Rules methods, which are two well-known rule generation procedures MH - United Kingdom MH - Mexico|Morelos T3 - MICAI 2000: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBQ61W AV - English IS - 0302-9743 UR - ISI:000088970800025 SO - 2000 ;():272-283 1708 UI - 14677 AU - Rogers JD AU - San Martin F AU - Ju YM AU - Hansen K AD - Washington State Univ, Dept Plant Pathol, Pullman, WA 99164, USAInst Tecnol Ciudad Victoria, Cd Victoria 87010, Tamaulipas, MexicoAcad Sinica, Inst Bot, Taipei, TaiwanUniv Copenhagen, Inst Bot, Dept Mycol, DK-1353 Copenhagen, DenmarkRogers, JD, Washington State Univ, Dept Plant Pathol, Pullman, WA 99164 USA TI - Venezuelan fungi: Biscogniauxia viscosicentra sp nov and the anamorph of Camillea cyclops AB - Biscogniauxia viscosicentra, a fungus with ascospores bearing a cellular appendage and heretofore undescribed sticky hamathecial hyphae, herein called allophyses, is described as new. The Xylocladium anamorph of Camillea cyclops is described MH - Denmark MH - Mexico|Tamaulipas MH - Taiwan MH - USA PB - STUTTGART: GEBRUDER BORNTRAEGER RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0029-5035 UR - ISI:000165616900010 L2 - Biscogniauxia;Camillea;systematics;Xylariaceae;Xylocladium SO - Nova Hedwigia 2000 ;71(3-4):431-437 1709 UI - 15291 AU - Rojas-Avelizapa NG AU - Rodriguez-Vazquez R AU - Saval-Bohorquez S AU - Alvarez PJJ AD - Inst Politecn Nacl, CINVESTAV, Dept Biotecnol & Bioingn, Mexico City 07738, DF, MexicoUniv Nacl Autonoma Mexico, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Iowa, Dept Civil & Environm Engn, Iowa City, IA 52242, USARodriguez-Vazquez, R, Av IPN 2508,Col San Pedro Zacatenco, Mexico City, DF, Mexico TI - Effect of C/N/P ratio and nonionic surfactants on polychlorinated biphenyl biodegradation AB - This work investigated whether polychlorinated biphenyl (PCB) removal from a highly contaminated soil (7000-p.p.m.) could be enhanced by manipulating the carbon to nitrogen to phosphorus (C/N/P) ratio, and by nonionic surfactant addition. A Box-Behnken statistical experimental design was used to evaluate the combined effect of surfactant type, surfactant concentration, and C/N/P ratio in a relatively short treatment period (35 days). The variable with the greatest effect on PCB degradation was the type of surfactant used. Higher PCB removal efficiencies (39-60%) were obtained with Tween 80 (compared to Tergitol NP 10 and Triton X-100). This was attributed to its lower critical micelle concentration. Higher C/N/P ratios (increased by biphenyl addition) significantly stimulated the soil heterotrophic activity without enhancing PCB removal. This suggests that nonionic surfactants have a greater potential to enhance bioremediation of PCB-contaminated soil than efforts to enhance the soil heterotrophic activity through nutrient and analogue substrate addition MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000089132400001 L2 - Box-Behnken;carbon dioxide;contaminated soil;PCB;Tergitol;Triton;Tween;MICROBIAL SURFACTANTS; CONTAMINATED SOIL; MINERALIZATION; NUTRIENT; BIOAVAILABILITY; HYDROCARBONS; AQUIFERS SO - World Journal of Microbiology & Biotechnology 2000 ;16(4):319-324 1710 UI - 16622 AU - Rojas-Rodriguez J AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Enriquez-Coronel G AU - Colchero C AU - Cervera R AU - Font J AD - Specialties Hosp, Dept Rheumatol, Puebla, MexicoSpecialties Hosp, Dept Neurol, Puebla, MexicoSpecialties Hosp, Dept Nephrol, Puebla, MexicoManuel Avila Camacho Natl Med Ctr, Puebla, MexicoBenemetrita Univ, Sch Med, Dept Immunol, Puebla, MexicoUniv Barcelona, Sch Med, Hosp Clin, IDIBAPS,Dept Med,System Autoimmune Dis Unit, Barcelona, Catalonia, SpainGarcia-Carrasco, M, Hosp Clin, Unitat Malalties Autoimmunes Sistem, C Villarroel 170, Barcelona 08036, Catalonia, Spain TI - Catastrophic antiphospholipid syndrome: Clinical description and triggering factors in 8 patients AB - In 1992, an attempt to single out a different and important group of patients was adopted by introducing the term "catastrophic" antiphospholipid syndrome (APS) to describe their potentially life threatening clinical course, characterized by acute multiorgan failure (3 or more organ systems damaged), Patients previously described in the literature showed certain differences that appear to distinguish this minority group of patients with catastrophic APS from the majority of APS patients, We describe 8 patients with catastrophic APS, focusing especially on the possible extrinsic factors (mainly infections) that might trigger this "catastrophic" situation MH - Mexico|Puebla MH - Spain PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 23 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000084778000039 L2 - antiphospholipid syndrome;antiphospholipid antibodies;systemic lupus erythematosus;SYSTEMIC LUPUS-ERYTHEMATOSUS SO - Journal of Rheumatology 2000 ;27(1):238-240 1711 UI - 15012 AU - Rojas E AU - Valverde M AU - Kala SV AU - Kala G AU - Lieberman MW AD - Univ Nacl Autonoma Mexico, Dept Genet & Toxicol Ambiental, Inst Invest Biomed, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Pathol, Houston, TX 77030, USARojas, E, Univ Nacl Autonoma Mexico, Dept Genet & Toxicol Ambiental, Inst Invest Biomed, POB 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Accumulation of DNA damage in the organs of mice deficient in gamma-glutamyltranspeptidase (vol 447, pg 305, 2000) MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Correction AV - English IS - 0027-5107 UR - ISI:000090046000011 SO - Mutation Research-Fundamental and Molecular Mechanisms of Mutagenesis 2000 ;454(1-2):111-111 1712 UI - 16354 AU - Rojas E AU - Valverde M AU - Kala SV AU - Kala G AU - Lieberman MW AD - Univ Nacl Autonoma Mexico, Dept Genet & Toxicol Ambiental, Inst Invest Biomed, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Pathol, Houston, TX 77030, USARojas, E, Univ Nacl Autonoma Mexico, Dept Genet & Toxicol Ambiental, Inst Invest Biomed, POB 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Accumulation of DNA damage in the organs of mice deficient in gamma-glutamyltranspeptidase AB - We have used a differential alkaline single cell gel electrophoresis assay of DNA ("omet assay'' at pH 13 and 12.3) to evaluate DNA damage as a function of age in mice with an inherited defect in gluthathione (GSH) metabolism. The mice are homozygous null for gamma-glutamyltranspeptidase (GGT), the enzyme responsible for initiating the catabolism of GSH, and paradoxically have reduced levels of GSH and cysteine in many organs. We found an accumulation of DNA damage in lung, liver and kidney in these mice as a function of age. The largest differences were in assays run at pH 13, suggesting that the accumulation of apurinic/apryrimidinic (AP) sites and oxidative damage of DNA was largely responsible. In contrast, little if any accumulation of these lesions was detected in wild-type mice. Although these findings do not allow a precise analysis of the molecular basis of damage accumulation in GGT-deficient mice, they implicate low GSH and cysteine levels as a cause of accumulative DNA. damage in the intact mammal. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0027-5107 UR - ISI:000085852400018 L2 - gamma-glumyltranspeptidase;glutathlona single cell gel electrophoresis assay;oxidative stress;GLUTAMYL-TRANSPEPTIDASE; GLUTATHIONE METABOLISM; MAMMALIAN-CELLS; APOPTOSIS; REPAIR SO - Mutation Research-Fundamental and Molecular Mechanisms of Mutagenesis 2000 ;447(2):305-316 1713 UI - 16393 AU - Rojas F AU - Cota E AU - Ulloa SE AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USACota, E, UNAM, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - Dynamic behavior of asymmetric quantum dot cells AB - We study the dynamic evolution of 4- and 5-quantum dot cells in the presence of a time-dependent driver cell. We analyze the effects of imperfections, tunneling intensity and switching times on the response of the basic cell, for linear and periodic switching of the driver polarization. We find that the effects of the imperfections have strong consequences in slowing down the response of the basic cell and that the five-dot cell is less sensitive to these effects. Further studies show that a rapid deterioration of the response takes place as more cells are included. Effects of a time-dependent variation of the tunneling parameter as the switching takes place are also analyzed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000085770600101 L2 - quantum dots;quantum computation;COMPUTATION SO - Physica E-Low-Dimensional Systems & Nanostructures 2000 ;6(1-4):428-431 1714 UI - 15997 AU - Rojas P AU - Rojas-Castaneda J AU - Vigueras RM AU - Habeebu SSM AU - Rojas C AU - Rios C AU - Ebadi M AD - Inst Nacl Neurol & Neurocirugia, Lab Neurotoxicol, Mexico City 14269, DF, MexicoInst Nacl Pediat, Lab Histomorphol, Mexico City, DF, MexicoUniv Kansas, Med Ctr, Dept Pharmacol Toxicol & Therapeut, Kansas City, KS 66103, USAUniv N Dakota, Sch Med & Hlth Sci, Dept Pharmacol Physiol & Therapeut, Grand Forks, ND 58201, USARojas, P, Inst Nacl Neurol & Neurocirugia, Lab Neurotoxicol, Av Insurgentes Sur 3877, Mexico City 14269, DF, Mexico TI - MPTP decreases MT-I mRNA in mouse striatum AB - 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a drug that induces parkinsonism in humans and non-human primates. Free radicals are thought to be involved in its mechanism of action. Recently, metallothionein has been proposed to play a role as a scavenger of free radicals. In the present work, we studied the effect of MPTP neurotoxicity on brain metallothionein-I (MT-I) mRNA expression. Male C-57 black mice were treated with MPTP (30 mg/kg, i.p., daily) for 3 or 5 days. All animals were killed by cervical dislocation 7 days after the last MPTP dose. The brains were removed quickly and immediately frozen, and quantitative in situ hybridization was performed using MT-I cDNA probe. MT-I mRNA content in striatum, a region which is known to be highly predisposed and sensitive to MPTP-induced oxidative stress, decreased by 30% (3 days) and 39% (5 days) respectively, after the last MPTP administration. These results suggest that MT-I gene expression is decreased in MPTP neurotoxicity. it is suggested that the reduction of MT, an anti-oxidant and a free radical scavenger, in the striatum by MPTP enables the neurotoxin to exert maximal oxidative damage to the striatum MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0364-3190 UR - ISI:000086991500010 L2 - MPTP;Parkinson's disease;metallothionein-I;MT-I mRNA;striatum;oxidative stress;BRAIN METALLOTHIONEIN; LIPID-PEROXIDATION; OXIDATIVE STRESS; MESSENGER-RNA; FREE-RADICALS; MICE; 1-METHYL-4-PHENYL-1,2,3,6-TETRAHYDROPYRIDINE; ZINC; NEUROTOXICITY; MECHANISMS SO - Neurochemical Research 2000 ;25(4):503-509 1715 UI - 16689 AU - Rojas P AU - Hidalgo J AU - Ebadi M AU - Rios C AD - Inst Nacl Neurol & Neurocirugia, Lab Neurotoxicol, Mexico City, DF, MexicoUniv Autonoma Barcelona, Fac Ciencias, Dept Biol Celular & Fisiol, Unidad Fisiol Anim, E-08193 Barcelona, SpainUniv Nebraska, Med Ctr, Dept Pharmacol, Lincoln, NE 68583, USAInst Nacl Neurol & Neurocirugia, Dept Neuroquim, Mexico City, DF, MexicoRojas, P, Inst Nacl Neurol & Neurocirugia, Lab Neurotoxicol, Av Insurgentes Sur 3877 Col Fama,CP 14269, Mexico City, DF, Mexico TI - Changes of metallothionein I+II proteins in the brain after 1-methyl-4-phenylpyridinium administration in mice AB - 1. 1-methyl-4-phenylpyridinium (MPP+) is a drug that induces a Parkinson's-like syndrome in several species. Oxidative stress resulting from either excess generation or reduced scavenging of free radicals has been proposed to play a role in its neurotoxicity. 2. It has been suggested that metallothionein (MT) protects against oxidative damage of the central nervous system produced by overproduction of free radicals. 3. This study examined the effect of MPP+ on metallothionein I+II protein content in different brain regions. 4. NIH mice were injected with MPP+ (4.5, 9.0 or 18 mu g/ 3 mu l) into their right lateral ventricle. 5. Corpus striatum, cerebellum, midbrain, frontal cortex and hippocampus were dissected out and their metallothionein concentrations were analyzed by radioimmunoassay. 6. MPP+ reduced the concentration of MT I+II proteins (38%) only in the striatum. 7. The results suggest that changes in MT I+II content may be associated with MPP+ neurotoxicity MH - Mexico|Distrito Federal MH - Spain MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Clinical Neurology;Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Review AV - English IS - 0278-5846 UR - ISI:000084226600012 L2 - free radicals;MPP;metallothionein;oxidative stress;Parkinson's disease;LIPID-PEROXIDATION; OXIDATIVE STRESS; MPTP TREATMENT; MOUSE-BRAIN; 1-METHYL-4-PHENYL-1,2,3,6-TETRAHYDROPYRIDINE NEUROTOXICITY; PARKINSONS-DISEASE; MONOAMINE-OXIDASE; HYDROXYL RADICALS; RAT-BRAIN; ZINC SO - Progress in Neuro-Psychopharmacology & Biological Psychiatry 2000 ;24(1):143-154 1716 UI - 16216 AU - Rojo-Leyva F AU - Ratliff NB AU - Cosgrove DM AU - Hoffman GS AD - Cleveland Clin Fdn, Cleveland, OH 44195, USACent Mil Hosp, Mexico City, DF, MexicoHoffman, GS, Cleveland Clin Fdn, 9500 Euclid Ave, Cleveland, OH 44195 USA TI - Study of 52 patients with idiopathic aortitis from a cohort of 1,204 surgical cases AB - Objective. To determine 1) the frequency of idiopathic aortitis in a large surgical cohort, 2) how often aortitis was associated with a systemic disease, and 3) whether the findings of aortitis in resected specimens predicted future occurrences of clinically apparent vascular injury due to vasculitis. Methods. Retrospective chart and pathology review of 1,204 aortic surgical specimens that were gathered over a period of 20 years at a tertiary care medical center. A standardized database was used to compare features of aortitis patients with those of controls in whom inflammation was not present. Results. Among 1,204 aortic specimens, 52 (4.3%) were clinically and pathologically classified as idiopathic aortitis. Sixty-seven percent of patients with idiopathic aortitis were women. In 96% of idiopathic aortitis patients with aneurysm formation, aortitis was present only in the thoracic aorta. Among 383 thoracic aortic aneurysms, 12% had idiopathic inflammatory features. In 96% of patients with idiopathic aortitis, symptoms of systemic illness had not been present at the time of surgery, In 31%, aortitis was associated with a remote history of vasculitis and a variety of other systemic disorders. During a mean followup period of 41.2 months, new aneurysms were identified among 6 of 25 patients who were not treated with glucocorticoids, None were identified among 11 patients who were treated with glucocorticoids (mean followup 35.5 months). Conclusion. The frequency of idiopathic aortitis in a large surgical cohort was found to be 4.3%. Thoracic aorta aneurysm formation, in the absence of systemic illness, was the most common manifestation. In the setting of a cardiovascular surgery practice, aortitis may first become apparent only after pathologic evaluation of excised specimens. The appropriate medical treatment for patients with incidentally discovered aortitis is not known. Because 17% of our patients subsequently developed new aneurysms, we suggest that it would be prudent for patients with idiopathic aortitis identified at the time of surgery to be periodically evaluated for recurrent or persistent disease MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 34 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000086398000023 L2 - GIANT-CELL ARTERITIS; ANKYLOSING-SPONDYLITIS; TAKAYASUS-ARTERITIS; ANEURYSM; REGURGITATION; DISSECTION; DISEASE; CLASSIFICATION; ASSOCIATION SO - Arthritis and Rheumatism 2000 ;43(4):901-907 1717 UI - 16252 AU - Romach EH AU - Zhao CQ AU - Del Razo LM AU - Cebrian ME AU - Waalkes MP AD - NIEHS, Inorgan Carcinogensis Sect, Comparat Carcinogenesis Lab, NCI, Res Triangle Pk, NC 27709, USAIPN, CINVESTAV, Mexico City 07738, DF, MexicoWaalkes, MP, NIEHS, Inorgan Carcinogensis Sect, Comparat Carcinogenesis Lab, NCI, Mail Drop F0-09,111 Alexander Dr, Res Triangle Pk, NC 27709 USA TI - Studies on the mechanisms of arsenic-induced self tolerance developed in liver epithelial cells through continuous low-level arsenite exposure AB - Arsenic (As) is a human carcinogen. Our prior work showed that chronic (>18 weeks) tow level (500 nM) arsenite (As3+) exposure induced malignant transformation in a rat liver epithelial cell line (TRL 1215). In these cells, metallothionein (MT) is hyper-expressible, a trait often linked to metal tolerance. Thus, this study examined whether the adverse effects of arsenicals and other metals were altered in these chronic arsenite-exposed (CAsE) cells. CAsE cells, which had been continuously exposed to 500 nM arsenite for 18 to 20 weeks, and control cells, were exposed to As3+, arsenate (As5+), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), antimony (Sb3+), cadmium (Cd2+), cisplatin (cis-Pt), and nickel (Ni2+) for 24 h and cell viability was determined by metabolic integrity. The lethal concentration for 50% of exposed cells (LC50) for As3+ nas 140 mu M in CAsE cells as compared to 26 mu M in control cells, a 5.4-fold increase in tolerance. CAsE cells were also very tolerant to the acute toxic effects of As5+ (LC50 4000 mu M) compared to control (LC50 180 mu M. The LC50 for DMA was 4.4-fold higher in CAsE cells than in control cells, but the LC50 for MMA was unchanged. There was a modest cross-tolerance to Sb3+, Cd2+, and cis-Pt in CAsE cells (LC50 1.5-3.0-fold higher) as compared to control. CASE cells were very tolerant to Ni2+ (LC50 > 8-fold higher). Culturing CAsE cells in As3+-free medium for 5 weeks did not alter As3+ tolerance, implicating an irreversible phenotypic change. Cellular accumulation of As was 87% less in CAsE cells than control and the accumulated As was mo, readily eliminated. Although accumulating much less As, a greater portion was converted to DMA in CAsE cells. Altered glutathione (GSH) Levels were not Linked with As tolerance. A maximal induction of MT by Zn produced only a 2.5-fold increase in tolerance to As3+ in control cells. Cell lines derived from MT normal mice (MT+/+) were only slightly more resistant (1.6-fold) to As3+ than cells from MT null mice (MT-/-). These results show that CAsE cells acquire tolerance to As3+, As5+, and DMA. It appears that this self-tolerance is based primarily on reduced cellular disposition of the metalloid and is not accounted for by changes in GSH or MT MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 47 U4 - Toxicology U5 - J;Article AV - English IS - 1096-6080 UR - ISI:000086224300026 L2 - arsenic;zinc;tolerance;metallothionein;cytotoxicity;HAMSTER OVARY CELLS; HEPATIC METALLOTHIONEIN; DIMETHYLARSINIC ACID; REDUCED GLUTATHIONE; OXIDATIVE DAMAGE; ESCHERICHIA-COLI; RESISTANCE; TISSUES; MICE; EXPRESSION SO - Toxicological Sciences 2000 ;54(2):500-508 1718 UI - 15733 AU - Romaguera J AU - Moran C AU - az-Montes TP AU - Hines GA AU - Cruz RI AU - Azziz R AD - Univ Alabama, Dept Obstet & Gynecol, Birmingham, AL 35249, USAUniv Alabama, Dept Med, Birmingham, AL 35249, USAUniv Puerto Rico, Sch Med, Dept Obstet & Gynecol, San Juan, PR 00936, USAInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoAzziz, R, Univ Alabama, Dept Obstet & Gynecol, 618 S 20th St,OHB 549, Birmingham, AL 35249 USA TI - Prevalence of 21-hydroxylase-deficient nonclassic adrenal hyperplasia and insulin resistance among hirsute women from Puerto Rico AB - Objective: To determine the prevalence of 21-hydroxylase (21-OH)-deficient nonclassic adrenal hyperplasia (NCAH) and insulin resistance in hirsute women from Puerto Rico. Design: Cross-sectional prospective study. Setting: Clinical research center. Patient(s): 100 consecutive untreated hirsute women. Main Outcome Measure(s): Fasting total T, free T, DHEAS, insulin, and glucose were measured, and a 60-minute acute ACTH-(1-24) stimulation for 17-hydroxyprogesterone (17-HP) was performed. A diagnosis of 21-OH-deficient NCAH was considered when the stimulate 17-HP level was >30.3 nmol/L. The glucose/insulin ratio was calculated as a measure of insulin resistance (normal value, greater than or equal to 4.5). Result(s): Patients had a mean (+/-SD) age of 26.8 +/- 6.6 years; 82 were oligomenorrheic. Overall, 12%, 8% and 60% of patients had elevated levels of DHEAS, total T, or free T, respectively. One patient was identified as having 21-OH-deficient NCAH. Eight women, none of whom had NCAH, were found to be hyperglycemic; four of these women had type 2 diabetes mellitus. Excluding hyperglycemic patients, a glucose/insulin ratio of <4.5, consistent with IR, was found in 51.7%. Conclusion(s): The prevalence of 21-OH-deficient NCAH among patients from Puerto Rico does not differ significantly from that reported for other non-Jewish, non-Hispanic white populations. (Fertil Steril(R) 2000;74:59-62. (C) 2000 by American Society for Reproductive Medicine) MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000087975200010 L2 - androgens;hirsutism;polycystic ovary syndrome;hyperandrogenism;adrenal hyperplasia;insulin resistance;POLYCYSTIC-OVARY-SYNDROME; IMPAIRED GLUCOSE-TOLERANCE; DIABETES-MELLITUS; EUMENORRHEIC WOMEN; DEFICIENCY; OBESITY; HYPERANDROGENISM; DIAGNOSIS; CLASSIFICATION; STIMULATION SO - Fertility and Sterility 2000 ;74(1):59-62 1719 UI - 16244 AU - Roman G AU - Sotelo J AU - Del Brutto O AU - Flisser A AU - Dumas M AU - Wadia N AU - Botero D AU - Cruz M AU - Garcia H AU - de Bittencourt PRM AU - Trelles L AU - Arriagada C AU - Lorenzana P AU - Nash TE AU - Spina-Franca A AD - Univ Texas, World Federat Neurol Res Grp Trop Neurol, San Antonio, TX 78246, USAInst Nacl neurol & Neurocirugia, Mexico City, DF, MexicoHosp Luis Vernaza, Guayaquil, EcuadorUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoInst Nacl Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoUniv Limoges, Fac Med, Inst Epidemiol Neurol & Neurol Trop, Limoges, FranceJaslok Hosp, Bombay, Maharashtra, IndiaInst Colombiano Med Trop, Medellin, ColombiaUniv Cent & Acad Eucatoriana Neurociencias, Quito, EcuadorRoman, G, Univ Texas, World Federat Neurol Res Grp Trop Neurol, POB 460746, San Antonio, TX 78246 USA TI - A proposal to declare neurocysticercosis an international reportable disease AB - Neurocysticercosis is an infection of the nervous system caused by Taenia solium. It is the most important human parasitic neurological disease and a common cause of epilepsy in Africa, Asia, and Latin America, representing enormous costs for anticonvulsants, medical resources and lost production. Neurocysticercosis is a human-to-human infection, acquired by the faecal-enteric route from carriers of intestinal T. solium, most often in areas with deficient sanitation. Intestinal tapeworms cause few symptoms, but adult taeniae carried by humans release large numbers of infective eggs and are extremely contagious. Ingestion of poorly cooked pig meat infested with T. solium larvae results in intestinal taeniosis but not neurocysticercosis. With a view to hastening the control of taeniosis and neurocysticercosis we propose that neurocysticercosis be declared an international reportable disease. New cases of neurocysticercosis should be reported by physicians or hospital administrators to their health ministries. An epidemiological intervention could then be launched to interrupt the chain of transmission by: (1) searching for, treating and reporting the sources of contagion, i.e. human carriers of tapeworms; (2) identifying and treating other exposed contacts; (3) providing health education on parasite transmission and improvement of hygiene and sanitary conditions; and (4) enforcing meat inspection policies and limiting the animal reservoir by treatment of pigs. We believe that the first step required to solve the problem of neurocysticercosis is to implement appropriate surveillance mechanisms under the responsibility of ministries of health. Compulsory notification also has the major advantage of providing accurate quantification of the incidence and prevalence of neurocysticercosis at regional level, thus permitting the rational use of resources in eradication campaigns MH - Colombia MH - Ecuador MH - France MH - India MH - Mexico|Distrito Federal MH - USA PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 69 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000086348000019 L2 - epidemiological surveillance;international cooperation;neurocysticercosis, epidemiology;LOS-ANGELES COUNTY; TAENIA-SOLIUM; CEREBRAL CYSTICERCOSIS; PORCINE CYSTICERCOSIS; EPILEPSY; IMMUNIZATION; MEXICO; PIGS; EPIDEMIOLOGY; PREVALENCE SO - Bulletin of the World Health Organization 2000 ;78(3):399-406 1720 UI - 14854 AU - Romero LI AU - Zhang DN AU - Cooke JP AU - Ho HKV AU - Avalos E AU - Herrera R AU - Herron GS AD - Stanford Univ, Sch Med, Dept Dermatol, Stanford, CA 94305, USACtr Biol Expt, Guadalupe 98600, Zacatecas, MexicoHerron, GS, Mol Med Res Inst, 325 E Middlesfield Rd, Mt View, CA 94043 USA TI - Differential expression of nitric oxide by dermal microvascular endothelial cells from patients with scleroderma AB - Vascular abnormalities in scleroderma are fundamental to the pathogenesis of this disease. The objective of this study was to characterize dermal microvascular endothelial cells (DMEC) isolated from scleroderma patients with respect to growth and expression of the constitutive form of endothelial nitric oxide synthase (eNOS). DMEC from patients with both systemic sclerosis (SSc) and localized scleroderma (Loc Scl) contained small intact microvascular structures in contrast to single cell isolations obtained from control skin. Immunoaffinity selection on anti-PECAM-1 beads yielded pure populations of DMEC expressing normal markers. While the morphology and initial growth of SSc DMEC closely paralleled control cells, the growth of SSc DMEC decreased with time in culture (doubling time of 3 days vs. 5 days). Expression of ecNOS mRNA was reduced in; both Loc Sd and SSc as shown by semi-quantitative RT-PCR (p < 0.001). Western blots showed variable but generally lower ecNOS protein levels and decreased levels of nitrogen oxides in media were found from both SSc and Loc Sd relative to control cells. The results indicate an intrinsic defect in the mechanism of nitric oxide production in DMEC isolated from scleroderma patients and suggest its possible involvement in the pathophysiology of scleroderma MH - Mexico|Zacatecas MH - USA PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 19 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 1358-863X UR - ISI:000165361400004 L2 - constitutive endothelial-type nitric oxide synthase;human dermal microvascular endothelial cells;localized scleroderma;systemic scleroderma;PRIMARY RAYNAUDS-PHENOMENON; SYSTEMIC-SCLEROSIS; L-ARGININE; HUMAN SKIN; TISSUE INHIBITOR; SYNTHASE GENE; EXTRACELLULAR-MATRIX; MOLECULAR-CLONING; MESSENGER-RNA; GROWTH-FACTOR SO - Vascular Medicine 2000 ;5(3):147-158 1721 UI - 16630 AU - Romero N AU - Silverberg N AU - Roy S AU - Lovejoy C AD - IPN, CICIMAR, La Paz 23096, BCS, MexicoUniv Quebec, Dept Oceanog, Rimouski, PQ G5L 3A1, CanadaFisheries & Oceans Canada, Maurice Lamontagne Inst, Mt Joli, PQ G5H 3Z4, CanadaInst Natl Rech Sci Oceanol, Rimouski, PQ G5L 3A1, CanadaUniv Laval, Dept Biol, GIROQ, Quebec City, PQ G1K 7P4, CanadaRomero, N, IPN, CICIMAR, Av Inst Politecn Nacl S-N,Playa Palo Santa Rita, La Paz 23096, BCS, Mexico TI - Sediment trap observations from the Gulf of St. Lawrence and the continental margin of eastern Canada AB - Sediment trap samples have provided the first direct observations of the sinking particles that account for the export of material out of the photic zone in the Gulf of St. Lawrence, as well as their relationship to variations in the trophic regime. Particles were collected at several sites over 24-h periods using 0.03 m(2) (collecting surface) and 0.5 m(2) free-drifting sediment traps at 50 and 150 m. Total mass flux varied widely (80-1500 mg/m(2)/d), as did carbon flux (16-300 mg C/m(2)/d). Small cylinders consistently oversampled with respect to big cylinders, regardless of depth or drifter design. Also, 6-month time series were obtained with a moored, 0.125 m(2) trap at two sites. In the Anticosti Gyre, time-series fluxes were consistent with those obtained from the big drifting trap (means: 480 mg dry wt/m(2)/d; 39 mg C/m(2)/d), and with independently measured sediment accumulation rates. Numeric fluxes of phytoplankton cells were similar to moderately productive ocean margins during the April 1994 bloom, but otherwise resembled those from oligotrophic regimes. Fecal pellet numeric fluxes, in contrast, were always high, similar to other continental margins. The composition of the material collected by the small and big traps is a good indicator of the changing trophic regime in the water column, Relative numeric abundances suggest three distinctly different periods. A "bloom" period (represented by April 1994, but including a weaker late-fall bloom over a shelf valley), when a variety of centric and pennate diatom cells made up 70-95% of the particle numbers; a transitional or "post-bloom" period (June 1994), when phytoplankton were less abundant, pennate forms were scarce and a single species dominated the centric diatoms; and a "non-bloom" period (May to December, 1993) when fecal pellets and microzooplankton accounted for greater numbers than the phytoplankton cells, including abundant dinoflagellates, The time-series Anticosti Gyre trap showed continued large-particle settling throughout the winter with total mass and carbon fluxes similar to the ice-free seasons. The most frequent fecal pellets were 50-109 mu m diameter compact and loose rods, produced by the dominant calanoid copepods. Large macrozooplankton fecal pellets occurred only sporadically. Many pellets < 49 mu m were collected in December 1993, probably produced by Microcalanus, which was unusually abundant at this time. Oval pellets occurred over a broad range of diameters, suggesting multiple origins. The bulk of the settling material produced by the pelagic food web in the Gulf appears to be of zooplanktonic origin (mainly fecal pellets and abundant microzooplankton). Diatom frustules were the most frequently encountered particles, numerically, but phytoplankton rarely made up more than 35% of the 2D projected area of all particles. Much of the organic matter produced photosynthetically must thus be transformed by heterotrophs before escaping from the surface and intermediate waters in this region. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000084933000008 L2 - BIOGENIC CARBON; FECAL PELLETS; LAURENTIAN TROUGH; PARTICULATE FLUX; DIATOM BLOOMS; PARTICLE-FLUX; VERTICAL FLUX; SARGASSO SEA; MARINE SNOW; DEEP OCEAN SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2000 ;47(3-4):545-583 1722 UI - 15427 AU - Romieu I AU - Hernandez-Avila M AU - Lazcano-Ponce E AU - Weber JP AU - Dewailly E AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoPan Amer Hlth Org, Mexico City, DF, MexicoCtr Toxicol Quebec, Quebec City, PQ, CanadaCtr Sante Publ Quebec, Serv Sante & Environm, Quebec City, PQ, CanadaRomieu, I, Inst Nacl Salud Publ, Av Univ 655,Col Santa Maria Ahucatitlan, Cuernavaca 62508, Morelos, Mexico TI - Breast cancer, lactation history, and serum organochlorines AB - The authors analyzed the relation between lactation history, organochlorine serum levels-in particular, 2,2-bis(p-chlorophenyl)-1,1,1-trichloroethane (DDT) and 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE)-and the risk of breast cancer within a subsample from a larger breast cancer case-control study conducted among women living in Mexico City, Mexico, between 1990 and 1995. From the original study, they selected a random sample of 260 subjects (1:1 case/control ratio). Analysis was restricted to 120 cases and 126 controls who had given birth to at least one child and had complete information on all key variables. Serum DDE levels were higher among cases (mean = 3.84 mu g/g lipids, standard deviation = 5.98) than among controls (mean = 2.51 mu g/g lipids, standard deviation = 1.97). After adjustment for age, age at menarche, duration of lactation, Quetelet index, and serum DDT levels, serum DDE levels were positively related to the risk of breast cancer (adjusted odds ratio (OR)(Q1-Q2) = 1.24, 95% confidence interval (CI): 0.50, 3.06; ORQ1-Q3 = 2.31, 95% CI: 0.92, 5.86; ORQ1-Q4 = 3.81, 95% CI: 1.14, 12.80; test of trend, p = 0.02). The increased risk associated with higher serum DDE levels was more apparent among postmenopausal women (ORQ1-Q4 = 5.26, 95% CI: 0.80, 34.30; test of trend p = 0.03). A longer period of lactation was associated with a slightly decreased risk of breast cancer independently of serum DDE levels (OR = 0.91, 95% CI: 0.85, 0.99 change in risk per 10 months of lactation). Serum DDT level was not related to the risk of breast cancer. The data suggest that high levels of exposure to DDE may increase women's risk of breast cancer, particularly among postmenopausal women MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 66 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000088829700008 L2 - breast neoplasms;DDE;lactation;polychlorinated biphenyls;POLYCHLORINATED-BIPHENYLS; CHLORINATED HYDROCARBONS; POSTMENOPAUSAL WOMEN; ADIPOSE-TISSUE; PUBLIC-HEALTH; BLOOD-LEVELS; RISK; DDT; ESTROGEN; MEXICO SO - American Journal of Epidemiology 2000 ;152(4):363-370 1723 UI - 15522 AU - Roncagliolo M AU - Benitez J AU - Eguibar JR AD - Univ Valparaiso, Fac Ciencias, Dept Fisiol, Inst Ciencias Biol & Quim, Valparaiso, ChileBenemerita Univ Autonoma Puebla, Inst Fisiol, Puebla, MexicoRoncagliolo, M, Univ Valparaiso, Fac Ciencias, Dept Fisiol, Inst Ciencias Biol & Quim, Av Gran Bretana 1111,Casilla 5030, Valparaiso, Chile TI - Progressive deterioration of central components of auditory brainstem responses during postnatal development of the myelin mutant taiep rat AB - Auditory brainstem responses (ABRs) were evaluated during the postnatal development (P10-P180) of taiep rats, neurological mutants characterized by early abnormal myelin development and subsequent demyelination of the CNS, The disorder is produced by an autosomal recessive mutation trait that affects the oligodendrocytes but not the Schwann cells. After onset of ABRs (P12-P14), taiep rats and their nonaffected heterozygous littermates that served as controls showed a similar pattern of maturation for wave 1. The central waves (In-IV) showed significantly longer latencies in the mutants. By P60-P180, the later waves (III and IV) were frequently difficult to discern. From the onset of ABRs, the interpeak latency I-IV, corresponding to the central conduction time (CCT) of the auditory pathway, showed in taiep rats significantly longer values than controls. After an initial reduction, proportional to that of control rats, the CCT value increased progressively during the second month of the mutants' lives. The electrophysiological results of the present study strongly support the hypothesis that mutation in the taiep rat impairs neuromaturation of the central auditory pathway in the brainstem by affecting the myelination process in the CNS. Copyright (C) 2000 S. Karger AG. Basel MH - Chile MH - Mexico|Puebla PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences;Otorhinolaryngology U5 - J;Article AV - English IS - 1420-3030 UR - ISI:000088637400003 L2 - auditory brainstem response (ABR);evoked potentials;central conduction time;postnatal development;myelin mutant;taiep rat;EVOKED-POTENTIALS; STEM RESPONSES; IMMOBILITY EPISODES; WAVE-II; INFANTS; MATURATION; ORIGIN; ABNORMALITIES; ADULTHOOD; CHILDREN SO - Audiology and Neuro-Otology 2000 ;5(5):267-275 1724 UI - 16229 AU - Roncagliolo M AU - Leon C AU - Silva J AU - Eguibar JR AD - Univ Valparaiso, Fac Ciencias, Dept Fisiol, Valparaiso, ChileB Univ Autonoma Puebla, Inst Ciencias Fisiol, Puebla, Mexico TI - The recovery cycle of excitability in isolated optic nerve of myelin mutant taiep rats during postnatal development MH - Chile MH - Mexico|Puebla PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Physiology U5 - J;Meeting Abstract AV - English IS - 0022-3751 UR - ISI:000085937100081 SO - Journal of Physiology-London 2000 ;523():54P-54P 1725 UI - 12474 AU - Rook G AU - Baker R AU - Walker B AU - Honour J AU - Jessop D AU - Hernandez-Pando R AU - Arriaga K AU - Shaw R AU - Zumla A AU - Lightman S AD - Royal Free & Univ Coll Med Sch, London, EnglandUniv Edinburgh, Western Gen Hosp, Dept Med, Edinburgh EH4 2XU, Midlothian, ScotlandUniv Bristol, Bristol Royal Infirm, Dept Med, Bristol BS2 8HW, Avon, EnglandInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHammersmith Hosp, London, EnglandRook, G, UCL Med Sch, Windeyer Inst Med Sci, 46 Cleveland St, London W1P 6DB, England TI - Local regulation of glucocorticoid activity in sites of inflammation - Insights from the study of tuberculosis AB - In sites of inflammation there is a change in the equilibrium between the enzymes that inactivate cortisol by conversion to cortisone and those that reactivate cortisone by conversion to cortisol. Current evidence suggests that during an immune response with a Type 1 cytokine profile such as tuberculosis, there is locally enhanced reductase activity with locally increased cortisol concentrations due to recruitment of cortisone. This results in enhanced cortisol mediated feedback on the inflammatory process, and deviation of the response towards Type 2. Preliminary data suggest that eventually, in the presence of Type 2 cytokine polarization, the enzyme equilibrium may reverse again and cortisol is then locally inactivated to cortisone. Together with changes in glucocorticoid receptor expression and function this may result in local cortisol resistance and susceptibility to tissue damage mediated by proinflammatory cytokines. These observations help to explain the sequence of events in several infectious, inflammatory and autoimmune diseases MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 14 U4 - Multidisciplinary Sciences U5 - S;Article AV - English IS - 0077-8923 UR - ISI:000171939400091 L2 - RECEPTOR-BINDING AFFINITY; NECROSIS-FACTOR-ALPHA; 11-BETA-HYDROXYSTEROID DEHYDROGENASE; IN-VIVO; CELLS; EXPRESSION; SYSTEM; MODEL; RATS; HYPERTENSION SO - Neuroimmunomodulation 2000 ;917():913-922 1726 UI - 16068 AU - Rosales-Jasso A AU - Arias G AU - Rodriguez OS AU - Allen NS AD - Manchester Metropolitan Univ, Dept Chem & Mat, Manchester M1 5GD, Lancs, EnglandCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoAllen, NS, Manchester Metropolitan Univ, Dept Chem & Mat, Chester St, Manchester M1 5GD, Lancs, England TI - Viscosity changes associated with the chemically induced crosslinking of plasticized poly(vinyl chloride) measured by parallel plate and torque rheometry: influence of magnesium and barium mercaptides AB - The chemical crosslinking of poly(vinyl chloride) (PVC) induced by metallic mercaptides (Ba and Mg salts of 2-dibutylamino- 4,6-dithio-1,3,5-triazine) combined with various thermal stabiliser combinations (calcium/zine and barium/zinc stearates) has been examined by parallel plate and torque rheometry and gel formation. The extent of crosslinking was determined by measuring the solvent (tetrahydrofuran) insoluble gel content. The crosslinking reaction as measured by torque and parallel plate rheometry, showed that the magnesium salt of the 2-dibutylamino-4,6-dithio-1,3,5-triazine was more effective than the barium salt in crosslinking the PVC. In combination with metal stearates, the Ca/Zn stearates give shorter induction times than their Ba/Zn analogues, i.e the Ca/Zn stabilisers are less effective in inhibiting crosslinking. The data are discussed with a view to the development of appropriate stabiliser/sensitiser packages for PVC with a window that allows effective process stabilisation coupled with post-crosslinking. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Coahuila PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 0141-3910 UR - ISI:000086807200013 L2 - CROSS SO - Polymer Degradation and Stability 2000 ;68(2):253-259 1727 UI - 15853 AU - Rosano A AU - Botto LD AU - Olney RS AU - Khoury MJ AU - Ritvanen A AU - Goujard J AU - Stoll C AU - Cocchi G AU - Merlob P AU - Mutchinick O AU - Cornel MC AU - Castilla EE AU - Martinez-Frias ML AU - Zampino G AU - Erickson JD AU - Mastroiacovo P AD - Int Ctr Birth Defects, I-00195 Rome, ItalyCtr Dis Control & Prevent, Dept Birth Defects & Pediat Genet, Atlanta, GA, USANatl Res & Dev Ctr Welf & Hlth Stakes, Registry Congenital Malformat, Helsinki, FinlandINSERM U149, France Paris Birth Defects Monitoring Program, Paris, FranceHop Hautepierre, Serv Genet Med, Strasbourg, FranceUniv Bologna, Ist Clin Pediat Prevent & Neonatol, Bologna, ItalyRabin Med Ctr, Dept Neonatol, Petah Tiqwa, IsraelInst Nacl Nutr Salvador Zubiran, Dept Genet, Mexico City 14000, DF, MexicoUniv Groningen, Dept Med Genet, Groningen, NetherlandsFIOCRUZ, ECLAMC, Estudio Colaborativo Latinoamericano Malformacion, BR-21045900 Rio De Janeiro, BrazilCONICET, RA-1033 Buenos Aires, DF, ArgentinaUniv Complutense, Fac Med, ECEMC, Estudio Colaborativo Espanol Malformaciones Cogen, E-28040 Madrid, SpainIPIMC, Rome, ItalyUniv Cattolica Sacro Cuore, Inst Pediat, Birth Defects Unit, I-20123 Milan, ItalyMastroiacovo, P, Int Ctr Birth Defects, Via Pilo Albertelli 9, I-00195 Rome, Italy TI - Limb defects associated with major congenital anomalies: Clinical and epidemiological study from the international clearinghouse for birth defects monitoring systems AB - Although limb defects associated with other congenital anomalies are rarely studied, they may provide insights into limb development that may be useful for etiologic studies and public health monitoring, me pooled data from II birth defect registries that are part of the International Clearinghouse for Birth Defects Monitoring Systems. We identified 666 infants, born from 1983 through 1993, who had a non-syndromal limb defect plus at least one other major malformation (rate 12.9/100,000 population). We used observed/expected ratios and log-linear models to detect association patterns. We found that specific limb defects occurred with relatively distinct sets of malformations. Preaxial limb defects occurred more frequently with microtia, esophageal atresia, anorectal atresia, heart defects, unilateral kidney dysgenesis, and some axial skeleton defects; postaxial defects with hypospadias; transverse defects with craniofacial defects, micrognathia, ring constrictions, and muscular defects; intercalary defects with omphalocele; split hand/foot with encephalocele; and amelia with anorectal atresia, omphalocele, severe genitalia defects, unilateral kidney dysgenesis, gastroschisis, and ring constriction. Log-linear modeling identified higher order associations among some of these same malformations. (C) 2000 Wiley-Liss, Inc MH - Argentina MH - Brazil MH - Finland MH - France MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Spain MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 10 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000087674100006 L2 - etiology;epidemiology;international registry;limb abnormalities;multiple abnormalities;prevalence;REDUCTION DEFECTS; VASCULAR PATHOGENESIS; MALFORMATIONS; DEFICIENCY; POPULATION; ABNORMALITIES SO - American Journal of Medical Genetics 2000 ;93(2):110-116 1728 UI - 15626 AU - Rosas-Vargas H AU - Montanez C AU - Rendon A AU - Mornet D AU - Garcia F AU - Ceja V AU - Cisneros B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fisiol & Neurociencia, Mexico City 07000, DF, MexicoCHRU, INSERM, EMI 9918, Lab Physiopathol Mol & Cellulaire Retine, F-67091 Strasbourg, FranceFac Pharm Montpellier, INSERM, U300, F-34060 Montpellier, FranceCisneros, B, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Ave Inst Politecn Nacl 2508,Apartado Postal 14-74, Mexico City 07000, DF, Mexico TI - Expression and localization of utrophin in differentiating PC 12 cells AB - To ascertain the role of utrophin in cultured neuronal cells, we investigated its expression and distribution along the NGF-induced differentiation of PC12 cells grown on different substrata. Utrophin mRNA was measured by RT-PCR assay and utrophin protein was quantified by immunoblot analysis. The distribution of utrophin and beta-dystroglycan was analyzed by confocal microscopy. We demonstrate that utrophin protein was increased dr-fold during differentiation of cells grown on laminin. Concomitant with this up-regulation, utrophin was enriched at the growth cones in differentiating cells, where it co-localizes with beta-dystroglycan. These data suggest the presence of a utrophin-beta-dystroglycan complex in PC12 cells that participates in the formation and/or stabilization of the growth cone-extracellular matrix adhesion. NeuroReport 11:2253-2257 (C) 2000 Lippincott Williams & Wilkins MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000088282700038 L2 - beta-dystroglycan;extracellular matrix (ECM);growth cone;nerve growth factor (NGF);PC12 cells;utrophin expression;DYSTROPHIN-RELATED PROTEIN; NERVE GROWTH-FACTOR; EXTRACELLULAR-MATRIX; NEURITE OUTGROWTH; SKELETAL-MUSCLE; CULTURED-CELLS; ADHESION; MEMBRANE; IDENTIFICATION; DYSTROGLYCAN SO - Neuroreport 2000 ;11(10):2253-2257 1729 UI - 15830 AU - Rosas C AU - Cuzon G AU - Gaxiola G AU - Arena L AU - Lemaire P AU - Soyez C AU - van Wormhoudt A AD - UNAM, Fac Ciencias, Lab Ecofisiol, Grp Biol Marina Expt, Cd Del Carmen, Campeche, MexicoIFREMER, COP, Taravao, Tahiti, Fr PolynesiaColl France, F-29900 Concarneau, FranceMuseum Natl Hist Nat, Stn Biol Marine, F-29900 Concarneau, FranceRosas, C, UNAM, Fac Ciencias, Lab Ecofisiol, Grp Biol Marina Expt, Apdo Post 69, Cd Del Carmen, Campeche, Mexico TI - Influence of dietary carbohydrate on the metabolism of juvenile Litopenaeus stylirostris AB - The effect of dietary carbohydrates (CBH) on glucose and glycogen, digestive enzymes, ammonia excretion and osmotic pressure and osmotic capacity of Litopenaeus stylirostris juveniles was studied. The increase of CBH, ranging between 1 and 33%, stimulates activities of alpha-amylase and alpha-glucosidase in the hepatopancreas. High levels of glucose in hemolymph and of glycogen in the hepatopancreas were reached at the highest level of dietary CBH; however, the kinetics of accumulation is different. Shrimps fed with low level of CBH needed 3 h to reached glucose peak, whereas only 1 h is necessary for high CBH levels. A saturation curve was observed in glycogen level and ol-amylase activity with maximum values in shrimp-fed diets containing 21% CBH. This level could be used to be included as a maximum shrimp dietary CBH level. Pre-prandial glycogen levels were observed in shrimp fed a diet containing 1% CBH, indicating an important gluconeogenesis, which affected the protein metabolism. The present results show that a diet containing 10% CBH may not be enough to cover the CBH requirement, which could be satisfied by dietary protein content. The low osmotic capacity observed in shrimp fed on a diet containing 10% CBH coincided with a relatively low post-prandial nitrogen excretion which reflects a low concentration of amino acids circulating in hemolymph, which affected the osmotic pressure and the osmotic capacity. These results reflect the high plasticity of shrimp species to use protein to obtain metabolic energy from food and its limited capacity for processing dietary CBH. (C) 2000 Elsevier Science B.V. All rights reserved MH - Fr Polynesia MH - France MH - Mexico|Campeche PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000087755600003 L2 - carbohydrate metabolism;penaeid shrimp;enzymatic activity;ammonia excretion;osmotic capability;Litopenaeus stylirostris juveniles;PENAEUS-MONODON FABRICIUS; AMMONIA-N EXCRETION; OXYGEN-CONSUMPTION; OSMOREGULATORY CAPACITY; NOTIALIS POSTLARVAE; CRUSTACEA-DECAPODA; ALPHA-GLUCOSIDASE; DISSOLVED-OXYGEN; PROTEIN LEVEL; MOLT STAGE SO - Journal of Experimental Marine Biology and Ecology 2000 ;249(2):181-198 1730 UI - 16548 AU - Rosas E AU - Aboites V AU - Damzen MJ AD - Imperial Coll, Blackett Lab, London SW7 2BZ, EnglandCtr Invest Opt AC, Lab Laseres, Leon 37000, MexicoRosas, E, Imperial Coll, Blackett Lab, London SW7 2BZ, England TI - FWM interaction transfer matrix for self-adaptive laser oscillators AB - The FWM interaction transfer matrix for a self-adaptive laser resonator is deduced. The laser oscillator considered is made of a plane output coupler and an infinite nonlinear FWM medium in a self-intersecting loop geometry. This matrix can be used in different complex configurations to study the spatial evolution of a Gaussian beam. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000085132600031 L2 - ABCD matrices;Gaussian beams;adaptive oscillators;optical phase conjugation;BRILLOUIN-SCATTERING; WAVE FRONTS; RESONATOR SO - Optics Communications 2000 ;174(1-4):243-247 1731 UI - 15875 AU - Rosas N AU - Cabrera A AU - Sharma P AU - Arias JL AU - Garcia JL AU - Arzoumanian H AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Aix Marseille 3, Fac Sci St Jerome, ENSSPICAM, Marseille, FranceRosas, N, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Catalytic hydrocyanation of alpha-ketoalkynes by Ni(CN)(2)/CO/KCN system in alkaline aqueous media: Identification of the active species AB - 5-Hydroxy-3-pyrrolin-2-ones are regioselectively synthesized in a good yield under very mild conditions by tetracyanonickelate (0) ion catalyzed hydrocyanation of alpha-ketoalkynes, in the absence of hydrogen cyanide. The catalyst is prepared in situ in a basic aqueous medium by reduction of Ni(CN)(2) with CO in the excess of KCN. From the LR spectroscopy studies and by evaluation of catalytic activity of some cyanonickelates it is proposed that [Ni(CN)(4)](-4) anion is the active species in the process. A possible mechanism is suggested for the conversion of nickel cyanide to [Ni(CN)(4)](-4). The effect of the reaction variables, e.g.: reaction time, temperature, absorption of carbon monoxide, the concentration of potassium cyanide, water, substrate, and sodium hydroxide were also examined. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000087526500008 L2 - hydrocyanation;tetracyanonickelate;alpha-ketoalkynes;pyrrolinone;NICKEL; HALIDES; CYANIDE SO - Journal of Molecular Catalysis A-Chemical 2000 ;156(1-2):103-112 1732 UI - 15932 AU - Rosas N AU - Salmon M AU - Sharma P AU - Alvarez C AU - Ramirez R AU - Garcia JL AU - Arzoumanian H AD - UNAM, Inst Quim, Mexico City, DF, MexicoFac Sci St Jerome, ENSSPICAM, CNRS, UMR 6516, Marseille, FranceArzoumanian, H, UNAM, Inst Quim, Circuito Exterior CU, Mexico City, DF, Mexico TI - Nickel catalyzed cascade conversion of propargyl halide and propargyl alcohol into 4,6-dimethyl-5-cyano-2-pyrone in water AB - Reaction of propargyl halide or alcohol with CO and KCN in the presence of Ni(CN)(2) in a basic aqueous medium affords 4,6-dimethyl-5-cyano-2-pyrone MH - France MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0300-922X UR - ISI:000087318600002 L2 - CARBONYLATION SO - Journal of the Chemical Society-Perkin Transactions 1 2000 ;10():1493-1494 1733 UI - 15426 AU - Rosas R AU - Riera R AU - Marin JL AU - Leon H AD - Univ Sonora, Dept Invest Fis, PhD Program, Hermosillo 83190, Sonora, MexicoUniv Sonora, Dept Fis, Hermosillo 83000, Sonora, MexicoIS Politecn JA Echeverria, Dept Fis, La Habana 19390, CubaRosas, R, Univ Sonora, Dept Invest Fis, PhD Program, Apdo Postal 5-088, Hermosillo 83190, Sonora, Mexico TI - Energy spectrum of a confined two-dimensional particle in an external magnetic field AB - The energy spectrum of a particle confined within a circle in the presence of an external magnetic field perpendicular to the plane of confinement is studied both exactly and approximately by the quasiclassical formalism (Wentzel-Kramers-Brillouin). For pure spatial confinement (without magnetic field) the energy spectrum for states other than the ground state is twofold degenerate, while in the case of pure magnetic confinement the spectrum shows the infinite-fold degeneration, typical of Landau states. For both types of confinement, the latter infinite-fold degeneration is lifted due to spatial confinement. Interestingly enough, for a given ratio between spatial and magnetic confining lengths, the magnetic flux is quantized. The conditions for the quantization of the flux are established; the nature and peculiarity of the energy spectrum are also discussed. (C) 2000 American Association of Physics Teachers MH - Cuba MH - Mexico|Sonora PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0002-9505 UR - ISI:000088922400018 L2 - QUANTUM-SYSTEMS SO - American Journal of Physics 2000 ;68(9):835-840 1734 UI - 15712 AU - Rosu HC AD - Univ Guanajuato, Inst Fis, Leon 37150, Gto, MexicoInt Ctr Relaticist Astrophys, Rome, ItalyRosu, HC, Univ Guanajuato, Inst Fis, Apdo Postal E-143, Leon 37150, Gto, Mexico TI - Darboux class of cosmological fluids with time-dependent adiabatic indices AB - A one-parameter family of time-dependent adiabatic indices is introduced for any given type of cosmological fluid of constant adiabatic index by a mathematical method belonging to the class of Darboux transformations. The procedure works for zero cosmological constant at the price of introducing a new constant parameter related to the time dependence of the adiabatic index. These fluids can be the real cosmological fluids that are encountered at cosmological scales and they could be used as a simple and efficient explanation for the recent experimental findings regarding the present day accelerating universe. In addition, new types of cosmological scale factors, corresponding to these fluids, are presented MH - Italy MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 14 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000087963900003 L2 - SUPERSYMMETRIC QUANTUM-MECHANICS; UNIVERSE; POTENTIALS SO - Modern Physics Letters A 2000 ;15(15):979-990 1735 UI - 16607 AU - Rosu HC AU - Castro C AD - Univ Guanajuato, Inst Fis, Guanajuato 37150, MexicoClark Atlanta Univ, Ctr Theoret Studies Phys Syst, Atlanta, GA 30314, USARosu, HC, Univ Guanajuato, Inst Fis, Apdo Postal E-143, Guanajuato 37150, Mexico TI - q-deformation by intertwinning with application to the singular oscillator AB - We present a Version of q-deformed calculus based on deformed counterparts of Darboux intertwining operators. The case in which the deformed transformation function is of the vacuum type is detailed, but the extension to counterparts of excited states used as Darboux transformation functions is also formally discussed. The method lends to second-order Fokker-Planck-like deformed operators which may be considered as supersymmetric partners, though for a sort of q-deformed open systems, i.e., those possessing q nonlocal drift terms, potential part, as well as q-spreaded vacuum fluctuations. The undeformed limit corresponds to the conservative case, since all q nonlocalities wash out. The procedure x(-2) singular oscillator, for which we also present a formal rl generalization of the Bagrov-Samsonov applied to the x(-2) coherent states. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000084914100004 L2 - COHERENT STATES; FRACTIONAL STATISTICS; HARMONIC-OSCILLATOR; COULOMB PROBLEM; HAMILTONIANS; SPECTRA; ALGEBRA; BODY SO - Physics Letters A 2000 ;264(5):350-356 1736 UI - 15241 AU - Rothenberg SJ AU - Schnaas L AU - Perroni E AU - Hernandez RM AU - Ortega JF AD - Charles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoNatl Inst Perinatol, Dept Dev Neurobiol, Mexico City, DF, MexicoNatl Inst Perinatol, Pediat Unit, Mexico City, DF, MexicoRothenberg, SJ, Charles R Drew Univ Med & Sci, Dept Anesthesiol, MP 10,1621 E 120th St, Los Angeles, CA 90059 USA TI - Blood lead secular trend in a cohort of children in Mexico City. II. 1990-1995 AB - The authors determined the secular trend in blood lead levels in a cohort of 91 children born in Mexico City between 1987 and the beginning of 1993. The authors grouped children by calendar year in which they reached 36 mo of age (i.e., 1990-1995), and their blood lead levels were measured every 6 mo during a 66-mo period. The overall geometric mean blood lead level was 8.6 mu g/dl (range = 1.0-61.0 mu g/dl). A repeated measures analysis of variance revealed a significant downward linear trend in blood lead levels by year (p < .001)-from an estimated marginal geometric mean of 14.2 mu g/dl in 1990 to 6.3 mu g/dl in 1995. There was also a significant linear age effect (p < .001); blood lead levels generally fell during the 36th-66th mo. Family use of lead-glazed pottery significantly elevated blood lead levels (p = .006), and the effect magnified as age increased (Age x Pottery Interaction [p = .014]). Although the overall downward trend in blood lead levels during the time period described corresponded to a reduction in various sources of lead exposure, there was no alteration in production, distribution, or use of leaded pottery. Currently use of lead-glazed ceramic pottery is one of the most profound sources of lead exposure in the Mexican population MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000089447100005 L2 - NATIONAL-HEALTH; EXPOSURE; NHANES; AGE SO - Archives of Environmental Health 2000 ;55(4):245-249 1737 UI - 15304 AU - Rothenberg SJ AU - Poblano A AU - Schnaas L AD - Natl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca 62508, Morelos, MexicoCharles R Drew Univ Med & Sci, Dept Anesthesiol, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Perinatol, Dept Dev Neurobiol, Mexico City 11000, DF, MexicoNatl Inst Human Commun, Mexico City 01480, DF, MexicoRothenberg, SJ, Natl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca 62508, Morelos, Mexico TI - Brainstem auditory evoked response at five years and prenatal and postnatal blood lead AB - Previous work from this laboratory demonstrated an association between higher maternal blood lead level at 20 weeks of pregnancy and increased I-V and III-V interpeak intervals in the brainstem auditory evoked response (BAER) recorded in 1-month-old infants. We repeated the BAER measurements with a larger group of children (n = 100-113) from the same study at 5-7 years. Maternal blood lead level at 20 weeks of pregnancy (geometric mean = 7.7 mu g/dl; range 1-30.5 mu g/dl) was the only prenatal blood lead level significantly associated with I-V and III-V interpeak interval in a multiple regression model controlling for head circumference and age at time of testing and sex. In contrast to the findings at 1 month of age, interpeak intervals decreased as a linear function of increasing 20-week maternal blood lead. A nonlinear, orthogonal, second-order polynomial model was a significantly better fit to the data than the linear model. The nonlinear model showed I-V and III-V interpeak intervals decreased as blood lead rose from 1 to 8 mu g/dl, and then increased as blood lead rose from 8 to 30.5 mu g/dl. We hypothesized that the negative linear term was related to lead effect on brainstem auditory pathway length, and that the positive quadratic term was related to neurotoxic lead effect on synaptic transmission or conduction velocity. We found support for the brainstem length interpretation in the data, showing that 6-year-old head circumference in these children significantly decreased with increased maternal 20-week blood lead level. Increasing postnatal blood lead at 12 and 48 months was related only to decreased BAER conduction intervals across the entire blood lead range, suggesting only pathway length effects. Alterations in BAER at this age may indicate that the effect of prenatal lead exposure on the auditory brainstem is permanent, as response latencies reach essentially adult values by 4 years of age. (C) 2000 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Neurosciences;Toxicology U5 - J;Article AV - English IS - 0892-0362 UR - ISI:000089115900002 L2 - lead;Pb;brainstem;auditory;evoked response;BAER;children;AGE 5 YEARS; STEM RESPONSE; PORT PIRIE; CHILDREN; EXPOSURE; MONKEYS; COHORT; MATURATION; BIRTH; TIME SO - Neurotoxicology and Teratology 2000 ;22(4):503-510 1738 UI - 16563 AU - Rothenberg SJ AU - Khan F AU - Manalo M AU - Jiang JA AU - Cuellar R AU - Reyes S AU - Acosta S AU - Jauregui M AU - Diaz M AU - Sanchez M AU - Todd AC AU - Johnson C AD - Charles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoMt Sinai Sch Med, Dept Community & Prevent Med, New York, NY, USARothenberg, SJ, Charles R Drew Univ Med & Sci, Environm Res Ctr, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Maternal bone lead contribution to blood lead during and after pregnancy AB - We examined bone lead contribution to blood lead in a group of 311 immigrant women, 99% from Latin America, during the third trimester of pregnancy and 1 to 2 months after delivery. We measured in vivo tibia and calcaneus (heel) bone lead concentration in the postdelivery period with K shell X-ray fluorescence. Prenatal and postnatal geometric mean (range) blood lead level was 2.2 mu g/dL (0.4 to 38.7) and 2.8 mu g/dL (0.4 to 25.4), reflecting low current exposure. Postnatal blood lead level was significantly higher than prenatal (P < 0.0001). Mean (range) tibia and calcaneus lead concentration was 6.7 mu g/g (-33.7 to 62.2) and 8.4 mu g/g (-30.1 to 66.4), reflecting varying but elevated past lead exposure. Mean calcaneus lead concentration was significantly higher than mean tibia lead concentration (P = 0.055). Variance-weighted multiple regression and structural equation models showed that both calcaneus and tibia lead were directly associated with prenatal blood lead but only calcaneus lead was associated with postnatal blood lead. Increasing natural log years in the United States independently predicted decreasing calcaneus and third-trimester blood lead. The data suggest that while some exogenous lead sources and modulators of blood lead level, such as use of lead-glazed pottery and calcium in the diet, control lead exposure during and after pregnancy, endogenous lead sources from past exposure before immigration continue to influence blood lead levels in this sample. (C) 2000 Academic Press MH - USA MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 27 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000085131100008 L2 - blood lead;bone lead;pregnancy;calcium;Latina;X-RAY-FLUORESCENCE; MEXICO-CITY; WOMEN; MOBILIZATION; DETERMINANTS; INCREASES; SKELETON; EXPOSURE; MEN SO - Environmental Research 2000 ;82(1):81-90 1739 UI - 16629 AU - Roy S AU - Silverberg N AU - Romero N AU - Deibel D AU - Klein B AU - Savenkoff C AU - Vezina AF AU - Tremblay JE AU - Legendre L AU - Rivkin RB AD - Univ Quebec, ISMER, Rimouski, PQ G5L 3A1, CanadaCtr Interdisciplinario Ciencias Marinas, La Paz 23096, BCS, MexicoUniv Quebec, Dept Oceanog, Rimouski, PQ G5L 3A1, CanadaMem Univ Newfoundland, Ctr Ocean Sci, St Johns, NF A1C 5S7, CanadaUniv Laval, GIROQ, St Foy, PQ G1K 7P4, CanadaFisheries & Oceans Canada, Maurice Lamontagne Inst, Mt Joli, PQ G5H 3Z4, CanadaRoy, S, Univ Quebec, ISMER, 310 Allee Ursulines, Rimouski, PQ G5L 3A1, Canada TI - Importance of mesozooplankton feeding for the downward flux of biogenic carbon in the Gulf of St. Lawrence (Canada) AB - We tested the importance of mesozooplankton feeding and defecation for the downward flux of biogenic carbon (C) in the Gulf of St. Lawrence, a marine coastal environment characterized by high zooplankton abundance. Five stations were sampled over nine cruises between July 1992 and June 1994, The rates of chlorophyll (Chl) ingestion and C defecation were determined for the major copepod species. Free-drifting, short-term (24 h) sediment traps were deployed at the sampled sites at 50 and 150 m, and the trap contents were analyzed for fecal pellets (microscopy), Chi and pheopigments (chromatography). The flux at 50 m of C associated with fecal pellets ranged between 5 and 138 mg C m(-2) d(-1), while total POC flux varied between 78 and 302 mg C m(-2) d(-1). Of the total POC found in sediment traps at 50 m, close to 50%, on average, was composed of zooplankton fecal pellets. In contrast, direct algal (Chl) sinking was < 10%. The fecal pellet contribution varied seasonally, with a maximum (> 73%) in June 1994 at all stations. This maximum did not necessarily coincide with the highest rate of production of fecal pellets in the surface waters, indicating that other factors influenced the sinking of fecal pellets. A shallow mixed-layer depth seemed to favor fast removal from the surface. The average fecal pellet contribution to the total downward POC flux was slightly higher for stations 4 and 5 (52% compared with 39% for the other stations). These stations were characterized by zooplankton communities that differed from those of the other stations, smaller copepods such as Temora longicornis frequently dominating at stations 4 and 5, while Calanus spp. dominated at stations 1, 2 and 6. High fluxes of fecal pellets frequently occurred when the index of herbivory (Chl ingestion : total C ingestion) was low, transferring downwards carbon of heterotrophic origin. The contribution of C-transformed pheopigments to total POC flux was low (6% on average). It co-varied with the degree of herbivory in the overlying waters. The production of fecal pellets in the top 50 m co-varied with Chi ingestion, but not with the index of herbivory, consistent with an algal food intake representing < 50% of total C ingested. Phytoplankton ingestion was highest when primary production (not algal biomass) was maximum. In consequence, mesozooplankton feeding did not exert a strong control over the phytoplankton biomass of the Gulf of St. Lawrence (at most 10%), but it was more closely tied to primary production. Phytoplankton biomass is more likely controlled by physical factors in this region. Mesozooplankton fecal pellets contributed significantly to the downward flux of biogenic C all through the year in this environment, transferring alternatively C of autotrophic and heterotrophic origin. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 25 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000084933000007 L2 - ZOOPLANKTON FECAL PELLETS; CALANUS-FINMARCHICUS; PHYTOPLANKTON DYNAMICS; NORWEGIAN SEA; GUT PIGMENT; PARTICLES; FOOD; SEDIMENTATION; INSITU; COPEPODS SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2000 ;47(3-4):519-544 1740 UI - 16618 AU - rreola-Risa C AU - Mock CN AU - Lojero-Wheatly L AU - de la Cruz O AU - Garcia C AU - Canavati-Ayub F AU - Jurkovich GJ AD - Hosp San Jose TEC, Emergency Dept, Monterrey, NL, MexicoSanta Engracia Med Ctr, Dept Surg, San Pedro Garza Garcia, NL, MexicoUniv Washington, Dept Surg, Seattle, WA 98195, USACruz Verde Monterrey, Monterrey, NL, MexicoInst Tecnol & Estudios Super, Monterrey, NL, MexicoMock, CN, Harborview Med Ctr, Dept Surg, Box 359796,325 9th Ave, Seattle, WA 98104 USA TI - Low-cost improvements in prehospital trauma care in a Latin American city AB - Objective: Prehospital care is a critical component of efforts to lower trauma mortality, In less-developed countries, scarce resources dictate that any improvements in prehospital care must be low in cost. In one Latin American city, recent efforts to improve prehospital care have included an increase in the number of sites of ambulance dispatch from two to four and introduction of the Prehospital Trauma Life Support (PHTLS) course. Methods: The effect of increased dispatch sites was evaluated by comparing response times before and after completion of the change. The effect of PHTLS was evaluated by comparing prehospital treatment for the 3 months before initiation of the course (n = 361 trauma patients) and the 6 months after (n = 505), Results: Response time decreased from a mean of 15.5 +/- 5.1 minutes, when there were two sites of dispatch, to 9.5 +/- 2.7 minutes, when there were four sites. Prehospital trauma care improved after initiation of the PHTLS course. For all trauma patients, use of cervical immobilization increased from 39 to 67%. For patients in respiratory distress, there were increases in the use of oropharyngeal airways (16-39%), in the use of suction (10-38%), and in the administration of oxygen (64-87%), For hypotensive patients, there was an increase in use of large-bore intravenous lines from 26 to 58%. The improved prehospital treatment did not increase the mean scene time (5.7 +/- 4.4 minutes before vs. 5.9 +/- 6.8 minutes after). The percent of patients transported who died in route decreased from 8.2% before the course to 4.7% after. These improvements required a minimal increase (16%) in the ambulance service budget. Conclusion: Increase in sites of dispatch and increased training in the form of the PHTLS course improved the process of prehospital care in this Latin American city and resulted in a decrease in prehospital deaths. These improvements were low cost and should be considered for use in other Less developed countries MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 29 U4 - Critical Care Medicine;Surgery U5 - J;Article AV - English IS - 1079-6061 UR - ISI:000084857400023 L2 - trauma;injury;less-developed country;prehospital;developing country;developing world;LIFE-SUPPORT PROGRAM; INJURIES; SYSTEM SO - Journal of Trauma-Injury Infection and Critical Care 2000 ;48(1):119-124 1741 UI - 16310 AU - Ruano JLG AU - Gamboa AE AU - Gutierrez LG AU - Castro AMM AU - Ramos JHR AU - Yuste F AD - Univ Autonoma Madrid, Dept Quim Organ, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRuano, JLG, Univ Autonoma Madrid, Dept Quim Organ, E-28049 Madrid, Spain TI - Synthesis and Diels-Alder reactions of a new kind of chiral dienophiles: Cyclic vinyl-p-tolylsulfilimines AB - A new kind of chiral dienophiles, cyclic vinyl-p-tolylsulfillimines (2a and 2b), were obtained from the corresponding (Z)-sulfinylacrylonitriles with HBF4 and methanol, The asymmetric Diels-Alder reaction of optically pure 2a with cyclopentadiene under mild thermal or catalyzed conditions afforded only the endo-4a adduct with complete endo and pi-facial selectivities, The ability of the sulfilimine moiety to enhance the dienophilic reactivity of the double bond is similar to that of the sulfinyl group MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1523-7060 UR - ISI:000085982200004 L2 - SULFOXIDES SO - Organic Letters 2000 ;2(6):733-736 1742 UI - 15065 AU - Rubio LRB AU - Ortiz JL AU - Sada RV AD - Inst Astrofis Canarias, E-38200 La Laguna, Canary Islands, SpainCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUniv Monterrey, Dept Fis & Matemat, Monterrey 66238, Nuevo Leon, MexicoRubio, LRB, Inst Astrofis Canarias, Via Lactea, E-38200 La Laguna, Canary Islands, Spain TI - Luminous efficiency in hypervelocity impacts from the 1999 lunar Leonids AB - An analysis of the optical flashes produced by Leonid meteoroids impacting the Moon in 1999 November is carried out in order to estimate the fraction of kinetic energy converted into radiation, the so-called luminous efficiency eta. It is shown that the observational data are consistent with luminous efficiencies of 2 x 10(-3) in the wavelength range of 400-900 nm with an uncertainty of about 1 order of magnitude. This experimental value of eta is significantly larger than previous estimates for meteoroids of asteroidal composition based on numerical calculations and scaling laws from laboratory collisions. According to our results, the luminous efficiency might vary with mass, i.e., the smaller impactors converting less kinetic energy into light and vice versa. A comparison with recent numerical simulations for meteoroids of cometary composition is also carried out MH - Mexico|Nuevo Leon MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089954500017 L2 - meteors, meteoroids;Moon;plasmas;radiation mechanisms : thermal;METEOROIDS; SEARCH; STREAM SO - Astrophysical Journal 2000 ;542(1):L65-L68 1743 UI - 16644 AU - Rubio R AU - Ceballos G AD - Univ Virginia, Dept Physiol, Charlottesville, VA 22903, USAUniv Autonoma San Luis Potosi, Dept Physiol, San Luis Potosi 78210, MexicoInst Politecn Nacl, Mexico City 11340, DF, MexicoRubio, R, Univ Autonoma San Luis Potosi, Dept Fis, Fac Med, San Luis Potosi 78210, Mexico TI - Role of the endothelial glycocalyx in dromotropic, inotropic, and arrythmogenic effects of coronary flow AB - Coronary flow regulates cardiac functions, and it has been suggested that endothelial membrane glycosylated proteins are the primary shear stress mechanosensors. Our hypothesis was that if these proteins are the sensors for flow, then intracoronary perfusion of lectins or specific antibodies should differentially depress coronary flow-enhanced responses of different parenchymal cell types such as auricular-ventricular (A-V) nodal cells (dromotropic effect), contractile myocytes (inotropic effect), and junctional Purkinje-muscle cells (spontaneous ventricular rhythm). The coronary flow stimulatory effects on A-V delay and spontaneous ventricular rhythm were selectively depressed by six of eight lectins. None of the lectins depressed the coronary flow inotropic effect. Antibodies against endothelial surface proteins, alpha(v)beta(5)-integrin and sialyl-Lewis(b) glycan, depressed the dromotropic but not the inotropic effects of coronary flow, whereas the vascular cell adhesion molecule 1 antibody had no effect on the dromotropic, but enhanced the inotropic, effect. The fact that lectins and antibodies differentially depressed regional coronary flow effects suggests that there is a chemical distinctiveness in their intravascular endothelial cell surfaces. However, nonselective cross-linking of endothelial glycocalyx proteins with 2,000-kDa dextranaldehyde or vitronectin indistinctively depressed the dromotropic and inotropic effects of coronary flow. These results indicate that coronary flow-induced stress acts on specific structures located in the capillary intravascular membrane glycocalyx MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Cardiac & Cardiovascular Systems;Physiology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0363-6135 UR - ISI:000084784000014 L2 - mechanical transmission-transduction;shearing forces;extracellular matrix molecules;mechanosensors;endothelial extracellular mediators;glycoproteins;capillary perfusion;intravascular endothelial glycoproteins;GUINEA-PIG HEART; SHEAR-STRESS; MICROVASCULAR ENDOTHELIUM; CELL GLYCOCALYX; RAT-HEART; SURFACE; MECHANISM; HEPARIN; RABBIT; IDENTIFICATION SO - American Journal of Physiology-Heart and Circulatory Physiology 2000 ;278(1):H106-H116 1744 UI - 15889 AU - Rubo YG AU - Lea MJ AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv London, Egham TW20 0EX, Surrey, EnglandRubo, YG, UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Dynamics of a 2D Wigner solid in a magnetic field: the plastic limit AB - We analyse the AC response of an unpinned Wigner crystal with plastic deformation and of a viscous electron fluid, allowing for the mixing of the transverse and longitudinal vibrational modes by an applied magnetic field. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000087423100399 L2 - conductivity;plastic deformation;Wigner crystal;CRYSTAL SO - Physica B 2000 ;284():1922-1923 1745 UI - 14850 AU - Rudnitskij GM AU - Lekht EE AU - Mendoza-Torres JE AU - Pashchenko MI AU - Berulis II AD - Sternberg Astron Inst, Moscow 119899, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoRussian Acad Sci, Pushchino Radio Astron Observ, Astrosp Ctr, Lebedev Inst Phys, Pushchino 142292, Moscow Region, RussiaKaunas Univ Technol, LT-3006 Kaunas, LithuaniaRudnitskij, GM, Sternberg Astron Inst, 13 Universitetskij Prospekt, Moscow 119899, Russia TI - Variability of the H2O maser associated with U Orionis AB - H2O line observations at lambda = 1.35 cm of the Mira Ceti-type variable star U Ori are reported. The observations cover the time interval from March, 1980, to September, 1999, Variations of the integral flux and velocity centroid of the H2O line are analysed. The flux in general correlates with the visual light curve, following it with some phase delay Delta phi similar to 0.2 - 0.4P (P is the period of the star). The maser emission is generated in a quasistationary layer of gas and dust at a distance of about 10(14) cm from the stellar centre, The maser variability is explained by the action of periodic shocks, driven by stellar pulsation and arriving to the maser in each stellar cycle. The shocks provide the maser Dumping, whereas the sink of the waste energy is controlled by the dust, periodically heated by the stellar radiation near the light maximum; this accounts for the correlation of tho maser radiation maximum with the descending branch of the light curve. Temporary weakness of the maser emission may be due to decay of the quasi-stationary layer, which is then rebuilt LS a powerful shuck, carrying an ay from the star a portion of the lost mass, once per a few stellar periods - the "superperiod". Ill its turn, the superperiod may reflect multiperiodic pulsation of tie star or the presence of a long-term activity cycle, connected with restructuring of the stellar magnetic field, which is known to be strong in U Ori MH - Lithuania MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0365-0138 UR - ISI:000165383900005 L2 - stars : variables : Miras;circumstellar matter;stars : individual : U Ori;radio lines : stars;masers;shock waves;LATE-TYPE STARS; SERIES INFRARED-SPECTROSCOPY; VAPOR RADIO LINE; LONG-TERM; VLBI OBSERVATIONS; MIRA VARIABLES; EVOLVED STARS; OH-EMISSION; ENVELOPE; SIO SO - Astronomy & Astrophysics Supplement Series 2000 ;146(3):385-395 1746 UI - 14472 AU - Ruiz-Arguelles GJ AU - Garces-Eisele J AU - Gelbart T AU - Monroy-Barreto M AU - Reyes-Nunez V AU - Juarez-Morales JL AU - Gonzalez-Garrido ML AU - Ramirez-Cisneros FJ AD - Univ Americas Puebla, Labs Clin Puebla, Ctr Hematol & Med Interna Puebla, Puebla, MexicoScripps Res Inst, Dept Mol & Expt Med, La Jolla, CA, USAUniv Popular Autonoma Estado Puebla, Puebla, Mexico TI - Analysis of HFE-codon 63/282 (H63D/C282Y) gene variants in Mexican Mestizos: Blood donors and patients with hereditary hemochromatosis MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000165256200026 SO - Blood 2000 ;96(11):8B-8B 1747 UI - 15314 AU - Ruiz-Campos G AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoRuiz-Campos, G, PMB 064,POB 189003, Coronado, CA 92178, USA TI - Threatened fishes of the world: Fundulus lima Vaillant, 1894 (Fundulidae) MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000089120500003 SO - Environmental Biology of Fishes 2000 ;59(1):20-20 1748 UI - 15921 AU - Ruiz-Chavarria G AU - Ciliberto S AU - Baudet C AU - Leveque E AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, MexicoEcole Normale Super Lyon, Phys Lab, CNRS, UMR 5672, F-69364 Lyon, FranceRuiz-Chavarria, G, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, Mexico TI - Scaling properties of the streamwise component of velocity in a turbulent boundary layer AB - Experimental results concerning the statistics of the streamwise component of velocity in a turbulent boundary layer near a solid wall are presented. Energy spectra, probability density functions and velocity structure functions are investigated as a function of the distance to the wall. Energy spectra and structure functions display power-law scalings which depend on this distance. On the other hand, the relative behavior of structure functions remains constant in the logarithmic sublayer. This behavior exhibits two distinct power-laws. At small scales, relative scaling exponents are relatively close to those usually reported in isotropic and homogeneous turbulence. At larger scales, where shear effects are dominant, relative exponents display larger intermittency corrections. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000087411200002 L2 - turbulent boundary layer;probability density function;structure functions;EXTENDED SELF-SIMILARITY; FLOWS SO - Physica D-Nonlinear Phenomena 2000 ;141(3-4):183-198 1749 UI - 16147 AU - Ruiz-Martinez VC AU - Osete ML AU - Vegas R AU - Nunez-Aguilar JI AU - Urrutia-Fucugauchi J AU - Tarling DH AD - Univ Complutense, FCC Fis, Dept Geofis, E-28040 Madrid, SpainUniv Complutense, FCC Geol, Dept Geodinam, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Plymouth, Dept Geol Sci, Plymouth PL4 8AA, Devon, EnglandRuiz-Martinez, VC, Univ Complutense, FCC Fis, Dept Geofis, E-28040 Madrid, Spain TI - Palaeomagnetism of Late Miocene to Quaternary volcanics from the eastern segment of the Trans-Mexican Volcanic Belt AB - A systematic palaeomagnetic study in the eastern part of the Trans-Mexican Volcanic Belt includes 39 Miocene, Pliocene and Quaternary volcanic rocks in the southeastern Mexico Basin (Sierra Nevada and Sierra de Rio Frio), the Altiplano area, and the Palma Sola Massif. A total of 430 samples have been selectively demagnetized using mostly alternating field demagnetizing methods, supplemented by thermal analyses. Most characteristic remanences are carried by low-Ti titanomagnetites, with occasional titanohematites or slightly maghemitized low-Ti titanomagnetites, of similar direction. Seven sites were discarded because they presented intermediate directions, hydrothermal alteration or were remagnetized by lightning strikes. The mean directions of 32 sites, together with 24 sites from Sierra de las Cruces in the western Mexico basin, indicate rocks older than 2 Ma are rotated some 10 degrees counterclockwise with respect to Quaternary rocks, whereas there is no rotational difference between Miocene and Pliocene rocks. Statistical analyses between different regrouped populations confirm that the rotational pattern is due to the age of the volcanics rocks but not to their spatial distribution. The Quaternary mean direction from the three Mexico Basin ranges is consistent with the geographical reference pole. In contrast, the Pliocene mean direction from volcanic rocks of the Altiplano area and the Sierra de Las Cruces is slightly rotated some 10 degrees westwards with respect to the reference direction from North America. No significant rotations have been observed in the eastern TMVB (from the western Mexico Basin to the border of the Altiplano), between late Miocene and late Pliocene times. It suggests that a very small, counterclockwise vertical-axis rotation may have been taken place in this segment of the TMVB between late Pliocene and Quaternary times. Comparisons of these results with a summary of the available palaeomagnetic data in the area indicate that the previously reported Quaternary rotations are of questionable reliability, and that the large counterclockwise rotations, reported in Cretaceous to Miocene rocks, probably took place before the late Miocene. These new palaeomagnetic data support the idea that the eastern TMVB since the late Miocene, has been a zone of extension with a little, left-lateral shear component. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700011 L2 - block rotations;palaeomagnetism;tectonics;Trans-Mexican Volcanic Belt;volcanism;REMAGNETIZATION CIRCLES; TECTONIC INTERPRETATION; PALEOMAGNETIC RECORD; SUBDUCTED RIVERA; WESTERN MEXICO; COCOS PLATE; SEISMICITY; AMERICA SO - Tectonophysics 2000 ;318(1-4):217-233 1750 UI - 15858 AU - Ruiz-Trejo E AU - Kilner JA AD - Univ Nacl Autonoma Mexico, Dept Fis & Quim Teor, Fac Quim, Mexico City 04510, DF, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, EnglandRuiz-Trejo, E, Univ Nacl Autonoma Mexico, Dept Fis & Quim Teor, Fac Quim, Mexico City 04510, DF, Mexico TI - Deuterium conductivity, diffusion and implantation in Sr-doped LaYO3 AB - A study of deuterium conductivity and diffusion in the oxide perovskite La0.9Sr0.1YO3-delta is presented in this work. Deuterium ions were implanted into La0.9Sr0.1YO3-delta (50 keV, 1 x 10(16) atoms/cm(2)) and the corresponding deuterium depth profile was determined by SIMS and compared with a Monte Carlo simulation (TRIM96). This implant was used as a standard for the determination of deuterium concentration in a La0.9Sr0.1YO3-delta sample pre-treated in D2O atmosphere. In this way, it was fully confirmed that La0.9Sr0.1YO3-delta incorporates water at high temperatures. The conductivity of La0.9Sr0.1YO3-delta was measured in D2O atmosphere and compared with other proton (deuteron) conductors. Concentration and conductivity data were used in conjunction to estimate the deuterium diffusivity and the constant of reaction of (heavy) water incorporation into LaYO3. Some comments on the catalytic activity of this oxide are made. (C) 2000 Elsevier Science BN. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0167-2738 UR - ISI:000087541300015 L2 - deuteron conduction;SIMS;implant;diffusion;LaYO3;proton conductivity;ELASTIC NEUTRON-SCATTERING; GAMMA-ACTIVATION-ANALYSIS; MASS-SPECTROMETRY SIMS; PEROVSKITE-TYPE OXIDES; PROTON CONDUCTIVITY; OXYGEN DIFFUSION; HYDROGEN DEFECTS; EARTH-OXIDES; SRCEO3; THERMOGRAVIMETRY SO - Solid State Ionics 2000 ;130(3-4):313-324 1751 UI - 16136 AU - Ruiz-Verdugo CA AU - Ramirez JL AU - Allen SK AU - Ibarra AM AD - Ctr Invest Biol Noroeste SC, Programa Acuacultura & Biotecnol Marina, Lab Genet Acuicola, La Paz 23000, Baja Calif Sur, MexicoVirginia Inst Marine Sci, Aquaculture Genet & Breeding Technol Ctr, Gloucester Point, VA 23062, USAIbarra, AM, Ctr Invest Biol Noroeste SC, Programa Acuacultura & Biotecnol Marina, Lab Genet Acuicola, Apdo Postal 128, La Paz 23000, Baja Calif Sur, Mexico TI - Triploid catarina scallop (Argopecten ventricosus Sowerby II, 1842): growth, gametogenesis, and suppression of functional hermaphroditism AB - Triploidy was induced in catarina scallop, Argopecten ventricosus, using two concentrations of cytochalasin-B (CB). Growth of triploid scallops exceeded that of diploids in all evaluated traits. The largest percent difference between the diploid control group and the treated groups was seen after diploid scallops reached the peak of sexual maturation and began spawning. The gonad of triploid scallops was easily recognizable by visual inspection because of a brownish discoloration and lack or few egg masses present. That characteristic allowed for the separation of 'putative triploids' (PTs), which when compared with diploid scallops from within the same treatment (treated diploids), had a significantly larger muscle weight than the differences seen between treated and control groups. Gametogenesis and the condition of hermaphroditism in this normally functional hermaphrodite were greatly affected by the triploid condition. In the female portion of the gonad, few oocytes developed. The male portion of the gonad was arrested early during development, and the male acini were replaced by female acini, producing all female gonads in increasing percentages during the culture period, suppressing the normal condition of hermaphroditism. Oocytes of diploids were larger than those of triploids early in the culture, probably because of delayed maturation in triploids. Later during the culture, oocytes of triploids were larger than those of diploids only when compared with treated diploids. (C) 2000 Elsevier Science B.V. all rights reserved MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000086694500002 L2 - triploid;hermaphrodite;gametogenesis;growth;mollusk;scallop;Argopecten ventricosus;CRASSOSTREA-GIGAS THUNBERG; SACCOSTREA-COMMERCIALIS IREDALE; BLOCKING MEIOSIS-I; PACIFIC OYSTERS; MYTILUS-EDULIS; BIOCHEMICAL-COMPOSITION; ABNORMAL GAMETOGENESIS; PEARL OYSTER; TOTAL WEIGHT; SHELL WIDTH SO - Aquaculture 2000 ;186(1-2):13-32 1752 UI - 14542 AU - Ruiz RFC AU - Heredia G AD - Inst Invest Fundamentales Agr Trop Alejandro Humb, La Habana 17200, CubaAC, Inst Ecol, Xalapa, Veracruz, MexicoRuiz, RFC, Inst Invest Fundamentales Agr Trop Alejandro Humb, Calle 1 Esq 2, La Habana 17200, Cuba TI - Carrismyces, a new genus of hyphomycetes from a cloud forest in Mexico AB - Carrismyces proliferatus anam. gen. & sp. nov., a new genus of hyphomycetes collected on the rotten stem of a tree fern (Cyathea sp.) in a Mexican cloud forest, is described and illustrated. The genus is characterized by monotretic, percurrent conidiogenous cells and obconical, subglobose, broadly pyriform to turbinate, muriform, dark brown or black conidia often with short, colourless, conical appendages. Notes on closely related genera are given MH - Cuba MH - Mexico|Veracruz PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000166131700013 L2 - Carrismyces;Hyphomycetes;Mexico;systematics;tropical fungi SO - Mycotaxon 2000 ;76():125-130 1753 UI - 14543 AU - Ruiz RFC AU - Heredia G AD - Inst Invest Fundamentales Agr Trop Alejandro Humb, La Habana 17200, CubaAC, Inst Ecol, Xalapa, Veracruz, MexicoRuiz, RFC, Inst Invest Fundamentales Agr Trop Alejandro Humb, Calle 1 Esq 2, La Habana 17200, Cuba TI - A new species of neta from leaf litter in Mexico AB - Nera gigaspora anam, sp. nov. is described and illustrated from rotten leaves collected in the rain forest of Chajul, Chiapas, Mexico. It is characterized by cylindrical, 5-7-septate, guttulate conidia arising from long, denticulate conidiogenous cells. Notes on closely related species and a key to Neta species are provided MH - Cuba MH - Mexico|Veracruz PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000166131700014 L2 - Neta;Hyphomycetes;systematics;tropical fungi;Mexico SO - Mycotaxon 2000 ;76():131-134 1754 UI - 14983 AU - Rumazo CA AU - Pryor A AU - Mendoza FO AU - Villareal JC AU - Robledo JM AU - Mercado ER AD - ESFM, Edificio Lab Pesados, Ctr Mexicano Prod Limpia, Mexico City 07738, DF, MexicoGeorgia Pacific Corp, Atlanta, GA 30303, USAQuim Fina Farmex SA CV, Corregidora 76920, Queretaro, MexicoQuimir SA CV, Tultitlan 54940, Edo De Mexico, MexicoRumazo, CA, Apartado Postal 6-644, Bridgeport, CT 06602, USA TI - Cleaner production in the chemical industry AB - A cleaner production demonstration study was developed in 1998 for the chemical industry by the Mexican Center for Cleaner Production with the support of the United States Agency for International Development (USAID). The project's objective was to develop cleaner production assessments for chemical plants by identifying and evaluating process and energy cleaner production opportunities for technical feasibility, economic benefit and environmental impact. Four plants in the chemical industry groups of inorganic and organic chemicals and plastic materials and synthetic resins were involved. The main results are: (1) a reduction of solid toxic residues in the organic chemicals plant of 3,474 kg/year with after-tax savings of US$ 318,304/year; (2) an increase in plant capacity of 56%, and 10% reduction in VOCs emissions in the plasticizers and epoxidated soybean oil plant with after-tax savings of US$2,356,000/year; (3) a reduction of 31,150 kg/year of ethylene oxide emissions with after-tax savings of US$ 17,750/year in the polyethylene glycol plant and (4) a reduction of CO2 emissions of 9.21 % with after-tax savings of US$ 44,281/year in the inorganic chemicals plant. The principal areas for improvement in the chemical industry are process control and instrumentation, process design, maintenance programs and providing adequate utilities for the plants MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - USA PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400002 L2 - chemicals;cleaner production;Mexican chemical industry;pollution prevention;process and energy optimization SO - Water Science and Technology 2000 ;42(5-6):1-7 1755 UI - 15358 AU - Russell ND AU - Rios J AU - Erosa G AU - Remmenga MD AU - Hawkins DE AD - New Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003, USANew Mexico State Univ, Program Mol Biol, Las Cruces, NM 88003, USANew Mexico State Univ, Ctr Stat, Las Cruces, NM 88003, USAUniv Chihuahua, Chihuahua, MexicoHawkins, DE, New Mexico State Univ, Dept Anim & Range Sci, Box 30003,Dept 3-I, Las Cruces, NM 88003 USA TI - Genetic differentiation among geographically isolated populations of Criollo cattle and their divergence from other Bos taurus breeds AB - The microsatellites HEL5, HEL9, INRA063, and BM2113 were used to analyze genetic similarities and differences of geographically isolated Criollo cattle herds in Mexico. Criollo cattle from five counties within the state of Chihuahua and one county from the state of Tamaulipas (n =60) were sampled. The five counties in Chihuahua included Cerocahui (n = 14), Chinipas (n = 10), Guachochi (n = 15), Morelos (n = 30), and Temoris (n = 9). Samples of DNA were amplified by PCR and separated on a 746 polyacrylamide gel. Microsatellite size was established by comparison to M13mp18 DNA ladder and a documented set of four bovine controls. Allele frequencies and genotypic deviations from Hardy-Weinberg equilibrium were tested using the GENEPOP program. Eleven alleles were generated at HEL5 for the populations sampled (149 to 169 bp). Allele frequencies were greatest for the 163-bp allele in Criollo cattle from Cerocahui, Chinipas, Morales, and Tamaulipas (0.23 to 0.5). Cattle from Guachochi had an allele frequency of 0.38 for the 151-bp allele, and cattle from Temoris had an allele frequency of 0.25 for the 149- and 167-bp alleles, with no 163-bp allele. Amplification with HEL9 produced 12 alleles (145, 149 to 169 bp) and showed common high-frequency alleles at 149, 157, and 159 bp for animals from all regions. The Chinipas population showed a moderate allele frequency at 145 bp; no other regions contained this allele. For INRA063 there were five alleles with 182 and 184 bp in low frequency. For BM2113 there were 10 alleles in the Criollo cattle (125 to 143 bp), with an equal distribution of frequencies for all alleles. In two regions, Guachochi and Morelos, genotypic frequencies deviated from Hardy-Weinberg equilibrium. Cattle from the Temoris region were genetically most distant from Criollo cattle of the ether five regions MH - Mexico|Chihuahua MH - USA PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000089071500013 L2 - genetic analysis;genetic variation;microsatellites;MICROSATELLITE LOCI; LINKAGE MAP; DNA; POLYMORPHISMS; DISTANCE; MARKERS SO - Journal of Animal Science 2000 ;78(9):2314-2322 1756 UI - 15047 AU - Russo RE AU - gado-Lezama R AU - Hounsgaard J AD - Univ Copenhagen, Panum Inst, Dept Med Physiol, DK-2200 Copenhagen N, DenmarkIPN, CINVESTAV, Dept Physiol, Mexico City, DF, MexicoFac Ciencias, Unidad Asociada Neurofisiol, Montevideo, UruguayHounsgaard, J, Univ Copenhagen, Panum Inst, Dept Med Physiol, Blegdamsvej 3, DK-2200 Copenhagen N, Denmark TI - Dorsal root potential produced by a TTX-insensitive micro-circuitry in the turtle spinal cord AB - 1. The mechanisms underlying the dorsal root potential (DRP) were studied in transverse slices of turtle spinal cord. DRPs were evoked by stimulating one filament in a dorsal root and were recorded from another such filament. 2. The DRP evoked at supramaximal stimulus intensity was reduced but not eliminated after blockade of GABA(A) receptors. The remaining component was eliminated by blocking NMDA and AMPA receptors. 3. The DRP was reduced but not eliminated after blockade of AMPA receptors. The early component of the remaining DRP was dependent on GABA(A) receptors and the residual component on NMDA receptors. 4. The DRP was reduced but not eliminated by TTX. GABA(A), NMDA and AMPA receptors contributed to the generation of the TTX-insensitive DRP. The early component of the DRP in the presence of TTX depended on GABA(A) receptor activation, and the late component mainly on the activation of NMDA receptors. 5. Our results show that part of the DRP is generated by a TTX-resistant, probably non-spiking micro-circuit with separate components mediated by GABA and glutamate MH - Denmark MH - Mexico|Distrito Federal MH - Uruguay PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 8 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000089949400013 L2 - TETRODOTOXIN-RESISTANT SODIUM; SENSORY NEURONS; OLFACTORY-BULB; HORN; SYNAPSES; GABA; DEPOLARIZATION; LOCALIZATION; ANTAGONISTS; INHIBITION SO - Journal of Physiology-London 2000 ;528(1):115-122 1757 UI - 14692 AU - Rzedowski-Calderon M AU - Villa-Salvador G AU - Madan ML AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoOhio State Univ, Dept Math, Columbus, OH 43210, USA TI - Galois module structure of holomorphic differentials AB - For a finite cyclic p extension L/K of a rational function field K = k(x) over an algebraically closed field k of characteristic p > 0 such that every ramified prime divisor is fully ramified, we find a basis of the k[G]-module Omega (L)(0) of holomorphic differentials of L. We use this basis, which is similar to the Boseck-Garcia basis in the elementary abelian case, to find the k[G]-module structure of Omega (L)(0) in terms of indecomposable modules MH - Mexico|Distrito Federal MH - USA PB - CANBERRA: AUSTRALIAN MATHEMATICS PUBL ASSOC INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0004-9727 UR - ISI:000165909200016 L2 - CHARACTERISTIC-P SO - Bulletin of the Australian Mathematical Society 2000 ;62(3):493-509 1758 UI - 14799 AU - Saavedra D AU - Cornejo L AU - de la Fuente B AU - Ortiz-Monasterio F AU - Muenke M AD - Hosp Dr Manuel Gea Giz, Mexico City, DF, MexicoAutonomous Hidalgo State Univ, Sch Med, Hlth Sci Inst, Pachuca De Soto, MexicoAutonomous Nuevo Leon Univ, Fac Med, Monterrey, MexicoNHGRI, Med Genet Brach, NIH, Bethesda, MD 20892, USA TI - Facial Clefting Syndrome: A new autosomal recessive entity in Mexican population MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|Hidalgo MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400700726 SO - American Journal of Human Genetics 2000 ;67(4):140-140 1759 UI - 15548 AU - Sabag SR AU - Edge BL AU - Soedigdo I AD - Texas A&M Univ, Dept Civil Engn, Ocean Engn Program, College Stn, TX 77843, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoFluor Daniel Inc, Sugar Land, TX 77478, USAEdge, BL, Texas A&M Univ, Dept Civil Engn, Ocean Engn Program, College Stn, TX 77843 USA TI - Wake II model for hydrodynamic forces on marine pipelines including waves and currents AB - The Wake LT model for the determination of the hydrodynamic forces on marine pipelines is extended to include currents and waves. There an two main differences between the Wake II and the traditional model. First, in the Wake II model the velocity is modified to include the pipe's encounter with the wake how when the velocity reverses. Second, the model uses time dependent drag and lift coefficients. The flow field is assumed to be the Linear superposition of regular waves and uniform current and is treated as wave only but in two different phases. The model requires eight empirical parameters that are obtained from comparisons with field data for various Keulegan-Carpenter numbers and current to wave ratios. The effective velocity and the force predictions are compared with field data from Exxon Production Research Company and with the conventional model. The model gives satisfactory results and predicts lift forces that in shape, magnitude and phase relative to the velocity are in very close agreement with measured forces. For the horizontal forces the results are very accurate. A substantial improvement is obtained over the predictions with the conventional model. This work is applicable to the design of submarine pipelines laying on the sea bottom in water depths where waves or waves and currents contribute to the hydrodynamic forces. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Civil;Engineering, Ocean;Oceanography;Water Resources U5 - J;Article AV - English IS - 0029-8018 UR - ISI:000088524600002 L2 - submarine pipelines;hydrodynamic forces;waves and currents;wake II model SO - Ocean Engineering 2000 ;27(12):1295-1319 1760 UI - 14526 AU - Saenz JM AU - Tellez A AU - de la Garza H AU - Reyes MDL AU - Contreras-Esquivel JC AU - Aguilar CN AD - Univ Autonoma Coahuila, Fac Chem Sci, Food Res Dept, Coahuila 25000, Saltillo, MexicoCSIC, Ctr Invest Biol, Barcelona, SpainUniv Autonoma Metropolitana Iztapalapa, CBS, Dept Biotechnol, Iztapalapa, MexicoUniv Nacl La Plata, Fac Exact Sci, CINDEFI, La Plata, ArgentinaAguilar, CN, Univ Autonoma Coahuila, Fac Chem Sci, Food Res Dept, Coah POB 252, Coahuila 25000, Saltillo, Mexico TI - Purification and some properties of pectinesterase from potato (Solanum tuberosum L.) alpha cultivar AB - Pectinesterase was extracted from potato alpha cultivar, purified and partially characterized The used protocol resulted in a 58.8-fold purification (51 850.2 units/mg protein) with 15.5% recovery of pectinesterase activity. The purified enzyme had a molecular weight of 27 kDa and its isoelectric point was around 4.5 with pH and temperature optima of 8.0 and 60 degreesC, respectively. The purified enzyme had a single symmetric peak of specific activity after chromatographic steps. The homogeneity of the purified pectinesterase was confirmed by gel filtration and polyacrylamide electrophoresis gel MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Coahuila MH - Spain PB - CURITIBA-PARANA: INST TECNOLOGIA PARANA RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0365-0979 UR - ISI:000166385700007 L2 - extraction;purification;properties;pectinesterase;potato;FICUS-AWKEOTSANG; PECTIN METHYLESTERASE; ORANGE; PAPAYA; FRUIT SO - Brazilian Archives of Biology and Technology 2000 ;43(4):393-398 1761 UI - 15162 AU - Sahagun-Flores JE AU - Bravo-Cuellar A AU - Celis A AU - Hernandez-Flores G AU - Orbach-Arbouys S AD - Hop Paul Brousse, Serv Pharm, F-94804 Villejuif, FranceUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoHop V Gomez Farias, Guadalajara, Jalisco, MexicoIMSS, CIBO, ISSSTE, Guadalajara, Jalisco, MexicoOrbach-Arbouys, S, Hop Paul Brousse, Serv Pharm, 14-16 Ave Paul Vaillant Couturier, F-94804 Villejuif, France TI - Elevated detection threshold for salty flavor in subjects with essential hypertension MH - France MH - Mexico|Jalisco PB - PARIS 06: MASSON EDITEUR RP - NOT IN FILE U3 - TC 1 U4 - Medicine, General & Internal U5 - J;Letter AV - French IS - 0755-4982 UR - ISI:000089565800004 SO - Presse Medicale 2000 ;29(26):1458-1458 1762 UI - 15867 AU - Sahu S AU - Bannur VM AD - Inst Plasma Res, Bhat 382428, Gandhinagar, IndiaSahu, S, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Circuito Exterior CU,A Postal 70-543, Mexico City 04510, DF, Mexico TI - Neutrino propagation in AGN environment AB - Assuming the violation of equivalence principle (VEP) by ultra high energy AGN neutrinos we study the effect of random magnetic field fluctuation on conversion of electron neutrinos to tau anti-neutrinos MH - India MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000087612300005 L2 - ACTIVE GALACTIC NUCLEI; EQUIVALENCE PRINCIPLE; RELATIVISTIC PROTONS; OSCILLATIONS; QUASARS; CONSTRAINTS; ASTRONOMY; VIOLATION; FIELDS SO - Modern Physics Letters A 2000 ;15(11-12):775-781 1763 UI - 16613 AU - Sahu S AU - Bannur VM AD - Inst Plasma Res, Bhat 382428, Gandhinagar, IndiaSahu, S, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Circuito Exterior CU,A Postal 70-543, Mexico City 04510, DF, Mexico TI - Effect of a random magnetic field on active-sterile neutrino conversion in the supernova core AB - The active-sterile neutrino conversion is studied for a neutrino propagating in the axial potential generated by a magnetized electron plasma in the supernova medium. We consider the effects of a random magnetic field B-rns on the average neutrino conversion probability. We obtain the constraint on Delta m(2) and sin(2)2 theta for different strengths of the random magnetic fields by considering the positive definiteness of the average neutrino conversion probability inside the supernova core. Our calculation shows that, to have Delta m(2)less than or similar to keV(2), a random magnetic field of B(rms)less than or similar to 0.63 x 10(14) G is preferable MH - India MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000084855600005 L2 - HOT DARK-MATTER; SOLAR; OSCILLATIONS; PROPAGATION; DENSITY; FERMION; MODELS SO - Physical Review D 2000 ;6102(2): 1764 UI - 14728 AU - Saint-Martin H AU - Hernandez-Cobos J AU - Bernal-Uruchurtu MI AU - Ortega-Blake I AU - Berendsen HJC AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Nancy 1, Inst Nanceien Chim Mol, CNRS UHP, UMR 7565, F-54506 Vandoeuvre Nancy, FranceRijksuniv Groningen, Dept Biophys Chem, NL-9747 AG Groningen, NetherlandsBIOSON Res Inst, NL-9747 AG Groningen, NetherlandsSaint-Martin, H, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - A mobile charge densities in harmonic oscillators (MCDHO) molecular model for numerical simulations: The water-water interaction AB - In this work we present a new proposal to model intermolecular interactions and use it for water molecules. The parameters of the model were fitted to reproduce the single molecule's electrostatic properties, a sample of 352 points in a refined ab initio single molecule deformation potential energy surface (PES), and the theoretical limit of the dimerization energy, -20.8 kJ/mol. The model was able to reproduce a sample of 180 additional points in the single molecule deformation PES, and 736 points in a pair-interaction surface computed at the MP2/aug-cc-pVQZ(') level with the counterpoise correction. Though the model reproduced the diagonal of the polarizability tensor, it could account for only 60% of the three-body nonadditive contributions to the interaction energies in 174 trimers computed at the MP2/6-311++(2d,2p) level with full counterpoise correction, but reproduced the four-body nonadditivities in 34 tetramers computed at the same level as the trimers. The model's predictions of the structures, energies, and dipoles of small clusters resulted in good agreement with experimental data and high quality ab initio calculations. The model also reproduced the second virial coefficient of steam at various temperatures, and the structure and thermodynamical properties of liquid water. We found that the short-range water-water interactions had a critical influence on the proper performance of the model. We also found that a model based on the proper intermolecular interactions requires the inclusion of intramolecular flexibility to be adequate. (C) 2000 American Institute of Physics. [S0021-9606(00)50847-2] MH - France MH - Mexico|Morelos MH - Netherlands PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 52 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Review AV - English IS - 0021-9606 UR - ISI:000165841300009 L2 - ROTATION TUNNELING SPECTROSCOPY; ELECTRONIC-STRUCTURE VARIATION; TERAHERTZ LASER SPECTROSCOPY; POTENTIAL-ENERGY SURFACE; AB-INITIO CALCULATIONS; REFINED MONTE-CARLO; GAUSSIAN-BASIS SETS; LIQUID WATER; DYNAMICS SIMULATION; WAVE-FUNCTIONS SO - Journal of Chemical Physics 2000 ;113(24):10899-10912 1765 UI - 16415 AU - Sala OE AU - Chapin FS AU - Armesto JJ AU - Berlow E AU - Bloomfield J AU - Dirzo R AU - Huber-Sanwald E AU - Huenneke LF AU - Jackson RB AU - Kinzig A AU - Leemans R AU - Lodge DM AU - Mooney HA AU - Oesterheld M AU - Poff NL AU - Sykes MT AU - Walker BH AU - Walker M AU - Wall DH AD - Univ Buenos Aires, Dept Ecol, RA-1417 Buenos Aires, DF, ArgentinaUniv Buenos Aires, Inst Invest Fisiol & Ecol Vinculadas Agr, Fac Agron, RA-1417 Buenos Aires, DF, ArgentinaUniv Alaska, Inst Arctic Biol, Fairbanks, AK 99775, USAUniv Alaska, Inst No Forest Cooperat Res, Fairbanks, AK 99775, USAUniv Chile, Fac Ciencias, Santiago, ChileUniv Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720, USAEnvironm Def Fund, New York, NY 10010, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoTech Univ Munich, Lehrstuhl Grunlandlehre, D-85350 Munich, GermanyNew Mexico State Univ, Dept Biol, Las Cruces, NM 88003, USADuke Univ, Dept Bot, Durham, NC 27708, USAArizona State Univ, Dept Biol, Tempe, AZ 85287, USANatl Inst Publ Hlth & Environm, NL-3720 BA Bilthoven, NetherlandsUniv Notre Dame, Dept Biol, Notre Dame, IN 46556, USAStanford Univ, Dept Biol Sci, Stanford, CA 94305, USAColorado State Univ, Dept Biol, Ft Collins, CO 80523, USAColorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523, USAUniv Lund, Ekologihuset, S-22362 Lund, SwedenCommonwealth Sci & Ind Res Org, Div Wildlife & Ecol, Canberra, ACT, AustraliaSala, OE, Univ Buenos Aires, Dept Ecol, Ave San Martin 4453, RA-1417 Buenos Aires, DF, Argentina TI - Biodiversity - Global biodiversity scenarios for the year 2100 AB - Scenarios of changes in biodiversity for the year 2100 can now be developed based on scenarios of changes in atmospheric carbon dioxide, climate, vegetation, and Land use and the known sensitivity of biodiversity to these changes. This study identified a ranking of the importance of drivers of change, a ranking of the biomes with respect to expected changes, and the major sources of uncertainties. For terrestrial ecosystems, land-use change probably wilt have the largest effect, followed by climate change, nitrogen deposition, biotic exchange, and elevated carbon dioxide concentration. For freshwater ecosystems, biotic exchange is much more important. Mediterranean climate and grassland ecosystems likely will experience the greatest proportional change in biodiversity because of the substantial influence of all drivers of biodiversity change. Northern temperate ecosystems are estimated to experience the least biodiversity change because major land-use change has already occurred. Plausible changes in biodiversity in other biomes depend on interactions among the causes of biodiversity change. These interactions represent one of the largest uncertainties in projections of future biodiversity change MH - Argentina MH - Australia MH - Chile MH - Germany MH - Mexico|Distrito Federal MH - Netherlands MH - Sweden MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 597 U4 - Multidisciplinary Sciences U5 - J;Review AV - English IS - 0036-8075 UR - ISI:000085775300030 L2 - FRESH-WATER; THREATS; CO2; LIMITATION; FUTURE SO - Science 2000 ;287(5459):1770-1774 1766 UI - 16261 AU - Salamanca MAO AU - Ruvalcaba-Sil JL AU - Bucio L AU - Manzanilla L AU - Miranda J AD - Ctr Nacl Aceleradores, E-41092 Seville, SpainUniv Sevilla, Dpto Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Antropol, Mexico City 04510, DF, MexicoSalamanca, MAO, Ctr Nacl Aceleradores, Parque Tecnol Cartuja 93,Avda Thomas A Edison, E-41092 Seville, Spain TI - Ion beam analysis of pottery from Teotihuacan, Mexico AB - This work presents the characterization of sherds and pottery paints from Teotihuacan. Mexico, belonging to the Mesoamerican Epiclassic (700-900 AD) and Postclassic (900-1521 AD) periods. A simultaneous analysis by Particle Induced X-ray Emission (PIXE) and Rutherford Backscattering Spectroscopy (RBS) was carried out to measure the elemental composition of pottery and clays sources of the Teotihuacan region. Also, a semiquantitative X-Ray Diffraction study (XRD) was performed to determine the mineralogical phases. From elemental and mineralogical composition, groups of local and foreign sherds were established. Results showed that the PIXE-RBS method combined with XRD proved to be a very powerful and general procedure for archaeological characterization. Moreover, non-vacuum differential PIXE analysis was carried out on colored regions of some representative vessels to study the layered structure of the paints-clay system. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000086204100145 L2 - PIXE;RBS;XRD;archaeology;pottery;pigments;Teotihuacan;Epiclassic;Postclassic;PIXE SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2000 ;161():762-768 1767 UI - 15687 AU - Salas-Alanis JC AU - maya-Guerra M AU - McGrath JA AD - St Thomas Hosp, St Johns Inst Dermatol, Dept Cell & Mol Pathol, Sch Med, London SE1 7EH, EnglandGuys Kings Coll, St Johns Inst Dermatol, Dept Cell & Mol Pathol, London SE1 7EH, EnglandUniv Autonoma Nuevo Leon, Med Serv, Monterrey, MexicoMcGrath, JA, St Thomas Hosp, St Johns Inst Dermatol, Dept Cell & Mol Pathol, Sch Med, Lambeth Palace Rd, London SE1 7EH, England TI - The molecular basis of dystrophic epidermolysis bullosa in Mexico AB - Background Type VII collagen gene (COL7A1) mutations are the cause of dystrophic epidermolysis bullosa (DEB), but most mutations are specific to individual families, and there are limited data on the nature of COL7A1 mutations in certain ethnic populations. Objective To determine the molecular basis of DEB in Hispanic Mexican patients. Methods Patients were recruited through a newly established support group, Fundacion DEBRA Mexico. Molecular analysis was performed by polymerase chain reaction (PCR) of genomic DNA using COL7A1-specific primers, heteroduplex analysis, and direct nucleotide sequencing. Results Fifty-nine of a possible 67 COL7A1 mutations (88%) were identified in 36 affected individuals (31 recessive, five dominant) in 21 families. Recessive mutations included six frameshift mutations, four silent glycine substitutions, and two splice-site mutations. Dominant mutations comprised a de novo glycine substitution and an internal deletion. Conclusions This study establishes the molecular basis of DEB in a group of Mexican patients. Only two of the mutations have been identified previously in other ethnic groups; the remainder are specific to this population. These new data are helpful in facilitating the accurate diagnosis of DEB subtype, in improving genetic counseling, and in providing further insight into the pathophysiology of this mechanobullous disease MH - United Kingdom MH - Mexico|Nuevo Leon PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Dermatology U5 - J;Article AV - English IS - 0011-9059 UR - ISI:000088110600005 L2 - VII COLLAGEN GENE; GLYCINE SUBSTITUTION MUTATIONS; SENSITIVE GEL-ELECTROPHORESIS; FRAMESHIFT MUTATIONS; PHENOTYPIC SEVERITY; MISSENSE MUTATION; COL7A1 GENE; DOMINANT; IDENTIFICATION; DELETION SO - International Journal of Dermatology 2000 ;39(6):436-442 1768 UI - 16690 AU - Salazar-Garcia S AU - Lovatt CJ AD - Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521, USASalazar-Garcia, S, INIFAP, Campo Expt Santiago Ixcuintla, Apdo Postal 100, Santiago Ixcuintla 63300, NAY, Mexico TI - Use of GA(3) to manipulate flowering and yield of 'Hass' avocado AB - Avocado trees (Persea americana Mill.) bearing a heavy crop produce a light "off' bloom the next spring. This results in a light crop and a subsequent intense "on" bloom the year after. The objective of the study was to quantify the effects of GA(3) canopy sprays applied to 'Hass' avocado trees during the months preceding an "off' or "on" bloom on inflorescence and vegetative shoot number and yield. The experiment was initiated approximately seven months before an anticipated "off' bloom in an attempt to increase flowering intensity:and yield. GA(3) (25 or 100 mg.L-1) was applied to separate sets of trees in September (early stage of inflorescence initiation), November (early stage of inflorescence development), January (initial development of the perianth of terminal flowers), March (cauliflower stage of inflorescence development; only 25 mg.L-1), or monthly from September through January (only 25 mg.L-1). Control trees did not receive any treatment. GA(3) (100 mg.L-1) applied in September reduced inflorescence number in both years, but not yield. GA(3) (25 or 100 mg.L-1) applied in November before the "on" bloom reduced inflorescence number with a concomitant increase in vegetative shoot number and 47% yield reduction compared to control trees. This treatment might provide avocado growers with a tool to break the alternate bearing cycle by reducing yield in an expected "on" crop year to achieve a higher yield the following year. GA(3) (25 mg.L-1) applied in November or January stimulated early development of the vegetative shoot of indeterminate inflorescences. January and March applications did not affect the number of flowering or vegetative shoots produced either year. GA(3) (25 mg.L-1) applied in March at the start of an "off' bloom increased 2-fold the production of commercially valuable fruit (213 to 269 g per fruit) compared to the control MH - Mexico|Nayarit MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Horticulture U5 - J;Article AV - English IS - 0003-1062 UR - ISI:000084271100004 L2 - Persea americana;inflorescences;fruit size;fruit quality;phenology;alternate bearing;growth regulation SO - Journal of the American Society for Horticultural Science 2000 ;125(1):25-30 1769 UI - 16699 AU - Salazar AR AU - Haldar A AD - Univ Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721, USAUAS, Fac Ingn, Culiacan, Sinaloa, MexicoHaldar, A, Univ Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721 USA TI - Structural responses considering the vertical component of earthquakes AB - The guidelines in the NEHRP Provisions and the Mexican Code regarding the effects of the vertical component of earthquakes on the response of frames are re-evaluated. Using a time domain nonlinear finite element program developed by the authors, the seismic responses of frames are evaluated realistically by simultaneously applying the horizontal and vertical components of earthquake motion. Three steel frames and 13 recorded earthquake motions are considered. The same response parameters are then estimated using the two codes, and their error is evaluated. It is found that, if the frames remain elastic, the NEHRP Provisions estimate the maximum horizontal deflection at the top of the frames and the bending moment in the columns very accurately; the Mexican Code overestimates them. If the frames develop plastic hinges, the Mexican Code conservatively overestimates them, but the NEHRP Provisions underestimate them in some cases. Both codes significantly underestimate the axial loads in columns. The underestimation increases as the frames develop plastic hinges. The underestimation is more for interior columns than for exterior columns. If the ratio R of the PGA of the vertical and horizontal components of an earthquake is higher than normal, the underestimation increases as R increases. The underestimation is not correlated with frame height. The vertical component may increase the axial load significantly. Since they are designed as beam-columns, the increase in the axial load will have a very detrimental effect on the performance of the columns. In light of the results obtained in this study, the design requirements for the vertical components need modification. At the very least, further study is required. (C) 1999 Elsevier Science Ltd. All rights reserved MH - Mexico|Sinaloa MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Interdisciplinary Applications;Engineering, Civil U5 - J;Article AV - English IS - 0045-7949 UR - ISI:000083541800002 L2 - seismic response;seismic design;steel frames;load combinations;design criteria;lateral deflection;vertical acceleration SO - Computers & Structures 2000 ;74(2):131-145 1770 UI - 15963 AU - Salazar MT AU - Smith TK AU - Harris A AD - Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Programa Maricultura, Monterey, Nuevo Leon, MexicoSmith, TK, Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, Canada TI - High-performance liquid chromatographic method for determination of biogenic amines in feedstuffs, complete feeds, and animal tissues AB - Numerous methods to analyze biogenic amines in biological materials have been described. A versatile and rapid methodology to analyze these compounds in feedstuffs, complete feeds, and animal tissues, however, has not been reported. The current method was developed to address this need. Biogenic amines in feedstuffs, complete animal feeds, and animal tissues were extracted with 10% trichloroacetic acid, reacted with O-phthaladehyde using high-performance liquid chromatographic employing a cation exchange column. Detection limits were 50 pmol/mL for tyramine, histamine, putrescine, and spermine; 40 pmol/mL for cadaverine; and 25 pmol/mL for spermidine. Extraction efficiency of biogenic amines in feedstuffs, duodenum, liver, ileum + jejunum, and whale shrimp and shrimp hepatopancreas ranged between 99-105, 93-135, 80-85, 65-102, 88-98, and 88-97%, respectively. It can be concluded that the current method can be applied to individual feedstuffs, complete feeds, and animal tissues for the rapid and accurate determination of concentration of biogenic amines MH - Canada MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000087116000047 L2 - high-performance liquid chromatographic;biogenic amines;feedstuffs;complete feeds;animal tissues;FISH-MEAL; POLYAMINES; SEPARATION; GROWTH; FOODS SO - Journal of Agricultural and Food Chemistry 2000 ;48(5):1708-1712 1771 UI - 16097 AU - Salgado-Maldonado G AU - Santos CP AD - Natl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Santa Ursula, Inst Ciencias Biol & Ambientais, BR-22231040 Rio De Janeiro, BrazilSalgado-Maldonado, G, Natl Autonomous Univ Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Amapacanthus amazonicus n. g., n. sp (Acanthocephala : Diplosentidae : Allorhadinorhynchinae) from Arius passany and Anableps microleps (Pisces) at Maraca Island off northern Brazil AB - Amapacanthus amazonicus n. g., n. sp. is described from the intestine of Arius passany (Valenciennes) and Anableps microleps Muller. The most important diagnostic features are: a small globular proboscis armed with 6 diagonal rows of 3 stout hooks; middle hooks conspicuously stouter and larger than anterior ones; terminal hooks as long as middle hooks but straighter and more slender; a double-walled proboscis receptacle; a trunk bearing spines anteriorly; and two tubular cement glands in the males. Amapacanthus n. g. is differentiated from Allorhadinorhynchus, Golvanorhynchus and Slendrorhynchus, the other genera of the Allorhadinorhynchinae, by the presence of a globular proboscis armed with a small number (18) of hooks. A key to the species of the Allorhadinorhynchinae is presented MH - Brazil MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Parasitology U5 - J;Article AV - English IS - 0165-5752 UR - ISI:000086631000005 SO - Systematic Parasitology 2000 ;46(2):111-116 1772 UI - 15859 AU - Salgado H AU - Moreno-Hagelsieb G AU - Smith TF AU - Collado-Vides J AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62100, Morelos, MexicoBoston Univ, Biomol Engn Res Ctr, Boston, MA 02115, USACollado-Vides, J, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, AP 565 A, Cuernavaca 62100, Morelos, Mexico TI - Operons in Escherichia coli: Genomic analyses and predictions AB - The rich knowledge of operon organization in Escherichia coli, together with the completed chromosomal sequence of this bacterium, enabled us to perform an analysis of distances between genes and of functional relationships of adjacent genes in the same operon, as opposed to adjacent genes in different transcription units. We measured and demonstrated the expected tendencies of genes within operons to have much shorter intergenic distances than genes at the borders of transcription units. A clear peak at short distances between genes in the same operon contrasts with a flat frequency distribution of genes at the borders of transcription units. Also, genes in the same operon tend to have the same physiological functional class. The results of these analyses were used to implement a method to predict the genomic organization of genes into transcription units, The method has a maximum accuracy of 88% correct identification of pairs of adjacent genes to be in an operon, or at the borders of transcription units, and correctly identifies around 75% of the known transcription units when used to predict the transcription unit organization of the E, coli genome. Based on the frequency distance distributions, we estimated a total of 630 to 700 operons in E, coli, This step opens the possibility of predicting operon organization in other bacteria whose genome sequences have been finished MH - Mexico|Morelos MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 114 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000087526300076 L2 - TRANSCRIPTIONAL REGULATION; SELFISH OPERONS; GENE CLUSTERS; K-12; PROTEINS; CONSERVATION; EVOLUTION; REGULONDB; SEQUENCE; DATABASE SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(12):6652-6657 1773 UI - 16614 AU - Salgado H AU - Santos-Zavaleta A AU - Gama-Castro S AU - Millan-Zarate D AU - Blattner FR AU - Collado-Vides J AD - UNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca 62100, Morelos, MexicoUniv Wisconsin, Dept Genet, Madison, WI 53706, USACollado-Vides, J, UNAM, Ctr Invest Fijac Nitrogeno, AP 565-A, Cuernavaca 62100, Morelos, Mexico TI - RegulonDB (version 3.0): transcriptional regulation and operon organization in Escherichia coli K-12 AB - RegulonDB is a database on transcription regulation and operon organization in Escherichia coli, The current version describes regulatory signals of transcription initiation, promoters, regulatory binding sites of specific regulators, ribosome binding sites and terminators, as well as information on genes clustered tin operons, These specific annotations have been gathered from a constant search in the literature, as well as based on computational sequence predictions, The genomic coordinates of all these objects in the E.coli K-12 chromosome are clearly indicated. Every known object has a link to at least one MEDLINE reference. We have also added direct links to recent expression data of E.coli K-12. The version presented here has important modifications both in the structure of the database, as well as in the amount and type of information encoded in the database. RegulonDB can be accessed on the web at URL:http://www.cifn.unam.mx/Computational_Biology/regulondb/ MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 35 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000084896300016 L2 - COMPLETE GENOME SEQUENCE; PFL OPERON; PREDICTION SO - Nucleic Acids Research 2000 ;28(1):65-67 1774 UI - 14545 AU - Salgado S AU - Garcia J AU - Vera J AU - Siller F AU - Bueno M AU - Miranda A AU - Segura A AU - Grijalva G AU - Segura J AU - Orozco H AU - Hernandez-Pando R AU - Fafutis M AU - Aguilar LK AU - guilar-Cordova E AU - rmendariz-Borunda J AD - Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Guadalajara 44281, Jalisco, MexicoHarvard Univ, Gene Therapy Initiat, Boston, MA 02115, USAInst Nacl Nutr Salvador Zubiran, Guadalajara, Jalisco, MexicoInst Dermatol Guadalajara, Guadalajara, Jalisco, MexicoArmendariz-Borunda, J, Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Apdo Postal 2-123, Guadalajara 44281, Jalisco, Mexico TI - Liver cirrhosis is reverted by urokinase-type plasminogen activator gene therapy AB - Liver cirrhosis represents a worldwide health problem and is a major cause of mortality. Cirrhosis is the result of extensive hepatocyte death and fibrosis induced by chronic alcohol abuse and hepatitis B and C viruses. Successful gene therapy approaches to this disease may require both reversal of fibrosis and stimulation of hepatocyte growth. Urokinase-type plasminogen activator (uPA) may serve this function, as it is an initiator of the matrix proteolysis cascade and induces hepatocyte growth factor expression. In a rat cirrhosis model, a single iv administration of a replication-deficient adenoviral vector encoding a nonsecreted form of human uPA resulted in high production of functional uPA protein in the liver. This led to induction of collagenase expression and reversal of fibrosis with concomitant hepatocyte and improved liver function. Thus, uPA gene therapy may be an effective strategy for treating cirrhosis in humans MH - Mexico|Jalisco MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 41 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1525-0016 UR - ISI:000166225100005 L2 - experimental cirrhosis;hepatic regeneration;adenovirus;vector;gene therapy;metalloproteinases;HEPATOCYTE GROWTH-FACTOR; ADULT-RAT LIVER; EXPRESSION; REGENERATION; METALLOPROTEINASES; COLLAGENASE; RECEPTOR; RNA; HGF SO - Molecular Therapy 2000 ;2(6):545-551 1775 UI - 15847 AU - Salin-Pascual RJ AU - Upadahyay U AU - Wagner D AU - Greco MA AU - Shiromani P AD - W Roxbury VA Med Ctr, Mol Sleep Lab, W Roxbury, MA 02132, USAHarvard Univ, Sch Med, W Roxbury, MA 02132, USAUniv Nacl Autonoma Mexico, Fac Med, Dept Physiol, Mexico City 04510, DF, Mexico TI - Caffeine disrupts sleep in old rats when compared to young rats MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0006-3223 UR - ISI:000086515200462 SO - Biological Psychiatry 2000 ;47(8):142S-142S 1776 UI - 16395 AU - Salinas E AU - Romo R AD - Salk Inst Biol Studies, Howard Hughes Med Inst, Computat Neurobiol Lab, La Jolla, CA 92037, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoSalinas, E, Salk Inst Biol Studies, Howard Hughes Med Inst, Computat Neurobiol Lab, La Jolla, CA 92037 USA TI - Neurobiology - A chorus line MH - USA MH - Mexico|Distrito Federal PB - LONDON: MACMILLAN MAGAZINES LTD RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0028-0836 UR - ISI:000085870900028 SO - Nature 2000 ;404(6774):131-+ 1777 UI - 16615 AU - Salinas E AU - Abbott LF AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoBrandeis Univ, Volen Ctr Complex Syst, Waltham, MA 02254, USABrandeis Univ, Dept Biol, Waltham, MA 02254, USASalinas, E, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Ciudad Univ S-N, Mexico City 04510, DF, Mexico TI - Do simple cells in primary visual cortex form a tight frame? AB - Sets of neuronal tuning curves, which describe the responses of neurons as functions of a stimulus, can serve as a basis for approximating other functions of stimulus parameters. In a function-approximating network, synaptic weights determined by a correlation-based Hebbian rule are closely related to the coefficients that result when a function is expanded in an orthogonal basis. Although neuronal tuning curves typically are not orthogonal functions, the relationship between function approximation and correlation-based synaptic weights can be retained if the tuning curves satisfy the conditions of a tight frame. We examine whether the spatial receptive fields of simple cells in cat and monkey primary visual cortex (V1) form a tight frame, allowing them to serve as a basis for constructing more complicated extrastriate receptive fields using correlation-based synaptic weights. Our calculations show that the set of V1 simple cell receptive fields is not tight enough to account for the acuity observed psychophysically MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: M I T PRESS RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0899-7667 UR - ISI:000084864300005 L2 - STRIATE-CORTEX; SPATIAL-FREQUENCY; CONTRAST SENSITIVITY; NATURAL IMAGES; CAT RETINA; STATISTICS; NETWORKS; COLUMNS SO - Neural Computation 2000 ;12(2):313-335 1778 UI - 14561 AU - Samuel AM AU - Pennors A AU - Villeneuve C AU - Samuel FH AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, Gen Motors Powertrain, Mat Engn, Milford, NH 03055, USACorp Nemak SA CV, Res & Dev, Garza Garcia 66221, NL, MexicoSamuel, FH, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Effect of cooling rate and Sr-modification on porosity and Fe-intermetallics formation in Al-6.5% Si-3.5% Cu-Fe alloys AB - Together with porosity, the problems created by the formation of iron intermetallics in Al-Si alloys pose serious concerns in regard to their use in structural components. The presence of these intermetallics, particularly the brittle beta -Al5FeSi phase, tends to reduce the alloy properties and casting quality. In order to optimise the iron intermetallics in Al-6.5% Si-3.5% Cu-Fe alloys, the effects of cooling rate, Sr modification, other melt additions, and heat treatment were studied, with a view to determining the means of their formation and dissolution, in relation to their effect on porosity formation and alloy properties. The iron levels selected for study were 0.5%, 1.0% and 1.5%, covering the range of levels normally observed in foundry alloys. Castings were prepared using a cooling fin sand mould (DAS range: 25-85 mum) for microstructural analysis, and a Stahl permanent mould for tensile testing purposes. Samples of molten metal quenched in cold water provided much smaller DASs. Microstructural characterisation was carried out using optical microscopy and thermal, image and electron microprobe analyses. Tensile properties (T6 condition) were determined at room temperature and a strain rate of 4 x 10(-4)/s using an Instron Universal testing machine. The results show that at any Fe level, the average beta -Al5FeSi platelet length is strongly determined by the DAS. Strontium (250-350 ppm) is effective in reducing the beta -platelet size through its fragmentation/dissolution effect on the latter. At higher Sr concentrations, both coarsening of the beta -platelets (i.e., "overmodification") and their decomposition (through Si rejection ahead of the platelets) occur. Addition of P increases beta -phase formation (due to the presence of AlP particles that act as possible nucleation sites). Melt superheating (900 degreesC) thereafter reduces the effect. At Fe levels of 1% or more, alpha -Chinese script or sludge particles form only at slow cooling rates or with superheating. Tensile properties of alloys containing up to 1% Fe are improved with Mn, Mn + Cr, Sr or Be additions. Best overall properties are achieved with Mn at Mn/Fe = 0.7. Also, Sr additions of 200-300 ppm are best, higher levels giving rise to increased porosity levels and, hence, lower properties. For a given Fe level, the optimum Sr concentration depends on the cooling rate and Si content of the alloy. Iron levels of 1.5% are not recommended for Al-6.5% Si-3.5% Cu (319.2) alloys as the properties cannot be improved by any of the above means MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - SHEFFIELD: CASTINGS DEVELOPMENT CENTRE RP - NOT IN FILE U3 - TC 11 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000166252700006 L2 - cooling rate;Sr modification;porosity;Fe-intermetallics;Al-Si-Cu-Fe alloys;hear treatment;BETA-AL5FESI PHASE; CR; CO SO - International Journal of Cast Metals Research 2000 ;13(4):231-253 1779 UI - 14718 AU - Sanches IS AU - Mato R AU - de Lencastre H AU - Tomasz A AD - Rockefeller Univ, New York, NY 10021, USAUniv Nova Lisboa, Inst Tecnol Quim & Biol, P-2780 Oeiras, PortugalUniv Nova Lisboa, Fac Ciencias & Tecnol, P-2825 Monte De Caparica, PortugalInst Adolfo Lutz, Bacteriol Branch, Sao Paulo, BrazilInst Nacl Salud, Microbiol Grp, Bogota, ColombiaUniv Milan, Inst Med Microbiol, Milan, ItalyInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoInst Salud Publ Chile, Santiago, ChileMinist Salud, Lab Salud Publ, Montevideo, UruguaySera & Vaccines Cent Res Lab, Warsaw, PolandNanjing Med Univ, Teaching Hosp 1, Affiliated Hosp 1, Nanjing, Peoples R ChinaTokyo Womens Med Coll, Tokyo 162, JapanB Johan Natl Inst Hyg, Budapest, HungaryNatl Univ Hosp, Reykjavik, IcelandHosp Princeps Espanya, Barcelona, SpainInst Nacl Enfermedades Infecciosas ANLIS Dr Carlo, Buenos Aires, DF, ArgentinaMil Med Acad, Sofia, BulgariaCharles Univ, Fac Med 3, Prague, Czech RepublicUniv La Sapienza, Rome, ItalyUniv Naples Federico II, Ist Igiene & Med Prevent, Naples, ItalyUniv Copenhagen, Hvidovre Hosp, DK-2650 Hvidovre, DenmarkNatl Def Med Ctr, Tri Serv Gen Hosp, Taipei, TaiwanTomasz, A, Rockefeller Univ, 1230 York Ave, New York, NY 10021, USA TI - Patterns of multidrug resistance among methicillin-resistant hospital isolates of coagulase-positive and coagulase-negative staphylococci collected in the International Multicenter Study RESIST in 1997 and 1998 AB - The primary purpose of the multicenter international study "RESIST" was to obtain an update on the degree of multidrug resistance among methicillin-resistant staphylococci collected from a geographically diverse sample. A total of 3,307 staphylococcal isolates were recovered from single patients and primarily from clinical specimens that were collected at 20 collaborating regional health centers located in several countries in Europe, Asia, and Latin America during a 3- to 4-month period each in 1997 and 1998, All strains were deposited at the Laboratory of Molecular Genetics at ITQB/UNL in Oeiras, Portugal, for quality control and for testing by microbiological and molecular typing techniques; the Laboratory of Microbiology at The Rockefeller University serving as organizational center. The majority of strains, 3,100, were methicillin-resistant, of which 1,749 were coagulase positive (methicillin-resistant Staphylococcus aureus, MRSA), and 1,351 were coagulase negative (methicillin-resistant coagulase negative staphylococci, MRCNS). The overall frequency of drug resistance traits among the 1,749 MRSA strains was high (over 70% and up to and over 90% of the strains) to ciprofloxacin, erythromycin, clindamycin, gentamicin, and tetracycline, and was somewhat less frequent to sulfamethoxazole-trimethoprim (45%), chloramphenicol (30%), and rifampin (38%). None of the 3,307 staphylococcal isolates showed reduced susceptibility to vancomycin except for a single methicillin-resistant coagulase-negative isolate. The great majority of staphylococci were also susceptible to the new antimicrobial Synercid, In contrast, resistance to teicoplanin was significant among methicillin-resistant strains of coagulase-negative staphylococci, particularly among Staphylococcus haemolyticus. MRSA isolates showed marked geographic variation in their patterns of multiresistance, most likely reflecting the properties of unique multiresistant MRSA clones dominant in the hospitals that provided the MRSA isolates from the various geographic areas. The multiresistance patterns of MRSA strains and strains of methicillin-resistant coagulase-negative staphylococci originating at the same country source also showed striking differences, suggesting that resistance to antimicrobial agents emerged under different antibiotic pressures in these bacterial species MH - Argentina MH - Brazil MH - Bulgaria MH - Chile MH - Colombia MH - Czech Republic MH - Denmark MH - Hungary MH - Iceland MH - Italy MH - Japan MH - Mexico|Morelos MH - Peoples R China MH - Poland MH - Portugal MH - Spain MH - Taiwan MH - Uruguay MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 16 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1076-6294 UR - ISI:000165784600003 L2 - VANCOMYCIN RESISTANCE; AUREUS CLONE; SPREAD; BACTERIA SO - Microbial Drug Resistance-Mechanisms Epidemiology and Disease 2000 ;6(3):199-211 1780 UI - 15305 AU - Sanchez-Alavez M AU - Criado J AU - Gomez-Chavarin M AU - Jimenez-Anguiano A AU - Navarro L AU - az-Ruiz O AU - Galicia O AU - Sanchez-Narvaez F AU - Murillo-Rodriguez E AU - Henriksen SJ AU - Elder JH AU - Prospero-Garcia O AD - UNAM, Fac Med, Dept Fisiol, Neurosci Grp, Mexico City, DF, MexicoScripps Res Inst, Dept Neuropharmacol, La Jolla, CA, USAScripps Res Inst, Dept Mol Biol, La Jolla, CA, USASanchez-Alavez, M, UNAM, Fac Med, Dept Fisiol, Neurosci Grp, Mexico City, DF, Mexico TI - HIV- and FIV-derived gp120 alter spatial memory, LTP, and sleep in rats AB - Human immunodeficiency virus (HIV)-associated dementia (HAD) has been detected in 20-30% of patients suffering AIDS. The envelope glycoprotein 120 (gp720) derived from HIV seems to play a critical role in the pathophysiology of this dementia. Likewise, the feline immunodeficiency virus (FIV)-derived gp120 causes neurological and electrophysiological abnormalitites in cats. We have studied the effects of gp120 derived from HIV or FIV on learning and memory processing, hippocampal long-term potentiation (LTP), hippocampal neuronal cAMP production, the sleep-waking cycle, and locomotor activity and equilibrium in rats. Results showed that while both HIV- and FIV-gp120 impaired the mt's performance in the Barnes maze task, only HIVgp120 impaired the induction and maintenance of LTP. However, both glycoproteins induced a significant decrease in the posttetanic potentiation. HIVgp120 also caused a significant reduction in cAMP production in the hippocampus. Regarding the sleep-waking cycle, HIV- and FIV-gp120 increased the waking state and slow-wave sleep 1 (SWS1), while decreasing both SWS2 and REM sleep. Locomotor activity and equilibrium were significantly altered by these glycoproteins. These results suggest that HIVgp120 causes neurophysiological abnormalities and therefore may facilitate HAD development in AIDS patients. (C) 2000 Academic Press MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 14 U4 - Neurosciences U5 - J;Article AV - English IS - 0969-9961 UR - ISI:000089076000015 L2 - AIDS;memory;LTP;locomotor activity;cAMP;dementia;FELINE IMMUNODEFICIENCY VIRUS; LONG-TERM POTENTIATION; CENTRAL-NERVOUS-SYSTEM; ENVELOPE PROTEIN GP120; TRANSGENIC MICE; CEREBROSPINAL-FLUID; RECEPTOR ANTAGONIST; INFECTION; DEMENTIA; AIDS SO - Neurobiology of Disease 2000 ;7(4):384-394 1781 UI - 16122 AU - Sanchez-Armass S AU - Shankar SC AU - Rojas JD AU - Martinez-Zaguilan R AD - Texas Tech Univ, Hlth Sci Ctr, SW Canc Ctr, Lubbock, TX 79430, USATexas Tech Univ, Hlth Sci Ctr, Dept Physiol, Lubbock, TX 79430, USAUniv San Luis Potosi, Fac Med, San Luis Potosi 78230, Mexico TI - Cytosolic pH (pHcyt)gradients in neuroblastoma and glioma cell lines studied by confocal/spectral imaging microscopy MH - Mexico|San Luis Potosi MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918102064 SO - Faseb Journal 2000 ;14(4):A357-A357 1782 UI - 15762 AU - Sanchez-Buenfil E AU - Quiroz-Mercado H AU - Guerrero-Naranjo JL AU - randa-Rabago J AU - Marcellino G AU - Luloh P AD - Hosp Dr Luis SAnchez Bulnes, Mexico City, DF, MexicoUNAM, Mexico City, DF, MexicoCoherent Med Med Grp, Santa Clara, CA, USAInsight Instruments Inc, Sanford, FL, USA TI - Viscoelastic foveal detachment and endoscopic subretinal laser ablation of subfoveal choroidal neovascularization MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246700953 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S183-S183 1783 UI - 15754 AU - Sanchez-Chapula JA AU - Sanguinetti MC AD - Univ Colima, CUIB, Unidad Invest Carlos Mendez, Colima 28040, Col, MexicoUniv Utah, Dept Med, Div Cardiol, Salt Lake City, UT 84112, USASanchez-Chapula, JA, Univ Colima, CUIB, Unidad Invest Carlos Mendez, Apdo Postal 199, Colima 28040, Col, Mexico TI - Altered gating of HERG potassium channels by cobalt and lanthanum AB - Activation of the rapid, delayed rectifier K current (I-Kr) is important for normal repolarization of cardiac action potentials, especially in mammalian ventricular muscle. The study of this current has been greatly aided by the discovery that the human ether-a-go-go-related gene (HERG) encodes the pore-forming alpha subunits of these channels. As for other voltage-activated K+ channels, divalent and trivalent cations affect the gating of HERG channels by screening negative membrane surface charges or by direct interaction with the channel gating mechanism. Previous studies have reported that I-Kr Of myocytes, and HERG channels heterologously expressed in Xenopus oocytes, are reduced by external Co2+ and La3+. We have reinvestigated the "blocking" effect of Co2+ and La3+ on HERG channels expressed in Xenopus oocytes. At concentrations previously reported to block I-Kr or HERG current (I-HERG), Co2+ (10 mM) and La3+ (10 CIM) had only small effects on the magnitude of fully activated I-HERG The apparent block results from altered kinetics and voltage dependence of gating, similar to the effects of Ca2+ on HERG channels. Under control conditions, the half-points for voltage-dependent activation and inactivation of HERG were -35+/-2.1 and -76.3+/-1.7 mV, respectively. Co2+ and La3+ accelerated the rate of deactivation, decreased the rate of current activation, and shifted the half-point of the HERG channel activation curve by +53 and +65 mV, respectively. Co2+ Shifted the voltage dependence of inactivation by +14 mV, whereas La3+ had no effect. Co2+ also slowed the onset of I-HERG inactivation and accelerated the rate of recovery from inactivation. These results indicate that reduction of IHERG by Co2+ (10 mM) and La3+ (10 mu M) during depolarizing pulses is caused by a positive shift in the voltage dependence of activation, and does not result from pore block MH - Mexico|Colima MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Physiology U5 - J;Article AV - English IS - 0031-6768 UR - ISI:000087884600010 L2 - HERG;delayed rectifier;potassium current;voltage clamp;Xenopus oocytes;RECTIFIER K+ CURRENT; SQUID GIANT-AXONS; DELAYED RECTIFIER; I-KR; DIVALENT-CATIONS; EXTERNAL CA2+; VENTRICULAR MYOCYTES; CARDIAC-ARRHYTHMIA; XENOPUS OOCYTES; OUTWARD CURRENT SO - Pflugers Archiv-European Journal of Physiology 2000 ;440(2):264-274 1784 UI - 15751 AU - Sanchez-Cordero V AU - Martinez-Meyer E AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Kansas, Dept Geog, Lawrence, KS 66045, USAUniv Kansas, Kansas Appl Remote Sensing Program, Lawrence, KS 66045, USASanchez-Cordero, V, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Museum specimen data predict crop damage by tropical rodents AB - Museum collections constitute a massive store of information on biological diversity. We used museum specimen data to generate ecological niche models that provide predictions of geographic distributions of native rodent pest species and agricultural census data that summarize the geographic distribution of nine crops in the state of Veracruz. Mexico, as well as crop losses between planting and harvest. Herein, we show that crop damage is related significantly to the predicted presence of rodent species for seven of nine crops. Museum collections may thus provide important baseline information for designing land-use and agricultural pest-management programs MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 22 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000087811600029 SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(13):7074-7077 1785 UI - 15042 AU - Sanchez-Gil JA AU - Garcia-Ramos JV AU - Mendez ER AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainCtr Invest Cientif & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoSanchez-Gil, JA, CSIC, Inst Estructura Mat, Serrano 121, E-28006 Madrid, Spain TI - Near-field electromagnetic wave scattering from random self-affine fractal metal surfaces: Spectral dependence of local field enhancements and their statistics in connection with surface-enhanced Raman scattering AB - By means of rigorous numerical simulation calculations based on the Green's theorem integral equation formulation, we study the near electromagnetic field in the vicinity of very rough, one-dimensional self-affine fractal surfaces of Ag, Au, and Cu (for both vacuum and water propagating media) illuminated by a p-polarized field. Strongly localized enhanced optical excitations (hot spots) are found, with electric field intensity enhancements of close to 4 orders of magnitude and widths below a tenth of the incoming wavelength. These effects are produced by the roughness-induced surface-plasmon polariton excitation. We study the characteristics of these optical excitations as well as other properties of the surface electromagnetic field, such as its statistics (probability density function, average, and fluctuations), and their dependence on the excitation spectrum (in the visible and near-infrared regions). Our study is relevant to the use of self-affine fractals as surface-enhanced Raman scattering substrates, where large local and average field enhancements are desired MH - Mexico|Baja California MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000089977100100 L2 - HIGH-DENSITY DISPERSIONS; SCANNING-TUNNELING-MICROSCOPY; PLASMON POLARITONS; LIGHT-SCATTERING; OPTICAL-EXCITATIONS; COLLOID CLUSTERS; THIN-FILMS; LOCALIZATION; SPECTROSCOPY; PARTICLES SO - Physical Review B 2000 ;62(15):10515-10525 1786 UI - 14968 AU - Sanchez-Lavega A AU - Rojas JF AU - Sada PV AU - Sada PV AD - Univ Pais Vasco, ETS, Dept Fis Aplicada, Bilbao 48013, SpainUniv Monterrey, Dept Fis & Math, Garza Garcia 66238, MexicoSanchez-Lavega, A, Univ Pais Vasco, ETS, Dept Fis Aplicada, Alda Urquijo S-N, Bilbao 48013, Spain TI - Saturn's zonal winds at cloud level AB - We present an analysis of new cloud motion measurements in Saturn's atmosphere from Voyager 1 and 2 images and define a nominal zonal wind velocity vs latitude profile for the cloud top level that can be used as reference for the upcoming Cassini mission. Improvements over previous studies include: (i) twice the number of wind vectors used, (ii) independent measurements of cloud tracers, (iii) extended latitudinal coverage, (iv) strict error control and evaluation, and (v) a new zonal averaging methodology. Mean zonal wind velocities are given for the latitude range 81 degrees to -71 degrees (planetographic) in steps of 0.5 degrees with a gap between 0 degrees and -10 degrees due to ring shadowing. This research also includes the study of the morphology and motions of cloud systems in the equator and in the southern hemisphere which have not been described previously. We give an ephemeris (motion equation) for several long-lived features that could be observable if they survive until Cassini arrives on Saturn. The long-term behavior of the zonal wind profile is studied by comparing it with a complete set of wind velocities compiled from historical and modern ground-based and HST observations. Significant changes are noted in the equatorial jet between this set and the nominal Voyager profile. We discuss in detail the possible origin for such differences, (C) 2000 Academic Press MH - Mexico|Nuevo Leon MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0019-1035 UR - ISI:000090125100006 L2 - 1990 EQUATORIAL DISTURBANCE; HUBBLE SPACE TELESCOPE; NORTH POLAR SPOT; ATMOSPHERE; VOYAGER-1; DYNAMICS; ALBEDOS; JUPITER; MOTIONS; IMAGES SO - Icarus 2000 ;147(2):405-420 1787 UI - 16545 AU - Sanchez-Loredo MG AU - Grote M AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Gesamthsch Paderborn, Dept Appl Chem, D-33098 Paderborn, GermanyGrote, M, Univ Autonoma San Luis Potosi, Inst Met, Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Carboxyl-substituted derivatives of S-decyl dithizone as solvent extractants for precious metal ions AB - Novel ortho-, meta- and para-monocarboxyl-substituted derivatives of S-decyldithizone (D-oC, D-mC and D-pC) and the unsubstituted parent compound (D-H) were synthesized and their extraction properties towards precious and base metal ions investigated. Dissolved in p-xylene or chloroform, the formazan compounds were spontaneously oxidized to the corresponding tetrazolium salts by contact with aqueous Au(III) solution. Towards palladium the dithizone derivatives acted via chelation. The mode of coordination was strongly influenced by the position of the carboxylic acid group. As a consequence, only the o-COOH-derivative D-oC formed exclusively one 1:1:1 (Pd(II)-ligand-Cl) complex; whereas the other extracting agents yielded a mixture of different isomeric palladium chelates in the organic phase. D-oC removed Pd(II) from hydrochloric acid solutions effectively and selectively. Compared to the other compounds the coextraction of Pt(TV), Os(IV), as well as Fe(III) and other base metals was drastically reduced. Stripping was achieved by acidic thiourea solution and thiocyanate, however, the tendency of D-oC to pile up traces of precious metal ions was obvious MH - Germany MH - Mexico|San Luis Potosi PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0736-6299 UR - ISI:000085147900004 L2 - EXCHANGE RESINS; FUNCTIONAL-GROUPS; BONDED DITHIZONE; NOBLE-METALS; KINETICS; DEHYDRODITHIZONE; PALLADIUM(II); COMPLEXES; PLATINUM; 3-METHYLTHIO-1,5-DIARYLFORMAZANS SO - Solvent Extraction and Ion Exchange 2000 ;18(1):55-76 1788 UI - 16021 AU - Sanchez-Pena SR AD - Univ Autonoma Agr Antonio Narro Saltillo, Dept Parasitol Agr, Coahuila 25315, MexicoSanchez-Pena, SR, Univ Texas, Sch Biol Sci, Austin, TX 78712, USA TI - Entomopathogens from two Chihuahuan desert localities in Mexico AB - A list of entomopathogens from two Chihuahuan desert localities in Mexico is given. Rhabditid nematodes, nuclear polyhedrosis viruses, a rickettsia (Rickettsiella popilliae), the fungi Beauveria bassiana, Entomophaga calopteni (= Entomophaga grylli pathotype 2), Entomophthora muscae, Entomophthora planchoniana, Furia vomitoriae, Nomuraea rileyi, Metarhizium anisopliae var. anisopliae, Pandora gammae, Pandora neoaphidis and Zoophthora radicans, and the microsporidian Nosema weiseri were all collected from the campus of the Universidad Autonoma Agraria Antonio Narro, near the city of Saltillo, state of Coahuila, Mexico. Metarhizium anisopliae var. anisopliae and Paecilomyces fumosoroseus were collected in the urban area of Saltillo. B. bassiana, Fusarium sp. (very similar to Fusarium coccophilum), M. anisopliae and Paecilomyces farinosus were collected in an apple orchard 50 km east of Saltillo. The nematodes, B. bassiana, E. calopteni, M. anisopliae, P. gammae, P. neoaphidis, and Z. radicans caused mortality levels of > 10% in their respective hosts in the field MH - Mexico|Coahuila MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 1386-6141 UR - ISI:000087050400005 L2 - biological control;Deuteromycetes;entomopathogen;Entomophthorales;fungi;Mexico;microsporidian;polyhedrosis virus;rhabditid;rickettsia;FUNGI; ENTOMOPHTHORACEAE; CONIDIA SO - Biocontrol 2000 ;45(1):63-78 1789 UI - 16089 AU - Sanchez-Pena SR AD - Univ Autonoma Agr Antonio Narro, Dept Parasitol Agr, Saltillo 25315, Coahuila, MexicoSanchez-Pena, SR, Univ Texas, Sch Biol Sci, 1-22 Painter Hall, Austin, TX 78712 USA TI - Infectivity of Zoophthora radicans (Zygomycetes : Entomophthorales) towards Trialeurodes vaporariorum (Homoptera : Aleyrodidae) nymphs MH - Mexico|Coahuila MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000086704000016 L2 - LEPIDOPTERA; VIRESCENS SO - Florida Entomologist 2000 ;83(1):101-105 1790 UI - 16431 AU - Sanchez-Portal M AU - Diaz AI AU - Terlevich R AU - Terlevich E AU - Alvarez MA AU - Aretxaga I AD - Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, SpainLAEFF, INTA, Madrid 28080, SpainUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla, MexicoSanchez-Portal, M, Univ Autonoma Madrid, Dept Fis Teor, C-XI, E-28049 Madrid, Spain TI - Broad-band and H alpha surface photometry of the central regions of nearby active galaxies - I. Observations AB - Broad-band V, R and I and narrow-band H alpha CCD surface photometry of a sample of 24 active and three normal nearby galaxies is presented, in order to study their morphological and structural properties. This first paper presents the observations, data reduction and processing techniques used; the main characteristics of the central regions of the sample galaxies are derived from broad-band and H alpha images; broad-band surface brightness and colour profiles are presented; based on the inspection of individual images and the examination of the radial variation of ellipticity and polar angle, the morphological class of the sample objects is revised: several objects previously classified as non-barred or unclassified are found to be barred galaxies. A high fraction (similar to 71 per cent) of the objects that present any kind of nuclear activity are barred. This proportion is even higher (similar to 87 per cent) if only Seyfert galaxies are considered. This result can reinforce the clues about the connection between bars and nuclear activity as a fuelling mechanism that can trigger and sustain nuclear activity MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000085634700003 L2 - galaxies : active;galaxies : fundamental parameters;galaxies : photometry;SEYFERT-GALAXIES; GALACTIC NUCLEI; STARBURST GALAXIES; RADIO STRUCTURES; BRIGHT GALAXIES; SPIRAL GALAXIES; STANDARD STARS; BAR; CCD; ENVIRONMENT SO - Monthly Notices of the Royal Astronomical Society 2000 ;312(1):2-32 1791 UI - 14764 AU - Sanchez-Valenzuela OA AU - Victoria-Monge C AD - CIMAT, Guanajuato 36000, Gto, MexicoPolytech Univ, Dept Mat Apl & Telem, Barcelona 08034, Spain TI - Classification of integration patterns on R AB - The indefinite integration problem in R-1/1 is approached by looking at those derivations on this graded manifold that admit a right inverse. The integration formulae that arise this way are classified in terms of the action of the diffeomorphism group of R-1/1. The Berezin integral, and other integral formulae proposed in the literature for graded manifolds, arise as examples of right inverses for specific derivations. A thorough analysis of the Berezin integral is made for (1, 1)-dimensional smooth and holomorphic graded manifolds. It is proved that a SUSY-curve carries a canonical indefinite integration defined on its Berezinian sheaf which is not given by the Berezin integral. Finally, the variational calculus is applied to the integrals here classified, and their corresponding Euler-Lagrange equations are given MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0926-2245 UR - ISI:000165710000005 L2 - Berezin integration;graded manifolds;SUSY-curves;Euler-Lagrange equations on graded manifolds;SUPERMANIFOLDS SO - Differential Geometry and Its Applications 2000 ;13(3):277-306 1792 UI - 15096 AU - Sanchez E AU - Soto JM AU - Garcia PC AU - Lopez-Lefebre LR AU - Rivero RM AU - Ruiz JM AU - Romero L AD - Univ Granada, Fac Sci, Dept Plant Biol, E-18071 Granada, SpainUniv Chihuahua, Dept Agrotechnol Sci, Chihuahua 31170, MexicoRomero, L, Univ Granada, Fac Sci, Dept Plant Biol, E-18071 Granada, Spain TI - Phenolic compounds and oxidative metabolism in green bean plants under nitrogen toxicity AB - The objective of the present work was to determine the effect of nitrogen toxicity on the metabolism of phenolic compounds and of oxidative stress in Phaseolus vulgaris L. cv. Strike. The nitrogen was applied to the nutrient solution as NH4NO3 at 5.4, 10.8, 16.2, 21.6 and 27 mM. The results indicate that the application of 27 mM N can be defined as toxic, as it drastically depressed growth of the green bean plants in our experiment. In addition, the abiotic stress from the application of this N dosage inhibited the enzymes polyphenol oxidase, peroxidase and catalase, and stimulated phenylalanine ammonia-lyase and superoxide dismutase activities. The result was foliar accumulation of phenolic compounds and hydrogen peroxide (H2O2). The accumulation of H2O2 also apparently caused a reduction in biomass production MH - Mexico|Chihuahua MH - Spain PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0310-7841 UR - ISI:000089790400011 L2 - green bean;Leguminosae;nitrogen toxicity;oxidative metabolism;Phaseolus vulgaris;phenolic bioactivity;PHENYLALANINE AMMONIA-LYASE; SUPEROXIDE-DISMUTASE; PEROXIDASE-ACTIVITY; POLYPHENOL OXIDASE; HYDROGEN-PEROXIDE; SALICYLIC-ACID; WINTER-WHEAT; DEFENSE; STRESS; LEAVES SO - Australian Journal of Plant Physiology 2000 ;27(10):973-978 1793 UI - 15752 AU - Sanchez E AU - Soto JM AU - Garcia PC AU - Lopez-Lefebre LR AU - Rivero RM AU - Ruiz JM AU - Romero L AD - Univ Granada, Fac Sci, Dept Plant Biol, E-18071 Granada, SpainUniv Chihuahua, Univ Agrotechnol Sci, Chihuahua, MexicoSanchez, E, Univ Granada, Fac Sci, Dept Plant Biol, E-18071 Granada, Spain TI - Phenolic and oxidative metabolism as bioindicators of nitrogen deficiency in French bean plants (Phaseolus vulgaris L. cv. Strike) AB - The aim of the present work was to determine the effect of abiotic stress, such as nitrogen (N) deficiency, on phenol and oxidative metabolism. In addition, we analyzed whether the response of the two metabolic processes is a good bioindicator of N deficiency in French bean plants. The N was applied to the nutrient solution in the form of NH4NO3 at 1.35 mM (N1), 2.7 mM (N2) and 5.4 mM (N3), this latter dosage being considered optimal. The results indicated that application of 1.35 and 2.70 mM of N can be defined as suboptimal or deficient, as it depressed foliar biomass of the French bean plants in our experiment. In addition, abiotic stress from the application of these N dosages stimulated the enzymes PPO, POD and CAT, and inhibited PAL and SOD activities, resulting in the lowest foliar accumulation of phenolic compounds and H2O2 MH - Mexico|Chihuahua MH - Spain PB - STUTTGART: GEORG THIEME VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 1435-8603 UR - ISI:000087865600003 L2 - Phaseolus vulgaris;French bean;nitrogen;phenolic compounds;oxidative metabolism;PHENYLALANINE AMMONIA-LYASE; POLYPHENOL OXIDASE; PEROXIDASE-ACTIVITY; PHENYLPROPANOID METABOLISM; SUPEROXIDE-DISMUTASE; DISEASE RESISTANCE; HYDROGEN-PEROXIDE; SALICYLIC-ACID; ZEA-MAYS; DEFENSE SO - Plant Biology 2000 ;2(3):272-277 1794 UI - 15818 AU - Sanchez FJG AU - Ortiz-Conde A AU - Salcedo JA AU - Muci J AU - Estrada M AU - Cerdeira A AU - Liou JJ AU - Yue Y AD - Univ Simon Bolivar, Dept Elect, Caracas 1080A, VenezuelaIPN, CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Mexico City 07300, DF, MexicoUniv Cent Florida, Dept ECE, Orlando, FL 32816, USAHarris Semicond Inc, Technol Dev, Melbourne, FL 32902, USAOrtiz-Conde, A, Univ Simon Bolivar, Dept Elect, Apartado 89000, Caracas 1080A, Venezuela TI - Validation of bulk-charge effect parameter extraction in MOSFETs AB - Our recently proposed method to extract the bulk-charge effect parameter in MOSFETs is scrutinized by studying SOI devices, a-Si:H TFTs and short- as well as long-channel bulk MOSFETs. The method requires measuring the drain current as a function of gate voltage at two small values of drain voltage chosen in the linear region of operation, (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 0026-2714 UR - ISI:000087640800005 L2 - CHANNEL SO - Microelectronics Reliability 2000 ;40(6):941-945 1795 UI - 15995 AU - Sanchez JA AU - Ho CS AU - Vaughan DM AU - Garcia MC AU - Grange RW AU - Joho RH AD - Univ Texas, SW Med Ctr, Ctr Basic Neurosci, Dept Physiol, Dallas, TX 75390, USADept Pharmacol, Mexico City 07300, DF, MexicoJoho, RH, Univ Texas, SW Med Ctr, Ctr Basic Neurosci, Dept Physiol, 5323 Harry Hines Blvd, Dallas, TX 75390 USA TI - Muscle and motor-skill dysfunction in a K+ channel-deficient mouse are not due to altered muscle excitability or fiber type but depend on the genetic background AB - The voltage-gated K+ channel Kv3.1 is expressed in skeletal muscle and in GABAergic interneurons in the central nervous system. Hence, the absence of Kv3.1 KC channels may lead to a phenotype of myogenic or neurogenic origin, or both. Kv3.1-deficient (Kv3.1(-/-)) 129/Sv mice display altered contractile properties of their skeletal muscles and show poor performance on a rotating rod. In contrast, Kv3.1(-/-) mice on the (129/SvxC57BL/6)F1 background display normal muscle properties and perform like wild-type mice. The correlation of poor performance on the rotating rod with altered muscle properties supports the notion that the skeletal muscle dysfunction in Kv3.1(-/-) 129/Sv mice may be responsible for the impaired motor skills on the rotating rod. Surprisingly, we did not find major differences between wild-type and Kv3.1(-/-) 129/Sv skeletal muscles in either the resting or action potential, the delayed-rectifier potassium conductance (g(K)) Or the distribution of fast and slow muscle fibers. These findings suggest that the Kv3.1 K+ channel may not play a major role in the intrinsic excitability of skeletal muscle fibers although its absence leads to slower contraction and relaxation and to smaller forces in muscles of 129/Sv Kv3.1(-/-) mice MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Physiology U5 - J;Article AV - English IS - 0031-6768 UR - ISI:000087082700004 L2 - excitation-contraction coupling;ion-channel mutation;knockout mouse;muscle properties;SKELETAL-MUSCLE; RAT-BRAIN; PHARMACOLOGICAL CHARACTERIZATION; SARCOPLASMIC-RETICULUM; PLASMA-MEMBRANES; MESSENGER-RNAS; PATCH-CLAMP; EXPRESSION; CURRENTS; KV3.1 SO - Pflugers Archiv-European Journal of Physiology 2000 ;440(1):34-41 1796 UI - 14755 AU - Sanchez JJ AU - Stuber CW AU - Goodman MM AD - N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695, USAUniv Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Zapopan 45110, Jalisco, MexicoN Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695, USAN Carolina State Univ, Dept Genet, Raleigh, NC 27695, USAN Carolina State Univ, USDA ARS, Raleigh, NC 27695, USAGoodman, MM, N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695 USA TI - Isozymatic diversity in the races of maize of the Americas AB - To determine the genetic diversity of the races of maize of the Americas, 1080 accessions representing more than 300 races were analyzed for 13 enzyme systems encoded by 23 genetic loci. The analysis of the data revealed very different levels of genetic diversity across countries. A total of 329 :alleles were recorded; however, about 81% of the alleles found in the :accessions studied were rare, occurring at frequencies below 0.01; some were observed in only one accession or only one race. There are two geographical regions where allelic diversity is concentrated: Mesoamerica and the Andean Region. In general, the levels of racial diversity can be attributed to geo graphic range. The uses by human groups and sample sizes of the seed lots used by farmers from one cycle to the next are factors which likely affect this diversity MH - Mexico|Jalisco MH - USA PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 8 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000165651600005 L2 - races of maize;isozymes;genetic diversity;maize;GENETIC-MARKERS; INTRACELLULAR-LOCALIZATION; SAMPLE-SIZE; CONSERVATION; GERMPLASM; INHERITANCE; MEXICO; WILD SO - Maydica 2000 ;45(3):185-203 1797 UI - 16285 AU - Sanchez JJ AU - Goodman MM AU - Stuber CW AD - Univ Guadalajara, Ctr Ciencias Biol & Agropecuarias, Zapopan 45110, Jalisco, MexicoN Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695, USAN Carolina State Univ, Dept Genet, Raleigh, NC 27695, USAN Carolina State Univ, USDA ARS, Raleigh, NC 27695, USASanchez, JJ, Univ Guadalajara, Ctr Ciencias Biol & Agropecuarias, Km 15-5 Guadalajara Nogales, Zapopan 45110, Jalisco, Mexico TI - Isozymatic and morphological diversity in the races of maize of Mexico AB - To determine the relationships and genetic diversity among the Mexican races of maize, 209 accessions representing 59 races were analyzed for 21 enzyme systems encoded by 37 loci; 154 out of the 209 accessions were grown in multiple locations and seasons irt Mexico and 47 morphological characters were measured. A very high level of variation among and within the Mexican races was found. However, more than 65% of the alleles Sound in the accessions studied are rare, occurring at frequencies below 0.01. In addition, some populations have low levels of genetic diversity and have values of genetic differentiation similar to selfing crops. Most of the accessions with low values of genetic diversity are specialty varieties MH - Mexico|Jalisco MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 21 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000086227600005 L2 - Zea mays L.;isozymes;genetic diversity;genetic differentiation;INTRACELLULAR-LOCALIZATION; GENETIC-VARIATION; CLASSIFICATION; INHERITANCE SO - Economic Botany 2000 ;54(1):43-59 1798 UI - 14559 AU - Sanchez JL AU - Gil ADS AU - Aquino JM AU - Torres-Garibay C AD - Univ La Habana, Fac Fis, IMRE, Lab Magnetismo, La Habana 10400, CubaCIMAV, Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoSanchez, JL, Univ La Habana, Fac Fis, IMRE, Lab Magnetismo, La Habana 10400, Cuba TI - On the synthesis of the new intermetallic phase Nd-3(Fe,W)(29) AB - A novel intermetallic compound, Nd3Fe27.5W1.5, that shows the monoclinic Nd-3(Fe,Ti)(29)-type crystal structure (space group A2/m), has been obtained from powders homogeneously mixed and processed by are melting. A notable reduction in the annealing time at 1100 degreesC was obtained by using this procedure. From the Rietveld refinement of the powder X-ray diffractogram, the phase constitution and crystal structure were determined. The analysis shows that a 3:29 type compound is the majority phase (90 wt.%). It coexists with alpha-(Fe,W) (8 wt.%) and a 1:12 type phase (2 wt.%) as minority components. SEM and EDAX analyses were performed in order to characterize the microstructure. It was concluded that the 3:29 phase is the main component, in agreement with the results obtained by XRD and TMA. The Nd3Fe27.5W1.5, compound exhibits a Curie temperature of 124 degreesC and a room temperature saturation magnetization of 96 emu/g (at H-max=16 kOe). (C) 2000 Published by Elsevier Science B.V MH - Cuba MH - Mexico|Chihuahua PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Letter AV - English IS - 0925-8388 UR - ISI:000166233600004 L2 - rare earth compounds;transition metal compounds;magnetization;crystal structure;X-ray diffraction;MAGNETIC-PROPERTIES; TERNARY PHASE; TI)(29); ND; SM; GD; CR; MN SO - Journal of Alloys and Compounds 2000 ;313():L15-L18 1799 UI - 15346 AU - Sandoval-Castro CA AU - Anderson S AU - Leaver JD AD - Univ London Wye Coll, Ashford TN25 5AH, Kent, EnglandUniv Yucatan, Fac Vet Med & Anim Sci, Merida 97100, Yucatan, MexicoLeaver, JD, Univ London Wye Coll, Ashford TN25 5AH, Kent, England TI - Production responses of tropical crossbred cattle to supplementary feeding and to different milking and restricted suckling regimes AB - The relationships between cow nutrition, restricted suckling and milking patterns and their effect on milk yield, milk composition and calf growth were examined under tropical conditions in south east Mexico. Eleven Bos indicus X Bos taurus cows, 14 days postpartum, with calves weighing on average 37 kg were used in a change-over experimental design. All cows were fed Cynodon nlemfuensis hay ad libitum, and either 4.0 kg Leucaena leucocephala, 2.0 kg sorghum grain and 0.25 kg sugar-cane molasses on a fresh weight basis (L1), or twice this amount of the same supplement (L2). The calves were offered the same hay ad libitum in addition to suckling milk. The milking/restricted suckling treatments were: twice-daily milking with suckling after morning milking (2 X AM), and once-daily milking in the morning with afternoon suckling (1 X PM). The two regimes were examined at L1 and L2 feeding levels. A suckling time of 30 min was allowed at each suckling occasion. For 2 X AML1, 2 X AML2, 1 X PML1 and 1 X PML2, respectively saleable milk yields (SMYs) (kg/day) were 5.43, 5.99, 3.47, 4.09 (S.E.M. 0.174); calf suckled milk (CSM) (kg/day) 1.36, 1.46, 3.14, 3.43 (S.E.M. 0.160); and total milk yield (kg/day) 6.79, 7.46, 6.62, 7.53 (S.E.M. 0.226). For SMYs, fat contents (g/kg) were 30.0, 29.4, 29.0, 28.7 (S.E.M. 1.11), respectively, and for CSM 59.6, 63.4, 38.8, 42.4 (S.E.M. 2.46). Protein contents (g/kg) for SMYs were 27.5, 29.1, 29.3, 30.4 (S.E.M. 0.67) and for CSM 27.9, 28.4, 29.1, 30.3 (S.E.M. 0.81). Total food intakes of cows were 10.84, 12.12, 10.99, 12.16 (S.E.M. 0.331) kg DM/day. Calf growth rates were, respectively, 0.17, 0.20, 0.41, 0.52 (S.E.M. 0.029) kg/day, and hay DM intake 0.58, 0.49, 0.41, 0.34 (S.E.M. 0.040) kg/day. It was concluded that level of supplementation and restricted suckling and milking regimes could both be used to manipulate TMY, SMY and calf performance. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0301-6226 UR - ISI:000089007000002 L2 - cattle;feed supplements;tropical feeds;milk production;suckling;VOLUNTARY FOOD-INTAKE; SEMI-HUMID TROPICS; LEUCAENA-LEUCOCEPHALA; LIVE-WEIGHT; DAIRY-COWS; AD-LIBITUM; DIGESTIBILITY; LACTATION; CALVES; SYSTEM SO - Livestock Production Science 2000 ;66(1):13-23 1800 UI - 16079 AU - Sandoval-Villa M AU - Guertal EA AU - Wood CW AD - Colegio Postgrad, Programa Edafol, Montecillo 56230, Mex, MexicoAuburn Univ, Dept Agron & Soils, Auburn, AL 36849, USASandoval-Villa, M, Colegio Postgrad, Programa Edafol, Montecillo 56230, Mex, Mexico TI - Tomato leaf chlorophyll meter readings as affected by variety, nitrogen form, and nighttime nutrient solution strength AB - Leaf chlorophyll content is closely related to leaf nitrogen (N) content, so it is reasonable to assume that ammonium-N (NH4-N):nitrate-N (NO3-N) ratio in the nutrient solution used to grow tomatoes (Lycopersicon esculentum Mill.) hydroponically may affect leaf greenness, and consequently chlorophyll meter (SPAD) readings. It has also been shown that increasing nutrient solution strength (NSS) increases tomato productivity, but there are no reports regarding how NSS affects SPAD readings under greenhouse conditions. Genotype may also influence SPAD readings, and standardization for cultivar and sampling time may be needed. The objective of this study was to characterize SPAD readings for five tomato cultivars and SPAD reading response to a combination of two NSS (1X and 4X Steiner solution strength daily applied 18 days after transplanting at 7 p.m.) and two concentrations of NH4-N in solution (0 and 25%) in order to evaluate the potential of SPAD readings as a tomato yield predictor in greenhouse production systems. The SPAD readings were not uniform across tomato varieties tested, being consistently higher for 'Max' and lower for the other varieties. Initially, SPAD readings for tomato varieties used in this study were low at the vegetative stage, and increased up to 40 DAT, but subsequently decreased at 49 DAT, or the fruit set of the first and second clusters. After this time, SPAD readings showed no variation. Chlorophyll meter readings for 'Max' were higher in the top plant layers, but decreased in the top plant layer of the other tomato varieties. The SPAD readings were higher for plants supplied with 25% NH4-N than those without NH4-N in solution, but the use of a nighttime nutrient solution did not affect SPAD readings. None of the possible interactions among tomato variety, NH4-N:NO3-N ratio, and NSS were consistently significant MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000086720500007 L2 - GROWTH; YIELD; CORN SO - Journal of Plant Nutrition 2000 ;23(5):649-661 1801 UI - 15423 AU - Sangha RS AU - Cruz ACP AU - Chavez-Sanchez MC AU - Jones DA AD - Ctr Invest Alimentac & Desarrollo, AC CIAD, Unidad Mazatlan Acuicultura & Manejo Ambiental, Mazatlan 82010, Sinaloa, MexicoUniv Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, WalesSangha, RS, Ctr Invest Alimentac & Desarrollo, AC CIAD, Unidad Mazatlan Acuicultura & Manejo Ambiental, Apdo Postal 711, Mazatlan 82010, Sinaloa, Mexico TI - Survival and growth of Litopenaeus vannamei (Boone) larvae fed a single dose of live algae and artificial diets with supplements AB - The present work evaluates the effectiveness of partial or total replacement of microalgae with artificial diets [CAR Frippak. experimental Dry Immune Selco (DIS, with vitamins C, E, HUFA and immunostimulants)] administered together with a single dose of live algae (SDLA) for the protozoeal stages of the Pacific white shrimp Litopenaeus vannamei (Boone) (expt 1). In expt 2, Artemia enriched with DIS were fed to mysis l-postlarvae 1 to assess diet performances. The results indicate that highest survival and growth is obtained when larvae at the N6-PZ1 moult are administered DIS (2 mg L-1 day(-1)) + CAR (2 mg L-1 day(-1)) and SDW (20 cells mu L-1 mixed algae, Chaetoceros muelleri and Isochrysis galbana, 70%:30% respectively) as a first feed, and DIS + CAR (2 mg L-1 day(-1) each) thereafter until PZ3 (survival 91.2%), as opposed to live microalgae control (81.9%). A significantly better total length was achieved by larvae fed the live microalgae control (2.51 mm) or the above artificial diet regime (2.44 mm) than in all other treatments. Larvae administered this artificial diet treatment were significantly heavier (0.039 mg larvae(-1)) than those fed the algal control (0.023 mg larvae(-1)) or any other treatment. This may result from the combined effect of the artificial diet together with vitamins C, E and HUFA in the booster DIS. These results demonstrate for the first time the impact that a single first feed at the N6-PZ1 moult may have on later development, as all larval groups received the same diet from the PZ1 to PZ3 stages. The results from expt 2 indicate that the administration of Artemia enriched with DIS during mysis 1-post-larvae 1 for L. vannamei larvae results in significant increase in survival (88.6%), total length (5.24 mm) and weight (0.155 mg larvae(-1)) in comparison with other enrichments, such as DIS 5V1 (without vitamins, but with HUFA) or non-enrichment MH - Mexico|Sinaloa MH - United Kingdom PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000088859900007 L2 - SHRIMP SO - Aquaculture Research 2000 ;31(8-9):683-689 1802 UI - 16077 AU - Sangha RS AU - Chavez-Sanchez MC AU - Martinez-Palacios CA AU - Martinez-Rodriguez IE AU - Papp ZG AD - Ctr Invest Alimentac & Desarrollo AC, Unidad Mazatlan Acicultura & Manejo Ambiental, Mazatlan 82010, Sinaloa, MexicoFish Culture Res Inst, Dept Fish Biol, H-SS41 Szarvas, HungarySangha, RS, Ctr Invest Alimentac & Desarrollo AC, Unidad Mazatlan Acicultura & Manejo Ambiental, Apartado Postal 711, Mazatlan 82010, Sinaloa, Mexico TI - Effect of supplementing ascorbic acid (L-ascorbyl-2-polyphosphate) in broodstock diet of the white shrimp Litopenaeus vannamei MH - Hungary MH - Mexico|Sinaloa PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000086761400018 L2 - VITAMIN-C REQUIREMENTS; PENAEUS-MONODON; PERFORMANCE; ASSAY SO - Journal of the World Aquaculture Society 2000 ;31(1):137-144 1803 UI - 15890 AU - SanGiovanni JP AU - Parra-Cabrera S AU - Colditz GA AU - Berkey CS AU - Dwyer JT AD - Harvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USANatl Publ Hlth Inst, Ctr Hlth Res, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115, USAHarvard Univ, Sch Med, Channing Lab, Boston, MA, USATufts Univ, New England Med Ctr, Sch Med, Frances Stern Nutr Ctr, Medford, MA 02155, USATufts Univ, Sch Nutr Sci & Policy, Medford, MA 02155, USASanGiovanni, JP, NEI, Div Biometry & Epidemiol, NIH Bldg 31,Room 6A52,31 Ctr Dr,MSC 2510, Bethesda, MD 20892 USA TI - Meta-analysis of dietary essential fatty acids and long-chain polyunsaturated fatty acids as they relate to visual resolution acuity in healthy preterm infants AB - Objective. To derive combined estimates of visual resolution acuity differences between healthy preterm infants consuming different compositions and ratios of essential fatty acids (EFAs) and docosahexaenoic acid (DHA), an omega-3 (n-3) long-chain polyunsaturated fatty acid (LCPUFA). Data Sources. Electronic biomedical reference database (Medline and Health Star from 1965 to July 1999) searches with index terms omega-3, n-3, infant, vision, acuity, and human. Current review article, monograph, and book chapter bibliography/reference section hand searches. Study Selection. A total of 5 original articles and 4 review chapters were reviewed for details on study design, conduct, and outcome. Four prospective trials of EFA/LCPUFA supplementation were included in these analyses. For behaviorally based outcomes, there were 2 randomized comparisons each at less than or equal to 1, 2, 6, 9, and 12 months of corrected age and 4 randomized comparisons at 4 months of corrected age. For electrophysiologically based outcomes (visual-evoked potential), there were 2 randomized comparisons each at less than or equal to 1 and similar to 4 months of corrected age. Data Extraction. Dietary composition and EFA/LCPUFA balance, study design, and analytic characteristics (duration of feeding, source of EFAs/LCPUFAs, number of subjects in study population, number of subjects analyzed, and basis for estimating age), and experiment-based characteristics (location, number or sites, design, vision tests employed, testing protocol, and ophthalmic examination) were recorded independently by 2 researchers with a standardized protocol. Data Synthesis. The relative difference in visual resolution acuity between groups of infants who received a source of dietary EFAs/LCPUFAs and groups who did not was computed and then analyzed with the DerSimonian and Laird random-effects method. Results. Analysis of the randomized comparisons (DHA-supplemented formula vs DHA-free formula) showed significant differences in visual resolution acuity at 2 and 4 months of age. Combined estimates of behaviorally based visual resolution acuity differences at these ages were .47 +/- .14 octaves and .28 +/- .08 octaves, respectively. A 1-octave difference is a reduction in the width of the stimulus elements by 50%. Conclusion. These results support efficacy of n-3 LCPUFA intake in early visual system development, although supplementation safety issues still must be addressed through larger randomized trials. Whether n-3 intake confers lasting advantage in visually based process development across the life-span is still to be determined MH - USA MH - Mexico|Morelos PB - ELK GROVE VILLAGE: AMER ACAD PEDIATRICS RP - NOT IN FILE U3 - TC 78 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-4005 UR - ISI:000087441400032 L2 - breast milk;docosahexaenoic acid;infant;meta-analysis;omega-3 fatty acids;visual acuity;DOCOSAHEXAENOIC ACID; CEREBRAL-CORTEX; TERM INFANTS; SUPPLEMENTATION; ACCRETION; RETINA; BRAIN SO - Pediatrics 2000 ;105(6):1292-1298 1804 UI - 16217 AU - Santamaria-Gallegos NA AU - Janchez-Lizaso JL AU - Felix-Pico EF AD - Univ Alicante, Dept Ciencias Ambientales & Recursos Nat, Unidad Biol Marina, E-03080 Alicante, SpainIPN, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, BCS, MexicoSantamaria-Gallegos, NA, Univ Alicante, Dept Ciencias Ambientales & Recursos Nat, Unidad Biol Marina, Ap Correos 99, E-03080 Alicante, Spain TI - Phenology and growth cycle of annual subtidal eelgrass in a subtropical locality AB - This study describes the phenology, life cycle and reproductive potential of Zostera marina L. (eelgrass) in Bahia Concepcion, the southernmost population on the west coast of the Gulf of California. Z. marina populations in the Gulf of California are the unique annual subtidal meadows existing only in the coldest season of the year, from December to May, and surviving the adversely warm summer season as seeds. The maximum shoot density was 2334 shoots per square meter in January, the minimum recorded during the growth season was 664 shoots per square meter in May. Before December and after May no living plants were found. Until March, the percentage cover of the meadow was up to 90%, in April some patches of dead shoots were found (16%) and in May the meadow disappeared. Several growth variables, such as above-ground biomass, rhizome branching, leaf-blade morphology, and leaf area index, showed that the main vegetative growth was in the period December-January. The appearance of the first flowering shoots was in late January and the first fruit appearance was observed in March. The presence of flowers was observed from February to May. Fruit production was maximum in late March (21 fruits per shoot), decreasing later to eight fruits per shoot due to the release of seeds. Seed production was estimated to be 30,000 seeds per square meter. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000086342300007 L2 - life cycle;phenology;seagrass;annual eelgrass;Zostera marina;Gulf of California;ZOSTERA-MARINA L; GERMINATION; NETHERLANDS SO - Aquatic Botany 2000 ;66(4):329-339 1805 UI - 15594 AU - Santamaria RI AU - Reyes-Duarte MD AU - Barzana E AU - Fernando D AU - Gama FM AU - Mota M AU - Lopez-Munguia A AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUNAM, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoUniv Minho, Ctr Engn Biol, P-4709 Braga, PortugalLopez-Munguia, A, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - Selective enzyme-mediated extraction of capsaicinoids and carotenoids from chili guajillo puya (Capsicum annuum L.) using ethanol as solvent AB - The selective extraction of capsaicinoids and carotenoids from chili guajillo "puya" flour was studied.. When ethanol was used as solvent, 80% of capsaicinoids and 73% of carotenoids were extracted, representing an interesting alternative for the substitution of hexane in industrial processes. Additionally, when the flour was pretreated with enzymes that break the cell wall and then dried, extraction in ethanol increased to 11 and 7% for carotenoid and capsaicinoid, respectively. A selective two-stage extraction process after the treatment with enzymes is proposed. The first step uses 30% (v/v) ethanol and releases up to 60% of the initial capsaicinoids, and the second extraction step with industrial ethanol permits the recovery of 83% of carotenoids present in the flour MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Portugal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000088319600078 L2 - Capsicum annuum;carotenoids;capsaicinoids;selective extraction;enzymatic extraction;OIL EXTRACTION; OILSEEDS; PRETREATMENT; COTTONSEED; OLEORESINS; SUNFLOWER; RECOVERY; ALCOHOL; FRUITS SO - Journal of Agricultural and Food Chemistry 2000 ;48(7):3063-3067 1806 UI - 15003 AU - Santana G AU - Morales-Acevedo A AU - Vigil O AU - Vaillant L AU - Cruz F AU - Contreras-Puente G AD - IPN, CINVESTAV, Dept Elect Engn, SEES, Mexico City 07360, DF, MexicoUniv La Havana, IMRE, Fac Fis, La Havana, CubaInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoMorales-Acevedo, A, IPN, CINVESTAV, Dept Elect Engn, SEES, Avenida IPN 2508, Mexico City 07360, DF, Mexico TI - Structural and optical properties of (ZnO)(x)(CdO)(1-x) thin films obtained by spray pyrolysis AB - Thin films of (ZnO)(x)(CdO)(1-x) oxides were deposited on glass substrates by spray pyrolysis and annealed in air at 450 degreesC. The structural and optical properties of the as-grown and thermally annealed thin films are presented. The crystalline structure was studied by X-ray diffraction (XRD) having found the presence of the CdO cubic phase pattern for low Zn concentrations and a mixing of cubic-CdO and hexagonal-ZnO phases for low Cd concentrations. The crystallinity of all samples improves with the thermal annealing. The optical band-gap was also studied from the optical transmittance for the as-grown and annealed samples. As expected, the band-gap changes between that for pure CdO and that for ZnO. (C) 2000 Elsevier Science S.A. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900052 L2 - spray pyrolysis;X-ray diffraction;thermal annealing SO - Thin Solid Films 2000 ;373(1-2):235-238 1807 UI - 15800 AU - Santana G AU - Morales-Acevedo A AU - Martel A AU - Hernandez L AD - IPN, Ctr Invest & Estudios Avanzados, Dept Ingn Elect, Mexico City 07360, DF, MexicoUniv La Habana, Fac Fis, IMRE, La Habana 10400, CubaCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoMorales-Acevedo, A, IPN, Ctr Invest & Estudios Avanzados, Dept Ingn Elect, Mexico City 07360, DF, Mexico TI - Gettering effects by aluminum upon the dark and illuminated I-V characteristics of N+-P-P+ silicon solar cells AB - Impurity gettering is an essential process step in silicon solar cell technology. A widely used technique to enhance silicon solar cell performance is the deposition of an aluminum layer on the back surface of the cell, followed by a thermal annealing. The aluminum thermal treatment is typically done at temperatures around 600 degrees C for short times (10-30 min). Seeking a new approach of aluminum annealing at the back of silicon solar cells, a systematic study about the effect the above process has on dark and illuminated I-V cell characteristics is reported in this paper. We report results on silicon solar cells where annealing of aluminum was done at two different temperatures (600 degrees C and 800 degrees C), and compare the results for cells with and without aluminum alloying. We have shown that annealing of the aluminum in forming gas at temperatures around 800 degrees C causes improvement of the electrical cell characteristics. We have also made evident that for temperatures below similar to 250 K, the predominant recombination process for our cells is trap-assisted carrier tunneling for both annealing temperatures, but it is less accentuated for cells with annealing of aluminum at 800 degrees C, For temperatures above similar to 250 K, the recombination proceeds through Shockley-Read-Hall trap levels, for cells annealed at both temperatures. Furthermore, it seems from DLTS measurements that there is gettering of iron impurities introduced during the fabrication processes. The transport of impurities from the bulk to the back surface (alloyed with aluminum) reduces the dark current and increases the effective diffusion length as determined from dark I-V characteristics and from spectral response measurements, respectively. All these effects cause a global efficiency improvement for cells where aluminum is annealed at 800 degrees C as compared to conventional cells where the annealing was made at 600 degrees C. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000087661800003 L2 - aluminum gettering;silicon solar cells;I-V solar cells characteristics SO - Solar Energy Materials and Solar Cells 2000 ;62(4):369-378 1808 UI - 16694 AU - Santana G AU - Morales-Acevedo A AD - IPN, CINVESTAV, Dept Elect Engn, Mexico City 07360, DF, MexicoUniv La Habana, Fac Fis, IMRE, La Habana 10400, CubaMorales-Acevedo, A, IPN, CINVESTAV, Dept Elect Engn, Avenida IPN 2508, Mexico City 07360, DF, Mexico TI - Optimization of PECVD SiN : H films for silicon solar cells AB - We have grown silicon nitride (SiN:H) thin films on silicon and glass by the Plasma Enhanced Chemical Vapor Deposition (PECVD) Method at low temperature in order to study their electro-optical properties and correlate these properties to the chemical composition of the layers, so that optimum films may be achieved for silicon solar cells. By varying the silane to ammonia ratio in the plasma gas we have been able to modify the index of refraction, the optical band gap and the silicon surface state passivation properties of the films. From this information we have determined that the optimum silane to ammonia ratio, with other constant parameters in our system, should be 20/65. Our results indicate that the mid-gap surface state density in silicon can be reduced down to 10(10) cm(-2) eV(-1) when this optimum (silane to ammonia) ratio is used for depositing SiN:H layers. We have confirmed this optimal ratio by making quantum efficiency measurements on silicon solar cells having their emitter passivated with SiN:H layers deposited with different silane to ammonia ratios. A great reduction of the surface recombination velocity was achieved, as observed from the internal quantum efficiency measurements, for cells with optimal SiN:H layers as compared to those with non-optimum SiN:H layers. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000084094700004 L2 - silicon nitride thin films;PECVD method;silicon solar cells;NITRIDE SO - Solar Energy Materials and Solar Cells 2000 ;60(2):135-142 1809 UI - 15083 AU - Santana MA AU - Pedraza-Alva G AU - Olivares-Zavaleta N AU - Madrid-Marina V AU - Horejsi V AU - Burakoff SJ AU - Rosenstein Y AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoInst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Dept Inmunol Viral, Cuernavaca 62508, Morelos, MexicoAcad Sci Czech Republ, Inst Mol Genet, CR-14220 Prague, Czech RepublicHarvard Univ, Sch Med, Dana Farber Canc Inst, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Pediat, Boston, MA 02115, USARosenstein, Y, Univ Nacl Autonoma Mexico, Inst Biotecnol, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - CD43-mediated signals induce DNA binding activity of AP-1, NF-AT, and NF kappa B transcription factors in human T lymphocytes AB - Although numerous reports document a role for CD43 in T cell signaling, the direct participation of this molecule in cell activation has been questioned. In this study we show that CD43 ligation on human normal peripheral T cells was sufficient to induce interleukin-2, CD69, and CD40-L gene expression, without requiring signals provided by additional receptor molecules. This response was partially inhibited by cyclosporin A and staurosporine, suggesting the participation of both the Ca2+ and the protein kinase C pathways in CD43 signaling. Consistent with the transient CD43-dependent intracellular Ca2+ peaks reported by others, signals generated through the CD43 molecule resulted in the induction of NF-AT DNA binding activity. CD43-dependent signals resulted also in AP-1 and NF kappa B activation, probably as a result of protein kinase C involvement. AP-1 complexes bound to the AP-1 sequence contained c-Jun, and those bound to the NF-AT-AP-1 composite site contained c-Jun and Fos. NF kappa B complexes containing p65 could be found as early as 1 h after CD43 crosslinking, suggesting that CD43 participates in early events of T cell activation. The induction of the interleukin-a, CD69, and CD-40L genes and the participation of AP-1, NF-AT, and NF kappa B in the CD43-mediated signaling cascade implicate an important role for this molecule in the regulation of gene expression and cell function MH - Czech Republic MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 27 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000089762700100 L2 - WISKOTT-ALDRICH SYNDROME; CELL ACTIVATION; PROTEIN-KINASE; NUCLEAR FACTOR; SURFACE SIALOGLYCOPROTEIN; CD43 LEUKOSIALIN; GENE-EXPRESSION; CYCLOSPORINE-A; CROSS-LINKING; IL-2 GENE SO - Journal of Biological Chemistry 2000 ;275(40):31460-31468 1810 UI - 14660 AU - Santillan A AU - Kim JS AU - Franco J AU - Martos M AU - Hong SS AU - Ryu DS AD - Univ Nacl Autonoma Mexico, Gen Serv Comp Acad, Comp Aplicado Direcc, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoKorea Astron Observ, Taejon 305348, South KoreaSeoul Natl Univ, Dept Astron, Seoul 151742, South KoreaChungnam Natl Univ, Dept Astron & Space Sci, Taejon 305764, South KoreaSantillan, A, Univ Nacl Autonoma Mexico, Gen Serv Comp Acad, Comp Aplicado Direcc, Zona Cultural, Mexico City 04510, DF, Mexico TI - The Parker instability in a thick gaseous disk. II. Numerical simulations in two dimensions AB - We present two-dimensional, ideal-MHD numerical simulations of the Parker instability in a multicomponent warm disk model. The calculations were done using two numerical codes with different algorithms, TVD and ZEUS-3D. The outcomes of the numerical experiments performed with both codes are very similar and confirm the results of the linear analysis for the undular mode derived in a previous work: the most unstable wavelength is about 3 kpc and its growth timescale is between 30 and 50 Myr (the growth rate is sensitive to the position of the upper boundary of the numerical grid). Thus, the time and length scales of this multicomponent disk model are substantially larger than those derived for thin-disk models. We use three different types of perturbations, random, symmetric, and antisymmetric, to trigger the instability. The antisymmetric mode is dominant and determines the minimum time for the onset of the nonlinear regime. The instability generates dense condensations, and the final peak column density value in the antisymmetric case, as also derived by Kim and coworkers, is about a factor of 3 larger than its initial value. These wavelengths and density enhancement factors indicate that the instability alone cannot be the main formation mechanism of giant molecular clouds in the general interstellar medium. The role of the instability in the formation of large-scale corrugations along spiral arms is briefly discussed MH - Mexico|Distrito Federal MH - South Korea PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166018300033 L2 - instabilities;ISM : clouds;ISM : magnetic fields;ISM : structure;MHD;NONUNIFORM GRAVITATIONAL-FIELDS; INTERSTELLAR-MEDIUM; SOLAR ATMOSPHERE; MAGNETIC-FIELD; MAGNETOHYDRODYNAMIC FLOWS; HYDROSTATIC EQUILIBRIUM; STAR-FORMATION; GALACTIC DISK; GAS; EVOLUTION SO - Astrophysical Journal 2000 ;545(1):353-363 1811 UI - 15045 AU - Santillan M AU - Mahaffy JM AU - Belair J AU - Mackey MC AD - McGill Univ, Dept Physiol, Ctr Nonlinear Dynam Physiol & Med, Montreal, PQ H3G 1Y6, CanadaInst Politecn Nacl, Esc Sup Fis & Matemat, Mexico City 07738, DF, MexicoSan Diego State Univ, Dept Math Sci, San Diego, CA 92182, USAUniv Montreal, Dept Math & Stat, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaMcGill Univ, Dept Phys, Ctr Nonlinear Dynam Physiol & Med, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Math, Ctr Nonlinear Dynam Physiol & Med, Montreal, PQ H3G 1Y6, CanadaMackey, MC, McGill Univ, Dept Physiol, Ctr Nonlinear Dynam Physiol & Med, 3655 Drummond St,Room 1124, Montreal, PQ H3G 1Y6, Canada TI - Regulation of platelet production: The normal response to perturbation and cyclical platelet disease AB - An age-structured model for the regulation of platelet production is developed, and compared with both normal and pathological platelet production. We consider the role of thrombopoietin (TPO) in this process, how TPO affects the transition between megakaryocytes of various ploidy classes, and their individual contributions to platelet production. After the estimation of the relevant parameters of the model from both in vivo and in vitro data, we use the model to numerically reproduce the normal human response to a bolus injection of TPO. We further show that our model reproduces the dynamic characteristics of autoimmune cyclical thromobocytopenia if the rate of platelet destruction in the circulation is elevated to more than twice the normal value. (C) 2000 Academic Press MH - Canada MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 18 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000089957600009 L2 - C-MPL LIGAND; HEMATOPOIETIC STEM-CELLS; IN-VITRO; GROWTH-FACTOR; THROMBOPOIETIN; THROMBOCYTOPENIA; APOPTOSIS; ERYTHROPOIESIS; SURVIVAL; MODELS SO - Journal of Theoretical Biology 2000 ;206(4):585-+ 1812 UI - 15201 AU - Sarhy-Bagnon V AU - Lozano P AU - Saucedo-Castaneda G AU - Roussos S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoCtr Cooperat Int Rech Agron Dev, Unite Physicochim, BioMetro, F-34032 Montpellier, FranceUniv Aix Marseille 1, CESB, ESIL, Inst Rech Dev,Lab Microbiol, F-13288 Marseille, FranceSaucedo-Castaneda, G, Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, AP 55-535, Mexico City 09340, DF, Mexico TI - Production of 6-pentyl-alpha-pyrone by Trichoderma harzianum in liquid and solid state cultures AB - The aim of this work was to compare the production of 6-pentyl-alpha-pyrone (6-PP), a compound which has a strong coconut-like aroma, by Trichoderma harzianum in liquid and in solid state cultivation (LC and SSC). The same liquid medium was used to impregnate sugarcane pith bagasse, used as support in SSC. The maximum concentration of 6-PP produced by T. harzianum in SSC was 2.8 mg (g dry cell mass)(-1) equivalent to 0.9 g l(-1) of impregnation medium, which is 17 times higher than that obtained in LC. The glucose consumed to yield 6-PP in SSC was 52 mg (g glucose)(-1), eight times higher than that found in LC. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0032-9592 UR - ISI:000089385800015 L2 - solid state cultivation;liquid cultivation;coconut-like aroma;6-pentyl-alpha-pyrone;Trichoderma harzianum;FERMENTATION; VIRIDE SO - Process Biochemistry 2000 ;36(1-2):103-109 1813 UI - 14571 AU - Sarmiento-Franco L AU - MacLeod MG AU - Mcnab JM AD - Univ Autonoma Yucatan, Fac Vet Med & Anim Sci, Merida, Yucatan, MexicoRoslin Inst, Edinburgh, Midlothian, ScotlandSarmiento-Franco, L, Univ Autonoma Yucatan, Fac Vet Med & Anim Sci, Apdo Postal 4-116, Merida, Yucatan, Mexico TI - True metabolisable energy, heat increment and net energy values of two high fibre foodstuffs in cockerels AB - 1. The yields of true metabolisable energy (TME) and net energy (NE) from chaya leaf meal and wheatfeed were measured in tube-fed cockerels. 2. TME, 5.76 MJ/kg, from chaya leaf meal was lower than from wheatfeed, 8.39 MJ/kg. The total heat increment attributable to the feeding of chaya leaf meal was 1.7 times greater than that of wheatfeed. 3. The net efficiency of utilisation of ME (k) from chaya leaf meal was 0.64, while that from wheatfeed was 0.86. The role of different chemical composition, especially the high fibre content of the materials, is discussed. 4. The metabolisable energy and net energy values derived from chaya leaf meal represented 0.34 and 0.23 respectively of its gross energy content. The combination of lower TME and lower net efficiency of utilisation led to chaya having a NE value, 3.86 MJ/kg, which was only 0.53 that of wheatfeed MH - Mexico|Yucatan MH - United Kingdom PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0007-1668 UR - ISI:000166217100015 L2 - METABOLIZABLE ENERGY; BROILER-CHICKENS; DIETARY FIBER; LAYING HENS; FOOD-INTAKE; ENVIRONMENTAL-TEMPERATURE; GASTROINTESTINAL-TRACT; ABDOMINAL TEMPERATURE; ADULT COCKERELS; SOYBEAN-MEAL SO - British Poultry Science 2000 ;41(5):625-629 1814 UI - 15205 AU - Sarno MJ AU - Blase E AU - Galindo N AU - Ramirez R AU - Schirmer CL AU - Trujillo-Juarez DF AD - Vis Biotechnol Consulting, Escondido, CA, USACtr Estudios Endocrinol, Tijuana, MexicoSarno, MJ, 306 N W El Norte Pkwy,PMB 311, Escondido, CA 92026, USA TI - Clinical immunogenicity of measles, mumps and rubella vaccine delivered by the Injex jet injector: comparison with standard syringe injection AB - Background The measles, mumps and rubella (MMR) vaccine confers trivalent immunity in >90% of subjects immunized. Alternatives to the use of needles for vaccine administration have recently been made available. We report the safety and efficacy of MMR vaccine delivered by a new needle-free jet injector (Injex) compared with needle syringe administration. Methods. Forty adolescent subjects were injected bilaterally via needle syringe and jet injector with MMR vaccine and reconstitution buffer. Subjects were blinded as to which device contained the vaccine. Subjects were followed longitudinally for 12 weeks postimmunization, and titers to measles, mumps and rubella immunogens were determined by enzyme immunoassays, Injection pain was quantified using the visual analog pain scale, Results. Adverse events were mild and included injection site soreness (jet injector, 2.5% of subjects; needle, 12.5%), injection site bleeding (jet injector, 0%; needle, 7.5%), malaise (jet injector, 0%; needle, 5%) and fever (jet injector, 0%; needle, 2.5%), All subjects displayed measles titers significantly above baseline during the follow-up, Ninety-five percent of subjects displayed titers above baseline for the mumps antigen vs. 97.5% for rubella, No significant differences in immunogenicity were found between groups receiving the vaccine via the jet injector or the needle syringe at any time during the follow-up (P > 0.05), Injection pain scores were not significantly different between injector types (P > 0.05), Conclusions. We conclude that the measles, mumps and rubella vaccine can be safely and effectively delivered by the Injex jet injector, This device therefore provides an alternative to standard needle injection and a methodology that might reduce the risk of needle stick accidents MH - Mexico|Baja California MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000089431800005 L2 - Injex;measles;mumps;rubella;vaccine;jet injector;HEALTH-CARE WORKERS; CONVENTIONAL SYRINGE; CHILDREN; MIDAZOLAM; OUTBREAK; INSULIN SO - Pediatric Infectious Disease Journal 2000 ;19(9):839-842 1815 UI - 16273 AU - Sarsero JP AU - Merino E AU - Yanofsky C AD - Stanford Univ, Dept Biol Sci, Stanford, CA 94305, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62271, Morelos, MexicoYanofsky, C, Stanford Univ, Dept Biol Sci, Stanford, CA 94305, USA TI - A Bacillus subtilis gene of previously unknown function, yhaG, is translationally regulated by tryptophan-activated TRAP and appears to be involved in tryptophan transport AB - Computer analysis of the Bacillus subtilis genome sequence revealed a gene with no previously attributed function, yhaG, specifying a transcript containing a presumptive binding site for the tryptophan-activated regulatory protein, TRAP. The presumptive TRAP binding site overlaps the yhaG Shine-Dalgarno sequence and translation initiation region. TRAP was shown to regulate expression of yhaG translationally. Production of the yhaG transcript in vivo was found to compete for the binding of TRAP to other known TRAP binding sites. YhaG is likely to be a transmembrane protein involved in tryptophan transport MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 34 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000086205400036 L2 - BINDING ATTENUATION PROTEIN; TRP OPERON; LEADER RNA; EXPRESSION; TRANSCRIPTS; SEQUENCE; REPEATS SO - Journal of Bacteriology 2000 ;182(8):2329-2331 1816 UI - 16347 AU - Sarsero JP AU - Merino E AU - Yanofsky C AD - Stanford Univ, Dept Biol Sci, Stanford, CA 94305, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62271, Morelos, MexicoYanofsky, C, Stanford Univ, Dept Biol Sci, Stanford, CA 94305, USA TI - A Bacillus subtilis operon containing genes of unknown function senses tRNA(Trp) charging and regulates expression of the genes of tryptophan biosynthesis AB - Strains of Bacillus subtilis containing a temperature-sensitive tryptophanyl-tRNA synthetase produce elevated levels of the tryptophan pathway enzymes, when grown at high temperatures in the presence of excess tryptophan. This increase is because of reduced availability of the tryptophan-activated trp RNA-binding attenuation protein (TRAP). To test the hypothesis that this elevated trp gene expression was caused by the overproduction of a transcript capable of binding and sequestering TRAP, a computer program was designed to search the B, subtilis genome sequence for additional potential TRAP binding sites. A region containing a stretch of (G/A)AG trinucleotide repeats, characteristic of a TRAP binding site, was identified in the yczA -ycbK operon, We show that transcriptional regulation of the yczA -ycbK operon is controlled by the T-box antitermination mechanism in response to the level of uncharged tRNA(Trp), and that the presence of a trpS1 mutant allele increases production of the yczA-ycbK transcript. Elevated yczA-ycbK expression was shown to activate transcription of the trp operon. Deletion of the yczA-ycbK operon abolishes the trpS1 effect on trp gene expression. The purpose of increasing expression of the genes of tryptophan biosynthesis in the trpS mutant would be to provide additional tryptophan to overcome the charged tRNA(Trp) deficiency. Therefore, in B. subtilis, as in Escherichia coli, transcription of the tryptophan biosynthetic genes is regulated in response to changes in the extent of charging of tRNA(Trp) as well as the availability of tryptophan MH - Mexico|Morelos MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 39 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000085941400047 L2 - BINDING ATTENUATION PROTEIN; TRANSFER-RNA; GENOME SEQUENCE; TRP OPERON; LEADER RNA; TRAP; ANTITERMINATION; TRANSCRIPTS; TRANSLATION; SYNTHETASE SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(6):2656-2661 1817 UI - 16387 AU - Sarti E AU - Schantz PM AU - Avila G AU - Ambrosio J AU - Medina-Santillan R AU - Flisser A AD - Direcc Gen Epidemiol, Direcc Informac, Unidad Lomas Plateros, Secretaria Salud, Mexico City 01480, DF, MexicoCtr Dis Control & Prevent, Div Parasit Dis, Natl Ctr Infect Dis, Atlanta, GA, USAUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoInst Politecn Nacl, Escuela Med, Dept Posgrado, Mexico City, DF, MexicoSecretaria Salud, Inst Nacl Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoSarti, E, Direcc Gen Epidemiol, Direcc Informac, Unidad Lomas Plateros, Secretaria Salud, Francisco de P Miranda 177 Col, Mexico City 01480, DF, Mexico TI - Mass treatment against human taeniasis for the control of cysticercosis: a population-based intervention study AB - An intervention study with mass treatment against taeniasis to prevent neurocysticercosis due to Taenia solium in a rural community in Mexico was performed in 1991-96. Information and biological samples were obtained at the beginning of the study, at 6 months and at 42 months after mass treatment with praziquantel at a single dose of 5 mg/kg. Prevalence rates of taeniasis were measured by the detection of Taenia coproantigens and Taenia eggs in faeces; neurocysticercosis was suggested by clinical data and by serum antibodies in humans and also in swine. A reduction of 53% after 6 months and of 56% after 42 months for human taeniasis was seen after treatment. Late-onset general seizures decreased 70%. Anti-cysticercus antibodies in the human population were reduced by 75% after 42 months. Antibodies in pigs also showed a significant reduction of 55% after 6 months. In conclusion, an impact of mass chemotherapy against taeniasis to control cysticercosis in the short and long term was demonstrated. Praziquantel for tapeworm treatment should not be given at doses lower than 10 mg/kg. Late-onset convulsive crisis and specific antibodies are good indicators of neurocysticercosis and of exposure to the parasite, respectively MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 34 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000085825800028 L2 - taeniasis;Taenia solium;anti-cysticercus antibodies;cysticercosis;disease control;mass treatment;praziquantel;swine cysticercosis;Mexico;SOLIUM TAENIASIS; RURAL-COMMUNITY; PORCINE CYSTICERCOSIS; MEXICO; NEUROCYSTICERCOSIS; PREVALENCE; VILLAGE; PIGS SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2000 ;94(1):85-89 1818 UI - 13849 AU - Saucedo-Munoz ML AU - Watanabe Y AU - Shoji T AU - Takahashi H AD - Tohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 980, JapanESIQIE, Inst Politecn Nacl, Mexico City 07300, DF, MexicoTohoku Univ, Grad Sch Engn, Dept Machine Intelligence & Syst, Aoba Ku, Sendai, Miyagi 980, JapanSaucedo-Munoz, ML, Tohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 980, Japan TI - Effect of microstructure evolution on fracture toughness in isothermally aged austenitic stainless steels for cryogenic applications AB - Two types of austenitic stainless steels JJ1 and JN1 were isothermally aged at temperatures from 600 degreesC to 900 degreesC for 10-1000 min in order to study the microstructural evolution and its effect on fracture toughness at cryogenic temperatures. These steels were developed for applications in the superconducting magnets of a fusion experimental reactor by the Japan Atomic Energy Research Institute. The Charpy V-Notch (CVN) fracture energy at 77 K showed a significant decrease with aging time for both steels. The intergranular precipitation of carbides and nitrides is responsible for the fracture toughness deterioration. The scanning electron microscope (SEM) fractographs showed an intergranular brittle fracture and its fraction also increased with aging time and temperature. The presence of a more abundant intergranular precipitation resulted in a more rapid decrease in fracture toughness with aging time in JN 1 steel due to its higher content of C and N, compared to that of JJ 1 steel. The volume fraction of precipitates can be uniquely correlated with the reduction in toughness. (C) 2001 Elsevier Science Ltd. AH rights reserved MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Physics, Applied U5 - J;Article AV - English IS - 0011-2275 UR - ISI:000168298200003 L2 - austenitic stainless steels;fracture toughness;cryogenic;microstructure;PRECIPITATION; CR2N SO - Cryogenics 2000 ;40(11):693-700 1819 UI - 15219 AU - Saucedo-Munoz ML AU - Matsushita T AU - Hashida T AU - Shoji T AU - Takahashi H AD - Inst Politecn Nacl, Mexico City 07300, DF, MexicoIdemitsu Kosan Co Ltd, Tokyo, JapanTohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 980, JapanSaucedo-Munoz, ML, Inst Politecn Nacl, Apartado Postal 75-018, Mexico City 07300, DF, Mexico TI - Development of a multiple linear regression model to estimate the ductile-brittle transition temperature of ferritic low-alloy steels based on the relationship between small punch and Charpy V-notch tests AB - The transition temperatures of Cr-0.5Mo, Cr-Mo, and Cr-Mo-V steels were determined using the Charpy V-notch (CVN) and the small punch (SP) tests. It was confirmed that there was a linear correlation between the transition temperature of ductile-brittle behavior determined by the Charpy V-notch test and that obtained from the small punch test. However, the estimation of CVN transition temperature by means of this linear equation is not completely reliable because of the large experimental scatter of data. In order to improve the reliability of the transition temperature estimation, a multiple linear regression (MLR) analysis was conducted to evaluate the effect of different variables of the manufacturing process and service conditions. This analysis permitted the determination of the following regression equation: CVNDBTT = 1.35 SPDBTT - 0.84 x 10(3) d(-1/2) + 326. This equation enables one to assess more accurately the transition temperature corresponding to the Charpy V-notch test using that of the small punch test and the austenitic grain size, expressed by d(-1/2) MH - Japan MH - Mexico|Distrito Federal PB - W CONSHOHOCKEN: AMER SOC TESTING MATERIALS RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0090-3973 UR - ISI:000089443500003 L2 - mechanical tests;Charpy V-notch test;small punch test;ductile-brittle transition temperature;ferritic low-alloy steels;regression analysis;EMBRITTLEMENT; BEHAVIOR SO - Journal of Testing and Evaluation 2000 ;28(5):352-358 1820 UI - 15306 AU - Saunders W AU - Sutherland WJ AU - Maddox SJ AU - Keeble O AU - Oliver SJ AU - Rowan-Robinson M AU - McMahon RG AU - Efstathiou GP AU - Tadros H AU - White SDM AU - Frenk CS AU - Carraminana A AU - Hawkins MRS AD - Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandNucl & Astrophys Lab, Oxford OX1 3RH, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, EnglandMax Planck Inst Astrophys, D-85740 Garching, GermanyUniv Durham, Dept Phys, Durham DH1 3LE, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoSaunders, W, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - The PSCz catalogue AB - We present the catalogue, mask, redshift data and selection function for the PSCz survey of 15 411 IRAS galaxies across 84 per cent of the sky. Most of the IRAS data are taken from the Point Source Catalog, but this has been supplemented and corrected in various ways to improve the completeness and uniformity. We quantify the known imperfections in the catalogue, and we assess the overall uniformity, completeness and data quality. We find that overall the catalogue is complete and uniform to within a few per cent at high latitudes and 10 per cent at low latitudes. Ancillary information, access details, guidelines and caveats for using the catalogue are given MH - United Kingdom MH - Germany MH - Mexico|Puebla PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 183 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000089102800012 L2 - catalogues;surveys;galaxies : clusters : general galaxies : distances and redshifts;large-scale structure of Universe;REDSHIFT-SURVEY; IRAS GALAXIES; INFRARED-EMISSION; POWER SPECTRUM; DUST; MAPS SO - Monthly Notices of the Royal Astronomical Society 2000 ;317(1):55-63 1821 UI - 16290 AU - Sawyer RF AU - Harley RA AU - Cadle SH AU - Norbeck JM AU - Slott R AU - Bravo HA AD - Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USAUniv Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720, USAGM Corp, R&D, Hlth & Environm Dept, Warren, MI 48090, USAUniv Calif Riverside, CECERT, Riverside, CA 92521, USANatl Autonomous Univ Mexico, Ctr Ciencias Atmosfera, Secc Contaminat Ambiental, Mexico City 04510, DF, MexicoSawyer, RF, Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USA TI - Mobile sources critical review: 1998 NARSTO assessment AB - Mobile sources of air pollutants encompass a range of vehicle, engine, and fuel combinations. They emit both of the photochemical ozone precursors, hydrocarbons and oxides of nitrogen. The most important source of hydrocarbons and oxides of nitrogen are light- and heavy-duty on-road vehicles and heavy-duty off-road vehicles, utilizing spark and compression ignition engines burning gasoline and diesel respectively. Fuel consumption data provide a convenient starting point for assessing current and future emissions. Modern light-duty, gasoline vehicles when new have very low emissions. The in-use fleet, due largely to emissions from a small "high emitter" fraction, has significantly larger emissions. Hydrocarbons and carbon monoxide are higher than reported in current inventories. Other gasoline powered mobile sources (motorcycles, recreational vehicles, lawn, garden, and utility equipment, and light aircraft) have high emissions on a per quantity of fuel consumed basis, but their contribution to total emissions is small. Additional uncertainties in spatial and temporal distribution of emissions exist. Heavy-duty diesel vehicles are becoming the dominant mobile source of oxides of nitrogen. Oxides of nitrogen emissions may be greater than reported in current inventories, but the evidence for this is mixed. Oxides of nitrogen emissions on a fuel-consumed basis are much greater from diesel mobile sources than from gasoline mobile sources. This is largely the result of stringent control of gasoline vehicle emissions and a lesser (heavy-duty trucks) or no control (construction equipment, locomotives, ships) of heavy-duty mobile sources. The use of alternative fuels, natural gas, propane, alcohols, and oxygenates in motor vehicles is increasing but remains small. Vehicles utilizing these fuels can be but are not necessarily cleaner than their gasoline or diesel counterparts. Historical vehicle kilometers traveled growth rates of about 2% annually in both the United States and Canada will slow somewhat to about 1.5%. Mexican growth rates are expected to be greater. Fuel consumption growth in recent years of about 1.4% annually is projected to continue as slowing gains in fuel economy from fleet turnover are more than offset by growth and the increasing number of Sport Utility Vehicles. This growth also will erode the emissions reductions resulting from cleaner new vehicles and fuels. Uncertainties in these projections are high and affected by economic activity, demographics, and the effectiveness of emissions control programs - especially those for reducing in-use emissions. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 71 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Review AV - English IS - 1352-2310 UR - ISI:000086195600013 L2 - motor vehicle emissions;emissions inventory;mobile sources;in-use emissions;emissions uncertainties;TUSCARORA MOUNTAIN TUNNELS; VEHICLE EXHAUST EMISSIONS; ORGANIC AEROSOL FORMATION; FORT MCHENRY; CALCULATED REACTIVITIES; CARBON-MONOXIDE; MOTOR-VEHICLES; CALIFORNIA; INVENTORY; HYDROCARBONS SO - Atmospheric Environment 2000 ;34(12-14):2161-2181 1822 UI - 15189 AU - Scaloni A AU - Bottiglieri C AU - Ferrara L AU - Corona M AU - Gurrola GB AU - Batista C AU - Wanke E AU - Possani LD AD - CNR, Ctr Int Servizi Spettrometia Massa, IABBAM, I-80147 Naples, ItalyUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoUniv Milan, Dept Biotechnol & Biosci, I-20126 Milan, ItalyPossani, LD, CNR, Ctr Int Servizi Spettrometia Massa, IABBAM, I-80147 Naples, Italy TI - Corrigendum to: Disulfide bridges of Ergtoxin, a member of a new sub-family of peptide blockers of the ether-a-go-go-related K+ channel (FEBS 24007) (vol 479, pg 156, 2000) MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Correction AV - English IS - 0014-5793 UR - ISI:000089565500023 SO - Febs Letters 2000 ;481(3):308-308 1823 UI - 15538 AU - scencio-Gutierrez JA AU - Perez-Marin L AU - Otazo-Sanchez E AU - Castro M AU - Contreras-Pulido D AU - Cisneros GA AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv La Habana, Inst Mat & React, Havana, CubaUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca, Hidalgo, MexicoPerez-Marin, L, Inst Nacl Invest Nucl, Mexico City 11801, DF, Mexico TI - Molecular and quantum mechanics calculations for the 1-furoyl-3-phenylthiourea as a Pb2+ sensor AB - The geometry and electronic structure of 1-furoyl-3-phenylthiourea was calculated by means of the DGauss program, which is a density functional theory based method. The performed calculations were of the all-electron type at the local spin density level of theory. Orbital basis sets of DZVP2 quality were used for the H, C, N, O, and S atoms. The frontier molecular orbitals, the so-called HOMO and LUMO levels, were determined. They account for the observed selectivity reactions of this molecule towards Pb2+ ions. Moreover, the localization of the HOMO and a high negative charge over the sulfur center reveal the softness of the active sulfur site. Indeed, a metal-sulfur attachment, accounts for the observed electrochemical properties such as ion selective electrode (ISE) towards Pb2+. The calculated structural parameters, bond lengths and bond angles, are in agreement with theoretical results reported for similar molecules as this sensor. Our calculations indicate the presence of a hydrogen O-H-N bond, which is in agreement with spectroscopic observations MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Hidalgo PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0001-9704 UR - ISI:000088589800003 L2 - quantum mechanics calculations;1-furoyl-3-phenylthiourea;Pb2+ sensor;the frontier molecular orbitals;density functional theory (DFT);molecular recognition;reactivity;DENSITY SO - Afinidad 2000 ;57(487):180-184 1824 UI - 16142 AU - Schaaf P AU - Bohnel H AU - Perez-Venzor JA AD - Univ Nacl Autonoma Mexico, Inst Geofis, LUGIS, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, UNICIT, Queretaro 76230, MexicoUniv Autonoma Baja California, Dept Geol, La Paz, Baja Calif Sur, MexicoSchaaf, P, Univ Munich, Inst Mineral Petrol & Geochem, Theresienstr 41, D-80333 Munich, Germany TI - Pre-Miocene palaeogeography of the Los Cabos Block, Baja California Sur: geochronological and palaeomagnetic constraints AB - The Los Cabos Block (LCB) is located at the southern end of the Baja California peninsula and is composed mainly of intrusive rocks that were emplaced into pre-Cretaceous heterogeneous metasediments and are partly covered by Miocene volcanic and volcaniclastic rocks. Field observations provide evidence that the undeformed, homogeneous gabbronorite of the Sierra El Novillo in the NE part of the LCB is the oldest crystalline unit, which is intruded by undeformed to slightly deformed tonalitic-quartz-dioritic granitoids. For these rocks an Rb-Sr intrusion age of 129 +/- 15 Ma and a biotite whole-rock cooling age of 116 +/- 2 Ma were obtained. Low initial Sr-87/Sr-86 and high epsilon-Nd values of about 0.7036 and +5 to -6 respectively characterise the intrusives as primitive, mantle-derived granites. Further to the southeast and south, granitoids are more silicic, with abundant deformed sequences - orthogneisses, diatexites and migmatites, among others. From the southern part of the LCB an Rb-Sr intrusion age for the undeformed granites of 115+/-4 Ma and a biotite cooling age of 90+/-2 Ma were determined. Initial 87Sr/86Sr was determined to be 0.7054 and epsilon-Nd values fall between -2 and 0. The isotopic data do not clearly allow us to characterise the deformed granitoids of the LCB as being intruded by the undeformed unit. Deformation could have been partly due to syn-intrusive tectonics. Palaeomagnetic data suggest minor, if any, northward displacement of the LCB with respect to continental. Mexico, corresponding to the rifting in the Gulf of California since the late Miocene, and significant 35-45 degrees clockwise rotations. Possible tilting effects, which may have occurred given the dip of Tertiary volcanics on top of the intrusives, would modify these values for rotation and to a lesser degree of northward displacement. Geochemical, isotopic and palaeomagnetic results and the cooling history of the LCB are similar to those from the Puerto Vallarta Batholith, whereas other Mexican continental margin plutons further to the SE display lower intrusion ages, more rapid cooling rates and generally more primitive magma compositions. In the light of the data presented, a common magmatic evolution of the LCB and the Puerto Vallarta Batholith is strongly suggested. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000086576700004 L2 - Baja California;geochronology;palaeogeography;palaeomagnetism;GRANITIC-ROCKS; NORTH-AMERICA; MEXICO; ROTATION; PALEOMAGNETISM; EXTENSION SO - Tectonophysics 2000 ;318(1-4):53-69 1825 UI - 16432 AU - Schmitz SFH AU - Castillo-Chavez C AD - Univ Bern, Inst Stat Math, CH-3012 Bern, SwitzerlandCornell Univ, Dept Biometr, Ithaca, NY 14853, USACornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853, USAUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, MexicoSchmitz, SFH, Univ Bern, Inst Stat Math, Sidlerstr 5, CH-3012 Bern, Switzerland TI - A note on pair-formation functions AB - In this paper, we take a closer look at two harmonic mean functions [1,2] and two minimum functions (moving dominance function [3] and group-specific minimum function), in two-sex multigroup populations. Comparisons between these functions are focused on proportionate mixing. We show that under some special conditions, the two harmonic mean functions are identical; and under the mixing framework of Castillo-Chavez and Busenberg [4], the two minimum functions are also identical (for both proportionate and nonproportionate mixing). Simulations of a simple demographic model with the four functions are also performed to confirm the above mentioned identity and to illustrate the behavior of these functions. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000085610100012 L2 - pair formation;marriage function;harmonic mean;minimum function;two-sex population;TRANSMISSION DYNAMICS; POPULATIONS; MODELS; HIV; AGE SO - Mathematical and Computer Modelling 2000 ;31(4-5):83-91 1826 UI - 14629 AU - Schnaas L AU - Rothenberg SJ AU - Perroni E AU - Martinez S AU - Hernandez C AU - Hernandez RM AD - Charles R Drew Univ Med & Sci, Dept Anesthesiol MP10, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Perinatol, Dept Dev Neurobiol, Mexico City, DF, MexicoNatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoRothenberg, SJ, Charles R Drew Univ Med & Sci, Dept Anesthesiol MP10, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Temporal pattern in the effect of postnatal blood lead level on intellectual development of young children AB - To determine the temporal pattern of the effect of postnatal blood lead level on the General Cognitive Index (GCI) of the McCarthy Scales of Children's Abilities, we used data from 112 children of the Mexico City Prospective Lead Study with complete evaluations from 36 to 60 months of age at 6-month intervals. We measured blood lead level every 6 months from 6 to 54 months. We controlled for 5-min Apgar, birth weight, birth order, sex, socioeconomic level, maternal IQ, and maximum maternal educational level in a repeated measures ANCOVA using child blood lead level grouped by 6-18 month (geometric mean 10.1 mug/dl, range 3.5-37.0 mug/dl), 24-36 month (geometric mean 9.7 mug/dl, range 3.0-42.7 mug/dl), and 42-54 month (geometric mean 8.4 mug/dl, range 2.5-44.8 mug/dl) averages. There were significant interactions between the 6-18 month blood lead level and age with GCI as the endpoint and between 24-36 month blood lead level and age. The regression coefficient of blood lead at 6-18 months became more negative with age until 48 months, when the rate of decline moderated (linear polynomial contrast p = 0.047). The regression coefficient of blood lead at 24-36 months with CGI became more negative as well from 36 to 38 months but then started decreasing toward zero from 48 to 60 months (quadratic polynomial contrast p = 0.019). Significant between-subjects lead effects on GCI were found for 24-36 month blood lead level at 48 months (p = 0.021) and at 54 months (p = 0.073). The greatest effect (at 48 months) was a 5.8-point GCI decrease with each natural log unit increase in blood lead. Significant between subjects lead effects on GCI were found for 42-54 month blood lead level at 54 months (p = 0.040) and at 60 months (p = 0.060). The effect of postnatal blood lead level on GCI reaches its maximum approximately 1-3 years later, and then becomes less evident. Four to five years of age appears to be a critical period for the manifestation of the earlier postnatal blood lead level effects. (C) 2000 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Neurosciences;Toxicology U5 - J;Article AV - English IS - 0892-0362 UR - ISI:000166006500002 L2 - blood lead level;Pb;intelligence;development;child;PORT-PIRIE COHORT; EARLY PRESCHOOL PERIODS; AGE 4 YEARS; COGNITIVE-DEVELOPMENT; ENVIRONMENTAL EXPOSURE; INTELLIGENCE; CHILDHOOD; CONSEQUENCES SO - Neurotoxicology and Teratology 2000 ;22(6):805-810 1827 UI - 16593 AU - Schoenbeck MA AU - Temple SJ AU - Trepp GB AU - Blumenthal JM AU - Samac DA AU - Gantt JS AU - Hernandez G AU - Vance CP AD - Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108, USAUniv Minnesota, Dept Soil Water & Climate, St Paul, MN 55108, USAUniv Minnesota, Dept Plant Pathol, St Paul, MN 55108, USAUniv Minnesota, Dept Plant Biol, St Paul, MN 55108, USAUNAM, Ctr Invest Fijac Nitrogeno, Morelos CP 62271, MexicoARS, USDA, Plant Sci Res Unit, St Paul, MN 55108, USAVance, CP, Univ Minnesota, Dept Agron & Plant Genet, 411 Borlaug Hall,1991 Upper Buford Circle, St Paul, MN 55108 USA TI - Decreased NADH glutamate synthase activity in nodules and flowers of alfalfa (Medicago sativa L.) transformed with an antisense glutamate synthase transgene AB - Legumes obtain a substantial portion of their nitrogen (N) from symbiotic N-2 fixation in root nodules, The glutamine synthetase (GS, EC 6.3.1.2)/glutamate synthase (GOGAT) cycle is responsible for the initial N assimilation. This report describes the analysis of a transgenic alfalfa (Medicago sativa L.) line containing an antisense NADH-GOGAT (EC 1.4.1.14) under the control of the nodule-enhanced aspartate aminotransferase (AAT-2) promoter. In one transgenic line, NADH-GOGAT enzyme activity was reduced to approximately 50%, with a corresponding reduction in protein and mRNA, The transcript abundance for cytosolic GS, ferredoxin-dependent GOGAT (EC 1,4,7,1), AAT-2 (EC 2.6.1.1), asparagine synthase (EC 6.3.5,4), and phosphoenolpyruvate carboxylase (PEPC, EC 4,1,1.31) were unaffected, as were enzyme activities for AAT, PEPC and GS. Antisense NADH-GOGAT plants grown under symbiotic conditions were moderately chlorotic and reduced in growth and N content, even though symbiotic N-2 fixation was not significantly reduced. The addition of nitrate relieved the chlorosis and restored growth and N content. Surprisingly, the antisense NADH-GOGAT plants were male sterile resulting from inviable pollen, A reduction in NADH-GOGAT enzyme activity and transcript abundance in the antisense plants was measured during the early stages of flower development. Inheritance of the transgene was stable and resulted in progeny with a range of NADH-GOGAT activity, These data indicate that NADH-GOGAT plays a critical role in the assimilation of symbiotically fixed N and during pollen development MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000084994300005 L2 - amino acid;nitrogen assimilation;pollen;CARBON-DIOXIDE FIXATION; NITROGEN-FIXATION; ROOT-NODULES; PHOSPHOENOLPYRUVATE CARBOXYLASE; AMMONIA ASSIMILATION; ARABIDOPSIS MUTANTS; SYNTHETASE ACTIVITY; GENE; EXPRESSION; PLANTS SO - Journal of Experimental Botany 2000 ;51(342):29-39 1828 UI - 16664 AU - Scholz T AU - Salgado-Maldonado G AD - IPN, CINVESTAV, Parasitol Lab, Merida 97310, Yucatan, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicScholz, T, IPN, CINVESTAV, Parasitol Lab, Unidad Merida,Carretera Antigua Progreso Km 6,AP, Merida 97310, Yucatan, Mexico TI - The introduction and dispersal of Centrocestus formosanus (Nishigori, 1924) (Digenea : Heterophyidae) in Mexico: A review AB - The taxonomy, distributional history, present occurrence, life-cycle, morphology of developmental stages and epizootiology of the heterophyid trematode Centrocestus formosanus (Nishigori, 1924) in Mexico are reviewed. This parasite was most likely introduced to Mexico with the importation of the first intermediate host, the thiarid snail Melanoides tuberculata, from Asia in 1979. Centrocestus formosanus was first recorded in 1985 as metacercariae in fry of the first generation of black carp Mylopharyngodon piceus imported from China and subsequently in other fish from a farm in central Mexico. Since that time the trematode has spread rapidly over a wide area which includes central Mexico and both the Atlantic and Pacific coasts. This rapid spread has apparently been enabled by previous propagation of M. tuberculata in Mexico. Metacercariae of C. formosanus occur encysted on the gills of fish. They have been found in 39 species of fish of the families Atherinidae, Characidae, Cichlidae, Cyprinidae, Eleotridae, Gobiidae, Goodeidae, Ictaluridae, Mugilidae and Poeciliidae from 11 Mexican states (Colima, Guanajuato, Hidalgo,Jalisco, Michoacan, Morelos, San Luis Potosi, Sonora, Tabasco, Tamaulipas and Veracruz). The heron Butorides striatus is the only known natural definitive host in Mexico. Further research towards better understanding of all aspects of the life cycle, transmission, host-parasite relationships and the effective control of C. formosanus in Mexico is necessary. It should also include monitoring of the present distribution of hi. tuberculata and its infection with larval stages of C. formosanus. Much more emphasis should be given to histopathological studies to assess actual impact of the parasite on fish of differ-ent species and age classes. Thr spectrum of natural definitive hosts and their epizootiological importance in the transmission and maintenance of the parasite in Mexico should also be better documented. Adequate preventive and control measures should be applied in aquaculture, with emphasis given to prevention of movement of infected fish stocks MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - NOTRE DAME: AMER MIDLAND NATURALIST RP - NOT IN FILE U3 - TC 16 U4 - Biodiversity Conservation;Ecology U5 - J;Review AV - English IS - 0003-0031 UR - ISI:000084690600015 L2 - SNAIL MELANOIDES-TUBERCULATA; FRESH-WATER FISHES; YUCATAN PENINSULA; LARVAL STAGES; METACERCARIAE; TREMATODES; PARASITES SO - American Midland Naturalist 2000 ;143(1):185-200 1829 UI - 15619 AU - Schunck FE AU - Mielke EW AD - Univ Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoSchunck, FE, Univ Cologne, Inst Theoret Phys, D-50923 Cologne, Germany TI - Eigenvalues of the Stewart-Lyth equation for inflation with a blue spectrum AB - By using the rather stringent nonlinear second order slow-roll approximation, we reconsider the nonlinear second order Abel equation of Stewart and Lyth. We determine a new blue eigenvalue spectrum. Some of the discrete values of the spectral index n(s) have consistent fits to the cumulative COBE data as well as to recent ground-base CMB experiments. (C) 2000 Published by Elsevier Science B.V MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000088239800031 L2 - inflation;scalar field potential;COPE;H-formalism;PERTURBATION; 2ND-ORDER; RECONSTRUCTION; DYNAMICS SO - Physics Letters B 2000 ;485(1-3):231-238 1830 UI - 15589 AU - Schwander SK AU - Torres M AU - Carranza C AU - Escobedo D AU - Tary-Lehmann M AU - Anderson P AU - Toossi Z AU - Ellner JJ AU - Rich EA AU - Sada E AD - Case Western Reserve Univ, Dept Med, Div Infect Dis, Cleveland, OH 44106, USAUniv Hosp Cleveland, Cleveland, OH 44106, USANatl Inst Resp Dis, Dept Microbiol, Mexico City, DF, MexicoNatl Inst Resp Dis, Bronchoscopy Serv, Mexico City, DF, MexicoCase Western Reserve Univ, Dept Pathol, Cleveland, OH 44106, USAState Serum Inst, Dept TB Immunol, Copenhagen, DenmarkSchwander, SK, Case Western Reserve Univ, Dept Med, Div Infect Dis, Biomed Res Bldg,Room 1001,10900 Euclid Ave, Cleveland, OH 44106 USA TI - Pulmonary mononuclear cell responses to antigens of Mycobacterium tuberculosis in healthy household contacts of patients with active tuberculosis and healthy controls from the community AB - Protective immunity against Mycobacterium tuberculosis requires CD4(+) lymphocyte-mediated immune responses and IFN-gamma activity. As the primary portal of entry of M, tuberculosis is the lung, pulmonary immune responses against multiple M, tuberculosis Ags were compared between both M, tuberculosis-exposed tuberculin skin test-positive healthy household contacts (HHC) of patients with active sputum smear and culture-positive tuberculosis and tuberculin skin test-positive healthy control individuals from the community (CC), Frequencies of M, tuberculosis Ag-specific IFN-gamma-producing cells, IFN-gamma concentrations in culture supernatants, and DNA synthesis in bronchoalveolar cells (BAC) and PBMC were studied in HHC (n = 10) and CC (n = 15), Using enzyme-linked immunospot assay we found higher frequencies of IFN-gamma-producing cells with specificity to M, tuberculosis-secreted Ag 85 (Ag 85) in BAC from HHC than in BAC from CC (p < 0.022) and relative to autologous PBMC, indicating compartmentalization of Ag 85-specific cells to the lungs. Further, IFN-gamma-producing cells with specificity to components A and B of Ag 85 were specifically compartmentalized to the lungs in HHC (p, < 0,05). IFN-gamma concentrations in culture supernatants of BAC and Ag-specific DNA synthesis were low and comparable in the two subject groups. Increased immune responses to Ag 85 at the site of repeated exposure to M, tuberculosis (the lung) may represent an important component of protective immunity against M, tuberculosis. Correlates of protective immunity against M, tuberculosis are required for assessment of the efficiency of antituberculous vaccines MH - Denmark MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 23 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000088340600041 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; GAMMA-INTERFERON PRODUCTION; HUMAN ALVEOLAR MACROPHAGES; CALMETTE-GUERIN INFECTION; DNA VACCINE; BOVIS BCG; LYMPHOCYTES; PROTEINS; GENE; IMMUNOGENICITY SO - Journal of Immunology 2000 ;165(3):1479-1485 1831 UI - 14392 AU - Sciutto E AU - Fragoso G AU - Fleury A AU - Laclette JP AU - Sotelo J AU - Aluja A AU - Vargas L AU - Larralde C AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirugia, Mexico City 14269, DF, MexicoUniv Limoges, Inst Epidemiol Neurol & Neurol Trop, F-87025 Limoges, FranceUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Mexico City 04510, DF, MexicoSciutto, E, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, AP70228, Mexico City 04510, DF, Mexico TI - Taenia solium disease in humans and pigs: an ancient parasitosis disease rooted in developing countries and emerging as a major health problem of global dimensions AB - This article reviews current knowledge on human and porcine cysticercosis caused by Taenia solium. It highlights the conditions favorable for its prevalence and transmission, as well as current trends in research on its natural history, epidemiology, immunopathology, diagnosis, treatment and prevention. Our opinions on the most urgent needs for further research are also presented. (C) 2000 Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Distrito Federal PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 66 U4 - Immunology;Microbiology;Virology U5 - J;Review AV - English IS - 1286-4579 UR - ISI:000166719500011 L2 - Taenia solium;cysticercosis-taeniasis;diagnosis;epidemiology;vaccination;pathogenesis;PARENCHYMAL BRAIN CYSTICERCOSIS; LINKED-IMMUNOSORBENT-ASSAY; IMMUNE-RESPONSE; MURINE CYSTICERCOSIS; CRASSICEPS CYSTICERCOSIS; PORCINE CYSTICERCOSIS; NEUROCYSTICERCOSIS; ANTIGENS; MEXICO; MICE SO - Microbes and Infection 2000 ;2(15):1875-1890 1832 UI - 14552 AU - Scrosati R AU - Serviere-Zaragoza E AD - NW Biol Res Ctr, CIBNOR, La Paz, Baja Calif Sur, MexicoScrosati, R, 2013 W 43rd Ave, Vancouver, BC V6M 2CS, Canada TI - Ramet dynamics for the clonal seaweed Pterocladiella capillacea (Rhodophyta): A comparison with Chondrus crispus and with Mazzaella cornucopiae (Gigartinales) AB - Little is known about the dynamics and the ecological interactions among ramets: (fronds) from populations of clonal red seaweeds. Small ramets are very difficult to tag, so their growth cannot be monitored directly, The temporal variation of the relationship between stand biomass and ramet density offers information on ramet performance. We calculated this relationship for an intertidal population of Pterocladiella capillacea (Gmelin) Santelices et Hommersand (Gelidiales) from Baja California, Mexico. Biomass and density were positively correlated on an annual basis, indicating that biomass accumulated without involving self-thinning among ramets, This contrasts with nonclonal seaweeds, for which self-thinning among individuals occurs during growth, but agrees with other clonal red seaweeds, such as Chondrus crispus Stackhouse and Mazzaella cornucopiae (Postels ef Ruprecht) Hommersand (both Gigartinales), The growth pattern for these members of the Gelidiales and of the Gigartinales holds despite differences in holdfast morphology and ramet branching degree and despite differences in the capacity of coalescence during early stages, known only for the Gigartinales, The positive slope for the dynamic biomass-density relationship, on a bilogarithmic scale, was statistically steeper for M, cornucopiae than For P. capillacea and for C, crispus. This suggests that the addition of new ramets during the growth season may be relatively more beneficial for biomass accumulation rates for M, cornucopiae, This would be expected for high-intertidal species subjected to strong abiotic stress, for which ramet crowding constitutes a key protection, Pterocladiella capillacea occurs at the mid-intertidal zone and C, crispus at the subtidal zone, so ramets would be relatively less important in that respect MH - Canada MH - Mexico|Baja California Sur PB - LAWRENCE: PHYCOLOGICAL SOC AMER INC RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-3646 UR - ISI:000166231900009 L2 - allometry;Chondrus;clonal;Gelidiales;Gigartinales;Mazzaella;population ecology;Pterocladiella;ramet;Rhodophyta;-3/2 POWER RULE; POPULATION-STRUCTURE; DENSITY-DEPENDENCE; STACKHOUSE BEDS; SOUTHERN GULF; ST-LAWRENCE; PLANT; SIZE; CANADA; REPRODUCTION SO - Journal of Phycology 2000 ;36(6):1061-1068 1833 UI - 16610 AU - Seba P AU - Rotter I AU - Muller M AU - Persson E AU - Pichugin K AD - Acad Sci Czech Republ, Inst Phys, Prague, Czech RepublicPedag Univ Hradec Kralove, Dept Phys, Hradec Kralove, Czech RepublicMax Planck Inst Phys Komplexer Syst, D-01187 Dresden, GermanyTech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, GermanyUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoSeba, P, Acad Sci Czech Republ, Inst Phys, Cukrovarnicka 10, Prague, Czech Republic TI - Collective modes in an open microwave billiard AB - Numerical calculations for a microwave Sinai billiard coupled strongly to a lead are performed as a function of the coupling strength between billiard and lead. They prove the formation of different time scales in an open quantum system at large coupling strength. The short-lived collective states are formed together with many long-lived trapped states MH - Czech Republic MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000084935200017 L2 - INTERFERING DOORWAY STATES; GIANT-RESONANCES; S-MATRIX; SCATTERING; POLES; STRENGTHS; SYSTEMS; RATES SO - Physical Review e 2000 ;61(1):66-70 1834 UI - 15409 AU - Segain JP AU - de la Bletiere DR AU - Bourreille A AU - Leray V AU - Gervois N AU - Rosales C AU - Ferrier L AU - Bonnet C AU - Blottiere HM AU - Galmiche JP AD - INRA, F-44035 Nantes, FranceCHU Nantes, Hotel Dieu, Ctr Rech Nutr Humaine, INSERM,U539, F-44035 Nantes 01, FranceINSERM, U463, F-44035 Nantes, FranceNatl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoGalmiche, JP, CHU Nantes, Hotel Dieu, Ctr Rech Nutr Humaine, INSERM,CRI 95 08, Pl A Ricordeau, F-44035 Nantes 01, France TI - Butyrate inhibits inflammatory responses through NF kappa B inhibition: implications for Crohn's disease AB - Background/aim-Proinflammatory cytokines are key factors in the pathogenesis of Crohn's disease (CD). Activation of nuclear factor kappa B (NF kappa B), which is involved in their gene transcription, is increased in the intestinal mucosa of CD patients. As butyrate enemas may be beneficial in treating colonic inflammation, we investigated if butyrate promotes this effect by acting on proinflammatory cytokine expression. Methods-Intestinal biopsy specimens, isolated lamina propria cells (LPMC), and peripheral blood mononuclear cells (PBMC) were cultured with or without butyrate for assessment of secretion of tumour necrosis factor (TNF) and mRNA levels. NF kappa B p65 activation was determined by immunofluorescence and gene reporter experiments. Levels of NF kappa B inhibitory protein (I kappa B alpha) were analysed by western blotting. The in vivo efficacy of butyrate was assessed in rats with trinitrobenzene sulphonic acid (TNBS) induced colitis. Results-Butyrate decreased TNF production and proinflammatory cytokine mRNA expression by intestinal biopsies and LPMC from CD patients. Butyrate abolished lipopolysaccharide (LPS) induced expression of cytokines by PBMC and transmigration of NF kappa B from the cytoplasm to the nucleus. LPS induced NF kappa B transcriptional activity was decreased by butyrate while I kappa B alpha levels were stable. Butyrate treatment also improved TNBS induced colitis. Conclusions-Butyrate decreases proinflammatory cytokine expression via inhibition of NF kappa B activation and I kappa B alpha degradation. These anti-inflammatory properties provide a rationale for assessing butyrate in the treatment of CD MH - France MH - Mexico|Distrito Federal PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 123 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0017-5749 UR - ISI:000088869800018 L2 - inflammation;butyrate;Crohn's disease;nuclear factor kappa B;cytokines;TUMOR-NECROSIS-FACTOR; INTESTINAL EPITHELIAL-CELLS; CHIMERIC MONOCLONAL-ANTIBODY; FACTOR-ALPHA; BOWEL-DISEASE; ULCERATIVE-COLITIS; MONONUCLEAR-CELLS; SHORT-TERM; TNF-ALPHA; CYTOKINES SO - Gut 2000 ;47(3):397-403 1835 UI - 16082 AU - Segers H AU - Rico-Martinez R AD - State Univ Ghent, Dept Biol, Lab Anim Ecol Zoogeog & Nat Conservat, B-9000 Ghent, BelgiumUniv Autonoma Aguascalientes, Ctr Ciencias Basicas, Aquascalientes 20100, Ags, MexicoSegers, H, State Univ Ghent, Dept Biol, Lab Anim Ecol Zoogeog & Nat Conservat, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - The male of Lecane bulla (Gosse, 1851): new support for the synonymy of Lecane Nitzsch, Monostyla Ehrenberg and Hemimonostyla Bartos AB - The hitherto unknown male of Lecane bulla (Gosse, 1851) is described and figured. It is generally similar to the few known males of other Lecane species. However, whereas the degree of fusion of the toes accords between male and female in other species, this is not the case here: the male of L. bulla has two separate and movable toes, these are completely fused into a single toe in the female. This observation further questions the validity of the taxonomic separation of Lecane in three taxa of generic rank, based on the degree of fusion of the toes. The behaviour and reproduction of Lecane is commented upon MH - Belgium MH - Mexico|Aguascalientes PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0022-2933 UR - ISI:000086843300003 L2 - Rotifera;Lecanidae;taxonomy;systematics;behaviour;ROTIFERA SO - Journal of Natural History 2000 ;34(5):679-683 1836 UI - 16132 AU - Segura-Puertas L AU - Lutz LL AU - Heimer-de la Cotera E AU - Burnett JW AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Cancun 77501, Q Roo, MexicoUniv Maryland, Dept Dermatol, Baltimore, MD 21201, USAUniv Nacl Autonoma Mexico, Ctr Neurobiol, Mexico City 04510, DF, MexicoSegura-Puertas, L, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, POB 1152, Cancun 77501, Q Roo, Mexico TI - Eruption caused by a deep-sea cnidarian MH - Mexico|Distrito Federal MH - Mexico|Quintana Roo MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Allergy;Dermatology U5 - J;Article AV - English IS - 0105-1873 UR - ISI:000086586000009 L2 - Cridaria;Siphonophora;Physonectae;deep-water marine organisms;occupational;seaman;cutaneous eruption;ANEMONE SO - Contact Dermatitis 2000 ;42(5):280-281 1837 UI - 16376 AU - Segura-Valdez L AU - Pardo A AU - Gaxiola M AU - Uhal BD AU - Becerril C AU - Selman M AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Illinois, Michael Reese Hosp, Chicago, IL, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoSelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502,Col Secc 16, Mexico City 14080, DF, Mexico TI - Upregulation of gelatinases A and B, collagenases 1 and 2, and increased parenchymal cell death in COPD AB - Background: A central feature in the pathogenesis of COPD is the inflammation coexisting with an abnormal protease/antiprotease balance. However, the possible role of different serine and metalloproteinases remains controversial. Patients and measurements: We examined the expression of gelatinases A and B (matrix metalloproteinase [MMP]-2 and MMP-9); collagenases 1, 2, and 3 (MMP-1, MMP-8, and MMP-13); as well as the presence of apoptosis in lung tissues of 10 COPD patients and 5 control subjects. In addition, gelatinase-h and gelatinase-B activities were assessed in BAL obtained from eight COPD patients, and from six healthy nonsmokers and sis healthy smoker control subjects. Setting: Tertiary referral center and university laboratories of biochemistry, and lung cell kinetics. Results: Immunohistochemical analysis of COPD lungs showed a markedly increased expression of collagenases 1 and 2, and gelatinases A and B, while collagenase 3 was not found. Neutrophils exhibited a positive signal for collagenase 2 and gelatinase B, whereas collagenase 1 and gelatinase A were revealed mainly in macrophages and epithelial cells. BAL gelatin zymography showed a moderate increase of progelatinase-A activity and intense bands corresponding to progelatinase B, In situ end labeling of fragmented DNA displayed foci of positive endothelial cells, although some alveolar epithelial, interstitial, and inflammatory cells also revealed intranuclear staining. Conclusion: These findings suggest that there is an upregulation of collagenase 1 and 2 and gelatinases A and B, and an increase in endothelial and epithelial cell death, which may contribute to the pathogenesis of COPD through the remodeling of airways and alveolar structures MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 141 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000085884000015 L2 - apoptosis;collagenases;COPD;emphysema;gelatinases;metalloproteinases;CIGARETTE SMOKERS; EXTRACELLULAR-MATRIX; PULMONARY-EMPHYSEMA; PERIPHERAL AIRWAYS; BASEMENT-MEMBRANE; EPITHELIAL-CELLS; BRONCHIAL-MUCOSA; RAT LUNGS; EXPRESSION; APOPTOSIS SO - Chest 2000 ;117(3):684-694 1838 UI - 15436 AU - Seifert G AU - Terrones H AU - Terrones M AU - Frauenheim T AD - Univ Gesamthsch Paderborn, D-33098 Paderborn, GermanyUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanySeifert, G, Univ Gesamthsch Paderborn, Warburger Str 100, D-33098 Paderborn, Germany TI - Novel NbS2 metallic nanotubes AB - The electronic properties and stability of NbS2 nanotubes have been studied using the Density-Functional-based Tight-Binding method. Optimizations of these structures confirm the stability of the tubes. We demonstrate that NbS2 nanotubes are all metallic with a high density of states at the Fermi level. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 69 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000088778400001 L2 - fullerenes;metals;nanostructures;superconductors;electronic band structure;FULLERENE-LIKE STRUCTURES; MICROTUBULES; CARBON SO - Solid State Communications 2000 ;115(12):635-638 1839 UI - 15706 AU - Seifert G AU - Terrones H AU - Terrones M AU - Jungnickel G AU - Frauenheim T AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUniv Gesamthsch Paderborn, D-33098 Paderborn, GermanyUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, Queretaro, MexicoMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyTerrones, H, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Structure and electronic properties of MoS2 nanotubes AB - Structural and electronic properties as well as the stability of MoS2 nanotubes art: studied using the density-functional-based tight-binding method. II is found that MoS2 zigzag (n, 0) nanotubes exhibit a narrow direct band gap and MoS2 armchair (n, n) possess a nonzero moderate direct gap. Interestingly the (n, n) tubes show a small indirect gap similar to the direct gap of (n,0) nanotubes. Simulated electron diffraction patterns confirm the existence of armchair and zigzag disulphide nanotubes. The structure of the MoS2 nanotube tips is explained by introducing topological defects which, produce positive and negative curvature MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 136 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000087959400037 L2 - FULLERENE-LIKE STRUCTURES; BORON-NITRIDE NANOTUBES; NANOPARTICLES; MICROTUBULES; MICROSCOPY; CARBON; WS2 SO - Physical Review Letters 2000 ;85(1):146-149 1840 UI - 16182 AU - Seifert G AU - Terrones H AU - Terrones M AU - Jungnickel G AU - Frauenheim T AD - Univ Gesamthsch Paderborn, D-33098 Paderborn, GermanyUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoSeifert, G, Univ Gesamthsch Paderborn, D-33098 Paderborn, Germany TI - On the electronic structure of WS2 nanotubes AB - Electronic properties of WS2 nanotubes have been studied using the Density Functional Based Tight Binding method (DFTB). We show that WS2 nanotubes are all semiconducting possessing a non zero moderate gap. Only for zig-zag (n, 0) nanotubes the band gap tends to vanish for very small tube diameters (< 10 Angstrom). The (n, n) tubes exhibit an indirect gap of similar size as the direct gap in (n, 0) nanotubes of comparable diameter. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 42 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000086375300002 L2 - nanostructures;semiconductors;electronic band structure;FULLERENE-LIKE STRUCTURES; BORON-NITRIDE NANOTUBES; CAGE STRUCTURES; MICROTUBULES; CARBON SO - Solid State Communications 2000 ;114(5):245-248 1841 UI - 15896 AU - Seijo JC AU - Caddy JF AD - Ctr Marista Estudios Super, Merida 97300, Yucatan, MexicoIPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97300, Yucatan, MexicoUN, Food & Agr Org, I-00100 Rome, ItalySeijo, JC, Ctr Marista Estudios Super, Perifer Norte Tablaje 13941 Carretera Merida Prog, Merida 97300, Yucatan, Mexico TI - Uncertainty in bio-economic reference points and indicators of marine fisheries AB - The design of intelligent management plans for marine fisheries requires recognition of the uncertainty of marine systems when assessing fishery performance through the use of bio-economic indicators. The uncertainty causing variability in the estimated values of the bio-economic indicators is incorporated through the use of Monte Carlo analysis to estimate the probability of exceeding limit reference points. To account for natural variability and other sources of uncertainty, estimates of appropriate fishery bio-economic indicators are needed in order to re-evaluate the fishery periodically and establish new reference points and corresponding management strategies. This paper concentrates on this aspect of the management process. It presents a classification of indicators in accordance with the level, change and structure framework. Alternative approaches to deal with risk and uncertainty in data-limited management contexts are discussed MH - Italy MH - Mexico|Yucatan PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 15 U4 - Fisheries;Limnology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1323-1650 UR - ISI:000087444100005 L2 - precautionary management;risk;decision theory;Monte Carlo analysis;limit and target reference points;bio-economic indicators;fuzzy theory SO - Marine and Freshwater Research 2000 ;51(5):477-483 1842 UI - 16414 AU - Seitz V AU - Garcia SO AU - Liston A AD - Free Univ Berlin, Klinikum Benjamin Franklin, Inst Pathol, D-12200 Berlin, GermanyNatl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USASeitz, V, Free Univ Berlin, Klinikum Benjamin Franklin, Inst Pathol, Hindenburgdamm 30, D-12200 Berlin, Germany TI - Alternative coding strategies and the inapplicable data coding problem AB - A comprehensive overview of the relationship of alternative coding strategies to the inapplicable data coding problem is presented. In contrast to Pleijel who argued that the presence/absence coding method (coding each observable feature as-a separate character) avoids problems with non-applicable states, we show that the problem of inapplicable data is the same, no matter whether observable features are coded-as separate characters or as two or more states of a character. The inapplicable data problem is concealed in presence/absence coding if the distinction between inapplicable and absent data is not made MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BERLIN: INT ASSOC PLANT TAXONOMY RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0040-0262 UR - ISI:000085663000006 L2 - HOMOLOGY ASSESSMENT; CHARACTERS SO - Taxon 2000 ;49(1):47-54 1843 UI - 16128 AU - Selman B AU - Ramos C AU - Montano M AU - Becerril C AU - Uhal B AU - Pardo A AD - Inst Nac Enfermedades Respiratorias, Mexico City 14080, DF, MexicoMichael Reese Hosp & Med Ctr, Cardiovasc Inst, Chicago, IL 60606, USANatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Fibroblasts from idiopathic pulmonary fibrosis (IPF) exhibit reduced growth rate, increased apoptosis, and express gelatinase B MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918103507 SO - Faseb Journal 2000 ;14(4):A606-A606 1844 UI - 15425 AU - Selman M AU - Ruiz V AU - Cabrera S AU - Segura L AU - Ramirez R AU - Barrios R AU - Pardo A AD - UNAM, Fac Ciencias, Mexico City 04000, DF, MexicoInst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoBaylor Coll Med, Dept Pathol, Houston, TX 77030, USAPardo, A, UNAM, Fac Ciencias, Apartado Postal 21-630, Mexico City 04000, DF, Mexico TI - TIMP-1,-2,-3, and-4 in idiopathic pulmonary fibrosis. A prevailing nondegradative lung microenvironment? AB - Fibroblast proliferation and extracellular matrix accumulation characterize idiopathic pulmonary fibrosis (IPF). We evaluated the presence of tissue inhibitor of metalloproteinase (TIMP)-1, -2, -3, and -4; collagenase-1, -2, and -3; gelatinases A and B; and membrane type 1 matrix metalloproteinase (MMP) in 12 IPF and 6 control lungs. TIMP-1 was found in interstitial macrophages and TIMP-2 in fibroblast foci. TIMP-3 revealed an intense staining mainly decorating the elastic lamina in vessels. TIMP-4 was expressed in IPF lungs by epithelial and plasma cells. TIMP-2 colocalized with Ki67 in fibroblasts, whereas TIMP-3 colocalized with p27 in inflammatory and epithelial cells. Collagenase-1 was localized in macrophages and alveolar epithelial cells, collagenase-2 was localized in a few neutrophils, and collagenase-3 was not detected. MMP-9 was found in neutrophils and subepithelial myofibroblasts. Myofibroblast expression of MMP-9 was corroborated in vitro by RT-PCR. MMP-2 was noticed in myofibroblasts, some of them close to areas of basement membrane disruption, and membrane type 1 MMP was noticed in interstitial macrophages. These findings suggest that in IPF there is higher expression of TIMPs compared with collagenases, supporting the hypothesis that a nondegrading fibrillar collagen microenvironment is prevailing MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 80 U4 - Physiology;Respiratory System U5 - J;Article AV - English IS - 1040-0605 UR - ISI:000088906900020 L2 - tissue inhibitor of metalloproteinases;gelatinases;collagenase;fibrosis;FIBROTIC HUMAN LUNGS; TISSUE INHIBITOR; MATRIX METALLOPROTEINASES; HYPERSENSITIVITY PNEUMONITIS; EXTRACELLULAR-MATRIX; CELL-DEATH; RAT LUNGS; IN-VITRO; COLLAGENASE; ACTIVATION SO - American Journal of Physiology-Lung Cellular and Molecular Physiology 2000 ;279(3):L562-L574 1845 UI - 15605 AU - Sen KD AU - Garza J AU - Vargas R AU - Vela A AD - Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, IndiaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoSen, KD, Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, India TI - Atomic ionization radii using Janak's theorem AB - Accurate calculations of the atomic ionization radius defined as the critical radius at which a spherically confined atom undergoes ionization are reported for the atoms He-Ca using the Kohn-Sham variational method in conjunction with the Slater transition state approximation to Janak's theorem of the density functional theory. (C) 2000 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000088366100005 L2 - DENSITY-FUNCTIONAL THEORY; DIRECT VARIATIONAL METHOD; HYDROGEN-ATOM; SPHERICAL BOX; ELECTRON; ENERGY; DISCONTINUITY; SYSTEMS; NUMBER SO - Chemical Physics Letters 2000 ;325(1-3):29-32 1846 UI - 16366 AU - Senent ML AU - Smeyers YG AU - Dominguez-Gomez R AU - Villa M AD - CSIC, Inst Estructura Mat, Dept Quim & Fis Teor, E-28006 Madrid, SpainUniv Politecn Madrid, EUIT Obras Publ, Catedra Quim, Dept Ingn Civil, Madrid 28014, SpainUAMI Purisima & Michoacan, Dept Quim, Mexico City 09340, DF, MexicoSenent, ML, CSIC, Inst Estructura Mat, Dept Quim & Fis Teor, Serrano 113 Bis, E-28006 Madrid, Spain TI - Ab initio determination of the far infrared spectra of some isotopic varieties of ethanol AB - The far infrared (FIR) spectra of various isotopic species of ethanol (-h(6), -d(1), and -d(3)) are analyzed from MP4((SDQT) ab initio calculations using models in one and two dimensions. From the calculated frequencies and intensities, previous assignments of ethanol-h(6) and -d(1) bands are reviewed. The position of several combination bands are predicted. Ethanol shows two conformers, trans and gauche, and two interacting torsional modes. The torsional barriers have been calculated to be V-3((trans)) = 1226.7 cm(-1), V-3((gauche)) = 1296.3 cm(-1), V-OH(alpha = 62 degrees) = 404.1 cm(-1), and V-OH(alpha = 180 degrees) = 423.3 cm(-1). The flexible models in one and two dimensions yields the same OH torsional frequencies, whereas they differ in the methyl group state calculations. The fundamental bands of the ethanol-h(6) have been evaluated at 205.5 cm(-1) (OH torsion) and 257.0 cm(-1) (CH3 torsion) and their corresponding intensities to be 18.650 x 10(-4) and 0.662 x 10(-4). (C) 2000 American Institute of Physics. [S0021-9606(00)51613-4] MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 17 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000085902300031 L2 - GAUCHE-ETHYL-ALCOHOL; CORRELATED MOLECULAR CALCULATIONS; MICROWAVE ROTATIONAL SPECTRUM; SUBMILLIMETER-WAVE SPECTRUM; GAUSSIAN-BASIS SETS; INTERNAL-ROTATION; MILLIMETER-WAVE; EXCITED-STATES; OH TORSION; GAS-PHASE SO - Journal of Chemical Physics 2000 ;112(13):5809-5819 1847 UI - 15561 AU - Sepulveda-Ahumada DR AU - Ortega-Rivas E AU - Barbosa-Canovas GV AD - Univ Chihuahua, Postgrad Programme Food Sci & Technol, Chihuahua, MexicoWashington State Univ, Dept Biol Syst Engn, Pullman, WA 99164, USA TI - Quality aspects of cheddar cheese obtained with milk pasteurized by pulsed electric fields AB - High voltage pulsed electric fields were used to pasteurize milk to obtain cheddar cheese. Two thermal pasteurization methods were also employed, and compared with the non-thermal treatment, in terms of some quality attributes of the derived cheeses. A cheese obtained from raw milk was used as the control. Some texture and sensory attributes were determined in order to verify whether the pulsed electric field treatment would produce a product of higher quality. Adhesiveness, cohesiveness, hardness and springiness, measured by a texture analyser, were the texture attributes compared. Hardness and springiness increased in cheese obtained using milk pasteurized by pulsed electric fields, while adhesiveness and cohesiveness were not significantly different (p < 0.05) between cheese obtained using milk pasteurized by pulsed electric fields and the equivalent processed from raw milk. Sensory scores showed significant differences (p < 0.001) between cheese obtained from milk pasteurized by pulsed electric fields and cheese obtained from raw milk. The use of milk pasteurized by high voltage pulsed electric fields to obtain cheese appeared to be a feasible option in order to improve quality of this important dairy product MH - Mexico|Chihuahua MH - USA PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0960-3085 UR - ISI:000088474000002 L2 - cheddar cheese;non-thermal pasteurization;texture and sensory attributes;high voltage pulsed electric fields;HEAT-TREATED MILK; MICROBIOLOGICAL SAFETY; FOOD PASTEURIZATION; ESCHERICHIA-COLI; INACTIVATION; MICROORGANISMS; TEXTURE SO - Food and Bioproducts Processing 2000 ;78(C2):65-71 1848 UI - 14720 AU - Seres I AU - Stepanov S AU - Mansurova S AU - Grabar A AD - Inst Nacl Astrofis Opt & ELect, Puebla 72000, MexicoUniv Autonoma Estado Morelos, Fac Ciencias Quim & Ingn, Cuernavaca 62210, Morelos, MexicoUzhgorod State Univ, Inst Solid State Phys & Chem, UA-294000 Uzhgorod, UkraineSeres, I, Inst Nacl Astrofis Opt & ELect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Non-steady-state photoelectromotive force effect in photorefractive Sn2P2S6 crystals AB - Results of experimental investigation of the non-steady-state photoelectromotive-force effect in ferroelectric photorefractive Sn2P2S6 crystals at a wavelength of 633 nm are reported. The dominating photoconductivity proved to be of the p type, with a diffusion length of photocarriers of similar to1 mum. This characteristic length proved to be shorter than the Debye-screening length evaluated as similar to3 mum in this crystal. The millisecond characteristic time of the space-charge grating formation was determined by the photoconductivity-relaxation time, which was found to be a Little bit longer than the dielectric-relaxation time. Both of them dropped sublinearly with increasing average light intensity in the investigated region I-0 similar or equal to 0.5-0.01 mW/mm(2). (C) 2000 Optical Society of America [S0740-3224(00)00611-1] OCIS codes: 160.5320, 160.5140, 040.5350 MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000165833400005 L2 - PHOTOCONDUCTIVITY; PHOTOCURRENTS; MANGANESE; FIELD SO - Journal of the Optical Society of America B-Optical Physics 2000 ;17(12):1986-1991 1849 UI - 14819 AU - Serkin VN AU - Hasegawa A AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72001, MexicoSoliton Commun, Higashiyama Ku, Kyoto 6050035, JapanSerkin, VN, Benemerita Univ Autonoma Puebla, Inst Ciencias, Apdo Postal 502, Puebla 72001, Mexico TI - Novel soliton solutions of the nonlinear Schrodinger equation model AB - The methodology developed provides for a systematic way to find an infinite number of the novel stable bright and dark "soliton islands" in a "sea of solitary waves" of the nonlinear Schrodinger equation model with varying dispersion, nonlinearity, and gain or absorption. It is shown that solitons exist only under certain conditions and the parameter functions describing dispersion, nonlinearity, and gain or absorption inhomogeneities cannot be chosen independently. Fundamental soliton management regimes are discovered MH - Japan MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 65 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000165399000023 L2 - DISPERSIVE DIELECTRIC FIBERS; OPTICAL PULSES; QUASI-SOLITON; TRANSMISSION; SYSTEMS; PROPAGATION SO - Physical Review Letters 2000 ;85(21):4502-4505 1850 UI - 15360 AU - Serkin VN AU - Hasegawa A AD - Russian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaUniv Autonoma Puebla, Puebla 72001, MexicoSoliton Commun, Higashiyama Ku, Kyoto 6050035, JapanSerkin, VN, Russian Acad Sci, Inst Gen Phys, Ul Vavilova 38, Moscow 117942, Russia TI - Soliton management in the nonlinear Schrodinger equation model with varying dispersion, nonlinearity, and gain AB - The novel stable "soliton islands" in a "sea of solitary waves" of the nonlinear Schrodinger equation model with varying dispersion, nonlinearity, and gain or absorption are discovered. Different soliton management regimes are predicted. (C) 2000 MAIK "Nauka/Interperiodica" MH - Japan MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 26 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0021-3640 UR - ISI:000089052100016 L2 - DIELECTRIC FIBERS; OPTICAL PULSES; TRANSMISSION; PROPAGATION SO - Jetp Letters 2000 ;72(2):89-92 1851 UI - 16409 AU - Serrano-Jaen L AU - Vega-Lopez F AD - Hosp Especialidades Dr Bernardo Sepulveda, Dept Dermatol & Med Mycol, Ctr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Mexico City 06725, DF, MexicoVega-Lopez, F, Middlesex Hosp, Dept Dermatol, Mortimer St, London W1N 8AA, England TI - Fulminating septicaemia caused by Vibrio vulnificus MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Dermatology U5 - J;Letter AV - English IS - 0007-0963 UR - ISI:000085737300041 L2 - MARINE VIBRIO; INFECTIONS SO - British Journal of Dermatology 2000 ;142(2):386-387 1852 UI - 13024 AU - Serrano MA AU - Carver DL AU - de Oca CM AD - Louisiana State Univ, Dept Comp Sci, Baton Rouge, LA 70803, USACtr Invest Matemat, Guanajuato 36000, Gto, MexicoSerrano, MA, Louisiana State Univ, Dept Comp Sci, Baton Rouge, LA 70803 USA TI - Mapping object-oriented systems to distributed systems using data mining techniques AB - We present a reengineering approach for decomposing existing object-oriented systems into subsystems that have low coupling and are suitable for distribution. We use reverse engineering techniques for the architectural and design recovery. We use object-oriented metrics techniques for the. assessment of relationships and interactions between object-oriented constructs such as classes, objects, and methods. Next, we use data mining techniques to discover associations in the underlying system and clustering techniques to create a hierarchical grouping of subsystems that is convenient for guiding the allocation of the subsystems to a hierarchical network. Finally, we efficiently allocate subsystems to different sites by mapping the hierarchical decomposition of subsystems to a hierarchical network representation. For the implementation, we use middleware technologies MH - Mexico|Guanajuato MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000170571100010 SO - Intelligent Problem Solving: Methodologies and Approaches, Prodeedings 2000 ;1821():79-84 1853 UI - 15537 AU - Serrano MF AU - Nieto LM AU - Moleon MCJ AD - Univ Granada, Dept Ingn Quim, E-18071 Granada, SpainUniv Jaen, Dept Ingn Quim, Jaen, SpainUniv Autonoma Estado Mexico, CIRA, Mexico City, DF, MexicoSerrano, MF, Univ Granada, Dept Ingn Quim, E-18071 Granada, Spain TI - Culture of Azetobacter vinelandii with acetate as carbon source under oxygen limitated conditions AB - We studied discontinuous and fed-batch cultures of Azotobacter vinelandii on acetate under oxygen limitation conditions, with the intention of using them as a Model System for the experimental study of oxygen transfer intensification methods in aerobic fermenters. Using a discontinuous culture, three series of experiments were carried out: one under the simplest conditions for the application of this system to an aerobic fermenter, with no pH control and under atmospheric nitrogen-fixing conditions; the other two series were performed with pH control and under atmospheric nitrogen-fixing conditions and with NH4Cl as the nitrogen source, respectively. We determined the overall kinetic parameters for both exponential growth and linear growth (with oxygen limitation). An increase in the stirring speed did'nt have influence on the specific growth rate but produced a higher specific oxygen and carbon source consumption rate. The nitrogen source was also seen to have an evident influence on the specific rate of consumption of the substrate, which was greater under nitrogen-fixing conditions. As regards the specific growth rate, A. vinelandii seems to prefer acetate to glucose and ammonia to atmospheric nitrogen. In a fed-batch culture, i.e. a discontinuous culture with acetate as the carbon source and using a concentrated solution of acetic acid to keep pH levels constant, two series of experiments were carried out. As the concentration of the carbon source was kept constant, we were able to analyse, independently, the damage suffered by the microorganism as it grew during variable time periods under oxygen limitation conditions. There was seen to be a diminution of mu when growth time under oxygen limitation conitions was increased MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - Spanish IS - 0001-9704 UR - ISI:000088589800001 L2 - Azobacter vinelandii;alginate;oxygen limitation;yield coefficients;growth rate;fed-batch culture;AZOTOBACTER-VINELANDII; DISSOLVED-OXYGEN; BATCH CULTURE SO - Afinidad 2000 ;57(487):167-174 1854 UI - 14845 AU - Shapiro NM AU - Gorbatov AV AU - Gordeev E AU - Dominguez J AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Tokyo, Earthquake Res Inst, Tokyo 113, JapanRussian Acad Sci, Geophys Serv, Petropavlovsk Kamchatski, RussiaShapiro, NM, Univ Colorado, Ctr Imaging Earths Interior, Campus Box 390, Boulder, CO 80309 USA TI - Average shear-wave velocity structure of the Kamchatka peninsula from the dispersion of surface waves AB - An average shear-wave velocity structure has been estimated for the path between the Kamchatka Isthmus and Petropavlovsk-Kamchatski. It is obtained from the Monte Carlo inversion of the Rayleigh and Love wave group velocity dispersion curves measured using broad-band seismograms of events in Northern Kamchatka recorded by the IRIS station PET in Petropavlovsk-Kamchatski. The Moho interface was found at a depth of 35+/-5 km and the Konrad one at 18+/-4 km. An important feature of the found structure is a low velocity in the upper mantle. This result is coherent with the recent and present-day volcanic activity in Kamchatka. Synthetic long period seismograms computed for the obtained structure are in good agreement with observed ones MH - USA MH - Japan MH - Mexico|Distrito Federal MH - Russia PB - TOKYO: TERRA SCIENTIFIC PUBL CO RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1343-8832 UR - ISI:000165461400001 L2 - MODELS SO - Earth Planets and Space 2000 ;52(9):573-577 1855 UI - 15696 AU - Shapiro NM AU - Campillo M AU - Margerin L AU - Singh SK AU - Kostoglodov V AU - Pacheco J AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City, DF, MexicoUniv Grenoble 1, UMR CNRS 5559, Lab Geophys Interene & Tectonophys, Grenoble, FranceShapiro, NM, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City, DF, Mexico TI - The energy partitioning and the diffusive character of the seismic coda AB - Following recent theoretical developments of the radiative transfer theory of elastic waves, we propose to use the ratio R of energies of curl and divergence part of the ground displacement to distinguish between the different possible dominant scattering regimes in the lithosphere. A consequence of the diffusion regime is the partitioning of the energy between different vibrational modes, which is independent of time. It results in the stabilization of R, This behavior is not expected if low-order diffraction (such as single scattering) is dominant. We apply our technique to seismograms recorded by a small-aperture seismic array operated during June-August 1997 in Guerrero (Mexico). We estimate the energy ratio R in the coda of 13 earthquakes recorded by the array. We find it to be very stable in the coda window, while the energy level itself changes by several orders of magnitude. The value of R is 7 +/- 1, independent of the earthquake location and the magnitude. The observed stabilization of R is a strong indication of the diffusive regime of the seismic coda MH - France MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 14 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000088170600008 L2 - WAVES; SCATTERING; FREQUENCY; ATTENUATION; ENVELOPE; MEXICO; ARRAY; MEDIA SO - Bulletin of the Seismological Society of America 2000 ;90(3):655-665 1856 UI - 16532 AU - Shapiro NM AU - Olsen KB AU - Singh SK AD - Natl Autonomous Univ Mexico, Inst Geofis, Dept Sismol & Volcanol, Mexico City 04510, DF, MexicoUniv Calif Santa Barbara, Inst Crustal Studies, Santa Barbara, CA 93106, USAShapiro, NM, Natl Autonomous Univ Mexico, Inst Geofis, Dept Sismol & Volcanol, Mexico City 04510, DF, Mexico TI - Wave-guide effects in subduction zones: evidence from three-dimensional modeling AB - We have simulated seismic wave propagation in models of the subduction zone off the Pacific coast of Mexico using a three-dimensional finite difference method. The results show that a significant part of the energy generated by earthquakes in the subduction zone can be trapped inside a wave-guide generated by the low-velocity material of the accretionary prism. The trapped waves in the simulations appear as long-duration wave-trains that follow the onset of the surface waves, similar to the signature of broadband seismograms recorded by stations along the Pacific coast of Mexico for subduction earthquakes MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 11 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000085204900035 L2 - SAN-ANDREAS FAULT; EARTHQUAKES; MEXICO SO - Geophysical Research Letters 2000 ;27(3):433-436 1857 UI - 15606 AU - Sharma VK AU - Hicks SD AU - Rivera W AU - Vazquez FG AD - Florida Inst Technol, Dept Chem, Orlando, FL 32801, USANatl Autonomous Univ Mexico, Inst Marine & Limnol, Mexico City 04510, DF, MexicoSharma, VK, Florida Inst Technol, Dept Chem, 150 W Univ Blvd, Orlando, FL 32801 USA TI - Hydrocarbon contamination in sediments of Nueces Bay, Texas MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000088403000016 L2 - POLYCYCLIC AROMATIC-HYDROCARBONS; CHEMICAL CONCENTRATIONS; ESTUARINE SEDIMENTS; LAGUNA MADRE; SOUTH TEXAS; MARINE; SALINITY; COASTAL; OYSTERS; TRENDS SO - Bulletin of Environmental Contamination and Toxicology 2000 ;65(2):253-260 1858 UI - 15869 AU - Sharma VK AU - Rendon RA AU - Millero FJ AU - Vazquez FG AD - Florida Tech, Dept Chem, Melbourne, FL 32901, USAUniv Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149, USANatl Autonomous Univ Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoSharma, VK, Florida Tech, Dept Chem, 150 W Univ Blvd, Melbourne, FL 32901 USA TI - Oxidation of thioacetamide by ferrate(VI) AB - The rates of thioacetamide oxidation with ferrate(VI) (Fe(VI)) were determined as a function of pH (9.14-12.00) and temperature (15-35 degrees C) in 0.01 M phosphate. The reaction was found to be first order for each reactant. The activation energy, Delta E-not equal, obtained was 59.7 +/- 0.7 kJ mol(-1). The rates decrease with an increase in pH. The stoichiometry determined was 8HFeO(4)(-)+ 3CH(3)CSNH(2) + 9H(2)O --> 8Fe(OH)(3) + 3CH(3)CONH(2), + 3SO(4)(2-)+ 2OH(-). A mechanism is proposed in which thioacetamide is oxidized by Fe(VI) in steps to sulfenyl, sulfinic, and sulfonic acid and finally to sulfate and acetamide. The comparison of results with other sulfur-containing compounds suggests that compounds undergo oxidation at S(-2) site by Fe(VI). (C) 2000 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0304-4203 UR - ISI:000087534100020 L2 - oxidation;thioacetamide;Fe(VI);PULSE-RADIOLYSIS; HYDROGEN-PEROXIDE; THIOUREA; MECHANISM; KINETICS; REACTIVITY; CATALYSIS; COMPLEXES; REMOVAL; SULFIDE SO - Marine Chemistry 2000 ;70(1-3):235-242 1859 UI - 16016 AU - Sharma VK AU - Rhudy KB AU - Cargill JC AU - Tacker ME AU - Vazquez FG AD - Texas A&M Univ, Dept Chem, Corpus Christi, TX 78412, USANatl Autonomous Univ Mexico, Inst Ciencias Mar Limnol, Mexico City 04510, DF, MexicoSharma, VK, Texas A&M Univ, Dept Chem, 6300 Ocean Dr, Corpus Christi, TX 78412 USA TI - Metals and grain size distributions in soil of the middle Rio Grande basin, Texas USA AB - This paper deals with the problem of increased heavy metal constituents in agricultural soils due to the expanded use of fertilizers and elevated atmospheric deposition. It discusses the extent of contamination in soil and establishes an environmental monitoring program in the chosen area of concern in the southern coastal region of Texas. Grain size, pH, and metals (Cu, Cd, Zn, Pb, Ni, Ba, As, Cr, Mn, and Pe) were determined in soils of the middle Rio Grande basin. The sails were mainly of sand texture and alkaline in character. Fine sand constituted the major proportion of the soil, and clay and silt ranged from 8-30% of the soil. Correlations of metal concentrations to grain size and iron contents were performed. Metals, except Cd and Pb, gave positive to negative relationships with decreases in grain size. Silt gave no relationship with metal content while clay and silt had a positive relationship. All these metals had a positive correlation with iron in the soil. The results indicate metals are associated with coarse sand, clay, and iron hydroxides surfaces of the soil. The comparison of metal content in soil of the middle Rio Grande basin with metals from other areas of the world suggests that it is relatively uncontaminated. areas of the world suggests that it is relatively uncontaminated MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000087047900022 L2 - metals;grain size;Rio Grande basin;contamination;TRACE-METALS; HEAVY-METAL; SEDIMENTS SO - Environmental Geology 2000 ;39(6):698-704 1860 UI - 15492 AU - Shepherd SA AU - Woodby D AU - Rumble JM AU - valos-Borja M AD - S Australian Res & Dev Inst, Henley Beach, SA 5022, AustraliaAlaska Dept Fish & Game, Douglas, AK 99824, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoShepherd, SA, S Australian Res & Dev Inst, Henley Beach, SA 5022, Australia TI - Microstructure, chronology and growth of the pinto abalone, Haliotis kamtschatkana, in Alaska AB - The microstructure, deposition of rings, and growth checks in the pinto abalone, Haliotis kamtschatkana Jonas, were examined at seven sites in southeast Alaska. Rings were of calcium carbonate with prismatic or block-like structure or were of organic material (called brown rings); sometimes both types were juxtaposed in a compound ring. Rings alternated with nacreous layers having a brick-like or laminar structure. Laminar thickness was correlated with ambient sea temperatures and provided internal evidence of periodicity of ring deposition. One ring a year appears to be deposited in the spire of this abalone in about mid-sumner, and a growth check is laid down at the growing edge of the shell in about mid-winter. Rates of deposition of the rings and growth checks were validated by comparison with known growth rates from mark-recapture experiments at one site, and modal analysis of length frequency data at others. Examination of a sample of shells of known age confirmed a deposition rate of one ring a year. Brown rings appear to be laid down adventitiously and were excluded from ring counts for aging purposes. The three independent techniques, rings, growth checks. and modal analysis, gave consistent juvenile growth rates at 7 sites of 14-18 mm/y during the first 4 y. Thereafter, growth rates followed a declining exponential curve. Growth rates differed little between sites, and mean parameters of fitted von Bertalanffy growth parameters for seven sites were: K = 0.20: L-infinity, = 125.9 mm MH - Australia MH - Mexico|Baja California MH - USA PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 6 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000088636000036 L2 - chronology;growth rings;growth checks;shell-aging;growth rates;abalone;Haliotis kamtschatkana;GENUS-HALIOTIS; SHELL; GASTROPODA SO - Journal of Shellfish Research 2000 ;19(1):219-228 1861 UI - 14644 AU - Sherman M AU - Dusheiko GM AU - Haeussinger D AU - Marinos G AU - Munoz-Espinoza L AU - Salmeron J AU - DePamphilis J AU - Brunda MJ AD - Toronto Gen Hosp, Toronto, ON, CanadaRoyal Free Hosp, London NW3 2QG, EnglandUniv Dusseldorf, D-4000 Dusseldorf, GermanyINSERM, Clichy, FrancePrince Wales Hosp, Randwick, NSW 2031, AustraliaUniv Hosp Dr Jose E Gonzalez, Monterrey, MexicoHoffmann La Roche Inc, Nutley, NJ 07110, USA TI - Superior virologic response in genotype 4 chronic hepatitis C patients treated with pegylated (40kDa) interferon alfa-2A (Pegasys (TM)) compared with standard interferon MH - Australia MH - Canada MH - United Kingdom MH - France MH - Germany MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 1 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000089622400742 SO - Hepatology 2000 ;32(4):348A-348A 1862 UI - 15778 AU - Sherwood GJ AU - Pollard JPJ AU - Bohnel H AD - Liverpool John Moores Univ, Sch Biol & Earth Sci, Liverpool L3 3AF, Merseyside, EnglandUNICIT, Inst Geofis, Juriquilla 76226, Qto, MexicoSherwood, GJ, Liverpool John Moores Univ, Sch Biol & Earth Sci, Byrom St, Liverpool L3 3AF, Merseyside, England TI - Magnetic mineralogy-ore microscopy and rock magnetic tests - Are they enough? MH - United Kingdom MH - Mexico|Queretaro PB - BRATISLAVA: SLOVAK ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1335-0552 UR - ISI:000087802400035 L2 - magnetic mineralogy;titanomagnetites;rock magnetism;reflected light microscopy;igneous petrology SO - Geologica Carpathica 2000 ;51(3):190-190 1863 UI - 14515 AU - Sheth HC AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoSheth, HC, Univ Hawaii, Sch Ocean & Earth Sci & Technol, Dept Geol & Geophys, Honolulu, HI 96822 USA TI - The timing of crustal extension, diking, and eruption of the Deccan flood basalts AB - A randomly oriented dike swarm in the Western Ghats region has been postulated to be the feeder dike swarm of the similar to2 km thick sequence exposed in that region of the Deccan province, and interpreted as evidence for the lack of crustal extension before this major flood basalt event. An enormous, central shield volcano has also been postulated in the same region based on flow stratigraphic studies and the randomly oriented dikes. These interpretations are subject to numerous objections and the lack of crustal extension before Deccan volcanism is not supported by presently available data. Rift zones of the province and the western Indian continental margin remain highly probable source areas for large volumes of the Deccan lavas MH - USA MH - Mexico|Morelos PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 7 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000166316800004 L2 - DYKE SWARMS; INDIA; EVOLUTION; VOLCANISM; TRAPS; GEOCHEMISTRY; EMPLACEMENT; STRESS; UPLIFT; REGION SO - International Geology Review 2000 ;42(11):1007-1016 1864 UI - 15988 AU - Shirokov AM AU - Smirnova NA AU - Smirnov YF AU - Castanos O AU - Frank A AD - Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, RussiaUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoShirokov, AM, Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia TI - IBM: Discrete symmetry viewpoint AB - It is shown that the set of transformations of the s and d boson operators that maintain the IBM-like form of the Hamiltonian comprises a discrete point symmetry group D-2.' The transformations manifest themselves as a parameter symmetry of the IBM-1 Hamiltonian. The transformations considered are also necessary for constructing the most general IBM-2 Hamiltonian. The properties of the potential energy surfaces arising in connection with these transformations are discussed. (C) 2000 MAIK "Nauka/lnterperiodica" MH - Mexico|Distrito Federal MH - Russia PB - WOODBURY: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7788 UR - ISI:000087083000032 L2 - INTERACTING BOSON MODEL SO - Physics of Atomic Nuclei 2000 ;63(4):695-699 1865 UI - 14868 AU - Shtinkov N AU - Vlaev SJ AU - Donchev V AD - Univ Sofia, Fac Phys, BG-1164 Sofia, BulgariaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, MexicoShtinkov, N, Univ Sofia, Fac Phys, 5 James Bourchier Blvd, BG-1164 Sofia, Bulgaria TI - Gamma-X coupling in diffused AlAs/GaAs superlattices MH - Bulgaria MH - Mexico|Zacatecas PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000165294600002 L2 - GAAS/ALAS SUPERLATTICES; ELECTRONIC-STRUCTURE; SEMICONDUCTORS SO - Physica Status Solidi B-Basic Research 2000 ;221(2):R9-R10 1866 UI - 15323 AU - Shtinkov N AU - Donchev V AU - Germanova K AU - Vlaev S AU - Ivanov I AD - Univ Sofia, Fac Phys, Sofia 1164, BulgariaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, ZAC, MexicoLinkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, SwedenShtinkov, N, Univ Sofia, Fac Phys, 5 James Bourchier Blvd, Sofia 1164, Bulgaria TI - Effect of non-abrupt interfaces in AlAs/GaAs superlattices with embedded GaAs quantum wells AB - In the present paper, we investigate the effect of the non-abrupt interfaces on the electronic and optical properties of short-period AlAs/GaAs superlattices with embedded GaAs quantum wells. The lateral disorder and the component interdiffusion at the interfaces are averaged over the layer planes and are effectively represented by a diffusion concentration profile in the growth direction. The diffusion length L-D is used as a parameter characterizing the degree of interface broadening. The electronic structure calculations are made using the sp3s* spin-dependent empirical tight-binding Hamiltonian, the virtual crystal approximation, and the surface Green function matching method. The dependencies of the lowest electron (E1), heavy hole (HH1), and light hole (LH1) bound states on the diffusion length are calculated for L-D from 0 to 4 monolayers. It is found that the energies of the transitions (E1-HH1) and (E1-LH1) increase as L-D increases. The results obtained are compared with photoluminescence data for MBE-grown samples. It is found that the degree of interface broadening depends on the growth temperature and on the sample geometry. The diffusion lengths calculated from the experimental data follow the expected trends, revealing a good qualitative agreement between theory and experiment. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Bulgaria MH - Mexico|Zacatecas MH - Sweden PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000089030800063 L2 - non-abrupt interfaces;AlAs/GaAs superlattices;embedded wells;tight-binding calculations;photoluminescence;ELECTRONIC STATES; HETEROSTRUCTURES; INTERDIFFUSION; ROUGHNESS SO - Vacuum 2000 ;58(2-3):561-567 1867 UI - 15446 AU - Shtinkov N AU - Vlaev SJ AU - Donchev V AU - Germanova K AD - Univ Sofia, Fac Phys, BG-1164 Sofia, BulgariaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, ZAC, MexicoShtinkov, N, Univ Sofia, Fac Phys, 5 J Bourchier Blvd, BG-1164 Sofia, Bulgaria TI - Electronic states of a superlattice with an enlarged quantum well: A tight-binding approach AB - We present a theoretical study of the energies and localizations of bound electronic states in a finite AlAs/GaAs superlattice (SL) with an enlarged centered GaAs quantum well (EW). The calculations are performed using a semi-empirical sp(3)s* spin dependent tight-binding model and the surface Green function matching technique. The behavior of the bound states at the Gamma-point of the two-dimensional Brillouin zone is studied for a wide range of EW widths. An interaction between states close in energy is found which leads to energy shifts and to changes in the localization and/or the orbital character of the interacting states. The conduction band structure is determined mainly by the interaction between SL and EW-localized states of equal parity. The valence band reveals a complex structure, dominated by the coupling between heavy and light hole states and the interaction between the states of different real space localization (SL or EW) MH - Bulgaria MH - Mexico|Zacatecas PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800025 L2 - SEMICONDUCTORS SO - Physica Status Solidi B-Basic Research 2000 ;220(1):153-157 1868 UI - 15851 AU - Shu FH AU - Laughlin G AU - Lizano S AU - Galli D AD - Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAUNAM, Inst Astron, Mexico City, DF, MexicoOsservatorio Astrofis Arcetri, I-50125 Florence, ItalyShu, FH, Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA TI - Singular isothermal disks. I. Linear stability analysis AB - As part of st larger effort to understand how binary and single stars form from the collapse of magnetized molecular cloud cores, we perform a global stability analysis of isopedically magnetized, singular isothermal disks (SIDs). The work described here has precedents in earlier studies of disturbances in power-law disks by Zang in 1976, Toomre in 1977, Lynden-Bell & Lemos in 1993, Syer & Tremaine in 1996, and Goodman & Evans in 1999. We find the analytic criteria for the bifurcation of axisymmetric disks into nonaxisymmetric forms with azimuthal periodicities m = I (eccentric displacements), 2 (oval distortions), 3 (triangular distortions), etc. These bifurcations, which occur at zero frequency, are the compressible and differentially rotating analogs of how the classical sequence of incompressible and uniformly rotating Maclaurin spheroids bifurcate (secularly, under dissipative forces) to become Dedekind ellipsoids with figure axes that remain fixed in space. Like Syer & Tremaine and Lynden-Bell & Lemos, Ne also find that zero-frequency logarithmic spirals are possible scale-free disturbances, but our interpretation of the existence of such steadily propagating wavetrains is different. We give a dynamical instability interpretation based on the onset of swing amplification by overreflection at the corotation circle of prograde spiral density waves the pattern speeds of which have nonzero and positive values. Our analysis yields identical instability criteria as the global normal-modes treatment of Goodman & Evans, and we tentatively also identify dynamical barred-spiral instabilities as the "breathing mode" limit of two-armed ordinary-spiral instabilities. We prove a general "reciprocity theorem," which states that the overreflection factors are identical for spiral density waves launched from cavities interior or exterior to Q-barriers that straddle the corotation circle. This globally valid result supports a unifying interpretation, advocated for many years by C. C. Lin and his colleagues (see, e.g., work by Bertin gr Lin): the coexistence of spiral structure in galaxies arising from the instability of internal normal modes in the combined star/gas disk or from driving by external tidal influences associated with the chance passages of companion bodies MH - USA MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 32 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087661900017 L2 - circumstellar matter;galaxies : spiral;hydrodynamics;instabilities;solar system : formation;ECCENTRIC GRAVITATIONAL INSTABILITIES; DENSITY WAVES; STAR FORMATION; GASEOUS DISKS; CLOUD CORES; SCALE-FREE; GG TAURI; GALAXIES; DISCS; CONFIGURATIONS SO - Astrophysical Journal 2000 ;535(1):190-210 1869 UI - 14632 AU - Shumilin E AU - Kalmykov S AU - Sapozhnikov D AU - Nava-Sanchez E AU - Gorsline D AU - Godinez-Orta L AU - Sapozhnikov Y AU - Quinones OH AU - Castaneda AR AD - Interdisciplinary Marine Sci Ctr, La Paz 23096, Baja Calif Sur, MexicoMoscow State Univ, Moscow, RussiaInst Geochem & Analyt Chem, Moscow, RussiaUniv So Calif, Los Angeles, CA 90089, USAShumilin, E, Interdisciplinary Marine Sci Ctr, La Paz 23096, Baja Calif Sur, Mexico TI - Major and trace element accumulation in coastal sediments along southeastern Baja California studied by instrumental neutron activation analysis and Pb-210 age-dating AB - The vertical distribution of K, Rb, Cs, Ca, Sr, Ba, Fe, Cr, Co,Ni, Zn, Sc, Zr, Sb, Se and As was studied by means of instrumental neutron activation analysis in four sediment cores collected from the eastern shelf of tectonically active Baja California peninsula accompanied by Pb-210 age-dating. Pb-210 analysis was performed by extraction chromatography with measuring the ingrowing daughter Bi-210 radioactivity by liquid-scintillation spectrometry. It was found that concentration variations of Se, As, Sb, Zr and Zn are probably controlled by the intensity and composition of the material supplied from the drainage basin constituted by volcanic and sedimentary rocks MH - Mexico|Baja California Sur MH - Russia MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000165958400008 SO - Journal of Radioanalytical and Nuclear Chemistry 2000 ;246(3):533-541 1870 UI - 16267 AU - Shvartsman SY AU - Theodoropoulos C AU - Rico-Martinez R AU - Kevrekidis IG AU - Titi ES AU - Mountziaris TJ AD - Princeton Univ, Dept Chem Engn, Princeton, NJ 08544, USAMax Planck Gesell, Fritz Haber Inst, D-1000 Berlin, GermanyInst Tecnol Celaya, Dept Ingn Quim, Guanajuato, MexicoUniv Calif Irvine, Dept Math, Irvine, CA 92717, USAUniv Calif Irvine, Dept Mech & Aerosp Engn, Irvine, CA 92717, USASUNY Buffalo, Dept Chem Engn, Buffalo, NY 14260, USATheodoropoulos, C, Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA TI - Order reduction for nonlinear dynamic models of distributed reacting systems AB - Detailed first-principles models of transport and reaction (based on partial differential equations) lead, after discretization, to dynamical systems of very high order. Systematic methodologies for model order reduction are vital in exploiting such fundamental models in the analysis, design and real-time control of distributed reacting systems. We briefly review some approaches to model order reduction we have successfully used in recent years, and illustrate their capabilities through (a) the design of an observer and stabilizing controller of a reaction-diffusion problem and (b) two-dimensional simulations of the transient behavior of a horizontal MOVPE reactor. (C) 2000 IFAC. Published by Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Guanajuato MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 13 U4 - Automation & Control Systems;Engineering, Chemical U5 - J;Article AV - English IS - 0959-1524 UR - ISI:000086132100010 L2 - distributed systems;model reduction;proper orthogonal decomposition;estimation;control;MOVPE;APPROXIMATE INERTIAL MANIFOLDS; FINITE-DIMENSIONAL CONTROL; PARABOLIC PDE SYSTEMS; STABILITY; EQUATIONS; FEEDBACK; DESIGN SO - Journal of Process Control 2000 ;10(2-3):177-184 1871 UI - 16635 AU - Sierra-Espinosa FZ AU - Bates CJ AU - O'Doherty T AD - Univ Wales, Sch Engn, Div Mech Engn & Energy Studies, Cardiff CF2 3TA, S Glam, WalesSierra-Espinosa, FZ, UNAM, Ctr Invest Energia, AP 34, Temixco 62580, Morelos, Mexico TI - Turbulent flow in a 90 degrees pipe junction Part 1. Decay of fluctuations upstream the flow bifurcation AB - A water flow at the inlet and downstream, before the bifurcation, of a 90 degrees tee pipe junction has been investigated. The tee junction bifurcates the flow of Reynolds number 1.26 x 10(5), based on the inlet bulk velocity and a pipe diameter of 50 mm, into a branch exit-to-inlet mass flow ratio Q(1)/Q(3) = 0.5. Predictions and measurements of the streamwise component of velocity conducted with laser Doppler anemometry compared well in general. However, the fact that the flow bifurcates downstream to 90 degrees causes the converged solution from three models for turbulence k-epsilon, renormalization group theory (RNG) and Reynolds stress model (RSM) to differ from each other. At the inlet the second moment normalised with respect to both the outer and inner scales of velocity, u(x) and u*, respectively, indicate non-symmetry, whereas the profiles of the streamwise component of velocity indicate symmetry. Downstream, close to the onset of flow bifurcation at the chamfer of the tee junction, the measured turbulence fluctuations damp down drastically within the inner and outer layers. The RSM model performs the best in reproducing the experimental data. Decay of turbulence has been observed also in U bends where measurements show typical behaviour of separation. In a separate paper the characteristics of the how at the branch exit of the tee are analysed. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Interdisciplinary Applications;Mechanics U5 - J;Article AV - English IS - 0045-7930 UR - ISI:000084826800004 L2 - turbulence modelling;turbulence fluctuations;laser Doppler;separation SO - Computers & Fluids 2000 ;29(2):197-213 1872 UI - 16636 AU - Sierra-Espinosa FZ AU - Bates CJ AU - O'Doherty T AD - Univ Wales, Sch Engn, Div Mech Engn & Energy Studies, Cardiff CF2 3TA, S Glam, WalesSierra-Espinosa, FZ, UNAM, Ctr Invest Energia, AP 34, Temixco 62580, Morelos, Mexico TI - Turbulent flow in a 90 degrees pipe junction Part 2: Reverse flow at the branch exit AB - The turbulence structure of a water flow in the branch exit of a tee pipe junction has been investigated experimentally and numerically. A mass flow rate branch exit-to-inlet ratio of 50% was used. The Reynolds number based on the inlet bulk mean velocity and the pipe diameter D = 50 mm was 1.26 x 10(5). The numerical solution was conducted employing three models for turbulence, k-epsilon, renormalization group theory (RNG) and Reynolds stress model, using a refined grid to model the smooth chamfer of radius, r = 0.25D as part of the physical tee junction. Within the branch exit the flow has a separation region with recirculation, which extends up to half of the diameter. In this paper the differences noticed between the numerical and experimental results and between the results from each model are discussed. The predicted recirculating flow was attached to the pipe wall up to 2.05D downstream from the separation region, contrary to the 0.65D experimentally observed. In the Vertical direction, the experimental data gave evidence that the near-wall flows are substantially asymmetric. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Interdisciplinary Applications;Mechanics U5 - J;Article AV - English IS - 0045-7930 UR - ISI:000084826800005 L2 - predicted turbulent flow;pipe flow;reattachment;backflow;laser Doppler;MODEL SO - Computers & Fluids 2000 ;29(2):215-233 1873 UI - 15028 AU - Sierra J AU - Nino S AU - Volkow P AU - Sereni D AU - Yeni P AU - Staszewski S AU - Gatell J AU - Wang L AU - McMillan N AU - Rousseau F AU - Miralles GD AD - Clin Barcelona, Barcelona, SpainUniv Frankfurt, D-6000 Frankfurt, GermanyHosp Bichat Claude Bernard, Paris, FranceHosp St Louis, Paris, FranceInst Natl Cancerol, Mexico City, DF, MexicoInst Natl Nutr, Mexico City, DF, MexicoTriangle Pharmaceut Inc, Durham, NC, USA TI - Preliminary profile of the antiviral activity, metabolic effects and safety of DMP-450, a novel cyclic urea protease inhibitor MH - France MH - Germany MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000088950900390 SO - Clinical Infectious Diseases 2000 ;31(1):271-271 1874 UI - 15464 AU - Sifuentes C AU - Barmenkov YO AU - Starodumov AN AU - Filippov VN AU - Lipovskii AA AD - Ctr Invest Opt, Leon 37150, Gto, MexicoSt Petersburg State Tech Univ, St Petersburg 195251, RussiaSifuentes, C, Ctr Invest Opt, Loma Bosque 115, Leon 37150, Gto, Mexico TI - Application of CdSe-nanocrystallite-doped glass for temperature measurements in fiber sensors AB - A temperature fiber sensor based on CdSe-nanocrystallite-doped phosphate glass as a sensing element is reported. This glass is shown to exhibit a reversible temperature-induced absorption edge shift at temperatures less than the annealing temperature of the glass (<370 degrees C). A dual-wavelength detection scheme based on a reflective grating and bi-cell photodiode is employed to eliminate the effects of variable signal losses in the intensity-dependent sensor. A sensor prototype, tested in the temperature range of -20 to +120 degrees C, is shown to exhibit a linear response to temperature variations, (C) 2000 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)02308-4] MH - Mexico|Guanajuato MH - Russia PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000088734700025 L2 - temperature fiber sensor;semiconductor nanocrystallite-doped phosphate glass;OPTICAL-FIBER; QUANTUM DOTS; POINT SENSOR; STRAIN; ASSIGNMENT SO - Optical Engineering 2000 ;39(8):2182-2186 1875 UI - 15498 AU - Silaghi-Dumitrescu I AU - Silberg IA AU - Filip S AU - Vlassa M AU - Silaghi-Dumitrescu L AU - Hernandez-Ortega S AD - Univ Babes Bolyai, Dept Chem, RO-3400 Cluj Napoca, RomaniaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoSilaghi-Dumitrescu, I, Univ Babes Bolyai, Dept Chem, Arany Ianos Str 11, RO-3400 Cluj Napoca, Romania TI - The crystal and molecular structure of the 2,4,6,8 tetra-t-Bu-phenothiazine 0.5 benzene adduct AB - The crystal structure of 2,4,6,8-tetra-t-Bu-phenothiazine 0.5C(6)H(6) (Pnma space group, a = 11.685, b = 25.593, c = 10.339) shows short intermolecular t-Bu(CH3)... Ph and CH3... CH3 contacts which allow the formation of well defined channels along the a direction. These channels host one benzene molecule for each pair of phenothiazine molecules. AM1 molecular orbital calculations suggest that there is a strong coupling of the t-Bu groups rotations and the folding of the ring and this in turn makes the phenothiazine skeleton to be less folded than expected from the presence of four electron donating substituents. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Romania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000088682600029 L2 - phenothiazine;tetra-t-Bu-phenothiazine;molecular structure;crystal structure;AM1 molecular orbital calculations;conformations;supramolecular associations SO - Journal of Molecular Structure 2000 ;526():279-286 1876 UI - 14529 AU - Silant'ev NA AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Main Astron Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Magnetic dynamo due to turbulent helicity fluctuations AB - Using the large-scale or long-time averaged magnetic field diffusion equation, we show that the inhomogeneous distribution of the turbulent helicity fluctuations (more correctly, the fluctuations of the alpha -coefficient) gives rise to the large-scale enhancement of the mean magnetic field. This effect occurs even if the mean helicity is absent. This newly reported dynamo mechanism requires the differential rotation of an atmosphere and does not depend on the action of the Coriolis force. The estimations show that the alpha -coefficients due to helicity fluctuations have the same (or greater) magnitude compared to the usual alpha -coefficients, related to the action of the Coriolis force. However, this mechanism works in the regions of the convective zone where the inhomogeneity of the fluctuation distribution is most prominent. It is very anisotropic in character and is described by the alpha (ij)-tensor. The possible effect of this mechanism in the Sun is discussed MH - Mexico|Puebla MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000166412300040 L2 - magnetic fields;turbulence;Sun : magnetic fields;stars : magnetic fields;FIELDS; TRANSPORT; DIFFUSION SO - Astronomy & Astrophysics 2000 ;364(1):339-347 1877 UI - 15359 AU - Silant'ev NA AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Pulkovo Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico TI - Some estimates for magnetic fluctuations in a turbulent medium AB - A new integral relationship between the fluctuations b(r, t) of a magnetic field and its mean B-0(r, t) is derived for the steady-state magnetic field in a turbulent medium. This formula provides the estimate [b . curl b] = -B-0 . curl B-0. Simultaneously, the coefficient of amplification of the mean magnetic field (alpha effect) is obtained: alpha = (eta + beta)B-0 . curl B-0 /B-0(2). The formula for alpha allows for a decrease in this coefficient owing to the back action of the magnetic field on the turbulent velocity field. It is shown that the Zel'dovich's estimate [b(2)] similar or equal to beta/eta B-0(2) for two-dimensional turbulence holds for magnetic fields at the instant the fluctuations [a(2)] of the vector potential, rather than [b(2)], reach a maximum. Here, eta and beta are the ohmic (molecular) and turbulent diffusion coefficients, respectively. This estimate is refined with allowance made for the fact that the condition for diffusion approximation itself relates the beta, b, and B-0 quantities to each other. (C) 2000 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0021-3640 UR - ISI:000089052100004 SO - Jetp Letters 2000 ;72(2):42-45 1878 UI - 15793 AU - Silant'ev NA AU - Gnedin YN AU - Krymski TS AD - Inst Nacl AStrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Main Astron Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl AStrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Faraday rotation and polarization of light scattered in magnetized stellar wind AB - We consider the single scattering of nonpolarized radiation of central star on the electrons of plasma outflow (stellar wind). We assume that such stellar wind is magnetized. It is shown that the scattered radiation acquires the integral linear polarization due to nonhomogeneous distribution of the Faraday rotation angles even for spherical stellar winds. For nonspherical winds, Faraday's rotation changes the spectrum of integral polarization drastically compared with the nonmagnetized case. The numerical calculations of the polarization spectra are presented for Parker's spherical model of magnetized stellar wind. Such spectra allow us to estimate the values of magnetic field and electron number density in stellar winds MH - Mexico|Puebla MH - Russia PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000087851000049 L2 - polarization;scattering;stars : mass-loss;stars : magnetic fields;LINEAR-POLARIZATION; DRIVEN WINDS; HOT STARS; AP STARS; SPECTROPOLARIMETRY; INSTABILITIES; POLARIMETRY; RADIATION; FIELDS SO - Astronomy and Astrophysics 2000 ;357(3):1151-1156 1879 UI - 15021 AU - Siller-Lopez F AU - Garcia-Banuelos J AU - Hasty KA AU - Segura J AU - Ramos-Marquez M AU - Qoronfleh MW AU - guilar-Cordova E AU - rmendariz-Borunda J AD - UG, CUCS, Inst Biol Mol Med, Guadalajara, Jalisco, MexicoUniv Tennessee, Dept Neurobiol & Anat, Memphis, TN, USAAntex Biol, Gaithersburg, MD, USABaylor Coll Med, Texas Childrens Hosp, Dept Pediat, Houston, TX 77030, USAArmendariz-Borunda, J, UG, CUCS, Inst Biol Mol Med, Apdo Postal 2-123, Guadalajara, Jalisco, Mexico TI - Truncated active matrix metalloproteinase-8 gene expression in HepG2 cells is active against native type I collagen AB - Background/Aims: Excess type I collagen accumulation is a major feature of fibrotic diseases such as liver cirrhosis, Reversion of this disease has not been fully accomplished, Physiologically, collagen is degraded by interstitial collagenases, neutrophil collagenase (MMP-8) being the most active against type I collagen, Introduction of MMP-8 gene into liver cells could be an advantageous tool to potentiate fibrosis degradation. Methods: We cloned latent and active MMP-8 genes in prokaryotic and eukaryotic expression vectors and an adenoviral vector, Transfection of MMP-8 in HepG2 was effectuated by CaPO4, polylysine-lactose (P-L) and adenoviral transduction, and cells and culture supernatant were harvested 72 h after transfection for analysis of MMP-8 expression by reverse transcription-polymerase chain reaction and collagenolytic activity. Results and Conclusions: We show that a truncated neutrophil collagenase (tMMP-8) lacking a portion of the carboxy terminus and with an intact amino-terminus (latent; l-tMMP-8) or a truncated amino terminus (active; a-tMMP-8) has enzymatic activity against native type I collagen, and the activity was inhibited by EDTA, 1,10-phenanthroline and TIMP-1, Both MMP-8 mRNA (latent and active) were detected by polymerase chain reaction in cells transfected with CaPO4, P-L and adenoviral transduction; however, relative expression of MMP-8 was enhanced when the plasmid was delivered as a P-L complex and increased by adenoviral infection, Finally, a-tMMP-8 cDNA was cloned in a vector under transcriptional control of a regulated promoter (PEPCK-a-tMMP-8), HepG2 cells transfect ed with the PEPCK-a-tMMP-8 plasmid DNA up-regulated expression of a-tMMP-8 after incubation of the cells with butyryl-cAMP and glucagon, while stimulation with insulin slightly down-regulated its expression, Recombinant MMP-8 expressed by HepG2-transduced cells can efficiently degrade soluble type I collagen, which is potentially useful for gene transfer therapies MH - Mexico|Jalisco MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0168-8278 UR - ISI:000090112100011 L2 - active MMP-8;collagen;collagenase;gene transfer;HUMAN NEUTROPHIL COLLAGENASE; SUBSTRATE-SPECIFICITY; HEPATIC FIBROGENESIS; LIVER FIBROSIS; TRANSCRIPTION; PERSPECTIVES; THERAPY; DNA SO - Journal of Hepatology 2000 ;33(5):758-763 1880 UI - 16202 AU - Silva-Pereyra J AU - Aubert E AU - Bosch J AU - Fernandez-Bouzas A AU - Harmony T AU - Fernandez T AU - Valdes P AU - Salazar A AU - Rivera-Gaxiola M AD - UNAM, Ctr Neurobiol, Juriquilla, MexicoCtr Neurociencias, La Habana, CubaUNAM, Neurociencias ENEP, Iztacala, Mexico TI - Source localization of strategies: N400 during lexical decision tasks MH - Cuba MH - Mexico|Estado De Mexico MH - Mexico|Queretaro PB - CAMBRIDGE: M I T PRESS RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences;Psychology, Experimental U5 - J;Meeting Abstract AV - English IS - 0898-929X UR - ISI:000085813800519 SO - Journal of Cognitive Neuroscience 2000 ;():113-113 1881 UI - 16632 AU - Silverberg N AU - Sundby B AU - Mucci A AU - Zhong SJ AU - Arakaki T AU - Hall P AU - Landen A AU - Tengberg A AD - Ctr Interdisciplinario Ciancias Marinas, La Paz 23096, Baja Calif Sur, MexicoUniv Quebec, INRS Oceanol, Rimouski, PQ G5L 3A1, CanadaMcGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 2K6, CanadaUniv Laval, Dept Geol & Genie Geol, St Foy, PQ G1K 7P4, CanadaUniv Ryukyus, Dept Chem Biol & Marine Sci, Nishihara, Okinawa 90301, JapanGothenburg Univ, Dept Analyt & Marine Chem, S-41296 Gothenburg, SwedenSilverberg, N, Ctr Interdisciplinario Ciancias Marinas, Avenida Politecn Nacl S-N, La Paz 23096, Baja Calif Sur, Mexico TI - Remineralization of organic carbon in eastern Canadian continental margin sediments AB - Undisturbed sediment samples were collected for chemical analyses at six sites during winter and summer cruises to the eastern Canadian continental margin. Micro-electrode oxygen profiles were obtained in freshly collected multicorer samples, and replicate cores were incubated at in situ temperature for 48 h to monitor changes in the concentrations of dissolved oxygen and nitrate. In addition, box cores were subsampled vertically for porewater chemistry, porosity, and particulate carbon. The data obtained are combined with estimates of sedimentation rate based on sediment trap measurements, Pb-210 dating and historical data to evaluate the role of benthic processes in the carbon cycle on the eastern Canadian continental margin. With one exception, oxygen uptake rates determined from incubations and calculated from micro-profiles were very similar, indicating that exchange of oxygen across the sediment-water interface was dominated by molecular diffusion. On the basis of this observation, transport by diffusion is assumed for the calculation of the flux rates for other solutes from their respective porewater gradients. The fluxes of oxygen into the sediments were low, but generally comparable to other continental margins at comparable depths. They varied from 1.4 to 1.8 mmol/m(2)/d in December 1993 and from 2.8 to 4.5 mmol/m(2)/d in June 1994. Uptake of nitrate by the sediment occurred at all sites except for the continental slope off Nova Scotia. Both oxygen and nitrate uptake were higher in summer than in winter, indicative of a lingering response to the input of organic matter associated with the early spring bloom. At one of the sampling sites, Miscou Channel, the measured oxygen uptake rate far exceeded the flux calculated from the oxygen gradient. The difference suggests biologically enhanced exchange with the overlying waters at this site, consistent with the greater abundance of benthic organisms. The rate of organic carbon mineralization at the seafloor(1.6 - 4.2 mmol/m(2)/d) was estimated as the sum of the sediment oxygen and nitrate uptake rates. The contribution of other electron-accepters to the mineralization of organic carbon is assumed to be accounted for by the oxidation of most of their reduced by-products by O-2 and NO3-. The return fluxes of dissolved inorganic carbon (Sigma CO2 efflux corrected for carbonate dissolution) were generally comparable to the carbon oxidation rates. A detailed carbon budget was established at one of the sampled stations for which a complete set of measurements is available. The vertical flux of total particulate carbon through the water column (measured with a sediment trap at 150 m depth) accounts for approximately 9 % of the annual primary production (PP). In the sediment, about 6% of the PP is remineralized and total carbon equivalent to 4.5% PP is buried. The self-consistency of the flux data at this station is used to justify similar budget calculations at the other stations where a limited data set was gathered. Sequestration of organic carbon via burial with the accumulating sediments ton average 0.5 mol/m(2)/yr) is partially offset by the release of CO2 associated with carbonate precipitation and burial (about 0.2 mol/m(2)/yr). (C) 1999 Elsevier Science Ltd. All rights reserved MH - Canada MH - Japan MH - Mexico|Baja California Sur MH - Sweden PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 22 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000084933000013 L2 - COASTAL MARINE-SEDIMENTS; FLOW-INJECTION ANALYSIS; EARLY DIAGENESIS; SULFATE REDUCTION; LAURENTIAN TROUGH; BENTHIC FLUXES; SCOTIAN SHELF; OXYGEN-DEMAND; SEA-FLOOR; DEEP-SEA SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2000 ;47(3-4):699-731 1882 UI - 14723 AU - Simon R AU - Wolf KB AD - Ctr Int Ciencias, Cuernavaca 62210, Morelos, MexicoInst Math Sci, Madras 600113, Tamil Nadu, IndiaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoSimon, R, Ctr Int Ciencias, Ave Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Fractional Fourier transforms in two dimensions AB - We, analyze the fractionalization of the Fourier transform (FT), starting from the minimal premise that repeated application of the fractional Fourier transform (FrFT) a sufficient number of times should give back the There is a qualitative increase in the richness of the solution manifold, from U(1) (the circle S') in the one-dimensional case to U(2) (the four-parameter group of 2 x 2 unitary matrices) in the two-dimensional case [rather than simply U(1) x U(1)]. Our treatment clarifies the situation in the N-dimensional case. The parameterization of this manifold (a fiber bundle) is accomplished through two powers running over the torus T-2 = S-1 x S-1 and two parameters running over the Fourier sphere S-2. We detail the spectral representation of the FrFT: The eigenvalues are shown to depend only on the T-2 coordinates; the eigenfunctions, only on the S2 coordinates. FrFTs corresponding to special points on the Fourier sphere have for eigenfunctions the Hermite-Gaussian beams and the Laguerre-Gaussian beams, while those corresponding to generic points are SU(2)-coherent states of these beams. Thus the integral transform produced by every Sp(4, R) first-order system is essentially a FrFT. (C) 2000 Optical Society of America [S0740-3232(00)00512-3] OCIS codes: 070.2590, 080.2730 MH - India MH - Mexico|Morelos PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000165752300028 L2 - SCHELL-MODEL BEAMS; OPTICAL-SYSTEMS; CANONICAL TRANSFORMATIONS; POLARIZATION OPTICS; QUANTUM-MECHANICS; REPRESENTATION; ORDER; IMPLEMENTATION; REALIZATION; OSCILLATOR SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(12):2368-2381 1883 UI - 16590 AU - Simon R AU - Wolf KB AD - Inst Math Sci, Madras 600113, Tamil Nadu, IndiaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoSimon, R, Inst Math Sci, CIT Campus, Madras 600113, Tamil Nadu, India TI - Structure of the set of paraxial optical systems AB - The set of paraxial optical systems is the manifold of the group of symplectic matrices. The structure of this group is nontrivial: It is not simply connected and is not of an exponential type. Our analysis clarifies the origin of the metaplectic phase and the inherent limitations for optical map fractionalization. We describe, for the first time to our knowledge, an image girator and a cross girator whose geometric and wave implementations are of interest. (C) 2000 Optical Society of America [S0740-3232(00)00102-2] OCIS codes: 080.2730, 000.3870 MH - India MH - Mexico|Morelos PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 26 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000085065700017 L2 - FRACTIONAL FOURIER-TRANSFORMS; SCHELL-MODEL BEAMS; WIGNER DISTRIBUTION FUNCTION; PARTIALLY COHERENT BEAMS; CANONICAL TRANSFORMATIONS; IWASAWA DECOMPOSITION; POLARIZATION OPTICS; SQUEEZED STATES; HAMILTON THEORY; QUANTUM SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2000 ;17(2):342-355 1884 UI - 16188 AU - Simon U AU - Gasparian V AD - Univ Essen Gesamthsch, Dept Inorgan Chem, D-45127 Essen, GermanyUniv Guanajuato, Fac Chem, Guanajuato 36000, MexicoSimon, U, Univ Essen Gesamthsch, Dept Inorgan Chem, Schutzenbahn 70, D-45127 Essen, Germany TI - 1D conductance in cetineites: A new class of chemically synthesized nanoporous semiconductors AB - Cetineites are crystalline nanoporous oxochalcogenoantimonates with photosemiconducting host lattice. The conduction band, which predominantly carries the photoconduction; results from the interaction of chemically different subunits in an alternating sequence along the crystallographic c-axis. We show that it is possible to obtain an exact analytical expression for the conductance for such a one-dimensional periodic system with a complex unit cell, were we consider the case of small extent of each individual potential as compared to any other typical lengths of the system. By means of this basic consideration we can qualitatively describe the characteristics of the experimentally observed wavelength dependent photoconductivity, obtained from single crystals of this new material MH - Germany MH - Mexico|Guanajuato PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000086431000030 SO - Physica Status Solidi B-Basic Research 2000 ;218(1):151-154 1885 UI - 15877 AU - Singh AK AU - Amburosea CV AU - Jha NK AU - Sharma P AU - Cabrera A AU - Perz G AD - Indian Inst Technol, Dept Chem, New Delhi 110016, IndiaUniv Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoSingh, AK, Indian Inst Technol, Dept Chem, New Delhi 110016, India TI - [Tetra(n-butyl)ammonium] [di(mu-bromo) bis(dichloro(p-tolyl)antimonate(III)}]: synthesis and crystal structure AB - The crystal structure of a salt of mixed trihalo(aryl)antimonate(III) anion, [n-Bu4N](2)[(p-tol)Cl2Sb(mu-Br)(2)SbCl2(p-tol)] (p-tol = p-tolyl) reveals that the anion is dimeric in nature and two Sb atoms of the dimer are asymmetrically bridged by bromide ions (Sb-Br(bridging)= 2.985(2)/3.373(1) Angstrom) MH - India MH - Mexico|Distrito Federal PB - NORTHWOOD: SCIENCE REVIEWS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0308-2342 UR - ISI:000087590900020 L2 - DICHLORIDE; DIBROMIDE SO - Journal of Chemical Research-S 2000 ;(4):198-199 1886 UI - 15128 AU - Singh RP AU - Nelson JC AU - Sorrells ME AD - CIMMYT, Wheat Program, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoCornell Univ, Dept Plant Breeding & Biometry, Ithaca, NY 14853, USANelson, JC, 49 Lionel Rd, Darlington, WA 6070, Australia TI - Mapping Yr28 and other genes for resistance to stripe rust in wheat AB - Stripe (yellow) rust, caused by Puccinia striiformis West., is an important constraint to wheat production in cool environments. With the purpose of identifying genes for resistance to the disease, a RFLP mapping population of recombinant inbred lines developed from a synthetic [Triticum turgidum L. x Aegilops tauschii (Coss.) Schmal.] x T. aestivum L. cv. 'Opata 85' cross was visually evaluated for seedling infection type in three greenhouse inoculation tests and for adult-plant disease severity in Pour field tests at Celaya and Toluca, Mexico. A previously unidentified gene from Ae. tauschii, designated as Yr28, was located on chromosome arm 4DS. Although Yr28 strongly influenced seedling resistance, it showed a strong effect in adult plants at only the warmer of the two field sites. A second gene showed high environmental sensitivity in seedling tests, with resistance associated with Opata marker alleles near the adult-plant resistance (APR) gene Yr18 on chromosome arm 7DS. Gene Yr18, known to be present in Opata, strongly reduced disease response in field trials and was tightly linked with leaf-rust resistance gene Lr34. Three other regions from Opata on chromosome arms 3BS, 3DS, and 5DS were also associated with APR MH - Australia MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 35 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000089410600033 L2 - ADULT-PLANT RESISTANCE; LEAF RUST; BREAD WHEAT; PUCCINIA-RECONDITA; TRITICUM-AESTIVUM; COMMON WHEAT; YELLOW RUST; LR34; ASSOCIATION; LINKAGE SO - Crop Science 2000 ;40(4):1148-1155 1887 UI - 15675 AU - Singh SK AU - Ordaz M AU - Pacheco JF AU - Courboulex F AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 041510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 041510, DF, MexicoGeosci Azur, UMR, F-06560 Valbonne, FranceSingh, SK, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 041510, DF, Mexico TI - A simple source inversion scheme for displacement seismograms recorded at short distances AB - We have implemented and tested a simple inversion scheme to retrieve source parameters of small and moderate earthquakes recorded at close distances. The inversion assumes that such events may be approximated by a point-source shear dislocation, and the medium may be considered an infinite space. Theoretical seismograms used in the inversion include near- and intermediate-field contributions. The effect of free surface is approximately taken into account by multiplying the infinite-space synthetics by two. The location of the event is assumed to be known. Based on an examination of the data, the user chooses the length of the record and the weight of each trace to be used in the inversion. The shape of the source-time function is estimated from the observed seismograms. A grid search is performed to determine the focal mechanism and the seismic moment which minimizes the error between the observed and the synthetic seismograms. For two or more recordings, the inversion gives a solution which is consistent with the first-motion data and/or the moment tensor inversion of regional seismic waves. If only a single three-component recording is available then the inversion yields more than one equally acceptable focal mechanisms. In such cases, the first-motion polarities or a prior knowledge of the tectonics of the region is essential to constrain the solution. The test of the method on near-source broadband recordings of small and moderate earthquakes in Mexico and the aftershock sequence of 1997 Umbria-Marche, Italy shows that it gives fast, and surprisingly robust and reliable estimation of source parameters MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1383-4649 UR - ISI:000088036500005 L2 - infinite-space synthetics;inversion of near-source data;near-field seismograms;3 DECEMBER 1988; EARTHQUAKE SEQUENCE; NEAR-FIELD; PASADENA EARTHQUAKE; MOTION SO - Journal of Seismology 2000 ;4(3):267-284 1888 UI - 14230 AU - Sira-Ramirez H AU - Llanes-Santiago O AD - IPN, CINVESTAV, Dept Ingn Elect, Mexico City 7300, DF, MexicoInst Super Politecn JA Echeverria, Dept Ingn Elect, La Habana, CubaSira-Ramirez, H, IPN, CINVESTAV, Dept Ingn Elect, Av IPN 2508,Col San Pedro Zacatenco,AP 14740, Mexico City 7300, DF, Mexico TI - Sliding mode control of nonlinear mechanical vibrations AB - In this article we illustrate how the property of differential flatness can be advantageously joined to the sliding mode controller design methodology for the active stabilization of nonlinear mechanical vibration systems. The proposed scheme suitably combines off-line trajectory planning and an on-line "smoothed" sliding mode feedback trajectory tracking scheme for regulating the evolution of the flat output variables toward the desired equilibria. [S0022-0434(00)00404-4] MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Instruments & Instrumentation U5 - J;Article AV - English IS - 0022-0434 UR - ISI:000167109200015 L2 - FLATNESS; SYSTEMS SO - Journal of Dynamic Systems Measurement and Control-Transactions of the Asme 2000 ;122(4):674-678 1889 UI - 16276 AU - Sira-Ramirez H AU - Castro-Linares R AU - Liceaga-Castro E AD - IPN, CINVESTAV, Dept Ingn Elect, Mexico City 07300, DF, MexicoGlasgow Caledonian Univ, Dept Math, Glasgow G4 0BA, Lanark, ScotlandSira-Ramirez, H, IPN, CINVESTAV, Dept Ingn Elect, Apartado Postal 14-740, Mexico City 07300, DF, Mexico TI - A Liouvillian systems approach for the trajectory planning-based control of helicopter models AB - A feedback regulation scheme, based on off-line trajectory planning and an approximate state linearization, is proposed for the hover-to-hover stabilization of simplified, underactuated, models of a helicopter system. The approach, based on the 'Liouvillian' character of the helicopter kinematic equations, advantageously uses the total, or partial, differential flatness property of the system models. The controller performance is evaluated through digital computer simulations which include initial state setting errors of significant magnitudes. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Mexico|Distrito Federal MH - United Kingdom PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 8 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000086231000008 L2 - underactuated systems;helicopter regulation;Liouvillian systems;trajectory planning;NONLINEAR-SYSTEMS SO - International Journal of Robust and Nonlinear Control 2000 ;10(4):301-320 1890 UI - 15740 AU - Sivinski J AU - Pinero J AU - Aluja M AD - USDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USAInst Ecol, Xalapa 91000, Veracruz, MexicoSivinski, J, USDA ARS, Ctr Med Agr & Vet Entomol, POB 14565, Gainesville, FL 32604 USA TI - The distributions of parasitoids (Hymenoptera) of Anastrepha fruit flies (Diptera : Tephritidae) along an altitudinal gradient in Veracruz, Mexico AB - In the state of Veracruz, Mexico, fruits from 38 sites at various altitudes were collected monthly over a period of 2 gears, and the tephritid fruit flies of the genus Anastrepha and associated parasitoids that emerged from these fruits were identified and counted. Of the 26 species of fruits that contained Anastrepha larvae, 18 species also contained a total of 10 species of Anastrepha parasitoids. These consisted of 4 native and 1 exotic species of opiine braconid larval-pupal parasitoids, 2 native species of eucoilid larval-pupal parasitoids, 1 exotic species of eulophid larval-pupal parasitold, 1 exotic species of pteromalid pupal parasitoid, and I native species of diapriid pupal parasitoid, Overall parasitism (including flies from fruit species that bore no parasitoids) was 6% and was greatest, 16%, at 600-800 m in altitude. The relative contributions of individual parasitoid species to overall parasitism were frequently influenced by both the altitude land correlated changes in temperature and precipitation) and the species of plant in which the Anastrepha larvae were found. This was particularly the case among the more abundant and widespread Braconidae. To distinguish the role of altitude from that of the distributions of the host plants, these braconids were examined in 4 individual species of fruit that grew over a broad range of altitudes. In guava (Psidium guajava L.) and "jobo" (Spondias mombin L,) the parasitoid Doryctobracon areolatus (Szepligeti) was relatively more common at low altitudes. Its congener, Doryctobracon crawfordi (Viereck), was relatively more abundant at high altitudes in sour orange (Citrus aurantium L.. Utetes anastrephae (Viereck) became relatively more common at higher altitudes in S. mombin, whereas Diachasmimorpha longicaudata (Ashmead) tended to become relatively rare at the highest altitudes in C. aurantium, but increased at high altitudes in P. guajava compared to other braconids. Different altitudinal patterns of abundance in different fruits suggests the importance of both biotic and abiotic factors in parasitoid distributions. We discuss the effect of an expanding agricultural frontier on parasitoid abundance and relate our findings to the design of a fruit fly biological control program that tailors mass releases to parasitoid climate preferences MH - USA MH - Mexico|Veracruz PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 23 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000088016300011 L2 - biogeography;biological control;Braconidae;Diapriidae;Eucoilidae;Eulophidae;Pteromalidae;FLY DIPTERA; PUPAL PARASITOIDS; LARVAL-PUPAL; SUPPRESSION; POPULATION; BRACONIDAE SO - Biological Control 2000 ;18(3):258-269 1891 UI - 13894 AU - Skiba YN AU - Strelkov AY AD - Univ Nacl Autonoma Mexico, Grp Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoRussian Acad Sci, MV Keldysh Appl Math Inst, Moscow 125047, RussiaSkiba, YN, Univ Nacl Autonoma Mexico, Grp Ctr Ciencias Atmosfera, Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - On the normal mode instability of modons and Wu-Verkley waves AB - The normal mode instability of steady Wu-Verkley (1993) wave and modons by Verkley (1984, 1987, 1990) and Neven (1992) is considered. All these flows are solutions to the vorticity equation governing the motion of an ideal incompressible fluid on a rotating sphere. A conservation law for infinitesimal perturbations to each solution is derived and used to obtain a necessary condition for its exponential instability. By these conditions, Fjortoft's (1953) average spectral number of the amplitude of an unstable mode must be equal to a specific number that depends on the degree of the solution in its inner and outer regions as well as on spectral distribution of the mode energy in these regions. Some properties of the conditions for different types of modons are discussed. The maximum growth (and decay) rate of the modes is estimated, and the orthogonality of the amplitude of each unstable, decaying, or non-stationary mode to the basic solution is shown in the energy inner product. The new instability conditions confine the unstable disturbances of the WV wave and modon to a hypersurface in the perturbation space and allow interpretation of their energy structure. They are also useful both in estimating the maximum growth rate of unstable modes and in testing the numerical algorithms designed for the linear stability study MH - Mexico|Distrito Federal MH - Russia PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Geochemistry & Geophysics;Mechanics U5 - J;Article AV - English IS - 0309-1929 UR - ISI:000168133200002 L2 - barotropic waves;modons;conservation laws;BAROTROPIC VORTICITY EQUATION; SPHERE; STABILITY; FLOWS; ATMOSPHERE SO - Geophysical and Astrophysical Fluid Dynamics 2000 ;93(1-2):39-54 1892 UI - 14448 AU - Slater H AU - varez-Morales A AU - Barber CE AU - Daniels MJ AU - Dow JM AD - John Innes Ctr Plant Sci Res, Sainsbury Lab, Norwich NR4 7UH, Norfolk, EnglandUniv Irapuato, Dept Plant Genet Engn, IPN, CINVESTAV, Irapuato 36500, GTO, MexicoDow, JM, John Innes Ctr Plant Sci Res, Sainsbury Lab, Norwich Res Pk, Norwich NR4 7UH, Norfolk, England TI - A two-component system involving an HD-GYP domain protein links cell-cell signalling to pathogenicity gene expression in Xanthomonas campestris AB - The synthesis of extracellular enzymes and extracellular polysaccharide (EPS) in Xanthomonas campestris pv. campestris (Xcc) is regulated by a cluster of genes called rpf (for regulation of pathogenicity factors). Two of the genes, rpfF and rpfB, have previously been implicated in the synthesis of a diffusible regulatory molecule, DSF. Here, we describe a screen of transposon insertion mutants of Xcc that identified two DSF-overproducing strains. In each mutant, the gene disrupted is rpfC, which encodes a hybrid two-component regulatory protein in which the sensor and regulator domains are fused and which contains an additional C-terminal phosphorelay (HPt) domain. We show that rpfC is in an operon with rpfH and rpfG. The predicted protein RpfG has a regulatory input domain attached to a specialized version of an HD domain, previously suggested to function in signal transduction. The predicted protein RpfH is structurally related to the sensory input domain of RpfC. We show that RpfC and RpfG act positively to regulate the synthesis of extracellular enzymes and EPS, but that RpfC acts negatively to regulate the synthesis of DSF. We propose that RpfGHC is a signal transduction system that couples the synthesis of pathogenicity factors to sensing of environmental signals that may include DSF itself MH - United Kingdom MH - Mexico|Guanajuato PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 63 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000166576500006 L2 - GRAM-NEGATIVE BACTERIA; LUXR-LUXI FAMILY; PV CAMPESTRIS; VIBRIO-HARVEYI; BORDETELLA-PERTUSSIS; EXTRACELLULAR POLYSACCHARIDE; TRANSCRIPTIONAL REGULATORS; 2-COMPONENT PHOSPHORELAY; INSERTION MUTAGENESIS; PATHOVAR CAMPESTRIS SO - Molecular Microbiology 2000 ;38(5):986-1003 1893 UI - 15773 AU - Sloan NL AU - Pinto E AU - Calle A AU - Langer A AU - Winikoff B AU - Fassihian G AD - Populat Council, New York, NY 10021, USACEMOPLAF, Quito, EcuadorMaternidad Isidro Ayora, Quito, EcuadorUniv Cent Quito, Quito, EcuadorPopulat Council, Mexico City, DF, MexicoSloan, NL, 1 Dag Hammarskjold Plaza, New York, NY 10017, USA TI - Reduction of the cesarean delivery rate in Ecuador AB - Objective: This quasi-experimental study tested a method to safely reduce the rate of cesarean delivery in Ecuador. Method: Hospital policy was modified to provide co-management for cesarean candidates at the major maternity hospital in Quite. Cesarean rates before (n = 14743) and after (n = 12351) the intervention were compared by chi-square and multiple logistic regression with other major maternity hospitals (before, n = 12514; after, n = 9590). Characteristics of cesarean candidates who had vaginal or cesarian deliveries in the intervention hospital were compared by chi-square (n = 1584). Result: Cesarean rates declined by 4.5% (P < 0.001) in the intervention hospital. A smaller (2.1%, P < 0.01) reduction occurred in the other major public hospital in Quite where students of the co-principal investigator attempted to reduce cesarean delivery. Cesarean rates were unchanged in the public maternity hospitals of other major cities. Conclusion: Case co-management, a simple, locally appropriate, and inexpensive intervention, safely reduced surgical delivery, hospital stay and cost of care. (C) 2000 International Federation of Gynecology and Obstetrics MH - Ecuador MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 5 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0020-7292 UR - ISI:000087825400004 L2 - cesarean section;SECTION; BIRTH; PROGRAM SO - International Journal of Gynecology & Obstetrics 2000 ;69(3):229-236 1894 UI - 16398 AU - Slotwinski JA AU - Sydnor CR AU - Lopez-Sanchez AL AD - NIST, Mfg Engn Lab, Gaithersburg, MD 20899, USAAcoust Vibrat Grp, Queretaro, MexicoSlotwinski, JA, NIST, Mfg Engn Lab, Gaithersburg, MD 20899, USA TI - Variable waveform excitation of ceramic element transducers for ASTM E127 type reference block calibrations AB - Nominally identical ceramic element ultrasonic transducers have been used successfully to calibrate ASTM E127 type flat bottom hole (FBH) aluminum reference blocks. The transducers all had nominal center frequencies of 5 MHz, and nominal element diameters of 9.5 mm (0.38 in.) or 10.7 mm (0.42 in.). The inherent performance variability among these transducers runs eliminated by monitoring and matching the frequency content of the generated ultrasonic pressure pulses. The pulses were monitored with a polymer polyvinylidene (PVDF) membrane hydrophone and the frequency content was matched by adjusting the shape oft he excitation waveform. Several different common excitation shapes were examined in detail. Results indicate that this type of tuning procedure will result in similar performance among nominally identical ceramic element transducers. This may ultimately allow for the routine reliable calibration of long metal path blocks that cannot be calibrated using quartz element ultrasonic transducers as currently stipulated in E127 MH - Mexico|Queretaro MH - USA PB - COLUMBUS: AMER SOC NON-DESTRUCTIVE TEST RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0025-5327 UR - ISI:000085719000013 L2 - ASTM 227;ceramic transducers;FBH;membrane hydrophone;PVDF;reference blocks;ultrasound SO - Materials Evaluation 2000 ;58(3):455-461 1895 UI - 15794 AU - Smale M AU - Wood S AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City, DF, MexicoInt Food Policy Res Inst, Washington, DC 20036, USASmale, M, CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City, DF, Mexico TI - Maize technology development and transfer: A GIS application for research planning in Kenya MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Economics & Policy;Economics U5 - J;Book Review NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000087788800009 SO - Agricultural Economics 2000 ;23(1):89-91 1896 UI - 13468 AU - Smeyers YG AU - Villa M AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoSmeyers, YG, CSIC, Inst Estructura Mat, Serrano 123, E-28006 Madrid, Spain TI - A study of the internal dynamics of trimethylamine by means of the non-rigid group theory AB - The non-rigid molecule group theory (NRG) in which the dynamical symmetry operations are defined as physical operations is applied to determine the character table for the triple equivalent methyl rotation and pyramidal inversion in trimethylamine. The restricted NRG of this molecule is seen to be a group of order 648, formed as a product of two subgroups: the G(324) subgroup corresponding to planar trimethylamine and the pyramidal inversion. For this purpose the structure of the r-NRG of planar trimethylamine is first deduced, i.e., the number of classes, irreducible representations, as well as their dimensions. Finally, guidelines are given to deduce systematically the symmetry eigenvectors developed on the basis of quadruple products of trigronometric functions. The r-NRG molecule group theory is seen to be used advantageously to study the internal dynamics of such small organic molecules MH - Mexico|Distrito Federal MH - Spain PB - BUSSUM: BALTZER SCI PUBL BV RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0259-9791 UR - ISI:000169361900004 L2 - large amplitude motions in trimethylamine;classes and character table for torsion-inversion in trimethylamine;NONRIGID MOLECULES; SPECTRUM; METHYLAMINE; ACETONE SO - Journal of Mathematical Chemistry 2000 ;28(4):377-388 1897 UI - 15737 AU - Smeyers YG AU - Villa M AD - CSIC, Inst Estructura Mat, Madrid 28006, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoSmeyers, YG, CSIC, Inst Estructura Mat, Serrano 123, Madrid 28006, Spain TI - Influence of the vibrational zero-point energy correction on the amine inversion barrier and the far-infrared spectrum of methylamine AB - The vibrational zero-point energy correction is determined for the methyl torsion and amine hydrogen wagging potential energy function. It is found that the amine inversion barrier increases from 1727.27 cm(-1) up to 1850.65 cm(-1) which is in better agreement with the value of 1937 cm(-1) deduced from experiment. In addition, the splittings calculated for the fundamental band reproduce fairly well the experimental data. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000088051600007 L2 - AB-INITIO DETERMINATION; TORSION MODES; STATE; ASSIGNMENT; GEOMETRY SO - Chemical Physics Letters 2000 ;324(4):273-278 1898 UI - 16160 AU - Smeyers YG AU - Villa M AU - Uc VH AU - Vivier-Bunge A AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoSmeyers, YG, CSIC, Inst Estructura Mat, Serrano 123, E-28006 Madrid, Spain TI - A theoretical study of the methyl and aldehyde torsion FIR spectra in symmetric propanal isotopomers AB - This paper is an extension of the techniques developed by us [A. Vivier-Bunge, V. H. Uc, and Y. G. Smeyers, J. Chem. Phys. 109, 2779 (1998)] for standard propanal. In that paper the potential energy surface for the simultaneous methyl and asymmetric aldehydic torsions was calculated at RHF/MP2 level using the 6-311(3df,p) basis set for propanal. The fit of the energy values to symmetry-adapted functional forms was carried out by using the 28 energy values which retain the C-3, dynamical symmetry of the methyl group in the optimization procedure. With this potential, as well as with the kinetic parameters and the electric dipole moment variations, the FIR frequencies and intensities for the methyl and aldehyde torsions of seven symmetric isotopomers of propanal were determined theoretically using two-dimensional calculations. The calculated spectra of propanal and three of its isotopomers were compared with the available experimental data. It is found that the calculations for the cis conformer satisfactorily reproduce the aldehyde and methyl torsion spectra and furnish also methyl torsionally excited progressions for the aldehyde torsion modes. The methyl torsion frequencies agree especially well whenever the methyl group is nondeuterated. The small deviations encountered for the deuterated compound are probably due to some mass effect, such as the zero-point vibrational energy correction, which is not taken into account in the present calculations. Finally, the influence of the deuteration on the intensities is discussed. (C) 2000 Academic Press MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical;Spectroscopy U5 - J;Article AV - English IS - 0022-2852 UR - ISI:000086471100007 L2 - nonrigid molecules;large-amplitude vibration modes;ab initio FIR spectrum determination;propanal isotopomer;FIR torsion spectra;NONRIGID MOLECULES SO - Journal of Molecular Spectroscopy 2000 ;201(1):62-69 1899 UI - 16186 AU - Smirnov YF AU - Smirnova NA AU - Van Isacker P AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGrand Accelerateur Natl Ions Lourds, F-14076 Caen 5, FranceMoscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, RussiaSmirnov, YF, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - SU(3) realization of the rigid asymmetric rotor within the interacting boson model AB - It is shown that the spectrum of the asymmetric rotor can be realized quantum mechanically in terms of a system of interacting bosons. This is achieved in the SU(3) limit of the interacting boson model by considering higher-order interactions between the bosons. The spectrum corresponds to that of a rigid asymmetric rotor in the limit of infinite boson number MH - France MH - Mexico|Distrito Federal MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000086397700002 L2 - COLLECTIVE NUCLEAR-STATES; CLASSICAL LIMIT; GAMMA-SOFTNESS; SHELL-MODEL; TRIAXIALITY; SYMMETRY; DEFORMATION; SPECTRA; PROTON SO - Physical Review C 2000 ;6104(4): 1900 UI - 15913 AU - Smith KR AU - Samet JM AU - Romieu I AU - Bruce N AD - Univ Calif Berkeley, Berkeley, CA 94720, USAJohns Hopkins Univ, Dept Epidemiol, Baltimore, MD, USAPan Amer Hlth Org, Mexico City, DF, MexicoUniv Liverpool, Liverpool L69 3BX, Merseyside, EnglandSmith, KR, Univ Calif Berkeley, Berkeley, CA 94720, USA TI - Indoor air pollution in developing countries and acute lower respiratory infections in children AB - Background-A critical review was conducted of the quantitative literature linking indoor air pollution from household use of biomass fuels with acute respiratory infections in young children, which is focused on, but not confined to, acute lower respiratory infection and pneumonia in children under two years in less developed countries. Biomass in the form of wood, crop residues, and animal dung is used in more than two fifths of the world's households as the principal fuel. Methods-Medline and other electronic databases were used, but it was also necessary to secure literature from colleagues in less developed countries where not all publications are yet internationally indexed. Results-The studies of indoor air pollution from household biomass fuels are reasonably consistent and, as a group, show a strong significant increase in risk for exposed young children compared with those living in households using cleaner fuels or being otherwise less exposed. Not all studies were able to adjust for confounders, but most of those that did so found that strong and significant risks remained. Conclusions-It seems that the relative risks are likely to be significant for the exposures considered here. Since acute lower respiratory infection is the chief cause of death in children in less developed countries, and exacts a larger burden of disease than any other disease category for the world population, even small additional risks due to such a ubiquitous exposure as air pollution have important public health implications. In the case of indoor air pollution in households using biomass fuels, the risks also seem to be fairly strong, presumably because of the high daily concentrations of pollutants found in such settings and the large amount of time young children spend with their mothers doing household cooking. Given the large vulnerable populations at risk, there is an urgent need to conduct randomised trials to increase confidence in the cause-effect relationship, to quantify the risk more precisely, to determine the degree of reduction in exposure required to significantly improve health, and to establish the effectiveness of interventions MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 102 U4 - Respiratory System U5 - J;Review AV - English IS - 0040-6376 UR - ISI:000087367100016 L2 - acute respiratory infections;indoor air pollution;biomass fuels;developing countries;children;PRIMARY-SCHOOL CHILDREN; WOOD-BURNING STOVES; YOUNG GAMBIAN CHILDREN; RISK-FACTORS; ENVIRONMENTAL-FACTORS; PRESCHOOL-CHILDREN; NITROGEN-DIOXIDE; POTENTIAL INTERVENTIONS; CHILDHOOD PNEUMONIA; GLOBAL PERSPECTIVE SO - Thorax 2000 ;55(6):518-532 1901 UI - 15103 AU - Smith RJ AU - Chayet AS AU - Mondino BJ AD - Beverly Hills Vis & Laser Inst, Beverly Hills, CA 90211, USACODET Inst Oftalmol, Tijuana, MexicoJules Stein Eye Inst, Los Angeles, CA 90024, USASmith, RJ, Beverly Hills Vis & Laser Inst, 9033 Wilshire Blvd,Ste 402, Beverly Hills, CA 90211 USA TI - Penetrating keratoplasty from a temporal approach AB - PURPOSE: To describe the technique of penetrating keratoplasty using a temporal approach. METHODS: Report of two cases of phakic penetrating keratoplasty performed with the surgeon positioned at the temporal side of the head. RESULTS: The temporal approach improved the surgical exposure,which eliminated the need for a bridal suture, facilitated the placement of the first two cardinal sutures, and facilitated subsequent placement of nasal sutures. CONCLUSION: The temporal approach to penetrating keratoplasty may facilitate suture placement, decrease surgical time, and reduce suture-induced astigmatism. (C) 2000 by Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000089759500015 SO - American Journal of Ophthalmology 2000 ;130(4):517-519 1902 UI - 15062 AU - Smith TL AU - Kardong KV AU - Lavin-Murcio PA AD - Washington State Univ, Sch Biol Sci, Pullman, WA 99164, USAInst Tecnol Ciudad Victoria, Tamaulipas 87010, MexicoKardong, KV, Washington State Univ, Sch Biol Sci, Pullman, WA 99164, USA TI - Persistence of trailing behavior: Cues involved in poststrike behavior by the rattlesnake (Crotalus viridis oreganus) AB - Following the release of envenomated prey, a rattlesnake exhibits a series of poststrike behaviors, involving largely chemosensory cues that lead to recovery and swallowing of the dead prey. Unlike prestrike chemosensory activity that may help the snake place itself generally in the vicinity of prey, this poststrike trailing is more specific and selective. The rattlesnake discriminates the particular poststrike trail of the envenomated mouse from odor trails of other unstruck mice. But an envenomated prey may dash significant distances over complicated terrain. Consequently, poststrike trailing by the rattlesnake may take hours during which it is exposed to its own predators. If the odor trail ages significantly, losing its perceptibility, then poststrike trailing eventually becomes futile. To examine this, each rattlesnake was permitted to strike prey, but allowed to follow the placed scent trails only at six fixed intervals poststrike, t = 0, 2, 4, 6, 12, and 24 hours. Our results indicate that in the absence of an envenomating strike, rattlesnakes did not exhibit successful trailing of prey odors, whether those scent trails were from an unstruck mouse or a mouse struck independently by another snake. However, allowed to strike, snakes maintained an interest in selective trailing up to 24 hours from the time of envenomation, although with decreasing frequency. Therefore, the strike must precede the specific and selective poststrike trailing behavior, characterized by an ability to discriminate and track the scent of the particular mouse envenomated. These results imply that the strike itself is a releaser of selective chemosensory trailing and that snakes can retain for extended periods of time a 'memory' of the unique chemical cues of the particular mouse struck MH - Mexico|Tamaulipas MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 4 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0005-7959 UR - ISI:000089943400002 L2 - rattlesnakes;poststrike trailing;chemosensory cues;predatory behavior;PRAIRIE RATTLESNAKES; PREDATORY BEHAVIOR; VOMERONASAL ORGAN; PREY; SNAKES; DISCRIMINATION; STRIKING; MICE SO - Behaviour 2000 ;137():691-703 1903 UI - 15743 AU - Soberon-Mobarak A AU - az-Aparicio E AU - Torres-Armenta J AU - Adams LG AU - Suarez-Guemes F AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Microbiol & Immunol, Mexico City 04510, DF, MexicoTexas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843, USACtr Nacl Invest Forestales & Agropecurias, Ctr Nacl Invest Disciplinarias Microbiol Vet, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, CEPIER, Mexico City 04510, DF, MexicoSuarez-Guemes, F, Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Microbiol & Immunol, Mexico City 04510, DF, Mexico TI - Absence of shedding of two B-abortus strains in goats after vaccination with live vaccines AB - The objective of this study was to determine if B. abortus rough mutant strains RB51 and rfbK are eliminated in goat milk, Thirty milk goats were divided into two groups. Group I was inoculated with 4 x 10(10) cfu/ml of B.abortus RB51 strain and Group II with 1 x 10(9) cfu/ml of B. abortus rfbK strain by subcutaneous route in the right axilary region. Milk samples were taken aseptically on a daily basis for the first 30 days and weekly for the second and third months. The samples were inoculated on Farrell's media and incubated under 5-10% CO2 at 37 degrees C for 10 days. The suspicious colonies were recultured in Farrell's media. There were no isolations of bacteria with characteristics of Brucella from any of the milk samples collected during 90 days of the study. It was concluded that neither of the strains used at these doses were eliminated by milk in goats inoculated during lactation. (C) 2000 Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Medicine, Research & Experimental;Veterinary Sciences U5 - J;Article AV - English IS - 0264-410X UR - ISI:000087890000014 L2 - Brucella;rough mutant strains;excretion;BRUCELLA-ABORTUS; ROUGH; INFECTION; SURVIVAL; MUTANT SO - Vaccine 2000 ;18(26):3018-3020 1904 UI - 15854 AU - Soberon J AU - Rodriguez P AU - Vazquez-Dominguez E AD - CONABIO, Mexico City 04420, DF, MexicoUniv Queensland, Dept Zool & Entomol, Brisbane, Qld 4072, AustraliaSoberon, J, CONABIO, Fernandez Leal 43,Barrio Concepc,Col Coyoacan, Mexico City 04420, DF, Mexico TI - Implications of the hierarchical structure of biodiversity for the development of ecological indicators of sustainable use AB - The increasing interest, and the actual necessity, for adequate means to evaluate how sustainable human activities are, has led to efforts to define indicators of sustainability. We propose the use of ecological indicators of sustainability that take into account the hierarchical structure of biodiversity, distinguishing composition, structure and function at the different levels of biological organization: ecosystem and landscape, community, and population and genetic levels. We evaluated the advantages of selecting and combining indicators of different hierarchical levels by examining several use and management projects. Examples of transformed land like large-scale plantations, perform well when evaluated by ecosystem-level indicators, but lead to neglect of some composition and structure components if evaluated at different levels. Limitations in using a small number of indicators become evident in cases of intensive exploitation of resources, such as the extractive reserves, which yield good results under the ecosystem and community levels, but fail under the population and genetic indicators. Wild species management, a common example of the use of population-level indicators, do not perform well under other indicators at broader scales. We also reviewed projects that are sustainable at different hierarchical levels, like some multispecific exploitation forestry management, in which harvesting of resources is at or below sustainable levels, selective extraction is performed, and where natural regeneration and recruitment of species is allowed. It is evident that the adequacy of indicators is not universal and must take into account the complexity of processes and variables involved in the different biological levels and human components, highlighting possible conflicts and contradictions, while increasing knowledge about maintenance of quality in the use and exploitation of resources that the relevant stakeholders regard as important MH - Australia MH - Mexico|Distrito Federal PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0044-7447 UR - ISI:000087670400004 L2 - POPULATION; ECOSYSTEM; CHOICE SO - Ambio 2000 ;29(3):136-142 1905 UI - 14385 AU - Soderberg BC AU - Wallace JM AU - Tamariz J AD - W Virginia Univ, Morgantown, WV 26506, USAEscuela Natl Sci Biol, Dept Organ Chem, Mexico City, DF, Mexico TI - Novel palladium catalyzed synthesis of quinoxalines and quinoxalinones MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000166091300707 SO - Abstracts of Papers of the American Chemical Society 2000 ;220():U119-U119 1906 UI - 15760 AU - Sohlenkamp C AU - de Rudder KEE AU - Rohrs V AU - Lopez-Lara IM AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoTech Univ Berlin, Inst Biotechnol, D-13353 Berlin, GermanyGeiger, O, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apdo Postal 565-A, Cuernavaca 62210, Morelos, Mexico TI - Cloning and characterization of the gene for phosphatidylcholine synthase AB - Phosphatidylcholine (PC) is the major membrane-forming phospholipid in eukaryotes and can be synthesized by either of two pathways, the CDP-choline pathway or the methylation pathway. In prokaryotes only the methylation pathway was thought to occur. Recently, however, we could demonstrate (de Rudder, K. E. E., Sohlenkamp, C., and Geiger, O. (1999) J. Biol. Chem. 274, 20011-20016) that a second pathway for phosphatidylcholine biosynthesis exists in Sinorhizobium (Rhizobium) meliloti involving a novel enzymatic activity, phosphatidylcholine synthase, that condenses choline and CDP-diacylglyceride in one step to form PC and CMP, Using a colony autoradiography method we have isolated mutants of S. meliloti deficient in phosphatidylcholine synthase and which are no longer able to incorporate radiolabeled choline into PC. Complementation of such mutants with a sinorhizobial cosmid gene bank, subcloning of the complementing fragment, and sequencing of the subclone led to the identification of a gene coding for a presumptive CDP-alcohol phosphatidyltransferase, Amplification of this gene and its expression in Escherichia coli demonstrates that it codes for phosphatidylcholine synthase, Genomes of some pathogens (Pseudomonas aeruginosa and Borrelia burgdorferi) contain genes similar to the sinorhizobial gene (pcs) for phosphatidylcholine synthase, Although pcs-deficient S. meliloti knock-out mutants show wild type-like growth and lipid composition, they are unable to perform rapid PC biosynthesis that normally is achieved via the phosphatidylcholine synthase pathway in S. meliloti wild type MH - Germany MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000087815900042 L2 - ENCODING PHOSPHATIDYLSERINE SYNTHASE; SACCHAROMYCES-CEREVISIAE; NUCLEOTIDE-SEQUENCE; RHIZOBIUM-MELILOTI; ESCHERICHIA-COLI; PHOSPHATIDYLGLYCEROPHOSPHATE SYNTHASE; RHODOBACTER-SPHAEROIDES; SINORHIZOBIUM-MELILOTI; EXPRESSION; MUTAGENESIS SO - Journal of Biological Chemistry 2000 ;275(25):18919-18925 1907 UI - 15220 AU - Solares JV AU - Riemann BI AU - Zuazo ACR AU - Riemann CD AD - Hosp Dr Luis Sanchez Bulnes, IAP, Asociac Evitar Ceguera Mexico, Mexico City, DF, MexicoRiemann, CD, Cincinnati Eye Inst, 10494 Mongomery Rd, Cincinnati, OH 45242 USA TI - Ocular fixation to nasal periosteum with a superior oblique tendon in patients with third nerve palsy AB - Purpose: To report a new surgical approach that uses ocular fixation to the nasal periosteum with superior oblique tendon for patients with complete third nerve palsy. Methods: Prospective study of 15 patients with complete third nerve palsy who under-went surgery using a superior oblique tenectomy and ocular fixation to the nasal periosteum with the superior oblique tendon fragment. Results: Eleven (73%) patients achieved good ocular alignment, 1 (7%) patient had a cosmetically acceptable result, and 3 (20%) patients had a cosmetically unacceptable result. Five (30%) patients had preoperative diplopia; all achieved resolution of their double vision in the primary position of gaze after surgery. Two patients without preoperative diplopia did not achieve good alignment and had diplopia postoperatively. Follow-up ranged from 8-41 months (mean: 19 months). No operative complications occurred. Conclusion: Ocular fixation to the nasal periosteum with superior oblique tendon is a safe, effective, and technically undemanding option for the surgical management of patients with complete third nerve palsy MH - USA MH - Mexico|Distrito Federal PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 4 U4 - Ophthalmology;Pediatrics U5 - J;Article AV - English IS - 0191-3913 UR - ISI:000089381600002 L2 - PARALYTIC STRABISMUS; OCULOMOTOR; TRANSPOSITION; MANAGEMENT; CHILDREN; 3RD SO - Journal of Pediatric Ophthalmology & Strabismus 2000 ;37(5):260-265 1908 UI - 15592 AU - Soler F AU - Plenge-Tellechea F AU - Fortea I AU - Fernandez-Belda F AD - Univ Murcia Espinardo, Fac Vet, Dept Bioquim & Biol Mol A, E-30071 Murcia, SpainUniv Autonoma Ciudad Juarez, Ctr Estud Biol, Chihuahua 32310, MexicoFernandez-Belda, F, Univ Murcia Espinardo, Fac Vet, Dept Bioquim & Biol Mol A, E-30071 Murcia, Spain TI - Clomipramine and related structures as inhibitors of the skeletal sarcoplasmic reticulum Ca2+ pump AB - The Ca2+-pumping activity of skeletal sarcoplasmic reticulum vesicles is half-maximally inhibited by 120 mu M clomipramine, 250 mu M desipramine, and 500 mu M imipramine or trimipramine. The inhibition is attributed to the dihydrodibenzazepine moiety, since 3-(dimethylamino)propionitrile, reproducing the aliphatic amine chain, has no inhibitory action. The inhibition is shown as a marked decrease of Ca2+ binding at equilibrium in the absence of ATP and as a reduction of phosphorylation of the Ca2+-free conformation by inorganic phosphate. Therefore, the drug effect is consistent with preferential interaction of tricyclic antidepressants with the Ca2+-free conformation of the nonphosphorylated enzyme. An additional decrease in the apparent rate constant of enzyme dephosphorylation, i.e,, in the release of phosphate from ATP during enzyme cycling was also noticed MH - Mexico|Chihuahua MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 10 U4 - Biophysics;Cell Biology U5 - J;Article AV - English IS - 0145-479X UR - ISI:000088366400001 L2 - clomipramine;tricyclic antidepressants;Ca2+-pump;sarcoplasmic reticulum;skeletal muscle;ATPASE ACTIVITY; CA2+-DEPENDENT ATPASE; REACTION-MECHANISM; MEMBRANES; TRANSPORT; PHOSPHORYLATION; ANTIDEPRESSANTS; THAPSIGARGIN; SUBSTRATE; CALCIUM SO - Journal of Bioenergetics and Biomembranes 2000 ;32(2):133-142 1909 UI - 16425 AU - Soler JM AU - Beltran MR AU - Michaelian K AU - Garzon IL AU - Ordejon P AU - Sanchez-Portal D AU - Artacho E AD - Harvard Univ, Dept Phys, Lyman Lab, Cambridge, MA 02138, USAUniv Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainUniv Illinois, Dept Phys, Urbana, IL 61801, USAUniv Illinois, Mat Res Lab, Urbana, IL 61801, USASoler, JM, Harvard Univ, Dept Phys, Lyman Lab, Cambridge, MA 02138, USA TI - Metallic bonding and cluster structure AB - Knowledge of the structure of clusters is essential to predict many-of their physical and chemical properties. Using a many-body semiempirical Gupta potential (to perform global minimizations), and first-principles density functional calculations (to confirm the energy ordering Of the:local minima), we have recently found [Phys. Rev. Lett. 81, 1600 (1998)] that there are many intermediate-size disordered gold nanoclusters with energy near or below the lowest-energy ordered structure. This is especially surprising because we studied "magic" cluster sizes, for which very compact-ordered structures exist. Here, we show how the analysis of the local stress can be used to understand the physical origin:of-this amorphization. We find that the compact ordered structures, which are very stable for pair potentials are destabilized by the tendency of metallic bonds to contract at the surface, because of the decreased coordination: The amorphization is also favored by the relatively low energy associated to bondlength and coordination disorder in metals. Although these are very general properties of metallic bonding, we find that they are especially important in the case of gold, and we predict some general trends in the tendency of metallic clusters towards amorphous structures MH - Mexico|Distrito Federal MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 92 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000085707000095 L2 - EMBEDDED-ATOM METHOD; LARGE SYSTEMS; DYNAMICS; MODEL; PSEUDOPOTENTIALS; THERMODYNAMICS; POTENTIALS; MOLECULES; PARTICLES; STABILITY SO - Physical Review B 2000 ;61(8):5771-5780 1910 UI - 14363 AU - Solis-Bustos S AU - Silva-Martinez J AU - Maloberti F AU - Sanchez-Sinencio E AD - Motorola Semicond Prod Sector, Mexico Ctr Semicond Technol, Puebla, MexicoInst Nacl Astrofis Opt & Elect, Puebla, MexicoTexas A&M Univ, Dept Elect Engn, College Stn, TX 77843, USASolis-Bustos, S, Motorola Semicond Prod Sector, Mexico Ctr Semicond Technol, Puebla, Mexico TI - A 60-dB dynamic-range CMOS sixth-order 2.4-Hz low-pass filter for medical applications AB - The design and implementation of a fully integrated complementary metal-oxide-semiconductor (CMOS) sixth-order 2.4 Hz low-pass filter (LPF) for medical applications is presented, For the implementation of large-time constants both linearized operational transconductance amplifiers with reduced transconductance and impedance scalers schemes for grounded capacitors are employed. Experimental results for the filter have shown a dynamic range (DR) of 60 dB, while the harmonic distortion components are below -50 dB, The po,ver consumption for the filter is below 10 muW, the power supply is +/-1.5 V, and the active area is 1 mm(2). The filter was fabricated in a double poly double metal 0.8 mum CMOS process MH - Mexico|Puebla MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1057-7130 UR - ISI:000166849700004 L2 - impedance scaling;low-frequency filters;transconductance reduction techniques;LARGE TIME CONSTANTS; ACTIVE RC-FILTERS; NETWORKS SO - Ieee Transactions on Circuits and Systems Ii-Analog and Digital Signal Processing 2000 ;47(12):1391-1398 1911 UI - 16093 AU - Solis-Rodarte J AU - Cecenas-Falcon M AU - Ivanov KN AU - Baratta AJ AU - Edwards RM AD - Penn State Univ, Dept Mech & Nucl Engn, Nucl Engn Program, University Pk, PA 16802, USAInst Invest Elect, Unidad Energia Nucl, Cuernavaca, Morelos, MexicoIvanov, KN, Penn State Univ, Dept Mech & Nucl Engn, Nucl Engn Program, 231 Sackett Bldg, University Pk, PA 16802 USA TI - TRAC-BF1/NEM stability methodology for BWR core wide and regional stability analysis AB - A time-series analysis stability methodology is presented based on the TRAC-BF1/NEM coupled code. The methodology presented has a potential application for BWR core-wide and regional stability studies allowed by the 3D capabilities of the code. The stability analysis is performed at two different levels: using the TRAC-BF1 point kinetics model and employing the three-dimensional neutronic transient capability of the NEM code. Point kinetics calculations show power fluctuations when white noise is applied to the inlet mass flow rate of each of the channel components. These fluctuations contain information about the system stability, and are subsequently studied with time-series analysis methods. The analysis performed showed that the reactor core has a low-frequency resonance typical of BWRs. Analysis of preliminary three-dimensional calculations indicates that the power fluctuations do not contain the typical resonance at low frequency, This fact may be related to the limitation of the thermal-hydraulic (T-H) feedback representation through the use of two-dimensional tables for the cross-sections needed for 3D kinetics calculations. The results suggest that a more accurate table look-up should be used, which includes a three-dimensional representation of the feedback parameters (namely, average fuel temperature, average moderator temperature, and void fraction of the T-H cell of interest). Further research is being conducted on improving the cross-section modeling methodology, used to feed the neutron kinetics code for both steady state and transient cases. Also a comprehensive analysis of the code transient solution is being conducted to investigate the nature of the weak dependence of the power response on T-H variations during the performed 3D stability transient calculations. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0306-4549 UR - ISI:000086805100003 SO - Annals of Nuclear Energy 2000 ;27(11):985-994 1912 UI - 16638 AU - Soltero JFA AU - Bautista F AU - Pecina E AU - Puig JE AU - Manero O AU - Proverbio Z AU - Schulz PC AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Sur, Dept Quim & Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaSoltero, JFA, Univ Guadalajara, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Rheological behavior in the didodecyldimethylammonium bromide/water system AB - The phase behavior in the dilute region of the didodecyldimethylammonium bromide (DDAB)/water system is studied with a battery of techniques. The critical vesicle concentration (cvc), measured by tensiometry, conductimetry, ion-selective-electrode potentiometry and dye solubilization, is similar to the value reported in the literature. Moreover, the combination of surfactant-ion-selective-electrode and bromide-ion-selective-electrode potentiometry indicates that the vesicles are substantially ionized (alpha approximate to 0.5) in the proximity of the eve. The transition from small unilamellar vesicles to larger multilamellar liposomes was detected at 0.2 wt% by viscometry, conductimetry and dye solubilization measurements. The rheology of the DDAB/water system was studied as a function of surfactant concentration and temperature. Non-Newtonian behavior, viscoelasticity, yield stresses and time-dependent flow behavior were observed. Maxima and minima in the dynamic moduli and in conductivity are related to structural changes and phase transitions. Moreover, in time-dependent shear flow, the microstructure is modified and the rheological response shifts from thixotropic to antithixotropic or vice versa, depending on the DDAB concentration and the level and duration of the final applied stress. The conductivity behavior in the Lam(1) phase region can be qualitatively explained by the capillary superconductivity theory. This conductivity behavior occurs when the thickness of the aqueous lamella is of the same order of magnitude as the Debye length MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000084847200006 L2 - vesicles;lamellar liquid crystals;viscoelasticity;thixotropic-antithixotropic;BILAYER AQUEOUS COLLOIDS; OPTICAL MICROSCOPY; LIQUID-CRYSTALS; PHASE; WATER; MICELLES; MICROEMULSIONS; AMPHIPHILES; VESICLES; POLYMERS SO - Colloid and Polymer Science 2000 ;278(1):37-47 1913 UI - 16013 AU - Somerville MH AU - Ernst A AU - del Alamo JA AD - Vassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604, USAMcKinsey & Co, Mexico City, DF, MexicoMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139, USASomerville, MH, Vassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604 USA TI - A physical model for the kink effect in InAlAs/InGaAs HEMT's AB - We present a new model for the the kink effect in In-AlAs/InGaAs HEMT's, The model suggests that the kink is due to a threshold voltage shift which arises from a hole pile-up in the extrinsic source and an ensuing charging of the surface and/or the buffer-substrate interface. The model captures the many of the observed behaviors of the kink, including the kink's dependence on bias, time, temperature, illumination, and device structure. Using the model, we have developed a simple equivalent circuit, which reproduced well the kink's de characteristics, its time evolution in the nanosecond range, and its dependence on illumination MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 24 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9383 UR - ISI:000087081700004 L2 - HEMT;InAlAs;InGaAs;kink effect;IMPACT IONIZATION; TRANSISTORS; SIMULATION; BREAKDOWN; MECHANISM; HFETS; LAYER; MBE SO - Ieee Transactions on Electron Devices 2000 ;47(5):922-930 1914 UI - 16121 AU - Song L AU - Delpire E AU - Gamba G AU - Mount DB AD - Vanderbilt Univ, Nashville, TN, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - Localization of the K+-Cl- cotransporters KCC3 and KCC4 in mouse kidney MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918101972 SO - Faseb Journal 2000 ;14(4):A341-A341 1915 UI - 15684 AU - Song SX AU - Lopez-Valdivieso A AU - Reyes-Bahena JL AU - Bermejo-Perez HI AU - Trass O AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 1A4, CanadaSong, SX, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550,Lomas 2A Secc, San Luis Potosi 78210, Mexico TI - Hydrophobic flocculation of galena fines in aqueous suspensions AB - The hydrophobic flocculation of galena fines induced by potassium amyl xanthate (PAX) in aqueous suspensions has been studied using laser diffraction, electrophoretic light scattering, contact angle, and microflotation measurements. The measurements were performed on <2 mu m, 2-5 mu m, 5-10 mu m, and <30 mu m size galena by varying several parameters, including PAX concentration, pH, original particle size, kerosene concentration, and suspension stirring. The experimental results have demonstrated that the hydrophobic flocculation was closely correlated with the particle hydrophobicity, but was not lowered upon increasing the particle surface charges due to PAX adsorption, which is contrary to the DLVO theory. This flocculation has been observed to increase with a reduction of the original particle size and an increase in kerosene concentration, and to require sufficient stirring strength and magnitudes of kinetic energy input to achieve the maximum aggregation degree. From the microflotation results, it has been found that the flotation response of galena fines is markedly improved due to the formation of hydrophobic flocs, suggesting that flee flotation is a promising means to recover galena in the fine size range. (C) 2000 Academic Press MH - Canada MH - Mexico|San Luis Potosi PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000088126100003 L2 - hydrophobic flocculation;galena fines;contact angle;zeta potential;floc size;floc flotation;nonpolar oil enhancement;SHEAR-FLOCCULATION; ELECTROLYTE SOLUTIONS; FLOTATION; FORCES; PARTICLES; HEMATITE; SILICA; AGGREGATION; COAGULATION; MONOLAYERS SO - Journal of Colloid and Interface Science 2000 ;227(2):272-281 1916 UI - 15375 AU - Soriano-Garcia M AU - Henao-Martinez JA AU - Palma AR AU - Kpuznetsov VV AD - Natl Autonomous Univ Mexico, Inst Quim, Dept Bioestruct, Mexico City 04510, DF, MexicoUniv Ind Santander, Fac Ciencias, Escuela Quim, Bucaramanga, ColombiaSoriano-Garcia, M, Natl Autonomous Univ Mexico, Inst Quim, Dept Bioestruct, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Crystal structure of spiro[cyclohexane-1,2 '-6 '-methoxy-1 '-(alpha-chloroacetyl)-1 ',2 ',3 ',4 '-tetrahydro-4 '-methylquinoline] MH - Colombia MH - Mexico|Distrito Federal PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000088949200021 L2 - DERIVATIVES SO - Analytical Sciences 2000 ;16(8):889-890 1917 UI - 15393 AU - Sosa-Blanco C AU - Hodouin D AU - Bazin C AU - Lara-Valenzuela C AU - Salazar J AD - Serv Ind Penoles SA CV, Monterrey 64010, Nuevo Leon, MexicoUniv Laval, Dept Min & Met, St Foy, PQ G1K 7P4, CanadaCo Fresnillo SA CV, Zacatecas 99000, MexicoSosa-Blanco, C, Serv Ind Penoles SA CV, Profr Antonio Coello 310 Nte Colonia Obrera, Monterrey 64010, Nuevo Leon, Mexico TI - Economic optimisation of a flotation plant through grinding circuit tuning AB - The paper describes a procedure to tune a grinding circuit in order to maximise the economic efficiency of the flotation plant. The optimisation process is performed ruing a plant simulator based on phenomenological models of grinding and flotation and an empirical model for predicting the minerals size distribution from the ore size distribution of the grinding circuit product. The economic efficiency of the plant is assessed either by the net smelter return per ton of ore or the net revenue of the concentrator. The approach is illustrated for a lead-silver-gold plant located in Mexico and shows that the economic efficiency of this plant could be increased by 10 to 20%. (C) 2000 Published by Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Nuevo Leon MH - Mexico|Zacatecas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0892-6875 UR - ISI:000088842000002 L2 - flotation;grinding;process optimisation;liberation;simulation;MODEL SO - Minerals Engineering 2000 ;13(10-11):999-1018 1918 UI - 16156 AU - Sosa N AU - Zaragoza EA AU - Lopez RG AU - Peralta RD AU - Katime I AU - Becerra F AU - Mendizabal E AU - Puig JE AD - Ctr Invest Quim Aplicadao, Saltillo 25100, Coahuila, MexicoUniv Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, E-48080 Bilbao, SpainUniv Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoPeralta, RD, Ctr Invest Quim Aplicadao, Blvd Ing Enrique Reyna H 140, Saltillo 25100, Coahuila, Mexico TI - Unusual free radical polymerization of vinyl acetate in anionic microemulsion media AB - The polymerization of vinyl acetate in one-phase o/w microemulsions stabilized with Aerosol OT (AOT) is examined as a function of concentration and type of initiator(V-50 and KPS) and temperature. Conversions and reaction rates increase with increasing concentration of V-50 and temperature. Faster polymerization rates and higher conversions are achieved with RPS because of the different electrostatic interactions between the charged microemulsion droplets and the free radicals of KPS and V-50. Average molar masses and polydispersity indexes ((M) over bar(W)/(M) over bar(n)) are much smaller than those observed in emulsion polymerization using the same surfactant, even at high conversions. Analysis of the molar mass distribution indicates that chain-transfer reactions to monomer are the controlling chain-growth mechanism in the polymerization of vinyl acetate in AOT microemulsions at all conversions MH - Mexico|Coahuila MH - Mexico|Jalisco MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000086484100008 L2 - 3-COMPONENT CATIONIC MICROEMULSIONS; METHYL-METHACRYLATE; EMULSION POLYMERIZATION; STYRENE POLYMERIZATION; PARTICLE NUCLEATION; CHAIN TRANSFER; KINETICS; SPECTROSCOPY; MECHANISM; BROMIDE SO - Langmuir 2000 ;16(8):3612-3619 1919 UI - 15073 AU - Soto-Bernal JJ AU - Rosas E AU - Pinto-Robledo V AU - Aboites V AU - Damzen MJ AD - Ctr Invest Opt, Lab Laseres, Leon 37000, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, EnglandSoto-Bernal, JJ, Ctr Invest Opt, Lab Laseres, AC Apartado Postal 1-948, Leon 37000, Mexico TI - Spatial mode size analysis of a diode-side-pumped Nd : YVO4 laser resonator AB - We present an ABCD transfer matrix spatial mode analysis of a diode-side-pumped Nd:YVO4 laser resonator. The stability of the resonator is analyzed in order to obtain the sets of positions for the optical elements that lead to stable cavity configurations for the diode-side-pumped Nd:YVO4 laser resonator. The mode spot size behavior of the oscillating Gaussian beam in the sagittal and tangential planes is used to determine the best configuration for the diode-side-pumped Nd:YVO4 laser resonator. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000089759300026 L2 - ABCD matrices;Gaussian beams;diode-pumped lasers;Nd : YVO4;TRANSFER UP-CONVERSION; MU-M; OSCILLATORS; AMPLIFIER; CRYSTALS SO - Optics Communications 2000 ;184(1-4):201-207 1920 UI - 15482 AU - Soto-Pinto L AU - Perfecto I AU - Castillo-Hernandez J AU - Caballero-Nieto J AD - Colegio Frontera Sur, San Cristobal 29200, Chiapas, MexicoUniv Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109, USAUniv Nacl Autonoma Mexico, Jardin Bot, Mexico City 04510, DF, MexicoSoto-Pinto, L, Colegio Frontera Sur, Apartado Postal 63, San Cristobal 29200, Chiapas, Mexico TI - Shade effect on coffee production at the northern Tzeltal zone of the state of Chiapas, Mexico AB - The necessity of on-farm research to assess the relationship between shade ecological features and yields has been broadly recognised. On this basis, a more sustainable coffee system could be developed, with better conservation of natural resources. An on-farm research project was conducted in the municipality of Chilon. Chiapas, Mexico, with the objectives of investigating the effect of shade structure on coffee grain yield and assessing the potential uses of associated plant species. Results showed that shade cover percentage and coffee shrub density had significant effects on yields. Maintaining coffee shrub density as a constant, a regression equation related yield to percentage shade by a quadratic polynomial. Coffee density had a significant effect on yields but shade tree density had no effect. Coffee cultivar, age of coffee stand, species richness, shade tree density, basal area, slope and aspect did not have significant effects on coffee yields. Shade tree cover had a positive effect between 23 and 38% shade cover and yield was then maintained up to 48%. Production may decrease under shade cover >50%. A total of 61 shade species were found, with an average density of 260 trees per hectare, the majority of them being indigenous species, used as food, construction materials and as firewood. The role of ecological features associated with shade on yields and availability of natural resources obtained from coffee systems are discussed. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 29 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000088678700005 L2 - coffee;cover;shade;agroforestry;on-farm research;Mexico;BIODIVERSITY; PLANTATIONS SO - Agriculture Ecosystems & Environment 2000 ;80(1-2):61-69 1921 UI - 16110 AU - Soto-Valdez H AU - Gramshaw JW AD - Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Leeds, Procter Dept Food Sci, Leeds LS2 9JT, W Yorkshire, EnglandSoto-Valdez, H, Ctr Invest Alimentac & Desarrollo, AC Apdo Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Cyclopentanone and cyclopentanone derivatives as degradation products of polyamide 6,6 MH - United Kingdom MH - Mexico|Sonora PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000086678000001 SO - Journal of Materials Science Letters 2000 ;19(10):823-825 1922 UI - 14299 AU - Soto CAT AU - Arissawa M AU - Lara JG AU - Mondragon MA AD - Univ Fed Fluminense, Inst Quim, Dept Fisicoquim, BR-24210150 Rio De Janeiro, BrazilNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUNAM, Inst Fis, Queretaro 76001, MexicoSoto, CAT, Univ Fed Fluminense, Inst Quim, Dept Fisicoquim, Morro do Valonguinho S-N,Niteroi Ctr, BR-24210150 Rio De Janeiro, Brazil TI - Fourier transform infrared and Raman spectra of uranyl bis(2-hydroxybenzaldehyde): UO2(sal)(2) AB - The Fourier transform infrared and Raman spectra of solid uranyl bis(2-hydroxybenzaldehyde) were measured in the 4000-70 cm(-1) region. The fundamental skeletal vibrational modes were assigned by comparison with the spectra of other uranyl complexes. The ligand bands in the complex were assigned with the aid of the infrared spectrum of the 2-hydroxybenzaldehyde calculated by the AM1 semi-empirical method, and with the aid of its experimental infrared absorption bands and Raman shifts. A normal coordinate analysis had been carried out to verify the experimental assignments of the [UO2L2] framework. Force constants for the skeletal vibrations of this complex were calculated. The polarized Raman spectrum of 2-hydroxybenzaldehyde is also reported. (C) 2000 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000166064800016 L2 - Fourier transform infrared and Raman spectra;uranyl bis(2-hydroxybenzaldehyde);force constants;COMPLEXES SO - Polyhedron 2000 ;19(22-23):2353-2360 1923 UI - 15481 AU - Spooner DM AU - Rivera-Pena A AU - Van den Berg RG AU - Schuler K AD - Univ Wisconsin, Dept Hort, Agr Res Serv, USDA, Madison, WI 53706, USAINIFAP, Metepec, Estado Mexico, Programa Nacl Papa, Mexico City, DF, MexicoWageningen Univ & Res Ctr, Dept Plant Taxonomy, NL-6700 ED Wageningen, NetherlandsIPK, Genbank, D-18190 Gross Lusewitz, GermanySpooner, DM, Univ Wisconsin, Dept Hort, Agr Res Serv, USDA, 1575 Linden Dr, Madison, WI 53706 USA TI - Potato germplasm collecting expedition to Mexico in 1997: Taxonomy and new germplasm resources AB - Wild potato (Solanum sect. Petota) germplasm has been collected in Mexico on nine major expeditions, as determined by 20 collections or more from each expedition currently at the United States potato genebank, the National Research Support Program-6 (NRSP-6). These have resulted in 609 accessions with good collection data. In addition, NRSP-6 has germplasm of approximately 90 other Mexican collections that are unspecific regarding date or place of collection. This expedition was funded to collect those remaining collections with no or little germplasm: Solanum clarum, S. x edinense, S. hintonii, S. hjertingii var. physaloides, S. leptosepalum, S. lesteri, S. macropilosum, S. x michoacanum, S. x sambucinum, and S. stenophyllidium. In addition, some species and species groups (species groups indicated in parentheses) have unresolved taxonomic problems that needed clarification by additional field collections. These are (S. agrimonifolium and S. oxycarpum), (S. brachycarpum, S. guerreroense, S. hougasii, and S. iopetalum - the S. brachycarpum complex), (S.fendleri, S. papita, S. stoloniferum - the S. stoloniferum complex), S. leptosepalum, and S. macropilosum.We conducted a wild potato germplasm collecting expedition in Mexico from August 22 to October 31, 1997. Our 103 collections, 71 as germplasm collections, provide the first germplasm samples for S. hjertingii var. physaloides, S. leptosepalum, and S. macropilosum. They provide additional germplasm of the rare species S. clarum, S. x edinense, S. lesteri, S. x michoacanum, S. x sambucinum, and S. stenophyllidium. We additionally gathered germplasm and field data to help resolve taxonomic difficulties in S. agrimonifolium and S. oxycarpum, the S. brachycarpum complex, and the S. stoloniferum complex MH - Germany MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - ORONO: POTATO ASSOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0003-0589 UR - ISI:000088771700007 L2 - BREVICAULE COMPLEX SOLANACEAE; SOLANUM SECT PETOTA; SPECIES BOUNDARIES; WILD; COLLAPSE SO - American Journal of Potato Research 2000 ;77(4):261-270 1924 UI - 15976 AU - Sprott DA AU - Vogel-Sprott MD AD - Ctr Invest Matemat, Guanajuato, MexicoUniv Waterloo, Dept Psychol, Waterloo, ON N2L 3G1, CanadaSprott, DA, Ctr Invest Matemat, Guanajuato, Mexico TI - A capture-recapture method to estimate the incidence of alcohol-related problems MH - Canada MH - Mexico|Guanajuato PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Substance Abuse U5 - J;Letter AV - English IS - 0145-6008 UR - ISI:000087216000022 SO - Alcoholism-Clinical and Experimental Research 2000 ;24(5):743-744 1925 UI - 14035 AU - Srivastava A AU - Darszon A AU - Strasser RJ AD - Univ Geneva, Bioenerget Lab, CH-1254 Geneva, SwitzerlandUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Genet & Physiol, Cuernavaca 62191, Morelos, MexicoSrivastava, A, Univ Geneva, Bioenerget Lab, CH-1254 Geneva, Switzerland TI - Influence of water on the primary photosynthetic activity of Rhodospirillum rubrum in reverse micelles AB - The effect of water on the primary photosynthetic activity of purple bacterium Rhodospirillum rubrum was studied in Hexadecane-Tween-Spane (HTS)- and phospholipid (PLC)-reverse micelles. Reverse micelles offer the possibility of modulating the amount of water to which enzymes and multienzymatic complexes are exposed. Fast bacteriochlorophyll (BChl) fluorescence induction kinetics and reaction centre absorption changes at 820 nn were used as an assay for the functional transfer of bacterial cells into I HTS-reverse micelles and bacterial photosynthetic complexes (BPC) into PLC-reverse micelles. Both the bacterial cells and BPC showed an increase in the rate of primary photosynthetic activity by increasing the concentration of water in the reverse micelles. The bacterial cells could be kept viable for many hours in MTS-reverse micelles in presence of 6 % (v/v) water. NMR studies indicated that the photosynthetic activity was affected by the availability of water in reverse micelles. The bacterial cells in HTS or BPC in PLC reverse micelles could be used to further understand the influence of water on the organisation and function of photosynthetic complexes MH - Mexico|Morelos MH - Switzerland PB - PRAGUE 6: ACAD SCI CZECH REPUBLIC, INST EXPERIMENTAL BOTANY RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0300-3604 UR - ISI:000167710400003 L2 - absorbance;bacteriochlorophyll fluorescence;hexadecane-tween-spane reverse micelles;nuclear magnetic resonance;phospholipid reverse micelles;IN-OIL MICROEMULSION; CYTOCHROME-C-OXIDASE; ORGANIC-SOLVENTS; YEAST-CELLS; MEMBRANES; HYDRATION; MOLECULES; COMPLEXES; ENZYMES; SYSTEMS SO - Photosynthetica 2000 ;38(3):333-341 1926 UI - 16194 AU - Stangl D AU - Huerta G AD - Duke Univ, Sanford Inst Publ Policy, Inst Stat & Decis Sci, Durham, NC 27708, USACtr Mat Res, Dept Probabil & Stat, Guanajuato 36000, GTO, MexicoStangl, D, Duke Univ, Sanford Inst Publ Policy, Inst Stat & Decis Sci, Box 90251, Durham, NC 27708 USA TI - Assessing the impact of managed-care on the distribution of length-of-stay using Bayesian hierarchical models AB - Hierarchical models provide a useful framework for the complexities encountered in policy-relevant research in which the impact of social programs is being assessed. Such complexities include multi-site data, censored data and over-dispersion. In this paper, Bayesian inference through Markov Chain Monte Carlo methods is used for the analysis of a complex hierarchical log-normal model that shows the impact of a managed care strategy aimed at limiting length of hospital stays. Parameters in this model allow for variability in baseline length-of-stay as well as the program effect across hospitals. The authors demonstrate elicitation and sensitivity analysis with respect to prior distributions. All calculations for the posterior and predictive distributions were obtained using the software BUGS MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Interdisciplinary Applications;Statistics & Probability U5 - J;Article AV - English IS - 1380-7870 UR - ISI:000086420500002 L2 - hierarchical log-normal model;prior elicitation;Gibbs sampling;predictive distribution;health policy;CANCER CLINICAL-TRIAL; SURVIVAL-DATA; FRAILTY SO - Lifetime Data Analysis 2000 ;6(2):123-139 1927 UI - 15520 AU - Stephens W AU - Tyrrel SF AU - Tiberghien JE AD - Cranfield Univ, Inst Water & Environm, Bedford MK45 4DT, EnglandInst Ciencias Agr, Irapuato 36500, MexicoTyrrel, SF, Cranfield Univ, Inst Water & Environm, Bedford MK45 4DT, England TI - Irrigating short rotation coppice with landfill leachate: constraints to productivity due to chloride AB - A pot-based experiment was conducted to determine the effect of different chloride concentrations (0-422 mmol l(-1)) on the growth of transplanted saplings of Salix viminalis (clone Q683). Chloride had a very rapid effect on the growth and development of the willow plants and on evapotranspiration (ETa). The degree of reduction in ETa of willows was directly related to chloride concentration and, in the short term, evaporative demand. Sustainable growth and development of willow is unlikely at chloride concentrations greater than 70 mmol l(-1). Further investigations into the management of solute accumulation in the root zone are required in order to develop effective landfill leachate irrigation strategies for trees. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 10 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000088620700009 L2 - chloride;landfill;leachate;short rotation coppice;Salix SO - Bioresource Technology 2000 ;75(3):227-229 1928 UI - 15407 AU - Stevens JD AU - Bonfil R AU - Dulvy NK AU - Walker PA AD - CSIRO, Hobart, Tas 7001, AustraliaInst Nacl Pesca, Mexico City 03310, DF, MexicoUniv Newcastle Upon Tyne, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandNatl Inst Coastal & Marine Management RIKZ, NL-9750 AE Haren, NetherlandsStevens, JD, CSIRO, GPO Box 1538, Hobart, Tas 7001, Australia TI - The effects of fishing on sharks, rays, and chimaeras (chondrichthyans), and the implications for marine ecosystems AB - The impact of fishing on chondrichthyan stocks around the world is currently the focus of considerable international concern. Most chondrichthyan populations are of low productivity relative to teleost fishes, a consequence of their different life-history strategies. This is reflected in the poor record of sustainability of target shark fisheries. Most sharks and some batoids are predators at, or near, the top of marine food webs. The effects of fishing are examined at the single-species level and through trophic interactions. We summarize the status of chondrichthyan fisheries from around the world. Some 50% of the estimated global catch of chondrichthyans is taken as by-catch, does not appear in official fishery statistics, and is almost totally unmanaged. When taken as by-catch, they are often subjected to high fishing mortality directed at teleost target species. Consequently, some skates, sawfish, and deep-water dogfish have been virtually extirpated From large regions. Some chondrichthyans are more resilient to fishing and we examine predictions on the vulnerability of different species based on their life-history and population parameters. At the species level, fishing may alter size structure and population parameters in response to changes in species abundance. We review the evidence for such density-dependent change. Fishing can affect trophic interactions and we examine cases of apparent species replacement and shifts in community composition. Sharks and rays learn to associate trawlers with food and feeding on discards may increase their populations. Using ECOSIM, we make some predictions about the long-term response of ecosystems to fishing on sharks. Three different environments are analysed: a tropical shelf ecosystem in Venezuela, a Hawaiian coral reef ecosystem, and a North Pacific oceanic ecosystem. (C) 2000 International Council for the Exploration of the Sea MH - Australia MH - Mexico|Distrito Federal MH - Netherlands MH - United Kingdom PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 119 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1054-3139 UR - ISI:000088880200004 L2 - community structure;ECOSIM;ecosystem;elasmobranchs;extinction;fishing effects;mass-balance model;population impacts;species replacement;species vulnerability;trophic interactions;NEW-SOUTH-WALES; NORTH-SEA; SPECIES COMPOSITION; PRAWN TRAWLERS; LIFE-HISTORIES; MORETON-BAY; GUMMY SHARK; AUSTRALIA; FISHERIES; MANAGEMENT SO - Ices Journal of Marine Science 2000 ;57(3):476-494 1929 UI - 15259 AU - Stewart GT AU - Fiala C AU - Kohnlein C AU - Herxheimer A AU - Duesberg P AU - Rasnick D AU - Giraldo R AU - Kothari M AU - Bialy H AU - Geshekter C AD - Stadt Krankenhaus, Kiel, GermanyUniv Calif Berkeley, Berkeley, CA 94720, USASeth GS Med Coll, Bombay, Maharashtra, IndiaNatl Univ, Mexico City, DF, MexicoCalif State Univ Los Angeles, Chico, CA 95929, USAMEDUNSA, Johannesburg, South AfricaUniv Toronto, Toronto, ON, CanadaStewart, GT, 3 Lexden Terrace, Tenby SA70 7BJ, Pembroke, Wales TI - The Durban Declaration is not accepted by all MH - Canada MH - Germany MH - India MH - Mexico|Distrito Federal MH - South Africa MH - USA MH - United Kingdom PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 4 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0028-0836 UR - ISI:000089390700017 SO - Nature 2000 ;407(6802):286-286 1930 UI - 14474 AU - Steyer JP AU - Pelayo-Ortiz C AU - Gonzalez-Alvarez V AU - Bonnet B AU - Bories A AD - Univ Guadalajara, CUCEI, Dept Chem Engn, Guadalajara 44430, Jalisco, MexicoINRA, Lab Biotechnol Environm, Narbonne, FranceGonzalez-Alvarez, V, Univ Guadalajara, CUCEI, Dept Chem Engn, Guadalajara 44430, Jalisco, Mexico TI - Neural network modelling of a depollution process AB - In this paper an artificial neural network is developed to model a new depollution process that uses sequential cultures of anaerobic bacteria and yeasts to efficiently remove both carbon and nitrogen from wastewaters. A set of batch experimental runs are used to train and test various neural network topologies. It is shown that the neural network accurately tracks the dynamics of the biological species of the yeast reactor in the process and account for the influence of butyric acid, ammonia and pH on the overall efficiency of purification MH - France MH - Mexico|Jalisco PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0178-515X UR - ISI:000166449800029 SO - Bioprocess Engineering 2000 ;23(6):727-730 1931 UI - 14995 AU - Stifter D AU - Bonanni A AU - Garcia-Rocha M AU - Schmid M AU - Hingerl K AU - Sitter H AD - Profactor GmbH, A-4400 Steyr, AustriaJohannes Kepler Univ, Inst Semicond Phys, A-4040 Linz, AustriaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoGarcia-Rocha, M, Profactor GmbH, Wehrgrabengasse 5, A-4400 Steyr, Austria TI - In situ reflectance difference spectroscopy of p-type ZnTe : N grown by MBE AB - In situ Reflectance Difference Spectroscopy (RDS) was performed during p-type of nitrogen-doped ZnTe thin films grown by Molecular Beam Epitaxy (MBE). The MBE system is equipped with an electron cyclotron resonance (ECR) cell for N-plasma generation. The RDS system is attached via a strain-free fused silica viewport mounted for normal incidence. This allows us to take RD spectra during the doping process in the range from 1.5 to 5.5 eV. The doping level of the ZnTe:N films was determined in situ by evaluating the RD spectra in the vicinity of the E-1 and E-1 + Delta (1) transitions. This spectral range was used to get the optimum conditions in the online doping performance of the plasma cell. We varied cell parameters like N-pressure and input r.f. power. Furthermore, we investigated doping-induced surface processes, like surface saturation with activated N-species. Finally, ex situ measured spectra are compared with in situ acquired data, in order to study the surface Fermi level pinning at ambient pressures. (C) 2000 Elsevier Science S.A. All rights reserved MH - Austria MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900011 L2 - in situ measurements;molecular beam epitaxy (MBE);reflection spec.;semiconductors;CYCLOTRON-RESONANCE PLASMA; OPTICAL ANISOTROPIES; ZNSE SO - Thin Solid Films 2000 ;373(1-2):41-45 1932 UI - 14877 AU - Stock KD AU - Hofer H AU - Romero JGS AU - Galvan LPG AU - Schmid W AD - Phys Tech Bundesanstalt, D-38116 Braunschweig, GermanyCENAM, Queretaro 76900, MexicoStock, KD, Phys Tech Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany TI - Cryogenic radiometer facility of the CENAM and first international comparison AB - A new modern cryogenic radiometer facility has recently been installed at the Centro National de Metrologia (CENAM), Queretaro, Mexico. The radiometer head is a CryoRad II (CRI Inc., Boston, USA). In a specially designed laboratory with clean-room atmosphere, the facility is now ready for calibrations of detectors with power-stabilized laser radiation. This cryogenic radiometer facility will be the basis for most of the radiometric and photometric calibrations of the CENAM. A first radiometric comparison between the CENAM and the Physikalisch-Technische Bundesanstalt (PTB), Germany, was carried out with trap detectors at the He-Ne laser wavelength of 632.8 nm. Two reflection trap detectors, each with three photodiodes, were used: one with 10 mm x 10 mm and the other with 18 mm x 18 mm Si photodiodes. The results were very encouraging. At power levels of about 100 muW the calibrations showed a relative difference of 7 x 10(-5) or even less. The PTB calibrations are based on a modified LaseRad II (CRI) radiometer that has been compared with cryogenic radiometers of other types and from other national metrology institutes MH - Germany MH - Mexico|Queretaro PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000165333600001 L2 - QUANTUM EFFICIENCY; TRAP DETECTORS; NONLINEARITY; NM SO - Metrologia 2000 ;37(4):269-271 1933 UI - 16691 AU - Strainic MG AU - Sullivan JJ AU - Collado-Vides J AU - deHaseth PL AD - Case Western Reserve Univ, Sch Med, Dept Biochem, Cleveland, OH 44106, USAUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62100, Morelos, MexicodeHaseth, PL, Case Western Reserve Univ, Sch Med, Dept Biochem, 10900 Euclid Ave, Cleveland, OH 44106 USA TI - Promoter interference in a bacteriophage lambda control region: Effects of a range of interpromoter distances AB - The p(R) and p(RM) promoters of bacteriophage lambda direct transcription in divergent directions from start sites separated by 83 phosphodiester bonds. We had previously shown that the presence of an RNA polymerase at p(R) interfered with open complex formation at p(RM) and that this effect was alleviated by the deletion of 10 bp between the two promoters. Here we present a detailed characterization of the dependence of the interference on the interpromoter distance. It was found that the reduced interference between the two promoters is unique to the 10-bp deletion. The relief of interference was demonstrated to be due to the facilitation of a step subsequent to RNA polymerase binding to the p(RM) promoter. A model to explain these observations is proposed. A search of known Escherichia coli promoters identified three pairs of divergent promoters with similar separations to those investigated here MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000084269400030 L2 - ESCHERICHIA-COLI K-12; OPEN COMPLEX-FORMATION; RNA-POLYMERASE; NUCLEOTIDE-SEQUENCE; TRANSCRIPTION INITIATION; BACTERIAL PROMOTERS; STRUCTURAL-ANALYSIS; REGULATORY REGION; PAIR DELETION; PRM PROMOTER SO - Journal of Bacteriology 2000 ;182(1):216-220 1934 UI - 15588 AU - Struk B AU - Cai L AU - Zach S AU - Chung WJJ AU - Lumsden A AU - Stumm M AU - Huber M AU - Schaen L AU - Kim CA AU - Goldsmith LA AU - Viljoen D AU - Figuera LE AU - Fuchs W AU - Munier F AU - Ramesar R AU - Hohl D AU - Richards R AU - Neldner KH AU - Lindpaintner K AD - Childrens Hosp, Dept Cardiol, Boston, MA 02115, USABrigham & Womens Hosp, Div Cardiovasc, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Cardiol, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Med, Boston, MA 02115, USAMax Delbruck Ctr Mol Med, D-13122 Berlin, GermanyF Hoffmann La Roche & Co Ltd, Roche Genet, Div Pharmaceut, CH-4070 Basel, SwitzerlandUniv Lausanne, Dept Dermatol, CH-1011 Lausanne, SwitzerlandWomens & Childrens Hosp, Dept Cytogenet & Mol Genet, N Adelaide, SA 5006, AustraliaOtto von Guericke Univ, Inst Human Genet, Magdeburg, GermanyUniv Rochester, Dept Dermatol, Rochester, NY 14642, USAS African Inst Med Res, ZA-2000 Johannesburg, South AfricaUniv Guadalajara, Sch Med, IMSS, CIBO,Div Genet, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Sch Med, IMSS, CIBO,Div Mol Med, Guadalajara 44430, Jalisco, MexicoCUNY Mt Sinai Sch Med, Dept Ophthalmol, New York, NY 10029, USAUniv Lausanne, Dept Ophthalmol, CH-1011 Lausanne, SwitzerlandUniv Cape Town, Sch Med, Dept Human Genet, ZA-7925 Cape Town, South AfricaUniv Adelaide, Dept Genet, Adelaide, SA 5000, AustraliaTexas Tech Univ, Hlth Sci Ctr, Dept Dermatol, Lubbock, TX 79430, USAStruk, B, Childrens Hosp, Dept Cardiol, 300 Longwood Ave, Boston, MA 02115 USA TI - Mutations of the gene encoding the transmembrane transporter protein ABC-C6 cause pseudoxanthoma elasticum AB - We recently published the precise chromosomal localization on chromosome 16p13.1 of the genetic defect underlying pseudoxanthoma elasticum (PXE), an inherited disorder characterized by progressive calcification of elastic fibers in skin, eye, and the cardiovascular system. Here we report the identification of mutations in the gene encoding the transmembrane transporter protein, ABC-C6 (also known as MRP-6), one of the four genes located in the region of linkage, as cause of the disease. Sequence analysis in four independent con sanguineous families from Switzerland, Mexico, and South Africa and in one non-consanguineous family from the United States demonstrated several different mis-sense mutations to cosegregate with the disease: phenotype. These findings are consistent with the conclusion that PXE is a recessive disorder that displays allelic heterogeneity, which may explain the considerable phenotypic variance characteristic of the disorder MH - USA MH - Australia MH - Germany MH - Mexico|Jalisco MH - South Africa MH - Switzerland PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 54 U4 - Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0946-2716 UR - ISI:000088339600007 L2 - Pseudoxanthoma elasticum;membrane transporter proteins;ATP binding cassette proteins;ABC-C6 SO - Journal of Molecular Medicine-Jmm 2000 ;78(5):282-286 1935 UI - 15372 AU - Styblo M AU - Del Razo LM AU - Vega L AU - Germolec DR AU - LeCluyse EL AU - Hamilton GA AU - Reed W AU - Wang C AU - Cullen WR AU - Thomas DJ AD - Univ N Carolina, Sch Med, Dept Pediat, Chapel Hill, NC 27599, USAIPN, CINVESTAV, Dept Pharmacol & Toxicol, Environm Toxicol Sect, Mexico City 07738, DF, MexicoNatl Inst Environm Hlth Sci, Environm Immunol Lab, Res Triangle Pk, NC 27709, USAUniv N Carolina, Sch Pharm, Div Drug Delivery & Disposit, Chapel Hill, NC 27599, USAUniv N Carolina, Ctr Environm Med & Lung Biol, Chapel Hill, NC 27599, USAUniv British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, CanadaUS EPA, NHEERL, Expt Toxicol Div, Pharmacokinet Branch, Res Triangle Pk, NC 27711, USAStyblo, M, Univ N Carolina, Sch Med, Dept Pediat, CB 7220, Chapel Hill, NC 27599 USA TI - Comparative toxicity of trivalent and pentavalent inorganic and methylated arsenicals in rat and human cells AB - Biomethylation is considered a major detoxification pathway for inorganic arsenicals (iAs). According to the postulated metabolic scheme, the methylation of iAs yields methylated metabolites in which arsenic is present in both pentavalent and trivalent forms. Pentavalent mono- and dimethylated arsenicals are less acutely toxic than iAs. However, little is known about the toxicity of trivalent methylated species. In the work reported here the toxicities of iAs and trivalent and pentavalent methylated arsenicals were examined in cultured human cells derived from tissues that are considered a major site for iAs methylation (liver) or targets for carcinogenic effects associated with exposure to iAs (skin, urinary bladder, and lung). To characterize the role of methylation in the protection against toxicity of arsenicals, the capacities of cells to produce methylated metabolites were also examined. In addition to human cells, primary rat hepatocytes were used as methylating controls. Among the arsenicals examined, trivalent monomethylated species were the most cytotoxic in all cell types. Trivalent dimethylated arsenicals were at least as cytotoxic as trivalent iAs (arsenite) for most cell types. Pentavalent arsenicals were significantly less cytotoxic than their trivalent analogs. Among the cell types examined, primary rat hepatocytes exhibited the greatest methylation capacity for iAs followed by primary human hepatocytes, epidermal keratinocytes, and bronchial epithelial cells. Cells derived from human bladder did not methylate iAs. There was no apparent correlation between susceptibility of cells to arsenic toxicity and their capacity to methylate iAs. These results suggest that (1) trivalent methylated arsenicals, intermediary products of arsenic methylation, may significantly contribute to the adverse effects associated with exposure to iAs, and (2) high methylation capacity does not protect cells from the acute toxicity of trivalent arsenicals MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 225 U4 - Toxicology U5 - J;Article AV - English IS - 0340-5761 UR - ISI:000089074500001 L2 - arsenic;toxicity;methylation;cell culture;liver;skin;lung;bladder;arsenate;arsenite;methylarsonic acid;methylarsonous acid;dimethylarsinic acid;dimethylarsinous acid;IN-VITRO METHYLATION; DRINKING-WATER; ENZYMATIC METHYLATION; HUMAN HEPATOCYTES; CELLULAR UPTAKE; RABBIT LIVER; GLUTATHIONE; METABOLISM; ARSENATE; BINDING SO - Archives of Toxicology 2000 ;74(6):289-299 1936 UI - 15130 AU - Suarez-Almazor ME AU - Belseck E AU - Homik J AU - Dorgan M AU - Ramos-Remus C AD - Baylor Coll Med, Houston, TX 77030, USAUniv Alberta, Dept Publ Hlth Sci, Edmonton, AB T6G 2M7, CanadaInst Mexicano Seguro Social, Guadalajara, Jalisco, MexicoSuarez-Almazor, ME, Vet Affairs Med Ctr 152, Hlth Serv Res, 2002 Holcombe Blvd, Houston, TX 77030 USA TI - Identifying clinical trials in the medical literature with electronic databases: MEDLINE alone is not enough AB - The objective of this study was to compare the performance of MEDLINE and EMBASE for the identification of articles regarding controlled clinical trials (CCTs) published in English and related to selected topics: rheumatoid arthritis (RA), osteoporosis (OP), and low back pain (LBP). MEDLINE and EMBASE were searched for literature published in 1988 and 1994. The initial selection of papers was then reviewed to confirm that the articles were about CCTs and to assess the quality of the studies. Selected journals were also hand searched to identify CCTs not retrieved by either database. Overall, 4111 different references were reviewed (2253 for RA, 978 for OF, and 880 for LBP); 3418 (83%) of the papers were in English. EMBASE retrieved 78% more references than MEDLINE (2895 versus 1625). Overall, 1217 (30%) of the papers were retrieved by both databases. Two hundred forty-three papers were about CCTs. Two-thirds of these were retrieved by both databases, and one-third by only one. An additional 16 CCTs not retrieved by either database were identified through hand searching. Taking these into account, EMBASE retrieved 16% more CCTs than MEDLINE (220 versus 188); the EMBASE search identified 85% of the CCTs compared to 73% by MEDLINE. No significant differences were observed in the mean quality scores and sample size of the CCTs missed by MEDLINE compared to those missed by EMBASE. Our findings suggest that the use of MEDLINE alone to identify CCTs is inadequate. The use of two or more databases and hand searching of selected journals are needed to perform a comprehensive searches. (C) Elsevier Science Inc. 2000 MH - Canada MH - Mexico|Jalisco MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 35 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0197-2456 UR - ISI:000089699200005 L2 - MEDLINE;EMBASE;on-line databases;clinical trials;rheumatic diseases;RANDOMIZED CONTROLLED TRIALS; BIBLIOGRAPHIC DATABASES; BIOMEDICAL DATABASES; LITERATURE SEARCHES; PERFORMANCE; RETRIEVAL; RELEVANT; QUALITY; CARE SO - Controlled Clinical Trials 2000 ;21(5):476-487 1937 UI - 14145 AU - Suarez-Morales E AU - Dias C AD - El Col Frontera Sur, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoUniv Fed Rio de Janeiro, Inst Biol, BR-21941590 Rio De Janeiro, BrazilSuarez-Morales, E, El Col Frontera Sur, Unidad Chetumal, Kilometro 2 Carr,AP 424, Chetumal 77000, Quintana Roo, Mexico TI - Two new species of Monstrilla (Copepoda : Monstrilloida) from Brazil AB - Several specimens of monstrilloid copepods were collected in different localities of Brazil between 1993 and 1997. The taxonomic analysis of these specimens yielded the identification of two new species of Monstrilla. The first one, M. careli sp. nov. can be distinguished by a combination of several characters, including its body proportions, with a very long cephalothorax, by the particularly long terminal segment of the antennules, by the structure of its fifth legs, and by the very long dorsal seta on the caudal rami. The second species, M. brasiliensis sp. nov, can be distinguished by the peculiar features of its fifth leg, with a patch of long and stout hair-like setae along its outer margin; it has also a notched protuberance near the antennule bases. It has a notch on the anterior protuberance of the genital somite, and a ventrally swollen cephalothorax. This species, together with M. inserta Scott bears a pair of enigmatic structures which are either modified sensillae or a vestigial postantennular appendage not previously described in the Monstrilloida MH - Brazil MH - Mexico|Quintana Roo PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000167458800008 L2 - COAST SO - Journal of the Marine Biological Association of the United Kingdom 2000 ;80(6):1031-1039 1938 UI - 14889 AU - Suchomelova L AU - Rocha L AU - Kubova H AU - Haugvicova R AU - Mares P AD - Acad Sci Czech Republ, Inst Physiol, Prague, Czech RepublicInst Mexicano Psiquiatria, Mexico City, DF, Mexico TI - Changes in central benzodiazepine (BDZ) binding sites following lithium-pilocarpine status epilepticus (SE) in developing rats MH - Czech Republic MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences U5 - J;Meeting Abstract AV - English IS - 0953-816X UR - ISI:000088236600618 SO - European Journal of Neuroscience 2000 ;12():108-108 1939 UI - 16504 AU - Suffys P AU - Palomino JC AU - Leao SC AU - Espitia C AU - Cataldi A AU - Alito A AU - Velasco M AU - Robledo J AU - Fernandez J AU - Rosa PD AU - Romano MI AD - CICV, Inst Biotecnol, INTA, RA-1708 Buenos Aires, DF, ArgentinaFIOCRUZ, Dept Bioquim & Biol Mol, Lab Diagnost Doencas Infecciosas, BR-21045900 Rio De Janeiro, BrazilUniv Peruana Cayetano Heredia, Lima, PeruUniv Fed Sao Paulo, Escola Paulista Med, Dept Microbiol Imunol & Parasitol, Sao Paulo, BrazilUNAM, Inst Invest Biomed, Dept Inmunol, Mexico City, DF, MexicoInst Salud Publ Chile, Secc Micobacterias, Santiago, ChileInst Salud Publ Chile, Unidad Biol Mol, Santiago, ChileCorporac Invest Biol, Medellin, ColombiaRomano, MI, CICV, Inst Biotecnol, INTA, CC 77 Moron, RA-1708 Buenos Aires, DF, Argentina TI - Evaluation of the polymerase chain reaction for the detection of Mycobacterium tuberculosis AB - The development of nucleic acid-based technologies has improved the sensitivity, specificity and speed of detection of Mycobacterium tuberculosis in clinical samples. Both commercially available and 'in-house' polymerase chain reaction (PCR) systems are in use, and a significant number of reports compare such systems with more traditional diagnostic tools for tuberculosis. Few studies, however, have focused on the reproducibility of the results when submitting a sample batch to PCR in different laboratories, especially in developing countries. Consequently, PCR results obtained from six laboratories in six different Latin American countries for samples reconstituted with defined amounts of M. tuberculosis cells were evaluated. Each laboratory used specific conditions of sample processing, nucleic acid amplification and amplicon detection. Analysis of results allowed large differences in sensitivity and specificity to be observed. We conclude that in its present setting, inhouse PCR cannot be used as a single diagnostic tool for tuberculosis, and that special care needs to be taken upon interpretation of results by inclusion of a proper number of positive and negative controls MH - Argentina MH - Brazil MH - Chile MH - Colombia MH - Mexico|Distrito Federal MH - Peru PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 17 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000085339300015 L2 - tuberculosis;PCR;Mycobacterium tuberculosis;PCR; DIAGNOSIS; AMPLIFICATION; IDENTIFICATION; LABORATORIES; SEQUENCE; ASSAY; LEVEL SO - International Journal of Tuberculosis and Lung Disease 2000 ;4(2):179-183 1940 UI - 15183 AU - Sugiyama T AU - Chaisitsak S AU - Yamada A AU - Konagai M AU - Kudriavtsev Y AU - Godines A AU - Villegas A AU - Asomoza R AD - Tokyo Inst Technol, Dept Elect & Elect Engn, Meguro Ku, Tokyo 1528552, JapanCtr Res & Adv Studies, Dept Elect Engn, Mexico City 07000, DF, MexicoSugiyama, T, Tokyo Inst Technol, Dept Elect & Elect Engn, Meguro Ku, 2-12-1 Ohokayama, Tokyo 1528552, Japan TI - Formation of pn homojunction in Cu(InGa)Se-2 thin film solar cells by Zn doping AB - In this study, a pn homojunction was intentionally fabricated in the Cu(InGa)Se-2 (CIGS) layer by Zn doping. For Zn doping of the CIGS layer, Zn was evaporated after CIGS formation, and a potential improvement in cell performance was confirmed by this technique. Furthermore, Zn diffusion into the CIGS film was investigated by secondary ion mass spectroscopy (SIMS), A conductivity-type conversion from p-type to n-type was studied by the measurement of the cross-sectional electron beam-induced current (junction EBIC: JEBIC) and the spectral response of solar cells. A conversion efficiency of 11.5% has been achieved using the Zn-doped CIGS layer without a buffer layer and by the formation of a pn homojunction in the CIGS absorber MH - Japan MH - Mexico|Distrito Federal PB - MINATO-KU TOKYO: INTS PURE APPLIED PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-4922 UR - ISI:000089542100029 L2 - Cu(InGa)Se-2;solar cell;Zn doping;EBIC;pn homojunction;DEPOSITION; EFFICIENCY; LAYER SO - Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers 2000 ;39(8):4816-4819 1941 UI - 14613 AU - Sulentic JW AU - Marziani P AU - Zwitter T AU - Dultzin-Hacyan D AU - Calvani M AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAOsservatorio Astron Padova, I-35122 Padua, ItalyUniv Ljubljana, Dept Phys, Ljubljana 1000, SloveniaNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoSulentic, JW, Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA TI - The demise of the classical broad-line region in the luminous quasar PG 1416-129 AB - New observations of the broad-line quasar PG 1416-129 reveal a large decline in its continuum luminosity over the past 10 years. In response to the continuum change, the "classical" broad component of H beta has almost completely disappeared (a factor of 10 decrease in flux). In its place there remains a redshifted/redward asymmetric very broad emission line component. The significance of this change is multifold. (1) It confirms the existence of a distinct redshifted very broad line region (VBLR) component that persists after the demise of the broad component and that is frequently observed, along with the broad component, in radio-loud sources. (2) The smaller (decrease by a factor of 2) intensity change in the H beta very broad component supports the previously advanced idea that the VBLR is physically distinct and likely to arise in an optically thin region close to the central source. (3) The presence of a strong very broad component in the radio-quiet quasar PG 1416-129 reinforces the notion that such "population B" quasars share similar spectroscopic (and hence geometrical and kinematical) properties to radio-loud sources. (4) AGNs can show broad, very broad, or both line components simultaneously, making statistical comparisons of source profile widths difficult. (5) The interpretation, in reverberation studies, of the presence or lack of correlated response in broad-line wings will be affected by this composite BLR/VBLR structure MH - Italy MH - Mexico|Distrito Federal MH - Slovenia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166185100004 L2 - line : formation;line : profiles;quasars : emission lines;quasars : general;quasars : individual (PG 1416-129);ACTIVE GALACTIC NUCLEI; EMISSION; PROFILES; VARIABILITY SO - Astrophysical Journal 2000 ;545(1):L15-L18 1942 UI - 14616 AU - Sulentic JW AU - Marziani P AU - Dultzin-Hacyan D AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAOsservatorio Astron Padova, I-35122 Padua, ItalyNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoSulentic, JW, Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA TI - Phenomenology of broad emission lines in active galactic nuclei AB - Broad emission lines hold fundamental clues about the kinematics and structure of the central regions in AGN. In this article we review the most robust line profile properties and correlations emerging from the best data available. We identify fundamental differences between the profiles of radio-quiet and radio-loud sources as well as differences between the high- and low-ionization lines, especially in the radio-quiet majority of AGN. An Eigenvector 1 correlation space involving FWHM H beta, W(FeIIopt)/W(H beta), and the soft X-ray spectral index provides optimal discrimination between all principal AGN types (from narrow-line Seyfert 1 to radio galaxies). Both optical and radio continuum luminosities appear to be uncorrelated with the E1 parameters. We identify two populations of radio-quiet AGN: population A sources (with FWHM(H beta) less than or similar to 4000 km s(-1), generally strong pen emission and a soft X-ray excess) show almost no parameter space overlap with radio-loud sources. Population B shows optical properties largely indistinguishable from radio-loud sources, including usually weak Pen emission, FWHM(H beta) greater than or similar to 4000 km s(-1) and lack of a soft X-ray excess. There is growing evidence that a fundamental parameter underlying Eigenvector 1 may be the luminosity-to-mass ratio of the active nucleus (L/M), with source orientation playing a concomitant role MH - Italy MH - Mexico|Distrito Federal MH - USA PB - PALO ALTO: ANNUAL REVIEWS RP - NOT IN FILE U3 - TC 62 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0066-4146 UR - ISI:000166011300014 L2 - Seyfert galaxies;quasars;accretion disks;spectroscopy;emission lines;line formation;FE-II EMISSION; QUASI-STELLAR OBJECTS; X-RAY-PROPERTIES; RADIO-LOUD QUASARS; H-ALPHA EMISSION; SLIM ACCRETION DISKS; LOW-IONIZATION LINES; SPECTRAL ENERGY-DISTRIBUTIONS; HIGH-RESOLUTION SPECTROSCOPY; OPTIMALLY EMITTING CLOUDS SO - Annual Review of Astronomy and Astrophysics 2000 ;38():521-571 1943 UI - 15742 AU - Sulentic JW AU - Zwitter T AU - Marziani P AU - Dultzin-Hacyan D AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAUniv Ljubljana, Dept Phys, Ljubljana 1000, SloveniaOsservatorio Astron Padova, I-35122 Padua, ItalyUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoSulentic, JW, Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA TI - Eigenvector 1: An optimal correlation space for active galactic nuclei AB - We identify a correlation space involving optical and UV emission-line parameters as well as the soft X-ray spectral index that provides optimal discrimination between all principal classes of active galactic nuclei (AGNs). Most of the sources in our three high-quality data samples show a strong intercorrelation with narrow-line Seyfert 1 (NLSy1) galaxies and steep-spectrum radio galaxies occupying opposite extrema in the space. NLSy1 sources show a clear continuity with broader line sources, indicating that they are not a disjoint class of AGN as is sometimes suggested. We interpret the principal intercorrelation in the parameter space as being driven by the AGN luminosity-to-black hole mass ratio (L/M is proportional to the Eddington ratio). Source orientation no doubt also plays an important role, but it is not yet clear whether FWHM H beta or C IV lambda 1549 line shift is the better indicator. We tentatively identify two radio-quiet populations: an almost pure radio-quiet population A, with FWHM less than or equal to 4000, and population B, which occupies the same parameter domain as the flat-spectrum radio-loud sources. A possible interpretation sees population A/NLSy1 as lower mass/high accretion rate sources and population B/radio-loud sources as the opposite MH - Italy MH - Mexico|Distrito Federal MH - Slovenia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087963500002 L2 - galaxies : Seyfert;line : formation;line : profiles;quasars : general;EMISSION-LINE PROPERTIES; RADIO-LOUD QUASARS; X-RAY-PROPERTIES; H-ALPHA LINES; FE K-ALPHA; PICTOR-A; BROAD; GALAXY; PROFILES; SPECTRUM SO - Astrophysical Journal 2000 ;536(1):L5-L9 1944 UI - 15910 AU - Sullivan J AU - Arellano E AU - Rogers DS AD - Univ Idaho, Dept Biol Sci, Moscow, ID 83844, USABrigham Young Univ, Dept Zool, Provo, UT 84602, USABrigham Young Univ, Monte L Bean Life Sci Museum, Provo, UT 84602, USAUniv Autonoma Morelos, Ctr Educ Ambiente & Invest Sierra de Huautla, Champila Cuernavaca 62210, Morelos, MexicoSullivan, J, Univ Idaho, Dept Biol Sci, Moscow, ID 83844, USA TI - Comparative phylogeography of mesoamerican highland rodents: Concerted versus independent response to past climatic fluctuations AB - The phylogeography of Sumichrast's harvest mouse (Reithrodontomys sumichrasti) was examined through maximum-likelihood and parsimony analyses of 1,130 bp of mitochondrial Cytochrome b sequence data From 43 individuals. The phylogeography of this Middle American highland forest-dwelling species was compared to that previously published for the codistributed Aztec deer mouse complex (Peromyscus aztecus/Peromyscus hylocetes complex) in order to test competing hypotheses of concerted versus independent responses of codistributed forms to past climatic fluctuations. Qualitatively, there were strong similarities in the phylogeographic patterns of the two groups, yet there were also areas of incongruence. Likelihood-ratio tests (Kishino-Hasegawa-Templeton and parametric bootstrap tests) indicated that this incongruence is significant and cannot be attributed simply to uncertainty in phylogenetic estimation, thereby falsifying the concerted-response hypothesis. Conversely, tree-reconciliation analysis of the area relationships inferred for each group separately indicated that there has been a significant history of covicariance between the two groups, falsifying the independent-response hypothesis. It appears that codistributed taxa in the geologically complex highlands of Mesoamerica share more common biogeographical history than can be accounted for by the independent-response hypothesis yet have not responded to past climatic fluctuations in the lock-step fashion predicted by the concerted-response hypothesis MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 50 U4 - Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0003-0147 UR - ISI:000087485800004 L2 - comparative phylogeography;Middle American highlands;Peromyscus;parametric bootstrap;Reithrodontomys sumichrasti;maximum likelihood;MAXIMUM-LIKELIHOOD; CONTINENTAL BIOTAS; DNA; BIOGEOGRAPHY; PHYLOGENIES; EVOLUTION; SEQUENCE; HISTORY; MODELS; CONSERVATION SO - American Naturalist 2000 ;155(6):755-768 1945 UI - 15395 AU - Sun XC AU - Gutierrez A AU - Yacaman MJ AU - Dong XL AU - Jin S AD - Inst Nacl Invest Nucl, Ocoyoacac, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoShenyang Polytech Univ, Lab Ultrafine Particles, Shenyang 110023, Peoples R ChinaSun, XC, Inst Nacl Invest Nucl, Km 36-5,Carr Mexico Toluca,CP 52045, Ocoyoacac, Mexico TI - Investigations on magnetic properties and structure for carbon encapsulated nanoparticles of Fe, Co, Ni AB - In the present work, experiments aim at the encapsulation of foreign materials within hollow graphitic cage have been carried out for iron group metals (Fe, Co, Ni) using a modified are-discharge (carbon arc) reactor. HRTEM (high resolution transmission electron miscroscope), and XRD (X-ray diffractometer) studies, for three carbon encapsulated materials, showing nanoparticles of both a metallic phase (alpha-Fe, gamma-Fe; hcp-Co, fcc-Co; fcc-Ni) and also a carbide phase (M3C, M = Fe, Co, Ni) are encapsulated in graphitic carbon. The magnetic measurement for the three as-made nanoparticles, indicating that the values of saturation magnetic moment of three nanoparticle are 37.6, 55.5 and 15.7% of the bulk ferromagnetic elements counterparts, respectively. The different comparison values (M-r/M-s) of remanent magnetization (M-r) and saturation magnetization (M-s) suggest, the encapsulated Fe and Co nanoparticles are shown to be ferromagnetic with a ratio of remnant to saturation magnetization M-r/M-s similar to 0.3; whereas, the encapsulated Ni nanoparticles exhibits superparamagnetic behavior at room temperature. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Peoples R China PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 25 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000088914700028 L2 - carbon encapsulated nanoparticles;superparamagnetic;magnetic properities;NANOCAPSULES; CARBIDES; METALS SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2000 ;286(1):157-160 1946 UI - 15486 AU - Sun XC AU - Cabral-Prieto A AU - Yacaman MJ AU - Reyes-Gasga J AU - Hernandez-Reyes R AU - Morales A AU - Sun WS AD - Natl Inst Nucl Res, ININ, Ocoyoacac 52045, Mexico, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoAcad Sinica, Inst Met Res, State Key Lab RSA, Shenyang 110015, Peoples R ChinaSun, XC, Natl Inst Nucl Res, ININ, Km 36-5,Carr Mexico Toluca, Ocoyoacac 52045, Mexico, Mexico TI - Nanocrystallization behavior and magnetic properties of amorphous Fe78Si9B13 ribbons AB - The amorphous state of ferromagnetic Fe78Si9B13 ribbons and its nanocrystallization were investigated by in situ transmission electron microscope (TEM), X-ray diffraction (XRD), Mossbauer spectroscopy (MS), differential scanning calorimeters (DSC) and magnetic moment measurements. The Mossbauer spectrum exhibited an essentially symmetric hyperfine held pattern of 259 kOe in as-quenched amorphous state at room temperature. The Curie and crystallization temperature were determined to be T-C = 708 K and T-x = 803 K, respectively. The T-x value was in good agreement with DSC measurement results. The occupied fraction of the nanocrystalline phases of alpha-Fe(Si) and Fe2B at in situ optimum annealing temperature was about 57% and 43%, respectively. It is notable that the magnetization of the amorphous phase decreases more rapidly with increasing temperature than those of nanocrystalline ferromagnetism, suggesting the presence of the distribution of exchange interaction in the amorphous phase or high metalloid contents. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000088686000025 L2 - nanocrystallization;magnetic properties;Fe78Si9B13 ribbons;CRYSTALLIZATION; FE78B13SI9; ALLOY SO - Physica B 2000 ;291(1-2):173-179 1947 UI - 15812 AU - Sun Y AU - Hara K AU - Sheikh JA AU - Hirsch JG AU - Velazquez V AU - Guidry M AD - Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAXuzhou Normal Univ, Dept Phys, Xuzhou 221009, Jiangsu, Peoples R ChinaTech Univ Munich, Dept Phys, D-85747 Garching, GermanyTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoSun, Y, Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USA TI - Multiphonon gamma-vibrational bands and the triaxial projected shell model AB - We present a fully quantum-mechanical, microscopic, unified treatment of ground-state band and multiphonon gamma-vibrational bands using shell model diagonalization with the triaxial projected shell model. The results, which agree very well with data on the g- and gamma-band spectra in Er156-170, as well as with recently measured 4(+) two-phonon gamma-bandhead energies in Er-166 and Er-168, are discussed in terms of the K mixing. Multiphonon gamma-excitation energies are predicted MH - Germany MH - India MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000087575000040 L2 - COLLECTIVE-COORDINATE METHOD; MICROSCOPIC DESCRIPTION; EXCITATIONS; NUCLEI; ER-168; STATES SO - Physical Review C 2000 ;6106(6): 1948 UI - 15825 AU - Suzuki Y AU - Calderon HA AU - Kondo N AU - Ohji T AD - Natl Ind Res Inst Nagoya, Nagoya, Aichi 4628510, JapanInst Politecn Nacl, Mexico City 07338, DF, MexicoSuzuki, Y, Natl Ind Res Inst Nagoya, Nagoya, Aichi 4628510, Japan TI - In situ formation of hexaferrite magnets within a 3Y-TZP matrix: La2O3-ZnO-Fe2O3 and BaO-Fe2O3 systems AB - The in situ formation of magnetoplumbite-type (M-type) hexa-ferrites within a 3Y-TZP matrix was examined for the La2O3-ZnO-Fe2O3, and BaO-Fe2O3 systems. The formation of barium hexaferrite (Ba-M) was rapid enough at a temperature of 1300 degrees C for 2 h to result in a uniform dispersion of fine Ba-M particles in a tetragonal zirconia polycrystal (TZP) matrix. However, the formation of lanthanum-substituted hexaferrite (La-M) was rather sluggish, despite the existence of a charge-compensating divalent oxide. The 3Y-TZP/20-wt%-BaFe12O19 in situ composite possessed good magnetic properties, as well as moderately good mechanical properties MH - Japan MH - Mexico|Distrito Federal PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000087655000004 L2 - HEXAGONAL FERRITES; CRYSTAL-STRUCTURE; ANISOTROPY; LAFE12O19 SO - Journal of the American Ceramic Society 2000 ;83(6):1346-1350 1949 UI - 16512 AU - Szentgyorgyi AH AU - Raymond JC AU - Hester JJ AU - Curiel S AD - Smithsonian Astrophys Observ, Cambridge, MA 02138, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSzentgyorgyi, AH, Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA TI - [Ne v] imaging of the Cygnus Loop AB - We present continuum-subtracted images of a 20' x 20' region of the eastern Cygnus Loop (NGC 6995) in the 3425 Angstrom forbidden line of Ne v. The images reveal bright linear filaments which are associated with, but not positionally coincident with, bright features seen in H alpha, [O III], and other narrowband images. In some areas, the [Ne v] filaments define the edge of X-ray-emitting regions. The filaments exhibit a peak surface brightness of 1.2 x 10(-4) photons cm(-2) s(-1) arcsec(-2) at the top of the atmosphere in images with typical detection limits of similar to 10(-5) photons cm(-2) s(-1) arcsec(-2). We present arguments that these structures are produced by radiative shock waves and discuss implications for the shock velocities and the three-dimensional structure of this section of the Cygnus Loop. We place limits on the importance of thermal conduction-driven evaporation as a contribution to the mass of X-ray-emitting gas. Lack of evidence of [Ne v] emission resulting from thermal evaporation may have significance for supernova remnants and interstellar medium models that rely heavily on the importance of thermal evaporation MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000085334700029 L2 - ISM : individual (Cygnus Loop);ISM : structure;shock waves;ultraviolet : ISM;X-rays : ISM;HOPKINS-ULTRAVIOLET-TELESCOPE; SHOCK-WAVES; X-RAY; SUPERNOVA REMNANT; PLANETARY-NEBULAE; INTERSTELLAR-MEDIUM; RADIATIVE SHOCKS; FAR-ULTRAVIOLET; EMISSION; DYNAMICS SO - Astrophysical Journal 2000 ;529(1):279-292 1950 UI - 16305 AU - Tainter FH AU - O'Brien JG AU - Hernandez A AU - Orozco F AU - Rebolledo O AD - Clemson Univ, Dept Forest Resources, Clemson, SC 29634, USAUS Forest Serv, USDA, St Paul, MN 55108, USASecretaria Medio Ambiente Recursos Nat & Pesca, Coyoacan 04110, MexicoSecretaria Medio Ambiente Recursos Nat & Pesca, Colima, MexicoUniv Colima, Tecoman, Colima, MexicoTainter, FH, Clemson Univ, Dept Forest Resources, Clemson, SC 29634, USA TI - Phytophthora cinnamomi as a cause of oak mortality in the state of Colima, Mexico AB - This research identifies the root pathogen Phytophthora cinnamomi as the primary cause of mortality in a 300-ha disease center of mixed oak trees in a native forest in southern Mexico. In increasing order of apparent field resistance to the disease, the major oak species are Quercus glaucoides, Q. peduncularis, and Q. salicifolia. P. cinnamomi was isolated from soil in the affected area from symptomatic trees and was successfully used to perform Koch's postulates on these three oak species. Artificial and natural infections produced vertically elongated discolorations in the outer xylem and distinctive phloem canker lesions with a sharp demarcation line between healthy and affected tissues. In Q, glaucoides there is little evidence that this oak species is able to resist the girdling effects of the phloem lesions, but in Q. peduncularis, and especially in Q. salicifolia, increased production of callus tissue around the phloem canker lesions suggests an active resistance mechanism that may allow these infected trees to survive somewhat longer. This particular incident is unlike other recent reports in other parts of the world of oak mortality caused by P cinnamomi because the initial appearance of disease in this area is known (just prior to 1987), and it has subsequently expanded to the present area of 300 ha (in 1999) as a distinctive infection locus with periodically advancing infection fronts. This incident is also another dramatic illustration of the potential environmental damage that can result when P. cinnamomi is introduced into a simple forest ecosystem where the major overstory trees are susceptible to infection and are killed MH - Mexico|Colima MH - Mexico|Distrito Federal MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000085994700002 L2 - introduced pathogen;root disease SO - Plant Disease 2000 ;84(4):394-398 1951 UI - 16670 AU - Talanquer V AU - Oxtoby DW AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Chicago, James Franck Inst, Chicago, IL 60637, USATalanquer, V, Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Gas-liquid nucleation in associating fluids AB - The density functional approach to nucleation is extended to the study of the condensation of associating fluids. We use Wertheim theory for associating liquids in a system of spherical interacting molecules with single association sites. Our calculations show that classical nucleation theory largely underestimates the height of the nucleation barrier in this kind of system, but most of that error can be corrected through the classical model of Katz, Saltsburg, and Reiss for nucleation in associated vapors. (C) 2000 American Institute of Physics. [S0021-9606(00)51402-0] MH - Mexico|Distrito Federal MH - USA PB - WOODBURY: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 17 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000084507000041 L2 - HOMOGENEOUS NUCLEATION; PHASE-EQUILIBRIA; SIMULATION; VAPOR; SITES; RATES SO - Journal of Chemical Physics 2000 ;112(2):851-856 1952 UI - 16206 AU - Talley TS AU - Dayton PK AU - Ibarra-Obando SE AD - Univ Calif San Diego, Scripps Inst Oceanog, Marine Life Res Grp, La Jolla, CA 92093, USACtr Invest Cientif & Educ Super Ensenada, Ensenada, Baja California, MexicoTalley, TS, Univ Calif San Diego, Scripps Inst Oceanog, Marine Life Res Grp, La Jolla, CA 92093 USA TI - Tidal flat macrofaunal communities and their associated environments in estuaries of southern California and northern Baja California, Mexico AB - Several tidal flats in both Estero de Punta Banda and Bahia de San Quintin, Baja California, and one in Mission Bay, southern California, were sampled for macrofaunal properties (taxonomic composition, density, species richness, and functional groups for animals greater than or equal to 0.3 mm) and associated environmental variables (sediment properties, salinity, plant belowground biomass, and cover of Zostera marina) in order to establish a benchmark data set for these areas. The grouping of macrofauna into higher taxonomic or functional groups for these comparisons reduced variability and revealed stronger relationships. Each estuary had a fairly distinct macrofaunal assemblage, with that of Estero de Punta Banda being different from Bahia de San Quintin and Mission Bay primarily due to dominance by a capitellid polychaete, lower proportions of surface deposit feeders, and higher proportions of fauna with a planktonic stage. The flats in Mission Bq and Bahia de San Quintin were dominated by peracarid crustaceans, oligochaetes and polychaetes and had higher proportions of direct developers and macrofauna with mobile adult stages than did Estero de Punta Bands. There was an overlap of the environmental characteristics among estuaries, with more variability of sediment and vegetation properties within than among estuaries. Within Bahia. de San Quintin, there was an oceanic to back-bay distribution gradient of macrofauna that was similar to that found in estuaries in wetter climates, despite the lack of a salinity gradient in San Quintin. A decoupling of the benthos and the assumed anthropogenic stresses was observed with the degraded site, Mission Bay, being most similar to the relatively pristine Bahia de San Quintin. Selection of reference sites and sampling variables should be made cautiously because effects of disturbance factors on the benthos may be site-dependent, scale-dependent, or negligible MH - USA MH - Mexico|Baja California PB - LAWRENCE: ESTUARINE RES FEDERATION RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0160-8347 UR - ISI:000086459100009 L2 - MUSCULISTA-SENHOUSIA; EXOTIC MUSSEL; SEAGRASS BEDS; SALT-MARSH; DISPERSAL; PATTERNS; SIZE; BAY; MACROBENTHOS; ASSEMBLAGE SO - Estuaries 2000 ;23(1):97-114 1953 UI - 14574 AU - Tamazian VS AU - Docobo JA AU - Melikian ND AU - Baba N AU - Chavushyan VH AD - Astron Observ Ramon Maria Aller, Santiago De Compostela 15706, SpainByurakan Astrophys Observ, Aragatsotn 378433, ArmeniaHokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, JapanInst Nacl Astrofis Opt & Elect, Puebla 72000, Pue, MexicoTamazian, VS, Astron Observ Ramon Maria Aller, POB 197, Santiago De Compostela 15706, Spain TI - Spectral, photometric and speckle observations of visual binary WDS 00550+2338 AB - New spectral classification, photometric and speckle measurements of visual binary star WDS 00550+2338 are presented. The composite spectrum confirms it belongs to the late type subgiants (K0 IV) and is located above the main sequence. Speckle spectroscopy data allowed us to classify A and B components separately as G8 IV and K3 IV. A brightness increase of 0.(m)56 and 0.(m)28 in B and V colors, respectively, has been detected during 27 hours of BV photometric observations in the course of two observing runs in 1997 and 1999. New astrometric data are presented confirming the good quality of the last published orbit for this star. On the basis of its orbital data and parallax the total mass of the system, close to 2M., is derived. It is suggested that registered Variability looks similar to flarelike events usually observed in young pre-main sequence stars, while further photometric observations are needed to confirm the character of variation. No significant polarization signal has been detected for this star MH - Armenia MH - Japan MH - Mexico|Puebla MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000166174900023 L2 - stars : binaries : visual;stars : individual : WDS 00550+2338;stars : variables : general;T-TAURI STARS; MICROMETER MEASUREMENTS; SPANISH OBSERVATORIES; STELLAR SPECTRA; YOUNG STARS; CALAR-ALTO; SPECTROSCOPY; MULTIPLICITY; RESOLUTION; COMPONENTS SO - Astronomy and Astrophysics 2000 ;363(3):1019-1025 1954 UI - 15504 AU - Tamez-Guerra P AU - McGuire MR AU - Behle RW AU - Hamm JJ AU - Sumner HR AU - Shasha BS AD - ARS, Biol Agents Res Unit, USDA, NCAUR, Peoria, IL 61604, USAUANL, FCB, Dept Microbiol & Inmunol, San Nicolas De Los Garza 66450, NL, MexicoARS, REE, IBPMRL, USDA, Tifton, GA, USAMcGuire, MR, ARS, Biol Agents Res Unit, USDA, NCAUR, 1815 N Univ St, Peoria, IL 61604 USA TI - Sunlight persistence and rainfastness of spray-dried formulations of Baculovirus isolated from Anagrapha falcifera (Lepidoptera : Noctuidae) AB - Nuclear polyhedrosis viruses such as the one isolated from the celery looper, Anagrapha falcifera (Kirby) (AfMNPV), have the potential to be successful bioinsecticides if improved formulations can prevent rapid loss of insecticidal activity from environmental conditions such as sunlight and rainfall. We tested 16 spray-dried formulations of AfMNPV to determine the effect of different ingredients (e.g., lignin, corn flour, and so on) on insecticidal activity after simulated rain and simulated sunlight (at Peoria, IL) and natural sunlight exposures (at Tifton, GA). The most effective formulation contained pregelatinized corn flour and potassium lignate, which retained more than half of its original activity after 5 cm of simulated rain, and almost full activity after 8 h of simulated sunlight. In Georgia, formulations made with and without lignin were compared for persistence of insecticidal activity when exposed to natural sunlight. In addition, the effect of fluorescent brighteners as formulation components and spray tank additives was tested. Results showed that the formulations with lignin had more insecticidal activity remaining after sunlight exposure than formulations without lignin. The inclusion of brighteners in the formulation did not improve initial activity or virus persistence. However, a 1% tank mix significantly enhanced activity and improved persistence. Scanning electron micrographs revealed discreet particles, and transmission electron micrographs showed virus embedded within microgranules. Results demonstrated that formulations made with natural ingredients could improve persistence of virus-based biopesticides MH - USA MH - Mexico|Nuevo Leon PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 18 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000088598900005 L2 - Anagrapha falcifera baculovirus;formulations;spray drying;nuclear polyhedrosis virus;sunlight stability;rainfastness;NUCLEAR POLYHEDROSIS-VIRUS; GYPSY-MOTH LEPIDOPTERA; LYMANTRIIDAE BACULOVIRUS; BACILLUS-THURINGIENSIS; HELIOTHIS; PROTECTANTS; STABILITY SO - Journal of Economic Entomology 2000 ;93(2):210-218 1955 UI - 15505 AU - Tamez-Guerra P AU - McGuire MR AU - Behle RW AU - Shasha BS AU - Wong LJG AD - ARS, Bioact AGents Res Unit, USDA, NCAUR, Peoria, IL 61604, USAUANL, Fac Ciencias Biol, Dept Microbiol & Inmunol, Sn Nicolas De Los Garza 66450, NL, MexicoMcGuire, MR, ARS, Bioact AGents Res Unit, USDA, NCAUR, 1815 N Univ St, Peoria, IL 61604 USA TI - Assessment of microencapsulated formulations for improved residual activity of Bacillus thuringiensis AB - Bacillus thuringiensis Berliner is a highly efficacious bioinsecticide used to control lepidopteran pests in the field. Unfortunately, it has limited residual activity on plants because sunlight inactivates spores and crystals and they can be washed off by rain. To minimize loss of activity, formulations must contain UV protectants, stickers, or both. We tested approximate to 80 formulations and determined optimal combinations of ingredients and spray drying conditions for improving B. thuringiensis residual activity after simulated rain and simulated sunlight. B. thuringiensis stability, after simulated sunlight (xenon light/8 h) and rain (5 cm/50 min), was improved using formulations based on lignin, corn flours, or both, with up to 20% of the active ingredient, when compared with technical powder or Dipel 2x in laboratory assays. Two formulations, made with corn flours or lignin + pregelatinized corn flour (PCF), killed 51.6 and 75.3% of Ostrinia nubilalis (Hubner) neonates after rain, respectively, versus 27% for technical powder. When the insecticidal activity was tested after simulated sunlight, corn flour-based formulations killed 78.5% of test larvae, and the lignin + PCF formulation killed 70.4%, in contrast to technical powder which caused an average of 29% mortality. Formulations made with Dipel 2x rather than technical powder, caused 62.5% mortality (corn flour-based formulations), and 72.3% mortality (lignin + PCF), versus 53.4% for Dipel 2x after rain. When tested after simulated sunlight, formulations killed 95% of the larvae (average of both formulations) versus 82% for Dipel 2x. In a field test, formulations were applied to cabbage and insecticidal activity was determined against Trichoplusia ni (Hubner) neonates exposed to treated leaves. Insecticidal activity of the corn flour-based formulations was comparable to DiDel 2x for 4 d after treatment, but was significantly better than Dipel 2x 7 d after application. A lignin and PCF-based formulation showed significantly higher residual activity than Dipel 2x, 4 and 7 d after application MH - USA MH - Mexico|Nuevo Leon PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 21 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000088598900006 L2 - Bacillus thuringiensis;lepidoptera;biopesticide;spray dried formulations;lignin;pregelatinized corn flour;SUNLIGHT; CRYSTALS SO - Journal of Economic Entomology 2000 ;93(2):219-225 1956 UI - 15776 AU - Tang Y AU - Tomizuka M AU - Guerrero G AU - Montemayor G AD - Natl Univ Mexico, DEPFI UNAM, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USATang, Y, Natl Univ Mexico, DEPFI UNAM, Mexico City 04510, DF, Mexico TI - Decentralized robust control of mechanical systems AB - For mechanical systems described by Euler-Lagrange equations and involving high-order interconnections, this paper proposes a decentralized control, which guarantees the uniform ultimate stability when the control objective is tracking a smooth desired trajectory. The controller design is based on some physical properties of such systems and Lyapunov design methodology [3]. The application of the proposed controller to robot manipulators is presented, and experiment results are included to illustrate the performance of the proposed control algorithm MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000087820100023 L2 - decentralized control;large scale systems;mechanical systems;robot manipulators;robust control;ADAPTIVE-CONTROL; INTERCONNECTED SYSTEMS; NONLINEAR-SYSTEMS; DYNAMIC-SYSTEMS; DESIGN; STABILIZATION; MANIPULATORS; STABILITY SO - Ieee Transactions on Automatic Control 2000 ;45(4):771-776 1957 UI - 16154 AU - Tang YY AU - Schon EA AU - Wilichowski E AU - Vazquez-Memije ME AU - Davidson E AU - King MP AD - Columbia Univ, Dept Genet & Dev, New York, NY 10032, USAColumbia Univ, Dept Neurol, New York, NY 10032, USAUniv Gottingen, Kinderklin, Abt Padiatri Neuropadiatrie, D-37075 Gottingen, GermanyHosp Pediatria, Ctr Med Nacl, Unidad Invest Med Genet Humana, Mexico City, DF, MexicoThomas Jefferson Univ, Dept Biochem & Mol Pharmacol, Philadelphia, PA 19107, USATang, YY, Columbia Univ, Dept Genet & Dev, New York, NY 10032, USA TI - Rearrangements of human mitochondrial DNA (mtDNA): New insights into the regulation of mtDNA copy number and gene expression AB - Mitochondria from patients with Kearns-Sayre syndrome harboring large-scale rearrangements of human mitochondrial DNA (mtDNA; both partial deletions and a partial duplication) were introduced into human cells lacking endogenous mtDNA. Cytoplasmic hybrids containing 100% wild-type mtDNA, 100% mtDNA with partial duplications, and 100% mtDNA with partial deletions were isolated and characterized. The cell Lines with 100% deleted mtDNAs exhibited a complete impairment of respiratory chain function and oxidative phosphorylation. Ln contrast, there were no detectable respiratory chain or protein synthesis defects in the cell lines with 100% duplicated mtDNAs. Unexpectedly, the mass of mtDNA was identical in all cell lines, despite the fact that different Lines contained mtDNAs of vastly different sizes and with different numbers of replication origins, suggesting that mtDNA copy number may be regulated by tightly controlled mitochondrial dNTP pools. In addition, quantitation of mtDNA-encoded RNAs and polypeptides in these lines provided evidence that mtDNA gene copy number affects gene expression, which, in turn, is regulated at both the post-transcriptional and translational levels MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 58 U4 - Cell Biology U5 - J;Article AV - English IS - 1059-1524 UR - ISI:000086508200026 L2 - KEARNS-SAYRE-SYNDROME; DEFICIENT MUSCLE-FIBERS; TRANSCRIPTION FACTOR-A; SACCHAROMYCES-CEREVISIAE; HELA-CELLS; DIABETES-MELLITUS; PROTEIN-SYNTHESIS; WILD-TYPE; DELETIONS; MYOPATHY SO - Molecular Biology of the Cell 2000 ;11(4):1471-1485 1958 UI - 16514 AU - Tanser PH AU - Campbell LM AU - Carranza J AU - Karrash J AU - Toutouzas P AU - Watts R AD - McMaster Univ, St Josephs Hosp, Hamilton, ON L8N 4A6, CanadaSouthbank Surg, Glasgow, Lanark, ScotlandHosp Gen Dr Miguel Silva, Morelia, Michoacan, MexicoPeninsula Med Ctr, Kippa Ring, AustraliaHippokratio Gen Hosp, Athens, GreeceInvestigator Clin, Port Lincoln, SA, AustraliaTanser, PH, McMaster Univ, St Josephs Hosp, Hamilton, ON L8N 4A6, Canada TI - Candesartan cilexetil is not associated with cough in hypertensive patients with enalapril-induced cough AB - The aim of this study was to evaluate the occurrence of dry cough during treatment with candesartan cilexetil, enalapril, or placebo in patients with hypertension and a history of angiotensin converting enzyme (ACE)-inhibitor-related cough. Patients with confirmed cough during an enalapril (10 mg) challenge period, followed by no cough during a placebo dechallenge period were randomized to 8 weeks of double-blind treatment with candesartan cilexetil (8 mg) (n = 62), enalapril (10 mg) (n = 66), or placebo (n = 26). Incidence and severity of dry cough was evaluated by the symptom assessment questionnaire, frequency of dry cough by a visual analog scale, and the possible impact on quality of life by the minor symptom evaluation (MSE) profile. The percentage of patients with cough was significantly lower with candesartan cilexetil (35.5%) than with enalapril (68.2%, P < .001), and did not differ between candesartan cilexetil and placebo (26.9%, P > .20). Patients coughed less frequently and with less severe cough with candesartan cilexetil than with enalapril, and similarly with candesartan cilexetil and placebo. Changes in the MSE profile were minor, although candesartan cilexetil had better scores for contentment than placebo (P = .03), and also tended to be associated with better sleep than enalapril (P = .08). In hypertensive patients with ACE-inhibitor-induced cough, the incidence, frequency, and severity of dry cough was significantly lower with candesartan cilexetil than with enalapril, and no different from that found with placebo. (C) 2000 American Journal of Hypertension, Ltd MH - Australia MH - Canada MH - Greece MH - Mexico|Michoacan MH - United Kingdom PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0895-7061 UR - ISI:000085427100014 L2 - cough;quality of life;hypertension;candesartan cilexetil;enalapril;placebo;ANGIOTENSIN; RECEPTOR SO - American Journal of Hypertension 2000 ;13(2):214-218 1959 UI - 16115 AU - Taoutaou D AU - Castro-Linares R AD - Inst Politecn Nacl, CINVESTAV, Dept Elect Engn, Mexico City 07000, DF, MexicoUniv Nantes, Ecole Cent Nantes, Inst Rech Cybernet Nantes IRCyN, UMR 6597, F-44321 Nantes 03, FranceCastro-Linares, R, Inst Politecn Nacl, CINVESTAV, Dept Elect Engn, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - A controller-observer scheme for induction motors based on passivity feedback equivalence and sliding modes AB - In this paper, a controller-observer scheme, based on passivity feedback equivalence and the sliding mode technique, is designed to achieve rotor velocity and rotor flux norm tracking for the model of an induction motor. The passivity feedback equivalence control law design is based on a passive decomposition property of induction motors recently proposed in the literature and a sliding mode technique that allows to achieve the control objective, even in the presence of bounded parametric uncertainties. An observer is included in the control design to estimate the magnetic fluxes. A complete study of the passivity and stability properties of the resultant closed-loop system is also made. Copyright (C) 2000 John Wiley & Sons, Ltd MH - France MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0890-6327 UR - ISI:000086686900015 L2 - motor control;passivity feedback equivalence;stabilization;sliding modes;non-linear estimation;NONLINEAR-SYSTEMS; GLOBAL STABILIZATION; ADAPTIVE-CONTROL; ROBUST-CONTROL; DRIVES; MACHINES; DESIGN SO - International Journal of Adaptive Control and Signal Processing 2000 ;14(2-3):355-376 1960 UI - 16103 AU - Tapia-Mercado J AU - Khomenko AV AU - Cortes-Martinez R AU - Garcia-Zarate MA AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoKhomenko, AV, CICESE, Dept Opt, POB 434944, San Diego, CA 92143, USA TI - High accurate fiber sensor with two-LED light source AB - We describe a fiber-optic temperature sensor based on a birefringent fiber Sagnac interferometer with a light source that consists of two LEDs of different wavelength, lambda(1) and lambda(2). The sensor shows the temperature sensing and the complete independence on the light polarization that allows using unpolarized light and low-cost fiber leads. Sensor accuracy is enhanced and corresponds to a broad-spectrum light source of the lambda(1) - lambda(2) spectral range. We present the experimental results of temperature measurements with the light sources of different spectral widths. It has been shown that the measurement uncertainty is inversely proportional to the light source spectral bandwidth and an accuracy of 4 x 10(-3 degrees)C was reached experimentally. (C) 2000 Published by Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000086577200026 L2 - fiber-optics sensors;white light interferometry;Sagnac interferometer;birefringent fiber;TEMPERATURE SENSOR; INTERFEROMETER; LOOP SO - Optics Communications 2000 ;177(1-6):219-223 1961 UI - 16643 AU - Taran YA AU - Bernard A AU - Gavilanes JC AU - Africano F AD - Free Univ Brussels, B-1050 Brussels, BelgiumUniv Nacl Autonoma Mexico, Inst Geophys, Mexico City 04510, DF, MexicoUniv Colima, Colima Volcano Observ, Colima, MexicoBernard, A, Free Univ Brussels, 50 Ave Roosevelt, B-1050 Brussels, Belgium TI - Native gold in mineral precipitates from high-temperature volcanic gases of Colima volcano, Mexico AB - Trigonal and pentagonal shaped plates and prism, and octahedra of Au crystals 3-40 mu m in dimension were found on the inner wall of a silica tube inserted into a 800 degrees C fumarolic vent Of Colima volcano, Mexico. Gold precipitates from the high-temperature and highly oxidized volcanic vapor (a mixture of magmatic gas with more than 90% of air) cover a narrow temperature range of 550-600 degrees C, and occur in association with V-rich Na-K- sulfates. The Au concentration in the volcanic gas condensate is between 0.1 and 0.5 mu g/kg. Using thermodynamic data for Au(c), Au(g), AuH(g) and AuS(g), open- and closed-system cooling of a simplified volcanic gas has been modeled with the following characteristics of volcanic gas + air mixture: P = 1 bar, f(SO2) = 0.01 bar; f(SO2) fixed by Fe2O3-Fe3O4 or Cu2O-CuO pairs for open-system cooling, and f(SO2) = 0.1 bar for closed-system cooling. Volcanic vapor released from the shallow magma body transports Au as AuH(g) and AuS(g). According to calculations, after mixing with air, AuS(g) and AuH(g) oxidize to Au(g), and the temperature of the Au deposition depends only on the initial total concentration of Au species in the vapor. The temperature range of 550-600 degrees C for Au precipitation at a high f(SO2) corresponds to a very low initial Au concentration, about ng/kg in the volcanic gas condensate. This is at least two orders of magnitude lower than the observed Au content in the Colima gas, indicating the presence of other volatile gold species, e.g. AuClx, Au(OH)(x) etc., or Au precipitation under non-equilibrium conditions from a volcanic gas + air mixture with coexisting free H-2 and O-2 (C) 1999 Elsevier Science Ltd. All rights reserved MH - Belgium MH - Mexico|Colima MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0883-2927 UR - ISI:000084820300006 L2 - MOUNT ST-HELENS; FUMAROLES; EMISSIONS SO - Applied Geochemistry 2000 ;15(3):337-346 1962 UI - 16271 AU - Tarazon-Herrera MA AU - Huber JT AU - Santos JEP AU - Nussio LG AD - Univ Arizona, Dept Anim Sci, Tucson, AZ 85721, USAHuber, JT, Univ Sonora, Ave 16 Septiembre S-N, Santan Ana 84600, Sonora, Mexico TI - Effects of bovine somatotropin on milk yield and composition in Holstein cows in advanced lactation fed low- or high-energy diets AB - The objective of this study was to evaluate the response of Holstein cows to bovine somatotropin (bST) during advanced lactation and its relationship to energy intake. Twenty-four lactating Holstein cows averaging 21 kg of milk/d, and 292 d in milk were assigned to one of three treatment groups in a randomized block design. Blocks were based on the 14 d of pretreatment milk production, and treatment groups were balanced for days in milk. Treatment 1 was a low-energy diet (1.49 Mcal/kg of dry matter) without bST injection; treatment 2 was the low-energy diet plus injection of 500 mg of bST every 14 d; and treatment 3 was a high-energy diet (1.71 Mcal/kg of dry matter) with bST injections as in treatment 2. Treatment was divided into two periods (1 to 49 and 50 to 98 d) to determine if response to bST and energy changed with time on treatment. Results showed that bST significantly (P < 0.05) increased milk, fat-corrected milk, and fat and protein yields; and feed efficiency (fat-corrected milk per dry matter intake) for both periods. Milk yield responses to bST were greater for cows fed the low- than the high-energy diet in both periods. These data show that bST injections for cows in advanced lactation increased performance, but excessive energy diminished the bST response MH - Mexico|Sonora MH - USA PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000086121200009 L2 - bovine somatotropin;advanced lactation;energy level;DAIRY-COWS; CONSECUTIVE LACTATIONS; PERFORMANCE; SOMETRIBOVE; RESPONSES; PROTEIN; SYSTEM SO - Journal of Dairy Science 2000 ;83(3):430-434 1963 UI - 15023 AU - Tate MC AU - Johnson SE AD - Macquarie Univ, Dept Earth & Planetary Sci, N Ryde, NSW 2109, AustraliaCICESE, Ensenada, Baja California, MexicoTate, MC, Univ Newcastle, Dept Geol, Callaghan, NSW 2308, Australia TI - Subvolcanic and deep-crustal tonalite genesis beneath the Mexican peninsular ranges AB - Cretaceous (115-103 Ma) tonalites throughout the western Peninsular Ranges Batholith of Baja California can be explained as hybrids between andesitic fractionates (similar to 65%) and dehydration melts of amphibolite (similar to 35%). Mixing occurred between these two magmas at shallow (<0.23 GPa) crustal levels, where heterogeneous tonalite-trondhjemite with low Sr-Y ratios (<3) formed in ring complexes. Pluton-scale hybridization between adakitic (Sr/Y 92-114; La/Lu-CN 12-16) end members also occurred at 0.7-1.0 GPa depths in the underlying basement during a tectonic collision event 6-11 m.yr. later. Voluminous tonalite genesis throughout northwestern Mexico involved hybridization between dual intermediate magmas interacting in both the shallow and deep crust MH - Australia MH - Mexico|Baja California PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Geology U5 - J;Article AV - English IS - 0022-1376 UR - ISI:000090106800006 L2 - ZARZA INTRUSIVE COMPLEX; CALIFORNIA; GENERATION; AMPHIBOLITES; TEMPERATURE; THICKNESS; BATHOLITH; MAGMAS; GROWTH SO - Journal of Geology 2000 ;108(6):721-728 1964 UI - 14485 AU - Tavera FJ AU - Escudero R AU - Uribe A AU - Finch JA AD - Univ Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoMcGill Univ, Dept Min & Met Engn, Montreal, PQ, CanadaTavera, FJ, Univ Michoacana, Inst Invest Met, Ciudad Univ Edif U, Morelia 58000, Michoacan, Mexico TI - Ni-DETA flotation in aqueous media: application of flotation columns AB - It is studied the separation of nickel ions complexed with polyamines (Diethylentriamine: BETA, NH2-CH2-CH2-NH-CH2-NH2) of aqueous solutions, by means of froth flotation, using a completely equipped and automatized flotation columns of the laboratory. The mean size of the bubbles in the liquid-air dispersion was determined by means of the pulling analysis in the system, in order to estimate the flow density of the bubbles (S-b, s(-1)) in the process. The flotation kinetic constant of the complexed nickel species was determined considering the different times of the liquid stay in he column. The results of the experimental measures showed that the separation of aqueous Ni-DETA species can be done by flotation using flotation columns. The separation increases with the presence of the collector. In this study, Ni-DETA recuperations of the 80% in the concentrate were observed MH - Canada MH - Mexico|Michoacan PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - Spanish IS - 0001-9704 UR - ISI:000166458300005 L2 - bubbles;flotation;surface flow;flotation column;ions flotation;surface speed;DIETHYLENETRIAMINE SO - Afinidad 2000 ;57(490):415-423 1965 UI - 15886 AU - Tavera FJ AU - Colwell D AU - Escudero R AU - Finch JA AD - McGill Univ, Dept Min & Met Engn, Montreal, PQ H3A 2T5, CanadaTavera, FJ, Univ Michoacana, Inst Invest Met, Ciudad Univ Edifico U, Morelia 58000, Michoacan, Mexico TI - Estimation of gas holdup in froths by electrical conductivity: application of the standard addition method AB - Gas holdup has been estimated in air-water froths from electrical conductivity measurements using the "standard addition method". The technique was verified by estimating the liquid conductivity as well as gas holdup and comparing with independent estimates. The technique was used to measure gas holdup as a function of position in a froth. The resulting "gas holdup profile" suggests a greater variation than in previous work MH - Canada MH - Mexico|Michoacan PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0001-9704 UR - ISI:000087561400011 L2 - gas holdup;froth;electrical conductivity;flow conductivity cell;COLUMN SO - Afinidad 2000 ;57(486):139-142 1966 UI - 15975 AU - Taylor JE AU - Yunez-Naude A AD - Univ Calif Davis, Davis, CA 95616, USAColegio Mexico, Ctr Estudios Econ, Mexico City 10740, DF, MexicoTaylor, JE, Univ Calif Davis, Davis, CA 95616, USA TI - The returns from schooling in a diversified rural economy AB - Controlling for the endogeneity of activity choice and considering both household-head and family schooling, we find evidence of high returns from schooling in both crop and noncrop activities. As schooling levels increase, the returns from schooling shift away from crop production. Failure to control for activity selection and family schooling is likely to result in biased estimates of the returns from schooling in individual activities MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHERS RP - NOT IN FILE U3 - TC 7 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0002-9092 UR - ISI:000087217200004 L2 - human capital;schooling;agricultural households;Mexico;migration;censored regression;DEPENDENT VARIABLES; EDUCATION; PRODUCTIVITY; MIGRATION; PAKISTAN; GROWTH SO - American Journal of Agricultural Economics 2000 ;82(2):287-297 1967 UI - 16256 AU - Teal PEA AU - Gomez-Simuta Y AU - Proveaux AT AD - USDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USAMexico Medfly Program, Tapachula 30700, Chiapas, MexicoTeal, PEA, USDA ARS, Ctr Med Agr & Vet Entomol, 1700 SW 23 Dr, Gainesville, FL 32604 USA TI - Mating experience and juvenile hormone enhance sexual signaling and mating in male Caribbean fruit flies AB - Young mated male Caribbean fruit flies [Anastrepha suspensa (Loew)] have greater sexual prowess than their virgin counterparts. After mating for the first time, 6- to ir-day-old males released twice as much sex pheromone and acquired another mate in less than half the time required by virgin males of the same age. Mass spectroscopic analysis of extracts of hemolymph from mated and Virgin 7-day-old males resulted in identification of juvenile hormone III bisepoxide and juvenile hormone III in a ratio of 2.5:1. Extracts from mated males contained 3-fold more juvenile hormone than did extracts from virgins. Enhancement of sexual signaling, pheromone release, and mating was induced by topical application of juvenile hormone, methoprene, or fenoxycarb. Newly enclosed adult males treated with juvenoids engaged in sexual signaling, released pheromone, and mated at significantly earlier ages than control males. We conclude that juvenile hormone mediated a positive feedback system that imparted a competitive advantage, guaranteeing that males who mated at an early age would out-compete virgins of the same age for mating opportunities. Additionally. the results support the hypothesis that juvenile hormone is a pivotal hormone coordinating the development of sexual signaling and reproductive maturity in these flies MH - USA MH - Mexico|Chiapas PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 17 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000086195200133 L2 - SUSPENSA LOEW DIPTERA; DROSOPHILA-MELANOGASTER; PSEUDALETIA-UNIPUNCTA; PHEROMONE RELEASE; TEPHRITIDAE; BIOSYNTHESIS; BEHAVIOR; SUCCESS; INVITRO; SYSTEM SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(7):3708-3712 1968 UI - 16589 AU - Tella JL AU - Rodriguez-Estrella R AU - Blanco G AD - CSIC, Estac Biol Donana, Dept Appl Biol, E-41013 Seville, SpainUniv Saskatchewan, Dept Biol, Saskatoon, SK S7N 0W0, CanadaCtr Invest Biol Noroeste, La Paz 23000, BCS, MexicoTella, JL, CSIC, Estac Biol Donana, Dept Appl Biol, Avda Ma Luisa S-N, E-41013 Seville, Spain TI - Louse flies on birds of Baja California AB - Louse flies were collected from 401 birds of 32 species captured in autumn of 1996 in Baja California Sur (Mexico). Only one louse fly species (Microlynchia pusilla) was found. It occurred in four of the 164 common ground doves (Columbina passerina) collected. This is a new a host species for this louse fly MH - Canada MH - Mexico|Baja California Sur MH - Spain PB - LAWRENCE: WILDLIFE DISEASE ASSN, INC RP - NOT IN FILE U3 - TC 4 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0090-3558 UR - ISI:000085067100019 L2 - hippoboscidae;louse flies on birds;Microlynchia pusilla;new host record survey;HIPPOBOSCIDAE; DIPTERA; INFESTATION; MEXICO; SWIFTS; FLY; SUR SO - Journal of Wildlife Diseases 2000 ;36(1):154-156 1969 UI - 16087 AU - Tello PG AU - Gonzalez J AU - Blanco JM AU - Valenzuela R AD - EUITI, Det Fis Aplicada 1, San Sebastian, SpainUPV, Fac CC, Dept Fis Mat, San Sebastian, SpainNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoTello, PG, EUITI, Det Fis Aplicada 1, San Sebastian, Spain TI - Characterization of amorphous FeZrB(Cu) alloys by the inductance spectroscopy method AB - Impedance spectroscopy measurements were carried out on amorphous ribbons of nominal compositions Fe93-x-yZr7BxCuy (x=6,8 and y=0,1,2), in the frequency range of 5 Hz-13 MHz. Two different geometries were used for measurements: a longitudinal one by using an 80-turn solenoid and the magnetoimpedance geometry, where the ac current flows through the ribbon itself. The obtained results showed a larger initial permeability value for longitudinal domain walls, as compared with transverse ones. Results concerning the propagation field showed the opposite behavior. These results are interpreted in terms of the short-range order arrangements of Fe atoms in these alloys, also known as "nanoamorphous demixing structures." (C) 2000 American Institute of Physics. [S0021-8979(00)25408-X] MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000086728800399 L2 - NANOCRYSTALLINE SO - Journal of Applied Physics 2000 ;87(9):7112-7114 1970 UI - 15098 AU - Tenorio-Tagle G AU - Munoz-Tunon C AU - Perez E AU - Maiz-Apellaniz J AU - Medina-Tanco G AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoInst Astrofis Canarias, E-38200 Tenerife, SpainCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainINTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 28080, SpainSpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Sao Paulo, Dept Astron, Inst Astron & Geofis, BR-01060970 Sao Paulo, BrazilTenorio-Tagle, G, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51& 216, Puebla 72840, Mexico TI - On the ongoing multiple blowout in NGC 604 AB - Several facts regarding the structure of NGC 604 are examined here. The three main cavities produced by the mechanical energy from massive stars, which in NGC 604 are spread over a volume of 10(6) pc(3), are shown here to be undergoing blowout into the halo of M33. High-resolution long-slit spectroscopy is used to track the impact from massive stars, while Hubble Space Telescope archive data are used to display the asymmetry of the nebula. NGC 604 is found to be a collection of photoionized filaments and sections of shells that are in direct contact with the thermalized matter ejected by the massive stars. The multiple blowout events presently drain the energy injected by massive stars, and thus the densest photoionized gas is found almost at rest and is expected to suffer a slow evolution MH - Brazil MH - Mexico|Puebla MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089825000020 L2 - galaxies : ISM;HII regions;ISM : individual (NGC 604);ISM : kinematics and dynamics;H-II REGIONS; EVOLUTION; NGC-604; GAS; GALAXIES; M33 SO - Astrophysical Journal 2000 ;541(2):720-727 1971 UI - 14919 AU - Teran JL AU - Gnecco D AU - Galindo A AU - Juarez JR AU - Enriquez RG AU - Soriano M AU - Reynolds WF AD - BUAP, Inst Ciencias, Ctr Quim, Puebla, MexicoNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Toronto, Dept Chem, Toronto, ON M5S BHG, CanadaGnecco, D, BUAP, Inst Ciencias, Ctr Quim, Puebla, Mexico TI - Regioselective oxidation of 3-substituted pyridinium salts AB - (1'R)-(+)-3-Hydroxymethyl-1-(1'-phenyl-ethyl)-pyridinium chloride (1), 1-benzyl-3-[1', 3']-dioxolan-2'-yl-pyridinium chloride (2) and (2'S, 4'S, 5'R)-(-)-1-benzyl-3-(3',4'-dimethyl-5'-phenyl-oxazolidin-2'-yl)-pyridini um bromide (3), were transformed by oxidation with potassium ferricyanide into the corresponding 1H-pyridin-2-ones in excellent yields with high regioselectivity MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - BASEL: MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1420-3049 UR - ISI:000165134900012 L2 - pyridinium salts;regioselective oxidation and chirality;ASYMMETRIC-SYNTHESIS; ROUTE SO - Molecules 2000 ;5(10):1175-1181 1972 UI - 16438 AU - Teran L AU - Meyer-Hoffert U AU - Lezcano-Meza D AU - Bartels J AU - Schluter C AU - Schroeder JM AD - Inst Nacl Enfermedades REsp, Mexico City, DF, MexicoUniv Kiel, Kiel, Germany TI - Th1 and Th2 type cytokines regulate chemokine production from human airway epithelial cells MH - Germany MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY-YEAR BOOK INC RP - NOT IN FILE U3 - TC 0 U4 - Allergy;Immunology U5 - J;Meeting Abstract AV - English IS - 0091-6749 UR - ISI:000085530100857 SO - Journal of Allergy and Clinical Immunology 2000 ;105(1):S293-S293 1973 UI - 14567 AU - Terron JA AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Farmacol & Toxicol, Mexico City, DF, MexicoTerron, JA, NIMH, Pharmacol Sect, Bldg 10,Room 2D57,10 Ctr Dr MSC 1514, Bethesda, MD 20892 USA TI - 2-(2-aminoethyl)-quinoline (D-1997): A novel agonist at craniovascular 5-HT1 receptors relevant to migraine therapy AB - The functional pharmacological properties of a group of quinoline-derivatives were screened for agonist activity at 5-HT1-like receptors mediating vasoconstriction, In experimental models predictive of antimigraine activity, 2-(2-aminoethyl) quinoline hydrochloride (D-1997) exhibited higher potency and efficacy at vasoconstrictor 5-HT1-like receptors than quipazine. D-1997 was also found to activate a novel vasoconstrictor mechanism in the carotid circulation. It is suggested D-1997 may represent a useful lead in the search for better acute antimigraine therapies MH - USA MH - Mexico|Distrito Federal PB - BRANFORD: NEVA PRESS RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 1080-563X UR - ISI:000166159600001 L2 - D-1997;migraine;quinoline derivatives;serotonin;vascular 5-HT1B/1D receptors;vasoconstriction;EXTERNAL CAROTID VASOCONSTRICTION; ISOLATED SAPHENOUS-VEIN; VAGOSYMPATHECTOMIZED DOGS; ANTIMIGRAINE DRUGS; PHARMACOLOGICAL EVIDENCE; MEDIATING CONTRACTION; BIOGENIC SUBSTANCES; CANINE; SUMATRIPTAN; 5-HYDROXYTRYPTAMINE SO - Cns Drug Reviews 2000 ;6(4):267-277 1974 UI - 16489 AU - Terrones H AU - Terrones M AU - Hernandez E AU - Grobert N AU - Charlier JC AU - Ajayan PM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoUniv Autonoma Barcelona, CSIC, Inst Ciencia Mat Barcelona, Barcelona 08193, SpainUniv Catholique Louvain, Unite PCPM, B-1348 Louvain, BelgiumRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USATerrones, H, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - New metallic allotropes of planar and tubular carbon AB - We propose a new family of layered sp(2)-like carbon crystals, incorporating five-, six-, and seven-membered rings in 2D Bravais lattices. These periodic sheets can be rolled so as to generate nanotubes of different diameter and chirality. We demonstrate that these sheets and tubes are metastable and more favorable than C-60, and it is also shown that their mechanical properties are similar to those of graphene. Density of states calculations of all structures revealed an intrinsic metallic behavior, independent of orientation, tube diameter, and chirality MH - Belgium MH - United Kingdom MH - Mexico|Queretaro MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 74 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085383500020 L2 - ELECTRONIC-STRUCTURE; YOUNGS MODULUS; NANOTUBES; C-60 SO - Physical Review Letters 2000 ;84(8):1716-1719 1975 UI - 14821 AU - Terrones M AU - Kamalakaran R AU - Seeger T AU - Ruhle M AD - Max Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoTerrones, M, Max Planck Inst Met Forsch, Seestr 92, D-70174 Stuttgart, Germany TI - Novel nanoscale gas containers: encapsulation of N-2 in CNx nanotubes AB - Gaseous N-2 has been efficiently introduced in the hollow cavities of aligned CNx nanotubes (15-80 nm od) by pyrolysing a jet (spray) solution of Fe(C5H5)(2) and PhCH2NH2 in an Ar atmosphere at 850 degreesC; the aligned material consist of large arrays (2.5 cm(2)) of CNx (x < 0.05) 'bamboo-like' nanotubes (< 100 mum in length); high resolution electron energy loss spectroscopy (HREELS) line-scans and elemental mapping studies reveal that N gas was encapsulated within the hollow compartments of the CNx nanotubes; these results demonstrate for the first time, that CNx nanotubes can be used to fabricate gas storage components MH - Germany MH - Mexico|Queretaro PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000165446400023 L2 - WALLED CARBON NANOTUBES; CAPILLARITY; NANOFIBERS; NANOWIRES; HYDROGEN; STORAGE SO - Physical Chemistry Chemical Physics 2000 ;2(23):2335-2336 1976 UI - 14847 AU - Terrones M AU - Kamalakaran R AU - Seeger T AU - Ruhle M AD - Max Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoTerrones, M, Max Planck Inst Met Forsch, Seestr 92, D-70174 Stuttgart, Germany TI - Novel nanoscale gas containers: encapsulation of N-2 in CNx nanotubes AB - Gaseous N-2 has been efficiently introduced in the hollow cavities of aligned CNx nanotubes (15-80 nm od) by pyrolysing a jet (spray) solution of Fe(C5H5)(2) and PhCH2NH2 in an Ar atmosphere at 850 degreesC; the aligned material consist of large arrays (2.5 cm(2)) of CNx (x < 0.05) 'bamboo-like' nanotubes (< 100 mum in length); high resolution electron energy loss spectroscopy (HREELS) line-scans and elemental mapping studies reveal that N gas was encapsulated within the hollow compartments of the CNx nanotubes; these results demonstrate for the first time, that CNx nanotubes can be used to fabricate gas storage components MH - Germany MH - Mexico|Queretaro PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000165487300023 L2 - WALLED CARBON NANOTUBES; CAPILLARITY; NANOFIBERS; NANOWIRES; HYDROGEN; STORAGE SO - Chemical Communications 2000 ;(23):2335-2336 1977 UI - 15979 AU - Terrones M AU - Terrones H AU - Banhart F AU - Charlier JC AU - Ajayan PM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoMax Planck Inst Met Forsch, D-70569 Stuttgart, GermanyUniv Catholique Louvain, Unite Physicochim & Phys Mat, B-1348 Louvain, BelgiumRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USATerrones, H, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Coalescence of single-walled carbon nanotubes AB - The coalescence of single-walled nanotubes is studied in situ under electron irradiation at high temperature in a transmission electron microscope. The merging process is investigated at the atomic level, using tight-binding molecular dynamics and Monte Carte simulations. Vacancies induce coalescence via a zipper-like mechanism, imposing a continuous reorganization of atoms on individual tube Lattices along adjacent tubes. Other topological defects induce the polymerization of tubes. Coalescence seems to be restricted to tubes with the same chirality, explaining the low frequency of occurrence of this event MH - Belgium MH - United Kingdom MH - Germany MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 169 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000087112600046 L2 - FULLERENES; GROWTH SO - Science 2000 ;288(5469):1226-1229 1978 UI - 15524 AU - Testi L AU - Hofner P AU - Kurtz S AU - Rupen M AD - Osservatorio Astrofis Arcetri, I-50125 Florence, ItalyUniv Puerto Rico, Dept Phys, San Juan, PR 00931, USACornell Univ, NAIC, Arecibo Observ, Arecibo, PR 00612, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoNatl Radio Astron Observ, Socorro, NM 87801, USATesti, L, Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy TI - Detection of the thermal radio continuum emission from the G9.62+0.19-F Hot Core AB - We present new high resolution and high sensitivity multi-frequency VLA radio continuum observations of the G9.62+0.19-F hot molecular core. We detect for the first time faint centimetric radio continuum emission at the position of the core. The centimetric continuum spectrum of the source is consistent with thermal emission from ionised gas. This is the first direct evidence that a newly born massive star is powering the G9.62+0.19-F hot core MH - Italy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Letter AV - English IS - 0004-6361 UR - ISI:000088587000002 L2 - ISM : HII regions;ISM : individual objects : G9,62+0.19;stars : formation;H-II REGIONS; MASSIVE STARS; HII-REGIONS; AMMONIA; DENSE; LINE SO - Astronomy and Astrophysics 2000 ;359(2):L5-L8 1979 UI - 14989 AU - Thalasso F AU - Omil F AU - Otero JO AU - Lema JM AD - IPN, CINVESTAV, Dept Biotechnol, Mexico City 07360, DF, MexicoUniv Santiago de Compostela, Dept Chem Engn, Inst Technol, Santiago De Compostela, SpainThalasso, F, IPN, CINVESTAV, Dept Biotechnol, 2508 Av IPN 2508,Col Sand Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Treatment of methanol in a dry biofilm reactor using tubular carrier AB - A 13.41 Dry Tubular Biofilm reactor (DTB), with 19 PVC tubes as carrier, was used to treat polluted air using methanol as a model pollutant. The design of this reactor was based on the creation of a mist by contacting the waste gas and a discontinuous liquid nutrient supply into an atomising nozzle. Air was fed into the reactor at specific gas flow rates from 60 to 230 m(3)/m(3) h, containing from 0.25 to 2.84x10(-3) kg/m(3) of methanol (volumetric loading rates from 1.4 to 4.7 kg/m(3) d). Biofilm growth was observed from the very beginning of the experiment although preferentially on the reactor's wall and not on the tubular carrier. Methanol degradation was observed to increase along the experiment and reached 1.24 kg/m(3).d. The efficiency of this system was limited by the clogging of the tubes used as carrier. The biofilm developed directly on the wall of the reactor had a specific methanol degradation rate of 1.08 kg/kgVSS.h, while only 0.6 kg/kgVSS h of methanol were degraded after a long lag phase by the biomass developed inside the tubular carrier. Another experiment was carried out with the empty reactor without PVC tubing. In that case, a specific degradation rate of 4.15 kg/m(3).d was observed, which confirm that PVC tubular carrier was clearly not favourable to the process MH - Mexico|Distrito Federal MH - Spain PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000089995400059 L2 - carrier;dry tubular biofilm reactor;VOC;waste gas treatment;SOLID-SURFACES; ATTACHMENT SO - Water Science and Technology 2000 ;42(5-6):419-427 1980 UI - 16239 AU - Tice RR AU - Agurell E AU - Anderson D AU - Burlinson B AU - Hartmann A AU - Kobayashi H AU - Miyamae Y AU - Rojas E AU - Ryu JC AU - Sasaki YF AD - Integrated Lab Syst Inc, Res Triangle Pk, NC 27709, USAAB Astra, Safety Assessment, Sodertalje, SwedenBIBRA Int, Surrey, EnglandGlaxo Wellcome, Ware, Herts, EnglandNovartis Pharma AG, Basel, SwitzerlandShiseido Co Ltd, Safety & Analyt Res Ctr, Yokohama, Kanagawa, JapanFujisawa Pharmaceut Co Ltd, Toxicol Res Labs, Osaka 532, JapanUNAM, Inst Invest Biomed, Mexico City, DF, MexicoKorea Inst Sci & Technol, Toxicol Lab, Seoul 130650, South KoreaTice, RR, Integrated Lab Syst Inc, POB 13501, Res Triangle Pk, NC 27709 USA TI - Single cell gel/comet assay: Guidelines for in vitro and in vivo genetic toxicology testing AB - At the International Workshop on Genotoxicity Test Procedures (IWGTP) held in Washington, DC, March 25-26, 1999, an expert panel met to develop guidelines for the use of the single-cell gel (SCG)/Comet assay in genetic toxicology. The expert panel reached a consensus that the optimal version of the Comet assay for identifying agents with genotoxic activity was the alkaline (pH, 13) version of the assay developed by Singh et al. [1988]. The pH > 13 version is capable of detecting DNA single-strand breaks (SSB), alkali-labile sites (ALS), DNA-DNA/DNAprotein cross-linking, and SSB associated with incomplete excision repair sites. Relative to at her genotoxicity tests, the advantages of the SCG assay include its demonstrated sensitivity for detecting low levels of DNA damage, the requirement for small numbers of cells per sample, its flexibility, its low costs, ifs ease of application, and the short time needed to complete a study. The expert panel decided that no single version of the alkaline (pH > 13) Comet assay was clearly superior. However, critical technical steps within the assay were discussed and guidelines developed for preparing slides with agarose gels, lysing cells to liberate DNA, exposing the liberated DNA to alkali to produce single-stranded DNA and to express ALS as SSB, electrophoresing the DNA using pH > 13 alkaline conditions, alkali neutralization, DNA staining, comet visualization, and data collection. Based on the current state of knowledge, the expert panel developed guidelines for conducting in vitro or in vivo Comet assays. The goal of the expert panel was to identify minimal standards for obtaining reproducible and reliable Comet data deemed suitable for regulatory submission, The expert panel used the current Organization for Economic Go-operation and Development (OECD) guidelines Far in vitro and in vivo genetic toxicological studies as guides during the development of the corresponding in vitro and in vivo SCG assay guidelines. Guideline topics considered included initial considerations, principles of the test method, description of the test method, procedure, results, data analysis and reporting. Special consideration was given by the expert panel to the potential adverse effect of DNA degradation associated with cytotoxicity on the interpretation of Comet assay results. The expert panel also discussed related SCG methodologies that might be useful in the interpretation of positive Comet data, The related methodologies discussed included: (1) the use of different pH conditions during electrophoreses to discriminate between DNA strand breaks and ALS (2) the use of repair enzymes or antibodies to detect specific classes of DNA damage; (3) the use of a neutral diffusion assay to identify apoptotic/necrotic cells; and (4) the use of the acellular SCG assay to evaluate the ability of a test substance to interact directly with DNA. The alkaline (pH > 13) Comet assay guidelines developed by the expert panel represent a work in progress. Additional information is needed before the assay can be critically evaluated for its utility in genetic toxicology. The information needed includes comprehensive data on the different sources of variability (e.g., cell to cell, gel to gel, run to run, culture to culture, animal to animal, experiment to experiment) intrinsic to the alkaline (pH > 3) SCG assay, the generation of a large database based on in vitro and in vivo testing using these guidelines, and the results of appropriately designed multilaboratory international validation studies. (C) 2000 Wiley-Liss, Inc MH - United Kingdom MH - Japan MH - Mexico|Distrito Federal MH - South Korea MH - Sweden MH - Switzerland MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 716 U4 - Environmental Sciences;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0893-6692 UR - ISI:000086283100008 L2 - single cell gel assay;Comet assay;DNA damage;genotoxicity;alkaline electrophoresis;ELECTROPHORESIS COMET ASSAY; SPRAGUE-DAWLEY RATS; INDUCED DNA-DAMAGE; GEL-ELECTROPHORESIS; MUTAGENICITY TEST; HUMAN-LYMPHOCYTES; INDIVIDUAL CELLS; STRAND BREAKS; GENOTOXICITY; APOPTOSIS SO - Environmental and Molecular Mutagenesis 2000 ;35(3):206-221 1981 UI - 16508 AU - Tiemann KJ AU - Gardea-Torresdey JL AU - Gamez G AU - Dokken K AU - Cano-Aguilera I AU - Renner MW AU - Furenlid LR AD - Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968, USAUniv Guanajuato, Fac Quim, Guanajuato, MexicoBrookhaven Natl Lab, Dept Appl Sci, Natl Synchrotron Light Source, Upton, NY 11973, USAGardea-Torresdey, JL, Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968 USA TI - Effects of oxidation state on metal ion binding by Medicago sativa (alfalfa): Atomic and X-ray absorption spectroscopic studies with Fe(II) and Fe(III) AB - We present here experimental results that investigate the effects of metal-ion binding on iron-ion sorption to and recovery from alfalfa biomass. Fe(II)- and Fe(III)-ion binding were measured in order to ascertain the differences in binding strengths due to changes in oxidation state. Stronger binding was found for iron(III)-biomass as compared to iron(II)-biomass. The optimal pH for iron uptake was determined to be 5. The results of pH binding profile, iron desorption, and temperature-dependent binding experiments as well as X-ray spectroscopic (XAS) measurements all suggest that binding of iron by alfalfa biomass may be occurring through carboxyl ligands. The XAS experiments further demonstrate that the metal binding proceeds without an oxidation state change, and both iron(II) and iron(III) have similar coordination environments. The information presented will assist in understanding the binding of other metals to alfalfa biomass and in developing methods for their recovery MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0013-936X UR - ISI:000085352300024 L2 - HEAVY-METALS; REMOVAL SO - Environmental Science & Technology 2000 ;34(4):693-698 1982 UI - 15934 AU - Timossi CM AU - Barrios-de-Tomasi J AU - Gonzalez-Suarez R AU - Arranz MC AU - Padmanabhan V AU - Conn PM AU - Ulloa-Aguirre A AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Pharmacol, Mexico City 04510, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoInst Nacl Endocrinol, La Habana, CubaUniv Michigan, Reprod Sci Program, Ann Arbor, MI 48109, USAOregon Hlth Sci Univ, Beaverton, OR, USAUlloa-Aguirre, A, Ctr Med Nacl S XXI, Unidad Invest Med Reprod, Coordinac Invest Med, Av Cuauhtemoc 30,Apdo Postal 73-032,Col Doctores, Mexico City 06725, DF, Mexico TI - Differential effects of the charge variants of human follicle-stimulating hormone AB - FSH is synthesized and secreted by the anterior pituitary gland in multiple molecular forms; the release of these isoforms depends on the endocrine status of the donor at the time of sample collection. In the present study, we analysed the possibility that the FSH charge isoforms may exert differential effects at the target cell. Seven FSH isoform mixes were isolated from pooled anterior pituitary glycoprotein extracts by high resolution chromatofocusing, followed by affinity chromatography, which removed nearly 90% of the LH that co-eluted with the FSH isoforms during chromatofocusing. The isoforms (isoform I, pH > 7.10; II, pH range 6.60-6.20; III, pH 5.47-5.10; IV, pH 5.03-4.60; V, pH 4.76-4.17; VI, pH 4.05-3.82 and VII, pH <3.80) were then tested for their capacity to stimulate cAMP release, androgen aromatization and tissue-type plasminogen activator (tPA) enzyme activity and cytochrome P450 aromatase, tPA and inhibin a-sub;nit mRNA production by rat granulosa cells in culture. cAMP and oestradiol production were determined by RIA, tPA enzyme activity by SDS-PAGE and zymography and all mRNAs by northern blot hybridization analysis and semiquantitative RT-PCR. AU isoforms, with the exception of isoform I, stimulated synthesis and release of cAMP, oestrogen and tPA enzyme activity in a dose-dependent manner; the potency of the less acidic isoforms (PH 6.60-4.60) was greater than that exhibited by the more acidic/sialylated analogs (pH 4.76 to <3.80; potencies II>III>IV>V>VII>VI). A similar trend was observed in terms of cytochrome P450 aromatase and tPA mRNA production. In contrast, when FSH-stimulated production of cr-inhibin mRNA was analysed, isoforms V-VII were significantly more potent (two- to threefold) than the less acidic/sialylated counterparts (II-IV). In contrast to isoforms II-VII (which behaved as FSH agonists), isoform I (elution pH >7.10) completely blocked P450 aromatase and tPA mRNA expression, without altering that of a constitutively expressed gene (glyceraldehyde-3-phosphate dehydrogenase). These results show for the first time that the naturally occurring human FSH isoforms may exhibit differential or even unique effects at the target cell level MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: SOC ENDOCRINOLOGY RP - NOT IN FILE U3 - TC 18 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0022-0795 UR - ISI:000087347000004 L2 - RAT GRANULOSA-CELLS; MESSENGER-RIBONUCLEIC-ACID; INHIBIN ALPHA-SUBUNIT; SIGNAL-TRANSDUCTION; LUTEINIZING-HORMONE; FSH RECEPTOR; IN-VITRO; GLYCOPROTEIN HORMONES; CYCLIC ADENOSINE-3',5'-MONOPHOSPHATE; BIOLOGICAL CHARACTERIZATION SO - Journal of Endocrinology 2000 ;165(2):193-205 1983 UI - 16701 AU - Tkacenko MG AU - Tkachuk VV AU - Wilson RG AU - Yaschenko IV AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoMoscow Ctr Continuous Math Educ, Moscow 121002, RussiaTkacenko, MG, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Av Michoacan & La Purisima,AP 55-532, Mexico City 09340, DF, Mexico TI - No submaximal topology on a countable set is T-1-complementary AB - Two T-1-topologies tau and mu given on the same set X, are called transversal if their union generates the discrete topology on X. The topologies tau and mu are T-1-complementary if they are transversal and their intersection is the cofinite topology on X. We establish that for any connected Tychonoff topology there exists a connected Tychonoff transversal one. Another result is that no T-1-complementary topology exists for the maximal topology constructed by van Douwen on the rational numbers. This gives a negative answer to Problem 162 from Open Problems in Topology (1990) MH - Mexico|Distrito Federal MH - Russia PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000083317100036 L2 - transversal topology;T-1-complement;connected space;strongly sigma-discrete space SO - Proceedings of the American Mathematical Society 2000 ;128(1):287-297 1984 UI - 15150 AU - Toojinda T AU - Broers LH AU - Chen XM AU - Hayes PM AU - Kleinhofs A AU - Korte J AU - Kudrna D AU - Leung H AU - Line RF AU - Powell W AU - Ramsay L AU - Vivar H AU - Waugh R AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USAKasetsart Univ, Natl Ctr Genet Engn & Biotechnol, Nakorn Pathom, ThailandNunhems Zaden BV, NL-6080 AA Haelen, NetherlandsWashington State Univ, Dept Crop & Soil Sci, Pullman, WA 99164, USAAgriBio Tech, W Kingston, RI 02892, USAIRRI, Manila 1099, PhilippinesScottish Crop Res Inst Invergowrie, Dundee DD2 5DA, ScotlandCIMMYT, ICARDA, Barley Program, Mexico City 6, DF, MexicoHayes, PM, Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA TI - Mapping quantitative and qualitative disease resistance genes in a doubled haploid population of barley (Hordeum vulgare) AB - Stripe rust, leaf rust, and Barley Yellow Dwarf Virus (BYDV) are important diseases of barley (Hordeum vulgare L). Using 94 doubled-haploid lines (DH) from the cross of Shyri x Galena, multiple disease phenotype datasets, and a 99-marker linkage map, we determined the number, genome location, and effects of genes conferring resistance to these diseases. We also mapped Resistance Gene Analog Polymorphism (RGAP) loci, based on degenerate motifs of cloned disease resistance genes, in the same population. Leaf rust resistance was determined by a single gene on chromosome 1 (7H), QTLs on chromosomes 2 (2H), 3 (3H), 5 (IH), and 6 (6H) were the principal determinants of resistance to stripe rust. Two-locus QTL interactions were significant determinants of resistance to this disease. Resistance to the MAV and PAV serotypes of BYDV was determined by coincident QTLs on chromosomes 1 (7H), 4 (4H), and 5 (1H), QTL interactions were not significant fur BYDV resistance. The associations of molecular markers with qualitative and quantitative disease resistance loci will be a useful information for marker-assisted selection MH - Mexico|Distrito Federal MH - Netherlands MH - Philippines MH - United Kingdom MH - Thailand MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 38 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000089517200011 L2 - barley;genome mapping;stripe rust;leaf rust;BYDV;Resistance Gene Analog Polymorphism;QTL;YELLOW DWARF VIRUS; F-SP HORDEI; RFLP MARKERS; STRIPE RUST; LINKAGE; WHEAT; PLANTS; MAIZE; INTEGRATION; ANALOGS SO - Theoretical and Applied Genetics 2000 ;101(4):580-589 1985 UI - 15195 AU - Torchynska TV AU - Gomez JP AU - Polupan GP AU - Espinoza FGB AU - Borquez AG AU - Korsunskaya NE AU - Khomenkova LY AD - Inst Politecn Nacl, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond, UA-28 Kiev, UkraineTorchynska, TV, Inst Politecn Nacl, Ed ,UPALM, Mexico City 07738, DF, Mexico TI - Complex nature of the red photoluminescence band and peculiarities of its excitation in porous silicon AB - Photoluminescence and photoluminescence excitation spectroscopies, scanning electron microscopy, and atomic force microscopy were used to study the photoluminescence mechanism in porous silicon. The dependences of photoluminescence parameters on electrochemical etching regimes, excitation light wavelength, and vacuum ageing have been investigated. We show that intensive and broad "red" luminescence band (similar to 600-800 nm) is non-elementary, and can be decomposed into three elementary bands. The mechanisms of the elementary bands are discussed. (C) 2000 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000089542500010 L2 - porous silicon;photoluminescence;etching;VISIBLE PHOTOLUMINESCENCE; SI PHOTOLUMINESCENCE; LUMINESCENCE; MECHANISM; CONFINEMENT; SILOXENE; ORIGIN; OXYGEN SO - Applied Surface Science 2000 ;167(3-4):197-204 1986 UI - 16080 AU - Torchynska TV AU - Korsunska NE AU - Dzhumaev BR AU - Khomenkova LY AD - UPALM, Natl Polytech Inst, ESFM, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, Kiev, UkraineTorchynska, TV, UPALM, Natl Polytech Inst, ESFM, Mexico City 07738, DF, Mexico TI - Three approaches to surface substance role investigation in porous silicon photoluminescence and its excitation AB - Photoluminescence (PL) and photoluminescence excitation spectra research, as well as secondary ion mass spectroscopy and infrared vibration spectra measurements, were used for the investigation of PL excitation mechanism of porous silicon. It is shown that there are two types of porous silicon PL excitation spectra: one that consists of visible and ultraviolet bands and one that contains only an ultraviolet one. The different dependencies of intensity of each excitation band upon anodization regimes, as well as ageing and thermal treatment, were observed, Two excitation channels have been shown in porous silicon. The visible PL excitation band at 300 K has been attributed to light absorption of some species on the Si wire surface. The nature of ultraviolet excitation band is also discussed. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000086823700015 L2 - luminescence;excitation spectra;pourous silicon;SI PHOTOLUMINESCENCE; OXYGEN SO - Journal of Physics and Chemistry of Solids 2000 ;61(6):937-941 1987 UI - 14890 AU - Torner L AU - Nava G AU - Toschi N AU - Clapp C AU - Neumann ID AD - Max Planck Inst Psychiat, D-8000 Munich, GermanyNeurobiol Ctr, Mexico City, DF, Mexico TI - Increased expression of brain prolactin during lactation affects neuroendocrine responses to stress MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences U5 - J;Meeting Abstract AV - English IS - 0953-816X UR - ISI:000088236602365 SO - European Journal of Neuroscience 2000 ;12():414-414 1988 UI - 15406 AU - Torres-Mejia G AU - Salmeron-Castro J AU - Tellez-Rojo MM AU - Lazcano-Ponce EC AU - Juarez-Marquez SA AU - Torres-Torija I AU - Gil-Abadie L AU - Buiatti E AD - Inst Nacl Salud Publ, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoCtr Documentaz Salute, Bologna, ItalyTorres-Mejia, G, Univ London London Sch Hyg & Trop Med, Dept Epidemiol & Populat Hlth, CPH Unit, Keppel St, London WC1E 7HT, England TI - Call and recall for cervical cancer screening in a developing country: A randomised field trial AB - A randomised field trial was used to assess Mexican women's response to a mailed invitation for a Papanicolaou test. A sample of 4,802 women, 20 to 64 years old, chosen at random from the Mexican Social Security Institute Register were randomly assigned to an intervention and to a control group. A letter of invitation and a reminder were sent to the intervention group, A letter was also sent to the control group at the end of the follow-up period (8.5 weeks) in order to compare the response among women who received a letter in both groups. Cumulative incidence and incidence rates were used to determine the response and the speed of response, respectively. The response among women who had received the letter was 33.5% (efficacy) in the intervention group, while 5.9% (p<0.001) in the control group attended a Papanicolaou test. For the total of women invited, the response was 20.1% (effectiveness) and 3.3% (p<0.001), respectively. The response was greater in rural areas (rural vs. urban/suburban; p = 0.002) and eldest women (50-64 vs. 20-49; p = 0.02), The response rate was 7 times grater in the intervention than in the control group (RR = 7.1; 95% CI 5.4-9.4; p < 0.001), A mailed invitation to have a Papanicolaou test substantially increases attendance by women who receive it. A mailed reminder improves results. This strategy could be implemented in addition to the ones already in use, mainly among rural and elderly women. Int. J. Cancer 87: 869-873,2000, (C) 2000 Wiley-Liss, Inc MH - United Kingdom MH - Italy MH - Mexico|Morelos PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 4 U4 - Oncology U5 - J;Article AV - English IS - 0020-7136 UR - ISI:000088874800017 L2 - MORTALITY; CYTOLOGY; PROGRAM; MEXICO SO - International Journal of Cancer 2000 ;87(6):869-873 1989 UI - 16278 AU - Torres-Mendez LA AU - Ruiz-Suarez JC AU - Sucar LE AU - Gomez G AD - McGill Univ, Montreal, PQ H3A 2A7, CanadaIPN, CINVESTAV, Dept Appl Phys, Unidad Merida, Merida, Yucatan, MexicoInst Tecnol & Estudios Super Monterrey, Dept Comp, Cuernavaca, Morelos, MexicoTorres-Mendez, LA, McGill Univ, Montreal, PQ H3A 2A7, Canada TI - Translation, rotation, and scale-invariant object recognition AB - A method for object recognition, invariant under translation, rotation, and scaling, is addressed, The first step of the method (preprocessing) takes into account the invariant properties of the normalized moment of inertia and a novel coding that extracts topological object characteristics. The second step (recognition) is achieved by using a holographic nearest-neighbor algorithm (HNN), in which vectors obtained in the preprocessing step are used as inputs to it. The algorithm is tested in character recognition, using the 26 upper case letters of the alphabet. Only four different orientations and one size (for each letter) vr ere used for training. Recognition was tested with 17 different sizes and 14 rotations. The results are encouraging, since we achieved 98% correct recognition. Tolerance to boundary deformations and random noise was tested. Results for character recognition in "real" images of car plates are presented as well MH - Canada MH - Mexico|Morelos MH - Mexico|Yucatan PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence;Computer Science, Cybernetics;Computer Science, Interdisciplinary Applications U5 - J;Article AV - English IS - 1094-6977 UR - ISI:000086192300013 L2 - character recognition;holographic nearest neighbor;invariant-object recognition;ORDER NEURAL NETWORKS; PATTERN-RECOGNITION; PROJECTION-INVARIANT; IMAGE-ANALYSIS; SHIFT; MOMENTS; HARMONICS SO - Ieee Transactions on Systems Man and Cybernetics Part C-Applications and Reviews 2000 ;30(1):125-130 1990 UI - 14628 AU - Torres-Sanchez L AU - Lopez-Carrillo L AU - Lopez-Cervantes M AU - Rueda-Neria C AU - Wolff MS AD - Natl Inst Publ Hlth, Ctr Res Hlth Serv, Cuernavaca 62508, Morelos, MexicoNatl Polytechn Inst, Ctr Res & Adv Studies, Mexico City 07300, DF, MexicoCUNY Mt Sinai Sch Med, Dept Community Med, Div Environm & Occupat Med, New York, NY 10029, USATorres-Sanchez, L, Natl Inst Publ Hlth, Ctr Res Hlth Serv, Cuernavaca 62508, Morelos, Mexico TI - Food sources of phytoestrogens and breast cancer risk in Mexican women AB - We analyzed the intake of selected foods that contain phytoestrogens in relation to breast cancer (BC) risk using data from a hospital-based case-control study performed in Mexico City from 1994 to 1995. A total of 198 women with BC, aged 21-79 years, were individually age matched to an identical number of women with no breast disease. By a direct interview, information on socioeconomic characteristics and diet was obtained. A semiquantitative questionnaire was used to estimate the frequency of consumption of 95 foods. The effect of selected foods that contain phytoestrogens on BC risk was estimated using logistic regression models. The adjusted odds ratio for the consumption of more than one slice of onion per day and BC was 0.27 (95% confidence interval = 0.16-0.47), with a statistically significant trend (p < 0.001). This protective effect remained after adjustment for known risk factors of BC. Among premenopausal women, there was also a protective and significant effect due to the intake of lettuce and spinach and nonsignificant protective effects for the consumption of apples and herbal tea. Additional studies aimed at evaluating the potential protective effect of particular phytoestrogens bn BC risk are needed MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 9 U4 - Oncology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0163-5581 UR - ISI:000165888100003 L2 - POTENTIALLY ANTICARCINOGENIC FLAVONOIDS; PREMENOPAUSAL JAPANESE WOMEN; DRINKING GREEN TEA; DIET; CONSUMPTION; NETHERLANDS; INHIBITION; QUERCETIN; ESTROGENS SO - Nutrition and Cancer-An International Journal 2000 ;37(2):134-139 1991 UI - 16462 AU - Torres-Vega MA AU - Gonzalez RA AU - Duarte M AU - Poncet D AU - Lopez S AU - Arias CF AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62250, Morelos, MexicoUniv La Rochelle, Lab Genie Proteique & Cellulaire, La Rochelle 01, FranceINRA, Lab Virol & Immunobiol Mol, F-78352 Jouy En Josas, FranceArias, CF, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - The C-terminal domain of rotavirus NSP5 is essential for its multimerization, hyperphosphorylation and interaction with NSP6 AB - Rotavirus NSP5 is a non-structural phosphoprotein with putative autocatalytic kinase activity, and is present in infected cells as various isoforms having molecular masses of 26, 28 and 30-34 kDa, We have previously shown that NSP5 forms oligomers and interacts with NSP6 in yeast cells. Here we have mapped the domains of NSP5 responsible for these associations. Deletion mutants of the rotavirus YM NSP5 were constructed and assayed for their ability to interact with full-length NSP5 and NSP6 using the yeast two-hybrid assay. The homomultimerization domain was mapped to the 20 C-terminal aa of the protein, which have a predicted alpha-helical structure. A deletion mutant lacking the 10 C-terminal aa (Delta C10) failed to multimerize both in yeast cells and in an in vitro affinity assay. When transiently expressed in MA104 cells, NSP5 became hyperphosphorylated (30-34 kDa isoforms), In contrast, the Delta C10 mutant produced forms equivalent to the 26 and 28 kDa species, but was poorly hyperphosphorylated, suggesting that multimerization is important for this proposed activity of the protein. The interaction domain with NSP6 was found to be present in the 35 C-terminal aa of NSP5, overlapping the multimerization domain of the protein, and suggesting that NSP6 might have a regulatory role in the self-association of NSP5, NSP6 was also found to interact with wild-type NSP5, but not with its mutant Delta C10, in cells transiently transfected with plasmids encoding these proteins, confirming the relevance of the 10 C-terminal aa for the formation of the heterocomplex MH - France MH - Mexico|Morelos PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 28 U4 - Biotechnology & Applied Microbiology;Virology U5 - J;Article AV - English IS - 0022-1317 UR - ISI:000085506100028 L2 - PROTEIN-KINASE; NONSTRUCTURAL PROTEINS; SIGNAL-TRANSDUCTION; RNA-POLYMERASE; IN-VIVO; PHOSPHORYLATION; DIMERIZATION; OLIGOMERIZATION; PHOSPHOPROTEIN; EXPRESSION SO - Journal of General Virology 2000 ;81():821-830 1992 UI - 16232 AU - Torres-Vitela MR AU - Castillo A AU - Ibarra-Velazquez LM AU - Navarro-Hidalgo V AU - Rodriguez-Garcia MO AU - Martinez-Gonzales NE AU - Perez-Montano JA AD - Univ Guadalajara, Dept Farmacobiol, Lab Microbiol Sanit, Guadalajara 44430, Jalisco, MexicoTexas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USATorres-Vitela, MR, Univ Guadalajara, Dept Farmacobiol, Lab Microbiol Sanit, Guadalajara 44430, Jalisco, Mexico TI - Survival of Vibrio cholerae O1 in ceviche and its reduction by heat pretreatment of raw ingredients AB - The survival of Vibrio cholerae O1 serotypes Inaba and Ogawa was determined in ceviche prepared from inoculated ground fish. Ground mackerel purchased from a seafood distribution center was inoculated with V. cholerae and stored at 8 or 20 degrees C. Counts of V. cholerae decreased in 2.6 to 2.7 log(10) CFU/g during 96 h of storage at 8 degrees C or 2.5 to 2.6 log(10) CFU/g during 24 h at 20 degrees C. Survival studies indicated that serotype Inaba decreased its number following a linear or retarded trend, whereas serotype Ogawa followed an accelerated death trend. No effect of the initial level of inoculum was observed. Odor scores of ceviche indicated that this food became marginally acceptable within as little as 48 h of storage at 8 degrees C or 3 h at 20 degrees C and were related to total volatile nitrogen values but not to aerobic plate counts, pH, or coliform counts. A heat pretreatment that consisted of stirring 100 g of inoculated ground fish into 40 mi of boiling water produced an 8-log reduction of V. cholerae within 3 min without affecting the color, odor, or flavor of ceviche prepared with such pretreated fish. According to this study, V. cholerae present in contaminated ceviche will likely survive longer than the shelf life of this food. Preheating the ground raw fish used for preparing ceviche for 3 min should effectively eliminate V. cholerae O1, providing science-based conditions for implementing a critical control point if a hazard analysis critical control point plan were to be developed for preparation of ceviche MH - Mexico|Jalisco MH - USA PB - DES MOINES: INT ASSOC MILK FOOD ENVIRONMENTAL SANITARIANS, INC RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000086336600004 L2 - UNITED-STATES; FISH SO - Journal of Food Protection 2000 ;63(4):445-450 1993 UI - 15223 AU - Torres CR AU - Hanazaki H AU - Ochoa J AU - Castillo J AU - Van Woert M AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoTohoku Univ, Inst Fluid Sci, Aoba Ku, Sendai, Miyagi 9808577, JapanCtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoSan Diego State Univ, Dept Math, San Diego, CA 92812, USANOAA, Natl Environm Satellite Data & Informat Serv, Off Res & Applicat, Washington, DC 20233, USAUniv Tokyo, Dept Mech Engn, Bunkyo Ku, Tokyo 1138656, JapanTorres, CR, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Flow past a sphere moving vertically in a stratified diffusive fluid AB - Numerical studies are described of the flows generated by a sphere moving vertically in a uniformly stratified fluid. It is found that the axisymmetric standing vortex usually found in homogeneous fluids at moderate Reynolds numbers (25 less than or equal to Re less than or equal to 200) is completely collapsed by stable stratification, generating a strong vertical jet. This is consistent with our experimental visualizations. For Re = 200 the complete collapse of the vortex occurs at Froude number F similar or equal to 19, and the critical Froude number decreases slowly as Re increases. The Froude number and the Reynolds number are here defined by F = W/Na and Re = 2Wa/v, with W being the descent velocity of the sphere, N the Brunt-Vaisala frequency, a the radius of the sphere and v the kinematic viscosity coefficient. The inviscid processes, including the generation of the vertical jet, have been investigated by Eames & Hunt (1997) in the context of weak stratification without buoyancy effects. They showed the existence of a singularity of vorticity and density gradient on the rear axis of the flow and also the impossibility of realizing a steady state. When there is no density diffusion, all the isopycnal surfaces which existed initially in front of the sphere accumulate very near the front surface because of density conservation and the fluid in those thin layers generates a rear jet when returning to its original position. In the present study, however, the fluid has diffusivity and the buoyancy effects also exist. The density diffusion prevents the extreme piling up of the isopycnal surfaces and allows the existence of a steady solution, preventing the generation of a singularity or a jet. On the other hand, the buoyancy effect works to increase the vertical velocity to the rear of the sphere by converting the potential energy to vertical kinetic energy, leading to the formation of a strong jet. We found that the collapse of the vortex and the generation of the jet occurs at much weaker stratifications than those necessary for the generation of strong lee waves, showing that jet formation is independent of the internal waves. At low Froude numbers (F less than or equal to 2) the lee wave patterns showed good agreement with the linear wave theory and the previous experiments by Mowbray & Rarity (1967). At very low Froude numbers (F less than or equal to 1) the drag on a sphere increases rapidly, partly due to the lee wave drag but mainly due to the large velocity of the jet. The: jet causes a reduction of the pressure on the rear surface of the sphere, which leads to the increase of pressure drag. High velocity is induced also just outside the boundary layer of the sphere so that the frictional drag increases even more significantly than the pressure drag MH - Japan MH - Mexico|Baja California MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000089392300008 SO - Journal of Fluid Mechanics 2000 ;417():211-236 1994 UI - 15609 AU - Torres E AU - Vazquez-Duhalt R AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Cuernavaca 62250, Morelos, MexicoVazquez-Duhalt, R, Univ Maryland, Ctr Agr Biotechnol, 5115 Plant Sci Bldg, College Pk, MD 20742 USA TI - Chemical modification of hemoglobin improves biocatalytic oxidation of PAHs AB - Chemical modifications on human hemoglobin were performed with the aim to change both surface and active-site hydrophobicities. The modifications included covalent coupling of poly(ethylene)glycol (5000 MW) on free amino groups and the methyl esterification of free carboxylic groups. The modified hemoglobin was assayed for the oxidation of 11 polycyclic aromatic hydrocarbons (PAHs) and 2 organosulfur aromatic compounds, Acenaphthene, anthracene, azulene, benzo(a)pyrene, fluoranthene, fluorene, phenanthrene, and pyrene were transformed to their respective quinones, while for chrysene and biphenyl no biocatalytic reaction could be detected. Dibenzothiophene and thianthrene were oxidized to form sulfoxides. The doubly modified hemoglobin, PEG-Methemoglobin, showed up to 10 times higher activity than the unmodified protein, The kinetic constants show that the PEG-Met-hemoglobin has a significantly higher catalytic efficiency. The equilibrium substrate binding constants for unmodified and PEG-Met-modified hemoglobis and hemoglobin show that this catalytic enhancement could be attributed to the affinity increase for hydrophobic substrates in the modified protein. (C) 2000 Academic Press MH - USA MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 13 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000088363700005 L2 - chemical modifications;biocatalysis;hemoglobin;hemoproteins;PAHs;POLYCYCLIC AROMATIC-HYDROCARBONS; MISCIBLE ORGANIC-SOLVENTS; LIGNIN PEROXIDASE; CYTOCHROME-C; HYDROPHOBICITY SO - Biochemical and Biophysical Research Communications 2000 ;273(3):820-823 1995 UI - 14735 AU - Torres J AU - Reyes-Leon A AU - Leal-Herrera Y AU - Gonzalez-Valencia G AU - Atherton J AU - Munoz O AD - Mexico Inst Seguro Social, Mexico City, DF, MexicoUniv Hosp, Nottingham, England TI - Arrangements or genes inside the cag pathogenicity island in H-pylori strains isolated from Mexican patients MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000090131200109 SO - Gut 2000 ;47():A28-A29 1996 UI - 14736 AU - Torres J AU - Camorlinga-Ponce M AU - Perez-Perez G AU - Gonzalez-Valencia G AU - Gonzalez-Valencia G AU - Munoz O AD - Inst Mexicano Seguro Social, Mexico City, DF, MexicoNYU, New York, NY, USA TI - Assessment of the string test for the isolation of H-pylori from gastric secretions MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000090131200426 SO - Gut 2000 ;47():A118-A118 1997 UI - 15883 AU - Torres RM AU - Grosset C AU - Alary J AD - Univ Grenoble 1, Grp Etud Devenir Xenobiot Environm Gedexe, Lab Chim Analyt & Bromatol, UFR Pharm Grenoble, F-38706 La Tronche, FranceUniv Autonoma Estado Mexico, Fac Quim, Dept Posgrado, Toluca, MexicoGrosset, C, Univ Grenoble 1, Grp Etud Devenir Xenobiot Environm Gedexe, Lab Chim Analyt & Bromatol, UFR Pharm Grenoble, Domaine Merci, F-38706 La Tronche, France TI - Liquid chromatographic analysis of pentachloronitrobenzene and its metabolites in soils AB - The fungicide pentachloronitrobenzene (PCNB) was quantitatively determined by an LC isocratic method on a 5 mu m Adsorbosphere HS C-18 column (250 x 4.6 mm I.D.), with methanol-water (93:7, nu/nu) pH 3.5 as mobile phase (1 mL min(-1)) and UV detection at 301 nm. This method was applied to the determination of PCNB residues and two metabolites in soil. under different storage conditions. Extraction from soil was with an ethyl acetate-methhanol (90:10, nu/nu) mixture and clean-up on a basic alumina column flushed with hexane. Validation procedures for each step of the assay are described. Good recoveries were obtained, without interference (98.5 +/- 1.3 % for PCNB, 82.3 +/- 1.4 % for pentachloroaniline and 98.7 +/- 1.2 % for pentachlorothioanisole) MH - France MH - Mexico|Estado De Mexico PB - WIESBADEN: VIEWEG RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0009-5893 UR - ISI:000087621500002 L2 - column liquid chromatography;pentachloronitrobenzene and metabolites;soils;method validation;PESTICIDES SO - Chromatographia 2000 ;51(9-10):526-530 1998 UI - 15439 AU - Toschi F AU - Leveque E AU - Ruiz-Chavarria G AD - Univ Twente, Dept Appl Phys, NL-7500 AE Enschede, NetherlandsINFM, Unita Tor Vergata, Rome, ItalyEcole Normale Super Lyon, CNRS, Phys Lab, F-69364 Lyon 07, FranceNatl Autonomous Univ Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, MexicoToschi, F, Univ Twente, Dept Appl Phys, POB 217, NL-7500 AE Enschede, Netherlands TI - Shear effects in nonhomogeneous turbulence AB - Motivated by recent experimental and numerical results, a simple unifying picture of intermittency in turbulent shear flows is suggested. Integral structure functions (ISF), taking into account explicitly the shear intensity, are introduced on phenomenological grounds. ISF can exhibit a universal scaling behavior, independent of the shear intensity. This picture is in satisfactory agreement with both experimental and numerical data. Possible extension to convective turbulence and implication on closure conditions for large-eddy simulation of nonhomogeneous flows are briefly discussed MH - France MH - Italy MH - Mexico|Distrito Federal MH - Netherlands PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000088745100022 L2 - INTERMITTENCY SO - Physical Review Letters 2000 ;85(7):1436-1439 1999 UI - 14883 AU - Totosaus A AU - Gault NFS AU - Guerrero I AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol Bioquim Macromol, Mexico City 09340, DF, MexicoQueens Univ Belfast, Dept Food Sci Food Chem, Belfast BT9 5PX, Antrim, North IrelandTotosaus, A, Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol Bioquim Macromol, Apdo Postal 55-535, Mexico City 09340, DF, Mexico TI - Dynamic rheological behavior of meat proteins during acid-induced gelation AB - Glucono-delta -lactone (gdl) is used to promoting gelification of muscle proteins in restructured foods. Protein gelification can be achieved by lowering enough the pH to promote interactions between protein molecules. The gdl was added to a muscle extract (1.2 % w/w) at 4, 12, 20 and 28 degreesC and pH and rheological behavior were observed using a controlled stress rheometer. Changes in pH induced by gdl hydrolysis were more noticeable at 28 degreesC (final pH 4.40) than at 4 degreesC (final pH 5.02). The gdl hydrolysis rate depends on temperature, being lower at low temperature and increasing with temperature. This temperature influence on pH decrease was reflected on muscle protein gels viscoelastic behavior, where the proteins cross-linking were caused by the acidification, enough to form a gel structure. Maximum storage (G') and loss (G") modules were achieved at pH values between 4.5-5.5, near to myofrbrillar proteins isoelectric point. Samples presented a liquid-like behavior (G'>G") during the acid-induced gelation. Stronger gels were formed at high temperatures. At this point, loss of solubility and structure were caused by an excess of acid in the medium MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1094-2912 UR - ISI:000165336400012 L2 - MYOFIBRILLAR PROTEIN; CHILLED TEMPERATURES; MYOSIN; GELS; MILK SO - International Journal of Food Properties 2000 ;3(3):465-472 2000 UI - 15844 AU - Tovar CZ AU - Ballantine DL AD - Univ Puerto Rico, Dept Marine Sci, Mayaguez, PR 00681, USAUniv Autonoma Tamaulipas, Inst Ecol & Alimentos, Mexico City 87040, DF, MexicoBallantine, DL, Univ Puerto Rico, Dept Marine Sci, POB 9013, Mayaguez, PR 00681 USA TI - Multiple antimicrobial activities of the marine alga Spyridia filamentosa (Ceramiaceae, Rhodophyta) AB - Forty eight HPLC peaks from three distinct TLC zones obtained from crude lipid extracts of the tropical marine red alga Spyridia filamentosa were assayed against five pathogenic microorganisms. Of these, nineteen showed detectable activities (seven HPLC peaks from TLC zone 5; five peaks from TLC zone 9; seven peaks from TLC zone 12). Activities by single HPLC peaks were generally against one or two assay microorganisms. The total number of biologically active compounds in a given alga is shown to be substantially greater than can be ascertained by assaying whole-algal extracts MH - Mexico|Distrito Federal MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000087620200004 L2 - ANTIBACTERIAL ACTIVITY; EXTRACTS; METABOLITES SO - Botanica Marina 2000 ;43(3):233-238 2001 UI - 15570 AU - Tovmassian GH AU - Greiner J AU - Schwope AD AU - Szkody P AU - Schmidt G AU - Zickgraf FJ AU - Serrano A AU - Krautter J AU - Thiering I AU - Zharikov SV AD - Natl Autonomous Univ Mexico, Inst Astron, Observ Astron Nacl, Mexico City 04510, DF, MexicoAstrophys Inst Potsdam, Potsdam, GermanyUniv Washington, Dept Astron, Seattle, WA 98195, USAUniv Arizona, Steward Observ, Tucson, AZ 85721, USAObserv Astron Strasbourg, Strasbourg, FranceInst Nacl Astrofis Opt & Elect, Puebla, MexicoLandessternwarte Konigstuhl, D-69117 Heidelberg, GermanySpecial Astron Observ, Nizhni Arkhyz 357147, RussiaTovmassian, GH, Natl Autonomous Univ Mexico, Inst Astron, Observ Astron Nacl, Mexico City 04510, DF, Mexico TI - The new long-period AM Herculis system RX J2157.5+0855 AB - The identification and study of the optical counterpart of the ROSAT-discovered AM Her system RX J2157.5+0855 is reported. We present high time-resolution spectrophotometric, spectropolarimetric, and multicolor CCD-photometric observations of this polar obtained when the system was actively accreting. The 3.375 hr orbital period of the system places it among a few long-period AM Her objects. The emission lines clearly reveal the presence of at least two different line components with different widths and radial velocity variations. The Balmer emission lines contain significant contribution from the X/UV-illuminated hemisphere of the secondary star. The Ha line is deblended into two components, which we identify with the secondary star and the accretion stream. The circular polarization unambiguously confirms the magnetic nature of this newly discovered cataclysmic variable with approximate to 20 MG strength deduced by cyclotron emission modeling. Combining radial velocity and light curves with polarization variations provides additional information about the system geometry MH - France MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Russia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000088451100034 L2 - accretion, accretion disks;binaries : eclipsing;novae, cataclysmic variables;stars : individual (RX J2157.5+0855);stars : magnetic fields;X-rays : stars;MAGNETIC ACCRETION COLUMNS; POLARIZATION PROPERTIES; BINARIES; TOMOGRAPHY SO - Astrophysical Journal 2000 ;537(2):927-935 2002 UI - 15528 AU - Trager SC AU - Faber SM AU - Worthey G AU - Gonzalez JJ AD - Observ Carnegie Inst Washington, Pasadena, CA 91106, USAUniv Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064, USAUniv Calif Santa Cruz, Board Studies Astron & Astrophys, Santa Cruz, CA 95064, USASt Ambrose Univ, Dept Phys & Astron, Davenport, IA 52803, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoTrager, SC, Observ Carnegie Inst Washington, 813 Santa Barbara St, Pasadena, CA 91106 USA TI - The stellar population histories of early-type galaxies. II. Controlling parameters of the stellar populations AB - This paper analyzes single stellar population (SSP)-equivalent parameters for 50 local elliptical galaxies as a function of their structural parameters. The galaxy sample is drawn from the high-quality spectroscopic surveys of Gonzalez (1993) and Kuntschner (1998). The basic data are central values of SSP-equivalent ages, t, metallicities, [Z/H], and "enhancement" ratios, [E/Fe], derived in Paper I, together with global structural parameters including velocity dispersions, radii, surface brightnesses, masses, and luminosities. The galaxies fill a two-dimensional plane in the four-dimensional space of [Z/H], log t, log sigma, and [E/Fe]. SSP age, t, and velocity dispersion, sigma, can be taken as the two independent parameters that specify galaxy's location in this "hyperplane." The hyperplane can be decomposed into two subrelations: (1) a "Z-plane," in which [Z/H] is a linear function of logo and logt and (2) a relation between [E/Fe] and sigma in which [E/Fe] is larger in high-sigma galaxies. Velocity dispersion is the only structural parameter that is found to modulate the stellar populations; adding other structural variables such as I-e or r(e) does not predict [Z/H] or [E/Fe] more accurately. Cluster and field ellipticals follow the same hyperplane, but their (sigma, t) distributions within it differ. Most Fornax and Virgo cluster galaxies are old, with a only a small sprinkling of galaxies to younger ages. The field ellipticals span a larger range in SSP age, with a tendency for lower sigma galaxies to be younger. The present sample thus suggests that the distribution of local ellipticals in the (sigma, t) plane may depend on environment. Since the (sigma, t) distribution affects all two-dimensional projections involving SSP parameters, many of the familiar scaling laws attributed to ellipticals may also depend on environment. Some evidence for this is seen in the current sample. For example, only Fornax ellipticals show the classic mass-metallicity relation, whereas other subsamples do not. The tight Mg-sigma relations of these ellipticals can be understood as two-dimensional projections of the metallicity hyperplane showing it edge-on. At fixed sigma, young age tends to be offset by high [Z/H], preserving Mg nearly constant. The tightness of the Mg-sigma relations does not necessarily imply a narrow range of ages at fixed sigma. Although SSP parameters are heavily weighted by young stars, modeling them still places tight constraints on the total star formation history of elliptical galaxies. The relation between [E/Fe] and sigma is consistent with a higher effective yield of Type II SNe elements at higher sigma. This might occur if the IMF is enhanced in massive stars at high sigma, or if more SNe II-enriched gas is retained by deeper galactic potential wells. Either way, modulating Type II yields versus sigma seems to fit the data better than modulating Type Ia yields. The Z-plane is harder to explain and may be a powerful clue to star formation in elliptical galaxies if it proves to be general. Present data favor a "frosting" model in which low apparent SSP ages are produced by adding a small frosting of younger stars to an older "base" population (assuming no change in sigma). If the frosting abundances are close to or slightly greater than the base population, simple two-component models run along lines of constant sigma in the Z-plane, as required. This favors star formation from well-mixed pre-enriched gas rather than unmixed low-metallicity gas from an accreted object MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 202 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000088585900012 L2 - galaxies : abundances;galaxies : elliptical and lenticular, cD;galaxies : evolution;galaxies : formation;galaxies : stellar content;DYNAMICALLY HOT GALAXIES; ENHANCED GALACTIC WINDS; CCD SURFACE PHOTOMETRY; ELLIPTIC GALAXIES; DARK-MATTER; INFRARED PHOTOMETRY; LINE STRENGTHS; STAR-FORMATION; FINE-STRUCTURE; EVOLUTION SO - Astronomical Journal 2000 ;120(1):165-188 2003 UI - 16174 AU - Trager SC AU - Faber SM AU - Worthey G AU - Gonzalez JJ AD - Observ Carnegie Inst Washington, Pasadena, CA 91106, USAUniv Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064, USAUniv Calif Santa Cruz, Board Studies Astron & Astrophys, Santa Cruz, CA 95064, USASt Ambrose Univ, Dept Phys & Astrophys, Davenport, IA 52803, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoTrager, SC, Observ Carnegie Inst Washington, 813 Santa Barbara St, Pasadena, CA 91106 USA TI - The stellar population histories of local early-type galaxies. I. Population parameters AB - This paper commences a series of investigations into the stellar populations of local elliptical galaxies as determined from their integrated spectra. The goal of the series is to determine the star formation and chemical evolution histories of present-day elliptical galaxies. The primary galaxy sample analyzed is that of Gonzalez, which consists of 39 elliptical galaxies drawn primarily from the local field and nearby groups, plus the bulge of Messier 31. Single-burst stellar population (SSP)-equivalent ages, metallicities, and abundance ratios are derived from H beta, Mg b, and [Fe] line strengths using an extension of the Worthey models that incorporates nonsolar line-strength "response functions" by Tripicco & Bell. These functions account for changes in the Lick/IDS indices caused by nonsolar abundance ratios, allowing us to correct the Worthey models for the enhancements of Mg and other alpha-like elements relative to the Fe-peak elements. SSP-equivalent ages of the Gonzalez elliptical galaxies are found to vary widely, 1.5 Gyr less than or similar to t less than or similar to 18 Gyr, while metallicities [Z/H] and enhancement ratios [E/Fe] are strongly peaked around [[Z/H]] = +0.26 and [[E/Fe]] = +0.20 (in an aperture of radius r(e)/8). The enhancement ratios [E/Fe] are milder than previous estimates because of the application of nonsolar abundance corrections to both Mg b and [Fe] for the first time. While [E/Fe] is usually greater than zero, it is not the "E" elements that are actually enhanced but rather the Fe-peak elements that are depressed; this serves not only to weaken [Fe] but also to strengthen Mg b, accounting for the overall generally mild enhancements. Based on index strengths from the Lick/IDS galaxy library (Trager et al.), C is not depressed with Fe but rather seems to be on a par with other elements such as Mg in the E group. Gradients in stellar populations within galaxies are found to be mild, with SSP-equivalent age increasing by 25%, metallicity decreasing by [[Z/H]] = 0.20 dex, and [E/Fe] remaining nearly constant out to an aperture of radius r(e)/2 for nearly all systems. Our ages have an overall zero-point uncertainty of at least similar to 25% because of uncertainties in the stellar evolution prescription, the oxygen abundance, the effect of [E/Fe] not equal 0 on the isochrones, and other unknowns. However, the relative age rankings of stellar populations should be largely unaffected by these errors. In particular, the large spread in ages appears to be real and cannot be explained by contamination of H beta by blue stragglers or hot horizontal-branch stars, or by fill-in of H beta by emission. Correlations between these derived SSP-equivalent parameters and other galaxy observables will be discussed in future papers MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 225 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000086508100011 L2 - galaxies : abundances;galaxies : elliptical and lenticular, cD;galaxies : evolution;galaxies : stellar content;GALACTIC GLOBULAR-CLUSTERS; LINE-STRENGTH GRADIENTS; ELLIPTIC GALAXIES; THEORETICAL ISOCHRONES; ABUNDANCE RATIOS; STROMGREN PHOTOMETRY; CHEMICAL EVOLUTION; INTEGRATED SPECTRA; BLUE STRAGGLERS; BAADES WINDOW SO - Astronomical Journal 2000 ;119(4):1645-1676 2004 UI - 15044 AU - Trejo-Becerril C AU - Sarmiento RG AU - Abad MM AU - Ichaso N AU - Delgado R AU - Cruz JJ AU - Duenas-Gonzalez A AD - Inst Nacl Cancerol, Subdirecc Invest Basica, Mexico City 14000, DF, MexicoUniv Salamanca, Univ Hosp, Fac Med, Mol Genet Unit, Salamanca, SpainUniv Salamanca, Univ Hosp, Dept Oncol, Salamanca, SpainUNAM, Inst Invest Biomed, Dept Genet & Environm Toxicol, Mexico City, DF, MexicoDuenas-Gonzalez, A, Inst Nacl Cancerol, Subdirecc Invest Basica, San Fernando 22, Mexico City 14000, DF, Mexico TI - Immunohistochemical expression of p53 in breast carcinoma is associated with the intron 1 BglII polymorphism of the p53 gene AB - Breast carcinoma is a public health problem worldwide. It is known that both genetic and environmental factors are important for breast carcinogenesis and that structural and/or functional alterations at p53 gene are commonly observed in breast tumors. In addition, polymorphisms of several genes in either their coding or non-coding sequences have been found related to cancer risk and/or clinicopathological characteristics of tumors. In this study we have evaluated the intron 1 BglII polymorphism of the p53 gene with a PCR-based approach in 117 cases of breast cancer and 102 healthy women and its association with the immunohistochemical expression of p53 in the tumors. The results showed that the presence of the polymorphism (allele 2) is highly associated with the tumor expression of p53 (p<0.0001) and that there is a trend for increased frequency of allele 2 in cases than in controls (p=0.2376). These data suggest that the germ-line variation in the intron 1 of the p53 gene could produce functional or structural changes of the protein that is reflected by its abnormal expression. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0027-5107 UR - ISI:000089963400009 L2 - breast cancer;p53;polymorphism;immunohistochemistry;LUNG-CANCER; HAPLOTYPES; TP53 SO - Mutation Research-Fundamental and Molecular Mechanisms of Mutagenesis 2000 ;452(2):231-236 2005 UI - 16486 AU - Trejo-O'Reilly JA AU - Cavaille JY AU - Paillet M AU - Gandini A AU - Herrera-Franco P AU - Cauich J AD - UJF, CERMAV, CNRS, F-38041 Grenoble 9, FranceINPG, Ecole Francaise Papeterie & Ind Graph, F-38402 St Martin Dheres, FranceTrejo-O'Reilly, JA, Ctr Invest & Desarrollo Tecnol, Av De los Sauces 3A,Parque Ind, Lerma, Edo De Mexico, Mexico TI - Interfacial properties of regenerated cellulose fiber/polystyrene composite materials. Effect of the coupling agent's structure on the micromechanical behavior AB - The interfacial properties of polystyrene/regenerate cellulose fiber composite materials are characterized using micromechanical tests such as the single fiber fragmentation and microbond ("microdrop test"). The cellulose fibers were grafted with different copolymers of different chemical structures as well as different molar masses ranging from 300 to 18,000 (ASA, jeffisocyanate, commercial poly(styrene-co-maleic anhydride) and "home-made" poly(styrene-co-TMI)). The two polystyrene based copolymers have been shown to be miscible with polystyrene. It was found that the higher improvement of the interfacial shear strength was obtained when the fiber is grafted with the higher molecular weight, i.e., the poly(styrene-co-TMI) MH - France MH - Mexico|Estado De Mexico PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Composites;Polymer Science U5 - J;Article AV - English IS - 0272-8397 UR - ISI:000085363700007 L2 - PULL-OUT TEST; MECHANICAL-PROPERTIES; FIBER; ADHESION; MATRIX; MICROBOND SO - Polymer Composites 2000 ;21(1):65-71 2006 UI - 15386 AU - Tresguerres R AU - Mielke EW AD - CSIC, IMAFF, Madrid 28006, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoTresguerres, R, CSIC, IMAFF, Serrano 113 Bis, Madrid 28006, Spain TI - Gravitational Goldstone fields from affine gauge theory AB - In order to facilitate the application of standard renormalization techniques, gravitation should be described, in the pure connection formalism, as a Yang-Mills theory of a certain spacetime group, say the Poincare or the affine group. This embodies the translational as well as the linear connection. However, the coframe is not the standard Yang-Mills-type gauge field of the translations, since it lacks the inhomogeneous gradient term in the gauge transformations. By explicitly restoring this "hidden" piece within the framework of nonlinear realizations, the usual geometrical interpretation of the dynamical theory becomes possible, and in addition one can avoid the metric or coframe degeneracy which would otherwise interfere with the integrations within the path integral. We claim that nonlinear realizations provide the general mathematical scheme for the foundation of gauge theories of spacetime symmetries. When applied to construct the Yang-Mills theory of the affine group, tetrads become identified with nonlinear translational connections; the anholonomic metric no longer constitutes an independent gravitational potential, since its degrees of freedom reveal a correspondence to eliminateable Goldstone bosons. This may be an important advantage for quantization MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000088793100046 L2 - COSMOLOGICAL CONSTANT PROBLEM; GENERAL-RELATIVITY; SCALE-INVARIANCE; QUANTUM-GRAVITY; POINCARE GROUP; GROUP MANIFOLD; VACUUM ENERGY; SPACE-TIME; SIGNATURE; SUPERGRAVITY SO - Physical Review D 2000 ;62(4): 2007 UI - 15787 AU - Trevino C AU - Mendez F AU - Prince JC AU - Higuera FJ AD - Univ Politecn Madrid, ETSI Aeronaut, E-28040 Madrid, SpainNatl Autonomous Univ Mexico, Fac Ingn, Mexico City 04510, DF, MexicoDept Met Mecan, Inst Tecnol Veracruz, Veracruz 91868, MexicoTrevino, C, Univ Politecn Madrid, ETSI Aeronaut, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain TI - Effect of longitudinal heat conduction on the catalytic ignition of carbon monoxide in a boundary layer AB - The catalytic ignition of dry carbon monoxide and air in a boundary layer flow over a palladium plate is studied in this paper. The heterogeneous reaction mechanism is modelled with the dissociative adsorption of the molecular oxygen and the non-dissociative adsorption of CO, together with a surface reaction of the Langmuir-Hinshelwood type and the desorption reaction of the adsorbed product, CO2(s). The critical condition for catalytic ignition, represented by the ignition Damkohler number, has been deduced using high activation energy asymptotics of the desorption kinetics of the most efficiently adsorbed reactant, CO(s). Longitudinal heat conduction along the plate has been considered and its influence on the ignition temperature has been evaluated. This influence is rather weak, indicating that the flat plate boundary layer flow configuration is a robust device to determine the critical conditions for catalytic ignition MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Energy & Fuels;Engineering, Chemical;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 1364-7830 UR - ISI:000087816000006 L2 - STAGNATION-POINT FLOW; FLAT-PLATE; PLATINUM; FUEL SO - Combustion Theory and Modelling 2000 ;4(2):173-187 2008 UI - 16118 AU - Trinidad JFM AU - Schulcloper JR AU - Cortes MSL AD - IPN, Lab Procesamiento Imagenes, Ctr Invest Computac, Unidad Profes Adolfo Lopez Mateos, Mexico City 07738, DF, MexicoCITMA, Inst Cibernet Matemat & Fis, La Habana, CubaIPN, Ctr Invest & Estudios Avanzados, Mexico City 07738, DF, MexicoSchulcloper, JR, IPN, Lab Procesamiento Imagenes, Ctr Invest Computac, Unidad Profes Adolfo Lopez Mateos, Ave Jaun Dios Batiz Esq Con Miguel Othon Mendizab, Mexico City 07738, DF, Mexico TI - Structuralization of universes AB - In this work a new set of clustering criteria for the structuralization of universes in the logical combinatory approach of the Pattern Recognition Theory is introduced. The criteria are considered for classical partitions and covers fuzzy classes as well. The existing relationships between these criteria are studied. An example of an application of the criteria introduced herein is also included. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Theory & Methods;Mathematics, Applied;Statistics & Probability U5 - J;Article AV - English IS - 0165-0114 UR - ISI:000086639800009 L2 - cluster analysis;pattern recognition;crisp clustering criterion;fuzzy clustering criterion;unsupervised classification;logical combinatorial approach SO - Fuzzy Sets and Systems 2000 ;112(3):485-500 2009 UI - 15680 AU - Tritlla J AU - onso-Azcarate J AU - Bottrell SH AD - Natl Autonomous Univ Mexico, Circuito Invest Cient, Inst Geol, Dept Geoquim, Mexico City 04510, DF, MexicoUniv Leeds, Sch Earth Sci, Leeds LSJ 9JT, W Yorkshire, EnglandUniv Castilla La Mancha, Fac Ciencias Medio Ambiente Fabr Armas, Toledo, SpainTritlla, J, Natl Autonomous Univ Mexico, Circuito Invest Cient, Inst Geol, Dept Geoquim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Molten sulphur-dominated fluids in the origin of a native sulphur mineralization in lacustrine evaporites from Cervera del Rio Alhama (Cameros Basin, NE Spain) AB - During the regional and petrologic study of the Cameros Basin, vein deposits containing native sulphur, gypsum, quartz and rare sphalerite were found enclosed in lacustrine evaporites. The fluid inclusion study of the coeval quartz crystals revealed that the aqueous fluids were extremely scarce during vein formation. Surprisingly, die textural study, microthermometry and qualitative Raman analyses of these inclusions proved that the main fluid-trapped during vein formation was a mixture of molten sulphur and volatiles (N-2, CO2 and H2S). As far as we know, this is the first time that an almost pure sulphur-bearing fluid is described to occur in sulphur deposits. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000088104900034 L2 - gypsum;sulphur;fluid inclusions;evaporites;thermochemical reduction;low-grade metamorphism;Cameros Basin SO - Journal of Geochemical Exploration 2000 ;69():183-187 2010 UI - 15435 AU - Trjapitzin VA AU - Ruiz-Cancino E AD - UAT, UAM Agron & Ciencias, Cd Victoria 87149, Tam, MexicoRussian Acad Sci, Inst Zool, St Petersburg 199034, RussiaTrjapitzin, VA, UAT, UAM Agron & Ciencias, Cd Victoria 87149, Tam, Mexico TI - Anagyrus pulchricornis (Howard) (Hymenoptera : Encyrtidae) in the state of Tamaulipas, Mexico MH - Mexico|Tamaulipas MH - Russia PB - DALLAS: SOUTHWESTERN ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0147-1724 UR - ISI:000088755300010 SO - Southwestern Entomologist 2000 ;25(2):149-149 2011 UI - 16092 AU - Trombetta M AU - Alejandre AG AU - Solis JR AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyNatl Autonomous Univ Mexico, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, MexicoBusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, Ple JF Kennedy, I-16129 Genoa, Italy TI - An FT-IR study of the reactivity of hydrocarbons on the acid sites of HZSM5 zeolite AB - The interaction of HZSM5 zeolite with n-butane, iso-butane, n-heptane, 1-butene, cis-2-butene, trans-2-butene, iso-butene, benzene and toluene in the temperature range 100-773 K has been investigated using FT-IR spectroscopy Low temperature experiments allowed to characterise hydrogen-bonded species of all adsorbates both with the internal bridging OHs of HZSM5 and with the external terminal OHs. H-bonds apparently involve C-C sigma-type orbitals of alkanes and C=C pi-type orbitals of alkenes and aromatics. Evidence is provided for a partial steric hindrance in the interaction of benzene and toluene with the internal OHs. Hydrogen bondings with alkanes are precursors for dehydrogenation with the formation of carbenium ions that go fast towards the tert-butyl-sec-butyl equilibrium, giving rise to skeletal isomerization and cracking. Poly-isobutene like species are formed at the surface by high-temperature interaction with both alkanes and alkenes. Isobutene is a likely precursor for such species, that are intermediates of coking and can contribute also to cracking to light olefins. H-bonded species are also thought to be intermediates for the formation of the so-called 'sigma-bonded' intermediate of electrophilic aromatic substitution, giving rise to toluene dealkylation and/or dismutation, obtained in the IR cell. (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000086809600009 L2 - FT-IR study;reactivity of hydrocarbons;acid sites;HZSM5 zeolite;aromatics;butenes;butanes;heptane;SKELETAL ISOMERIZATION; FORCE-FIELD; ZSM-5; ACTIVATION; CATALYSTS; SPECTRA; ALKANES; BONDS SO - Applied Catalysis A-General 2000 ;198(1-2):81-93 2012 UI - 16663 AU - Trombetta M AU - Armaroli T AU - Alejandre AG AU - Solis JR AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyNatl Autonomous Univ Mexico, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, MexicoBusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, P JF Kennedy, I-16129 Genoa, Italy TI - An FT-IR study of the internal and external surfaces of HZSM5 zeolite AB - The interaction of HZSM5 zeolite with n-butane, iso-butane, n-heptane, 1-butene, cis-2-butene, trans-2-butene, iso-butene, benzene, toluene, ortho-xylene, para-xylene, acetonitrile and pivalonitrile has been investigated using FT-IR spectroscopy. These experiments allowed to characterize the hydrogen-bonded species of all adsorbates both with the internal OHs of HZSM5 and with the external OHs. ortho-Xylene and pivalonitrile are unable to enter the zeolite cavities in the given conditions, so that they only interact with the external sites. The other molecules interact with both internal and external sites. However, it is clear that the hindered aromatic molecules do not fully reach the internal sites, part of them being unperturbed. H-bonds apparently involve C-C sigma-type orbitals of alkanes and C=C pi-type orbitals of alkenes and aromatics. The external OHs of ZSM5 are clearly associated with a band near 3746 cm(-1), so are certainly terminal. In spite of being terminal, at least part of them are significantly acidic too, nearly like those of silica/aluminas and definitely more than the silanols of pure silica. The internal OHs (3618 cm(-1)) are more acidic and bridging. Internal defects are characterized by terminal silanols absorbing at 3730 cm(-1). (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 49 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000084664600013 L2 - HZSM5 zeolite;FT-IR spectroscopy;internal surface;external surface;SKELETAL ISOMERIZATION CATALYSIS; SPECTROSCOPIC CHARACTERIZATION; AB-INITIO; ACIDITY; ADSORPTION; SILICALITE; ZSM-5; ACETONITRILE; MOLECULES; COMPLEXES SO - Applied Catalysis A-General 2000 ;192(1):125-136 2013 UI - 14462 AU - Tulyaganov D AU - Vargas G AU - Mendez J AU - Tukhtaev M AU - Johal K AD - CINVESTAV, Dept Ceram Engn, Saltillo, Coahuila, MexicoInst Chem Technol, Tashkent, UzbekistanCIQA, Dept Biopolimers, Mexico City, DF, MexicoTulyaganov, D, CINVESTAV, Dept Ceram Engn, Saltillo, Coahuila, Mexico TI - Cordierite ceramic synthesis via crystallisation of alkaline-poor aluminosilicate glass AB - This study represents an attempt to conduct cordierite ceramic synthesis via crystallisation of an alkaline-poor aluminosilicate glass. For this purpose, several glass compositions were prepared and analysed. Glass powder wet cyclone concentrated kaolin, alumina and magnesite were used as raw materials. The sintering process took place actively between 1200-1300 degreesC and ended at 1280-1350 degreesC. The final firing temperature value was inversely proportional to the glass powder contained in the initial composition. Dense and porous ceramics of cordierite structure were produced based on a new process MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Uzbekistan PB - FRANKFURT: VERLAG DEUTSCHEN GLASTECHNISCHEN RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0946-7475 UR - ISI:000166608300007 SO - Glass Science and Technology-Glastechnische Berichte 2000 ;73():36-42 2014 UI - 16602 AU - Tutino M AU - Chico F AU - Tutino M AU - Goodrich JT AU - Monasterio FO AD - Univ Palermo, Ctr Craniofacial Disorders Head & Neck Surg & Neu, I-90144 Palermo, ItalyHosp Infantil Mexico, Dept Pediat Neurosurg, Mexico City, DF, MexicoUniv Messina, Dept Neurosurg, I-98100 Messina, ItalyAlbert Einstein Coll Med, Montefiore Med Ctr, Coll Med,Div Pediat Neurosurg, Leo Davidoff Dept Neurol Surg, New York, NY, USATutino, M, Univ Palermo, Ctr Craniofacial Disorders Head & Neck Surg & Neu, Viale Alpi 36, I-90144 Palermo, Italy TI - Endoscopic intracranial craniofacial and monobloc osteotomies with the aid of a malleable high-speed pneumatic drill: A cadaveric and clinical study AB - Endoscopic techniques are now an accepted part of the surgical armamentarium and are used routinely in a number of aesthetic and reconstructive procedures. Endoscopic techniques are now being used commonly by plastic surgeons in forehead and face lifts. In both craniofacial surgery and in neurosurgery, the application of endoscopy potentially allows the surgical team to perform wide dissection of the dura mater in a minimally invasive fashion, thereby potentially reducing the risk of dural and brain injury. Also reduced by this surgical approach is potential injury to the major venous structures, such as the sagittal sinus, along with overall reduced bleeding. After an extensive laboratory study of 10 cadaveric dissections, the authors have refined a new endoscopic technique for completing an endoscopic intracranial craniofacial osteotomy. This study was conducted in the Department of Pathology at the University of Brno (Czech Republic), and was performed as a cooperative multicenter project between the University of Palermo, the Albert Einstein College of Medicine/Montefiore Medical Center, the Hospital Infantil de Mexico, "Federico Gomez," and the Medtronic Midas Rex Institute, (Fort Worth, TX). During this cadaveric anatomic study and using small trephinations and skin incisions the authors were able to develop several different craniofacial and endoscopic monobloc procedures. To accomplish intracranial and facial osteotomies, a new malleable high-speed drill was designed for use in the endoscopic craniofacial approach. Using these newly developed cadaveric techniques and instrumentation, the authors performed two intracranial craniofacial procedures on children with congenital craniofacial anomalies. There would appear to be several significant advantages for the craniofacial patient as result of these new techniques: reduced surgical trauma, operative bleeding, surgical time, and hospitalization, along with a reduced risk of infection. It became quickly apparent, as a result of these cadaveric studies, that the learning curve for this endoscopic procedure is quite steep MH - Italy MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Surgery U5 - J;Article AV - English IS - 0148-7043 UR - ISI:000085032000001 L2 - LIFT SO - Annals of Plastic Surgery 2000 ;44(1):1-7 2015 UI - 16569 AU - Tytgat J AU - Chandy KG AU - Garcia ML AU - Gutman GA AU - Martin-Eauclaire MF AU - van der Walt JJ AU - Possani LD AD - Katholieke Univ Leuven, Louvain, BelgiumUniv Calif Irvine, Irvine, CA, USAMerck Res Labs, Rahway, NJ, USAUniv Mediterranee, Marseille, FrancePotchefstroom Univ Christian Higher Educ, ZA-2520 Potchefstroom, South AfricaUNAM, Cuernavaca, Morelos, Mexico TI - A unified nomenclature for short chain peptides isolated from scorpion venom: alpha-KTx molecular subfamilies MH - Belgium MH - France MH - Mexico|Morelos MH - South Africa MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779301005 SO - Biophysical Journal 2000 ;78(1):172A-172A 2016 UI - 15403 AU - Uc VH AU - Garcia-Cruz I AU - Hernandez-Laguna A AU - Vivier-Bunge A AD - CSIC, Estac Expt Zaidin, E-18008 Granada, SpainInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoVivier-Bunge, A, CSIC, Estac Expt Zaidin, C Prof Albareda N1, E-18008 Granada, Spain TI - New channels in the reaction mechanism of the atmospheric oxidation of toluene AB - Two different theoretical approaches are used to study the OH radical attack on toluene: the Molleer-Plesset perturbation theory and the B3LYP density functional method. The critical points of the potential energy surface for the OH addition to toluene are determined, and rate-equilibrium relationships are discussed. A stable structure corresponding to a prereactive complex which is formed when the OH radical is at about 2.5 Angstrom from toluene is obtained. The existence of this loosely bound system is necessary to explain the experimentally observed negative activation energy. The geometry of transition states and products are determined for addition at different positions in the ring, including the ipso position, which has not been considered in previous works. Energy results at the MP4 and coupled cluster levels calculated at the optimized MP2 and B3LYP geometries confirm that the ipso adduct is more stable than the ortho adduct by about 0.5 kcal/mol. Several routes are proposed for the subsequent reactions of the ipso adduct, which could explain the very high yield of o-cresol with respect to the other cresol isomers MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000088947900016 L2 - AROMATIC-HYDROCARBONS; ORTHO-XYLENE; OH-RADICALS; PHOTOOXIDATIONS; PRODUCTS; KINETICS SO - Journal of Physical Chemistry A 2000 ;104(33):7847-7855 2017 UI - 14300 AU - Uraev AI AU - Vlasenko VG AU - Kharisov BI AU - Blanco LM AU - Shuvaev AT AU - Vasilchenko IS AU - Garnovskii AD AU - Elizondo NV AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas De Los Garza 66450, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Fac Fisicomatemat, San Nicolas De Los Garza 66450, Nuevo Leon, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov On Don 344090, RussiaRostov State Univ, Inst Phys, Rostov On Don 344090, RussiaKharisov, BI, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Apdo Postal 18-F,Ciudad Univ, San Nicolas De Los Garza 66450, Nuevo Leon, Mexico TI - Synthesis and EXAFS investigation of azomethynic copper metallochelates with an N,S,O ligand environment AB - Neutral copper complex of different composition (CuL21 and CuL (OAc)-O-2) and structure were obtained by coupling the 1-phenyl(isopropyl)-3-methyl-4-(N-substituted)aldimino-5-oxy(thio,seleno )pyrazoles (HL1), and 2-hydroxy(tosylamino)-N-(8-quinolyl)benzaldimine (HL2) with copper(II) acetate. According to X-ray structural data, the CuL21 complexes possess the pseudotetrahedral structure, and the (CuLOAc)-O-2 complexes, the square-pyramidal one. The complexes were studied by EXAFS spectroscopy. EXAFS spectral data on the nearest ligand environment show a good correlation with the X-ray structural results. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000166064800017 L2 - synthesis;EXAFS investigation;azomethynic copper metallochelates;SULFUR-CONTAINING LIGANDS; MOLECULAR-STRUCTURE; COORDINATION CHEMISTRY; COMPLEXES; PROTEINS; CRYSTAL; 2-AMINO-1-CYCLOPENTENEDITHIOCARBOXYLATO)>COPPER(II); SYSTEMS; SPECTRA; MODELS SO - Polyhedron 2000 ;19(22-23):2361-2366 2018 UI - 16020 AU - Urena AU - De Salazar JMG AU - Gil L AU - Rodrigo P AU - Martinez EE AU - Baldonedo JL AU - Criado E AD - Univ Complutense Madrid, Fac CC Quim, Dept Ciencia Mat & Ingn Met, Madrid, SpainNatl Autonomous Univ Mexico, Inst Invest Mat, Dept Mat Met & Ceram, Mexico City, DF, MexicoUniv Complutense Madrid, Ctr Microscopia Luis Bru, Madrid, SpainCSIC, Inst Ceram & Vidrio, Madrid, SpainUrena, Univ Complutense Madrid, Fac CC Quim, Dept Ciencia Mat & Ingn Met, Madrid, Spain TI - Study on the reactivity between aluminium alloys and SiC particles AB - The SiC reinforcement particles react with the molten aluminium to form Al4C3 that is brittle and sensitive to the the humidity. This reaction degrades the properties of the SIC reinforced aluminium matrix composites. The extend of the reaction in the Al/SiC interface depends on the fabrication parameters such as the temperature, residence time, atmosphere and chemical composition of the aluminium matrix and the reinforcement. Systematic studies on the reactivity between the SiC particles and molten aluminium alloys have been performed, analysing the effect of the presence of a SiO2 layer, which was formed by oxidation on the ceramic particles before their incorporation into the melt, as a protective barrier for preventing the attack of the SiC. As well, the effect of the metal matrix composition on the interfacial reactivity has been studied employing different aluminium alloys: AA1070 (99,7% Al), A-319.0 (Al-6Si-3Cu) and A-332.0 (Al-11Si-1,5Cu). The composites were prepared by mixture of SiC particles (30% vol. %), cold pressure and fusion at 900 degrees C, varying the residence time in the furnace, which simulated a cast fabrication process. The results are compared with. those obtained for a metal matrix composite (AA2014/SiC/13p) MH - Mexico|Distrito Federal MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000087023500007 L2 - SiC;particles;aluminum;composites;reactivity;oxide barrier;COMPOSITES; AL4C3 SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2000 ;39(2):243-250 2019 UI - 15970 AU - Uribe-Ramirez AR AU - Korchinsky WJ AD - UMIST, Dept Chem Engn, Manchester M60 1QD, Lancs, EnglandUniv Guanajuato, Fac Quim, Guanajuato, GTO, MexicoKorchinsky, WJ, UMIST, Dept Chem Engn, POB 88, Manchester M60 1QD, Lancs, England TI - Fundamental theory for prediction of single-component mass transfer in liquid drops at intermediate Reynolds numbers (10 <= Re <= 250) AB - The rate of transfer of a solute between a single drop, rising or falling at intermediate drop Reynolds numbers (10 less than or equal to Re less than or equal to 250), and a continuous liquid phase, has been predicted by the solution of the fundamental fluid flow and mass transfer equations. The equations of motion are satisfied by use of the method of weighted residuals, assuming particular forms of the stream functions for both phases. The derived velocity profiles are then simplified for the region near the drop interface and introduced into the diffusion equation. This is solved analytically, after simplification, by a transformation of variables to a form that applies only for short distances on either side of the drop surface. Concentration profiles and mass transfer coefficients for both phases are obtained in the form of analytical expressions. Predicted values of the bulk concentrations in the dispersed phase and mass transfer coefficients compare favourably with available experimental data, though the latter were unreliable. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0009-2509 UR - ISI:000087248400020 L2 - mass transfer;spherical drops;liquid extraction;Navier-Stokes;diffusion equation SO - Chemical Engineering Science 2000 ;55(16):3305-3318 2020 UI - 15971 AU - Uribe-Ramirez AR AU - Korchinsky WJ AD - UMIST, Dept Chem Engn, Manchester M60 1QD, Lancs, EnglandUniv Guanajuato, Fac Quim, Guanajuato, Gto, MexicoKorchinsky, WJ, UMIST, Dept Chem Engn, POB 88, Manchester M60 1QD, Lancs, England TI - Fundamental theory for prediction of multicomponent mass transfer in single-liquid drops at intermediate Reynolds numbers (10 <= Re <= 250) AB - A solution of the problem of low flux, multicomponent, mass transfer in single, circulating liquid drops is presented in this work. The prediction from fundamental theory of single-component mass transfer for drops travelling at intermediate Reynolds numbers (10 less than or equal to Re less than or equal to 250), reported by the authors (Uribe-Ramirez & Korchinsky (2000) Chemical Engineering Science, in press), is extended to the case of several solutes transferring simultaneously. The same limitations of the previous paper apply here. These include (i) the neglect of the mass transfer occurring in the wake, (ii) that mass transfer during drop formation will previously have been accounted for, and (iii) that complete mixing occurs beyond the narrow boundary layer adjacent to the drop surface. The multicomponent diffusion equation, with velocities estimated as for the single component transfer case, is uncoupled using the linearized theory of Toor (1964a, b) and Stewart and Prober (1964). Each of the uncoupled differential equations is then solved, using a transformation of variables, for the pseudo-concentration profiles near the boundary in both phases, and for the bulk solute concentration changes in the drop. Multicomponent mass transfer coefficients are also calculated. Results for the quaternary system, toluene-acetone-acetaldehyde-water, are predicted to illustrate the application of the theory. Experimental data are required to check predictions. (C) 2000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0009-2509 UR - ISI:000087248400021 L2 - multicomponent mass transfer;Maxwell-Stefan;spherical drops;liquid extraction SO - Chemical Engineering Science 2000 ;55(16):3319-3328 2021 UI - 15309 AU - Uribe MCA AU - Guillette LJ AD - Univ Florida, Dept Zool, Gainesville, FL 32611, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Lab Biol Reprod Anim, Mexico City 04510, DF, MexicoGuillette, LJ, Univ Florida, Dept Zool, 223 Bartram Hall,POB 118525, Gainesville, FL 32611 USA TI - Oogenesis and ovarian histology of the American alligator Alligator mississippiensis AB - Although folliculogenesis and oogenesis have been observed in numerous reptiles, these phenomena have not been described in detail in a crocodilian. Oogenesis and histological features of the adult ovary of Alligator mississippiensis are described. Using a complex process, the ovary develops telolecithal oocytes that attain a diameter of 38.8 +/- 2.4 mm. The morphology of yolk platelets shows gradual changes throughout the oogenic process. Initially, yolk platelets are seen surrounded by a vesicle. As vitellogenesis advances, the vesicles contain numerous yolk spheres, with slowly growing platelets. The yolk spheres continue to increase in size and number within the vacuoles. Differences in the animal and vegetal poles are seen based on the morphology and size of the yolk platelets. The ovary of A. mississippiensis shows a well-developed system of lacunae and bundles of smooth muscle around the follicles in all stages of development. Several features seen in the ovary of A. mississippiensis are similar to those observed in birds. In particular, the morphology of the yolk platelets, especially during the middle and late vitellogenic stages, and the presence of a ovarian system of lacunae and smooth muscle. These similarities in the reproductive biology of crocodilians and birds contribute to current studies of the evolution of archosaurian reproduction. (C) 2000 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 10 U4 - Anatomy & Morphology U5 - J;Article AV - English IS - 0362-2525 UR - ISI:000089114600004 L2 - ovarian histology;American alligator;oogenesis;vitellogenesis;COTURNIX-COTURNIX-JAPONICA; REPRODUCTIVE-CYCLE; DOMESTIC-FOWL; LOCALIZATION; QUAIL; EVOLUTION; OVULATION SO - Journal of Morphology 2000 ;245(3):225-240 2022 UI - 16417 AU - Urreaga JM AU - Matias MC AU - De la Orden MU AU - Munguia MAL AU - Sanchez CG AD - Univ Politecn Madrid, Dept Ingn Quim Ind, ETSI Ind, E-28006 Madrid, SpainUniv Complutense Madrid, Dept Quim Organ 1, EU Opt, Madrid 28037, SpainUniv Autonoma Estado Hidalgo, Inst Ciencias Exactas, Pachuca 42074, Hidalgo, MexicoUniv Oviedo, Dept Ingn Quim & Tecnol Medio Ambiente, E-33071 Oviedo, SpainUrreaga, JM, Univ Politecn Madrid, Dept Ingn Quim Ind, ETSI Ind, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Effects of coupling agents on the oxidation and darkening of cellulosic materials used as reinforcements for thermoplastic matrices in composites AB - Oxidation and darkening occur during the processing of composites made from thermoplastic matrices and cellulosic reinforcements. We have studied the effects of several coupling agents on both the oxidation and darkening of cellulosic materials at temperatures close to those used in the processing of cellulose-reinforced thermoplastics. A maleated polypropylene wax (Epolene E-43(TM)) and two silanes (N-2-aminoethyl-3-aminopropyltrimethoxysilane and methyltrimethoxysilane) were used as coupling agents. Oxidation was measured by Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectroscopy. Standard colorimetry was used to measure darkening. Coupling agent effects depend on the nature and extent of cellulose modification achieved by treatments and the nature of the coupling agent. Epolene wax E-43 produced scarce effects on both the oxidation and darkening of cellulosic materials at 200 degrees C. Only for longer oxidation times was an increase in oxidation and darkening observed in E-43-treated samples. Silane coupling agents inhibited the formation of carbonyl and carboxyl groups for shorter oxidation times. The diaminosilane produced a stronger darkening, probably due to a chemical reaction that generated new chromophores containing C=N bonds MH - Mexico|Hidalgo MH - Spain PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0032-3888 UR - ISI:000085665400014 L2 - FIBER-POLYSTYRENE COMPOSITES; WOOD FLOUR COMPOSITES; MECHANICAL-PROPERTIES; POLYPROPYLENE COMPOSITES; POLYETHYLENE COMPOSITES; POLYMER COMPOSITES; SPECTROSCOPY; MORPHOLOGY; ADHESION; SPECTRA SO - Polymer Engineering and Science 2000 ;40(2):407-417 2023 UI - 15472 AU - Vaca L AU - Stieber J AU - Zong X AU - Ludwig A AU - Hofmann F AU - Biel M AD - Univ Nacl Autonoma Mexico, Dept Biol Celular, Inst Fisiol Celular, Mexico City 04510, DF, MexicoTech Univ Munich, Inst Pharmakol & Toxikol, D-80802 Munich, GermanyUniv Munich, Dept Pharm, Zentrum Pharmaforsch, D-81377 Munich, GermanyVaca, L, Univ Nacl Autonoma Mexico, Dept Biol Celular, Inst Fisiol Celular, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Mutations in the S4 domain of a pacemaker channel alter its voltage dependence AB - In an attempt to study the functional role of the positively charged amino acids present in the S4 segment of hyperpolarization-activated cyclic nucleotide-gated cation (HCN) channels, rye have introduced single and sequential amino acid replacements throughout this domain in the mouse type 2 HCN channel (mHCN2), Sequential neutralization of the first three positively charged amino acids resulted in cumulative shifts of the midpoint voltage activation constant towards more hyperpolarizing potentials, The contribution of each amino acid substitution was approximately -20 mV, Amino acid replacements to neutralize either the first (K291Q) or fourth (R300Q) positively charged amino acid resulted in the same shift (about -20 mV) towards more hyperpolarized potentials, Replacing the first positively charged amino acid with the negatively charged glutamic acid (K291E) produced a shift of approximately -50 mV in the same direction, None of the above amino acid substitutions had any measurable effect on the time course of channel activation. This suggests that the S4 domain of HCN channels critically controls the voltage dependence of channel opening but is not involved in regulating activation kinetics. No channel activity was detected in mutants with neutralization of the last sis positively charged amino acids from the S4 domain, suggesting that these amino acids cannot be altered without impairing channel function, (C) 2000 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000088798900008 L2 - HCN channel;voltage sensor;mutation;electrophysiology;SHAKER K+ CHANNEL; MOLECULAR CHARACTERIZATION; HEART; NODE SO - Febs Letters 2000 ;479(1-2):35-40 2024 UI - 14370 AU - Vachard D AU - de Dios AF AU - Pantoja J AU - Buitron BE AU - Arellano J AU - Grajales M AD - Univ Sci & Tech Lille, UFR Sci Terre, F-59655 Villeneuve Dascq, FranceUniv Sci & Tech Lille, Lab Paleontol & Paleogeog Paleoz, CNRS, UPRESA 8014, F-59655 Villeneuve Dascq, FranceUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Taxco, Guerrero, MexicoUniv Nacl Autonoma Mexico, Dept Palaeontol, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ingn, Mexico City 04510, DF, MexicoInst Mexicano Petr, Subdirect Explorac, Mexico City 07730, DF, MexicoVachard, D, Univ Sci & Tech Lille, UFR Sci Terre, Batiment SN5, F-59655 Villeneuve Dascq, France TI - Fusulinids from Mexico, a biostratigraphical and paleogeographical review AB - This paper focuses attention on a bibliographical review about the Mexican fusulinids, with some new data. The Early Paleozoic and the Pennsylvanian oceanizations are briefly described, and the work is mainly concerned with the Early Permian (Wolfcampian-Leonardian), fossiliferous in the whole country. Moreover the Middle- and Late Permian are very badly exposed in Mexico. A paleobiogeographic reconstruction of Mexican Upper Paleozoic suspect terranes is also provided MH - France MH - Mexico|Distrito Federal MH - Mexico|Guerrero PB - VILLEURBANNE CEDEX: UNIV CLAUDE BERNARD-LYONI RP - NOT IN FILE U3 - TC 9 U4 - Paleontology U5 - J;Review AV - French IS - 0016-6995 UR - ISI:000166856600001 L2 - fusulinids;biostratigraphy;paleogeography;suspect terranes;carboniferous;Permian;Mexico;WESTERN NORTH-AMERICA; SOUTHERN MEXICO; PALEOZOIC ROCKS; CANADIAN CORDILLERA; FLORIDA SUBSURFACE; KLAMATH MOUNTAINS; SUSPECT TERRANES; CARIBBEAN REGION; CALIFORNIA; EVOLUTION SO - Geobios 2000 ;33(6):655-679 2025 UI - 16205 AU - Vachard D AU - de Dios AF AU - Buitron BE AU - Grajales M AD - Univ Sci & Technol Lille, UFR Sci Terre, F-59655 Villeneuve Dascq, FranceUniv Sci & Technol Lille, CNRS, Lab Paleontol & Paleogeog Paleozoique, UPRESA 8014, F-59655 Villeneuve Dascq, FranceUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Taxco, Guerrero, MexicoUniv Nacl Autonoma Mexico, Dept Palaeontol, Inst Geol, Mexico City 04510, DF, MexicoInst Mexicano Petr, Subdirecc Explorac, Mexico City 07730, DF, MexicoVachard, D, Univ Sci & Technol Lille, UFR Sci Terre, Batiment SN5, F-59655 Villeneuve Dascq, France TI - Biostratigraphy with fusulinids of the Carboniferous and Permian limestones from San Salvador Patlanoaya AB - The limestones of the San Salvador Patlanoaya Formation (Mexico) yield six successive biozones of fusulinoids characterized by the genera: Triticites and Kansanella of Missourian and Early Virgilian (Upper Carboniferous), Pseudofusulina and Rugosochusenella of the Wolfcampian (Lower Permian) and Paraskinnerella and Shinnerella of the Middle Leonardian. Several species of each genus are described and illustrated: Triticites sp. 1, Triticites burgessae, Triticites milleri, Triticites piloncillosensis, Triticites acutuloides, Triticites oryziformis (= T. homecreekensis), Triticites moorensis, Triticites primarius, Triticites aff. confertoides, Triticites aff. lepidus Kansanella neglecta, Rugosochusenella emend. (= Pseudochusenella), Rugosochusenella gregaria, Skinnerella emend., Shinnerella imlayi (= S. robusta), Parashinnerella skinneri (= P. leonardensis) MH - France MH - Mexico|Distrito Federal MH - Mexico|Guerrero PB - VILLEURBANNE CEDEX: UNIV CLAUDE BERNARD-LYONI RP - NOT IN FILE U3 - TC 10 U4 - Paleontology U5 - J;Review AV - French IS - 0016-6995 UR - ISI:000086430600001 L2 - fusulinids;biostratigraphy;microfacies;Carboniferous;Permian;Mexico;MEXICO; TERRANE; COMPLEX SO - Geobios 2000 ;33(1):5-33 2026 UI - 15833 AU - Vakhnenko VO AU - Danylenko VA AU - Michtchenko AV AD - Inst Geophys, Div Geodynam Explos, UA-252054 Kyiv, UkraineInst Politecn Natl, ESIME, Mexico City 07738, DF, MexicoVakhnenko, VO, Inst Geophys, Div Geodynam Explos, B Khmelnytzky Str 63B, UA-252054 Kyiv, Ukraine TI - Diagnostics of the medium structure by long wave of finite amplitude AB - The averaged systems of hydrodynamic equations for a structured medium in the Lagrangian and the Eulerian coordinates are discussed. In the general case, the equations cannot be reduced to the average hydrodynamic terms. Under propagation of long waves in media with structure, the non-linear effects appear and they are analyzed in the framework of the asymptotic averaged model. The heterogeneity in a medium structure always increases the non-linear effects for the long-wave perturbations. A new method for diagnostics of the properties of medium components by long non-linear waves is suggested (inverse problem). The mass contents of components in the media can be determined by this diagnostic method. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mechanics U5 - J;Article AV - English IS - 0020-7462 UR - ISI:000087639900011 L2 - diagnostics;non-linear waves;inverse problem;asymptotic model;structured medium SO - International Journal of Non-Linear Mechanics 2000 ;35(6):1105-1113 2027 UI - 15947 AU - Valdes-Galicia JF AU - Dorman LI AU - Rodriguez M AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoIZMIRAN, Troitsk 142092, Moscow Region, RussiaTechnion Israel Inst Technol, IL-32000 Haifa, IsraelValdes-Galicia, JF, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Atmospheric refraction of solar neutrons during the event of 24 May 1990 AB - We revise the published neutron monitor raw data for the increase caused by the solar neutron event of the 24 May 1990. With these data we calculate the attenuation length, lambda, of solar neutrons in the Earth's atmosphere assuming either a minimum path as given by the spread of elastically scattered neutrons, or using the minimum mass path estimated by Smart, Shea, and O'Bren (1995) due to an atmospheric refraction effect. In both cases lambda reduces to a value around 100 g cm(-2), which is more in accordance with data on neutron cross-sections (Shibata, 1994). These two phenomenological calculations suggest that solar neutrons do not propagate in straight lines in the atmosphere. The previous estimate of the attenuation length, lambda=208 g cm(-2), was calculated assuming straight-ahead transport (Smart, Shea, and O'Bren, 1995). Dorman, Valdes-Galicia, and Dorman (1999) performed a numerical simulation and an analytical approximation to the problem of solar neutron scattering and attenuation in the Earth's atmosphere. These solutions incorporate the refraction effect as a natural consequence of the greater absorption experienced by neutrons scattered to large zenith angles. They are able to reproduce the normalised observed counting rates of neutron monitors for this event MH - Israel MH - Mexico|Distrito Federal MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0038-0938 UR - ISI:000087151500013 SO - Solar Physics 2000 ;191(2):409-417 2028 UI - 16007 AU - Valdes-Martinez J AU - Hernandez-Ortega S AU - Ackerman LJ AU - Li DT AU - Swearingen JK AU - West DX AD - Illinois State Univ, Dept Chem, Normal, IL 61790, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoWest, DX, Illinois State Univ, Dept Chem, Normal, IL 61790, USA TI - Spectral and structural studies of N-(2)-pyridylethyl-N '-arylthioureas AB - N-(2-pyridylethyl)-N'-phenylthiourea, triclinic, P-1, a = 8.616(1) Angstrom, b = 9.663(1) Angstrom, c = 9.761(1) Angstrom, alpha = 102.05(1)degrees, beta = 102.36(1)degrees, and gamma = 116.17(1)degrees, V = 668.5(1) Angstrom(3), Z = 2, mu = 2.022 mm(-1), N-(2-pyridylethyl)-N'-p-tolylthiourea, triclinic, P-1, a = 8.804(3) Angstrom, b = 9.951(2) Angstrom, c = 10.255(2) Angstrom, alpha = 115.03(2)degrees, beta = 105.93(2)degrees, gamma = 104.04(2) Angstrom, alpha = 713.43(1) Angstrom(3), Z = 2, mu = 2.173 mm(-1), N-(2-pyridyl-ethyl)-N'-p-bromophenylthiourea, triclinic, P-1, a = 9.536(1) Angstrom, b = 9.809(1) Angstrom, c = 10.042(2) Angstrom alpha = 115.88(1)degrees, beta = 96.80(1)degrees, and gamma = 110.44(1)degrees, V = 750.0(6) Angstrom(3), Z = 2, mu = 28.73 mm(-1), N-(2-pyridyl- ethyl)-N'-p-nitrophenylthiourea, triclinic, P-1, a=8.046(2) Angstrom, b=8.602(3) Angstrom, c=10.938(3) Angstrom, alpha=80.74(3)degrees, beta= 89.77(2)degrees, gamma = 77.00(3)degrees, V = 727.6(6) Angstrom(3), Z = 2, Cc = 2.325 mm(-1) and N-(2-pyridylethyl)-N'-p-methoxyphenylthiourea, monoclinic, P2(1)/n, a = 11.526(2) Angstrom, b = 9.723(2) Angstrom, c = 13.460(2) Angstrom, beta = 100.49(2)degrees, V = 1483.3(2) Angstrom(3), Z = 4, mu = 1.929 mm(-1). All five molecules possess an intramolecular hydrogen bond between NH and the pyridyl nitrogen, as well as intermolecular hydrogen bonding between N'H and a thione sulfur of a second molecule to form centrosymmetric dimers. Solution H-1 NMR studies (CDCl3) show the N'H resonance downfield for each thiourea and its shift, as well as that of NH, is affected by substituents on the phenyl ring. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000087092000002 L2 - thioureas;hydrogen bonding;crystal structure;N-pyridylethylthioureas SO - Journal of Molecular Structure 2000 ;524():51-59 2029 UI - 16129 AU - Valdes-Ramos R AU - Mendoza I AU - Solomons NW AD - Inst Nacl Perinatol, Mexico City, DF, MexicoCtr Studies Sensory Impairment Aging & Metab, Guatemala City, Guatemala TI - Concordance of rural guatemalan diets with dietary guidelines for Americans: Estimates from existing dietary-intake data MH - Guatemala MH - Mexico|Distrito Federal PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000085918104587 SO - Faseb Journal 2000 ;14(4):A793-A793 2030 UI - 15953 AU - Valencia-Flores M AU - Orea A AU - Castano VA AU - Resendiz M AU - Rosales M AU - Rebollar V AU - Santiago V AU - Gallegos J AU - Campos RM AU - Gonzalez J AU - Oseguera J AU - Garcia-Ramos G AU - Bliwise DL AD - Inst Nacl Nutr Salvador Zubiran, Dept Neurol, Mexico City 14000, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Cardiol, Mexico City 14000, DF, MexicoInst Nacl Nutr Salvador Zubiran, Obes Clin, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Univ Hlth Res Program, Sch Psychol, Mexico City 04510, DF, MexicoEmory Univ, Sch Med, Sleep Disorders Ctr, Atlanta, GA, USAValencia-Flores, M, Inst Nacl Nutr Salvador Zubiran, Dept Neurol & Psiquiatria, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Prevalence of sleep apnea and electrocardiographic disturbances in morbidly obese patients AB - Objective: To determine the prevalence of sleep apnea in morbidly obese patients and its relationship with cardiac arrhythmias. Research Methods and Procedures: Fifty-two consecutive morbidly obese (body mass index greater than or equal to 40 kg/m(2)) outpatients from the Obesity Clinic of the National Institute of Nutrition Salvador Zubiran underwent two nights of polysomnography with standard laboratory techniques. Electrocardiographic polysomnography signals (Lead II) were evaluated by two experienced cardiologists, and sleep complaints were measured with a standard sleep questionnaire (Sleep Disorders Questionnaire). In order to make comparisons between groups with different severities of sleep-disordered breathing, we classified the patients in four groups using the apnea-hypopnea index (AHI): Group 1, AHI 5 < 15 (n = 10); Group 2, AHI 15 < 30 (n = 10); Group 3, AHI 30 < 65 (n = 14); Group 4, AHI greater than or equal to 65 (n = 17). Results: A wide range of sleep-disordered breathing, ranging from AHI of 2.5 to 128.9 was found. Ninety-eight percent of the sample (n = 51) had an AHI greater than or equal to 5 (mean = 51 +/- 37), and 33% had severe sleep apnea with AHI greater than or equal to 65 with a mean nocturnal desaturation time of <65% over 135 minutes. Electrocardiographic abnormalities were present in 31% of the patients. Cardiac rhythm alterations showed an association with the level of sleep-disordered breathing and oxygen desaturation. Discussion: We conclude that there is a high prevalence of sleep apnea in morbidly obese patients and that the risk for cardiac arrhythmias increases in this population in the presence of a severe sleep apnea (AHI greater than or equal to 65) with severe oxygen desaturation (Sao(2) less than or equal to 65%) MH - Mexico|Distrito Federal MH - USA PB - ROCHESTER: NORTH AMER ASSOC STUDY OBESITY RP - NOT IN FILE U3 - TC 29 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 1071-7323 UR - ISI:000087135100009 L2 - obstructive sleep apnea syndrome;massive obesity;cardiac rhythm disturbances;oxyhemoglobin desaturation;CARDIAC-ARRHYTHMIAS; WEIGHT-REDUCTION; DESATURATION; MORTALITY SO - Obesity Research 2000 ;8(3):262-269 2031 UI - 16404 AU - Valenzuela RW AU - Wysession ME AU - Neustadt MO AU - Butler JL AD - Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130, USAValenzuela, RW, Univ Nacl Autonoma Mexico, Inst Geofis, Dept Sismol, Circuito Invest S-N,Cd Univ, Mexico City 04510, DF, Mexico TI - Lateral variations at the base of the mantle from profiles of digital S-diff data AB - Average long-wavelength shear velocity structure in several regions at the base of the mantle is determined using the profiles of core-diffracted SH waves (SHdiff) There is significant lateral variation in the S-diff apparent ray parameters, suggesting considerable lateral shear velocity anomalies in D ", the region just above the core-mantle boundary (CMB). Apparent ray parameters are determined by least squares fits through the pulse maxima of the instrument-deconvolved ground displacements, and heterogeneities are quantified through comparisons with reflectivity synthetic ray parameters. Corrections are applied to the data to account for the effects of the Earth's ellipticity and of mantle heterogeneities along the SHdiff upswing paths. A total of 161 SHdiff profiles were obtained, greatly expanding the number of ray parameter measurements reported in previous studies. Most of the observed slownesses fall in the range between 8.2 and 8.8 s/deg. These correspond to slowness anomalies of +/- 3.5%. The most robust and extensive feature resolved is under the northern and northeastern Pacific Ocean. The slowest values (Delta p = + 4%) occur toward the southeast, and there is a trend toward fast velocities moving to the northern and eastern rims of the Pacific. A model of D " shear velocities is obtained by converting the slownesses to velocity anomalies, superposing the D " path profiles onto the CMB, and applying a weighted moving cap spatial average. This model agrees well with many current tomographic models, both at large (similar to 5000 km) and intermediate (similar to 1000 km) scales. The fact that this occurs with a different type of data and technique of analysis suggests that we are now able to recognize some of the smaller-scale lateral variations at the base of the mantle. Locations of fast and slow velocity anomalies at the CMB are consistent with the model of cold paleoslabs pending at the CMB and forcing D " rock laterally to form hot aggregates that give rise to plumes in the mantle and hot spots at the surface MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000085772700039 L2 - MOMENT TENSOR SOLUTIONS; DIFFERENTIAL TRAVEL-TIMES; LOWERMOST MANTLE; JANUARY-MARCH; APRIL-JUNE; OCTOBER-DECEMBER; BOUNDARY-LAYER; JULY-SEPTEMBER; P-WAVES; SEISMIC ANISOTROPY SO - Journal of Geophysical Research-Solid Earth 2000 ;105(B3):6201-6220 2032 UI - 15307 AU - Vallejo-Valdezate LA AU - Martin-Gil J AU - Jose-Yacaman M AU - Martin-Gil FJ AU - Gil-Carcedo LM AD - Hosp Univ Del Rio Hortega, Dept Surg, Area Otorhinolaryngol, Valladolid 47010, SpainHosp Univ Del Rio Hortega, Unit Res, Valladolid 47010, SpainUniv Valladolid, Dept IAF, Palencia, SpainNatl Inst Nucl Res, Mexico City, DF, MexicoVallejo-Valdezate, LA, Hosp Univ Del Rio Hortega, Dept Surg, Area Otorhinolaryngol, C Cardenal Torquemada S-N, Valladolid 47010, Spain TI - Scanning electron microscopy images and energy-dispersive X-ray microanalysis of the stapes in otosclerosis and van der Hoeve syndrome AB - Objective/Hypothesis: The objective of this study was to evaluate the morphological and microchemical changes that affect sclerotic stapes in otospongiosis and van der Hoeve syndrome. Methods: A scanning electron microscope equipped with an energy-dispersive x-ray analyzer was used in the experiments. Results: In otosclerosis, focal lesions are poorly mineralized, with low calcium salt and reduced calcium-to-phosphorus (Ca/P) ratio (1.9:1). This finding correlates with a spongiotic type of lesion and indicates unstable mineralization with possible change from hydroxyapatite to calcium triphosphate. In van der Hoeve syndrome the presence of magnesium in stapes suggests osteoclastic function stimulation. The osteoclasts secrete many protons, causing an acidified microenvironment. Brushite is formed, and Ca/P ratio decreases in comparison with that of control patients (2.0:1 vs. 2.6:1) MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Otorhinolaryngology U5 - J;Article AV - English IS - 0023-852X UR - ISI:000089127800017 L2 - stapes;otospongiosis;otosclerosis;van der Hoeve syndrome;scanning electron microscopy;calcium-to-phosphorus ratio;brushite;hydroxyapatite;OSTEOGENESIS IMPERFECTA; COLLAGEN; BONE; RESONANCE SO - Laryngoscope 2000 ;110(9):1505-1510 2033 UI - 15603 AU - Vallejo V AU - Reyes-Leyva J AU - Hernandez J AU - Ramirez H AU - Delannoy P AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Lab Inmunol, Mexico City 04510, DF, MexicoInst Mexicano Seguro Social, Ctr Invest Biomed Oriente, Virol Lab, Puebla 72001, MexicoSecretaria Salud, Inst Nacl Enfermedades Resp, Dept Bioquim, Tlalpan 01470, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet, Dept Producc Procina, Mexico City 04510, DF, MexicoUniv Sci & Technol Lille, UMR CNRS 8576, Lab Chim Bol, F-59655 Villeneuve Dascq, FranceZenteno, E, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Lab Inmunol, POB 70159, Mexico City 04510, DF, Mexico TI - Differential expression of sialic acid on porcine organs during the maturation process AB - Sialylated structures play important roles in cell communication, and change in a regulated manner during development and differentiation. In this work, we report the main glycosidic modifications that occur during the maturation of porcine tissues, involving the sialylation process as determined with lectins. Sialic acids were identified at several levels in a broad range of cell types of nervous, respiratory, genitourinary and lymphoid origin. Nevertheless, the most contrasting was the type of glycosidic linkage between 5-N-acetyl-neuraminic acid (Neu5Ac) and ealactose (Gal) expressed in central nervous system (CNS), Newborn CNS abundantly expressed Neu5Ac alpha 2,3Ga1, but weakly or scarcely expressed Neu5Ac alpha 2,6Gal/GalNAc. Maturation of CNS induced drastic changes in sialic acid expression. These changes include decrease or complete loss of NeuAc alpha 2.3Gal residues. mainly in olfactory structures and brain cortex, which were replaced by their isomers Neu5Ac alpha 2,6Gal/GalNAc. In the brain cortex and cerebellum the increase of Neu5Ac alpha 2,6Gal/ GalNAc molecules was paralleled by an increase of 5-N-acetyl-9-O-acetyl-neuraminic acid (Neu5,9Ac2). In addition, terminal Gal and N-acetyl-D-galactosamine (GalNAc) residues also increased their expression in adult CNS tissues, but this was more significant in structures forming the encephalic trunk. Our results show that sialylation of porcine CNS is finely modulated throughout the maturation process. (C) 2000 Elsevier Science Inc. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 0305-0491 UR - ISI:000088315400016 L2 - neuraminic acid lectins;glycosylation;oligosaccharides;central nervous system;maturation process;swine;histochemistry;BETA-GALACTOSIDE ALPHA-2,6-SIALYLTRANSFERASE; AMARANTHUS-LEUCOCARPUS LECTIN; TRANSCRIPTIONAL INDUCTION; SMALL-INTESTINE; HISTOCHEMISTRY; DEXAMETHASONE; GLYCOSYLATION; SPECIFICITY; RUBULAVIRUS; RECOGNIZES SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2000 ;126(3):415-424 2034 UI - 16418 AU - Valles E AU - Durando D AU - Katime I AU - Mendizabal E AU - Puig JE AD - Univ Guadalajara, Dept Quim & Ingn Quim, Guadalajara 44430, Jalisco, MexicoPlanta Piloto Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, E-48080 Bilbao, SpainValles, E, Univ Guadalajara, Dept Quim & Ingn Quim, Boul M Garcia Barragan 1455, Guadalajara 44430, Jalisco, Mexico TI - Equilibrium swelling and mechanical properties of hydrogels of acrylamide and itaconic acid or its esters AB - The equilibrium swelling and the plateau elastic modulus of a family of hydrogels made by the polymerization of acrylamide with itaconic acid or some of its esters were investigated as a function of composition and crosslinking degree to find materials with satisfactory swelling and elastic properties. We show that an appropriate selection of the comonomers and the concentration of the crosslinking agent is very important to produce hydrogels with large swelling capacity and good mechanical attributes. Tailoring of mechanical properties and swelling can also be achieved by this method MH - Argentina MH - Mexico|Jalisco MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0170-0839 UR - ISI:000085707400015 L2 - KINETICS SO - Polymer Bulletin 2000 ;44(1):109-114 2035 UI - 14757 AU - valos-Diaz E AU - Olague-Marchan M AU - Lopez-Swiderski A AU - Herrera-Esparza R AU - Diaz LA AD - Univ Autonoma Zacatecas, Dept Immunol, Guadalupe, Zacatecas, MexicoMed Coll Wisconsin, Dept Dermatol, Milwaukee, WI 53226, USAVet Affairs Med Ctr, Milwaukee, WI, USAAvalos-Diaz, E, Chepinque 306,Col Lomas Soledad, Zacatecas 98040, Mexico TI - Transplacental passage of maternal pemphigus foliaceus autoantibodies induces neonatal pemphigus AB - The association of maternal pemphigus foliaceus (PF) with neonatal PF is rare and may be secondary to transplacental passage of PF autoantibodies. We describe a 25-year-old patient with PF who was delivered of two consecutive babies, one with classic skin lesions of PF and another that was normal. The neonate with PF was born when the mother had widespread skin disease; the normal newborn was born when the mother was in partial remission. The titers of PF autoantibodies were higher in the mother's serum and the cord serum of the baby with PF than in the mother during partial remission and the unaffected baby. The mother and affected baby had autoantibodies to desmoglein 1. Furthermore, cord blood from the baby with PF induced skin disease when injected into mice. In this case, maternal PF was associated with neonatal PF when the titers of maternal anti-desmoglein 1 autoantibodies were elevated. The cutaneous disease in neonatal PF is due to anti-desmoglein 1 autoantibodies MH - Mexico|Zacatecas MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 5 U4 - Dermatology U5 - J;Article AV - English IS - 0190-9622 UR - ISI:000165700000026 L2 - PASSIVE TRANSFER; FOGO SELVAGEM; VULGARIS; ANTIBODIES; DISEASE; MICE SO - Journal of the American Academy of Dermatology 2000 ;43(6):1130-1134 2036 UI - 14622 AU - van't Veer R AU - Islebe GA AU - Hooghiemstra H AD - Univ Amsterdam, Dept Paleo Actuoecol, Hugo de Vries Lab, NL-1098 SM Amsterdam, NetherlandsEcosur Unidad Chetumal Quintana Roo, Mexico City 77000, DF, MexicoHooghiemstra, H, Univ Amsterdam, Dept Paleo Actuoecol, Hugo de Vries Lab, Kruislaan 318, NL-1098 SM Amsterdam, Netherlands TI - Climatic change during the Younger Dryas chron in northern South America: a test of the evidence AB - New AMS and palynological data are presented from the Colombian Andes to assess vegetational and climatic change during the Lateglacial-Holocene transition, with special emphasis on the Younger Dryas (YD) chronozone. The new evidence is compared and discussed with other Colombian cores and with data from other countries in the region. The Lateglacial climatic reversal in Colombia, known as the Fl Abra stadial, has an estimated lower boundary of 11,200 (conventional) and 10,900 (interpolated) C-14 yr BP, respectively. Although the El Abra stadial is assumed to be the equivalent of the European YD, the present data suggest that the Fl Abra stadial is a biostratigraphical signal representing both the YD chronozone and the earliest Holocene (11,000-9000 C-14 Yr BP). On the basis of new AMS dates and a re-evaluation of the pollen zones, we divided the Colombian El Abra biozone into two phases. From ca. 11,000 to ca. 10,500 C-14 yr BP there is a sharp increase of subparamo and paramo pollen, reflecting a relatively cool phase during the YD chronozone (zone Y1). After ca. 10,500 14C yr BP, a slight increase of arboreal pollen and the presence of Cactaceae (zone Z1) point toward a relatively milder but drier phase extending to ca. 9000 C-14 yr BP in the earliest Holocene. Our conclusions add detail to the concept of astronomical forcing of contrasting rainfall changes in northern South America between 12,400 and 8800 C-14 yr BP. We propose an environmental drought during the El Abra biozone, with subsequent erosion of the sediments deposited during that period, as a major factor explaining the poor presence of YD evidence in northern South America. We conclude that at hydrologically sensitive sites without a clear lithological change around 11,000-9000 C-14 yr BP, a hiatus during the YD chronozone can only be detected if other cores are available with bracketed time control. We state that the start of the temperature decline in Central America and northern South America is related to the global YD cooling event. However, much work is still required to understand the duration and amplitude of the climatic reversal during the YD chronozone in this part of the globe. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0277-3791 UR - ISI:000165969500011 L2 - EASTERN CORDILLERA; POLLEN RECORD; LAKE VALENCIA; COSTA-RICA; ICE CORE; YR BP; ANDES; COLOMBIA; VEGETATION; EVENT SO - Quaternary Science Reviews 2000 ;19(17-18):1821-1835 2037 UI - 16041 AU - van Duijneveldt JS AU - Gil-Villegas A AU - Jackson G AU - Allen MP AD - Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, EnglandUniv Guanajuato, Inst Fis, Leon 37150, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2BY, EnglandUniv Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, Englandvan Duijneveldt, JS, Univ Bristol, Sch Chem, Cantocks Close, Bristol BS8 1TS, Avon, England TI - Simulation study of the phase behavior of a primitive model for thermotropic liquid crystals: Rodlike molecules with terminal dipoles and flexible tails AB - A primitive model for small mesogenic molecules is proposed, consisting of three elements: (i) a rigid rodlike core, modeled as a hard spherocylinder of length/diameter ratio L/D=5; (ii) a flexible end group, consisting of five segments of length D, which is "ideal" in the sense that it has no volume; (iii) a terminal dipole, located in the end cap opposite the flexible tail. This model is studied using Monte Carlo computer simulation, and the dipolar interactions are evaluated using the reaction field method. The hard spherocylinder model displays four phases: isotropic, nematic, smectic-A and crystal. Previously, it was found that the addition of the terminal dipole to hard spherocylinders without tails greatly enhances the range of stability of the nematic phase, at the expense of the smectic-A phase [McGrother , J. Phys.: Condens. Matter 8, 9649 (1996)]. Conversely, adding the flexible tail to hard spherocylinders without dipoles is found to suppress the nematic phase, whereas the smectic-A and crystal phase are little affected. Combining the effects of the terminal dipole and the flexible tail, all four phases survive. Because of the dipoles, the particles prefer to adopt a staggered antiparallel arrangement. In the smectic-A and crystal phases, this gives rise to interdigitation of the smectic layers. In the crystal phase a tendency towards columnar ordering is observed. The results are compared with experimental observations. (C) 2000 American Institute of Physics. [S0021-9606(00)50420-6] MH - United Kingdom MH - Mexico|Guanajuato PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 18 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000086851200040 L2 - LEBWOHL-LASHER MODEL; HARD-CORE MODELS; COMPUTER-SIMULATION; MONTE-CARLO; SMECTIC-A; THERMODYNAMIC STABILITY; SEMIFLEXIBLE MOLECULES; DYNAMICS SIMULATIONS; LONGITUDINAL DIPOLES; ORDERED PHASES SO - Journal of Chemical Physics 2000 ;112(20):9092-9104 2038 UI - 16105 AU - van Helden J AU - Rios AF AU - Collado-Vides J AD - Free Univ Brussels, Unite Conformat Macromol Biol, B-1050 Brussels, BelgiumUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62100, Morelos, Mexicovan Helden, J, Free Univ Brussels, Unite Conformat Macromol Biol, CP 160-16,50 Av FD Roosevelt, B-1050 Brussels, Belgium TI - Discovering regulatory elements in non-coding sequences by analysis of spaced dyads AB - The application of microarray and related technologies is currently generating a systematic catalog of the transcriptional response of any single gene to a multiplicity of experimental conditions. Clustering genes according to the similarity of their transcriptional response provides a direct hint to the regulons of the different transcription factors, many of which have still not been characterized. We have developed a new method for deciphering the mechanism underlying the common transcriptional response of a set of genes, i.e. discovering cis-acting regulatory elements from a set of unaligned upstream sequences. This method, called dyad analysis, is based on the observation that many regulatory sites consist of a pair of highly conserved trinucleotides, spaced by a nonconserved region of fixed width. The approach is to count the number of occurrences of each possible spaced pair of trinucleotides, and to assess its statistical significance, The method is highly efficient in the detection of sites bound by C-6 Zn-2 binuclear cluster proteins, as well as other transcription factors. In addition, we show that the dyad and single-word analyses are efficient for the detection of regulatory patterns in gene clusters from DNA chip experiments. In combination, these programs should provide a fast and efficient way to discover new regulatory sites for as yet unknown transcription factors MH - Belgium MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 89 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000086699400018 L2 - UNALIGNED DNA FRAGMENTS; PROTEIN-BINDING SITES; SACCHAROMYCES-CEREVISIAE; GENOMIC-SCALE; ZINC CLUSTER; YEAST; IDENTIFICATION; ALGORITHM; UPSTREAM; PATTERNS SO - Nucleic Acids Research 2000 ;28(8):1808-1818 2039 UI - 16517 AU - van Helden J AU - Andre B AU - Collado-Vides J AD - Free Univ Brussels, Unite Conformat Macromol Biol, B-1050 Brussels, BelgiumUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62100, Morelos, MexicoFree Univ Brussels, Lab Physiol Cellulaire & Genet Levures, B-6041 Gosselies, BelgiumVan Helden, J, Free Univ Brussels, Unite Conformat Macromol Biol, CP160-16,50 Av FD Roosevelt, B-1050 Brussels, Belgium TI - A web site for the computational analysis of yeast regulatory sequences AB - A series of computer programs were developed for the analysis of regulatory sequences, with a special focus on yeast. These to ols are publicly available on the web (http://copan.cifn.unam.mx/Computational_Biology/yeast-tools or http://www.ucmb.ulb.ac.be/bioinformatics/rsa-tools/). Basically, three classical problems can be addressed: (a) search for known regulatory patterns in the upstream regions of known genes; (b) discovery of unknown regulatory patterns within a set of upstream regions known to be co-regulated; (c) search for unknown genes potentially regulated by a known transcription factor. Each of these tasks can be performed on basis of a simple (string) or more refined (matrix) description of the regulatory patterns. A feature-map program automatically generates visual representations of the positions at which patterns were found. The site also provides a series of general utilities, such as generation of random sequence, automatic drawing of XY graphs, interconversions between sequence formats, etc. Several tools are linked together to allow their sequential utilization (piping), but each one can also be used independently by filling the web form with external data. This widens the scope of the site to the analysis of nonregulatory and/or non-yeast sequences. Copyright (C) 2000 John Wiley & Sons, Ltd MH - Belgium MH - Mexico|Morelos PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 88 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Microbiology;Mycology U5 - J;Article AV - English IS - 0749-503X UR - ISI:000085307200007 L2 - bioinformatics;yeast;transcriptional regulation;sequence analysis;DNA-SEQUENCES; GENES SO - Yeast 2000 ;16(2):177-187 2040 UI - 15029 AU - Vandame R AU - Colin ME AU - Morand S AU - Otero-Colina G AD - Colegio Postgrad, Inst Fitosanidad, Mexico City, DF, MexicoEcosur, Unidad Tapachula, Proyecto Abejas Chiapas, Tapachula 30700, Chiapas, MexicoCtr Rech Avignon, Inst Natl Rech Agron, Stn Zool & Apidol, Avignon, FranceUniv Perpignan, Ctr Biol & Ecol Trop & Mediterraneenne, CNRS, UMR 5555, F-66025 Perpignan, FranceVandame, R, Colegio Postgrad, Inst Fitosanidad, Campus Cordoba, Mexico City, DF, Mexico TI - Levels of compatibility in a new host-parasite association: Apis mellifera/Varroa jacobsoni AB - We investigated the relationships between the honey bee, Apis mellifera, and the parasitic mite Varroa jacobsoni in Mexico. In an 18-month survey of European honey bees (EHB) and Africanized honey bees (AHB), we showed that EHB were highly compatible with V. jacobsoni, while AHB were not as compatible. Furthermore, mite infertility ("parasite infectivity" factor), suspected to be the main factor of low AHB/V. jacobsoni compatibility in Brazil, was not observed in Mexico. The "intrinsic rate of natural increase" of mites did not differ significantly between host subspecies, indicating that the cause of low compatibility appears only at high parasite densities. The "carrying capacity" was twice as high in EHB as in AHB, indicating that the cause of low compatibility is possibly linked to honey bees' behavior. We hypothesize that the reason why V. jacobsoni is highly fertile on Mexican AHB (whereas it has low fertility on Brazilian AHB) may be that different strains of V. jacobsoni exist in the two countries MH - France MH - Mexico|Chiapas MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 12 U4 - Zoology U5 - J;Article AV - English IS - 0008-4301 UR - ISI:000090016400019 L2 - MITE VARROA-JACOBSONI; PAPUA-NEW-GUINEA; HONEY-BEES; ECHINOSTOMA-CAPRONI; NON-REPRODUCTION; INFESTATION RATE; BROOD; COLONIES; WORKER; MEXICO SO - Canadian Journal of Zoology-Revue Canadienne de Zoologie 2000 ;78(11):2037-2044 2041 UI - 15581 AU - Vandemark G AU - Martinez O AU - Pecina V AU - Alvarado MD AD - ARS, USDA, Vegetable & Forage Prod Unit, Prosser, WA 99350, USAIPN, CINVESTAV, Dept Ingn Genet, Irapuato 36500, Gto, MexicoIPN, CINVESTAV, Dept Biotecnol & Bioquim, Irapuato 36500, Gto, MexicoVandemark, G, ARS, USDA, Vegetable & Forage Prod Unit, Prosser, WA 99350 USA TI - Assessment of genetic relationships among isolates of Macrophomina phaseolina using a simplified AFLP technique and two different methods of analysis AB - A simplified protocol for detecting amplified restriction fragment length polymorphisms (AFLPs) was used to evaluate genetic diversity among isolates of Macrophomina phaseolina collected from different hosts and locations. Fifteen different selective primer pairs were evaluated. No significant differences were observed among primer pairs, grouped based on the AT% of the selective nucleotides, for several parameters that define primer utility. Relationship matrices generated with each group of AFLP primers were highly correlated (r(2) > 0.92). Isolates were very diverse and could not clearly be grouped based on the geographic locations from which they were obtained. Genetic relationships among isolates were very robust. Relationships were determined using both the 'genetic similarity' method of Nei and Li and the 'genetic distance' method of Skroch. We conclude that both methods are equally effective for determining intraspecific genetic relationships when the majority of markers are polymorphic MH - USA MH - Mexico|Guanajuato PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 9 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000088424000007 L2 - agarose gel electrophoresis;genetic distance;genetic similarity;selective primers;AMPLIFIED POLYMORPHIC DNA; COLLETOTRICHUM-LINDEMUTHIANUM; RAPD ANALYSIS; MARKERS; FUNGI; VARIABILITY; RESISTANCE; DIVERSITY; SORGHUM; PRIMERS SO - Mycologia 2000 ;92(4):656-664 2042 UI - 16130 AU - Vander Stappen J AU - Weltjens I AU - Gama Lopez S AU - Volckaert G AD - Katholieke Univ Leuven, Lab Gene Technol, B-3001 Louvain, BelgiumUniv Nacl Autonoma Mexico, ENEP Iztacala, Unidad Biol Tecnol & Protipos, Tlalnepantla 54090, Mexico, MexicoVolckaert, G, Katholieke Univ Leuven, Lab Gene Technol, Kardinaal Mercierlaan 92, B-3001 Louvain, Belgium TI - Genetic diversity in Mexican Stylosanthes humilis as revealed by AFLP, compared to the variability S-humilis accessions of South American origin AB - Amplified fragment length polymorphism (AFLP) analysis was used to determine genetic relationships among 32 accessions of the species Stylosanthes humilis, representing 26 and 6 accessions of Mexican and South American origin, respectively. Seven AFLP primer pairs generated a total of 111 polymorphic bands with an average of 15.8 polymorphisms per combination and a polymorphic information content ranging from 0.89 to 0.79. Cluster analysis and principal coordinates analysis of the calculated similarity matrix clearly separated all the Mexican accessions, with one exception, from the accessions of South American origin. The observation of differentiation of these two main groups by AFLP analysis is highly congruent with previous studies based on morphological descriptors, cross-hybridization experiments, and chloroplast DNA sequence analysis, and may suggest that both groups evolved separately due to geographical isolation in the past, resulting in the existence of at least 2 principal gene pools. Within the Mexican collection, three groups were recognized, each corresponding to a geographical region with a low within-group and a high between-group genetic variability. Although most Mexican accessions formed one major group, one accession clustered with the South American gene pool. These findings show that Mexico may contain unique sources of S. humilis and therefore would merit attention for conservation and maintenance of S. humilis germplasm. Also, these results demonstrate that AFLP analysis is an efficient method for assessing genetic diversity among S. humilis accessions MH - Belgium MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000086622300008 L2 - amplified fragment length polymorphism (AFLP);geneticdiversity;geographical distribution;Mexico;Stylosanthes humilis;DNA; MARKERS SO - Euphytica 2000 ;113(2):145-154 2043 UI - 15061 AU - Varadarajan M AU - Zapata JA AD - Raman Res Inst, Bangalore 560080, Karnataka, IndiaUNAM, Inst Matamat, Morelia 58089, Michoacan, MexicoVaradarajan, M, Raman Res Inst, Sir CV Raman Ave, Bangalore 560080, Karnataka, India TI - A proposal for analysing the classical limit of kinematic loop gravity AB - We analyse the classical limit of kinematic loop quantum gravity in which the diffeomorphism and Hamiltonian constraints are ignored. We show that there are no quantum states in which the primary variables of the loop approach, namely the SU(2) holonomies along all possible loops, approximate their classical counterparts. At most a countable number of loops must be specified. To preserve spatial covariance, we choose this set of loops to be based on physical lattices specified by the quasiclassical states themselves. We construct 'macroscopic' operators based on such lattices and propose that these operators be used to analyse the classical limit. Thus, our aim is to approximate classical data using states in which appropriate macroscopic operators have low quantum fluctuations. Although, in principle, the holonomies of 'large' loops on these lattices could be used to analyse the classical limit, we argue that it may be simpler to base the analysis on an alternate set of 'flux'-based operators. We explicitly construct candidate quasiclassical states in two spatial dimensions and indicate how these constructions may generalize to three dimensions. We discuss the less robust aspects of our proposal with a view towards possible modifications. Finally, we show that our proposal also applies to the diffeomorphism-invariant Rovelli model which couples a matter reference system to the Hussain-Kuchar model MH - India MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000089958000011 L2 - QUANTUM-FIELD THEORY; SPIN DYNAMICS QSD; GEOMETRY; NETWORKS; CONNECTIONS; SPACE; STATE; SUM SO - Classical and Quantum Gravity 2000 ;17(19):4085-4109 2044 UI - 15392 AU - varado-Cabrero I AU - Folpe AL AU - Srigley JR AU - Gaudin P AU - Philip AT AU - Reuter VE AU - Amin MB AD - Inst Mexicano Seguro Social, Dept Pathol, Colima, Colonia Roma, MexicoEmory Univ, Sch Med, Dept Pathol & Lab Med, Atlanta, GA 30322, USACredit Valley Hosp, Dept Lab Med, Mississauga, ON, CanadaMem Sloan Kettering Canc Ctr, Dept Pathol, New York, NY 10021, USAAmin, MB, Emory Univ Hosp, Dept Pathol, G169,1364 Clifton Rd NE, Atlanta, GA 30322 USA TI - Intrarenal schwannoma: A report of four cases including three cellular variants AB - Renal schwannomas are extraordinarily rare neoplasms; only six have been reported, the majority of which occurred in the renal pelvis. We report the clinical and pathologic features of four additional cases. The resected kidney in all patients contained a well-demarcated, yellow-tan, smooth, and bulging intraparenchymal tumor (mean size, 9.7 cm; range, 4 to 16 cm). Microscopically, three cases were classified as cellular schwannomas, and one was a usual-type schwannoma, with degenerative nuclear atypia, By immunohistochemistry, all tumors were strongly S-100 protein positive and negative for pan-cytokeratin, CD57, smooth muscle actin, desmin, and CD34. Epithelial elements were not noted in the tumors, and there was no history of any clinical syndromes hn these patients. Analysis of the four cases showed the mean age at presentation to be 47 years (range, 18 to 84 years), with no sex predisposition (two men, two women). Most patients were asymptomatic, and all received a diagnosis of renal cell carcinoma and treated as having such. Recognition and awareness of these rare, benign tumors will assist in the differential diagnosis of spindle cell tumors of the kidney and prevent their misdiagnosis as sarcomatoid carcinomas of the kidney or renal sarcomas. Our study, the largest series to date of renal schwannomas, demonstrates a predilection for the cellular variant in the kidney, documents that these tumors may present in the nonhilar region of the kidney, and provides clinical evidence of their benign biologic behavior MH - Canada MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Pathology U5 - J;Article AV - English IS - 0893-3952 UR - ISI:000088861100002 L2 - kidney neoplasms;sarcomatoid renal cell carcinoma;schwannoma;STORIFORM PERINEURIAL FIBROMA; KIDNEY; NEURILEMOMA; TUMOR; RARE SO - Modern Pathology 2000 ;13(8):851-856 2045 UI - 14667 AU - varez-Buylla ER AU - Liljegren SJ AU - Pelaz S AU - Gold SE AU - Burgeff C AU - Ditta GS AU - Vergara-Silva F AU - Yanofsky MF AD - Univ Calif San Diego, Dept Biol, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoYanofsky, MF, Univ Calif San Diego, Dept Biol, La Jolla, CA 92093, USA TI - MADS-box gene evolution beyond flowers: expression in pollen, endosperm, guard cells, roots and trichomes AB - MADS-box genes encode transcriptional regulators involved in diverse aspects of plant development. Here we describe the cloning and mRNA spatio-temporal expression patterns of five new MADS-box genes from Arabidopsis: AGL16, AGL18, AGL19, AGL27 and AGL31. These genes will probably become important molecular tools for both evolutionary and functional analyses of vegetative structures. We mapped our data and previous expression patterns onto a new MADS-box phylogeny. These analyses suggest that the evolution of the MADS-box family has involved a rapid and simultaneous functional diversification in vegetative as well as reproductive structures. The hypothetical ancestral genes had broader expression patterns than more derived ones, which have been co-opted for putative specialized functions as suggested by their expression patterns. AGL27 and AGL31, which are closely related to the recently described flowering-time gene FLC (previously AGL25), are expressed in most plant tissues. AGL19 is specifically expressed in the outer layers of the root meristem (lateral root cap and epidermis) and in the central cylinder cells of mature roots. AGL18, which is most similar in sequence to the embryo-expressed AGL15 gene, is expressed in the endosperm and in developing male and female gametophytes, suggesting a role for AGL18 that is distinct from previously characterized MADS-box genes. Finally, AGL16 RNA accumulates in leaf guard cells and trichomes. Our new phylogeny reveals seven new monophyletic clades of MADS-box sequences not specific to flowers, suggesting that complex regulatory networks involving several MADS-box genes, similar to those that control flower development, underlie development of vegetative structures MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 85 U4 - Plant Sciences U5 - J;Article AV - English IS - 0960-7412 UR - ISI:000165938000004 L2 - MADS-box;endosperm;guard cells;root;trichome;Arabidopsis;ARABIDOPSIS-THALIANA; TRANSCRIPTION FACTOR; MOLECULAR EVOLUTION; MULTIGENE FAMILY; PLANTS; PROTEIN; ORIGIN; MORPHOGENESIS; REPRESSOR; LINEAGES SO - Plant Journal 2000 ;24(4):457-466 2046 UI - 15980 AU - varez-Buylla ER AU - Pelaz S AU - Liljegren SJ AU - Gold SE AU - Burgeff C AU - Ditta GS AU - de Pouplana LR AU - Martinez-Castilla L AU - Yanofsky MF AD - Univ Calif San Diego, Dept Biol, La Jolla, CA 92093, USANatl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoScripps Res Inst, La Jolla, CA 92117, USAAlvarez-Buylla, ER, Univ Calif San Diego, Dept Biol, La Jolla, CA 92093 USA TI - An ancestral MADS-box gene duplication occurred before the divergence of plants and animals AB - Changes in genes encoding transcriptional regulators can alter development and are important components of the molecular mechanisms of morphological evolution. MADS-box genes encode transcriptional regulators of diverse and important biological functions. In plants, MADS-box genes regulate flower, fruit, leaf, and root development. Recent sequencing efforts in Arabidopsis have allowed a nearly complete sampling of the MADS-box gene family from a single plant, something that was lacking in previous phylogenetic studies. To test the long-suspected parallel between the evolution of the MADS-box gene family and the evolution of plant form, a polarized gene phylogeny is necessary. Here we suggest that a gene duplication ancestral to the divergence of plants and animals gave rise to two main lineages of MADS-box genes: Typel and Typell. We locate the root of the eukaryotic MADS-box gene family between these two lineages. A novel monophyletic group of plant MADS domains (AGL34 like) seems to be more closely related to previously identified animal SRF-like MADS domains to form Typel lineage. Most other plant sequences form a clear monophyletic group with animal MEF2-like domains to form TypeII lineage. Only plant TypeII members have a K domain that is downstream of the MADS domain in most plant members previously identified. This suggests that the K domain evolved after the duplication that gave rise to the two lineages. Finally, a group of intermediate plant sequences could be the result of recombination events. These analyses may guide the search for MADS-box sequences in basal eukaryotes and the phylogenetic placement of new genes from other plant species MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 115 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000086998500060 L2 - TRANSCRIPTION FACTORS; FLOWER DEVELOPMENT; MULTIGENE FAMILY; REGULATORY GENE; HOMEOTIC GENES; ORGAN-IDENTITY; COILED COILS; SEED PLANTS; ARABIDOPSIS; EVOLUTION SO - Proceedings of the National Academy of Sciences of the United States of America 2000 ;97(10):5328-5333 2047 UI - 16078 AU - varez-Idaboy JR AU - Mora-Diez N AU - Vivier-Bunge A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoDalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, CanadaUniv La Habana, Fac Quim, Lab Quim Computac & Teor, Habana 10400, CubaVivier-Bunge, A, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico TI - A quantum chemical and classical transition state theory explanation of negative activation energies in OH addition to substituted ethenes AB - The OH addition to ethene has been modeled using ab initio quantum chemical calculations and classical transition state theory (CTST). The results agree with the hypothesis of Singleton and Cvetanovic (Singleton, D. L.; Cvetanovic, R. J. J. Am. Chem; Sec. 1976, 98, 6812) that the reaction is not elemental, and that it consists of a reversible first step involving the formation of a prereactive complex, followed by the irreversible formation of an addition adduct. The overall rate depends on the rates of two competitive reactions, i.e., the reverse of the first step and the second step, the former being more favored by an increase in temperature than the latter. Applying CTST to the proposed mechanism, we obtain an overall rate constant of 11.7 x 10(-12) cm(3) molecule(-1) s(-1), which agrees very well with the experimental results. New results for the activation energies of the OH addition to a series of substituted ethenes have also been obtained assuming that the above mechanism holds. The activation energies were calculated from projected second-order Moller-Plesset total energies obtained with the 6-311G** basis set. We find that a plot of these data vs the logarithm of the experimental rate constants has a correlation coefficient of 0.996. This seems to imply that the preexponential factor for the series should be approximately constant, in contradiction with the reported values for A. Moreover, a plot of our effective activation energies for OH addition vs the activation energies of a similar reaction, the addition of atomic oxygen to the same series of alkenes, also yields a good correlation. Indeed, for this reaction, the reported A factors are similar to each other. We suggest that the experimental Arrhenius parameters of the OH addition reaction need to be revised MH - Canada MH - Cuba MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 46 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000086729500018 L2 - CURVED ARRHENIUS PLOTS; TEMPERATURE-DEPENDENCE; OXYGEN-ATOMS; AB-INITIO SO - Journal of the American Chemical Society 2000 ;122(15):3715-3720 2048 UI - 16230 AU - varez-Leefmans FJ AU - Herrera-Perez JJ AU - Marquez MS AU - Blanco VM AD - IPN, Dept Pharmacol, CINVESTAV, Mexico City 14740, DF, MexicoIMP, Dept Neurobiol, Mexico City, DF, MexicoWright State Univ, Dept Physiol & Biophys, Dayton, OH 45435, USA TI - Parallel changes in intracellular pH and cell water volume measured in single cells using the fluorescent probe BCECF MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Physiology U5 - J;Meeting Abstract AV - English IS - 0022-3751 UR - ISI:000085937100131 SO - Journal of Physiology-London 2000 ;523():86P-87P 2049 UI - 16568 AU - Varga Z AU - Peter M AU - Panyi G AU - Damjanovich S AU - Possani LD AU - Gaspar R AD - Debrecen Univ Med, Sch Med, Dept Biophys & Cell Biol, H-4012 Debrecen, HungaryUniv Nacl Autonoma Mexico, Dept Mol Recog & Struct Biol, Inst Biotech, Cuernavaca 62271, Morelos, Mexico TI - A putative salt bridge between Glu7 and Lys24 may explain the different binding kinetics of Pi2 and Pi3 scorpion toxins to Kv1.3 MH - Hungary MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779300564 SO - Biophysical Journal 2000 ;78(1):97A-97A 2050 UI - 15512 AU - Vargas-Alarcon G AU - Granados J AU - Martinez-Laso J AU - Gomez-Casado E AU - Zuniga J AU - Salgado N AU - Hernandez-Pacheco G AU - Hesiquio R AU - Rodriguez-Reyna TS AU - Gamboa R AU - cocer-Varela J AU - rnaiz-Villena A AD - Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoUniv Complutense, Hosp 12 Octubre, Dept Immunol, Madrid 28041, SpainInst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Biol Sect, Mexico City 14080, DF, MexicoUniv Panamericana, Sch Med, Dept Mol Biol, Mexico City, DF, MexicoGranados, J, Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Lack of association between the polymorphism at the heat-shock protein (HSP70-2) gene and systemic lupus erythematosus (SLE) in the Mexican Mestizo population AB - Major histocompatibility complex (MHO) alleles have been recognized as genetic factors for developing systemic lupus erythematosus (SLE). In the present study we analyzed whether a heat-shock protein gene (HSP70-2) is involved in determining susceptibility to develop SLE in a Mexican Mestizo population. A HSP70-2 Pst I polymorphism was detected by a restriction fragment length polymorphism analysis of polymerase chain reaction (PCR-RFLP) in 107 SLE patients and 158 healthy controls. No statistically significant differences were observed in the HSP70-2 allele distribution between patients and healthy controls. HLA-DR analysis showed an increased frequency of HLA-DR3 allele in the patients group (P < 0.05, OR = 2.26, EF= 6.0%). On the other hand, when we analyzed HSP70-2 polymorphism in relation to HLA-DR3 allele, we could only detect an increased frequency of AB genotype in the DR3 negative patients (pC < 0.05, RR = 2.6 EF= 11.3%). Linkage disequilibrium was observed for three haplotypes: HLA-DR3-HSP70-2A (D = 0.03, D' = 0.67, P < 0.01); HLA-DR1-HSP70-2A (D = 0.03 D' = 0.86, P < 0.01) and HLA-DR8-HSP70-2B (D = 0.02, D'= 0.46, P = 0.02). Our data indicate that HSP70-2 gene polymorphism as opposed to the other ethnic groups does not appear to be relevant in SLE susceptibility in Mexican patients and that the distribution of the different alleles depend on the frequency of HLA alleles associated with them MH - Mexico|Distrito Federal MH - Spain PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity;Immunology U5 - J;Article AV - English IS - 1466-4879 UR - ISI:000088695800004 L2 - genetic susceptibility;heat shock protein;systemic lupus erythematosus;RHEUMATOID-ARTHRITIS; FREQUENCIES; HLA; DISEASE SO - Genes and Immunity 2000 ;1(6):367-370 2051 UI - 16468 AU - Vargas-Alarcon G AU - Gamboa R AU - Zuniga J AU - Hernandez-Pacheco G AU - Ramos-Kuri M AU - Castillo E AU - Gomez-Casado E AU - Martinez-Laso J AU - rnaiz-Villena A AU - Granados J AD - Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Bio Sect, Mexico City 14080, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoUniv Panamericana, Dept Mol Biol, Mexico City, DF, MexicoUniv Panamericana, Escuela Med, Mexico City, DF, MexicoUniv Madrid, Hosp 12 Octubre, Dept Immunol, Madrid 3, SpainVargas-Alarcon, G, Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Bio Sect, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - HLA-DR4 allele frequencies on Indian and Mestizo population from Mexico AB - Using PCR-SSOP and sequencing, we examined DRB1*04 nucleotide polymorphism in 137 DR4-positive Mexican healthy individuals (46 Mexican Mestizos, 64 Mazatecans, and 27 Nahuas), carrying a total of 147 DR4 haplotypes. Eleven different DRB1*04 alleles were detected in Mexican Mestizo population, whereas, in the two Indian groups a restricted polymorphism was observed (5 variants in Mazatecans and 4 in Nahuas). DRB1*0407 was the most frequent allele (gf = 0.106 in Mexican Mestizos, gf = 0.281 in Mazatecans, and gf = 0.189 in Nahuas). In spite of the restriction in polymorphism, there were differences on DRB1*04 alleles found in Mexicans mainly between Mazatecan and Nahua populations. DRB1*0403 was characteristic allele in Nahua ethnic group, whereas, 0404 and 0411 were predominant alleles in Mazatecans. This data corroborates the restricted polymorphism of DRB1*04 alleles in American populations. In spite of the restriction in this polymorphism, differences in frequencies of DRB1*04 alleles could help distinguish each population. (C) American Society for Histocompatibility and Immunogenetics, 2000. Published by Elsevier Science Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 11 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000085507000021 L2 - major histocompatibility complex (MHC);polymorphism;DR4 alleles;Mexican populations;Mazatecans;Nahuas;CLASS-II ALLELES; RHEUMATOID-ARTHRITIS; SUSCEPTIBILITY; HAPLOTYPES SO - Human Immunology 2000 ;61(3):341-344 2052 UI - 16350 AU - Vargas C AU - Hirsch JG AU - Beuschel T AU - Draayer JP AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, C, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Shell model description of normal parity bands in odd-mass heavy deformed nuclei AB - The low-energy spectra and B(E2) electromagnetic transition strengths of (EU)-E-159, Tb-159, and Dy-159 are described using the pseudo SU(3) model. Normal parity bands are built as linear combinations of SU(3) states, which are the direct product of SU(3) proton and neutron states with pseudospin zero (for even number of nucleons) and pseudospin 1/2 (for odd number of nucleons). Each of the many-particle states has a well-defined particle number and total angular momentum. The Hamiltonian includes spherical Nilsson single-particle energies, the quadrupole-quadrupole and pairing interactions, as well as three rotor terms which are diagonal in the SU(3) basis. The pseudo SU(3) model is shown to be a powerful tool to describe odd-mass heavy deformed nuclei MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000085792500001 L2 - PSEUDOSPIN SYMMETRY; DEFORMATION; EXCITATIONS; QUADRUPOLE; STRENGTH; SU(3) SO - Physical Review C 2000 ;6103(3): 2053 UI - 15864 AU - Vargas CE AU - Hirsch JG AU - Draayer JP AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, CE, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Pseudo SU(3) shell model: Normal parity bands in odd-mass nuclei AB - A pseudo shell SU(3) model description of normal parity bands in Tb-159 is presented. The Hamiltonian includes spherical Nilsson single-particle energies, the quadrupole-quadrupole and pairing interactions, as well as three rotor terms. A systematic parametrization is introduced, accompanied by a detailed discussion of the effect each term in the Hamiltonian has on the energy spectrum. Yrast and excited band wavefunctions are analyzed together with their B(E2) values. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000087525600012 L2 - pseudo SU(3) model;Tb-159;rare earth nuclei;odd-mass nuclei;excitation energies;B(E2) values;LOW-ENERGY STRUCTURE; DEFORMED-NUCLEI; QUADRUPOLE; DEFORMATION; SYMMETRY; STRENGTH SO - Nuclear Physics A 2000 ;673(1-4):219-237 2054 UI - 15897 AU - Vargas R AU - Garza J AU - Dixon DA AU - Hay BP AD - Pacific NW Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Dept Quim, Mexico City 09340, DF, MexicoDixon, DA, Pacific NW Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - Conformational analysis of N,N,N ',N '-tetramethylsuccinamide: The role of C-H center dot center dot center dot O hydrogen bonds AB - We report a conformational analysis of N,N,N',N'-tetramethylsuccinamide. An initial set of geometries was obtained through an exhaustive conformer search with molecular mechanics. The structures were further optimized using density functional theory (DFT) with the generalized-gradient approximation. Single-point energies on the DFT geometries are reported at the second-order Moller-Plesset (MP2) levels. The lowest energy conformations were further optimized at the MP2 level. Geometries and relative energies for 22 conformations are reported. The geometries are rationalized in terms of rotational potential energy surfaces in simple compounds, intramolecular C-H ... O hydrogen bonding, and dipole-dipole repulsion MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000087424200039 L2 - DENSITY FUNCTIONAL CALCULATIONS; METAL-AMIDE COMPLEXES; BASIS-SETS; MOLECULAR CALCULATIONS; ENERGY; APPROXIMATION; PREFERENCES; CLUSTERS; ATOMS; BORON SO - Journal of Physical Chemistry A 2000 ;104(21):5115-5121 2055 UI - 16004 AU - Vargas R AU - Garza J AU - Dixon DA AU - Hay BP AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoDixon, DA, Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - How strong is the C-alpha-H center dot center dot center dot O=C hydrogen bond? AB - Although the existence of C-alpha-H...O=C hydrogen bonds in protein structures recently has been established, little is known about their strength and, therefore, the relative importance of these interactions. We have discovered that similar interactions occur in N,N-dimethylformamide dimers. High level nb initio calculations (MP2/aug-cc-pTZV) yield electronic association energies (D-e) and association enthalpies (Delta H-298) for four dimer geometries. These data provide a lower limit of D-e = -2.1 kcal mol(-1) for the C-alpha-H...O=C hydrogen bond. A linear correlation between C-H...O bond energies and gas-phase proton affinities is reported. The gas-phase anion proton affinity of a peptide C-alpha-H hydrogen was calculated (355 kcal mol(-1)) and used to estimate values of D-e = -4.0 +/- 0.5 kcal mol(-1) and Delta H-298 = -3.0 +/- 0.5 kcal mol(-1) for the C-alpha-H...O=C hydrogen bond. The magnitude of this interaction, roughly one-half the strength of the N-H...O=C hydrogen bond, suggests that C-alpha-H...O=C hydrogen bonding interactions represent a hitherto unrecognized, significant contribution in the determination of protein conformation MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 218 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000087118100027 L2 - DENSITY FUNCTIONAL CALCULATIONS; NEUTRON-DIFFRACTION DATA; METAL-AMIDE COMPLEXES; O INTERACTIONS; BASIS-SETS; AB-INITIO; CRYSTALLOGRAPHIC EVIDENCE; MOLECULAR CALCULATIONS; GAS-PHASE; H...O SO - Journal of the American Chemical Society 2000 ;122(19):4750-4755 2056 UI - 15715 AU - Vatin-Perignon N AU - Amosse J AU - Radelli L AU - Keller F AU - Leyva TC AD - Univ Grenoble 1, UMR 5025 CNRS, Lab Geodynam Chaines Alpines, F-38031 Grenoble, FranceUniv Sonora, Dept Geol, Hermosillo 8300, Sonora, MexicoVatin-Perignon, N, Univ Grenoble 1, UMR 5025 CNRS, Lab Geodynam Chaines Alpines, 15 Rue Maurice Gignoux, F-38031 Grenoble, France TI - Platinum group element behaviour and thermochemical constraints in the ultrabasic-basic complex of the Vizcaino Peninsula, Baja California Sur, Mexico AB - The Vizcaino complex is characterized by tectonised harzburgites overlain by serpentinized dunite bodies and wherlites layers containing several cumulate chromitite deposits and by fractional crystallization sequences: cyclic repetititons of dunites, pyroxenites with pegmatoidal textures, and gabbros overlain by a succession of gabbronorites to diorites in which olivine is followed by pyroxene and by plagioclase. Enriched sulfide horizons generally associated with pegmatoidal rocks are lacking, The fractionation of platinum-group element (PGE) displays evidence of erratic dispersion throughout the intrusion, PGE patterns of chromitites show high Ir and Ru contents, relatively high Rh content and an unusual Pt-Pd depletion lower than in ophiolitic chromitites. These chromitites do not contain laurite-type sulfides, which are commonly observed in association with Os-Ir-Ru alloys. Dunites show relatively flat patterns and gabbros present typical trends with depletions in the Iridium-group (IPGE) relative to PPGE. Ru, Rh, and especially Ir are very low in these silicate rocks, indicating the precipitation of these elements during the earliest stages of fractional crystallization and their concentration in chromitites. Spilitized dolerite dykes from the metamorphic basement show significant PGE enrichments similar to those of gabbros, Based on our previous thermochemical data, an extremely low f(S2) (<10(-2) atm) was in equilibrium with the silicate melt as indicated by the absence of laurite included in chromitites. In the absence of complexation of Pt (+Pd) by sulfur in the early stage of magmatic differentiation, a complexation of these elements by Cl as chloride complexes in a Cl-rich fluid phase may be expected. This hypothesis is reinforced by the notable absence of any sulfide horizon throughout the intrusion. Part of precious metals (Pt + Pd + Au) may have been remobilized at low temperature and transported as chloride or hydroxide complexes by fluid phases introduced during low-grade metamorphic processes or later during deformation events. In this interpretation, the erratic behaviour of PGE at Vizcaino was partially controlled by solubilities of Pt and Pd as chloride complexes at magmatic temperatures as early as chromite crystallization and the control of local saturation of the magma by variation of f(S2) was overshadowed. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0024-4937 UR - ISI:000087998700004 L2 - Vizcaino;ultrabasic-basic complex;chromitites;PGE;f(S2);f(O2);early Cl-rich fluids;HYDROTHERMAL GEOCHEMISTRY; LAYERED INTRUSIONS; CHLORIDE COMPLEXES; CHROMITE DEPOSITS; FLUID INCLUSIONS; BUSHVELD COMPLEX; SILICATE MELTS; SULFIDE LIQUID; BASALT MELT; PALLADIUM SO - Lithos 2000 ;53(1):59-80 2057 UI - 14869 AU - Vazquez-Nava RA AU - Ulloa SE AU - Del Castillo-Mussot M AD - Univ Autonoma Estado morelos, Fac Ciencias, Cuernavaca 62000, Morelos, MexicoOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoVazquez-Nava, RA, Univ Autonoma Estado morelos, Fac Ciencias, Av Univ S-N, Cuernavaca 62000, Morelos, Mexico TI - Excited state effects in the dielectric function of a 2D boson system AB - We present calculations for the dielectric function and collective modes of a two-dimensional interacting gas of bosons (excitons) in the xy plane which can be polarized by the application of an electric field in the z direction. previous work has explored the response of the density fluctuations while excitons lie in their intrinsic ground state. We extend the Formalism here by taking into account the internal degrees of freedom of the excitons, and their possible interplay with the density fluctuation modes of the system. In the limit of low temperature, we find collective normal modes related to the Various degrees of freedom. Our calculations of the corresponding intrinsic oscillator strength show that optical-like modes associated to the excited states become increasingly damped when temperature is raised, as the occupation factors change the overall response MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000165294600027 L2 - COUPLED QUANTUM-WELLS; MAGNETIC-FIELD; ELECTRONS; HOLES SO - Physica Status Solidi B-Basic Research 2000 ;221(2):797-813 2058 UI - 16053 AU - Vazquez-Padron RI AU - Gonzales-Cabrera J AU - Garcia-Tovar C AU - Neri-Bazan L AU - Lopez-Revilla R AU - Hernandez M AU - Moreno-Fierro L AU - de la Riva GA AD - Ctr Genet Engn & Biotechnol, Havana 10600, CubaCuautitlan UNAM, Mexico City, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Cell Biol, Mexico City 07000, DF, MexicoUNAM, IZTACALA, ENEP, Tlalnepantla, EDO Mexico, MexicoVazquez-Padron, RI, Ctr Genet Engn & Biotechnol, POB 6162, Havana 10600, Cuba TI - Cry1Ac protoxin from Bacillus thuringiensis sp kurstaki HD73 binds to surface proteins in the mouse small intestine AB - Bacillus thuringiensis (Bt), considered a safe insecticide, produces insecticidal proteins named Cry during sporulation, which possess exceptional immunological properties. In this work using an immunohistochemical test we demonstrated that Cry1Ac protoxin (pCry1Ac) binds to the mucosal surface of the mouse small intestine. Ligand blot assay allowed us to detect, under denaturing conditions, six pCry1Ac-binding polypeptides present in brush border membrane vesicles isolated from the small intestine. Moreover, this protein induced in situ temporal changes in the electrophysiological properties of the mouse jejunum. The data obtained indicate a possible interaction in vivo of Cry proteins with the animal bowel which could induce changes in the physiological status of the intestine. (C) 2000 Academic Press MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000086860600009 L2 - ESCHERICHIA-COLI; DELTA-ENDOTOXIN; MANDUCA-SEXTA; MICE SO - Biochemical and Biophysical Research Communications 2000 ;271(1):54-58 2059 UI - 15240 AU - Vazquez-Semadeni E AU - Gazol A AU - Scalo J AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoUniv Texas, Dept Astron, Austin, TX 78712, USAVazquez-Semadeni, E, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - Is thermal instability significant in turbulent galactic gas? AB - We investigate numerically the role of thermal instability (TI) as a generator of density structures in the interstellar medium (ISM), both by itself and in the context of a globally turbulent medium. We consider three sets of numerical simulations: (1) flows in the presence of the instability only; (2) flows in the presence of the instability and various types of turbulent energy injection (forcing), and (3) models of the ISM including the magnetic field, the Coriolis force, self-gravity and stellar energy injection. Simulations in the first group show that the condensation process that forms a dense phase ("clouds") is highly dynamical and that the boundaries of the clouds are accretion shocks, rather than static density discontinuities. The density histograms (probability density functions [PDFs]) of these runs exhibit either bimodal shapes or a single peak at low densities plus a slope change at high densities. Final static situations may be established, but the equilibrium is very fragile: small density fluctuations in the warm phase require large variations in that of the cold phase, probably inducing shocks in the clouds. Combined with the likely disruption of the clouds by Kelvin-Helmholtz instability, this result suggests that such configurations are highly unlikely. Simulations in the second group show that large-scale turbulent forcing is incapable of erasing the signature of TI in the density PDFs, but small-scale, stellar-like forcing causes the PDFs to transit from bimodal to a single-slope power law, erasing the signature of the instability. However, these simulations do not reach stationary regimes, with TI driving an ever-increasing star formation rate. Simulations in the third group show no significant difference between the PDFs of stable and unstable cases and reach stationary regimes, suggesting that the combination of the stellar forcing and the extra effective pressure provided by the magnetic field and the Coriolis force overwhelm TI as a density-structure generator in the ISM, with TI becoming a second-order effect. We emphasize that a multimodal temperature PDF is not necessarily an indication of a multiphase medium, which must contain clearly distinct thermal equilibrium phases, and that this "multiphase" terminology is often inappropriately used MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 47 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000089427600026 L2 - instabilities;ISM : structure;turbulence;2-PHASE GASEOUS SYSTEMS; INTERSTELLAR-MEDIUM; STAR-FORMATION; CLOUD FORMATION; GRAVITATIONAL COLLAPSE; NUMERICAL SIMULATIONS; SUPERNOVA EXPLOSIONS; MOLECULAR CLOUDS; BISTABLE FLUIDS; COOLING FLOWS SO - Astrophysical Journal 2000 ;540(1):271-285 2060 UI - 16500 AU - Vazquez LB AU - Medellin RA AU - Cameron GN AD - Univ Nacl Autonoma Mexico, Inst Ecol, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Cincinnati, Dept Biol Sci, Cincinnati, OH 45221, USAVazquez, LB, Univ Nacl Autonoma Mexico, Inst Ecol, Apartado Postal 27-3, Morelia 58089, Michoacan, Mexico TI - Population and community ecology of small rodents in Montane forest of western Mexico AB - This study reports results of a 14-month live-trap study of small-rodent communities in 2 habitats, cloud forest and disturbed areas, at Las Joyas Scientific Station of the Sierra de Manantlan Biosphere Reserve, western Mexico. Seven taxa of 2 families (Muridae, Heteromyidae) of small rodents were captured (Hodomys alleni, Liomys pictus, Oryzomys couesi, Peromyscus aztecus, Reithrodontomys fulvescens, R. sumichrasti, and Sigmodon alleni). Information about age structure, population dynamics, biomass, and reproduction were obtained with mark-recapture techniques for the most abundant species (P. aztecus and R. fulvescens) in both habitats. These species comprised 80.3% of the 707 captures in the cloud forest (P. aztecus, 51.2%; R, fulvescens, 29.1%), whereas, in the disturbed areas, R. fulvescens represented 81.7% of the 916 captures. Species varied in population density, relative abundance, and timing of reproduction, which was seasonal. Reproductive activity for P. aztecus peaked in the middle of the wet season (September 1995) in the cloud forest and in the wet season and middle of the dry-cold season (January 1996) in the disturbed areas. R. fulvescens showed reproductive activity in the wet season (July-October 1995) in both habitats, Density fluctuated annually for P. aztecus in both habitats, with a peak in January and February 1996; R. fulvescens showed the same patterns of density in both habitats with the highest values at the end of the wet season MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - PROVO: AMER SOC MAMMALOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000085435500007 L2 - cloud forest;community ecology;disturbed areas;population ecology;small rodents;western Mexico;SMALL MAMMALS; EXPERIMENTAL MANIPULATION; SPECIES REMOVAL; DESERT SO - Journal of Mammalogy 2000 ;81(1):77-85 2061 UI - 15792 AU - Vazquez R AU - Lopez-Martin L AU - Miranda LF AU - Esteban C AU - Torrelles JM AU - Arias L AU - Raga AC AD - UNAM, Inst Astron, Ensenada 22860, Baja California, MexicoUNAM, Inst Astron, Circuito Invest Cient, Mexico City 06510, DF, MexicoCSIC, Inst Astrofis Andalucia, Granada 18008, SpainInst Astrofis Canarias, La Laguna 38200, Tenerife, SpainCSIC, Inst Estudis Espacials Catalunya, Barcelona 08034, SpainCSIC, Inst Ciencias Espacio, Barcelona 08034, SpainVazquez, R, UNAM, Inst Astron, Km 103 Carretera Tijuana, Ensenada 22860, Baja California, Mexico TI - Bow-shocks and possible jet-shell interaction in the planetary nebula M 2-48 AB - Deep narrow band CCD images in the Ha, [O III] lambda 5007 Angstrom, [N II] lambda 6584 Angstrom, and [S II] lambda 6717 + 31 Angstrom emission lines have been obtained for the planetary nebula M 2-48. The discovery of a pair of symmetric low-excitation bow-shocks, separated by 4', and forming a highly collimated bipolar outflow, is presented. The bow-shocks are emitting in [O III] and present the ionization structure expected from working surfaces of collimated jets, pointing out that these structures are tracing regions with shocked gas at high velocities (> 100 km s(-1)). In addition, an internal bipolar outflow (60 " x 30 ") and an apparent off-center semi-circular shell (size approximate to 110 ") are also detected. An enhancement of low-excitation line emission is observed in the shell along the outflow axis. This result can be interpreted in terms of a jet-shell interaction MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000087851000034 L2 - ISM : jets and outflows;ISM : planetary nebulae :;individual : M 2-48;EPISODIC JET; BIPOLAR; MICROSTRUCTURES; OUTFLOWS; FLIERS SO - Astronomy and Astrophysics 2000 ;357(3):1031-1034 2062 UI - 16246 AU - Vega-Duran JT AU - Barbosa-Garcia O AU - az-Torres LA AU - Meneses-Nava MA AU - Sumida DS AD - Ctr Invest Opt, Leon 37000, Gto, MexicoHRL Labs, Malibu, CA 90265, USABarbosa-Garcia, O, Ctr Invest Opt, Leon 37000, Gto, Mexico TI - Effects of energy back transfer on the luminescence of Yb and Er ions in YAG AB - The back-energy-transfer process from acceptors to donors is included to predict and explain the nonradiative energy-transfer processes among Yb-Er ions in a YAG matrix. This process is in addition to the direct Yb-to-Er energy transfer and the migration of energy among Yb ions. The two measured Yb transients are well fitted by the corresponding solution of the master equations that give the dynamics of the energy-transfer processes. (C) 2000 American Institute of Physics. [S0003-6951(00)03715-3] MH - Mexico|Guanajuato MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000086296200022 L2 - LASER; EMISSION SO - Applied Physics Letters 2000 ;76(15):2032-2034 2063 UI - 15977 AU - Velazquez-Dimas JI AU - Ehsani MR AU - Saadatmanesh H AD - Univ Autonoma Sinaloa, Mexico City, DF, MexicoUniv Arizona, Tucson, AZ 85721, USAVelazquez-Dimas, JI, Univ Autonoma Sinaloa, Mexico City, DF, Mexico TI - Out-of-plane behavior of brick masonry walls strengthened with fiber composites AB - The vulnerability of unreinforced masonry buildings (URM) to moderate ground motions is a fact recognized by the earthquake engineering commonly. In this paper, an innovative retrofitting system for URM buildings using glass fiber reinforced polymer (GFRP) strips is investigated. The experimental results for four retrofitted URM walls subjected to cyclic out-of-plane loading are presented herein. The first three specimens were constructed in single wythe, and the fourth one in double wythe. The height-thickness ratio for all specimens was 28. Depending on the reinforcement ratio, single wythe walls failed in tension, excessive delamination, or a combination of both. Failure modes in the double wythe wall were peeling off of composite strips and splitting of the wythes. From experimental results, it was found that walls were capable of supporting pressures of up to 25 times their weight and defect up to 1 /20 times the wall height. Strength and deformation capacity of the walls were significantly improved by the investigated retrofitting technique MH - Mexico|Distrito Federal MH - USA PB - FARMINGTON HILLS: AMER CONCRETE INST RP - NOT IN FILE U3 - TC 4 U4 - Construction & Building Technology;Engineering, Civil;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0889-3241 UR - ISI:000087122400002 L2 - flexural strength;masonry;prestressing steel;reinforced concrete;stiffness;CONCRETE SO - Aci Structural Journal 2000 ;97(3):377-387 2064 UI - 14782 AU - Velazquez FR AU - Matson DO AU - Guerrero ML AU - Shults J AU - Calva JJ AU - Morrow AL AU - Glass RI AU - Pickering LK AU - Ruiz-Palacios GM AD - Inst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoChildrens Hosp Kings Daughters, Ctr Pediat Res, Norfolk, VA, USAEastern Virginia Med Sch, Norfolk, VA 23501, USACtr Dis Control & Prevent, Viral Gastroenteritis Unit, Atlanta, GA 30341, USARuiz-Palacios, GM, Inst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Vasco Quiroga 15,Delegac Tlalpan, Mexico City 14000, DF, Mexico TI - Serum antibody as a marker of protection against natural rotavirus infection and disease AB - To determine whether naturally acquired serum IgA and IgG antibodies were associated with protection against rotavirus infection and illness, a cohort of 200 Mexican infants was monitored weekly for rotavirus excretion and diarrhea from birth to age 2 years. Serum samples collected during the first week after birth and every 4 months were tested for antirotavirus IgA and IgG. Children with an IgA titer >1:800 had a lower risk of rotavirus infection (adjusted relative risk [aRR], 0.21; P < .001) and diarrhea (aRR, 0.16; P = .01) and were protected completely against moderate-to-severe diarrhea, However, children with an IgG titer >1:6400 were protected against rotavirus infection (aRR, 0.51; P <, .001) but not against rotavirus diarrhea. Protective antibody titers were achieved after 2 consecutive symptomatic or asymptomatic rotavirus infections. These findings indicate that serum anti-rotavirus antibody, especially IgA, was a marker of protection against rotavirus infection and moderate-to-severe diarrhea MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 45 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000165596100004 L2 - NATURALLY ACQUIRED ROTAVIRUS; DAY-CARE-CENTERS; YOUNG-CHILDREN; IMMUNE-RESPONSES; NORWALK VIRUS; DIARRHEA; VACCINE; INFANTS; ACQUISITION; MICE SO - Journal of Infectious Diseases 2000 ;182(6):1602-1609 2065 UI - 15263 AU - Velez-Ruiz JF AU - Barbosa-Canovas GV AD - Washington State Univ, Dept Biol Syst Engn, Pullman, WA 99164, USAUniv Amer Puebla, Chem & Food Engn Dept, Puebla 72820, MexicoBarbosa-Canovas, GV, Washington State Univ, Dept Biol Syst Engn, Pullman, WA 99164 USA TI - Flow and structural characteristics of concentrated milk AB - The flow and structural characteristics of concentrated milk were analyzed between concentrations of 12.5 and 46.7% solids content at room temperature. The rheological behavior of milk concentrates was represented by parameters corresponding to Newtonian, Power Law, or Herschel-Bulkley equations depending on the solids content level. The resulting flow behavior indices and consistency coefficients were correlated to concentration by a single-term exponential equation, with only milk concentrates above 40% solids content exhibiting yield stress. Milk concentrates were characterized by scanning electron microscopy (SEM), complemented by transmission electron microscopy (TEM) and image analysis (IA). Casein micelles appeared as granular particles (0.1-0.3 mu m) with a rough surface. Fat globules, noted as small holes in the SEM pictures, appeared to be major spherical components (0.5-10 mu m) in the transmission electron microscope images as well as in the image analysis inverted micrographs. Fat globules in the milk concentrates were surrounded by a membrane which was thicker in the concentrated milk than in the fresh milk. TEM images were very helpful in observing the interparticle interactions, as well as the thickness of the fat membranes that corroborated with the SEM observations. The IA pictures allowed the identification and characterization of the fat globule features MH - Mexico|Puebla MH - USA PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 8 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-4901 UR - ISI:000089307700006 L2 - SWEETENED CONDENSED MILK; FAT GLOBULE-MEMBRANE; ELECTRON-MICROSCOPY; SKIM-MILK; CASEIN MICELLES; WHOLE MILK; STORAGE; TEMPERATURE; PROTEIN; RHEOLOGY SO - Journal of Texture Studies 2000 ;31(3):315-333 2066 UI - 16407 AU - Venegas V AU - Ortiz-Lopez J AU - Rueda-Morales G AU - Caleyo F AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv La Habana, Fac Fis, La Habana 10400, CubaOrtiz-Lopez, J, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edif 9,UP Adolfo Lopez Mateos,Col Lindavista, Mexico City 07738, DF, Mexico TI - Synthesis and characterization of Hg metal-doped C-60 AB - Synthesis of the new fulleride HgxC60 Was achieved inside an evacuated ampoule filled with metallic Hg and C-60 powder kept at 500 degrees C for several months. A heat capacity anomaly is observed at 232.3 K, reminiscent of the ordering transition of pristine C-60 but With reduced transition enthalpy. Weakly shifted F-1u infrared bands suggest lack of Hg-C-60 charge transfer. The structure at 300 K is as in pristine C-60 but with a measurable lattice expansion consistent with Hg intercalation in octahedral sites. This lattice expansion induces downshift of the ordering transition and weak displacement of infrared bands. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000085722600025 L2 - SOLID C60; SUPERCONDUCTIVITY; INTERCALATION; DEPENDENCE; FULLERENE; ORDER; FILMS SO - Chemical Physics Letters 2000 ;318(6):655-661 2067 UI - 14048 AU - Vente JF AU - Plaisier JR AU - Ijdo DJW AU - Kamenev KV AD - CINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoLeiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, NetherlandsUniv Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, ScotlandVente, JF, CINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, Carretera Ant Progreso Km 6,Apartado Postal 73, Merida 97310, Yucatan, Mexico TI - Preparation and crystallographic properties of Sr7-x(Ca/Ba)(x)Mn4O15 AB - Polycrystalline samples of the new phases Sr(7-x)A(x)Mn(4)O(15) (A = Ca, Ba; 0 less than or equal to x less than or equal to 1) and Sr7-2xCaxBaxMn4O15 (0 less than or equal to x less than or equal to 1)have been characterized by X-ray powder diffraction. Apart from changes in the cell parameters, no significant alterations of the crystal structure are found upon doping with Ca and/or Ba. The application of chemical pressure causes an anisotropic change of the unit cell with the a (Ca) and b (Ba) axes showing the largest changes. The compounds with double-doping Sr7-2xCaxBaxMn4O15 show a more complicated behavior. The cell volume is linear dependent on the average ionic radius of the A-cation, for all compounds. Ca enters the structure on the small Sr(1) site, whereas Ba occupies the larger Sr(3) and Sr(4) sites. The results show that the structure of Sr7Mn4O15 is flexible with respect to the average size of the A-cation. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Yucatan MH - Netherlands MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000167765300026 L2 - electronic materials;oxides;X-ray diffraction;crystal structure;RUDDLESDEN-POPPER COMPOUND; COLOSSAL MAGNETORESISTANCE; GIANT MAGNETORESISTANCE; CA4MN3O10 SO - Materials Research Bulletin 2000 ;35(14-15):2437-2444 2068 UI - 15674 AU - Vente JF AU - Battle PD AD - Univ Oxford, Inorgan Chem Lab, Oxford OX1 3QR, EnglandIPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, Merida 97310, Yucatan, MexicoBattle, PD, Univ Oxford, Inorgan Chem Lab, S Parks Rd, Oxford OX1 3QR, England TI - Structural Chemistry and Electronic Properties of the hexagonal perovskites BaIr1-xCoxO3-delta (x = 0.5, 0.7, 0.8) AB - The room temperature crystal structures of three compositions in the system BaIr1-xCoxO3-delta (x = 0.5, 0.7, 0.8) have been determined from X-ray and neutron powder diffraction data. BaIr0.5C0.5O3.02(1), BaIr0.3Co0.7O2.84(1), and BaIr0.2Co0.8O2.83(1) adopt 12R, 10H, and 5H perovskite structures, respectively; the distribution of Co and Ir cations over corner-sharing and face-sharing sites has been determined, and the Co/Ir-O bond lengths have been used to assign the cation oxidation states as Ir5+ and Co3+/Co4+. Arguments based on bond lengths and magnetic susceptibility data have been used to assign spin states; at room temperature BaIr0.5Co0.5O3-delta contains both high-spin and low-spin Co3+, The distribution of anion vacancies has been determined for x = 0.7, 0.8; in the latter case there is evidence for the replacement of some BaO3 layers in the pseudo-hcp structure by BaO2 layers, thus introducing tetrahedral transition metal sites which are found to be occupied by Co, Neutron diffraction experiments carried out at 5 K revealed a monoclinic distortion in the x = 0.5 sample, with the environment of the high-spin Co3+ cation undergoing a Jahn-Teller distortion. The structures of the x = 0.7, 0.8 phases did not change significantly on cooling. Measurements of magnetization as a function of applied field suggest that spin glass or cluster glass behavior is present in x = 0.5, 0.7 below 50 K, In the case of x = 0.8, magnetization and neutron diffraction data suggest the formation of a weak ferromagnet with a saturation magnetization of 0.60 mu(B) per Co cation at 5K, (C) 2000 Academic Press MH - United Kingdom MH - Mexico|Yucatan PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000088056400006 L2 - perovskite;iridium;cobalt;NEUTRON-DIFFRACTION; MAGNETIC-PROPERTIES; CRYSTAL SO - Journal of Solid State Chemistry 2000 ;152(2):361-373 2069 UI - 16102 AU - Ventura CI AU - Barrio RA AD - CONICET, Ctr Atom Bariloche, RA-8400 Bariloche, Rio Negro, ArgentinaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoVentura, CI, CONICET, Ctr Atom Bariloche, RA-8400 Bariloche, Rio Negro, Argentina TI - Self-consistent cluster CPA methods and the nested CPA theory AB - The coherent potential approximation (CPA), is a useful tool to treat systems with disorder. Cluster theories have been proposed to go beyond the translation invariant single-site CPA approximation and include some short-range correlations. In this framework one can also treat simultaneously diagonal disorder (in the site-diagonal elements of the Hamiltonian) and non-diagonal disorder (in the bond energies). It proves difficult to obtain reasonable results, free of non-analyticities, for lattices of dimension higher than one (D > 1). We show electronic structure results obtained for a Hubbard model, treated in mean-field approximation, on a square lattice and a simple cubic lattice, with the simultaneous inclusion of diagonal and non-diagonal disorder. We compare the results obtained using three different methods to treat the problem: a self-consistent 2-site cluster CPA method, the Blackman-Esterling-Berk single-site like extension of the CPA and a nested CPA approach. (C) 2000 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000086570200360 L2 - disorder;coherent potential approximation;cluster theories;LATTICE GREENS FUNCTION; MEAN-FIELD THEORY; BINARY-ALLOYS; SYSTEMS; COHERENT SO - Physica B-Condensed Matter 2000 ;281():855-856 2070 UI - 15364 AU - Venturelli CR AU - Kuznetsov S AU - Salgado LM AU - Bosch TCG AD - Inst Politecn Nacl, CINVESTAV, Dept Genet, Mexico City 07000, DF, MexicoUniv Jena, Inst Spezielle Zool & Evolut Biol, D-07743 Jena, GermanyBosch, TCG, Univ Kiel, Inst Zool, Biozentrum, Bot Garten 9, D-24098 Kiel, Germany TI - An IQGAP-related gene is activated during tentacle formation in the simple metazoan Hydra AB - Differentiation of body column epithelial cells into tentacle epithelial cells in Hydra is accompanied by changes in both cell shape and cell-cell contact. The molecular mechanism by which epithelial cells acquire tentacle cell characteristics is unknown. Here we report that expression of a Hydra homologue of the mammalian IQGAP1 protein is strongly upregulated during tentacle formation. Like mammalian IQGAP, Hydra IQGAP1 contains an N-terminal calponin-homology domain, IQ repeats and a conserved C terminus. In adult polyps a high level of Hydra IQGAP1 mRNA is detected at the basis of tentacles. Consistent with a role in tentacle formation, IQGAP1 expression is activated during head regeneration and budding at a time when tentacles are emerging. The observations support the previous hypothesis that IQGAP proteins are involved in cytoskeletal as well as cell-cell contact rearrangements MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Cell Biology;Evolutionary Biology;Developmental Biology U5 - J;Article AV - English IS - 0949-944X UR - ISI:000089072800007 L2 - cnidaria;IQGAP;Hydra;cytoskeleton;regeneration;SMALL GTPASES; IDENTIFICATION; PROTEIN; HOMOLOG; TARGET; CYTOKINESIS; YEAST; CDC42; CELL; RAC1 SO - Development Genes and Evolution 2000 ;210(8-9):458-463 2071 UI - 16503 AU - Verdeja LF AU - Gonzalez R AU - Ordonez A AD - Univ Oviedo, ETSIMO, Catedra Siderurgia, Oviedo 33004, SpainUniv Panamer, Escuela Ingn, Mexico City, DF, MexicoVerdeja, LF, Univ Oviedo, ETSIMO, Catedra Siderurgia, Independencia 13, Oviedo 33004, Spain TI - Using FEM to determine temperature distribution in a blast furnace crucible AB - Temperature distribution in the crucible of a blast furnace is an important operation variable that is a function of the materials used in its construction, temperatures reached in the pig iron-refractory interface, and cooling-system performance. Defining the crucible zones where high shear and tensile stresses are reached is an important step in developing a tribological model to understand and predict high wear zones and crucible life. In this work, temperature distribution was simulated using the finite-element method for a blast furnace built following the ceramic solution (oxide and nitride ceramics in contact with the pig iron and carbon and microporous graphite blocks in contact with the refrigeration system) MH - Mexico|Distrito Federal MH - Spain PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 1047-4838 UR - ISI:000085389000013 SO - Jom-Journal of the Minerals Metals & Materials Society 2000 ;52(2):74-77 2072 UI - 15822 AU - Verdu M AD - Univ Nacl Autonoma Mexico, ENEP, UBIPRO Lab, Mexico City 54090, DF, MexicoVerdu, M, CSIC,UV,GV, Ctr Invest Desertificac, Cami Marjal S-N,Apartado Oficial, Valencia 46470, Spain TI - Ecological and evolutionary differences between Mediterranean seeders and resprouters AB - Differences in allocation patterns between seeders and resprouters in several Mediterranean plant communities (Australia, California and South Africa) have led to the prediction that seedlings of seeders grow faster than those of resprouters. In the Mediterranean Basin, it has also been hypothesized that regeneration strategy of plants after fire is associated with several other life history traits. This paper tests both hypotheses for the dominant plants in the Mediterranean Basin from literature data. Results show that seeders from the Mediterranean Basin grow significantly faster and allocate more biomass to leaf plus paracotyledons than resprouters. Seeders are mainly non-sclerophyllous, anemochorous, dry-fruited, small-seeded species that evolved in the Quaternary (post-Pliocene) and are associated with earlier successional stages. Resprouters are mainly sclerophyllous, vertebrate-dispersed, fleshy-fruited, large-seeded species that evolved in the Tertiary (pre-Pliocene) and are associated with late successional stages MH - Mexico|Distrito Federal MH - Spain PB - UPPSALA: OPULUS PRESS UPPSALA AB RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1100-9233 UR - ISI:000087726700012 L2 - fire;Mediterranean shrubland;seedling growth;SEEDLING DYNAMICS; FIRE; GERMINATION; GROWTH; CALIFORNIA; ECOSYSTEMS; PLANTS; LEGUMINOSAE; VEGETATION; RESEEDERS SO - Journal of Vegetation Science 2000 ;11(2):265-268 2073 UI - 15731 AU - Verma MP AU - Quijano JL AU - Johnson C AU - Gerardo JY AU - Arellano V AD - Inst Invest Elect, Cuernavaca 62001, Morelos, MexicoComis Fed Elect, Morelia, Michoacan, MexicoUS Geol Survey, Denver, CO 80225, USAInt Atom Energy Agcy, Dept Res & Isotopes, Vienna, AustriaVerma, MP, Inst Invest Elect, AP 1-475, Cuernavaca 62001, Morelos, Mexico TI - Origin of rainwater acidity near the Los Azufres geothermal field, Mexico AB - The chemical and isotopic compositions of rainwater were monitored at Los Azufres geothermal field (88 MWe) and its surroundings during May - September 1995, which is the rainy season. Samples were collected from eight sites: three within the held, three in its surroundings and two sufficiently far from the field such that they have no geothermal input. The concentrations of Cl-, SO42- and NO3- were measured in about 350 samples and found to be generally <5 ppm. Chloride concentrations remained constant with time, but sulfate and nitrate concentrations decreased, which suggests a nearby industrial source for the sulfate and nitrate. A mixing model for Cl-, SO42- and delta(34)S also suggests an industrial source for the rainwater sulfur. The determination of pH was found to be necessary, but is not sufficient to characterize rainwater acidity. The Gran titration method was used to determine alkalinity with respect to equivalence point of H2CO3*. Values of alkalinity were found to range from 10(-4) to 10(-6) eq/L, and were negative only for some samples from Vivero and Guadalajara. Thus, SO42- and NO3- are in general not in acidic form (i.e. balanced by Na+, Ca2+, etc. rather than H+). Sulfate delta(34)S values were about -1.5 parts per thousand in Los Azufres and its surroundings, and in Morelia, but differed from the value of -0.2 parts per thousand for Guadalajara. The delta(34)S values for H2S from the Los Azufres geothermal wells are in the range -3.4 to 0.0 parts per thousand. The delta(34)S ranges for the natural and anthropogenic sources for environmental sulfur overlap, making it difficult to differentiate between the contribution of different sources. However, a similarity of values of delta(34)S at Los Azufres and Morelia (85 km distant) suggest a regional source of sulfate that is not associated with geothermal emissions from Los Azufres. (C) 2000 Published by Elsevier Science Ltd on behalf of CNR MH - Austria MH - Mexico|Michoacan MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Energy & Fuels;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0375-6505 UR - ISI:000087934300011 L2 - rainwater;chemistry;isotope;sulfur-34;alkalinity;Los Azufres;Mexico;ISOTOPIC COMPOSITION; SULFUR; SULFATE; ISRAEL; AIR SO - Geothermics 2000 ;29(4-5):593-608 2074 UI - 15723 AU - Verma SP AU - Garcia R AU - Santoyo E AU - Aparicio A AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoCSIC, Museo Nacl Ciencias Nat, Dept Volcanol, E-28006 Madrid, SpainVerma, SP, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Priv Xochicalso S-N,Col Ctr,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Improved capillary electrophoresis method for measuring rare-earth elements in synthetic geochemical standards AB - An improved capillary electrophoresis (CE) method for quantifying rare-earth elements (REEs) in synthetic geochemical standards was developed. Synthetic standard solutions were obtained from high purity metal oxides. The separation of REE total group (lanthanum to lutetium) was defined as a primary objective. Special attention was also focused on the optimized separation of europium (Eu) and gadolinium (Gd) because in earlier applications they presented overlapping problems. Their separation and quantitative determinations are essential for geological applications. For the rapid separation of REEs in synthetic geochemical standards, the temperature of the separation device was optimized. An analysis temperature of 15 degrees C enabled both the rapid separation of REEs within 2 min and the overlapping problem of Eu-Gd to be resolved. The detection limits (<0.1 ng) and precision estimates (generally better than 5%) were found to be satisfactory for most geological applications. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000087940400034 L2 - geochemistry;rare earth elements;lanthanides;metal cations;PERFORMANCE LIQUID-CHROMATOGRAPHY; CHELATION ION CHROMATOGRAPHY; ZONE-ELECTROPHORESIS; MASS-SPECTROMETRY; SEPARATION EFFICIENCY; GEOLOGICAL-MATERIALS; REFERENCE SAMPLES; LANTHANIDES; ROCKS; YTTRIUM SO - Journal of Chromatography A 2000 ;884(1-2):317-328 2075 UI - 16537 AU - Verma SP AD - Max Planck Inst Chem, Abt Geochem, Mainz, GermanyVerma, SP, UNAM, Priv Xochicalco S Col Cent Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemical evidence for a lithospheric source for magmas from Los Humeros caldera, Puebla, Mexico AB - This study reports new geochemical and Sr-Nd-Pb radiogenic isotope data on hy-normative Quaternary basaltic to rhyolitic volcanic rocks as well as two samples of Mesozoic to Palaeozoic intrusive igneous rocks from Los Humeros caldera (LHC), located in the eastern part of the Mexican Volcanic Belt (MVB). The isotopic ratios of mafic basaltic rocks range as follows: Sr-87/Sr-86 = 0.703350-0.703387, Nd-143/Nd-144 = 0.512867-0.512888, Pb-206/Pb-204 = 18.849-18.866, Pb-207/Pb-204 = 15.593-15.598, and Pb-208/Pb-204 = 38.490-38.491. These values are similar to the rift-related mafic rocks from the volcanic front of the central MVB. For comparison, the entire suite from basalt (B) to rhyolite (R) in the LHC shows the following ranges. Sr-87/Sr-86 = 0.703350-0.704678, Nd-143/Nd-144 = 0.512702-0.512888, Pb-206/Pb-204 = 18.710-18.866, Pb-207/Pb-204 = 15.593-15.631, and Pb-208/Pb-204 = 38.444-38.594. The basaltic rocks from Los Humeros do not show the characteristic negative Nb anomaly with respect to Ba and Ce, as is typical of such magmas in volcanic arcs. The available geochemical and isotopic evidence does not support the generation of the LHC mafic magmas by direct (slab melting), nor by indirect (fluid transport to the mantle) participation of the subducted Cocos plate. Instead, they could be generated in the upper mantle from a lithospheric source. The evolved andesitic to rhyolitic magmas could have been originated from such mafic magmas through assimilation coupled with extensive fractional crystallisation. Two different compositions representing lower (LC) and upper crusts (UC) as well as a hypothetical crust (HA) were tested as plausible assimilants for the assimilation coupled with fractional crystallisation process. (C) 2000 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000085203500003 L2 - Mexican Volcanic Belt;Mexico;isotopes;calderas;rift;subduction;SAN-LUIS-POTOSI; RARE-EARTH ELEMENT; QUATERNARY VOLCANIC CENTERS; TRACE-ELEMENT; CALC-ALKALINE; HIGH-PRESSURE; PARTITION-COEFFICIENTS; FRACTIONAL CRYSTALLIZATION; TECTONIC IMPLICATIONS; CRUSTAL ASSIMILATION SO - Chemical Geology 2000 ;164(1-2):35-60 2076 UI - 14568 AU - Victal O AU - Gaxiola E AU - Najar S AU - Teerlink JR AU - Camacho DH AU - Gutierrez A AU - Herrera G AU - Zuniga G AU - Mercado-Rios F AU - Wallace AW AU - Ratcliffe MB AD - Hosp Especialidades CMNO IMSS, Guadalajara, Jalisco, MexicoInst Mexicano Seguro Social, Guadalajara, Jalisco, MexicoUniv Calif San Francisco, Vet Adm Med Ctr, San Francisco, CA, USA TI - Radiofrequency heating of chronic myocardial infarction in patients with congestive heart failure results in sustained left ventricular volume reduction MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000090072302438 SO - Circulation 2000 ;102(18):503-503 2077 UI - 15572 AU - Vigil O AU - Cruz F AU - Santana G AU - Vaillant L AU - Morales-Acevedo A AU - Contreras-Puente G AD - IPN, CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Mexico City 07360, DF, MexicoIPN, Escuela Super Fis & Matemat, UP ALM Lindavista, Mexico City 07738, DF, MexicoUniv Havana, IMRE, Fac Fis, Havana 43100, CubaMorales-Acevedo, A, IPN, CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Avenida IPN 2508, Mexico City 07360, DF, Mexico TI - Influence of post-thermal annealing on the properties of sprayed cadmium-zinc oxide thin films AB - We have prepared (ZnO)(x)(CdO)(1-x) thin films by spray pyrolysis. Mixed thin film oxides with different compositions of cadmium and zinc were deposited on glass substrates and exposed to different annealing treatments at a fixed temperature. The effects due to post-thermal annealing on the structural, optical and electrical properties of the variable composition thin films have been studied depending upon the x value. The crystalline structure was studied by X-ray diffraction (XRD). We found the presence of CdO XRD patterns for low Zn concentrations, and a mixing of CdO (cubic) and ZnO (hexagonal) phases for low Cd concentrations. In all cases. the crystallite sizes increased with the annealing. In addition, the band-gap and the resistivity vary between those found for pure CdO and ZnO. The changes of the latter parameters with the post-thermal annealing are studied also as a function of the x value. (C) 2000 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000088469700005 L2 - (ZnO)(x)(CdO)(1-x);spray pyrolysis;post-thermal annealing SO - Applied Surface Science 2000 ;161(1-2):27-34 2078 UI - 16345 AU - Vigil O AU - Zelaya-Angel O AU - Rodriguez Y AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07360, DF, MexicoUniv Havana, Phys Fac IMRE, Havana 10400, CubaZelaya-Angel, O, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, POB 14-740, Mexico City 07360, DF, Mexico TI - Changes of the structural and optical properties of cubic CdS films on annealing in H-2 and air atmospheres AB - Structural and optical properties of as-grown cubic CdS polycrystalline films annealed in H-2 and air atmospheres are reported. The CdS films were grown onto glass substrates by chemical-bath deposition. The forbidden band-gap and the x-ray diffraction spectrum evolution as a function of the thermal annealing temperature, in H-2 and air ambients, were studied. Band-gap shift and changes in grain size, lattice parameter and crystalline structure were influenced by the type of atmosphere and the temperature of the thermal annealing. From these results, the dependence of the band-gap on the lattice parameter was determined MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000085942800007 L2 - BAND-GAP SHIFT; THIN-FILMS; RESISTIVITY SO - Semiconductor Science and Technology 2000 ;15(3):259-262 2079 UI - 16448 AU - Vigil O AU - Vaillant L AU - Cruz F AU - Santana G AU - Morales-Acevedo A AU - Contreras-Puente G AD - IPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City, DF, MexicoUniv Havana, Fac Fis, IMRE, La Habana 43100, CubaIPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoMorales-Acevedo, A, IPN, CINVESTAV, Dept Ingn Elect, SEES, Apartado Postal 14-740, Mexico City, DF, Mexico TI - Spray pyrolysis deposition of cadmium-zinc oxide thin films AB - Mixed thin film oxides of cadmium and zinc with different compositions were deposited on glass substrates by spray pyrolysis. The effect of the various parameters on the growth and on the film properties is presented. The sample structure was studied by X-ray diffraction (XRD) having found the presence of a cubic phase resembling that of pure CdO XRD pattern for low Zn concentrations. For x = 0.75 a low crystallinity of the ZnO structure was observed. Optical band-gap was also studied from optical transmittance measurements. As expected, the band-gap values change between those of pure CdO and those of ZnO. (C) 2000 Published by Elsevier Science S.A. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 32 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000085457900010 L2 - spray pyrolysis;X-ray diffraction;optical band-gap;transparent conducting oxides SO - Thin Solid Films 2000 ;361():53-55 2080 UI - 15692 AU - vila-Sakar G AU - Dominguez CA AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoAvila-Sakar, G, Penn State Univ, Dept Biol, 208 Mueller Lab, University Pk, PA 16802 USA TI - Parental effects and gender specialization in a tropical heterostylous shrub AB - Male sterility in hermaphroditic species may represent the first step in the evolution toward dioecy. However, gender specialization will not proceed unless the male-sterile individuals compensate for fitness lost through the male function with an increase in fitness through the female function. In the distylous shrub Erythroxylum havanense, thrum plants are partially male-sterile. Using data collected throughout eight years, we investigated whether thrum individuals have an increased performance as female parents, thereby compensating for their loss of male fitness. We found that thrum plants outperformed pins in the probabilities of seed maturation and germination and long-term growth of the seedlings. In turn, pollen from pin plants achieved greater pollen tube growth rates. Our results suggest that the superior performance of the progeny of thrum maternal plants is a consequence of better seed provisioning via effects of the maternal environment, cytotype or nuclear genes. Overall, our results suggest that E. havanense is evolving toward a dioecious state through a gynodioecious intermediate stage. This evolutionary pathway is characterized by an unusual pattern of gender dimorphism with thrums becoming females and pins becoming males. We propose that this pattern may be better explained by the interaction between male-sterility cytoplasmic genes and the heterostyly supergene MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000088090600014 L2 - gynodioecy;heterostyly;male sterility;maternal effects;pollen performance;resource allocation;SILENE-ACAULIS CARYOPHYLLACEAE; CYTOPLASMIC MALE-STERILITY; OREGANA SSP SPICATA; THYMUS-VULGARIS L; SEXUAL SELECTION; ERYTHROXYLUM HAVANENSE; SEED PRODUCTION; REPRODUCTIVE ALLOCATION; RESOURCE COMPENSATION; INBREEDING DEPRESSION SO - Evolution 2000 ;54(3):866-877 2081 UI - 14878 AU - Viliesid M AU - Gutierrez-Munguia M AU - Galvan CA AU - Castillo HA AU - Madej A AU - Hall JL AU - Stone J AU - Chartier A AU - Chartier JM AD - Ctr Nacl Metrol, Queretaro 76900, MexicoNatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, CanadaUniv Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309, USANatl Inst Stand & Technol, Gaithersburg, MD 20899, USABur Int Poids & Mesures, F-92312 Sevres, FranceViliesid, M, Ctr Nacl Metrol, Km 4-5 Carretera Los Cues,Municipio Marques, Queretaro 76900, Mexico TI - International comparisons of He-Ne lasers stabilized with I-127(2) at lambda approximate to 633 nm - Part VII: Comparison of NORAMET I-127(2)-stabilized He-Ne lasers at lambda approximate to 633 nm AB - This paper reports the seventh set of results of a series of grouped laser comparisons from national laboratories undertaken by the Bureau International des Poids et Mesures (BIPM) at the request of the Comite Consultatif pour la Definition du Metre (CCDM, now the Consultative Committee for Length, CCL), during the periods July 1993 to September 1995 and March to July 1997. The results of this comparison, involving six lasers from three countries of North America and from the BIPM, meet the goals set by the CCDM in 1992 and adopted by the Comite International des Poids et Mesures (CIPM) the same year. The standard uncertainty (1 sigma) of the frequency of the He-Ne laser stabilized on the saturated absorption of I-127(2) at lambda approximate to 633 nm is reduced to a level of 12 kHz (2.5 x 10(-11)) when the lasers compared meet the recommended values of the parameters. The lasers were first compared with the BIPMP3 laser, with all the lasers set to the parameter values normally used in each laboratory; the results then ranged from -10.1 kHz to 19.0 kHz. After checking and correcting the values of all the parameters, the range was reduced to -10.6 kHz to +2.6 kHz. Under the latter conditions, the average frequency difference of the group of lasers, with respect to the BIPM4 laser, was +0.3 kHz with a standard uncertainty (1 sigma) of 5.3 kHz. The best relative frequency stabilities, with Allan standard deviations of about 6.2 x 10(-12), 5.1 x 10(-13) and 1.4 x 10(-13), were observed with sampling times of 1 s, 100 s and 1000 s, respectively. The overall best value was 9.1 x 10(-14) for a sampling time of 10 000 s MH - Canada MH - France MH - Mexico|Queretaro MH - USA PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 7 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000165333600009 L2 - SEPTEMBER 1995; JULY 1993; LAMBDA-APPROXIMATE-TO-633 NM; EUROPEAN LASERS; IODINE CELLS; STANDARDS; BIPM SO - Metrologia 2000 ;37(4):317-322 2082 UI - 15755 AU - Villalon CM AU - Centurion D AU - Bravo G AU - De Vries P AU - Saxena PR AU - Ortiz MI AD - CINVESTAV, IPN, Dept Farmacol, Mexico City 14000, DF, MexicoErasmus Univ, Dept Pharmacol, Fac Med & Hlth Sci, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, CINVESTAV, IPN, Dept Farmacol, Apdo Postal 22026, Mexico City 14000, DF, Mexico TI - Further pharmacological analysis of the orphan 5-HT receptors mediating feline vasodepressor responses: close resemblance to the 5-HT7 receptor AB - It has been suggested that the late hypotensive response to serotonin (5-hydroxytryptamine; 5-HT) in vagosympathectomised cats, being potently mimicked by 5-carboxamidotryptamine (5-CT), not modified by ketanserin and blocked by methiothepin or methysergide, is mediated by '5-HT1-like' receptors. Nevertheless, current guidelines for 5-HT receptor classification refer to this receptor as an orphan receptor. Thus, the present study set out to reanalyse the above suggestion in terms of the classification schemes proposed in 1994 and 1998 by the NC-IUPHAR subcommittee on the classification of 5-HT receptors. Intravenous (i.v.) bolus injections of 5-CT (0.003-0.3 mu g/kg), 5-HT (1-100 mu g/kg) and 5-methoxytryptamine (5-MeO-T; 1-100 mu g/kg) produced dose-dependent vasodepressor responses with a rank order of agonist potency of 5-CT >> 5-HT = 5-MeO-T with sumatriptan (10-300 mu g/kg) virtually inactive. The vasodepressor responses to 5-HT, 5-CT and 5-MeO-T were not attenuated following i.v. administration of the antagonists GR127935 (5-HT1B/1D; 30 mu g/kg), tropisetron (5-HT3/4; 3000 mu g/kg), (+/-)-pindolol (beta-adrenergic and 5-HT1A; 4000 mu g/kg) or equivalent volumes of physiological saline. In contrast, the above vasodepressor responses were markedly and specifically antagonised by i.v. methiothepin (100 mu g/kg), lisuride (30 mu g/kg and 100 mu g/kg), mesulergine (300 mu g/kg and 1000 mu g/kg) or LY215840 (300 mu g/kg and 1000 mu g/kg). The above lines of evidence, therefore, indicate that the orphan receptors mediating the vasodepressor responses to 5-HT in vagosympathectomised cats are pharmacologically similar to other 5-HT7 receptors mediating vascular and non-vascular responses (e.g. relaxation of the canine external carotid artery and guinea-pig ileum as well as feline tachycardia) MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000087883100013 L2 - blood pressure;GR127935;hypotension;5-hydroxytryptamine;LY215840;5-HT7 receptor;cat;sumatriptan;EXTERNAL CAROTID VASOCONSTRICTION; SEROTONIN RECEPTOR; VAGOSYMPATHECTOMIZED DOGS; 5-HT1-LIKE RECEPTORS; ADENYLATE-CYCLASE; MOLECULAR-CLONING; SMOOTH-MUSCLE; HIGH-AFFINITY; 5-HYDROXYTRYPTAMINE RECEPTOR; OPERATIONAL CHARACTERISTICS SO - Naunyn-Schmiedebergs Archives of Pharmacology 2000 ;361(6):665-671 2083 UI - 15924 AU - Villanueva P AU - Ramadurai SM AU - Pham LD AU - Nielsen HC AD - Hosp Infantil Mexico Feder Gomez, Mexico City, DF, MexicoFloating Hosp Children, New England Med Ctr, Boston, MA, USA TI - Expression and activation of specific protein kinase C isoforms during development of fibroblast type II cell communication in fetal lung MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000086155300462 SO - Pediatric Research 2000 ;47(4):78A-78A 2084 UI - 15827 AU - Villanueva VM AU - Govaerts J AU - Lucio-Martinez JL AD - Univ Michoacana, Inst Fis & Matemat, Morelia, Michoacan, MexicoUniv Catholique Louvain, Inst Phys Nucl, B-1348 Louvain, BelgiumUniv Guanajuato, Inst Fis, Leon 37150, MexicoVillanueva, VM, Univ Michoacana, Inst Fis & Matemat, POB 2-82, Morelia, Michoacan, Mexico TI - Quantization without gauge fixing: avoiding Gribov ambiguities through the physical projector AB - The quantization of gauge invariant systems usually proceeds through some gauge fixing procedure of one type or another. Typically for most cases, such gauge fixings are plagued by Gribov ambiguities, while it is only for an admissible gauge fixing that the correct dynamical description of the system is represented, especially with regards to nonperturbative phenomena. However, any gauge fixing procedure whatsoever may be avoided altogether, by using rather a recently proposed new approach based on the projection operator onto physical gauge invariant states only, which is necessarily free of any such issues. These different aspects of gauge invariant systems are explicitly analysed within a solvable U(1) gauge invariant quantum mechanical model related to the dimensional reduction of Yang-Mills theory MH - Belgium MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000087761700021 L2 - DYNAMICAL-SYSTEMS; CONSTRAINTS; 1ST-CLASS; BOSON SO - Journal of Physics A-Mathematical and General 2000 ;33(22):4183-4202 2085 UI - 15764 AU - Villarreal G AU - Ohlsson J AU - Cavazos H AU - Abrahamsson M AU - Sjostrand J AU - Trevino E AD - UANL, Univ Hosp, Dept Ophthalmol, Monterrey, MexicoUniv Gothenburg, Dept Ophthalmol, Inst Clin Neurosci, Gothenburg, Sweden TI - Prevalence of myopia among teenagers in Monterrey: An epidemiologic study of ocular refraction in Mexico MH - Mexico|Nuevo Leon MH - Sweden PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000086246701575 SO - Investigative Ophthalmology & Visual Science 2000 ;41(4):S299-S299 2086 UI - 16220 AU - Villarreal MG AU - Ohlsson J AU - Abrahamsson M AU - Sjostrom A AU - Sjostrand J AD - Gothenburg Univ, Inst Clin Neurosci, Vis Res Unit, Gothenburg, SwedenUANL, Fac Med, Dept Ophthalmol, Monterrey, MexicoUniv Hosp, UANL, Monterrey, MexicoAbrahamsson, M, Sahlgrenska Univ Hosp Molndal, Inst Clin Neurosci, Vis Res Unit, SE-43180 Molndal, Sweden TI - Myopisation: The refractive tendency in teenagers. Prevalence of myopia among young teenagers in Sweden AB - Purpose: 1045 children between 12 and 13 years old were examined in a field study in the Goteborg area (Sweden), The aim of this study was to report the prevalence of refractive errors, with special attention to myopia, since there are no previous reports in Sweden about this age group. Methods: The examination included visual acuity testing and refraction under cycloplegia. Results: We found a prevalence of myopia (greater than or equal to-0.5D) of 49.7% and a prevalence of bilateral myopia of 39%. In the whole population, 23.3% were considered to need glasses (greater than or equal to-0.75D). We also found a prevalence of high myopia (greater than or equal to-5D) in 2.5% of the children. Discussion: No statistically significant difference in myopia with respect to gender was found. The proportion of children needing glasses is considered the best indicator of the prevalence of myopia in this sample. The results confirm that this tendency towards myopisation in a teenage population in Goteborg is similar to the prevalence found in other parts of the world MH - Mexico|Nuevo Leon MH - Sweden PB - HVIDOVRE: SCRIPTOR PUBLISHER RP - NOT IN FILE U3 - TC 29 U4 - Ophthalmology U5 - J;Article AV - English IS - 1395-3907 UR - ISI:000086329900011 L2 - refractive errors;myopia;prevalence;children myopisation;POPULATION; CHILDREN SO - Acta Ophthalmologica Scandinavica 2000 ;78(2):177-181 2087 UI - 15228 AU - Villaseca JM AU - Navarro-Garcia F AU - Mendoza-Hernandez G AU - Nataro JP AU - Cravioto A AU - Eslava C AD - Natl Autonomous Univ Mexico, Fac Med, Dept Publ Hlth, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Med, Dept Biochem, Mexico City 04510, DF, MexicoInst Politecn Nacl, CINVESTAV, DEPCEL, Mexico City 07000, DF, MexicoUniv Maryland, Sch Med, Dept Pediat, Ctr Vaccine Dev, Baltimore, MD 21201, USAEslava, C, Natl Autonomous Univ Mexico, Fac Med, Dept Publ Hlth, Ap Postal 70-443, Mexico City 04510, DF, Mexico TI - Pet toxin from enteroaggregative Escherichia coli produces cellular damage associated with fodrin disruption AB - Pet toxin is a serine protease from enteroaggregative Escherichia coli which has been described as causing enterotoxic and cytotoxic effects. In this paper we show that Pet produces spectrin and fodrin (nonerythroid spectrin) disruption. Using purified erythrocyte membranes treated with Pet toxin, we observed degradation of alpha- and beta-spectrin chains; this effect was dose and time dependent, and a 120-kDa protein fraction was observed as a breakdown product. Spectrin degradation and production of the 120-kDa subproduct were confirmed using specific antibodies against the alpha- and beta-spectrin chains. The same degradation effect was observed in alpha-fodrin from epithelial HEp-2 cells, both in purified cell membranes and in cultured cells which had been held in suspension for 36 h; these effects were confirmed using antifodrin rabbit antibodies. The spectrin and fodrin degradation caused by Pet is related to the Pet serine protease motif, Fluorescence and light microscopy of HEp-2 Pet-treated cells showed morphological alterations, which were associated with irregular distribution of fodrin in situ. Spectrin and fodrin degradation by Pet toxin were inhibited by anti-Pet antibodies and by phenylmethylsulfonyl fluoride. A site-directed Pet mutant, which had been shown to abolish the enterotoxic and cytotoxic effects of Pet, was unable to degrade spectrin in erythrocyte membranes or purified spectrin or fodrin in epithelial cell assays. This is a new system of cellular damage identified in bacterial toxins which includes the internalization of the protease, induction of some unknown intermediate signaling steps, and finally the fodrin degradation to destroy the cell MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 23 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000089395700062 L2 - ERYTHROCYTE-MEMBRANE PROTEINS; TRICHOMONAS-VAGINALIS; PERSISTENT DIARRHEA; IN-VITRO; CELLS; APOPTOSIS; ENTEROTOXIN; PROTEASES; SPECTRIN; GASTROENTERITIS SO - Infection and Immunity 2000 ;68(10):5920-5927 2088 UI - 16208 AU - Villegas JA AU - Mauk AG AU - Vazquez-Duhalt R AD - UNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv British Columbia, Dept Biochem & Mol Biol, Vancouver, BC V6T 1Z3, CanadaVazquez-Duhalt, R, UNAM, Inst Biotecnol, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - A cytochrome c variant resistant to heme degradation by hydrogen peroxide AB - Background: Cytochrome c has peroxidase-like activity and can catalyze the oxidation of a variety of organic substrates, including aromatic, organosulfur and lipid compounds. Like peroxidases, cytochrome c is inactivated by hydrogen peroxide. During this inactivation the heme prosthetic group is destroyed. Results: Variants of the iso-1-cytochrome c were constructed by site-directed mutagenesis and were found to be more stable in the presence of hydrogen peroxide than the wild type. No heme destruction was detected in a triple variant (Tyr67-->Phe/Asn52-->Ile/Cys102-->Thr) with the catalytic hydrogen peroxide concentration of 1 mM, even following the loss of catalytic activity, whereas both double variants Ty67-->Phe/Cys102-->Thr and Asn52-->Ile/Cys102-->Thr showed a greater rate of peroxide-induced heme destruction than observed with the wild-type protein. Conclusions: Heme destruction and catalytic inactivation are two independent processes. An internal water molecule (Wat166) is shown to be important in the heme destruction process. The absence of a protein radical in the resistant variant suggests that the protein radical is necessary in the heme destruction process, but presumably is not involved in the reactions leading up to the protein inactivation MH - Canada MH - Mexico|Morelos PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 1074-5521 UR - ISI:000086371000003 L2 - biocatalysis;cytochrome c;inactivation mechanism;peroxidase activity;stability;M-CHLOROPEROXYBENZOIC ACID; SITE-DIRECTED MUTAGENESIS; LIGNIN PEROXIDASE; COMPOUND-III; HORSERADISH-PEROXIDASE; PROTEIN RADICALS; OXIDATION; INACTIVATION; MYOGLOBIN; ISO-1-CYTOCHROME-C SO - Chemistry & Biology 2000 ;7(4):237-244 2089 UI - 15135 AU - Villella A AU - Bialostocky D AU - Lori E AU - Meyerson H AU - Hostoffer RW AD - Rainbow Babies & Childrens Hosp, Dept Pediat, Cleveland, OH 44106, USAHosp Infantil Mexico Federico Gomez, Mexico City, DF, MexicoUniv Hosp Cleveland, Dept Pathol, Cleveland, OH 44106, USAHostoffer, RW, 1611 S Green Rd, S Euclid, OH 44121, USA TI - Rubinstein-Taybi syndrome with humoral and cellular defects: a case report AB - The first association of Rubinstien-Taybi syndrome with immunodeficiency and the successful prevention of infection with intravenous IgG is reported in a 4 year old boy. This case suggests that immunodeficiency maybe a prominent feature of this syndrome and may predispose these patients to recurrent infections MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 5 U4 - Pediatrics U5 - J;Article AV - English IS - 0003-9888 UR - ISI:000089689100024 L2 - Rubinstein-Taybi syndrome;immunodeficiency SO - Archives of Disease in Childhood 2000 ;83(4):360-361 2090 UI - 16372 AU - Vincent MB AU - Clarke JT AU - Ballester GE AU - Harris WM AU - West RA AU - Trauger JT AU - Evans RW AU - Stapelfeldt KR AU - Crisp D AU - Burrows CJ AU - Gallagher JS AU - Griffiths RE AU - Hester JJ AU - Hoessel JG AU - Holtzman JA AU - Mould JR AU - Scowen PA AU - Watson AM AU - Westphal JA AD - Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109, USAUniv Wisconsin, Space Astron Lab, Madison, WI 53706, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USASpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Wisconsin, Dept Astron, Madison, WI 53706, USACarnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USANew Mexico State Univ, Dept Astron, Las Cruces, NM 88003, USAAustralian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston Creek, ACT 2611, AustraliaUNAM, Inst Astron, Morelia 58090, Michoacan, MexicoCALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USAVincent, MB, Univ Michigan, Dept Atmospher Ocean & Space Sci, Space Res Bldg,2455 Hayward, Ann Arbor, MI 48109 USA TI - Mapping Jupiter's latitudinal bands and great red spot using HST/WFPC2 far-ultraviolet imaging AB - Jupiter's low and mid-latitudes are examined using ultraviolet (UV) images obtained with the Hubble Space Telescope Wide Field and Planetary Camera 2 over the period of 1994-1997. Effective atmospheric pressures probed by the F160W, F218W, and F255W are estimated at 100, 1.65, and 370 mbar, respectively, at low latitudes. Far-ultraviolet images of Jupiter taken with the F160W filter reveal bright and dark latitudinal bands at low and mid-latitudes. These bands were found to be correlated with the zonal winds; the bright bands are at latitudes of subsidences, and the dark bands at upwellings. The sense of this correlation is opposite to that seen in visible images of Jupiter where the bright zones are located over upwellings, and dark belts over subsidences. The locations of the dark bands seen in the F160W images are consistent with enhanced concentrations of NH3 and/or aerosols in the upwellings near the tropopause. Anticyclonic ovals, like the Great Red Spot, are regions of upwellings, and also appear dark in the F160W images. Temporal variations were also observed in the contrast of the low-latitude bands. An increase in the contrast of the low-latitude bands appeared to coincide with a visible wavelength broadening of the North Equatorial Belt that occurred in early to mid-1996. Changes at mid-southern latitudes were observed in the aftermath of the SL-9 impacts in July 1994. (C) 2000 Academic Press MH - Australia MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0019-1035 UR - ISI:000085847800001 L2 - Jupiter;atmosphere;ultraviolet observations;HST;HUBBLE-SPACE-TELESCOPE; ABSOLUTE REFLECTIVITY; STRATOSPHERE; AURORA; SCATTERING; EQUATORIAL; PHOTOMETRY; FEATURES; SPECTRA; SATURN SO - Icarus 2000 ;143(2):189-204 2091 UI - 16373 AU - Vincent MB AU - Clarke JT AU - Ballester GE AU - Harris WM AU - West RA AU - Trauger JT AU - Evans RW AU - Stapelfeldt KR AU - Crisp D AU - Burrows CJ AU - Gallagher JS AU - Griffiths RE AU - Hester JJ AU - Hoessel JG AU - Holtzman JA AU - Mould JR AU - Scowen PA AU - Watson AM AU - Westphal JA AD - Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109, USAUniv Wisconsin, Space Astron Lab, Madison, WI 53706, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USASpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Wisconsin, Dept Astron, Madison, WI 53706, USACarnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USANew Mexico State Univ, Dept Astron, Las Cruces, NM 88003, USAAustralian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston Creek, ACT 2611, AustraliaArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAUNAM, Astron Inst, Morelia 58090, Michoacan, MexicoCALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USAVincent, MB, Univ Michigan, Dept Atmospher Ocean & Space Sci, Space Res Bldg,2455 Hayward, Ann Arbor, MI 48109 USA TI - Jupiter's polar regions in the ultraviolet as imaged by HST/WFPC2: Auroral-aligned features and zonal motions AB - Jupiter's polar regions are examined using ultraviolet (UV, 120-320 nm) images obtained with the Hubble Space Telescope Wide Field and Planetary Camera 2 over the period of 1994-1997, These images probe the stratospheric aerosols at pressures of a few tens of millibars. We discovered a UV-darkened segment in the polar shading just equatorward of the north polar hood that remained aligned with the southern-most portion of the north auroral oval. The darkened segment generally extended over 100 degrees-260 degrees System III longitude, and 39 degrees-53 degrees N planetocentric latitude in the F160W, F218W, and F255W images. No single type of feature in the F218W and F255W images appeared consistently aligned within the outline of the north auroral oval, but several transient features were observed. It is not certain whether these transient features were associated with auroral processes, or just coincidentally aligned. A "south dark patch" was consistently observed within the outline of the south auroral oval and was temporally variable in size and shape. By tracking selected features, we obtained the first direct measurements of the zonal motions in Jupiter's high-latitude stratosphere. Primarily retrograde motions were observed from 41 degrees N to 60 degrees N. Both prograde and retrograde motions appeared from 48 degrees S to 71 degrees S. We propose that the asymmetric appearance of the polar hoods (R. A. West 1979, Icarus 38, 12-33; R. Wagener and J. Caldwell 1988, Icarus 74, 141-152) is influenced, in part, by meridional mixing in the stratosphere. Enhanced meridional mixing would tend to be more effective at dispersing the polar aerosols to lower latitudes in the north than in the south. (C) 2000 Academic Press MH - Australia MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0019-1035 UR - ISI:000085847800002 L2 - Jupiter;atmosphere;atmosphere dynamics;ultraviolet observations;HST;STRATOSPHERIC AEROSOLS; COMET SHOEMAKER-LEVY-9; ATMOSPHERE; LATITUDE; PROBE; TEMPERATURE; ABUNDANCES; SATURN; IMPACT; SYSTEM SO - Icarus 2000 ;143(2):205-222 2092 UI - 15480 AU - Virgen-Calleros G AU - Olalde-Portugal V AU - Carling DE AD - Univ Alaska Fairbanks, Agr & Forestry Expt Stn, Palmer, AK 99645, USACINVESTAV U, Dept Biotecnol & Bioquim, Irapuato 36500, Gto, MexicoUniv Guadalajara, CUCBA, Dept Agr Prod, Zapopan 44100, Jalisco, MexicoCarling, DE, Univ Alaska Fairbanks, Agr & Forestry Expt Stn, 533 E Fireweed, Palmer, AK 99645 USA TI - Anastomosis groups of Rhizoctonia solani on potato in central Mexico and potential for biological and chemical control AB - Anastomosis group (AG) identity of Rhizoctonia solani isolates collected from potato plants growing near Leon, Guanajuato, in central Mexico was determined, In samples from 15 fields, we found AG-3 and AG-4 with a frequency of 73.5% and 26.5% respectively, AG-4 was found only during the flowering stage of plant growth, whereas AG-3 was present on plants at every stage of development, The efficacy against R. solani, in vitro and in situ, of certain biocontrol agents (Bacillus subtilis, Gliocladium virens) and fungicides (Pencycuron, Tolcoflos-methyl, Fluazinam, Azoxystrobin) was assessed, Certain Bacillus strains collected from the field inhibited in vitro growth of isolates of certain AGs. Only Pencycuron and Tolcoflos-methyl inhibited AG-3 100% in vitro, whereas in the field, Azoxystrobin and Pencycuron showed the highest efficacy against development of sclerotia on tubers MH - USA MH - Mexico|Guanajuato MH - Mexico|Jalisco PB - ORONO: POTATO ASSOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0003-0589 UR - ISI:000088771700002 L2 - PATHOGENICITY; VIRULENCE; DISEASE; PLANTS; FUNGI; AG-3 SO - American Journal of Potato Research 2000 ;77(4):219-224 2093 UI - 16027 AU - Viveros M AU - Dickey C AU - Cotropia JP AU - Gevorkian G AU - Larralde C AU - Broliden K AU - Levi M AU - Burgess A AU - Cao CH AU - Weiner DB AU - Agadjanyan MG AU - Ugen KE AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 70228, DF, MexicoUniv S Florida, Coll Med, Dept Med Microbiol & Immunol, Tampa, FL 33612, USABioClonet Inc, Philadelphia, PA 19147, USAUniv Penn, Sch Med, Dept Med, Philadelphia, PA 19104, USAKarolinska Inst, Swedish Inst Infect Dis Control, Dept Clin Virol, S-10521 Stockholm, SwedenUniv Penn, Sch Med, Dept Pathol & Lab Med, Philadelphia, PA 19104, USARussian Acad Med, Inst Viral Preparat, Moscow 109088, RussiaUgen, KE, Univ S Florida, Coll Med, Dept Microbiol & Immunol, MDC 10, Tampa, FL 33612 USA TI - Characterization of a novel human immunodeficiency virus type 1 neutralizable epitope within the immunodominant region of gp41 AB - Previously, we generated human monoclonal antibodies using peripheral blood mononuclear cells from an asymptomatic human immunodeficiency virus type 1 (HIV-1)-seropositive donor. One of these monoclonal antibodies (designated clone 3, CL3) recognized 10 amino acids (GCSGKLICTT) within the immunodominant region (cluster I) of the transmembrane envelope glycoprotein gp41 and neutralized infection of target cells with different laboratory isolates. Because the epitope recognized by CL3 has two cysteine residues that could potentially produce a disulfide loop in gp41, we analyzed binding of our monoclonal antibody to the cyclic and linear motif of the peptide sequence IWGCSGKLICTTAVP (residues 600-614). The CL3 antibody did not bind to the synthetic cyclic peptide but did recognize the linear form. Two polyclonal rabbit sera against both the linear and cyclic peptides were then generated. Both antisera bound to viral glycoproteins gp41 and gp160, but neither sera neutralized HIV-1 laboratory isolates. Using a set of alanine-substituted IWGCSGKLICTTAV peptides, we analyzed binding of polyclonal antisera and CL3. The profile of binding of polyclonal antisera to these peptides was different from that of CL3 to the same peptides. This suggests that CL3 recognized a unique neutralizable core epitope, which was not immunogenic in either the cyclic or the linear IWGCSGKLICTTAVP peptides used as immunogens in the rabbits. (C) 2000 Academic Press MH - USA MH - Mexico|Distrito Federal MH - Russia MH - Sweden PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 8 U4 - Virology U5 - J;Article AV - English IS - 0042-6822 UR - ISI:000086889900014 L2 - HUMAN MONOCLONAL-ANTIBODY; HIV-1 INFECTION INVITRO; T-CELL RESPONSES; ENVELOPE GLYCOPROTEIN; TRANSMEMBRANE PROTEIN; SIV INFECTION; GP120; LYMPHOCYTES; MACAQUES; VACCINE SO - Virology 2000 ;270(1):135-145 2094 UI - 12724 AU - Vizcaino A AU - Contreras J AU - Favela J AU - Prieto M AD - Univ Castilla La Mancha, Escuela Super Informat, E-13071 Ciudad Real, Spain. Univ Colima, Telemat Dept, Colima, Mexico TI - An adaptive, collaborative environment to develop good habits in programming AB - In this paper we discuss how computer supported collaborative learning (CSCL) can be deployed to develop new skills and habits in students at university level. These considerations led to the development of an adaptive environment to develop good programming habits. We start by describing the difficulties in teaching and learning programming and more concretely, in making students good programmers. Afterwards, we explain why group work is an adequate approach to learn programming. Next HabiPro, an environment that trains students in Programming is described. The principal features of this system are: It is adaptive: depending on the group features the environment proposes different pedagogic methodologies and different exercises. The tool promotes collaboration and interaction among the students. The pedagogic methodologies are based on reflection, observation, and relation. Finally, we present our conclusions and discuss future work MH - Mexico|Colima MH - Spain T3 - INTELLIGENT TUTORING SYSTEMSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle3HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBS90A AV - English IS - 0302-9743 UR - ISI:000171336100030 SO - 2000 ;():262-271 2095 UI - 16348 AU - Vlag P AU - va-Vaidivia L AU - de Boer CB AU - Gonzalez S AU - Urrutia-Fucugauchi J AD - Univ Minnesota, Inst Rock Magnetism, Dept Geol & Geophys, Shepherd Labs 291, Minneapolis, MN 55455, USAUNAM, Inst Geofis, Lab Paleomagnetismo, Mexico City 05420, DF, MexicoUniv Utrecht, Inst Aardwetenschappen, Pal Lab Ft Hoofddijk, Utrecht, NetherlandsLiverpool John Moores Univ, Sch Biol & Earth Sci, Liverpool L3 5UX, Merseyside, EnglandVlag, P, Univ Minnesota, Inst Rock Magnetism, Dept Geol & Geophys, Shepherd Labs 291, 100 Union St SE, Minneapolis, MN 55455 USA TI - A rock- and paleomagnetic study of a Holocene lava flow in Central Mexico AB - Magnetic measurements of the Tres Cruces lava flow (ca. 8500 years BP, Central Mexico) show the presence of two remanence carriers, a Ti-rich titanomagnetite with a Curie temperature between 350 and 400 degrees C and a Ti-poor magnetite with a Curie temperature close to 580 degrees C. Magnetic changes after heating indicate that the titanomagnetite exsolves into magnetite and ilmenite when the sample is heated to 580 degrees C. Paleointensity estimates with the Thellier and Thellier method [Thellier, E., Thellier, O., 1959, Sur l'intensite du champ magnetique terrestre dans le passe historique et geologique. Ann. Geophysique., 15, 285-376] were only successful up to temperatures of 350 to 400 degrees C. This temperature corresponds with the Curie temperature of the titanomagnetite, which is probably pseudo-single or multi-domain. Therefore, the paleointensities should be interpreted with caution. The magnetic composition changes after 580 degrees C heating may explain the large variations in previous paleointensity determinations for the Tres Cruces rocks [Gonzalez, S., Sherwood, G., Bohnel, H., Schnepp, E., 1997. Palaeosecular variation in Central Mexico over the last 30,000 years: the record from lavas. Geophys, J. Int., 130, 201-219] using the Shaw method [Shaw, J., 1974. A new method of determining the magnitude of the palaeomagnetic field: application to five historic lavas and five archaeological samples. Geophys, J. R, Astr. Soc., 39, 133-141]. (C) 2000 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - USA MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000085907600007 L2 - rock magnetism;paleointensities;Mexico;lavas;GEOMAGNETIC-FIELD; PALEOINTENSITIES; MAGNETIZATION; INTENSITY; MAGNITUDE; MAGNETITE; BASALTS; SAMPLES; CORES SO - Physics of the Earth and Planetary Interiors 2000 ;118(3-4):259-272 2096 UI - 16402 AU - Voitsekhovich VV AU - Ankudinov SN AU - Mantsvetov AA AU - Savolainen VE AU - Konoplev SV AU - Perespelov AV AU - Tsytsulin AK AU - Nikitin VV AU - Dolgov DG AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City, DF, MexicoSt Petersburg State Elect Engn Univ, St Petersburg, RussiaSci Res Inst TV, St Petersburg, RussiaZAO SKN, St Petersburg, RussiaVoitsekhovich, VV, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City, DF, Mexico TI - High-speed television measurement system for estimating wavefront distortions by the Hartmann method AB - The realization and operation of a CCD computer television system with a maximum frame frequency of 200 Hz for analyzing wavefronts by the Shack-Hartmann method is described. The optimal frame frequency and wavelength range for ensuring minimum errors in the estimation of the coordinates of spots in a Hartmann pattern are determined. (C) 2000 The Optical Society of America. [S1070-9762(00)02202-8] MH - Mexico|Distrito Federal MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 1070-9762 UR - ISI:000085767600022 SO - Journal of Optical Technology 2000 ;67(2):184-189 2097 UI - 15565 AU - Volovitz B AU - Duenas-Meza E AU - Chmielewska-Szewczyk DA AU - Kosa L AU - Astafieva NG AU - Villaran C AU - Pinacho-Daza C AU - Laurenzi M AU - Jasan J AU - Menten J AU - Leff JA AD - Schneider Childrens Hosp, IL-49202 Petah Tiqwa, IsraelFdn Santafe Bogota, Bogota, ColombiaMed Acad Warsaw, Dept Pediat Pneumonol Allerg Dis & Haematol, Warsaw, PolandPediat Inst Svabhegy, Budapest, HungarySaratov Med Univ, Dept Allergol, Saratov, RussiaClin Ricardo Palma, Lima, PeruHosp Gen, Ctr Med La Raza, IMSS, Mexico City, DF, MexicoMerck & Co Inc, Whitehouse Stn, NJ, USAVolovitz, B, Schneider Childrens Hosp, 14 Kaplan St, IL-49202 Petah Tiqwa, Israel TI - Comparison of oral montelukast and inhaled cromolyn with respect to preference, satisfaction, and adherence: A multicenter, randomized, open-label, crossover study in children with mild to moderate persistent asthma AB - Objective: The aim of this study was to compare parent and child preference, satisfaction, and adherence of oral montelukast, a leukotriene receptor antagonist, with those of inhaled cromolyn, Background: Parents are actively involved in the care of their young children with asthma, Parent and child preference and satisfaction are critical in maintaining adherence to asthma therapy and achieving optimal therapeutic outcomes, Methods: Children aged 6 to 11 years with mild to moderate persistent asthma entered a multicenter, randomized, open-label, crossover trial, Children received montelukast tone 5-mg chewable tablet at bedtime) or cromolyn (2 mg 4 times daily via metered-dose inhaler), each for 4 weeks. A 2-week washout period separated the treatment periods. Parent and child preference for montelukast versus cromolyn and satisfaction with each treatment were assessed dth 1-question preference and multiquestion satisfaction questionnaires. Adherence with study medications and beta-agonist use was assessed by means of diary cards. Results: Two hundred sixty-six children entered the trial. Of 254 parents included in the analysis, 249 parents (98%) expressed a preference; of these, significantly more preferred oral montelukast over inhaled cromolyn (219 [88%] vs 30 [12%], P < 0.001). Similarly, significantly more children expressed a preference for montelukast over cromolyn (201 [80%] vs 50 [20%], P < 0.001), Parents and children both expressed significantly greater satisfaction with montelukast than with cromolyn across all questions in the questionnaires (P <0.001). Two hundred fourteen children (84%) were highly adherent (>95% of days) to montelukast therapy, whereas 122 children (48%) were adherent to cromolyn therapy (P < 0.001). Daily beta-agonist use was significantly lower during montelukast therapy than during cromolyn therapy (P = 0.001). Both therapies were generally well tolerated. Conclusions: Parent and child preference, satisfaction, and adherence were all significantly better with oral montelukast compared with inhaled cromolyn. Treatment with oral montelukast may improve the outcomes of asthma therapy in children MH - Colombia MH - Hungary MH - Israel MH - Mexico|Distrito Federal MH - Peru MH - Poland MH - Russia MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 8 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0011-393X UR - ISI:000088464000012 L2 - montelukast;asthma;children;compliance;leukotriene receptor antagonists;cromolyn;LEUKOTRIENE RECEPTOR ANTAGONIST; DOUBLE-BLIND TRIAL; 14-YEAR-OLD CHILDREN; CHILDHOOD ASTHMA; MEDICATION; THERAPY; BECLOMETHASONE; NONCOMPLIANCE; SEVERITY; RELEASE SO - Current Therapeutic Research-Clinical and Experimental 2000 ;61(7):490-506 2098 UI - 15688 AU - Vountesmeri V AU - Rodriguez J AD - Natl Autonomous Univ Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoNatl Tech Univ Ukraine, UA-252056 Kiev, UkraineVountesmeri, V, Natl Autonomous Univ Mexico, Ctr Instrumentos, CD Univ, Mexico City 04510, DF, Mexico TI - Magnetoresistive power sensor for measurement in situ of RF power absorbed by tissue AB - A new magnetoresistive sensor for use in medical RF heating and hyperthermia is presented. This sensor has de output proportional to RF power absorbed in tissue. The operating principle of the sensor consists of multiplication of the instantaneous value of the RF current and voltage in a microstrip transmission line using a magnetoresistive element. At an operating frequency of 915 MHz in a 20% bandwidth, it has a sensitivity of 22 mu V/W, insertion losses less than 0.1 dB and nonlinearity less than 3% up to 300 W, The uncertainty caused by the reflected waves with arbitrary phase is less than 3.5% up to the voltage standing wave ratio (VSWR) equals 3 MH - Mexico|Distrito Federal MH - Ukraine PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0018-9456 UR - ISI:000088174800009 L2 - magnetoresistive sensor;power measurement;RF hyperthermia;RF power;tissue;watt-converter;MICROWAVE SO - Ieee Transactions on Instrumentation and Measurement 2000 ;49(3):513-516 2099 UI - 15966 AU - Wacher C AU - Canas A AU - Barzana E AU - Lappe P AU - Ulloa M AU - Owens JD AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Biol, Dept Bot, Lab Micol, Mexico City 04510, DF, MexicoUniv Reading, Dept Food Sci & Technol, Reading RG6 6AP, Berks, EnglandWacher, C, Natl Autonomous Univ Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, Mexico TI - Microbiology of Indian and Mestizo pozol fermentations AB - Pozol is a beverage prepared from fermented nixtamal consumed in Southeastern Mexico. The Mestizos have modified the traditional Indian procedure by adding an extra cooking step to reduce the amount of solid sediment present in the beverage when the dough is suspended in water. To elucidate whether this additional step influences the microbiology of the fermentation the microbiota before fermentation of Indian and Mestizo nixtamal doughs, and the microbial growth during both processes were assessed. The initial microbiotas of freshly made nixtamal doughs purchased on nine successive days from one Indian producer and one Mestizo producer were examined. The numbers of microorganisms in the initial doughs were quite constant day by day and were similar in the Indian and Mestizo products, initial microbial concentrations (cfu g(-1)) were: lactic acid bacteria, 70(5)-10(6); non-lactic aerobic mesophilic bacteria, 10(4)-10(6), enterobacteria, 10(3)-10(4); mould propagules, 10(2)-10(3) and yeasts, 10(4). In the products fermented at 28 degrees C for 48 h the concentrations of lactic acid bacteria and non-lactic aerobic mesophilic bacteria were 10(9) and 10(5) cfu g(-1) respectively. No differences were found in the initial microbiotas nor in the fermentation patterns of both kinds of doughs. The concentrations of bacteria were similar on the surface and in the interior of the bails, but those of moulds and yeasts were higher on the surface than in the interior. In spite of the low pH values attained (4.5 or below), viable enterobacteria were still present at the end of the fermentation. (C) 2000 Academic Press MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0740-0020 UR - ISI:000087287000002 SO - Food Microbiology 2000 ;17(3):251-256 2100 UI - 15363 AU - Wadsworth WJ AU - Knight JC AU - Reeves WH AU - Russell PS AU - Arriaga J AD - Univ Bath, Dept Phys, Optoelect Grp, Bath BA2 7AY, Avon, EnglandUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoWadsworth, WJ, Univ Bath, Dept Phys, Optoelect Grp, Bath BA2 7AY, Avon, England TI - Yb3+-doped photonic crystal fibre laser AB - An ytterbium doped core has been incorporated into a photonic crystal fibre (PCF) with anomalous group velocity dispersion at all wavelengths longer than 730nm. Laser action is observed for the first time in such a fibre. This demonstration of lasing in PCF is a vital step towards realising the huge potential of PCF for fibre laser applications MH - United Kingdom MH - Mexico|Puebla PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 32 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000088996500010 L2 - FIBER; DISPERSION SO - Electronics Letters 2000 ;36(17):1452-1454 2101 UI - 16106 AU - Walter RC AU - Buffler RT AU - Bruggemann JH AU - Guillaume MMM AU - Berhe SM AU - Negassi B AU - Libsekal Y AU - Cheng H AU - Edwards RL AU - von Cosel R AU - Neraudeau D AU - Gagnon M AD - Ctr Invest Cient Educ Super Ensenada, Dept Geol, Ensenada, Baja California, MexicoUniv Texas, Inst Geophys, Austin, TX 78712, USAUniv Groningen, Dept Marine Biol, NL-9750 AA Haren, NetherlandsUniv Asmara, Dept Fisheries & Marine Biol, Asmara, EritreaWageningen Univ Agr, Wageningen Inst Anim Sci, Expt Zool Grp, NL-6700 AH Wageningen, NetherlandsMuseum Natl Hist Nat, Lab Biol Invertebres Marins & Malacol, CNRS, ESA 8044, F-75005 Paris, FranceAfrican Minerals Inc, Asmara, EritreaMinist Energy & Mines, Dept Mines, Asmara, EritreaNatl Museum Eritrea, Asmara, EritreaUniv Asmara, Archaeol Unit, Asmara, EritreaUniv Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455, USAUniv Rennes 1, Geosci Rennes, Lab Paleontol, F-35042 Rennes, FranceUniv Toronto, Dept Anthropol, Toronto, ON M5S 3G3, CanadaWalter, RC, Ctr Invest Cient Educ Super Ensenada, Dept Geol, Km 107 Carr Tijuana Ensenada, Ensenada, Baja California, Mexico TI - Early human occupation of the Red Sea coast of Eritrea during the last interglacial AB - The geographical origin of modern humans is the subject of ongoing scientific debate. The 'multiregional evolution' hypothesis argues that modern humans evolved semi-independently in Europe, Asia and Africa between 100,000 and 40,000 years ago 1, whereas the 'out of Africa' hypothesis contends that modern humans evolved in Africa between 200 and 100 kyr ago, migrating to Eurasia at some later time(2). Direct palaeontological, archaeological and biological evidence is necessary to resolve this debate. Here we report the discovery of early Middle Stone Age artefacts in an emerged reef terrace on the Red Sea coast of Eritrea, which we date to the last interglacial (about 125 kyr ago) using U-Th mass spectrometry techniques on fossil corals. The geological setting of these artefacts shows that early humans occupied coastal areas and exploited near-shore marine food resources in East Africa by this time. Together with similar, tentatively dated discoveries from South Africa(3) this is the earliest well-dated evidence for human adaptation to a coastal marine environment, heralding an expansion in the range and complexity of human behaviour from one end of Africa to the other. This new, widespread adaptive strategy may, in part, signal the onset of modern human behaviour, which supports an African origin for modern humans by 125 kyr ago MH - Canada MH - Eritrea MH - France MH - Mexico|Baja California MH - Netherlands MH - USA PB - LONDON: MACMILLAN MAGAZINES LTD RP - NOT IN FILE U3 - TC 51 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000086901600051 L2 - DATED CORAL-REEFS; STRATIGRAPHY; SINAI SO - Nature 2000 ;405(6782):65-69 2102 UI - 15532 AU - Wang JA AU - Li CL AD - IPN, ESIQIE, Super Sch Chem Engn, Lab Catalysis & Mat, Mexico City 07738, DF, MexicoE China Univ Sci & Technol, Petr Proc Res Ctr, Shanghai 200237, Peoples R ChinaWang, JA, IPN, ESIQIE, Super Sch Chem Engn, Lab Catalysis & Mat, Mexico City 07738, DF, Mexico TI - SO2 adsorption and thermal stability and reducibility of sulfates formed on the magnesium-aluminate spinel sulfur-transfer catalyst AB - Magnesium-aluminate spinel used as a sulfur-transfer catalyst in the fluid catalytic cracking units for SOx emission control was prepared by the precipitation method. The crystalline structure, textural property, and surface dehydroxylation of the sample were characterized by thermogravimetry-derivative thermogravimetry (TG-DTG), differential thermal analysis (DTA), X-ray diffraction (XRD), liquid N-2 adsorption-desorption and infrared spectroscopy (IR) measurements. The behavior of SO2 adsorption and oxidation on the surface of catalyst was evaluated with IR from 50 degrees C to 600 degrees C. Particularly, the thermal stability and H-2-reducibility of the formed sulfite or sulfate during SO2 adsorption or oxidation were tested under various conditions. In the absence of oxygen in the feed mixture, weak physically adsorbed SO2 species and surface sulfite were identified. In the case of SO2 oxidative adsorption, both surface sulfate and bulk-like sulfate were formed. When the sulfated sample was reduced with hydrogen, the surface sulfite and sulfates were completely removed below 550 degrees C in vacuum. The bulk-like sulfate, however, showed a high ability to resist H-2-reduction, which indicates that the reducibility of bulk-like sulfate formed on magnesium-aluminate spinel must be enhanced when it is used as a sulfur-transfer catalyst. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000088701500013 L2 - magnesium-aluminate spinel;sulfur-transfer catalyst;SO2 emissions;oxidative adsorption;reducibility;thermal stability;FCC unit;OXIDATIVE ADSORPTION; DIOXIDE; OXIDES SO - Applied Surface Science 2000 ;161(3-4):406-416 2103 UI - 16641 AU - Wang RF AU - Podos SM AU - Serle JB AU - Mittag TW AU - Ventosa F AU - Becker B AD - NYU, Mt Sinai Sch Med, Dept Ophthalmol, New York, NY 10029, USAWashington Univ, Sch Med, Dept Ophthalmol & Visual Sci, St Louis, MO 63110, USAAlcon Labs Inc, Ft Worth, TX 76101, USAHosp Dr Luis Sanchez Bulens, Asociac Para Evitar Ceguera Mexico, IAP, San Lucas Coyoaan, MexicoPodos, SM, NYU, Mt Sinai Sch Med, Dept Ophthalmol, 1 Gustave L Levy Pl,Campus Box 1183, New York, NY 10029 USA TI - Effect of latanoprost or 8-iso prostaglandin E-2 alone and in combination on intraocular pressure in glaucomatous monkey eyes AB - Objective: To, evaluate the possible additivity of the effects: of latanoprost and 8-iso prostaglandin E-2 (8-iso PGE(2)) on intraocular pressure (IOP) in monkey eyes with laser-included glaucoma. Methods: The IOP was measured hourly for 6 hours beginning at 9:30 AM on day 1 (baseline day), days 6 and 7 (single-agent therapy), and days 13 and 14 (combination therapy with both agents). Following 1 day of baseline measurement. 4 monkeys with unilateral glaucoma received monotherapy twice daily with either 1 drop of 0.005% latanoprost. or 0.1% 8-iso PGE(2), 25 mu L at 9:30 AM and 3:30 PM from days 2 through 7. From days 8 through 14, both agents were applied twice daily 5 minutes apart. Results: The maximum reduction of IOP (mean +/- SEM) was 8.8 +/- 1.9 mm Hg (26%) (P<.05) with latanoprost alone and 6.5 +/- 1.0 mm Hg (21%) (P<.01) with 8-iso PGE(2) alone, 2 hours after the morning dosing on day 7. A further reduction of IOP of 4.0 +/- 0.6 mm Hg was produced when 8-iso PGE(2) was added to latanoprost and of 3.0 +/- 0.7 mm Hg was produced when latanoprost was added to 8-iso PGE(2) on day 13 before the morning dosing. Combination therapy with both agents caused maximum IOP reductions from baseline of 11.3 +/- 3.0 mm Hg (33%) (P<.05) (latanoprost with S-iso PGE(2) added) and of 9.8 +/- 1.3 mm Hg (31%) (P<.01) (8-iso PGE(2) with latanoprost added) on day 14. Conclusion: Latanoprost and 8-iso PGE(2) have an additive effect on IOP in glaucomatous monkey eyes. Clinical Relevance: At least 50% of patients are treated with more than 1 ocular hypotensive medication. Thus, the determination of the additive effects on IOP of glaucoma medications will help to define optimum treatment regimens MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 7 U4 - Ophthalmology U5 - J;Article AV - English IS - 0003-9950 UR - ISI:000084852900012 L2 - AQUEOUS-HUMOR DYNAMICS SO - Archives of Ophthalmology 2000 ;118(1):74-77 2104 UI - 15591 AU - Wang W AU - Soto H AU - Oldham ER AU - Buchanan ME AU - Homey B AU - Catron D AU - Jenkins N AU - Copeland NG AU - Gilbert DJ AU - Nguyen N AU - Abrams J AU - Kershenovich D AU - Smith K AU - McClanahan T AU - Vicari AP AU - Zlotnik A AD - DNAX Res Inst Mol & Cellular Biol Inc, Dept Immunobiol, Palo Alto, CA 94304, USASchering Plough Lab Immunol Res, F-69572 Dardilly, FranceNCI, Frederick Canc Res & Dev Ctr, Mammalian Genet Lab, Frederick, MD 21702, USAInst Nacl Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City 14000, DF, MexicoZlotnik, A, DNAX Res Inst Mol & Cellular Biol Inc, Dept Immunobiol, Palo Alto, CA 94304 USA TI - Identification of a novel chemokine (CCL28), which binds CCR10 (GPR2) AB - We report the identification and characterization of a novel CC chemokine designated CCL28 and its receptor CCR10, known previously as orphan G-protein-coupled receptor GPR2. Human and mouse CCL28 share 83% identity at the amino acid and 76% at the nucleic acid levels. We also identified the mouse homologues of CCL28 and of CCR10, which map to mouse chromosomes 13 and 11, respectively, CCL28 is expressed in a variety of human and mouse tissues, and it appears to be predominantly produced by epithelial cells. Both human and mouse CCL28 induce calcium mobilization in human and mouse CCL28 expressing transfectants. CCL28 desensitized the calcium mobilization induced in CCR10 transfectants by CCL27, indicating that these chemokines share this new chemokine receptor. In vitro, recombinant human CCL28 displays chemotactic activity for resting CD4 or CD8 T cells MH - USA MH - France MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 76 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000088363800077 L2 - CXC CHEMOKINE; PROTEIN; CELLS; LYMPHOCYTES; LYMPHOTACTIN; EXPRESSION; TECK SO - Journal of Biological Chemistry 2000 ;275(29):22313-22323 2105 UI - 15612 AU - Warburton PE AU - Dolled M AU - Mahmood R AU - Alonso A AU - Li SL AU - Naritomi K AU - Tohma T AU - Nagai T AU - Hasegawa T AU - Ohashi H AU - Govaerts LCP AU - Eussen BHJ AU - Van Hemel JO AU - Lozzio C AU - Schwartz S AU - Dowhanick-Morrissette JJ AU - Spinner NB AU - Rivera H AU - Crolla JA AU - Yu CY AU - Warburton D AD - CUNY Mt Sinai Sch Med, Dept Human Genet, New York, NY 10029, USAColumbia Univ, Dept Genet & Dev, New York, NY, USAUniv Ryukyus, Sch Med, Dept Med Genet, Okinawa, JapanUniv Ryukyus, Sch Med, Dept Pediat, Okinawa, JapanDokkyo Univ, Sch Med, Koshigaya Hosp, Dept Pediat, Mibu, Tochigi, JapanKeio Univ, Sch Med, Dept Pediat, Tokyo, JapanErasmus Univ, Hosp Dijkzigt, Dept Clin Genet, NL-3015 GD Rotterdam, NetherlandsUniv Tennessee, Med Ctr, Dev Genet Ctr, Knoxville, TN, USAUniv Hosp Cleveland, Cleveland, OH 44106, USACase Western Reserve Univ, Ctr Human Genet, Dept Genet, Cleveland, OH 44106, USAChildrens Hosp Philadelphia, Div Human Genet & Mol Biol, Philadelphia, PA 19104, USAInst Mexicano Seguro Social, Div Genet, Guadalajara, Jalisco, MexicoSalisbury Dist Hosp, Wessex Reg Genet Lab, Salisbury, Wilts, EnglandWarburton, D, CUNY Mt Sinai Sch Med, Dept Human Genet, Box 1498, New York, NY 10029 USA TI - Molecular cytogenetic analysis of eight inversion duplications of human chromosome 13q that each contain a neocentromere AB - Neocentromeres are fully functional centromeres that have arisen in previously noncentromeric chromosomal locations on rearranged chromosomes, The formation of neocentromeres results in the mitotic stability of chromosomal fragments that do not contain endogenous centromeres and that would normally be lost, Here we describe a unique collection of eight independent patient-derived cell lines, each of which contains a neocentromere on a supernumerary inversion duplication of a portion of human chromosome 13q, Findings in these patients reveal insight into the clinical manifestations associated with polysomy for portions of chromosome 13q. The results of FISH and immunofluorescent analysis of the neocentromeres in these chromosomes confirm the lack of alpha-satellite DNA and the presence of CENtromere proteins (CENP)-C, -E, and hMAD2, The positions of the inversion break-points in these chromosomes have been placed onto the physical map of chromosome 13, by means of FISH mapping with cosmid probes. These cell lines define, within chromosome 13q, at least three distinct locations where neocentromeres have formed, with five independent neocentromeres in band 13q32, two in band 13q21, and one in band 13q31. The results of examination of the set of 40 neocentromere-containing chromosomes that have thus far been described, including the 8 neocentromere-containing chromosomes from chromosome 13q that are described in the present study, suggest that chromosome 13q has an increased propensity for neocentromere formation, relative to some other human chromosomes, These neocentromeres will provide the means for testing hypotheses about sequence requirements for human centromere formation MH - United Kingdom MH - Japan MH - Mexico|Jalisco MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 61 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000088373800008 L2 - DETECTABLE ALPHA-SATELLITE; ACENTRIC MARKER CHROMOSOME; MAMMALIAN ARTIFICIAL CHROMOSOMES; INNER KINETOCHORE PLATE; CENP-A; FUNCTIONAL CENTROMERE; INVERTED DUPLICATION; Y-CHROMOSOME; DNA; IDENTIFICATION SO - American Journal of Human Genetics 2000 ;66(6):1794-1806 2106 UI - 15465 AU - Watine J AU - Borgstein J AD - Ctr Hosp Gen, Lab Biol Polyvalente, F-12027 Rodez 09, FranceNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoNatl Inst Resp Dis, Mexico City, DF, MexicoWatine, J, Ctr Hosp Gen, Lab Biol Polyvalente, F-12027 Rodez 09, France TI - Evidence-based illiteracy or illiterate evidence MH - France MH - Mexico|Distrito Federal PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 3 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0140-6736 UR - ISI:000088884100058 SO - Lancet 2000 ;356(9230):684-684 2107 UI - 14528 AU - Watson D AU - Smith N AU - Hanlon L AU - McBreen B AU - Quilligan F AU - Tashiro M AU - Metcalfe L AU - Doyle P AU - Terasranta H AU - Carraminana A AU - Guichard J AD - Univ Coll Dublin, Dept Expt Phys, Dublin 4, IrelandCork Inst Technol, Dept Appl Phys & Instrumentat, Cork, IrelandUniv Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, JapanESA, Dept Space Sci, Div Astrophys, ISO Data Ctr, Madrid 28080, SpainNatl Univ Ireland Univ Coll Cork, Dept Phys, Cork, IrelandMetsahovi Radio Observ, Kylmala 02540, FinlandInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoWatson, D, Univ Coll Dublin, Dept Expt Phys, Dublin 4, Ireland TI - ASCA and other contemporaneous observations of the blazar B2 1308+326 AB - The high redshift (z = 0.997) blazar B2 1308+326 was observed contemporaneously at x-ray, optical and radio wavelengths in June 1996. The x-ray observations were performed with ASCA. The ASCA results were found to be consistent with reanalysed data from two earlier ROSAT observations. The combined ASCA and ROSAT data reveal an xray spectrum that is best fit by a broken power law with absorber model with photon spectral indices of Gamma (soft) = 3.4(-1.1)(+5.1) and Gamma (hard) = 1.63(-0.09)(+0.10) and a break energy at 1.1(-0.4)(+0.4) keV in the rest-frame of the blazar. The break in the x-ray spectrum is interpreted, from the shape of the simultaneous broadband spectral energy distribution, to be the emerging importance of inverse Compton (IC) emission which dominates the ASCA spectrum. The faint optical state reported for these observations (m(V) = 18.3 +/- 0.25) is incompatible with the high synchrotron flux previously detected by ROSAT. The TC emission detected by both ROSAT and ASCA was not significantly affected by the large change in the synchrotron component. Mg II emission was detected with an equivalent width (W-lambda) of similar to 15 Angstrom, significantly different from previously reported values. The small and variable W-lambda in B2 1308+326 may be due to the highly variable continuum and not intrinsically weak lines in the source. A lower limit on the Doppler boost factor calculated from the contemporaneous data is consistent with expectations for highly polarised quasars and higher than expected for BL Lacs. Absorption at a level of N-H = 3.0(-0.6)(+2.3) x 10(20) cm(-2) was detected which is in excess of the Galactic value of NH 1.1 x 10(20) cm(-2), indicating the possible presence of a foreground absorber. A gravitational microlensing scenario cannot therefore be ruled out for this blazar. No significant variability on timescales of hours was detected in the optical or x-ray data. B2 1308+326 could be a typical radio-selected BL Lac in terms of peak synchrotron frequency and optical and radio variability but its high bolometric luminosity, variable line emission and high Doppler boost factor make it appear more like a quasar than a BL Lac. It is suggested that B2 1308+326 be considered as the prototype of this class of composite source MH - Finland MH - Ireland MH - Japan MH - Mexico|Puebla MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000166412300016 L2 - galaxies : BL Lacertae objects : individual :;B2 1308+326;galaxies : quasars : individual : B2 1308+326;X-rays : galaxies;radio continuum : galaxies;cosmology : gravitational lensing;BL-LACERTAE OBJECTS; ACTIVE GALACTIC NUCLEI; SPECTRAL ENERGY-DISTRIBUTIONS; SPACE-TELESCOPE OBSERVATIONS; EXTRAGALACTIC RADIO-SOURCES; RAPID OPTICAL VARIABILITY; X-RAY; ROSAT OBSERVATIONS; LAC OBJECTS; MULTIWAVELENGTH OBSERVATIONS SO - Astronomy and Astrophysics 2000 ;364(1):43-52 2108 UI - 14808 AU - Watts CJ AU - Chehbouni A AU - Rodriguez JC AU - Kerr YH AU - Hartogensis O AU - De Bruin HAR AD - IRD, IMADES, Hermosillo 83190, Sonora, MexicoCESBIO, Toulouse, FranceWAU, Meteorol & Air Qual Grp, Wageningen, NetherlandsWatts, CJ, IRD, IMADES, Hermosillo 83190, Sonora, Mexico TI - Comparison of sensible heat flux estimates using AVHRR with scintillometer measurements over semi-arid grassland in northwest Mexico AB - The problems associated with the validation of satellite-derived estimates of the surface fluxes are discussed and the possibility of using the large aperture scintillometer is investigated. Simple models are described to derive surface temperature and sensible heat flux from the advanced very high resolution radiometer (AVHRR). Data were collected over an extensive site of semi-arid grassland in northwest Mexico during the summer of 1997 as part of the semi-arid land-surface-atmosphere (SALSA) program. Comparison of surface temperature derived from AVHRR with that derived from a ground-based infrared thermometer showed an RMSE of around 2 degreesC, while estimates of sensible heat Bur derived from AVHRR compared well with measurements using either eddy correlation or a large aperture scintillometer. (C) 2000 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000165510800007 L2 - sensible heat flux;surface temperature;satellite;AVHRR;scintillometer;SURFACE-ENERGY BALANCE; TEMPERATURES; LAYER SO - Agricultural and Forest Meteorology 2000 ;105(1-3):81-89 2109 UI - 15527 AU - Webb JR AU - Howard E AU - Benitez E AU - Balonek T AU - McGrath E AU - Shrader C AU - Robson I AU - Jenkins P AD - Florida Int Univ, Dept Phys, Miami, FL 33199, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoFlorida Int Univ, Dept Phys, Miami, FL 33199, USAColgate Univ, Dept Phys & Astron, Hamilton, NY 13346, USANASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771, USAUniv Space Res Assoc, Columbia, MD 21044, USAJoint Astron Ctr, Hilo, HI 96720, USANASA, Lyndon B Johnson Space Ctr, Houston, TX 77058, USAWebb, JR, Florida Int Univ, Dept Phys, Univ Pk, Miami, FL 33199, USA TI - The 1997 outburst of AO 0235+164: Evidence for a microlensing event? AB - We present: multiwavelength observations of AO 0235+164 made during a 5 mag outburst in 1997. Detection of the outburst at the observatory of the South Eastern Association for Research in Astronomy prompted a concerted effort by several observatories to monitor the source in the R band. We present V-, R-, and I-band photometry, as well as contemporaneous 850 mu m and X-ray measurements. We also use radio measurements from the University of Michigan's World Wide Web site in our analysis. We find that the source varies nearly simultaneously over 6 decades in frequency during this outburst and examine the possibility that the outburst was a result of a microlensing event. The duration of the outburst was on the order of 800 days, and the maximum luminosity was approximately 9.86 x 10(47) ergs s(-1) (assuming no relativistic beaming). We also analyze the long-term optical light curve and find that, although there is still no evidence for periodicity, the variations are interesting: the timescales between pairs of outbursts are remarkably similar. We suggest that the multifrequency behavior of the 1997 outburst is consistent with microlensing scenarios, while observations of previous outbursts suggest they were not consistent with gravitational microlensing MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000088585900003 L2 - galaxies : active;gravitational lensing;quasars : individual (AO 0235+164);BL; AO-0235+164; OBJECT; RADIO SO - Astronomical Journal 2000 ;120(1):41-46 2110 UI - 15396 AU - Weiler K AU - Walter MT AU - Brooks ES AU - Scott CA AD - Univ Alaska SE, Juneau, AK 99801, USACornell Univ, Dept Agr & Biol Engn, Ithaca, NY 14853, USAUniv Idaho, Dept Biol & Agr Engn, Moscow, ID 83843, USAInt Water Mgmt Inst, Texcoco, MexicoWeiler, K, Univ Alaska SE, Juneau, AK 99801, USA TI - Seasonal risk analysis for floodplains in the Delaware River Basin AB - Overland pollutant transport via surface runoff and flooding is a primary concern in the management of agricultural land resources in the Delaware River Basin. The Catskills is home to multiple water reservoirs that supply the drinking water for New York City. Contamination of this water by pollutants emanating from agricultural sources located in floodplain areas necessitates risk quantification for these locations. This study was performed to assess the risk of rivers topping their banks, or flooding, during various time periods of the year. Streamflow data for seven stations were analyzed to produce monthly partial duration and maximum series. A log-Pearson Type II analysis was performed on the maximum and partial duration series to produce monthly probabilities of flooding. Based on the maximum series,on average, March had the highest probability of Rood occurrence at 28%, and April and December had the next highest, at 18 and 12%, respectively. Larger flood probabilities were calculated using the partial duration series, and this result was attributed to the tendency of some months to have multiple floods. Calculated yearly flood probabilities from monthly results agreed well with theoretical values. This study has important ramifications for decision making based on hydrologic risk of pollutant transport in floodplain soils (e.g., this information is needed to determine surface water pollution risks from manure-spread agricultural fields and develop schedules to reduce this risk) MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Civil;Water Resources U5 - J;Article AV - English IS - 0733-9496 UR - ISI:000088913100008 L2 - FLOOD; HYDROLOGY; MODEL SO - Journal of Water Resources Planning and Management-Asce 2000 ;126(5):320-329 2111 UI - 15176 AU - Weiss O AU - Jimenez-Montano MA AU - Herzel H AD - Humboldt Univ, Inst Theoret Biol, D-10115 Berlin, GermanyUniv Amer Puebla St Catarina Martir, Puebla 7280, MexicoWeiss, O, Humboldt Univ, Inst Theoret Biol, Invalidenstr 43, D-10115 Berlin, Germany TI - Information content of protein sequences AB - The complexity of large sets of non-redundant protein sequences is measured. This is done by estimating the Shannon entropy as well as applying compression algorithms to estimate the algorithmic complexity. The estimators are also applied to randomly generated surrogates of the protein data. Our results show that proteins are fairly close to random sequences. The entropy reduction due to correlations is only about 1%. However, precise estimations of the entropy of the source are not possible due to finite sample effects. Compression algorithms also indicate that the redundancy is in the order of 1%. These results confirm the idea that protein sequences can be regarded as slightly edited random strings. We discuss secondary structure and low-complexity regions as causes of the redundancy observed. The findings are related to numerical and biochemical experiments with random polypeptides. (C) 2000 Academic Press MH - Germany MH - Mexico|Puebla PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 31 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000089480200006 L2 - AMINO-ACID-SEQUENCES; DNA-SEQUENCES; COMPRESSION ALGORITHMS; EVOLUTION; COMPLEXITY; PERIODICITIES; RECOGNITION; STATISTICS; REPEATS; ENTROPY SO - Journal of Theoretical Biology 2000 ;206(3):379-386 2112 UI - 15998 AU - Weissenmayer B AU - Geiger O AU - Benning C AD - Michigan State Univ, Dept Biochem, E Lansing, MI 48824, USATech Univ Berlin, Inst Biotechnol, D-13353 Berlin, GermanyUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoBenning, C, Michigan State Univ, Dept Biochem, E Lansing, MI 48824, USA TI - Disruption of a gene essential for sulfoquinovosyldiacylglycerol biosynthesis in Sinorhizobium meliloti has no detectable effect on root nodule symbiosis AB - The sulfolipid sulfoquinovosyldiacylglycerol is commonly found in the thylakoid membranes of photosynthetic bacteria and plants. While there is a good correlation between the occurrence of sulfolipid and photosynthesis, a number of exceptions are known. Most recently, sulfoquinovosyldiacylglycerol was discovered in the non-photosynthetic, root nodule-forming bacterium Sinorhizobium meliloti. This discovery raised the questions of the phylogenetic origin of genes essential for the biosynthesis of this lipid in S. meliloti and of a function of sulfolipid in root nodule symbiosis. To begin to answer these questions, we isolated and inactivated the sqdB gene of S, meliloti, This gene and two other genes located directly 3' of sqdB are highly similar to the sqdB, sqdC, and sqdD genes known to be essential for sulfolipid biosynthesis in the photosynthetic, purple bacterium Rhodobacter sphaeroides, This observation confirms the close phylogenetic kinship between these two species. Furthermore, the reduced similarity of sqdB to the plant ortholog SQD1 of Arabidopsis thaliana does not support a previous sqd gene transfer from the plant as a consequence of close symbiosis, A sulfolipid deficient mutant of S, meliloti disrupted in sqdB is capable of inducing functional nodules and does not show an obvious disadvantage under different laboratory culture conditions. Thus far, no specific function can be assigned to bacterial sulfolipid, in either nodule-associated or free-living cells, S, meliloti contains a rich set of polar membrane lipids some of which, including sulfolipid, may become critical only under growth conditions that still need to be discovered MH - Germany MH - Mexico|Morelos MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000087051200010 L2 - Rhizobium;SULFOLIPID-DEFICIENT MUTANT; RHODOBACTER-SPHAEROIDES; RHIZOBIUM-LEGUMINOSARUM; FAMILY RHIZOBIACEAE; UDP-SULFOQUINOVOSE; HOST STRAINS; SYM-PLASMID; DIACYLGLYCEROL; NODULATION; SQD1 SO - Molecular Plant-Microbe Interactions 2000 ;13(6):666-672 2113 UI - 15965 AU - Wheeler M AU - Guerrero-Plata A AU - Rico G AU - Torres-Guerrero H AD - Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoIMSS Siglo XXI, Hosp Pediat, Unidad Invest Inmunol, Mexico City 06720, DF, MexicoUSDA ARS, Cotton Pathol Res Unit, College Stn, TX 77845, USAWheeler, M, Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico TI - Biosynthesis and functions of melanin in Sporothrix schenckii AB - Sporothrix schenckii is a human pathogen that causes sporotrichosis, an important cutaneous mycosis with a worldwide distribution. It produces dark-brown conidia, which infect the host, We found that S. schenckii synthesizes melanin via the 1,8-dihydroxynaphthalene pentaketide pathway. Melanin biosynthesis in the wild type was inhibited by tricyclazole, and colonies of the fungus were reddish brawn instead of black on tricyclazole-amended medium. Two melanin-deficient mutant strains were analyzed in this study: an albino that produced normal-appearing melanin on scytalone-amended medium and a reddish brown mutant that accumulated and extruded melanin metabolites into its medium, Scytalone and flaviolin obtained from cultures of the reddish brown mutant mere identified by thin-layer chromatography, high-performance liquid chromatography, and UV spectra, Transmission electron microscopy showed an electron-dense granular material believed to be melanin in wild-type conidial cell malls, and this was absent in conidial walls of the albino mutant unless the albino was grown on a scytalone-amended medium. Melanized cells of wild-type S. schenckii and the albino grown on scytalone-amended medium mere less susceptible to killing by chemically generated oxygen- and nitrogen-derived radicals and by UV light than were conidia of the mutant strains. Melanized conidia of the wild type and the scytalone-treated albino mere also more resistant to phagocytosis and killing by human monocytes and murine macrophages than were unmelanized conidia of the two mutants. These results demonstrate that melanin protects S. schenckii against certain oxidative antimicrobial compounds and against attack by macrophages MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000087167900086 L2 - FUNGUS WANGIELLA-DERMATITIDIS; CONIDIAL PIGMENT BIOSYNTHESIS; CRYPTOCOCCUS-NEOFORMANS; ASPERGILLUS-FUMIGATUS; PENTAKETIDE METABOLITES; VERTICILLIUM-DAHLIAE; ANTIOXIDANT FUNCTION; PATHOGENIC FUNGI; VIRULENCE; IDENTIFICATION SO - Infection and Immunity 2000 ;68(6):3696-3703 2114 UI - 15332 AU - White L AU - Daly SA AU - McKenna CJ AU - Zhestkova N AU - Leal C AU - Breatnach F AU - Smelhaus V AU - Hung IJ AU - Kowalczyk J AU - Ninane J AU - Mitchell T AU - Haigh C AD - Glaxo Wellcome Res & Dev Ltd, Greenford UB6 0HE, Middx, EnglandSydney Childrens Hosp, Sydney, NSW, AustraliaRussian Childrens Republ Hosp, Moscow, RussiaNatl Inst Pediat, Cuicuilco, MexicoOur Ladys Hosp Sick Children, Dublin 12, IrelandFac Hosp Motol, Prague, Czech RepublicChang Gung Mem Hosp, Taipei 10591, TaiwanDept Pediat Hematol & Oncol, Lublin, PolandClin Univ St Luc, B-1200 Brussels, BelgiumDaly, SA, Glaxo Wellcome Res & Dev Ltd, Greenford Rd, Greenford UB6 0HE, Middx, England TI - A comparison of oral ondansetron syrup or intravenous ondansetron loading dose regimens given in combination with dexamethasone for the prevention of nausea and emesis in pediatric and adolescent patients receiving moderately/highly emetogenic chemotherapy AB - This double-blind, parallel-group, multicenter study compared the efficacy and safety of intravenous (IV) ondansetron with oral syrup ondansetron plus oral dexamethasone in the prevention of nausea and emesis in pediatric patients receiving moderately/highly emetogenic chemotherapy. On each day of chemotherapy, patients were administered ondansetron 5 mg/m(2) IV and placebo syrup orally (n = 215) or ondansetron 8 mg syrup orally and placebo IV (n = 223) plus dexamethasone 2-4 mg PO. Ondansetron 4 mg syrup PO was administered twice daily for 2 days following the cessation of chemotherapy. Complete or major control of emesis was obtained in 89% patients in the IV group and 88% patients in the oral syrup group during the worst day of chemotherapy treatment (90% CI: -6,4) and 85% and 82% patients, respectively, during the worst day of the study period (90% CI: -8,3). Intravenous or oral syrup ondansetron plus dexamethasone was well tolerated and effective in preventing chemotherapy-indicated emesis in pediatric patients MH - Australia MH - Belgium MH - Czech Republic MH - United Kingdom MH - Ireland MH - Mexico|Distrito Federal MH - Poland MH - Russia MH - Taiwan PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 11 U4 - Oncology;Hematology;Pediatrics U5 - J;Article AV - English IS - 0888-0018 UR - ISI:000089024700003 L2 - chemotherapy;nausea;ondansetron;oral syrup;vomiting;CISPLATIN-INDUCED EMESIS; CANCER-CHEMOTHERAPY; DOUBLE-BLIND; PLUS DEXAMETHASONE; CHILDREN; METOCLOPRAMIDE; CROSSOVER; PROCHLORPERAZINE; PROPHYLAXIS; NABILONE SO - Pediatric Hematology and Oncology 2000 ;17(6):445-455 2115 UI - 15912 AU - Whitmore RC AU - Whitmore RC AU - Whitmore MM AD - W Virginia Univ, Div Forestry, Morgantown, WV 26506, USAOasis Rio Baja, Mulege, Baja California, MexicoWhitmore, RC, W Virginia Univ, Div Forestry, POB 6125, Morgantown, WV 26506 USA TI - Distributional notes on the Mangrove Warbler (Dendroica petechia castaneiceps) near the northern edge of its range in eastern Baja California Sur, Mexico MH - USA MH - Mexico|Baja California PB - PROVO: BRIGHAM YOUNG UNIV RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1527-0904 UR - ISI:000087409200015 L2 - Mangrove Warbler;Dendroica petechia castaneiceps;Baja California Sur;mangrove;distribution SO - Western North American Naturalist 2000 ;60(2):228-229 2116 UI - 14700 AU - Widdowson MA AU - Cook AJC AU - Williams JJ AU - Argaes F AU - Rodriguez I AU - Dominguez JL AU - Rodriguez R AD - Univ London London Sch Hyg & Trop Med, London WC1E 7HT, EnglandUniv London Royal Vet Coll, Potters Bar, Herts, EnglandFMVZ UADY, Merida 97100, Yucatan, MexicoUniv Salford, Dept Biol Sci, Salford M5 4WT, Lancs, EnglandWiddowson, MA, Rijksinst Volkgezonheid Mileu RIVM, Antonie van Leeuwenhoeklaan 9,POB 1, NL-3720 BA Bilthoven, Netherlands TI - Investigation of risk factors for porcine Taenia solium cysticercosis: a multiple regression analysis of a cross-sectional study in the Yucatan Peninsula, Mexico AB - A cross-sectional survey for seropositivity to cysticercosis of pigs in the Yucatan Peninsula, Mexico, was carried out in 1996 together with a standardized questionnaire on predetermined individual pig and household risk factors for porcine infection. Serum samples from 697 pigs were analysed by immunoblot for antibodies to Taenia solium cysticercosis and questionnaires from 227 households in 18 villages were collected. All the data were analysed using multivariate analytical techniques taking household clustering into account. The overall porcine seroprevalence in the area was found to be 29%. The most important risk factors for seropositivity in pigs were presence versus absence of a toilet (adjusted odds ratio [adj. OR] 2.37, P = 0.005), crowded households (adj. OR 1.75, P = 0.034) and both corralling (adj. OR 2.14, P = 0.017) and letting pigs loose (adj. OR 2.32, P = 0.035) versus tying them up. There was evidence of clustering at household level and that possible risk factors at municipal or village level may also interact with higher risk management practices such as allowing pigs to run loose MH - United Kingdom MH - Mexico|Yucatan MH - Netherlands PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000165786300011 L2 - cysticercosis;Taenia solium;seroprevalence;antibodies;pigs;risk factors;questionnaires;household factors;Mexico;RURAL-COMMUNITY; MICHOACAN STATE; VILLAGE; EPIDEMIOLOGY SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2000 ;94(6):620-624 2117 UI - 16289 AU - Wiedenfeld H AU - ndrade-Cetto AA AU - Amador CP AD - Univ Bonn, Inst Pharmazeut, D-53121 Bonn, GermanyUniv Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Mexico City 04510, DF, MexicoWiedenfeld, H, Univ Bonn, Inst Pharmazeut, Immenburg 4, D-53121 Bonn, Germany TI - Flavonol glycosides from Equisetum myriochaetum MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0305-1978 UR - ISI:000086252300009 L2 - Equisetum myriochaetum;Equisetaceae;kaempferol-3-O-sophoroside;kaempferol-3,7-di-O-beta-D-glucoside;kaempferol-3-O-sophoroside-4 '-O-beta-D-glucoside caffeoyl-methylate-4-beta-D-glucoside;KAEMPFEROL GLYCOSIDES SO - Biochemical Systematics and Ecology 2000 ;28(4):395-397 2118 UI - 15121 AU - William C AU - Van Wyk JH AU - Mouton PLFN AU - Al-Johany AM AU - Lemos-Espinal JA AU - Paulissen MA AU - Flowers M AD - Indiana Univ Purdue Univ, Dept Biol, Ft Wayne, IN 46805, USAUniv Stellenbosch, Dept Zool, ZA-7600 Stellenbosch, South AfricaKing Saud Univ, Coll Sci, Dept Zool, Riyadh 11451, Saudi ArabiaEscuela Nacl Estudios Profes Iztacala, Ecol Lab, Unidad Biol Tecnol & Prototipos, Los Reyes Iztacala, MexicoMcNeese State Univ, Dept Biol & Environm Sci, Lake Charles, LA 70609, USAArizona State Univ, Dept Biol, Tempe, AZ 85287, USAWilliam, C, Indiana Univ Purdue Univ, Dept Biol, Ft Wayne, IN 46805, USA TI - Lizard antipredatory behaviors preventing extraction from crevices AB - We observed lizards in artificial crevices to examine behaviors that make them harder for predators to dislodge from crevices or burrows. We used four focal species and made additional observations of 13 cordyliform species. There were pronounced differences in defensive behaviors within crevices among species. Within crevices, representatives of several lizard taxa pressed some portions of their dorsal surfaces against crevice roofs, pushing upward with their legs, and used the tail to block access to their bodies. Two species of cordylids also tilted their heads down, bringing the lower jaw into contact with the floor and pressing the neck and posterodorsal head against the roof. Additionally, Uromastyx aegyptius and Sauromalus ater wedged themselves into crevices by inflating their bodies. We discuss interspecific differences in within-crevice defenses in relation to the unique defensive repertoires of each taxon MH - Mexico|Estado De Mexico MH - Saudi Arabia MH - South Africa MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000089615900012 L2 - antipredatory behavior;crevice;burrow;lacertilia;CNEMIDOPHORUS; TEXAS SO - Herpetologica 2000 ;56(3):394-401 2119 UI - 13836 AU - Williams-Linera G AU - Devall MS AU - varez-Aquino C AD - AC, Inst Ecol, Xalapa 91000, Veracruz, MexicoCtr Bottomland Hardwood Res, So Res Stn, Stoneville, MS 38776, USAWilliams-Linera, G, AC, Inst Ecol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - A relict population of Fagus grandifolia var. mexicana at the Acatlan Volcano, Mexico: structure, litterfall, phenology and dendroecology AB - Aim Fagus grandifolia var. mexicana (Martinez) Little has an extraordinarily restricted distribution in the Mexican montane cloud forests. Isolated Fagus (beech) populations have been recorded in less than 10 small areas (2-40 ha) in the eastern Sierra Madre at altitudes from 1400 to 2000 m. The objectives were to determine tree and seedling age, forest structure, phenology, litterfall patterns and the relationship between mast and climatic variables. Location We report on three Fagus stands at the Acatlan Volcano, Veracruz, Mexico. Methods Changes in forest cover were determined using aerial photographs. Within each stand, basal area, density and tree species composition were determined in a 0.1-ha band transect. Additionally, litterfall production was quantified and phenophases were recorded monthly over a 3-year period, and 60 tree cores were collected to determine age distribution and tree-ring growth. Results The forest was atypical in several respects. Fagus was the only dominant tree species in the crater stand, although in the rim and at the top of the volcano it was codominant with other tree species. Juveniles occurred only on the rim, but there was a seedling bank in the crater. Although forest cover in the area increased between 1968 and 1993, the Fagus stands did not change in size. Leaf production peaked in March and April, and leaf fail occurred from October through February. Litterfall production was the highest in November. During mast years, flowering started in February and between mast events there were no flowers or fruits. Minimum temperatures were highly correlated with Fagus litterfall and leaf fall. Seedlings ranged in age from 2 to 18 years and were 13-60 cm tall. Tree cores ranged from 76 to 120 years, but trees were older than the core samples. Main conclusions Although beech is considered a gap regeneration species that reaches the canopy after alternating periods of release and suppression, the trees in the crater were released when less than 1.5 m tall and have suffered few periods of suppression since. The results indicate that the crater stand was established after a severe disturbance destroyed the existing forest. We conclude that the relict beech population should be able to maintain itself, if not severely disturbed by humans or by climatic changes related to global warming MH - Mexico|Veracruz MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0305-0270 UR - ISI:000168256900004 L2 - beech;cloud forest;dendroecology;Fagus grandifolia;litterfall;Mexico;phenology;rare species;LOWER MONTANE FOREST; PHOSPHORUS FERTILIZATION; CANOPY GAPS; BEECH; GROWTH; TREES; CLIMATE; REPLACEMENT; TEMPERATE; NITROGEN SO - Journal of Biogeography 2000 ;27(6):1297-1309 2120 UI - 15973 AU - Wilner DJ AU - Ho PTP AU - Kastner JH AU - Rodriguez LF AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USARochester Inst Technol, Chester F Carlson Ctr Imaging Sci, Rochester, NY 14623, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoWilner, DJ, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - VLA imaging of the disk surrounding the nearby young star TW Hydrae AB - The TW Hydrae system is perhaps the closest analog to the early solar nebula. We have used the Very Large Array to image TW Hya at wavelengths of 7 mm and 3.6 cm with resolutions of 0." 1 (similar to 5 AU) and 1." 10 (similar to 50 AU), respectively. The 7 mm emission is extended and appears dominated by a dusty disk of radius greater than 50 AU surrounding the star. The 3.6 cm emission is unresolved and likely arises from an ionized wind or gyrosynchrotron activity. The dust spectrum and spatially resolved 7 mm images of the TW Hya disk are fitted by a simple model with temperature and surface density described by radial power laws, T(r) proportional to r(-0.5) and Sigma(r) proportional to r(-1). These properties are consistent with an irradiated gaseous accretion disk of mass similar to 0.03 M-circle dot with an accretion rate similar to 10(-8) M-circle dot yr(-1) and viscosity parameter alpha = 0.01. The estimates of mass and mass accretion rates are uncertain since the gas-to-dust ratio in the TW Hya disk may have evolved from the standard interstellar value MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 62 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000087183400025 L2 - accretion, accretion disks;circumstellar matter;radio continuum : stars;stars : formation;stars : individual (TW Hydrae);SPECTRAL ENERGY-DISTRIBUTIONS; TAURI STARS; STELLAR OBJECTS; CIRCUMSTELLAR DISKS; HL TAURI; X-RAY; ACCRETION; EVOLUTION; CONTINUUM; EMISSION SO - Astrophysical Journal 2000 ;534(1):L101-L104 2121 UI - 15525 AU - Winters JM AU - Keady JJ AU - Gauger A AU - Sada PV AD - Max Planck Inst Radioastron, D-53121 Bonn, GermanyTech Univ Berlin, Inst Astron & Astrophys, D-10623 Berlin, GermanyUniv Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USAFachhsch Fulda, D-36039 Fulda, GermanyUniv Monterrey, Dept Fis & Matemat, Garza Garcia 66238, NL, MexicoWinters, JM, Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany TI - Circumstellar dust shells around long-period variables VIII. CO infrared line profiles from dynamical models for C-stars AB - We present simplified non-LTE radiative transfer calculations for CO (v 0-1) fundamental and (v 0-2) overtone lines, using the structure of dynamical models for dust shells around carbon-rich long-period variables, which result from a consistent treatment of hydro- and thermodynamics, radiative transfer, chemistry and carbon grain formation. Owing to the saturation of the fundamental band absorption cores the most useful information is provided by the P-Cygni emission component, which can be used to constrain the dust optical depth in the 5 mu m region. The first overtone lines clearly reflect the shocked, layered structure of the inner shell region by showing a multi-component structure of the profiles. At least the lines of higher rotational excitation (J(l) > 10) are not saturated even for mass loss rates of the order of 10(-5) M.yr(-1) and thus can be used to constrain the mass loss rate. Furthermore, the dynamics of the dust formation process is reflected in the temporal evolution of the synthetic CO first overtone line profiles resulting from the models. The formation of a new dust layer in the inner shell region leads to a secondary (low velocity) absorption component which evolves on the time scale of a dust formation event, usually longer than the pulsation period of the star. The synthetic overtone line profiles calculated on the basis of one dust shell model resemble the time variations of corresponding lines in the observed high resolution CO line spectra of the carbon-Mira IRC +102161 which thereby are interpreted as result of a dust formation event taking place on a time scale of approximate to 10 yr corresponding to 6 pulsation periods of the star. However, the calculated fundamental line absorption cores are broader than observed and the first overtone line strengths are too high, indicating that the density and thus probably the mass loss rate of the model is too high by a factor of about 3 and should be closer to the value of 1 10(-5) M.yr(-1) given for IRC +10216 in the literature MH - Germany MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000088587000030 L2 - hydrodynamics;line : profiles;stars : circumstellar matter;stars : individual : IRC+10216;stars : AGB and post-AGB;stars : winds, outflows;GIANT BRANCH STARS; MASS-LOSS RATES; KAPPA-MECHANISM; MIRA VARIABLES; CARBON STARS; RICH STARS; IRC+10216; ENVELOPE; IRC; ATMOSPHERES SO - Astronomy and Astrophysics 2000 ;359(2):651-662 2122 UI - 15244 AU - Wolff M AU - Blas C AU - Cruz C AU - Gonzalez L AU - Boullosa C AU - Villamil V AU - Gomez A AU - Pauls D AU - Waldman DI AD - Yale Sch Med, Child Study Ctr, New Haven, CT, USAMexican Inst Psychiat, Ctr Ayuda Alcohol Familiares, Mexico City, DF, MexicoEmory Univ, Dept Psychol, Atlanta, GA 30322, USA TI - Association between DRD2 and personality and neuropsychological traits relevant to alcoholism MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000088565900234 SO - American Journal of Medical Genetics 2000 ;96(4):518-518 2123 UI - 15559 AU - Worret WI AU - Vocks E AU - Frias G AU - Burgdorf WHC AU - Lane P AD - Tech Univ Munich, Klin Dermatol & Allergol Biederstein, D-80802 Munich, GermanyGrp Med Churubusco SC, Mexico City, DF, MexicoUniv Saskatchewan, Saskatoon, SK S7N 0W0, CanadaWorret, WI, Tech Univ Munich, Klin Dermatol & Allergol Biederstein, Biedersteinerstr 29, D-80802 Munich, Germany TI - Actinic Prurigo. An update AB - Background and Objecitve. Actinic prurigo (AP) is a hereditary photodermatosis with typical symptoms and is quite common in North- and South-America. The key genetic factor appears to be a Native American background. In Europeans this type of AP is extremely ra re; some dispute if this disease exists in Caucasians. Some newer publications postulate that these patients share HLA markers with the Native Americans. The most important differential diagnosis for AP is polymorphic light eruption which can be excluded relatively accurately by the clinical picture,typical histology and HLA pattern. Patients/Methods. The case of a female patient of Mayan ancestry living in Germany is presented. Conclusions. Since in literature sometimes cases from Europe are diagnosed as AP this is a problem of naming the disease. It would be helpful to integrate the terms hereditary or hereditaria into the name of the disease in indians MH - Canada MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Dermatology U5 - J;Review AV - German IS - 0017-8470 UR - ISI:000088507300002 L2 - actinic prurigo;polymorphic light eruption;Indians;POLYMORPHIC LIGHT ERUPTION; INDIANS SO - Hautarzt 2000 ;51(7):474-478 2124 UI - 16385 AU - Wrackmeyer B AU - Garcia-Baez E AU - Zuno-Cruz FJ AU - Sanchez-Cabrera G AU - Rosales MJ AD - Univ Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoWrackmeyer, B, Univ Bayreuth, Anorgan Chem Lab, POB 101251, D-95440 Bayreuth, Germany TI - Bis(diphenylphosphanyl)amine and its disulfide and diselenide. Application of the INEPT-HEED pulse sequence for measurement of (1)J(P-31,N-15) and isotope induced chemical shifts 1 Delta N-14/15(P-31) at natural abundance of N-15 AB - Bis(diphenylphosphanyl)amine (1), the disulfide 1S and diselenide 1Se were selected to show the efficient application of the INEPT-HEED purse sequence for measuring coupling constants (1)J((PN)-P-31-N-15) and isotope induced chemical shifts (1)Delta(14/15)N(P-31), both at natural abundance of N-15, from P-31 NMR spectra. The sign of (1)J(P-31,15N) (> 0) in all three compounds was determined by selective heteronuclear H-1{P-31} double resonance experiments MH - Germany MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0932-0776 UR - ISI:000085779800009 L2 - amines;phosphorus;sulfide;selenide;NMR data;PHOSPHORUS-NITROGEN COMPOUNDS; P-N BOND; POLARIZATION TRANSFER; COUPLING-CONSTANTS; MAGNETIC-RESONANCE; P-31 NMR; SIGN DETERMINATION; C-13; SPECTROSCOPY; ENHANCEMENT SO - Zeitschrift fur Naturforschung Section B-A Journal of Chemical Sciences 2000 ;55(2):185-188 2125 UI - 16457 AU - Wu SM AU - Rios-Mercado RZ AU - Boyd EA AU - Scott LR AD - LIC Energy Inc, Houston, TX 77040, USAUniv Autonoma Nuevo Leon, Grad Program Syst Engn, San Nicolas De Los Garza 66450, Nuevo Leon, MexicoPROS Strateg Solut, Houston, TX 77006, USAUniv Chicago, Dept Comp Sci, Chicago, IL 60637, USAWu, SM, LIC Energy Inc, 13831 NW Freeway,Suite 235, Houston, TX 77040 USA TI - Model relaxations for the fuel cost minimization of steady-state gas pipeline networks AB - Natural gas, driven by pressure, is transported through pipeline network systems. As the gas flows through the network, energy and pressure are lost due to both friction between the gas arid the pipes' inner wail, and heat transfer between the gas and its environment. The lost energy of the gas is periodically restored at the compressor stations which are installed in the network. These compressor stations typically consume about 3-5% of the transported gas. This transportation cost is significant because the amount of gas being transported worldwide is huge. These facts make the problem of how to optimally operate the compressors driving the gas in a pipeline network important. In this paper, we address the problem of minimizing the fuel cost incurred by the compressor stations driving the gas in a transmission network under steady-state assumptions. In particular, the decision variables include pressure drops at each node of the network, mass flow rate at each pipeline leg, and the number of units operating within each compressor station. We present a mathematical model of this problem and an in-depth study of the underlying mathematical structure of the compressor stations. Then, based on this study, we propose two model relaxations tone in the compressor domain and another in the fuel cost function and derive a lower bounding scheme. We also present empirical evidence that shows the effectiveness of the lower bounding scheme. For the small problems, where we were able to find optimal solutions, the proposed lower bound yields a relative optimality gap of around 15-20%. For a larger, more complex instance, it was not possible to find optimal solutions but we were able to compute lower and upper bounds, finding a large relative gap between the two. We show this wide gap is mainly due to the presence of nonconvexity in the set of feasible solutions, since the proposed relaxations do a very good job of approximating the problem within each individual compressor station. We emphasize that this is. to the best of our. knowledge, the first time such a procedure (lower bound) has been proposed in over 30 years of research in the natural gas pipeline area. (C) 2000 Elsevier Science Ltd. All rights Reserved MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000085514700014 L2 - natural gas;pipelines;transmission networks;compressor stations;steady state;lower bounds;nonconvex objective SO - Mathematical and Computer Modelling 2000 ;31(2-3):197-220 2126 UI - 15258 AU - Xiao MF AU - Chen X AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Manchester, Inst Sci & Technol, Dept Phys, Manchester M60 1QD, Lancs, EnglandXiao, MF, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, POB 2681, Ensenada 22800, Baja California, Mexico TI - Shear-force, constant-height, and constant-intensity imaging in scanning near-field optical microscopy with s- and p-polarized incident light AB - We present a numerical comparison between shear-force, constant-height, and constant-intensity images in scanning near-field optical microscopy. We demonstrate the general difference between the three imaging modes. Two types of incident light are tested, with polarization perpendicular and parallel to the mean plane of the surface. Merits and demerits of the three images are discussed. (C) 2000 society of Photo-Optical Instrumentation Engineers. [S0091-3286(00)01509-9] MH - United Kingdom MH - Mexico|Baja California PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000089213800025 L2 - scanning near-field optical microscopy;near-field optics;SURFACE; DIPOLE; SPECTROSCOPY; DIFFRACTION; SCATTERING; RESOLUTION; RADIATION; IMAGES; LIMIT SO - Optical Engineering 2000 ;39(9):2495-2500 2127 UI - 15662 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Rigorous solution for transient propagation of electromagnetic waves through a medium: causality plus diffraction in time AB - A rigorous solution for transient propagation of electromagnetic waves through a medium has been found. Because of this rigorousness, the solution exhibits apparent consistency with Einsteinian causality. Thus, it is confirmed that faster-than-light or superluminal propagation of electromagnetic waves is not possible. Evanescent transmission gives rise to diffraction in time, which is the actual reason for deformation of group propagation. (C) 2000 Optical Society of America OCIS codes: 350.5500, 260.2110 MH - USA MH - Mexico|Baja California PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000088197400001 L2 - PHOTON TUNNELING TIME; TRAVERSAL TIME; BARRIER SO - Optics Letters 2000 ;25(14):995-997 2128 UI - 16199 AU - Xiao MF AU - Villagomez R AU - Alvarez L AD - Univ Nacl Autonoma Mexico, Ctr Ciencia Mat Condensada, Ensenada 22800, Baja California, MexicoCtr Invest Cientif Educ Super Ensenada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - On the infrared optical response of metallic thin films: a quantum size effect AB - We present a quantum mechanical calculation of the diamagnetic optical response of metallic ultrathin films. The study shows that in the optical response of ultrathin films (less than 100 Angstrom in thickness), there exists an oscillatory dependence on the film thickness, and the period of the oscillation corresponds to one or a few monolayers. We show that the oscillation can be attributed to the intraband fluctuations of the valence electrons in discrete energy stales. For comparison, we present experimental results on the infrared (lambda = 9.2 mu m) optical reflectance of Al ultrathin films of thickness 5-112 Angstrom, which exhibit experimentally the predicted oscillations MH - Mexico|Baja California MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000086415900009 L2 - POLARIZABILITY; REFLECTANCE; PARTICLES; WELL SO - Journal of Physics-Condensed Matter 2000 ;12(13):2925-2930 2129 UI - 16364 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Fis Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Reply - On the evanescent field of dipole MH - Mexico|Baja California MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000085874200020 SO - Journal of Modern Optics 2000 ;47(4):765-768 2130 UI - 16424 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Comment on "Physical picture for light emission in scanning tunneling microscopy" Xiao replies MH - Mexico|Baja California MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000085588400048 SO - Physical Review Letters 2000 ;84(9):2035-2035 2131 UI - 14802 AU - yala-Madrigal ML AU - Doerr S AU - Ramirez-Duenas ML AU - Hansmann I AD - Inst Humangenet, Halle, GermanyUniv Guadalajara, CIBO, IMSS, Guadalajara, Jalisco, Mexico TI - Mapping of KPNA1, KPNA4 and KPNB1 exclude these genes as candidates for Russell-Silver syndrome MH - Germany MH - Mexico|Jalisco PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000089400701442 SO - American Journal of Human Genetics 2000 ;67(4):263-263 2132 UI - 15088 AU - yala-Madrigal ML AU - Doerr S AU - Ramirez-Duenas ML AU - Hansmann I AD - Univ Halle Wittenberg, Inst Humangenet & Med Biol, D-06097 Halle, GermanyIMSS, Ctr Invest Biomed Occidente, Guadalajara, Jalisco, MexicoUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoHansmann, I, Univ Halle Wittenberg, Inst Humangenet & Med Biol, Magdeburgerstr 2, D-06097 Halle, Germany TI - Assignment of Karyopherin alpha 1 (KPNA1) to human chromosome band 3q21 by in situ hybridization MH - Germany MH - Mexico|Jalisco PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0301-0171 UR - ISI:000089812800008 L2 - HUMAN HOMOLOG; PROTEIN; INTERACTS; IMPORTIN; RCH1; TRANSPORT; CLONING; SRP1 SO - Cytogenetics and Cell Genetics 2000 ;90(1-2):58-59 2133 UI - 15412 AU - yala-Madrigal ML AU - Doerr S AU - Ramirez-Duenas ML AU - Hansmann I AD - Univ Halle Wittenberg, Inst Humangenet & Med Biol, D-06097 Halle, GermanyCtr Invest Biomed Occidente, IMSS, Guadalajara, Jalisco, MexicoUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoHansmann, I, Univ Halle Wittenberg, Inst Humangenet & Med Biol, Magdeburgerstr 2, D-06097 Halle, Germany TI - Assignment of KPNA4 and KBNB1 encoding karyopherin alpha 4 and beta 1 to human chromosome bands 11q22 and 17q21 respectively, by in situ hybridization MH - Germany MH - Mexico|Jalisco PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0301-0171 UR - ISI:000088901600034 L2 - PROTEIN SO - Cytogenetics and Cell Genetics 2000 ;89(3-4):258-259 2134 UI - 15119 AU - Yan AM AU - Wang ET AU - Kan FL AU - Tan ZY AU - Sui XH AU - Reinhold-Hurek B AU - Chen WX AD - China Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R ChinaInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoMax Planck Inst Terr Mikrobiol, Arbeitsgrp Symbioseforsch, D-35043 Marburg, GermanyChen, WX, China Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R China TI - Sinorhizobium meliloti associated with Medicago sativa and Melilotus spp. in arid saline soils in Xinjiang, China AB - Of 42 rhizobial isolates from Medicago sativa and Melilotus spp. growing in arid saline fields in Xinjiang, China, 40 were identified as Sinorhizobium meliloti by a polyphasic approach. However, diverse groups were obtained from these isolates in numerical taxonomy and SOS-PACE of proteins. They could grow at pH 10.5 and were tolerant to 2.5-4.0 % (w/v) NaCl MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000089717800023 L2 - Sinorhizobium meliloti;Medicago sativa;Melilotus spp.;diversity;phylogeny;ROOT NODULE BACTERIA; SP-NOV; NODULATING BACTERIA; RHIZOBIUM-GALEGAE; TIANSHANENSE; SYSTEMATICS; TAXONOMY; STRAINS SO - International Journal of Systematic and Evolutionary Microbiology 2000 ;50():1887-1891 2135 UI - 15515 AU - Yanez-Flores IG AU - Ibarra-Gomez R AU - Rodriguez-Fernandez OS AU - Gilbert M AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoLoughborough Univ Technol, Inst Polymer Technol & Mat Engn, Loughborough LE11 3TU, Leics, EnglandYanez-Flores, IG, Ctr Invest Quim Aplicada, Blvd Enrique Reyna H 140, Saltillo 25100, Coahuila, Mexico TI - Peroxide crosslinking of PVC foam formulations AB - Infrared and thermal analyses were used to evaluate the presence of residual unsaturation of a flexible foam formulation of PVC cross-linked by a peroxide/co-agent system. The crosslinking density of some samples was measured and compared with a sample crosslinked by triazine/MgO system in order to know more about the structure of the crosslinked network. Thermal stability of crosslinked samples was evaluated to compare both the crosslinking systems. Morphology of foamed and crosslinked samples was also investigated. Peroxide/TMPTMA appeared to be a reliable method of producing foamed and crosslinked plasticized PVC formulations: it allows the formation of a highly dense network, due to the trifunctional nature of the co-agent compared with the network formed with the triazine/MgO. The crosslinked samples by the peroxide/TMPTMA system did not show residual unsaturation after the optimum curing time. (C) 1000 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Coahuila PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000088602200022 L2 - PVC;foam;crosslinking;peroxide;FLEXIBLE PVC; POLYVINYL-CHLORIDE) SO - European Polymer Journal 2000 ;36(10):2235-2241 2136 UI - 14682 AU - Yanez-Limon JM AU - Perez-Robles JF AU - Gonzalez-Hernandez J AU - Vorobiev YV AU - Romano JA AU - Gandra FCG AU - da Silva EC AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Mexico City, DF, MexicoUniv Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilYanez-Limon, JM, IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Mexico City, DF, Mexico TI - Studies in sol-gel glasses with incorporation of Cu and Fe, using PAS, X-ray diffraction and EPR AB - SiO2 Glasses with incorporation of either Cu or Fe were prepared by the sol-gel process and annealed in air at temperatures within the range of 100 to 500 degreesC. The samples were characterized using Visible Photoacoustic Absorption Spectroscopy (PAS), X-ray powder diffraction and Electron Paramagnetic Resonance (EPR). Under the annealing both systems show significant changes in composition, producing an evolution in the optical absorption spectra. In both systems, the formation of the metal oxide particles is observed after annealing at or above 300 degreesC. The optical and EPR spectra are interpreted in terms of the coordination of the metal ions using the ligand field theory. It is observed that the color of the samples has strong change with both the type of metal incorporated and with the annealing temperature MH - Brazil MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0928-0707 UR - ISI:000165905100003 L2 - sol-gel glasses;metal doped glasses;colored glasses;photoacoustic spectroscopy;electron paramagnetic resonance;ELECTRON-PARAMAGNETIC-RESONANCE; SPIN-RESONANCE; IONS; IRON(III); PARTICLES; COPPER SO - Journal of Sol-Gel Science and Technology 2000 ;18(3):207-217 2137 UI - 15789 AU - yias-Montano JA AU - Floran B AU - Garcia M AU - Aceves J AU - Young JM AD - Ctr Invest, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoUniv Cambridge, Dept Pharmacol, Cambridge CB2 1QJ, England TI - Histamine inhibits depolarisation-induced dopamine-dependent relase of GABA in rat striatum via an action on H-3-receptors MH - United Kingdom MH - Mexico|Distrito Federal PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0007-1188 UR - ISI:000086846800066 SO - British Journal of Pharmacology 2000 ;129(): 2138 UI - 15356 AU - Yilmazer-Hanke DM AU - Hudson R AU - Distel H AD - Otto Von Guericke Univ, Inst Anat, D-39120 Magdeburg, GermanyUniv Munich, Inst Med Psychol, D-80336 Munich, GermanyNatl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoYilmazer-Hanke, DM, Otto Von Guericke Univ, Inst Anat, Haus 43,Leipziger Str 44, D-39120 Magdeburg, Germany TI - Morphology of developing olfactory axons in the olfactory bulb of the rabbit (Oryctolagus cuniculus): A golgi study AB - Transient expression of axon collaterals plays an important role in enabling neurons to find appropriate targets during development. In the olfactory bulb, the numbers of both sensory neurons and their targets, the glomeruli, increase markedly during the postnatal period. In the present study, the morphology of developing olfactory axons in the olfactory bulb of 1-21-day-old rabbits was analyzed using stereological methods and the rapid Golgi technique. The findings demonstrated a change in axon morphology from the olfactory nerve layer to the glomeruli suggestive of a sequence in axon development. In the olfactory nerve layer, axons typically had knob-like growth cones and a few collateral branches. Close to glomeruli, axons increased in thickness, formed rather complex and irregular growth cones, and typically gave off many collaterals. Within glomeruli, the axons formed terminal branches and boutons. Extraglomerular branches were apparently removed once axons had entered a glomerulus, insofar as these branches often displayed morphological signs of degeneration. In contrast, collateral branches ending ill the same glomerulus remained, indicating that formation of collaterals may assist olfactory axons in locating glomerular targets. (C) 2000 Wiley-Liss, Inc MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences;Zoology U5 - J;Article AV - English IS - 0021-9967 UR - ISI:000089056400005 L2 - development;olfactory axons;collaterals;growth cones;glomeruli;stereology;POSTNATAL-DEVELOPMENT; RAT; GLOMERULI; MOUSE; PROJECTIONS; NEURONS; GROWTH; EPITHELIUM; PATHWAY; SYSTEM SO - Journal of Comparative Neurology 2000 ;426(1):68-80 2139 UI - 14585 AU - yon-Beato E AU - Garcia A AU - Macias A AU - Perez-Sanchez JM AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUAM, Dept Fis, Mexico City 09340, DF, MexicoInt Ctr Theoret Phys, HEP, Diploma Programme, I-34100 Trieste, ItalyMacias, A, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Note on scalar fields non-minimally coupled to (2+1)-gravity AB - Scalar fields nonminimally coupled to (2 + 1)-gravity, in the presence of cosmological constant term, are considered. Nonminimal couplings are described by the term zeta R Psi (2) in the Lagrangian. Within a class of static circularly symmetric space-times, it is shown that the only existing physically relevant solutions are the anti-de Sitter space-time for zeta = 0, and the Martinez-Zanelli black hole for zeta = 1/8. We obtain also two new solutions with nontrivial scalar field, for zeta = 1/6 and zeta = 1/8, respectively, nevertheless, the corresponding space-times can be reduced, via coordinate transformations, to the standard anti-de Sitter space. (C) 2000 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000166098100021 L2 - BLACK-HOLE SO - Physics Letters B 2000 ;495(1-2):164-168 2140 UI - 15556 AU - Yu J AU - Giulietti K AU - Sourgen F AU - Wolf JP AU - Romo FC AU - Goutaudier C AU - Cohen-Adad MT AU - Boulon G AD - Univ Lyon 1, Spectrometrie Ion & Mol Lab, UMR 5579 CNRS, F-69622 Villeurbanne, FranceUniv Lyon 1, UMR 5620 CNRS, Lab Phys Chim Mat Luminescents, F-69622 Villeurbanne, FranceInst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 07738, DF, MexicoGiulietti, K, Univ Lyon 1, Spectrometrie Ion & Mol Lab, UMR 5579 CNRS, Blvd 11 Novembre 1918, F-69622 Villeurbanne, France TI - Second harmonic generation in a LiNbO3 crystal fiber AB - We have observed the second harmonic generation from a single crystal LiNbO3 fiber with a diameter of 63 mu m. Femtosecond laser pulses Corm a modelocked oscillator was focused perpendicularly onto the fiber. Scattered second harmonic was analyzed in polarization and the conversion efficiency was estimated. Comparing to a bulk nonlinear crystal, the striking feature of the SHG from the microcylinder is that the nonlinear conversion takes place out off phase-matching condition. For the fundamental at 850 nm the phase-mismatching is negative, even so, a relative important conversion efficiency of 3.7 x 10(-4) was obtained for incident 1.1-nJ and 150-fs pulses (peak intensity of 1.0 x 10(9) W/cm(2)). This conversion efficiency, independent to the phase matching, should not exhibit the sharp variation as for a bulk crystal when the incident fundamental is tuned across the phase-matched wavelength. The fiber provides then a wide bandwidth doubler. We applied this microdoubler in a second order autocorrelator MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1155-4339 UR - ISI:000088092600019 SO - Journal de Physique Iv 2000 ;10(P8):113-114 2141 UI - 15199 AU - Yuste F AU - Ortiz B AU - Carrasco A AU - Peralta M AU - Quintero L AU - Sanchez-Obregon R AU - Walls F AU - Ruano JLG AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBenemerita Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, MexicoUniv Autonoma Madrid, Dept Quim Organ C1, E-28049 Madrid, SpainYuste, F, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Cd Univ, Mexico City 04510, DF, Mexico TI - Synthesis of enantiomerically pure 2-amino alcohols from amino acids mediated by sulfoxides AB - Enantiomerically pure (R-1,S-2)- and (S-1,S-2)-2-amino alcohols can be easily synthesized by stereodivergent reduction of alpha'-(N-Boc)amino beta-keto sulfoxides (easily synthesized from readily available N-Boc amino eater hydrochlorides) with DIBAH (clr 82-92%) and DIBAH/ZnBr2 (de 80%), followed by hydrogenolysis of the C-S bond of the resulting hydroxy sulfoxides and final hydrolysis of the N-Boc protecting group. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000089397200008 L2 - HIGHLY DIASTEREOSELECTIVE HYDROCYANATION; ASYMMETRIC-SYNTHESIS; ENANTIOSELECTIVE SYNTHESIS; STEREOSELECTIVE REDUCTION; BETA-KETOSULFOXIDES; ORGANIC-SYNTHESIS; DERIVATIVES; EPOXIDES; REAGENTS; KETONES SO - Tetrahedron-Asymmetry 2000 ;11(15):3079-3090 2142 UI - 15057 AU - Yuste SB AU - Santos A AU - de Haro ML AD - Univ Extremadura, Dept Fis, E-06071 Badajoz, SpainUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoYuste, SB, Univ Extremadura, Dept Fis, E-06071 Badajoz, Spain TI - Demixing in binary mixtures of hard hyperspheres AB - The phase behavior of binary fluid mixtures of hard hyperspheres in four and five dimensions is investigated. Spinodal instability is found by using a recent and accurate I,rescription for the equation of state of the mixture that requires the equation of state of the single component fluid as input. The role played by the dimensionality on the possible metastability of the demixing transition with respect to a fluid-solid transition is discussed. The binodal curves in the pressure-chemical potential representation are seen to lie on a common line, independent of the size ratio MH - Mexico|Morelos MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000089938400006 L2 - DENSITY-FUNCTIONAL THEORY; SPHERE MIXTURES; PHASE-SEPARATION; CORE MIXTURES; EQUATION; FLUIDS; STATE; DIMENSIONS; BEHAVIOR; CUBES SO - Europhysics Letters 2000 ;52(2):158-164 2143 UI - 16225 AU - Yuste SB AU - Santos A AU - de Haro ML AD - Univ Extremadura, Dept Fis, E-06071 Badajoz, SpainUNAM, Ctr Invest Energia, Temixco 62580, Mor, MexicoSantos, A, Univ Extremadura, Dept Fis, E-06071 Badajoz, Spain TI - Direct correlation functions and bridge functions in additive hard-sphere mixtures AB - A method to obtain (approximate) analytical expressions for the radial distribution functions in a multicomponent mixture of additive hard spheres that was recently introduced is used to obtain the direct correlation functions and bridge functions in these systems. This method, which yields results practically equivalent to the generalized mean spherical approximation and includes thermodynamic consistency, is an alternative to the usual integral equation approaches and requires as input only the contact values of the radial distribution functions and the isothermal compressibility. Calculations of the bridge functions for a binary mixture using the Boublik-Mansoori-Carnahan-Starling-Leland equation of state are compared to parallel results obtained from the solution of the Percus-Yevick equation. We find that the conjecture recently proposed by Guzman and del Rio (1998, Molec. Phys., 95, 645), stating that the zeros of the bridge functions occur approximately at the same value of the shifted distance for all pairs of interactions, is at odds with our results. Moreover, in the case of disparate sizes, even the Percus-Yevick bridge functions do not have this property. It is also found that the bridge functions are not necessarily non-positive MH - Mexico|Morelos MH - Spain PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000086343400006 L2 - ORNSTEIN-ZERNIKE EQUATION; RADIAL-DISTRIBUTION FUNCTION; LENNARD-JONES FLUID; INTEGRAL-EQUATION; THERMODYNAMIC CONSISTENCY; CLASSICAL FLUIDS; PHASE-SEPARATION; YUKAWA CLOSURE; LIQUIDS; DENSITY SO - Molecular Physics 2000 ;98(7):439-446 2144 UI - 15571 AU - Zacs L AU - Schmidt MR AU - Schuster WJ AD - Ventspils Int Radio Astron Ctr, LV-1050 Riga, LatviaN Copernicus Astron Ctr, PL-87100 Torun, PolandUNAM, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoZacs, L, Ventspils Int Radio Astron Ctr, Akadeijas Iaukums 1, LV-1050 Riga, Latvia TI - A carbon rich star BD+75 degrees 348: a binary? AB - An LTE abundance analysis of the "CH-like" star ED +75 degrees 348, with an unknown evolutionary status, is presented based on high resolution, high signal-to-noise spectra. With [C/Fe] = +0.5 dex and a mean s-process overabundance of [s/Fe] similar or equal to +1.6dex the peculiar atmospheric composition of ED +75 degrees 348 is confirmed. The modest iron deficiency, [Fe/H] = -0.8, and the kinematic data support the idea that BD + 75 degrees 348 is an old disk population object. Possible evolutionary stages, that can explain its atmospheric parameters and peculiar chemical composition, are discussed MH - Latvia MH - Mexico|Baja California MH - Poland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000088424200027 L2 - stars : evolution;stars : abundances;stars : chemically peculiar;stars : individual : BD+75 degrees 348;INTERMEDIATE-MASS STARS; UVBY-BETA PHOTOMETRY; CHEMICAL-COMPOSITION; STELLAR EVOLUTION; ABUNDANCES; ELEMENTS; AGB SO - Astronomy & Astrophysics 2000 ;358(3):1022-1026 2145 UI - 15928 AU - Zadok D AU - Maskaleris G AU - Montes M AU - Shah S AU - Garcia V AU - Chayet A AD - Ctr Oftalmol Tijuana, Tijuana, Baja California, MexicoZadok, D, Assaf Harofeh Med Ctr, Dept Ophthalmol, IL-70300 Zerifin, Israel TI - Hyperopic laser in situ keratomileusis with the Nidek EC-5000 excimer laser AB - Objective: To evaluate the efficacy, safety, and predictability of hyperopic laser in situ keratomileusis (H-LASIK) using modified software, Design: Retrospective, noncomparative case series. Participants: The first 72 consecutive eyes of 44 patients with up to +5.00 diopters (D) hyperopia. Intervention: Hyperopic LASIK using the Automatic Corneal Shaper (ACS; Chiron Vision, Claremont, CA) and the Nidek EC-5000 excimer laser (Nidek, Tokyo, Japan). Main Outcome Measures: Uncorrected visual acuity, manifest spherical equivalent (MSE), best-corrected visual acuity (BCVA), and complications were studied. Results: At 6 months, in the low hyperopia group (<3.00 D), mean MSE was +0.30 +/- 0.71 D, with 88.9% eyes within 1 D of emmetropia compared with +1.09 +/- 0.92 D and 51.8% within 1 D of emmetropia in the moderate hyperopia group (greater than or equal to 3.00 D; P = 0.003). Uncorrected visual acuity was 20/40 or better in 43 of 45 eyes (95.6%) and in 21 of 27 (77.8%) eyes in the low and moderate hyperopia groups, respectively. Only one eye (1.4%) from the moderate hyperopia group lost two lines of BCVA, Eighteen eyes (25%) required retreatment to correct residual hyperopia, 9 eyes (20.0%) in the low hyperopia group and 9 eyes (33.3%) in the moderate hyperopia group. Retreatments resulted in an MSE of +0.02 +/- 0.45 D and +0.04 +/- 0.73 D in the low and moderate hyperopia groups, respectively. No flap-related complications were seen. Conclusions: Hyperopic LASIK with the ACS and the Nidek EC-5000 excimer laser using our modified software is a safe, effective, and predictable procedure for low hyperopia, Results are satisfactory up to moderate hyperopia. Significant regression can occur for low and moderate hyperopia, Retreatment can be performed safely and effectively to improve the visual and refractive results. Ophthalmology 2000;107:1132-1137 (C) 2000 by the American Academy of Ophthalmology MH - Israel MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 33 U4 - Ophthalmology U5 - J;Article AV - English IS - 0161-6420 UR - ISI:000087334000035 L2 - THERMAL KERATOPLASTY; PHOTOREFRACTIVE KERATECTOMY; NONCONTACT HOLMIUM; ASTIGMATISM SO - Ophthalmology 2000 ;107(6):1132-1137 2146 UI - 16051 AU - Zaldivar J AU - Martinez A AU - Ingram LO AD - Univ Florida, Inst Food & Agr Sci, Dept Microbiol & Cell Sci, Gainesville, FL 32611, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoIngram, LO, Univ Florida, Inst Food & Agr Sci, Dept Microbiol & Cell Sci, Gainesville, FL 32611 USA TI - Effect of alcohol compounds found in hemicellulose hydrolysate on the growth and fermentation of ethanologenic Escherichia coli AB - Lignocellulose can be readily hydrolyzed into a mixture of sugars using dilute mineral acids. During hydrolysis, a variety of inhibitors are also produced which include aromatic alcohols from lignin and furfuryl alcohol from pentose destruction. Seven compounds were investigated individually and in binary combinations (catechol, coniferyl alcohol, furfuryl alcohol, guaiacol, hydroquinone, methylcatechol, and vanillyl alcohol). Aromatic alcohols and furfuryl alcohol inhibited ethanol production from xylose in batch fermentations primarily by inhibiting the growth of Escherichia coli LY01, the biocatalyst. The toxicities of these compounds were directly related to their hydrophobicity. Methylcatechol was the most toxic compound tested (MIC = 1.5 g/L). In binary combination, the extent of growth inhibition was roughly additive for most compounds tested. However, combinations with furfuryl alcohol and furfural (furaldehyde) appear synergistic in toxicity. When compared individually, alcohol components which are formed during hemicellulose hydrolysis are less toxic for growth than the aldehydes and organic acids either on a weight basis or a molar basis. (C) 2000 John Wiley & Sons, Inc MH - USA MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 29 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000086928600006 L2 - ethanol;fermentation;lignin;catechol;furfuryl alcohol;guaiacol;vanillyl alcohol;lignocellulose;biomass;hemicellulose;Escherichia coli;xylose;SACCHAROMYCES-CEREVISIAE; AROMATIC MONOMERS; BATCH CULTURE; FUEL ETHANOL; BIOMASS; IDENTIFICATION; MICROORGANISMS; INHIBITORS; TOXICITY; BACTERIA SO - Biotechnology and Bioengineering 2000 ;68(5):524-530 2147 UI - 15445 AU - Zamora E AU - Diaz P AU - Jimenez-Sandoval S AU - Gonzalez-Rana C AU - Prutskij TA AU - Mishurnii V AU - Merkulov A AD - Univ Havana, Fac Phys, IMRE, Semicond Lab, Havana, CubaAutonomous Univ Queretaro, CINVESTAV, Mat Res Lab, Queretaro, MexicoBUAP, ICUAP, Ctr Res Semicond Devices, Puebla, Pue, MexicoAutonomous Univ San Luis Potosi, Inst Opt Commun, San Luis Potosi, MexicoIPN, CINVESTAV, Dept Elect Engn, SEES, Mexico City 07738, DF, MexicoZamora, E, Univ Havana, Fac Phys, IMRE, Semicond Lab, Havana, Cuba TI - Micro-Raman studies of AlxGa1-xP/GaP graded structures AB - We report applications of the micro-Raman technique to study the compositional dependence of phonon modes in graded AlxGa1-xP layers. The dependence of the phonon frequencies on the Al content was monitored in a single sample for two different crystallographic orientations. The measured compositional dependence of the LO and TO phonon frequencies are in good agreement with results of calculations based on the Modified Random Element Isodisplacement (MREI) model. The Raman spectra of the samples reveal also the existence of other features due to disorder MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Mexico|Queretaro MH - Mexico|San Luis Potosi PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000088768800023 SO - Physica Status Solidi B-Basic Research 2000 ;220(1):141-146 2148 UI - 15500 AU - Zapata-Torres M AU - Mascarenhas YP AU - Santana-Aranda MA AU - Luyo-Alvarado J AU - Melendez-Lira M AU - Zapata-Navarro A AU - Jimenez-Sandoval S AU - Castro-Rodriguez R AU - Pena JL AD - Univ Sao Paulo, Inst Fis Sao Carlos, BR-13060940 Sao Carlos, SP, BrazilInst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Altamira 89600, Tamaulipas, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, MexicoInst Politecn Nacl, Dept Fis Aplicada, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97310, Yuc, MexicoZapata-Torres, M, Univ Sao Paulo, Inst Fis Sao Carlos, Caixa Postal 369, BR-13060940 Sao Carlos, SP, Brazil TI - Structural and electronic properties of (CdTe)(1-x)(In2Te3)(x) films grown by close-spaced vapor transport combined with free evaporation AB - The structural and electronic properties of (CdTe)(1-x)(In2Te3)(x) thin films as a function of substrate temperature were studied using x-ray diffraction, energy dispersive x-ray analysis, and Raman, transmission, and modulated transmission spectroscopies. The films were grown by the close-spaced vapor transport technique combined with free evaporation; CdTe and In2Te3 were used as sources. From x-ray diffraction the presence of mixed phases and differences in composition were detected, and good correlation with Raman spectroscopy was found. Transmission spectroscopy suggested the possibility of a modulation of the band gap of the alloy from a value as low as 0.5 eV up to 1.5 eV, Single-phase films presented a direct band gap of around 1.15 eV, as obtained from modulated transmission measurements MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000088588800026 L2 - SEMICONDUCTORS; CRYSTALS; PHASE; INTE SO - Journal of Materials Research 2000 ;15(8):1811-1815 2149 UI - 15184 AU - Zaragoza IP AU - Martinez-Magadan JM AU - Santamaria R AU - Dixon D AU - Castro M AD - Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoPacific NW Natl Lab, WR Wiley EMSL, Richland, WA 99352, USANatl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoZaragoza, IP, Inst Mexicano Petr, Programa Simulac Mol, AP 15-805, Mexico City 07730, DF, Mexico TI - DFT study of the interaction of the HZSM-5 zeolite with the benzene molecule AB - We have performed density functional theory (DFT) calculations to describe the interaction of an active site of the HZSM-5 zeolite with a benzene molecule. We used a ring of ten SiO4 tetrahedral (10T) units to represent the structure of the HZSM-5 zeolite. The calculations were of the all-electron type, the exchange-correlation contributions were taken into account by means of the BLYP density functional, and orbital basis;sets of double numerical polarization quality were employed for all atoms. Starting from the silicalite 10T ring, with silicon atoms at each site, we found the most energetically favored site for the substitution of an aluminum atom by a silicon atom to produce an HZSM-5 ring model, with a Si/Al ratio of 9. In order to simulate the adsorbed state of benzene onto the zeolite, the geometry of the aromatic molecule was fully optimized in its interaction with the zeolite model, while keeping the ring frozen. The electronic structure of the benzene-HZSM-5 complex was then analyzed and discussed. Our results account for a significant interaction between the acid proton from the HZSM-5 cavity with benzene, shown by changes of the pi-bond cloud of benzene, which would lead to an active carbocationic moiety. (C) 2000 John Wiley & Sans, Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000089460100007 L2 - benzene;HZSM-5 zeolite;Bronsted acidity;density functional theory;DYNAMIC BEHAVIORS; ZSM-5 ZEOLITE; SUBSTITUTION; SIMULATION; PREDICTION; LOCATION; PORES SO - International Journal of Quantum Chemistry 2000 ;80(2):125-132 2150 UI - 15540 AU - Zavala-Castro JE AU - costa-Viana K AU - Guzman-Marin E AU - Rosado-Barrera ME AU - Rosales-Encina JL AD - IPN, Ctr Invest & Estudios Avanzados, Dept Patol Expt, Mexico City, DF, MexicoUniv Autonoma Yucatan, Ctr Invest Regionales Dr Hideyo Noguchi, Lab Biol Celular, Merida 97000, Yucatan, VenezuelaZavala-Castro, JE, IPN, Ctr Invest & Estudios Avanzados, Dept Patol Expt, Apartado Postal 14-740, Mexico City, DF, Mexico TI - Stage specific kinetoplast DNA-binding proteins in Trypanosoma cruzi AB - Knowledge regarding kinetoplast DNA organization in all members of the Trypanosomatid family is incomplete. Recently, the presence of kinetoplast-associated proteins in condensing kDNA networks in Crithidia fasciculata has been described and a role for these proteins in the maintenance of these complex structures was suggested. To investigate the presence of protein components in Trypanosoma cruzi kinetoplast, we previously described seven epimastigote kinetoplast-associated proteins. We report here the existence of kinetoplast binding proteins in amastigote and trypomastigote stages of T. cruzi, which could bind both mini and maxicircles components with a stage specific elements for every infective form of the parasite. We propose three major classes of kinetoplast-associated proteins related to the basic processes of this intricate disc structure and suggest a possible function of these binding proteins in the T. cruzi mitochondrial DNA organization. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000088621600007 L2 - Trypanosoma cruzi;kinetoplast DNA-binding proteins;mitochondrial DNA;DNA organization;PROTOZOAN CRITHIDIA-FASCICULATA; MITOCHONDRIAL GENE-EXPRESSION; MAMMALIAN-CELLS; MESSENGER-RNA; REPLICATION; BRUCEI; TOPOISOMERASE; PURIFICATION; POLYMERASE; SEQUENCE SO - Acta Tropica 2000 ;76(2):139-146 2151 UI - 14862 AU - Zavala-Paramo G AU - Chavez-Moctezuma MP AU - Garcia-Pineda E AU - Yin S AU - Chappell J AU - Lozoya-Gloria E AD - IPN, CINVESTAV, Genet Engn Dept, Unidad Irapuato, Guanajuato 36500, MexicoUniv Kentucky, Dept Agron, Plant Physiol Biochem Mol Biol Program, Lexington, KY 40546, USALozoya-Gloria, E, IPN, CINVESTAV, Genet Engn Dept, Unidad Irapuato, Km 9-6 Libramiento Norte Carretera Irapuato Leon,, Guanajuato 36500, Mexico TI - Isolation of an elicitor-stimulated 5-epi-aristolochene synthase gene (gPEAS1) from chili pepper (Capsicum annuum) AB - Phytoalexins play an important role in the inducible defense responses of plants against diseases caused by fungi. Some enzymes, involved in the respective biosynthetic pathways, catalyze key steps. Farnesyl pyrophosphate (FPP) is a key intermediate in the biosynthesis of terpenes. It may be converted into several cyclic and some acyclic sesquiterpenic derivatives, sterol precursors, or to geranylgeranyl pyrophosphate according to the requirements of the plant cells. Specific cyclization reactions of FPP are catalyzed by particular sesquiterpene cyclases. The 5-epi-aristolochene synthase (EAS) enzyme of tobacco (Nicotiana tabacum) and pepper (Capsicum annuum) produce the 5-epi-aristolochene, which is the immediate precursor of the bicyclic phytoalexin capsidiol. Oligonucleotides homologous to 3'-end specific regions of tobacco and Hyoscyamus muticus inducible sesquiterpene cyclase genes were used with the system for rapid amplification of cDNA ends (3'-RACE) technique to prepare pepper EAS-cDNA fragments (PEAS-cDNA). Three specific PEAS-cDNAs were isolated (PEAS1, PEAS18, and PEAS55), Northern blots of total RNA samples from pepper plant tissues challenged with cellulase or Phytophthora capsici showed different expression levels of the respective transcripts. PEAS1 was used to identify the corresponding elicitor-stimulated gene (gPEAS1). The nucleotide sequence of the proposed gPEAS1 promoter showed putative stimuli- and tissue-specific responsive elements. A pepper 5-epi-aristolochene synthase gene family of 5-8 members was demonstrated by Southern blot MH - Mexico|Guanajuato MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9317 UR - ISI:000165369900016 L2 - SESQUITERPENE CYCLASE GENE; CELL-SUSPENSION CULTURES; DNA-BINDING PROTEINS; PHYTOALEXIN CAPSIDIOL; BACTERIAL EXPRESSION; DIFFERENTIAL DISPLAY; PROMOTER; TOBACCO; ELEMENTS; CLONING SO - Physiologia Plantarum 2000 ;110(3):410-418 2152 UI - 15218 AU - Zavala-Velazquez JE AU - Ruiz-Sosa JA AU - Sanchez-Elias RA AU - Becerra-Carmona G AU - Walker DH AD - Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Dept Patol Trop, Fac Med, Merida, Yucatan, MexicoUniv Autonoma Yucatan, Dept Biol Celular, Merida, Yucatan, MexicoGen Hosp Ohoran, Merida, Yucatan, MexicoUniv Texas, Med Branch, Dept Pathol, Galveston, TX 77550, USAUniv Texas, Med Branch, WHO Collaborating Ctr Trop Dis, Galveston, TX 77550, USAZavala-Velazquez, JE, Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Dept Patol Trop, Fac Med, 498 Ave Itzaes, Merida, Yucatan, Mexico TI - Rickettsia felis rickettsiosis in Yucatan AB - Three patients with fever, exanthem, headache, and central-nervous-system involvement were diagnosed with Rickettsia felis infection by specific PCR of blood or skin and seroconversion to surrogate Rickettsia antigens. Although R fells's relationship to other Rickettsia species is known and the pathogenic potential of this clade is well documented, R felis's role as a pathogen has not been fully understood MH - Mexico|Yucatan MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 48 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000089430500016 L2 - FEVER GROUP RICKETTSIOSIS SO - Lancet 2000 ;356(9235):1079-1080 2153 UI - 15649 AU - zcona-Cruz MI AU - Rothenberg SJ AU - Schnaas L AU - Zamora-Munoz JS AU - Romero-Placeres M AD - Charles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Perinatol, Dept Dev Neurobiol, Mexico City, DF, MexicoNatl Inst Publ Hlth, Sch Publ Hlth, Cuernavaca, Morelos, MexicoNatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Res Math & Syst, Mexico City 04510, DF, MexicoNatl Inst Hyg Epidemiol & Microbiol, Havana, CubaRothenberg, SJ, Charles R Drew Univ Med & Sci, Dept Anesthesiol, MP 10,1621 E 120th St, Los Angeles, CA 90059 USA TI - Lead-glazed ceramic ware and blood lead levels of children in the City of Oaxaca, Mexico AB - Although Mexico substantially reduced use of leaded gasoline during the 1990s, lead-glazed pottery remains a significant source of population exposure. Most previous studies of lead in nonoccupationally exposed groups in Mexico have been conducted in the Mexico City metropolitan area. Oaxaca, a poor southern state of Mexico, has a centuries-old tradition of use of low temperature lead-glazed ceramic ware manufactured mainly by small family businesses. We measured blood lead levels in 220 8-10-y-old children (i.e., not from pottery-making families) who were students in the innercity of Oaxaca and in the mothers of all children. The geometric mean blood lead level of the children was 10.5 mu g/dl (+7.0/-4.3 mu g/dl standard deviation; range 1.3-35.5 mu g/dl). The corresponding mean value for the mothers was 13.4 (+9.0/-5.4 mu g/dl standard deviation; range = 2.8-45.3 mu g/dl). We used cutoffs that were greater than or equal to 10 mu g/dl, 20 mu g/dl, and 30 mu g/dl, and we determined that 54.9%, 10.3%, and 3.0% of the children were at or above the respective criteria. We accounted for 25.2% of the variance in blood lead levels of the children, using maternal responses to a questionnaire that assessed possible lead sources in a linear multiple-regression model. The most important factors related to lead levels were family use of lead-glazed pottery, use of animal fat in cooking, and family income. The addition of maternal blood lead level to the model increased accounted variance in blood lead to 48.0%. In logistic-regression modeling of children's blood lead levels, we used a cutoff of greater than or equal to 10 mu g/dl, and we found that use of lead-glazed pottery was the most important of all questionnaire items that were predictive of blood lead levels (odds ratio = 2.98). In Oaxaca, as is the case elsewhere in Mexico, lead-glazed ceramic ware remains a significant risk factor for elevated blood lead levels in children MH - USA MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 15 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000088231300009 L2 - RISK-FACTORS; EXPOSURE; AZARCON; GRETA SO - Archives of Environmental Health 2000 ;55(3):217-222 2154 UI - 14286 AU - Zenteno R AU - Vazquez L AU - Martinez-Cairo S AU - Bouquelet S AU - Agundis C AU - Zenteno E AD - Inst Nacl Enfermedades Resp, Dept Bioquim, Mexico City 01040, DF, MexicoUniv Autonoma Estado Morelos, CIQ, Lab Lectinas, Cuernavaca 62210, Morelos, MexicoIMSS, Ctr Med Nacl, Unidad Invest, Mexico City 10300, DF, MexicoUniv Sci & Technol Lille, CNRS, UMR 8576, Chim Biol Lab, F-59655 Villeneuve Dascq, FranceNatl Autonomous Univ Mexico, Fac Med, Dept Bioquim, Lab Inmunol, Mexico City 04510, DF, MexicoZenteno, R, Inst Nacl Enfermedades Resp, Dept Bioquim, Calzada Tlalpan 4502, Mexico City 01040, DF, Mexico TI - Identification of lectin isoforms in juvenile freshwater prawns Macrobrachium rosenbergii (DeMan, 1879) AB - From the serum of juvenile freshwater prawns, we isolated by affinity chromatography on glutaraldehyde-fixed rat erythrocytes stroma, immobilized in Sephadex G-25, a sialic acid specific lectin of 9.6 kDa per subunit. Comparative analysis against adult organisms purified lectin, by chromatofocusing, showed that the lectin from juvenile specimens is composed by four main isoforms with a pl of 4.2, 4.6, 5.1, and 5.6, whereas the lectin from adults is eluted at pH 4.2. The amino acid composition of the lectin obtained from adult and juvenile stages suggest identity, but the compositions are not identical since a higher content of carbohydrates was found in the lectin from younger organisms. The freshwater prawn lectin showed specificity toward N-acetylated amino sugar residues such as GlcNAc, GalNAc, Neu5Ac and Neu5,9Ac; but in juvenile organisms the lectin showed three times less hemagglutinating activity than the lectin from adults. Both lectins agglutinated rat, rabbit and chicken erythrocytes, indicating that Neu5,9Ac in specific O-glycosydically linked glycans seems to be relevant for the interaction of M. rosenbergii lectins with their specific cellular receptor. Our results suggest that the physicochemical characteristics of the lectin from the freshwater prawn are regulated through maturation MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0282-0080 UR - ISI:000167046000008 L2 - Macrobrachium rosenbergii;sialic acid specific lectin;crustacean lectin;SIALIC ACIDS; WATER PRAWN; HEMOLYMPH; CRUSTACEA; PURIFICATION; RECOGNITION; DECAPODA; IMMUNITY; PROTEIN SO - Glycoconjugate Journal 2000 ;17(5):339-347 2155 UI - 15278 AU - Zenteno R AU - Vazquez L AU - Sierra C AU - Pereyra A AU - Slomianny MC AU - Bouquelet S AU - Zenteno E AD - Inst Nacl Enfermedades Resp, Dept Bioquim, Mexico City 01040, DF, MexicoUniv Autonoma Estado Morelos, CIQ, Lab Lectinas, Cuernavaca 62210, Morelos, MexicoUniv Sci & Tech Lille Flandres Artois, Chim Biol Lab, UMR CNRS 8576, F-59655 Villeneuve Dascq, FranceUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Lab Inmunol, Mexico City 04510, DF, MexicoZenteno, R, Inst Nacl Enfermedades Resp, Dept Bioquim, Calzada Tlalpan 4502, Mexico City 01040, DF, Mexico TI - Chemical characterization of the lectin from the freshwater prawn Macrobrachium rosenbergii (De Man) by MALDI-TOF AB - The serum of the freshwater prawn contains a sialic acid specific lectin (MrL) that agglutinates erythrocytes from rat and rabbit, as well as some Gram negative and positive bacterial strains. In this work, we performed the chemical characterization of the MrL purified by affinity chromatography on stroma from rat erythrocytes and by ion exchange chromatography. In its active form, MRL is a dimeric glycoprotein with 9.5 kDa per subunit. The amino acid sequence of the lectin was deduced from peptides obtained after trypsin treatment by matrix-assisted laser desorption ionization mass spectrometry-time of flight analysis (MALDI-TOF). The predicted amino acid sequence of the lectin showed 54% homology with the hyperglycemic hormone from Macrobrachium rosenbergii. It also showed homology with the variable region of the human immunoglobulin kappa (22%) and lambda (27%) light chains. The lectin is a glycoprotein with 11% (w/w) carbohydrate content and is constituted by Gal, Man, GlcNAc, GalNAc and NeuAc in a molar ratio of 4:3:2:1:0.6. The primary structure of the carbohydrate chains of the lectin from the freshwater prawn was determined by affinity chromatography of MrL-glycopeptides on Con A and LCA lectin columns, which indicated that the main carbohydrate chains conforming the lectin are N-glycosidically linked. Man(3)GlcNAc(2.1) oligosaccharides were the most abundant structures with 57% followed by Gal(1.3)Man(3)GlcNAc(2.8) with 24%. Our results suggest that the freshwater prawn possess a lectin in the hemolymph plasma, related to those from the immunoglobulin superfamily. (C) 2000 Elsevier Science Inc. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 0305-0491 UR - ISI:000089335000012 L2 - sialic acid specific lectin;glycoprotein;MALDI-TOF;animal lectin;crustacean;Macrobrachium rosenbergii;hyperglycemic hormone;immunoglobulin superfamily proteins;VARIABLE REGION GENES; HORSESHOE-CRAB; HYPERGLYCEMIC HORMONE; INNATE IMMUNITY; ANIMAL LECTINS; PURIFICATION; SPECIFICITY; RECOGNITION; HEMOCYTES; HEMOLIN SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2000 ;127(2):243-250 2156 UI - 14475 AU - Zhang HQ AU - Li SP AD - Wuhan Univ Technol, Biomat & Engn Ctr, Wuhan 430070, Peoples R ChinaZhang, HQ, Technol Univ Mixteca, Design Inst, Huajuapan De Leon 69000, Oaxaca, Mexico TI - Morphology and formation mechanism of hydroxyapatite coating by hydrothermal method on CaO-SiO2-B2O3-Na2O glass AB - Hydrothermal method was used to prepare the hydroxyapatite (HA) coating on CaO-SiO2-B2O3-Na2O glass. The phase composition, morphology and microstructure of HA coated glass composites were analyzed using XRD, EPMA, FT-IR and SEM techniques. It revealed that HA coating possessed a porous gradient construction; HA coating was rightly bonded with the glass substrate by the interface layer. During the formation of HA coating, the hydrated silica produced by the corrosion of glass substrate in the hydrothermal solution provided favorable sites for apatite nucleation. With the dissolving of HA powder and the growth of apatite small crystallites, Ca2+,PO43- ions would precipitate on the surface of glass to form the HA coating. Silicon clement released from glass reacted with calcium produced by the dissolution of HA to form the tight reaction layer. HA coating is formed by the mechanism of dissolving-ions immigrating-precipitating pattern MH - Mexico|Oaxaca MH - Peoples R China PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0959-2989 UR - ISI:000166525300007 L2 - hydroxyapatite coating;hydrothermal coating method;porous gradient microstructure;CaO-SiO2 glass;formation mechanism;dissolubility of hydroxyapatite;CALCIUM HYDROXYAPATITE; DISSOLUTION; COMPOSITE; KINETICS; CONSTANT; CHELATE; GEL SO - Bio-Medical Materials and Engineering 2000 ;10(3-4):205-212 2157 UI - 14476 AU - Zhang HQ AU - Li SP AU - Yan YH AU - Wang YF AD - Wuhan Univ Technol, Biomat & Engn Ctr, Wuhan 430070, Peoples R ChinaZhang, HQ, Technol Univ Mixteca, Design Inst, Huajuapan De Leon 69000, Oaxaca, Mexico TI - Dissolution behavior of hydroxyapatite coating by hydrothermal method: An in vitro study AB - Hydroxyapatite (WA) coated CaO-SiO2-B2O3-Na2O glass composites prepared by a hydrothermal coating method were soaked in four kinds of solutions to evaluate the dissolution behavior and the chemical stability. 0.5 mol/l HCl and 0.5 mol/l HNO3 were used as acidic solution, and 5% physiological saline and sodium lactate compound solution as the neutral physiological solution. It was found that HA coated glass composites had the better chemical stability and the corroding-resistance ability. The dissolution behavior of the HA coating was mainly correlated with the phase composition of the as received HA coating and its microstructure as well as the pH value of the solution MH - Mexico|Oaxaca MH - Peoples R China PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0959-2989 UR - ISI:000166525300008 L2 - hydroxyapatite coating;hydrothermal method;dissolution behavior;chemical stability;acidic solution;simulated body fluid;PLASMA-SPRAYED COATINGS; IN-VITRO; TITANIUM; HYDROXYLAPATITE; COMPOSITES; CERAMICS SO - Bio-Medical Materials and Engineering 2000 ;10(3-4):213-219 2158 UI - 16573 AU - Zhu XS AU - Zamudio FZ AU - Possani LD AU - Valdivia HH AD - Univ Wisconsin, Madison, WI 53706, USAUNAM, Inst Biotecnol, Mexico City 04510, DF, Mexico TI - Purification and functional characterization of two peptide activators of ryanodine receptors from the scorpion B-judaicus MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000084779302482 SO - Biophysical Journal 2000 ;78(1):425A-425A 2159 UI - 15173 AU - Zhu YH AU - Lee WB AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoHong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Hong Kong, Peoples R ChinaZhu, YH, Univ Nacl Autonoma Mexico, Inst Invest Mat, Aportado Postal 70-360, Mexico City 04510, DF, Mexico TI - Tensile deformation and phase transformation of furnace-cooled Zn-Al based alloy AB - Phase transformation and microstructural changes of the furnace-cooled (FC) eutectoid Zn-Al based. alloy were studied during thermal ageing and tensile deformation using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Two types of decomposition of Zn-rich phases eta(FC)' and epsilon were detected in both the aged and the tensile deformed alloy specimens. Precipitates of alpha and T' phases were distinctly observed inside the light contrast eta(FC)' and E phases, respectively, using back-scattered electron imaging. Under tensile deformation at 150 degrees C, the coarse lamellar structure was deformed into fine particulate structure, whilst the fine lamellar structure remained unchanged. The mechanism of tensile fracture of the alloy is discussed in relation to the stress-induced phase transformation and microstructural change. An intrinsic co-relationship of phase transformation between the aged and tensile deformed alloy specimens is also discussed. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 18 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000089488800012 L2 - tensile deformation;fracture mechanism;phase transformation;scanning electron microscopy;Zn-Al based alloys SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2000 ;293(1-2):95-101 2160 UI - 15018 AU - Zhu YQ AU - Hsu WK AU - Terrones H AU - Grobert N AU - Chang BH AU - Terrones M AU - Wei BQ AU - Kroto HW AU - Walton DRM AU - Boothroyd CB AU - Kinloch I AU - Chen GZ AU - Windle AH AU - Fray DJ AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUNAM, Inst Fis, Queretaro 76000, MexicoTsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R ChinaUniv Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, EnglandWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Morphology, structure and growth of WS2 nanotubes AB - The morphological and structural features of WS2 nanotubes, generated from WOx (x congruent to 2.7) needles, by an in-situ heating process, have been studied by electron microscopy and X-ray diffraction (XRD), in conjunction with computer simulation. The results show that these inorganic fullerene nanotubes exhibit interesting differences when compared with carbon nanotubes (CNTs). In some cases the tube tips or segments are open. Occasionally the tube walls may be uneven. The sulfur distribution within the tubes is uniform, except for the edge layers which appear to contain less sulfur. Defects are often observed, particularly in the outer shells, which may be due to defective encapsulated WOx phases. Octagonal and square-like defects appear to be associated with the closure of tube caps. Electron diffraction (ED) reveals that nearly half of the non-helical WS2 nanotubes are of the armchair-type. A mechanism has been proposed to account for the extended inorganic nanotube growth MH - United Kingdom MH - Mexico|Queretaro MH - Peoples R China PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 39 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000090052000026 L2 - Tungsten sulfide;Nanotube;SCANNING PROBE MICROSCOPY; ALIGNED CARBON NANOTUBES; MOS2; MICROTUBES; FULLERENES; ARRAYS; BORON; FILMS; TIPS; TEM SO - Journal of Materials Chemistry 2000 ;10(11):2570-2577 2161 UI - 15895 AU - Zou LF AU - costa-Ortiz SE AU - Regalado LE AU - Zou LX AD - Ctr Invest Opt AC, Unidad Aguascalientes, Aguascalientes 20000, Ags, MexicoCtr Invest Opt AC, Leon 37000, Gto, MexicoZhongnan Univ National, Wuhan 430074, Hubei, Peoples R ChinaZou, LF, Ctr Invest Opt AC, Unidad Aguascalientes, Juan Montoro 207,Zona Ctr, Aguascalientes 20000, Ags, Mexico TI - Damage removal and defect control in As ion implanted Si1-xGex epilayers during a high-temperature annealing process AB - Damage removal and defect control in As ion implanted, both metastable pseudomorphic and partially relaxed Si1 - xGex epilayers, were studied by double-crystal X-ray diffractometry, and were compared to those in the nonimplanted Si1 - xGex epilayers. Samples were prepared by the implantation of 2 x 10(16) As+ cm(-2) and 100 keV with subsequent rapid thermal annealing at 950 and 1050 degrees C for 18 s. The results show that the annealing of ion implanted arsenic in Si1 - xGex epilayers during RTA leads to removal of irradiation damage and recovery of amorphous SiGe layers to the as-grown samples, but does not induce further structural defects. The strain relaxation mechanism of the As+ implanted Si1 - xGex epilayers is discussed and compared to that in the nonimplanted Si1 - xGex epilayers. (C) 2000 Elsevier Science B.V. All rights reserved MH - Mexico|Aguascalientes MH - Mexico|Guanajuato MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Optics;Physics, Applied U5 - J;Article AV - English IS - 0167-9317 UR - ISI:000087431500068 L2 - damage removal;defect control;Si1-xGex epilayers;ion implantation;rapid thermal annealing;PHYSICS SO - Microelectronic Engineering 2000 ;51-2():575-581 2162 UI - 15510 AU - Zozulya VV AU - Men'shikov VA AD - Yucatan Dev Ctr, Mexico City, DF, MexicoAviat Inst, Kharkov, UkraineZozulya, VV, Yucatan Dev Ctr, Mexico City, DF, Mexico TI - Solution of three-dimensional problems of the dynamic theory of elasticity for bodies with cracks using hypersingular integrals AB - Expressions are derived for the singular kernels of a system of integral equations that describe a three-dimensional dynamic problem for a cracked elastic body under harmonic loading. The order of singularity of the kernels of the integral equations is analyzed. Relations that allow reducing hypersingular surface integrals to ordinary contour ones are obtained. Test calculations are conducted MH - Mexico|Distrito Federal MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 13 U4 - Mechanics U5 - J;Article AV - English IS - 1063-7095 UR - ISI:000088598200006 SO - International Applied Mechanics 2000 ;36(1):74-81 2163 UI - 14778 AU - zpiroz-Leehan J AU - Lerallut JF AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Elect, Mexico City 09340, DF, MexicoUniv Technol Compiegne, UMR6600, Dept Genie Biol, F-60206 Compiegne, FranceAzpiroz-Leehan, J, Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Elect, Av Purisima & Michoacan S-N,Col Vicentina, Mexico City 09340, DF, Mexico TI - Selection of biorthogonal filters for image compression of MR images using wavelet packets AB - We present an analysis of different filter banks for the compression of magnetic resonance (MR) images of the human brain using wavelet packets based on biorthogonal filters. Initially, peak signal to noise ratio (PSNR) and normalized root mean square (RMS) error criteria are calculated for a series of images compressed with a 33:1 ratio, using filter banks based on biorthogonal wavelet packets. The results lead us to choose a few of these filter banks as optimal for image compression. One of these filters is employed to compress several images at four different compression ratios: 12.5:1, 25:1, 37.5:1 and 50:1. The quality of these images was evaluated by visual analysis by a group of seven experts who graded image quality on a 0-7 scale. Results show that using these filters, we can compress images to a rate of around 30:1 without introducing noticeable differences. Other applications for these filters are currently under study and include the compression/fusion of MR image stacks in order to obtain even better reductions in the amount of data needed to reconstruct complete MRI studies. (C) 2000 IPEM. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Biomedical U5 - J;Article AV - English IS - 1350-4533 UR - ISI:000165570000003 L2 - image compression;wavelet packets;magnetic resonance imaging;TRANSFORM SO - Medical Engineering & Physics 2000 ;22(5):335-343 2164 UI - 15002 AU - zucena-Coyotecatl H AU - Grigorieva NR AU - Kazennov BA AU - Madrigal-Melchor J AU - Novikov BV AU - Perez-Rodriguez F AU - Sel'kin AV AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72000, MexicoSt Petersburg State Univ, Inst Phys, St Petersburg 198904, RussiaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98060, Zac, MexicoUniv Autonoma Puebla, Inst Ciencias, Ctr Invest Dispositivos Semicond, Puebla 72570, MexicoRussian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaPerez-Rodriguez, F, Univ Autonoma Puebla, Inst Fis, Post J-48, Puebla 72570, Mexico TI - Optical spectroscopy of near-surface excitonic states AB - We have studied the low temperature excitonic reflectance and luminescence spectra of CdS1-xSex solid solutions with a near-surface excitonic potential well formed by excessive Se. The reflectance spectra were obtained at different angles of incidence for both s- and p-polarization components of light. New striking spectral features due to exciton confinement and quantization in the surface region were observed. For various samples, the generalized Morse surface potential was proved to be a good approximation in describing the experimental data. It is shown that the resonance excitonic luminescence is largely governed by the emission from excitations localized in the well. (C) 2000 Elsevier Science S.A. All rights reserved MH - Mexico|Puebla MH - Mexico|Zacatecas MH - Russia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000090045900050 L2 - optical properties;reflection spec.;luminescence;surface and interface states;SEMICONDUCTOR SO - Thin Solid Films 2000 ;373(1-2):227-230 2165 UI - 14665 AU - Zwick MS AU - Islam-Faridi MN AU - Zhang HB AU - Hodnett GL AU - Gomez MI AU - Kim JS AU - Price HJ AU - Stelly DM AD - Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843, USAInvestigen Inc, Alameda, CA 94501, USAColonia Rincon Primavera, Leon, MexicoPrice, HJ, Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843 USA TI - Distribution and sequence analysis of the centromere-associated repetitive element CEN38 of Sorghum bicolor (Poaceae) AB - Fluorescence in situ hybridization (FISH) of a large-insert genomic clone, BAC 27B2, previously suggested that Sorghum bicolor (2n = 20) has the tetraploid architecture A(b)A(b)B(b)B(b). Here, we report on BAC 22B2 subclone pCEN38 (1047-bp insert) as related to sorghum and sugarcane. Mitotic FISH of six different subclones of BAC 22B2 showed that pCEN38 produced the strongest specificity to the A(b) subgenome and signal occurred primarily near centromeres. Southern blots of pCEN38 to 21 crop plants revealed a narrow taxonomic distribution. Meiotic metaphase I FISH positioned pCEN38 sequences near active centromeres. Pachytene FISH revealed that the distributions are trimodal in several B-b and possibly all sorghum chromosomes. DNA sequencing revealed that the pCEN38 fragment contains three tandemly repeated dimers (<280 bp) of the same sequence family found in sorghum clone pSau3A10, and that each dimer consists of two divergent monomers (<140 bp). Sequence comparisons revealed homology between the pCEN38 monomers and the SCEN 140 bp tandem repeat family of sugarcane. FISH of pCEN38 yielded signal in centromere regions of most but not all sugarcane chromosomes. Results suggest that sugarcane and sorghum share at least one ancestor harboring elements similar to pCEN38 and SCEN and that each species had an ancestor in which the repetitive element was weakly present or lacking MH - Mexico|Guanajuato MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000165958000002 L2 - centromere;FISH;Poaceae;polyploidy;sorghum;sugarcane;tandem repeat;REPEATED DNA-SEQUENCE; ARABIDOPSIS-THALIANA; MAIZE; EVOLUTION; BRASSICA; GENOME; FAMILY; RICE; L. SO - American Journal of Botany 2000 ;87(12):1757-1764 2166 UI - 12109 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee SM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, CPPM, Grenoble, FranceLab Accelerateur Lineaire, IN2P3, CNRS, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Unit, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Ratio of isolated photon cross sections in p(p)over-bar collisions at root s=630 and 1800 GeV AB - The inclusive cross section for production of isolated photons has been measured in p (p) over bar collisions at roots = 630 GeV with the DO detector at the Fermilab Tevatron Collider. The photons span a transverse energy (E-T) range from 7-49 GeV and have pseudorapidity \eta\ < 2.5. This measurement is combined with the previous D0 result at s = 1800 GeV to form a ratio of the cross sections. Comparison of next-to-leading-order QCD with the measured cross section at 630 GeV and the ratio of cross sections show satisfactory agreement in most of the E-T range MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000172866200014 L2 - = 1.8 TEV SO - Physical Review Letters 2001 ;87(25): 2167 UI - 12234 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding D AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginter G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Ke Z AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM Inst NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for new physics using QUAERO: A general interface to D0 event data AB - We describe QUAERO, a method that (i) enables the automatic optimization of searches for physics beyond the standard model, and (ii) provides a mechanism for making high energy collider data generally available. We apply QUAERO to searches for standard model WW, ZZ, and t (t) over bar production, to searches for these objects produced through a new heavy resonance, and to the first direct search for W' --> WZ. Through this interface, we make three data sets collected by the D0 experiment at roots = 1.8 TeV publicly available MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000172545400011 L2 - COLLISIONS; COLLIDERS; JETS SO - Physical Review Letters 2001 ;8723(23): 2168 UI - 12522 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Ke Z AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, IN2P3, CNRS, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, IN2P3, CNRS, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for first-generation scalar and vector leptoquarks AB - We describe a search for the pair production of first-generation scalar and vector leptoquarks in the eejj and evjj channels by the DO Collaboration. The data are from the 1992-1996 p (p) over bar run at roots = 1.8 TeV at the Fermilab Tevatron collider. We find no evidence for leptoquark production: in addition. no kinematically interesting events are observed using relaxed selection criteria. The results from the eejj and evjj channels are combined with those from a previous DO analysis of the vvjj channel to obtain 95% confidence level (C.L.) upper limits on the leptoquark pair-production cross section as a function of mass and of beta. the branching fraction to a charged lepton. These limits are compared to next-to-leading-order theory to set 95% C.L. lower limits on the mass of a first-generation scalar leptoquark of 225, 204, and 79 GeV/c(2) for beta = 1. 1/2. and 0, respectively. For vector leptoquarks with gauge (Yang-Mills) couplings, 95% C.L. lower limits of 345. 337, and 206 GeV/c(2) are set on the mass for beta = 1, 1/2, and 0. respectively. Mass limits for vector leptoquarks are also set for anomalous vector couplings MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000171852100006 L2 - PRODUCTION CROSS-SECTION; LEPTON FLAVOR VIOLATION; TOP-QUARK MASS; PAIR PRODUCTION; P(P)OVER-BAR COLLISIONS; ROOT-S=1.8 TEV; HERA; DETECTOR; JETS; COLLABORATION SO - Physical Review D 2001 ;6409(9): 2169 UI - 12632 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Boos EE AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Ke Z AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Joint Inst Nucl Res, Dubna, RussiaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, CR-11636 Prague 1, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, Inst Sci Nucl, IN2P3, F-38041 Grenoble, FranceUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, F-75252 Paris 05, FranceUniv Paris 07, CNRS, IN2P3, F-75221 Paris 05, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, NL-1012 WX Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandUniv Buenos Aires, RA-1053 Buenos Aires, DF, ArgentinaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow 117234, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster LA1 4YW, EnglandUniv London Imperial Coll Sci Technol & Med, London SW7 2AZ, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Chicago, IL 60610, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for single top quark production at DO using neural networks AB - We present a search for electroweak production of single top quarks in approximate to 90 pb(-1) of data collected with the D(null set) detector at the Fermilab Tevatron collider. Using arrays of neural networks to separate signals from backgrounds, we set upper limits on the cross sections of 17 pb for the s-channel process p (p) over bar --> tb + X, and 22 pb for the t-channel process p (p) over bar --> tqb + X, both at the 95% confidence level. (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 31 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171479800007 L2 - Tevatron collider;top quark;neural networks;PRODUCTION CROSS-SECTION; GLOBAL QCD ANALYSIS; ALPHA-S CALCULATION; PARTON DISTRIBUTIONS; ORDER; COLLISIONS; DETECTOR; FERMILAB; PHYSICS SO - Physics Letters B 2001 ;517(3-4):282-294 2170 UI - 12633 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahl W AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Ke Z AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov V AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AD - Joint Inst Nucl Res, Dubna, RussiaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, CR-11636 Prague 1, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, Inst Sci Nucl, IN2P3, F-38041 Grenoble, FranceUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, F-75252 Paris 05, FranceUniv Paris 07, CNRS, IN2P3, F-75221 Paris 05, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul 151, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, NIKHEF H, NL-1012 WX Amsterdam, NetherlandsNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandUniv Buenos Aires, RA-1053 Buenos Aires, DF, ArgentinaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster LA1 4YW, EnglandUniv London Imperial Coll Sci Technol & Med, London SW7 2AZ, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the ratio of differential cross sections for W and Z boson production as a function of transverse momentum in p(p)over-bar collisions at root s=1.8 TeV AB - We report on a measurement of the ratio of the differential cross sections for IV and Z boson production as a function of transverse momentum in proton-anti proton collisions at roots = 1.8 TeV. This measurement uses data recorded by the DO detector at the Fermilab Tevatron in 1994-1995. It represents the first investigation of a proposal that ratios between IV and Z observables can be calculated reliably using perturbative QCD, even when the individual observables are not. Using the ratio of differential cross sections reduces both experimental and theoretical uncertainties, and can therefore provide smaller overall uncertainties in the measured mass and width of the IV boson than current methods used at hadron colliders. (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171479800009 SO - Physics Letters B 2001 ;517(3-4):299-308 2171 UI - 13101 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 6 & 7, LPNHE, CNRS, IN2P3, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for heavy particles decaying into electron-positron pairs in p(p)over-bar collisions AB - We present results of searches for technirho (rho (T)), techniomega (omega (T)), and Z' particles, using the decay channels rho (T), omega (T), Z' --> e(+)e(-). The search is based on 124.8 pb(-1) of data collected by the DO detector at the Fermilab Tevatron during 1992-1996. In the absence of a signal, we set 95% C.L. upper limits on the cross sections for the processes p (p) over bar --> rho (T), omega (T), Z' - e(+)e(-) as a function of the mass of the decaying particle. For certain model parameters, we exclude the existence of degenerate rho (T) and omega (T) states with masses below about 200 GeV. We exclude a Z' with mass below 670 GeV, assuming that it has the same couplings to fermions as the Z boson MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000170310200007 L2 - LOW-SCALE TECHNICOLOR; ASSISTED TECHNICOLOR; ROOT-S=1.8 TEV; GAUGE BOSONS SO - Physical Review Letters 2001 ;8706(6): 2172 UI - 13154 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AD - Joint Nucl Res Inst, Dubna 141980, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM Inst NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna 141980, Russia TI - Differential cross section for w boson production as a function of transverse momentum in p(p)over-bar collisions at root s=1.8 TeV AB - We report a measurement of the differential cross section for W boson production as a function of its transverse momentum in proton-antiproton collisions at roots = 1.8 TeV The data were collected by the DO experiment at the Fermilab Tevatron Collider during 1994-1995 and correspond to an integrated luminosity of 85 pb(-1). The results are in good agreement with quantum chromodynamics over the entire range of transverse momentum. (C) 2001 Elsevier Science B.V All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000170223600007 L2 - COLLABORATION; DISTRIBUTIONS; MASS SO - Physics Letters B 2001 ;513(3-4):292-300 2173 UI - 13353 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castila-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Orsay, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Orsay, FranceCEA, DAPNIA, Serv Phys Particles, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Phys Nucl, Krakow, PolandMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Quasi-model-independent search for new physics at large transverse momentum AB - We apply a quasi-model-independent strategy ("SLEUTH") to search for new high p(T) physics in approximate to 100 pb(-1) of p (p) over bar collisions at roots = 1.8 TeV collected by the D empty set experiment during 1992-1996 at thr Fermilab Tevatron. Over 32 e muX, W+jets-like, Z+jets-like, and (ll gamma)(ll gamma)(ll gamma )X exclusive final states are systematically analyzed for hints of physics beyond the standard model. Simultaneous sensitivity to a variety of models predicting new phenomena at the electroweak scale is demonstrated by testing the method on a particular signature in each set of final states. No evidence of new high p(T) physics is observed in the course of this search, and we find that 89% of an ensemble of hypothetical similar experimental runs would have produced a final state with a candidate signal more interesting than the most interesting observed in these data MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000169619300006 L2 - 2ND-GENERATION LEPTOQUARK PAIRS; DYNAMICAL SYMMETRY BREAKING; PRODUCTION CROSS-SECTION; ROOT-S=1.8 TEV; P(P)OVER-BAR COLLISIONS; (P)OVER-BAR-P COLLISIONS; QUARK COMPOSITENESS; HADRON COLLIDERS; ANOMALOUS WW; Z-BOSONS SO - Physical Review D 2001 ;6401(1): 2174 UI - 13155 AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Astur R AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fatyga MK AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Geld TL AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AD - Univ Oklahoma, Norman, OK 73019, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Oklahoma, Norman, OK 73019, USA TI - High-p(T) jets in p(p)over-bar collisions at root s=630 and 1800 GeV AB - Results are presented from analyses of jet data produced in p (p) over bar collisions at roots=630 and 1800 GeV collected with the D empty set detector during the 1994-1995 Fermilab Tevatron Collider run. We discuss the details of detector calibration, and jet selection criteria in measurements of various jet production cross sections at roots = 630 and 1800 GeV. The inclusive jet cross sections, the dijet mass spectrum, the dijet angular distributions, and the ratio of inclusive jet cross sections at roots = 630 and 1800 Gev are compared to next-to-leading-order QCD predictions. The order alpha (3)(s) calculations are in good agreement wit the data. We also use the data at roots = 1800 GeV to rule out models of quark compositeness with a contact interaction scale less than 2.2 TeV at the 95% confidence level MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000170265300003 L2 - DIJET ANGULAR-DISTRIBUTIONS; = 1.8 TEV; TOTAL CROSS-SECTION; GLOBAL QCD ANALYSIS; (P)OVER-BAR-P COLLISIONS; PARTON DISTRIBUTIONS; QUARK COMPOSITENESS; PARTICLE PHYSICS; ORDER ALPHA-S(3); HADRON COLLIDERS SO - Physical Review D 2001 ;6403(3): 2175 UI - 13753 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Choudhary BC AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Grreenlee H AU - Grinstein S AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras KJ AU - Manankov V AU - Mani S AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Mostafa M AU - da Motta L AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AD - NYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, CR-11142 Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FrancePanjab Univ, Chandigarh, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Phys Nucl, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAAbbott, B, NYU, New York, NY 10003, USA TI - Search for dilepton signatures from minimal low-energy supergravity in p(p)over-bar collisions at root s=1.8 Tev AB - We report on a search for supersymmetry using the D empty set detector. The 1994-1996 data sample of roots = 1.8 TeV p (p) over bar collisions was analyzed for events containing two leptons (e or mu), two or more jets, and missing transverse energy. Assuming the minimal supergravity model, with A(0) = 0 and mu < 0, various thresholds were employed to optimize the search. No events were found beyond expectation from the background. We set a lower limit at the 95% C.L. of 255 GeV/c(2) for equal mass squarks acid gluinos for tan = 2, and present exclusion contours in the (m(0),m(1/2)) plane for tan beta = 2-6 MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000168450800002 L2 - SUPERSYMMETRY; COLLABORATION; NEUTRALINOS; CHARGINOS; PHYSICS; MASS; LEP SO - Physical Review D 2001 ;6309(9): 2176 UI - 13817 AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Nunnemann T AU - Oesch L AU - Oguri V AD - Univ Oklahoma, Norman, OK 73019, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, IN2P3, CNRS, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Oklahoma, Norman, OK 73019, USA TI - Quasi-model-independent search for new high p(T) physics at D0 AB - We apply a quasi-model-independent strategy ("Sleuth") to search for new high p(T) physics in approximate to 100 pb(-1) of p (p) over bar collisions at roots = 1.8 TeV collected by the D0 experiment during 1992-1990 at the Familab Tevatron. We systematically analyze many exclusive final states and demonstrate sensitivity to a variety of models predicting new phenomena at the electroweak scale. No evidence of new high P-T physics is observed MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168338300005 L2 - 2ND-GENERATION LEPTOQUARK PAIRS; PRODUCTION CROSS-SECTION; ROOT-S=1.8 TEV; P(P)OVER-BAR COLLISIONS; (P)OVER-BAR-P COLLISIONS; QUARK COMPOSITENESS; TRANSVERSE-MOMENTUM; Z-BOSONS; LIMITS; JETS SO - Physical Review Letters 2001 ;86(17):3712-3717 2177 UI - 13977 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Measurement of the angular distribution of electrons from W -> e nu decays observed in p(p)over-bar collisions at root s=1.8 TeV AB - We present the first measurement of the electron angular distribution parameter alpha (2) in W-->e nu events produced in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the D empty set detector during the 1994-1995 Fermilab Tevatron run. We compare our results with next-to-leadiog order perturbative QCD, which predicts an angular distribution of (1 +/- alpha (1) cos theta* + alpha (2) cos(2) theta*), whew theta* is the polar angle of the electron in the Collins-Soper frame. In the presence of QCD corrections, the parameters alpha (1) and alpha (2) become functions of p(T)(W), the W boson transverse momentum. This measurement provides a test of next-to-leading order QCD corrections which are a non negligible contribution to the W boson mass measurement MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000167792200005 L2 - W-BOSON MASS; SMALL TRANSVERSE-MOMENTUM; HADRON-COLLISIONS; D0 DETECTOR; ENERGY; QCD; COLLABORATION; COLLIDERS SO - Physical Review D 2001 ;6307(7): 2178 UI - 14081 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Heidn D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, CNRS, LPNHE, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USANYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Ratio of jet cross sections at root s=630 GeV and 1800 GeV AB - The DO Collaboration has measured the inclusive jet cross section in (p) over barp collisions at roots = 630 GeV. The results for pseudorapidities \ eta \ < 0.5 are combined with our previous results at roots = 1800 GeV to form a ratio of cross sections with smaller uncertainties than either individual measurement. Next-to-leading-order QCD predictions show excellent agreement with the measurement at 630 GeV; agreement is also satisfactory for the ratio. Specifically, despite a 10% to 15% difference in the absolute magnitude, the dependence of the ratio on jet transverse momentum is very similar for data and theory MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000167573800009 L2 - PARTON DISTRIBUTIONS; (P)OVER-BAR-P COLLISIONS; GLOBAL ANALYSIS SO - Physical Review Letters 2001 ;86(12):2523-2528 2179 UI - 14171 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret E AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AD - NYU, New York, NY 10003, USAColumbia Univ, New York, NY 10027, USAUniv Nebraska, Lincoln, NE 68588, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Michigan, Ann Arbor, MI 48109, USANortheastern Univ, Boston, MA 02115, USABoston Univ, Boston, MA 02215, USAUniv Maryland, College Pk, MD 20742, USALouisiana Tech Univ, Ruston, LA 71272, USAKansas State Univ, Manhattan, KS 66506, USAUniv Kansas, Lawrence, KS 66045, USAIowa State Univ, Ames, IA 50011, USAUniv Notre Dame, Notre Dame, IN 46556, USAIndiana Univ, Bloomington, IN 47405, USANorthwestern Univ, Evanston, IL 60208, USANo Illinois Univ, De Kalb, IL 60115, USAUniv Illinois, Chicago, IL 60607, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Hawaii, Honolulu, HI 96822, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Calif Riverside, Riverside, CA 92521, USAUniv Calif Irvine, Irvine, CA 92697, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Arizona, Tucson, AZ 85721, USAUniv Lancaster, Lancaster, EnglandInst High Energy Phys, Protvino, RussiaMoscow State Univ, Moscow, RussiaInst Theoret & Expt Phys, Moscow, RussiaInst Phys Nucl, Krakow, PolandUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsCINVESTAV, Mexico City 14000, DF, MexicoSeoul Natl Univ, Seoul, South KoreaTata Inst Fundamental Res, Mumbai, IndiaUniv Delhi, Delhi 110007, IndiaPanjab Univ, Chandigarh 160014, IndiaCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceUniv Grenoble 1, IN2P3, CNRS, Inst Sci Nucl, Grenoble, FranceUniv Grenoble 1, IN2P3, CNRS, Inst Sci Nucl, Grenoble, FranceUniv San Francisco Quito, Quito, EcuadorAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Prague, Czech RepublicUniv Los Andes, Bogota, ColombiaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Buenos Aires, Buenos Aires, DF, ArgentinaUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Ratios of multijet cross sections in p(p)over-bar collisions at root s=1.8 TeV AB - We report on a study of the ratio of inclusive three-jet to inclusive two-jet production cross sections as a function of total transverse energy in p (p) over bar collisions at it center-of-mass energy roots = 1.8 TeV, using data collected with the DO detector during the 1992-1993 run of the Fermilab Tevatron Collider. The measurements are used to deduce preferred renormalization scales in perturbative O(alpha (3)(s)) QCD calculations in modeling soft-jet emission MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000167259900012 L2 - JET SO - Physical Review Letters 2001 ;86(10):1955-1960 2180 UI - 14213 AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez L AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret E AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Nunnemann T AU - Oesch L AU - Oguri V AU - Olivier B AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Gif Sur Yvette, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Inclusive jet production in p(p)over-bar collisions AB - We report a new measurement of the pseudorapidity (eta) and transverse-energy (Er) dependence of the inclusive jet production cross section in p (p) over bar collisions at roots = 1.8 TeV using 95 pb(-1) of data collected with the DO detector at the Fermilab Tevatron. The differential cross section d(2)sigma/(dE(T)d eta) is presented up to \eta\ = 3, significantly extending previous measurements. The results are in good overall agreement with next-to-leading order predictions from QCD and indicate a preference for certain parton distribution functions MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 36 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000167172400011 L2 - CROSS-SECTION; (P)OVER-BAR-P COLLISIONS; PARTON DISTRIBUTIONS; ROOT-S=1.8TEV SO - Physical Review Letters 2001 ;86(9):1707-1712 2181 UI - 14304 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grudberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RJ AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AU - Para A AD - NYU, New York, NY 10003, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Gif Sur Yvette, FrancePanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoInst NIKHEF, FOM, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAAbbott, B, NYU, New York, NY 10003, USA TI - Search for large extra dimensions in dielectron and diphoton production AB - We report a search for effects of large extra spatial dimensions in p (p) over bar collisions at a center-of-mass energy of 1.8 TeV with the DO detector, using events containing a pair of electrons or photons. The data are in good agreement with the expected background and do not exhibit evidence for large extra dimensions. We set the most restrictive lower limits to date, at the 95% C.L. on the effective Planck scale between 1.0 and 1.4 TeV for several formalisms and numbers of extra dimensions MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 52 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000166907600004 L2 - LARGE COMPACT DIMENSIONS; E(+)E(-) COLLISIONS; QUANTUM-GRAVITY; CONSTRAINTS; MILLIMETER; TEV SO - Physical Review Letters 2001 ;86(7):1156-1161 2182 UI - 14347 AU - Abbott B AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Bartlett JF AU - Bassler U AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Boos EE AU - Borcherding F AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler B AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Dahl OI AU - Davis GA AU - Davis K AU - De K AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelman R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gartung P AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gibbard B AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss JT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grundberg P AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hahn KS AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hoftun JS AU - Hou S AU - Huang Y AU - Ito AS AU - Jerger SA AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kim SK AU - Klima B AU - Klopfenstein C AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Maciel AKA AU - Madaras RM AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayoroov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Meng XC AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mincer A AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Neal HA AU - Negret JP AU - Negroni S AU - Norman D AU - Oesch L AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Pan LJ AD - NYU, New York, NY 10003, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Washington, Seattle, WA 98195, USAColumbia Univ, New York, NY 10027, USAUniv Nebraska, Lincoln, NE 68588, USAMichigan State Univ, E Lansing, MI 48824, USABoston Univ, Boston, MA 02215, USAUniv Maryland, College Pk, MD 20742, USALouisiana Tech Univ, Ruston, LA 71272, USAKansas State Univ, Manhattan, KS 66506, USAUniv Kansas, Lawrence, KS 66045, USAIowa State Univ, Ames, IA 50011, USAUniv Notre Dame, Notre Dame, IN 46556, USAIndiana Univ, Bloomington, IN 47405, USANorthwestern Univ, Evanston, IL 60208, USANo Illinois Univ, De Kalb, IL 60115, USAUniv Illinois, Chicago, IL 60607, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Hawaii, Honolulu, HI 96822, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Calif Riverside, Riverside, CA 92521, USAUniv Calif Irvine, Irvine, CA 92697, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Davis, Davis, CA 95616, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Arizona, Tucson, AZ 85721, USAUniv Lancaster, Lancaster, EnglandInst High Energy Phys, Protvino, RussiaMoscow State Univ, Moscow, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaInst Nucl Phys, Krakow, PolandUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsCINVESTAV, Mexico City 14000, DF, MexicoSeoul Natl Univ, Seoul, South KoreaTata Inst Fundamental Res, Mumbai, IndiaUniv Delhi, Delhi 110007, IndiaPanjab Univ, Chandigarh 160014, IndiaCEA, Serv Phys Particles, DAPNIA, Saclay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorAbbott, B, NYU, New York, NY 10003, USA TI - Search for electroweak production of single top quarks in p(p)over-bar collisions AB - We present a search for electroweak production of single top quarks in the electron + jets and muon + jets decay channels. The measurements use approximate to 90 pb(-1) of data from Run 1 of the Fermilab Tevatron collider, collected at 1.8 TeV with the D empty set detector between 1992 and 1995. We use events that include a tagging muon, implying the presence of a b jet. to set an upper limit at the 95% confidence level on the cross section for the s-channel process p (p) over bar --> tb + X of 39 ph. The upper limit for the t-channel process p (p) over bar --> tqb + X is 58 pb MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000166750100001 L2 - W-GLUON FUSION; DETECTOR; COLLIDER; FERMILAB SO - Physical Review D 2001 ;6303(3): 2183 UI - 13305 AU - Abdullaev FI AU - Rivera-Luna R AU - Garcia-Carranca A AU - yala-Fierro F AU - Espinosa-Aguirre JJ AD - Inst Nacl Pediat, Lab Oncol Expt, Mexico City 04530, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Cancerol, Mexico City 14000, DF, MexicoUniv Arizona, Dept Pharmacol & Toxicol, Tucson, AZ 85721, USAAbdullaev, FI, Inst Nacl Pediat, Lab Oncol Expt, Insurgentes Sur 3700-C,Torre Invest,6 Piso, Mexico City 04530, DF, Mexico TI - Cytotoxic effect of three arsenic compounds in HeLa human tumor and bacterial cells AB - Numerous epidemiological studies suggest that arsenic (As) compounds are carcinogens, however, recent data have renewed the interest in their anticarcinogenic properties. The cytotoxic effects of three arsenic compounds were assessed: sodium arsenite, sodium arsenate and sodium cacodylate, representing the trivalent and pentavalent species of arsenic, along with a dimethylated pentavalent arsenic specie. HeLa cells and Salmonella typhimurium (strains TA98 and TA100) were exposed to As compounds and the cytotoxic effects were evaluated. Alterations on RNA and DNA synthesis in HeLa cells were also examined. All arsenic compounds produced a dose-dependent inhibition on colony formation and DNA synthesis in HeLa cells, yet any of them significantly influenced RNA synthesis in these cells. No evidence of arsenic-induced mutagenicity or antimutagenicity was observed using the Ames assay. In bacterial cells, only sodium arsenite caused a dose-dependent inhibition of colony formation. Collectively, these results indicate that in both, HeLa and S. typhimurium cell systems, only trivalent sodium arsenite can act as an effective inhibitor of cell growth. The possible mechanism(s) of the cytotoxic effect of arsenite in these two different cell systems might be due to its reactivity with intracellular sulfhydryl groups. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000169792500004 L2 - arsenicals;HeLa;Salmonella typhimurium;cytotoxicity;mutagenicity;antimutagenicity;ACUTE PROMYELOCYTIC LEUKEMIA; HAMSTER OVARY CELLS; SODIUM ARSENITE; INDUCE APOPTOSIS; TRIOXIDE; GLUTATHIONE; MUTAGENICITY; TRIVALENT; MECHANISM; AMPLIFICATION SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2001 ;493(1-2):31-38 2184 UI - 12984 AU - Aburto EM AU - Cribb AE AU - Fuentealba C AD - Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Dept Anat & Physiol, Charlottetown, PE C1A 4P3, CanadaUNAM, Dept Patol, Fac Med Vet & Zootecn, Mexico City, DF, MexicoFuentealba, C, Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, Canada TI - Effect of chronic exposure to excess dietary copper and dietary selenium supplementation on liver specimens from rats AB - Objective-To determine the effects of chronic exposure to excess dietary copper (Cu) on liver specimens from rats and the effects of dietary selenium (Se) supplementation in experimental Cu toxicosis. Animals-60 weanling male Fischer 344 rats. Procedure-Rats were randomly assigned to 4 groups of 15 rats each and fed 1 of the following 4 diets: high Cu (500 mug/g)/adequate Se (0.2 mug/g); high Cu (500 mug/g)/supplemented Se (2 mug/g); adequate Cu (18 mug/g)/adequate Se (0.2 mug/g); or, adequate Cu (18 mug/g)/supplemented Se (2 mug/g). Five rats per group were euthanatized after 3, 6, and 12 months, and liver specimens were obtained for histologic examination, histochemistry, metal analysis by atomic absorption spectrophotometry, measurement of glutathione peroxidase activity. and assessment of lipid peroxidation, using quantification of malondialdehyde (MDA) by the thiobarbituric acid reaction. Results-Hepatic Cu concentration was significantly higher in rats fed high Cu diets (range, 9 to 18 mug/g of tissue [wet weight]), compared with rats receiving adequate Cu diets (4.0 to 5.7 mug/g of tissue). Rats fed high-Cu diets for 3, 6, and 12 months had mild multifocal hepatitis often surrounding necrotic foci. However, an Increase in hepatic MDA content, Indicative of lipid peroxidation, was not detected In these rats. Development of morphologic changes was not prevented by use of dietary Se supplementation. Conclusion and Clinical Relevance-Long-term exposure to excess dietary Cu caused mild hepatic lesions in Fischer 344 rats. Dietary Se supplementation did not prevent hepatic damage in rats with Cu toxicosis MH - Canada MH - Mexico|Distrito Federal PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000170755400017 L2 - INDIAN CHILDHOOD CIRRHOSIS; LIPID-PEROXIDATION; BEDLINGTON TERRIERS; ALPHA-TOCOPHEROL; WILSON DISEASE; OXIDANT INJURY; TOXICOSIS; TOXICITY; KIDNEY SO - American Journal of Veterinary Research 2001 ;62(9):1423-1427 2185 UI - 14255 AU - Acevedo E AU - Castaneda O AU - Ugaz M AU - Beaulieu AD AU - Pons-Estel B AU - Caeiro F AU - Casas N AU - Garza-Elizondo M AU - Irazoque F AU - Hinojosa W AU - Gutierrez-Urena S AU - Vandormael K AU - Rodgers DB AU - Laurenzi M AD - Merck & Co Inc, Merck Res Labs, Rahway, NJ 07065, USAClin San Felipe, Lima, PeruUniv Peruana Cayetano Heredia, Clin Angloamer, Lima, PeruHosp Maria Auxiliadora, Lima, PeruUniv Laval, Ctr Hosp, Lab Rech Arthrit, St Foy, PQ G1K 7P4, CanadaInst Cardiol Rosario, Rosario, Santa Fe, ArgentinaHosp Privado Cordoba, Cordoba, ArgentinaClin Reina Sofia, Bogota, ColombiaUANL, Univ Hosp, Serv Reumatol, Mexico City, DF, MexicoISSSTE, Ctr Med Nacl 20 Noviembre, Mexico City, DF, MexicoHosp Arzobispo Loayza, Lima, PeruHosp Civil, Unidad Invest Enfermedades Reumat, Guadalajara, Jalisco, MexicoLaurenzi, M, Merck & Co Inc, Merck Res Labs, RY33-318,126 E Lincoln Ave, Rahway, NJ 07065 USA TI - Tolerability profiles of rofecoxib (Vioxx (R)) and Arthrotoc (R) - A comparison of six weeks treatment in patients with osteoarthritis AB - Objective: To compare the incidence of selected spontaneously reported adverse events (AEs) in patients with osteoarthritis (OA) treated with rofecoxib (VIOXX, 12.5 mg qd) or Arthrotec (diclofenac 50 mg/misoprostol 200 mcg bid). Methods: Double-blind, parallel-group, 6-week study of patients aged 240 years with a clinical diagnosis of OA treated with rofecoxib or Arthrotec. Primary endpoint: self-reported diarrhea; secondary endpoints: abdominal pain, discontinuations due to AEs, GI AEs and NSAID-type GI AEs (ie., acid reflux, dyspepsia, epigastric discomfort, heartburn, nausea, vomiting). Results: Among 483 patients (80.3% females, mean age 62.1), the rofecoxib group vs the Arthrotec group respectively reported diarrhea 6.2% vs 16.2% (p<0.001); drug-related diarrhea 3.7% vs 16.2% (p<0.001); one or more clinical AEs 52.9% vs 73.0% (p<0.001); GI AEs 28.9% vs 48.5% (p<0.001); NSAID-type GI AEs 18.6% vs 29.9% (p=0.004), discontinuations due to abdominal pain 0.4% vs 3.7% (p<0.05); and discontinuations due to any AE 4.1% vs 9.1% (p=0.029). No significant differences were observed in efficacy. Conclusion: Rofecoxib 12.5 mg qd has improved GI tolerability and similar efficacy compared to Arthrotec (diclofenac 50mg/misoprostol 200 mcg bid) MH - Argentina MH - Canada MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA MH - Peru PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 21 U4 - Rheumatology U5 - J;Article AV - English IS - 0300-9742 UR - ISI:000167070500003 L2 - Arthrotec;misoprostol;Vioxx;rofecoxib;osteoarthritis;tolerability;tolerability;randomised trials;NONSTEROIDAL ANTIINFLAMMATORY DRUGS; COX-2 INHIBITOR ROFECOXIB; PLACEBO-CONTROLLED TRIAL; CYCLOOXYGENASE-2 INHIBITOR; RANDOMIZED TRIAL; DOUBLE-BLIND; GASTROINTESTINAL COMPLICATIONS; RHEUMATOID-ARTHRITIS; HEALTHY-SUBJECTS; IBUPROFEN SO - Scandinavian Journal of Rheumatology 2001 ;30(1):19-24 2186 UI - 12168 AU - Aceves MA AU - Baratto MC AU - Basosi R AU - Vazquez-Duhalt R AU - Pogni R AD - Univ Siena, Dept Chem, I-53100 Siena 1, ItalyUNAM, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoPogni, R, Univ Siena, Dept Chem, Via A Moro, I-53100 Siena 1, Italy TI - Spectroscopic characterization of a manganese-lignin peroxidase hybrid isozyme produced by Bjerkandera adusta in the absence of manganese: Evidence of a protein centred radical by hydrogen peroxide AB - Electronic absorption and electron paramagnetic resonance (EPR) spectra are reported for a novel manganese-lignin peroxidase (MnLiP) hybrid isozyme produced by Bjerkandera adusta in the absence of manganese at pH 5. The room temperature absorption and the low temperature (10 K) EPR spectra indicate that the same coordination and spin states are present at both temperatures: mainly six coordinate high spin containing low percentage six coordinate low spin ferric heme, the latter probably with a bis-imidazole coordination. A protein centred radical was detected in the presence of an excess of hydrogen peroxide and assumed to be a tryptophanyl radical. The catalytic significance of this site was addressed by specific chemical modification of the tryptophan residues that revealed a marked effect on the specific activity of the enzyme. It is proposed that substrate oxidation might proceed through a long range-electron transfer process. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Chemistry, Physical U5 - J;Article AV - English IS - 1381-1177 UR - ISI:000172747200005 L2 - EPR;spin state;heme protein;peroxidase;protein radical;CYTOCHROME-C PEROXIDASE; COPRINUS-CINEREUS PEROXIDASE; SUBSTRATE INTERACTION SITES; PHANEROCHAETE-CHRYSOSPORIUM; COMPOUND ES; CRYSTAL-STRUCTURE; RESONANCE RAMAN; HEME; OXIDATION; SPECTRA SO - Journal of Molecular Catalysis B-Enzymatic 2001 ;16(3-4):159-167 2187 UI - 11971 AU - Aceves R AU - Perez-Salas R AU - Barboza-Flores M AU - Pal U AU - Zaldivar MH AU - Piqueras J AD - Univ Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, Pue, MexicoUniv Complutense Madrid, Fac Fis, Dept Fis Mat, E-28040 Madrid, SpainAceves, R, Univ Sonora, Ctr Invest Fis, Apartado Postal 5-88, Hermosillo 83190, Sonora, Mexico TI - Cathodoluminescence in europium doped KCl crystals AB - Spectral cathodoluminescence of KCl:EU2+ (0.2% wt) crystals has been measured at different temperatures. In the 80-300 K temperature range the luminescence consists of three main broad emission bands with maxima around 418, 452, and 619nm. Based on photoluminescence studies the 418nm could be associated with the 4f(6)5d (t(2g))-4f(7) (S-8(7/2)) radiative transition of the Eu2+ ions in the KCl matrix. The band with maximum at 452 nm could be associated with the alpha-center emission as in pure KCl. The 619 nm band has been considered as a part of the luminescence modified by the absorption of the F centers formed during irradiation. The intensity of all these bands versus temperature shows a minimum around 150 K, an indication of a low defect mobility produced with the electron-beam irradiation MH - Mexico|Puebla MH - Mexico|Sonora MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1042-0150 UR - ISI:000173331100020 L2 - cathodoluminescence;alkali halides;europium;defects;F centers;excitons;THERMOLUMINESCENCE; IONS; KBR SO - Radiation Effects and Defects in Solids 2001 ;154(3-4):313-317 2188 UI - 13396 AU - Aceves R AU - Babin V AU - Flores MB AU - Fabeni P AU - Nikl M AU - Nitsch K AU - Pazzi GP AU - Salas RP AU - Zazubovich S AD - Univ Sonora, CIF US, Hermosillo 83190, Sonora, MexicoUniv Tartu, Inst Phys, EE-51014 Tartu, EstoniaCNR, IROE, I-50127 Florence, ItalyAcad Sci Czech Republ, Inst Phys, Prague 16253, Czech RepublicAceves, R, Univ Sonora, CIF US, Hermosillo 83190, Sonora, Mexico TI - Luminescence of CsPbCl3-like quantum dots in CsCl : Pb crystals AB - Absorption and luminescence characteristics of CsPbCl3-like quantum dots in as-received as well as in quenched and subsequently annealed CsCl:Pb crystals have been studied with a spectral resolution of 0.2 nm at temperatures 12-300 K. A complicated structure of absorption, emission and excitation spectra has been found and its dependence on the annealing temperature and time duration is examined. The temperature dependences of the intensities, positions and half widths of the spectral bands have been measured. An anisotropic quantum dot growth has been proposed for the explanation of the structural character of the spectra and their temperature dependences MH - Czech Republic MH - Estonia MH - Italy MH - Mexico|Sonora PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000169387200031 L2 - OPTICAL-PROPERTIES; SEMICONDUCTOR MICROCRYSTALS; SINGLE-CRYSTALS; SIZE; RECOMBINATION; CONFINEMENT; MATRICES; KINETICS; GROWTH; SHAPE SO - Physica Status Solidi B-Basic Research 2001 ;225(1):247-255 2189 UI - 13832 AU - Aceves R AU - Babin V AU - Flores MB AU - Fabeni P AU - Maaroos A AU - Nikl M AU - Nitsch K AU - Pazzi GP AU - Salas RP AU - Sildos I AU - Zazubovich N AU - Zazubovich S AD - Univ Tartu, Inst Phys, EE-51014 Tartu, EstoniaCNR, IROE, I-50127 Florence, ItalyAS CR, Inst Phys, Prague 16253, Czech RepublicUniv Sonora, CIFUS, Hermosillo 83190, Sonora, MexicoZazubovich, S, Univ Tartu, Inst Phys, Riia 142, EE-51014 Tartu, Estonia TI - Spectroscopy of CsPbBr3 quantum dots in CsBr : Pb crystals AB - Absorption, emission and excitation spectra of small CsPbBr3 aggregates (nanocrystals), thermally created in CsBr:Pb single crystals, have been studied at 4.2-300 K. A strong influence of crystal structure imperfections. lead concentration, crystal quenching conditions as well as annealing temperature and duration on the optical characteristics of CsPbBr3 nanocrystals has been detected and analysed. Quantum size effects have been observed for the systems studied. A clear structure of the spectral bands has been found for some samples. Polarization of the CsPbBr3 luminescence has been detected. New information has been obtained on the size, structure and shape of CsPbBr3 nanocrystals, their orientation in the CsBr:Pb crystal lattice and on their formation processes. (C) 2001 Elsevier Science B.V. All rights reserved MH - Czech Republic MH - Estonia MH - Italy MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000168329000004 L2 - excitons;quantum confinement;nanocrystals;CsBr : Pb;OPTICAL-PROPERTIES; SINGLE-CRYSTALS; EMISSION; HALIDES; IONS SO - Journal of Luminescence 2001 ;93(1):27-41 2190 UI - 14173 AU - Aceves R AU - Babin V AU - Flores MB AU - Fabeni P AU - Mihokova E AU - Nikl M AU - Nitsch K AU - Pazzi GP AU - Salas RP AU - Zazubovich N AU - Zazubovich S AD - Univ Sonora, CIFUS, Hermosillo 93190, Sonora, MexicoUniv Tartu, Inst Phys, EE-51014 Tartu, EstoniaCNR, IROE, I-50127 Florence, ItalyAcad Sci Czech Republ, Inst Phys, CZ-16253 Prague, Czech RepublicAceves, R, Univ Sonora, CIFUS, Hermosillo 93190, Sonora, Mexico TI - Relaxed excited states origin and structure in lead-doped caesium bromide AB - Absorption, emission and excitation spectra, polarization and decay kinetics of luminescence and their temperature dependences have been studied at 4.2-300 K for several CsBr:Pb samples with various lead concentrations. The origin and structure of the relaxed excited states responsible for the 3.33, 2.8 and 2.43 eV emission bands have been discussed. It has been concluded that the relaxed excited state model proposed for Tl+-doped caesium halides and CsCl:Pb is not valid in case of CsBr:Pb. To establish the origin of the relaxed excited states in a CsBr:Pb crystal, the luminescence characteristics of CsBr:Pb have been compared with those reported for Cs4PbBr6, PbBr2 and CsPbBr3 bulk crystals. It has been assumed that owing to a strong interaction between Pb2+ and Br- ions, the molecular-like states, which are similar to the excited levels of some stable lead-related compounds, are responsible for the luminescence of CsBr:Pb crystals MH - Czech Republic MH - Estonia MH - Italy MH - Mexico|Sonora PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000167298700020 L2 - CSBR-PB2+ CRYSTAL; DECAY KINETICS; LUMINESCENCE; EMISSION; IMPURITY; HALIDES; ION SO - Physica Status Solidi B-Basic Research 2001 ;223(3):745-756 2191 UI - 14734 AU - Acho L AU - Orlov Y AU - Solis V AD - Sci Res Ctr CICESE, San Diego, CA 92143, USAUniv Autonoma Baja California, Fac Ingn Ensenada, Ensenada 22870, Baja California, MexicoAcho, L, Sci Res Ctr CICESE, POB 434944, San Diego, CA 92143, USA TI - Non-linear measurement feedback H infinity-control of time-periodic systems with application to tracking control of robot manipulators AB - Non-linear H-infinity-controller synthesis is developed for time-periodic systems via measurement feedback. Interest is focused on a periodic controller design. Both global and local solutions of the problem are derived. The global solution is based on a suitable solution to appropriate Hamilton-Jacobi-Isaacs inequalities, whereas the local solution is derived by means of a certain perturbation of the differential Riccati equations appearing in solving the linear H-infinity-control problem for the linearized system. Theoretical results are supported by simulation of H-infinity-tracking control of a robot manipulator MH - Mexico|Baja California MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000165842300006 L2 - NONLINEAR-SYSTEMS; VARYING SYSTEMS; DISTURBANCE SO - International Journal of Control 2001 ;74(2):190-198 2192 UI - 11877 AU - Acosta G AU - Charatonik JJ AU - Illanes A AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Wroclaw, Inst Math, PL-50384 Wroclaw, PolandAcosta, G, Natl Autonomous Univ Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Irreducible continua of type A with almost unique hyperspace AB - For an irreducible continuum X of type A we study the family of all continua Y for which hyperspaces of subcontinua C(X) and C(Y) are homeomorphic. The family is determined if each layer of X is a layer of cohesion and the set of degenerate layers is dense in X MH - Mexico|Distrito Federal MH - Poland PB - TEMPE: ROCKY MT MATH CONSORTIUM RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0035-7596 UR - ISI:000173597100001 L2 - arc-like;compactification;continuum;homeomorphism;hyperspace;irreducible;type lambda;ray;unique hyperspace SO - Rocky Mountain Journal of Mathematics 2001 ;31(3):745-772 2193 UI - 13261 AU - Acosta M AU - Ares O AU - Sosa V AD - IPN, CINVESTAV, Dept Appl Phys, Unidad Merida, Merida 97310, Yuc, MexicoUniv La Habanna, IMRE, Superconduct Lab, Vedado 10400, Ciudad Habana, CubaSosa, V, IPN, CINVESTAV, Dept Appl Phys, Unidad Merida, A-P-73 Cordemex, Merida 97310, Yuc, Mexico TI - Josephson modulations of critical current above 77 K in YBa2Cu3O7-Au thin film composites grown on LaAlO3 AB - Composite films of YBa2CU3O7-AU were grown on LaAlO3 substrates using a sequential bilayer deposition process with different thickness of the Au layer. A reproducible and clear Josephson effect was observed only when the composite exhibited a labyrinth-like microstructure. Magnetic field modulation of the critical current was obtained at temperatures above 77 K. In this case gold-rich islands constrained weak-link zones, which conduced to a quasi-controlled array of Josephson junctions in the composite. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000169834400011 L2 - Josephson effect;superconducting films;YBCO-Au composites;TRANSPORT-PROPERTIES; FLOW TRANSISTORS; AU SO - Physica C 2001 ;356(3):233-238 2194 UI - 13607 AU - Adachi JA AU - Jiang ZD AU - Mathewson JJ AU - Verenkar MP AU - Thompson S AU - Martinez-Sandoval F AU - Steffen R AU - Ericsson CD AU - Dupont HL AD - St Lukes Episcopal Hosp, Internal Med Serv, Houston, TX 77030, USABaylor Coll Med, Houston, TX 77030, USAUniv Texas, Sch Med, Ctr Infect Dis, Houston, TX 77030, USAUniv Texas, Sch Publ Hlth, Houston, TX, USAGoa Med Coll, Bambolin, Goa, IndiaCornwell Reg Hosp, Montego Bay, JamaicaUniv Autonoma Guadalajara, Guadalajara, Jalisco, MexicoUniv Zurich, Zurich, SwitzerlandDuPont, HL, St Lukes Episcopal Hosp, Internal Med Serv, 6720 Bertner Ave,MC 1-164, Houston, TX 77030 USA TI - Enteroaggregative Escherichia coli as a major etiologic agent in traveler's diarrhea in 3 regions of the world AB - Enteroaggregative Escherichia coli (EAEC) has been reported to cause traveler's diarrhea and persistent diarrhea in children in developing countries and in immunocompromised patients. To clarify the prevalence of EAEC in traveler's diarrhea, we studied 636 US, Canadian, or European travelers with diarrhea: 218 in Guadalajara, Mexico (June-August 1997 and 1998), 125 in Ocho Rios, Jamaica (September 1997-May 1998), and 293 in Goa, India (January 1997-April 1997 and October 1997-February 1998). Stool samples were tested for conventional enteropathogens. EAEC strains were identified by use of the HEp-2 assay. EAEC was isolated in 26% of cases of traveler's diarrhea (ranging from 19% in Goa to 33% in Guadalajara) and was second only to enterotoxigenic E. coli as the most common enteropathogen in all areas. Identification of EAEC reduced the number of cases for which the pathogen was unknown from 327 (51%) to 237 (37%) and explained 28% of cases with unknown etiology. EAEC was a major cause of traveler's diarrhea in 3 geographically distinct study areas MH - India MH - Jamaica MH - Mexico|Jalisco MH - Switzerland MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 53 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000168959400011 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; AGGREGATIVE ADHERENCE; HEP-2 CELLS; PATTERNS; STRAINS; THERAPY; CIPROFLOXACIN; PREVENTION; DISEASE SO - Clinical Infectious Diseases 2001 ;32(12):1706-1709 2195 UI - 14425 AU - Adachi JD AU - Saag KG AU - Delmas PD AU - Liberman UA AU - Emkey RD AU - Seeman E AU - Lane NE AU - Kaufman JM AU - Poubelle PEE AU - Hawkins F AU - Correa-Rotter R AU - Menkes CJ AU - Rodriguez-Portales JA AU - Schnitzer TJ AU - Block JA AU - Wing J AU - McIlwain HH AU - Westhovens R AU - Brown J AU - Melo-Gomes JA AU - Gruber BL AU - Yanover MJ AU - Leite MOR AU - Siminoski KG AU - Nevitt MC AU - Sharp JT AU - Malice MP AU - Dumortier T AU - Czachur M AU - Carofano W AU - Daifotis A AD - McMaster Univ, Hamilton, ON, CanadaUniv Iowa, Coll Med, Iowa City, IA, USAHop Edouard Herriot, Lyon, FranceTel Aviv Univ, IL-49100 Petah Tiqwa, IsraelBone Res Ctr, W Reading, PA, USAAustin & Repatriat Med Ctr, Heidelberg, Vic, AustraliaRosalind Russell Arthrit Res Labs, San Francisco, CA, USAUniv Ziekenhuizen Gent, Ghent, BelgiumCHU Quebec, Quebec City, PQ, CanadaHosp 12 Octubre, E-28041 Madrid, SpainInst Nacl Nutr Salvador Zubiran, Delegacion Tlalpan, MexicoHop Cochin, F-75674 Paris, FranceCatholic Univ Chile, Santiago, ChileNorthwestern Univ, Chicago, IL 60611, USAJohannesburg Hosp, Parktown, South AfricaTampa Med Grp, Tampa, FL, USAUniv Ziekenhuizen Leuven, Louvain, BelgiumHosp Militar Principal, Lisbon, PortugalUniv Hosp, Med Ctr, Stony Brook, NY, USAWestern Nephrol & Metab Bone Dis PC, Lakewood, CO, USAUniv Sao Paulo, Fac Med, Sao Paulo, BrazilEndocrine Ctr Edmonton, Edmonton, AB, CanadaUniv Calif San Francisco, San Francisco, CA 94143, USAMerck & Co Inc, Rahway, NJ 07065, USAAdachi, JD, McMaster Univ, St Josephs Hosp, Dept Med, 25 Charlton Ave E,Suite 501, Hamilton, ON L8N 1Y2, Canada TI - Two-year effects of alendronate on bone mineral density and vertebral fracture in patients receiving glucocorticoids - A randomized, double-blind, placebo-controlled extension trial AB - Objective. To evaluate the continued efficacy and safety of alendronate (ALN) for up to 2 years in patients receiving glucocorticoids. Methods. This is a 12-month extension of a previously completed 1-year trial of daily ALN, performed to evaluate the effects of ALN over a total of 2 years in 66 men and 142 women continuing to receive at least 7.5 mg of prednisone or equivalent daily. All patients received supplemental calcium and vitamin D. The primary end point was the mean percentage change in lumbar spine bone mineral density (BMD) from baseline to 24 months. Other outcomes included changes in hip and total body BMD, biochemical markers of bone turnover, radiographic joint damage of the hands, and vertebral fracture incidence. Results. The mean (+/-SEM) lumbar spine BMD increased by 2.8 +/- 0.6%, 3.9 +/- 0.7%, and 3.7 +/- 0.6%, respectively, in the groups that received 5 mg, 10 mg, and 2.5/10 mg of ALN daily (P less than or equal to 0.001) and decreased by -0.8 +/- 0.6% in the placebo group (P not significant) over 24 months. In patients receiving any dose of ALN, BMD was increased at the trochanter (P less than or equal to 0.05) and maintained at the femoral neck. Total body BMD was increased in patients receiving 5 or 10 mg ALN (P less than or equal to 0.01). These 2 dose levels of ALN were more effective than placebo at all sites (P less than or equal to 0.05). Bone turnover markers (N-telopeptides of type I collagen and bone-specific alkaline phosphatase) decreased 60% and 25%, respectively, during treatment with ALN (P less than or equal to 0.05). There were fewer patients with new vertebral fractures in the ALN group versus the placebo group (0.7% versus 6.8%; P = 0.026). The safety profile was similar between treatment groups. Conclusion. Alendronate is an effective, well-tolerated therapy for the prevention and treatment of glucocorticoid-induced osteoporosis, with sustained treatment advantages for up to 2 years MH - Australia MH - Belgium MH - Brazil MH - Canada MH - Chile MH - France MH - Israel MH - Mexico|Distrito Federal MH - Portugal MH - South Africa MH - Spain MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 132 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000166659100026 L2 - CORTICOSTEROID-INDUCED OSTEOPOROSIS; RHEUMATOID-ARTHRITIS; PREVENTION; THERAPY; MASS; WOMEN; RISK; ETIDRONATE; CALCITONIN; SECONDARY SO - Arthritis and Rheumatism 2001 ;44(1):202-211 2196 UI - 14688 AU - Adam EE AU - Flores BE AU - Macias A AD - Univ Missouri, Coll Business, Dept Management, Columbia, MO 65211, USATexas A&M Univ, Coll Business Adm, Informat & Operat Management Dept, College Stn, TX 77843, USAUniv Americas, Coll Business, Dept Management, Puebla, MexicoAdam, EE, Univ Missouri, Coll Business, Dept Management, Columbia, MO 65211 USA TI - Quality improvement practices and the effect on manufacturing firm performance: evidence from Mexico and the USA AB - A comparison of organizations in Mexico and the USA demonstrates that, for these two countries, different quality improvement approaches are related to actual quality and financial performance. For 345 firms multiple quality improvement variables are correlated with seven quality measures, four financial measures, and one operating performance measure. Results suggest that in both countries an increase in employee involvement leads to improved quality-a decrease in internal failure costs, the percentage of items defective, and costs of quality. In Mexico an increase in employee knowledge about quality improvement and customer focus also leads to improved quality (as measured above). In the USA, but not in Mexico, the quality improvement approach relates to financial performance. An increase in senior executive leadership and an increased emphasis upon both design and conformance in the USA leads to an improved return on assets and increased net profit. In each country similar distributions from respondents regarding individual items that improve quality can be found, yet statistical modelling demonstrates country-specific models best explain quality improvement/performance relationships. This suggests culture-specific quality improvement models are necessary to better understand how quality may be improved globally MH - USA MH - Mexico|Puebla PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Industrial;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7543 UR - ISI:000165962100003 L2 - DEMING MANAGEMENT METHOD SO - International Journal of Production Research 2001 ;39(1):43-63 2197 UI - 14451 AU - Adersen SI AU - del Rio JM AU - Khvostitchenko D AU - Shakir S AU - Lira-Galeana C AD - Tech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkInst Mexicano Petr, Thermodynam Res Lab, Mexico City 07730, DF, MexicoAdersen, SI, Tech Univ Denmark, Dept Chem Engn, Bldg 229, DK-2800 Lyngby, Denmark TI - Interaction and solubilization of water by petroleum asphaltenes in organic solution AB - The relation between the often reported micellization of petroleum asphaltenes in organic solvents and the content of trace water in the solvent was investigated using calorimetric titration. The content of trace water in toluene (ranging from 0 to 0.047%) was found to be the driving force in establishing a measurable critical micelle concentration in the concentration range between 0.2 and 8 g/L solvent. It was determined that, for the three different asphaltenes analyzed, the calorimetric trace in the presence of 0.018 water more likely indicates a stepwise association rather than a classical micelle formation mechanism. On the basis of this result, the solubilization of water into solutions of asphaltenes in toluene was studied, and a quasi-linear relation between asphaltene concentration and water uptake was observed. From this, the Gibbs free energy of the transference of water into the solution or asphaltene micelle was determined to be around -13.4 kJ/mol at 293 K, which is in the range of hydrogen bonding formation. The solubility of asphaltene in toluene was observed to decrease significantly in water-saturated toluene at room temperature. Finally, the addition of resins (petroleum polar components) to the asphaltene system was found to eliminate the break in the curve previously assigned to CMC. These findings are important for the further understanding of asphaltene self-association, flocculation, and deposition in the oil industry MH - Denmark MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000166519100010 L2 - OIL EMULSIONS; CRUDE-OIL; AGGREGATION; MICROEMULSIONS; CALORIMETRY SO - Langmuir 2001 ;17(2):307-313 2198 UI - 13458 AU - Adhikari SK AD - Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoAdhikari, SK, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Comment on "Time-reversal symmetry-breaking superconductivity" AB - It is pointed out that erroneous Bardeen-Cooper-Schrieffer model equations have been used by Haranath Ghosh in his recent treatment of time-reversal symmetry-breaking superconductivity. Consequently, his numerical results are misleading, and his conclusions are not to the point MH - Brazil MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Editorial Material AV - English IS - 0163-1829 UR - ISI:000169283000096 L2 - PHASE-TRANSITION SO - Physical Review B 2001 ;6322(22): 2199 UI - 13924 AU - Adhikari SK AU - Casas M AU - Puente A AU - Rigo A AU - Fortes M AU - Solis MA AU - de Llano M AU - Valladares AA AU - Rojo O AD - Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilUniv Illes Balears, Dept Fis, Palma de Mallorca 07071, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAdhikari, SK, Univ Estadual Paulista, Inst Fis Teor, Rua Pamplona 145, BR-01405900 Sao Paulo, Brazil TI - Linear to quadratic crossover of Cooper-pair dispersion relation AB - Cooper pairing is studied in three dimensions to determine its binding energy for all coupling using a general separable interfermion interaction. Also considered are Cooper pairs (CPs) with nonzero center-of-mass momentum (CMM). A coupling-independent linear term in the CMM dominates the pair excitation energy in weak coupling and/or high fermion density, while the more familiar quadratic term prevails only in the extreme low-density (i.e., vacuum) limit for any nonzero coupling. The linear-to-quadratic crossover of the CP dispersion relation is analyzed numerically, and is expected to play a central role in a model of superconductivity (and superfluidity) simultaneously accommodating a Bardeen-Cooper-Schrieffer condensate as well as a Bose-Einstein condensate of CP bosons. (C) 2001 Elsevier Science B,V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000168008300003 L2 - Cooper pairs;Bose-Einstein condensation;exotic superconductivity;superfluidity;BOSE-EINSTEIN CONDENSATION; BCS-SUPERCONDUCTIVITY; ORGANIC SUPERCONDUCTORS; COHERENCE LENGTH; FERMI-LIQUID; MODEL; RENORMALIZATION; EVOLUTION; PICTURE; WAVES SO - Physica C 2001 ;351(4):341-348 2200 UI - 12107 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boehme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandFree Univ Brussels, Interuniv Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, FranceEcole Polytech, CNRS, LPNHE, IN2P3, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, CNRS, LPNHE, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Fachbereich 9, Wuppertal, Germany TI - A search for leptoquark bosons in e(-) p collisions at HERA AB - A search for scalar and vector leptoquarks coupling to first generation fermions is performed in the H1 experiment at the ep collider HERA. The analysis uses e-p data collected in 1998 and 1999 at a centre-of-mass energy of 320 GeV, corresponding to an integrated luminosity of similar to 15 pb(-1). No evidence for the direct production of such particles is found in a data sample with a large transverse momentum final state electron or with large missing transverse momentum, and constraints on leptoquark models are established. For a Yukawa coupling of electromagnetic strength leptoquarks are excluded for masses up to similar to 290 GeV. This analysis complements the leptoquark searches performed previously using data collected whilst HERA was operating with positrons instead of electrons. (C) 2001 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172803800002 L2 - DETECTOR; PAIRS SO - Physics Letters B 2001 ;523(3-4):234-242 2201 UI - 12111 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov E AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Royon C AU - Rusakov S AD - Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, Interuniv Inst High Energies ULB VUB, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCtr Etud Saclay, CEA, DSM DAPNIA, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Kernphys, Kiel, GermanySlovak Acad Sci, Sch Phys & Chem, Kosice, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, IN2P3, CNRS, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, IN2P3, CNRS, LPNHE, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rech Zentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandAdloff, C, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Photoproduction with a leading proton at HERA AB - The total cross section for the photoproduction process with a leading proton in the final state has been measured at yp centre-of-mass energies W of 91, 181 and 231 GeV. The measured cross sections apply to the kinematic range with the transverse momentum of the scattered proton restricted to P-T less than or equal to 0.2 GeV and 0.68 less than or equal to z less than or equal to 0.88, where z = E'(p)/E-p is the scattered proton energy normalised to the beam energy. The cross section d sigma (gammap-->Xp')(W, z)/dz is observed to be independent of W and z within the measurement errors and amounts to (8.05 +/- 0.06 (stat) +/- 0.89 (syst)) Pb on average. The data are well described by a Triple Regge model in which the process is mediated by a mixture of exchanges with an effective Regge trajectory of intercept alpha (i)(0) = 0.33 +/- 0.04 (stat) +/-0.04 (syst). The total cross section for the interaction of the photon with this mixture (gamma alpha (i) --> X) can be described by an effective trajectory of intercept alpha (k) (0) = 0.99 +/- 0.01 (stat) +/- 0.05 (syst). Predictions based on previous triple Regge analyses of pp --> pX data assuming vertex factorisation are broadly consistent with the yp data. The measured cross sections are compared with deep inelastic scattering leading proton data in the same region of z and p(T) for photon virtuality Q(2) > 2.5 GeV2. The ratio of the cross section for leading proton production to the total cross section is found to rise with Q(2). (C) 2001 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000172863300001 L2 - DEEP-INELASTIC SCATTERING; DIFFRACTION DISSOCIATION; (P)OVER-BAR-P COLLISIONS; CROSS-SECTIONS; H1 SO - Nuclear Physics B 2001 ;619(1-3):3-21 2202 UI - 12357 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boehme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB, VUB, InterUniv Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Chilton, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dept Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - On the rise of the proton structure function F-2 towards low x AB - A measurement of the derivative (delta ln F-2/delta ln x)(Q2) equivalent to -lambda (x, Q(2)) of the proton structure function F-2 is presented in the low x domain of deeply inelastic positron-proton scattering. For 5 x 10(-5) less than or equal to x less than or equal to 0.01 and Q(2) greater than or equal to 1.5 GeV2, lambda (x, Q(2)) is found to be independent of x and to increase linearly with ln Q(2). (C) 2001 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 52 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172156600002 L2 - QUANTUM CHROMODYNAMICS; HERA; SCATTERING; QCD SO - Physics Letters B 2001 ;520(3-4):183-190 2203 UI - 12358 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boehme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin R AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Interuniv Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-44221 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FrancePN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandCINVESTAV, Dept Fis, Mexico City, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - D*(+/-) meson production in deep-inelastic diffractive interactions at HERA AB - A measurement is presented of the cross section for D*+/- meson production in diffractive deep-inelastic scattering for the first time at HERA. The cross section is given for the process ep --> eXY, where the system X contains at least one D*+/- meson and is separated by a large rapidity gap from a low mass proton remnant system Y. The cross section is presented in the diffractive deep-inelastic region defined by 2 < Q(2) < 100 GeV2, 0.05 < y < 0.7, x(P) < 0.04, M-Y < 1.6 GeV and \t \ < 1 GeV2. The D*+/- mesons are restricted to the range P-T,P-D* > 2 GeV and \ eta (D*)\ < 1.5. The cross section is found to be 246 +/- 54 +/- 56 ph and forms about 6% of the corresponding inclusive D*+/- cross section. The cross section is presented as a function of various kinematic variables, including z(P)(obs) which is an estimate of the fraction of the momentum of the diffractive exchange carried by the parton entering the hard-subprocess. The data show a large component of the cross section at low Z(obs)(P) where the contribution of the boson-gluon-fusion process is expected to dominate. The data are compared with several QCD-based calculations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172156600003 L2 - LARGE-RAPIDITY-GAP; MONTE-CARLO GENERATOR; QUANTUM CHROMODYNAMICS; SCATTERING EVENTS; CROSS-SECTIONS; EP COLLISIONS; BARE POMERON; SMALL-X; DIS; DISSOCIATION SO - Physics Letters B 2001 ;520(3-4):191-203 2204 UI - 12759 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AU - Schilling FP AU - Schleper P AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Interuniv Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris Sud, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, IN2P3, CNRS, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandCINVESTAV, Dept Fis Ap, Merida, Yucatan, VenezuelaBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyCERN, CH-1211 Geneva 23, SwitzerlandUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoSafarik Univ, Kosice, SlovakiaNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of deeply virtual Compton scattering at HERA AB - A measurement is presented of elastic deeply virtual Compton scattering e(+) + p --> e(+) + gamma + p at HERA using data taken with the H1 detector. The cross section is measured as a function of the photon virtuality, Q(2), and the invariant mass, W, of the gammap system, in the kinematic range 2 < Q(2) < 20GeV(2), 30 < W < 120GeV and \t \ < 1GeV(2), where t is the squared momentum transfer to the proton. The measurement is compared to QCD based calculations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 87 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171218900008 L2 - ELASTIC ELECTROPRODUCTION; PARTON DISTRIBUTIONS; MESONS; CALORIMETER; J/PSI; PHOTOPRODUCTION; FACTORIZATION; ORDER; QCD SO - Physics Letters B 2001 ;517(1-2):47-58 2205 UI - 12996 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras GJ AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Heister A AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Merkel P AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Risler C AU - Rizvi E AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, InterUniv Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyDept Fis Ap CINVESTAV, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAdloff, C, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Three-jet production in deep-inelastic scattering at HERA AB - Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum transfer squared 5 < Q(2) < 5000 GeV2 and invariant three-jet masses 25 < M-3jet less than or similar to 140 GeV. Jets are defined by the inclusive k(perpendicular to) algorithm in the Breit frame. The size of the three-jet cross section and the ratio of the three-jet to the dijet cross section R-3/2 are described over the whole phase space by the predictions of perturbative QCD in next-to-leading order. The shapes of angular jet distributions deviate significantly from a uniform population of the available phase space but are well described by the QCD calculation. (C) 2001 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000170628000004 L2 - LIQUID ARGON CALORIMETER; PROTON-ANTIPROTON COLLIDER; MONTE-CARLO GENERATOR; MASS MULTIJET EVENTS; HADRON-COLLISIONS; DIJET PRODUCTION; CROSS-SECTIONS; 3-JET EVENTS; RATES; DISTRIBUTIONS SO - Physics Letters B 2001 ;515(1-2):17-29 2206 UI - 13030 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Bergen C AU - Bernardi G AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock A AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Hoprich W AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Metlica F AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham, W Midlands, EnglandUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Chilton, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Kernphys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, IN2P3, CNRS, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LPNHE, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandUniv Chicago, Enrico Fermi Inst, Chicago, IL 60637, USAAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Deep-inelastic inclusive ep scattering at low x and a determination of alpha(s) AB - A precise measurement of the inclusive deep-inelastic c(+)p scattering cross section is reported in the kinematic range 1.5 less than or equal to Q(2) less than or equal to 150 GeV2 and 3.10(-5) less than or equal to x less than or equal to 0.2. The data were recorded with the H1 detector at HERA in 1996 and 1997, and correspond to an integrated luminosity of 20 pb(-1). The double differential cross section, from which the proton structure function F-2 (x, Q(2)) and the longitudinal structure function FL (x, Q2) are extracted, is measured with typically 1% statistical and 3% systematic uncertainties. The measured derivative (partial derivativeF(2) (x, Q(2))/partial derivative ln Q(2))(x) is observed to rise continuously towards small x for fixed Q(2). The cross section data are combined with published III measurements at high Q2 for a next-to-leading order DGLAP QCD analysis. The H1 data determine the gluon momentum distribution in the range 3.10(-4) less than or equal to x less than or equal to 0.1 to within an experimental accuracy of about 3% for Q(2) = 20 GeV2. A fit of the H1 measurements and the mup data of the BCDMS collaboration allows the strong coupling constant alpha (s) and the gluon distribution to be simultaneously determined. A value of alpha (s)(M-Z(2)) = 0.1150 +/-0.0017(exp)(-0.0005)(+0.0009) (model) is obtained in NLO, with an additional theoretical uncertainty of about +/-0.005, mainly due to the uncertainty of the renormalisation scale MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 237 U4 - Physics, Particles & Fields U5 - J;Review AV - English IS - 1434-6044 UR - ISI:000170604300003 L2 - DEUTERON STRUCTURE FUNCTIONS; LIQUID ARGON CALORIMETER; GLOBAL ANALYSIS; QUANTUM CHROMODYNAMICS; PARTON DISTRIBUTIONS; MONTE-CARLO; TRANSVERSE-MOMENTUM; PROTON COLLISIONS; EVENT GENERATOR; CROSS-SECTIONS SO - European Physical Journal C 2001 ;21(1):33-61 2207 UI - 13127 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bassler U AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Bernardi G AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski L AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Merkel P AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Risler C AU - Rizvi E AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyCERN, Geneva, SwitzerlandSafarik Univ, Kosice, SlovakiaCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceUniv Zurich, Inst Phys, Zurich, SwitzerlandETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandDESY, Zeuthen, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyPaul Scherrer Inst, Villigen, SwitzerlandIst Nazl Fis Nucl, Rome, ItalyUniv Roma Tre, Dipartimento Fis, Rome, ItalyCharles Univ, Fac Math & Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv Paris 07, IN2P3, CNRS, Paris, FranceUniv Paris 06, LPNHE, Paris, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, FranceMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyPN Lebedev Phys Inst, Moscow 117924, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaUniv Mediterranee, IN2P3, CNRS, CPPM, Marseille, FranceUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandLund Univ, Dept Phys, Lund, SwedenUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandSlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Hamburg, Inst Expt Phys 2, Hamburg, GermanyDESY, D-2000 Hamburg, GermanyCEA, DSM, DAPNIA, CE Saclay, Gif Sur Yvette, FranceJoint Inst Nucl Res, Dubna, RussiaUniv Dortmund, Inst Phys, Dortmund, GermanyInst Nucl Phys, Krakow, PolandRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumInteruniv Inst High Energies, ULB, VUB, Brussels, BelgiumUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Searches at HERA for squarks in R-parity violating supersymmetry AB - A search for squarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA at a centre of mass energy of 300 GeV, using HI data corresponding to an integrated luminosity of 37 pb(-1). The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling lambda' is considered, taking into account R-parity violating and conserving decays of the squarks. No significant deviation from the Standard Model expectation is found. The results are interpreted in terms of constraints within the minimal Supersymmetric Standard Model (MSSM), the constrained MSSM and the minimal Supergravity model, and their sensitivity to the model parameters is studied in detail. For a Yukawa coupling of electromagnetic strength, squark masses below 260 GeV are excluded at 95% confidence level in a large part of the parameter space. For a 100 times smaller coupling strength masses up to 182 GeV are excluded MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000170338900003 L2 - DOUBLE-BETA-DECAY; DEEP-INELASTIC-SCATTERING; LIQUID ARGON CALORIMETER; SCALAR LEPTOQUARK PAIRS; P(P)OVER-BAR COLLISIONS; PARTON DISTRIBUTIONS; GLOBAL ANALYSIS; ROOT-S=1.8 TEV; QCD CASCADES; H1 SO - European Physical Journal C 2001 ;20(4):639-657 2208 UI - 13473 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel S AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner S AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Duprel D AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Crab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans N AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung A AU - Kastli HK AU - Kant D AU - Kapichine I AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krasny MW AU - Krehbiel R AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen K AU - Rostovtsev A AU - Royon C AU - Rusakov S AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandPaul Scherrer Inst, Villigen, SwitzerlandUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyCharles Univ, Fac Math & Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris Sud, CNRS, IN2P3, LAL, Orsay, FranceMax Planck Inst Phys, D-80805 Munich, GermanyPN Lebedev Phys Inst, Moscow 117924, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandSlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Kiel, Inst Expt & Angew Kernphys, Kiel, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyDESY, D-2000 Hamburg, GermanyCtr Etud Saclay, CEA, DSM, DAPNIA, F-91191 Gif Sur Yvette, FranceJoint Nucl Res Inst, Dubna, RussiaUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyInst Phys Nucl, Krakow, PolandRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumInteruniv Inst High Energies ULB VUB, Brussels, BelgiumRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Diffractive jet production in deep-inelastic e(+)p collisions at HERA AB - A measurement is presented of dijet and 3-jet cross sections in low-\t\ diffractive deep-inelastic scattering interactions of the type ep --> eXY, where the system X is separated by a large rapidity gap from a low-mass baryonic system Y. Data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 18.0 pb(-1), are used to measure hadron level single and double differential cross sections for 4 < Q(2) < 80 GeV2, z(p) < 0.05 and pT,(jet) > 4 GeV. The energy flow not attributed to jets is also investigated. The measurements are consistent with a factorising diffractive exchange with trajectory intercept close to 1.2 and tightly; constrain the dominating diffractive gluon distribution. Viewed in terms of the diffractive scattering of partonic fluctuations of the photon, the data require the dominance of q (q) over barq over q (q) over bar states. Soft colour neutralisation models in their present form cannot simultaneously reproduce the shapes and the normalisations of the differential cross sections. Models based on 2-gluon exchange are able to reproduce the shapes of the cross sections at low x(p) values MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 43 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000169269100003 L2 - LARGE-RAPIDITY-GAP; DIJET CROSS-SECTIONS; QUANTUM CHROMODYNAMICS; PARTON DISTRIBUTIONS; FRACTURE FUNCTIONS; SCATTERING EVENTS; POMERON STRUCTURE; HARD-SCATTERING; VIRTUAL PHOTON; EP COLLISIONS SO - European Physical Journal C 2001 ;20(1):29-49 2209 UI - 13566 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Ayyaz I AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruel P AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burkhardt H AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Chabert E AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JP AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krasny MW AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Magnussen N AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Mehta A AU - Meier K AU - Merkel P AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nunnemann T AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Riess S AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Royon C AU - Rusakov S AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Rechenzentrum, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham, W Midlands, EnglandVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna 141980, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Lund, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys, D-80805 Munich, GermanyUniv Paris Sud, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceUniv Karlsruhe, Inst Expt Kernphys, Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Rechenzentrum, Wuppertal, Germany TI - Dijet production in charged and neutral current e(+)p interactions at high Q(2) AB - Jet production in charged and neutral current events in the kinematic range of Q(2) from 640 to 36 000 GeV2 is studied in deep-inelastic positron-proton scattering at HERA. The measured rate of multijet events and distributions of jet polar angle, transverse energy, dijet mass, and other dijet variables are presented. Using parton densities derived from inclusive DIS cross sections, perturbative QCD calculations ill NLO are found to give a consistent description of both the neutral and charged current dijet production. ii direct, model independent comparison of the jet distributions in charged and neutral current events confirms that the QCD dynamics of the hadronic final state is independent of the underlying electroweak scattering process MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000169106900003 L2 - DEEP-INELASTIC-SCATTERING; LIQUID ARGON CALORIMETER; CURRENT CROSS-SECTIONS; MONTE-CARLO GENERATOR; JET EVENT RATES; QCD CASCADES; NLO QCD; HERA; FRAGMENTATION; ANNIHILATION SO - European Physical Journal C 2001 ;19(3):429-440 2210 UI - 11479 AU - Afraimovich V AU - Chazottes JR AU - Cordonet A AD - UASLP, IICO, San Luis Potosi 78000, MexicoCNRS, Ctr Phys Theor, F-13288 Marseille 09, FranceAfraimovich, V, UASLP, IICO, A Obregon 64, San Luis Potosi 78000, Mexico TI - Synchronization in directionally coupled systems: Some rigorous results AB - We prove, under some general assumptions, that master-slave synchronization implies generalized synchronization, that is we show the existence and continuity of the functional dependence between the "slave" coordinates and the "master" ones. Then, we prove that this function may be Lipschitz continuous and even less "smooth", that is only Holder continuous, depending on the coupling strength. We go beyond the above mentioned assumptions by coupling two identical maps of the interval that are neither continuous nor invertible to prove `almost-everywhere' synchronization instead of global synchronization. Then we relate the Hausdorff dimension and the dimension for Poincare recurrence of the attractor of master and slave systems. We provide some examples illustrating these results MH - France MH - Mexico|San Luis Potosi PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1531-3492 UR - ISI:000174783300002 L2 - master-slave synchronization;generalized synchronization;almost-everywhere synchronization;fractal dimensions;CHAOTIC SYSTEMS; GENERALIZED SYNCHRONIZATION; INVARIANT-MANIFOLDS; DYNAMICAL-SYSTEMS; ATTRACTORS SO - Discrete and Continuous Dynamical Systems-Series B 2001 ;1(4):421-442 2211 UI - 12185 AU - Afraimovich V AU - Babin A AU - Chow SN AD - UASLP, IICO, San Luis Potosi 78000, SLP, MexicoUniv Calif Irvine, Irvine, CA 92697, USAGeorgia Inst Technol, Sch Math, Atlanta, GA 30332, USAGeorgia Inst Technol, CDSNS, Atlanta, GA 30332, USAAfraimovich, V, UASLP, IICO, San Luis Potosi 78000, SLP, Mexico TI - Infinitely spatially complex solutions of PDE and their homotopy complexity MH - Mexico|San Luis Potosi MH - USA PB - IRVINE: INT PRESS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1019-8385 UR - ISI:000184981300003 SO - Communications in Analysis and Geometry 2001 ;9(2):281-339 2212 UI - 13639 AU - Afraimovich V AU - Chazottes JR AU - Cordonet A AD - UASLP, IICO, San Luis Potosi 78210, SLP, MexicoCNRS, Ctr Phys Theor, F-13288 Marseille 9, FranceCordonet, A, UASLP, IICO, A Obregon 64, San Luis Potosi 78210, SLP, Mexico TI - Nonsmooth functions in generalized synchronization of chaos AB - We state some analytical results on of nonsmooth functional dependence that occurs between the phase space coordinates of chaotic drive and response systems when they are synchronized. In particular, we describe the change of regularity of the synchronization function which ranges from Lipschitz to Holder continuity when the coupling strength decreases. (C) 2001 Published by Elsevier Science B.V MH - France MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000168776300015 L2 - master-slave synchronization;generalized synchronization of chaos;chaotic dynamical systems;COUPLED DYNAMICAL-SYSTEMS; INVARIANT-MANIFOLDS SO - Physics Letters A 2001 ;283(1-2):109-112 2213 UI - 12723 AU - Afraimovich VS AU - Gelover-Santiago AL AU - Lima R AD - UASLP, Inst Invest Comunicac Opt, San Luis Potosi 78210, MexicoNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoCNRS, Ctr Phys Theor, F-13288 Marseille, FranceAfraimovich, VS, UASLP, Inst Invest Comunicac Opt, Av Karakorum 1470,Lomas 4A, San Luis Potosi 78210, Mexico TI - Cluster periodic solutions in globally coupled maps AB - Globally coupled maps have been extensively studied in the last years. In a previous paper, we analyzed the phenomenon of synchronization for a family of globally coupled maps. In this paper we will study periodic cluster solutions. We rigorously prove the existence of period-two 2-cluster solutions in some regions of parameters and analytically and numerically describe their stability MH - France MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000171336700010 SO - International Journal of Bifurcation and Chaos 2001 ;11(7):1929-1936 2214 UI - 13766 AU - Afraimovich VS AU - Hsu SB AU - Lin HE AD - UASLP, IICO, San Luis Potosi 78000, MexicoNatl Tsing Hua Univ, Dept Math, Hsinchu, TaiwanAfraimovich, VS, UASLP, IICO, A Obregon 64, San Luis Potosi 78000, Mexico TI - Chaotic behavior of three competing species of May-Leonard model under small periodic perturbations AB - The influence of periodic perturbations to a Lotka-Volterra system, modeling a competition between three species, is studied, provided that in the unperturbed case the system has a unique attractor - a contour of heteroclinic orbits joining unstable equilibria. It is shown that the perturbed system may manifest regular behavior corresponding to the existence of a smooth invariant torus, and, as well, may have chaotic regimes depending on some parameters. Theoretical results are confirmed by numerical simulations MH - Mexico|San Luis Potosi MH - Taiwan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000168550500005 SO - International Journal of Bifurcation and Chaos 2001 ;11(2):435-447 2215 UI - 13152 AU - Agacino E AU - de la Mora P AU - Ruiz-Salvador AR AD - UNAM, Fac Estudios Super Cuautitlan, Ctr Invest Teor, Mexico City, DF, MexicoUNAM, Fac Ciencias, Dept Fis, Mexico City, DF, MexicoUniv La Habana, Dept Ciencia Mat, IMRE, Fac Fis, Havana 10400, CubaAgacino, E, UNAM, Fac Estudios Super Cuautitlan, Ctr Invest Teor, Mexico City, DF, Mexico TI - Reactivity analysis in diamond surfaces with a density functional calculation AB - The surface states of different diamond surfaces are studied using total and partial density of states (DOS) curves, and are related qualitatively to the reactivity of these surfaces, which are important in the process of diamond growth. The calculations combined atomic and functional density approaches with MARVIN and LMTO-ASA codes, respectively. In the atomic calculation, the interatomic potentials are as follows: the b parameter in the Morse potential is 0.5523 Angstrom, the A and B parameters in the nonbonding Lennards-Jonnes potential are 639.6258 eV Angstrom (12) and 3.632 eV Angstrom (6), and the three-body bending potential K-3, is 0.7797 eV rad(2). To validate these results, the elastic constants were evaluated, finding a good agreement with the experiment. With these potentials, a slab, for each of the diamond surfaces, of 40 carbon atoms with periodic conditions in two dimensions was optimized. The output coordinates were used for DOS calculations. These results were later verified with a surface-cluster calculation of HOMO and LUMO frontier orbitals. These were calculated using a 9-carbon cluster with the DGauss code. In a nonrelaxed surface, two surface states are identified: the first is an occupied state placed at the center of the gap, and the other, adjacent to a valence band maximum, is an empty state of p character and, therefore, potentially able to participate in chemical interactions. In the relaxation process of the surface, the surface states become narrower as the valences of the surface carbons are saturated; in this case the isolated p state participates in dangling bonds. With the monohydrogenation, the surface state placed at the center of the gap of the relaxed surface, becomes a subsurface state, that is, the highest density is not at the surface layer, but in inner layers. As a consequence, the reactivity diminishes. Therefore, it is possible to conclude that the study of surface states could give predictive information about the reactivity of surfaces MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Crystallography U5 - J;Article AV - English IS - 1040-0400 UR - ISI:000170198000002 L2 - diamond;density functional calculation;computer simulation;molecular dynamics;CHEMICAL VAPOR-DEPOSITION; SCANNING-TUNNELING-MICROSCOPY; ENERGY MINIMIZATION; MICROWAVE PLASMA; 111 SURFACES; 100 SURFACES; CHAIN MODEL; THIN-FILMS; GROWTH; MORPHOLOGY SO - Structural Chemistry 2001 ;12(2):101-111 2216 UI - 15093 AU - Aguero M AU - Bernal J AU - Makhankov A AD - Univ Autonoma Estado de Mexico, Fac Ciencias, Inst Literario 100, Toluca 50000, Edo De Mex, MexicoUniv Juarez Autonoma Tabasco, Div Ciencias Basicas, Villahermosa, Tabasco, MexicoJoint Inst Nucl Res, LCTA, Moscow 10100, RussiaAguero, M, Univ Autonoma Estado de Mexico, Fac Ciencias, Inst Literario 100, Toluca 50000, Edo De Mex, Mexico TI - Quasiclassical localization of wave packets in nonlinear Schrodinger systems AB - We consider the nonlinear Schrodinger equation with several kinds of potentials. For studying the existence and stability of the wave packets that could support these systems, a certain functional is constructed, which in some manner possesses the properties of the Lyapunov functional for analyzing the existence and stability of solutions. The general case of potential is considered and the appearance of pulsons is shown. Then we propose three examples of nonlinear classical field theories with potentials that exhibit quartic, sextic and saturable nonlinearities. This method exhibits a criteria for determining quasiclassically the self-localization of wave packets in nonintegrable systems. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Estado De Mexico MH - Mexico|Tabasco MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000089837000010 L2 - EQUATION; SYMMETRIES; SOLITONS SO - Chaos Solitons & Fractals 2001 ;12(1):113-123 2217 UI - 13113 AU - Aguilar CN AU - Augur C AU - Favela-Torres E AU - Viniegra-Gonzalez G AD - Univ Autonoma Metropolitana, Unidad Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoIRD, Paris, FranceUniv Autonoma Coahuila, Food Res Dept, Saltillo, Coahuila, MexicoFavela-Torres, E, Univ Autonoma Metropolitana, Unidad Iztapalapa, Dept Biotechnol, Col Vicentina,Deleg Iztapalapa, Mexico City 09340, DF, Mexico TI - Production of tannase by Aspergillus niger Aa-20 in submerged and solid-state fermentation: influence of glucose and tannic acid AB - Tannase production by Aspergillus niger Aa-20 was studied in submerged (SmF) and solid-state (SSF) fermentation systems with different tannic acid and glucose concentrations. Tannase activity and productivity were at least 2.5 times higher in SSF than in SmF. Addition of high tannic acid concentrations increased total tannase activity in SSF, while in SmF it was decreased. In SmF, total tannase activity increased from 0.57 to 1.03 IU/mL, when the initial glucose concentration increased from 6.25 to 25 g/L, but a strong catabolite repression of tannase synthesis was observed in SmF when an initial glucose concentration of 50 g/L was used. In SSF, maximal values of total tannase activity decreased from 7.79 to 2.51 IU when the initial glucose concentration was increased from 6.25 to 200 g/L. Kinetic results on tannase production indicate that low tannase activity titers in SmF could be associated to an enzyme degradation process which is not present in SSF. Tannase titers produced by A. niger Aa-20 are fermentation system-dependent, favoring SSF over SmF MH - France MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 21 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1367-5435 UR - ISI:000170320600008 L2 - tannase;glucose;tannic acid;submerged and solid-state fermentation;HYDROLASE EC-3.1.1.20 ACTIVITY; ACYL HYDROLASE; SUBSTRATE FERMENTATION; PURIFICATION; OPTIMIZATION; PENICILLIUM; GROWTH; FUNGI SO - Journal of Industrial Microbiology & Biotechnology 2001 ;26(5):296-302 2218 UI - 14438 AU - Aguilar CN AU - Augur C AU - Favela-Torres E AU - Viniegra-Gonzalez G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoIRD Mexico, Inst Rech Dev, Mexico, FranceViniegra-Gonzalez, G, Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Col Vicentina,Av Michoacan & Purisima,S-N POB 55-, Mexico City 09340, DF, Mexico TI - Induction and repression patterns of fungal tannase in solid-state and submerged cultures AB - Induction and repression patterns of tannase production by Aspergillus niger Aa-20 in solid-state (SSC) and submerged culture (SmC) were established. Tannic acid and glucose were used as carbon sources. Induction and repression ratios were obtained with different concentrations of tannic acid and glucose, respectively. Tolerance to high concentrations of tannic acid by A. niger Aa-20 was lower in SmC than in SSC. In SSC an increase in tannic acid enhanced the expression of tannase activity. The addition of glucose(> 20 gl(-1)) resulted in strong catabolite repression in SmC system. The tannase/biomass yield in SSC was at least 2 times higher than in SmC. The results presented demonstrate the capacity of SSC to minimize catabolite repression. The role of gallic acid in tannase regulation was also studied. (C) 2001 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0032-9592 UR - ISI:000166615600011 L2 - tannase;solid-state culture;submerged culture;induction;catabolite repression;TANNIN ACYL HYDROLASE; ASPERGILLUS-NIGER; FERMENTATION; PURIFICATION SO - Process Biochemistry 2001 ;36(6):565-570 2219 UI - 13245 AU - Aguilar JC AU - San Miguel ERD AU - de Gyves J AU - Bartsch RA AU - Kim M AD - Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409, USAUniv Nacl Autonoma Mexico, Dept Quim Analit, Fac Quim, Mexico City 04510, DF, MexicoBartsch, RA, Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA TI - Design, synthesis and evaluation of diazadibenzocrown ethers as Pb2+ extractants and carriers in plasticized cellulose triacetate membranes AB - The ligands 4,7-diaza-2,3,8,9-dibenzo-15-crown-5 (L1), 4,10-diaza-2,3,11,12-dibenzo-18-crown-6 (L2), 4,10-diaza-2,3,1 1,12-di(4 ' -tert-butylbenzo)-18-crown-6 (L3) and N,N-di(methylenecarboxyethoxy) 4,10-diaza-2,3,11,12-dibenzo-18-crown-6 (L4) have been prepared. Partition coefficients and acid dissociation constants for these four diazadibenzocrown ether compounds were determined in water-chloroform. Their effectiveness was assessed in solvent extraction of Pb2+ from aqueous solutions into toluene. Ligands 1,3 and L4 provide high selectivity for Pb2+ over Cd2+ and Zn2+ in transport across plasticized cellulose triacetate membranes. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0039-9140 UR - ISI:000169959600017 L2 - SUPPORTED LIQUID MEMBRANE; MACROCYCLE INTERACTION; KINETIC DATA; NEUTRAL MOLECULES; TRANSPORT; ION; COMPLEXATION; SEPARATIONS; LEAD(II); CATIONS SO - Talanta 2001 ;54(6):1195-1204 2220 UI - 13495 AU - Aguilera EF AU - Kolata JJ AU - Becchetti FD AU - DeYoung PA AU - Hinnefeld JD AU - Horvath A AU - Lamm LO AU - Lee HY AU - Lizcano D AU - Martinez-Quiroz E AU - Mohr P AU - O'Donnell TW AU - Roberts DA AU - Rogachev G AD - Inst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Notre Dame, Dept Phys, Notre Dame, IN 46556, USAUniv Michigan, Dept Phys, Ann Arbor, MI 48109, USAHope Coll, Dept Phys, Holland, MI 49422, USAIndiana Univ, Dept Phys, South Bend, IN 46634, USALorand Eotvos Univ, Dept Atom Phys, H-1117 Budapest, HungaryMichigan State Univ, Cyclotron Lab, E Lansing, MI 48824, USATech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, GermanyAguilera, EF, Inst Nacl Invest Nucl, Dept Acelerador, AP 18-1027, Mexico City 11801, DF, Mexico TI - Elastic scattering and transfer in the He-6+Bi-209 system below the Coulomb barrier AB - The interaction of He-6 with Bi-209 has been studied over a range of energies well below the nominal Coulomb barrier. A He-4 group of remarkable intensity, first observed in a previous experiment at near-barrier energies, continues to dominate the reaction in the sub-barrier regime. A total cross section of nearly 200 mb was measured for this group at 6 MeV below the barrier. This very large value is shown to be consistent with the total reaction cross section deduced from a simultaneously-measured elastic scattering angular distribution MH - Germany MH - Hungary MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 57 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000169182200009 L2 - DISPERSION-RELATION; NUCLEAR-REACTIONS; HALO NUCLEI; FUSION; ENERGIES; BEHAVIOR; BI-209; LI-11; HE-6 SO - Physical Review C 2001 ;6306(6): 2221 UI - 12402 AU - Aguilera JM AU - Cadoche L AU - Lopez C AU - Gutierrez G AD - Pontificia Univ Catolica Chile, Dept Chem Engn & Bioproc, Santiago, ChileInst Politecn Nacl, Escuela Ciencial Biol, Dept Grad & Invest Alimentos, Mexico City 11340, DF, MexicoAguilera, JM, Pontificia Univ Catolica Chile, Dept Chem Engn & Bioproc, POB 306, Santiago, Chile TI - Microstructural changes of potato cells and starch granules heated in oil AB - A method that mimics the frying operation was implemented to observe microstructural changes in potato cells and starch. Isolated cells were obtained by successive treatments of potato tissue with acid and alkali solutions. Potato cells were heated in oil at a rate of 40 degreesC/min or directly in hot oil (180 degreesC) using a hot stage attached to a light microscope and studied by video-microscopy. Starch granules in cells underwent rapid gelatinization, deformation and compaction into one mass that occupied the whole volume of the cell. After dehydration cells showed a distinctive outer zone and a homogeneous core. Cell walls showed no signs of disruption but at temperatures > 100 degreesC a reduction in cell area occurred. Immersion of cells in hot oil resulted in rapid swelling of starch. Relative projected area increased by 12% after 45 s of heating. Wet isolated starch granules began to expand and gelatinize at 65 degreesC and became disrupted at 120 degreesC. No changes were observed in dry starch granules subjected to a similar treatment. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0963-9969 UR - ISI:000172170800011 L2 - frying;potato;starch;cell walls;gelatinization;microscopy;microstructure SO - Food Research International 2001 ;34(10):939-947 2222 UI - 11952 AU - Ahluwalia DV AU - Kirchbach M AD - Univ Autonoma Zacatecas, Fac Fis, ISGBG, Zacatecas 98062, MexicoLos Alamos Natl Lab, Los Alamos, NM 87545, USAAhluwalia, DV, Univ Autonoma Zacatecas, Fac Fis, ISGBG, Ap Postal C-600, Zacatecas 98062, Mexico TI - Primordial spacetime foam as an origin of cosmological matter-antimatter asymmetry AB - The possibility is raised that the observed cosmological matter-antimatter asymmetry may reside in asymmetric spacetime fluctuations and their interplay with the Stuckelberg-Feynman interpretation of antimatter. The presented thesis also suggests that the effect of spacetime fluctuations is to diminish the Fine structure constant in the past. Recent studies of the QSO absorption lines provide a 4.1 standard deviation support for this prediction. Our considerations suggest that in the presence of spacetime fluctuations, the principle of local gauge invariance, and the related notion of parallel transport, must undergo fundamental changes MH - Mexico|Zacatecas MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000173439600009 L2 - QUANTUM-GRAVITY; UNCERTAINTY PRINCIPLE; DIRAC-EQUATION; TIME-FOAM; NEUTRINO; INTERFEROMETERS; VIOLATION SO - International Journal of Modern Physics D 2001 ;10(6):811-823 2223 UI - 13058 AU - Ahluwalia DV AU - Kirchbach M AD - Univ Aut Zacatecas, Fac Fis, Theoret Phys Grp, ISGBG, Zacatecas 98062, MexicoAhluwalia, DV, Los Alamos Natl Lab, Grp P-25,Mail Stop H-846, Los Alamos, NM 87545 USA TI - (1/2,1/2) representation space - An ab initio construct AB - A careful ab initio construction of the finite-mass (1/2, 1/2) representation space of the Lorentz group reveals it to be a spin-parity multiplet. In general, it does not lend itself to a single-spin interpretation. We find that the (1/2,1/2) representation space for massive particles naturally bifurcates into a triplet and a singlet of opposite relative intrinsic parties. The textbook separation into spin-1 and spin-0 states occurs only for certain limited kinematical settings. We construct a wave equation for the (1/2, 1/2) multiplet, and show that the particles and antiparticles in this representation space do not carry a definite spin but only a definite relative intrinsic parity. In general, both spin-1 and spin-0 are covariantly inseparable inhabitants of massive vector fields. This last observation suggests that scalar particles, such as the Higgs, are natural inhabitants of massive (1/2, 1/2) representation space MH - Mexico|Zacatecas MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 24 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000170476600004 L2 - Lorentz group;discrete symmetries;massive gauge fields SO - Modern Physics Letters A 2001 ;16(21):1377-1383 2224 UI - 12221 AU - Ahmadi N AU - Albar L AU - Pressoir G AU - Pinel A AU - Fargette D AU - Ghesquiere A AD - CALIM, CIRAD CA, F-34398 Montpellier 5, FranceCIMMYT, ORSTOM, LPRC, Mexico City 06600, DF, MexicoORSTOM, GeneTrop, Unite Genet, F-34032 Montpellier 1, FranceAhmadi, N, CALIM, CIRAD CA, Ave Agropolis, F-34398 Montpellier 5, France TI - Genetic basis and mapping of the resistance to Rice yellow mottle virus. III. Analysis of QTL efficiency in introgressed progenies confirmed the hypothesis of complementary epistasis between two resistance QTLs AB - Our previous studies have hypothesised that a complementary epistasis between a QTL located on chromosome 12 and a QTL located on chromosome 7 was one of the major genetic factors controlling partial resistance to Rice yellow mottle virus (RYMV). We report research undertaken to verify this hypothesis and to introgress the resistant allele of these two QTLs from an upland resistant japonica variety, Azucena. into a lowland susceptible indica variety IR64. Three cycles of molecular marker-assisted back cross breeding were performed using RFLP and microsatellite markers. Resistance to RYMV was evaluated in F-2 and F-3 offspring of the BC1 and BC2 generations. Marker-assisted introgression (MAI) was very efficient: in the selected BC3 progeny the proportion of the recipient genome was close to 95% for the ten non-carrier chromosomes, and the length of the donor chromosome segment surrounding the two QTLs was less than 20 cM. The relevancy of the complementary epistasis genetic model proposed previously was confirmed experimentally: in BC1 and BC2 generations only F-3 lines having the allele of the resistant parent on QTL(12) and QTL(7) show partial resistance to RYMV. Comparison of our experimental process of MAI with the recommendations of analytic and simulation studies pointed out the methodological flexibility of MAI. Our results also confirmed the widely admitted, but rarely verified, assumption that QTL-alleles detected in segregating populations could be treated as units of Mendelian inheritance and that the incorporation of these alleles into elite lines would result in an enhanced performance. The next step will be the design of tools for the routine use of molecular markers in breeding for partial resistance to RYMV and the development of material for the analysis of resistance mechanisms and the structure of a virus resistance gene in rice MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 20 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000172530400031 L2 - rice yellow mottle virus;partial resistance;QTL;marker assisted selection;complementary epistasis;MARKER-ASSISTED SELECTION; QUANTITATIVE TRAIT LOCI; MOLECULAR MARKERS; BREEDING PROGRAMS; ROOT MORPHOLOGY; RYMV; IDENTIFICATION; POPULATION; AFRICA; BARLEY SO - Theoretical and Applied Genetics 2001 ;103(6-7):1084-1092 2225 UI - 12194 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gerzon S AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lichtenstadt J AU - Lundberg B AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi Oxford, University, MS 38677, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 14000, DF, MexicoFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi Oxford, University, MS 38677, USA TI - Study of the decay D-0 -> K-K-K+pi(+) AB - Using data from the E791 fixed-target hadroproduction experiment at Fermilab, we have studied the Cabibbo-favored but phase-space-suppressed decay D-0-->K- K- K+ pi (+). We find the decay rate for this mode to be (0.54+/-0.16+/-0.08) x 10(-2) times that for the normalization mode D-0-->K- pi (-) pi (+) pi (+). We observe a clear signal for D-0-->phiK(-) pi (+) which is consistent with producing 0.7+/-0.3 of the D-0-K- K- K+ pi (+) signal. In the context of simple models, we use our measurements to estimate the importance of decay amplitudes that produce extra quark-antiquark pairs from the vacuum relative to those that do not MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000172450600006 L2 - PARTICLES; MESONS SO - Physical Review D 2001 ;6411(11): 2226 UI - 13545 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Deval S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gerzon S AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lichtenstadt J AU - Lundberg B AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi, University, MS 38677, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 14000, DF, MexicoFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi, University, MS 38677, USA TI - Direct measurement of the pion valence-quark momentum distribution, the pion light-cone wave function squared AB - We present the first direct measurements of the pion valence-quark momentum distribution which is related to the square of the pion light-cone wave function. The measurements were carried out using data on diffractive dissociation of 500 GeV/c pi (-) into dijets from a platinum target at Fermilab experiment E791. The results show that the /q (q) over bar > light-cone asymptotic wave function describes the data well for Q(2) similar to 10 (GeV/c)(2) or more. We also measured the transverse momentum distribution of the diffractive dijets MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 53 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168861800013 L2 - TRANSVERSE-MOMENTUM; FORM-FACTOR; QUANTUM CHROMODYNAMICS; EXCLUSIVE PROCESSES; QCD; MESONS SO - Physical Review Letters 2001 ;86(21):4768-4772 2227 UI - 13546 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gerzon S AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lichtenstadt J AU - Lundberg B AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng C AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi, University, MS 38677, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 14000, DF, MexicoFermi Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi, University, MS 38677, USA TI - Observation of color-transparency in diffractive dissociation of pions AB - We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min) --> 0), we find that when the per-nucleus cross section for this process is parametrized as sigma = sigma (0)A(alpha), alpha has values near 1.6, the exact result depending on jet transverse momentum. These values are in agreement with those predicted by theoretical calculations of color-transparency MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 42 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168861800014 L2 - LARGE MOMENTUM-TRANSFER; QUANTUM CHROMODYNAMICS; NUCLEAR TRANSPARENCY; ELASTIC-SCATTERING; DEPENDENCE; QCD SO - Physical Review Letters 2001 ;86(21):4773-4777 2228 UI - 13752 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits C AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi Oxford, University, MS 38677, USACtr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 07000, DF, MexicoFermi Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi Oxford, University, MS 38677, USA TI - Search for rare and forbidden charm meson decays D-0 -> Vl(+)l(-) and hhll AB - We report results of a search for flavor-changing neutral current (FCNC), lepton flavor, and lepton number violating decays of the D-0 (and its antiparticle) into three and four bodies. Using data from Fermilab charm hadroproduction experiment E791, we examine modes with two leptons (muons or electrons) and a rho (0), (K) over bar (*0) or phi vector meson or a nonresonant pi pi, K pi, or KK pair of pseudoscalar mesons. No evidence for any of these decays is found. Therefore, we present branching-fraction upper limits at 90% confidence level for the 27 decay modes examined(18 new) MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168525900011 L2 - PHYSICS; SYSTEM; LIMITS SO - Physical Review Letters 2001 ;86(18):3969-3972 2229 UI - 14387 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - Massafferri A AU - MayTal-Beck S AU - Meadows B AU - Neto JRT AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi Oxford, University, MS 38677, USAUniv Massachusetts, Amherst, MA 01003, USAKansas State Univ, Manhattan, KS 66506, USAIIT, Chicago, IL 60616, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USACINVESTAV, Mexico City 14000, DF, MexicoUniv Cincinnati, Cincinnati, OH 45221, USAUniv Calif Santa Cruz, Santa Cruz, CA 95064, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi Oxford, University, MS 38677, USA TI - Study of the D-s(+) -> pi(-)pi(+)pi(+) decay and measurement of f(0) masses and widths AB - From a sample of 848 +/- 44 D-s(+) --> pi (-) pi (+) pi (+) decays, we find Gamma (D-s(+) --> pi (-) pi (+) pi (+))/Gamma (D-s(+)--> phi pi (+)) = 0.245 +/- 0.028(-0.012)(+0.019). Using a Dalitz plot analysis of this three body decay, we find significant contributions from the channels rho (0)(770)pi (+), rho (0)(1450)pi (+,) f(0)(980)pi (+), f(2)(1270)pi (+), and f(0)(1370)pi (+). We also present the values obtained for masses and widths of the resonances f(0)(980) and f(0)(1370) MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 95 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000166625800005 L2 - DALITZ PLOTS SO - Physical Review Letters 2001 ;86(5):765-769 2230 UI - 14388 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GE AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - Massafferri A AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Solano J AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi Oxford, University, MS 38677, USAUniv Massachusetts, Amherst, MA 01003, USAKansas State Univ, Manhattan, KS 66506, USAIIT, Chicago, IL 60616, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USACINVESTAV, Mexico City 14000, DF, MexicoUniv Cincinnati, Cincinnati, OH 45221, USAUniv Calif Santa Cruz, Santa Cruz, CA 95064, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi Oxford, University, MS 38677, USA TI - Experimental evidence for a light and broad scalar resonance in D+ -> pi(-)pi(+)pi(+) decay AB - From a sample of 1172 +/- 61 D+ --> pi (-) pi (+) pi (+) decays, we find Gamma (D+ --> pi (-) pi (+) pi (+))/Gamma (D+ --> K- pi (+) pi (+)) = 0.0311 +/- 0.0018(-0.0026)(+0.0016). Using a coherent amplitude analysis to fit the Dalitz plot of these decays, we find strong evidence that a scalar resonance of mass 478(-23)(+24) +/- 17 MeV/c(2) and width 324(-40)(+42) +/- LI meV/c(2) accounts for approximately half or all decays MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 166 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000166625800006 L2 - PARTIAL-WAVE ANALYSIS; 450 GEV/C; SYSTEM SO - Physical Review Letters 2001 ;86(5):770-774 2231 UI - 13434 AU - Akin JE AU - rjona-Baez J AD - Rice Univ, Houston, TX 77251, USAUniv Monterrey, Monterrey, MexicoAkin, JE, Rice Univ, Houston, TX 77251, USA TI - Enhancing structural topology optimization AB - The goal pf structural optimization is to find the best possible configuration that minimizes the objective function and satisfies a set of constraints. Here we present a method based on the evolutionary structural optimization method, where the quality of the solution is improved by avoiding the chain-like sets of elements which are source of potential kinematic instabilities, and by including local error estimators. Both of these enhancements are employed to activate refining the mesh so as to obtain accurate and stable solutions as the volume removal proceeds. Several related contributions of Professor E. Hinton are cited MH - Mexico|Nuevo Leon MH - USA PB - BRADFORD: MCB U P LIMITED RP - NOT IN FILE U3 - TC 7 U4 - Computer Science, Interdisciplinary Applications;Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications;Mechanics U5 - J;Article AV - English IS - 0264-4401 UR - ISI:000169484700016 L2 - optimization;finite elements;topology;structural optimization;SHAPE SO - Engineering Computations 2001 ;18(3-4):663-675 2232 UI - 11523 AU - Akiyama J AU - Fukuda H AU - Nakamura G AU - Sakai T AU - Urrutia J AU - Zamora-Cura C AD - Tokai Univ, Res Inst Educ Dev, Shibuya Ku, Tokyo, Japan. Shizuoka Univ, Sch Adm & Informat, Shizuoka 4228526, Japan. Univ Nacl Autonoma Mexico, Inst Matemat, Area Inv Cient, Mexico City 04510, DF, Mexico TI - Universal measuring devices without gradations AB - Measuring cups are everyday instruments used to measure a required amount of liquid for many common tasks such as cooking,... etc. A measuring cup usually has gradations marked on its sides. In this paper we study measuring devices without gradations but which nevertheless can measure any integral amount, say liters, of liquid up to their full capacity. These devices will be called universal measuring devices. We determine the largest volume of a measuring device with triangular base and obtain one with rectangular base which can measure up to 691 liters MH - Japan MH - Mexico|Distrito Federal T3 - DISCRETE AND COMPUTATIONAL GEOMETRYLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle3HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBT99E AV - English IS - 0302-9743 UR - ISI:000174658800002 SO - 2001 ;():31-40 2233 UI - 11524 AU - Akiyama J AU - Sakai T AU - Urrutia J AD - Tokai Univ, Res Inst Educ Dev, Shibuya Ku, Tokyo 1510063, JapanUniv Nacl Autonoma Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, MexicoAkiyama, J, Tokai Univ, Res Inst Educ Dev, Shibuya Ku, 2-28-4 Tomigaya, Tokyo 1510063, Japan TI - Sequentially divisible dissections of simple polygons AB - A k-dissection D of a polygon P, is a partition of P into a set of subpolygons {Q(1),..., Q(m)} with disjoint interiors such that these can be reassembled to form k polygons P-1,..., P-k all similar to P. If for every j, 1 less than or equal to j less than or equal to k, the pieces of D can be assembled into j polygons, all similar to P, then D is called a sequentially k-divisible dissection. In this paper we show that any convex n-gon, n less than or equal to 5, has a sequentially k-divisible dissection with (k - 1) n + I pieces. We give sequentially k-divisible dissections for some regular polygons with n greater than or equal to 6 vertices. Furthermore, we show that any simple polygon P with n vertices has a (3k + 4)-dissection with (2n - 2) + k(2n + [n/3] - 4) pieces, k greater than or equal to 0, that can be reassembled to form 4, 7,..., or 3k + 4 polygons similar to P. We give similar results for star shaped polygons MH - Japan MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000174658800004 SO - Discrete and Computational Geometry 2001 ;2098():53-66 2234 UI - 12915 AU - Alanah F AU - Berry R AU - Ibanez J AU - Ahn F AU - Aron S AU - Barlan A AU - Gage E AU - Harwani S AU - Joseph A AU - Krueger M AU - Solinski J AU - Soneji M AU - Sumandea C AU - Walsh J AU - Zopp G AD - Loyola Univ, Dept Chem, Chicago, IL 60626, USAUniv Iberoamer, Mexico City, DF, Mexico TI - Service learning in instrumental analysis: Leaded dust sampling with 6th graders, a student devised curriculum MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690000983 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U211-U211 2235 UI - 11856 AU - Alarcon FJ AU - Garcia-Carreno FL AU - del Toro MAN AD - Univ Almeria, EPS, Dipartimento Biol Aplicada, Almeria, SpainCIBNOR, La Paz 23000, Baja Calif Sur, MexicoAlarcon, FJ, Univ Almeria, EPS, Dipartimento Biol Aplicada, Almeria, Spain TI - Effect of plant protease inhibitors on digestive proteases in two fish species, Lutjanus argentiventris and L-novemfasciatus AB - This work provides a comparative study of the inhibitory effect of several plant protein sources on digestive proteases of two snappers: yellow snapper (Lutjanus argentiventris) and dog snapper (Lutjanus novemfasciatus). Seed extracts did not affect gastric proteases whereas they significantly inhibit intestinal proteases. Inhibition of alkaline proteases showed that pancreatic proteases of L. argentiventris were more sensitive to seed protease inhibitors than those of L. novemfasciatus. Legume seeds showed the highest inhibitory capacity on alkaline proteases causing inhibition higher than 50% in total proteolytic activity. Protease inhibition on digestive extracts was assessed using different relative concentration of seed extracts and represented by constructing dose response curves. In order to reduce the inhibitory effect, seed extracts were acid-treated before the inhibition assay. Results showed that acid treatment did not affect the inhibitory capacity of seeds on alkaline proteases in both species. However, when the action of gastric enzymes was simulated on seed extracts, the inhibitory capacity was reduced significantly, mainly in the case of L. novemfasciatus. The responses of fish enzymes to heat-treated seed extracts were also tested. Only higher temperatures were capable of reducing the inhibitory capacity of seed, with the specific response to the snapper species. The use of biochemical assays allows us to quantify the action of inhibitors on total proteolytic activity. In addition, zymograms obtained by substrate-SDS-PAGE provided qualitative information about the number and type of proteases affected by each inhibitor. Each seed extract produces a characteristic profile of inhibition on alkaline protease. The results obtained are important for future formulation of feeds for these snapper species MH - Mexico|Baja California Sur MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Fisheries;Physiology U5 - J;Article AV - English IS - 0920-1742 UR - ISI:000173703400002 L2 - digestive enzyme;electrophoresis;fish;Lutjanus argentiventris;L. novemfasciatus;plant protein;proteases;protease inhibitor;snapper;SOYBEAN PROTEINASE-INHIBITORS; SEABREAM SPARUS-AURATA; PANCREATIC PROTEINASES; TRYPSIN-INHIBITORS; DIGESTIBILITIES; SURVIVAL; ENZYMES; DIETS; TROUT; RAT SO - Fish Physiology and Biochemistry 2001 ;24(3):179-189 2236 UI - 13570 AU - Alas OT AU - Tkachenko MG AU - Tkachuk VV AU - Wilson RG AU - Yaschenko IV AD - Univ Sao Paulo, Inst Matemat & Estat, BR-05389970 Sao Paulo, BrazilUniv Autonoma Metropolitana, Dept Matemat, Mexico City 09340, DF, MexicoMoscow MV Lomonosov State Univ, Dept Math & Mech, Subdept Gen Topol, Moscow 119899, RussiaAlas, OT, Univ Sao Paulo, Inst Matemat & Estat, 66281 Rua Matao,1010-CP, BR-05389970 Sao Paulo, Brazil TI - On dense subspaces satisfying stronger separation axioms AB - We prove that it is independent of ZFC whether every Hausdorff countable space of weight less than c has a dense regular subspace. Examples are given of countable Hausdorff spaces of weight c which do not have dense Urysohn subspaces. We also construct an example of a countable Urysohn space, which has no dense completely Hausdorff subspace. On the other hand, we establish that every Hausdorff space of pi -weight less than p has a dense completely Hausdorff land hence Urysohn) subspace. We show that there exists a Tychonoff space without dense normal subspaces and give other examples of spaces without "good" dense subsets MH - Brazil MH - Mexico|Distrito Federal MH - Russia PB - PRAGUE 1: CZECHOSLOVAK MATHEMATICAL JOURNAL RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0011-4642 UR - ISI:000169054300002 L2 - Hausdorff space;Urysohn space;completely Hausdorff space;filter of dense sets;CONTINUITY SO - Czechoslovak Mathematical Journal 2001 ;51(1):15-28 2237 UI - 12084 AU - Alavez S AU - Casaletti L AU - Franco-Cea A AU - Moran J AU - Cameron LC AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City, DF, MexicoUniv Sao Paulo, Dept Bioquim, BR-05508 Sao Paulo, BrazilUniv Fed Rio de Janeiro, Lab Bioquim Prot, UniGen, BR-22290 Rio De Janeiro, Brazil TI - Myosin Va (MVa) is proteolysed in CNS neurons during excitotoxic injury MH - Brazil MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000172372502341 SO - Molecular Biology of the Cell 2001 ;12():426A-426A 2238 UI - 12882 AU - Alavez S AU - Casaletti-Rosa L AU - Cameron LC AU - Moran J AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Sao Paulo, BR-05508 Sao Paulo, BrazilUniv Rio de Janeiro, Rio De Janeiro, Brazil TI - Myosin V is proteolysed in cerebellar granule neurons after excitotoxic injury MH - Brazil MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0022-3042 UR - ISI:000170789800713 SO - Journal of Neurochemistry 2001 ;78():197-197 2239 UI - 12397 AU - Albasi C AU - Tataridis P AU - Manjarrez ES AU - Taillandier P AD - ENSIACET, INP, UMR CNRS 5503, Lab Genie Chim, F-31078 Toulouse 4, FranceIPN, Unidad Profes Interdisciplinaria Biotecnol, Dept Bioingn, Mexico City 07340, DF, MexicoAlbasi, C, ENSIACET, INP, UMR CNRS 5503, Lab Genie Chim, 18 Chemin Loge, F-31078 Toulouse 4, France TI - A new tool for the quantification of microorganism interaction dynamics AB - A two-reservoir, membrane bioreactor for carrying out studies of mixed population dynamics in batch fermentation is presented. Mixing requirements and design aspects for the validity of the approach are presented and discussed. Equations describing mixing times between the reservoirs are given and compared to the experimental results. The validity of the approach is demonstrated by the study of several types of situations in the bioreactor. The main validation consists of the comparison between the results obtained in an actual mixed culture and the results obtained by keeping the strains separated. Finally, this new tool is used to study the interaction kinetics between two oenological bacteria. These experiments in liquid media help to determine the seeding conditions for a chosen strain to overgrow another strain through a quantification of the interaction dynamics MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000172079200026 SO - Industrial & Engineering Chemistry Research 2001 ;40(23):5222-5227 2240 UI - 12186 AU - Albores A AU - Ortega-Mantilla G AU - Sierra-Santoyo A AU - Cebrian ME AU - Munoz-Sanchez JL AU - Calderon-Salinas JV AU - Manno M AD - IPN, Ctr Invest & Estudios Avanzados, Secc Toxicol, Mexico City 07360, DF, MexicoIPN, Escuela Nacl Ciencias Biol, Dept Bioquim, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Bioquim, Mexico City 07360, DF, MexicoUniv Padua, Ist Med Lavoro, Padua, ItalyAlbores, A, IPN, Ctr Invest & Estudios Avanzados, Secc Toxicol, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Cytochrome P4502B (CYP2B)-mediated activation of methyl-parathion in rat brain extracts AB - The role of cytochrome P450 (CYP) and the CYP isoform involved in the activation of the widely used pesticide methyl-parathion (MePA) were investigated in rat brain extracts by measuring the effect of different CYP inhibitors on acetylcholinesterase (AChE) inhibition by MePA. Brain extracts provide a useful tool to study the activation mechanisms of organophosphorus compounds (OP) since they contain both the activating enzyme(s) and the molecular target for OP toxicity. As expected, in incubations of rat brain extract supplemented with NADPH, AChE activity was non-competitively inhibited by the presence of MePA, indicating that MePA was activated to its reactive metabolite methyl-paraoxon (MePO). Indeed, Vmax(app) decreased from 13.4 to 8.7 mu mol thionitrobenzoic acid (TNB)/min per mg protein. MePA activation by rat brain extracts, as measured by the AChE inhibition produced by the presence of the pesticide in the incubation, was fully prevented by previously bubbling the incubation mix with CO, by the presence of monoclonal anti-rat CYP2B1/2B2 antibodies and by the addition of phenobarbital (PB), a CYP2B substrate. Interestingly, MePA showed a greater affinity for CYP2B than PB. CYP I A I antibodies showed no effect on MePA activation. The presence of cytochrome P450 2B (CYP2B) in the rat brain extracts was confirmed by immunoblotting. These results demonstrate indisputably the responsibility of CYP2B in MePA activation in the rat brain in vitro, suggesting that metabolic activation of OP compounds in situ might be crucial for their organ specific toxicity to the central nervous system also in vivo. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Toxicology U5 - J;Article AV - English IS - 0378-4274 UR - ISI:000172667200002 L2 - acetylcholinesterase;brain extracts;cytochrome P4502B;xenobiotics metabolism;methyl-parathion;phenobarbital;METABOLISM; ACETYLCHOLINESTERASE; INSECTICIDES; LIVER; PHOSPHOROTHIONATE; PREGNENOLONE; INHIBITION; TOXICITY; ALBUMIN SO - Toxicology Letters 2001 ;124(1-3):1-10 2241 UI - 12213 AU - Alcolado PM AU - Alleng G AU - Bonair K AU - Bone D AU - Buchan K AU - Bush PG AU - De Meyer K AU - Garcia JR AU - Garzon-Ferreira J AU - Gayle PMH AU - Gerace DT AU - Geraldes FX AU - Jordan-Dahlgren E AU - Kjferve B AU - Klein E AU - Koltes K AU - Laydoo RS AU - Linton DM AU - Ogden JC AU - Oxenford HA AU - Parker C AU - Penchaszadeh P AU - Pors LPPJ AU - Ramirez-Ramirez J AU - Ruiz-Renteria F AU - Ryan JD AU - Smith SR AU - Tschirky J AU - Varela R AU - Walker S AU - Weil E AU - Wiebe WJ AU - Woodley JD AU - Zieman JC AD - Univ W Indies, Ctr Marine Sci, Caribbean Coastal Data Ctr, Kingston 7, JamaicaInst Marine Affairs, Carenage, Trinid & TobagoUniv Simon Bolivar, Dept Biol Organismos, Caracas 1080, VenezuelaUniv Simon Bolivar, INTECMAR, Caracas 1080, VenezuelaSaba Marine Pk, The Bottom, Saba, Neth AntillesDept Environm, Protect & Conservat Unit, Grand Cayman, W Ind Assoc StBonaire Marine Pk, Bonaire, Neth AntillesUniv Puerto Rico, Dept Marine Sci, Isla Magueyes Labs, Lajas, PR 00667, USAINVEMAR, Inst Invest Marinas & Costeras, Santa Marta, ColombiaDiscovery Bay Marine Lab, Discovery Bay, St Ann, JamaicaUniv Autonoma Santo Domingo, CIBIMA, Santo Domingo, Dominican RepBahamian Field Stn, San Salvador, BahamasUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Estac Puerto Morelos, Cancun 77500, Quintana Roo, MexicoUniv S Carolina, Dept Geol Sci, Sci Program, Columbia, SC 29208, USAUniv S Carolina, Belle W Baruch Inst Marine Biol & Coastal Res, Columbia, SC 29208, USAUniv Simon Bolivar, Dept Estudios Ambientales, Caracas 1080, VenezuelaSmithsonian Inst, Caribbean Coral Reef Ecosyst Program, Washington, DC 20560, USAUS Geol Survey, Biol Resources Div, Dept Interior, Reston, VA 20192, USAUniv W Indies, Ctr Marine Sci, Kingston 7, JamaicaFlorida Inst Oceanog, St Petersburg, FL 33701, USAMcGill Univ, Bellairs Res Inst, Holetown, St James, BarbadosUniv W Indies, Marine Resource & Environm Management Programme, Cave Hill, BarbadosStinapa Fdn, Curacao, Neth AntillesCarmabi Fdn, Curacao, Neth AntillesCtr Invest & Estudios Avanzados, IPN Unidad Merida, Merida 97310, Yucatan, MexicoCtr Invest & Documentac Costa Atlantica, Bluefields, NicaraguaCorn Isl Environm Educ Fdn, Off Mayor, Corn Isl, NicaraguaBermuda Biol Stn Res Inc, Ferry Reach GE01, St George, BermudaNature Conservancy, Latin Amer & Caribbean Div, Arlington, VA 22209, USAFdn La Salle Ciencias Nat, EDIMAR, Estac Invest Marinas Margarita, Porlamar 6301A, Isla De Margari, VenezuelaUniv Georgia, Dept Microbiol, Athens, GA 30602, USAUniv Virginia, Dept Environm Sci, Charlottesville, VA 22901, USAMinist Ciencia Tecnol & Medio Ambiente, Inst Oceanol, Playa 12100, Ciudad De La Ha, CubaLinton, DM, Univ W Indies, Ctr Marine Sci, Caribbean Coastal Data Ctr, Kingston 7, Jamaica TI - The Caribbean coastal marine productivity program (CARICOMP) AB - CARICOMP is a regional scientific program to study land-sea interaction processes in the Caribbean coastal zone. It has been collecting data since 1992, when a Data Management Centre was established at the University of the West Indies in Jamaica. Initially it focuses on documenting the structure and productivity of major coastal communities (mangrove forests, seagrass meadows and coral reefs) at relatively undisturbed sites in diverse physical settings. Second, by regular recording of physical and biological parameters, it monitors for change, seeking to distinguish natural from anthropogenic disturbance. Third it constitutes a regional network of observers, able to collaborate on studies of region-wide events. Examples are presented of the diverse data sets collected by the Program MH - Bahamas MH - Barbados MH - Bermuda MH - Colombia MH - Cuba MH - Dominican Rep MH - Jamaica MH - Mexico|Quintana Roo MH - Mexico|Yucatan MH - Neth Antilles MH - Nicaragua MH - Trinid & Tobago MH - USA MH - Venezuela MH - W Ind Assoc St PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000172609000044 L2 - SEA SO - Bulletin of Marine Science 2001 ;69(2):819-829 2242 UI - 12217 AU - Aldana L AU - Tsutsumi V AU - Craigmill A AU - Silveira MI AU - De Mejia EG AD - Univ Sonora, Dept Invest & Posgrad Alimentos, Hermosillo, Sonora, MexicoIPN, CINVESTAV, Mexico City 07738, DF, MexicoUniv Calif Davis, Davis, CA 95616, USAUniv Autonoma Queretaro, DIPA, Mexico City, DF, MexicoAldana, L, Univ Sonora, Dept Invest & Posgrad Alimentos, Apdo Postal 1658, Hermosillo, Sonora, Mexico TI - alpha-tocopherol modulates liver toxicity of the pyrethroid cypermethrin AB - The objective of the current study was to analyze the hepatotoxic effect caused by cypermethrin (CYP) in rats, and to evaluate the possible protective effect of the antioxidant alpha -tocopherol (alpha -T). Fifty male Wistar rats were given daily i.p. doses of 300 mg/kg per day of CYP during 7 days. Half of them were administered three previous doses of 100 mg/kg per day of alpha -T, followed by seven subsequent oral doses of 40 mg/kg per day of alpha -T. The levels of biochemical indicators and histological liver damage were determined, as well as DCVA in urine. CYP altered the lipid metabolism. Such alterations were inhibited 32% by alpha -T, except for LDL. Alterations in AST were modulated in 29%. In the histology, alpha -T reduced mitochondria damage, and swelling of the endoplasmic reticulum of the liver cells. The results suggest that alpha -T can modify CYP metabolism, changing the lipidic profile and the histological analysis. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 12 U4 - Toxicology U5 - J;Article AV - English IS - 0378-4274 UR - ISI:000172529800013 L2 - cypermethrin;pyrethroids;alpha-tocopherol;VITAMIN-E; LIPID-PEROXIDATION; BREAST-CANCER; RATS; SYSTEM SO - Toxicology Letters 2001 ;125(1-3):107-116 2243 UI - 13948 AU - Aleman V AU - Osorio B AU - Chavez O AU - Rendon A AU - Mornet D AU - Martinez D AD - Inst Politecn Nacl, CINVESTAV, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoInst Bouisson Bertrand, INSERM, U128, Grp Muscles & Pathol, F-34196 Montpellier 5, FranceINSERM, EMI 99 18, Lab Physiopathol Cellulaire & Mol Retine, F-67091 Strasbourg, FranceAleman, V, Inst Politecn Nacl, CINVESTAV, Dept Fisiol Biofis & Neurociencias, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Subcellular localization of Dp71 dystrophin isoforms in cultured hippocampal neurons and forebrain astrocytes AB - It has been suggested that the absence or altered structure of Dp71, a C-terminal dystrophin gene encoded protein, is responsible for mental alterations observed in about 30% of Duchenne muscular dystrophy patients. Most of these patients have premature translational termination or point mutations at the C-terminal domain of this gene. In brain, Dp71 is the major protein product of the dystrophin gene. To determine the func tion of Dp71 isoforms in this organ, it is important to document their presence and intracellular localization in brain cells. Extracts from cultured hippocampal neurons and forebrain astrocytes and 5F3 and Dys 2 monoclonal antibodies were thus used for western blots. In these conditions, two Dp71 isoforms spliced or not at exon 78 were detected in both cells (Dp71f and Dp71d, respectively). By immunocytochemistry. we mapped Dp71f and Dp71d in the Golgi complex (GC) and in neuronal nuclei. Only Dp71d was found in cytoplasmic neurofilaments. In astrocytes, these isoforms were detected in the GC, These cell localization data suggest that these Dp71 isoforms may have different functions in the same cell or organelle, as well as in the two different cells analyzed MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Cell Biology;Microscopy U5 - J;Article AV - English IS - 0948-6143 UR - ISI:000168063600008 L2 - Dp71 isoforms;dystrophin;hippocampal neurons;forebrain astrocytes;Duchenne muscular dystrophy;DUCHENNE MUSCULAR-DYSTROPHY; PROTEIN-KINASE-C; ELECTRON-MICROSCOPIC LOCALIZATION; CENTRAL-NERVOUS-SYSTEM; NONMUSCLE TISSUES; NUCLEAR-ENVELOPE; RAT HIPPOCAMPUS; MAJOR PRODUCT; BREFELDIN-A; BRAIN SO - Histochemistry and Cell Biology 2001 ;115(3):243-254 2244 UI - 12278 AU - Aleshkevich V AU - Kartashov Y AU - Egorov A AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Pueblo, Dept Fis & Matemat, Stn Catarina Martir, Puebla, Cholula, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Vorobiovy Gory, Moscow 119899, Russia TI - Stability and formation of localized surface waves at the dielectric - photorefractive crystal boundary AB - We consider specific features of the formation of localized surface waves at the interface between linear dielectric and photorefractive crystals with a nonlocal diffusion component of nonlinear response. Profiles of the surface waves are numerically found and guiding properties of the surface are investigated. Stability of the obtained surface waves is considered and it is shown that the well-known Vakhitov-Kolokolov stability criterion derived for the local Kerr or saturable material remains legible for the medium with a nonlocal diffusion component of nonlinear response MH - Mexico|Puebla MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000172407100123 L2 - WALKING VECTOR SOLITONS; NON-LINEAR INTERFACE; PLANAR GUIDED-WAVES; SPATIAL SOLITONS; SOLITARY-WAVES; OPTICAL BEAMS; NONLINEARITY; INSTABILITY; REFLECTION; STATES SO - Physical Review e 2001 ;64(5):art-056610 2245 UI - 12706 AU - Aleshkevich V AU - Kartashov Y AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUAEM, CIICAp, Cuernavaca 62210, Morelos, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia TI - Propagation and interaction of single and incoherently coupled nondiffracting beams in photorefractive medium with purely diffusion nonlinearity AB - We have numerically found profiles of (I + I)D single and incoherently coupled nondiffracting beams in the photorefractive medium with purely diffusion nonlinearity. The main features of propagation and interaction of the nondiffracting beams are analysed and it is shown that interactions in the medium with diffusion nonlinearity are accompanied with the energy redistribution processes that can result in the fusion of the nondiffracting beams. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000171414300029 L2 - nondiffracting beams;photorefractive crystals;soliton collisions;SPATIAL SOLITONS; SCREENING SOLITONS; OPTICAL BEAMS; STEADY-STATE; CRYSTALS; BRIGHT; DARK; COLLISIONS SO - Optics Communications 2001 ;197(4-6):445-457 2246 UI - 13106 AU - Aleshkevich V AU - Kartashov Y AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, RussiaUAEM, CIICAp, Cuernavaca 62210, Morelos, MexicoAleshkevich, V, Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, Russia TI - Self-frequency shift of cnoidal waves in a medium with delayed nonlinear response AB - The influence of a sufficiently nonstationary Raman contribution to nonlinear susceptibility on the dynamics of cnoidal wave propagation in optical fibers is theoretically analyzed. The dependence of the parameter that describes the curvature of the propagation trajectory on the degree of localization of the wave energy is presented. (C) 2001 Optical Society of America MH - Mexico|Morelos MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000170280200011 L2 - OPTICAL FIBERS; DARK SOLITONS; PHOTOREFRACTIVE CRYSTALS; PROPAGATION; DYNAMICS; DECAY; BEAMS SO - Journal of the Optical Society of America B-Optical Physics 2001 ;18(8):1127-1136 2247 UI - 13502 AU - Aleshkevich V AU - Kartashov Y AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUAEM, CIICAp, Cuernavaca 66210, Morelos, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Vorobiovy Gory, Moscow 119899, Russia TI - Nonlinear unidirectional coupler in photorefractive medium with diffusion nonlinearity AB - We consider switching characteristics of the nonlinear unidirectional coupler embedded in the photorefractive medium with purely diffusion nonlinearity, Transmission characteristics for both two- and three-waveguide couplers are presented. It is shown that the part of energy transmitted into the second waveguide in two-waveguide coupler monotonically decreases with increase of input energy, i.e. no threshold energy value exists. It is also shown that due to the specific character of diffusion nonlinearity transmission characteristics of the three-waveguide coupler strongly depends on the relative disposition of the input waveguide. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000169163000029 L2 - photorefractive crystals;unidirectional coupler;diffusion nonlinearity;DIRECTIONAL-COUPLERS; FIBER COUPLERS; SOLITON STATES; WAVE-GUIDES; BIFURCATION PHENOMENA; SCREENING SOLITONS; SPATIAL SOLITONS; COHERENT COUPLER; CORE COUPLERS; OPTICAL BEAMS SO - Optics Communications 2001 ;192(3-6):365-375 2248 UI - 13925 AU - Aleshkevich V AU - Kartashov Y AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, RussiaUAEM, CIICAp, Cuernavaca 62210, Morelos, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Vorobiovy Gory, Moscow 119899, Russia TI - On the possibility of suppression of the self-frequency shift of the cnoidal waves in the medium with delayed nonlinear response by bandwidth-limited amplification AB - We both theoretically and numerically investigate conditions of the stable balance between competing processes of the Raman self-frequency shift and bandwidth-limited amplification of the periodical cnoidal waves. The dependencies of the initial wave form-factor and frequency shift necessary for the stable balance on the parameter describing degree of localisation of the wave energy are presented. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000168015700049 L2 - self-frequency shift;cnoidal waves;bandwidth-limited amplification;OPTICAL FIBERS; DARK SOLITONS; PHOTOREFRACTIVE CRYSTALS; COMPRESSION; PROPAGATION; DYNAMICS; DECAY; BEAMS SO - Optics Communications 2001 ;190(1-6):373-383 2249 UI - 14441 AU - Aleshkevich V AU - Kartashov Y AU - Vysloukh V AD - Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, RussiaUniv Autonoma Estado Morelos Direcc, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoKartashov, Y, Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Vorobiovy Gory, Moscow 119899, Russia TI - Self-bending of the coupled spatial soliton pairs in a photorefractive medium with drift and diffusion nonlinearity AB - The propagation of two incoherently coupled laser beams (coupled soliton pairs) in the photorefractive crystal with drift and diffusion components of nonlinear response is investigated. By the effective particles method we have shown that not only the well-known Manakov's soliton pairs but also asymmetric pairs can propagate undistorted in photorefractive crystal with diffusion nonlinearity along the parabolic trajectory for the definite relations of propagation constants. We numerically found the exact profiles of the specific multi-hump soliton solutions that are possible only in the photorefractive medium with nonlocal diffusion response. The stability properties and specific features of pair collisions are analyzed MH - Mexico|Morelos MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000166405100072 L2 - PARTIALLY COHERENT SOLITONS; WAVE-GUIDES; OPTICAL BEAMS; CRYSTALS; DARK; COLLISION; FIBERS; BRIGHT; SHAPE SO - Physical Review e 2001 ;6302(1): 2250 UI - 13018 AU - Alexandrova L AU - Le Lagadec R AU - Pfeffer M AU - Ryabov AD AD - UNAM, Inst Quim, Mexico City, DF, MexicoUNAM, Inst Invest Mat, Mexico City, DF, MexicoUniv Strasbourg 1, CNRS, UMR 75, Lab Synth Met Induites, F-67070 Strasbourg, FranceMoscow MV Lomonosov State Univ, Dept Chem, Moscow, Russia TI - Synthesis and crystal structure of cyclometalated ruthenium(II) complexes for bioapplications MH - France MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Meeting Abstract AV - English IS - 0162-0134 UR - ISI:000170467300215 SO - Journal of Inorganic Biochemistry 2001 ;86(1):120-120 2251 UI - 15163 AU - Alexandrova L AU - Sansores E AU - Martinez E AU - Rodriguez EE AU - Gerasimov G AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Dept Polimeros, Mexico City 04510, DF, MexicoKarpov Inst Phys Chem, Moscow 103064, RussiaAlexandrova, L, Natl Autonomous Univ Mexico, Inst Invest Mat, Dept Polimeros, Circuito Exterior S-N,Ciudad Univ,Apdo Postal 70-, Mexico City 04510, DF, Mexico TI - The metal nature effects in cryopolymerized metalated poly-p-xylylene AB - Ag-, Mg- and Mn-containing poly-p-xylylenes were obtained by solid-state photopolymerization of metal-p-xylylene mixtures at 77 K. Interaction of the metals with p-xylylene before and after its polymerization was studied using IR and UV-Vis spectroscopies. It was shown that Mg and Mn form strongly optically absorbing complexes with p-xylylene during codeposition, whereas Ag produces nanoclusters without chemical interaction with monomer and these clusters remain in the polymer matrix practically unchanged. Mg forms ionic complexes with a large contribution of covalent bonding. The p-xylylene in such complexes exists in the form close to its benzenoid one. During polymerization the complexes transform into sigma-bonded organomagnesium compounds incorporated within the polymer chains. Mn as a transition metal produces complexes of two types. Complexes of the first type are similar to those of Mg demonstrating similar behavior in course of polymerization, whereas those of the second type, formed by the interaction of d-orbitals of Mn with pi-orbitals of p-xylylene, are destroyed during polymerization. (C) 2000 published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000089548700030 L2 - metal-polymer systems;poly-p-xylylene;metal clusters;CRYOCHEMICAL SYNTHESIS; CONTAINING POLY(P-XYLYLENE); CLUSTERS; MAGNESIUM; COLLOIDS; MATRIX SO - Polymer 2001 ;42(1):273-280 2252 UI - 11710 AU - Alexeev AD AU - Bronnikov KA AU - Kolosnitsyn NI AU - Konstantinov MY AU - Melnikov VN AU - Sanders AJ AD - RGS, Moscow 117313, RussiaCINVESTAV, Mexico City 07360, DF, MexicoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAAlexeev, AD, RGS, 3-1 M Ulyanovoy St, Moscow 117313, Russia TI - Measurement of the gravitational constant G in space (SEE Project): sensitivity to orbital parameters and space charge effect AB - We describe some new estimates concerning the recently proposed SEE (Satellite Energy Exchange) experiment for measuring the gravitational interaction parameters in space. The experiment entails precision tracking of the relative motion of two test bodies (a heavy "Shepherd", and a light "Particle") on board a drag-free space capsule. The new estimates include (i) the sensitivity of Particle trajectories and G measurement to the Shepherd quadrupole moment uncertainties; (ii) the measurement errors of G and the strength of a putative Yukawa-type force whose range parameter lambda may be either of the order of a few metres or close to the Earth radius; (iii) a possible effect of the Van Allen radiation belts on the SEE experiment due to test-body electric charging. The main conclusions are that (i) the SEE concept may allow G to be measured with an uncertainty of less than 1 part in 10(7) and progress up to two orders of magnitude is possible in the assessment of possible Yukawa forces and (ii) Van Allen charging of test bodies is a significant problem but it may be solved by existing methods MH - Mexico|Distrito Federal MH - Russia MH - USA PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000174022600005 L2 - BALANCE; TESTS SO - Metrologia 2001 ;38(5):397-408 2253 UI - 14401 AU - Alexopoulos K AU - Panagiotopoulos D AU - Mavromoustakos T AU - Fatseas P AU - Paredes-Carbajal MC AU - Mascher D AU - Mihailescu S AU - Matsoukas J AD - Univ Patras, Dept Chem, Patras 26500, GreeceNatl Hellen Res Fdn, Inst Organ & Pharmaceut Chem, GR-11635 Athens, GreeceUNAM, Sch Med, Dept Physiol, Mexico City 04510, DF, MexicoUniv Craiova, Fac Med, Dept Physiol, RO-1100 Craiova, RomaniaMatsoukas, J, Univ Patras, Dept Chem, Patras 26500, Greece TI - Design, synthesis, and modeling of novel cyclic thrombin receptor-derived peptide analogues of the Ser(42)-Phe-Leu-Leu-Arg(46) motif sequence with fixed conformations of pharmacophoric groups: Importance of a Phe/Arg/NH2 cluster for receptor activation and implications in the design of nonpeptide thrombin receptor mimetics AB - The novel cyclic analogues cyclo(Phe-Leu-Leu-Arg-epsilon Lys-Dap) (1) and cyclo(D-Phe-Leu-Leu-Arg-epsilon Lys-Dap) (2), which differ only in the absolute conformation of Phe, have been designed and synthesized based upon the minimal peptide sequence Phe-Leu-Leu-Arg which has been found to exhibit biological activity for the thrombin receptor. Compound 1, in which all amino acids have the L-configuration, exhibited higher activity in the rat aorta relaxation and rat longitudinal muscle bioassays compared to compound 2, in which the Phe residue is in the D-configuration. This is attributed to the spatial proximity of the Phe and Arg in compound 1 which does not exist in its diastereomeric compound 2, as is depicted from a combination of NMR studies and computational analysis. Structure-activity studies (SAR) showed that the Phe and Arg side chains along with a primary amino group form an active recognition motif that is augmented by the presence of a second primary amino group in the cyclic peptide. We suggest that a comparable cyclic conformation may be responsible for the interaction of linear TRAPs with the thrombin receptor. The validity of this proposition was tested by the synthesis of four active nonpeptide thrombin receptor mimetics. Substance (S)-N-(6-guanidohexanoyl)-N'-(2-amino-3-phenylpropionyl)piperazine (3), in which the pharmacophoric phenyl, guanidino, and amino groups were incorporated onto a piperazine template, was found to be the most active compared to the other synthesized compounds which lack the amino pharmacophoric group MH - Greece MH - Mexico|Distrito Federal MH - Romania PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Medicinal U5 - J;Article AV - English IS - 0022-2623 UR - ISI:000166699700006 L2 - GASTRIC SMOOTH-MUSCLE; AGONIST PEPTIDES; TERMINAL DOMAINS; NMR-SPECTROSCOPY; ANGIOTENSIN-II; DIMETHYLSULFOXIDE; PEPTIDOMIMETICS; POLYPEPTIDES; CONTRACTILE; MECHANISM SO - Journal of Medicinal Chemistry 2001 ;44(3):328-339 2254 UI - 14021 AU - Alfaro EJ AU - Perez E AU - Delgado RMG AU - Martos MA AU - Franco J AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoAlfaro, EJ, CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain TI - Detection of a corrugated velocity pattern in the spiral galaxy NGC 5427 AB - Here we report the detection, in H alpha emission, of a radial corrugation in the velocity field of the spiral galaxy NGC 5427. The central velocity of the H alpha line displays coherent, wavy-like variations in the vicinity of the spiral arms. The spectra along three different arm segments show that the maximum amplitude of the sinusoidal line variations are displaced some 500 pc from the central part of the spiral arms. The peak blueshifted velocities appear some 500 pc upstream of the arm, whereas the peak red-shifted velocities are located some 500 pc downstream of the arm. This kinematical behavior is similar to the one expected in a galactic bore generated by the interaction of a spiral density wave with a thick gaseous disk, as recently modeled by Martos & Cox MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000167863200023 L2 - galaxies : individual (NGC 5427);galaxies : kinematics and dynamics;galaxies : spiral;galaxies : structure;STAR-FORMATION; GALACTIC DISK; DISTRIBUTIONS; POPULATION; DENSITY; CLOUDS; SHOCK; ARMS SO - Astrophysical Journal 2001 ;550(1):253-260 2255 UI - 12021 AU - Alfaro S AU - Arruebo M AU - Coronas J AU - Menendez M AU - Santamaria J AD - Univ Zaragoza, Fac Sci, Dept Environm Chem & Engn, E-50009 Zaragoza, SpainCtr Adv Mat Res, Chihuahua 31109, MexicoSantamaria, J, Univ Zaragoza, Fac Sci, Dept Environm Chem & Engn, E-50009 Zaragoza, Spain TI - Preparation of MFI type tubular membranes by steam-assisted crystallization AB - Zeolite MFI membranes were successfully prepared on both alumina and stainless steel tubular supports by crystallization of previously deposited silicate layers under a steam atmosphere. The resultant membranes were able to separate n/isobutane mixtures at relatively high temperatures, displaying separation selectivities of 11.3, 8.9 and 2.5 at 100, 230 and 330 degreesC, respectively. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Chihuahua MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000173168000012 L2 - zeolite membrane;steam-assisted crystallization;butane isomers separation;ZEOLITE MEMBRANES; DRY-GEL; ZSM-5; PHASE SO - Microporous and Mesoporous Materials 2001 ;50(2-3):195-200 2256 UI - 13617 AU - Algora A AU - Cseh J AU - Hess PO AU - Hunyadi M AD - Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoAlgora, A, Hungarian Acad Sci, Inst Nucl Res, PF 51, H-4001 Debrecen, Hungary TI - Clusterization of heavy nuclei from the microscopic point of view: Application of the U(3) selection rule to Cf-252 AB - Microscopic aspects of the fission channels of Cf-252 are studied using the U(3) selection rule. Effective U(3) symmetry labels, which are consistent with deformation, are used to characterize the parent and daughter nuclei. Our study shows a non-uniform structural dependence of the relative preference for different fission channels MH - Hungary MH - Mexico|Distrito Federal PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000168898400016 L2 - binary fission channels;U(3) selection rules;SPONTANEOUS FISSION; EMISSION; STATES SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2001 ;13(1-3):145-148 2257 UI - 12239 AU - Allahverdi R AU - Enqvist K AU - Mazumdar A AU - Perez-Lorenzana A AD - TU Muenchen, Dept Phys, D-85748 Garching, GermanyUniv Helsinki, Dept Phys, FIN-00014 Helsinki, FinlandUniv Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, FinlandAbdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoAllahverdi, R, TU Muenchen, Dept Phys, James Frank Str, D-85748 Garching, Germany TI - Baryogenesis in theories with large extra spatial dimensions AB - We describe a simple and predictive scenario for baryogenesis in theories with large extra dimensions which resembles Affleck-Dine baryogenesis. The Affleck-Dine field is a complex scalar field carrying a U(1)(chi) charge which is dynamically broken after the end of inflation. This generates an excess of chi over <()over bar> which then decays into Standard Model fermions to produce an excess of baryons over antibaryons. Our model is very constrained because the Affleck-Dine field has to be sufficiently flat during inflation. It is also a source for density fluctuations which can be tested in the coming satellite and balloon experiments. (C) 2001 Elsevier Science B.V. All rights reserved MH - Finland MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 36 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000172602000012 L2 - NEUTRON-ANTINEUTRON OSCILLATIONS; QUANTUM-GRAVITY SCALE; ISOCURVATURE FLUCTUATIONS; SUBMILLIMETER DIMENSIONS; EARLY UNIVERSE; DARK-MATTER; INFLATION; BARYON; SEARCH; TEV SO - Nuclear Physics B 2001 ;618(1-2):277-300 2258 UI - 12816 AU - Allahverdi R AU - Mazumdar A AU - Perez-Lorenzana A AD - Tech Univ Munich, Dept Phys, D-85748 Garching, GermanyAbdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyIPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoAllahverdi, R, Tech Univ Munich, Dept Phys, James Frank Str, D-85748 Garching, Germany TI - Final reheating temperature on a single brane AB - We make a generic remark on thermal history of a single brane cosmology in models with an infinitely large single extra dimension. We point out that the reheat temperature of the Universe is bounded by an excess production of gravitons from the thermal bath. The actual bound is given by the brane tension. If the initial temperature of the Universe is larger than this bound, then an efficient graviton production shall prevail. However, the brane cools down gradually as the Kaluza-Klein gravitons take the energy in excess away from the brane. The cooling continues until the radiation dominated phase is restored, which occurs before the big bang nucleosynthesis. We argue whatsoever be the early evolution of the Universe, the final radiation dominated phase always starts after the Universe transits from non-conventional era to the standard cosmological era. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171122000026 L2 - EXTRA DIMENSION; COSMOLOGICAL CONSTRAINTS; QUANTUM-GRAVITY; HIERARCHY; PHENOMENOLOGY; MILLIMETER; SCALE; MODEL; TEV SO - Physics Letters B 2001 ;516(3-4):431-438 2259 UI - 12720 AU - Almanza O AU - Rabago LOAY AU - Rodriguez-Perez MA AU - Gonzalez A AU - de Saja JA AD - Univ Valladolid, Fac Ciencias, Dept Fis Mat Condensada, E-47011 Valladolid, SpainUniv Nacl Colombia, Dept Fis, Santafe De Bogota, ColombiaUniv Autonoma Queretaro, Fac Ingn, Queretaro, MexicoRodriguez-Perez, MA, Univ Valladolid, Fac Ciencias, Dept Fis Mat Condensada, E-47011 Valladolid, Spain TI - Structure-property relationships in polyolefin foams AB - Two theoretical models that can be used to predict the thermal conductivity and Young's modulus of low-density polyethylene (LDPE) foams produced by a high-pressure nitrogen solution process are presented. The main factors that influence the properties of these materials were studied in terms of these models. The results show that the two properties depend on different factors. Moreover, the matrix polymer morphology of the foams was studied and compared to that of the solid sheet from which the foams were manufactured MH - Colombia MH - Mexico|Queretaro MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0022-2348 UR - ISI:000171442300024 L2 - foam;polyethylene;polyolefin;thermal conductivity;Young's modulus;THERMAL-CONDUCTIVITY; POLYETHYLENE FOAMS; PROFILES SO - Journal of Macromolecular Science-Physics 2001 ;B40(3-4):603-613 2260 UI - 13533 AU - Alonso C AU - Andrade C AU - Castellote M AU - Castro P AD - CSIC, Inst Construct Sci Eduardo Torroja, Madrid 28033, SpainIPN, Cent Invest & Estudios Avanzados, Yucatan, MexicoAlonso, C, CSIC, Inst Construct Sci Eduardo Torroja, Apdo 19002,Serrano Galvache, Madrid 28033, Spain TI - Chloride threshold values to depassivate reinforcing bars embedded in a standardized OPC mortar - Reply to discussion MH - Mexico|Yucatan MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0008-8846 UR - ISI:000169209600023 L2 - CORROSION; CONCRETE SO - Cement and Concrete Research 2001 ;31(5):839-840 2261 UI - 12256 AU - Alonso G AU - Yang J AU - Siadati MH AU - Chianelli RR AD - Ctr Invest Mat Avanzados, Dept Catalisis, Mexico City 31109, DF, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Mexico City 31109, DF, Mexico TI - Synthesis of tetraalkylammonium thiometallates in aqueous solution AB - An aqueous solution method for the preparation of tetraalkylammonium thiometallates (R4N)(2)MS4 (R = pentyl or hexyl and, M = Mo or W) is reported. The one-step rapid substitution of [NH4](+) ions from ammonium thiomolybdate (ATM) and ammonium thiotungstate (ATT) with [(pentyl)(4)N](+) and [(hexyl)(4)N](+) ions during reactions with (pentyl)(4)NBr and (hexyl)(4)NBr, respectively, is described. One application for these tetraalkylammonium thiomolybdates and thiotungstates is as precursors for MoS2 and WS2 catalysts, which are used in industrial hydrodesulfurization and hydrodenitrogenation processes. The synthesized thiometallates were characterized using the spectroscopic techniques Fourier transform infra red (FTIR), ultra violet (UV) and, nuclear magnetic resonance (C-13 NMR) for determining their chemical structures. Thermal analyzes (TGA-DTA) were done to study the fragmentation and decomposition behavior of their molecular structures. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000172501600027 L2 - aqueous solution;thiomolybdates;thiotungstates;TRANSITION-METAL SULFIDES; IN-SITU DECOMPOSITION; ELECTRONIC-STRUCTURE; THIOMOLYBDATES; AMMONIUM; MOS2; THIOTUNGSTATES; MOLYBDENUM; CATALYSTS; COMPLEXES SO - Inorganica Chimica Acta 2001 ;325(1-2):193-197 2262 UI - 13663 AU - Alonso G AU - Berhault G AU - Chianelli RR AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, Mexico TI - Synthesis and characterization of tetraalkylammonium thiomolybdates and thiotungstates in aqueous solution AB - In this work is reported a method for the preparation of (R4N)(2)MS4 (R = Pr, Oct and M = Mo, W) in aqueous solution. The rapid substitution of (NH4) salts with [(Pro)(4)N] and [(Oct)(4)N] salts, via reaction with (Pro)(4)NBr and (Oct)(4)NBr is described. Thiomolybdates and thiotungstates characterization was performed using FT IR, UV-Vis spectroscopies and thermogravimetric analysis (TG-DTA). (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Chihuahua MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000168834600016 L2 - thiomolybdates;thiotungstates;EX AMMONIUM TETRATHIOMOLYBDATE; TUNGSTEN SULFIDE CATALYSTS; IN-SITU DECOMPOSITION; MOLYBDENUM; MOS2; HYDRODESULFURIZATION; COMPLEXES; CO SO - Inorganica Chimica Acta 2001 ;316(1-2):105-109 2263 UI - 13307 AU - Alonso R AU - Llopis I AU - Flores C AU - Murgui A AU - Timoneda J AD - Univ Valencia, Fac Farm, Secc Dept Bioquim & Biol Mol, Valencia 46100, SpainUniv Autonoma Puebla, Fac Estomatol, Dept Bioquim, Puebla 72570, MexicoTimoneda, J, Univ Valencia, Fac Farm, Secc Dept Bioquim & Biol Mol, Avda Vicent A Estelles,S-N, Valencia 46100, Spain TI - Different adhesins for type IV collagen on Candida albicans: identification of a lectin-like adhesin recognizing the 7S(IV) domain AB - Adherence of the opportunistic pathogen Candida albicans to basement membrane (BM) proteins is considered a crucial step in the development of candidiasis. In this study the interactions of C. albicans yeast cells with the three main domains of type IV collagen, a major BM glycoprotein, were analysed. C. albicans adhered to the three immobilized domains by different mechanisms. Adhesion to the N-terminal cross-linking domain (7S) required the presence of divalent cations, whereas interaction with the central collagensus domain (CC) was cation-independent. Recognition of the C-terminal noncollagenous domain (NCI) was partially cation-dependent. Binding inhibition assays with the corresponding domains in soluble form showed that these interactions were specific. Both Ca2+ and Mg2+ promoted adhesion to the 75 domain and the interaction was completely abolished by EDTA. Treatment of the 75 domain, or its subunits, with N-glycosidase F reduced yeast binding by approximately 70%. Moreover, several sugars known to be part of the N-linked oligosaccharide chains of collagen IV inhibited adhesion to immobilized 7S; N-acetylglucosamine, L-fucose and methylmannoside caused a similar inhibition whereas N-acetyllactosamine was a more effective inhibitor. In contrast, glucose, galactose, lactase or heparan sulfate did not affect yeast binding. Combinations of the inhibitory sugars at suboptimal inhibition concentrations did not reduce C. albicans adhesion snore than the individual sugars, pointing to a single lectin as responsible for the interaction. These results taken together show that C. albicans utilizes several adhesins for interacting with type IV collagen, and that at least one of them is a lectin which recognizes the 75(IV) oligosaccharide residues as its receptor MH - Mexico|Puebla MH - Spain PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000169732100026 L2 - yeast;basement membrane;adhesion;oligosaccharide binding;EXTRACELLULAR-MATRIX PROTEINS; ASPERGILLUS-FUMIGATUS CONIDIA; GLOMERULAR-BASEMENT-MEMBRANE; EPITHELIAL-CELL RECEPTORS; HIGH-AFFINITY BINDING; LENS CAPSULE; ADHERENCE; FIBRONECTIN; COMPONENTS; EXPRESSION SO - Microbiology-Sgm 2001 ;147():1971-1981 2264 UI - 13684 AU - Alonso S AU - Tanguy PA AD - CIATEC AC, Leon 37540, Gto, MexicoEcole Polytech, Dept Chem Engn, Montreal, PQ H3C 3A7, CanadaAlonso, S, CIATEC AC, Omega 201,Fracc Delta,POB 890, Leon 37540, Gto, Mexico TI - Hydrodynamic instabilities in the metering nip of a film coater MH - Canada MH - Mexico|Guanajuato PB - NORCROSS: TECH ASSN PULP PAPER IND INC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0734-1415 UR - ISI:000168662900016 SO - Tappi Journal 2001 ;84(5):67-67 2265 UI - 13812 AU - Alonso S AU - Reglat O AU - Bertrand F AU - Choplin L AU - Tanguy PA AD - Ecole Polytech, Dept Chem Engn, Montreal, PQ H3C 3A7, CanadaINPL, ENSIC, GEMICO, Nancy, FranceCoesi Inc, Montreal, PQ, CanadaCIATEC AC, Leon, Gto, MexicoTanguy, PA, Ecole Polytech, Dept Chem Engn, POB 6079,Stn Ctr Ville, Montreal, PQ H3C 3A7, Canada TI - Process viscosity in reverse roll coating AB - The rheological behaviour of paper coating colours is investigated in the metering section of a laboratory reverse roll coater. The objective is to combine measurements of pressure in the metering nip, and torque on the metering rod to calculate the process viscosity. Classical rheological tests and nip how numerical simulations are also required to complete the process viscosity evaluation. This viscosity is compared with that measured from step growth experiments in a rheometer. The process viscosity was found to be 2.5 to 6.3 times lower than the transient viscosity, depending on the coating colour formulation. The discrepancy observed between these two viscosities is mainly attributed to the rheological properties of the coating fluids. Furthermore, structure breakdown at relatively low shear rates suggests that steady state may not be reached in the metering nip. From numerical simulations, the pressure-driven contribution to the flow in the centre of the metering nip has been found constant in the case of Newtonian fluids, dependant on the shear-thinning index in the case of non-Newtonian fluids, and independent of inertia effects MH - Canada MH - France MH - Mexico|Guanajuato PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0263-8762 UR - ISI:000168482200003 L2 - metering nip;lubrication theory;process viscosity;transient viscosity;coating colour;METERING-SIZE PRESS; FINITE-ELEMENT; STEADY-STATE; COATER; SPEED; NIP; LIQUIDS; FLOWS SO - Chemical Engineering Research & Design 2001 ;79(A2):128-136 2266 UI - 12628 AU - Alos E AU - Leon JA AU - Nualart D AD - Univ Autonoma Barcelona, Fac Ciencies, Dept Matemat, E-08193 Barcelona, SpainInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoUniv Barcelona, Fac Matemat, E-08007 Barcelona, SpainAlos, E, Univ Autonoma Barcelona, Fac Ciencies, Dept Matemat, E-08193 Barcelona, Spain TI - Stochastic Stratonovich calculus fBm for fractional Brownian motion with Hurst parameter less than 1/2 AB - In this paper we introduce a Stratonovich type stochastic integral with respect to the fractional Brownian motion with Hurst parameter less than 1/2. Using the techniques of the Malliavin calculus, we provide sufficient conditions for a process to be integrable. We deduce an Ito formula and we apply these results to study stochastic differential equations driven by a fractional Brownian motion with Hurst parameter less than 1/2 MH - Mexico|Distrito Federal MH - Spain PB - HSINCHU: MATHEMATICAL SOC REP CHINA RP - NOT IN FILE U3 - TC 12 U4 - Mathematics U5 - J;Article AV - English IS - 1027-5487 UR - ISI:000171554800013 L2 - stochastic calculus;Stratonovich integral;Malliavin calculus;fractional Brownian motion;stochastic differential equations;INTEGRATION; RESPECT SO - Taiwanese Journal of Mathematics 2001 ;5(3):609-632 2267 UI - 14079 AU - Altamirano MM AU - Woolfson A AU - Donda A AU - Shamshiev A AU - Briseno-Roa L AU - Foster NW AU - Veprintsev DB AU - De Libero G AU - Fersht AR AU - Milstein C AD - Ctr Prot Engn, Cambridge CB2 2QH, EnglandMRC, Mol Biol Lab, Cambridge CB2 2QH, EnglandUniv Basel Hosp, Dept Forsch, CH-4031 Basel, SwitzerlandNatl Autonomous Univ Mexico, Dept Biochem, Cell Physiol Inst, Mexico City 04510, DF, MexicoFersht, AR, Ctr Prot Engn, Hills Rd, Cambridge CB2 2QH, England TI - Ligand-independent assembly of recombinant human CD1 by using oxidative refolding chromatography AB - CD1 is an MHC class I-like antigen-presenting molecule consisting of a heavy chain and Pz-microglobulin light chain. The in vitro refolding of synthetic MHC class I molecules has always required the presence of ligand. We report here the use of a folding method using an immobilized chaperone fragment, a protein disulphide isomerase, and a peptidyl-prolyl cis-trans isomerase (oxidative refolding chromatography) for the fast and efficient assembly of ligand-free and ligand-associated CD1a and CD1b, starting with material synthesized in Escherichia coil. The results suggest that "empty" MHC class I-like molecules can assemble and remain stable at physiological temperatures in the absence of ligand, The use of oxidative refolding chromatography thus is extended to encompass complex multisubunit proteins and specifically to members of the extensive, functionally diverse and important immunoglobulin supergene family of proteins, including those for which a ligand has yet to be identified MH - United Kingdom MH - Mexico|Distrito Federal MH - Switzerland PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 22 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000167521300065 L2 - minichaperone;protein folding;GroEL;DsbA;PPI;T-CELL RECOGNITION; MAJOR HISTOCOMPATIBILITY COMPLEX; ANTIGEN PRESENTATION; MOUSE CD1; MOLECULAR CHAPERONES; SELF-GLYCOLIPIDS; CRYSTALLIZATION; EXPRESSION; BACTERIAL; DISEASE SO - Proceedings of the National Academy of Sciences of the United States of America 2001 ;98(6):3288-3293 2268 UI - 13062 AU - Aluja A AU - az-Fleischer F AU - Papaj DR AU - Lagunes G AU - Sivinski J AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoDGSV, SAGDR, Programa Moscamed Mexico, Campana Nacl Moscas Fruta, Tapachula 30700, Chiapas, MexicoUniv Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USACtr Med Agr & Vet Entomol, Gainesville, FL 32604, USAAluja, A, Inst Ecol AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Effects of age, diet, female density, and the host resource on egg load in Anastrepha ludens and Anastrepha obliqua (Diptera : Tephritidae) AB - Oocyte counts, used as a measure of egg load, were compared among three different age groups (15, 30 and 45 days) of two polyphagous species of tephritid fruit flies, Anastrepha ludens and Anastrepha obliqua, which were exposed to varying conditions of diet (sucrose vs sucrose and protein), availability of oviposition substrate (present vs absent), adult female density (1, 2 and 4 females/cage), and semiochemical context (presence vs absence of male pheromones and fruit volatiles). In both species, oocyte counts were higher in older females and for females fed sucrose and protein than for females fed sucrose only. The presence of artificial oviposition substrates influenced oocyte counts in A. obliqua, but not in A. ludens. Female density influenced oocyte counts in both species. Females maintained in groups had higher egg loads than isolated females. Finally, preliminary evidence suggests that semiochemical context influenced oocyte counts. Counts were highest for females in a room containing both fruit volatiles and male pheromone, lowest for females in a room containing neither volatiles nor pheromone, and intermediate for females in rooms containing either volatiles or pheromone but not both. Our results suggest that egg load is influenced by environmental factors in different ways in these two species. Egg load in A. obliqua, a species whose host fruits are highly ephemeral, is responsive to access to the host resource. By contrast, in A. ludens, a species infesting less ephemeral fruit, female density and age played a more important role than host stimuli. The role of ovarian maturation and oviposition in mediating these effects, as well as implications for mass rearing and pest management, are discussed. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Chiapas MH - Mexico|Veracruz MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Entomology;Physiology U5 - J;Article AV - English IS - 0022-1910 UR - ISI:000170432800004 L2 - Anastrepha;Tephritidae;oogenesis;nutrition;egg load;social facilitation;RHAGOLETIS-POMONELLA FLIES; DROSOPHILA-SILVESTRIS; OVIPOSITION BEHAVIOR; SERPENTINA DIPTERA; FRUIT-FLIES; FLY; ANTHOMYIIDAE; OOGENESIS; FECUNDITY; STIMULUS SO - Journal of Insect Physiology 2001 ;47(9):975-988 2269 UI - 11822 AU - Alvarado FD AU - Pineda M AU - Rutkowski JH AU - Wojtczak L AD - IPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Lodz, Dept Solid State Phys, PL-90236 Lodz, PolandAlvarado, FD, IPN, Escuela Super Fis & Matemat, Edif 9,UP ALM,Zacatenco, Mexico City 07738, DF, Mexico TI - Roughness influence on surface melting AB - The influence of surface roughness on surface melting phase transition is discussed within the molecular field theory. The roughness is characterized by the surface order parameter averaged over all the density fluctuations whose description corresponds to the discrete Gaussian solid-on-solid model. The potential governing the transition between the rough surface and the surface melting is considered in terms of the modified van der Waals equation of state. Its effective shape represents two intersecting parabolas with nonequal curvatures for the solid and liquid phases. The phase diagram shows the coexistence of two phases with rough and wet surfaces MH - Mexico|Distrito Federal MH - Poland PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000173718400001 L2 - MODEL; TRANSITION; ALUMINUM SO - Surface Review and Letters 2001 ;8(6):599-608 2270 UI - 13347 AU - Alvarado FLC AU - Machowski S AU - Urbaniak-Kucharczyk A AD - Univ Lodz, Chair Solid State Phys, PL-90236 Lodz, PolandInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City, DF, MexicoUrbaniak-Kucharczyk, A, Univ Lodz, Chair Solid State Phys, Ul Pomorska 149-153, PL-90236 Lodz, Poland TI - Localised modes of elementary excitations in the system of two ferromagnetic layers separated by a nonmagnetic spacer AB - The elementary excitations (spin waves) in the system of two ferromagnetic films of different thicknesses exchange coupled through a nonmagnetic metallic spacer are investigated. The Hamiltonian of the system consists of the exchange, Zeeman and both the surface and interface anisotropy terms. The oscillatory exchange coupling between two ferromagnetic layers resulting from the interaction via itinerant electrons is employed to investigate spin wave profiles. In presented contribution the discussion of the influence of the anisotropies at the external surfaces and at the interface is extended to the case of ferromagnetic layers of different thicknesses and interaction parameters. The solutions of a set of difference equations for the amplitudes and wave vector k lead to real (bulk modes) and imaginary (localised modes) solutions for k. The imaginary solutions represents, modes localised at surface or (and) interface. The conditions necessary for appearance of both types of modes are discussed. It is shown that that the coexistence of localisation at the surface and interface depends on the ratio of thicknesses of constituent layers. The results obtained as a function of the spacer thickness are illustrated by the ferromagnetic resonance (FM R) spectra. The examples of the systems in which one type of surface anisotropy decides on the character of resonance picture are presented. Analysis of the spectra allows one to estimate the experimental error connected with the thicknesses of magnetic and nonmagnetic layers in FMR experiments. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000169675600047 L2 - multilayers;surface;interface;localised states;SPIN-WAVE RESONANCE; MAGNETIC-PROPERTIES; THIN-FILMS; INTERFACE-MODE; SANDWICH STRUCTURES; BILAYER FILMS; EXCHANGE; SUPERLATTICES; MULTILAYERS; OSCILLATIONS SO - Vacuum 2001 ;63(1-2):323-329 2271 UI - 11846 AU - Alvarez A AU - Chacon O AU - Litvinchev IS AU - Rangel S AD - UANL, FIME, Nuevo Leon, MexicoRussian Acad Sci, Ctr Comp, Moscow 117967, RussiaUNESP, IBILCE, DCCE, Sao Jose Do Rio Preto, BrazilAlvarez, A, UANL, FIME, Nuevo Leon, Mexico TI - Aggregation in the generalized transportation problem AB - Aggregation disaggregation is used to reduce the analysis of a large generalized transportation problem to a smaller one. Bounds for the actual difference between the aggregated objective and the original optimal value are used to quantify the error due to aggregation and estimate the quality of the aggregation. The bounds can be calculated either before optimization of the aggregated problem (a priori) or after (a posteriori). Both types of the bounds are derived and numerically compared. A computational experiment was designed to (a) study the correlation between the bounds and the actual error and (b) quantify the difference of the error bounds from the actual error. The experiment shows a significant correlation between some a priori bounds, the a posteriori bounds and the actual error. These preliminary results indicate that calculating the a priori error bound is a useful strategy to select the appropriate aggregation level, since the a priori bound varies in the same way that the actual error does. After the aggregated problem has been selected and optimized, the a posteriori bound provides a good quantitative measure for the error due to aggregation MH - Brazil MH - Mexico|Nuevo Leon MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence;Computer Science, Cybernetics;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 1064-2307 UR - ISI:000173650300012 SO - Journal of Computer and Systems Sciences International 2001 ;40(6):923-929 2272 UI - 13901 AU - Alvarez F AU - Campos E AU - Hoeg J AU - O'Brien J AD - Natl Autonomous Univ Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoUniv Copenhagen, Inst Zool, Dept Zoomorphol, DK-2100 Copenhagen, DenmarkUniv S Alabama, Dept Biol Sci, Mobile, AL 36688, USAAlvarez, F, Natl Autonomous Univ Mexico, Inst Biol, Colecc Nacl Crustaceos, Apardado Postal 70-153, Mexico City 04510, DF, Mexico TI - Distribution and prevalence records of two parasitic barnacles (Crustacea : Cirripedia : Rhizocephala) from the west coast of North America AB - New records of rhizocephalan barnacles from the Mexican Pacific are presented. The distribution ranges of Lernaeodiscus porcellanae (Lernaeodiscidae) and Heterosaccus californicus (Sacculinidae) and their host species are revised. In both cases, the parasites occur in only a fraction of the total geographic range of their hosts. Lernaeodiscus porcellanae was found only in the porcellanid crab Petrolisthes cabrilloi from Laguna Beach, California to San Quintin, Baja California; while H. californicus ranged from Bodega Bay, California to Cedros Island Baja California parasitizing (fi om north to south) the majid crabs Pugettia producta, Loxorhynchus grandis, L. crispatus, and Taliepus nuttallii. Prevalence records are presented for Lernaeodiscus porellanae and for H. californicus parasitizing I? producta; in both cases considerable geographical and temporal variation was found MH - Denmark MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000168137300006 L2 - PORCELLANAE MULLER CRUSTACEA; CYPRIS SETTLEMENT; LIFE-CYCLE; REPRODUCTION SO - Bulletin of Marine Science 2001 ;68(2):233-241 2273 UI - 14276 AU - Alvarez J AU - Folch-Gabayet M AU - Perez-Esteva S AD - New Mexico State Univ, Dept Math, Las Cruces, NM 88003, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca 62251, Morelos, MexicoAlvarez, J, New Mexico State Univ, Dept Math, Las Cruces, NM 88003, USA TI - Banach spaces of solutions of the Helmholtz equation in the plane AB - The purpose of this article is to study the Hilbert space W-2 consisting of all solutions of the Helmholtz equation Deltau + u = 0 in R-2 that are the image under the Fourier transform of L-2 densities in the unit circle. We characterize this space as a close subspace of the Hilbert space H-2 of all functions belonging to L-2(\x\(-3)dx) jointly with their angular and radial derivatives, in the complement of the unit disk in R-2 We calculate the reproducing kernel of W2 and study its reproducing properties in the corresponding spaces H-p, for p > 1 MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CAMBRIDGE: BIRKHAUSER BOSTON INC RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1069-5869 UR - ISI:000167081600004 L2 - Helmholtz equation;reproducing kernel SO - Journal of Fourier Analysis and Applications 2001 ;7(1):49-62 2274 UI - 13352 AU - Alvarez L AU - Perez MD AU - Gonzalez JL AU - Navarro V AU - Villarreal ML AU - Olson JO AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoIMSS, Ctr Invest Biomed Sur, Xochitepec, Morelos, MexicoUniv Autonoma Estado Morelos, Ctr Invest Biotecnol, Cuernavaca, Morelos, MexicoAugustana Univ Coll, Camrose, AB, CanadaAlvarez, L, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - SC-1, an antimycotic spirostan saponin from Solanum chrysotrichum AB - A new antimycotic steroidal saponin named SC-1 has been isolated from the leaves of Solaum chrysotrichum by bioassay-guided fractionation. The structure of SC-1 was characterized as 3-O-[beta -quinovopyranosyl(1 -->)-beta -glucopyranosyl(1 -->6)-beta -lucopyranosyl]chlorogenin on the basis of spectral analyses and chemical evidence MH - Canada MH - Mexico|Morelos PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Letter AV - English IS - 0032-0943 UR - ISI:000169629300021 L2 - NMR-SPECTROSCOPY SO - Planta Medica 2001 ;67(4):372-374 2275 UI - 13800 AU - Alvarez L AU - Xiao M AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoAlvarez, L, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - On the coupling efficiency of metal-coated near-field probes AB - A theory for calculating the optical transmission of nanometric circular apertures in a thick and perfectly conducting screen coated upon an optical fibre has been developed. The theory is intended for the study of near-field probes and differs from other well known theories of radiation transmission through subwavelength apertures in the fact that it includes an optical fibre, making possible to distinguish which part of energy passing through the aperture is effectively coupled in guided modes. In a scanning near-field optical microscope tip, only the guided modes will reach the photodetector, and will contribute to the final readout. A numerical calculation for different fibre parameters, to show the dependence of the guided transmission coefficient for the guided modes of the fibre, is presented. The agreement of the theory with earlier calculations where the optical fibre is not included is emphasized MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Microscopy U5 - J;Article AV - English IS - 0022-2720 UR - ISI:000168379100012 L2 - guided modes;near-field probes;near-field theory;moment method;radiation modes;subwavelength aperture;CIRCULAR APERTURE SO - Journal of Microscopy-Oxford 2001 ;202():351-358 2276 UI - 14135 AU - Alvarez M AU - Llibre J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Autonoma Barcelona, Dept Matemat, E-08193 Barcelona, SpainAlvarez, M, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, AP 55-534, Mexico City 09340, DF, Mexico TI - Heteroclinic orbits and Bernoulli shift for the elliptic collision restricted three-body problem AB - We consider two mass points of masses m(1) = m(2) = 1/2 moving under Newton's law of gravitational attraction in a collision elliptic orbit while their centre of mass is at rest. A third mass point of mass m(3) approximate to 0, moves on the straight line L, perpendicular to the line of motion of the first two mass points and passing through their centre of mass. Since m(3) approximate to 0, the motion of the masses m(1) and m(2) is not affected by the third mass, and from the symmetry of the motion it is clear that m(3) will remain on the line L. So the three masses form an isosceles triangle whose size changes with the time. The elliptic collision restricted isosceles three-body problem consists in describing the motion of m(3). In this paper we show the existence of a Bernoulli shift as a subsystem of the Poincare map defined near a loop formed by two heteroclinic solutions associated with two periodic orbits at infinity. Symbolic dynamics techniques are used to show the existence of a large class of different motions for the infinitesimal body MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Interdisciplinary Applications;Mechanics U5 - J;Article AV - English IS - 0003-9527 UR - ISI:000167521800002 L2 - 3-BODY PROBLEM SO - Archive for Rational Mechanics and Analysis 2001 ;156(4):317-357 2277 UI - 12871 AU - Amero C AU - Golzarri JI AU - Izerrouken M AU - Espinosa G AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCtr Rech Nucl Draria, Algiers, AlgeriaEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Gd-148, U-238, Pu-239 and Cm-244 alpha particle energy analysis using tracks in solids AB - This paper presents advances in a procedure for alpha particle analysis using the nuclear tracks formed in solid-state materials. This method is based on the relationship between the energy deposited in the material by ionizing particles and the track developed after a well-established chemical process. The experimental study included alpha particles in the energy range from 3.2 to 5.8 MeV emitted by Gd-148, U-238, Pu-239 and Cm-244. The quantitative results provide a clear signature to identify each one of the radioisotopes based on the formed track parameters. The track analysis is performed with a digital image analysis system associated with a PC mathematical processor. The wide range energy response makes this method a promising analysis system. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Algeria MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000170916200069 L2 - isotope identification;nuclear tracks;CR-39;DETECTORS; CR-39 SO - Radiation Measurements 2001 ;34(1-6):341-343 2278 UI - 14221 AU - Amin MB AU - Moch H AU - varado-Cabrero I AU - Jimenez RE AU - Tamboli P AU - Peralta-Venturina M AU - Amin M AU - Lim SD AU - Mihatsch M AU - Stricker H AD - Emory Univ, Atlanta, GA 30322, USAUniv Basel, CH-4003 Basel, SwitzerlandSocial Secur Hosp, Colima, Mexico TI - Chromophobe renal cell carcinoma (CH-RCC): Histopathologic and prognostic features in 116 cases MH - Mexico|Colima MH - Switzerland MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000166622400586 SO - Modern Pathology 2001 ;14(1):100A-100A 2279 UI - 14269 AU - Amin MB AU - Moch H AU - varado-Cabrero I AU - Jimenez RE AU - Tamboli P AU - Peralta-Venturina M AU - Amin M AU - Lim SD AU - Mihatsch M AU - Stricker H AD - Emory Univ, Atlanta, GA 30322, USAUniv Basel, CH-4003 Basel, SwitzerlandSocial Secur Hosp, Colima, Mexico TI - Chromophobe renal cell carcinoma (CH-RCC): Histopathologic and prognostic features in 116 cases MH - Mexico|Colima MH - Switzerland MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000166634900592 SO - Laboratory Investigation 2001 ;81(1):100A-100A 2280 UI - 13625 AU - Ancona DAB AU - Guerrero LAC AU - Matos RIC AU - Ortiz GD AD - Univ Autonoma Yucatan, Fac Ing Quim, Merida, Yucatan, VenezuelaEscuela Nacl Ciencias Biol, Inst Politecn Nacl, Col St Tomas, Mexico City, DF, MexicoAncona, DAB, Univ Autonoma Yucatan, Fac Ing Quim, Av Juarez 421 Cd Ind,CP 97288,Apdo Postal 1226-A, Merida, Yucatan, Venezuela TI - Physicochemical and functional characterization of baby lima bean (Phaseolus lunatus) starch AB - One potential source of starch is the tropical legume baby lima bean (Phaseolus lunatus) that contains around 56-60% of starch. The objectives of this work were to evaluate this starch's physicochemical and functional properties and compare it with the properties of other starches. The chemical composition of lima bean starch was: 10.16% moisture, 0.20% protein, 0.67% fiber, 0.14% ash, 0.54% fat, 98.43% starch and 0.013% phosphorus. The amylose content was higher (32.7%) than that of other cereal and tuber starches but similar to other legume starches. The average granule size (diameter 17.9 mum) was comparable to that of corn starch and of other legume starches. The granule was heterogeneous, presenting an oval shape. The gelatinization temperature was 80.16 degreesC (range 75-87 degreesC), which is similar to other legume starches but higher than that of corn starch. The molecular size (alkali number 3.22), was smaller than that of potato starch but similar to that of corn starch. Compared to corn starch, the gels were firmer and presented a higher degree of retrogradation even at high concentrations. The water solubility was positively correlated with the temperature: i.e., 1.8, 3.4, 8.5 and 12.3% at 60, 70, 80 and 90 degreesC, respectively. The swelling power had the same behaviour: 2.6, 3.3, 12.8 and 19.9 g of water/per gram of starch at 60, 70, 80 and 90 degreesC, respectively. The amylogram showed that the viscosity (680 Brabender units) and stability were higher than those of commercial corn starch (252 Brabender units). The use of this starch in the preparation of syrups with high glucose contents, as well as in baked and canned products that require heating, is suggested MH - Mexico|Distrito Federal MH - Venezuela PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0038-9056 UR - ISI:000168763500004 L2 - lima bean starch;functional properties;physicochemical properties;CANAVALIA-ENSIFORMIS STARCH; RETROGRADATION; WHEAT; WATER SO - Starch-Starke 2001 ;53(5):219-226 2281 UI - 14312 AU - Andersen CY AU - Leonardsen L AU - Ulloa-Aguirre A AU - Barrios-de-Tomasi J AU - Kristensen KS AU - Byskov AG AD - Univ Copenhagen Hosp, Reprod Biol Lab, Juliane Marie Ctr Children Women & Reprod, DK-2100 Copenhagen, DenmarkHosp Ginecobstet Luis Castelazo Ayala, Res Unit Reprod Med, Inst Mexicano Seguro Social, Mexico City, DF, MexicoLeonardsen, L, Univ Copenhagen Hosp, Reprod Biol Lab, Juliane Marie Ctr Children Women & Reprod, Sect 5712,Blegdamsvej 9, DK-2100 Copenhagen, Denmark TI - Effect of different FSH isoforms on cyclic-AMP production by mouse cumulus-oocyte-complexes: a time course study AB - The ability of different isoforms of follicle stimulating hormone (FSH) to induce accumulation of cAMP in cultured mouse cumulus-oocyte-complexes (COC) was evaluated in a time course study. Using isoform fractions representing less acidic (pI 6,43-5.69), mid-acidic (pI 5.62-4.96) and acidic (pI 4.69-3.75) isoforms, the accumulation of cAMP was monitored after an exposure time of 0, 5, 10, 15, 30, 60, 120 and 180 min. In addition, cAMP production was monitored for 0, 5, 10, 15 and 30 min following a 5 min exposure to FSH isoform fractions, Based on FSH measurements using radioimmunoassays, the less and mid-acidic isoforms caused almost twice as much cAMP to be accumulated than the acidic isoform fraction, thereby confirming an enhanced biological activity of FSH isoforms with a isoelectric point (pI) of >5,0, For all isoform fractions, maximal accumulation of cAMP was achieved after 30 min of exposure, after which the production declined to background levels. After a 5 min exposure to isoform fractions, levels of cAMP were significantly higher in the less acidic isoform fractions, but after isoform removal, the decline in cAMP production to background levels followed a similar time course. The results demonstrate that FSH isoforms with a pi of >5.0 induced significant biological responses within a period of 30 min and that prolonged exposure caused attenuated signal transduction. The present results, set in the context of the pulsatile characteristics of FSH release from the pituitary and the reported half-life of less acidic isoforms of similar to 35 min, make it conceivable that isoforms with a pI >5.0 actually possess important physiological functions during the periovulatory period MH - Denmark MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 8 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1360-9947 UR - ISI:000166926300003 L2 - cAMP;cumulus-oocyte-complexes;FSH;isoforms;FOLLICLE-STIMULATING-HORMONE; IN-VITRO; BIOLOGICAL-ACTIVITY; MENSTRUAL-CYCLE; RECEPTOR; SERUM; CHARGE; CELLS; HETEROGENEITY; ANALOGS SO - Molecular Human Reproduction 2001 ;7(2):129-135 2282 UI - 13262 AU - Andersen SI AU - Hofsass T AU - Kleinitz W AU - Rahimian I AD - Tech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkGerman Petr Inst, D-38678 Clausthal Zellerfeld, GermanyPreussag Energie GmbH, D-49808 Lingen, GermanyAndersen, SI, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Organic precipitates in oil production of a Venezuelan oil field AB - A very light crude oil is being produced in an oil field in Venezuela. Such oils are susceptible to asphaltene precipitation as the reservoir pressure decreases during production. An asphaltene deposit has been found in the tubing of one of the wens and in the bottom sediment of the tanks on site. Dead oil samples from the well head of seven different producers in the field were analyzed by three different companies. The laboratory results covering the following aspects of different solvents show significant differences: asphaltene content, asphaltene/resin ratio, molecular mass of the precipitated asphaltenes, flocculation point, Vanadium/nickel ratio, precipitated asphaltenes, and the Hildebrand parameter. Using different consistency checks and establishing correlations among the results, the analysis of one lab is strongly favored against the others. The analytical results are discussed in detail, including the correlation between asphaltenes and the well situation regarding perforation depth and the phase behavior of the produced oil MH - Denmark MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Engineering, Chemical;Engineering, Petroleum U5 - J;Article AV - English IS - 1091-6466 UR - ISI:000169904200005 SO - Petroleum Science and Technology 2001 ;19(1-2):55-74 2283 UI - 13263 AU - Andersen SI AU - Lira-Galeana C AU - Stenby EH AD - Tech Univ Denmark, IVC SEP Dept Chem Engn, Engn Res Ctr, DK-2800 Lyngby, DenmarkInst Mexicano Petr, Mol Simulat Res Program, Mexico City 07730, DF, MexicoAndersen, SI, Tech Univ Denmark, IVC SEP Dept Chem Engn, Engn Res Ctr, Bldg 229, DK-2800 Lyngby, Denmark TI - On the mass balance of asphaltene precipitation AB - In the evaluation of experimental data as well as in calculation of phase equilibria the necessity of the application of mass balances is obvious. In the case of asphaltenes the colloidal nature of these compounds may highly affect the mass balance. In the present paper several experiments are performed in order to check the consistency of mass balances within asphaltene precipitation. Asphaltenes are precipitated in two step processes either by changing temperature or by changes in precipitant with increasing precipitation power. This has been performed for three different oils. The data indicates that in temperature experiments as well as in solvent series experiments the precipitation of heavy asphaltenes affects the following precipitation of lighter asphaltenes. In both cases the mass balance using standard separation techniques cannot be closed, as less material is precipitated in a two step process than in the direct process either at low temperature or by direct precipitation with one precipitant. The different fractions were subject to HPLC size exclusion chromtagraphy showing that the material remaining in solution in the stepwise process was of low molecular weight, and that the material in the second precipitation step was often of higher apparent molecular weight anti had an increased overall absorbance coefficient MH - Denmark MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Energy & Fuels;Engineering, Chemical;Engineering, Petroleum U5 - J;Article AV - English IS - 1091-6466 UR - ISI:000169904300016 SO - Petroleum Science and Technology 2001 ;19(3-4):457-467 2284 UI - 13295 AU - Anderson J AU - Adin A AU - Crook J AU - Davis C AU - Hultquist R AU - Jimenez-Cisneros B AU - Kennedy W AU - Sheikh B AU - van der Merwe B AD - Hebrew Univ Jerusalem, IL-91905 Jerusalem, IsraelBlack & Veatch, Boston, MA, USAPubl Util Commiss, San Francisco, CA, USADept Hlth Serv, Sacramento, CA, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoMontgomery Watson, San Diego, CA, USA TI - Climbing the ladder: a step by step approach to international guidelines for water recycling AB - Given the pressures on the world's freshwater resources. recycled water is a valuable resource. Recycled water can increase the reliability of water supply because it is an independent source of water. Water recycling requires effective measures to protect public health and the environment. In the absence of comprehensive international guidelines, different countries have developed different approaches to managing water recycling depending on the understanding of the health risks, their individual economic circumstances, and affordability. Approaches vary between high technology/high cost/low risk and low technology/low cost/controlled risk. Furthermore, differences occur between countries and within individual countries. Inconsistencies can often be traced to lack of a unified scientific position on health effects. These inconsistencies increase public concerns about health risks and may give rise to conservative controls on responses to water recycling projects that some countries may be unable to afford. In this paper, an international panel of authors discusses how the different water recycling approaches might be linked together into international water recycling guidelines. These guidelines would incorporate a uniform approach to assessing hazards and risks while providing flexibility for individual countries to vary requirements to suit local circumstances of affordability and risk. The authors propose a framework of guidelines in which individual countries can progressively improve recycled water quality as lower risk levels become more affordable. The authors argue that a uniform international approach will result in a number of benefits including a better focus on risk management, better targeted research and development efforts and greater public confidence in water recycling. The authors invite discussion on the concepts put forward in the paper MH - Israel MH - Mexico|Distrito Federal MH - USA PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000169725900002 L2 - guidelines;recycled water;regulations;wastewater;water quality;water recycling;water reuse SO - Water Science and Technology 2001 ;43(10):1-8 2285 UI - 14271 AU - Andresen E AD - Univ Florida, Dept Zool, Gainesville, FL 32611, USAAndresen, E, Univ Nacl Autonoma Mexico, Dept Ecol Recursos Nat, Apartado Postal 27-3, Merelia 58089, Michoacan, Mexico TI - Effects of dung presence, dung amount and secondary dispersal by dung beetles on the fate of Micropholis guyanensis (Sapotaceae) seeds in Central Amazonia AB - The study of seed fate is crucial for understanding fruit-frugivore interactions. One factor that can greatly influence the fate of seeds dispersed through mammal defecation, is the dung that accompanies the seeds. Dung attracts dung beetles and rodents; the former eat and bury dung, the latter feed on seeds. In this study the fate of Micropholis guyanensis subsp. guyanensis seeds surrounded by no dung and by 5, 10 and 25 g of howler monkey dung was followed until seedling establishment. The depths at which dung beetles bury the seeds were measured, and the effect of burial depth on seedling emergence was determined. Although initial seed fates differed among treatments, the same percentage of seedlings established from seeds without faecal material, and from seeds with 5, 10 and 25 g of dung. However, a significantly higher proportion of seedlings established from buried seeds when compared to seeds that remained on the surface. The percentage of seedlings establishing in a controlled germination experiment decreased significantly with increasing burial depth. The effect of dung beetle activity should be taken into consideration when assessing the role that mammal endozoochory plays on seed dispersal ecology of tropical plants. These results provide further evidence for the emerging realization that the study of secondary seed dispersal and post-dispersal events is crucial for a more complete understanding of plant regeneration MH - Mexico|Michoacan MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 26 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000166994400004 L2 - dung beetles;Micropholis;Sapotaceae;seed dispersal;seed fate;MONKEYS ALOUATTA-SENICULUS; TROPICAL RAIN-FOREST; FRENCH-GUIANA; PREDATION; TREE; SCARABAEIDAE; RECRUITMENT; FRUIT; GERMINATION; COLEOPTERA SO - Journal of Tropical Ecology 2001 ;17():61-78 2286 UI - 12592 AU - Angelova M AU - Dobrev VK AU - Frank A AD - Northumbria Univ, Sch Comp & Math, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, EnglandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Mexico City 04510, DF, MexicoBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, BulgariaAngelova, M, Northumbria Univ, Sch Comp & Math, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England TI - Simple applications of q-bosons AB - A deformation of the harmonic oscillator algebra associated with the Morse potential and the SU(2) algebra is derived using the quantum analogue of the anharmonic oscillator. We use the quantum oscillator algebra or q-boson algebra, which is a generalization of the Heisenberg-Weyl algebra obtained by introducing a deformation parameter q. Further, we present a new algebraic realization of the q-bosons, for the case of q being a root of unity, which corresponds to a periodic structure described by a finite-dimensional representation. We show that this structure represents the symmetry of a linear lattice with periodic boundary conditions MH - Bulgaria MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000171702300001 L2 - VIBRATIONAL-SPECTRA; OSCILLATOR; MOLECULES SO - Journal of Physics A-Mathematical and General 2001 ;34(37):L503-L509 2287 UI - 13166 AU - Anguita F AU - Verma SP AU - Marquez A AU - Vasconcelos F AU - Lopez I AU - Laurrieta A AD - Univ Complutense, Fac Ciencias Geol, E-28040 Madrid, SpainUNAM, Ctr Invest Energia, Termixco 62580, Morelos, MexicoINTA, Ctr Astrobiol, Torrejon Ardoz 28850, SpainAnguita, F, Univ Complutense, Fac Ciencias Geol, E-28040 Madrid, Spain TI - Circular features in the Trans-Mexican Volcanic Belt AB - One hundred and ninety-one circular or elliptical features have been located on Landsat imagery of the Trans-Mexican Volcanic Belt (TMVB). The origin of most of these features is unknown. Nine have been recognized as collapse calderas (clearly visible on Landsat imagery) and studied in detail, while an equally small number have been tentatively identified as such but not thoroughly investigated. On the basis of the identification of at least five of the nine calderas through their detection on Landsat images, it is proposed that the present inventory is a reliable base to extend the census of the TMVB confirmed calderas, now clearly too small for a population of roughly 8000 volcanic centers, many of which emitted large volumes of felsic pyroclastic products. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000170257500003 L2 - Mexico;calderas;remote sensing;Trans-Mexican Volcanic Belt;EXTENSION SO - Journal of Volcanology and Geothermal Research 2001 ;107(4):265-274 2288 UI - 12727 AU - Anikiev VV AU - Botsul AI AU - Dudarev OV AU - Kolesov GM AU - Sapozhnikov DY AU - Shumilin EN AD - Natl Comm Ecol Secur, Moscow 101000, RussiaRussian Acad Sci, Far E Div, Pacific Inst Oceanol, Vladivostok 690041, RussiaRussian Acad Sci, VI Vernadskii Inst Geochem & Analyt Chem, Moscow 117975, RussiaInterdisciplinary Marine Sci Ctr, La Paz 23000, Baja California, MexicoAnikiev, VV, Natl Comm Ecol Secur, Ul M Lubyanka 10, Moscow 101000, Russia TI - Distribution, fractionation, and fluxes of the rare-earth elements in the suspended matter-bottom sediment system in the Mekong and Saigon river estuaries, South China Sea AB - The contents of the rare-earth elements and their distribution in the suspended matter-bottom sediment system within the estuaries of the Mekong and Saigon rivers (South China Sea) were studied using neutron activation analysis, The data obtained are used to estimate the fractionation coefficients and the sedimentary fluxes of the rare-earth elements in different parts of the area studied. By means of a comparative analysis, the natural processes controlling the behavior of the rare-earth elements in the estuaries of the Mekong and Saigon rivers (South China Sea) are determined MH - Mexico|Baja California MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-7029 UR - ISI:000171359500007 L2 - PARTICULATE MATTER SO - Geochemistry International 2001 ;39(9):897-907 2289 UI - 12230 AU - Anjos JC AU - Magnin J AU - Herrera G AD - Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoAnjos, JC, Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier SiRua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil TI - On the intrinsic charm and the recombination mechanisms in charm hadron production AB - We study Lambda (+/-)(c) production in pN and pi N- interactions. Recent experimental data from the SELEX and E791 Collaborations at FNAL provide important information on the production mechanism of charm hadrons. In particular, the production of the Lambda (c) baryon provides a good test of the intrinsic charm and the recombination mechanisms, which have been proposed to explain the so-called leading particle effects. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172607200005 L2 - PRODUCTION ASYMMETRIES; NUCLEUS INTERACTIONS; COLLISIONS; DISTRIBUTIONS; MODEL SO - Physics Letters B 2001 ;523(1-2):29-34 2290 UI - 13188 AU - Antoniou IE AU - Gadella M AU - Hernandez E AU - Jauregui A AU - Melnikov Y AU - Mondragon A AU - Pronko GP AD - Int Solvay Inst Phys & Chem, B-1050 Brussels, BelgiumFree Univ Brussels, Brussels, BelgiumFac Ciencias, Dept Fis Teor, E-47011 Valladolid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Sonora, Dept Fis, Mexico City, DF, MexicoSt Petersburg State Univ, Lab Complex Syst Theory, St Petersburg 198904, RussiaProtvino High Energy Phys Inst, Protvino 142284, Moscow Region, RussiaAntoniou, IE, Int Solvay Inst Phys & Chem, CP 231,Campus Plaine ULB,Bd Triomphe, B-1050 Brussels, Belgium TI - Gamow vectors for barrier wells AB - We study four examples of Gamow vectors in one-dimensional potential barriers, namely square barriers and delta barriers. We show that resonances appear when the potential has at least two relative maxima and investigate the emergence of double resonances given rise to Gamow-Jordan vectors as well. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Belgium MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000170145000014 L2 - ELECTRON-ATOM SCATTERING; S-MATRIX; DOUBLE POLES; RESONANT STATE; DEGENERACY; PHASE SO - Chaos Solitons & Fractals 2001 ;12(14-15):2719-2736 2291 UI - 12454 AU - Aparicio JM AU - Barrientos MP AU - Hurtado ML AU - Molina B AU - Frias S AU - Salinas CF AD - Hosp Nino Poblano, Dept Genet, Puebla, MexicoInst Nacl Pediat, Dept Cytogenet, Mexico City, DF, MexicoMed Univ S Carolina, Charleston, SC 29425, USA TI - Reciprocal translocation 46,XY, t(1;4)(q11;q11), in a gigantiform cementoma. A case report MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648900331 SO - American Journal of Human Genetics 2001 ;69(4):240-240 2292 UI - 8799 AU - Applebaum SL AU - Perez R AU - Lazo JP AU - Holt GJ AD - Univ Texas, Inst Marine Sci, Port Aransas, TX 78373, USACICESE, Dept Acuicultura, Ensenada 22860, Baja California, MexicoHolt, GJ, Univ Texas, Inst Marine Sci, 750 Channelview Dr, Port Aransas, TX 78373 USA TI - Characterization of chymotrypsin activity during early ontogeny of larval red drum (Sciaenops ocellatus) AB - The temporal evolution of chymotrypsin activity during early ontogeny of laboratory reared red drum larvae was accomplished using a combination of biochemical assays and electrophoretic methods ( substrate SDS-PAGE). Optimal functional conditions for chymotrypsin were also determined. Chymotrypsin activity was first detected prior to the onset of exogenous feeding. Total chymotrypsin activity increased with age and standard length. Specific activity was greatest on day 10 post-hatch. Maximal chymotrypsin activity was observed at 50degreesC, pH 7.8, and Ca2+ concentration of 25 mM. Using substrate gel electrophoresis and specific inhibitors the molecular weight of red drum chymotrypsin was estimated to be 26-27 kD. Our results indicate that the digestive system of red drum larvae is capable of alkaline proteolysis before first feeding and suggest that chymotrypsin may have potential as an indicator of nutritional condition MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Fisheries;Physiology U5 - J;Article AV - English IS - 0920-1742 UR - ISI:000182135500005 L2 - alkaline protease;digestive enzymes;fish larvae;SDS-PAGE;DIGESTIVE ENZYME-ACTIVITIES; CATFISH CLARIAS-GARIEPINUS; SEABREAM SPARUS-AURATA; YOLK-SAC LARVAE; FISH LARVAE; NUTRITIONAL CONDITION; KINETIC-PROPERTIES; PROTEASES; TRACT SO - Fish Physiology and Biochemistry 2001 ;25(4):291-300 2293 UI - 12608 AU - Aramburo C AU - Carranza M AU - Reyes M AU - Luna M AU - Martinez-Coria H AU - Berumen L AU - Scanes CG AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro, Qro, MexicoRutgers State Univ, Dept Anim Sci, New Brunswick, NJ 08903, USAAramburo, C, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus UNAM-UAQ Juriquilla, Queretaro, Qro, Mexico TI - Characterization of a bioactive 15 kDa fragment produced by proteolytic cleavage of chicken growth hormone AB - There is evidence for a cleaved form of GH in the chicken pituitary gland. A 25 kDa band of immunoreactive-(ir-)GH, as well as the 22 kDa monomeric form and some oligomeric forms were observed when purified GH or fresh pituitary extract were subjected to SIDS-PAGE under nonreducing conditions. Under reducing conditions, the 25 kDa ir-GH was no longer observed, being replaced by a 15 kDa band, consistent with reduction of the disulfide bridges of the cleaved form. The type of protease involved was investigated using exogenous proteases and monomeric cGH. Cleaved forms of chicken GH were generated by thrombin or collagenase. The site of cleavage was found in position Arg(133)-Gly(134) as revealed by sequencing the fragments produced. The NH2-terminal sequence of 40 amino acid residues in the 15 kDa form was identical to that of the rcGH and analysis of the remaining 7 kDa fragment showed an exact identity with positions 134-140 of cGH structure. The thrombin cleaved GH and the 15 kDa form showed reduced activity (0.8% and 0.5% of GH, respectively) in a radioreceptor assay employing a chicken liver membrane preparation. However, this fragment had a clear bioactivity in an angiogenic bioassay and was capable to inhibit the activity of deiodinase type III in the chicken liver MH - Mexico|Queretaro MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0969-711X UR - ISI:000171653400014 L2 - growth hormone;proteolytic cleavage;biological activities of GH variants;CAPILLARY ENDOTHELIAL-CELLS; HUMAN-PROLACTIN; RAT PROLACTIN; IN-VITRO; NONGLYCOSYLATED FORMS; DEIODINASE ACTIVITIES; BIOLOGICAL-ACTIVITY; 16K FRAGMENT; PITUITARY; PURIFICATION SO - Endocrine 2001 ;15(2):231-240 2294 UI - 11961 AU - Arana R AU - Montiel CL AU - Sanchez E AU - Ignacio G AU - Delgado LJ AU - Baltasar S AU - Vega P AU - Castro MA AU - Duque J AU - Jimenez R AU - Lobato R AU - Martinez MA AU - Rubio-Borja ME AD - CMN, Leon, SpainCMN, Puebla, Mexico TI - Correlation of clinical outcome and prognostic factors in a group of acute de novo myeloblastic leukemia patients MH - Mexico|Puebla MH - Spain PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000172134200955 SO - Blood 2001 ;98(11):208B-208B 2295 UI - 14406 AU - Araujo O AU - Giudici R AU - Saldivar E AU - Ray WH AD - GIRSA Corp SA CV, CID, Lerma 52000, Edo De Mexico, MexicoRhodia SA, Dept Proc, Usina Quim Paulinia, BR-13140000 Santo Andre, SP, BrazilUniv Sao Paulo, Escola Politecn, Dept Engn Quim, BR-05424970 Sao Paulo, BrazilUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USASaldivar, E, GIRSA Corp SA CV, CID, Lerma 52000, Edo De Mexico, Mexico TI - Modeling and experimental studies of emulsion copolymerization systems. I. Experimental results AB - A systematic experimental and modeling study of several emulsion copolymerization systems has been performed, and will be reported in a series of papers. Ten binary and three ternary copolymerizations involving styrene, methyl methacrylate, butyl acrylate, butadiene, vinyl acetate, acrylic acid, and ethylene were studied varying polymerization temperature, monomer composition, water to monomer ratio, initiator and emulsifier concentrations. Conversion, particle size, copolymer composition, and gel content were measured at several reaction times. The goal of this series of papers is to assess our quantitative understanding of emulsion copolymerization expressed in the form of a comprehensive mathematical model applied to monomers widely used in industry. In this first paper of the series, a global comparison of the experimental results is made. It is observed that the gel content is higher in systems containing butyl acrylate and butadiene, and smaller in systems containing methyl methacrylate. Larger particle numbers are obtained for lattices containing acrylic acid and butadiene. It is also shown that, for most of the systems, integration of the simple Mayo-Lewis equation is adequate to explain the drift in copolymer composition observed experimentally. (C) 2001 John Wiley & Sons, Inc MH - Brazil MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 20 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000166698200007 L2 - emulsion copolymerization;mathematical modeling;experimental;FREE-RADICAL COPOLYMERIZATION; METHYL-METHACRYLATE; VINYL-ACETATE; POLYMERIZATION; KINETICS; PROPAGATION; TERMINATION; REACTOR SO - Journal of Applied Polymer Science 2001 ;79(13):2360-2379 2296 UI - 13507 AU - Archibald EN AU - Dunlop JS AU - Hughes DH AU - Rawlings S AU - Eales SA AU - Ivison RJ AD - Joint Astron Ctr, Hilo, HI 96720, USAUniv Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandINAOE, Puebla 72000, MexicoUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandUniv Wales, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, WalesUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandArchibald, EN, Joint Astron Ctr, 660 N Aohoku Pl,Univ Pk, Hilo, HI 96720 USA TI - A submillimetre survey of the star formation history of radio galaxies AB - We present the results of the first major systematic submillimetre survey of radio galaxies spanning the redshift range 1 < z < 5. The primary aim of this work is to elucidate the star formation history of this sub class of elliptical galaxies by tracing the cosmological evolution of dust mass. Using SCUBA on the JCMT, we have obtained 850-mum photometry of 47 radio galaxies to a consistent rms depth of 1 mJy, and have detected dust emission in 14 cases. The radio galaxy targets have been selected from a series of low-frequency radio surveys of increasing depth (3CRR, 6CE, etc.), in order to allow us to separate the effects of increasing redshift and increasing radio power on submillimetre luminosity, Although the dynamic range of our study is inevitably small, we find clear evidence that the typical submillimetre luminosity (and hence dust mass) of a powerful radio galaxy is a strongly increasing function of redshift; the detection rate rises from similar or equal to 15 per cent at z < 2.5 to 75 per cent at z > 2.5, and the average submillimetre luminosity rises at a rate cc (1 + z)(3) out to z similar or equal to 4. Moreover, our extensive sample allows us to argue that this behaviour is not driven by underlying correlations with other radio galaxy properties such as radio power, radio spectral index, or radio source size/age. Although radio selection may introduce other more subtle biases, the redshift distribution of our detected objects is in fact consistent with the most recent estimates of the redshift distribution of comparably bright submillimetre sources discovered in blank field surveys. The evolution of submillimetre luminosity found here for radio galaxies may thus be representative of massive ellipticals in general MH - USA MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 93 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0035-8711 UR - ISI:000169229600021 L2 - stars : formation;dust, extinction;galaxies : active;galaxies : elliptical and lenticular, cD;galaxies : formation;submillimetre;HIGH-RESOLUTION OBSERVATIONS; HIGH-REDSHIFT; 6C SURVEY; OPTICAL IDENTIFICATIONS; ZONE 30-DEGREES-LESS-THAN-DELTA-LESS-THAN-51-DEGREES; STATISTICAL-METHODS; ASTRONOMICAL DATA; DISTANT GALAXIES; VLA OBSERVATIONS; SOURCE COUNTS SO - Monthly Notices of the Royal Astronomical Society 2001 ;323(2):417-444 2297 UI - 14078 AU - arcon-Segovia D AU - Drenkard C AU - Villa AR AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Clin Epidemiol Unit, Mexico City 14000, DF, MexicoUniv Nacl Cordoba, Fac Ciencias Med, Unit Internal Med, Dept Rheumatol, RA-5000 Cordoba, ArgentinaAlarcon-Segovia, D, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, Mexico TI - Survival of Mexican patients with systemic lupus erythematosus MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Letter AV - English IS - 1462-0324 UR - ISI:000167514400021 SO - Rheumatology 2001 ;40(2):228-228 2298 UI - 14101 AU - arcon-Segovia D AU - Shoenfeld Y AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoTel Aviv Univ, Sackler Fac Med, IL-69978 Tel Aviv, IsraelAlarcon-Segovia, D, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, Mexico TI - Mexico-Israel Symposium - (February 15-16, 2001 Mexico City) MH - Israel MH - Mexico|Distrito Federal PB - RAMAT GAN: ISRAEL MEDICAL ASSOC JOURNAL RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Editorial Material AV - English IS - 1565-1088 UR - ISI:000167509300002 SO - Israel Medical Association Journal 2001 ;3(2):84-84 2299 UI - 13665 AU - Ardiles L AU - Figueroa CD AU - Ehrenfeld P AU - Quiroz Y AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AU - Mezzano S AD - Univ Austral Chile, Dept Nephrol, Valdivia, ChileUniv Austral Chile, Inst Histol & Pathol, Valdivia, ChileUniv Hosp, Maracaibo, VenezuelaINC, Mexico City, DF, Mexico TI - Renal kallikrein-kinin system (KK) compromise in a 5/6 renal ablation model modulated by mycophenolate mofetil (MMF) MH - Chile MH - Mexico|Distrito Federal MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0194-911X UR - ISI:000167748000038 SO - Hypertension 2001 ;37(3):988-988 2300 UI - 13003 AU - Aretxaga I AU - Terlevich E AU - Terlevich RJ AU - Cotter G AU - Diaz AI AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Cambridge, Cavendish Lab, Cambridge CB3 0HE, EnglandUniv Autonoma Madrid, Dept Fis Teor C11, Madrid, SpainAretxaga, I, Inst Nacl Astrofis Opt & Elect, Apdo Postal 25 & 216, Puebla 72000, Mexico TI - Stellar populations in the nuclear regions of nearby radio galaxies AB - We present optical spectra of the nuclei of seven luminous (P-178MHz greater than or similar to 10(25) W Hz(-1) Sr-1) nearby (z < 0.08) radio galaxies, which mostly correspond to the FR II class. In two cases, Hydra A and 3C 285, the Balmer and 4000-Angstrom break indices constrain the spectral types and luminosity classes of the stars involved, revealing that the blue spectra are dominated by blue supergiant and/or giant stars. The ages derived for the last burst of star formation in Hydra A are between 7 and 40 Myr, and in 3C 285 about 10 Myr. The rest of the narrow-line radio galaxies (four) have a lambda 4000-Angstrom break and metallic indices consistent with those of elliptical galaxies. The only broad-line radio galaxy in our sample, 3C 382, has a strong featureless blue continuum and broad emission lines that dilute the underlying blue stellar spectra. We are able to detect the Ca II triplet in absorption in the seven objects, with good quality data for only four of them. The strengths of the absorptions are similar to those found in normal elliptical galaxies, but these values are consistent both with stellar populations of roughly similar ages (as derived from the Balmer absorption and break strengths) and with mixed young+old populations MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000170568100021 L2 - galaxies : active;galaxies : starburst;galaxies : stellar content;ACTIVE GALACTIC NUCLEI; STAR-FORMATION HISTORY; EMISSION-LINE NEBULAE; HIGH-RESOLUTION MAPS; M-CIRCLE-DOT; HYDRA-A; SEYFERT-GALAXIES; STRENGTH INDEXES; COMPLETE SAMPLE; COOLING FLOWS SO - Monthly Notices of the Royal Astronomical Society 2001 ;325(2):636-648 2301 UI - 13296 AU - Arevalo D AU - Charatonik WJ AU - Covarrubias PP AU - Simon L AD - Univ Missouri, Dept Math & Stat, Rolla, MO 65409, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Wroclaw, Inst Math, PL-50384 Wroclaw, PolandCharatonik, WJ, Univ Missouri, Dept Math & Stat, Rolla, MO 65409, USA TI - Dendrites with a closed set of end points AB - Dendrites with a closed set of end points are investigated. It is shown that such dendrites are precisely those that do not contain two particular ones. A universal dendrite with a closed set of end points is constructed (also with ramification points of a given order), Open and monotone images of the considered dendrites are studied. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000169791400001 L2 - dendrite;end points;monotone;open SO - Topology and Its Applications 2001 ;115(1):1-17 2302 UI - 13026 AU - Argiro S AU - Camin DV AU - Cattaneo P AU - Cuautle M AU - Destro M AU - Facal P AU - Gariboldi R AU - Grassi V AU - Lapolla M AU - Manfredi P AU - Menichetti E AU - Privitera P AU - Ratti L AU - Re V AU - Speziali V AU - Trapani P AU - Tusi E AD - Univ Turin, Dept Phys, I-10125 Turin, ItalyUniv Milan, I-20122 Milan, ItalyIst Nazl Fis Nucl, Sez Torino, Turin, ItalyUniv Autonoma Puebla, Puebla, MexicoUniv Roma Tor Vergata, Rome, ItalyUniv Santiago de Compostela, Santiago De Compostela, SpainUniv Pavia, I-27100 Pavia, ItalyUniv Bergamo, Bergamo, ItalyArgiro, S, Univ Turin, Dept Phys, I-10125 Turin, Italy TI - The analog signal processing system for the Auger fluorescence detector prototype AB - The fluorescence detector of the Pierre Auger Cosmic Ray Observatory will provide a measurement of the parameters of extended air showers in the range from 10(19) to 10(21) eV. An array of 20 X 22 photomultiplier tubes (PMTs) is placed at the focal surface of a large-aperture telescope thus forming one of the 30 detector modules. The shape of the signal generated by each PMT is variable, depending mostly on the geometry of the air shower as seen by the detector; after analog processing the waveforms will be sampled at a rate of 10 MHz with 12-bit resolution. We have developed an analog signal processor to achieve the best compromise between energy and time resolution, low noise, and low cost. The head electronics provides an active bias network for the PMTs, which keeps the gain constant even in the presence of large dc background light from the night sky. This de level is measured by means of a built-in optocoupled linear circuit. The pulse signal is sent through a twisted pair to the analog front-end board. At this stage a compression of the 15-bit dynamic range of the signal into the 12-bit range of the FADC is performed. Antialiasing is provided ky a Bessel filter MH - Italy MH - Mexico|Puebla MH - Spain PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Nuclear Science & Technology U5 - J;Article AV - English IS - 0018-9499 UR - ISI:000170576200042 L2 - analog signal processing;fluoresecence detectors;ultra high energy cosmic rays SO - Ieee Transactions on Nuclear Science 2001 ;48(3):444-449 2303 UI - 12423 AU - Arias O AU - Dominguez C AU - Lastres A AU - Perez L AU - Otazo-Sanchez E AD - IMRE UH, Havana 10400, CubaCSIC, CNM, Barcelona 08193, SpainISPJAE, CIME, Havana 10800, CubaInst Tecnol Toluca, Metepec 52140, Edo Mexico, MexicoUniv Autonoma Estado de Hidalgo, Ctr Invest Quim, Hidalgo, MexicoArias, O, IMRE UH, Havana 10400, Cuba TI - Lead ion selective chemfet based on a new synthetic ionophore AB - Lead Ion Selective Chemical Modified Field Effect Transistor (CHEMFET) devices, based on plasticized membranes with 1-furoyl-3-phenylthiourea as a new synthetic ionophore for lead, have been developed. Silicon nitride/silicon oxide gate dielectric (20 x 500 mum) Ion Selective Field Effect Transistor (ISFETs) were used as the solid state transductor and have been fabricated using a low cost NMOS compatible CMOS technology. 1-furoyl-3- phenylthiourea has been previously tested as a new synthetic ionophore for lead in plasticised membrane for ISE configuration. Chemical characterization of the CHEMFET devices show that they have a Nernstian response with a linear range over three decades of lead activity. The slope of the electrode response was 33.4 mV/decade.. The interference results are according with other reports done by different authors. The response time is about 5 sec. The CHEMFET minimum lifetime is four weeks MH - Cuba MH - Mexico|Estado De Mexico MH - Mexico|Hidalgo MH - Spain PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0001-9704 UR - ISI:000172209600008 L2 - lead (II);CHEMFET;potentiometric sensor;MEMBRANE-ELECTRODE; NEUTRAL CARRIER SO - Afinidad 2001 ;58(495):363-366 2304 UI - 13453 AU - Arizmendi CM AU - Family F AU - Salas-Brito AL AD - Emory Univ, Dept Phys, Atlanta, GA 30322, USAUniv Mar del Plata, Fac Ingn, Dept Fis, RA-7600 Mar Del Plata, ArgentinaUniv Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Lab Sistemas Dinam, Coyoacan 04000, DF, MexicoArizmendi, CM, Emory Univ, Dept Phys, Atlanta, GA 30322, USA TI - Quenched disorder effects on deterministic inertia ratchets AB - The effect of quenched disorder on the underdamped motion of a periodically driven particle on a ratchet potential is studied. As a consequence of disorder, current reversal and chaotic diffusion may take place on regular trajectories. On the other hand, on some chaotic trajectories disorder induces regular motion. A localization effect similar to the Golosov phenomenon sets in whenever a disorder threshold that depends on the mass of the particle is reached. Possible applications of the localization phenomenon are discussed MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169285000009 L2 - CHAOTIC TRANSPORT; FRICTION; MOTION; NOISE; MACROMOLECULES; SEPARATION; POTENTIALS; DIFFUSION; PARTICLES; ARRAYS SO - Physical Review e 2001 ;63(6):art-061104 2305 UI - 13264 AU - Arizmendi N AU - Yepez-Mulia L AU - Cedillo-Rivera R AU - Ortega-Pierres MG AU - Munoz O AU - Befus D AU - Enciso-Moreno JA AD - IMSS, CMN Siglo XXI, UIMEIP Pediat, Mexico City, DF, MexicoIPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City, DF, MexicoUniv Alberta, PCBRG, Edmonton, AB T6G 2M7, CanadaYepez-Mulia, L, IMSS, CMN Siglo XXI, UIMEIP Pediat, Mexico City, DF, Mexico TI - Interleukin mRNA changes in mast cells stimulated by TSL-1 antigens AB - In this work we analyzed by RT-PCR, the mRNA changes for IL-4, IL-10, TNF and IFN ( induced by TSL-1 antigens in a rat mast cell line (HRMC) with mucosal characteristics. The data obtained showed an increase of 65 and 52 % in mRNA expression for IL-4 and TNF respectively and a decrease of 59 and 55 % in mRNAs for IFN gamma and IL-10. Our results suggest that TSI-I antigens induce the release from MC of regulatory molecules, such as IL-4 by an IgE independent mechanism. Our data also provides important information related to the ability of MC to participate not only in the effector phase against the infectious agents, but also in the orchestration of the immune response by the host against parasites MH - Canada MH - Mexico|Distrito Federal PB - ISSY MOULINEAUX: PRINCEPS EDITIONS RP - NOT IN FILE U3 - TC 4 U4 - Parasitology U5 - J;Article AV - English IS - 1252-607X UR - ISI:000169917100035 L2 - mast cell;activation;TSL-1 antigens;RT-PCR;Trichinella spiralis;TRICHINELLA-SPIRALIS SO - Parasite-Journal de la Societe Francaise de Parasitologie 2001 ;8(2):S114-S116 2306 UI - 13810 AU - Armanta MGM AU - Reyes-Serrato A AD - UNAM, Ctr Ciencias Mat Condensada, San Ysidro, CA 92143, USAInst Cient & Educ Super Ensenada, Programa Posgrado Fis Mat Ctr, Ensenada, Baja California, MexicoUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoArmanta, MGM, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Direct wide band gap material: a Hartree-Fock study of alpha-Be3N2 AB - The ground state electronic structure of the beryllium nitride alpha phase has been investigated using the all-electron ab initio periodic Hartree Fock(HF) approach, with a posteriori density-functional (DFT) correlation corrections. The computed HF lattice constant (8. 144 Angstrom) agrees with experiment (8.145 Angstrom) and the calculations predict a bulk modulus of 2.52 Mbar and cohesive energy of 1.24 a.u./formula unit. The band gap is found to be direct of 4.43 eV at the Gamma point, including corrections with DFT. This material might have application in the area of optoelectronics. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0256 UR - ISI:000168371000010 L2 - ab initio;Hartree Fock theory;electronic structure;wide band gap;beryllium nitride;direct band gap;nitride;LCAO;III-V NITRIDE; APPROXIMATION; EXCHANGE; DEVICES; ENERGY SO - Computational Materials Science 2001 ;21(1):95-100 2307 UI - 12622 AU - Armaroli T AU - Bevilacqua M AU - Trombetta M AU - Alejandre AG AU - Ramirez J AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyUniv Nacl Autonoma Mexico, Fac Quim, UNICAT, Depto Ingn Quim, Mexico City 04510, DF, MexicoBusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, Ple JF Kennedy, I-16129 Genoa, Italy TI - An FT-IR study of the adsorption of aromatic hydrocarbons and of 2,6-lutidine on H-FER and H-ZSM-5 zeolites AB - The interaction of aromatic hydrocarbons benzene, toluene, o-, m- and p-xylene and of methyl pyridines (in particular 2,6-lutidine) with H-ZSM-5 and H-FER zeolites has been studied. Two different H-ZSM-5 samples with strongly different intensity ratios between the two main OH stretching bands have been used. Benzene, toluene and p-xylene enter easily the cavities and give rise to three different H-bonded complexes. Two of them are strongly bonded while the third is likely a very hindered and distorted one. o-Xylene enters slowly the cavities and m-xylene even more slowly. Faster diffusion occurs at higher temperatures. On the contrary, xylenes do not enter the FER cavities. In spite of its steric hindrance, supposed to be the same of nt-xylene, 2,6-lutidine enters fast the ZSM channels and is protonated by the internal sites. On the contrary, it does not enter the FER cavities, but it is protonated too on the external silanols sites. Evidence is provided for some kind of heterogeneity of the internal sites of ZSM-5 zeolite. Additionally, it is concluded that other effects besides the molecular sieving effect may play a role in the access and diffusion of molecules into the zeolite channels. (C) 2001 Elsevier Science BN. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000171614000019 L2 - lutidine;m-xylene;ferrierite;ZSM-5;FT-IR;SKELETAL ISOMERIZATION; SURFACE-ACIDITY; FERRIERITE; CATALYSTS; SYSTEM; SITES; AL SO - Applied Catalysis A-General 2001 ;220(1-2):181-190 2308 UI - 13344 AU - Armaroli T AU - Bevilacqua M AU - Trombetta M AU - Milella F AU - Alejandre AG AU - Ramirez J AU - Notari B AU - Willey RJ AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyNatl Autonomous Univ Mexico, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, MexicoNotari Tecnol SnC, I-20097 San Donato Milanese, ItalyNortheastern Univ, Dept Chem Engn, Boston, MA 02115, USABusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, Ple JF Kennedy, I-16129 Genoa, Italy TI - A study of the external and internal sites of MFI-type zeolitic materials through the FT-IR investigation of the adsorption of nitriles AB - The adsorption of acetonitrile (AN) and pivalonitrile (2,2-dimethylpropionitrile, PN) has been investigated on pure silicalite S1, on a ZSM5 zeolite apparently free from extraframework material and another ZSM5 zeolite apparently rich in extraframework material, on a titanium silicalite TS1 and on a boralite sample. AN enters the cavities of MFI type structures and interacts with both internal and external acid sites while PN does not enter such cavities and only interacts with the external sites. Terminal silanols, whose acidity can vary from weak to medium, are present in all cases mostly at the external surface, while very acidic bridging Si-OH-Al sites of ZSM5 zeolite are apparently exclusively located at the internal channel surface. Lewis acidic Ti cations are evident both in the internal and on the external surface of TS1, Weakly acidic BOH sites of boralite are distributed among internal and external surface. Extraframework alumina like species of ZSM5 zeolite are apparently located in the internal cavities, Terminal silanols and hydrolized defects are located mostly at the external surface of silicalite. The mechanism of incorporation and charge balance of boron atoms as well as the structure of the hydroxy groups of boralite are still not well established. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000169790100007 L2 - MFI-type zeolite;nitrile;external surface;channel surface;acidity;FT-IR spectroscopy;SURFACE-ACIDITY; SILICA; ZSM-5; SPECTROSCOPY; FERRIERITE; BORALITES; AL SO - Applied Catalysis A-General 2001 ;216(1-2):59-71 2309 UI - 13449 AU - Armas B AU - Sibieude F AU - Mazel A AU - Fourmeaux R AU - Herrera MD AD - CNRS, Inst Sci & Genie Mat & Proc, F-66125 Font Romeu, FranceCNRS, Ctr Elaborat Mat & Etud Struct, F-31055 Toulouse, FranceUNAM, Inst Fis, Queretaro 1010, MexicoArmas, B, CNRS, Inst Sci & Genie Mat & Proc, BP 5 Odeillo, F-66125 Font Romeu, France TI - Low-pressure chemical vapour deposition of mullite layers using a cold-wall reactor AB - Mullite coatings (3Al(2)O(3)-2SiO(2)) were obtained in a cold wall reactor using aluminium trichloride, silicon tetrachloride and nitrous oxide as precursors with nitrogen and hydrogen as carrier gases. The experimental preparation conditions were studied for fixed flow rates of N2O, H-2 and N-2, substrate temperature T = 1200 degreesC, total chamber gas pressure P = 20 hPa, as a function of the AlCl3 to SiCl4 input ratio. The chemical composition, crystal structure and morphology of the coatings were determined by means of EDS, XRD and SEM. The aluminium content of the deposits increased, as expected, with the AlCl3 to SiCl4 input ratio. Thin specimens were also characterised by means of TEM. The local composition was determined by EELS, while the crystalline microstructure by electron diffraction. The best experimental parameters to produce mullite layers were then established. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Queretaro PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000169277300012 L2 - mullite;cold-wall reactor;low-pressure chemical vapour deposition;chlorides precursors;METASTABLE EQUILIBRIA; MECHANICAL-PROPERTIES; COATINGS; TEMPERATURE; CERAMICS; ALUMINA; NITRIDE; SYSTEM SO - Surface & Coatings Technology 2001 ;141(1):88-95 2310 UI - 14291 AU - Armienta MA AU - Villasenor G AU - Rodriguez R AU - Ongley LK AU - Mango H AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUNAM, Inst Geol, Mexico City, DF, MexicoAndroscogin Valley Environm Ctr, Lewiston, ME, USACastleton State Coll, Castleton, VT, USAArmienta, MA, Univ Nacl Autonoma Mexico, Inst Geofis, Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - The role of arsenic-bearing rocks in groundwater pollution at Zimapan Valley, Mexico AB - Interaction of groundwater with As-bearing rocks has been proposed as one of three main sources of arsenic at Zimapan valley, Mexico. The complexity of the geology and hydrogeology of the valley make it difficult to identify the natural causes of arsenic poisoning. Samples from the different rock outcrops and water from wells tapping various rock formations were analyzed. The rocks from mineralized areas contained higher concentrations of arsenic with respect to the same formations in non-mineralized areas. The arsenic minerals arsenopyrite, scorodite, and tennantite were identified in some rock samples. Higher temperature and lower Eh values were found for those wells containing more arsenic. The physicochemical characteristics of these naturally polluted well waters could be produced by arsenopyrite oxidation. The geochemical model PHREEQCI was used to perform the inverse modeling of two wells located along the same fault. Arsenopyrite oxidation and scorodite dissolution appear to be the geochemical processes producing the natural pollution according to the model. The release and transport of arsenic mainly occur through fractures within the cretaceous limestones where the most productive wells are drilled. The presence of arsenic should be expected also in other formations near mineralized zones in the Zimapan Valley. Field determinations of Eh and T could be used to detect potentially polluted wells MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 21 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000167010700018 L2 - arsenic;arsenopyrite;groundwater;Mexico;Zimapan;UNITED-STATES; DEPOSITS; WATER; STABILITY; ANTIMONY SO - Environmental Geology 2001 ;40(4-5):571-581 2311 UI - 13595 AU - Arrese JE AU - Dominguez-Soto L AU - Hojyo-Tomoka MT AU - Vega-Memije E AU - Cortes-Franco R AU - Guevara E AU - Pierard GE AD - Univ Liege, Med Ctr, Dept Dermatopathol, Liege, BelgiumHosp Gral Dr Manuel Gea Gonzalez, Dept Dermatol, Mexico City, DF, MexicoPierard, GE, CHU Sart Tilman, Dept Dermatopathol, B-4000 Liege, Belgium TI - Effecters of inflammation in actinic prurigo AB - Background: Actinic prurigo is a specific familiar photodermatosis of uncertain pathogenesis. Objective: Our purpose was to investigate the immunohistologic presentation of actinic prurigo to explore the involved pathomechanisms. Methods: The present immunohistochemical study was performed on biopsy specimens from 20 Mexican patients presenting with a severe and perennial form of the disease. Results: The dense inflammatory infiltrate was composed predominantly of helper T type 1 lymphocytes admixed with scattered B-cell lymphoid follicles and numerous dermal dendrocytes. Keratinocytes contained abundant tumor necrosis factor-alpha and calprotectin. Conclusion: In subjects genatically predisposed to actinic prurigo, ultraviolet light may trigger excessive tumor necrosis factor-alpha production by keratinocytes whose sustained release in turn exerts its proinflammatory activity and deleterious epidermal effects. Such a cascade of events is in line with the therapeutic benefit already reported when thalidomide is used to treat actinic prurigo MH - Belgium MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 6 U4 - Dermatology U5 - J;Article AV - English IS - 0190-9622 UR - ISI:000168987300007 L2 - TUMOR-NECROSIS-FACTOR; FACTOR-ALPHA; EPIDERMAL-CELLS; FLOW-CYTOMETRY; LIGHT ERUPTION; INTERLEUKIN-2; HLA-DR4; FIBROBLASTS; EXPRESSION; INDIANS SO - Journal of the American Academy of Dermatology 2001 ;44(6):957-961 2312 UI - 12696 AU - Arroyo M AU - Bernes S AU - Melendez L AU - Richards RL AU - Torrens H AD - BUAP, Inst Ciencias, Ctr Quim, Puebla 72571, MexicoJohn Innes Ctr Plant Sci Res, Nitrogen Fixat Lab, Norwich NR4 7UH, Norfolk, EnglandUniv Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrado, Mexico City 04510, DF, MexicoArroyo, M, BUAP, Inst Ciencias, Ctr Quim, Apdo Postal J-42, Puebla 72571, Mexico TI - Fluorothiolate-dithioacid complexes of ruthenium(III) and osmium(III): crystal structure of [Os(SC6F5)(2)(S2CNEt2)(PMe2Ph)(2)] AB - Treatment of the coordinative unsaturated complexes [M(SRF)(3)(PMe2Ph)(2)] (M = Os or Ru; R-F = C6F5 or C6F4H-4) with M'S(2)Z (M' = Na, S(2)Z = S2CNEt2; M' = K, S(2)Z = S2COEt) and [Os(SRF)(3)(PMe2Ph)(2)] (R-F = C6F5 or C6F4H-4) with M'S(2)Z [M' = Na; S(2)Z = S2P(OEt)(2)] in Me2CO solution, gave the paramagnetic Os-III and Ru-III derivatives, [M(SRF)(2)(S(2)Z)(PMe2Ph)(2)]. X-ray crystallography shows that [Os(SC6F5)(2)(S2CNEt2)(PMe2Ph)(2)] has an octahedral geometry with trans-fluorothiolates, cis-phosphines and a chelating N,N-diethyldithiocarbamate ligand MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0340-4285 UR - ISI:000171406300002 L2 - THIOLATE COMPLEXES; C6F4H-4 SO - Transition Metal Chemistry 2001 ;26(6):608-612 2313 UI - 13666 AU - Arroyo P AU - Fernandez V AU - Pardio J AU - Medina M AU - Vargas L AU - Ward R AD - Fdn Mexicana Salud, Mexico City, DF, MexicoFunsalud Capitulo Peninsular, Mexico City, DF, MexicoUniv Oxford, Oxford OX1 2JD, England TI - Genetic epidemiology of obesity, diabetes, hypertension and dislipidemias in two rural communities from Mexico: Preliminary results MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0194-911X UR - ISI:000167748000041 SO - Hypertension 2001 ;37(3):989-989 2314 UI - 12499 AU - Arz JA AU - Arenillas I AU - Soria AR AU - Alegret L AU - Grajales-Nishimura JM AU - Liesa CL AU - Melendez A AU - Molina E AU - Rosales MC AD - Fac Ciencias, Dept Ciencias Tierra, Zaragoza 50009, SpainInst Mexicano Petr, Programa YNF, Mexico City 07730, DF, MexicoInst Mexicano Petr, Direcc Explorac & Prod, Mexico City 07730, DF, MexicoArz, JA, Fac Ciencias, Dept Ciencias Tierra, Edificio Geol Campus Univ Plaza San Francisco, Zaragoza 50009, Spain TI - Micropaleontology and sedimentology across the Cretaceous/Tertiary boundary at La Ceiba (Mexico): impact-generated sediment gravity flows AB - A micropaleontological and sedimentological study across the Cretaceous/Tertiary boundary-officially Cretaceous/Paleogene (K/P) boundary from the La Ceiba section (Mexico) was performed to examine the K/P planktic foraminiferal biostratigraphy, the sedimentology of a controversial K/P elastic unit, and the benthic and planktic foraminiferal assemblages turnover across this boundary. The elastic unit is stratigraphic ally placed between two pelagic marly units (Mendez and Velasco Formations) and displays a fining-upward gradation similar to a turbidite sequence. This K/P elastic unit contains a basal subunit consisting of calcareous marls rich in millimeter-sized spherules (microtektites) altered to clay minerals, abundant detrital quartz, mica minerals, and shocked quartz. According to the K/P stratotype definition from El Kef (Tunisia), the K/P boundary at La Ceiba must be placed at the base of the elastic (micro spherules) unit since it is equivalent to the base of the boundary clay at El Kef. A short hiatus affects the lower part of the Danian, including the Guembelitria cretacea and Parvularugoglobigerina eugubina biozones and the lower part of the Parasubbotina pseudobulloides biozone. Nearly all commonly recorded Maastrichtian planktic foraminiferal species were found in the uppermost Maastrichtian interval, and there was no support for a gradual mass extinction pattern in the terminal Cretaceous. Benthic foraminiferal assemblages suggest that the La Ceiba section was deposited at lower bathyal depths. Oscillating megatsunami waves and/or a sea-level lowstand cannot explain the nature of the elastic deposits because of the observed deposition paleodepth (more than 1000 in). There is also evidence that the elastic unit was deposited under a W.-h-sedimentation rate in upper flow regimes and that was emplaced as a single-pulse event as turbidites. This datum and other sedimentological features support a sediment gravity flow genesis for the elastic unit. All these results are consistent with the K/P impact theory and the asteroid impact on the Yucatan Peninsula. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000171888900006 L2 - Cretaceous/Tertiary boundary;La Ceiba;impact generated sediment gravity flows;BENTHIC FORAMINIFERAL ASSEMBLAGES; TERTIARY BOUNDARY; EL-KEF; NORTHEASTERN MEXICO; MASS EXTINCTION; CHANNEL DEPOSITS; PLANKTONIC-FORAMINIFERA; PALEOGENE BOUNDARY; ATLANTIC; TUNISIA SO - Journal of South American Earth Sciences 2001 ;14(5):505-519 2315 UI - 12372 AU - Asherson RA AU - Cervera R AU - Piette JC AU - Shoenfeld Y AU - Espinosa G AU - Petri MA AU - Lim E AU - Lau TC AU - Gurjal A AU - Jedryka-Goral A AU - Chwalinska-Sadowska H AU - Dibner RJ AU - Rojas-Rodriguez J AU - Garcia-Carrasco M AU - Grandone JT AU - Parke AL AU - Barbosa P AU - Vasconcelos C AU - Ramos-Casals M AU - Font J AU - Ingelmo M AD - Hosp Clin Barcelona, Unitat Malalties Autoimmunes Sistemiques, Inst Clin Infecc & Immunol, Inst Invest Biomed August Pi & Sunyer, E-08036 Barcelona, Catalonia, SpainUniv Cape Town, Sch Med, Rheumat Dis Unit, Dept Med, ZA-7925 Cape Town, South AfricaHop La Pitie Salpetriere, Dept Internal Med, Paris, FranceChaim Sheba Med Ctr, Res Ctr Autoimmune Dis, IL-52621 Tel Hashomer, IsraelJohns Hopkins Univ Hosp, Div Rheumatol, Baltimore, MD 21287, USATan Tock Seng Hosp, Singapore, SingaporeBarbara Ann Karmanos Canc Inst, Div Hematol Oncol, Detroit, MI, USAInst Rheumatol, Dept Connect Tissue Dis, Warsaw, PolandEnglewood Hosp & Med Ctr, Dept Med, Englewood, NJ, USABenemerita Univ Autonoma Puebla, Dept Reumatol, Puebla, MexicoUniv Connecticut, Ctr Hlth, Div Rheumatol, Farmington, CT, USAHosp San Antonio, Dept Internal Med, Oporto, PortugalCervera, R, Hosp Clin Barcelona, Unitat Malalties Autoimmunes Sistemiques, Inst Clin Infecc & Immunol, Inst Invest Biomed August Pi & Sunyer, Villarroel 170, E-08036 Barcelona, Catalonia, Spain TI - Catastrophic antiphospholipid syndrome - Clues to the pathogenesis from a series of 80 patients MH - France MH - Israel MH - Mexico|Puebla MH - Poland MH - Portugal MH - Singapore MH - South Africa MH - Spain MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 138 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000172243400002 L2 - BONE-MARROW NECROSIS; SYSTEMIC-LUPUS-ERYTHEMATOSUS; ANTIBODY SYNDROME; ANTIPHOSPHATIDYLSERINE ANTIBODIES; CYTOMEGALOVIRUS-INFECTION; AUTOIMMUNE-DISEASES; ADRENAL HEMORRHAGE; MOLECULAR MIMICRY; HIV-INFECTION; THROMBOSIS SO - Medicine 2001 ;80(6):355-377 2316 UI - 14013 AU - Ashtekar A AU - Corichi A AU - Sudarsky D AD - Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoAshtekar, A, Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Hairy black holes, horizon mass and solitons AB - Properties of the horizon mass of hairy black holes are discussed with emphasis on certain subtle and initially unexpected features. A key property suggests that hairy black holes may be regarded as 'bound states' of ordinary black holes (without hair) and coloured solitons. This model is then used to predict the qualitative behaviour of the horizon properties of hairy black holes, to provide a physical 'explanation' of their instability and to put qualitative constraints on the end-point configurations that result from this instability. The available numerical calculations support these predictions. Furthermore, the physical arguments are robust and should also be applicable in more complicated situations where detailed numerical work is yet to be carried out MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000167882000011 L2 - YANG-MILLS EQUATIONS; CATASTROPHE-THEORY; INSTABILITY; STABILITY; MECHANICS; EXISTENCE; SMOOTH SO - Classical and Quantum Gravity 2001 ;18(5):919-940 2317 UI - 14157 AU - Assem I AU - Marcos EN AU - de la Pena JA AD - Univ Sherbrooke, Dept Math & Informat, Fac Sci, Sherbrooke, PQ J1K 2R1, CanadaInst Matemat & Estatist, Dept Matemat, BR-05508900 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoAssem, I, Univ Sherbrooke, Dept Math & Informat, Fac Sci, Sherbrooke, PQ J1K 2R1, Canada TI - The simple connectedness of a tame tilted algebra MH - Brazil MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000167404300012 L2 - simply connected algebras;tame tilted algebras;Hochschild cohomology of algebras SO - Journal of Algebra 2001 ;237(2):647-656 2318 UI - 12285 AU - Atakishiyev NM AU - Pogosyan GS AU - Vicent LE AU - Wolf KB AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Theoret Phys Lab, Dubna, RussiaAtakishiyev, NM, UNAM, Inst Matemat, Apartado Postal 273-3, Cuernavaca 62210, Morelos, Mexico TI - Finite two-dimensional oscillator: I. The cartesian model AB - A finite two-dimensional oscillator is built as the direct product of two finite one-dimensional oscillators, using the dynamical Lie algebra su(2)(x) circle times su(2)(y). The position space in this model is a square grid of points. While the ordinary 'Continuous' two-dimensional quantum oscillator has a symmetry algebra u(2), the symmetry algebra of the finite model is only u(1)(x) circle times u(1)(y), because it lacks rotations in the position (and momentum) plane. We show how to 'import' an SO (2) group of rotations from the continuum model that transforms unitarily the finite wavefunctions on the fixed square grid. We thus propose a finite analogue for fractional U(2) Fourier transforms MH - Mexico|Morelos MH - Russia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000172468900010 L2 - FRACTIONAL FOURIER-TRANSFORMS; HARMONIC-OSCILLATOR; EQUATION; SYSTEMS SO - Journal of Physics A-Mathematical and General 2001 ;34(44):9381-9398 2319 UI - 12286 AU - Atakishiyev NM AU - Pogosyan GS AU - Vicent LE AU - Wolf KB AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Theoret Phys Lab, Dubna, RussiaAtakishiyev, NM, UNAM, Inst Matemat, Apartado Postal 273-3, Cuernavaca 62210, Morelos, Mexico TI - Finite two-dimensional oscillator: II. The radial model AB - A finite two-dimensional radial oscillator of (N + 1)(2) points is proposed, with the dynamical Lie algebra so(4) = su(2)(x) circle plus su(2)(y) examined in part I of this work, but reduced by a subalgebra chain so(4) superset of so(3) superset of so(2). As before, there are a finite number of energies and angular momenta; the Casimir spectrum of the new chain provides the integer radii 0 less than or equal to rho less than or equal to N, and the 2 rho + 1 discrete angles on each circle rho are obtained from the finite Fourier transform of angular momenta. The wavefunctions of the finite radial oscillator are so (3) Clebsch-Gordan coefficients. We define here the Hankel-Hahn transforms (with dual Hahn polynomials) as finite-N unitary approximations to Hankel integral transforms (with Bessel functions), obtained in the contraction limit N --> infinity MH - Mexico|Morelos MH - Russia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000172468900011 L2 - FRACTIONAL FOURIER-TRANSFORMS; SYSTEMS; UNCERTAINTY; PHASE SO - Journal of Physics A-Mathematical and General 2001 ;34(44):9399-9415 2320 UI - 12602 AU - Atanassov P AU - Borries C AU - Zaharieva M AU - Monneveux P AD - INRA, ENSA, UMR Diversite & Genome Plantes Cultivees, F-34060 Montpellier, FranceInst Barley, Karnobat 8400, BulgariaZaharieva, M, CIMMYT Wheat Program, AP 6-64, Mexico City 10660, DF, Mexico TI - Hordein polymorphism and variation of agromorphological traits in a collection of naked barley AB - Genetic diversity among 49 naked barley accessions originating from three different breeding centers (International Center for Agricultural Research in Dry Areas, Aleppo, Syria, Genetic Institute of Sofia, Bulgaria and Timiriazev Agricultural Academy of Moscow, Russia) was investigated using hordein polymorphism and agromorphological variation. The hordein electrophoresis revealed significant polymorphism: four different patterns (L, N, H1, H2) were distinguished for the D-, twelve for the C- and thirteen for the B-hordein groups. Among the 49 accessions, 30 distinct patterns were identified. A genetic distance matrix based on Jaccard coefficient was elaborated and converted to a dendrogram using UPGMA analysis. Four main clusters, and some distant accessions were identified. The widest range of genetic variability was found in ICARDA germplasm. A Principal Component Analysis based on agromorphological traits divided the whole collection in the three groups corresponding to the three different origins. The analysis of hordein polymorphism permitted the description of genetic relatedness within the naked barley collection while the evaluation of agromorphological traits permitted the identification of accessions with promising agronomical characteristics. The value of both approaches for the study of genetic resources and their subsequent use in breeding is discussed MH - Bulgaria MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000171661700005 L2 - agromorphological traits;genetic diversity;hordein polymorphism;naked barley;STORAGE PROTEINS; VARIETAL IDENTIFICATION; ENVIRONMENTAL VARIATION; ELECTROPHORESIS; POLYPEPTIDES; COMPONENTS; CULTIVARS; LOCUS; BRAN; HULL SO - Genetic Resources and Crop Evolution 2001 ;48(4):353-360 2321 UI - 13269 AU - Auger JC AU - Stout B AU - Barrera RG AU - Curiel F AD - COMEX, Ctr Invest Polimeros, Tepexpan 55885, Estado De Mexic, MexicoCtr St Jerome, Fac Sci & Tech, LOE UPRESA 6079, F-13397 Marseille 20, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBarrera, RG, COMEX, Ctr Invest Polimeros, Marcos Achar Lobaton 2, Tepexpan 55885, Estado Mexico, Mexico TI - Scattering properties of rutile pigments located eccentrically within microvoids AB - We study the optical properties of opaque polymer pigmented coatings. The system consists of spherical rutile particles encapsulated in spherical microvoids embedded in a transparent polymer resin, The single-scattering properties of this system have been analyzed already, in case the rutile particle is located at the center of the microvoid. Here, we use a T-matrix approach to generalize and extend this analysis to the more realistic case when the rutile particles is located off-center within the microvoid. We also consider the multiple-scattering effects of a cluster composed by a collection of air bubbles with off-center rutile inclusions. Our calculations take into account the multiple scattering and the dependent-scattering processes of each pigment particle of the aggregate, using a new recursive T-matrix algorithm. (C) 2001 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Spectroscopy U5 - J;Article AV - English IS - 0022-4073 UR - ISI:000169975700022 L2 - multiple-scattering;off-center inclusions;T-matrix;ELECTROMAGNETIC SCATTERING; T-MATRIX; LIGHT-SCATTERING; CROSS-SECTIONS; SPHERES; INCLUSION SO - Journal of Quantitative Spectroscopy & Radiative Transfer 2001 ;70(4-6):675-695 2322 UI - 12295 AU - Avallone S AU - Guiraud JP AU - Guyot B AU - Olguin E AU - Brillouet JM AD - CIRAD, Dept CP, F-34398 Montpellier 5, FranceCIRAD, Dept FLHOR, F-34398 Montpellier, FranceUSTL, GBSA, Lab Genie Biol & Sci, F-34095 Montpellier 5, FranceInst Ecol, Xalapa 91000, Veracruz, MexicoBrillouet, JM, CIRAD, Dept CP, TA 50-16,Ave Agropolis, F-34398 Montpellier 5, France TI - Fate of mucilage cell wall polysaccharides during coffee fermentation AB - Effects of a 20-h fermentation on cell wall polysaccharides from the mucilage of pulped coffee beans were examined and compared to those of unfermented beans, on alcohol insoluble residues (AIRs), their hot-water-soluble crude pectic substances (PECTs), and their hot-water-insoluble residues (RESs). Yields and compositions were very similar: AIRs, which consisted of similar to 30% highly methylated pectic substances, similar to9% cellulose, and similar to 15% neutral noncellulosic polysaccharides, exhibited no apparent degradation. However, PECTs from fermented beans were shown to have undergone a slight reduction of their intrinsic viscosity and weight-average molecular weight by capillary viscosimetry and high-performance size-exclusion chromatography. After fermentation, hot-water-insoluble pectic substances of RES exhibited partial de-esterification. Removal of coffee bean mucilage by natural fermentation seems to result from a restricted pectolysis, the mechanism of which remains to be elucidated MH - France MH - Mexico|Veracruz PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000172467200074 L2 - coffee;Coffea arabica L var. typica Cramer;mucilage;fermentation;cell wall polysaccharides;QUANTITATIVE-DETERMINATION; EXTRACTION; PECTINS SO - Journal of Agricultural and Food Chemistry 2001 ;49(11):5556-5559 2323 UI - 14239 AU - Avallone S AU - Guyot B AU - Brillouet JM AU - Olguin E AU - Guiraud JP AD - Univ Montpellier 2, GBSA MBI CC 23, USTL F34095, F-34095 Montpellier 5, FranceCIRAD CP, Montpellier, FranceCIRAD FLHOR, Montpellier, FranceInst Ecol, Xalapa, Veracruz, MexicoGuiraud, JP, Univ Montpellier 2, GBSA MBI CC 23, USTL F34095, Pl Eugene Bataillon, F-34095 Montpellier 5, France TI - Microbiological and biochemical study of coffee fermentation AB - The coffee fermentation microflora were rich and mainly constituted of aerobic Gram-negative bacilli, with Erwinia and Klebsiella genuses at the highest frequencies. The best population increase was observed with lactic acid bacteria and yeasts, whereas those microorganisms that counted on a pectin medium remained constant during the fermentation step. Qualitatively, lactic acid bacteria belonged mainly to Leuconostoc mesenteroides species but the others microflora were relatively heterogeneous. The microorganisms isolated on pectin medium were Enterobacteriaceae, identified as Erwinia herbicola and Klebsiella pneumoniae, not reported as strong pectolytic strains. Throughout coffee fermentation, 60% of the simple sugars were degraded by the total microflora and not specifically by pectolytic microorganisms MH - France MH - Mexico|Veracruz PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000167196900005 SO - Current Microbiology 2001 ;42(4):252-256 2324 UI - 13906 AU - Avila R AU - Vernin J AU - Sanchez LJ AD - UNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Nice, CNRS, UMR 6525 Astrophys, F-06108 Nice, FranceUNAM, Inst Astron, Mexico City 04510, DF, MexicoAvila, R, UNAM, Inst Astron, Apdo Postal 72-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Atmospheric turbulence and wind profiles monitoring with generalized scidar AB - We present a method for simultaneous measurement of the vertical distribution of the optical turbulence strength C-N(2)(h) and wind velocity V(h) in the Earth's atmosphere, based on an analysis of spatio-temporal based on an analysis of spatio-temporal correlations of stellar scintillation images obtained with generalized scidar. A statistical comparison of V(h) obtained with this method and instrumented balloons supports the use of this method. The algorithm used allows for the identification of dome seeing, which can be subtracted from C-N(2)(h), to obtain a turbulence profile free of dome contribution. Examples of simultaneous C-N(2)(h) and V(h) monitorings are presented MH - France MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168195800036 L2 - atmospheric effects;turbulence;site testing;methods : data analysis;instrumentation : adaptive optics;FRONT OUTER SCALE; ADAPTIVE-OPTICS; NUMERICAL-MODEL; GSM INSTRUMENT; LA-SILLA; ISOPLANATISM; LAYER; SCINTILLATION; RESOLUTION SO - Astronomy and Astrophysics 2001 ;369(1):364-372 2325 UI - 12568 AU - Avramenko AA AU - Kobzar SG AU - Shevchuk IV AU - Kuznetsov AV AU - Iwanisov LT AD - Natl Acad Sci Ukraine, Inst Engn Thermophys, UA-252057 Kiev, UkraineN Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27606, USAKiev Polytech Inst, UA-252056 Kiev, UkraineAvramenko, AA, Natl Autonomous Univ Mexico, Energy Res Ctr, AP 34, Temixco 62580, Morelos, Mexico TI - Symmetry of turbulent boundary-layer flows: Investigation of different eddy viscosity models AB - The symmetrical properties of the turbulent boundary-layer flows and other turbulent flows are studied utilizing the Lie group theory technique. The self-similar forms of the independent variables and the solution function for the turbulent boundary layer flows with three different models of the turbulent (eddy) viscosity are obtained. Proceeding from this analysis, a simple numerical method for computation of turbulent flows is developed MH - Mexico|Morelos MH - Ukraine MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 2 U4 - Mechanics U5 - J;Article AV - English IS - 0001-5970 UR - ISI:000171752800001 SO - Acta Mechanica 2001 ;151(1-2):1-14 2326 UI - 13448 AU - Ayala L AU - Henry M AU - Gonzalez-de-Leon D AU - van Ginkel M AU - Mujeeb-Kazi A AU - Keller B AU - Khairallah M AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandHenry, M, CIMMYT, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - A diagnostic molecular marker allowing the study of Th. intermedium-derived resistance to BYDV in bread wheat segregating populations AB - Barley yellow dwarf (BYD) is the most important viral disease of small cereal grains. True resistance to the disease is not found in wheat (Triticum aestivtium L.), but it has been introgressed from Thinopyrum intermedium (Ti) on chromosome 7DL of recombinant wheat lines designated TC. The objectives of our study were to identify a high through-put scoring tool for the presence of the translocated Th. intermedium fragment and to assess its suitability for evaluating resistance to BYDV in segregating populations. Segregation of the Ti fragment was followed in the F-2 population of an Anza (bread wheat) by TC14/2*Spear (TC14) cross. Resistance to BYDV isolates PAV-Mex and MAV-Mex in F-3, F-4 and F-5 populations was evaluated under field and/or greenhouse conditions by measuring the virus titers of infected plants using ELISA, and the number of infected plants per plot. The SSR marker gwm37 was polymorphic for the translocation. In F-4 lines it was associated with the physical presence of an intact translocation on chromosome 7DL and with low virus titers of BYDVPAV. Reductions in virus titer of 27% and 55% in the F-3 and 18% and 45% in the F-5 populations were observed when the fragment was present in the heterozygous and homozygous states, respectively, confirming a dosage effect of the resistance allele. A lower proportion of infected individuals in the field was associated with the presence of the fragment, indicating a mechanism that may interfere with aphid feeding or virus translocation within infected plants. Despite significant differences between groups with and without the fragment, the OD values of infected lines overlapped, and it was not possible to definitively detect the fragment based solely on ELISA. We conclude that gwm37 is a reliable marker for the Ti translocation that will allow efficient detection of the translocation in breeding populations and greatly assist in selecting BYDV-resistant wheats in the absence of the disease MH - Mexico|Distrito Federal MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000169278600021 L2 - alien-derived resistance;barley yellow dwarf;ELISA;Thinopyrum intermedium;translocation;SSR marker;BARLEY YELLOW DWARF; IN-SITU HYBRIDIZATION; VIRUS-RESISTANCE; THINOPYRUM-INTERMEDIUM; MICROSATELLITE MARKERS; CHROMOSOMAL LOCATION; ADDITION LINES; PLANT-VIRUSES; DNA; INHERITANCE SO - Theoretical and Applied Genetics 2001 ;102(6-7):942-949 2327 UI - 14624 AU - Ayala L AU - van Ginkel M AU - Khairallah M AU - Keller B AU - Henry M AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandETH Zentrum, Swiss Fed Inst Technol, CH-8092 Zurich, Switzerlandvan Ginkel, M, CIMMYT, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Expression of Thinopyrum intermedium-derived Barley yellow dwarf virus resistance in elite bread wheat backgrounds AB - Resistance to Barley yellow dwarf virus (BYDV) is not found in wheat but is available in a Thinopyrum intermedium translocation (Ti) carried on chromosome 7DL of bread wheat recombinant lines. We used one of those lines (TC14/2*Spear) to introgress the Ti into bread wheat cultivars and to determine the influence of wheat backgrounds, with and without known tolerance to BYDV, on the expression of resistance. Two single and three backcross populations, segregating for the presence of the alien fragment, were tested under field conditions and artificial inoculation with BYDV isolates MAV-Mex and PAV-Mex. Lines containing the fragment were identified using the microsatellite marker gwm37. Tillering, biomass, grain yield, thousand-kernel weight, and seed quality were evaluated in inoculated and noninoculated plots. Resistance was assessed by enzyme-linked immunosorbent assay. In early generations, the alien fragment followed expected Mendelian segregation, whereas in the advanced ones a slight bias against its transmission was observed. No positive nor negative effects of Ti on agronomic performance and quality were found. A significant optical density reduction in individuals carrying the fragment was observed after PAV infection in crosses with lines Anza and Baviacora but not with Milan. In addition, the fragment was associated with a lower frequency of infected plants for both PAV and MAV isolates. The reduced yield loss associated with the presence of the translocation was due largely to the lower infection rate MH - Mexico|Distrito Federal MH - Switzerland PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000166027300005 L2 - breeding;luteovirus;simple sequence repeat marker;TOLERANCE; CEREALS; LINES; GENE SO - Phytopathology 2001 ;91(1):55-62 2328 UI - 12937 AU - Ayala RS AU - de Castro MDL AD - Univ Cordoba, Div Analyt Chem, E-14071 Cordoba, SpainNatl Autonomous Univ Mexico, Fac Engn, Div Basic Sci, Mexico City 04510, DF, Mexicode Castro, MDL, Univ Cordoba, Div Analyt Chem, Annex C-3,Campus Rabanales, E-14071 Cordoba, Spain TI - Continuous subcritical water extraction as a useful tool for isolation of edible essential oils AB - A method for extraction of oregano oil based on the use of subcritical water is proposed. Ground oregano (ca. 1.8 g accurately weighed) was extracted with water at 2.0 MPa, 125 degreesC and 1 ml min(-1) for 24 min. The extracted compounds were removed from the aqueous extract by a single extraction with 4 ml hexane, determined by gas-chromatography-flame ionisation (GC-FID) and identified by mass spectrometry (MS). Hydrodistillation was performed on 30 g of ground oregano with 500 ml water for 3 h for comparison of the results with those provided by the proposed method. The subcritical water extraction-based method is clearly quicker and more efficient than the conventional: yields from the former for eight of the 11 major compounds in the extract are higher after 15-min extraction than after hydrodistillation for 3 h. This enables substantial cost savings of both energy and raw material. In addition, the proposed method has the possibility of manipulating the composition of the oil and thus its quality. The aqueous-oil extract was investigated for essential oil preparative purposes and several last, cheap and clean alternatives for breaking the emulsion and separating the phases are proposed. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000170885600013 L2 - continuous subcritical water extraction;esential oil;oregano;CONVENTIONAL TECHNIQUES; SUPERHEATED WATER; SOIL; IMMUNOASSAY SO - Food Chemistry 2001 ;75(1):109-113 2329 UI - 14285 AU - Aydin H AU - Melhem R AU - Mosse D AU - Mejia-Alvarez P AD - Univ Pittsburgh, Dept Comp Sci, Pittsburgh, PA 15260, USAIPN, CINVESTAV, Secc Computac, Mexico City 07300, DF, MexicoAydin, H, Univ Pittsburgh, Dept Comp Sci, Pittsburgh, PA 15260, USA TI - Optimal reward-based scheduling for periodic real-time tasks AB - Reward-based scheduling refers to the problem in which there is a reward associated with the execution of a task. In our framework, each real-time task comprises a mandatory and an optional part. The mandatory part must complete before the task's deadline, while a nondecreasing reward function is associated with the execution of the optional part, which can be interrupted at any time. Imprecise computation and Increased-Reward-with-increased-Service models fall within the scope of this framework. In this paper, we address the reward-based scheduling problem for periodic tasks. An optimal schedule is one where mandatory parts complete in a timely manner and the weighted average reward is maximized. For linear and concave reward functions, which are most common, we 1) show the existence of an optimal schedule where the optional service time of a task is constant at every instance and 2) show how to efficiently compute this service time. We also prove the optimality of Rate Monotonic Scheduling (with harmonic periods), Earliest Deadline First, and Least Laxity First policies for the case of uniprocessors when used with the optimal service times we computed. Moreover, we extend our result by showing that any policy which can fully utilize all the processors is also optimal for the multiprocessor periodic reward-based scheduling. To show that our optimal solution is pushing the limits of reward-based scheduling, we further prove that, when the reward functions are convex, the problem becomes NP-Hard. Our static optimal solution, besides providing considerable reward improvements over the previous suboptimal strategies, also has a major practical benefit: Run-time overhead is eliminated and existing scheduling disciplines may be used without modification with the computed optimal service times MH - Mexico|Distrito Federal MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 14 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9340 UR - ISI:000167090400002 L2 - real-time systems;imprecise computation;periodic task scheduling;deadline scheduling;reward maximization;IMPRECISE COMPUTATIONS; ALGORITHMS; DEADLINES SO - Ieee Transactions on Computers 2001 ;50(2):111-130 2330 UI - 13279 AU - Ayers ML AU - Mejia R AU - Ward J AU - Lentine T AU - Mahler DA AD - Dartmouth Hitchcock Med Ctr, Dartmouth Med Sch, Dept Med, Pulm & Crit Care Med Sect, Lebanon, NH 03756, USANatl Inst Resp Dis, Mexico City, DF, MexicoMahler, DA, Dartmouth Hitchcock Med Ctr, Dartmouth Med Sch, Dept Med, Pulm & Crit Care Med Sect, 1 Med Ctr Dr,3-D, Lebanon, NH 03756 USA TI - Effectiveness of salmeterol versus ipratropium bromide on exertional dyspnoea in COPD AB - The hypothesis of the study was that salmeterol and ipratropium would have similar dyspnoea ratings during steady-state cycle ergometry at 1 h, but that salmeterol would reduce dyspnoea at 6 h after administration in patients with chronic obstructive pulmonary disease (COPD), The study design was a randomized, double-blind trial in 16 patients (aged 63 +/- 11 yrs) with symptomatic CORD, Two days after familiarization with testing procedures, patients were randomly assigned to receive either two puffs (42 pg) of salmeterol and two puffs of placebo inhaler, or two puffs (36 mug) of ipratropium from each of two inhalers (total, 72 mug). Two days later, patients received the alternative medication. During exercise at 60% of peak oxygen consumption patients rated dyspnoea and performed inspiratory capacity manoeuvres each minute, Forced expiratory volume in one second was 1.13 +/-0.48 L (37 +/- 13% predicted). Dyspnoea ratings were similar for salmeterol and ipratropium at 1 and 6 h, Inspiratory capacity was similar for salmeterol and ipratropium at I h, but significantly higher for salmeterol at 6 h (Delta = 120 mL; p = 0.03), It is concluded that with the doses used, salmeterol and ipratropium provided similar dyspnoea ratings during exercise at 1 and 6 h after administration MH - Mexico|Distrito Federal MH - USA PB - SHEFFIELD: EUROPEAN RESPIRATORY SOC JOURNALS LTD RP - NOT IN FILE U3 - TC 16 U4 - Respiratory System U5 - J;Article AV - English IS - 0903-1936 UR - ISI:000169967700013 L2 - bronchodilator therapy;dyspnoea ratings;inspiratory capacity;OBSTRUCTIVE PULMONARY-DISEASE; AIR-FLOW LIMITATION; DYNAMIC HYPERINFLATION; INSPIRATORY CAPACITY; EXERCISE PERFORMANCE; LUNG HYPERINFLATION; BREATHLESSNESS SO - European Respiratory Journal 2001 ;17(6):1132-1137 2331 UI - 13808 AU - Ayotte P AU - Giroux S AU - Dewailly E AU - Avila MH AU - Farias P AU - Danis R AU - Diaz CV AD - Univ Laval, Med Res Ctr, CHUQ, Publ Hlth Res Inst, Beauport, PQ G1E 7G9, CanadaNatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoNatl Inst Perinatal, Mexico City, DF, MexicoAyotte, P, Univ Laval, Med Res Ctr, CHUQ, Publ Hlth Res Inst, 2400 Estimauville, Beauport, PQ G1E 7G9, Canada TI - DDT spraying for malaria control and reproductive function in Mexican men MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 36 U4 - Public, Environmental & Occupational Health U5 - J;Letter AV - English IS - 1044-3983 UR - ISI:000168367000022 SO - Epidemiology 2001 ;12(3):366-367 2332 UI - 11466 AU - az-Alcantara O AU - McCluskey D AD - Univ London Imperial Coll Sci Technol & Med, Dept Comp, London SW7 2BZ, EnglandUniv Anahuac Sur, Mexico City 01780, DF, MexicoDiaz-Alcantara, O, Univ London Imperial Coll Sci Technol & Med, Dept Comp, 180 Queens Gate, London SW7 2BZ, England TI - Towards policy-based management QoS in multicommunicative education AB - This project begins with introductory comments on the need for models that maximise the benefits of e-Education for regions and persons that are not directly benefited at this time. The project also describes the Multicommunicative Education at Universidad Anahuac del Sur in Mexico and show how Quality of Service Management Policies, specified using the Ponder policy language developed at Imperial College in London can be applied in this environment MH - United Kingdom MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000174811400019 SO - Human Society and the Internet, Proceedings 2001 ;2105():237-248 2333 UI - 12907 AU - az-Avalos C AU - Peterson DL AU - Alvarado E AU - Ferguson SA AU - Besag JE AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 0100, DF, MexicoUS Geol Survey, Forest & Rangeland Ecosyst Sci Ctr, Cascadia Field Stn, Seattle, WA 98195, USAUniv Washington, Coll Forest Resources, Seattle, WA 98195, USAUS Forest Serv, USDA, Pacific NW Res Stn, Seattle, WA 98105, USAUniv Washington, Dept Stat, Seattle, WA 98195, USADiaz-Avalos, C, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726 Del Alvaro Obregon, Mexico City 0100, DF, Mexico TI - Space-time modelling of lightning-caused ignitions in the Blue Mountains, Oregon AB - Generalized linear mixed models (GLMM) were used to study the effect of vegetation cover, elevation, slope, and precipitation on the probability of ignition in the Blue Mountains, Oregon, and to estimate the probability of ignition occurrence at different locations in space and in time. Data on starting location of lightning-caused ignitions in the Blue Mountains between April 1986 and September 1993 constituted the base for the analysis. The study area was divided into a pixel-time array. For each pixel-time location we associated a value of 1 if at least one ignition occurred and 0 otherwise. Covariate information for each pixel was obtained using a geographic information system. The GLMMs were fitted in a Bayesian framework. Higher ignition probabilities were associated with the following cover types: subalpine herbaceous, alpine tundra, lodgepole pine (Pinus contorta Dougl. ex Loud.), whitebark pine (Pinus albicaulis Engelm.), Engelmann spruce (Picea engelmannii Parry ex Engelm.), subalpine fir (Abies lasiocarpa (Hook.) Nutt.), and grand fir (Abies grandis (Dougl.) Lindl.). Within each vegetation type, higher ignition probabilities occurred at lower elevations. Additionally, ignition probabilities are lower in the northern and southern extremes of the Blue Mountains. The GLMM procedure used here is suitable for analysing ignition occurrence in other forested regions where probabilities of ignition are highly variable because of a spatially complex biophysical environment MH - Mexico|Distrito Federal MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 8 U4 - Forestry U5 - J;Article AV - English IS - 0045-5067 UR - ISI:000171010900010 L2 - GENERALIZED LINEAR-MODELS; FIRE HISTORY; SPATIAL STATISTICS; BAYESIAN-ANALYSIS; FOREST; DISTURBANCES; LANDSCAPES; FREQUENCY; SYSTEMS SO - Canadian Journal of Forest Research-Revue Canadienne de Recherche Forestiere 2001 ;31(9):1579-1593 2334 UI - 11796 AU - az-Barriga-Arceo L AU - Orozco E AU - Lopez-Hirata VM AU - Umemoto M AD - Inst Politecn Nacl, ESIQIE, Mexico City 07300, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoToyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 441, JapanDiaz-Barriga-Arceo, L, Inst Politecn Nacl, ESIQIE, Apartado Postal 75-395, Mexico City 07300, DF, Mexico TI - Martensitic transformation in nanostructured Cu-Co alloys MH - Japan MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000173804000019 SO - Journal of Materials Science Letters 2001 ;20(24):2239-2241 2335 UI - 12573 AU - az-Castaneda V AU - San Martin G AD - CICESE, Dept Ecol, Ensenada, Baja California, MexicoUniv Autonoma Madrid, Fac Ciencias, Dept Biol Zool, Lab Biol Marina & Invertebrados, E-28049 Madrid, SpainDiaz-Castaneda, V, CICESE, Dept Ecol, Apartado Postal 2732, Ensenada, Baja California, Mexico TI - Syllidae (Polychaeta) from San Quintin lagoon, Baja California, Mexico, with the description of a new genus AB - During a recent study of the polychaetes from San Quintin lagoon (Baja California) 514 specimens belonging to the family Syllidae (Polychaeta) were collected, but only a few species were previously reported. In this paper, we report seven species: Syllis aciculata (Treadwell, 1945), Syllis gracilis (Grube, 1840), Syllis heterochaeta (Moore, 1909), Exogone (Exogone) lourei (Berkeley & Berkeley, 1938), Sphaerosyllis californiensis (Hartman, 1966), Grubeosyllis mediodentata, a new combination, and Cicese sphaerosylliformis, a new genus, and species. Grubeosyllis mediodentata is characterized by having cylindrical, somewhat elongated papilliform dorsal cirri, a long proventriculus and pharynx, pharyngeal tooth located in front of the midline of the pharynx, and compound setae with long bidentate blades provided with long, fine spines on margin. The new genus Cicese is similar to the genus Sphaerosyllis since it has antennae, tentacular cirri and anal cirri with bulbous bases, as well as papillae on the palps and dorsum, but it has two pairs of tentacular cirri instead of a single pair MH - Mexico|Baja California MH - Spain PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 5 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000171674900017 L2 - SPHAEROSYLLIS; EXOGONINAE; COAST; GULF; KEY SO - Proceedings of the Biological Society of Washington 2001 ;114(3):708-719 2336 UI - 13201 AU - az-Garcia JA AU - Gutierrez-Jaimez R AD - Univ Autonoma Agr Antonio Narro, Dept Estad & Calculo, Saltillo, Coahuila, MexicoUniv Granada, Dept Estad & Invest Operat, E-18071 Granada, SpainDiaz-Garcia, JA, Univ Autonoma Agr Antonio Narro, Dept Estad & Calculo, 25315 Buenavista, Saltillo, Coahuila, Mexico TI - The expected value of zonal polynomials AB - In this article we study the expected value of a zonal polynomial and of the Product of r greater than or equal to 1 zonal polynomials with respect to a symmetric function. As special cases, me find the expected values of a zonal polynomial with respect to a generalized Wishart distribution and to a class of multivariate non-centred beta distributions MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESTADISTICA INVESTIGACION OPERATIVA RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1133-0686 UR - ISI:000170061700019 L2 - generalized Wishart distribution;invariant symmetric polynomials;multivariate non-central Beta distribution;zonal polynomials SO - Test 2001 ;10(1):133-145 2337 UI - 13788 AU - az-Perez JC AU - Mejia A AU - Bautista S AU - Zavaleta R AU - Villanueva R AU - Gomez RL AD - Univ Georgia, Dept Hort, Coastal Plain Expt Stn, Tifton, GA 31794, USAInst Politecn Nacl, CEPROBI, Yautepec 62730, Morelos, MexicoDiaz-Perez, JC, Univ Georgia, Dept Hort, Coastal Plain Expt Stn, Tifton Campus, Tifton, GA 31794 USA TI - Response of sapote mamey [Pouteria sapota (Jacq,) H,E, Moore&Stearn] fruit to hot water treatments AB - The aim of this study was to determine the effect of potential insect disinfestation hot water treatments (HWT) on sapote mamey fruit ripening and quality. The center of a 0.50 kg fruit took similar to 45 min to reach the water temperature (40-60 degreesC). Once the center of the fruit reached the water temperature, fruit were held for an additional 40-60 min in the water. After immersion, fruit were allowed to dry and were held in storage at 25 degreesC for 4-6 days. Fruit treated at 40 or 45 degreesC showed no significant changes in quality, while fruit treated at 50 degreesC for 60 min ripened irregularly and had nt sh with white and dark colorations. Fruit treated at 60 degreesC for 60 min ripened more slowly and had no skin or flesh symptoms of heat injury, but had lower soluble solids and pH, higher firmness and slightly higher water loss than untreated fruit. The 60 degreesC heated fruit also showed a lesser degree of flesh browning than untreated fruit. A panel of untrained judges found no significant difference in taste or aroma. Judges did give a higher score for the flesh color of fruit treated at 60 degreesC compared with that of untreated Fruit as there was less flesh browning and a firmer flesh relative to untreated fruit. Sapote mamey fruit subjected to 60 degreesC WW-T for 60 min had relatively minor effects on fruit quality and a delayed ripening. Hot water treatments may have potential as an insect disinfestation treatment for sapote mamey. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000168427300007 L2 - quarantine;postharvest;Anastrepha;Sapotaceae;POSTHARVEST HEAT-TREATMENTS; QUARANTINE TREATMENTS; QUALITY; STORAGE; FIELD SO - Postharvest Biology and Technology 2001 ;22(2):159-167 2338 UI - 13063 AU - az-Rodriguez JA AU - Santamarina JC AD - Natl Autonomous Univ Mexico, Dept Civil Engn, Mexico City 04510, DF, MexicoGeorgia Inst Technol, Dept Civil & Environm Engn, Atlanta, GA 30332, USADiaz-Rodriguez, JA, Natl Autonomous Univ Mexico, Dept Civil Engn, Apartado Postal 70-165, Mexico City 04510, DF, Mexico TI - Mexico city soil behavior at different strains: Observations and physical interpretation AB - The unique mechanical properties of Mexico City soils plot as extreme values on most geotechnical engineering charts. The purpose of this study is to analyze salient properties and to propose conceptual models to explain them. In particular, mechanical parameters synthesized from published laboratory data are systematically organized in terms of strain level. Three strain regions are identified. The threshold strains at the boundaries between these strain regions are examined in terms of microscale processes that participate at different strains MH - Mexico|Distrito Federal MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1090-0241 UR - ISI:000170512000009 L2 - WAVE-PROPAGATION; CLAY SO - Journal of Geotechnical and Geoenvironmental Engineering 2001 ;127(9):783-789 2339 UI - 12738 AU - az-Ruiz O AU - Navarro L AU - Mendez-Diaz M AU - Galicia O AU - Elder JH AU - Sanna PP AU - Drucker-Colin R AU - Prospero-Garcia O AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoScripps Res Inst, Dept Mol Biol, La Jolla, CA 92037, USAScripps Res Inst, Dept Neuropharmacol, La Jolla, CA 92037, USAProspero-Garcia, O, Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Apartado Postal 70-250, Mexico City 04510, DF, Mexico TI - Inhibition of the ERK pathway prevents HIVgp120-induced REM sleep increase AB - Approximately 35% of HIV-infected subjects, both children and adults, exhibit alterations in the sleep-waking cycle. MV surface glycoprotein gp120 has been postulated to contribute to this abnormality. For example, it has been reported that HIVgp120 modifies sleep in freely-moving rats and that it also activates the ERK pathway in brain slices, The goal of this work was to determine if sleep changes induced by HIVgp120 in normal rats are mediated by the MAPK pathway. Our results show that a single intraventricular administration of HIVgp120 selectively increases REMS and that such an increase can be prevented by U0126, an inhibitor of ERK activating enzyme, MEK. In contrast, SB202190, a MAPK-p38 inhibitor, had no effect on HIVgp120-induced increase in REMS. These results suggest that HIVgp120 increases REMS in the rat by specifically affecting the ERK signal transduction pathway. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000171383100009 L2 - sleep-waking cycle;neurotoxicity;glutamate;chemokines;MAPK;MEK;ERK;HUMAN-IMMUNODEFICIENCY-VIRUS; PROTEIN-KINASES; COAT PROTEIN; HIV; BRAIN; RATS; NEUROTOXICITY; CHEMOKINES; GLUTAMATE; INFECTION SO - Brain Research 2001 ;913(1):78-81 2340 UI - 12154 AU - Azuma H AU - Garcia-Franco JG AU - Rico-Gray V AU - Thien LB AD - Kyoto Univ, Grad Sch Sci, Dept Bot, Kyoto 6068502, JapanInst Ecol, Dept Ecol Vegetal, Xalapa 91000, Veracruz, MexicoTulane Univ, Dept Cell & Mol Biol, New Orleans, LA 70118, USAAzuma, H, Kyoto Univ, Grad Sch Sci, Dept Bot, Kyoto 6068502, Japan TI - Molecular phylogeny of the Magnoliaceae: The biogeography of tropical and temperate disjunctions AB - The boreotropical flora concept suggests that relictual tropical disjunctions between Asia and the Americas are a result of the expansion of the circumboreal tropical flora from the middle to the close of the Eocene. Subsequently, temperate species diverged at high latitudes and migrated to other continents. To test this concept, we conducted a molecular phylogenetic analysis (using cpDNA) of the Magnoliaceae, a former boreotropical element that currently contains both tropical and temperate disjuncts. Divergence times of the clades were estimated using sequences of matK and two intergenic regions consisting of psbA-trnH and atpB-rbcL. Results indicate the tropical American section Talauma branched first, followed by the tropical Asian clade and the West Indies clade. Within the remaining taxa. two temperate disjunctions were formed. Assuming the temperate disjunction of Magnolia acuminata and Asian relatives occurred 25 mya (late Oligocene; based on seed fossil records), section Talauma diverged 42 mya (mid-Eocene), and tropical Asian and the West Indies clades 36 mya (late Eocene). These events correlate with cooling temperatures during the middle to late Eocene and probably caused the tropical disjunctions MH - Japan MH - Mexico|Veracruz MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 31 U4 - Plant Sciences U5 - J;Review AV - English IS - 0002-9122 UR - ISI:000172797600017 L2 - boreotropical florae;disjunction;Dugandiodendron;Magnolia;Magnoliaceae;matK;Splendentes;Talauma;EASTERN NORTH-AMERICA; LIRIODENDRON MAGNOLIACEAE; SECTION RYTIDOSPERMUM; ALLOZYME VARIATION; TERTIARY CLIMATES; DIVERGENCE; SEQUENCES; HEMISPHERE; ASIA; DNA SO - American Journal of Botany 2001 ;88(12):2275-2285 2341 UI - 13211 AU - Ba KM AU - az-Delgado C AU - Carsteanu A AD - Univ Autonoma Estado Mexico, Ctr Interamer Recursos Agua, Fac Ingn, Toluca 50130, MexicoINRS Eau, Ind Chair Stat Hydrol, St Foy, PQ G1V 4C7, CanadaBa, KM, Univ Autonoma Estado Mexico, Ctr Interamer Recursos Agua, Fac Ingn, CU S-N, Toluca 50130, Mexico TI - Confidence intervals of quantiles in hydrology computed by an analytical method AB - Fitting probability distributions to hydrologic data samples is widely used for quantile estimation purposes. The estimated quantile ((X) over cap (T)) is related to a return period (T). The confidence interval associated with each of the estimates has been calculated empirically, up until now, supposing that the quantile estimator is normally distributed. In this study, it is shown that the confidence interval follows a normal distribution only in the central part of the distribution. The real confidence limits are computed analytically, by defining and integrating the probability density function of the confidence interval. The results with an important number of hydrologic samples show that the upper confidence limits are significantly underestimated towards the tail of the distribution, when determined using the normality approximation for the quantile estimator MH - Canada MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0921-030X UR - ISI:000169217200001 L2 - confidence intervals;quantile estimation;hydrological analysis;normal;Gumbel and Beta distributions SO - Natural Hazards 2001 ;24(1):1-12 2342 UI - 12527 AU - Bach YR AD - Univ Wisconsin, Dept Rehabil Med, Madison, WI 53706, USAUniv Wisconsin, Dept Biomed Engn, Madison, WI 53706, USAUniv Autonoma Estado Morelos, Fac Med, Cuernavaca, Morelos, MexicoBach-Y-Rita, P, Univ Wisconsin, Dept Rehabil Med, 1300 Univ Ave,Room 2756, Madison, WI 53706 USA TI - Nonsynaptic diffusion neurotransmission in the brain: Functional considerations MH - Mexico|Morelos MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0364-3190 UR - ISI:000171871800002 L2 - RAT SPINAL-CORD; DORSAL HORN; VOLUME; INNERVATION; TRANSMISSION; MECHANISMS; ENERGY; SYSTEM; CORTEX; AXONS SO - Neurochemical Research 2001 ;26(8-9):871-873 2343 UI - 11782 AU - Backstrand JR AU - Allen LH AU - Martinez E AU - Pelto GH AD - NYU, Dept Nutr & Food Studies, New York, NY 10012, USAUniv Calif Davis, Dept Nutr, Davis, CA 95616, USAInst Nacl Nutr Salvador Zubiran, Div Nutr Comunidad, Mexico City 1400, DF, MexicoCornell Univ, Div Nutr Sci, Ithaca, NY 14853, USABackstrand, JR, NYU, Dept Nutr & Food Studies, 35 W 4th St,10th Floor, New York, NY 10012 USA TI - Maternal consumption of pulque, a traditional central Mexican alcoholic beverage: relationships to infant growth and development AB - Objectives: To document the consumption during pregnancy of pulque, a traditional central Mexican alcoholic beverage, and its relationship to subsequent infant size, physical growth and performance on the Bayley Scales of infant Development. Design: Prospective cohort study. Setting: Six villages in rural, central Mexico in 1984-1985. Subjects: Seventy mother-infant pairs. Results: Most women (72.9%) consumed pulque during pregnancy, and 28.6% consumed more than 150 g ethanol week(-1) from the beverage. individuals who consumed pulque showed no compensating decrease in energy obtained from other foods. Pulque consumption possessed curvilinear relationships with both infant length (at 1 and 6 months) and Bayley mental performance (at 6 months). Heavy pulque intakes were associated with smaller infant size and poorer mental performance, in modest quantities, pulque consumption may have been beneficial due to its micronutrient content. Conclusions: Intakes of alcohol from pulque were common among pregnant women in these rural, central Mexican villages. Given current scientific knowledge of the adverse effects of ethanol on foetal development, public health interventions are needed to reduce heavy pulque consumption during pregnancy in some areas of rural Mexico MH - Mexico|Distrito Federal MH - USA PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Nutrition & Dietetics U5 - J;Article AV - English IS - 1368-9800 UR - ISI:000173798300004 L2 - pregnancy;infant;nutrition;alcohol;growth;child development;Mexico;VILLAGE POPULATIONS; PRENATAL ALCOHOL; PREDICTED PREVALENCE; AGE; TODDLERS; EGYPT; KENYA; IRON; VITAMIN-B-12; DEFICIENCY SO - Public Health Nutrition 2001 ;4(4):883-891 2344 UI - 11483 AU - Baez-Lopez D AU - Baez-Villegas D AU - Alcantara R AU - Romero JJ AU - Escalante T AD - Univ Amer, Dept Ingn Elect, Puebla, MexicoTexas Tech Univ, Dept Class & Modern Languages & Literature, Lubbock, TX 79409, USABosch Corp, El Paso, TX, USA TI - Package for filter design based on MATLAB AB - Electric filters have a relevant importance in electronic systems because they are present in almost any electronic system, For example, communication systems, as many other electric systems, make intensive use of filtering to separate unwanted noise from the desired signal. Unfortunately, filter design is an intensive computational task requiring a significant amount of numerical calculations to obtain either the parameters of a filter transfer function or the element values for a filter circuit realization. This paper describes a software package whose purpose is to provide a tool to be used as a teaching aid in analog and digital filter design courses. The feature of this package is that it uses MATLAB \2\ for the numerical computations. The main advantage of the filter design software package described in this paper is that makes uses of one of the MATLAB toolboxes, the signals toolbox (which is used for analog and digital filter design), but used with an interface that makes possible even to the novice user to readily design filters, either analog or digital, without any previous knowledge of MATLAB or the signals toolbox. (C) 2002 Wiley Periodicals, Inc MH - Mexico|Puebla MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Education, Scientific Disciplines;Engineering, Multidisciplinary U5 - J;Article AV - English IS - 1061-3773 UR - ISI:000174763600007 L2 - filters;MATLAB applications;analog and digital filter design;computer aided design SO - Computer Applications in Engineering Education 2001 ;9(4):259-264 2345 UI - 13868 AU - Bagnoli F AU - Boccara N AU - Rechtman R AD - Univ Florence, Dipartimento Matemat Applicata, I-50139 Florence, ItalyCtr Etud Saclay, DRECAM, SPEC, F-91191 Gif Sur Yvette, FranceUniv Illinois, Dept Phys, Chicago, IL 60607, USAUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoBagnoli, F, Univ Florence, Dipartimento Matemat Applicata, Via Santa Marta 3, I-50139 Florence, Italy TI - Nature of phase transitions in a probabilistic cellular automaton with two absorbing states AB - We present a probabilistic cellular automaton with two absorbing states, which can be considered a natural extension of the Domany-Kinzel model. Despite its simplicity, it shows a very rich phase diagram, with two second-order and one first-order transition lines that meet at a bicritical point. We study the phase transitions and the critical behavior of the model using mean field approximations, direct numerical simulations and field theory. The second-order critical curves and the kink critical dynamics are found to be in the directed percolation and parity conservation universality classes, respectively. The first-order phase transition is put in evidence by examining the hysteresis cycle. We also study the "chaotic" phase, in which two replicas evolving with the same noise diverge, using mean held and numerical techniques. Finally, we show how the shape of the potential of the held-theoretic formulation of the problem can be obtained by direct numerical simulations MH - France MH - Italy MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000168215100028 L2 - KINETIC CRITICAL PHENOMENON; DIRECTED PERCOLATION; POISONING TRANSITION; FIELD-THEORY; SYSTEMS; DAMAGE; MODELS SO - Physical Review e 2001 ;63(4): 2346 UI - 11901 AU - Bahmann H AU - Gurlebeck K AU - Shapiro M AU - Sprossig W AD - Frieberg Univ Min & Technol, Freiberg, GermanyBauhaus Univ, Weimar, GermanyIPN, ESFM, Mexico City 07738, DF, MexicoBahmann, H, Frieberg Univ Min & Technol, Freiberg, Germany TI - On a modified Teodorescu transform AB - This paper is dedicated to the study of a modification of the Teodorescu transform which is related as right inverse operator to the generalized Dirac operator. Its kernel function will be described by the help of the MacDonald function. Operators of such type are useful to the study of Helmholtz equations and Maxwell systems and belong to a corresponding Clifford operator calculus. As example a constructive method for the solution of a non-linear boundary value problem of Landesman-Lazar type is outlined MH - Germany MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1065-2469 UR - ISI:000173555200002 L2 - Teodorescu transform;Clifford analysis;MacDonald function;boundary value problems SO - Integral Transforms and Special Functions 2001 ;12(3):213-226 2347 UI - 12106 AU - Bailey M AU - Plunkett FJ AU - Rothkotter HJ AU - Vega-Lopez MA AU - Haverson K AU - Stokes CR AD - Univ Bristol, Dept Vet Clin Sci, Div Mol & Cellular Biol, Bristol BS40 5DU, Avon, EnglandHannover Med Sch, Dept Funct Anat, D-30625 Hannover, GermanyIPN, CINVESTAV, Dept Expt Pathol, Mexico City 07360, DF, MexicoBailey, M, Univ Bristol, Dept Vet Clin Sci, Div Mol & Cellular Biol, Langford House, Bristol BS40 5DU, Avon, England TI - Regulation of mucosal immune responses in effector sites AB - In human disease and rodent models, immune responses in the intestinal mucosa can be damaging. Damage is characterised by villus atrophy, crypt hyperplasia and reduced ability to digest and absorb nutrients. In normal individuals active responses to harmless environmental antigens associated with food and commensal bacteria are controlled by the development of immunological tolerance. Similar pathological changes occur in piglets weaned early from their mothers. Active immune responses to food antigens are observed in these piglets, and we and others have hypothesised that the changes occur as a result of transient allergic immune responses to novel food or bacteria antigens. The normal mechanism for producing tolerance to food antigens may operate at induction (Peyer's patches and mesenteric lymph nodes) or at the effector stage (intestinal lamina propria). In our piglet studies immunological tolerance occurs despite the initial active response. Together with evidence from rodents, this observation suggests that active responses are likely to be controlled at the effector stage, within the intestinal lamina propria. Support for this mechanism comes from the observation that human and pig intestinal T-cells are susceptible to apoptosis, and that this process is accelerated by antigen. We suggest that the role of the normal mature intestinal lamina propria is a balance between immunological effector and regulatory function. In neonatal animals this balance develops slowly and is dependant on contact with antigen. Immunological insults such as weaning may tip the balance of the developing mucosal immune system into excessive effector or regulatory function resulting in transient or chronic allergy or disease susceptibility MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 23 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0029-6651 UR - ISI:000172925700002 L2 - weaning;immunity;tolerance;development;INTESTINAL LAMINA PROPRIA; ANTIBODY REPERTOIRE DEVELOPMENT; ILEAL PEYERS-PATCHES; EARLY-WEANED PIGS; T-CELLS; POSTNATAL-DEVELOPMENT; ORAL TOLERANCE; INTRAEPITHELIAL LYMPHOCYTES; NONHUMAN-PRIMATES; EPITHELIAL-CELLS SO - Proceedings of the Nutrition Society 2001 ;60(4):427-435 2348 UI - 12131 AU - Bais HP AU - Loyola-Vargas VM AU - Flores HE AU - Vivanco JM AD - Colorado State Univ, Dept Hort & Landscape Architecture, Ft Collins, CO 80526, USACtr Invest Cient Yucatan, Unidad Biol Expt, Merida 97200, Yucatan, MexicoPenn State Univ, Dept Plant Pathol, University Pk, PA 16802, USAPenn State Univ, Inst Biotechnol, University Pk, PA 16802, USAVivanco, JM, Colorado State Univ, Dept Hort & Landscape Architecture, Ft Collins, CO 80526 USA TI - Invited review: Root-specific metabolism: The biology and biochemistry of underground organs AB - The roots of higher plants comprise a metabolically active and largely unexplored biological frontier. Some of their prime features include the ability to synthesize a remarkably diverse group of secondary metabolites, and to adjust their metabolic activities in response to different abiotic and biotic stresses. This adjustment includes the ability to exude a wide array (of micro- and macromolecules into the rhizosphere and to phytoremediate toxic metals. with fit(, potential to affect and after the relationships between plants and both beneficial and deleterious soil-borne pathogens. [it the past, research oil root biology has been hampered by the underground nature of roots and the lack of suitable experimental systems to study root-root and root-microbe communications. However, recent progress in growing roots in isolation with other elements (if fit(rhizosphere has greatly facilitated the study of root-specific metabolism and contributed to our understanding (if this, organ MH - USA MH - Mexico|Yucatan PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 24 U4 - Plant Sciences;Cell Biology;Developmental Biology U5 - J;Review AV - English IS - 1054-5476 UR - ISI:000172897400003 L2 - roots;biology;biochemistry;metabolism;communication;exudation;fluorescence;LITHOSPERMUM-ERYTHRORHIZON; AGROBACTERIUM-RHIZOGENES; NATURAL-PRODUCTS; HAIRY ROOTS; SHIKONIN BIOSYNTHESIS; SECONDARY METABOLITES; T-DNA; CULTURES; CELL; EXPRESSION SO - In Vitro Cellular & Developmental Biology-Plant 2001 ;37(6):730-741 2349 UI - 13374 AU - Baker IN AU - Dominguez P AU - Herring ME AD - Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2BZ, EnglandBenemerita Univ Autonoma Puebla, FC Fis Matemat, Puebla 72570, MexicoBaker, IN, Univ London Imperial Coll Sci Technol & Med, Dept Math, Huxley Bldg, London SW7 2BZ, England TI - Dynamics of functions meromorphic outside a small set AB - The theory of Fatou and Julia is extended to include the dynamics of functions f which are meromorphic in (C) over cap outside a totally disconnected compact set E(f) at whose points the cluster set of f is (C) over cap. The Julia set is defined not only by the standard approach but is also characterized in terms of the set of points whose orbits approach a point of E(f). For the subclass where E(f) has a complement of class O-AD and the inverse of f has a finite set of singular points it is shown that neither wandering components nor Baker domains occur in F(f). As an application, functions of a certain general class are shown to have a totally disconnected Julia set MH - United Kingdom MH - Mexico|Puebla PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0143-3857 UR - ISI:000169700600002 L2 - HOLOMORPHIC SELF-MAPS; WANDERING DOMAINS; ITERATION SO - Ergodic Theory and Dynamical Systems 2001 ;21():647-672 2350 UI - 13235 AU - Bakhmutov VI AU - Bakhmutova EV AU - Belkova NV AU - Bianchini C AU - Epstein LM AU - Masi D AU - Peruzzini M AU - Shubina ES AU - Vorontsov EV AU - Zanobini F AD - AN Nesmeyanov Organoelement Cpds Inst, Moscow 117813, RussiaCNR, Ist Studio Stereochim & Energet Composti Coordina, I-50132 Florence, ItalyBakhmutov, VI, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - In-depth NMR and IR study of the proton transfer equilibrium between [{(MeC(CH2PPh2)(3)}Ru(CO)H-2] and hexafluoroisopropanol AB - The (carbonyl)dihydride complex [(triphos)Ru(CO)H-2] (2) has been synthesized by reaction of the ruthenate [(triphos)RuH3]K (triphos = MeC(CH2PPh2)(3)) with ethanol saturated with CO. A single crystal X-ray analysis and IR and NMR experiments have shown that 2 adopts in both the solid state and solution an octahedral coordination geometry with a facial triphos ligand, two cis terminal hydrides, and a terminal carbonyl. The reaction of hexafluoro-2-propanol (HFIP) with 2 has been studied in CH2Cl2 solution by IR and NMR spectroscopy. The proton donor interacts with a terminal hydride of 2 forming a rather strong hydrogen bond. The resulting H-bonded adduct [{(triphos)Ru(CO)(H)H}. . . {HOCH(CF3)(2)}] (2a) has fully been characterized by in situ NMR and IR techniques. Compound 2a is in equilibrium with the nonclassical eta(2)-H-2 complex [(triphos)Ru(CO)H(H-2)](+) (2b), which can independently be prepared by protonation of 2 with a strong protic acid at low temperature. Unequivocal characterization of the dihydrogen complex (2b) has been achieved by a multifaceted spectroscopic investigation (T>(obs)(1min) = 0.005 s (200 MHz), J(H,D) approximate to 30 Hz, DQCC = 78.3 kHz). A combined IR and NMR study of the proton transfer reaction involving 2 and HFIP in CH2Cl2 to give, first, the H-bonded adduct (2a) and, then, the dihydrogen complex (2b) has demonstrated that all these species are in equilibrium in the temperature range from 190 to 260 K. The thermodynamic parameters for the formation of 2a have independently been determined by NMR and IR methods, while those for the formation of 2b have been obtained by IR spectroscopy. An energetic profile for the reaction sequence 2 right arrow 2a right arrow 2b is proposed and discussed MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0008-4042 UR - ISI:000170070900003 L2 - hydrides;hydrogen bonding;ruthenium;IR spectroscopy;NMR spectroscopy;QUADRUPOLE COUPLING-CONSTANTS; METAL HYDRIDE COMPLEXES; DOT-H-OR; DIHYDROGEN COMPLEX; ASYMMETRY PARAMETERS; H-2-T-1 RELAXATION; SITU IR; HYDROGEN; SPECTROSCOPY; CRYSTAL SO - Canadian Journal of Chemistry-Revue Canadienne de Chimie 2001 ;79(5-6):479-489 2351 UI - 12245 AU - Bakhmutova EV AU - Cruz A AU - Ramirez-Trejo R AU - Contreras R AU - Wrackmeyer B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoInst Politecn Nacl, UPIBI, Dept Quim, Mexico City 07000, DF, MexicoWrackmeyer, B, Univ Bayreuth, Anorgan Chem Lab, POB 101251, D-95440 Bayreuth, Germany TI - The 2-imino-1,3-selenazolidine group bonded to phosphorus and silicon: a multinuclear magnetic resonance study AB - A tris(imino)phosphane (3), its sulfide [3(S)], an iminodiphenylphosphane (4), and an iminotrimethylsilane (5), in all of which the imino group belongs to a pseudo-ephedrine-derived 2-imino-1,3-selenazolidine ring, were prepared and studied by multinuclear magnetic resonance (H-1, C-13, N-15, Si-29, P-31, Se-77 NMR). By application of various 1D and 2D NMR techniques, NMR parameters such as the isotope induced chemical shifts (1)Delta N-14/15 (P-31) for 4, (1)Delta N-14/15(Si-29) for 5, numerous coupling constants and chemical shifts could be obtained. The absolute sign of (1)J(Si-29,N-15) (>0) was determined for 5. The largest values so far for (3)J(Se-77,P-31) (198.0 Hz in 3 and 194.0 Hz in 4) were observed, and the absolute sign of these coupling constants (3)J(Se-77 P-31) > 0 was determined, together with the signs of various other coupling constants involving Se-77 or P-31. Copyright (C) 2001 John Wiley & Sons, Ltd MH - Germany MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000172560400002 L2 - NMR;H-1 NMR;C-13 NMR;N-15 NMR;Si-29 NMR;P-31 NMR;Se-77 NMR;coupling signs;phosphanes;silanes;iminophosphanes;SPIN COUPLING-CONSTANTS; POLARIZATION TRANSFER; SPECTROSCOPY; ENHANCEMENT; SIGNS; N-15 SO - Magnetic Resonance in Chemistry 2001 ;39(12):739-745 2352 UI - 13087 AU - Bakhmutova EV AU - Noth H AU - Contreras R AU - Wrackmeyer B AD - Univ Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyIPN, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City, DF, MexicoUniv Munich, Dept Chem, D-80539 Munich, GermanyWrackmeyer, B, Univ Bayreuth, Anorgan Chem Lab, Postfach 101251, D-95440 Bayreuth, Germany TI - Synthesis of phosphanes bearing 2-imino-1,3-thiazolidine ligands - X-ray analyses and NMR spectroscopy AB - Pseudo-ephedrine derived 2-imino-1,3-thiazolidine I reacts with tris(diethylamino)phosphane by stepwise replacement of the diethylamino group to give the mono-, bis- and tris(imino)phosphanes 2, 3 and 4, respectively, of which 4 could be isolated in pure state. The analogous reaction with diethylamino-diphenylphosphane affords the imino-di-phenylphosphane 5. The iminophosphanes react with sulfur or selenium to give the corresponding phosphorus(V) compounds. In contrast, the reaction of the iminophosphanes with oxygen is very slow; anhydrous trimethylamine N-oxide reacts in the melt with the phosphanes to give the oxides 4(O) and 5(O). The molecular structures of 4(O) (in mixture with 4), 4(Se), 5(S) and 5(Se) were determined by X-ray analysis. In all cases the ring-sulfur and the phosphorus atoms are in cis-positions at the C=N bonds. The analogous solution structures were determined by H-1, C-13, N-15, P-31 and Se-77 NMR spectroscopy. In the case of the compounds 5, 5(O), 5(S) and 5(Se) the isotope-induced chemical shifts 1 Delta N-14/15(P-31) were determined, using INEPT-HEED experiments MH - Germany MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0044-2313 UR - ISI:000170291000021 L2 - phosphanes;imines;NMR(multinuclear) spectroscopy;crystal structures;POLARIZATION TRANSFER; NATURAL-ABUNDANCE; PULSE SEQUENCE; ENHANCEMENT; PHOSPHORUS; N-15; SE-77 SO - Zeitschrift fur Anorganische und Allgemeine Chemie 2001 ;627(8):1846-1854 2353 UI - 13425 AU - Balachandran AP AU - Martin X AU - O'Connor D AD - Syracuse Univ, Dept Phys, Syracuse, NY 13244, USACINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoBalachandran, AP, Syracuse Univ, Dept Phys, Syracuse, NY 13244, USA TI - Fuzzy actions and their continuum limits AB - Previously matrix model actions for "fuzzy" fields have been proposed using noncommutative geometry. They retained "topological" properties extremely well, being capable of describing instantons, theta -states, the chiral anomaly, and even chiral fermions with no "doubling." Here, we demonstrate that the standard scalar and spinor actions on a d-dimensional manifold are recovered from such actions in the limit of large matrices if their normalizations are correctly scaled as the limit is taken MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 18 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000169549500007 L2 - NONCOMMUTATIVE GEOMETRY; DIRAC OPERATOR; SPHERE SO - International Journal of Modern Physics A 2001 ;16(14):2577-2593 2354 UI - 13394 AU - Balaji KRS AU - Perez-Lorenzana A AU - Smirnov AY AD - Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Math Sci, Taramani 600113, Chennai, IndiaInst Politecn Nacl, Dept Fis, Ctr Invest & Estud Avanzados, Mexico City 07000, DF, MexicoRussian Acad Sci, Inst Nucl Res, Moscow 117312, RussiaBalaji, KRS, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - Large lepton mixings induced by sterile neutrino AB - We assume that the mass matrix of active neutrinos has hierarchical form with small mixings, similar to quark mass matrix. We show that the large mixings between nu (mu) and nu (tau) as well as between nu (l) and certain combination of nu (mu) and nu (tau) required by the present data can appear due to the presence of a sterile neutrino state. Two realizations of this possibility are considered: (i) Large flavor mixing appears as a result of sterile neutrino "decoupling" (m(ss) much greater than m(a)), so that the active-sterile mixings are negligible. (ii) Sterile neutrino has a mass of O(1) eV and its mixing with active neutrinos can be observable. In the second case, the (3 + 1) scheme of neutrino mass, which also accommodates the LSND result, can be reproduced, provided the hierarchy of the mass matrix of active neutrinos is not strong (the ratio of largest to smallest elements is about two orders of magnitude). The enhancement of lepton mixing via coupling with sterile neutrino can be realized in Grand Unified theories with the see-saw mechanism of neutrino mass generation. (C) 2001 Elsevier Science B.V. All rights reserved MH - India MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000169426200015 L2 - ATMOSPHERIC NEUTRINOS; MSW SOLUTIONS; DARK-MATTER; SOLAR; OSCILLATIONS; MASS; MODEL; RENORMALIZATION; REACTOR; SEARCH SO - Physics Letters B 2001 ;509(1-2):111-119 2355 UI - 13045 AU - Ballario P AU - Ornaghi P AU - Lena A AU - De Cinti E AU - Gonzalez A AU - Filetici P AD - Univ Roma La Sapienza, Dipartimento Genet & Biol Mol, I-00185 Rome, ItalyUniv Roma La Sapienza, Ctr Acidi Nucleici, CNR, I-00185 Rome, ItalyUNAM, Dept Mol Genet, Mexico City, DF, Mexico TI - Gcn5 and its bromodomain interactions with histone N-termini MH - Italy MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Microbiology;Mycology U5 - J;Meeting Abstract AV - English IS - 0749-503X UR - ISI:000170442100155 SO - Yeast 2001 ;18():S95-S95 2356 UI - 13881 AU - Ballesteros A AU - Chumakov S AD - Univ Burgos, Dept Fis, Burgos 09001, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoBallesteros, A, Univ Burgos, Dept Fis, Pza Misael Banuelos SN, Burgos 09001, Spain TI - Nonlinear models in quantum optics through quantum algebras AB - The su(q)(2) algebra is shown to provide a natural dynamical algebra for some nonlinear models in Quantum Optics. Applications to the computation of eigenvalues and eigenvectors for the Hamiltonian describing second harmonics generation are proposed MH - Mexico|Jalisco MH - Spain PB - LULEA: NORBERT EULER RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 1402-9251 UR - ISI:000168123800005 SO - Journal of Nonlinear Mathematical Physics 2001 ;8():13-17 2357 UI - 13459 AU - Balog Z AU - Delgado AJ AU - Moitinho A AU - Furesz G AU - Kaszas G AU - Vinko J AU - Alfaro EJ AD - Univ Szeged, Dept Opt & Quantum Elect, H-6720 Szeged, HungaryHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACSIC, Inst Astrofis Andalucia, Granada, SpainUNAM, Inst Astron, Ensenada 22800, BC, MexicoUniv Szeged, Dept Expt Phys, H-6720 Szeged, HungaryBalog, Z, Univ Szeged, Dept Opt & Quantum Elect, Dom Ter 9, H-6720 Szeged, Hungary TI - Fundamental parameters and new variables of the galactic open cluster NGC 7128 AB - CCD photometry in Johnson UBV and Stromgren uvby systems and medium-resolution spectroscopy of the galactic open cluster NGC 7128 are presented. Spectral types of the brightest 12 stars in the cluster field were determined based on equivalent widths of the Hac and the HeI 6678-Angstrom line. The spectroscopic observations also revealed two obvious and one probable Be-type stars showing H alpha emission. The analysis of the photometric diagrams gave a colour excess of E(B - V) = 1.03 +/- 0.06 mag, a distance modulus DM = 13.0 +/- 0.2 mag and an age above 10 Myr. Time-resolved photometric observations obtained on one night resulted in the detection of short time-scale light variations of seven new and three already known variable stars in the cluster field MH - Hungary MH - Mexico|Baja California MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000169352000008 L2 - techniques : photometric;techniques : spectroscopic;stars : variables : other;open clusters and associations : individual : NGC 7128;DIFFUSE INTERSTELLAR BANDS; UVBY-BETA-PHOTOMETRY; MAIN-SEQUENCE STARS; SOUTHERN CLUSTERS; YOUNG; CALIBRATION; MAGNITUDE; CEPHEIDS; SEARCH; RANGE SO - Monthly Notices of the Royal Astronomical Society 2001 ;323(4):872-886 2358 UI - 14139 AU - Balvanera P AU - Daily GC AU - Ehrlich PR AU - Ricketts TH AU - Bailey SA AU - Kark S AU - Kremen C AU - Pereira H AD - Stanford Univ, Dept Biol Sci, Ctr Conservat Biol, Stanford, CA 94305, USAUniv Nacl Autonoma Mexico, Inst Ecol, Morelia, Michoacan, MexicoDaily, GC, Stanford Univ, Dept Biol Sci, Ctr Conservat Biol, Stanford, CA 94305 USA TI - Conserving biodiversity and ecosystem services MH - USA MH - Mexico|Michoacan PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 41 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000167563800001 SO - Science 2001 ;291(5511):2047-2047 2359 UI - 12503 AU - Banaiee N AU - Bodadilla-del-Valle M AU - Bardarov S AU - Riska PF AU - Small PM AU - Ponce-de-Leon A AU - Jacobs WR AU - Hatfull GF AU - Sifuentes-Osornio J AD - Stanford Univ, Sch Med, Div Infect Dis & Geog Med, Stanford, CA 94305, USAInst Nacl Ciencias Med & Nutr, Dept Infect Dis, Mexico City, DF, MexicoAlbert Einstein Coll Med, Howard Hughes Med Inst, Bronx, NY 10467, USAUniv Pittsburgh, Dept Biol Sci, Pittsburgh, PA 15260, USABanaiee, N, Univ Calif San Francisco, Dept Lab Med, L518 Box 0134, San Francisco, CA 94143 USA TI - Luciferase reporter mycobacteriophages for detection, identification, and antibiotic susceptibility testing of Mycobacterium tuberculosis in Mexico AB - The utility of luciferase reporter mycobacteriophages (LRPs) for detection, identification, and antibiotic susceptibility testing of Mycobacterium tuberculosis was prospectively evaluated in a clinical microbiology laboratory in Mexico City, Mexico. Five hundred twenty-three consecutive sputum samples submitted to the laboratory during a 5-month period were included in this study. These specimens were cultivated in Middle-brook 7H9 (MADC), MGIT, and Lowenstein-Jensen (LJ) media. Of the 71 mycobacterial isolates recovered with any of the three media, 76% were detected with the LRPs, 97% were detected with the MGIT 960 method, and 90% were detected with LJ medium. When contaminated specimens were excluded from the analysis, the LRPs detected 92% (54 of 59) of the cultures. The median time to detection of bacteria was 7 days with both the LRPs and the MGIT 960 method. LRP detection of growth in the presence of p-nitro-alpha -acetylamino-beta -hydroxypropiophenone (NAP) was used for selective identification of M. tuberculosis complex (MTC) and compared to identification with BACTEC 460. Using the LRP NAP test, 47 (94%) out of 50 isolates were correctly identified as tuberculosis complex. The accuracy and speed of LRP antibiotic susceptibility testing with rifampin, streptomycin, isoniazid, and ethambutol were compared to those of the BACTEC 460 method, and discrepant results were checked by the conventional proportion method. In total, 50 MTC isolates were tested. The overall agreement between the LRP and BACTEC 460 results was 98.5%. The median LRP-based susceptibility turnaround time was 2 days (range, 2 to 4 days) compared to 10.5 days (range, 7 to 16 days) by the BACTEC 460 method. Phage resistance was not detected in any of the 243 MTC isolates tested. Mycobacteriophage-based approaches to tuberculosis diagnostics can be implemented in clinical laboratories with sensitivity, specificity, and rapidity that compare favorably with those of the MGIT 960 and BACTEC 460 methods. The phages currently provide the fastest phenotypic assay for susceptibility testing MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 23 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000171934200011 L2 - GROWTH INDICATOR TUBE; RESISTANT TUBERCULOSIS; MULTICENTER EVALUATION; RECOVERY; SYSTEM SO - Journal of Clinical Microbiology 2001 ;39(11):3883-3888 2360 UI - 12951 AU - Banaszak AT AU - Trench RK AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Cancun Q Roo 77500, MexicoUniv Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106, USABanaszak, AT, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Apartado Postal 1152, Cancun Q Roo 77500, Mexico TI - Ultraviolet sunscreens in dinoflagellates MH - Mexico|Quintana Roo MH - USA PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Editorial Material AV - English IS - 1434-4610 UR - ISI:000170653600001 L2 - UV-B RADIATION; AMINO-ACIDS MAAS; MICROALGAL-INVERTEBRATE SYMBIOSES; CORAL POCILLOPORA-DAMICORNIS; GREAT-BARRIER-REEF; ABSORBING COMPOUNDS; MARINE ORGANISMS; OXIDATIVE STRESS; ANTHOPLEURA-ELEGANTISSIMA; ANTARCTIC PHYTOPLANKTON SO - Protist 2001 ;152(2):93-101 2361 UI - 11899 AU - Banhart F AU - Grobert N AU - Terrones M AU - Charlier JC AU - Ajayan PM AD - Univ Ulm, ZE Elektronenmikroskopie, D-89069 Ulm, GermanyUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandIPICYT, San Luis Potosi 78210, MexicoUniv Catholique Louvain, Unite PCPM, B-1348 Louvain, BelgiumRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USABanhart, F, Univ Ulm, ZE Elektronenmikroskopie, D-89069 Ulm, Germany TI - Metal atoms in carbon nanotubes and related nanoparticles AB - The paper reviews the present state of research in the field of metal-carbon nanocomposites and the interaction of metal atoms with graphitic structures. Metal crystals can be encapsulated within graphitic shells of cylindrical, spherical, or other geometry. Various chemical and physical production methods to generate metal containing carbon nanotubes and possible microscopic formation mechanisms axe presented. In this context, the role of metals as catalysts in the formation of single-walled carbon nanotubes is discussed. The interaction of metal atoms with the graphitic lattice is of particular interest. In situ electron microscopy is used to study the behaviour of individual metal atoms in a graphitic lattice. Furthermore, novel nanostructures can be generated under electron irradiation. Finally, an overview of theoretical studies using molecular dynamics and tight binding calculations of the carbon-metal interaction is given MH - Belgium MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 26 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Review AV - English IS - 0217-9792 UR - ISI:000173540600001 L2 - LARGE-SCALE SYNTHESIS; BINDING MOLECULAR-DYNAMICS; CHEMICAL-VAPOR-DEPOSITION; THIN-FILMS; MAGNETIC-PROPERTIES; ARC-DISCHARGE; ELECTRON-IRRADIATION; FORMATION MECHANISM; GRAPHITE NANOTUBES; ENCAPSULATED C-60 SO - International Journal of Modern Physics B 2001 ;15(31):4037-4069 2362 UI - 13920 AU - Barber A AU - Tun J AU - Crespo MB AD - Univ Alicante, Dept Ciencias Ambientales & Recursos Nat, E-03080 Alicante, SpainUniv Autonoma Yucatan, Fac Med Vet Zootecn, Dept Bot, Merida, Yucatan, MexicoBarber, A, Univ Alicante, Dept Ciencias Ambientales & Recursos Nat, Ap Correos 99, E-03080 Alicante, Spain TI - A new approach on the bioclimatology and potential vegetation of the Yucatan Peninsula (Mexico) AB - Results of the application of Rivas-Martinez's Bioclimatic Classification System to the Mexican part of the Yucatan Peninsula are presented. A total of 140 meteorological stations were assigned to bioclimatic belts/zones regarding temperature and rainfalls. After these assignments a bioclimatic characterisation of the Peninsula into two major bioclimates (Xeric Tropical and Pluvistational Tropical) is proposed. Based on the bioclimatic results a phytosociological study has been carried out to typify the forest potential vegetation found in each bioclimatic zone. The Braun-Blanquet approach has been used to define the plant communities and superior syntaxa. A new order (Acacio dolichostachyae-Burseretalia simarubae), two new alliances (Colubrino yucatanensis-Burserion simarubae and Mammillario gaumeri-Prosopion juliflorae), two new associations (Colubrino yucatanensis-Burseretum simarubae and Mammillario gaumeri-Prosopetum juliflorae) and one new subassociation (manilkaretosum zapotae) are stated. According to the bioclimatic and phytosociological results three new chorological Subsectors (Progresian Subsector, Yucatanian Subsector and Petenian Subsector) are proposed in the Yucatanian Sector MH - Mexico|Yucatan MH - Spain PB - STUTTGART: GEBRUDER BORNTRAEGER RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0340-269X UR - ISI:000167963200001 L2 - phytosociology;bioclimatology;syntaxonomy;endemism;Yucatan;Caribbean-Mesoamerican area;Bursera simaruba;Mammillaria gaumeri;Acacia dolichostachya;Manilkara zapota;Prosopis juliflora SO - Phytocoenologia 2001 ;31(1):1-31 2363 UI - 12165 AU - Barea J AU - Bijker R AU - Frank A AU - Loyola G AD - Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoBarea, J, Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, Apdo 1065, E-41080 Seville, Spain TI - Single-particle transfer and nuclear supersymmetry AB - Transfer reactions constitute a stringent test for nuclear supersymmetry, a theory that simultaneously describes neighboring nuclei with bosonic and fermionic character. We construct and analytically evaluate one-nucleon transfer matrix elements between supersymmetric partners with the U(6/4) case as, in example. and stress the need for a careful treatment of bosonic and fermionic operators in the construction of mixed tensor operators MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000172733000021 L2 - BOSON-FERMION MODEL; COLLECTIVE STATES; AU-196; PT-195; LIMIT SO - Physical Review C 2001 ;64(6): 2364 UI - 13234 AU - Barioli F AU - Facchini A AU - Raggi F AU - Rios J AD - Univ Padua, Dipartimento Matemat Pura & Applicata, I-35131 Padua, ItalyUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoBarioli, F, Univ Padua, Dipartimento Matemat Pura & Applicata, Via Belzoni 7, I-35131 Padua, Italy TI - Krull-Schmidt Theorem and homogeneous semilocal rings AB - The aim of this paper is to study the modules M with a finite direct sum decomposition M = M-1 circle plus (...) circle plus M-n such that all the endomorphism rings End(Mi) are homogeneous semilocal. In particular, we find complete results about the uniqueness of such decompositions (Krull-Schmidt Theorem) MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000170043000018 L2 - MODULES SO - Communications in Algebra 2001 ;29(4):1649-1658 2365 UI - 13691 AU - Barkovich M AU - Casini H AU - D'Olivo JC AU - Montemayor R AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Oxford, Oxford OX1 3NP, EnglandUniv Nacl Cuyo, Inst Balseiro, RA-8400 Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, CAB, RA-8400 Bariloche, Rio Negro, ArgentinaCNEA, RA-8400 Bariloche, Rio Negro, ArgentinaBarkovich, M, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Ap Postal 70-543, Mexico City 04510, DF, Mexico TI - Pulsar motions from neutrino oscillations induced by a violation of the equivalence principle AB - We analyze a possible explanation of the pulsar motions in terms of resonant neutrino transitions induced by a violation of the equivalence principle (VEP). Our approach, based on a parametrized post-Newtonian (PPN) expansion, shows that VEP effects give rise to highly directional contributions to the neutrino oscillation length. These terms induce anisotropies in the linear and angular momentum of the emitted neutrinos, which can account for both the observed translational and rotational pulsar motions. The violation needed to produce the actual motions is completely compatible with the existing bounds. (C) 2001 Published by Elsevier Science B.V MH - Argentina MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000168579900004 L2 - HIGH STATISTICS SEARCH; MAGNETIC-FIELD; VELOCITIES; KICKS; SUPERNOVA SO - Physics Letters B 2001 ;506(1-2):20-26 2366 UI - 13547 AU - Barman SR AU - Haberle P AU - Horn K AU - Maytorena JA AU - Liebsch A AD - Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, GermanyInter Univ Consortium, Indore 452001, Madhya Pradesh, IndiaUniv Tecn Federico Santa Maria, Valparaiso, ChileUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoKFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, D-52425 Julich, GermanyBarman, SR, Max Planck Gesell, Fritz Haber Inst, Faradayweg 4-6, D-14195 Berlin, Germany TI - Quantum well behavior without confining barrier observed via dynamically screened photon field AB - Angle-resolved photoemission spectra from Na adlayers on Al(111) reveal features which behave like quantum well resonances although the substrate provides no confining barrier. These features are observed in a narrow photon energy range where overlayer collective excitations cause resonant enhancement of the photoemission intensity. The quantum well behavior is shown to be due to surface resonances of the Na/Al system. The resonances are observable using photoemission because of spatial confinement and dynamical enhancement of the local electric field within the: Na films MH - Chile MH - Germany MH - India MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000169013600033 L2 - VALENCE-ELECTRON STATES; THIN METAL OVERLAYERS; PLASMON EXCITATIONS; BAND-STRUCTURE; NA OVERLAYERS; CU-FILMS; PHOTOEMISSION; RESONANCES; LAYERS; AG SO - Physical Review Letters 2001 ;86(22):5108-5111 2367 UI - 13876 AU - Barnes DG AU - Staveley-Smith L AU - de Blok WJG AU - Oosterloo T AU - Stewart IM AU - Wright AE AU - Banks GD AU - Bhathal R AU - Boyce PJ AU - Calabretta MR AU - Disney MJ AU - Drinkwater MJ AU - Ekers RD AU - Freeman KC AU - Gibson BK AU - Green AJ AU - Haynes RF AU - Hekkert PTL AU - Henning PA AU - Jerjen B AU - Juraszek S AU - Kesteven MJ AU - Kilborn VA AU - Knezek PM AU - Koribalski B AU - Kraan-Korteweg RC AU - Malin DE AU - Marquarding M AU - Minchin RF AU - Mould JR AU - Price RM AU - Putman ME AU - Ryder SD AU - Sadler EM AU - Schroder A AU - Stootman F AU - Webster RL AU - Wilson WE AU - Ye T AD - CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaSwinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, AustraliaNetherlands Fdn Res Astron, NL-7990 AA Dwingeloo, NetherlandsUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandUniv Wales, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, WalesUniv Western Sydney Macarthur, Dept Phys, Campbelltown, NSW 2560, AustraliaUniv Bristol, Dept Phys, Bristol BS8 1TL, Avon, EnglandUniv Melbourne, Sch Phys, Melbourne, Vic, AustraliaAustralian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USASpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoAnglo Australian Observ, Epping, NSW 1710, AustraliaObserv Cote Azur, F-06304 Nice 4, FranceBarnes, DG, Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia TI - The HI Parkes All Sky Survey: southern observations, calibration and robust imaging AB - The acquisition of HI Parkes All Shy Survey (HIPASS) southern sky data commenced at the Australia Telescope National Facility's Parkes 64-m telescope in 1997 February, and was completed in 2000 March. HIPASS is the deepest HI survey yet of the sky south of declination +2 degrees, and is sensitive to emission out to 170 h(75)(-1) Mpc. The characteristic root mean square noise in the survey images is 13.3 mJy. This paper describes the survey observations, which comprise 23 020 eight-degree scans of 9-min duration, and details the techniques used to calibrate and image the data. The processing algorithms are successfully designed to be statistically robust to the presence of interference signals, and are particular to imaging point (or nearly point) sources. Specifically, a major improvement in image quality is obtained by designing a median-gridding algorithm which uses the median estimator in place of the mean estimator MH - Australia MH - United Kingdom MH - France MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 124 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000168126300005 L2 - instrumentation : detectors;methods : observational;methods : statistical;techniques : image processing;surveys;radio lines : galaxies;RECEIVER SO - Monthly Notices of the Royal Astronomical Society 2001 ;322(3):486-498 2368 UI - 12253 AU - Barot M AU - Schroer J AD - Univ Nacl Autonoma Mexico, Math Inst, Mexico City 04510, DF, MexicoUniv Leeds, Dept Pure Math, Leeds LS2 9JT, W Yorkshire, EnglandBarot, M, Univ Nacl Autonoma Mexico, Math Inst, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Module varieties over canonical algebras AB - The main purpose of this paper is the study of module varieties over the class of canonical algebras, providing a rich source of examples of varieties with interesting properties. Our main tool is a stratification of module varieties, which was recently introduced by Richmond. This stratification does not require a precise knowledge of the module category. If it is finite, then it provides a method to classify irreducible components. We determine the canonical algebras for which this stratification is finite. In this case, we describe the algorithm for calculating the dimension of the variety and the number of irreducible components of maximal dimension. For an infinite family of examples we give easy combinatorial criteria for irreducibility, Cohen-Macaulay and normality. (C) 2001 Elsevier Science MH - United Kingdom MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000172577900005 L2 - TAME ALGEBRAS SO - Journal of Algebra 2001 ;246(1):175-192 2369 UI - 12749 AU - Barrado E AU - Prieto F AU - Lozano B AU - Arenas FJ AU - Medina J AD - Univ Valladolid, Dept Quim Analit, E-47005 Valladolid, SpainUniv Valladolid, Dept Fis Mat Condensada Cristalog & Mineral, E-47005 Valladolid, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoBarrado, E, Univ Valladolid, Dept Quim Analit, E-47005 Valladolid, Spain TI - Removal of H2S by metal ferrites produced in the purification of metal-bearing waste water. Study of the reaction mechanism AB - Waste water polluted with heavy metals can be successfully purified by precipitation of the metals from an alkaline solution containing iron (II), giving rise to a ferrite sludge. The solid metal ferrites obtained in this manner can be used to remove hydrogen sulphide from a gas stream. Based on a Taguchi experimental design, ferrite solid particle and pore size, and the temperature resulting in maximum retention of H2S by the solid were optimised. Under the optimum conditions, predicted by the method, each gram of ferrite was able to retain 0.274 g H2S. In addition, a ferrite containing a known lead concentration, obtained by the precipitation method under optimal conditions of pH, temperature and Fe/Pb ratio, was used to study the exothermic H2S retention reaction. The chemical reaction occurring between the ferrite and the H2S was investigated by characterisation of the compounds before (Pb0.04Fe0.96II (Fe2O4)-O-III. nH(2)O solids composed of PbxFe3-xO4, magnetite Fe3O4 and hydrated lead oxide PbOn.H2O) and after (PbS, PbSO4, S, FeS2 and alpha -FeO(OH)) the retention process MH - Mexico|Hidalgo MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000171302500021 L2 - ferrites;hydrogen sulphide retention;Taguchi experimental design;reaction mechanism;TAGUCHI EXPERIMENTAL-DESIGN; OXIDE SORBENTS; OPTIMIZATION SO - Water Air and Soil Pollution 2001 ;131(1-4):367-381 2370 UI - 13917 AU - Barrado E AU - Prieto F AU - Medina J AU - Pardo R AD - Fac Ciencias, Dept Chim Analit, Valladolid 47005, SpainFac Ciencias, Dept Fis Mat Condensada Cristalog & Mineral, Valladolid 47005, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoBarrado, E, Fac Ciencias, Dept Chim Analit, Valladolid 47005, Spain TI - Purification of cadmium wastewater: characterization and electrochemical behaviour of cadmium-bearing ferrites AB - This investigation was designed to the verify the efficiency of the "ferrite process" for the purification of waste-water heavily contaminated with cadmium and to characterize the cadmium bearing-ferries produced using five starting Fe2+/Cd2+ molar retios (20/1, 15/1, 7/1, 5/1 and 3/1). The five ferrite products were subjected to XRF, chemical analysis (CIP-AES and potentiometric titration), XRD and DSC, indicating CdxFe(II) (Fe2O4)-O-III (x = 0.04, 0.06, 0.15, 0.25 and 0.33 respectively) as the most probable structure. Accordingly, the general formation reaction proposed for these compounds is: (2 + (1 - x)) Fe2+ x xCd(2+) + 4 OH- + O-2 --> Cd-x (Fe1-xFe2O4)-Fe-II-O-III + 2 H2O. Electrochemical analysis of the solid cadmium ferrites was performed using a carbon paste electrode in HClO4 and HCl medium. In each case, the first cyclic-voltammogram showed the participation of solid species in the electrochemical transformation process. since the shape of the spectra could be related to the structure and stoichiometry of the ferrites. In second and successive scans, the vollammograms indicated the redox complex Fe-ads(3+) + 1 e(-) double left right arrow Fe2+ (ads) (E = -0.525 V vs. AgCl, Ag) and Cd2+ + 2 e double left right arrow Cd (s) (E = -0.700) in HClO4, and FeCl2+ (ads) + 1 e(-) double left right arrow FeCl+ (ads) + Cl- (E=0.475 V) and CdClx(x-2) + 2 e(-) double left right arrow Cd(s) + x Cl- (E = -0.750 V) in HCl. Chronopotentiometric data were consistent with these mechanisms MH - Mexico|Hidalgo MH - Spain PB - BARCELONA: ELSEVIER INFORMACION PROFESSIONAL, S A RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0212-0569 UR - ISI:000168013800006 L2 - cadmium;decontamination;cadmium-ferrites;voltammetry;carbon paste electrode;CARBON-PASTE ELECTRODE; WATER; PRECIPITATION SO - Quimica Analitica 2001 ;20(1):47-53 2371 UI - 12812 AU - Barranco AP AU - Pinar FC AU - Martinez OP AU - Garcia ET AU - Huanosta-Tera A AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv La Habana, Fac Fis, Inst Mat & React, Havana 10400, CubaHuanosta-Tera, A, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - a.c. conductivity behavior of a hot pressed [PbTiO3-PbZrO3-PbCuNbO3] ferroelectric ceramic AB - The temperature dependence of electric parameters of the sintered compound PbZr0.5TiU.44(Cu1/4Nb3/4)(0.06)O-3 + 0.5 mol% MnO2 was investigated using a.c. measurements. The temperature dependence of the a.c. conductivity in the vicinity of T-c is highly non-linear with a local maximum in conductivity observed at that temperature. The total conductivity cr,(co), as a function of frequency, exhibits a power law dependence (ao + AV), whose exponents is maximized at the ferro-paraelectric transition. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6454 UR - ISI:000171249000016 L2 - a.c. conductivity;hot pressing;ceramic;ferroelectricity;dielectric permittivity;AC MEASUREMENTS SO - Acta Materialia 2001 ;49(16):3289-3293 2372 UI - 12924 AU - Barranco AP AU - Pinar FC AU - Martinez OP AD - Univ La Habana, Fac Fis, Inst Mat & React, Havana 10400, CubaCICATA, Altamira, Tamps, MexicoBarranco, AP, Univ La Habana, Fac Fis, Inst Mat & React, Havana 10400, Cuba TI - PLZT ferroelectric ceramics on the morphotropic boundary phase. Study as possible pyroelectric sensors AB - PLZT compositions near the morphotropic boundary phase (Zr/Ti = 53/47) were studied changing the lanthanum fraction from 0.5 to 14 at%. The grain size and the porosity due to the lanthanum addition showed an important influence on the dielectric properties of the samples. Dielectric and pyroelectric studies show that the ceramics of lower lanthanum concentrations are suitable materials for practical applications. The ceramic's response subjected to light radiation was investigated. The radiation is absorbed near the material surface and its temperature rises leading to a change in the electrical polarization of the bulk material. This phenomenon is analyzed and correlated with the absorbed light on the surface of the material MH - Cuba MH - Mexico|Tamaulipas PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000170844500014 L2 - RHOMBOHEDRAL PB(ZR1-XTIX)O-3 CERAMICS; LANTHANUM MODIFICATION; BEHAVIOR SO - Physica Status Solidi A-Applied Research 2001 ;186(3):479-485 2373 UI - 14147 AU - Barranco AP AU - Pinar FC AU - Martinez P AU - Garcia ET AD - Univ La Habana, Fac Fis, Inst Mat & Reactivos, La Habana 10400, CubaCICATA, Altamira, Altamira Tamps, MexicoUniv La Habana, Fac Quim, Inst Mat & Reactivos, La Habana 10400, CubaBarranco, AP, Univ La Habana, Fac Fis, Inst Mat & Reactivos, San Lazaro & L, La Habana 10400, Cuba TI - Effects of MnO2 additive on the properties of PbZrO3-PbTiO3-PbCu1/4Nb3/4O3 ferroelectric ceramic system AB - The modifications (soft or hard doping) in lead zirconate titanate ceramics (PZT) lead to the creation of undesirable stoichiometric defects due to a lack of compensation in some of the components. Frequently, the complexed doping (with two or more elements) is used in order to obtain better results on PZT ceramics than that of single doping. We have investigated the PbZr0.50Ti0.44(Cu1/4Nb3/4)(0.06)(PZT=PCN), a ferroelectric ternary system where copper and niobium ions replace the Zr4+ or Ti4+ in B sites of the structure. The effects of MnO2 additions on the piezo and ferro-electric properties have been studied. We have analyzed the ac response of both undoped and doped PZT-PCN ceramic samples in a wide temperature range, especially above the Curie point. The MnO2 addition did not change the Curie temperature of the system and higher resistivity values have been observed in MnO2 doped ceramics which could be associated to the substitution of copper by manganese ions in the B-sites of the perovskite structure. At the same poling conditions, the electromechanical coupling factors were relatively lower in doped ceramics and the mechanical quality factor gave us an important difference between undoped and doped PZT-PCN system (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Tamaulipas PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000167481900010 L2 - doping;ferroelectric properties;impedance spectroscopy;Pb(Zr,Ti,Cu,Nb)O-3;PZT;TEMPERATURE-PROGRAMMED REDUCTION SO - Journal of the European Ceramic Society 2001 ;21(4):523-529 2374 UI - 13677 AU - Barrera-Cortes J AU - Astruc JP AU - Tufeu R AU - Martinez-Enriquez AM AD - CINVESTAV, Dept Biotechnol & Bioengn, Mexico City 07300, DF, MexicoUniv Paris 13, Inst Galilee, CNRS, Lab Ingn Mat & Hautes Press, F-93430 Villetaneuse, FranceCINVESTAV, Dept Elect Engn, Mexico City 14000, DF, MexicoBarrera-Cortes, J, CINVESTAV, Dept Biotechnol & Bioengn, Av Inst Politecn Nacl 2508,Col San Pedro Zacatenc, Mexico City 07300, DF, Mexico TI - Knowledge base specification to automate the fluid critical point of fluids AB - In this paper an analytical procedure implemented to structure the knowledge required by an expert system applied for controlling a chemical process is described. The analytical approach is based on Lifecycle of Systems and on Task Model approaches. It was validated with an experimental procedure related to the determination of the critical point of pure fluids (Co-2,Co- N2O, SF6) and mixtures of low concentration (CO2-limonene). For the implementation of the control system an expert shell (CHRONOS (TM)) was used MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0883-9514 UR - ISI:000168847700002 L2 - PHASE-EQUILIBRIA; EXPERT SYSTEMS; FRAMEWORK; MIXTURES; DESIGN SO - Applied Artificial Intelligence 2001 ;15(5):453-470 2375 UI - 13213 AU - Barriga J AU - Gaztanaga E AU - Santos MG AU - Sarkar S AD - Univ Oxford, Dept Phys, Oxford OX1 3NP, EnglandINAOE, Puebla 7200, MexicoCSIC, Inst Estud Espacials Catalunya, Barcelona 08034, SpainBarriga, J, Univ Oxford, Dept Phys, 1 Keble Rd, Oxford OX1 3NP, England TI - On the APM power spectrum and the CMB anisotropy: evidence for a phase transition during inflation? AB - Adams et al. have noted that according to our current understanding of the unification of fundamental interactions, there should have been phase transitions associated with spontaneous symmetry breaking during the inflationary era. This may have resulted in the breaking of scale-invariance of the primordial density perturbation for brief periods. A possible such feature was identified in the power spectrum of galaxy clustering in the automated plate measurement (APM) survey at the scale k similar to 0.1 h Mpc (- 1) and it was shown that the secondary acoustic peaks in the power spectrum of the cosmic microwave background (CMB) anisotropy should consequently be suppressed. We demonstrate that this prediction is confirmed by the recent Boomerang and Maxima observations, which favour a step-like spectral feature in the range k similar to (0.06-0.6) h Mpc (- 1), independently of the similar previous indication from the APM data. Such a spectral break enables an excellent fit to both APM and CMB data with a baryon density consistent with the big bang nucleosynthesis (BBN) value. It also allows the possibility of a matter-dominated universe with zero cosmological constant, which we show can now account for even the evolution of the abundance of rich clusters MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 39 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0035-8711 UR - ISI:000170033400019 L2 - cosmic microwave background;cosmological parameters;early Universe;large-scale structure of Universe;LARGE-SCALE STRUCTURE; PRIMORDIAL LITHIUM ABUNDANCE; GALAXY CORRELATION-FUNCTIONS; DARK-MATTER MODELS; LY-ALPHA FOREST; COSMOLOGICAL CONSTANT; BACKGROUND-RADIATION; DEUTERIUM ABUNDANCE; MASS FLUCTUATIONS; ADIABATIC PERTURBATIONS SO - Monthly Notices of the Royal Astronomical Society 2001 ;324(4):977-987 2376 UI - 13981 AU - Barriga J AU - Gaztanaga E AU - Santos MG AU - Sarkar S AD - CSIC, Inst Ciencies Espai, IEEC, ES-08034 Barcelona, SpainINAOE Astrofis, Puebla 7200, MexicoUniv Oxford, Oxford OX1 3NP, EnglandBarriga, J, CSIC, Inst Ciencies Espai, IEEC, Edf Nexus 201,C Gran Capita 2-4, ES-08034 Barcelona, Spain TI - Evidence for an inflationary phase transition from the LSS and CMB anisotropy data AB - In the light of the recent Boomerang and Maxima observations of the CMB which show an anomalously low second acoustic peak, we reexamine the prediction by Adams et al (1997) that this would be the consequence of a 'step' in the primordial spectrum induced by a spontaneous symmetry breaking phase transition during primordial inflation. We demonstrate that a deviation from scale-invariance around k similar to 0.1 h Mpc(-1) can simultaneously explain both the feature identified earlier in the APM galaxy power spectrum as well the recent CMB anisotropy data, with a baryon density consistent with the BBN value. Such a break also allows a good fit to the data on cluster abundances even for a critical density matter-dominated universe with sere cosmological constant MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000167811600014 L2 - POWER SPECTRUM; ENTROPY CRISIS; SUPERNOVAE; OMEGA SO - Nuclear Physics B-Proceedings Supplements 2001 ;95():66-69 2377 UI - 12102 AU - Baruch I AU - Flores JM AU - Thomas F AU - Garrido R AD - IPN, CINVESTAV, Mexico City 07360, DF, MexicoUPC, IRI, Barcelona, SpainBaruch, I, IPN, CINVESTAV, Ave IPN 2508,AP 14470, Mexico City 07360, DF, Mexico TI - Adaptive neural control of nonlinear systems AB - The aim of the present paper is to integrate a recurrent neural network in two schemes of real-time soft computing neural control. There are applied the following control schemes: an indirect and a direct trajectory tracking control, using the state and parameter information, given by an identification recurrent neural network MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000173024600127 L2 - NETWORKS SO - Artificial Neural Networks-Icann 2001, Proceedings 2001 ;2130():930-936 2378 UI - 12948 AU - Basanez MG AU - Ricardez-Esquinca J AD - Univ London Imperial Coll Sci Technol & Med, Sch Med, Dept Infect Dis Epidemiol, London W2 1PG, EnglandUniv Autonoma Chiapas, Unidad Invest Enfermedades Trop, Tuxtla Gutierrez 29000, Chiapas, MexicoBasanez, MG, Univ London Imperial Coll Sci Technol & Med, Sch Med, Dept Infect Dis Epidemiol, St Marys Campus,Norfolk Pl, London W2 1PG, England TI - Models for the population biology and control of human onchocerciasis AB - The absence of animal models in which to reproduce successfully the complete life cycle of Onchocerca volvulus has hindered progress towards unravelling the processes involved in the regulation of parasite abundance in the vertebrate host. Mathematical frameworks have been developed to explore the consequences of such processes in determining parasite population dynamics and the effect on these of control interventions. Post-control predictions are strongly influenced by the assumptions concerning the reproductive life span of the adult female worm (the longest-lived parasite stage) and the distribution of its survival times, and this notion is important to all frameworks. Here, we review the development of models concerning onchocerciasis and discuss the various approaches that have been used, presenting a deterministic framework with parameter values estimated from the Mexican onchocerciasis control programme. This model is used to evaluate interventions combining the removal of adult worms (nodulectomy) and the microfilaricidal and possibly sterilizing effect of ivermectin MH - United Kingdom MH - Mexico|Chiapas PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 22 U4 - Parasitology U5 - J;Review AV - English IS - 1471-4922 UR - ISI:000170754500009 L2 - DENSITY-DEPENDENT PROCESSES; CONTROL PROGRAM; WEST-AFRICA; SIMULIID VECTOR; TRANSMISSION; VOLVULUS; IVERMECTIN; DYNAMICS; MICROFILARIAE; MIGRATION SO - Trends in Parasitology 2001 ;17(9):430-438 2379 UI - 11947 AU - Baschek B AU - Send U AU - Lafuente JG AU - Candela J AD - Inst Ocean Sci, Sidney, BC V8L 4B2, CanadaCtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Malaga, Dept Appl Phys 2, Malaga 29071, SpainInst Meereskunde Ozeanzirkulat & Klima, D-24105 Kiel, GermanyBaschek, B, Inst Ocean Sci, 9860 W Saanich Rd, Sidney, BC V8L 4B2, Canada TI - Transport estimates in the Strait of Gibraltar with a tidal inverse model AB - To estimate the volume transport through the Strait of Gibraltar and to study the spatial structure of the time-variable flow, a varying number of current meter moorings were maintained at the eastern entrance of the strait between October 1994 and April 1998, and was complemented with intensive shipboard measurements during the European Union project Canary Island Azores Gibraltar Experiment (CANIGO). A tidal inverse model is used to merge these data sets in order to investigate the flow at the eastern entrance of the strait. The two-dimensional structure of the tidal flow was described by simple analytical functions. Harmonics with the seven most important tidal frequencies were used as temporal functions. With this model, the tidal currents can be predicted for any time and location at the eastern entrance of the strait, and more than 92% of the variance of the lower layer flow is explained. It was used to remove the tidal currents from the individual measurements and to calculate the mean flow through the strait from the residuals. Combined with a similar inverse model for determining the depth of the interface between Mediterranean and Atlantic water, the volume transport was estimated to be 0.81 +/- 0.07 Sv for the upper layer and -0.76 +/- 0.07 Sv for the lower layer. The correlation of the tidal currents and the fluctuations of the interface accounts for similar to7% of the transport at the eastern entrance MH - Canada MH - Germany MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000173402400008 L2 - MAXIMAL 2-LAYER EXCHANGE; CONTRACTION; FLOW SO - Journal of Geophysical Research-Oceans 2001 ;106(C12):31033-31044 2380 UI - 12384 AU - Bashir A AU - Delbourgo R AU - Roberts ML AD - Univ Tasmania, Sch Math & Phys, Hobart, Tas 7001, AustraliaUniv Michoacana, Morelia, Michoacan, MexicoBashir, A, Univ Tasmania, Sch Math & Phys, Hobart, Tas 7001, Australia TI - Multidimensional phase space and sunset diagrams AB - We derive expressions for the phase space of a particle of momentum p decaying into N particles, that are valid for any number of dimensions. These are the imaginary parts of so-called "sunset" diagrams, which we also obtain. The results are given as a series of hypergeometric functions, which terminate for odd dimensions and are also well suited for deriving the threshold behavior. (C) 2001 American Institute of Physics MH - Australia MH - Mexico|Michoacan PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000172203200004 L2 - MODIFIED BESSEL-FUNCTIONS; FEYNMAN DIAGRAMS; THRESHOLD EXPANSION; INTEGRALS SO - Journal of Mathematical Physics 2001 ;42(12):5553-5564 2381 UI - 14076 AU - Basiuk VA AU - Navarro-Gonzalez R AU - Benilan Y AU - Raulin F AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoUniv Paris 12, UMR CNRS 7583, Lab Interuniv Syst Atmospher, F-94010 Creteil, FranceUniv Paris 07, F-94010 Creteil, FranceBasiuk, VA, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Circuito Exterior CU,A Postal 70-543, Mexico City 04510, DF, Mexico TI - PM3, AM1, MNDO and MINDO3 semi-empirical IR spectra simulations for compounds of interest for Titan's chemistry: diazomethane, methyl azide, methyl isocyanide, diacetylene and triacetylene AB - Four semi-empirical methods (PM3, AM1, MNDO and MINDO3) have been tested to find the best auxiliary tool for the gas chromatography/Fourier transform IR spectroscopy/mass spectrometry (GC/FTIR/MS) identification of five compounds of interest for Titan's atmospheric chemistry as test compounds: diacetylene, triacetylene, diazomethane, methyl azide, methyl isocyanide. Of the four methods, MINDO3 can be considered as the most appropriate method to facilitate the identification of such and similar compounds, since (1) the simulated IR spectra best match the experimental spectra for four compounds of five studied; and (2) MINDO3 provides the best linearity between the calculated and experimental frequencies (correlation coefficient of 0.995; a scaling factor of 0.84 can be applied to afford better correspondence between the calculated and experimental wavenumbers). None of the semi-empirical methods tested is able to predict (even approximately) infrared band intensities, and therefore a spectral intensity pattern. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000167539500014 L2 - titan;semi-empirical;diacetylene;triacetylene;diazomethane;methyl azide;methyl isocyanide;SPECTROSCOPY MASS-SPECTROMETRY; 250-4300 CM(-1) REGION; BAND INTENSITIES; AMINO-ACIDS; IDENTIFICATION; PRODUCTS; ATMOSPHERE; CONDENSATION; PYROLYSIS; AEROSOLS SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2001 ;57(3):505-511 2382 UI - 13790 AU - Bastidas CL AU - Liebsch A AU - Mochan RL AD - KFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, D-52425 Julich, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoBastidas, CL, KFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, Postfach 1913, D-52425 Julich, Germany TI - Influence of d electrons on the dispersion relation of Ag surface plasmons for different single-crystal faces AB - The surface plasmon dispersion relation of Ag is calculated for different single-crystal orientations. To describe the dynamical response properties of both delocalized 5s electrons and more tightly bound 4d electrons, the jellium model is combined with the so-called dipolium model, in which the occupied Ag d bands are represented in terms of polarizable spheres located at the sites of a semi-infinite fee lattice. The nonlocal susceptibility characterizing the s electron response in the surface region is derived using density functional theory. The screening of the Coulomb interaction between conduction electrons via the lattice of dipoles, and of the dipole interaction via the surrounding sea of conduction electrons, is treated self-consistently. Electron energy loss spectra are calculated for all three low-index faces. The surface plasmon energy is found to increase with parallel wave vector for all cases. The magnitude of the positive slope depends on the crystal orientation and, for Ag(110), on the propagation direction. These results are in qualitative agreement with electron energy loss measurements MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000168343400087 L2 - SIMPLE METALS; CORE POLARIZATION; OPTICAL REFLECTANCE; DIELECTRIC RESPONSE; NOBLE-METALS; ELS-LEED; AG(110); ENERGY; EXCITATIONS; ANISOTROPY SO - Physical Review B 2001 ;63(16): 2383 UI - 13954 AU - Batista CVF AU - Scaloni A AU - Rigden DJ AU - Silva LR AU - Romero AR AU - Dukor R AU - Sebben A AU - Talamo F AU - Bloch C AD - CNR, Ctr Int Serv Spettrometria Massa, IABBAM, I-80147 Naples, ItalyUniv Brasilia, Inst Biol, BR-70910900 Brasilia, DF, BrazilEMBRAPA, Cenargen, BR-70849970 Brasilia, DF, BrazilNatl Autonomous Univ Mexico, UNAM, Inst Chem, Mexico City, DF, MexicoVysis Inc, Downers Grove, IL 60515, USAUniv Brasilia, Inst Chem, BR-70910900 Brasilia, DF, BrazilScaloni, A, CNR, Ctr Int Serv Spettrometria Massa, IABBAM, Via Argine 1085, I-80147 Naples, Italy TI - A novel heterodimeric antimicrobial peptide from the tree-frog Phyllomedusa distincta AB - We present here the purification and the analysis of the structural and functional properties of distinctin, a 5.4 kDa heterodimeric peptide with antimicrobial activity from the tree-frog Phyllomedusa distincta, This peptide a as isolated from the crude extract of skin granular glands by different chromatographic steps, Its minimal inhibitory concentration was determined against pathogenic Escherichia coli, Staphlococcus aureus, Enterococcus faecalis and Pseudomonas aeruginosa strains. Amino acid sequencing and mass spectrometric investigations demonstrated that distinctin is constituted of two different polypeptide chains connected by an intermolecular disulphide bridge. Circular dichroism and Fourier-transformed infrared spectroscopy studies showed that this molecule adopts, in water, a structure containing a significant percentage of antiparallel beta -sheet, A conformational variation was observed under experimental conditions mimicking a membrane-like environment. Database searches did not show sequence similarities with any known antimicrobial peptides, In the light of these results, we can consider distinctin as the first example of a new class of antimicrobial heterodimeric peptides from frog skin. (C) 2001 Federation of European Biochemical Societies. Published by Elsevier Science B,V, All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000168065400018 L2 - antimicrobial peptide;disulphide;heterodimer;conformation analysis;Phyllomedusa distincta;SECONDARY STRUCTURE PREDICTION; MOLECULAR-DYNAMICS; PROTEINS; CHANNEL; POLYPEPTIDES; NEUTROPHILS; RESOLUTION SO - Febs Letters 2001 ;494(1-2):85-89 2384 UI - 12360 AU - Batle J AU - Casas M AU - Fortes M AU - Solis MA AU - de Llano M AU - Valladares AA AU - Rojo O AD - Univ Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPESTIC, Secretaria Acad, Mexico City 04430, DF, MexicoIPN, CINVESTAV, Mexico City 04430, DF, MexicoCasas, M, Univ Illes Balears, Dept Fis, E-07071 Palma de Mallorca, Spain TI - Bose-Einstein condensation of nonzero-center-of-mass-momentum Cooper pairs AB - Cooper pair (CP) binding with both zero and nonzero center-of-mass momenta (CMM) is studied with a set of renormalized equations assuming a short-ranged (attractive) pairwise interfermion interaction. Expanding the associated dispersion relation in 2D in powers of the CMM, in weak-to-moderate coupling a term linear in the CMM dominates the pair excitation energy, while the quadratic behavior usually assumed in Bose-Einstein (BE) condensation studies prevails for any coupling only in the limit of zero Fermi velocity when the Fermi sea disappears, i.e., in vacuum. In 3D this same behavior is observed numerically. The linear term, moreover. exhibits CP breakup beyond a threshold CMM value which vanishes with coupling. This makes all the excited (nonzero-CMM) BE levels with preformed CPs collapse into a single ground level so that a BCS condensate (where only zero CMM CPs are usually allowed) appears in zero coupling to be a special case in either 2D or 3D of the BE condensate of linear-dispersion-relation CPs. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000172155700037 L2 - Cooper pairs;Bose-Einstein condensation;cuprate superconductivity;BCS-SUPERCONDUCTIVITY; DISPERSION-RELATION; FERMI-LIQUID; CROSSOVER; STATE; BIPOLARONS; SYMMETRY; WEAK; GAS SO - Physica C 2001 ;364():161-165 2385 UI - 12145 AU - Baumgardner D AU - Jonsson H AU - Dawson W AU - O'Connor D AU - Newton R AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoDroplet Measurement Technol, Boulder, CO 80308, USAUSN, Postgrad Sch, Monterey, CA 93943, USABaumgardner, D, Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - The cloud, aerosol and precipitation spectrometer: a new instrument for cloud investigations AB - A new airborne particle spectrometer has been developed with the same measurement capabilities of the Forward Scattering Spectrometer Probes (FSSP) models 100 and 300 (FSSP-300 and FSSP-100), two-dimensional optical imaging probe (2D-OAP), the Multiangle Aerosol Spectrometer Probe (MASP) and hot-wire liquid water probe, but with a single integrated system. The cloud, aerosol and precipitation spectrometer (CAPS) measures particles from 0.35 mum to 1.55 mm in diameter and liquid water content (LWC) from 0.01 to 3 g m(-3). In addition to combining five probes into one, it measures airspeed at the sample volume and transmits a data stream that requires no special interfaces to communicate with most computers. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 19 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0169-8095 UR - ISI:000172795300014 L2 - particle measurements;aerosol spectrometer;cloud droplet spectrometer;SIZE-DISTRIBUTION MEASUREMENTS; OPTICAL ARRAY PROBES; FSSP SO - Atmospheric Research 2001 ;59():251-264 2386 UI - 13120 AU - Bautista O AU - Mendez F AU - Trevino C AD - Univ Nacl Autonoma Mexico, Fac Ingn, Dept Termoenergia, Mexico City 04510, DF, MexicoUPM, Escuela Tecn Super Ingn Aeronaut, Madrid 28040, SpainMendez, F, Univ Nacl Autonoma Mexico, Fac Ingn, Dept Termoenergia, Mexico City 04510, DF, Mexico TI - The conjugate heat transfer from an internal heated small strip in a forced laminar flow AB - An asymptotic and numerical investigation was conducted for the cooling process, by a forced laminar flow, of a small strip with a non-uniform heat source. The nondimensional temperature distribution in the strip has been obtained as a function of the following parameters: (a) the intensity and distribution of the internal heat sources, (b) the aspect ratio of the strip, (c) the longitudinal heat conductance of the strip and (d) the Prandtl number of the fluid. Both the thermally thin as the thick wall approximations were considered in this paper. The total thermal energy or averaged temperature of the strip is found to decrease as the influence of the longitudinal heat conduction effects in the strip decreases in the thermally thin wall regime. After reaching a minimum, it increases again in the thermally thick wall regime MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Mechanics U5 - J;Article AV - English IS - 0947-7411 UR - ISI:000170342500022 L2 - NATURAL-CONVECTION; PLATE; CONDUCTION; SUBSTRATE; CHIPS SO - Heat and Mass Transfer 2001 ;37(4-5):485-491 2387 UI - 12726 AU - Bautista R AU - Sanchez A AU - Hernandez J AU - Oyekan A AU - Escalante B AD - IPN, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07360, DF, MexicoTexas So Univ, Coll Pharm & Hlth Sci, Ctr Cardiovasc Dis, Houston, TX 77004, USAEscalante, B, IPN, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07360, DF, Mexico TI - Angiotensin II type AT(2) receptor mRNA expression and renal vasodilatation are increased in renal failure AB - Kidney failure is associated with changes in renal vascular responses to angiotensin (Ang) II. We characterized expression of Ang II receptors and the renal vasoconstrictor and vasodilator responses to Ang II in kidneys from sham-operated and kidney failure rats. In the isolated perfused kidney of sham-operated rats, Ang II (1, 2, 4, and 8 ng) increased perfusion pressure by 27 +/-6, 41 +/- 10, 54 +/- 11, and 74 +/- 12 mmHg, respectively. These responses were amplified by 62 +/- 10% (P <0.05) in kidney failure rats. Losartan (1 mu mol/L), an angiotensin type 1 (AT(1)) receptor blocker, abolished renal vasoconstriction induced by Ang 11, unmasking a renal vasodilatation that was greater in kidney failure rats. CGP-42112 (1 mu mol/L) or PD 123,319 (1 mu mol/L), angiotensin type 2 (AT(2)) receptor ligands, blunted Ang II-induced renal vasodilatation. In the renal tissue of kidney failure rats, there was a marked increase in expression of AT(1) and AT(2) mRNA receptor. Ang II-induced vasodilatation was blunted by eicosatetraynoic acid (1 mu mol/L), the all-purpose inhibitor of arachidonic acid metabolism; clotrimazole (1 mu mol/L), an inhibitor of epoxygenase-dependent arachidonic acid metabolism; or N omega -nitro-L-arginine methyl ester (L-NAME; 1 mu mol/L), an inhibitor of NO synthesis. On stimulation with Ang II, 20-HETE was the predominant product released into the renal effluent of sham-operated rats, whereas epoxy-eicosatrienoic acids were the predominant products released into the effluent of kidney failure rats. These data suggest that during development of kidney failure, there is induction of the AT(2) receptors, which may account for increased Ang II-dependent vasodilatation through the predominant release of epoxyeicosatrienoic acids MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 15 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0194-911X UR - ISI:000171308400028 L2 - receptors, angiotensin;cytochrome P450;kidney failure;angiotensin II;arachidonic acid;RENOVASCULAR HYPERTENSION; NITRIC-OXIDE; RAT; VASOCONSTRICTION; IDENTIFICATION; INHIBITION; ACID SO - Hypertension 2001 ;38(3):669-673 2388 UI - 12415 AU - Beckman JE AU - Zurita A AU - Rozas M AD - Inst Astrofis Canarias, Tenerife, SpainCSIC, Madrid, SpainUNAM, Observ San Pedro Martir, Ensenada, Baja California, MexicoBeckman, JE, Inst Astrofis Canarias, Tenerife, Spain TI - Ionizing the diffuse interstellar medium in late-type galaxies AB - We show how the clumpy structure of the interstellar medium (ISM) both inside HII regions and in the diffuse component, permits the propagation of ionizing photons from OB stars on kiloparsec scales MH - Mexico|Baja California MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900095 L2 - galaxies : late-type;ISM;photoionization;H-II REGIONS; HII-REGIONS SO - Astrophysics and Space Science 2001 ;277():397-400 2389 UI - 14161 AU - Bej SK AU - Dalai AK AU - Maity SK AD - Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109, USAUniv Saskatchewan, Dept Chem Engn, Catalysis & Chem React Engn Lab, Saskatoon, SK S7N 5C9, CanadaInst Mexicano Petr, Mexico City 07730, DF, MexicoBej, SK, Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109, USA TI - Effect of diluent size on the performance of a micro-scale fixed bed multiphase reactor in up flow and down flow modes of operation AB - The comparative behaviors of a micro-scale fixed bed multiphase reactor in up flow and down how modes of operation were studied fur hydrodesulfurization of atmospheric gas oil over a commercial catalyst. The experiments for the two modes of operation were conducted for a wide range of diluent size and other process variables such as liquid hourly space velocity and hydrogen/gas oil ratio. The results showed that the down how mode of operation using 0.19 mm size of diluent could be used for generatings reliable and meaningful data. On the other hand, the use of up flow mode of operation is restricted only for higher space velocities even while using 0.19 mm size of diluent. The results also indicated that the performance of the up flow mode of operation was poor at higher hydrogen/gas oil ratio. This change in performance is pronounced when higher size of diluent was used with the catalyst. In contrary, the hydrogen/gas oil ratio had minimum effect on the performance of the reactor for down flow mode of operation. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000167388100019 L2 - dilution technique;up row;down flow;micro-reactor;gas oil;hydrodesulfurization;TRICKLE-BED; HIGH-PRESSURE; CATALYST; UPFLOW; DILUTION; DOWNFLOW; FINES SO - Catalysis Today 2001 ;64(3-4):333-345 2390 UI - 14184 AU - Bell DM AU - Hamilton MJ AU - Edwards CW AU - Wiggins LE AU - Martinez RM AU - Strauss RE AU - Bradley RD AU - Baker RJ AD - Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USAOklahoma State Univ, Dept Zool, Stillwater, OK 74078, USAInst Politecn Nacl, Ctr Interdisciplinario Invest Para Desarrollo Int, Durango 34980, MexicoTexas Tech Univ Museum, Lubbock, TX 79409, USABradley, RD, Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USA TI - Patterns of karyotypic megaevolution in Reithrodontomys: Evidence from a cytochrome-b phylogenetic hypothesis AB - Phylogenetic relationships among 7 species of Reithrodontomys were examined using the complete mitochondrial cytochrome-b gene. DNA-sequence data were analyzed using parsimony (weighted and unweighted) and genetic distance methods. In all analyses, Ii. sumichrasti, Ii. megalotis, and R. zacatecae formed a monophyletic clade. Likewise, Ii. montanus and Ii. raviventris were depicted as sister taxa in all analyses. Our study supports recognition of Ii. zacatecae as a species distinct from Ii. megalotis and recognition of Ii. raviventris as distinct from Ii. montanus. Patterns of chromosomal evolution were examined using differential staining as resolved by 3 DNA probes and fluorescent in situ hybridization. Using the phylogeny based on DNA sequences, we concluded that there has been extensive chromosomal repatterning (in most cases karyotypic megaevolution) in the evolution of R. zacafecae, Ii. megalotis, Ii. sumichrasti, Ii. montanus, Ii. raviventris, and R. humulis MH - Mexico|Durango MH - USA PB - PROVO: AMER SOC MAMMALOGISTS RP - NOT IN FILE U3 - TC 11 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000167309200007 L2 - chromosomal evolution;DNA sequences;in situ hybridization;karyotypic megaevolution;Reithrodontomys;MOLECULAR CLOCK HYPOTHESIS; SPECIES GROUP RODENTIA; DNA-SEQUENCE DATA; MITOCHONDRIAL-DNA; HARVEST MICE; EVOLUTION; MURIDAE; PEROMYSCUS; PHYLOGEOGRAPHY; AMPLIFICATION SO - Journal of Mammalogy 2001 ;82(1):81-91 2391 UI - 13872 AU - Bellini M AD - Univ Nacl Mar del Plata, Fac Ciencias Exactas & Nat, Dept Fis, RA-7600 Buenos Aires, DF, ArgentinaBellini, M, Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, AP 2-821, Morelia 58041, Michoacan, Mexico TI - Inflation and nonequilibrium thermodynamics for the fluctuations in the infrared sector AB - In the framework of inflationary cosmology I study some aspects of nonequilibrium thermodynamics for the matter held fluctuations. The thermodynamic analysis is developed for de Sitter and power-law expansions of the universe. In both cases, I find that the heat capacity is negative leading respectively, to exponential and superexponential growth for the number of states in the infrared sector for de Sitter and power-law expansions of the universe. The spectrum for the matter field fluctuations can be understood from the background effective temperature at the horizon entry MH - Argentina MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000168203400084 L2 - NEGATIVE SPECIFIC-HEAT; PRIMORDIAL FLUCTUATIONS; STOCHASTIC INFLATION; WARM INFLATION; SPACETIME SO - Physical Review D 2001 ;6308(8): 2392 UI - 14130 AU - Beltran MT AU - Estalella R AU - Anglada G AU - Rodriguez LF AU - Torrelles JM AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainCSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, IEEC, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainBeltran, MT, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - Radio spectral indices of the powering sources of outflows AB - Eight regions containing molecular or HH outflows (Mon R2E, S287, L1654, L483, PV Cephei, L1203, L1251A, and CB 247) have been observed with the VLA at 6 cm, and a total of 55 sources have been detected above a 5 sigma level. By combining our observations at 6 cm with previous data obtained at 3.6 cm, we estimate the spectral indices of the sources in the fields. For 32 of the sources we discriminate the sign of the spectral index and thus, we obtain information about the nature of the emission. For seven outflows (Mon R2E, S287-B, L1654, L483, PV Cephei, L1203, and L1251A) we found at least a central source with an spectral index consistent with thermal free-free emission from thermal radio jets. Multiple sources, separated similar to 10 ", are found near the center of the Mon R2E, S287-B, L1654, and L1251A outflows. In the case of S287-B we found two sources that are valid candidates to drive the S287-B molecular outflow and could be related to the outflow excitation. Under the assumption that the observed emission arises from thermal radio jets, we discuss the mechanism responsible for the ionization and the constraints that introduces on their physical parameters, and we estimate that the flow of ionized material has to originate at a few AU from the exciting star. Most of the remaining, noncentral, sources are characterized by negative spectral indices (alpha < -0.1) and are probably nonthermal background objects unrelated to the studied star-forming regions MH - USA MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000167582800028 L2 - ISM : jets and outflows;radio continuum;stars : formation;YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; FREE-FREE RADIATION; IRAS SOURCES; CONTINUUM EMISSION; AMMONIA OBSERVATIONS; MOLECULAR OUTFLOWS; RHO-OPHIUCHI; WATER MASERS; PV-CEPHEI SO - Astronomical Journal 2001 ;121(3):1556-1568 2393 UI - 12636 AU - Berezhiani Z AU - Mazumdar A AU - Perez-Lorenzana A AD - Univ Aquila, Dipartamento Fis, I-67010 Coppito, AQ, ItalyIst Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Coppito, AQ, ItalyAndronikashvili Inst Phys, GE-380077 Tbilisi, Rep of GeorgiaAbdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, Univ Aquila, Dipartamento Fis, I-67010 Coppito, AQ, Italy TI - Affleck-Dine leptogenesis via right-handed sneutrino fields in a supersymmetric hybrid inflation model AB - The onset of inflation in hybrid models require fine tuning in the initial conditions. The inflaton field should have an initial value close to the Planck scale Mp, whereas the auxiliary "orthogonal" field must be close to zero with an extreme accuracy. This problem can be alleviated if the orthogonal field decays fast into some states not coupled to the inflaton. Natural candidates for such states can be the right-handed neutrinos. We show that a non-trivial evolution of the classic sneutrino fields after inflation offers an interesting mechanism for generating a correct amount of lepton asymmetry, which being reprocessed by sphalerons can explain the observed baryon asymmetry of the Universe. Our scenario implies interesting bounds for the neutrino masses in the context of seesaw mechanism. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Rep of Georgia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171529400009 L2 - INITIAL CONDITIONS; GRAVITINO PRODUCTION; HORIZONTAL SYMMETRY; NON-CONSERVATION; BARYOGENESIS; SUPERGRAVITY; UNIVERSE; BARYON; TRANSITIONS; ASYMMETRY SO - Physics Letters B 2001 ;518(3-4):282-293 2394 UI - 12193 AU - Berezhkovskii AM AU - Larralde H AU - Weiss GH AD - NIH, Ctr Informat Technol, Bethesda, MD 20892, USAUniv Nacl Autonoma Mexico, Ctr Ciencias, Cuernavaca 62191, Morelos, MexicoLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaBerezhkovskii, AM, NIH, Ctr Informat Technol, Bldg 10, Bethesda, MD 20892 USA TI - Region visited by a spherical Brownian particle in the presence of an absorbing boundary AB - We calculate the time dependence of the average volume of a Wiener sausage in the presence of an absorbing boundary in one and three dimensions. In one dimension it is shown that the presence of an absorbing point reduces the time dependence of the average span from being proportional to roott in an unbounded space, to being proportional to ln(t) at long times. In three dimensions the average volume increases as roott at long times rather than being proportional to t as in free space MH - USA MH - Mexico|Morelos MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000172726300061 L2 - WIENER SAUSAGE SO - Physical Review e 2001 ;6406(6): 2395 UI - 13865 AU - Bergman K AU - Gonzales R AU - Pedroza MA AU - Herrera M AD - Danieli Centromet, Vasteras, SwedenHysla, Monterrey, MexicoBergman, K, Danieli Centromet, Vasteras, Sweden TI - Twin-cathode DC EAF concepts and results at Hylsa, Mexico AB - A recent development in the Danieli DC EAF technology is the twin-electrode DC EAF concept at Hylsa, Flat Product Division, Monterrey, Mexico. A Danieli 135-t twin-electrode DC EAF with an installed power of 208 MVA was started up on October 30, 1998, The furnace is designed for melting a 100 % Hytemp((R)) DRI charge MH - Mexico|Nuevo Leon MH - Sweden PB - NANTERRE CEDEX: REVUE DE METALLURGIE RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0035-1563 UR - ISI:000168096000005 SO - Revue de Metallurgie-Cahiers D Informations Techniques 2001 ;98(1):55-62 2396 UI - 14099 AU - Berhault G AU - Mehta A AU - Pavel AC AU - Yang JZ AU - Rendon L AU - Yacaman MJ AU - Araiza LC AU - Moller AD AU - Chianelli RR AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAStanford Univ, Stanford Synchrotron Radiat Lab, SLAC, Stanford, CA 94309, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoININ, Salazar, Edo de Mexico, MexicoCCMC, Ensenada 22830, Baja California, MexicoBerhault, G, Univ Poitiers, Catalyse Chim Organ Lab, 40 Ave Recteur Pineau, F-86022 Poitiers, France TI - The role of structural carbon in transition metal sulfides hydrotreating catalysts AB - The necessity of improving the hydrotreating sulfide catalysts' efficiency in deep hydrodesulfurization (HDS) is urgent due to new environmental regulations regarding sulfur content in fuels. Progress has been made in understanding the basis for cobalt-promoted molybdenum sulfide activity. However, recent results [R. R. Chianelli and G. Berhault, Catal. Today 53, 357 (1999)] have evidenced that carbon plays an important role in the stabilized structure of active catalysts. Indeed, the active surface in the stabilized, catalytically active transition metal sulfide (TMS) phase is carbided. Moreover, it is well-known that organosulfide treatment of oxide catalysts to produce the active catalytic form results in a better HDS activity, suggesting an initial modification of the sulfide structure in the presence of a carbon source. This study reports the structural and textural modifications of unsupported MoS2 catalyst via CH3-S-CH3 or dibenzothiophene treatment in order to better characterize the formation of structural carbon on MoS2 layered particles. Both bulk characterization techniques (Synchrotron X-ray diffraction, far-IR) and surface-sensitive methods (electron energy loss spectroscopy (EELS), near-edge X-ray absorption fine structure (NEXAFS)) were performed in order to carefully study the final state of carburized unsupported molybdenum sulfide. Complementary electronic microscopy studies were carried out to clarify textural modifications occurring consecutively with this treatment. Evidence is shown that structural carbon processes through a replacement of sulfur atoms at the reactive edges of MoS2 platelets, resulting in a stabilized MoS2-xCx phase. This carburization surface process does not affect the MoS2 bulk structure. Results also demonstrate that carbon stabilizes texturally sulfide particles, keeping crystallites smaller and less stacked. Thus, the active TMS should be viewed as sulfide-supported transition metal carbides. This work is a preliminary study about the neglected role of carbon on TMS-based catalysts operating in hydrotreating conditions. Further studies will point out the catalytic consequences due to the formation of this stabilized phase. (C) 2001 Academic Press MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 42 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000167650100002 L2 - MOLYBDENUM CARBIDE CATALYSTS; HYDRODESULFURIZATION CATALYSTS; MOS2 CATALYSTS; SURFACE; SPECTROSCOPY; HYDROGENATION; THIOPHENE; NITRIDES; NICKEL; HYDRODENITROGENATION SO - Journal of Catalysis 2001 ;198(1):9-19 2397 UI - 13337 AU - Berkove E AU - Juan-Pineda D AU - Pearson K AD - Lafayette Coll, Dept Math, Easton, PA 18042, USAUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoUniv Valparaiso, Dept Math & CS, Valparaiso, IN 46383, USABerkove, E, Lafayette Coll, Dept Math, Easton, PA 18042, USA TI - The lower algebraic K-theory of Fuchsian groups AB - Let Gamma be a cocompact Fuchsian group. We calculate the lower algebraic K -theory of the integral group ring Z Gamma and find an explicit formula for K-i(Z Gamma), i less than or equal to 1, in terms of the lower K -groups of maximal finite cyclic subgroups of Gamma MH - Mexico|Michoacan MH - USA PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0010-2571 UR - ISI:000169733600007 L2 - K-theory;Fuchsian groups;Kleinian groups;CRYSTALLOGRAPHIC GROUPS; ISOMORPHISM; MAPS SO - Commentarii Mathematici Helvetici 2001 ;76(2):339-352 2398 UI - 12108 AU - Berman GP AU - Borgonovi F AU - Izrailev FM AU - Tsifrinovich VI AD - Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyLos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAIst Nazl Fis Nucl, Sezione Pavia, Brescia, ItalyUniv Brescia, INFM, Brescia, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoPolytech Univ, IDS Dept, Metrotech Ctr, Brooklyn, NY 11201, USABorgonovi, F, Univ Cattolica, Dipartimento Matemat & Fis, Via Musei 41, I-25121 Brescia, Italy TI - Single-pulse preparation of the uniform superpositional state used in quantum algorithms AB - We examine a single-pulse preparation of the uniform superpositional wave function, which includes all basis states, in a spin quantum computer. The effective energy spectrum and the errors generated by this pulse are studied in detail. We show that, in spite of the finite width of the energy spectrum bands, amplitude and phase errors can be made reasonably small. (C) 2001 Published by Elsevier Science B.V MH - Italy MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000172799000009 SO - Physics Letters A 2001 ;291(4-5):232-236 2399 UI - 12277 AU - Berman GP AU - Borgonovi F AU - Izrailev FM AU - Tsifrinovich VI AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyINFM, Grp Collegato Brescia, Brescia, ItalyIst Nazl Fis Nucl, Sez Pavia, Pavia, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoPolytech Univ, IDS Dept, Metrotech Ctr 6, Brooklyn, NY 11201, USABerman, GP, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Delocalization border and onset of chaos in a model of quantum computation AB - We study the properties of spectra and eigenfunctions for a chain of 1/2 spins (qubits) in an external time-dependent magnetic field and under the conditions of nonselective excitation (when the amplitude of the magnetic field is large). This model is known as a possible candidate for experimental realization of quantum computation. We present the theory for finding delocalization transitions and show that for the interaction between nearest qubits, the transition is very different from that in quantum chaos. We explain this phenomena by showing that in the considered region of parameters our model is close to an integrable one. According to a general opinion, the threshold for the onset of quantum chaos due to the interqubit interaction decreases with an increase of the number of qubits. Contrary to this expectation, for a magnetic field with constant gradient we have found that chaos border does not depend on the number of qubits. We give analytical estimates that explain this effect, together with numerical data supporting our analysis. Random models with long-range interactions have been studied as well. In particular, we show that in this case the delocalization and quantum chaos borders coincide MH - Italy MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000172407100077 L2 - FINITE FERMI SYSTEMS; NUCLEAR SHELL-MODEL; ISING SPIN CHAIN; QUASI-PARTICLE; CLASSICAL CORRESPONDENCE; WEAK PERTURBATIONS; STATISTICAL-THEORY; COMPOUND STATES; COMPUTERS; THERMALIZATION SO - Physical Review e 2001 ;64(5):art-056226 2400 UI - 14307 AU - Berman GP AU - Bishop AR AU - Doolen GD AU - Lopez GV AU - Tsifrinovich VI AD - Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Fis, Guadalajara 44430, Jalisco, MexicoPolytech Univ, Dept Appl Math & Phys, Brooklyn, NY 11201, USABerman, GP, Univ Calif Los Alamos Natl Lab, Div Theoret, T-13,MS B213, Los Alamos, NM 87545 USA TI - Influence of non-resonant effects on the dynamics of quantum logic gates at room temperature AB - We study numerically the influence of non-resonant effects on the dynamics of a single-pi -pulse quantum CONTROL-NOT (CN) gate in a macroscopic ensemble of four-spin molecules at room temperature. The four nuclear spins in each molecule represent a four-qubit register. The qubits are "labeled" by the characteristic frequencies, omega (k), (k = 0-3) due to the Zeeman interaction of the nuclear spins with the magnetic field. The qubits interact with each other through an Ising interaction of strength J. The paper examines the feasibility of implementing a single-pulse quantum CN gate in an ensemble of quantum molecules at room temperature. We determine a parameter region, omega (k) and J, in which a single pulse quantum CN gate can be implemented at room temperature. We also show that there exist characteristic critical values of parameters, Delta omega (cr) = \omega (k') - omega (k)\(cr) and J(cr), such that for J < J(cr) and omega (k') = \omega (k') - omega (k)\ < omega (cr), non-resonant effects are sufficient to destroy the dynamics required for quantum logic operations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000166929800020 L2 - non-resonant effects;quantum logic gates;COMPUTATION; COMPUTER; DECOHERENCE; DOT SO - Physica B-Condensed Matter 2001 ;293(3-4):350-361 2401 UI - 13737 AU - Bernal-Alvarado J AU - Pereira RD AU - Mansanares AM AU - da Silva EC AD - Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana, BrazilUniv Guanajuato, Inst Fis, Leon 37000, Gto, MexicoUniv Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilBernal-Alvarado, J, Univ Guanajuato, Inst Fis, AP E-143, Leon 37000, Gto, Mexico TI - Thermal diffusivity measurements for two media systems with thermal lens technique in the two lasers mismatched mode AB - The thermal lens signal produced by a two media system - two thin samples in a sandwich-like array - is experimentally investigated. A combination of materials presenting self-focusing and self-defocusing lens behavior were studied, and their distinct termal diffusivities produced composed thermal lens with different characteristic times. A model considering alinear combination of thermal lenses is proposed. It adjusts very well the experimental data, giving the thermal diffusivities of each component, provided no net axial heat flux is present. The validity of the model is discussed and it is applied to the characterization of thin films grown on glass substrate MH - Brazil MH - Mexico|Guanajuato PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200052 SO - Analytical Sciences 2001 ;17():S178-S180 2402 UI - 12276 AU - Bernard P AU - Scior T AU - Didier B AU - Hibert M AU - Berthon JY AD - GREENPHARMA S A, F-45067 Orleans 2, FranceUniv Amer Puebla, Puebla 72820, MexicoFac Pharm, UMR CNRS, Lab Pharmacochim Commun Cellulaire, F-67400 Illkirch Graffenstaden, FranceBernard, P, GREENPHARMA S A, 1 Rue Chartres,BP 6759, F-45067 Orleans 2, France TI - Ethnopharmacology and bioinformatic combination for leads discovery: application to phospholipase A(2) inhibitors AB - A program combining ethnopharmacology and bioinformatic approaches has successfully been applied on anti-inflammatory activity. (i) An ethnobotanical study allowed the identification of several plants associated with putative anti-inflammatory properties as potential leads, (ii) On the other hand, it is well known that phospholipase A(2) is a target implicated in the pro-inflammatory process. Thus, (iii) some selected plant extracts were experimentally tested on phospholipase A,. Finally, (iv) these experimental results combined with bioinformatic tools, such as database exploitation and molecular modeling, allowed to suggest that one compound, betulin and its oxidative form betulinic acid, might be responsible of the anti-PLA(2) activity. This suggestion was confirmed experimentally. (C) 2001 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 29 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000172499300005 L2 - ethnopharmacology;bioinformatic;anti-inflammatory;phospholipase A(2);PANCREATIC PHOSPHOLIPASE-A2; CRYSTAL-STRUCTURE; COMPLEX SO - Phytochemistry 2001 ;58(6):865-874 2403 UI - 12889 AU - Betancourt JI AU - Davies HA AD - Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandBetancourt, JI, UNAM, Mat Res Inst, Mexico City 05410, DF, Mexico TI - High coercivity Zr and Co substituted (Nd-Pr)-Fe-B nanophase hard magnetic alloys AB - The effects of Zr and Co substitutions for Fe on the magnetic properties of nanocrystalline near-stoichiometric (Nd0.75Pr0.25)(12)(Fe1-xCOx)(82-z)ZrzB6 (x = 0, 0.1, 0.2 and z = 0-4) alloy ribbons are reported. The nanoscale structures were derived by devritrification annealing of amorphous as-cast ribbon. Very good combinations of energy product, (BH) a (similar to 160 kJ/m(3)) and intrinsic coercivities, H-i(c) (within the range 800-1400 kA/m for various Zr concentrations) were achieved for the Co-free alloys although the Zr addition resulted in some reduction in T-c. For alloys in which, also, 10 and 20% of the Fe was substituted by Co, excellent remanence enhancement, J(r) (to >1 T) were achieved with 1 at% Zr addition. Combined with excellent squareness of the J-H second quadrant, this gave (BH)(max) up to 175 kJ/m(3), together with Curie temperatures, T. of > 375 degreesC and > 460 degreesC for 10 and 20% Co, respectively, and with only minor reductions in H-i(c). The role of Zr in promoting uniform and refined grain structures and enhancing the magnetic properties will be discussed MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9464 UR - ISI:000170910900383 L2 - dopant additions;high coercivity;NdPrFeB nanophase alloys;remanence enhancement SO - Ieee Transactions on Magnetics 2001 ;37(4):2480-2482 2404 UI - 14587 AU - Betancourt JL AU - Rylander KA AU - Penalba C AU - McVickar JL AD - US Geol Survey, Tucson, AZ 85745, USAUNAM, Inst Ecol, Hermosillo, Sonora, MexicoNatl Pk Serv, Santa Fe, NM 87504, USABetancourt, JL, US Geol Survey, 1675 W Anklam Rd, Tucson, AZ 85745, USA TI - Late Quaternary vegetation history of Rough Canyon, south-central New Mexico, USA AB - South-central New Mexico, USA, at the junction of the Rocky Mountains, High Plains and Chihuahuan Desert, is one of the better known regions in the late Quaternary of North America. Plant macrofossils and pollen from a packrat midden series in Rough Canyon, New Mexico allows refinement of plant distributions and paleoclimates in this transitional area since full glacial times. From 17000 to 12000 C-14 yr BP, Pinus edulis-Juniperus scopulorum woodlands dominated limestone substrates between 1800 and 1490 m. with Pseudotsuga menziesii and other mixed-conifer species restricted to shady, north-facing slopes. Juniperus deppeana, the dominant juniper today above 2000 m in southern New Mexico, is conspicuously absent from glacial middens and must have been displaced south of the US-Mexico border. The minimum climatic conditions for P. edulis-J. scopulorum woodlands are ca 20% wetter and 3.5-5 degreesC cooler (July mean maximum temperatures) than the modern climate at Rough Canyon. Holocene warming/drying may have started as early as 12 000 C-14 yr BP with the extirpation of J. scopulorum from Rough Canyon, and was completed by at least 10 540 C-14 yr BP. The record for arrivals of some desert species is confounded by traces of pollen and macrofossils in some of the glacial middens, which could signify either earliest occurrence or temporal mixing (contamination) of assemblages. AMS C-14 dating can discriminate between early arrival and contamination in midden macrofossils but not in pollen. AMS dates show that Choisya dumosa, presently near its northern (cold) limits at Rough Canyon, endured late glacial winters, possibly as clonal populations. Some Larrea tridentata leaves and pollen occur in middens dominated by conifers and oaks no longer at the site; an AMS date of 3205 C-14 yr BP on Larrea leaves from one midden indicates contamination. Evidence for some macrofossil contamination, however, does not rule out the possibility that pollen of desert elements (e.g. Larrea, Prosopis) in late glacial-early Holocene middens indicates their presence in the Tularosa Basin, well ahead of their local appearance in Rough Canyon. Finally, the increasing dominance of desert elements after 5000 C-14 yr BP in the Rough Canyon series and elsewhere in the northern Chihuahuan Desert could reflect slow, postglacial migration from the south and/or progressive encroachment with gradual stripping of soils formed during the last glacial period. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Geography, Physical;Geosciences, Multidisciplinary;Paleontology U5 - J;Article AV - English IS - 0031-0182 UR - ISI:000166131400004 L2 - Chihuahuan Desert;climate change;Holocene;macrofossils;packrat middens;paleoecology;Pleistocene;pollen;SOUTHWESTERN UNITED-STATES; NORTHERN CHIHUAHUAN DESERT; FOSSIL PACKRAT MIDDENS; FRICTION SKIN PRINTS; PENDEJO-CAVE; SONORAN DESERT; LINEAR-CENTIMETER; EPIDERMAL RIDGES; POLLEN ANALYSIS; ARIZONA SO - Palaeogeography Palaeoclimatology Palaeoecology 2001 ;165(1-2):71-95 2405 UI - 12333 AU - Beuchat LR AU - Frandberg E AU - Deak T AU - Alzamora SM AU - Chen J AU - Guerrero S AU - Lopez-Malo A AU - Ohlsson I AU - Olsen M AU - Peinado JM AU - Schnurer J AU - de Siloniz MI AU - Tornai-Lehoczki J AD - Univ Georgia, Ctr Food Safety, Griffin, GA 30223, USAUniv Georgia, Dept Food Sci & Technol, Griffin, GA 30223, USANatl Food Adm Toxicol Lab, Div Biol, S-75126 Uppsala, SwedenSzent Istvan Univ, Dept Microbiol & Biotechnol, H-1118 Budapest, HungaryUniv Buenos Aires, Fac Ciencias Exactas & Nat, Pabellon Ind, RA-1428 Buenos Aires, DF, ArgentinaUniv Americas Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, MexicoSwedish Univ Agr Sci, Dept Microbiol, S-75007 Uppsala, SwedenUniv Complutense Madrid, Fac Biol, Dept Microbiol, Madrid 20840, SpainSzent Istvan Univ, Natl Collect Agr & Ind Microorganisms, H-1118 Budapest, HungaryBeuchat, LR, Univ Georgia, Ctr Food Safety, 1109 Expt St, Griffin, GA 30223 USA TI - Performance of mycological media in enumerating desiccated food spoilage yeasts: an interlaboratory study AB - Dichloran 18% glycerol agar (DG18) was originally formulated to enumerate nonfastidious xerophilic moulds in foods containing rapidly growing Eurotium species. Some laboratories are now using DG18 as a general purpose medium for enumerating yeasts and moulds, although its performance in recovering yeasts from dry foods has not been evaluated. An interlaboratory study compared DG18 with dichloran rose bengal chloramphenicol agar (DRBC), plate count agar supplemented with chloramphenicol (PCAC), tryptone glucose yeast extract chloramphenicol agar (TGYC), acidified potato dextrose agar (APDA), and orange serum agar (OSA) for their suitability to enumerate 14 species of lyophilized yeasts. The coefficient of variation for among-laboratories repeatability within yeast was 1.39% and reproducibility of counts among laboratories was 7.1%. The order of performance of media for recovering yeasts was TGYC > PCAC = OSA > APDA > DRBC > DG18. A second study was done to determine the combined effects of storage time and temperature on viability of yeasts and suitability of media for recovery. Higher viability was retained at - 18 degreesC than at 5 degreesC or 25 degreesC for up to 42 weeks, although the difference in mean counts of yeasts stored at - 18 degreesC and 25 degreesC was only 0.78 log(10) cfu/ml of rehydrated suspension. TGYC was equal to PCAC and superior to the other four media in recovering yeasts stored at - 18 degreesC, 5 degreesC, or 25 degreesC for up to 42 weeks. Results from both the interlaboratory study and the storage study support the use of TGYC for enumerating desiccated yeasts. DG18 is not recommended as a general purpose medium for recovering yeasts from a desiccated condition. (C) 2001, Elsevier Science B.V. All rights reserved MH - USA MH - Argentina MH - Hungary MH - Mexico|Puebla MH - Spain MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0168-1605 UR - ISI:000172368300010 L2 - mycological media;yeast;TGYC;ZYGOSACCHAROMYCES-ROUXII; XEROPHILIC YEASTS; ROSE-BENGAL; MOLDS; DILUENTS; FUNGI SO - International Journal of Food Microbiology 2001 ;70(1-2):89-96 2406 UI - 12848 AU - Beutler AM AU - Rull M AU - Schlesinger N AU - Baker DG AU - Hoffman BI AU - Schumacher HR AD - Riddle Mem Hosp, Media, PA 19063, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Med & Dent New Jersey, New Jersey Med Sch, Dept Allergol Immunol & Rheumatol, Rheumatol Sect, Newark, NJ 07103, USACentocor Inc, Clin Res, Malvern, PA 19355, USAMed Coll Penn & Hahnemann Univ, Dept Rheumatol, Philadelphia, PA, USAVAMC, Arthrit Immunol Ctr, Philadelphia, PA, USABeutler, AM, Riddle Mem Hosp, 1068 W Baltimore Pike, Media, PA 19063 USA TI - Treatment with allopurinol decreases the number of acute gout attacks despite persistently elevated serum uric acid levels MH - Mexico|Distrito Federal MH - USA PB - PISA: CLINICAL & EXPER RHEUMATOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Rheumatology U5 - J;Letter AV - English IS - 0392-856X UR - ISI:000171056700020 L2 - ARTHRITIS; RATS SO - Clinical and Experimental Rheumatology 2001 ;19(5):595-595 2407 UI - 13900 AU - Bhaud MR AU - Fernandez-Alamo MA AD - Univ Paris 06, Observ Oceanol Banyuls, CNRS, F-66650 Banyuls sur Mer, FranceNatl Autonomous Univ Mexico, Fac Ciencias, Lab Invertebrados, Mexico City 04510, DF, MexicoBhaud, MR, Univ Paris 06, Observ Oceanol Banyuls, CNRS, BP 44, F-66650 Banyuls sur Mer, France TI - First description of the larvae of Dianthyrsus (Sabellariidae, Polychaeta) from the Gulf of California and Bahia de Banderas, Mexico AB - Larvae belonging to the family Sabellariidae (Polychaeta) were collected from the Gulf of California and in the Bahia de Banderas, on the west coast of Mexico. The oldest stages were selected for identification. The presence of three parathoracic segments and one pair of opercular hooks led to the genus Idanthyrsus. Identification at the species level was more difficult, although I. armatopsis is a serious possibility. This is the first description of the planktonic larval stage of a representative of the genus Idanthyrsus. The authors draw attention to the usefulness of a precise description of certain features, such as the morphology of uncini, or of the primary opercular paleae. which simplifies the task of identifying larvae at the species level. Comparison inside the family, between species whose development is known, confirms the homogeneous ontogenesis and suggests strong phyletic constraints. Then emerge the questions of reproduction for specimens living over a large bathymetric range and the origin of larvae collected in the open sea MH - France MH - Mexico|Distrito Federal PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000168137300005 L2 - PHRAGMATOPOMA-LAPIDOSA; TUBE WORM; SETTLEMENT SO - Bulletin of Marine Science 2001 ;68(2):221-232 2408 UI - 12328 AU - Bicherov AV AU - Kharisov BI AU - Blanco LM AU - Korshunov OY AU - Koroleva EL AU - Burlov AS AU - Borodkin GS AU - Kurbatov VP AU - Uflyand IE AU - Garnovskii AD AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas De Los Garza 66450, NL, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov Na Donu 344006, RussiaKharisov, BI, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, AP 18-F, San Nicolas De Los Garza 66450, NL, Mexico TI - Metal chelates of new ligands: 1,2-benzothiazine-1,1-dioxide derivatives AB - The novel chelates ML2 (M = Co, Ni, Cu, Zn) were obtained by the interaction of 3-benzoyl-4-hydroxy- 1,2-benzothiazine-4(3H)-on-1, 1-dioxide and 2-methyl-3-benzoyl-4-hydroxy-1,2-benzothiazine-4(3H)-on-1,1-dioxide with elemental metals (direct electrochemical synthesis) or their acetates (chemical synthesis) in methanol. The tetrahedral or polymeric-octahedral structures with a beta -diketonate fragment are assigned based on IR and H-1 NMR spectra. The studied ligands and their complexes are model compounds of molecules used as anti-inflammatory drugs MH - Mexico|Nuevo Leon MH - Russia PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0095-8972 UR - ISI:000172387600013 L2 - piroxicam;isoxicam;1,2-benzothiazine-3-carboxamide-1,1-dioxide;complexes;electrosynthesis;ambidentate ligand system SO - Journal of Coordination Chemistry 2001 ;54(3-4):337-342 2409 UI - 12466 AU - Bidichandani SI AU - Clark RM AU - Bhatti S AU - Alonso E AU - Yescas P AU - Rasmussen A AD - Univ Oklahoma, Hlth Sci Ctr, Oklahoma City, OK, USAInst Nacl Neurol & Neurocirug Manuel Velasco, Mexico City, DF, Mexico TI - Unexpectedly low prevalence of Friedreich ataxia in the Mexican population MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648902374 SO - American Journal of Human Genetics 2001 ;69(4):585-585 2410 UI - 13616 AU - Bijker R AU - Hess PO AU - Misicu S AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Inst Nucl Phys, Bucharest, RomaniaBijker, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior,CU AP 70-543, Mexico City 04510, DF, Mexico TI - A geometric and an algebraic model for tri-nuclear molecules AB - A geometrical model for tri-nuclear molecules is reviewed. For an analytical solution the nuclei have to be prolately deformed and in a line connected to each other. Furthermore, there have to be two heavy and one light cluster, the latter sandwiched between the two heavy clusters. As an alternative we also study an algebraic model of tri-cluster molecules based on a U(7) group. This model allows arbitrary orientations of the center of masses MH - Mexico|Distrito Federal MH - Romania PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000168898400010 L2 - tri-nuclear molecules;relative and butterfly motion;U(7) model;triaxial systems;FISSION; CF-252 SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2001 ;13(1-3):89-92 2411 UI - 12197 AU - Bills GF AU - Arias RM AU - Reyes M AU - Heredia G AD - Merck Sharp & Dohme Espana SA, Ctr Invest Bas, E-28027 Madrid, SpainInst Ecol AC, Xalapa 91000, Veracruz, MexicoBills, GF, Merck Sharp & Dohme Espana SA, Ctr Invest Bas, E-28027 Madrid, Spain TI - Merimbla humicoloides sp nov from conifer forest soil of Veracruz state, Mexico AB - Merimbla humicoloides sp, nov. was isolated after heat treatment of soil collected in a pine forest of Veracruz state, Mexico. The fungus is characterized by pate buff to cinnamon colonies that become dark brown to black in reverse and conidiophores that vary from irregularly asymmetrical penicilli to symmetrical penicilli with inflated metulae, and Humicola-like chlamydospores on the submerged hyphae, Phylogenetic inferences made from the ITS1-5.8S-ITS2 rDNA sequences indicate that M. humicoloides is a member of the Trichocomaceae and that it is related to M. ingelheimensis, Hamigera avellanea, and Penicillium species MH - Mexico|Veracruz MH - Spain PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0953-7562 UR - ISI:000172600500017 L2 - SEQUENCE SO - Mycological Research 2001 ;105():1273-1279 2412 UI - 12437 AU - Binoth T AU - Guillet JP AU - Heinrich G AU - Schubert C AD - Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Savoie, CNRS, UMR 510, Lab Annecy Le Vieux Phys Theor, F-74941 Annecy Le Vieux, FranceUniv Paris 11, Phys Theor Lab, UMR 8627, CNRS, F-91405 Orsay, FranceUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoBinoth, T, Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland TI - Calculation of 1-loop hexagon amplitudes in the Yukawa model AB - We calculate a class of one-loop six-point amplitudes in the Yukawa model. The construction of multi-particle amplitudes is done in the string inspired formalism and compared to the Feynman diagrammatic approach. We show that there exists a surprisingly efficient way of calculating such amplitudes by using cyclic identities of kinematic coefficients and discuss in detail cancellation mechanisms of spurious terms. A collection of formulas which are useful for the calculation of massless hexagon amplitudes is given. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Michoacan MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000172001200016 L2 - ONE-LOOP AMPLITUDES; GAUGE-THEORIES; QCD CORRECTIONS; INTEGRALS; FORMALISM; FEYNMAN; COUPLINGS; SCALAR; FIELD SO - Nuclear Physics B 2001 ;615(1-3):385-401 2413 UI - 12946 AU - Birkle P AU - Merkel B AU - Portugal E AU - Torres-Alvarado IS AD - Inst Invest Elect, Unidad Geotermia, Cuernavaca 62001, Morelos, MexicoTech Univ Freiberg, Inst Geol, D-09596 Freiberg, GermanyUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoBirkle, P, Inst Invest Elect, Unidad Geotermia, AP 1-475, Cuernavaca 62001, Morelos, Mexico TI - The origin of reservoir fluids in the geothermal field of Los Azufres, Mexico - isotopical and hydrological indications AB - The calculation of hydrological balance resulted in a potential, average annual infiltration rate of 446 +/- 206 mm/m(2) for the Los Azufres geothermal area, which corresponds to a total of 82 x 10(6) m(3) per a. Due to the highly fractured and faulted structure of the volcanic formations, a considerable potential for the infiltration of recent meteoric water into deeper sections of the volcanic formations can be assumed. Isotopic data indicate the minor importance of recent meteoric water for the recharge of the geothermal reservoir. Very negative delta C-13 values can be explained by the input of organic C from the surface, but the lack of C-14 in the deep fluids reflects a pre-historic age for the infiltration event of fossil meteoric water. The dilution of the meteoric water by C-14-free CO2 gas from a shallow magma chamber complicates the exact age determination of the infiltration event, which probably occurred during the Late Pleistocene or Early Holocene glacial period. Strong water-rock interaction processes, such as sericitization/chloritization, caused the primary brine composition to be camouflaged. A preliminary hydrological model of the reservoir can be postulated as follows: the fossil hydrodynamic system was characterized by the infiltration of meteoric water and mixing with andesitic and/or magmatic water. Strong water-rock interaction processes in the main part of the production zone prove the existence of former active fluid circulation systems. Due to changes in pressure and temperature, the rising fluids get separated into liquid and vapour phases at a depth of 1500 in. After cooling, the main portions of both phases remain within the convective reservoir cycle. Isotope analyses of hot spring waters indicate the direct communication of the reservoir with the surface at some local outcrops. A recent reactivation of the hydrodynamic system is caused by the geothermal production, as indicated by the detection of lateral communication between some production and reinjection wells. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0883-2927 UR - ISI:000170841300002 L2 - METHANE; AQUIFER; SYSTEMS; CARBON SO - Applied Geochemistry 2001 ;16(14):1595-1610 2414 UI - 12712 AU - Biscay RJ AU - Mora CM AD - Univ La Habana, Dept Matemat Aplicada, Havana, CubaCtr Invest Matemat, Guanajuato, MexicoBiscay, RJ, Univ La Habana, Dept Matemat Aplicada, Havana, Cuba TI - Metric sample spaces of continuous geometric curves and estimation of their centroids AB - The metric sample space of Frechet curves (FRECHET, 1934, 1951, 1961) is based on a generalization of regular curves that covers continuous curves in full generality. This makes it possible to deal with both smooth and non-smooth, even non-rectifiable geometric curves in statistical analysis. In the present paper this sample space is further extended in two directions that are relevant in practice: to incorporate information on landmark points in the curves and to impose invariance with respect to an arbitrary group of isometric spatial transformations. Properties of the introduced sample spaces of curves are studied, specially those concerning to the generation and representation of random curves by random functions. In order to provide measures of central tendency and dispersion of random curves, centroids and restricted centroids of random curves are defined in a general metric framework, and methods for their consistent estimation are derived MH - Cuba MH - Mexico|Guanajuato PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000171438800002 L2 - curves;centroids;random curves;sample spaces;SHAPE SO - Mathematische Nachrichten 2001 ;229():15-49 2415 UI - 11633 AU - Biswas AK AU - Takahashi K AD - Third World Ctr Water Management, Atizapan, MexicoInt Dev Res Inst, Tokyo, JapanBiswas, AK, Third World Ctr Water Management, Atizapan, Mexico TI - Special thematic issue: Club of Tokyo - Editorial MH - Japan MH - Mexico|Estado De Mexico PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Water Resources U5 - J;Editorial Material AV - English IS - 0790-0627 UR - ISI:000174290800002 SO - International Journal of Water Resources Development 2001 ;17(4):479-480 2416 UI - 13046 AU - Blanchin-Roland S AU - Gonzalez C AU - Szabo R AU - Treton B AU - Gaillardin C AD - INRA, CNRS, INA PG, CBAI, F-78850 Thiverval Grignon, FranceCINVESTAV, Guanajuato, MexicoComenius Univ, Fac Sci, Dept Biochem, Bratislava 84215, Slovakia TI - Protease regulation in Yarrowia lipolytica: sensing pH, peptides, and more. MH - France MH - Mexico|Guanajuato MH - Slovakia PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Microbiology;Mycology U5 - J;Meeting Abstract AV - English IS - 0749-503X UR - ISI:000170442100339 SO - Yeast 2001 ;18():S195-S195 2417 UI - 13816 AU - Blanchon P AU - Eisenhauer A AD - Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, ICMyL, UA Puerto Morelos,Reef Syst Lab, Cacun 77500, Q Roo, MexicoUniv Kiel, Forschungszentrum Marine, GEOMAR, D-24148 Kiel, GermanyBlanchon, P, Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, ICMyL, UA Puerto Morelos,Reef Syst Lab, Ap Postal 1152, Cacun 77500, Q Roo, Mexico TI - Multi-stage reef development on Barbados during the Last Interglaciation AB - By mapping the vertical and lateral distribution of reefal facies on the west and south coast of Barbados we have produced a revised model of reef development for the Last Interglaciation. We find that reef architecture around Barbados has significant complexity including evidence for wave exposure-related variations in reef geometry and at least 3 stages of reef development that were controlled by variations in sea level. During the main stage of development, an Acropora palmata-dominated reef-crest aggraded similar to 22 m in response to a minimum sea-level rise of 20 m. During stage 2, a sea cave was cut 3-4 m above the fossil reef-crest, possibly indicating that reef growth was terminated before sea level reached the highstand. Similar sequences elsewhere in the Caribbean indicate that this early reef demise may not be a local phenomenon: several reefs apparently stopped growing between + 2 and + 4m and only in sheltered areas did they reach the highstand at + 6 m, as recorded by intertidal notches. This pattern of reef demise has previously been related to rapid sea-level rise at the end of the interglacial, but stratigraphic data are equivocal. The final stage of reef development on Barbados occurred when sea level began to fall. This fall was rapid, leaving a thin but widespread veneer of reel-crest deposits over the proximal reef-front, and discontinuous intertidal and shallow subtidal deposits capping the distal reef-front. Although further dating is required to differentiate these three stages, our only reliable U-Th TIMS date indicates that almost 50% of the exposed reef had accreted by 129 ka, giving an estimate of 15 ka for the main aggradational stage. Furthermore, reports of relict reef-crests buried beneath these exposed deposits indicate that our revised model is incomplete and that earlier stages of reef growth occurred during the Last Interglaciation. These earlier stages imply that sea-level was at an 'interglacial level' for as long as 20 ka - supporting the Devils Hole record of interglacial duration. Unfortunately, these estimates could not be verified directly because most of our U-Th data show major stratigraphic age reversals attributed to diagenesis. This pattern is also evident in all other well-dated reefal units in the Caribbean and leads us to conclude that only diagenetically screened, precise, stratigraphically consistent coral dates can be used to directly estimate the duration of the Last Interglaciation. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Quintana Roo PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0277-3791 UR - ISI:000168317600003 L2 - BRITISH-WEST-INDIES; HIGH-SEA-STANDS; FOSSIL CORAL-REEFS; GRAND-CAYMAN; PENULTIMATE DEGLACIATION; MASS-SPECTROMETRY; YOUNGER DRYAS; LEVEL RISE; AGES; DURATION SO - Quaternary Science Reviews 2001 ;20(10):1093-1112 2418 UI - 12361 AU - Blanco-Aguirre ME AU - Kofman-Alfaro SH AU - Rivera-Vega MR AU - Medina C AU - Valdes-Flores M AU - Rizzo WB AU - Cuevas-Covarrubias SA AD - UNAM, Fac Med, Gen Hosp, Serv Genet, Mexico City 06726, DF, MexicoVirginia Commonwealth Univ, Med Coll Virginia, Dept Pediat, Richmond, VA 23298, USAVirginia Commonwealth Univ, Med Coll Virginia, Dept Human Genet, Richmond, VA 23298, USACuevas-Covarrubias, SA, UNAM, Fac Med, Gen Hosp, Serv Genet, Dr Balmis 148 Col Doctores, Mexico City 06726, DF, Mexico TI - Unusual clinical presentation in two cases of multiple sulfatase deficiency AB - Multiple sulfatase deficiency (MSD) is an inborn error of metabolism that combines the clinical features of late infantile metachromatic leukodystrophy and mucopolysaccharidosis. The characteristic biochemical abnormality is a reduction in the activities of several sulfatases, with consequent tissue accumulation of sulfatides, sulfated glycosaminoglycans, sphingolipids, and steroid sulfates. In this study we present two unusual cases of MSD with variable enzymatic deficiency of arylsulfatases A, B, and C. Both patients had ichthyosis, broad thumbs and index fingers, an unusually slow progression of the neurologic symptoms, and lacked the hepatosplenomegaly that is typical of MSD. Olivopontocerebellar atrophy was present and one patient had a large retrocerebellar cyst. Mucopolysaccharides were not detected in the urine from either subject. Leukocyte arylsulfatase A activity in patient 1 was 0.46 nmol/mg protein/hr and in patient 2 was 0.0 nmol/mg protein/hr (normal 0.7-5.0 nmol/mg protein/hr). Leukocyte arylsulfatase B activity in patient 1 was 24 nmol/mg protein/hr and in patient 2 was 22 nmol/mg protein/hr (normal 115-226 nmol/mg protein/hr). Leukocyte arylsulfatase C in patient 1 was 0.30 pmol/mg protein/hr and in patient 2 was 0.28 pmol/mg protein/hr (normal 0.84 pmol/mg protein/hr). In conclusion, these two patients with MSD had mild clinical presentations not previously reported and variable enzymatic deficiency of arylsulfatases A, B, and C MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Dermatology;Pediatrics U5 - J;Article AV - English IS - 0736-8046 UR - ISI:000172198200005 L2 - METACHROMATIC LEUKODYSTROPHY; ARYLSULFATASE-A; FIBROBLASTS; LEUKOCYTES SO - Pediatric Dermatology 2001 ;18(5):388-392 2419 UI - 11896 AU - Blanco-Cano X AU - Russell CT AU - Strangeway RJ AU - Kivelson MG AU - Khurana KK AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico. Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USA TI - Galileo observations of ion cyclotron waves in the Io torus AB - Ion cyclotron waves generated near Io have been observed on four Galileo passes of the plasma torus, in December 1995, October 1999, November 1999, and February 2000. The waves have frequencies near the gyrofrequencies of SO2+ and SO+ ions, and are propagating at angles up to 401 to the ambient magnetic field. These waves are generated by ring-beam distributions of SO2+ and SO+ pickup ions. In some regions there are also waves with frequencies near the gyrofrequency of S+ ions. This suggests that ring-beam sulfur ions can also make the plasma unstable. We perform a kinetic dispersion analysis for a plasma with ring-beam SO+, SO+, and S+ pickup ions. We find that simultaneous growth of parallel propagating SO+, SO+, and S+ cyclotron waves is possible and that the dominant mode depends on the density of the ring-beams. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA T3 - IOAdvances in space research PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticle1SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSADV SPACE RESBT60N AV - English IS - 0273-1177 UR - ISI:000173496300002 SO - 2001 ;(10):1469-1474 2420 UI - 12387 AU - Blanco-Cano X AU - Russell CT AU - Strangeway RJ AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USABlanco-Cano, X, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - The Io mass-loading disk: Wave dispersion analysis AB - Ion cyclotron waves generated near Io have been detected by Galileo on December 7, 1995, October 11, 1999, November 26, 1999, and February 22, 2000. The waves are observed in the torus with frequencies near the gyrofrequencies of SO2+ and SO+ ions and propagate at angles up to 40' to the ambient magnetic field. The waves' properties are different on the four passes, and they change along each flyby, indicating that the torus composition is changing and that the spatial distribution of pickup ions is not uniform. While on December 1995 the waves had frequencies near the SO2+ gyrofrequency., on October 1999 and February 2000, spectra show peaks at the SO+ and the SO+ gyrofrequencies. The SO2+ waves had the largest amplitude 2 almost all the time during these days. On November 1999 there are few data points, and the SO+ waves had a larger amplitude than the SO+ waves. In some 2 regions there axe smaller-amplitude waves with frequencies near the gyrofrequency of S+ ions, and on flyby 127 some waves had frequencies centered at the H2S+ gyrofrequency. We perform kinetic dispersion analysis to explain the origin of the observed waves. We find that SO2+ and SO+ ion cyclotron waves can be generated 2 by ring-beam distributions of pickup ions. The maximum growth occurs at parallel propagation, but growth at oblique angles is significant. The dominant mode depends on the composition of the pickup ions. The SO+ waves can be dominant if the density of the SO+ pickup ions is greater or equal to twice the density of the SO+ ions. We present dispersion analysis for two cases; in the first one the SO2+ cyclotron mode is dominant in agreement with observations on December 7, 1995. In the second one the growth of SO+ waves is largest, resembling observations on October 11, 1999, and February 22, 2000. To explain the third peak observed in some spectra, we included a ring-beam of S+ ions and find that the S+ cyclotron wave becomes unstable when the ring-beam density is greater than or equal to 10% the density of the background S+ ions MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000172049300137 L2 - MIRROR-MODE STRUCTURES; CYCLOTRON WAVES; PLASMA TORUS; SO2+ SOURCE; GALILEO; FLYBY; ATMOSPHERE; EXOSPHERE; ENCOUNTER SO - Journal of Geophysical Research-Space Physics 2001 ;106(A11):26261-26275 2421 UI - 12994 AU - Blanco-Cano X AU - Russell CT AU - Huddleston DE AU - Strangeway RJ AD - UNAM, Inst Geofis, Dept Fis Espacial, Mexico City 04510, DF, MexicoUniv Calif Los Angeles, Dept Geophys & Planetary Phys, Los Angeles, CA 90024, USAHughes Space & Commun Co, El Segundo, CA, USABlanco-Cano, X, UNAM, Inst Geofis, Dept Fis Espacial, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Ion cyclotron waves near Io AB - In this work, we discuss the properties of the ion cyclotron waves observed by the Galileo spacecraft in the Io torus on December 7, 1995. These waves are generated by anisotropies in the pickup ion distributions present in the region. To zeroth order the waves grow at the sulfur dioxide gyrofrequency, are left-hand polarized and propagate along the magnetic field. A more detailed study reveals that in some regions the waves grow over a finite bandwidth, with frequencies near the SO+ and S+ gyro frequencies, propagate at an angle to the field, and are elliptically polarized. We perform a kinetic dispersion analysis and show that while the parallel propagating SO2+ cyclotron mode has the largest growth, oblique cyclotron waves can also grow with a significant rate in the multicomponent plasma near Io. We find that decreasing the sulfur dioxide pick-up ion density, and including a SO+ pickup component can lead to instabilities generated by the sulfur monoxide and sulfur components in the plasma, and to the observed bandwidth of frequencies. Therefore, it is possible that in addition to the waves generated by SO2+ pickup ions, in some regions Galileo observed ion cyclotron waves generated by anisotropic distributions of SO+ and S+ ions. When Voyager 1 flew by the torus in 1979 the spacecraft detected the Alfven wing but no cyclotron waves were observed in the data. We evaluate the group and phase velocities of ion cyclotron waves and find that both are smaller than the Alfven velocity. Then it is possible that the cyclotron waves can get carried away before they reach Voyager. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000170628900007 L2 - MIRROR-MODE STRUCTURES; PLASMA TORUS; VOYAGER-1 OBSERVATIONS; DISPERSION ANALYSIS; SO2+ SOURCE; FLYBY; INSTABILITY; ENCOUNTER SO - Planetary and Space Science 2001 ;49(10-11):1125-1136 2422 UI - 12051 AU - Blanco-Centurion CA AU - Salin-Pascual RJ AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoSecretaria Salud Mexico, Inst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoBlanco-Centurion, CA, Vet Adm Med Ctr W Roxbury, VFW Pkwy,Bldg 3,Room 2c-109, W Roxbury, MA 02132 USA TI - Extracellular serotonin levels in the medullary reticular formation during normal sleep and after REM sleep deprivation AB - Rapid eye movement (REM) sleep is hypothesized to result from the activity of REM sleep-generating and REM sleep-inhibiting neurons. The serotoninergic (5-HT) neurons of the dorsal raphe nucleus (DRN) represents one such population of REM-sleep inhibiting neurons since they are silent during REM sleep. Consistent with the decrease in activity of 5-HT neurons, the brain extracellular levels of 5-HT are lower during REM sleep compared to wakefulness. It is not known whether serotonin release is also reduced as a consequence of REM sleep rebound. Using microdialysis sampling coupled to HPLC-ECD, we measured the extracellular levels of 5-HT and its metabolite (5-HIAA) in the medial medullary reticular formation (mMRF) of freely behaving rats during normal sleep, REM sleep deprivation as well as during REM sleep rebound. We found that the levels 5-HT and 5-HIAA were significantly decreased by REM sleep deprivation. The reduction of 5-HT release was maintained during REM sleep rebound but the extracellular level of its main metabolite was increased. In addition, even during REM sleep rebound, 5-HT release during sleep was low compared to wakefulness. Taken together these data support the permissive role of 5-HT neurotransmission for REM sleep expression. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000173153100015 L2 - serotonin;REM sleep deprivation;medulla;microdialysis;DORSAL RAPHE NUCLEUS; C-FOS EXPRESSION; KNOCK-OUT MICE; PARADOXICAL SLEEP; BRAIN-STEM; PONTOMESENCEPHALIC TEGMENTUM; PARA-CHLOROPHENYLALANINE; HORSERADISH-PEROXIDASE; PERIAQUEDUCTAL GRAY; LUMBAR MOTONEURONS SO - Brain Research 2001 ;923(1-2):128-136 2423 UI - 13628 AU - Blanco-Centurion CA AU - Gerashchenko D AU - Greco MA AU - Salin-Pascual RJ AU - Shiromani PJ AD - Harvard Univ, Sch Med, Vet Adm Med Ctr W Roxbury, W Roxbury, MA, USAUniv Nacl Autonoma Mexico, Fac Med, Mexico City, DF, Mexico TI - DBH-saporin lesions the locus coeruleus, but does not produce cataplexy or abnormal REM sleep triggering MH - Mexico|Distrito Federal MH - USA PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000168230900215 SO - Sleep 2001 ;24():A130-A131 2424 UI - 12374 AU - Blanco G AU - Rodriguez-Estrella R AU - Merino S AU - Bertellotti M AD - Univ Saskatchewan, Dept Biol, Saskatoon, SK S7N 5E2, CanadaCSIC, Inst Invest Recursos Cinegeticos, Ciudad Real 13004, SpainCONACYT, Ctr Invest Biol Noroeste, La Paz 23000, BCS, MexicoCSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, E-28006 Madrid, SpainCSIC, Estac Biol Donana, Dept Appl Biol, Seville 41013, SpainBlanco, G, Univ Saskatchewan, Dept Biol, Saskatoon, SK S7N 5E2, Canada TI - Effects of spatial and host variables on hematozoa in white-crowned sparrows wintering in Baja California AB - A survey of blood parasites was conducted in February 1995 on white-crowned sparrows (Zonotrichia leucophrys) wintering in two environmentally different localities of Baja California Sur (Mexico). Blood parasite prevalence was higher in La Purisima (49%) than in San Jose del Cabo (8%), but there were no differences between ages or sexes within each locality. All haematozoan infections were by Haemoproteus coatneyi, except one bird in each site that were positive for Trypanosoma sp. We found no evidence for the predicted negative relationship between host body condition and intensity of parasitism. The relatively high prevalence in one site suggests that ari increase of hematozoa transmission may occur in that area MH - Canada MH - Mexico|Baja California Sur MH - Spain PB - LAWRENCE: WILDLIFE DISEASE ASSN, INC RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0090-3558 UR - ISI:000172135000014 L2 - blood parasites;effects on body condition;geographical variation;Haemoproteus coatneyi;white-crowned sparrow;Zonotrichia leucophrys;BLOOD PARASITES; AVIAN HEMATOZOA; EPIZOOTIOLOGY; POPULATIONS; INFESTATION; PREVALENCE; BIRDS SO - Journal of Wildlife Diseases 2001 ;37(4):786-790 2425 UI - 12240 AU - Blazquez J AU - Ruiz J AD - CIEMAT, Dept Nucl Fiss, E-28040 Madrid, SpainNatl Inst Nucl Res, ININ, Mex Toluca 52045, Ocoyoacac, MexicoBlazquez, J, CIEMAT, Dept Nucl Fiss, Av Complutense 22, E-28040 Madrid, Spain TI - A semiempirical prediction of the decay ratio for the boiling water reactors start-up process AB - During the start-up of a commercial boiling water reactor (BWR), the power and the coolant flow are continuously monitored. In order to prevent power instability events, the decay ratio (DR) could also be monitored. The process can be made safer if the operator could anticipate the DR too. DR depends on the power, the flow and many other quantities such as axial and radial neutron flux distribution, feed water temperature, void fraction, etc. A simple relationship for DR is derived. Three independent variables seem to be enough: the power, the flow and a single parameter standing for all other quantities which affect the DR. The relationship is validated with data from commercial BWR start-ups. A practical procedure for the start-up of a BWR is designed; it could help preventing instability events. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0029-5493 UR - ISI:000172589000016 L2 - MODEL; BWR SO - Nuclear Engineering and Design 2001 ;210(1-3):249-258 2426 UI - 13037 AU - Block DL AU - Puerari I AU - Knapen JH AU - Elmegreen BG AU - Buta R AU - Stedman S AU - Elmegreen DM AD - Univ Witwatersrand, Dept Computat & Appl Math, ZA-2001 Johannesburg, South AfricaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoIsaac Newton Grp Telescopes, Santa Cruz De La Palma 38700, SpainUniv Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, EnglandIBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598, USAUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAVassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604, USABlock, DL, Univ Witwatersrand, Dept Computat & Appl Math, 1 Jan Smuts Ave, ZA-2001 Johannesburg, South Africa TI - The gravitational torque of bars in optically unbarred and barred galaxies AB - The relative bar torques for 45 galaxies observed at K-band with the 4.2 m William Herschel Telescope are determined by transforming the light distributions into potentials and deriving the maximum ratios of the tangential forces relative to the radial forces. The results are combined with the bar torques for 30 other galaxies determined from our previous K-band survey (Buta & Block 2001). Relative bar torques determine the degree of spiral arm forcing, gas accretion, and bar evolution. They differ from other measures of bar strength, such as the relative amplitude of the bar determined photometrically, because they include the bulge and other disk light that contributes to the radial component of the total force. If the bulge is strong and the radial forcing large, then even a prominent bar can have a relatively weak influence on the azimuthal motions in the disk. Here we find that the relative bar torque correlates only weakly with the optical bar type listed in the Revised Shapley-Ames and de Vaucouleurs systems. In fact, some classically barred galaxies have weaker relative bar torques than classically unbarred galaxies. The optical class is a poor measure of azimuthal disk forcing for two reasons: some infrared bars are not seen optically, and some bars with strong bulges have their azimuthal forces so strongly diluted by the average radial force that they exert only small torques on their disks. The Hubble classification scheme poorly recognizes the gravitational influence of bars. Applications of our bar torque method to the high-redshift universe are briefly discussed MH - United Kingdom MH - Mexico|Puebla MH - South Africa MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000170645700006 L2 - galaxies : spiral;galaxies : structure;galaxies : fundamental parameters;galaxies : kinematics and dynamics;galaxies : general;SPIRAL GALAXIES; STELLAR DISK; FLOCCULANT; MORPHOLOGY; EVOLUTION; CLASSIFICATION; FREQUENCY; DYNAMICS; IMAGES; LIGHT SO - Astronomy & Astrophysics 2001 ;375(3):761-769 2427 UI - 13288 AU - Block DL AU - Puerari I AU - Takamiya M AU - Abraham R AU - Stockton A AU - Robson I AU - Holland W AD - Univ Witwatersrand, Dept Computat & Appl Math, ZA-2050 Wits, South AfricaInst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoGemini Observ, Hilo, HI 96720, USAUniv Toronto, Dept Astron, Toronto, ON M5S 3H8, CanadaUniv Hawaii, Inst Astron, Honolulu, HI 96822, USAJoint Astron Ctr, Hilo, HI 96720, USABlock, DL, Univ Witwatersrand, Dept Computat & Appl Math, Private Bag 3, ZA-2050 Wits, South Africa TI - Dust-penetrated morphology in the high-redshift universe: Clues from NGC 922 AB - Results from the Hubble Deep Field (HDF) North and South show a large percentage of high-redshift galaxies whose appearance falls outside traditional classification systems. The nature of these objects is poorly understood, but sub-mm observations indicate that at least some of these systems are heavily obscured (Sanders 2000). This raises the intriguing possibility that a physically meaningful classification system for high-redshift galaxies might be more easily devised at rest-frame infrared wavelengths, rather than in the optical regime. Practical realization of this idea will become possible with the advent of the Next Generation Space Telescope (NGST). In order to explore the capability of NGST for undertaking such science, we present NASA-IRTF and SCUBA observations of NGC 922, a chaotic system in our local Universe which bears a striking resemblance to objects such as HDF 2-86 (z = 0.749) in the HDF North. If objects such as NGC 922 are common at high-redshifts, then this galaxy may serve as a local morphological "Rosetta stone" bridging low and high-redshift populations. In this paper we demonstrate that quantitative measures of galactic structure are recoverable in the rest-frame infrared for NGC 922 seen at high redshifts using NGST, by simulating the appearance of this galaxy at redshifts z = 0.7 andz = 1.2 in rest-frame K'. While this object cannot be classified within any optical Hubble bin, simulated NGST images at these redshifts can be readily classified using the dust penetrated z similar to 0 template of Block & Puerari (1999) and Buta & Block (2001). The near-infrared disk of NGC 922 is not peculiar at all; rather, it is remarkably regular, even presenting spiral arm modulation, a characteristic signature of several grand design galaxies. Our results suggest that the capability of efficiently exploring the rest-wavelength IR morphology of high-z galaxies should probably be a key factor in deciding the final choice of instruments for the NGST MH - Canada MH - Mexico|Puebla MH - South Africa MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000169943200001 L2 - galaxies : spiral;galaxies : structure galaxies : kinematics and dynamics galaxies : individual (NGC 922) methods : numerical;CLERK-MAXWELL-TELESCOPE; BARRED SPIRAL GALAXIES; HUBBLE DEEP FIELD; STELLAR DISK; EVOLUTION; CLASSIFICATION; IMAGES; NORTH; SCUBA; NGST SO - Astronomy & Astrophysics 2001 ;371(2):393-403 2428 UI - 13439 AU - Blumberg HM AU - Jarvis WR AU - Soucie JM AU - Edwards JE AU - Patterson JE AU - Pfaller MA AU - Rangel-Frausto MS AU - Rinaldi MG AU - Saiman L AU - Wiblin RT AU - Wenzel RP AD - Emory Univ, Sch Med, Div Infect Dis, Dept Med, Atlanta, GA 30303, USAGrady Mem Hosp, Dept Epidemiol, Atlanta, GA, USACtr Dis Control & Prevent, Hosp Infect Program, Atlanta, GA, USAEmory Univ, Rollins Sch Publ Hlth, Dept Epidemiol, Atlanta, GA 30322, USAUniv Calif Los Angeles, Harbor Med Ctr, Dept Internal Med, Div Infect Dis, Los Angeles, CA 90024, USAUniv Texas, Hlth Sci Ctr, Dept Internal Med, Div Infect Dis, San Antonio, TX, USAUniv Iowa, Dept Internal Med, Div Gen Internal Med, Iowa City, IA 52242, USAUniv Iowa, Dept Pathol, Div Med Microbiol, Iowa City, IA 52242, USAInst Nacl Nutr, Div Hosp Epidemiol, Mexico City, DF, MexicoUniv Texas, Hlth Sci Ctr, Dept Pathol, Fungus Testing Lab, San Antonio, TX 78284, USAColumbia Univ, Dept Pediat, Div Infect Dis, New York, NY 10027, USAVirginia Commonwealth Univ, Med Coll Virginia, Dept Internal Med, Richmond, VA 23298, USABlumberg, HM, Emory Univ, Sch Med, Div Infect Dis, Dept Med, 69 Butler St, Atlanta, GA 30303 USA TI - Risk factors for candidal bloodstream infections in surgical intensive care unit patients: The NEMIS Prospective Multicenter Study AB - To assess risk factors for development of candidal blood stream infections (CBSIs), a prospective cohort study was performed at 6 sites that involved all patients admitted to the surgical intensive care unit (SICU) for >48 h over a 2-year period. Among 4276 such patients, 42 CBSIs occurred (9.82 CBSIs per 1000 admissions). The overall incidence was 0.98 CBSIs per 1000 patient days and 1.42 per 1000 SICU days with a central venous catheter in place. In multivariate analysis, factors independently associated with increased risk of CBSI included prior surgery (relative risk [RR], 7.3), acute renal failure (RR, 4.2), receipt of parenteral nutrition (RR, 3.6), and, for patients who had undergone surgery, presence of a triple lumen catheter (RR, 5.4). Receipt of an antifungal agent was associated with decreased risk (RR, 0.3). Prospective clinical studies are needed to identify which antifungal agents are most protective and which high-risk patients will benefit from antifungal prophylaxis MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 141 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000169387700007 L2 - NOSOCOMIAL FUNGAL-INFECTIONS; HOSPITAL-ACQUIRED CANDIDEMIA; BONE-MARROW TRANSPLANTATION; BLOOD-STREAM INFECTIONS; FLUCONAZOLE PROPHYLAXIS; NATIONAL EPIDEMIOLOGY; MULTIVARIATE-ANALYSIS; CONTROLLED TRIAL; CANCER-PATIENTS; MYCOSES SURVEY SO - Clinical Infectious Diseases 2001 ;33(2):177-186 2429 UI - 13682 AU - Blumenthal UJ AD - Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1E 7HT, EnglandNatl Inst Nutr, Dept Infect Dis, Mexico City, DF, MexicoBlumenthal, UJ, Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, Keppel St, London WC1E 7HT, England TI - The risk of enteric infections associated with wastewater reuse: the effect of season and degree of storage of wastewater AB - The effect of season and wastewater storage on the risk of Ascaris lumbricoides infection and diarrhoeal disease associated with wastewater reuse was studied in Mexico in 1991. Data were collected from 10 489 individuals during a dry-season survey. Exposure was to untreated wastewater, or effluent from 1 reservoir (less than or equal to 1 nematode egg/L), or no wastewater irrigation (control group). The results were compared with a previous rainy-season survey which included effluent from 2 reservoirs in series. Direct exposure to untreated wastewater was associated with an excess risk of A. lumbricoides infection in children aged < 5 years (OR = 18.0) and persons aged > 5 years (OR = 135) and an increased risk of diarrhoea, particularly to children aged < 5 years (OR = 1.75); effects were stronger in the dry than in the rainy season. There was also an excess risk associated with the I-reservoir group for A. lumbricoides infection (OR = 21 2 and 9.4) and for diarrhoeal disease (OR = 1.1 and 1.5) but little excess associated with the 2-reservoirs group. Therefore, wastewater retention in 1 reservoir (quality 10(5) faecal coliforms/100 mL, less than or equal to 1 egg/L) does not significantly reduce risks of Ascaris infection and diarrhoeal disease whereas retention in 2 reservoirs in series (quality 10(3) faecal coliforms/100 mL, no detectable eggs/L) does MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 14 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000168722700004 L2 - water reuse;wastewater treatment;irrigation;enteric infections;diarrhoeal disease;Ascaris;Mexico;WATER IRRIGATION SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2001 ;95(2):131-+ 2430 UI - 12338 AU - Bobadilla-del-Valle M AU - Ponce-de-Leon A AU - xenas-Huertero C AU - Vargas-Alarcon G AU - Kato-Maeda M AU - Small PM AU - Couary P AU - Ruiz-Palacios GM AU - Sifuentes-Osornio J AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infectol, Mexico City 14000, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoUniv Panamericana, Mexico City, DF, MexicoStanford Univ, Med Ctr, Stanford, CA 94305, USASifuentes-Osornio, J, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infectol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - rpoB gene mutations in rifampin-resistant Mycobacterium tuberculosis identified by polymerase chain reaction single-stranded conformational polymorphism AB - The use of polymerase chain reaction-single-stranded conformational polymorphism (PCR-SSCP) to study rpoB gene mutations in rifampin-resistant (RIFr) Mycobacterium tuberculosis has yielded contradictory results. To determine the sensitivity of this method, we analyzed 35 RIFr strains and 11 rifampin-susceptible (RIFs) strains, using the DNA sequencing of the core region of rpoB for comparison. Of the RIFr, 24 had a PCR-SSCP pattern identical to that of H37Rv; the other 11 had four different patterns. The 11 RIFs had PCR-SSCP patterns identical to that of H37Rv. The sensitivity of the assay was 31.4%; its specificity was 100%. We observed a strong correlation between the degree of resistance and the type of mutation MH - Mexico|Distrito Federal MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000172337900015 L2 - DRUG-RESISTANCE; BETA-SUBUNIT; STRAINS; DNA SO - Emerging Infectious Diseases 2001 ;7(6):1010-1013 2431 UI - 12826 AU - Bobadilla NA AU - Tack I AU - Tapia D AU - Sanchez-Lozada LG AU - Santamaria J AU - Jimenez F AU - Striker LJ AU - Striker GE AU - Herrera-Acosta J AD - Inst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City, DF, MexicoUniv Miami, Sch Med, Dept Med, Div Nephrol,Lab Renal Cell Biol, Miami, FL, USABobadilla, NA, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City, DF, Mexico TI - Pentosan polysulfate prevents glomerular hypertension and structural injury despite persisting hypertension in 5/6 nephrectomy rats AB - Five/six nephrectomy induces systemic and glomerular hypertension, glomerulosclerosis, proteinuria, and tubulointerstitial fibrosis. Polysulfate pentosan (PPS) decreases mesangial proliferation and extracellular matrix accumulation. The aim of this study was to determine whether PPS prevents glomerular hemodynamic changes and renal damage. Micropuncture studies were performed in three groups of eight male Wistar rats. Two groups included rats with 5/6 nephrectomy-one of which was treated with PPS in drinking water (100 mg/kg body wt) and the second of which received normal drinking water-and the third group consisted of normal rats that served as controls. Five/six nephrectomy produced systemic hypertension, a 50% reduction in GFR, and a 67% increase in single-nephron GFR due to elevated glomerular pressure and single-nephron plasma flow as well as proteinuria. Hypertension persisted in PPS-treated animals. Despite a similar reduction in GFR, PPS prevented the rise in single-nephron GFR, glomerular capillary hydrostatic pressure, and proteinuria. By morphometry, glomerular volume was increased by 46% and mesangial area by 94%. Fractional glomerular capillary area decreased by 24%. PPS prevented these changes. Tubular dilatation, epithelial cell atrophy, and increased interstitial area were largely prevented by PPS, as was the interstitial inflammatory infiltrate. These results suggest that the renal protection conferred by PPS was mediated both by prevention of glomerular hypertension as well as suppression of the inflammatory response. It was postulated that this was partly due to the preservation of a greater fraction of functional nephrons MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 8 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000171104000009 L2 - REMNANT KIDNEY MODEL; II RECEPTOR BLOCKADE; REDUCED RENAL MASS; MYCOPHENOLATE-MOFETIL; ANGIOTENSIN-II; DIETARY SUPPLEMENTATION; SUBTOTAL NEPHRECTOMY; SALT RESTRICTION; MESANGIAL CELLS; ABLATION SO - Journal of the American Society of Nephrology 2001 ;12(10):2080-2087 2432 UI - 13656 AU - Bocco G AU - Rosete F AU - Bettinger P AU - Velazquez A AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58090, Michoacan, MexicoUniv Michoacana, Fac Biol, Morelia 58240, Michoacan, MexicoOregon State Univ, Dept Forest Resources, Corvallis, OR 97331, USAUniv Nacl Autonoma Mexico, Inst Geog, Morelia 58090, Michoacan, MexicoBocco, G, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Rey Inchatiro 355,Colonia Vista Bella, Morelia 58090, Michoacan, Mexico TI - Developing a GIS program in rural Mexico - Community participation = success AB - We discuss results of a participatory project in an indigenous community in central Mexico, where a GIS program was implemented. The implementation is described in three ways: by system design, by training of community members, and by development of spatial databases. A variety of factors contributed to the success of the program development, including hands-on training sessions focused on CIS techniques that would support the development and automation of the community's forest management plan. As a result, the forest plan was fully automated by trainees, and the community subsequently obtained green certification for sustainable forest management MH - Mexico|Michoacan MH - USA PB - BETHESDA: SOC AMER FORESTERS RP - NOT IN FILE U3 - TC 2 U4 - Forestry U5 - J;Article AV - English IS - 0022-1201 UR - ISI:000168756700005 L2 - community forestry;education;GIS;sustainability;technology transfer SO - Journal of Forestry 2001 ;99(6):14-19 2433 UI - 12220 AU - Bohn M AU - Groh S AU - Khairallah MM AU - Hoisington DA AU - Utz HF AU - Melchinger AE AD - Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyPioneer Genet, F-68740 Nambsheim, FranceCIMMYT Int, Mexico City 06600, DF, MexicoBohn, M, Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany TI - Re-evaluation of the prospects of marker-assisted selection for improving insect resistance against Diatraea spp. in tropical maize by cross validation and independent validation AB - Cross validation (CV) and validation with an independent sample (IV) are new biometric approaches in QTL analysis to obtain unbiased estimates of QTL effects and the proportion of the genetic variance explained by the detected marker-QTL association (p). Our objective with these methods was to obtain a realistic picture on the prospects of marker-assisted selection (MAS) for improving the resistance of maize against the tropical stem borer species Diatraea grandiosella (SWCB) and Diatraea saccharalis (SCB). Published QTL mapping studies on leaf-damage ratings (LDR) with populations of F-2:3 lines and recombinant inbred lines (RIL) from crosses CML131xCML67 and Ki3x CML139 of tropical maize inbreds were re-analyzed with CV and IV. With CV, the reduction in p for LDR compared to p obtained with the whole data set varied between 41.0 and 79.6% in the populations of F-2:3 lines and between 30.1 and 65.2% in the two populations of RIL. Estimates of p for SCB LDR were similar for CV and IV. For SWCB LDR, p estimates obtained with IV were larger than those obtained with CV in CML131x CML67. The reverse was observed for Ki3xCML139. Under the assumption of identical selection intensities, and based on the re-estimates of p, MAS using only molecular marker information is less-efficient than conventional phenotypic selection (CPS). MAS combining marker and phenotypic data increases the relative efficiency by only 4% in comparison to CPS. In conclusion, MAS for improving SWCB and SCB LDR seems not-promising unless additional QTLs with proven large effects are available or the costs of marker assays are considerably reduced MH - France MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000172530400028 L2 - insect resistance;QTL;cross validation;maize;marker-assisted selection (MAS);QUANTITATIVE TRAIT LOCI; EARLY GENERATION SELECTION; SIMPLE REGRESSION METHOD; LEAF FEEDING RESISTANCE; GENOMIC REGIONS; QTL; IMPROVEMENT; POPULATION; GENOTYPES; VARIANCE SO - Theoretical and Applied Genetics 2001 ;103(6-7):1059-1067 2434 UI - 12218 AU - Bohorova N AU - Frutos R AU - Royer M AU - Estanol P AU - Pacheco M AU - Rascon Q AU - McLean S AU - Hoisington D AD - CIMMYT, Mexico City 06600, DF, MexicoCIRAD, F-34398 Montpellier 5, FranceHoisington, D, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Novel synthetic Bacillus thuringiensis cry1B gene and the cry1B-cry1Ab translational fusion confer resistance to southwestern corn borer, sugarcane borer and fall armyworm in transgenic tropical maize AB - In order to develop a resistance management strategy to control tropical pests based on the co-expression of different toxins, a fully modified Bacillus thuringiensis cr1B gene and the translational fusion cry1B-cry1Ab gene have been developed. Both constructs were cloned under the control of a maize ubiquitin-1 or a rice actin-1 promoter and linked to the bar gene driven by the CaMV 35S promoter. Immature embryos from the tropical lines CML72, CML216, and their hybrids, were used as the target for transformation by microprojectile bombardment. Twenty five percent of the transformed maize plants with cry1B expressed a protein that is active against southwestern corn borer and sugarcane borer. Ten percent of the transgenic maize expressed single fusion proteins from the translational fusion gene cry1B-1Ab and showed resistance to these two pests as well as to the fall armyworm. Transgenic maize plants that carried the cry1B gene in T1 to T3 progenies transmitted trangenes with expected Mendelian segregation and conferred resistance to the two target insects. Molecular analyses confirmed the cn, genes integration. the copy number, the size of protein(s) expressed in maize plants, the transmission, and the inheritance of the introduced cry gene. These new transgenic products will provide another recourse for reducing the build-up of resistance in pest populations, MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000172530400001 L2 - tropical maize;transformation;plant regeneration;insect resistance;Bacillus thuringiensis (Bt);CRYSTAL PROTEIN GENES; MESSENGER-RNA; INSECTICIDAL PROTEIN; DELTA-ENDOTOXIN; PLANT GENES; EXPRESSION; PROTOPLASTS; TRANSFORMATION; REGENERATION; BOMBARDMENT SO - Theoretical and Applied Genetics 2001 ;103(6-7):817-826 2435 UI - 13965 AU - Boivin X AU - Nowak R AU - Garcia AT AD - INRA Theix, ACS, URH, F-63122 St Genes Champanelle, FranceINRA, Lab Comportement Anim, CNRS, URA 1291, F-37380 Nouzilly, FranceUAQ Juriquilla, Ctr Neurobiol, Queretaro 76001, MexicoBoivin, X, INRA Theix, ACS, URH, F-63122 St Genes Champanelle, France TI - The presence of the dam affects the efficiency of gentling and feeding on the early establishment of the stockperson-lamb relationship AB - This experiment investigates how the maternal presence influences the effect of additional human contact in early age on the reaction of lambs to their stockperson. Forty twin-born lambs were involved in this experiment during their first 4 days of life. Ten pairs of twins were reared artificially from 12 h of age. One of each litter (AF, n = 10) received 6.5 +/- 0.7 sessions of 30 min of separation from the twin (with a wire fence) with 5 min of gentling and feeding (suckling from a bottle and from a bucket fitted with a rubber teat). The other twin was not treated. Ten pairs of twins were reared with their dam and received 6.6 +/- 0.7 sessions of treatment. One twin (MAF, n = 10) received the same treatment as AF. The other twin (M, n = 10) was separated for 30 min from the dam and had no human contact. From the age of 70 +/- 7 h, lambs were tested in a social isolation test (alone for 1 min, with the familiar stockman for 2 min, alone again for 1 min), in a Preference test (2 min) between an unfamiliar maternal ewe and the familiar stockman, and, for the AF lambs only, in a Preference test (2 min) between their familiar and an unfamiliar stockman. Eight AF lambs learned to suck on their own from the bucket of milk by the end of the experiment compared to only one MAF (P < 0.001), AF lambs approached the human more (P < 0.01), vocalised less (P < 0.01) and walked less (P < 0.01) during the social isolation test than animals reared with their mother (M and MAF). AF did not show any preference between the stockman and the unfamiliar maternal ewe while M and MAF lambs chose the ewe (P < 0.05). AF lambs discriminated the familiar from an unfamiliar stockman only if they had learned to suck from the bucket during the treatment. Nevertheless MAF lambs vocalised less than M (P < 0.05) in the presence of the stockman during the social isolation test, indicating a possible reduction of isolation distress. These results show that artificially reared lambs are preferentially motivated to interact with a familiar human after only a few days of contact. Moreover, they highlight the difficulty in using a feeding reward to improve the human-lamb relationship when lambs are reared permanently with their dame. However, the results suggest that early gentling improves the human-animal relationship whatever the maternal environment. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Agriculture, Dairy & Animal Science;Behavioral Sciences;Veterinary Sciences U5 - J;Article AV - English IS - 0168-1591 UR - ISI:000167978700001 L2 - sheep-handling;human-animal relationships;artificial rearing;gentling;learning;social development;NEONATAL RATS; HUMANS; CATTLE; MILK; DISCRIMINATION; PREFERENCE; RESPONSES; BEHAVIOR; ANIMALS; MOTHER SO - Applied Animal Behaviour Science 2001 ;72(2):89-103 2436 UI - 12130 AU - Bojdecki T AU - Gorostiza LG AD - Warsaw Univ, Math Inst, PL-02097 Warsaw, PolandCtr Invest Estud Avanzados, Dept Matemat, Mexico City 07000, DF, Mexico TI - Trajectorial fluctuations and time-localization of Cox systems of independent motions AB - We obtain high-density fluctuation limits for the trajectories of the motions in Cox systems of independent motions in R-d. The motions are quite general including a large class of diffusions, Brownian bridges and fractional Brownian motions. The limits take values in a space of distributions on Wiener space and in general are non-Gaussian. We give two examples and discuss time-localizations of the trajectorial results MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0019-3577 UR - ISI:000172710000001 L2 - BROWNIAN MOTIONS; WIENER SPACE; DENSITY SO - Indagationes Mathematicae-New Series 2001 ;12(2):139-145 2437 UI - 12926 AU - Bojdecki T AU - Gorostiza LG AD - Warsaw Univ, Math Inst, PL-02097 Warsaw, PolandCINVESTAV, Dept Math, Mexico City 07000, DF, MexicoBojdecki, T, Warsaw Univ, Math Inst, Ul Banacha 2, PL-02097 Warsaw, Poland TI - Self-intersection local time for some S '(R-d)-Ornstein-Uhlenbeck processes related to inhomogeneous fields AB - We study existence and path continuity of the self-intersection local time (SILT) for some S' (R-d)-valued Ornstein-Uhlenbeck processes. Examples of such processes arise in particular as fluctuation limits of particle systems. We analyze the effect that different types of measures involved in the covariances of the processes have on existence and continuity of SILT. These measures do not necessarily have the regularity and homogeneity proper-ties of those that have been considered before; this precludes some key ingredients of the previous techniques. We develop new technical tools and prove sufficient conditions and some necessary conditions for existence of SILT, and sufficient conditions for path continuity of SILT. The questions of existence and continuity involve problems of existence of integrals and singular integrals. We give examples which illustrate how different types of measures (e.g., atomic or with L-2-density) may produce different critical dimensions for existence of SILT. One of our motivations is the desire for a better understanding of what SILT represents for S'(R-d)-valued processes MH - Mexico|Distrito Federal MH - Poland PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000170870600002 L2 - self-intersection local time;Ornstein-Uhlenbeck process;tempered distribution;Fourier transform;INFINITE SYSTEMS; BROWNIAN MOTIONS; PARTICLE-SYSTEMS; NUCLEAR-SPACE; EQUATIONS SO - Mathematische Nachrichten 2001 ;228():47-83 2438 UI - 13465 AU - Bolanos-Garcia VM AU - Ramos S AU - Castillo R AU - Xicohtencatl-Cortes J AU - Mas-Oliva J AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Cambridge, Dept Biochem, Cambridge, EnglandNatl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoCastillo, R, Univ Nacl Autonoma Mexico, Inst Fis, POB 20-364, Mexico City 01000, DF, Mexico TI - Monolayers of apolipoproteins at the air/water interface AB - Human apolipoproteins All, CIII, E3, and AI were studied from different points of view: secondary structure prediction analysis, protein stability to overcome and revert thermal denaturation, and phase behavior of their monolayer. We found a well-preserved relationship among the predicted secondary structure, amphipatic cl-helices, and the ability to recover their secondary protein structure after thermal treatment. With each one of the apolipoproteins studied, the equilibrium character of the unfolding process and the presence of isochromatic points suggested a two-state character for the process. Pressure-area isotherms were carried out, as well as direct observations with a Brewster angle microscope of the apolipoproteins monolayers deposited onto a highly ionic water subphase. We described the gas/liquid-phase transition in all of these proteins. The apolipoproteins Al and All present a phase transition between two condensed phases at high lateral pressures. A model of the secondary structure for these proteins is presented MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000169371500026 L2 - BREWSTER-ANGLE MICROSCOPY; HIGH-DENSITY-LIPOPROTEIN; STEARIC-ACID MONOLAYER; IN-SITU OBSERVATION; A-II; CHOLESTEROL ACYLTRANSFERASE; PLASMA-LIPOPROTEINS; HYDROPHOBIC MOMENT; PHASE-TRANSITIONS; TRANSGENIC MICE SO - Journal of Physical Chemistry B 2001 ;105(24):5757-5765 2439 UI - 13051 AU - Bolotin YL AU - Gonchar VY AU - Krokhin AA AU - Hernandez-Tejeda PH AU - Tur A AU - Yanovsky VV AD - Kharkov Phys & Technol Inst, Natl Sci Ctr, UA-310108 Kharkov, UkraineUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoCtr Etud Spatiale Rayonnements, F-31028 Toulouse, FranceKharkov Single Crystals Inst, UA-310001 Kharkov, UkraineBolotin, YL, Kharkov Phys & Technol Inst, Natl Sci Ctr, UA-310108 Kharkov, Ukraine TI - Local and global control of high-period unstable orbits in reversible maps AB - We study the nonlinear dynamics of a complex system, described by a two-dimensional reversible map. The phase space of this map exhibits elements typical of Hamiltonian systems (stability islands) as well as of dissipative systems (attractor). Due to the interaction between the stability islands and the attractor, the transition to chaos in this system occurs through the collapse of the stability island and stochastization of the limiting-cycles orbits. We show how to apply the method of discrete parametric control to stabilize unstable high-period orbits. To achieve highly efficient control we introduce the concepts of local and global control. These concepts are useful in situations where there are "dangerous" points on the target orbit, i.e., the points where the probability of breakdown of control is high. As a result, the dangerous points turn out to be much more sensitive to external noise than other points on the orbit, and only the dangerous points determine how effective the control is MH - France MH - Mexico|Puebla MH - Ukraine PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000170493100051 L2 - CHAOTIC DYNAMICAL-SYSTEMS; ATTRACTORS; COMPLEXITY SO - Physical Review e 2001 ;6402(2): 2440 UI - 12046 AU - Boltyanski V AU - Aguilar HG AD - Russian Acad Sci, Steklov Math Inst, Moscow 117966, RussiaCtr Invest Matemat, Guanajuato, MexicoBoltyanski, V, Russian Acad Sci, Steklov Math Inst, Ul Gubkina 8, Moscow 117966, Russia TI - Fixing and hindering systems of planar convex figures MH - Mexico|Guanajuato MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1064-5624 UR - ISI:000173193600025 L2 - BODIES SO - Doklady Mathematics 2001 ;64(3):385-387 2441 UI - 14404 AU - Boltyanski V AU - Martini H AD - CIMAT, Guanajuato 36000, MexicoTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyBoltyanski, V, CIMAT, AP 402, Guanajuato 36000, Mexico TI - Caratheodory's theorem and H-convexity AB - In 1976, V. Boltyanski introduced the functional md for compact, convex bodies. With the help of this functional, some theorems of combinatorial geometry were derived. For example. the first author obtained a Helly-type theorem, later some particular cases of the Szokefalvi-Nagy problem were resolved. Further on, exact estimates for the cardinalities of primitive fixing and hindering systems of compact, convex bodies were established. etc. In this article. we discuss the connection of the classical Caratheodory Theorem with the functional md. (C) 2001 Academic Press MH - Germany MH - Mexico|Guanajuato PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0097-3165 UR - ISI:000166714700006 L2 - Caratheodory's Theorem;convex hull;H-convexity;functional md SO - Journal of Combinatorial Theory Series A 2001 ;93(2):292-309 2442 UI - 11742 AU - Bombal F AU - Fernandez M AU - Villanueva I AD - Univ Complutense Madrid, Fac Matemat, Dept Anal Matemat, E-28040 Madrid, SpainCIMAT, Guanajuato 36000, Gto, MexicoBombal, F, Univ Complutense Madrid, Fac Matemat, Dept Anal Matemat, E-28040 Madrid, Spain TI - Some classes of multilinear operators on C(K) spaces AB - We obtain a classification of projective tensor products of C(K) spaces according to whether none, exactly one or more than one factor contains copies of 1, in terms of the behaviour of certain classes of multilinear operators on the product of the spaces or the verification of certain Banach space properties of the corresponding tensor product. The main tool is an improvement of some results of Emmanuele and Hensgen on the reciprocal Dunford-Pettis and Pelczynski's (V) properties of the projective tensor product of Banach spaces. We also study relationships between several classes of multilinear operators and the associated linear operators MH - Mexico|Guanajuato MH - Spain PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0039-3223 UR - ISI:000173962600005 L2 - tensor products;C(K) spaces;BANACH-SPACES; MAPPINGS SO - Studia Mathematica 2001 ;148(3):259-273 2443 UI - 13408 AU - Bombal F AU - Fernandez-Unzueta M AU - Villanueva I AD - Univ Complutense Madrid, Fac Matemat, Dept Anal Matemat, E-28040 Madrid, SpainCIMAT, Guanajuato 36000, MexicoBombal, F, Univ Complutense Madrid, Fac Matemat, Dept Anal Matemat, E-28040 Madrid, Spain TI - Unconditionally converging multilinear operators AB - We introduce a notion of unconditionally converging multilinear operator which allows to extend many of the results of the linear case to the multilinear case. We prove several characterizations of these multilinear operators (one of which seems to be new also in the linear case), which allow to considerably simplify the work with this kind of operators MH - Mexico|Guanajuato MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000169505900001 L2 - unconditionally converging;multilinear operators;weakly unconditionally Cauchy series;BANACH-SPACES SO - Mathematische Nachrichten 2001 ;226():5-15 2444 UI - 12082 AU - Bonilla E AU - Parraga M AU - Lopez LA AU - Escolar F AU - del Mazo J AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, CBS, Mexico City 09340, DF, MexicoCSIC, Ctr Invest Biol, Barcelona, Spain TI - Copper-zinc superoxide dismutase is highly expressed in oocytes exposed to mono(2-ethylhexyl) phthalate (MEHP) MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000172372500627 SO - Molecular Biology of the Cell 2001 ;12():115A-115A 2445 UI - 12615 AU - Bonilla HR AD - Univ Autonoma Baja Calif Sur, Dept Biol Marina, La Paz, BCS, MexicoBonilla, HR, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Effects of the 1997-1998 El Nino-southern oscillation on coral communities of the Gulf of California, Mexico AB - The extensive bleaching and massive mortality suffered by reef corals in Costa Rica, Panama, Colombia and the Galapagos Islands (Ecuador), due to the increase of temperature caused by the El Nino-Southern Oscillation (ENSO) event of 1982-83, have been extensively characterized. However, ENSO effects and perturbations on other eastern Pacific reef localities are almost unknown. The objective of this paper is to describe the responses of six coral assemblages of the southern Gulf of California (27 degreesN to 23 degreesN) to the elevated temperatures of the 1997-98 ENSO, one of the strongest of the century. In July 1997, partial and full bleaching were first observed in colonies of Pocillopora spp. at Cabo Pulmo reef (23.5 degreesN), By the following month, with sea temperatures of 30 degrees to 31 degreesC, loss of color was observed in four of the genera present in the region (including Porites, Pavona and Psammocora). In October 1997, bleaching was observed in coral communities from 27 degreesN to the entrance of the Gulf of California, but after November, when sea surface temperatures dropped to 29 degreesC or less, no further bleaching or mortality were observed. When ENSO warming was at its peak (September 1997) coral cover of 30.08% +/- 2.86 (mean and SE) had bleached in the study region and by the end of the year, 18.15% +/- 1.76 of the total cover was dead. Bleaching intensity was homogeneous between depths of 0 to 12 m, but coral mortality was significantly higher in shallow areas. The 1997-98 bleaching event was the strongest documented in the Gulf of California, but its effects were far less than those observed at Nayarit, Mexico (20 degreesN) in the same years, or in the equatorial eastern Pacific during 1982-83. This attenuated response may be due to temperatures higher than 30 degreesC recorded in the southern gulf only from August to November in 1997, and in August 1998. This pattern also has been observed in this region during the 1957-58, 1972-73 and 1982-83 ENSO events. The infrequent presence of extreme positive temperature anomalies in the Gulf of California may have allowed corals and reefs to sustain their growth and accretion, in contrast to coral communities in other areas of the eastern Pacific region MH - Mexico|Baja California Sur MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000171653300016 L2 - GALAPAGOS-ISLANDS ECUADOR; CABO-PULMO REEF; EASTERN PACIFIC; COSTA-RICA; OF-CALIFORNIA; PANAMA; REPRODUCTION; AGARICIIDAE; TEMPERATURE; OCEAN SO - Bulletin of Marine Science 2001 ;69(1):251-266 2446 UI - 14174 AU - Bonvicini V AU - Giubellino P AU - Idzik M AU - Kolojvari A AU - Montano LM AU - Nouais D AU - Petta C AU - Randazzo N AU - Rashevsky A AU - Reito S AU - Tosello F AU - Vacchi A AD - Ist Nazl Fis Nucl, Sez Torino, I-100125 Turin, ItalyIst Nazl Fis Nucl, Sez Trieste, Trieste, ItalyIst Nazl Fis Nucl, Sez Catania, I-95129 Catania, ItalySt Petersburg State Univ, St Petersburg, RussiaCINVESTAV, Mexico City 14000, DF, MexicoGiubellino, P, Ist Nazl Fis Nucl, Sez Torino, Via Pietro Giuria 1, I-100125 Turin, Italy TI - Beam test of a very large area linear silicon drift detector AB - We report the results of the first beam test of one of the very large area silicon drift detector prototypes produced for the ALICE Inner Tracking System. The main parameters describing the overall detector performance are discussed, including data on efficiency, charge collection and linearity of the detector. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000167304900012 L2 - CHAMBERS; OBELIX SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2001 ;459(3):494-501 2447 UI - 12126 AU - Boreskov KG AU - Vieyra JCL AU - Turbiner AV AD - Inst Theoret & Expt Phys, Moscow 117259, RussiaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Paris Sud, Phys Theor Lab, Paris, FranceBoreskov, KG, Inst Theoret & Expt Phys, Moscow 117259, Russia TI - Solvability of the F-4 integrable system AB - It is shown that the F-4 rational and trigonometric integrable systems are exactly-solvable for arbitrary values of the coupling constants. Their spectra are found explicitly while eigenfunctions are by pure algebraic means. For both systems new variables are introduced in which the Hamiltonian has an algebraic form being also (block)-triangular. These variables are invariant with respect to the Weyl group of F-4 root system and can be obtained by averaging over an orbit of the Weyl group. An alternative way of finding these variables exploiting a property of duality of the F-4 model is presented. It is demonstrated that in these variables the Hamiltonian of each model can be expressed as a quadratic polynomial in the generators of some infinite-dimensional Lie algebra of differential operators in a finite-dimensional representation. Both Hamiltonians preserve the same flag of spaces of polynomials and each subspace of the flag coincides with the finite-dimensional representation space of this algebra. (quasi-exactly-solvable generalization of the rational F-4 model depending on two continuous and one discrete parameters is found MH - France MH - Mexico|Distrito Federal MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000172793600003 L2 - SUTHERLAND MODELS; LIE-ALGEBRAS; BODY PROBLEM; QUANTUM; CALOGERO SO - International Journal of Modern Physics A 2001 ;16(29):4769-4801 2448 UI - 14183 AU - Borges-Argaez R AU - Medina-Baizabal L AU - May-Pat F AU - Waterman PG AU - Pena-Rodriguez LM AD - Ctr Invest Cient Yucatan AC, Unidad Biotecnol, Grp Quim Organ, Merida 97200, Yucatan, MexicoUniv Strathclyde, Dept Pharmaceut Sci, Phytochem Res Labs, Glasgow G1 1XW, Lanark, ScotlandPena-Rodriguez, LM, Ctr Invest Cient Yucatan AC, Unidad Biotecnol, Grp Quim Organ, Calle 43 130,Colonia Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Merilactone, an unusual C-19 metabolite from the root extract of Chiococca alba AB - A C-19 metabolite has been isolated from the methanol extract of the roots of Chiococca alba and characterized as a new nor-seco-pimarane, to which we have given the trivial name merilactone (1). The structure and relative stereochemistry of 1 was established by spectral data interpretation MH - Mexico|Yucatan MH - United Kingdom PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000167257100021 SO - Journal of Natural Products 2001 ;64(2):228-231 2449 UI - 13222 AU - Borges FR AU - Magdalenic R AU - Sanchez R AU - Fromow J AU - Guerrero-Naranjo JL AU - Martinez CS AU - Chacon CV AU - Quiroz-Mercado H AU - Humayum M AD - Natl Autonomous Univ Mexico, Asociac Para Evitar Ceguera Mexico, Mexico City, DF, MexicoWilmer Eye Inst, Baltimore, MD, USA TI - Enzimatic vitreolysis with hyaluronidase previous to pneumatic retinopexy MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392102245 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S422-S422 2450 UI - 13148 AU - Borgstein J AU - Watine J AD - Hop Gen, Lab Biol Polyvalente, Rodez, FranceUNAM, Natl Inst Resp Dis, Mexico City, DF, MexicoWatine, J, Hop Gen, Lab Biol Polyvalente, Rodez, France TI - Feudal lords of science and medicine MH - France MH - Mexico|Distrito Federal PB - SAN FRANCISCO: B M J PUBLISHING INC RP - NOT IN FILE U3 - TC 3 U4 - Medicine, General & Internal U5 - J;Editorial Material AV - English IS - 0093-0415 UR - ISI:000170142200026 SO - Western Journal of Medicine 2001 ;175(2):139-140 2451 UI - 13707 AU - Borgstein J AD - Acad Hosp Rotterdam Dijkzigt, Dept Pediat Otolaryngol, AZR, Rotterdam, NetherlandsNatl Inst Resp Dis, Res Unit, Mexico City, DF, MexicoBorgstein, J, Acad Hosp Rotterdam Dijkzigt, Dept Pediat Otolaryngol, AZR, Rotterdam, Netherlands TI - Prevention of meatal stenosis after aural surgery in children MH - Mexico|Distrito Federal MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Otorhinolaryngology U5 - J;Letter AV - English IS - 0023-852X UR - ISI:000168618900033 SO - Laryngoscope 2001 ;111(5):928-928 2452 UI - 14092 AU - Borgstein J AD - Univ Rotterdam Hosp, NL-3015 GD Rotterdam, NetherlandsNatl Inst Resp Dis, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoBorgstein, J, Univ Rotterdam Hosp, Dr Molewaterpl 60, NL-3015 GD Rotterdam, Netherlands TI - A sense sf language MH - Mexico|Distrito Federal MH - Netherlands PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 1 U4 - Medicine, General & Internal U5 - J;Editorial Material AV - English IS - 0140-6736 UR - ISI:000167791500037 SO - Lancet 2001 ;357(9261):1036-1037 2453 UI - 11824 AU - Borja V AU - Bell R AU - Harding JA AD - Univ Loughborough, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, EnglandUniv Nacl Autonoma Mexico, Fac Ingn, Ctr Diseno & Manufactura, Mexico City 04510, DF, MexicoHarding, JA, Univ Loughborough, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, England TI - Assisting design for manufacture using the data model driven approach AB - The data model driven approach argues that computer aided engineering systems should be based on information data models in order to properly support the concurrent design of products. These models are the foundation for database representations of products and factories, and enable information sharing across unlinked software applications that address different stages of the product life cycle. This paper presents a product data model capable of capturing product life cycle information, and in particular its utilization for representing manufacturing information is described. A manufacturing data model that depicts the capabilities of manufacturing cells in terms of their processes and resources is also introduced. The potential benefits of using these data models to support design for manufacture are shown through a case study. The case study includes implementation of the models, their utilization representing a product and three manufacturing facilities, and demonstrates their value in the redesign of a component MH - United Kingdom MH - Mexico|Distrito Federal PB - BURY ST EDMUNDS: PROFESSIONAL ENGINEERING PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Manufacturing;Engineering, Mechanical U5 - J;Article AV - English IS - 0954-4054 UR - ISI:000173660600009 L2 - data model driven design;product models;design for manufacture;redesign;ENTERPRISE; SYSTEMS SO - Proceedings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture 2001 ;215(12):1757-1771 2454 UI - 14188 AU - Borja V AU - Harding JA AU - Bell R AD - Univ Loughborough, Dept Mfg Engn, Loughborough LE11 3YU, Leics, EnglandUniv Nacl Autonoma Mexico, Fac Ingn, Dept Ingn Mecan, Mexico City 04510, DF, MexicoHarding, JA, Univ Loughborough, Dept Mfg Engn, Loughborough LE11 3YU, Leics, England TI - A conceptual view on data-model driven reverse engineering AB - The effectiveness of process models is dependent on the data sharing capability of the CAE system that supports the design process. This assertion is considered in the context of design using Reverse Engineering (RE) techniques, where RE is considered to be a particular type of redesign. Two main categories of information are considered: product-related information, captured in product models, and details of manufacturing capabilities, provided from manufacturing models. This paper reports on conceptual work, which underpins the research and also presents details of a case study, carried out in an industrial context to verify the concepts MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Industrial;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7543 UR - ISI:000167318100005 L2 - SYSTEMS SO - International Journal of Production Research 2001 ;39(4):667-687 2455 UI - 13689 AU - Borovikov VA AU - Gridin D AD - Benemerita Univ Autonoma Puebla, Puebla 72570, MexicoS Bank Univ, Sch Elect Elect & Informat Engn, Ctr Waves & Fields, London SE1 0AA, EnglandBorovikov, VA, Benemerita Univ Autonoma Puebla, Puebla 72570, Mexico TI - Kiss singularities of Green's functions of non-strictly hyperbolic equations AB - Singularities of Green's functions of non-strictly hyperbolic equations with constant coefficients are studied. For certain values of the coefficients, two sheets of the slow ness surface may touch tangentially, leading to a tangential contact of the corresponding sheets of the characteristic cone. It is shown that the tangential manifold does not lead to a new singular surface of Green's function. A singularity of Green's function near the tangential manifold of the characteristic cone is called the kiss singularity. In general, it does not coincide with the sum of regular singularities for the two sheets. A new method is developed to describe the singularity. It employs a special treatment of the integral representation of Green's function, which allows us to obtain the kiss singularity as a sum of three terms. The first term is similar to the regular case, the second is expressed as an integral of special type, and the third is sometimes required for the analyticity of Green's function outside the characteristic cone. It has been demonstrated by considering several examples that the integral term may often be evaluated analytically. The method developed may be useful in problems of anisotropic wave propagation MH - United Kingdom MH - Mexico|Puebla PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 3 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1364-5021 UR - ISI:000168646200003 L2 - kiss singularity;non-strictly hyperbolic equations;Green's function;anisotropy SO - Proceedings of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 2001 ;457(2009):1059-1077 2456 UI - 13999 AU - Borowiec AZ AU - Coutino GAV AD - Univ Wroclaw, Inst Fizyki Teoretycznej, PL-50204 Wroclaw, PolandUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoBorowiec, AZ, Univ Wroclaw, Inst Fizyki Teoretycznej, PL-50204 Wroclaw, Poland TI - Hopf modules and their duals AB - Free Hopf modules and bimoduIes over a bialgebra are studied. We investigate a duality in the category of bimodules in this context. This gives the correspondence between Woronowicz's quantum Lie algebra and algebraic vector fields MH - Mexico|Distrito Federal MH - Poland PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000167822800006 L2 - QUANTUM GROUPS; DIFFERENTIAL CALCULI; VECTOR-FIELDS; CATEGORIES SO - International Journal of Theoretical Physics 2001 ;40(1):67-80 2457 UI - 13130 AU - Borowsky E AU - Gafni E AU - Lynch N AU - Rajsbaum S AD - Boston Coll, Dept Comp Sci, Chestnut Hill, MA 02467, USAUniv Calif Los Angeles, Dept Comp Sci, Los Angeles, CA 90024, USAMIT, Comp Sci Lab, Cambridge, MA 02139, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoBorowsky, E, Boston Coll, Dept Comp Sci, Chestnut Hill, MA 02467, USA TI - The BG distributed simulation algorithm AB - We present a shared memory algorithm that allows a set of f + 1 processes to wait-free "simulate" a larger system of n processes, that may also exhibit up to f stopping failures. Applying this simulation algorithm to the k-set-agreement problem enables conversion of an arbitrary k-fault-tolerant n-process solution for the k-set-agreement problem into a wait-free k + 1-process solution for the same problem. Since the k + 1-process k-set-agreement problem has been shown to have no wait-free solution [5,18,26], this transformation implies that there is no k-fault-tolerant solution to the n-process k-set-agreement problem, for any n. More generally, the algorithm satisfies the requirements of a fault-tolerant distributed simulation. The distributed simulation implements a notion of fault-tolerant reducibility between decision problems. This paper defines these notions and gives examples of their application to fundamental distributed computing problems. The algorithm is presented and verified in terms of I/O automata. The presentation has a great deal of interesting modularity, expressed by I/O automaton composition and both forward and backward simulation relations. Composition is used to include a safe agreement module as a subroutine. Forward and backward simulation relations are used to view the algorithm as implementing a multi-try snapshot strategy. The main algorithm works in snapshot shared memory systems; a simple modification of the algorithm that works in read/write shared memory systems is also presented MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0178-2770 UR - ISI:000170335900001 L2 - distributed computing;fault-tolerance;simulation;set-agreement;consensus;CONSENSUS SO - Distributed Computing 2001 ;14(3):127-146 2458 UI - 14892 AU - Boru G AU - van Ginkel M AU - Kronstad WE AU - Boersma L AD - CIMMYT, Mexico City 06600, DF, MexicoOregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USAvan Ginkel, M, CIMMYT, Lisboa 27,Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Expression and inheritance of tolerance to waterlogging stress in wheat AB - Approximately 10 million hectares of wheat (Triticum aestivum L.) globally experience medium to serious waterlogging. The inheritance of waterlogging tolerance was determined in reciprocal crosses of three tolerant (Prl/Sara, Ducula and Vee/Myna), and two sensitive (Seri-82 and Kite/Glen) spring bread wheat lines. Parents, F1, F2, F3, and backcross generations were studied under field conditions in Cd. Obregon, State of Sonora, Mexico. Flooding was applied when plants were at the three-leaf and first-internode stages. Basins were drained after 40 days of flooding. Leaf chlorosis was used as a measure of waterlogging tolerance. The sensitive by sensitive cross, Seri-82 x Kite/Glen, showed the highest mean values for percentage leaf chlorosis and area under chlorosis progress curve (AUCPC), and the lowest mean values for plant height, biomass, grain yield, and kernel weight. The F3 of the cross between the two tolerant parents Ducula and Vee/Myna had the lowest mean values for percentage leaf chlorosis and AUCPC, and the highest mean values for plant height, biomass, and grain yield. The expression of waterlogging tolerance was not influenced by a maternal effect. The F1 hybrids were intermediate for leaf chlorosis, indicating that tolerance was additive. Quantitative analysis also indicated that additive gene effects mainly controlled waterlogging tolerance in these crosses. Segregation ratios of F3 lines indicated that up to four genes controlled waterlogging tolerance in these crosses, with two genes adequate to provide significant tolerance. Early-generation selection for tolerance would be effective in these populations MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000165378600001 L2 - bread wheat;flooding;genes;leaf chlorosis;TRITICUM-AESTIVUM; WINTER-WHEAT; GROWTH; CULTIVARS; DAMAGE; YIELD; SHOOT; ROOT SO - Euphytica 2001 ;117(2):91-98 2459 UI - 13773 AU - Bosch-Bayard J AU - Valdes-Sosa P AU - Virues-Alba T AU - ubert-Vazquez E AU - John ER AU - Harmony T AU - Riera-Diaz J AU - Trujillo-Barreto N AD - NYU, Sch Med, Dept Psychiat, Brain Res Labs, New York, NY 10016, USACuban Natl Sci Res Ctr, Neurosci Lab, Havana, CubaNatl Autonomous Univ Mexico, Ctr Neurobiol, Mexico City 04510, DF, MexicoNathan S Kline Inst Psychiat Res, Orangeburg, NY 10962, USABosch-Bayard, J, NYU, Sch Med, Dept Psychiat, Brain Res Labs, 550 1st Ave, New York, NY 10016 USA TI - 3D statistical parametric mapping of EEG source spectra by means of Variable Resolution Electromagnetic Tomography (VARETA) AB - This article describes a new method for 3D QEEG tomography in the frequency domain. A variant of Statistical Parametric Mapping is presented for source log spectra. Sources are estimated by means of a Discrete Spline EEG inverse solution known as Variable Resolution Electromagnetic Tomography (VARETA). Anatomical constraints are incorporated by the use of the Montreal Neurological Institute (MNI) probabilistic brain atlas. Efficient methods are developed for frequency domain VARETA in order to estimate the source spectra for the set of 10(3)-10(5) voxels that comprise an EEG/MEG inverse solution. High resolution source Z spectra are then defined with respect to the age dependent mean and standard deviations of each voxel, which are summarized as regression equations calculated from the Cuban EEG normative database. The statistical issues involved are addressed by the use of extreme value statistics. Examples are shown that illustrate the potential clinical utility of the methods herein developed MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - WHEATON: EEG & CLINICAL NEUROSCIENCE SOC (E C N S) RP - NOT IN FILE U3 - TC 55 U4 - Engineering, Biomedical;Clinical Neurology U5 - J;Article AV - English IS - 0009-9155 UR - ISI:000168498400001 L2 - EEG spectrum;inverse solutions;QEEG norms;statistical parametric mapping;Z transform;VARETA;SCHOOL-AGE CHILDREN; DEVELOPMENTAL EQUATIONS; PROBABILISTIC ATLAS; ELECTRICAL-ACTIVITY; BRAIN; ELECTROENCEPHALOGRAM; ADOLESCENTS; TOPOGRAPHY; MEG SO - Clinical Electroencephalography 2001 ;32(2):47-61 2460 UI - 14356 AU - Bosch D AU - Foloppe N AU - Pastor N AU - Pardo L AU - Campillo M AD - Univ Autonoma Barcelona, Fac Med, Lab Med Computac, Unitat Bioestadist, E-08193 Barcelona, SpainKarolinska Inst, Ctr Struct Biochem, Dept Biosci, S-14157 Huddinge, SwedenUniv Autonoma Edo Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCampillo, M, Univ Autonoma Barcelona, Fac Med, Lab Med Computac, Unitat Bioestadist, E-08193 Barcelona, Spain TI - Calibrating nucleic acids torsional energetics in force-field: insights from model compounds AB - The development of force fields that accurately describe both the structure and the dynamics of nucleic acids in condensed phase is an ongoing effort, The development of the latest versions of the CHARMM and AMBER nucleic acids relied on ab initio as well as on experimental target data for the parametrization, Here we compare the two latest versions of the AMBER and CHARMM force field, in their ability to reproduce the ab initio torsional energy surfaces for selected nucleic acid dihedral angles. A series of model compounds is instrumental in this analysis. This illustrates how dissecting the energetics of the force field with model compounds allows to uncover deficiencies in the force-field, which ma?; or may not be apparent in the simulated properties of the full nucleic acids. The positions of minima, the relative energies and barrier heights are discussed. This type of analysis is proposed as one useful diagnostic criterion, in combination with others. to assess how well balanced are the various contributions to the energetics of a nucleic acid force field. (C) 2001 Elsevier Science B.V, All rights reserved MH - Mexico|Morelos MH - Spain MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000166838200031 L2 - CHARMM;AMBER;force field;DNA;RNA;molecular mechanics;MOLECULAR-DYNAMICS SIMULATIONS; BOX-BINDING PROTEIN; DNA-ECORI COMPLEX; B-DNA; A-DNA; CONFORMATIONAL PROPERTIES; MAGNETIC-RESONANCE; CRYSTAL-STRUCTURES; 2'-HYDROXYL GROUP; AQUEOUS-SOLUTION SO - Journal of Molecular Structure-Theochem 2001 ;537():283-305 2461 UI - 13539 AU - Bottcher A AU - Karlovich YI AU - Spitkovsky I AD - TU Chemnitz, Fak Math, D-09107 Chemnitz, GermanyInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoColl William & Mary, Dept Math, Williamsburg, VA 23187, USABottcher, A, TU Chemnitz, Fak Math, D-09107 Chemnitz, Germany TI - Toeplitz operators with semi-almost-periodic matrix symbols on Hardy spaces AB - We establish a Fredholm criterion and an index formula for Toeplitz operators with semi-almost-periodic matrix symbols on the Hardy spaces H-p (1 < p < infinity). Our main result completes the Fredholm theory of the aforementioned operators and generalizes previous results, which concerned the case p = 2 or were based on certain additional assumptions, such as factorizability, for the almost-periodic representatives of the symbol MH - Germany MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000169076800006 L2 - Toeplitz operator;Fredholm operator;index formula;almost periodic function;spectrum;essential spectrum SO - Acta Applicandae Mathematicae 2001 ;65(1-3):115-136 2462 UI - 14445 AU - Boumis P AU - Dickinson C AU - Meaburn J AU - Goudis CD AU - Christopoulou PE AU - Lopez JA AU - Bryce M AU - Redman MP AD - Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Crete, Dept Phys, GR-71003 Heraklion, Crete, GreeceFdn Res & Technol Hellas, GR-71110 Iraklion, Crete, GreeceUniv Patras, Dept Phys, Astron Lab, Rio Patras 26500, GreeceUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoBoumis, P, Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England TI - Deep H alpha imagery of the Eridanus shells AB - A deep H alpha image of interlocking filamentary arcs of nebulosity has been obtained with a wide-field (approximate to 30 degrees diameter) narrow-band filter camera combined with a charge-coupled device as a detector. The resultant mosaic of images, extending to a galactic latitude of -65 degrees, has been corrected for field distortions and had galactic coordinates superimposed on it to permit accurate correlations with the most recent H I (21 cm), X-ray (0.75 keV) and FIR (IRAS 100 mum) maps. Furthermore, an upper limit of 0.13 arcsec yr(-1) to the expansion proper motion of the primary 25 degrees long nebulous arc has been obtained by comparing a recent H alpha image obtained with the San Pedro Martir telescope of its filamentary edge with that on a Palomar Observatory Sky Survey E plate obtained in 1951. It is concluded that these filamentary arcs are the superimposed images of separate shells (driven by supernova explosions and/or stellar winds) rather than the edges of a single 'superbubble' stretching from Barnard's Arc (and the Orion Nebula) to these high galactic latitudes. The proper motion measurement argues against the primary H alpha -emitting arc being associated with the giant radio loop (Loop 2) except in extraordinary circumstances MH - United Kingdom MH - Greece MH - Mexico|Baja California PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000166574400011 L2 - ISM : bubbles;X-RAY ENHANCEMENT; ASSOCIATION; TAILS; HALO SO - Monthly Notices of the Royal Astronomical Society 2001 ;320(1):61-65 2463 UI - 13629 AU - Bourgin PL AU - Fabre VP AU - Huitron-Resendiz S AU - Calbet M AU - Sutcliffe JG AU - Henriksen SJ AU - Criado JR AU - Prospero-Garcia O AU - de Lecea L AD - Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92038, USAScripps Res Inst, Dept Neuropharmacol, La Jolla, CA 92037, USAUNAM, Sch Med, Dept Physiol, Mexico City, DF, Mexico TI - Cortistatin is a selective regulator of deep slow-wave sleep MH - Mexico|Distrito Federal MH - USA PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000168230900244 SO - Sleep 2001 ;24():A146-A146 2464 UI - 14102 AU - Bouyer DH AU - Stenos J AU - Crocquet-Valdes P AU - Moron CG AU - Popov VL AU - Zavala-Velazquez JE AU - Foil LD AU - Stothard DR AU - Azad AF AU - Walker DH AD - Univ Texas, Med Branch, Dept Pathol, WHO Collaborating Ctr Trop Dis, Galveston, TX 77555, USAGeelong Hosp, Australian Rickettsial Ref Lab, Douglas Hocking Med Inst, Geelong, Vic, AustraliaUniv Autonoma Yucatan, Dept Trop Pathol, Merida, Yucutan, MexicoLouisiana State Univ, Ctr Agr, Dept Entomol, Baton Rouge, LA 70803, USAIndiana Univ, Sch Med, Div Infect Dis, Indianapolis, IN 46202, USAUniv Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201, USAWalker, DH, Univ Texas, Med Branch, Dept Pathol, WHO Collaborating Ctr Trop Dis, 301 Univ Blvd, Galveston, TX 77555 USA TI - Rickettsia felis: molecular characterization of a new member of the spotted fever group AB - In this report, placement of Rickettsia felis in the spotted fever group (SFG) rather than the typhus group (TC) of Rickettsia is proposed. The organism, which was first observed in cat fleas (Ctenocephalides felis) by electron microscopy, has not yet been reported to have been cultivated reproducibly, thereby limiting the standard rickettsial typing by serological means. To overcome this challenge, several genes were selected as targets to be utilized for the classification of R. felis. DNA from cat fleas naturally infected with R. felis was amplified by PCR utilizing primer sets specific for the 190 kDa surface antigen (rOmpA) and 17 kDa antigen genes. The entire 5513 bp rompA gene was sequenced, characterized and found to have several unique features when compared to the rompA genes of other Rickettsia. Phylogenetic analysis of the partial sequence of the 17 kDa antigen gene indicated that R. felis is less divergent from the SFG rickettsiae than from the TG rickettsiae, The data corroborate results from previous reports that analysed the citrate synthase, 165 rRNA, rompB (135 kDa surface antigen), metK, ftsY, polA and dnaE genes that placed R. felis as a member of the SFC. The organism is passed trans-stadially and transovarially, and infection in the cat flea has been observed in the midgut, tracheal matrix, muscle, hypodermis, ovaries and testes MH - Australia MH - Mexico|Yucatan MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 40 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000167622500008 L2 - Rickettsia felis;rickettsial outer-membrane protein A;17 kDa gene;Ctenocephalides felis;tandem repeat domain;FRAGMENT-LENGTH-POLYMORPHISM; GENE REPEAT REGION; CAT FLEAS; PHYLOGENETIC ANALYSIS; SEQUENCE-ANALYSIS; MURINE TYPHUS; ANTIGEN GENE; PROTEIN ROMPA; IDENTIFICATION; INFECTION SO - International Journal of Systematic and Evolutionary Microbiology 2001 ;51():339-347 2465 UI - 13291 AU - Bowen DV AU - Huchtmeier W AU - Brinks E AU - Tripp TM AU - Jenkins EB AD - Princeton Univ Observ, Princeton, NJ 08544, USAMax Planck Inst Radioastron, D-53121 Bonn, GermanyDept Astron, Guanajuato 36000, MexicoBowen, DV, Princeton Univ Observ, Peyton Hall, Princeton, NJ 08544, USA TI - 21-cm HI emission from the Damped Lyman-alpha absorber SBS 1543+593 AB - We detect 21-cm emission from the Low Surface Brightness (LSB) galaxy SBS 1543+593, which gives rise to a Damped-Ly alpha (DLy alpha) absorption line in the spectrum of the background QSO HS 1543+5921 (z(e) = 0.807). We obtain an accurate measure of the velocity of the H I gas in the LSB galaxy, v = 2868 km s(-1), and derive a mass of M-HI = 1.3 x 10(9) M-circle dot. We compare M-HI with limits obtained towards two other z similar to 0.1 DLy alpha systems, and show that SBS 1543+593 would not have been detected. Hence LSB galaxies similar to SBS 1543+593 can be responsible for DLy alpha systems at even modest redshifts without being detectable from their 21-cm emission MH - Germany MH - Mexico|Guanajuato MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000169966600016 L2 - galaxies : individual : SBS 1543+593;radio lines : ISM;quasars : absorption lines;GALAXIES; ABSORPTION; REDSHIFTS; SYSTEMS; LINE SO - Astronomy & Astrophysics 2001 ;372(3):820-823 2466 UI - 12607 AU - Bowers CY AU - Schally AV AU - Hawley WD AU - Gual C AU - Parlow A AD - Tulane Univ, Sch Med, Dept Med, Endocrine Lab,Vet Adm Hosp, New Orleans, LA 70112, USATulane Univ, Sch Med, Dept Med, Polypeptide Lab,Vet Adm Hosp, New Orleans, LA 70112, USAInst Nacl Nutr, Mexico City, DF, MexicoUniv Calif Los Angeles, Sch Med, Dept Obstet & Gynecol, Los Angeles, CA 90024, USABowers, CY, Tulane Univ, Sch Med, Dept Med, Endocrine Lab,Vet Adm Hosp, New Orleans, LA 70112 USA TI - Effect of thyrotropin-releasing factor in man AB - This study reports the changes of plasma TSH levels which occurred when a highly purified preparation of porcine TRF was given Lo 3 cretins. These results in man indicate a certain lack of species specificity since TRF prepared from the hypothalami of pigs was active in the mouse and rat as well as man. The levels of TSH were measured by both bioassay and radioimmunoassay and were found to rise within 3 min in 2 of the patients and by 6 min in all 3 patients. The greatest rise was from 6 to 30 min and was followed by a gradual decline of the TSH level over the next 45 min. When the plasma level of TSH was measured in one of the patients 120 min after injecting TRF, it had returned to the base line level. Some conditions considered important for testing the activity of TRF in man are given. Because of the limited supply of TRF available, it was not possible to determine if the above were the optimal conditions for detecting the TRF response in man MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 1051-2144 UR - ISI:000171735900003 SO - Endocrinologist 2001 ;11(5):352-356 2467 UI - 13853 AU - Bowery BJ AU - Meza-Toledo S AU - Bowery NG AD - Univ Birmingham, Sch Med, Dept Pharmacol, Birmingham B15 2TT, W Midlands, EnglandEscuela Nacl Ciencias Biol, Mexico City 06400, DF, Mexico TI - Differential effect of GABA(B) receptor antagonists on electrically-evoked release of [H-3]-GABA in nigral and cerebrocortical slices of rat brain MH - United Kingdom MH - Mexico|Distrito Federal PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0007-1188 UR - ISI:000168054700178 SO - British Journal of Pharmacology 2001 ;133():U92-U92 2468 UI - 12764 AU - Bozhevolnyi SI AU - Coello V AD - Univ Aalborg, Inst Phys, DK-9220 Aalborg, DenmarkUniv San Nicolas de los Garza Nuevo, Ctr Invest Cientif & Estudios Super Ensenada BC, Leon, MexicoBozhevolnyi, SI, Univ Aalborg, Inst Phys, Pontoppidanstraede 103, DK-9220 Aalborg, Denmark TI - Statistics of local field intensity enhancements at nanostructured surfaces investigated with a near-field optical microscope AB - Near-field intensity distributions measured at nanostructured surfaces with a scanning near-field optical microscope are treated to determine the statistics of local field intensity enhancements. The probability density function (PDF) of the field intensity enhancement is calculated for surface-plasmon-polariton scattering by randomly rough surfaces of thin metal films and for light scattering in silver colloid fractals. We demonstrate that the statistics of the intensity distributions established in different scattering regimes, viz., single and multiple scattering, is distinctly different, and compare our results with the theoretical predictions available. We show that. in the regime of multiple scattering, the PDF decreases exponentially for large values of the intensity enhancement with the slope for surface-plasmon scattering being significantly different from that for light scattering in surface fractal structures. We also find that, in the latter case, the PDF slope is only weakly influenced by variations in the wavelength and polarization of incident radiation MH - Denmark MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000171136700101 L2 - FRACTAL METAL-SURFACES; PLASMON POLARITONS; RAMAN-SCATTERING; NUMERICAL-SIMULATION; LOCALIZATION; ROUGHNESS; CLUSTERS; EXCITATIONS SO - Physical Review B 2001 ;6411(11): 2469 UI - 13613 AU - Brailovsky H AU - Barrera E AU - Gollner U AU - Cassis G AD - Natl Autonomous Univ Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoHumboldt Univ, Museum Nat Kunde, Berlin, GermanyAustralian Museum, Sydney, NSW 2000, AustraliaBrailovsky, H, Natl Autonomous Univ Mexico, Dept Zool, Inst Biol, Apdo Postal 70153, Mexico City 04510, DF, Mexico TI - A new species of Dicranocephalus (Hemiptera : Stenocephalidae) from Australia AB - Dicranoccphalus aroonanus new species, is the first member of the family Stenocephalidae to be formally described from Australia. Its relationships are discussed. Dorsal habitus illustrations and drawings of the male genital capsule and parameres are provided MH - Australia MH - Germany MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000168933600004 L2 - hemiptera;Stenocephalidae;Dicranocephalus;Australia SO - Annals of the Entomological Society of America 2001 ;94(3):363-366 2470 UI - 12689 AU - Braine J AU - Duc PA AU - Lisenfeld U AU - Charmandaris V AU - Vallejo O AU - Leon S AU - Brinks E AD - Observ Bordeaux, UMR 5804, CNRS, INSU, F-33270 Florac, FranceCEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceCNRS, URA 2052, F-91191 Gif Sur Yvette, FranceInst Radio Astron Millimetr, Granada 18012, SpainCornell Univ, Dept Astron, Ithaca, NY 14853, USAAcad Sinica, ASIAA, Taipei 115, TaiwanUniv Guanajuato, Dept Astron, Guanajuato, MexicoBraine, J, Observ Bordeaux, UMR 5804, CNRS, INSU, BP 89, F-33270 Florac, France TI - Abundant molecular gas in tidal dwarf galaxies: On-going galaxy formation AB - We investigate the process of galaxy formation as can be observed in the only currently forming galaxies {the so-called Tidal Dwarf Galaxies, hereafter TDGs {through observations of the molecular gas detected via its CO (Carbon Monoxide) emission. These objects are formed of material torn off of the outer parts of a spiral disk due to tidal forces in a collision between two massive galaxies. Molecular gas is a key element in the galaxy formation process, providing the link between a cloud of gas and a bona fide galaxy. We have detected CO in 8 TDGs (two of them have already been published in Braine et al. 2000, hereafter Paper I), with an overall detection rate of 80%, showing that molecular gas is abundant in TDGs, up to a few 10(8) M-.. The CO emission coincides both spatially and kinematically with the HI emission, indicating that the molecular gas forms from the atomic hydrogen where the HI column density is high. A possible trend of more evolved TDGs having greater molecular gas masses is observed, in accord with the transformation of HI into H-2. Although TDGs share many of the properties of small irregulars, their CO luminosity is much greater (factor similar to 100) than that of standard dwarf galaxies of comparable luminosity. This is most likely a consequence of the higher metallicity (greater than or similar to1/3 solar) of TDGs which makes CO a good tracer of molecular gas. This allows us to study star formation in environments ordinarily inaccessible due to the extreme difficulty of measuring the molecular gas mass. The star formation efficiency, measured by the CO luminosity per H alpha flux, is the same in TDGs and full-sized spirals. CO is likely the best tracer of the dynamics of these objects because some fraction of the HI near the TDGs may be part of the tidal tail and not bound to the TDG. Although uncertainties are large for individual objects, as the geometry is unknown, our sample is now of eight detected objects and we find that the "dynamical" masses of TDGs, estimated from the CO line widths, seem not to be greater than the "visible" masses (HI + H-2 + a stellar component). Although higher spatial resolution CO (and HI) observations would help reduce the uncertainties, we find that TDGs require no dark matter, which would make them the only galaxy-sized systems where this is the case. Dark matter in spirals should then be in a halo and not a rotating disk. Most dwarf galaxies are dark matter-rich, implying that they are not of tidal origin. We provide strong evidence that TDGs are self-gravitating entities, implying that we are witnessing the ensemble of processes in galaxy formation: concentration of large amounts of gas in a bound object, condensation of the gas, which is atomic at this point, to form molecular gas and the subsequent star formation from the dense molecular component MH - France MH - Mexico|Guanajuato MH - Spain MH - Taiwan MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 56 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171486600013 L2 - stars : formation;galaxies : evolution;galaxies : formation;galaxies : interactions;galaxies : ISM;cosmology : dark matter;LARGE-SCALE STRUCTURE; COLD DARK-MATTER; H-II REGIONS; IRREGULAR GALAXIES; MAGELLANIC CLOUDS; NGC-2782 ARP-215; SPIRAL GALAXIES; ELLIPTICAL GALAXIES; GLOBAL PROPERTIES; STEPHANS-QUINTET SO - Astronomy & Astrophysics 2001 ;378(1):51-69 2471 UI - 12831 AU - Brainerd CJ AU - Wright R AU - Reyna VF AU - Mojardin AH AD - Univ Arizona, Dept Special Educ Rehabil, Tucson, AZ 85721, USAUniv Arizona, Sch Psychol, Tucson, AZ 85721, USAUniv Arizona, Dept Commun, Tucson, AZ 85721, USAUniv Arizona, Dept Surg, Tucson, AZ 85721, USAUniv Arizona, Dept Med, Tucson, AZ 85721, USAFree Univ Sinaloa, Dept Psychol, Sinaloa, MexicoBrainerd, CJ, Univ Arizona, Dept Special Educ Rehabil, Tucson, AZ 85721 USA TI - Conjoint recognition and phantom recollection AB - A new methodology for measuring illusory conscious experience of the "presentation" of unstudied material (phantom recollection) is evaluated that extracts measurements directly from recognition responses, rather than indirectly from introspective reports. Application of this methodology in the Deese-Roediger-McDermott (DRM) paradigm (Experiments 1 and 2) and in a more conventional paradigm (Experiment 3) showed that 2 processes (phantom recollection and familiarity) contribute to false recognition of semantically related distractors. Phantom recollection was the larger contributor to false recognition of critical distractors in the DRM paradigm, but surprisingly, it was also the larger contributor to false recognition of other types of distractors. Variability in false recognition was tied to variability in phantom recollection. Experimental control of phantom recollection was achieved with manipulations that were motivated by fuzzy-trace theory's hypothesis that the phenomenon is gist-based MH - Mexico|Sinaloa MH - USA PB - WASHINGTON: AMER PSYCHOLOGICAL ASSOC RP - NOT IN FILE U3 - TC 73 U4 - Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 0278-7393 UR - ISI:000171140000001 L2 - FALSE-RECOGNITION; PROCESS DISSOCIATION; MEMORY ILLUSIONS; RECALL; FAMILIARITY; ADULTS; TRUE; PERSISTENCE; PSYCHOLOGY; JUDGMENTS SO - Journal of Experimental Psychology-Learning Memory and Cognition 2001 ;27(2):307-327 2472 UI - 12603 AU - Brambila E AU - Tenorio N AU - Garcia-Luna E AU - Waalkes MP AD - NIEHS, Inorgan Carcinogenesis Sect, Comparat Carcinogenesis Lab, NCI, Durham, NC 27706, USAUniv Autonoma Puebla, Fac Ciencias Quim, Puebla 72570, MexicoBrambila, E, NIEHS, Inorgan Carcinogenesis Sect, Comparat Carcinogenesis Lab, NCI, 111 Alexander Dr,Bldg 101 SC MD-FO-09,Room F095, Durham, NC 27706 USA TI - Effect of abdominal surgery on the activity of acid and alkaline ribonucleases in rats AB - Ribonucleases (RNases) are a group of enzymes that hydrolyze different classes of RNA. It has been suggested that RNase activity in cells can act to indirectly regulate protein synthesis by controlling RNA degradation. However, little is known about the role of RNases under conditions characterized by a sudden increase of protein synthesis, such as with surgical trauma. The aim of this study was to investigate the effect of abdominal surgery on acid and alkaline RNase activities in rat liver. Acid and alkaline RNase activities decreased significantly at 3 h after surgery, reaching the lowest level at 16 h (63% less than control) for the acid and 6 h (39% less than control) for the alkaline activities. Acid RNase activity returned to its initial values 20 h after surgery, while alkaline RNase activity remained decreased even 24 h after surgery. In order to determine whether the observed decreases in RNase activity were produced by RNase inhibitors (RIs), the enzymatic activities of both RNases were measured after the addition of zinc, to dissociate possible RI/RNase complexes. Zinc addition increased acid RNase activity by 61%, but had no significant effect on alkaline RNase activity. Administration of cycloheximide (an inhibitor of protein synthesis) 2 h before surgery prevented the decrease of acid RNase activity 12 h after surgery, while there was no effect on the decrease in alkaline RNase activity. These results show that surgery produces a decrease in hepatic acid and alkaline RNase activities. The decreased acid RNase activity could be a consequence of the de novo synthesis of RNase inhibitors as a response to surgical trauma, while the mechanism involved in the decrease of alkaline RNase activity is unclear. Under pathophysiological conditions, which induce a high rate of protein synthesis, such as surgical wounding, decreased acid and alkaline RNase activity could provide an important mechanism for enhanced protein synthesis, by prolonging RNA half-life. (C) 2001 Academic Press MH - Mexico|Puebla MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Article AV - English IS - 0014-4800 UR - ISI:000171736400004 L2 - acid ribonuclease;alkaline ribonuclease;ribonuclease inhibitor;surgery;PURIFICATION; INHIBITOR; RNASE SO - Experimental and Molecular Pathology 2001 ;71(2):125-131 2473 UI - 12635 AU - Bramon A AU - Escribano R AU - Lucio JL AU - Napsuciale M AD - Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, SpainIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoBramon, A, Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain TI - Scalar sigma meson effects in rho and omega decays into pi(0)pi(0)gamma AB - The complementarity between chiral perturbation theory and the linear sigma model in the scalar channel is exploited to study pi (0)pi (0) production in rho and omega radiative decays, where the effects of a low mass scalar resonance sigma (500) should manifest. The recently reported data on rho --> pi (0)pi (0)gamma seem to require the contribution of a low mass and moderately narrow sigma (500). The omega --> pi (0)pi (0)gamma can properties of this controversial state could be fixed by improving the accuracy of these measurements. Data on omega --> pi (0)pi (0)gamma can also be accommodated in our framework, but are much less sensitive to the sigma (500) properties. (C) 2001 Published by Elsevier Science B.V MH - Italy MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171479800014 L2 - DOMINANCE SO - Physics Letters B 2001 ;517(3-4):345-354 2474 UI - 13644 AU - Brandan ME AU - Menchaca-Rocha A AU - Trache L AU - Clark HL AU - Azhari A AU - Gagliardi CA AU - Lui YW AU - Tribble RE AU - Varner RL AU - Beene JR AU - Satchler GR AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoTexas A&M Univ, Inst Cyclotron, College Stn, TX 77845, USAOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USABrandan, ME, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Refractive elastic scattering of O-16 by C-12 at 300 MeV AB - The O-16 + C-12 elastic cross section at 300 MeV has been measured over a wide angular range, displaying the shoulder of a nuclear rainbow. The optical model analysis was done using a microscopic potential as well as phenomenological real potentials. The results of this study confirm the potential characteristics found in previous studies at higher and lower energies. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000168799400002 L2 - O-16+C-12 elastic scattering at 300 MeV;airy structure;nuclear rainbow;COUPLED-CHANNELS CALCULATIONS; O-16+C-12 SCATTERING; NUCLEAR-MATTER; FOLDING MODEL; POTENTIALS; ENERGIES; MEV/NUCLEON; O-16+O-16 SO - Nuclear Physics A 2001 ;688(3-4):659-668 2475 UI - 14382 AU - Brandt JD AU - Mockovak ME AU - Chayet A AD - Univ Calif Davis, Dept Ophthalmol, Sacramento, CA 95817, USACodet Laser Inst, Tijuana, MexicoAris Laser Vis Ctr, Tijuana, MexicoBrandt, JD, Univ Calif Davis, Dept Ophthalmol, 4860 Y St,Suite 2400, Sacramento, CA 95817 USA TI - Pigmentary dispersion syndrome induced by a posterior chamber phakic refractive lens AB - PURPOSE: To report a case of bilateral pigmentary dispersion syndrome (PDS) induced by the implantation of posterior chamber phakic refractive lenses (PRLs). METHOD: Case report. RESULTS: Following bilateral implantation of posterior chamber phakic refractive lenses in 38-year-old woman, unilateral elevated intraocular pressure (IOP) developed within months that was attributable to pigment dispersion within the anterior chamber. Findings consistent with PDS included bilateral transillumination defects of the iris in areas contacting the anterior surface of the PRLs, pigment deposits on the anterior surface of the PRLs, Krukenberg spindles, and bilateral dense pigmentation of the trabecular meshwork, The patient's IOP is presently under control and she has not developed glaucomatous damage. CONCLUSIONS: The development of PDS in this case demonstrates that posterior chamber phakic refractive lenses can make contact with the posterior iris and induce pigment dispersion syndrome in susceptible patients. (Am J Ophthalmol 2001;131:260-263. (C) 2001 by Elsevier Science Inc. All rights reserved.) MH - USA MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 26 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000166870600019 L2 - INTRAOCULAR-LENS; MYOPIA; GLAUCOMA SO - American Journal of Ophthalmology 2001 ;131(2):260-263 2476 UI - 14455 AU - Brasil A AU - Colares AG AU - Palmas O AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoUniv Fed Ceara, Dept Matemat, BR-60455760 Fortaleza, Ceara, BrazilPalmas, O, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, Mexico TI - A gap theorem for complete constant scaler curvature hypersurfaces in the de Sitter space AB - To each immersed complete space-like hypersurface M with constant normalized scalar curvature R in the de Sitter space S-1(n+1), we associate sup H-2, where H is the mean curvature of M. It is proved that the condition sup H-2 less than or equal to C-n((R) over bar), where (R) over bar = (R - 1) > 0 and C-n((K) over bar) is a constant depending only on R and n, implies that either M is totally umbilical or M is a hyperbolic cylinder. It is also proved the sharpness of this result by showing the existence of a class of new rotation constant scalar curvature hypersurfaces in S-1(n+1) such that sup H-2 > C-n((R) over bar). (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0393-0440 UR - ISI:000166595800006 L2 - differential geometry;general relativity;MEAN-CURVATURE; FORMS SO - Journal of Geometry and Physics 2001 ;37(3):237-250 2477 UI - 12509 AU - Brauer M AU - vila-Casado C AU - Fortoul TI AU - Vedal S AU - Stevens B AU - Churg A AD - Univ British Columbia, Sch Occupat & Environm Hyg, Vancouver, BC V6T 1Z3, CanadaUniv British Columbia, Dept Med, Vancouver, BC V6T 1Z3, CanadaInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoUniv Auton Mexico, Fac Med, Dept Cellular & Tissue Biol, Mexico City, DF, MexicoUniv British Columbia, Dept Pathol, Vancouver, BC, CanadaBrauer, M, Univ British Columbia, Sch Occupat & Environm Hyg, 2206 E Mall, Vancouver, BC V6T 1Z3, Canada TI - Air pollution and retained particles in the lung AB - Epidemiologic evidence associates particulate air pollution with cardiopulmonary morbidity and mortality. The biological mechanisms underlying these associations and the relationship between ambient levels and retained particles in the lung remain uncertain. We examined the parenchymal particle content of 11 autopsy lungs from never-smoking female residents of Mexico City, a region with high ambient particle levels [3-year mean PM10 (particulate matter less than or equal to 10 mum in aerodynamic diameter)= 66 mug/m(3)], and 11 control residents of Vancouver, British Columbia, Canada, a region with relatively low levels (3-year mean PM10 = 14 mug/m(3)). Autopsy lungs were dissolved in bleach and particles were identified and counted by analytical electron microscopy. Total particle concentrations in the Mexico City lungs were significantly higher [geometric mean = 2,055 (geometric SD = 3.9) x 10(6) particles/g dry lung vs. 279 (1.8) x 10(6) particles/g dry lung] than in lungs from Vancouver residents. Lungs from Mexico City contained numerous chain-aggregated masses of ultrafine carbonaceous spheres, some of which contained Sulfur, and aggregates of ultrafine aluminum silicate. These aggregates made up an average of 25% of the total particles by count in the lungs from Mexico City, but were only rarely seen in lungs from Vancouver. These observations indicate for the first time that residence in a region with high levels of ambient particles results in pulmonary retention of large quantities of fine and ultrafine particle aggregates, some of which appear to be combustion products MH - Canada MH - Mexico|Distrito Federal PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 26 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000171864800025 L2 - air pollution;environmental exposure;particles;pulmonary retention;MORTALITY; ULTRAFINE; HEALTH SO - Environmental Health Perspectives 2001 ;109(10):1039-1043 2478 UI - 12346 AU - Bravo-Alfaro H AU - Cayatte V AU - Van Gorkom JH AU - Balkowski C AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoObserv Paris, DAEC, F-92195 Meudon, FranceCNRS, UMR 8631, F-92195 Meudon, FranceUniv Paris 07, F-92195 Meudon, FranceColumbia Univ, Dept Astron, New York, NY 10027, USABravo-Alfaro, H, Univ Guanajuato, Dept Astron, Apdo Postal 144, Guanajuato 36000, Mexico TI - VLA HI Imaging of the brightest spiral galaxies in Coma - II. The HI Atlas and deep continuum imaging of selected early type galaxies AB - In the first paper of this series we used HI observations of the 19 brightest spirals in Coma to analyze the dynamical state of the cluster. In this paper we present the detailed Hi distribution and kinematics of the spirals that were detected in Hi, and radio continuum data for a sample of star forming and post starburst galaxies in Coma. We discuss the importance of ICM-ISM interactions to explain the observed Hi morphology. A rough comparison of observed Hi sizes with predicted Hi sizes from simulations by Abadi et al. (1999) gives reasonable agreement. We use the results on radio continuum emission to estimate the star formation rate in the PSB galaxies we pointed at. The radio continuum emission in the 11 so called post starburst galaxies, identified by Caldwell et al. (1993) in the cluster, is weak. Eight of the 11 were not detected down to a 3 sigma upper limit of 0.6 mJy. This sets an upper limit to the star formation rate in these galaxies of less than 0.2 M-. yr(-1). The three detected post starburst galaxies have a star formation rate of less than one solar mass per year. Thus none of the post starburst galaxies in Coma are dust enshrouded starbursts MH - France MH - Mexico|Guanajuato MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000172243500002 L2 - galaxies : clusters : individual : Coma;radio lines : galaxies;VIRGO CLUSTER GALAXIES; NEUTRAL HYDROGEN; NEARBY CLUSTERS; STAR-FORMATION; DISK GALAXIES; GAS; SUPERCLUSTER; EVOLUTION; RADIO; CLASSIFICATION SO - Astronomy & Astrophysics 2001 ;379(2):347-361 2479 UI - 14091 AU - Bravo-Castillero J AU - Guinovart-Diaz R AU - Sabina FJ AU - Rodriguez-Ramos R AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, Habana 4, CubaNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726,Delegac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Closed-form expressions for the effective coefficients of a fiber-reinforced composite with transversely isotropic constituents - II. Piezoelectric and square symmetry AB - A composite material with unidirectional cylindrical fibers periodically distributed is considered here, where each periodic cell is a binary homogeneous piezoelectric medium with square symmetry in welded contact at the interface. This paper makes use of some results obtained for a similar elastic composite in Rodriguez-Ramos et al. [Mech. Mater. 33 (2001) 223-235]. Relatively simple closed-form expressions for the overall properties are obtained by the asymptotic homogenization method. The local problems that arise are solved by means of potentials methods of a complex variable and Weierstrass elliptic and related functions. Benveniste and Dvorak universal type of relations for some of the overall properties are derived in a simple new way without solving any local problem, The number of local problems to get all coefficients is 3. The numerical computation of the effective properties is simple, Averaged properties of these piezo-composites relevant to hydrostatic and medical imaging transducer applications are computed and compared with existing experimental results. The comparison shows quite a good agreement with experimental data. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Multidisciplinary;Mechanics U5 - J;Article AV - English IS - 0167-6636 UR - ISI:000167592700004 L2 - fiber-reinforced composite;universal relations;asymptotic homogenization method;effective moduli;periodic structures;piezoelectric material;UNIVERSAL RELATIONS; MODULI; BOUNDS SO - Mechanics of Materials 2001 ;33(4):237-248 2480 UI - 13040 AU - Bravo-Moreno JF AU - az-Sanchez V AU - Montoya-Flores JG AU - Lamoyi E AU - Saez JC AU - Perez-Armendariz EM AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular, Mexico City 04510, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoPontificia Univ Catolica Chile, Dept Ciencias Fisiol, Santiago, ChilePerez-Armendariz, EM, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular, Circuito Interior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Expression of connexin43 in mouse Leydig, Sertoli, and germinal cells at different stages of postnatal development AB - Connexin 43 (Cx43) is the most abundant and ubiquitously distributed gap junction protein in testicular cells. Lack of Cx43 expression results in male infertility. We investigated whether Cx43 is expressed and regulated in Leydig, Sertoli and germinal cells at different stages of postnatal development. Cx43 was detected using three different antibodies shown by immunoblotting to be highly specific. At different postnatal ages Cx43 localization was compared in serial or double labeled testicular cryosections with immunocytochemical distribution of steroidogenic enzyme, 3 beta hidroxysteroid-dehydrogenase (3 beta HSD), Mullerian inhibitory hormone (MIH), and germinal nuclear cell antigen (GNCA1), which are specific markers of interstitial Leydig, Sertoli and germinal cells, respectively. In the interstitium, round cell clumps (RCC) with lipid droplets positive for 3 beta HSD and Cx:43 were frequently found at intertubular areas at birth and Cx:43 was mainly localized at cell membrane appositions. From day 3, the number and size of 3 beta HSD-positive RCC started to decrease, and reached a minimum at 7-14 dpp; Cx43 expressed by them is progressively downregulated. From day 21 an increase in the size and number of RCC positive for Cx43 and 3 beta HSD was found that continued at 24, 26 and 28 days and reached a maximum at 35 and 60 dpp. Biphasic expression of interstitial Cx43 and 3 beta HSD was also found to be positively and temporally correlated with fluctuations in intratesticular testosterone content at all ages studied. In the seminiferous cord (SQ, Cx43 was expressed at birth between adjacent Sertoli cells DMI positive) localized at the periphery, as well as in their cytoplasm projections that surround centrally localized gonocytes. From days 3 to 7, Cx43 labeling increased in Sertoli cells mainly at their apical border. At day 14, Cx43 distribution in Sertoli cells changed from apical to basal in parallel to migration of germinal (GNCA1-positive) cells from the periphery to the center of the SC. At all these ages, Cx43 was also localized at cell borders between Sertoli and germinal cells. In conclusion, this study demonstrates that Cx43 in Leydig cells is regulated during postnatal development in an age and functional dependent manner. In the tubule, it is demonstrated that Cx43 is modulated in Sertoli cells during the neonatal and prepubertal period. We also provide evidence for the first time that Cx43-gap junctions communicate between Sertoli and germinal cells before and during the first wave of spermatogenesis. Anat Rec 264:13-24, 2001. (C) 2001 Wiley-Liss, Inc MH - Chile MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 19 U4 - Anatomy & Morphology U5 - J;Article AV - English IS - 0003-276X UR - ISI:000170603900002 L2 - development;Cx43;Leydig;Sertoli;germinal;differentiation;proliferation;secretion;GAP JUNCTION CHANNELS; MICE LACKING CONNEXIN43; SEMINIFEROUS EPITHELIUM; GENE-EXPRESSION; RAT; TESTIS; COMMUNICATION; TESTOSTERONE; PROTEIN; CONDUCTANCE SO - Anatomical Record 2001 ;264(1):13-24 2481 UI - 13880 AU - Bregni RC AU - Taylor AM AU - Garcia AM AD - Inst Nacl Cancerol, Div Patol, Mexico City, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Dept Atenc Salud, Mexico City, DF, MexicoUniv Francisco Marroquin, Fac Med, Guatemala City, GuatemalaTaylor, AM, Bruselas 109-b,Col del Carmen Coyoacan, Mexico City 04100, DF, Mexico TI - Ameloblastic fibrosarcoma of the mandible: report of two cases and review of the literature AB - Ameloblastic fibrosarcoma (AFS) is a rare malignant odontogenic tumour. To date, 60 well-documented cases have been published in the English-language literature. Two additional cases located in the posterior region of the mandible are reported. The relevant clinicopathological features of these cases, as well as those previously reported are discussed. Approximately two-thirds of AFS are malignant tumors de novo, with an average age of the affected patients being 22.9 years. This age is lower than the one observed in AFS developing from a pre-existent benign lesion (mean 33 years). Although regional and distant metastases are very infrequent, AFS is a locally aggressive lesion, with 23 (37%) of the reported cases having at least one recurrence; 12 patients (19.3%) died of the disease. Wide surgical excision with long-term follow-up remains the treatment of choice for this neoplasm MH - Guatemala MH - Mexico|Distrito Federal PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 3 U4 - Dentistry, Oral Surgery & Medicine;Pathology U5 - J;Article AV - English IS - 0904-2512 UR - ISI:000168090400010 L2 - ameloblastic fibrosarcoma;jaws;odontogenic tumour;sarcoma;ODONTOGENIC-TUMORS; MALIGNANT TRANSFORMATION; MAXILLA; FIBROMA; JAWS SO - Journal of Oral Pathology & Medicine 2001 ;30(5):316-320 2482 UI - 13927 AU - Brevik I AU - Milton KA AU - Nojiri S AU - Odintsov SD AD - Norwegian Univ Sci & Technol, Div Appl Mech, N-7491 Trondheim, NorwayUniv Oklahoma, Dept Phys & Astron, Norman, OK 73019, USANatl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoBrevik, I, Norwegian Univ Sci & Technol, Div Appl Mech, N-7491 Trondheim, Norway TI - Quantum (in)stability of a brane-world AdS(5) universe at nonzero temperature AB - We consider the quantum effects of bulk matter (scalars, spinors) in the Randall-Sundrum AdS(5) brane-world at nonzero temperature. The thermodynamic energy (modulus potential) is evaluated at low and high temperatures. This potential has an extremum which could be a minimum in some cases (for example, for a single fermion). That suggests a new dynamical mechanism to stabilize the thermal AdS5 brane-world. It is shown that the brane separation required to solve the hierarchy scale problem may occur at a quite low temperature. A natural generalization in terms of the AdS/CFT correspondence (through the supergravity thermal contribution) is also possible. (C) 2001 Published by Elsevier Science B.V MH - Japan MH - Mexico|Guanajuato MH - Norway MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 52 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000167987400014 SO - Nuclear Physics B 2001 ;599(1-2):305-318 2483 UI - 12416 AU - Brinks E AU - Duc PA AU - Springel V AU - Pichardo B AU - Weilbacher P AU - Mirabel F AD - Univ Guanajuato, Dept Astron, Guanajuato, MexicoCNRS, F-75700 Paris, FranceCEA Saclay, Serv Astrophys, Gif Sur Yvette, FranceCtr Astrophys, Cambridge, MA 02138, USAUNAM, Inst Astron, Mexico City, DF, MexicoUniv Sternwarte, D-3400 Gottingen, GermanyIAFE, Buenos Aires, DF, ArgentinaBrinks, E, Univ Guanajuato, Dept Astron, Apdo Postal 144, Guanajuato, Mexico TI - The formation of tidal dwarf galaxies in interacting systems: The case of Arp 245 (NGC 2992/93) AB - We present some highlights of our multi-wavelength study, which involves optical broad- and narrow-band imaging, long-slit spectroscopy, high-resolution HI and CO observations, of the interacting system Arp 245. This object consists of the galaxies NGC 2992 and NGC 2993. Based on a numerical model of the collision, which was computed with a Tree-SPH code, we derive that Arp 245 is observed at an early stage of the interaction, about 100 Myr after perigalacticon, though at a time when tidal tails have already developed. At the tip of the NGC 2992 tail we find a gas reservoir of about 10(9) M-., or about 60% of the HI which is seen towards NGC 2992, which coincides with what appears to be a star-forming tidal dwarf galaxy, A245N. The TDG A245N exhibits properties ranging between those of dwarf irregular galaxies (structural parameters, gas content, star formation rate) and those of spiral disks (metallicity, star formation efficiency, stellar population). We speculate what the required conditions are to form a TDG, and how they can be distinguished from field dwarf irregulars MH - Argentina MH - France MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900097 L2 - galaxies : interactions;galaxies : individual (NGC 2992, NGC 2993, FGC 0938);radio emission lines : HI;DEBRIS; GAS SO - Astrophysics and Space Science 2001 ;277():405-408 2484 UI - 12401 AU - Bronnikov KA AU - Melnikov VN AD - VNIIMS, Ctr Gravitat & Fundam Metrol, Moscow 117313, RussiaPFUR, Inst Gravitat & Cosmol, Moscow 117198, RussiaInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoBronnikov, KA, VNIIMS, Ctr Gravitat & Fundam Metrol, 3-1 Ulyanovoy St, Moscow 117313, Russia TI - On observational predictions from multidimensional gravity AB - We discuss possible observational manifestations of static, spherically symmetric solutions of a class of multidimensional theories of gravity, which includes the low energy limits of supergravities and superstring theories as special cases. We discuss the choice of a physical conformal frame to be used for the description of observations. General expressions are given for (i) the Eddington parameters beta and gamma, characterizing the post-Newtonian gravitational field of a central body, (ii) p-brane black hole temperatures in different conformal frames and (iii) the Coulomb law modified by extra dimensions. It is concluded, in particular, that beta and gamma depend on the integration constants and can be therefore different for different central bodies. If, however, the Einstein frame is adopted for describing observations, we always obtain gamma = 1. The modified Coulomb law is shown to be independent of the choice of a 4-dimensional conformal frame. We also argue the possible existence of specific multidimensional objects, T-holes, potentially observable as bodies with mirror surfaces MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000172129600008 L2 - multidimensional gravity;alternative theories;observables;DILATONIC BLACK-HOLES; P-BRANES; EXTRA DIMENSIONS; SIGMA-MODEL; STABILITY; STRINGS; COSMOLOGY; SYSTEMS; FIELD; TIME SO - General Relativity and Gravitation 2001 ;33(9):1549-1578 2485 UI - 14450 AU - Brostow W AU - Castano VM AU - Das-Gupta D AU - Hess M AD - Univ N Texas, Dept Mat Sci, Denton, TX 76203, USAUniv N Texas, Dept Phys, Denton, TX 76203, USANatl Autonomous Univ Mexico, Dept Appl Phys & Adv Technol, FATA, Queretaro 67000, MexicoUniv Wales, Sch Elect Engn & Comp Syst, Bangor LL57 1UT, Gwynedd, WalesUniv Duisburg Gesamthsch, FB Phys Chem 6, D-47048 Duisburg, GermanyBrostow, W, Univ N Texas, Dept Mat Sci, Denton, TX 76203, USA TI - POLYCHAR-8 worldwide forum on polymer applications and theory in 2000 AB - Profile of POLYCHAR conferences is defined. An introduction to the following papers presented at the POLYCHAR-8 conference in January 2000 is provided. Prizes awarded at the POLYCHAR-8 Conference are listed MH - Germany MH - Mexico|Queretaro MH - USA MH - United Kingdom PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Editorial Material AV - English IS - 1432-8917 UR - ISI:000166482100001 L2 - polymer research;polymer applications;polymer theory;polymer computer simulations SO - Materials Research Innovations 2001 ;4(2-3):65-67 2486 UI - 14094 AU - Brown F AU - Kimizuka N AD - Univ Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoNatl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, JapanKimizuka, N, Univ Sonora, Dept Invest Polimeros & Mat, Rosales & Luis Encinas S-N, Hermosillo 83000, Sonora, Mexico TI - Orthorhombic In(Fe1-xTix)O3+x/2 (0.50 <= x <= 0.69) and monoclinic In(Fe1-xTix)O3+x/2 (0.73 <= x <= 0.75) in the system InFeO3-In2Ti2O7 at 1300 degrees C in air II. Synthesis and crystal structures AB - Two solid solutions, In(Fe1-xTix)O3+x/2 (orthorhombic phase, Cmcm, 0.50 less than or equal to x less than or equal to 0.69) and In(Fe1-xTix)O3+x/2 (monoclinic phase, C2/m, 0.73 less than or equal to x less than or equal to 0.75) in the pseudobinary system InFeO3-In2Ti2O7 were synthesized at 1300 degreesC in air. Their crystal structures which were determined by powder X-ray diffractometry were closely related to those of the delafossite, (hex.) InFeO3 and the pyrochlore. The crystal structural relationships between InFeO3, In(Fe1-xTix)O3+x/2, and the pyrochlore were discussed in terms of the stacking of the two-dimensional closest packed oxygen layers. The isostructural solid solutions, In(Al1-xTix)O3+x/2, In(Cr1-xTix)O3+x/2, In(Ga1-xTix)O3+x/2, In(Fe1/3Ti1/2Mg1/6)O-19/6, and In(Ga0.30Ti0.45Mg0.25)O-3.10 were also synthesized and their lattice constants were determined. (C) 2001 Academic Press MH - Japan MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000167634500003 L2 - In(Fe1-xTix)O3+x/2;pyrochlore;InFeO3;delafossite;two-dimensional oxygen closest packing;polytype;PHASE-RELATIONS; 1350-DEGREES-C; 1100-DEGREES-C; GA SO - Journal of Solid State Chemistry 2001 ;157(1):13-22 2487 UI - 14666 AU - Bruhn T AU - Schaller C AU - Schulze C AU - Sanchez-Rodriguez J AU - Dannmeier C AU - Ravens U AU - Heubach JF AU - Eckhardt K AU - Schmidtmayer J AU - Schmidt H AU - Aneiros A AU - Wachter E AU - Beress L AD - Univ Kiel, Fac Med, Inst Toxicol, D-24105 Kiel, GermanyUniv Hamburg, Hosp Eppendorf, Ctr Mol Neurobiol, D-20246 Hamburg, GermanyUNAM, Inst Ciencias Mar & Limnol, Cancun, Q Roo, MexicoDresden Univ Technol, Med Fac Carl Gustav Carus, Dept Pharmacol & Toxicol, D-8027 Dresden, GermanyUniv Kiel, Inst Physiol, D-24118 Kiel, GermanyMarine Bioact Dept & Nat Prod, Havana, CubaUniv Munich, Inst Physiol Chem, D-80336 Munich, GermanyBeress, L, Univ Kiel, Fac Med, Inst Toxicol, Brunswikerstr 10, D-24105 Kiel, Germany TI - Isolation and characterisation of five neurotoxic and cardiotoxic polypeptides from the sea anemone Anthopleura elegantissima AB - Five toxins (APE 1 to APE 5) of the sea anemone species Anthopleura elegantissima (Brandt) have been isolated from a toxic by-product fraction of its concentrated crude watery-methanolic extract, prepared previously for the isolation of a neuropeptide (the head-activator) by Schaller and Bodenmuller (Proc. Natl. Acad. Sci. USA 78 (1981) 7000) from 200 kg sea anemones. Toxin purification was performed by desalting of the starting material by dialysis (MWCO 3500) against distilled water, anion exchange chromatography on QAE-Sephadex A25 at pH 8, twice gel filtration on Sephadex G50 m, repeated chromatography on QAE-Sephadex at pH 10 and chromatography on the cation exchanger Fractogel(R) EMD SO3--650 M. Final purification of the toxins was achieved by HPLC on MN SP 250/10 Nucleosil(R) 500-5 C-18 PPN and MN SP 250/21 Nucleosil(R) 300-7 C-18. Each toxin was composed of at least two isotoxins of which APE 1-1, APE 1-2, APE 2-1, APE 2-2 and APE 5-3 were isolated in preparative scale. With exception of APE 5-3 the sequences of the isotoxins have been elucidated. They resemble the 47 residue type-I long polypeptide toxins native to Anemonia sulcata (Pennant). All isotoxins paralyse the shore crab (Carcinus maenas) by tetanic contractions after i.m. application. The toxins modify current passing through the fast Na+ channel in neuroblastoma cells, leading to delayed and incomplete inactivation. APE 1-1, APE 2-1 and APE 5-3 produce a positive inotropic effect in mammalian heart muscle, although they differ in potency. The order of potency is APE 2-1 > APE 1-1 > APE 5-3 (i.e, threshold concentrations are 1, 10 and 300 nM, respectively). In addition, they enhance the spontaneous beating frequency in isolated right atria (guinea pig). The most potent cardiotoxic isotoxin is APE 2-1, its sequence is identical with that of AP-C, a toxin isolated and characterised previously by Norton ct al. (Drugs and Feuds from the Sea, 1978, University of Oklahoma Press, p. 37-50). LD50 APE 2-1: 1 mug/kg b,.w. C. maenas (i.m.) LD50 APE 1-1: 10 mug/kg b.w. C. maenas (i.m.) LD50 APE 5-3: 50 mug/kg, b.w. C. maenas (i.m.) (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Germany MH - Mexico|Quintana Roo PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000165916300012 L2 - Anthopleura elegantissima;Carcinus maenas;polypeptide toxins;neurotoxicity;cardiotoxicity;SODIUM-CHANNEL TOXINS; CATIONIC RESIDUES; SCORPION TOXIN; SULCATA TOXIN; HIGH-AFFINITY; SWISS-MODEL; INACTIVATION; CONDUCTANCE; BINDING SO - Toxicon 2001 ;39(5):693-702 2488 UI - 12288 AU - Brunet AK AU - Medellin RA AD - Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108, USAUniv Minnesota, James Ford Bell Museum Nat Hist, St Paul, MN 55108, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoBrunet, AK, Univ Minnesota, Dept Ecol Evolut & Behav, 1987 Upper Buford Circle, St Paul, MN 55108 USA TI - The species-area relationship in bat assemblages of tropical caves AB - We tested for a relationship between number of bat species and surface area of 20 caves in central Mexico and investigated the role of the habitat diversity model as an explanation for this relationship. There was a significant positive correlation between the logarithm of species richness and the logarithm of cave surface area, evidence of a species-area relationship. Our data suggest that roost site diversity, as indicated by spatial variation in relative humidity and presence of avons (conical depressions in cave ceilings) is a cause of the species-area relationship MH - Mexico|Distrito Federal MH - USA PB - PROVO: AMER SOC MAMMALOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000172387500022 L2 - bat assemblages;caves;habitat diversity model;Mexico;species-area relationship;HABITAT DIVERSITY; RICHNESS; BIOLOGY; CONSERVATION; POPULATION; ISLANDS; MEXICO SO - Journal of Mammalogy 2001 ;82(4):1114-1122 2489 UI - 12884 AU - Bueno-Baques D AU - Medina-Boudri A AU - Matutes-Aquino J AD - Ctr Invest Mat Avanzados, Chihuahua, MexicoUniv La Habana, Fac Fis IMRE, Lab Magnetismo, Havana, CubaMatutes-Aquino, J, Miguel de Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Mexico TI - Remanence properties of Co-precipitated cobalt ferrite AB - Isothermal remanent magnetization (IRM) and DC demagnetization (DCD) curves of a co-precipitated cobalt ferrite sample were obtained. From the IRM and DCD data, the Henkel plot was obtained and analyzed in the Preisach model framework. The Henkel plot data are below the Wohlfarth line that indicates a dominant local disorder (demagnetizing-like effect). Forward and reverse switching field distribution curves were obtained from differentiation of the IRM and DCD curves. The peak values of these switching field distributions differ by a factor of about 2.7. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000170628400125 L2 - cobalt ferrite;remanence;Henkel plot;IRM;DCD SO - Journal of Magnetism and Magnetic Materials 2001 ;226():1412-1414 2490 UI - 12862 AU - Bulleova S AU - Rothenberg SJ AU - Manalo MA AD - Charles R Drew Univ Med & Sci, Dept Anesthesiol, Environm Res Ctr, Los Angeles, CA 90059, USAKing Drew Med Ctr, Los Angeles, CA, USANatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoRothenberg, SJ, Charles R Drew Univ Med & Sci, Dept Anesthesiol, Environm Res Ctr, 1621 E 120th St,MP 10, Los Angeles, CA 90059 USA TI - Lead levels in blood bank blood AB - Although blood bank blood is usually screened for dangerous pathogens, the presence of toxic metals in blood has received little attention. Population blood lead levels have been declining in the United States, but occasional high outliers in blood lead concentration can be found-even when mean levels of blood lead are low. We sampled 999 consecutive blood bank bags from the King/Drew Medical Center, used between December 1999 and February 2000. The geometric mean blood lead level was 1.0 mug/dl (0.048 mu mol/l), but 0.5% of the samples had lead levels that exceeded 10 mug/dl, and 2 samples had lead levels that exceeded 30 mug/dl. The 2 samples with the highest lead levels could have presented an additional risk to infants if they were used for blood replacement. Therefore, even in countries with generally low population blood lead levels, blood bank blood should be screened for lead concentration prior to use with infants MH - USA MH - Mexico|Morelos PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000171064500005 L2 - blood bank;lead;Pb SO - Archives of Environmental Health 2001 ;56(4):312-313 2491 UI - 12754 AU - Burgos-Hernandez A AU - Lopez-Garcia R AU - Njapau H AU - Park DL AD - Louisiana State Univ, Ctr Agr, Dept Food Sci, Baton Rouge, LA 70803, USABurgos-Hernandez, A, Univ Sonora, Dept Invest & Postgrad Alimentos, Apartado Postal 1658, Hemosillo 83000, Sonora, Mexico TI - Partial chemical/structural elucidation of anti-mutagenic compounds from corn AB - In this study, corn fractions obtained from an isolation process of anti-mutagenic factors in our previous research work (Burgos-Hernandez et al., 2001), were subjected to several analyses for chemical/structural elucidation. The anti-mutagenic activity of these fractions was tested against aflatoxin B-1 (AFB(1)) and 1-methyl-3-nitro-1-nitrosoguanidine (MNNG), a mutagen that does not require bioactivation. Two concentrations of this agent in the com fractions were tested for anti-mutagenicity in the Salmonella/microsomal mutagenicity assay, using tester strain TA100 with no metabolic activation. Corn fractions tested showed evidence of anti-mutagenic activity by producing a dose-response type of relationship between a constant amount of MN-NG and several concentrations of tested corn fraction. Five different varieties of yellow corn were tested in order to determine if the anti-mutagenic factors were intrinsic to corn. Variety of the corn did not show an effect on the reduction of the mutagenic potential of AFB(1) suggesting that anti-mutagenic compounds are intrinsic to corn. Four corn fractions, previously obtained after the isolation process were analyzed by MALDI-MS and GC-MS. MALDI-MS showed the presence of two groups of molecules or molecular fragments. The molecular mass of one group ranged from 250 to 370 m/z, the other ranged from 540 to 640 m/z. GC-MS identified linoleic acid as one of the compounds responsible for the anti-mutagenic activity present in corn. (C) 2001 Published by Elsevier Science Ireland Ltd MH - Mexico|Sonora MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0300-483X UR - ISI:000171240200005 L2 - anti-mutagenic compounds;corn;characterization;Salmonella TA 100 and TA 98;spectrometry;linoleic acid;AFLATOXIN REACTION-PRODUCTS; LINOLEIC-ACID; FATTY-ACIDS; MODULATION; ACTIVATION; OIL SO - Toxicology 2001 ;166(3):161-170 2492 UI - 13027 AU - Burgos-Hernandez A AU - Lopez-Garcia R AU - Njapau H AU - Park DL AD - Louisiana State Univ, Ctr Agr, Dept Food Sci, Baton Rouge, LA 70803, USABurgos-Hernandez, A, Univ Sonora, Dept Invest & Posgrado Alimentos, Apartado Postal 1658, Mexico City 83000, DF, Mexico TI - Anti-mutagenic compounds from corn AB - In previous studies with aflatoxin-contaminated corn an uncharacteristic response for AFB(1) in the Salmonella/microsomal mutagenicity assay (Ames test) was observed and the presence of anti-aflatoxin factors in the corn was suggested. In the current study, corn was extracted and fractionated using thin layer chromatography (TLC) using different developing solvent systems and the Ames test was used to monitor for anti-mutagenic activity in the corn fractions. Both Salmonella tester strains TA98 and TA100 with metabolic activation (S9) were used. Several corn fractions, at different stages in the isolation and purification process, showed anti-mutagenic dose-responses when exposed to pure AFB(1). Corn extracts were non-toxic to the tester strains and TLC fractions that showed the best anti-mutagenic dose-responses were selected for further partial characterization analyses MH - Mexico|Distrito Federal MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Food Science & Technology;Toxicology U5 - J;Article AV - English IS - 0265-203X UR - ISI:000170526100005 L2 - aflatoxins;anti-mutagenic compounds;Salmonella TA100 and TA98;corn;isolation;thin layer chromatography;AFLATOXIN REACTION-PRODUCTS; CLEANUP SO - Food Additives and Contaminants 2001 ;18(9):797-809 2493 UI - 13712 AU - Burgueno-Tapia E AU - Bucio MA AU - Rivera A AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Colombia, Dept Quim, Bogota, DC, ColombiaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - Cacalolides from Senecio madagascariensis AB - 14-Isovaleryloxy-O-methyl- 1,2-dehydrocacalol( 1) and cycloart-23-ene-3,25-diol, beta -sitosterol, and stigmasterbl, along with five new cacalolides, 1-hydroxy-2-methoxy-1,2,3,4-dehydro-6-de (2), 1-hydroxy-2-methoxy-1,2,3,4-dehydrocacal (3), 1,2-dimethoxy-1,2,3,4-dehydro-6-dehydrox (4), 1,2-dimethoxy-1,2,3,4-dehydrocacalone (5), and 2-methoxy-O-methyl-l-oxo-2,3-dehydrocaca (6), were isolated from Senecio madagascariensis collected from Colombia. The structures of the new compounds were determined using one- and two-dimensional NMR techniques. In addition, the structure of 2 was corroborated by derivatizations and single-crystal X-ray diffraction studies MH - Colombia MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000168661300024 L2 - FURANOEREMOPHILANES; FIREWEED; SPECTRA SO - Journal of Natural Products 2001 ;64(4):518-521 2494 UI - 12973 AU - Burke JP AU - Williams K AU - Haffner SM AU - Villalpando CG AU - Stern MP AD - Hosp Bernardo Sepulveda, Inst Mexicano Seguro Social,Ctr Estudios Diabet, Unidad Invest Med Enfermedades Metab, American British Cowdry Med Ctr, Mexico City, DF, MexicoUniv Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78284, USAMayo Clin, Dept Hlth Sci Res, Rochester, MN 55905, USABurke, JP, Mayo Clin, Dept Hlth Sci Res, Harwick 6,200 1st St SW, Rochester, MN 55905 USA TI - Elevated incidence of type 2 diabetes in San Antonio, Texas, compared with that of Mexico City, Mexico AB - OBJECTIVE - To compare the incidence of type 2 diabetes between low-income Mexican-Americans residing in San Antonio, Texas, and low-income residents in Mexico City, Mexico. RESEARCH DESIGN AND METHODS - Using data from the San Antonio Heart Study and the Mexico City Diabetes Study, we compared the incidence of type 2 diabetes in 35-to 64-year-old low-income Mexican-American residents of San Antonio with similarly aged low-income residents of Mexico City. Because of the different follow-up times in t e two stu ies, t e Poisson regression was used to compare the rates of diabetes. Potential risk factors for diabetes were also analyzed to determine whether they explained or contributed to a difference in incidence. RESULTS - The age- and sex-adjusted incidence of type 2 diabetes was significantly Higher in San Antonio (RR 2.01) compared with Mexico City. This difference was seen primarily in the oldest age group (55-64 years of age) and remained statistically significant after adjusting for a number of diabetes risk factors, including demographic, anthropometric, and metabolic variables. Follow-up rates were similar in both cities. CONCLUSIONS - We conclude that there was a higher incidence of type 2 diabetes in San Antonio than in Mexico City, and that difference occurred primarily in individuals in the oldest age group. The potential mediating factors we examined did not account for this difference. Other factors, such as exercise and diet, which were not available for analysis in this study, in addition to a cohort effect, may have contributed to the difference in incidence of type 2 diabetes in the two cities. In addition, there was no evidence of a higher case fatality among diabetic individuals from Mexico City compared with San Antonio MH - Mexico|Distrito Federal MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000170656800013 L2 - CARDIOVASCULAR RISK-FACTORS; AMERICANS; PREVALENCE; HYPERTENSION SO - Diabetes Care 2001 ;24(9):1573-1578 2495 UI - 13209 AU - Burlak G AU - Koshevaya S AU - Gutierrez D AU - Sanchez-Mondragon J AU - Grimalsky V AD - Autonomous State Univ Morelos, Ctr Res Engn & Appl Sci, Cuernavaca 62210, Morelos, MexicoNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoNASU, Space Res Inst, NSAU, UA-03187 Kiev, UkraineBurlak, G, Autonomous State Univ Morelos, Ctr Res Engn & Appl Sci, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Generation of short light pulses under the stimulated Brillouin scattering in fibers with an optimal feedback AB - The generation of short light pulses (less than or equal to 1 ns) in single mode fibers under pumping by wide laser pulses (of a microsecond duration) due to the backward stimulated Brillouin scattering (SBS) is numerically investigated. The influence of the acoustic diffraction is taken into account. The cases of acoustic waveguide and anti-waveguide fibers are considered. For an acoustic anti-waveguide fiber, a dependence of overlap integral S on the acoustic mode number n has a sharp peak in the region of n similar to 100. Computer simulations have demonstrated the energy conversion of the pump wave into short pulses of the signal (Stokes) wave in the case of synchronous pumping. The optimal length of the fiber should be approximately equal to the half-length of the pump pulse. The bypass time of the Stokes pulse of the optimal circuit fiber and the feedback loop must be equal to the repetition period of the pump pulse. An importance of acoustic mode structure of the fiber for the process of forming pulse train in shown. We have found that the acoustic anti-waveguide fibers with a small core (a < 3 m) can be preferable for obtaining the stable train of compressed pulses MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0306-8919 UR - ISI:000170065700006 L2 - acoustic diffraction;compression;fiber;optimal feedback;stimulated Brillouin scattering;LASER SO - Optical and Quantum Electronics 2001 ;33(6):661-673 2496 UI - 13400 AU - Busso CA AU - Briske DD AU - Olalde-Portugal V AD - Univ Nacl Sur, Dept Agron, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Nacl Sur, CONICET, CERZOS, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaTexas A&M Univ, Dept Rangeland Ecol & Management, College Stn, TX 77843, USACINVESTAV, Irapuato 36600, Guanajuato, MexicoBusso, CA, Univ Nacl Sur, Dept Agron, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - Root traits associated with nutrient exploitation following defoliation in three coexisting perennial grasses in a semi-arid savanna AB - Experiments were conducted to evaluate root traits associated with nutrient exploitation following defoliation in three coexisting perennial grasses in a semi-arid savanna. Root length density was determined within soil cores directly beneath plants, nitrogen uptake was evaluated by excised-root assay with ((NH)-N-15,),SO,, and mycorrhizal root colonization was estimated by observation of root segments. Root length density was lowest for Bouteloua curtipendula, intermediate for Eriochloa sericea, and highest for Aristida purpurea indicating that root length density was a more important trait for the mid-seral than the late-seral species. Rates of N-15 uptake were greatest in the least grazing tolerant late-seral species, E. sericea, intermediate in the mid-seral species, A. purpurea, and lowest in the most grazing tolerant late-seral species, B. curtipendula. Two successive defoliations reduced N-15 uptake 60% in the late-seral species with the greatest uptake rate (E, sericea), but not in species with lowest uptake rates (B. curtipendula). Root length colonization was consistently high (33-61%) in all three species suggesting that these C-4 perennial grasses may function as obligate mycotrophs. Contrasting responses among the two late-seral species indicate that the least grazing tolerant species, E. sericea, appears best adapted for nutrient exploitation while the most grazing tolerant species, B. curtipendula, appears best adapted for efficient nutrient retention. Contrasting responses of nitrogen uptake to short-term defoliation parallel the population responses of these two coexisting late-seral species to long-term herbivory. These data indicate that herbivory may shift interspecific competitive interactions by mediating nutrient exploitation and that a trade-off may exist between nutrient exploitation and herbivory tolerance in these species MH - Argentina MH - Mexico|Guanajuato MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 10 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000169451000016 L2 - ARBUSCULAR MYCORRHIZAL FUNGI; LOCALIZED SOIL ENRICHMENT; PLANT-COMMUNITIES; TALLGRASS PRAIRIE; DEMOGRAPHIC-EVALUATION; HERBIVORY TOLERANCE; COMPETITIVE ABILITY; GROWTH; NITROGEN; C-4 SO - Oikos 2001 ;93(2):332-342 2497 UI - 12469 AU - Buzzoni A AU - Chavez M AU - Malagnini ML AU - Morossi C AD - Telescopio Nazl Galileo, E-38700 Santa Cruz De La Palma, Canary Isl, SpainOsserv Astron Brera, Milan, ItalyInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Trieste, Dipartimento Astron, I-34131 Trieste, ItalyOsserv Astron Trieste, I-34131 Trieste, ItalyBuzzoni, A, Telescopio Nazl Galileo, AP 565, E-38700 Santa Cruz De La Palma, Canary Isl, Spain TI - Lick spectral indices for super-metal-rich stars AB - We present Lick spectral indices for a complete sample of 139 candidate super-metal-rich stars of different luminosity classes (MK type from I to V). For 91 of these stars we were able to identify, in an accompanying paper, the fundamental atmosphere parameters. This confirms that at least 2/3 of the sample consists of stars with [Fe/H] in excess of +0.1 dex. Optical indices for both observations and fiducial synthetic spectra have been calibrated to the Lick system according to Worthey et al. and include the Fe I indices of Fe5015, Fe5270, and Fe5335 and the Mg I and MgH indices of Mg-2 and Mg b at 5180 Angstrom. The internal accuracy of the observations is found to be sigma (Fe5015) = +/-0.32 Angstrom, sigma (Fe5270) = +/-0.19 Angstrom, sigma (Fe5335) = +/-0.22 Angstrom, sigma (Mg-2) = +/-0.004 mag, and sigma (Mg b) = +/-0.19 Angstrom. This is about a factor of 2 better than the corresponding theoretical indices from the synthetic spectra, the latter being a consequence of the intrinsic limitations in the input physics, as discussed by Chavez et al. By comparing models and observations, we find no evidence for nonstandard Mg versus Fe relative abundance, so [Mg/Fe] = 0, on the average, for our sample. Both the Worthey et al. and Buzzoni et al. fitting functions are found to suitably match the data and can therefore confidently be extended for population synthesis application also to supersolar metallicity regimes. A somewhat different behavior of the two fitting sets appears, however, beyond the temperature constraints of our stellar sample. Its impact on the theoretical output is discussed, as far as the integrated Mg-2 index is derived from synthesis models of stellar aggregates. A two-index plot, such as Mg-2 versus Fe5270, is found to provide a simple and powerful tool for probing distinctive properties of single stars and stellar aggregates as a whole. The major advantage, over a classical CM diagram, is that it is both reddening free and distance independent MH - Italy MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6280 UR - ISI:000171919500005 L2 - OLD STELLAR POPULATIONS; ELLIPTIC GALAXIES; GLOBULAR-CLUSTERS; MU-LEONIS; METALLICITY; INDEXES; ENRICHMENT; GIANT; FE/H; MG SO - Publications of the Astronomical Society of the Pacific 2001 ;113(789):1365-1377 2498 UI - 11635 AU - Cabanas-Moreno JG AU - Calderon HA AU - Umemoto M AU - Tsuchiya K AD - Inst Politecn Nacl, Dept Ciencia Mat, Mexico City 07300, DF, MexicoToyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 441, Japan TI - Micro and nanocrystalline intermetallics prepared by mechanical alloying and SPS AB - Production of bulk micro/nanocrystalline intermetallics has been realized through the combination mechanical alloying (MA) and spark plasma sintering (SPS). The former process yields nanocrystalline or amorphous alloyed powders; the latter enables their consolidation while maintaining a micro/nanocrystalline structure in bulk specimens. Micro/nanocrystalline intermetallic alloys based on Al-Ni, Al-Ti and Co-Ti alloy systems have been produced by MA+SPS. Densification levels from 93 up to 100% have been obtained under optimum sintering conditions. These alloys have been extensively studied to characterize their structure, composition, homogeneity and, more recently, their mechanical properties. Among several interesting features, a remarkably high mechanical strength has been found for some of these materials MH - Japan MH - Mexico|Distrito Federal PB - GENEVA AEROPORT: INDERSCIENCE ENTERPRISES LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0268-1900 UR - ISI:000174288300022 L2 - intermetallics;mechanical alloying;TiAl;Al3Ti;NiAl SO - International Journal of Materials & Product Technology 2001 ;():147-154 2499 UI - 12875 AU - Cabello-Pasini A AU - Alberte RS AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoPhycoGen Inc, Portland, ME 04101, USACabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Expression of carboxylating enzymes in Laminaria setchellii (Phaeophyceae) AB - Ribulose 1,5-bisphosphate carboxylase-oxygenase (RUBISCO) and phosphoenolpyruvate carboxykinase (PEPCK) catalyse the bulk of the carboxylation reaction in marine algae; however, little is known about the expression of these enzymes in the brown algae. The objective of this study was to assess the photosynthetic and light-independent carbon fixation (LICF) capacities along the thallus of Laminaria setchellii (Laminariales. Phycophyceae) and to relate the carboxylation patterns, to the activity and abundance of RUBISCO and PEPCK. The translocation of photosynthetic products and the synthesis of specific amino acids through photosynthetic and LICF processes were also evaluated. Photosynthetic rates and in vitro RUBISCO activity were correlated with the abundance of the RUBISCO enzyme, suggesting that differential photosynthetic capacity in different regions of the thallus is regulated by the abundance of RUBISCO. Maximum LICF and PEPCK activity values were observed in the meristematic region of L. setchellii and were positively correlated with the abundance of the enzyme in the thallus. This also indicates that LICF capacity is regulated by PEPCK abundance. Pigment levels increased from the stipe and meristem towards the laminar region of the kelp, which is consistent with the observed increase in maximum photosynthesis. Collectively, our results indicate that photosynthesis is limited in the meristematic region by low RUBISCO activity. enzyme abundance and reduced pigment levels. Translocation rates of photosynthetic products from the tip of the lamina to the meristem were 10-fold greater in plants incubated in the light than in those kept in darkness, and the bulk of the labelling was determined as aspartate. glutamate and alanine. The differences of in vivo and in vitro carboxylation along the thallus suggest the need for whole plant carboxylation measurements to achieve accurate estimates of primary productivity in L. setchellii and possibly other Laminariales MH - Mexico|Baja California MH - USA PB - LAWRENCE: INT PHYCOLOGICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0031-8884 UR - ISI:000170922300005 L2 - INDEPENDENT CARBON FIXATION; LONGITUDINAL PROFILES; MARINE MACROALGAE; PHOTOSYNTHESIS; ALGAE; SACCHARINA; HYPERBOREA; GROWTH SO - Phycologia 2001 ;40(4):351-358 2500 UI - 13481 AU - Cabello-Pasini A AU - Swift H AU - Smith GJ AU - Alberte RS AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUniv Chicago, Dept Mol Genet & Cell Biol, Chicago, IL 60637, USAMoss Landing Marine Labs, Moss Landing, CA 95039, USAPhycoGen Inc, Portland, ME 04101, USACabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Phosphoenolpyruvate carboxykinase from the marine diatom Skeletonema costatum and the phaeophyte Laminaria setchellii. II. Immunological characterization and subcellular localization AB - Phosphoenolpyruvate carboxykinase (PEPCK) is responsible for light-independent carbon fixation (LICF) processes in a wide range of marine algae, however, little is known about the intracellular localization of the enzyme among different algal groups. Antibodies against PEPCK recognized polypeptides in electrophoresed samples of cell-free extracts from only non-green phytoplankton and macrophytic Phaeophyta while antibodies against phosphoenolpyruvate carboxylase (PEPC) recognized polypeptides in samples of only chlorophytes. This supports the hypothesis that PEPCK is the dominant enzyme in LICF processes in chromophytes while PEPC is the enzyme responsible for non-photosynthetic processes in the chlorophytes. The enzyme PEPCK was immune-localized in the chloroplasts of the diatom Skeletomema costatum and the kelp Laminaria setchelli which differs from the localization of the enzymes in most vascular plants. While LICF processes occur in the cytoplasm of most vascular plants, the results of this study suggest that in marine chromophytes. LICF processes are catalyzed in the chloroplasts and that the now of carbon varies between these groups of autotrophs MH - Mexico|Baja California MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000169359900001 L2 - CARBON FIXATION; BETA-CARBOXYLATION; INTRACELLULAR-LOCALIZATION; CHLOROPLAST STROMA; PURIFICATION; ENZYMES; PHYTOPLANKTON; PLANTS; ACID; PHOTOSYNTHESIS SO - Botanica Marina 2001 ;44(3):199-207 2501 UI - 12508 AU - Cabeza JA AU - del Rio I AU - Garcia-Granda S AU - Moreno M AU - Riera V AU - Rosales-Hoz MD AU - Suarez M AD - Univ Oviedo, Inst Quim Organomet Enrique Moles, Dept Quim Organ & Inorgan, E-33071 Oviedo, SpainInst Politecn Nacl, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoCabeza, JA, Univ Oviedo, Inst Quim Organomet Enrique Moles, Dept Quim Organ & Inorgan, E-33071 Oviedo, Spain TI - Reactivity of [Ru-3(mu(3)-NPh)(mu(3)-CO)(CO)(9)] towards activated alkynes and diynes - Isolation of a trinuclear intermediate during the formation of bi- and tetranuclear products AB - Treatment of the trinuclear imido-bridged cluster compound [Ru-3(mu (3)-NPh)(mu (3)-CO)(CO)(9)] (1) with activated alkynes (methyl propynoate and methyl phenylpropynoate) and diynes (diphenylbutadiyne, 2,4-hexadiyne, 1,6-diphenyloxy-2,4-hexadiyne, and 1-trimethylsilyl-1,4-pentadiyne) in hexanes at reflux temperature leads to separable mixtures of the tetranuclear and binuclear derivatives [Ru-4(mu (4)-NPh)(mu (4), eta (2)- RC drop CR') (mu -CO)(2) (CO)(9)] and [Ru-2{mu,eta (3)-RC=CR'C(O)-NPh}(CO)(6)], respectively. While the former complexes feature a phenylimido ligand in a rather rare mu (4)-coordination mode, the binuclear compounds contain acrylamido ligands that result from the coupling of a CO ligand and the original phenylimido ligand of I with the incoming alkyne or diyne, Surprisingly, all the products derived from diynes contain a pendant (non-coordinated) alkyne functionality. The isolation of the trinuclear derivative [Ru-3(mu (3)-NPh)(mu (3),eta (2)- PhC drop CC drop CPh)(CO)(9)] (9) in the reaction of 1 with diphenylbutadiyne and the fact that its thermolysis leads to a mixture of [Ru-4(mu (4)-NPh)(mu (4,)eta (2)-PhC drop CC drop CPh)(mu -CO)(2)(CO)(9)] and [Ru-2{mu,eta (3)-C(C drop CPh)=C(Ph)C(O)NPh}(CO)(6)] support the proposal that trinuclear species containing coordinated alkyne or diyne ligands, similar to 9, are intermediates in the synthesis of all the bi- and tetranuclear products. Only one of the two possible regioisomers of each product (that might have arisen from the asymmetry of the alkyne or diyne reagents used) is formed. The origin of this regioselectivity is also discussed MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000171865400022 L2 - ruthenium;imido complexes;cluster compounds;alkynes;diynes;TRIRUTHENIUM CARBONYL CLUSTER; RAY CRYSTAL-STRUCTURE; C-C; RUTHENIUM CLUSTERS; MU-3-NITRENE LIGAND; DIRHODIUM CENTER; BOND FORMATION; NITROGEN BOND; COMPLEXES; NITROBENZENE SO - European Journal of Inorganic Chemistry 2001 ;(11):2899-2906 2502 UI - 14516 AU - Cabeza JA AU - Moreno M AU - Riera V AU - Rosales-Hoz MD AD - Univ Oviedo, CSIC, Inst Quim Organomet Enrique Moles, Fac Quim,Dept Quim Organ & Inorgan, E-33071 Oviedo, SpainInst Politecn Nacl, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoCabeza, JA, Univ Oviedo, CSIC, Inst Quim Organomet Enrique Moles, Fac Quim,Dept Quim Organ & Inorgan, E-33071 Oviedo, Spain TI - Reactivity of [Ru-3(mu-H)(mu-Me(2)pz)(CO)(10)] with 2, 4-hexadiyne. Characterization of the first tetranuclear ynenyl complex AB - The tetranuclear ynenyl complex [Ru-4(mu-eta (2)-Me(2)pz)(mu (4)-eta (4)-MeCH=C-C equivalent to CMe)(mu -CO)(CO)(10)] (Me(2)pz = 3, 5-dimethylpyrazolate) has been prepared by reaction of [Ru-3(mu -H) (mu-eta (2)-Me(2)pz)(CO)(10)] with 2, 4-hexadiyne and has been characterized by X-ray diffraction methods. It consists of an unusual broken-wing butterfly (spiked triangle) tetraruthenium framework (64-electron) with all the metal atoms bridged by a hex-2-yn-4-en-4-yl ligand (7-electron donor). This type of coordination is unprecedented for ynenyl ligands. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1387-7003 UR - ISI:000166387600016 L2 - ruthenium clusters;ynenyl ligands;diynes;pyrazolate ligands;BRIDGED RUTHENIUM(I) COMPLEXES; CARBONYL CLUSTER COMPLEXES; DIACETYLENE LIGANDS; TRINUCLEAR CLUSTERS; CRYSTAL-STRUCTURES; COUPLING REACTIONS; RU-RU; 1,3-DIYNES; DIYNES; 1,4-DIPHENYLBUTA-1,3-DIYNE SO - Inorganic Chemistry Communications 2001 ;4(1):57-59 2503 UI - 12523 AU - Cabrera-Trujillo JM AU - Robles J AD - Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, MexicoUniv Girona, Inst Quim Computac, Girona 17071, SpainUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoCabrera-Trujillo, JM, Univ Houston, Dept Chem, Univ Pk, Houston, TX 77204 USA TI - Theoretical study of the structural and electronic properties of two-dimensionally polymerized fullerene clusters with 2, 3, 4, and 7 C-60 molecules AB - The structural and electronic properties of clusters of up to 7 crosslinked C-60 molecules are calculated at the semiempirical AM1 and PM3 levels within the linear scaling divide and conquer scheme (DCM) of Yang. An uniaxial contraction of similar to 1.2% along the (c) over right arrow direction of the monomer C-60 due to the polymerization is found through our geometry optimization procedure with no symmetry restrictions. The clustering formation of four C-60 through the suggested [2+2] cycloaddition mechanism is a very favorable event, which is consistent with other theoretical results. HOMO-LUMO, gap energies decrease as the cluster size increases, predicting the possible onset of conductor behavior as size increases. Our results are in agreement with the two-dimensional C-60 polymer model proposed by Oszlanyi and Forro. The usefulness of the DCM to study these materials is shown MH - USA MH - Mexico|Guanajuato MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000171866400069 L2 - SOLID C-60; PRESSURE; DENSITY; DIMERS; CARBON; FORM SO - Physical Review B 2001 ;64(16):art-165408 2504 UI - 13648 AU - Cabrera-Valladares G AU - Matschinsky FM AU - Wang JH AU - Fernandez-Mejia C AD - Univ Nacl Autonoma Mexico, Inst Nacl Pediat, Unidad Genet Nutr, Inst Invest Biomed, Mexico City 04530, DF, MexicoUniv Penn, Med Ctr, Ctr Diabet Res, Philadelphia, PA 19104, USAUniv Calif San Francisco, Hormone Res Inst, San Francisco, CA 94143, USAFernandez-Mejia, C, Univ Nacl Autonoma Mexico, Inst Nacl Pediat, Unidad Genet Nutr, Inst Invest Biomed, Ave Iman 1,4th Floor, Mexico City 04530, DF, Mexico TI - Effect of retinoic acid on glucokinase activity and gene expression in neonatal and adult cultured hepatocytes AB - It has been shown that all-trans retinoic acid induces prematurely hepatic glucokinase mRNA in ten days-old neonatal rat hepatocytes, however, this effect could be related to the capacity of the retinoid to promote a more differentiated state of the hepatocyte. In this report we demonstrate that physiological concentrations of all-trans retinoic acid stimulate glucokinase activity in both mature fully differentiated hepatocytes and at the onset of the induction of the enzyme in 15 to 17 days-old neonatal hepatocytes, The effects produced by the retinoid were similar both in magnitude and in time, to those elicited by insulin, a well-known stimulator of hepatic glucokinase expression, No additive effect was observed when insulin and retinoic acid were tested together, Using the branched DNA assay, a sensitive signal amplification technique, we detected relative increases in glucokinase mRNA levels of about 70% at 3 and 24 h after the treatment with 10(-6) M all-trans retinoic acid, in both neonatal and adult hepatocytes, These data show that retinoic acid exerts a stimulatory effect on hepatic glucokinase independent of the hepatocyte stage of maturity and suggest a physiological role of retinoic acid on glucose metabolism. The action of retinoic acid on hepatic glucokinase might explain previous observations on the relationship between vitamin A status and liver glycogen synthesis, These findings may serve as basis for further investigations on the biological functions of retinoic acid derivatives on hepatic glucose metabolism. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000168753700005 L2 - glucokinase;hepatocytes;retinoic acid;PANCREATIC BETA-CELL; RAT HEPATOCYTES; MESSENGER-RNA; S14-GENE TRANSCRIPTION; INSULIN RELEASE; HEXOKINASE-I; VITAMIN-A; LIVER; GLUCOSE; INDUCTION SO - Life Sciences 2001 ;68(25):2813-2824 2505 UI - 14770 AU - Cabrera MEM AU - Milan MO AU - Peraza EFH AU - Hernandez HH AU - Martinez NR AU - Rieumont SO AU - Reyes MCL AD - Inst Super Ciencias & Tecnol Nucl, Habana 10600, CubaCtr Invest Mat Avanzados SC, Chihuahua 31109, Chih, MexicoEmpresa Nacl Geofis, Habana 10400, CubaININ, Mexico City, DF, MexicoCabrera, MEM, Inst Super Ciencias & Tecnol Nucl, Ave Salvador Allende & Luaces,Plaza Revoluc, Habana 10600, Cuba TI - Characterization of ophiolites from northern Havana-Matanzas petroleum fields using instrumental neutron activation analysis AB - Concentrations of 16 elements from 14 serpentinitic samples from Basilio and Cantel petroleum fields were obtained by instrumental neutron activation analysis (INAA): Cr, Co, Ni, La, Nd, Sm, Eu, Gd, Tb, Ce Yb, Lu, Rb, Cs, Hf and Th. Relative INAA was performed using certified reference materials and laboratory standards. Average elemental concentrations showed that the ophiolites have a basic character, suggesting the use of a well-logging method designed fbr volcano-sedimentary petroleum fields. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Chihuahua MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000165643600022 L2 - INAA;ophiolites;lanthanides;well-logging;COMPLEX; ROCKS; REE SO - Applied Radiation and Isotopes 2001 ;54(1):183-188 2506 UI - 13032 AU - Caceres-Cortes JR AU - varado-Moreno JA AU - Waga K AU - Rangel-Corona R AU - Monroy-Garcia A AU - Rocha-Zavaleta L AU - Urdiales-Ramos J AU - Weiss-Steider B AU - Haman A AU - Hugo P AU - Brousseau R AU - Hoang T AD - Univ Autonoma Mexico, FES Zaragoza, Res Unit Cell Differentiat & Canc, Mexico City 15000, DF, MexicoUniv Autonoma Mexico, Lab Oncol, Mexico City 15000, DF, MexicoUniv Autonoma Mexico, Immunobiol Lab, Mexico City 15000, DF, MexicoUniv Autonoma Mexico, Inst Biomed Res, Dept Mol Biol, Mexico City 15000, DF, MexicoInst Rech Biotechnol, Montreal, PQ H4P 2R2, CanadaProcrea, Montreal, PQ H4P 2R2, CanadaClin Res Inst Montreal, Hemopoiesis & Leukemia Lab, Montreal, PQ H2W 1R7, CanadaCaceres-Cortes, JR, Univ Autonoma Mexico, FES Zaragoza, Res Unit Cell Differentiat & Canc, JC Bonilla 66 Col Ejercito Oriente,Apdo Postal 9-, Mexico City 15000, DF, Mexico TI - Implication of tyrosine kinase receptor and steel factor in cell density-dependent growth in cervical cancers and leukemias AB - Cell-cell interaction is important in the expansion of leukemic cells and of solid tumors. Steel factor (SF) or Kit ligand is produced as a membrane-bound form (mSF) and a soluble form. Because both primary gynecological tumors and primary leukemic cells from patients with acute myeloblastic leukemia (AML) have been shown to coexpress c-Kit and SF, we addressed the question of whether mSF could contribute to cell interaction in these cancers. Investigations on primary cervical carcinomas have been hindered by the fact that the cells do not grow in culture. We report herein the establishment of two cervical carcinoma cell lines, CALO and INBL, that reproduce the pattern of SF/c-Kit expression observed in primary tumor samples. In addition, these cells exhibit marked density-dependent growth much in the same way as AML blasts. Using an antisense strategy with phosphorothioate-modified oligonucleotides that specifically target SF without affecting other surface markers, we provide direct evidence for a role of mSF and c-Kit in cell interaction and cell survival in these gynecological tumor cell lines as well as in primary AML blasts. Finally, our study defines the importance of juxtacrine stimulation, which may be as important, if not more, than autocrine stimulation in cancers MH - Canada MH - Mexico|Distrito Federal PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 19 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000170521100051 L2 - ACUTE MYELOBLASTIC-LEUKEMIA; C-KIT RECEPTOR; HUMAN PAPILLOMAVIRUS TYPE-16; COLONY-STIMULATING FACTOR; CLONOGENIC CELLS; AUTOCRINE GROWTH; BLAST CELLS; MYELOID-LEUKEMIA; LUNG-CANCER; EXPRESSION SO - Cancer Research 2001 ;61(16):6281-6289 2507 UI - 14492 AU - Caceres-Cortes JR AU - Krosl G AU - Tessier N AU - Hugo P AU - Hoang T AD - UNAM, FES Zaragoza, Res Unit Cell Differentiat & Canc, Fac Profess Studies, Mexico City 15000, DF, MexicoLab Hemopoiesis & Leukemia, Montreal, PQ, CanadaClin Res Inst Montreal, Montreal, PQ H2W 1R7, CanadaPROCREA BioSci Inc, Inst Rech Biotechnol, Montreal, PQ, CanadaUniv Montreal, Dept Pharmacol, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Dept Biochem, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Program Mol Biol, Montreal, PQ H3C 3J7, CanadaCaceres-Cortes, JR, UNAM, FES Zaragoza, Res Unit Cell Differentiat & Canc, Fac Profess Studies, JC Bonilla 66 Col Ejercito Oriente,Apdo Postal 9-, Mexico City 15000, DF, Mexico TI - Steel factor sustains SCL expression and the survival of purified CD34(+) bone marrow cells in the absence of detectable cell differentiation AB - CD34(+) cells express the basic helix-loop-helix transcription factor SCL, which is essential for blood cell formation in vivo. In addition, their survival is critically dependent on hemopoietic growth factors. We therefore compared the effects of Steel factor (SF) and GM-CSF on the survival, proliferation, and differentiation of primary human GD34(+) cells, as well as the role of SCL during these processes. GM-CSF suppresses apoptosis in GD3j+ cells. which proliferate and differentiate into mature granulocytic and monocytic cells (CD34-CD13(+)) and loose SCL expression. In contrast, SF suppresses apoptosis without a significant increase in cell numbers, and the cells remain CD34(+) and SCL+ with a blast-like morphology, Examination of apoptosis by the terminal deoxynucleotidyl transferase mediated dUTP-biotin nick end labeling (TUNEL) reaction and of the cell cycle status indicated that SF is both a survival factor and a mitogenic factor for CD34(+) cells. There was, however, constant cell death in a fraction of the population, which could be rescued by GR I-CSF. Go-addition of SF and GM-CSF prevents the downregulation of SCL observed in the presence of GM-CSF by itself, allows for prolonged survival and expansion of CD34(+) cells in culture, inhibits monocytic differentiation and impairs granulocytic differentiation. Finally, exposure to an antisense SCL but not a control oligonucleotide decreases SCL protein levels and prevents the suppression of apoptosis by SF without affecting GM-CSF-dependent cell survival. These observations suggest that the hemopoietic transcription factor SCL regulates the survival of CD34(+) cells in response to SF MH - Canada MH - Mexico|Distrito Federal PB - MIAMISBURG: ALPHAMED PRESS RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Oncology;Cell Biology;Hematology U5 - J;Article AV - English IS - 1066-5099 UR - ISI:000166394500006 L2 - apoptosis;hemopoietic growth factor;steel;transcription factor SCL/tal-1;differentiation;TRANSCRIPTION FACTOR GATA-1; COLONY-STIMULATING FACTORS; C-KIT LIGAND; GROWTH-FACTOR; GENE-PRODUCT; ERYTHROID-DIFFERENTIATION; HEMATOPOIETIC LINEAGES; SUPPRESSES APOPTOSIS; GM-CSF; DEATH SO - Stem Cells 2001 ;19(1):59-70 2508 UI - 14248 AU - Cadez A AU - Vidrih S AU - Galicic M AU - Carraminana A AD - Univ Ljubljana, FMF, Dept Phys, Ljubljana 1000, SloveniaINAOE, Puebla 72840, MexicoCadez, A, Univ Ljubljana, FMF, Dept Phys, Jadranska 19, Ljubljana 1000, Slovenia TI - Crab pulsar photometry and the signature of free precession AB - Optical photometry for the pulsar PSR 0531+21 has been extended with new observations that strengthen evidence for a previously observed 60 s periodicity. This period is found to be increasing with time at approximately the same rate as the rotational period of the pulsar. The observed period and its time dependence fit a simple free precession model MH - Mexico|Puebla MH - Slovenia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167131600023 L2 - stars : neutron;pulsars : individual : PSR 0531+21;rotation;oscillations;NEUTRON-STAR SO - Astronomy and Astrophysics 2001 ;366(3):930-934 2509 UI - 12529 AU - Calambokidis J AU - Steiger GH AU - Straley JM AU - Herman LM AU - Cerchio S AU - Salden DR AU - Urban J AU - Jacobsen JK AU - von Ziegesar O AU - Balcomb KC AU - Gabriele CM AU - Dahlheim ME AU - Uchida S AU - Ellis G AU - Miyamura Y AU - de Guevara PL AU - Yamaguchi M AU - Sato F AU - Mizroch SA AU - Schlender L AU - Rasmussen K AU - Barlow J AU - Quinn TJ AD - Cascadia Res Collect, Olympia, WA 98501, USAUniv Hawaii, Kewalo Basin Marine Mammal Lab, Honolulu, HI 96814, USAMoss Landing Marine Labs, Moss Landing, CA 95039, USASo Illinois Univ, Hawaii Whale Res Fdn, Edwardsville, IL 62026, USAN Gulf Ocean Soc, Homer, AK 99603, USACtr Whale Res, Friday Harbor, WA 98250, USAGlacier Bay Natl Pk, Gustavus, AK 99826, USANOAA, Natl Marine Mammal Lab, Seattle, WA 98115, USAOkinawa Expo Aquarium, Okinawa 90503, JapanPacific Biol Stn, Dept Fisheries & Oceans, Nanaimo, BC V9R 5K6, CanadaWorld Wildlife Fund Nat Japan, Tokyo, JapanUniv Nacl Autonoma Mexico, Lab Mamiferos Marinos, Mexico City 04510, DF, MexicoOgasawara Marine Ctr, Tokyo 10021, JapanNOAA, Natl Marine Mammal Lab, Seattle, WA 98115, USACascadia Res Collect, Olympia, WA 98501, USANatl Marine Fisheries Serv, SW Fisheries Sci Ctr, La Jolla, CA 92038, USAUniv Alaska Fairbanks, Juneau, AK 99801, USACalambokidis, J, Cascadia Res Collect, 2181-2 W 4th Ave, Olympia, WA 98501 USA TI - Movements and population structure of humpback whales in the North Pacific AB - Despite the extensive use of photographic identification methods to investigate humpback whales in the North Pacific, few quantitative analyses have been conducted. We report on a comprehensive analysis of interchange in the North Pacific among three wintering regions (Mexico, Hawaii, and Japan) deach with two to three subareas, and feeding areas that extended from southern California to the Aleutian Islands, Of the 6,413 identification photographs of humpback whales obtained by 16 independent research groups between 1990 and 1993 and examined for this study, 3,650 photographs were determined to be of suitable quality, A total of 1,241 matches was found by two independent matching teams, identifying 2,712 unique whales in the sample (seen one to five times). Site fidelity was greatest at feeding areas where there was a high rate of resightings in the same area in different years and a low rate of interchange among different areas. Migrations between winter regions and feeding areas did not follow a simple pattern, although highest match rates were found for whales that moved between Hawaii and southeastern Alaska, and between mainland and Baja Mexico and California. Interchange among subareas of the three primary wintering regions was extensive for Hawaii, variable (depending on subareas) for Mexico, and low for Japan and reflected the relative distances among subareas. Interchange among these primary wintering regions was rare. This study provides the first quantitative assessment of the migratory structure of humpback whales in the entire North Pacific basin MH - USA MH - Canada MH - Japan MH - Mexico|Distrito Federal PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 18 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000171809200007 L2 - humpback whale;Megaptera novaeangliae;population structure;movements;North Pacific;photo-identification;interchange;migration;MEGAPTERA-NOVAEANGLIAE; MIGRATORY DESTINATIONS; FLUKE PIGMENTATION; HAWAIIAN-ISLANDS; SAMANA BAY; CALIFORNIA; NUCLEAR; WATERS; WORLDWIDE; ABUNDANCE SO - Marine Mammal Science 2001 ;17(4):769-794 2510 UI - 14281 AU - Calaminici P AU - Koster AM AU - Carrington T AU - Roy PN AU - Russo N AU - Salahub DR AD - CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoUniv Montreal, Dept Chim, Montreal, PQ H3C 3J7, CanadaUniv Alberta, Dept Chem, Edmonton, AB T6G 2G2, CanadaUniv Calabria, Dipartimento Chim, I-87030 Arcavacata, Cs, ItalyNatl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, CanadaCalaminici, P, CINVESTAV, Dept Quim, Ave Inst Politecn Nacl 2508,AP 14-740, Mexico City 07000, DF, Mexico TI - V-3: Structure and vibrations from density functional theory, Franck-Condon factors, and the pulsed-field ionization zero-electron-kinetic energy spectrum AB - Density functional calculations of neutral and cationic vanadium trimers are presented. The all-electron calculations employed a gradient-corrected exchange-correlation functional and a newly developed vanadium basis set optimized for gradient-corrected density functional calculations. For both neutral and charged systems, different isomers were studied in order to determine the lowest energy structures. A vibrational analysis was performed in order to characterize these isomers. We found an equilateral triangle (2)A(1)' ground state for V-3 and an equilateral triangle (3)A(2)' ground state for V-3(+). The experimental pulsed-field ionization zero-electron-kinetic energy spectrum was simulated by calculating multidimensional Franck-Condon factors, using the geometries and harmonic frequencies of the calculated minima of V-3 and V-3(+). The excellent agreement between the experimental and theoretical spectra allows the unequivocal determination of the ground state structure of V-3. This work provides a final answer to the controversy in the literature about the ground state structure of V-3 and yields deeper insight into the electronic structure of the neutral and cationic systems. (C) 2001 American Institute of Physics MH - Canada MH - Italy MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 26 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000167044400021 L2 - SMALL VANADIUM CLUSTERS; PHOTOELECTRON-SPECTROSCOPY; N N-LESS-THAN-OR-EQUAL-TO-5; GEOMETRIC STRUCTURES; ALUMINUM CLUSTERS; METAL-CLUSTERS; DIMER MOLECULE; IRON CLUSTERS; ALL-ELECTRON; CR CLUSTERS SO - Journal of Chemical Physics 2001 ;114(9):4036-4044 2511 UI - 13529 AU - Calderini DF AU - Savin R AU - Abeledo LG AU - Reynolds MP AU - Slafer GA AD - Univ Buenos Aires, Fac Agron, Dept Prod Vegetal, Capital Federal, ArgentinaCIMMYT, Int Ctr Maize & Wheat Improvement, Mexico City 06600, DF, MexicoCalderini, DF, Univ Buenos Aires, Fac Agron, Dept Prod Vegetal, Av San Martin 4453,C1417DSE, Capital Federal, Argentina TI - The importance of the period immediately preceding anthesis for grain weight determination in wheat AB - Although individual grain weight is an important source of variation for grain yield, there is still poor understanding of the causes determining final grain weight. Almost all studies conducted for understanding the determinants of grain weight have been focused on the post-anthesis period. However, there is important evidence that pre-anthesis conditions could also modify final grain weight. Three experiments including different sowing dates, genotypes and temperature regimes between booting and anthesis, were carried out in Argentina and Mexico to analyse the effect of temperature and associated traits during the pre- and post-anthesis periods on grain weight under field conditions. In these experiments final grain weight could not be explained by average or maximum temperature during the post-anthesis period. However, average temperature between booting and anthesis was closely related to the observed grain weight differences, probably as a consequence of the effects of this factor on carpel growth. Differences in grain weight between genotypes and grain position were successfully explained by differences in carpel weight at anthesis. These results suggest that our knowledge to determine grain weight could improve if the immediately pre-anthesis period conditions were taken into account MH - Argentina MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 16 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000169211500033 L2 - anthesis;carpel;grain weight;wheat;HIGH-TEMPERATURE; KERNEL DEVELOPMENT; GROWTH; POSTANTHESIS; PREANTHESIS; DURATION; CEREALS; CARPEL; BARLEY; LINES SO - Euphytica 2001 ;119(1-2):199-204 2512 UI - 10668 AU - Calderon-Garciduenas L AU - Rodriguez-Alcaraz A AU - Valencia-Salazar G AU - Mora-Tascareno A AU - Garcia R AU - Osnaya N AU - Villarreal-Calderon A AU - Devlin RB AU - Van Dyke T AD - Univ N Carolina, Curriculum Toxicol, Chapel Hill, NC 27514, USAInst Nacl Pediat, Mexico City 14410, DF, MexicoSoc Mex ORL & CCC, Mexico City 14410, DF, MexicoNatl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAUniv N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599, USACalderon-Garciduenas, L, US EPA, Human Studies Div, MD 58D, Res Triangle Pk, NC 27711 USA TI - Nasal biopsies of children exposed to air pollutants AB - Southwest Metropolitan Mexico City (SWMMC) atmosphere is a complex mixture of air pollutants, including ozone, particulate matter, and aldehydes. Children in SWMMC are exposed chronically and sequentially to numerous toxicants, and they exhibit significant nasal damage. The objective of this study was to assess p53 accumulation by immunohistochemistry in nasal biopsies of SWMMC children. We evaluated 111 biopsies from 107 children (83 exposed SWMMC children and 24 control children residents in a pollutant-compliant Caribbean island). Complete clinical histories and physical examinations, including an ear nose-throat (ENT) exam were done. There was a significant statistical difference in the upper and lower respiratory symptomatology and ENT findings between control and exposed children (p<0.001). Control children gave no respiratory symptomatology in the 3 months prior to the study; their biopsies exhibited normal ciliated respiratory epithelium and were p53-negative. SWMMC children complained of epistaxis, nasal obstruction, and crusting. Irregular areas of whitish-gray recessed mucosa over the inferior and middle turbinates were seen in 25% of SWMMC children, and their nasal biopsies displayed basal cell hyperplasia, decreased numbers of ciliated and goblet cells, neutrophilic epithelial infiltrates, squamous metaplasia, and mild dysplasia. Four of 21 SWMMC children with grossly abnormal mucosal changes exhibited strong transmural nuclear p53 staining in their nasal biopsies (p 0.005, odds ratio 26). In the context of lifetime exposures to toxic and potentially carcinogenic air pollutants, p53 nasal induction in children could potentially represent. a) a checkpoint response to toxic exposures, setting up a selective condition for p53 mutation, or b) a p53 mutation has already occurred as a result of such selection. Because the biological significance of p53 nuclear accumulation in the nasal biopsies of these children is not clear at this point, we strongly suggest that children with macroscopic nasal mucosal abnormalities should be closely monitored by the ENT physician. Parents should be advised to decrease the children's number of outdoor exposure hours and encourage a balanced diet with an important component of fresh fruits and vegetables MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 10 U4 - Pathology;Toxicology U5 - J;Article AV - English IS - 0192-6233 UR - ISI:000176888500008 L2 - air pollutants;environmental;children;ozone;particulate matter;nasal carcinogenesis;protein p53;Mexico;TUMOR-SUPPRESSOR GENE; NF-KAPPA-B; RESPIRATORY EPITHELIUM; SQUAMOUS METAPLASIA; MEXICO-CITY; P53 PROTEIN; MOLECULAR EPIDEMIOLOGY; URBAN POLLUTION; RISK ASSESSMENT; LUNG-CANCER SO - Toxicologic Pathology 2001 ;29(5):558-564 2513 UI - 13541 AU - Calderon-Garciduenas L AU - Mora-Tiscareno A AU - Fordham LA AU - Chung CJ AU - Garcia R AU - Osnaya N AU - Hernandez J AU - Acuna H AU - Gambling TM AU - Villarreal-Calderon A AU - Carson J AU - Koren HS AU - Devlin B AD - US EPA, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAUniv N Carolina, Ctr Environm Med & Lung Biol, Chapel Hill, NC 27599, USAUniv N Carolina, Dept Radiol, Chapel Hill, NC 27599, USAInst Nacl Pediat, Mexico City 14410, DF, MexicoUniv N Carolina, Curriculum Toxicol, Chapel Hill, NC, USACalderon-Garciduenas, L, US EPA, Human Studies Facil, MD 58D, Res Triangle Pk, NC 27711 USA TI - Canines as sentinel species for assessing chronic exposures to air pollutants: Part 1. Respiratory pathology AB - A complex mixture of air pollutants is present in the ambient air in urban areas. People, animals, and vegetation are chronically and sequentially exposed to outdoor pollutants, The objective of this first of 2 studies is to evaluate by light and electron microscopy the lungs of Mexico City dogs and compare the results to those of 3 less polluted cities in Mexico. One hundred fifty-two clinically healthy stray mongrel dogs (91 males/61 females), including 43 dogs from 3 less polluted cities, and 109 from southwest and northeast metropolitian Mexico City (SWMMC, NEMMC) were studied. Lungs of dogs living in Mexico City and Cuernavaca exhibited patchy chronic mononuclear cell infiltrates along with macrophages loaded with particulate matter (PM) surrounding the bronchiolar walls and extending into adjacent vascular structures; bronchiolar epithelial and smooth muscle hyperplasia, peribronchiolar fibrosis, microthrombi, and capillary and venule polymorphonuclear leukocytes (PMN) margination, Ultrafine PM was seen in alveolar type I and II cells, endothelial cells, interstitial macrophages (M theta), and intravascular MB-like cells. Bronchoalveolar lavage showed significant numbers of alveolar macrophages undergoing proliferation, Exposure to complex mixtures of pollutants-predominantly particulate matter and ozone-is causing lung structural changes induced by the sustained inflammatory process and resulting in airway and vascular remodeling and altered repair, Cytokines released from both, circulating inflammatory and resident lung cells in response to endothelial and epithelial injury may be playing a role in the pathology described here. Deep concern exists for the potential of an increasing rise in lung diseases in child populations exposed to Mexico City's environment MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 14 U4 - Toxicology U5 - J;Article AV - English IS - 1096-6080 UR - ISI:000169079300018 L2 - dogs;air pollution;lungs;particulate matter;ultrafine;particulate matter;ozone;endothelial and epithelial lung dysfunction;chronic lung inflammation;lung remodeling;MEXICO-CITY AIR; POLYMORPHONUCLEAR LEUKOCYTES; INTRATRACHEAL INSTILLATION; INFLAMMATORY RESPONSE; INHALABLE PARTICLES; ENDOTHELIAL-CELLS; PERSONAL EXPOSURE; LUNG INFLAMMATION; INFANT-MORTALITY; FINE PARTICLES SO - Toxicological Sciences 2001 ;61(2):342-355 2514 UI - 13542 AU - Calderon-Garciduenas L AU - Gambling TM AU - Acuna H AU - Garcia R AU - Osnaya N AU - Monroy S AU - Villarreal-Calderon A AU - Carson J AU - Koren HS AU - Devlin RB AD - US EPA, Human Studies Facil, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAUniv N Carolina, Curriculum Toxicol, Chapel Hill, NC 27599, USAInst Nacl Pediat, Mexico City 14410, DF, MexicoUniv N Carolina, Ctr Environm Med & Lung Biol, Chapel Hill, NC 27599, USACalderon-Garciduenas, L, US EPA, Human Studies Facil, Natl Hlth & Environm Effects Res Lab, MD 58D, Res Triangle Pk, NC 27711 USA TI - Canines as sentinel species for assessing chronic exposures to air pollutants: Part 2. cardiac pathology AB - The principal objective of this study is to evaluate by light and electron microscopy (LM, EM) the heart tissues in stray southwest and northeast metropolitan Mexico City (SWMMC, NEMMC) dogs and compare their findings to those from 3 less polluted cities (Cuernavaca, Tlaxcala, and Tuxpam), Clinically healthy mongrel dogs, including 109 from highly polluted SWMMC and NEMMC, and 43 dogs from less polluted cities were studied. Dogs residing in cities with lower levels of pollutants showed little or no cardiac abnormalities. Mexico City and Cuernavaca dogs exhibited LM myocardial alterations including apoptotic myocytes, endothelial and immune effector cells, degranulated mast cells associated with scattered foci of mononuclear cells in left and right ventricles and interventricular septum, and clusters of adipocytes interspersed with mononuclear cells. Vascular changes included scattered polymorphonuclear leukocytes (PMN) margination and microthrombi in capillaries, and small venous and arteriolar blood vessels. Small veins exhibited smooth muscle cell hyperplasia, and arteriolar blood vessels showed deposition of particulate matter (PM) in the media and adventitia. Unmyelinated nerve fibers showed endoneural and epineural degranulated mast cells. EM examination of myocardial mast cells showed distended and abundant rough endoplasmic reticulum with few secretory granules. Myocardial capillaries exhibited fibrin deposition and their endothelial cells displayed increased luminal and abluminal pinocytic activity and the formation of anemone-like protrusions of the endothelium into the lumen. A close association between myocardial findings, lung epithelial and endothelial pathology, and chronic inflammatory lung changes was noted. The myocardial changes described in dogs exposed to ambient air pollutants may form the basis for developing hypothesis-driven mechanistic studies that might explain the epidemiological data of increased cardiovascular morbidity and mortality in people exposed to air pollutants MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 14 U4 - Toxicology U5 - J;Article AV - English IS - 1096-6080 UR - ISI:000169079300019 L2 - ambient air pollution;dogs;myocardium;mast cells;particulate matter;ozone;apoptotic myocytes and endothelial cells;endothelial injury;Mexico City;TUMOR-NECROSIS-FACTOR; MAST-CELLS; MYOCARDIAL ISCHEMIA/REPERFUSION; ENDOTHELIAL-CELLS; HEART-DISEASE; MEXICO-CITY; INFLAMMATION; POLLUTION; ISCHEMIA; DEATH SO - Toxicological Sciences 2001 ;61(2):356-367 2515 UI - 14110 AU - Calderon-Garciduenas L AU - Gambling TM AU - Acuna H AU - Tizapantzi R AU - Villarreal-Calderon A AU - Carson J AU - Devlin R AD - Natl Inst Pediat, Mexico City, DF, MexicoINP, Mexico City, DF, MexicoUSEPA, Washington, DC, USA TI - Ultrastructural myocardial pathology in canines exposed to air pollutants MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438100306 SO - Faseb Journal 2001 ;15(4):A54-A54 2516 UI - 14251 AU - Calderon-Garciduenas L AU - Valencia-Salazar G AU - Rodriguez-Alcaraz A AU - Gambling TM AU - Garcia R AU - Osnaya N AU - Villarreal-Calderon A AU - Devlin RB AU - Carson JL AD - US EPA, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAInst Nacl Pediatria, Mexico City, DF, MexicoSociedad Med Otorrinolaringol, Mexico City, DF, MexicoUniv N Carolina, Curriculum Toxicol, Dept Pediat, Chapel Hill, NC, USAUniv N Carolina, Curriculum Toxicol, Dept Cell Biol & Anat, Chapel Hill, NC, USAUniv N Carolina, Ctr Environm Med & Lung Biol, Chapel Hill, NC, USACalderon-Garciduenas, L, US EPA, Natl Hlth & Environm Effects Res Lab, MD 58D, Res Triangle Pk, NC 27711 USA TI - Ultrastructural nasal pathology in children chronically and sequentially exposed to air pollutants AB - Southwest Metropolitan Mexico City (SWMMC) children are repeatedly exposed to a complex mixture of air pollutants, including ozone, particulate matter, and aldehydes. Nasal biopsies taken from these children exhibit a wide range of histopathologic alterations: marked changes in ciliated and goblet cell populations, basal cell hyperplasia, squamous metaplasia, and mild dysplasias. We studied the ultrastructural features of 15 nasal biopsies obtained from clinically healthy children 4 to 15 yr of age, growing up in SWMMC. The results were compared with nasal biopsies from 11 children growing up in Veracruz and exposed to low pollutant levels. Ultrathin sections of nasal biopsies revealed an unremarkable mucociliary epithelium in control children, whereas SWMMC children showed an epithelium comprised of variable numbers of basal, ciliated, goblet, and squamous metaplastic as well as intermediate cells. Nascent ciliated cells, as evidenced by the presence of migratory kinetosomes, were common, as were ciliary abnormalities, including absent central microtubules, supernumerary central and peripheral tubules, ciliary microtubular discontinuities, and compound cilia. Dyskinesia associated with these abnormal cilia was suggested by the altered orientation of the central microtubules in closely adjacent cilia. A transudate was evident between epithelial cells, suggesting potential deficiencies in epithelial junction integrity. Particulate matter was present in heterolysosomal bodies in epithelial cells and it was also deposited in intercellular spaces. The severe structural alteration of the nasal epithelium together with the prominent acquired ciliary defects are likely the result of chronic airway injury in which ozone, particulate matter, and aldehydes are thought to play a crucial role. The nasal epithelium in SWMMC children is fundamentally disordered, and their mucociliary defense mechanisms are no longer intact. A compromised nasal epithelium has less ability to protect the lower respiratory tract and may potentially leave the distal acinar airways more vulnerable to reactive gases. Impairment of mucociliary clearance has the potential to increase the contact time between deposited mutagenic particulate matter and the epithelial surface, thus increasing the risk for nasal carcinogenesis. Chronic exposures to air pollutants affect the whole respiratory tract; the nasal epithelium is an accessible and valuable sentinel to monitor exposures to toxic or carcinogenic substances MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Cell Biology;Respiratory System U5 - J;Article AV - English IS - 1044-1549 UR - ISI:000167157000005 L2 - MEXICO-CITY; RESPIRATORY EPITHELIUM; NITROGEN-DIOXIDE; URBAN POLLUTION; OZONE EXPOSURE; LAVAGE FLUID; FORMALDEHYDE; CELLS; INFLAMMATION; PARTICLES SO - American Journal of Respiratory Cell and Molecular Biology 2001 ;24(2):132-138 2517 UI - 13702 AU - Calderon HA AU - Garibay-Febles V AU - Cabrera A AU - Cabanas-Moreno JG AU - Umemoto M AD - IPN, ESFM, Dept Ciencia Mat, Mexico City 07738, DF, Mexico. Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan TI - Mechanical properties of nanocrystalline TiAl-X and TiAl3-X prepared by mechanical alloying and sintering AB - Production of intermetallic materials in the systems TiAl-X and TiAl3-X (X = Cr, Mn, Fe) has been achieved by means of mechanical milling and sintering techniques. The produced materials have grain sizes in the nano and microscale depending on the material and processing variables. The average grains size range between 30 and 280 nm. Sintered materials in the TiAl-X system are constituted by the gamma and the alpha (2) phases while the Al3Ti-X alloys are formed only by the cubic L1(2) phase. Compression tests are performed to evaluate their mechanical properties as a function of temperature and grains size. In all cases yield stresses higher that 1 GPa are obtained together with a ductility that depends upon temperature and grains size. No ductility is found for the smallest grains sizes tested (30 nm) MH - Japan MH - Mexico|Distrito Federal T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBS10Q AV - English IS - 0255-5476 UR - ISI:000168667500037 L2 - intermetallic materials;mechanical alloying;mechanical properties;nanocrystalline materials SO - 2001 ;():229-234 2518 UI - 14290 AU - Calderon J AU - Navarro ME AU - Jimenez-Capdeville ME AU - Santos-Diaz MA AU - Golden A AU - Rodriguez-Levya I AU - Borja-Aburto V AU - az-Barriga F AD - Univ Autonoma San Luis Potosi, Fac Med, Dept Biol Celular, Lab Toxicol Ambiental, San Luis Potosi 78210, MexicoCUNY Mt Sinai Sch Med, Dept Community & Prevent Med, New York, NY 10029, USACtr Nacl Salud Ambiental, Mexico City, DF, MexicoCalderon, J, Univ Autonoma San Luis Potosi, Fac Med, Dept Biol Celular, Lab Toxicol Ambiental, Av Venustiano Carranza 2405, San Luis Potosi 78210, Mexico TI - Exposure to arsenic and lead and neuropsychological development in Mexican children AB - This cross-sectional study examined the effects of chronic exposure to lead (Pb), arsenic (AS) and undernutrition on the neuropsychological development of children. Two populations chronically exposed to either high (41 children) or low (39 children) levels of As and Pb were analyzed using the Wechsler Intelligence Scale for Children, Revised Version, for Mexico (WISC-RM). Geometric means of urinary arsenic (AsU) and lead in blood (PbB) were 62.9+/-0.03 (mu gAs/g creatinine) and 8.9 +/- 0.03 (mug/dl) for the exposed group and 40.2 +/- 0.03 (mu gAs/g creatinine) and 9.7 +/- 0.02 (mug/dl) for the reference group. The height for age index (HAI) was used as an indicator of chronic malnutrition and sociodemographic information was obtained with a questionnaire. Lead and arsenic were measured by atomic absorption spectrophotometry. Data on full, verbal, and performance intelligence quotients (IQ) scores, long-term memory, linguistic abstraction, attention span, and visuospatial organization were obtained through the WISC-RM. After controlling for significant potential confounders verbal IQ (P < 0.01) decreased with increasing concentrations of AsU. The HAI correlated positively with full-scale and performance IQ (P < 0.01). Higher levels of AsU were significantly related to poorer performance on WISC-RM factors examining long-term memory and linguistic abstraction, while lower scores in WISC-RM factors measuring attention were obtained at increasing values of PbB. Our results suggest that exposure to As and chronic malnutrition could have an influence on verbal abilities and long-term memory, while Pb exposure could affect the attention process even at low levels. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 50 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000167027900002 L2 - arsenic;lead;malnutrition;neuropsychological development;IQ;attention;INTERNATIONAL GROWTH REFERENCE; PORT-PIRIE COHORT; COGNITIVE FUNCTION; IRON-DEFICIENCY; LEVEL; INTELLIGENCE; INDICATORS; CADMIUM; INFANTS SO - Environmental Research 2001 ;85(2):69-76 2519 UI - 13384 AU - Calderon JS AU - Cespedes CL AU - Rosas R AU - Gomez-Garibay F AU - Salazar JR AU - Lina L AU - Aranda E AU - Kubo I AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Estado Morelos, Ctr Invest Biotecnol, Cuernavaca, Morelos, MexicoUniv Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720, USACespedes, CL, Univ Nacl Autonoma Mexico, Inst Quim, Ciudad Univ,Coyoacan, Mexico City 04510, DF, Mexico TI - Acetylcholinesterase and insect growth inhibitory activities of Gutierrezia microcephala on fall armyworm Spodoptera frugiperda J. E. Smith AB - From the aerial parts of Gutierrezia microcephala (Asteraceae). four oxyflavones were isolated, namely 5,7.2 ' -trihydroxy-3,6,8,4 ' ,5 ' -pentamethoxyflavone (1): 5,7.4 ' -trihydroxy-3,6,8-trimethoxyflavone (2): 5,7,2 ' ,4 ' -tetrahydroxy-3,6,8,5 ' -tetramethoxyflavone (3); 5,2 ' -dihydroxy-3,6,7,8,4 ' ,5 ' -hexamethoxyflavone (4), and an ent-clerodane, bacchabolivic acid (5). Compounds 1-5, the synthetic methyl ester (6), n-hexane and MeOH extracts were evaluated against the fall armyworm (Spodoptera frugiperda). Gedunin, a known insect growth regulator isolated from Cedrela spp. was used as a positive control. When tested for activity on neonate larvae into the no-choice artificial diet bioassay, flavone (1), clerodane (5). its methyl ester (6), MeOH and n-hexane extracts caused significant larval mortality with MC50 of 3.9, 10.7, 3.46, 7.95 and 7.5 ppm at 7 days, respectively, as well as growth reduction. They also increased the development time of surviving larvae and a significant delay in time to pupation and adult emergence. Acute toxicity against adults of S. frugiperda was also found. 5, 6, gedunin and n-hexane extract had the most potent activity with LD50 value of 6.59, 15.05, 10.78, and 12.79 ppm, respectively. In addition, MeOH, n-hexane extracts. 5, 6 and gedunin caused acetylcholinesterase inhibition with 93.7, 100, 90.2, 62.0 and 100% at 50.0 ppm, respectively: whereas 1-4 exhibited only moder ate inhibitory activity. Compounds 1, 5 and 6 showed inhibitory activities comparable with gedunin. These compounds could be responsible of the insect growth inhibitory activity of this plant MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000169467800011 L2 - clerodane;insect growth regulator activity;acetylcholinesterase;POTATO BEETLE LARVAE; FEEDING-BEHAVIOR; FLAVONOIDS; ANTIFEEDANTS; ASTERACEAE; DITERPENES; LITTORALIS; LIMONOIDS; MELIACEAE; RESINOSA SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2001 ;56(5-6):382-394 2520 UI - 12703 AU - Caleyo F AU - Baudin T AU - Penelle R AU - Venegas V AD - Inst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoUniv Paris Sud, Lab Physicochim Etat Solide, CNRS, UMR 8648, F-91405 Orsay, FranceUP ALM, Lab Pesados Met, Dept Ingn Met, IPN,ESIQIE, Mexico City 07300, DF, MexicoCaleyo, F, Inst Nacl Invest Nucl, Dept Fis, AP 18-1027,Col Escandon, Mexico City 11801, DF, Mexico TI - EBSD study of the development of cube recrystallization texture in Fe-50%Ni MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000171306900007 L2 - nickel alloys;recrystallization;EBSD;microtexture;grain boundaries;FCC METALS; DEFORMATION; MECHANISM; GRAINS SO - Scripta Materialia 2001 ;45(4):413-420 2521 UI - 13184 AU - Caleyo F AU - Baudin T AU - Mathon MH AU - Penelle R AD - Inst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoUniv Paris 11, Lab Physicochim Etat Solide, CNRS, UMR 8648, F-91405 Orsay, FranceCENS, Leon Brillouin Lab, CNRS, CEA, F-91191 Gif Sur Yvette, FranceCaleyo, F, Inst Nacl Invest Nucl, Dept Fis, AP 18-1027,Col Escandon, Mexico City 11801, DF, Mexico TI - Comparison of several methods for the reproduction of the orientation distribution function from pole figures in medium to strong textured materials AB - A quantitative comparison of the errors introduced by several methods for the reproduction of the crystallographic orientation distribution function from poles figures is presented. The harmonic, ADC, WIMV and component methods have been employed in the characterization of the deformation and recrystallization textures of a Fe-50% Ni alloy in order to investigate the accuracy associated with each one of these methods. To carry out this study, experimental and synthetic pole figures have been used as input data. The strong and weak points of each method are examined showing that the iterative discrete methods (ADC and WIMV) are better suited for the reproduction of the texture function in the present case. In comparing these two discrete methods, it is evidenced that the ADC method reproduces more accurately both the experimental and synthetic texture functions over the entire range of texture sharpness considered MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 1286-0042 UR - ISI:000170215600002 L2 - POSITIVITY METHOD SO - European Physical Journal-Applied Physics 2001 ;15(2):85-96 2522 UI - 14449 AU - Caleyo F AU - Baudin T AU - Penelle R AU - Venegas V AD - Inst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoUniv Paris Sud, Lab Physico Chim Etat Solide, UMR CNRS 8648, F-91405 Orsay, FranceInst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 07738, DF, MexicoCaleyo, F, Inst Nacl Invest Nucl, Dept Fis, Apartado Postal 18-1027,Col Escandon, Mexico City 11801, DF, Mexico TI - Orientation correlations in primary recrystallized Fe-50%Ni AB - The correlations between orientations of neighboring grains have been investigated in a Fe-50%Ni alloy after primary recrystallization and normal grain growth. Boundary misorientations have been determined by systematic measurement of individual grain orientations by Electron Back-Scattered Diffraction (EBSD). It is shown that the recrystallization process in Fe-50%Ni gives rise to noticeable orientation correlations for Sigma3 " and low-angle orientation relationships. Such correlations result mainly from the non-random spatial distribution of orientations and from the grain size dependence on orientation developed in these alloys during recrystallization. In the present alloy. the grain growth process leads to minor variations in the orientation correlations associated with low-angle misorientations and reduces considerably those related to Sigma3 " orientation relationships. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000166511200028 L2 - nickel alloys;EBSD;orientation correlations;microtexture;grain boundaries;BOUNDARY-CHARACTER-DISTRIBUTION; GRAIN-GROWTH; COPPER; TEXTURE; ALLOYS; ENSEMBLES SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2001 ;298(1-2):227-234 2523 UI - 12842 AU - Calvo E AU - Pelejero C AU - Herguera JC AU - Palanques A AU - Grimalt JO AD - CSIC, ICER, Dept Quim Ambiental, ES-08034 Barcelona, SpainCICESE, Ensenada, Baja California, MexicoCSIC, ICM, Grp Geol Marina, Barcelona 08003, Catalonia, SpainCalvo, E, CSIC, ICER, Dept Quim Ambiental, Jordi Girona 18, ES-08034 Barcelona, Spain TI - Insolation dependence of the southeastern Subtropical Pacific sea surface temperature over the last 400 kyrs AB - The present study describes the first sea surface temperature (SST) reconstruction in the southeastern Subtropical Pacific Ocean, offshore the South American coast. The obtained record encompasses the last 400 kyr and follows the characteristic glacial/interglacial pattern defined by global ice volume, However, SST leads the delta O-18 isotopic record reflecting the role of the low latitudes areas in driving climate change. SST in the Holocene is lower by about 0.5-0.8 degreesC than maximal SST in stages 5e, 7, 9 and 11. SST in stages 2-4 is lower by about 0.6-1.3 degreesC than minimal SST in stages 6, 8 and 10. These features are similar to SST records obtained in the South Atlantic Ocean pointing to a general inter-basinal behaviour at these low latitudes. For most of the record, the observed long-term SST evolution is well correlated with the orbital parameter of eccentricity, which modulates the insolation at low latitudes. However, at low eccentricity values (Stages 11-9 and Termination I), SST is driven by obliquity, exhibiting a dependence from high latitude climatic responses MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000171008500049 L2 - EQUATORIAL PACIFIC; DEGLACIATION; CLIMATE; PRODUCTIVITY; VARIABILITY; ALKENONES; ATLANTIC; HISTORY SO - Geophysical Research Letters 2001 ;28(12):2481-2484 2524 UI - 14360 AU - Calvo JR AU - Reiter RJ AU - Garcia JJ AU - Ortiz GG AU - Tan DX AU - Karbownik M AD - Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78229, USAUniv Sevilla, Dept Med Biochem & Mol Biol, E-41009 Seville, SpainUniv Zaragoza, Dept Physiol & Pharmacol, E-50009 Zaragoza, SpainIMSS, CIBO, Guadalajara, Jalisco, MexicoUniv Lodz, Inst Endocrinol, Dept Thyroidol, PL-91425 Lodz, PolandReiter, RJ, Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, Mail Code 7762,7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Characterization of the protective effects of melatonin and related indoles against alpha-naphthylisothiocyanate-induced liver injury in rats AB - The protective effect of melatonin, 6-hydroxymelatonin and N-acetylserotonin against alpha -naphthylisothiocyanate (ANIT)-induced liver injury was investigated and compared in rats injected once with the hepatotoxicant (75 mg/kg body weight). In rats injected with ANIT alone, liver injury with cholestasis developed within 24 h, as indicated by both serum levels of alanine aminotransferase (SGPT) and aspartic acid aminotransferase (SGOT) activities and serum total bilirubin concentration. The administration of melatonin or 6-hydroxymelatonin (10 mg/kg body weight) to ANIT-injected rats reduced significantly the serum levels of both SGPT and SCOT and the serum total bilirubin concentration. For all hepatic biochemical markers, melatonin was more effective that 6-hydroxymelatonin. By comparison, the administration of N-acetylserotonin (10 mg/kg body weight) to ANIT-injected rats did not reduce the serum levels of either hepatic enzymes or the serum total bilirubin concentration. In ANIT-injected rats, hepatic lipid peroxidation (LPO) was significantly higher than in control animals and this increase was significantly reduced by either melatonin, 6-hydroxymelatonin or N-acetylserotonin. Furthermore, ANIT treatment caused a significant reduction in liver microsomal membrane fluidity and this reduction was completely reversed by the three indoles. The liver from ANIT-injected rats showed several histopathological alterations; above all there was an acute infiltration of polymorphonuclear neutrophils and an increase in the number of apparent apoptotic hepatocytes. The concurrent administration of melatonin reduced the severity of a[ I morphological alterations, specially the neutrophil infiltration and the number of presumed apoptotic cells. On the contrary, the administration of 6-hydroxymelatonin or N-acetylserotonin did not provide any protective effect in terms of the histopathological alterations. These results indicate that melatonin protects against ANIT-induced liver injury with cholestasis in rats, and suggests that this protective effect is likely due to its antioxidant properties and above all to its capacity to inhibit liver neutrophil infiltration, a critical factor in the pathogenesis of ANIT-induced liver injury. 6-hydroxymelatonin, although able to provide partial protection against the ANIT-induced hepatic injury,probably th rough its antioxidant properties by mechanisms that are unclear, was unable to reduce neutrophil infiltration. Finally, N-acetylserotonin in the experimental conditions of this study, only exhibited some antioxidant protection but had no protective effect against ANIT-induced hepatic damage. I. Cell. Biochem. 80:461-470, 2001. (C) 2001 Wiley-Liss, Inc MH - Mexico|Jalisco MH - Poland MH - Spain MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 0730-2312 UR - ISI:000166754600001 L2 - melatonin;indoles;alpha-naphthylisothiocyanate;liver injury;lipid peroxidation;membrane fluidity;MICROSOMAL MEMBRANE FLUIDITY; LIPID-PEROXIDATION; IN-VITRO; N-ACETYLSEROTONIN; NITRIC-OXIDE; CELLS; BILE; ANTIOXIDANT; NEUTROPHILS; HEPATOCYTES SO - Journal of Cellular Biochemistry 2001 ;80(4):461-470 2525 UI - 11953 AU - Camacho A AU - Camacho-Galvan A AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Nacl Autonoma Mexico, Fac Ingn, DEP, Mexico City 04510, DF, MexicoCamacho, A, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - Quantum nondemolition measurements of a particle in electric and gravitational fields AB - In this work we obtain a nondemolition variable for the case in which a charged particle moves in the electric and gravitational fields of a spherical body. Afterwards we consider the continuous monitoring of this nondemolition parameter, and calculate, along the ideas of the so called restricted path integral formalism, the corresponding propagator. Using these results the probabilities associated with the possible measurement outputs are evaluated. The limit of our results, as the resolution of the measuring device goes to zero, is analyzed, and the dependence of the corresponding propagator upon the strength of the electric and gravitational fields is commented. The role that mass plays in the corresponding results, and its possible connection with the equivalence principle at quantum level, axe studied MH - Germany MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000173439600012 L2 - EQUIVALENCE PRINCIPLE; MECHANICS; GRAVITY; OSCILLATOR SO - International Journal of Modern Physics D 2001 ;10(6):859-868 2526 UI - 13122 AU - Camacho A AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyRetorno Rancho Arco, Mexico City 04920, DF, MexicoCamacho, A, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - Quantum nondemolition measurements of a particle in an inhomogeneous gravitational field AB - In this work we obtain a family of quantum nondemolition variables for the case of a particle moving in an inhomogeneous gravitational field, Afterwards, we calculate the corresponding propagator, and deduce the probabilities associated with the possible measurement outputs. The comparison, with the case in which the position is being monitored, will allow us to find the differences with respect to the case of a quantum demolition measuring process MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000170261700014 L2 - inhomogeneous gravitational field;quantum effects;EQUIVALENCE PRINCIPLE; INDUCED INTERFERENCE; SELF-MEASUREMENT; UNIVERSE; TIME SO - General Relativity and Gravitation 2001 ;33(5):901-911 2527 UI - 14658 AU - Camart JF AU - Malabre M AU - Martinez-Garcia JC AD - Inst Rech Commun & Cybernet Nantes, CNRS UMR 6597, F-44321 Nantes 03, FranceIPN, CINVESTAV, Dept Automat Control, Mexico City 07300, DF, MexicoMalabre, M, Inst Rech Commun & Cybernet Nantes, CNRS UMR 6597, 1 Rue Noe,BP 92101, F-44321 Nantes 03, France TI - Fixed poles of simultaneous disturbance rejection and decoupling: a geometric approach AB - When the simultaneous disturbance rejection and regular block decoupling problem by static state feedback is solvable, and under some unrestrictive minimality assumption, all the poles of the closed-loop system can be placed, except the so-called fixed poles (which are present for any solution). We present here a geometric characterization for this set of fixed poles as well as a constructive procedure (based on geometric tools) for designing a feedback solution of the problem which assigns the remaining poles to arbitrary prespecified locations. (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000165909700016 L2 - linear multivariable systems;disturbance rejection;decoupling;fixed poles;stability;pole assignment;geometric approach;structural approach SO - Automatica 2001 ;37(2):297-302 2528 UI - 13774 AU - Campanelli M AU - Khanna G AU - Laguna P AU - Pullin J AU - Ryan MP AD - Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, GermanyPenn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, Davey Lab 104, University Pk, PA 16802, USALong Isl Univ, Southampton Coll, Div Nat Sci, Southampton, NY 11968, USAPenn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCampanelli, M, Max Planck Inst Gravitat Phys, Albert Einstein Inst, Muhlenberg 1, D-14476 Golm, Germany TI - Perturbations of the Kerr spacetime in horizon-penetrating coordinates AB - We derive the Teukolsky equation for perturbations of a Kerr spacetime when the spacetime metric is written in either ingoing or outgoing Kerr-Schild form. We also write explicit formulae for setting up the initial data for the Teukolsky equation in the time domain in terms of a 3-metric and an extrinsic curvature, The motivation of this work is to have in place a formalism to study the evolution in the 'close limit' of two recently proposed solutions to the initial-value problem in general relativity that are based on Kerr-Schild slicings. A perturbative formalism in horizon-penetrating coordinates is also very desirable in connection with numerical relativity simulations using black hole 'excision' MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000168505800010 L2 - BLACK-HOLE COLLISIONS; INITIAL DATA SO - Classical and Quantum Gravity 2001 ;18(8):1543-1554 2529 UI - 13559 AU - Campillo A AU - Olivares J AD - Univ Valladolid, Dept Algebra Geometr & Topol, E-47005 Valladolid, SpainCtr Invest Matemat, Guanajuato 36000, MexicoCampillo, A, Univ Valladolid, Dept Algebra Geometr & Topol, E-47005 Valladolid, Spain TI - Polarity with respect to a foliation and Cayley-Bacharach Theorems AB - We prove that a foliation of degree different from one on the projective plane (defined over any algebraically closed ground field), is uniquely determined by its subscheme of singular points (which we call the singular subscheme of the foliation). Conversely, we provide three different characterizations of those subschemes that are the singular subscheme of some foliation MH - Mexico|Guanajuato MH - Spain PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0075-4102 UR - ISI:000169089300004 L2 - VECTOR-FIELDS; CURVES SO - Journal fur Die Reine und Angewandte Mathematik 2001 ;534():95-118 2530 UI - 14061 AU - Campos D AU - Pereira JR AU - Reinhardt RR AU - Carracedo C AU - Poli S AU - Vogel C AU - Martinez-Cedillo J AU - Erazo A AU - Wittreich J AU - Eriksson LO AU - Carides AD AU - Gertz BJ AD - Merck Res Labs, Clin Pharmacol, Rahway, NJ 07065, USASan Isidro Cent Hosp, Buenos Aires, DF, ArgentinaInst Enfermedades Neoplasicas, Lima, PeruArnaldo Vieira Carvalho, Inst Canc, Sao Paulo, BrazilFdn Arturo Lopez Perez, Santiago, ChileISSSTE, Mexico City, DF, MexicoInst Nacl Cancerol, Mexico City, DF, MexicoGertz, BJ, Merck Res Labs, Clin Pharmacol, RY33-600,POB 2000, Rahway, NJ 07065 USA TI - Prevention of cisplatin-induced emesis by the oral neurokinin-1 antagonist, MK-869, in combination with granisetron and dexamethasone or with dexamethasone alone AB - Purpose: The NK1-receptor antagonist MK-869 (L-754,030) has demonstrated antiemetic activity in humans receiving chemotherapy. Objectives of the present trial included the first assessment of oral MK-869 plus dexamethasone compared with a 5HT(3) antagonist plus dexamethasone for prevention of acute and delayed emesis after high-dose cisplatin. Furthermore, the study sought to confirm that addition of MK-869 to a 5HT(3) antagonist plus dexamethasone was more effective than just the 5HT(3) antagonist plus dexamethasone for prevention of acute and delayed emesis. Patients and Methods: This multicenter, double-blind, parallel-group trial in 351 cisplatin-naive patients evaluated prevention of acute (0 to 24 hours) and delayed emesis (primary efficacy parameter; days 2 to 5) after cisplatin (greater than or equal to 70 mg/m(2)). Patients were randomized to four groups (1 to IV) (n = number randomized; number evaluable): granisetron (10 mug/kg intravenously) pre-cisplatin followed by placebo on days 2 to 5 (group I) (n = 90; 90); granisetron and MK-869 (400 mg PO [by mouth]) pre-cisplatin, followed by MK-869 (300 mg PO) on days 2 to 5 (group II) (n = 86; 84); MK-869 (400 mg PO) the evening before and pre-cisplatin, followed by MK-869 (300 mg PO) on days 2 to 5 (group III) (n = 89; 88); or MK-869 (400 mg PO) pre-cisplatin, followed by MK-869 (300 mg PO) on days 2 to 5 (group IV) (n = 86; 84). All patients also received dexamethasone (20 mg PO) before cisplatin. Additional medication wets available to treat emesis or nausea at any time. Results: In the acute period, 57%, 80%, 46%, and 43% of patients were without emesis in groups I, II, III, and IV, respectively (P < .01 for group II v group I). In the delayed period, the proportion of patients without emesis in groups I, II, III, and IV was 29%, 63%, 51%, and 57%, respectively (P < .01 for groups It, III, and IV v group I). The distribution of nausea scares in the delayed period was lower when comparing group II with group I (P < .05 for days 1 to 5 and days 2 to 5). One serious adverse event (dizziness) was rated as possibly related to MK-869. Conclusion: Once daily oral administration of MK-869 was effective in reducing delayed emesis and nausea after high-dose cisplatin. However, the combination of the 5HT3 antagonist plus dexamethasone was numerically superior to MK-869 plus dexamethasone in reducing acute emesis. Confirming and extending previous findings, the triple combination of a 5HT(3) antagonist, MK-869, and dexamethasone provided the best control of acute emesis. <(c)> 2001 by American Society of Clinical Oncology MH - Argentina MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - USA MH - Peru PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 77 U4 - Oncology U5 - J;Article AV - English IS - 0732-183X UR - ISI:000167652500022 L2 - TACHYKININ NK1 RECEPTOR; HIGH-DOSE CISPLATIN; ONDANSETRON PLUS DEXAMETHASONE; PATIENTS RECEIVING CISPLATIN; CHEMOTHERAPY-INDUCED EMESIS; INDUCED DELAYED EMESIS; DOUBLE-BLIND; INDUCED NAUSEA; RANDOMIZED TRIALS; PLACEBO SO - Journal of Clinical Oncology 2001 ;19(6):1759-1767 2531 UI - 13096 AU - Campos E AU - Manning RB AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoSmithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20560, USACampos, E, Univ Autonoma Baja California, Fac Ciencias, Apartado Postal 2300, Ensenada, Baja California, Mexico TI - Authorship and diagnosis of the genus Arcotheres Manning, 1993 (Crustacea : Brachyura : Pinnotheridae) AB - The pinnotherid generic name Arcotheres was first published by Burger (1895) as a synonym of Pinnotheres Bose, 1802, and thus is unavailable. The generic name must be attributed to Manning (1993), who first recognized it as a genus distinct from Pinnotheres. The type species is Pinnotheres palaensis Burger, 1895. Nine other species of Pinnotheres named by Burger in 1895 are transferred to Arcotheres. Members of the genus, inhabitants of bivalves, are restricted to the Indo-Pacific region MH - Mexico|Baja California MH - USA PB - SINGAPORE: NATL UNIV SINGAPORE, SCHOOL BIOLOGICAL SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0217-2445 UR - ISI:000170390100016 L2 - Crustacea;Pinnotheridae;genus Arcotheres;Diagnosis;Authorship SO - Raffles Bulletin of Zoology 2001 ;49(1):167-170 2532 UI - 13467 AU - Caneda-Guzman IC AU - de Chambrier A AU - Scholz T AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, Mexicode Chambrier, A, Museum Hist Nat, Dept Invertebrates, POB 6434, CH-1211 Geneva 6, Switzerland TI - Thaumasioscolex didelphidis n. gen., n. sp (Eucestoda : Proteocephalidae) from the black-eared opossum Didelphis marsupialis from Mexico, the first proteocephalidean tapeworm from a mammal AB - Thaumasioscolex didelphidis n. gen., n. sp. is described from the intestine of the black-eared opossum Didelphis marsupialis L. (Marsupialia: Didelphidae) from Los Tuxtlas, Veracruz, Mexico. The new genus differs from all proteocephalidean genera in the morphology of the scolex that is formed by 4 well separated lobes each containing 1 noncircular sucker opening laterally inside the exterolateral cavity, a large-sized body (length up to 1 m), a large number of testes, the shape of gravid proglottids that are inversely craspedote (the anterior border of a proglottid overlaps the posterior border of a preceding proglottid), eggs in groups mostly of 4-6 eggs each, and an embryophore bearing digitiform projections on its external surface. This is the first tapeworm of the Proteocephalidea, the members of which were previously reported exclusively from poikilotherm vertebrates (freshwater fishes, amphibians, and reptiles), found in a homoiotherm vertebrate MH - Mexico|Distrito Federal MH - Switzerland PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 10 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000169392000023 L2 - FRESH-WATER FISHES; SCOLEX MORPHOLOGY; PALEARCTIC REGION; SP CESTODA; PARASITES; ZYGOBOTHRIINAE; MONTICELLIDAE; GENERA; BRAZIL; HOST SO - Journal of Parasitology 2001 ;87(3):639-646 2533 UI - 11843 AU - Canizal G AU - Ascencio JA AU - Gardea-Torresday J AU - Yacaman MJ AD - Inst Nacl Invest Nucl, Ocoyoacac, Edo, MexicoUniv Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Ctr Nano & Mol Technol, Texas Mat Inst, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCanizal, G, Inst Nacl Invest Nucl, Km 36-5 Carretera Mexico Toluca, Ocoyoacac, Edo, Mexico TI - Multiple twinned gold nanorods grown by bio-reduction techniques AB - In this work we present a new method to produce gold nanorods based on the bio-reduction process. The nanorods produced tend to show twins appearing either as bands or concentric forms, generating a new type of nanorods based on a decahedral structure. Examples of these two types of twins are presented here. The main conclusion is that the bio-reduction method to produce nanorods is a good alternative to the electrochemical methods MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1388-0764 UR - ISI:000173729900014 L2 - gold nanorods;particle synthesis;bio-reduction;biomass particles SO - Journal of Nanoparticle Research 2001 ;3(5-6):475-481 2534 UI - 12609 AU - Cano MV AU - Rodriguez E AU - Feikin D AU - Bronstein DE AU - Lindsley M AU - Iqbal N AU - Morgan D AU - Kirkman L AU - Mirza S AU - Morgan J AU - Warnock DW AU - Kuri P AU - Hajjeh RA AD - CDC, Atlanta, GA 30333, USAMexico Minist Hlth, Mexico City, DF, Mexico TI - Histoplasmosis outbreak among college students - Acapulco, Mexico, 2001 MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000171226900056 SO - Clinical Infectious Diseases 2001 ;33(7):1093-1093 2535 UI - 12872 AU - Canoba A AU - Lopez FO AU - Arnaud MI AU - Oliveira AA AU - Neman RS AU - Hadler JC AU - Iunes PJ AU - Paulo SR AU - Osorio AM AU - Aparecido R AU - Rodriguez C AU - Moreno V AU - Vasquez R AU - Espinosa G AU - Golzarri JI AU - Martinez T AU - Navarrete M AU - Cabrera I AU - Segovia N AU - Pena P AU - Tamez E AU - Pereyra P AU - Lopez-Herrera ME AU - Sajo-Bohus L AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoAutoridad Reguladora Nucl, Buenos Aires, DF, ArgentinaUniv Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, BrazilUniv Estadual Paulista, Sao Pablo, BrazilComis Ecuatoriana Energia Atom, Quito, EcuadorUNAM, Fac Quim, Mexico City, DF, MexicoInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoPontificia Univ Catolica Peru, Lima 100, PeruUniv Simon Bolivar, Caracas, VenezuelaEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Indoor radon measurements and methodologies in Latin American countries AB - According to the current international guidelines concerning environmental problems, it is necessary to evaluate and to know the indoor radon levels, specially since most of the natural radiation dose to man comes from radon gas and its progeny. Several countries have established National Institutions and National Programs for the study of radon and its connection with lung cancer risk and public health. The aim of this work is to present the indoor radon measurements and the detection methods used for different regions of Latin America (LA) in countries such as Argentina, Brazil, Ecuador, Mexico, Peru and Venezuela. This study shows that the passive radon devices based on alpha particle nuclear track methodology (NTM) is one of the more generalized methods in LA for long term indoor radon measurements, CR-39, LR-115 and Makrofol being the more commonly used detector materials. The participating institutions and the radon level measurements in the different countries are presented in this contribution. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Brazil MH - Ecuador MH - Mexico|Distrito Federal MH - Peru MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000170916200097 L2 - indoor radon;detection methodologies;Latin American countries;MEXICO SO - Radiation Measurements 2001 ;34(1-6):483-486 2536 UI - 13038 AU - Canovas MJ AU - Lopez MA AU - Parra J AU - Todorov MI AD - Univ Alicante, Dept Stat & Operat Res, E-03071 Alicante, SpainMiguel Hernandez Univ Elche, Ctr Operat Res, E-03202 Alicante, SpainBenemerita Univ Autonoma Puebla, Fac Ciencias Fisicomatemat, Puebla 72000, MexicoLopez, MA, Univ Alicante, Dept Stat & Operat Res, E-03071 Alicante, Spain TI - Solving strategies and well-posedness in linear semi-infinite programming AB - In this paper we introduce the concept of solving strategy for a linear semi-infinite programming problem, whose index set is arbitrary and whose coefficient functions have no special property at all. In particular, we consider two strategies which either approximately solve or exactly solve the approximating problems, respectively. Our principal aim is to establish a global framework to cope with different concepts of well-posedness spread out in the literature. Any concept of well-posedness should entail different properties of these strategies, even in the case that we are not assuming the boundedness of the optimal set. In the paper we consider three desirable properties, leading to an exhaustive study of them in relation to both strategies. The more significant results are summarized in a table, which allows us to show the double goal of the paper. On the one hand, we characterize the main features of each strategy, in terms of certain stability properties (lower and upper semicontinuity) of the feasible set mapping, optimal value function and optimal set mapping. On the other hand, and associated with some cells of the table, we recognize different notions of Hadamard well-posedness. We also provide an application to the analysis of the Hadamard well-posedness for a linear semi-infinite formulation of the Lagrangian dual of a nonlinear programming problem MH - Mexico|Puebla MH - Spain PB - BUSSUM: BALTZER SCI PUBL BV RP - NOT IN FILE U3 - TC 8 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0254-5330 UR - ISI:000170559000009 L2 - stability;Hadamard well-posedness;semi-infinite programming;feasible set mapping;optimal set mapping;optimal value function;INEQUALITY SYSTEMS; STABILITY THEORY SO - Annals of Operations Research 2001 ;101():171-190 2537 UI - 13276 AU - Cantelar E AU - Lifante G AU - Calderon T AU - Melendrez R AU - Millan A AU - Alvarez MA AU - Barboza-Flores M AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainUniv Autonoma Madrid, Dept Quim Agricola Geol Geoquim, E-28049 Madrid, SpainUniv Sonora, Ctr Invest Fis, Hermosillo, Sonora, MexicoUniv Sevilla, Fac Quim, Dept Cristalog Mineral & Quim Agricola, E-41071 Seville, SpainCantelar, E, Univ Autonoma Madrid, Dept Fis Mat, C-4, E-28049 Madrid, Spain TI - Optical characterisation of rare earths in natural fluorapatite AB - Fluorapatite coming from Jumilla (Spain) has been investigated by means of optical absorption, photoluminescence and lifetimes. The absorption spectra at room and low temperature in the range 450-850 nm showed mainly the presence of Nd3+ ions. The emission and excitation spectra in the UV region reveal also the presence of Ce3+ ions, which cannot be detected by absorption due to the tail of the matrix absorption edge. In addition to the infrared emission at 0.89, 1.06 and 1.33 mum coming from the Nd3+ ions and the UV emission around 380 nm due to the presence of Ce3+ ions, an intense red emission (lambda = 600 nm) is observed after blue-green excitation. Following the characteristics of the red band as well as its lifetime (tau = 132 mus) this emission has been attributed to the presence of Pr3+ ions. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Sonora MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000169967300187 L2 - fluorapatite;semi-precious mineral;luminescence;rare earth;energy transfer;CRYSTALS SO - Journal of Alloys and Compounds 2001 ;323():851-854 2538 UI - 14012 AU - Capovilla R AU - Montesinos M AU - Prieto VA AU - Rojas E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Maryland, Dept Phys, College Pk, MD 20742, USACapovilla, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - BF gravity and the Immirzi parameter AB - We propose a novel BF-type formulation of real four-dimensional gravity, which generalizes previous models. In particular, it allows for an arbitrary Immirzi parameter. We also construct the analogue of the Urbantke metric for this model MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Letter AV - English IS - 0264-9381 UR - ISI:000167882000001 L2 - QUANTUM GENERAL-RELATIVITY; SPIN NETWORKS; FORMULATION; VARIABLES; MODEL; REAL SO - Classical and Quantum Gravity 2001 ;18(5):L49-L52 2539 UI - 13818 AU - Cardoso JL AU - Pereyra P AU - nzaldo-Meneses A AD - UAM Azcapotzalco, Mexico City, DF, MexicoAbdus Salam Int Ctr Theoret Phys, Trieste, ItalyCardoso, JL, UAM Azcapotzalco, Ave S Pablo 180,Codigo Postal 02200, Mexico City, DF, Mexico TI - Transport and spin effects in homogeneous magnetic superlattice AB - Homogeneous semiconductors exhibit spin-band splitting and displacements under spatially periodic external magnetic fields, which are more clearly defined than in diluted magnetic semiconductor superlattices. We study the influence of the geometrical parameters and the spin-field interaction on the electronic transport properties. We show that by varying the external magnetic field one can easily block the transmission of either the spin-up or the spin-down electrons MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000168215400007 L2 - GIANT MAGNETORESISTANCE; MULTILAYERS; SEMICONDUCTORS; SCATTERING; VALVES; FIELD SO - Physical Review B 2001 ;6315(15): 2540 UI - 14314 AU - Carey JR AU - Liedo P AU - Muller HG AU - Wang JL AU - Love B AU - Harshman L AU - Partridge L AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAEl Colegio Frontera Sur, Tapachula, Chiapas, MexicoUniv Calif Davis, Dept Stat, Davis, CA 95616, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE, USAUniv Coll London, Dept Biol, London WC1E 6BT, EnglandCarey, JR, Univ Calif Davis, Dept Entomol, Davis, CA 95616, USA TI - Female sensitivity to diet and irradiation treatments underlies sex-mortality differentials in the Mediterranean fruit fly AB - Large-scale experiments on medflies that were subjected to sterilizing doses of ionizing radiation (plus intact controls) and maintained on either sugar-only or full, protein-enriched diets revealed that, whereas the mortality trajectories of both intact and irradiated male cohorts maintained on both diets are similar, the mortality patterns of females are highly variable. Mean mortality rates at 35 days in male cohorts ranged from 0.2 to 0.3 but in female cohorts ranged from 0.09 to 0.35, depending on treatment. The study reports three main influences: (a) qualitative differences exist in the sex-mortality response of medflies subjected to dietary manipulations and irradiation; (b) the female mortality response is linked to increased vulnerability due to the nutritional demands of reproduction; and (c) female sensitivity to environmental changes underlies the dynamics of the sex-mortality differential MH - United Kingdom MH - Mexico|Chiapas MH - USA PB - WASHINGTON: GERONTOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 3 U4 - Geriatrics & Gerontology;Gerontology U5 - J;Article AV - English IS - 1079-5006 UR - ISI:000166936400006 L2 - LARGE MEDFLY COHORTS; DROSOPHILA-MELANOGASTER; LONGEVITY; REPRODUCTION; FLIES; RATES; TEPHRITIDAE; LIFETABLES; DIPTERA; COSTS SO - Journals of Gerontology Series A-Biological Sciences and Medical Sciences 2001 ;56(2):B89-B93 2541 UI - 12413 AU - Carigi L AU - Gilmore G AU - Hernandez X AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandCarigi, L, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Chemical evolution models of local dSph galaxies MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900042 L2 - DWARF SO - Astrophysics and Space Science 2001 ;277():195-195 2542 UI - 12913 AU - Carinena JF AU - Ramos A AU - Fernandez DJ AD - Univ Zaragoza, Fac Ciencias, Dept Fis Teor, E-50009 Zaragoza, SpainInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoCarinena, JF, Univ Zaragoza, Fac Ciencias, Dept Fis Teor, E-50009 Zaragoza, Spain TI - Group theoretical approach to the intertwined Hamiltonians AB - We show that the finite difference Backlund formula for the Schrodinger Hamiltonians is a particular element of the transformation group on the set of Riccati equations considered by two of us in a previous paper. Then, we give :group theoretical explanation to the problem of Hamiltonians related by a first order differential operator. A generalization of the finite difference algorithm relating eigenfunctions of three different Hamiltonians is found, and some illustrative examples of the theory are analyzed. finding new potentials for which one eigenfunction and its corresponding eigenvalue is exactly known. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000170927300003 L2 - MATRIX RICCATI-EQUATIONS; QUANTUM-MECHANICS; SUPERPOSITION FORMULAS; FACTORIZATION METHOD; DERIVATIVE SUPERSYMMETRY; DARBOUX TRANSFORMATION; SHAPE INVARIANCE; POTENTIALS; INTEGRABILITY; PRINCIPLES SO - Annals of Physics 2001 ;292(1):42-66 2543 UI - 13951 AU - Carpenter FL AU - Mayorga SP AU - Quintero EG AU - Schroeder M AD - Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Inst Geol, Dept Edafol, Mexico City 04510, DF, MexicoCarpenter, FL, Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697 USA TI - Land-use and erosion of a Costa Rican Ultisol affect soil chemistry, mycorrhizal fungi and early regeneration AB - Deforestation causes soil erosion, especially in the humid tropics where rainfall is heavy and terrain is often steep. Land-uses, such as overgrazing and planting annual crops on slopes exacerbate the resultant land degradation. Consequent loss of productivity in this area of the world is on a collision course with increasing human population density and the demand for food. Because of the serious nature of erosion, its effects on tropical soil, especially biological characteristics that help reestablish soil fertility, need more study. Here, we used apparent erosion intensity, land-use history, and soil color to find eight sites representing an a priori spatial gradient of soil degradation on an overgrazed Costa Rican farm. We tested the gradient by measuring several chemical factors that indicate fertility of these tropical Ultisols. These factors decreased with increasing degree of soil degradation. Next, we assessed spore density and diversity of arbuscular mycorrhizal fungi (AMF) along the gradient. We found that the diversity and composition of AMF changed across the gradient although not in the same pattern as the chemical factors. Finally, three years of vegetative regeneration after cattle exclusion had not improved the soils chemically but some improvement in AMF status was suggested for the less damaged sites. These results show that local farmers can use common sense cues to determine the chemical and biological status of their soils, that they can use these cues in future land-use decisions, such as planting hardy trees in the most degraded sites, and that they must expect severely degraded sites to require many years for recuperation. It is possible that intervention to improve the AMF status of soils could hasten recovery, since this process seems to be the first to occur. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000167955700001 L2 - rain forest degradation;tropical Ultisols;arbuscular mycorrhizal fungi (AMF);erosion;tropical revegetation;tropical degraded pastures;Costa Rica;VESICULAR-ARBUSCULAR MYCORRHIZAE; ENDOMYCORRHIZAL FUNGI; ERODED SOILS; SUCCESSION; DIVERSITY; INFECTION; DYNAMICS; GROWTH; ROOTS; LOTUS SO - Forest Ecology and Management 2001 ;144(1-3):1-17 2544 UI - 13493 AU - Carrari F AU - Perez-Flores L AU - Lijavetzky D AU - Enciso S AU - Sanchez R AU - ech-Arnold R AU - Iusem N AD - Univ Buenos Aires, FCEyN, Lab Fisiol & Biol Mol, RA-1053 Buenos Aires, DF, ArgentinaUniv Autonoma Metropolitana Iztapalapa, DCBS, Dept Ciencias Salud, Iztapalapa, DF, MexicoUniv Buenos Aires, Fac Agron, IFEVA, Buenos Aires, DF, ArgentinaIusem, N, Univ Buenos Aires, FCEyN, Lab Fisiol & Biol Mol, RA-1053 Buenos Aires, DF, Argentina TI - Cloning and expression of a sorghum gene with homology to maize vp1. Its potential involvement in pre-harvest sprouting resistance AB - Pre-harvest sprouting (PHS) in sorghum is related to the lack of a normal dormancy level during seed development and maturation. Based on previous evidence that seed dormancy in maize is controlled by the vp1 gene, we used a PCR-based approach to isolate two Sorghum bicolor genomic and cDNA clones from two genotypes exhibiting different PHS behaviour and sensitivity to abscisic acid (ABA). The two 699 amino acid predicted protein sequences differ in two residues at positions 341 (Gly or Cys within the repression domain) and 448 (Pro or Ser) and show over 80, 70 and 60% homology to maize, rice and oat VP1 proteins respectively. Expression analysis of the sorghum vp1 gene in the two lines shows a slightly higher level of vp1 mRNA in the embryos susceptible to PHS than in those resistant to PHS during embryogenesis. However, timing of expression was different between these genotypes during this developmental process. Whereas for the former the main peak of expression was observed at 20 days after pollination (DAP), the peak in the latter was found at later developmental stages when seed maturation was almost complete. Under favourable germination conditions and in the presence of fluridone (an inhibitor of ABA biosynthesis), sorghum vp1 mRNA showed to be consistently correlated with sensitivity to ABA but not with ABA content and dormancy MH - Argentina MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0167-4412 UR - ISI:000169130600002 L2 - dormancy;germination;pre-harvest sprouting;Sorghum bicolor;vp1 gene;TRANSCRIPTIONAL ACTIVATOR; ABA LEVELS; QTL ANALYSIS; VIVIPAROUS-1; SENSITIVITY; DORMANCY; EMBRYOS; WHEAT; VARIETIES; PROGRAMS SO - Plant Molecular Biology 2001 ;45(6):631-640 2545 UI - 13409 AU - Carreon-Martinez LB AU - Huerta-Diaz MA AU - Nava-Lopez C AU - Siqueiros-Valencia A AD - Inst Invest Oceanol, Coronado, CA 92178, USAUniv Autonoma Nuevo Leon, Fac Biol, San Nicolas Los Garza 66451, Nuevo Leon, MexicoInst Invest Oceanol, Ensenada 22830, Baja California, MexicoHuerta-Diaz, MA, Inst Invest Oceanol, PMB-133,POB 189003, Coronado, CA 92178 USA TI - Mercury and silver concentrations in sediments from the port of Ensenada, Baja California, Mexico MH - USA MH - Mexico|Baja California MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000169401400022 L2 - Mexico;Baja California;Ensenada;silver;mercury;sediments;ESTUARINE SEDIMENTS; SAGUENAY-FJORD; TRACE-METALS; REDUCTION; PYRITE; REMOBILIZATION; RESUSPENSION; OXIDATION; MINERALS; SULFUR SO - Marine Pollution Bulletin 2001 ;42(5):415-418 2546 UI - 13975 AU - Carrillo JA AU - Sanchez MA AU - Platonov A AU - Redondo JM AD - UPC, Dept Appl Phys, Barcelona, SpainConsejo Nacl Ciencia & Tecnol, Mexico City, DF, MexicoRedondo, JM, UPC, Dept Appl Phys, Barcelona, Spain TI - Coastal and interfacial mixing. Laboratory experiments and satellite observations AB - Studies of mixing in coastal waters have been made using different parameters like the Rossby Deformation radius, the Rossby number and the flux and gradient Richardson numbers. In order to describe the structure of density interfaces and fronts and their hydrodynamic behavior, we have analyzed in laboratory conditions different mixing processes near density interfaces to investigate experimentally the structure of these interfaces. The behaviour of both horizontal and vertical mixing fronts is studied and compared. We use a video analysis technique where mixing processes are recorded and analyzed by means of the DigImage software. We present in our analysis the evolution of the fronts and the local velocity fields, in term of the local gradient Richardson number in both vertical and horizontal mixing events. The horizontal structures are also compared with satellite observations of coastal induced eddies (Platonov and Redondo, 1999). (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Meteorology & Atmospheric Sciences;Oceanography;Water Resources U5 - J;Article AV - English IS - 1464-1909 UR - ISI:000167816400010 SO - Physics and Chemistry of the Earth Part B-Hydrology Oceans and Atmosphere 2001 ;26(4):305-311 2547 UI - 12463 AU - Carrozzo R AU - Capuano O AU - Vazquez-Memije ME AU - Chichierchia G AU - Santorelli FM AD - Bambino Gesu Pediat Hosp, Mol Med Unit, Rome, ItalyCtr Med Nacl IMSS, Hosp Pediat, Unidad Invest Genet Humana, Mexico City, DF, Mexico TI - Comparison studies in four different mutations located in the ATPase 6 gene MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901804 SO - American Journal of Human Genetics 2001 ;69(4):490-490 2548 UI - 14144 AU - Carrozzo R AU - Tessa A AU - Vazquez-Memije ME AU - Piemonte F AU - Patrono C AU - Malandrini A AU - onisi-Vici C AU - Vilarinho L AU - Villanova M AU - Schagger H AU - Federico A AU - Bertini E AU - Santorelli F AD - IRCCS Osped Bambino Gesu, Dept Neurosci, Rome, ItalyCtr Med Nacl, Unidad Invest Med Genet, Mexico City, DF, MexicoUniv Siena, Neurol Inst, I-53100 Siena, ItalyInst Med Genet J de Magalhaes, Porto, PortugalIRCCS Ist Ortoped Rizzoli, Neuromuscular Unit, Bologna, ItalyUniv Frankfurt Klinikum, Zentrum Biol Chem, D-6000 Frankfurt, GermanySantorelli, F, IRCCS Bambino Gesu, Mol Med, Piazza S Onofrio 4, I-00165 Rome, Italy TI - The T9176G mtDNA mutation severely affects ATP production and results in Leigh syndrome AB - The authors identified a novel mtDNA mutation (T9176G) in the ATPase 6 gene in a family in which a 10-year-old girl had a severe neurodegenerative disorder, her elder sister had died of Leigh syn drome (LS), and a maternal uncle had a spinocerebellar disorder. Biochemical studies disclosed a reduced rate of ATP synthesis in skin fibroblast cultures from the proposita as the likely explanation of her severe illness. The findings expand the genetic variants associated with LS MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Portugal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 32 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0028-3878 UR - ISI:000167415000026 L2 - MITOCHONDRIAL; HETEROGENEITY SO - Neurology 2001 ;56(5):687-690 2549 UI - 12406 AU - Cartas-Fuentevilla R AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Chicago, Enrico Fermi Inst, Chicago, IL 60637, USACartas-Fuentevilla, R, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Local continuity laws on the phase space of Einstein equations with sources AB - Local continuity equations involving background fields and variations of the fields, are obtained for a restricted class of solutions of the Einstein-Maxwell and Einstein-Weyl theories using a new approach based on the concept of the adjoint of a differential operator. Such covariant conservation laws are generated by means of decoupled equations and their adjoints in such a way that the corresponding covariantly conserved currents possess some gauge-invariant properties and are expressed in terms of Debye potentials. These continuity laws lead to both a covariant description of bilinear forms on the phase space and the existence of conserved quantities. Differences and similarities with other approaches and extensions of our results are discussed MH - Mexico|Puebla MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000172022100018 L2 - ADJOINT OPERATORS; PERTURBATIONS; FIELD SO - Classical and Quantum Gravity 2001 ;18(17):3629-3637 2550 UI - 10505 AU - Carvajal-Mariscal I AU - Sanchez-Silva F AU - Toledo-Velazquez M AU - Pronin VA AD - IPN, SEPI, ESIMEZ, Thermal Hydraul Appl Engn Lab, Mexico City 07738, DF, MexicoMoscow Power Engn Inst, Fac Heat Engn, Moscow, RussiaCarvajal-Mariscal, I, IPN, SEPI, ESIMEZ, Thermal Hydraul Appl Engn Lab, Edif 5-3rd Floor, Mexico City 07738, DF, Mexico TI - Experimental study on the local convective coefficient distribution on a pipe surface with inclined fins AB - Experimental results for the convective coefficient distribution in both the inside and conical end zones of the extended surface in a finned pipe are presented for three different flow velocities. The devices were located in a physical model of a staggered square pitch arrangement in which the pipes were disposed very close together and exposed to a transverse air flow. The fin inclination angle with respect to the axis was gammadegrees = 20degrees, the fin height H = 15 mm, the pipe diameter D = 28 mm and the distance between fins s = 8 mm. The results show that the convective coefficient distributions in the conical region and in the inside region of the fin are quite different. For three velocities of flow (u = 10-40 m/s) higher values of the convective coefficient were obtained in the conical region of the fin, near the junction of the fin with the pipe. On the other hand, the higher values in the internal face of the fin were located in wider regions of the lateral extremes of the fin. Only for Re approximate to 20000 the zones with higher values of convective coefficient were located near the junction of the fin with the pipe. The heat transfer coefficient distribution on the pipe surface is very similar to the one obtained for a flat cylinder. From the experimental results, the formula to calculate the heat transfer of a tube with fins inclined in an angle of gammadegrees = 20degrees was developed. This formula considers the separation between the tubes, the parameters of the fins and the arrangement of the bank of tubes. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Engineering, Mechanical;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0894-1777 UR - ISI:000177361000010 L2 - convective coefficient;finned pipe;unconventional shape of fin SO - Experimental Thermal and Fluid Science 2001 ;25(5):293-299 2551 UI - 13939 AU - Carvalho ACT AU - Ruiz-Palacios GM AU - Ramos-Cervantes P AU - Cervantes LE AU - Jiang X AU - Pickering LK AD - Inst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoEastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23501, USARuiz-Palacios, GM, Inst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Molecular characterization of invasive and noninvasive Campylobacter jejuni and Campylobacter coli isolates AB - Campylobacter jejuni is one of the most common causes of bacterial diarrhea worldwide and is the primary bacterial cause of food-borne illness. Adherence to and invasion of epithelial cells are the most important pathogenic mechanisms of Campylobacter diarrhea, Molecular characterization of invasive and noninvasive Campylobacter isolates from children with diarrhea and symptom-free children was performed by random amplified polymorphic DNA techniques (RAPD). A distinct RAPD profile with a DNA band of 1.6 lib was observed significantly more frequently among invasive (63%) than among noninvasive (16%) Campylobacter isolates (P = 0.000005). The 1.6-kb band was named the invasion-associated marker (IAM). Using specifically designed primers, a fragment of 518 bp of the iam locus was amplified in 85% of invasive and 20% of noninvasive strains (P = 0.0000000). Molecular typing with a PCR-restriction fragment length polymorphism assay which amplified the entire iam locus showed a HindIII restriction fragment polymorphism pattern associated mainly with invasive strains. Although cluster analysis of the RAPD fingerprinting showed genetic diversity among strains, two main clusters were identified. Cluster I comprised significantly more pathogenic and invasive isolates, while cluster II grouped the majority of nonpathogenic, noninvasive isolates. These data indicate that most of the invasive Campylobacter strains could be differentiated from noninvasive isolates by RAPD analysis and FCR using specific primers that amplify a fragment of the iam locus MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 18 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000167946500028 L2 - GUILLAIN-BARRE-SYNDROME; POLYMORPHIC DNA ANALYSIS; HELICOBACTER-PYLORI; ARBITRARY PRIMERS; BINDING-PROTEIN; STRAINS; INFECTION; CELLS; PCR; IDENTIFICATION SO - Journal of Clinical Microbiology 2001 ;39(4):1353-1359 2552 UI - 13641 AU - Casas-Vazquez J AU - del Castillo LF AU - Jou D AU - Criado-Sancho M AD - Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoInst Estudis Catalans, Barcelona 08001, Catalonia, SpainUNED, Dept Ciencias & Tecn Fisicoquim, Madrid 28040, SpainCasas-Vazquez, J, Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, Spain TI - Legendre transform in the thermodynamics of flowing polymer solutions AB - We propose a Legendre transform linking two different choices of nonequilibrium variables (viscous pressure tensor and configuration tensor) in the thermodynamics of flowing polymer solutions. This may avoid some current confusions in the analysis of thermodynamic effects in polymer solutions under flow MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000168730800100 L2 - EXTENDED IRREVERSIBLE THERMODYNAMICS; PHASE-SEPARATION; SHEAR-FLOW; INTERNAL VARIABLES; FLUCTUATIONS; EQUATIONS; SHIFT SO - Physical Review e 2001 ;6305(5): 2553 UI - 13397 AU - Casas M AU - Davidson NJ AU - de Llano M AU - Mamedov TA AU - Puente A AU - Quick RM AU - Rigo A AU - Solis MA AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainUniv Pretoria, Dept Phys, ZA-0002 Pretoria, South AfricaHacettepe Univ, Dept Engn Phys, TR-06532 Ankara, TurkeyAzerbaijan Acad Sci, Inst Phys, Baku 370143, AzerbaijanUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexicode Llano, M, Natl Autonomous Univ Mexico, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - Statistical model of superconductivity in a 2D binary boson-fermion mixture AB - A two-dimensional (2D) assembly of noninteracring, temperature-dependent, composite-boson Cooper pairs (CPs) in chemical and thermal equilibrium with unpaired fermions is examined in a binary boson-fermion statistical model as the superconducting singularity temperature is approached from above. The model is derived from first principles for the BCS model inter-fermion interaction from three extrema of the system Helmholtz free energy (subject to constant pairable-fermion number) with respect to: (a) the pairable-fermion distribution function; (b) the number of excited (bosonic) CPs, i.e., with nonzero total momenta-usually ignored in BCS theory-and with the appropriate (linear, as opposed to quadratic) dispersion relation that arises From the Fermi sea; and (c) the number of CPs with zero total momenta. Compared with the BCS theory condensate, higher singularity temperatures for the Bose-Einstein condensate are obtained in the binary boson-fermion mixture model which are in rough agreement with empirical critical temperatures for quasi-2D superconductors. (C) 2001 Elsevier Science B.V. All rights reserved MH - Azerbaijan MH - Mexico|Distrito Federal MH - South Africa MH - Spain MH - Turkey PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000169425900010 L2 - binary gas;boson-fermion mixture;Bose-Einstein condensation;PAIR DISPERSION-RELATION; VALENCE-BOND STATE; EINSTEIN CONDENSATION; BCS-SUPERCONDUCTIVITY; COOPER PAIRS; T-C; ORGANIC SUPERCONDUCTORS; ATTRACTIVE INTERACTIONS; COHERENCE LENGTH; HARMONIC TRAP SO - Physica A-Statistical Mechanics and Its Applications 2001 ;295(3-4):425-440 2554 UI - 12649 AU - Cascales C AU - Zaldo C AU - Caldino U AU - Sole JG AU - Luo ZD AD - CSIC, Inst Ciencia Mat, E-28049 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainChinese Acad Sci, Fujian Inst Res Struct Matter, Fujian 350002, Peoples R ChinaCascales, C, CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain TI - Crystal field analysis of Nd3+ energy levels in monoclinic NdAl3(BO3)(4) laser AB - The energies of 135 Kramers doublets extending up to the (2)H1(11/2) multiplet for Nd3+ in a monoclinic C2/c space group (No 15) NdAl3(BO3)(4) (NAB) single crystal laser have been determined from polarized optical absorption and photoluminescence measurements at 7 K. The strongly polarized character of the Nd spectra has been discussed under the assumption of a local D-3 symmetry, higher than the C-2 symmetry of NAB, and the observed energy levels have been labelled with the adequate crystal quantum numbers and irreducible representations. A detailed Hamiltonian of 21 parameters has been used in the simulation of the energy levels and associated wavefunctions of the 4f(3) configuration of Nd3+. The diagonalized complete energy matrix combines simultaneously the free-ion and single-particle crystal field interactions. Starting B-q(k) CF parameters were calculated from the semi-empirical simple overlap model SOM. A comparative simulation considering the C2 symmetry of NAB is provided. Moreover, two-electron CF interactions as well as an empirical correction have been tested in calculating the anomalous splitting of the (2)H2(11/2) levels. A final fit in D-3 symmetry produces a very good adjustment with a low rms deviation sigma = 15.3 cm(-1) between observed and calculated energy levels MH - Mexico|Distrito Federal MH - Peoples R China MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000171415800019 L2 - OPTICAL-ABSORPTION SPECTRUM; NEODYMIUM ALUMINUM BORATE; ND-3+ IONS; POLARIZATION; TRIFLUORIDE SO - Journal of Physics-Condensed Matter 2001 ;13(35):8071-8085 2555 UI - 13585 AU - Casini H AU - Montemayor R AU - Urrutia LF AD - Univ Oxford, Oxford OX1 3NP, EnglandUniv Nacl Cuyo, Inst Balseiro, RA-8400 Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, CAB, RA-8400 Bariloche, Rio Negro, ArgentinaCNEA, RA-8400 Bariloche, Rio Negro, ArgentinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoCasini, H, Univ Oxford, 1 Keble Rd, Oxford OX1 3NP, England TI - Dual theories for mixed symmetry fields. Spin-two case: (1,1) versus (2,1) Young symmetry type fields AB - We show that the parent Lagrangian method gives a natural generalization of the dual theories concept for non p-form fields. Using this generalization we construct here a three-parameter family of Lagrangians that are dual to the Fierz-Pauli description of a free massive spin-two system. The dual field is a three-index tenser T-(mu nu)rho, which dynamically belongs to the (2, 1) representation of the Lorentz group. As expected, the massless limit of our Lagrangian, which is parameter independent, has two propagating degrees of freedom per space point. (C) 2001 Published by Elsevier Science B.V MH - Argentina MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000168882000043 L2 - GENERALIZED GAUGE-FIELDS; MAGNETIC MONOPOLES; VORTICES; STRINGS SO - Physics Letters B 2001 ;507(1-4):336-344 2556 UI - 14272 AU - Caspeta-Mandujano JM AU - Moravec F AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicCaspeta-Mandujano, JM, Autonomous Univ Morelos State, Biol Res Ctr, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Two new species of Rhabdochonids (Nematoda : Rhabdochonidae) from freshwater fishes in Mexico, with a description of a new genus AB - Two new nematode species, Beaninema nayaritense n. gen., n. sp. and Rhabdochona xiphophori n. sp., are described on the basis of the specimens recovered from the gall bladder and intestine of 2 fishes, Cichlasoma beani (Jordan) (Cichlidae, Pereiformes) and Xiphophorus sp. (Pocciliidae. Cyprinodontiformes), respectively, from Mexico. The monotypic genus Beaninema differs from other rhabdochonid genera mainly in the presence of large conical teeth in the middle of the prostom. Rhabdochona xiphophori is characterized mainly by a unique structure of the prostom (presence of 6 anterior teeth; dorsal and ventral teeth unusually broad, with 2 lateral horns) and the shape of the deirids (bifureated, with markedly long base) MH - Czech Republic MH - Mexico|Morelos PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 13 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000167017100023 SO - Journal of Parasitology 2001 ;87(1):139-143 2557 UI - 12719 AU - Castellano EE AU - Piro OE AU - Caram JA AU - Mirifico MV AU - Aimone SL AU - Vasini EJ AU - Marquez-Lucero A AU - Glossman-Mitnik D AD - LAQUICOM, CIMAV, Chihuahua 31109, Chih, MexicoUniv Sao Paulo, Dept Fis, Inst Fis & Quim Sao Carlos, BR-13560 Sao Carlos, SP, BrazilNatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, PROFIMO, RA-1900 La Plata, ArgentinaNatl Univ La Plata, INIFTA, CONICET, RA-1900 La Plata, ArgentinaGlossman-Mitnik, D, LAQUICOM, CIMAV, Miguel de Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Chih, Mexico TI - Crystallographic study and molecular orbital calculations of thiadiazole derivatives. Part 3: 3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide, 3,4-diphenyl-1,2,5-thiadiazolidine 1,1-dioxide and 4-ethoxy-5-methyl-3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide AB - Single-crystal X-ray diffraction studies are reported for 3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide (I), 3,4-diphenyl-1,2,5-thiadiazolidine 1,1-dioxide(II) and 4-ethoxy-5-methyl-3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide (III). Ab initio MO calculations on the electronic structure, conformation and reactivity of these compounds are also reported and compared with the X-ray results. A charge sensitivity analysis is performed on the results applying concepts derived from density functional theory, obtaining several sensitivity coefficients such as the molecular energy, net atomic charges, global and local hardness, global and local softness and Fukui functions. With these results and the analysis of the dipole moment and the total electron density and electrostatic potential maps, several conclusions have been inferred about the preferred sites of chemical reaction of the studied compounds. (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000171335000018 L2 - 1,2,5-thiadiazole 1,1-dioxide derivatives;ab initio MO calculations;single-crystal X-ray diffraction;DFT;sensitivity analysis;DENSITY-FUNCTIONAL THEORY; SOFT ACIDS; CHEMICAL-REACTIVITY; CRYSTAL-STRUCTURE; GAS-PHASE; HARDNESS; BASES; ELECTROREDUCTION; ELECTROCHEMISTRY; DESCRIPTORS SO - Journal of Molecular Structure 2001 ;597(1-3):163-175 2558 UI - 13883 AU - Castellano EE AU - Piro OE AU - Caram JA AU - Mirifico MV AU - Aimone SL AU - Vasini EJ AU - Lucero AM AU - Mitnik DG AD - CIMAV, Chihuahua, MexicoUniv Sao Paulo, Dept Fis, Inst Fis & Quim Sao Carlos, BR-13560 Sao Carlos, SP, BrazilNatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaCONICET, PROFIMO, RA-1900 La Plata, ArgentinaUniv Nacl La Plata, INIFTA, CONICET, RA-1900 La Plata, ArgentinaMitnik, DG, CIMAV, Miguel de Cervantes 120, Chihuahua, Mexico TI - Crystallographic study and molecular orbital calculations of thiadiazole derivatives. 1. Phenanthro[9,10-c]-1,2,5-thiadiazole 1,1-dioxide and acenaphtho[1,2-c]-1,2,5-thiadiazole 1,1-dioxide AB - Single-crystal X-ray diffraction studies are reported for phenanthro[9,10-c]-1,2,5-thiadiazole 1,1-dioxide (I) and acenaphtho[1,2-c]-1,2,5-thiadiazole 1,1-dioxide (II), Ab initio molecular orbital (MO) calculations on the electronic structure, conformation and reactivity of I and II an also reported and compared with the X-ray results. A charge sensitivity analysis of the studied molecules has been performed by resorting to density functional theory (DFT), obtaining several sensitivity coefficients such as the molecular energy, net atomic charges, global and local hardness, global and local softness and Fukui functions. With these results and the analysis of the dipole moments and the total electron density maps, several conclusions have been inferred about the preferred sites of chemical reaction of the studied compounds. (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000168080900017 L2 - 1,2,5-thiadiazole 1,1-dioxide derivatives;ab initio MO calculations;single-crystal X-ray diffraction;density functional theory;sensitivity analysis;DENSITY-FUNCTIONAL THEORY; 3,4-DIPHENYL-1,2,5-THIADIAZOLE 1,1-DIOXIDE; CHEMICAL-REACTIVITY; SOFT ACIDS; CRYSTAL-STRUCTURE; GAS-PHASE; HARDNESS; BASES; ELECTROREDUCTION; DESCRIPTORS SO - Journal of Molecular Structure 2001 ;562(1-3):157-166 2559 UI - 10578 AU - Castellanos-Guzman AG AU - Czank M AU - Kumar A AU - Singh G AU - Tiwari VS AU - Wadhawan VK AD - CUCEL, DIP, Lab Invest Mat, Guadalajara 44281, Jalisco, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCtr Adv Technol, Laser Mat Div, Indore 452013, IndiaCastellanos-Guzman, AG, CUCEL, DIP, Lab Invest Mat, Univ Apdo Postal 2-638, Guadalajara 44281, Jalisco, Mexico TI - Calorimetric, optical and electron microscopy studies of Co3B7O13Cl ferroic boracite AB - Results of our investigations of the fully ferroelectric-fully ferroelastic domain structure in Co3B7O13Cl single crystals by means of polarized-light and electron microscopy are reported. The isobaric heat capacity as well as the dielectric permittivity of this boracite have also been measured in the temperature range from 300 K up to 650 K MH - Germany MH - India MH - Mexico|Jalisco PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000177213400009 L2 - boracites;ferroelectricity;ferroelasticity;domains;heat capacity SO - Ferroelectrics 2001 ;251(1-4):61-68 2560 UI - 13472 AU - Castellanos J AU - Jaramillo VJ AU - Sanford RL AU - Kauffman JB AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoUniv Denver, Dept Biol Sci, Denver, CO 80208, USAOregon State Univ, Dept Fisheries & Wildlife, Corvallis, OR 97331, USAJaramillo, VJ, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Campus Morelia,AP 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Slash-and-burn effects on fine root biomass and productivity in a tropical dry forest ecosystem in Mexico AB - We examined the effects of slash-and-bum of a tropical dry forest (TDF) and pasture establishment on fine root (less than or equal to1 mm) biomass and productivity, We also determined the seasonal changes of fine roots, The study was conducted in the coast of Jalisco, Mexico where the dominant vegetation is tropical dry forest. Two 33 m x 100 m experimental plots with undisturbed TDF were slashed-and-burned by local farmers. Two adjacent plots with TDF were established as control sites. After slash-and-burning of the experimental plots, these were seeded with three pasture grasses along with two local maize varieties, Root sampling was initiated in March 1993 and roots were collected monthly until February 1994. Eight soil samples were collected randomly in each plot at each sampling date to a depth of 10 cm with a soil corer. Each soil core was divided in three depths: 0-2, 2.1-5, and 5-10 cm. Roots were separated in two size categories: fine (less than or equal to1.0 mm) and small(1.1-5 mm). Fine roots were separated into live and dead, Productivity of fine roots for each depth was estimated from the biomass data, Live fine root biomass in the 0-10 cm profile decreased due to burning but 47% of the fine root mass loss was at the 0-2 cm depth. Dead fine root biomass diminished significantly only at this depth. Total fine root productivity and mortality was 42-45% higher in TDF than in pasture in the first 5 cm of soil. About 86 and 76% of the fine root productivity in TDF and pasture, respectively, occurred in the first 5 cm of soil. Fine root turnover rates were high and similar in both ecosystems, Live fine root biomass in TDF and pasture increased in response to rainfall, particularly in the first 5 cm of soil. Mean annual live fine root biomass was significantly greater in TDF than in pasture: only at the 0-2 cm depth. Mean biomass per cm of soil was greater in the first 2 cm of the profile in both TDF and pasture and it represented one-third of the fine root biomass in the 0-10 cm profile. There were no significant differences of small roots (1.1-5.0 mm in diameter) due to treatment, seasonality or dynamics, Based on root Turnover and root production, our results indicate that the relative importance of belowground processes for C supply to the soil in this TDF is greater than the aboveground return.:(C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000169328200004 L2 - slash-and-burn;fine roots;tropical dry forest;root biomass;root productivity;Mexico;BELOWGROUND CARBON ALLOCATION; DECIDUOUS FOREST; NUTRIENT AVAILABILITY; SOIL-PHOSPHORUS; DYNAMICS; NITROGEN; GROWTH; PROLIFERATION; HETEROGENEITY; SEASONALITY SO - Forest Ecology and Management 2001 ;148(1-3):41-50 2561 UI - 13233 AU - Castellanos JZ AU - Villalobos S AU - Delgado JA AU - Munoz-Ramos J AU - Sosa A AU - Vargas P AU - Lazcano I AU - varez-Sanchez E AU - Enriquez SA AD - Inst Nacl Invest Forestales & Agropecuarias, Celaya 38000, Gto, MexicoUSDA ARS, Soil Plant Nutrient Res Unit, Ft Collins, CO 80522, USAPPI PPIC, Off Mexico & Cent Amer, Queretaro 76000, Qro, MexicoUniv Autonoma Chapingo, Chapingo, Edo, MexicoInst Tecnol Monterrery, Queretaro, Qro, MexicoCastellanos, JZ, Inst Nacl Invest Forestales & Agropecuarias, Ap Postal 112, Celaya 38000, Gto, Mexico TI - Use of best management practices to increase nitrogen use efficiency and protect environmental quality in a broccoli-corn rotation of Central Mexico AB - Underground water reserves in Central Mexico have been declining and NO3--N concentrations of some irrigation wells have been found to exceed 10 ppm. There is the need to develop best management practices (BMPs) that can increase N and water use efficiency by vegetables such as broccoli (Brassica oleracea L. Italica Group) in this region. Three field experiments were conducted during 1996 through 1998 at the Experimental Station of INIFAP in Celaya, Gto., Mexico to develop BMPs for the region. To determine the N sufficiency levels in the most recently fully expanded leaf (MRFEL), dry midrib and press sap were analyzed for total N and NO3--N. Maximum marketable yields of 24.5 to 27.0 ton ha(-1) were attained with rates of 400 to 425 kg N ha(-1). Sufficiency levels for N in the MRFEL were in the ran-e of 5.5 to 6.59o at the be-inning of the season, and then it was reduced to 5.5 to 6.0% at heading and then to 4.0-5.0% during the preharvest stage. The critical NO3--N concentration in the midrib ranged from 15,000 to 20,000 mg kg(-1) at the beginning of the season to 3,500-5,000 mg kg(-1) for the pre-harvest stage of development. The adequate levels of NO3--N in press sap ranged from 1,600-2,000 mg L-1 at the beginning of the season to 500-800 mg L-1 during pre-harvest growth stage. Broccoli fertilized with 400 ka N ha(-1) provided residual effects in the following crop of maize (Zea mays L.), equivalent to 60% of that produced with N fertilizer. This study shows that drip irrigation, spoon feeding of N, monitoring of N status during the growing season and crop rotations with grains has the potential to increase the N fertilizer use efficiency for vegetables-grain cropping systems and contribute to protecting environmental quality in Central Mexico MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato MH - Mexico|Queretaro MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Plant Sciences;Chemistry, Analytical;Soil Science U5 - J;Article AV - English IS - 0010-3624 UR - ISI:000170101800016 L2 - TRICKLE-IRRIGATED TOMATOES; WATER INTERACTIONS; LEAF LETTUCE; SUBSURFACE; NITRATE; RATES; FERTILIZATION; SPRINKLER; YIELD SO - Communications in Soil Science and Plant Analysis 2001 ;32(7-8):1265-1292 2562 UI - 12704 AU - Castello J AU - Carballo JL AD - Univ Barcelona, Dept Didact Ciencies Expt & Mat, Barcelona 08035, SpainUNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Mazatlan 82000, MexicoCastello, J, Univ Barcelona, Dept Didact Ciencies Expt & Mat, Passeig Vall Hebron 171, Barcelona 08035, Spain TI - Isopod fauna, excluding Epicaridea, from the Strait of Gibraltar and nearby areas (Southern Iberian Peninsula) AB - A total of 42 isopod species from the Strait of Gibraltar and nearby areas were found, including the first record of Munna fabricii, Monodanthura maroccana, Campecopea hirsuta, and Natatolana gallica from the Mediterranean; Synisoma nadejda and Uromunna petiti from the Atlantic; and Munna fabricii, Uromunna petiti, Monodanthura maroccana, Stellanthura cryptobia and Natatolana gallica from the Iberian waters. This article includes the previous records from the Iberian waters for all the species. The greatest number of species were found in Tarifa (16 species), located in the transition zone between the Atlantic Ocean and the Mediterranean Sea. According to depth, the distribution of species was as follows: 18 species were collected in the intertidal zone, mostly Dynamene edwardsi and Ischyromene lacazei; 33 species were found between 1 and 10 in, 13 species were found between 11 and 20 m, and 6 species were found between 21 and 28 in, mostly Janira maculosa. According to habitat, 16 species were collected on soft bottoms, 2 species on Zostera, and 22 species on algae substrata, mostly Halopteris, Asparagopsis and Cystoseira. The most diverse genus was Cymodoce (5 species). This paper contributes to the taxonomic, faunistic and biogeographical knowledge of the benthic communities from the Strait of Gibraltar and nearby areas MH - Mexico|Sinaloa MH - Spain PB - BARCELONA: INST CIENCIAS MAR BARCELONA RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Review AV - English IS - 0214-8358 UR - ISI:000171361200007 L2 - Crustacea;Isopoda;taxonomy;biogeography;Strait of Gibraltar;INTERTIDAL ISOPODS; SUPRABENTHIC COMMUNITIES; NORTHWEST SPAIN; NORTHERN SPAIN; ARCTURIDAE; ATLANTIC; RIA; CRUSTACEA; BAY; ASSEMBLAGES SO - Scientia Marina 2001 ;65(3):221-241 2563 UI - 14014 AU - Castellote M AU - Alonso C AU - Andrade C AU - Castro P AU - Echeverria M AD - CSIC, Inst Eduardo Torroja Ciencias Construcc, Madrid 28033, SpainIPN, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoCastellote, M, CSIC, Inst Eduardo Torroja Ciencias Construcc, C Serrano Galvache S-N, Madrid 28033, Spain TI - Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials AB - The need of determining "free" chloride content in the aqueous phase of hardened cementitious materials arises from the fact that chloride is the responsible agent of the depassivation of the rebars in reinforced concrete. This paper presents a method of obtaining free chlorides by leaching in an alkaline solution during 24 h. The method is calibrated by comparison with the values obtained by means of the pore-pressing technique (PPT). The agreement found is reasonably good in spite of the risk of excessive leaching that aims to solve part of bound chlorides. The use of decarbonated water as extraction agent has resulted appropriately, perhaps due to the fact that the samples are not powdered, instead, pieces of around 2 mm in size are used. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Yucatan MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-8846 UR - ISI:000167901600010 L2 - soluble chloride;analysis;leaching;pore solution;CONCRETE SO - Cement and Concrete Research 2001 ;31(2):233-238 2564 UI - 13194 AU - Castets A AU - Ceccarelli C AU - Loinard L AU - Caux E AU - Lefloch B AD - Observ Bordeaux, F-33270 Florac, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble 09, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUPS, CNRS, CESR, F-31028 Toulouse 04, FranceCastets, A, Observ Bordeaux, BP 89, F-33270 Florac, France TI - Multiple shocks around the low-luminosity protostar IRAS 16293-2422 AB - Using the IRAM 30 m and SEST 15 m telescopes we mapped an area covering 300 " x 220 " around IRAS 16293-2422 in the N2H+ J = 1 -->0, H2CO J = 3(1,3) --> 2(1,2), SiO J = 2 --> 1 J = 3 --> 2 and J = 5 --> 4 molecular transitions. Five positions were also observed in the FIR, between 45 mum and 200 mum, with the Long Wavelength Spectrometer on board ISO, revealing only [C II] 158 mum and[O I] 63 mum emission. All these observations are used to reconstruct the complex morphology of the region, in which several outflows from several sources co-exist. The N2H+ line emission is strong and centered on 16293E, a recently discovered low mass and very young protostar situated South-East of IRAS 16293-2422. Only weaker N2H+ line emission is associated with the binary system IRAS 16293-2422, presumably because the gas surrounding it is warmer. In addition to the previously known North-East-South-West outflow powered by IRAS 16293-2422, we suggest the existence of a second out ow in this binary system. We also report the discovery of a North-West-South-East flow driven by 16293E. The impact of the outflows with the ambient cloud is probed by the SiO and H2CO maps, which reveal the presence of at least four, possibly six shocked regions. We discuss in some detail the nature of the shocks, deriving densities, temperatures and column densities of the shocked gas of the various observed components. We suggest that the wind and ambient shocks are probed by the high and low velocity components observed in the SiO lines. The morphology of the H2CO, SiO and [O I] line emissions are rather different, showing almost all kind of combinations. We discuss the origin of these differences in terms of the age of the shocks, the pre-shock densities and of the composition of the ices which are partially desorbed by the shocks MH - France MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000170216000010 L2 - ISM : abundances;ISM : individual : IRAS 16293-2422;ISM : molecules;stars : formation;LONG-WAVELENGTH SPECTROMETER; STAR-FORMING REGIONS; MOLECULAR ABUNDANCES; IRAS-16293-2422; CHEMISTRY; EMISSION; OUTFLOW; CLOUDS; N2H+; SPECTROSCOPY SO - Astronomy & Astrophysics 2001 ;375(1):40-53 2565 UI - 11743 AU - Castilla JC AU - Defeo O AD - Pontificia Univ Catolica Chile, Fac Ciencias Biol, Dept Ecol, Santiago, ChileIPN, CINVESTAV, Lab Biol Pesquera, Merida 97310, Yucatan, MexicoUniv Republica, Fac Ciencias, UNDECIMAR PEDECIBA, Montevideo 11400, UruguayCastilla, JC, Pontificia Univ Catolica Chile, Fac Ciencias Biol, Dept Ecol, Casilla 114-D, Santiago, Chile TI - Latin American benthic shellfisheries: emphasis on co-management and experimental practices AB - In Latin America the small-scale fishery of marine benthic invertebrates is based on high-value species. It represents a source of food and employment and generates important incomes to fishers and, in some cases, export earnings for the countries. In the review, we define 2 key concepts: small-scale fishery and co-management. We address the temporal extractive phases which Latin American shellfish resources have experienced, and the corresponding socio-economic and managerial scenarios. We include 3 study cases in which co-management and field experimentation have been used on different temporal and spatial scales: (a) the muricid gastropod (Concholepas concholepas) in Chile; (b) the yellow clam (Mesodesma mactroides) in Uruguay; and (c) the spiny lobster (Panulirus argus) in Mexico. We demonstrate that co-management constitutes an effective institutional arrangement by which fishers, scientists and managers interact to improve the quality of the regulatory process and may serve to sustain Latin American shellfisheries over time. The main factors supporting co-management are: (a) a comparatively reduced scale of fishing operations and well-defined boundaries for the management unit; (b) the allocation of institutionalized co-ownership authority to fishers; (c) the voluntary participation of the fishers in enforcing regulations; (d) the improvement of scientific information (including data from fishers) to consolidate the management schemes; (e) the incorporation of community traditions and idiosyncrasies; and (f) the allocation of territorial use rights for fisheries under a collaborative/voluntary community framework. Chile is identified as an example in which basic ecological and fishery concepts have been institutionalized through management practices and incorporated into the Law. Several factors have precluded shellfishery management success in most of the Latin American countries: (a) the social and political instability, (b) the underestimation of the role of fisheries science in management advice, (c) the inadequacy of data collection and information systems, (d) the poor implementation and enforcement of management practices and (e) the uncertainty in short-term economic issues. In the review, we also show that in Latin America, large-scale fishery experiments are starting to play an important role in the evaluation of alternative management policies on benthic shellfisheries, especially when accompanied by co-management approaches that explicitly involve the participation of fishers. Fisher exclusion experiments have demonstrated changes in unexploited versus exploited benthic shellfish populations and in the structure and functioning of communities. The information has been used by scientists to approach system elasticity. Ecological and fishery related knowledge has been translated into novel co-managerial strategies. The sedentary nature of the shellfish species analyzed in this review allowed localized experiments with different levels of stock abundance and fishing intensity (e.g., marine reserves or maritime concessions versus open access areas). This includes the establishment of closed seasons as de facto management experiments, which proved useful in evaluating the capacity of passive restocking of depleted areas and for the quantification of population demographic features. The precise location of fishing grounds provided reliable area-specific estimates of population density and structure, catch, and fishing effort. This allowed the allocation of catch quotas in each fishing ground. We also discuss the reliability and applicability of spatially explicit management tools. Marine Protected Areas (MPAs) and Territorial User Rights in Fisheries (TURFs) fulfilled objectives for management and conservation and served as experimentation tools. The examples provided in our review include a comparative synthesis of the relative usefulness of alternative spatially explicit management tools under a framework of management redundancy. The cross-linkage between fishery experimental management protocols and the active participation of fishers is suggested as the strategy to be followed to improve the sustainable management of small-scale shellfisheries in Latin America. Finally, we discuss the future needs, challenges and issues that need to be addressed to improve the management status of the small-scale shellfisheries in Latin America, and, in general, around the world. We conclude that for the sustainability of shellfish resources there is an urgent need to look for linkages between sociology, biology and economics under an integrated management framework. Fishers, and not the shellfish, must be in the center of such a framework MH - Chile MH - Mexico|Yucatan MH - Uruguay PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 54 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Review AV - English IS - 0960-3166 UR - ISI:000173992300001 L2 - benthic shellfishes;co-management;experiments;Latin America;SANDY BEACH POPULATIONS; LOBSTER PANULIRUS-ARGUS; CLAM MESODESMA-MACTROIDES; MARINE RESERVES; CENTRAL CHILE; FISHERIES MANAGEMENT; HUMAN-EXCLUSION; INTERTIDAL ZONE; CONSERVATION; COMANAGEMENT SO - Reviews in Fish Biology and Fisheries 2001 ;11(1):1-30 2566 UI - 14008 AU - Castillejos V AU - Garcia L AU - Cisneros J AU - Goulson D AU - Cave RD AU - Caballero P AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoUniv Southampton, Dept Biol, Southampton SO16 7PX, Hants, EnglandEscuela Agr Panamer, El Zamorano, HondurasUniv Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainWilliams, T, ECOSUR, Tapachula 30700, Chiapas, Mexico TI - The potential of Chrysoperla rufilabris and Doru taeniatum as agents for dispersal of Spodoptera frugiperda nucleopolyhedrovirus in maize AB - The behaviour of two abundant predators in Mesoamerican maize crops, Chrysoperla rufilabris larvae and Doru taeniatum adults, towards healthy and nucleopolyhedrovirus-infected Spodoptera frugiperda larvae was compared. C. rufilabris did not discriminate between healthy and virus-infected prey, although the mean search time was approximately two times longer towards virus-infected larvae. In contrast, D. taeniatum directed a greater proportion of their attacks towards virus-infected prey but there was no significant difference in the search time. Prey consumption time did not differ significantly for each type of prey by either predator, although prey consumption was much faster in D. taeniatum. Viable virus was detected in D. taeniatum faeces up to 3 d after feeding on infected S. frugiperda larvae, whereas virus was inactivated in the gut of C. rufilabris. Both predators were shown to have acidic guts. A field experiment demonstrated that D. taeniatum that had fed on infected prey could contaminate foliage resulting in the transmission of the disease at a low prevalence (4.7%) to S. frugiperda larvae in a field maize crop MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0013-8703 UR - ISI:000167852200012 L2 - search time;prey consumption;Neuroptera;Dermaptera;Lepidoptera;baculovirus;virus dispersal;NUCLEAR POLYHEDROSIS-VIRUS; ANTICARSIA-GEMMATALIS LEPIDOPTERA; FALL ARMYWORM; PODISUS-MACULIVENTRIS; APANTELES-GLOMERATUS; NOCTUIDAE LARVAE; GRANULOSIS-VIRUS; BACULOVIRUS; TRANSMISSION; HEMIPTERA SO - Entomologia Experimentalis et Applicata 2001 ;98(3):353-359 2567 UI - 11991 AU - Castillo-Mejia F AU - Milanese MM AU - Moroso RL AU - Pouzo JO AU - Santiago MA AD - Natl Autonomous Univ Mexico, Inst Nucl Sci, Mexico City 04510, DF, MexicoCtr Buenos Aires Prov Univ, Fac Sci, Inst Phys Arroyo Secco, Tandil, ArgentinaCNR, Tandil, ArgentinaCastillo-Mejia, F, Natl Autonomous Univ Mexico, Inst Nucl Sci, Mexico City 04510, DF, Mexico TI - Small plasma focus studied as a source of hard X-ray AB - An experimental study on hard X-ray pulses emitted by a small plasma focus is performed, regarding its application to biological radiographs in fast dynamic situations. It is found that the radiation intensity in a single shot is high enough to obtain fine resolution radiographs in very short exposures (about 10 ns). As an example, a radiograph on a live mouse is shown. It is found that the relation between responses of different detectors, i.e., thermoluminiscence dosimeters and scintillator-photomultiplier, is linear MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0093-3813 UR - ISI:000173337800009 L2 - plasma focus;radiography;X-ray sources;EMISSION SO - Ieee Transactions on Plasma Science 2001 ;29(6):921-926 2568 UI - 14029 AU - Castillo I AU - Barnes ER AD - Inst Tecnol & Estudios Super Monterrey, Dept Ind Engn, Toluca, MexicoGeorgia Inst Technol, Sch Ind & Syst Engn, Atlanta, GA 30332, USACastillo, I, Inst Tecnol & Estudios Super Monterrey, Dept Ind Engn, Toluca, Mexico TI - Chaotic behavior of the affine scaling algorithm for linear programming AB - The affine scaling algorithm for linear programming involves a step-size parameter t that must be chosen in the interval (0,1). It is known that the algorithm converges to an optimal solution for values of t less than or equal to2/3. In this paper we examine the behavior of the algorithm for values of t> 2/3. We show that for certain values of t in this range the algorithm can exhibit chaotic behavior MH - Mexico|Estado De Mexico MH - USA PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1052-6234 UR - ISI:000167675100010 L2 - affine scaling;step-size parameter;chaos;CUTTING PLANE METHOD; GLOBAL CONVERGENCE SO - Siam Journal on Optimization 2001 ;11(3):781-795 2569 UI - 13829 AU - Castillo SJ AU - Sotelo-Lerma M AU - Zingaro RA AU - Ramirez-Bon R AU - Espinoza-Beltran FJ AU - Guillemette R AU - Dominguez MA AD - Texas A&M Univ, Dept Chem, College Stn, TX 77843, USASonoma State Univ, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoSonoma State Univ, Dept Fis, Hermosillo 83000, Sonora, MexicoSonoma State Univ, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoIPN, CINVESTAV, Lab Invest Mat, Queretaro 76001, Qro, MexicoTexas A&M Univ, Dept Geol, College Stn, TX 77843, USACastillo, SJ, Texas A&M Univ, Dept Chem, College Stn, TX 77843, USA TI - ZnO/CdS bilayers prepared by concurrent deposition from a chemical bath AB - ZnO/CdS bilayer films have been prepared by the chemical bath deposition (CBD) technique from a single reaction bath. The bilayer films were obtained by using solution concentrations of 1 M for ZnSO4 and 0.1 M for CdCl2. The pH was adjusted by the use of an ethanolamine-ammonia system. A solution 1 M of thiourea was used as the source of sulfur ions. The thickness of each layer in the resultant film were 2 and 0.3 mum for ZnO and CdS, respectively. We report here the optical and structural characterization of this ZnO/CdS bilayer system. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - Mexico|Sonora MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000168343500008 L2 - semiconductors;ZNS THIN-FILMS SO - Journal of Physics and Chemistry of Solids 2001 ;62(6):1069-1073 2570 UI - 11997 AU - Castro-Longoria E AU - varez-Borrego J AU - Pech-Pacheco JL AD - Dept Opt, Div Fis Aplicada, Ctr Invest Cientifica & Educ Super Ensenada, Ensenada, Baja California, MexicoCSIC, Inst Opt, Dept Omagen & Vis, E-28006 Madrid, SpainCastro-Longoria, E, Dept Opt, Div Fis Aplicada, Ctr Invest Cientifica & Educ Super Ensenada, Km 107 Carretera Tijuana Ensenada, Ensenada, Baja California, Mexico TI - Identification of species of calanoid copepods using a new invariant correlation algorithm AB - Digital images of Calanus pacificus, Rhincalanus nasutus, Pleuromamma gracilis, Temora discaudata. and Acartia tonsa were processed to obtain their diffraction pattern. For this analysis an algorithm using the square module of the fast Fourier transform was used. The diffraction patterns of these copepod species were correlated with phase-only filters in an invariant way to discriminate between each species and sex. Results indicate that this method is promising and that in a relatively short time an automated system for plankton identification could be developed MH - Mexico|Baja California MH - Spain PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000173222800003 L2 - ZOOPLANKTON; RECOGNITION SO - Crustaceana 2001 ;74():1029-1039 2571 UI - 13770 AU - Castro-Longoria E AD - Univ Southampton, Southampton Oceanog Ctr, Sch Ocean & Earth Sci, Southampton SO14 3ZH, Hants, EnglandCastro-Longoria, E, Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Dept Opt, Km 107 Carretera Tijuana Ensenada, Ensenada, Baja California, Mexico TI - Comparative observations on the external morphology of subitaneous and diapause eggs of Acartia species from Southampton water AB - Eggs produced by four Acartia species from the Solent-Southampton Water estuarine system were examined. Acartia tonsa produced two morphologically distinct types of eggs, which were identified as subitaneous and diapause. Diapause eggs from this species were spiny while the subitaneous form had a relatively smooth chorion surface; a second subitaneous egg was produced by A. tonsa, which had significant spine extensions on the surface. Acartia margalefi, A. discaudata, and A. clausi produced only smooth eggs, which were identified as subitaneous. Observations under scanning electron microscopy (SEM) revealed consistent interspecific variations in the texture of the chorion surface of both subitaneous and diapause eggs in all species MH - United Kingdom MH - Mexico|Baja California PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 7 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000168529000001 L2 - CALANOID COPEPOD EGGS; SEA-BOTTOM MUDS; RESTING EGGS; ANOSTRACANS CRUSTACEA; SEDIMENTS; BRANCHIOPODA; POPULATIONS; ABUNDANCE; UK SO - Crustaceana 2001 ;74():225-236 2572 UI - 13614 AU - Castro B AU - Whitcombe MJ AU - Vulfson EN AU - Vazquez-Duhalt R AU - Barzana E AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoInst Mexicano Petr, Programa Biotecnol Petr, Mexico City 07730, DF, MexicoInst Food Res, Norwich NR4 7UA, Norfolk, EnglandUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoBarzana, E, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - Molecular imprinting for the selective adsorption of organosulphur compounds present in fuels AB - A novel approach to the potential desulphurisation of fuels such as diesel is proposed. It relies on the creation of recognition sites complementary to sulphur-containing compounds in highly cross-linked polymeric matrices using the molecular imprinting technique. Dibenzothiophene sulphone (DBTS) was used as template for the preparation of molecularly imprinted polymers (MIPs). Four different polymers were synthesised using 5-octyloxy-1,3-bis(4-ethenylphenyl)-benzenedicarboxamide or methacrylic acid and divinylbenzenes or ethylene glycol dimethacrylate as functional monomers and cross-linkers, respectively. Three polymers showed better binding of DBTS than non-imprinted controls, and were also superior in adsorption of organosulphur compounds such as dibenzothiophene (DBT) and benzothiophene (BT) present in a model mixture. A maximum adsorption of 66 mg DBT per gram of polymer was observed at a polymer load of 10 gl(-1) and an initial DBT concentration of 3.69 gl(-1). The polymers also showed selectivity for fluorene. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2670 UR - ISI:000168879000012 L2 - desulphurisation;dibenzothiophene;organosulphur compounds;molecular imprinting;molecularly imprinted polymers;solid-phase extraction;SOLID-PHASE EXTRACTION; MEDIATED LITHOGRAPHY; POLYMER SURFACES; RECOGNITION; SEPARATION; OXIDATION; PROTEINS; BIODESULFURIZATION; ANTIBODIES; TECHNOLOGY SO - Analytica Chimica Acta 2001 ;435(1):83-90 2573 UI - 12248 AU - Castro GL AU - Sanchez GT AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoFlorida State Univ, Dept Phys, Tallahassee, FL 32306, USACastro, GL, Inst Politecn Nacl, CINVESTAV, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Beyond the soft photon approximation in radiative production and decay of charged vector mesons AB - We study the effects of model-dependent contributions and the electric quadrupole moment of vector mesons in the decays V- --> P(-)P(0)gamma and tau (-) --> nuW(-)gamma. Their interference with the amplitude originating from the radiation due to electric charges vanishes for photons emitted collinearly to the charged particle in the final state. This brings further support to our claim in previous works, that measurements of the photon energy spectrum for nearly collinear photons in those decays are suitable for a first measurement of the magnetic dipole moment of charged vector mesons MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0954-3899 UR - ISI:000172539200003 L2 - ELECTROMAGNETIC FORM-FACTORS; MAGNETIC DIPOLE-MOMENT SO - Journal of Physics G-Nuclear and Particle Physics 2001 ;27(11):2203-2210 2574 UI - 12634 AU - Castro GL AU - Mariano A AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoNatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaCastro, GL, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 17-740, Mexico City 07000, DF, Mexico TI - Determination of the Delta(++) magnetic dipole moment AB - We study the elastic and radiative pi (+)p scattering within a full dynamical model which incorporates the finite width effects of the Delta (++). The scattering amplitudes are invariant under contact transformations of the spin 3/2 field and gauge-invariance is fulfilled for the radiative case. The pole parameters of the Delta (++) obtained from the elastic cross section are m(Delta) = (1211.2 +/- 0.4) MeV and Gamma (Delta) = (88.2 +/- 0.4) MeV. From a fit to the most sensitive observables in radiative Delta (++) scattering, we obtain mu (Delta) = (6.14 +/- 0.51)e/2m(p) for the magnetic dipole moment of the Delta (++). (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171479800013 L2 - PION-PROTON BREMSSTRAHLUNG; DIFFERENTIAL CROSS-SECTIONS; RADIATIVE PI+P SCATTERING; GAUGE-INVARIANCE; Z(0) RESONANCE; WIDTH; DELTA++(1232); DECAY; MASS SO - Physics Letters B 2001 ;517(3-4):339-344 2575 UI - 13776 AU - Castro P AU - de Rincon OT AU - Pazini EJ AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97320, Yucatan, MexicoUniv Zulia, Ctr Estudios Corros, Maracaibo 4011, VenezuelaUniv Fed Goias, Escola Engn Civil, Goiania, Go, BrazilCastro, P, IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Km 6 Antiqua Carretera Progreso, Merida 97320, Yucatan, Mexico TI - Interpretation of chloride profiles from concrete exposed to tropical marine environments AB - The chlorides from the sea and marine breeze are the main source for corrosion in marine environments, and their profiles in concrete are commonly modeled and used for prediction purposes. However, no reliable results may be obtained if the action of environmental agents, such as the relative humidity (RH), temperature, winds, rains and drying periods, on such profiles are not well known through several periods of time. Although these limitations are recognized in several works, there are very few field and isolated data in the literature to explain and support, according to different exposure conditions and periods of time, the shape and meaning of the chloride profiles. Any prediction model could acquire more reliability only after knowing and incorporating such information. This work presents concentration profiles, which were obtained from concretes exposed to different microclimates, and discusses their behavior and meaning according to the environmental parameters, concrete duality and several periods of time. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Brazil MH - Mexico|Yucatan MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-8846 UR - ISI:000168499600002 L2 - chloride;concentration profile;concrete;corrosion;tropical marine environment;REINFORCED-CONCRETE; PENETRATION; DIFFUSION; BRIDGE; MODEL; WATER SO - Cement and Concrete Research 2001 ;31(4):529-537 2576 UI - 14070 AU - Castro RR AU - Rovelli A AU - Cocco M AU - Di Bona M AU - Pacor F AD - CICESE, Div Ciencias Tierra, Dept Sismol, Ensenada 22860, Baja California, MexicoInst Nazl Geofis, I-00143 Rome, ItalyEnte Nazl Energia Elettr, ENEL, I-00100 Rome, ItalyCastro, RR, CICESE, Div Ciencias Tierra, Dept Sismol, Apartado Postal 2732, Ensenada 22860, Baja California, Mexico TI - Stochastic simulation of strong-motion records from the 26 September 1997 (M-w 6), Umbria-Marche (Central Italy) earthquake AB - We simulated the strong-motion time histories recorded during the main shock (M-w 6.0) of the Umbria-Marche seismic sequence (Central Italy) of September-October 1997. Ground-motion waveforms were computed using the stochastic modeling technique proposed by Beresnev and Atkinson (1997, 1998) for finite faults. In this approach, the high-frequency amplitudes are simulated as a summation of stochastic point sources. We used the FINSIM code (Beresnev and Atkinson, 1998), which incorporates regional attenuation and frequency-dependent site-amplification factors. We divided the fault plane into 60 elements whose length and width are 1.2 km and 1.5 km, respectively. The resulting subfault corner frequency and rise time are 0.91 Hz and 0.5 sec, We found that the site-amplification functions play an important role in the simulation process, improving the fit to the observed time histories and spectra, The strong-motion waveforms recorded at the Nocera (NOC) station, located at the northern end of the causative fault, show an important directivity effect, Thus, to fit the observed ground motions, we used an inhomogeneous slip distribution, weighting the slip on the fault heavier toward the north. We tested two models: one that: simulates a fault rupture with two main slip patches and a second model that ruptures northward with a less heterogeneous slip distribution where slip is mostly concentrated near the rupture nucleation at the southern edge of the fault plane. The simulated low-frequency amplitudes at NOC, however, require an additional frequency-dependent directivity correction (e.g., Bernard et al., 1996). In conclusion, we found that stochastic finite-fault simulations calculated using adequate site amplification functions and crustal attenuation reproduce reasonably well the ground motions from the M-w = 6.0 Umbria-Marche earthquake MH - Italy MH - Mexico|Baja California PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000167720600003 L2 - MODELING COSEISMIC DISPLACEMENTS; SAR INTERFEROMETRY; SEISMIC SEQUENCE; GROUND MOTION; FAULT; DIRECTIVITY; RUPTURES; SHOCKS; GPS SO - Bulletin of the Seismological Society of America 2001 ;91(1):27-39 2577 UI - 14072 AU - Castro T AU - Madronich S AU - Rivale S AU - Muhlia A AU - Mar B AD - Natl Autonomous Univ Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80307, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCastro, T, Natl Autonomous Univ Mexico, Ctr Ciencias Atmosfera, Circuito Exterior Cd Univ, Mexico City 04510, DF, Mexico TI - The influence of aerosols on photochemical smog in Mexico City AB - Aerosols in the Mexico City atmosphere can have a non-negligible effect on the ultraviolet radiation field and hence on the formation of photochemical smog. We used estimates of aerosol optical depths from sun photometer observations in a detailed radiative transfer model, to calculate photolysis rate coefficients (J(NO2)) for the key reaction NO2 + hv --> NO + O (lambda < 430 nm). The calculated values are in good agreement with previously published measurements of J(NO2) at two sites in Mexico City: Palacio de Mineria (19 25'59N, 99 07'58 "W, 3233masl), and IMP (19 degrees 28'48 "N, 99 degrees 11'07 "W, 2277masl) and in Tres Marias, a town near Mexico City (19 03'N, 99 14'W, 2810masl). In particular, the model reproduces very well the contrast between the two urban sites and the evidently much cleaner Tres Marias site. For the measurement days, reductions in surface J(NO2) by 10-30% could be attributed to the presence of aerosols, with considerable uncertainty due largely to lack of detailed data on aerosol optical properties at ultraviolet wavelengths (esp. the single scattering albedo). The potential impact of such large reductions in photolysis rates on surface ozone concentrations is illustrated with a simple zero-dimensional photochemical model, (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000167745600005 L2 - photolysis rates;aerosols optical properties;photochemical smog;Mexico City;PHOTOLYSIS RATES; RADIATION; OZONE; ATMOSPHERE; SENSITIVITY; MODEL; NO2 SO - Atmospheric Environment 2001 ;35(10):1765-1772 2578 UI - 12507 AU - Cataldo M AU - del Campo S AU - Garcia A AD - Univ Bio Bio, Fac Ciencias, Dept Fis, Concepcion, ChilePontificia Univ Catolica Valparaiso, Fac Ciencias Basicas & Matemat, Inst Fis, Valparaiso, ChileInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoCataldo, M, Univ Bio Bio, Fac Ciencias, Dept Fis, Avda Collao 1202,Casilla 5-C, Concepcion, Chile TI - BTZ black hole from (3+1) gravity AB - We propose an approach for constructing spatial slices of (3+1) spacetimes with cosmological constant but without a matter content, which yields (2+1) vacuum with A solutions. The reduction mechanism from (3+1) to (2+1) gravity is supported on a criterion in which the Weyl tensor components are required to vanish together with a dimensional reduction via an appropriate foliation. By using an adequate reduction mechanism from the Plebanski-Carter[A] solution in (3+1) gravity, the (2+1) BTZ solution can be obtained MH - Chile MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Letter AV - English IS - 0001-7701 UR - ISI:000171961400008 L2 - black holes in 2+1 and 3+1 SO - General Relativity and Gravitation 2001 ;33(7):1245-1255 2579 UI - 13246 AU - Catillo I AU - Jones ML AD - ITESM, San Antonio 50110, MexicoUniv Charleston, Dept Math, Charleston, SC 29424, USA TI - Stop rule and supremum comparisons for i.i.d. sequences of exponential and uniform random variables AB - Let X-1, X-2,..., X-n be a finite sequence of integrable random variables. The value of the sequence is defined by V-n = V(X1,..., X-n)= sup(tau) E(X-tau), where the supremum is over all stop rules tau. Denote by M-n = M(X1,..., X-n) the expected gain of an observer who is allowed recall and may choose the maximum of the sequence. In this paper we obtain sharp inequalities for the differences and ratios of M-n and V-n for i.i.d. sequences of exponential random variables and i.i.d. sequences of uniform [0, 1] random variables. For example, we show that for a sequence of i.i.d exponential random variables with parameter lambda the difference between M(X-1,..., X-n) and V(X-1,..., X-n) is no larger than lambda (-1) gamma, where gamma is Euler's constant MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Statistics & Probability U5 - J;Article AV - English IS - 0736-2994 UR - ISI:000169926400004 L2 - optimal stopping;inequalities for stochastic processes;prophet problems SO - Stochastic Analysis and Applications 2001 ;19(2):197-206 2580 UI - 12543 AU - Cauich-Rodriguez JV AU - Deb S AU - Smith R AD - Ctr Invest Cientif Yucatan AC, Merida, Yucatan, MexicoGuys Hosp, Guys Kings & St Thomas Dent Inst, Dept Dent Biomat, London SE1 9RT, EnglandUniv London Queen Mary & Westfield Coll, IRC Biomed Mat, London E1 4NS, EnglandCauich-Rodriguez, JV, Ctr Invest Cientif Yucatan AC, Apdo Postal 87,Cordemex 97310, Merida, Yucatan, Mexico TI - Physicochemical characterization of hydrogels based on polyvinyl alcohol-vinyl acetate blends AB - Hydrogels made of polyvinyl alcohol-vinyl acetate and its blends with water soluble polymer were studied in terms of swelling behavior, microstructure, and dynamic mechanical properties. Hydrogels prepared by blending polyvinyl alcohol-vinyl acetate with either polyacrylic acid or poly(4-vinyl pyridine) exhibited a strong pH dependency. When poly(vinyl pyrrolidone) was used for blending, an unusual pH dependency was observed. An increase in the equilibrium water content in all systems resulted in an increase in the freezable water as determined by DSC. Critical point drying led to a striated surface on polyacrylic acid-polyvinyl alcohol-vinyl acetate hydrogels, whereas a porous structure was observed on the freeze-dried poly(vinyl pyrrolidone)-polyvinyl alcohol-vinyl acetate gels. Hydrogels with elevated storage modulus were obtained when either polyvinyl alcohol-vinyl acetate alone or polyacrylic acid-polyvinyl alcohol-vinyl acetate blends were thermally treated at high temperatures (i.e., 150 degreesC). Low storage modulus was observed for both poly(vinyl pyrrolidone) and poly(4-vinyl pyridine)-containing hydrogels. Temperature dependency of storage modulus from 20 to 60 degreesC was observed only for poly(4-vinyl pyridine)-polyvinyl alcohol-vinyl acetate hydrogels. (C) 2001 John Wiley & Sons, Inc MH - United Kingdom MH - Mexico|Yucatan PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000171825800023 L2 - polyvinyl alcohol-vinyl acetate;polyacrylic acid;poly(vinyl pyrrolidone);poly(4-vinyl pyridine);hydrogels;POLY(VINYL ALCOHOL); WATER; ACID); PYRROLIDONE); MISCIBILITY; TEMPERATURE; DSC SO - Journal of Applied Polymer Science 2001 ;82(14):3578-3590 2581 UI - 13582 AU - Cavestany D AU - Galina CS AD - INIA La Estanzuela, Inst Nacl Invest Agropecuaria, Colonia 70000, UruguayUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoCavestany, D, INIA La Estanzuela, Inst Nacl Invest Agropecuaria, C Correos 39173, Colonia 70000, Uruguay TI - Evaluation of an artificial insemination programme in a seasonal breeding dairy system through milk progesterone MH - Mexico|Distrito Federal MH - Uruguay PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0936-6768 UR - ISI:000168992500005 L2 - REPRODUCTIVE-PERFORMANCE; COWS; ESTRUS; PREGNANCY; HERD; FERTILITY; MANAGEMENT; CONCEPTION; DIAGNOSIS; ASSAYS SO - Reproduction in Domestic Animals 2001 ;36(2):79-84 2582 UI - 13583 AU - Cavestany D AU - Galina CS AD - INIA La Estanzuela, Inst Nacl Invest Agropecuaria, Colonia 70000, UruguayUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoCavestany, D, INIA La Estanzuela, Inst Nacl Invest Agropecuaria, C Correos 39173, Colonia 70000, Uruguay TI - Factors affecting the reproductive efficiency of artificial insemination programmes in a seasonal breeding pasture-based dairy system with the aid of milk progesterone MH - Mexico|Distrito Federal MH - Uruguay PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0936-6768 UR - ISI:000168992500006 L2 - COWS; POSTPARTUM; PERFORMANCE; FERTILITY; ESTRUS; PERIOD; HERDS; YIELD SO - Reproduction in Domestic Animals 2001 ;36(2):85-89 2583 UI - 13292 AU - Ceccarelli C AU - Loinard L AU - Castets A AU - Tielens AGGM AU - Caux E AU - Lefloch B AU - Vastel C AD - Observ Bordeaux, F-33270 Florac, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble 09, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoSRON, NL-9700 AV Groningen, NetherlandsUPS, CNRS, CESAR, F-31028 Toulouse 04, FranceCeccarelli, C, Observ Bordeaux, BP 89, F-33270 Florac, France TI - Extended D2CO emission: The smoking gun of grain surface-chemistry AB - We present new observations of the H2CO and D2CO emission around IRAS16293-2422, a low mass protostar in the rho Ophiuchus complex. Bright H2CO and D2CO emission is detected up to 40" from the center, corresponding to a linear distance of similar to 5000 AU. The derived H2CO abundance profile has two jumps at tau less than or equal to 150 AU and r less than or equal to 700 AU, where the dust temperature reaches 100 K and 50 K respectively. The measured [D2CO]/[H2CO] abundance ratio in the envelope is between 0.03 and 0.16, an extremely high value. We demonstrate that the present new observations can only be explained if the D2CO (and H2CO) are formed during the previous cold pre-collapse phase, stored in the grain mantles, and released in the gas phase during the pre-collapse phase. We consider the two main competing theories for mantle formation, i.e. pure accretion against grain surface chemistry, and we conclude that the former theory cannot explain the present observations, whereas grain active chemistry very naturally does. We found that the mantles are evaporated because of the thermal heating of the grains by the central source and that in the outer cold envelope H2CO and D2CO molecules are embedded in CO-rich mantles which sublimate when the dust is warmer than 25 K. Finally, the present day H2CO and D2CO abundances very probably reflect the mantle composition. We argue that mantles have likely formed in an onion-like structure with the innermost ice layers more enriched in H2CO molecules and we give estimates of the CO hydrogenation efficiency across the envelope and/or in different ices MH - France MH - Mexico|Michoacan MH - Netherlands PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 43 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000169966600033 L2 - ISM : abundances;ISM : molecules;stars : formation;ISM : individual : IRAS 16293 2422;YOUNG STELLAR OBJECTS; MASS STAR-FORMATION; IRAS 16293-2422; PROTOSTAR IRAS-16293-2422; MOLECULAR CLOUDS; DEUTERIUM FRACTIONATION; CO; FORMALDEHYDE; ABUNDANCES; ENVELOPES SO - Astronomy & Astrophysics 2001 ;372(3):998-1004 2584 UI - 13537 AU - Cecenas-Falcon M AU - Edwards RM AD - Inst Invest Elect, Temixco 62490, Morelos, MexicoPenn State Univ, Dept Nucl Engn, University Pk, PA 16802, USACecenas-Falcon, M, Inst Invest Elect, Av Reforma 113 Col Palmira, Temixco 62490, Morelos, Mexico TI - Application of a reduced order model to BWR corewide stability analysis AB - The determination of system stability parameters from power readings is a problem usually solved by time series techniques such as autoregressive modeling. These techniques are capable of determining the system stability, but ignore the physics of the process and focus on the determination of a nth order linear model. A nonlinear reduced order system is used in conjunction with estimation techniques to present a different approach for stability determination. The simulation of the reduced order model shows the importance of the feedback reactivity imposed by the thermal-hydraulics; the dominant contribution to this feedback is provided by the void reactivity, being a function of power, burnup, power distribution, and in general of the operating conditions of the system. The feedback reactivity is estimated from power measurements and used in conjunction with a reduced order model to determine the system stability properties in terms of the decay ratio. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0306-4549 UR - ISI:000169200100005 SO - Annals of Nuclear Energy 2001 ;28(12):1219-1235 2585 UI - 13420 AU - Cedillo-Barron L AU - Foster-Cuevas M AU - Belsham GJ AU - Lefevre F AU - Parkhouse RME AD - AFRC, Inst Anim Hlth, Pirbright Lab, Woking GU24 0NF, Surrey, EnglandINRA, F-78350 Jouy En Josas, FranceCedillo-Barron, L, IPN, Ctr Invest & Estud Avanzados, Dept Biomed Mol, Av IPN,2508 Col Zacatenco, Mexico City 07360, DF, Mexico TI - Induction of a protective response in swine vaccinated with DNA encoding foot-and-mouth disease virus empty capsid proteins and the 3D RNA polymerase AB - This work focuses on the development of a potential recombinant DNA vaccine against foot-and-mouth disease virus (FMDV). Such a vaccine would have significant advantages over the conventional inactivated virus vaccine, in particular having none of the risks associated with the high security requirements for working with live virus. The principal aim of this strategy was to stimulate an antibody response to native, neutralizing epitopes of empty FMDV capsids generated in vivo. Thus, a plasmid (pcDNA3.1/P1 -2A3C3D) was constructed containing FMDV cDNA sequences encoding the viral structural protein precursor P1-2A and the non-structural proteins 3C and 3D. The 3C protein was included to ensure cleavage of the P1-2A precursor to VPO, VP1 and VP3, the components of self-assembling empty capsids, The non-structural protein 3D was also included in the construct in order to provide additional stimulation of CD4(+) T cells. When swine were immunized with this plasmid, antibodies to FMDV and the 3D polymerase were synthesized, Furthermore, neutralizing antibodies were detected and, after three sequential vaccinations with DNA, some of the animals were protected against challenge with live virus. Additional experiments suggested that the antibody response to FMDV proteins was improved by the co-administration of a plasmid encoding porcine granulocyte-macrophage colony-stimulating factor, Although still not as effective as the conventional virus vaccine, the results encourage further work towards the development of a DNA vaccine against FMDV MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 38 U4 - Biotechnology & Applied Microbiology;Virology U5 - J;Article AV - English IS - 0022-1317 UR - ISI:000169435800021 L2 - IMMUNE-RESPONSES; EXPRESSION SYSTEM; ANTIBODY-RESPONSE; T-CELLS; EPITOPES; PEPTIDE; PIGS; NEUTRALIZATION; RECOGNITION; SPECIFICITY SO - Journal of General Virology 2001 ;82():1713-1724 2586 UI - 14199 AU - Centurion D AU - Ortiz MI AU - Sanchez-Lopez A AU - De Vries P AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Univ, Fac Med & Hlth Sci, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacobiol, Calzada Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Evidence for 5-HT1B/1D and 5-HT2A receptors mediating constriction of the canine internal carotid circulation AB - 1 The present study has investigated the preliminary pharmacological profile of the receptors mediating vasoconstriction to 5-hydroxytryptamine (5-HT) in the internal carotid bed of vagosympathectomised dogs. 2 One minute intracarotid infusions of the agonists 5-HT (0.1-10 mug min(-1)), sumatriptan (0.3-10 mug min(-1); 5-HT1B/1D), 5-methoxytryptamine (1-100 mug min(-1) 5-HT1, 5-HT2, 5-HT4, 5-ht(6) and 5-HT7) or DOI (0.31-10 mug min(-1); 5-HT2), but not 5-carbaxamihotryptamine (0.01-0.3 mug min(-1); 5-HT1, 5-ht(5A) and 5-HT7), 1-(m-chlorophenyl)-biguanide (mCPBG; 1-1000 mug min(-1); 5-HT3) or cisapride (1-1000 mug min(-1); 5-HT4), resulted in dose-dependent decreases in internal carotid blood flow, without changing blood pressure or heart rate. 3 The vasoconstrictor responses to 5-MT, which remained unaffected after saline, were resistant to blockade by i.v. administration of the antagonists ritanserin (100 mug kg(-1); 5-HT2A/2B/2C) in combination with tropisetron (3000 mug kg(-1); 5-HT3/4) Or the cyclo-oxygenase inhibitor, indomethacin (5000 mug kg(-1)), but were abolished by the 5-HT1B/1D receptor antagonist, GR127935 (30 mug kg(-1)). Interestingly, after administration of GR127935, the subsequent administration of ritanserin unmasked a dose-dependent vasodilator component. GR127935 or saline did not practically modify the vasoconstrictor effects of 5-MeO-T. In animals receiving GR127935, the subsequent administration of ritanserin abolished the vasoconstrictor responses to 5-MeO-T unmasking a dose-dependent vasodilator component. 4 The vasoconstriction induced by sumatriptan was antagonized by GR127935, but not by ritanserin. Furthermore, ritanserin (100 mug kg(-1)) or ketanserin (100 mug kg(-1); 5-HT2A), but not GR127935, abolished DOI-induced vasoconstrictor responses. 5 The above results suggest that 5-HT-induced internal carotid vasoconstriction is predominantly mediated by 5-HT1B/1D and 5-HT2A receptors MH - Mexico|Distrito Federal MH - Netherlands PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000167241300003 L2 - 5-hydroxytryptamine (5-HT);internal carotid vasoconstriction;5-HT1B/1D receptors;5-HT2A receptors;ritanserin;ketanserin;GR127935;sumatriptan;VAGOSYMPATHECTOMIZED DOGS; 5-HT1-LIKE RECEPTORS; SEROTONIN RECEPTORS; VASOCONSTRICTION; 5-HYDROXYTRYPTAMINE; MIGRAINE; DIHYDROERGOTAMINE; CLASSIFICATION; VASODILATATION; MECHANISM SO - British Journal of Pharmacology 2001 ;132(5):983-990 2587 UI - 14200 AU - Centurion D AU - Sanchez-Lopez A AU - De Vries P AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Univ, Fac Med & Hlth Sci, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacobiol, Calzada Tenorios 235,Col Ganjas Coapa, Mexico City 14330, DF, Mexico TI - The GR127935-sensitive 5-HT1 receptors mediating canine internal carotid vasoconstriction: resemblance to the 5-HT1B, but not to the 5-HT1D or 5-ht(1F), receptor subtype AB - 1 This study has further investigated the pharmacological profile of the GR127935-sensitive 5-HT1 receptors mediating vasoconstriction in the internal carotid bed of anaesthetized vagosympathectomized dogs. 2 One-minute intracarotid infusions of the agonists 5-hydroxytryptamine (5-HT; 0.1-10 mug min(-1); endogenous ligand) and sumatriptan (0.3-10 mug min(-1): 5-HT1B/1D), but not PNU-142633 (1-1000 mug min(-1); 5-HT1D) or LY344864 (1-1000 mug min(-1) 5-ht(1F)), produced dose-dependent decreases in internal carotid blood flow without changing blood pressure or heart rate. 3 The responses to 5-HT were apparently resistant to blockade by i.v. administration of the antagonists SB224289 (300 mug kg(-1) 5-HT1B), BRL15572 (300 mug kg(-1); 5-HT1D) or ritanserin (100 mug kg(-1); 5-HT2). In contrast, the responses to sumatriptan were antagonized by SB224289, but not by BRL15572. 4 In the animals receiving SB224289, but not those receiving BRL15572, the subsequent administration of ritanserin abolished the 5-HT-induced vasoconstriction and unmasked vasodilator component. Similarly, in ritanserin-treated animals, the subsequent administration of SB224289, but not BRL15572, completely blocked the 5-HT-induced vasoconstriction, revealing vasodilatation. In animals receiving initially BRL15572, the subsequent administration of SB224289 did not affect (except at 10 mug min(-1)) the vasoconstrictor responses to 5-HT. 5 Notably, in animals pretreated with 1000 mug kg(-1) of mesulergine, a 5-HT2/7 receptor antagonist, 5-HT produced a dose-dependent vasoconstriction, which was practically abolished by SB224289. After BRL15572, no further blockade was produced and the subsequent administration of ritanserin was similarly inactive. 6 These results suggest that the GR127935-sensitive 5-HT1 receptors mediating canine internal carotid vasoconstriction resemble the 5-HT1B but not the 5-HT1D or 5-ht(1F), receptor subtype MH - Mexico|Distrito Federal MH - Netherlands PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000167241300004 L2 - 5-hydroxytryptamine (5-HT);internal carotid vasoconstriction;5-HT1B receptor;SB224289;BRL15572;ritanserin;PNU-142633;LY344864;VAGOSYMPATHECTOMIZED DOGS; GUINEA-PIG; 5-HYDROXYTRYPTAMINE; SEROTONIN; MIGRAINE; ARTERIES; BINDING; VASODILATATION; PHARMACOLOGY; ANTAGONISTS SO - British Journal of Pharmacology 2001 ;132(5):991-998 2588 UI - 12769 AU - Cepeda-Palacios R AU - Monroy A AU - Mendoza MA AU - Scholl PJ AD - Univ Autonoma Baja Calif, Dept Zootecnia, La Paz, MexicoARS, USDA, MLIRU, Lincoln, NE, USACepeda-Palacios, R, Priv Del barro 114 & Blvd Colosio,Col Las Garzas, La Paz 23070, Baja Calif Sur, Mexico TI - Testicular maturation in the sheep bot fly Oestrus ovis AB - The process of testicular maturation in relation to intrapuparial development was studied in the sheep nasal bot fly, Oestrus ovis L. (Diptera: Oestridae). After formation of the puparium. during larval-pupal apolysis and the cryptocephalic pupal stage (approximate to 24-72 h), spermatogonia had undergone mitotic divisions and sperm cysts had been formed. Five days after pupariation, spermatogonia transformed into primary spermatocytes during the phanerocephalic pupal stage, and secondary spermatocytes first appeared during the pupal-adult apolysis. Secondary spermatocytes began undergoing the second meiotic division by day 8 (transparent-eye pharate adult stage). By days 9 and 10, round spermatids were present and began to elongate by day 11. By day 12, the first bundles of tailed spermatozoa had appeared. By day 15 (the yellow-orange eye pharate adult stage), round, elongated, tailed and bundled spermatids. were predominant and by day 17 differentiating spermatids occupied nearly 35% of the testicular cavity, and 60% was occupied by free sperm, By day 21 (the red-brown eye pharate adult stage), spermatozoa colonized the seminal vesicle. At emergence (approximate to day 22), a complement of free sperm occupied the testis and the seminal vesicle, but groups of developing cells frequently remained in certain zones. Spermatogenesis was carried out after pupariation and spermiogenesis occurred during the pharate adult stage. After emergence, males possessed fully formed spermatozoa ready for ejaculation MH - Mexico|Baja California Sur MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0269-283X UR - ISI:000171127600006 L2 - Oestrus ovis;Diptera;gonads;male;reproduction;spermatogenesis;ESTRUS-OVIS; OESTRIDAE; DIPTERA SO - Medical and Veterinary Entomology 2001 ;15(3):275-280 2589 UI - 13860 AU - Cerda JLR AU - Langfelder I AU - Ohnishi R AU - Ichikawa M AD - Univ Michoacana, Lab Catalisis, Escuela Ingn Quim, Morelia 58000, Michoacan, MexicoUniv Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoHokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 060, JapanUniv Tecn Eslovaca, Dept Ingn Quim & Biooquim, Bratislava, SlovakiaCerda, JLR, Univ Michoacana, Lab Catalisis, Escuela Ingn Quim, Edificio U CU,Apto Postal 52J, Morelia 58000, Michoacan, Mexico TI - Methane homologation on supported molybdenum oxides AB - In the present study, it is investigated the reaction of Methane Homologation on different catalysts based on molybdenum at 700 degreesC and at different pressures. All catalytic samples studied contain 3%/weight of molybdenum on different supports, like: HZSM-5, NaZSM-5, NaY, Mordenite, SAPO, FSM-16, AIPO, AIPO modified with Co and L zeolite. From all this, the best catalyst to produce aromatic compounds was Mo/HZSM-5. The effect of pressure and the presence of water in the methane reaction have been investigated using this catalyst. A pressure increase maintains a quite uniform catalytic activity, but the global effect is a decrease in the production of hydrocarbons, as it might be expected from the thermodynamics. The presence of water during the methane reaction increases the conversion, reduces the production of hydrocarbons and produces more CO. Besides these experiments, it was studied the reaction of ethylene and benzene on Mo/HZSM-5 at 700 degreesC and one atmosphere of pressure. These last results let us propose a reaction mechanism for Methane Homologation MH - Japan MH - Mexico|Michoacan MH - Slovakia PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - Spanish IS - 0001-9704 UR - ISI:000168230700013 L2 - activity;mechanism;methane homologation SO - Afinidad 2001 ;57(491):69-72 2590 UI - 12922 AU - Cerdeira A AU - Estrada M AU - Garcia R AU - Ortiz-Conde A AU - Sanchez FJG AD - CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Mexico City 07300, DF, MexicoUniv Simon Bolivar, Lab Elect Estado Solido, Caracas 1080A, VenezuelaCerdeira, A, CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Ave IPN 2508,Apdo Postal 14-740, Mexico City 07300, DF, Mexico TI - New procedure for the extraction of basic a-Si : H TFT model parameters in the linear and saturation regions AB - A new procedure is proposed to extract basic parameters for the AIM-Spice amorphous thin film transistor model in the above-threshold region. Our method avoids non-linear optimization, which is mainly the method utilized up to now. when using a program extractor included in AIM-Spice. The present extraction procedure is based on the integration of the experimental data current. The integration method as in known is convenient to decrease the effects of experimental noise. The method is applied to the linear and saturation regions for the above-threshold regime and allows the extraction of all the above-threshold parameters. The accuracy of the simulated curves using the parameters extracted with the new procedure is verified with measured and calculated data using the expressions contained in the model. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000170893100005 L2 - TFT;a-Si : H transistor model;amorphous transistor;parameter extraction;AIM-spice models SO - Solid-State Electronics 2001 ;45(7):1077-1080 2591 UI - 14214 AU - Ceron-Mireles P AU - Harlow SD AU - Sanchez-Carrillo CI AU - Nunez RM AD - Univ Michigan, Dept Epidemiol, Ann Arbor, MI 48109, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoDirecc Gen Salud Ambiental, Ctr Nacl Salud Ambiental, Metepec, MexicoHarlow, SD, Univ Michigan, Dept Epidemiol, 109 Observ St, Ann Arbor, MI 48109 USA TI - Risk factors for pre-eclampsia/eclampsia among working women in Mexico City AB - This study examined risk factors for pre-eclampsia/eclampsia in a population-based sample of pregnant working women in Mexico City. Over a 3-month period, all women who gave birth at three major hospitals and who had worked for at least 3 months during pregnancy were interviewed. After excluding mothers with multiple gestations or infants with birth defects, and previous diagnoses of hypertension, chronic renal disease or diabetes, 131 of 2436 women (5.4%) had been diagnosed with pre-eclampsia and/or eclampsia. The frequency was much higher among women of low socio-economic status: 12% of uninsured women (SSA) compared with 4.2% of private sector employees (IMSS) and 1.3% of public sector employees (ISSSTE). After adjusting for education, women working in services (OR = 1.68, 95% CI = 1.01, 2.81) and in retail (OR = 1.99, 95% CI = 1.18, 3.37), primiparae (OR = 2.64, 95% Ci = 1.65, 4.21) and women whose pregestational weight was greater than or equal to 55 kg (OR = 2.02, 95% CI = 1.34, 3.04) were at increased risk. Efforts to develop and evaluate intervention programmes should target hospitals serving the uninsured (SSA) if reduction in the number of preventable maternal deaths in Mexico is to be achieved. Such programmes should also target service and retail workers and identify women with poor glycaemic control early in pregnancy MH - USA MH - Mexico|Estado De Mexico MH - Mexico|Morelos PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Obstetrics & Gynecology;Pediatrics U5 - J;Article AV - English IS - 0269-5022 UR - ISI:000167236900007 L2 - PREGNANCY-INDUCED HYPERTENSION; HEALTHY NULLIPAROUS WOMEN; INSULIN-RESISTANCE; PREECLAMPSIA; EPIDEMIOLOGY; MOTHERS SO - Paediatric and Perinatal Epidemiology 2001 ;15(1):40-46 2592 UI - 13362 AU - Cervantes-Contreras M AU - Lopez-Lopez M AU - Melendez-Lira M AU - Tamura M AU - Hiroyama Y AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoSumitomo Chem Co Ltd, Tsukuba, Ibaraki 3003294, JapanLopez-Lopez, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Molecular beam epitaxial growth of GaN on (100)- and (111) Si substrates coated with a thin SiC layer AB - GaN layers were grown by molecular beam epitaxy using an RF activated nitrogen plasma source on Si substrates with (1 0 0)- and (1 1 1) orientations. Previous to the GaN growth a SiC layer was formed on the substrates by UHV-annealing under a C2H2 over-pressure. The structural characterization of the samples by scanning- and transmission electron microscopy, atomic force microscopy, and X-ray diffraction, showed that alpha -GaN acid beta -GaN epitaxial layers were obtained on the (1 1 1)- and (1 0 0) SiC coated Si substrates, respectively. The optical properties of the epilayers were studied by room temperature photoreflectance, and 12K photoluminescence spectroscopy. The results show that the cubic GaN on (1 0 0) SiC coated Si substrates presented the higher crystal quality.;(C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000169557600084 L2 - crystal structure;interfaces;molecular beam epitaxy;nitrides;semiconducting gallium compounds;semiconducting silicon;GALLIUM NITRIDE; 001 SILICON; CUBIC GAN; SI(001); TRANSITIONS SO - Journal of Crystal Growth 2001 ;227():425-430 2593 UI - 12904 AU - Cervantes-Martinez CT AU - Frey KJ AU - White PJ AU - Wesenberg DM AU - Holland JB AD - N Carolina State Univ, USDA, ARS, Plant Sci Res Unit,Dept Crop Sci, Raleigh, NC 27695, USAUniv Autonoma Chapingo, Texcoco 56230, Edo Mexico, MexicoIowa State Univ Sci & Technol, Dept Agron, Ames, IA 50011, USAIowa State Univ Sci & Technol, Dept Food Sci & Human Nutr, Ames, IA 50011, USAARS, USDA, Natl Small Grains Germplasm Res Facil, Aberdeen, ID 83210, USAHolland, JB, N Carolina State Univ, USDA, ARS, Plant Sci Res Unit,Dept Crop Sci, Box 7620, Raleigh, NC 27695 USA TI - Selection for greater beta-glucan content in oat grain AB - Oat (Avena sativa L.) beta -glucan lowers serum cholesterol in humans. Development of oat cultivars with greater groat (caryopsis) beta -glucan content would increase the nutritional and economic value of the crop. The objectives of this experiment were to evaluate the response to phenotypic selection among individual So plants for greater groat beta -glucan content in two genetically broad-based populations; to compare selected experimental lines to standard check cultivars; and to estimate genetic variances and heritabilities and to test for nonadditive genetic variance for beta -glucan content. We measured groat beta -glucan contents of check cultivars and parental lines and random S-0:1 lines from initial and selected generations of each population grown in field experiments in 1996 and 1997 at two Iowa locations. Mean beta -glucan content increased from 53.9 to 59.9 g kg(-1) in one population, and from 63.5 to 66.0 g kg(-1) in the other, following selection. Genetic variance of beta -glucan content decreased by 9 to 22% following selection, but heritability for beta -glucan content did not change significantly. Heritability estimates ranged from 0.80 to 0.85 on a line mean basis. Additive variance was the only substantial component of genetic variance. Some experimental lines had significantly greater beta -glucan content than the best check cultivars and lines. Phenotypic selection for greater groat beta -glucan content will be effective for developing cultivars with elevated beta -glucan contents MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170881200016 L2 - CORONARY HEART-DISEASE; SERUM-CHOLESTEROL; CEREAL-GRAINS; FIBER; BRAN; HERITABILITY; INHERITANCE; CALCOFLUOR; CULTIVARS; OATMEAL SO - Crop Science 2001 ;41(4):1085-1091 2594 UI - 12320 AU - Cervantes-Sanchez JJ AU - Hernandez-Rodriguez JC AU - Angeles J AD - Univ Guanajuato, Dept Ingn Mecan, Col Bellavista 36730, Salamanca Gto, MexicoMcGill Univ, Dept Mech Engn, Montreal, PQ H3A 2K6, CanadaMcGill Univ, Ctr Intelligent Machines, Montreal, PQ H3A 2K6, CanadaCervantes-Sanchez, JJ, Univ Guanajuato, Dept Ingn Mecan, Calle Tamp 902, Col Bellavista 36730, Salamanca Gto, Mexico TI - On the kinematic design of the 5R planar, symmetric manipulator AB - A complete kinematic characterization of the 5R planar, symmetric manipulator, intended as a design aid, is proposed in this paper. The characterization scheme relies on the configuration of the Cartesian workspace plots (CWP), the Cartesian workspace singularity plots (CWSP), the joint workspace plots (JWP) and the joint workspace singularity plots (JWSP). These plots are given in terms of two nondimensional geometric parameters, lambda and mu, that represent the lengths of the manipulator links; these parameters can be used to investigate the relationships between the link lengths of the manipulator and the underlying workspace and singularity distribution. The plots can be regarded as an atlas of the workspace and singularity distribution that should find applications in analysis and design. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 0094-114X UR - ISI:000172291500009 L2 - PARALLEL MANIPULATORS; SINGULARITY ANALYSIS; WORKSPACE; CRITERIA; CHAINS SO - Mechanism and Machine Theory 2001 ;36(11-12):1301-1313 2595 UI - 12855 AU - Cervino M AU - Gomez-Flechoso MA AU - Castander FJ AU - Schaerer D AU - Molla M AU - Knodlseder J AU - Luridiana V AD - Observ Midi Pyrenees, CNRS, UMR 5572, F-31400 Toulouse, FranceUPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, FranceMax Planck Inst Extraterr Phys, D-85748 Garching, GermanyObserv Geneva, CH-1290 Sauverny, SwitzerlandYale Univ, New Haven, CT 06520, USAUniv Chile, Santiago, ChileUniv Autonoma Madrid, Dept Fis Teor C XI, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoEuropean So Observ, D-85748 Munich, GermanyCervino, M, Observ Midi Pyrenees, CNRS, UMR 5572, 14 Ave Edouard Belin, F-31400 Toulouse, France TI - Confidence limits of evolutionary synthesis models - III. On time-integrated quantities AB - Evolutionary synthesis models are a fundamental tool to interpret the properties of observed stellar systems. In order to achieve a meaningful comparison between models and real data, it is necessary to calibrate the models themselves, i.e. to evaluate the dispersion due to the discreteness of star formation as well as the possible model errors. In this paper we show that linear interpolations in the log M log t(k) plane, that are customary in the evaluation of isochrones in evolutionary synthesis codes, produce unphysical results. We also show that some of the methods used in the calculation of time-integrated quantities (kinetic energy, and total ejected masses of different elements) may produce unrealistic results. We propose alternative solutions to solve both problems. Moreover, we have quantified the expected dispersion of these quantities due to stochastic effects in stellar populations. As a particular result, we show that the dispersion in the N-14/C-12 ratio increases with time MH - Chile MH - France MH - Germany MH - Mexico|Distrito Federal MH - Spain MH - Switzerland MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171086800009 L2 - galaxies : starburst;galaxies : evolution;galaxies : statistics;120 M(CIRCLE-DOT); STELLAR MODELS; MASSIVE STARS; METALLICITY; GRIDS; GALAXIES; REGIONS SO - Astronomy & Astrophysics 2001 ;376(2):422-433 2596 UI - 13552 AU - Cesarman G AU - Rojas JC AU - Hernandez G AU - Luna NR AU - Wessels BW AU - Lara A AU - Shah S AD - Inst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoCase Western Reserve Univ, Cleveland, OH 44106, USAPeregrine Pharmaceut Inc, Tustin, CA, USA TI - Dosimetry estimates for I-131-CHTNT-1/B (Cotara (TM)) administered to patients with prostate and pancreatic carcinoma MH - Mexico|Distrito Federal MH - USA PB - RESTON: SOC NUCLEAR MEDICINE INC RP - NOT IN FILE U3 - TC 0 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Meeting Abstract AV - English IS - 0161-5505 UR - ISI:000168821900933 SO - Journal of Nuclear Medicine 2001 ;42(5):245P-245P 2597 UI - 12782 AU - Cespedes CL AU - Hoeneisen M AU - Bittner M AU - Becerra J AU - Silva M AD - UNAM, Inst Quim, Mexico City 04510, DF, MexicoConcepcion Univ, Fac Ciencias Nat & Oceanog, Concepcion, ChileCespedes, CL, UNAM, Inst Quim, Mexico City 04510, DF, Mexico TI - Comparative study of ovatifolin antioxidant and growth inhibition activities AB - A comparative study on the effect of arturin (1), ovatifolin (3), deacetylovatifolin (5), and their 1-acetoxyarturin (2), 8-acetoxyovatifolin (4), 1,10-epoxyovatifolin (6), and 11,13-dihydroovatifolin (7)derivatives, isolated from Podanthus ovatifolius and Podanthus mitiqui, on the seedling growth, germination, and respiration of several monocot and dicot weedy target species was carried out. In addition to the inhibitory activity on the bleaching of crocin induced by alkoxyl radicals, these compounds also displayed scavenging properties toward DPPH in TLC autographic and spectrophotometric assays. The results indicate that ovatifolin (3), deacetylovatifolin (5), epoxyovatifolin (6), dihydroovatifolin (7), and the CH2Cl2 extract interfere with pre-emergence of seedlings at the level of respiration. These compounds appear to have selective effects on the radicle and shoot growth of Physalis ixocarpa and Trifolium pratense. Their allelopathic effects are comparable to those of parthenolide, a know natural growth inhibitor MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000171214900017 L2 - Podanthus ovatifolius;P. mitiqui;ovatifolin;germacrane;sesquiterpene lactone;Asteraceae;phytogrowth inhibition;seed respiration;radical scavengers;DPPH;NATURAL HERBICIDE MODELS; SESQUITERPENE LACTONES; POTENTIAL USE; BIOLOGICAL-ACTIVITIES; DEHYDROZALUZANIN-C; CEDRELA-CILIOLATA; GERMINATION; ALLELOCHEMICALS; PHYTOTOXICITY; CONSTITUENTS SO - Journal of Agricultural and Food Chemistry 2001 ;49(9):4243-4251 2598 UI - 13084 AU - Cespedes CL AU - Alarcon J AU - Aranda E AU - Becerra J AU - Silva M AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUnit Autonoma Estado Morelos, Ctr Invest Biotecnol, Cuernavaca, Morelos, MexicoUniv Bio Bio, Dpto Ciencias Basicas, Fac Ciencias, Chillan, ChileConcepcion Univ, Dpto Botan, Fac Ciencias Nat & Oceanog, Concepcion, ChileCespedes, CL, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Insect growth regulator and insecticidal activity of beta-dihydroagarofurans from Maytenus spp. (Celastraceae) AB - From the aerial parts of Maytenus disticha, we have isolated 9 beta -benzoyloxy-1 alpha ,2 alpha ,6 beta ,8 alpha ,15-penta-acetoxy-dihydro-beta -agarofuran (1) and from seeds of Maytenus boaria 9 beta -furoyloxyl-1 alpha ,6 beta ,8 alpha -triacetoxy-dihydro-beta -agarofuran (2). These compounds and their MeOH and hexane/ethyl acetate (1:1 v/v) extracts were evaluated for their effects on the fall armyworm (Spodoptera frugiperda). Toosendanin, a commercial insecticide derived from Melia azedarach was used as a positive control. When tested for activity using neonate larvae in a no-choice artificial diet bioassays, the agarofurans 1, 2 and toosendanin as well as the MeOH and hexane/EtOAc extracts caused significant growth inhibitory effects with GC(50) of 7.55; 3.84; 1.75; 14.0 and 7.3 ppm at 7 days, respectively. Compounds I and 2 caused 100% larval mortality at 25 and 15 ppm, respectively. MeOH and hexane/EtOAc extracts caused 100% larval mortality at 25.0 ppm, respectively, they also increased the development time of surviving larvae and a significant delay for the time of pupation and adult emergence. These compounds showed comparable potency of activity with toosendanin. Acute toxicity against adults of S. frugiperda was also found, for hexane/EtOAc extract and 2 had the most potent activity with LD50 value of 4.7 and 1.9 ppm, respectively. MeOH extract, hexane/EtOAc extract, 1 and 2 caused acetylcholinesterase inhibition with 78.0, 89.2, 79.3 and 100% inhibition at 15.0 ppm, respectively. Therefore, the furoyloxy agarofuran may be responsible for the insecticidal activity of these plants MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 13 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000170271900021 L2 - CHILEAN CELASTRACEAE; INHIBITION; ACETYLCHOLINESTERASE; ANTIFEEDANT; SESQUITERPENES; AGAROFURANS; TRITERPENE; TERPENOIDS; LIMONOIDS; EXTRACTS SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2001 ;56(7-8):603-613 2599 UI - 13997 AU - Cespedes CL AU - Calderon JS AU - Salazar JR AU - Lotina-Hennsen B AU - Segura R AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Colombia, Fac Ciencias, Santa Fe Bogota, ColombiaCespedes, CL, Natl Autonomous Univ Mexico, Inst Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Plant-growth inhibitory activity of cedrelanolide from Cedrela salvadorensis AB - The effect of cedrelanolide, the most abundant limonoid isolated from Cedrela salvadorensis (Meliaceae), was assayed as a plant-growth inhibitory compound against monocotyledonous and dicotyledonous seeds. This compound inhibited germination. seed respiration, and seedling dry weights of some plant species (Lolium multiflorum, var. Hercules, Triticum vulgare. var Salamanca, Physalis ixocarpa, and Trifolium alexandrinum). Our results indicate that cedrelanolide interferes with monocot preemergence properties, mainly energy metabolism of the seeds at the level of respiration. In addition, the compound inhibits photophosphorylation. H+ uptake. and noncyclic electron Row. This behavior might be responsible for its plant-growth inhibitory properties and its possible role as an allelopathic agent MH - Colombia MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000167772000011 L2 - Cedrela salvadorensis;cedrelanolide;Meliaceae;phytogrowth inhibition;seed respiration;Hill reaction inhibitor;limonoid;nortriterpenoid;ELECTRON-TRANSPORT; SWIETENIA-HUMILIS; MELIA-TOOSENDAN; MEXICAN PLANTS; LIMONOIDS; CHLOROPLASTS; TETRANORTRITERPENOIDS; DERIVATIVES; ALLELOPATHY; CILIOLATA SO - Journal of Chemical Ecology 2001 ;27(1):137-149 2600 UI - 12206 AU - Chacon-Nava JG AU - Stott FH AU - Martinez-Villafane A AU - meraya-Calderon FM AU - Gonzalez-Rodriguez JG AD - Ctr Invest Mat Avanzados SC, Div Deterioro Mat & Integridad Estructural, Chihuahua 31109, MexicoUMIST, Ctr Corros & Protect, Manchester M60 1QD, Lancs, EnglandUniv Autonoma Estado Morelos, Cuernavaca, Morelos, MexicoChacon-Nava, JG, Ctr Invest Mat Avanzados SC, Div Deterioro Mat & Integridad Estructural, Chihuahua 31109, Mexico TI - The erosion-corrosion performance of SA213-T22 steel in low velocity conditions AB - The erosion-corrosion (E-C) behavior of SA213-T22 steel has been studied in a laboratory fluidized-bed (FB) facility in the temperature range from 100 to 600 degreesC. Tests were carried out on pin specimens in air using alumina particles of 560 mum average size at impact velocities from 1.5 to 4.5 m/s. The trends of wear with temperature showed small weight gains at velocities up to 1.5 m/s. Erodent deposition was a dominant process at temperatures below about 300 degreesC and velocities below about 2 m/s. At higher velocities, a peak wastage temperature was observed at about 350 degreesC. The wastage/temperature curves observed in both cases suggested four temperature regions. In each region, a different E-C regime operates. Scanning electron microscopy (SEM) revealed various wastage mechanisms, i.e., (a) oxide chipping, (b) development of a compact and adherent oxide scale, (c) oxide and metal removal, and (d) fracture and spalling within the oxide layer and at the scale/metal interface. In the present study, the latter mechanism was responsible for the high wastage rates observed at temperatures above about 450 degreesC and impact velocities above 3.5 m/s MH - United Kingdom MH - Mexico|Chihuahua MH - Mexico|Morelos PB - MATERIALS PARK: ASM INTERNATIONAL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1059-9495 UR - ISI:000172684500011 L2 - erosion-corrosion;laboratory test;low-alloy steel;low-impact velocity;temperature effects;wastage mechanisms;TEMPERATURE; ENVIRONMENTS SO - Journal of Materials Engineering and Performance 2001 ;10(6):699-704 2601 UI - 11918 AU - Chames M AU - Barton J AU - Hnat M AU - Schwemberger S AU - Khoury J AU - Baeza I AU - Campos B AD - Univ Cincinnati, Cincinnati, OH, USACent Baptist Hosp, Lexington, KY, USAShriners Hosp Children, Cincinnati, OH, USAInst Politecn Nacl, Natl Sch Biol Sci, Mexico City, DF, Mexico TI - Antigenic lipid structures are increased in the serum of patients with preeclampsia MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 0002-9378 UR - ISI:000172921000330 SO - American Journal of Obstetrics and Gynecology 2001 ;185(6):S173-S173 2602 UI - 12935 AU - Chaney M AU - Grande R AU - Wigneshweraraj SR AU - Cannon W AU - Casaz P AU - Gallegos MT AU - Schumacher J AU - Jones S AU - Elderkin S AU - Dago AE AU - Morett E AU - Buck M AD - Univ London Imperial Coll Sci Technol & Med, Fac Life Sci, Dept Biol & Biochem, London SW7 2AZ, EnglandUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Reconocimiento Mol & Biostruct, Cuernavaca 62250, Morelos, MexicoBuck, M, Univ London Imperial Coll Sci Technol & Med, Fac Life Sci, Dept Biol & Biochem, Sir Alexander Fleming Bldg, London SW7 2AZ, England TI - Binding of transcriptional activators to sigma 54 in the presence of the transition state analog ADP-aluminum fluoride: insights into activator mechanochemical action AB - Conformational changes in sigma 54 (sigma (54)) and sigma (54)-holoenzyme depend on nucleotide hydrolysis by an activator. We now show that sigma (54) and its holoenzyme bind to the central ATP-hydrolyzing domains of the transcriptional activators PspF and NifA in the presence of ADP-aluminum fluoride, an analog of ATP in the transition state for hydrolysis. Direct binding of sigma (54) Region I to activator in the presence of ADP-aluminum fluoride was shown and inferred from in vivo suppression genetics. Energy transduction appears to occur through activator contacts to sigma (54) Region I. ADP-aluminum fluoride-dependent interactions and consideration of other AAA+ proteins provide insight into activator mechanochemical action MH - United Kingdom MH - Mexico|Morelos PB - PLAINVIEW: COLD SPRING HARBOR LAB PRESS RP - NOT IN FILE U3 - TC 61 U4 - Cell Biology;Developmental Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0890-9369 UR - ISI:000170863100011 L2 - sigma 54;activators;transcription;ADP center dot AlFx;AAA plus proteins;CORE RNA-POLYMERASE; KLEBSIELLA-PNEUMONIAE; ESCHERICHIA-COLI; PROTEIN NTRC; REGION-I; ENHANCER RESPONSIVENESS; TERMINAL SEQUENCES; MOLECULAR MACHINE; ATP HYDROLYSIS; DNA SO - Genes & Development 2001 ;15(17):2282-2294 2603 UI - 12183 AU - Chang L AU - Lee OY AU - Naliboff B AU - Mayer EA AD - Univ Calif Los Angeles, CURE, Digest Dis Res Ctr, Neuroenter Dis Program,Dept Med, Los Angeles, CA 90024, USAVA Greater Los Angeles Healthcare Syst, Los Angeles, CA, USAHanyang Univ, Coll Med, Dept Med, Seoul 133791, South KoreaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City, DF, MexicoChang, L, Univ Calif Los Angeles, CURE Clin Res Ctr, 924 Westwood Blvd, Los Angeles, CA 90024 USA TI - Sensation of bloating and visible abdominal distension in patients with irritable bowel syndrome AB - OBJECTIVES: Abdominal bloating and distension are common symptoms of irritable bowel syndrome (IBS). The postulated pathophysiological mechanisms underlying these symptoms include increased production, retention, or perception of gas or luminal contents. The aims of this study were to prospectively compare the prevalence of, and clinical factors related to, bloating and distension in an IBS patient population. METHODS: A total of 714 consecutive patients who met Rome I criteria for IBS were prospectively surveyed, and were classified as having bloating alone (B) or bloating and distension (B-I-D) based on a comprehensive bowel symptom questionnaire. GI, extraintestinal, and psychological symptoms, as well as health-related quality of life measures were also assessed using validated survey instruments. RESULTS: A total of 542 IBS patients (76%) who reported abdominal bloating were studied. Of these, 132 patients fulfilled criteria for the B group, whereas 410 patients fulfilled criteria for the B+D group. There was a significantly different gender distribution in the B and B+D groups (female:male ratios, 1.4:1 and 2.8:1, respectively p < 0.02). There was also a significantly different bowel habit subgroup distribution, with a greater predominance of constipation in B+D group and of diarrhea in the B group (p < 0.03). Both groups were similar in other clinical parameters, including progressive worsening of symptoms during the day, and relief by passing stool or gas. Both bloating and distension worsened when other abdominal symptoms worsened. Abdominal distension was associated with greater symptom severity and less diurnal variation in symptoms, and was less often perceived as associated with food intake. CONCLUSIONS: Bloating and visible abdominal distension may arise from two distinct but interrelated physiological processes. Although the sensation of bloating may be related to enhanced sensitivity to visceral afferent stimulation, abdominal distension in more severely affected patients may be related to triggering of a visceromotor reflex affecting the tone of abdominal wall muscles. (C) 2001 by Am. Coll. of Gastroenterology MH - USA MH - Mexico|Distrito Federal MH - South Korea PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 26 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0002-9270 UR - ISI:000172766500020 L2 - INTESTINAL GAS; UNITED-STATES; DISORDERS; SYMPTOMS; IMPACT; PAIN; FERMENTATION; PREVALENCE; PERCEPTION SO - American Journal of Gastroenterology 2001 ;96(12):3341-3347 2604 UI - 13471 AU - Chang L AU - Naliboff BD AU - Schmulson M AU - Lee OY AU - Olivas TI AU - Mayer EA AD - Univ Calif Los Angeles, Sch Med, CURE Neuroenter Dis Prog, Los Angeles, CA, USAInst Nacl, Dept Gastroenterol, Mexico City, DF, MexicoHanyang Univ, Seoul 133791, South Korea TI - The role of gender and bowel habit predominance on visceral perception in IBS MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 9 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0016-5085 UR - ISI:000168514703755 SO - Gastroenterology 2001 ;120(5):A755-A755 2605 UI - 12957 AU - Chang YK AU - Hashimoto JM AU - Moura-Alcioli R AU - Martinez-Bustos F AD - Univ Estadual Campinas, Dept Tecnol Aliments, BR-13083970 Campinas, SP, BrazilCINVESTAV, Norponiente 2000, Queretaro, MexicoChang, YK, Univ Estadual Campinas, Dept Tecnol Aliments, Caixa Postal 6121, BR-13083970 Campinas, SP, Brazil TI - Twin-screw extrusion of cassava starch and isolated soybean protein blends AB - The effects of the extrusion parameters on isolated soybean protein (ISP) and cassava starch (CS) blends were studied. Extruded samples were prepared by using a ZSK-30 Werner and Pfleiderer twin-screw extruder. The study was carried out using Response Surface Methodology. The ISP followed by the moisture content were the most important linear variables significantly affecting axial expansion, specific volume, water solubility index and colour difference. The radial and axial expansion ranged from 2.30 to 3.77 and from 1.02 to 2.62, respectively. The highest ISP concentrations in the blends resulted in the highest specific volumes of the extrudates. Simultaneous increases of the barrel temperature and ISP level increased the water absorption index and lowered the water solubility index of the extrudates. Extruded products were softer at higher barrel temperature. The greatest difference in colour values was for the blends with the highest ISP concentration MH - Brazil MH - Mexico|Queretaro PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0027-769X UR - ISI:000170683200003 L2 - SOY PROTEIN; PRODUCTS; COMPONENTS; COOKING; RATIO SO - Nahrung-Food 2001 ;45(4):234-240 2606 UI - 11235 AU - Charatonik JJ AU - Charatonik WJ AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Missouri, Dept Math & Stat, Rolla, MO 65409, USACharatonik, JJ, Univ Nacl Autonoma Mexico, Inst Math, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - A degree of nonlocal connectedness AB - To any continuum X we assign an ordinal number (or the symbol infinity) s(X), called the degree of nonlocal connectedness of X. We show that 1) the degree cannot be increased under continuous surjections; (2) for hereditarily unicoherent continua X. the degree of a subcontinuum of X is less than or equal to s(X); (3) s(C(X)) less than or equal to s(X), where C(X) denotes the hyperspace of subcontinua of a continuum X. We also investigate the degrees of Cartesian products and inverse limits. As an application we construct an uncountable family of metric continua X homeomorphic to C(X) MH - Mexico|Distrito Federal MH - Poland MH - USA PB - TEMPE: ROCKY MT MATH CONSORTIUM RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0035-7596 UR - ISI:000175287400006 L2 - cartesian product;continuum;degree;hereditarily unicoherent;hyperspace;inverse limit;locally connected;ordinal number SO - Rocky Mountain Journal of Mathematics 2001 ;31(4):1205-1236 2607 UI - 12434 AU - Charatonik JJ AU - Prajs JR AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Opole, Inst Math, PL-45052 Opole, PolandIdaho State Univ, Dept Math, Pocatello, ID 83209, USACharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - On local connectedness of absolute retracts AB - Conditions are found for classes K of continua under which absolute retracts for K are locally connected. A number of corollaries is obtained MH - Mexico|Distrito Federal MH - Poland MH - USA PB - BERKELEY: PACIFIC JOURNAL MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0030-8730 UR - ISI:000172012600004 SO - Pacific Journal of Mathematics 2001 ;201(1):83-88 2608 UI - 13387 AU - Charatonik JJ AU - Charatonik WJ AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Missouri, Dept Math & Stat, Rolla, MO 65409, USACharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Inverse limits and openness of the induced mappings AB - The pointed versions of exactness of commutative diagrams and of exactness and limit erectness of mappings between inverse systems are introduced. These concepts are used to investigate interiority of a limit mapping between inverse limits of topological spaces. The obtained results are applied to show openness of some induced mappings between hyperspaces. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000169541000001 L2 - exact diagram;hyperspace;induced mapping;inverse limit;inverse system;limit mapping;open mapping SO - Topology and Its Applications 2001 ;114(3):235-260 2609 UI - 14489 AU - Charatonik JJ AU - Charatonik WJ AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - The Effros metric AB - The concepts of the Effros metric and the Effros property are extended in such a way that a semigroup M of surjective self mappings of a bounded metric space (in place of autohomeomorphism group) is used in the definitions, Relations between the Effros property for M and M-homogeneity are investigated. Special attention is paid to locally connected continua and the class C of all continuous mappings between them. It is shown that local absolute retracts, as well as locally connected curves, have the Effros property for C, while 2-dimensional locally connected continua do not have this property. A number of questions are asked. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000166459200003 L2 - continuum;dendrite;Effros metric;Effros property;homogeneous;locally connected;mapping;metric;open SO - Topology and Its Applications 2001 ;110(3):237-255 2610 UI - 14490 AU - Charatonik JJ AU - Charatonik WJ AU - Illanes A AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Property of Kelley for confluent retractable continua AB - The property of Kelley for confluent retractable continua is studied. It is shown that a confluent retractable continuum has the property of Kelley if and only if each of its proper subcontinua has the property. An example is constructed of a confluent retractable continuum without the property of Kelley. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000166459200004 L2 - confluent;continuum;property of Kelley;retraction SO - Topology and Its Applications 2001 ;110(3):257-263 2611 UI - 13433 AU - Chaturvedi P AU - Warren CD AU - Altaye M AU - Morrow AL AU - Ruiz-Palacios G AU - Pickering LK AU - Newburg DS AD - Shriver Ctr Mental Retardat, Waltham, MA 02452, USAHarvard Univ, Massachusetts Gen Hosp, Sch Med, Boston, MA, USAEastern Virginia Med Sch, Norfolk, VA 23510, USAInst Nacl Ciecias Med & Nutr, Mexico City 14000, DF, MexicoNewburg, DS, Shriver Ctr Mental Retardat, Waltham, MA 02452, USA TI - Fucosylated human milk oligosaccharides vary between individuals and over the course of lactation AB - Specific human milk oligosaccharides, especially fucosylated neutral oligosaccharides, protect infants against specific microbial pathogens. To study the concentrations of individual neutral oligosaccharides during lactation, a total of 84 milk samples were obtained from 12 women at 7 time periods during weeks 1-49 postpartum. The neutral oligosaccharides from each sample were isolated, perbenzoylated, resolved, and quantified by reversed-phase highperformance liquid chromatography, The resultant oligosaccharide peaks, identified by co-elution with authentic standards and mass spectrometry, ranged in size from trito octasaccharides, The total concentration of oligosaccharides declined over the course of lactation; the mean concentration at 1 year was less than half that in the first few weeks postpartum One of the 12 donors produced milk fucosyloligosaccharides that were essentially devoid of alpha1,2 linkages (but contained alpha1,3- and alpha1,4-linked fucose) until late in lactation, consistent with the nonsecretor phenotype, In milk samples from the remaining 11 donors, fucosyloligosaccharides containing alpha1,2-linked fucose were prevalent, and their profiles were distinct from those of fucosyloligosaccharides devoid of alpha1,2-linked fucose, The ratio of al,2-linked oligosaccharide concentrations to oligosaccharides devoid of al,2-1inked fucose changed during the first year of lactation from 5:1 to 1:1, Furthermore, the absolute and the relative concentrations of individual oligosaccharides varied substantially, both between individual donors and over the course of lactation for each individual. The patterns of milk oligosaccharides among individuals suggest the existence of many genotype subpopulations. This variation in individual oligosaccharide concentrations suggests that the protective activities of human milk could also vary among individuals and during lactation MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 33 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0959-6658 UR - ISI:000169566600005 L2 - human milk;oligosaccharide;lactation;HPLC;RAT SMALL-INTESTINE; ESCHERICHIA-COLI; NONIMMUNOGLOBULIN FRACTION; DEVELOPMENTAL-CHANGES; CELLS; INHIBITION; COMPONENTS; COLOSTRUM; ADHESION; IDENTIFICATION SO - Glycobiology 2001 ;11(5):365-372 2612 UI - 12687 AU - Chaty S AU - Mirabel IF AU - Marti J AU - Rodriguez LF AD - Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, EnglandCEA Saclay, Serv Astrophys, Gif Sur Yvette, FranceConsejo Nacl Invest Cient & Tecn, IAFE, RA-1033 Buenos Aires, DF, ArgentinaUniv Jaen, Escuela Politecn Super, Dept Fis, Jaen, SpainInst Astron, Morelia 58190, Michoacan, MexicoChaty, S, Open Univ, Dept Phys & Astron, Walton Hall, Milton Keynes MK7 6AA, Bucks, England TI - On the nature of the microquasar V4641 Sagittarii AB - We present photometric and spectroscopic optical and near-infrared (NIR) observations taken during the outburst on September 1999 of the source V4641 Sgr=SAX J1819.3-2525 (in't Zand et al., 2000) = XTE J1819-254 (Markwardt et al., 1999). We show that our observations suggest a distance between 4 and 8 kpc, the spectral type of the companion star being constrained between B3 and A2 V, making the system a High Mass X-ray Binary System (HMXB). In view of the radio and optical/NIR observations, it is possible that the ejecta of the source interacted with the surrounding medium of the source MH - Argentina MH - United Kingdom MH - France MH - Mexico|Michoacan MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000171500900043 SO - Astrophysics and Space Science 2001 ;276():153-156 2613 UI - 14249 AU - Chaty S AU - Rodriguez LF AU - Mirabel IF AU - Geballe TR AU - Fuchs Y AU - Claret A AU - Cesarsky CJ AU - Cesarsky D AD - Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, EnglandCEA Saclay, SAp,DAPNIA, DSM, Serv Astrophys, F-91191 Gif Sur Yvette, FranceUNAM, Inst Astron, Morelia 58190, Michoacan, MexicoInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaGemini Observ, Hilo, HI 96720, USAESO, D-85748 Garching, GermanyUniv Paris 11, Inst Astrophys Spatiale, F-91450 Orsay, FranceMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyChaty, S, Open Univ, Dept Phys & Astron, Walton Hall, Milton Keynes MK7 6AA, Bucks, England TI - A search for possible interactions between ejections from GRS 1915+105 and the surrounding interstellar medium AB - We have observed an extended region surrounding the first discovered galactic superluminal source GRS 1915+105, seeking evidence of interaction between the relativistic ejecta of that object and the interstellar medium. We find two radio sources axisymmetrically aligned along the sub-arcsecond relativistic ejecta of GRS 1915+105 and roughly 17' distant from it, which coincide with the luminous IRAS sources 19124+1106 and 19132+1035. We have observed these sources at centimeter (VLA), millimeter (IRAM 30 m), and infrared (ISO, UKIRT, ESO/MPI 2.2 m) wavelengths in both line and continuum emission. At centimeter wavelengths a non-thermal jet-like feature aligned along the outflow axis is located adjacent to the inner edge of the southern source. Strong density enhancements are found in the millimeter tracers CO and (HCO+)-C-13 at the positions of both sources and some of the morphology is reminiscent of shock-like interactions; however, linewidths are narrow. At infrared wavelengths strong hydrogen recombination lines and weak lines of molecular hydrogen are observed at the southern source. We discuss these results as possible evidence of the sought-after interaction, both in terms of the regions undergoing ongoing shock-heating and in terms of them being locations of shock-induced star formation. The evidence for each of these is inconclusive. Millimeter line mapping of a portion of W 50 where the relativist;ic jets of the X-ray binary SS 433 interact with the interstellar medium shows roughly similar morphology as GRS 1915+105, suggesting that the phenomena observed at the IRAS sources may not be unusual for such a long distance interaction MH - Argentina MH - United Kingdom MH - France MH - Germany MH - Mexico|Michoacan MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167131600032 L2 - stars : individual : GRS 1915+105, SS 433;ISM : individual objects : IRAS 19124+1106, IRAS 19132+1035;ISM : jets and outflows;X-rays : stars;SUPERLUMINAL SOURCE; SHOCKED CO; GRS-1915+105; GALAXY; DISCOVERY; J1655-40; RADIO; JET SO - Astronomy and Astrophysics 2001 ;366(3):1035-1046 2614 UI - 12363 AU - Chavez-Cerda S AU - Gutierrez-Vega JC AU - New GHC AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Quantum Opt & Laser Sci Grp, London SW7 2BW, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoChavez-Cerda, S, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Quantum Opt & Laser Sci Grp, London SW7 2BW, England TI - Elliptic vortices of electromagnetic wave fields AB - We demonstrate the existence of elliptic vortices of electromagnetic scalar wave fields. The corresponding intensity profiles are formed by propagation-invariant confocal elliptic rings. We have found that copropagation of this kind of vortex occurs without interaction. The results presented here also apply for physical systems described by the (2 + 1)-dimensional Schrodinger equation. (C) 2001 Optical Society of America MH - United Kingdom MH - Mexico|Puebla PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000172175300021 L2 - OPTICAL VORTICES; NONDIFFRACTING BEAMS; SOLITONS SO - Optics Letters 2001 ;26(22):1803-1805 2615 UI - 14557 AU - Chavez-Paez M AU - Van Workum K AU - de Pablo L AU - de Pablo JJ AD - Univ Wisconsin, Dept Chem Engn, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoChavez-Paez, M, Univ Wisconsin, Dept Chem Engn, 1415 Engn Dr, Madison, WI 53706 USA TI - Monte Carlo simulations of Wyoming sodium montmorillonite hydrates AB - Monte Carlo simulations have been used to predict the interlayer basal separations of sodium-saturated Wyoming clays at constant stress (NPzzT ensemble) and at constant chemical potential (mu VT ensemble). These simulations use the Ewald summation technique to incorporate long-range Coulombic interactions in the calculation of the total potential energy and the pressure tensor. A comparison is made between the use of one, two, and three sheets of clay. It is shown that, for small separations, at least two separate clay sheets must be used to avoid system-size effects. The stable interlamellar separations are determined by combining results from isostress-isothermal and grand canonical simulations. It is shown that, consistent with experiments, at the temperature and pressure studied here, the cations in the interlayer are hydrated, except at the smallest basal separations. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 37 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000166213100039 L2 - INTERLAYER MOLECULAR-STRUCTURE; SWELLING CLAY-MINERALS; LIQUID WATER; SYSTEMS; DYNAMICS; VAPOR SO - Journal of Chemical Physics 2001 ;114(3):1405-1413 2616 UI - 12877 AU - Chavez BE AU - Galicia OM AU - Geffroy E AU - Zenit R AU - Mena B AU - Huilgol RR AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoFlinders Univ S Australia, Dept Math & Stat, Adelaide, SA 5001, AustraliaChavez, BE, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360,Cd Univ, Mexico City 04510, DF, Mexico TI - Grain drying and aeration in a solar hexagonal silo AB - The processes involved in the drying and aeration of grain in a silo were studied. Experiments were performed on a model silo based on the design recently proposed by Hernandez-Cordero et al. (2000), capable of minimizing the dynamic stresses during the emptying process, therefore reducing the amount of grain losses due to mechanical damage during storage. This study addressed the second most important factor for grain losses, the grain loss resulting from lack of aeration and excess moisture. Air was injected into the interior of the model silo to study the grain drying time. The temperature of the air was controlled with an electrical heater that simulated a solar energy source. Day and night operating conditions were simulated by switching the heating on and off alternatively for periods of approximately 12 hours. The moisture of grain samples was monitored over time to obtain the rate of moisture decrease. The experimental results compared very well with the predictions of an established model. The mean difference between the experiments and the model was within in 1%. It is shown that a significant decrease in the drying time is achieved with the proposed system. A system operated with day solar heating achieved drying times 100% shorter than those obtained with a system with no heating. When, in addition to day heating, night aeration was used reductions of the order of 300% in the drying time were obtained. Comparisons between different operating conditions show that this system is a viable option to reduce the drying times and cost of operation for drying processes MH - Australia MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0272-6351 UR - ISI:000170975000003 L2 - SYSTEMS SO - Particulate Science and Technology 2001 ;19(1):45-65 2617 UI - 11921 AU - Chavez E AU - Navarro G AU - BaezaYates R AU - Marroquin JL AD - Univ Michoacana, Escuela Ciencias Fisicomatemat, Morelia 58000, Michoacan, MexicoUniv Chile, Dept Ciencias Computac, Santiago, ChileCIMAT, Guanajuato 36000, MexicoChavez, E, Univ Michoacana, Escuela Ciencias Fisicomatemat, Edificio B,Ciudad Univ, Morelia 58000, Michoacan, Mexico TI - Searching in metric spaces AB - The problem of searching the elements of a set that are close to a given query element under some similarity criterion has a vast number of applications in many branches of computer science, from pattern recognition to textual and multimedia information retrieval. We are interested in the rather general case where the similarity criterion defines a metric space, instead of the more restricted case of a vector space. Many solutions have been proposed in different areas, in many cases without cross-knowledge. Because of this, the same ideas have been reconceived several times, and very different presentations have been given for the same approaches. We present some basic results that explain the intrinsic difficulty of the search problem. This includes a quantitative definition of the elusive concept of "intrinsic dimensionality." We also present a unified view of all the known proposals to organize metric spaces, so as to be able to understand them under a common framework. Most approaches turn out to be variations on a few different concepts. We organize those works in a taxonomy that allows us to devise new algorithms from combinations of concepts not noticed before because of the lack of communication between different communities. We present experiments validating our results and comparing the existing approaches. We finish with recommendations for practitioners and open questions fur future development MH - Chile MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - NEW YORK: ASSOC COMPUTING MACHINERY RP - NOT IN FILE U3 - TC 86 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0360-0300 UR - ISI:000173564500001 L2 - algorithms;curse of dimensionality;nearest neighbors;similarity searching;vector spaces;NEAREST-NEIGHBOR SEARCH; TREES; FILE; ALGORITHM; QUERIES; TIME SO - Acm Computing Surveys 2001 ;33(3):273-321 2618 UI - 13757 AU - Chavez E AU - Marroquin JL AU - Navarro G AD - Univ Chile, Dept Comp Sci, Santiago, ChileCIMAT, Guanajuato, MexicoUniv Michoacana, Morelia, Michoacan, MexicoNavarro, G, Univ Chile, Dept Comp Sci, Santiago, Chile TI - Fixed queries array: A fast and economical data structure for proximity searching AB - Pivot-based algorithms are effective tools for proximity searching in metric spaces. They allow trading space overhead for number of distance evaluations performed at query time. With additional search structures (that pose extra space overhead) they can also reduce the amount of side computations. We introduce a new data structure, the Fixed Queries Array (FQA), whose novelties are (1) it permits sublinear extra CPU time without any extra data structure; (2) it permits trading number of pivots for their precision so as to make better use of the available memory. We show experimentally that the FQA is an efficient tool to search in metric spaces and that it compares favorably against other state of the art approaches. Its simplicity converts it into a simple yet effective tool for practitioners seeking for a black-box method to plug in their applications MH - Chile MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Computer Science, Information Systems;Computer Science, Software Engineering;Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1380-7501 UR - ISI:000168554700002 L2 - metric spaces;similarity search;range search;fixed queries tree;ALGORITHM; TREES SO - Multimedia Tools and Applications 2001 ;14(2):113-135 2619 UI - 14201 AU - Chavushyan V AU - Mujica R AU - Gorshkov AG AU - Konnikova VK AU - Mingaliev MG AU - Valdez JR AD - Natl Inst Astrophys Opt & Elect, Puebla, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Special Astrophys Observ, Nizhni Arkhyz 357142, RussiaChavushyan, V, Natl Inst Astrophys Opt & Elect, Puebla, Mexico TI - Radio and optical spectra of objects from two complete samples of radio sources AB - We present optical identifications and radio spectra for ten radio sources from two flux-density-complete samples. Radio variability characteristics are presented for four objects. The observations were obtained oil the RATAN-600 radio telescope at 0.97-21.7 GHz and the 2.1 m telescope of the Haro Observatory in Cananca, Mexico at 4200-9000 Angstrom. Among the ten objects studied, three are quasars, four are BL Lac objects, two are radio galaxies, and one is a Sy 1 galaxy. Two of the sources identified with BL Lac objects? 0509 + 0541 and 0527 + 0331, show rapid variability oil time scales of 7-50 days. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000167269900001 L2 - PHASE CALIBRATION SOURCES; FLUX-DENSITY; SKY SURVEY; VARIABILITY SO - Astronomy Reports 2001 ;45(2):79-85 2620 UI - 14390 AU - Chayet AS AU - Montes M AU - Gomez L AU - Rodriguez X AU - Robledo N AU - MacRae S AD - Codet Inst Oftalmol, Tijuana 22320, BC, MexicoCasey Eye Inst, Portland, OR, USAChayet, AS, Codet Inst Oftalmol, PADRE Kino 10159, Tijuana 22320, BC, Mexico TI - Bitoric laser in situ keratomileusis for the correction of simple myopic and mixed astigmatism AB - Objective: To evaluate the safety and efficacy of bitoric laser in situ keratomileusis (LASIK) for the correction of simple myopic and mixed astigmatism. Design: Retrospective, single-center, and noncomparative case series. Participants: Eighty-six eyes of 56 patients were analyzed for this study. Six-month and 1-year follow-up data were available on 86 eyes and 72 eyes, respectively. Eyes were divided in two groups according to the type of astigmatism: myopic astigmatism with low sphere (< -2 diopters) and mixed astigmatism. The range of astigmatism was 1.25 to 7.5 diopters, Intervention: LASIK was performed using the Automated Corneal Shaper (ACS) microkeratome (Bausch & Lomb, Claremont, CA) to create a cornea flap using the 130- or 160-micron thickness plate. A bitoric mid-stromal ablation was performed using the Nidek EC-5000 excimer laser (Nidek Company, Gamagori, Japan). Main Outcome Measures: Uncorrected visual acuity, manifest refraction, and best spectacle-corrected visual acuity were the parameters measured preoperatively and at months 1, 3, 6, and 12, Results: At the last visit, an uncorrected visual acuity of 20/20 or better was achieved in 77% and 68% of the myopic and mixed astigmatism groups, respectively. Ninety-two percent of all eyes had a mean spherical equivalent within +/- 0.50 diopter of emmetropia. A mean decrease in the vectorial magnitude of the astigmatism of 94% and 91% was achieved for those eyes with myopic and mixed astigmatism, respectively. There was no loss of best spectacle-corrected visual acuity, In two eyes, the axis of the positive cylinder was misaligned. Conclusion: Bitoric LASIK is an effective procedure to correct myopic and mixed astigmatism. Eighty-five percent of the eyes achieved an uncorrected visual acuity of 20/25 or better and had a final cylinder of 0.5 diopter or less. It is a safe operation, because no eyes lost any lines of best spectacle-corrected visual acuity. Longer follow-up may be needed to assess these results. Ophthalmology 2001;108:303-308 (C) 2001 by the American Academy of Ophthalmology MH - Mexico|Baja California MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 16 U4 - Ophthalmology U5 - J;Article AV - English IS - 0161-6420 UR - ISI:000166701800030 L2 - PHOTOREFRACTIVE KERATECTOMY; HYPEROPIC ASTIGMATISM SO - Ophthalmology 2001 ;108(2):303-308 2621 UI - 14253 AU - Cheang-Wong JC AU - Jergel M AU - Chromik S AU - Strbik V AU - Rickards J AU - Jergel M AU - Falcony C AU - Andrade E AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaCheang-Wong, JC, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Ion beam studies of Tl-based superconducting films prepared from fluorides AB - The elemental composition and depth profiles of Ba-Ca-Cu-(O, F) precursor and Tl-Ba-Ca-Cu-O (TBCCO) superconducting films were studied by ion beam analysis, such as Rutherford backscattering spectrometry (RBS) and resonant nuclear reaction (RNR). A series of 150-200 nm thick BCC(O, F) 212 and 223 precursor films was prepared by sequential thermal evaporation of BaF2, Cu and CaF2 components onto single-crystalline MgO and/or CeO2 buffered sapphire substrates. The BaF2 and CaF2 components are chemically more stable under atmospheric conditions than those of BaO and CaO oxides. Fluorine was partially removed from some of the as-evaporated BCC(O, F) precursor films by means of an ex situ annealing in vacuum and dry oxygen at 720 degreesC, RES and RNR measurements were performed on these films. Both types of precursor, i.e. the as-evaporated as well as the defluorinated ones, were then thallinated in a single-zone reaction chamber at 860 degreesC for 30 minutes using a crude TBCCO pellet as a source of thallous oxide Tl2O. The synthesized superconducting TBCCO films were characterized by resistance versus temperature measurements, x-ray diffraction, RES and also RNR analysis using the resonance at a proton energy of 340 keV of the F-19(p, alpha gamma)O-16 nuclear reaction. Mainly the Tl-2212 phase was observed in the superconducting TBCCO films, with T-c values up to 106 K. From the RES investigations we found that films with higher T-c have a slight excess of Tl, Ca and Cu components. While the RNR study revealed the presence of fluorine in both types of precursor film, no fluorine was observed in the superconducting ones (within the limit of sensitivity of our method) MH - Mexico|Distrito Federal MH - Slovakia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-2048 UR - ISI:000167069400007 L2 - THIN-FILMS; NUCLEAR-REACTIONS; DEPOSITION; DIFFUSION; BAF2; CU SO - Superconductor Science & Technology 2001 ;14(2):90-95 2622 UI - 13544 AU - Chehbouni A AU - Nouvellon Y AU - Kerr YH AU - Moran MS AU - Watts C AU - Prevot L AU - Goodrich DC AU - Rambal S AD - CESBIO, CNRS CNRS IRD UPS, F-31401 Toulouse 4, FranceUSDA ARS, SWRC, Tucson, AZ, USAIMADES, Hermosillo, Sonora, MexicoINRA, Bioclimatol Stn, Avignon, FranceCNRS, CEFE, Montpellier, FranceChehbouni, A, CESBIO, CNRS CNRS IRD UPS, 18 Ave Edouard Belin, F-31401 Toulouse 4, France TI - Directional effect on radiative surface temperature measurements over a semiarid grassland site AB - In this study, an experimental design was conceived, as part of the Semi-Arid-Land-Surface-Atmosphere (SALSA) program, to document the effect of view angle Variation on surface radiative temperature measurements. The results indicated differences between nadir and off-nadir radiative temperature of up to 5 K. The data also illustrated that, under clear sky and constant vegetation conditions, this difference is well correlated with surface soil moisture. However, the correlation decreased when the same comparison was made under changing vegetation conditions. To investigate the possibility of deriving component surface temperatures (soil and vegetation) using dual-angle observations of directional radiative temperature, two radiative transfer models (RTM) with different degrees of complexity were used. The results showed that despite their differences, the two models performed similarly in predicting the directional radiative temperature at a third angle. In contrast to other investigations, our study indicated that the impact of ignoring the cavity effect term is not very significant. However, omitting the contribution of the incoming long-wave radiation on measured directional radiance seemed to have a much larger impact. Finally, sensitivity analysis showed that an accuracy of better than 10% on the plant area index (PAI) was required for achieving a precision of 1 K for inverted vegetation temperature. An error of 1 K in measured directional radiative temperature can lead to an error of about 1 K in the soil and vegetation temperatures derived by inverting the RTM. (C) 2001 Elsevier Science Inc. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 10 U4 - Environmental Sciences;Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0034-4257 UR - ISI:000169100100007 L2 - SENSIBLE HEAT-FLUX; SPARSE SAHELIAN VEGETATION; INVERSION TECHNIQUES; CANOPY TEMPERATURE; TURBULENT FLUXES; KB(-1) PARAMETER; PLANT CANOPIES; ENERGY BALANCE; SALSA PROGRAM; LAND-SURFACE SO - Remote Sensing of Environment 2001 ;76(3):360-372 2623 UI - 13968 AU - Chehbouni A AU - Nouvellon Y AU - Lhomme JP AU - Watts C AU - Boulet G AU - Kerr YH AU - Moran MS AU - Goodrich DC AD - UPS, IRD, CNRS, CNES,CESBIO, F-31401 Toulouse 4, FranceSWRC, USDA ARS, Tuscon, AZ, USACEFE, CNRS, Montpellier, FranceIMADES, Hermosillo, Sonora, MexicoChehbouni, A, UPS, IRD, CNRS, CNES,CESBIO, 18 Ave Edouard Belin, F-31401 Toulouse 4, France TI - Estimation of surface sensible heat flux using dual angle observations of radiative surface temperature AB - In this study, dual angle observations of radiative surface temperature have been used in conjunction with a two-layer model to derive sensible heat flux over a sparsely vegetated surface. Data collected during the semi-arid-land-surface-atmosphere program (SALSA) over a semi-arid grassland in Mexico were used to assess the performance of the approach. The results showed that this approach led to reasonable estimates of the observed fluxes. The mean average percentage difference (MAPD) between observed and simulated fluxes was about 23%, which is not statistically different from the expected 20% scatter, when different flux measuring devices are compared over the same site. However, the sensitivity analysis indicated that the approach was rather sensitive to uncertainties in both measured radiative temperatures and aerodynamic characteristics of the vegetation. Finally, the issue of using dual angle observations of surface temperature for characterizing the difference between aerodynamic and nadir viewing radiative temperature has been examined. The results showed that this difference is linearly correlated with the difference between nadir and oblique radiative temperatures. Based on this finding, we expressed sensible heat flux in terms of the (nadir) radiative-air temperature gradient and a corrective term involving the nadir-oblique temperature differences. This formulation has been successfully tested. The resulting MAPD was about 33%. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000168076900005 L2 - aerodynamic temperature;directional radiative temperature;two-layer model;sensible heat flux;gap fraction;VEGETATED SURFACES; HETEROGENEOUS SURFACES; INFRARED THERMOMETRY; SPARSE VEGETATION; ROUGHNESS LENGTH; TURBULENT FLUXES; SKIN TEMPERATURE; SCALAR ROUGHNESS; ENERGY BALANCE; SALSA PROGRAM SO - Agricultural and Forest Meteorology 2001 ;108(1):55-65 2624 UI - 13022 AU - Chen GJ AU - Liu RZ AU - Silaghi-Dumitrescu I AU - Espinosa-Perez G AU - Zentella-Dehesa A AU - Lara-Ochoa F AD - Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R ChinaUniv Babes Bolyai, Dept Chem, RO-3400 Cluj Napoca, RomaniaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoChen, GJ, Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China TI - Electronic and magnetic properties of (tetrakis(2-pyridylmethyl)ethylenediamine)iron(II) perchlorate. A comparison of different computational methods AB - Based on the X-ray diffraction data, electronic and magnetic properties of the (tetrakis(2-pyridylmethyl)ethylenediamine)iron(II) perchlorate complex have been studied using three different unrestricted computational methods. The changes of energy versus temperature obtained by different computational methods are compared. The extent of spin contaminant and its influence on the energy, the spin, the charge populations, and the characteristics of molecular orbitals are analyzed in detail. Comparison of the computational results and spin-state transition phenomena of this complex demonstrates that the B3LYP method is the most satisfactory, leading to an excellent correlation with experimental data. (C) 2001 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - Peoples R China MH - Romania PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000170610000002 L2 - [Fe(tpen)](ClO4)(2);B3LYP;HF;PM3;theoretical study;SPIN-CROSSOVER COMPLEX; IRON(II) COMPLEXES; HEXADENTATE LIGANDS; TRANSITION; EQUILIBRIA SO - International Journal of Quantum Chemistry 2001 ;83(2):60-69 2625 UI - 13804 AU - Chen HY AU - Ruda HE AU - Navarro AZ AD - Univ Toronto, Ctr Adv Nanotechnol, Toronto, ON M5S 3E4, CanadaTampico Puerto Ind Altamira, Cicata Unidad Altamira, Altamira, Tamaulipas, MexicoChen, HY, Univ Toronto, Ctr Adv Nanotechnol, 170 Coll St, Toronto, ON M5S 3E4, Canada TI - Inductively coupled plasma etching of InP using N-2/H-2 AB - Inductively coupled plasma etching of InP in N-2/H-2 is demonstrated. The dependence of etch rates on N-2/H-2 composition, radio frequency power and etching pressure is presented. An optimized process is developed and shown to be suitable for the slow, well-controlled, etching of InP-based nanostructures, while yielding excellent surface morphology. (C) 2001 American Institute of Physics MH - Canada MH - Mexico|Tamaulipas PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000168438400010 L2 - III-V-SEMICONDUCTORS; SURFACE-INDUCED DAMAGE; COMPOUND SEMICONDUCTORS; HIGH-DENSITY; GAS-MIXTURE; ION; SIDEWALL; METHANE; GAAS; CH4/H2/AR SO - Journal of Applied Physics 2001 ;89(10):5322-5325 2626 UI - 11678 AU - Chen TH AU - Vazquez-Duhalt R AU - Wu CF AU - Bentley WE AU - Payne GF AD - Univ Maryland, Maryland Biotechnol Inst, Agr Biotechnol Ctr, College Pk, MD 20742, USAUniv Maryland Baltimore Cty, Dept Chem & Biochem Engn, Baltimore, MD 21250, USAUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Maryland, Dept Chem Engn, College Pk, MD 20742, USAPayne, GF, Univ Maryland, Maryland Biotechnol Inst, Agr Biotechnol Ctr, 5115 Plant Sci Bldg, College Pk, MD 20742 USA TI - Combinatorial screening for enzyme-mediated coupling. Tyrosinase-catalyzed coupling to create protein-chitosan conjugates AB - In nature, tyrosinase-generated o-quinones are commonly involved in processes that lead to functional biomaterials. These biomaterials are chemically complex and have been difficult to analyze. Furthermore, the cascade of reactions involving o-quinones is poorly understood, and it has been difficult to mimic ex vivo for materials processing. We report the use of a combinatorial approach to learn how tyrosinase and low molecular weight phenolic precursors can be used to generate biologically active protein-polysaccharide conjugates. Specifically, we screened various phenolic coupling precursors and various reaction conditions for the coupling of proteins onto the polysaccharide chitosan. Several natural phenols were identified as appropriate precursors for the coupling of polyhistidine tagged organophosphorus hydrolase (His-OPH) onto chitosan films. OPH activity was retained upon coupling and subsequent studies indicated that the histidine tag was not necessary for coupling. Using conditions identified for His-OPH coupling, we observed that various biologically active proteins (cytochrome c, OPH, and His-CAT) could be coupled onto chitosan films. The glycosylated protein horseradish peroxidase was not effectively coupled onto chitosan under the conditions studied. In all cases studied, we observed that coupling required a phenolic precursor, suggesting that tyrosinase is unable to couple by reaction with surface tyrosyl residues of the target protein. In conclusion, this study illustrates a combinatorial approach for the "discovery" of conditions to couple biologically active proteins onto chitosan through natural, quinone-based processes MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Chemistry, Organic;Polymer Science U5 - J;Article AV - English IS - 1525-7797 UR - ISI:000174256200018 L2 - MUSSEL ADHESIVE PROTEIN; INSECT CUTICLE; MYTILUS-EDULIS; MARINE MUSSEL; CROSS-LINKS; OXIDATION; NMR; CATECHOLAMINE; SPECTROSCOPY; SOLUBILITY SO - Biomacromolecules 2001 ;2(2):456-462 2627 UI - 13310 AU - Cheng D AU - Xu Q AU - Trapaga G AU - Lavernia EJ AD - PACE Enterprises, Los Angeles, CA 90013, USAUniv Calif Irvine, Dept Elect & Comp Engn, Irvine, CA 92697, USAIPN, CINVESTAV, Lab Invest Mat, Unidad Queretaro, Queretaro 76230, MexicoUniv Calif Irvine, Dept Chem & Biochem Engn & Mat Sci, Irvine, CA 92697, USACheng, D, PACE Enterprises, Los Angeles, CA 90013, USA TI - A numerical study of high-velocity oxygen fuel thermal spraying process. Part I: Gas phase dynamics AB - A mathematical model is formulated to simulate the effect of operational parameters on the gas dynamics that occur during high-velocity oxygen fuel (HVOF) thermal spraying. Computational fluid dynamic techniques are implemented to solve the Favre-averaged mass, momentum, and energy conservation equations. The renormalization group (RNG) kappa-epsilon turbulence model is used to account for the effect of turbulence, and high-order interpolation schemes are employed to resolve compressibility effects in the supersonic jets. The calculated results show that the most sensitive parameters affecting the process are propylene flow rate, total flow rate of oxygen and propylene (oxyfuel flow rate), total inlet gas flow rate, and barrel length. The results show that increasing the total inlet gas flow rate has limited effect on the gas velocity and temperature inside the nozzle for the parameter range investigated in the present study. However, increasing the total inlet gas flow rate increases the total thermal inertia and momentum inertia; moreover, under these conditions the flame gas is retained at a high velocity and temperature for a longer distance. Increasing the oxyfuel flow rate significantly increases flame velocity and temperature, particularly after exiting the nozzle. The effect of propylene flow rate is significant and complex. In order to minimize the extent of the oxidation of the sprayed powder particles and to achieve a high flame temperature and velocity, the overall injected stream should be adjusted to be propylene-rich. The nitrogen flow rate significantly affects the gas flow inside the gun. On the basis of the calculated results, it is evident that, in order to obtain maximum gas velocity and temperature, the nitrogen flow rate should be kept to a minimum, provided that particles can be delivered to the gun in a smooth manner. By minimizing the entrainment of the surrounding air, a nozzle with a longer barrel length achieves a relatively high gas velocity and temperature for a longer distance than does a nozzle with a shorter barrel length. The calculated results are in good agreement with available experimental results MH - Mexico|Queretaro MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000169772300004 L2 - NANOCRYSTALLINE INCONEL-718; BEHAVIOR; TORCH; NI SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2001 ;32(7):1609-1620 2628 UI - 12870 AU - Chernov V AU - Piters TM AU - Okuno E AU - Yoshimura EM AD - Univ Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoUniv Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, SP, BrazilChernov, V, Univ Sonora, Ctr Invest Fis, Apartado Postal 5-88, Hermosillo 83190, Sonora, Mexico TI - Photoluminescence and thermal stability of 5.5 eV and Ti centres in gamma irradiated LiF : Mg,Ti crystals AB - Photoluminescence (PL) and thermoluminescence (TL) measurements of LiF: Mg,Ti (DTG-4) single crystals, previously gamma irradiated with 500 Gy and thermally treated, were performed. The behaviour of the Mg centres, related to the known 5.5 eV optical absorption band, PL emission after repeated heating cycles with a heating rate of 1 K/s up to 373-653 K indicate that these centres are created simultaneously with the destruction of TL peaks. The decay of the PL emission after repeated heating cycles followed by 10 min annealing at 643 K coincides with the decreasing of the TL sensitisation factors of peaks 2, 3 and 5. Both these facts support the point of view that the precursors of the 5.5 eV centres. act as competitive traps during TL readout. The behaviour of the Ti-related PL emission was found to be unexpectedly complex. Noticeable change of the Ti band shape and ambiguous behaviour of the Ti emission during subsequent heating indicate the possible presence of an additional Ti band. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Brazil MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000170916000063 L2 - LiF : Mg, Ti;photoluminescence;sensitization SO - Radiation Measurements 2001 ;33(5):793-796 2629 UI - 13079 AU - Cherpitel CJ AU - Borges G AD - Inst Publ Hlth, Alochol Res Grp, Berkeley, CA 94709, USANatl Inst Psychiat, Mexico City, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Mexico City, DF, MexicoCherpitel, CJ, Inst Publ Hlth, Alochol Res Grp, 2000 Hearst Ave, Berkeley, CA 94709 USA TI - A comparison of substance use and injury among Mexican American emergency room patients in the United States and Mexicans in Mexico AB - Background: Emergency room (ER) studies have found differences in the association of alcohol with injury (intentional and unintentional) across cultures. These differences may be due to differences in drinking patterns across cultures. Few comparative data have been reported on associations of alcohol and injury between Mexican American ER patients and ER patients living in Mexico, and general population studies suggest that Mexican Americans may adopt more frequent heavy drinking patterns after migrating to the United States. Methods: A comparative analysis of drinking, drug use, and injury was performed in probability samples of 550 ER patients from Santa Clara County (San Jose, CA) and 1417 ER patients in Pachuca (Hidalgo), Mexico. Results: Both injured and uninjured (i.e., medical conditions) patients in Pachuca were less likely to report heavy drinking, drug use, drunkenness, or alcohol-related problems compared with those in Santa Clara. Those scoring high on level of acculturation in Santa Clara were more likely to report both drinking and drug use before the event, and heavy drinking, drug use, and consequences related to drinking in the last year compared with those scoring lower. Those scoring low on acculturation were similar on substance use variables to those in the Pachuca sample. Conclusions. Findings suggest that alcohol's association with injury may not just reflect typical drinking patterns in a culture. Among Mexican Americans, this association my vary by acculturation, and those migrating to the United States may be at increased risk for alcohol-related injury as their drinking patterns undergo change to those of the dominant culture. The ER, in this context, may take on increasing importance as a site for health services providers to implement intervention and prevention services for alcohol-related consequences in this ethnic group MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 13 U4 - Substance Abuse U5 - J;Article AV - English IS - 0145-6008 UR - ISI:000170458200012 L2 - substance use;injury;emergency room;Mexican Americans;Mexicans;ALCOHOL-CONSUMPTION PATTERNS; DRINKING PATTERNS; HISPANICS; WHITES; BLACKS; ACCULTURATION; POPULATIONS; CASUALTIES; TRENDS SO - Alcoholism-Clinical and Experimental Research 2001 ;25(8):1174-1180 2630 UI - 11260 AU - Cheung YL AU - Chan KC AU - Zhu YH AD - Hong Kong Polytech Univ, Dept Mfg Engn, Kowloon, Hong Kong, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoChan, KC, Hong Kong Polytech Univ, Dept Mfg Engn, Yuk Choi Rd,Hung Hom, Kowloon, Hong Kong, Peoples R China TI - Characterization of the icosahedral phase in as-cast quasicrystalline Al65CU20Fe15 alloy AB - Morphology features and microstructures of a quasicrystalline Al65Cu20Fe15 alloy were studied using X-ray diffraction, scanning electron microscopy (SEM), electron probe microanalysis, electron backscattered diffraction (EBSD), and transmission electron microscopy (TEM) techniques. A typical layer dendritic microstructure of the as-cast quasicrystalline alloy consisted of four phases: an Al71Cu5Fe24 phase as a core of the dendritic structure, which was surrounded by a quasicrystalline Al60Cu26Fe14 phase and a crystalline Al50Cu45Fe5 phase being in the interdendritic regions, and a Cu-rich Al44Cu54Fe2, phase. The quasicrystalline phase was characterized of three symmetries: five-, three-, and twofold. The Kikuchi diffraction patterns obtained from both SEM and TEM are very similar. It is shown that without the need to prepare thin film specimen, EBSD is an alternative method to characterize quasicrystals. (C) 2001 Published by Elsevier Science Inc MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 1044-5803 UR - ISI:000175189100019 L2 - EBSD;phase identification;SEM;quasicrystals;QUASI-CRYSTALS; AL-MN SO - Materials Characterization 2001 ;47(3-4):299-305 2631 UI - 12541 AU - Chichkova S AU - Arellano J AU - Vance CP AU - Hernandez G AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoUniv Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108, USAARS, USDA, Plant Sci Res Unit, St Paul, MN 55108, USAHernandez, G, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Ap Postal 565-A, Cuernavaca 62191, Morelos, Mexico TI - Transgenic tobacco plants that overexpress alfalfa NADH-glutamate synthase have higher carbon and nitrogen content AB - This work reports the characterization of transgenic tobacco (Nicotiana tabacum L.) plants that constitutively overexpress NADH-GOGAT. Three independent transformants, designated GOS10, GOS13 and GOS19 (for (GO) under bar GAT (s) under bar ense), with stable integration of the chimeric alfalfa NADH-GOGAT gene fused to the CaMV 35S promoter were studied. The transgene was stably integrated and inherited by the progeny. In these GOS lines, the expression of NADH-GOGAT mRNA and protein was detected at low levels in roots and leaves, while the expression of the host tobacco NADH-GOGAT gene was nearly undetectable. The roots of GOS lines showed an elevated (15-40%) enzyme activity as compared to control plants. When GOS plants were grown under greenhouse conditions and fed with either nitrate or ammonium as the sole nitrogen source, they showed higher total carbon and nitrogen content in shoots and increased shoot dry weight when plants were entering into the flowering stage, as compared to control plants. The observed phenotype of GOS plants was interpreted as reflecting a higher capacity to assimilate nitrogen due to a higher NADH-GOGAT activity MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 10 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000171847400002 L2 - nitrogen assimilation;NADH-GOGAT;transgenic tobacco;ROOT-NODULES; RICE PLANTS; SYNTHETASE GENE; AMMONIUM-IONS; EXPRESSION; ASSIMILATION; PROTEIN; ENZYME; LOCALIZATION; MODULATION SO - Journal of Experimental Botany 2001 ;52(364):2079-2087 2632 UI - 12403 AU - Chillik C AU - Young E AU - Gogorza S AU - Estofan D AU - Neuspiller N AU - Antunes N AU - Borges E AU - Petracco A AU - Vantman D AU - Fabres C AU - Montoya JM AU - Madero JI AU - Gutierrez-Najar A AU - Bronfenmajer S AU - Kovac's A AU - Kroeze S AU - Out HJ AD - CEGyR, Buenos Aires, DF, ArgentinaIFER, Buenos Aires, DF, ArgentinaHosp Italiano Buenos Aires, Buenos Aires, DF, ArgentinaCIGOR, Cordoba, ArgentinaFecunditas, Buenos Aires, DF, ArgentinaHosp Israelita Ablert Einstein, Unidade Reprod Humana, Buenos Aires, DF, ArgentinaFertilitat Ctr Med Reprod, Porto Alegre, RS, BrazilUniv Chile, Fac Med, IDIMI, Santiago 7, ChileLo Fontecilla, Clin Las Condes, Santiago 7, ChileFertility, Bogota, ColombiaHosp Angeles Pedegral, Grp Reprod & Genet AGN & Asociados, Mexico City, DF, MexicoHosp Clin, Caracas, VenezuelaCtr Med Docente La Trinidad, Unidad Reprod Humana, Caracas, VenezuelaNV Organon, NL-5340 BH Oss, NetherlandsOut, HJ, Organon Labs, Sci Pk, Cambridge CB4 0FL, England TI - A double-blind clinical trial comparing a fixed daily dose of 150 and 250 IU of recombinant follicle-stimulating hormone in women undergoing in vitro fertilization AB - Objective: To determine the efficacy and efficiency of two fixed doses of recombinant follicle-stimulating hormone (FSH) in controlled ovarian hyperstimulation. Design: Randomized, double-blind clinical trial. Setting: Fifteen IVF clinics in Argentina, Brazil, Chile, Colombia, Mexico, and Venezuela. Patient(s): Women between 30 and 39 years of age undergoing IVF or intracytoplasmic sperm injection (ICSI). Intervention(s): Daily doses of either 150 IU or 250 IU of recombinant FSH (Puregon) until at least two follicles greater than or equal to 20 mm were seen on ultrasound. Main Outcome Measure(s): Number of cumulus-oocyte complexes retrieved and total dose of recombinant FSH used. Result(s): Two hundred one women received 150 IU and 203 used 250 IU. In the low-dose group 8.9 oocytes were retrieved compared to 10.2 in the high-dose group (not significant). The 150 IU-treated women received a total of 1,589 IU and the total dose used in 250 IU treated women was 2,492 IU. Implantation rates were 10.0% in the 150 IU group and 10.9% in the 250 IU group. The vital pregnancy rates per started cycle in the low-dose and high-dose groups were 17.1% and 16.7%, respectively. Two women, both in the 250 IU group, were hospitalized because of the ovarian hyperstimulation syndrome (OHSS). Conclusion(s): An increase from 150 IU to 250 IU daily dose of recombinant FSH in women between 30 and 39 years of age has only limited value in augmenting ovarian response. (C) 2001 by American Society for Reproductive Medicine MH - Argentina MH - Brazil MH - Chile MH - Colombia MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands MH - Venezuela PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 21 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000172083900014 L2 - IVF;ICSI;FSH;Puregon;follistim;dose;randomized clinical trial;INVITRO FERTILIZATION; OVARIAN STIMULATION; FSH; GONADOTROPIN; EFFICACY; OOCYTES; PUREGON SO - Fertility and Sterility 2001 ;76(5):950-956 2633 UI - 14022 AU - Choi IR AU - Hall JS AU - Henry M AU - Zhang L AU - Hein GL AU - French R AU - Stenger DC AD - Univ Nebraska, USDA ARS, Lincoln, NE 68583, USAUniv Nebraska, Dept Plant Pathol, Lincoln, NE 68583, USACtr Int Mejoramiento Maiz & Trigo, Mexico City, DF, MexicoUniv Nebraska, Panhandle Res & Extens Ctr, Dept Entomol, Scottsbluff, NE, USAStenger, DC, Univ Nebraska, USDA ARS, 344 Keim Hall, Lincoln, NE 68583 USA TI - Contributions of genetic drift and negative selection on the evolution of three strains of wheat streak mosaic tritimovirus - Brief report AB - Genome sequences of three Wheat streak mosaic virus (WSMV) strains were compared. The Type and Sidney 81 strains of WSMV from the American Great Plains were closely related, with sequence identities of 97.6% (nucleotide) and 98.7% (amino acid). In contrast, the El Batan 3 strain from central Mexico was divergent, and shared only 79.2-79.3% (nucleotide) and 90.3-90.5% (amino acid) sequence identity with Type and Sidney 81. All three WSMV strains were serologically related, however the El Batan 3 capsid protein (CP) had 15 fewer amino acid residues. Phylogenetic analysis of the CP cistron indicated that Type, Sidney 81, and nine other American isolates of WSMV were closely related and distinct from the El Batan 3 sequence. Nucleotide substitutions among the WSMV strains were not randomly distributed across the genome with more variation within P1, HC-Pro, and CP and less within P3. One 400-nucleotide region of the genome, corresponding to the 3'-end of P3, was strikingly deficient in silent substitutions. Nonetheless, the ratio of synonymous to non-synonymous substitutions throughout the genome was essentially the same for all three WSMV strains. Collectively, our data indicate that both genetic drift and negative selection have contributed to the evolution of WSMV strains MH - Mexico|Distrito Federal MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 16 U4 - Virology U5 - J;Article AV - English IS - 0304-8608 UR - ISI:000167862700015 L2 - VIRUS CAPSID PROTEIN; NUCLEOTIDE-SEQUENCE; PHYLOGENETIC-RELATIONSHIPS; FAMILY POTYVIRIDAE; RYMOVIRUS; GENUS; POTYVIRUSES; CLONING SO - Archives of Virology 2001 ;146(3):619-628 2634 UI - 12032 AU - Chopin T AU - Buschmann AH AU - Halling C AU - Troell M AU - Kautsky N AU - Neori A AU - Kraemer GP AU - Zertuche-Gonzalez JA AU - Yarish C AU - Neefus C AD - Univ New Brunswick, Ctr Coastal Studies & Aquaculture, St John, NB E2L 4L5, CanadaUniv New Brunswick, Ctr Environm & Mol Algal Res, St John, NB E2L 4L5, CanadaUniv Los Lagos, Dept Acuicultura, Osorno, ChileStockholm Univ, Dept Syst Ecol, S-10691 Stockholm, SwedenRoyal Swedish Acad Sci, Beijer Int Inst Ecol Econ, S-10405 Stockholm, SwedenIsrael Oceanog & Limnol Res, Natl Ctr Mariculture, IL-88112 Elat, IsraelSUNY Coll Purchase, Div Nat Sci, Purchase, NY 10577, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoUniv Connecticut, Dept Ecol & Evolutionary Biol, Stamford, CT 06901, USAUniv New Hampshire, Dept Plant Biol, Off Biometr, Durham, NH 03824, USAChopin, T, Univ New Brunswick, Ctr Coastal Studies & Aquaculture, POB 5050, St John, NB E2L 4L5, Canada TI - Integrating seaweeds into marine aquaculture systems: A key toward sustainability AB - The rapid development of intensive fed aquaculture (e.g. finfish and shrimp) throughout the world is associated with concerns about the environmental impacts of such often monospecific practices, especially where activities are highly geographically concentrated or located in suboptimal sites whose assimilative capacity is poorly understood and, consequently, prone to being exceeded. One of the main environmental issues is the direct discharge of significant nutrient loads into coastal waters from open-water systems and with the effluents from land-based systems. In its search for best management practices, the aquaculture industry should develop innovative and responsible practices that optimize its efficiency and create diversification, while ensuring the remediation of the consequences of its activities to maintain the health of coastal waters. To avoid pronounced shifts in coastal processes, conversion, not dilution, is a common-sense solution, used for centuries in Asian countries. By integrating fed aquaculture (finfish, shrimp) with inorganic and organic extractive aquaculture (seaweed and shellfish), the wastes of one resource user become a resource (fertilizer or food) for the others. Such a balanced ecosystem approach provides nutrient bioremediation capability, mutual benefits to the cocultured organisms, economic diversification by producing other value-added marine crops, and increased profitability per cultivation unit for the aquaculture industry. Moreover, as guidelines and regulations on aquaculture effluents are forthcoming in several countries, using appropriately selected seaweeds as renewable biological nutrient scrubbers represents a cost-effective means for reaching compliance by reducing the internalization of the total environmental costs. By adopting integrated polytrophic practices, the aquaculture industry should find increasing environmental, economic, and social acceptability and become a full and sustainable partner within the development of integrated coastal management frameworks MH - Canada MH - Chile MH - Israel MH - Mexico|Baja California MH - Sweden MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 44 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Review AV - English IS - 0022-3646 UR - ISI:000173029500009 L2 - assimilative capacity;bioremediation;coastal health;environmental impacts;integrated aquaculture;integrated coastal management;nutrification;salmon;seaweeds;sustainability;ULVA-LACTUCA BIOFILTERS; FISH FARM; MUSSEL CULTURE; ECOLOGICAL FOOTPRINT; BENTHIC COMMUNITIES; CHONDRUS-CRISPUS; ATLANTIC SALMON; MYTILUS-EDULIS; CULTIVATION; NITROGEN SO - Journal of Phycology 2001 ;37(6):975-986 2635 UI - 13589 AU - Chromik S AU - Jergel M AU - Gazi S AU - Strbik V AU - Hanic F AU - Falcony C AU - Vasko M AU - Benacka S AD - SAS, Inst Elect Engn, Bratislava 84239, SlovakiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoSAS, Inst Measurement Sci, Bratislava 84219, SlovakiaChromik, S, SAS, Inst Elect Engn, Bratislava 84239, Slovakia TI - Influence of substrate and precursor film composition on morphology and superconducting transition of T1-2212 thin films characterized by microwaves AB - An influence of various substrates (MgO, LaAlO3, SrTiO3, YSZ, CeO2/r-sapphire) and Ba-Ca-Cu precursor chemical composition (212, 223) upon morphology and microwave quality of Tl2Ba2CaCu2O8 (T1-2212) thin films has been studied. Under the same thalliation conditions, T1-2212 phase has been synthesized in all films independently of the initial precursor film chemical composition (212, 223) with almost the same T-c values. However, the film surface morphology and, thus, the microwave surface impedance, both were found to be strongly dependent from the type of substrate used as well as from the precursor chemical composition. Films with sharp transition to the superconducting state were prepared when 212 precursors were deposited on the MgO and/or LaAlO3 substrates. (C) 2001 Elsevier Science B.V, All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000168952100086 L2 - T1-based thin films;morphology;microwaves;BUFFER LAYER; SAPPHIRE SO - Physica C 2001 ;354(1-4):429-432 2636 UI - 13568 AU - Chuang HY AU - Schwartz J AU - Gonzales-Cossio T AU - Lugo MC AU - Palazuelos E AU - Aro A AU - Hu H AU - Hernandez-Avila M AD - Brigham & Womens Hosp, Channing Lab, Dept Med, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAKaohsiung Med Univ Hosp, Dept Occupat Med, Kaohsiung, TaiwanInst Nacl Salud Publ, Ctr Invest Salud Poblacional, Cuernavaca, Morelos, MexicoAmer British Cowdry Hosp, Mexico City, DF, MexicoEmory Univ, Rollins Sch Publ Hlth, Dept Environm & Occupat Hlth, Atlanta, GA 30322, USAHu, H, Brigham & Womens Hosp, Channing Lab, Dept Med, 181 Longwood Ave, Boston, MA 02115 USA TI - Interrelations of lead levels in bone, venous blood, and umbilical cord blood with exogenous lead exposure through maternal plasma lead in peripartum women AB - Recent research has raised the possibility that fetal lead exposure is not estimated adequately by measuring lead content in maternal whole blood lead because of the variable partitioning of lead in whole blood between plasma and red blood cells. Lead in maternal plasma may derive in large part from maternal bone lead stores. In this study we aimed to estimate the contribution of maternal whole blood lead, maternal bone lead levels, and environmental lead to umbilical cord blood lead levels (as a measure of fetal lead exposure). In the model, we assumed that lead from all of these sources reaches the fetus through the maternal plasma lead pathway. In 1994-1995, we recruited 615 pregnant women for a study of lead exposure and reproductive outcomes in Mexico City. We gathered maternal and umbilical cord blood samples within 12 hr of each infant's delivery and measured maternal lead levels in cortical bone and trabecular bone by a K-X-ray fluorescence (K-XRF) instrument within 1 month after delivery. We administered a questionnaire to assess use of lead-glazed ceramics (LGC) to cook food and we obtained data on regional air lead levels during the 2 months before delivery. We used structural equation models (SEMs) to estimate plasma lead as the unmeasured (latent) variable and to quantify the interrelations of plasma lead, the other lead biomarkers, and environmental lead exposure. In the SEM analysis, a model that allowed plasma lead to vary freely from whole blood lead explained the variance of cord blood lead (as reflected by a total model R-2; R-2 = 0.79) better than did a model without plasma lead (r(2) = 0.67). Cortical bone lead, trabecular bone lead, use of LGC, and mean air lead level contributed significantly to plasma lead. The exchange of lead between plasma and red blood cells was mostly in the direction of plasma to cells. According to the final model, an increase in trabecular bone lead and cortical bone lead was associated with increases in cord blood lead of 0.65 and 0.25 mug/dL, respectively. An increase of 0.1 mug/m(3) in air lead was associated with an increase in the mean level of fetal cord blood lead by 0.67 mug/dL. With one additional day of LCG use per week in the peripartum period, the mean fetal blood lead level increased by 0.27 mug/dL. Our analyses suggested that maternal plasma lead varies independently from maternal whole blood lead and that the greatest influences on maternal plasma lead are maternal bone lead stores, air lead exposures, and recent cooking with LGC. The contributions from endogenous (bone) and exogenous (environmental) sources were relatively equal. Measurement of plasma and bone lead may be important in accurately assessing fetal lead exposure and its major sources, particularly if exogenous exposures decline MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Taiwan PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 20 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000169080800034 L2 - blood lead;bone lead;cord blood lead;maternal lead exposure;newborns;plasma lead;X-RAY-FLUORESCENCE; PREGNANCY; BURDEN; ERYTHROCYTES; MOBILIZATION; CHILDREN; SKELETON; ADULTS SO - Environmental Health Perspectives 2001 ;109(5):527-532 2637 UI - 12378 AU - Cicero-Fernandez P AU - Torres V AU - Rosales A AU - Cesar H AU - Dorland K AU - Munoz R AU - Uribe R AU - Martinez AP AD - Univ Calif Los Angeles, Sch Publ Hlth, Dept Environm Hlth Sci, Los Angeles, CA 90095, USANatl Ctr Environm Hlth, CENSA, Metepec 52140, MexicoVrije Univ Amsterdam, Inst Environm Studies, IVM, NL-1081 HV Amsterdam, NetherlandsMexico City Govt, Secretaria Medio Ambiente, Mexico City 06000, DF, MexicoPan Amer Hlth Org, Mexico City, DF, MexicoCicero-Fernandez, P, Univ Calif Los Angeles, Sch Publ Hlth, Dept Environm Hlth Sci, Los Angeles, CA 90095 USA TI - Evaluation of human exposure to ambient PM10 in the metropolitan area of Mexico City using a GIS-based methodology AB - The main goal of this study was to evaluate the magnitude of outdoor exposure to fine particulate matter (PM10) potentially experienced by the population of metropolitan Mexico City. With the use of a geographic information system (GIS), spatially resolved PM10. distributions were generated and linked to the local population. The PM10 concentration exceeded the 24-hr air quality standard of 150 mug/m(3) on 16% of the days, and the annual air quality standard of 50 mug/m(3) was exceeded by almost twice its value in some places. The basic methodology described in this paper integrates spatial demographic and air quality databases, allowing the evaluation of various air pollution reduction scenarios. Achieving the annual air quality standard would represent a reduction in the annual arithmetic average concentration of 14 mug/m(3) for the typical inhabitant. Human exposure to particulate matter (PM) has been associated with mortality and morbidity in Mexico City; reducing the concentration levels of this pollutant would represent a reduction in mortality and morbidity and the associated cost of such impacts. This methodology is critical to assessing the potential benefits of the current initiative to improve air quality implemented by the Environmental Metropolitan Commission of Mexico City MH - USA MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Netherlands PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000172140400010 L2 - AIR-POLLUTION; RECEPTOR MODEL; MORTALITY; PARTICULATE; OZONE; MEGACITIES; PARTICLES; CHILDREN SO - Journal of the Air & Waste Management Association 2001 ;51(11):1586-1593 2638 UI - 12900 AU - Cifuentes E AU - Gomez M AU - Blumenthal U AU - Tellez-Rojo M AU - Romieu I AU - Palacios GR AU - Ruiz-Velazco S AD - Univ Urugay, Montevideo, UruguayLondon Sch Hyg & Trop Med, London WC1, EnglandCtr Dis Control & Prevent, Atlanta, GA, USAUNAM, Inst Matemat Aplicadas, Mexico City, DF, Mexico TI - Risk factors for Giardia intestinalis infection in agricultural villages practicing wastewater irrigation in Mexico MH - United Kingdom MH - Mexico|Distrito Federal MH - Uruguay MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500382 SO - Epidemiology 2001 ;12(4):S78-S78 2639 UI - 13610 AU - Cifuentes F AU - Gonzalez CE AU - Fiordelisio T AU - Guerrero G AU - Lai FA AU - Hernandez-Cruz A AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biofis, Mexico City 04510, DF, MexicoUniv Wales Coll Med, Dept Cardiol, Cardiff CF14 4XN, S Glam, WalesHernandez-Cruz, A, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biofis, Circuito Exterior,POB 70-253, Mexico City 04510, DF, Mexico TI - A ryanodine fluorescent derivative reveals the presence of high-affinity ryanodine binding sites in the Golgi complex of rat sympathetic neurons, with possible functional roles in intracellular Ca2+ signaling AB - The plant alkaloid ryanodine (Ry) is a high-affinity modulator of ryanodine receptor (RyR) Ca2+ release channels. Although these channels are present in a variety of cell types, their functional role in nerve cells is still puzzling. Here, a monosubstituted fluorescent Ry analogue, B-FL-X Ry, was used to reveal the distribution of RyRs in cultured rat sympathetic neurons. B-FL-X Ry competitively inhibited the binding of [H-3]Ry to rabbit skeletal muscle SR membranes, with an IC50, of 150 nM, compared to 7 nM of unlabeled Ry. Binding of B-FL-X Ry to the cytoplasm of sympathetic neurons is saturable, reversible and of high affinity. The pharmacology of B-FL-X Ry showed marked differences with unlabeled Ry, which are partially explained by its lower affinity: (1) use-dependent reversible inhibition of caffeine-induced intracellular Ca2+ release; (2) diminished voltage-gated Ca2+ influx, due to a positive shift in the activation of voltage gated Ca currents. B-FL-X Ry-stained sympathetic neurons, viewed under confocal microscopy. showed conspicuous labeling of crescent-shaped structures pertaining to the Golgi complex, a conclusion supported by experiments showing co-localization with Golgi-specific fluorescent probes and the breaking up of crescent-shaped staining after treatment with drugs that disassemble Golgi complex. The presence of RyRs to the Golgi could be confirmed with specific anti-RyR(2) antibodies, but evidence of caffeine-induced Ca2+ release from this organelle could not be obtained using fast confocal microscopy. Rather, an apparent decrease of the cytosolic Ca2+ signal was detected close to this organelle. In spite of that, short-term incubation with brefeldin A (BFA) suppressed the fast component of caffeine-induced Ca2+ release, and the Ca2+ release process lasted longer and appeared less organized. These observations, which suggest a possible role of the Golgi complex in Ca homeostasis and signaling in nerve cells, could be relevant to reports involving derangement of the Golgi complex as a probable cause of some forms of progressive neuronal degeneration, such as Alzheimer's disease and amyotrophic lateral sclerosis. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Cell Biology U5 - J;Article AV - English IS - 0898-6568 UR - ISI:000168840600007 L2 - ryanodine;Golgi complex;Ca2+ release channels;caffeine;Ca2+ stores;ENDOPLASMIC-RETICULUM; RELEASE CHANNEL; CALCIUM-RELEASE; BREFELDIN-A; APPARATUS; CELLS; RECEPTOR; MUSCLE; PROTEIN; STAIN SO - Cellular Signalling 2001 ;13(5):353-362 2640 UI - 12813 AU - Cifuentes L AU - Borja-Aburto VH AU - Gouveia N AU - Thurston G AU - Davis DL AD - Carnegie Mellon Univ, H John Heinz III Sch Publ Policy & Management, Pittsburgh, PA 15213, USASecretaria Salud, Direcc Gen Salud Ambiental, Mexico City, DF, MexicoPontificia Univ Catolica Chile, Santiago, ChileUniv Sao Paulo, Fac Med, Dept Prevent Med, Sao Paulo, BrazilNYU, Sch Med, Nelson Inst Environm Med, Tuxedo Pk, NY 10987, USADavis, DL, Carnegie Mellon Univ, H John Heinz III Sch Publ Policy & Management, Pittsburgh, PA 15213 USA TI - Mitigating GHGs in developing countries - Response MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000171237200022 SO - Science 2001 ;293(5539):2391-2392 2641 UI - 12899 AU - Cifuentes L AU - Borja-Aburto V AU - Gouveia N AU - Thurston G AU - Davis D AD - Pontificia Univ Catolica Chile, Santiago, ChileINSP, Ctr Nacl Salud Ambiental, Mexico City, DF, MexicoNYU, Sch Med, Nelson Inst Environm Med, New York, NY 10012, USACarnegie Mellon Univ, Pittsburgh, PA 15213, USA TI - Assessment of the urban air pollution benefits of global warming mitigation: Santiago, Sao Paulo, Mexico City, and New York City MH - Chile MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500259 SO - Epidemiology 2001 ;12(4):S57-S57 2642 UI - 13092 AU - Cifuentes L AU - Borja-Aburto VH AU - Gouveia N AU - Thurston G AU - Davis DL AD - Carnegie Mellon Univ, H John Heinz III Sch Publ Policy & Management, Pittsburgh, PA 15213, USANYU, Sch Med, Nelson Inst Environm Med, Tuxedo Pk, NY 10987, USAUniv Sao Paulo, Fac Med, Dept Prevent Med, Sao Paulo, BrazilDirecc Gen Salud Ambiental, Mexico City, DF, MexicoPontificia Univ Catolica Chile, Santiago, ChileDavis, DL, Carnegie Mellon Univ, H John Heinz III Sch Publ Policy & Management, Pittsburgh, PA 15213 USA TI - Climate change: Hidden health benefits of greenhouse gas mitigation MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 40 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000170492600018 L2 - AIR-POLLUTION; INFANT-MORTALITY SO - Science 2001 ;293(5533):1257-1259 2643 UI - 13375 AU - Cifuentes L AU - Borja-Aburto VH AU - Gouveia N AU - Thurston G AU - Davis DL AD - Carnegie Mellon Univ, H John Heinz III Sch Publ Policy & Management, Pittsburgh, PA 15213, USAPontificia Univ Catolica Chile, Santiago, ChileSecretaria Salud, Mexico City, DF, MexicoUSP, Fac Med, Dept Prevent Med, BR-09500900 Sao Paulo, BrazilNYU, Sch Med, Nelson Inst Environm Med, Tuxedo, NY, USADavis, DL, Carnegie Mellon Univ, H John Heinz III Sch Publ Policy & Management, 5000 Forbes Ave, Pittsburgh, PA 15213 USA TI - Assessing the health benefits of urban air pollution reductions associated with climate change mitigation (2000-2020): Santiago, Sao Paulo, Mexico City, and New York City AB - To investigate the potential local health benefits of adopting greenhouse gas (GHG) mitigation policies, we develop scenarios of GHG mitigation for Mexico City, Mexico; Santiago, Chile; Sao Paulo, Brazil; and New York, New York, USA using air pollution health impact factors appropriate to each city. We estimate that the adoption of readily available technologies to lessen fossil fuel emissions over the next two decades in these four cities alone will reduce particulate matter and ozone and avoid approximately 64,000 (95% confidence interval [CI] 18.000-116,000) premature deaths (including infant deaths), 65,000 (95% CI 22,000-108,000) chronic bronchitis cases, and 37 million (95% CI 27-47 million) person-days of work loss or other restricted activity. These findings illustrate that GHG mitigation can provide considerable local air pollution-related public health benefits to countries that choose to abate GHG emissions by reducing fossil fuel combustion MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 15 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000169616900010 L2 - air pollution;climate policy;greenhouse gases mitigation;morbidity;mortality;ozone;particulate matter;public health;TIME-SERIES ANALYSIS; RESPIRATORY HOSPITAL ADMISSIONS; TERM AMBIENT CONCENTRATIONS; DAILY MORTALITY; PARTICULATE MATTER; LOS-ANGELES; CARDIOVASCULAR-DISEASE; INFANT-MORTALITY; MEDICAL VISITS; UNITED-STATES SO - Environmental Health Perspectives 2001 ;109():419-425 2644 UI - 12431 AU - Civitarese O AU - Reboiro M AU - Jesgarz S AU - Hess PO AD - Natl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCivitarese, O, Natl Univ La Plata, Dept Fis, CC 67, RA-1900 La Plata, Argentina TI - Coherent states and the calculation of nuclear partition functions AB - Coherent states are introduced as test functions to formulate the statistical mechanics of fermions and bosons interacting via schematic forces. Finite temperature solutions to the Lipkin model and to the Schutte-Da Providencia model are obtained by performing the statistical sum a la Hecht, e.g., by using coherent states. Comparison between present and exacts results is discussed MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000172077000026 L2 - TEMPERATURE; MODEL SO - Physical Review C 2001 ;6405(5): 2645 UI - 11119 AU - Clark GG AU - Martinez HQ AD - Ctr Dis Control & Prevent, Dengue Branch, San Juan, PR 00920, USAUniv Autonoma Nuevo Leon, Entomol Lab, Fac Ciencias Biol, Nuevo Leon, MexicoClark, GG, Ctr Dis Control & Prevent, Dengue Branch, 1324 Calle Canada, San Juan, PR 00920 USA TI - Mosquito vector control and biology in Latin America - An eleventh symposium - Abstracts AB - The 11th annual Latin American symposium presented by the American Mosquito Control Association (AMCA) was held as part of the 67th Annual Meeting in Dallas, TX, in February 2001. The principal objective, as for the previous 10 symposia, was to promote participation in the AMCA by vector control specialists. public health workers, and academicians from Latin America. This publication includes summaries of 45 presentations that were given orally in Spanish or presented as postern by participants from 8 countries in Latin America. Topics addressed in the symposium included results from chemical and biological control programs and studies: studies of insecticide resistance and population genetics, molecular. ecological. and behavioral studies of vectors of dengue (Aedes aegypti), malaria (Anopheles albimanus and Anopheles aquasalis), leishmaniasis (Lutzomyia), murine typhus. and Chagas' disease (Triatoma). Related topics included biology and control of Rhodnius, scorpions, Loxosceles spp., Chironomus plumosus, and Musca domestica MH - Mexico|Nuevo Leon MH - USA PB - EATONTOWN: AMER MOSQUITO CONTROL ASSOC RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 8756-971X UR - ISI:000175646600003 L2 - mosquitoes;mosquito control;Aedes;Anopheles;Culex;Lutomyia;Triatoma;scorpions;Loxosceles;Musca domestica;Chironomus;resistance SO - Journal of the American Mosquito Control Association 2001 ;17(3):166-180 2646 UI - 13316 AU - Clark P AU - Martinez H AU - Ryan G AU - Barile L AD - Univ Autonoma Mexico, IMSS, Mexico City, DF, MexicoUniv Missouri, Columbia, MO, USAClark, P, Univ Autonoma Mexico, IMSS, Mexico City, DF, Mexico TI - Women in rheumatology - Dr. Clark, et al reply MH - Mexico|Distrito Federal MH - USA PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Letter AV - English IS - 0315-162X UR - ISI:000169783900045 SO - Journal of Rheumatology 2001 ;28(7):1735-1736 2647 UI - 12461 AU - Clark RM AU - Bhatti S AU - Alonso E AU - Yescas R AU - Rasmussen A AU - Bidichandani SI AD - Univ Oklahoma, Hlth Sci Ctr, Oklahoma City, OK, USAInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Mexico City, DF, Mexico TI - GAA triplet-repeat variation at the Friedreich ataxia locus in Nahuatl Indians of Mexico MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901415 SO - American Journal of Human Genetics 2001 ;69(4):424-424 2648 UI - 13509 AU - Clarke KE AU - Oldroyd BP AU - Javier J AU - Quezada-Euan G AU - Rinderer TE AD - Univ Sydney, Sch Biol Sci A12, Sydney, NSW 2006, AustraliaUniv Autonoma Yucatan, Fac Med Vet & Zootecn, Merida 97100, Yucatan, MexicoUSDA ARS, Honey Bee Breeding Genet & Physiol Res Lab, Baton Rouge, LA 70820, USAClarke, KE, Univ Sydney, Sch Biol Sci A12, Sydney, NSW 2006, Australia TI - Origin of honeybees (Apis mellifera L.) from the Yucatan peninsula inferred from mitochondrial DNA analysis AB - Honeybees (Apis mellifera L.) sampled at sites in Europe, Africa and South America were analysed using a mitochondrial DNA restriction fragment length polymorphism (RFLP) marker. These samples were used to provide baseline information for a detailed analysis of the process of Africanization of bees from the neotropical Yucatan peninsula of Mexico. Radical changes in mitochondrial haplotype (mitotype) frequencies were found to have occurred in the 13-year period studied. Prior to the arrival of Africanized bees (1986) the original inhabitants of the Yucatan peninsula appear to have been essentially of southeastern European origin with a smaller proportion having northwestern European ancestry. Three years after the migration of Africanized bees into the area (1989), only very low levels of maternal gene flow from Africanized populations into the resident European populations had occurred. By 1998, however, there was a sizeable increase in the proportion of African mitotypes in domestic populations (61%) with feral populations having 87% of mitotypes classified as African derived. The results suggest that the early stages of Africanization did not involve a rapid replacement of European with African mitotypes and that earlier studies probably overestimated the prevalence of African mitotypes MH - Australia MH - Mexico|Yucatan MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000169228200001 L2 - Africanized bee;Apis mellifera;gene flow;honeybee;hybridization;mitochondrial RFLP;AFRICANIZED HONEYBEES; BEES; HYBRIDIZATION; POPULATIONS; DIVERSITY; SPREAD; RFLPS SO - Molecular Ecology 2001 ;10(6):1347-1355 2649 UI - 13525 AU - Clement F AU - Chavent G AU - Gomez S AD - INRIA Rocquencourt, F-78153 Le Chesnay, FranceUniv Paris 09, CEREMADE, F-75775 Paris 16, FranceNatl Autonomous Univ Mexico, IIMAS, Mexico City 01000, DF, MexicoClement, F, INRIA Rocquencourt, Domaine Voluceau,BP 1105, F-78153 Le Chesnay, France TI - Migration-based traveltime waveform inversion of 2-D simple structures: A synthetic example AB - Migration-based traveltime (MBTT) formulation provides algorithms for automatically determining background velocities from full-waveform surface seismic reflection data using local optimization methods. In particular, it addresses the difficulty of the nonconvexity of the least-squares data misfit function. The method consists of parameterizing the reflectivity in the time domain through a migration step and providing a multiscale representation for the smooth background velocity. We present an implementation of the MBTT approach for a 2-D finite-difference (FD) full-wave acoustic model. Numerical analysis on a 2-D synthetic example shows the ability of the method to find much more reliable estimates of both long and short wavelengths of the velocity than the classical least-squares approach, even when starting from very poor initial guesses. This enlargement of the domain of attraction for the global minima of the least-squares misfit has a price: each evaluation of the new objective function requires, besides the usual FD full-wave forward modeling, an additional full-wave prestack migration. Hence, the FD implementation of the MBTT approach presented in this paper is expected to provide a useful tool for the inversion of data sets of moderate size MH - France MH - Mexico|Distrito Federal PB - TULSA: SOC EXPLORATION GEOPHYSICISTS RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-8033 UR - ISI:000169231500014 L2 - SEISMIC-REFLECTION DATA; VELOCITY ESTIMATION; BACKGROUND VELOCITY; NONLINEAR INVERSION; ELASTIC INVERSION; FORM INVERSION; OPTIMIZATION; SEISMOGRAMS; ALGORITHMS; STRATEGY SO - Geophysics 2001 ;66(3):845-860 2650 UI - 12566 AU - Cockwell AE AU - Davalos IP AU - Rivera HR AU - Crolla JA AD - Salisbury Dist Hosp, Wessex Reg Genet Lab, Salisbury SP2 8BJ, Wilts, EnglandUniv Guadalajara, CUCS, Inst Mexicano Seguro Social Doctorado & Gnet Huma, Guadalajara 44430, Jalisco, MexicoCockwell, AE, Salisbury Dist Hosp, Wessex Reg Genet Lab, Salisbury SP2 8BJ, Wilts, England TI - FISH characterization of dynamic mosaicism involving an inv dup(15) in a patient with mental retardation AB - We report on a man with mental retardation and a complex karyotype with cells containing up to three morphologically distinct supernumerary marker chromosomes (SMCs) in most metaphases. Fluorescence in situ hybridization studies using chromosome 15-specific probes characterised the presence of seven SMCs all derived from chromosome 15. The results suggest that the patient originally had a large inv dup(15) containing two copies of the Prader-Willi/Angelman critical region which became mitotically unstable, and by a process of dynamic mosaicism various morphologically distinct SMCs arose. (C) 2001 Wiley-Liss, Inc MH - United Kingdom MH - Mexico|Jalisco PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000171752600005 L2 - dynamic mosaicism;supernumerary marker chromosome;inv dup(15);MARKER CHROMOSOMES; MOLECULAR CHARACTERIZATION; INTERSTITIAL DUPLICATIONS; PRENATAL-DIAGNOSIS; UNIPARENTAL DISOMY; TRIPLICATION; 15Q11-Q13; BREAKPOINTS; ANGELMAN; REGION SO - American Journal of Medical Genetics 2001 ;103(4):289-294 2651 UI - 14344 AU - Coelho FU AU - Martins MIR AU - de la Pena JA AD - Univ Sao Paulo, Dept Matemat IME, BR-05315970 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoCoelho, FU, Univ Sao Paulo, Dept Matemat IME, CP 66281, BR-05315970 Sao Paulo, Brazil TI - Quasitilted extensions of algebras I AB - Let A be a connected finite dimensional k-algebra, and let M be a nonzero decomposable A-module such that the one-point extension A[M] is quasitilted. We show here that every nonzero indecomposable direct summand of M is directing and A is a tilted algebra MH - Brazil MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000166812200005 L2 - quasitilted algebras;one-point extensions;directing modules;REPRESENTATION-THEORY; COMPONENTS SO - Proceedings of the American Mathematical Society 2001 ;129(5):1289-1297 2652 UI - 14525 AU - Coello CAC AU - Christiansen AD AU - Aguirre AH AD - Lab Nacl Informat Avanzada AC, Xalapa 91090, Veracruz, MexicoTulane Univ, Dept Comp Sci, New Orleans, LA 70118, USACoello, CAC, Lab Nacl Informat Avanzada AC, Xalapa 91090, Veracruz, Mexico TI - Towards automated evolutionary design of combinational circuits AB - In this paper, we propose a methodology based on a genetic algorithm (GA) to automate the design of combinational logic circuits in which we aim to minimize the total number of gates used. Our results are compared against those produced by human designers and by another GA-based approach. We also analyze the importance of using a non-binary representation in this problem despite the commonly accepted notion of universality of the binary representation in all kinds of GA-based applications. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Veracruz MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Computer Science, Hardware & Architecture;Computer Science, Interdisciplinary Applications;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0045-7906 UR - ISI:000166332200001 L2 - circuit design;optimization;genetic algorithms;computer-aided design;artificial intelligence;LOGIC SO - Computers & Electrical Engineering 2001 ;27(1):1-28 2653 UI - 11969 AU - Coello P AU - Maughan JP AU - Mendoza A AU - Philip R AU - Bollinger DW AU - Veum TL AU - Vodkin LO AU - Polacco JC AD - Univ Missouri, Dept Biochem, Columbia, MO 65211, USAUniv Missouri, Dept Anim Sci, Columbia, MO 65211, USAUniv Illinois, Dept Crop Sci, Urbana, IL 61801, USAMonsanto Co, Ankeny, IA 50021, USAGene Log Inc, Gaithersburg, MD 20878, USACoello, P, Natl Autonomous Univ Mexico, Fac Quim, Dept Bioquim, Mexico City 04510, DF, Mexico TI - Generation of low phytic acid Arabidopsis seeds expressing an E-coli phytase during embryo development AB - An Escherichia coli phytase gene was introduced into Arabidopsis plants using an embryo-specific promoter and a signal peptide for vacuolar targeting. Three independent transgenic lines were analysed. Phytase activity in dry seeds was observed in transgenic lines, whereas no activity was detected in control, untransformed seeds. Transgenic seeds expressing the phytase gene had lower levels of phytic acid than the controls. Concomitant with the decrease in phytic acid was an increase in free phosphate. These results indicated that embryo-expressed phytase can reduce the levels of phytic acid stored during development MH - Mexico|Distrito Federal MH - USA PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0960-2585 UR - ISI:000173202200002 L2 - Arabidopsis;phytase;phytic acid;Escherichia coli;ESCHERICHIA-COLI; PHOSPHATASE; PHOSPHORUS; TRANSFORMATION; THALIANA; GENE SO - Seed Science Research 2001 ;11(4):285-291 2654 UI - 13799 AU - Coello V AU - Bozhevolnyi SI AD - Ctr Invest Cient, Leon, MexicoEstudios Super Ensenada BC, Leon, MexicoUniv Aalborg, Inst Phys, DK-9220 Aalborg, DenmarkCoello, V, Ctr Invest Cient, Campus Monterrey,Apartado Postal 101-F Cd Univ Sa, Leon, Mexico TI - Experimental statistics of near-field intensity distributions at nanostructured surfaces AB - Scanning near-field optical microscopy is a technique in which the resolution is primarily determined by the size of a probe and not by the wavelength of illumination as in classical (far-field) microscopy. However, the relationship between a sample and its near-field optical image is usually rather complex. Typical factors responsible, at least partially, for such a complexity are the conditions of illumination and detection, sample characteristics (e.g. roughness and dielectric constant) and optical properties of the probe. Theoretical and experimental works conducted to improve our understanding of the relation between the object and the image have been reported (Greffet & Carminati, 1997). Recently, with the help of a photon scanning tunnelling microscope we have carried out an extensive study of the resultant near-field intensity distributions due to the elastic (in the plane) scattering of surface plasmon polaritons (SPPs) at metal film surfaces. We have also directly observed (in similar experimental conditions) localized dipolar excitations in silver colloid fractals (Bozhevolnyi et al., 1998). In both cases, the studied phenomena are intimately related to the regime of multiple light scattering, in which the interference effects are rather complicated and therefore a proper interpretation of them was far from being trivial. Thus, even though a certain understanding of many features inherent to the subwavelength light interference phenomena was gained (Bozhevolnyi & Coello, 1998; Bozhevolnyi et al., 1998; Coello & Bozhevolnyi, 1999), it is clear from the outcome of the investigations that more systematic studies in this context are still needed. A different and more powerful approach may be a statistical study of the recorded near-field intensity distributions. In this work, we report what we believe to be the first results on experimental statistics of near-field optical images exhibiting localized optical excitations (related to the regime of multiple scattering of light). We investigated optical images obtained with SPPs excited at different light wavelengths and scattered at different film surfaces, and with different polarizations and wavelengths of light scattered by silver colloid fractal structures. We have found significant differences in statistics between near-field intensity distributions taken at rough and smooth metal film surfaces and fractal structures. Finally, our predictions seem to be in agreement with theoretical studies reported by other authors (Sanchez-Gil & Garcia-Ramos, 1998) MH - Denmark MH - Mexico|Guanajuato PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Microscopy U5 - J;Article AV - English IS - 0022-2720 UR - ISI:000168378900025 L2 - near-field optics;surface plasmon polaritons;SMALL-PARTICLE COMPOSITES; OPTICAL MICROSCOPY; NUMERICAL-SIMULATION; FRACTAL CLUSTERS; LOCALIZATION; SCATTERING; EXCITATIONS SO - Journal of Microscopy-Oxford 2001 ;202():136-141 2655 UI - 12746 AU - Coetzee N AU - Blanchard K AU - Ellertson C AU - Hoosen AA AU - Friedland B AD - Univ Cape Town, Fac Hlth Sci, Dept Publ Hlth, ZA-7925 Observatory, South AfricaPopulat Council, Johannesburg, South AfricaPopulat Council, Mexico City, DF, MexicoMed Univ S Africa, Pretoria, South AfricaPopulat Council, New York, NY 10021, USACoetzee, N, Univ Cape Town, Fac Hlth Sci, Dept Publ Hlth, Anzio Rd, ZA-7925 Observatory, South Africa TI - Acceptability and feasibility of Micralax (R) applicators and of methyl cellulose gel placebo for large-scale clinical trials of vaginal microbicides AB - Objective(s): To evaluate the feasibility and acceptability of the Micralax(R) applicator and of methyl cellulose placebo gel for use in vaginal microbicide clinical trials. Design: A two-centre prospective study following women for 2 months. Setting: Two primary health care clinics in South Africa. Patients, participants: Female volunteers (n = 28) 18 years or older who were HIV negative and had no clinically detectable genital tract abnormalities or reproductive tract infections. Interventions: Participants used pre-filled Micralax(R) applicators to apply methyl cellulose gel every other day, as well as up to 1 h before to every episode of vaginal sex. Main outcome measure(s): Consistency in the weight of gel dispensed per application; side-effects attributed to applicator or gel use; and acceptability of the applicator and of the gel. Results: Over a 2 month follow-up period the 22 women completing the study reported no adverse events related to gel or applicator use. The Micralax(R) applicator proved acceptable. The gel was not too messy and did not reduce sexual frequency or pleasure. On average, the applicator dispensed 4.7 ml per use (close to the 4 ml planned). Conclusions: The Micralax(R) applicator performs well as a delivery system for potential vaginal microbicides; and methyl cellulose is an appropriate placebo for future microbicide trials. (C) 2001 Lippincott Williams & Wilkins MH - Mexico|Distrito Federal MH - South Africa MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0269-9370 UR - ISI:000171375100013 L2 - applicators;clinical trials;placebo gel;vaginal microbicides;DOUBLE-BLIND; SAFETY; HERPES SO - Aids 2001 ;15(14):1837-1842 2656 UI - 14166 AU - Cohen MG AU - Pacchiana CM AU - Corbalan R AU - Perez JEI AU - Ponte CI AU - Oropeza ES AU - Diaz R AU - Paolasso E AU - Izasa D AU - Rodas MA AU - Urrutia CE AU - Harrington RA AU - Topol EJ AU - Califf RM AD - Duke Univ, Clin Res Inst, Durham, NC, USAPontificia Univ Catolica Chile, Santiago, ChileHosp Domingo Luciani, Caracas, VenezuelaCtr Med Nacl Siglo XXI, Mexico City, DF, MexicoInst Cardiovasc Rosario, Rosario, ArgentinaClin SHAIO, Bogota, ColombiaMed Clin, Guatemala City, GuatemalaHosp Militar Cent, San Salvador, El SalvadorCleveland Clin, Cleveland, OH 44106, USACohen, MG, Hosp Italiano Buenos Aires, Serv Cardiol Intervencionista, Cervino 3670-7 Piso, RA-1425 Buenos Aires, DF, Argentina TI - Variation in patient management and outcomes for acute coronary syndromes in Latin America and North America: Results from the Platelet IIb/IIIa in Unstable Angina: Receptor Suppression Using Integrilin Therapy (PURSUIT) trial AB - Background Although more than 9500 patients have been enrolled in molar clinical trials in Latin America, practice patterns in this region have rarely been examined. We sought to compare characteristics, resource utilization, and outcomes of patients treated For acute coronary syndromes in Latin America with those in North America. Methods The Platelet IIb/IIIa in Unstable Angina: Receptor Suppression Using Integrilin Theraphy Trial (PURSUIT) enrolled 10,948 patients with non-ST-segment elevation acute coronary syndromes, including 585 in Latin America and 4358 in North America. We analyzed regional differences in patient groups, treatment patterns, and outcomes and used logistic regression analysis to identify association of enrollment region and survival. Results For patients in Latin America, the length of hospital stay was significantly longer (10 [7, 15] days vs 6 [4, 9], P<.001). Angiograms, angioplasty, and bypass surgery were significantly less common in Latin America (46.2%, 17.6%, and 11.3% vs 79.4%, 33.6%, and 19.4%, P<.001). Thirty-day death/myocardial infarction was not significantly higher, although mortality alone was significantly higher (6.8% vs 3.1%, P<.001). After adjustment for baseline characteristics, enrollment in Latin America remained on independent predictor for death at 30 days (odds ratio [OR] [95% confidence interval (CI)] 2.42 [1.60-3.67]) and persisted at 6 months (OR [95% CI] 2.5 [1.8-3.4]). Conclusions Latin American patients treated for acute coronary syndromes were managed less invasively and were twice as likely as their North American counterparts to die within 6 months. This mortality difference was not explained by imbalances in baseline risk MH - Argentina MH - Chile MH - Colombia MH - El Salvador MH - Guatemala MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 18 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-8703 UR - ISI:000167321600015 L2 - ACUTE MYOCARDIAL-INFARCTION; UNITED-STATES; GUSTO TRIAL; CANADA; CARE; ANGIOGRAPHY; THROMBOLYSIS; PREDICTORS; ELEVATION; COUNTRIES SO - American Heart Journal 2001 ;141(3):391-401 2657 UI - 12835 AU - Cohen MJ AU - Henges-Jeck C AU - Castillo-Moreno G AD - Pacific Inst Studies Dev Environm & Secur, Oakland, CA 94612, USAInst Tecnol & Etudios Super Monterrey, Guaymas 85400, Sonora, MexicoCohen, MJ, Pacific Inst Studies Dev Environm & Secur, 654 13th St, Oakland, CA 94612 USA TI - A preliminary water balance for the Colorado River delta, 1992-1998 AB - Water balances for the Colorado River mainstem complex, the Cienega de Santa Clara, and El Indio wetlands were calculated for the Colorado River delta in Mexico for the period 1992-1998. Discharge for the mainstem complex was disaggregated into flood and non-flood years, reflecting the marked variability of mainstem discharge at the Southerly International Boundary (SIB) delimiting the United States and Mexico. In non-flood years, agricultural and municipal returns to the mainstem below SIB contributed 180% of mainstem discharge at SIB, but may not be sufficient to generate the floodstage discharge required by native riparian vegetation. (C) 2001 Academic Press MH - USA MH - Mexico|Sonora PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 10 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000171097000004 L2 - Colorado River delta;water balance;hydrology;agricultural drainage;riparian vegetation;wetland vegetation;GULF-OF-CALIFORNIA; DE-SANTA-CLARA; MEXICO; WETLAND SO - Journal of Arid Environments 2001 ;49(1):35-48 2658 UI - 12249 AU - Colacot TJ AU - Qian H AU - Cea-Olivares R AU - Hernandez-Ortega S AD - Johnson Matthey, Precis Met Div, Organomet Chem & Catalysts Dev, W Deptford, NJ 08066, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoColacot, TJ, Johnson Matthey, Precis Met Div, Organomet Chem & Catalysts Dev, 2001 Nolte Dr, W Deptford, NJ 08066 USA TI - Synthesis, X-ray, spectroscopic and a preliminary Suzuki coupling screening studies of a complete series of dPPfMX(2) (M = Pt, Pd; X = Cl, Br, I) AB - A complete series of dppfMX(2) (M = Pt, Pd; X = Cl, Br, I) compounds have been synthesized using different routes, and characterized fully. The synthesis of dppfPdI, has been achieved by reacting Pd(COD)Cl-2 with dppf in the presence of NaI. X-ray structures of dppfPdBr(2) and dppfPdI(2) have also been reported for the first time in this study. A preliminary Suzuki coupling screening study reveals that dppfPdX(2), compounds are superior to the conventional Ph3P-based catalysts and bidentate phosphine-based ligands. Reactions carried out under in situ conditions also gave a similar trend, but their respective activities were much lower than that of the fully formed catalysts. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000172577800084 L2 - 1,1 '-bis(diphenylphosphino)ferrocene;Suzuki coupling;NMR;X-ray;Pt and Pd complexes of dppf;CRYSTAL; LIGAND SO - Journal of Organometallic Chemistry 2001 ;637():691-697 2659 UI - 13435 AU - Colbourn C AU - Sagols F AD - Univ Vermont, Dept Comp Sci, Burlington, VT 05405, USACINVESTAV, Dept Elect Engn, Mexico City 14000, DF, MexicoColbourn, C, Univ Vermont, Dept Comp Sci, Burlington, VT 05405, USA TI - Triangulations and a generalization of Bose's method AB - We present a nontrivial extension to Bose's method for the construction of Steiner triple systems, generalizing the traditional use of commutative and idempotent quasigroups to employ a new algebraic structure called a 3-tri algebra. Links between Steiner triple systems and 2-(v,3,3) designs via 3-tri algebras are also explored. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000169413300005 L2 - Steiner triple system;quasigroup;Latin square;Bose construction;skolem construction;triangulation SO - Discrete Mathematics 2001 ;237(1-3):97-107 2660 UI - 13250 AU - Coll P AU - Ramirez SI AU - Navarro-Gonzalez R AU - Raulin F AD - Univ Paris 07, UMR CNRS 7583, Lab Syst Atmospher, Paris, FranceUniv Paris 12, Paris, FranceUNAM, ICN, Lab Quim Plasmas & Estudios Planetarios, Mexico City, DF, MexicoColl, P, Univ Paris 07, UMR CNRS 7583, Lab Syst Atmospher, Paris, France TI - Chemical and optical behaviour of tholins, laboratory analogues of Titan aerosols AB - Since 1997, after having identified for the first time C4N2 (the only molecule detected on Titan and undetected in the laboratory at this date) in a simulated atmosphere of Titan, our group intended to determine several properties (including optical behavior) of laboratory analogues of Titan's tholins. This article summarizes the results obtained in the frame of that program (observation by microscopy, solubility in hydrocarbons and nitriles, chemical composition, and optical behavior in the 200-900nm range), and finally investigates the following items : - what are the key questions still remaining ? - how to answer them ? (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000169859700015 L2 - ORGANIC-CHEMISTRY; LOW-TEMPERATURE; ATMOSPHERE; MODEL; SIMULATIONS; GROWTH; SYSTEM; SATURN; HAZES SO - Space Life Sciences: Life in the Solar System: Prebiotic Chemistry, Chirality and Space Biology 2001 ;27(2):289-297 2661 UI - 13277 AU - Collado J AU - Lozano R AU - Johansson R AD - Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas 66451, Nuevo Leon, MexicoUniv Technol Compiegne, Ctr Rech Royallieu, Heudiasyc UMR 6599 CNRS, F-60200 Compiegne, FranceUniv Lund, Lund Inst Technol, Dept Automat Control, SE-22100 Lund, SwedenCollado, J, Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas 66451, Nuevo Leon, Mexico TI - On Kalman-Yakubovich-Popov Lemma for stabilizable systems AB - The Kalman-Yakubovich-Popov (KYP) Lemma has been a cornerstone in System Theory and Network Analysis and Synthesis. It relates an analytic property of a square transfer matrix in the frequency domain to a set of algebraic equations involving parameters of a minimal realization in time domain. This note proves that the KYP lemma is also valid for realizations which are stabilizable and observable MH - France MH - Mexico|Nuevo Leon MH - Sweden PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000169945500008 L2 - nonminimal realization;positive-real functions SO - Ieee Transactions on Automatic Control 2001 ;46(7):1089-1093 2662 UI - 13599 AU - Colmenares F AU - McCaffrey JG AU - Novaro O AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoNatl Univ Ireland, Dept Chem, Maynooth, Kildare, IrelandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoColmenares, F, Natl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Quenching of excited P-1(1) state atomic zinc by molecular nitrogen: A matrix-isolation spectroscopy/quantum chemical calculation study AB - A concentration study is used to identify the optical absorption of zinc atoms isolated in solid nitrogen. Photoexcitation of the threefold-split, atomic 4p P-1(1) singlet absorption band did not produce any emission from either the singlet or triplet states. Hartree-Fock (relativistic effective core potentials) plus variational and multireference perturbational configuration-interaction calculations are performed to analyze this very efficient quenching of excited state atomic zinc by molecular nitrogen. Of the two geometries considered in energy calculations of the approach of Zn(P-1(1)) to N-2, the collinear exhibited a slightly greater stabilization than the perpendicular approach. However, the collinear is identified as of no significance in the excited state quenching due to the absence of low energy crossings with the ground state. In contrast, for the perpendicular approach a crossing between the repulsive ground (1)A(1)(S-1(0)) state and the strongly attractive B-1(2)(P-1(1)) state occurs close to the energy minimum of the B-1(2) state. The efficiency of crossing between these states is analyzed in the framework of one-dimensional Landau-Zener (LZ) theory. A hopping probability of 0.07 is obtained for a single crossing, considered important in a rapidly relaxing solid state system, such as present in a low temperature matrix. Crossings found between the repulsive B-3(1)(P-3(1)) and (3)A(1)(P-3(1)) states with the strongly bound B-1(2)(P-1(1)) state are expected to play a role in gas phase Zn(P-1(1)) quenching leading to the production of Zn(P-3(J)) states. LZ calculations indicate a small hopping probability for these crossings, consistent with the small P-1(1)--> P-3(J) quenching cross sections observed in the gas phase work. (C) 2001 American Institute of Physics MH - Ireland MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000168998000028 L2 - RELATIVISTIC EFFECTIVE POTENTIALS; SPIN-ORBIT OPERATORS; RARE-GAS SOLIDS; ELECTRONIC STATES; CROSS-SECTIONS; CLUSTERS; ZNAR; WAVEFUNCTIONS; RELAXATION; MECHANISM SO - Journal of Chemical Physics 2001 ;114(22):9911-9918 2663 UI - 14245 AU - Colpi M AU - Geppert U AU - Page D AU - Possenti A AD - Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, ItalyAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsservatorio Bologna, I-40127 Bologna, ItalyColpi, M, Univ Milano Bicocca, Dipartimento Fis, Piazza Sci 3, I-20126 Milan, Italy TI - Charting the temperature of the hot neutron star in a soft X-ray transient AB - We explore the thermal evolution of a neutron star undergoing episodes of intense accretion, separated by long periods of quiescence. By using an exact cooling code, we follow in detail the flow of heat in the star due to the time-dependent accretion-induced heating from pycnonuclear reactions in the stellar crust, to the surface photon emission, and to the neutrino cooling. These models allow us to study the neutron stars of the soft Xray transients. In agreement with recent work of Brown, Bildsten, & Rutledge, we conclude that the soft component of the quiescent luminosity of Aql X-1, of 4U 1608-522, and of the recently discovered SAX J1808.4 can be understood as thermal emission from a cooling neutron star with negligible neutrino emission. However, we show that, in the case of Cen X-4, despite its long recurrence time, strong neutrino emission from the neutron star inner core is necessary to understand the observed low ratio of quiescent to outburst luminosity. This result implies that the neutron star in Cen X-4 is heavier than the one in the other systems and the pairing critical temperature in its center must be low enough (well below 10(9) K) to avoid a strong suppression of the neutrino T-c emission MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000167208100015 L2 - dense matter;stars : individual (4U 1608-522, Aquila X-1;Centaurus X-4, EXO 0748-676, Rapid Burster 1730-335, SAX J1808.4-3658);stars : neutron;X rays : stars;LIQUID-METAL PHASE; DENSE MATTER; THERMAL-CONDUCTIVITIES; RADIO PULSARS; EQUATION; CRUST; MASS; EQUILIBRIUM; EVOLUTION SO - Astrophysical Journal 2001 ;548(2):L175-L178 2664 UI - 12116 AU - Conroy VCJ AU - Hortelano Y AU - Cervantes FA AU - Cook JA AD - Natl Autonomous Univ Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoUniv Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK, USAUniv Alaska Museum, Fairbanks, AK, USAConroy, VCJ, Stanford Univ, Dept Biol Sci, 371 Serra Mall, Stanford, CA 94305 USA TI - The phylogenetic position of southern relictual species of Microtus (Muridae : Rodentia) in North America AB - Climatic fluctuation led to isolation of some populations of temperate species on southern mountaintops during warming trends. The most southern species of arvicoline rodents (Microtus guatemalensis, M. oaxacensis, M. quasiater and M. umbrosus) in North America may be relicts, isolated in the mountains of Mexico and Guatemala at the end of the Pleistocene. We used parsimony and likelihood analyses of complete mitochondrial cytochrome b gene sequences of 28 species of Microtus, including eight Eurasian species, holarctic M. oeconomus, and all extant North American species except the island endemic M. brewed. North American species of Microtus were monophyletic under the maximum-Likelihood criterion, but polyphyletic under parsimony. Likelihood ratio tests and bootstrapping indicated a rapid basal radiation with short intervals between cladogenic events. However, several sister taxon relationships were robust to bootstrapping or consistent between methods. We found that M. quasiater was sister to M. pinetorum, and these taxa were sister to a clade of M. oaxacensis and M. guatemalensis. The phylogenetic position of M. umbrosus, however, was unclear. Monophyly of the relicts was rejected by a likelihood ratio test, suggesting multiple southern invasions by arvicoline rodents. Phylogenetic data for these and other co-distributed taxa should be used in conservation efforts for these remote areas MH - USA MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Zoology U5 - J;Article AV - English IS - 1616-5047 UR - ISI:000172787500002 L2 - Microtus;Arvicolinae;historical biogeography;conservation;molecular systematics;Mexico;MOLECULAR SYSTEMATICS; MAMMALS; LIKELIHOOD; DNA; PHYLOGEOGRAPHY; FLUCTUATIONS; SAURIA; MEXICO; CLOCK SO - Mammalian Biology 2001 ;66(6):332-344 2665 UI - 12617 AU - Cons-Molina F AU - De la Pena P AU - Morales J AU - Briseno A AU - Gonzalez G AU - Guerrero G AU - Ramirez N AU - Escobar A AD - Mexican Grp Study Osteoporosis, Mexicali, Baja California, MexicoMexican Grp Study Osteoporosis, Leon, SpainMexican Grp Study Osteoporosis, Guadalajara, SpainMexican Grp Study Osteoporosis, Merida, VenezuelaMexican Grp Study Osteoporosis, Monterrey, MexicoMexican Grp Study Osteoporosis, Hermosillo, Sonora, MexicoMexican Grp Study Osteoporosis, Tijuana, Mexico TI - Menopause index (I-m) in Mexican women: Densitometric indicator of postmenopausal bone loss MH - Mexico|Baja California MH - Mexico|Nuevo Leon MH - Mexico|Sonora MH - Spain MH - Venezuela PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 8756-3282 UR - ISI:000171139900068 SO - Bone 2001 ;29(3):310-311 2666 UI - 12645 AU - Constantino M AU - Christian P AU - Marina CF AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoCSIRO Entomol, Canberra, ACT 2601, AustraliaCtr Invest Paludismo, Tapachula 30700, MexicoWilliams, T, ECOSUR, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - A comparison of techniques for detecting Invertebrate iridescent virus 6 AB - The aim of this study was to compare the sensitivity and precision of various methods for the detection and quantification of Invertebrate iridescent virus 6 (IIV-6) (Iridoviridae) isolated from a the stem-boring moth Chilo suppressalis, and to apply these techniques to the detection of covert infections in the wax moth, Galleria mellonella. The relationship between the virus concentration and absorbance at 260 nm was linear over the range of 1.6 x 10(9)-5.6 x 10(10) particles/ml. TCID50 assays using 12 different cell lines indicated that two Drosophila lines, DL2 and DR1, had the highest susceptibility whereas cell lines from Aedes albopictus and Plutella xylostella were four orders of magnitude less sensitive. TCID50 values for IIV-6 in Spodoptera frugiperda Sf9 cells gave the particle-infectivity ratios of 15-64 virus particles/IU. An insect bioassay involved injecting doses of 1-100 IIV-6 particles into the third instar G. mellonella larvae. The prevalence of patent infection was 20-26% at a dose of I particle per larva rising to 86-92% at 10 particles and 100% at doses of 50 or 100 particles. Of the insects that survived to adulthood, between 5.8 and 75% caused patent infections when injected into G. mellonella larvae, indicating that they were covertly infected. A PCR technique resulted in 95% detection at 1000 virus particles per insect. Of the insects that proved positive for covert infection by insect bioassay, 41% also proved positive by PCR analysis. It is concluded that the G. mellonella bioassay is highly reliable for detection of doses of 10 particles or more and for determining the relative activity of IIV-6 preparations at doses as low as 1 particle per insect. PCR had a slightly lower sensitivity followed by the insect cell culture assay. (C) 2001 Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Chiapas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Biochemical Research Methods;Biotechnology & Applied Microbiology;Virology U5 - J;Article AV - English IS - 0166-0934 UR - ISI:000171576700002 L2 - detection of inapparent infections;insect bioassay;PCR;cell culture assay;NUCLEAR POLYHEDROSIS-VIRUS; CELL-LINES; IRIDOVIRUS INFECTION; REPLICATION; LARVAE SO - Journal of Virological Methods 2001 ;98(2):109-118 2667 UI - 13913 AU - Contreras-Puente G AU - Vigil-Galan O AU - Vidal-Larramendi J AU - Cruz-Gandarilla F AU - Hesiquio-Garduno M AU - guilar-Hernandez J AU - Cruz-Orea A AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07360, DF, MexicoUniv La Habana, IMRE, Fac Fis, La Habana 43100, CubaContreras-Puente, G, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Influence of the growth conditions in the properties of the CdTe thin films deposited by CSVT AB - We present in the results of this work, the influence of oxygen and the gradient of temperature in the processing of CdTe thin films, by using the close space vapor transport (CSVT) technique. In general the kinetic process is strongly influenced by these parameters; where a reduction in the growth rate, grain size; an increase in the intergrain barrier height; and structural changes are present. (C) 2001 Published by Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000168013900015 L2 - CdTe thin films;close space vapor transport;growth conditions;PHOTOLUMINESCENCE; CELLS SO - Thin Solid Films 2001 ;387(1-2):50-53 2668 UI - 12734 AU - Contreras G AU - Lopes AO AU - Thieullen P AD - CIMAT, Guanajuato 36000, MexicoURFGS, Inst Matemat, BR-91501970 Porto Alegre, RS, BrazilUniv Paris Sud, Dept Math, F-91405 Orsay, FranceContreras, G, CIMAT, POB 402, Guanajuato 36000, Mexico TI - Lyapunov minimizing measures for expanding maps of the circle AB - We consider the set of maps f is an element of Falpha+ = boolean OR C-beta > alpha(1+beta) of the circle which are covering maps of degree D, expanding, min(x is an element of S1) f'(x) > 1 and orientation preserving. We are interested in characterizing the set of such maps f which admit a unique f-invariant probability measure A minimizing f In f'd mu over all f-invariant probability measures. We show there exists a set G(+) subset of Falpha+, open and dense in the C1+alpha-topology, admitting a unique minimizing measure supported on a periodic orbit. We also show that, if f admits a minimizing measure not supported on a finite set of periodic points, then f is a limit in the C1+alpha-topology of maps admitting a unique minimizing measure supported on a strictly ergodic set of positive topological entropy. We use in an essential way a sub-cohomological equation to produce the perturbation. In the context of Lagrangian systems, the analogous equation was introduced by R. Mane and A. Fathi extended it to the all configuration space in [8]. We will also present some results on the set of f-invariant measures A maximizing integral A d mu for a fixed C-1-expanding map f and a general potential A, not necessarily equal to -ln f' MH - Brazil MH - France MH - Mexico|Guanajuato PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 27 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0143-3857 UR - ISI:000171413200006 L2 - LAGRANGIAN SYSTEMS; DIMENSION SO - Ergodic Theory and Dynamical Systems 2001 ;21():1379-1409 2669 UI - 12867 AU - Contreras J AU - Scholz CH AD - Ctr Invest Cient & Educ Super Ensenada, Dept Geol, Ensenada 22860, Baja California, MexicoColumbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964, USAContreras, J, Ctr Invest Cient & Educ Super Ensenada, Dept Geol, Km 107 Carretera Tijuana, Ensenada 22860, Baja California, Mexico TI - Evolution of stratigraphic sequences in multisegmented continental rift basins: Comparison of computer models with the basins of the East African rift system AB - This article presents a series of numerical simulations of the stratigraphic evolution of continental rift basins. We model the geomorphic and tectonic processes acting in this depositional environment, which contrasts with the traditional approach of modeling the settling of sediments, especially in marine clastic basins. What is new in our model is that it can simulate the formation of basins with linked half grabens, which is a fundamental feature of rift systems. The attributes of the numerical simulations such as the overall morphology, basin architecture, drainage systems, and stratigraphy are in good agreement with digital elevation models and reflection seismic fines of the basins of the East African rift system, specifically the Tanganyika and Malawi rifts MH - Mexico|Baja California MH - USA PB - TULSA: AMER ASSOC PETROLEUM GEOLOGIST RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-1423 UR - ISI:000171119900002 L2 - NORMAL FAULTS; EXTENSIONAL BASINS; TRANSFER ZONES; LAKE MALAWI; GROWTH; GEOMETRY; DISPLACEMENT SO - Aapg Bulletin 2001 ;85(9):1565-1581 2670 UI - 14359 AU - Contreras MAL AU - Zinman EH AU - Kaplan SK AD - Univ Tecnol Mexico, Sch Dent, Mexico City, DF, MexicoUNAM, ENEPI, Mexico City, DF, MexicoNova SE Univ, Coll Dent Med, Dept Endodont, Ft Lauderdale, FL 33314, USAContreras, MAL, Norte 81-A 424,Colonia Electm,Delegac Azcapotzalco, Mexico City 02060, DF, Mexico TI - Comparison of the first file that fits at the apex, before and after early flaring AB - The purpose of this study was to compare the first file that fits to the apex (FFFA) in each canal before and after early flaring to analyze if the size of file to fit to the apex would increase after flaring. One hundred mesial canals of lower first and second molars with complete apical formation and patent foramens were selected. The samples were randomly divided into two groups of 50 canals each. A file was fit to the apex in each canal and that size recorded. Radicular faring was completed using Gates-Glidden drills in group 1 and Rapid Body Shapers in group 2. After flaring a file was again fit to the apex in the same manner as before and its size recorded, The mean diameter of FFFA before flaring (file diameters in mm x 10(-2)) was 14.46 (+/-4.12) and after 23.3 (+/-7.2) for group 1 (p < 0.001), whereas in group 2 the mean diameter of FFFA was 17.2 (+/-4.96) before and 25.6 (+/-6.36) after (p < 0.001), A Wilcoxon t test indicates a significant difference (p < 0.001) between the diameter of FFFA before and after flaring in both groups. The increase in diameter was approximately two file sizes for both groups, From this observation it is concluded that early radicular flaring increases the sire file that is snug at the apex, and awareness of that difference gives the clinician a better sense of canal size. Early flaring of the canal provides better apical size information and with this awareness, a better decision can be made concerning the appropriate final diameter needed for complete apical shaping MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0099-2399 UR - ISI:000166748800011 L2 - BIOMECHANICAL PREPARATION; CURVED CANALS; INSTRUMENTATION SO - Journal of Endodontics 2001 ;27(2):113-116 2671 UI - 12890 AU - Contreras R AU - Grevy JM AU - Garcia-Hernandez Z AU - Guizado-Rodriguez M AU - Wrackmeyer B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62000, Morelos, MexicoUniv Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyContreras, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - Aminodiphenylphosphanes: Isotope-induced chemical shifts (1)Delta N-14/15(P-31), coupling constants (1)J(P-31, N-15), and chemical shifts delta N-15 and delta P-31 AB - A series of aminodiphenylphosphanes 1 [Ph2P-N(H)tBu (a), -NEt2 (b), -NiPr2 (c)], 2 [Ph(2)PPi NHPh (a), -NH-2-pyridine (b), -NH-3-pyridine (c), -NH-4-pyridine (d), NH-pyrimidine (e), NH-2,6-Me-2-C6H3 (f), NH-3-Me-2-pyridine (g)], 3 [Ph2P-N(Me)Ph (a), -NPh2 (b)], and N-pyrrolyldiphenylphosphane 4 (Ph2P-NC4H4) was prepared and studied by NMR (H-1, C-13, P-31 N-15 NMR) spectroscopy. The isotope-induced chemical shifts (1)Delta N-14/15(P-31) were determined at natural abundance of N-15 by using HEED INEPT experiments. A dependence of (1)Delta N-14/15(P-31) on the substituents at nitrogen was found (alkyl < H < aryl; increasingly negative values). The magnitude and sign of the coupling constants (1)J(P-31,N-15) (positive sign) are dominated by the presence of the lone pair of electrons at the phosphorus atom. The X-ray structural analysis of 2b is reported, showing the presence of dieters owing to intermolecular hydrogen bridges in the solid state. (C) 2001 John Wiley & Sons, Inc MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1042-7163 UR - ISI:000171007300015 L2 - EXTENDED PULSE SEQUENCES; MULTINUCLEAR MAGNETIC-RESONANCE; POLARIZATION TRANSFER; SIGN DETERMINATION; NATURAL-ABUNDANCE; PHOSPHORUS COMPOUNDS; P-31 NMR; ENHANCEMENT; LIGANDS; C-13 SO - Heteroatom Chemistry 2001 ;12(6):542-550 2672 UI - 12733 AU - Cooper WE AU - Lemos-Espinal JA AD - Indiana Univ Purdue Univ, Dept Biol, Ft Wayne, IN 46805, USAEscuela Nacl Estudios Profes, Ecol Lab, Unidad Biol Tecnol & Prototypos, Iztacala, MexicoCooper, WE, Indiana Univ Purdue Univ, Dept Biol, Ft Wayne, IN 46805, USA TI - Coordinated ontogeny of food preference and responses to chemical food stimuli by a lizard Ctenosaura pectinata (Reptilia : Iguanidae) AB - When important ecological factors change predictably during the life of an organism, the ontogeny of related behaviors must be timed to maintain appropriate behavioral responsiveness to current ecological conditions. In the brown iguana, Ctenosaura pectinata, hatchlings in natural populations eat primarily insects, consuming little plant matter, whereas adults eat primarily plants, consuming some insects as well. We conducted laboratory experiments on diet preferences and responses to chemical cues that the lizards sampled by tongue-flicking and used to identify food. All hatchlings ate crickets, but only one of six ate romaine lettuce. They responded strongly to chemical cues from prey, as indicated by elevated tongue-flick rates, but not from romaine lettuce. All older individuals ate both crickets and romaine lettuce. They responded much more strongly to chemical cues from both crickets and romaine lettuce than to control chemicals, as indicated by higher proportions of individuals that bit and higher tongue-flick attack scores. Thus, an ontogenetic change to increased responsiveness to plant chemical stimuli was coordinated with an ontogenetic change to an herbivorous diet. The mechanisms underlying these ontogenetic changes are unknown, but folivory may be unprofitable before juveniles acquire intestinal flora that degrade cellulose by ingestion of feces of adult conspecifics. Possible mechanisms are discussed, including the detection of chemical cues from appropriate food plants during consumption of feces from older individuals. Studies of other squamate reptiles suggest that exposure to these chemicals might affect both future responsiveness to the chemical cues and a tendency to eat the corresponding plants MH - Mexico|Estado De Mexico MH - USA PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0179-1613 UR - ISI:000171378300006 L2 - HERBIVOROUS LIZARD; CORRELATED EVOLUTION; DIPSOSAURUS-DORSALIS; BEHAVIORAL-RESPONSES; SQUAMATE REPTILES; TONGUE-FLICKING; FORAGING MODE; PREY; DISCRIMINATION; DIET SO - Ethology 2001 ;107(7):639-653 2673 UI - 13281 AU - Cordero S AU - Rojas F AU - Riccardo JL AD - Univ Autonoma Metropolitana Azcapotzalco, Dept Quim, Mexico City 09340, DF, MexicoUNAM, Inst Fis, Queretaro 76001, Queretaro, MexicoUniv Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaRojas, F, Univ Autonoma Metropolitana Azcapotzalco, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Simulation of three-dimensional porous networks AB - Simulation of porous networks, with characteristics similar to those of real media, is essential for the study of capillary processes that take place within these substrata. The dual site-bond model (DSBM) provides a theoretical basis from which it is possible to adequately describe and simulate porous networks of diverse structural properties. Following the DSBM principles, heterogeneous 3-D cubic porous networks have been built by a Monte Carlo method. The desired topological properties of these substrata have been introduced by considering: (i) different sizes of the Void entities (sites or cavities and bonds or throats); (ii) different connectivities (C) of the pore elements with their neighbours, i.e. the number of throats (bonds) that surround and connect a. pore cavity (site) with its homologous entities is not constant throughout the network; (iii) geometrical restrictions, in the sense that the sizes of the bonds that meet into a site must be of such values as to avoid any mutual interference. The overlapping (Omega) between the site and bond distribution functions, the connectivity (C) and the geometrical restrictions (G), are the three fundamental factors that promote segregation effects in the substrate. For regular networks (i.e. those of constant C) subjected to G and high Omega, it is found that big sites: (i) prefer big bonds as neighbours, and (ii) are less affected by geometrical restrictions than small ones. In turn, for irregular networks of varying C subjected to G and large Omega it is found that: (i) the smallest sites are linked to the biggest possible bonds thus acquiring a low connectivity, and (ii) the biggest sites adopt the maximum possible connectivity and allocate small and medium size bonds rather than large ones. All these particularities strongly influence the topology of a porous network and hence the repartition of fluids inside the pores during a capillary process. (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000169951000038 L2 - simulation of 3-D porous networks;topologically heterogeneous substrata;variable connectivity;dual site-bond model;size and connectivity segregation effects in porous media;MERCURY POROSIMETRY; CAPILLARY PROCESSES; MEDIA; MODEL; DRAINAGE; PACKING SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2001 ;187():425-438 2674 UI - 14066 AU - Cordero S AU - Rojas F AU - Kounhauser I AU - Riccardo JL AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76001, MexicoUniv Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaCordero, S, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Sorption characteristics and visualization of the state of porous entities in simulated porous networks AB - Cubic porous networks are computer simulated by a Monte Carlo method implemented under the premises of the Dual Site-Bond Model of complex media. Topological properties of the networks (size and connectivity) are visualized from cross-sectional planes of the substrata. Sorption characteristics of these media are evidenced through their hysteresis loops. Visualization of the state (liquid or vapour-filled) of porous entities during a particular sorption process is made directly from cross-sectional planes of the porous media or indirectly from domain complexion diagrams MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 1434-5021 UR - ISI:000167654000018 L2 - porous materials;porous networks;sorption SO - Granular Matter 2001 ;3(1-2):97-100 2675 UI - 13275 AU - Cordoba-Jabonero C AU - De Carcer IA AU - Barboza-Flores M AU - Jaque F AD - CSIC, INTA, CAB, Ctr Astrobiol, Madrid, SpainUniv Autonoma Madrid, Dept Fis Mat, Madrid, SpainUniv Sonora, Ctr Invest Fis, Hermosillo, Sonora, MexicoCordoba-Jabonero, C, CSIC, INTA, CAB, Ctr Astrobiol, Plaza Murillo 2, Madrid, Spain TI - Solar ultraviolet-B detectors using Eu2+ doped alkali halide crystals AB - The continuous depletion of the ozone layer causes an increase in the ultraviolet-B (UV-B) reaching the Earth's surface. In this paper the behaviour of the KCl:Eu2+ under solar UV irradiation has been investigated. Considering the thermoluminescence (TL) excitation spectra, the geometrical solar radiation parameters (solar zenith angle related to the light path) and the atmosphere characteristics (ozone content, Rayleigh scattering and aerosols' concentration), the solar UV irradiation Aux registered by the dosimeter has been simulated throughout the day. This modelled hourly signal agrees with the measured TL signal at different hours. Moreover, these curves throughout the day are compared to the convoluted signal obtained from a gaussian curve centred at different UV-C wavelengths and the same solar spectrum. This comparison supports the idea that the KCl:Eu2+ crystal behaves under the sun as a narrow band gaussian detector centred at about 265 nm, but with the main registered solar UV-B signal at 285 nm. On the other hand, a comparison of the KCl:Eu2+ system with commercially available broad band UV-B biological sensors (biometers), shows that the europium doped crystals are more sensitive to minor changes of the solar UV-B flux and therefore, it is a good instrument for the study of small ozone layer depletions. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000169967300186 L2 - thermoluminescence dosimetry;solar UV radiation;Eu2+ doped alkali halide crystals;UV biosensors;environmental applications;ACTINIC REGION; THERMOLUMINESCENCE; DOSIMETRY; RADIATION; IRRADIATION; KCL-EU2+; OZONE SO - Journal of Alloys and Compounds 2001 ;323():847-850 2676 UI - 13609 AU - Cordonet A AU - Lima R AU - Ramos E AD - CNRS Marseille Luminy, Ctr Phys Theor, Marseille 09, FranceUASLP, IICO, San Luis Potosi 78210, MexicoUniv Nacl Autonoma Mexico, Lab Energia Solar IIM, Temixco 62580, Morelos, MexicoCordonet, A, CNRS Marseille Luminy, Ctr Phys Theor, Case 907, Marseille 09, France TI - Two models for the dynamics of boiling in a short capillary tube AB - We investigate the dynamical origin of the statistical properties of boiling in a short capillary tube. Two different models are proposed (Markov model and rotational model). We show that the behavior of each model may be related to different properties of the physical phenomenon. We conclude with a suggestion of a new experimental measurement which can help to adjust several aspects of the models. (C) 2001 American Institute of Physics MH - France MH - Mexico|Morelos MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000168997200006 SO - Chaos 2001 ;11(2):344-350 2677 UI - 12430 AU - Corichi A AU - Nucamendi U AU - Sudarsky D AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sussex, Ctr Theoret Phys, Brighton BN1 9QJ, E Sussex, EnglandCorichi, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - Mass formula for Einstein-Yang-Mills solitons AB - The isolated horizon formalism, together with a simple phenomenological model for colored black holes was recently used to predict a formula for the ADM mass of the solitons of the EYM system in terms of horizon properties of black holes for all values of the horizon area. In this Brief Report, this formula, is tested numerically-up to a large value of the area-for spherically symmetric solutions and shown to yield the known masses of the solitons MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000172074100075 L2 - COLORED BLACK-HOLES; ISOLATED HORIZONS; EQUATIONS; HAIR; MECHANICS; EXISTENCE SO - Physical Review D 2001 ;6410(10): 2678 UI - 12519 AU - Cormack IG AU - Sibbett W AU - Ortega-Martinez R AU - Reid DT AD - Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandUNAM, Ctr Instrumentos, Lab Opt Aplicada, Coyoacan 14020, DF, MexicoHeriot Watt Univ, Dept Phys, Ultrafast Opt Grp, Edinburgh EH14 4AS, Midlothian, ScotlandCormack, IG, Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland TI - Ultrashort pulse characterization using a scanning Fabry-Perot etalon enabling rapid acquisition and retrieval of a sonogram at rates up to 1.52 Hz AB - Rapid characterization of ultrashort pulses has been demonstrated by measuring a two-photon absorption sonogram trace. The use of a scanning Fabry-Perot frequency filter has made it possible to acquire and retrieve a sonogram at rates as high as 1.52 Hz. We discuss details of the experimental setup, including the synchronization electronics and the acquisition/retrieval software. Excellent agreement is obtained between retrieved pulse data and independent experimental pulse measurements. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000171797000006 L2 - LASER-PULSES; GENERALIZED PROJECTIONS; 2-PHOTON ABSORPTION; LIGHT-PULSES; PHASE; AMPLITUDE; AUTOCORRELATION; DEVICES SO - Review of Scientific Instruments 2001 ;72(11):4071-4079 2679 UI - 12337 AU - Corona-Rivera JR AU - Corona-Rivera E AU - Rornero-Velarde E AU - Hernandez-Rocha J AU - Bobadilla-Morales L AU - Corona-Rivera A AD - Univ Guadalajara, Lab Genet Humana & Clin Asesoramiento Genet, Carrera Med, Ctr Ciencias Salud, Guadalajara 44340, Jalisco, MexicoHosp Civil Guadalajara Dr Juan I Menchaca, Div Pediat, Hosp Escuela, Unidad Estudios Nutr Infantil, Guadalajara, SpainHosp Civil Guadalajara Dr Juan I Menchaca, Div Pediat, Hosp Escuela, Serv Neurol Pediat, Guadalajara, SpainCorona-Rivera, JR, Univ Guadalajara, Lab Genet Humana & Clin Asesoramiento Genet, Carrera Med, Ctr Ciencias Salud, Sierra Mojada 950, Guadalajara 44340, Jalisco, Mexico TI - Report and review of the fetal brain disruption sequence AB - The fetal brain disruption sequence (FBDS), a rare cause of extreme microcephaly, is described in a patient and compared with 19 previously reported cases. Clinical findings present in almost all patients included: severe microcephaly (average occipitofrontal circumference -5.8 SD), overlapping sutures, prominent occipital bone, scalp rugae with normal hair patterning and marked neurological impairment. Early death occurred in 7/20 cases. The FBDS was sporadic in 17 out of 19 reported cases supporting a low recurrence risk for genetic counselling purposes. A group of related observations in cases were thromboembolic phenomenon following death of the co-twin. vascular and/or haematological involvement by prenatal cytornegalovirus infection, prenatal cocaine exposure, direct vascular fetal trauma (cordocentesis) and fetal vascular changes after a maternal car accident causing intracranial bleeding and brain damage. Normal scalp hair pattern in all cases and the second or third trimester location of the disruptive event in two cases suggest that in the FBDS, brain growth is normal throughout the first 18 weeks of gestation at least. Conclusion: pathogenic factors suggest that different forms of vascular injury to the fetal brain (emboli, haemorrhage, vasoconstriction, disseminated intravascular coagulation) can produce partial brain destruction, diminished intracranial pression and skull collapse in the fetal brain disruption sequence MH - Mexico|Jalisco MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Pediatrics U5 - J;Article AV - English IS - 0340-6199 UR - ISI:000172357400007 L2 - aprosencephaly;atelencephaly;central nervous system;hydranencephaly;microcephaly;VASCULAR DISRUPTION SO - European Journal of Pediatrics 2001 ;160(11):664-667 2680 UI - 14502 AU - Coronado-Quintana JA AU - McClaran MP AD - Univ Sonora Reforma & Colosio, Hermosillo 83100, Sonora, MexicoUniv Arizona, Tucson, AZ 85721, USACoronado-Quintana, JA, Univ Sonora Reforma & Colosio, Hermosillo 83100, Sonora, Mexico TI - Range condition, tenure, management, and bio-phyiscal relationships in Sonora, Mexico AB - The objective of this study was to describe the relationship among range condition scores, tenure system, management practices and bio-physical variables for 107 communal ejido ranches and 373 private ranches in Sonora, Mexico. The data was obtained from assessments of range condition and recommended carrying capacity for individual ranch units that were completed between 1973 and 1993 by the Comision Tecnica para la Determinacion de Coeficientes de Agostadero. Variables measured were range condition, land tenure (communal ejido or private ranch), management characteristics (human density, livestock stocking rate, ranch size, and infrastructure condition), and bio-physical characteristics (rangeland site quality and precipitation in the year of assessment). We used a combination of simple, univariate chi-square analyses and more complex, multivariate ordered logistic regression analyses to assess the relationships among these variables. There was no evidence from the logistic regression analysis that range condition of ranches in Sonora was related to the ejido or private tenure systems. Infrastructure condition was different between the 2 tenure systems, and infrastructure condition was positively related to range condition for both ejido and private ranches. Based on the univariate and multivariate analyses, precipitation amounts in the year of assessment was less for private ranches, and range condition on private ranches was more sensitive to precipitation than ejido ranches. Compared to estimates made in the 1960's and 1970's in other parts of Mexico, we found there to be less of a difference in stocking rate between the more lightly stocked private ranches and more heavily stocked ejido ranches, and generally good condition infrastructure on all ranches. The important relationship between precipitation and range condition implies that range condition assessments should be done over many years to produce estimates of trend that can be compared across wet and dry years MH - Mexico|Sonora MH - USA PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 0022-409X UR - ISI:000166411500006 L2 - communal resources;ejido;infrastructure;precipitation;COMMONS SO - Journal of Range Management 2001 ;54(1):31-38 2681 UI - 13491 AU - Corsi-Cabrera M AU - Perez-Garci E AU - Del Rio-Portilla Y AU - Ugalde E AU - Guevara MA AD - UNAM, Fac Psicol, Mexico City 04510, DF, MexicoUniv Guadalajara, Inst Neurociencias, Guadalajara, SpainCorsi-Cabrera, M, UNAM, Fac Psicol, Av Univ 3004,Copilco Univ, Mexico City 04510, DF, Mexico TI - EEG bands during wakefulness, slow-wave, and paradoxical sleep as a result of principal component analysis in the rat AB - Rat EEG has been empirically divided in bands that frequently do not correspond with EEG generators nor with the functional meaning of EEG rhythms. Power spectra from wakefulness (W), slow-wave sleep (SWS), and paradoxical sleep (PS) of Wistar rats were submitted to Principal Component Analyses (PCA) to investigate which frequencies are covariant. Three independent eigenvectors were identified for SWS: a band between 1-6, an intermediate band between 7-15, and a fast band between 16-32 Hz (90.74% of the variance); two independent eigenvectors were extracted for PS: slow frequencies between 1-6 covarying together with frequencies between 11-16 Hz, and activity between 6-10 covarying together with fast frequencies between 17-32 Hz (80.38% of the variance); four eigenvectors were obtained for W: 3-7, 8-9, 10-21 and 21-32 Hz (81.47% of the variance). Vigilance states showed significant differences in AP from 1 to 22 Hz. PCA extracted broad bands different for each vigilance state, which included the most representative EEG activities characteristic of them. These results indicate that during SWS, slow oscillations include frequencies up to 6 Hz, and spindle oscillations frequencies down to 7 Hz. No alpha frequencies were identified as an independent band. Frequencies within theta and beta were gathered in the same eigenvector during PS and in different eigenvectors during W suggesting coordinated activation of hippocampal and cortical systems during PS. These bands are consistent with the underlying neurophysiological mechanisms of sleep and wakefulness and with firing frequencies of generators of rhythmic activity obtained in cellular studies in animals MH - Mexico|Distrito Federal MH - Spain PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 9 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0161-8105 UR - ISI:000169184800002 L2 - EEG;spectral analysis;rat;NREM sleep;REM sleep;wakefulness;principal component analysis;EYE-MOVEMENT SLEEP; FREELY MOVING RAT; THETA-RHYTHM; CORTICAL TEMPERATURE; VIGILANCE STATES; POWER SPECTRA; DEPRIVATION; BEHAVIOR; FREQUENCY; ELECTROCORTICOGRAM SO - Sleep 2001 ;24(4):374-380 2682 UI - 10902 AU - costa-Gallegos JA AU - Ibarra-Perez FJ AU - Rosales-Serna R AU - Cazares-Enriquez B AU - Fernandez-Hernandez P AU - Castillo-Rosales A AU - Kelly JD AD - INIFAP, Bean Program, Chapingo 56230, Estado De Mexic, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Apartado Postal 10, Chapingo 56230, Estado De Mexic, Mexico TI - Registration of 'Bayacora' pinto bean MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000176236800049 L2 - COLLETOTRICHUM-LINDEMUTHIANUM SO - Crop Science 2001 ;41(5):1645-1646 2683 UI - 10903 AU - costa-Gallegos JA AU - Ibarra-Perez FJ AU - Rosales-Serna R AU - Castillo-Rosales A AU - Kelly JD AD - INIFAP, Bean Program, Chapingo 56230, Estado De Mexic, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Apartado Postal 10, Chapingo 56230, Estado De Mexic, Mexico TI - Registration of 'Negro Sahuatoba' opaque black bean MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000176236800050 L2 - COLLETOTRICHUM-LINDEMUTHIANUM SO - Crop Science 2001 ;41(5):1646-1647 2684 UI - 10904 AU - costa-Gallegos JA AU - Ibarra-Perez FJ AU - Rosales-Serna R AU - Castillo-Rosales A AU - Cazares-Enriquez B AU - Fernandez-Hernandez P AU - Kelly JD AD - INIFAP, Bean Program, Chapingo 56230, Estado De Mexic, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Apartado Postal 10, Chapingo 56230, Estado De Mexic, Mexico TI - Registration of 'Negro Altiplano' common bean MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000176236800054 SO - Crop Science 2001 ;41(5):1650-1650 2685 UI - 10905 AU - costa-Gallegos JA AU - Ibarra-Perez FJ AU - Rosales-Serna R AU - Fernandez-Hernandez P AU - Castillo-Rosales A AU - Kelly JD AD - INIFAP, Bean Program, Chapingo 56230, Estado De Mexic, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Apartado Postal 10, Chapingo 56230, Estado De Mexic, Mexico TI - Registration of 'Mestizo' pinto bean MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000176236800055 L2 - COLLETOTRICHUM-LINDEMUTHIANUM SO - Crop Science 2001 ;41(5):1650-1651 2686 UI - 13436 AU - costa-Gallegos JA AU - Rosales-Serna R AU - Nunez-Gonzalez S AU - Ochoa-Marquez R AU - varado-Mendoza S AU - Singh SP AD - INIFAP, Bean Program, Chapingo 56230, MexicoUniv Idaho, Dept Plant Soil & Entomol Sci, Kimberly, ID 83341, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Apartado Postal 10, Chapingo 56230, Mexico TI - Registration of 'Negro Otomi' shiny black bean MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000169469600049 L2 - COLLETOTRICHUM-LINDEMUTHIANUM SO - Crop Science 2001 ;41(1):261-262 2687 UI - 12673 AU - Cosultchi A AU - Garciafigueroa E AU - Garcia-Borquez A AU - Reguera E AU - Yee-Madeira H AU - Lara VH AU - Bosch P AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIPN, ESIQIE, Dept Met Engn, Mexico City 07738, DF, MexicoIPN, UPALM, ESFM, Mexico City 07738, DF, MexicoIPN, CICATA, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 07738, DF, MexicoUniv La Habana, Havana, CubaUAM I, Mexico City 09340, DF, MexicoCosultchi, A, Inst Mexicano Petr, 152 Eje Cent L Cardenas, Mexico City 07730, DF, Mexico TI - Petroleum solid adherence on tubing surface AB - Blocking of the crude oil flow is induced occasionally by the presence of a black layer of material adhered along the internal walls of petroleum wells. A piece of tubing with a significant amount of organic material, collected from a Mexican oil well, was analyzed by Mossbauer Spectroscopy (MS), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIRS). At room temperature, a fraction of the adherence detaches easily off from the tubing surface, but part of it remains firmly adhered. Non-stoichiometric iron oxides (oxidized magnetite or maghemite) and iron sulfides (pyrrhotite) and also small amounts of iron hydroxides and organic material were found on the tubing surface with adhered-material. This suggests a competitive adsorption of sulfur atoms and hydroxyl groups from petroleum, on the surface iron sites. Finally, the organic material, which contains alkyl chains and aromatic rings, is adsorbed non-dissociatively on the modified surface but only in the presence of non-stoichiometric iron sulfide. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 12 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0016-2361 UR - ISI:000171584300014 L2 - petroleum;deposition;iron compounds;Mossbauer spectroscopy;COAL-LIQUEFACTION; IRON; ADSORPTION; WATER; CORROSION; CATALYST; H2S SO - Fuel 2001 ;80(13):1963-1968 2688 UI - 11122 AU - Covington AM AU - Aguilar A AU - Davis VT AU - Alvarez I AU - Bryant HC AU - Cisneros C AU - Halka M AU - Hanstorp D AU - Hinojosa G AU - Schlachter AS AU - Thompson JS AU - Pegg DJ AD - Univ Nevada, Dept Phys, Reno, NV 89557, USAUniv Nevada, Chem Phys Programme, Reno, NV 89557, USAUS Mil Acad, Dept Phys, W Point, NY 10996, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv New Mexico, Albuquerque, NM 87131, USAPortland State Univ, Dept Phys, Portland, OR 97229, USAChalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, SwedenUniv Gothenburg, SE-41296 Gothenburg, SwedenUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Tennessee, Dept Phys, Knoxville, TN 37996, USACovington, AM, Univ Nevada, Dept Phys, Reno, NV 89557, USA TI - Correlated processes in inner-shell photodetachment of the Na- ion AB - We have measured the total cross section for photodetachment of the Na- ion over the photon energy range 30-51 eV. Electron detachment leads predominantly to the production of Na+ ions in this energy range. The structures in the measured cross section are associated with correlated processes involving the detachment or excitation of a 2p core electron, processes which are often accompanied by the excitation of one or more valence electrons. The most prominent feature in the cross section is a strong resonance associated with the excitation of a 2p electron from the core and a 3s valence electron. As in previous experiments on double excitation of valence electrons, electron correlation is seen to play an important role in the dynamics of negative ions MH - Mexico|Morelos MH - Sweden MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000175721900005 L2 - NEGATIVE-IONS; LI SO - Journal of Physics B-Atomic Molecular and Optical Physics 2001 ;34(22):L735-L740 2689 UI - 12192 AU - Covington AM AU - Aguilar A AU - Covington IR AU - Gharaibeh M AU - Shirley CA AU - Phaneuf RA AU - Alvarez I AU - Cisneros C AU - Hinojosa G AU - Bozek JD AU - Dominguez I AU - Sant'Anna MM AU - Schlachter AS AU - Berrah N AU - Nahar SN AU - McLaughlin BM AD - Univ Nevada, Dept Phys, Reno, NV 89557, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAWestern Michigan Univ, Dept Phys, Kalamazoo, MI 49008, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USACovington, AM, Univ Nevada, Dept Phys, MS 220, Reno, NV 89557, USA TI - Photoionization of metastable O+ ions: Experiment and theory AB - High-resolution absolute experimental measurements and two independent theoretical calculations were performed for photoionization of O+ ions from the P-2(0) and D-2(0) metastable levels and from the S-4(0) ground state in the photon energy range 30-35.5 eV. This is believed to be the first comparison of experiment and theory to be reported for photoionization from metastable states of ions. While there is correspondence between the predicted and measured positions and relative strengths of the resonances, the cross-section magnitudes and fine structure are sensitive to the choice of basis states MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 30 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000172642100016 L2 - ATOMIC NITROGEN; CROSS-SECTIONS; OSCILLATOR-STRENGTHS; OPACITY CALCULATIONS; OXYGEN; EXCITATION; STATES SO - Physical Review Letters 2001 ;8724(24): 2690 UI - 14333 AU - Cox AL AU - Sparke LS AU - Watson AM AU - van Moorsel G AD - Beloit Coll, Dept Phys & Astron, Beloit, WI 53511, USAUniv Wisconsin, Dept Astron, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoNatl Radio Astron Observ, Array Operat Ctr, Socorro, NM 87801, USACox, AL, Beloit Coll, Dept Phys & Astron, 700 Coll St, Beloit, WI 53511 USA TI - Stars and gas in the galaxy pair II Zw 70/71 AB - II Zw 71 (UGC 9562) has been classified as a "probable" polar ring galaxy, based on its optical appearance. We present 21 cm and optical observations of this galaxy and its companion, the blue star-forming dwarf II Zw 70. Our 21 cm observations show that 5 x 10(8) solar masses of H I are present in a polar ring orbiting II Zw 71 and show a spatially and kinematically contiguous streamer with 2.5 x 10(8) solar masses of H I gas between the two galaxies. This gaseous bridge, plus our observations of H alpha line emission in the polar ring and in II Zw 71, are strong evidence for an ongoing interaction between the two galaxies. However, the configuration of the streamer suggests that the polar ring itself may well have predated the current interaction, which then stimulated an outburst of star formation in the ring gas MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000166939700009 L2 - galaxies : individual (II Zw 70/71);galaxies : interactions;galaxies : kinematics and dynamics;POLAR-RING GALAXIES; SPIRAL GALAXIES; HUBBLE SEQUENCE; MASS FUNCTION; S0 GALAXIES; DARK HALO; PHOTOMETRY; SOUTHERN; SHAPE; LINE SO - Astronomical Journal 2001 ;121(2):692-701 2691 UI - 14550 AU - Coyaji K AU - Elul B AU - Krishna U AU - Otiv S AU - Ambardekar S AU - Bopardikar A AU - Raote V AU - Ellertson C AU - Winikoff B AD - Populat Council, New York, NY 10017, USAKEM Hosp, Pune, Maharashtra, IndiaBhatia Gen Hosp, Mumbai, IndiaPopulat Council, Mexico City, DF, MexicoWinikoff, B, Populat Council, New York, NY 10017, USA TI - Mifepristone abortion outside the urban research hospital setting in India AB - Medical abortion holds great promise in less-developed countries, where abortion morbidity and mortality remain high. We tested the French mifepristone-misoprostol regimen in two urban outpatient family-planning clinics (n=600) and a rural hospital (n=300) in India. 4% of urban women and 1% of rural women were lost to follow-up. Perfect use and typical-use success rates were as high as European rates at all sites. Although rural women reported fewer side-effects, most women in urban and rural settings were satisfied with their medical abortions. Medical abortion can be offered safely, effectively, and acceptably in urban outpatient clinics and rural hospitals in India MH - India MH - Mexico|Distrito Federal MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 6 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000166476200018 L2 - MEDICAL ABORTION; MISOPROSTOL; ACCEPTABILITY; TERMINATION; PREGNANCY; TRIAL SO - Lancet 2001 ;357(9250):120-122 2692 UI - 12958 AU - Coziol R AU - Doyon R AU - Demers S AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoObserv Besancon, UPRESA 6091, F-25010 Besancon, FranceUniv Montreal, Dept Phys, Observ Mt Megant, Montreal, PQ H3C 3J7, CanadaCoziol, R, Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico TI - Near-infrared spectroscopy of starburst galaxies AB - We present new K-band spectroscopy for a sample of 48 starburst galaxies, obtained using UKIRT in Hawaii. This constitutes a fair sample of the most common types of starburst galaxies found in the nearby Universe, containing galaxies with different morphologies, masses and metallicities, with far-infrared luminosity L-IR < 10(10) L.. The variety of near-infrared spectral features shown by these galaxies implies different bursts characteristics, which suggests that we survey galaxies with different star formation histories or at different stages of their burst evolution. Using synthetic starburst models, we conclude that the ensemble of parameters that best describes starburst galaxies in the nearby Universe is a constant rate of star formation, a Salpeter initial mass function (IMF) with an upper mass cut-off of M-up = 30 M. and bursts ages between 10 Myr and 1 Gyr. The model is fully consistent with the differences observed in the optical and far-infrared (FIR) between the different types of starbursts. It suggests that H II galaxies have younger bursts and lower metallicities than starburst nucleus galaxies (SBNGs), while luminous infrared galaxies (LIRGs) have younger bursts but higher metallicities. Although the above solution from the synthetic starburst model is fully consistent with our data, it may not constitute a strong constraint on the duration of the bursts and the IMF. A possible alternative may be a sequence of short bursts (which may follow an universal IMF) over a relatively long period of time. In favour of the multiple-burst hypothesis, we distinguish in our spectra some variations of near-infrared (NIR) features with the aperture that can be interpreted as evidence that the burst regions are not homogeneous in space and time. We also found that the burst stellar populations are dominated by early-type B stars, a characteristic which seems difficult to explain with only one evolved burst. Our observations suggest that the starburst phenomenon must be a sustained or self-sustained phenomenon: either star formation is continuous in time, or multiple bursts happen in sequence over a relatively long period of time. The generality of our observations implies that this is a characteristic of starburst galaxies in the nearby Universe MH - Canada MH - France MH - Mexico|Guanajuato PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000170666400016 L2 - galaxies : starburst;infrared : galaxies;EMISSION-LINE GALAXIES; UV-BRIGHT CANDIDATES; H-II GALAXIES; STAR-FORMATION; SPIRAL GALAXIES; 2 MICRONS; OPTICAL SPECTROSCOPY; LUMINOSITY FUNCTION; NUCLEUS GALAXIES; GALACTIC NUCLEI SO - Monthly Notices of the Royal Astronomical Society 2001 ;325(3):1081-1096 2693 UI - 12294 AU - Cremades O AU - Ponce E AU - Corpas R AU - Gutierrez JF AU - Jover M AU - varez-Ossorio MC AU - Parrado J AU - Bautista J AD - Univ Sevilla, Fac Farm, Dept Bioquim Bromatol & Toxicol, E-41012 Seville, SpainUniv Autonoma Mexico, Unidad Aztapala, Dept Biotechnol, Mexico City, DF, MexicoBautista, J, Univ Sevilla, Fac Farm, Dept Bioquim Bromatol & Toxicol, E-41012 Seville, Spain TI - Processing of crawfish (Procambarus clarkii) for the preparation of carotenoproteins and chitin AB - Crawfish carotenoproteins and chitin are obtained by a combined process based on flotation-sedimentation and in situ lactic add production. The carotenoprotein PF1 obtained has a high content in essential amino acids, w-3-fatty acids, and carotene (mainly astaxanthin) and constitutes an excellent nutritional source for patients with malnutrition. The carotenoprotein PF2 has a lower nutritional quality but with a substantial carotene content can be used as a feed for animals where coloration is required, such as salmon and trout bred under aquaculture. Chemical and spectrometric (FTIR and C-13 NMR) characterization shows the obtained chitin to be of high quality, similar to that available commercially, for medical and nutritional uses MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000172467200060 L2 - Carotenoproteins;chitin;essential amino acids;astaxanthin;crawfish;malnutrition;SUNFLOWER MEAL; SHELL WASTE; FERMENTATION; ASTAXANTHIN; RECOVERY; HYDROLYSATE; BIOREACTOR; PROTEINS SO - Journal of Agricultural and Food Chemistry 2001 ;49(11):5468-5472 2694 UI - 13929 AU - Creus S AU - Chaia Z AU - Pellizzari EH AU - Cigorraga SB AU - Ulloa-Aguirre A AU - Campo S AD - Hosp Gen Ninos R Gutierrez, Ctr Invest Endocrinol, RA-1425 Buenos Aires, DF, ArgentinaInst Mexicano Seguro Social, Hosp Ginecobstet 4, Res Unit Reprod Med, Mexico City, DF, MexicoCampo, S, Hosp Gen Ninos R Gutierrez, Ctr Invest Endocrinol, Gallo 1330, RA-1425 Buenos Aires, DF, Argentina TI - Human FSH isoforms: carbohydrate complexity as determinant of in-vitro bioactivity AB - Differences in sialic acid content of the hormone have been considered the main determinant or FSH polymorphism. The aim of the present study was to investigate the effect of variations in the oligosaccharide structure of the intrapituitary human FSH (hFSH) glycosylation variants on their intrinsic biological activity. FSH charge isoforms obtained after chromatofocusing were further separated lay lectin affinity chromatography [Concanavalin A (ConA), Wheat germ agglutinin (WGA), Lentil lectin (LcH)]. Isolated isoforms were separately tested for in-vitro bioactivity in a rat Sertoli cell aromatization bioassay. Our results show that: (1) FSH microheterogeneity is due not only to variations in the sialic acid content of the hormone but also to differences in the internal structure of the carbohydrate chains, and (2) variations in the sialic acid content as well as differences in the complexity of the glycans determine the full biological expression of FSH glycosylation variants. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 25 U4 - Cell Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0303-7207 UR - ISI:000168011700005 L2 - carbohydrate complexity;follicle-stimulating hormone (human pituitary);FSH bioactivity;FSH isoforms;FOLLICLE-STIMULATING-HORMONE; ASPARAGINE-LINKED OLIGOSACCHARIDES; PITUITARY FSH; AFFINITY-CHROMATOGRAPHY; BIOLOGICAL-ACTIVITIES; RECEPTOR-BINDING; FEMALE RAT; FORMS; SERUM; WOMEN SO - Molecular and Cellular Endocrinology 2001 ;174(1-2):41-49 2695 UI - 13336 AU - Croll DA AU - cevedo-Gutierrez A AU - Tershy BR AU - Urban-Ramirez J AD - Univ Autonoma Baja California, Dept Biol Marina, La Paz 23080, MexicoUniv Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064, USACroll, DA, Univ Calif Santa Cruz, Inst Marine Sci, A316 Earth & Marine Sci Bldg, Santa Cruz, CA 95064 USA TI - The diving behavior of blue and fin whales: is dive duration shorter than expected based on oxygen stores? AB - Many diving seabirds and marine mammals have been found to regularly exceed their theoretical aerobic dive limit (TADL). No animals have been found to dive for durations that are consistently shorter than their TADL. We attached time-depth recorders to 7 blue whales and 15 fin whales (family Balaenopteridae). The diving behavior of both species was similar, and we distinguished between foraging and traveling dives. Foraging dives in both species were deeper, longer in duration and distinguished by a series of vertical excursions where lunge feeding presumably occurred. Foraging blue whales lunged 2.4 (+/-1.13) times per dive, with a maximum of six times and average vertical excursion of 30.2(+/- 10.04) m. Foraging fin whales lunged 1.7 (+/-0.88) times per dive, with a maximum of eight times and average vertical excursion of 21.2 (+/-4.35) m. The maximum rate of ascent of lunges was higher than the maximum rate of descent in both species, indicating that feeding lunges occurred on ascent. Foraging dives were deeper and longer than non-feeding dives in both species. On average, blue whales dived to 140.0 (+/- 46.01) m and 7.8 (+/- 1.89) min when foraging, and 67.6 (+/- 51.46) m and 4.9 (+/-2.53) min when not foraging. Fin whales dived to 97.9 (+/- 32.59)m and 6.3 (+/-1.53) min when foraging and to 59.3 (+/- 29.67)m and 4.2 (+/-1.67) min when not foraging. The longest dives recorded for both species, 14.7 min for blue whales and 16.9 min for fin whales, were considerably shorter than the TADL of 31.2 and 28.6 min, respectively. An allometric comparison of seven families diving to an average depth of 80-150 m showed a significant relationship between body mass and dive duration once Balaenopteridae whales, with a mean dive duration of 6.8 min, were excluded from the analysis. Thus, the short dive durations of blue whales and fin whales cannot be explained by the shallow distribution of their prey. We propose instead that short duration diving in large whales results from either: (1) dispersal behavior of prey; or (2) a high energetic cost of foraging. (C) 2001 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Baja California Sur PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Physiology;Zoology U5 - J;Article AV - English IS - 1095-6433 UR - ISI:000169788500007 L2 - diving;aerobic dive limit;blue whale;fin whale;foraging;Balaenoptera physalus;Balaenoptera musculus;rorquals;Balaenopteridae;DELPHINAPTERUS-LEUCAS; BALAENA-MYSTICETUS; FORAGING ECOLOGY; MARINE MAMMALS; WEDDELL SEALS; FUR SEALS; PATTERNS; DEEP; PERFORMANCE; ALLOCATION SO - Comparative Biochemistry and Physiology A-Molecular & Integrative Physiology 2001 ;129(4):797-809 2696 UI - 13668 AU - Croxatto HB AU - Devoto L AU - Durand M AU - Ezcurra E AU - Larrea F AU - Nagle C AU - Ortiz ME AU - Vantman D AU - Vega M AU - von Hertzen H AD - Inst Chileno Med Reprod, Santiago, ChileUniv Chile, Hosp San borja Arriaran, Inst Invest Materno Infantil, Santiago, ChileInst Nacl Nutr SZ, Mexico City, DF, MexicoWHO, Human Reprod Program, CH-1211 Geneva, SwitzerlandCtr Educ Med & Invest Clin, Buenos Aires, DF, ArgentinaCroxatto, HB, Inst Chileno Med Reprod, Santiago, Chile TI - Mechanism of action of hormonal preparations used for emergency contraception: a review of the literature MH - Argentina MH - Chile MH - Mexico|Distrito Federal MH - Switzerland PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 58 U4 - Obstetrics & Gynecology U5 - J;Review AV - English IS - 0010-7824 UR - ISI:000168767700001 L2 - POST-COITAL CONTRACEPTION; IMPLANTATION STAGE ENDOMETRIUM; RHESUS-MONKEY; POSTCOITAL CONTRACEPTION; MIFEPRISTONE RU486; YUZPE REGIMEN; ETHINYLESTRADIOL COMBINATION; ESTROGEN-RECEPTOR; MENSTRUAL-CYCLE; DL-NORGESTREL SO - Contraception 2001 ;63(3):111-121 2697 UI - 12550 AU - Cruz-Atienza VM AU - Pacheco JF AU - Singh SK AU - Shapiro NM AU - Valdes C AU - Iglesias A AD - Univ Nacl Autonoma Mexico, CU, Inst Geofis, Coyoacan 04510, DF, MexicoCruz-Atienza, VM, UNSA, CNRS, Geosci Azur, 250 Rue A Einstein, F-06560 Nice, France TI - Size of Popocatepetl volcano explosions (1997-2001) from waveform inversion AB - Several volcanic explosions have been recorded since April 1997 at broadband seismic stations located around the Popocatepetl volcano, Mexico. We have inverted waveforms of ten of these explosions to estimate the following source parameters: depth, duration, magnitude and direction of the single force, F. The crustal structure used in generating Green's function at nearest stations is derived from the inversion of teleseismic receiver functions at the broadband permanent station PPIG, located 5 km north of the volcano. This inversion reveals a low velocity zone at similar to8 km beneath the summit with high Poisson ratio, possibly related to the magma chamber. We find that F scales with tau, the duration of the source-time function, as F proportional to tau (2). Based on this relationship we determine an impulse magnitude scale, M-k. This magnitude is tied to the Mount Saint Helens initial explosive phase of May 18, 1980, whose magnitude is estimated as 4.6. M-k, of the ten Popocatepetl explosions ranges between 1.8 and 3.2. Finally, we also propose an equivalent formula for rapid estimation of magnitude of future Popocatepetl explosions, which requires filtered amplitudes at PPIG MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000171780000004 L2 - MOUNT-ST-HELENS; BODY WAVES; ERUPTION; MEXICO SO - Geophysical Research Letters 2001 ;28(21):4027-4030 2698 UI - 12830 AU - Cruz-Jauregui MP AU - Siqueiros JM AU - Portelles J AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUNAM, Ctr Ciencias Mat Condensada, Mexico City, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana, CubaCruz-Jauregui, MP, Ctr Invest Cient & Educ Super Ensenada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - Influence of Bi2O3 in the microstructure of SrBi2Ta2O3 films deposited by pulsed laser ablation AB - A systematic study of the microstructural features of SrBi2Ta2O9 (SBT) films prepared on Pt(111)/TiO2/SiO2/Si by pulsed laser deposition (PLD) and heat treated at different temperatures, is presented. The films heat treated during deposition have a temperature-induced preferential growth in the (1 1 5) orientation and reach the SBT crystal structure at 600 degreesC, free from undesired secondary phases. From transmission electron microscopy and X-ray diffraction analysis, the morphology of the SBT and the Bi2O3 crystals in the films are determined. Additionally, the non-oriented polycrystalline growth and the development of cracks in films deposited at the lowest temperature (300 degreesC) and then annealed at high temperatures are explained. It is seen in these films that once the Bi2O3 crystal phase is eliminated during the post-annealing process, the growth of the SBT crystals is linear at a rate of of 0.8nm\degC(-1). It is proposed, as a result of these studies, that a deposition temperature of at least 600 degreesC should be used to avoid the presence of crystalline Bi2O3 and cracking during the post-annealing treatment. (C) 2001 Kluwer Academic Publishers MH - Cuba MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0957-4522 UR - ISI:000171063900006 L2 - CHEMICAL-VAPOR-DEPOSITION; FERROELECTRIC THIN-FILMS; MEMORIES SO - Journal of Materials Science-Materials in Electronics 2001 ;12(8):461-465 2699 UI - 12091 AU - Cruz-Lopez L AU - Rojas JC AU - De la Cruz-Cordero R AU - Morgan ED AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Keele, Sch Chem & Phys, Lennard Jones Lab, Chem Ecol Grp, Keele ST5 5BG, Staffs, EnglandCruz-Lopez, L, El Colegio Frontera Sur, Carretera Antiguo Aeropuerto Km 2-5, Tapachula 30700, Chiapas, Mexico TI - Behavioral and chemical analysis of venom gland secretion of queens of the ant Solenopsis geminata AB - Bioassays in a Y-tube olfactometer showed that workers of Solenopsis geminata (Hymenoptera: Formicidae) were attracted to venom gland extracts of queens. Gas chromatography coupled mass spectrometry analysis of individual glands of queens of S. geminata showed that the secretion is composed mainly of a large amount of 2-alkyl-6-methylpiperidine alkaloids and a tiny amount of a delta -lactone and a alpha -pyrone, which have been earlier identified as components of the queen attractant pheromone of Solenopsis invicta Buren. However, additional small amounts of a mixture of sesquiterpenes and pentadecene were found. The possible function of the sesquiterpenoid compounds is discussed MH - United Kingdom MH - Mexico|Chiapas PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000173063800004 L2 - Solenopsis geminata;fire ants;venom secretion;sesquiterpenes;queen pheromone recognition;FIRE ANTS; RECOGNITION PHEROMONE; INVICTA; CHROMATOGRAPHY; HYMENOPTERA; FORMICIDAE; WORKERS; SAMPLES SO - Journal of Chemical Ecology 2001 ;27(12):2437-2445 2700 UI - 12115 AU - Cruz-Lopez L AU - Malo EA AU - Rojas JC AU - Morgan ED AD - ECOSUR, Dept Entomol Trop, Tapachula, Chiapas, MexicoUniv Keele, Sch Chem & Phys, Keele ST5 5BG, Staffs, EnglandCruz-Lopez, L, ECOSUR, Dept Entomol Trop, Apdo Postal 36, Tapachula, Chiapas, Mexico TI - Chemical ecology of triatomine bugs: vectors of Chagas disease AB - Knowledge of chemical ecology of haematophagous triatomine bugs (Hemiptera: Heteroptera: Reduviidae) could be of practical value because this polyphyletic subfamily includes species of medical importance, such as vectors of Trypanosoma cruzi Chagas (Kinetoplastida: Trypanosomatidae), the aetiological agent of Chagas disease. For particular species of Dipetalogaster, Panstrongylus, Rhodnius and Triatoma, therefore, we review information on exocrine glands and products, interpreting their apparent roles as semiochemicals in the aggregation, alarm, defence, host-finding and sexual behaviour of these Triatominae MH - United Kingdom MH - Mexico|Chiapas PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Entomology;Veterinary Sciences U5 - J;Review AV - English IS - 0269-283X UR - ISI:000172903600001 L2 - Dipetalogaster;Panstrongylus;Rhodnius;Triatoma;Chagas disease;chemical ecology;exocrine glands;insect behaviour;semiochemicals;Triatominae;trypanosomiasis;vectors;zoonoses;Americas;INFESTANS HEMIPTERA; SEX-PHEROMONE; AGGREGATION PHEROMONE; LABORATORY CONDITIONS; MAZZOTTII HEMIPTERA; RHODNIUS-PROLIXUS; REDUVIIDAE; BEHAVIOR; HYDROCARBONS; RESPONSES SO - Medical and Veterinary Entomology 2001 ;15(4):351-357 2701 UI - 13996 AU - Cruz-Lopez L AU - Patricio EFLR AU - Morgan ED AD - Univ Keele, Sch Chem & Phys, Lennard Jones Lab, Chem Ecol Grp, Keele ST5 5BG, Staffs, EnglandEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Sao Paulo, Inst Biociencias, Lab Abelhas, BR-05508900 Sao Paulo, BrazilMorgan, ED, Univ Keele, Sch Chem & Phys, Lennard Jones Lab, Chem Ecol Grp, Keele ST5 5BG, Staffs, England TI - Secretions of stingless bees: The Dufour gland of Nannotrigona testaceicornis AB - The Dufour gland of Nannotrigona restaceicornis is a large, wide, pear-shaped sac. The gland secretion consists chiefly of the diterpene ester all-trans-geranylgeranyl acetate (64% of the total), together with a complex mixture of small amounts of cyclic ketals: mono-. sesqui-. and diterpene compounds: acetates: and other oxygenated compounds, Samples of N. testaceicornis collected at two sites in Brazil and one in Mexico shared the same composition of their glands. suggesting that the species is uniform over this wide geographical area MH - Brazil MH - United Kingdom MH - Mexico|Chiapas PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000167772000006 L2 - hymenoptera;Apidae;Meliponinae;exocrine secretion;geranylgeranyl acetate;terpene;oxidation products;MACROCYCLIC LACTONES; SPECIES-SPECIFICITY; HYMENOPTERA; IDENTIFICATION; ANTS; CHROMATOGRAPHY; BUMBLEBEES; COMPONENTS; CHEMISTRY; BEHAVIOR SO - Journal of Chemical Ecology 2001 ;27(1):69-80 2702 UI - 14024 AU - Cruz-Suarez LE AU - Ricque-Marie D AU - Tapia-Salazar M AU - McCallum IM AU - Hickling D AD - Univ Autonoma Nuevo Leon, Program Maricultura, Fac Ciencias Biol, Nuevo Leon 66450, Monterrey, MexicoPulse Canada, Winnipeg, MB R3C 3Z3, CanadaCanadian Int Grains Inst, Winnipeg, MB R3C 3G7, CanadaRicque-Marie, D, Univ Autonoma Nuevo Leon, Program Maricultura, Fac Ciencias Biol, Cd Univ,Apdo Postal F-56, Nuevo Leon 66450, Monterrey, Mexico TI - Assessment of differently processed feed pea (Pisum sativum) meals and canola meal (Brassica sp.) in diets for blue shrimp (Litopenaeus stylirostris) AB - The nutritional value of whole, dehulled, extruded, dehulled-extruded and micronized feed peas, and extruded canola meal, included at a 30% concentration as ingredients in diets for juvenile blue shrimp was assessed. Pea meals replaced a portion of soybean meal and wheat (1:3 parts) on an isonitrogenous and isoenergetic basis, and similarly extruded canola meal replaced a portion of soybean meal, fish meal and wheat (1:2:3 parts) of a control diet. After 28 days, the shrimp almost tripled their weight on the experimental diets. Performance was unaffected by dehulling, except for a slight increase in feed consumption and lower protein efficiency ratio (PER), Extrusion cooking had no effect on growth and survival but significantly improved feed conversion and PER. The micronized pea diet produced the highest feed intake and growth rate. Response to the diet containing extruded canola meal was similar to that of the control diet. ingredient apparent dry matter digestibility (IADMD) ranged from 80.7% for micronized peas to 92.4% for dehulled-extruded peas, and was 79.4% for extruded canola meal. Higher IADMD coefficients were obtained for extruded pea meals as a result of starch gelatinization. Ingredient apparent protein digestibility (IAPD) ranged from 79.1% to 85.4% and did not differ significantly amongst the test meals. The test ingredients also conferred differential water stability properties with the whole-extruded peas ingredient containing diet having the lowest dry matter and crude protein (CP) loss following a I-h immersion in water. This study showed that whole raw feed pea is a very acceptable ingredient for blue shrimp diets; extrusion cooking improved feed conversion ratio and PER, and micronizing peas enhanced feed intake, while dehulling had no effect. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000167841600008 L2 - crustacean;nutrition;growth;digestibility;peas;canola;TROUT ONCORHYNCHUS-MYKISS; BASS DICENTRARCHUS-LABRAX; PENAEUS-VANNAMEI; CARBOHYDRATE SOURCES; NUTRITIVE-VALUE; SEED MEAL; DIGESTIBILITY; GROWTH; PROTEIN; MONODON SO - Aquaculture 2001 ;196(1-2):87-104 2703 UI - 12990 AU - Cruz E AU - Negron A AU - Ramos A AU - Ramos S AU - Hernandez J AU - Jaque F AU - Murrieta H AD - UNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoUniv Complutense Madrid, Dept Fis Mat, Madrid, SpainRamos, S, UNAM, Inst Ciencias Nucl, Apto Postal 70-543, Mexico City, DF, Mexico TI - Gamma coloration of mixed crystals of KCl-KBr doped with Pb2+ AB - The amount of the first stage coloration in KCl1-xBrx, doped with Pb2+ has been investigated as a function of the dose rate and impurity concentration. For a dose rate of 12.88 kGy/h, the F color center production was independent of the quantity of Pb2+, and varied according to the ratio KCl/KBr. At a proportion of 50% of each halogen the typical stages were observed. However, if the dose rate is less than 3.22kGy/h, the coloration production depends on the quantity of Pb. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000170526600055 L2 - color centers;mixed crystals;alkaline halides;ionizing radiation SO - Radiation Physics and Chemistry 2001 ;61(3-6):443-444 2704 UI - 13907 AU - Cruz R AU - Bertrand V AU - Monroy M AU - Gonzalez I AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv British Columbia, Dept Min & Mineral Proc Engn, Vancouver, BC V6T 1Z4, CanadaUniv Autonoma San Luis Potosi, Inst Metalurgia, San Luis Potosi, MexicoGonzalez, I, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Effect of sulfide impurities on the reactivity of pyrite and pyritic concentrates: a multi-tool approach AB - Sulfide mineral oxidation, primarily pyrite and pyrrhotite, generates acid mine drainage during weathering. Successful management of acid generating wastes entails the suppression of the initiation of oxidation reactions. The reactivity of pyrite depends on ore mineralogy, including the effects of associated sulfide impurities. The electrochemical surface characterization study using cyclic voltammetry with carbon paste electrodes containing minerals particles (CPE-Mineral) is an effective tool for demonstrating how the Various mineral characteristics work together to influence the overall reactivity of the mineral. This study was supported by chemical, mineralogical and leachate chemistry data. The results show that the presence of other sulfides in contact with pyrite at the beginning of the weathering process is the most important parameter affecting pyrite reactivity, which is likely to be oxidized and passivated. In more advanced stages of leaching, mineral coatings which passivate the pyrite surfaces tend to play the most important role in defining the reactivity of pyrite. The electrochemical response of pyritic samples in conjunction with the evolution of the chemical quality of the leach solution in the simple experimental device here used, could then provide valuable information on acid mine drainage generation. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0883-2927 UR - ISI:000168093700007 L2 - CARBON-PASTE ELECTRODES; SURFACE OXIDATION; VOLTAMMETRY; DISSOLUTION; GALENA SO - Applied Geochemistry 2001 ;16(7-8):803-819 2705 UI - 13637 AU - Cuesta-Rubio O AU - Velez-Castro H AU - Frontana-Uribe BA AU - Cardenas J AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv La Habana, Inst Farm & Alimentos, Habana 13600, CubaCtr Quim Farmaceut, Habana 13600, CubaCardenas, J, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior,Cuidad Univ, Mexico City 04510, DF, Mexico TI - Nemorosone, the major constituent of floral resins of Clusia rosea AB - Nemorosone, the major constituent of the floral resin of Clusia rosea was isolated after exhaustive chromatography. This compound was fully characterized as it is in the nature, without methylation as reported before. A keto-enol equilibrium was observed and both isomers were totally characterized by NMR spectroscopic techniques. The previously announced structure for methylnemorosone was corrected on the basis of application of chemical methylation, high field 2D NMR techniques and NOE difference spectroscopy experiments on the natural product. Our studies concluded that an interchange occurred in the assignment of the benzoyl moiety position with an isoprenyl group in that structure. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000168776600018 L2 - Clusia rosea;guttiferae;copey;polyisoprenylated benzophenone;nemorosone;INHIBITORY NATURAL-PRODUCTS; PRENYLATED BENZOPHENONE SO - Phytochemistry 2001 ;57(2):279-283 2706 UI - 13404 AU - Cueto-Manzano AM AU - Freemont AJ AU - Adams JE AU - Mawer B AU - Gokal R AU - Hutchison AJ AD - IMSS, CMNO,Hosp Especialidades, Med Res Unit Clin Epidemiol, Unidad Invest Med Epidemiol Clin, Guadalajara 44320, Jalisco, MexicoUniv Manchester, Dept Osteopathol, Manchester, Lancs, EnglandUniv Manchester, Dept Diagnost Radiol, Manchester, Lancs, EnglandUniv Manchester, Dept Med, Manchester, Lancs, EnglandManchester Royal Infirm, Dept Renal Med, Manchester M13 9WL, Lancs, EnglandCueto-Manzano, AM, IMSS, CMNO,Hosp Especialidades, Med Res Unit Clin Epidemiol, Unidad Invest Med Epidemiol Clin, Belisario Dominguez 1000,Col Independencia, Guadalajara 44320, Jalisco, Mexico TI - Association of sex hormone status with the bone loss of renal transplant patients AB - Background, Bone loss is an important problem in renal transplantation recipients. The role of sex hormones in this setting has not been previously addressed. The objective was to investigate whether sex hormone status is associated with bone mass loss in renal transplant recipients. Methods. Thirty patients (16 men and 14 women, of which eight were post-menopausal) were studied by bone densitometry and bone biopsy. In women, serum oestradiol levels and menopausal status were determined, in men, serum testosterone levels were assessed. Results. Mean age was 48 +/- 11 years. Time on dialysis was 13 +/- 17 months, and time since transplantation was 125+/-67 months. Thirteen patients were on cyclosporine A (CsA) monotherapy, 12 on azathioprine plus prednisolone (PRED) dual therapy, and five on CsA, azathioprine and PRED triple therapy. In men, serum testosterone levels were 19.7 +/- 6.8 nmol/l (mean +/- SD). In pre-menopausal women, oestradiol serum levels were 209(128-289)pmol/l (median (percentiles 25-75%)), and in post-menopausal women 93(54-299)pmol/l (non-significant). Univariate analysis in women demonstrated that serum oestradiol levels were positively correlated with Z scores of osteoblast surface (r = 0.70, P=0.005), osteoid surface (r=0.75, P=0.002) and trabecular wall thickness (r = 0.68, P = 0.008). In men, a weak correlation was seen between serum testosterone levels and the cumulative dose of PRED (r=-0.52, P=0.06). In the multivariate analysis, two models of multiple regression were employed tone for women and one for men), considering the densitometric and histomorphometric variables (Z scores) as dependent variables. Serum testosterone in men did not predict any of the densitometric nor histomorphometric variables analysed, while serum oestradiol in women was an independent predictor for the osteoblast surface (r=0.81, P=0.003), osteoid surface (r=0.82, P=0.009) and trabecular wall thickness (r=0.54, P=0.05). Conclusions. In female renal transplant recipients, serum oestradiol levels independently predict the bone status, while in men, factors other than testosterone seem to influence bone loss. Our results give rise to the hypothesis that sex hormone replacement therapy may play a role in prevention and/or treatment of the bone loss in women following renal transplantation MH - United Kingdom MH - Mexico|Jalisco PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Transplantation;Urology & Nephrology U5 - J;Article AV - English IS - 0931-0509 UR - ISI:000169399800023 L2 - bone densitometry;bone histomorphometry;bone loss;oestradiol;renal transplantation;testosterone;MINERAL DENSITY; GONADAL AXIS; THERAPY; OSTEOPOROSIS; MEN SO - Nephrology Dialysis Transplantation 2001 ;16(6):1245-1250 2707 UI - 14053 AU - Cueto-Wong JA AU - Guldan SJ AU - Lindemann WC AU - Remmenga MD AD - New Mexico State Univ, Alcalde Sustainable Agr Sci Ctr, Alcalde, NM 87511, USAINIFAP, RASPA, CENID, Durango 35150, MexicoNew Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USANew Mexico State Univ, Dept Econ & Int Business, Las Cruces, NM 88003, USAGuldan, SJ, New Mexico State Univ, Alcalde Sustainable Agr Sci Ctr, POB 159, Alcalde, NM 87511 USA TI - Nitrogen recovery from N-15-labeled green manures: I. Recovery by forage sorghum and soil one season after green manure incorporation AB - This investigation was part of a project to evaluate green manure forage legumes as relay intercrops for sweet corn (Zea mays L.) and chile (Capsicum annuum L.) in north-central New Mexico. The study was carried out under irrigated conditions in 1994 on a Fruitland sandy loam (coarse-loamy, mixed, calcareous, mesic Typic Torriorthent) to evaluate the N-15 recovery by forage sorghum (Sorghum bicolor [L.] Moench) and soil after the incorporation of N-15-labeled alfalfa (Medicago sativa L. 'Nitro') or hairy vetch (Vicia villosa Roth. 'Madison'). Two application rates of alfalfa (2.7 or 4.0 Mg dry matter ha(-1)) or hairy vetch herbage (3.2 or 6.4 Mg dry matter ha(-1)); were incorporated into soil microplots. Additional treatments consisting of 56, 112, and 168 kg N ha(-1) (as urea) were used to compare soil inorganic N concentrations with those released from the legumes. Nitrogen-15 recovery by sorghum tops was 16% of the N-15 applied, in two harvests. Of this, 80% was recovered at the first harvest. In soil, N-15 recoveries were 50 and 3% of the input at the 0-0.3 and 0.3-0.6 m depths, respectively. Maximum inorganic N concentrations were found 14 d after amendment application. At the end of the growing season, inorganic N concentrations in all treatments were essentially the same as the background (8 mg N kg(-1)). The low N-15 recoveries by crop plus soil and inorganic N concentrations in soil at the end of the season suggest that about 12% and 35-58% of the N applied as green manure was lost from the system for alfalfa and hairy vetch, respectively. (C) 2001 by The Haworth Press, Inc. All rights reserved MH - Mexico|Durango MH - USA PB - BINGHAMTON: HAWORTH PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 1044-0046 UR - ISI:000167680700003 L2 - green manure;forage legume;N-15-recovery;hairy vetch;alfalfa;forage sorghum;LEGUME COVER CROPS; FIELD CONDITIONS; INORGANIC FERTILIZER; TILLAGE; N-15; CORN; RESIDUES; AVAILABILITY; ALFALFA; WHEAT SO - Journal of Sustainable Agriculture 2001 ;17(4):27-42 2708 UI - 14054 AU - Cueto-Wong JA AU - Guldan SJ AU - Lindemann WC AU - Remmenga MD AD - New Mexico State Univ, Alcalde Sustainable Agr Sci Ctr, Las Cruces, NM 87511, USAINIFAP, RASPA, CENID, Durango 35150, MexicoNew Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USANew Mexico State Univ, Dept Econ & Int Business, Las Cruces, NM 88003, USAGuldan, SJ, New Mexico State Univ, Alcalde Sustainable Agr Sci Ctr, POB 159, Las Cruces, NM 87511 USA TI - Nitrogen recovery from N-15-labeled green manures: II. Recovery by oat and soil two seasons after green manure incorporation AB - Forage legumes in crop rotations are often used to supply N far succeeding crops. However, the residual effect of forage legume green manures for second crops has not been thoroughly investigated in high desert regions of the Southwestern United States. The objective of this study was to evaluate the N-15 recovery by a second subsequent crop (oat [Avena sativa L.]) and soil from microplots amended with N-15-labeled alfalfa (Medicago sativa L. 'Nitro') and hairy vetch (Vicia villosa Roth 'Madison'). In 1994, two application rates of each legume were incorporated into 1 m(2) microplots and forage sorghum (Sorghum bicolor [L] Moench) was used to evaluate the N-15 recovery. Above-ground residues were removed from microplots immediately after each of the two sorghum harvests. in 1995, the N-15 recovery by the oat crop and soil was determined. Nitrogen-15 recovery by oat averaged 3% of the N-15 applied as green manure. Of this, 95% was found in tom and 5% in roots. Averaged across application rates, oat recovery of N-15 was 63% greater in treatments amended with alfalfa than with hairy vetch. Green manures did not affect the total N concentration of oat parts. Most of the residual N-15 was found in soil at the 0-0.3 m depth at the end of the oat season. The percent of N-15 recovery by soil in plots amended with alfalfa was 238% higher than with hairy vetch. Green manures applied in 1994 had little residual effect on the N nutrition of oat. (C) 2001 by The Haworth Press, Inc. All rights reserved MH - Mexico|Durango MH - USA PB - BINGHAMTON: HAWORTH PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 1044-0046 UR - ISI:000167680700004 L2 - green manure;forage legume;N-15-recovery;hairy vetch;alfalfa;oat;LEGUME COVER CROPS; FIELD CONDITIONS; FERTILIZER N-15; GRAIN-SORGHUM; CORN; TILLAGE; RESIDUES; WHEAT; DECOMPOSITION; ALFALFA SO - Journal of Sustainable Agriculture 2001 ;17(4):43-55 2709 UI - 13388 AU - Cueto J AU - Vazquez-Frias JA AU - Nevarez R AU - Poggi L AU - Zundel N AD - Amer British Cowdray Hosp, Mexico City, DF, MexicoAngeles Lomas Hosp, Mexico City, DF, MexicoLouisiana State Univ, Dept Surg, New Orleans, LA 70112, USAGuillermo Almenara Hosp, Dept Laparascop Surg, Lima, PeruClin Fdn Sante Fe, Dept Surg, Bogota, ColombiaCueto, J, Bosque Magnolias 87,Bosques Lomas, Mexico City 11700, DF, Mexico TI - Laparoscopic repair of traumatic diaphragmatic hernia AB - Posttraumatic diaphragmatic rupture or eventration is still a challenging problem. Herein five cases of patients with such a diaphragmatic lesion treated successfully by laparoscopy are reported with a discussion of the advantages of this mini-invasive surgical approach MH - Colombia MH - Mexico|Distrito Federal MH - Peru MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Surgery U5 - J;Article AV - English IS - 1051-7200 UR - ISI:000169489500014 L2 - laparoscopy;eventration;traumatic diaphragmatic hernia;BLUNT TRAUMA; RUPTURE; MANAGEMENT; DIAGNOSIS; INJURIES SO - Surgical Laparoscopy Endoscopy & Percutaneous Techniques 2001 ;11(3):209-212 2710 UI - 14332 AU - Cui W AU - Schulz NS AU - Baganoff FK AU - Bautz MW AU - Doty JP AU - Garmire GP AU - Mirabel IF AU - Ricker GR AU - Rodriguez LF AU - Taylor SC AD - MIT, Ctr Space Res, Cambridge, MA 02139, USAPurdue Univ, Dept Phys, W Lafayette, IN 47907, USAPenn State Univ, Dept Astron & Astrophys, University Pk, PA 16802, USACtr Etud Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, FranceInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCui, W, MIT, Ctr Space Res, Cambridge, MA 02139, USA TI - Peculiar extended X-ray emission around the "radio-loud" black hole candidate 1E 1740.7-2942 AB - We present the discovery of peculiar extended X-ray emission around 1E 1740.7-2942, a black hole candidate that is known to produce prominent, persistent radio jets. The data were obtained with the High-Energy Transmission Grating Spectrometer (HETGS) aboard the Chandra X-Ray Observatory. The zeroth-order image reveals an elongated feature about 3 " in length that is roughly perpendicular to the radio lobes (or jets). The feature is roughly symmetric about the point source. It is spatially resolved in the long direction but not in the short direction. Also, the position of 1E 1740.7-2942 was determined with a statistical accuracy of similar to0." 06 in the right ascension and in the declination, thanks to Chandra's unprecedented spatial resolution. It is about from the radio position, but the difference is well within the uncertainty in the absolute aspect solutions of the observation. The dispersed HETGS spectra of 1E 1740.7-2942 show evidence for the presence of weak, narrow emission lines, although the statistics are quite limited. We discuss possible origins of the extended emission and the implications of the emission lines MH - Argentina MH - France MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166939900035 L2 - binaries : general;stars : individual (1E 1740.7+2942);X-rays : stars;MOLECULAR CLOUD; GALACTIC-CENTER; SOURCE 1E1740.7-2942; 1E-1740.7-2942; ASCA; SCATTERING; REGION; IMAGES SO - Astrophysical Journal 2001 ;548(1):394-400 2711 UI - 12472 AU - Cumming JS AU - Slade SG AU - Chayet A AD - C&C Vis Corp, Aliso Viejo, CA 92656, USACtr Laser, Houston, TX, USAInst Oftalmol, Tijuana, Baja California, MexicoCumming, JS, C&C Vis Corp, 6 Journey,Suite 270, Aliso Viejo, CA 92656 USA TI - Clinical evaluation of the model AT-45 silicone accommodating intraocular lens - Results of feasibility and the initial phase of a food and drug administration clinical trial AB - Objective: To evaluate the clinical outcomes in cataract patients after implantation of an accommodating intraocular lens, designed to move forward and backward along the visual axis. Design: Prospective, noncomparative case series. Participants: Sixty-two patients scheduled for small-incision, extracapsular cataract extraction by phacoemulsification. Methods: Twenty-eight eyes of 14 patients in the feasibility phase of the study and 48 eyes of 48 patients in the next phase of study underwent cataract extraction and implantation of the AT-45 accommodating intraocular lens. Prospective follow-up was analyzed at 1 month after surgery and compared with baseline characteristics 1 month and 3 to 6 months after surgery. Main Outcome Measures; Postoperative distance (uncorrected and best corrected), near (uncorrected, through the distance correction, best-corrected, i.e., with add), and intermediate (through the distance correction) visual acuity. Results: All patients with monocular pseudophakia had best-corrected distance visual acuity of 20/40 or better. Patients with bilateral pseudophakia had best-corrected visual acuity of 20/25 or better when tested binocularly. The results from 28 eyes of 14 patients participating in the feasibility study were combined with those from 48 eyes of 48 patients included in the next phase of the AT-45 study. Uncorrected distance visual acuity was 20/40 or better in most patients (90%, or 56 of 62 eyes implanted and available for follow-up). Ninety-seven percent of patients (60/62) had uncorrected near visual acuity of 20/30 or better. Forty-eight eyes had intermediate visual acuity measured at 28 inches without 'add', and 44 of them (92%) achieved 20/30 or better. No complications or adverse events were reported. Conclusions: The AT-45 accommodating intraocular lens, designed to allow movement along the visual axis of the eye by using the natural physiology of the intact ciliary muscle after cataract removal, provides patients with excellent uncorrected distance, intermediate, and near visual acuity and should be considered as a modality to allow the majority of pseudophakic patients to see at all distances without glasses. Ophthalmology 2001;108: 2005-2010 (C) 2001 by the American Academy of Ophthalmology MH - Mexico|Baja California MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 62 U4 - Ophthalmology U5 - J;Article AV - English IS - 0161-6420 UR - ISI:000171964500028 L2 - PLATE-HAPTIC SILICONE; IMPLANTATION; ASTIGMATISM; PIECE; EYES SO - Ophthalmology 2001 ;108(11):2005-2009 2712 UI - 11655 AU - Cuzon G AU - Rosas C AU - Gaxiola G AU - Taboada G AU - van Wormhoudt A AD - COP, Taravao, Tahiti, Fr PolynesiaUNAM, Fac Ciencias, Grp Biol Marina Expt, IFREMER Cd Carmen, Campeche, MexicoMuseum Natl Hist Nat, Stn Biol Marine, F-29900 Concarneau, FranceColl France, F-29900 Concarneau, FranceRosas, C, Apdo Post 69, Campeche, Mexico TI - Effect of dietary carbohydrates on gluconeogenesis in premolt Litopenaeus stylirostris juveniles and pre adults AB - Because in the premolt stage L. stylirostris should produce glycogen to prepare chitin synthesis, the present paper was directed to answer the following questions: (a) Could an absence of dietary carbohydrates (CHO) enhance the gluconeogenesis pathway in premolt shrimp, following the trend in species of carnivorous fish? (b) In premoulting shrimp is it necessary to force the glyconeogenic pathway through intensive feeding or is a two meal/day feeding schedule enough? (c) Is the CHO metabolism adaptation affected by the age of shrimp? and (d) are the same mechanisms working in moult stage C and D?. A comparison with shrimp fed the same diets and in stage C has been done to determine the effect of the molt stage and dietary CHO levels in glycogen accumulation of this shrimp species. Results obtained showed that in stage D shrimp the gluconeogenlic pathway was enhanced, both in an intensive or in a two meal/day feeding schedule, independently of the age of the shrimp. The accumulation of glycogen to support both chitin synthesis and metabolic glucose is proposed as an explanation. Comparing the results obtained in the present paper with that of L. stylirostris juveniles published earlier, it is possible to observe that both in 12 hour fasting and during glycemia, the glycogen concentration in stage C shrimp was opposite of that observed in stage D shrimp. These results show that the intensity of the gluconeogenesis pathway changes with the molting stage, being of more importance in the premolt stage (D) than during the intermoult stage (C) MH - Fr Polynesia MH - France MH - Mexico|Campeche PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 6 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000174127300004 L2 - carbohydrate metabolism;gluconeogenesis;digestive gland;blue shrimp Litopenaeus stylirostris;molt stage;juveniles;glycogen;OXYGEN-CONSUMPTION; AMMONIA EXCRETION; PENAEUS-SETIFERUS; METABOLISM; PROTEIN; CRUSTACEA; DECAPODA; SHRIMP; CYCLE; PRAWN SO - Journal of Shellfish Research 2001 ;20(3):931-937 2713 UI - 11832 AU - Czerw R AU - Terrones M AU - Charlier JC AU - Blase X AU - Foley B AU - Kamalakaran R AU - Grobert N AU - Terrones H AU - Tekleab D AU - Ajayan PM AU - Blau W AU - Ruhle M AU - Carroll DL AD - Clemson Univ, Dept Phys & Astron, Clemson, SC 29634, USAMax Planck Inst Met Res, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoUniv Catholique Louvain, Unite Physicochim & Phys Mat, B-1348 Louvain, BelgiumUniv Lyon 1, Dept Phys Mat, F-69622 Villeurbanne, FranceUniv Dublin Trinity Coll, Dept Phys, Dublin 2, IrelandUniv Sussex, Fullerene Sci Ctr, CPES, Brighton BN1 9QJ, E Sussex, EnglandRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USACzerw, R, Clemson Univ, Dept Phys & Astron, Clemson, SC 29634, USA TI - Identification of electron donor states in N-doped carbon nanotubes AB - Nitrogen-doped carbon nanotubes have been synthesized using pyrolysis and characterized by scanning tunneling spectroscopy and transmission electron microscopy. The doped nanotubes are all metallic and exhibit strong electron donor states near the Fermi level. Using tight-binding and ab initio calculations, we observe that pyridine-like N structures are responsible for the metallic behavior and the prominent features near the Fermi level. These electron rich structures are the first example of n-type nanotubes, which could pave the way to real molecular heterojunction devices MH - Belgium MH - United Kingdom MH - France MH - Germany MH - Ireland MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 106 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000173721500002 L2 - IN-SITU; PYROLYSIS; GROWTH; HETEROJUNCTIONS; NANOFIBERS; MIXTURES; NITRIDE SO - Nano Letters 2001 ;1(9):457-460 2714 UI - 13484 AU - D'Alessio P AU - Calvet N AU - Hartmann L AD - Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAD'Alessio, P, Amer Museum Nat Hist, Dept Astrophys, Cent Pk W & 79th St, New York, NY 10024 USA TI - Accretion disks around young objects. III. Grain growth AB - We present detailed models of irradiated T Tauri disks including dust grain growth with power-law size distributions. The models assume complete mixing between dust and gas and solve for the vertical disk structure self-consistently including the heating effects of stellar irradiation as well as local viscous heating. For a given total dust mass, grain growth is found to decrease the vertical height of the surface where the optical depth to the stellar radiation becomes unity and thus the local irradiation heating, while increasing the disk emission at mm and submillimeter wavelengths. The resulting disk models are less geometrically thick than our previous models assuming interstellar medium dust, and agree better with observed spectral energy distributions and images of edge-on disks, like HK Tau/c and HH 30. The implications of models with grain growth for determining disk masses from long-wavelength emission are considered MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 131 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000169280400028 L2 - accretion, accretion disks;circumstellar matter;stars : formation;stars : pre-main-sequence;T-TAURI-STARS; SPECTRAL ENERGY-DISTRIBUTIONS; CIRCUMSTELLAR DISKS; OPTICAL-CONSTANTS; SOLAR NEBULA; DUST; IRRADIATION; EMISSION SO - Astrophysical Journal 2001 ;553(1):321-334 2715 UI - 13723 AU - D'Urzo AD AU - De Salvo MC AU - Ramirez-Rivera A AU - Almeida J AU - Sichletidis L AU - Rapatz G AU - Kottakis J AD - Novartis Pharmaceut, Novartis HRC, Horsham RH12 5AB, W Sussex, EnglandPrimary Care Asthma Clin, Toronto, ON, CanadaHosp Gen Agudis E Tornu, Buenos Aires, DF, ArgentinaHosp Enfermedades Cardiovasc & Torax, IMSS, Monterrey, MexicoHosp Sao Joaa, Serv Pneumol, Porto, PortugalUniv Thessaloniki, Papanicolaou Hosp, Pneumol Clin, GR-54006 Salonika, GreeceKottakis, J, Novartis Pharmaceut, Novartis HRC, Wimblehurst Rd, Horsham RH12 5AB, W Sussex, England TI - In patients with COPD, treatment with a combination of formoterol and ipratropium is more effective than a combination of salbutamol and ipratropium - A 3-week, randomized, double-blind, within-patient, multicenter study AB - Study objectives: To compare the efficacy of adding formoterol or salbutamol to regular ipratropium bromide treatment in COPD patients whose conditions were suboptimally controlled with ipratropium bromide alone. Design: A randomized, double-blind, double-dummy, two-period, crossover clinical trial. Setting: Twenty-four clinics and university medical centers in nine countries. Patients: One hundred seventy-two patients with baseline FEV1, less than or equal to 65% predicted, with FEV, reversibility to salbutamol not exceeding the normal variability of the measurement, and symptomatic despite regular treatment with ipratropium bromide. Interventions: Each patient received two treatments in random order: either inhaled formoterol dry powder, 12 mug bid, in addition to ipratropium bromide, 40 mug qid for 3 weeks, followed by salbutamol, 200 mug qid, in addition to ipratropium, 40 mug qid for 3 weeks, or vice versa. Measurements and results: Efficacy end points included morning premedication peak expiratory now (PEF) during the last week of treatment (primary end point), the area under the curve (AUC) for FEV, measured for 6 h after morning dose on the last day of treatment, and symptom scores (from daily diary recordings). Morning PEF and the AUC for FEV,were significantly better for formoterol/ipratropium than for salbutamol/ipratropium (p = 0.0003 and p < 0.0001, respectively). The formoterol/ipratropium combination also induced a greater improvement in mean total symptom scores (p = 0.0042), The safety profile of the two treatments was comparable. Conclusions: In COPD patients requiring combination bronchodilator treatment, the addition of formoterol to regular ipratropium treatment is more effective than the addition of salbutamol MH - Argentina MH - Canada MH - United Kingdom MH - Greece MH - Mexico|Nuevo Leon MH - Portugal PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 45 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000168711400011 L2 - beta(2)-agonist;COPD;formoterol;ipratropium;salbutamol;OBSTRUCTIVE PULMONARY-DISEASE; AIR-FLOW LIMITATION; SEVERE ASTHMA; STABLE COPD; SALMETEROL; BROMIDE; MANAGEMENT; DURATION; AGONIST; THERAPY SO - Chest 2001 ;119(5):1347-1356 2716 UI - 12949 AU - da Hora RR AU - Feneron R AU - Valenzuela J AU - Favila ME AU - Fresneau D AD - Univ Paris 13, Lab Ethol Expt & Comparee, CNRS, ESA 7025, F-93430 Villetaneuse, FranceInst Ecol, Xalapa 91000, Veracruz, MexicoFeneron, R, Univ Paris 13, Lab Ethol Expt & Comparee, CNRS, ESA 7025, 99 Ave JB Clement, F-93430 Villetaneuse, France TI - Queen-size dimorphism in the ant Ectatomma tuberculatum (Hymenoptera : Formicidae : Ponerinae) AB - Queen dimorphism is known in different ant subfamilies and corresponds to the co-occurrence of several queen morphs within the same species. It is frequently associated with different colony-founding and dispersion strategies. We studied the queen-size dimorphism in the Ponerinae ant, Ectatomma tuberculatum from field colonies collected at Apazapan (Veracruz, Mexico). Microgynes were present in half the colonies collected and their production among the female sexuals prevailed over that of macrogynes. Colonies possessed one or several gynes, up to 8 for macrogynes and 11 for microgynes. From the data basis on nest excavation, worker size population was correlated neither with the number of dealate gynes nor with the number of microgynes, and it seemed that microgynes were as productive as macrogynes. Both gynes were morphologically similar but their distribution was clearly bimodal without overlapping, the microgynes being not completely separated from the workers. Microgynes fell on a continuous regression line with the macrogynes and represented the isometric reduction of normal queens. The ovarian morphology differed among the three female groups: macrogynes had the most numerous ovarioles on average but produced as many oocytes as microgynes. Contrary to the workers, all gynes possessed a developed spermatheca and had the potential ability to lay fertilized eggs. Such queen dimorphism was not previously observed in this species and only found in the Apazapan site. It may constitute an alternative reproductive strategy leading to a functional facultative polygyny, as already reported in E. ruidum (Schatz et al. 1996, Lachaud et al. 1999a, b), or a case of a social intraspecific parasitism. Further investigations are being conducted to better understand the reproductive biology of this species MH - France MH - Mexico|Veracruz PB - CHICO: CALIF STATE UNIV RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0361-6525 UR - ISI:000170759700009 L2 - macrogynes;microgynes;Ponerinae;ants;Ectatomma;REPRODUCTIVE STRATEGIES; POLYMORPHISM; WORKERS; FORMS SO - Sociobiology 2001 ;38(3A):407-420 2717 UI - 12771 AU - Daessle LW AU - Fischer DW AD - Univ Autonoma Baja Calif, Inst Invest Oceanol, Ensenada, Baja California, MexicoUniv Autonoma Baja Calif, Fac Ciencias Marinas, Ensenada, Baja California, MexicoDaessle, LW, PMB 133,Box 189003, Coronado, CA 92178, USA TI - Marine minerals in the Mexican Pacific: Toward efficient resource management AB - Vast reserves of marine minerals are known to occur within the Mexican Exclusive Economic Zone. These reserves include: (I) heavy mineral placers rich in titanium and iron along the coast of San Antonio del Mar, Baja California and the southern States of Oaxaca and Guerrero; (2) phosphorites, which represent the only source for superphosphate fertilizers along the Pacific coast off the Baja California peninsula and the Gulf of Tehuantepec; and (3) manganese oxide deposits in nodule and crusts located adjacent to the Clarion-Clipperton Zone and containing high concentrations of Cu+Ni+Co (up to 1.9%), which are essential for the steel and superalloy industries. Few but important efforts toward surveying these deposits have been carried out by Mexican and international researchers. Relevant data generated by these investigations are reviewed here and put together in a single document. Adequate knowledge of Mexican mineral resources is essential for the development of management strategies when offshore mining starts during this century. Thus, the review discusses the economics inherent to ocean mining in Mexico, setting baselines for future exploration and development activities in the Mexican Exclusive Economic Zone MH - Mexico|Baja California MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Ocean;Engineering, Geological;Oceanography;Mining & Mineral Processing U5 - J;Article AV - English IS - 1064-119X UR - ISI:000171228200005 L2 - marine minerals;Mexico;Pacific;placers;phosphorites;manganese nodules;crusts;economics;CLARION-ISLAND; GEOCHEMISTRY; SEDIMENTS; NODULE SO - Marine Georesources & Geotechnology 2001 ;19(3):197-206 2718 UI - 12955 AU - Damzen MJ AU - Trew M AU - Rosas E AU - Crofts GJ AD - Univ London Imperial Coll Sci & Technol, Blackett Lab, London SW7 2BW, EnglandInst Tecnol Toluca, Optoelect Labs, Metepec 52140, MexicoDamzen, MJ, Univ London Imperial Coll Sci & Technol, Blackett Lab, London SW7 2BW, England TI - Continuous-wave Nd : YVO4 grazing-incidence laser with 22.5 W output power and 64% conversion efficiency AB - Very high-efficiency and high-power operation of a continuous-wave Nd:YVO4 laser is demonstrated using a grazing-incidence geometry with diode side pumping. With 35 W diode bar pumping, multimode output power of 22.5 W (optical-to-optical conversion efficiency of 64%) with slope efficiency of 72%, and single mode output power of 13.8 W (conversion efficiency of 40%) is produced at wavelength 1064 mn. Small-signal gain and thermal lensing in the amplifier are investigated to explain the very high efficiency and spatial characteristics of the laser system. (C) 2001 Published by Elsevier Science B.V MH - United Kingdom MH - Mexico|Estado De Mexico PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 33 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000170722200029 L2 - neodymium;diode-pumped;solid-state laser;SLAB LASER; YAG SO - Optics Communications 2001 ;196(1-6):237-241 2719 UI - 14319 AU - Das G AU - Gould DS AU - Augustine MM AU - Fragoso G AU - Sciutto E AU - Stroynowski I AU - Van Kaer L AU - Schust DJ AU - Ploegh H AU - Janeway CA AD - Yale Univ, Sch Med, Immunobiol Sect, New Haven, CT 06520, USAHoward Hughes Med Inst, New Haven, CT 06520, USAHarvard Univ, Sch Med, Dept Pathol, Boston, MA 02115, USAVanderbilt Univ, Sch Med, Dept Microbiol & Immunol, Nashville, TN 37232, USAVanderbilt Univ, Sch Med, Howard Hughes Med Inst, Nashville, TN 37232, USAUniv Texas, SW Med Ctr, Ctr Immunol, Dallas, TX 75235, USAUniv Texas, SW Med Ctr, Dept Microbiol, Dallas, TX 75235, USAUniv Texas, SW Med Ctr, Dept Internal Med, Dallas, TX 75235, USAUniv Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoDas, G, Yale Univ, Sch Med, Immunobiol Sect, 333 Cedar St, New Haven, CT 06520 USA TI - Qa-2-dependent selection of CD8 alpha/alpha T cell receptor alpha/beta(+) cells in murine intestinal intraepithelial lymphocytes (vol 192, pg 1521, 2000) MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Medicine, Research & Experimental U5 - J;Correction AV - English IS - 0022-1007 UR - ISI:000166902900015 SO - Journal of Experimental Medicine 2001 ;193(3):413-413 2720 UI - 12456 AU - Davalos L AU - Melo L AU - Davalos N AU - Figuera LE AD - IMSS, CIBO, Dept Genet, Guadalajara, Jalisco, MexicoUniv Guadalajara, CUCS, Guadalajara 44430, Jalisco, MexicoHosp Ortoped Infantil, Caracas, Venezuela TI - Russell-Silver syndrome: A family with autosomal recessive inheritance MH - Mexico|Jalisco MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648900611 SO - American Journal of Human Genetics 2001 ;69(4):288-288 2721 UI - 13989 AU - Davies DA AU - Schnik C AU - Silver J AU - Sosa-Sanchez JL AU - Riby PG AD - Univ Greenwich, Dept Chem & Life Sci, London SE18 6PF, EnglandUniv Autonoma Puebla, Inst Ciencias, Ctr Invest Dispositivos Semicond, Puebla, MexicoSilver, J, Univ Greenwich, Dept Chem & Life Sci, Woolwich Campus,Wellington ST, London SE18 6PF, England TI - A high-yield microwave heating method for the preparation of (phthalocyaninato)bis(chloro)silicon(IV) AB - The microwave heating synthesis of (phthalocyaninato)bis(chloro)silicon(Iv) prepared from diiminoisoindolene and silicon tetrachloride in quinoline has been shown to be rapid (5 min reaction time compared to 30 min with thermal heating) and results in a high yield (91% compared to 71% using thermal heating). A modified microwave ashing furnace was used to heat the reaction mixture. The high yield has led to a reduction in the purification time to I h (compared to 4 h or more using conventional heating). Copyright (C) 2001 John Wiley & Sons, Ltd MH - United Kingdom MH - Mexico|Puebla PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1088-4246 UR - ISI:000167879500002 L2 - silicon phthalocyanine;microwave;synthesis SO - Journal of Porphyrins and Phthalocyanines 2001 ;5(4):376-380 2722 UI - 12902 AU - Davila MM AU - Elizalde MP AU - Mattusch J AU - Wennrich R AD - Univ Autonoma Puebla, Fac Ciencias Quim, Puebla 72571, MexicoUniv Autonoma Puebla, Ctr Quim, Puebla 72571, MexicoCtr Environm Res Leipzig Halle, Dept Analyt Chem, D-04318 Leipzig, GermanyDavila, MM, Univ Autonoma Puebla, Fac Ciencias Quim, Apdo Postal J-55, Puebla 72571, Mexico TI - Study of the composite electrodes carbon-polyvinyl chloride and carbon-polyvinyl chloride/Nafion by ex situ and in situ methods AB - The electrochemical response of the composite electrodes carbon-polyvinyl chloride and carbon-polyvinyl chloride/Nafion was studied in various aqueous electrolytes. Ex situ studies using AFM, SEM and EDS showed that after prolonged electrochemical pretreatment by repetitive potential cycling between - 0.3 and 1.3 V in 0.1 M H2SO4, changes occur to the surface composition, topography and morphology of the electrodes. In situ studies with electrochemical techniques using electrodes pretreated with carbon-polyvinyl chloride and modified with ruthenium-phenanthroline complex exhibited electrochemical activity for redox systems, as well as selectivity in the determination of dopamine in a solution containing excess ascorbic acid. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000170862000018 L2 - carbon-polyvinyl chloride composite;electrode modification;Nafion;voltammetry;GLASSY-CARBON; MONOOXORUTHENIUM(V) COMPLEX; PYROLYTIC-GRAPHITE; FORCE MICROSCOPY; INTERCALATION; OXIDATION; ACID SO - Electrochimica Acta 2001 ;46(20-21):3189-3197 2723 UI - 12532 AU - Dawson DA AU - Gorostiza LG AU - Wakolbinger A AD - Fields Inst, Toronto, ON, CanadaCtr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Frankfurt, D-6000 Frankfurt, GermanyDawson, DA, Fields Inst, Toronto, ON, Canada TI - Occupation time fluctuations in branching systems AB - We consider particle systems in locally compact Abelian groups with particles moving according to a process with symmetric stationary independent increments and undergoing one and two levels of critical branching. We obtain long time fluctuation limits for the occupation time process of the one- and two-level systems. We give complete results for the case of finite variance branching, where the fluctuation limits are Gaussian random fields, and partial results for an example of infinite variance branching, where the fluctuation limits are stable random fields. The asymptotics of the occupation time fluctuations are determined by the Green potential operator G of the individual particle motion and its powers G(2), G(3), and by the growth as t --> infinity of the operator G(t) = integral (t)(0) T-s ds and its powers, where T-t is the semigroup of the motion. The results are illustrated with two examples of motions: the symmetric alpha -stable Levy process in R-d (0 < alpha less than or equal to 2), and the so called c-hierarchical random walk in the hierarchical group of order N (0 < c < N). We show that the two motions have analogous asymptotics of G(t) and its powers that depend on an order parameter gamma for their transience/recurrence behavior. This parameter is gamma = d/alpha - 1 for the alpha -stable motion, and gamma = logc/log(N/c) for the c-hierarchical random walk. As a consequence of these analogies, the asymptotics of the occupation time fluctuations of the corresponding branching particle systems are also analogous. In the case of the c-hierarchical random walk, however, the growth of G(t) and its powers is modulated by oscillations on a logarithmic time scale MH - Canada MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 15 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0894-9840 UR - ISI:000171744500006 L2 - multilevel branching particle system;occupation time;fluctuation;Green potential;weak and strong transience;stable Levy process;hierarchical random walk;critical dimensions;LARGE DEVIATIONS; BROWNIAN-MOTION; POPULATIONS; PERSISTENCE; MODEL SO - Journal of Theoretical Probability 2001 ;14(3):729-796 2724 UI - 13126 AU - de Anda GFV AU - Lachmann RA AU - Verbrugge SJC AU - Gommers D AU - Haitsma JJ AU - Lachmann B AD - Erasmus Univ, Dept Anesthesiol, NL-3000 DR Rotterdam, NetherlandsHosp Especialidades Dr Bernardo Sepulveda G, Unidad Cuidados Intensivos, Ctr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Mexico City, DF, MexicoLachmann, B, Erasmus Univ, Dept Anesthesiol, Room Ee 2393,POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Partial liquid ventilation improves lung function in ventilation-induced lung injury AB - Disturbances in lung function and lung mechanics are present after ventilation with high peak inspiratory pressures (PIP) and low levels of positive end-expiratory pressure (PEEP). Therefore, the authors investigated whether partial liquid ventilation can re-establish lung function after ventilation-induced lung injury. Adult rats were exposed to high PIP without PEEP for 20 min. Thereafter, the animals were randomly divided into five groups. The first group was killed immediately after randomization and used as an untreated control. The second group received only sham treatment and ventilation, and three groups received treatment with perfluorocarbon (10 mL.kg(-1), 20 mL.kg(-1), and 20 ml.kg(-1) plus an additional 5 mL.kg(-1) after I h). The four groups were maintained on mechanical ventilation for a further 2-h observation period. Blood gases, lung mechanics, total protein concentration, minimal surface tension, and small/large surfactant aggregates ratio were determined. The results show that in ventilation-induced lung injury, partial liquid ventilation with different amounts of perflubron improves gas exchange and pulmonary function, when compared to a group of animals treated with standard respiratory care. These effects have been observed despite the presence of a high intra-alveolar protein concentration, especially in those groups treated with 10 and 20 mL of perflubron. The data suggest that replacement of perfluorocarbon, lost over time, is crucial to maintain the constant effects of partial liquid ventilation MH - Mexico|Distrito Federal MH - Netherlands PB - SHEFFIELD: EUROPEAN RESPIRATORY SOC JOURNALS LTD RP - NOT IN FILE U3 - TC 4 U4 - Respiratory System U5 - J;Article AV - English IS - 0903-1936 UR - ISI:000170281400013 L2 - mechanical ventilation;partial liquid ventilation;ventilation-induced lung injury;END-EXPIRATORY PRESSURE; RESPIRATORY-DISTRESS SYNDROME; EXOGENOUS SURFACTANT THERAPY; GAS-EXCHANGE; MECHANICAL VENTILATION; PULMONARY-EDEMA; MODEL; PERFLUOROCARBON; RATS; INSTILLATION SO - European Respiratory Journal 2001 ;18(1):93-99 2725 UI - 13944 AU - de Anda GFV AU - Lachmann RA AU - Gommers D AU - Verbrugge SJ AU - Haitsma J AU - Lachmann B AD - Erasmus Univ, Dept Anesthesiol, NL-3000 Rotterdam, NetherlandsHosp Especialidades Dr Bernardo Sepulveda G, Unidad Cuidados Intens, Ctr Med Nacl Siglo 21, Inst Mexicano Seguro Social, Mexico City 06725, DF, MexicoLachmann, B, Erasmus Univ, Dept Anesthesiol, Room EE 2293,POB 1738, NL-3000 Rotterdam, Netherlands TI - Treatment of ventilation-induced lung injury with exogenous surfactant AB - Objective: It has been demonstrated that pulmonary surfactant plays a role in the pathophysiology of ventilation-induced lung injury (VILI). Therefore, we investigated whether exogenous surfactant might restore lung function and lung mechanics in an established model of VILI. Design: Prospective, randomized, animal study. Setting: Experimental laboratory of a university. Subjects: Twenty-four adult male Sprague-Dawley rats. Interventions: First, a group of six animals were killed immediately after induction of anesthesia and used as healthy controls. Then, in 18 rats, VILI was induced by increasing peak inspiratory pressure (PIP) to 45 cmH(2)O without positive end-expiratory pressure (PEEP) for 20 min. Thereafter, animals were randomly divided into three groups of six animals each: one group was killed immediately after VILI and served as VILI-control. In the other two groups, ventilator settings were changed to a PIP of 30 cmH(2)O and a PEEP of 10 cmH(2)O, and a respiratory rate of 40 bpm. One group received a bolus of surfactant and the other group received no treatment. Measurements ann results: Blood gas tension and arterial blood pressures were recorded every 30 min for 2 h. After the study period, a pressure-volume curve was recorded. Then, a broncho-alveolar lavage (BAL) was performed to determine protein content, minimal surface tension, and surfactant composition in the BAL fluid. Oxygenation, lung mechanics, surfactant function and composition were significantly improved in the surfactant-treated group compared to the ventilated and non-ventilated control groups. Conclusion: We conclude that exogenous surfactant can be used to treat VILI MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Critical Care Medicine U5 - J;Article AV - English IS - 0342-4642 UR - ISI:000168068000016 L2 - ventilation-induced lung injury;mechanical ventilation;pulmonary surfactant;animal;rat;END-EXPIRATORY PRESSURE; PULMONARY-EDEMA; THERAPY; MODEL; HYPERVENTILATION; STRATEGIES; CONVERSION; RATS SO - Intensive Care Medicine 2001 ;27(3):559-565 2726 UI - 14456 AU - de la Cruz GV AU - Torres JA AU - Martin-Polo MO AD - Oregon State Univ, Dept Food Sci & Technol, Corvallis, OR 97331, USAUniv Autonoma Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, Queretaro Qro 76010, MexicoTorres, JA, Oregon State Univ, Dept Food Sci & Technol, 100 Wiegand Hall, Corvallis, OR 97331 USA TI - Temperature effect on the moisture sorption isotherms for methylcellulose and ethylcellulose films AB - Moisture sorption isotherms were obtained at 9 degreesC, 15 degreesC, 20 degreesC, 25 degreesC and 35 degreesC for methylcellulose (MC) and ethylcellulose (EC) films following the normalized microclime method. Cast MC and EC film samples were equilibrated to 0.22, 0.44, 0.57, 0.75, and 0.90 a(w) values. MC films had an equilibrium moisture content about five times higher than the EC films. The Guggenheim-Anderson-deBoer (GAB) and Brunauer-Emmett-Teller (BET) equations were fitted to the experimental data using nonlinear regression. The regression coefficient (R-2) used to evaluate model fit showed a best fit for the GAB model. The monolayer moisture content (x(m)) decreased with temperature and correlated better with values calculated using the BET equation. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000166533100011 L2 - ethylcellulose;methylcellulose;moisture sorption;isotherms;WATER-VAPOR; ADSORPTION; RAISINS; FOODS SO - Journal of Food Engineering 2001 ;48(1):91-94 2727 UI - 12921 AU - de la Cruz MO AU - Solis FJ AU - Gonzalez-Mozuelos P AD - Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208, USACINVESTAV, Dept Phys, Mexico City, DF, Mexico TI - Polyelectrolytes and multivalent salt solutions MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690102042 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U366-U366 2728 UI - 12143 AU - de la Cruz MV AU - Markwald RR AU - Krug EL AU - Rumenoff L AU - Gomez CS AU - Sadowinski S AU - Galicia TD AU - Gomez F AU - Garcia MS AU - Guzman LV AU - Angeles LR AU - Moreno-Rodriguez RA AD - Med Univ S Carolina, Dept Cell Biol & Anat, Charleston, SC 29425, USAHosp Infantil Mexico Dr Federico Gomez, Dept Biol Desarrollo & Teratogenesis, Mexico City, DF, MexicoUniv Centroccidental Barquisimeto, Fac Med, Dept Anat Patol, Barquisimeto, VenezuelaHosp Infantil Mexico Dr Federico Gomez, Dept Patol Clin & Expt, Mexico City, DF, MexicoMarkwald, RR, Med Univ S Carolina, Dept Cell Biol & Anat, 171 Ashley Ave, Charleston, SC 29425 USA TI - Living morphogenesis of the ventricles and congenital pathology of their component parts AB - Living morphogenetic studies show that each definitive ventricle is constructed from different primitive cardiac segments, and each has its specific anatomical features. These ventricular segments are the atrioventricular junction; the primitive inlet segment, part of the primary heart tube, which initially provides the inlets of each ventricle; the primitive outlet segment, which gives rise to both ventricular outlets; and the apical trabeculated regions of the right and left ventricles which grow from the primary heart tube, respectively. In this review, we describe regional pathology based on the relationship of these primitive ventricular components. We propose that the abnormal morphogenesis of one of these segments gives origin to regional ventricular pathology. For example, abnormal embryogenesis of the atrioventricular canal produces malformations of the atrioventricular junctions, such as double inlet ventricle, absence of one atrioventricular connection, and straddling and overriding atrioventricular valves. Similarly, abnormal morphogenesis of the primitive outlet segment gives rise to malformations of the subarterial region of each ventricle, along with the valves guarding these vessels. The principal anatomical features of these malformations of the ventricular inlets and outlets are described, and their possible morphogenesis is discussed. Due to the fact that the apical trabeculated region of each ventricle arises from a separate primitive segment, each ventricle can be identified according to the pattern of its apical trabeculations. This feature is crucial in the elucidation of complex congenital pathology, such as discordant atrioventricular connections MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - LONDON: GREENWICH MEDICAL MEDIA LTD RP - NOT IN FILE U3 - TC 6 U4 - Cardiac & Cardiovascular Systems;Pediatrics U5 - J;Review AV - English IS - 1047-9511 UR - ISI:000172857800002 L2 - regional congenital ventricular pathology primitive cardiac segments;cardiac defects;congenital cardiac malformation;discordant atrioventricular connections;CHICK-EMBRYO; COMPLETE TRANSPOSITION; ENDOCARDIAL CUSHION; GREAT-ARTERIES; HEART; DIFFERENTIATION; SEPTATION; CHAMBER; VALVES; CELLS SO - Cardiology in the Young 2001 ;11(6):588-600 2729 UI - 11023 AU - de la Garza M AU - Ros-Yanez T AU - Colas R AU - Houbaert Y AD - Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, Nuevo Leon, MexicoState Univ Ghent, Dept Met & Mat Sci, Lab Iron & Steelmaking, B-9052 Zwijnaarde, BelgiumColas, R, Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, AP 149-F, San Nicolas De Los Garza 66451, Nuevo Leon, Mexico TI - Study of precipitates formed in a wrought aluminum alloy by means of atomic force microscopy AB - A study of the particles precipitated during heat treating a Type 6061 wrought aluminum alloy was carried out by means of atomic force microscopy and scanning electron microscopy (SEM). The specimens were cut from hot-extruded bars and were heat-treated to peak hardness and overaged stages to obtain precipitates of different sizes. The samples were prepared by standard metallographic techniques before being examined with either type of microscope. Observations with the atomic force microscope (AFM) were made in the topographic and lateral force modes, as each method yields different information. The former mode is issued to identify the particles and measure their size and shape, whereas the latter allows for data related to superficial characteristics, It is concluded that both types of microscopic examinations complement each other and that they can be used in conjunction to obtain a deeper understanding of precipitation behaviour and kinetics, (C) 2001 Elsevier Science Inc. All rights reserved MH - Belgium MH - Mexico|Nuevo Leon PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 1044-5803 UR - ISI:000175868300006 L2 - aging;aluminum alloys;heat treating;atomic force microscopy SO - Materials Characterization 2001 ;47(5):397-400 2730 UI - 13151 AU - de la Mora MA AU - Cuevas E AU - Muchowski JM AU - Cruz-Almanza R AD - UNAM, Inst Quim, Mexico City 04510, DF, MexicoRoche Biosci, Palo Alto, CA 94304, USACruz-Almanza, R, UNAM, Inst Quim, Circuito Exterior,Ciudad Univ,Coyoacan, Mexico City 04510, DF, Mexico TI - Synthesis of tricyclic-2-aminoindoles by intramolecular 1,3-dipolar cycloaddition of 1-omega-azidoalkylindoles AB - Thermolysis of the 1-omega -azidoalkylindoles 4, bearing an electron attracting substituent at C-3 (CHO, COMe, COOMe, CN) provides imidazo[1,2-a]indoles (5, n = 1), pyrimidino[1,2-a]indoles (5, n = 2), and 1,3-diazepino[1,2-a]indoles (5, n = 3). (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000170127200005 L2 - cycloaddition;synthesis;pyrimidinol[1,2-a]indoles;imidazo[1,2-a]indoles SO - Tetrahedron Letters 2001 ;42(32):5351-5353 2731 UI - 13410 AU - de la Pena JA AU - Saorin M AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Murcia, Dept Matemat, Espinardo Murcia 30100, Spainde la Pena, JA, Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - On the first Hochschild cohomology group of an algebra AB - Let A = K Delta /I be a factor of a path algebra. We develop a strategy to compute dim H-1(A), the dimension of the first Hochschild cohomology group of A, using combinatorial data from (Delta, I). That allows us to connect dim H-1(A) with the rank and p-rank of the fundamental group pi (1)(Delta, I) of (Delta, I). We get explicit formulae for dim H-1(A), when every path in Delta parallel to an arrow belongs to I or when I is homogeneous MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0025-2611 UR - ISI:000169272200002 SO - Manuscripta Mathematica 2001 ;104(4):431-442 2732 UI - 12538 AU - de la Pena LH AU - Hess PO AU - Levai G AU - Algora A AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoHungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungaryde la Pena, LH, UNAM, Inst Ciencias Nucl, Circuit Exterior,CU,AP 70-543, Mexico City 04510, DF, Mexico TI - alpha-cluster structure in Be isotopes AB - The Be chain of isotopes is investigated within the semimicroscopic algebraic cluster model (SACM). For that the SACM is applied to odd-mass p-shell nuclei. We show that the main features of the Be isotopes can be well explained. Though for the neutron halo nucleus Be-11 some problems remain, the shell model still can roughly describe the structures of halo nuclei. In Be-11 a shell inversion takes place as a result of the high deformation of the system. The quadrupole-quadrupole interaction is found to play a dominant role in the structure of p-shell nuclei MH - Hungary MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0954-3899 UR - ISI:000171746200005 L2 - SEMIMICROSCOPIC ALGEBRAIC DESCRIPTION; ANTISYMMETRIZED MOLECULAR-DYNAMICS; SHELL-MODEL TREATMENT; NEUTRON-RICH NUCLEI; ODD-MASS NUCLEI; LIGHT-NUCLEI; RACAH COEFFICIENTS; ENERGY-LEVELS; STATES; BE-10 SO - Journal of Physics G-Nuclear and Particle Physics 2001 ;27(10):2019-2035 2733 UI - 13028 AU - De la Rosa-Cruz E AU - Dirk CW AU - Rodriguez O AU - Castano VM AD - Ctr Invest Opt AC, Leon 37160, Gto, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAIFUNAM, Juriquilla, MexicoDe la Rosa-Cruz, E, Ctr Invest Opt AC, AP 1-948, Leon 37160, Gto, Mexico TI - Characterization of fluorescence induced by side illumination of rhodamine B doped plastic optical fibers AB - Acrylic plastic optical fibers containing the laser dye Rhodamine B chloride have been drawn from unclad doped acrylic preforms. Different samples of these doped plastic optical fibers were illuminated laterally with a He-Ne laser centered at 543.4 nm and the fluorescence was induced. Experimental results show evidence that the fluorescence peak position and absorption coefficient are determined by the fiber length and dye concentration. A rate of (5.55 +/- 0.32) nm/cm of the fluorescence red shift and (0.41 +/- 0.02)/cm at lambda = 600 nm of the absorption coefficient was obtained by one sample doped at 0.0001 mol% MH - Mexico|Guanajuato MH - Mexico|Queretaro MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0146-8030 UR - ISI:000170619400003 L2 - polymer optical fibers;dye laser;solid state dye laser;organic dyes;STATE DYE-LASER; SPECTROSCOPY SO - Fiber and Integrated Optics 2001 ;20(5):457-464 2734 UI - 13605 AU - de la Rosa JLQ AU - Avila GG AU - Cavazos RG AU - Telo EZ AD - POVISA Med Ctr, Dept Urol, Vigo 36211, SpainUniv Nuevo Leon, Sch Med, Lab Androl, Monterrey, MexicoUniv Nuevo Leon, Sch Med, Dept Genet, Monterrey, Mexicode la Rosa, JLQ, POVISA Med Ctr, Dept Urol, C Salamanca 5, Vigo 36211, Spain TI - Chromosomal translocation 3;22 in an infertile man AB - Objective: To present the first case of an infertile male with a normal phenotype and chromosomal translocation 3;22. Design: Case report. Setting: POVISA Medical Center. Patient(s): A 45-year-old man with primary infertility for 13 years and with different partners; the patient has a family history of recurrent miscarriages and low fertility. Intervention(s): Lymphocytic karyotype and electron microscopy. Main Outcome Measure(s): Physical examination and semen analysis. Result(s): The semen analysis revealed oligoasthenoteratospermia. The lymphocytic karyotype detected a translocation 3,22, and electron microscopy showed a lack of the central microtubule pair and peripheral doublet. Conclusion(s): An association between translocation 3;22 and other abnormalities in infertile males has been reported, but no such association has ever been described in men whose only clinical manifestation is infertility. (Fertil Steril(R) 2001;75:1222-3. (C) 2001 by American Society for Reproductive Medicine.) MH - Mexico|Nuevo Leon MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000168954900029 L2 - infertile male;chromosomal translocation;electron microscopy;lymphocytic karyotype SO - Fertility and Sterility 2001 ;75(6):1222-1223 2735 UI - 13047 AU - De la Rosa VG AU - Ordonez M AU - Llera JM AD - Univ Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, E-41071 Seville, SpainUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoLlera, JM, Univ Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, Apdo Correos 874, E-41071 Seville, Spain TI - Asymmetric synthesis of both diastereomers of protected S-methyl-L-cysteine and S-n-propyl-L-cysteine sulphoxides AB - The preparation of both isomers at Sulphur of N-(benzyloxcarbonyl)-S-methyl (-propyl)-S-oxo-L-cysteine methyl ester has been carried out using L-cysteine and diacetone-D-glucose (DAG) as starting material and inductor or the chirality at sulphur. respectively. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000170447000014 L2 - BRASSICA VEGETABLES; SULFOXIDE; SPARSOMYCIN; ALLIUM; SULFUR; METHIONINE; INHIBITION; COMPONENT SO - Tetrahedron-Asymmetry 2001 ;12(11):1615-1620 2736 UI - 13489 AU - De la Rosa VG AU - Ordonez M AU - Llera JM AD - Univ Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, E-41071 Seville, SpainUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoLlera, JM, Univ Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, Apdo Correos 874, E-41071 Seville, Spain TI - Palladium-catalyzed allylic nucleophilic substitution reactions of (E)-gamma-acetoxy-alpha,beta-unsaturated p-tolylsulfoxides AB - Regio- and diastereoselective nucleophilic allylic substitutions of optically pure (E)-gamma -acetoxy-x,beta -unsaturated p-tolyl-sulfoxides 2 and 3 with sodium dimethyl malonate have been carried out. The reactivity of these substrates is controlled by both the chiral sulfinyl group and the size of the alkyl group attached at the gamma -terminus of the allylic system. This process constitutes an example of palladium-mediated resolution of 1:1 mixture of acetates 2 and 3. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000169249200020 L2 - 4-CHLOROACETOXYALK-2-ENOIC ESTERS; NITROGEN NUCLEOPHILES; ASYMMETRIC-SYNTHESIS; ACID; DIHYDROFURANS; DERIVATIVES; COMPLEXES; SULFONES SO - Tetrahedron-Asymmetry 2001 ;12(7):1089-1094 2737 UI - 13350 AU - De Leon FJG AU - Gonzalez-Garcia L AU - Herrera-Castillo JM AU - Winemiller KO AU - Banda-Valdes A AD - Inst Tecnol Ciudad Victoria, Lab Biol Integrat, Tamaulipas 87010, MexicoWinemiller, KO, Texas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843 USA TI - Ecology of the alligator gar, Atractosteus spatula, in the Vicente Guerrero Reservoir, Tamaulipas, Mexico AB - We provide the first ecological account of the alligator gar, Atractosteus spatula, in the Vicente Guerrero Reservoir, Tamaulipas, Mexico. During March to September, 1998, the local fishery cooperative captured more than 23,000 kg of alligator gar from the reservoir. A random sample of their catch was dominated by males, which were significantly smaller than females. Males and females had similar weight-length relationships. Relative testicular weight varied little seasonally, but relative ovarian weight showed a strong seasonal pattern that indicated peak spawning activity during July and August. Body condition of both sexes also varied in a pattern consistent with late summer spawning. Fishing for alligator gar virtually ceased from October to February, when nonreproductive individuals were presumed to move offshore to deeper water. Alligator gar fed primarily on largemouth bass, Micropterus salmoides, and less frequently on other fishes. The gillnet fishery for alligator gar in the reservoir appears to be based primarily on individuals that move into shallow shoreline areas to spawn. Males probably remain in these habitats longer than females. The dominance of largemouth bass in the alligator gar diet reflects this centrarchid's high occurrence in littoral habitats of the reservoir, and the diet of alligator gar inhabiting deeper habitats of the reservoir could be different MH - Mexico|Tamaulipas MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 4 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000169663100002 L2 - HABITAT SO - Southwestern Naturalist 2001 ;46(2):151-157 2738 UI - 14415 AU - de Leon GPP AU - Jimenez-Ruiz FA AU - Mendoza-Garfias B AU - Garcia-Prieto L AD - Univ Nacl Autonoma Mexico, Lab Helmintol, Inst Biol, Mexico City 04510, DF, MexicoUniv Nebraska, Harold W Manter Lab Parasitol, Lincoln, NE 68588, USADe Leon, GPP, Univ Nacl Autonoma Mexico, Lab Helmintol, Inst Biol, AP 70-153, Mexico City 04510, DF, Mexico TI - Helminth parasites of garter snakes and mud turtles from several localities of the Mesa Central of Mexico AB - Between 1996 and 1998, 212 specimens of aquatic snakes, the Mexican garter snake Thamnophis eques (77) and the black-bellied garter snake Thamnophis melanogaster (135), and 71 Mexican mud turtles Kinosternon hirtipes were collected in 7 localities along the Mesa Central of Mexico. We identified 22 species of helminths from these reptiles. Nematodes represented the most diverse group of helminths in these hosts, with 13 of the 22 species collected (59%). Next were digeneans with 5 species, cestodes with 2, and monogeneans and acanthocephalans with 1 each. In total, 17 new host and 48 new locality records were obtained. Ten of the 22 species infect reptiles accidentally since they frequently occur in sympatric species of freshwater fishes or amphibians, and 12 species are considered common members of the helminth parasite communities of these reptiles. Previous reports of all helminth species found are summarized, and biogeographical affinities of helminths are discussed MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 7 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000166713900002 L2 - helminths;nematodes;digeneans;acanthocephalans;monogeneans;taxonomy;reptiles;Thamnophis melanogaster;black-bellied garter snake;Thamnophis eques;Mexican garter snake;Kinosternon hirtipes;Mexican mud turtle;Mesa Central;Mexico;DIGENEA; YUCATAN SO - Comparative Parasitology 2001 ;68(1):9-20 2739 UI - 11838 AU - de Leon J AU - Souleiman I AU - Glumineau A AU - Schreier G AD - Univ Neuvo Leon, Dept Elect Engn, San Nicolas de Los Garza 66450, Nuevo Leon, MexicoEcole Cent Nantes, Inst Rech Telecommun & Cybernet Nantes, CNRS, UMR 6597, F-44312 Nantes 3, Francede Leon, J, Univ Neuvo Leon, Dept Elect Engn, POB 148-F, San Nicolas de Los Garza 66450, Nuevo Leon, Mexico TI - On nonlinear equivalence and backstepping observer AB - An observer design based on backstopping approach for a class of state affine systems is proposed. This class of nonlinear systems is determined via a constructive algorithm applied to a general nonlinear Multi Input-Multi Output systems. Some examples are given in order to illustrate the proposed methodology MH - France MH - Mexico|Nuevo Leon PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000173656200001 L2 - INPUT-OUTPUT INJECTION; LINEARIZATION; SYSTEMS SO - Kybernetika 2001 ;37(5):521-546 2740 UI - 13438 AU - de los Santos GG AU - Steiner JJ AU - Beuselinck PR AD - USDA ARS, Natl Forage Seed Prod Res Ctr, Corvallis, OR 97331, USAColegio Postgrad Ciencias Ciencias Agr, Montecillo 56230, Texcoco, MexicoUSDA ARS, Plant Genet Res Unit, Columbia, MO 65211, USASteiner, JJ, USDA ARS, Natl Forage Seed Prod Res Ctr, 3450 SW Campus Way, Corvallis, OR 97331 USA TI - Adaptive ecology of Lotus corniculatus L. genotypes: II. Crossing ability AB - Birdsfoot trefoil (Lotus corniculatus L,) is a widely distributed polymorphic Old-World perennial forage legume found in wild and naturalized populations throughout temperate regions of Europe, Asia Minor, North Africa, and North and South America. Exotic birdsfoot trefoil germplasm has rarely been used for birdsfoot trefoil genetic enhancement, and information about its crossing ability with other exotics and commercial qualify germplasm is not available, The objectives of this research were to (i) characterize the crossing ability of 27 exotic birdsfoot trefoil genotypes with two genetically diverse hybridization testers, and (ii) determine if crossing ability among genotypes was related to their genetic background measured by random amplified polymorphic DNA (RAPD) markers and their ecogeographic origins. Crossing ability was determined using reciprocal crosses with one commercial-quality germplasm and one exotic genotype tester, Ah possible crossing combinations for an eight-genotype subset were also determined, Crossing ability was measured as the percentage of pollinated flowers that set pods, FI progeny pollen viability, pod length, and seeds per pod, Self-genotype pod set and pollen viability were not correlated, Intermediate bridge crosses were identified that could potentially overcome specific cross incompatibilities and be used to obtain progeny for any combination of genotypes. Genotype-crossing ability was associated with ecogeographic features of the collecting site, but not with morphologic characteristics, This differs; from findings that other genotype morphologic characteristics are associated with ecogeographic origins and genetic similarities based on RAPD markers. Exotic birdsfoot trefoil genotypes can be utilized with commercial-quality germplasm using conventional crossing methods MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000169469800040 SO - Crop Science 2001 ;41(2):564-570 2741 UI - 13620 AU - de Maagd RA AU - Bravo A AU - Crickmore N AD - Plant Res Int, NL-6700 AA Wageningen, NetherlandsUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Sussex, Sch Biol Sci, Brighton BN1 9QG, E Sussex, Englandde Maagd, RA, Plant Res Int, POB 16, NL-6700 AA Wageningen, Netherlands TI - How Bacillus thuringiensis has evolved specific toxins to colonize the insect world AB - Bacillus thuringiensis is a bacterium of great agronomic and scientific interest. Together the subspecies of this bacterium colonize and kill a large variety of host insects and even nematodes, but each strain does so with a high degree of specificity. This is mainly determined by the arsenal of crystal proteins that the bacterium produces during sporulation. Here we describe the properties of these toxin proteins and the current knowledge of the basis for their specificity. Assessment of phylogenetic relationships of the three domains of the active toxin and experimental results indicate how sequence divergence in combination with domain swapping by homologous recombination might have caused this extensive range of specificities MH - United Kingdom MH - Mexico|Morelos MH - Netherlands PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 111 U4 - Genetics & Heredity U5 - J;Review AV - English IS - 0168-9525 UR - ISI:000168718300020 L2 - PESTICIDAL CRYSTAL PROTEINS; AMINOPEPTIDASE-N RECEPTOR; DELTA-ENDOTOXIN BINDING; BRUSH-BORDER MEMBRANE; CRY1C DOMAIN-III; MANDUCA-SEXTA; HELIOTHIS-VIRESCENS; FUNCTIONAL DOMAINS; SPODOPTERA-EXIGUA; TOXICITY SO - Trends in Genetics 2001 ;17(4):193-199 2742 UI - 12476 AU - de Melo O AU - Puron E AU - Sanchez M AU - Larramendi E AU - Hernandez LC AU - Tobenas S AU - Tamura M AU - Cruz-Gandarilla F AU - Garduno MH AD - Univ Havana, Fac Phys, IMRE, Havana 10400, CubaCtr Res & Adv Studies, Dept Phys, Mexico City 07000, DF, MexicoInst Politecn Nacl, Escuela Super Fis & Matemat, UPALM, Mexico City 07738, DF, MexicoDe Melo, O, Univ Havana, Fac Phys, IMRE, Colina Univ, Havana 10400, Cuba TI - Atomic layer epitaxy by isothermal closed space sublimation AB - Atomic Layer Epitaxy growth of optoelectronic semiconductors ZnTe, CdTe and CdxZn1-xTe and CdSe films is achieved by using a novel isothermal closed space sublimation system. The quality of the films and the Atomic Layer Epitaxy regime was confirmed by X-Rays and electron diffraction, Transmission Electron Microscope observations and composition measurement of the ternary CdxZn1-xTe alloys. The difference in vapor pressures between the elemental source and the growing surface is the driven force for the growth; this difference being zeroed once the surface is completely. ZnTe growth is regulated at 1 ML/cycle while CdTe is regulated at 0.5 ML/cycle MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900004 SO - Modern Physics Letters B 2001 ;15(17-19):579-584 2743 UI - 14428 AU - de Murphy CA AU - Ferro-Flores G AU - Pedraza-Lopez M AU - Melendez-Alafort L AU - Croft BY AU - Ramirez FD AU - Padilla J AD - Inst Nacl Nutr Salvador Zubiran, Dept Nucl Med, Mexico City 14000, DF, MexicoInst Nacl Invest Nucl, Dept Mat Radiact, Salazar 52045, Mexico, MexicoInst Nacl Invest Nucl, Dept Quim, Salazar 52045, Mexico, MexicoNCI, NIH, Bethesda, MD 20892, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09820, DF, Mexicode Murphy, CA, Inst Nacl Nutr Salvador Zubiran, Dept Nucl Med, Vasco Quiroga 15,Delegac Tialpan, Mexico City 14000, DF, Mexico TI - Labelling of Re-ABP with Re-188 for bone pain palliation AB - Etidronate and medronate have been labelled with technetium-99m (Tc-99m-HEDP, Tc-99m-MDP) for bone scanning and, with rhenium-188 (Re-188-HEDP) to palliate the pain resulting from bone metastases. The objective of this study was to label alendronate, ABP, a new bisphosphonate, with SnF2-reduced-Re-188. The reagents for the 5 mg ABP kit were SnF2, KReO4 and gentisic acid at acid pH. The chemical, spectroscopic and microscopic characteristics, quality control, rat bone uptake of [Re-188]Re-ABP and similarities with Tc-99m-ABP are presented. We conclude that this is a promising new radiopharmaceutical for bone metastases pain palliation. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000166648700011 L2 - Re-188-ABP;Re-188-alendronate;Re-188 labelled bisphosphonates;DIPHOSPHONATE; ALENDRONATE; FRAGMENTS; COMPLEXES SO - Applied Radiation and Isotopes 2001 ;54(3):435-442 2744 UI - 14191 AU - De Oca ANM AU - Campbell JA AU - Flores-Villela O AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Museum Zool, Mexico City 04510, DF, MexicoUniv Texas, Dept Biol, Arlington, TX 76019, USAde Oca, ANM, Univ Nacl Autonoma Mexico, Fac Ciencias, Museum Zool, Mexico City 04510, DF, Mexico TI - A new species of Xenosaurus (Squamata : Xenosauridae) from the sierra madre del Sur of Oaxaca, Mexico AB - We describe a new species of Xenosaurus from the Sierra Madre del Sur in Oxaca and compare it to all the other species in the genus. The new species differs from the others by having 2-6 white spots on the infralabial-labiomental region on either side of the head. as well as the following combination of character states: second chinshields usually in medial contact with each other, few lamellae under the fourth toe (19-22, (x) over bar = 19.4), and a short tail (tail length/snout-vent length ratio 0.73-0.79). The new species was collected in the crevices of small boulders in oak forest at about 2000 m elevation and is most similar to X. rectocollaris from southeastern Puebla MH - Mexico|Distrito Federal MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000167293900003 L2 - Xenosauridae;Xenosaurus;new species;Mexico;Oaxaca;systematics SO - Herpetologica 2001 ;57(1):32-47 2745 UI - 13732 AU - de Oliveira CM AU - Plana H AU - Amram P AU - Balkowski C AU - Bolte M AD - Univ Sao Paulo, Inst Astron & Geofis, BR-04301904 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoLab Astrophys Marseille, F-13248 Marseille, FranceCNRS, Observ Paris, Dept Astrophys Extragalact & Cosmol, F-92195 Meudon, FranceUniv Paris 07, F-92195 Meudon, FranceUniv Calif Santa Cruz, Univ Calif Observ, Lick Observ, Board Studies Astron & Astrophys, Santa Cruz, CA 95064, USAde Oliveira, CM, Univ Sao Paulo, Inst Astron & Geofis, Ave Miguel Stefano 4200, BR-04301904 Sao Paulo, Brazil TI - Candidate tidal dwarf galaxies associated with Stephan's Quintet AB - We present kinematic and photometric evidence for the presence of seven candidate tidal dwarf galaxies in Stephan's Quintet. The central regions of the two most probable parent galaxies, NGC 7319 and NGC 7318B, contain little or no gas whereas the intragroup medium and, in particular, the optical tails that seem to be associated with NGC 7318B are rich in cold and ionized gas. Two tidal dwarf candidates may be located at the edge of a tidal tail, another located within a tail, and for the four others there is no obvious stellar/gaseous bridge between them and the parent galaxy. Two of the candidates are associated with H I clouds, one of which is, in addition, associated with a CO cloud. All seven regions have low continuum fluxes and high H alpha luminosity densities [F(H alpha) = (1-60) x 10(-14) ergs s(-1) cm(-2)]. Their magnitudes (M-B = -16.1 to -12.6), sizes (similar to3.5 h(75)(-1) kpc), colors (typically B-R = 0.7), and gas velocity gradients (similar to8-26 h(75) km s(-1) kpc(-1)) are typical for tidal dwarf galaxies. In addition, the ratios between their star formation rates determined from Ha and from the B-band luminosity are typical of other tidal dwarf galaxies. The masses of the tidal dwarf galaxies in Stephan's Quintet range from similar to2 x 10(8) to 10(10) M., and the median value for their inferred mass-to-light ratios is 7 (M/L).. At least two of the systems may survive possible "fallbacks" or disruption by the parent galaxies and may already be, or turn into, self-gravitating dwarf galaxies, new members of the group MH - Brazil MH - France MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000168592800016 L2 - dark matter;galaxies : dwarf;galaxies : interactions;galaxies : ISM;galaxies : kinematics and dynamics;intergalactic medium;COMPACT GROUP ENVIRONMENT; ALPHA VELOCITY-FIELDS; STAR FORMATION; ROTATION CURVES; IRREGULAR GALAXIES; GAS; PHOTOMETRY; STARBURST; CLUSTERS; NGC-5291 SO - Astronomical Journal 2001 ;121(5):2524-2539 2746 UI - 12156 AU - de Ronde JA AU - Cress WA AU - van der Mescht A AD - ARC Roodeplaat Vegetable & Ornamental Plant Inst, ZA-0001 Pretoria, South AfricaUniv Natal, Plant Growth & Dev Res Ctr, ZA-3209 Scottsville, South AfricaCtr Invest Cient Yucatan, Menda 97200, Yucatan, Mexicode Ronde, JA, ARC Roodeplaat Vegetable & Ornamental Plant Inst, Private Bag X293, ZA-0001 Pretoria, South Africa TI - Agrobacterium-mediated transformation of soybean (Glycine max) seed with the beta-glucuronidase marker gene AB - A reproducible gene transfer technique for soybean would be useful for improving cultivars. Several plant transformation methods are available, but regeneration from cell culture is required, which is a problem in soybean, as tissue culture procedures have not yet been efficiently coupled to transformation for all ifs varieties. We report here a non-tissue-culture Agrobacterium-mediated transformation of soybean seed, using p-glucuronidase as a reporter gene. The method involves subjecting partially germinated seed to vacuum infiltration in the presence of A. tumefaciens. This method is simple and rapid, and transformed plants can be obtained directly at high frequency. Transformation was confirmed using PCR and Southern hybridization analysis MH - Mexico|Yucatan MH - South Africa PB - LYNWOOD RIDGE: ACAD SCIENCE SOUTH AFRICA A S S AF RP - NOT IN FILE U3 - TC 5 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0038-2353 UR - ISI:000172816600020 L2 - STABLE TRANSFORMATION; TRANSGENIC PLANTS; ARABIDOPSIS-THALIANA; PARTICLE BOMBARDMENT; TUMEFACIENS; CULTURE; TISSUE SO - South African Journal of Science 2001 ;97(9-10):421-424 2747 UI - 13521 AU - de Sousa MA AU - Miragaia M AU - Sanches IS AU - Avila S AU - Adamson I AU - Casagrande ST AU - Brandileone MCC AU - Palacio R AU - Dell'Acqua L AU - Hortal M AU - Camou T AU - Rossi A AU - Velazquez-Meza ME AU - Echaniz-Aviles G AU - Solorzano-Santos F AU - Heitmann I AU - de Lencastre H AD - Rockefeller Univ, Microbiol Lab, New York, NY 10021, USAUniv Nova Lisboa, Inst Tecnol Quim & Biol, Mol Genet Lab, Oeiras, PortugalUniv Nova Lisboa, Fac Ciencias & Tecnol, P-2825 Monte De Caparica, PortugalKarolinska Inst, Huddinge, SwedenInst Adolfo Lutz, Sao Paulo, BrazilMinist Salud, Lab Salud Publ, Montevideo, UruguayANLIS Dr C Malbran, Inst Nacl Enfermedades Infecciosas, Serv Antimicrobianos, Buenos Aires, DF, ArgentinaInst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Cuernavaca, Morelos, MexicoIMSS, CMN, Hosp Pediat, Mexico City, DF, MexicoInst Salud Publ Chile, Santiago, ChileDe Lencastre, H, Rockefeller Univ, Microbiol Lab, 1230 York Ave, New York, NY 10021 USA TI - Three-year assessment of methicillin-resistant Staphylococcus aureus clones in Latin America from 1996 to 1998 AB - Four hundred ninety-nine methicillin-resistant Staphylococcus aureus (MRSA) isolates recovered from 1996 to 1998 from 22 hospitals in five countries of Latin America-Argentina, Brazil, Chile, Uruguay and Mexico-were examined for antimicrobial susceptibility and clonal type in order to define the endemic clones in those hospitals. The hybridization of ClaI restriction digests with the mecA- and Tn554-specific DNA probes combined with pulsed-field gel electrophoresis of chromosomal SmaI digests (ClaI-mecA::ClaI-TnS54::PFGE clonal types) documented not only the predominance and persistence of the Brazilian clone (XI::B::B) in Brazil (97%) and Argentina (86%) but also its massive dissemination to Uruguay (100%). Moreover, a close relative of the Brazilian clone (XI::kappa::B) was highly represented in Chile (53%) together with a novel clone (47%) (II::E'::F) resistant to pencillin, oxacillin, ciprofloxacin, chloramphenicol, clindamycin, erythromycin, and gentamicin. A unique clonal type (I::NH::M) was detected in Mexico among pediatric isolates and was resistant to penicillin, oxacillin, and gentamicin only. This study clearly documented the very large capacity for geographic expansion and the persistence of the Brazilian clone, contributing not only to the increasing uniformity of the MRSA in South America but worldwide as well MH - Argentina MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA MH - Portugal MH - Sweden MH - Uruguay PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 34 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000169097100026 L2 - ANTIMICROBIAL SURVEILLANCE PROGRAM; FIELD GEL-ELECTROPHORESIS; BRAZILIAN EPIDEMIC CLONE; BLOOD-STREAM INFECTIONS; GEOGRAPHIC SPREAD; STRAINS; SUSCEPTIBILITY; PATTERNS; MRSA; VANCOMYCIN SO - Journal of Clinical Microbiology 2001 ;39(6):2197-2205 2748 UI - 12660 AU - Debergh N AU - Klimov AB AD - Univ Liege, Inst Phys B5, Dept Theoret Phys, B-4000 Liege, BelgiumUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoDebergh, N, Univ Liege, Inst Phys B5, Dept Theoret Phys, B-4000 Liege, Belgium TI - Quasi-exactly solvable approach to the Jaynes-Cummings model without rotation wave approximation AB - The Jaynes-Cummings model (JCM) is studied in the frame of methods of quasi-exactly solvable problems. First, we apply these methods to the JCM under RWA and anti-RWA approximations and then, we analyze the possibility of solving the whole model MH - Belgium MH - Mexico|Jalisco PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000171540100008 L2 - 2-LEVEL SYSTEM; QUANTUM CHAOS; ALGEBRA; SPACE; FIELD; ATOM SO - International Journal of Modern Physics A 2001 ;16(24):4057-4068 2749 UI - 12400 AU - Defeo O AU - Caddy JF AD - IPN, CINVESTAV, Lab Biol Pesquera, Merida, Yucatan, MexicoUniv London Imperial Coll Sci Technol & Med, TH Huxley Sch Environm Earth Sci & Engn, London, EnglandDefeo, O, IPN, CINVESTAV, Lab Biol Pesquera, AP 73 Cordemex, Merida, Yucatan, Mexico TI - Evaluating a dynamic approach to yield-mortality models AB - Production modelling using fishery yield but total mortality rate in place of fishing effort (yield-mortality models) does not Butler from undetected changes in catchability or fishing power From technological change, is easier to apply to multi/gear fisheries for the same species, and produces biologically meaningful reference points. They can be calibrated against analytical models and may use the same data sets. Their disadvantage has been the equilibrium,assumption as per Csirke and Caddy (1983). Annual mortality rates array come from procedures such as catch curve analysis which make local equilibrium assumptions, but becomes dynamic if the mortality estimates are annual. Theory and problems in fitting this model are described using the same data sets as illustrated in the equilibrium yield-mortality (Y-Z) model in Caddy and Defeo (1996), but also for North Sea cod using data from the working group report on the ICES website. A non-linear quasi-Newton fitting procedure was used in which all three parameters, (r, B-infinity, and M) are constrained to positive values by a penalty function in the minimisation algorithm. For short time-series with high inter-annual variations in yield, the model is very sensitive to initial values. We suggest using the equilibrium model to generate seed values for dynamic fitting. Trials with the North Sea cod data shove that with a long term and robust data set the dynamic model explains a large proportion of the variance acid provides a good fit to trends in the catch series. It recovered a value for natural mortality rate similar to that used in other assessments. We also demonstrate that data sets for conventional VPA/cohort analysis can be successfully reused to deduce values of M, r, and B-infinity from Y-Z models. For all data sets, the dynamic: model is snore sensitive to time series trends than the equilibrium model although M values were generally lower, but fairly consistent with published values. Guidelines for future work are suggested. (C) 2001 International Council for the Exploration of the Sea MH - United Kingdom MH - Mexico|Yucatan PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1054-3139 UR - ISI:000172194400013 L2 - production models;yield-mortality models;FISHERIES SO - Ices Journal of Marine Science 2001 ;58(6):1253-1260 2750 UI - 13930 AU - Defeo O AU - Gomez J AU - Lercari D AD - UNDECIMAR, Fac Ciencias, Montevideo 11400, UruguayIPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoLercari, D, UNDECIMAR, Fac Ciencias, Igua 4225,POB 10773, Montevideo 11400, Uruguay TI - Testing the swash exclusion hypothesis in sandy beach populations: the mole crab Emerita brasiliensis in Uruguay AB - Exposed marine beaches are physically rigorous habitats in which macrofauna community patterns have been well correlated with physical factors such as grain size, beach slope and wave/swash processes. In this context, the swash exclusion hypothesis (SEH) gained wide acceptability in explaining the control of species abundance and diversity of the sandy beach macrofauna by swash climate, determined by wave height and beach face slope. This hypothesis predicts a consistent increase in species richness, abundance and biomass from reflective to dissipative conditions. However, predictions of the SEH have not been adequately tested at a population level. Here, demographic and life history characteristics of the intertidal mole crab Emerita brasiliensis were compared between populations of 2 microtidal exposed sandy beaches with contrasting morphodynamics during 22 consecutive months. The major prediction of the paradigm does not hold for the mole crab: total abundance, as well as that of males, females, males with spermatophores and megalops did not differ between beaches. Moreover, the reflective beach population presented higher male growth rates in size and lower natural mortality. Other population processes and life history traits gave support for the SEH: the dissipative beach population presented (1) higher abundance of ovigerous females, female growth rates, fecundity, egg production potential, size at maturity, as well as weight at size; and (2) lower female mortality and burrowing rates (for both sexes). The SEH seems to be particularly useful in explaining female somatic growth and reproductive features, which could be related to a major amount of food availability in dissipative beaches. However, other competing, but not exclusive, hypotheses are needed to explain variations in population abundance and other processes such as male growth and survivorship. The empirical evidence from several recent studies on the Uruguayan coast showed that sandy beach populations that co-occur in contrasting environments are less sensitive to variations in beach morphodynamics, which should not be considered the primary factor affecting the abundance and some life history traits. The importance of alternative population regulation processes and mechanisms are stressed MH - Mexico|Yucatan MH - Uruguay PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 38 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000168017600013 L2 - mole crab;Emerita brasiliensis;swash exclusion hypothesis;population demography;population regulation;life history;sandy beaches;beach morphodynamics;Uruguay;LIFE-HISTORY; PHENOTYPIC PLASTICITY; MACROINFAUNA; ENVIRONMENTS; COMMUNITIES; MACROFAUNA; ZONATION; PATTERNS; VARIABILITY; CALIFORNIA SO - Marine Ecology-Progress Series 2001 ;212():159-170 2751 UI - 14342 AU - Dejean A AU - Orivel J AU - Corbara B AU - Olmsted I AU - Lachaud JP AD - Univ Toulouse 3, LET, CNRS, UMR 5552, F-31062 Toulouse, FranceUniv Paris 13, LEEC, CNRS, ESA 7025, F-93430 Villetaneuse, FranceUniv Clermont Ferrand 2, LAPSCO, CNRS, ESA 6024, F-63037 Clermont Ferrand, FranceCICY, Cordemex 97310, Yucatan, MexicoUniv Toulouse 3, LEPA, CNRS, UMR 5550, F-31062 Toulouse, FranceECOSUR, Tapachula 30700, Chiapas, MexicoDejean, A, Univ Toulouse 3, LET, CNRS, UMR 5552, 118 Route Narbonne, F-31062 Toulouse, France TI - Nest site selection by two polistine wasps: The influence of Acacia-Pseudomyrmex associations against predation by army ants (Hymenoptera) AB - Nest site selection by two neotropical polistine wasps, Parachartergus apicalis and Polybia rejecta was studied in Quintana Roo, Mexico, to assess whether they nest in association with arboreal ants that protect them against army ants. Pa. apicalis nest mostly on Acacia occupied by the ant Pseudomyrmex ferruginea or Ps. peperi while Po. rejecta nest on these Acacia or on other trees occupied by large colonies of dolichoderine ants of the genera Azteca and Dolichoderus; Intraspecific nesting associations (nests on the same tree), also a possible anti-predator strategy, concerned only 13 out of 129 Pa. apicalis nests, whereas nesting associations were frequent and independent of the associated ant species in Po. rejecta and concerned 58 wasp nests out of 92 (significant difference with Pa. apicalis). Interspecific associations between wasps occurred only twice. The trees supporting wasp nests were grouped. We then tested the reaction of columns of Eciton burchelli, the most frequent army ant species noted, when confronted with Ps. ferruginea located on branches of Acacia. Army ants avoided Ps. ferruginea, permitting us to verify that the association with Pseudomyrmex could provide the wasp nests protection against army ants (as known for associations with arboreal Dolichoderinae) MH - France MH - Mexico|Chiapas MH - Mexico|Yucatan PB - CHICO: CALIF STATE UNIV RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0361-6525 UR - ISI:000166827600010 L2 - Vespidae;nest site selection;protection against army ants;Acacia-Pseudomyrmex associations;SOCIAL WASP; FOREST SO - Sociobiology 2001 ;37(1):135-146 2752 UI - 14657 AU - del-Muro-Cuellar B AU - Malabre M AD - Inst Rech Commun & Cybernet Nantes, UMR CNRS 6597, F-44321 Nantes 03, FranceCEM, Inst Tecnol & Estudios Super Monterrey, Atizapan Estado De Mex 52926, MexicoMalabre, M, Inst Rech Commun & Cybernet Nantes, UMR CNRS 6597, BP 92101, F-44321 Nantes 03, France TI - Fixed poles of disturbance rejection by dynamic measurement feedback: a geometric approach AB - This paper deals with the problem of disturbance rejection by dynamic measurement feedback, it aims at proposing new geometric characterizations for the fixed poles of this problem. We also propose solutions to the problem for which all the poles, except the fixed poles of the problem, are freely placed. These fixed poles are also characterized as some particular invariant zeros. As a corollary, we propose a necessary and sufficient condition for the existence of internally stable solutions, which generalizes the sufficient condition proposed by Basile and Marro, (C) 2000 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000165909700008 L2 - linear systems;disturbance rejection;disturbance localization;geometric approach;pole assignment;fixed poles;LOCALIZATION SO - Automatica 2001 ;37(2):231-238 2753 UI - 12440 AU - Del Angel G AU - Bonilla A AU - Navarrete J AU - Figueroa EG AU - Fierro JLG AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoCSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, SpainDel Angel, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - The inhibiting effect of lanthanum on the formation of benzene over PtSn/Al2O3 reforming catalysts AB - The effect of La2O3 on the catalytic properties of PtSn/Al2O3 reforming catalysts has been investigated. On catalysts with low La2O3 content (1 wt%) FTIR CO adsorption spectra show two absorption bands at 2070 and 2122 cm(-1). At higher La2O3 content (20 wt%) the band at 2070 cm(-1) diminishes progressively until it completely disappears, while the band at 2122 cm(-1) increases and shifts to 2130 cm(-1). This band is assigned to CO adsorbed on oxidized Pt. This effect is observed on samples on which PtSn-La2O3 multiphase coexists. The presence of Pt in an oxidized state is supported by XPS since Pt2+ is present on the catalysts containing Pt/Sn and La2O3. On the other hand, XPS revealed the presence of Sn2+ and Sn degrees. For the n-heptane reaction the selectivity pattern of the PtSn/Al2O3-La catalysts shows total inhibition of the formation of benzene, high olefin content, and low n-C-7 dehydrocyclization products. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000171973400001 L2 - PtSn catalysts;reforming catalysts;lanthanum effect;n-heptane dehydrocyclization;ALLOY FORMATION; ALUMINA; PLATINUM; SPECTROSCOPY; PALLADIUM; MOSSBAUER; RHODIUM SO - Journal of Catalysis 2001 ;203(2):257-263 2754 UI - 13646 AU - del Arenal IP AU - Flores AG AU - Poole RK AU - Escamilla JE AD - Univ Sheffield, Krebs Inst Biomol Res, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, EnglandUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoPoole, RK, Univ Sheffield, Krebs Inst Biomol Res, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England TI - Taenia crassiceps metacestodes have cytochrome oxidase aa(3) but not cytochrome o functioning as terminal oxidase AB - In mitochondria obtained from Taenia crassiceps metacestodes; carbon monoxide difference spectra reveal signals characteristic of the classical mitochondrial oxidase, cytochrome era,, as well as signals suggesting the presence of 'cytochrome o'. In the present work, using photodissociation spectrophotometry and analysis of the haem groups, we conclude that then is no harm O in these larvae, and that the only cytochrome that functions as terminal oxidase is cytochrome c oxidase, aa(3). At temperatures between - 70 and - 100 degreesC, the energy of activation for CO reassociation with cytochrome a(3) was 10.5 kcal mol(-1), and for oxygen binding 7.8 kcal mol(-1). (C) 2001 Elsevier Science B.Y. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Parasitology U5 - J;Article AV - English IS - 0166-6851 UR - ISI:000168791500011 L2 - Taenia crassiceps;mitochondria;cytochrome oxidase;cytochrome o;haem;ELECTRON-TRANSFER COMPLEXES; SUUM MUSCLE MITOCHONDRIA; ASCARIS-SUUM; RESPIRATORY-CHAIN; ESCHERICHIA-COLI; TRANSPORT; HELMINTHS; KINETICS; MEMBRANE; PROTEINS SO - Molecular and Biochemical Parasitology 2001 ;114(1):103-109 2755 UI - 12976 AU - del Blanco IA AU - Rajaram S AU - Kronstad WE AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USACIMMYT, Mexico City 06600, DF, Mexicodel Blanco, IA, N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105 USA TI - Agronomic potential of synthetic hexaploid wheat-derived populations AB - Wild relatives of wheat (Triticum aestivum L.) have primarily been used as sources of genes for biotic and abiotic stress resistance. A more direct approach to grain yield improvement has been sought by using exotic germplasm to enhance quantitative traits, including grain yield. This study was conducted to determine whether synthetic hexaploids, developed from artificial hybridization of durum wheat [Triticum turgidum ssp. durum (Desf.) Husn.] with Aegilops tauschii Coss., can enhance yield or yield components of wheat. Two hundred eighty-two BC2F2-derived lines, involving six crosses between different synthetic hexaploids and four spring wheat cultivars, were evaluated for grain yield and its components. These synthetic-derived lines were compared with their recurrent parent in field experiments conducted during the 1995 to 1996 and 1996 to 1997 crop seasons near Ciudad Obregon, Sonora, Mexico. More than 80% of the synthetic-derived lines were significantly superior to their recurrent parent for kernel weight. Eight lines had significantly higher grain yield compared with their recurrent parent. Grain yields of superior lines were up to 11% higher than those of their recurrent parents. A strong association between grains m(-2), biomass, spikes m(-2), and grain and biomass production rates and grain yield was observed in all populations. Path coefficient analyses of yield components revealed a strong direct effect of spikes m(-2) and grains spike(-1) on grain yield. Results indicate that synthetic hexaploids can be a valuable source of alleles to improve kernel weight MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170696200008 L2 - TAUSCHII BACKCROSS POPULATIONS; X T-TAUSCHII; TRITICUM-TAUSCHII; WINTER-WHEAT; BREAD WHEAT; GENETIC-IMPROVEMENT; NORTHWEST MEXICO; GRAIN-YIELD; KARNAL BUNT; TURGIDUM SO - Crop Science 2001 ;41(3):670-676 2756 UI - 13210 AU - Del Brutto OH AU - Rajshekhar V AU - White AC AU - Tsang VCW AU - Nash TE AU - Takayanagui OM AU - Schantz PM AU - Evans CAW AU - Flisser A AU - Correa D AU - Botero D AU - Allan JC AU - Sarti E AU - Gonzalez AE AU - Gilman RH AU - Garcia HH AD - Hosp Clin Kennedy, Dept Neurol Sci, Guayaquil, EcuadorChristian Med Coll & Hosp, Dept Neurol Sci, Vellore 632004, Tamil Nadu, IndiaBaylor Coll Med, Dept Med, Infect Dis Sect, Houston, TX 77030, USACtr Dis Control, Div Parasit Dis, Natl Ctr Infect Dis, Atlanta, GA 30333, USANIAID, Parasit Dis Lab, NIH, Bethesda, MD 20892, USAUniv Sao Paulo, Fac Med Ribeirao Preto, Dept Neurol, BR-05508 Sao Paulo, BrazilUniv Cambridge, Sch Clin, Cambridge, EnglandSecretaria Salud, Inst Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoSecretaria Salud, Direcc Gen Epidemiol, Mexico City, DF, MexicoInst Colombiano Med Trop, Medellin, ColombiaPfizer Global Res & Dev, Sandwich, Kent, EnglandUniv Nacl Mayor San Marcos, Lima 14, PeruAsociac Benefica Proyectos Informat Salud Med & A, Lima, PeruJohns Hopkins Univ, Sch Hyg & Publ Hlth, Dept Int Hlth, Baltimore, MD, USAInst Nacl Ciencias Neurol, Cysticercosis Unit, Lima, PeruUniv Peruana Cayetano Heredia, Dept Microbiol, Lima, PeruUniv Peruana Cayetano Heredia, Dept Pathol, Lima, PeruDel Brutto, OH, Air Ctr 3542, POB 522970, Miami, FL 33152, USA TI - Proposed diagnostic criteria for neurocysticercosis AB - Neurocysticercosis is the most common helminthic infection of the CNS but its diagnosis remains difficult. Clinical manifestations are nonspecific, most neuroimaging findings are not pathognomonic, and some serologic tests have low sensitivity and specificity. The authors provide diagnostic criteria for neurocysticercosis based on objective clinical, imaging, immunologic, and epidemiologic data. These include four categories of criteria stratified on the basis of their diagnostic strength, including the following: 1) absolute-histologic demonstration of the parasite from biopsy of a brain or spinal cord lesion, cystic lesions showing the scolex on CT or MRI, and direct visualization of subretinal parasites by funduscopic examination; 2) major-lesions highly suggestive of neurocysticercosis on neuroimaging studies, positive serum enzyme-linked immunoelectrotransfer blot for the detection of anticysticercal antibodies, resolution of intracranial cystic lesions after therapy with albendazole or praziquantel, and spontaneous resolution of small single enhancing lesions; 3) minor-lesions compatible with neurocysticercosis on neuroimaging studies, clinical manifestations suggestive of neurocysticercosis, positive CSF enzyme-linked immunosorbent assay for detection of anticysticercal antibodies or cysticercal antigens, and cysticercosis outside the CNS; and 4) epidemiologic-evidence of a household contact with Taenia solium infection, individuals coming from or living in an area where cysticercosis is endemic, and history of frequent travel to disease-endemic areas. Interpretation of these criteria permits two degrees of diagnostic certainty: 1) definitive diagnosis, in patients who have one absolute criterion or in those who have two major plus one minor and one epidemiologic criterion; and 2) probable diagnosis, in patients who have one major plus two minor criteria, in those who have one major plus one minor and one epidemiologic criterion, and in those who have three minor plus one epidemiologic criterion MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - India MH - Mexico|Distrito Federal MH - Peru MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 129 U4 - Clinical Neurology U5 - J;Review AV - English IS - 0028-3878 UR - ISI:000169994300005 L2 - TAENIA-SOLIUM CYSTICERCOSIS; DOUBLE-BLIND TRIAL; CEREBRAL CYSTICERCOSIS; ALBENDAZOLE THERAPY; CEREBROSPINAL-FLUID; MAJOR CAUSE; IMMUNODIAGNOSIS; SEIZURES; EPILEPSY; ELISA SO - Neurology 2001 ;57(2):177-183 2757 UI - 14538 AU - del Campo JG AU - Galindo-Uribarri A AU - Beene JR AU - Gross CJ AU - Liang JF AU - Halbert ML AU - Stracener DW AU - Shapira D AU - Varner RL AU - Chavez-Lomeli E AU - Ortiz ME AD - Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAOak Ridge Inst Sci & Educ, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexicodel Campo, JG, Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USA TI - Decay of a resonance in Ne-18 by the simultaneous emission of two protons AB - Radioactive ion beams of F-17 were used to study several resonance states in Ne-18. Clear evidence for simultaneous two-proton emission from the 6.15 MeV state (J(pi) = l(-)) in Ne-18 has been observed with the reaction F-17 + H-1. Because of limited angular coverage, the data did not differentiate between the two possible mechanisms of simultaneous decay, diproton (He-2) emission or direct three-body decay. The two-proton partial width was found to be 21 +/- 3 eV assuming He-2 emission and 57 +/- 6 eV assuming three-body decay. The total width of the l(-) state was measured to be 50 +/- 5 keV. Several additional resonances that decay by single proton emission were also studied MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 46 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000166192800011 L2 - 2-PROTON EMISSION; SCATTERING; STATE SO - Physical Review Letters 2001 ;86(1):43-46 2758 UI - 13198 AU - Del Prado M AU - Villalpando S AU - Elizondo A AU - Rodriguez M AU - Demmelmair H AU - Koletzko B AD - Univ Munich, Dr Von Haunersches Kinderspital, Div Metab Disorders & Nutr, Kinderpol, D-80336 Munich, GermanyUniv Munich, Dr Von Haunersches Kinderspital, Kinderklin, Munich, GermanyInst Mexicano Seguro Social, Unidad Invest Med Nutr, Mexico City, DF, MexicoKoletzko, B, Univ Munich, Dr Von Haunersches Kinderspital, Div Metab Disorders & Nutr, Kinderpol, Lindwurmstr 4, D-80336 Munich, Germany TI - Contribution of dietary and newly formed arachidonic acid to human milk lipids in women eating a low-fat diet AB - Background: Polyunsaturated fatty acids in milk are derived from direct intestinal absorption, endogenous synthesis, or maternal body stores. Arachidonic acid (AA) intake is frequently low in undernourished women, but milk secretion of this fatty acid is similar to that in well-nourished women. Objective: The objective was to evaluate the contribution of dietary and endogenously synthesized AA to its total secretion in the milk of women eating a low-fat diet. Design: Ten lactating women who habitually ate a low-fat diet (17% of energy) received 2.5 mg [C-13]linoleic acid (LA)/kg body wt orally 5 mo postpartum. LA and AA concentrations and C-13 enrichment were measured in milk samples collected before and after the tracer application. Total lipid, LA, and AA contents were determined in diet composites, Fatty acids were assessed by gas chromatography and C-13 enrichment by isotope ratio mass spectrometry. Results: The cumulative 72-h recovery of [C-13]LA in milk was 16.3 +/- 6.4% of the dose; only 0.01% of the label was found as [C-13]AA. The calculated transfer of dietary LA and AA into milk was 32.8 +/- 18.0% and 11.8 +/- 6.6%. respectively. AA originating from conversion of dietary LA contributed only 1.1% to the total milk AA secreted. Conclusions: Little milk AA originates from conversion of LA; 70% of LA and 90% of AA secreted in milk were not derived from direct intestinal absorption. Our results suggest that maternal body stores are the major source of milk LA and AA in these women MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 16 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000170129100016 L2 - human milk;linoleic acid;arachidonic acid;polyunsaturated fatty acids;lactation;isotope ratio mass spectrometry;Mexico;women;MATURE HUMAN-MILK; LACTATING WOMEN; INVIVO; RAT SO - American Journal of Clinical Nutrition 2001 ;74(2):242-247 2759 UI - 12382 AU - del Rayo M AU - Barmenkov YO AU - Kir'yanov AV AU - Sifuentes C AU - Kozhevnikov NM AD - Ctr Invest Opt, Leon, MexicoState Tech Univ, St Petersburg, Russiadel Rayo, M, Ctr Invest Opt, Leon, Mexico TI - Study of the optical nonlinearity of polymeric films containing organic materials AB - This paper analyzes two widely used experimental methods of diagnosing the nonlinear photoresponse of polymeric films containing organic materials: a method based on scanning the sample close to the focal plane of a lens, and a method of phase-modulated beams, based on the self-diffraction of coherent beams in the bulk of the test medium. These methods are used to measure the photoinduced refractive-index change of thick (about 40 mum) polymeric films and thin (about 0.5 mum) Langmuir-Blodgett films containing bacteriorhodopsin. It is shown that the photoresponse-saturation effect of the medium needs to be taken into account in order to interpret the experimental results obtained by the two methods. (C) 2001 The Optical Society of America MH - Mexico|Guanajuato MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 1070-9762 UR - ISI:000172229500005 L2 - CHEMICALLY ENHANCED BACTERIORHODOPSIN; HOLOGRAPHY; GRATINGS SO - Journal of Optical Technology 2001 ;68(11):814-819 2760 UI - 13822 AU - del Rayo M AU - Barmenkov YO AU - Kir'yanov AV AU - Starodumov AN AU - Vanhanen J AU - Jaaskelainen T AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Joensuu, Dept Phys, FIN-80101 Joensuu, Finlanddel Rayo, M, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - Application of the Z-scan technique to a saturable medium with excited state absorption AB - The Z-scan technique is adapted for measuring the nonlinear part of refractive index in a medium with the excited state saturable absorption. This technique is applied to study photorefractive properties of poly mer films containing bacteriorhodopsin at wavelengths 543 and 633 nm. Analysis of the Z-scans obtained allows to suggest a model of a BR molecule, which accounts for both the ground and excited state saturable absorption MH - Finland MH - Mexico|Guanajuato PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000168357300010 L2 - BACTERIORHODOPSIN-FILMS; MEMBRANE SO - Laser Physics 2001 ;11(4):502-506 2761 UI - 12104 AU - Del Razo LM AU - Quintanilla-Vega B AU - Brambila-Colombres E AU - Calderon-Aranda ES AU - Manno M AU - Albores A AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Secc Toxicol, Mexico City 07360, DF, MexicoUniv Autonoma Puebla, Fac Ciencias Quim, Puebla 72570, MexicoUniv Padua, Inst Med Lavoro, Padua, ItalyAlbores, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Secc Toxicol, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Stress proteins induced by arsenic AB - The elevated expression of stress proteins is considered to be a universal response to adverse conditions, representing a potential mechanism of cellular, defense against disease and a potential target for novel therapeutics. Exposure to arsenicals either in vitro or in vivo in a variety of model, systems has been shown to cause the induction of a number of the major stress protein families such as heat shock proteins (Hsp). Among them are members with low molecular weight, such as metallotionein and ubiquitin, as well as ones with masses of 21, 32, 60, 70, 90, and 110 kDa. In most of the cases, the induction of stress. proteins depends on the capacity of the arsenical to reach the target, its valence, and the type of exposure, arsenite being the biggest inducer of most Hsp in several organs and systems. Hsp induction is a rapid dose-dependent response (1-8 h) to the acute exposure to arsenite. Thus, the stress response appears to be useful to monitor the sublethal toxicity resulting from a single exposure to arsenite. The present paper offers a critical review of the capacity of arsenicals to modulate the expression and/or accumulation of stress proteins. The physiological consequences of the arsenic-induced stress and its usefulness in monitoring effects resulting from arsenic exposure in humans and other organisms are discussed. (C) 2001 Elsevier Science MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 75 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Review AV - English IS - 0041-008X UR - ISI:000172950500006 L2 - arsenic;stress proteins;heat shock proteins;heme oxygenase;metallothionein;HEAT-SHOCK PROTEIN; NF-KAPPA-B; HAMSTER OVARY CELLS; METALLOTHIONEIN GENE-EXPRESSION; TRANSCRIPTION FACTOR MTF-1; HEME OXYGENASE-1 GENE; EMBRYO LIVER-CELLS; I/II NULL MICE; SODIUM ARSENITE; DIMETHYLARSINIC ACID SO - Toxicology and Applied Pharmacology 2001 ;177(2):132-148 2762 UI - 12986 AU - Del Razo LM AU - Stybo M AU - Cullen WR AU - Thomas DJ AD - US EPA, NHEERL, ORD, Pharmacokinet Branch,Expt Toxicol Div, Res Triangle Pk, NC 27711, USAUniv N Carolina, Sch Med, Ctr Environm Med & Lung Biol, Chapel Hill, NC 27599, USANatl Polytech Inst, Ctr Res & Adv Studies, Sect Toxicol, Mexico City, DF, MexicoUniv N Carolina, Sch Publ Hlth, Dept Nutr, Chapel Hill, NC 27599, USAUniv N Carolina, Sch Med, Dept Pediat, Chapel Hill, NC 27599, USAUniv British Columbia, Dept Chem, Vancouver, BC, CanadaThomas, DJ, US EPA, NHEERL, ORD, Pharmacokinet Branch,Expt Toxicol Div, MD 74, Res Triangle Pk, NC 27711 USA TI - Determination of trivalent methylated arsenicals in biological matrices AB - The enzymatically catalyzed oxidative methylation of As yields methylated arsenicals that contain pentavalent As (As-V). Because trivalent As (As-III) is the favored substrate for this methyltransferase, methylated arsenicals containing As-V are reduced to trivalency in cells. Methylated arsenicals that contain As-III are extremely potent inhibitors of NADPH-dependent flavoprotein oxidoreductases and potent cytotoxins in many cell types. Therefore, the formation of methylated arsenicals that contain As-III may be properly regarded as an activation step, rather than a means of detoxification. Recognition of the role of methylated arsenicals that contain As-III in the toxicity and metabolism of As emphasizes the need for analytical methods to detect and quantify these species in biological samples. Hence, a method was developed to exploit pH-dependent differences in the generation of arsines from inorganic and methylated arsenicals that contain either As-V or As-III. Reduction with borohydride at pH 6 generated arsines from inorganic As-III, methyl As-III, and dimethyl As-III, but not from inorganic As-V, methyl As-V, and dimethyl As-V. Reduction with borohydride at pH 2 or lower generated arsines from arsenicals that contained either As-V or As-III. Arsines are trapped in a liquid nitrogen-cooled gas chromatographic trap, which is subsequently warmed to allow separation of the hydrides by their boiling points. Atomic absorption spectrophotometry is used to detect and quantify the arsines. The detection limits (ng As ml(-1)) for inorganic As-III, methyl As-III, and dimethyl As-III are 1.1, 1.2, and 6.5, respectively. This method has been applied to the analysis of arsenicals in water, human urine, and cultured cells. Both methyl As-III. and dimethyl As-III are detected in urine samples from individuals who chronically consumed inorganic As-contaminated water and in human cells exposed in vitro to inorganic As-III. The reliable quantitation of inorganic and methylated arsenicals that contain As-III. in biological samples will aid the study of the toxicity of these species and may provide a new biomarker of the effects of chronic exposure to As. (C) 2001 Academic Press MH - Canada MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 97 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-008X UR - ISI:000170532300010 L2 - arsenic;methylated arsenic;trivalent arsenic;pentavalent arsenic;hydride generation;atomic absorption spectrophotometry;analysis;stability;biological matrices;metabolism;toxicity;MONOMETHYLARSONOUS ACID MMA(III); DOSE-RESPONSE RELATIONSHIP; DIMETHYLARSINIC ACID; DRINKING-WATER; HUMAN URINE; ENZYMATIC METHYLATION; MASS-SPECTROMETRY; MAMMALIAN SYSTEMS; DIABETES-MELLITUS; CANCER MORTALITY SO - Toxicology and Applied Pharmacology 2001 ;174(3):282-293 2763 UI - 11792 AU - Del Rio-Portilla MA AU - Gonzalez-Aviles JG AD - SCPP Pescadores Nacl Abulon, SC de RL, Ensenada 22800, Baja California, MexicoCtr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Ensenada 22800, Baja California, MexicoDel Rio-Portilla, MA, POB 434844, San Diego, CA 92143, USA TI - Population genetics of the yellow abalone, Haliotis corrugata, in Cedros and San Benito Islands: A preliminary survey AB - The yellow abalone, Haliotis corrugata, is one of the principal species caught in Central Baja California, Mexico. Around the Cedros and San Benito Islands, the yellow abalone is mainly distributed in three zones: the North (Punta Norte) and South (San Agustin) of Cedros Island and around the small islands of San Benito. The main goal of this work was to characterize genetically the populations of the yellow abalone in these three zones as a baseline to help the Fishery. Allozyme electrophoresis at eight loci was carried out with six samples from two years in the three localities. The average number of alleles per locus was 2.3 with a 67% polymorphism. Mean unbiased heterozygosity ranged from 0.15 to 0.25, which is similar to that of other abalone species. Only three out of 34 cases did not a.-roe with the Hardy-Weinberg equilibrium and there was no tendency for either heterozygote excess or deficit. It was concluded that H. corrugata shows differentiation between localities and these may be considered as independent populations for fishery management MH - Mexico|Baja California MH - USA PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 4 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000173758900027 L2 - abalone;Haliotis corrugata;population genetics;allozymes;Cedros Island;San Benito Islands;RED ABALONE; CALIFORNIA; HETEROZYGOSITY; RUFESCENS SO - Journal of Shellfish Research 2001 ;20(2):765-770 2764 UI - 11965 AU - del Rio CM AU - Schondube JE AU - McWhorter TJ AU - Herrera LG AD - Univ Wyoming, Dept Zool, Laramie, WY 82071, USAUniv Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAUNAM, Inst Biol, Dept Zool, Coyoacan 04510, DF, MexicoDel Rio, CM, Univ Wyoming, Dept Zool, Laramie, WY 82071, USA TI - Intake responses in nectar feeding birds: Digestive and metabolic causes, osmoregulatory consequences, and coevolutionary effects AB - Nectar-feeding vertebrates respond to variation in nectar sugar content by modulating volumetric intake. In some nectar feeding animals, the intake response to sugar concentration can be accurately predicted from simple mathematical models that rely on knowledge of gut morphology, in vitro rates of sugar digestion, and daily energy expenditures. Because most of the floral nectars consumed by vertebrates are dilute, these animals ingest large amounts of water while feeding. The water turnover rates of hummingbirds feeding on dilute nectar are more similar to those of amphibious and aquatic organisms than to those of terrestrial vertebrates. Dilute nectars can pose osmoregulatory challenges for nectarivores. Nectarivorous birds exhibit renal traits that are well suited to dispose of large water loads and that appear inadequate to produce concentrated urine. Nectar-feeding birds prefer concentrated over dilute sugar solutions. However, the concentration difference that they can discriminate is smaller at low than at high concentration. We hypothesize that this pattern is a consequence of the functional form of intake responses that often results in decelerating sugar intakes with increasing sugar concentration. The diminishing returns in floral attractivity that may result from increased nectar concentration may be one of the reasons why the nectars of hummingbird pollinated flowers are dilute in spite of the preference of birds for higher concentrations. The intake responses of nectar-feeding birds capture the integration of a behavioral response with the physiological processes that shape it. Because the behavior of nectar-feeding birds can have consequences for the plants that they visit, the intake response may also have coevolutionary effects MH - Mexico|Distrito Federal MH - USA PB - MCLEAN: SOC INTEGRATIVE COMPARATIVE BIOLOGY RP - NOT IN FILE U3 - TC 33 U4 - Zoology U5 - J;Article AV - English IS - 0003-1569 UR - ISI:000173403000019 L2 - HUMMINGBIRD CALYPTE-ANNA; DOUBLE-COLLARED SUNBIRDS; FLORAL NECTAR; CONCENTRATION PREFERENCES; AMBIENT-TEMPERATURE; WATER; ENERGETICS; SELECTION; KIDNEY; OPTIMIZATION SO - American Zoologist 2001 ;41(4):902-915 2765 UI - 12172 AU - del Rio G AU - Bartley TF AU - del-Rio H AU - Rao R AU - Jin K AU - Greenberg DA AU - Eshoo M AU - Bredesen DE AD - Buck Inst Age Res, Novato, CA 94945, USAUniv Calif Santa Barbara, Santa Barbara, CA, USACIMAT, Ctr Invest & Matemat, Guanajuato, MexicoBredesen, DE, Buck Inst Age Res, 8001 Redwood Blvd, Novato, CA 94945 USA TI - Mining DNA microarray data using a novel approach based on graph theory AB - The recent demonstration that biochemical pathways from diverse organisms are arranged in scale-free, rather than random, systems [Jeong et at., Nature 407 (2000) 651-654], emphasizes the importance of developing methods for the identification of biochemical nexuses - the nodes within biochemical pathways that serve as the major input/output hubs, and therefore represent potentially important targets for modulation. Here we describe a bioinformatics approach that identifies candidate nexuses for biochemical pathways without requiring functional gene annotation; we also provide proof-of-principle experiments to support this technique. This approach, called Nexxus. may lead to the identification of new signal transduction pathways and targets for drug design. (C) 2001 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000172757500017 L2 - functional genomics;DNA microarray;graph theory;yeast cell cycle;yeast metabolism;cerebral ischemia;PROTEIN-PROTEIN INTERACTIONS; SACCHAROMYCES-CEREVISIAE; CELL-CYCLE; GENE; EXPRESSION; KINASES SO - Febs Letters 2001 ;509(2):230-234 2766 UI - 13385 AU - del Rio JA AU - Whitaker S AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616, USAdel Rio, JA, Univ Nacl Autonoma Mexico, Ctr Invest Energia, AP 34, Temixco 62580, Morelos, Mexico TI - Electrohydrodynamics in porous media AB - In this work we develop the volume averaged form of the frequency-dependent governing equations for electrohydrodynamics in a saturated porous medium. The concept of local electrical equilibrium is identified, and when this condition is valid we obtain a one-equation model describing the coupled transport of momentum and electric charge. When local electrical equilibrium is not valid, separate forms of Maxwell's equations must be developed for both the fluid and solid phases MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0169-3913 UR - ISI:000169523100010 L2 - volume averaging;Ohm's law;Darcy's law;LOCAL THERMAL-EQUILIBRIUM; THEORETICAL APPROACH; AVERAGED EQUATIONS; TRANSPORT; FLOW; CONDUCTIVITY; DERIVATION; MODEL; LAW SO - Transport in Porous Media 2001 ;44(2):385-405 2767 UI - 14318 AU - del Rio JM AU - Jones MN AD - Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoUniv Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, Englanddel Rio, JM, Inst Mexicano Petr, Programa Simulac Mol, Eje Cent Lazaro,Cardenas 152,Delegac Gustavo A, Mexico City 07730, DF, Mexico TI - Thermodynamics of the hydrophobic effect AB - A thermodynamic theory is developed describing the transfer process of nonpolar substances from water to their pure state and the micellization process. The basis of the theory is the consideration, experimentally supported, that to a first-order approximation the change in the standard molar entropy (DeltaS(o)) can be consider proportional to the standard molar heat capacity (DeltaC(p)(o)) with proportionality constant, r, independent of the temperature and the pressure. In general it is found that the value of the magnitude of r decreases with the size of the solute molecule until a limiting value. This level of approximation is sufficient to predict observations such as Linear plots between T DeltaS degrees and DeltaH degrees, reduced behavior for surfactants with the temperature, and an important part of accepted phenomenology in the literature about the hydrophobic effect MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000166950000013 L2 - CRITICAL MICELLE CONCENTRATIONS; LIQUID WATER; TEMPERATURE-DEPENDENCE; AQUEOUS-SOLUTIONS; HEAT-CAPACITIES; ENTROPY; MICELLIZATION; ENTHALPIES; SURFACTANT; SOLUBILITY SO - Journal of Physical Chemistry B 2001 ;105(6):1200-1211 2768 UI - 12780 AU - Delgadillo JA AU - Carrillo E AU - Moran J AU - Duarte G AU - Chemineau P AU - Malpaux B AD - Univ Autonoma Agraria Antonio Narro, Dept Ciencias Med Vet, Dept Anim Prod, Torreon, Coahuila, MexicoINRA, PRC, CNRS, F-37380 Nouzilly, FranceDelgadillo, JA, Univ Autonoma Agraria Antonio Narro, Dept Ciencias Med Vet, Dept Anim Prod, Carretera Santa Fe & Perifer,Apartado Postal 940, Torreon, Coahuila, Mexico TI - Induction of sexual activity of male creole goats in subtropical northern Mexico using long days and melatonin AB - The aim of this study was to determine whether the sexual activity of local male Creole goats in subtropical Mexico can be induced during the nonbreeding season by a long-day treatment followed by insertion of two melatonin implants. The experiment was carried out in the Laguna region in the State of Coahuila, Mexico (26 degreesN). Fourteen male goats were allocated to two balanced groups (n = 7 each) according to body and testicular weights. Males were kept together in two separate groups and fed lucerne hay for ad libitum intake and 300 g of commercial concentrate and had free access to water and mineral blocks. The control group remained in open sheds under natural photoperiod and ambient temperature conditions. The experimental group was placed in a light-proof building and exposed to 2.5 mo of long days (16 h of light/d) from November 1 to January 15. On January 16, each male received two s.c. melatonin implants and was exposed to natural photoperiodic changes in an open shed. In the control group, testicular weight exhibited seasonal variations; the highest value occurred on May 30 (146 +/- 10 g). Treated males reached maximum testicular weight earlier (March 15; 147 +/- 11 g), and sperm quality from January to March was higher than that observed in the control group (P < 0.05). Treatment caused an increase in LH pulse frequency (2.0 +/- 0.5 vs 0.3 +/- 0.2 pulse/8 h in February, 4.6 +/- 1.1 vs 0.1 +/- 0.1 pulse/8 h in March; experimental vs control group, respectively). In the control group, plasma testosterone remained low until mid-June and increased thereafter to remain elevated until the end of the study. In the experimental group, elevated plasma testosterone was observed from February to April and from July to November. Treating male goats in subtropical latitudes with artificial long days and melatonin can induce an intense sexual activity during the natural nonbreeding season MH - France MH - Mexico|Coahuila PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 10 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000171208900001 L2 - goats;melatonin;photoperiod;sexual behavior;subtropics;SHORT PHOTOPERIODIC CYCLES; AUSTRALIAN CASHMERE GOATS; SEASONAL-VARIATION; PROLACTIN SECRETION; LH-SECRETION; TESTOSTERONE; RAMS; BUCKS; REPRODUCTION; PATTERNS SO - Journal of Animal Science 2001 ;79(9):2245-2252 2769 UI - 13497 AU - Delgado J AU - Yustas EC AU - Sanchez-Soto LL AU - Klimov AB AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoDelgado, J, Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, Spain TI - Comprehensive theory of the relative phase in atom-field interactions AB - We explore the role played by the quantum relative phase in a well-known model of atom-field interaction, namely, the Dicke model. We introduce an appropriate polar decomposition of the atom-field relative amplitudes that leads to a truly Hermitian relative-phase operator, whose eigenstates correctly describe the phase properties, as we demonstrate by studying the positive operator-valued measure derived from it. We find the probability distribution for this relative phase and, by resorting to a numerical procedure, we study its time evolution MH - Mexico|Jalisco MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000169134800086 L2 - JAYNES-CUMMINGS MODEL; SCHRODINGER-CAT STATES; QUANTUM OPTICS; SPONTANEOUS EMISSION; CONJUGATE VARIABLES; DIFFERENCE OPERATOR; STOKES PARAMETERS; 2-LEVEL ATOMS; SYSTEM; DYNAMICS SO - Physical Review A 2001 ;6306(6): 2770 UI - 11859 AU - Dellaripa PF AU - Bermudez A AU - Weiss S AU - Thong B AU - Cid MC AU - Pineda C AU - Iglesias A AU - Fessler B AU - Klashman D AU - Robinson H AU - Luqmani R AD - Lahey Clin Fdn, Burlington, MA, USATan Tock Seng Hosp, Singapore, SingaporeHosp Clin Barcelona, Barcelona, SpainInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoUniv Nacl, Bogota, ColombiaUniv Alabama, Birmingham, AL, USAUniv Calif Los Angeles, Los Angeles, CA 90024, USAWestern Gen Hosp, Edinburgh EH4 2XU, Midlothian, ScotlandCleveland Clin Fdn, Int Network Study Systemic Vasculitidies Inssys, Cleveland, OH 44195, USA TI - Intensive care unit (ICU) outcomes in patients with rheumatic diseases: A retrospective multicenter, international observational study MH - Colombia MH - Mexico|Distrito Federal MH - United Kingdom MH - Singapore MH - Spain MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Critical Care Medicine U5 - J;Meeting Abstract AV - English IS - 0090-3493 UR - ISI:000172920900044 SO - Critical Care Medicine 2001 ;29(12):A14-A14 2771 UI - 12078 AU - Demangeat C AU - Meza-Aguilar S AU - Taguchi M AU - M'Passi-Mabiala B AU - Parlebas JC AD - Inst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, FranceUniv Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Culiacan 80010, MexicoAbdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyDept Phys, Lab Mat & Energies, Brazzaville, CongoDemangeat, C, Inst Phys & Chim Mat Strasbourg, 23 Rue du Loess, F-67037 Strasbourg, France TI - First principles theory of magnetically stabilized surface alloys AB - We investigate the interrelation of the magnetism and stability of various surface alloys. Experimentally, the growth of a transition metal on a metallic substrate is usually not regular, and recent ab initio calculations on the energetics predicted that most of the 3d atoms have a strong tendency to exchange places with the underlying atoms of the substrate. In this communication, we report on a few examples taken from the literature and also on our results concerning the stability of the Mn-Fe and Mn-Co interfaces. These two systems display very different behaviors: for Mn on Fe(001), alloying is present only in the nonmagnetic case, whereas spin-polarized calculations tend to stabilize a perfect Mn monolayer on Fe(001). For Mn on Co(001), in contrast, both spin-polarized and non-spin-polarized calculations lead to an exchange between the Mn adatoms and the Co surface atoms. These theoretical results determined within the tight-binding linear muffin-tin-orbital method can explain the magnetic properties obtained through the magneto-optic Kerr effect and X-ray magnetic circular dichroism MH - Congo MH - France MH - Italy MH - Mexico|Sinaloa PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0031-918X UR - ISI:000172969500002 L2 - ULTRATHIN MN FILMS; V-FILMS; METAL MONOLAYERS; VANADIUM FILMS; THIN-FILMS; FE; FE(001); CR; FE(100); ORDER SO - Physics of Metals and Metallography 2001 ;91():S1-S8 2772 UI - 13926 AU - Depine RA AU - Valencia CI AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Grp Electromagnetismo Aplicado, RA-1428 Buenos Aires, DF, ArgentinaCICESE, Ensenada 22800, Baja California, MexicoDepine, RA, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Grp Electromagnetismo Aplicado, Ciudad Univ,Pabellon 1, RA-1428 Buenos Aires, DF, Argentina TI - Reciprocity relations for s-p polarization conversion in conical diffraction (vol 117, pg 223, 1995) MH - Argentina MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Correction AV - English IS - 0030-4018 UR - ISI:000168015700051 SO - Optics Communications 2001 ;190(1-6):391-391 2773 UI - 13643 AU - Derev'anko SA AU - Yampol'skii VA AU - Lyubimov OI AU - Perez-Rodriguez F AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoKharkov State Univ, UA-61077 Kharkov, UkraineNASU, Inst Radiophys & Elect, UA-61085 Kharkov, UkrainePerez-Rodriguez, F, Univ Autonoma Puebla, Inst Fis, Apdo Post J-48, Puebla 72570, Mexico TI - Effect of the stimulated transparency of a superconducting plate due to the nonlinear wave interaction AB - A novel nonlinear effect in the electrodynamics of hard superconductors is predicted and studied theoretically. It is shown that an electromagnetic wave (we call it base signal) can pass through a superconducting plate due to its interaction with another wave tan assisting signal) propagating in the opposite direction, even at small amplitudes of the base wave when it cannot reach the opposite boundary of the sample without assistance. The dependence of the surface impedance of the sample at the base frequency on the amplitude of the assisting wave is studied within the framework of the critical state model. The surface impedance is found to be drastically increased when the regions of wave penetration overlap and the wave interaction takes place. The real part of the surface impedance is shown to be negative (or higher than the impedance of vacuum) for some values of the parameters of the problem. This phenomenon occurs due to a considerable redistribution of energy between the interacting waves. We use the obtained results for a qualitative description of available experimental data. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000168775300007 L2 - high-T-c superconductors;critical state;wave interaction;HIGH-TC SUPERCONDUCTORS; REINTERPRETATION; DEPENDENCE; ABSORPTION; EXCITATION; CRYSTAL SO - Physica C 2001 ;353(1-2):38-48 2774 UI - 11176 AU - DeSantiago S AU - Torres N AU - Hutson S AU - Tovar AR AD - Inst Nacl Nutr Salvador Zubiran, Dept Nutr Physiol, Mexico City 14000, DF, MexicoWake Forest Univ, Bowman Gray Sch Med, Dept Biochem, Winston Salem, NC 27157, USADeSantiago, S, Inst Nacl Nutr Salvador Zubiran, Dept Nutr Physiol, Mexico City 14000, DF, Mexico TI - Induction of expression of branched-chain aminotransferase and alpha-keto acid dehydrogenase in rat tissues during lactation AB - This study was designed to determine the effect of lactation and weaning on the gene expression of branched-chain aminotransaminase (BCAT) and branched-chain a-keto acid dehydrogenase (BCKD) in different tissues of the lactating rat. BCAT activity increased in mammary tissue during lactation and was 6-fold higher than in virgin rats. This increase was associated with an increase in protein levels measured by immunoblot analysis, and with an increase in BCAT mitochondrial (BCATm) mRNA concentration. Twenty-four hours after weaning, BCAT activity, protein concentration, and mRNA levels in the dam decreased. BCAT activity, protein enzyme levels, and BCATm mRNA concentration in muscle were higher in weaning rats than in lactating rats. BCAT cytosolic (BCATc) mRNA was not expressed in mammary tissue, and there was no BCATc enzyme detected by Western blot in any physiological state. Mammary tissue BCKD activity increased and was active (dephosphorylated) during the lactation period. The level of enzyme also increased and the mRNA level for the E2 subunit in mammary tissue was 10-fold higher than the virgin values. Hepatic enzyme activity increased during weaning, and this was associated with the protein level and with the mRNA level of the E2 subunit. Muscle BCKD activity and protein content were the lowest of all tissues, and the E2 subunit mRNA level was barely detected by Northern blot analysis. The results suggest gene regulation of the two main catabolic enzymes of the branched-chain amino acid metabolism during lactation MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental U5 - S;Article AV - English IS - 0065-2598 UR - ISI:000175455800009 L2 - SKELETAL-MUSCLE; MAMMARY TISSUE; DAM RAT; METABOLISM; LIVER; LEUCINE; ISOENZYME; BRAIN; MOUSE SO - Bioactive Components of Human Milk 2001 ;501():93-99 2775 UI - 14241 AU - Descroix L AU - Viramontes D AU - Vauclin M AU - Barrios JLG AU - Esteves M AD - IRD, LTHE, UMR 5564, F-38041 Grenoble 9, FranceInst Geog Alpine, F-38031 Grenoble, FranceCNRS, LTHE, UMR 5564, F-38041 Grenoble, FranceINIFAP Cenid Raspa, Gomez Palacio, MexicoDescroix, L, IRD, LTHE, UMR 5564, BP 53, F-38041 Grenoble 9, France TI - Influence of soil surface features and vegetation on runoff and erosion in the Western Sierra Madre (Durango, Northwest Mexico) AB - In mountainous areas, runoff and soil erosion are closely linked to soil surface features, particularly stoniness. Depending on the size of rock fragments (gravel, pebbles, stones and/or blocks) and especially the way they are integrated into the soil matrix, they may facilitate or hinder infiltration and promote soil losses. The present study examines the role of different soil surface features and their influence on runoff formation and on soil erosion in an area seriously affected by overgrazing. Based on measurements made on hillslopes for 2 years at the plot scale, the results show that grass cover, pebbles and sand content increase runoff and erosion. Inversely, slope value, tree cover percentage, structural stability and organic matter content are negatively correlated with runoff and soil losses. It is shown that the correlations can be explained by the major role played by the surface features on hydrologic behaviour of the hillslopes. Two main surface features were identified and hydraulically characterised, namely: (i) crusted surfaces with embedded gravel widespread on gentle slopes which induce high runoff and erosion rates; and (ii) stony surfaces, where free pebbles and blocks protect the top soil against raindrops and overland flow kinetic energy and lead to reduce runoff and soil losses. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Durango PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Geosciences, Multidisciplinary;Soil Science;Water Resources U5 - J;Article AV - English IS - 0341-8162 UR - ISI:000167196100003 L2 - runoff;soil losses;Western Sierra Madre;overgrazing;crusted soils;hydraulic properties;ROCK FRAGMENTS; COVER; RAINFALL; INFILTRATION; ARIZONA SO - Catena 2001 ;43(2):115-135 2776 UI - 12380 AU - Deserno M AU - Jimenez-Angeles F AU - Hohn C AU - Lozada-Cassou M AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoMax Planck Inst Polymer Res, D-55128 Mainz, GermanyUniv Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoDeserno, M, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Overcharging of DNA in the presence of salt: Theory and simulation AB - A study of a model rodlike polyelectrolyte molecule immersed in a monovalent or divalent electrolyte is presented. Results for the local concentration profile, mean electrostatic potential, charge distribution function, and zeta -potential are obtained from hypernetted-chain/mean spherical approximation (HNC/MSA) theory and compared with molecular dynamics (MD) simulations. As a particular case, the parameters of the polyelectrolyte molecule are mapped to those of a DNA molecule. Both HNC/MSA and MD predict the occurrence of overcharging, which is not present in the Poisson-Boltzmann theory. Further an excellent qualitative, and in some cases quantitative, agreement between HNC/MSA and MD is found. Oscillations observed in the mean electrostatic potential, local concentration profiles, and the curvature of the zeta -potential are discussed in terms of the observed overcharging effect. Particularly interesting results are a very nonmonotonic behavior of the potential, as a function of the rod charge density, and the overcharging by monovalent counterions MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 42 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000172049100034 L2 - MONTE-CARLO SIMULATION; HYPERNETTED CHAIN APPROXIMATION; SPHERICAL COLLOIDAL PARTICLE; ELECTRICAL DOUBLE-LAYERS; CONFINED CHARGED FLUIDS; ELECTROPHORETIC MOBILITY; NUMERICAL-SOLUTION; POLY-ELECTROLYTE; MULTIVALENT IONS; EWALD SUMS SO - Journal of Physical Chemistry B 2001 ;105(44):10983-10991 2777 UI - 14004 AU - DeSouza O AU - Miramontes O AU - Santos CA AU - Bernardo DL AD - Univ Fed Vicosa, Dept Biol Anim, BR-36571000 Vicosa, MG, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, MexicoDeSouza, O, Univ Fed Vicosa, Dept Biol Anim, BR-36571000 Vicosa, MG, Brazil TI - Social facilitation affecting tolerance to poisoning in termites (Insecta, Isoptera) AB - Previous works have shown that social interactions may enhance termite ability to overcome physiological stresses such as starvation and disease. We evaluated the effects of group size on termite tolerance to poisoning, by submitting groups of Cornitermes cumulans workers to an organophosphorus insecticide (chlorpyrifos). Survival of both, poisoned and non-poisoned termites, depended on the number of individuals in the group, presenting a peak at an density around 8 individuals/test tube. Survival of poisoned termites, however, showed a peak much lower than that of non-poisoned termites. We conclude, therefore, that socially induced ability to overcome physiological stresses in termites may be expressed even under "non-natural" stresses, such as poisoning by insecticides. The mechanisms leading to such a result remain to be investigated. It seems, however, that social facilitation may enhance (or trigger) biochemical and/or neurophysiological mechanisms that collaterally may help in the detoxification of insecticides in termites. In addition, we warn that laboratory experiments with termites/insecticide may be severely affected by the group size being tested MH - Brazil MH - Mexico|Distrito Federal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0020-1812 UR - ISI:000167893600003 L2 - termites;social facilitation;physiological stress;insecticide;group effects SO - Insectes Sociaux 2001 ;48(1):21-24 2778 UI - 12711 AU - DeVinney R AU - Puente JL AU - Gauthier A AU - Goosney D AU - Finlay BB AD - Univ British Columbia, Biotechnol Lab, Vancouver, BC V6T 1Z3, CanadaUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62191, Morelos, MexicoUniv British Columbia, Dept Biochem, Vancouver, BC V6T 1Z3, CanadaUniv British Columbia, Dept Microbiol & Immunol, Vancouver, BC V6T 1Z3, CanadaDeVinney, R, Univ Calgary, Hlth Sci Ctr, Rm 278 HMRB,3330 Hosp Dr NW, Calgary, AB T2N 4N1, Canada TI - Enterohaemorrhagic and enteropathogenic Escherichia coli use a different Tir-based mechanism for pedestal formation AB - Enterohaemorrhagic Escherichia coli (EHEC) adheres to the host intestinal epithelium, resulting in the formation of actin pedestals beneath adhering bacteria. EHEC and a related pathogen, enteropathogenic E. coli (EPEC), insert a bacterial receptor, Tir, into the host plasma membrane, which is required for pedestal formation. An important difference between EPEC and EHEC Tir is that EPEC but not EHEC Tir is tyrosine phosphorylated once delivered into the host. In this study, we assessed the role of Tir tyrosine phosphorylation in pedestal formation by EPEC and EHEC. In EPEC, pedestal formation is absolutely dependent on Tir tyrosine phosphorylation and is not complemented by EHEC Tir. The protein sequence surrounding EPEC Tir tyrosine 474 is critical for Tir tyrosine phosphorylation and pedestal formation by EPEC. In contrast, Tir tyrosine phosphorylation is not required for pedestal formation by EHEC. EHEC forms pedestals with both wild-type EPEC Tir and the nontyrosine-phosphorylatable EPEC Tir Y474F. Pedestal formation by EHEC requires the type III delivery of additional EHEC factors into the host cell. These findings highlight differences in the mechanisms of pedestal formation by these closely related pathogens and indicate that EPEC and EHEC modulate different signalling pathways to affect the host actin cytoskeleton MH - Canada MH - Mexico|Morelos PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 46 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000171314600018 L2 - ALDRICH-SYNDROME PROTEIN; TRANSLOCATED INTIMIN RECEPTOR; O157-H7 REQUIRES INTIMIN; ACTIN-BASED MOTILITY; EPITHELIAL-CELLS; SIGNAL-TRANSDUCTION; ARP2/3 COMPLEX; PATHOGENICITY ISLAND; SURFACE APPENDAGES; ALPHA-ACTININ SO - Molecular Microbiology 2001 ;41(6):1445-1458 2779 UI - 12686 AU - Dhawan V AU - Mirabel IF AU - Rodriguez LF AD - NRAO, Socorro, NM, USACEA Saclay, F-91191 Gif Sur Yvette, FranceUNAM, Mexico City, DF, MexicoDhawan, V, NRAO, Socorro, NM, USA TI - GRS 1915+105: VLBA images of the AU-scale jet AB - High-resolution observations of GRS 1915+105 are summarized. For full discussion see Astrophys. J. 543. 1 November 2000; astro-ph/0006086 MH - France MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000171500900029 SO - Astrophysics and Space Science 2001 ;276():107-108 2780 UI - 12637 AU - Di Fabio JL AU - Castaneda E AU - Agudelo CI AU - De la Hoz F AU - Hortal M AU - Camou T AU - Echaniz-Aviles G AU - Barajas MNC AU - Heitmann I AU - Hormazabal JC AU - Brandileone MCC AU - Vieira VSD AU - Regueira M AU - Ruvinski R AU - Corso A AU - Lovgren M AU - Talbot JA AU - De Quadros C AD - Pan Amer Hlth Org, Div Vaccines & Immunizat, Washington, DC, USAInst Nacl Salud, Bogota, ColombiaDept Labs Salud Publ, Montevideo, UruguayInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoInst Salud Publ Chile, Santiago, ChileInst Adolfo Lutz Registro, Sao Paulo, BrazilANLIS Dr Carlos Malbran, Inst Nacl Enfermedades Infecciosas, Buenos Aires, DF, ArgentinaHosp Municipal M Durand, Buenos Aires, DF, ArgentinaDi Fabio, JL, Pan Amer Hlth Org, Div Vaccines & Immunizat, Washington, DC USA TI - Evolution of Streptococcus pneumoniae serotypes and penicillin susceptibility in Latin America, Sireva-Vigia Group, 1993 to 1999 AB - Background. Since 1993 the Pan American Health Organization has coordinated a surveillance network with the National Reference Laboratories of Argentina, Brazil, Chile, Colombia, Mexico and Uruguay aimed at monitoring capsular types and antimicrobial susceptibility of Streptococcus pneumoniae causing invasive disease in children <6 years of age. Methods. The surveillance system included children 6 years of age and younger with invasive disease caused by S. pneumoniae. The identification, capsular typing and susceptibility to penicillin of the isolates were conducted using a common protocol, based on standard methodologies. Results. By June, 1999, 4105 invasive pneumococcal isolates had been collected mainly from pneumonia (44.1%) and meningitis (41.1%) cases. Thirteen capsular types accounting for 86.1% of the isolates (14,6A/6B, 5,1,23F, 19F, 18C, 19A, 9V, 7F, 3, 9N and 4) remained the most common types during the surveillance period. Diminished susceptibility to penicillin was detected in 28.6% of the isolates, 17.3% with intermediate and 11.3% with high level resistance. Resistance varied among countries and increased during this period in Argentina, Colombia and Uruguay. Serotypes 14 and 23F accounted for 66.6% of the resistance. Conclusion. These surveillance data clearly demonstrate the potential impact of the introduction of a conjugate vaccine on pneumococcal disease and the need for more judicious use of antibiotics to slow or reverse the development of antimicrobial resistance MH - Argentina MH - Brazil MH - Chile MH - Colombia MH - USA MH - Mexico|Morelos MH - Uruguay PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 34 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000171529500007 L2 - Streptococcus pneumoniae;serotypes;penicillin susceptibility;Latin America;TRIMETHOPRIM-SULFAMETHOXAZOLE RESISTANCE; PNEUMOCOCCAL CONJUGATE VACCINE; ANTIMICROBIAL RESISTANCE; CAPSULAR TYPES; INVASIVE INFECTIONS; SYSTEMIC INFECTIONS; CHILDREN; SURVEILLANCE; STRAINS; EPIDEMIOLOGY SO - Pediatric Infectious Disease Journal 2001 ;20(10):959-967 2781 UI - 13877 AU - Di Pietro A AU - Huertas-Gonzalez MD AU - Gutierrez-Corona JF AU - Martinez-Cadena G AU - Meglecz E AU - Roncero MIG AD - Univ Cordoba, Fac Ciencias, Dept Genet, Cordoba 14071, SpainUniv Guanajuato, Fac Quim, Inst Invest Biol Expt, Guanajuato, MexicoDi Pietro, A, Univ Cordoba, Fac Ciencias, Dept Genet, Avda S Alberto Magno S-N, Cordoba 14071, Spain TI - Molecular characterization of a subtilase from the vascular wilt fungus Fusarium oxysporum AB - The gene prt1 was isolated from the tomato vascular wilt fungus Fusarium oxysporum f. sp. lycopersici, whose predicted amino acid sequence shows significant homology with subtilisin-like fungal proteinases, Prt1 is a single-copy gene, and its structure is highly conserved among different formae speciales of F. oxysporum. Prt1 is expressed constitutively at low levels during growth on different carbon and nitrogen sources and strongly induced in medium containing collagen and glucose. As shown by reverse transcription-polymerase chain reaction and fluorescence microscopy of E oxysporum strains carrying a propromoter-green fluorescent protein fusion, prt1 is expressed at low levels during the entire cycle of infection on tomato plants. F, oxysporum strains transformed with an expression vector containing the prt1 coding region fused to the inducible endopolygalacturonase pg1 gene promoter and grown under promoter-inducing conditions secreted high levels of extracellular subtilase activity that resolved into a single peak of pi 4.0 upon isoelectric focusing, The active fraction produced two clearing bands of 29 and 32 kDa in sodium dodecyl sulfate gels containing gelatin. Targeted inactivation of prt1 in E oxysporum f,sp. lycopersici had no detectable effect on mycelial growth, sporulation, and pathogenicity on tomato plants MH - Mexico|Guanajuato MH - Spain PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000168142300007 L2 - F-SP LYCOPERSICI; GREEN FLUORESCENT PROTEIN; TRITIRACHIUM-ALBUM LIMBER; CELL-WALL; SACCHAROMYCES-CEREVISIAE; EXTRACELLULAR PROTEASES; METARHIZIUM-ANISOPLIAE; ASPERGILLUS-NIDULANS; ALKALINE PROTEASE; PECTATE LYASE SO - Molecular Plant-Microbe Interactions 2001 ;14(5):653-662 2782 UI - 12495 AU - Diaz F AU - Farfan C AU - Sierra E AU - Re AD AD - CICESE, Dept Acuicultura, Ensenada, Baja California, MexicoDiaz, F, Dept Aquaculture, POB 434844, San Diego, CA 92143, USA TI - Effects of temperature and salinity fluctuation on the ammonium excretion and osmoregulation of juveniles of Penaeus vannamei, Boone AB - This study assesses the effect of temperature and fluctuations in salinity on the nitrogen excretion and osmoregulation of Penaeus vannamei juveniles to determine the lowest stress combination so that these can be used to optimize production of the Mexican strain in culture. The ammonium excretion rate of juveniles acclimated to 20, 24, 28 and 32 degreesC was measured. Fluctuating salinity levels were applied to these animals in a sequence of 40 parts per thousand, 33, 25, 18, 11, 18, 25, 33 and back to 40 parts per thousand. The results indicate that when the salinity was reduced from 40 to 11 parts per thousand the ammonium excretion of the shrimp was reduced. The osmotic concentration of the animals was hyposmotic as the salinity decreased from 40 to 25 parts per thousand, hyperosmotic during the 18-11-18 in V. interval and hyposmotic as the salinity increased from 25 to 40 parts per thousand again. The range of isomotic points over this range of salinity was 712-777 mmol Kg(-1). The ammonium excretion of P. vannamei exposed to these experimental conditions can be attributed to the process of osmoregulation because excretion was increased when the shrimp were hyper-regulating and reduced when they were hypo-regulating. Based on our results, the animals experience the lowest stress in a temperature between 27 to 30 degreesC and a salinity close to the isosmotic, point between 25-27 parts per thousand. We propose that this should prove to be the optimal temperature and salinity regime for culturing the Mexican strain of P. vannamei MH - Mexico|Baja California MH - USA PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 11 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0091-181X UR - ISI:000171929400002 L2 - Penaeus vannamei;salinity fluctuation;ammonium excretion;osmoregulation;OXYGEN-CONSUMPTION; N EXCRETION; HEMOLYMPH OSMOLALITY; MONODON FABRICIUS; TISSUE WATER; RESPONSES; SURVIVAL; SHRIMP; GROWTH; CHLORIDE SO - Marine and Freshwater Behaviour and Physiology 2001 ;34(2):93-104 2783 UI - 13844 AU - Diaz M AU - Rosado JL AU - Salas R AU - Munoz EC AU - Westcott JE AD - Inst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Queretaro, Mexico City 14000, DF, MexicoUniv Colorado, Hlth Sci Ctr, Denver, CO 80262, USA TI - Bioavailability of zinc sulfate and zinc oxide added to corn tortilla. A study using stable isotopes MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167454200108 SO - Faseb Journal 2001 ;15(5):A732-A732 2784 UI - 13326 AU - Diaz SC AU - Touchan R AU - Swetnam TW AD - Ctr Invest Biol Noroeste, La Paz 23090, BCS, MexicoUniv Arizona, Tree Ring Res Lab, Tucson, AZ 85721, USADiaz, SC, Ctr Invest Biol Noroeste, Mar Bermejo 195 Co Playa Palo Santa Rita, La Paz 23090, BCS, Mexico TI - A tree-ring reconstruction of past precipitation for Baja California Sur, Mexico AB - There is great interest in the climatic variability of Baja California and the Sea of Cortes, but long-term information is limited because instrumental climate records begin in the 1940s or 1960s. The first tree-ring chronology of Pinus lagunae was developed from the southern part of the Baja California Peninsula and the chronology is used to reconstruct the history of precipitation variations. A September-July precipitation reconstruction is developed for the period AD 1862-1996 (R = 0.71, p < 0.0001, n = 56, cross-validation = 0.68. This reconstruction is used to assess precipitation variability over the past two centuries, including the relationship with ENSO events. The reconstructed precipitation series indicates a long drought period from 1939 to 1958. It also shows that 1983, one of the strongest El Nino events of the 20th century, is the wettest year. El Nino events during the 20th century are associated with above-normal precipitation, whereas La Nina events are characterized by below-normal precipitation. Four of the most extreme wet years occurred in association with these warm events (1905, 1912, 1919 and 1983). Seventy-one percent of La Nina events are characterized by below-normal precipitation. Sixty-two percent of Fl Nino events are characterized by above-normal precipitation. Tree-ring growth of P. lagunae is most strongly correlated with winter precipitation in Sonora, Sinaloa and southern Baja California Sur. Precipitation data from meteorological stations in northern Baja California do not correlate well with the tree-ring chronology because this zone has a Mediterranean climate, which differs from the rest of northwest Mexico. Copyright (C) 2001 Royal Meteorological Society MH - Mexico|Baja California Sur MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 12 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0899-8418 UR - ISI:000169831700005 L2 - Baja California Sur, Mexico;dendroclimatology;ENSO-precipitation;Pinus lagunae;Sierra de La Laguna;SOUTHERN OSCILLATION; VARIABILITY; SOUTHWEST; RAINFALL; PACIFIC; SERIES SO - International Journal of Climatology 2001 ;21(8):1007-1019 2785 UI - 13863 AU - Dikranjan D AU - Tkacenko M AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Udine, Dipartimento Matemat & Informat, I-33100 Udine, ItalyTkacenko, M, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Campus Iztapalapa, Mexico City 09340, DF, Mexico TI - Weakly complete free topological groups AB - A topological group G is sequentially, complete if it is sequentially dosed in any other topological group. We show that for Tychonoff space;X, the free topological group F(X) is sequentially complete iff. the free Abelian topological group A(X) is sequentially complete iff. X is sequentially closed in betaX. Furthermore, the free precompact Abelian group F(X, PA) is sequentially complete iff the space X is sequentially closed in betaX. We consider also other forms of weak completeness, namely omega -completeness and k-completeness, introduced analogously by means of the omega -closure and the k-closure. We prove that the groups A(X) and P(X) are omega -complete (k-complete) iff X is omega -closed (k-closed) in the Dieudonne completion muX of X, (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000168205600003 L2 - free (Abelian) topological group;complete group;omega-bounded group;compact group;sequentially closed;sequentially complete;Dieudonne completion;Stone-Cech compactification SO - Topology and Its Applications 2001 ;112(3):259-287 2786 UI - 14149 AU - Dikranjan D AU - Tkacenko M AD - Univ Udine, Dipartimento Matemat & Informat, I-33100 Udine, ItalyUniv Autonoma Metropolitana, Dept Matemat, Mexico City, DF, MexicoDikranjan, D, Univ Udine, Dipartimento Matemat & Informat, Via Sci 206, I-33100 Udine, Italy TI - Sequentially complete groups: dimension and minimality AB - A topological group G is called sequentially complete if it is sequentially closed in any ther topological group (or equivalently, G is sequentially closed in its Raikov completion (G) over tilde). We establish the following compactness criterion in the class of connected Abelian groups of non-measurable size: a group in this class is compact iff it is minimal and sequentially complete. We also describe the structure of sequentially complete minimal Abelian groups in the general case. Coincidence of hereditary disconnectedness and zero dimensionality is established for various classes of sequentially complete groups. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000167380000006 L2 - COUNTABLY COMPACT-GROUPS; TOPOLOGICAL-GROUPS; ABELIAN-GROUPS; PSEUDOCOMPACT; PRODUCTS SO - Journal of Pure and Applied Algebra 2001 ;157(2-3):215-239 2787 UI - 13957 AU - Distel H AU - Hudson R AD - Univ Munich, Inst Med Psychol, D-80336 Munich, GermanyNatl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoDistel, H, Univ Munich, Inst Med Psychol, Goethestr 31, D-80336 Munich, Germany TI - Judgement of odor intensity is influenced by subjects' knowledge of the odor source AB - Odor perception, including intensity, is affected by knowledge of odor source. For 76 subjects tested with 24 everyday odorants, ratings of intensity, pleasantness and familiarity were enhanced when subjects either could identify the odor source themselves or were provided with the name by the experimenter. Ratings were highest when subjects judged that the names provided matched their own perception, suggesting an interaction between individuals' cognitive representation of odors and their immediate perceptual experience MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 27 U4 - Behavioral Sciences;Food Science & Technology;Neurosciences;Physiology U5 - J;Article AV - English IS - 0379-864X UR - ISI:000168055400003 L2 - EVERYDAY ODORS; PERCEPTION; EXPECTATIONS; FAMILIARITY; EXPERIENCE SO - Chemical Senses 2001 ;26(3):247-251 2788 UI - 13966 AU - Dix J AU - Osorio M AU - Zepeda C AD - Univ Manchester, Dept Comp Sci, Manchester M13 9PL, Lancs, EnglandUniv Amer Sta Catarina Martir, Dept Ingn Sistemas Computacionales, Puebla 72820, MexicoBenemerita Univ Autonoma Pueble, Escuela Computac, Puebla 75570, MexicoDix, J, Univ Manchester, Dept Comp Sci, Oxford Rd, Manchester M13 9PL, Lancs, England TI - A general theory of confluent rewriting systems for logic programming and its applications AB - Recently, Brass and Dir showed (J. Automat. Reason. 20(1) (1998) 143-165) that the well founded semantics WFS can be defined as a confluent calculus of transformation rules. This led not only to a simple extension to disjunctive programs (J. Logic Programming 38(3) (1999) 167-213), but also to a new computation of the well-founded semantics which is linear for a broad class of programs. We take this approach as a starting point and generalize it considerably by developing a general theory of Confluent LP-systems CL. Such a system CL is a rewriting system on the set of all logic programs over a fixed signature L and it induces in a natural way a canonical semantics. Moreover, we show four important applications of this theory: (1) most of the well-known semantics are induced by confluent LP-sl sterns, (2) there are many more transformation rules that lean to confluent LP-systems, (3) semantics induced by such systems can be used to model aggregation, (4) the new systems can be used to construct interesting counterexamples to some conjectures about the space of well-behaved semantics. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0168-0072 UR - ISI:000168044400008 L2 - databases;logic in artificial intelligence;theory of data;aggregation;logic programming;nonmonotonic semantics;WELL-FOUNDED SEMANTICS; STABLE SEMANTICS; ITERATED GCWA SO - Annals of Pure and Applied Logic 2001 ;108(1-3):153-188 2789 UI - 14097 AU - Djenane D AU - Sanchez-Escalante A AU - Beltran JA AU - Roncales P AD - Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, Zaragoza 50013, SpainRoncales, P, Ctr Invest Alimentac & Desarrollo AC, Sonora, Mexico TI - Extension of the retail display life of fresh beef packaged in modified atmosphere by varying lighting conditions AB - The effect of Lighting conditions (darkness and either a standard supermarket fluorescent, a low-UV, color-balanced lamp, and the supermarket fluorescent with a UV filter) on the retail display life of fresh beef steaks packaged in a modified atmosphere was studied. Lighting without UV radiation led to a significant delay of meat spoilage, as assessed by surface color (a* and MetMb percentage), lipid oxidation (TBARS value), bacterial counts and sensory evaluation (discoloration and odor). Shelf life of fresh meat was extended from 12 to 22 to 28 d, similar to that of display in the darkness, by using either the low UV lamp or the fluorescent with a UV filter MH - Mexico|Sonora MH - Spain PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 32 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000167590500033 L2 - beef;modified atmospheres;retail display;lighting;UV radiation;COLOR; DISCOLORATION; STABILITY; PORK; MEAT; MUSCLE SO - Journal of Food Science 2001 ;66(1):181-186 2790 UI - 12801 AU - Dobbelaere S AU - Croonenborghs A AU - Thys A AU - Ptacek D AU - Vanderleyden J AU - Dutto P AU - Labandera-Gonzalez C AU - Caballero-Mellado J AU - Aguirre JF AU - Kapulnik Y AU - Brener S AU - Burdman S AU - Kadouri D AU - Sarig S AU - Okon Y AD - Hebrew Univ Jerusalem, Dept Plant Pathol & Microbiol, IL-76100 Rehovot, IsraelHebrew Univ Jerusalem, Fac Agr Food & Environm Qual Sci, Otto Warburg Ctr Agr Biotechnol, IL-76100 Rehovot, IsraelKatholieke Univ Leuven, Ctr Microbial & Plant Genet, Dept Appl Plant Sci, B-3001 Heverlee, BelgiumSecretary Agr, Dept Soil Microbiol, Montevideo 3208, UruguayUNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoINIFAP, Mexico City, DF, MexicoAgr Res Org, Volcani Ctr, Agron & Nat Resources Dept, IL-50250 Bet Dagan, IsraelOkon, Y, Hebrew Univ Jerusalem, Dept Plant Pathol & Microbiol, IL-76100 Rehovot, Israel TI - Responses of agronomically important crops to inoculation with Azospirillum AB - Azospirilla are free-living rhizobacteria that are able to promote plant growth and increase yields in many crops of agronomic importance. It is assumed that the bacteria affect plant growth mainly by the production of plant growth promoting substances, which leads to an improvement in root development and an increase in the rate of water and mineral uptake. In the present review, we discuss the physiological responses of the plant roots to inoculation with Azospirillum, and report on field and greenhouse experiments carried out with these bacteria during 1994-2001 in Belgium, Uruguay, Mexico and Israel MH - Belgium MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Uruguay PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 33 U4 - Plant Sciences U5 - J;Article AV - English IS - 0310-7841 UR - ISI:000171163000005 L2 - NOD-GENE INDUCERS; MAIZE ZEA-MAYS; BRASILENSE INOCULATION; WHEAT SEEDLINGS; ROOTS; GROWTH; RESPIRATION; PROMOTION; STRESS; IAA SO - Australian Journal of Plant Physiology 2001 ;28(9):871-879 2791 UI - 13902 AU - Dohnal V AU - Costas M AU - Carrillo-Nava E AU - Hovorka S AD - Inst Chem Technol, Dept Phys Chem, CR-16628 Prague 6, Czech RepublicUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Lab Termofis, Mexico City 04510, DF, MexicoDohnal, V, Inst Chem Technol, Dept Phys Chem, CR-16628 Prague 6, Czech Republic TI - Non-polar solutes in water and in aqueous solutions of protein denaturants. Modeling of solution and transfer processes AB - A simple molecular model for the thermodynamic behavior of non-polar solutes in water and in aqueous solutions of protein denaturants is presented. Three contributions are considered: (i) combinatorial arising from the mixing process, (ii) interactional characterizing the molecular interactions occurring in the mixture and (iii) a contribution originating from the structural changes occurring in the first shell of water molecules around the solute. The latter is modeled assuming that water molecules in contact with the solute are involved in a chemical equilibrium between two states. The model describes well the temperature and denaturant concentration dependences of the Gibbs energies of solution and transfer for benzene, toluene and alkanes in water and aqueous solutions of urea and guanidine hydrochloride. Model parameters are physically meaningful, allowing a discussion of the molecular interactions involved. A preferential solvation of the solute by the denaturant is found. However, the non-polar solute-denaturant interaction is not specific, i.e. leading to a distinct chemical entity. Urea and guanidine hydrochloride are non-polar solubilizing agents because their interactions with the solute are less unfavorable than those between water and the solute. (C) 2001 Elsevier Science B.V. All rights reserved MH - Czech Republic MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biophysics;Chemistry, Physical U5 - J;Article AV - English IS - 0301-4622 UR - ISI:000168157500007 L2 - protein unfolding;aqueous denaturant solvent;non-polar solute;hydrophobic hydration model;preferential solvation;limiting activity coefficient;AROMATIC-HYDROCARBONS; GUANIDINIUM CHLORIDE; TEMPERATURE-RANGE; LIQUID-MIXTURES; UREA; THERMODYNAMICS; STABILIZATION; DESTABILIZATION; DIFFRACTION; ENTHALPY SO - Biophysical Chemistry 2001 ;90(2):183-202 2792 UI - 12669 AU - Dominguez-Bello MG AU - Perez-Perez GI AU - Pacheco N AU - Gonzalez E AU - Garza-Gonzalez E AU - Mora R AU - Mago V AU - Gomez I AD - IVIC, Caracas, VenezuelaNYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USAGen Hosp, Puerto Ayacucho, VenezuelaUANL, Dept Microbiol, Monterrey, Nuevo Leon, MexicoGen Hosp, Caracas, Venezuela TI - Seroprevalence of Helicobacter pylori and CagA in areas of Venezuela with different gastric cancer risks MH - Mexico|Nuevo Leon MH - USA MH - Venezuela PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000171232500127 SO - Gut 2001 ;49():A36-A36 2793 UI - 12064 AU - Dominguez-Malagon H AU - Gaytan-Graham S AD - Inst Nacl Cancerol, Dept Patol Quirurg, Mexico City, DF, MexicoSudbury Reg Hosp, Dept Pathol, Sudbury, ON, CanadaDominguez-Malagon, H, Inst Nacl Cancerol, Dept Patol Quirurg, Av San Fernando 22, Mexico City, DF, Mexico TI - Hepatocellular carcinoma: An update AB - Hepatocellular carcinoma (HCC) is the most common malignant tumor of males in the world, with an incidence of 1,000,000 new cases a year. It is endemic in Southeast Asia and Sub-Saharan Africa, Risk factors include chronic infection with hepatitis B virus (HBV) and hepatitis C virus (HCV), Aflatoxin B1 uptake, hemochromatosis, and alpha1-antitripsin deficiency, Epidemiological studies provide evidence for the association of HCC with HBV infection. The incidence of HCC is high in regions hyperendemic for HBV, Chronic carrier state and maternal-infant transmission are important factors in the development of HCC, Evidence of direct oncogenic effect of HBV is well established, HCCs contain viral DNA sequences integrated into hepatocyte DNA that act as random insertional mutagens, and these sites are near genes involved in the control of proliferation and differentiation. The mechanism of hepatitis C virus in hepatocarcinogenesis is still imprecise but a high percentage of cases are related to this virus, Chronic alcohol consumption and cirrhosis are cofactors that increase the development of HCC in patients with chronic viral infection, In experimental carcinogenesis a multipotential element called oval cell proliferates in the early stages, The cellular events are accompanied by increased expression of several growth factors that enhance the survival of carcinogen-activated cells by suppressing apoptosis and increasing elements entering the cell cycle, Hepatic carcinogenesis is a complex process associated with accumulation of genetic and epigenetic changes that run through steps of initiation, promotion and progression. Activation of oncogenes of the "ras" family and others has been detected during chemically-induced HCC in rodents, but there is little evidence of such activation in human tumors. The role of tumor supressor genes such as retinoblastoma (RB) and P53 genes has been documented. Aflatoxin B1 that contaminates foods in endemic areas has a clear role in hepatocarcinogenesis. Metabolites of this toxin promote apurinic sites and G to T mutations in chromosomal DNA, the third base of codon 249 of the P53 gene is preferentially targeted to form aducts with aflatoxin B1, and this mutation has been specifically identified in HBV infection, Histological and cytological criteria for the diagnosis of HCC are well established and are based in architectural and cytological changes. An important issue is the diagnosis of liver "nodules" detected by image, from which small biopsies or aspiration material is obtained. Special studies such as reticulin, CD34, cytokeratin profile, and MOC-31 can be very useful for the differential diagnosis of primary and metastatic tumors. Telomerase activity has been found in HCC and negative in pericancerous tissue, It is more pronounced in poorly differentiated tumors and correlates with factors of clinical importance, such as prognosis and recurrences, Cells of well-differentiated HCC have an ultrastructural appearance similar to normal hepatocytes, During the process of dedifferentiation, there is progressive loss of organization of intracellular organelles. The cell cohesion is lost, intercellular gaps with microvilli appear, the sinusoids become capillarized, and reparative changes are seen in the spaces of Disse. A variety of inclusions, such as Mallory bodies, granular material, secondary lysosomes, and Dubin-Johnson pigment, have been described. Fibrolamellar carcinoma has a characteristic histological picture and ultrastructurally oncocytic features. Neuroendocrine granules and combination of HCC with bile duct carcinoma are seen by electron microscopy MH - Canada MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 41 U4 - Microscopy;Pathology U5 - J;Review AV - English IS - 0191-3123 UR - ISI:000173005100009 L2 - HEPATITIS-B VIRUS; NEEDLE ASPIRATION BIOPSY; TUMOR-SUPPRESSOR GENES; GROWTH-FACTOR-ALPHA; MOUSE-LIVER TUMORS; HA-RAS GENE; C-KI-RAS; POLYCLONAL CARCINOEMBRYONIC ANTIGEN; P53 GENE; OVAL CELLS SO - Ultrastructural Pathology 2001 ;25(6):497-516 2794 UI - 13140 AU - Dominguez-Rodriguez JR AU - Gomez-Contreras PC AU - Hernandez-Flores G AU - Lerma-Diaz JM AU - Carranco A AU - Cervantes-Munguia R AU - Orbach-Arbouys S AU - Bravo-Cuellar A AD - Univ Guadalajara, CUCS, Ctr Invest Biomed Occidente, Programa Maestria Ciencias Medicas,IMSS, Guadalajara, Jalisco, MexicoHop Suisse Paris, Issy Les Moulineaux, FranceBravo-Cuellar, A, Univ Guadalajara, CUCS, Ctr Invest Biomed Occidente, Programa Maestria Ciencias Medicas,IMSS, AP 1-3838, Guadalajara, Jalisco, Mexico TI - In vivo inhibition by antioxidants of adriamycin-induced apoptosis in murine peritoneal macrophages AB - Adriamycin (ADM) is an oncostatic of the anthracycline family with confirmed experimental and clinical efficiency. This antitumoral drug has been reported to stimulate macrophage activity and is able to induce apoptosis (AP) in some tumour cells. The objective of the present work was to investigate if in vivo administration of ADM to mice induces AP in their peritoneal macrophages (PM). AP was expressed by the apoptotic index (AI) of peritoneal macrophages observed under fluorescence microscope after ethidium bromide and acridine orange staining and confirmed by detection of the ladder pattern on DNA electrophoresis, indicates DNA fragmentation in 80-120 by characteristic of apoptotic state. 24 hours after i.p ADM administration, AP was observed in PM. The effect was best visible after the injection of 5 mg/kg ADM. (AI : 76.3 +/- 8.9 vs untreated control group AI : 2.8 +/- 1.1). In the ADM heated group a DNA ladder electrophoretic pattern was observed while DNA from normal PM was genomic. Since ADM toxicity has been attributed to reactive oxygen species generation, we investigated its possible participation in AP induction by pretreating mice with antioxidants : (+)-a-tocopherol acid succinate (30 IU/mouse per os) for 3 days before ADM administration with E. coli lipopolysacharide (0.15 mug/mouse i.p.) 24 hours before ADM administration or with superoxide dismutase (10,000 IU/mouse i.p.) 1 hour before ADM administration. AI was significantly decreased, with values close to those of the untreated control group (AI : 15 +/- 5.7, 9.6 +/- 8.0 and 32.9 +/- 6.9, respectively). Antioxidants given before ADM treatment significantly increased the live cell index (p less than or equal to 0.001) in all the groups while inactivated antioxidants no longer protect PM against the ADM AP induction. DNA analysis confirmed the effect: in the untreated control and in the antioxidant protected groups DNA was genomic while in either ADM or inactivated-antioxidants + ADM treated groups, DNA presented the ladder pattern. AP can thus be induced in PM by ADM and inhibited by antioxidants. These observations may have clinical applications MH - France MH - Mexico|Jalisco PB - ATHENS: INT INST ANTICANCER RESEARCH RP - NOT IN FILE U3 - TC 10 U4 - Oncology U5 - J;Article AV - English IS - 0250-7005 UR - ISI:000170276600026 L2 - apoptosis;macrophages;adriamycin;antioxidants;THYMOCYTES; EXPRESSION SO - Anticancer Research 2001 ;21(3B):1869-1872 2795 UI - 12272 AU - Dominguez A AU - Gutierrez M AU - Vazquez FA AD - SW Missouri State Univ, Dept Geog Geol & Planning, Springfield, MO 65802, USAUniv Autonoma Ciudad Juarez, Ctr Estudios Med Ambiente, Cd Juarez, Chihuahua, MexicoGutierrez, M, SW Missouri State Univ, Dept Geog Geol & Planning, Springfield, MO 65802 USA TI - Quantitative evaluation of atmospheric deposition flux of mercury in sediments within the city of Juarez, Mexico AB - The city of Juarez is located in the northern part of Mexico at the border with the United States. This report investigates the mercury (Hg) contribution from atmospheric sources and its accumulation in the Juarez area estimated by measuring the concentration of total Hg in sediments of a small artificial pond located within the urban area of the Juarez-El Paso metroplex. The pond is intermittently fed by Hb free (concentration below detection levels) groundwater from a private well, with sporadic input of storm overflow from a nearby water treatment facility. Total Hg concentrations in the sediments varied between 20 (detection level value) and 454 mug kg(-1) dry wt, with an average value of 202.8 +/- 153.9 mug kg(-1). Physical characteristics of the sediments varied among samples, although not as drastically as their Hg content did. Among the sediment parameters, the organic matter content correlated best with the Hg content. A simplified balance of total mercury supply in the aquatic system revealed a sediment Hg flux of 336.0 mug m(-2) yr(-1) and a maximum Hg atmospheric flux of 119 mg m(-2) yr(-1). Our unexpected finding of significant concentrations of Hg in the treated wastewater and in the water column stresses the need of careful consideration of all possible sources in determining mercury atmospheric deposition flux MH - Mexico|Chihuahua MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000172422300005 L2 - artificial pond;atmospheric flux;Juarez;mercury;sediment SO - Water Air and Soil Pollution 2001 ;132(3-4):263-274 2796 UI - 14317 AU - Dominguez M AU - Cacoub P AU - de la Torre IG AU - Piette JC AU - Salazar-Paramo M AU - Godeau P AU - ngles-Cano E AD - CHU Bicetre, INSERM, U143, Paris, FranceGrp Hosp Pitie Salpetriere, Dept Internal Med, F-75634 Paris, FranceHosp Gen Occidente, Dept Immunol & Rheumatol, Guadalajara, Jalisco, MexicoUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoAngles-Cano, E, INSERM, U143, 84 Rue Gen Leclerc, F-94276 Le Kremlin Bicetre, France TI - Autoantibodies to receptor induced neoepitopes of fibrinolytic proteins in rheumatic and vascular diseases AB - Objective. Abnormal plasminogen activation has been implicated in vascular and rheumatic diseases. The development of an autoimmune response to neoepitopes of plasminogen and its activator (tissue-type plasminogen activator. t-PA) was explored in sera from patients with rheumatoid arthritis (RA. n = 30). Behcet's disease (n = 20), primary antiphospholipid syndrome (APS, n = 23), and idiopathic arterial (n = 33) or venous thrombosis (n = 16). Methods. Sera diluted 1/50 were incubated with tither plasminogen or t-PA bound to their natural receptors (immobilized fibrin or monocytic cells), and bound immunoglobulins were detected using a sheep peroxidase labeled anti-human Fab IgG. Controls included plates coated with fibrin or cells alone or plasminogen passively adsorbed to the plastic. Sera were considered positive when the absorbance at 405/490 nm was above the mean + 2 SD of normal sera. Results. Reactivity of sera against plasminogen bound to cells (28%) or to fibrin (22%) was a predominant feature in patients with RA compared with other patient groups and controls. However. some patients with primary APS had reactivity against cell and fibrin bound plasminogen (9 and 13%, respectively). Autoantibodies against fibrin bound t-PA were detected in only 8% of patients with arterial or venous thrombosis. Conclusion. Conformational changes induced by molecular assembly of plasminogen on cell or fibrin surfaces result in the expression of neoepitopes recognized by autoantibodies. These autoantibodies could be markers of the proteolytic events associated with plasminogen activation in autoimmune diseases MH - France MH - Mexico|Jalisco PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 7 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000166973300015 L2 - autoantibodies;tissue-type plasminogen activator;plasminogen;fibrin bound t-PA;TISSUE-PLASMINOGEN-ACTIVATOR; CELL-LINE THP-1; PULMONARY-HYPERTENSION; ANTIBODIES; BINDING; UROKINASE; ARTHRITIS; AFFINITY; FIBRINOGEN; LYSINES SO - Journal of Rheumatology 2001 ;28(2):302-308 2797 UI - 13426 AU - Dominguez R AU - Quintero-Ramos A AU - Bourne M AU - Barnard J AU - Talamas-Abbud R AU - Jimenez-Castro J AU - nzaldua-Morales A AD - Univ Autonoma Chihuahua, Fac Chem, Postgrad Studies Dept, Chihuahua, MexicoCornell Univ, New York State Agr Expt Stn, Inst Food Sci, Geneva, NY 14456, USAQuintero-Ramos, A, Univ Autonoma Chihuahua, Fac Chem, Postgrad Studies Dept, Chihuahua, Mexico TI - Texture of rehydrated dried bell peppers modified by low-temperature blanching and calcium addition AB - Diced green bell pepper was blanched twice, once at 51-79 degreesC for 19-61 min, and once at 95 degreesC for 3 min, and dried. The firmness of rehydrated samples was measured by puncture, and optimum conditions assessed by response surface methodology. The optimized model showed that, blanching at 65 degreesC for 49 min gave a 64% increase in puncture force over the control. The optimum temperature was used to evaluate the effect of adding CaCl2. The dices were blanched twice, once at 65 degreesC for 3 min in either 0 or 4% CaCl2, secondly in either 0 or 2% CaCl2 solution at 95 degreesC for 3 min. In the second case the dices had been held at room temperature for 0-30 min before treatment. Adding CaCl2 increased puncture force significantly (P less than or equal to 0.05). The best results, those which gave greatest firmness, were obtained by blanching at 65 degreesC for 3 min in 4% CaCl2, holding for 16 min after blanching, followed by a secondary blanching at 95 degreesC in 2% CaCl2 MH - Mexico|Chihuahua MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0950-5423 UR - ISI:000169472700008 L2 - calcium chloride;firmness;optimization;pectins;puncture force;CARROTS; FIRMNESS; CHEMISTRY SO - International Journal of Food Science and Technology 2001 ;36(5):523-527 2798 UI - 12524 AU - Dong SH AD - Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, EnglandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England TI - Schrodinger equation with the potential V(r) = Ar-4+Br-3+Cr-2+Dr(-1) AB - By applying a factorization ansatz to the eigenfunction, an exact analytic solution to the stationary Schrodinger equation in two dimensions is obtained with the potential V(r) = Ar-4 + Br-3 + Cr-2 + Dr(-1). The restrictions on the parameters of the studied potential and the angular momentum quantum number m are also presented MH - United Kingdom MH - Mexico|Distrito Federal PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0281-1847 UR - ISI:000171747300001 L2 - ANALYTIC CONTINUED FRACTIONS; SINGULAR ANHARMONICITIES; SOLVABLE POTENTIALS; PERTURBATION-THEORY; QUANTUM-MECHANICS; V(R)=AR(2)+BR(-4)+CR(-6); STATES SO - Physica Scripta 2001 ;64(4):273-276 2799 UI - 14001 AU - Dong SH AD - Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, EnglandKansas State Univ, Dept Phys, Manhattan, KS 66506, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Univ Oxford, Phys & Theoret Chem Lab, S Parks Rd, Oxford OX1 3QZ, England TI - A new approach to the relativistic Schrodinger equation with central potential: Ansatz method AB - Applying an ansatz to the eigenfunction, we obtain the exact closed-form solutions of the relativistic Schrodinger equation with the potential V(r) = -a/r + b/r(1/2) both in three dimensions and in two dimensions. The restrictions on the parameters of the given potential and the angular momentum quantum number are also presented MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000167909000008 L2 - ANALYTIC CONTINUED FRACTIONS; QUANTUM-MECHANICS; SINGULAR ANHARMONICITIES; V(R)=AR(2)+BR(-4)+CR(-6) SO - International Journal of Theoretical Physics 2001 ;40(2):559-567 2800 UI - 14002 AU - Dong SH AU - Hou XW AU - Ma ZQ AD - Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R ChinaKansas State Univ, Dept Phys, Manhattan, KS 66506, USAUniv Three Gorges, Dept Phys, Yichang 443000, Peoples R ChinaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Acad Sinica, Inst High Energy Phys, POB 918-4, Beijing 100039, Peoples R China TI - Correlations of spin states for icosahedral double group AB - The irreducible bases of the icosahedral double groups I' acid I-h' are explicitly presented in their respective group spaces. Applying these bases to the spin states \j, mu >, we obtain a simple formula for combining the spin states into the symmetry-adapted bases which belong to a given row of given irreducible representations of I' and I-h' MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000167909000009 L2 - IRREDUCIBLE BASES; POINT GROUPS; ALGEBRAIC EXPRESSIONS; TETRAHEDRAL GROUP SO - International Journal of Theoretical Physics 2001 ;40(2):569-581 2801 UI - 13898 AU - Donis-Hernandez FR AU - Parkhouse RME AU - Santos-Argumedo L AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07360, DF, MexicoGulbenkian Inst Sci, Oeiras, PortugalSantos-Argumedo, L, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Apartado Postal 14-740, Mexico City 07360, DF, Mexico TI - Ontogeny, distribution and function of CD38-expressing B lymphocytes in mice AB - Analysis of expression of CD38, CD45R (B220), IgM and IgD an splenic B lymphocytes from mice of different ages demonstrated CD38 an both immature (B220(+), BCR-) and mature (B220(+), BCR+) B lymphocytes. Similarly, CD38 is expressed as early as B220 on the surface of progenitor B cells in the bone marrow. In spite of expressing of CD38 and IgM, neonatal B cells, in contrast to the adult, failed to proliferate to either anti-CD38 or anti-IgM, crosslinking when IL-4 was present. They did, however, respond to LPS and anti-CD40, and by 2 weeks of age they began to respond to anti-CD38 and anti-IgM, reaching adult B cell levels by 4 weeks. Although the distribution of CD38 on adult B cells from most different lymphoid compartments was broadly similar, significantly higher levels of CD38 were expressed on peritoneal B lymphocytes. A detailed analysis, using IgM/IgD ratio and staining with anti-CD5 confirmed that B1 lymphocytes were expressing a high level of CD38. Interestingly, both immature B cells and peritoneal B1 lymphocytes were unresponsive to anti-CD38. However, they were activated by LPS or anti-CD40 MH - Mexico|Distrito Federal MH - Portugal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Immunology U5 - J;Article AV - English IS - 0014-2980 UR - ISI:000168090100033 L2 - ontogeny;CD38;peritoneal B lymphocyte;proliferation;distribution;CYCLIC ADP-RIBOSE; BRUTON TYROSINE KINASE; CD38 LIGATION; SIGNAL-TRANSDUCTION; T-CELLS; ACTIVATION; EXPRESSION; RESPONSES; RECEPTOR; MOLECULE SO - European Journal of Immunology 2001 ;31(4):1261-1267 2802 UI - 13486 AU - Doss CR AU - Morris ML AD - Yale Univ, Yale Ctr Int & Area Studies, New Haven, CT 06520, USACIMMYT, Econ Program, Mexico City 06600, DF, MexicoDoss, CR, Yale Univ, Yale Ctr Int & Area Studies, POB 208206, New Haven, CT 06520 USA TI - How does gender affect the adoption of agricultural innovations? The case of improved maize technology in Ghana AB - Why do men and women adopt agricultural technologies at different rates? Evidence from Ghana suggests that gender-linked differences in the adoption of modern maize varieties and chemical fertilizer result from gender-linked differences in access to complementary inputs. This finding has important policy implications, because it suggests that ensuring more widespread and equitable adoption of improved technologies may not require changes in the research system, but rather introduction of measures that ensure better access for women to complementary inputs, especially land, labor, and extension services. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000169326400003 L2 - adoption;maize;Ghana;gender SO - Agricultural Economics 2001 ;25(1):27-39 2803 UI - 12017 AU - Downer MC AU - Jiang Y AU - Lim D AU - Mantese L AU - Wilson PT AU - Mendoza BS AU - Gavrilenko VI AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USACtr Invest Opt, Guanajuato, MexicoRudolph Technol Inc, Flanders, NJ 07836, USADowner, MC, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - Optical second harmonic spectroscopy of silicon surfaces, interfaces and nanocrystals AB - We review recent advances in the acquisition and microscopic interpretation of spectroscopic second harmonic data from silicon surfaces, including clean and adsorbate-covered Si(001) in ultra-high vacuum, and the buried Si/SiO2 interfaces of planar and nanocrystalline structures MH - Mexico|Guanajuato MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000173124200019 L2 - SUM-FREQUENCY GENERATION; 2ND-HARMONIC GENERATION; SI(100) SURFACES; SI(001); HYDROGEN; PSEUDOPOTENTIALS; SEMICONDUCTOR; TRANSITIONS; DIFFUSION; SI(111) SO - Physica Status Solidi A-Applied Research 2001 ;188(4):1371-1381 2804 UI - 12570 AU - Downer MC AU - Mendoza BS AU - Gavrilenko VI AD - Univ Texas, Dept Phys, Austin, TX 78712, USACtr Invest Opt, AC Leon, Guanajuato, MexicoRudolph Technol Inc, Flanders, NJ 07836, USADowner, MC, Univ Texas, Dept Phys, Austin, TX 78712, USA TI - Optical second harmonic spectroscopy of semiconductor surfaces: advances in microscopic understanding AB - Even-order non-linear optical spectroscopy has emerged as an unusually sensitive technique for noninvasive analysis of surfaces and buried interfaces of centrosymmetric materials. The forefront challenges are: to develop reliable microscopic computational methods for calculating and interpreting measured surface non-linear spectra; to relate non-linear surface spectra quantitatively to linear optical surf ace probes such as reflectance-difference spectroscopy (RDS); and to develop convenient methods for acquiring nonlinear optical spectra over bandwidths (several electron-volts) that encompass multiple electronic surface resonances. We review recent advances in both calculation and measurement of non-linear spectra, with emphasis on reconstructed and adsorbate-covered silicon surfaces in epitaxial growth environments. Copyright (C) 2001 John Wiley & Sons, Ltd MH - Mexico|Guanajuato MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Physical U5 - J;Review AV - English IS - 0142-2421 UR - ISI:000171690500007 L2 - second harmonic spectroscopy;silicon surfaces;DENSITY-FUNCTIONAL THEORY; SUM-FREQUENCY GENERATION; REFLECTANCE DIFFERENCE SPECTROSCOPY; QUASI-PARTICLE APPROXIMATION; 4TH HARMONIC-GENERATION; CORE-LEVEL SHIFTS; X-RAY-DIFFRACTION; AB-INITIO; LOCAL-FIELD; VICINAL SI(001) SO - Surface and Interface Analysis 2001 ;31(10):966-986 2805 UI - 11993 AU - Doyle RW AU - Perez-Enriquez R AU - Takagi M AU - Taniguchi N AD - Genet Computat Ltd, Halifax, NS B3H 3Y1, CanadaCIBNOR, Lab Genet Acuicola, La Paz 23000, BCS, MexicoNatl Fisheries Univ, Ono Limnol Stn, Yamaguchi 75413, JapanTohoku Univ, Grad Sch AGr Sci, Lab Appl Populat Genet, Sendai, Miyagi 980, JapanDoyle, RW, Genet Computat Ltd, 1031 Beaufort Ave, Halifax, NS B3H 3Y1, Canada TI - Selective recovery of founder genetic diversity in aquacultural broodstocks and captive, endangered fish populations AB - Hatchery broodstocks used for genetic conservation or aquaculture may represent their ancestral gene pools rather poorly. This is especially likely when the fish that found a broodstock are close relatives of each other. We re-analysed microsatellite data from a breeding experiment on red sea bream to demonstrate how lost genetic variation might be recovered when gene frequencies have been distorted by consanguineous founders in a hatchery. A minimal-kinship criterion based on a relatedness estimator was used to select subsets of breeders which represented the maximum number of founder lineages (i.e., carried the fewest identical copies of ancestral genes). UPGMA clustering of Nei's genetic distances grouped these selected subsets with the parental gene pool, rather than with the entire, highly 'drifted' offspring generation. The selected subsets also captured much of the expected heterozygosity and allelic diversity of the parental gene pool. Independent pedigree data on the same fish showed that the selected subsets had more contributing parents and more founder equivalents than random subsets of the same size. The estimated mean coancestry was lower in the selected subsets, meaning that inbreeding in subsequent generations would be lower if they were used as breeders. The procedure appears suitable for reducing the genetic distortion due to consanguineous and over-represented founders of a hatchery gene pool MH - Canada MH - Japan MH - Mexico|Baja California Sur PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6707 UR - ISI:000173270000024 L2 - aquaculture;biodiversity;conservation;extinction;fish;genetic;hatchery;inbreeding;pedigree;INDIVIDUAL INBREEDING COEFFICIENTS; NATURAL-POPULATIONS; CONSERVATION GENETICS; PAIRWISE RELATEDNESS; SIZE; PREDICTION; DNA; STRATEGIES; PROGRAMS; MARKERS SO - Genetica 2001 ;111(1-3):291-304 2806 UI - 12693 AU - Draayer JP AU - Popa G AU - Hirsch JG AD - Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDraayer, JP, Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA TI - E2 and M1 strengths in heavy deformed nuclei AB - Energy levels of the four lowest bands in Dy-160,Dy-162,Dy-164 and Er-168, B(E2) transition strengths between the levels, and the B(Ml) strength distribution of the ground state, all calculated within the framework of pseudo-SU3 model, are presented. Realistic single-particle energies and quadrupole-quadrupole and pairing interaction strengths fixed from systematics were used in the calculations. The strengths of four rotor-like terms, all small relative to the other terms in the interaction, were adjusted to give an overall best fit to the energy spectra. The procedure yielded consistent parameter sets for the four nuclei MH - USA MH - Mexico|Distrito Federal PB - KRAKOW: ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0587-4254 UR - ISI:000171568000044 L2 - SHELL-MODEL; ER-168 SO - Acta Physica Polonica B 2001 ;32(9):2697-2710 2807 UI - 12096 AU - Dreyfus-Leon M AU - Kleiber P AD - PNAAPD, Inst Nacl Pesca, Mexico City, DF, MexicoUABC, Fac Ciencias Marinas, Mexico City, DF, MexicoNatl Marine Fisheries Serv, Hawaii, HI, USADreyfus-Leon, M, PMB-070,POB 189003, Coronado, CA 92178, USA TI - A spatial individual behaviour-based model approach of the yellowfin tuna fishery in the eastern Pacific Ocean AB - A spatial individual-based model of the yellowfin tuna fishery in the eastern Pacific Ocean is presented. Schools of fish and individual fishing vessels are represented with artificial neural networks. These representations are intended to model behaviour decisions of movement in space. Schools of fish search continually for comfort and tuna vessels search for the tuna schools during a fishing trip. Two scenarios are considered: one with no fishing regulation and another with area closure during the last quarter of the year. This model is focused on spatial dynamics of fishing effort. Effort redistribution when regulations are implemented is not well understood and this modelling approach can help fishery managers to envisage some regulation effects in the fishery. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000172947900005 L2 - artificial neural networks;individual based model;yellowfin tuna;fishery;ENVIRONMENT; DYNAMICS; SEARCH; STOCK SO - Ecological Modelling 2001 ;146(1-3):47-56 2808 UI - 12171 AU - Drogobitskiy YV AU - Sanchez AFC AU - de la Cruz GG AU - Gurevich YG AU - Logvinov GN AD - Ternopil Pedag State Univ, Dept Phys, Ternopol, UkraineInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoDrogobitskiy, YV, Ternopil Pedag State Univ, Dept Phys, 2 Krivonosa,PO 282009, Ternopol, Ukraine TI - Pulse thermodiffusive processes in semiconductors AB - A one-dimensional problem for the determination of transient electron and phonon temperatures in bounded semiconductors is solved analytically and an exact expression is obtained. The model includes the heating of one of the surfaces of the sample by a rectangular thermal pulse of an arbitrary duration, separate electron and phonon heat boundary conditions, and electron-phonon energy interaction. The characteristic times of the transient processes are introduced through the electron and phonon thermal diffusion time, tau (e,p), and electron-phonon energy relaxation time, tau (epsilon). For nondegenerate semiconductors, the electron subsystem is described by the essentially nonequilibrium temperature whereas the phonon temperature is equal to the ambient equilibrium temperature. The heat diffusion process is characterised by parameter tau (e) in the case of a thin sample as compared with the electron cooling length, while time tau (epsilon) becomes the characteristic relaxation parameter for long samples. The thermoelectric response is obtained and the analysis is made for the long and short heat pulses MH - Mexico|Distrito Federal MH - Ukraine PB - LONDON: PION LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Mechanics;Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0018-1544 UR - ISI:000172756900006 L2 - ELECTRON SO - High Temperatures-High Pressures 2001 ;33(6):677-683 2809 UI - 14565 AU - Drucker AG AU - Gomez V AU - Anderson S AD - Int Livestock Res Inst, Addis Ababa, EthiopiaUniv Autonoma Yucatan, FMVZ, Merida 97100, Yucatan, MexicoImperial Coll Wye, Ashford TN25 5AH, Kent, EnglandDrucker, AG, Int Livestock Res Inst, POB 5689, Addis Ababa, Ethiopia TI - The economic valuation of farm animal genetic resources: a survey of available methods AB - Genetic erosion of domestic animal diversity has placed 30% of the world's breeds at risk of extinction, often as a result of government policy/programmes. Conservation and sustainable development of animal genetic resources (AnGR) require a broad focus that includes the many 'adaptive' breeds that survive well in the low external input agriculture typical of developing countries. Environmental economic valuation methodologies have an important role to play in supporting decisions regarding which breeds should be conserved and how this should be done. However, AnGR, in general, and valuation methods in particular, have received very little attention. This paper provides a survey of the methods available for the valuation of AnGR and the steps that must be taken in order to test some of the more promising methodologies in practice. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Ethiopia MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Ecology;Economics;Environmental Sciences;Environmental Studies U5 - J;Article NT - DUPLICATE AV - English IS - 0921-8009 UR - ISI:000166221500001 L2 - animal genetic resources;biodiversity;economic valuation;conservation policy;CONSERVATION; DIVERSITY; LIVESTOCK; BREEDS SO - Ecological Economics 2001 ;36(1):1-18 2810 UI - 9980 AU - Duarte-Mermoud MA AU - Castro-Linares R AU - Castillo-Facuse A AD - Univ Chile, Dept Elect Engn, Santiago, ChileIPN, CINVESTAV, Dept Elect Engn, Mexico City 07300, DF, MexicoDuarte-Mermoud, MA, Univ Chile, Dept Elect Engn, Av Tupper 2007,Casilla 412-3, Santiago, Chile TI - Adaptive passivity of nonlinear systems using time-varying gains AB - In this paper, an adaptive controller with time-varying gains is proposed to solve the problem of making a single-input single-output (SISO) nonlinear system, with explicit linear parametric uncertainty, equivalent to a passive system. Some stability issues associated to the resultant closed-loop passive system are also discussed. The results obtained are applied to two examples, a third order nonlinear system and a model of a magnetic levitation system, to show the controller methodology design MH - Chile MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems;Engineering, Mechanical U5 - J;Article AV - English IS - 0925-4668 UR - ISI:000178815300002 L2 - nonlinear control;adaptive control;feedback passive systems;stabilization;GLOBAL STABILIZATION; FEEDBACK SO - Dynamics and Control 2001 ;11(4):333-351 2811 UI - 12783 AU - Duarte-Vazquez MA AU - Garcia-Almendarez BE AU - Regalado C AU - Whitaker JR AD - Univ Autonoma Queretaro, Dept Invest & Posgrado Alimentos, PROPAC, Fac Quim, Queretaro 76010, MexicoUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USARegalado, C, Univ Autonoma Queretaro, Dept Invest & Posgrado Alimentos, PROPAC, Fac Quim, CU Cerro Las Campanas, Queretaro 76010, Mexico TI - Purification and properties of a neutral peroxidase isozyme from turnip (Brassica napus L. var. purple top white globe) roots AB - A neutral peroxidase isozyme (pI 7.2) from turnip roots (TNP) was purified to homogeneity and partially characterized. TNP is a monomeric glycoprotein with 9.1% carbohydrate content and a molecular weight of 36 kDa. Optimum pH values for activity using 2,2 ' -azinobis(3-ethylbenzthiazoline-6-sulfonic acid (ABTS) and guaiacol as H donors were 4.5 and 5.5, whereas the K-m values were 0.7 and 3.7 mM, respectively. The ABTS K-m was similar to7 times higher than that reported for basic commercial horseradish peroxidase (HRP-C). TNP retained similar to 70% activity after 11 min of heating at 65 degreesC, whereas the activation energy for inactivation (132 kJ/mol) was higher than or comparable to that of other peroxidases. The low ABTS K-m and high specific activity (1930 units/mg) gave a high catalytic efficiency (500 M-1 s(-1)). These properties make TNP an enzyme with a high potential as an alternative to HRP in various applications MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000171214900052 L2 - neutral peroxidase;turnip roots;protein purification;CELL-SUSPENSION CULTURES; ANIONIC PEROXIDASE; HORSERADISH-PEROXIDASE; GLYCINE-MAX; RADISH ROOT; SEED COAT; ISOPEROXIDASES; INACTIVATION; ISOENZYME; FRUIT SO - Journal of Agricultural and Food Chemistry 2001 ;49(9):4450-4456 2812 UI - 13133 AU - Duarte C AU - Ruperto N AU - Goycochea M AU - Maldonado R AU - Beristain R AU - De Inocencio J AU - Burgos-Vargas R AD - Hosp Gen Mexico City, Rheumatol Unit, Mexico City 06726, DF, MexicoIRCCS S Matteo, Lab Informat Med, Pavia, ItalyHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoCS Estrecho de Corea, Madrid, SpainDuarte, C, Hosp Gen Mexico City, Rheumatol Unit, Dr Balmis 148, Mexico City 06726, DF, Mexico TI - The Mexican version of the Childhood Health Assessment Questionnaire (CHAQ) and the Child Health Questionnaire (CHQ) AB - We report herein the results of the cross-cultural adaptation and validation into the Mexican language of the parents version of two health related quality, of life instruments. The Childhood Health Assessment Questionnaire (CHAQ) is a disease specific health instrument that measures functional ability, in daily living activities in children with juvenile idiopathic arthritis (RA). The Child Health Questionnaire (CHQ) is a generic health instrument designed to capture the physical and psychosocial well-being of children independently from the underlying disease. The Mexican CHAQ was already published and therefore it was revalidated while the Mexican CHQ was derived from the European Spanish version with changing of the few words whose use is different in the 2 countries. A total of 182 subjects were enrolled: 89 patients with RA (26% systemic onset, 47% polyarticular onset, 13.5% extended oligoarticular subtype, and 13.5% persistent oligoarticular subtype) and 93 healthy, children. The CHAQ clinically discriminated between healthy subjects and RA patients, with the systemic onset, and polyarticular onset subtypes having a higher degree of disability. pain, and a lower overall well-being when compared to their healthy peers. Also the CHQ clinically, discriminated between healthy subjects and RA patients, with the systemic onset, and polyarticular onset having a lower physical and psychosocial well-being when compared to their healthy peers. In conclusion the Mexican version of the CHAQ-CHQ is a reliable, and valid tool for the functional, physical and psychosocial assessment of children with JIA MH - Italy MH - Mexico|Distrito Federal MH - Spain PB - PISA: CLINICAL & EXPER RHEUMATOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Article AV - English IS - 0392-856X UR - ISI:000170313500022 L2 - Mexican Childhood Health Assessment Questionnaire (CHAQ);Mexican Child Health Questionnaire (CHQ);cross cultural adaptation and psychometric evaluation;health related quality of life;juvenile idiopathic arthritis (JIA);healthy children;ARTHRITIS SO - Clinical and Experimental Rheumatology 2001 ;19(4):S106-S110 2813 UI - 12274 AU - Dubrovsky JG AU - Rost TL AU - Colon-Carmona A AU - Doerner P AD - La Paz BCS, CIBNOR, Mexico City, DF, MexicoUniv Calif Davis, Div Biol Sci, Plant Biol Sect, Davis, CA 95616, USASalk Inst Biol Studies, Plant Biol Lab, San Diego, CA 92186, USAUniv Edinburgh, Inst Cell & Mol Biol, Edinburgh EH9 3JR, Midlothian, ScotlandDubrovsky, JG, La Paz BCS, CIBNOR, AP 128, Mexico City, DF, Mexico TI - Early primordium morphogenesis during lateral root initiation in Arabidopsis thaliana AB - The first morphogenetic events of lateral root primordium (LRP) formation in the Arabidopsis thaliana (L.) Heynh. pericycle occur soon after cells of the primary root complete elongation. Pericycle cells in direct contact with underlying protoxylem cells participate in LRP formation. Two types of LRP initiation were found. longitudinal uni- and bi-cellular. These occur when a single or two pericycle cells within a file. respectively. become founder cells for the entire longitudinal extent of the LRP. Histochemical and cytological analysis suggests that three is the minimum number of cells required to initiate an LRP. In young primordia comprising less than 32 cells, the average cell-doubling time was 3.7 h. indicating a drastic acceleration of cell cycle progression after lateral root initiation. Early in LRP development, cell growth is limited and therefore cytokinesis leads to a reduction of cell volume, similar to cleavage division cycles during animal and plant embryogenesis . The striking coordination of proliferation between pericycle cells in adjacent riles in direct contact with the underlying protoxylem implies that intercellular signaling mechanisms act in the root apical meristem or later in development MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0935 UR - ISI:000172460900004 L2 - arabidopsis (root initiation);development;cell cycle;lateral root initiation;meristem;pericycle;ASYMMETRICAL TRANSVERSE DIVISIONS; PERICYCLE CELLS; LINEAGE; CYCLIN; PLANTS SO - Planta 2001 ;214(1):30-36 2814 UI - 13725 AU - Duda Y AU - Lee LL AU - Kalyuzhnyi Y AU - Chapman WG AU - Ting PD AD - Univ Oklahoma, Sch Chem Engn & Mat Sci, Norman, OK 73019, USAInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoInst Condensed Matter Phys, Lvov, UkraineRice Univ, Dept Chem Engn, Houston, TX 77005, USALee, LL, Univ Oklahoma, Sch Chem Engn & Mat Sci, Norman, OK 73019, USA TI - Structure and bridge functions of fused-sphere dimeric fluids AB - We carry out Monte Carlo (MC) simulation as well as solution of the Chandler-Silbey-Ladanyi (CSL) equations with self-consistent (SC) closures for symmetric hard dumbbells of bond lengths L = 0.1, 0.4, 0.8, and 1.0. The integral equations with the new closures give highly accurate and consistent structures and properties. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Ukraine MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000168592000014 L2 - DIRECTIONAL ATTRACTIVE FORCES; INTEGRAL-EQUATION THEORY; MOLECULAR FLUIDS; HARD-SPHERES; SIMULATION; CONSISTENT; MIXTURES; THERMODYNAMICS SO - Chemical Physics Letters 2001 ;339(1-2):89-95 2815 UI - 13803 AU - Duda Y AU - Lee LL AU - Kalyuzhnyi Y AU - Chapman WG AU - Ting PD AD - Univ Oklahoma, Sch Chem Engn & Mat Sci, Norman, OK 73019, USAInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoInst Condensed Matter, Lviv, UkraineRice Univ, Dept Chem Engn, Houston, TX 77005, USALee, LL, Univ Oklahoma, Sch Chem Engn & Mat Sci, Norman, OK 73019, USA TI - Structures of fused-dimer fluids: A new closure based on the potential distribution theorems AB - We carry out Monte Carlo (MC) simulation as well as solution of the Chandler-Silbey-Ladanyi (CSL) equations with self-consistent closures for symmetric hard dumbbells with bond lengths L = 0.1, 0.4, 0.6, 0.8, and 1.0. The consistency conditions include the zero-separation theorems, the pressure consistency (P-v = P-c), and the overlap conditions. Conventional closures, such as the Percus-Yevick closure, give the wrong sign (negative values) for the unbonded bridge function B-00(r) for small bond lengths L < 0.8; the MC-determined behavior of B-00(r) being >0. This explains the failure of the common liquid state closures for chain molecules. The CSL is solved with a set of new closures. The new closure forms are flexible, and are required to satisfy the consistencies imposed. The results are at the same time consistent and highly accurate. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000168440400031 L2 - DIRECTIONAL ATTRACTIVE FORCES; INTEGRAL-EQUATION THEORY; LENNARD-JONES FLUID; BRIDGE FUNCTION; SPHERE FLUID; MOLECULAR FLUIDS; HARD-SPHERES; MIXTURES; SIMULATION; CONSISTENT SO - Journal of Chemical Physics 2001 ;114(19):8484-8491 2816 UI - 13923 AU - Duncan BC AU - Sanchez-Villicana V AU - Gould PL AU - Sadeghpour HR AD - Univ Connecticut, Dept Phys, Storrs, CT 06269, USAHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USAInst Astrofis Opt & Elect, Puebla 72840, MexicoDuncan, BC, Univ Connecticut, Dept Phys, U-3046, Storrs, CT 06269, USA TI - Measurement of the Rb(5D(5/2)) photoionization cross section using trapped atoms AB - We report on measurements of the cross section for photoionization of Rb atoms in the highly excited 5D(5/2) level at wavelengths ranging from 1064 to 532 nm (photoelectron energies of 0.175 to 1.33 eV). We efficiently populate the 5D(5/2) level using coherent two-photon excitation of trapped atoms with pulses in the counterintuitive order. The absolute photoionization cross sections are then measured via the increased loss of atoms from the magneto-optical trap when it is illuminated by the photoionizing light. Out results are in good agreement with new calculations based on the valence-electron parametric potential method MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000168095300084 L2 - DIODE-LASER SYSTEM; ALKALI ATOMS; MAGNETOOPTICAL TRAP; EXCITED-STATES; VAPOR CELL; RB; CESIUM; CS SO - Physical Review A 2001 ;6304(4): 2817 UI - 12347 AU - Dunn MF AU - Araiza G AU - Finan TM AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Ingn Metab, Cuernavaca 62191, Morelos, MexicoMcMaster Univ, Dept Biol, Hamilton, ON, CanadaDunn, MF, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Ingn Metab, Apartado Postal 565-A, Cuernavaca 62191, Morelos, Mexico TI - Cloning and characterization of the pyruvate carboxylase from Sinorhizobium meliloti Rm1021 AB - The gene encoding pyruvate carboxylase (pyc) was isolated from a Sinorhizobium meliloti Rm1021 cosmid bank by complementation of a Rhizobium tropici pyc mutant. PYC-negative mutants of S. meliloti Rm1021 were isolated by transposon mutagenesis and were unable to grow with glucose or pyruvate as sole carbon sources, but were symbiotically competent in combination with alfalfa plants. PYC activity assays, pyc::lacZ gene fusion studies and an in vivo biotinylation assay showed that PYC activity in S. meliloti was dependent mainly on biotin availability and not on changes in gene transcription. The subunit and holo-enzyme molecular masses of the S. meliloti PYC indicated that the enzyme was an alpha (4) homotetramer. The S. meliloti PYC had a high apparent Ka (0.23 mM) for the allosteric activator acetyl-CoA and was product-inhibited by sub-millimolar concentrations of oxaloacetate. In contrast to other bacterial alpha (4)-PYCS which have been characterized, the S. meliloti enzyme was not strongly inhibited by L-aspartate MH - Canada MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000172348300006 L2 - pyruvate carboxylase;anaplerotic reactions;carbon metabolism;rhizobia;Sinorhizobium meliloti;biotin;RHIZOBIUM-MELILOTI; CORYNEBACTERIUM-GLUTAMICUM; NUCLEOTIDE-SEQUENCE; MALIC ENZYME; GENE; MUTANTS; PHOSPHOENOLPYRUVATE; METABOLISM; ETLI; CONSTRUCTION SO - Archives of Microbiology 2001 ;176(5):355-363 2818 UI - 12446 AU - Dupont HL AU - Jiang ZD AU - Ericsson CD AU - Adachi JA AU - Mathewson JJ AU - Dupont MW AU - Palazzini E AU - Riopel LM AU - Ashley D AU - Martinez-Sandoval F AD - St Lukes Episcopal Hosp, Houston, TX 77030, USAUniv Texas, Sch Publ Hlth, Ctr Infect Dis, Houston, TX, USAUniv Texas, Sch Med, Houston, TX, USABaylor Coll Med, Houston, TX 77030, USASalix Pharmaceut, Palo Alto, CA, USAAlfa Wassermann SpA, Bologna, ItalyMinist Hlth Jamaica, Montego Bay, JamaicaUniv Autonoma Guadalajara, Guadalajara, Jalisco, MexicoDuPont, HL, St Lukes Episcopal Hosp, 6720 Bertner Ave,MC 1-164, Houston, TX 77030 USA TI - Rifaximin versus ciprofloxacin for the treatment of traveler's diarrhea: A randomized, double-blind clinical trial AB - Rifaximin is a poorly absorbed rifamycin derivative under investigation for treatment of infectious diarrhea. Adult students from the United States in Mexico and international tourists in Jamaica were randomized to receive either rifaximin (400 mg twice per day) or ciprofloxacin (500 mg twice per day) for 3 days, following a double-blinded model, from June 1997 to September 1998. A total of 187 subjects with diarrhea were studied. Time from initiation of therapy to passage of last unformed stool was comparable for those receiving rifaximin or ciprofloxacin (median, 25.7 hours versus 25.0 hours, respectively). There was no significant difference in the proportion of subjects in the 2 groups with respect to clinical improvement during the first 24 hours (P=.199), failure to respond to treatment (P=.411), or microbiological cure (P=.222). The incidence of adverse events was low and similar in each group. Rifaximin is a safe and effective alternative to ciprofloxacin in the treatment of traveler's diarrhea MH - Italy MH - Jamaica MH - Mexico|Jalisco MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 55 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000171998800002 L2 - TOXIGENIC ESCHERICHIA-COLI; THERAPY; RESISTANCE; RIFAMYCIN SO - Clinical Infectious Diseases 2001 ;33(11):1807-1815 2819 UI - 12330 AU - Duran-Valencia C AU - Valtz A AU - Galicia-Luna LA AU - Richon D AD - Ecole Natl Super Mines Paris CEREP TEP, Ctr Reacteurs & Processus, F-77305 Fontainebleau, FranceUPALM, Lab Termodinam Grad ESIQIE, IPN, Mexico City 07738, DF, MexicoDuran-Valencia, C, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Isothermal vapor-liquid equilibria of the carbon dioxide (CO2)-N,N-dimethylformamide (DMF) system at temperatures from 293.95 K to 338.05 K and pressures up to 12 MPa AB - Vapor-liquid equilibrium data are presented for the binary system carbon dioxide -N,N-dimethylformamide at 293.95, 313.05, and 338.05 K and pressures up to 12 MPa. The data are correlated using the Peng-Robinson equation of state with Wong-Sandler mixing rules. Agreement between the calculated and the measured equilibrium data has been found within 0.03% for vapor mole fractions and within 0.6% for pressures MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000172243900047 L2 - STATE SO - Journal of Chemical and Engineering Data 2001 ;46(6):1589-1592 2820 UI - 12141 AU - Durand M AU - Cravioto MD AU - Raymond EG AU - Duran-Sanchez O AU - Cruz-Hinojosa MD AU - Castell-Rodriguez A AU - Schiavon R AU - Larrea F AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, MexicoFamily Hlth Int, Res Triangle Pk, NC 27709, USAUniv Nacl Autonoma Mexico, Dept Cellular Biol, Sch Med, Mexico City 04510, DF, MexicoInst Nacl Pediat, Reprod Hlth Serv, Mexico City, DF, MexicoLarrea, F, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, Mexico TI - On the mechanisms of action of short-term levonorgestrel administration in emergency contraception AB - The effects of short-term administration of levonorgestrel (LNG) at different stages of the ovarian cycle on the pituitary-ovarian axis, corpus luteum function, and endometrium were investigated. Forty-five surgically sterilized women were studied during two menstrual cycles. In the second cycle, each women received two doses of 0.75 mg LNG taken 12 h apart on day 10 of the cycle (Group A), at the time of serum luteinizing hormone (LH) surge (Group B), 48 h after positive detection of urinary LH (Group C), or late follicular phase (Group D). In both cycles, transvaginal ultrasound and serum LH were performed from the detection of urinary LH until ovulation. Serum estradiol (E-2) and progesterone (P-4) were measured during the complete luteal phase. In addition, an endometrial biopsy was taken at day LH + 9. Eighty percent of participants in Group A were anovulatory, the remaining (three participants) presented significant shortness of the luteal phase with notably lower luteal P-4 Serum concentrations. In Groups B and C, no significant differences on either cycle length or luteal P-4 and E-2 serum concentrations were observed between the untreated and treated cycles. Participants in Group D had normal cycle length but significantly lower luteal P-4 serum concentrations. Endometrial histology was normal in all ovulatory-treated cycles. It is suggested that interference of LNG with the mechanisms initiating the LH preovulatory surge depends on the stage of follicle development. Thus, anovulation results from disrupting the normal development and/or the hormonal activity of the growing follicle only when LNG is given preovulatory. In addition, peri- and post-ovulatory administration of LNG did not impair corpus luteum function or endometrial morphology. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 49 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000172934100004 L2 - corpus luteum;emergency contraception;levonorgestrel;mechanism of action;ovulation;progestins;POST-COITAL CONTRACEPTION; RAT GRANULOSA-CELLS; LUTEINIZING-HORMONE; ENDOMETRIAL RECEPTIVITY; ETHINYLESTRADIOL COMBINATION; POSTCOITAL CONTRACEPTION; AROMATASE-ACTIVITY; MENSTRUAL CYCLES; OVARIAN-FUNCTION; YUZPE REGIMEN SO - Contraception 2001 ;64(4):227-234 2821 UI - 11292 AU - Durazo R AU - Baumgartner TR AU - Bograd SJ AU - Collins CA AU - De La Campa S AU - Garcia J AU - Gaxiola-Castro G AU - Huyer A AU - Hyrenbach KD AU - Loya D AU - Lynn RJ AU - Schwing FB AU - Smith RL AU - Sydeman WJ AU - Wheeler P AD - USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943, USADurazo, R, Univ Autonoma Baja California, Fac Ciencias Marinas, Apartado Postal 453, Ensenada, Baja California, Mexico TI - The state of the California Current, 2000-2001: A third straight La Nina year AB - This report is the eighth in a series that describe recent oceanographic observations within the California Current system, from Oregon to Baja California. The emphasis here is placed on the observations conducted concurrently by the CalCOFI (California Cooperative Oceanic Fisheries Investigations), IMECOCAL (Investigaciones Mexicanas de la COrriente de CALifornia), and GLOBEC-LTOP (GLOBal Ecosystems Long-Term Observation Program) programs from April 2000 to January 2001. The large-scale oceanic and atmospheric conditions over the tropical Pacific indicated a third straight La Nina year. Coastal conditions exhibited weaker than normal upwelling off northern Baja California and southern California through 2000 and early 2001. Measurements off Oregon, southern California, and Baja California denoted oceanographic conditions near the climatological norm. Likewise, zooplankton biomass decreased from the high levels observed in 1999 to nearly normal values, while cold-water species of seabirds did not increase off southern California. A return to more normal levels of the monitored features of the CCS does not yet support the idea of a climate regime shift MH - Mexico|Baja California MH - USA PB - LA JOLLA: SCRIPPS INST OCEANOGRAPHY RP - NOT IN FILE U3 - TC 21 U4 - Fisheries U5 - J;Article AV - English IS - 0575-3317 UR - ISI:000175216400005 L2 - EL-NINO; CURRENT SYSTEM; CLIMATE; CIRCULATION; TRANSITION; VARIABILITY; OSCILLATION; SOUTHERN; SEABIRDS; REGIME SO - California Cooperative Oceanic Fisheries Investigations Reports 2001 ;42():29-60 2822 UI - 14181 AU - Durdevich M AU - Makaruk HE AU - Owczarek R AD - Univ Nacl Autonoma Mexico, Inst Matemat, Area Invest Cient, Mexico City 04510, DF, MexicoUniv Calif Los Alamos Natl Lab, Los Alamos, NM 87545, USADurdevich, M, Univ Nacl Autonoma Mexico, Inst Matemat, Area Invest Cient, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Generalized noiseless quantum codes utilizing quantum enveloping algebras AB - A generalization of the results of Rasetti and Zanardi concerning avoiding errors in quantum computers by using states preserved by evolution is presented. The concept of dynamical symmetry is generalized from the level of classical Lie algebras and groups, to the level of a dynamical symmetry based on quantum Lie algebras and quantum groups (in the sense of Woronowicz). An intrinsic dependence of the concept of dynamical symmetry on the differential calculus (which holds also in the classical case) is stressed. A natural connection between quantum states invariant under a quantum group action, and quantum states preserved by the dynamical evolution, is discussed MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000167346000015 L2 - COMPACT MATRIX PSEUDOGROUPS; ERROR-CORRECTING CODES; DIFFERENTIAL-CALCULUS; PRINCIPAL BUNDLES; GEOMETRY; PHYSICS; SPHERES SO - Journal of Physics A-Mathematical and General 2001 ;34(7):1423-1437 2823 UI - 14400 AU - Duron S AU - Rivera-Noriega R AU - Poillerat G AU - Solorza-Feria O AD - IPN, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoUniv Strasbourg 1, Lab Electrochim & Chim Corps Solide, F-67008 Strasbourg, FranceSolorza-Feria, O, IPN, CINVESTAV, Dept Quim, A Postal 14-740, Mexico City 07000, DF, Mexico TI - Kinetic study of oxygen electro-reduction on RuxSy(CO)(n) based catalyst in 0.5 M H2SO4 AB - The kinetics of molecular oxygen reduction was examined on a novel Ruthenium-sulfur carbonyl cluster electrocatalyst, synthesized by pyrolysis at 300 degreesC. The experiments were performed by steady stale measurements in a rotating-ring-disc-electrode(RRDE) in 0.5 M H2SO4 at 25 degreesC. For this study the electrocatalyst was supported on carbon paste. It was found that a maximum of 5.5% of hydrogen peroxide is formed at c.a. 0.3 V vs. NHE. This means that O-2 is mainly reduced to water by a four electron pathway. At least three zones of different mechanism could be detected for the O-2 reduction on Ru(x)Sy(CO)(n). In a first zone (0.67-0.35 V) all the three principal reactions of the Damjanovic's model [1] with k(3) greater than or equal to k(2) occur. In the 0.33-0.20 V zone an H2O2 accumulation is observed, k(2) > k(3), and the reaction intermediate is well detected in the ring electrode. In the more cathodic region (0.31-0.03V) a new zone of occurrence of the three main reactions appears and the small peroxide quantities are slowly reduced to water In all the three zones k(1) > k(2). MH - France MH - Mexico|Distrito Federal PB - MONTREAL: ECOLE POLYTECHNIQUE MONTREAL RP - NOT IN FILE U3 - TC 11 U4 - Electrochemistry;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1480-2422 UR - ISI:000166681200005 L2 - electrocatalysis;O-2 reduction;ruthenium-based electrocatalyst;TRANSITION-METAL SULFIDES; RING-DISK ELECTRODES; ALKALINE-SOLUTION; RUTHENIUM SO - Journal of New Materials for Electrochemical Systems 2001 ;4(1):17-23 2824 UI - 13678 AU - Duursma IM AU - Renteria C AU - Tapia-Recillas H AD - Univ Illinois, Dept Math, Urbana, IL 61801, USAInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07300, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoDuursma, IM, Univ Illinois, Dept Math, 1409 W Green St, Urbana, IL 61801 USA TI - Reed-Muller codes on complete intersections AB - By using results and techniques from commutative algebra such as the vanishing ideal of a set of points, its a-invariant, the Hilbert polynomial and series, as well as finite free resolutions and the canonical module, some results about Reed-Muller codes defined on a zero-dimensional complete intersection in the n-projective dimensional space are given. Several examples of this class of codes are presented in order to illustrate the ideas MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0938-1279 UR - ISI:000168842000003 L2 - complete intersection;Reed-Muller code;Hilbert polynomial;vanishing ideal;a-invariant of an ideal;graded finite free resolution;canonical module;IDEAL SO - Applicable Algebra in Engineering Communication and Computing 2001 ;11(6):455-462 2825 UI - 8800 AU - Ebbert MA AU - Jeffers DP AU - Harrison NA AU - Nault LR AD - Miami Univ, Dept Zool, Oxford, OH 45056, USAInt Maize & Wheat Improvement Ctr, Maize Program, El Batan, DF, MexicoUniv Florida, Ft Lauderdale Res & Educ Ctr, Ft Lauderdale, FL 33314, USAOhio State Univ, Ohio Agr Res & Dev Ctr, Dept Entomol, Wooster, OH 44691, USAEbbert, MA, Miami Univ, Dept Zool, Oxford, OH 45056, USA TI - Lack of specificity in the interaction between two maize stunting pathogens and field collected Dalbulus leafhoppers AB - We tested hypotheses concerning the specificity of interactions between insect vectors and mollicute plant pathogens in a 22-month study of leafhoppers collected at three agricultural field sites in Mexico. The common species collected, Dalbulus maidis, D. elimatus, D. gelbus, and D. guevari were equally likely to test positive for corn stunt spiroplasma (CSS) in ELISA, and to transmit maize bushy stunt phytoplasma (MBSP) to test maize seedlings. We documented intraspecific variation in the ability of D. maidis to transmit confirmed CSS infections. Dalbulus guevari and D. gelbus were less successful in transmitting CSS than D. maidis from the same population. Our results suggest this vector-plant pathogen interaction is not specific to a single Dalbulus-mollicute combination, and that both the range of potential vectors in agricultural fields, and intraspecific variation across populations of these vectors, should be the focus of future work MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0013-8703 UR - ISI:000173380700007 L2 - vector specificity;plant pathogens;mollicute;Homoptera;Spiroplasma kunkelii;maize bushy stunt phytoplasma;corn stunt spiroplasma;BUSHY STUNT; CORN STUNT; VECTORS; CICADELLIDAE; SPIROPLASMA; HOMOPTERA; MOLLICUTES; DISEASE; MEXICO; HOST SO - Entomologia Experimentalis et Applicata 2001 ;101(1):49-57 2826 UI - 13006 AU - Echeverria JC AU - Crowe JA AU - Woolfson MS AU - Hayes-Gill BR AD - Univ Nottingham, Sch Elect & Elect Engn, Nottingham, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Elect Engn, Mexico City 09340, DF, MexicoEcheverria, JC, Univ Nottingham, Sch Elect & Elect Engn, Nottingham, England TI - Application of empirical mode decomposition to heart rate variability analysis AB - The analysis of heart rate variability, involving changes in the autonomic modulation conditions, demands specific capabilities not provided by either parametric or non-parametric spectral estimation methods. Moreover, these methods produce time-averaged power estimates over the entire length of the record. Recently, empirical mode decomposition and the associated Hilbert spectra have been proposed for non-linear and non-stationary time series. The application of these techniques to real and simulated short-term heart rate variability data under stationary and non-stationary conditions is presented. The results demonstrate the ability of empirical mode decomposition to isolate the two main components of one chirp series and three signals simulated by the integral pulse frequency modulation model, and consistently to isolate at least four main components localised in the autonomic bands of 14 real signals under controlled breathing manoeuvres. In addition, within the short time-frequency range that is recognised for heart rate variability phenomena, the Hilbert amplitude component ratio and the instantaneous frequency representation are assessed for their suitability and accuracy in time-tracking changes in amplitude and frequency in the presence of non-stationary and non-linear conditions, The frequency tracking error is found to be less than 0.22% for two simulated signals and one chirp series MH - United Kingdom MH - Mexico|Distrito Federal PB - HERTS: PETER PEREGRINUS LTD RP - NOT IN FILE U3 - TC 16 U4 - Computer Science, Interdisciplinary Applications;Engineering, Biomedical;Mathematical & Computational Biology;Medical Informatics U5 - J;Article AV - English IS - 0140-0118 UR - ISI:000170550800010 L2 - heart rate variability;empirical mode decomposition;Hilbert transform;non-linearity;non-stationarity;FREQUENCY-MODULATION MODEL; AUTONOMIC INTEGRATION; SPECTRAL-ANALYSIS; ALGORITHMS; SIGNAL; SERIES; DOMAIN SO - Medical & Biological Engineering & Computing 2001 ;39(4):471-479 2827 UI - 12880 AU - Eckhardt CL AU - Rivera J AU - Adair LS AU - Martorell R AD - Univ N Carolina, Dept Nutr, Chapel Hill, NC 27599, USANatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoEmory Univ, Dept Int Hlth, Rollins Sch Publ Hlth, Atlanta, GA 30322, USAEckhardt, CL, Univ N Carolina, Dept Nutr, Chapel Hill, NC 27599, USA TI - Full breast-feeding for at least four months has differential effects on growth before and after six months of age among children in a Mexican community AB - This study examines the relationship between breast-feeding and growth from 0 to 6 and 6 to 20 mo among 185 children in a Mexican community. Infants from a previous 6-mo longitudinal study were followed up for additional anthropometric measurements at a mean age of 19.9 mo. Size at 6 mo and at follow-up were modeled as outcomes of whether infants were fully breast-fed (exclusively or predominantly breast-fed) for at least 4 mo, controlling for size at birth and 6 mo, respectively, and potential confounders. From birth to 6 mo, fully breast-fed infants had ponderal index increments of 0.07 units larger (P = 0.04) than comparison infants. There were no differences in weight. For length, an interaction between full breast-feeding and socioeconomic status (SES) was found, with fully breast-fed infants of low SES growing more than comparison infants, whereas the opposite was seen at upper SES levels. From 6 to 20 mo, fully breast-fed infants had weight and length increments of 0.53 cm (P < 0.001) and 0.72 kg (P = 0.01) smaller than those of comparison infants. For ponderal index, an interaction between mother's education and breast-feeding revealed an inverted U-shaped response across levels of education. Additionally, logistic regressions of monthly breast-feeding on lagged measurements revealed that relatively heavier infants had higher odds of being fully breast-fed at 2 and 3 mo. Our findings indicate that the benefits of full breast-feeding on growth may be most pronounced early in life. Further research of unmeasured confounders may explain the association of full breast-feeding with slower growth beyond 6 mo MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 6 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000170921000014 L2 - breast-feeding;growth;Mexico;infant feeding;FED INFANTS; PHILIPPINES; PATTERNS; US SO - Journal of Nutrition 2001 ;131(9):2304-2309 2828 UI - 12993 AU - Edwards TM AU - Bunce EJ AU - Cowley SWH AD - Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCowley, SWH, Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England TI - A note on the vector potential of Connerney et al.'s model of the equatorial current sheet in Jupiter's magnetosphere AB - We derive approximate analytic forms for the vector potential of the model jovian equatorial current sheet proposed by Connerney et al. (J. Geophys. Res. 86 (1981) 8370.) and compare them with numerical values derived from exact integral expressions. The vector potential is of great utility in mapping magnetic field lines in the axisymmetric approximation, in deriving model magnetic field components which are guaranteed to be divergence-free at each order of approximation, and in generalising the model to non-planar current sheet configurations. Two approximations are derived, valid for radial distances which are small and large compared with the distance of the inner edge of the model current sheet, respectively. These analytic forms are shown to provide excellent approximations within their respective regimes of validity, and are employed to generate field line maps via contours of the flux function. Corresponding divergence-free magnetic field components are also derived and compared with numerical values, and with the approximate forms suggested by Connerney et al. (1981). (C) 2001 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000170628900006 L2 - HUBBLE-SPACE-TELESCOPE; JOVIAN-MAGNETOSPHERE; MAGNETIC-FIELD; ULYSSES OBSERVATIONS; INNER MAGNETOSPHERE; PLASMA FLOWS; AURORA; FOOTPRINT; EMISSION SO - Planetary and Space Science 2001 ;49(10-11):1115-1123 2829 UI - 13831 AU - Eichhorn SJ AU - Baillie CA AU - Zafeiropoulos N AU - Mwaikambo LY AU - Ansell MP AU - Dufresne A AU - Entwistle KM AU - Herrera-Franco PJ AU - Escamilla GC AU - Groom L AU - Hughes M AU - Hill C AU - Rials TG AU - Wild PM AD - Univ Manchester, Inst Sci & Technol, Ctr Mat Sci, Manchester M1 7HS, Lancs, EnglandUniv London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, EnglandUniv Bath, Dept Engn & Appl Sci, Bath BA2 7AY, Avon, EnglandUniv Grenoble 1, CNRS, CERMAV, Ctr Rech Macromol Vegetales, F-38041 Grenoble 9, FranceCtr Invest Cient Yucatan, Merida 97200, Yucatan, MexicoUS Forest Serv, USDA, So Res Stn, Pineville, LA 71360, USAUniv Wales, Sch Agr & Forest Sci, Bangor, Gwynedd, WalesQueens Univ, Dept Mech Engn, Kingston, ON K7L 3N6, CanadaEichhorn, SJ, Univ Manchester, Inst Sci & Technol, Ctr Mat Sci, Grosvenor St, Manchester M1 7HS, Lancs, England TI - Review: Current international research into cellulosic fibres and composites AB - The following paper summarises a number of international research projects being undertaken to understand the mechanical properties of natural cellulose fibres and composite materials. In particular the use of novel techniques, such as Raman spectroscopy, synchrotron x-ray and half-fringe photoelastic methods of measuring the physical and micromechanical properties of cellulose fibres is reported. Current single fibre testing procedures are also reviewed with emphasis on the end-use in papermaking. The techniques involved in chemically modifying fibres to improve interfacial adhesion in composites are also reviewed, and the use of novel fibre sources such as bacterial and animal cellulose. It is found that there is overlap in current international research into this area, and that there are complementary approaches and therefore further combining of these may make further progress possible. In particular a need to measure locally the adhesion properties and deformation processes of fibres in composites, with different chemical treatments, ought to be a focus of future research. (C) 2001 Kluwer Academic Publishers MH - Canada MH - United Kingdom MH - France MH - Mexico|Yucatan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 100 U4 - Materials Science, Multidisciplinary U5 - J;Review AV - English IS - 0022-2461 UR - ISI:000168333800001 L2 - REINFORCED POLYESTER COMPOSITES; HALF-FRINGE PHOTOELASTICITY; NANOCOMPOSITE MATERIALS; MECHANICAL-BEHAVIOR; RAMAN-SPECTROSCOPY; EPOXY COMPOSITES; FIBERS; WHISKERS; DEFORMATION; HEMP SO - Journal of Materials Science 2001 ;36(9):2107-2131 2830 UI - 12420 AU - Einasto M AU - Einasto J AU - Tago E AU - Muller V AU - Andernach H AD - Tartu Observ, EE-61602 Toravere, EstoniaAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Guanajuato, Dept Astron, Guanajuato 36000, GTO, MexicoEinasto, M, Tartu Observ, EE-61602 Toravere, Estonia TI - Optical and X-ray clusters as tracers of the supercluster-void network. I. Superclusters of Abell and X-ray clusters AB - We study the distribution of Abell and X-ray-selected clusters of galaxies and derive selection functions of these cluster samples. We find that selection functions and percolation properties of Abell clusters of richness class R = 0 and R greater than or equal to 1 are similar; the percolation of X-ray clusters occurs at the same dimensionless radius as the percolation of Abell clusters. We present a new catalog of superclusters of Abell clusters out to a redshift of z(lim) = 0.13, a catalog of X-ray clusters located in superclusters deter mined by Abell clusters, and a list of additional superclusters of X-ray clusters. We investigate the distribution of X-ray-selected clusters of galaxies with respect to superclusters determined by Abell clusters of galaxies and show that the distribution of X-ray clusters follows the supercluster-void network determined by Abell clusters. We find that X-ray clusters are more strongly clustered than other clusters: the fraction of X-ray clusters is higher in rich superclusters, and the fraction of isolated X-ray clusters is lower than the fraction of isolated Abell clusters. Poor, non-Abell X-ray clusters follow the supercluster-void network as well: these clusters are embedded in superclusters determined by Abell clusters and populate filaments between them MH - Estonia MH - Germany MH - Mexico|Guanajuato PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 35 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000172086100006 L2 - cosmology : observations;galaxies : clusters : general;large-scale structure of universe;LARGE-SCALE DISTRIBUTION; ALL-SKY SURVEY; COLD DARK MATTER; GALAXY CLUSTERS; RICH CLUSTERS; SHAPLEY CONCENTRATION; LOCAL SUPERCLUSTER; ACO CLUSTERS; ROSAT; UNIVERSE SO - Astronomical Journal 2001 ;122(5):2222-2242 2831 UI - 12520 AU - Eliahou S AU - Villarreal RH AD - Univ Littoral, LMPA Joseph Liouville, F-62228 Calais, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoEliahou, S, Univ Littoral, LMPA Joseph Liouville, Batiment H Poincare,50 Rue F Buisson,BP 699, F-62228 Calais, France TI - On systems of binomials in the ideal of a toric variety AB - Let be a toric set in the affine space A(k)(n). Given a set of binomials g(1),...,g(r) in the toric ideal P of we give a criterion for deciding the equality rad(g(1),..,g(r)) =P. This criterion extends to arbitrary dimension, and to arbitrary fields, an earlier result which concerned only monomial curves over an algebraically closed field of characteristic zero MH - France MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000171750400006 L2 - toric variety;monomial curve;binomial ideal SO - Proceedings of the American Mathematical Society 2001 ;130(2):345-351 2832 UI - 14006 AU - Elias-Gutierrez M AU - Smirnov NN AU - Suarez-Morales E AU - mas-Flores N AD - Russian Acad Sci, Inst Ecol & Evolut, Moscow 117071, RussiaInst Mexicano Petr, Mexico City 07730, DF, MexicoElias-Gutierrez, M, El Colegio Frontera Sur Km 2 Carr Chetumal Bacala, Chetumal 77000, Quintana Roo, Mexico TI - New and little known cladocerans (Crustacea : Anomopoda) from southeastern Mexico AB - Mexico represents a transitional area in which two biogeographic regions meet. A survey of the cladocerans collected in true tropical waterbodies from the country revealed a diverse fauna. The environments examined included temporary pools in the forest, rivers, permanent lagoons and karstic sinkholes. New records or little known taxa include: Diaphanosoma brevireme, D. fluviatile, Pseudosida ramosa, Simocephalus mixtus, Onchobunops tuberculatus,Guernella raphaelis, Chydorus nitidilus, Notoalona cf. globulosa, Alonella brasiliensis and Leydigiopsis curvirostris. In contrast to high altitude systems, with clear nearctic affinity, the lowlands of southeastern Mexico showed a striking resemblance with the South and Central American cladoceran fauna. Apparently, orographic barriers control the distribution of the cladoceran taxa in this region MH - Mexico|Distrito Federal MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000167924900003 L2 - SP-NOV; GENUS SO - Hydrobiologia 2001 ;442(1-3):41-54 2833 UI - 13765 AU - Eliraz A AU - Ramirez-Rivera A AU - Ferranti P AU - Holzer R AU - Garcia JMI AU - Turcotte C AU - Rapatz G AU - Pfister P AU - Overend T AU - Kottakis J AD - Novartis HRC, Horsham RH12 5AB, W Sussex, EnglandKaplan Hosp, Dept Pulm Dis, IL-76100 Rehovot, IsraelHosp Enfermedades Cardiovasc & Torax, IMSS, Monterrey, MexicoIst Riabilitaz S Giuseppe Moscati, Benevento, ItalyHosp Gen Basico Serrania Ronda, Serv Neumol, Malaga, SpainClin Mediclub Sanctuaire, Montreal, PQ, CanadaNovartis Pharma AG, Basel, SwitzerlandKottakis, J, Novartis HRC, Wimblehurst Rd, Horsham RH12 5AB, W Sussex, England TI - Similar efficacy following four weeks treatment of asthmatics with formoterol 12 mu g BD delivered by two different dry powder inhalers: Differences in inhaler handling AB - This randomised, multicentre, parallel-group study compared the clinical efficacy and ease of handling of two dry powder inhalers delivering the long-acting beta (2)-agonist formoterol. After run-in, 200 asthmatics on treatment with inhaled corticosteroids and still presenting with suboptimal asthma control were randomised to receive 12 mug formoterol twice daily via either the Aerolizer inhaler (Foradil (R) Aerolizer (TM)) or the Turbuhaler inhaler (Oxis (R) Turbuhaler (R)) for four weeks. Study variables included the mean morning pre-medication peak expiratory flow (PEF) during the last seven days of treatment and the correct inhaler handling according to inhaler-specific checklists. The mean difference in the effect on morning pre-medication PEF was 13.86 l/min in favour of formoterol via the Aerolizer inhaler (90% confidence interval 2.50, 25.21) in the intent-to-treat population. Eighty-six per cent of the patients under treatment with formoterol via the Turbuhaler inhaler performed correctly all the essential inhalation manoeuvres, whereas 98% of those on the Aerolizer inhaler did so. These results strongly suggest similar clinical efficacy with twice daily treatment of formoterol 12 mug metered dose delivered either by the Aerolizer, or the Turbuhaler device. They also suggest that handling the Aerolizer is easier than that of the Turbuhaler MH - Canada MH - United Kingdom MH - Israel MH - Italy MH - Mexico|Nuevo Leon MH - Spain MH - Switzerland PB - SURREY: MEDICOM INTERNATIONAL RP - NOT IN FILE U3 - TC 11 U4 - Medicine, General & Internal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1368-5031 UR - ISI:000168503000004 L2 - SALMETEROL; STEROIDS; THERAPY; DRUGS SO - International Journal of Clinical Practice 2001 ;55(3):164-170 2834 UI - 13215 AU - Elizalde-Gonzalez MP AU - Mattusch J AU - Wennrich R AU - Morgenstern P AD - Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla 72570, MexicoEnvironm Res Ctr, Dept Analyt Chem, D-04318 Leipzig, GermanyElizalde-Gonzalez, MP, Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Apdo Postal J-55, Puebla 72570, Mexico TI - Uptake of arsenite and arsenate by clinoptilolite-rich tuffs AB - Clinoptilolite-containing rocks were used to study the possible uptake of arsenite (H(3)ASO(3)) and arsenate (H2AsO4) species from aqueous solution. Two samples also exhibited mordenite and erionite zeolitic phases. Batch and isotherm studies at pH 4 in the concentration range 0.1 < C < 4 mg l(-1) were performed. The experimental data were used to model Freundlich, Langmuir and Langmuir-Freundlich adsorption isotherms. Solutions were analyzed by means of ion chromatography coupled with inductively coupled plasma mass spectrometric detection (IC-ICP-MS). All zeolitic samples investigated removed more H2AsO4- than H3AsO3 at equivalent arsenic concentrations. Although the saturation capacity of the tuffs studied was inversely related to the silicium dioxide content and directly to the iron content in the acid-washed zeolite, the addition of iron did not significantly improve the removal efficiency. Up to 98% of H3AsO3 were removed from a 500 mug As l(-1) solution by three of the samples studied after a contact time of 70 days. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000170099800014 L2 - arsenic;zeolites;clinoptilolite;adsorption and removal;AQUEOUS-SOLUTION; ION-EXCHANGE; GROUND-WATER; REMOVAL; ADSORPTION; SORPTION; COPPER; CARBON; SOILS; HUSK SO - Microporous and Mesoporous Materials 2001 ;46(2-3):277-286 2835 UI - 14278 AU - Elizalde-Gonzalez MP AU - Mattusch J AU - Wennrich R AD - Univ Autonoma Puebla, Ctr Quim, Puebla 72570, MexicoUFZ, Ctr Environm Res Leipzig Halle, Dept Analyt Chem, D-04318 Leipzig, GermanyElizalde-Gonzalez, MP, Univ Autonoma Puebla, Ctr Quim, Apdo Postal J-55, Puebla 72570, Mexico TI - Application of natural zeolites for preconcentration of arsenic species in water samples AB - Zeolites of the clinoptilolite type produced in Mexico and Hungary were investigated with respect to their sorption efficiency for various redox species of arsenic. Long-term experiments showed that arsenate remains stable for a long period in spiked deionised water and drinking water, as well as in the surface water of the Biela valley in Saxony, Germany. Both clinoptilolites are able to decrease the initial arsenic concentration of 200 mug l(-1) by more than 75% in deionised, drinking, ground and sur face waters. In the case of the Mexican zeolite, both the arsenite and the arsenate concentrations (200 mug l(-1))can be lowered from 200 mug l(-1) to 10 mug l(-1) which is the World Health Organisation's (WHO's) recommended maximum level. It was found that the presence of cations and anions in the natural waters of Biela, Germany, and Zimapan, Mexico, did not reduce the efficiency of the selected zeolites. The Hungarian zeolite removed 75% of the arsenate in the Zimapan water and only 50% when the sample was first acidified. This zeolite totally desorbed the fixed arsenic into a water volume that was half the volume in the adsorption experiment MH - Germany MH - Mexico|Puebla PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Analytical;Environmental Sciences U5 - J;Article AV - English IS - 1464-0325 UR - ISI:000167055700009 L2 - DRINKING-WATER; MEXICO SO - Journal of Environmental Monitoring 2001 ;3(1):22-26 2836 UI - 14570 AU - Elizalde-Gonzalez MP AU - Mattusch J AU - Einicke WD AU - Wennrich R AD - Univ Autonoma Puebla, Ctr Quim, Puebla 72570, Pue, MexicoEnvironm Res Ctr, Dept Analyt Chem, D-04318 Leipzig, GermanyUniv Leipzig, Inst Tech Chem, D-04103 Leipzig, GermanyElizalde-Gonzalez, MP, Univ Autonoma Puebla, Ctr Quim, Apdo Postal J-55, Puebla 72570, Pue, Mexico TI - Sorption on natural solids for arsenic removal AB - Steady state experiments were conducted on arsenic sorption from aqueous solutions by natural solids to test the feasibility of these materials to act as concentrator for arsenic removal from groundwater and drinking water. The solids considered were natural zeolites, volcanic stone, and the cactaceous powder CACMM. The arsenic species studied were As(III), As(V), dimethylarsinic acid (DMA) and phenylarsonic acid (PHA). The arsenic removed was determined from the data obtained by measuring the concentration diminution of the arsenic species in the liquid phase at equilibrium before and after the adsorption experiment by means of ICP-AES for the total concentration of arsenic and IC-ICP-MS to determine the arsenic species. The latter method allowed the detection of As(V) additionally formed as a result of the oxidation of As(III) on some of the zeolites. The sorption of the arsenic species onto zeolites was studied on both non-activated and activated zeolites, as well as on zeolites hydrogenated or modified with iron, and with respect to varying pH. The kinetics and the ability to desorb and readsorb the arsenic species were investigated for selected zeolites. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Puebla PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 45 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 1385-8947 UR - ISI:000166236600021 L2 - natural solids;arsenic;sorption;zeolites;ADSORPTION; WATER; ADSORBENT; ION SO - Chemical Engineering Journal 2001 ;81(1-3):187-195 2837 UI - 11943 AU - Elizondo-Riojas MA AU - Kozelka J AD - Univ Paris 05, UMR 8601 CNRS, Chim & Biochim Pharmacol & Toxicol Lab, F-75270 Paris 06, FranceKozelka, J, Univ Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzales, Ctr Univ Canc, Monterrey, NL, Mexico TI - Unrestrained 5 ns molecular dynamics simulation of a cisplatin-DNA 1,2-GG adduct provides a rationale for the NMR features and reveals increased conformational flexibility at the platinum binding site AB - A 5 ns unrestrained molecular dynamics (MD) simulation of the DNA duplex d(GCCG*G*ATCGC)-d(GCGATCCGGC), bearing a cis-Pt(NH3)(2)(2+) 2 unit crosslinking the two G* guanine bases, is reported. The MD trajectory was a posteriori correlated with NMR data determined for the same adduct, and it is shown that interproton distances and the characteristic chemical shifts are accounted for by the simulation. The simulation and its confrontation with the NMR data have confirmed the finding derived early from static models that the cytosine complementary to the 5' G*, C17, is mobile with respect to its adjacent bases. However, in contrast to our previous description of this mobility, which included rupture of the Watson-Crick hydrogen bonds and formation of non-Watson-Crick hydrogen bonds, the MD simulation indicated that the G*4-C17 pair moves continuously along a trajectory roughly perpendicular to the local helix axis, with retention of all three Watson-Crick hydrogen bonds. The simulation indicated the reversible formation of a hydrogen bond between the 5' oriented NH3 ligand of platinum and the C3pG*4 phosphate group, in accord with our former prediction. Furthermore, the simulation has disclosed previously undetected BI--> BII transitions at the G*5pA6 and A6pT7 steps, connected to formation/rupture of a hydrogen bond between the 3' oriented NH3 ligand of platinum and the N7 atom of A6. All these conformational equilibria affect the form of the minor groove and increase the conformational flexibility at the platination site, and are thus likely to facilitate recognition by cellular proteins. (C) 2001 Academic Press MH - France MH - Mexico|Nuevo Leon PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0022-2836 UR - ISI:000173365300024 L2 - cisplatin;molecular dynamics simulations;HMG1;LEF-1;BI reversible arrow BII transitions;NUCLEAR-MAGNETIC-RESONANCE; ANTICANCER DRUG CISPLATIN; INTRASTRAND CROSS-LINK; PARTICLE MESH EWALD; REPAIR PROTEIN MUTS; MAJOR ADDUCT; DECANUCLEOTIDE DUPLEX; CRYSTAL-STRUCTURES; FORCE-FIELD; ACIDS SO - Journal of Molecular Biology 2001 ;314(5):1227-1243 2838 UI - 12157 AU - Ellertson C AU - Trussell J AU - Stewart F AU - Koenig J AU - Raymond EG AU - Shochet T AD - Populat Council, Reprod Hlth Latin Amer & Caribbean, Mexico City 04000, DF, MexicoPrinceton Univ, Woodrow Wilson Sch Publ & Int Affairs, Princeton, NJ 08544, USAPrinceton Univ, Off Populat Res, Princeton, NJ 08544, USAUniv Calif San Francisco, Ctr Reprod Hlth Res & Policy, San Francisco, CA 94143, USAHenry J Kaiser Family Fdn, Online Outreach & Partnerships, Menlo Pk, CA, USAFamily Hlth Int, Biomed Affairs Div, Res Triangle Pk, NC 27709, USAEllertson, C, Populat Council, Reprod Hlth Latin Amer & Caribbean, Excondida 110,Col Villa Coyoacan, Mexico City 04000, DF, Mexico TI - Emergency contraception AB - Emergency contraceptives are methods that prevent pregnancy when used shortly after unprotected sex. Three different emergency contraceptive methods are safe, simple, and widely available in the United States. These are: (1) ordinary combined oral contraceptives containing ethinyl estradiol and levonorgestrel taken in a higher dose for a short period of time and started within a few days after unprotected intercourse; (2) levonorgestrel-only tablets used similarly; and (3) copper-bearing intrauterine devices inserted within approximately 1 week after unprotected intercourse. Emergency contraceptive use is best known for women who have been raped, but the methods are also appropriate for women who have experienced condom breaks, women who did not use any method because they were not planning on having sex, or women who had unprotected intercourse for any other reason. Unfortunately; few women know about emergency contraceptives, and few clinicians think to inform their patients routinely about the option. A nationwide toll-free hotline (1-888-NOT-2-LATE) and a website (http://not-2late.com) can help women learn about these options. Sharing "family planning's best-kept secret" widely with women could prevent as many as a million unwanted pregnancies annually in the United States MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: THIEME MEDICAL PUBL INC RP - NOT IN FILE U3 - TC 5 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 1526-8004 UR - ISI:000172704700006 L2 - emergency contraception;postcoital;Yuzpe;levonorgestrel;copper-IUD;POST-COITAL CONTRACEPTION; YUZPE REGIMEN; ETHINYLESTRADIOL COMBINATION; POSTCOITAL CONTRACEPTION; UNINTENDED PREGNANCY; DL-NORGESTREL; ENDOMETRIUM; LEVONORGESTREL; METAANALYSIS; KNOWLEDGE SO - Seminars in Reproductive Medicine 2001 ;19(4):323-330 2839 UI - 12707 AU - Ellertson C AU - Ambardekar S AU - Hedley A AU - Coyaji K AU - Trussell J AU - Blanchard K AD - Populat Council, Mexico City 04000, DF, MexicoKEM Hosp, Pune, Maharashtra, IndiaPrinceton Univ, Off Populat Res, Princeton, NJ 08544, USAPopulat Council, Johannesburg, South AfricaEllertson, C, Populat Council, Escondida 110, Mexico City 04000, DF, Mexico TI - Emergency contraception: Randomized comparison of advance provision and information only AB - OBJECTIVE: To determine whether multiple courses of emergency contraceptive therapy supplied in advance of need would tempt women using barrier methods to take risks with their more effective ongoing contraceptive methods. METHODS: We randomly assigned 411 condom users attending an urban family planning clinic in Pune, India, to receive either information about emergency contraception along with three courses of therapy to keep in case of need, or to receive only information, including that about the locations where they could obtain emergency contraception if needed. For up to I year, women returned quarterly for follow-up, answering questions about unprotected intercourse, emergency contraceptive use, pregnancies, sexually transmitted infections, and acceptability. RESULTS: Women given advance supplies reported unprotected intercourse at rates nearly identical to those among women given only information (0.012 versus 0.016 acts per month). Among those who did have unprotected intercourse, however, supply recipients were nearly twice as likely (79% versus 44%) to have taken emergency contraception, although numbers were too small to permit statistically significant inferences. No women used emergency contraception more than once during the study, even though everyone in the advance-supplies group had extra doses available. All women found knowing about emergency contraception useful, and all those receiving only information wished they had received supplies as wen. CONCLUSION: Multiple emergency contraception doses supplied in advance did not tempt condom users to risk unprotected intercourse. After unprotected intercourse, however, those with pills on hand used them more often. Women found advance provision useful. (C) 2001 by the American College of Obstetricians and Gynecologists MH - India MH - Mexico|Distrito Federal MH - South Africa MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 57 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0029-7844 UR - ISI:000171374400008 SO - Obstetrics and Gynecology 2001 ;98(4):570-575 2840 UI - 11999 AU - Ellsworth PC AU - Martinez-Carrillo JL AD - Univ Arizona, Dept Entomol, Maricopa Agr Ctr, Maricopa, AZ 85239, USAINIFAP, Dept Entomol, Yaqui Valley Expt Field Stn, Obregon, Sonora, MexicoEllsworth, PC, Univ Arizona, Dept Entomol, Maricopa Agr Ctr, 37860 W Smith Enke Rd, Maricopa, AZ 85239 USA TI - IPM for Bemisia tabaci: a case study from North America AB - model of whitefly integrated pest management (IPM) has been proposed that conveniently organizes all Bemisia tabaci control tactics into a multi-level, multi-component pyramid and defines three major keys as "sampling". "effective chemical use", and "avoidance". Each component is described along with information about its implementation, adoption, and importance in the low (< 700 m) desert agroecosystem of North America, which recently sustained the introduction and expansion of the B biotype during the 1990s. Insect growth regulators (buprofezin and pyriproxyfen; insect growth regulator (IGR)) in cotton and imidacloprid use in vegetables and melons were key chemical tactics, especially in the US, that were fully integrated with formal sampling plans and action thresholds, and resistance management guidelines. In Mexico, tactics of avoidance such as mandatory planting and harvest dates, post-harvest sanitation, and host-free periods along with strategic use of insecticides implemented cooperatively were key to the recovery of this agroecosystem. A concept, "bioresidual", was developed to explain the extended period of suppression possible through the proper use of IGRs. Organized and sustained grower education was key to the areawide adoption and deployment of this successful IPM plan, which has drastically lowered whitefly targeted insecticide use and whitefly related problems since 1996. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Sonora PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 33 U4 - Agronomy U5 - J;Article AV - English IS - 0261-2194 UR - ISI:000173222900011 L2 - Bemisia tabaci;Bemisia argentifolii;cotton;insect growth regulators;sampling;thresholds;avoidance;bioresidual;IPM;SILVERLEAF WHITEFLY HOMOPTERA; INTEGRATED PEST-MANAGEMENT; INFECTIOUS YELLOWS VIRUS; BINOMIAL SAMPLING PLANS; ARGENTIFOLII HOMOPTERA; ACTION THRESHOLDS; ALEYRODIDAE INFESTATIONS; SPATIAL-DISTRIBUTION; MANAGING RESISTANCE; POPULATION-DENSITY SO - Crop Protection 2001 ;20(9):853-869 2841 UI - 14614 AU - Elmegreen DM AU - Kaufman M AU - Elmegreen BG AU - Brinks E AU - Struck C AU - Klaric M AU - Thomasson M AD - Vassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604, USAOhio State Univ, Dept Phys, Columbus, OH 43210, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAIBM Corp, Div Res, TJ Watson Res Ctr, Yorktown Heights, NY 10598, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoIowa State Univ, Dept Phys & Astron, Ames, IA 50010, USAOnsala Space Observ, S-43992 Onsala, SwedenElmegreen, DM, Vassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604 USA TI - Hubble Space Telescope observations of dust and star-forming regions in the ocular galaxy IC 2163 and its spiral companion NGC 2207 AB - Hubble Space Telescope observations in U, B, V, and I passbands of the interacting spiral galaxies IC 2163 and NGC 2207 are used to measure extinctions in the cloud and intercloud regions and ages and luminosities of the star-forming regions. The extinction in the part of NGC 2207 seen in projection against IC 2163 was determined by using the method of White & Keel. The extinctions there and elsewhere were also determined from radiative transfer models of the magnitude differences between clouds and their surroundings. The intercloud extinction in V band ranges from 0.5 to 1 mag on the line of sight, and the cloud extinction ranges from 1 to 2 mag. The measured star-forming regions in these galaxies have a power-law relation between size and luminosity and a power-law luminosity distribution function. These power laws are consistent with a fractal dimension for the star formation that is the same as that for interstellar gas, D similar to 2.2, extending over scales ranging from 20 to 1000 pc. Fifteen compact massive star clusters that are analogous to super-star clusters found in starburst regions are in the spiral arms of NGC 2207. Nothing is peculiar about these regions except for a high H I velocity dispersion (similar to 50 km s(-1)). Two more super-star clusters are in the tidally compressed oval of IC 2163. These clusters have masses ranging from similar to 10(4) to 2 x 10(5) M-. and ages of a few times 10(6) yr MH - Mexico|Guanajuato MH - Sweden MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000166173300014 L2 - dust, extinction;galaxies : individual (IC 2163, NGC 2207);galaxies : interactions;galaxies : star clusters;LUMINOSITY FUNCTION; FORMATION MECHANISM; GLOBULAR-CLUSTERS; MOLECULAR CLOUDS; DWARF GALAXIES; EXTINCTION LAW; H-I; MODELS; COMPLEXES; DISKS SO - Astronomical Journal 2001 ;121(1):182-197 2842 UI - 13824 AU - Elul B AU - Hajri S AU - Nguyen TNN AU - Ellertson C AU - Ben Slama C AU - Pearlman E AU - Winikoff B AD - Populat Council, New York, NY 10021, USATunisian Soc Endocrinol, Tunis, TunisiaHung Vuong Hosp, Ho Chi Minh City, VietnamPopulat Council, Mexico City, DF, MexicoWinikoff, B, Populat Council, 1230 York Ave, New York, NY 10021, USA TI - Can women in less-developed countries use a simplified medical abortion regimen? AB - Background Mifepristpne-misoprostol abortion, consisting of oral pills. is potentially simple and safe enough for use in less-developed countries. But the labour-intensive, costly, clinic-based European protocols are not affordable or feasible in most less-developed countries. Methods We prospectively tested two simplifications to the French mifepristone-misoprostol regimen in Vietnam and Tunisia. Women (n = 315) with amenorrhoea 8 weeks or less since their last menstrual period received 200 mg mifepristone in the clinic and then chose whether to take 400 mug oral misoprostol 2 days later either at home or in the clinic. Findings Despite the two-thirds reduction in mifepristone dose, success rates were high: Vietnam 93%, Tunisia 91%. About 88% of participants chose home administration of misoprostol. Most Vietnamese and Tunisian women were satisfied with their abortions, but efficacy and satisfaction rates were higher among those who used misoprostol at home. Interpretations A simplified medical abortion regimen of 200 mg mifepristone followed by the option of home administration of misoprostol seems feasible MH - Mexico|Distrito Federal MH - Tunisia MH - USA MH - Vietnam PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 30 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000168478200012 L2 - VAGINAL MISOPROSTOL; MIFEPRISTONE; HOME SO - Lancet 2001 ;357(9266):1402-1405 2843 UI - 12625 AU - Emberson LD AU - Ashmore MR AU - Murray F AU - Kuylenstierna JCI AU - Percy KE AU - Izuta T AU - Zheng Y AU - Shimizu H AU - Sheu BH AU - Liu CP AU - Agrawal M AU - Wahid A AU - bdel-Latif NM AU - van Tienhoven M AU - de Bauer LI AU - Domingos M AD - Univ York, SEI, York, N Yorkshire, EnglandUniv Bradford, Dept Environm Sci, Bradford BD7 1DP, W Yorkshire, EnglandNat Resources Canada, Fredericton, NB, CanadaMurdoch Univ, Murdoch, WA 6150, AustraliaTokyo Univ Agr & Technol, Dept Environm & Nat Resources Sci, Tokyo 1838509, JapanNatl Inst Environm Studies, Tsukuba, Ibaraki, JapanNatl Chunghsing Univ, Dept Forestry, Taipei, TaiwanBanaras Hindu Univ, Dept Bot, Varanasi 221005, Uttar Pradesh, IndiaPunjab Univ, Dept Bot, Lahore 54590, PakistanCSIR Environmentek, ZA-0001 Pretoria, South AfricaInst Recursos Nat, Montecillo 56230, MexicoInst Bot, Secao Ecol, BR-01061970 Sao Paulo, BrazilEmberson, LD, Univ York, SEI, Box 373, York, N Yorkshire, England TI - Impacts of air pollutants on vegetation in developing countries AB - The predicted increases in emissions of primary pollutants in many rapidly industrializing countries may have severe consequences for the health and productivity of forest trees and agricultural crops. This paper presents a review of air pollution impacts on vegetation in developing countries by summarising information describing the direct impacts to vegetation caused by a number of air pollutants (sulphur dioxide (SO2), nitrogen oxides (NOx), ozone (O-3) and Suspended Particulate Matter (SPM)). This information has been collected by experts from a number of rapidly industrializing countries in Asia, Latin America and Africa and includes observations of visible injury in the field and the use of transect studies and controlled experimental investigations to ascribe damage to different pollutant concentrations. The ability to synthesise this information to define exposure-response relationships and subsequent air quality guidelines similar to those established in North America and Europe is assessed. In addition, the use of regional and global models describing pollution concentrations is discussed with reference to assessing the extent of adverse impacts and identifying regions likely to be most at risk from air pollution, both for the present day and in the future. The evidence summarised in the paper clearly shows that current pollutant concentrations experienced in many developing countries, particularly Asia, can result in severe damage to vegetation and that without appropriate control measures such damage is likely to worsen in the future as pollutant emissions increase MH - Australia MH - Brazil MH - Canada MH - United Kingdom MH - India MH - Japan MH - Mexico|Estado De Mexico MH - Pakistan MH - South Africa MH - Taiwan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 24 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000171538500013 L2 - air pollution;developing country;exposure-response relationships;policy tools;vegetation effects;SO2;NOx;O-3;SPM;OZONE; POLLUTION; ATMOSPHERE; EUROPE SO - Water Air and Soil Pollution 2001 ;130(1-4):107-118 2844 UI - 12828 AU - Enriquez A AU - Viana MT AU - Vasquez C AU - Shimada A AD - Univ Autonoma Baja California, Fac Ciencias Mar, Ensenada, Baja California, MexicoUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoDirecc Gen Zool Ciudad Mexico, Direcc Tecn Adm, Chapultepec, DF, MexicoUniv Nacl Autonoma Mexico, Fac Estud Super Cuautitlan, Ajuchitlan, Qro, MexicoViana, MT, POB 189003-70, Coronado, CA 92178, USA TI - Digestion of cellulose by stomach homogenates of green abalone (Haliotis fulgens) AB - Three experiments were conducted to study the cellulase activity of stomach homogenates of green abalone, with and without antibiotics added. Forty-eight previously frozen stomachs from wild abalone adults were thawed and individually homogenized. Four cultured abalone adults maintained under a balanced diet containing cellulose were killed and the fresh stomach samples processed. Cellulase activity was estimated through the production of glucose, incubating the homogenate from each organism with cellulose. To determine the effect of bacteria, each stomach was incubated (at 25 degreesC for 20 h) in a completely randomized design, with and without an antibiotic mixture. For a time series measurement (exp. 2), four homogenates from wild abalone were used; the incubation mixture was followed up taking samples at 0, 1, 2,4, 8, 16, 20, 32, 64 and 72 h. The latter samples were also used to measure the enzymatic activity before and after a 72-h incubation, in the absence of antibiotics (exp. 3). Initial bacterial counts in the wild abalone homogenates were 459 colonies per mL. In the presence of the antibiotic mixture, no bacterial growth was observed. Initial cellulase activity was 1.6 Units. Cellulose degradation figures were low, even in the absence of antibiotics, indicating the low dependence of abalone on the nutrients derived from the digestion of the cell walls. Still, the addition of antibiotics depressed the digestion of cellulose (14.5 vs. 10.2%), suggesting the importance of live bacteria in the digestion process, and that the majority of the degraded cellulose is perhaps acted upon by endogenous enzymes. The time series experiment of samples from wild abalone, with and without antibiotics, showed quadratic effects on cellulose digestion y = 7.55 + .29h - .005 h(2) (r(2) = .2212), but no significant differences between treatments. The gradual increase in the digestion of cellulose, followed by a plateau is similar to what happens in ruminant digestion. The initial and final enzyme activity without antibiotics showed a significant reduction of 41.1% for the wild abalone whereas in cultured abalone a 50.9% significant reduction was observed. It seems that the cellulase complex enzymes present in the homogenates remain active after 72 h of incubation, even though their activity is lowered by about one half. Although the use of antibiotics assure the absence of live bacteria in the incubation mixture, the cellular enzymes possibly freed by the effect of the antibiotics could still be active for up to 72 h after the microbes are no longer viable. Thus the enzymatic activity attributed to the stomach itself could still be confounded MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000171043000037 L2 - green abalone;Haliotis fulgens;cellulose;digestion;bacteria;antibiotics;BACTERIA; DIETS SO - Journal of Shellfish Research 2001 ;20(1):297-300 2845 UI - 12644 AU - Enriquez S AU - Marba N AU - Duarte CM AU - van Tussenbroek BI AU - Reyes-Zavala G AD - UIB, CSIC, Inst Mediterrani Estudis Avancats, Grp Oceanog Interdisciplinar, Esporles 07190, Illes Balears, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Cancun 77500, Quintana Roo, MexicoMarba, N, UIB, CSIC, Inst Mediterrani Estudis Avancats, Grp Oceanog Interdisciplinar, Miquel Marques 21, Esporles 07190, Illes Balears, Spain TI - Effects of seagrass Thalassia testudinum on sediment redox AB - The redox conditions were compared in vegetated versus unvegetated sediments across a range of contrasting Thalassia testudinum (sometimes mixed with Syringodium filiforme) meadows at Puerto Morelos Mexico reef lagoon, Moreover, the role of seagrass photosynthetic activity in affecting the redox conditions was tested in one of the meadows by experimentally reducing seagrass photosynthesis through shading. The seagrass rhizosphere extended 26 to 40 cm into the sediment, and accounted for 23 to 504 g DW m(-2) of root material, mostly contributed by T testudinum. T testudinum placed 50% (i.e. centroidal depth) and 95% of its root biomass within 12.6 +/- 0.58 and 54.4 +/- 2.53 cm. of the sediment surface, respectively; while S. filiforme placed 50 and 95% of its root biomass within 8.0 +/- 0.87 and 343 +/- 3.8 cm of the sediment surface, respectively, Vegetated sediments presented 50% of positive redox potential anomaly (i.e, redox potential in vegetated sediments-redox potential in adjacent bare sediments), remarkably similar (t-test, p > 0.5) to depths to the centroidal depth of the seagrass roots in the sediments. The shading experiment conducted in situ for 5 d demonstrated that the positive redox anomaly found at depth in vegetated sediments was derived from seagrass photosynthetic activity. The sediments around seagrass rhizosphere in the shaded plots were progressively reduced to reach an average decline of the redox conditions by about 45 mV by Day 5. The results presented show that seagrasses contribute to modify sediment redox conditions around their rhizosphere MH - Mexico|Quintana Roo MH - Spain PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 14 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000171439300012 L2 - Thalassia testudinum;Syringodium filiforme;rhizosphere;redox conditions;Mexican Caribbean;ROOT DISTRIBUTIONS; SULFATE REDUCTION; ZOSTERA-NOLTII; CORAL-REEF; PHOTOSYNTHESIS; PHOTOINHIBITION; RHIZOSPHERE; DYNAMICS; BIOMASS; RATES SO - Marine Ecology-Progress Series 2001 ;219():149-158 2846 UI - 12050 AU - Equihua C AU - Newton AE AU - Garcia-Avila D AU - De Luna E AU - Gradstein SR AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoNat Hist Museum, Dept Bot, London SW7 5BD, EnglandInst Ecol AC, Xalapa 91000, Veracruz, MexicoUniv Gottingen, Inst Plant Sci, D-37073 Gottingen, GermanyEquihua, C, Univ Nacl Autonoma Mexico, Inst Ecol, Ap Postal 70-275, Mexico City 04510, DF, Mexico TI - New moss records for Mexico from the Lacandona tropical rain forest, Chiapas AB - This paper reports nine new moss records for Mexico from the Lacandona Forest: Calymperes rubiginosum, Fissidens guianensis var. guianensis, Mniomalia viridis, Orthostichella hexasticha, Orthostichopsis praetermisa, Phyllodrepanium falcifolium, Syrrhopodon flexifolius. Syrrhopodon africanus subsp. graminicola, and Syrrhopodon hornschuchii. Findings reported here demonstrate that there is still incomplete knowledge of the moss diversity in the Lacandona tropical rain forest region. Future research in tropical forests of southeastern Mexico and Central America will help to corroborate the continuity of distributional patterns from South America to North America through the Central American bridge MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000173169600013 L2 - SEED DISPERSAL SO - Bryologist 2001 ;104(4):602-606 2847 UI - 12542 AU - Erbudak M AU - Hensch A AU - Keller J AU - Rossner B AU - Kortan AR AD - ETH Zurich, Festkorperphys Lab, CH-8093 Zurich, SwitzerlandLucent Technol, Bell Labs, Murray Hill, NJ 07974, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoErbudak, M, ETH Zurich, Festkorperphys Lab, CH-8093 Zurich, Switzerland TI - An empirical study of the Mn partial density of states in icosahedral Al70Pd20Mn10 AB - Using the line-shape analysis of the Mn 2p(3/2)3d3d Auger transitions and by observing the Mn 3p --> 3d transitions in electron energy-loss spectroscopy, we have studied the local density of electronic states of the crystalline cubic and the quasicrystalline icosahedral phases of Al70Pd20Mn10. We find that, in the cubic phase the Mn 3d states coincide with the Fermi level EF, but in the quasicrystalline state the Mn 3d band is fully occupied and shifted to lower binding energies causing a significant reduction in the density of states at E-F. (C) 2001 Elsevier Science BY. All rights reserved MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Spectroscopy U5 - J;Article AV - English IS - 0368-2048 UR - ISI:000171815700005 L2 - AlPdMn;density of states;pseudogap;Auger transitions;EELS;ELECTRONIC-STRUCTURE; QUASI-CRYSTAL; AUGER-SPECTRA; PHOTOEMISSION; ALLOYS; METALS; NI SO - Journal of Electron Spectroscopy and Related Phenomena 2001 ;120(1-3):47-53 2848 UI - 12373 AU - Eremenko VV AU - Samovarov VN AU - Vakula VL AU - Libin MY AU - Uyutnov SA AU - Rashkovan VM AD - Natl Acad Sci Ukraine, BI Verkin Physicotech Inst Low Temp, UA-61103 Kharkov, UkraineInst Politecn Nacl Mexico, Esime, Culhuacan, MexicoEremenko, VV, Natl Acad Sci Ukraine, BI Verkin Physicotech Inst Low Temp, Pr Lenina 47, UA-61103 Kharkov, Ukraine TI - Identification of the stripe state of a YBa2Cu3O6+x superconductor according to optical absorption data AB - The doublet structure of the electron-bimagnon absorption band with maxima at 2.145 and 2.28 eV is observed for the first time for the metallic phase of YBa2Cu3O6+x with x=0.85 (T-c=88 K). As the YBCO film cools down, the doublet band arises quite sharply near the pseudogap state at T < 130 K and remains in the superconducting phase at T Sigma (-) =(0.61 +/- 0.12(stat.) +/- 0.09(syst.)) fm(2). The proton and pi (-) charge radii were measured as well and are consistent with results of other experiments. Our result agrees with the recently measured strong interaction radius of the Sigma (-). (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172602500005 L2 - electromagnetic form factors;elastic scattering;hadron-induced elastic scattering at high energy;hyperons;electron-Sigma(-) elastic scattering;Sigma(-) form factor;Sigma(-) charge radius;hadron strong and electromagnetic radii SO - Physics Letters B 2001 ;522(3-4):233-239 2853 UI - 12852 AU - Escribano A AU - Williams T AU - Goulson D AU - Cave RD AU - Chapman JW AU - Caballero P AD - Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainECOSUR, AP 36, Tapachula 30700, Chiapas, MexicoUniv Southampton, Southampton SO16 7PX, Hants, EnglandEscuela Agr Panamer, AP 93, El Zamorano, HondurasCaballero, P, Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, Spain TI - Consequences of interspecific competition on the virulence and genetic composition of a nucleopolyhedrovirus in Spodoptera frugiperda larvae parasitized by Chelonus insularis AB - Nucleopolyhedroviruses (Baculoviridae) are virulent insect pathogens that generally show a high degree of host specificity and have recognized potential as biological insecticides. Whenever viruses are applied for pest control, a proportion of the infected insects will also be parasitized by hymenopteran or dipteran parasitoids and interspecific competition for host resources will occur; the severity of such competition is likely to be modulated to a large degree by the virulence of each type of parasite. We examined the impact of parasitism by the solitary egg-larval endoparasitoid Chelonus insularis (Hymenoptera: Braconidae) on the speed of kill of nucleopolyhedrovirus-infected Spodoptera frugiperda (Lepidoptera: Noctuidae) larvae and the pattern of host growth and virus production in infected and/or parasitized hosts. We also examined the effect of parasitism on the virulence, infectivity and genetic composition of serially passaged virus. Both parasitism and viral infection resulted in a marked reduction in host growth. When third instar larvae were dually parasitized and virus-infected, the growth rate was even more severely affected compared to parasitized larvae. There was a significant increase in virus production in larvae infected at later instars. Interspecific competition resulted in a substantial decrease in pathogen production in parasitized larvae infected at the fourth instar, but not in parasitized larvae infected at earlier instars. The serial passage experiment resulted in the appearance of four distinct genetic isolates of the virus detected by restriction endonuclease analysis. Of the three isolates that appeared in nonparasitized larvae, two showed increased virulence, expressed by mean time to death, and for one of these the infectivity, expressed as LC50, was reduced. One isolate that appeared in parasitized larvae (isolate D) had increased virulence and infectivity. Southern blot analysis indicated that virus isolate D was most likely generated by point mutation of a restriction site or by alterations such as duplications, deletions or by recombination of two or more genotypic variants present in the wild-type nucleopolyhedrovirus isolate. Our study provides clear evidence of interspecific competition within the host, since, depending on the timing of inoculation, adverse effects were observed upon both the parasitoid and the virus MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 0958-3157 UR - ISI:000171038500008 L2 - Spodoptera frugiperda;Chelonus insularis;SfMNPV;infectivity;lethal time;genetic isolates;interspecific competition;NUCLEAR POLYHEDROSIS-VIRUS; MICROPLITIS-CROCEIPES HYMENOPTERA; AGROTIS-SEGETUM LARVAE; ANTICARSIA-GEMMATALIS; GRANULOSIS-VIRUS; BACULOVIRUS BIOINSECTICIDE; RECOMBINANT BACULOVIRUSES; AUTOGRAPHA-CALIFORNICA; APANTELES-GLOMERATUS; GENOTYPIC VARIANTS SO - Biocontrol Science and Technology 2001 ;11(5):649-662 2854 UI - 13111 AU - Escudero R AU - Briggs A AU - Monceau P AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Distrito Federal 04510, MexicoCNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble, FranceEscudero, R, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Distrito Federal 04510, Mexico TI - Point contact characteristics of NbSe3 in the superconducting state AB - A study of the electronic properties of NbSe3 using NbSe3-NbSe3 junctions has been made. Structures in the current against voltage curves and in the differential resistance against voltage curves were observed and studied as functions of temperature between 8 K and 0.4 K and magnetic field up to 1 T. Analysis of the data shows that the pressure applied at the contact is sufficient to make NbSe3 superconducting MH - France MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000170404600009 L2 - SPECTROSCOPY; METAL; GAP SO - Journal of Physics-Condensed Matter 2001 ;13(29):6285-6295 2855 UI - 13763 AU - Esparza-Lopez J AU - Montiel JL AU - Vilchis-Landeros MM AU - Okadome T AU - Miyazono K AU - Lopez-Casillas F AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoInst Canc, Toshima Ku, Tokyo 1708455, JapanLopez-Casillas, F, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Apartado Postal 70-246, Mexico City 04510, DF, Mexico TI - Ligand binding and functional properties of betaglycan, a co-receptor of the transforming growth factor-beta superfamily - Specialized binding regions for transforming growth factor-beta and inhibin A AB - Betaglycan, also known as the transforming growth factor-beta (TGF-beta) type III receptor, is a membrane-anchored proteoglycan that binds TGF-beta via its core protein. Deletion mutagenesis analysis has revealed two regions of betaglycan ectodomain capable of binding TGF-beta: one at the amino-terminal half, the endoglin-related region (Lopez-Casillas, F., Payne, H., Andres, J. L., and Massague, J. (1994) J. Cell Biol. 124, 557-568), and the other at the carboxyl-terminal half, the uromodulin-related region (Pepin, M.-C., Beauchemin, M., Plamondon, J., and O'Connor-McCourt, M. D. (1994) Proc. Natl. Acad. Sci. U. S. A 91, 6997-7001). In the present work we have functionally characterized these ligand binding regions. Similar to the wild type receptor, both regions bind TGF-beta2 with higher affinity than TGF-beta1, However, only the endoglin-related region increases the TGF-beta2 labeling of the TGF-beta type II receptor, the so-called "TGF-beta -presentation" function of the wild type receptor. Despite this preference, both regions as well as the wild type receptor mediate the TGF-beta2-dependent Smad2 phosphorylation, indicating that they can function indistinguishably as TGF-beta -enhancing coreceptors, On the other hand, we found that the recently described ability of the wild type betaglycan to bind inhibin A is a property of the core protein that resides in the uromodulin-related region, Binding competition experiments indicate that this region binds inhibin and TGF-beta with the following relative affinities: TGF-beta2 > inhibin A > TGF-beta1. All together, the present results suggest that betaglycan ectodomain is endowed with two bona fide independent ligand binding domains that can perform specialized functions as co-receptors of distinct members of the TGF-beta superfamily MH - Japan MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 40 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000168528800010 L2 - TGF-BETA; III RECEPTOR; PROTEOGLYCAN BETAGLYCAN; MEMBRANE PROTEOGLYCAN; ENDOTHELIAL-CELLS; ATTACHMENT SITES; I RECEPTOR; EXPRESSION; DOMAIN; PHOSPHORYLATION SO - Journal of Biological Chemistry 2001 ;276(18):14588-14596 2856 UI - 12752 AU - Esparza G AU - Dejong TM AU - Weinbaum SA AU - Klein I AD - Univ Calif Davis, Dept Pomol, Davis, CA 95616, USAUniv Autonoma Chapingo, CRUCEN, Zacatecas 98000, MexicoAgr Res Org, Volcani Ctr, Inst Hort, IL-50250 Bet Dagan, IsraelEsparza, G, Univ Calif Davis, Dept Pomol, Davis, CA 95616, USA TI - Effects of irrigation deprivation during the harvest period on yield determinants in mature almond trees AB - Effects of irrigation deprivation during the harvest period on yield determinants in mature almond (Prunus dulcis (Mill.) D.A. Webb cv. Nonpareil) trees were investigated during a 3-year field experiment. Return bloom and fruit set were measured on 2185 individually tagged spurs. Water stress resulting from irrigation deprivation during the harvest period, which purportedly coincides with the time of flower initiation, had no effect on the percentage of spurs that flowered or set fruit during subsequent years. Although water stress had no apparent effect on spur mortality, 66% of the tagged spurs died within 3 years. In addition, many spurs were vegetative by the third year, indicating the importance of spur renewal for sustained fruit production. Reductions in nut yield were evident after two successive years of irrigation deprivation during the harvest period. Regression analysis indicated a loss in yield of 7.7 kg tree(-1) in response to each 1 MPa decrease in stem water potential below -1.2 MPa during the previous seasons. The number of fruiting positions per tree (estimated indirectly for whole trees based on weight of current-year shoots > 5 cm in length) was negatively associated with water stress. Yield reduction in response to water stress during harvest appears to be a compound, multiyear effect, associated with reduced annual growth and renewal of fruiting positions MH - Israel MH - Mexico|Zacatecas MH - USA PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 8 U4 - Forestry U5 - J;Article AV - English IS - 0829-318X UR - ISI:000171210500007 L2 - crop yield;fruit set;Prunus dulcis;water stress;VEGETATIVE GROWTH; FRUIT; RESPONSES; FRENCH; PRUNE SO - Tree Physiology 2001 ;21(14):1073-1079 2857 UI - 12753 AU - Esparza G AU - Dejong TM AU - Weinbaum SA AD - Univ Calif Davis, Dept Pomol, Davis, CA 95616, USAUniv Autonoma Chapingo, CRUCEN, Zacatecas 98000, MexicoEsparza, G, Univ Calif Davis, Dept Pomol, Davis, CA 95616, USA TI - Effects of irrigation deprivation during the harvest period on nonstructural carbohydrate and nitrogen contents of dormant, mature almond trees AB - Effect of irrigation deprivation during the harvest period on the nonstructural carbohydrate (NC) content of dormant, mature, field-grown almond (Prunus dulcis (NEU.) D.A. Webb cv. Nonpareil) trees was studied. Roots, trunk, branches, spurs and stems of 12 trees were subsampled in February 1997, across a gradient of irrigation treatments (FI = fully irrigated, MS = moderately stressed and SS = severely stressed) to relate NC concentration to the degree of water stress experienced by individual trees during the previous (1996) harvest period. To assess the effect of water stress on whole-tree NC content, three dormant FI trees and three dormant SS trees were excavated on December 10, 1997, and dry weights and NC and N concentrations of the tree components were determined. Whole-tree biomass did not differ significantly between FI and SS trees, although SS trees tended to have less total dry weight. Although roots constituted just 13% of tree biomass, they stored 36 and 44% of tree NC and N contents, respectively. There were negative relationships between the seasonal minimum values of both midday (psi (ms)) and predawn (psi (pd)) stem water potentials during the harvest period and root NC content of dormant trees. Severe water stress during the harvest period resulted in a 26% reduction in NC content and a 50% reduction in biomass of current-year stems (> 5 cm in length) per tree. The reduction in NC content is consistent with the previously reported late season reductions in leaf function and persistence. The SS trees exhibited a reduction in NC content but not in N content per tree, indicating that late season accumulation of NC and N were uncoupled in trees subjected to severe harvest-period water stress MH - Mexico|Zacatecas MH - USA PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 7 U4 - Forestry U5 - J;Article AV - English IS - 0829-318X UR - ISI:000171210500008 L2 - Prunus dulcis;reserves;water stress;PISTACHIO TREES; WALNUT TREES; PRUNE TREES; RESERVES; STORAGE; PHOSPHORUS; FERTILIZER; POTASSIUM; NITRATE; AMMONIA SO - Tree Physiology 2001 ;21(14):1081-1086 2858 UI - 12846 AU - Espinasa L AU - Borowsky RB AD - Univ Autonoma Estado Morelos, CEAMISH, Cuernavaca 62210, Morelos, MexicoNYU, Dept Biol, New York, NY 10003, USAEspinasa, L, Univ Autonoma Estado Morelos, CEAMISH, Ave Univ 1001,Colonia Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Origins and relationship of cave populations of the blind Mexican tetra, Astyanax fasciatus, in the Sierra de El Abra AB - The blind morph of Astyanax fasciatus (Pisces: Characidae) has been more thoroughly studied than any other cave inhabiting organism. Most studies of A. fasciatus have used individuals from different caves of the Sierra de El Abra, Mexico, and have assumed that each population independently evolved to live in the cave environment. We analyzed the relationships among several cave populations that delineate the Sierra de El Abra using RAPD markers. The results indicate that all cave populations are more closely related to one another than they are to the surface populations. This suggests that present day cave populations derived from a common ancestral stock, most likely due to a single colonization event, or alternatively, that strong gene flow among cave populations has occurred, raising precaution against considering each cave population as independent MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 13 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000170993700019 L2 - troglobite;RAPD;AP-PCR;cave colonization;ARBITRARY PRIMERS; AP-PCR; CHARACIDAE; PISCES SO - Environmental Biology of Fishes 2001 ;62(1-3):233-237 2859 UI - 12565 AU - Espinosa-de-los-Monteros J AU - Martinez A AU - Valle F AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62271, Morelos, MexicoUNIDA, Inst Tecnol Veracruz, Veracruz 91860, MexicoGenencor Int Inc, Palo Alto, CA 94304, USAMartinez, A, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, AP 510-3, Cuernavaca 62271, Morelos, Mexico TI - Metabolic profiles and aprE expression in anaerobic cultures of Bacillus subtilis using nitrate as terminal electron acceptor AB - Cultures using nitrate as the terminal electron acceptor were conducted in Schaeffer's medium to evaluate the growth performance and metabolic profiles of Bacillus subtilis, and its potential to express the aprE (subtilisin) gene under anoxic conditions. Nitrate was converted to ammonia through nitrite reduction; and different product profiles were observed during the growth phase when nitrate was added at various concentrations (4-24 mM) to Schaeffer's medium containing glucose (4 g l(-1)). If nitrate was not limiting, then acetic acid and acetoin were accumulated, suggesting a limitation of reduced cofactors but, if nitrate became limiting, then lactic acid and butanediol were accumulated, suggesting an excess of reduced cofactors. Due to a strong lysis at the onset of the end of the growth phase, sporulation frequency and aprE expression were negligible in anaerobic batch cultures. Fed-batch fermentation allowed the development of a stationary phase through a continuous supply of glucose and nitrate. In this case, sporulation frequency was almost null, but interestingly aprE expression was similar to that found in aerobic cultures MH - Mexico|Morelos MH - Mexico|Veracruz MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000171819700018 L2 - BETA-GALACTOSIDASE; ESCHERICHIA-COLI; GROWTH SO - Applied Microbiology and Biotechnology 2001 ;57(3):379-384 2860 UI - 12849 AU - Espinosa-Solares T AU - Brito-De la Fuente E AU - Tecante A AU - Tanguy PA AD - Autonomous Univ Chapingo UACh, Dept Agroind Engn, Chapingo 56230, Edo De Mexico, MexicoNatl Autonomous Univ Mexico, Food Sci & Biotechnol Dept, Chem Fac E, Mexico City 04510, DF, MexicoEcole Polytech, NSERC Paprican Chair, Montreal, PQ H3C 3A7, CanadaEcole Polytech, URPEI, Dept Chem Engn, Montreal, PQ H3C 3A7, CanadaEspinosa-Solares, T, Autonomous Univ Chapingo UACh, Dept Agroind Engn, POB 161, Chapingo 56230, Edo De Mexico, Mexico TI - Flow patterns in rheologically evolving model fluids produced by hybrid dual mixing systems AB - The flow patterns produced by two dual mixing systems composed of independently driven impellers were studied. The dual impellers included a turbine rotating at high speed (Rushton or Smith) and a slowly rotating helical ribbon agitator (HR). Visualizations and power input were used to evaluate mixing performance. The influence of the rotational speed ratio on the flow patterns was evaluated. For high shear-thinning fluids, N-T/N-HR modifies the flow patterns considerably. Three typical behaviors were found with shear thinning fluids: segregation of two principal flow patterns (N-T/N-HR < 10), turbine dominance (N-T/N-HR > 10), and a well-distributed flow pattern throughout the tank (N-T/N-HR = 10). For low-viscosity fluids, the motionless HR reduced the vortex length and the T-HR systems eliminated vortex when the impellers rotated in opposite directions at N-T/N-HR = 10. Finally, a relationship between the dimensionless vortex length and the Froude number is proposed for individual turbines as well as for the turbine-motionless HR systems MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0930-7516 UR - ISI:000171103800009 L2 - HELICAL RIBBON IMPELLERS; POWER-CONSUMPTION; LIQUID SO - Chemical Engineering & Technology 2001 ;24(9):913-918 2861 UI - 13654 AU - Espinosa B AU - Zenteno R AU - Mena R AU - Robitaille Y AU - Zenteno E AU - Guevara J AD - Inst Nacl Neurol, Dept Neuropatol, Mexico City 14269, DF, MexicoInst Nacl Enfermedades Resp, Dept Bioquim, Mexico City, DF, MexicoCINVESTAV, Dept Fisiol Biofis & Neurociencias, Mexico City 14000, DF, MexicoInst Geriatrie Montreal, Dept Neuropathol, Montreal, PQ, CanadaUNAM, Fac Med, Dept Bioquim, Lab Inmunol, Mexico City, DF, MexicoGuevara, J, Inst Nacl Neurol, Dept Neuropatol, Insurgentes 3877,La Fama, Mexico City 14269, DF, Mexico TI - O-glycosylation in sprouting neurons in Alzheimer disease, indicating reactive plasticity AB - Reactive plasticity, including axonal and dendritic sprouting and reactive synaptogenesis. has been proposed to contribute to the pathogenesis of several neurological disorders. This work was aimed at identifying the possible role of protein glycosylation in the brain from patients with Alzheimer disease (AD), using lectin histochemistry, as determinants of reactive plasticity. Results indicate an increase in the production of cryptic O-glycosidically linked proteins (NeuAc alpha2,6 Gal beta1,3GalNA alpha1.0 Ser/Thr or sialyl-T-antigen) in neuritic sprouting in AD brains as determined by positive labeling with Amaranthus leucocarpus (ALL, T-antigen-specific) and Macrobrachium rosenbergii (MRL, specific for NeuAc5,9Ac(2)) lectins. Immunohistochemistry indicated that lectin staining was specific for the synaptic sprouting process (megancurites) in AD. These results were confirmed using anti-synaptophysin and anti-GAP 43 antibodies, which recognized megancurites and dystrophic neurites around amyloid-beta deposits. In normal control brains, labeling with the aforementioned lectins was restricted to microvessels. Control experiments with neurarninidase-treated brain samples revealed positivity to the lectin front Arachis hypogaea (PNA), which is specific fur galactose. Our results suggest specific O-glycosylation patterns of proteins closely related to neuronal plasticity in AD MH - Canada MH - Mexico|Distrito Federal PB - LAWRENCE: AMER ASSN NEUROPATHOLOGISTS INC RP - NOT IN FILE U3 - TC 12 U4 - Clinical Neurology;Neurosciences;Pathology U5 - J;Article AV - English IS - 0022-3069 UR - ISI:000168786800005 L2 - Alzheimer disease;lectins;O-glycosylation;sialic acid;specific lectins;sprouting neurons;T antigen;AMARANTHUS-LEUCOCARPUS LECTIN; TAU-PROTEIN; HUMAN-BRAIN; GAP-43; PURIFICATION; DEMENTIA; LESIONS; LOCALIZATION; RECOGNITION; SPECIFICITY SO - Journal of Neuropathology and Experimental Neurology 2001 ;60(5):441-448 2862 UI - 13413 AU - Espinosa G AU - Silva RJ AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Lawrence Livermore Natl Lab, Livermore, CA 94550, USAEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Alpha-particle analysis of a triple isotope Pu-239-Am-241-Cm-244 source by nuclear track methodology AB - This work presents a new approach using nuclear track in solids methodology (NTSM) for the energy analysis of alpha-particles. This method is based on the quantitative relationship between the energy deposited in the polycarbonate by the geometrical parameters of the developed track after the chemical etching. We used separated calibrated sources of Pu-239 and Am-241 and a mixed source with Pu-239, Am-241 and Cm-244. CR-39 polycarbonate manufactured by Landauer Inc.(R) was selected as the detector material, because of its excellent response to these energies. The chemical etching was done in two steps: (a) pre-etching to avoid the irregularities on the surface of the material, and (b) chemical etching to develop the track. In both processes the temperature and pH of the solution need to be very controlled. The geometrical characteristics of the formed tracks were analyzed automatically by Digital Image System. The results show a distribution of track diameters as a function of the energies analyzed analogous to the pulses produced on the conventional electronic detection system MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000169444600012 L2 - DETECTOR SO - Journal of Radioanalytical and Nuclear Chemistry 2001 ;248(3):575-578 2863 UI - 13414 AU - Espinosa G AU - Silva RJ AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Lawrence Livermore Natl Lab, Livermore, CA 94550, USAEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Mapping of transuranic elements in soil by unclear track methodology AB - This work presents an alternative method to map the distribution of transuranic elements, which is characterized by its simplicity in both implementation and instrumentation. The method is based on the interaction of alpha particles in polymeric materials and the formation of tracks, which become visible after chemical etching. Nuclear track detectors are placed on the soil in order to evaluate the distribution of the radioactive material and its relative intensity for transuranic contaminants. CR-39 polycarbonate was used as a nuclear track detector in this study. Chemical etching was done with a 6.25M KOH solution in a closed system for 16 hours. The readings were performed in an automatic system using digital image analysis. The results show the distribution of the contaminants and their location, identifying the zones with large intensities. This method is attractive for use in areas contaminated with alpha particles, and specially transuranic elements, because it involves in situ measurements, generates very low amounts of radioactive waste, and the detectors are easily handled MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000169444600013 L2 - CR-39 SO - Journal of Radioanalytical and Nuclear Chemistry 2001 ;248(3):579-582 2864 UI - 13328 AU - Espresate J AU - Lissauer JJ AD - Inst Astron, Mexico City 04510, DF, MexicoNASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035, USAEspresate, J, Inst Astron, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Resonant satellite torques on low optical depth particulate disks - II. Numerical simulations AB - This paper presents the results of numerical simulations of collisionless and collisional annuli of test particles centered at the 2: 1 inner Lindblad resonance of a small satellite. We discuss the role of the physical width W ' (around the resonance) in the value of the initial transient torque for both collisionless and collisional systems. We demonstrate analytically as well as numerically that the torque over the collisionless particulate annuli (before the problem becomes nonlinear) is a function that depends exclusively on the product W 't ', where t ' is the time. For the collisional case, the secular torque after the first transient depends on both the mean time between collisions, t ' (coll), and the physical width of the annulus. Under certain restrictions on the value of t ' (coll), the secular torque for t ' > t ' (coll) depends exclusively on the product W 't ' (coll), in the same form as for the collisionless case. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0019-1035 UR - ISI:000169825200003 L2 - planetary rings;resonances;planetesimals;RINGS SO - Icarus 2001 ;152(1):29-47 2865 UI - 13606 AU - Esteller MV AU - Morell I AU - Almeida C AD - Univ Autonoma Estado Mexico, Fac Engn, Interamer Ctr Water Resources, Toluca 50130, MexicoUniv Jaume I, Dept Expt Sci, Castellon, SpainUniv Lisbon, Fac Sci, Dept Geol, P-1700 Lisbon, PortugalEsteller, MV, Univ Autonoma Estado Mexico, Fac Engn, Interamer Ctr Water Resources, Cerro Coatepec S-N CU, Toluca 50130, Mexico TI - Physico-chemical processes in a vadose zone during the infiltration of treated wastewater used for irrigation: application of the NETPATH model AB - Irrigation with treated wastewater was carried out in an experimental site in Castellon (eastern part of Spain). By using water soil samplers at different depths some physico-chemical parameters (conductivity, pH, major ions, nitrogen species, BOD, COD, and organic matter) were controlled to identify the processes affecting the self-cleaning power of the vadose zone. Modeling of these processes has been carried out by means of the NET-PATH software. Two intervals have been considered, the first one from 15 to 180 cm in depth and the second one from 180 to 240 cm, in which ionic exchange processes affecting Na+, Ca2+, Mg2+, and K+, calcite precipitation, and dolomite and gypsum dissolution are active. The main differences between the intervals are modifications of CO2 interchange and the behavior of sodium. As a result of the synergic effect of different processes involved there is a good level of purification MH - Mexico|Estado De Mexico MH - Portugal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000168922400015 L2 - wastewater;irrigation;vadose zone;pollution;modeling;EXPERIMENTAL CITRUS GROVE; WATER; SOIL; ATRAZINE; PESTICIDES; SORPTION SO - Environmental Geology 2001 ;40(7):923-930 2866 UI - 13652 AU - Esteves PM AU - Ramirez-Solis A AU - Mota CJA AD - Univ Fed Rio de Janeiro, Dept Quim Organ, Inst Quim, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoMota, CJA, Univ Fed Rio de Janeiro, Dept Quim Organ, Inst Quim, Cidade Univ CT Bloco A, BR-21949900 Rio De Janeiro, Brazil TI - DFT calculations on the protonation of alkanes on HF/SbF5 superacids using cluster models AB - Calculations at B3LYP/6-31++G** + RECP (Sb) level have been performed for the protonation of C-H and C-C bonds of methane, ethane, propane, and isobutane by models of the liquid superacid media HF/SbF5. The antimony atoms were dealt with by relativistic effective core potentials. The species H2F+. Sb2F11- was considered as the model electrophile. The transition states for the protonation of the C-H bonds (H/H exchange) are similar to an H-carbonium ion interacting with the anion moiety. The enthalpies of activation for WH exchange of alkanes were calculated in the range of 19 to 21 kcal/mol. For the protonation of the C-C bond, the enthalpy of activation strongly depends on the structure of the hydrocarbon being attacked, and was always higher than the enthalpy of activation for H/H exchange. This suggests the existence of steric demand for the C-C protonation MH - Brazil MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000168803800042 L2 - THEORETICAL AB-INITIO; ELECTROPHILIC REACTIONS; MOLECULAR-STRUCTURES; DEUTERIUM EXCHANGE; CH5+; DIFFRACTION; CATIONS; SYSTEM; STORY SO - Journal of Physical Chemistry B 2001 ;105(19):4331-4336 2867 UI - 13797 AU - Esteves PM AU - Alberto GGP AU - Ramirez-Solis A AU - Mota CJA AD - Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Organ, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoMota, CJA, Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Organ, Cidade Univ CT Bloco A, BR-21949900 Rio De Janeiro, Brazil TI - Ab initio study of the adamantonium cations: the protonated adamantane AB - The molecular structure and energetics of the adamantonium ions were computed at the MP2(full)/6-31G** level. Three structures were found to represent the adamantonium cations, respectively: the 1-H-adamantonium (1). 2-H-adamantonium (2), and C-adamantonium ions (3). This study revealed that, upon protonation, adamantane can also produce two van der Waals complexes: one formed by the weak interaction of the 1-adamantyl cation and H-2 (4) and the other formed by the interaction of the 2-adamantyl cation and H-2 (5). The stability order is predicted to be 5 > 3 > 4 > 1 > 2, Given the size and complexity of this molecule, the quantum zero point energy (ZPE) and finite temperature (298 K) corrections were estimated from previously calculated values for the isobutonium (for protonation of tertiary C-H and C-C bonds) and the proponium cations (for protonation of the secondary C-H bond). The calculated proton affinity of adamantane was estimated as 175.7 kcal/mol MH - Brazil MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000168441800019 L2 - HYDROGEN-DEUTERIUM EXCHANGE; POTENTIAL-ENERGY SURFACE; PROTOLYSIS DEUTEROLYSIS; ELECTROPHILIC REACTIONS; SINGLE BONDS; SUPERACIDS; MECHANISM; ALKANES SO - Journal of Physical Chemistry A 2001 ;105(17):4308-4311 2868 UI - 13423 AU - Estevez JM AU - Cantero A AU - Reindl A AU - Reichler S AU - Leon P AD - Univ Nacl Autonoma Mexico, Dept Biol Mol Plantas, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoBASF AG, Crop Prot Res, D-67056 Ludwigshafen, GermanyLeon, P, Univ Nacl Autonoma Mexico, Dept Biol Mol Plantas, Inst Biotecnol, Avenida Univ 2001 Chamilpa,Apartado Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - 1-deoxy-D-xylulose-5-phosphate synthase, a limiting enzyme for plastidic isoprenoid biosynthesis in plants AB - The initial step of the plastidic 2C-methyl-D-erythritol 4-phosphate (MEP) pathway that produces isopentenyl diphosphate is catalyzed by 1-deoxy-D-xylulose-5-phosphate synthase. To investigate whether or not 1-deoxy-D-xylulose-5-phosphate synthase catalyzes a limiting step in the MEP pathway in plants, we produced transgenic Arabidopsis plants that over- or underexpress this enzyme. Compared with non-transgenic wild-type plants, the transgenic plants accumulate different levels of various isoprenoids such as chlorophylls, tocopherols, carotenoids, abscisic acid, and gibberellins. Phenotypically, the transgenic plants had slight alterations in growth and germination rates. Because the levels of several plastidic isoprenoids correlate with changes in 1-deoxy-D-xylulose-5-phosphate synthase levels, we conclude that this enzyme catalyzes one of the rate-limiting steps of the MEP biosynthetic pathway. Furthermore, since the product of the MEP pathway is isopentenyl diphosphate, our results suggest that in plastids the pool of isopentenyl diphosphate is limiting to isprenoid production MH - Germany MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 88 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000169412700123 L2 - MEVALONATE-INDEPENDENT PATHWAY; 1-DEOXYXYLULOSE 5-PHOSPHATE SYNTHASE; TRANSGENIC TOMATO PLANTS; ISOPENTENYL DIPHOSPHATE; ARABIDOPSIS-THALIANA; SYNECHOCOCCUS-LEOPOLIENSIS; GIBBERELLIN BIOSYNTHESIS; CAROTENOID BIOSYNTHESIS; HETEROLOGOUS EXPRESSION; TERPENOID BIOSYNTHESIS SO - Journal of Biological Chemistry 2001 ;276(25):22901-22909 2869 UI - 14103 AU - Estrada-Flores S AU - Cleland AC AU - Cleland DJ AD - UNAM, Ctr Inv Teor, FESC, Mexico City 54740, DF, MexicoMassey Univ, Dept Food Technol, Palmerston North, New ZealandMassey Univ, Dept Proc & Environm Technol, Palmerston North, New ZealandEstrada-Flores, S, UNAM, Ctr Inv Teor, FESC, C-1,Ed El,Pta Baja Av 1 Mayo S-N, Mexico City 54740, DF, Mexico TI - Prediction of the dynamic thermal behaviour of walls for refrigerated rooms using lumped and distributed parameter models AB - Physically realistic lumped and distributed parameter models were used to represent one-dimensional heat conduction through the layers of solid conducting walls in low temperature applications. A range of feasible models with differing complexity for representing the thermal resistance of thermal capacitance each of concrete, concrete-insulation-concrete and concrete-insulation-metal type walls was investigated by comparison of simulated dynamic behaviour to predictions by a finite element model programme, which was itself validated by comparison to experimental data for wall systems. Model evaluation measures to aid engineering judgement in selecting appropriate wall models for particular applications are presented. Only resistance needs to be considered for accurate prediction of mean heat flux entering a room, regardless of the wall modelled. It is recommended that metal layers be represented by capacity only models, thin insulation layers by resistance only models, thicker insulation layers by lumped or fully distributed models, and concrete layers by lumped or fully distributed models. The recommended number of zones for a lumped model is twice the number used in a distributed model. An eyen distribution, of thermal resistance and capacity between zones in lumped parameter models is recommended. (C) 2001 Elsevier Science Ltd and IIR. All rights reserved MH - Mexico|Distrito Federal MH - New Zealand PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Engineering, Mechanical U5 - J;Article AV - English IS - 0140-7007 UR - ISI:000167518300008 L2 - heat transfer;insulant;wall;composite;modelling;process SO - International Journal of Refrigeration-Revue Internationale du Froid 2001 ;24(3):272-284 2870 UI - 13212 AU - Estrada-Torres A AU - Lado C AU - Rodriguez-Palma M AD - CSIC, Real Jardin Bot, E-28014 Madrid, SpainUniv Autonoma Tlaxcala, Ctr Invest Ciencias Biol, Tlaxcala 90000, MexicoLado, C, CSIC, Real Jardin Bot, Plaza Murillo 2, E-28014 Madrid, Spain TI - Two new species of Myxomycetes from a tropical deciduous forest of Mexico AB - Two new myxomycete species recorded from the semiarid lands of the Neotropics are described. Crihraria fragilis sp. nov. is distinguished from all other species of the genus by its unique spores, which have smooth bands arranged in longitudinal arcs, and by the minute sporocarps each with a deep calyculus and without a peridial net. Diderma acanthosporum sp. nov. has a unique combination of characters; these are a pseudoaethalioid fructification with stalked sporocarps and depressed sporothecae, a calcareous, crustose external peridial layer, and large spores, paler on one side and with long spines. Comments on the distribution and ecology of these two species are included MH - Mexico|Tlaxcala MH - Spain PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000170100100014 L2 - Cribraria;Diderma;SEM;Stenocereus;succulenticolous myxomycetes;taxonomy;DIDYMIUM SO - Mycologia 2001 ;93(4):744-750 2871 UI - 12517 AU - Estrada M AU - Cerdeira A AU - Leyva A AU - Carreno MNP AU - Pereyra I AD - IPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City 07300, DF, MexicoUniv Sao Paulo, Microelect Lab, Sao Paulo, BrazilCtr Appl Studies Nucl Dev, Havana, CubaEstrada, M, IPN, CINVESTAV, Dept Ingn Elect, SEES, Av IPN 2508,Apdo Postal 14-740, Mexico City 07300, DF, Mexico TI - Optimization of the i-layer width of Cr-a-Si : H PIN X-ray detectors AB - The influence of increasing the i-layer width of thick PIN a-Si:H diodes on the efficiency of X-ray detectors is analyzed. It is demonstrated that increasing the i-layer width to increase the interaction probability of the X-rays with the detector requires higher bias to achieve satisfactory collection efficiency. This higher bias produces, at the same time, an increase in the dark current that substantially decreases the overall detection efficiency. The use of complementary metal conversion layers is discussed and recommended and a Cr-a-Si:H PIN X-ray detector is fabricated and characterized. Experimental results are presented to validate expected behavior and recommended approach to increase the overall efficiency. (C) 2001 Elsevier Science BY. All rights reserved MH - Brazil MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000171742900035 L2 - PIN a-Si : H detectors;response to radiation;X-ray detection efficiency;AMORPHOUS-SILICON; N-DIODES SO - Thin Solid Films 2001 ;396(1-2):235-239 2872 UI - 13820 AU - Estrada M AU - Cerdeira A AU - Ortiz-Conde A AU - Garcia F AD - IPN, CINVESTAV, Secc Elect Estado Solido, Dept Ingn Elect, Mexico City 07300, DF, MexicoUniv Simon Bolivar, Lab Elect Estado Solido, Caracas 1080A, VenezuelaEstrada, M, IPN, CINVESTAV, Secc Elect Estado Solido, Dept Ingn Elect, Av IPN 2508,Apto 14-740, Mexico City 07300, DF, Mexico TI - Determination of trap cross-section in a-Si : H p-i-n diodes parameters using simulation and parameter extraction AB - Modeling the current density-voltage (J-V) curve of a-Si:H p-i-n diodes requires a group of input physical parameters that have to be previously determined. Some of them can be determined directly from experiment, while others. as the trap cross-section, have to be indirectly determined or assigned. We prc:sent a simple procedure to estimate trap cross-section using computer simulation and parameter extraction. The experimental J-V forward characteristic of the p-i-n diode, dark and illuminated, is used to determine the ideality factor n and the short circuit current density J(SC). The charged trap cross-section and its relation to the neutral trap cross-section are determined by fitting to tabulated and graphical results from simulation. Determined values of trap cross-section are used to simulate the reverse current of diodes under illumination and results compared with experimental curves. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 0026-2714 UR - ISI:000168289900016 L2 - AMORPHOUS-SILICON; SOLAR-CELLS SO - Microelectronics Reliability 2001 ;41(4):605-610 2873 UI - 14364 AU - Estrada MB AU - Malabre M AD - Inst Politecn Nacl, CINVESTAV, Dept Automat Control, Mexico City 07000, DF, MexicoIRCCyN, CNRS UMR 6597, F-44321 Nantes 03, FranceEstrada, MB, Inst Politecn Nacl, CINVESTAV, Dept Automat Control, AP 14-740, Mexico City 07000, DF, Mexico TI - Structural conditions for disturbance decoupling with stability using proportional and derivative control laws AB - In this paper, we consider the disturbance decoupling problem with internal stability by means of generalized control laws which use not only state feedback, but also external terms coming from the disturbance and some of its time derivatives. We derive from our previous geometric condition an equivalent one in terms of some structures of the system to be controlled (zeros at infinity and unstable zeros), and no longer dependent on a particular approach (geometric, algebraic,...) MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000166732000021 L2 - disturbance rejection;geometric approach;linear systems;structural approach;SYSTEMS SO - Ieee Transactions on Automatic Control 2001 ;46(1):160-165 2874 UI - 14429 AU - Etges WJ AU - Armella MA AU - O'Grady PM AU - Heed WB AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Mexico City 09340, DF, MexicoAmer Museum Nat Hist, Dept Entomol, New York, NY 10024, USAUniv Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAEtges, WJ, Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Av Michoacan & Purisma,Col Vicentina, Mexico City 09340, DF, Mexico TI - Two new species of Drosophila (Diptera : Drosophilidae) in the repleta group from Mexico AB - Two new species, Drosophila huckinsi Etges & Heed and D. huichole Etges & Heed From Mexico are described and compared with close relatives in the D. longicornis cluster of the large D. repleta group in the subgenus Drosophila MH - Mexico|Distrito Federal MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000166695800003 L2 - Drosophila;Mexico;cactus;systematics SO - Annals of the Entomological Society of America 2001 ;94(1):16-20 2875 UI - 12895 AU - Ettinger AS AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Hernandez-Cadena L AU - Gonzalez-Cossio T AU - Peterson KE AU - Amarasiriwardena C AU - Hu H AD - Harvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAInst Nacl Salud Publ, Ctr Invest Salud Problac, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USA TI - Determinants of lead in breast milk at one-month postpartum among lactating women in Mexico City MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500193 SO - Epidemiology 2001 ;12(4):S45-S45 2876 UI - 12896 AU - Ettinger AS AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Hernandez-Cadena L AU - Gonzalez-Cossio T AU - Peterson KE AU - Amarasiriwardena C AU - Hu H AD - Harvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAInst Nacl Salud Publ, Ctr Invest Salud Problac, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USA TI - Determinants of blood lead levels at one month of age among exclusively and partially breastfed children in Mexico City MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500194 SO - Epidemiology 2001 ;12(4):S46-S46 2877 UI - 14343 AU - Fahey DW AU - Gao RS AU - Carslaw KS AU - Kettleborough J AU - Popp PJ AU - Northway MJ AU - Holecek JC AU - Ciciora SC AU - McLaughlin RJ AU - Thompson TL AU - Winkler RH AU - Baumgardner DG AU - Gandrud B AU - Wennberg PO AU - Dhaniyala S AU - McKinney K AU - Peter T AU - Salawitch RJ AU - Bui TP AU - Elkins JW AU - Webster CR AU - Atlas EL AU - Jost H AU - Wilson JC AU - Herman RL AU - Kleinbohl A AU - von Konig M AD - NOAA, Aeron Lab, Boulder, CO 80305, USANOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80305, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAUniv Leeds, Sch Environm, Leeds LS2 9JT, W Yorkshire, EnglandRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80307, USACALTECH, Div Engn & Appl Sci, Pasadena, CA 91125, USAETH Zurich, Lab Atmospharenphys, CH-8093 Zurich, SwitzerlandNASA, Jet Prop Lab, Pasadena, CA 91109, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USABay Area Environm Res Inst, San Francisco, CA 94122, USAUniv Denver, Dept Engn, Denver, CO 80208, USAUniv Bremen, Inst Environm Phys, D-28334 Bremen, GermanyFahey, DW, NOAA, Aeron Lab, Boulder, CO 80305, USA TI - The detection of large HNO3-containing particles in the winter arctic stratosphere AB - Large particles containing nitric acid (HNO3) were observed in the 1999/2000 Arctic winter stratosphere. These in situ observations were made over a Large altitude range (16 to 21 kilometers) and horizontal extent (1800 kilometers) on several airborne sampling flights during a period of several weeks. With diameters of 10 to 20 micrometers, these sedimenting particles have significant potential to denitrify the Lower stratosphere. A microphysical model of nitric acid trihydrate particles is able to simulate the growth and sedimentation of these Large sites in the Lower stratosphere, but the nucleation process is not yet known. Accurate modeling of the formation of these Large particles is essential for understanding Arctic denitrification and predicting future Arctic ozone abundances MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 146 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000166860100041 L2 - POLAR STRATOSPHERES; OZONE DEPLETION; NITRIC-ACID; WATER-VAPOR; DENITRIFICATION; CLOUD; AEROSOL; HNO3; CONDENSATION; NUCLEI SO - Science 2001 ;291(5506):1026-1031 2878 UI - 13207 AU - Falkenberg G AU - Johnson RL AU - Takeuchi N AD - Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoFalkenberg, G, Univ Hamburg, Inst Expt Phys 2, Luruper Chaussee 149, D-22761 Hamburg, Germany TI - Scanning tunneling microscopy and ab initio calculations: c(4X8) reconstructions of Pb on Si and Ge(001) AB - The c(4x8) reconstructions induced by Pb atoms on Si(001) and Ge(001) surfaces have been studied by scanning tunneling microscopy (STM) and first-principles total-energy calculations. Two different structures were found experimentally. In both cases, there is a coexistence of Pb and Si(Ge) dimers either in perpendicular and/or in parallel orientations. The c(4x8)-alpha phase is similar to the structure previously reported for Pb on Si and Ge(001) and Sn on Si(001). It is formed by three rows of asymmetric Pb dimers forming chains along the [110] direction, and it corresponds to a coverage of 0.75 monolayer (ML). In the second structure, the c(4x8)-1 phase, the middle Pb dimers are replaced by Si(Ge) dimers resulting in a Pb coverage of 0.5 ML. The agreement between bias-dependent STM images and calculated local density of states for the two structures is excellent. Our calculations show that the c(4x8)-alpha structure is generally the most stable configuration for Si and Ge surfaces covered by Pb. However, if there is a deficit of Pb atoms, the c(4x8)-1 structure becomes more stable for Pb on Si(001) MH - Germany MH - Mexico|Baja California PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000169989800055 L2 - SURFACE SUPERSTRUCTURES; PB/SI(001) SYSTEM; PB/GE(001) SYSTEM; PHASES; SI(100); ADSORPTION; GE(111); STM; AL; GA SO - Physical Review B 2001 ;6403(3):art-035304 2879 UI - 12516 AU - Fall C AU - Chavarie C AU - Chaouki J AD - Univ Autonoma Estado Mexico, Ctr Interamer Recursos Agua, Toluca 50091, Estado Mexico, MexicoEcole Polytech, BIOPRO Res Ctr, Dept Chem Engn, Montreal, PQ H3C 3A7, CanadaFall, C, Univ Autonoma Estado Mexico, Ctr Interamer Recursos Agua, Apartado Postal 367, Toluca 50091, Estado Mexico, Mexico TI - Generalized model of pentachlorophenol distribution in amended soil-water systems AB - This paper describes laboratory experiments and subsequent statistical data analysis performed to reevaluate the overall effect of soil characteristics and liquid-phase composition on the extent of pentachlorophenol (PCP) adsorption in complex soil-water systems. The PCP adsorption isotherms were first generated for eight soils of varying physical and chemical properties. Binding tests were then performed in the presence of different additives (surfactant, oil, etc.) and conditions (temperature and pH), based on a fractional factorial design. Statistical analysis of data showed strong interdependencies, among several of the soil parameters, but confirmed that organic carbon content (f(oc)) and pH of the soils were the best predictors of the adsorption constant of PCP (K-d) for nonamended soil-water systems. It was determined that the effect on K-d of a 0.2 unit decrease in soil pH was approximately the same as increasing f(oc) by 1%. From studying the effect of the amendments, two interactions (surfactant-pH and surfactant-oil) and two primary effects (surfactant and oil) have been detected. The effectiveness of the surfactant in decreasing K-d varied depending on the pH and oil content of the soil. A generalized nonlinear model expressing K-d as a function of pH, f(oc), oil content of soil, and surfactant dose was developed for the range of conditions studied. The proposed model and modeling approach can be adapted to other types of contaminants or variables, for specific natural and engineered systems MH - Canada MH - Mexico|Estado De Mexico PB - ALEXANDRIA: WATER ENVIRONMENT FEDERATION RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Environmental;Environmental Sciences;Limnology;Water Resources U5 - J;Article AV - English IS - 1061-4303 UR - ISI:000171863200016 L2 - adsorption;multivariate analysis;oil;pentachlorophenol;soil parameters;surfactants;SORPTION; SURFACTANTS; PETROLEUM; PARTITION; PHASES SO - Water Environment Research 2001 ;73(1):110-117 2880 UI - 12497 AU - Farmer GL AU - Espinoza G AU - Morales M AU - Martin MW AU - Bowring SA AD - Univ Colorado, CIRES, Boulder, CO 80309, USAUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USAUniv Sonora, Dept Geol, Hermosillo, Sonora, MexicoMIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02319, USAFarmer, GL, Univ Colorado, CIRES, Campus Box 399, Boulder, CO 80309, USA TI - Nd isotope constraints on sources of Neoproterozoic to Early Cambrian siliciclastic sedimentary rocks in northern Sonora AB - The chemical and Nd isotopic compositions of 10 Neoproterozoic to Early Cambrian siltstones and sandstones from the Caborca area in northwestern Sonora, Mexico, were determined to assess the provenance of the original sediments and to compare the sources of correlative miogeoclinal sedimentary rocks in northern Mexico and in the southwest United States. The sandstones and siltstones generally have trace element characteristics typical of material eroded from upper continental crust, with the exception of volcaniclastic sandstones from Unit 1 of the early Cambrian Puerto Blanco Formation that lack negative Eu, Nb, Ta, and Ti anomalies. Measured epsilon (Nd) values vary from -22.1 to -4.2, with Nd model ages (T-DM) varying from 0.9-2.6 Ga. The least negative epsilon (Nd) values correspond to the chemically distinct sandstone samples from Unit I of the Puerto Blanco Formation. These data indicate that much of the siliciclastic detritus represented by the Neoproterozoic to Early Cambrian miogeocline in northern Sonora was derived from subjacent Paleoproterozoic crust of western North America. Despite the greater proximity of the Sonora portions of the Cordilleran miogeocline to 1.0-1.3 Ga Grenville crust relative to its northern portions, there is little Nd isotope evidence that the Grenville crust provided significant amounts of detritus to this portion of the miogeocline. Only Unit I of the Puerto Blanco has sufficiently high epsilon (Nd) values to represent detritus derived from Grenville crust, but the high epsilon (Nd) values can also be attributed to the presence of Cambrian-age volcaniclastic material within the original sediments that comprise this unit. The Nd isotope stratigraphy of the Carborca miogeoclinal rocks is similar to that of correlative sedimentary rocks in the southern Great Basin of the western United States, but more detailed isotopic and petrographic data will be necessary before it can be concluded that the Caborca block is allochthonous with respect to eastern portions of northern Mexico and has been tectonically transported to its current position along the Mojave-Sonora megashear. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Sonora MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000171888900002 L2 - sedimentary rocks;continental crust;geochemical variations;WESTERN UNITED-STATES; GREAT-BASIN; MEXICO; AMERICA; SR; EVOLUTION; REGION; ORIGIN; STRATA; CRUST SO - Journal of South American Earth Sciences 2001 ;14(5):437-446 2881 UI - 14106 AU - Favela J AU - Pena-Mora F AD - Ctr Invest Cient & Educ Super Ensenada, Collaborat Syst Lab, Mexico City, DF, MexicoMIT, Dept Civil & Environm Engn, Intelligent Engn Syst Grp, Cambridge, MA 02139, USAFavela, J, Ctr Invest Cient & Educ Super Ensenada, Collaborat Syst Lab, Mexico City, DF, Mexico TI - An experience in collaborative software engineering education AB - The authors developed a course to familiarize students with the challenges of coordinating team members developing large-scale systems. Based on the course experience, they describe an Internet-based groupware environment integrating a set of tools that support technical and administrative activities MH - Mexico|Distrito Federal MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Software Engineering U5 - J;Article AV - English IS - 0740-7459 UR - ISI:000167574800014 SO - Ieee Software 2001 ;18(2):47-53 2882 UI - 13967 AU - Federer WT AU - Reynolds M AU - Crossa J AD - Cornell Univ, Dep Biometr, Ithaca, NY 14853, USACIMMYT, Wheat Program, Mexico City 06600, DF, MexicoCIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoFederer, WT, Cornell Univ, Dep Biometr, 434 Warren Hall, Ithaca, NY 14853 USA TI - Combining results from augmented designs over sites AB - The class of augmented designs contains two kinds of treatments, standard or check and new or augmented. The latter are usually considered to be random effects while the check treatments are considered as fixed effects. New treatments are usually not replicated and the checks are replicated as points of reference. An augmented experiment design is a screening design. It is obtained by selecting arty experiment design for the check treatments and then enlarging the blocks or increasing the number of rows and/or columns to accommodate the new treatments. The new treatments are randomly distributed among the blocks or among the rows and columns. An augmented design has many advantages over systematic check arrangements and is useful for shortening the selection cycle over standard methods. Statistical procedures are available for recovering inter-block or inter-row-column and inter-variety information at each site, Procedures are presented herein for combining the results from single experiments over sites. Inter-site information may be recovered for random site effects. The method recommended for combining results is invariant to experiment design changes, variance heterogeneity, changes in checks from site to site, and different response models for each site. An experiment involving 120 new wheat genotypes and checks was conducted at three sites,It is used to illustrate the statistical procedure for combining results over sites. The new wheat genotypes exhibited a relatively large genotype X site interaction, indicating their site and environmental specificity MH - USA MH - Mexico|Distrito Federal PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000167969400017 L2 - INCOMPLETE BLOCK; INFORMATION; HETEROGENEITY; VARIANCE; WHEAT SO - Agronomy Journal 2001 ;93(2):389-395 2883 UI - 12510 AU - Fedrizzi L AU - Rodriguez FJ AU - Rossi S AU - Deflorian F AU - Di Maggio R AD - Univ Roma 1, Dipartimento ICMMPM, Rome, ItalyNatl Autonomous Univ Mexico, Fac Quim, Dept Ingn Met, Mexico City 04510, DF, MexicoUniv Trent, Dipartimento Ingn Mat, I-38050 Trent, ItalyFedrizzi, L, Univ Roma 1, Dipartimento ICMMPM, Via Eudossiana, Rome, Italy TI - The use of electrochemical techniques to study the corrosion behaviour of organic coatings on steel pretreated with sol-gel zirconia films AB - The two main features of a protective organic coating are its adhesion and corrosion protection. In order to improve both, chemical pretreatments have been used. The use of chromates was very popular, but recently they have been highly restricted because of their toxicity, so that chromate-free pretreatments have been developed and tested. An interesting alternative seems to be the deposition on the metallic surface of thin layers of zirconia by the sol-gel process. In this study thin films of amorphous zirconia on low carbon steel sheets have been obtained by the dip-coating technique, using two different complexing reagents. Control of the hydrolysis allowed the formation of ZrO2 films suitable as pretreatments, promoting the adhesion of organic coatings. The behaviour of these samples was compared with steel samples pretreated in conventional phosphatation baths. The adhesion of a polyester organic coating was evaluated by the pull-off technique, by measuring the detachment of cross-scratched samples after salt fog chamber testing, or by swelling the organic coating in methyl pyrrolidone. According to the results, the samples pretreated with zirconia layers showed promising performance, in comparison with commercial chemical treatments (tricationic phosphate and iron phosphate). The organic coating adhesion on zirconia films was found to depend strongly on the process parameters, e.g. concentration of the precursors solutions and chelating agents, which determine the thickness and the amount of organic residuals of the amorphous zirconia. Electrochemical impedance spectroscopy (EIS) was also used in sodium sulphate solutions to evaluate adhesion and the corrosion behaviour of these materials. No barrier properties of the zirconia films were observed. Resistance to delamination was studied by using samples where an artificial defect was made by mechanical tools of different diameter. The information obtained by EIS was in good agreement with the data obtained by salt fog chamber tests. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000171947300012 L2 - zirconia films;sol-gel pretreatments;organic coating;adhesion;electrochemical impedance;PROTECTIVE COATINGS; ADHESION; METALS SO - Electrochimica Acta 2001 ;46(24-25):3715-3724 2884 UI - 12496 AU - Felipe R AU - Ongay F AD - CIMAT, Guanajuato, GTO, MexicoICIMAF, Havana, CubaOngay, F, CIMAT, S-N Mineral Valenciana,Apdo Postal 402, Guanajuato, GTO, Mexico TI - Algebraic aspects of the discrete KP hierarchy AB - We discuss some algebraic properties of the so-called discrete KP hierarchy, an integrable system defined on a space of infinite matrices. We give an algebraic proof of the complete integrability of the hierarchy, which we achieve by means of a factorization result for infinite matrices, that extends a result of M. Adler and P. Van Moerbeke [Commun. Math. Plays. 203 (1999) 185; 207 (1999) 589] for the case of (semi-infinite) moment matrices, and that we call a Borel decomposition. (C) 2001 Elsevier Science Inc. All rights reserved MH - Cuba MH - Mexico|Guanajuato PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0024-3795 UR - ISI:000171862000001 L2 - discrete KP hierarchy;Borel decomposition;infinite dimensional integrable systems SO - Linear Algebra and Its Applications 2001 ;338():1-17 2885 UI - 13377 AU - Felipe R AU - Ongay F AD - Univ Antioquia, Medellin, ColombiaICIMAF, Havana, CubaCIMAT, Guanajuato, MexicoFelipe, R, Univ Antioquia, Medellin, Colombia TI - Super Brockett equations: A graded gradient integrable system AB - Rather recently equations of Lax type defined by a double commutator the so-called Blockett equations, have received considerable attention. In this paper we prove that a supersymmetric version of a Brockett hierarchy is an infinite dimensional integrable gradient system. As far as we know, this is the only graded system of this type existing in the literature MH - Colombia MH - Cuba MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0010-3616 UR - ISI:000169624700005 L2 - FLOWS SO - Communications in Mathematical Physics 2001 ;220(1):95-104 2886 UI - 12327 AU - Fenton DE AU - Najera BA AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, NL, MexicoUniv Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, EnglandNajera, BA, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, NL, Mexico TI - A new expanded Schiff-base cryptand AB - A new expanded Schiff-base cryptand derived from the direct '2+3' cyclocondensation of tris(2-aminoethyl)amine (tren) and 2,6-bis[formylphenoxymethyl]-pyridine (bfpp) is reported with its dinuclear copper (II) perchlorate complex. Reaction of tren and bfpp in the same ratio and in the presence of metal templates gave metal complexes of '1+1" and '2+2' macrocycles bearing one and two aminoethyl pendant arms, respectively MH - United Kingdom MH - Mexico|Nuevo Leon PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0095-8972 UR - ISI:000172387600004 L2 - Schiff base;cryptand;Cu(II);macrocyclic ligand;CRYSTAL-STRUCTURE; COORDINATION CHEMISTRY; MONONUCLEAR BARIUM; COMPLEXES; LIGANDS SO - Journal of Coordination Chemistry 2001 ;54(3-4):239-246 2887 UI - 13197 AU - Ferdinand K AU - Saini R AU - Lewin A AU - Yellen L AU - Barbosa JA AU - Kushnir E AD - Bristol Myers Squibb Co, Pharmaceut Res Inst, Cardiovasc Clin Res, Princeton, NJ 08543, USAXavier Univ Louisiana, New Orleans, LA, USANatl Res Inst, Los Angeles, CA, USACardiol Associates Med Grp, San Diego, CA, USACtr Invest Noroeste, Tijuana, SC, MexicoHtel Clin Cordoba, Santa Rosa, ArgentinaSaini, R, Bristol Myers Squibb Co, Pharmaceut Res Inst, Cardiovasc Clin Res, Route 206 & Provinceline Rd, Princeton, NJ 08543 USA TI - Efficacy and safety of omapatrilat with hydrochlorothiazide for the treatment of hypertension in subjects nonresponsive to hydrochlorothiazide alone AB - This multicenter, double-blind study evaluated efficacy and safety of the vasopeptidase inhibitor omapatrilat, which simultaneously inhibits neutral endopeptidase and angiotensin converting enzyme, when given in conjunction with hydrochlorothiazide (HCTZ) to subjects nonresponsive to HCTZ alone. The study enrolled 657 subjects with mild to severe hypertension. After a 2-week placebo lead-in period and a 4-week HCTZ phase. 274 subjects were randomized to receive omapatrilat (10 or 20 mg, electively titrated to 20 or 40 mg. respectively, at week 4 if seated diastolic blood pressure [SeDBP] was greater than or equal to 90 mm Hg) or matching placebo in addition to 25 mg of HCTZ as continuing therapy. The primary outcome measure was change in SeDBP from baseline to week 8. At week 8, placebo plus HCTZ-adjusted additional reductions in SeDBP in the omapatrilat 10/20 mg and 20/40 mg treatment groups (4 and 5 turn Hg, respectively) were significant (P < .001), as were changes in seated systolic blood pressure in both omapatrilat-treated groups (7 and 10 mm Hg, respectively; P < .001). Seated diastolic blood pressure was normalized (< 90 mm Hg) in 38% of subjects in the placebo group compared to 59% and 64% of subjects in the omapatrilat groups (P less than or equal to .008). Adverse events, serious adverse events, and discontinuations attributed to adverse events were infrequent. There were no clinically relevant changes in serum creatinine or potassium. Omapatrilat was effective and well tolerated when added to HCTZ in subjects whose blood pressure was not controlled with HCTZ alone. (C) 2001 American Journal of Hypertension, Ltd MH - Argentina MH - Mexico|Baja California MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0895-7061 UR - ISI:000170191100009 L2 - hydrochlorothiazide;hypertension;omapatrilat;vasopeptidase inhibitors;VASOPEPTIDASE INHIBITOR; ANTIHYPERTENSIVE EFFICACY; LISINOPRIL SO - American Journal of Hypertension 2001 ;14(8):788-793 2888 UI - 12310 AU - Fernandez-Bertran J AU - Reguera E AU - Ortiz P AD - IPN, CICATA, Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoUniv Havana, Ctr Pharmaceut Chem, Havana, CubaUniv Havana, Inst Mat & Reagents, Havana, CubaUniv Havana, Fac Chem, Havana, CubaFernandez-Bertran, J, IPN, CICATA, Ctr Appl Sci & Adv Technol, Legaria 694,Colonia Irrigac, Mexico City 11500, DF, Mexico TI - Spectroscopic study of the interactions of alkali fluorides with D-xylose AB - The interactions of alkali fluorides with D-xylose have been studied by X-ray diffraction (XRD), infrared spectroscopy (IR), nuclear magnetic resonance (NMR, H-1 and C-13) and atomic absorption spectrophotometry. KF and CsF form complexes with D-Xylose in a 1:1 molar ratio. These complexes can be obtained by solid state milling the reactants in an agate mortar or from methanolic solutions of the sugar and the salt. LiF and NaF do not form complex with D-xylose. IR and XRD prove the identical nature of the complexes obtained by milling and from solution. IR spectra indicate strong perturbation of the OH stretching vibrations with considerable shifts to lower frequencies, which must be caused by strong hydrogen bond formation to the fluorine anion. The perturbations of C-O bond are weak, indicating that cation binding to the oxygen atoms is not the main interaction responsible for the complex formation. H-1 NMR spectra of the D-Xylose-KF complex dissolved in deuterium oxide is equal to that of pure D-xylose, indicating the destruction of the complex in solution. The complex is stable in DMSO, and C-13 spectra of the complex in DMSO-d(6) and in solid state (CPMAS) spectra are in accordance with the observed interactions in the IR spectra. As far as we know, this is the first report of a sugar-halide salt complex in which the anion instead of the cation provides the binding forces. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000172282200009 L2 - infrared;NMR;sugar-fluoride complexes;mechanochemistry;REDUCING SUGARS; METAL; COMPLEXES SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2001 ;57(13):2607-2615 2889 UI - 13237 AU - Fernandez-Cruz L AU - Herrera M AU - Saenz A AU - Pantoja JP AU - Astudillo E AU - Sierra M AD - Univ Barcelona, Hosp Clin, Inst Digest Dis IMD, Dept Surg,Gastrointestinal Surg Dept, Barcelona, SpainInst Nacl Ciencias Med & Nutr Salvador Zubiran, INNSZ, Mexico City, DF, MexicoFernandez-Cruz, L, Univ Barcelona, Hosp Clin, Inst Digest Dis IMD, Dept Surg,Gastrointestinal Surg Dept, Barcelona, Spain TI - Laparoscopic pancreatic surgery in patients with neuroendocrine tumours: indications and limits AB - Laparoscopic pancreatic procedures are still at an evaluation stage with regard to their indications and techniques. Between January 1998 and December 2000, 13 patients with endocrine pancreatic tumours - 11 insulinomas and 2 non-functioning rumours - underwent laparoscopic surgery, laparoscopic ultrasonography being used in all the patients. Enucleation was performed in five patients. The operative time was 2-3 hours. Distal pancreatectomy was performed in six patients with insulinomas, and spleen preservation with intact splenic vessels was feasible in five. Splenectomy was necessary in one patient for technical reasons. Laparoscopic distal pancreatectomy with splenic vessel preservation was performed in two patients with a large (6 and 8 cm) non-functioning tumour. The mean operative time for all the patients undergoing distal pancreatectomy was 4 hours, ranging from 3 to 5 hours. A pancreatic fistula occurred in three patients after tumour enucleation and in two patients after distal pancreatectomy; the mean hospital stay for all patients was 5 days. Enucleation guided by laparoscopic ultrasonography thus allows safe tumour dissection and excision, laparoscopic distal pancreatectomy also being feasible and safe. Splenic salvage with splenic vessel preservation is technically possible. The laparoscopic approach allows a shorter hospital stay and an earlier return to normal activities MH - Mexico|Distrito Federal MH - Spain PB - LONDON: BAILLIERE TINDALL RP - NOT IN FILE U3 - TC 27 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 1521-690X UR - ISI:000170027200005 L2 - endocrine pancreatic tumours;non-functioning tumour;insulinoma;laparoscopic distal pancreatectomy;laparoscopic enucleation;laparoscopic ultrasonography;laparoscopic spleen salvage;ISLET-CELL TUMORS; NEOPLASIA TYPE-I; SURGICAL-MANAGEMENT; INSULINOMA; LOCALIZATION; EXPERIENCE; ULTRASONOGRAPHY; NEED SO - Best Practice & Research Clinical Endocrinology & Metabolism 2001 ;15(2):161-175 2890 UI - 12876 AU - Fernandez-Guasti A AU - Ferreira A AU - Picazo O AD - IPN, Ctr Invest & Estudios Avanzados, Dept Farmacobiol, Mexico City 14000, DF, MexicoUniv Republ, Fac Ciencias, Montevideo, UruguayIPN, Escuela Super Med, Mexico City 07738, DF, MexicoFernandez-Guasti, A, IPN, Ctr Invest & Estudios Avanzados, Dept Farmacobiol, Ap Postal 22026, Mexico City 14000, DF, Mexico TI - Diazepam, but not buspirone, induces similar anxiolytic-like actions in lactating and ovariectomized Wistar rats AB - Previous reports indicate that the behavioural effects (including anxiolytic-like actions, hypothermia, "serotonergic syndrome," maternal behaviour and aggression and reduction in ambulation) of the 5-HT1A agonist, 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT), are completely blocked in lactating rats. The present study compares the behavioural effects of buspirone (1.25, 2.5 and 5.0 mg/kg) and diazepam (0.5, 1.0, 2.0 and 4.0 mg/kg) between ovariectomized and mid-lactating rats. The study was carried out on Wistar female rats under inverted light/dark cycle conditions, by using the burying behaviour paradigm, the elevated plus maze and a general activity test. In both ovariectomized and lactating rats, diazepam produced a dose-dependent reduction in burying behaviour and an increase in the time spent in open arms, responses interpreted as anxiolytic. Buspirone at all doses (1.25, 2.5 and 5.0 mg/kg) produced clear motor impairments in lactating, but not in ovariectomized animals, indicating that the effects of this drug on the anxiety paradigms are unspecific. Diazepam, by contrast, at the highest dose (4.0 mg/kg) similarly inhibited ambulation in both conditions. In the elevated plus maze, control lactating subjects spent more time in the open arms compared with saline-treated ovariectomized subjects, suggesting an anxiolytic-like effect of lactation per se. The present results support the idea that some behavioural actions of drugs acting at the serotonergic system vary between ovariectomized and lactating rats. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Uruguay PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Behavioral Sciences;Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0091-3057 UR - ISI:000170985000009 L2 - buspirone;diazepam;elevated plus maze;burying behaviour;lactating and ovariectomized rats;ELEVATED PLUS-MAZE; BENZODIAZEPINE RECEPTOR; MATERNAL-BEHAVIOR; BURYING BEHAVIOR; ANIMAL-MODELS; MOTHER RATS; ANXIETY; 8-OH-DPAT; AGENTS; FEARFULNESS SO - Pharmacology Biochemistry and Behavior 2001 ;70(1):85-93 2891 UI - 14009 AU - Fernandez-Mejia C AU - Vega-Allende J AU - Rojas-Ochoa A AU - Rodriguez-Dorantes M AU - Romero-Navarro G AU - Matschinsky FM AU - Wang JH AU - German MS AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Genet Nutr, Inst Nacl Peditria, Mexico City 04530, DF, MexicoUniv Nacl Autonoma Mexico, Sch Chem, Mexico City 04530, DF, MexicoAutonomous Univ Sinaloa, Sch Chem Biol Sci, Culican 80000, Sinaloa, MexicoUniv Calif San Francisco, Hormone Res Inst, San Francisco, CA 94143, USAUniv Penn, Med Ctr, Diabet Res Ctr, Philadelphia, PA 19104, USAFernandez-Mejia, C, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Genet Nutr, Inst Nacl Peditria, Ave Iman 1,4th Floor, Mexico City 04530, DF, Mexico TI - Cyclic adenosine 3 ',5 '-monophosphate increases pancreatic glucokinase activity and gene expression AB - Comparison of the pancreatic and hepatic glucokinase gene transcripts reveals tissue-specific control of expression and the existence of two distinct promoters in a single glucokinase gene. The existence of alternate promoters suggests that separate factors regulate glucokinase transcription in the two tissues. Hepatic glucokinase expression has been shown to be repressed by cAMP; however, in the pancreatic p-cell it is unlikely that cAMP represses glucokinase activity, as cAMP is known to positively affect glucose-induced insulin secretion, a process that in mature islets requires pancreatic glucokinase activity. In this work we demonstrate that cAMP indeed has a stimulatory effect on pancreatic glucokinase. The cyclic nucleotide stimulates pancreatic glucokinase activity after 3-h incubation, and maximal effects are observed after 6 and 12 h of treatment, Using the bDNA assay, a sensitive signal amplification technique, we detected relative increases in glucokinase messenger RNA levels of 40.5 +/- 7.5% after 3-h incubation with cAMP. This stimulatory effect was increased to 106.3 +/- 22% after 6-h incubation and sustained up to 12 h of incubation. Inhibition of gene transcription by actinomycin D abolishes cAMP-induced glucokinase activity. In transfected fetal islets, cAMP increased the activity of the - 1000 bp rat glucokinase promoter by 60 +/- 6%. These data demonstrate that cAMP has a stimulatory effect on pancreatic glucokinase gene expression and that the nucleotide has opposite effects on pancreatic and hepatic glucokinase, supporting the concept that glucokinase transcription in the liver and that in the p-cell differ MH - Mexico|Distrito Federal MH - Mexico|Sinaloa MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 9 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0013-7227 UR - ISI:000167845900011 L2 - INSULIN RELEASE; BETA-CELLS; RAT-LIVER; GLUCOSE; ISLETS; CAMP; LANGERHANS; SECRETION; PROMOTER; CA-2+ SO - Endocrinology 2001 ;142(4):1448-1452 2892 UI - 13974 AU - Fernandez-Ruiz J AU - Wang J AU - Aigner TG AU - Mishkin N AD - NIMH, Neuropsychol Lab, Bethesda, MD 20892, USANatl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoNeurol & Neurol Associates, Poughkeepsie, NY 12601, USANIDA, Ctr Neurosci, Bethesda, MD 20892, USAMishkin, N, NIMH, Neuropsychol Lab, Bldg 9,Room 1880,49 Convent Dr, Bethesda, MD 20892 USA TI - Visual habit formation in monkeys with neurotoxic lesions of the ventrocaudal neostriatum AB - Visual habit formation in monkeys, assessed by concurrent visual discrimination learning with 24-h intertrial intervals (ITI), was found earlier to be impaired by removal of the inferior temporal visual area (TE) but not by removal of either the medial temporal lobe or inferior prefrontal convexity, two of TE's major projection targets. To assess the role in this form of learning of another pair of structures to which TE projects, namely the rostral portion of the tail of the caudate nucleus and the overlying ventrocaudal putamen, we injected a neurotoxin into this neostriatal region of several monkeys and tested them on the 24-h ITI task as well as on a test of visual recognition memory. Compared with unoperated monkeys, the experimental animals were unaffected on the recognition test but showed an impairment on the 24-h ITI task that was highly correlated with the extent of their neostriatal damage, The findings suggest that TE and its projection areas in the ventrocaudal neostriatum form part of a circuit that selectively mediates visual habit formation MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 40 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000167833700105 L2 - TEMPORAL AREAS TE; RHESUS-MONKEYS; RHINAL CORTEX; INTERTRIAL INTERVALS; CAUDATE-NUCLEUS; MACAQUE MONKEYS; PARAHIPPOCAMPAL CORTICES; SUBCORTICAL CONNECTIONS; HIPPOCAMPAL-LESIONS; RECOGNITION MEMORY SO - Proceedings of the National Academy of Sciences of the United States of America 2001 ;98(7):4196-4201 2893 UI - 12966 AU - Fernandez-Sanchez JM AU - Rodriguez-Vazquez R AU - Ruiz-Aguilar G AU - Alvarez PJJ AD - IPN, CINVESTAV, Depto Biotecnol & Bioingn, Mexico City 07360, DF, MexicoUniv Iowa, Dept Civil & Environm Engn, Iowa City, IA 52242, USARodriguez-Vazquez, R, IPN, CINVESTAV, Depto Biotecnol & Bioingn, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico TI - Pcb biodegradation in aged contaminated soil: Interactions between exogenous Phanerochaete chrysosporium and indigenous microorganisms AB - This work investigated whether the interaction between the white-rot fungus Phanerochaete chrysosporium and indigenous microorganisms could enhance polychlorinated biphenyl (PCB) removal from historically contaminated soil in aerobic microcosms. The PCB mixture was composed mainly of 14% tri-, 20% tetra-, 9% penta-, 17% hexa-, 26% hepta-, 11% octa-, and 3% nona-chlorobiphenyl (CB) congeners, determined by GC/MS. The fungus, which was grown on sugarcane bagasse and added via this solid substrate, successfully colonized the contaminated soil. The added fungi and the indigenous soil community biodegraded most PCB congeners, with removing efficiencies ranging from 13% to 100% for the 45-day incubation period. The interaction between the fungus and the microorganisms present in the added bagasse inhibited both heterotrophic activity (measured by CO2 evolution) and PCB degradation, suggesting a possible antagonism. In contrast, analysis of variance (ANOVA) inferred a synergistic effect between fungus and soil microorganisms, which resulted in a heterotrophic activity above 2.5 Mg-CO2/ g-initial dry matter/day. The statistical analyses also showed that the presence of fungus alone was particularly beneficial for the removal of penta- and hepta-CB MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1093-4529 UR - ISI:000170690300001 L2 - polychlorinated biphenyls;Phanerachaete chrysosporium;bioaugmentation;contaminated soil;sugar cane bagasse;solid culture;WHITE-ROT FUNGI; POLYCYCLIC AROMATIC-HYDROCARBONS; SUGARCANE BAGASSE PITH; POLYCHLORINATED-BIPHENYLS; DEGRADATION; GROWTH; MINERALIZATION; DECHLORINATION; DECOMPOSITION; SUBSTRATE SO - Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering 2001 ;36(7):1145-1162 2894 UI - 12796 AU - Fernandez B AU - Morante A AD - CNRS, Ctr Phys Theor, F-13288 Marseille 09, FranceUASLP, Inst Invest Comunicac Opt, San Luis Potosi, MexicoFernandez, B, CNRS, Ctr Phys Theor, Luminy Case 907, F-13288 Marseille 09, France TI - On the stability of periodic orbits in lattice dynamical systems AB - The variation of the norm of a matrix operator in the space l(q)(2) when q varies is investigated. The linear part of a lattice dynamical system is a matrix operator. The consequences of this variation on the stability of periodic orbits in such systems is given MH - France MH - Mexico|San Luis Potosi PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mechanics U5 - J;Article AV - English IS - 1468-9367 UR - ISI:000171190000003 SO - Dynamical Systems-An International Journal 2001 ;16(3):247-252 2895 UI - 12290 AU - Fernandez G AU - de la Cueva H AU - Warnock N AD - Simon Fraser Univ, Dept Biol Sci, Ctr Wildlife Ecol, Burnaby, BC V5A 1S6, CanadaCtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoFernandez, G, Simon Fraser Univ, Dept Biol Sci, Ctr Wildlife Ecol, Burnaby, BC V5A 1S6, Canada TI - Phenology and length of stay of transient and wintering Western Sandpipers at Estero Punta Banda, Mexico AB - The Western Sandpiper (Calidris mauri) is one of the most abundant shorebirds in northwestern Mexico however, little is known about its winter ecology ill this area. We, patterns of male Western Sandpipers during the winters of 1995-1996 (1995) and 1996-1997 (1996) at Estero Punta Banda in Baja California, Mexico. We resighted 54 birds in 1995 and 56 birds in 1996, Birds arrived later in 1995 (median 1 December) than in 1996 (median 24 October). The median departure dates (6 March 1996 and 20 February 1997) did not differ between years. We observed two patterns of residency, Wintering birds in 1995 arrived on 17 November (median) and departed on 17 March (,median), with length of stay of 120.0 +/- 4.2 d; and in 1996 arrived on 12 October (median) and departed oil 8 March (median), with length of stay of 146.9 +/- 4.3 d. Transient birds in 1995 arrived on 7 December (median) and departed oil 17 February (median), with stays of 33.7 +/- 4.3 d; and in 1996 arrived on 23 October (median) and departed on 3 December (median), with stays of 33.7 +/- 4.1 d. Residence time was independent of sighting effort. Both wintering birds and transients exhibited site fidelity between years. Both categories were independent with respect to age, trapping month, or Near. The mid-season departures were not correlated with either age or the banding period. Older birds were more likely to depart earlier and switch their residency pattern front wintering to transient. While the ecological significance of variation in residency patterns remains unknown, evidence from this and previous studies suggest that such variation may be relatively common, with important implications for studies of shorebird populations and conservation strategies MH - Canada MH - Mexico|Baja California PB - STATESBORO: ASSOC FIELD ORNITHOLOGISTS RP - NOT IN FILE U3 - TC 7 U4 - Ornithology U5 - J;Article AV - English IS - 0273-8570 UR - ISI:000172449700003 L2 - FRANCISCO BAY ESTUARY; CALIDRIS-MAURI; MOVEMENT PATTERNS; PACIFIC COAST; MIGRATION; SHOREBIRDS; FIDELITY; DUNLINS; PLOVERS; SITE SO - Journal of Field Ornithology 2001 ;72(4):509-520 2896 UI - 13833 AU - Fernandez RG AD - Univ La Habana, Ctr Invest Marinas, La Habana, CubaFernandez, RG, UNAM, Lab Biol Marina Expt, Calle 26 1 Playa Norte,Ciudad del Carmen,CP 24140, Mexico City, DF, Mexico TI - Artemia bioencapsulation I. Effect of particle sizes on the filtering behavior of Artemia franciscana AB - Artemia is not believed to be a selective filter-feeding organism; however, evidence of an influence of the size of the nutrient particles on the filtration process of this crustacean is presented. To evaluate the influence of the size of food on the fitration process, assays with latex particles and with starch granules were made. A relation between the frequency distribution of size of the particles found in the digestive tract of the animals and the frequency distribution of size of the particles found in the medium is shown. The results indicate that Artemia has a preference for food of specific size. The behavior of different size-classes of animals analyzed is shown, but I conclude the size of food for Artemia must range between 6.8 and 27.5 mum, with the optimum about 16.0 mum MH - Cuba MH - Mexico|Distrito Federal PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000168337700014 L2 - UNSATURATED FATTY-ACIDS; DIETARY VALUE; BRINE SHRIMP; SEED PRODUCTION; FISH LARVAE; ENRICHMENT; SALINA; IMPROVEMENT SO - Journal of Crustacean Biology 2001 ;21(2):435-442 2897 UI - 13378 AU - Fernex F AU - Zarate-del Valle P AU - Ramirez-Sanchez H AU - Michaud F AU - Parron C AU - Dalmasso J AU - Barci-Funel G AU - Guzman-Arroyo M AD - Univ Paris 06, UMR Geosci Azur, Lab Geodynam Marine, F-05235 Villefranche Sur Mer, FranceUniv Nice, Fac Sci, UMR CNRS Geosci Environm Geochim Isotop, F-06108 Nice 2, FranceUniv Guadalajara, CUCEI, Dep Quim, Guadalajara 44410, Jalisco, MexicoUniv Aix Marseille, CEREGE, F-13545 Aix En Provence 4, FranceUniv Nice, Fac Sci, Lab Radioecol & Radiochim, F-06108 Nice 2, FranceUniv Guadalajara, Inst Limnol, Chapala, MexicoMichaud, F, Univ Paris 06, UMR Geosci Azur, Lab Geodynam Marine, Darse BP 48, F-05235 Villefranche Sur Mer, France TI - Sedimentation rates in Lake Chapala (western Mexico): possible active tectonic control AB - Lake Chapala, a major natural freshwater reservoir, belongs to the watershed of the Rio Lerma, which originates from the Mexico City area, 450 km eastwards. The east-west-trending Lake Chapala basin is located on the active tectonic feature Citala rift. Sediments of cores collected in the lake were studied for their Pb-210, Ra-226, Cs-137 and Pu239-240 activities in order to evaluate sedimentation rates. profiles of magnetic susceptibility allowed stratigraphic correlations to be made since some fine levels display more or less high susceptibility values. This allows an average sediment accumulation rate to be calculated. The sediment accumulation rate was calculated assuming that, the activity at the interface of a defined site is constant in the course of time, since any global decrease or increase in the rates could not be observed. The direct flux of atmospheric Pb-210 was evaluated from the inventory in a horizontal soil: 0.25-0.3 dpm g(-1). Except from two cores at the west, the fluxes to sediment were higher than the direct atmospheric flux. The sedimentation rate's temporal variations along the cores seem to be mainly related to annual precipitation changes, with rates lower during the dryness epochs (1945-1957 and 1979-1991). The rates measured in the western part of the lake range approximately from 1 to 2 mm year. The lowest rates in the central and eastern areas are higher than 1.4-2.5 mm year(-1) and exceed 3.5 mm year(-1) (0.066 g cm(-2) year(-1)) near the Rio Lerma prodelta. As the lake is not deeper eastward than westward, it can be suggested that relative year subsidence, related to the active tectonic framework, compensates the higher sedimentation rate. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Jalisco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000169649200001 L2 - sedimentation rate;geochemistry;tectonic;Lake Chapala;Mexico;TRIPLE JUNCTION; VOLCANIC BELT; RIFT SYSTEM; PB-210; CS-137; JALISCO; FLUXES; BE-7; RADIONUCLIDES; PLEISTOCENE SO - Chemical Geology 2001 ;177(3-4):213-228 2898 UI - 13563 AU - Ferrari L AU - Petrone CM AU - Francalanci L AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76001, Queretaro, MexicoCarnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015, USAUniv Florence, Dipartimento Sci Terra, I-50121 Florence, ItalyFerrari, L, Univ Nacl Autonoma Mexico, Ctr Geociencias, Campus Juriquilla,Apdo Postal 1-742, Queretaro 76001, Queretaro, Mexico TI - Generation of oceanic-island basalt-type volcanism in the western Trans-Mexican volcanic belt by slab rollback, asthenosphere infiltration, and variable flux melting AB - Mantle plumes or decompression melting of a heterogeneous mantle have been proposed to explain oceanic-island basalt (OIB) type lavas found in the western Trans-Mexican volcanic belt. We show that mantle plumes cannot account for several geologic observations, whereas decompression melting is unrealistic given the low extension rate in the volcanic al c. On the basis of new geologic and geochemical studies, we propose an alternative model that reconciles geologic data, plate tectonic history, and petrology, Since 8.5 Ma, the volcanic front has migrated trenchward similar to 80 km, and OIB began to be emplaced in the rear half of the are after a period of stalled subduction of the Rivera plate between 7.2 and 4.8 Ma. As a whole, OIB accounts for similar to5% of the total volume of volcanism. Their trace element signatures require an enriched-mantle source, akin to the deep asthenosphere, hut also indicate a minor involvement of a subduction component. We propose that during the period of very low convergence at the end of the Miocene, the leading edge of the Rivera slab started to sink into the mantle and continued rolling back until it reached the present dip of 45 degrees. The sinking of the slab may have induced small amounts of asthenosphere to flow laterally into the opening mantle wedge, from the Gulf of California rift on the west and through the subducted Rivera-Cocos plate boundary on the east. This mechanism would produce veins of relatively enriched mantle, which would be able to produce melts with an OIB composition once the flux of fluids released from the subducted slab resumed MH - Italy MH - Mexico|Queretaro MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 13 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000169052100009 L2 - Mexico;Rivera plate;Trans-Mexican volcanic belt;oceanic island basalts;slab rollback;asthenosphere;PLUME-RELATED MAGMATISM; CALC-ALKALIC VOLCANISM; ACTIVE MARGIN; ARC MAGMAS; TECTONICS; CASCADES; RIVERA; PLATES; MANTLE SO - Geology 2001 ;29(6):507-510 2899 UI - 13963 AU - Ferro AA AU - Giridhar S AU - Mathias P AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoIndian Inst Astrophys, Bangalore 560034, Karnataka, IndiaObserv Cote Azur, Dept Fresnel, UMR 6528, F-06304 Nice, FranceFerro, AA, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - Atmospheric abundances in post-AGB candidates of intermediate temperature AB - Detailed atmospheric abundances have been calculated for a sample of A-G supergiant stars with IR fluxes and/or high galactic latitudes. HD 172481 and HD 158616 show clear indications of being post-AGB stars that have experienced third dredge-up. HD 158616 is carbon-rich while the abundance pattern of HD 172481 and its large Li enhancement gives support to the hot bottom burning scenario that explains paucity of carbon-rich stars among AGE stars. HD 172324 is very likely a hot post-AGE stat, that shuns a strong carbon deficiency. HD 725, HD 218753 and HD 331319 also appear to be evolved objects between the red giant and the AGE. HD 9167, HD 173638 with a fen exceptions, reflect solar abundances and no signs of post red giant evolution. They are mast likely young massive disk supergiants. Further analysis of proto-Planetary Nebula HDE 341617 reveals that He lines show signs of velocity stratification. The emission lines have weakened considerably since 1993. The envelope expands at 19 km s(-1) relative to the star. Atmospheric abundances, evolutionary tracks and isochrones are used to estimate masses and ages of all stars in the sample MH - France MH - India MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168057800023 L2 - stars : post-AGB;stars : chemically peculiar;stars : evolution;ASYMPTOTIC GIANT BRANCH; HIGH GALACTIC LATITUDES; DEFICIENT RED GIANTS; POOR HALO FIELD; A-F SUPERGIANTS; OSCILLATOR-STRENGTHS; OXYGEN ABUNDANCES; S-PROCESS; CHEMICAL-COMPOSITIONS; PLANETARY-NEBULA SO - Astronomy and Astrophysics 2001 ;368(1):250-266 2900 UI - 12770 AU - Ferro R AU - Rodriguez JA AU - Vigil O AU - Morales-Acevedo A AD - Univ La Habana, Fac Fis, Havana 10400, CubaCINVESTAV, IPN, Dept Ingn Elect, Mexico City 07360, DF, MexicoRodriguez, JA, AP 6426, Havana 10600 6, Cuba TI - Chemical composition and electrical conduction mechanism for CdO : F thin films deposited by spray pyrolysis AB - Interest in CdO is growing thanks to its potential use in different optoelectronic devices. Doping with fluorine has effectively improved its electro-optical properties. An analysis of the composition and electrical conduction mechanism of CdO:F films deposited by spray pyrolysis is made. Film properties result from the combined effect of oxygen substitution and oxygen vacancy occupation by fluorine atoms. Carrier scattering seems to be due to phonons and ionized or neutral impurities. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Letter AV - English IS - 0921-5107 UR - ISI:000171175500011 L2 - cadmium oxide;spray pyrolysis;conduction mechanism;mobility;PHYSICAL-PROPERTIES SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2001 ;87(1):83-86 2901 UI - 12892 AU - Figueredo AJ AU - Corral-Verdugo V AU - Frias-Armenta M AU - Bachar KJ AU - White J AU - McNeill PL AU - Kirsner BR AU - Castell-Ruiz ID AD - Univ Arizona, Dept Psychol, Program Evaluat & Res Methodol, Tucson, AZ 85721, USAUniv Sonora, Dept Psicol & Ciencias Commun, Hermosillo, Sonora, MexicoArizona Prevent Ctr, Hlth Sci Ctr, Tucson, AZ, USAFigueredo, AJ, Univ Arizona, Dept Psychol, Program Evaluat & Res Methodol, Tucson, AZ 85721 USA TI - Blood, solidarity, status, and honor - The sexual balance of power and spousal abuse in Sonora, Mexico AB - Independent samples of 128 women and 106 men were interviewed in a study site in Hermosillo, Sonora, Mexico. Respondents were screened for involvement in a committed sexual relationship during the past year, but not with each other. Questions pertained to family structure, support, and conflict; females reported on victimization by spousal aggression and males on perpetration. Previously documented effects of their partner's mate quality ("sex") and socioeconomic status ("money") were cross-culturally replicated. The following family structure parameters were also measured: (1) the local density of female kin, (2) the local density of male kin, (3) the social support provided by local kin, (4) the socioeconomic status of close kin, and (5) the "culture of honor" revenge ideology of the respondents. The same interactions of local density of male kin that protected women from spousal abuse also empowered men to perpetrate it. The risk of spousal abuse was mitigated by the "sexual balance of power" between the family structures of potential victims and potential perpetrators. Evidence was also found partially supporting several alternative hypotheses tested regarding local cultural and ideological mechanisms (culture of honor and patriarchal beliefs), major dimensions of psychopathology (anxiety and depression) and substance abuse (alcohol), and 2 indicators of general criminality (permissive and risk-taking attitudes). (C) 2001 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Sonora PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Psychology, Biological;Behavioral Sciences;Social Sciences, Biomedical U5 - J;Article AV - English IS - 1090-5138 UR - ISI:000170882400001 L2 - domestic violence;spousal abuse;coercive sexual strategy;extended family structure;sex-biased dispersal;patriarchy;culture of honor;general criminality;EVOLUTIONARY PSYCHOLOGY; MAJOR DEPRESSION; VIOLENCE; PREDICTION; PATERNITY; STRATEGY; WOMEN SO - Evolution and Human Behavior 2001 ;22(5):295-328 2902 UI - 14283 AU - Figueroa-Arredondo P AU - Heuser JE AU - Akopyants NS AU - Morisaki JH AU - Giono-Cerezo S AU - Enriquez-Rincon F AU - Berg DE AD - Washington Univ, Sch Med, Dept Mol Microbiol, St Louis, MO 63110, USAWashington Univ, Sch Med, Dept Genet, St Louis, MO 63110, USAWashington Univ, Sch Med, Dept Cell Biol, St Louis, MO 63110, USAIPN, Escuela Nacl Cincias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoCINVESTAV, IPN, Dept Biol Celular, Mexico City 07360, DF, MexicoFigueroa-Arredondo, P, Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, 200 Longwood Ave, Boston, MA 02115 USA TI - Cell vacuolation caused by Vibrio cholerae hemolysin AB - Non-O1 strains of Vibrio cholerae implicated in gastroenteritis and diarrhea generally lack virulence determinants such as cholera toxin that are characteristic of epidemic strains; the factors that contribute to their virulence are not understood. Here we report that at least one-third of diarrhea-associated nonepidemic V. cholerae strains from Mexico cause vacuolation of cultured Vero cells. Detailed analyses indicated that this vacuolation was related to that caused by aerolysin, a pore-forming toxin of Aeromonas; it involved primarily the endoplasmic reticulum at early times (similar to1 to 4 h after exposure), and resulted in formation of large, acidic, endosome-like multivesicular vacuoles (probably autophagosomes) only at late times (similar to 16 h), In contrast to vacuolation caused by Helicobacter pylori VacA protein, that induced by V. cholerae was exacerbated by agents that block vacuolar proton pumping but not by endosome-targeted weak bases. It caused centripetal redistribution of endosomes, reflecting cytoplasmic alkalinization, The gene for V. cholerae vacuolating activity was cloned and was found to correspond to hlyA, the structural gene for hemolysin. HlyA protein is a pore-forming toxin that causes ion leakage and, ultimately, eukaryotic cell lysis, Thus, a distinct form of cell vacuolation precedes cytolysis at low doses of hemolysin, We propose that this vacuolation, in itself contributes to the virulence of V. cholerae strains, perhaps by perturbing intracellular membrane trafficking or ion exchange in target cells and thereby affecting local intestinal inflammatory or other defense responses MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 23 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000167090200052 L2 - EL-TOR HEMOLYSIN; HELICOBACTER-PYLORI; NON-O1; TOXIN; GENE; CYTOTOXIN; CYTOLYSIN; STRAINS; PORE; HEMAGGLUTININ SO - Infection and Immunity 2001 ;69(3):1613-1624 2903 UI - 13199 AU - Finkelmann H AU - Kim ST AU - Munoz A AU - Palffy-Muhoray P AU - Taheri B AD - Kent State Univ, Inst Liquid Crystal, Kent, OH 44242, USAUniv Freiburg, Inst Makromol Chem, D-79104 Freiburg, GermanyUniv Autonoma Metropolitana, Dept Phys, Mexico City, DF, MexicoLG Cable Res Ctr, Optoelect Mat Dept, Kyungki Do 431080, South KoreaPalffy-Muhoray, P, Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA TI - Tunable mirrorless lasing in cholesteric liquid crystalline elastomers AB - Tuning the wavelength of a laser emission by mechanical deformation is not as implausible as it may seem. This communication proves that it can be done with cholesteric liquid crystal elastomers. The Figure shows what happens when a beam is focussed on the sample in its relaxed (left) and its stretched form (right) MH - Germany MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 170 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0935-9648 UR - ISI:000170142800002 SO - Advanced Materials 2001 ;13(14):1069-+ 2904 UI - 14041 AU - Firmani C AU - D'Onghia E AU - Chincarini G AU - Hernandez X AU - vila-Reese V AD - Osservatorio Astron Brera, I-23807 Merate, IC, ItalyUniv Milan, I-20100 Milan, ItalyUniv Milano Bicocca, Milan, ItalyOsservatorio Astrofis Arcetri, I-50125 Florence, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoFirmani, C, Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, IC, Italy TI - Constraints on dark matter physics from dwarf galaxies through galaxy cluster haloes AB - One of the predictions of the standard cold dark matter model is that dark haloes have centrally divergent density profiles. An extensive body of rotation curve observations of dwarf and low surface brightness galaxies shows the dark haloes of those systems to be characterized by soft constant-density central cores. Several physical processes have been proposed to produce soft cores in dark haloes, each one with different scaling properties. With the aim of discriminating among them we have examined the rotation curves of dark-matter-dominated dwarf and low surface brightness galaxies and the inner mass profiles of two clusters of galaxies lacking a central cD galaxy and with evidence of soft cores in the centre. The core radii and central densities of these haloes scale in a well-defined manner with the depth of their potential wells, as measured through the maximum circular velocity. As a result of our analysis we identify self-interacting cold dark matter as a viable solution to the core problem, where a non-singular isothermal core is formed in the halo centre surrounded by a Navarro, Frenk & White profile in the outer parts. We show that this particular physical situation predicts core radii in agreement with observations. Furthermore, using the observed scalings, we derive an expression for the minimum cross-section (sigma) which has an explicit dependence with the halo dispersion velocity (v). If m(x) is the mass of the dark matter particle: sigmam(x)approximate to 4x10(-25) (100 km s(-1) v(-1)) cm(2) GeV-1 MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 33 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000167629700011 L2 - galaxies : clusters : general galaxies : dwarf;galaxies : formation;galaxies : haloes;cosmology : theory;dark matter;DENSITY PROFILES; ROTATION CURVES; DISK GALAXIES; MASS; BRIGHTNESS; EVOLUTION; SUBSTRUCTURE; DEPENDENCE; UNIVERSAL; MODELS SO - Monthly Notices of the Royal Astronomical Society 2001 ;321(4):713-722 2905 UI - 13918 AU - Fisher MC AU - Koenig GL AU - White TJ AU - San-Blas G AU - Negroni R AU - Alvarez IG AU - Wanke B AU - Taylor JW AD - Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720, USARoche Mol Syst, Alameda, CA 94501, USAInst Venezolano Invest Cient, Ctr Microbiol & Cell Biol, Caracas 1020A, VenezuelaUniv Valle Mexico, Dept Hlth Sci, Queretaro, MexicoFac Med, Ctr Micol, Dept Microbiol, Buenos Aires, DF, ArgentinaHosp Evandro Chagas, Inst Oswaldo Cruz, Lab Micol Med, BR-21045900 Rio De Janeiro, BrazilFisher, MC, Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA TI - Biogeographic range expansion into South America by Coccidioides immitis mirrors New World patterns of human migration AB - Long-distance population dispersal leaves its characteristic signature in genomes, namely, reduced diversity and increased linkage between genetic markers. This signature enables historical patterns of range expansion to be traced. Herein, we use microsatellite loci from the human pathogen Coccidioides immitis to show that genetic diversity in this fungus is geographically partitioned throughout North America. in contrast, analyses of South American C. immitis show that this population is genetically depauperate and was founded from a single North American population centered in Texas. Variances of allele distributions show that South American C. immitis have undergone rapid population growth, consistent with an epidemic increase in postcolonization population size. Herein, we estimate the introduction into South America to have occurred within the last 9,000-140,000 years. This range increase parallels that of Home sapiens. Because of known associations between Amerindians and this fungus, we suggest that the colonization of South America by C. immitis represents a relatively recent and rapid codispersal of a host and its pathogen MH - Argentina MH - Brazil MH - USA MH - Mexico|Queretaro MH - Venezuela PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 50 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000168059700054 L2 - MICROSATELLITE LOCI; FUNGUS; EVOLUTION; DIFFERENTIATION; CONCORDANCE; GENEALOGIES; CONSTRAINTS; POPULATIONS; DNA SO - Proceedings of the National Academy of Sciences of the United States of America 2001 ;98(8):4558-4562 2906 UI - 12916 AU - Fitch A AU - Ibanez J AU - Berry R AD - Loyola Univ, Dept Chem, Chicago, IL 60626, USAUniv IberoAmer, Mexico City, DF, Mexico TI - Model for linking college instrumental analysis problem based learning with 6th grade science education MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690001201 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U240-U240 2907 UI - 12917 AU - Fitch A AU - Berry R AU - Ibanez J AU - Ahn F AU - Aron S AU - Barlan A AU - Gage E AU - Harwani S AU - Joseph A AU - Krueger M AU - Solinski J AU - Soneji M AU - Sumandea C AU - Walsh J AU - Zopp G AD - Loyola Univ, Dept Chem, Chicago, IL 60626, USAUniv Iberoamer, Mexico City, DF, Mexico TI - Service learning in instrumental analysis: Home leaded dust analysis with 6th grade students: A student designed curriculum MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690001298 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U253-U254 2908 UI - 12760 AU - Flambaum VV AU - Izrailev FM AD - Univ New S Wales, Sch Phys, Sydney, NSW 2052, AustraliaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoFlambaum, VV, Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia TI - Entropy production and wave packet dynamics in the Fock space of closed chaotic many-body systems AB - Highly excited many-particle states in quantum systems such as nuclei, atoms, quantum dots, spin systems, quantum Computers, etc., can be considered as "chaotic" superpositions of mean-field basis states (Slater determinants, products of spin or qubit states). This is due to a very high level density of many-body states that are easily mixed by a residual interaction between particles (quasi particles). For such systems, we have derived simple analytical expressions for the time dependence of the energy width of wave packets, as well as for the entropy, number of principal basis components, and inverse participation ratio, and tested them in numerical experiments. It is shown that the energy width Delta (t) increases linearly and very quickly saturates. The entropy of a system increases quadratically, S(t) similar to t(2), at small times, and afterward can grow linearly, S(t) similar to t, before saturation. Correspondingly, the number of principal components determined by the entropy N-rhoc similar to exp[S(t)] or by the inverse participation ratio increases exponentially fast before saturation. These results are explained in terms of a cascade model which describes the flow of excitation in the Fock space of basis components. Finally, the striking phenomenon of damped oscillations in the Fock space at the transition to equilibrium is discussed MH - Australia MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171136400062 L2 - FINITE FERMI SYSTEMS; NUCLEAR SHELL-MODEL; QUANTUM CHAOS; INTERACTING PARTICLES; STATISTICAL-THEORY; STRENGTH FUNCTIONS; COMPOUND STATES; QUASI-PARTICLE; LOCALIZATION; SPECTRUM SO - Physical Review e 2001 ;6403(3): 2909 UI - 13050 AU - Flambaum VV AU - Izrailev FM AD - Univ New S Wales, Sch Phys, Sydney, NSW 2052, AustraliaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoFlambaum, VV, Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia TI - Unconventional decay law for excited states in closed many-body systems AB - We study the time evolution of an initially excited many-body state in a finite system of interacting Fermi particles in the situation when the interaction gives rise to the "chaotic" structure of compound states. This situation is generic for highly excited many-particle states in quantum systems such as heavy nuclei, complex atoms, quantum dots, spin systems, and quantum computers. For a strong interaction the leading term for the return probability W(t) has the form W(t) similar or equal to exp(-Delta (2)(E)t(2)) with Delta (2)(E) as the variance of the strength function. The conventional exponential linear dependence W(t) = C exp(-Gammat) formally arises, for a very larger time. However, the prefactor C turns out to be exponentially large, thus resulting in a strong difference from the conventional estimate for W(t) MH - Australia MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000170493100031 L2 - FINITE FERMI SYSTEMS; NUCLEAR SHELL-MODEL; QUANTUM CHAOS; INTERACTING PARTICLES; WEAK PERTURBATIONS; STRENGTH FUNCTIONS; QUASI-PARTICLE; THERMALIZATION; FLUCTUATIONS; LOCALIZATION SO - Physical Review e 2001 ;6402(2): 2910 UI - 12750 AU - Fleury A AU - Bouteille B AU - Garcia E AU - Marquez C AU - Preux PM AU - Escobedo F AU - Sotelo J AU - Dumas M AD - Fac Med Limoges, Inst Epidemiol Neurol & Neurol Trop, F-87025 Limoges, FranceInst Nacl Neurol & Neurocirugia, Mexico City, DF, MexicoDumas, M, Fac Med Limoges, Inst Epidemiol Neurol & Neurol Trop, 2 Rue Dr Marcland, F-87025 Limoges, France TI - Neurocysticercosis: validity of ELISA after storage of whole blood and cerebrospinal fluid on paper AB - Cysticercosis is an infestation of Cysticercus cellulosae. When it occurs in the brain, chronic neurological complications can ensue, most commonly seizures. Neurocysticercosis is usually diagnosed by neuroimaging, a technique not available in most endemic countries. Hence immunological tests are valuable for diagnosis and epidemiological surveys. We evaluated the suitability of paper for storing blood and cerebrospinal fluid (CSF) until subsequent testing by enzyme-linked immunosorbent assay (ELISA), by testing whole blood samples on filter paper from 305 patients and CSF samples from 117 patients stored on ordinary white typing paper and on filter paper. Optimal preservation of biological samples is achieved when whole blood is stored on filter paper, CSF on white paper, and when samples are frozen within 1 week after collection. Our results could improve diagnostic capabilities and facilitate epidemiological surveys in endemic countries where immunodiagnostic tests cannot be rapidly performed because of inadequate laboratory infrastructure MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 1360-2276 UR - ISI:000171126300004 L2 - ELISA;Mexico;neurocysticercosis;paper;storage;HUMAN-IMMUNODEFICIENCY-VIRUS; FILTER-PAPER; ANTIBODIES; DIAGNOSIS; ASSAY; HIV; CYSTICERCOSIS; CONCORDANCE; OBSERVERS; SAMPLES SO - Tropical Medicine & International Health 2001 ;6(9):688-693 2911 UI - 13129 AU - Floater GJ AD - Univ Queensland, Dept Zool & Entomol, Brisbane, Qld 4072, AustraliaNatl Autonomous Univ Mexico, Inst Ecol, Dept Evolutionary Ecol, Mexico City 04510, DF, MexicoFloater, GJ, Univ Cambridge Queens Coll, Cambridge CB3 9ET, England TI - Habitat complexity, spatial interference, and "minimum risk distribution": A framework for population stability AB - In the past century, the debate over whether or not density-dependent factors regulate populations has generally focused on changes in mean population density, ignoring the spatial variance around the mean as unimportant noise. In an attempt to provide a different framework for understanding population dynamics based on individual fitness, this paper discusses the crucial role of spatial variability itself on the stability of insect populations. The advantages of this method are the following: (1) it is founded on evolutionary principles rather than post hoc assumptions; (2) it erects hypotheses that can be tested; and (3) it links disparate ecological schools, including spatial dynamics, behavioral ecology, preference-performance, and plant apparency into an overall framework. At the core of this framework, habitat complexity governs insect spatial variance. which in turn determines population stability. First, the "minimum risk distribution" (MRD) is defined as the spatial distribution of individuals that results in the minimum number of premature deaths in a population given the distribution of mortality risk in the habitat (and, therefore, leading to maximized population growth). The greater the divergence of actual spatial patterns of individuals from the MRD, the greater the reduction of population growth and size from high, unstable levels. Then, based on extensive data from 29 populations of the processionary caterpillar, Ochrogaster lunifer, four steps are used to test the effect of habitat interference on population growth rates. (1) The costs (increasing the risk of scramble competition) and benefits (decreasing the risk of inverse density-dependent predation) of egg and larval aggregation are quantified. (2) These costs and benefits, along with the distribution of resources, are used to construct the MRD for each habitat. (3) The MRD is used as a benchmark against which the actual spatial pattern of individuals is compared. The degree of divergence of the actual spatial pattern from the MRD is quantified for each of the 29 habitats. (4) Finally, indices of habitat complexity are used to provide highly accurate predictions of spatial divergence from the MRD, showing that habitat interference reduces population growth rates from high, unstable levels. The reason for the divergence appears to be that high levels of background vegetation (vegetation other than host plants) interfere with female host-searching behavior. This leads to a spatial distribution of egg batches with high mortality risk, and therefore lower population growth. Knowledge of the MRD in other species should be a highly effective means of predicting trends in population dynamics. Species with high divergence between their actual spatial distribution and their MRD may display relatively stable dynamics at low population levels. In contrast, species with low divergence should experience high levels of intragenerational population growth leading to frequent habitat-wide outbreaks and unstable dynamics in the long term. Six hypotheses, erected under the framework of spatial interference, are discussed, and future tests are suggested MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Ecology U5 - J;Review AV - English IS - 0012-9615 UR - ISI:000170305800006 L2 - aggregation;apparency;habitat heterogeneity;herbivory;ideal free distribution;insects;Lepidoptera;Ochrogaster lunifer;performance;predation;preference;spatial dynamics;HERRICH-SCHAFFER LEPIDOPTERA; CATERPILLAR OCHROGASTER-LUNIFER; PROCESSIONARY CATERPILLAR; PHYTOPHAGOUS INSECTS; CRUCIFEROUS FOODPLANTS; OVIPOSITION PREFERENCE; PIERID BUTTERFLIES; HEMILEUCA-LUCINA; PYRALID MOTH; DYNAMICS SO - Ecological Monographs 2001 ;71(3):447-468 2912 UI - 13454 AU - Flores-Mena JE AU - Barbosa MC AU - Levin Y AD - Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, BrazilUniv Autonoma Puebla, Fac Ciencias Elect, Puebla 72570, MexicoBoston Univ, Ctr Polymer Studies, Boston, MA 02215, USALevin, Y, Univ Fed Rio Grande Sul, Inst Fis, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, Brazil TI - Criticality in confined ionic fluids AB - A theory of a confined two-dimensional electrolyte is presented. The positive and negative ions, interacting by a l/r potential, are constrained to move on an interface separating two solvents with dielectric constants epsilon (1) and epsilon (2). It is shown that the Debye-Huckel type of theory predicts that this two-dimensional Coulomb fluid should undergo a phase separation into a coexisting liquid (high-density) and gas (low-density) phases. We argue, however, that the formation of polymerlike chains of alternating positive and negative ions can prevent this phase transition from taking place MH - Brazil MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169285300015 L2 - DIPOLAR HARD-SPHERES; RESTRICTED PRIMITIVE MODEL; LIQUID-VAPOR COEXISTENCE; MONTE-CARLO; PHASE-TRANSITION; ELECTROLYTES; FIELD; PLANE SO - Physical Review e 2001 ;6306(6): 2913 UI - 11875 AU - Flores-Santos L AU - Martin E AU - Dieguez M AU - Masdeu-Bulto AM AU - Claver C AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Rovira & Virgili, Dept Quim Fis & Inorgan, E-43005 Tarragona, SpainMartin, E, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, Cd Univ, Mexico City 04510, DF, Mexico TI - Novel chiral dithioethers derived from L-tartaric acid AB - The synthesis of a new family of systematically modified chiral dithioethers to be used as ligands is described. Phenylthioether derivative 5 and fluorine-containing dithioether ligands 6-8 and 13-15 were prepared by direct reaction of phenylthiol and o-, m- or p-fluorophenylthiol with two different ditriflate derivatives based on the L-tartaric skeleton. The chiral ditriflate 12 containing a dioxolane moiety was reacted with ethane- and propanedithiol. producing cyclic dithioethers 16 and 17, respectively, in good yields (approximate to 50%). The analogous ditriflate 4 with benzyl ether protecting groups, having a skeleton without restricted rotation, gave the thiolane 9 as the main product. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000173484900017 L2 - ASYMMETRIC HYDROGENATION; IRIDIUM COMPLEXES; LIGANDS; P,S-LIGANDS; BACKBONE; SULFIDE SO - Tetrahedron-Asymmetry 2001 ;12(21):3029-3034 2914 UI - 12146 AU - Flores A AU - Auer LH AU - Koenigsberger G AU - Cardona O AD - Inst Nacl Astrofis Opt & Elect, Puebla, MexicoLos Alamos Natl Lab, Los Alamos, NM 87545, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoFlores, A, Inst Nacl Astrofis Opt & Elect, Puebla, Mexico TI - The wind-wind collision region of the Wolf-Rayet binary V444 Cygni: How much optical line emission does it produce? AB - We model the emission-line profile variations that are expected to be produced by physical and wind eclipses in the Wolf-Rayet (W-R + O) binary system V444 Cyg. A comparison of the theoretical profiles with the He II 4686 Angstrom line observed in V444 Cyg allows us to isolate the effects that are likely to be due to the wind-wind collision region in this particular line. We estimate that the wind-wind collision region contributes no more than similar to 12% of the equivalent width of the emission line, with smaller values during elongations, when part of the shock cone is being eclipsed by the O star. The upper limit implies a maximum contribution from the wind-wind collision region of similar to1 x 10(35) ergs s(-1) to the total luminosity of He II 4686 Angstrom line. Using the analytical solution of Canto et al., we find that the bulk of this emission arises along the shock cone walls where the flow velocity is similar to 800 km s(-1), at a distance of similar to8 R. from the O star's surface, and at theta = 65 degrees -75 degrees from the line joining the centers of the two stars, with origin in the O star. The derived surface density of this region is sigma = 0.22 g cm(-2), which, together with the He II 4686 Angstrom luminosity, indicates that the thickness of the shock lies in the range 2-10 x 10(10) cm and the total density is 1-6 x 10(12) cm(-3) MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000172852700034 L2 - binaries : close;stars : individual (V444 Cygni);stars : winds, outflows;stars : Wolf-Rayet;SPECTROSCOPIC MICROSCOPE; COLLIDING WINDS; STELLAR WINDS; STAR WINDS; MASS-LOSS; V444-CYGNI; CONSTRAINTS; SYSTEMS; MODELS SO - Astrophysical Journal 2001 ;563(1):341-350 2915 UI - 14457 AU - Flores G AU - Padilla P AD - Univ Nacl Autonoma Mexico, FENOMEC, IIMAS, Mexico City 04510, DF, MexicoKeio Univ, Dept Math, Kohoku Ku, Yokohama, Kanagawa 2238522, JapanFlores, G, Univ Nacl Autonoma Mexico, FENOMEC, IIMAS, Circuito Escolar,Cd Univ, Mexico City 04510, DF, Mexico TI - Higher energy solutions in the theory of phase transitions: A variational approach AB - We establish the existence of a higher-energy solution to the vector Ginzburg Landau equation with a triple-well potential on a hounded and smooth domain on the plane. This solution is obtained by a linking argument. In implementing this variational approach we make several considerations on the dynamics of the negative gradient flow. In particular, we use the Conlty index to contruct a suitable one-dimensional invariant set. This solution has Morse index two in the nondegenerate case. We discuss its structure in connection with the so-called triple-junction configurations. (C) 2001 Academic Press MH - Japan MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0022-0396 UR - ISI:000166502300006 L2 - HOMOTOPY INDEXES; LOCAL MINIMIZERS; BOUNDARY MOTION; GRADIENT THEORY; EQUATION SO - Journal of Differential Equations 2001 ;169(1):190-207 2916 UI - 12823 AU - Flores H AU - Davis JI AD - Cornell Univ, LH Bailey Hortorium, Mann Lib 462, Ithaca, NY 14853, USAFlores, H, UNAM, Inst Biol, Ap Postal 70-233, Mexico City 04510, DF, Mexico TI - A cladistic analysis of Atripliceae (Chenopodiaceae) based on morphological data AB - Although there is considerable controversy regarding the phylogenetic structure and infrafamilial classification of Chenopodiaceae, the tribe Atripliceae generally has been recognized as a natural group. Relationships within this tribe remain controversial, especially with regard to the taxonomic delimitation and infrageneric classification of the largest genus, Atriplex. Most of the genera that have been segregated from Atriplex are monotypic or include few species that are variously distributed in Africa. Australia, or North America: however, one of these genera, Obione, includes half of all species of Atriplex sens. lat., and has a worldwide distribution. Seventy terminals were included in a cladistic analysis, based on morphological characters, to test the monophyly of Atripliceae and its subtribes, and of Atriplex, Obione, and several infrageneric groups. The taxonomic sample includes representatives of 22 putative genera of the tribe Atripliceae, and all sections of Atriplex (except Austrobione) and Obione, following Ulbrich's (1934) classification, from throughout the geographic range of the tribe. Primary hypotheses of homology were postulated for 78 characters reflecting variation in gross morphology, leaf anatomy, and chromosome number. Results, as reflected in the strict consensus tree, suggest that both Atripliceae and Atriplex are paraphyletic, with three outgroup genera from tribe Chenopodieae (Chenopodium, Monolepis, and Suckleya) nested among species of Atriplex. Also, monophyly of the subtribes of Atripliceae is not supported. The results suggest that the deepest branch within Atripliceae is between Ceratocarpus and all other members of the tribe. Kruscheninnikovia, the next genus to diverge, is the sister of a diverse clade that consists of two subclades. One of these includes Theleophyton plus Endolepis, Zuckia, and Gravia, and the other includes all species of Atriplex in the sample, plus all sampled species of Obione, the remaining genera of Atripliceae, and the three sampled genera of Chenopodieae, with Halimione pedunculata as the sister of all other members of this clade. Resolution generally is poor among species of Atriplex, and neither Obione nor most of the sections of Atriplex is resolved as monophyletic, though there is support for the monophyly of section Spongiocarpus. Also nested among species of Atriplex and Obione is a well resolved clade with four defined subgroups: Suckleya by itself, Atriplex hortensis and Chenopodium; Archiatriplex, Axyris, and Microgynoecium; and Monolepis, Proatriplex, Manochlamys, and Exomis. The results support the recognition of Endolepis, Theleophyton, and Zuckia (sensu Standley 1915) as segregates of Atriplex, but not Blackiella, Hatimione, Haloxanthium, Morrisiella, Neopreissia, Obione, Pachypharynx, or Senniella. In addition, the results suggest that the continued recognition of Archiatriplex, Axyris, Exomis, Manochlamys, Microgynoecium, Proatripex, and Spinacia (Atripliceae), as well as Chenopodium. Suckleya, and Monolepis (Chenopodieae) should be reconsidered. If these results are confirmed by further analyses using other character sets and a wider taxonomic sample, it will be necessary either to transfer several genera to Atriplex or to circumscribe Atriplex narrowly. and segregate a number of additional genera from it MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: TORREY BOTANICAL SOCIETY RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0040-9618 UR - ISI:000171136800009 L2 - Chenopodiaceae;Atripliceae;Chenopodieae;cladistics;phylogeny;morphology;ATRIPLEX; CARYOPHYLLALES; PHYLOGENY SO - Journal of the Torrey Botanical Society 2001 ;128(3):297-319 2917 UI - 14259 AU - Flores J AU - Horoi M AU - Muller M AU - Seligman TH AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoCent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859, USAUAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoFlores, J, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3,Codigo Postal 62251, Cuernavaca, Morelos, Mexico TI - Spectral statistics of the two-body random ensemble revisited AB - Using longer spectra we reanalyze spectral properties of the two-body random ensemble studied 30 years ago. At the center of the spectra the old results are largely confirmed, and we show that the nonergodicity is essentially due to the variance of the lowest moments of the spectra. The longer spectra allow us to test and reach the limits of validity of French's correction for the number variance. At the edge of the spectra we discuss the problems of unfolding in more detail. With a Gaussian unfolding of each spectrum the nearest-neighbor spacing distribution between ground state and first exited state is shown to be stable. Using such an unfolding the distribution tends toward a semi-Poisson distribution for longer spectra. For comparison with the nuclear table ensemble we could use such unfolding obtaining similar results as in the early papers, but an ensemble with realistic splitting gives reasonable results if we just normalize the spacings in accordance with the procedure used for the data MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000167022500029 L2 - FINITE FERMI SYSTEMS; SHELL-MODEL; TRANSITION; STATES; CHAOS SO - Physical Review e 2001 ;63(2): 2918 UI - 14437 AU - Font J AU - Ramos-Casals M AU - Cervera R AU - Garcia-Carrasco M AU - Torras A AU - Siso A AU - Darnell A AU - Ingelmo M AD - Univ Barcelona, Sch Med, Hosp Clin, Syst Autoimmune Dis Unit, E-08036 Barcelona, SpainUniv Barcelona, Sch Med, Hosp Clin, Dept Nephrol, E-08036 Barcelona, SpainUniv Barcelona, Sch Med, Hosp Clin, Inst Invest Biomed august Pi & Sunyer,Dept Med, E-08036 Barcelona, SpainBenemerita Univ, Sch Med, Dept Rheumatol, Puebla, MexicoFont, J, Univ Barcelona, Sch Med, Hosp Clin, Syst Autoimmune Dis Unit, C Villarroel 170, E-08036 Barcelona, Spain TI - Cardiovascular risk factors and the long-term outcome of lupus nephritis AB - We evaluated cardiovascular risk factors, morbidity and mortality in patients with lupus nephritis (LN). We prospectively studied 70 consecutive patients with LN, and 70 age- and sex-matched controls with systemic lupus erythematosus (SLE) but no evidence of nephropathy, from 1988 to 1998. Patients were evaluated at entry for hypertension, diabetes, hyperlipidaemia, smoking, menopause and antiphospholipid syndrome. The LN patients (64 women, 6 men) had a mean age of 35 years (SE 1.7, range 11-67). During the 10 years, 15 (21%) LN patients and 18 (25%) of the controls were lost to follow-up. Compared with controls, LN patients had a higher prevalence of hyperlipidaemia (44% vs. 2%, p < 0.001), hypertension (44% vs. 9%, p < 0.001) and antiphospholipid antibodies (45% vs. 22%, p = 0.01) at study onset. At the last visit, 37 (67%) LN patients had normal plasma creatinine, 13 (24%) had renal failure and only five (9%) end-stage renal failure. Hyperlipidaemia (78% vs. 27%, p < 0.001) and hypertension (67% vs. 32%, p = 0.01) at study onset were associated with development of renal failure. Nine LN patients and one control died (16% vs. 2%, p = 0.02). These patients showed more antiphospholipid syndrome (56% vs. 17%, p = 0.03) and hyperlipidaemia (78% vs. 37%, p = 0.03) at study onset. The main causes of death in LN patients were vascular complications (cardiovascular or cerebrovascular events) in five patients (four of whom had antiphospholipid antibodies) and sepsis in three MH - Mexico|Puebla MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 19 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 1460-2725 UR - ISI:000166602000004 L2 - ANTICARDIOLIPIN ANTIBODIES; ISOTYPE DISTRIBUTION; PROGNOSTIC FACTORS; HISTOLOGIC DATA; RENAL-FUNCTION; KIDNEY BIOPSY; ERYTHEMATOSUS; DISEASE; PREDNISONE; GLOMERULONEPHRITIS SO - Qjm-An International Journal of Medicine 2001 ;94(1):19-26 2919 UI - 12810 AU - Forbes GW AU - Alonso MA AD - Macquarie Univ, Dept Phys, Sydney, NSW 2109, AustraliaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62260, Morelos, MexicoForbes, GW, Macquarie Univ, Dept Phys, Sydney, NSW 2109, Australia TI - Consistent analogs of the Fourier uncertainty relation AB - To resolve an issue that was raised in our earlier paper in this journal [69, 340-347 (2001)], a direct analog of the standard uncertainty relation is derived for the discrete Fourier transform (DFT). This inequality gives a simple lower bound for the degree of localization of the DFT of any sequence in terms of just the localization of the original sequence. It is also shown that the earlier uncertainty relations for the Fourier transform and the Fourier series can be derived from this new relation by taking appropriate limits. Because the same cannot be said of the others, this new relation is arguably the most fundamental of the three. (C) 2001 American Association of Physics Teachers MH - Australia MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0002-9505 UR - ISI:000171168500010 L2 - PHASE SO - American Journal of Physics 2001 ;69(10):1091-1095 2920 UI - 14566 AU - Forge D AU - Alfonsin JLR AD - Univ Paris 06, F-75252 Paris 05, FranceNatl Autonomous Univ Mexico, Inst Matemat, Area Invest Cient, Mexico City 04510, DF, MexicoAlfonsin, JLR, Univ Bonn, Forschunginst Diskrete Math, Lenestr 2, D-53113 Bonn, Germany TI - On reconstructing arrangements from their sets of simplices AB - Let G(H)(S,H) be the bipartite graph with partition sets S and H, the set of simplices and hyperplanes of H, where simplex s epsilon S is adjacent to hyperplane h epsilon H if one facet of s lies on h. In this paper, we give a complete characterization of G(H) (S, H) when H is a Gamma -arrangement. We also study G(H)(S,H) when H is a pseudoline arrangement. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000166245100010 L2 - arrangements;hyperplanes;oriented matroids;union SO - Discrete Mathematics 2001 ;226(1-3):175-190 2921 UI - 13796 AU - Foroudian HJ AU - Gillitt ND AU - Bunton CA AU - Yatsimirsky AK AD - Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106, USANatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoBunton, CA, Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA TI - Role of peroxophosphate intermediates in reactions of tris(4-nitrophenyl) phosphate and phenyl phosphorochloridate with alkaline hydrogen peroxide AB - Reaction of alkaline hydrogen peroxide with tris(4-nitrophenyl) phosphate generates ca 1.5 equiv. of 4-nitrophenol per mole of substrate with no evidence of build-up of an intermediate, and reaction of bis(4-nitrophenyl) phosphate anion is too slow to give a product. The initially formed bis(4-nitrophenyl) peroxophosphate is assumed to decompose to the phosphate ester by reaction with H2O2 or to eliminate 4-nitrophenoxide ion with the formation of a transient cyclic peroxophosphate. Reaction of phenyl phosphorochloridate anion with HO2- does not give phenoxide ion by this intramolecular reaction. Semi-empirical and ab initio simulations indicate that elimination of aryloxide ion from an aryl peroxophosphate should generate a cyclic rather than an open-chain peroxophosphate. Copyright (C) 2001 John Wiley & Sons, Ltd MH - USA MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0894-3230 UR - ISI:000168436600007 L2 - hydrogen peroxide;tris(4-nitrophenyl) phosphate;phenyl phosphorochloridate;cleavage;kinetics;structure simulations SO - Journal of Physical Organic Chemistry 2001 ;14(5):310-314 2922 UI - 13379 AU - Franco-Gordo C AU - Suarez-Morales E AU - Godinez-Dominguez E AU - Flores-Vargas R AD - Univ Guadalajara, Ctr Ecol Costera, San Patricio Melaque 48980, Jalisco, MexicoColegio Frontera Sur, ECOSUR, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoFranco-Gordo, C, Univ La Coruna, Dept Biol Anim Vegetal & Ecol, Campus Zapateira S-N, La Coruna 15071, Spain TI - A seasonal survey of the fish larvae community of the central Pacific coast of Mexico AB - Larval fish abundance off the coasts of the central portion of the Mexican Pacific was studied during a year cycle. Zooplankton samples were collected during 11 sampling cruises carried out between December 1995 and December 1996 using a bongo net. A total of 63,342 larvae were collected. The most abundant families were Bregmacerotidae 94.6%, Eleotridae 1.19%, Sciaenidae 0.67%, and Engraulidae 0.64%. Abundance values were significantly higher (P < 0.005) at near-shore stations, suggesting a potential ecological use of adjacent coastal environments as nursery areas. Fish larvae were most abundant during January-May, a period with the lowest average sea temperature, which is related to the seasonal influence of the California Current (CC). In these months, advective processes are active along the outer shelf favoring upwelling of colder, relatively nutrient-richer waters which in turn allow an overall local increase of zooplankton activity and populations. The high variability of abundance values in the surveyed area suggest episodic, localized processes enhancing the local productivity. Lowest abundance occurred in October-December, when the CC is weak and the area is influenced by tropical oligotrophic waters. Highest abundance values were consistently found at nearshore stations, this is probably related to ( 1) the extraordinary dominance of the coastal species Bregmaceros bathymaster and (2) the inshoreward transport of larvae into potential nursery areas. B. bathymaster was the most abundant larvae during the entire survey period. It is suggested that this species has a year-round breeding cycle, with moderate month-to-month but sharp seasonal variations. The absence of adult individuals of this species in the surveyed area suggest that it probably spawns in the ocean and its larval stages are transported inshorewards into potential nursery zones MH - Mexico|Jalisco MH - Mexico|Quintana Roo MH - Spain PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000169661700002 L2 - CALIFORNIA CURRENT SYSTEM; CONTINENTAL-SHELF; JALISCO; COLIMA; ICHTHYOPLANKTON; ZOOPLANKTON; ABUNDANCE; PATTERNS SO - Bulletin of Marine Science 2001 ;68(3):383-396 2923 UI - 12923 AU - Franco-Lopez H AU - Ek AR AU - Bauer ME AD - Univ Minnesota, Dept Forest Resources, St Paul, MN 55108, USAUniv Antonio Narro, Dept Forest Resources, Saltillo, Coahuila, MexicoEk, AR, Univ Minnesota, Dept Forest Resources, 1530 N Cleveland Ave,115 Green Hall, St Paul, MN 55108 USA TI - Estimation and mapping of forest stand density, volume, and cover type using the k-nearest neighbors method AB - Mapping forest variables and associated characteristics is fundamental for forest planning and management. Considerable effort has been made in Northern Europe to develop techniques for wall-to-wall mapping of forest variables. Following that work, we describe the k-nearest neighbors (kNN) method for improving estimation and to produce wall-to-wall basal area, volume, and cover type maps, in the context of the USDA Forest Service's Forest Inventory and Analysis (FIA) monitoring system. Several variations within the kNN were tested, including: distance metric, weighting function, feature weighting parameters, and number of neighbors. Specific procedures to incorporate ancillary information and image enhancement techniques were also tested. Using the nearest neighbor (k = 1), Euclidean distance, a three date 18-band composite image, and feature weighting parameters, maps were constructed for basal area, volume, and cover type. The empirical, bootstrap based, 95% confidence interval for the basal area root mean square error (MSE) is (8.21, 9.02) m(2)/ha and for volume (48.68, 54.58) m(3)/ha. For the 13 FIA forest cover type classes, results indicated useful map accuracy and the choice of k = 1 retained the full range of forest types present in the region. The 95% confidence interval, obtained using the bootstrap 0.632+ technique, for the overall accuracy (OA) in the 13 cover type classification was (0.4952, 0.5459). Recommendations for applying the kNN method for mapping and regional estimation are provided. (C) 2001 Elsevier Science Inc, All rights reserved MH - Mexico|Coahuila MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 52 U4 - Environmental Sciences;Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0034-4257 UR - ISI:000170850400002 L2 - forest inventory;k-nearest neighbors;estimation;THEMATIC MAPPER DATA; CROSS-VALIDATION; AVHRR DATA; CLASSIFICATION; ACCURACY; INVENTORY; IMAGERY SO - Remote Sensing of Environment 2001 ;77(3):251-274 2924 UI - 12219 AU - Franco J AU - Crossa J AU - Ribaut JM AU - Betran J AU - Warburton ML AU - Khairallah M AD - Univ Republica, Fac Agron, Montevideo 12900, UruguayCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoTexas A&M Univ, Dept Crop Sci, College Stn, TX 77843, USAFranco, J, Univ Republica, Fac Agron, Ave Garzon 780, Montevideo 12900, Uruguay TI - A method for combining molecular markers and phenotypic attributes for classifying plant genotypes AB - Classifying genotypes into clusters based on DNA fingerprinting, and/or agronomic attributes. for studying genetic and phenotypic diversity is a common practice. Researchers are interested in knowing the minimum number of fragments (and markers) needed for finding the underlying structural patterns of diversity in a population of interest. and using this information in conjunction with the phenotypic attributes to obtain more precise clusters of genotypes. The objectives of this study are to present: (1) a retrospective method of analysis for selecting a minimum number of fragments (and markers) from a study needed to produce the same classification of genotypes as that obtained using all the fragments (and markers), and (2) a classification strategy for genotypes that allows the combination of the minimum set of fragments with available phenotypic attributes. Results obtained on seven experimental data sets made up of different plant species, number of individuals per species' and number of markers, showed that the retrospective analysis did indeed find few relevant fragments (and markers) that best discriminated the genotypes. In two data sets, the classification strategy of combining the information on the relevant minimum fragments with the available morpho-agronomic attributes produced compact and well-differentiated groups of genotypes MH - Mexico|Distrito Federal MH - Uruguay MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 20 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000172530400015 L2 - molecular markers;fragments;cluster analysis;simple matching coefficients;analysis of molecular variance;mixture models;GENETIC-RESOURCES SO - Theoretical and Applied Genetics 2001 ;103(6-7):944-952 2925 UI - 12410 AU - Franco J AU - Kurtz SE AU - Garcia-Barreto JA AU - Garcia-Segura G AU - de la Fuente E AU - Hofner P AU - Esquivel A AD - UNAM, Inst Astron, Mexico City, DF, MexicoNAIC, Arecibo, PR, USAUniv Puerto Rico, San Juan, PR 00936, USAUniv Iberoamer, Mexico City, DF, MexicoFranco, J, UNAM, Inst Astron, Mexico City, DF, Mexico TI - Pressure and density gradients in HII regions AB - Here we discuss the effects of large ambient pressures and decreasing density gradients on the observed properties of dusty UC hii regions. Dust absorption can effectively reduce the size of the photoionized region, and density gradients can modify the spectral index of the emission. The effects of the density gradients seem to be present in both galactic and extragalactic HII regions MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900011 L2 - stars;formation;HII regions;H-II REGIONS; EVOLUTION; CLOUDS SO - Astrophysics and Space Science 2001 ;277():71-74 2926 UI - 12412 AU - Franco J AU - Hensler G AD - UNAM, Inst Astron, Mexico City, DF, MexicoUniv Kiel, D-24098 Kiel, GermanyFranco, J, UNAM, Inst Astron, Mexico City, DF, Mexico TI - The interstellar medium and the intergalactic medium AB - Here we present a summary of the first discussion session on the interstellar and intergalactic medium MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900030 L2 - galaxies : intergalactic medium;ISM : general;EMISSION-LINE GALAXIES; STAR-FORMATION; MOLECULAR CLOUDS; HYDROSTATIC EQUILIBRIUM; HOT PLASMA; X-RAYS; EVAPORATION; GAS; FRAGMENTATION; CONDENSATION SO - Astrophysics and Space Science 2001 ;277():125-133 2927 UI - 12535 AU - Franco M AU - Tapia E AU - Santamaria J AU - Zafra I AU - Garcia-Torres R AU - Gordon KL AU - Pons HC AU - Rodriguez-Iturbe B AU - Johnson RJ AU - Herrera-Acosta J AD - Inst Nacl Cardiol, Dept Nephrol, Mexico City 14080, DF, MexicoUniv Washington, Med Ctr, Div Nephrol, Seattle, WA 98195, USAInst Invest Biomed, Maracaibo, VenezuelaFranco, M, Inst Nacl Cardiol, Dept Nephrol, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Renal cortical vasoconstriction contributes to development of salt-sensitive hypertension after angiotensin II exposure AB - Rats that are administered angiotensin II (AngII) for 2 wk develop persistent salt-sensitive hypertension, which can be prevented by the immunosuppressor mycophenolate mofetil (MMF) given during the AngII infusion. This study examined the contribution of glomerular hemodynamics (GFR dynamics) in the post-AngII hypertensive response to a high-salt diet (HSD) and the effect of MMF treatment. During AngII administration, rats developed severe hypertension (systolic BP [SBP], 185 +/- 3.9 mmHg), proteinuria, afferent and efferent vasoconstriction, and glomerular hypertension. Rats that received AngII+MMF showed similar responses to AngII; however, they developed lower proteinuria (P < 0.05). At 2 wk, AngII was withdrawn and SBP returned toward normal. Rats were then placed on an HSD (4% NaCl), resulting in a progressive increase in SBP (155 .2 mmHg at week 1 and 163 +/- 4.5 mmHg at week 5). GFR dynamic alterations persisted after AngII was stopped, i.e., afferent and efferent vasoconstriction, decreased glomerular plasma flow and single-nephron GFR, and lower ultrafiltration coefficient. These changes correlated with the thickening of the afferent arteriole and with focal tubulointerstitial injury. In the AngII+MMF group, SBP remained unchanged throughout the HSD period (146 +/- 2.3 mmHg at week 1 and 148 +/- 4.4 mmHg at week 5) in association with less afferent arteriolar thickening and tubulointerstitial injury. Single-nephron GFR, glomerular plasma flow, efferent resistance, and ultrafiltration coefficient returned to normal with a significant reduction in afferent resistance. These results suggest a critical role of cortical vasoconstriction in salt-sensitive hypertension. The MMF-induced prevention of these changes suggests that immune mechanisms are involved in the vasoconstrictive response MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 39 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000171857100010 L2 - ULTRAFILTRATION COEFFICIENT; BLOOD-PRESSURE; ARTERIOLAR; DISEASE; SODIUM; RAT SO - Journal of the American Society of Nephrology 2001 ;12(11):2263-2271 2928 UI - 14237 AU - Frau A AU - Pisciotta M AU - Gurrola GB AU - Possani LD AU - Prestipino G AD - CNR, Ist Cibernet & Biofis, I-16149 Genoa, ItalyUniv Genoa, Dept Biophys & Elect Engn, NBT Grp, I-16145 Genoa, ItalyNatl Autonomous Univ Mexico, Inst Biotecnol, Cuernavaca 62210, Morelos, MexicoPrestipino, G, CNR, Ist Cibernet & Biofis, Via De Marini 6, I-16149 Genoa, Italy TI - Synthetic undecapeptide (NTX10-20) of noxiustoxin blocks completely the /(A) potassium currents of cerebellum granular cells AB - Native noxiustoxin (NTX) and synthetic peptides corresponding to its primary sequence, from positions 1-9, 1-14, 1-20, 10-20, 21-39 and 30-39, were prepared and assayed on the K+ currents of cerebellum granular cells, using the patch-clamp technique in the whole-cell configuration system. Native toxin has a reversible inhibitory effect (IC50 = 360 nM), whereas synthetic peptides NTX1-20 and NTX1-9 had a half-effective dose IC50 Of approximately 2 and 10 muM, respectively, which correlates with their biological effects in vivo. Synthetic peptide NTX10-20 was quite remarkable in having a preference for the I-A current, which was completely inhibited at high peptide concentration. The effects of the other peptides (NTX1-14, NTX21-39 and NTX30-39), although positive and reversible, required higher concentrations (50-200 muM) to block both currents, suggesting no affinity or, at least, much lower specificity for the channels responsible for the potassium currents in the granular cells studied MH - Italy MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Biophysics U5 - J;Article AV - English IS - 0175-7571 UR - ISI:000167187900002 L2 - granular cells;noxiustoxin;synthetic peptides;scorpion toxin;potassium ion channels;DEPENDENT K+-CHANNELS; SCORPION TOXINS; PEPTIDES; VENOM; SITE SO - European Biophysics Journal with Biophysics Letters 2001 ;29(8):569-573 2929 UI - 13125 AU - Frenkel M AU - Iglesias-Silva GA AU - Mannan MS AU - Hall KR AD - Natl Inst Stand & Technol, Thermodynam Res Ctr, Boulder, CO 80303, USAInst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAFrenkel, M, Natl Inst Stand & Technol, Thermodynam Res Ctr, 325 Broadway, Boulder, CO 80303 USA TI - Fitting vapor pressure-temperature data: simplicity and unintended consequences AB - The (1, 1.5, 3, 6) Wagner vapor pressure equation has gained acceptance in a variety of applications, e.g. in various software packages designed to 'simulate' chemical engineering processes. While this equation can fit vapor pressure data over the entire temperature range including the vicinity of the critical point, indiscriminate use of this equation can lead to substantial extrapolation errors and erroneous enthalpies of vaporization. Several examples of vapor pressure fits compare results obtained from the (1, 1.5, 3, 6) Wagner equation with other equations constrained to fit the lower and higher pressure limits. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000170385600019 L2 - vapor pressure;enthalpy of vaporization;vapor pressure equation;LIQUID SO - Fluid Phase Equilibria 2001 ;183():217-228 2930 UI - 12657 AU - Fritsch E AU - Mihut L AU - Baibarac M AU - Baltog I AU - Ostrooumov M AU - Lefrant S AU - Wery J AD - Inst Mat Jean Rouxel, Lab Phys Cristalline, F-44322 Nantes, FranceNatl Inst Mat Phys, Lab 160, R-76900 Bucharest, RomaniaUniv Michoacana San Nicolas de Hidalgo, Dept Geol & Mineral, Morelia 58000, Michoacan, MexicoFritsch, E, Inst Mat Jean Rouxel, Lab Phys Cristalline, 2 Rue Houssiniere,BP 32229, F-44322 Nantes, France TI - Luminescence of oxidized porous silicon: Surface-induced emissions from disordered silica micro- to nanotextures AB - The luminescence spectra of fully oxidized porous silicon show two broad bands and one vibronic structure between 2 and 3.3 eV, all excited at 340 or 275 nm (3.65 and 4.51 eV). Two of these structures have not been described previously. Interestingly, these emissions are found in other forms of amorphous or disordered silica with high specific surfaces: frosted silica glass, silica gel, even various natural opals. These emissions disappear when the surface is passivated. They are, therefore, attributed to surface-related defects. The vibronic structure involves a nearly free SiO4 tetrahedron. Another vibronic structure found only in some opals is attributed to the uranyl group. (C) 2001 American Institute of Physics MH - France MH - Mexico|Michoacan MH - Romania PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000171594800067 L2 - LIGHT-EMISSION; PHOTOLUMINESCENCE; MECHANISMS; OXYGEN; SIO2; SPECTROSCOPY; DECAY SO - Journal of Applied Physics 2001 ;90(9):4777-4782 2931 UI - 13224 AU - Froehlich SJ AU - Elizalde-Campos AA AU - Velasco-Castrejon O AU - Rivas-Sanchez B AU - de Kaspar HM AU - Guajardo GT AD - Univ Munich, Hosp Eye, D-8000 Munich, GermanyGen Hosp Mexico, Dept Ophthalmol, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, UNAM, Hosp Trop Med, Mexico City 04510, DF, Mexico TI - Role of leptospira interrogans in patients with chronic uveitis - examinations in Mexico MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392102451 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S461-S461 2932 UI - 13191 AU - Fuentes-Cerda CFJ AU - Monforte-Gonzalez M AU - Mendez-Zeel M AU - Rojas-Herrera R AU - Loyola-Vargas VM AD - Ctr Invest Cient Yucatan, Merida 97200, Yucatan, MexicoInst Nacl Ciencias Agr, La Habana, CubaLoyola-Vargas, VM, Ctr Invest Cient Yucatan, Calle 43,130,Col Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Modification of the embryogenic response of Coffea arabica by the nitrogen source AB - Somatic embryogenesis was induced in coffee from in vitro cultured plants as starting material and the faster response obtained allowed lines from selected plants to be generated more quickly. In contrast to other systems, where embryos take 2 or 3 months to develop, globular embryos were obtained after 3 weeks. The optimum nitrogen concentrations for embryogenesis were between 3.75 and 15 mM nitrogen with a nitrate/ammonium molar ratio of 2:1 or 1:2 MH - Cuba MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000170160200012 L2 - Coffea spp.;direct embryogenesis;nitrogen source;somatic embryogenesis;SATIVA; MEDIA SO - Biotechnology Letters 2001 ;23(16):1341-1343 2933 UI - 12772 AU - Fuentes-Yaco C AU - de Leon DAS AU - Monreal-Gomez MA AU - Vera-Herrera F AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Estac Ciudad Carmen, Campeche, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoFuentes-Yaco, C, Bedford Inst Oceanog, POB 1006, Dartmouth, NS B2Y 4A2, Canada TI - Environmental forcing in a tropical estuarine ecosystem: the Palizada River in the southern Gulf of Mexico AB - Environmental characteristics of the fluvial deltaic lagoon estuarine system of the Palizada River were determined by the assessment of physical, environmental and hydrological variability. Environmental information comprised daily time series of precipitation (1971-85), Usumacinta River discharge (1948-94), sea level (1956-91) and wind patterns (1984-87). Hydrology was studied by weekly measurement of salinity, transparency, temperature, dissolved oxygen and pH at 18 stations during 19 months (September 1985 to March 1987). Water temperature reflected the climatic seasons: dry, rainy and winter frontal storms (Nortes). During the rainy season fresh water dominated the whole area, but during the dry season a salt wedge entered as far as Del Este Lagoon. Northern winds allowed saline water to reach intermediate regions and occasionally the upstream freshwater head of the estuary. There are annual, 6-month and 3.2-month oscillations in the environmental records: the annual signal is modulated by precipitation, fluvial discharge and sea level; the 6-month signal has an implicit periodicity driven by the changes in the wind direction that affect all other parameters; and the 3.2-month period seems to be modulated by the rainy, dry and Nortes seasons. Cluster analysis identified eight ecological regions based on the hydrological variables MH - Canada MH - Mexico|Campeche MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 7 U4 - Fisheries;Limnology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1323-1650 UR - ISI:000171168400002 L2 - tropical ecosystem;MARINE ECOSYSTEMS; FRESH-WATER; TERMINOS; LAGUNA; PRODUCTIVITY SO - Marine and Freshwater Research 2001 ;52(5):735-744 2934 UI - 13321 AU - Fuentes SI AU - Allen DJ AU - Ortiz-Lopez A AU - Hernandez G AD - UNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoUSDA ARS, Photosynth Res Unit, Urbana, IL 61801, USAUniv Illinois, Dept Plant Biol, Urbana, IL 61801, USAHernandez, G, UNAM, Ctr Invest Fijac Nitrogeno, Apartado Postal 565-A, Cuernavaca, Morelos, Mexico TI - Over-expression of cytosolic glutamine synthetase increases photosynthesis and growth at low nitrogen concentrations AB - Nitrogen, which is a major limiting nutrient for plant growth, is assimilated as ammonium by the concerted action of glutamine synthetase (GS) and glutamate synthase (GOGAT), GS catalyses the critical incorporation of inorganic ammonium into the amino acid glutamine. Two types of GS isozymes, located in the cytosol (GS(1)) and in the chloroplast (GS(2)) have been identified in plants. Tobacco (Nicotiana tabacum) transformants, over-expressing GS(1) driven by the constitutive CaMV 35S promoter were analysed. GS in leaves of GS-5 and GS-8 plants was up-regulated, at the level of RNA and proteins. These transgenic plants had six times higher leaf GS activity than controls. Under optimum nitrogen fertilization conditions there was no effect of GS over-expression on photosynthesis or growth. However, under nitrogen starvation the GS transgenics had c, 70% higher shoot and c, 100% greater root dry weight as well as 50% more leaf area than low nitrogen controls. This was achieved by the maintenance of photosynthesis at rates indistinguishable from plants under high nitrogen, while photosynthesis in control plants was inhibited by 40-50% by nitrogen deprivation. It was demonstrated that manipulation of GS activity has the potential to maintain crop photosynthetic productivity while reducing nitrogen fertilization and the concomitant pollution MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 34 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000169703400019 L2 - GS1;tobacco;Nicotiana tabacum;transgenic;ammonia assimilation;AMMONIA ASSIMILATION; PHASEOLUS-VULGARIS; TRANSGENIC PLANTS; LEAF SENESCENCE; BRASSICA-NAPUS; MESSENGER-RNA; RICE PLANTS; GENES; TOBACCO; LEAVES SO - Journal of Experimental Botany 2001 ;52(358):1071-1081 2935 UI - 13658 AU - Fundora A AU - Martinez E AU - Amorin H AU - Contreras OE AU - Siqueiros JM AD - Ctr Invest Cient & Educ Super Ensenada, Posgrado Fis Mat, Ensenada, Baja California, MexicoUniv La Habana, Fca Fis IMRE, La Habana 10400, CubaUniv Nacl Autonoma Mexico, Ensenada, Baja California, MexicoFundora, A, Ctr Invest Cient & Educ Super Ensenada, Posgrado Fis Mat, Ensenada, Baja California, Mexico TI - Pb(Mg1/3Nb2/3)(0.97)Ti0.03O3 ferroelectric thin films, deposited by laser ablation on TiN bottom electrodes AB - Pb(Mg1/3Nb2/3)(0.97)Ti0.03O3 (PMNT) polycrystalline thin films were deposited on Titanium Nitride electrodes at different temperatures by laser ablation, using a wavelength of 248 nm. The morphology of the films was analyzed by scanning electron microscopy (SEM). The nature of the ferroelectric layer-electrode interface is studied by transmission electron microscopy (TEM) as well as the effect of its characteristics in the performance of the multilayer system. The influence of the annealing temperature on the dielectric properties was studied by hysteresis and fatigue measurements MH - Cuba MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1385-3449 UR - ISI:000168716300003 L2 - ferroelectric thin films;dielectric properties;microstructural properties;FATIGUE; CERAMICS SO - Journal of Electroceramics 2001 ;6(1):21-25 2936 UI - 11857 AU - Funes-Rodriguez R AU - Hinojosa-Medina A AU - vendano-Ibarra R AU - Hernandez-Rivas M AU - Saldierna-Martinez R AU - Watson W AD - Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja California, MexicoNatl Marine Fisheries Serv, SW Fisheries Sci Ctr, La Jolla, CA 92038, USAFunes-Rodriguez, R, Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Apartado Postal 592, La Paz 23000, Baja California, Mexico TI - Spawning of small pelagic fishes in Bahia Magdalena, Baja California Sur, Mexico, at the beginning of the 1997-1998 El Nino event AB - A study of the seasonal abundance of planktonic eggs and larvae of small pelagic fishes, and relationships of egg and larval abundances with sea surface temperature and zooplankton biomass in Bahia Magdalena, Baja California Sur, Mexico, a subtropical lagoon, was done during the first year of the 1997-1998 El Nino event. Sardinops caeruleus and Scomber japonicus spawned primarily in winter, when sea surface temperature and zooplankton biomass were lowest (19.8-21.0 degreesC; 100-300 ml 1000 m(-3)), while Anchoa spp. and Opisthonema spp. spawned predominantly in late spring, when the sea surface temperature and zooplankton biomass were increasing to their summer maxima (>21.0 degreesC; >300 ml 1000 m(-3)). During the warm, El Nino years of 1983 and 1997, the egg and larval abundances of Opisthonema spp., a taxon of tropical affinity, increased, while those of Sardinops caeruleus, a transitional, California Current species, diminished drastically. This decline for S. caeruleus probably reflected a shift in the spawning distribution of the adults. Diminished commercial catches during 1997 in Bahia Magdalena, coupled with significantly increased catches in the north, off Ensenada, Baja California, provide supporting evidence. (C) 2001 Academic Press MH - Mexico|Baja California MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000173748000004 L2 - El Nino;eggs and fish larvae;Bahia Magdalena;Mexico;CURRENT SYSTEM SO - Estuarine Coastal and Shelf Science 2001 ;53(5):653-664 2937 UI - 12988 AU - Funk TH AU - Chinkin LR AU - Roberts PT AU - Saeger M AU - Mulligan S AU - Figueroa VHP AU - Yarbrough J AD - Sonoma Technol Inc, Petaluma, CA 94954, USAPacific Environm Serv, Res Triangle Pk, NC 27709, USAInst Nacl Ecol, Mexico City 01040, DF, MexicoUS EPA, Dallas, TX 75202, USAFunk, TH, Sonoma Technol Inc, 1360 Redwood Way,Suite C, Petaluma, CA 94954 USA TI - Compilation and evaluation of a Paso del Norte emission inventory AB - Emission inventories of ozone precursors are routinely used as input to comprehensive photochemical air quality models. Photochemical model performance and the development of effective control strategies rely on the accuracy and representativeness of an underlying emission inventory. This paper describes the tasks undertaken to compile and evaluate an ozone precursor emission inventory for the El Paso/Ciudad Juarez/Southern Dona Ana region. Point, area and mobile source emission data were obtained from local government agencies and were spatially and temporally allocated to a gridded domain using region-specific demographic and land-cover information. The inventory was then processed using the US Environmental Protection Agency (EPA) recommended Emissions Preprocessor System 2.0 (UAM-EPS 2.0) which generates emissions files compatible with the Urban Airshed Model (UAM). A top-down evaluation of the emission inventory was performed to examine how well the inventory represented ambient pollutant compositions. The top-down evaluation methodology employed in this study compares emission inventory ratios of non-methane hydrocarbon (NMHC)/nitrogen oxide (NOx) and carbon monoxide (CO)/NOx ratios to corresponding ambient ratios. Detailed NMHC species comparisons were made in order to investigate the relative composition of individual hydrocarbon species in the emission inventory and in the ambient data. The emission inventory compiled during this effort has since been used to model ozone in the Paso del Norte airshed (Emery et at., CANx modeling of ozone and carbon monoxide in the Paso del Norte airshed. In: Proc of Ninety-Third Annual Meeting of Air & Waste Management Association, 18-22 June 2000, Air & Waste Management Association, Pittsburgh, PA, 2000). (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000170533100009 L2 - emission inventory evaluation;NMHC/NOx;CO/NOx;MODEL SO - Science of the Total Environment 2001 ;276(1-3):135-151 2938 UI - 13895 AU - Galan L AU - Ferrer T AU - Artiles A AU - Talavera K AU - Salinas E AU - Orta G AU - Garcia-Barreto D AU - Alvarez JL AD - Inst Cardiol & Cirugia Cardiovasc, Lab Electrofisiol, La Habana, CubaUniv Autonoma Puebla, Inst Fisiol, Lab Fisiol Cardiovasc, Puebla 72570, MexicoAlvarez, JL, Inst Cardiol & Cirugia Cardiovasc, Lab Electrofisiol, La Habana, Cuba TI - Cardiac cellular actions of hydrochlorothiazide AB - In long term treatment, thiazide diuretics such as hydrochlorothiazide (HCTZ) lower blood pressure by decreasing peripheral resistance rather than by their diuretic effect. This action has been attributed to the opening of Ca2+-activated K+ channels in vascular smooth muscle cells. However, little is known about their cardiac cellular actions, Were we investigated the possible actions of HCTZ on action potential and contraction of rat ventricular muscle strips and on the ionic currents of isolated rat ventricular cardiomyocytes. HCTZ depressed ventricular contraction with an IC30 of 1.85 muM (60% decrease at 100 muM). Action potential duration at -60 mV and maximal rate of depolarization were, however, only slightly decreased by 12% and 22%, respectively, at 100 muM. At the single cell level, HCTZ (100 muM) depressed the fast Nat current (I,,) and the L-type Ca2+ current (I-CaL) by 30% and 20%, respectively. The effects on I-CaL were not voltage-or frequency-dependent. In cells intracellularly perfused with 50 muM cyclic adenosine, monophosphate HCTZ reduced I-CaL by 33%. The transient (It,), the delayed rectifier and the inward rectifier potassium currents were decreased by 20% at 100 muM HCTZ. The effects on It, were voltage-dependent, in conclusion, HCTZ at high concentrations possesses a negative inotropic action that could be in part due to its blocking action on I-Na and I-caL The actions of WCTZ on multiple cardiac ionic currents could explain its weak effect on action potential duration MH - Cuba MH - Mexico|Puebla PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0767-3981 UR - ISI:000168221900002 L2 - calcium channels;diuretics;heart;hydrochlorothiazide;patch-clamp;potassium channels;DIURETIC AGENT INDAPAMIDE; PARATHYROID-HORMONE; THIAZIDE DIURETICS; IN-VITRO; CELLS; ARTERIES; MYOCYTES; PLASMA SO - Fundamental & Clinical Pharmacology 2001 ;15(1):9-17 2939 UI - 13364 AU - Galano A AU - varez-Idaboy JR AU - Montero LA AU - Vivier-Bunge A AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoUniv La Habana, Fac Quim, Lab Quim Computat & Teor, La Habana 10400, CubaAlvarez-Idaboy, JR, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - OH hydrogen abstraction reactions from alanine and glycine: A quantum mechanical approach AB - Density functional theory (B3LYP and BHandHLYP) and unrestricted second-order Moller-Plesset (MP2) calculations have been performed using 3-21G, 6-31G(d,p), and 6-311 G(2d,2p) basis sets, to study the OH hydrogen abstraction reaction from alanine and glycine. The structures of the different stationary points are discussed. Ring-like structures are found for all the transition states. Reaction profiles are modeled including the formation of prereactive complexes, and very low or negative net energy barriers are obtained depending on the method and on the reacting site. ZPE and thermal corrections to the energy for all the species, and BSSE corrections for B3LYP activation energies are included. A complex mechanism involving the formation of a prereactive complex is proposed, and the rate coefficients for the overall reactions are calculated using classical transition state theory. The predicted values of the rate coefficients are 3.54 x 10(8) L (.) mol(-1) (.) s(-1) for glycine and 1.38 x 10(9) L (.) mol(-1) (.) s(-1) for alanine. (C) 2001 John Wiley & Sons, Inc MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000169654300002 L2 - hydroxyl radical;glycine;alanine;amino acids;abstraction reaction;rate coefficients;DENSITY-FUNCTIONAL THEORY; TRANSITION-STATE THEORY; AB-INITIO; RATE CONSTANTS; AMINO-ACIDS; RADICALS; BOND; REACTIVITY; OXIDATION; ETHYLENE SO - Journal of Computational Chemistry 2001 ;22(11):1138-1153 2940 UI - 11616 AU - Galaz-Fontes F AU - Gross L AU - Sontz SB AD - Ctr Invest & Matemat, Guanajuato 36240, MexicoCornell Univ, Dept Math, Ithaca, NY 14853, USAUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, Mexico TI - Reverse hypercontractivity over manifolds AB - Suppose that X is a vector field on a manifold M whose flow, exp tX, exist, for all time. If mu is a measure on M for which the induced measures mu(t) = (exp t X)(*)mu are absolutely continuous with respect to mu. it is of interest to establish bounds on the L-p(mu) norm of the Radon Nikodym derivative dmu(t)/dmu. We establish such bounds in terms of the divergence of the vector field X. We then specialize M to he a complex manifold and derive reverse hypercontractivity hounds and reverse logarithmic Sobolev inequalities in some holomorphic function spaces. We give examples on C-m and on the Riemann surface for z(1/n) MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - DJURSHOLM: INST MITTAG LEFFLER RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0004-2080 UR - ISI:000174336900005 L2 - LOGARITHMIC SOBOLEV INEQUALITIES; DIFFERENTIAL-EQUATIONS; WIENER SPACE SO - Arkiv for Matematik 2001 ;39(2):283-309 2941 UI - 14216 AU - Galindo-Uribarri A AU - del Campo JG AU - Beene JR AU - Gross CJ AU - Halbert ML AU - Liang JF AU - Paul SD AU - Shapira D AU - Stracener DW AU - Varner RL AU - Chavez E AU - Ortiz ME AD - Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAOak Ridge Inst Sci & Educ, Oak Ridge, TN 37831, USAUNAM, Inst Fis, Mexico City 04510, DF, MexicoGalindo-Uribarri, A, Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA TI - Study of resonant reactions with radioactive ion beams and observation of simultaneous 2p emission AB - A program to study resonant states in light nuclei with radioactive ion beams in inverse kinematics and using thick targets together with double-sided silicon strip detectors (DSSDs) has been started at the Holifield Radioactive Ion Beam Facility (HRIBF). This program has led to the discovery of the simultaneous two-proton decay from states in Ne-18 populated by F-17 + p. Results from our search for this long sought decay mode will be presented MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000167202500047 L2 - 2-PROTON EMISSION; SCATTERING; TARGETS; STATE; NE-18 SO - Nuclear Physics A 2001 ;682():363C-368C 2942 UI - 11855 AU - Gallardo JR AU - Makrakis D AU - Angulo M AD - Univ Ottawa, Sch Informat Technol & Engn, Broadband Wireless & Internetworking Res Lab, Ottawa, ON K1N 6N5, CanadaUniv Autonoma Baja California, Fac Engn, Mexicali 21100, Baja California, MexicoGallardo, JR, CICESE Res Ctr, Elect & Telecommun Dept, Ensenada 22860, Baja California, Mexico TI - Dynamic resource management considering the real behavior of aggregate traffic AB - This paper explains why the theory of effective bandwidth is in general not applicable to characterize realistic traffic sources. Moreover, we show that a static allocation of network resources (bandwidth and/or buffer space) based on large deviation theory can be highly inefficient when the real statistical behavior of traffic is taken into account. As an alternative; we propose a dynamic resource management scheme based on prediction techniques. As a specific example, we apply this scheme to a Differentiated Service (DiffServ) Internet environment, in which the goal, besides policing the incoming traffic, is to optimize the use of network resources, thus minimizing the probability of occurrence of violations of contract guarantees. The performance of the proposed scheme is evaluated via simulations and our results show the superior performance of the new algorithm in terms of buffer overflows, output link utilization, and jitter, as compared to currently used policing and shaping mechanisms MH - Canada MH - Mexico|Baja California PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 11 U4 - Computer Science, Information Systems;Computer Science, Software Engineering;Telecommunications U5 - J;Article AV - English IS - 1520-9210 UR - ISI:000173707800001 L2 - alpha-stable self-similar processes;dynamic resource management;effective bandwidth theory;prediction techniques;traffic modeling;traffic policing and shaping;NETWORKS; QUEUE SO - Ieee Transactions on Multimedia 2001 ;3(2):177-185 2943 UI - 13904 AU - Galli D AU - Shu FH AU - Laughlin G AU - Lizano S AD - Osservatorio Astrofis Arcetri, I-50125 Florence, ItalyUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USAUNAM, Inst Astron, Mexico City 4510, DF, MexicoGalli, D, Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy TI - Singular isothermal disks. II. Nonaxisymmetric bifurcations and equilibria AB - We review the difficulties of the classical fission and fragmentation hypotheses for the formation of binary and multiple stars. A crucial missing ingredient in previous theoretical studies is the inclusion of dynamically important levels of magnetic fields. As a minimal model for a candidate precursor to the formation of binary and multiple stars, we therefore formulate and solve the problem of the equilibria of isopedically magnetized, singular isothermal disks, without the assumption of axial symmetry. Considerable analytical progress can be made if we restrict our attention to models that are scale-free, i.e., that have surface densities that vary inversely with distance <()over bar> from the rotation axis of the system. In agreement with earlier analysis by Syer & Tremaine, we find that lopsided (M = 1) configurations exist at any dimensionless rotation rate, including zero. Multiple-lobed (M = 2, 3, 4,...) configurations bifurcate from an underlying axisymmetric sequence at progressively higher dimensionless rates of rotation, but such nonaxisymmetric sequences always terminate in shock waves before they have a chance to fission into M = 2, 3, 4,... separate bodies. On the basis of our experience in this paper and the preceding Paper I, we advance the hypothesis that binary and multiple star formation from smooth (i.e., not highly turbulent) starting states that are supercritical but in unstable mechanical balance requires the rapid (i.e., dynamical) loss of magnetic flux at some stage of the ensuing gravitational collapse MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 29 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000168152200032 L2 - binaries : general;hydrodynamics;ISM : clouds;ISM : molecules;MHD;stars : formation;DENSE INTERSTELLAR CLOUDS; STAR-FORMING REGIONS; T-TAURI STARS; PROTOSTELLAR DISKS; MOLECULAR CLOUDS; MAGNETIC-FIELDS; DARK CLOUDS; IMAGING SURVEY; CORES; MULTIPLICITY SO - Astrophysical Journal 2001 ;551(1):367-386 2944 UI - 12841 AU - Galvan-Tejada GM AU - Gardiner JG AD - IPN, CINVESTAV, Secc Comunicac, Mexico City 07360, DF, MexicoUniv Bradford, Dept Elect & Telecommun, Bradford BD7 1DP, W Yorkshire, EnglandGalvan-Tejada, GM, IPN, CINVESTAV, Secc Comunicac, Mexico City 07360, DF, Mexico TI - Theoretical model to determine the blocking probability for SDMA systems AB - Antenna array technology has recently attracted the attention of the research community as a means to increase system capacity and improve the signal reception. Space division multiple access (SDMA) is a multi-access scheme based on the use of antenna arrays to separate users by exploiting their positions in space. Several works have been carried out to examine the improvement in the system capacity provided by SDMA. In this paper, a theoretical model to determine the blocking probability for SDMA is derived. A closed-form linear system of equations is obtained whose numerical solution gives the blocking probability. The formulation is employed to assess the capacity gain improvement of a single-cell system under specific conditions. It is found from the results that SDMA is not efficient for low traffic loads, whereas it is so for high traffic MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Telecommunications;Transportation Science & Technology U5 - J;Article AV - English IS - 0018-9545 UR - ISI:000171025900010 L2 - antenna arrays;blocking probability;multiple access;space division multiple access (SDMA);ANTENNAS; CDMA SO - Ieee Transactions on Vehicular Technology 2001 ;50(5):1279-1288 2945 UI - 12970 AU - Galvan A AU - Cooray V AU - Thottappillil R AD - Uppsala Univ, Inst High Voltage Res, Uppsala, SwedenInst Invest Elect, Temixco, Morelos, MexicoGalvan, A, Uppsala Univ, Inst High Voltage Res, Uppsala, Sweden TI - A technique for the evaluation of lightning-induced voltages in complex low-voltage power-installation networks AB - In order to gain knowledge of the effects of lightning-electromagnetic field pulses (LEMP)in low-voltage power installations (LVPIs), the transient response of two electrical networks was measured when they were exposed to lightning electromagnetic fields in the summer of 1998. Both networks were isolated from the energy supply. One network was a simple circuit installed in a room of a single storey wooden residential house and the other consisted of the house's whole electrical wiring circuit. The main goal of this paper is to develop a practical method with which to estimate the transient response of LVPIs to LEMP. The method uses the information contained in a small portion of the time domain waveform of the electric field, which can be approximated as a unit step function and the corresponding induced voltage, which, in turn can be approximated as the unit step response. It is shown how this unit step response can be used in determining the induced overvoltage in the network due to any complex electric-field waveform. Advantages, limitations and considerations associated with the application of this method are also discussed MH - Mexico|Morelos MH - Sweden PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0018-9375 UR - ISI:000170650500016 L2 - lightning electromagnetic fields;lightning-induced voltages;linear systems;low-voltage power installations;time-domain technique SO - Ieee Transactions on Electromagnetic Compatibility 2001 ;43(3):402-409 2946 UI - 14273 AU - Galvan A AU - Floran B AU - Erlij D AU - Aceves J AD - Inst Politecn Nacl, Ctr Invest & Estud Avanzados, Dept Fisiol Biofis & Neurociencias, Mexico City, DF, MexicoSuny Downstate Med Ctr, Dept Physiol, Brooklyn, NY 11203, USAAceves, J, IPN, CINVESTAV, Dept Physiol, Apartado Postal 14-740, Mexico City 07300, DF, Mexico TI - Intrapallidal dopamine restores motor deficits induced by 6-hydroxydopamine in the rat AB - To explore whether dopamine deficits in the globus pallidus have a role in generating the motor symptoms of Parkinson's disease, we examined the effects of selective intrapallidal administration of dopamine or its antagonists in rats unilaterally lesioned with 6-hydroxydopamine into the medial forebrain bundle. Either the turning behavior induced by apomorphine or the deficit in the performance of a skilled forelimb-reaching task was used as assay for drug action. Microinjection of either the D2 receptor antagonist, sulpiride, or the D1 receptor antagonist, SCH-23390, into the dopamine-denervated pallidum significantly reduced apomorphine induced turning. In animals trained to perform a skilled forelimb-reaching task, 6-OHDA lesions caused a marked motor deficit in the contralateral forelimb. Intrapallidal dopamine applied either intermittently or continuously, restored up to 50% of the motor performance. Continuous application promoted a motor recovery that outlasted dopamine administration. These results show that lack of dopamine in the GP plays an important role in generating the motor symptoms caused by lesion of dopaminergic pathways. Moreover, motor recovery was produced by selectively injecting dopamine into the globus pallidus MH - Mexico|Distrito Federal MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 16 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0300-9564 UR - ISI:000167014500003 L2 - dopamine;dopamine D1 receptors;dopamine D2 receptors;GABA;globus pallidus;Parkinson's disease;turning behavior;staircase test;RECEPTOR MESSENGER-RNA; INSITU HYBRIDIZATION HISTOCHEMISTRY; RETICULAR THALAMIC NUCLEUS; GLOBUS-PALLIDUS; BASAL GANGLIA; SUBSTANTIA-NIGRA; SUBTHALAMIC NUCLEUS; BEHAVIORAL RECOVERY; PARKINSON-MODEL; INTRACEREBRAL INJECTIONS SO - Journal of Neural Transmission 2001 ;108(2):153-166 2947 UI - 13278 AU - Galvan DH AU - Kim JH AU - Maple MB AU - Adem E AD - Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093, USAUniv Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoGalvan, DH, Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA TI - Effect of electronic irradiation in the production of NbSe2 nanotubes AB - In this work, we report the production of NbSe2 (niobium diselenide) nanotubes formed by irradiating NbSe2 with high doses of electron irradiation. The apparatus used for the irradiation was a 2 MeV Van de Graaff accelerator at the following conditions: voltage 1.3 MeV, current 5 muA, dose rate 25 kGy/min, and total dosage 1000 kGy. These conditions were maintained fixed while irradiation dosage was changed between 100, 250 and 500 Mrad. We observed enormous and very well defined nanotubes with a length of several nm and width of a few nm, which are hollow and capped at one end. As the level of irradiation is increased to 500 Mrad, onion-like structures were observed MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1064-122X UR - ISI:000169925300010 L2 - ONIONS; WS2 SO - Fullerene Science and Technology 2001 ;9(2):225-232 2948 UI - 12575 AU - Galvao RMO AU - Kuznetsov YK AU - Nascimento IC AU - Sanada E AU - Campos DO AU - Elfimov AG AU - Elizondo JI AU - Fagundes AN AU - Ferreira AA AU - Fonseca AMM AU - Lerche EA AU - Lopez R AU - Ruchko LF AU - De Sa WP AU - Saettone EA AU - Severo JHF AU - da Silva RP AU - Tsypin VS AU - Valencia R AU - Vannucci A AD - Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, BrazilInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoGalvao, RMO, Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, Brazil TI - New regime of runaway discharges in tokamaks AB - A new regime of runaway discharges has been found in TCABR (Tokamak Chauffage Alfven Bresilien). This regime is obtained by initiating the discharge with low filling pressure and, after the initial current rise, maintaining a large filling rate. The line density reaches a maximum value around 2 x 10(19) m(-3), during the current ramp-up phase, and then drops by a factor of around four in the quasi-stationary phase of the discharge, when a new regime is achieved. The most distinctive features of this regime, as compared to 'conventional' runaway discharges reported in the literature, are (i) maintenance of the runaway discharge, with the plasma current almost entirely provided by the runaway beam, in a cold background plasma and with strong neutral gas injection; (ii) enhancement of the relaxation instability with strong spikes in the Ha emission and loop voltage correlated with sawtooth relaxation of the line density; and (iii) plasma detachment from the limiter. A simple phenomenological model, based upon straightforward particle and energy balance calculations, is proposed to explain the experimental observations. According to this model, the plasma is rather cold and the short pulses of gas ionization and the related density spikes are due to sudden plasma heating caused by the relaxation instability. Furthermore, it seems that the runaway generation for the conditions of the experiments can be explained only if the secondary generation process is invoked MH - Brazil MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Fluids & Plasmas;Physics, Nuclear U5 - J;Article AV - English IS - 0741-3335 UR - ISI:000171635700002 L2 - ELECTRONS; DISRUPTIONS; TRANSPORT; AVALANCHE; TEXTOR SO - Plasma Physics and Controlled Fusion 2001 ;43(9):1181-1190 2949 UI - 12298 AU - Gamboa SA AU - Sebastian PJ AU - Geng M AU - Northwood DO AD - UNAM, Solar Energy Lab, Photovoltaic Syst Grp, CIE, Temixco 62580, Morelos, MexicoUniv Windsor, Windsor, ON N9B 3P4, CanadaRyerson Polytech Univ, Fac Engn & Appl Sci, Toronto, ON M5B 2K3, CanadaSebastian, PJ, UNAM, Solar Energy Lab, Photovoltaic Syst Grp, CIE, Privada Xochicalco S-N, Temixco 62580, Morelos, Mexico TI - Temperature, cycling, discharge current and self-discharge electrochemical studies to evaluate the performance of a pellet metal-hydride electrode AB - In this paper, we report electrochemical charge/discharge of hydrogen for a pellet metal-hydride electrode using an MmNi(5-x)M(x) alloy as active material. Strong dependence of temperature and discharge current was found for electrochemical applications. Pellet electrode showed good stability over 250 charge/discharge cycles. Self-discharge studies were carried out on completely charged electrode. The capacity of this electrode to absorb/desorb hydrogen could be defined as a stochastic function of some variables like temperature, cycling and discharge current conditions. More studies are in progress for calculating electrochemical parameters in these metal-hydride electrode systems. (C) 2001 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000172479800010 L2 - metal-hydride electrode;Ni-MH battery;self-discharge;MmNi(5-X)M(X);electrochemical measurements;ALLOY ELECTRODES; BATTERIES; LIFE SO - International Journal of Hydrogen Energy 2001 ;26(12):1315-1318 2950 UI - 13060 AU - Gamio JC AU - Yang WQ AU - Stott AL AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUMIST, Dept Elect Engn & Elect, Manchester M60 1QD, Lancs, EnglandGamio, JC, Inst Mexicano Petr, Eje Cent L Cardenas Norte 152, Mexico City 07730, DF, Mexico TI - Analysis of non-ideal characteristics of an ac-based capacitance transducer for tomography AB - An ac-based capacitance transducer has been designed for use in electrical capacitance tomography systems. It has a high signal-to-noise ratio and good stray-immunity, compared with a charge/discharge transducer designed for the same purpose. However. the non-ideal characteristics of amplifiers and CMOS switches limit the performance of the ac-based transducer, This paper analyses the effects of the frequency-dependent gain of the amplifiers and the finite 'on' resistance of the CMOS switches. It is shown that the non-ideal characteristics restrict the frequency response of the transducer by introducing extra poles. which depend not only on the parameters of the devices but also on the stray capacitance. Mathematical expressions quantifying these effects are presented MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Multidisciplinary;Instruments & Instrumentation U5 - J;Article AV - English IS - 0957-0233 UR - ISI:000170491300014 L2 - capacitance measurement;frequency analysis;operational amplifier;tomography;SYSTEM; DESIGN SO - Measurement Science & Technology 2001 ;12(8):1076-1082 2951 UI - 12441 AU - Gao JL AU - Terefework ZD AU - Chen WX AU - Lindstrom K AD - China Agr Univ, Coll Biol Sci, Dept Microbiol, Beijing 100094, Peoples R ChinaUniv Helsinki, Bioctr 1, Dept Appl Chem & Microbiol, FIN-00014 Helsinki, FinlandGao, JL, UNAM, CIFN, Av Univ S-N,Colonia Chamilpa,Apdo Postal 565-A, Cuernavaca 62210, Morelos, Mexico TI - Genetic diversity of rhizobia isolated from Astragalus adsurgens growing in different geographical regions of China AB - The genetic diversity among 95 isolates from Astragalus adsurgens was investigated using molecular biological methods. All of the isolates and 24 reference strains could be differentiated by AFLP, REP-, ERIC- and BOX-PCR fingerprinting analysis. By cluster analysis of the data, 31 AFLP and 38 Rep-PCR genomic groups were delineated, indicating considerable genetic diversity among the isolates. Fifty-four representative strains were further analyzed by RFLP of PCR-amplified 16S and 23S rDNA, revealing 26 rDNA genotypes among the isolates. The phylogenetic relationship of the isolates was. determined by partial sequencing of 16S rRNA genes of 16 strains. The results suggest that the A. adsurgens rhizobia belong to the genera Agrobacterium, Mesorhizobium, Rhizobium and Sinorhizobium. (C) 2001 Elsevier Science B.V. All rights reserved MH - Finland MH - Mexico|Morelos MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0168-1656 UR - ISI:000172019000007 L2 - Astragalus adsurgens;rhizobia;diversity;PCR fingerprinting;phylogeny;POLYMERASE CHAIN-REACTION; SP-NOV; ROOT-NODULES; NUMERICAL TAXONOMY; DNA; BACTERIA; SEQUENCES; GALEGAE; FINGERPRINT; PHYLOGENY SO - Journal of Biotechnology 2001 ;91(2-3):155-168 2952 UI - 13182 AU - Gao RS AU - Richard EC AU - Popp PJ AU - Toon GC AU - Hurst DF AU - Newman PA AU - Holecek JC AU - Northway MJ AU - Fahey DW AU - Danilin MY AU - Sen B AU - Aikin K AU - Romashkin PA AU - Elkins JW AU - Webster CR AU - Schauffler SM AU - Greenblatt JB AU - McElroy CT AU - Lait LR AU - Bui TP AU - Baumgardner D AD - NOAA, Aeron Lab, Boulder, CO 80305, USAUniv Colorado, CIRES, Boulder, CO 80303, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USANOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80305, USANASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAAtmospher & Environm Res Inc, Lexington, MA 02421, USANatl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USAAtmospher Environm Serv, Downsview, ON, CanadaUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoGao, RS, NOAA, Aeron Lab, Boulder, CO 80305, USA TI - Observational evidence for the role of denitrification in Arctic stratospheric ozone loss AB - Severe and extensive denitrification, chlorine activation, and photochemical ozone loss were observed throughout the lower stratosphere in the 1999-2000 Arctic vortex. A large number of air parcels sampled between late February and mid-March, 2000, were photochemically intercomparable for chemical O-3 loss rates. In these air parcels, the temporal evolution of the correlations Of O-3 with the NOy remaining after denitrification provides strong evidence for the role of NOy in moderating O-3 destruction. In 71%-denitrified air parcels, a chemical O-3 destruction rate of 63 ppbv/day was calculated, while in 43%-denitrified air parcels the destruction rate was only 43 ppbv/day. These observational results show that representative denitrification models will be required for accurate prediction of future Arctic O-3 changes MH - Canada MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 27 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000170157400002 L2 - POLAR VORTEX; WINTER; RECOVERY; DEPLETION; AEROSOL SO - Geophysical Research Letters 2001 ;28(15):2879-2882 2953 UI - 11034 AU - Gao ZC AU - Urrutia J AU - Wang JY AD - Carleton Univ, Dept Math & Stat, Ottawa, ON K1S 5B6, CanadaUniv Ottawa, Sch Informat Technol & Engn, Ottawa, ON K1N 6N5, CanadaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoGao, ZC, Carleton Univ, Dept Math & Stat, Ottawa, ON K1S 5B6, Canada TI - Diagonal flips in labelled planar triangulations AB - A classical result of Wagner states that any two (unlabelled) planar triangulations with the same number of vertices can be transformed into each other by a finite sequence of diagonal flips. Recently Komuro gives a linear bound on the maximum number of diagonal flips needed for such a transformation. In this paper we show that any two labelled triangulations can be transformed into each other using at most O(n log n) diagonal flips. We will also show that any planar triangulation with n > 4 vertices has at least n - 2 flippable edges. Finally, we prove that if the minimum degree of a triangulation is at least 4, then it contains at least 2n + 3 flippable edges. These bounds can be achieved by an infinite class of triangulations MH - Canada MH - Mexico|Distrito Federal PB - TOKYO: SPRINGER-VERLAG TOKYO RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0911-0119 UR - ISI:000175898600006 L2 - CLOSED SURFACES SO - Graphs and Combinatorics 2001 ;17(4):647-657 2954 UI - 14169 AU - Garcia-Alcocer G AU - Garcia-Colunga J AU - Martinez-Torres A AU - Miledi R AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla 76001, Queretaro, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USAUniv Autonoma Queretaro, Fac Quim, Queretaro 76010, MexicoMiledi, R, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Apartado Postal 1-1141, Juriquilla 76001, Queretaro, Mexico TI - Characteristics of glycine receptors expressed by embryonic rat brain mRNAs AB - A study was made of glycine (Gly) and gamma -aminobutyric acid (GABA) receptors expressed in Xenopus oocytes injected with rat mRNAs isolated from the encephalon, midbrain, and brainstem of 18-day-old rat embryos. In oocytes injected with encephalon, midbrain, or brainstem mRNAs, the Gly-current amplitudes (membrane current elicited by Gly; 1 mM Gly) were respectively 115 +/- 35, 346 +/- 28, and 389 +/- 22 nA, whereas the GABA-currents (1 mM GABA) were all less than or equal to 40 nA. Moreover, the Gly-currents desensitized faster in oocytes injected with encephalon or brainstem mRNAs. The EC50 for Gly was 611 +/- 77 muM for encephalon, 661 +/- 28 muM for midbrain, and 506 +/- 18 muM for brainstem mRNA-injected oocytes, and the corresponding Hill coefficients were all approximate to2. Strychnine inhibited all of the Gly-currents, with an IC50 of 56 +/- 3 nM for encephalon, 97 +/- 4 nM for midbrain, and 72 +/- 4 nM for brainstem mRNAs. During repetitive Gly applications, the Gly-currents were potentiated by 1.6-fold for encephalon, 2.1-fold for midbrain, and 1.3-fold for brainstem RNA-injected oocytes. Raising the extracellular Ca2+ concentration significantly increased the Cry-currents in oocytes injected with midbrain and brainstem mRNAs. Reverse transcription-PCR studies showed differences in the Gly receptor (GlyR) cu-subunits expressed, whereas the P-subunit was present in all three types of mRNA. These results indicate differential expression of GlyR mRNAs in the brain areas examined, and these mRNAs lead to the expression of GlyRs that have different properties. The modulation of GlyRs by Ca2+ could play important functions during brain development MH - Mexico|Queretaro MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000167258900121 L2 - SUBUNIT MESSENGER-RNAS; XENOPUS-OOCYTES; SPINAL-CORD; GABA; ADULT; MODULATION; MEMBRANE; CALCIUM SO - Proceedings of the National Academy of Sciences of the United States of America 2001 ;98(5):2781-2785 2955 UI - 14220 AU - Garcia-Caballero A AU - Olivares-Reyes JA AU - Catt KJ AU - Garcia-Sainz JA AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoNICHHD, Endocrinol & Reprod Res Branch, NIH, Bethesda, MD 20892, USAGarcia-Sainz, JA, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Ap Postal 70-248, Mexico City 04510, DF, Mexico TI - Angiotensin AT(1) receptor phosphorylation and desensitization in a hepatic cell line. Roles of protein kinase C and phosphoinositide 3-kinase AB - Desensitization and phosphorylation of the endogenous angiotensin II AT(1) receptor were studied in clone 9 liver cells. Agonist activation of AT(1) receptors blunted the response to subsequent addition of angiotensin II. Partial inhibition of the angiotensin II-induced calcium response was observed when cells were pretreated with dibutyryl cyclic AMP, tetradecanoyl phorbol acetate (TPA), vasopressin, or lysophosphatidic acid. All of these desensitization processes were associated with receptor phosphorylation. Angiotensin II-induced AT(1) receptor phosphorylation was partially blocked by the protein kinase C inhibitor bisindolylmaleimide I and by phosphoinositide 3-kinase inhibitors (wortmannin and LY294002); the actions of these inhibitors were not additive. Pertussis toxin pretreatment of cells also partially inhibited angiotensin II-induced AT(1) receptor phosphorylation. TPA-induced AT(1) receptor phosphorylation was completely blocked by bisindolylmaleimide I. AT(1) receptor phosphorylation was also induced by vasopressin and lysophosphatidic acid, and these effects were partially inhibited by bisindolylmaleimide I. Angiotensin II increased Akt/PKB (protein kinase B) phosphorylation and protein kinase C membrane association. The effect on Akt/PKB phosphorylation was blocked by phosphoinositide 3-kinase inhibitors. These findings indicate that clone 9 cells exhibit both homologous and heterologous desensitization in association with AT(1) receptor phosphorylation. In these hepatic cells, angiotensin II-induced receptor phosphorylation involves pertussis toxin-sensitive and -snsensitive G proteins, and is mediated in part through protein kinase C and phosphoinositide 3-kinase MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 15 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0026-895X UR - ISI:000167151800022 L2 - AGONIST-INDUCED PHOSPHORYLATION; ADRENAL GLOMERULOSA CELLS; RAT-LIVER CELLS; II RECEPTOR; INDUCED INTERNALIZATION; CYTOPLASMIC TAIL; PERTUSSIS TOXIN; ACTIVATION; EXPRESSION; IDENTIFICATION SO - Molecular Pharmacology 2001 ;59(3):576-585 2956 UI - 13916 AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Cervera R AU - Trejo O AU - Yague J AU - Siso A AU - Jimenez S AU - de la Red G AU - Font J AU - Ingelmo M AD - Univ Barcelona, Sch Med, Hosp Clin, Systemat Autoimmune Dis Unit, Barcelona, SpainUniv Barcelona, Sch Med, Hosp Clin, Dept Immunol, Barcelona, SpainUniv Barcelona, Sch Med, Hosp Clin, Dept Med,Inst Invest Biomed August Pi & Sunyer, Barcelona, SpainBenemerita Univ Autonoma Puebla, Sch Med, Rheumatol Unit, Puebla, MexicoFont, J, Hosp Clin, Unit Malalties Autoimmunes Sistemiques, C-Villarroel 170, Barcelona 08036, Spain TI - Cryoglobulinemia in systemic lupus erythematosus: Prevalence and clinical characteristics in a series of 122 patients AB - Objectives: To determine the prevalence and nature of cryoglobulins in 122 patients with systemic lupus erythematosus (SLE) and identify the clinical and immunologic features related to their presence. Methods: In a cross-sectional study, we investigated 122 consecutive patients (106 women and 16 men) with SLE who fulfilled the 1982 revised criteria of the American College of Rheumatology for the classification of SLE. All patients had documented medical histories and underwent a medical interview as well as a routine general physical examination by a qualified internist, and their clinical and serologic characteristics were collected on a protocol form. Serum samples were obtained at 37 degreesC, and cryoglobulinemia was estimated by centrifugation at 4 degreesC after incubation for 7 days in all patients. The type of cryoglobulinemia was identified by agarose gel electrophoresis and immunofixation. Results: Cryoglobulins were detected in the sera of 31 SLE patients (25%): 20 patients (65%) had a cryocrit lower than 1%, 8 (26%) had percentages ranging between 1% and 5%, and only 3 patients (9%) had a cryocrit over 5%. Only cutaneous vasculitis (39% v 16%; P = .01) was more prevalent in patients with than in those without cryoglobulins, Rheumatoid factor (RF) (42% v 15%; P = .002) and low CH50 levels (84% v 49%; P < .001) were more prevalent in SLE patients with cryoglobulins. Hepatitis C virus (HCV) infection was investigated in 24 of the 31 cryoglobulinemic SLE patients and was detected in 5 (21%). In comparison, 4 (5%) of the 75 noncryoglobulinemic SLE patients studied were positive (P = 0.035; odds ratio, 4.67). Patients with a cryocrit greater than 1% showed a higher frequency of HCV infection than those with a cryocrit less than or equal to 1% (46% v 0%, P = .01). Conclusions: Cutaneous vasculitis, RF, hypocomplementemia, and HCV infection were associated with cryoglobulins in SLE patients. Testing for HCV infection is therefore recommended for patients with SLE and cryoglobulinemia to identify this subset of patients for prognostic and therapeutic reasons. Semin Arthritis Rheum 30:366-373. Copyright (C) 2001 by W.B. Saunders Company MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 12 U4 - Rheumatology U5 - J;Review AV - English IS - 0049-0172 UR - ISI:000168081600007 L2 - cryoglobulinemia;systemic lupus erythematosus;hepatitis C virus;PRIMARY SJOGRENS-SYNDROME; HEPATITIS-C VIRUS; MIXED CRYOGLOBULINEMIA; ANTICARDIOLIPIN ANTIBODIES; ISOTYPE DISTRIBUTION; CRITERIA; DISEASE SO - Seminars in Arthritis and Rheumatism 2001 ;30(5):366-373 2957 UI - 14498 AU - Garcia-Colunga J AU - Gonzalez-Herrera M AU - Miledi R AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla 76001, Queretaro, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USAMiledi, R, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Juriquilla 76001, Queretaro, Mexico TI - Modulation of alpha 2 beta 4 neuronal nicotinic acetylcholine receptors by zinc AB - A study was made of the modulation of nicotinic acetylcholine receptors by the divalent cation zinc. Rat neuronal nicotinic receptors (alpha2 beta4) were expressed in Xenopus oocytes and membrane currents evoked by acetylcholine (ACh currents) were recorded using a two microelectrode voltage clamp. In non-injected oocytes, or in oocytes expressing alpha2 beta4 receptors, Zn2+ by itself (1 muM-4 mM) generated only very small membrane currents. In contrast, in oocytes expressing alpha2 beta4 receptors, Zn2+ greatly and reversibly increased the ACh current, without affecting considerably its time course. The ACh current potentiation by Zn2+ was weakly dependent on the membrane potential (2.33 +/- 0.10 times the control current at -100 mV vs 2.04 +/- 0.06 at -60 mV, suggesting that Zn2+ interacts with the receptor in the vestibule of the ion channel or at an external domain of the protein. The inward rectification of control and Zn2+-potentiated ACh-currents was similar. We conclude that Zn2+ positively and reversibly modulates neuronal nicotinic receptors in a practically voltage-independent manner and without affecting their rate of desensitization. These results will help to understand better the roles played by Zn2+ in brain functions. NeuroReport 12:147-150 (C) 2001 Lippincott Williams & Wilkins MH - Mexico|Queretaro MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000166411900032 L2 - neuronal receptors;receptor potentiation;Xenopus oocytes;zinc modulation;HIPPOCAMPAL-NEURONS; BLOCKAGE; ALPHA(7); AGONIST; MUSCLE; IONS; 5-HYDROXYTRYPTAMINE; PERMEABILITY; INHIBITION; LANTHANUM SO - Neuroreport 2001 ;12(1):147-150 2958 UI - 12238 AU - Garcia-Compean H AU - Plebanski JF AD - Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540, USAIPN, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoGarcia-Compean, H, Inst Adv Study, Sch Nat Sci, Olden Lane, Princeton, NJ 08540 USA TI - D-branes on group manifolds and deformation quantization AB - Recently M. Kontsevich found a combinatorial formula defining a star-product of deformation quantization for any Poisson manifold. Kontsevich's formula has been reinterpreted physically as quantum correlation functions of a topological sigma model for open strings as well as in the context of D-branes in flat backgrounds with a Neveu-Schwarz B-field. Here the corresponding Kontsevich's formula for the dual of a Lie algebra is derived in terms of the formalism of D-branes on group manifolds. In particular we show that that formula is encoded at the two-point correlation functions of the Wess-Zumino-Witten effective theory with Dirichlet boundary conditions. The B-field entering in the formalism plays an important role in this derivation. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000172602000004 L2 - OPEN STRINGS; LIE-ALGEBRA; STAR-PRODUCTS; MATRIX MODEL; GEOMETRY; FIELD; WEYL SO - Nuclear Physics B 2001 ;618(1-2):81-98 2959 UI - 13424 AU - Garcia-Compean H AU - Plebanski JF AU - Przanowski M AU - Turrubiates FJ AD - Inst Politecn Nacl, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoLodz Tech Univ, Inst Phys, PL-93005 Lodz, PolandInst Politecn Nacl, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoGarcia-Compean, H, Inst Politecn Nacl, Dept Fis, Ctr Invest & Estudios Avanzados, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Deformation quantization of classical fields AB - We study the deformation quantization of scalar and Abelian gauge classical free fields. Stratonovich-Weyl quantizer, star products and Wigner functionals are obtained in field and oscillator variables. The Abelian gauge theory is particularly intriguing since the Wigner functional is factorized into a physical part and the other one containing the constraints only. Some effects of nontrivial topology within the deformation quantization formalism are also considered MH - Mexico|Distrito Federal MH - Poland PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000169549500005 L2 - deformation quantization;field theory;QUANTUM-MECHANICS; PHASE-SPACE; REPRESENTATION; MANIFOLDS; TIME SO - International Journal of Modern Physics A 2001 ;16(14):2533-2558 2960 UI - 13115 AU - Garcia-Esquivel Z AU - Bricelj VM AU - Gonzalez-Gomez MA AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoNatl Res Council Canada, Inst Marine Biosci, Halifax, NS B3H 3Z1, CanadaGarcia-Esquivel, Z, Univ Autonoma Baja California, Inst Invest Oceanol, Apdo Postal 453, Ensenada, Baja California, Mexico TI - Physiological basis for energy demands and early postlarval mortality in the Pacific oyster, Crassostrea gigas AB - Simultaneous physiological (metabolic and excretion rates) and biochemical evaluations (shell/tissue growth, protein, lipid, carbohydrate content, and enzyme activity of the electron transport system) were performed on four batches of hatchery-produced, Pacific oysters (Crassostrea gigas), in order to assess the physiological basis for metamorphic energy demands and postlarval mortality. Evaluations were carried out during normal development (0-25 days post-settlement). Despite differences in the magnitude of physiological and biochemical responses, all oyster batches exhibited a catabolic period associated with metamorphosis, followed by exponential growth. Both protein and lipid content were reduced (by 23-28%), whereas weight-specific metabolic rates (VO2), ammonium excretion rates and activity of the electron transport system (ETS) were highest during metamorphosis. Intense shell growth (13-23% day(-1)) continued during the same period. The cost of metamorphosis varied between 5.4 and 7.7 mJ ind(-1). The effect of metamorphic stress extended throughout the first week post-settlement, as shown by high values of VO2, (112-140 mu mol O-2 h(-1) g(-1) ash-free dry weight (AFDW)), ETS activity (500-1000 mu mol O-2 h(-1) g(-1) AFDW) and cumulative mortality (14-52%). The amount of lipid or total energy present in pre-metamorphic larvae did no exert any significant effect on postlarval survival, rather protein utilization during metamorphosis appeared to be the limiting step for survival. This study provided the first evaluation of the oxygen/nitrogen atomic ratio (O/N) and ETS activity as physiological indices in early oyster stages, and questions the use of single oxyenthalpic equivalents to estimate metabolic demands during short periods of nutritional stress of bivalves. ETS activity readily reflected the metabolic condition of oyster postlarvae, and scaled allometrically with the same mass exponent (b = 0.92) as VO2, therefore suggesting its potential value as an instantaneous index of oyster metabolism. Lowest O/N ratios (<15) coincided with high protein catabolism during metamorphosis, whereas increasing O/N values (up to 43) may have reflected a higher reliance on lipid metabolism with increasing postlarval age. High ratios of VO2/ETS observed during the first week post-settlement (0.15-0.35) may have also reflected an increased efficiency of the oyster's mitochondrial machinery. (C)2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000170358200005 L2 - Crassostrea gigas;energy metabolism;metamorphosis;oyster;postlarvae;ELECTRON-TRANSPORT-SYSTEM; SCALLOP CRASSADOMA-GIGANTEA; UNSATURATED FATTY-ACIDS; MYTILUS-EDULIS; OXYGEN-CONSUMPTION; NITROGEN-EXCRETION; JUVENILE DEVELOPMENT; BIOCHEMICAL-CHANGES; LARVAL DEVELOPMENT; VIRGINICA GMELIN SO - Journal of Experimental Marine Biology and Ecology 2001 ;263(1):77-103 2961 UI - 14320 AU - Garcia-Garcia MD AU - Jimenez-Corona A AU - Jimenez-Corona ME AU - Ferreyra-Reyes L AU - Martinez K AU - Rivera-Chavira B AU - Martinez-Tapia ME AU - Valenzuela-Miramontes E AU - Palacios-Martinez M AU - Juarez-Sandino L AU - Valdespino-Gomez JL AD - Inst Nacl Salud Publ, Secretaria Acad, Cuernavaca 62508, Morelos, MexicoNIOSH, Ctr Dis Control & Prevent, Cincinnati, OH 45226, USAUniv Autonoma Chicuahua, Mexico City, DF, MexicoHosp Gen Reg 1, Unidad Morelos, IMSS, Chihuahua, MexicoHosp Gen Dr Salvador Zubiran Anchondo, Secretaria Salud, Chihuahua, MexicoGarcia-Garcia, MD, Inst Nacl Salud Publ, Secretaria Acad, Ave Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Factors associated with tuberculin reactivity in two general hospitals in Mexico AB - OBJECTIVE: To identify risk factors associated with tuberculin reactivity in healthcare workers (HCWs). DESIGN: Cross-sectional survey of tuberculin reactivity (2 TU of purified protein derivative (PPD) RT23, using the Mantoux two-step test). SETTING: Two general hospitals located in a region with a high prevalence of tuberculosis and high bacille Calmette-Guerin (BCG) coverage. PARTICIPANTS: Volunteer sample of HCWs. RESULTS: 605 HCWs were recruited: 71.2% female; mean age, 36.4 (standard deviation [SD], 8.2) years; 48.9% nurses, 10.4% physicians, 26.8% administrative personnel; mean time of employment, 10.9 (SD, 6.7) years. PPD reactivity (greater than or equal to 10 mm) was found in 390 (64.5%). Multivariate analysis revealed an association of tuberculin reactivity with occupational exposure in the hospital: participation in autopsies (odds ratio [OR], 9.3; 95% confidence interval [CI95], 2.1-40.5; P = .003.), more than 1 year of employment (OR, 2.4; CI95, 1.1-5.0; P = .02), work in the emergency or radiology departments (OR, 2.0; CI95, 1.03-3.81; P = .04), being physicians or nurses (OR, 1.5; CI95, 1.04-2.11; P = .03), age (OR, 1.04; CI95, 1.02-1.07 per year of age; P < .001), and BCG scar (OR, 2.1; CI95, 1.2-3.4; P=.005). CONCLUSIONS: Although the studied population has a high baseline prevalence of tuberculosis infection and high coverage of BCG vaccination, nosocomial risk factors associated with PPD reactivity were identified as professional risks; strict early preventive measures must be implemented accordingly (Infect Control Hosp Epidemiol 2001;22:88-93) MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 10 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 0899-823X UR - ISI:000166934300007 L2 - HEALTH-CARE WORKERS; RESISTANT MYCOBACTERIUM-TUBERCULOSIS; FRAGMENT-LENGTH-POLYMORPHISM; NOSOCOMIAL TRANSMISSION; SKIN-TEST; URBAN; PREVALENCE; COUNTRIES SO - Infection Control and Hospital Epidemiology 2001 ;22(2):88-93 2962 UI - 14119 AU - Garcia-Guerra A AU - Rivera-Dommarco J AU - Neufeld LM AU - Gonzalez-Cossio T AU - Ramakrishnan U AU - Martorell R AD - Natl Inst Publ Hlth, Morelos 62508, MexicoEmory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322, USA TI - Cord blood zinc concentrations form women supplemented with iron or iron and multiple micronutrients during pregnancy MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103680 SO - Faseb Journal 2001 ;15(4):A641-A641 2963 UI - 13956 AU - Garcia-Guzman G AU - Wennstrom A AD - Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, SwedenUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoGarcia-Guzman, G, Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden TI - Interactions between two rust fungi and their host plant Anemone nemorosa AB - In a field study we found that two rust fungi, Tranzchelia anemones and Ochropsora ariae on the shared host. Anemone nemorosa varied in abundance among populations. Tranzchelia anemones was favoured in high light habitats and was particularly common in mixed deciduous forests as well as productive grasslands, whereas the abundance and occurrence of O. ariae was dependent on the presence of the alternate host, Sorbus aucuparia When found in the same population, the two rusts rarely attacked the same ramet. Both T, anemones and O. ariae had a negative effect on plant performance by reducing flower production, and rhizome length. Diseased shoots were also elongated MH - Mexico|Distrito Federal MH - Sweden PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 0906-7590 UR - ISI:000167992100003 L2 - DISPERSAL DISTANCE; RHIZOME GROWTH; PATHOGEN; DENSITY SO - Ecography 2001 ;24(1):25-32 2964 UI - 12837 AU - Garcia-Hernandez J AU - King KA AU - Velasco AL AU - Shumilin E AU - Mora MA AU - Glenn EP AD - Univ Arizona, Environm Res Lab, Tucson, AZ 85706, USAUS Fish & Wildlife Serv, Arizona Ecol Serv Field Off, Phoenix, AZ 85021, USACtr Interdisciplinario Ciencias Marinas, La Paz 23096, BCS, MexicoTexas A&M Univ, US Geol Survey, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAGarcia-Hernandez, J, Univ Arizona, Environm Res Lab, 2601 E Airport Dr, Tucson, AZ 85706 USA TI - Selenium, selected inorganic elements, and organochlorine pesticides in bottom material and biota from the Colorado River delta AB - Concentrations of selenium (Se) in bottom material ranged from 0.6 to 5.0 mug g(-1), and from 0.5 to 18.3 mug g(-1) in biota; 23% of samples exceeded the toxic threshold. Concentrations of DDE in biota exceeded the toxic threshold in 30% of the samples. Greater concentrations of selenium in biota were found at sites with strongly reducing conditions, no output, alternating periods of drying and flooding or dredging activities, and at sites that received,,vater directly from the Colorado River. The smallest Se concentrations in biota were found at sites where an outflow and exposure or physical disturbance of the bottom material were uncommon. (C) 2001 Academic Press MH - USA MH - Mexico|Baja California Sur PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000171097000006 L2 - Colorado River delta;DDE;DDT;dynamics of selenium;metals;redox potential;selenium;wetland management;KESTERSON RESERVOIR; MEXICALI VALLEY; BAJA-CALIFORNIA; AQUATIC BIRDS; WATER; BIOACCUMULATION; WETLANDS; SUCCESS; STATES; USA SO - Journal of Arid Environments 2001 ;49(1):65-89 2965 UI - 11587 AU - Garcia-Hernandez JL AU - Nolasco H AU - Troyo-Dieguez E AU - Jones HG AU - Ortega-Rubio A AD - CIBNOR SC, La Paz 23000, BCS, MexicoUniv Dundee, Dundee DD1 4HN, ScotlandUABCS, La Paz 23000, BCS, MexicoUniv Autonoma Chapingo, URUZA, Bermejillo, Dgo, MexicoGarcia-Hernandez, JL, CIBNOR SC, Agr Zonas Aridas, La Paz 23000, BCS, Mexico TI - The effects of selected insecticides on the superoxide dismutase activity in hot pepper plants (Capsicum annuum L. cv. Ancho San Luis) AB - The effects of four organophosphate insecticides (OPI) on the physiology of hot pepper were evaluated. Three commercial products (Gusation 35PH(R), Paration CE720(R), and Tamaron 600 LM(R)), and a single active ingredient (Methamidophos) were assessed. Four doses were used; the average recommended dose (R), 0.5 R, 1.5 R and 2 times R. The effects were evaluated by measuring the activity of a commonly used stress indicator enzyme from leaf samples. Results showed that insecticides caused alterations on the enzyme system of plants treated with high doses. We found some differences among the insecticide effects, but all of them increased the superoxide dismutase (SOD) activity of hot pepper plants when applied in excess. The specific SOD activity was significantly increased by insecticide applications above the recommended doses MH - Mexico|Baja California Sur MH - Mexico|Durango MH - United Kingdom PB - VICENTE LOPEZ (BA): FUNDACION ROMULO RAGGIO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - Spanish IS - 0031-9457 UR - ISI:000174249900008 L2 - chili;hot pepper;Capsicum annuum;toxicity;superoxide dismutase;insecticides SO - Phyton-International Journal of Experimental Botany 2001 ;():67-74 2966 UI - 11844 AU - Garcia-Lopez PM AU - Muzquiz M AU - Ruiz-Lopez MA AU - Zamora-Natera JF AU - Burbano C AU - Pedrosa MM AU - Cuadrado C AU - Garzon-De la Mora P AD - Univ Guadalajara, Dept Bot & Zool, Zapopan 45100, Jalisco, MexicoINIA, CIT, Area Tecnol Alimentos, Madrid 28080, SpainUniv Guadalajara, CUCS, Div Ciencias Basicas, Inst Enfermedades Cron Degenerativas & Fitofarmac, Guadalajara 44430, Jalisco, MexicoGarcia-Lopez, PM, Inst Pharmazeut Biol, Neuenheimer Feld 364, D-69120 Heidelberg, Germany TI - Chemical composition and fatty acid profile of several Mexican wild lupins AB - We have performed chemical proximate analysis and determined the oil fatty acid profile of seeds from Lupinus mexicanus Cerv, ex Lag., Lupinus exaltatus Zuec., Lupinus montanus H.B.K, and Lupinus stipulatus J. Agardh collected at various locations in four Mexican states. Protein and fiber content from lupin seeds ranged from 334 to 467 and 106 to 172 g/kg on dry weight basis, respectively. The oil content fluctuated from 57 g/kg for L. mexicanus to 115 g/kg for L. montanus. All lupin oils contained a high concentration of palmitic acid (C16:0) and linoleic acid (C18:2), ranging from 175 to 287 and 324 to 517 g/kg, respectively. The ratio of oleic (C18:1) to linoleic (C18:2) acid and total saturated to total unsaturated fatty acids ranged from 0.22 to 0.5 and 1.5 to 3.3, respectively, Erucic acid (C22:1) was not present in any of the lupin oils analyzed while eicosanoic acid (C20:0) was found only in L. mexicanus (Manalisco). Behenic acid (C22:0) was found in all oil samples of L. montanus, L. stipulatus and L. mexicanus oils. Thus, we conclude that the oil content and fatty acid profile of the Mexican lupins studied are similar to those already reported for most lupin oils, except for the absence of erucic acid and greater palmitic acid concentration found in our samples, (C) 2001 Academic Press MH - Germany MH - Mexico|Jalisco MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0889-1575 UR - ISI:000173668600010 L2 - Mexican lupins;fatty acid profile;PROTEIN; ALBUS SO - Journal of Food Composition and Analysis 2001 ;14(6):645-651 2967 UI - 14186 AU - Garcia-Moreno E AU - Salazar G AD - COL MIXCOAC, EMPRESA 109, Mexico City 02920, DF, MexicoUASLP, IICO, San Luis Potosi SLP 78210, MexicoGarcia-Moreno, E, Ohio State Univ, Dept Math, 231 W 18th Ave, Columbus, OH 43210 USA TI - Bounding the crossing number of a graph in terms of the crossing number of a minor with small maximum degree AB - We show that if G has a minor M with maximum degree at most 4, then the crossing number of G in a surface Sigma is at least one fourth the crossing number of M in Sigma. We use this result to show that every graph embedded on the torus with representativity r greater than or equal to 6 has Klein bottle crossing number at least (2r/3](2)/64. (C) 2001 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0364-9024 UR - ISI:000167263000005 L2 - crossing number;graph minors;X C-N SO - Journal of Graph Theory 2001 ;36(3):168-173 2968 UI - 12646 AU - Garcia-Ortega A AU - Huisman EA AU - Sorgeloos P AU - Verreth J AD - Univ Wageningen & Res Ctr, Fish Culture & Fisheries Grp, Wageningen Inst Anim Sci, NL-6700 AH Wageningen, NetherlandsState Univ Ghent, Lab Aquaculture, B-9000 Ghent, BelgiumState Univ Ghent, Artemia Reference Ctr, B-9000 Ghent, BelgiumGarcia-Ortega, A, Ctr Invest Alimentac & Desarrollo, Unidad Mazatlan, Apartado Postal 711, Mazatlan, Sinaloa, Mexico TI - Evaluation of protein quality in microbound starter diets made with decapsulated cysts of Artemia and fishmeal for fish larvae AB - The protein quality of carboxymethylcellulose microbound diets (MBDs) made with decapsulated cysts of Artemia and/or fishmeal as protein sources was used as an indicator of their suitability as starter feed for fish larvae. Studies on the proximate, fatty acid and amino acid composition, in vitro protein digestibility, diet solubility, and protein structure were combined with an in vivo feeding experiment with African catfish Clarias gariepinus larvae to evaluate the protein quality of the MBDs and a commercial diet. The growth of catfish larvae was higher when fed Artemia-based MBDs than with fishmeal-based MBDs. despite the higher protein and amino acid content of the latter. The in vitro protein digestibility was high for all the MBDs in comparison to a commercial diet. Differences were found in the protein molecular weight among the diets. Most of the proteins in the fishmeal-based diets had low molecular weight in the range between 7.4 and 49.2 kDa. The Artemia-based MBDs had larger protein fractions between 29.4 and 82 kDa. Decapsulated cysts improved the utilization of the MBDs when used in combination with fishmeal. Besides the effect of chemical attractants, the explanation for the positive effect of Artemia has yet to be elucidated. However, attention should be given to interactions between nutrients (e.g., protein-lipid) in live food, which might have an effect on the functional properties of food proteins MH - Belgium MH - Mexico|Sinaloa MH - Netherlands PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 6 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000171531800007 L2 - CLARIAS-GARIEPINUS BURCHELL; BASS DICENTRARCHUS-LABRAX; FREE AMINO-ACIDS; DIGESTIBILITY; REQUIREMENTS; NAUPLII; FOOD SO - Journal of the World Aquaculture Society 2001 ;32(3):317-329 2969 UI - 11803 AU - Garcia-Pena C AU - Thorogood M AU - Armstrong B AU - Reyes-Frausto S AU - Munoz O AD - London Sch Hyg & Trop Med, Hlth Promot Res Unit, London WC1 7HT, EnglandMexican Inst Social Secur, Epidemiol & Hlth Serv Res Dept, Mexico City, DF, MexicoLondon Sch & Hyg & Trop Med, Environm Epidemiol Unit, London, EnglandMexican Inst Social Secur, Med Res Unit Ageing, Mexico City, DF, MexicoThorogood, M, London Sch Hyg & Trop Med, Hlth Promot Res Unit, Keppel St, London WC1 7HT, England TI - Pragmatic randomized trial of home visits by a nurse to elderly people with hypertension in Mexico AB - Background In Mexico, hypertension is a major cause of. disability and death in the. elderly, but the most effective way to promote behaviour change in old people is unknown. Low resource interventions that are effective in normal healthcare settings are urgently needed. We report the results of a randomized trial of nurse-provided health and lifestyle advice during home visits to elderly people with hypertension in Mexico City. Methods Subjects were 718 people with hypertension aged greater than or equal to60 years, who were residents of Mexico City and were registered with the Family Medicine Clinics of the Mexican Institute of Social Security (IMSS). A randomized controlled trial was carried out in which the intervention group was offered nurse visits over 6 months with blood pressure checks and negotiated lifestyle changes. The control group continued to receive usual care. Results After 6 months 36.5%. of the intervention versus 6.8%. of the control group had a blood pressure of <160/90 mmHg. The difference in the mean change in systolic blood pressure was 3.31 mmHg (P = 0.03, 95% CI: 6.32, 0.29) and the same difference in diastolic blood pressure was 3.67 mmHg (P = 0.00, 95% CI: 5.22, 2.12). Weight and sodium excretion fell more in the intervention group, but the difference was not significant. Conclusions Nurse home visits are effective in reducing blood pressure in hypertensive patients aged greater than or equal to60 years MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0300-5771 UR - ISI:000173787100056 L2 - hypertension;elderly;Mexico;BLOOD-PRESSURE; EXERCISE SO - International Journal of Epidemiology 2001 ;30(6):1485-1491 2970 UI - 14025 AU - Garcia-Pichel F AU - Lopez-Cortes A AU - Nubel U AD - Arizona State Univ, Dept Microbiol, Tempe, AZ 85287, USACIBNOR, Ctr Biol Res NW, La Paz 23090, Baja Calif Sur, MexicoMax Planck Inst Marine Microbiol, D-28359 Bremen, GermanyDeutsch Sammlung Mikroorganismen & Zellkulturen, D-38126 Braunschweig, GermanyGarcia-Pichel, F, Arizona State Univ, Dept Microbiol, Tempe, AZ 85287 USA TI - Phylogenetic and morphological diversity of cyanobacteria in soil desert crusts from the Colorado Plateau AB - We compared the community structures of cyanobacteria in four biological desert crusts from Utah's Colorado Plateau developing on different substrata, We analyzed natural samples, cultures, and cyanobacterial filaments or colonies retrieved by micromanipulation from field samples using microscopy, denaturing gradient gel electrophoresis, and sequencing of 16S rRNA genes. While microscopic analyses apparently underestimated the biodiversity of thin filamentous cyanobacteria, molecular analyses failed to retrieve signals for otherwise conspicuous heterocystous cyanobacteria with thick sheaths. The diversity found in desert crusts was underrepresented in currently available nucleotide sequence databases, and several novel phylogenetic clusters could be identified. Morphotypes fitting the description of Microcoleus vaginatus Gomont, dominant in most samples, corresponded to a tight phylogenetic cluster of probable cosmopolitan distribution, which was well differentiated from other cyanobacteria traditionally classified within the same genus. A new, diverse phylogenetic cluster, named "Xeronema," grouped a series of thin filamentous Phormidium-like cyanobacteria. These were also ubiquitous in our samples and probably correspond to various botanical Phormidium and Schizothrix spp., but they are phylogenetically distant from thin filamentous cyanobacteria from other environments, Significant differences in community structure were found among sail types, indicating that soil characteristics may select for specific cyanobacteria, Gypsum crusts were most deviant from the rest, while sandy, silt, and shale crusts were relatively more similar among themselves MH - Germany MH - Mexico|Baja California Sur MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 67 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000167865500067 L2 - RIBOSOMAL-RNA SEQUENCES; BENTHIC CYANOBACTERIA; CULTURES; DIATOMS; GENES; LAND SO - Applied and Environmental Microbiology 2001 ;67(4):1902-1910 2971 UI - 13228 AU - Garcia-Robles I AU - Sanchez J AU - Gruppe A AU - Martinez-Ramirez AC AU - Rausell C AU - Real MD AU - Bravo A AD - Univ Valencia, Dept Genet, Valencia 46100, SpainUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoTech Univ Munich, Inst Appl Zool, D-85354 Freising, GermanyReal, MD, Univ Valencia, Dept Genet, Dr Moliner 50, Valencia 46100, Spain TI - Mode of action of Bacillus thuringiensis PS86Q3 strain in hymenopteran forest pests AB - The mode of action of Cry toxins has been described principally in lepidopteran insects as a multistep process. In this work we describe the mode of action of a Cry toxin active in the common pine sawfly Diprion pini (Hymenoptera, Diprionidae). considered a major forest pest in Europe. Strain PS86Q3 contains a long bipyramidal crystal composed of five major proteins. The N-terminal sequence shows that the 155 kDa protein corresponds to Cry5B toxin and the other proteins belong to the Cry5A subgroup. PCR analysis indicates the presence of cry5Ac and cry5Ba genes, suggesting that Cry5A protein should be Cry5Ac. Activation of protoxins with trypsin or with midgut content from D. pini and Cephacia abietis (Hymenoptera, Pamphiliidae) (spruce webspinning sawfly), another important hymenopteran forest pest, produced a single 75 kDa toxin that corresponded to Cry5A by N-terminal sequence and is responsible for the insecticidal activity. Homologous competition experiments with D. pini and C. abietis brush border membrane vesicles (BBMV) showed that the binding interaction of Cry5A is specific. Membrane potential measurements using a fluorescent dye indicate that Cry5A toxin at nM concentration caused immediate permeability changes in the BBMV isolated from both hymenopteran larvae. The initial response and the sustained permeability change are cationic as previously shown for Cry1 toxins. These results indicate that the hymenopteran specific Cry5A toxin exerts toxicity by a similar mechanism as Cry1 toxins. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0965-1748 UR - ISI:000170013900002 L2 - Bacillus thuringiensis mode of action;Cry5;Diprion pini;Cephacia abietis;BRUSH-BORDER MEMBRANE; PLANAR LIPID BILAYERS; PESTICIDAL CRYSTAL PROTEINS; BUTTERFLY PIERIS-BRASSICAE; DELTA-ENDOTOXIN; INSECTICIDAL TOXIN; SELECTIVE CHANNELS; PORE FORMATION; MIDGUT; BINDING SO - Insect Biochemistry and Molecular Biology 2001 ;31(9):849-856 2972 UI - 12250 AU - Garcia-Serrano J AU - Koshizaki N AU - Sasaki T AU - Martinez-Montes G AU - Pal U AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Autonoma Estado Hidalgo, CIMyM, Pachuca 42074, Hidalgo, MexicoNatl Inst Adv Ind Sci & Technol, Nanoarchitecton Res Ctr, Tsukuba, Ibaraki 3058565, JapanPal, U, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Determination of optical constants of Si/ZnO polycrystalline nanocomposites by spectroscopic ellipsometry AB - The optical constants of Si/ZnO composite Films grown on quartz glass substrates were determined in the spectral range 1.5-5.0 eV by spectroscopic ellipsometry using a rotating-analyzer ellipsometer. The structure of the sample,,, was modeled by a two-phase (substrate-film) model, and the optical functions of the film were parameterized through different effective medium approximations. The results allowed us to estimate the microstructural film parameters, such as film thickness, the volume fractions of each of the constituents, and optical constants MH - Japan MH - Mexico|Hidalgo MH - Mexico|Puebla PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000172585100031 L2 - PHOTOEMISSION; ALLOYS; SIOX; SINX SO - Journal of Materials Research 2001 ;16(12):3554-3559 2973 UI - 12968 AU - Garcia-Sierra F AU - Wischik CM AU - Harrington CR AU - Luna-Munoz J AU - Mena R AD - IPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07000, DF, MexicoUniv Aberdeen, Dept Mental Hlth, Aberdeen, ScotlandMena, R, IPN, CINVESTAV, Dept Physiol Biophys & Neurosci, POB 14-740, Mexico City 07000, DF, Mexico TI - Accumulation of C-terminally truncated tau protein associated with vulnerability of the perforant pathway in early stages of neurofibrillary pathology in Alzheimer's disease AB - Neurofibrillary pathology is a characteristic hallmark of Alzheimer's disease that is closely correlated with cognitive decline. We have analysed the density and distribution of neurofibrillary tangles (NFTs) that are immunoreactive with the monoclonal antibody (mAb) 423 in a prospectively analysed population of Alzheimer's disease (AD) cases and age-matched controls. NFTs were examined in allocortical and isocortical areas and correlated with Braak pathological stage and clinical severity of dementia. The mAb 423 was used as it recognises a C-terminally truncated tau fragment that is a major constituent of NFTs. Our results show that extracellular NFTs and, to a lesser extent, intracellular NFTs, correlated significantly with both Braak stages and the clinical index of severity. Furthermore, a differential distribution of the two types of tangles indicates that layer II of the entorhinal cortex and the transentorhinal area are particularly vulnerable to neurofibrillary degeneration. These areas serve as a point of connection between isocortex and hippocampus. Our findings, therefore, suggest that the perforant pathway may be substantially affected by the accumulation of truncated tau protein in AD and that this represents a neuropathological predictor for the clinical severity of dementia. When neurofibrillary pathology was examined by combined labelling with mAbs 423 and Alz-50 and the dye thiazin red, we were able to demonstrate various stages of tau aggregation. The different stages may represent a sequence of conformational changes that tau proteins undergo during tangle formation in the allocortex during the early development of dementia in AD. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0891-0618 UR - ISI:000170746600006 L2 - Alzheimer's disease;confocal microscopy;entorhinal cortex mAb 423;neurofibrillary tangles;thiazin red;PAIRED HELICAL FILAMENTS; REACTION END-PRODUCTS; ENTORHINAL CORTEX; PARAHIPPOCAMPAL GYRUS; MONOCLONAL-ANTIBODY; NEURONAL LOSS; PHF CORE; BRAIN; DEMENTIA; TANGLES SO - Journal of Chemical Neuroanatomy 2001 ;22(1-2):65-77 2974 UI - 13780 AU - Garcia-Tovar CG AU - Perez A AU - Luna J AU - Mena R AU - Osorio B AU - Aleman V AU - Mondragon R AU - Mornet D AU - Rendon A AU - Hernandez JM AD - IPN, Ctr Invest & Estudios Avanzados, Dept Cellular Biol, Mexico City 07360, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Biophys Physiol & Neurosci, Mexico City, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Biochem, Mexico City, DF, MexicoUNAM, FES Cuautitlan, Morphol Unit, Mexico City, DF, MexicoINSERM, U 128, Montpellier, FranceUniv Strasbourg 1, INSERM, EMI 99 18, Strasbourg, FranceHernandez, JM, IPN, Ctr Invest & Estudios Avanzados, Dept Cellular Biol, Av IPN 2508 Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Biochemical and histochemical analysis of 71 kDa dystrophin isoform (Dp71f) in rat brain AB - Dp71 is a member of the dystrophin family and the most abundant dmd gene product in the brain. In the present study, we focused on a short dystrophin transcript named Dp71f, which is alternatively spliced when exon 78 is absent The topographic localization of this protein in the encephalon has not been properly described yet, nor its cellular or subcellular localization, and even less its functions. Dp71f was found to be a cytoplasmic 70 kDa protein and localized in all encephalon regions studied. Double labeling using specific markers for various cell types confirmed Dp71f distribution in the cytoplasm of all cell types studied. Labeling was more conspicuous near the nucleus and diminished towards the periphery of cells. In some cases, we observed cells that were positive for actin and Dp71f in regions corresponding to lamellipodia-like structures. Dp71f and Dp71d isoforms were differently distributed. Our study is the first specific and unambiguous description of the topography and cellular localization patterns of Dp71f in brain, suggesting that Dp71f is a ubiquitous protein MH - France MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Cell Biology U5 - J;Article AV - English IS - 0065-1281 UR - ISI:000168491100009 L2 - Duchenne muscular dystrophy;dystrophin isoforms;rat brain;Dp71;cytoskeleton;DUCHENNE MUSCULAR-DYSTROPHY; GLYCOPROTEIN-BINDING-SITE; DIFFERENTIAL EXPRESSION; SUBCELLULAR-LOCALIZATION; NONMUSCLE TISSUES; PERIPHERAL-NERVE; CARBOXY-TERMINUS; MAJOR PRODUCT; SHORT FORMS; GENE SO - Acta Histochemica 2001 ;103(2):209-224 2975 UI - 12553 AU - Garcia-Valdes J AU - Zamudio FZ AU - Toro L AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoUniv Calif Los Angeles, Dept Anesthesiol, Los Angeles, CA 90095, USAUniv Calif Los Angeles, Brain Res Inst, Dept Mol & Med Pharmacol, Los Angeles, CA 90095, USAPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Ave Univ 2001,POB 510-3, Cuernavaca 62210, Morelos, Mexico TI - Slotoxin, alpha KTx1.11, a new scorpion peptide blocker of MaxiK channels that differentiates between alpha and alpha+beta (beta 1 or beta 4) complexes (vol 505, pg 369, 2001) MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Correction AV - English IS - 0014-5793 UR - ISI:000171830200024 SO - Febs Letters 2001 ;507(1):122-122 2976 UI - 12791 AU - Garcia-Valdes J AU - Zamudio FZ AU - Toro L AU - Possan LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoUniv Calif Los Angeles, Brain Res Inst, Dept Anesthesiol, Los Angeles, CA 90095, USAUniv Calif Los Angeles, Brain Res Inst, Dept Mol & Med Pharmacol, Los Angeles, CA 90095, USAPossan, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Ave Univ 2001,POB 510-3, Cuernavaca 62210, Morelos, Mexico TI - Slotoxin, alpha KTx1.11, a new scorpion peptide blocker of MaxiK channels that differentiates between alpha and alpha+beta (beta 1 or beta 4) complexes AB - A novel peptide from Centruroides noxius Hoffmann scorpion venom was isolated and sequenced. The 37 amino acid peptide belongs to the charybdotoxin sub-family (alpha KTx1) and was numbered member 11. Alpha KTx1.11 has 75% sequence identity with iberiotoxin and 54% with charybdotoxin. Alpha KTx1.11 revealed specificity for mammalian MaxiK channels (hSlo), thus, was named slotoxin. Slotoxin blocks the MaxiK pore-forming alpha subunit reversibly (K-d = 1.5 nM). Slotoxin association with alpha+beta (beta1 or beta4) channels was similar to 10 times slower than iberiotoxin and charybdotoxin, leading to a lack of effect on alpha+beta4 when tested at 100 nM for 5 min. Thus, slotoxin is a better tool to distinguish MaxiK alpha+beta complexes. (C) 2001 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000171272500006 L2 - BK channel;scorpion toxin;pharmacology;potassium channel;Centruroides noxius;ACTIVATED POTASSIUM CHANNELS; CA2+-ACTIVATED K+ CHANNEL; LARGE-CONDUCTANCE; PANDINUS IMPERATOR; HSLO CHANNEL; N-TERMINUS; SUBUNIT; VOLTAGE; IBERIOTOXIN; CLONING SO - Febs Letters 2001 ;505(3):369-373 2977 UI - 14303 AU - Garcia A AU - Huerta R AU - Sanchez-Colon G AD - Inst Politecn Nacl, Dept Fis, Ctr Invest & Estud Avanzados, Mexico City 07000, DF, MexicoIPN, Dept Fis Aplicada, Ctr Invest & Estud Avanzados, Merida 97310, Yucatan, VenezuelaGarcia, A, Inst Politecn Nacl, Dept Fis, Ctr Invest & Estud Avanzados, AP 14-740, Mexico City 07000, DF, Mexico TI - An estimate of a lower bound on the masses of mirror baryons AB - We consider the most favorable conditions to indirectly observe the mixing of ordinary and mirror hadrons in non-leptonic and weak radiative decays of hyperons. This allows us to set a lower bound on the masses of mirror baryons. This bound turns out to be impressively high, of the order of 10(6) GeV. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000166860500017 L2 - PRIORI MIXED HADRONS; NONLEPTONIC DECAYS; HYPERONS SO - Physics Letters B 2001 ;498(3-4):251-255 2978 UI - 13621 AU - Garcia ET AU - Barranco AP AU - Vazquez C AU - Pinar FC AU - Martinez OP AD - Univ La Habana, Inst Mat & React, Fac Quim, La Habana 10400, CubaUniv La Habana, Inst Mat & React, Fac Fis, La Habana 10400, CubaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCICATA Altamira, Altamira, Tamps, MexicoGarcia, ET, Univ La Habana, Inst Mat & React, Fac Quim, Zapata & G,Vedado, La Habana 10400, Cuba TI - Oxidation kinetic study of copper(I) in ferroelectric ceramic [PbTiO3-PbZrO3-PbCuNbO3+0.5 mol%MnO2] system by high resolution thermogravimetric analysis AB - The Cu+ oxidation reaction study in the PbZr0.50Ti0.44(Cu1/4Nb3/4)(0.06)O-3 + 0.5 mol%MnO2 ferroelectric ceramic was carried out using high-resolution themogravimetry (Hi-Res TGA) and the kinetic analysis was made by using the traditional criterion of the mathematical fitting of f(alpha) functions and the isoconversion method. A D2 diffusion mechanism with a variable activation energy value in the range 75-103 kJ/mol was obtained and the results were interpreted in two ways: an intercrystallite oxygen diffusion and a copper(I) oxidation process. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000168764900006 L2 - kinetic oxidation;high-resolution TGA;ferroelectric system;isoconversion method;thermal analysis;RATE THERMAL-ANALYSIS; SOLIDS SO - Thermochimica Acta 2001 ;372(1-2):39-44 2979 UI - 12722 AU - Garcia JA AU - Pons JM AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Catalonia, SpainInst Fis Altes Energies, E-08028 Barcelona, Catalonia, SpainGarcia, JA, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Lagrangian noether symmetries as canonical transformations AB - We prove that, given a time-independent Lagrangian defined in the first tangent bundle of configuration space, every infinitesimal Noether symmetry that is defined in the n-tangent bundle and is not vanishing on-shell, can be written as a canonical symmetry in an enlarged phase space, up to constraints that vanish on-shell. The proof is performed by the implementation of a change of variables from the n-tangent bundle of the Lagrangian theory to an extension of the Hamiltonian formalism which is particularly suited for the case when the Lagrangian is singular. This result proves the assertion that any Noether symmetry can be canonically realized in an enlarged phase spare. Then we work out the regular case as a particular application of this ideas and rederive the Noether identities in this framework. Finally we present an example to illustrate our results MH - Mexico|Distrito Federal MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000171385900007 L2 - CONSTRAINED SYSTEMS; CONFORMAL SYMMETRY; 2-TIME PHYSICS; 2 TIMES; DUALITY; BRANES SO - International Journal of Modern Physics A 2001 ;16(23):3897-3914 2980 UI - 14327 AU - Garcia JD AU - Toro L AU - Possani LD AD - UNAM, Cuernavaca 62210, Morelos, MexicoUniv Calif Los Angeles, Los Angeles, CA 90095, USA TI - Isolation and characterization of a toxic peptide that blocks MaxiK channels MH - Mexico|Morelos MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000166692201016 SO - Biophysical Journal 2001 ;80(1):221A-221A 2981 UI - 12963 AU - Garcia KL AU - Garcia-Beneytez JM AU - Valenzuela R AU - Zhukov A AU - Gonzalez J AU - Vazquez M AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Complutense Madrid, Inst Magnetismo Aplicado, CSIC, Madrid, SpainUniv Pais Vasco, E-20080 San Sebastian, SpainValenzuela, R, Natl Autonomous Univ Mexico, Inst Invest Mat, POB 70-360, Mexico City 04510, DF, Mexico TI - Effects of torsion on the magnetoimpedance response of CoFeBSi amorphous wires AB - CoFeBSi amorphous wires prepared by the in-rotating-water quenching technique were submitted to torsion annealings by Joule heating. Their impedance response, Z. was measured in the giant magnetoimpedance arrangement in the 5 Hz-13 MHz frequency range and 0.2-22 mA AC current amplitude. By comparison with as-cast wires of the same composition. a decrease in Z and an increase in the field irreversibility (at I MHz and 2 mA) were observed when submitted to axial DC magnetic fields of + 40 Oe. The analysis of the real and imaginary components of inductance at f < 500 kHz allowed the resolution of domain wall bulging from domain wall displacement, As compared with as-cast wires., torsion annealing produced a decrease in both processes. These results are consistently interpreted in terms of an induced magnetic anisotropy. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000170708600263 L2 - magnetoimpedance;induced anisotropy;annealing effects;domain wall dynamics;IMPEDANCE SPECTRA SO - Journal of Magnetism and Magnetic Materials 2001 ;226():721-723 2982 UI - 13557 AU - Garcia LV AU - Przybyla AA AU - Torres ED AU - Navarro HT AU - Rodriguez G AD - Univ Auronoma Estado Mexico, Ttoluca, MexicoRes Inst Pomol & Floriculture, PL-96100 Skierniewice, PolandInst Nacl Invest Nucl, Dept Biol, Hipodromo Condesa 06100, DF, MexicoUniv Autonoma Chapingo, Dept Fitotecnia, Chapingo 56230, MexicoGarcia, LV, Univ Auronoma Estado Mexico, AP 435,CP 50000, Ttoluca, Mexico TI - Morphological description of nine botanical varieties of Tigridia pavonia (LF) ker. gawl AB - Tigridia pavonia is native to America and may be found in locations from Mexico southwards to the Andes. It is considered that Mexico has the widest diversity of species of the genus Tigridia, and within Tigridia pavonia nine different botanical varieties have been collected. The description of those varieties is the aim of this paper. Three collections of T: pavonia were performed at three different sites within Mexico State: 1) Temascaltepec 2250 m a.s.l., 2) Tenancingo 2100 m a.s.l.. 3) Temoaya 2600 m a.s.l. and six, one and two botanical varieties have been collected respectively. Plants were grown in greenhouse at the Agricultural Science Faculty at Universidad Autonoma del Estado de Mexico, 2600 m a.s.l., and were characterized according to seventeen pertinent descriptors. Quantitative descriptors were subjected to a variance analysis under a completely randomised design, and a multiple rank test of Tukey was applied. The descriptors that are proposed to distinguish among botanical varieties are: length of shoot, number of branches per floral shoot, number of fruits, principal colour of the flower, background colour, shape of external tepal, dominant colour of staminal column, and distance from the base of anther to stigma MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - Poland PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0949-5460 UR - ISI:000169043200003 SO - Journal of Applied Botany-Angewandte Botanik 2001 ;75(1-2):14-19 2983 UI - 12803 AU - Garcia PJV AU - Ferreira J AU - Cabrit S AU - Binette L AD - Univ Porto, Ctr Astrofis, P-4150762 Oporto, PortugalObserv Lyon, CRAL, CNRS, UMR 5574, F-69561 St Genis Laval, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble, FranceObserv Paris, DEMIRM, CNRS, UMR 8540, F-75014 Paris, FranceUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoGarcia, PJV, Univ Porto, Ctr Astrofis, Rua Estrelas, P-4150762 Oporto, Portugal TI - Atomic T Tauri disk winds heated by ambipolar diffusion - I. Thermal structure AB - Motivated by recent subarcsecond resolution observations of jets from T Tauri stars, we extend the work of Safier (1993a,b) by computing the thermal and ionization structure of self-similar, magnetically-driven, atomic disk winds heated by ambipolar diffusion. Improvements over his work include: (1) new magnetized cold jet solutions consistent with the underlying accretion disk (Ferreira 1997); (2) a more accurate treatment of ionization and ion-neutral momentum exchange rates; and (3) predictions for spatially resolved forbidden line emission (maps, long-slit spectra, and line ratios), presented in a companion paper, Garcia et al. (2001). As in Safier (1993a), we obtain jets with a temperature plateau around 10(4) K, but ionization fractions are revised downward by a factor of 10-100. This is due to previous omission of thermal speeds in ion-neutral momentum-exchange rates and to different jet solutions. The physical origin of the hot temperature plateau is outlined. In particular we present three analytical criteria for the presence of a hot plateau, applicable to any given MHD wind solution where ambipolar diffusion and adiabatic expansion are the dominant heating and cooling terms. We finally show that, for solutions favored by observations, the jet thermal structure remains consistent with the usual approximations used for MHD jet calculations (thermalized, perfectly conducting, single hydromagnetic cold fluid calculations) MH - France MH - Mexico|Distrito Federal MH - Portugal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171226500025 L2 - ISM : jets and outflows;stars : pre-main sequence;MHD;line : profiles;accretion disks;ACCRETION-EJECTION STRUCTURES; HUBBLE-SPACE-TELESCOPE; YOUNG STELLAR OBJECTS; FORBIDDEN-LINE EMISSION; MAGNETOCENTRIFUGALLY DRIVEN FLOWS; HERBIG-HARO OBJECTS; MASS-LOSS; PROTOSTELLAR DISKS; DG TAURI; STARS SO - Astronomy & Astrophysics 2001 ;377(2):589-608 2984 UI - 12804 AU - Garcia PJV AU - Cabrit S AU - Ferreira J AU - Binette L AD - Univ Porto, Ctr Astrofis, P-4150762 Oporto, PortugalObserv Lyon, CRAL, CNRS, UMR 5574, F-69561 St Genis Laval, FranceObserv Paris, DEMIRM, CNRS, UMR 8540, F-75014 Paris, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble, FranceUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoGarcia, PJV, Univ Porto, Ctr Astrofis, Rua Estrelas, P-4150762 Oporto, Portugal TI - Atomic T Tauri disk winds heated by ambipolar diffusion - II. Observational tests AB - Thermal and ionization structures of self-similar, magnetically-driven disk winds obtained in a companion paper (Garcia et al. 2001) are used to compute a series of jet synthetic observations. These include spatially resolved forbidden line emission maps, long-slit spectra, as well as line ratios. Line profiles and jet widths appear to be good tracers of the wind dynamics and collimation, whereas line ratios essentially trace gas excitation conditions. All the above diagnostics are confronted to observations of T Tauri star microjets. Convolution by the observing beam is shown to be essential for a meaningful test of the models. We find that jet widths and qualitative variations in line profiles with both distance and line tracers are well reproduced. A low-velocity [O I] component is also obtained, originating from the disk wind base. However, this component is too weak, predicted maximum velocities are too high and electronic and total densities are too low. Denser and slower magnetized winds, launched from disks with warm chromospheres, might resolve these discrepancies MH - France MH - Mexico|Distrito Federal MH - Portugal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 26 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171226500026 L2 - ISM : jets and outflows;stars : pre-main sequence;MHD;line : profiles;accretion disks;SPACE-TELESCOPE OBSERVATIONS; CENTRIFUGALLY DRIVEN WINDS; FORBIDDEN-LINE EMISSION; YOUNG STARS; MASS-LOSS; DG TAURI; PROTOSTELLAR DISKS; JETS; ACCRETION; SPECTROSCOPY SO - Astronomy & Astrophysics 2001 ;377(2):609-616 2985 UI - 13992 AU - Garcia R AU - Hirata GA AU - McKittrick J AD - UNAM, CCMC, CICESE, Programa Posgrad Fis Mat, Ensenada 22860, Baja California, MexicoUniv Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093, USAGarcia, R, UNAM, CCMC, CICESE, Programa Posgrad Fis Mat, Km 103 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - New combustion synthesis technique for the production of (InxGa1-x)(2)O-3 powders: Hydrazine/metal nitrate method AB - A new low-temperature method to produce (InxGa1-x)(2)O-3 (x = 0.1, 0.2. and 0.3) powders with high purity, high chemical homogeneity and improved crystallinity in the as-synthesized state has been developed. This procedure produced finely divided powders through an exothermic reaction between the precursors. The process starts with aqueous solutions of In(NO3)(3) and Ga(NO3)(3) as the precursors and hydrazine as the (noncarbonaceous) fuel. The combustion reaction occurred when heating the precursors between 150 and 200 degreesC in a closed vessel filled with an inert gas (Ar), which yields (InxGa1-x)(2)O-3 directly. These materials were compared with powders prepared by a more typical combustion synthesis reaction between nitrates and a carbonaceous fuel at a higher ignition temperature of 500 degreesC MH - Mexico|Baja California MH - USA PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 16 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000167930200021 L2 - ZIRCONIA; YTTRIA SO - Journal of Materials Research 2001 ;16(4):1059-1065 2986 UI - 13659 AU - Garcia S AU - Font R AU - Portelles J AU - Quinones RJ AU - Heiras J AU - Siqueiros JM AD - Univ La Habana, Fac Fis, La Habana 10400, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoGarcia, S, Univ La Habana, Fac Fis, La Habana 10400, Cuba TI - Effect of Nb doping on (Sr,Ba)TiO3 (BST) ceramic samples AB - The effect of doping the Sr0.3Ba0.7Ti(1-5y/4)NbyO3 ceramic with different concentration of Nb is studied by scanning electron microscopy (SEM), X-ray diffraction and thermoelectric analysis. It is observed that the grain size decreases as the Nb concentration increases. The critical temperature T-c has a linear decrease at a rate of 19 degreesC/mol% of Nb. The temperature dependence of the dielectric permittivity presents strongly broadened curves, which suggest a non Curie-Weiss behavior near the transition temperature. The diffuse phase transition coefficient (delta) was also determined and its value leads to the conclusion that the degree of disorder in the system increases with the presence of the Nb cation MH - Cuba MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1385-3449 UR - ISI:000168729900002 L2 - cation substitution;dielectric permittivity;SBT ceramics;diffuse phase transition;DIFFUSED-PHASE-TRANSITION; DOPED BATIO3; TITANATE SO - Journal of Electroceramics 2001 ;6(2):101-108 2987 UI - 13312 AU - Garcia T AU - de Posada E AU - Ponce L AU - Sanchez JL AU - Diaz S AU - Pedrero E AU - Fernandez F AU - Bartolo-Perez P AU - Pena JL AU - Diamant R AU - Pereira JAM AD - IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yuc, MexicoUniv Havana, IMRE, Fac Phys, Havana, CubaIPN, CICATA, Altamira, Tamps, MexicoPontificia Univ Catolica Rio de Janeiro, Rio De Janeiro, BrazilBartolo-Perez, P, IPN, CINVESTAV, Dept Appl Phys, AP 73 Cordemex, Merida 97310, Yuc, Mexico TI - Textured strontium ferrite thin films grown by PLD AB - Textured strontium ferrite thin films has been grown at room temperature using a Nd:YAG laser. The spectroscopic study of the produced plasma revealed that the expansion velocities of the species are of the order of 10(6) cm/s, which could explain the obtained texture. The stoichiometric analysis shows a small oxygen reduction in the films due to the absence of a gas background during the growing process. The influence of the target quality on the droplet presence at the thin films has been investigated. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Cuba MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000169830200009 L2 - strontium ferrite;ferromagnetic oxide (MFe12O19);textured thin films;laser ablation;XPS;AES;MAGNETIC-PROPERTIES; SUBSTRATE-TEMPERATURE; EMISSION-SPECTRA; LASER ABLATION; YBA2CU3O7-X; ANISOTROPY; DEPOSITION; BAFE12O19; BARIUM SO - Materials Letters 2001 ;49(5):294-298 2988 UI - 12432 AU - Garcilazo H AU - Valcarce A AU - Fernandez F AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainUniv Valencia, Dept Fis Teor, E-46100 Valencia, SpainGarcilazo, H, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - Effect of higher orbital angular momenta in the baryon spectrum AB - We have performed a Faddeev calculation of the baryon spectrum for the chiral constituent quark model including higher orbital angular momentum states. We have found that the effect of these states is important, although a description of the baryon spectrum of the same quality as that of the one given by including only the lowest-order configurations can be obtained. We have studied the effect of the pseudoscalar quark-quark interaction on the relative position of the positive- and negative-parity excitations of the nucleon as well as the effect of varying the strength of the color-magnetic interaction MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000172077000075 L2 - QUARK CLUSTER MODEL SO - Physical Review C 2001 ;6405(5): 2989 UI - 14082 AU - Garcilazo H AU - Valcarce A AU - Fernandez F AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainGarcilazo, H, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - Baryon spectrum in the chiral constituent quark model AB - The low-lying baryon spectrum predicted by a chiral constituent quark model is examined within an exact Faddeev approach. The reliability of the solutions provided by a truncated hyperspherical harmonic calculation is discussed. We demonstrate that the obtained spectrum is quite reasonable and compatible with the description of the NN phenomenology in the presence of a standard one-gluon exchange force MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000167475000067 L2 - CLUSTER MODEL; BOUND-STATES; GAUGE-THEORY; SYSTEMS SO - Physical Review C 2001 ;6303(3): 2990 UI - 14348 AU - Garcilazo H AU - Pena MT AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoCtr Fis Interactcoes Fundamentais, P-1049001 Lisbon, PortugalInst Super Tecn, Dept Fis, P-1049001 Lisbon, PortugalGarcilazo, H, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - Nonexistence of a eta NN quasibound state AB - We have solved the Faddeev equations for etad elastic scattering using realistic separable interactions for the NN and coupled etaN-piN subsystems. We found that including explicitly the pion channel in the integral equations drastically reduces the attraction that is present in the system. As a consequence, the existence of a eta NN quasibound state is excluded by the modern etaN amplitude analysis MH - Mexico|Distrito Federal MH - Portugal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000166867800001 L2 - DEUTERON SCATTERING; LENGTH; SYSTEM SO - Physical Review C 2001 ;6302(2): 2991 UI - 12103 AU - Gardner SC AU - Grue CE AU - Major WW AU - Conquest LL AD - Univ Washington, Washington Cooperat Fish & Wildlife Res Unit, Sch Aquat & Fishery Sci, Seattle, WA 98195, USAUniv Washington, Sch Aquat & Fishery Sci, Ctr Quantitat Sci, Seattle, WA 98195, USAGardner, SC, Ctr Invest Biol Noroeste, SC AP 128, La Paz 23090, Baja California, Mexico TI - Aquatic invertebrate communities associated with purple loosestrife (Lythrum salicaria), cattail (Typha latifolia), and bulrush (Scirpus acutus) in central Washington, USA AB - Purple loosestrife (Lythrum salicaria) is an invasive wetland perennial that is thought to threaten the ecological integrity of North American wetlands by forming monotypic stands and altering the diversity of native wetland ecosystems. To determine if purple loosestrife infestation alters aquatic invertebrate communities, the abundance and size distribution of aquatic invertebrates associated with purple loosestrife were quantified during the spring and summer and compared to those within stands of two other commonly occurring emergents, cattail (Typha latifolia) and bulrush (Scirpus acutus). Aquatic invertebrates representing 10 taxa (classes or orders) were collected using four different sampling techniques. Individuals from each taxa were collected in all three vegetation types, although the size of the individuals of some orders was smaller in Lythrum. Measurements of water quality indicated no significant (p less than or equal to 0.05) differences among the three vegetation types, despite the fact that Scirpus tended to be established in deeper water than Lythrum. Results indicate that monotypic stands of purple loosestrife are not lacking in aquatic invertebrates however, because our study was conducted in a mixed vegetation wetland at an intermediate stage of purple loosestrife infestation, our findings may not be representative of more extreme purple loosestrife invasions MH - Mexico|Baja California MH - USA PB - LAWRENCE: SOC WETLAND SCIENTISTS RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0277-5212 UR - ISI:000172918700013 L2 - aquatic invertebrates;bulrush (Scirpus acutus);cattail (Typha latifolia);purple loosestrife (Lythrum salicaria);vegetation;LAKE ERIE MARSHES; BIOLOGICAL-CONTROL; NORTH-AMERICA; MACROINVERTEBRATES; MACROPHYTES; PLANTS; RIVER; SIZE; GERMINATION; COMPETITION SO - Wetlands 2001 ;21(4):593-601 2992 UI - 13108 AU - Garibay EV AU - Torres IS AU - Nelson SE AU - Ziegler EE AU - Rogers RR AU - Janghorbani M AU - Fomon SJ AD - Univ Guadalajara, Hosp Civil Dr Juan I Menchaca, Inst Nutr Humana, Guadalajara 44430, Jalisco, MexicoUniv Iowa, Dept Pediat, Iowa City, IA 52242, USABioChemAnal Corp, Chicago, IL, USAFomon, SJ, Univ Iowa Hosp & Clin, Dept Pediat, 200 Hawkins Dr, Iowa City, IA 52242 USA TI - Iron absorption during recovery from malnutrition AB - Objective: In infants and children recovering from severe malnutrition, iron deficiency is common, and the ability to absorb iron during such recovery is uncertain. The objective of this study was to determine iron absorption during recovery from malnutrition. Methods: During the later stages of recovery from malnutrition, erythrocyte incorporation of orally administered Fe-58 was determined as a surrogate for iron absorption. Based on four indices, subjects were classified as iron-sufficient, iron-deficient or indeterminate. Results: Of the 25 subjects, 9 were classified as iron sufficient, 5 as indeterminate and 11 as iron deficient; all but 5 had evidence of inflammation or infection. Geometric mean erythrocyte incorporation of Fe-58 was 32.0% of the dose in the iron-deficient subjects, which was not significantly different (p = 0.073) than the 13.1% in the iron-sufficient subjects. Incorporation of Ss Fe by the iron-sufficient subjects did not differ significantly from that by normal subjects in the same age range. Surprisingly, we found no correlation of erythrocyte incorporation of Fe-58 and reticulocyte count. Conclusions: Even in the presence of infection or inflammation, iron absorption by children during a late stage of recovery from malnutrition is not impaired MH - USA MH - Mexico|Jalisco PB - NEW YORK: AMER COLL NUTRITION RP - NOT IN FILE U3 - TC 1 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0731-5724 UR - ISI:000170280100004 L2 - iron absorption;malnutrition;iron status;ERYTHROCYTE INCORPORATION; SERUM FERRITIN; INFANTS; CHILDREN SO - Journal of the American College of Nutrition 2001 ;20(4):286-292 2993 UI - 12668 AU - Garza-Gonzalez E AU - Bosques-Padilla FJ AU - Maldonado-Garza H AU - Tijerina-Menchaca R AU - Perez-Perez GI AD - UANL, Dept Microbiol, Monterrey, MexicoUANL, Univ Hosp, Monterrey, Neuvo Leon, MexicoNYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USA TI - Characterization of Helicobacter pylori strains isolated from the northeast region of Mexico MH - Mexico|Nuevo Leon MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000171232500121 SO - Gut 2001 ;49():A34-A35 2994 UI - 14554 AU - Garza J AU - Vargas R AU - Nichols JA AU - Dixon DA AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoPacific NW Natl Lab, Environm Mol Sci Labs, Richland, WA 99352, USAGarza, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, AP 55-534, Mexico City 09340, DF, Mexico TI - Orbital energy analysis with respect to LDA and self-interaction corrected exchange-only potentials AB - The self-interaction correction of Perdew and Zunger with the optimized effective potential using the Krieger-Li-Iafrate approximation is analyzed for atomic and molecular systems in the exchange-only context. Including the self-interaction correction (SIC) orbital by orbital shows that the appropriate asymptotic behavior of the exchange potential can be achieved if just the contribution of the highest occupied molecular orbital (HOMO) is considered. However, if a good description of the exchange potential in the valence region is required, and consequently a good description of the HOMO energy, then all electrons of the valence shell must be taken into account. In contrast, the lowest unoccupied molecular orbital (LUMO) is described adequately if just the HOMO SIC contribution is employed. In addition, if the lowest occupied orbital is also considered in the SIC approximation, there is an improvement in the description of the exchange potential in inner regions of an atom. When all electrons in an atom or in a molecule are considered in the SIC approximation, there exists a linear relationship between their occupied orbital energies and those obtained with the local density approximation (LDA). This indicates that the SIC and LDA occupied orbital energies are related by a shift. Furthermore, for a set of atoms or molecules there is a linear relationship between HOMO energies obtained with LDA and those obtained with the SIC approximation. Using both observations, the shift between the occupied orbital energies LDA and SIC is reported. We found that this shift (obtained for the occupied orbitals) cannot be applied to the virtual orbitals, in particular to the LUMO. However, we do find an additional linear relationship between LUMO energies obtained with LDA and those obtained with the SIC approximation. The difference between the LUMO and HOMO energy (GAP) obtained with the LDA and SIC approximations is compared with that obtained with an exact local-multiplicative exchange potential and all are compared with experimental vertical excitation energies. Whereas the LDA GAP underestimates the excitation energies, the GAP obtained with the SIC approximation and with an exact local-multiplicative exchange potential overestimates this quantity. From an analysis of the exchange energy for simple molecules, and with a similar approach to the modified X-alpha method, we found a linear relationship between the SIC and Hartree-Fock (HF) methods. We show numerically that the nondiagonal terms of the exact orbital representation of the exchange energy can be approximated by the SIC approach. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 41 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Review AV - English IS - 0021-9606 UR - ISI:000166213000005 L2 - DENSITY-FUNCTIONAL THEORY; LOCAL-SPIN-DENSITY; KOHN-SHAM ORBITALS; HARTREE-FOCK; EXCITATION-ENERGIES; INTRACAVITY ELECTRONS; STATISTICAL EXCHANGE; APPROXIMATIONS; STATES; SYSTEMS SO - Journal of Chemical Physics 2001 ;114(2):639-651 2995 UI - 12887 AU - Garza R AU - Vera J AU - Cardona C AU - Barcenas N AU - Singh SP AD - Ctr Int Agr Trop, Cali, ColombiaGarza, R, INIFAP, CEVAMEX, Programa Entomol, Apartado Postal 10, Chapingo 56230, Estado De Mexic, Mexico TI - Hypersensitive response of beans to Apion godmani (Coleoptera : Curculionidae) AB - High levels of resistance to Apion godmani Wagner have been reported in bean, Phaseolus vulgaris L., landraces from Mexico. We report on the role of hypersensitivity to A. godmani in five resistant and three susceptible bean genotypes. In susceptible genotypes (cultivars 'Canario 107', 'jamapa', and 'Zacatecas 45'), the eggs and first instars of A. godmani were embedded in the pod mesocarp and usually were surrounded by healthy tissue, In contrast, in resistant landraces ('Amarillo 154', 'Amarillo 155', 'J-117', 'Puebla 36', and 'Pinto 168'), necrotic tissues developed concentrically around the oviposition site, encapsulating eggs and dead larvae. An inverse relationship between percentage egg and larval encapsulation at the early immature pod stages and percentage of damaged seeds at harvest was found. Results indicate that hypersensitivity in developing pods plays an important role in antibiosis to A. godmani in beans. This information will facilitate future genetic and biochemical research and provide much needed information concerning the phenotypic basis of resistance to A. godmani in bean MH - Colombia MH - Mexico|Estado De Mexico PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000170920500025 L2 - Apion godmani;Phaseolus vulgaris;host plant resistance;hypersensitivity;antibiosis;PHASEOLUS-VULGARIS; PLANT-RESISTANCE; HESSIAN FLY; POD WEEVIL; COMMON; MECHANISM; WAGNER; WHEAT SO - Journal of Economic Entomology 2001 ;94(4):958-962 2996 UI - 13407 AU - Garzon IL AU - Artacho E AU - Beltran MR AU - Garcia A AU - Junquera J AU - Michaelian K AU - Ordejon P AU - Rovira C AU - Sanchez-Portal D AU - Soler JM AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 01000, DF, MexicoUniv Pais Vasco, Dept Fis Alicada 2, E-48080 Bilbao, SpainCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainUniv Barcelona, Barcelona 08028, SpainUniv Illinois, Dept Phys, Urbana, IL 61801, USAUniv Illinois, Mat Res Lab, Urbana, IL 61801, USAGarzon, IL, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Hybrid DNA-gold nanostructured materials: an ab initio approach AB - The controlled assembly of metal nanoparticles into macroscopic materials using DNA oligonucleotides has opened new directions of research in nanoscience and nanotechnology. Here, we describe recent ab initio calculations on structural and electronic properties of the subsystems forming these materials: bare and thiol-passivated gold nanoclusters, gold nanowires and fragments of DNA chains. Our results indicate that gold nanoclusters are distorted dramatically by a passivating methylthiol monolayer, that monatomic gold chains are stable in zigzag geometries and that dry acidic gimel -DNA is a good insulator These results provide useful insights towards the complete understanding, design and proper utilization of hybrid DNA-gold nanostructured materials MH - Mexico|Distrito Federal MH - Spain MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0957-4484 UR - ISI:000169442900012 L2 - AU NANOCLUSTERS; LARGE SYSTEMS; MOLECULES; CLUSTERS; PSEUDOPOTENTIALS; NANOPARTICLES; TRANSPORT; DYNAMICS; MODEL SO - Nanotechnology 2001 ;12(2):126-131 2997 UI - 13334 AU - Gasca R AU - Shih CT AD - El Colegio Fontera Sur, ECOSUR, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoTaiwan Fisheries Res Inst, Keelung 202, TaiwanCanadian Museum Nat, Ottawa, ON K1P 6P4, CanadaGasca, R, El Colegio Fontera Sur, ECOSUR, Unidad Chetumal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - Hyperiid amphipods from surface waters of the western Caribbean Sea (1991) AB - Surface zooplankton salnples were collected in a five-month schedule (February, March, May, August, and November 1991) off the eastern coast of the Yucatan Peninsula, westernmost portion of the Caribbean Sea. A taxonomic analysis of the pelagic Hyperiidea yielded 58 species. Lesrtrigonus bengalensis, Eupronoc intermedia, and Brachyscelus crusculum were the overall dominant species and represented more than 75% of the pelagic amphipod specimens collected from the area. Amphipods were most abundant during May, with an average of 309 org./1000 m(3); the minimum average density was recorded in November (62 org./1000 m(3)). Up to 90% of the total numbers of hyperiid amphipods, and most of the species recorded herein, were collected in night samples, thus agreeing with the general behaviour of the group as described in the literature. Some species were, however, recorded during the period of maximum daylight. Lestrigonus bengalensis, the most abundant species in our samples, has also been recorded as the most abundant in various other neritic and oceanic areas. This paper presents the first taxonomic and distributional information on this group in the westernmost part of the Caribbean Sea. The regional list of the group is expected to grow by sampling in deeper layers MH - Canada MH - Mexico|Quintana Roo MH - Taiwan PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 8 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000169723300006 SO - Crustaceana 2001 ;74():489-499 2998 UI - 13380 AU - Gasca R AU - Castellanos I AU - Biggs DC AD - El Colegio Frontera Sur, ECOSUR, Unidad Chetumal, Chetumal 77000, Q Roo, MexicoTexas A&M Univ, Dept Oceanog, College Stn, TX 77843, USAGasca, R, El Colegio Frontera Sur, ECOSUR, Unidad Chetumal, Zona Ind Na 2,Carr Chetumal Bacalar Km 2, Chetumal 77000, Q Roo, Mexico TI - Euphausiids (Crustacea, Euphausiacea) and summer mesoscale features in the Gulf of Mexico AB - Seventeen euphausiid species were identified from 97 zooplankton samples collected in the southern part of the Gulf of Mexico during July 1988. About 75% of adult individuals belonged to three species: Stylocheiron carinatum (28.3%), S. suhmi (25.5%) and Euphausia tenera (20.1%). Seaward of the continental shelf, between 61 and 443 adults 1000 m(-3) of water filtered were collected in the upper 200 m at night, compared with generally less than 20-94 adults 1000 m(-3) during daytime. Calyptopis larvae occurred in 78 tows, at mean density of 1346 1000 m(-3). Cluster analysis using Bray-Curtis ordination indicated there were day-night and neritic-oceanic differences in the euphausiid community. A separate ordination of deepwater night collections indicated there was no difference between the euphausiid numerical abundance at stations in the Bay of Campeche (area of divergence), compared with those made offshore within Lazy Eddy, a warm-core eddy (area of convergence) which had been shed from the Loop Current the previous Fall 1987. However, although euphausiid species richness was similar in both areas, the two most common species of Stylocheiron dominated the numerical abundance in Lazy Eddy, whereas species of Euphausia were co-dominant with those of Stylocheiron in the Bay of Campeche. These two genera were also co-dominant in the leading edge of a second warm-core eddy (Murphy) that had separated from the Loop Current in April 1988 MH - Mexico|Quintana Roo MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000169661700003 L2 - COLD-CORE RINGS; OF-MEXICO; WESTERN GULF; LOOP CURRENT; WARM-CORE; PLANKTON; SIPHONOPHORES SO - Bulletin of Marine Science 2001 ;68(3):397-408 2999 UI - 14411 AU - Gaspar EMM AD - Univ Nova Lisboa, Fac Ciencias & Tecnol, CQFB, Dept Quim, P-2825 Monte De Caparica, PortugalUniv Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoGaspar, EMM, Univ Nova Lisboa, Fac Ciencias & Tecnol, CQFB, Dept Quim, Quinta Torre, P-2825 Monte De Caparica, Portugal TI - Soldanelline B - The first acylated nonlinear tetrasaccharide macrolactone from the European Convolvulaceae Calystegia soldanella AB - The first acylated nonlinear tetrasaccharide resin glycoside, soldanelline B (1), and its fatty acid derivative soldanellic acid B (2), have been isolated from a Portuguese Convolvulaceae Calystegia soldanella. The structures were elucidated using high-field NMR spectroscopy, FAB mass spectrometry and chemical studies MH - Mexico|Distrito Federal MH - Portugal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000166621900017 L2 - Calystegia soldanella;Convolvulaceae;glycosides;lactones;natural products;oligosaccharides;RESIN GLYCOSIDES; IPOMOEA-STANS; SCAMMONIA; SEEDS; ACIDS; VII SO - European Journal of Organic Chemistry 2001 ;(2):369-373 3000 UI - 12176 AU - Gaudet DA AU - Fuentes-Davila G AU - De Pauw RM AU - Burnett PA AD - Agr & Agri Food Canada, Lethbridge Res Ctr, Lethbridge, AB T1J 4B1, CanadaCIMMYT, Mexico City 06600, DF, MexicoAgr & Agri Food Canada, Semiarid Prairie Agr Res Ctr, Swift Current, SK S9H 3X2, CanadaGaudet, DA, Agr & Agri Food Canada, Lethbridge Res Ctr, Box 3000, Lethbridge, AB T1J 4B1, Canada TI - Reactions of western Canadian spring wheat and triticale varieties to Tilletia indica, the causal agent of Karnal bunt AB - The reactions of 47 Canadian wheat and triticale cultivars to Tilletia indices Mitra, the causal agent of Karnal Bunt (KB), were evaluated in the field at Centro de Investigaciones Agricolas eel Noroeste (CIANO), Yaqui Valley, Mexico, during 1998 and 1999. The majority of lines and cultivars flowered during January and February, which coincided with the onset of cooler temperatures and high relative humidity required for optimum infection by the fungus. Canada Western Amber Durum (CWAD) and triticale were resistant, ranging from 0 to 6% infection. Canada Western Red Spring (CWRS) wheats were also generally resistant, but the cultivars Roblin, BW90 and Laura, and the experimental line Roblin*2/BW 553, were susceptible, ranging from 11 to 28% in treatments with the highest infection levels. Canada Western Extra Strong (OWES) wheats varied in reaction from moderately resistant to susceptible, ranging from 1 to 15% infection. Canada Prairie Spring (CPS) wheats were generally susceptible, exhibiting infection levels ranging from 5 to 31% infection in the most severely infected treatments. Canada Western Soft White Spring (CWSWS) wheats were uniformly susceptible; the highest recorded infection level among Canadian wheats was observed on AC Reed (38%) during 1999. The susceptibility of CPS and CWSWS cultivars may represent an increased risk to the establishment of KB if the fungus were to become introduced into western Canada MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: AGRICULTURAL INST CANADA RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0008-4220 UR - ISI:000172741900034 L2 - Karnal bunt;wheat;disease resistance;disease susceptibility;RESISTANCE; CULTIVARS; DISEASE; LAEVIS SO - Canadian Journal of Plant Science 2001 ;81(3):503-508 3001 UI - 12147 AU - Gavazzi G AU - Boselli A AU - Mayer L AU - Iglesias-Paramo J AU - Vilchez JM AU - Carrasco L AD - Univ Milano Bicocca, I-20126 Milan, ItalyLab Astrophys Marseille, F-13376 Marseille 12, FranceUniv Washington, Dept Astron, Seattle, WA 98195, USACSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUNAM, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoGavazzi, G, Univ Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy TI - 75 kiloparsec trails of ionized gas behind two irregular galaxies in A1367 AB - In a 6 hr H alpha exposure of the northwest region of the cluster of galaxies A1367, we discovered a 75 kpc cometary emission of ionized gas trailing behind two Irr galaxies. The H alpha trails correspond in position and length with tails of syncrotron radiation. At the galaxy side opposite to the tails, the two galaxies show bright H II regions aligned along arcs, where the star formation takes place at the prodigious rate of similar to1 M-. yr(-1). From the morphology of the galaxies and of the trailing material, we infer that the two galaxies are suffering from ram pressure due to their high-velocity motion through the cluster intergalactic medium. We estimate that similar to 10(9) M-. of gas, probably ionized in the giant H ii regions, is swept out, forming the tails. The tails cross each other at some 100 kpc from the present galaxy location, indicating that a major tidal event occurred some similar to 5 x 10(7) yr ago. We exclude that mutual harassment produced the observed morphology, and we show with numerical simulations that it could have marginally aided ram pressure stripping by loosening the potential well of the galaxies MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 30 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000172852800006 L2 - galaxies : clusters : individual (Abell 1367);galaxies : evolution;galaxies : irregular;intergalactic medium;methods : n-body simulations;3 PECULIAR GALAXIES; SPIRAL GALAXIES; CLUSTER GALAXIES; COMA SUPERCLUSTER; STAR-FORMATION; EVOLUTION; HARASSMENT; MATTER; A-1367; RADIO SO - Astrophysical Journal 2001 ;563(1):L23-L26 3002 UI - 13669 AU - Gazarian KG AU - Rowley MJ AU - Gazarian TG AU - Sotelo J AU - Garcia-Mendoza E AU - Hernandez R AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Biotechnol, Mexico City 04510, DF, MexicoMonash Univ, Dept Biochem & Mol Biol, Clayton, Vic 3168, AustraliaUNAM, Fac Med, Mexico City, DF, MexicoInst Nacl Neurol & Neurocirugia, Mexico City, DF, MexicoGazarian, KG, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Biotechnol, Apartado Postal 70228,Cuidad Univ, Mexico City 04510, DF, Mexico TI - Post-panning computer-aided analysis of phagotope collections selected with neurocysticercosis patient polyclonal antibodies: Separation of disease-relevant and irrelevant peptide sequences AB - The homology of peptide sequences selected from a 7mer phage display library with antibodies elicited by the multicelled parasite Taenia solium in cerebrospinal fluid acid serum of neurocysticercosis (NCC) patients and by antibodies of uninfected control patients with similar neurological complications of other ethiology (non-NCC) were analyzed using a PILEUP-Tudos sequence alignments program. The analysis generated dendrograms bearing two types of sequence clusters, those containing (1) only NCC patients-derived peptides and (2) both NCC- and control non-NCC - patient derivatives. By using ELISA, peptides that were selected by the antibodies were identified predominantly in the NCC-derived clusters. In repeated analysis in which sequences were added or removed, the first type of clusters maintained their structure, while the second type of clusters were split into many separate homology units dispersed throughout the guide tree. These results are interpreted as the ability of the analysis to segregate NCC-specific peptide sequences from other sequences. Altogether, this study demonstrates the high potential of the PILEUP-Tudos computer program to analyze phagotope collections recovered through biopanning with polyclonal antibodies elicited in patients by complex and as yet unknown multiple pathogenic antigens and to separate all phagotopes that are disease-relevant on the basis of the sequence homology MH - Australia MH - Mexico|Distrito Federal PB - HILVERSUM: BENTHAM SCIENCE PUBL LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemical Research Methods;Chemistry, Applied;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 1386-2073 UR - ISI:000168712300001 L2 - PHAGE-DISPLAY; MULTIPLE-SCLEROSIS; FLUID ANTIBODIES; LIBRARIES; EPITOPE; IDENTIFICATION; SERA; ALIGNMENT; STRATEGY SO - Combinatorial Chemistry & High Throughput Screening 2001 ;4(3):221-235 3003 UI - 12982 AU - Gazol A AU - Vazquez-Semadeni E AU - Sanchez-Salcedo FJ AU - Scalo J AD - UNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUNAM, Inst Astron, Mexico City 04510, DF, MexicoUniv Texas, Dept Astron, Austin, TX 78712, USAGazol, A, UNAM, Inst Astron, Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico TI - The temperature distribution in turbulent interstellar gas AB - We discuss the temperature distribution in a two-dimensional, thermally unstable numerical simulation of the warm and cold gas in the Galactic disk, including the magnetic field, self-gravity, the Coriolis force, stellar energy injection, and a realistic cooling function. We find that similar to 50% of the turbulent gas mass has temperatures in what would be the thermally unstable range if thermal instability were to be considered alone. This appears to be a consequence of there being many other forces at play than just thermal pressure, constituting a different process from that proposed in time-dependent models based on stochastic heating followed by cooling, although the latter mechanism may also be present. We also point out that a bimodal temperature probability distribution function is a simple consequence of the form of the interstellar cooling function and is not necessarily a signature of discontinuous phase transitions MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000170704700011 L2 - instabilities;ISM : kinematics and dynamics;ISM : structure;SUPERNOVA EXPLOSIONS; THERMAL-INSTABILITY; GALACTIC GAS; CLOUDS; MODEL; DISK; HALO SO - Astrophysical Journal 2001 ;557(2):L121-L124 3004 UI - 12436 AU - Gaztanaga E AU - Lobo JA AD - INAOE, Coordinac Astrofis Tonantzintla, Puebla 7200, MexicoUniv Barcelona, Dept Fis Fonamental, E-08028 Barcelona, SpainGaztanaga, E, INAOE, Coordinac Astrofis Tonantzintla, Apdo Postal 216 & 51, Puebla 7200, Mexico TI - Nonlinear gravitational growth inside and outside the standard cosmology AB - We reconsider the problem of nonlinear structure formation inside and outside General Relativity (GR), both in the weakly and strongly nonlinear regime. We show how these regimes can be explored observationally through clustering of high-order cumulants and through the epoch of formation, abundance and clustering of collapse structures, using Press and Schechter (1974, Astrophys. J. 187: 425-438) formalism and its extensions MH - Mexico|Puebla MH - Spain PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - S;Article AV - English IS - 0077-8923 UR - ISI:000171969300010 L2 - galaxies : formation, gravitation, instabilities;large-scale structure of the Universe;SPHERICAL COLLAPSE MODEL; GAUSSIAN INITIAL CONDITIONS; PERTURBATION-THEORY; VARYING-G SO - Onset of Nonlinearity in Cosmology 2001 ;927():110-126 3005 UI - 12944 AU - Gaztanaga E AU - Juszkiewicz R AD - Inst Nacl Astrofis Opt & Elect, Puebla 7200, MexicoCSIC, IEEC, ES-08034 Barcelona, SpainUniv Geneva, Dept Phys Theor, CH-1211 Geneva, SwitzerlandZielona Gora Univ, Inst Astron, PL-62565 Zielona Gora, PolandNicolaus Copernicus Astron Ctr, PL-00716 Warsaw, PolandGaztanaga, E, Inst Nacl Astrofis Opt & Elect, Apdo Postal 216 & 51, Puebla 7200, Mexico TI - Gravity's smoking gun? AB - We present a new constraint on the biased galaxy formation picture. Gravitational instability theory predicts that the two-point mass density correlation function, xi (r), has an inflection point at the separation r = r(0), corresponding to the boundary between the linear and nonlinear regime of clustering,xi similar or equal to 1. We show how this feature can be used to constrain the biasing parameter b(2) = xi (g)(r)/xi (r) on scales r similar or equal to r(0), where xi (g) is the galaxy-galaxy correlation function, which is allowed to differ from. We apply our method to real data: the,(r), estimated from the Automatic Plate Measuring (APM) galaxy survey. Our results suggest that the APM galaxies trace the mass at separations r greater than or similar to 5 5 h(-1) Mpc, where h is the Hubble constant in units of 100 km s(-1) Mpc(-1). The present results agree with earlier studies, based on comparing higher order correlations in the APM with weakly nonlinear perturbation theory. Both approaches constrain the b factor to be within 20% of unity. If the existence of the feature that we identified in the APM xi (g)(r)-the inflection point near xi (g) = 1-is confirmed by more accurate surveys, we may have discovered gravity's smoking gun: the long-awaited "shoulder" in, predicted by Gott and Rees 25 years ago MH - Mexico|Puebla MH - Poland MH - Spain MH - Switzerland PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000170794500001 L2 - cosmology : observations;cosmology : theory;large-scale structure of universe;APM GALAXY SURVEY; COLD DARK-MATTER; VELOCITY-FIELDS; POWER SPECTRUM; UNIVERSE; EVOLUTION; DENSITY SO - Astrophysical Journal 2001 ;558(1):L1-L4 3006 UI - 14330 AU - Gaztanaga E AU - Lobo JA AD - INAOE, Puebla 7200, MexicoCSIC, IEEC, ES-08034 Barcelona, SpainUniv Barcelona, Dept Fis Fonamental, E-08028 Barcelona, SpainGaztanaga, E, INAOE, Apdo Postal 216 & 51, Puebla 7200, Mexico TI - Nonlinear gravitational growth of large-scale structures inside and outside standard cosmology AB - We reconsider the problem of gravitational structure formation inside and outside general relativity (GR), in both the weakly and strongly nonlinear regime. We show how these regimes can be explored observationally through clustering of high-order cumulants and through the epoch of formation, abundance, and clustering of collapse structures, using Press-Schechter formalism and its extensions. We address the question of how different these predictions are when using a nonstandard theory of gravity. We study examples of cosmologies that do not necessarily obey Einstein's field equations : scalar-tensor theories (STT), such as Brans-Dicke (BD), parametrized with omega, a nonstandard parameterization of the Hubble law, H-2 = a(-3(1+epsilon)), or a nonstandard cosmic equation of state p = gamma rho, where gamma can be chosen irrespective of the cosmological parameters (Omega (M) and Omega (Lambda)). We present some preliminary bounds on gamma, omega, and epsilon from observations of the skewness and kurtosis in the Automated Plate Measuring (APM) Galaxy Survey. This test is independent of the overall normalization of rms fluctuations. We also show how abundances and formation times change under these assumptions. Upcoming data on nonlinear growth will place strong constraints on such variations from the standard paradigm MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166939900005 L2 - galaxies : formation;gravitation;instabilities;large-scale structure of universe;GAUSSIAN INITIAL CONDITIONS; APM GALAXY SURVEY; 3-POINT CORRELATION-FUNCTION; SPHERICAL COLLAPSE MODEL; DARK-MATTER COSMOGONY; PERTURBATION-THEORY; CORRELATION HIERARCHY; POWER SPECTRUM; COSMIC FIELDS; MERGER RATES SO - Astrophysical Journal 2001 ;548(1):47-59 3007 UI - 14444 AU - Gaztanaga E AU - Romeo A AU - Barriga J AU - Elizalde E AD - INAOE, Puebla 7200, MexicoCSIC, Inst Ciencies Espai, IEEC, ES-08034 Barcelona, SpainGaztanaga, E, INAOE, Apdo Postal 216 & 51, Puebla 7200, Mexico TI - Processing and compression of noise-dominated data: application to the cosmic microwave background data on board the Planck satellite AB - We address the problem of encoding and compressing data dominated by noise. Information is decomposed into 'reference' sequences plus arrays containing noisy differences susceptible to being described by a known probability distribution. One can then give reliable estimates of the optimal compression rates by estimating the corresponding Shannon entropy. As a working example, this idea is applied to an idealized model of the cosmic microwave background (CMB) data on board the Planck satellite. Data reduction is a critical issue in space missions because the total information that can be downloaded to Earth is sometimes limited by telemetry allocation. Similar limitations might arise in remotely operated ground based telescopes. This download-rate limitation could reduce the amount of diagnostics sent on the stability of the instruments and, as a consequence, curb the final sensitivity of the scientific signal. Our proposal for Planck consists of taking differences of consecutive circles at a given sky pointing. To a good approximation, these differences could be made independent of the external signal, so that they are dominated by thermal (white) instrumental noise, which is simpler to model than the sky signal. Similar approaches can be found in other individual applications. Generic simulations and analytical predictions show that high compression rates, c(r)similar to 10, can be obtained with minor or zero loss of sensitivity. Possible effects of digital distortion are also analysed. The proposed scheme is flexible and reliable enough to be optimized in relation to other critical aspects of the corresponding application. For Planck, this study constitutes an important step towards a more realistic modelling of the final sensitivity of the CMB temperature anisotropy maps MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000166574400005 L2 - methods : data analysis;methods : statistical;techniques : miscellaneous;cosmic microwave background;cosmology : observations SO - Monthly Notices of the Royal Astronomical Society 2001 ;320(1):12-20 3008 UI - 12101 AU - Gelb J AU - Ladman BS AU - Tamayo M AU - Gonzalez M AU - Sivanandan V AD - Univ Delaware, Coll Agr & Nat Resources, Dept Anim & Food Sci, Delaware Agr Expt Stn, Newark, DE 19717, USAFt Dodge Anim Hlth, Mexico City 03300, DF, MexicoBoehringer Ingelheim Vetmed, Guadalajara, Jalisco, MexicoGelb, J, Univ Delaware, Coll Agr & Nat Resources, Dept Anim & Food Sci, Delaware Agr Expt Stn, Newark, DE 19717 USA TI - Novel infectious bronchitis virus S1 genotypes in Mexico 1998-1999 AB - Seventeen infectious bronchitis virus (IBV) field isolate's recovered from commercial broiler flocks in Mexico were identified by reverse transcription-polymerase chain reaction cycle sequencing of the S I gene, The isolates were obtained from broilers on farms from the neighboring states of Queretaro and San Luis Potosi in 1998 and 1999. Flocks had an ongoing history of bacterial-complicated respiratory disease with mortality rates as high as 28% in spite of receiving live vaccinations for Massachusetts and Connecticut strains of IBV. Sequence analysis of the S I gene identified two unique genotypes chat have been described, as of this time, only, in Mexico and thus appear to represent. strains indigenous to the country The Mex/1765/99 genotype was isolated from 64% (11/17) of the respiratory disease outbreaks. Three isolates (18%) were similar to the BL-56 genotype, a unique Mexican IBV strain observed initially in 1996. In addition to the two indigenous strains, three isolates (18%) were found to be the Connecticut genotype MH - USA MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 6 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000172998200033 L2 - coronavirus;genotype;infectious bronchitis virus;IBV;Mexico;S1 gene;cycle sequencing;RT-PCR;chicken;S-1 GENE; IDENTIFICATION SO - Avian Diseases 2001 ;45(4):1060-1063 3009 UI - 13227 AU - Geller AM AU - Rothenberg SJ AU - Schnaas L AU - Saigado M AU - Casanueva E AU - Perroni E AU - Hudnell HK AU - Fox DA AD - USEPA, Res Triangle Pk, NC, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoNatl Inst Perinatol, Mexico City, DF, MexicoUniv Houston, Houston, TX, USA TI - Supernormal ERGs in children following low and moderate-level prenatal and postnatal lead exposure MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392104164 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S784-S784 3010 UI - 13516 AU - Geng M AU - Feng F AU - Gamboa SA AU - Sebastian PJ AU - Matchett AJ AU - Northwood DO AD - Ryerson Polytech Univ, Fac Engn & Appl Sci, Toronto, ON M5B 2K3, CanadaUniv Windsor, Windsor, ON N9B 3P4, CanadaUNAM, Ctr Invest Energia, Tomixco 62580, Morelos, MexicoUniv Teesside, Middlesbrough TS1 3BA, Cleveland, EnglandNorthwood, DO, Ryerson Polytech Univ, Fac Engn & Appl Sci, 350 Victoria St, Toronto, ON M5B 2K3, Canada TI - Electrocatalytic characteristics of the metal hydride electrode for advanced Ni/MH batteries AB - The electrocatalytic characteristics of a metal hydride (MH) electrode for advanced Ni/MH batteries include the hydrogen adsorption/ desorption capability at the electrode/electrolyte interface. The hydrogen reactions at the MH electrode/electrolyte interface an also related to factors such as the surface area of the MH alloy powder and the nature of additives and binder materials. The high-rats discharge capability of the negative electrode in a Ni/MH battery is mainly determined by the mass transfer process in the bulk MH alloy powder and the charge transfer process at the interface between the MH alloy powder and the electrolyte. In this: study, an AB(5)-type hydrogen-absorbing alloy, Mm (Ni, Co, Al, Mn)(5.02) (where Mm denotes Mischmetal, comprising 43.1 wt.% La, 3.5 wt.% Ce, 13.3 wt.% Pr and 38.9 wt.% Nd), was used as the negative MH electrode material. The MH electrode was charged and discharged for up to 200 cycles. The specific discharge capacity of the alloy electrode decreases from a maximum value of 290-250 mAh g(-1) after 200 charge/discharge cycles. A cyclic voltammetry technique is used to analyze the charge transfer reactions at the electrode/electrolyte interface and the hydrogen surface coverage capacity. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - United Kingdom MH - Mexico|Morelos PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Electrochemistry;Energy & Fuels U5 - J;Article AV - English IS - 0378-7753 UR - ISI:000169174600016 L2 - hydrogen-absorbing alloy;metal hydride electrode;hydrogen surface coverage;cyclic voltammetry SO - Journal of Power Sources 2001 ;96(1):90-93 3011 UI - 14513 AU - Geng M AU - Feng F AU - Sebastian PJ AU - Matchett AJ AU - Northwood DO AD - Ryerson Polytech Univ, Fac Engn & Appl Sci, Toronto, ON M5B 2K3, CanadaUniv Windsor, Windsor, ON N9B 3P4, CanadaUNAM, Ctr Invest Energia, Tomixco 62580, Morelos, MexicoUniv Teesside, Middlesbrough TS1 3BA, Cleveland, EnglandNorthwood, DO, Ryerson Polytech Univ, Fac Engn & Appl Sci, 350 Victoria St, Toronto, ON M5B 2K3, Canada TI - Charge transfer and mass transfer reactions in the metal hydride electrode AB - Charge transfer reaction across the electrode/electrolyte interface and hydrogen diffusion in the negative MH alloy electrode dominate the high-rate discharge capability of the metal hydride electrode in a nickel metal hydride (Ni/MH) battery. The mass transfer process in the MH electrode mainly involves hydrogen diffusion in the bulk MH alloy. The charge transfer reaction in the negative electrode reflects the capability of hydrogen reduction and oxidation reactions at the surface of the MH alloy powder. In this study, an AB(5)-type hydrogen-absorbing alloy was used as the negative electrode material. The rate-determining mass transfer process in the bulk MH alloy electrode was studied and analyzed using anodic polarization measurements The exchange current density, which is related to the charge transfer reaction, was analyzed by using the hydrogen equilibrium pressure. The estimation of hydrogen diffusion coefficient in the MH alloy is strongly dependent on the value of the effective reaction area of charge transfer reaction at the surface of the alloy powder. (C) 2000 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved MH - Canada MH - United Kingdom MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000166366700010 L2 - metal hydride electrode;effective reaction surface area;exchange current density;hydrogen diffusion coefficient;HYDROGEN; DISCHARGE SO - International Journal of Hydrogen Energy 2001 ;26(2):165-169 3012 UI - 13580 AU - Geoghegan J AU - Villar SC AU - Klepeis P AU - Mendoza PM AU - Ogneva-Himmelberger Y AU - Chowdhury RR AU - Turner BL AU - Vance C AD - Clark Univ, Dept Econ, Marsh Inst, Worcester, MA 01610, USAColegio de la Frontera Sur, Quintana Roo, MexicoColgate Univ, Dept Geog, Hamilton, NY 13346, USAClark Univ, Marsh Inst, Grad Sch Geog, Worcester, MA 01610, USAUS EPA, Natl Ctr Environm Econ, Washington, DC, USAColegio de la Frontera Sur, San Cristobal, Chiapas, MexicoGeoghegan, J, Clark Univ, Dept Econ, Marsh Inst, 950 Main St, Worcester, MA 01610 USA TI - Modeling tropical deforestation in the southern Yucatan peninsular region: comparing survey and satellite data AB - This paper presents some initial modeling results from a large, interdisciplinary research project underway in the southern Yucatan peninsular region. The aims of the project are: to understand, through individual household survey work, the behavioral and structural dynamics that influence land managers' decisions to deforest and intensify land use; model these dynamics and link their outcomes directly to satellite imagery; model from the imagery itself; and, determine the robustness of modeling to and from the satellite imagery. Two complementary datasets, one from household survey data on agricultural practices including information on socio-economic factors and the second from satellite imagery Linked with aggregate government census data, are used in two econometric modeling approaches. Both models test hypotheses concerning deforestation during different time periods in the recent past in the region. The first uses the satellite data, other spatial environmental variables, and aggregate socio-economic data (e.g., census data) in a discrete-choice (logit) model to estimate the probability that any particular pixel in the landscape will be deforested, as a function of explanatory variables. The second model uses the survey data in a cross-sectional regression (OLS) model to ask questions about the amount of deforestation associated with each individual farmer and to explain these choices as a function of individual socio-demographic, market, environmental, and geographic variables, in both cases, however, the choices of explanatory variables are informed by social science theory as to what are hypothesized to affect the deforestation decision (e.g., in a von Thunen model, accessibility is hypothesized to affect choice; in a Ricardian model, land quality; in a Chayanovian model, consumer-labor ratio). The models ask different questions using different data, but several broad comparisons seem useful. While most variables are statistically significant in the discrete choice model, none of the location variables are statistically significant in the continuous model. Therefore, while location affects the overall probability of deforestation, it does not appear to explain the total amount of deforestation on a given location by an individual. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Chiapas MH - Mexico|Quintana Roo PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 50 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000169062400003 L2 - land-use/cover change;econometric models;survey and satellite data;tropical deforestation;Mexico;LAND-USE; ROADS SO - Agriculture Ecosystems & Environment 2001 ;85(1-3):25-46 3013 UI - 12292 AU - Georgellis D AU - Kwon O AU - Lin ECC AU - Wong SM AU - Akerley BJ AD - Univ Michigan, Sch Med, Dept Microbiol & Immunol, Ann Arbor, MI 48109, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoHarvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115, USAAkerley, BJ, Univ Michigan, Sch Med, Dept Microbiol & Immunol, 1150 W Med Ctr Dr, Ann Arbor, MI 48109 USA TI - Redox signal transduction by the ArcB sensor kinase of Haemophilus influenzae lacking the PAS domain AB - The Arc (anoxic redox control) two-component signal transduction system of Escherichia coli, which comprises the tripartite ArcB sensor kinase and the ArcA response regulator, modulates the expression of numerous operons in response to redox conditions of growth. We demonstrate that the arcA and arcB genes of Haemophilus influenzae specify a two-component system. The Arc proteins of the two bacterial species sufficiently resemble each other that they can participate in heterologous transphosphorylation in vitro. Moreover, the Arc system of H. influenzae mediates transcriptional control according to the redox condition of growth both autologously in its own host and homologously in E. coli, indicating a high degree of functional conservation of the signal transduction system. The H. influenzae ArcB, however, lacks the PAS domain present in the region of E. coli ArcB; linking the transmembrane to the cytosolic catalytic domains. Because the PAS domain participates in signal reception in a variety of sensory proteins, including sensors of molecular oxygen and redox state, a similar role was previously ascribed to it in ArcB. Our results demonstrate that the ArcB protein of H. influenzae mediates signal transduction in response to redox conditions of growth despite the absence of the PAS domain MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000172390500028 L2 - ESCHERICHIA-COLI; IN-VITRO; 2-COMPONENT SYSTEM; RHIZOBIUM-MELILOTI; OMPC GENES; PHOSPHORELAY; PROTEIN; PHOSPHORYLATION; OXYGEN; EXPRESSION SO - Journal of Bacteriology 2001 ;183(24):7206-7212 3014 UI - 12739 AU - Gerashchenko D AU - Salin-Pascual R AU - Shiromani PJ AD - W Roxbury VA Med Ctr, W Roxbury, MA 02132, USAHarvard Univ, Sch Med, W Roxbury, MA 02132, USANatl Autonomous Univ Mexico, Fac Med, Mexico City 04510, DF, MexicoShiromani, PJ, W Roxbury VA Med Ctr, 1400 VFW Pkwy, W Roxbury, MA 02132 USA TI - Effects of hypocretin-saporin injections into the medial septum on sleep and hippocampal theta AB - Neurons containing the peptide hypocretin, also known as orexin, were recently implicated in the human sleep disorder narcolepsy. Hypocretin neurons are located only in the lateral hypothalamus from where they innervate virtually the entire brain and spinal cord. This peptide is believed to be involved in regulating feeding and wakefulness. However, to fully understand what other behaviors are regulated by this peptide it is necessary to investigate each hypocretin target site. In the present study, we focus on one hypocretin target site, the medial septum, where there is a dense collection of hypocretin-2 receptor-containing cells, and degenerating axons are present here in canines with narcolepsy [J. Neurosci. 19 (1999) 248]. We utilize a saporin toxin conjugated to the hypocretin receptor binding ligand, hypocretin-2, and find that when this toxin is injected into the medial septum, it lesions the parvalbumin and cholinergic neurons. We contrast the effects of the hypocretin-saporin with another saporin conjugated toxin, 192 IgG-saporin, that lesions only the cholinergic neurons in the basal forebrain. 192 IgG-saporin reduced theta activity, a finding consistent with previous reports [J. Neurophysiol. 79 (1998) 1633; Neurodegeneration 4 (1995) 61; Neuroscience 62 (1994) 1033]. However, hypocretin-saporin completely eliminated hippocampal theta activity by day 12, indicating that parvalbumin-containing cells in the medial septum generate theta. The daily amount of sleep and wakefulness were not different between hypocretin-saporin, 192 IgG-saporin, or saline-treated rats. The homeostatic response to 12 h prolonged wakefulness was also not affected in hypocretin-saporin lesioned rats. These findings suggest that hypocretin neurons could facilitate theta generation during episodes of purposeful behavior by activating GABAergic neurons in the MS/VDB. In this way, hypocretin, which is implicated in feeding, energy metabolism and wakefulness, serves to influence cognitive processes critical for the animal's survival. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 24 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000171383100014 L2 - theta rhythm;medial septum;hypocretin;sleep;immunohistochemistry;RAT-BRAIN; ELECTRICAL-STIMULATION; CHOLINERGIC SYSTEM; CANINE NARCOLEPSY; SELECTIVE LESION; NGF RECEPTOR; SPINAL-CORD; NEURONS; NUCLEUS; 192-IGG-SAPORIN SO - Brain Research 2001 ;913(1):106-115 3015 UI - 12881 AU - Gerashchenko D AU - Kohls MD AU - Greco M AU - Waleh NS AU - Salin-Pascual R AU - Kilduff TS AU - Lappi DA AU - Shiromani PJ AD - W Roxbury Vet Affairs Med Ctr, W Roxbury, MA 02132, USAHarvard Univ, Sch Med, W Roxbury, MA 02132, USAUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoSRI Int, Menlo Pk, CA 94025, USAAdv Targeting Syst, San Diego, CA 92121, USAShiromani, PJ, W Roxbury Vet Affairs Med Ctr, 1400 VFW Pkwy, W Roxbury, MA 02132 USA TI - Hypocretin-2-saporin lesions of the lateral hypothalamus produce narcoleptic-like sleep behavior in the rat AB - Hypocretins (Hcrts) are recently discovered peptides linked to the human sleep disorder narcolepsy. Humans with narcolepsy have decreased numbers of Hcrt neurons and Hcrt-null mice also have narcoleptic symptoms. Hcrt neurons are located only in the lateral hypothalamus (LH) but neither electrolytic nor pharmacological lesions of this or any other brain region have produced narcoleptic-like sleep, suggesting that specific neurons need to be destroyed. Hcrt neurons express the Hcrt receptor, and to facilitate lesioning these neurons, the endogenous ligand hypocretin-2/orexin B (Hcrt2) was conjugated to the ribosome-inactivating protein saporin (SAP). In vitro binding studies indicated specificity of the Hcrt2-SAP because it preferentially bound to Chinese hamster ovary cells containing the Hcrt/orexin receptor 2 (HcrtR2/OX2R) or the Hcrt/orexin receptor 1 (HcrtR1/OX1R) but not to Kirsten murine sarcoma virus transformed rat kidney epithelial (KNRK) cells stably transfected with the substance P (neurokinin-1) receptor. Administration of the toxin to the LH, in which the receptor is known to be present, eliminated some neurons (Hcrt, melanin-concentrating hormone, and adenosine deaminase-containing neurons) but not others (a-melanocyte-stimulating hormone), indicating specificity of the toxin in vivo. When the toxin was administered to the LH, rats had increased slow-wave sleep, rapid-eye movement (REM) sleep, and sleep-onset REM sleep periods. These behavioral changes were negatively correlated with the loss of Hcrt-containing neurons but not with the loss of adenosine deaminase-immunoreactive neurons. These findings indicate that damage to the LH that also causes a substantial loss of Hcrt neurons is likely to produce the multiple sleep disturbances that occur in narcolepsy MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 80 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000170922800031 L2 - hypothalamus;peptides;lesion;sleep;REM sleep;circadian rhythm;RIBOSOME-INACTIVATING PROTEINS; SUPRACHIASMATIC NUCLEI; CIRCADIAN-RHYTHMS; CANINE NARCOLEPSY; OREXIN; NEURONS; RECEPTOR; WAKING; BRAIN; PROJECTIONS SO - Journal of Neuroscience 2001 ;21(18):7273-7283 3016 UI - 13627 AU - Gerashchenko D AU - Salin-Pascual R AU - Greco M AU - Kilduff T AU - Lappi D AU - Shiromani P AD - W Roxbury VA Med Ctr, W Roxbury, MA, USAHarvard Univ, Sch Med, W Roxbury, MA, USAUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoSRI Int, Menlo Park, CA 94025, USAAdvanced Targeting Syst, San Diego, CA, USA TI - Hypocretin-saporin induced lesion of the lateral hypothalamus produces narcoleptic-like sleep in rats MH - Mexico|Distrito Federal MH - USA PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000168230900042 SO - Sleep 2001 ;24():A25-A26 3017 UI - 13055 AU - German G AU - Ross G AU - Sarkar S AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Oxford, Oxford OX1 3NP, EnglandGerman, G, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Low-scale inflation AB - We show that the scale of the inflationary potential may be the electroweak scale or even lower, while still generating an acceptable spectrum of primordial density perturbations. Thermal effects readily lead to the initial conditions necessary for low scale inflation to occur, and even the moduli problem can be evaded if there is such an inflationary period. We discuss how low scale inflationary models may arise in supersymmetric theories or in theories with large new space dimensions. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 31 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000170480500016 L2 - EXTRA DIMENSION; COSMOLOGICAL EXPANSION; CHAOTIC INFLATION; HYBRID INFLATION; TERM INFLATION; ENTROPY CRISIS; EARLY UNIVERSE; ART.; SUPERGRAVITY; BRANE SO - Nuclear Physics B 2001 ;608(1-2):423-450 3018 UI - 11977 AU - Gernandt DS AU - Liston A AU - Pinero D AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USAGernandt, DS, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Apartado Postal 70-275,Ciudad Univ,Codigo Postal, Mexico City 04510, DF, Mexico TI - Variation in the nrDNA ITS of Pinus subsection Cembroides: Implications for molecular systematic studies of pine species complexes AB - The pinyon pines (Pinus subsection Cembroides), distributed in semiarid regions of the western United States and Mexico, include a mixture of relictual and more recently evolved taxa. To investigate relationships among the pinyons, we screened and partially sequenced 3000-bp clones of the nuclear ribosomal DNA internal transcribed spacer (ITS) region for 16 taxa from subsect. Cembroides and nine representatives from four other subsections of subgenus Strobus. Restriction digests of clones reveal within-individual heterogeneity, suggesting that concerted evolution is operating slowly on the ITS in pine species. Two ITS clones were identified as pseudogenes. Tandem surepeats in the ITS1 form stem loops comparable to those in other genera of Pinaceae and may be promoting recombination between rDNA repeats, resulting in ITS1 chimeras. Within the pinyon clade, phylogenetic structure is present, but different clones from the same (or different) individuals of a species are polyphyletic, indicating that coalescence of ITS copies within individual genomes predates evolutionary divergence in the group. At the level of subsection and above, the ITS region corresponds well with morphological and cpDNA evidence. Except for P. nelsonii, the pinyons are monophyletic, with both subsect. Cembroides and P. nelsonii forming a clade with the foxtail and bristlecone pines (subsect. Balfourianae) of western North America. (C) 2001 Elsevier Science MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000173251300010 L2 - NUCLEAR RIBOSOMAL DNA; INTERNAL TRANSCRIBED SPACER; NUCLEOTIDE-SEQUENCE; PINYON PINES; SYLVESTRIS L; SCOTS PINE; P-MARIANA; RNA GENES; EVOLUTION; REGION SO - Molecular Phylogenetics and Evolution 2001 ;21(3):449-467 3019 UI - 12315 AU - Gervids VI AU - Kogan VI AU - Morozov DK AD - Moscow Engn Phys Inst, Moscow 115409, RussiaRussian Res Ctr, Kurchatov Inst, Inst Nucl Fus, Moscow 123182, RussiaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, CU, Mexico City 04510, DF, MexicoGervids, VI, Moscow Engn Phys Inst, Kashirskoe Sh 31, Moscow 115409, Russia TI - Reduced models of the dynamics of light impurity stripping AB - "Closed" and "open" reduced models of two or three most abundant light impurity ions in an optically thin hydrogen plasma are considered. The models are shown to satisfactorily describe the average ion charge and radiative losses within a wide range of parameters typical of laboratory and astrophysical plasmas, including the case when the relaxation time of the impurity distribution over ionization states is comparable to or longer than the characteristic times of the most important dynamic processes. The potentialities of the models are demonstrated using the carbon impurity as an example. The models proposed make it possible to analytically study the dynamics of a radiating plasma, obtain qualitatively new results, and significantly reduce the computation time when solving complicated self-consistent dynamical problems. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1063-780X UR - ISI:000172324500004 L2 - SEEDED RADIATIVE PLASMAS; OPTICALLY THIN PLASMAS; WAVES; INSTABILITIES; TEMPERATURE; BALANCE; TOKAMAK SO - Plasma Physics Reports 2001 ;27(11):938-946 3020 UI - 12027 AU - Gielen M AU - Kemmer M AU - Camacho CC AU - Willem R AU - Tiekink ERT AD - Free Univ Brussels, B-1050 Brussels, BelgiumFree Univ Brussels, Gen & Organ Chem Unit, AOSC, Fac Sci Appl, B-1050 Brussels, BelgiumFree Univ Brussels, High Resolut NMR Ctr, HNMR, B-1050 Brussels, BelgiumUniv Autonoma Metropolitana, Unidad Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoNatl Univ Singapore, Dept Chem, Singapore 117543, SingaporeTiekink, ERT, Free Univ Brussels, Av FD Roosevelt 50, B-1050 Brussels, Belgium TI - Crystal structure of zig-zag polymeric TRI-n-butyltin(IV) 3,4-metryleniedioxyphenylacetate MH - Belgium MH - Mexico|Distrito Federal MH - Singapore PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0334-7575 UR - ISI:000173080300012 SO - Main Group Metal Chemistry 2001 ;24(12):873-874 3021 UI - 12956 AU - Gies H AU - Schubert C AD - CERN, Div Theory, CH-1211 Geneva 23, SwitzerlandUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoCalif Inst Phys & Astrophys, Palo Alto, CA, USAGies, H, CERN, Div Theory, CH-1211 Geneva 23, Switzerland TI - Vacuum polarisation tensors in constant electromagnetic fields: Part III AB - The string-inspired technique is used for a first calculation of the one-loop axialvector vacuum polarisation in a general constant electromagnetic field. A compact result is reached for the difference between this tensor and the corresponding vector vacuum polarisation. This result is confirmed by a Feynman diagram calculation. Its physical relevance is briefly discussed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - Switzerland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000170758600003 L2 - WORLDLINE PATH-INTEGRALS; MAGNETIC-FIELD; DERIVATIVE EXPANSION; POLARIZATION TENSORS; ENERGY NEUTRINO; PAIR PRODUCTION; GAUGE-THEORIES; COUPLINGS; AMPLITUDES; FERMIONS SO - Nuclear Physics B 2001 ;609(3):313-324 3022 UI - 14219 AU - Gil-Villegas A AU - Galindo A AU - Jackson G AD - Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2BY, EnglandInst Mexicano Petr, Mol Simulat Program, Mexico City 07730, DF, MexicoUniv Guanajuato, Inst Fis, Leon 37150, MexicoGalindo, A, Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, Prince Consort Rd, London SW7 2BY, England TI - A statistical associating fluid theory for electrolyte solutions (SAFT-VRE) AB - A general theory for electrolyte solutions is examined within the framework of the statistical associating fluid theory for potentials of variable range (SAFT-VR). A first extension of the theory (SAFT-VRE) has already been used to describe the thermodynamics and phase equilibria of aqueous solutions of alkali-halide salts [GALINDO, A., GIL-VILLEGAS, A., JACKSON, G. and BURGESS, A. N., 1999, J. phys. Chem., 103, 10272]. The approach incorporates separate contributions describing the monomer, associating and ionic interactions. In the spirit of the SAFT-VR approach the monomer contribution is written as a high-temperature perturbation expansion up to second order; the separate effects of solvent-solvent, solvent-ion and ion-ion interactions on the phase equilibria are studied. Water is taken to be the solvent throughout the study, with the same four-site model and parameters as in the previous work. The association contribution is essential to account for the hydrogen bonding interactions present in water. The effects of ion pairing and solvent-ion association are also examined. For the ionic contribution several levels of approximation are discussed. The effect of the different molecular parameters on the phase behaviour of a model aqueous solution is examined for the different choices MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 32 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000167159100005 L2 - DIRECTIONAL ATTRACTIVE FORCES; PRESSURE PHASE-EQUILIBRIA; THERMODYNAMIC PERTURBATION-THEORY; MULTIPLE BONDING SITES; LENNARD-JONES FLUIDS; VARIABLE RANGE; AQUEOUS-SOLUTIONS; CHAIN MOLECULES; BINARY-MIXTURES; PRIMITIVE MODEL SO - Molecular Physics 2001 ;99(6):531-546 3023 UI - 12735 AU - Gimenez AVF AU - Garcia-Carreno FL AU - del Toro MAN AU - Fenucci JL AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja California, MexicoUniv Nacl Mar Del Plata, Fac Ciencias Exactas & Nat, Dept Ciencias Marinas, CONICET, Mar Del Plata, ArgentinaGarcia-Carreno, FL, Ctr Invest Biol Noroeste, AP 128, La Paz 23000, Baja California, Mexico TI - Digestive proteinases of red shrimp Pleoticus muelleri (Decapoda, Penaeoidea): partial characterization and relationship with molting AB - The present study describes the activity and some characteristics of proteinases in the hepatopancreas of red shrimp Pleoticus muelleri during the different stages of the molting cycle. Proteolytic activity was highest between pH 7.5 and 8. The hepatopancreatic protein content in the premolt stage was higher than in the other stages of the molting cycle (P < 0.05). No significant differences were found in total proteolytic activity in the hepatopancreas when comparing molting stages. The proteolytic activity of the P. muelleri hepatopancreas enzyme preparations is the main responsibility of serine proteinases. TLCK, a trypsin inhibitor, reduced azocasein hydrolysis between 26% (intermolt) and 37% (premolt). TPCK, a chymotrypsin inhibitor, did not decrease hydrolytic activity, except for in postmolt. Low trypsin and chymotrypsin activities were found during intermolt, and increased in postmolt. The electrophoretogram of the enzyme extracts shows 12 bands of activity during intermolt (from 16.6 to 53.1 kDa). Some fractions were not detected in the postmolt and premolt stages. Three low molecular weight trypsin forms (17.4, 19.1 and 20 kDa) were found in all molting stages. One band of chymotrypsin (21.9 kDa) was observed in all molting stages. High molecular mass active bands (66-205 kDa) could not be characterized with inhibitors. Comparison of the protease-specific activity of the hepatopancreas of some species indicated a relationship between digestive enzyme activity and feeding habits of the shrimp. Omnivorous shrimp, such as Penaeus vannamei (syn: Litopenaeus vannamei) and Penaeus monodon, showed higher protease activity than the carnivorous shrimp, Penaeus californiensis (syn: Farfantepenaeus californiensis) and P. muelleri. In fact, the enzymatic activity in the hepatopancreas of P. muelleri showed variations in relation to feeding habit and molting cycle. (C) 2001 Elsevier Science Inc. All rights reserved MH - Argentina MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 1096-4959 UR - ISI:000171356000006 L2 - digestive enzymes;molting;Pleoticus muelleri;protein digestion;proteases;PENAEUS-VANNAMEI BOONE; DIETARY-PROTEIN; ENZYME-ACTIVITIES; PURIFICATION; CRUSTACEA; PROTEASES; MONODON; DIGESTIBILITY; JAPONICUS; CHYMOTRYPSINS SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2001 ;130(3):331-338 3024 UI - 12353 AU - Girciene O AU - Ramanauskas R AU - Castro P AU - Bartolo-Perez P AD - Inst Chem, Corros Res Dept, LT-2600 Vilnius, LithuaniaUniv Merida, IPN, CINVESTAV, Dept Appl Phys, Merida 97310, MexicoGirciene, O, Inst Chem, Corros Res Dept, LT-2600 Vilnius, Lithuania TI - Corrosion behaviour of Zn and Zn alloy coatings in alkaline media AB - The corrosion behaviour of electrodeposited Zn, Zn-Co, Zn-Fe and Zn-Ni coatings without and with chromate films it-as studied in alkaline solutions and mortar probes, DC polarization measurements were used for electrochemical characterisation of the investigated samples. while AES XPS techniques were applied for the chromate film analysis. The stability of the anodically formed oxide films on unchromated coatings appeared to be dependent on their composition. The oxide layer stability in Cl free NaOH solution was higher for Zn-Ni and Zn-Co alloys. while introduction of Cl ions caused lowering of stability especially for Zn-Ni coating. The detected corrosion current values implied that unchromated Zn alloys did nor possess higher corrosion resistance in alkaline media containing Cl ions. Meanwhile, chromated Zn-Co coatings exhibited the beneficial effect of alloying for corrosion in alkaline solutions and concrete. A higher concentration of Cr(VI) compounds in the passive chromate layer of the alloyed sample may be the reason for its superior corrosion resistance MH - Lithuania MH - Mexico|Yucatan PB - BIRMINGHAM: INST METAL FINISHING RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0020-2967 UR - ISI:000172230600005 L2 - Zn electrodeposits;corrosion;passive film;alkaline media;mortar;CHLORIDE-CONTAMINATED CONCRETE; ZINC; RESISTANCE; STEEL SO - Transactions of the Institute of Metal Finishing 2001 ;79():199-203 3025 UI - 12407 AU - Giuliano AR AU - Papenfuss M AU - Abrahamsen M AU - Denman C AU - de Zapien JG AU - Henze JLN AU - Ortega L AU - de Galaz EMB AU - Stephan J AU - Feng J AU - Baldwin S AU - Garcia F AU - Hatch K AD - Univ Arizona, Arizona Canc Ctr, Tucson, AZ 85724, USAUniv Arizona, Rural Hlth Off, Tucson, AZ 85724, USAUniv Arizona, Dept Pathol, Tucson, AZ 85724, USAUniv Arizona, Dept Obstet & Gynecol, Tucson, AZ 85724, USAColegio Sonora, Hermosillo 83000, Sonora, MexicoSecretaria Salud Publ Sonora, Hermosillo 83000, Sonora, MexicoISSSTE, Hermosillo 83000, Sonora, MexicoArizona Dept Hlth Serv, Phoenix, AZ 85004, USAGiuliano, AR, Univ Arizona, Arizona Canc Ctr, 1515 N Campbell Ave,Room 4977C, Tucson, AZ 85724 USA TI - Human papillomavirus infection at the United States-Mexico border: Implications for cervical cancer prevention and control AB - The United States-Mexico border is a region comprised of a country with one of the highest rates of invasive cervical cancer (Mexico) and a country with one of the lowest rates (United States). Recent evidence clearly indicates that human papillomavirus (HPV) infection is the cause of cervical cancer. The distribution of specific types of HPV is known to vary in different regions of the world, as do the cofactors that may inhibit or promote HPV carcinogenesis. Estimating the prevalence of oncogenic HPV is needed for guiding vaccine development. The purpose of this study was to determine the prevalence of oncogenic and nononcogenic HPV types and risk factors for HPV among women residing along the United States-Mexico border. A cross-sectional study of 2319 women, ages 15-79 years, self-referring for gynecological care was conducted between 1997 and 1998. HPV was detected by PCR using the PYGMY 09/11 LI consensus primer, and HPV genotyping was conducted using the reverse line blot method. Overall, the HPV prevalence was 14.4% with no significant differences observed by country after adjustment for age. HPV 16 was the most commonly detected HPV type in both the United States and Mexico. Among women with high-grade squamous intraepithelial lesions, HPV types 58, 45, 51, 31, 35, 55, and 73 were most common in Mexico, and HPV types 18, 31, 35, 51, 52, and 58 were most common in the United States. In both countries, HPV prevalence declined linearly with age from 25% among women ages 15-19 years to 5.3% among women 56-65 years. Factors significantly independently associated with HPV infection were older age [adjusted odds ratio (AOR) = 0.15 for ages 56-65 years compared with those 15-19 years], a marital status other than married (AOR = 1.58-3.29), increased numbers of lifetime male partners (AOR = 3.8 for greater than or equal to 10 partners compared with I partner), concurrent infection with Chlamydia trachomatis (AOR = 1.79), ever use of Norplant (AOR = 2.69), and current use of injectable contraceptives (AOR = 2.29). Risk factors for HPV infection did not differ by country. Results from this study suggest that in addition to HPV 16 and 18, HPV types 31, 45, 51, and 58 should be considered for inclusion in an HPV prevention vaccine for distribution in Mexico MH - USA MH - Mexico|Sonora PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 36 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1055-9965 UR - ISI:000172154100004 L2 - CYTOLOGICALLY NORMAL WOMEN; HERPES-SIMPLEX VIRUS; HIGH-RISK AREA; CIGARETTE-SMOKING; SEXUAL-BEHAVIOR; DETERMINANTS; PROGESTERONE; WORLDWIDE; HORMONES; TRANSFORMATION SO - Cancer Epidemiology Biomarkers & Prevention 2001 ;10(11):1129-1136 3026 UI - 12833 AU - Glenn EP AU - Lee C AU - Valdes-Casillas C AD - Environm Res Lab, Tucson, AZ 85706, USACalif State Univ Long Beach, Dept Geog, Long Beach, CA 90840, USAInst Tecnol & Estudios Super Monterrey, Guaymas 85400, Sonora, MexicoGlenn, EP, Environm Res Lab, 2601 E Airport Dr, Tucson, AZ 85706, USA TI - Introduction MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Environmental Sciences U5 - J;Editorial Material AV - English IS - 0140-1963 UR - ISI:000171097000001 SO - Journal of Arid Environments 2001 ;49(1):1-4 3027 UI - 12834 AU - Glenn EP AU - Zamora-Arroyo F AU - Nagler PL AU - Briggs M AU - Shaw W AU - Flessa K AD - Environm Res Lab, Tucson, AZ 85706, USAConservat Int, Guaymas, MexicoRincon & Sonoran Inst, Tucson, AZ, USAUniv Arizona, Wildlife & Fisheries Program, Tucson, AZ, USAUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAGlenn, EP, Environm Res Lab, 2601 E Airport Dr, Tucson, AZ 85706, USA TI - Ecology and conservation biology of the Colorado River delta, Mexico AB - The Colorado River delta in Mexico has been partially revegetated following 20 years of water flows from the United States. Lake Powell, the last major impoundment built on the river, filled in 1981. Since then, flood flows in the main channel of the river have occurred in El Nino cycles, and have returned native trees and other vegetation to the riparian corridor. This vegetation provides a migration route for endangered southwestern willow flycatchers (Empidonax traillii) and other migratory birds moving from Mexico to the United States for summer nesting. Agricultural drain water from the Wellton-Mohawk Irrigation District conveyed to the delta since 1977 has created Cienega de Santa Clara, a 4200-ha Typha domengensis marsh containing the largest remaining population of the endangered Yuma clapper rail (Rallus longirostris yumanensis), plus numerous species of migratory and resident waterfowl. Populations in the marine part of the delta have been severely affected by the lack of river flow, but some species have responded positively to renewed flows. Currently, there are 170,000 ha of natural areas in the lower delta in Mexico, containing riparian, wetland and intertidal habitats. Much of this land as well as the adjacent marine zone is protected in the Biosphere Reserve of the Upper Gulf of California and Colorado River Delta. Natural resource managers, scientists and non-governmental environmental groups in Mexico and the United States are exploring conservation measures that can provide water and protection for these areas for the future. (C) 2001 Academic Press MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 14 U4 - Ecology;Environmental Sciences U5 - J;Review AV - English IS - 0140-1963 UR - ISI:000171097000002 L2 - Colorado river;El Nino delta;biosphere reserve;estuary;riparian;wetland;desert river;GULF-OF-CALIFORNIA; DE-SANTA-CLARA; LIFE-HISTORY; RIO-COLORADO; CIENEGA; DISCHARGE; CHENIERS; VAQUITA; WETLAND SO - Journal of Arid Environments 2001 ;49(1):5-15 3028 UI - 13048 AU - Goberna MA AU - Lopez MA AU - Todorov MI AD - Univ Alicante, Fac Sci, Dept Stat & Operat Res, Alicante 03071, SpainBUAP FCFM, Puebla 72000, MexicoGoberna, MA, Univ Alicante, Fac Sci, Dept Stat & Operat Res, Alicante 03071, Spain TI - On the stability of the feasible set in linear optimization AB - This paper deals with the stability of two families of linear optimization problems. each one formed by the dual problems to the members of the other family. We characterize the problems of these families that are stable in the sense that they remain consistent (inconsistent) under sufficiently small arbitrary perturbations of all the data. This characterization is established in terms of the lower semicontinuity property of the feasible set mapping and the boundedness of the optimal set of the corresponding coupled problem. Other continuity properties of the feasible set mapping are also derived. This stability theory extends some well-known theorems of Williams and Robinson on the stability of ordinary linear programming problems to linear optimization problems with infinitely many variables or constraints MH - Mexico|Puebla MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0927-6947 UR - ISI:000170401000007 L2 - stability;perturbations;point-to-set maps;linear programming;INEQUALITY SYSTEMS SO - Set-Valued Analysis 2001 ;9(1-2):75-99 3029 UI - 12252 AU - Godoy S AU - Fujita S AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoSUNY Buffalo, Dept Phys, Buffalo, NY 14260, USAGodoy, S, Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Three-dimensional transmission coefficients for neutrons and photons in amorphous materials AB - We use Boltzmann's transport equation to calculate the 3D incoherent Landauer equation for neutrons and photons diffusing in a slab of amorphous material. We use the P-1 approximation to calculate the multiple-scattering transmission coefficient as a function of the diffusion coefficient. The 3D transmission coefficient obtained is smaller than the 1D case. The P-1 result, valid only for thick slabs, is proved to be an excellent approximation to the exact solution. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000172536000036 L2 - DIFFUSION; RESISTANCE SO - Journal of Chemical Physics 2001 ;115(23):10892-10896 3030 UI - 13477 AU - Goff F AU - Love SP AU - Warren RG AU - Counce D AU - Obenholzner J AU - Siebe C AU - Schmidt SC AD - Univ Calif Los Alamos Natl Lab, Geol Geochem Grp, Los Alamos, NM 87545, USAUniv Calif Los Alamos Natl Lab, Los Alamos, NM 87545, USANat Hist Museum, Dept Mineral, Vienna, AustriaNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoGoff, F, Univ Calif Los Alamos Natl Lab, Geol Geochem Grp, EES-1,MS D462, Los Alamos, NM 87545 USA TI - Passive infrared remote sensing evidence for large, intermittent CO2 emissions at Popocatepetl volcano, Mexico AB - Passive infrared (FTIR) and correlation spectrometer (COSPEC) measurements were conducted at Popocatepetl volcano during February 10 to 26. 1998 from sites 4 to 17 km distant from the summit. Volcano behavior was relatively quiet and SO2 flux averaged 1670 +/- 1420 t/day (51 measurements). relatively small for Popocatepetl. Concurrent HCl/SO2 and HF/SO2 ratios were 0.17 +/- 0.1 and 0.031 +/- 0.003, respectively, about the same as ratios measured from 1994 to 1997. The amount of CO2 in the volcanic plume was quantified using FASCODE in which atmospheric CO2 is numerically subtracted from the total infrared spectrum to obtain the residual magmatic CO2. Surprisingly, CO2/SO2 mass ratios rose dramatically to values as high as 140, about 30 times higher than typical values of 2 to 8 measured from 1994 to 1996. These excursions in high CO2/SO2 ratios were short-lived, lasting no longer than about 0.5 to 3.0 h but CO2 flux occasionally exceeded 100,000 t/day. We estimate that the average CO2/SO2 ratio for the period was about 23, yielding an average CO2 flux of roughly 38,000 t/day. Chemical and petrographic analyses of lava and pumice erupted during explosions on June 30, 1997 and January 1, 1998 show conclusively that Popocatepetl produces mixed products formed by injection of mafic magma into a more silicic chamber at temperatures and pressures of roughly 1040 degreesC and 5 kbar. In addition. Popocatepetl eruptive products include xenoliths of metamorphosed carbonate rocks containing wollastonite and other calc-silicate minerals indicating reaction of magma with Cretaceous limestone underlying the volcano. Using a normal CO2/SO2 ratio of 4 for reference. we calculate an average excess CO2 production of 32,000 t/day for 17 days. This would require assimilation of only 5 x 10(-4) km(3) of limestone, an amount easily accessible in the 3-km-thick Cretaceous section beneath the volcano. We also examine two scenarios in which excess CO2 is produced by degassing of subjacent basalt magma, but these explanations seem less plausible to us. Because many other Volcanoes are underlain by carbonate sequences, short-duration bursts of CO2 flux, and increased CO2/SO2 ratio, might be observed at other sites, if simultaneous, real-time measurements of major gas species are made. Published by Elsevier Science B.V MH - Austria MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000169307500010 L2 - CO2;FTIR;COSPEC;Popocatepetl volcano;assimilation;magma mixing;SPECTRAL RADIOMETER; GAS; SPECTROSCOPY; CALIFORNIA; DACITE; PLUMES; ROCKS; SO2; GEOBAROMETER; HORNBLENDE SO - Chemical Geology 2001 ;177(1-2):133-156 3031 UI - 13584 AU - Goguitchaichvili A AU - Camps P AU - Urrutia-Fucugauchi J AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Montpellier 2, F-34095 Montpellier, FranceCNRS, Lab Geophys Tecton & Sedimentol, F-34095 Montpellier, FranceGoguitchaichvili, A, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - On the features of the geodynamo following reversals or excursions: by absolute geomagnetic paleointensity data AB - We carried out a Thellier paleointensity study of a similar to3.6 million year Pliocene geomagnetic excursion recorded in a lava flow succession from southern Georgia (lesser Caucasus). Previous paleomagnetic study [Phys. Earth Planet. Int. 96 (1996) 41] revealed that several consecutive lava flows record an intermediate polarity direction at the base of the section followed by a thick reverse polarity zone. Samples of 71 from 26 hows from both polarity zones were pre-selected for paleointensity experiments because of their low viscosity index, stable remanent magnetisation and close to reversible continuous thermomagnetic curves. Altogether 54 samples from 21 hows yielded reliable paleointensity estimates. The mean paleointensity of the intermediate field is 7.8 +/- 2.4 muT (three flows). The stable polarity paleointensity is higher with a mean 24.2 +/- 8.2 muT (15 flows), which corresponds to a mean virtual dipole moment (VDM) of 4.6 +/- 1.8 x 10(22) Am-2. This value is significantly lower than the average Pliocene geomagnetic dipole moment and post-intermediate dipole moments recorded in volcanic sequences at Hawaii (similar to4 Ma) and Steens mountain (similar to 16.2 Ma). However, our results are quite similar to the post-intermediate field recorded in Iceland during the Gauss-Matuyama reversal. These results suggest that the regime of the geodynamo following reversals or excursions may vary significantly from one case to the next without any apparent systematic features. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000168923000007 L2 - paleointensity;geomagnetic excursion;geodynamo;lesser caucasus;pliocene;PALEOSECULAR VARIATION; LESSER CAUCASUS; LAVA FLOWS; FIELD; TRANSITION; INTENSITY; SEQUENCE; RECORDS; ISLANDS; SECTION SO - Physics of the Earth and Planetary Interiors 2001 ;124(1-2):81-93 3032 UI - 12756 AU - Golubev VG AU - Dukin AA AU - Medvedev AV AU - Pevtsov AB AU - Sel'kin AV AU - Feoktistov NA AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaBUAP, Inst Ciencias, Ctr Invest Disposit Semicond, Puebla 72570, MexicoGolubev, VG, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - Fabry-Perot a-Si : H/a-SiOx : H microcavities with an erbium-doped a-Si : H active layer AB - Fabry-Perot microcavities tuned to a wavelength of 1.5 mum have been fabricated by means of plasma-enhanced chemical-vapor deposition on the basis of a-Si:H and a-SiOx:H. Distributed Bragg reflectors (DBRs) and the active layer were grown in a single technological cycle. The half-wave active layer was doped with erbium in the course of growth from a metal-organic compound. The high optical contrast enabled a high microcavity quality factor (Q = 355) with only three DBR periods. The intensity of erbium photoluminescence (PL) from the microcavity is two orders of magnitude higher than that of erbium emission from an identical a-Si:H layer without DBR. Transmission, reflection, and PL spectra are analyzed. It is found that the spectral shape of the line of erbium PL (transition I-4(13/2) --> I-4(15/2)) from the microcavity virtually coincides with the shape of the resonance peak of its transmission spectrum. Theoretical calculations have been performed providing a comprehensive description of the observed experimental spectra. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7826 UR - ISI:000171138700022 L2 - HYDROGENATED AMORPHOUS-SILICON; I-N STRUCTURES; SPONTANEOUS EMISSION; PHOTOLUMINESCENCE; ELECTROLUMINESCENCE; FILMS; ER3+ SO - Semiconductors 2001 ;35(10):1213-1221 3033 UI - 14461 AU - Gomez-Duarte OG AU - Pasetti MF AU - Santiago A AU - Sztein MB AU - Hoffman SL AU - Levine MM AD - Univ Maryland, Sch Med, Dept Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAUniv Nacl Autonoma Mexico, Inst Ciencias Biomed, Mexico City 04510, DF, MexicoUSN, Malaria Program, Med Res Ctr, Rockville, MD 20852, USALevine, MM, Univ Maryland, Sch Med, Dept Med, Ctr Vaccine Dev, 685 W Baltimore St,Room 480, Baltimore, MD 21201 USA TI - Expression, extracellular secretion, and immunogenicity of the Plasmodium falciparum sporozoite surface protein 2 in Salmonella vaccine strains AB - Deleting transmembrane alpha -helix motifs from Plasmodium falciparum sporozoite surface protein (SSP-2) allowed its secretion from Salmonella enterica serovar Typhimurium SL3261 and S. enterica serovar Typhi CVD 908-htrA by the Hly type I secretion system. In mice immunized intranasally, serovar Typhimurium constructs secreting SSP-2 stimulated greater gamma interferon splenocyte responses than did nonsecreting constructs (P = 0.04) MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000166528700073 L2 - CD8(+) T-CELLS; ANTIBODY-RESPONSES; INTERFERON-GAMMA; FOREIGN ANTIGENS; DIPHTHERIA-TOXIN; CVD 908-HTRA; FRAGMENT-C; MALARIA; PROTECTION; INDUCTION SO - Infection and Immunity 2001 ;69(2):1192-1198 3034 UI - 13705 AU - Gomez-Flores R AU - Rice KC AU - Zhang XY AU - Weber RJ AD - Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Sect Med Sci, Peoria, IL 61656, USANIDDK, Med Chem Lab, NIH, Bethesda, MD 20892, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, San Nicolas De Los Garza 66451, NL, MexicoWeber, RJ, Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Sect Med Sci, 1 Illini Dr,Box 1649, Peoria, IL 61656 USA TI - Increased tumor necrosis factor-alpha and nitric oxide production by rat macrophages following in vitro stimulation and intravenous administration of the delta-opioid agonist SNC 80 AB - Opioids alter immune function by binding to opioid receptors on cells of the immune system, or indirectly by acting on receptors within the central nervous system. Mu-selective opioid agonists are generally associated with immunosuppression, whereas delta -opioid receptor-selective agonists are commonly associated with immunopotentiation. We have previously shown that intracerebroventricular administration of the nonpeptide delta -opioid receptor agonist (+)-4-((alpha R)-alpha-((2S, 5R)-4-allyl-2, 5-dimethyl-1-piperazinyl)-3-methoxybenzyl)-N, N-diethyl-benzamide (SNC 80) did not alter certain parameters of immunocompetence. In the present study, we studied the in vitro and ex vivo effects of SNC 80 on rat macrophage and lymphocyte functions. We showed that SNC 80 at concentrations of 10(-7) M and 10(-6) M, significantly (P < 0.01) stimulated the in vitro production of tumor necrosis factor-alpha (TNF-alpha) (60-100% increase) and nitric oxide (34-67% increase) by resident and LPS-stimulated peritoneal macrophages. Similarly, intravenous administration of SNC 80 (6.8 mg/kg) significantly (P < 0.01) increased the production of TNF- and nitric oxide (2- and 15-fold increases respectively, compared with saline-injected control) by LPS-stimulated splenic macrophages. In addition, intravenous injection of SNC 80 plus Con A potentiated ex vivo LPS-stimulated macrophage functions. SNC 80 could potentially be utilized in various clinical situations where immunosuppression is undesirable. (C) 2001 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000168709300004 L2 - SNC 80;non-peptide opioids;delta-opioid agonist;macrophages;nitric oxide;tumor necrosis factor-alpha;MURINE PERITONEAL-MACROPHAGES; MYCOBACTERIUM-AVIUM COMPLEX; NATURAL-KILLER; PERIAQUEDUCTAL GRAY; RECEPTOR AGONIST; IMMUNE FUNCTIONS; IFN-GAMMA; TNF-ALPHA; IN-VITRO; T-CELLS SO - Life Sciences 2001 ;68(24):2675-2684 3035 UI - 12127 AU - Gomez A AU - Reguera E AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaCICATA, IPN, Ctr Appl Sci & Adv Technol IPN, Mexico City 10500, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, Havana 10400, Cuba TI - The structure of three cadmium hexacyanometallates(II): Cd-2[Fe(CN)(6)]center dot 8H(2)O, Cd-2[Ru(CN)(6)]center dot 8H(2)O and Cd-2[Os(CN)(6)]center dot 8H(2)O AB - Cd-2[M-ii(Cn)(6)]. 8H(2)O, where m = fe, ru and os, form a family of isomorphous compounds which crystallize in the monoclinic p2(1)/N space group. M-ii cations present their usual octahedral coordination, while the cadmium atom coordinates to three nitrogen atoms from the cyanide groups and three water molecules forming a distorted octahedron. The rest of the water molecules are located in small channels in the structure and are hydrogen bonded to the coordinated ones. Adjacent cadmium octahedra share one edge to form the moiety: Cd2n6(H2o)(4), In such a way that two metal sequences are observed: M-ii-cd-m-ii and m-ii-cd-cd-m-ii, forming a tridimensional network. Coordinated and zeolitic water molecules can be removed preserving the m-c dropn-cd framework. (C) 2001 Published by elsevier science ltd MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Inorganic & Nuclear;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1466-6049 UR - ISI:000172827300065 L2 - X-ray diffraction;Mossbauer spectroscopy;infrared spectroscopy;Raman spectroscopy;WATER; FERRICYANIDE; CRYSTAL SO - International Journal of Inorganic Materials 2001 ;3(7):1045-1051 3036 UI - 12715 AU - Gomez A AU - Bialostozky D AU - Zajarias A AU - Santos E AU - Palomar A AU - Martinez ML AU - Sandoval J AD - Inst Nacl Cardiol Ignacio Chavez, Cardiopulm Dept, Mexico City, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Nucl Cardiol, Mexico City, DF, MexicoZajarias, A, Med Clin S, 90-21-342,4950 Childrens Pl, St Louis, MO 63110 USA TI - Right ventricular ischemia in patients with primary pulmonary hypertension AB - OBJECTIVES The goal of this study was to determine whether right ventricular (RV) ischemia is a contributory factor in the development of RV dysfunction in patients with primary pulmonary hypertension (PPH). BACKGROUND Patients with advanced PPH develop RV dysfunction, characterized by a decreased cardiac output, increased right atrial pressure (RAP) and/or elevated RV end-diastolic pressure, which progresses to heart failure and death. The cause of this dysfunction is unknown. Right ventricular ischemia may play a role in its development. METHODS From 1992 to 1999, a prospective study involving 23 patients with PPH at the Instituto Nacional de Cardiologia "Ignacio Chavez" (Mexico City, Mexico) was undertaken. These patients were evaluated clinically and further studied by echocardiography, right heart catheterization and stress myocardial scintigraphy using technetium 99m sestamibi. RESULTS Nine patients of 23 were found to have scintigraphic images consistent with RV ischemia. Significant correlation was found between RV ischemia obtained through myocardial perfusion scintigraphy and elevation of RV end-diastolic pressure (p < 0.001), elevation of RAP (p < 0.037) and a decrease in mixed venous oxygen saturation (p < 0.0001). No other clinical or hemodynamic variables showed a significant correlation with RV ischemia. CONCLUSIONS A direct correlation exists between RV ischemia, as determined by myocardial scintigraphy, and hemodynamic alterations suggestive of RV dysfunction in patients with PPH. (C) 2001 by the American College of Cardiology MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 17 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0735-1097 UR - ISI:000171244500035 L2 - SHORT-TERM; SPECT; DYSFUNCTION; PERFUSION; SURVIVAL; ETIOLOGY; FAILURE SO - Journal of the American College of Cardiology 2001 ;38(4):1137-1142 3037 UI - 14170 AU - Gomez A AU - Reguera E AU - Cranswick LMD AD - Ctr Appl Sci & Adv Technol, IPN, Mexico City 11500, DF, MexicoSERC, Daresbury Lab, Synchrotron Radiat Dept, CCP14, Warrington WA4 4AD, Cheshire, EnglandUniv La Habana, IMRE, Lab Anal Estructural, La Habana 10400, CubaReguera, E, Ctr Appl Sci & Adv Technol, IPN, Legaria 694, Mexico City 11500, DF, Mexico TI - The structure of two orthorhombic nitroprussides: Cd[Fe(CN)(5)NO]center dot 2H(2)O and Zn[Fe(CN)(5)NO]center dot 2H(2)O AB - When zinc and cadmium nitroprussides, obtained as powders or single-crystals samples, are aged in air they lose crystallization water and change their crystalline structure. In the stable form these two complexes are orthorhombic dihydrates with four molecules in the unit cell. In the aging process the crystals become brittle producing a polycrystalline material. The crystalline structure of these two complexes (orthorhombic dihydrates) was refined from their XRD powder patterns using the Rietveld method. As the starting model in the refining process the reported orthorhombic structure of copper nitroprusside (dihydrate) was used. The main changes in the dehydration process associated with the structural transformation take place in the coordination sphere of the outer cation (Cd or Zn). (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000167240700002 L2 - nitroprusside;Rietveld method;crystal structure;powder diffraction;Mossbauer spectra;pentacyanide;CRYSTAL-STRUCTURE ANALYSIS; SPECTRA SO - Polyhedron 2001 ;20(3-4):165-170 3038 UI - 13118 AU - Gomez I AU - Oltean DI AU - Gill SS AU - Bravo A AU - Soberon M AD - Univ Nacl Autonoma Mexico, Dept Mol Microbiol, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Calif Riverside, Dept Neurosci & Cell Biol, Riverside, CA 92521, USASoberon, M, Univ Nacl Autonoma Mexico, Dept Mol Microbiol, Inst Biotecnol, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Mapping the epitope in cadherin-like receptors involved in Bacillus thuringiensis Cry1A toxin interaction using phage display AB - In susceptible lepidopteran insects, aminopeptidase N and cadherin-like proteins are the putative receptors for Bacillus thuringiensis (Bt) toxins. Using phage display, we identified a key epitope that is involved in toxin-receptor interaction. Three different scFv molecules that bind Cry1Ab toxin were obtained, and these scFv proteins have different amino acid sequences in the complementary determinant region 3 (CDR3). Binding analysis of these scFv molecules to different members of the Cry1A toxin family and to Escherichia coli clones expressing different Cry1A toxin domains showed that the three selected scFv molecules recognized only domain 11. Heterologous binding competition of Cry1Ab toxin to midgut membrane vesicles from susceptible Manduca sexta larvae using the selected scFv molecules showed that scFv73 competed with Cry1Ab binding to the receptor. The calculated binding affinities (Kd) of scFv73 to Cry1Aa, Cry1Ab, and Cry1Ac toxins are in the range of 20-51 nm. Sequence analysis showed this scFv73 molecule has a CDR3 significantly homologous to a region present in the cadherin-like protein from M. sexta (Bt-R-1), Bombyx mori (Bt-R-175), and Lymantria dispar. We demonstrated that peptides of 8 amino acids corresponding to the CDR3 from scFv73 or to the corresponding regions of Bt-R-1 or Bt-R-175 are also able to compete with the binding of Cry1Ab and Cry1Aa toxins to the Bt-R-1 or Bt-R-175 receptors. Finally, we showed that synthetic peptides homologous to Bt-R-1 and scFv73 CDR3 and the scFv73 antibody decreased the in vivo toxicity of Cry1Ab to M. sexta larvae. These results show that we have identified the amino acid region of Bt-Ri and Bt-R-175 involved in Cry1A toxin interaction MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 36 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000170346000037 L2 - BRUSH-BORDER MEMBRANE; CRYIA(C) DELTA-ENDOTOXIN; BY-PASSING IMMUNIZATION; PLANAR LIPID BILAYERS; AMINOPEPTIDASE-N; MANDUCA-SEXTA; INSECTICIDAL TOXIN; CRYSTAL PROTEINS; BOMBYX-MORI; PLUTELLA-XYLOSTELLA SO - Journal of Biological Chemistry 2001 ;276(31):28906-28912 3039 UI - 12765 AU - Gomez L AU - Chayet A AD - CODET Eye Inst, Tijuana, BC, MexicoUniv Calif San Diego, Dept Ophthalmol, La Jolla, CA 92093, USAGomez, L, 4752 Vista de la Tierra, Del Mar, CA 92014, USA TI - Laser in situ keratomileusis results after intrastromal corneal ring segments (Intacs) AB - Objective: To evaluate the safety and efficacy of laser in situ keratomileusis (LASIK) after removal of intrastromal corneal ring segments (Intacs, KeraVision, Fremont, CA) from the cornea. Design: Single-center, noncomparative, interventional, consecutive case series. Participants: Nine eyes of nine consecutive patients who had undergone LASIK after Intacs of experimental design removal were analyzed for this study. Intervention: A standard LASIK procedure was performed with the Nidek EC 5000 excimer laser (Nidek, Gamagori, Japan) at intervals between 4 and 10 months after Intacs explantation. A Nidek MK 2000 microkeratome (Nidek, Gamagori, Japan) or a Chiron Automated Corneal Shaper (Bausch & Lomb, Claremont, CA) with a 130- to 180-mum thickness plate was used to create a nasal hinged flap in a plane superficial to the previous Intacs channel. Main Outcome Measures: Uncorrected visual acuity, manifest refraction, best spectacle-corrected visual acuity, and topography were measured preoperatively and at months 1, 3, 6, and 12 after LASIK Results: Faint residual scarring in the channels after Intacs removal was seen in all patients. No difficulties were encountered during the ablation or flap replacement. Eight of nine patients had 20/20 or better uncorrected visual acuity after a single LASIK procedure. Mean spherical equivalent at 12 months was -0.6, ranging from - 1.25 to + 0.25 diopter. One patient had glare develop secondary to superior corneal thinning and scarring after implantation of a nonstandard Intacs. No patient lost lines of best spectacle-corrected vision after LASIK Conclusion: Reversibility of the myopic Intacs is demonstrated. Removal of Intacs may be followed by a safe and effective LASIK for low to moderate myopia. Ophthalmology 2001;108:1738-1743 (C) 2001 by the American Academy of Ophthalmology MH - Mexico|Baja California MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Article AV - English IS - 0161-6420 UR - ISI:000171205800021 L2 - MYOPIA; DIOPTERS; EYES SO - Ophthalmology 2001 ;108(10):1738-1743 3040 UI - 9504 AU - Gomez M AU - Gelbukh A AU - Lopez-Lopez A AU - BaezaYates R AD - IPN, CIC, Mexico City 07738, DF, MexicoINAOE, Mexico City, DF, MexicoUniv Chile, Dept Ciencias Computac, Santiago, ChileMontes-y-Gomez, M, IPN, CIC, Mexico City 07738, DF, Mexico TI - Flexible comparison of conceptual graphs AB - Conceptual graphs allow for powerful and computationally affordable representation of the semantic contents of natural language texts. We propose a method: of comparison (approximate matching) of conceptual graphs. The method takes into account synonymy and subtype/supertype relationships between the concepts and relations used in the conceptual graphs, thus allowing for greater flexibility of approximate matching. The method also allows the user to choose the desirable aspect of similarity in the cases when the two graphs can be generalized in different ways. The algorithm and examples of its application are presented. The results are potentially useful in a range of tasks requiring approximate semantic or another structural matching - among them, information retrieval and text mining MH - Chile MH - Mexico|Puebla PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000179961300011 SO - Database and Expert Systems Applications 2001 ;2113():102-111 3041 UI - 13153 AU - Gomez S AU - Gosselin O AU - Barker JW AD - Natl Autonomous Univ Mexico, Inst Appl Math & Syst, Mexico City, DF, MexicoTotalFinaElf Explorat, London, EnglandGomez, S, Natl Autonomous Univ Mexico, Inst Appl Math & Syst, Mexico City, DF, Mexico TI - Gradient-based history matching with a global optimization method AB - We investigate the application of a global optimization algorithm called the tunneling method to the problem of history matching of petroleum reservoirs. Results are presented for two test cases. The first is a small synthetic case in which the global minimum is known. The second is a real field example. In both cases, a series of minima was found. The computational cost of each tunneling phase is found to be comparable with the cost of each local minimization. It is concluded that the tunneling method may have a practical application in history matching as an alternative to immediate reformulation of the problem if the first minimum found does not represent an acceptable match MH - United Kingdom MH - Mexico|Distrito Federal PB - RICHARDSON: SOC PETROLEUM ENG RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Petroleum U5 - J;Article AV - English IS - 1086-055X UR - ISI:000170133900010 SO - Spe Journal 2001 ;6(2):200-208 3042 UI - 13785 AU - Gomez S AU - Seifried S AD - Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82040, Sinaloa, MexicoLimburgs Univ Ctr, Dept SBG, Res Grp Zool, B-3610 Diepenbeek, BelgiumUniv Oldenburg, FB AG Zoosyst & Morphol 7, D-26111 Oldenburg, GermanyGomez, S, Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Joel Montes Camarena S-N,Ap Postal 811, Mazatlan 82040, Sinaloa, Mexico TI - A new species of Ectinosoma boeck, 1865 (Copepoda : Harpacticoida : Ectinosomatidae) from northwestern Mexico AB - A new species of harpacticoid copepod, Ectinosoma mexicanum (Harpacticoida: Ectinosomatidae), is described from a coastal lagoon in northwestern Mexico (Sinaloa state). Ectinosoma mexicanum appears to be allied to E. porosum (Wells, 1967) by sharing a robust endopod on P2 and P4 and a strong setae on the first and second endopodal segment of P2 and P4. The new Mexican ectinosomatid also has the seta next to the outermost seta of exopod of P5 barely longer than the exopod inner edge as in E. porosum and E. mediterraneum Kunz, 1975 MH - Belgium MH - Germany MH - Mexico|Sinaloa PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 1 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000168465000018 SO - Proceedings of the Biological Society of Washington 2001 ;114(1):207-218 3043 UI - 13787 AU - Gomez S AD - Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82040, Sinaloa, MexicoLimburgs Univ Ctr, Dept SBG, Res Grp Zool, B-3610 Diepenbeek, BelgiumGomez, S, Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Joel Montes Camarena S-N,Ap Postal 811, Mazatlan 82040, Sinaloa, Mexico TI - A new species of Onychocamptus Daday, 1903 (Copepoda : Harpacticoida : Laophontidae) from northwestern Mexico AB - A new species of harpacticoid copepod, Onychocamptus fratrisaustralis (Harpacticoida: Laophontidae), is described from a coastal lagoon in northwestern Mexico (Sinaloa state). Onychocamptus fratrisaustralis appears to be related to O. krusensterni Schizas & Shirley, 1994, by the unusual formula of the P4 exopod. Onychocamptus anomalus (Ranga Reddy, 1984) shares the same formula of the P4 exopod, but differs from O. fratrisaustralis and O. krusensterni in the A2 exopod (with 4 setae in O. krusensterni and O. fratrisaustralis; with 1 seta in O. anomalus) and female P5 exopod (with four setae in O. anomalus; with three setae in O. krusensterni and O. fratrisaustralis). Onychocamptus besnardi Jakobi, 1954, also possesses a P4 exopod with two outer spines, but lacks the inner seta of the same segment. After thorough analysis of the type material of O. krusensterni (USNM259322), a number of subtle differences was found between this species and O. fratrisaustralis: armature of the antennal exopod, length/width ratio of caudal rami, dorsal ornamentation of the genital double-somite and fourth urosomite, relative length of the inner setae of second and third exopodal segments and the two innermost setae of second endopodal segments of P2-P3, relative length of the second endopodal segment of P4, general morphology of baseoendopod and relative length of the proximal setae of the endopodal lobe of P5, and relative length of the lateral outer seta of the last antennular segment MH - Belgium MH - Mexico|Sinaloa PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 1 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000168465000022 L2 - LAGOON SO - Proceedings of the Biological Society of Washington 2001 ;114(1):262-274 3044 UI - 14258 AU - Goncalves LL AU - de Haro ML AU - Taguena-Martinez J AD - Univ Fed Ceara, Dept Fis, BR-60451970 Fortaleza, Ceara, BrazilUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoGoncalves, LL, Univ Fed Ceara, Dept Fis, Campus Pici,Caixa Postal 6030, BR-60451970 Fortaleza, Ceara, Brazil TI - Relaxation in kinetic models on alternating linear chains AB - A restricted dynamics, previously introduced in a kinetic model for relaxation phenomena in linear polymer chains, is used to study the dynamic critical exponent of one-dimensional Ising models. Both an alternating isotopic chain and an alternating-bond chain are considered. In contrast with what occurs for Glauber dynamics, in these two models the dynamic critical exponent turns out to be the same. The alternating isotopic chain with the restricted dynamics is shown to lead to Nagel scaling for temperatures above some critical value. Further support is given relating the Nagel scaling to the existence of multiple (simultaneous) relaxation processes, the dynamics apparently not playing the most important role in determining such scaling MH - Brazil MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000167022500023 L2 - NONUNIVERSAL CRITICAL-DYNAMICS; ISING-MODEL; SUPERCOOLED LIQUIDS; POLYMER-CHAINS; UNIVERSALITY SO - Physical Review e 2001 ;63(2): 3045 UI - 13801 AU - Gonsalves KE AU - Li H AU - Santiago P AD - Univ Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06268, USAUniv Connecticut, Dept Chem, Storrs, CT 06268, USAININ, Dept Mat Sci, Toluca, MexicoGonsalves, KE, Univ Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06268 USA TI - Synthesis of acicular iron oxide nanoparticles and their dispersion in a polymer matrix AB - An alternative forced hydrolysis approach for the synthesis of beta -FeOOH of varying dimensions was achieved. The beta -FeOOH particles were converted into gamma -Fe2O3 in a colloidal process, which eliminated the agglomeration of gamma -Fe2O3 particles. The acicular gamma -Fe2O3 nanoparticles could be readily dispersed into an organic solvent. Preliminary studies have demonstrated that the dispersion of the gamma -Fe2O3 nanorods in a polymer matrix is feasible leading to an organic-inorganic nanocomposite. (C) 2001 Kluwer Academic Publishers MH - USA MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000168465300011 L2 - PARTICLES SO - Journal of Materials Science 2001 ;36(10):2461-2471 3046 UI - 12786 AU - Gonzalez-Aguilar GA AU - Wang CY AU - Buta JG AU - Krizek DT AD - ARS, Hort Crops Qual Lab, Beltsville Agr Res Ctr, USDA, Beltsville, MD 20705, USAAC Direcc Tecnol Alimentos Origen Vegetal, Ctr Invest Alimentac & Deserrollo, Hermosillo 83000, Sonora, MexicoARS, Climate Stress Lab, Nat Resources Inst, USDA, Beltsville, MD 20705, USAWang, CY, ARS, Hort Crops Qual Lab, Beltsville Agr Res Ctr, USDA, Beltsville, MD 20705 USA TI - Use of UV-C irradiation to prevent decay and maintain postharvest quality of ripe 'Tommy Atkins' mangoes AB - Ripe mangoes 'Tommy Atkins' were exposed to UV-C irradiation for 10 and 20 min, prior to storage for 14 days at 5 or 20 degreesC and a shelf-life period of 7 days at 20 degreesC. UV-C-treated fruit maintained better visual appearance than unirradiated controls. UV-C irradiation for 10 min was the most effective regime in suppressing decay symptoms and maintaining firmness during storage at 5 or 20 degreesC. Such fruit (treated with UV-C for 10 min) showed greater levels of putrescine and spermidine after cold storage than controls and those treated with UV-C for 20 min. Higher levels of sugars and lower levels of organic acids were observed in mangoes treated with UV-C for 20 min. However, the most effective UV-C treatment (10 min) for reducing decay maintained sugar and organic acid levels similar to the controls. No UV-damage was observed on treated fruits after storage. These results indicate that UV-C irradiation could be used as an effective and rapid method to preserve the postharvest life of ripe mangoes without adversely affecting certain quality attributes MH - USA MH - Mexico|Sonora PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0950-5423 UR - ISI:000171285600007 L2 - Mangifera indica;organic acids;overall quality;polyamines;sugars;UV-C treatment;INDUCED RESISTANCE; FRUITS; LIGHT; ACCUMULATION; TEMPERATURES; POLYAMINES; DISEASES SO - International Journal of Food Science and Technology 2001 ;36(7):767-773 3047 UI - 12824 AU - Gonzalez-Aguilar GA AU - Buta JG AU - Wang CY AD - USDA ARS, Hort Crops Qual Lab, Beltsville, MD 20705, USACtr Invest Alimentac & Desarrolo, Direcc Tecnol Alimentos Origen Vegetal, AC, Hermosillo 83000, Sonora, MexicoWang, CY, USDA ARS, Hort Crops Qual Lab, 10300 Baltimore Ave, Beltsville, MD 20705 USA TI - Methyl jasmonate reduces chilling injury symptoms and enhances colour development of 'Kent' mangoes AB - Treatment of mango (Mangifera indica cv 'Kent') fruits with methyl jasmonate (MJ) vapour for 20h at 20 degreesC reduced chilling injury (CI) symptoms and enhanced skin colour development. Ali at 10(-4)M was the most effective concentration for reducing CI and decay in fruits stored at 5 degreesC followed by 7 days at 20 degreesC (shelf-life period). The use of 10(-5)M Mi enhanced yellow and red colour development of mangoes stored at 20 degreesC. These fruits possessed higher L*, a* and b* values than untreated fruits and those treated with 10(-4)M Mi. Ripening processes were inhibited by cold storage (5 degreesC) in control fruits. After cold storage and shelf-fife period, fruits treated with 10(-5)M MJ ripened normally and contained the highest total soluble solids (TSS). These fruits also maintained higher sugar and organic acid levels than fruits subjected to other treatments. We concluded that MJ treatment could be used to reduce decay and Cl symptoms and also to improve colour development of mango fruits without adversely affecting quality. (C) 2001 Society of Chemical Industry MH - USA MH - Mexico|Sonora PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 13 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000171100900005 L2 - methyl jasmonate;Mangifera indica;sugars;organic acids;chilling injury;decay;ACID; IDENTIFICATION; GRAPEFRUIT; ETHYLENE; QUALITY; STORAGE; DECAY; FRUIT SO - Journal of the Science of Food and Agriculture 2001 ;81(13):1244-1249 3048 UI - 13165 AU - Gonzalez-Aguilar GA AU - Wang CY AU - Buta JG AD - USDA ARS, Hort Crops Qual Lab, Beltsville, MD 20705, USACtr Invest Alimentac & Desarrollo AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoWang, CY, USDA ARS, Hort Crops Qual Lab, 10300 Baltimore Ave, Beltsville, MD 20705 USA TI - Inhibition of browning and decay of fresh-cut radishes by natural compounds and their derivatives AB - Treatments with inhibitors of enzymatic activity or microbial growth to retard browning and decay of fresh-cut radish slices were evaluated. Slices were dipped in solutions of natural products and their derivatives, 4-hexylresorcinol, isoascorbic acid, N-acetylcysteine and potassium sorbate alone or in combination prior to storage in air for up to 14 days at 10 degreesC Inhibition of browning and deterioration without affecting texture of slices was achieved during 14 days, in cold storage. From the different solutions evaluated, the combination of 4-hexylresorcinol (0.001 g/L), potassium sorbate (0.05 g/L) and N-acetylcysteine (0.025 g/L) was most effective in preventing browning and deterioration of radish slices for zip to 18 days at 10 degreesC MH - USA MH - Mexico|Sonora PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 5 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0023-6438 UR - ISI:000170155300009 L2 - radish;fresh-cut;N-acetylcysteine;potassium sorbate;4-hexylresorcinol;isoascorbic acid;PRODUCTS; PEARS SO - Lebensmittel-Wissenschaft Und-Technologie-Food Science and Technology 2001 ;34(5):324-328 3049 UI - 13558 AU - Gonzalez-Aguilera V AU - Munoz-Porras JM AU - Zamora AG AD - Univ Tecn Federico Santa Maria, Dept Matemat, Valparaiso, ChileUniv Salamanca, Dept Matemat, Salamanca, SpainUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoGonzalez-Aguilera, V, Univ Tecn Federico Santa Maria, Dept Matemat, Casilla 110-V, Valparaiso, Chile TI - On the irreducible components of the singular locus of A(g) MH - Chile MH - Mexico|Michoacan MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000169038200013 SO - Journal of Algebra 2001 ;240(1):230-250 3050 UI - 13466 AU - Gonzalez-Alanis P AU - Wright GM AU - Johnson SC AU - Burka JF AD - Univ Prince Edward Isl, Atlantic Vet Coll, Dept Anat & Physiol, Charlottetown, PE C1A 4P3, CanadaGonzalez-Alanis, P, Univ Autonoma Tamaulipas, Fac Med Vet & Zootecnia, Dr Norberto Trevino Zapata,Carretera Victoria Man, Ciudad Victoria 87000, Tamaulipas, Mexico TI - Frontal filament morphogenesis in the salmon louse Lepeophtheirus salmonis AB - The objective of the present study was to understand how and when the frontal filament (FF) in the salmon louse Lepeophtheirus salmonis is produced by examining the sequence of morphological changes leading to FF production in the copepodid and early chalimus stages. Atlantic salmon (Salmo salar) were heavily infested with newly molted copepodids. Sea lice were sampled prior to infestation and at 1, 2, 3, 4, 5, 6, 7, 8, and 9 days postinfestation. FF morphogenesis from newly molted copepodid to chalimus II, i.e., through 2 molts, was studied using high-resolution light microscopy of serial transverse and sagittal resin sections. Three groups of cells, identified as A, B, and C, are thought to be involved in the production of the secretions (S1 and S2) that form the filament material. The amount and shape of S1 and S2 and their association with B- and C-group cells, respectively, changed with the molt cycle. The following scenario for FF development is proposed: the first secretion to form after the molt for both copepodid and chalimus stages is S1, and it is formed by B-group cells and becomes the basal plate of the external FE C-group cells produce S2 during mid-intermolt to premolt stage. The S2 becomes the stem of the external FE In premolt larvae, S1 and S2 were contained within a cuticle-lined invagination that had a form similar to that of the extruded filament. The axial duct present in both copepodid and chalimus originates from the A-group cells and probably carries a secretion used to attach the filament to the host. This study provides strong evidence that L. salmonis produces a new filament with each molt, creating the possibility of using a sea lice control method based on interference with filament production more feasible MH - Canada MH - Mexico|Tamaulipas PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000169392000013 L2 - DEVELOPMENTAL STAGES; COPEPODA; CALIGIDAE SO - Journal of Parasitology 2001 ;87(3):561-574 3051 UI - 12581 AU - Gonzalez-Amezcua O AU - Hernandez-Contreras M AU - Pincus P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAGonzalez-Amezcua, O, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Electrostatic correlation force of discretely charged membranes AB - The total force between two like charged surfaces is investigated as a function of counterion concentration in aqueous solution and surfaces distance of separation. A smooth and a discrete density of surface charge sigma (s) lead to differences in the force distance curve at high sigma (s), which are negligible for low surface charge, The total force per unit area with divalent counterions is an oscillating function of sigma (s). At fixed surfaces separation and region of attraction (increasing sigma (s)), there is a variation in its strength that results from a competition between the ideal kinetic and ion-ion correlation force components as predicted from the anisotropic hypernetted chain approximation MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171649000038 L2 - MONTE-CARLO; FLUCTUATIONS; SURFACES; ADHESION; IONS SO - Physical Review e 2001 ;6404(4): 3052 UI - 12938 AU - Gonzalez-Ceron L AU - Rodriguez MH AU - Santillan F AU - Chavez B AU - Nettel JA AU - Hernandez-Avila JE AU - Kain KC AD - Inst Nacl Salud Publ, Ctr Invest Paludismo, Tapachula 30700, Chiapas, MexicoInst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoInst Nacl Salud Publ, Dept Informat, Cuernavaca 62508, Morelos, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, MexicoToronto Gen Hosp, Trop Dis Unit, Toronto, ON M5G 2CA, CanadaGonzalez-Ceron, L, Inst Nacl Salud Publ, Ctr Invest Paludismo, 4 Norte & 19 Poniente, Tapachula 30700, Chiapas, Mexico TI - Plasmodium vivax: Ookinete destruction and oocyst development arrest are responsible for Anopheles albimanus resistance to circumsporozoite phenotype VK247 parasites AB - Anopheles albimanus and An. pseudopunctipennis differ in their susceptibilities to Plasmodium vivax circumsporozoite phenotypes. An. pseudopunctipennis is susceptible to phenotype VK247 but almost refractory to VK210. In contrast, An. albimanus is almost refractory to VK247 but susceptible to VK210. To investigate the site in the mosquito and the parasite stage at which resistance mechanisms affect VK247 development in An. albimanus, parasite development was followed in a series of experiments in which both mosquitoes species were simultaneously infected with blood from patients. Parasite phenotype was determined in mature oocysts and salivary gland sporozoites by use of immunofluorescence and Western blot assays and/or gene identification. Ookinete maturation and their densities within the bloodmeal bolus were similar in both mosquito species. Ookinete densities on the internal midgut surface of An. albimanus were 4.7 times higher than those in An. pseudopunctipennis; however, the densities of developing oocysts on the external mid-ut surface were 6.12 times higher in the latter species. Electron microscopy observation of ookinetes in An. albimanus midgut epithelium indicated severe parasite damage. These results indicate that P. vivax VK247 parasites are destroyed at different parasite stages during migration in An. albimanus midguts. A portion, accumulated on the internal midgut surface, is probably destroyed by the mosquito's digestive enzymes and another portion is most likely destroyed by mosquito defense molecules within the midgut epithelium. A third group, reaching the external mid-ut surface, initiates oocyst development, but over 90% of them interrupt their development and die. The identification of mechanisms that participate in parasite destruction could provide new elements to construct transgenic mosquitoes resistant to malaria parasites. (C) 2001 Academic Press MH - Canada MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0014-4894 UR - ISI:000170897200005 L2 - Apicomplexa;Plasmodium vivax;Anopheles albimanus;Anopheles pseudopunctipennis;P. vivax VK210 and VK247 phenotypes;sporozoite;oocyst;midgut;circumsporozoite protein;malaria;MALARIA PARASITES; MIDGUT EPITHELIUM; MONOCLONAL-ANTIBODY; SOUTHERN MEXICO; AEDES-AEGYPTI; MOSQUITO; GALLINACEUM; FALCIPARUM; PROTEIN; PSEUDOPUNCTIPENNIS SO - Experimental Parasitology 2001 ;98(3):152-161 3053 UI - 12560 AU - Gonzalez-Esquerra R AU - Leeson S AD - Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Cuautitlan 54700, Estado Mexico, MexicoLeeson, S, Univ Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, Canada TI - Alternatives for enrichment of eggs and chicken meat with omega-3 fatty acids AB - Interest on the enrichment of eggs and poultry meat with omega-3 fatty acids (n-3 FA) has increased given their important role in human metabolism. The inclusion of n-3 FA into eggs and poultry meat is achieved by feeding ingredients such as flaxseed, fish oil, fish meal, marine algae and canola to birds. However, problems in various production parameters and sensory quality of eggs and meat may arise. The former possibly caused by antinutritional and physiological effects and the latter influenced by the interaction of volatile substances. Possible increases in formulation costs also deserve attention. Strategies to ameliorate these undesirable effects include limiting the inclusion levels of n-3 FA sources, time of feeding, mixing different n-3 FA sources in commercial rations, and including high levels of vitamin E along with high-quality ingredients. A mild heat treatment may eliminate some of the drawbacks of feeding flaxseed to birds MH - Canada MH - Mexico|Estado De Mexico PB - OTTAWA: AGRICULTURAL INST CANADA RP - NOT IN FILE U3 - TC 14 U4 - Agriculture, Dairy & Animal Science U5 - J;Review AV - English IS - 0008-3984 UR - ISI:000171854600001 L2 - omega-3;flaxseed;flax;menhaden oil;eggs;chicken meat;ALPHA-TOCOPHEROL SUPPLEMENTATION; NEWLY HATCHED CHICKS; HENS FED DIETS; MENHADEN OIL; LAYING HENS; BROILER-CHICKENS; LIPID OXIDATION; SENSORY QUALITY; MARINE-ALGAE; FISH-OIL SO - Canadian Journal of Animal Science 2001 ;81(3):295-305 3054 UI - 12713 AU - Gonzalez-Fernandez A AU - Cordoba D AU - Matias LM AU - Torne M AD - CICESE, Dept Geol, Div Ciencias Tierra, Ensenada 22830, Baja California, MexicoUniv Complutense Madrid, Dept Geofis, E-28040 Madrid, SpainUniv Lisbon, Ctr Geofis, Lisbon, PortugalCSIC, Inst Ciencias Tierra Jaume Almera, Ctr Geofis, Barcelona, SpainGonzalez-Fernandez, A, CICESE, Dept Geol, Div Ciencias Tierra, Carr Tijuana Ensenada Km 107, Ensenada 22830, Baja California, Mexico TI - Seismic crustal structure in the Gulf of Cadiz (SW Iberian Peninsula) AB - The sedimentary structure in the Gulf of Cadiz has been extensively studied by oil exploration companies. However, up to now little is known about its deep crustal structure. Moreover, the total thickness of the sedimentary layers remains unknown in large areas. The purpose of this paper is the crustal-scale interpretation of deep seismic near-vertical reflection and refraction/wide-angle reflection data obtained during the IAM (Iberian Atlantic Margins) project, carried out in 1993. Our results indicate that a continental type crust is underlying the entire Gulf of Cadiz, with progressive thinning from east to west. The sedimentary cover shows a great thickness, reaching 8 km in the center of the Gulf. Three main sedimentary units can be recognized: Jurassic-Cretaceous calcareous rocks, continuation of Algarve outcrops; the Allochthonous Units of Guadalquivir/Gulf of Cadiz, the offshore continuation of the inland Carmona nappe; and sub-horizontal post-Miocene marine sediments. The crystalline crust is divided into three main layers: the upper crust is characterized by P-wave velocity values of 5.7-6.1 km/s; the middle crust shows values of 6.3-6.4 km/s; the lower crust has a mean vertical velocity gradient of 0.02 km/s/km, with velocities between 6.9 to 7.1 km/s. The total crustal thickness varies from 27 km for the eastern part of the studied area, to 20 km for the westernmost part. The crustal thinning is more pronounced in a N-S direction than in an E-W direction. No major structures related with a defined Iberia-Africa plate boundary could be found MH - Mexico|Baja California MH - Portugal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics;Oceanography U5 - J;Article AV - English IS - 0025-3235 UR - ISI:000171402000003 L2 - crustal structure;Gulf of Cadiz;Iberian Peninsula;passive margins;seismic profiles;GIBRALTAR PLATE BOUNDARY; BETIC-CORDILLERA; EASTERN SEGMENT; ATLANTIC-OCEAN; GORRINGE BANK; AZORES; REGION; TECTONICS; EVOLUTION; MARGIN SO - Marine Geophysical Researches 2001 ;22(3):207-223 3055 UI - 13873 AU - Gonzalez-Garcia R AU - Rico-Martinez R AU - Wolf W AU - Lubke M AU - Eiswirth M AU - Anderson JS AU - Kevrekidis IG AD - Inst Tecnol Celaya, Depto Ing Quim, Celaya 38010, Gto, MexicoMax Planck Gesell, Fritz Haber Inst, D-14195 Berlin, GermanyPrinceton Univ, Dept Chem Engn, Princeton, NJ 08544, USARico-Martinez, R, Inst Tecnol Celaya, Depto Ing Quim, Celaya 38010, Gto, Mexico TI - Characterization of a two-parameter mixed-mode electrochemical behavior regime using neural networks AB - We use nonlinear signal processing techniques, based on artificial neural networks, to construct a continuous-time model (set of ordinary differential equations, ODEs) from experimental observations of mixed-mode oscillations during the galvanostatic oxidation of hydrogen on platinum in the presence of bismuth and chloride ions. The data was in the form of time-series of the potential for different values of the applied current and chloride ion concentration. We use the model to reconstruct the experimental dynamics and to explore the associated bifurcation structures in phase-space, Using numerical bifurcation techniques we locate stable and unstable periodic solutions, calculate eigenvalues. and identify bifurcation points. This approach constitutes a promising data post-processing procedure for investigating phase-space and parameter space of real experimental systems; it allows us to infer phase-space structures which the experiments can only probe with limited measurement precision and only at a discrete number of operating parameter settings. For example. the fitted model suggests the existence of a sub-critical Hopf bifurcation near the range of parameters probed in the experiments: this might explain the experimental difficulty in locating small amplitude simple oscillations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000168193400002 L2 - electrochemical systems;neural networks;mixed mode oscillations;DIFFERENTIAL-EQUATIONS; CHAOTIC OSCILLATIONS; GLOBAL BIFURCATIONS; FAREY SEQUENCE; TIME-SERIES; DYNAMICS; SYSTEM; IDENTIFICATION; SENSITIVITY; OXIDATION SO - Physica D-Nonlinear Phenomena 2001 ;151(1):27-43 3056 UI - 12490 AU - Gonzalez-Hernandez J AU - Vorobiev YV AU - Horley PP AU - Gorley PM AD - CINVESTAV, IPN, Unidad Queretaro, Queretaro 76001, MexicoChernivtsi State Univ, UA-58012 Chernovtsy, UkraineGonzalez-Hernandez, J, CINVESTAV, IPN, Unidad Queretaro, Queretaro 76001, Mexico TI - Investigation of self-organization processes in semiconductor under photo-Gunn effect AB - In the given paper, the results are presented of the investigation of non-equilibrium stationary carriers system in semiconductor under photo-Gunn effect. It was found that space-homogeneous state of the system is unstable in the case of negative differential conductivity and two waves of space-time perturbations with different phase velocities propagate through the crystal. Phase velocity degeneration conditions have been determined for these waves. Dependence of the complex attenuation decrement on external in-fluences (electric field tension, incident light intensity, semiconductor compensation degree and spectral range) has been investigated in details. State dynamics of inhomogeneous carrier system has been studied using synergetics; methods. Obtained results prove that one can controllably switch between the oscillation states of electron subsystem by changing the incident light intensity MH - Mexico|Queretaro MH - Ukraine PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900035 SO - Modern Physics Letters B 2001 ;15(17-19):712-715 3057 UI - 13168 AU - Gonzalez-Hernandez J AU - Prokhorov EF AU - Vorobiev YV AU - Morales-Sanchez E AU - Mendoza-Galvan A AU - Kostylev SA AU - Gorobets YI AU - Zakharchenko VN AU - Zakharchenko RV AD - IPN, CINVESTAV, Unidad Queretaro, Queretaro 76010, MexicoUAQ, Fac Ingn, Div Estudios Posgrad, Queretaro, MexicoEnergy Convers Devices, Troy, MI 48084, USAKiev Polytech Inst, UA-252056 Kiev, UkraineVorobiev, YV, IPN, CINVESTAV, Unidad Queretaro, AP,1-1010, Queretaro 76010, Mexico TI - Mechanism of the isotermic amorphous-to-crystalline phase transition in Ge : Sb : Te ternary alloys AB - The kinetics of the amorphous-to-crystalline (fcc) phase transition under isothermal treatments has been investigated in alloys with the composition close to Ge22Sb22Te56, which is the most frequently used for the erasable optical memory devices. For monitoring the transformation, electrical, ellipsometric, optical transmission and electron microscopy measurements were employed. A procedure to determine the transformed volume fraction based on the electrical conductivity data is proposed. It is shown that the widely accepted assumption about the linear dependence between the conductivity variation and the transformed volume fraction is not correct. The use of this assumption could give an error in the determination of the crystalline volume fraction of up to one order of magnitude. The amorphous-to-crystalline transformation kinetics observed agrees with the Johnson-Mehl-Avrami formalism. The transformation exhibits two distinct stages that are attributed to the surface and bulk nucleation, and gives an average Avrami exponent around 2. The activation energy of the process is about 4 eV, which exceeds previous estimations. (C) 2001 American Vacuum Society MH - Mexico|Queretaro MH - Ukraine MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000170111100014 L2 - GROWTH-MECHANISM; THIN-FILMS; KINETICS; TRANSFORMATION; NUCLEATION SO - Journal of Vacuum Science & Technology A-Vacuum Surfaces and Films 2001 ;19(4):1623-1629 3058 UI - 13232 AU - Gonzalez-Martinez MT AU - Galindo BE AU - De La Torre LD AU - Zapata O AU - Rodriguez E AU - Florman HM AU - Darszon A AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62271, Morelos, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Bioquim, Mexico City 07000, DF, MexicoUniv Massachusetts, Sch Med, Dept Cell Biol, Worcester, MA 01655, USADarszon, A, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Apdo Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - A sustained increase in intracellular Ca2+ is required for the acrosome reaction in sea urchin sperm AB - The acrosome reaction (AR), necessary for fertilization in many species, requires an increase in intracellular Ca2+ ([Ca2+](i)). In sea urchin sperm, the AR is triggered by an egg-jelly factor: the associated [Ca2+](i) elevation lasts minutes and involves two Ca2+ permeable channels. Both the opening of the second channel and the onset of the AR occur similar to5 s after treatment with egg factor, suggesting that these events are linked. in agreement, removal of Ca2+ from sea water or addition of Ca2+ channel blockers at the time when opening of the second channel is first detected inhibits AR and causes a "rapid" (t(1/2) = 3-15 s) decrease in [Ca2+](i) and partial inhibition of the intracellular pH change associated with the AR. Simultaneous addition of NH4Cl and either EGTA, Co2+, or Ni2+ 5 s after egg factor prevents the partial inhibition of the evoked pH(i) change observed but does not reverse AR inhibition. Therefore, the sustained increase in [Ca2+](i) caused by the second Ca2+ channel is needed for the sperm AR. Experiments with agents that induce capacitative Ca2+ uptake (thapsigargin and cyclopiazonic acid) suggest that the second channel opened during the AR could be a store-operated Ca2+ channel. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 33 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000170109200019 L2 - Ca2+ channels;sperm;store-operated channels;FUCOSE-SULFATE GLYCOCONJUGATE; STRONGYLOCENTROTUS-PURPURATUS; STORE DEPLETION; CALCIUM INFLUX; CHANNELS; THAPSIGARGIN; SPERMATOZOA; CA-2+; PH; RECEPTORS SO - Developmental Biology 2001 ;236(1):220-229 3059 UI - 13065 AU - Gonzalez-Melchor M AU - Trokhymchuk A AU - Alejandre J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBrigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoNatl Acad Sci Ukraine, Inst Condensed Matter Phys, UA-79011 Lvov, UkraineGonzalez-Melchor, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Surface tension at the vapor/liquid interface in an attractive hard-core Yukawa fluid AB - Canonical ensemble molecular dynamics and Monte Carlo simulations have been performed to study the vapor/liquid coexistence in a hard-core fluid with an attractive Yukawa interaction. Coexisting densities and pressure along the vapor/liquid coexistence line for different ranges of attractive interaction have been evaluated and found to agree well with the Gibbs ensemble Monte Carlo data reported in the literature. To obtain surface tension, the normal and tangential components of the pressure tensor have been calculated during simulations by using a hybrid molecular dynamics algorithm (which combines the hard-core and continuous forces) and by using an original numerical algorithm for the hard-core contribution to the virial in Monte Carlo simulations. We found that surface tension is strongly dependent on the range of attractive interaction, i.e., it drops when the attraction becomes short-ranged. The relation of the attractive hard-core Yukawa potential to the spherically-truncated Lennard-Jones potential in terms of the interfacial properties is discussed. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 21 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000170396300049 L2 - LENNARD-JONES FLUID; PHASE-DIAGRAM; ANALYTICAL EQUATION; MOLECULAR-DYNAMICS; C-60 MOLECULES; STATE; SIMULATIONS; TEMPERATURE; MODEL; RANGE SO - Journal of Chemical Physics 2001 ;115(8):3862-3872 3060 UI - 13451 AU - Gonzalez-Nunez R AU - Padilla H AU - De Kee D AU - Favis BD AD - Univ Guadalajara, Dipartimento Ingn Quim, Guadalajara 44430, Jalisco, MexicoTulane Univ, Dept Chem Engn, New Orleans, LA 70118, USAEcole Polytech, Dept Chem Engn, Ctr Rech Appl Polymeres CRASP, Montreal, PQ H3C 3A7, CanadaGonzalez-Nunez, R, Univ Guadalajara, Dipartimento Ingn Quim, Guadalajara 44430, Jalisco, Mexico TI - Barrier properties of polyamide-6/high density polyethylene blends AB - The barrier properties of Polyamide-6 (PA6)/High Density Polyethylene (HDPE) blends with and without compatibilizer prepared by ribbon extrusion were studied. The results show that the toluene diffusivity was improved by the addition of an interfacial agent and by inducing orientation of the polymer chains. The presence of PA-6 in the blend results in a decrease of the toluene diffusivity. This reduction is even larger for the case of the interfacial modified system. However, the most important reduction of the toluene diffusivity is observed for pure HDPE when stretched. A six-fold decrease is observed when the draw ratio is increased two fold. In the case of the permeability of different solvents through blends a gravimetric permeation cell was used. The results show that thr permeability decreases with increasing size of the penetrant molecules (CH2Cl2, CHCl3 and CCl4) and this decrease is more important for a compatibilized blend MH - Canada MH - Mexico|Jalisco MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0170-0839 UR - ISI:000169292800012 L2 - PROCESSING-MORPHOLOGY RELATIONSHIPS; IONOMER COMPATIBILIZER; POLYMER BLENDS; PERMEABILITY; DIFFUSION; OXYGEN; FILMS SO - Polymer Bulletin 2001 ;46(4):323-330 3061 UI - 14080 AU - Gonzalez-Nunez R AU - Arellano M AU - Moscoso FJ AU - Gonzalez-Romero VM AU - Favis BD AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoEcole Polytech, Dept Chem Engn, Montreal, PQ H3C 3A7, CanadaGonzalez-Nunez, R, Univ Guadalajara, Dept Ingn Quim, Blvd Gral Marcelino G Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Determination of a limiting dispersed phase concentration for coalescence in PA6/HDPE blends under extensional flow AB - Blends of PA6/HDPE at different compositions and melt-draw ratio were prepared using a twin-screw extruder with a rectangular slit at 250 degreesC. The morphology results show that at low take up velocity, the final state of deformation is independent of the dispersed phase composition. However, at high take up velocity the drop deformation increases with the composition. To determine a lower limiting concentration, at which coalescence occurs, the average particle volume of the dispersed phase was evaluated. In the concentration range of 1-4 vol% of PA6, the average volume of the particles remains constant (no coalescence) during the stretching process. However, at higher concentrations (>5 vol% of PA6) coalescence takes place and the volume increases with stretching. These results clearly indicate the limiting dispersed phase concentration for coalescence in this system under extensional flow. The approach used here represents a possible technique to separate out the relative contribution of single particle deformation and particle-particle coalescence in dispersed phase fiber formation in an extensional how field. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Jalisco PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000167609400046 L2 - coalescence;polymer blends;morphology;IMMISCIBLE POLYMER BLENDS; MORPHOLOGY; DEFORMATION SO - Polymer 2001 ;42(12):5485-5489 3062 UI - 13884 AU - Gonzalez-Sosa E AU - Braud I AU - Thony JL AU - Vauclin M AU - Calvet JC AD - UJF, IRD, INPG, CNRS,UMR 5564,LTHE, F-38041 Grenoble 9, FranceUniv Queretaro, CU, Cerro De Las Campanas, FI, MexicoMeter France, CNRM, F-31057 Toulouse, FranceBraud, I, UJF, IRD, INPG, CNRS,UMR 5564,LTHE, BP 53, F-38041 Grenoble 9, France TI - Heat and water exchanges of fallow land covered with a plant-residue mulch layer: a modelling study using the three year MUREX data set AB - The MUREX (Monitoring the Usable Soil Reservoir Experimentally) experiment was conducted on fallow land in the Southwest of France. A three year continuous data set, including climatic variables? energy fluxes, surface water content, soil moisture profiles, surface and soil temperature, and evolution of vegetation characteristics was collected. The field possessed a plant-residue mulch layer, formed naturally by the accumulation of decaying and dead biomass. The three-year data set was used to analyse and model the long-term water and heat exchanges of the field using the SiSPAT (Simple Soil Plant Atmosphere Transfer) model. The original Version was modified to take into account heat and water transfer within the plant-residue mulch layer. The 1995 data set was used for calibration of unmeasured parameters. Years 1996 and 1997 were used for validation of the approach, using the same parameter set obtained in 1995, Model results and observations were in good agreement for the three years when the plant-residue (mulch) layer effect was considered. The model properly reproduced contrasting responses to different rainfall conditions. Model simulations were used to understand some physical processes modified by the mulch layer, A decrease of 5-10% of annual total evaporation was obtained, as compared to the residue free case, associated with a decrease in soil evaporation and increase of transpiration. The decrease in soil evaporation was responsible for higher surface soil moisture. Daily soil and air temperature profiles were shown to be considerably modified by the mulch layer, an inversion occuring within thr mulch, leading to colder averages and a smaller amplitude for soil temperature. (C) 2001 Elsevier Science B,V. All rights reserved MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000168157100002 L2 - evaporation;mulch;soil water balance;energy budget;SURFACE-ENERGY BALANCE; SOIL-TEMPERATURE; STRIP TILLAGE; MOISTURE; SIMULATION; REGIMES SO - Journal of Hydrology 2001 ;244(3-4):119-136 3063 UI - 12714 AU - Gonzalez C AU - Pijoan C AU - Ciprian A AU - Correa P AU - Mendoza S AD - Univ Nacl Autonoma Mexico, Posgrado Fac Estudios Super Cuautitlan, Mexico City 04510, DF, MexicoUniv Minnesota, Coll Vet Med, CENID Microbiol INIFAP, Minneapolis, MN 55455, USAUniv Minnesota, Coll Vet Med, Dept Clin & Populat Sci, Minneapolis, MN 55455, USA TI - The effect of vaccination with the PAV-250 strain Classical Swine Fever (CSF) virus on the airborne transmission of CSF virus AB - The airborne transmission of Classical Swine Fever (CSF) virus to susceptible pigs, as well as the effect of vaccination with the CSF virus PAV-250 strain was investigated on this mode of transmission. Experiment I: four pigs were inoculated with the ALD CSFV strain (10(4.3) 50% TCID) by the intramuscular route, and at the onset of fever, they were introduced into an enclosed chamber. At the end of the experiment surviving pigs were sedated, anesthetized and euthanatized. Experiment II: four pigs were previously vaccinated with the CSF virus PAV-250 strain, and at 14 days post-vaccination they were challenged with the CSF virus ALD strain. In both experiments, four susceptible pigs were exposed to infectious aerosols by placing them in a chamber connected by a duct to the adjacent pen containing the infected animals and were kept there for 86 hs. In Experiment I, pigs exposed to contaminated air died as a result of infection with CSF virus on days 14, 21 and 28 post-inhalation. These four pigs seroconverted from day 12 post-inhalation. CSF virus was isolated from these animals, and the fluorescent antibody test on tonsils was positive. In Experiment II, a vaccinated pig exposed to contaminated air did not seroconvert, nor was CSF virus isolated from lymphoid tissues. However, mild fluorescence in tonsil sections from these pigs was observed. In conclusion, CSF virus was shown to be transmitted by air at a distance of 1 m to susceptible pigs. Vaccination with the PAV-250 CSF virus strain protected the pigs from clinical disease under the same conditions MH - Mexico|Distrito Federal MH - USA PB - TOKYO: JAPAN SOC VET SCI RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0916-7250 UR - ISI:000171383000009 L2 - airborne;CSF virus;PAV-250;transmission;EXPERIMENTAL-INFECTION; ANTIBODY-RESPONSE; PIGS; DISEASE SO - Journal of Veterinary Medical Science 2001 ;63(9):991-996 3064 UI - 12243 AU - Gonzalez D AU - Carling DE AU - Kuninaga S AU - Vilgalys R AU - Cubeta MA AD - N Carolina State Univ, Dept Plant Pathol, Plymouth, NC 27962, USADuke Univ, Dept Biol, Durham, NC 27708, USAHlth Sci Univ Hokkaido, Tobetsu, Hokkaido 0610293, JapanInst Ecol, Xalapa 91000, Veracruz, MexicoCubeta, MA, N Carolina State Univ, Dept Plant Pathol, Plymouth, NC 27962 USA TI - Ribosomal DNA systematics of Ceratobasidium and Thanatephorus with Rhizoctonia anamorphs AB - The phylogenetic relationships of anastomosis groups (AG) of Rhizoctonia associated with Ceratobasidium and Thanatephorus teleomorphs were determined by cladistic analyses of internal transcribed spacer (ITS) and 28S large subunit (LSU) regions of nuclear-encoded ribosomal DNA (rDNA). Combined analyses of ITS and LSU rDNA sequences from 41 isolates representing 28 AG of Ceratobasidium and Thanatephorus supported at least 12 monophyletic groupings within Ceratobasidium and Thanatephorus. There was strong support for separation of Ceratobasidium and Thanatephorus, however, six sequences representing different AG of Ceratobasidium grouped with certain sequences within the Thanatephorus clade. Phylogenetic analysis of ITS sequence data from 122 isolates revealed 31 genetically distinct groups from Thanatephorus (21 groups) and Ceratobasidium (10 groups) that corresponded well with previously recognized AG or AG subgroups. Although phylogenetic analysis of ITS sequences provided evidence that several AG of Ceratobasidium may be more closely related with some AG from Thanatephorus, these relationships were not as strongly supported by bootstrap analysis MH - USA MH - Japan MH - Mexico|Veracruz PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 30 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000172558700010 L2 - basidiomycetes;binucleate Rhizoctonia;phylogeny;Rhizoctonia solani;taxonomy;ANASTOMOSIS GROUPS; PHYLOGENETIC-RELATIONSHIPS; ELECTRON-MICROSCOPY; CONFIDENCE-LIMITS; SOLANI; SEQUENCES; FUNGI; COMPLEX; BOOTSTRAP; PARSIMONY SO - Mycologia 2001 ;93(6):1138-1150 3065 UI - 13679 AU - Gonzalez GM AU - Tijerina R AU - Najvar LK AU - Bocanegra R AU - Luther M AU - Rinaldi MG AU - Graybill JR AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, San Antonio, TX 78229, USAS Texas Vet Hlth Care Syst, Audie L Murphy Div, San Antonio, TX 78229, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Nuevo Leon, MexicoGonzalez, GM, Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Correlation between antifungal susceptibilities of Coccidioides immitis in vitro and antifungal treatment with caspofungin in a mouse model AB - Caspofungin (Merck Pharmaceuticals) was tested in vitro against 25 clinical isolates of Coccidoides immitis. In vitro susceptibility testing was performed in accordance with the National Committee for Clinical Laboratory Standards document M38-P guidelines. Two C. immitis isolates for which the caspofungin MICs were different were selected for determination of the minimum effective concentration (MEC), and these same strains mere used for animal studies. Survival and tissue burdens of the spleens, livers, and lungs were used as antifungal response markers. Mice infected,vith strain 98-449 (48-h MIG, 8 mug/ml; 48-h MEG, 0.125 mug/ml) showed 100% survival to day 50 when treated with caspofungin at greater than or equal to1 mg/kg. Nice infected with strain 98-571 (48-h MIG, 64 mug/ml; 48-h MEC,0.125 mug/ml) displayed greater than or equal to 80% survival when the treatment was caspofungin at greater than or equal to5 mg/kg. Treatment with caspofungin at 0.5, 1, 5, or 10 mg/kg was effective in reducing the tissue fungal burdens of mice infected with either isolate. When tissue fungal burden study results were compared between strains, caspofungin showed no statistically significant difference in efficacy in the organs of the mice treated with both strains. A better in vitro-in vivo correlation was noted when we used the MEC instead of the MIC as the endpoint for antifungal susceptibility testing. Caspofungin may have a role in the treatment of coccidioidomycosis MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 45 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000168842700037 L2 - L-743,872; CILOFUNGIN; CANDIDIASIS; SYNTHASE; INVITRO; AGENT SO - Antimicrobial Agents and Chemotherapy 2001 ;45(6):1854-1859 3066 UI - 14480 AU - Gonzalez GM AU - Sutton DA AU - Thompson E AU - Tijerina R AU - Rinaldi MG AD - Univ Texas, Hlth Sci Ctr, Dept Pathol, Fungus Testing Lab, San Antonio, TX 78229, USAS Texas Vet Hlth Care Syst, Audie L Murphy Div, San Antonio, TX 78229, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Nuevo Leon, MexicoGonzalez, GM, Univ Texas, Hlth Sci Ctr, Dept Pathol, Fungus Testing Lab, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - In vitro activities of approved and investigational antifungal agents against 44 clinical isolates of basidiomycetous fungi AB - The in vitro activity of amphotericin B, fluconazole, flucytosine, itraconazole, voriconazole, and posaconazole was evaluated against 44 clinical isolates of filamentous basidiomycetous fungi. No statistically significant differences were noted between Schizophyllum commune (n = 5), Coprinus species (n = 8), Bjerkandera adusta (n = 14), and sterile, uncharacterized basidiomycetes (n = 17) MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000166539600043 L2 - SCHIZOPHYLLUM-COMMUNE; INFECTION; PATIENT; LUNG SO - Antimicrobial Agents and Chemotherapy 2001 ;45(2):633-635 3067 UI - 12020 AU - Gonzalez MC AU - Hanlin RT AU - Ulloa M AD - Natl Autonomous Univ Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, MexicoUniv Georgia, Dept Plant Pathol, Athens, GA 30602, USAGonzalez, MC, Natl Autonomous Univ Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, Mexico TI - A checklist of higher marine fungi of Mexico AB - A checklist of Mexican higher marine fungi is presented, containing 47 ascomycetes, 1 basidiomycete and 14 mitosporic fungi. The fungi are listed from 17 localities on the Pacific Coast, 12 localities from the Gulf of Mexico Coast, and from 15 localities on the Caribbean Coast. Eleven new specimens from 18 Mexican beaches have been merged with the records from the literature. New records for Mexico are Ceriosporopsis halima and Corollospora pseudopulchella MH - Mexico|Distrito Federal MH - USA PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000173061900012 L2 - Ascomycota;arenicolous fungi;Basidiomycota;biodiversity;mitosporic fungi;mycobiota;JAPANESE BEACHES; COROLLOSPORA; GENERA SO - Mycotaxon 2001 ;80():241-253 3068 UI - 12768 AU - Gonzalez MM AU - Brandan ME AD - Univ Wisconsin, Dept Phys, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoGonzalez, MM, Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA TI - The dispersion relation applied to the radial shape and energy dependence of the O-16-O-16 potential at intermediate energies AB - An analytical expression to evaluate the dispersive contribution to the real potential for complicated energy and radial shape dependences of the empirical imaginary part is presented and applied to O-16-O-16 at intermediate energies. The calculated dispersive potentials describe the general features of the measured angular distributions and the energy dependence of the volume integrals. The best agreement with the elastic scattering data is obtained when the imaginary part is simplified to consist only of a volume term. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000171207100006 L2 - heavy-ions;elastic scattering;optical model;dispersion relation;refractive effects;nuclear rainbow;ELASTIC-SCATTERING; O-16+O-16 SYSTEM; FOLDING MODEL SO - Nuclear Physics A 2001 ;693(3-4):603-615 3069 UI - 12257 AU - Gonzalez MP AU - Saucedo I AU - Navarro R AU - Avila M AU - Guibal E AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36040, MexicoEcole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, FranceNavarro, R, Univ Guanajuato, Inst Invest Cient, Pueblito Rocha S-N, Guanajuato 36040, Mexico TI - Selective separation of Fe(III), Cd(II), and Ni(II) from dilute solutions using solvent-impregnated resins AB - The aim of this work was to study the separation of Cd(II), Fe(III), and Ni(II) from dilute solutions using solvent-impregnated resins. The separation was performed using Amberlite XAD-2 impregnated with the extractants Cyanex 272 and Cyanex 302. The influence of pH on the extraction of each metal was determined, first using liquid/liquid extraction and then using solvent-impregnated resins. Extraction isotherms and kinetics were then studied at the selected pH. Results showed that Fe(III) can be extracted from aqueous solutions at pH 2 using Amberlite XAD-2 impregnated with Cyanex 272, Cd(II) extracted at pH 2 using Amberlite XAD-2/Cyanex 302, and Ni(II) extracted at pH 8 using Amberlite XAD-2/Cyanex 302. Loaded resins can be regenerated, and the metal ions can be recovered selectively. Two fixed-bed columns arranged in-series (Amberlite XAD-2 impregnated with Cyanex 301 and Cyanex 302, respectively) were successfully used for the separation and recovery of these three metal ions from mufti-component solutions MH - France MH - Mexico|Guanajuato PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000172581900019 L2 - DI-(2,4,4-TRIMETHYLPENTYL)PHOSPHINIC ACID; LEVEXTREL RESINS; DIVALENT METALS; EXTRACTION; CYANEX-302; CU(II); CADMIUM(II); ZN(II); SORPTION; MEDIA SO - Industrial & Engineering Chemistry Research 2001 ;40(25):6004-6013 3070 UI - 13114 AU - Gonzalez R AU - Ortiz P AU - Reguera E AU - Bertran JF AD - IPN, CICATA, Mexico City 11500, DF, MexicoUniv La Habana, Fac Quim, IMRE, Havana 10400, CubaCtr Quim Farmaceut, Havana, CubaGonzalez, R, IPN, CICATA, Calzada Legaria 694,Colonia Irrigac,Delegac Migue, Mexico City 11500, DF, Mexico TI - Interaction of potassium fluoride with alpha-D-glucose AB - Addition of KF to solutions of alpha -D-glucose (alpha DG) in DMSO-d(6) and D2O alters the H-1 NMR spectra, which is attributed to an interaction of the hydrogen atoms of the -OH groups with the basic F- anions of the salt. It is shown that K+ cations do not interact with the oxygen atoms of the -OH groups of the alpha DG. Mutarotation rates Of alpha DG in D2O in the presence of potassium halides and alkaline chlorides were measured from the integrated C-13 NMR signal of the anomeric protons. The mutarotation rates were higher with KF than other potassium halides. In order to shed light on the interactions of KF with the alpha DG, the mutarotation Of alpha DG in the presence of KF and KOH were also studied using polarimetric measurements. At similar pH values, the effect of KF on the mutarotation rate is about five times that observed for KOH, indicating a major affinity for the F- anion by the anomeric proton as compared with OH-. The acceleration of the mutarotation process Of alpha DG is evidence for KF-alpha DG interactions, since NMR spectra of beta conformer are also altered by the presence of KF. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-1139 UR - ISI:000170257800002 L2 - potassium fluoride (KF);alpha-D-glucose;proton NMR;mutarotation;METAL; COMPLEXES; BINDING SO - Journal of Fluorine Chemistry 2001 ;110(1):5-10 3071 UI - 13987 AU - Gonzalez R AU - Rieumont J AU - Ortiz P AU - Mendoza L AU - Radilla J AU - Gonzalez M AD - Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, MexicoUniv La Habana, Fac Quim IMRE, Havana 10400, CubaGonzalez, R, Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Calzada Legaria 694,Colonia Irrigac,Delegac Migue, Mexico City 11500, DF, Mexico TI - Influence of water on the cationic polymerisation of 2-ethenylfuran by trifluoroacetic acid in methylene dichloride MH - Cuba MH - Mexico|Distrito Federal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1352 UR - ISI:000167923600015 L2 - FURFURYL ALCOHOL; POLYMERIZATION SO - Macromolecular Chemistry and Physics 2001 ;202(5):710-718 3072 UI - 11798 AU - Gopalswamy N AU - Lara A AU - Yashiro S AU - Kaiser ML AU - Howard RA AD - Catholic Univ Amer, Dept Phys, Ctr Solar Phys & Space Weather, Washington, DC 20064, USAUSN, Res Lab, Solar Phys Branch, Div Space Sci, Washington, DC 20375, USANASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoGopalswamy, N, Catholic Univ Amer, Dept Phys, Ctr Solar Phys & Space Weather, 200 Hannan Hall, Washington, DC 20064 USA TI - Predicting the 1-AU arrival times of coronal mass ejections AB - We describe an empirical model to predict the 1-AU arrival of coronal mass ejections (CMEs). This model is based on an effective interplanetary (IP) acceleration described by Gopalswamy et al. [2000b] that the CMEs are subject to, as they propagate from the Sun to 1 AU. We have improved this model (1) by minimizing the projection effects (using data from spacecraft in quadrature) in determining the initial speed of CMEs, and (2) by allowing for the cessation of the interplanetary acceleration before 1 AU. The resulting effective IP acceleration was higher in magnitude than what was obtained from CME measurements from spacecraft along the Sun-Earth line. We evaluated the predictive capability of the CME arrival model using recent two-point measurements from the Solar and Heliospheric Observatory (SOHO), Wind, and ACE spacecraft. We found that an acceleration cessation distance of 0.76 AU is in reasonable agreement with the observations. The new prediction model reduces the average prediction error from 15.4 to 10.7 hours. The model is in good agreement with the observations for high-speed CMEs. For slow CMEs the model as well as observations show a flat arrival time of similar to4.3 days. Use of quadrature observations minimized the projection effects naturally without the need to assume the width of the CMEs. However, there is no simple way of estimating the projection effects based on the surface location of the Earth-directed CMEs observed by a spacecraft (such as SOHO) located along the Sun-Earth line because it is impossible to measure the width of these CMEs. The standard assumption that the CME is a rigid cone may not be correct. In fact, the predicted arrival times have a better agreement with the observed arrival times when no projection correction is applied to the SOHO CME measurements. The results presented in this work suggest that CMEs expand and accelerate near the Sun (inside 0.7 AU) more than our model supposes; these aspects will have to be included in future models MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 82 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000173728500030 L2 - INTERPLANETARY SHOCKS; GEOMAGNETIC STORMS; MAGNETIC CLOUDS; TRANSIENTS; EARTH SO - Journal of Geophysical Research-Space Physics 2001 ;106(A12):29207-29217 3073 UI - 12385 AU - Gopalswamy N AU - Lara A AU - Kaiser ML AU - Bougeret JL AD - Catholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20064, USANASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUNAM, Inst Geofis, Mexico City, DF, MexicoUniv Paris, Dept Rech Spatiale, Meudon, FranceGopalswamy, N, Catholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20064 USA TI - Near-Sun and near-Earth manifestations of solar eruptions AB - We compare the near-Sun and near-Earth manifestations of solar eruptions that occurred during November 1994 to June 1998. We compared white-light coronal mass ejections, metric type II radio bursts, and extreme ultraviolet wave transients (near the Sun) with interplanetary (IP) signatures such as decameter-hectometric type II bursts, kilometric type II bursts, IP ejecta, and IP shocks. We did a two-way correlation study to (1) look for counterparts of metric type II bursts that occurred close to the central meridian and (2) look for solar counterparts of IP shocks and IP ejecta. We used data from Wind and Solar and Heliospheric Observatory missions along with metric radio burst data from ground-based solar observatories. Analysis shows that (1) most (93%) of the metric type II bursts did not have IP signatures, (2) most (80%) of the IP events (IP ejecta and shocks) did not have metric counterparts, and (3) a significant fraction (26%) of IP shocks were detected in situ without drivers. In all these cases the drivers (the coronal mass ejections) were ejected transverse to the Sun-Earth line, suggesting that the shocks have a much larger extent than the drivers. Shocks originating from both limbs of the Sun arrived at Earth, contradicting earlier claims that shocks from the west limb do not reach Earth. These shocks also had good type II radio burst association. We provide an explanation for the observed relation between metric, decameter-hectometric, and kilometric type II bursts based on the fast mode magnetosonic speed profile in the solar atmosphere MH - USA MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 49 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000172049300064 L2 - CORONAL MASS EJECTIONS; II RADIO EMISSIONS; INTERPLANETARY SHOCKS; WIND SPACECRAFT; MAGNETIC CLOUDS; LASCO OBSERVATIONS; ELECTRON-DENSITY; TRANSIENT WAVES; 1 AU; BURSTS SO - Journal of Geophysical Research-Space Physics 2001 ;106(A11):25261-25277 3074 UI - 12282 AU - Gorev NB AU - Kodzhespirova IF AU - Kovalenko YA AU - Privalov EN AU - Prokhorov EF AD - IPN, Ctr Invest & Estudios Avanzados, Lab Invest Mat, Queretaro 760001, Qro, MexicoNatl Acad Sci Ukraine, Inst Tech Mech, Dept Funct Elements Control Syst, UA-49005 Dnepropetrovsk, UkraineProkhorov, EF, IPN, Ctr Invest & Estudios Avanzados, Lab Invest Mat, Apardo Postal 1-798,Gral Arteaga 5, Queretaro 760001, Qro, Mexico TI - Effect of backgating on the field distribution in planar thin-film GaAs structures AB - The distribution of the electric field in planar film-substrate GaAs structures under backgating is considered. It is shown that backgating can make the film exhibit a long-length region of a low-gradient electric field exceeding the threshold of N-type negative differential mobility, the magnitude of negative differential mobility in this region being high enough. At values of the film doping density and film thickness typical of GaAs transferred-electron devices, this region can be as long as several tens of micrometers. The underlying physical mechanism is discussed. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000172358300008 L2 - backgating;GaAs structures;negative differential mobility;SEMI-INSULATING SUBSTRATE; IMPACT IONIZATION; MESFETS; FETS SO - Microelectronics Journal 2001 ;32(12):979-982 3075 UI - 13456 AU - Gorin T AU - Muller M AU - Seba P AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoUniv Autonoma Estado Morleos, Fac Ciencias, Cuernavaca, Morelos, MexicoAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicPedag Univ, Dept Phys, Hradec Kralove, Czech RepublicGorin, T, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Campus Morelos,Apartado Postal 48-3,Codigo Postal, Cuernavaca, Morelos, Mexico TI - Comment on "Models of intermediate spectral statistics" AB - In this Comment we point out that the semi-Poisson is well suited only as a reference point for the so-called "intermediate statistics," which cannot be interpreted as a universal ensemble, like the Gaussian orthogonal ensemble or the Poissonian statistics. In Ref. [2] it was proposed that the nearest-neighbor distribution P(s) of the spectrum of a Poissonian distributed matrix perturbed by a rank one matrix is similar to the semi-Poisson distribution. We show, however, that the P(s) of this model differs considerably in many aspects from the semi-Poisson. In addition, we give an asymptotic formula for P(s) as s-->0, which gives P'(0) = pi root3/2 for the slope at s = 0. This is different not only from the GOE case, but also from the semi-Poisson prediction MH - Czech Republic MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Letter AV - English IS - 1063-651X UR - ISI:000169285300107 L2 - METAL-INSULATOR-TRANSITION; SCATTERING SO - Physical Review e 2001 ;6306(6): 3076 UI - 12650 AU - Gorokhovsky A AU - Matazov K AU - Escalante-Garcia JI AD - CINVESTAV, Dept Ceram Engn, Saltillo 25000, Coahuila, MexicoSaratov State Tech Univ, Dept Chem, Saratov 410054, RussiaGorokhovsky, A, CINVESTAV, Dept Ceram Engn, Unidad Saltillo Carr,Saltillo Monterrey,AP 663, Saltillo 25000, Coahuila, Mexico TI - Modification of the float-glass surface by treatment with urea aqueous solution AB - The thermo-chemical modification of float-glass surface structure and properties by the aerosol of aqueous solution of urea was investigated. It is shown that the character of the modification depended on the temperature of treatment. The chemical interaction of urea. and water vapor with the soda-lime-silicate glass-yielded different products under various treatment conditions; the effects of such products on the glass properties were also analyzed. For industrial application of the investigated treatment, the temperature range of 140-160 degreesC has been identified as optimal, promoting increased mechanical strength and enhanced adhesion of glass surface to poly(vinyl butiral); also this is not related to atmosphere contamination. The effectiveness of the proposed method was tested and confirmed under industrial conditions of float-glass production. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Coahuila MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000171426000005 SO - Journal of Non-Crystalline Solids 2001 ;291(1-2):43-49 3077 UI - 13383 AU - Gorokhovsky A AU - Escalante-Garcia JI AU - Mendez-Nonell J AU - Gorokhovsky V AU - Mescheryakov D AD - CINVESTAV, Saltillo, Coahuila, MexicoSaratov State Tech Univ, Saratov, RussiaGorokhovsky, A, CINVESTAV, Saltillo, Coahuila, Mexico TI - Oil-shale ash, raw material to produce glass and glass-ceramics MH - Mexico|Coahuila MH - Russia PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7812 UR - ISI:000169627900005 SO - American Ceramic Society Bulletin 2001 ;80(7):49-52 3078 UI - 12494 AU - Gorokhovsky AV AU - Gorokhovsky VA AU - Mescheryakov DV AU - Mendez-Nonell J AU - Escalante-Garcia JI AU - Pech-Canul MI AU - Vargas-Gutierrez G AD - IPN, CINVESTAV, Dept Engn Ceram, Unidad Saltillo Monterrey, Saltillo 25000, Coahuila, MexicoSaratov State Tech Univ, Dept Bldg Mat, Saratov, RussiaGorokhovsky, AV, IPN, CINVESTAV, Dept Engn Ceram, Unidad Saltillo Monterrey, Km 3-5,Apartado Postal, Saltillo 25000, Coahuila, Mexico TI - Inorganic wastes in manufacturing of glass-ceramics: slurry of phosphorous fertilizer production and oil shale ash AB - The use of bicomponent raw material mixtures of industrial wastes to produce pyroxene glass ceramics was investigated. It is shown that oil shale ash from heat power stations can promote the production of crystalline phases and the slurry from phosphorous fertilizer production can provide sufficient concentration of nucleating agents. Mechanical and chemical properties, as well as the structure and crystallization mechanism were characterized. An increase of phosphorous oxide and fluorine concentrations leads to a change of the crystallization mechanism. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Coahuila MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000171910300019 L2 - waste utilization;glass-ceramics;oil shale ash;phosphorous slurry;structure SO - Materials Letters 2001 ;51(3):281-284 3079 UI - 13522 AU - Gosset G AU - Bonner CA AU - Jensen RA AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62250, Morelos, MexicoUniv Florida, Dept Microbiol & Cell Sci, Gainesville, FL 32611, USACUNY City Coll, Dept Chem, New York, NY 10031, USAUniv Calif Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87544, USAGosset, G, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Microbial origin of plant-type 2-keto-3-deoxy-D-arabino-heptulosonate 7-phosphate synthases, exemplified by the chorismate- and tryptophan-regulated enzyme from Xanthomonas campestris AB - Enzymes performing the initial reaction of aromatic amino acid biosynthesis, 2-keto-3-deoxy-D-arabino-heptulosonate 7-phosphate (DAHP) syntheses, exist as two distinct homology classes. The three classic Escherichia coil paralogs are AroA(I) proteins, but many members of the Bacteria possess the AroA(II) class of enzyme, sometimes in combination with AroA(I) proteins. AroA(II) DAHP syntheses until now have been shown to be specifically dedicated to secondary metabolism (e.g., formation of ansamycin antibiotics or phenazine pigment). In contrast, here we show that the Xanthomonas campestris AroA(II) protein functions as the sole DAHP synthase supporting aromatic amino acid biosynthesis. X. campestris AroA(II) was cloned in E. coil by functional complementation, and genes corresponding to two possible translation starts were expressed. We developed a 1-day partial purification method (> 99%) for the unstable protein. The recombinant AroA(II) protein was found to be subject to an allosteric pattern of sequential feedback inhibition in which chorismate is the prime allosteric effector. L-Tryptophan was found to be a minor feedback inhibitor. An N-terminal region of 111 amino acids may be located in the periplasm since a probable inner membrane-spanning region is predicted. Unlike chloroplast-localized AroA(II) of higher plants, X. campestris AroA(II) was not hysteretically activated by dithiols. Compared to plant AroA(II) proteins, differences in divalent metal activation were also observed. Phylogenetic tree analysis shows that AroA(II) originated within the Bacteria domain, and it seems probable that higher-plant plastids acquired AroA(II) from a gram-negative bacterium via endosymbiosis. The X. campestris AroA(II) protein is suggested to exemplify a case of analog displacement whereby an ancestral aroA(I) species was discarded, with the aroA(II) replacement providing an alternative pattern of allosteric control. Three subgroups of AroA,, proteins can be recognized: a large, central group containing the plant enzymes and that from X. campestris, one defined by a three-residue deletion near the conserved KPRS motif, and one possessing a larger deletion further downstream MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000169269600029 L2 - 3-DEOXY-D-MANNO-OCTULOSONATE 8-PHOSPHATE SYNTHASE; 3-DEOXY-D-ARABINO-HEPTULOSONATE-7-PHOSPHATE SYNTHASE; ESCHERICHIA-COLI; 3-AMINO-5-HYDROXYBENZOIC ACID; MC(7)N UNITS; DS-MN; BIOSYNTHESIS; ANTIBIOTICS; EVOLUTION; PRECURSOR SO - Journal of Bacteriology 2001 ;183(13):4061-4070 3080 UI - 12408 AU - Goudet C AU - Ferrer T AU - Galan L AU - Artiles A AU - Batista CFV AU - Possani LD AU - Alvarez J AU - Aneiros A AU - Tytgat J AD - Katholieke Univ Leuven, Toxicol Lab, B-3000 Louvain, BelgiumInst Cardol & Cirugia Cardiovasc, Havana 10600, CubaNatl Autonomous Univ Mexico, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoInst Oceanol, Havana 10600, CubaTytgat, J, Katholieke Univ Leuven, Toxicol Lab, E Van Evenstr 4, B-3000 Louvain, Belgium TI - Characterization of two Bunodosoma granulifera toxins active on cardiac sodium channels AB - 1 Two sodium channel toxins, BgII and BgIII, have been isolated and purified from the sea anemone Bunodosoma granulifera. Combining different techniques, we have investigated the electrophysiological properties of these toxins. 2 We examined the effect of BgII and BgIII oil rat ventricular strips. These toxins prolong action potentials with EC50 values of 60 and 660 nm and modify the resting potentials. 3 The effect on Na+ currents in rat cardiomyocytes was studied using the patch-clamp technique. BgII and BgIII slow the rapid inactivation process and increase the current density with EC50 values of 58 and 78 nm, respectively. 4 On the cloned hH1 cardiac Na+ channel expressed in Xenopus laevis oocytes, BgII and BgIII slow the inactivation process of Na+ currents (respective EC50 values of 0.38 and 7.8 mum), shift the steady-state activation and inactivation parameters to more positive potentials and the reversal potential to more negative potentials. 5 The amino acid sequences of these toxins are almost identical except for an asparagine at position 16 in BgII which is replaced by an aspartic acid in BgIII. In all experiments, BgII was more potent than BgIII suggesting that this conservative residue is important for the toxicity of sea anemone toxins. 6 We conclude that BgII and BgIII, generally known as neurotoxins, are also cardiotoxic and combine the classical effects of sea anemone Na+ channels toxins (slowing of inactivation kinetics, shift of steady-state activation and inactivation parameters) with a striking decrease on the ionic selectivity of Na+ channels MH - Belgium MH - Cuba MH - Mexico|Morelos PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 9 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000172191400009 L2 - sea anemone toxin;voltage-gated sodium channels;inactivation;ionic selectivity;cardiotoxin;neurotoxin;AMINO-ACID-SEQUENCE; XANTHOGRAMMICA HEART STIMULANT; ANEMONIA-SULCATA TOXIN; SEA-ANEMONE; ANTHOPLEURA-XANTHOGRAMMICA; SCORPION TOXINS; NA+-CHANNELS; MOLECULAR MECHANISMS; SKELETAL-MUSCLE; IONIC CURRENTS SO - British Journal of Pharmacology 2001 ;134(6):1195-1206 3081 UI - 12544 AU - Goycoolea FM AU - Milas M AU - Rinaudo M AD - Univ Grenoble 1, CNRS, Ctr Rech Macromol Vegetales, F-38041 Grenoble 9, FranceGoycoolea, FM, Ctr Invest Alimentac & Desarrollo AC, POB 1735, Hermosillo 83000, Sonora, Mexico TI - Associative phenomena in galactomannan-deacetylated xanthan systems AB - The interaction between mesquite seed galactomannan (MSG; D-mannose to D-galactose ratio (M/G) similar to 1.1) and deacetylated xanthan (DX) in 5 mM NaCl leading to synergistic gel formation at 25 degreesC was investigated and compared with the far more studied system made of xanthan and locust bean gum (LBG: M/G similar to 3.5). Rheology and differential scanning calorimetry were used to measure temperatures of gel formation and transition enthalpy as a function of polymer composition, while circular dichroism was used to probe the conformation of DX in the LBG-DX system. MSG and DX associate at 25 degreesC with a well defined stoichiometry of 0.6:1.0 (w/w) at low ionic strength Favouring the disordered coil state of DX. When LBG was used in place of MSG in water or 5 mM NaCl. two types of mechanisms of interpolymeric association are envisaged. (C) 2001 Published by Elsevier Science B.V MH - France MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0141-8130 UR - ISI:000171785800006 L2 - deacetylated-xanthan;mesquite-seed-galactomannan;locust-bean-gum;associative-interactions;gelation;LOCUST BEAN GUM; BACTERIAL POLYSACCHARIDE; AQUEOUS-SOLUTIONS; CONFORMATION; GUAR; CHROMATOGRAPHY; HYDROLYSIS; MICROSCOPY; TRANSITION; GELATION SO - International Journal of Biological Macromolecules 2001 ;29(3):181-192 3082 UI - 13762 AU - Goyette AN AU - de Urquijo J AU - Wang YC AU - Christophorou LG AU - Olthoff JK AD - Natl Inst Stand & Technol, Div Elect, Gaithersburg, MD 20899, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoGoyette, AN, Natl Inst Stand & Technol, Div Elect, Gaithersburg, MD 20899 USA TI - Electron transport, ionization, and attachment coefficients in C2F4 and C2F4/Ar mixtures AB - Measurements of electron transport, effective ionization, and attachment coefficients are reported for C2F4. In addition, measurements of the electron drift velocity and the effective ionization coefficient as a function of the density-reduced electric field E/N are reported for mixtures of C2F4 with Ar. The measured effective ionization coefficients in C2F4/Ar mixtures indicates a contribution to these coefficients from Penning ionization in dilute C2F4/Ar mixtures. The rate constant for electron attachment to C2F4 as well as the product of the longitudinal electron diffusion coefficient and the gas number density NDL in mixtures of C2F4 with Ar as functions of E/N are also reported. (C) 2001 American Institute of Physics MH - USA MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 12 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000168580500023 L2 - CYCLOTRON-RESONANCE PLASMA; INFRARED MULTIPHOTON DISSOCIATION; OCTAFLUOROCYCLOBUTANE; KINETICS; ANIONS; ARGON; DRIFT; CHF3; ION SO - Journal of Chemical Physics 2001 ;114(20):8932-8937 3083 UI - 12489 AU - Gracia FF AU - Carrillo J AU - Aceves M AU - Calleja W AU - Dominguez C AU - Falcony C AD - Benemerita Univ Autonoma Puebla, CIDS, Puebla 72000, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUAB, IMB, Ctr Nacl Microelect, Bellaterra 08913, SpainCtr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoGracia, FF, Benemerita Univ Autonoma Puebla, CIDS, AP 1651, Puebla 72000, Mexico TI - Luminescence studies in thermal oxide films with Si implantation AB - The objective of this work is to investigate the origin of the emission bands of Photo and Cathodo - luminescence (PL, CL) in thermal silicon dioxide films implanted with Silicon. The films were obtained by 150 KeV Si implantation into thermal oxide, with doses of 1 x 10(16) cm(-2) and 1 x 10(17) cm(-2). Thermal treatments of 0, 30, 60 and 180 minutes in nitrogen at 1100 degreesC were applied. We found light emission in the visible range, the bands change with the ion implantation conditions and thermal treatments. The as implanted samples present photoluminescence bands around 1.95 eV and 2.4 eV for both doses, and they disappear with thermal treatments. After annealing, the low dose samples has a photoluminescence band at 2.6 eT while those of dose of 1 x 10(17) cm(-2) has a bond centered at 1.7 eV The intensity of the bands changes with thermal treatment The cathodoluminescence bands are at 2.7 eV for both implantation doses in samples with and without thermal treatments. A discussion of the results and conclusions that contribute to better understand this nowadays controversial subject is presented MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900033 L2 - SILICON DIOXIDE; PHOTOLUMINESCENCE; NANOCRYSTALS SO - Modern Physics Letters B 2001 ;15(17-19):704-707 3084 UI - 12610 AU - Graham D AU - Holtom P AU - Lucasti C AU - Malafaia O AU - Nichols R AU - Quintero-Perez N AU - Gesser R AU - McAdams A AD - Springfield Clin Res, Springfield, IL, USALAC & USC Med Ctr, Los Angeles, CA, USASo Jersey Infect Dis, Somers Point, NJ, USAHosp Evangelico, Curitiba, Parana, BrazilTulane Univ, Sch Med, New Orleans, LA 70112, USAHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoMerck Res Labs, Blue Bell, PA, USA TI - Activity of ertapenem (ETP) vs. piperacillin/tazobactam (P/T) in polymicrobial complicated skin and skin structure infections (CSSSI) MH - Brazil MH - Mexico|Jalisco MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000171226900137 SO - Clinical Infectious Diseases 2001 ;33(7):1107-1107 3085 UI - 14519 AU - Grajales-Nishimura JM AU - Cedillo-Pardo E AU - Rosales-Dominguez C AU - Moran-Zenteno D AU - Alvarez W AU - Claeys P AU - Ruiz-Morales J AU - Garcia-Hernandez J AU - Padilla-Avila P AU - Sanchez-Rios A AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Geol & Geophys, Berkeley, CA 94720, USAMuseum Nat Kunde, D-10099 Berlin, GermanyPEMEX Explorac & Prod, Reg Marina Noreste, Campeche, MexicoGrajales-Nishimura, JM, Inst Mexicano Petr, Eje Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Chicxulub impact: The origin of reservoir and seal facies in the southeastern Mexico oil fields: Reply MH - Germany MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 0 U4 - Geology U5 - J;Editorial Material AV - English IS - 0091-7613 UR - ISI:000166441700028 L2 - CRETACEOUS-TERTIARY BOUNDARY; MASS EXTINCTION SO - Geology 2001 ;29(1):95-96 3086 UI - 12322 AU - Grant CN AU - Lalor GC AU - Vutchkov MK AU - Balcazar M AD - Univ W Indies, Int Ctr Environm & Nucl Sci, Kingston 7, JamaicaInst Nacl Invest Nucl, Mexico City, DF, MexicoLalor, GC, Univ W Indies, Int Ctr Environm & Nucl Sci, Kingston 7, Jamaica TI - Radon mapping of soils in St. Elizabeth, Jamaica AB - Soil gas measurements of radon were made in St. Elizabeth, Jamaica using nuclear track etch detectors. The results were compared to gamma-ray spectroscopy measurements made in the laboratory on soil samples collected at the radon measurement sites. An assessment of the degree of disequilibrium of uranium and thorium was also made by comparison with neutron activation analysis, delayed neutron counting and equivalent uranium and thorium measurements. The results to date for equivalent uranium and radon show a strong correlation and indicate the possibility of soil radon mapping in Jamaica using gamma-ray spectroscopy. Three anomalous sites have been identified MH - Jamaica MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000172270800011 L2 - EARTHQUAKE; BEHAVIOR SO - Journal of Radioanalytical and Nuclear Chemistry 2001 ;250(2):295-302 3087 UI - 12860 AU - Greiner J AU - Tovmassian G AU - Orio M AU - Lehmann H AU - Chavushyan V AU - Rau A AU - Schwarz R AU - Casalegno R AU - Scholz RD AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyUNAM, OAN, Ensenada 22860, Baja California, MexicoOsserv Astron Torino, I-10125 Pino Torinese, TO, ItalyUniv Wisconsin, Dept Astron, Madison, WI 53706, USAThuringer Landessternwarte, D-07778 Tautenburg, GermanyINAOE, Puebla 72000, MexicoGreiner, J, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - BZ Camelopardalis during its 1999/2000 optical low state AB - We report optical observations of the VY Scl star BZ Cam during its previous optical low state in 1999/2000. We find drastic variations in the line profiles. Narrow-band imaging observations show that its nebula extends farther than previously known and seems to be composed of two components. We determine the [OIII] line intensity of BZ Cam's nebula to 4.8x10(-13) erg/cm(2)/s. We discover a proper motion of BZ Cam of 25 +/-2 mas/yr which together with the systemic radial velocity yields a space velocity of 125 km s(-1). We re-interpret the nebula as being photo-ionized by hypothesized transient, luminous, supersoft X-ray emission during optical low states, and shaped by the transverse motion of BZ Cam MH - Germany MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171087200031 L2 - X-ray : stars;binaries : close;reflection nebulae;stars : individual : BZ Cam;RXJ0513.9-6951;CAL 83;X-RAY SOURCES; CATACLYSMIC VARIABLES; SKY SURVEY; EMISSION; NEBULAE; BINARIES; WIND SO - Astronomy & Astrophysics 2001 ;376(3):1031-1038 3088 UI - 12630 AU - Greve A AU - MacLeod G AD - Inst Radio Astron Millimetr, F-38406 St Martin Dheres, FranceInst Natl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoGreve, A, Inst Radio Astron Millimetr, 300 Rue Piscine, F-38406 St Martin Dheres, France TI - Thermal model calculations of enclosures for millimeter wavelength radio telescopes AB - Millimeter wavelength radio telescopes require a high surface and pointing precision, which in steerable open-air telescopes is obtained by a stiff or homologous construction and elaborate thermal control. The perturbing thermal loads and wind loads can also be reduced by protecting the telescope by a radome or astrodome, as applied on several operating telescopes. However, for the new generation telescopes of 30-m to 50-m diameter the radome or astrodome is very large and costly, and it is a priori not certain to which extent the internal thermal climate must be controlled, for instance, by forced air-conditioned ventilation, to obtain a telescope of good radio performance. We present data from the Onsala and Haystack radomes to illustrate agreement between measurements and thermal model calculations, and we use similar calculations to investigate the thermal behavior of a very large astrodome and radome. The accuracy of the calculations is sufficient for design and operational purposes MH - France MH - Mexico|Puebla PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics;Instruments & Instrumentation;Meteorology & Atmospheric Sciences;Remote Sensing;Telecommunications U5 - J;Article AV - English IS - 0048-6604 UR - ISI:000171570900024 L2 - DESIGN; PERFORMANCE; BEHAVIOR; ANTENNA; RADOME SO - Radio Science 2001 ;36(5):1111-1128 3089 UI - 12259 AU - Grimalsky VV AU - Mantha JH AU - Rapoport YG AU - Slavin AN AU - Zaspel CE AD - Inst Inst Astrophys Opt & Elect, Puebla, MexicoUniv Montana, W Montana Coll, Dillon, MT 59725, USAKiev TG Shevchenko State Univ, Dept Space Phys & Astron, UA-252022 Kiev, UkraineOakland Univ, Rochester, MI 48309, USAGrimalsky, VV, Inst Inst Astrophys Opt & Elect, ZP 72000, Puebla, Mexico TI - Numerical model of amplification and wave front reversal of two-dimensional spin wave packets in magnetic films AB - It has been shown experimentally, that a three-wave (first order) parametric interaction of a pulse of backward volume magnetostatic wave (BVMSW) with localized non-stationary microwave pumping in a tangentially magnetized yttrium-iron garnet (YIG) film leads to two effects: the amplification of the travelling pulse, and the generation of an additional contra-propagating wave pulse with reversed wave front and conjugated phase. This effect was observed in quasi-one-dimensional (1D) spin waveguides (narrow strips of YIG films), and was described theoretically in a 1D model. In the present work, a two-dimensional (2D) model of a wave front reversal process is developed. Dispersion and diffraction of a travelling 2D wave packet and four-wave nonlinearity that leads to the formation of solitons in the ID case and bullets in the 2D case are taken into account. The results of 2D numerical modeling of the processes of parametric amplification and front reversal for an input linear wave packet of BVMSW are presented MH - Mexico|Puebla MH - Ukraine MH - USA PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000172513500085 L2 - two-dimensional spin wave packets;three-wave parametric interaction;wave front reversal;SOLITONS SO - European Magnetic Materials and Applications 2001 ;373-3():377-380 3090 UI - 12627 AU - Grimanelli D AU - Leblanc O AU - Perotti E AU - Grossniklaus U AD - IRD CIMMYT, Apomixis Project, El Batan, Texcoco, MexicoUniv Zurich, Inst Plant Biol, Dept Plant Dev, CH-8008 Zurich, SwitzerlandGrimanelli, D, IRD CIMMYT, Apomixis Project, Carretera Mexico Veracruz Km 45-5, El Batan, Texcoco, Mexico TI - Developmental genetics of gametophytic apomixis AB - Some higher plants reproduce asexually by apomixis, a natural way of cloning through seeds. Apomictic plants produce progeny that are an exact genetic replica of the mother plant. The replication is achieved through changes in the female reproductive pathway such that female gametes develop without meiosis and embryos develop without fertilization. Although apomixis is a complex developmental process, genetic evidence suggests that it might be inherited as a simple mendelian trait-a paradox that could be explained by recent data derived from apomictic species and model sexual organisms. The data suggest that apomixis might rely more on a global deregulation of sexual reproductive development than on truly new functions, and molecular mechanisms for such a global deregulation can be proposed. This new understanding has direct consequences for the engineering of apomixis in sexual crop species, an application that could have an immense impact on agriculture MH - Mexico|Estado De Mexico MH - Switzerland PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 37 U4 - Genetics & Heredity U5 - J;Review AV - English IS - 0168-9525 UR - ISI:000171456500014 L2 - APOMICTIC DANDELIONS TARAXACUM; POLYCOMB GROUP GENE; ENDOSPERM DEVELOPMENT; SEED DEVELOPMENT; ARABIDOPSIS; GENOMES; FERTILIZATION; EXPRESSION; TRIPSACUM; EMBRYO SO - Trends in Genetics 2001 ;17(10):597-604 3091 UI - 14240 AU - Grobert N AU - Mayne M AU - Terrones M AU - Sloan J AU - Dunin-Borkowski RE AU - Kamalakaran R AU - Seeger T AU - Terrones H AU - Ruhle M AU - Walton DRM AU - Kroto HW AU - Hutchison JL AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoUniv Oxford, Inorgan Chem Lab, Wolfson Catalysis Ctr, Carbon Nanotechnol Grp, Oxford OX1 3QR, EnglandUniv Oxford, Dept Mat, Oxford OX1 3PH, EnglandCEA Saclay, DRECAM, SPAM, F-91191 Gif Sur Yvette, FranceWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Alloy nanowires: Invar inside carbon nanotubes AB - Invar (Fe65Ni35), a 'zero' thermal expansion alloy consisting of Fe and Ni, has been successfully introduced into carbon nanotubes by pyrolysing, at 800 degreesC, aerosols of NiCp2/FeCp2 mixtures dissolved in C6H6; scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) studies reveal the presence of flake-like structures (ca. 1-2 mm(2)) consisting of filled/aligned carbon nanotubes (less than or equal to 200 mum in length and less than or equal to 80 nm in diameter) in a carpet pile-like configuration; analysis of the filling material (less than or equal to 500 nm in length and less than or equal to 40 nm in diameter) by X-ray powder diffraction and high-resolution electron energy loss spectroscopy (HREELS) line scans, confirmed that Invar was formed; this appears, to the best of our knowledge, to be the first report of mixed metal alloy nanowires forming inside carbon nanotubes MH - United Kingdom MH - France MH - Germany MH - Mexico|Queretaro PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 32 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000167149600038 L2 - THIN-FILMS SO - Chemical Communications 2001 ;(5):471-472 3092 UI - 13717 AU - Grudsky S AU - Vasilevski N AD - Rostov On Don State Univ, Dept Math, Rostov On Don 344711, RussiaCINVESTAV, IPN, Dept Matemat, Mexico City 07000, DF, MexicoGrudsky, S, Rostov On Don State Univ, Dept Math, Rostov On Don 344711, Russia TI - Bergman-Toeplitz operators: Radial component influence AB - We analyze the influence of the radial component of a symbol to spectral, compactness, and Fredholm properties of Toeplitz operators, acting on the Bergman space. 2 We show that there exist compact Toeplitz operators whose (radial) symbols are unbounded near the unit circle partial derivativeD. Studying this question we give several sufficient, and necessary conditions, as well as the corresponding examples. The essential spectra of Toeplitz operators with pure radial symbols have sufficiently rich structure, and even can be massive The C*-algebras generated by Toeplitz operators with radial symbols are commubative, but the semicommutators (T-a,T-b) = T-a .T-b - T-a.b are not compact in general. Moreover for bounded operators T-a and T-b the operator T-a.b may not be bounded at all MH - Mexico|Distrito Federal MH - Russia PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 10 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000168702700002 L2 - SPACES SO - Integral Equations and Operator Theory 2001 ;40(1):16-33 3093 UI - 13933 AU - Grugeon S AU - Laruelle S AU - Herrera-Urbina R AU - Dupont L AU - Poizot P AU - Tarascon JM AD - Univ Picardie, Lab React & Chim Solides, CNRS UMR 6007, F-80039 Amiens, FranceUniv Sonora, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, MexicoGrugeon, S, Univ Picardie, Lab React & Chim Solides, CNRS UMR 6007, F-80039 Amiens, France TI - Particle size effects on the electrochemical performance of copper oxides toward lithium AB - The electrochemical reactivity of tailor-made Cu2O or CuO powders prepared according to the polyol process was tested in rechargeable Li cells. To our surprise, we demonstrated that CuO, a material well known for primary Li cells, and Cu2O could reversibly react with 1.1 Li and 2 Li ions per formula unit, respectively, leading to reversible capacities as high as 400 mAh/g in the 3-0.02 V range. The ability of copper oxide-based Li cells to retain their capacity upon numerous cycles was found to be strongly dependent on the particle size, and the best results (100% of the total capacity up to 70 cycles) were obtained with 1 mum Cu2O and CuO particles. Ex situ transmission electron microscopy data and in situ X-ray experiments show that the reduction mechanism of Cu2O by Li first involved the formation of Cu nanograins dispersed into a lithia (Li2O) matrix, followed by the growth of an organic coating that partially dissolved upon the subsequent charge while Cu converted back to Cu2O nanograins. We believe that the key to the reversible reactivity mechanism of copper oxides or other transition metal oxides toward Li is the electrochemically driven formation of highly reactive metallic nanograins during the first discharge, which enables the formation-decomposition of Li2O upon subsequent cycles. (C) 2001 The Electrochemical Society. All rights reserved MH - France MH - Mexico|Sonora PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 67 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000168008200001 L2 - LI-ION BATTERIES; TEMPERATURE; ELECTRODE; CELLS; CUO; ALPHA-FE2O3; CATHODE SO - Journal of the Electrochemical Society 2001 ;148(4):A285-A292 3094 UI - 12995 AU - Grunwald NJ AU - Flier WG AU - Sturbaum AK AU - Garay-Serrano E AU - van den Bosch TBM AU - Smart CD AU - Matuszak JM AU - Lozoya-Saldana H AU - Turkensteen LJ AU - Fry WE AD - CEEM PICTIPAPA Potato Late Blight Project, Mexico City 52176, DF, MexicoPlant Res Int, NL-6700 AA Wageningen, NetherlandsUniv Autonoma Chapingo, Dept Fitotecnia, Mexico City, DF, MexicoCornell Univ, Dept Plant Pathol, Ithaca, NY 14853, USAGrunwald, NJ, USDA ARS, 24106 N Bunn Rd, Prosser, WA 99350, USA TI - Population structure of Phytophthora infestans in the Toluca valley region of central Mexico AB - We tested the hypothesis that the population of Phytophthora infestans in the Toluca valley region is genetically differentiated according to habitat. Isolates were sampled in three habitats from (i) wild Solanum spp. (WILD), (ii) land-race varieties in low-input production systems (RURAL), and (iii) modern cultivars in high-input agriculture (VALLEY). Isolates were sampled in 1988-89 (n = 179) and in 1997-98 (n = 389). In both sampling periods, the greatest genetic diversity was observed in RURAL and VALLEY habitats. Based on the Glucose-6-phosphate isomerase and Peptidase allozymes, the subpopulations from the three habitats were significantly differentiated in both sampling periods. In contrast to allozyme data for 1997-98, no differences were found among the three subpopulations for sensitivity to metalaxyl. Two groups of isolates identical for allozyme and mating type were further investigated by restriction fragment length polymorphism fingerprinting; 65% of one group and 85% of another group were demonstrated to be unique. The genetic diversity data and the chronology of disease occurrence during the season are consistent with the hypothesis that populations of P. infestans on wild Solanum populations are derived from populations on cultivated potatoes in the central highlands of Mexico near Toluca MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 32 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000170651600009 L2 - evenness;fungicide resistance;genotypic diversity;potato late blight;rarefaction;richness;NEVADO-DE-TOLUCA; MATING-TYPE LOCI; WESTERN SLOPES; MONT DEBARY; DIVERSITY; DIFFERENTIATION; SEGREGATION; RESISTANCE; VIRULENCE; OOMYCETE SO - Phytopathology 2001 ;91(9):882-890 3095 UI - 12757 AU - Grytczuk A AU - Luca F AU - Wojtowicz M AD - T Kotarbinski Pedag Univ, Math Inst, PL-65069 Zielona Gora, PolandUNAM, Inst Matemat, Morelia 58089, Michoacan, Mexico TI - A conjecture of Erdos concerning inequalities for the Euler totient function AB - We partially confirm a conjecture of Erdos concerning inequalities between phi (n) and phi (n - phi (n)), where phi is the Euler totient function MH - Mexico|Michoacan MH - Poland PB - DEBRECEN: KOSSUTH LAJOS TUDOMANYEGYETEM RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0033-3883 UR - ISI:000171278600002 L2 - Euler function SO - Publicationes Mathematicae-Debrecen 2001 ;59(1-2):9-16 3096 UI - 14247 AU - Gu Q AU - Maiolino R AU - Dultzin-Hacyan D AD - Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsservatorio Astrofis Arcetri, I-5015 Florence, ItalyGu, Q, Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China TI - Nuclear obscuration and scattering in Seyfert 2 galaxies AB - We study the relationship between gaseous absorbing column density (N-H), infrared colors and detectability of the broad lines in a large sample of Seyfert 2 galaxies(Sy2s). We confirm that Sy2s without polarized broad lines tend to have cooler 60 mum/25 mum colors; this correlation was previously ascribed to the effect of obscuration towards the nuclear region. We find some evidence that Sy2s without polarized broad lines have larger absorbing column density (N-H) and that a fraction of them are characterized by dust lanes crossing their nuclei. However, we find that the IR colors do not correlate with N-H, in disagreement with the obscuration scenario. Also, Sy2s without polarized broad lines follow the same radio-FIR relation as normal and starburst galaxies, at variance with Sy2s with polarized broad lines. These results indicate that the lack of broad lines in the polarized spectrum of Sy2s is mostly due to the contribution/dilution from the host galaxy or from a circumnuclear starburst, though a lesser extent to the obscuration toward the nuclear region also plays a role MH - Italy MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167131600006 L2 - galaxies : active;galaxies : ISM;galaxies : Seyfert;galaxies : statistics;ACTIVE GALACTIC NUCLEI; BROAD-LINE REGION; LUMINOUS IRAS SOURCES; X-RAY; EMISSION; MODEL; SPECTROPOLARIMETRY; SPECTROSCOPY; ABSORPTION; EVOLUTION SO - Astronomy and Astrophysics 2001 ;366(3):765-770 3097 UI - 13193 AU - Gu QS AU - Huang JH AU - de Diego JA AU - Dultzin-Hacyan D AU - Lei SJ AU - Benitez E AD - Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R ChinaNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoGu, QS, Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China TI - The nuclear starburst activity in the Seyfert 2 galaxy NGC 7679 AB - We present our recent spectrophotometric results of the infrared luminous Seyfert 2 galaxy NGC 7679. We find compelling evidence for the presence of a recent nuclear starburst, revealed by the observations of a) the spectral features of high order Balmer absorption lines, b) the weak equivalent widths for CaIIK lambda 3933, CN lambda 4200, G-band lambda 4300 and MgIb lambda 5173, and c) the suggested UV stellar wind resonance lines (N V lambda 1240, Si IV lambda 1400 and C IV lambda 1550) in the IUE spectrum. Using the simple stellar population synthesis model, we find that in the nuclear 2" x 2" region, the contributions from the old, intermediate and young components are 21.7%, 42.9% and 35.4%, respectively. These nuclear starburst activities might have been triggered by the close encounter with NGC 7682, as suggested by recent numerical simulations MH - Mexico|Distrito Federal MH - Peoples R China PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000170215900016 L2 - galaxies : active;galaxies : Seyfert;galaxies : starburst;galaxies : stellar content;GASDYNAMICS SO - Astronomy & Astrophysics 2001 ;374(3):932-935 3098 UI - 14367 AU - Guarner J AU - Herrera-Goepfert R AU - Mohar A AU - Sanchez L AU - Halperin D AU - Ley C AU - Parsonnet J AD - Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Infect Dis Pathol Act, Atlanta, GA 30329, USAUNAM, Inst Nacl Cancerol, Dept Pathol, Mexico City, DF, MexicoUNAM, Inst Nacl Cancerol, Direcc Invest, Mexico City, DF, MexicoUNAM, Inst Invest Biomed, Mexico City, DF, MexicoECOSUR, Las Casas, MexicoStanford Univ, Dept Hlth Res & Policy, Stanford, CA, USAStanford Univ, Dept Med, Stanford, CA, USAGuarner, J, Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Infect Dis Pathol Act, Mailstop G32,1600 Clifton Rd NE, Atlanta, GA 30329 USA TI - Gastric atrophy and extent of intestinal metaplasia in a cohort of Helicobacter pylori-infected patients AB - Atrophy and intestinal metaplasia (IM) are preneoplastic gastric lesions associated with Helicobacter pylori, infection. Atrophy and IM are usually found together; however, the association between increasing degrees of severity of both atrophy and IM has not been evaluated completely. Two pathologists graded atrophy and IM using the visual analog scale of the Sydney classification in gastric biopsies from 368 H pylori-infected patients. Extent of IM also included determining the number of specimens affected. We then correlated the degree of atrophy with the degree and number of specimens affected with IM by calculating relative risks: (RR) and 95% confidence intervals (95% CI). The mean number of biopsies examined from each patient was 6.5, Atrophy and IM were found more frequently in the antrum (85% and 75% of biopsies, respectively), One hundred thirty-eight patients had a combination of atrophy and IM, 48 had IM only, and 89 had atrophy only. Fifty-three subjects had mild atrophy and IM (RR = 1.57; 95% CI 1.2-2.1), 69 had moderate atrophy and IM (RR = 1.86; 95% CI 1.9-2.4), and 16 had marked atrophy and IM (RR = 2.47; 95% CI 1.8-3.3). The median number of biopsy specimens with IM increased from 0 in subjects with no atrophy to 3 in subjects with severe atrophy. The degree of IM correlated with the degree of atrophy; the median degree was 0.6 in subjects with no atrophy and increased to 2.32 in those with severe atrophy. Our data suggest that higher degrees of IM in an individual specimen and increasing number of specimens with IM are associated with moderate or severe degrees of atrophy. This is a US Government work. There are no restrictions on its use MH - USA MH - Mexico|Distrito Federal MH - Mexico|Chiapas PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 8 U4 - Pathology U5 - J;Article AV - English IS - 0046-8177 UR - ISI:000166729700006 L2 - atrophy;intestinal metaplasia;Helicobacter pylori;HIGH-RISK POPULATION; PRECANCEROUS PROCESS; LESIONS; STOMACH; CANCER SO - Human Pathology 2001 ;32(1):31-35 3099 UI - 12793 AU - Guerra-Crespo M AU - Ubieta R AU - Joseph-Bravo P AU - Charli JL AU - Perez-Martinez L AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62271, Morelos, MexicoCtr Ingn Genet & Biotecnol, Havana, CubaPerez-Martinez, L, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, AP 510-3, Cuernavaca 62271, Morelos, Mexico TI - BDNF increases the early expression of TRH rnRNA in fetal TrkB(+) hypothalamic neurons in primary culture AB - Known effects of neurotrophins in the developing central nervous system include induction or regulation of peptide expression. Hypothalamic postmitotic thyrotropin-releasing hormone (TRH)-producing neurons may require neurotrophins for survival and/or differentiation. This issue was investigated using primary cell cultures derived from 17-day-old fetal rat hypothalamus seeded in serum-free medium and analysed up to 4 days in vitro culture. Neurotrophin receptor (TrkB and TrkC) mRNA expression was detected by RT-PCR in fetal hypothalamus and throughout the culture period. Western blots confirmed the expression of the full-length proteins in vitro. Semi-quantitative RT-PCR showed that the addition of brain-derived neurotrophic factor (BDNF) increases TRH mRNA levels while the addition of neurotrophin-3 does not. TRH cell content was not modified. Studies on the effect of cell density or homologous conditioned medium demonstrated that endogenous factors probably contribute to determine TRH mRNA levels. One of these factors was BDNF because basal TRH mRNA levels were reduced by the addition of a Trk inhibitor or anti-BDNF. TrkB mRNA was expressed in 27% of cells and TRH mRNA in 2% of cells. The number of TRH+ cells was not affected by BDNF treatment. Forty-eight per cent of TRH neurons contained TrkB mRNA; these neurons had higher amounts of TRH mRNA than TrkB(-) neurons. Only TrkB(+) cells responded to BDNF by increasing their TRH mRNA levels suggesting that BDNF may directly affect TRH biosynthesis. In conclusion, fetal hypothalamic TRH neurons are probably heterogeneous in regard to the neurotrophic factors enhancing peptide and mRNA levels. BDNF enhances TRH mRNA levels in a population of TrkB(+) fetal hypothalamic TRHergic neurons in primary culture. However, additional influences may be necessary for the establishment of peptide phenotype in the TrkB(+) neurons MH - Cuba MH - Mexico|Morelos PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000171184400008 L2 - neuropeptide;neurotrophin-3;rat;tyrosine kinase receptor;THYROTROPIN-RELEASING-HORMONE; CENTRAL-NERVOUS-SYSTEM; MESSENGER-RNA LEVELS; NEUROTROPHIC FACTOR; CORTICAL-NEURONS; NEUROPEPTIDE EXPRESSION; SOMATOSTATIN NEURONS; GENE-EXPRESSION; BRAIN; PROTEIN SO - European Journal of Neuroscience 2001 ;14(3):483-494 3100 UI - 13912 AU - Guerra A AU - Rocha F AU - Gonzalez AF AU - Buckle LF AD - CSIC, Inst Invest Marinas, Vigo 36208, SpainCtr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Ensenada, Baja California, MexicoGuerra, A, CSIC, Inst Invest Marinas, C Eduardo Cabello 6, Vigo 36208, Spain TI - Embryonic stages of the Patagonian squid Loligo gahi (Mollusca : Cephalopoda) AB - The embryonic development of Loligo gahi was observed from 4-day-old eggs to natural hatching. Egg strands spawned in the Valparaiso Bay, Chile, were transported to an open system tank for incubation. Temperatures ranged from 12.9 degreesC to 13.5 degreesC, salinities from 34 parts per thousand to 35 parts per thousand, and the photoperiod was 12L:12D. The period from spawning to hatching ranged from 30-35 days. The diameter of individual eggs ranged from 2.5-3.2 mm, and the dorsal mantle length of hatchlings varied from 2.6-3.1 mm. The pattern of chronological appearance of organs was quite similar to loliginid species previously examined (Loligo aff. gahi, Loligo bleekeri, Loligo pealei, Loligo vulgaris reynaudii, and Loligo forbesii). However, L. gahi had a different (faster) development time and a smaller embryo and hatchling size than L. bleekeri (Japan) and L. forbesii (eastern Atlantic Ocean). Differences (heterochronies) among species are discussed. Allometric growth of embryonic development in L. gahi using seven morphometric parameters was undertaken MH - Mexico|Baja California MH - Spain PB - SANTA BARBARA: CALIF MALACOZOOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0042-3211 UR - ISI:000167997400001 L2 - DORBIGNY; LOLIGINIDAE; WATERS; GROWTH SO - Veliger 2001 ;44(2):109-115 3101 UI - 12149 AU - Guerrero MA AU - Miranda LF AU - Chu YH AU - Rodriguez M AU - Williams RM AD - Univ Illinois, Dept Astron, Urbana, IL 61801, USACSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainINAOE, Puebla 72840, MexicoNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAGuerrero, MA, Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA TI - The constant-velocity highly collimated outflows of the planetary nebula He 2-90 AB - We present high-dispersion echelle spectroscopic observations and a narrowband [N II] image of the remarkable jetlike features of He 2-90. They are detected in the echelle spectra in the H alpha and [N II] lines but not in other nebular lines. The [N II]/H alpha ratio is uniformly high, similar or equal to1. The observed kinematics reveals bipolar collimated outflows in the jetlike features and shows that the southeast (northwest) component expands toward (away from) the observer at a remarkably constant line-of-sight velocity, 26.0 +/- 0.5 km s(-1). The observed expansion velocity and the opening angle of the jetlike features are used to estimate an inclination angle of similar or equal to5 degrees with respect to the sky plane and a space expansion velocity of similar or equal to 290 km s(-1). The spectrum of the bright central nebula reveals a profusion of Fe lines and extended wings of the H alpha line, similar to those seen in symbiotic stars and some young planetary nebulae that are presumed to host a mass-exchanging binary system. If this is the case for He 2-90, the constant velocity and direction of the jets require a very stable dynamic system against precession and warping MH - USA MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000172852900036 L2 - ISM : jets and outflows;ISM : kinematics and dynamics;planetary nebulae : individual (He 2-90);HUBBLE-SPACE-TELESCOPE; KNOTTY OUTFLOW; BIPOLAR; MICROSTRUCTURES; SPECTROSCOPY; MYCN-18; OBJECTS; FLIERS; M-1-92; STARS SO - Astrophysical Journal 2001 ;563(2):883-888 3102 UI - 13971 AU - Guerrero VM AU - Juarez R AU - Poncela P AD - ITAM, Dept Estadist, Mexico City 01000, DF, MexicoUniv Autonoma Madrid, Dept Anal Econ Econ Cuantitat, E-28049 Madrid, Spain TI - Data graduation based on statistical time series methods AB - On the basis of some suitable assumptions, we show that the best linear unbiased estimator of the true mortality rates has the form of Whittaker's solution to the graduation problem. Some statistical tools are also proposed to help reducing subjectivity when graduating a dataset. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0167-7152 UR - ISI:000167806900006 L2 - best linear unbiased estimation;difference stationarity;Whittaker graduation SO - Statistics & Probability Letters 2001 ;52(2):169-175 3103 UI - 13854 AU - Guevara-Guzman R AU - Buzo E AU - Larrazolo A AU - de la Riva C AU - Da Costa AP AU - Kendrick KM AD - Babraham Inst, Dept Neurobiol, Cambridge CB2 4AT, EnglandUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoKendrick, KM, Babraham Inst, Dept Neurobiol, Cambridge CB2 4AT, England TI - Vaginocervical stimulation-induced release of classical neurotransmitters and nitric oxide in the nucleus of the solitary tract varies as a function of the oestrus cycle AB - The effects of vaginocervical stimulation (VCS) on glutamate (GLU), aspartate (SSP), gamma -aminobutyric acid (GABA), noradrenaline (NA), arginine (ARG) and nitric oxide (NO) (citrulline) release in the nucleus of the solitary tract (nTS) were measured in anaesthetised female rats as a function of the oestrus cycle. During pro-oestrus/oestrus (P/E), but not during met-oestrus/di-oestrus (M/D), VCS significantly increased concentrations of NA, ASP, GLU, NO icitrullinei and GABA, but not ARG. Basal NA concentrations were also increased in P/E. These effects were prevented by bilateral section of either the vagus nerve or pelvic and hypogastric nerves. Vagotomy also significantly decreased basal NO concentrations in M/D and P/E while pelvic and hypogastric nerve section significantly increased GABA concentrations. Our results therefore confirm that the nTS is a relay structure for the visceral afferents sending information from the uterus into the central nervous system. The ability of VCS to trigger classical transmitter release and NO in the female is influenced by the stage of the oestrous cycle and is routed both via the vagus and pelvic/hypogastric nerves. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000168291100014 L2 - nucleus of the solitary tract;vaginocervical stimulation;neurotransmitter;microdialysis;nitric oxide;estrus cycle;DORSAL VAGAL COMPLEX; SPINAL-CORD; OLFACTORY-BULB; SYNTHASE-IMMUNOREACTIVITY; ESTROUS-CYCLE; VAGUS NERVE; PARAVENTRICULAR NUCLEUS; MATERNAL-BEHAVIOR; FEMALE RATS; D-ASPARTATE SO - Brain Research 2001 ;898(2):303-313 3104 UI - 12920 AU - Guibal E AU - Ruiz M AU - Sastre AM AU - Guzman J AU - Navarro R AD - Ecole Mines, Lab Ginie Environm Ind, F-30319 Ales, FranceUniv Politecn Catalunya, Dept Chem Engn, EUPVG, E-08028 Barcelona, SpainUniv Politecn Catalunya, Dept Chem Engn, ETSEIB, E-08028 Barcelona, SpainUniv Guanajuato, Inst Invest Cientificas, Guanajuato, Mexico TI - Influence of metal ion speciation on anion sorption using chitosan MH - France MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690002663 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U517-U517 3105 UI - 13203 AU - Guibal E AU - Ruiz M AU - Vincent T AU - Sastre A AU - Navarro-Mendoza R AD - Ecole Mines Ales, LGEI, F-30319 Ales, FranceUniv Politecn Catalunya, EUPVG, E-08800 Vilanova I La Geltru, SpainUniv Politecn Catalunya, ETSEIB, E-08028 Barcelona, SpainUniv Guanajuato, Inst Invest Cient Cerro Venada, Guanajuato 36040, MexicoGuibal, E, Ecole Mines Ales, LGEI, 6 Ave Clavieres, F-30319 Ales, France TI - Platinum and palladium sorption on chitosan derivatives AB - Chitosan is a unique biopolymer due to its cationic properties in acidic solutions. Protonation of the amino groups induces ion-exchange properties that can be used for anion recovery. As this sorbent is soluble in acidic media, it may be necessary to reinforce its chemical stability using a glutaraldehyde cross-linking treatment. Sorption properties are strongly influenced by the pH of the solution and the presence of competitor anions, especially sulfate anions. This competitor effect may be decreased by the grafting of sulfur derivatives on the chitosan backbone using glutaraldehyde as a linker between the polysaccharide chains and the substituent. Several techniques such as FTIR and SEM-EDAX were used for the chemical characterization of chitosan substitution and for the location of PGM sorption on the sorbent. Sorption isotherms and kinetics were investigated and compared for cross-linked materials and substituted polymers, and special attention was given to the influence of competitor anions. The grafting of sulfur compounds increased sorption capacities and decreased the competition of sulfate and chloride anions. While cross-linked materials sorbed platinum and palladium through anion exchange, the grafting of sulfur moities gave chelating functionalities to the ion-exchange resin MH - France MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0149-6395 UR - ISI:000170066500020 L2 - N-CARBOXYMETHYL CHITOSAN; ION SORPTION; METAL-ION; ADSORPTION; BEADS; EQUILIBRIUM; REMOVAL SO - Separation Science and Technology 2001 ;36(5-6):1017-1040 3106 UI - 14225 AU - guilar-Armenta G AU - Hernandez-Ramirez G AU - Flores-Loyola E AU - Ugarte-Castaneda A AU - Silva-Gonzalez R AU - Tabares-Munoz C AU - Jimenez-Lopez A AU - Rodriguez-Castellon E AD - Benemerita Univ Autonoma Puebla, Ctr Invest, Fac Ciencias Quim, Puebla 72570, MexicoBenemerita Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Puebla 72570, MexicoUniv Malaga, Fac Ciencias, Dept Quim Inorgan, E-29071 Malaga, SpainAguilar-Armenta, G, Benemerita Univ Autonoma Puebla, Ctr Invest, Fac Ciencias Quim, Bvd 14 Sur & Av San Claudio,CU,Col San Manuel, Puebla 72570, Mexico TI - Adsorption kinetics of CO2, O-2, N-2, and CH4 in cation-exchanged clinoptilolite AB - The rate of adsorption of pure CO2, O-2, N-2, and CH4 on natural untreated clinoptilolite-rich volcanic tuff (Cp) from Tehuacan (Puebla, Mexico), and on cation-exchanged clinoptilolite samples (Ca-Cp, K-Cp, and Na-Cp) has been measured at 20 degreesC using a glass high-vacuum volumetric apparatus. The X-ray diffraction pattern of Cp showed that the main crystalline phases correspond to clinoptilolite-heulandite and minor amounts of mordenite, cristobalite, feldspar (albite), quartz, smectite, and opal. The adsorption rates of gases in the initial period (t < 180 s) were measured with a custom acquisition data card capable of registering pressure and time data five times per second, simultaneously. The influence of cation exchange on adsorption kinetics of the gases depended on the gas-adsorbent contact time (t). In the initial period, the adsorption rate of all gases on all samples decreased in the order Ca-Cp > K-Cp > Cp > Na-Cp, and the affinity decreased in the order CO2 much greater than N-2 > O-2 > CH4, whereas at equilibrium (t --> infinity s) the adsorption uptake decreased in the sequence CO2 much greater than CH4 > N-2 > O-2. The slow adsorption of methane in Na-Cp was probably due to diffusional difficulties as a result of channel blockage by Na+ cations. By cation exchange of Cp an adsorbent can be tailored for the separation of N-2/O-2, N-2/CH4, and CO2/CH4 mixtures MH - Mexico|Puebla MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000167130800006 L2 - ZEOLITES SO - Journal of Physical Chemistry B 2001 ;105(7):1313-1319 3107 UI - 13446 AU - guilar-Frutis M AU - Garcia M AU - Falcony C AU - Plesch G AU - Jimenez-Sandoval S AD - IPN, CICATA, Mexico City 11500, DF, MexicoUniv Nacl Autonoma Mexico, IIM, Mexico City 04510, DF, MexicoInst Politecn Nacl, CINVESTAV, Mexico City 07000, DF, MexicoComenius Univ, Fac Nat Sci, Dept Inorgan Chem, Bratislava, SlovakiaAguilar-Frutis, M, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07360, DF, Mexico TI - A study of the dielectric characteristics of aluminum oxide thin films deposited by spray pyrolysis from Al(acac)(3) AB - The dielectric characteristics of aluminum oxide thin films deposited by the spray pyrolysis technique are reported. The films were deposited with different molarities from a spraying solution of aluminum acetylacetonate and N,N-dimethylformamide. The films were deposited on silicon substrates at temperatures ranging from 450 to 650 degreesC. The addition of water mist during the deposition process led to a remarkable improvement of the overall characteristics of the films. Films with excellent dielectric characteristics and low surface roughness were obtained. The results of the characterization indicate that there is a significant presence of carbon in the films. This carbon in the films modifies the electrical conduction characteristics leading to behavior similar to that displayed by off-stoichiometric silicon oxide (SiO2) films. It is observed that the overall resistivity of the film decreases when both the molarity of the solution and the deposition temperature increase. This behavior correlates with the increase in the amount of carbon remaining inside the film. The films as deposited have a surface state density in the range of 10(11) 1/eV-cm(2) and are able to stand electric fields higher than 5 MV/cm without observing dielectric breakdown. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000169378200029 L2 - aluminium oxide;dielectric properties;optical properties;pyrolysis;CHEMICAL-VAPOR-DEPOSITION SO - Thin Solid Films 2001 ;389(1-2):200-206 3108 UI - 12089 AU - guilar-Hernandez J AU - Torchynska TV AU - Becerril-Espinoza G AU - Contreras-Puente G AU - Palacios-Gomez J AU - Ita-Torres A AU - Goldstein Y AU - Many A AU - Jedrzejewski J AU - Bulakh BM AU - Scherbina LV AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Autonoma Metropolitana, Mexico City, DF, MexicoHebrew Univ Jerusalem, Rakah Inst Phys, IL-91905 Jerusalem, IsraelNatl Acad Sci, Inst Semicond Phys, Kiev, UkraineAguilar-Hernandez, J, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Photoluminescence and surface structural investigations of low-dimensional silicon systems MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000173049500017 L2 - POROUS SILICON; EXCITATION; SI; LUMINESCENCE SO - Journal of Materials Science Letters 2001 ;20(22):2061-2064 3109 UI - 13318 AU - guilar-Hernandez J AU - Potje-Kamloth K AD - Univ Bundeswehr Munchen, Fak Elektrotech, Inst Phys, D-85577 Neubiberg, GermanyIPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoAguilar-Hernandez, J, Univ Bundeswehr Munchen, Fak Elektrotech, Inst Phys, Werner Heisenberg Weg 39, D-85577 Neubiberg, Germany TI - Evaluation of the electrical conductivity of polypyrrole polymer composites AB - A study of the electrical conductivity of polypyrrole-polyoxyphenylene composites (PPy-POP and PPy-POP-MPcTS) prepared by in situ electropolymerization is presented, where MPcTS stands for tetrasulfonated tetrasodium metallophthalocyanine salts and is used as a second dopand for polypyrrole. The conductivity is studied as a function of temperature in the range 77 less than or equal to T less than or equal to 300 K. The temperature dependence of the total ac conductivity, in the frequency range 10(2)-10(5) Hz, changes by approximately five orders of magnitude, showing a sub-linear dispersive behaviour. The temperature dependence of the de conductivity gives evidence for a transport mechanism based on the Mott's variable-range hopping model in one dimension for the PPy-POP composite, which shows a crossover to three dimensions for the PPy-POP-MPcTS composites. Using this model we were able to calculate meaningful values for the density of states, hopping energy and hopping distance MH - Germany MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000169716600025 L2 - DIELECTRIC-RELAXATION; HOPPING CONDUCTIVITY; FILMS; POLYANILINE; POLYACETYLENE; FREQUENCY; TEMPERATURE; DEPENDENCE; PARAMETERS; ELECTRONS SO - Journal of Physics D-Applied Physics 2001 ;34(11):1700-1711 3110 UI - 13070 AU - guilar-Lemarroy A AU - Kirchhoff S AU - Whitaker N AU - Gariglio P AU - zur Hausen H AU - Krammer PH AU - Rosl F AD - Deutsch Krebsforschungszentrum, Forsch Schwerpunkt Angew Tumorvirol, D-69120 Heidelberg, GermanyDeutsch Krebsforschungszentrum, Forsch Schwerpunkt Tumorimmunol, D-6900 Heidelberg, GermanyUniv New S Wales, Sch Biochem & Mol Genet, Sydney, NSW, AustraliaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Mol Biol & Genet, Mexico City 07000, DF, MexicoRosl, F, Deutsch Krebsforschungszentrum, Forsch Schwerpunkt Angew Tumorvirol, Neuenheimer Feld 242, D-69120 Heidelberg, Germany TI - Differential sensitivity of human papillomavirus type 16(+) and type 18(+) cervical carcinoma cells to CD95-mediated apoptosis AB - When cervical carcinoma cells were monitored for apoptotic signals, HPV18(+) lines were found to be highly sensitive to agonistic CD95 antibodies or recombinant CD95 ligands after co-exposure with CHX (CD95(s)). In contrast, HPV16(+) cervical carcinoma cells and HPV16-immortalized non-malignant human keratinocytes were CD95-resistant (CD95(R)) under equivalent conditions. Somatic cell hybridization between CD95s and CD95(R) cervical carcinoma cell lines revealed that CD95 sensitivity was a dominant trait, which could be correlated with abundant c-Myc and low Bcl-X-L expression. Although CD95(R) cervical carcinoma cells expressed even higher levels of p53 and CD95 receptor at the surface, resistance could be attributed to the inability to form a functional DISC, necessary for successful transmission of the apoptogenic response. These data indicate that resistance to apoptotic stimuli represents an important immunological escape mechanism during virus-induced carcinogenesis. (C) 2001 Wiley-Liss, Inc MH - Australia MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 16 U4 - Oncology U5 - J;Article AV - English IS - 0020-7136 UR - ISI:000170479300010 L2 - CD95;apoptosis;cervical cancer;human papillomavirus;immunological surveillance;somatic cell hybrids;PRIMARY HUMAN KERATINOCYTES; SIGNALING COMPLEX DISC; MONOCLONAL-ANTIBODY; REGULATORY REGION; DOWN-REGULATION; NECROSIS-FACTOR; E7 PROTEIN; FAS LIGAND; C-MYC; EXPRESSION SO - International Journal of Cancer 2001 ;93(6):823-831 3111 UI - 13464 AU - guilera-Franco N AU - Hernandez-Romano U AU - Allison PA AD - Univ London Imperial Coll Sci Technol & Med, TH Huxley Sch Environm Earth Sci & Engn, London SW7 2BP, EnglandAguilera-Franco, N, Gomez Farias N 15,Col Santa Fe, Mexico City 01210, DF, Mexico TI - Biostratigraphy and environmental changes across the Cenomanian-Turonian boundary, southern Mexico AB - Integrated benthic and planktonic foraminiferal biostratigraphy has been used to correlate sections that include the transition from upper Cenomanian shallow-marine facies to lower-middle Turonian pelagic facies in southern Mexico, The Cenomanian shallow-marine, semi-restricted limestones lack planktonic foraminifers, while the Turonian pelagic limestones are almost devoid of benthic fauna, The Pseudorhapydionina dubia, Whiteinella archaeocretacea, and Helvetoglobotruncana helvetica zones have been characterised in this interval. The disappearance of the zonal marker and of most benthic foraminifers defines the top of the P, dubia zone, The W, archaeocretacea zone comprises the transition from shallow semi-restricted conditions to open-marine, deeper environments, A characteristic of this zone is the scarcity of both benthic and planktonic foraminifers, including the zonal marker, The top of this zone is marked by the first appearance of H. helvetica. Some changes in the fossil assemblages reflect the successive stages of the drowning of the platform. Others seem to be linked to global factors and have potential for wider correlations. The Cenomanian platform had its maximum development in the P, dubia zone. Adverse conditions for carbonate producers (and for platform growth) started in the latest Cenomanian, when extensive areas of the platform underwent subaerial exposure, Habitat reduction might have been an important factor for the extinction of most large benthic foraminifers at the end of the P, dubia zone, The change to deeper open marine conditions with the subsequent relative sea-level rise could have delivered the final blow to those groups that survived the habitat reduction. These organisms did not survive for long, into the W. archaeocretacea zone, Some areas deepened to pelagic conditions after a short period of grainstone deposition in which molluscs were the dominant bioclasts. In the areas where shallow-marine deposition continued, a sharp increase in algal remains indicates higher nutrient levels and mesotrophic conditions. Fully eutrophic conditions are represented in overlying facies dominated by echinoids, calcisphaerulids, and roveacrinids. This degradation of the environment further abated carbonate production and contributed to the drowning of the whole platform. (C) 2001 Elsevier Science Ltd, All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000169304700008 L2 - shallow-marine;biostratigraphy;foraminifers;ANOXIC EVENT; PLATFORMS; ZONATION SO - Journal of South American Earth Sciences 2001 ;14(2):237-255 3112 UI - 11898 AU - guilera-Navarro VC AU - Ley-Koo E AU - Mateos-Cortes S AD - UNICENTRO, Dept Quim & Fis, BR-85015430 Guarapuava, PR, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Estadual Sao Paulo, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilAguilera-Navarro, VC, UNICENTRO, Dept Quim & Fis, Caixa Postal 730, BR-85015430 Guarapuava, PR, Brazil TI - Vibrational-rotational structure of supersingular plus coulomb potential A/r(4)-Z/r AB - The vibrational-rotational states of the supersingular plus Coulomb potential A/r(4) - Z/r are variationally constructed using a nonorthogonal basis of atomic hydrogenic eigenfunctions modulated by an exponential factor exp(-alpha/r), ensuring the correct behavior in the vicinity of the supersingularity. The construction is carried out in two successive stages. The first stage is restricted to trial functions without radial nodes, leading to a variational optimization of the parameters of the basis for each value of the angular momentum. The second stage uses the complete basis to construct linear trial functions and to formulate the variational problem in terms of secular equations, yielding the successive vibrational and rotational states. Numerical results for the corresponding energy levels are presented for different combinations of the intensity parameters of the potential MH - Brazil MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000173579000011 L2 - SINGULAR PERTURBATION; SCHRODINGER-EQUATION; HARMONIC-OSCILLATOR SO - International Journal of Theoretical Physics 2001 ;40(10):1809-1816 3113 UI - 13564 AU - guillon-Robles A AU - Calmus T AU - Benoit M AU - Bellon H AU - Maury RO AU - Cotten J AU - Bourgois J AU - Michaud F AD - Univ Bretagne Occidentale, Inst Europeen Mer, UMR 6538, F-29280 Plouzane, FranceUniv Autonoma San Luis Potosi, Inst Geol, San Luis Potosi, San Luis Potosi, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Estac Reg Noreste, Hermosillo, Sonora, MexicoUniv Paris 06, Lab Geodynam Tecton, F-75252 Paris 05, FranceUniv Paris 06, UMR 6538, F-06235 Villefranche Sur Mer, FranceAguillon-Robles, A, Univ Bretagne Occidentale, Inst Europeen Mer, UMR 6538, F-29280 Plouzane, France TI - Late miocene adakites and Nb-enriched basalts from Vizcaino Peninsula, Mexico: Indicators of East Pacific Rise subduction below Southern Baja California? AB - A typical slab melt association was emplaced from 11 to 8 Ma in the Santa Clara volcanic field, Vizcaino Peninsula, Baja California Sur. It includes adakitic domes and associated pyroclastic Bow deposits, together with lava flows of niobium-enriched basalts. The tract element and isotopic (Sr-Nd-Pb) signatures of adakites are consistent with melting of altered mid-ocean ridge basalts, and the sources of the Nb-enriched basalts contain an enriched mantle wedge component. Such associations commonly form at depths of 70-80 km during low-dip subduction of very young oceanic crust. However, the Santa Clara field is relatively close (100 km) to the paleotrench, which suggests that the genesis of its adakites and Nb-enriched basalts occurred in a very high thermal regime linked to the subduction of the then-active Guadalupe spreading center of the East Pacific Rise. Our data suggest that the asthenospheric window documented below northern Baja California also developed beneath the south of the peninsula during the Neogene. This hypothesis is consistent with the spatial distribution and the ages of adkites and magnesian andesites from this region MH - France MH - Mexico|San Luis Potosi MH - Mexico|Sonora PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 38 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000169052100015 L2 - Baja California;East Pacific Rise;ridge subduction;asthenospheric window;slab melting;adakites;Nb-enriched basalts;RIDGE SUBDUCTION; VOLCANISM; WESTERN; GEOCHEMISTRY; PHILIPPINES; PERIDOTITE; MINDANAO; ELEMENT; MAGMAS; MANTLE SO - Geology 2001 ;29(6):531-534 3114 UI - 13514 AU - Guinovart-Diaz R AU - Bravo-Castillero J AU - Rodriguez-Ramos R AU - Sabina FJ AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, CP-10400 Havana 4, CubaSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726,Delegac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Closed-form expressions for the effective coefficients of fibre-reinforced composite with transversely isotropic constituents. I: Elastic and hexagonal symmetry AB - A two-phase parallel fibre-reinforced periodic elastic composite is considered wherein the constituents exhibit transverse isotropy. The fibre cross-section is circular and the periodicity is the same in two directions at an angle pi /3. Simple closed-form expressions are obtained for the effective properties of this composite by means of the asymptotic homogenization method. Numerical computation of these is easy. The analytical solution of the required resulting plane-and antiplane-strain local problems, which turns out to be only two, makes use of potential methods of a complex variable and properties of Weierstrass elliptic and related functions of periods (1,0) and (cos pi /3, sin pi /3). Hill's universal type of relations for this composite are easily derived in an elementary new way. Comparison with known bounds is shown, (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 24 U4 - Materials Science, Multidisciplinary;Mechanics;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-5096 UR - ISI:000169247200003 L2 - elastic material;fibre-reinforced composite material;inhomogeneous material;analytic functions;asymptotic analysis;PIEZOELECTRIC COMPOSITES; ASYMPTOTIC HOMOGENIZATION; PHASE-TRANSFORMATIONS; PERIODICAL STRUCTURES; UNIFORM-FIELDS; POROUS-MEDIA; MECHANICS SO - Journal of the Mechanics and Physics of Solids 2001 ;49(7):1445-1462 3115 UI - 14049 AU - Guinovart-Diaz R AU - Bravo-Castillero J AU - Rodriguez-Ramos R AU - Sabina FJ AU - Martinez-Rosado R AD - Univ La Habana, Fac Matemat & Computac, Havana 10400, CubaInst Tecnol Estudios Super Monterrey, Div Arquitectura & Ingn, Atizapan 52926, MexicoUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoGuinovart-Diaz, R, Univ La Habana, Fac Matemat & Computac, Havana 10400, Cuba TI - Overall properties of piezocomposite materials 1-3 AB - The purpose of this paper is to present analytical expressions of the effective constants of reinforced piezoelectric composite materials with periodically distributed unidirectional cylindrical fibers for transducer applications. Each periodic cell of the medium is a binary piezoelectric composite wherein both constituents are homogeneous piezoelectric materials with hexagonal symmetry. The general formulae obtained allow the prediction of global properties of an important class of piezocomposites. Numerical calculations show an adequate concordance with other theoretical models. In the analysis, the periodicity of the structure is assumed to be much smaller than the elastic wavelength. Finally, we apply these results to a 1-3 material and obtain new piezocomposites with better global properties for biomedical imaging and hydrophone applications, (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000167752600006 L2 - piezocomposite;effective properties;asymptotic homogenization;biomedical application;ULTRASONIC TRANSDUCER APPLICATIONS; COMPOSITES SO - Materials Letters 2001 ;48(2):93-98 3116 UI - 14416 AU - guire-Macedo ML AU - Scholz T AU - Gonzalez-Solis D AU - Vidal-Martinez VM AU - Posel P AU - rjona-Torres G AU - Siu-Estrada E AU - Dumailo S AD - IPN, CINVESTAV, Parasitol Lab, Unidad Merida, Merida, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicBluefields Indian & Caribbean Univ, Fac Nat Resources & Environm, Bluefields, NicaraguaAguire-Macedo, ML, IPN, CINVESTAV, Parasitol Lab, Unidad Merida, Apartado Postal 73 Cordemex, Merida, Yucatan, Mexico TI - Larval helminths parasitizing freshwater fishes from the Atlantic coast of Nicaragua AB - During a survey of the parasitic helminths of 8 fish species from the South Atlantic Autonomous Region, Nicaragua, 23 helminth species were collected. Sixteen of them were digenean species in metacercarial stage: Apharyngostrigea sp., Ascocotyle (Ascocotyle) tennicollis, Ascocotyle (Phagicola) mollienisicola, Ascocotyle (Phagicola) diminuta, Ascocotyle (Phagicola) nana, Cladocystis trifolium, Clinostomum complanatum, Clinostomum sp., Cryptogonimidae gen. sp., Diplostomum compactum, Heterophyidae gen. sp., Oligogonotylus manteri, Posthodiplostomum minimum, Proterodiplostomidae gen. sp., Stunkardiella minima, and Uvulifer sp.; 1 was a cestode larva: Proteocephalidea gen. sp.; and 6 were larval nematodes: Brevimulticaecum sp., Contracaecum sp. type II, Eustrongylides sp., Falcaustra sp., Serpinema trispinosum, and Spiroxys sp. With the exception of O. manteri, this is the first reported occurrence of these helminth species in Nicaragua. The larval helminth fauna in freshwater fishes from Nicaragua closely resembles that of freshwater fishes from southeastern Mexico MH - Czech Republic MH - Mexico|Yucatan MH - Nicaragua PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 18 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000166713900005 L2 - metacercariae;cestodes;nematodes;helminth larvae;freshwater fishes;Autonomous Region of the South Atlantic;Nicaragua;CENOTES EQUALS SINKHOLES; YUCATAN PENINSULA; MEXICO; TREMATODES SO - Comparative Parasitology 2001 ;68(1):42-51 3117 UI - 12980 AU - guirre-Diaz GJ AD - Univ Texas, Dept Geol Sci, Austin, TX 78759, USAAguirre-Diaz, GJ, UNAM, Inst Geol, Unidad Invest Ciencias Tierra, Juriquilla 76230, Queretaro, Mexico TI - Recurrent magma mingling in successive ignimbrites from Amealco caldera, central Mexico AB - The Amealco Tuff is a widespread (> 2880 km(2)), trachyandesitic to rhyolitic pyroclastic deposit in the central Mexican Volcanic Belt that was erupted from the Amealco caldera at 4.7 +/-0.1 Ma. It includes three major ignimbrites, each showing complex mingling of pumice fragments and matrix glass with andesitic to rhyolitic compositions. The different glasses are well mingled throughout each of the pyroclastic-flow deposits. Mingling of glasses may have occurred just before and during the explosive eruptions that produced the pyroclastic flows, as the distinct melts had insufficient time to homogenize. Mingling of glasses is evident in each of the three separate major ignimbrites of the Amealco Tuff; thus, the processes that caused it were repetitive. It is infered that the repetitive mingling of melts was due to repeated mafic magma inputs to an evolved magma chamber MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000170684500002 L2 - ignimbrite;caldera;magma mingling;glass;Amealco, Mexico;RATTLESNAKE TUFF; VOLCANIC-ROCKS; CHAMBER; OREGON; FLOW; DYNAMICS; RHYOLITE; LIQUIDS; BASALT SO - Bulletin of Volcanology 2001 ;63(4):238-251 3118 UI - 12785 AU - guirre-Gomez R AU - Boxall SR AU - Weeks AR AD - Univ Southampton, Dept Oceanog, Southampton Oceanog Ctr, Southampton SO14 3ZH, Hants, EnglandAguirre-Gomez, R, Natl Autonomous Univ Mexico, Inst Geog, Circuito Exterior, Coyoacan 04510, DF, Mexico TI - Detecting photosynthetic algal pigments in natural populations using a high-spectral-resolution spectroradiometer AB - Reflectance data from a high spectral resolution spectroradiometer were obtained onboard a ship in Plymouth coastal waters. These data were analysed to detect algal photosynthetic accessory pigments for comparison with absorption spectra as measured in the laboratory by a spectrophotometer. The overall spectral characteristics of Plymouth waters allowed identification as to population composition, Derivative analysis of the spectra was used to resolve characteristic peaks of specific pigments. It was determined that chlorophyll pigments, a specific carotenoid and sea water absorption bands were detectable in the reflectance data. Absorption bands of photosynthetic and accessory pigments were assessed through chromatographic pigment analysis MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0143-1161 UR - ISI:000171185100002 L2 - PERFORMANCE LIQUID-CHROMATOGRAPHY; INLAND WATER-QUALITY; MARINE-PHYTOPLANKTON; DERIVATIVE ANALYSIS; OPTICAL-PROPERTIES; OCEAN COLOR; ABSORPTION; SEA; SPECTROSCOPY; CHLOROPHYLLS SO - International Journal of Remote Sensing 2001 ;22(15):2867-2884 3119 UI - 14510 AU - guirre-Gomez R AU - Weeks AR AU - Boxall SR AD - Southampton Inst, Maritime Fac, Southampton SO14 OYN, Hants, EnglandUniv Nacl Autonoma Mexico, Inst Geog, Coyoacan 4510, DF, MexicoUniv Southampton, Dept Oceanog, Southampton Oceanog Ctr, Southampton SO17 1BJ, Hants, EnglandWeeks, AR, Southampton Inst, Maritime Fac, Southampton SO14 OYN, Hants, England TI - The identification cation of phytoplankton pigments from absorption spectra AB - The absorption spectra of photosynthetic algae are characterized by a continuous envelope, which is a result of the overlapping spectra of the indivual pigments. This feature makes it difficult to estimate the contribution of each pigment to the total absorption spectra. Derivative analysis is an objective tool for isolating absorption peaks in phytoplankton. Theoretically, electrons and ions of interacting molecules can be regarded as simple harmonic oscillators in an electromagnetic field, which result in a Lorentzian shape. However, when measured by an optical spectrophotometer the signal is transformed into a Gaussian curve. Thus, a combination of both types of curve provides a realistic approach to the decomposition of absorption spectra. In this study derivative analysis is performed on absorption spectra in order to prove that the method can be successfully used to identify the individual absorption spectra of component pigments. The spectra used are modelled phytoplankton, spectrophotometric measurements of algal cultures and samples from natural waters. A combination of Gaussian-Lorentzian shaped curves, centred on the identified peaks, were compared with the original spectra and showed good agreement MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 10 U4 - Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0143-1161 UR - ISI:000166471600007 L2 - DERIVATIVE ANALYSIS; CHLOROPHYLL; ATLANTIC; ALGAE; SEA SO - International Journal of Remote Sensing 2001 ;22(2-3):315-338 3120 UI - 13131 AU - guirre-Macedo ML AU - Scholz T AU - Gonzalez-Solis D AU - Vidal-Martinez VM AU - Posel P AU - rjona-Torres G AU - Dumailo S AU - Siu-Estrada E AD - IPN, CINVESTAV, Unidad Merida, Parasitol Lab, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicBluefields Indian & Caribbean Univ, Bluefields, NicaraguaAguirre-Macedo, ML, IPN, CINVESTAV, Unidad Merida, Parasitol Lab, Carretera Antigua Progreso Km 6,AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Some adult endohelminths parasitizing freshwater fishes from the Atlantic drainages of Nicaragua AB - Adults of 12 endoparasitic helminths were recorded from 8 freshwater fish species from the South Atlantic Autonomous Region, Nicaragua: 8 digeneans Crassicutis cichlasomae, Magnivitellinum simplex, Oligogonotylus manteri, Prosthenhystera obesa, Saccocoelioides sogandaresi, Saccocoelioides sp. 1. Saccocoelioides sp. 2, and Allocreadiidae gen. sp. ("Crepidostomum" sp.); 3 nematodes Procamallanus (Spirocamallanus) rebecae. Procamallanus (Spirocamallanus) neocaballeroi, and Rhabdochona kidderi kidderi; and 1 acanthocephalan Neoechinorhynchus golvani. Comparative measurements among S. sogandaresi from Poecilia velifera, Saccocoelioides sp. I from Cichlasoma maculicauda, and Saccocoelioides sp. 2 from Astyanax fasciatus, as well as drawings of the 2 latter species are given for future reference. All but C. cichlasomae and O. manteri are reported from Nicaragua for the first time, and most taxa also represent new geographical records for Central America. The majority of species have previously been found in freshwater fishes from southeastern Mexico, which indicates a close similarity of the helminth faunas of both regions, in accordance with previous data on the larval stages of endohelminths and gill monogeneans MH - Czech Republic MH - Mexico|Yucatan MH - Nicaragua PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 12 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000170325700007 L2 - Helminths;parasites;Digenea;Nematoda;Acanthocephala;freshwater fishes;Nicaragua;CENOTES EQUALS SINKHOLES; WATER FISHES; MEXICO; YUCATAN; TREMATODES; PENINSULA SO - Comparative Parasitology 2001 ;68(2):190-195 3121 UI - 13538 AU - guirre-Munoz A AU - Buddemeier RW AU - Camacho-Ibar V AU - Carriquiry JD AU - Ibarra-Obando SE AU - Massey BW AU - Smith SV AU - Wulff F AD - Agromarinos SA, Ensenada 22880, Baja California, MexicoUniv Kansas, Kansas Geol Survey, Lawrence, KS 66047, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoCtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Hawaii, Dept Oceanog, Honolulu, HI, USAStockholm Univ, Dept Syst Ecol, SE-10691 Stockholm, SwedenAguirre-Munoz, A, Agromarinos SA, Ave Sauzal 91, Ensenada 22880, Baja California, Mexico TI - Sustainability of coastal resource use in San Quintin, Mexico AB - San Quintin, Mexico, provides a useful site for integrated analyses of material fluxes and socioeconomic constraints in a geographically isolated system. Natural resource utilization on the land is dominated by groundwater exploitation for cultivation of horticulture crops (primarily tomatoes). Irrigation exceeds water recharge minus export by a factor of 6. Resource utilization in the bay is dominated by oyster culture; food for the oysters is provided by tidal exchange of bay and ocean water. Consideration of oyster respiration and system respiration suggests that the present level of aquaculture is about 40% of the sustainable level. A "physical unsustainability index" (PhUI) was developed to measure the proportional departure of utilization of the most limiting resource for sustainability: 6 on land; 0.4 in the bay. Based on PhUI and measures of economic development, we conclude that aquaculture is more viable than agriculture MH - Mexico|Baja California MH - Sweden MH - USA PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0044-7447 UR - ISI:000169200200005 SO - Ambio 2001 ;30(3):142-149 3122 UI - 12941 AU - guirre-Torres V AU - Perez-Trejo E AD - ITAM, Dept Estadist, Mexico City 01000, DF, MexicoUniv Warwick, Dept Stat, Coventry CV4 7AL, W Midlands, England TI - Outliers and the use of the rank transformation to detect active effects in unreplicated 2(f) experiments AB - It is well known that outliers or faulty observations affect the analysis of unreplicated factorial experiments. This work proposes a method that combines the rank transformation of the observations, the Daniel plot and a formal statistical testing procedure to assess the significance of the effects. It is shown, by means of previous theoretical results cited in the literature, examples and a Monte Carlo study, that the approach is helpful in the presence of outlying observations. The simulation study includes an ample set of alternative procedures that have been published in the literature to detect significant effects in unreplicated experiments. The Monte Carlo study also. gives evidence that using the rank transformation as proposed. provides two advantages: keeps control of the experimentwise error rate and improves the relative power to detect active factors in the presence of outlying observations MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0361-0918 UR - ISI:000170838000013 L2 - faulty observations;industrial experimentation;nonparametric analysis;rank transformation;FRACTIONAL FACTORIALS; CONTRASTS; DESIGNS; IDENTIFICATION SO - Communications in Statistics-Simulation and Computation 2001 ;30(3):637-663 3123 UI - 13760 AU - guirre-von-Wobeser E AU - Figueroa FL AU - Cabello-Pasini A AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoUniv Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, SpainCabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Photosynthesis and growth of red and green morphotypes of Kappaphycus alvarezii (Rhodophyta) from the Philippines AB - The effect of photosynthetic available radiation (PAR) levels, light quality, ultraviolet (UV) radiation, and temperature on photosynthesis, growth, and chlorophyll fluorescence was evaluated in red and green morphotypes of the rhodophyte Kappaphycus alvarezii (Doty) Doty under controlled conditions. Chlorophyll a and phycoerythrin (PE) levels were similar in the red and green morphotypes cultured under the same conditions, but phycocyanin (PC) and allophycocyanin (APC) levels were 2-fold greater in the green than in the red morphotype. Pigment characterization indicated that the overexpression of PC and APC masked the red pigmentation in the green morphotype, Maximum photosynthesis and photosynthetic efficiency were similar between the two morphotypes assayed at a wide temperature range, which was reflected in the similar growth rates observed in outdoor culture systems. In the green morphotype, photosynthetic efficiency increased 2-fold relative to the red morphotype when assayed with red light (lambda > 600 nm), indicating that photosynthetic characteristics are modified as a result of pigment variation in these morphotypes. Such increase in photosynthetic efficiency in the green morphotype, however, did not result in greater growth rates when cultured under white light. Short exposure to high levels of solar radiation (UV-A + UV-B + PAR), and filtered solar radiation (UV-A; PAR or PAR) decreased effective quantum yield (DeltaF/F-m') in both morphotypes. The reduction of DeltaF/F-m' values in the red and green morphotypes was accounted for by high levels of PAR and not by the UV-A + UV-B + PAR and UV-A + PAR treatments. Photoinhibition caused by UV-A, UV-B, or PAR was completely reversed within 30 h after incubations. Recovery rates from photoinhibition, however, were significantly reduced in the green morphotype when incubated with UV-B radiation. The results here suggest that the overexpression of pigments do not necessarily increase photosynthesis and growth in these morphotypes MH - Mexico|Baja California MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000168519900003 L2 - CHLOROPHYLL FLUORESCENCE; SOLAR-RADIATION; EUCHEUMA-DENTICULATUM; MARINE MACROPHYTES; DOTY DOTY; PHOTOINHIBITION; LIGHT; PHYCOBILISOMES; RESPONSES; PLANTS SO - Marine Biology 2001 ;138(4):679-686 3124 UI - 12827 AU - Guizado-Rodriguez M AU - riza-Castolo A AU - Merino G AU - Vela A AU - Noth H AU - Bakhmutov VI AU - Contreras R AD - Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyBakhmutov, VI, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - Weak intramolecular proton-hydride and proton-fluoride interactions: Experimental (NMR, X-ray) and DFT studies of the bis(NBH3) and bis(NBF3) adducts of 1,3-dimethyl-1,3-diazolidine AB - Bis(NBH3), bis(NBF3), and NBF3/NBH3 adducts 1-3 were prepared from 1,3-dimethyl-1,3-diazolidine and characterized by the H-1, C-13, B-11, F-19, 2D H-1-C-13 HETCOR and NOESY NMR spectra. The structures and conformations of the adducts were established by the variable-temperature H-1 NMR spectra, the X-ray diffraction method (adduct 2A), and density functional calculations at different theoretical levels. The experimental and theoretical data have revealed that bis adducts 1-3 prefer trans orientations of the borane groups (1A, 2A, 3A) in solution, the solid state, and the gas phase. The studies have shown that the energetic preference of trans adducts with respect to cis compounds, decreasing as 2A (2.9 kcal/mol) > 3A (2.7 kcal/ mol) > 1A (1.4 kcal/mol), is dictated by spatially repulsive interactions between the CH3, BH3, and BF3 groups. The results of DFT calculations agree well with an experimental trans/cis isomeric ratio of 9:1 determined in solutions of adduct 1. The calculated geometry and energy, as well as the topological analysis of electronic densities, show that trans adducts 1-3 should exist in gas phase as twist conformations T-2 stabilized by the intramolecular C-Hdelta+. . . H-delta-B or C-Hdelta+. . . F-delta-B interactions. These interactions are characterized as closed-shell. The energy of one proton-hydride and proton-fluoride intramolecular contact, estimated as 1.9 1A-T-2) and 0.7 (2A-T-2) kcal/mol, respectively, classifies the "elongated" intramolecular interactions CHdelta+. . . -deltaHB and CHdelta+. . . -deltaFB as weak ones. It has been established that, on going from gas phase to a condensed phase (solution and solid), the twist-conformations T-2 transform to conformations T-1, probably by intermolecular dipole-dipole interactions. The data presented in this work show that despite a weakness of the "elongated" proton-hydride and proton-fluoride interactions, they can play a significant role in the stabilization of conformational molecular states, especially when cooperativity is in action MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000170956300030 L2 - HYDROGEN-BONDS; ELECTRON-DIFFRACTION; DIHYDROGEN BOND; COMPLEXES; PSEUDOEPHEDRINE; OXAZOLIDINES; HETEROCYCLES; EQUILIBRIUM; PYRROLIDINE; EXCHANGE SO - Journal of the American Chemical Society 2001 ;123(37):9144-9152 3125 UI - 12843 AU - Guo X AU - Lin HM AU - Lin Z AU - Montano M AU - Sansores R AU - Wang G AU - DiAngelo S AU - Pardo A AU - Selman M AU - Floros J AD - Penn State Univ, Coll Med, Dept Cellular & Mol Physiol, Hershey, PA 17033, USAPenn State Univ, Coll Med, Dept Pediat, Hershey, PA 17033, USAPenn State Univ, Coll Med, Dept Hlth Evaluat Sci, Hershey, PA 17033, USANatl Autonomous Univ Mexico, Dept Sci, Natl Inst Resp Dis, Mexico City 04510, DF, MexicoFloros, J, Penn State Univ, Coll Med, Dept Cellular & Mol Physiol, 500 Univ Dr,H166, Hershey, PA 17033 USA TI - Surfactant protein gene A, B, and D marker alleles in chronic obstructive pulmonary disease of a Mexican population AB - Chronic obstructive pulmonary disease (COPD) is characterized by chronic inflammation. It is most likely the result of complex interactions of environmental and genetic factors. Because pulmonary surfactant components play important roles in normal lung function, innate host defence, and inflammation in the lung, this study investigated the hypothesis that the surfactant protein genes are involved in certain cases of COPD. Genotype analysis of surfactant protein (SP)-A, SP-B, SP-B-linked microsatellite, and SP-D marker alleles was performed in patients with COPD (n=97) and smoker (n=82) or nonsmoker (n=99) controls. Univariate and multiple logistic regression analyses were performed. The regression analysis results between COPD and smokers revealed several COPD susceptibility alleles (AA62_A, B1580_C, D2S388_5), based on an odds ratio (OR >2.5): The predictive ability of this model for developing COPD is good (c=0.926). Allele-allele (B1580_C and D2S388_5) and allele-environment (i.e. smoking) interactions were detected. When smoker controls were compared to nonsmoker controls, marker D2S388_5 appeared to be smoking-independent (p=0.874), whereas marker alleles AA62_A (p=0.045) and B1580_5 (p=0.007) were smoking-dependent. Males were at higher risk (OR=6.05, p=0.001), and smoking (> 50 packs.yr(-I)) increased risk (OR=5.38, p=0.007). Males and alleles of loci flanking SP-B were associated with more severe cases (forced expiratory volume in one second/forced vital capacity less than or equal to 40%). The present results indicate that the surfactant protein alleles may be useful in chronic obstructive pulmonary disease by either predicting the disease in a subgroup and/or by identifying disease subgroups that may be used for therapeutic intervention. These observations should now be confirmed in a larger study, designed according to strict epidemiological criteria MH - Mexico|Distrito Federal MH - USA PB - SHEFFIELD: EUROPEAN RESPIRATORY SOC JOURNALS LTD RP - NOT IN FILE U3 - TC 34 U4 - Respiratory System U5 - J;Article AV - English IS - 0903-1936 UR - ISI:000171073700008 L2 - chronic obstructive pulmonary disease;gene interaction;surfactant protein;surfactant proteins A, B and D;HUMAN SP-A; SUSCEPTIBILITY; VARIANTS; MUTATION; LOCUS SO - European Respiratory Journal 2001 ;18(3):482-490 3126 UI - 12283 AU - Gurin VS AU - Bogdanchikova NE AU - Petranovskii VP AD - Belarussian State Univ, Phys Chem Res Inst, Minsk 220080, ByelarusUNAM, CCMC, Ensenada 22800, Baja California, MexicoGurin, VS, Belarussian State Univ, Phys Chem Res Inst, Leningradskaja Str 14, Minsk 220080, Byelarus TI - Self-assembling of silver and copper small clusters within the zeolite cavities: prediction of geometry AB - The factors affecting a self-assembling of certain kind of silver and copper clusters during reduction of ion-exchanged forms of zeolites in hydrogen were studied. Conditions leading to the preferable M-8 cluster formation were revealed. A matching of zeolite void and cluster sizes was found to be the key factor facilitating this process. Ag-8 clusters can be easily stabilized in the zeolites with certain pore size (a cross-section in the range of 0.63-0.67 nm). Zeolites possessing voids wider than 0.70 nm stabilize these clusters only for low reduction temperatures. Small pores possessing at least one axis of pore cross-section less than or equal to0.63 nm do not stabilize Ag-8 clusters. Cu clusters assigned to Cu-8 were predicted to be formed in narrow pores of erionite much easier than in mordenite voids. Comparison of experimental UV-Vis spectra with the results of ab initio calculations for selected M-8 isomers was performed. The difference between Ag-8 and Cu-8 cluster models is discussed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Byelarus MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000172395000007 L2 - silver;copper;zeolite;ELECTRON-IMPACT IONIZATION; ION-EXCHANGED MORDENITE; PHYSICOCHEMICAL PROPERTIES; REDOX BEHAVIOR; METAL; PARTICLES; CU; MOLECULES; SITES; PHOTOLUMINESCENCE SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2001 ;18(1-2):37-44 3127 UI - 13071 AU - Gutierrez-Alejandre A AU - Gonzalez H AU - Ramirez J AU - Busca G AD - Natl Autonomous Univ Mexico, Fac Quim, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Genoa, Lab Chim Superfici & Catalisi Ind, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyRamirez, J, Natl Autonomous Univ Mexico, Fac Quim, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, Mexico TI - Hydroconversion of hydrocarbons over HZSM5 and Mo-HZSM5 catalysts: A FTIR and flow reactor study AB - The interactions of n-heptane, benzene, and toluene with HZSM5 and Mo-HZSM5 catalysts were studied by FTIR spectroscopy. The results from the FTIR study on the interactions of single molecules with these catalysts are compared with the product distribution results obtained during the hydroconversion of a model mixture of n-heptane-benzene-toluene over HZSM5-alumina and Mo-HZSM5-alumina catalysts. The FTIR study indicates that there are interactions of heptane, benzene, and toluene with both the strongly acidic internal OH's and the less acidic silanol groups in HZSM5. These interactions seem to be a precursor for the formation of carbenium ions, which are the active species in hydroconversion reactions. The incorporation of Mo into HZSM5 causes a strong decrease in the number of external silanols, suggesting that some of the impregnated Mo species are located at the external zeolite surface. It is also evident from the FTIR results that the incorporation of Mo does not entirely destroy or exchange the internal OH's of HZSM5. The addition of Mo to the zeolite, in addition to causing a decrease in the overall conversion of heptane, causes a marked simplification in the pattern of the main reaction products. The cracking and alkylation functionalities of the catalyst are almost suppressed, whereas a significant increase in skeletal isomerization is observed. This suggests, in line with the FTIR experiments, that the incorporation of Mo into the HZSM5-alumina catalyst causes a decrease in the availability of the strong Bronsted acid sites located in the cavities of the zeolite MH - Italy MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000170463200009 L2 - SURFACE-ACIDITY; ZEOLITE; ADSORPTION; CONVERSION; FERRIERITE; HEPTANE; SITES; IR; AL SO - Industrial & Engineering Chemistry Research 2001 ;40(16):3484-3494 3128 UI - 13345 AU - Gutierrez-Alejandre A AU - Castillo P AU - Ramirez J AU - Ramis G AU - Busca G AD - UNAM, Fac Quim, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Genoa, Dipartimento Ingn Chim & Proc, Lab Chim Superfici & Catalisi Ind, I-16129 Genoa, ItalyRamirez, J, UNAM, Fac Quim, UNICAT, Dept Ingn Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - Redox and acid reactivity of wolframyl centers on oxide carriers: Bronsted, Lewis and redox sites AB - Catalysts prepared by impregnating tungsten oxide on alumina, titania and zirconia and their mixed oxides have been characterized by skeletal IR, IR of adsorbed ammonia, Raman and UV-VIS-NIR spectroscopies and by temperature programmed reduction. In all cases catalysts with W loading well below the monolayer have been taken into consideration. Surface mono-ore wolframyl species with similar low coordination structure have been found to largely predominate in all the supports. However, the W=O bond length, the Lewis acidity, the charge transfer transition energies and the reducibility of the WO, species strongly depend on the support nature. In particular, the wolframyls on alumina are most acidic, have higher charge transfer transition energies and are less easily reducible than those on titania. The wolframyls on zirconia show intermediate properties. Evidence is given for the different behavior of wolframyl centers in spite of their similar geometric "molecular" structure. The different properties of wolframyl centers on the supports used here explain the different behavior of these materials for hydrocarbon conversion, in the selective catalytic reduction of NO by ammonia and as precursors of hydrodesulphurization catalysts. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000169790100018 L2 - tungsten oxide;alumina;titania;zirconia;alumina-titania;titania-zirconia;redox sites;Bronsted acid sites;Lewis acid sites;AL2O3-TIO2 MIXED OXIDES; TUNGSTEN-OXIDE; HYDRODESULFURIZATION ACTIVITY; HYDROTREATING CATALYSTS; MOLECULAR-STRUCTURES; ALUMINA; REDUCTION; SUPPORTS; ISOMERIZATION; SPECTROSCOPY SO - Applied Catalysis A-General 2001 ;216(1-2):181-194 3129 UI - 14316 AU - Gutierrez-Pena E AU - Walker SG AD - Univ Nacl Autonoma Mexico, IIMAS, Dept Probabilidad & Estadist, Mexico City 01000, DF, MexicoUniv Bath, Dept Math Sci, Bath BA2 7AY, Avon, England TI - A Bayesian predictive approach to model selection AB - This paper proposes a predictive approach to Bayesian model selection based on independent and identically distributed observations. In particular, we generalise the criterion of San Martini and Spezzaferri (J Roy. Statist. Sec. B 46 (1984) 296-303) to take into account more realistic views as discussed by Bernardo and Smith (Bayesian Theory. Wiley, Chichester, 1994). The former authors only consider what the latter authors name the M-closed view; that is, the assumption that one of the competing models is the true model. More realistic is the. M-open view in which it is believed that none of the competing models is the true model. Our new approach can encompass both of these views and moreover we introduce the M-mixture view where the experimenter can express prior opinion concerning his/her belief as to whether one of the competing models is the true model or mot. Essentially, we embed the. M-open view in a larger (nonparametric) M-closed view. (C) 2001 Elsevier Science B.V. All rights reserved. MSG: 62A15; 62C99; 62E99 MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0378-3758 UR - ISI:000166861200017 L2 - Bayesian model selection;decision theory;dirichlet process;predictive distribution;NONPARAMETRIC PROBLEMS; INFORMATION; CHOICE SO - Journal of Statistical Planning and Inference 2001 ;93(1-2):259-276 3130 UI - 13012 AU - Gutierrez-Rodriguez A AU - Hernandez-Ruiz MA AU - Sampayo OA AD - Univ Autonoma Zacatecas, Escuela Fis, Zacatecas 98060, MexicoInst Tecnol Monterrey, Zacatecas 98068, MexicoUniv Mar del Plata, Dept Fis, RA-7600 Mar Del Plata, ArgentinaGutierrez-Rodriguez, A, Univ Autonoma Zacatecas, Escuela Fis, Apartado Postal C-580, Zacatecas 98060, Mexico TI - Detecting the h(0), H-0, A(0), H-+/- Higgs bosons at future e(+)e(-) colliders AB - We investigate the possibility of detecting the Higgs bosons predicted in the Minimal Supersymmetric extension of the Standard Model (h(0), H-0, A(0),H+/-), with the reactions e(+)e(-) --> bbh(0)(H-0, A(0)), and e(+)e(-) --> tau (-)(v) over bar H-r(-) using the helicity formalism. We analyze the region of parameter space (m(A0) - tan beta) where h(0), H-0, A(0) and H+/- could be detected in the limit when tan beta is large. The numerical computation is done considering two stages of a possible Next Linear e(+)e(-) Collider: the first with roots = 500 GeV and design luminosity 50 fb(-1), and the second with roots = 1 TeV and luminosity 100-200 fb(-1) MH - Argentina MH - Mexico|Zacatecas PB - TOKYO: PHYSICAL SOCIETY JAPAN RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9015 UR - ISI:000170656300014 L2 - non-standard model Higgs Bosons;supersymmetric models;SUPERSYMMETRIC STANDARD MODEL; MASS SUM-RULES; GAUGE-THEORIES; MULTIPLE BREMSSTRAHLUNG; HIGH-ENERGIES; E+E COLLIDERS; RADIATIVE-CORRECTIONS; HELICITY AMPLITUDES; LINEAR COLLIDER; QCD CORRECTIONS SO - Journal of the Physical Society of Japan 2001 ;70(8):2300-2310 3131 UI - 13160 AU - Gutierrez-Vega JC AU - Iturbe-Castillo MD AU - Ramirez GA AU - Tepichin E AU - Rodriguez-Dagnino RM AU - Chavez-Cerda S AU - New GHC AD - Imperial Coll, Blackett Lab, Quantum Opt & Laser Sci Grp, London SW7 2BW, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoInst Tecnol Estud Super Monterrey, Ctr Elect & Telecommun, Monterrey 64849, NL, MexicoChavez-Cerda, S, Imperial Coll, Blackett Lab, Quantum Opt & Laser Sci Grp, London SW7 2BW, England TI - Experimental demonstration of optical Mathieu beams AB - We report the first experimental observation of zero-order Mathieu beams which are fundamental non-diffracting solutions of the wave equation in elliptic cylindrical coordinates. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Nuevo Leon MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 34 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000170134300004 L2 - nondiffracting beams;bessel beams;Mathieu beams;Gaussian beams;propagation-invariant optical fields;conical waves;beam propagation;electromagnetic waves;BESSEL BEAMS; SHAPED BEAMS; WAVE SO - Optics Communications 2001 ;195(1-4):35-40 3132 UI - 13073 AU - Gutierrez-Yurrita PJ AU - Montes C AD - Univ Autonoma Madrid, Dept Ecol, E-28049 Madrid, SpainGutierrez-Yurrita, PJ, Univ Autonoma Queretaro, Fac Ciencias Nat, Ctr Univ S-N,Cerro Campanas, Queretaro 76010, Mexico TI - Bioenergetics of juveniles of red swamp crayfish (Procambarus clarkii) AB - Procambarus clarkii is an endemic North American crayfish species that was introduced into Spain in 1973 for aquacultural and fishing purposes. Although P. clarkii is a well-studied species for commercial production, there is a great gap in the knowledge of the bioenergetics of juveniles. The aims of this study were to quantify the elements of the energy flow for juveniles of P. clarkii when fed in the laboratory on four different diets. The diets used were: (1) trade commercial feed; (2) various dried algal species, (3) dried Gammarus pulex; and (4) an equal mixture of algal species and G. pulex. The best energetic balance was obtained with diet 3 (greatest energy directed to production P = 57%; least energetic investment in respiration R = 31%, excretion U = 9%, but highest energy loss via faeces F = 4%). The poorest energetic balance was observed with diet 4 (P = 26.3%; R = 55.5%; U = 14.7%, but lower energy loss in faeces F = 3.5%). The mean O:N relationship was 1.37 +/- 2.15, implying marked protein catabolism. The utility of studying the bioenergetics of juvenile P. clarkii in laboratory conditions results in the formulation of testable hypotheses about ecological facts and the provision of new insights into the management of their populations in natural environments. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Queretaro MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Physiology;Zoology U5 - J;Article AV - English IS - 1095-6433 UR - ISI:000170472500004 L2 - energy balance;ecophysiology;production;metabolism;oxygen consumption;nitrogen excretion;metabolic efficiencies;assimilation;DONANA-NATIONAL-PARK; RESPONSES; DIETARY; ENERGY; GROWTH; SPAIN; RATIO; FEEDS SO - Comparative Biochemistry and Physiology A-Molecular and Integrative Physiology 2001 ;130(1):29-38 3133 UI - 13183 AU - Gutierrez ALM AU - Rodenstein DO AD - Univ Catholique Louvain, Clin Univ St Luc, Div Resp, B-1200 Brussels, BelgiumInst Nacl enfermed Resp, Lab Sueno, Mexico City, DF, MexicoRodenstein, DO, Univ Catholique Louvain, Clin Univ St Luc, Div Resp, Av Hippocrate 10, B-1200 Brussels, Belgium TI - The search for the Holy Grail and the upper airway resistance syndrome. New data are welcome MH - Belgium MH - Mexico|Distrito Federal PB - SHEFFIELD: EUROPEAN RESPIRATORY SOC JOURNALS LTD RP - NOT IN FILE U3 - TC 0 U4 - Respiratory System U5 - J;Editorial Material AV - English IS - 0903-1936 UR - ISI:000170209000001 L2 - SLEEP-APNEA; ASSOCIATION SO - European Respiratory Journal 2001 ;17(5):835-837 3134 UI - 12458 AU - Gutierrez MB AU - Aparicio JMR AU - Barrientos MP AU - Senties JLPY AU - Salinas CF AD - Hosp Nino Poblano, Puebla, MexicoMed Univ S Carolina, Charleston, SC 29425, USA TI - A Report of Recesive Inheritance in 14 cases with COCKAYNE SYNDROME in 3 families from an Endemic Mexican State, where Genetic Factors (CONSANGUINITY) contribute for the development of the disease MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901206 L2 - Cockayne Syndrome;xeroderma pigmentosum;autosomal recessive inheritance SO - American Journal of Human Genetics 2001 ;69(4):389-389 3135 UI - 13847 AU - Gutierrez R AU - Heinemann U AD - Inst Politecn Nacl, CINVESTAV, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoHumboldt Univ, Johannes Muller Inst Physiol, D-10117 Berlin, GermanyGutierrez, R, Inst Politecn Nacl, CINVESTAV, Dept Fisiol Biofis & Neurociencias, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Kindling induces transient fast inhibition in the dentate gyrus-CA3 projection AB - The granule cells of the dentate gyrus (DG) send a strong glutamatergic projection, the mossy fibre tract, toward the hippocampal CA3 field, where it excites pyramidal cells and neighbouring inhibitory interneurons. Despite their excitatory nature, granule cells contain small amounts of GAD (glutamate decarboxylase), the main synthetic enzyme for the inhibitory transmitter GABA. Chronic temporal lobe epilepsy results in transient upregulation of GAD and GABA in granule cells, giving rise to the speculation that following overexcitation, mossy fibres exert an inhibitory effect by release of GABA. We therefore stimulated the DG and recorded synaptic potentials from CA3 pyramidal cells in brain slices from kindled and control rats. In both preparations, DG stimulation caused excitatory postsynaptic potential (EPSP)/inhibitory postsynaptic potential (IPSP) sequences. These potentials could be completely blocked by glutamate receptor antagonists in control rats, while in the kindled rats, a bicuculline-sensitive fast IPSP remained, with an onset latency similar to that of the control EPSP. Interestingly, this IPSP disappeared 1 month after the last seizure. When synaptic responses were evoked by high-frequency stimulation, EPSPs in normal rats readily summate to evoke action potentials. In slices from kindled rats, a summation of IPSPs overrides that of the EPSPs and reduces the probability of evoking action potentials. Our data show for the first time that kindling induces functionally relevant activity-dependent expression of fast inhibition onto pyramidal cells, coming from the DG, that can limit CA3 excitation in a frequency-dependent manner MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 40 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000168275000011 L2 - epilepsy;hippocampus;mossy fibres;rat;synaptic plasticity;INTRAHIPPOCAMPAL TETANUS TOXIN; GLUTAMIC-ACID DECARBOXYLASE; RAT ENTORHINAL CORTEX; HIPPOCAMPUS IN-VITRO; GRANULE CELLS; EPILEPTIFORM ACTIVITY; MESSENGER-RNA; SYNAPTIC REORGANIZATION; EXPERIMENTAL EPILEPSY; INCREASED EXPRESSION SO - European Journal of Neuroscience 2001 ;13(7):1371-1379 3136 UI - 11634 AU - Guz AN AU - Zozulya VV AD - Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, Kiev, UkraineCtr Invest Cient YucatanAC, Merida, Yucatan, MexicoGuz, AN, Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, Kiev, Ukraine TI - Fracture dynamics with allowance for crack edge contact interaction AB - In this review article general results are presented concerning problems in the fracture dynamics of elastic bodies with allowance for unilateral crack edge contact interaction with friction.. A formulation has been made of the elastodynamic contact problem with unilateral restrictions for bodies with cracks under arbitrary dynamic loading. A specific case of harmonic loading important to these applications has also been considered. The mathematical aspects of the elastodynamics problem for bodies with cracks and with unilateral restrictions in the form of inequalities on the crack edges have been considered in brief A variational formulation of the problem has been given. Boundary variational inequalities and boundary functionals have been derived. The boundary integral equations (BIE) method in a Laplace transform domain has been used as a solution for the elastodynamic problem for bodies with cracks, Singularities of the kernels in these integral equations have been studied. Two regularization methods of the potentials with "strongly" singular kernels have been considered. The first is based on its transformation into integro-differentional equations. The second consists of the utilization of the BIE with hypersingular integrals, which are considered in the sense of a finite part, according to Hadamard. An algorithm for die solution of the elastodynamic unilateral contact problem for bodies with cracks has been elaborated, The algorithm is based on finding a saddle point of a sub-differentional boundary functional. It has been shown that die algorithm may be considered as a compressive operator, which acts in corresponding functional spaces. This means that the algorithm is convergent. Numerical methods have been elaborated for the solution to elastodynamic contact problems with unilateral restrictions and friction for bodies with cracks. The problem has been solved. for plane harmonic tension-compression wave propagation in a plane with one and two colinear finite length cracks and with allowance for unilateral contact interaction of the crack edges. Dependence of the solution accuracy on die approximation of coordinates and time, and also of numbers of terms in die expansion of the stress-strain state components into Fourier series, has been investigated. Numerical results have also been presented. Quantitative and qualitative effects caused by contact interaction of the crack edges have been investigated. This review contains 170 references MH - Mexico|Yucatan MH - Ukraine PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 17 U4 - Engineering, Multidisciplinary;Mathematics, Applied;Mechanics;Physics, Mathematical U5 - J;Review AV - English IS - 1565-1339 UR - ISI:000174287800001 L2 - elastodynamics;fracture mechanics;unilateral contact;friction;FINITE-PART INTEGRALS; HEMIVARIATIONAL INEQUALITIES; HYPERSINGULAR INTEGRALS; NUMERICAL INVERSION; MULTIPLE SOLUTIONS; MECHANICS; PLANE; ELASTICITY; ELASTODYNAMICS; EQUATIONS SO - International Journal of Nonlinear Sciences and Numerical Simulation 2001 ;2(3):173-233 3137 UI - 14039 AU - Guzman-Davalos L AU - Ovrebo CL AD - Univ Guadalajara, Inst Bot, Zapopan 45110, Jalisco, MexicoUniv Cent Oklahoma, Dept Biol, Edmond, OK 73034, USAGuzman-Davalos, L, Univ Guadalajara, Inst Bot, Apdo Postal 1-139, Zapopan 45110, Jalisco, Mexico TI - Some species of Gymnopilus from Costa Rica and Panama AB - Three species of Gymnopilus are recorded for the first time from Central America. Gymnopilus crassitunicatus, collected in a Quercus forest in costa Pica, is described as new. It differs from other species of the genus by its strongly verrucose spores with warts embedded in a perisporium, thick-walled pleurocystidia and caulocystidia, and hyphae from hymenophoral trama with pigment-encrusted walls. Gymnopilus robustus and G, rugulosus were described from Mexico. The former is now reported from Costa Pica and Panama, and the latter from Costa Pica. It is probable that both species are very common in tropical and subtropical Central America MH - Mexico|Jalisco MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 4 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000167653200019 L2 - Agaricales;Annulati;Central America;Cortinariaceae SO - Mycologia 2001 ;93(2):398-404 3138 UI - 14527 AU - Guzman-Marin R AU - Alam MN AU - Mihailescu S AU - Szymusiak R AU - McGinty D AU - Drucker-Colin R AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoVet Affairs Greater Los Angeles HealthCare Syst, N Hills, CA 91343, USAUniv Calif Los Angeles, Dept Psychol, Los Angeles, CA, USAUniv Calif Los Angeles, Sch Med, Dept Med, Los Angeles, CA, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoDrucker-Colin, R, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Fac Med, Dept Fisiol, AP 70-250, Mexico City 04510, DF, Mexico TI - Subcutaneous administration of nicotine changes dorsal raphe serotonergic neurons discharge rate during REM sleep AB - In the present study nicotine (0.1 mg/kg, s.c.) increased discharge rate of putative dorsal raphe (DRN) serotonergic neurons of behaving rats during REM sleep (362.61%), without any significant change during waking and non-REM sleep. Since serotonergic DRN neurons gate PGO onset, these results suggest that nicotine-induced suppression of PGO spikes during REM sleep previously reported is achieved through stimulation of dorsal raphe serotonergic cells. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000166427900018 L2 - nicotine;serotonergic neuron;dorsal raphe nucleus;REM-off neuron;single-unit recording;DEPRESSION; RECEPTOR; NUCLEI; CATS SO - Brain Research 2001 ;888(2):321-325 3139 UI - 14058 AU - Guzman-Murillo MA AU - Ruiz-Bustos E AU - Ho B AU - Ascencio F AD - Natl Univ Singapore, Dept Microbiol, Singapore 117597, SingaporeBiol Res Ctr, Marine Pathol Unit, La Paz 23000, Baja Calif Sur, MexicoAscencio, F, Natl Univ Singapore, Dept Microbiol, MD4-A,Sci Dr 2, Singapore 117597, Singapore TI - Involvement of the heparan sulphate-binding proteins of Helicobacter pylori in its adherence to HeLaS3 and Kato III cell lines AB - To determine whether Helicobacter pylori heparan sulphate-binding proteins (HSBPs) are involved in the adherence of H. pylori to HeLa and Kato III cells, monolayers were pre-incubated with various preparations and concentrations of H, pylori HSBPs at 37 degreesC, washed and then challenged with bacteria. HSBPs did not prevent but enhanced H, pylori adherence. However, challenging cultured cells with H, pylori previously incubated with rabbit anti-HSBP IgG resulted in significant inhibition of bacterial adherence. These data demonstrate that the extracellular HSBP plays an important role in promoting H, pylori attachment to Kato III and HeLa S3 cells, that adhesion of H, pylori to Kato III and HeLa S3 cells is promoted by the presence of the 71.5-kDa extracellular HSBP and that rabbit polyclonal antibodies against this HSBP can inhibit adhesion of H. pylori to the cultured cell lines and detach cell-bound H. pylori MH - Mexico|Baja California Sur MH - Singapore PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0022-2615 UR - ISI:000167651500004 L2 - HIGH-AFFINITY BINDING; SULFATE-BINDING; GASTRIC-CANCER; ADHESION; INFECTION; MUCIN; HOST; IDENTIFICATION; PURIFICATION; EXPRESSION SO - Journal of Medical Microbiology 2001 ;50(4):320-329 3140 UI - 12662 AU - Guzman A AU - Zocholl S AU - Benmouyal G AU - Altuve HJ AD - Schweitzer Engn Labs, Pullman, WA, USAUniv Autonoma Nuevo Leon, Monterrey, NL, MexicoGuzman, A, Schweitzer Engn Labs, Pullman, WA, USA TI - A current-based solution for transformer differential protection - Part I: Problem statement AB - This paper analyzes the problem of transformer differential protection. First, we review the concept of transformer differential protection. We then analyze magnetizing inrush, overexcitation, and current transformer (CT) saturation phenomena as possible causes of relay misoperation. Finally, we summarize the existing methods for discriminating internal faults from inrush and overexcitation conditions. In Part II of the paper, we propose a new approach for transformer differential protection and describe the relay that is based on this approach MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 16 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000171542300008 L2 - differential protection;power transformer protection;protective relaying SO - Ieee Transactions on Power Delivery 2001 ;16(4):485-491 3141 UI - 13504 AU - Guzman G AU - Moron MA AU - Ramirez-Guillen F AU - Wolf JHD AD - Inst Ecol, Xalapa 91000, Veracruz, MexicoUniv Amsterdam, Inst Biodivers & Ecosys Dynam, NL-1098 SM Amsterdam, NetherlandsGuzman, G, Inst Ecol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Entomogenous Cordyceps and related genera from Mexico with discussions on their hosts and new records AB - Fifteen species of Cordyceps (Ascomycotina, Hypocreales, Clavicipitaceae) and related genera and their anamorphs parasitic on insects have been recorded from Mexico, of which Cordyceps dipterigena (from the State of Veracruz in a subtropical humid forest on flies of the genus Eucalliphora) and C. pruinosa (from Quintana Roo in a tropical rain forest on an unknown host) are first reported for the country. Cordyceps militaris presents the broadest distribution in the country. The confusion between C. gracilis and C. entomorrhiza is discussed. Cordyceps melolonthae var. rickii only previously known from Chiapas, is now reported from two new localities in Chiapas, and from the States of Oaxaca and Veracruz; in Oaxaca and Chiapas on larvae of Enema endymion, and in Veracruz on larvae of Strategus aloeus (both Coleoptera, Melolonthidae, subfam. Dynastinae, tribus Oryctini) MH - Mexico|Veracruz MH - Netherlands PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000169237400010 L2 - Cordyceps dipterigena;C. pruinosa;C. melolonthae var. rickii SO - Mycotaxon 2001 ;78():115-125 3142 UI - 13016 AU - Hafner DJ AU - Riddle BR AU - varez-Castaneda ST AD - New Mexico Museum Nat Hist, Albuquerque, NM 87104, USAUniv Nevada, Dept Biol Sci, Las Vegas, NV 89154, USACtr Invest Biol Noroeste, La Paz 23090, Baja Calif Sur, MexicoHafner, DJ, New Mexico Museum Nat Hist, 1801 Mt Rd NW, Albuquerque, NM 87104 USA TI - Evolutionary relationships of white-footed mice (Peromyscus) on islands in the Sea of Cortez, Mexico AB - Sixteen populations of Peromyscus on islands in the Sea of Cortez (= Gulf of California), Mexico, were compared with 9 mainland species of Peromyscus based on sequence data for a 699-base-pair fragment of the mitochondrial DNA (mtDNA) COIII gene. An unrooted neighbor-joining tree based on corrected pairwise estimates of sequence divergence among variable mtDNA haplotypes indicated a recent (late Pleistocene) origin from a source on the adjacent mainland for 10 island forms representing P. boylii, P. crinitus, P. eremicus, P. eva, P. fraterculus, and P. maniculatus. Five other populations did not seem to be derived from species currently on the nearest mainland, suggesting overwater dispersal or distributional changes on the mainland after drowning of land-bridge connections. One population, possibly of more ancient origin, on Isla Cerralvo near the Baja California peninsula, probably originated via trans-Gulf rafting from the Sonoran mainland. Based on these results, 4 insular species (P. stephani, P. interparietalis, P. caniceps, and P. dickeyi) should be considered subspecies of P. boylii, P. eremicus, P. fraterculus, and P. merriami, respectively. The emergent view of evolutionary relationships within the subgenus Haplomylomys in the region reflects pre-Pleistocene phylogeographic events on the mainland surrounding the Gulf and a more recent origin of island populations MH - USA MH - Mexico|Baja California Sur PB - PROVO: AMER SOC MAMMALOGISTS RP - NOT IN FILE U3 - TC 10 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000170597600014 L2 - Haplomylomys;island biogeography;mitochondrial DNA;Peromyscus;Sea of Cortez;EREMICUS SPECIES GROUP; BIOCHEMICAL POLYMORPHISM; GENUS PEROMYSCUS; MITOCHONDRIAL-DNA; SYSTEMATICS; CHAETODIPUS; PHYLOGEOGRAPHY; BIOGEOGRAPHY; DESERT SO - Journal of Mammalogy 2001 ;82(3):775-790 3143 UI - 12426 AU - Halfar J AU - Nava-Sanchez EH AD - Univ Stuttgart, Inst Geol & Palaontol, D-70174 Stuttgart, GermanyCICIMAR, Dept Oceanol, La Paz 23000, Baja Calif Sur, MexicoHalfar, J, Univ Stuttgart, Inst Geol & Palaontol, Herdweg 51, D-70174 Stuttgart, Germany TI - Sedimentation and tectonics along a rift basin margin: The Gulf of California convened at the 1998 fall meeting of the American Geophysical Union, December 1998 - (San Francisco, Ca) - Preface MH - Germany MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geology U5 - J;Editorial Material AV - English IS - 0037-0738 UR - ISI:000171968500001 SO - Sedimentary Geology 2001 ;144(1-2):1-3 3144 UI - 12428 AU - Halfar J AU - Godinez-Orta L AU - Goodfriend GA AU - Mucciarone DA AU - Ingle JC AU - Holden P AD - Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305, USACtr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja Calif Sur, MexicoGeorge Washington Univ, Dept Earth & Environm Sci, Washington, DC 20052, USAUniv Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064, USAHalfar, J, Univ Stuttgart, Inst Geol & Palaontol, Herdweg 51, D-70174 Stuttgart, Germany TI - Holocene-late Pleistocene non-tropical carbonate sediments and tectonic history of the western rift basin margin of the southern Gulf of California AB - Using high-resolution seismic reflection profiling and dating of (1) shallow marine vibracores and (2) sediments collected from uplifted marine terraces we reconstruct the tectonic history and sediment accumulation patterns of Holocene to late Pleistocene warm-temperate to subtropical carbonates in the southern Gulf of California, Mexico. The study was conducted in the vicinity of La Paz where carbonates form along the fault bounded narrow western shelf of the tectonically active Gulf of California rift basin. The non-tropical nature of the setting is responsible for (1) poor cementation of the bioclastic carbonates, and (2) a composition which is dominated by rhodoliths (coralline red algae), corals and mollusks. Unrimmed carbonate flats forming in small pocket bays and a rhodolith bioherm, which has a surface area of more than 20 km(2) and is up to 16 m thick, constitute the major carbonate factories. Holocene carbonate accumulation rates were deduced from seismic and core data and are highest on the rhodolith bioherm (260 cm/ka) and in subtidal zones of pocket bays (210 cm/ka), and lowest on the inner and middle shelf (100 cm/ka). Taken together, rates of carbonate accumulation are intermediate in magnitude between higher rates recorded in fully tropical carbonate settings and lower rates typical of cool-water carbonates. Seismic reflection profiles demonstrate that Isla Espiritu Santo in the center of the study area is a west dipping fault block, which is tectonically influenced by two distinct faults., the La Paz and Espiritu Santo faults. The latter fault accommodates at least 700 rn of east-side down normal offset. and forms a steep eastern escarpment leading into the La Paz slope basin. Some of the sediments produced in the shallow carbonate factories of the narrow La Paz shelf are transported across this escarpment and are redeposited in the slope basin at a water depth of 750 m. Uranium-series dates of marine terraces exposed on Isla Espiritu Santo indicate that late Pleistocene uplift along the eastern side of the island could be as high as 310 mm/ka whereas downdropping along the western side of the island occurred at a rate of up to 15 mm/ka. Isla Espiritu Santo therefore constitutes part of the uplifted shoulder of the western margin of the Gulf of California rift basin. Patterns of vertical tectonic movements of Isla Espiritu Santo together with fault offsets on the surrounding seafloor and slump features on steep submarine slopes, point to continuous activity of the La Paz and Espiritu Santo faults. Results of this study will assist in recognizing and interpreting similar settings along ancient non-tropical rift basin margins worldwide and especially in the Neogene of the Gulf of California. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000171968500008 L2 - Gulf of California;non-tropical carbonates;accumulation rates;high-resolution seismic reflection profiles resedimentation;BAJA-CALIFORNIA; OF-CALIFORNIA; SOUTHWEST AUSTRALIA; MASS-SPECTROMETRY; MEXICO; SHELF; REEFS; AGES; ENVIRONMENTS; PLATFORMS SO - Sedimentary Geology 2001 ;144(1-2):149-178 3145 UI - 13503 AU - Halhali A AU - Wimalawansa SJ AU - Berentsen V AU - Avila E AU - Thota CS AU - Larrea F AD - Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoUniv Texas, Med Branch, Dept Internal Med, Galveston, TX 77550, USAHalhali, A, Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Vasco de Quiroga No 15,Col Tlalpan, Mexico City 14000, DF, Mexico TI - Calcitonin gene- and parathyroid hormone-related peptides in preeclampsia: Effects of magnesium sulfate AB - Objective: To determine whether circulating levels of calcitonin gene-related peptide (CGRP) and parathyroid hormone-related peptide (PTHrP) are altered in preeclampsia, and to assess the effects of magnesium sulfate therapy on circulating levels of these two peptides. Methods: The study population included 25 women with preeclampsia and 25 normotensive controls of similar gestational age. The effects of magnesium sulfate therapy were evaluated in 17 of the 25 preeclamptic women. Circulating levels of immunoreactive CGRP and PTHrP, including calcium, magnesium, and phosphate in the maternal and umbilical cord serum were measured. Results: The frequency of preeclampsia subjects with nondetectable PTHrP (under 3 pg/mL) was significantly higher (92% versus 48%, P < .001), whereas maternal serum CGRP levels were significantly lower (50 +/- 19 versus 90 +/- 23 pg/mL, P < .001). Similarly, the frequency of newborns with nondetectable PTHrP levels in umbilical serum was significantly higher (68% versus 36%, P < .05), whereas the levels of CGRP were significantly lower (67 +/- 17 versus 79 +/- 16 pg/mL, P < .05). Magnesium sulfate treatment resulted in a significant increase in maternal circulating CGRP levels (64 +/- 17 versus 47 +/- 18 pg/mL, P < .05) with no changes in PTHrP. Conclusion: Maternal circulating PTHrP and CGRP concentrations were significantly lower in women with preeclampsia, which may contribute to the development and maintenance of hypertension during pregnancy. Furthermore, magnesium sulfate therapy increased the levels of CGRP in the maternal circulation. (Obstet Gynecol 2001;97: 893-7. (C) 2001 by The American College of Obstetricians and Gynecologists.) MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 14 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0029-7844 UR - ISI:000169206300006 L2 - ARGININE METHYL-ESTER; FETAL-PLACENTAL CIRCULATION; GROWTH-FACTOR-I; INDUCED HYPERTENSION; CALCIUM-METABOLISM; PREGNANCY; PROTEIN; RATS; 1,25-DIHYDROXYVITAMIN-D; RESPONSES SO - Obstetrics and Gynecology 2001 ;97(6):893-897 3146 UI - 12814 AU - Hany TF AU - Carroll TJ AU - Omary RA AU - Eparza-Coss E AU - Korosec FR AU - Mistretta CA AU - Grist TM AD - Univ Wisconsin, Clin Sci Ctr E3 311, Dept Med Phys, Madison, WI 53792, USAUniv Wisconsin, Clin Sci Ctr E3 311, Dept Radiol, Madison, WI 53792, USACtr Invest & Estudios Avanzados, Dept Phys, Mexico City, DF, MexicoCINVESTAV, Mexico City 14000, DF, MexicoNorthwestern Univ, Dept Radiol, Chicago, IL 60611, USACarroll, TJ, Univ Wisconsin, Clin Sci Ctr E3 311, Dept Med Phys, 600 Highland Ave, Madison, WI 53792 USA TI - Aorta and runoff vessels: Single-injection MR angiography with automated table movement compared with multiinjection time-resolved MR angiography - Initial results AB - The authors compared two techniques for performing runoff, contrast material-enhanced magnetic resonance (MR) angiography. Multiinjection time-resolved imaging of contrast kinetics (TRICKS) and sing le-injection bolus-chase MR angiographic examinations were performed in 10 volunteers and 10 patients. Image quality and venous overlay of the major blood vessels of the abdomen, thigh, and calf were evaluated. Significantly more (P < .05) vessels were depicted with diagnostic quality on multiinjection TRICKS than on single-injection bolus-chase MR angiographic images MH - Mexico|Distrito Federal MH - USA PB - OAK BROOK: RADIOLOGICAL SOC NORTH AMERICA RP - NOT IN FILE U3 - TC 39 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0033-8419 UR - ISI:000171118900038 L2 - aorta, MR;arteries, extremities;magnetic resonance (MR), vascular studies;RENAL-ARTERIES; BREATH-HOLD; OPTIMIZATION; SUBTRACTION SO - Radiology 2001 ;221(1):266-272 3147 UI - 12964 AU - Hart C AU - Hernandez AD AU - Ares O AU - Escudero R AD - Havanna Univ, Superconduct IMRE, Superconduct Lab, Havana 10400, CubaUNAM, Mat Res Inst, Low Temperature Lab, Mexico City, DF, MexicoHart, C, Havanna Univ, Superconduct IMRE, Superconduct Lab, Zapataya YG Vedado, Havana 10400, Cuba TI - Extrinsic magneto resistance in La2/3Ca1/3MnO3 thick films AB - Thick films of La0.66Ca0.33MnO3 have been obtained on alumina substrate by the "paint-on" method. They exhibit a clear extrinsic magneto resistance (broad metal-insulator transition with peak temperature lower than Curie temperature, magneto resistance at low temperatures and magnetic fields. etc.). This behavior seems to be related to the competition between tunneling magnetoresistance (TMR) at the grain boundaries and double exchange in the grains. An anomaly is observed in the resistance vs. applied magnetic field at low temperatures. which support the presence of TMR. EDAX analysis performed to the films shows elemental composition deviations near to the grain boundaries. (C) 2001 Published by Elsevier Science B.V MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000170708600330 L2 - manganites;extrinsic magnetoresistance;tunneling magnetoresistance;LOW-FIELD MAGNETORESISTANCE; COLOSSAL MAGNETORESISTANCE; CA SO - Journal of Magnetism and Magnetic Materials 2001 ;226():905-907 3148 UI - 13922 AU - Hartley DJ AU - Galindo-Uribarri A AU - Baktash C AU - Carpenter MP AU - Danchev M AU - Devlin M AU - Gross CJ AU - Janssens RVF AU - Lipoglavsek M AU - Padilla E AU - Paul SD AU - Radford DC AU - Reviol W AU - Riedinger LL AU - Sarantites DG AU - Seweryniak D AU - Yu CH AU - Zeidan O AD - Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAArgonne Natl Lab, Div Phys, Argonne, IL 60439, USAWashington Univ, Dept Chem, St Louis, MO 63130, USAOak Ridge Inst Sci & Educ, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSt Kliment Ohridsky Univ Sofia, Fac Phys, BG-1164 Sofia, BulgariaHartley, DJ, Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA TI - First evidence of excited states in the near-drip-line nucleus Pr-126 and signature inversion in A approximate to 130 nuclei AB - gamma -ray transitions have been identified for the first time in the near-drip-line nucleus Pr-126, making it the lightest odd-odd praseodymium nucleus in which excited states have been reported. Evidence is presented for two rotational bands in Pr-126, one strongly coupled and the other doubly decoupled. In addition, the preliminary reports of a band in Pr-128 are confirmed. The signature inversion phenomenon and trends in the energy staggering of the pih(11/2)nuh(11/2) bands are discussed for the Cs, La, and Pr nuclei MH - Bulgaria MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000168059900001 L2 - ODD-ODD NUCLEI; ROTATIONAL BANDS; SPECTROSCOPY; TRIAXIALITY SO - Physical Review C 2001 ;6304(4): 3149 UI - 12265 AU - Hartmann L AU - Ballesteros-Paredes J AU - Bergin EA AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAAmer Museum Nat Hist, New York, NY 10024, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoHartmann, L, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - Rapid formation of molecular clouds and stars in the solar neighborhood AB - We show how molecular clouds in the solar neighborhood might be formed and produce stars rapidly enough to explain stellar population ages, building on results from numerical simulations of the turbulent interstellar medium and general considerations of molecular gas formation. Observations of both star-forming regions and young, gas-free stellar associations indicate that most nearby molecular clouds form stars only over a short time span before dispersal; large-scale flows in the diffuse interstellar medium have the potential for forming clouds sufficiently rapidly and for producing stellar populations with ages much less than the lateral crossing times of their host molecular clouds. We identify four important factors for understanding rapid star formation and short cloud lifetimes. First, much of the accumulation and dispersal of clouds near the solar circle might occur in the atomic phase; only the high-density portion of a cloud's life cycle is spent in the molecular phase, thus helping to limit molecular cloud "lifetimes." Second, once a cloud achieves a high enough column density to form H-2 and CO, gravitational forces become larger than typical interstellar pressure forces; thus, star formation can follow rapidly upon molecular gas formation and turbulent dissipation in limited areas of each cloud complex. Third, typical magnetic fields are not strong enough to prevent rapid cloud formation and gravitational collapse. Fourth, rapid dispersal of gas by newly formed stars, passing shock waves, and reduction of shielding by a small expansion of the cloud after the first events of star formation might limit the length of the star formation epoch and the lifetime of a cloud in its molecular state. This picture emphasizes the importance of large-scale boundary conditions for understanding molecular cloud formation and implies that star formation is a highly dynamic, rather than quasi-static, process and that the low Galactic star formation rate is due to low efficiency rather than slowed collapse in local regions MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 136 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-637X UR - ISI:000172572600024 L2 - circumstellar matter;ISM : clouds;stars : formation;stars : pre-main-sequence;T-TAURI STARS; ETA-CHAMAELEONTIS CLUSTER; SHOCK-COMPRESSED LAYERS; LARGE-SCALE STRUCTURE; MAIN-SEQUENCE TRACKS; AURIGA DARK CLOUDS; INTERSTELLAR-MEDIUM; PHOTODISSOCIATION REGIONS; OB ASSOCIATION; MAGNETIC-FIELDS SO - Astrophysical Journal 2001 ;562(2):852-868 3150 UI - 12665 AU - Hassanein TI AU - Cooksley G AU - Sulkowski M AU - Smith C AU - Marinos G AU - Lai MY AU - Pastore G AU - Trejo-Estrada R AU - Vale AHE AU - Lok AS AU - Lin A AU - Green J AD - Univ Calif San Diego, San Diego, CA 92103, USARoyal Brisbane Hosp, Herston, Qld, AustraliaJohns Hopkins Univ, Baltimore, MD, USAMinnesota Clin Res Ctr, St Paul, MN, USAPrince Wales Hosp, Randwick, NSW 2031, AustraliaNatl Taiwan Univ Hosp, Taipei, TaiwanUniv Policlin, Bari, ItalyCtr Med Nacl Siglo XXI, Mexico City, DF, MexicoClin Diagnost Med Integral, Vila Nova De Gaia, PortugalUniv Michigan, Ann Arbor, MI 48109, USAHoffmann La Roche Inc, Nutley, NJ 07110, USA TI - Treatment with 40 kDa peginterferon alfa-2a (PEGASYS (R)) in combination with ribavirin significantly enhances quality of life compared with interferon alfa-2b plus ribavirin MH - Australia MH - Italy MH - Mexico|Distrito Federal MH - Portugal MH - Taiwan MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 6 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000171224700280 SO - Hepatology 2001 ;34(4):243A-243A 3151 UI - 14378 AU - Hauxwell J AU - Cebrian J AU - Herrera-Silveira JA AU - Ramirez J AU - Zaldivar A AU - Gomez N AU - randa-Cirerol N AD - Boston Univ, Marine Program, Marine Biol Lab, Woods Hole, MA 02543, USADauphin Isl Sea Lab, Dauphin Island, AL 36528, USAUniv Merida, IPN, CINVESTAV, Merida, Yucatan, MexicoHauxwell, J, Univ Florida, Dept Zool, POB 118525, Gainesville, FL 32611 USA TI - Measuring production of Halodule wrightii: additional evidence suggests clipping underestimates growth rate AB - Growth rates of Halodule wrightii determined using the traditional method of clipping and reharvesting were compared to those determined using the hole-punching method in four populations distributed in coastal lagoons of the Yucatan peninsula, Mexico. For three of the four populations, clipped shoots revealed 38-56% lower growth rates than punched shoots. The decrease in leaf production per shoot and on an areal basis in clipped shoots compared to punched shoots resulted from generally lower new leaf length, and, of equal or greater importance, leaf width of these shoots. Thus, the clip and reharvest method for assessing H. wrightii leaf production yielded underestimates. Leaf-punching is a convenient method in populations characterized by relatively broad leaves, such as those in Yucatan lagoons. From these populations, the highest published values for leaf elongation rates of H, wrightii to date (11.7-20.6 mm shoot(-1) d(-1)) and summer areal production rates of 4.2-5.8 g dw m(-2) d(-1). Long-term production data for this species are crucial for managing subtropical coastal environments. Because contrasting methods have been employed to estimate the growth of H. wrightii, spatial and temporal comparisons of production from published reports are difficult to make, and a unified robust method for estimating growth rates and areal production of this seagrass is needed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000166858600004 L2 - Halodule wrightii;seagrass;production;growth;density;width;Yucatan;SYRINGODIUM-FILIFORME; THALASSIA-TESTUDINUM; LIGHT REDUCTION; SEAGRASSES; ESTUARIES; BIOMASS; MACROPHYTES; PATTERNS; ASCHERS; LIMIT SO - Aquatic Botany 2001 ;69(1):41-54 3152 UI - 13178 AU - Hay BP AU - Dixon DA AU - Vargas R AU - Garza J AU - Raymond KN AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Dept Quim, Mexico City 09340, DF, MexicoUniv Calif Berkeley, Dept Chem, Berkeley, CA 94720, USAHay, BP, Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - Structural criteria for the rational design of selective ligands. 3. Quantitative structure-stability relationship for iron(III) complexation by tris-catecholamide siderophores AB - We present an extended MM3 model for catecholamide ligands and their Fe3+ complexes and the application of this model to understand how ligand architecture effects Fe3+ binding affinity. Force field parameters were fit to geometries and energies from electronic structure calculations, and to crystal structure data. Optimized geometries are reported for phenol, acetamide, the phenol-phenol dimer, the acetamide -phenol dimer, and N-methylsalicylamide (HMSA) at the BLYP/DZVP2/A2 level of theory. Optimized geometries and relative energies are reported for the pseudo-octahedral ground state and the trigonal planar transition state of [Fe(CAT)(3)](3-) at the VWN/.DZVP2/Al level of theory. The MM3 model is validated by comparison of calculated structures with crystal structures containing 1,2-dihydroxybenzene (H(2)CAT) and 2,3-dihydroxy-N-methylbenzamide (H(2)MBA) fragments, crystal structures of [Fe(CAT)(3)](3-) and tris-catecholamide Fe3+ complexes, and comparison of MM3 (6.8 kcal/ mol) and VWN (5.9 kcal/mol) barriers for intramolecular octahedral inversion in [Fe(CAT)(3)](3-). The MM3 model also rationalizes the higher inversion barrier (14 to 18 kcal/mol) reported for [Ga(NN-diisopropylterephthalamide)(3)](3)([Ga(DIPTA)(3)](3-)). Conformational searches were performed on enterobactin (H6ENT), 1,3,5-tris(2,3-dihydroxy-benzamidomethyl)-2,4,6-triethylbenzene (H(6)EMECAM), 1,3,5-tris(2,3-dihydroxybenzamidomethyl)-2,4,6-trimethylbenzene (H(6)MMECAM), 1,3,5-tris(2,3-dihydroxybenzamidomethyl)benzene (H(6)MECAM), and 1,5,9-N,N',N'-tris(2,3-dihydroxybenzoyl)cyclotriazatridecane (H-6-3,3,4-CYCAM) and Fe3+ complexes with each of these ligands. A conformational search also was done on the Fe3+ complex with the 2,2',2"-tris(2,3-dihydroxybenzamido)triethylammonium cation (H(7)TRENCAM(+)). The relationship between calculated steric energies and measured thermodynamic quantities is discussed, and linear correlations between formation constants and steric energy differences are reported. Extrapolation to zero strain predicts formation constants 8 +/- 5 orders of magnitude higher than that exhibited by ENT (10(49)) are possible. This prediction is supported by a formation constant of 10(63) estimated from the formation constant of [Fe(2,3-dihydroxy-N,N-dimethylbenzamide)(3)](3-) ([Fe(DMBA)(3)](3-)) by considering the entropic consequences of connecting three DMBA ligands to a rigid backbone. Structural criteria for the identification of improved tris-catecholate ligand architectures are presented MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 32 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0020-1669 UR - ISI:000170199100013 L2 - IRON TRANSPORT COMPOUNDS; MM3 FORCE-FIELD; ION SEQUESTERING AGENTS; HOST GUEST COMPLEXATION; ALKALINE-EARTH CATIONS; MOLECULAR MECHANICS; COORDINATION CHEMISTRY; CONFORMATIONAL-ANALYSIS; CROWN-ETHERS; ENTEROBACTIN COMPLEX SO - Inorganic Chemistry 2001 ;40(16):3922-3935 3153 UI - 12112 AU - Hayashi N AU - Kaikina EI AU - Paredes HFR AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoInst Tecnol Morelia, Programa Grad Elect, Morelia 58120, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - Boundary-value problem for the Korteweg-de Vries-Burgers type equation AB - We study the following initial-boundary value problem for the Korteweg-de Vries-Burgers equation on half-line u(t) + u(x)(2) - u(xx) + u(xxx) = 0, (x, t) is an element of R+ x R+, {u(x, 0) = u(0)(x), x is an element of R+, (1) u(0, t) = 0, t is an element of R+. We prove that if the initial data u(0) is an element of X, and the norm \\u(0)\\x is sufficiently small, where X = {phi is an element of L-1 boolean AND H-1; \\phi\\x = \\phi\\(L1) + \\phi\\(H1) < infinity}, then there exists a unique solution u is an element of C([0,infinity); H-1) of the initial-boundary value problem (1), where H-k is the Sobolev space with norm \\phi\\(Hk) = \\(1 - partial derivative (2)(x)) (k/2)phi\\(L2). We also find the large time asymptotics of the solutions under the condition x(1+delta)u is an element of L-1 boolean AND L-2 with delta is an element of (0, 1). More pricesely, we prove u(x, t) = A/te(-x2/4t)x/2 roott + O(min(1, x/2 roott)t(-1-delta /2)), where A will be defined below in Theorem 2 MH - Japan MH - Mexico|Michoacan PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1021-9722 UR - ISI:000172795500005 L2 - boundary value problems;Korteweg-de Vries-Burgers equation;DISSIPATION; TIME SO - Nodea-Nonlinear Differential Equations and Applications 2001 ;8(4):439-463 3154 UI - 12314 AU - Hayashi N AU - Naumkin PI AU - Yamazaki Y AD - Sci Univ Tokyo, Dept Appl Math, Tokyo 1628601, JapanUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, Japan TI - Large time behavior of small solutions to subcritical derivative nonlinear Schrodinger equations AB - We consider the derivative nonlinear Schrodinger equations {iu(t) + 1/2 u(xx) = a(t)F(u, u(x)), (t,x) is an element of R-2, u(0,x) = epsilonu(o)(x), x is an element of R, where the coefficient a (t) satisfies the time growth condition \a(t)\ less than or equal to C(1 + \t\)(1-delta), 0 < < 1, is a sufficiently small constant and the nonlinear interaction term F consists of cubic nonlinearities of derivative type F(u, u(x)) = lambda (1)\u\(2) u + i lambda (2)\u\(2) u(x) + i lambda (3)u(2)(u) over bar (x) + lambda (4)\u(x)\(2) u + lambda (5)(u) over baru(x)(2) + i lambda (6)\u(x)\(2) u(x), where lambda (1), lambda (6) is an element of R, lambda (2), lambda (3), lambda (4), lambda (5) is an element of C, lambda (2) - lambda (3) is an element of R, and lambda (4) - lambda (5) is an element of R. We suppose that the initial data satifsfy the exponential decay conditions. Then we prove the sharp decay estimate parallel tou(t)parallel toL(p) less than or equal to C epsilont 1/p - 1/2, for all t greater than or equal to 1, where 2 less than or equal to p less than or equal to infinity. Furthermore we show that for 1/2 < < 1 there exist the usual scattering states, when b(x) = (1) - (lambda (2)-lambda (3)) x +(lambda (4) - lambda (5)) x(2) - lambda (6)x(3) = 0, and the modified scattering states, when b(x) not equal 0 MH - Japan MH - Mexico|Michoacan PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000172282300026 L2 - subcritical nonlinear Schrodinger equations;large time asymptotics;scattering problem;LONG-RANGE SCATTERING; LINEAR EVOLUTION-EQUATIONS; MODIFIED WAVE-OPERATORS; ANALYTIC SOLUTIONS; HARTREE-EQUATIONS; GLOBAL EXISTENCE; SPACE DIMENSION; ASYMPTOTICS SO - Proceedings of the American Mathematical Society 2001 ;130(3):779-789 3155 UI - 13915 AU - Hayashi N AU - Naumkin PI AD - Sci Univ Tokyo, Dept Appl Math, Tokyo 1628601, JapanUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, Japan TI - Global existence of small solutions to the quadratic nonlinear Schrodinger equations in two space dimensions AB - We study a global existence in time of small solutions to the quadratic nonlinear Schrodinger equation in two space dimensions, (0.1) [GRAPHICS] where [GRAPHICS] lambda (j)k, mu (j)k is an element of C. We prove that if the initial data u 0 satisfy some analyticity and smallness conditions in a suitable norm, then the solution of the Cauchy problem (0.1) exists globally in time. Furthermore we prove the existence of the usual scattering states MH - Japan MH - Mexico|Michoacan PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0036-1410 UR - ISI:000168038600012 L2 - nonlinear Schrodinger equations;global existence;quadratic nonlinearities;two spatial dimensions;LINEAR EVOLUTION-EQUATIONS SO - Siam Journal on Mathematical Analysis 2001 ;32(6):1390-1403 3156 UI - 12528 AU - Head E AU - Garzon-Rodriguez W AU - Johnson JK AU - Lott IT AU - Cotman CW AU - Glabe C AD - Univ Calif Irvine, Inst Brain Aging & Dementia, Irvine, CA 92697, USAUniv Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Calif Irvine, Dept Pediat, Mental Retardat Ctr, Irvine, CA 92697, USAHead, E, Univ Calif Irvine, Inst Brain Aging & Dementia, Irvine, CA 92697 USA TI - Oxidation of a beta and plaque biogenesis in Alzheimer's disease and Down syndrome AB - The processes involved with beta -amyloid (A beta) degradation and clearance in human brain are not well understood. We hypothesized that the distribution of oxidatively modified A beta, as determined by an affinity-purified antibody in the entorhinal and frontal cortices of Alzheimer's disease (AD), Down syndrome (DS), nondemented elderly control cases, and canine brain, would provide insight into the mechanisms of A beta accumulation. Based upon plaque counts, oxidized A beta was present within 46-48% of diffuse and primitive plaques and 98% of cored plaques. Dense punctate deposits of oxidized A beta were distributed throughout the neuropil in AD and DS brains but were also present within controls with mild neuropathology and isolated cognitive impairments. Confocal studies indicate that punctate oxidized A beta deposits were within activated microglia. Oxidatively modified A beta may reflect the efforts of microglial cells to take up and degrade A beta. Oxidative modification of A beta may be an early event in A beta pathogenesis and may be important for plaque biogenesis. (C) 2001 Academic Press MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 25 U4 - Neurosciences U5 - J;Article AV - English IS - 0969-9961 UR - ISI:000171828100006 L2 - Alzheimer's disease;amyloid;brain aging;canine;Down syndrome;microglia;oxidative damage;AMYLOID PRECURSOR PROTEIN; INTRACELLULAR ACCUMULATION; TERMINAL HETEROGENEITY; AGGREGATION PROPERTIES; SCAVENGER RECEPTOR; TRANSFECTED CELLS; MICROGLIAL CELLS; SENILE PLAQUES; BRAIN-TISSUE; IN-VITRO SO - Neurobiology of Disease 2001 ;8(5):792-806 3157 UI - 13921 AU - Hennino R AU - Tregoures N AU - Shapiro NM AU - Margerin L AU - Campillo M AU - van Tiggelen BA AU - Weaver RL AD - Univ Grenoble 1, CNRS, Lab Phys & Modelisat Milieux Condenses, F-38042 Grenoble 09, FranceUniv Grenoble 1, Observ Grenoble, Lab Geophys Interne & Tectonophys, F-38041 Grenoble, FranceNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoPrinceton Univ, Dept Geosci, Princeton, NJ 08544, USAUniv Illinois, Dept Theoret & Appl Mech, Urbana, IL 61801, USAvan Tiggelen, BA, Univ Grenoble 1, CNRS, Lab Phys & Modelisat Milieux Condenses, BP 166, F-38042 Grenoble 09, France TI - Observation of equipartition of seismic waves AB - Equipartition is a first principle in wave transport, based on the tendency of multiple scattering to homogenize phase space. We report observations of this principle for seismic waves created by earthquakes in Mexico. We find qualitative agreement with an equipartition model that accounts for mode conversions at the Earth's surface MH - France MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 49 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168045700058 L2 - NEMATIC LIQUID-CRYSTALS; MONTE-CARLO SIMULATION; DIFFUSE WAVES; SPONTANEOUS EMISSION; MULTIPLE-SCATTERING; ELASTIC-WAVES; CODA; ENVELOPE; SURFACE; MEDIA SO - Physical Review Letters 2001 ;86(15):3447-3450 3158 UI - 13351 AU - Herbert TD AU - Schuffert JD AU - Andreasen D AU - Heusser L AU - Lyle M AU - Mix A AU - Ravelo AC AU - Stott LD AU - Herguera JC AD - Brown Univ, Dept Geol Sci, Providence, RI 02912, USAUniv Calif Santa Cruz, Santa Cruz, CA 95064, USALamont Doherty Earth Observ, Palisades, NY 10964, USABoise State Univ, Ctr Geophys Invest Shallow Subsurface, Boise, ID 83725, USAOregon State Univ, Corvallis, OR 97331, USAUniv So Calif, Los Angeles, CA 90089, USACtr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoHerbert, TD, Brown Univ, Dept Geol Sci, Providence, RI 02912, USA TI - Collapse of the California Current during glacial maxima linked to climate change on land AB - Time series of alkenone unsaturation indices gathered along the California margin reveal Large (4 degrees to 8 degreesC) glacial-interglacial changes in sea surface temperature (SST) over the past 550,000 years. Interglacial times with SSTs equal to or exceeding that of the Holocene contain peak abundances in the pollen of redwood, the distinctive component of the temperate rainforest of the northwest coast of California. In the region now dominated by the California Current, SSTs warmed 10,000 to 15,000 years in advance of deglaciation at each of the past five glacial maxima. SSTs did not rise in advance of deglaciation south of the modern California Current front. Glacial warming along the California margin therefore is a regional signal of the weakening of the California Current during times when large ice sheets reorganized wind systems over the North Pacific. Both the timing and magnitude of the SST estimates suggest that the Devils Hole (Nevada) calcite record represents regional but not global paleotemperatures, and hence does not pose a fundamental challenge to the orbital ("Milankovitch") theory of the Ice Ages MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 82 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000169780300029 L2 - SEA-SURFACE TEMPERATURE; DEVILS-HOLE; NORTH PACIFIC; INDEX U-37(K'); CURRENT SYSTEM; ICE-AGE; OCEAN; ATLANTIC; RECORD; 42-DEGREES-N SO - Science 2001 ;293(5527):71-76 3159 UI - 13593 AU - Heredia G AU - Reyes M AU - Arias RM AU - Bills GF AD - Merck Res Labs, Nat Prod Drug Discovery, Rahway, NJ 07065, USAAC, Inst Ecol, Xalapa, Veracruz, MexicoBills, GF, Merck Res Labs, Nat Prod Drug Discovery, POB 2000, Rahway, NJ 07065 USA TI - Talaromyces ocotl sp nov and observations on T-rotundus from conifer forest soils of Veracruz State, Mexico AB - Two unusual Talaromyces species were encountered by using heat and chemical pasteurization techniques to survey soil fungi in Pinus hartwegii and Pinus patula forests of the Volcanic Cordillera of Veracruz state, Mexico. Talaromyces ocotl is described as a new species based on morphological analyses and phylogenetic inferences made from ITS and 28S rDNA sequence alignments. The geographic range of Talaromyces rotundus is extended to Mexico and its relationship to other Talaromyces species is investigated based on ITS sequence alignments MH - Mexico|Veracruz MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000168935100013 L2 - ascomycetes;internal transcribed spacers;molecular phylogeny;rDNA sequencing;Sagenomella;soil fungi;Trichocomaceae;SEQUENCE; 18S SO - Mycologia 2001 ;93(3):528-540 3160 UI - 12700 AU - Hermann AM AU - Gonzalez C AU - Ramakrishnan PA AU - Balzar D AU - Popa N AU - Rice P AU - Marshall CH AU - Hilfiker JN AU - Tiwald T AU - Sebastian PJ AU - Calixto ME AU - Bhattacharya RN AD - Univ Colorado, Dept Phys, Boulder, CO 80309, USANatl Inst Stand & Technol, Mat Sci & Engn Lab, Boulder, CO 80303, USALockheed Martin Astronaut, Denver, CO 80201, USAJA Woollam Co Inc, Lincoln, NE 68508, USAUNAM, CIE, Solar Mat Dept, Temixco 62580, Morelos, MexicoNatl Renewable Energy Labs, Golden, CO 80401, USAHermann, AM, Univ Colorado, Dept Phys, Campus Box 390, Boulder, CO 80309 USA TI - Fundamental studies on large area Cu(In,Ga)Se-2 films for high efficiency solar cells AB - This work reports the growth and characterization of thin films of Cu(In,Ga)Se-2 (CIGS), which were grown by sequential sputtering, electrodeposition, and physical vapor deposition. Photovoltaic cells have been fabricated using these films with CdS heterojunction partners and the performance has been characterized. The effect of annealing conditions (temperature and duration) on the CIGS film microstructure and corresponding device performance has been investigated. Structure-property correlations were made using diffraction studies and Rietveld analysis. SEM studies were carried out to understand the effect of microstructure of the CIGS films on the solar cell efficiency. Cell efficiencies in excess of 10% have been achieved by using optimized annealing conditions. In addition, the optical properties of the sputtered CIGS films were characterized using variable angle spectroscopic ellipsometry and sputtered CIGS films were found to have optimum band gap. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000171361800011 L2 - thin films;photovoltaic cells;copper-indium gallium selenide;sputtering;physical vapor deposition;electrodeposition;Rietveld analysis;microstructure;spectroscopic ellipsometry SO - Solar Energy Materials and Solar Cells 2001 ;70(3):345-361 3161 UI - 12898 AU - Hernadez-Avila M AU - Mercado A AU - Tellez-Rojo MM AU - Schnaas L AU - Hu H AD - Natl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca, Morelos, MexicoUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USA TI - Effect of plasma lead levels during pregnancy on gestational age find birthweight MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500196 SO - Epidemiology 2001 ;12(4):S46-S46 3162 UI - 14471 AU - Hernandez-Arriaga J AU - dana-Valenzuela C AU - Iserson KV AD - Univ Guanajuato, Ctr Studies Bioeth, Mexico City, DF, MexicoHosp Ginecopediat, Inst Mexicano Segura Social, Dept Neonatol, Leon, Guanajuato, MexicoUniv Arizona, Coll Med, Program Bioeth, Tucson, AZ 85721, USAUniv Arizona, Coll Med, Bioeth Comm, Tucson, AZ 85721, USAHernandez-Arriaga, J, Univ Guanajuato, Ctr Studies Bioeth, Mexico City, DF, Mexico TI - Jehovah's Witnesses and medical practice in Mexico: Religious freedom, parens patriae, and the right of life MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;Health Policy & Services;Social Sciences, Biomedical U5 - J;Article AV - English IS - 0963-1801 UR - ISI:000166534400004 SO - Cambridge Quarterly of Healthcare Ethics 2001 ;10(1):47-52 3163 UI - 13886 AU - Hernandez-Cobos J AU - Mackie AD AU - Vega LF AD - Univ Rovira & Virgili, Escola Tecn Super Engn Quim, Dept Engn Quim, Tarragona 43006, SpainUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoHernandez-Cobos, J, Univ Rovira & Virgili, Escola Tecn Super Engn Quim, Dept Engn Quim, C Salou S-N, Tarragona 43006, Spain TI - The hydrophobic hydration of methane as a function of temperature from histogram reweighting Monte Carlo simulations AB - A microscopic explanation for the experimental observations of the solvation of methane in water is proposed by way of free energy and structural information estimated using computer simulations. In particular, the temperature dependence of both the free energy of solvation as well as structural information is calculated. The free energy is estimated by reweighting histograms from canonical and grand canonical Monte Carlo simulations along a thermodynamic path. The results for the free energy and structural changes are found to be in qualitative agreement with experimental data. We propose that the decrease in entropy found in the solvation process is brought about by excluded volume effects on mixing the two components rather than any local "freezing" of the water around the methane. At the same time the enthalpy of solvation is determined by the solute-solvent interaction. A weak dependence of the hydration free energy with temperature is found. A possible explanation lies with the relatively low temperature sensitivity of the methane-water radial distribution functions. (C) 2001 American Institute of Physics MH - Mexico|Morelos MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 12 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000168168100026 L2 - DILUTE AQUEOUS-SOLUTION; COMPUTER-SIMULATION; FREE-ENERGY; WATER; DEPENDENCE; MOLECULES; ALKANES; ORIGIN; PAIR SO - Journal of Chemical Physics 2001 ;114(17):7527-7535 3164 UI - 14120 AU - Hernandez-Cordero S AU - Rivera J AU - Villalpando S AU - Gonzalez-Cossio T AU - Neufeld L AU - Ramakrishnan U AU - Martorell R AD - Cornell Univ, Ithaca, NY 14850, USAInst Nacl Salud Publ, Morelos 62508, MexicoInst Mexicano Seguro Soc, Mexico City, DF, MexicoEmory Univ, Dept Int Hlth, Rollins Sch Publ Hlth, Atlanta, GA 30322, USA TI - Multiple micronutrient supplementation during pregnancy: Effect on breast milk retinol concentration at one month postpartum MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103682 SO - Faseb Journal 2001 ;15(4):A642-A642 3165 UI - 12142 AU - Hernandez-Garduza O AU - Garcia-Sanchez F AU - Neau E AD - Inst Mexicano Petr, Grp Simulac Mol, Mexico City 07730, DF, MexicoUniv Mediterranee, Lab Chim Phys Marseille, F-13288 Marseille 9, FranceHernandez-Garduza, O, Inst Mexicano Petr, Grp Simulac Mol, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Generalization of composition-dependent mixing rules for multicomponent systems: prediction of vapor-liquid and liquid-liquid equilibria AB - A consistent generalization to mixing rules depending on the composition proposed by Adachi and Sugie, Panagiotopoulos and Reid, and Stryjek and Vera for the two-parameter mixing rule and by Schwartzentruber and Renon for the three-parameter mixing rule is presented. The invariance problem and dilution effect shortcomings pointed out by Michelsen and Kistenmacher when the original mixing rules are applied to multicomponent mixtures, are avoided by the generalized mixing rules. The proposed mixing rules involving their respective excess function models associated with a cubic equation of state (PRSV or PRCRP), were used on the representation of binary vapor-liquid (hydrocarbon-hydrocarbon, acetone-alcohol, acetone-water, alcohol-water, and alcohol-hydrocarbon) and liquid-liquid (hydrocarbon-water) equilibrium data. The binary interaction parameters of the model were used to test the performance of the generalization on the prediction of ternary vapor-liquid (acetone-methanol-water, acetone-ethanol-water and hexane-ethanol-benzene) and liquid-liquid (water-methanol-benzene, water-ethanol-hexane and water-1-propanol-benzene) equilibria. In addition, it is shown that a more satisfactory prediction of the ternary vapor-liquid and liquid-liquid equilibria can be obtained by using a limit form of the generalized three-parameter excess function model. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 1385-8947 UR - ISI:000172915100011 L2 - vapor-liquid equilibria;liquid-liquid equilibria;equation of state;excess function;mixing rule;PENG-ROBINSON EQUATION; PRSV EQUATION; STATE; MIXTURES; PRESSURES SO - Chemical Engineering Journal 2001 ;84(3):283-294 3166 UI - 11904 AU - Hernandez-Gonzalez EO AU - Martinez-Rojas D AU - Mornet D AU - Rendon A AU - Mujica A AD - IPN, CINVESTAV, Dept Cell Biol, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07738, DF, MexicoInst Bouisson Bertrand, INSERM, U128, Montpellier, FranceMed A CHRU, Lab Physiopathol Cellulaire & Mol Retine, Strasbourg, FranceHernandez-Gonzalez, EO, IPN, CINVESTAV, Dept Cell Biol, Av IPN 2508,Ap P 14-740, Mexico City 07360, DF, Mexico TI - Comparative distribution of short dystrophin superfamily products in various guinea pig spermatozoa domains AB - In this study, the presence and cellular distribution of dystrophin family products (i.e. Dp71d, Dp71f-like protein and dystrobrevin) was examined by indirect immunofluorescence and Western blotting in guinea pig spermatozoa. Two dystrophin-associated proteins, beta-dystroglycan and alpha-syntrophin, and nNOS a protein frequently associated with alpha-syntrophin, were determined. In spermatozoa lacking plasma membrane and acrosome, Dp71f-like protein was found in the postacrosomal perinuclear theca and also in the middle piece of the flagellum. In the flagellum, Dp71f-like protein is localized together with a-syntrophin and nNOS. Dp71d was present in the plasma membrane of the middle piece with beta-dystroglycan, alpha-syntrophin and nNOS. Dp71d was also present in plasma membrane of the post acrosomal region, but only with nNOS. Finally, dystrobrevin was located all along skeletal flagellum structures and in the subacrosomal hemisphere of the perinuclear theca. This distinct and complementary distribution in various domains of spermatozoa may reveal a specific function for each short dystrophin family product, in the stabilization of the domains where they are located MH - France MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Cell Biology U5 - J;Article AV - English IS - 0171-9335 UR - ISI:000173515200008 L2 - capacitation and acrosome reaction;sperm cytoskeleton;plasma membrane domains;perinuclear theca;Dp71 proteins;GLYCOPROTEIN COMPLEX; F-ACTIN; MEMBRANE CYTOSKELETON; MUSCULAR-DYSTROPHY; PERINUCLEAR THECA; ACROSOME REACTION; PROTEIN; EXPRESSION; UTROPHIN; DYSTROBREVIN SO - European Journal of Cell Biology 2001 ;80(12):792-798 3167 UI - 12755 AU - Hernandez-Lerma O AU - Romera R AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoUniv Carlos III Madrid, Dept Estadist & Econometria, Madrid 28903, SpainHernandez-Lerma, O, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, A Postal 14-740, Mexico City 07000, DF, Mexico TI - Limiting discounted-cost control of partially observable stochastic systems AB - This paper presents two main results on partially observable (PO) stochastic systems. In the rst one, we consider a general PO system x(t+1) = F(x(t), a(t), xi (t)), y(t) = G(x(t), eta (t)) (t = 0,1,...) (*) on Borel spaces, with possibly unbounded cost-per-stage functions, and we give conditions for the existence of alpha -discount optimal control policies (0<<1). In the second result we specialize () to additive-noise systems x(t + 1) = F-n(x(t), a(t)) + (t), y(t) = G(n)(x(t)) + eta (t) (t = 0,1,...) in Euclidean spaces with F-n (x, a) and G(n) (x) converging pointwise to functions F-infinity (x, a) and G(infinity) (x), respectively, and we give conditions for the limiting PO model x(t + 1) = F-infinity(x(t), a(t)) + xi (t), y(t) = G(infinity)(x(t)) + eta (t) to have an alpha -discount optimal policy MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 0363-0129 UR - ISI:000171174000002 L2 - partially observable control systems;partially observable Markov control processes;hidden Markov models;discounted cost criterion;ADAPTIVE-CONTROL; MARKOV; MODELS SO - Siam Journal on Control and Optimization 2001 ;40(2):348-369 3168 UI - 14030 AU - Hernandez-Lerma O AU - Lasserre JB AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoCNRS, LAAS, F-31077 Toulouse, FranceHernandez-Lerma, O, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, A Postal 14-740, Mexico City 07000, DF, Mexico TI - Zero-sum stochastic games in Borel spaces: Average payoff criteria AB - This paper is concerned with two-person zero-sum dynamic stochastic games in Borel spaces, with possibly unbounded payoff function, and several average (or ergodic) payoff criteria. We give conditions under which the long-run expected average payoff criterion, the sample-path average criterion, the existence of solutions to the average payoff Shapley equations, and a certain martingale condition are all equivalent MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 17 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 0363-0129 UR - ISI:000167678000011 L2 - zero-sum stochastic games;Borel spaces;expected average payoff;sample-path average payoff;Shapley equations;OPTIMALITY SO - Siam Journal on Control and Optimization 2001 ;39(5):1520-1539 3169 UI - 14345 AU - Hernandez-Lerma O AU - Lasserre JB AD - IPN, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoCNRS, LAAS, F-31077 Toulouse, FranceHernandez-Lerma, O, IPN, CINVESTAV, Dept Matemat, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Further criteria for positive Harris recurrence of Markov chains AB - We provide several necessary and sufficient conditions for a Markov chain on a general state space to be positive Harris recurrent. The conditions only concern asymptotic properties of the expected occupation measures MH - France MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000166812200035 L2 - probability measures;setwise convergence;Harris (Markov) chains SO - Proceedings of the American Mathematical Society 2001 ;129(5):1521-1524 3170 UI - 12621 AU - Hernandez-Montalvo V AU - Valle F AU - Bolivar F AU - Gosset G AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoGenencor Int Inc, Palo Alto, CA 94304, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62271, Morelos, MexicoGosset, G, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, Mexico TI - Characterization of sugar mixtures utilization by an Escherichia coli mutant devoid of the phosphotransferase system AB - Due to catabolite repression in microorganisms. sugar mixtures cannot be metabolized in a rapid and efficient manner. Therefore, the development of mutant strains that avoid this regulatory system is of special interest to fermentation processes. In the present study, the utilization of sugar mixtures by an Escherichia coli mutant strain devoid of the phosphotransferase system (PTS) was characterized. This mutant can transport glucose (PTS- Glucose(+) phenotype) by a non-PTS mechanism as rapidly as its wild-type parental strain. In cultures grown in minimal medium supplemented with glucose-xylose or glucose-arabinose mixtures, glucose repressed arabinose- or xylose-utilization in the wild-type strain. However, under the same culture conditions with the PTS- Glucose(+) mutant, glucose and arabinose were co-metabolized. but glucose still exerted a partial repressive effect on xylose consumption. In cultures growing with a triple mixture of glucose-arabinose-xylose, the wild-type strain sequentially utilized glucose. arabinose and finally, xylose. In contrast, the PTS- Glucose(+) strain co-metabolized glucose and arabinose, whereas xylose was utilized after glucose-arabinose depletion. As a result of glucose-arabinose co-metabolism, the PTS- Glucose(+) strain consumed the total amount of sugars contained in the culture medium 16% faster than the wildtype strain. [C-14]-Xylose uptake experiments showed that in the PTS- Glucose(+) strain, galactose permease increases xylose transport capacity and the observed partial repression of xylose utilization depends on the presence of intracellular glucose MH - Mexico|Morelos MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000171671100027 L2 - ETHANOL-PRODUCTION; ARABINOSE; STRAINS; XYLOSE; LEVEL SO - Applied Microbiology and Biotechnology 2001 ;57(1-2):186-191 3171 UI - 12677 AU - Hernandez-Pando R AU - Schon T AU - Orozco EH AU - Serafin J AU - Estrada-Garcia I AD - Natl Inst Med Sci & Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Lab, Mexico City 14000, DF, MexicoLinkoping Univ, Fac Hlth Sci, Dept Med Microbiol, S-58183 Linkoping, SwedenInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Immunol, Mexico City, DF, MexicoHernandez-Pando, R, Natl Inst Med Sci & Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Lab, Calle Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Expression of inducible nitric oxide synthase and nitrotyrosine during the evolution of experimental pulmonary tuberculosis AB - Nitric oxide (NO) is a relevant antimycobacterial factor in mouse macrophages, NO is a product of inducible nitric oxide synthase (iNOS). NO toxicity is greatly enhanced by reacting with superoxide to form peroxynitrite that reacts with many biological molecules. Tyrosine is one of the molecules with which NO reacts and the product is nitrotyrosine (NT). The production of peroxynitrite and the nitrosylation of proteins might play a role in bacterial killing and also in mediating host injury. In this study, we used a well-characterized mouse model of pulmonary tuberculosis to examine the local kinetics of expression and cellular distribution of iNOS and NT at the cellular and subcellular level. The histopathological study showed two phases of the disease: early and late. The early phase was characterized by mononuclear inflammation and granuloma formation. During this phase, high percentages of activated macrophages were observed that were immunostained for iNOS and NT. Immuno-electronmicroscopy showed NT immunoreactivity in lysosomes and mycobacterial wall and cytoplasm. The concentration of iNOS mRNA and NO metabolites were also elevated. The late phase was characterized by progressive pneumonia with focal necrosis and a decrease of iNOS mRNA and NO metabolites. The strongest NT immunostained areas were the necrotic tissue. Macrophages became foamy cells with scarce iNOS immunostaining but strong NT immunoreactivity. At the ultrastructural level, these cells showed NT immunolabeling in cytoskeleton, mitochondria, lysosomes and cell membrane. NT was also located in bronchial epithelial cell mitochondria, in cell membranes and cytoplasm of endothelial cells and in actin bundles within smooth muscle cells. These results suggest an important role of NO in mycobacterial killing, particularly during the early phase of the infection. They also suggest an important participation by NO in tissue damage during the late phase of the disease MH - Mexico|Distrito Federal MH - Sweden PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 25 U4 - Pathology;Toxicology U5 - J;Article AV - English IS - 0940-2993 UR - ISI:000171464300003 L2 - tuberculosis;nitric oxide;nitrotirosine;inducible nitric oxide synthase;GROWTH-FACTOR-BETA; MYCOBACTERIUM-TUBERCULOSIS; MURINE MACROPHAGES; PEROXYNITRITE; DYSFUNCTION; INHIBITION; MECHANISM; KINETICS; MODEL; ALPHA SO - Experimental and Toxicologic Pathology 2001 ;53(4):257-265 3172 UI - 12251 AU - Hernandez-Trujillo J AU - Bader RFW AD - Univ Nacl Autonoma Mexico, Fac Fis, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoMcMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaHernandez-Trujillo, J, Univ Nacl Autonoma Mexico, Fac Fis, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Properties of atoms in molecules: Construction of one-density matrix from functional group densities AB - The demonstrated transferability of functional groups defined as proper open systems within the theory of atoms in molecules is used to iteratively construct a one-electron density matrix P and its derived electron density distribution. The initial guess at the density used in the fitting procedure is obtained from the addition of the density distributions of groups defined in parent molecules by the maximal matching of their interatomic surfaces. The method thus takes advantage of the observation that the "zero-flux" boundary condition defining a proper open system maximizes the transferability of the density distribution of a given group between molecules, one that is accompanied by a paralleling transferability in all of its properties. The construction is subject to the constraints that P be idempotent and normalized. The method is applied to the construction of P for the molecules HCH2\CH2X, with X=CH3, NH2, OH, and F, where the vertical bar denotes the new C-C interatomic surface, the new zero-flux boundary. The densities for the groups HCH2\ and \CH2X are defined in their dimer molecules, HCH2\CH2H and XCH2\CH2X. (C) 2001 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000172536000005 L2 - X-RAY-DIFFRACTION; ELECTRON-DENSITY; EQUIVALENT METHOD; OPEN SYSTEM; TRANSFERABILITY; ADDITIVITY; PARAMETERS; CHEMISTRY; OPERATORS; BERYLLIUM SO - Journal of Chemical Physics 2001 ;115(23):10595-10607 3173 UI - 12798 AU - Hernandez-Zanuy AC AU - Carballa JL AD - UNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Mazatlan 82000, MexicoMinist Ciencias Tecnol & Medio Ambiente Cuba, Inst Oceanol, Havana, CubaCarballa, JL, UNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Apartado Postal 811, Mazatlan 82000, Mexico TI - Distribution and abundance of ascidian assemblages in Caribbean reef zones of the Golfo de Batabano (Cuba) MH - Cuba MH - Mexico|Sinaloa PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0722-4028 UR - ISI:000171263100010 L2 - ascidian;assemblages;distribution;water movement;POPULATIONS SO - Coral Reefs 2001 ;20(2):159-162 3174 UI - 12297 AU - Hernandez AC AU - Fichthorn KA AD - Penn State Univ, Dept Chem Engn, University Pk, PA 16801, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoHernandez, AC, Penn State Univ, Dept Chem Engn, University Pk, PA 16801 USA TI - Monte Carlo study of the static and dynamic behaviors of polymer chains near an adsorbent surface AB - Using the Monte Carlo method for the bond fluctuation model a study of the static and dynamic properties of polymer chains in the adsorption process on a solid surface is analyzed. Following the course of individual chains a detailed description of their structure, chain conformation, surface coverage and volume fraction profiles were measured for systems with a different number of chains over a wide range of temperatures. For the dynamics, the time relaxation function and relaxation time were analyzed for systems at different temperatures and concentration of chains. (C) 2001 Published by Elsevier Science Ltd on behalf of the International Association for Hydrogen Energy MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000172479800009 L2 - TRANSFORM INFRARED-SPECTROSCOPY; ADSORPTION; RELAXATION; LAYERS; DIMENSIONS; SIMULATION; ALGORITHM; KINETICS SO - International Journal of Hydrogen Energy 2001 ;26(12):1307-1313 3175 UI - 14518 AU - Hernandez B AU - Shapiro NM AU - Singh SK AU - Pacheco JF AU - Cotton F AU - Campillo M AU - Iglesias A AU - Cruz V AU - Gomez JM AU - Alcantara L AD - IPSN, F-92265 Fontenay Aux Roses, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Grenoble 1, LGIT, F-38041 Grenoble, FranceUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoHernandez, B, IPSN, 60-68 Ave Geb Leclerc,BP 6, F-92265 Fontenay Aux Roses, France TI - Rupture history of September 30, 1999 intraplate earthquake of Oaxaca, Mexico (M-w=7.5) from inversion of strong-motion data AB - Near-source strong motions are inverted to estimate the rupture history of intraslab, normal-faulting September 30, 1999, Oaxaca, Mexico earthquake. Two focal mechanisms (Harvard and NEIC CMT solutions) are tested for the source geometry. The inversion with the NE dipping fault plane of the Harvard solution best matches the data (strike= 295 degrees, dip= 50 degrees, rake= -82 degrees). We estimated the slip distribution on the fault and the associated rupture front propagation, as well as the rise time. The inversion results show that the rupture mainly propagated from ESE to WNW and slightly downdip, with an average rupture velocity of about 3 km/s. The rise time ranges between 1 and 2 s. The slip distribution on the fault is mainly concentrated in two interconnected patches with a maximum slip of 2.5 m located about 20 km and 40 km WNW of the hypocenter. Most of the slip is released at an average depth of 45 km. A smaller area with a maximum slip of 1.5 m is also observed close to the hypocenter. The total co-seismic moment released is equal to 1.8 x 10(20) Nm MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 15 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000166415400043 SO - Geophysical Research Letters 2001 ;28(2):363-366 3176 UI - 13095 AU - Hernandez D AU - Santiago J AU - Colin L AU - Iturralde P AU - Guevara M AU - Gonzalez HYA AD - Inst Nacl Cardiol Ignacio Chavez, INCICH, Dept Electrofisiol, Mexico City, DF, MexicoHosp Reg Univ Jose Cabral & Baez, Dept Cardiol, Santiago, Dominican RepHernandez, D, EPS 1-5714,POB 02-5360, Miami, FL 33102, USA TI - Usefulness of superficial electrocardiogram to diagnose narrow QRS tachycardias: Correlation with intracavitary electrograms AB - Introduction and objectives. The electrocardiogram is an important tool to diagnose tachycardias. The sequence of analysis of the superficial electrocardiogram was evaluated for the diagnosis of supraventricular tachycardias with narrow QRS complexes (less than or equal to 110 ms) establishing correlation with intracavitary electrograms. Patients and methods. Between November 1996-October 1998, 674 electrophysiological studies were revised. 173 cases were selected, during which supraventricular tachycardias were inducted. In each study, the superficial electrocardiographic leads were correlated with the intracavitary electrograms during tachyarrhythmias. The P waves were located with respect to the R waves, the R-T or T-R' intervals, and the T waves, and relations between atrioventricular and ventriculoatrial intervals were stablished with the P-R' and R-P intervals, respectively, in the electrocardiogram. Results. 107 patients were female. Upon locating the P waves in the electrocardiogram, in each supraventricular tachycardia we observed: a) P waves coincided with the R waves: 30 typical nodal reentries; b) P waves between R and T waves: 95 orthodromic atrioventricular reentries, 27 nodal reentries, 1 atrial tachycardia; c) P waves between T and R' waves: 4 nodal reentries, 5 orthodromic atrioventricular reentries, 7 atrial tachycardias, and d) P waves over T waves: 3 orthodromic atrioventricular reentries, and 1 nodal reentry. Conclusions. The sequence of analysis locating the P waves in the superficial electrocardiogram is an useful, rapid method, with adequate sensitivity or specificity, in the evaluation of the mechanisms that sustain more common supraventricular tachycardias, permiting the performance of differential diagnosis between some of them MH - Dominican Rep MH - Mexico|Distrito Federal MH - USA PB - BARCELONA: EDICIONES DOYMA S/L RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - Spanish IS - 0300-8932 UR - ISI:000170263800006 L2 - electrophysiology;interval;reentry;tachyarrhythmias;SUPRAVENTRICULAR TACHYCARDIA; SHORTER SO - Revista Espanola de Cardiologia 2001 ;54(8):965-972 3177 UI - 13642 AU - Hernandez E AU - Ordejon P AU - Terrones H AD - Univ Autonoma Barcelona, CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoHernandez, E, Univ Autonoma Barcelona, CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, Spain TI - Fullerene growth and the role of nonclassical isomers AB - We report results of a survey of the energetics and stability of classical and I-heptagon nonclassical fullerene clusters in the range of sizes C-30 to C-70, using both total-energy tight-binding and first-principles density functional theory methods. We conclude from this survey that 1-heptagon isomers of high stability exist at every nuclearity, and that these nonclassical isomers play an important part in the growth mechanism of fullerenes MH - Mexico|Queretaro MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000168814200015 L2 - CARBON RINGS; C-60; FRAGMENTATION; ENERGETICS; DYNAMICS SO - Physical Review B 2001 ;6319(19): 3178 UI - 13274 AU - Hernandez J AU - Camarillo E AU - Loro H AU - Murrieta H AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Ingn, Fac Ciencias, Dept Acad Fis, Lima, PeruHernandez, J, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Post 20364, Mexico City 01000, DF, Mexico TI - Bi4Ge3O12 : Nd3+ and Bi12SiO20 : Nd3+ - A comparative spectroscopic study AB - A systematic and comparative study of luminescence and optical absorption properties of the trivalent rare earth neodymium ion in the Bi4Ge3O12 and Bi12SiO20 crystal lattices is presented. The incorporation of Nd3+ ions into these crystals is more easily achieved in the first one than in the latter. In both matrices their intrinsic emission gives rise to a radiative energy transfer between the host and the impurity ion. On the other hand most of the Stark energy levels have been identified for both matrices. A calculation of the Ohm (2), Ohm (4) and Ohm (6) Judd-Ofelt parameters is given for each crystal. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peru PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000169967300158 L2 - bismuth germanates and silicates;neodymium spectra;Judd-Ofelt parameters;SINGLE-CRYSTALS; LUMINESCENCE; IONS; ND3+ SO - Journal of Alloys and Compounds 2001 ;323():714-717 3179 UI - 13000 AU - Hernandez JA AU - Camarillo EG AU - Munoz G AU - Flores CJ AU - Cabrera EB AU - Jaque F AU - Romero JJ AU - Sole JG AU - Murrieta HS AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainHernandez, JA, Univ Nacl Autonoma Mexico, Inst Fis, POB 20-364, Mexico City 01000, DF, Mexico TI - Red and green fluorescence of Mn2+ in NaCl AB - The fluorescence (emission and excitation) spectrum of Mn2+ ion in NaCl has been investigated for freshly quenched samples (diluted Mn2+ ions) and as grown samples (Mn2+ ions forming aggregates and/or precipitates). Two main emission bands are generally observed in as grown samples, peaking at 505 nm and around 610 nm. Both emission bands are related to different manganese precipitates. Quenched samples show only the red emission but peaking at 605 nm and with a different excitation spectrum to that of the as grown crystals. Thus, this crystal is suitable to operate as a double color (red and green) emitting phosphor where the red and green relative intensities can be controlled by a thermal treatment. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000170591200007 L2 - OPTICAL SPECTROSCOPY; SINGLE-CRYSTALS; SUZUKI PHASE; IONS SO - Optical Materials 2001 ;17(4):491-495 3180 UI - 13618 AU - Hernandez L AU - Hess PO AU - Algora A AU - Levai G AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoHungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryHernandez, L, UNAM, Inst Ciencias Nucl, CU AP 70-543, Mexico City 04510, DF, Mexico TI - alpha-clustering in Be isotopes AB - The Be chain of isotopes is investigated within the Semimicroscopic Algebraic Cluster Model (SACM). For that the SACM is extended to odd-mass p-shell nuclei. We show that the main features of the Be isotopes can be well explained. Though for the neutron halo nucleus Be-11 some problems remain, the shell model still can describe the rough structures of these nuclei. In Be-11 a shell inversion takes place reflecting the high deformation of the system. The quadrupole-quadrupole interaction plays a dominant role in p-shell nuclei MH - Hungary MH - Mexico|Distrito Federal PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000168898400027 L2 - semi-microscopic algebraic cluster model;Be-11;SEMIMICROSCOPIC ALGEBRAIC DESCRIPTION; ANTISYMMETRIZED MOLECULAR-DYNAMICS; EXCITED-STATES; SHELL-MODEL; NUCLEI SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2001 ;13(1-3):197-198 3181 UI - 12819 AU - Hernandez M AU - Miralrio G AU - Arevalo A AU - Bernes S AU - Garcia JJ AU - Lopez C AU - Maitlis PM AU - Del Rio F AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, EnglandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoGarcia, JJ, Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Reactivity of substituted thiophenes toward tris(triethylphosphine)platinum(0), -palladium(0), and -nickel(0) AB - The reactions of [M(PEt3)(3)] (M = Pt (1), Pd (2), Ni (3)) with 3-chlorothiophene, 2-chlorothiophene, 3-nitrothiophene, 2-nitrothiophene, 2-methoxythiophene, 3-methoxythiophene, 2-acetylthiophene, and 3-acetylthiophene afforded thiaplatinacycles of the type [(Et3P)(2)M-(C,S-C4H3RS)], (for M = Pt, R = Cl (4 and 5), NO2 (6 and 7), MeO (8 and 9), Ac (10 and 11); for M = Pd, R = Cl (12 and 13), NO2 (14), MeO (15 and 16), Ac (17 and 18), for M = Ni, R = Cl (19)). When 3 and 2-chlorothiophene were reacted, another compound resulting from the oxidative addition of the C-Cl bond could be isolated, with the formulation [(Et3P)(2)Ni-(Cl)(eta (1)-T)] (20). Additionally the reaction of 3 with 2-nitrothiophene produced a compound derived from a C-H activation reaction, [(Et3P)(2)Ni(H)(eta (1)-NO2T)] (21). The thiaplatinacycles 8-11 were shown to be active intermediates in HDS reactions, under catalytic conditions, to give 81 cycles at 300 psi, 100 degreesC in THF, in the presence of metallic mercury. Crystal structures are reported for 4 and 7 MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000171031800013 L2 - HYDRODESULFURIZATION; COMPLEXES; DIBENZOTHIOPHENE; PHOSPHINE; RING SO - Organometallics 2001 ;20(19):4061-4071 3182 UI - 13761 AU - Hernandez MP AU - Alonso CF AU - Pena JL AD - Univ La Habana, Inst Mat & React, Ciudad De La Habana 10400, CubaUniv La Habana, Fac Fis, Ciudad De La Habana 10400, CubaIPN, CICATA, Mexico City 89500, DF, MexicoHernandez, MP, Univ La Habana, Inst Mat & React, San Lazaro & L,Vedado Plaza, Ciudad De La Habana 10400, Cuba TI - Barrier height determination in homogeneous nonideal Schottky contacts AB - A novel method is proposed to determine effective barrier heights in homogeneous nonideal Schottky contact from I-V measurements. This method takes into account the different mechanisms of current flow through the metal-semiconductor interface. The total current has been expressed as the sum of two independent terms which are: (I) the thermionic current where the ideality factor value is equal to one and (2) the contribution of different transport mechanisms. The second term responds to a general expression of the thermionic emission theory where the barrier height and the ideality factor are voltage dependent. The effective barrier height is found by means of subtraction of the transport mechanism terms from the total current. The method was applied to a group of I-V experimental curves which were reported by M Barus and D Donoval 1993 Solid State Electron. 36 969 MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000168492900006 L2 - ELECTRON-EMISSION MICROSCOPY; HIGH SERIES RESISTANCE; CURRENT-VOLTAGE CHARACTERISTICS; DIODES; INTERFACES; TRANSPORT; EXTRACTION; PARAMETERS; GAAS SO - Journal of Physics D-Applied Physics 2001 ;34(8):1157-1161 3183 UI - 12042 AU - Hernandez P AU - Debray H AU - Jaekel H AU - Garfias Y AU - Jimenez MD AU - Martinez-Cairo S AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Med, Lab Inmunol, Mexico City 04510, DF, MexicoInst Nacl Enfermedades Resp, Dept Bioquim, Tlalpan 14080, DF, MexicoUniv Sci & Technol Lille, Chim Biol Lab, CNRS, UMR 8576, F-59655 Villeneuve Dascq, FranceIMSS, Unidad Invest, Ctr Med Nacl, Mexico City 06725, DF, MexicoUniv Nacl Autonoma Mexico, Lab Inmunol, Dept Bioquim, Fac Med, Mexico City 04510, DF, MexicoZenteno, E, Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Med, Lab Inmunol, POB 70159, Mexico City 04510, DF, Mexico TI - Chemical characterization of the lectin from Amaranthus leucocarpus syn. hypocondriacus by 2-D proteome analysis AB - In this work, we characterized chemically the N-acetyl-D-galactosamine specific lectin from Amaranthus leucocarpus syn hypocondriacus lectin (ALL). It is a dimeric glycoprotein composed by three isoforms with pl at 4.8, 4.9, and 5.2. Circular dichroism analysis indicated that the secondary structure of ALL contains 45% of beta-sheet and 5% of alpha-helix. Amino acid sequence of the purified lectin and its isoforms was determined from peptides obtained after trypsin digestion by MALDI-TOF (Matrix assisted laser desorption ionization-time of flight). The tryptic peptides prepared from the purified lectin and the three isoforms showed different degrees (80 to 83%) of identity with the amino acid sequence belonging to a previously described high nutritional value protein from A. hypocondriacus not shown at the time to be a lectin. Furthermore, analysis of tryptic peptides obtained from ALL previously treated with peptide N-glycosidase, revealed a 93% identity with the aforementioned protein. Presence of N-glycosidically linked glycans of the oligomannosidic type and, in minor proportion, of the N-acetyllactosaminic type glycans was determined by affinity chromatography on immobilized Con A MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0282-0080 UR - ISI:000173113900007 L2 - Amaranthus leucocarpus;plant lectins;T and Tn-specific lectin;glycoproteins;proteome analysis;circular dichroism;Amaranthus lectins;SECONDARY STRUCTURE PREDICTION; CARBOHYDRATE-RECOGNITION; AFFINITY-CHROMATOGRAPHY; LEGUME LECTINS; SPECIFICITY; CAUDATUS; PURIFICATION; PROTEINS; SEEDS; SITE SO - Glycoconjugate Journal 2001 ;18(4):321-329 3184 UI - 12540 AU - Hernandez R AU - Herrera J AU - Bosseno MF AU - Breniere SF AU - Espinoza B AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoIRD, F-34032 Montpellier 1, FranceHernandez, R, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Ap Postal 70-228, Mexico City 04510, DF, Mexico TI - Trypanosoma cruzi: Data supporting clonality in Mexican stocks AB - To further study genetic heterogeneity of Mexican stocks of Trypanosoma cruzi, genomic Southern analyses from 54 Mexican isolates and 5 South American reference stocks were carried out. The membranes were hybridized with a homologous cDNA clone from the ribosomal protein S4 that identifies allelic bands from a single gene type locus. These allelic bands were sequentially numbered depending on their relative size. Mexican T. cruzi stocks were quite homogeneous: 31 cases (57%) showed a homozygous genotype 3/3, and 21 isolates (38%) exhibited the heterozygote genotype 2/3. Just 2 Mexican stocks (3%) showed a different genotype 2/5, but the potential parental homozygous 2/2 was never observed. Being that T. cruzi is a diploid organism, the apparent absence of the presumptive parental homozygous genotype 2/2 argues against sexual reproduction within the population, at least as a common event. Therefore, these data support a clonal population structure of T. cruzi in Mexico MH - France MH - Mexico|Distrito Federal PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000171782300046 L2 - MULTILOCUS ENZYME ELECTROPHORESIS; PHYLOGENETIC LINEAGES; DNA; POPULATIONS SO - Journal of Parasitology 2001 ;87(5):1178-1181 3185 UI - 13807 AU - Hernandez RED AU - Rodriguez DM AU - Ramirez CAM AD - NORTEL NETWORKS, Apodaca, NL, MexicoInst Tecnol & Estud Super Monterrey, Ctr Elect & Telecomunic, Monterey 64849, NL, MexicoNORTEL NETWORKS, Richardson, TX 75082, USAHernandez, RED, NORTEL NETWORKS, Carretera Miguel Aleman Km 205, Apodaca, NL, Mexico TI - QoS degradation in cellular systems due to H/O hysteresis AB - While hysteresis alleviates the ping-pong effect in a cellullar handoff, it also introduces severe outage degradation. In this letter, the handoff triggering condition as well as the unavailability to handoff completion are studied in terms of mobile location and hysteresis factor. It is shown how hysteresis favors high dropped-call probability zones within the service area. The proposed methodology is applicable to both forward and reverse channel analysis. Numerical results are presented and discussed MH - Mexico|Nuevo Leon MH - USA PB - MILAN: ASSOC ELETTROTECNICA ED ELETTRONICA ITALIANA RP - NOT IN FILE U3 - TC 0 U4 - Telecommunications U5 - J;Letter AV - English IS - 1120-3862 UR - ISI:000168434000008 SO - European Transactions on Telecommunications 2001 ;12(2):151-154 3186 UI - 12640 AU - Hernandez X AU - vila-Reese V AU - Firmani C AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsserv Astron Brera, I-23807 Merate, LC, ItalyHernandez, X, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - A cosmological study of the star formation history in the solar neighbourhood AB - We use a cosmological galactic evolutionary approach to model the Milky Way. A detailed treatment of the mass aggregation and dynamical history of the growing dark halo is included, together with a self-consistent physical treatment for the star formation processes within the growing galactic disc. This allows us to calculate the temporal evolution of star and gas surface densities at all galactic radii, in particular, the star formation history (SFH) at the solar radius. A large range of cosmological mass aggregation histories (MAHs) is capable of producing a galaxy with the present-day properties of the Milky Way. The resulting SFHs for the solar neighbourhood bracket the available observational data for this feature, the most probable MAH yielding the optimal comparison with these observations. We also find that the rotation curve for our Galaxy implies the presence of a constant density core in its dark-matter halo MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000171585600029 L2 - stars : formation;Galaxy : evolution;Galaxy : halo;solar neighbourhood;galaxies : formation;dark matter;HIERARCHICAL FORMATION SCENARIO; DWARF SPHEROIDAL GALAXY; LARGE MAGELLANIC CLOUD; DARK-MATTER HALOES; MILKY-WAY; DISK GALAXIES; CHEMICAL EVOLUTION; SPIRAL GALAXIES; GALACTIC DISK; SURFACE BRIGHTNESS SO - Monthly Notices of the Royal Astronomical Society 2001 ;327(1):329-338 3187 UI - 13358 AU - Hernandez X AU - Ferrara A AD - Osservatorio Astrofis Arcetri, I-50125 Florence, ItalyUniv Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, JapanHernandez, X, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264,Ciudad Univ Mexico, Mexico City 04510, DF, Mexico TI - Cosmological origin of the lowest metallicity halo stars AB - We explore the predictions of the standard hierarchical clustering scenario of galaxy formation, regarding the numbers and metallicities of PopIII stars that are likely to be found within our Galaxy today. By PopIII we refer to stars formed at large redshift (z > 4), with low metallicities ([Z/Z.] < -2.5) and in small systems (total mass 2 x 10(8) M.) that are extremely sensitive to stellar feedback, and which through a prescribed merging history end up becoming part of the Milky Way today. An analytic, extended Press-Schechter formalism is used to obtain the mass functions of haloes which will host PopIII stars at a given redshift, and which will end up in Milky Way sized systems today. Each of these is modelled as a mini-galaxy, with a detailed treatment of the dark halo structure, angular momentum distribution, final gas temperature and disc instabilities, all of which determine the fraction of the baryons that are subject to star formation. The use of new primordial metallicity stellar evolutionary models allows us to trace the history of the stars formed, and give accurate estimates of their expected numbers today and their location in L/L. versus T/K Hertzsprung-Russell (HR) diagrams. A first comparison with observational data suggests that the initial mass function (IMF) of the first stars was increasingly high-mass weighted towards high redshifts, levelling off at z greater than or similar to 9 at a characteristic stellar mass scale m(s) = 10-15 M. MH - Italy MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 33 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000169614300018 L2 - stars : luminosity function, mass function;Galaxy : abundances;Galaxy : formation;galaxies : evolution;galaxies : formation;GALAXY FORMATION; HIERARCHICAL-MODELS; LOCAL GROUP; UNIVERSE; REIONIZATION; DEPENDENCE; EVOLUTION; OBJECTS SO - Monthly Notices of the Royal Astronomical Society 2001 ;324(2):484-490 3188 UI - 13361 AU - Herrel A AU - De Grauw E AU - Lemos-Espinal JA AD - Univ Instelling Antwerp, Dept Biol, B-2610 Wilrijk, BelgiumUniv Nacl Autonoma Mexico, Unidad Biol Tecnol & Protipos, Unidad Biol, Ecol Lab, Mexico City 04510, DF, MexicoUniv Puget Sound, Dept Biol, Tacoma, WA 98416, USAHerrel, A, Univ Instelling Antwerp, Dept Biol, Univ Pl 1, B-2610 Wilrijk, Belgium TI - Head shape and bite performance in xenosaurid lizards AB - Bite performance in lizards influences many aspects of the animal's lifestyle. During feeding, inter- and intrasexual interactions, and defensive behavior, the ability to bite hard might be advantageous. Although biomechanical considerations predict clear relations between head shape and bite performance, this has rarely been tested. Here we investigate the effect of head shape on bite performance in three closely related species of xenosaurid lizards. Our data show that in this family of lizards, bite performance is mainly determined by head height, with high headed animals biting harder than flat headed ones. Species clearly differ in head shape and bite performance and show a marked sexual dimorphism. The dimorphism in head shape also results in an intersexual difference in bite performance. As head height is the major determinant of bite performance in xenosaurid lizards, trade offs between a crevice dwelling life-style and bite performance seem to occur. The evolutionary implications of these results are discussed. (C) 2001 Wiley-Liss,Inc MH - Belgium MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 44 U4 - Zoology U5 - J;Article AV - English IS - 0022-104X UR - ISI:000169607800003 L2 - SEXUAL DIMORPHISM; DIVERGENCE HYPOTHESIS; GALLOTIA-GALLOTI; FORCE ANALYSIS; SELECTION; PREY; SIZE; PHYLOGENIES; MORPHOLOGY SO - Journal of Experimental Zoology 2001 ;290(2):101-107 3189 UI - 13984 AU - Herrera-Aguilar A AU - Kechkin OV AD - Univ Michoacana, Inst Fis & Matemat, Morelia, Michoacan, MexicoMoscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, RussiaHerrera-Aguilar, A, Univ Michoacana, Inst Fis & Matemat, Apdo Postal 2-82, Morelia, Michoacan, Mexico TI - Bosonic string - Kaluza-Klein theory exact solutions using 5D-6D dualities AB - We present explicit formulas which allow one to transform a general solution of the 6D Kaluza-Klein theory compactified on a three-torus into a special solution of the 6D bosonic string theory compactified on a three-torus, as well as into the general solution of the 5D bosonic string theory compactified on a two-torus. We construct a new family of extremal solutions of the 3D chiral equation for the SL(4, R)/SO(4) coset matrix and interpret it in terms of the component fields of these three duality related theories MH - Mexico|Michoacan MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000167821200004 L2 - 3 DIMENSIONS; POTENTIALS; GRAVITY SO - Modern Physics Letters A 2001 ;16(1):29-39 3190 UI - 13339 AU - Herrera-Campos MA AU - Nash TH AU - Garcia AZ AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoArizona State Univ, Dept Plant Biol, Tempe, AZ 85287, USAInst Mexicano Petr, Ft Monmouth, NJ 07703, USAHerrera-Campos, MA, Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Apdo Postal 70-233, Mexico City 04510, DF, Mexico TI - Preliminary study of the Usnea fragilescens aggregate in Mexico AB - This study is the first attempt so review the Usnea fragilescens complex in Mexico. Morphological, anatomical, and chemical characters, as well as distribution are described for nine species. The updated distribution of U. dasaea Stirt. in Mexico is provided. A discriminant analysis of the CMA of the most common species is used to show the reliability of the correlation of anatomical, morphological, and chemical characters in their separation. Usnea brasiliensis (Zahlbr.) Motyka, U. esperantiana Clerc, U. fragilescens Lynge var mollis (Vain.) Clerc, U. jamaicensis Ach., and U. ramillosa Motyka s.str. are new records for Mexico. Usnea brasiliensis is a new record for North America. A key for the U. fragilescens group in Mexico is provided MH - Mexico|Distrito Federal MH - USA PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000169804900008 L2 - LICHEN GENUS USNEA; CHEMICAL VARIATION; FENNOSCANDIA; MORPHOLOGY; FORESTS; COMPLEX SO - Bryologist 2001 ;104(2):235-259 3191 UI - 12293 AU - Herrera-Gomez A AU - guirre-Tostado FS AU - Sun Y AU - Pianetta P AU - Yu Z AU - Marshall D AU - Droopad R AU - Spicer WE AD - CINVESTAV Queretaro, Realll De Juriqulla 76230, Queretaro, MexicoCINVESTAV Fis, Zacatenco 07360, DF, MexicoStanford Synchrotron Radiat Lab, Menlo Pk, CA 94025, USAMotorola Inc, Phys Sci Res Labs, Tempe, AZ 85284, USAHerrera-Gomez, A, CINVESTAV Queretaro, Libramiento Norponiente 2000, Realll De Juriqulla 76230, Queretaro, Mexico TI - Photoemission from the Sr/Si(001) interface AB - The growth of Sr on n-type Si(001) was studied in detail for coverages between 0 and 1 monolayer (ML) using core level photoemission spectroscopy. In a similar manner, the Sr saturation coverage was studied in the 600-925 degreesC temperature range. Data analysis was carried out by a method that allows accurate determination of the band-bending shifts. Using this method it is possible to pinpoint the formation and destruction of chemical species from bungled core level photoemission data without needing to know details of the chemical composition of the spectra. Through this analysis it was established that the interaction between Sr and Si breaks down the binding energy difference between upward and downward Si dimer atoms. In addition, it was found that the saturation coverage exhibits a clear plateau at 1 ML around 650 degreesC, and a slope change at 1/3 ML around 850 degreesC. The surface band bending suffers a discontinuous increase as the Sr coverage surpasses 1/2 s ML and as the low energy electron diffraction symmetry changes from [2x3] to [2x1]. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000172489800039 L2 - JET VAPOR-DEPOSITION; THIN-FILMS; CAPACITORS; SURFACE; SILICON; OXIDES; SR SO - Journal of Applied Physics 2001 ;90(12):6070-6072 3192 UI - 13751 AU - Herrera G AU - Sanchez-Hemandez A AU - Cuautle E AU - Magnin J AD - Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoCtr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilHerrera, G, Ctr Invest & Estudios Avanzados, Apdo Postal 14 740, Mexico City 07000, DF, Mexico TI - Production asymmetry of D mesons in gamma p collisions AB - We study the production asymmetry of charm versus anticharm mesons in photon-proton interactions. We consider photon-gluon fusion plus higher order corrections in which light quarks through vector meson-proton interactions contribute to the cross section. Nonperturbative effects are included in terms of a recombination mechanism which gives rise to a production asymmetry. (C) 2001 Published by Elsevier Science B.V MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000168525700006 L2 - NUCLEON-INTERACTIONS; CHARM PRODUCTION; PHOTOPRODUCTION; DISTRIBUTIONS SO - Physics Letters B 2001 ;505(1-4):36-42 3193 UI - 13667 AU - Herrera J AU - Kuschnir E AU - Garcia DL AU - Montenegro F AU - Iglesias FJ AU - Medina G AU - Torres A AD - Inst Nacl Cardiol, Mexico City, DF, MexicoUniv Nacl Cordoba, RA-5000 Cordoba, ArgentinaFdn Santa Fe Bogota, Bogota, ColombiaHosp Eugenio Espejo, Quito, EcuadorCtr Med Caribe, Colon, PanamaBayer Mexico, Mexico City, DF, Mexico TI - Nifedipine (adalat), amlodipine and enalapril have comparable antihypertensive efficacy. The ADAME trial MH - Argentina MH - Colombia MH - Ecuador MH - Mexico|Distrito Federal MH - Panama PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0194-911X UR - ISI:000167748000151 SO - Hypertension 2001 ;37(3):1016-1016 3194 UI - 12475 AU - Herrera LA AU - Rodriguez U AU - Gebhart E AU - Ostrosky-Wegman P AD - Univ Nacl Autonoma Mexico, Dept Genet & Toxicol Ambiental, Inst Invest Biomed, Mexico City 04510, DF, MexicoSecretaria Salud Mexico, Inst Nacl Cancerol, Mexico City, DF, MexicoSecretaria Salud Mexico, Inst Nacl Neurol & Neurocirugia, Mexico City, DF, MexicoUniv Erlangen Nurnberg, Inst Humangenet, D-8520 Erlangen, GermanyHerrera, LA, Univ Nacl Autonoma Mexico, Dept Genet & Toxicol Ambiental, Inst Invest Biomed, POB 70-228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Increased translocation frequency of chromosomes 7, 11 and 14 in lymphocytes from patients with neurocysticercosis AB - Neurocysticercosis (NCC) has been associated with a high frequency of DNA damage in human circulating lymphocytes and more recently with the development of hematological malignancies. Chronic inflammation, a common feature of helminthic infections, has been proposed to play a key role in carcinogenesis induced by parasites. However, this mechanism is more likely to occur during local tumorigenesis rather than in systemic neoplasia such as that reported for patients with NCC. As an alternative, constant antigen stimulation, which is a feature of chronic NCC, may increase the frequency of aberrations in chromosomes that harbor regions constantly rearranged during T and B lymphocyte maturation, e.g. chromosomes 7 and 14. Therefore, in this study we determined the frequencies of aberrations in chromosomes 7, 11 and 14 in lymphocytes from 10 NCC patients and 10 controls and compared them with the frequency observed in chromosomes 1, 2 and 4 in the same cell samples. Chromosome aberrations were analyzed using a chromosome painting technique. Although the genome painted by probes for chromosomes 1, 2 and 4 was almost twice as large as that painted by probes for chromosome 7, 11 and 14, translocations involving the later (median 7.6 per 1000 metaphases) were more frequent than those occurring in chromosomes 1, 2 and 4 (median 2.5 per 1000 metaphases, P = 0.002). These results suggest that persistent antigen stimulation can cause chromosome instability in lymphocytes from patients with NCC and should be considered as an additional mechanism whereby parasites may induce cancer MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0267-8357 UR - ISI:000171946500007 L2 - TAENIA-SOLIUM CYSTICERCOSIS; INSITU HYBRIDIZATION; CANCER; ABERRATIONS; PROLIFERATION; PRAZIQUANTEL; INVOLVEMENT SO - Mutagenesis 2001 ;16(6):495-497 3195 UI - 12561 AU - Herrera LG AU - Hobson KA AU - Manzo A AU - Estrada D AU - Sanchez-Cordero V AU - Mendez G AD - Natl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Saskatchewan, Dept Biol, Saskatoon, SK S7N 0W0, CanadaHerrera, LG, Natl Autonomous Univ Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - The role of fruits and insects in the nutrition of frugivorous bats: Evaluating the use of stable isotope models AB - We estimated the relative contribution of fruits and insects as sources of dietary protein in two species of Neotropical frugivorous bats (Artibeus jamaicensis and Sturnira lilium) using stable carbon and nitrogen isotope analyses. An An insectivorous species (Pteronotus parnellii) was also included for comparison. We found constant patterns in stable carbon and nitrogen isotope composition in blood that separated the two species of frugivorous bats from the insectivorous bat. When we used these isotopic values (combined with those of dietary fruits and insects) to estimate the percent contribution of fruits and insects to the diet of the bats, we obtained different results, depending on assumptions and model adopted. We tested models using both delta N-15 and delta C-13 results simultaneously and separately and further used diet-tissue fractionation factors of 3 parts per thousand for nitrogen and 1 and 3.5 parts per thousand for carbon. We found that a carbon-based model with a diet-blood enrichment factor of 3.5 parts per thousand produced the most parsimonious results. The model estimated that A. jamaicensis and S. lilium obtained most of their protein requirements from fruits, whereas P parnellii fed mostly on insects. No sexual or seasonal variations in the diet of the two frugivorous species were detected. We found no evidence that the diet of sexually active females differed from that of nonsexually active females in the two species of frugivorous bats. We suggest that future studies better define isotopic fractionation between diet and tissues of bats using captive rearing and controlled diets MH - Canada MH - Mexico|Distrito Federal PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 15 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000171709800015 L2 - Artibeus jamaicensis;carbon-13;frugivory;Mexico;nitrogen-15;nutritional ecology;phyllostomid bats;stable isotope analysis;Sturnira lilium;tropical wet forest;TROPHIC RELATIONSHIPS; SEASONAL-CHANGES; PHYSIOLOGICAL ECOLOGY; ENERGY-REQUIREMENTS; NITROGEN; CARBON; DIETS; FRACTIONATION; DELTA-C-13; SEABIRDS SO - Biotropica 2001 ;33(3):520-528 3196 UI - 13598 AU - Herrera LG AU - Hobson KA AU - Miron L AU - Ramirez N AU - Mendez G AU - Sanchez-Cordero V AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Saskatchewan, Dept Biol, Saskatoon, SK S7N 0W0, CanadaHerrera, LG, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Sources of protein in two species of phytophagous bats in a seasonal dry forest: Evidence from stable-isotope analysis AB - The relative importance of plants and insects as sources of protein through the year was evaluated in 2 bat species in a seasonal forest in the neotropics using stable-isotope analysis of carbon and nitrogen. Artibeus jamaicensis, a frugivore, met almost all of its protein requirements from plants with no seasonal or sexual variation, In contrast, Glossophaga soricina, a nectarivore, relied mostly on insects, but in females, plants and insects were equally important in the early rainy season and in the mid dry season. Evidence of changes in food origin of protein associated with reproductive activity was not detected in either species MH - Canada MH - Mexico|Distrito Federal PB - PROVO: AMER SOC MAMMALOGISTS RP - NOT IN FILE U3 - TC 14 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000168879100008 L2 - Artibeus jamaicensis;dry forest;feeding habits;frugivory;Glossophaga soricina;isotope analysis;Mexico;nectarivory;protein requirements;CAROLLIA-PERSPICILLATA; TROPICAL WET; FRUIT BATS; COSTA-RICA; DIETS; NITROGEN; MEXICO; PHYLLOSTOMIDAE; CHIROPTERA; LOWLANDS SO - Journal of Mammalogy 2001 ;82(2):352-361 3197 UI - 13764 AU - Herrera LG AU - del Rio CM AU - Braun E AU - Hobson KA AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ, USAUniv Arizona, Dept Physiol, Tucson, AZ, USAUniv Saskatchewan, Dept Biol, Saskatoon, SK S7N 0W0, CanadaHobson, KA, Canadian Wildlife Serv, 115 Perimeter Rd, Saskatoon, SK S7N 0X4, Canada TI - Renal structure in neotropical bats: Using stable isotopes to explore relationships between diet and morphology AB - The relationship between kidney structure and diet was examined in several species of bats from the tropics. The trophic level of the bats was determined by their stable nitrogen isotopic composition (delta N-15). The results indicate that the relative thickness of the renal medulla is directly related to the trophic level of the bats. Additionally, we also determined the relationship between body mass and kidney structure. Relative medullary thickness was reciprocally related to body mass in animalivorous bats but no relationship was found in phytophagous bats. Stable isotope analysis provided a quantitative approximation of diet to test its relationship with kidney structure MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Environmental Sciences U5 - J;Article AV - English IS - 1025-6016 UR - ISI:000168564100001 L2 - allometric relationships;bats;diet;kidney morphology;natural variations;nitrogen-15;CONCENTRATING ABILITY; ECOLOGY; CARBON SO - Isotopes in Environmental and Health Studies 2001 ;37(1):1-11 3198 UI - 12095 AU - Herrera R AU - Jimenez-Vazquez HA AU - Modelli A AU - Jones D AU - Soderberg BC AU - Tamariz J AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Organ Chem, Mexico City 11340, DF, MexicoUniv Bologna, Dept Chem G Ciamician, I-40126 Bologna, ItalyIst Composti Carbonio Contenenti Eteroatomi, CNR, I-40129 Bologna, ItalyW Virginia Univ, Dept Chem, Morgantown, WV 26506, USATamariz, J, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Organ Chem, Prol Carpio & Plan Ayala, Mexico City 11340, DF, Mexico TI - Synthesis of new captodative alkenes: Alkyl 2-aroyloxy acrylates structure, and reactivity in Diels-Alder cycloadditions AB - Novel captodative alkenes, namely the methyl and ethyl esters of 2-aroyloxyacrylic acids, 2 and 3, have been prepared. Their reactivity and selectivity have been evaluated in Diels-Alder cycloadditions with unsymmetrical dienes, which generate the corresponding adducts with high regioselectivity. No significant stereoselectivity was observed in the reaction with cyclopentadiene (9), although Lewis acid catalysis improved the exo/endo isomeric ratio. Structural and electron spectroscopic studies of these alkenes are supported by MO calculations. FMO theory accounts for the regioselectivity observed with isoprene (7), and the reactivity seen in Diels-Alder additions correlates with the stabilization of the relevant vacant pi . MO in these alkenes, which is mainly due to the electron-withdrawing group MH - Italy MH - Mexico|Distrito Federal MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000172948100010 L2 - captodative alkenes;cycloadditions;photoelectron spectroscopy;DENSITY-FUNCTIONAL THEORY; LEWIS-ACID CATALYSIS; TRANSITION-STATES; 1,3-DIPOLAR CYCLOADDITIONS; CYCLO-ADDITIONS; ELECTRON-IMPACT; OLEFINS; CYCLOPENTADIENE; DERIVATIVES; PREDICTION SO - European Journal of Organic Chemistry 2001 ;(24):4657-4669 3199 UI - 14497 AU - Hershberg R AU - Bejerano G AU - Santos-Zavaleta A AU - Margalit H AD - Hebrew Univ Jerusalem, Hadassah Med Sch, Dept Mol Genet & Biotechnol, IL-91120 Jerusalem, IsraelHebrew Univ Jerusalem, Sch Comp Sci & Engn, IL-91120 Jerusalem, IsraelUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoMargalit, H, Hebrew Univ Jerusalem, Hadassah Med Sch, Dept Mol Genet & Biotechnol, POB 12272, IL-91120 Jerusalem, Israel TI - PromEC: An updated database of Escherichia coli mRNA promoters with experimentally identified transcriptional start sites AB - PromEC is an updated compilation of Escherichia coli mRNA promoter sequences. It includes documentation on the location of experimentally identified mRNA transcriptional start sites on the E. coli chromosome, as well as the actual sequences in the promoter region. The database was updated as of July 2000 and includes 472 entries. PromEC is accessible at http:// bioinfo.md.huji.ac.il//marg/promec MH - Israel MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 26 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000166360300075 SO - Nucleic Acids Research 2001 ;29(1):277-277 3200 UI - 12653 AU - Herzka SZ AU - Holt SA AU - Holt GJ AD - Univ Texas, Inst Marine Sci, Port Aransas, TX 78373, USAHerzka, SZ, CICESE, Dept Ecol, Ensenada, Baja California, Mexico TI - Documenting the settlement history of individual fish larvae using stable isotope ratios: model development and validation AB - The delta C-13 and/or delta N-15 of newly settled fish larvae should change from a planktonic signature to one reflecting estuarine food sources following settlement from pelagic to demersal nursery habitat. An empirical model based on measurements of delta C-13 and delta N-15 was used to estimate size at settlement (L-sett) and time since settlement (T-sett) for red drum (Sciaenops ocellatus; Sciaenidae), an estuarine-dependent species whose larvae migrate from coastal areas to shallow seagrass habitat in estuaries. The model relies on (1) the isotopic composition of the larvae prior to a dietary switch and following equilibration to a new food source, (2) growth rate measurements and (3) estimates of the contribution of metabolic turnover to isotopic change. To test the model, a settlement event was simulated by transferring settlement-size larvae (6 mm standard length; SL) reared in the laboratory to cages deployed in nursery habitat in the Aransas Estuary, TX, USA. Most of the changes in delta C-13 and delta N-13 (ca. 10 parts per thousand for both) occurring over the 15-day study period were attributed to growth, although metabolic turnover significantly accelerated the rate of isotopic change. When growth and metabolic turnover were incorporated into the model, accurate estimates of L-sett (within 1 mm SL) and T-sett (within 1-2 days) were generated. The isotopic composition of wild-caught pre- and post-settlement larvae collected during a 2-week period was also characterized. Variability in the delta C-13 and delta N-15 of potential settlers as a function of size and sampling location was small (< 1 parts per thousand), although there were temporal differences. For part of the study period, there was a distinct difference between the delta C-13 of newly settled larvae (-19.3 parts per thousand) and "large" individuals that had equilibrated to estuarine foods (-16.5 parts per thousand). Nitrogen could not be used as a tracer of settlement due to the absence of differences in delta N-15 of pre- and post-settlement larvae. The carbon data was used to estimate size and time since settlement. The most abundant L-sett for wild-caught fish was 5-6 mm SL. Using published growth rates for post-settlement red drum in the study area, it was estimated that settlement events occurred over several consecutive days. The estimates of size and time since settlement were sensitive to the effect of metabolic turnover, the isotopic composition of pre-settlement red drum and growth rate. Utilization of stable isotope ratios allows for the finer temporal resolution of the settlement dynamics of marine fish species. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000171503900004 L2 - fish larvae;settlement;stable isotope ratios;turnover;Sciaenops ocellatus;SUBTROPICAL SEAGRASS MEADOWS; DRUM SCIAENOPS-OCELLATUS; RED DRUM; SPATIAL VARIABILITY; PHYSICAL PROCESSES; SHRIMP MIGRATIONS; NORTHERN GULF; REEF FISH; FOOD-WEB; RECRUITMENT SO - Journal of Experimental Marine Biology and Ecology 2001 ;265(1):49-74 3201 UI - 13706 AU - Hicks ME AU - Gomez-Flores R AU - Wang CG AU - Mosberg HI AU - Weber RJ AD - Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Sect Med Sci, Peoria, IL 61656, USAUniv Michigan, Coll Pharm, Ann Arbor, MI 48109, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, San Nicolas De Los Garza 66451, NL, MexicoWeber, RJ, Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Sect Med Sci, 1 Illini Dr,Box 1649, Peoria, IL 61656 USA TI - Differential effects of the novel non-peptidic opioid 4-tyrosylamido-6-benzyl-1,2,3,4 tetrahydroquinoline (CGPM-9) on in vitro rat t lymphocyte and macrophage functions AB - Opioid receptors have been reported on immune cells of several species and shown to subserve effector functions of these cell types. Mu-selective opioid agonists such as morphine are immunosuppressive, whereas certain 6-opioid receptor-selective agonists have been associated with immunopotentiation. We have previously shown that intracerebroventricular administration of the non-peptidic 6-opioid receptor agonists did not alter certain parameters of immunocompetence. In this study, we evaluated the in vitro effects of the novel non-peptidic opioid 4-tyrosylamido-6-benzyl-1,2,3,4 tetrahy-droquinoline (CGPM-9) on lymphocyte and macrophage functions. We demonstrated that CGPM-9 enhanced rat thymic lymphocyte proliferative response to concanavalin A (2.85- to 5.5-fold increases), and suppressed LPS-induced nitric oxide (67 to 72 percent reduction) and TNF-alpha production (46 percent reduction) by peritoneal macrophages, compared with untreated control. The mu -opioid receptor selective antagonist CTOP used at equimolar doses, significantly suppressed the effect of CGPM-9 on lymphocyte and macrophage functions (CTOP alone did not show any effect on lymphocyte or macrophage functions). In summary, CGPM-9 activated thymic lymphocyte proliferation and suppressed macrophage functions by acting at mu -opioid receptors. This suggests that opioid receptors on immunocytes may be coupled to different signaling pathways depending on the cell type and effector function being analyzed. The mechanism(s) associated with the differential effect of CGPM-9 on these immune cells remains to be elucidated. The pharmacotherapeutic potential for compounds such as CGPM-9 which potentiate T lymphocyte proliferation and suppress production of macrophage-derived inflammatory cytokines is substantial in research and clinical medicine. (C) 2001 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000168709300005 L2 - opioids;immunity;mu-opioid agonist;lymphocytes;macrophages;proliferation;nitric oxide;tumor necrosis factor-alpha;MURINE PERITONEAL-MACROPHAGES; TUMOR-NECROSIS-FACTOR; NITRIC-OXIDE; NATURAL-KILLER; TNF-ALPHA; IFN-GAMMA; MORPHINE; PROLIFERATION; SUPPRESSION; RECEPTORS SO - Life Sciences 2001 ;68(24):2685-2694 3202 UI - 13485 AU - Hidalgo-Mihart MG AU - Cantu-Salazar L AU - Lopez-Gonzalez CA AU - Martinez-Meyer E AU - Gonzalez-Romero A AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoNo Rockies Conservat Cooperat, Jackson, WY 83001, USAUniv Kansas, Dept Geog, Lawrence, KS 66045, USAHidalgo-Mihart, MG, Inst Ecol AC, Apdo Postal 63, Xalapa 91000, Veracruz, Mexico TI - Coyote (Canis latrans) food habits in a tropical deciduous forest of western Mexico AB - We studied the food habits of the coyote (Canis latrans) in a tropical deciduous forest along the Mexican Pacific coast during 1996 and 1997. Small mammals, chiefly the Jaliscan cotton rat (Sigmodon,mascotensis), were the main prey items during the dir season. Cultivated fruits, like mango and papaya, were the most important food fur coyotes during the wet season. Given the importance in our study area of human related food items like the Jaliscan cotton rat, mango and papaya, we expect the expansion of coyote populations due to deforestation of the tropical deciduous forest MH - Mexico|Veracruz MH - USA PB - NOTRE DAME: AMER MIDLAND NATURALIST RP - NOT IN FILE U3 - TC 8 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0003-0031 UR - ISI:000169313300020 L2 - DIETS; DESERT; TEXAS SO - American Midland Naturalist 2001 ;146(1):210-216 3203 UI - 13205 AU - Hietz P AU - Briones O AD - Agr Univ Vienna, Inst Bot, A-1180 Vienna, AustriaInst Ecol, Xalapa 91000, Veracruz, MexicoHietz, P, Agr Univ Vienna, Inst Bot, Gregor Mendel Str 33, A-1180 Vienna, Austria TI - Photosynthesis, chlorophyll fluorescence and within-canopy distribution of epiphytic ferns in a Mexican cloud forest AB - Parameters associated with the photosynthetic performance of eight common epiphytic ferns in a Mexican cloud forest were investigated in relation to the distribution of these species within the canopy. If the substantial microclimatic gradients within tropical forest canopies provide microhabitats exploited by different epiphytic species, we would expect to find correlations between distribution and physiological traits. Maximum rates of CO, uptake (A,,,) and photon flux densities at light compensation points (LCP) were in the range of shade plants (A(max) = 0.6-5.2 mu mol m(-2) s(-1); LCP=4-6.5 mu mol m(-2) s(-1)), but saturation light intensities were more typical for sun plants (270-550 mu mol m(-2) s(-1)). A(max), and nitrogen content per unit dry weight were correlated with the distribution of the species within the canopy, but LCP, apparent quantum yield and dark respiration were not. When leaves were left to desiccate, the fluorescence yield of dark-adapted leaves (Y-0) remained high until the relative water content (RWC) had dropped below 30 to 20%. Fluorescence after short illumination with 200 mu mol m(-2) s(-1) declined when RWC dropped below 70 to. 40%. After exposure to full sunlight for 1 h, Y-0 of species growing in the outer canopy (Pleopeltis mexicana and Polypodium plebeium) and a plant characteristic of the mid-canopy (Elaphoglossum petiolatum) recovered better than in species from shadier locations (Trichomanes bucinatum, Asplenium cuspidatum, Phlebodium areolatum). With the exception of Ph. areolatum and a species growing at both exposed and shaded sites (Polypodium puberulum), Y-0 recovered at least partially after a loss of 80-96% of saturation water, with the humidity-loving filmy fern (T. bucinatum) showing no signs of permanent damage at all. The results suggest that tolerance or avoidance of desiccation and high light may be at least as important in controlling the distribution of the species studied as photosynthetic performance without stress MH - Austria MH - Mexico|Veracruz PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 1435-8603 UR - ISI:000170025900009 L2 - chlorophyll fluorescence;epiphyte;ferns;photosynthesis;water content;RAIN-FOREST; VASCULAR EPIPHYTES; WATER RELATIONS; GUZMANIA-MONOSTACHIA; CO2 ASSIMILATION; LIFE-FORMS; LIGHT; RESPONSES; ECOLOGY; PLANTS SO - Plant Biology 2001 ;3(3):279-287 3204 UI - 13715 AU - Hill CG AU - Ghannouchi S AU - Garcia HS AD - Univ Wisconsin, Dept Chem Engn, Madison, WI 53706, USAUNIDA, Inst Tecnol Veracruz, Veracruz, Ver, MexicoHill, CG, Univ Wisconsin, Dept Chem Engn, 1415 Engn Dr, Madison, WI 53706 USA TI - Lipolysis of butter oil by immobilized lamb pregastric esterase: I. Uniresponse kinetics - pH and temperature effects AB - Lamb pregastric esterase, immobilized by physical adsorption on microporous polypropylene in a hollow fiber reactor, has been employed to effect the continuous hydrolysis of the triglycerides in butter oil. Experimental data were obtained at temperatures from 35 to 45 degreesC and pH values from 5.5 to 6.5. The overall rate of hydrolysis was fastest at 40 degreesC and a pH of 6.0. Nonlinear regression methods were employed to determine the kinetic parameters of rate expressions based on a generic Ping-Pong Bi Bi mechanism. The best nonlinear fit of the data was consistent with a mechanism that assumes that acylation of the enzyme is the rate-limiting step in the hydrolysis reaction MH - USA MH - Mexico|Veracruz PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000168737500006 L2 - lamb pregastric esterase;lipolyzed butter oil;hollow fiber reactor;immobilized lipase;HOLLOW-FIBER REACTOR; CONJUGATED LINOLEIC-ACID; CANDIDA-CYLINDRACEA; MEMBRANE BIOREACTOR; LIPASE; HYDROLYSIS; ADSORPTION SO - Journal of Dairy Science 2001 ;84(5):1034-1043 3205 UI - 12451 AU - Hill TP AU - Perez-Abreu V AD - Georgia Inst Technol, Sch Math, Atlanta, GA 30332, USACtr Invest & Matemat, Guanajuato 36000, Mexico TI - Extreme-value moment goodness-of-fit tests AB - A general goodness-of-fit test for scale-parameter families of distributions is introduced, which is based on quotients of expected sample minima. The test is independent of the mean of the distribution, and, in applications to testing for exponentiality of data, compares favorably to other goodness-of-fit tests for exponentiality based on the empirical distribution function, regression methods and correlation statistics. The new minimal-moment method uses ratios of easily-calculated, unbiased, strongly consistent ET-statistics, and the general technique can be used to test many standard composite null hypotheses such as exponentiality, normality or uniformity (as well as simple null hypotheses) MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0020-3157 UR - ISI:000172037200009 L2 - goodness-of-fit;scale-parameter families;U-statistics;exponential family;composite exponential hypothesis;minimal moments;extreme values;EXPONENTIALITY SO - Annals of the Institute of Statistical Mathematics 2001 ;53(3):543-551 3206 UI - 13011 AU - Hingerl K AU - Balderas-Navarro RE AU - Bonanni A AU - Stifter D AD - Profactor GmbH, A-4400 Steyr, AustriaUniv Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, MexicoUniv Linz, Inst Halbleiterphys & Feskorperphys, A-1040 Vienna, AustriaHingerl, K, Profactor GmbH, Wehrgrabengasse 5, A-4400 Steyr, Austria TI - Influence of anisotropic in-plane strain on critical point resonances in reflectance difference data AB - The sharp resonances in reflectance difference spectroscopy (RDS) data at the critical points of the dielectric function of bulk semiconductors have been assigned to surface-bulk transitions. photon localization, or optical transitions from bound dimer states to excited dimer states. For the case of ZnTe, CdTe, and ZnSe, we present experimental data indicating that a uniaxial in-plane stress component induces sharp resonances at these critical points by lifting the degeneracy of the optical transitions at the A and Gamma points due to the resulting anisotropic strain. Even small stresses of about 1-5 MPa, or strains on the order of 1 X 10(-5) can be detected with RDS. (C) 2001 American Vacuum Society MH - Austria MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000170598400097 L2 - OPTICALLY ABSORBING MATERIALS; PHOTON-INDUCED LOCALIZATION; MOLECULAR-BEAM EPITAXY; SURFACE; SPECTROSCOPY; GAAS(001); SPECTRA; LAYERS; E-1+DELTA(1); GAAS(100) SO - Journal of Vacuum Science & Technology B-An International Journal Devoted to Microelectronics and Nanometer Structures-Processing Measurement and Phenomena 2001 ;19(4):1650-1657 3207 UI - 12196 AU - Hirata GA AU - Ramos F AU - Garcia R AU - Bosze EJ AU - McKittrick J AU - Contreras O AU - Ponce FA AD - Natl Autonomous Univ Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoUniv Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci Program, La Jolla, CA 92093, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAHirata, GA, Natl Autonomous Univ Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, Mexico TI - A new combustion synthesis method for GaN : Eu3+ and Ga2O3 : Eu3+ luminescent powders AB - New low-temperature methods to produce GaN:Eu and Ga2O3:Eu (0 less than or equal to x less than or equal to 1) highly-luminescent powders are presented. These procedures yield finely divided powders through exothermic reactions between the precursors. The preparation of Eu-doped Ga2O3 powders was achieved using a new combustion synthesis technique (hydrazine/metal-nitrate method). The process starts with aqueous solutions of Eu(NO3)(3) and Ga(NO3)3 as the precursors and hydrazine as (non-carbonaceous) fuel. A spontaneous combustion reaction occurs by increasing the temperature to between 150 and 200 degreesC in a closed vessel filled with argon, and produces (EuxGa1-x)(2)O-3 directly. The preparation of Eu-doped GaN uses the ammonium hexafluoro-metal method. The powders present strong luminescence associated with the dopant. A sharp and strong GaN luminescence is observed, indicative of high purity and crystallinity as determined by low-temperature cathodoluminescence. The composition and powder morphology have been studied using energy dispersive spectroscopy and scanning electron microscopy MH - Mexico|Baja California MH - USA PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 16 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000172686900037 SO - Physica Status Solidi A-Applied Research 2001 ;188(1):179-182 3208 UI - 12656 AU - Hirata GA AU - McKittrick J AU - Trkula M AU - Mourant J AU - Mourant J AU - Sze R AD - Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoLos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545, USALos Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545, USAMcKittrick, J, Univ Calif San Diego, Dept Mech & Aerosp Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA TI - Laser melting of photoluminescent (Y0.92EU0.08)(2)O-3 films AB - Fluorescent red-emitting (Y0.92Eu0.08)(2)O-3 films were deposited on sapphire substrates by the metallorganic chemical vapor deposition technique. The films were weakly luminescent in the as-deposited condition. The as-deposited films were composed of nanocrystals embedded in columnar grains. A KrF laser with ultraviolet (lambda =248 nm) pulses at a fluence level between 0.9 and 2.3 J/cm(2) was applied to different regions of the film. Increasing the energy fluence density initially increased the photoluminescence intensity but decreased it at the highest level. Transmission and scanning electron microscopy verified that surface melting and ablation occurred at all fluence levels. Computational modeling of the laser melting and ablation process predicted that a significant fraction of the film is removed by ablation at the highest fluence levels, thereby decreasing the photoluminescence intensity of the films due to the significant amount of material removed. (C) 2001 American Institute of Physics MH - USA MH - Mexico|Baja California PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000171562100036 L2 - CHEMICAL-VAPOR-DEPOSITION; AMORPHOUS-SILICON FILMS; EXCIMER-LASER; THIN-FILMS; CRYSTALLIZATION; LUMINESCENCE; PHOSPHORS; GROWTH SO - Journal of Applied Physics 2001 ;90(8):3919-3924 3209 UI - 12076 AU - Ho JS AU - Gomez S AD - Calif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840, USAUnidad Acad Mzatlan, Inst Ciencias Mar & Limnol, Sinaloa, MexicoHo, JS, Calif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840 USA TI - Redescription of Lepeophtheirus marginatus Bere, 1936 (Copepoda : Caligidae) and relegation of L-christianensis Wilson, 1944 and L-orbicularis Shiino, 1960 as its synonyms AB - Lepeophtheirits marginatus Bere, 1936 is redescribed based on examination of type specimens. Studying the type materials of L. christianensis Wilson, 1944 and L. orbicularis Shiino, 1965 from sea catfish (Galeichthyes sp.) collected in the Gulf of Mexico and Peru, respectively, led us to recommend relegating both of them as synonyms of L. marginatus Bere MH - USA MH - Mexico|Sinaloa PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000172948000007 SO - Proceedings of the Biological Society of Washington 2001 ;114(4):897-906 3210 UI - 12674 AU - Ho JS AU - Gomez S AU - Fajer-Avila E AD - Calif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840, USAInst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan 82040, Sinaloa, MexicoCIAD, Unidad Mazatlan Acuicultura & Mancjo Ambient, Mazatlan 82010, Sinaloa, MexicoHo, JS, Calif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840 USA TI - Lepeophtheirus simplex sp n., a caligid copepod (Siphonostomatoida) parasitic on "botete" (bullseye puffer, Sphoeroides annulatus) in Sinaloa, Mexico AB - A new species of caligid copepod, Lepeophtheirus simplex sp. n., parasitic on bullseye puffer, Sphoeroides annulatus (Jenyns) in Sinaloa, Mexico is described. The new species is distinguished from its congeners by the possession of (1) a maxillule with simple dentiform process; (2) a sternal furca with sharply pointed, curved tines; (3) a 2-segmented exopod of leg 3 with simple, slender spine on proximal segment; (4) a 3-segmented exopod of leg 4 with a long proximal, outer spine; and (5) the terminal claw of male antenna with a large, tridentate, medial protuberance MH - USA MH - Mexico|Sinaloa PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 1 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000171437400011 L2 - Lepeophtheirus simplex;fish parasite;parasitic copepod;Caligidae;Mexico SO - Folia Parasitologica 2001 ;48(3):240-248 3211 UI - 12822 AU - Ho MH AU - Smith VH AU - Sagar RP AU - Esqivel RO AD - Queens Univ, Dept Chem, Kingston, ON K7L 3N6, CanadaUniv Autonoma Metropolitana, Dept Quim, Mexico City 09340, DF, MexicoSmith, VH, Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada TI - Asymptotic behaviour of the ratio of density gradient to electron density for atomic systems AB - The asymptotic behaviour of the negative ratio of the density gradient to the electron density, q (r), for neutral and singly charged atoms has been investigated. The results show that, for large r, q(r) can approach its limit root8 epsilon, where epsilon is the first ionization potential, from either above or below depending on the specific system considered MH - Canada MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000171032300003 SO - Molecular Physics 2001 ;99(20):1727-1728 3212 UI - 12371 AU - Hoang MP AU - Murakata LA AU - Padilla-Rodriguez AL AU - bores-Saavedra J AD - Univ Texas, SW Med Ctr, Dept Pathol, Div Anat Pathol, Dallas, TX 75235, USAArmed Forces Inst Pathol, Dept Hepat & Gastrointestinal Pathol, Washington, DC 20306, USAGen Hosp, Pathol Unit, Mexico City, DF, MexicoAlbores-Saavedra, J, Univ Texas, SW Med Ctr, Dept Pathol, Div Anat Pathol, 5323 Harry Hines Blvd, Dallas, TX 75235 USA TI - Metaplastic lesions of the extrahepatic bile ducts: A morphologic and immunohistochemical study AB - Although metaplastic changes can occur in the extrahepatic bile ducts, a detailed morphologic study of these lesions has not been done. We examined the bile duct mucosa in 42 pancreadcoduodenectomy specimens, 32 with neoplastic lesions and ten with inflammatory lesions of the extrahepatic bile ducts, to assess the prevalence and type of metaplastic lesions. For comparison, the common bile ducts from 10 autopsy cases were reviewed. Twenty of the 42 total cases (48%), 13 of the 32 neoplastic cases (40%), and 7 of the 10 inflammatory cases (70%) had metaplastic changes. Pyloric gland metaplasia was the most common type (16/20 cases; 80%), whereas intestinal metaplasia was seen in 1/20 cases (5%). A combination of pyloric gland and intestinal metaplasia occurred in 2/20 cases (10%), and squamous metaplasia plus the above-mentioned two types of metaplasia was seen in 1/20 cases (5%). None of the normal common bile ducts obtained from ten autopsies had metaplastic changes. Endocrine cells were identified in nine (56%) of 17 metaplastic lesions. In contrast, endocrine cells within the intramural glands were seen in only 2 of the 10 normal common bile ducts. Although a significant proportion of carcinomas (6/13 cases) was in close proximity to areas of metaplasia, we were unable to find dysplastic foci within the metaplastic glands or the metaplastic surface epithelium. Reactive atypical cells involved the surface biliary epithelium and intramural glands and were associated with inflammation and metaplastic changes. The presence of goblet, mucinous, squamous, and reactive atypical cells in association with hyperplasia of intramural glands in frozen sections or small biopsy specimens may be mistaken for malignancy; hence, recognition of these lesions is of diagnostic importance MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 8 U4 - Pathology U5 - J;Article AV - English IS - 0893-3952 UR - ISI:000172160400008 L2 - extrahepatic bile duct;intestinal metaplasia;metaplasia;pyloric gland metaplasia;squamous metaplasia;PRIMARY SCLEROSING CHOLANGITIS; CHRONIC ULCERATIVE-COLITIS; BILIARY-TRACT; CARCINOMA; DYSPLASIA SO - Modern Pathology 2001 ;14(11):1119-1125 3213 UI - 13265 AU - Hojat M AU - Nasca TJ AU - Cohen MJM AU - Fields SK AU - Rattner SL AU - Griffiths M AU - Ibarra D AU - de Gonzalez AAG AU - Torres-Ruiz A AU - Ibarra G AU - Garcia A AD - Thomas Jefferson Univ, Jefferson Med Coll, Ctr Res Med Educ & Hlth Care, Philadelphia, PA 19107, USAThomas Jefferson Univ, Coll Hlth Profess, Philadelphia, PA 19107, USAMexican Inst Social Secur, Mexico City, DF, MexicoAutonomous Univ Nuevo Leon, Jose E Gonzalez Univ Hosp, Monterrey, NL, MexicoAutonomous Univ Nuevo Leon, Sch Med, Dept Psychiat, Monterrey, NL, MexicoNatl Inst Neurol & Neurosurg Manuel Velosco Suare, Div Psychiat, Mexico City, DF, MexicoAngeles Enterprise Grp, Mexico City, DF, MexicoHosp Angeles del Pedregal, Mexico City, DF, MexicoHojat, M, Thomas Jefferson Univ, Jefferson Med Coll, Ctr Res Med Educ & Hlth Care, 1025 Walnut St, Philadelphia, PA 19107 USA TI - Attitudes toward physician-nurse collaboration: A cross-cultural study of male and female physicians and nurses in the United States and Mexico AB - Background: Inter-professional collaboration between physicians and nurses, within and between cultures, can help contain cost and insure better patient outcomes. Attitude toward such collaboration is a function of the roles prescribed in the culture that guide professional behavior. Objectives: The purpose of the study was to test three research hypotheses concerning attitudes toward physician-nurse collaboration across genders, disciplines, and cultures. Method: The Jefferson Scale of Attitudes Toward Physician-Nurse Collaboration was administered to 639 physicians and nurses in the United States (n = 267) and Mexico (n = 372). Attitude scores were compared by gender (men, women), discipline (physicians, nurses), and culture (United States, Mexico) by using a three-way factorial analysis of variance design. Results: Findings confirmed the first research hypothesis by demonstrating that both physicians and nurses in the United States would express more positive attitudes toward physician-nurse collaboration than their counterparts in Mexico. The second research hypothesis, positing that nurses as compared to physicians in both countries would express more positive attitudes toward physician-nurse collaboration, was also supported. The third research hypothesis that female physicians would express more positive attitudes toward physician-nurse collaboration than their male counterparts was not confirmed. Conclusions: Collaborative education for medical and nursing students, particularly in cultures with a hierarchical model of inter-professional relationship, is needed to promote positive attitudes toward complementary roles of physicians and nurses. Faculty preparation for collaboration is necessary in such cultures before implementing collaborative education MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Nursing U5 - J;Article AV - English IS - 0029-6562 UR - ISI:000169918000008 L2 - attitudes;cross-cultural comparisons;physician-nurse collaboration;role theory;CARE SO - Nursing Research 2001 ;50(2):123-128 3214 UI - 13510 AU - Holguin G AU - Glick BR AD - Univ Waterloo, Dept Biol, Waterloo, ON N2L 3G1, CanadaCtr Invest Biol Noroeste, CIBNOR, Dept Microbiol, La Paz 23000, BCS, MexicoGlick, BR, Univ Waterloo, Dept Biol, Waterloo, ON N2L 3G1, Canada TI - Expression of the ACC deaminase gene from Enterobacter cloacae UW4 in Azospirillum brasilense AB - The ACC deaminase structural gene (acdS) from Enterobacter cloacae UW4 was cloned in the broad host range plasmid pRK415 under the control of the lac promoter and transferred into Azospirillum brasilense Cd and Sp245. A. brasilense Cd and Sp245 transformants showed high ACC deaminase activity, similar to that observed in Enterobacter cloacae UW4. The expression of ACC deaminase improved the existing growth promoting activity of Azospirillum. The roots of tomato and canola seedlings were significantly longer in plants inoculated with A. brasilense Cd transformants than those in plants inoculated with the nontransformed strains of the same bacterium. In the case of wheat seedlings, inoculation with A. brasilense Cd transformants did not promote root growth. The difference in plant response (canola and tomato versus wheat) is attributed to the greater sensitivity of canola and tomato plants to ethylene as compared to wheat plants MH - Canada MH - Mexico|Baja California Sur PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Ecology;Marine & Freshwater Biology;Microbiology U5 - J;Article AV - English IS - 0095-3628 UR - ISI:000169272400010 L2 - PSEUDOMONAS-PUTIDA GR12-2; PLANT-GROWTH; 1-AMINOCYCLOPROPANE-1-CARBOXYLIC ACID; SPIRILLUM-LIPOFERUM; ROOT ELONGATION; INOCULATION; SEEDLINGS; BACTERIA; BIOSYNTHESIS; RHIZOSPHERE SO - Microbial Ecology 2001 ;41(3):281-288 3215 UI - 13947 AU - Hollenbach JA AU - Thomson G AU - Cao K AU - Fernandez-Vina M AU - Erlich HA AU - Bugawan TL AU - Winkler C AU - Winter M AU - Klitz J AD - Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720, USAAmer Red Cross, Baltimore, MD, USARoche Mol Syst, Alameda, CA, USANCI, Frederick Canc Res & Dev Ctr, Intramural Res Support Program, SAIC Frederick, Frederick, MD, USAInst Nacl Anthropol & Hist, Oaxaca, MexicoUniv Calif Berkeley, Calif Sch Publ Hlth, Childrens Hosp, Oakland Res Inst, Berkeley, CA 94720, USAHollenbach, JA, Univ Calif Berkeley, Dept Integrat Biol, 3060 VLSB, Berkeley, CA 94720 USA TI - HLA diversity, differentiation, and haplotype evolution in mesoamerican natives AB - Genetic variation of the Human Leukocyte Antigen region (HLA) in three Amerindian populations from the Southern Mexican state of Oaxaca, the Zapotec, Mixtec and the Mire is examined. Individuals were typed using PCR-SSOP for four class II loci (DRB1, DQA1, DQB1, DPB1)and three class I loci (HLA-A, -B, and -C). Based on known HLA distributions, European admixture ranged from 1% to 10%. Individuals with European alleles were excluded from subsequent analysis. New alleles were revealed at each of the class I loci. In general, genotype frequencies were in Hardy-Weinberg equilibrium, although some deviations were detected. Allele frequency distributions at the DRB1. DQA1, DQB1 and HLA-A loci in all populations were more even than expected under neutrality, supporting a model of balancing selection at these loci. A history of directional selection for DPB1 in all three populations was indicated, as homozygosity values were significantly above expected values. Allele frequency distributions at HLA-B and HLA-C did not differ significantly from neutrality expectations. The data also provide evidence from linkage disequilibrium that strong haplotypic associations are present across the entire HLA region in each of the populations. Significant overall linkage disequilibrium exists between all pairs of loci typed in these populations, except those which include the DPB1 locus. These associations exist despite the fact that the recombination fraction between HLA-A, in the class I region, and DQB1, in the class II region, may exceed 0.02. One explanation is that selective pressures are maintaining the relationships between particular alleles at these loci in these populations. These relationships are maintained in general across the entire HLA region in the Oaxacan Amerindians, with the exception of DPB1. (C) American Society for Histocompatibility and Immunogenetics, 2001. Published by Elsevier Science Inc MH - USA MH - Mexico|Oaxaca PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 31 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000168062900010 L2 - Amerindian;HLA;haplotype;linkage disequilibrium;CLASS-II POLYMORPHISM; AMERICAN INDIAN TRIBES; LINKAGE DISEQUILIBRIUM; PCR AMPLIFICATION; OLIGONUCLEOTIDE PROBES; EXPEDICION-HUMANA; AMERINDIAN GROUPS; B ALLELES; A-LOCUS; POPULATIONS SO - Human Immunology 2001 ;62(4):378-390 3216 UI - 11942 AU - Holroyd GL AU - Rodriguez-Estrella R AU - Sheffield SR AD - Canadian Wildlife Serv, Edmonton, AB T6B 2X3, CanadaCtr Invest Biol Noroeste, La Paz 23090, BCS, MexicoUS Fish & Wildlife Serv, Arlington, VA 22203, USAGeorge Mason Univ, Dept Biol, Fairfax, VA 22030, USAHolroyd, GL, Canadian Wildlife Serv, Room 200,4999-98 Ave, Edmonton, AB T6B 2X3, Canada TI - Conservation of the Burrowing Owl in western North America: Issues, challenges, and recommendations AB - Burrowing Owls (Athene cunicularia) are undergoing mild to relatively severe local and regional population declines throughout much of western North America. In Canada, Burrowing Owls are declining precipitously and are listed as endangered. In the United States of America, Burrowing Owls continue to decline in many states, but they are not listed federally. In Mexico, there is little quantitative data, but the species is listed as threatened. Here, we propose a conservation plan with five major action components: status, management and conservation, education, research, and administration. Given continued declines of Burrowing Owls in many parts of western North America, we urge increased cooperation among interested agencies and organizations to implement effective conservation of this species MH - Canada MH - Mexico|Baja California Sur MH - USA PB - HASTINGS: RAPTOR RESEARCH FOUNDATION INC RP - NOT IN FILE U3 - TC 14 U4 - Ornithology U5 - J;Article AV - English IS - 0892-1016 UR - ISI:000173424900020 L2 - Burrowing Owl;Athene cunicularia;conservation;population decline;status;sciurid;international cooperation;Canada;Mexico;United States of America;North America SO - Journal of Raptor Research 2001 ;35(4):399-407 3217 UI - 13007 AU - Hong HP AU - Beadle S AU - Escobar JA AD - Univ Western Ontario, Dept Civil & Environm Engn, London, ON N5A 6B9, CanadaNatl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoHong, HP, Univ Western Ontario, Dept Civil & Environm Engn, London, ON N5A 6B9, Canada TI - Probabilistic assessment of wind-sensitive structures with uncertain parameters AB - Studies of Davenport and others have provided the basis for a simple gust factor approach to evaluate the wind-induced structural responses. This approach is based on the maximum responses that can be represented by their corresponding mean maximum response. However, the uncertainty in the wind characteristics and in the material properties and geometry variables affects not only the mean maximum responses but also their variability. By considering these uncertainties, estimates of the statistics of the maximum responses can be obtained from the unconditional probability distributions of the maximum responses. Alternatively, they can be obtained directly from the uncertainty propagation analysis based on the conditional mean maximum responses. The fort-ner is accurate whereas the latter is an approximation. The adequacy of this approximation and its effect on the structural reliability are investigated. Results reported in this study seem to support that the use of the conditional maximum response equal to the mean maximum response is adequate for the uncertainty propagation analysis. Results of the reliability analyses also suggest that the consideration of the uncertainty in structural parameters such as the fundamental period of vibration and the damping ratio is very important for serviceability limit states, and that these uncertainties may be ignored for the resistance based limit states as long as the structure behaves linearly. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Civil;Mechanics U5 - J;Article AV - English IS - 0167-6105 UR - ISI:000170632700004 L2 - uncertainty propagation;simulation;reliability;point-like structure;line-like structure;EXTREME WINDS SO - Journal of Wind Engineering and Industrial Aerodynamics 2001 ;89(10):893-910 3218 UI - 14111 AU - Hoover RS AU - Monroy A AU - Vazquez N AU - Gamba G AU - Hebert SC AD - Yale Univ, Sch Med, New Haven, CT 06520, USANatl Autonomous Univ Mexico, Mexico City 04510, DF, Mexico TI - Mutations of protein kinase C (PKC) phosphorylation sites in the rat thiazide-sensitive sodium chloride cotransporter (rTSC) cause gain of function MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438100822 SO - Faseb Journal 2001 ;15(4):A145-A145 3219 UI - 12708 AU - Horowitz YS AU - Avila O AU - Rodriguez-Villafuerte M AD - Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelNatl Autonomous Univ Mexico, Inst Fis, Mexico City 04510, DF, MexicoInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoHorowitz, YS, Ben Gurion Univ Negev, Dept Phys, POB 653, IL-84105 Beer Sheva, Israel TI - Theory of heavy charged particle response (efficiency and supralinearity) in TL materials AB - We describe the theory of heavy charged particle (HCP) response (efficiency and supralinearity) in thermoluminescent (TL) materials. The HCP TL relative efficiency is treated in the framework of modified track structure theory (MTST) using Monte Carlo (MC) calculations of radial dose distributions in condensed phase LiF. HCP TL fluence response is modelled in the framework of the extended track interaction model (ETIM) which treats both HCP fluence response supralinearity and saturation using trapping centre (TC) and luminescent centre (LC) radial occupation density profiles. These are based on the MC radial dose distributions and experimental measurements of optical absorption and sensitisation dose response. Analytical ETIM calculations (up to fourth-order nearest-neighbour track interactions) are used to model the TL fluence response of the components of composite peak 5 in LiF:Mg,Ti (TLD-100). Monte Carlo track interaction calculations (MCTIM) are also described which can model even higher-order nearest-neighbour track interactions appropriate to the high temperature peaks in LiF:Mg,Ti (TLD-100), and as well, model the HCP TL fluence response in both parallel and non-parallel HCP beam geometries. (C) 2001 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 31 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000171341100006 L2 - TRACK-INTERACTION-MODEL; LOW-ENERGY PROTONS; MCP-N DETECTORS; THERMOLUMINESCENT RESPONSE; LIF-MG,TI TLD-100; ALPHA-PARTICLES; RADIATION-FIELD; VECTOR PROPERTIES; LITHIUM-FLUORIDE; IONS SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2001 ;184(1-2):85-112 3220 UI - 12868 AU - Horowitz YS AU - Satinger D AU - Oster L AU - Issa N AU - Brandan ME AU - Avila O AU - Rodriguez-Villafuerte M AU - Gamboa-deBuen I AU - Buenfil AE AU - Ruiz-Trejo C AD - Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelNegev Acad Coll Engn, Beer Sheva, IsraelUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoHorowitz, YS, Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel TI - The extended track interaction model: supralinearity and saturation He-ion TL fluence response in sensitized TLD-100 AB - The dependence of the thermoluminescence (TL) dose response on ionization density continues to be a subject of major importance from both theoretical and applied considerations. The supralinearity of heavy charged particle (HCP) TL-fluence response has been previously mathematically modelled in the framework of the track interaction model (TIM) and incorporated into the unified interaction model (UNIM) which treats all particle and radiation species in a unified mathematical and conceptual framework. In this paper we discuss an extended track interaction model (ETIM), developed to describe supralinearity, saturation, and sensitization in TL response to heavy charged particles (HCPs), and we apply the model to peak 5 in sensitized LiF : Mg, Ti (TLD-100). Track-segment HCP radial dose profiles for He ions slowing down in condensed phase LiF are calculated via Monte Carlo techniques. Defect occupation probabilities as a function of radial distance from the track axis are calculated from the appropriate optical absorption gamma dose response for the trapping centers (TCs) and sensitization gamma dose response for the luminescent centers (LCs). Saturation in HCP TL-fluence response is described as arising from the overlap of track cores in which the defect centers are heavily occupied. The track cores are characterized by two parameters, r(100) and r(50), defining the radial distance from the HCP track axis up to which defect centers are fully occupied and 50% occupied, respectively. From measurements of the He ion-TL fluence response for peak 5 in sensitized LiF : Mg, Ti (TLD-100), it is demonstrated that r(50) equals 38 rim for 6.8 MeV He ions appropriate to a value of the dose filling constant of beta = 6 x 10(-3) Gy(-1) compared to values of beta = 0.9 x 10(-3) and 3.1 x 10(-3) Gy(-1) for the TCs and LCs, respectively. This high value of beta suggests that the TL fluence saturation of peak 5 arises from full occupancy of the available LCs and not the TCs. Further studies are required to analyze the possible dependence of the optical absorption dose filling constants on ionization density and on the level of occupation of the competing centers. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000170916000002 L2 - THERMO-LUMINESCENCE; LIF-MG,TI TLD-100; OPTICAL-ABSORPTION; THERMOLUMINESCENT RESPONSE; RADIATION-FIELD; LIF TLD-100; GLOW CURVE; PEAK-5; EFFICIENCY; DOSIMETRY SO - Radiation Measurements 2001 ;33(5):459-473 3221 UI - 11939 AU - Hortal M AU - Lovgren M AU - De la Hoz F AU - Agudelo CI AU - Brandileone MC AU - Camou T AU - Casagrande S AU - Castaneda E AU - Corso A AU - Echaniz G AU - Hormazabal JC AU - Pace J AU - Palacio R AU - Perez-Giffoni G AU - Ruvinsky R AU - Di Fabio JL AD - Minist Salud, Dept Maternoinfantil, Montevideo 11300, UruguayMinist Salud, Lab Salud Publ, Montevideo 11300, UruguayProv Lab Publ Hlth, Natl Ctr Streptococcus, Edmonton, AB, CanadaInst Nacl Salud, Bogota, ColombiaInst Adolfo Lutz Registro, Sao Paulo, BrazilInst Nacl Enfermedades Infecciosas, ANLIS, Buenos Aires, DF, ArgentinaInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoInst Salud Publ Chile, Santiago, ChilePan Amer Hlth Org, Special Program Vaccines & Immunizat, Washington, DC, USAHortal, M, Minist Salud, Dept Maternoinfantil, Hidalgo 532-601, Montevideo 11300, Uruguay TI - Antibiotic resistance in Streptococcus pneumoniae in six Latin American countries: 1993-1999 surveillance AB - The impact of invasive pneumococcal invasive disease is increased by the emergence of antibiotic resistance. We report regional and temporal variations in antibiotic resistance for 4,105 invasive Streptococcus pneumoniae isolates collected from Latin American children <5 years, between 1993 and 1999. Reduced susceptibility to penicillin was detected in 1,182 isolates (28.8%); 36% of these were resistant (&GE;2 μg/ml), including 12.6% with MIC&GE;4 μg/ml, occurring primarily in serotypes 14 and 23F. Reduced susceptibility to third-generation cephalosporins was detected in 12.1% of the collection. Mexico had the highest proportion of reduced susceptibility to penicillin (51.6%) and to third-generation cephalosporins (22%), whereas Brazil had the lowest at 20.9% and 0.7%, respectively. Isolates cultured from patients with pneumonia were more likely to have reduced susceptibility to third-generation cephalosporins than isolates from patients with meningitis (p<0.0001). Susceptibility to trimethoprim-sulfamethoxazole, chloramphenicol, erythromycin, and vancomycin was tested by disk diffusion for 2.899 isolates. Reduced susceptibility was observed for 45.6%, 11.5%, 6.9%, and 0%, respectively. Thirty-one percent of the strains were resistant to greater than or equal to2 drugs. High levels of antibiotic resistance in Latin America emphasize the need for the development of and adherence to rational antibiotic use guidelines. On-going surveillance will monitor the impact of these programs MH - Argentina MH - Brazil MH - Canada MH - Chile MH - Colombia MH - Mexico|Morelos MH - Uruguay MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 13 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1076-6294 UR - ISI:000173401700010 L2 - BETA-LACTAM ANTIBIOTICS; ANTIMICROBIAL RESISTANCE; PNEUMOCOCCAL RESISTANCE; CAPSULAR TYPES; PENICILLIN-RESISTANCE; SYSTEMIC INFECTIONS; CHILDREN; PREVALENCE; CLONE; SUSCEPTIBILITY SO - Microbial Drug Resistance-Mechanisms Epidemiology and Disease 2001 ;7(4):391-401 3222 UI - 12525 AU - House JW AU - Toh EH AU - Perez A AD - House Ear Res Inst, Dept Clin Studies, Los Angeles, CA 90057, USAHouse Ear Clin, Los Angeles, CA, USAHosp Gen Zapopan, Dept Otolaryngol, Zapopan, MexicoHouse, JW, House Ear Res Inst, Dept Clin Studies, 2100 W 3rd St, Los Angeles, CA 90057 USA TI - Diving after stapedectomy: Clinical experience and recommendations AB - OBJECTIVES: Much controversy exists concerning the risk of inner ear barotrauma after stapes surgery in scuba and sky divers. Uniform consensus has not been established regarding poststapedectomy barorestrictions. The purpose of this study was (1) to determine the prevalence of adverse auditory and/or vestibular sequelae in patients after stapedectomy related to scuba and sky diving, and (2) to offer recommendations on barometric exposure after stapes surgery. STUDY DESIGN: Survey questionnaires were mailed to 2222 patients who had undergone stapedectomies at a single tertiary otologic referral center between 1987 and 1998. Two hundred eight of the initial 917 respondents (22.7%) had snorkeled, scuba, or sky dived after stapes surgery, and 140 of these responded to a second questionnaire detailing dive protocols, otologic symptoms, and their relationship to the diving activities. Of the 140, 28 had scuba or sky dived. Their survey data were analyzed and their medical records were reviewed. RESULTS: Four of the 22 scuba divers (18.1%) experienced otologic symptoms at the time of diving. These included otalgia on descent (3/22; 13.6%), tinnitus (1/22; 4.5%), and transient vertigo on initial submersion (1/22; 4.5%). One patient had sudden sensorineural hearing loss and vertigo develop 3 months after scuba diving, which he related to noise exposure. He was subsequently found to have a perilymph fistula, which was successfully repaired. Of the 9 patients who sky dived, 2 patients (22.2%) reported otologic symptoms during the dive. No significant diving-related long-term effects indicative of labyrinthine injury were seen in any of the 28 patients. CONCLUSIONS: Stapedectomy does not appear to increase the risk of inner ear barotrauma in scuba and sky divers. These activities may be pursued with relative safety after stapes surgery, provided adequate eustachian tube function has been established MH - USA MH - Mexico|Jalisco PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 7 U4 - Otorhinolaryngology;Surgery U5 - J;Article AV - English IS - 0194-5998 UR - ISI:000171683500012 L2 - INNER-EAR BAROTRAUMA; REVISION STAPES SURGERY; RUPTURE; DIVERS SO - Otolaryngology-Head and Neck Surgery 2001 ;125(4):356-360 3223 UI - 12807 AU - Howard RW AU - Perez-Lachaud G AU - Lachaud JP AD - USDA ARS, Manhattan, KS 66502, USAEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Toulouse 3, CNRS, Lab Ethol & Cognit Anim, FRE 2382, F-31062 Toulouse, FranceHoward, RW, USDA ARS, 1515 Coll Ave, Manhattan, KS 66502, USA TI - Cuticular hydrocarbons of Kapala sulcifacies (Hymenoptera : Eucharitidae) and its host, the ponerine ant Ectatomma ruidum (Hymenoptera : Formicidae) AB - Cuticular hydrocarbons from the ponerine ant Ectatomma ruidum, Roger and a highly integrated euchuritid myrmecophile, Kapala sulcifacies (Cameron), associated with it, have been characterized. Ninety hydrocarbons were identified from the ant, 55 hydrocarbons from the female wasp and 54 hydrocarbons from the male wasp. The wasps and ants share 40 hydrocarbons. These shared 40 hydrocarbons represent 92.6% of their hydrocarbon composition for female Kapala, 84.3% for male Kapala and 67.7% for the ants. The wasps have a carbon number range of C-27 to C-35; the ants have a range Of C-23 to C-35. Both species possess n-alkanes, C-27 to C-33 for the wasps, C-23 to C-34 for the ants. Both species also possess major quantities of Z-7- and Z-9 alkenes; C-29 to C-33 for the wasps; C-23 to C-35 for the ants. The female wasps possess a low amount of a conjugated C-31 diene (neither the ants nor the male wasps possess this hydrocarbon), and the ants, but not the wasps, contain low quantities of nonconjugated dienes (carbon numbers of C-23 to C-29) with double bonds at Delta (9), and Delta (14). Both wasps and ants share homologous series of 3-, 5-, 10-, 11-, 12-, 13-, 15- and 17-methyl branched alkanes. Ants and wasps also share a homologous series of 3,7-dimethylalkanes. Other intern-ally branched dimethyl alkanes are found in both ants and wasps, but only 11, 15-DiMeC(29), is shared. Wasps have 7,15- and 10,14-dimethyl alkanes while the ants have 15,19-dimethyl alkanes. Kapala sulcifacies and E. ruidum both possess hydrocarbons of the 5, X-, 11, X-, 12, X- and 13, X-DiMe series, but the compounds involved are not shared because they represent different compounds, Behavioral observations indicate that the ants accept the newly emerged adult parasitoids with no evidence of agonistic behavior for a period of time after adult eclosion. Nevertheless, the chemical deception is not completely efficient because young adult Kapala are soon ejected from the nest by transportation by their host. These transportations frequently occur after seizure at the base of the wasps' characteristic scutellar spines, such structures allowing for easy transportation without injury for the parasite. Moreover, if no method of escaping the colony is provided, the ants ultimately attack the parasitoids. The substantial chemical overlap of the cuticular hydrocarbon profiles of the ants and wasps are discussed in the context of the social life of the colony MH - France MH - Mexico|Chiapas MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000171207900011 L2 - Kapala sulcifacies;Ectatomma ruidum;species recognition;parasite;mass spectrometry;semiochemicals;CHEMICAL MIMICRY; NESTMATE RECOGNITION; OBLIGATE PREDATOR; BEHAVIOR; RHINOTERMITIDAE; CAMOUFLAGE; PROFILES; ISOPTERA; WORKERS; ECOLOGY SO - Annals of the Entomological Society of America 2001 ;94(5):707-716 3224 UI - 13572 AU - Hsu WK AU - Zhu YQ AU - Firth S AU - Terrones M AU - Terrones H AU - Trasobares S AU - Clark RJH AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandUniv London Univ Coll, Christopher Ingold Labs, London WC1H 0AJ, EnglandUNAM, Inst Fis, Queretaro 76000, MexicoUniv Paris Sud, Phys Solides Lab, F-91405 Orsay, FranceHsu, WK, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - WxMoyCzS2 nanotubes MH - United Kingdom MH - France MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Letter AV - English IS - 0008-6223 UR - ISI:000168995400017 L2 - carbon nanotubes;CARBON SO - Carbon 2001 ;39(7):1107-1111 3225 UI - 13056 AU - Hubacher D AU - Lara-Ricalde R AU - Taylor DJ AU - Guerra-Infante F AU - Guzman-Rodriguez R AD - Family Hlth Int, Res Triangle Pk, NC 27709, USANatl Perinatol Inst, Mexico City, DF, MexicoHubacher, D, Family Hlth Int, POB 13950, Res Triangle Pk, NC 27709, USA TI - Use of copper intrauterine devices and the risk of tubal infertility among nulligravid women AB - Background: Previous studies of intrauterine devices (IUDs), many of which are no longer in use, suggested that they might cause tubal infertility. The concern that IUDs that contain copper - currently the most commonly used type - may increase the risk of infertility in nulligravid women has limited the use of this highly effective method of birth control. Methods: We conducted a case-control study of 1895 women recruited between 1997 and 1999. We enrolled 358 women with primary infertility who had tubal occlusion documented by hysterosalpingography, as well as 953 women with primary infertility who did not have tubal occlusion (infertile controls) and 584 primigravid women (pregnant controls). We collected information on the women's past use of contraceptives, including copper IUDs, previous sexual relationships, and history of genital tract infections. Each woman's blood was tested for antibodies to Chlamydia trachomatis. We used stratified analyses and logistic regression to assess the association between the previous use of a copper IUD and tubal occlusion. Results: In analyses involving the women with tubal occlusion and the infertile controls, the odds ratio for tubal occlusion associated with the previous use of a copper IUD was 1.0 (95 percent confidence interval, 0.6 to 1.7). When the primigravid women served as the controls, the corresponding odds ratio was 0.9 (95 percent confidence interval, 0.5 to 1.6). Tubal infertility was not associated with the duration of IUD use, the reason for the removal of the IUD, or the presence or absence of gynecologic problems related to its use. The presence of antibodies to chlamydia was associated with infertility. Conclusions: The previous use of a copper IUD is not associated with an increased risk of tubal occlusion among nulligravid women, whereas infection with C. trachomatis is MH - Mexico|Distrito Federal MH - USA PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 52 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0028-4793 UR - ISI:000170562900002 L2 - PELVIC INFLAMMATORY DISEASE; CHLAMYDIA-TRACHOMATIS; HYSTEROSALPINGOGRAPHY; FERTILITY; STERILIZATION; INFECTIONS; TESTS SO - New England Journal of Medicine 2001 ;345(8):561-567 3226 UI - 13703 AU - Huerta A AU - Calderon HA AU - Umemoto M AD - Inst Politecn Nacl, Mexico City 07300, DF, MexicoToyohashi Univ Technol, Toyohashi, Aichi 4418580, JapanHuerta, A, Inst Politecn Nacl, UPALM Ed 9, Mexico City 07300, DF, Mexico TI - Production and sintering of MgO-MgFe2O4 powder ceramics by mechanical alloying AB - Ceramic materials consisting of magnetic particles (MgFe2O4) in an insulating matrix (MgO) with a nanocrystalline structure have been produced by mechanical alloying and sintering techniques. Initial mixtures of MgO and Fe2O3 were milled in high-energy mills and characterized after different milling times. Increasing amounts of magnesiowustite (MgxFe1-xO) form as a function of milling time. Sintering was performed from 673 to 1273 K in vacuum. Sintering at low temperatures allows retention of nanosized grains containing a fine dispersion of magnetic particles in a magnesiowustite matrix. Measurement of magnetic properties is used to determine both the nature of the developed phases and the grain sizes MH - Japan MH - Mexico|Distrito Federal PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000168667500100 L2 - ceramic;magnetic properties;mechanochemical reaction;sintering SO - Metastable, Mechanically Alloyed and Nanocrystalline Materials, Ismanam-2000 2001 ;360-3():631-636 3227 UI - 14098 AU - Huerta G AU - Jiang WX AU - Tanner MA AD - Ctr Invest Matemat, Dept Probabil & Stat, Guanajuato 36000, MexicoNorthwestern Univ, Dept Stat, Evanston, IL 60208, USAHuerta, G, Ctr Invest Matemat, Dept Probabil & Stat, Apartado Postal 402, Guanajuato 36000, Mexico TI - Untitled - Discussion MH - Mexico|Guanajuato MH - USA PB - ALEXANDRIA: AMER STATISTICAL ASSOC RP - NOT IN FILE U3 - TC 6 U4 - Statistics & Probability U5 - J;Editorial Material AV - English IS - 1061-8600 UR - ISI:000167510900006 L2 - CONDITIONAL HETEROSKEDASTICITY SO - Journal of Computational and Graphical Statistics 2001 ;10(1):82-89 3228 UI - 13496 AU - Huerta R AU - Wudka J AD - Univ Merida, Cinvestav IPN, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoUniv Calif Riverside, Dept Phys, Riverside, CA 92521, USAHuerta, R, Univ Merida, Cinvestav IPN, Dept Fis Aplicada, Merida 97310, Yucatan, Mexico TI - Effective theory of systems coupled strongly to rapidly varying external sources AB - We consider quantum systems that interact strongly with a rapidly varying environment and derive a Schrodinger-like equation that describes the time evolution of the average wave function. We show that the corresponding Hamiltonian can be taken to be Hermitian provided all states are rotated using an appropriate-unitary transformation. The formalism is applied to a variety of systems and is compared and contrasted with related results describing stochastic resonances MH - Mexico|Yucatan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000169134800008 L2 - STOCHASTIC RESONANCE; CLIMATIC-CHANGE; LOCALIZATION SO - Physical Review A 2001 ;6306(6): 3229 UI - 12692 AU - Hunt LA AU - White JW AU - Hoogenboom G AD - Univ Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, CanadaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Georgia, Dept Biol & Agr Engn, Griffin, GA 30223, USAHunt, LA, Univ Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, Canada TI - Agronomic data: advances in documentation and protocols for exchange and use AB - Data from agronomy experiments are typically collected and stored in a number of minimally documented computer files, with additional information being entered and archived in field books or diaries. Data manipulation is generally cumbersome and error-prone, and data loss is frequent. Modern database technology has the potential to resolve these issues. However, experience gained by an international network of experimenters and crop modellers (the International Benchmark Sites Network for Agrotechnology Transfer; IBSNAT) in using a database for agronomic experiments conducted by many workers at different sites highlighted problems of data entry, quality control, and changing requirements for storage and output variables. In an attempt to minimize these problems, IBSNAT reduced its focus on a central database, but considerably enhanced its effort on the design and use of a set of simple, standard experiment documentation and results files that could be established and edited easily, transferred directly among workers, used as inputs to analytical software and crop models, and read by database and spreadsheet software. The standard files which were developed, and which were used in a software package termed DSSAT V3, have recently been upgraded by a consortium of experimenters and modellers (the International Consortium for Agricultural Systems Applications ICASA), These new files are described briefly here. The ICASA files constitute an advance in the potential for good documentation and storage of agronomic data, but only partly solve the problem of overall data management and use. There is still need for central and local databases that facilitate both the searching of information from different experiments, and the examination of relationships that may be apparent in a large array of data. A number of such databases have been developed for specific applications, and a few of these are briefly touched upon. In particular, recent work with one large database currently being developed by a number of international Agricultural Research Centers, National Research Organizations, and Universities, (the International Crop Information System, [CIS), is briefly described. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 23 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0308-521X UR - ISI:000171573700007 L2 - agronomy;data;file standards;IBSNAT;ICASA;documentation;minimum data set;databases;ICTS;AGROECOLOGICAL RESEARCH DATA; SIMULATION-MODELS; WHEAT; SYSTEM; YIELDS SO - Agricultural Systems 2001 ;70(2-3):477-492 3230 UI - 12790 AU - Hutton W AU - DeMets C AU - Sanchez O AU - Suarez G AU - Stock J AD - UNAM, Inst Geofis, Mexico City, DF, MexicoUniv Wisconsin, Dept Geol & Geophys, Madison, WI 53706, USACALTECH, Seismol Lab, Pasadena, CA 91125, USAHutton, W, UNAM, Inst Geofis, Mexico City, DF, Mexico TI - Slip kinematics and dynamics during and after the 1995 October 9 M-w=8.0 Colima-Jalisco earthquake, Mexico, from GPS geodetic constraints AB - We use horizontal and vertical crustal displacements derived from GPS measurements at 26 sites in western Mexico to study the coseismic and post-seismic kinematics and dynamics of the 1995 October 9 (M-w = 8.0) Colima-Jalisco earthquake along the Middle America Trench. The measurements bracket the entire landward edge of the approximately 150 km long rupture zone and span a 4 yr period for most sites. We solve for the temporal evolution of slip along the subduction interface by inverting GPS displacements for the coseismic and four post-seismic intervals (March 1995-March 1999), subject to the assumption that the crust responds elastically to slip along a shallow-dipping, curved subduction interface. Coseismic rupture of up to 5 m was largely focused above depths of 20 km and was limited to a 120-140 km long segment of the subduction zone. Within one week of the earthquake, post-seismic slip migrated downdip to depths of 16-35 km, where it has since decayed logarithmically. We also find evidence for shallow aseismic slip during 1996 or early 1997 northwest of the coseismic rupture zone and increasingly widespread relocking of shallow regions of the subduction interface after early 1997. The relative lack of afterslip in shallow regions of the subduction interface suggests that the interface lies in the unstable frictional regime and hence is strongly coupled between earthquakes. By 1999, the cumulative slip moment associated with post-seismic slip equaled similar to 70 per cent of the coseismic moment, with nearly all of this slip occurring downdip from the coseismic rupture zone. The migration of slip after the earthquake to a deeper and presumably velocity-strengthening area of the subduction interface and the logarithmic decay of afterslip conform to the qualitative and quantitative predictions of a model in which the fault kinematics are prescribed by rate- and state-variable frictional. laws. However, misfits to the geodetic displacements exceed the average displacement uncertainties for all epochs, implying one or more of the following. (1) the elastic response is heterogeneous due to slip along unmodelled upper crustal faults or variations in the elastic properties of the crust; (2) other post-seismic mechanisms such as viscoelastic or poroelastic effects contribute to or possibly dominate the post-seismic response; (3) we have underestimated the uncertainties in the GPS displacements MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000171126800006 L2 - crustal deformation;earthquakes;fault slip;geodesy;subduction;tectonics;SUBDUCTED RIVERA; SOUTHERN MEXICO; WESTERN MEXICO; VOLCANIC BELT; FRICTION LAWS; COCOS PLATES; DEFORMATION; FAULT; CALIFORNIA; DEPTH SO - Geophysical Journal International 2001 ;146(3):637-658 3231 UI - 11994 AU - ias-Garcia C AU - Valero A AD - Univ E Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, EnglandUNAM, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoMacias-Garcia, C, Univ E Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, England TI - Context-dependent sexual mimicry in the viviparous fish Girardinichthys multiradiatus AB - Male Girardinichthys multiradiatus display a black spot around the vent that resembles the "pregnancy" spot of females belonging to the families Poeciliidae and Goodeidae. This spot is usually very pale/absent in dominant males, and becomes apparent upon losing an agonistic encounter. Males which exhibited the spot when in isolation (when they were socially dominant) were more likely to lose fights than males without this colour pattern when isolated. Subordinate males with experimentally enhanced spots (E) were as likely to engage in fights with the other males as males with concealed spots (C). However, of all the agonistic interactions involving an experimental male (C or E) and either the dominant or the other experimental male (E or C) a significantly larger proportion was initiated by the E than by the C male, implying that, compared to C males, fish with enhanced black spots were less often perceived as rivals by the other males. With manipulation of the patch courtship displays to subordinate males by the dominant male increased significantly more for E than for the C males. We argue that by displaying the black spot, males with low resource-holding power increase their probability of being regarded as females by other fish, and may thus gain access to defended females and courtship arenas MH - United Kingdom MH - Mexico|Distrito Federal PB - FLORENCE: UNIVERSITA DEGLI STUDI DI FIRENZE RP - NOT IN FILE U3 - TC 2 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0394-9370 UR - ISI:000173254800002 L2 - sexual mimicry;viviparous fish;social dominance;resource-holding power;Goodeidae;pregnancy spot;FEMALE-MIMICRY; REPRODUCTIVE STRATEGY; BLUEGILL SUNFISH SO - Ethology Ecology & Evolution 2001 ;13(4):331-339 3232 UI - 13064 AU - ias-Samano JE AU - Borden JH AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoBorden, JH, Simon Fraser Univ, Dept Biol Sci, Ctr Environm Biol, Burnaby, BC V5A 1S6, Canada TI - Semiochemical interactions between Scolytus ventralis LeConte and Pityokteines elegans (Swaine) (Coleoptera : Scolytidae) AB - Two experiments evaluated the effect of baiting uninfested grand fir logs and trees undergoing initial attack by Scolytus ventralis LeConte with Pityokteines elegans (Swaine) pheromone, on the subsequent attack by both species. Two more experiments assessed the effect of synthetic bark oil, exo-brevicomin, and P. elegans pheromone on the response by each species to multiple-funnel traps baited with attractants for the other species. The pheromone of P. elegans on unattacked logs did not have an inhibitory effect on the attack by S. ventralis. However, trees attacked by S. ventralis that were baited with P. elegans pheromone just after attack, yielded significantly fewer S. ventralis progeny than the unbaited controls. Neither synthetic bark oil nor exo-brevicomin caused a significant change in the catch of P. elegans in traps baited with its pheromone, but the predator Thanasimus undatulus Say was caught in traps baited with (+/-)-ipsenol, (+/-)-ipsdienol and synthetic bark oil, and another predator, Enoclerus sphegeus F., was caught in traps baited with exo-brevicomin alone or in combination with ipsenol and ipsdienol. The results do not support the hypothesis that interference competition based on semiochemical communication occurs between the two species MH - Canada MH - Mexico|Chiapas PB - TIFTON: GEORGIA ENTOMOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0749-8004 UR - ISI:000170501600004 L2 - semiochemicals;Scolytus ventralis;Pityokteines elegans;Thanasimus undatulus;Enoclerus sphegeus;Abies grandis;ipsenol;ipsdienol;exo-brevicomin;bark oil;DRYOCOETES-AFFABER COLEOPTERA; DENDROCTONUS-RUFIPENNIS; LODGEPOLE PINE; FIR ENGRAVER; IPS-TRIDENS; ATTRACTION; PHEROMONES; DYNAMICS; BEETLE SO - Journal of Entomological Science 2001 ;36(3):251-258 3233 UI - 12546 AU - Ibarguengoytia PH AU - Sucar LE AU - Vadera S AD - Inst Invest Elect, Temixco 62490, Morelos, MexicoITESM, Temixco 62490, Morelos, MexicoUniv Salford, Sch Sci, Salford M5 4WT, Lancs, EnglandIbarguengoytia, PH, Inst Invest Elect, Av Reforma 113, Temixco 62490, Morelos, Mexico TI - Real time intelligent sensor validation AB - The validation of data from sensors has become an important issue in the operation and control of modern power plants. One approach is to use knowledge based techniques to detect inconsistencies in measured data. These techniques involve two challenges: real time performance and the use of reasoning methods under uncertainty. This article presents an algorithm for intelligent sensor validation in real time environments. The algorithm utilizes a Bayesian network for the detection of a fault in a set of sensors. This Bayesian network represents the dependencies and independencies among all the sensors. A second Bayesian network isolates the faulty sensor among all the apparent faulty sensors. This isolation is made incrementally, i.e., a probability of failure vector is provided at any time and the quality of the belief measurements increases when more time is spent in the computation. This characteristic makes the algorithm suitable for use in real time environments. An empirical evaluation is presented in the validation of temperature sensors of a gas turbine in a combined cycle plant in Mexico MH - United Kingdom MH - Mexico|Morelos PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000171787000027 L2 - artificial intelligence;power generation protection;real time systems;sensors;uncertainty;PROBABILISTIC CAUSAL MODEL SO - Ieee Transactions on Power Systems 2001 ;16(4):770-775 3234 UI - 13581 AU - Ibarra-Nunez G AU - Garcia JA AU - Lopez JA AU - Lachaud JP AD - Univ Toulouse 3, Lab Ethol & Cognit Anim, CNRS, FRE 2041, F-31062 Toulouse, FranceColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoLachaud, JP, Univ Toulouse 3, Lab Ethol & Cognit Anim, CNRS, FRE 2041, 118 Route Narbonne, F-31062 Toulouse, France TI - Prey analysis in the diet of some ponerine ants (Hymenoptera : Formicidae) and web-building spiders (Araneae) in coffee plantations in Chiapas, Mexico AB - A census of the prey captured by seven common web-building spiders (Cyclosacaroli, Gasteracantha cancriformis, Leucauge mariana, L. venusta, Anelosimus jucundus, Achaearanea tesselata, and an undetermined species of Linyphiidae) and two dominant ponerine ant species (Ectatomma ruidum and E. tuberculatum) was carried out over a two-year period in different coffee plantations, in the Mexican state of Chiapas. A total of 4,334 prey items were recovered, of which near to 70% were identified to family level and classified according to their feeding habits. For each of the predators, the bulk of the prey belonged to the four most abundant orders of insects (Hymenoptera, Diptera, Homoptera and Coleoptera) known to be associated with Neotropical coffee plantations. The comparison by computed coefficients of both diet breath and diet overlap indicated some degree of similarity between the two ant species, and between the six spider species. Moreover, spiders that used webs that function in a similar manner as insect traps (both araneids and the tetragnathid on one side, both theridiids and the linyphiid on the other side) showed more similar diets. Each predator appeared to have an unique feeding niche within the coffee agroecosystem for all of the 28 comparisons made between pairs of species, diet overlap (C) values were far lower than the theoretical Value of +1 corresponding to complete overlap. Each species also differed in its response to prey availability although the frequency of predation on most types of prey appeared to be positively correlated with their relative abundance in the biotope. This correlation was especially obvious within the Hymenoptera. Of the 159 families identified, 30 (38.1% of all the identified prey) were recognized as containing species known to be pests of coffee plants. Herbivores, detritivores and polyphagous arthropods constituted the major part of prey for ants and spiders alike (82.9% of all identified prey for the web-building spiders against 89.9% for the ponerine ants), while only 11.9% of all identified prey corresponded to families that are beneficial (from an agricultural view point) as predators, parasitoids, or possible pollinators. These results, along with the absence of serious native coffee pests in the study area, confirm the beneficial economic impact of web-building spiders and carnivorous ants as generalist predators in Neotropical coffee agroecosystem MH - France MH - Mexico|Chiapas PB - CHICO: CALIF STATE UNIV RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0361-6525 UR - ISI:000168925800021 L2 - ant-spider communities;generalist predators;feeding ecology;diet overlap;coffee agroecosystem;STATES FIELD CROPS; TROPICAL AGROECOSYSTEM; ECTATOMMA-RUIDUM; NICHE BREADTH; TEXAS COTTON; RECRUITMENT; ARANEIDAE; BEHAVIOR; OVERLAP; GROWTH SO - Sociobiology 2001 ;37(3B):723-755 3235 UI - 12947 AU - Ibarra-Velarde F AU - Vera-Montenegro Y AU - Najera-Fuentes R AU - Sanchez-Albarran A AD - UNAM, Fac Med Vet & Zoot, Dept Parasitol, Mexico City 04510, DF, MexicoMSD AGVET Tech Serv, Rahway, NJ, USASAGAR, INIFAP, CENID Parasitol, Cuernavaca 62500, Morelos, MexicoIbarra-Velarde, F, UNAM, Fac Med Vet & Zoot, Dept Parasitol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Efficacy of combined chemotherapy against gastrointestinal nematodes and Fasciola hepatica in cattle AB - A controlled trial of the efficacy of several anthelmintic compounds as a combined therapy in the treatment of gastrointestinal nematodes (GIN) and Fasciola hepatica (F hepatica) in naturally infected cattle was carried out. Twenty crossbred calves, 8-18 months old, were selected for inclusion in the trial based on finding eggs of F. hepatica and GIN in the faeces. They were blocked in four groups of five animals each according to GIN fecal egg counts on day 0. Treatments were sequentially allocated to animals in each block as follows: Group 1 served as non-treated control; Group 2 was treated with netobimin orally at 20 mg/kg; Group 3 received triclabendazole orally at 12 mg/kg and levamisole was applied intramuscularly at 5.5 mg/kg; Group 4 received clorsulon administered subcutaneously (s.c.) at 2 mg/kg and ivermectin s.c. at 200 mug/kg. Six to eight days after treatment the animals were euthanatized in order to collect and identify the parasites. Results showed a reduction of GIN by 87.3, 95.8 and 99.5% in Groups 2, 3 and 4, respectively. The percentage reduction of immature flukes was 0.0, 72.5, and 67.5% and for adult flukes 91.0, 97.5 and 100% for Groups 2, 3 and 4, respectively, Compounds indicated against nematodes showed high efficacy and products directed against F hepatica acceptably removed adult flukes. However, efficacy against immature stages was generally not satisfactory. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000170697900003 L2 - gastrointestinal nematodes;Fasciola hepatica;chemotherapy;cattle;Mexico;OSTERTAGIA-OSTERTAGI; CLORSULON; LEVAMISOLE; ANTHELMINTICS; FENBENDAZOLE; ALBENDAZOLE; INFECTIONS; MATURE; LARVAE SO - Veterinary Parasitology 2001 ;99(3):199-204 3236 UI - 13284 AU - Ibarra C AU - Nedvetsky PI AU - Gerlach M AU - Riederer P AU - Schmidt HHHW AD - Univ Giessen, Rudolf Buchheim Inst Pharmakol, D-35392 Giessen, GermanyUniv Wurzburg, Clin Neurochem, Dept Psychiat & Psychotherapy, D-97080 Wurzburg, GermanyUniv Queretaro, Fac Chem, Ctr Univ, Queretaro, MexicoIbarra, C, Univ Giessen, Rudolf Buchheim Inst Pharmakol, Frankfurter Str 107, D-35392 Giessen, Germany TI - Regional and age-dependent expression of the nitric oxide receptor, soluble guanylyl cyclase, in the human brain AB - Nitric oxide (NO), synthesized by neuronal NO synthase (NOS-I), plays essential physiological roles in the brain. The major molecular target for NO is soluble guanylyl cyclase (sGC), a heterodimeric hemoprotein composed of a larger alpha and a smaller beta subunit. Both subunits of sGC are needed to generate the second messenger cyclic GMP (cGMP). Here we show using subunit-specific antibodies and Western blot analysis that sGC alpha (1) and sGCP(1) protein subunits are present in all examined human brain regions. The relative distribution of the two subunits was similar and also correlated well with the known distribution of NOS-I. The highest expression levels of sGC were found in cortex. basal ganglia and the limbic system. These regions display the most prominent biochemical and histological changes during ageing. In cortex, a negative correlation between the amounts of sGC and age was found, while sex and post-mortem delay time did not affect sGC levels significantly. Our data suggest that sGC alpha (1) and sGC beta (1) subunits are widely distributed in human brain, consistent with a major role in NO signaling. Moreover, the NO/cGMP pathway appears to be affected by ageing in the human brain. (C) 2001 Published by Elsevier Science B.V MH - Germany MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000169873900006 L2 - soluble guanylyl cyclase;human brain;ageing;cGMP;RAT-BRAIN; SIGNAL-TRANSDUCTION; ACTIVITY REQUIRES; ENZYME SUBUNITS; CYCLIC-GMP; SYNTHASE; HYBRIDIZATION; LOCALIZATION; ORGANIZATION; CEREBELLUM SO - Brain Research 2001 ;907(1-2):54-60 3237 UI - 13819 AU - Ibarra C AU - Muller H AU - Schmidt HHHW AD - Univ Giessen, Rudolf Buchheim Inst Pharmakol, D-35392 Giessen, GermanyUniv Queretaro, Ctr Univ, Fac Chem, Queretaro, Mexico TI - NO down-regulates SGC expression in endothelial cells in a cGMP-independent manner MH - Germany MH - Mexico|Queretaro PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0028-1298 UR - ISI:000167682100175 SO - Naunyn-Schmiedebergs Archives of Pharmacology 2001 ;363(4):R44-R44 3238 UI - 14532 AU - Ibarra L AU - Flores J AU - az-Perez JC AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Georgia, Coastal Plain Expt Stn, Dept Hort, Tifton, GA 31793, USADiaz-Perez, JC, Univ Georgia, Coastal Plain Expt Stn, Dept Hort, POB 748, Tifton, GA 31793 USA TI - Growth and yield of muskmelon in response to plastic mulch and row covers AB - The objective of this study was to determine the effect of plastic mulch alone or in combination with row covers on plant biomass, growth analysis parameters, and yield of muskmelon plants (Cucumis melo L.). The design was a randomized complete block with four replications. The treatments were: (1) no mulch, no row cover (control); (2) black plastic mulch (BPM); (3) BPM plus row cover removed 10 days after seeding (das) (BPM+CE); (4) BPM plus row cover removed 20 das (BPM+CI); (5) BPM plus row cover removed 32 das (BPM+CL). Plants grown using soil mulch plus row cover presented higher values of plant biomass, specific leaf area (SLA), relative growth rate (RGR), and net assimilation rate (NAR) compared to control plants. Early and total yield were highest in plants grown under row covers. In non-covered plants, early and total yield were both higher in BPM plants relative to the control. Heat accumulation by the crop measured as soil degree-days showed a higher correlation with early and total yield compared to heat accumulation measured as air degree-days. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Horticulture U5 - J;Article AV - English IS - 0304-4238 UR - ISI:000166237700013 L2 - muskmelon (Cucumis melo L.);plastic mulch;row covers;SOIL; POLYETHYLENE; TEMPERATURE; CUCUMBER; TOMATO; AIR SO - Scientia Horticulturae 2001 ;87(1-2):139-145 3239 UI - 14096 AU - Ibort A AU - de Leon M AU - Lacomba EA AU - Marrero JC AU - de Diego DM AU - Pitanga P AD - Univ Carlos III Madrid, Dept Matemat, Madrid 28911, SpainCSIC, Inst Matemat & Fis Fundamental, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mejico 09340, DF, MexicoUniv La Laguna, Fac Matemat, Dept Matemat Fundamental, Tenerife, Canary Islands, SpainUniv Fed Rio de Janeiro, Inst Fis, Dept Fis Matemat, BR-21944 Rio De Janeiro, BrazilIbort, A, Univ Carlos III Madrid, Dept Matemat, Ave Univ 30, Madrid 28911, Spain TI - Geometric formulation of Carnot's theorem AB - A geometrical approach for one-sided constraints is given. The Riemannian metric is used in order to define convenient projectors which give the post-impulses in terms of the pre-impulses. A formulation of Carnot's theorem within this geometric framework is exhibited MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000167509900016 L2 - ONE-SIDED CONSTRAINTS; MECHANICAL SYSTEMS; NONHOLONOMIC SYSTEMS; DYNAMICS; SYMMETRY SO - Journal of Physics A-Mathematical and General 2001 ;34(8):1691-1712 3240 UI - 14368 AU - Idarraga G AU - Ramos J AU - Young RA AU - Denes F AU - Zuniga V AD - Univ Guadalajara, Dept Wood Cellulose & Paper, Guadalajara, Jalisco, MexicoUniv Wisconsin, Dept Forest Ecol & Management, Madison, WI 53705, USAUniv Wisconsin, Ctr Plasma Aided Mfg, Madison, WI 53705, USAIdarraga, G, Univ Guadalajara, Dept Wood Cellulose & Paper, APDO Postal 52-93, Guadalajara, Jalisco, Mexico TI - Biomechanical pulping of Agave sisalana AB - The effect of biological pretreatment of sisal with several white rot fungi on the energy consumption in refining and on the mechanical properties of the pulps was evaluated in this investigation. Improvements were realized in all the mechanical properties (22-66%) and a reduction in the energy consumption of >39% was realized for the treated pulps with the different fungi. The best strength improvement and energy reduction results overall were obtained with the white-rot fungus, Ceriporiopsis subvermispora. The incubation time was optimized for this fungus with the optimum mechanical properties obtained with a two week treatment time MH - Mexico|Jalisco MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 1 U4 - Forestry;Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0018-3830 UR - ISI:000166896600007 L2 - bast fibers;biotechnology;biomechanical pulping;energy consumption;mechanical pulping;nonwood plants;pulp properties;thermomechanical pulping;white rot fungi SO - Holzforschung 2001 ;55(1):42-46 3241 UI - 13891 AU - Iglesias-Silva GA AU - Hall KR AD - Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAInst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, MexicoHall, KR, Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USA TI - An equation for prediction and/or correlation of second virial coefficients AB - me present a simple expression that satisfies known limits for correlating and/or predicting the second virial coefficient. For prediction, we utilize a generalized function that can provide the second virial coefficient of nonpolar and polar substances, as well as for molecules with association and quantum effects. The expression does not require additional terms to encompass these effects MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000168159100021 L2 - TEMPERATURE-RANGE; LIQUID REGIONS; THERMODYNAMIC PROPERTIES; HOMOGENEOUS GAS; 12 MPA; 340 K; PRESSURES; DENSITY; STATE; LINE SO - Industrial & Engineering Chemistry Research 2001 ;40(8):1968-1974 3242 UI - 13002 AU - Iliev IT AU - Shapiro PR AD - Univ Texas, Dept Phys, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Texas, Dept Astron, Austin, TX 78712, USAIliev, IT, Univ Texas, Dept Phys, Austin, TX 78712, USA TI - The post-collapse equilibrium structure of cosmological haloes in a low-density universe AB - An analytical model is presented for the post-collapse equilibrium structure of virialized objects that condense out of a low-density cosmological background universe, either matter-dominated or flat with a cosmological constant. This generalizes the model we derived previously for an Einstein-de Sitter (EdS) universe. The model is based upon the assumption that cosmological haloes form from the collapse and virialization of 'top-hat' density perturbations, and are spherical, isotropic and isothermal. This leads to the prediction of a unique, non-singular, truncated isothermal sphere (TIS), a particular solution of the Lane-Emden equation (suitably modified when Lambda not equal 0). The size and virial temperature are unique functions of the mass and redshift of formation of the object for a given background universe. The central density is roughly proportional to the critical density of the universe at the epoch of collapse. This TIS model is in good agreement with observations of the internal structure of dark-matter-dominated haloes on scales ranging from dwarf galaxies to X-ray clusters. It also reproduces many of the average properties of haloes in simulations of the cold dark matter (CDM) model to good accuracy, suggesting that it is a useful analytical approximation for haloes that form from realistic initial conditions. Our TIS model matches the density profiles of haloes in CDM N-body simulations outside the innermost region, while avoiding the steep central cusp of the latter which is in apparent conflict with observations. The TIS model may also be relevant to non-standard CDM models, such as that for self-interacting dark matter, recently proposed to resolve this conflict MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 36 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000170568100006 L2 - galaxies : clusters : general;galaxies : formation;galaxies : haloes;galaxies : kinematics and dynamics;cosmology : theory;dark matter;COLD DARK-MATTER; CLUSTERS; MODELS; EVOLUTION; GALAXIES; PROFILE; INFALL SO - Monthly Notices of the Royal Astronomical Society 2001 ;325(2):468-482 3243 UI - 12491 AU - Ilinskii A AU - Prutskij T AU - Silva-Andrade F AU - Chavez F AU - Shadrin E AU - Khrustalkova L AD - BUAP, Inst Ciencias, Puebla 72000, MexicoInst Fis Tecn Ioffe, St Petersburg 194201, RussiaIlinskii, A, BUAP, Inst Ciencias, Apdo Postal 207, Puebla 72000, Mexico TI - Characterization of doped sillenites by electrooptic and spectral methods AB - The main result of this paper was the high accurate characterization of the investigated samples. We were able to measure the Maxwell relaxation time for doped (Al, Cr, Mn Ti Nd) and undoped sillenite crystals was determined. The obtained values are as large as 10(3) S. Also, the correlation between spectroscopic electrical and electrooptical properties of doped sillenite crystals was established MH - Mexico|Puebla MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900044 SO - Modern Physics Letters B 2001 ;15(17-19):749-751 3244 UI - 14252 AU - Ilinskii AV AU - Shadrin EB AD - Benemerita Univ Autonoma Puebla, Mexico City, DF, MexicoRussian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaIlinskii, AV, Benemerita Univ Autonoma Puebla, Mexico City, DF, Mexico TI - Measuring the parameters of photorefractive crystals by an electrooptical compensation method AB - A new compensation method, based on the longitudinal electrooptical effect in a modified Pockels cell accommodating two crystal plates instead of a single plate, is proposed for measuring the parameters of photorefractive crystals. The plates are oriented so that their surfaces are perpendicular to the optical axis and the long semiaxes of the electric-field-induced birefringence ellipsoids are rotated 90 degrees relative to one another around this axis. The proposed method was used to measure the Maxwell relaxation time in the Bi12SiO20:Al crystal (0.2% Al) as a function of the photoexcitation intensity I-ex in the green-blue spectral region (lambda = 5145 Angstrom). For I-ex = 10 mW/cm(2) , the Maxwell relaxation time decreases by 6 +/- 1 s as compared to the dark value (80 +/- 10 s). (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 1063-7850 UR - ISI:000167082400009 SO - Technical Physics Letters 2001 ;27(2):112-113 3245 UI - 13941 AU - Infante F AU - Mumford J AU - Baker P AU - Barrera J AU - Fowler S AD - ECOSUR, Chiapas, MexicoUniv London Imperial Coll Sci Technol & Med, Ascot, Berks, EnglandCABI Biosci, Ascot, Berks, EnglandLandcare Res, Auckland, New ZealandInfante, F, Carr Antiguo Aeropuerto Km 2-5,Apartado Postal 36, Tapachula 30700, Chiapas, Mexico TI - Interspecific competition between Cephalonomia stephanoderis and Prorops nasuta (Hym.,Bethylidae), parasitoids of the coffee berry borer, Hypothenemus hampei (Col., Scolytidae) AB - The competition between Cephalonomia stephanoderis and Prorops nasuta was studied in the laboratory, using coffee fruits infested with the host of these parasitoids, the coffee berry borer Hypothenemus hampei. Experiments were performed under different conditions, using: (a) three temperatures; (b) five densities of infested coffee fruits; and (c) introducing the parasitoids at different times. The effect of competition was determined according to the production of the progeny. When cultured together at the same time, C. stephanoderis produced in general, more progeny than P. nasuta under conditions of 29 degreesC and alternating temperatures of 18-29 degreesC. Nevertheless, there were significant differences at densities of 1.3. fruits : parasitoids (F-0.05 = 8.9: d.f = 1, 12: P < 0.05) and 1 : 5 (F-0.05 = 7.56; d.f = 1, 12; P < 0.05) at 29 degreesC. Under alternating temperatures, there were differences at the same ratios as above in favour of C. stephanoderis, 1 : 3 (F-0.05 = 20.08; d.f. = 1, 12; P < 0.05) and 1.5 (F-0.05 = 20.21; d.f. = 1, 12; P < 0.05). Prorops nasuta was clearly more successful in all densities at 18 degreesC. When C. stephanoderis is was introduced 10 days before P. nasuta, the progeny production was markedly higher in eight from 10 densities at temperatures of 29 degreesC and 18-29 degreesC. Despite being introduced 10 days later, P. nasuta showed better performance at 18 degreesC. When P. nasuta was introduced 10 days earlier than C. stephanoderis, there were significant differences in progeny production in favour of P. nasuta in 13 of 15 fruit densities under the three temperatures. Both parasitoids avoided ovipositing on previously parasitized hosts. Aggressive behaviour or interference was not observed when they were outside coffee fruits MH - United Kingdom MH - Mexico|Chiapas MH - New Zealand PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0931-2048 UR - ISI:000168078300010 L2 - BETREM HYMENOPTERA; BETHYLIDAE; BIOLOGY; CYCLE SO - Journal of Applied Entomology-Zeitschrift fur Angewandte Entomologie 2001 ;125(1-2):63-70 3246 UI - 13811 AU - Ingwersen P AU - Larsen B AU - Rousseau R AU - Russell J AD - KHBO, Dept Ind Sci & Technol, B-8400 Oostende, BelgiumUniv Instelling Antwerp, IBW, B-2610 Wilrijk, BelgiumRoyal Sch Lib & Informat Sci, Dept Informat Studies, DK-2300 Copenhagen, DenmarkRoyal Sch Lib & Informat Sci, Ctr Informetr Studies, DK-2300 Copenhagen, DenmarkUniv Nacl Autonoma Mexico, Ctr Univ Invest Bibliotecol, Mexico City 04510, DF, MexicoRousseau, R, KHBO, Dept Ind Sci & Technol, Zeedijk, B-8400 Oostende, Belgium TI - The publication-citation matrix and its derived quantities AB - We give an overview of the main data of a publication-citation matrix. We show how impact factors are defined, and, in particular, point out the difference between the synchronous and the diachronous impact factor. The advantages and disadvantages of using both as tools in research evaluation are discussed MH - Belgium MH - Denmark MH - Mexico|Distrito Federal PB - BEIJING: SCIENCE PRESS RP - NOT IN FILE U3 - TC 14 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 1001-6538 UR - ISI:000168402600023 L2 - research evaluation;publication-citation matrix;diachronous impact factor;synchronous impact factor;SCIENCE; IMPACT SO - Chinese Science Bulletin 2001 ;46(6):524-528 3247 UI - 14376 AU - Iniguez-Covarrubias G AU - az-Teres R AU - Sanjuan-Duenas R AU - nzaldo-Hernandez J AU - Rowell RM AD - Univ Guadalajara, Dept Madera Celulosa & Papel, Guadalajara 45020, Jalisco, MexicoUniv Panamer, Escuela Ing Ind, Zapopan, Jalisco, MexicoUSDA, Forest Serv, Forest Prod Lab, Madison, WI 53705, USAIniguez-Covarrubias, G, Univ Guadalajara, Dept Madera Celulosa & Papel, Km 15-5 Carretera Guadalajara Nogales,Postal 51-9, Guadalajara 45020, Jalisco, Mexico TI - Utilization of by-products from the tequila industry. Part 2: potential value of Agave tequilana Weber azul leaves AB - The leaves of the agave plant are left in the field after harvesting the heads for tequila production. Different types of agave leaves were isolated, classified, and their content in the total plant determined. The usable fractions were collected and their properties determined. Of the total wet weight of the agave plant, 54% corresponds to the agave head, 32% corresponds to materials which could be usable for sugar and fiber production which leaves 14% of the wet plant without apparent utility. The fractions with higher total reducing sugars (TRS) content were the fresh fraction of partially dry leaves stuck to the head and the leaf bases with a TRS content of 16.1% and 13.1%, respectively. The highest TRS concentration (16-28%) is in the agave head which is used for tequila production. The leaves are 90-120 cm long and 8-12 cm wide and contain fiber bundles that are 23-52 cm long and 0.6-13 mm wide. The ultimate fiber length is approximately 1.6 mm with an average width of 25 mum. There are several types of leaf fibers that can be utilized depending on what part of the plant they come from and what product is desired. Agave leaf fibers were pulped using a soda pulping process and the pulp was hand formed into test sheets. Test sheets made from pulped agave leaf fibers had a breaking length comparable to paper made from both pine and eucalyptus fibers, but the tear index and burst index were lower than the other two papers. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Jalisco MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000166841700001 L2 - agave plant;agave leaves;nonwood fiber pulp;tequila by-products;agave paper properties SO - Bioresource Technology 2001 ;77(2):101-108 3248 UI - 14473 AU - Iniguez-Covarrubias G AU - Lange SE AU - Rowell RM AD - Univ Guadalajara, Dept Madera Celulosa & Papel, Guadalajara 44430, Jalisco, MexicoUSDA, Forest Prod Lab, Forest Serv, Madison, WI 53705, USAIniguez-Covarrubias, G, Univ Guadalajara, Dept Madera Celulosa & Papel, Km 15-5 Carretera,Apt Postal 52-93,CP 45020, Guadalajara 44430, Jalisco, Mexico TI - Utilization of byproducts from the tequila industry: part 1: agave bagasse as a raw material for animal feeding and fiberboard production AB - Agave bagasse was successfully separated into fractions that were used in sheep feeding trials. Agave bagasse can be substituted for corn stubble in the sheep's diet which resulted in improved weight gain. Agave bagasse was also processed into long and short fiber fractions with a hammermill and fiberboards of medium and high specific gravities being produced. Medium specific gravity agave fiberboards had moisture and mechanical properties comparable to medium specific gravity fiberboards made using aspen fiber. All high specific gravity agave fiberboards made from short or long fibers were stronger in bending than the ANSI standard for hardboards. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Jalisco MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000166556500004 L2 - agave bagasse;fiberboards;tequila byproducts;water swelling;agave fiber;agave bagasse pith;WHEAT STRAW; SHEEP SO - Bioresource Technology 2001 ;77(1):25-32 3249 UI - 13324 AU - Inoue M AU - Fernando Q AD - Univ Sonora, CIPM, Hermosillo, Sonora, MexicoUniv Arizona, Dept Chem, Tucson, AZ 85721, USAFernando, Q, Univ Sonora, CIPM, Hermosillo, Sonora, Mexico TI - Effect of dissolved CO2 on Gran plots MH - Mexico|Sonora MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Education, Scientific Disciplines U5 - J;Article AV - English IS - 0021-9584 UR - ISI:000169828500034 L2 - BASE SO - Journal of Chemical Education 2001 ;78(8):1132-1135 3250 UI - 12299 AU - Inoue MB AU - Machi L AU - Munoz IC AU - Rojas-Rivas S AU - Inoue M AU - Fernando Q AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonora, CIPM, Sonora 83000, MexicoInoue, MB, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - Metal-ligand interactions in benzodioxotetraaza-macrocyclic metal chelates AB - Reactions of ethylenediaminetetraacetic (edta) dianhydride with o-phenylenediamine (od) and 9,10-diaminophenanthrene (phn) gave (edtaod)H-2 and (edtaphn)H-2, respectively, in which a chelating edta unit and an aromatic diamine unit are linked by two amide bonds. The complexation of these new 12-membered macrocycles with transition metal ions was studied by X-ray crystallography, potentiometric titrations, UV-Vis absorption spectroscopy and fluorescence spectroscopy. The absorption spectra are sensitively changed by metal complexation. The spectral changes are the most significant for the Cu2+ complexes, and are well correlated with the species distribution diagram. The X-ray study of the Cu2+ complex, [Cu(edtaod)](o), has shown that a square plane is formed around the central metal ion by an amide oxygen atom, a carboxylate oxygen atom and an amino nitrogen atom from a ligand molecule and a carboxylate oxygen atom from the adjacent chelate molecule. The amide nitrogen atoms in [Cu(edtaod)](o) are readily deprotonated and result in the formation of [Cu(edtaodH(-1))](-) and [Cu(edtaodH(-2))](2-) in neutral and basic media. The coordination of deprotonated amide nitrogen atoms to a Cu2+ ion leads to a strong metal-ligand interaction, which causes an intense charge-transfer band in [Cu(edtaodH(-1))](-), new UV absorption bands in [Cu(edtaodH(-2))](2-) and the effective quenching of emission in the Cu2+ complex of (edtaphn)H-2. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000172478900009 L2 - macrocyclic metal chelates;absorption spectra;luminescence spectra;potentiometric titrations;X-ray structures;X-RAY STRUCTURES; FLUORESCENCE EMISSION; COMPLEXES; SENSORS; ANIONS; COORDINATION; PROTONATION; COPPER(II); RECEPTORS; CONSTANTS SO - Inorganica Chimica Acta 2001 ;324(1-2):73-80 3251 UI - 13429 AU - Inoue MB AU - Inoue M AU - Sugich-Miranda R AU - Machi L AU - Velazquez EF AU - Fernando Q AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoInoue, MB, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - High steric constraints and molecular distortion in methyl-substituted amide-based paracyclophanes and the binuclear Cu2+ complexes: X-ray structures, NMR and absorption spectra AB - Chelating paracyclophanes that are sterically constrained to a great extent have been synthesized and characterized by X-ray crystallography and NMR spectroscopy: the macrocycles studied are 2,9,18,25-tetraoxo-4,7,20,23-tetrakis(carboxtnetgtk)-1,4,7,10, 17,20,23,26-octaaza[10.10]paracyclophane, abbreviated as (Lpd)H-4, and its 2,5-dimethyl-p-phenylene and tetramethyl-p-phenylene derivatives, abbreviated as (Ldmpd)H-4 and (Ltmpd)H-4, respectively. Steric interaction between tetramethylphenylene and amide groups in the tetramethyl derivative defines the conformation of the macrocyclic cavity, and causes unusual spectroscopic and chemical properties including the extreme line-broadening of H-1 NMR signals and the low basicity of amino nitrogen; such properties are not observed for the other macrocycles, in which steric interaction between phenylene and amide groups is less effective. The complexation of the highly strained ligand (Ltmpd)H-4 with Cu2+ ions has been studied by X-ray crystallography and solution electronic spectroscopy. The macrocycle forms a binuclear complex of [Cu-2(LH-4)](4-) type in which four amide nitrogen atoms are deprotonated and each metal ion is coordinated to two amide nitrogen atoms and two amino nitrogen atoms. In the binuclear chelate molecule, the severe contraction of the macrocyclic rings forces the phenylene groups distorted to a boat form, due to the steric effect of the tetramethyl substituents. As a result, the metal-ligand charge-transfer interaction in the binuclear complex differs from that in the mononuclear chelate of the same macrocycle. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000169279100022 L2 - crystal structures;copper complexes;macrocyclic complexes;binuclear complexes;CYCLOPHANES; RECOGNITION SO - Inorganica Chimica Acta 2001 ;317(1-2):181-189 3252 UI - 13430 AU - Inoue MB AU - Machi L AU - Inoue M AU - Fernando Q AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoInoue, MB, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - Structural and spectroscopic studies of a metacyclophane and its binuclear Cu2+ complex AB - In a new chelating metacyclophane, 2,9,18,25-tetraoxo-4,7,20,23-tetrakis(carboxymethyl)-1,4,7,10,17,20,23,2 6-octaaza[10.10]metacyclophane, the amino nitrogen atoms have a higher basicity than that of the corresponding paracyclophane, although the local electron densities on the donor atoms are identical in the two isomers. The molecular structure of a binuclear Cu2+ complex with the metacyclophane has been studied by X-ray crystal analysis: the coordination geometry around each metal ion is described by a compressed trigonal bipyramid. The solution electronic spectra of the Cu2+ complex change with pH as a result of the conversion of the coordination sites of the amide groups. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000169279100037 L2 - crystal structures;copper complexes;macrocyclic complexes;binuclear complexes;ZN2+ SO - Inorganica Chimica Acta 2001 ;317(1-2):320-323 3253 UI - 13004 AU - Insuasty B AU - Rodriguez R AU - Quiroga J AU - Abonia R AU - Martinez R AU - Toscano A AU - Angeles E AD - Univ Valle, Dept Quim, Grp Invest Compuestos Heterociclicos, Cali 25360, ColombiaUNAM, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Lab Quim Med, Mexico City, DF, MexicoInsuasty, B, Univ Valle, Dept Quim, Grp Invest Compuestos Heterociclicos, Cali 25360, Colombia TI - Synthesis of 1-benzyl-6-(4-chlorophenyl)-2-(4-R-phenyl)-4-(4-R-styryl)-2,3-dihydropyr azolo [3,4-b] [1,4] diazepines AB - The reaction of 4-amino-5-benzylamino-3-(4-chlorophenyl)-1H-pyrazole (1) with substituted diarylidenketones (2) constitutes a convenient synthetic route to the hitherto unknown 1-benzyl-6-(4-chlorophenyl)-2-(4-R-phenyl)-4-(4-R-styryl)-2,3-dihydropyr azolo-[3,4-b][1,4]diazepines (3). Structures of all products were consistent with their IR, H-1-NMR, C-13-NMR and MS spectral data. X-ray crystallography data confirm the assigned structures MH - Colombia MH - Mexico|Distrito Federal PB - BASEL: MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1420-3049 UR - ISI:000170553400009 L2 - diazepine derivatives;diarylidenketones SO - Molecules 2001 ;6(8):710-715 3254 UI - 12229 AU - Iori M AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - Kangling H AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Li Y AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao C AU - Mao Z AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko SV AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhaog W AU - Zheng S AU - Zukanovich-Funchal R AD - Univ Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyBall State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, Istanbul, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Ramat Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyIori, M, Univ Roma La Sapienza, Piazzale Aldo Moro 5, Rome, Italy TI - Measurement of the D-s(+/-) lifetime AB - We report a precise measurement of the D-s(+/-) meson lifetime. The data were taken by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma (-), pi (-) and p beams. The measurement has been done using 918 reconstructed D-s(+/-). The lifetime of the D-s(+/-) s is measured to be 472.5 +/- 17.2 +/- 6.6 fs, using K*(892)K-0(+/-) and phi pi (+/-) decay modes. The lifetime ratio of D-s(+/-) to D-0 is 1.145 +/- 0.049. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172607200004 L2 - MESON SO - Physics Letters B 2001 ;523(1-2):22-28 3255 UI - 12482 AU - Iribarren A AU - Menendez-Proupin E AU - Caballero-Briones F AU - Castro-Rodriguez R AU - Pena JL AD - Univ La Habana, Inst Mat & React, Havana 10400, CubaCICATA IPN Altamira, Altamira 89600, Tamaulipas, MexicoIPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, Merida, Yucatan, MexicoIribarren, A, Univ La Habana, Inst Mat & React, San Lazaro & L Vedado Plaza, Havana 10400, Cuba TI - Composition mixture probabilistic model in the formation of semiconductor materials obtained by random growth techniques AB - During the obtaining of semiconductor materials by some growth techniques the film structure forms randomly according to how the species arrive to the subtract. If the film is a material with three or more elements they can organize in several compounds, which have only local order and even become amorphous. As a consequence the physico-chemical parameters manifest non-typical behaviors other than in pure materials. In the present work we develop a dynamical-probabilistic model, which describes quantitatively such composition mixture and was applied on the behavior of the absorption profiles of CdTeO films grown by radio frequency (rf) sputtering with different oxygen concentrations. The model can be applied to films obtained by other growth techniques MH - Cuba MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900018 L2 - THIN-FILMS SO - Modern Physics Letters B 2001 ;15(17-19):643-646 3256 UI - 13519 AU - Isac G AU - Kalashnikov VV AD - Royal Mil Coll Canada, Dept Math, Kingston, ON, CanadaCent Econ & Math Inst, Moscow, RussiaUniv Leon, Nuevo Leon, MexicoIsac, G, Royal Mil Coll Canada, Dept Math, Kingston, ON, Canada TI - Exceptional family of elements, Leray-Schauder alternative, pseudomonotone operators and complementarity AB - In this paper, the property of a function to be without exceptional family of elements (EFE) is investigated. We show that, for a pseudomonotone operator, the solvability of a complementarity problem is equivalent to the property of the function to be without EFE. Finally, we study the strict feasibility of a complementarity problem making use of the Leray-Schauder alternative and the notion of EFE MH - Canada MH - Mexico|Nuevo Leon MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 9 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 0022-3239 UR - ISI:000169264400004 L2 - exceptional family of elements;pseudomonotone operators;complementarity problems;existence of solutions;VARIATIONAL-INEQUALITIES; APPROXIMABLE MAPS; MONOTONE; THEOREM SO - Journal of Optimization Theory and Applications 2001 ;109(1):69-83 3257 UI - 14436 AU - Itoh M AU - Takahashi H AU - Fujii T AU - Takakura H AU - Hamakawa Y AU - Matsumoto Y AD - Ritsumeikan Univ, Fac Sci & Engn, Dept Photon, Shiga 5258577, JapanIPN, CINVESTAV, Dept Elect Engn, Mexico City, DF, MexicoTakakura, H, Ritsumeikan Univ, Fac Sci & Engn, Dept Photon, 1-1-1 Noji Higashi, Shiga 5258577, Japan TI - Evaluation of electric energy performance by democratic module PV system field test AB - A systematic investigation has been made on annual accumulated generated PV power from different solar arrays consisting of three kinds of silicon-based solar cells. To clarify seasonal output power variations with temperature in c-Si and a-Si cells might be an important issue for the operations of PV system. It has been shown from the results that electric output power from a-Si array in summer is 20% larger than that from c-Si. On the other hand, in winter, this scene should be reverted. However, output power from c-Si array is only 5% larger than that from a-Si. The analyzed data also shows that annual accumulated electric power generated from a-Si array corresponds to 90% of its nominal efficiency in the year. While in case of c-Si array, this ratio is about 84%. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000166462900055 L2 - democratic module field test;annual generated PV power;a-Si and c-Si-based PV array performances;temperature dependence of cell efficiency;seasonal changes of PV generation SO - Solar Energy Materials and Solar Cells 2001 ;67(1-4):435-440 3258 UI - 13260 AU - Ivlev BI AU - Kunchur MN AU - Rosales SJM AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoIvlev, BI, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USA TI - van Hove singularities and vortex motion in superconductors AB - When vortices move in a type-II superconductor under the action of an electric current, they interact with the crystal lattice generating acoustic waves. This results in a radiation-friction component to the vortex dissipation, which peaks at values of vortex velocity where there are phonons in the Brillouin zone of the crystal with matching phase and group velocities (the van Hove condition). Thus sharp peaks are expected in the current-voltage characteristic resulting from an enhancement of acoustic power generated by moving vortices MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000169835700085 L2 - T-C SUPERCONDUCTORS; MIXED-STATE; GENERATION; LATTICE; ATTENUATION; 2H-NBSE2; FIELDS; WAVES SO - Physical Review B 2001 ;6402(2): 3259 UI - 14349 AU - Izrailev FM AU - Krokhin AA AU - Ulloa SE AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAIzrailev, FM, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Mobility edge in aperiodic Kronig-Penney potentials with correlated disorder: Perturbative approach AB - It is shown that a nonperiodic Kronig-Penney model exhibits mobility edges if the positions of the scatterers are correlated at long distances. An analytical expression for the energy-dependent localization length is derived fur weak disorder in terms of the real-space correlators defining the structural disorder in these systems. We also present an algorithm to construct a nonperiodic but correlated sequence exhibiting desired mobility edges. This result could be used to construct window filters in electronic, acoustic, or photonic nonperiodic structures MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 37 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000166750600002 L2 - RANDOM-DIMER MODEL; ANDERSON LOCALIZATION; RANDOM SUPERLATTICES; ONE DIMENSION; STATES; SYSTEMS; ABSENCE; REALIZATION; CONDUCTANCE SO - Physical Review B 2001 ;63(4):art-041102 3260 UI - 12595 AU - Jackson AC AU - Ye HT AU - Ridaura-Sanz C AU - Lopez-Corella E AD - Queens Univ, Dept Med, Kingston, ON K7L 3N6, CanadaQueens Univ, Dept Microbiol & Immunol, Kingston, ON K7L 3N6, CanadaInst Nacl Pediat, Dept Pathol, Mexico City, DF, MexicoJackson, AC, Kingston Gen Hosp, Connell 725,76 Stuart St, Kingston, ON K7L 2V7, Canada TI - Quantitative study of the infection in brain neurons in human rabies AB - Rabies virus is a highly neuronotropic virus that causes encephalomyelitis. Rabies virus infection was studied in neurons in the brain of an 8-year-old girl that died of rabies in Mexico.The extent of the neuronal infection was evaluated quantitatively in neuronal cell types of the brain using histologic staining for Negri bodies and immunoperoxidase staining for rabies virus antigen in the same neurons. Quantitative image analysis was used to compare the amount of infection in five different neuronal cell types, which was expressed as a percentage of neuronal area. Purkinje cells and periaqueductal gray neurons showed the largest percentage area for both Negri bodies and signal for rabies virus antigen. In general, there was a good linear relationship between the area of Negri bodies and the area of signal for rabies virus antigen. Many neurons with rabies virus antigen did not have Negri bodies, however, and some neurons with large antigen signals, especially Purkinje cells and periaqueductal gray neurons, lacked Negri bodies. Formation of Negri bodies is likely influenced by factors that vary in different neuronal cell types. (C) 2001 Wiley-Liss, Inc MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Virology U5 - J;Article AV - English IS - 0146-6615 UR - ISI:000171633000028 L2 - immunohistochemistry;Negri bodies;pathogenesis;rabies SO - Journal of Medical Virology 2001 ;65(3):614-618 3261 UI - 13875 AU - Jackson AD AU - Mejia-Monasterio C AU - Rupp T AU - Saltzer M AU - Wilke T AD - Niels Bohr Inst, DK-2100 Copenhagen O, DenmarkUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoMax Planck Inst Kernphys, D-69029 Heidelberg, GermanyUniv Freiburg, D-79104 Freiburg, GermanyWilke, T, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark TI - Spectral ergodicity and normal modes in ensembles of sparse matrices AB - We investigate the properties of sparse-matrix ensembles with particular regard for the spectral ergodicity hypothesis, which claims the identity of ensemble and spectral averages of spectral correlators. An apparent violation of the spectral ergodicity is observed. This effect is studied with the aid of the normal modes of the random-matrix spectrum, which describe fluctuations of the eigenvalues around their average positions. This analysis reveals that spectral ergodicity is not broken, but that different energy scales of the spectra are examined by the two averaging techniques. Normal modes are shown to provide a useful complement to traditional spectral analysis with possible applications to a wide range of physical systems. (C) 2001 Elsevier Science B.V. All rights reserved MH - Denmark MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000168154500002 L2 - INVERSE PARTICIPATION RATIO; QCD DIRAC EIGENVALUES; DISORDERED-SYSTEMS; THOULESS ENERGY; FLUCTUATIONS; LOCALIZATION; FIELD SO - Nuclear Physics A 2001 ;687(3-4):405-434 3262 UI - 12943 AU - Jacobson LD AU - De Oliveira JAA AU - Barange M AU - Cisneros-Mata MA AU - Felix-Uraga R AU - Hunter JR AU - Kim JY AU - Matsuura Y AU - Niquen M AU - Porteiro C AU - Rothschild B AU - Sanchez RP AU - Serra R AU - Uriarte A AU - Wada T AD - Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, La Jolla, CA 92038, USAMarine & Coastal Management, ZA-8012 Rogge Bay, South AfricaPlymouth Marine Lab, GLOBEC Int Project Off, Plymouth PL1 3DH, Devon, EnglandCtr Reg Invest Pesqueras, Inst Nacl Pesca, Guaymas 85400, Sonora, MexicoInst Politecn Nacl, CICIMAR, La Paz 23096, BCS, MexicoNatl Fisheries Res & Dev Inst, W Fisheries Res Inst, Jung Gu 400201, Incheon, South KoreaUniv Sao Paulo, Inst Oceanog, BR-05508 Sao Paulo, BrazilInst Mar Peru, Esquina Gamarra & Gen Valle, Chucuito, Callao, PeruCtr Oceanog Vigo, Inst Espanol Oceanog, Vigo 36280, SpainUniv Massachusetts, Sch Marine Sci & Technol, New Bedford, MA 02744, USAInst Nacl Invest & Desarrollo Pesquero, RA-7600 Mar Del Plata, ArgentinaInst Fomento Pesquero, Valparaiso, ChileInst Tecnol Pesquero & Alimentario, San Sebastian 20008, SpainJapan Minist Agr Forestry & Fisheries, Natl Res Inst Fisheries Sci, Kanazawa Ku, Yokohama, Kanagawa 236, JapanJacobson, LD, Natl Marine Fisheries Serv, NE Fisheries Sci Ctr, 166 Water St, Woods Hole, MA 02543 USA TI - Surplus production, variability, and climate change in the great sardine and anchovy fisheries AB - We used fishery and survey data to calculate annual surplus production (ASP) and instantaneous surplus production rates (ISPR) for eight anchovy and nine sardine stocks. In addition, we calculated ASP per unit spawning area for six anchovy and six sardine stocks. Median ASP was highest for stocks with highest median biomass (mostly anchovies), and ASP was typically about 16% of stock biomass. ASP was often negative, more frequently for anchovies (36% of years) than for sardines (17% of years). ISPR was less variable for sardines and autocorrelated for longer-lived stocks (mostly sardines). Strong biomass increases tended to be preceded by short, abrupt increases in ISPR, and declines were pronounced when catches exceeded ASP for 5 years or more. The longest "runs" of positive and negative production were 21 and 4 years for sardine off Japan, 10 and 3 years for sardine off California, 8 and 2 years for anchovy off Peru, and 4 and 3 years for anchovy off California. ISPR is more sensitive to environmental changes than catch, biomass, or ASP and appear to be better for identifying environmentally induced regime shifts. Long time series show evidence of density-dependent effects on ASP in anchovies and sardines, but environmentally induced variation appears to dominate MH - Argentina MH - Brazil MH - Chile MH - United Kingdom MH - Japan MH - USA MH - Mexico|Baja California Sur MH - Mexico|Sonora MH - Peru MH - South Africa MH - South Korea MH - Spain PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 18 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0706-652X UR - ISI:000170811300019 L2 - PACIFIC SARDINE; NORTHERN ANCHOVY; SAGAX; CALIFORNIA; FLUCTUATIONS; ABUNDANCE; TRENDS; COAST SO - Canadian Journal of Fisheries and Aquatic Sciences 2001 ;58(9):1891-1903 3263 UI - 13061 AU - Jacome C AU - Florez M AU - Gurevich YG AU - Giraldo J AU - Gordillo G AD - Univ Nacl, Dept Fis, Bogota, ColombiaUniv Distrital Francisco Jose Caldas, Bogota, ColombiaCINVESTAV, Ctr Invest & Estud Avanzados, IPN, Mexico City 14000, DF, MexicoJacome, C, Univ Nacl, Dept Fis, Bogota, Colombia TI - Characterization of CdSxTe1-x thin films through thermoelectric power measurements AB - Polycrystalline CdSxTe1-x thin films deposited using a novel procedure based on the close spaced sublimation (CSS) method were characterized through thermoelectric power (alpha) measurements. The results revealed that these types of compounds present mixed conductivity and that their net conductivity becomes n-type for S concentrations greater than 50% (x > 0.5) and p-type when the S content is less than 50%. The results were interpreted with the help of theoretical calculations of alpha versus T, carried out using a model which includes scattering processes inside the grain and in the grain boundaries as well as dimensional effects. Comparing experimental values of alpha versus T with the theoretical calculation. it was found that the electrical transport in the CdSxTe1-x thin films is mainly affected by the interaction of electrons and holes with acoustic phonons and by scattering processes in the intergrain regions. The surface and bulk thermal conductivity also influence the electrical transport of the CdSxTe1-x films MH - Colombia MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000170424300018 L2 - SOLAR-CELLS SO - Journal of Physics D-Applied Physics 2001 ;34(12):1862-1867 3264 UI - 12275 AU - Jaime-Garcia R AU - Orum TV AU - Felix-Gastelum R AU - Trinidad-Correa R AU - VanEtten HD AU - Nelson MR AD - Univ Arizona, Dept Plant Pathol, Tucson, AZ 85721, USAUniv Occidente, Dept Biol, Unidad Los Mochis, Los Mochis 81223, Sinaloa, MexicoAlimentos Fuerte, Los Mochis 81200, Sinaloa, MexicoJaime-Garcia, R, Univ Arizona, Dept Plant Pathol, Tucson, AZ 85721, USA TI - Spatial analysis of Phytophthora infestans genotypes and late blight severity on tomato and potato in the Del Fuerte Valley using geostatistics and geographic information systems AB - Genetic structure of Phytophthora infestans, the causal agent of potato and tomato late blight, was analyzed spatially in a mixed potato and tomato production area in the Del Fuerte Valley, Sinaloa, Mexico. Isolates of P. infestans were characterized by mating type, allozyme analysis at the glucose-6-phosphate isomerase and peptidase loci, restriction fragment length polymorphism with probe RG57, metalaxyl sensitivity, and aggressiveness to tomato and potato. Spatial patterns of P. infestans genotypes were analyzed by geographical information systems and geostatistics during the seasons of 1994-95, 1995-96, and 1996-97. Spatial analysis of the genetic structure of P. infestans indicates that geographic substructuring of this pathogen occurs in this area. Maps displaying the probabilities of occurrence of mating types and genotypes of P. infestans, and of disease severity at a regional scale, were presented. Some genotypes that exhibited differences in epidemiologically important features such as metalaxyl sensitivity and aggressiveness to tomato and potato had a restricted spread and were localized in isolated areas. Analysis of late blight severity showed recurring patterns, such as the earliest onset of the disease in the area where both potato and tomato were growing, strengthening the hypothesis that infected potato tubers are the main source of primary inoculum. The information that geostatistical analysis provides might help improve management programs for late blight in the Del Fuerte Valley MH - Mexico|Sinaloa MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000172436100004 L2 - indicator kriging;PLANT-DISEASE EPIDEMIOLOGY; POPULATION-GENETICS; MANAGEMENT; VIRUS; SOIL; MIGRATIONS; PATTERNS; ECOLOGY; SPREAD SO - Phytopathology 2001 ;91(12):1156-1165 3265 UI - 12390 AU - Jaime A AU - Reyes M AU - Ruiz JA AU - Velez H AU - Mendez JM AU - Suarez M AD - Cent Quim Farmaceut, Ciudad Habana, CubaUNAM, Fac Quim, Dept Quim Organ, Mexico City, DF, MexicoUniv La Habana, Fac Quim, Lab Sintesis Organ, Cuidad Habana 10400, CubaRuiz, JA, Cent Quim Farmaceut, POB 16042,Ave 21&200, Ciudad Habana, Cuba TI - Bromination of steroidal 3-keto-4,6-diene AB - The bromination reaction on 3-keto-4,6-diene steroids, via an epoxide intermediate, with hydrobromic acid in acetic acid medium gives the corresponding 6-bromo derivative. On the other hand, bromination with molecular bromine and subsequent dehydrobromination in an aprotic solvent and basic media afforded the unexpected 4-bromo derivative. In this work we suggest an alternative mechanism for explaining the bromine transposition from C6 to C4 MH - Cuba MH - Mexico|Distrito Federal PB - NORTHWOOD: SCIENCE REVIEWS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0308-2342 UR - ISI:000172182200017 L2 - bromination;DERIVATIVES SO - Journal of Chemical Research-S 2001 ;(10):442-443 3266 UI - 13150 AU - Jansat S AU - Gomez M AU - Muller G AU - Dieguez M AU - Aghmiz A AU - Claver C AU - Masdeu-Bulto AM AU - Flores-Santos L AU - Martin E AU - Maestro MA AU - Mahia J AD - Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, SpainUniv Rovira & Virgili, Dept Quim Fis & Inorgan, E-43005 Tarragona, SpainUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Coruna, Edificio Anexo, Fac Ciencias, Serv Xerais Apoio Invest, E-15071 A Coruna, SpainGomez, M, Univ Barcelona, Dept Quim Inorgan, Marti I Franques 1-11, E-08028 Barcelona, Spain TI - Chiral S,S-donor ligands in palladium-catalysed allylic alkylation AB - Chiral dithioether ligands have been tested in the model Pd-catalysed allylic alkylation reaction of (+/-)-3-acetoxy-1,3-diphenyl-1-propene with dimethyl malonate. giving high enantioselectivity (up to 81% e.e.) for the first time in this type of system. Pd(Il)-allylic intermediates, [Pd(eta (3)-1,3-Ph-2-C3H3)(dithioether)]PF6 were prepared and characterised both in solution by NMR spectroscopy and solid state. The X-ray structure for [Pd(eta (3)-1,3-Ph-2-C3H3)(L)]PF6 (L=(R,R)-7,8-O-isopropylidene-1,5-dithiacyclononane) was determined. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 26 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000170127000013 L2 - ASYMMETRIC-SYNTHESIS; DITHIOETHER LIGANDS; IRIDIUM COMPLEXES; OXAZOLINE LIGANDS; HYDROGENATION; SUBSTITUTION; ALLYLATION; REACTIVITY; PRECURSORS; MECHANISM SO - Tetrahedron-Asymmetry 2001 ;12(10):1469-1474 3267 UI - 11879 AU - Jaque D AU - Romero JJ AU - Sanz-Garcia JA AU - De Carcer IA AU - Camarillo E AU - Jaque F AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainUNAM, Inst Fis, Mexico City, DF, MexicoJaque, F, Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain TI - Cr3+ ions location in codoped LiNbO3 : Sc2O3 crystals AB - This paper reports the optical spectroscopy (absorption and luminescence) and electron paramagnetic resonance (EPR) of codoped SC2O3 LiNbO3:Cr crystals (Sc3+ ions concentration was varied from 0 to 7%). Two kinds of Cr3+ ions: Cr-Li(3+) and C-Nb(3+) ccntres were observed with optical and magnetic characteristics very similar to that reported in MgO and ZnO codoped LiNbO3:Cr crystals. However in Sc2O3 codoped samples the Cr-Li(3+) centre is predominant in all the Sc2O3 concentration ranges examined. At variance with codoped MgO and ZnO, only a partial Cr3+ centre redistribution takes place for a Sc3+ ions content around 3%. This critical value is discussed considering a charge compensation model MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1042-0150 UR - ISI:000173331300038 L2 - LiNbO3;SC2O3;optical spectroscopy;EPR;DEFECT SO - Radiation Effects and Defects in Solids 2001 ;155(1-4):235-239 3268 UI - 14062 AU - Jasso CF AU - Valdez J AU - Perez JH AU - Laguna O AD - Univ Guadalajara, CUCEI, Div Ingn, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoCSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, SpainJasso, CF, Univ Guadalajara, CUCEI, Div Ingn, Dept Ingn Quim, Guadalajara 44430, Jalisco, Mexico TI - Analysis of butyl acrylate diffusion in a glassy polystyrene matrix to predict gradient structure AB - To be able to control composition structure in gradient polymers prepared by sequential polymerization, diffusion phenomena has to be considered, particularly for the first 100% weight increment in a glassy polymer matrix. With that purpose, an analytical model to predict diffusion in that region has been developed for amorphous polymers. The inclusion of a relaxation time to estimate surface concentration changes during sorption led to diffusion coefficients one order of magnitude higher than Fickian coefficients. However, adding a volume increment term to account for polymer swelling, diffusion coefficients went up to 48 rimes the Fickian values. Experimentally, butyl acrylate with a small amount of photosensitizer was diffused into a slightly crosslinked polystyrene slab matrix at different temperatures in the glassy region. After fixing the gradient composition by photopolymerization, chemical structures throughout the slab were determined by FTIR. The proposed model was confronted with experimental sorption showing a close fit at the different temperatures in the region of interest. (C) 2001 John Wiley & Sons, Inc MH - Mexico|Jalisco MH - Spain PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 9 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000167749900001 L2 - gradient;IPN;diffusion;swelling;model;POLYMERS SO - Journal of Applied Polymer Science 2001 ;80(9):1343-1348 3269 UI - 14311 AU - Jauregui-Renaud K AU - Gresty MA AU - Reynolds R AU - Bronstein AM AD - Natl Hosp Neurol & Neurosurg, Inst Neurol, Sect Neurootol, MRC Human Movement & Balance Unit, London WC1N 3BG, EnglandInst Mexicano Seguro Social, Unidad Invest Clin CMN La Raza, Mexico City, DF, MexicoGresty, MA, Natl Hosp Neurol & Neurosurg, Inst Neurol, Sect Neurootol, MRC Human Movement & Balance Unit, 8-11 Queen Sq Box 109, London WC1N 3BG, England TI - Respiratory responses of normal and vestibular defective human subjects to rotation in the yaw and pitch planes AB - We evaluated the contribution of the semicircular canals to autonomic responses to rotation in 12 normal subjects and three labyrinthine defective patients. Respiration, heart rate, arterial blood pressure and blood flow in the finger were recorded during 60 degrees /s steps of constant velocity rotation. Rotation was performed in the dark about a vertical axis: (I) with head upright for yaw stimulation of horizontal canals; (II) head tilted chin down and rotated laterally to stimulate the vertical canals in both face-forwards and backwards directions. In normal subjects, rotation in the pitch plane elicited an increase in respiratory frequency due to a shortening of the time for expiration, whilst patients had inconsistent responses. We conclude that vertical semicircular canal activity exerts a regulatory drive on respiration in human subjects. (C) 2001 Published by Elsevier Science Ireland Ltd MH - United Kingdom MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 13 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000166872500005 L2 - vestibular system;semicircular canals;respiration;autonomic reflexes;STIMULATION; MUSCLES SO - Neuroscience Letters 2001 ;298(1):17-20 3270 UI - 14564 AU - Jauregui-Renaud K AU - Faldon ME AU - Gresty MA AU - Bronstein AM AD - Natl Hosp Neurol & Neurosurg, MRC, HMBU, London WC1N 3BG, EnglandInst Mexicano Seguro Social, CMN Raza, Mexico City, DF, MexicoFaldon, ME, Natl Hosp Neurol & Neurosurg, MRC, HMBU, 8-11 Queen Sq, London WC1N 3BG, England TI - Horizontal ocular vergence and the three-dimensional response to whole-body roll motion AB - We evaluated the human binocular response to roll motion in the dark and during visual fixation with horizontal convergence. Six normal human subjects were exposed to manually driven, whole-body rotation about an earth-vertical, naso-occipital axis, under two conditions: (I) oscillation at 0.4 Hz (peak velocity 69+/-3.8 degrees /s) in the dark, and whilst fixating an axial light-emitting diode at 48 cm ('near') and at 206 cm ('far'); (II) constant velocity rotation (56.5+/-3.1 degrees /s) for 40 s, clockwise and counter-clockwise, in the dark, and sudden stops. Eye and head movements were monitored using scleral search coils. In head-fixed, angular velocity coordinates roll motion always evoked conjugate ocular torsion, with small conjugate horizontal and disconjugate vertical components. The resultant binocular eye responses were rotations about convergent axes. During oscillation with target fixation the convergence of the rotation axes was larger than that predicted by target geometry, producing disconjugate oscillations of vertical gaze about the target ('skewing'). Fast-phase eye movements were primarily resetting rotations about the same convergent rotation axes as the slow phases, but the small vertical velocity components had oscillatory, asymmetrical profiles. In response to velocity steps the slow-phase eye velocity decayed exponentially with time constants of 4.5+/-1.5 s for the torsional component and 5.8+/-1.9 s for the 'vertical vergence' component (right eye-left eye recordings). We conclude that in normal human subjects dynamic vertical canal stimulation with horizontal gaze convergence evokes rotation of the eyes about convergent axes and a small skewing of the eyes MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Neurosciences U5 - J;Article AV - English IS - 0014-4819 UR - ISI:000166225400008 L2 - human;vestibule-ocular reflex;semicircular canals;head roll;skew;HUMAN VESTIBULOOCULAR REFLEX; TILT REACTION; SKEW DEVIATION; ROTATIONAL KINEMATICS; VELOCITY; HEAD; LESIONS; MONKEY; LAW SO - Experimental Brain Research 2001 ;136(1):79-92 3271 UI - 12874 AU - Jauregui R AU - Poli N AU - Roati G AU - Modugno G AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Florence, LENS, INFM, I-50125 Florence, ItalyJauregui, R, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Anharmonic parametric excitation in optical lattices AB - We study both experimentally and theoretically the losses induced by parametric excitation in far-off-resonance optical lattices. The atoms confined in a one-dimensional sinusoidal lattice present an excitation spectrum and dynamics substantially different from those expected for a harmonic potential. We develop a model based on the actual atomic Hamiltonian in the lattice and we introduce semiempirically a broadening of the width of lattice energy bands which can physically arise from inhomogeneities and fluctuations of the lattice, and also from atomic collisions. The position and strength of the parametric resonances and the evolution of the number of trapped atoms are satisfactorily described by our model MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000170978600071 L2 - CESIUM ATOMS SO - Physical Review A 2001 ;6403(3): 3272 UI - 12792 AU - Javelle A AU - Rodriguez-Pastrana BR AU - Jacob C AU - Botton B AU - Brun A AU - Andre B AU - Marini AM AU - Chalot M AD - Univ Nancy 1, UMR INRA, UHP 1136 Interact Arbres Microorganismes, F-54506 Vandoeuvre Les Nancy, FranceUniv Autonoma Tlaxcala, Ctr Rech Sci Biol, Biotechnol Lab, Mexico City, DF, MexicoFree Univ Brussels, Lab Physiol Cellulaire, Inst Biol & Med Mol, B-6041 Gosselies, BelgiumChalot, M, Univ Nancy 1, UMR INRA, UHP 1136 Interact Arbres Microorganismes, POB 239, F-54506 Vandoeuvre Les Nancy, France TI - Molecular characterization of two ammonium transporters from the ectomycorrhizal fungus Hebeloma cylindrosporum AB - Heterologous expression of the yeast triple Mep mutant has enabled the first molecular characterization of AMT/MEP family members in an ectomycorrhizal fungus. External hyphae, which play a key role in nitrogen nutrition of trees, are considered as the absorbing structure of the ectomycorrhizal symbiosis and therefore molecular studies on ammonium transport in hyphae are urgently needed. The kinetic properties of AMT2 and AMT3 from Hebeloma cylindrosporum were studied in Saccharomyces cerevisiae. Expression of HcAmts in the yeast triple Mep mutant restored ammonium retention within cells. The HcAmts did not complement the ammonium sensing defect phenotype of Mep2 Delta cells during pseudohyphal differentiation. Northern blot analysis in H. cylindrosporum showed that the HcAMTs were up-regulated upon nitrogen deprivation and down-regulated by ammonium. (C) 2001 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Belgium MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000171272500011 L2 - ammonium transport;methylamine;nitrogen regulation;Hebeloma cylindrosporum;Saccharomyces cerevisiae;SACCHAROMYCES-CEREVISIAE; ARABIDOPSIS; NITRATE; PLANTS; ROOTS; YEAST; STARVATION; EXPRESSION; MEMBRANE; ENZYMES SO - Febs Letters 2001 ;505(3):393-398 3273 UI - 13588 AU - Jergel M AU - Cheang-Wong JC AU - Rickards J AU - Jergel M AU - Chromik S AU - Falcony C AU - Plecenik A AU - Andrade E AD - CINVESTAV, IPN, Dept Fis, Mexico City 14000, DF, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoSlovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaJergel, M, CINVESTAV, IPN, Dept Fis, Apdo Postal 14-740, Mexico City 14000, DF, Mexico TI - Study of the fluorine content in precursor and Tl-based thin films by resonant nuclear reaction method AB - We prepared thin Tl-based films from Ba-Ca-Cu(O,F) precursors containing various amount of fluorine. The precursor films, 150 200 nm thick, were deposited on MgO substrates by sequential thermal evaporation of BaF2, Cu and CaF2 components. Before thallination, some of these precursors underwent a various degree of an ex-situ vacuum annealing with the aim to remove fluorine from the films. The fluorine content of three types of precursor films (as-deposited, partially annealed, fully annealed) was investigated by the resonant nuclear reaction method. Precursors were then thallinated and the amount of fluorine in superconducting films was measured again. Besides, films were characterized by resistance vs. temperature measurements and by X-ray diffraction (Bragg-Brentano and grazing incidence geometry) as well as by Rutherford back-scattering spectrometry (chemical composition). Results of these investigations are reported. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000168952100069 L2 - precursor and Tl-based films;fluorine content;resonant nuclear reaction method;ROUTE SO - Physica C 2001 ;354(1-4):353-357 3274 UI - 14197 AU - Jilge B AU - Hudson R AD - Univ Ulm, Lab Anim Res Unit, D-89069 Ulm, GermanyNatl Autonomous Univ Mexico, Inst Biomed Res, Mexico City 04510, DF, MexicoJilge, B, Univ Ulm, Lab Anim Res Unit, D-89069 Ulm, Germany TI - Diversity and development of circadian rhythms in the European rabbit AB - Three main concerns underlie this review: 1)The need to draw together the widely dispersed information available on the circadian biology of the rabbit. Although the rabbit is a classic laboratory mammal, this extensive body of information is often overlooked by chronobiologists, and despite several advantages of this species. In terms of its general biology the rabbit is the best studied laboratory mammal in the wild, it demonstrates a wide variety of robust circadian functions, and being a lagomorph, it provides a useful comparison with more commonly studied rodent species. 2) The need to more fully exploit a developmental approach to understanding circadian function, and the particular suitability of the rabbit for this. Female rabbits only visit their altricial young for a few minutes once every 24 h to nurse, and survival of the young depends on the tight circadian-controlled synchronization in behavior and physiology of the two parties. Patterns of circadian rhythmicity in neonatal pups associated with nursing do not form a smooth continuum into weaning and adult life, and may reflect the action of separate mechanisms operating in their own right. 3) Using information from the first two points, to emphasize the diversity and complexity of circadian rhythms underlying behavioral and physiological functions in adult and developing mammals. Information accruing on circadian functions in the rabbit makes it increasingly difficult to account for these in terms of one or two regulatory mechanisms or "oscillators." Thus, it is argued that in addition to the reductionist, molecular approaches currently dominating much of chronobiology, the study of circadian systems as emergent characteristics of whole organisms operating in complex environments merits special attention MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 17 U4 - Biology;Physiology U5 - J;Review AV - English IS - 0742-0528 UR - ISI:000167274900001 L2 - circadian oscillators;light entrainment;feeding entrainment;nursing entrainment;development;mammals;SUCKLING-ASSOCIATED AROUSAL; RUNNING ACTIVITY RHYTHMS; NIPPLE-SEARCH BEHAVIOR; FOOD-INTAKE PATTERN; NEWBORN RABBITS; LIGHT-DARK; ORYCTOLAGUS-CUNICULUS; INTRAOCULAR-PRESSURE; FUNCTIONAL-ANALYSIS; NOCTURNAL RODENTS SO - Chronobiology International 2001 ;18(1):1-26 3275 UI - 12203 AU - Jimenez-Mier J AU - Whitfield SB AU - Wehlitz R AU - az-Jimenez H AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Phys & Astron, Eau Claire, WI 54702, USAUniv Wisconsin, Ctr Synchrotron Radiat, Stoughton, WI 53589, USAJimenez-Mier, J, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Core polarization effects in the decay of 1s -> np (n=2-6) resonantly excited beryllium AB - The photoelectron angular distribution parameter of the relevant decay channels following the resonant 1s --> np (n = 2-6) excitations in beryllium was measured. The 2s and 3s photoelectrons present at the 2p and 3p resonances, respectively, have beta = 2 as predicted by theory. For the mp' spectator channels, small but distinct deviations from the expected complete isotropy were found. An explanation of these deviations is proposed in terms of the polarization of the 2s(2) subshell due to the excited np electron MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000172577700004 L2 - ANGULAR-DISTRIBUTION; AUGER ELECTRONS; SPECTRA; IONS SO - Journal of Physics B-Atomic Molecular and Optical Physics 2001 ;34(21):L693-L700 3276 UI - 14182 AU - Jimenez-Vazquez HA AU - Tamariz J AU - Cross RJ AD - IPN, Escuela Nacl Ciencias Biol, Dept Quim Organ, Mexico City 11340, DF, MexicoYale Univ, Dept Chem, New Haven, CT 06520, USAJimenez-Vazquez, HA, IPN, Escuela Nacl Ciencias Biol, Dept Quim Organ, Prol Carpio & Plan Ayala,Col Sto Tomas, Mexico City 11340, DF, Mexico TI - Binding energy in and equilibrium constant of formation for the dodecahedrane compounds He@C20H20 and Ne@C20H20 AB - Using high-level ab initio methods, the binding energies were calculated for helium and neon inside the cage-like dodecahedrane molecule C20H20 The binding energy of He@C20H20 is 33.8 kcal/mol, including the change in zero-point energy. The corresponding energy for Ne@C20H20 is 98.3 kcal/mol. The He-3 nuclear magnetic resonance chemical shift is 1.51 ppm, relative to He-3 outside the molecule. The equilibrium constant for He@C20H20 was calculated, and the pressure corresponding to the experimentally synthesized compound is 4 x 10(26) atm MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000167268300014 L2 - DENSITY-FUNCTIONAL THEORY; NMR CHEMICAL-SHIFTS; CONFORMATIONAL-ANALYSIS; MOLECULAR MECHANICS; FULLERENE COMPOUNDS; SHIELDING TENSORS; FORCE-FIELD; GAS ATOMS; HELIUM; PREDICTION SO - Journal of Physical Chemistry A 2001 ;105(8):1315-1319 3277 UI - 12908 AU - Jimenez-Vicente J AU - Battaner E AU - Porcel C AU - Rozas M AU - Castaneda H AD - Univ Granada, Dept Fis Teor & Cosmos, Granada 18071, SpainInst Astrofis Canarias, E-38200 La Laguna, SpainUNAM, Observ Ensenada, Mexico City, DF, MexicoJimenez-Vicente, J, Univ Granada, Dept Fis Teor & Cosmos, Granada 18071, Spain TI - Vertical velocity dispersion of the ionized gas in NGC 3938 AB - We have studied the kinematics of the ionized gas in the nearly face-on galaxy NGC 3938 by means of observations made with the Fabry-Perot interferometer TAURUS II at the William Herschel Telescope, using the H-alpha line. We have been able to produce high-resolution velocity and velocity-dispersion maps which allow us to make a detailed study of the kinematics of the ionized gas. In particular we have found that the vertical velocity dispersion is constant with galactocentric radius, as has already been found for the atomic and molecular gas in this galaxy. This suggests the existence of several heating mechanisms in the disc acting simultaneously to produce the observed behaviour MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000170945400013 L2 - INTERSTELLAR-MEDIUM; GALAXIES; NGC-3938; DISK SO - Astrophysics and Space Science 2001 ;276(2-4):445-449 3278 UI - 12893 AU - Jimenez JC AU - Necchi O AD - Univ Estadual Paulista, Dept Bot & Zool, BR-15054000 Sao Jose Do Rio Preto, SP, BrazilNatl Autonomous Univ Mexico, Fac Ciencias, Lab Ficol, Mexico City 04510, DF, MexicoNecchi, O, Univ Estadual Paulista, Dept Bot & Zool, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil TI - A new species and expanded distributions of freshwater Audouinella (Acrochaetiaceae, Rhodophyta) from Central Mexico and south-eastern Brazil AB - Eighteen collections of red-coloured Audouinella from Central Mexico and southeastern Brazil detected three species. The most common species, A. eugenea, is characterized by macroscopic thalli, the erect system consisting of filaments with cylindrical cells, undifferentiated into proximal and distal parts, and relatively large monosporangia (greater than or equal to 12.0 mum long). Spermatangia. and possible propagules were observed in some Mexican populations. This is the third Audouinella species observed to have gametangia and the first member of the Acrochaetiales with putative propagules. The second species, from Central Mexico, was characterized by the following features: macroscopic thalli, the erect system differentiated into proximal parts with cylindrical cells, unbranched or rarely branched, and distal parts with barrel-shaped cells, abundantly branched to form dense fascicles, with alternate or dichotomous branching, some at right-angles to the axis, and relatively large monosporangia (greater than or equal to 12.0 mum long). The morphologically distinct proximal and distal portions of the erect system, the latter forming dense fascicles, was a consistent character so far unknown in Audouinella; thus, we propose a new species, A. huastecana sp. nov. The third species is a microscopic epiphyte, A. meiospora, with a well-developed prostrate system composed of creeping and loosely aggregated filaments, and a short homogeneous erect system (less than or equal to 15 cells) of filaments with cylindrical or barrel-shaped cells and small monosporangia (less than or equal to 13.0 mum long). A. eugenea and A. meiospora are characterized for the first time from the Southern and Northern Hemispheres, respectively, both occurring mostly in areas of tropical or subtropical rainforests. A. meiospora is reported from new macroalgal hosts. A. eugenea and A. huastecana tended to occur in warm, alkaline waters with a high ion content that were moderate to fast flowing, whereas A. meiospora was not associated with particular habitats MH - Brazil MH - Mexico|Distrito Federal PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0967-0262 UR - ISI:000170916400002 L2 - Acrochaetiaceae;Audouinella;Audouinella huastecana;Brazil;Mexico;Rhodophyta;stream SO - European Journal of Phycology 2001 ;36(3):217-226 3279 UI - 14274 AU - Jimenez JR AU - Villa-Diharce E AU - Flores M AD - Univ Texas, Austin, TX 78712, USACtr Invest Matemat AC, Guanajuato, MexicoNatl Pk Serv, Washington, DC 20240, USAJimenez, JR, Univ Texas, Austin, TX 78712, USA TI - Nonparametric estimation of the dependence function in bivariate extreme value distributions AB - The paper considers the problem of estimating the dependence function of a bivariate extreme survival function with standard exponential marginals. Nonparametric estimators for the dependence function are proposed and their strong uniform convergence under suitable conditions is demonstrated. Comparisons of the proposed estimators with other estimators are made in terms of bias and mean squared error. Several real data sets from various applications are used to illustrate the procedures. (C) 2001 Academic Press MH - Mexico|Guanajuato MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0047-259X UR - ISI:000167083100001 L2 - empirical distribution function;greatest convex minorant;weak convergence;Gaussian process;MULTIVARIATE DISTRIBUTIONS; IFRA DISTRIBUTION; VALUE COPULAS SO - Journal of Multivariate Analysis 2001 ;76(2):159-191 3280 UI - 13683 AU - Jimenez R AU - Scepin EV AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoVA Steklov Math Inst, Moscow 117966, RussiaJimenez, R, UNAM, Inst Matemat, Av Univ S-N,Col Lomas de Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - On linking of cycles in locally connected spaces AB - The paper is devoted to studying the linking of cycles with compacta in LCn-spaces and in particular homology Z-sets. The main two consequences of our considerations are the following: (1) It is proved that a k-dimensional polyhedron cannot link a (n - k - 1)-dimensional cycle in an n-dimensional Menger manifold. (2) It is proved that a compact set in an ENR is a homology Z-set provided all its points are homology Z-sets, (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000168641800009 L2 - linked cycles;Menger manifolds;homology Z-set SO - Topology and Its Applications 2001 ;113(1-3):69-79 3281 UI - 12267 AU - Joguet B AU - Kunth D AU - Melnick J AU - Terlevich R AU - Terlevich E AD - Inst Astrophys, F-75014 Paris, FranceEuropean So Observ, Santiago 19, ChileUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoJoguet, B, Inst Astrophys, 98bis Blvd Arago, F-75014 Paris, France TI - Stellar populations in Seyfert 2 galaxies - I. Atlas of near-UV spectra AB - We have carried out a uniform spectroscopic survey of Seyfert 2 galaxies to study the stellar populations of the host galaxies. New spectra have been obtained for 79 Southern galaxies classified as Seyfert 2 galaxies, 7 normal galaxies, and 73 stars at a resolution of 2.2 Angstrom over the wavelength region 3500-5300 Angstrom. Cross-correlation between the stellar spectra is performed to group the individual observations into 44 synthesis standard spectra. The standard groups include a solar abundance sequence of spectral types from O5 to M3 for dwarfs, giants, and supergiants. Metal-rich and metal-weak F-K giants and dwarfs are also included. A comparison of the stellar data with previously published spectra is performed both with the individual spectra and the standard groups. For each galaxy, two distinct spatial regions are considered: the nucleus and the external bulge. Spectroscopic variations from one galaxy to another and from the central to the external region are briefly discussed. It is found that the central region of a Seyfert 2 galaxy, after subtracting the bulge stellar population, always shows a near-UV spectrum similar to one of three representative categories: a) many strong emission lines and only two visible absorption lines (Ca II K and G band) (Sey2e); b) few emission lines, many absorption lines, and a redder continuum than the previous category (Sey2a); c) an almost at continuum and high-order Balmer lines seen in absorption (Sey2b). The proportion of Seyfert 2 galaxies belonging to each class is found to be 22%, 28%, and 50% respectively. We find no significative differences between morphology distributions of Seyfert 2 galaxies with Balmer lines detected in absorption and the rest of the sample. This quick look through the atlas indicates that half of Seyfert 2 galaxies harbour a young stellar population (about or less than 100 Myr) in their central region, clearly unveiled by the high order Balmer series seen in absorption MH - Chile MH - United Kingdom MH - France MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000172547900010 L2 - atlases;galaxies : active;galaxies : Seyfert;galaxies : starburst;galaxies : stellar content;BROAD-LINE REGIONS; CATALOG; COMPILATION; VELOCITIES; CONTINUUM; REDSHIFTS; OBJECTS; LIBRARY; INDEXES; SAMPLE SO - Astronomy & Astrophysics 2001 ;380(1):19-30 3282 UI - 12464 AU - Johanneson B AU - Lima G AU - arcon-Riquelme M AD - Univ Uppsala, Dept Genet & Pathol, S-75185 Uppsala, SwedenInst Nacl Cien Med Nutr, Dept Immunol Rheumatol, Mexico City 1400, DF, Mexico TI - Analysis of chromosome 1 for SLE susceptibility loci in a new set of 69 multicase families MH - Mexico|Distrito Federal MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901972 SO - American Journal of Human Genetics 2001 ;69(4):518-518 3283 UI - 13851 AU - Johnson CD AU - Romero J AU - Raimundez-Urrutia E AD - No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011, USAColegio Postgrad Montecillo, Inst Fitosanidad, Programa Entomol & Acarol, Mexico City 56230, DF, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Ctr Bot Trop, Caracas, VenezuelaJohnson, CD, No Arizona Univ, Dept Biol Sci, Box 5640, Flagstaff, AZ 86011 USA TI - Ecology of Amblycerus crassipunctatus Ribeiro-Costa (Coleoptera : Bruchidae) in seeds of Humiriaceae, a new host family for bruchids, with an ecological comparison to other species of Amblycerus AB - In Venezuela Amblycerus crassipunctatus Ribeiro-Costa feeds in seeds of Vantanea minor Bentham. Humiriaceae. a new host family for the Bruchidae. Species of Amblycerus Thunberg now are known to feed in from 11 to 14 families of plants, more than any other bruchid genus. Ecological relationships of A. crassipunctatus with its host were compared to A. nigromarginatus (Motschulsky). A. luteonotatus (Pic), A. dispar (Sharp), A. guazumicola Kingsolver and Johnson. A. vitis (Schaeffer). A. acapulcensis Kingsolver. A. robiniae (Fabricius), A. hoffmanseggi (Gyllenhal). A. testaceus (Pic). A. submaculatus (Pic), A. cistelinus (Gyllenhal), A. longesuturalis (Pic), and A. schwarzi Kingsolver and their hosts. A. crassipunctatus damaged 28.5% to 39% of V. minor fruits examined. In other species of Amblycerus where these figures are available, from 01.0% to 61% of the fruits were damaged. We found that eggs of almost all of the species discussed have a similar flange with glue on the periphery. This kind of attachment may prevent the egg from becoming detached from the fruit as it matures and during eclosion of the first instar larva or protect eggs against mechanical injuries. Larvae of most species of Amblycerus feed in several seeds during their development, but A. dispar and A. vitis feed in only one seed. Apparently almost all species of Amblycerus spin a cocoon for pupation. This was evolved probably because the large size of the adults led to the habit of feeding in several seeds. Most bruchids are much smaller in body size than species of Amblycerus and thus pupate inside a single seed that negates the need for a cocoon MH - USA MH - Mexico|Distrito Federal MH - Venezuela PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000168258800005 L2 - ATTACKING; BEETLES SO - Coleopterists Bulletin 2001 ;55(1):37-48 3284 UI - 14263 AU - Johnson ME AU - Ledesma-Vazquez J AD - Williams Coll, Dept Geosci, Williamstown, MA 01267, USAUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoJohnson, ME, Williams Coll, Dept Geosci, Williamstown, MA 01267, USA TI - Pliocene-Pleistocene rocky shorelines trace coastal development of Bahia Concepcion, gulf coast of Baja California Sur (Mexico) AB - Pliocene rocky-shore deposits on the east coast of Baja California Sur (Mexico) formed under the influence of tectonic events and changing relative sea level in the Gulf of California. Depositional patterns are represented by two distinct styles of marine transgression. Level-bedded deposits in semi-enclosed basins form steep buttress unconformities similar in profile to basin fill detected through seismic stratigraphy. Such deposits are typical of sheltered rocky shores, where erosion of terrestrial materials is limited by low wave energy and/or slow rates of changing sea level. Ramp deposits form low-angle (5-9 degrees) unconformities on exposed rocky shores, where erosion is enhanced by high wave energy and/or rapid rates of changing sea level. These conform to the pattern of coastal or marine onlap in seismic stratigraphy. With an area of 270 km(2), Bahia Concepcion is one of the largest fault-bound bays in the Gulf of California. It occupies a half-graben structure that opens on the gulf to the north. An additional 100 km of coastline was formed after Pliocene flooding of the Bahia Concepcion graben. Sheltered rocky shores are represented by buttress unconformities between Miocene volcanics (Comondu Group) and Upper Pliocene strata in small, connected basins at the southeast end of the bay. Dating is based on Clypeaster marquerensis (sand dollar) and associated mollusks in limestones from the Bahia Concepcion Member of the Infierno Formation. Other unconformities with the Comondu on the open gulf coast adjacent to Bahia Concepcion take the form of carbonate ramps. At Punta Chivato, 20 km north of the bay mouth, the San Marcos Formation is traditionally considered Early Pliocene in age based on Clylpeaster bowersi (echinoid) and Solenastren fairbanksi (coral). At San Nicolas, 15 km east from the southern terminus of the bay, C. bowersi likewise dates the basal Pliocene. Parallel to the axis of the bay, the Bahia Concepcion fault zone is no older than the Miocene, because it cuts through the Comondu Group. The main expansion zone for the protogulf jumped over this zone to the east, where Lower Pliocene conglomerates were deposited on a faulted coast between Punta Chivato and San Nicolas. Along this front, eroded andesite cobbles predominate as a component of the basal Pliocene, but rare granodiorite cobbles indicate a Cretaceous source brought to the surface from considerable depth. Punta Chivato, Bahia Concepcion and the San Nicolas areas retain widespread Upper Pleistocene rocky-shore deposits unconformable with Pliocene strata or the Miocene Comondu. Granodiorites eroded from Punta San Antonio also form the basis for an Upper Pleistocene rocky-shore. These deposits usually are near the 12-m elevation regionally associated with substage 5e terraces (120-135 Ka). Their uniformity in elevation inside and outside Bahia Concepcion indicates that minor tectonic uplift was locked in step throughout the immediate region by that time. (C) 2001 Elsevier Science Ltd All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Geography, Physical;Geosciences, Multidisciplinary;Paleontology U5 - J;Article AV - English IS - 0031-0182 UR - ISI:000167007300007 L2 - ramp unconformities;buttress unconformities;Pliocene-Pleistocene rocky shores;Gulf of California;EVOLUTION; TECTONICS; SERIES; SHORES SO - Palaeogeography Palaeoclimatology Palaeoecology 2001 ;166(1-2):65-88 3285 UI - 14051 AU - Jones BA AU - DeMaster DP AD - Prescott Coll, Ctr Cultural & Ecol Studies, Bahia De Kino 83340, Sonora, MexicoNOAA, Natl Marine Fisheries Serv, Alaska Fisheries Sci Ctr, Narl Marine Mammal Lab, Seattle, WA 98115, USAJones, BA, Prescott Coll, Ctr Cultural & Ecol Studies, APDO 69, Bahia De Kino 83340, Sonora, Mexico TI - Survivorship of captive southern sea otters MH - Mexico|Sonora MH - USA PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000167718700017 L2 - SURVIVAL SO - Marine Mammal Science 2001 ;17(2):414-418 3286 UI - 14055 AU - Josa M AU - Urizar JP AU - Rapado J AU - os-Vieitez C AU - Castaneda-Hernandez G AU - Flores-Murrieta F AU - Renedo MJ AU - Troconiz IF AD - Univ Navarra, Fac Pharm, Dept Pharm & Pharmaceut Technol, E-31080 Pamplona, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Pharmacol & Toxicol, Mexico City 07000, DF, MexicoInst Politecn Nacl, Escuela Super Med, Mexico City, DF, MexicoTroconiz, IF, Univ Navarra, Fac Pharm, Dept Pharm & Pharmaceut Technol, E-31080 Pamplona, Spain TI - Pharmacokinetic/pharmacodynamic modeling of antipyretic and anti-inflammatory effects of naproxen in the rat AB - Pharmacokinetic/pharmacodynamic modeling was used to characterize the antipyretic and anti-inflammatory effects of naproxen in rats. An indirect response model was used to describe the antipyretic effects of naproxen after short intravenous infusions. The model assumes that basal temperature (T-a) is maintained by the balance of fever mediators given by a constant (zero order) rate of synthesis (K-syn), and a first order rate of degradation (K-out). After an intraperitoneal injection of lipopolysaccharide, the change in T-a was modeled assuming an increase in fever mediators described as an input rate function [IR(t)] estimated nonparametrically. An inhibitory E-max model adequately described the inhibition of IR(t) by naproxen. A more complex model was used to describe the anti-inflammatory response of oral naproxen in the carrageenin-induced edema model. Before carrageenin injection, physiological conditions are maintained by a balance of inflammation mediators given by K-syn and K-out (see above). After carrageenin injection, the additional synthesis of mediators is described by IR(t) (see above). Such mediators induced an inflammatory process, which is governed by a first order rate constant (K-IN) that can be inhibited by the presence of naproxen in plasma. The sigmoidal E-max model also well described the inhibition of K-IN by naproxen. Estimates for IC50 [concentration of naproxen in plasma eliciting half of maximum inhibition of IR(t) or K-IN] were 4.24 and 4.13 mg/ml, for the antipyretic and anti-inflammatory effects, respectively MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0022-3565 UR - ISI:000167756700025 L2 - NONSTEROIDAL ANTIINFLAMMATORY DRUGS; PHARMACOKINETICS; IBUPROFEN; CYCLOOXYGENASE-2; PHARMACODYNAMICS; ACETAMINOPHEN; KETOPROFEN; INHIBITION; CHILDREN; PAIN SO - Journal of Pharmacology and Experimental Therapeutics 2001 ;297(1):198-205 3287 UI - 12829 AU - Jose-Yacaman M AU - Marin-Almazo M AU - Ascencio JA AD - Univ Texas, Dept Chem Engn, Texas Mat Inst Ctr Nano & Mol Technol, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Del Alvaro Obregon 01000, DF, MexicoInst Nacl Invest Nucl, Mexico City 06100, DF, MexicoJose-Yacaman, M, Univ Texas, Dept Chem Engn, Texas Mat Inst Ctr Nano & Mol Technol, Austin, TX 78712 USA TI - High resolution TEM studies on palladium nanoparticles AB - In the present work, we discuss the analysis of Pd nanoparticles in the range of 1-5 nm using high resolution electron microscopy (HREM). Particles were grown using colloidal methods. The principles of the observation of HREM images and their study using the corresponding FFT of the images are discussed. The results show that particles have the following shapes: FCC cubo-octahedrons, icosahedrons, truncated decahedrons and single-twinned FCC configuration. Each one of those structures is discussed and images are shown. We also found that a fraction of the particles corresponds to a short range ordered amorphous phase. The future of HREM observations of nanoparticles is also discussed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000171099300004 L2 - palladium nanoparticles;electron microscopy of nanoparticles;nanomorphology;crystalline structure of palladium nanoparticles;MULTIPLY-TWINNED PARTICLES; ELECTRON-MICROSCOPE; METAL PARTICLES; PD PARTICLES; GOLD; CATALYSTS; SILVER SO - Journal of Molecular Catalysis A-Chemical 2001 ;173(1-2):61-74 3288 UI - 13714 AU - Joseph GG AU - Zenit R AU - Hunt ML AU - Rosenwinkel AM AD - CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoJoseph, GG, CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125, USA TI - Particle-wall collisions in a viscous fluid AB - This paper presents experimental measurements of the approach and rebound of a particle colliding with a wall in a viscous fluid. The particle's trajectory was controlled by setting the initial inclination angle of a pendulum immersed in a fluid. The resulting collisions were monitored using a high-speed video camera. The diameters of the particles ranged from 3 to 12 mm, and the ratio of the particle density to fluid density varied from 1.2 to 7.8. The experiments were performed using a thick glass or Lucite wall with different mixtures of glycerol and water. With these parameters, the Reynolds number defined using the velocity just prior to impact ranged from 10 to approximately 3000. A coefficient of restitution was defined from the ratio of the velocity just prior to and after impact. The experiments clearly demonstrate that the rebound velocity depends on the impact Stokes number (defined from the Reynolds number and the density ratio) and weakly on the elastic properties of the material. Below a Stokes number of approximately 10, no rebound of the particle occurred. For impact Stokes number above 500 the coefficient of restitution appears to asymptote to the values for dry collisions. The coefficients of restitution were also compared with previous experimental studies, In addition, the approach of the particle to the wall indicated that the particle slowed prior to impacting the surface. The distance at which the particle's trajectory varied due to the presence of the wall was dependent on the impact Stokes number. The particle surface roughness was found to affect the repeatability of some measurements, especially for low impact velocities MH - Mexico|Distrito Federal MH - USA PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 36 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000168677100013 L2 - ELASTOHYDRODYNAMIC COLLISION; 2 SPHERES; VISCOSITY; FLOWS SO - Journal of Fluid Mechanics 2001 ;433():329-346 3289 UI - 13867 AU - Jou D AU - Criado-Sancho M AU - del Castillo LF AU - Casas-Vazquez J AD - Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, SpainInst Estudis Catalans, Barcelona 08001, SpainUNED, Dept Ciencias & Tecn Fisioquim, Madrid 28040, SpainUNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoJou, D, Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, Spain TI - A thermodynamic model for shear-induced concentration banding and macromolecular separation AB - We present a simple thermodynamic model for shear-induced concentration banding in polymer solutions, based on a nonequilibrium chemical potential depending on the shear rate. This dependence provides a coupling between diffusion and shear, besides the more classical coupling provided by the divergence of the viscous pressure tenser. When both couplings are taken into account, shear-induced concentration banding appears in a natural way. If the initial homogeneous concentration is higher than a threshold value, shear banding appears for sufficiently high value of the shear rate gamma; if the initial concentration is lower, the steady-state concentration profile under shear is smooth. The banding profile depends on the polymer molecular mass and therefore it provides a basis for the chromatographic separation of polymers of different molecular mass. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000168215500029 L2 - viscous pressure;shear-induced concentration banding;macromolecules;EXTENDED IRREVERSIBLE THERMODYNAMICS; POLYMER-SOLUTIONS; PHASE-SEPARATION; FLOW; FLUCTUATIONS; MIGRATION; FLUIDS; SHIFT; MELTS SO - Polymer 2001 ;42(14):6239-6245 3290 UI - 12587 AU - Jouanne M AU - Morhange JF AU - Kanehisa MA AU - Haro-Poniatowski E AU - Fuentes GA AU - Torres E AU - Hernandez-Tellez E AD - Univ Paris 06, Lab Milieux Desordonnes & Heterogenes, CNRS, UMR 7603, F-75252 Paris 05, FranceUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoTorres, E, Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Structural transformation in nanosized zirconium oxide AB - Structural properties of calcined ZrO2 nanopowders having various sizes were investigated by Raman spectroscopy, x-ray diffraction, and high-resolution transmission electron microscopy. For grain sizes of the order of a few nanometers the Raman spectrum is typical of an amorphous material as is the corresponding x-ray diffractogram. As the size of the grains increases, the spectra progressively evolve towards that of a crystallized sample, furthermore, two regimes of growth, vitreous and crystalline, are evidenced. As opposed to the acoustical, the optical branches exhibit a strong discontinuity near the amorphous-crystalline transition. From the analysis of the Raman spectra as a function of size one can infer the phonon dispersion curves that has so far been inaccessible by neutron diffraction. A simple analysis using a classic elastic model shows that the Raman frequencies of the acoustical phonon bands of the nanograins are linearly dependent upon their size MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000171694600073 L2 - SIO2 THIN-FILMS; RAMAN-SCATTERING; SILVER PARTICLES; NEUTRON-SCATTERING; SIZE DEPENDENCE; TETRAGONAL ZRO2; PHONONS; PHASE; MICROCRYSTALS; NANOCRYSTALS SO - Physical Review B 2001 ;6415(15): 3291 UI - 14125 AU - Jovanovic-Dolecek G AU - Dolecek V AD - INAOE, Dept Elect, Puebla, MexicoUC Sarajevo, Dept Engn Mech, Sarajevo, Bosnia & HercegJovanovic-Dolecek, G, INAOE, Dept Elect, Ap Postal 51 & 216, Puebla, Mexico TI - Method for narrowband minimum phase filter design AB - A method for narrowband minimum phase filter design, based on the interpolated FIR (IFIR) structure and the mipizing, is proposed. The interpolator in the IFIR structure is a sharpened comb filter. It is shown that this filter is of the minimum phase type, and that consequently mipizing needs to be applied to the shaping filter only MH - Bosnia & Herceg MH - Mexico|Puebla PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000167498800041 SO - Electronics Letters 2001 ;37(5):324-325 3292 UI - 13950 AU - Juan-Pineda D AU - Prassidis S AD - Univ Nacl Autonoma Mexico, Morelia 58089, Michoacan, MexicoUniv Fed Fluminense, Inst Matemat, Coordenacao Posgrad Matemat, BR-24020005 Niteroi, RJ, BrazilJuan-Pineda, D, Univ Nacl Autonoma Mexico, Campus Morelia,Apartado Postal 61-3, Morelia 58089, Michoacan, Mexico TI - On the lower Nil-groups of Waldhausen AB - Let Gamma = Gamma (0) *(G) Gamma (1) be an amalgamated free product, where G is a finitely generated central subgroup of Gamma (0) and Gamma (1). We show that the negative Waldhausen Nil-groups that appear in the calculation of the K-theory of Z Gamma vanish. If G = H x T-m is a decomposition of G with H a finite group and T the infinite cyclic group, we also show that the exponent of the NK0-group depends on the order of H MH - Brazil MH - Mexico|Michoacan PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0933-7741 UR - ISI:000168011100005 L2 - K-THEORY SO - Forum Mathematicum 2001 ;13(2):261-285 3293 UI - 13149 AU - Juan-Salles C AU - Prats N AU - Verges J AU - Ruiz M AU - Valls X AU - Gine J AU - Marco A AD - Clin Exot, E-08022 Barcelona, SpainUniv Autonoma Barcelona, Fac Vet, E-08193 Barcelona, SpainLab Diagnost Gen, E-08012 Barcelona, SpainClin Vet Drs Florit & Casas, E-08036 Barcelona, SpainJuan-Salles, C, Africam Safari, Dept Pathol, 11 Ote 2407, Puebla 72007, Mexico TI - Dermatosis in talapoin monkeys (Miopithecus talapoin) with response to zinc and animal protein MH - Mexico|Puebla MH - Spain PB - LONDON: BRITISH VETERINARY ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0042-4900 UR - ISI:000170145300015 L2 - DEFICIENCY; MODEL SO - Veterinary Record 2001 ;149(1):24-25 3294 UI - 14168 AU - Juarez-Figueroa LA AU - Wheeler CM AU - Uribe-Salas FJ AU - Conde-Glez CJ AU - Zamilpa-Mejia LG AU - Garcia-Cisneros S AU - Hernandez-Avila M AD - Inst Nacl Salud Publ, CISEI, Cuernavaca, Morelos, MexicoUniv New Mexico, Albuquerque, NM 87131, USAJuarez-Figueroa, LA, Inst Nacl Salud Publ, CISEI, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca, Morelos, Mexico TI - Human papillomavirus - A highly prevalent sexually transmitted disease agent among female sex workers from Mexico City AB - Background: Cervical cancer, a human papillomavirus (HPV)-caused neoplasia, is highly prevalent in Mexico. Goal: To determine the prevalence of HPV infection in female sex workers (FSW) from Mexico City and to assess the association between HPV infection and the characteristics of these women. Study Design: A questionnaire was applied to 495 FSW, Cervical cell specimens were obtained for DNA amplification and hybridization to detect 27 HPV types. A risk factor analysis was performed. Results: The overall prevalence of HPV infection was 48.9%. The prevalence of high-risk HPV types was 43%, whereas that of low-risk types was 24.6%. A total of 18.8% of study participants was infected with both high-risk and low-risk HPV types, and 28.5% were infected with two or more HPV types. Younger age and failure to use a condom were independently associated HPV risks (odds ratio, 7.3 and 2.3; 95% CI, 3.5-15.0 and 1.2-4.4, respectively). Conclusions: Infection with high-risk and multiple HPV types is high among Mexican FSW. This study corroborated a higher infection rate in younger women. A higher risk of HPV infection is also observed in women who have been involved with sex work for less than 1 year. However, condom use showed a protective effect against HPV infection MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 20 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0148-5717 UR - ISI:000167280600001 L2 - GENITAL HUMAN-PAPILLOMAVIRUS; CERVICAL-CANCER; OLIGONUCLEOTIDE PROBES; INFECTION; WOMEN; RISK; BEHAVIOR; DETERMINANTS; EPIDEMIOLOGY SO - Sexually Transmitted Diseases 2001 ;28(3):125-130 3295 UI - 14229 AU - Juarez-Islas JA AU - Mendez M AU - Zhou Y AU - Lavernia EJ AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Unidad Saltillo, Saltillo, Coahuila, MexicoUniv Calif Irvine, Dept Chem & Biochem Engn & Mat Sci, Irvine, CA 92697, USAJuarez-Islas, JA, Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Escolar S-N,Cd Univ, Mexico City 04510, DF, Mexico TI - Microstructure and segregation profiles of nitrogen-atomized Al-2.56 wt. % Fe powders MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000167219000012 L2 - RAPID SOLIDIFICATION SO - Journal of Materials Science Letters 2001 ;20(2):139-141 3296 UI - 12832 AU - Juarez-Martinez G AU - Garza C AU - Castillo R AU - Moreno A AD - Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, ScotlandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoMoreno, A, Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Circuito Exterior,CU,, Mexico City 04510, DF, Mexico TI - A dynamic light scattering investigation of the nucleation and growth of thaumatin crystals AB - The aim of this contribution is to show some important physical-chemical parameters that must be taken into account during the crystallization of proteins. For this purpose, we have calculated the overall free energy, the chemical potential, the entropy, and the enthalpy for a model protein. Dynamic light scattering techniques were used in order to study how far the system was from the equilibrium after obtaining single crystals. Additionally, we show the solubility plot of the model protein in order to explain the plausible crystal growing zone. We have also presented the first experimental approach to infer the equilibrium state by using light scattering techniques. Classical thermodynamic measurements were obtained and compared with our approach. It has also been possible to explain the role of ionic strength and temperature in the crystallization of thaumatin. Finally, we have demonstrated how our crystal quality predictions obtained from dynamic light scattering and X-ray diffraction analyses can be compared with classical predictions. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000171042700015 L2 - biocrystallization;nucleation;solubility;growth from solutions;X-ray diffraction;PROTEIN CRYSTALLIZATION SO - Journal of Crystal Growth 2001 ;232(1-4):119-131 3297 UI - 14116 AU - Juarez E AU - Diaz M AU - Whittaker PV AU - Rosado JL AD - Natl Inst Med Sci & Nutr, Mexico City, DF, MexicoUS FDA, Ctr Food Safety & Appl Nutr, Washington, DC 20204, USA TI - Digestibility of different sources of iron added to corn masa flour and corn tortilla MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103635 SO - Faseb Journal 2001 ;15(4):A634-A634 3298 UI - 13721 AU - Juarez LH AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 55532, DF, MexicoUniv Houston, Dept Math, Houston, TX 77204, USAJuarez, LH, Univ Autonoma Metropolitana Iztapalapa, Mexico City 55532, DF, Mexico TI - Numerical simulation of the sedimentation of an elliptic body in an incompressible viscous fluid AB - in this note we discuss the application of a methodology combining distributed Lagrange multiplier based fictitious domain techniques, finite element approximations and operator splitting, to the numerical simulation of the motion of an elliptic body falling in a Newtonian incompressible viscous fluid. The motion of the body is driven by the hydrodynamical forces and gravity. As qualitatively expected, the elliptic body rotates so that its broad side tends to be perpendicular to the how direction. (C) 2001 Academie des sciences/Editions scientifiques et medicales Elsevier SAS MH - Mexico|Distrito Federal MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Mechanics U5 - J;Article AV - English IS - 1620-7742 UR - ISI:000168605600010 L2 - incompressible viscous fluid;FICTITIOUS DOMAIN METHOD SO - Comptes Rendus de l Academie des Sciences Serie Ii Fascicule B-Mecanique 2001 ;329(3):221-224 3299 UI - 14393 AU - Julien C AU - Camacho-Lopez MA AU - Escobar-Alarcon L AU - Haro-Poniatowski E AD - Univ Paris 06, LMDH, UMR 7603, F-75252 Paris 05, FranceUniv Autonoma Metropolitana Iztapalapa, Lab Opt Cuant, Mexico City 09340, DF, MexicoInst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoJulien, C, Univ Paris 06, LMDH, UMR 7603, 4 Pl Jussieu,Case 86, F-75252 Paris 05, France TI - Fabrication of LiCoO2 thin-film cathodes for rechargeable lithium microbatteries AB - Polycrystalline thin films of lithium cobalt oxide were grown by pulsed-laser deposition (PLD) technique. Films of LiCoO2 were deposited onto Si substrates heated at temperature lower than 300 degreesC from a sintered composite target (LiCoO2 + Li2O) irradiated with a Nd:YAG laser. The structural characterizations of these films were carried out by X-ray diffraction and Raman scattering spectroscopy, which probe the local environment of cations in the LiCoO2 framework. Raman spectra of PLD LiCoO2 films were investigated as a function of various growth conditions as substrate temperature, partial oxygen pressure in the deposition chamber, and target composition. PLD LiCoO2 films obtained with a polycrystalline morphology were successfully used as cathode materials in lithium microbatteries. The Li//LiCoO2 cells were tested by cyclic voltammetry and galvanostatic charge-discharge techniques in the potential range 2.0-4.2 V. Specific capacity as high as 195 mC cm(-2) mum was measured on polycrystalline films. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 35 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000166685000031 L2 - lithium cobalt oxide;pulsed-laser deposition;thin film;intercalation compounds;lithium microbatteries;PULSED-LASER DEPOSITION; BATTERIES; LIMN2O4; ELECTRODE; DIFFUSION; CELLS; OXIDE SO - Materials Chemistry and Physics 2001 ;68(1-3):210-216 3300 UI - 12942 AU - Jung C AU - Ziemniak E AU - Carvajal M AU - Frank A AU - Lemus R AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoRuhr Univ Bochum, Fak Math, D-44801 Bochum, GermanyUniv Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoJung, C, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Comparison between phase space structures in coupled Morse systems and in various su(2) approximations AB - While Hamiltonians written in terms of position and momentum provide a transparent picture of the motion of a system, Hamiltonians written in terms of Lie algebras are easier to handle quantum mechanically. Therefore we are interested to know how to transform one into the other. Since the exact transformation often leads to complicated expressions, we look for approximations which preserve the essential features. As basic criterion we look for the degree of equality of the classical phase space structures. We illustrate our ideas for the case of two coupled Morse systems and its approximation in terms of the Lie algebra su(2), which is relevant to anharmonic models of molecular spectroscopy. (C) 2001 American Institute of Physics MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000170800800004 L2 - METHANE; MODEL; OSCILLATORS; SCATTERING; RESONANCES; VIBRATIONS; CONSTANTS; MOTION SO - Chaos 2001 ;11(3):464-473 3301 UI - 13175 AU - Jung C AU - Ziemniak E AU - Taylor HS AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62551, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoUniv So Calif, Dept Chem, Los Angeles, CA 90089, USAJung, C, UNAM, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62551, Morelos, Mexico TI - Extracting the CH chromophore vibrational dynamics of CHBrClF directly from spectra: Unexpected constants of the motion and symmetries AB - Recently Quack and co-workers have developed a spectroscopic Hamiltonian that uncovers for Bromochlorofluoromethane vibrational excitation in the electronic ground state, the anharmonicities and resonant interactions between the normal modes that determine and fit the measured spectrum. In this paper using this spectroscopic Hamiltonian (no PES) and simple quantum, semiclassical and nonlinear classical methods of analysis a great deal of further information is extracted. Namely in polyad 5 and 8 the energy levels are disentangled into three and four different types of simple motion respectively. Each type of motion gives rise to simple level series. Each series is the quantization of a simple to visualize intramolecular motion. Quantum numbers which are close to conserved quantities are assigned to every state. The most extraordinary of these motions is a rapid cone like rotation of the HC bond atop the asymmetrical triangular pyramid of the heavy part of the molecule. The spectrum of these states shows an approximate double degeneracy even though the molecule is of C-1 symmetry; the rapid circulation of the hydrogen atom causes the dynamics to become insensitive to the differences between the various halogen masses and positions. (C) 2001 American Institute of Physics MH - Mexico|Morelos MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 13 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000170172300015 L2 - FERMI RESONANCE STRUCTURE; OVERTONE SPECTRA; QUANTUM DYNAMICS; ACETYLENE SO - Journal of Chemical Physics 2001 ;115(6):2499-2509 3302 UI - 14396 AU - Jung C AU - Taylor HS AU - Jacobson MP AD - Univ So Calif, Los Angeles, CA 90089, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoPhys & Theoret Chem Lab, Oxford OX1 3QZ, EnglandTaylor, HS, Univ So Calif, Los Angeles, CA 90089, USA TI - The acetylene bending spectrum at similar to 10000 cm(-1): Quantum assignments in the midst of classical chaos AB - A combination of quantum mechanics, semiclassical mechanics, and nonlinear classical dynamics is used to extract the detailed internal molecular motions that underly the quantum eigenstates of acetylene with 16 quanta of total bend excitation. No potential energy surface is used; rather, the states are represented by an algebraic effective Hamiltonian that has been extensively refined against experimental data. The classical mechanical analysis reveals widespread chaos, but the quantum mechanical structure is surprisingly regular. Specifically, all 81 quantum states can be assigned a pair of semiclassical quantum numbers that reveal the underlying classical motions associated with each state. These classical motions range continuously between limiting-case motions that we refer to as local bend (one hydrogen bending) and counter-rotation (the two hydrogens undergoing circular motions in planes perpendicular to the CC axis). The first reason that the regularity in the quantum structure was previously undetected is that the identification of regular nodal coordinates, if any exist, of quantum wave functions in a multidimensional (i.e., greater than two dimensions) space is generally a difficult task; our success here was made possible by the identification in a reduced two-dimensional (2D) space of two families of periodic orbits (dynamic modes) which evolve with energy. Every quantum state reflects the quantization of the two dynamic mode system. The second reason for the undetected regularity is that the regular sequences of quantum levels that we have identified are interspersed among each other in energy, thus giving the appearance of a complex, unassignable spectrum MH - United Kingdom MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000166695700004 L2 - INTRAMOLECULAR VIBRATIONAL REDISTRIBUTION; DISPERSED FLUORESCENCE-SPECTRA; SEMICLASSICAL QUANTIZATION; ALGEBRAIC QUANTIZATION; PERTURBATION-THEORY; PERIODIC-ORBITS; DYNAMICS; STATE; ENERGY; SPECTROSCOPY SO - Journal of Physical Chemistry A 2001 ;105(4):681-693 3303 UI - 12029 AU - Jurado-Chichay Z AU - Walker GPL AD - Univ Hawaii, Dept Geol & Geophys, Honolulu, HI 96822, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, EnglandJurado-Chichay, Z, Univ Hawaii, Dept Geol & Geophys, 1680 East West Rd, Honolulu, HI 96822 USA TI - The intensity and magnitude of the Mangaone subgroup plinian eruptions from Okataina Volcanic Centre, New Zealand AB - The rhyolitic Okataina Volcanic Centre in the TVZ experienced 12 plinian eruptions in the period between 31 and similar to43 ka and their deposits are known as the Mangaone Subgroup. These pyroclastic deposits total 77 km(3). The mean Mangaone eruption volume is 6.0 km(3), although erupted volumes alternate between large and small throughout the subgroup and are nearly bimodal (42% are <0.5 km(3) DRE, and the remaining 58% are greater). Peak eruption intensities (mass discharge rates) of most of the plinian eruptions have been determined from lithic size distributions and theoretical models of pyroclast fallout from eruption plumes. Values range over more than an order of magnitude, from 6.2 x 10(7) to 3.9 x 10(8) kg s(-1). The total erupted masses (or 'magnitudes') of the units varies over a range of a factor of 60, from 2.5 x 10(11) to 1.5 x 10(13) kg. There is no apparent correlation between eruption intensities and the presence of pyroclastic flows: only two of the seven deposits with intensities >10(8) kg s(-1) have associated pyroclastic flows. There is a positive correlation between the intensity and the magnitude of the eruption, supporting previous models that suggest that intensity is positively related to the size of the magma chamber feeding the eruption. When compared with plinian eruptions from other volcanoes, the Mangaone Subgroup deposits fali in the middle of both the magnitude and intensity ranges, although they tend to have somewhat higher intensities at a given mass. Some deposits present inverse grading due to an increase in the eruption intensity as the eruption progressed. We examined temporal variations in column height and intensities in two of the 12 eruptions (units D and F) in detail using individual beds that represent successive chronostratigraphic levels. Minimum eruption durations were estimated for all units from modelled whole-deposit isopach data and compared with those from the individual beds of units D and F; the latter appear to result in more realistic eruption durations. The biggest of the Mangaone Subgroup eruptions had relatively high destructive potentials (areas up to 4200 km(2) were buried beneath 1 m of pumice fall). Eruptions like those occurring today could also pose a hazard to major population centres if the wind dispersed them towards such centres. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000173165500012 L2 - Okataina Volcanic Centre;Mangaone subgroup;silicic volcanism;pyroelastic deposits;Plinian;eruption dynamics;FALLOUT TEPHRA VOLUMES; MOUNT ST-HELENS; MAGMA DISCHARGE; COLUMN HEIGHT; 1980 ERUPTION; DYNAMICS; DEPOSITS; STRATIGRAPHY; CHRONOLOGY; THICKNESS SO - Journal of Volcanology and Geothermal Research 2001 ;111(1-4):219-237 3304 UI - 12030 AU - Jurado-Chichay Z AU - Walker GPL AD - Univ Hawaii, Dept Geol & Geophys, Honolulu, HI 96822, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, EnglandJurado-Chichay, Z, Univ Hawaii, Dept Geol & Geophys, 1680 East West Rd, Honolulu, HI 96822 USA TI - Variability of plinian fall deposits: examples from Okataina Volcanic Centre, New Zealand AB - Plinian eruptions are intense, sustained, open-vent volcanic outbursts that produce extensive beds of generally well-sorted and generally highly vesicular pumice fallen from eruption plumes up to 55 km high. Their deposits tend to be almost homogeneous throughout their thickness, although inverse grading commonly occurs. Here, we detail departures from this near homogeneity that we observed among the Mangaone Subgroup, a group of 12 plinian pumice-fall deposits from Okataina Volcanic Centre (one of the dormant rhyolitic volcanoes in the Taupe Volcanic Zone, New Zealand). We propose that plinian eruptions may pass through seven states, ranging from inception (commencement of activity, or renewed activity following a shutdown), waxing, steady discharge, climax, and waning leading to column collapse or shutdown (decrease to zero intensity). Some deposits include intercalated water-flushed ash-rich beds having a bimodal grain size. Other examples of non-homogeneity include phreatoplinian ashes that may alternate with the plinian pumice as though modulated by a delicate balance in water flux, and still other eruptions may switch completely from dry to wet conditions when the column wanes towards the latest stages of the eruptions. Pink pumice occurs in some deposits and is totally absent in others. We infer that it oxidized during temporary storage in or around the vent. Lithics are ubiquitous, and concentrations of them may indicate vent-wall collapses and explosive ejection of some of the resulting debris. Some lithic-rich horizons neither coincide with apparent variations in the plinian discharge nor interrupt it, as is the case with some rain-flushed bimodal beds. The events that produced these incongruent beds proceeded synchronously with, but independent of, the main plinian discharge, in an isolated portion of the vent system (such as a subsidiary vent). Other variations of density, vesicularity and crystallinity among the eruption products record the pre- and syn-eruptive history of the magma. A local inverse relationship between pumice density and crystallinity of one eruptive unit is inferred to reflect a control by crystals on vesiculation and fragmentation. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000173165500013 L2 - Okataina Volcanic Centre;Mangaone Subgroup;silicic volcanism;pyroclastic deposits;plinian;MOUNT ST-HELENS; PYROCLASTIC DEPOSITS; ERUPTION COLUMNS; MAGMA DISCHARGE; GRAIN-SIZE; TAUPO; VESUVIUS; DYNAMICS; NOVARUPTA; WAIMIHIA SO - Journal of Volcanology and Geothermal Research 2001 ;111(1-4):239-263 3305 UI - 13369 AU - Jurado E AU - Estrada E AU - Moles A AD - UANL, Fac Ciencias Forestales, Linares 67700, Nuevo Leon, MexicoMacquarie Univ, Dept Biol Sci, N Ryde, NSW 2109, AustraliaJurado, E, UANL, Fac Ciencias Forestales, AP 41, Linares 67700, Nuevo Leon, Mexico TI - Characterizing plant attributes with particular emphasis on seeds in Tamaulipan thornscrub in semi-arid Mexico AB - Seed mass, dispersal syndromes and other plant attributes were investigated for 111 species native to north-eastern Mexico. We investigated whether seeds from Mexico conformed to patterns of seed size and dispersal syndrome spectra found for floras in arid environments from around the world. The distribution of seed mass in the Mexican flora (0.03-598 mg) was generally similar to that found elsewhere. All of the major seed dispersal syndromes previously found in arid environments were represented in Mexico, although vertebrate dispersal (33 species) was unusually common. There were 31 species having wind-dispersed seeds, four ant-dispersed and 43 with no obvious dispersal morphology. Woody species were more likely to have large seeds and herbaceous species were more likely to have small seeds. Woody plants had proportionally more wind-dispersed and less animal-dispersed species than did herbaceous plants. We did not find the expected relationship between time of seed set of vertebrate-dispersed species and the presence of migratory birds or between time of seed set and optimum germination time. (C) 2001 Academic Press MH - Australia MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000169580600006 L2 - diaspore;seed size;dispersal;matorral;WOODY-PLANTS; SIZE; DISPERSAL; MASS; ESTABLISHMENT; RECRUITMENT; ADAPTATIONS; GRASSLAND; ECOLOGY; WEIGHT SO - Journal of Arid Environments 2001 ;48(3):309-321 3306 UI - 14000 AU - Just K AU - Oziewicz Z AU - Sucipto E AD - Univ Arizona, Dept Phys, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Fac Estudios Super, Apartado Postal 25, Mexico City 54700, DF, MexicoUniv Wroclaw, Inst Fizyki Teoretycznejplac, PL-50204 Wroclaw, PolandJust, K, Univ Arizona, Dept Phys, Tucson, AZ 85721, USA TI - Recovery of Dirac equations from their solutions AB - We deal with quantum field theory in the restriction to external Bose fields. Let (i gamma (mu) partial derivative (mu) - B)psi = 0 be the Dirac equation. We prove that a nonquantized Bose field B is a functional of the Dirac field psi whenever this psi is canonical. Performing the verification for B := m = const, which yields the free Dirac field, we also prepare the tedious verifications for all B which are nonquantized and static. Such verifications must not be confused, however, with the proof of our formula, which is shown in detail MH - Mexico|Distrito Federal MH - Poland MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000167822800016 SO - International Journal of Theoretical Physics 2001 ;40(1):219-227 3307 UI - 12435 AU - Juszkiewicz R AU - Gaztanaga E AD - Univ Geneva, Dept Phys Theor, CH-1211 Geneva 4, Switzerland. J Kepler Astron Ctr, PL-65265 Zielona Gora, Poland. Nicholas Copernicus Astron Ctr, PL-00716 Warsaw, Poland. INAOE, Puebla 7200, Mexico. CSIC, IEEC, Inst Estudis Espacials Catalunya, Barcelona 08034, Spain TI - The transition to nonlinearity and new constraints on biasing AB - We present two new dynamical tests of the biasing hypothesis. The first is based on the amplitude and the shape of the galaxy-galaxy correlation function, xi (g)(r), where r is the separation of the galaxy pair. The second test uses the mean relative peculiar velocity for galaxy pairs, nu (12)(r). This quantity is a measure of the rate of growth of clustering and it is related to the two-point correlation function for the matter density fluctuations, xi (r). Under the assumption that galaxies trace the mass (xi (g) = xi), the expected relative velocity can be calculated directly from the observed galaxy clustering. The above assumption can be tested by confronting the expected nu (12) with direct measurements from velocity-distance surveys. Both our methods are checked against N-body experiments and then compared with the xi (g)(r) and nu (12) estimated from the APM galaxy survey and the Mark III catalogue, respectively. Our results suggest that cosmological density parameter is low, Omega (m) approximate to 0.3, and that the APM galaxies trace the mass at separations r greater than or equal to 5 h(-1), where h is the Hubble constant in units of 100 kin s(-1) Mpc. The present results agree with earlier studies, based on comparing higher-order correlations in the APM with weakly nonlinear perturbation theory. Both approaches constrain the linear bias factor to be within 20% of unity. If the existence of the feature we Identified in the APM xi (g)(r) - the inflection point near xi (g) = 1 - Is confirmed by more accurate surveys, we may have discovered gravity's smoking gun: the long awaited "shoulder" in xi, generated by gravitational dynamics and predicted by Gott and Rees 25 years ago MH - Mexico|Puebla MH - Poland MH - Spain MH - Switzerland T3 - ONSET OF NONLINEARITY IN COSMOLOGYAnnals of the new york academy of sciences PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - S;Article NT - SEnglishArticle02 EAST 63RD ST, NEW YORK, NY 10021 USAANN N Y ACAD SCIBT10S AV - English IS - 0077-8923 UR - ISI:000171969300003 L2 - cosmology : theory, observation;peculiar velocities : large-scale flows SO - 2001 ;English():24-42 3308 UI - 13704 AU - Kachouane A AU - Addou M AU - Bougrine A AU - El idrissi B AU - Messoussi R AU - Regragui M AU - Bernede JC AD - Univ Ibn Tofail, Lab Optoelect & Phys Chim Mat, Fac Sci, Dept Phys, Mexico City 14000, DF, MexicoUniv Nantes, FSTN, Grp Couches Minces & Mat Nouveaux, Equipe Phys Solides Elect, F-44322 Nantes 3, FranceKachouane, A, Univ Ibn Tofail, Lab Optoelect & Phys Chim Mat, Fac Sci, Dept Phys, BP 133, Mexico City 14000, DF, Mexico TI - Preparation and characterisation of tin-doped indium oxide films AB - Tin-doped In2O3 (ITO) thin films were prepared by reactive evaporation from new pulverulent mixture of indium oxide, tin oxide and metallic indium at different partial pressures of oxygen. The films were annealed in a secondary vacuum just after deposition. Under optimal conditions of evaporation, these films are stoichiometric, show a good crystallinity and feature high transmission in visible region (T > 90%) and high reflection in near IR region versus oxygen pressure. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000168602000005 L2 - thin films;ITO;transmission;XPS;THIN-FILMS; OPTICAL-PROPERTIES SO - Materials Chemistry and Physics 2001 ;70(3):285-289 3309 UI - 13612 AU - Kaczmarek M AU - Cudney RS AU - Eason RW AD - Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandCICESE, Dept Fis Aplicada, Ensenada 22880, Baja California, MexicoUniv Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, EnglandKaczmarek, M, Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England TI - Amplification of near-infrared light in a photorefractive ring resonator AB - We have demonstrated efficient amplification of near-infrared, 0.83-mum and 1.06-mum light, in a photorefractive ring resonator using Rh:BaTiO3. The optical power oscillating inside the ring exceeded the pump power by a factor of up to 2.34. The sensitivity of a ring resonator to nanometer changes in its length was characterised using a piezo-mirror MH - United Kingdom MH - Mexico|Baja California PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 0946-2171 UR - ISI:000168933700025 L2 - OSCILLATOR; DYNAMICS; FREQUENCY; LENGTH SO - Applied Physics B-Lasers and Optics 2001 ;72(6):781-784 3310 UI - 13726 AU - Kaitala A AU - Hardling R AU - Katvala M AU - Ordonez RM AU - Miettinen M AD - Univ Oulu, Dept Biol, FIN-90014 Oulu, FinlandUniv Lund, Dept Theoret Ecol, S-22362 Lund, SwedenInst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoUniv Stockholm, Dept Zool, S-10691 Stockholm, SwedenKaitala, A, Univ Oulu, Dept Biol, Box 3000, FIN-90014 Oulu, Finland TI - Is nonparental egg carrying parental care? MH - Finland MH - Mexico|Veracruz MH - Sweden PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 12 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Editorial Material AV - English IS - 1045-2249 UR - ISI:000168710200020 L2 - COREID BUG; HETEROPTERA; PREDATION SO - Behavioral Ecology 2001 ;12(3):367-368 3311 UI - 14010 AU - Kakazey M AU - Ivanova N AU - Sokolsky G AU - Gonzalez-Rodriguez JG AD - NASU, Inst Mat Sci Problems, Kyiv, UkraineUniv Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca, Morelos, MexicoNASU, Inst Gen & Inorgan Chem, Kyiv, UkraineKakazey, M, NASU, Inst Mat Sci Problems, Kyiv, Ukraine TI - Electron paramagnetic resonance of MnO2 powders AB - A study was made of the electron paramagnetic resonance (EPR) in electrolytically and chemically prepared manganese dioxides intended for use in power sources. A typical EPR signal for the powdered MnO2 samples is wide single line with g = 1.94. The replacement of some Mn4+ ions by Mn3+ modified the character of the exchange interaction. A correlation was established between the width of the EPR signal and the ionic conductivity value as well as Mn3+/Mn4+ ratio and OH- groups contents in the samples. It is supposed that the EPR data can be useful for the semiquantitative expression of chemical and electrochemical activity of different MnO2 samples. In some samples EPR signals with g = 2.000, A = 8.81 mT (A is hyperfine structure parameter) were revealed due to the presence of MnSO4 water solutions traces. (C) 2001 The Electrochemical Society. All rights reserved MH - Mexico|Morelos MH - Ukraine PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 2 U4 - Electrochemistry;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1099-0062 UR - ISI:000167877200015 L2 - MANGANESE-DIOXIDE SO - Electrochemical and Solid State Letters 2001 ;4(5):J1-J4 3312 UI - 13376 AU - Kakazey MG AU - Kakazei GN AU - Gonzalez-Rodriguez JG AD - Natl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, UkraineNatl Acad Sci Ukraine, Inst Magnetism, Kiev, UkraineCtr Invest Ingn & Ciencias Aplicadas, Cuernavaca, Morelos, MexicoKakazey, MG, Natl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, Ukraine TI - Mechanothermal effects on the defect structure in ZnO powders subjected to hydrostatic pressure AB - Using electron paramagnetic resonance (EPR) spectroscopy method the mechanism of defect formation has been studied in ZnO powders, put to a bottoming (a hydrostatic pressing) up to P=8 GPa. The initiation of 6 paramagnetic centers by a pressing has been shown (V-Zn(-):Zn-i(O) -I, V-Zn(-) -II, (V-Zn(-))(2)(-) -III, V-O(+) -IV, SDS (shallow donor states) - V and SDSimp (SDS associated with impurities) - VI). The dependence of the signal intensity (I) on pressure P has been studied. The maxima on curves I =f (P) for EPR signals from centres I and II are attributed to the development of mechanothermal processes promoting an annealing of the created defects during pressing. Comparison with the data on annealing of paramagnetic centers has allowed to construct the dependence of an average sample temperature as a function of hydrostatic pressure, and to propose the model diagram of the development of mechanothermal processes under pressure MH - Mexico|Morelos MH - Ukraine PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Crystallography U5 - J;Article AV - English IS - 0232-1300 UR - ISI:000169608200010 L2 - defects;pressing;deformation;fracture;zinc-oxide;powders;mechanothermal processes;EPR;TRIBOPHYSICAL ACTIVATION; ZINC-OXIDE; EVOLUTION SO - Crystal Research and Technology 2001 ;36(4-5):429-439 3313 UI - 13416 AU - Kalnins EG AU - Kress JM AU - Pogosyan GS AU - Miller W AD - Univ Waikato, Dept Math, Hamilton, New ZealandUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Minnesota, Sch Math, Minneapolis, MN 55455, USAJoint Inst Nucl Res Dubna, Theoret Phys Lab, Dubna 14980, Moscow Region, RussiaKalnins, EG, Univ Waikato, Dept Math, Hamilton, New Zealand TI - Completeness of superintegrability in two-dimensional constant-curvature spaces AB - We classify the Hamiltonians H = p(x)(2) + p(y)(2) + V(x, y) of all classical superintegrable systems in two-dimensional complex Euclidean space with two additional second-order constants of the motion. We similarly classify the superintegrable Hamiltonians H = J(1)(2) + J(2)(2) + J(3)(2) + V(x, y, z) on the complex two-sphere where x(2) + y(2) + z(2) = 1. This is achieved in all generality using properties of the complex Euclidean group and the complex orthogonal group MH - Mexico|Morelos MH - New Zealand MH - Russia MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 41 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000169462100014 L2 - MULTISEPARABLE SUPERINTEGRABILITY; SYSTEM SO - Journal of Physics A-Mathematical and General 2001 ;34(22):4705-4720 3314 UI - 12549 AU - Kamar M AU - Azadi P AU - varez-Manilla G AU - Pierce M AD - Univ Georgia, Complex Carbohydrate Res Ctr, Athens, GA 30602, USAUniv Georgia, Dept Biochem & Mol Biol, Athens, GA, USACIAD Ensenada, Ensenada, Baja California, Mexico TI - Studies on the structural characterization of GnT-V MH - Mexico|Baja California MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 0959-6658 UR - ISI:000171457800168 SO - Glycobiology 2001 ;11(10):916-916 3315 UI - 12825 AU - Kanaun SK AU - Jeulin D AD - Ecole Mines Paris, Ctr Morphol Math, F-77305 Fontainebleau, FranceCEM, Dept Engn & Architecture, Inst Tecnol & Estudios Super Monterrey, Atizapan 52929, Edo Mexico, MexicoJeulin, D, Ecole Mines Paris, Ctr Morphol Math, 35 Rue St Honore, F-77305 Fontainebleau, France TI - Elastic properties of hybrid composites by the effective field approach AB - The work is dedicated to the calculation of the overall elastic properties of matrix composite materials containing two different populations of inclusions (three phase hybrid composites). The application of the well known Mori-Tanaka method or self-consistent effective medium method to the solution of this problem gives overall elastic moduli tensors of such composites that do not have the necessary symmetry (the symmetry with respect to the first and second pairs of indices). in this work, a new version of the effective field method that takes into account specific features of the microstructure of three phase composites is developed. In this version, the field that acts on every inclusion in the composite is assumed to be different for inclusions of different populations. It is shown that the modified effective field method gives a correct symmetry of the overall elastic moduli tensors of three phase composites. The method allows us to describe the influence of the peculiarities in spatial distributions of inclusions on the overall elastic constants. The cases of media containing infinite cylindrical fibers and thin ellipsoidal disks or spherical pores are considered. Various boolean type probabilistic models of random sets of such inclusions are proposed and the elastic moduli tensors of the corresponding three phase composites are obtained and analyzed. It turns out that these tensors strongly depend on statistical properties of the random fields of inclusions. It is shown that for two phase composites, the Mori Tanaka method is a particular case of the effective field method. In the case of three phase composites, the formulas of the Mori-Tanaka method follow from the equations of the effective field method if a general property of the symmetry of cross-correlation functions of different populations of inclusions is violated, As a result, the overall elastic moduli tensors obtained by Mori-Tanaka method lose their natural symmetry. (C) 2001 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary;Mechanics;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-5096 UR - ISI:000171097100004 L2 - matrix composites;inclusions;hybrid structures;elastic properties;statistical models;MEDIA SO - Journal of the Mechanics and Physics of Solids 2001 ;49(10):2339-2367 3316 UI - 12747 AU - Kaplan IG AU - Roszak S AU - Leszczynski J AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoJackson State Univ, Dept Chem, Computat Ctr Mol Struct & Interact, Jackson, MS 39217, USAWroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, PolandKaplan, IG, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Binding in clusters with closed-subshell atoms (alkaline-earth elements) MH - Mexico|Distrito Federal MH - Poland MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - S;Review AV - English IS - 0065-3276 UR - ISI:000171374600014 L2 - SMALL METAL-CLUSTERS; SMALL BERYLLIUM CLUSTERS; ELECTRON CORRELATION; CORRELATION ENERGIES; PERTURBATION-THEORY; DENSITY; MODEL; EXPANSIONS; POTENTIALS; MOLECULES SO - Advances in Quantum Chemistry, Vol 40: New Perspectives in Quantum Systems in Chemistry and Physics, Pt 2 2001 ;40():257-278 3317 UI - 13042 AU - Karapetyants AN AU - Nogin VA AD - IPN, CINVESTAV, Ctr Res Adv Study, Mexico City, DF, MexicoRostov State Univ, Dept Math, Rostov Na Donu, RussiaKarapetyants, AN, IPN, CINVESTAV, Ctr Res Adv Study, Mexico City, DF, Mexico TI - On L characteristic of some potential type operators with oscillating symbols and singularities of the kernels on a sphere AB - For the operator A(alpha) with symbol /xi/(-alpha)e(i/xi/), n-1/2 < alpha < n the description of the set of pairs (1/p, 1/q) for which it is bounded from Lp into Lq is given. As an application, the operators with symbols where w( ') is a homogeneous function of degree zero, gamma > 0, are also considered MH - Mexico|Distrito Federal MH - Russia PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0236-5294 UR - ISI:000170540700001 L2 - potential type operators;Fourier analysis SO - Acta Mathematica Hungarica 2001 ;92(1-2):1-9 3318 UI - 12600 AU - Karlovich YI AU - Lebre AB AD - Inst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoIst Super Tecn, Dept Matemat, P-1049001 Lisbon, PortugalKarlovich, YI, Inst Politecn Nacl, CINVESTAV, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Algebra of singular integral operators with a Carleman backward slowly oscillating shift AB - In this paper we study the Banach algebra of singular integral operators with piecewise continuous coefficients and a Carleman orientation-reversing slowly oscillating shift on the Lebesgue space with a power weight on the unit circle. The slow oscillation of the shift derivative, in contrast to the classic assumption on its piecewise continuity, leads to the appearance of massive local spectra for the considered operators. Applying localization techniques and the theory of Mellin pseudodifferential and associated limit operators, we construct a symbol calculus for the above-mentioned operator algebra and find a Fredholm criterion and an index formula for the operators in this algebra in terms of their symbols MH - Mexico|Distrito Federal MH - Portugal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000171694000003 L2 - PSEUDODIFFERENTIAL-OPERATORS; SYMBOLS; THEOREMS; FREDHOLM; CONTOURS; SPECTRA; WEIGHTS; SPACES SO - Integral Equations and Operator Theory 2001 ;41(3):288-323 3319 UI - 12939 AU - Katime I AU - Arellano J AU - Mendizabal E AU - Puig J AD - Univ Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, E-48080 Bilbao, SpainUniv Guadalajara, CUCEI, Dept Quim, Guadalajara 44430, Jalisco, MexicoKatime, I, Univ Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, Campus Lejona,Apartado 644, E-48080 Bilbao, Spain TI - Synthesis and characterization of poly(n-hexyl methacrylate) in three-component microemulsions AB - The polymerization of n-hexyl methacrylate in three-component microemulsions stabilized with dodecyltrimethylammonium bromide is examined here as a function of the concentration of a water-soluble (V-50) and an oil-soluble (2,2-azobisisobutyronitrile) initiators, of monomer concentration in the parent microemulsions and temperature. At high temperatures and high initiator concentrations, only two reaction rate intervals are observed; however, at low temperatures and low initiator concentrations, a slow rate period is observed whose duration increases as the temperature or the initiator concentration diminish. This slow rate period appears to be due to homogeneous nucleation. Particle size of polymer particles is small and remains constant throughout the reaction. Molar mass is high and also remains constant throughout the reaction. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Jalisco MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000170883000016 L2 - microemulsion;polymerization;poly(n-hexyl methacrylate);particle size;quasielastic light scattering;3-COMPONENT CATIONIC MICROEMULSIONS; IN-WATER MICROEMULSIONS; METHYL-METHACRYLATE; RADICAL POLYMERIZATION; STYRENE POLYMERIZATION; VINYL-ACETATE; TETRAHYDROFURFURYL METHACRYLATE; ANIONIC MICROEMULSIONS; PARTICLE NUCLEATION; RAMAN-SPECTROSCOPY SO - European Polymer Journal 2001 ;37(11):2273-2279 3320 UI - 14115 AU - Kaufer-Horwitz M AU - Valdes-Ramos R AU - Bermudez OI AU - Anderson AS AU - Willett WC AU - Solomons NW AD - Inst Nacl Perinatol, Mexico City 11000, DF, MexicoTufts Univ, USDA, Human Nutr Res Ctr Aging, Boston, MA 02111, USAUniv Dundee, Dundee, ScotlandHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USACtr Studies Sensory Impairment Aging & Metab, Guatemala City, Guatemala TI - A diamond is a pyramid turned upside down: Comparative messages and assumptions of dietary guideline emblems worldwide MH - Guatemala MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103577 SO - Faseb Journal 2001 ;15(4):A624-A624 3321 UI - 12811 AU - Kazmi WH AU - Kausz AT AU - Khan S AU - Abichandani R AU - Ruthazer R AU - Obrador GT AU - Pereira BJG AD - Tufts Univ New England Med Ctr, Dept Med, Div Nephrol, Boston, MA 02111, USATufts Univ New England Med Ctr, Dept Med, Div Clin Care Res, Boston, MA 02111, USAPanamericana Univ, Sch Med, Mexico City, DF, MexicoPereira, BJG, Tufts Univ New England Med Ctr, Dept Med, Div Nephrol, Box 5224,750 Washington St, Boston, MA 02111 USA TI - Anemia: An early complication of chronic renal insufficiency AB - The strong association between anemia and cardiovascular complications among patients with end-stage renal disease suggests that anemia during chronic renal insufficiency (CRI) may also have important consequences. We performed a retrospective cohort study to identify factors associated with severe anemia (hematocrit [Hct] < 30%) and examine anemia management practices in CRI. The CRI cohort was composed of 604 adult patients with elevated serum creatinine levels. There was a direct correlation between predicted glomerular filtration rate and Hct (r = 0.49) and an inverse correlation between serum creatinine level and Hct (r = -0.37). Anemia was noted early in CRI; 45% of patients with serum creatinine levels of 2 mg/dL or less had an Hct less than 36%, and 8% had an Hct less than 30%. During the course of the study, mean Hct decreased from 35.1% +/- 5.6% to 31.8% +/- 5.6%. Iron studies were obtained in only 19% of patients, and among these, the prevalence of iron deficiency (transferrin saturation < 20%) was 54%. Only 30% and 26% of patients were administered recombinant human erythropoietin (rHuEPO) and iron, respectively. Multivariate analyses showed that diabetes as the cause of renal disease, greater serum creatinine level, and having a single nephrology visit were associated with greater odds for the presence of anemia. A lower Hct and having a single nephrology visit were associated with greater odds for rHuEPO use. These results show that anemia begins early in the course of CRI, and management of anemia is suboptimal, even among patients under the care of nephrologists. Educational programs to optimize anemia management among patients with CRI are needed. <(c)> 2001 by the National Kidney Foundation, Inc MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 59 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0272-6386 UR - ISI:000171226600011 L2 - anemia;chronic renal insufficiency (CRI);recombinant human erythropoietin (rHuEPO);hematocrit (Hct);glomerular filtration rate (GFR);RECOMBINANT-HUMAN-ERYTHROPOIETIN; LEFT-VENTRICULAR HYPERTROPHY; PREDIALYSIS PATIENTS; HEMODIALYSIS-PATIENTS; DIALYSIS PATIENTS; HEMATOCRIT LEVEL; FAILURE; DISEASE; THERAPY; SURVIVAL SO - American Journal of Kidney Diseases 2001 ;38(4):803-812 3322 UI - 13910 AU - Keerthisingam CB AU - Jenkins RG AU - Harrison NK AU - Hernandez-Rodriguez NA AU - Booth H AU - Laurent GJ AU - Hart SL AU - Foster ML AU - McAnulty RJ AD - Royal Free & Univ Coll, Sch Med, Rayne Inst, Ctr Cardiopulm Biochem & Resp Med, London WC1E 6JJ, EnglandMorriston Hosp, Resp Unit, Swansea, W Glam, WalesNatl Canc Inst, Div Clin Invest, Mexico City, DF, MexicoInst Child Hlth, Mol Immunol Unit, London, EnglandAventis Pharmaceut, Discovery Biol, Dagenham, EnglandMcAnulty, RJ, Royal Free & Univ Coll, Sch Med, Rayne Inst, Ctr Cardiopulm Biochem & Resp Med, 5 Univ St, London WC1E 6JJ, England TI - Cyclooxygenase-2 deficiency results in a loss of the anti-proliferative response to transforming growth factor-beta in human fibrotic lung fibroblasts and promotes bleomycin-induced pulmonary fibrosis in mice AB - Prostaglandin E-2 (PGE(2)) inhibits fibroblast proliferation and collagen production. Its synthesis by fibroblasts is induced by profibrotic mediators including transforming growth factor (TGF)-beta (1). However, in patients with pulmonary fibrosis, PGE(2) levels are decreased. In this study we examined the effect of TGF-beta (1) on PGE(2) synthesis, proliferation, collagen production, and cyclooxygenase (COX) mRNA levels in fibroblasts derived from fibrotic and nonfibrotic human lung. In addition, we examined the effect of bleomycin-induced pulmonary fibrosis in COX-2-deficient mice. We demonstrate that basal and TGF-beta (1)-induced PGE(2) synthesis is limited in fibroblasts from fibrotic lung. Functionally, this correlates with a loss of the anti-proliferative response to TGF-beta (1). This failure to induce PGE(2) synthesis Is because of an inability to up-regulate COX-2 mRNA levels in these fibroblasts, Furthermore, mice deficient in COX-2 exhibit an enhanced response to bleomycin, We conclude that a decreased capacity to up-regulate COX-2 expression and COX-2-derived PGE(2) synthesis in the presence of increasing levels of profibrotic mediators such as TGF-beta (1) may lead to unopposed fibroblast proliferation and collagen synthesis and contribute to the pathogenesis of pulmonary fibrosis MH - United Kingdom MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC INVESTIGATIVE PATHOLOGY, INC RP - NOT IN FILE U3 - TC 79 U4 - Pathology U5 - J;Article AV - English IS - 0002-9440 UR - ISI:000168134000027 L2 - BRONCHOALVEOLAR LAVAGE FLUID; NECROSIS-FACTOR-ALPHA; SMOOTH-MUSCLE CELLS; MESSENGER-RNA; PROCOLLAGEN PRODUCTION; COLLAGEN PRODUCTION; PROSTAGLANDIN E(2); INTERFERON-GAMMA; GENE-TRANSFER; EXPRESSION SO - American Journal of Pathology 2001 ;158(4):1411-1422 3323 UI - 12339 AU - Kelly CK AU - Smith HB AU - Buckley YM AU - Carter R AU - Franco M AU - Johnson W AU - Jones T AU - May B AU - Ishiwara RP AU - Perez-Jimenez A AU - Magallanes AS AU - Steers H AU - Waterman C AD - Univ Oxford, Dept Zool, Oxford OX1 3PS, EnglandUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Biol, Ascot SL5 7PY, Berks, EnglandUniv Nacl Autonoma Mexico, Dept Bot, Mexico City 04510, DF, MexicoCtr Univ Costa Sur Autlan, IMECBIO, Autlan De Navarro, Jalisco, MexicoKelly, CK, Univ Southampton, Sch Biol Sci, Div Biodivers & Ecol, Southampton SO16 7PX, Hants, England TI - Investigations in commonness and rarity: a comparative analysis of co-occurring, congeneric Mexican trees AB - Population size distributions were examined for 12 species of trees co-occurring at Chamela Biological Station in Jalisco, Mexico. Species had been selected as congeneric pairs and trios similar in gross morphology and ecology in order better to identify correlates of relative abundance. Rarer species were found unanimously to have more irregular distributions of individuals among size classes than more common species when distributions were compared to a smooth, descending curve constructed from population mean stem diameters (an exponential distribution). Examination among species of patterns of deviation from these corresponding smooth distributions indicates that the most reasonably inferred cause for the observed pattern is consistent differences in degree of fluctuation in recruitment into adult size classes. These results thereby suggest a demographic difference between locally rarer and more common species that may be generally associated with observed differences in relative abundance and indicate a focus for management of rarity in forest trees MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Ecology U5 - J;Article AV - English IS - 1461-023X UR - ISI:000172341500015 L2 - rare plants;size distributions;congeneric comparisons;independent contrasts;recruitment fluctuation;species coexistence;biodiversity;storage dynamics;TROPICAL DECIDUOUS FOREST; PLANT RANGE SIZE; POPULATION-DYNAMICS; COEXISTENCE; PHYLOGENIES; DIVERSITY; RARE; ENVIRONMENTS; CONSEQUENCES; VARIABILITY SO - Ecology Letters 2001 ;4(6):618-627 3324 UI - 13143 AU - Kelly CK AU - Harris D AU - Perez-Ishiwara R AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv N Texas, Dept Biol Sci, Denton, TX 76203, USAKelly, CK, Univ Southampton, Sch Biol Sci, Bassett Crescent E, Southampton SO16 7PX, Hants, England TI - Is breaking up hard to do? Breakage, growth, and survival in the parasitic clonal plant Cuscuta corymbosa (Convolvulaceae) AB - In a tripartite exploration of the effects of traumatic breakage in the parasitic clonal plant Cuscuta corymbosa, experimental breakage had significant negative effects upon stem extension of ramets distal to a break and the level of that effect depended upon the number of ramets in the severed fragment. Regular monitoring of clonal individuals transplanted onto naturally occurring, native host species revealed that breakage in individuals growing under natural conditions ranged from 2 to 66% of all interramet connections and significantly affected distance between ramets and stolon generation in ramets associated with a break. Simulations revealed that these responses to breakage would significantly change the "shape" of a clonal individual in a manner capable of affecting probabilities of encounter with patchily distributed resources. Nonetheless, the observed levels of breakage had no discernible effect on biomass accumulation, although individuals that survived into the dry season and thus gained the potential to reproduce in additional seasons had a significantly lower rate of breakage than those that did not. We suggest that the lack of a relationship between breakage and within-season biomass accumulation is an indication that parasite response to breakage is gauged to expected levels of breakage for the habitat. We note that the capacity of ramets to survive disconnection significantly decreased the loss of tissue that would occur if subunits did not possess the potential to function independently MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000170368900014 L2 - Chamela Biological Station;clonal integration;clonal plants;Convolvulaceae;Cuscuta;parasitic plants;PHYSIOLOGICAL INTEGRATION; FRAGARIA-CHILOENSIS; ARCHITECTURE; SIMULATION; ACQUISITION; COMMONNESS; ABUNDANCE; EUROPAEA; PATTERNS; BIOLOGY SO - American Journal of Botany 2001 ;88(8):1458-1468 3325 UI - 14075 AU - Kelly LM AD - Cornell Univ, L H Bailey Hortorium, Mann Lib 462, Ithaca, NY 14853, USAKelly, LM, Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Apartado Postal 70-233, Mexico City 04510, DF, Mexico TI - Taxonomy of Asarum section Asarum (Aristolochiaceae) AB - Asarum sect. Asarum is a monophyletic group of 14 species distributed through North America, Europe, and Asia. The section is here treated in a taxonomic monograph based on morphological study of field-collected material and herbarium specimens. A key, descriptions, distribution maps, and citations of representative specimens are provided, and available information is reviewed on the pollination biology and phylogenetic relationships within the group. Six species of sect. Asarum are recognized in North America: A. canadense is widespread in the east, and the others range from widespread to narrow endemics in the west. Asarum canadense, which has at times been divided into several species or infraspecific taxa, is here recognized as a single species based on a lack of reliable differences among the variants. Asarum europaeum, which is the most widespread species in the section, has been similarly spit historically, but also is treated here as a single taxon. In Asia, section Asarum consists of seven species from the eastern Himalayas through southeastern China, with two also extending into Japan MH - Mexico|Distrito Federal MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Evolutionary Biology U5 - J;Review AV - English IS - 0363-6445 UR - ISI:000167537500003 L2 - NORTHERN HEMISPHERE; EVOLUTION; TERTIARY SO - Systematic Botany 2001 ;26(1):17-53 3326 UI - 13145 AU - Kelter PB AU - Castro-Acuna CM AU - Dominguez-Danache RE AD - Univ N Carolina, Dept Chem, Greensboro, NC 27402, USAUniv Nacl Autonoma Mexico, Dept Fisicoquim, Mexico City 04510, DF, Mexico TI - One philosophy in two countries: Common ground, common programs between long-time friends MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824701097 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U124-U125 3327 UI - 12910 AU - Kemp SN AU - Chan SJ AU - Beckman JE AU - Hammersley PL AD - Inst Astrofis Canarias, E-38200 La Laguna, Tenerife, SpainUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandKemp, SN, Inst Astron & Meteorol, Av Vallarta 2602,Col Arcos Vallarta, Guadalajara 44130, Jalisco, Mexico TI - Infrared imaging of perpendicular nested bars in spiral galaxies with the infrared camera at the Carlos Sanchez telescope AB - Images are presented of some of the galaxies in the sample of the BARS `International Time Project' in the near-infrared J H K-s bands, obtained with the Infra-Red Camera at the 1.5 m Carlos Sanchez Telescope, Teide Observatory, between 1996 and 1998. We discuss the scientific importance of imaging galaxies in the near-infrared bands and recent and future developments concerning the Infra-Red Camera MH - United Kingdom MH - Mexico|Jalisco MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000170945400042 L2 - PHOTOMETRY SO - Astrophysics and Space Science 2001 ;276(2-4):675-682 3328 UI - 12273 AU - Keppie JD AU - Dostal J AU - Ortega-Gutierrez F AU - Lopez R AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaUniv Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064, USAKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - A Grenvillian arc on the margin of Amazonia: evidence from the southern Oaxacan Complex, southern Mexico AB - The rocks in the southern Oaxacan Complex of Mexico form part of the basement of Oaxaquia, a terrane that underlies most of eastern Mexico. They have undergone granulite facies metamorphism at similar to 1 Ga, that was initially overprinted by lower amphibolite facies metamorphism accompanied by extensive hydration, and then by greenschist facies metamorphism. Geochemical data indicate that protoliths include volcanic arc lavas and sediments intruded by a rift-related granite. The metavolcanic rocks have SiO2 ranging between 55 and 72%, are typically enriched in highly incompatible elements such as Ba, Rb and light rare earth elements, and are accompanied by relative depletion of Nb and Ti characteristic of subduction-related magmas. The granite has SiO2 ranging between 67 and 70%, is enriched in strongly incompatible elements, and depleted in Nb and Ti indicative of either a crustal source or a subduction-related tectonic setting. Concordant, U-Pb analyses of single zircons from this granite yield an age of 1117 +/- 4 and 988 +/- 5 Ma interpreted as the age of intrusion and the time of peak granulite facies metamorphism, respectively. Combined with published information from other parts of Mexico, these data indicate that Oaxaquia was a juvenile arc metamorphosed during a relatively young Grenvillian metamorphism at 990 Ma. Similar characteristics may also be found in the Andean massifs of Colombia and in the Appalachian terranes (Carolina-Piedmont and Avalon) of Amazonian provenance. This suggests that Oaxaquia may also have lain adjacent to northwestern Amazonia at similar to 1 Ga, a location that may allow Neoproterozoic subduction as the origin of the hydrous, lower amphibolite facies metamorphism. It would also provide a proximal source for low grade to unmetamorphosed similar to 1 Ga and Neoproterozoic igneous boulders in northern Oaxaquia and 1000-900 Ma detrital zircons in Neoproterozoic and Paleozoic, sedimentary rocks in Avalonia and Iberia. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 28 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0301-9268 UR - ISI:000172497100001 L2 - Neoproterozoic;Mexico;calc-alkaline volcanics;rift magma;tectonics;CAPE-BRETON ISLAND; LAURENTIA-GONDWANA LINK; U-PB GEOCHRONOLOGY; NOVA-SCOTIA; TECTONIC INTERPRETATION; GRANITIC-ROCKS; CANADA; CONSTRAINTS; ORIGIN; TERRANE SO - Precambrian Research 2001 ;112(3-4):165-181 3329 UI - 12309 AU - Keppie JD AU - Dostal J AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Evaluation of the Baja controversy using paleomagnetic and faunal data, plume magmatism, and piercing points AB - The controversy over Late Cretaceous locations of Baja Alaska, Baja BC, Stikinia and western Quesnellia centres around whether (a) they were within 1000 km of their present positions, or (b) located 1000-5000 kin south along the western coast of Laurentia to be transported northwards by the Kula plate during the Late Cretaceous and Cenozoic. The latter is supported by paleomagnetic data (including data that pass a fold, contact or reversal test) whereas the former is based upon correlation of strata across faults. Although various critical tests have been proposed and tried, interpretations are equivocal, e.g. alternative interpretations for the source of detrital zircons in Baja BC. We propose that the presence of plume magmatism provides unique vertical piercing points. Thus', correlation of the 70 Ma plume magmatism in northern Stikinia with the Yellowstone hotspot locates Stikinia similar to 2000 km to the south and similar to 1000 km off the western coast of Laurentia. On the other hand, the absence of 90-70 Ma Yellowstone plume magmatism in the presently adjacent Baja BC, but the presence of 60-47 Ma Yellowstone plume/ spreading ridge magmatism in southern Baja BC (southern Vancouver Island and Coast Ranges of Washington and Oregon) implies that it moved at least 1200 km northwards between 70 and 60 Ma (i.e. a rate of greater than or equal to 12 cm/year): the spreading ridge may be correlated with the Kula-Farallon ridge. Furthermore, the presence of middle-late Triassic plume magmatism in Wrangellia and the Peninsula and Alexander terranes suggests similar to 2000 km of relative dextral movement between Baja Alaska and Baja BC. Applying these conclusions to pre-90 Ma paths of Baja Alaska/BC across the Pacific ocean suggests that it had three components: (1) northeasterly between 230 and 180 Ma; (2) eastsoutheasterly between 180 and 140 Ma, and (3) northeasterly between 140 and 90 Ma. Whereas the latter component is consistent with published terrane tracks, the 180-140 Ma component is at odds suggesting that this latter segment be reassessed. The weight of evidence in favour of correlating geological piercing points across the Gulf of California appears to outweigh paleomagnetic evidence for 1000-2500 km of apparent northward displacement of Baja California in the Cretaceous and early Tertiary, which may be explained by similar to 15-20 degrees tilting of fault blocks recorded by Ar-40/Ar-39 cooling ages. Thus, we conclude that whereas Baja Alaska, Baja BC, Stikina and western Quesnellia were transported between 1000 and 5000 km northwards along the western margin of Laurentia during the Late Cretaceous and Cenozoic, Baja California has not moved more than that required to open the Gulf of California. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000172286200009 L2 - Baja British Columbia;paleomagnetism;plume magmatism;faunal provinces;piercing points;terrane tracks;SOUTHWESTERN BRITISH-COLUMBIA; WRANGELLIA FLOOD-BASALT; UPPER CRETACEOUS STRATA; COAST PLUTONIC COMPLEX; CANADIAN CORDILLERA; NORTH-AMERICA; SOUTHEASTERN ALASKA; TECTONIC EVOLUTION; INITIATION MODEL; VANCOUVER-ISLAND SO - Tectonophysics 2001 ;339(3-4):427-442 3330 UI - 12450 AU - Kessler RC AU - guilar-Gaxiola S AU - Berglund PA AU - Caraveo-Anduaga JJ AU - Dewit DJ AU - Greenfield SF AU - Kolody B AU - Olfson M AU - Vega WA AD - Harvard Univ, Sch Med, Dept Hlth Care Policy, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Psychiat, Boston, MA 02115, USACalif State Univ Fresno, Sch Nat Sci, Dept Psychol, Fresno, CA 93740, USAUniv Michigan, Inst Social Res, Ann Arbor, MI 48109, USAInst Mexicano Psiquiatria, Huipulco, MexicoAddict Res Fdn, Clin Social & Evaluat Res Dept, London, ON, CanadaMcLean Hosp, Belmont, MA 02178, USAUniv San Diego, Dept Sociol, San Diego, CA 92110, USAColumbia Univ, Coll Phys & Surg, Dept Psychiat, New York, NY, USAUniv Med & Dent New Jersey, Robert Wood Johnson Med Sch, Inst Qual Res & Training, New Brunswick, NJ, USAKessler, RC, Harvard Univ, Sch Med, Dept Hlth Care Policy, 180 Longwood Ave, Boston, MA 02115 USA TI - Patterns and predictors of treatment seeking after onset of a substance use disorder AB - Background: We studied survey respondents aged 18 through 54 years to determine consistent predictors of treatment seeking after onset of a DSM-III-R substance use disorder. Methods: Survey populations included a regional sample in Ontario (n=6261), a national sample in the United States (n=5388), and local samples in Fresno, Calif (n=2874) and Mexico City,Mexico (n=1734)The analysis examined the effects of demographics, symptoms, and types of substances on treatment seeking. Results: Between 50% (Ontario) and 85% (Fresno) of people with substance use disorders seek treatment but the time lag between onset and treatment seeking aver ages a decade or more. Consistent predictors of treatment seeking include: (1) late onset of disorder (odds ratio [OR], 3.8; 95% confidence interval [Cl] 2.6-5.6 for late [greater than or equal to 30 years] vs earl), [1-15 years] age at first symptom of disorder); (2) recency of cohort (OR, 3.4; 95% Cl, 2.3-5.0 for most recent [aged 15-24 years at interview] vs earliest [aged 45 years] cohorts); (3) 4 specific dependence symptoms (using larger amounts than intended, unsuccessful attempts to cut down use, tolerance, and withdrawal symptoms), with ORs ranging between 1.6 (95% Cl, 1.3-2.0) and 2.7 (95% Cl, 2.1-3.6) for people with vs without these Symptoms; and (4) use vs nonuse of cocaine (OR, 2.1 95% Cl, 1.6-2.7) and heroin (OR, 2.6; 95% Cl, 1.1-6.0). Conclusions: Although most people with substance use disorders eventually seek treatment, treatment seeking often occurs a decade or more after the onset of symptoms of disorder. While treatment seeking has increased in recent years, it is not clear whether this is because of increased access, increased demand, increased societal pressures, or other factors MH - Canada MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 29 U4 - Psychiatry U5 - J;Article AV - English IS - 0003-990X UR - ISI:000172056100010 L2 - NATIONAL-COMORBIDITY-SURVEY; R PSYCHIATRIC-DISORDERS; HELP-SEEKING; MENTAL-HEALTH; PROBLEM DRINKERS; DRUG-USERS; TREATMENT CONTACT; UNITED-STATES; ALCOHOL; RECOVERY SO - Archives of General Psychiatry 2001 ;58(11):1065-1071 3331 UI - 13080 AU - Keutgen T AU - Wada R AU - Hagel K AU - Murray M AU - Natowitz JB AU - Cibor J AU - Qin L AU - Hamilton C AU - Makeev A AU - Martin E AU - Liddick S AU - Rowland D AU - Ruangma A AU - Veselsky M AU - Winchester E AU - Souliotis G AU - Yennello S AU - Samant A AU - Sinausero M AU - Fabris D AU - Fioretto E AU - Lunardon M AU - Nebbia G AU - Prete G AU - Viesti G AU - Majka Z AU - Staszel P AU - Kowalski S AU - Zipper W AU - Brandan ME AU - Martinez A AU - Menchaca-Rocha A AU - El Masri Y AD - Texas A&M Univ, Inst Cyclotron, College Stn, TX 77840, USAIst Nazl Fis Nucl, Legnaro, ItalyJagiellonian Univ, PL-31007 Krakow, PolandSilesian Univ, Katowice, PolandUNAM, Mexico City, DF, MexicoUniv Catholique Louvain, B-1348 Louvain, Belgium TI - Coalescence and chemical equilibrium in multifragmentation at intermediate energies MH - Belgium MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824800497 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U83-U83 3332 UI - 13888 AU - Kharchenko VK AD - UNAM, FES Cautitlan, Cautitlan Izcalli 54768, MexicoSobolev Inst Math, Novosibirsk 630090, RussiaKharchenko, VK, UNAM, FES Cautitlan, Cautitlan Izcalli 54768, Mexico TI - Skew primitive elements in Hopf algebras and related identities AB - By means of a quantum analogue of the Specht-Wever criteria we prove that every homogeneous character Hopf algebra over a field of zero characteristic is a quantification of a suitable Lie algebra. The skew primitive elements in character Hopf algebras are characterized in terms of algebraic identities. (C) 2001 Academic Press MH - Mexico|Estado De Mexico MH - Russia PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000168188900009 L2 - LIE-ALGEBRAS SO - Journal of Algebra 2001 ;238(2):534-559 3333 UI - 12086 AU - Khoudeir A AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Los Andes, Fac Ciencias, Ctr Astrofis Teorica, Merida 5101, VenezuelaKhoudeir, A, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Non-Abelian self-duality from self-interaction AB - The non-Abelian self-dual action in three dimensions is derived using the self-interaction mechanism MH - Mexico|Distrito Federal MH - Venezuela PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000172800200001 L2 - Chern-Simons;self-duality;MASSIVE GAUGE-THEORIES; 2ND CLASS CONSTRAINTS; 2+1 DIMENSIONS; FIELD-THEORIES; GRAVITY SO - Modern Physics Letters A 2001 ;16(33):2123-2128 3334 UI - 12601 AU - Khursigara C AU - bul-Milh M AU - Lau B AU - Giron JA AU - Lingwood CA AU - Foster DEB AD - Ryerson Univ, Dept Chem Biol & Chem Engn, Toronto, ON M5B 2K3, CanadaHosp Sick Children, Res Inst, Div Infect Immun Injury & Repair, Toronto, ON M5G 1X8, CanadaBenemerita Univ Autonoma Puebla, Ctr Invest Ciencas Microbiol, Puebla, MexicoFoster, DEB, Ryerson Univ, Dept Chem Biol & Chem Engn, Toronto, ON M5B 2K3, Canada TI - Enteropathogenic Escherichia coli virulence factor bundle-forming pilus has a binding specificity for phosphatidylethanolamine AB - The bundle-forming pilus (BFP) of enteropathogenic Escherichia coli (EPEC), an established virulence factor encoded on the EPEC adherence factor (EAF) plasmid, has been implicated in the formation of bacterial autoaggregates and in the localized adherence of EPEC to cultured epithelial cells. While understanding of the pathogenic mechanism of this organism is rapidly improving, a receptor ligand for BFP has not yet been identified. We now report, using both solid-phase and liposome binding assays, that BFP expression correlates with phosphatidylethanolamine (PE) binding. In a thin-layer chromatogram overlay assay, specific recognition of PE was documented for BFP-expressing strains, including E2348/69, a wild-type EPEC clinical isolate, as well as a laboratory strain, HB101, transformed with a bfp-carrying plasmid. Strains which did not express BFP did not bind PE, including a bfpA disruptional mutant of E2348/69, EAF plasmid-cured E2348/69, and HB101. E2348/69 also aggregated PE-containing liposomes but not phosphatidylcholine- or phosphatidylserine-containing liposomes, while BFP-negative strains did not produce aggregates with any tested liposomes. Purified BFP preparations bound commercial PE standards as well as a PE-containing band within lipid extracts from human epithelial cells and from E2348/69. Our results therefore indicate a specific interaction between BFP and PE and suggest that PE may serve as a BFP receptor for bacterial autoaggregation and may promote localized adherence to host cells, both of which contribute to bacterial pathogenesis MH - Canada MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000171739200002 L2 - HELICOBACTER-PYLORI; LIPID RECEPTORS; CYCLIC PEPTIDE; ADHERENCE; SEQUENCE; MEMBRANES; SURFACE; PROTEIN; CELLS; GENE SO - Infection and Immunity 2001 ;69(11):6573-6579 3335 UI - 11937 AU - Kiel S AU - Perrilliat MD AD - Univ Hamburg, Geol Palaontol Inst & Museum, D-20146 Hamburg, GermanyNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoKiel, S, Univ Hamburg, Geol Palaontol Inst & Museum, Bundesstr 55, D-20146 Hamburg, Germany TI - New gastropods from the Maastrichtian of the Mexcala Formation in Guerrero, southern Mexico, part I: Stromboidea AB - Ten species of stromboid gastropods are described from the lower Maastrichtian near Temalac in Guerrero. A member of Rimella is reported for the first time from the Late Cretaceous. The new aporrhaid genus Mexopus is established to include species with weak ornament and a large tongue of callus extending from the inner lip onto the spire. New species are Rimella mexcala, Anchura denticulata, Lispodesthes lilipus, Mexopus mexicanus, and Mexopus robustus. The Xenophoridae supposedly belong to the Stromboidea rather than the Calyptraeiodea, due to their similar protoconchs MH - Germany MH - Mexico|Distrito Federal PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 5 U4 - Paleontology U5 - J;Article AV - English IS - 0077-7749 UR - ISI:000173397200003 L2 - STROMBID GASTROPODS; PACIFIC SLOPE SO - Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 2001 ;222(3):407-426 3336 UI - 13156 AU - Kimberlin DW AU - Lin CY AU - Jacobs RF AU - Powell DA AU - Frenkel LM AU - Gruber WC AU - Rathore M AU - Bradley JS AU - Diaz PS AU - Kumar M AU - Arvin AM AU - Gutierrez K AU - Shelton M AU - Weiner LB AU - Sleasman JW AU - de Sierra TM AU - Soong SJ AU - Kiell J AU - Lakeman FD AU - Whitley RJ AD - Univ Alabama, Div Pediat Infect Dis, Dept Pediat, Birmingham, AL 35233, USAUniv Arkansas, Dept Pediat, Little Rock, AR 72204, USAOhio State Univ, Dept Pediat, Columbus, OH 43210, USAUniv Washington, Dept Pediat, Seattle, WA 98195, USAVanderbilt Univ, Dept Pediat, Nashville, TN, USAUniv Florida, Hlth Sci Ctr, Dept Pediat, Jacksonville, FL 32209, USAUniv Calif San Diego, Dept Pediat, San Diego, CA 92103, USAChicago Dept Publ Hlth, Chicago, IL, USACase Western Reserve Univ, Dept Pediat, Cleveland, OH 44106, USAStanford Univ, Dept Pediat, Stanford, CA 94305, USACook Childrens Med Ctr, Ft Worth, TX, USASUNY Hlth Sci Ctr, Dept Med, Syracuse, NY 13210, USAUniv Florida, Dept Pediat, Gainesville, FL, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoKimberlin, DW, Univ Alabama, Div Pediat Infect Dis, Dept Pediat, 1600 7th Ave S,Suite 616, Birmingham, AL 35233 USA TI - Natural history of neonatal herpes simplex virus infections in the acyclovir era AB - Objective. During the 2 decades in which effective antiviral therapies have been available for neonatal herpes simplex virus (HSV) disease, changes have been documented not only in the outcomes of infected infants, but also in the natural history of the disease itself. Numerous studies previously have reported that early institution of antiviral therapy is beneficial to the outcome of the disease. The objective of this study was to provide an update of neonatal HSV disease to identify means by which future improvements in the management of HSV-infected neonates can be made. Design/Methods. Neonates enrolled in 2 studies of parenteral acyclovir for the treatment of neonatal HSV disease provided the data source. The National Institute of Allergy and Infectious Diseases Collaborative Antiviral Study Group conducted the studies between 1981 and 1997. A total of 186 patients are summarized, all of whom were treated with acyclovir. Demographic and clinical characteristics of these patients are reported. Results. Comparisons between patients treated in the periods between 1981-1988 and 1989-1997 according to extent of disease revealed that the mean time between the onset of disease symptoms and initiation of therapy has not changed significantly from the early 1980s to the late 1990s. Of all patients evaluated, 40% had fetal scalp monitors during the delivery process. A significant minority of patients did not have skin vesicles at the time of their presentation and did not develop them during the acute HSV disease (39% of patients with disseminated disease; 32% of patients with central nervous system [CNS] disease; and 17% of patients with skin, eye, and/or mouth disease). Among patients with CNS disease, mortality was associated with prematurity. Among patients with disseminated HSV disease treated with acyclovir at 30 mg/kg/d, mortality was associated with aspartate transaminase elevations of greater than or equal to 10 times the upper limit of normal at the time of initiation of acyclovir therapy. Mortality was also associated with lethargy at initiation of antiviral therapy for patients with disseminated disease. Patients' morbidity status was associated with the extent of disease (skin, eye, and/or mouth disease vs CNS vs disseminated). For those patients with CNS disease, morbidity was also associated with seizures at initiation of antiviral therapy. Conclusion. Data presented in the current comparison of neonatal HSV disease over the 2 periods (1981-1988 vs 1989-1997) demonstrate that no progress has been made in decreasing the interval between onset of HSV symptoms and initiation of antiviral therapy. Additional strides in the improvement of disease outcome may occur only if the interval between onset of symptoms and initiation of therapy is shortened. The means by which this will be accomplished lie in increased consideration of neonatal HSV infections in acutely ill infants. Specific data and recommendations to facilitate this goal are contained within MH - USA MH - Mexico|Distrito Federal PB - ELK GROVE VILLAGE: AMER ACAD PEDIATRICS RP - NOT IN FILE U3 - TC 65 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-4005 UR - ISI:000170211800021 L2 - newborn;herpes;simplex virus;acyclovir;VIDARABINE THERAPY; ENCEPHALITIS; VIREMIA SO - Pediatrics 2001 ;108(2):223-229 3337 UI - 13157 AU - Kimberlin DW AU - Lin CY AU - Jacobs RF AU - Powell DA AU - Corey L AU - Gruber WC AU - Rathore M AU - Bradley JS AU - Diaz PS AU - Kumar M AU - Arvin AM AU - Gutierrez K AU - Shelton M AU - Weiner LB AU - Sleasman JW AU - de Sierra TM AU - Weller S AU - Soong SJ AU - Kiell J AU - Lakeman FD AU - Whitley RJ AD - Univ Alabama, Div Pediat Infect Dis, Dept Pediat, Birmingham, AL 35233, USAUniv Arkansas, Dept Pediat, Little Rock, AR 72204, USAOhio State Univ, Dept Pediat, Columbus, OH 43210, USAUniv Washington, Dept Med, Seattle, WA, USAVanderbilt Univ, Dept Pediat, Nashville, TN, USAUniv Florida, Hlth Sci Ctr, Dept Pediat, Jacksonville, FL 32209, USAUniv Calif San Diego, Dept Pediat, La Jolla, CA 92093, USAChicago Dept Publ Hlth, Chicago, IL, USACase Western Reserve Univ, Dept Pediat, Cleveland, OH 44106, USAStanford Univ, Dept Pediat, Stanford, CA 94305, USACook Childrens Med Ctr, Ft Worth, TX, USASUNY Hlth Sci Ctr, Dept Med, Syracuse, NY 13210, USAUniv Florida, Dept Pediat, Gainesville, FL, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoGlaxo Wellcome Inc, Res Triangle Pk, NC 27709, USAKimberlin, DW, Univ Alabama, Div Pediat Infect Dis, Dept Pediat, 1600 7th Ave S,Suite 616, Birmingham, AL 35233 USA TI - Safety and efficacy of high-dose intravenous acyclovir in the management of neonatal herpes simplex virus infections AB - Objective. The objective of this investigation was to establish the safety of high-dose (HD) acyclovir for the treatment of neonatal herpes simplex virus (HSV) disease. In addition, an estimate of therapeutic efficacy was sought, both with respect to mortality and to morbidity. Virologic efficacy of HD acyclovir was also assessed. Participants. Infants who were less than or equal to 28 days old and whose disease was considered to be caused by HSV were enrolled in this study. Patients with central nervous system (CNS; N = 28) or disseminated (N = 41) HSV infection were offered participation in the trial. A small number of patients with HSV disease limited to the skin, eyes, or mouth (SEM; N = 10) or whose disease was clinically consistent with HSV but who did not have virologic confirmation of infection (N = 9) also were enrolled on a compassionate basis. Only patients with virologically confirmed HSV disease were included in efficacy analyses. All enrolled patients were included in safety analyses. Methods. The study was an open-label evaluation of intravenous acyclovir at dosages higher than the 30 mg/kg/d standard dosage approved by the US Food and Drug Administration. The first 16 patients enrolled received intermediate-dose (ID) acyclovir (45 mg/kg/d), and the next 72 patients received HD acyclovir (60 mg/kg/d). Acyclovir was administered in 3 divided daily doses for 21 days. Neonates were assessed prospectively throughout treatment and at scheduled follow-up visits for the first 4 years of life. Data were compared with those of a previous National Institute of Allergy and Infectious Diseases Collaborative Antiviral Study Group trial in which patients received standard-dose (SD) acyclovir for 10 days and in which identical methods (with the exception of acyclovir dosage and duration of therapy) were used. Results. Six (21%) of 29 HD acyclovir recipients whose HSV disease remained localized to the SEM or CNS experienced neutropenia. One of the 6 had an absolute neutrophil count <500/mm(3), and 5 patients had an absolute neutrophil count (ANC) between 500/mm(3) and 1000/mm(3). In all 6 cases, the ANC recovered during continuation of acyclovir at the same dosage or after completion of acyclovir therapy, and there were no apparent adverse sequelae of the transient neutropenia. No other drug-related adverse events were reported among ID or HD recipients, and no other laboratory aberrations could be correlated specifically with antiviral therapy. The survival rate for the patients with disseminated HSV disease treated with HD acyclovir was significantly higher than for those in the previous study treated with SD acyclovir, with an odds ratio (OR) of 3.3 (95% confidence interval [CI]: 1.4-7.9). For patients with CNS disease, however, survival rates were similar for the HD and SD groups. To assess the effect of HD acyclovir on survival for the entire population with neonatal HSV disease, the Cox proportional hazards regression analysis was performed with stratification for disease category (CNS versus disseminated). In performing this analysis, differences in mortality for each disease category were weighted to allow statistical comparison of the treatment dosage groups (HD, ID, and SD). This analysis indicated that the survival rate for patients treated with HD acyclovir was statistically significantly higher than for patients treated with SD acyclovir (OR: 3.3; 95% CI: 1.5-7.3). Recipients of HD acyclovir had a borderline significant decrease in morbidity compared with SD recipients, after stratification for the extent of disease (SEM vs CNS vs disseminated) and controlling for the potential confounding factors of HSV type (HSV-1 vs. HSV-2), prematurity, and disease severity (seizures). Patients treated with HD acyclovir were 6.6 times (adjusted OR; 95% CI: 0.8-113.6) as likely to be developmentally normal at 12 months of age as patients treated with SD therapy. Conclusion. These data support the use of a 21-day course of HD (60 mg/kg/d) intravenous acyclovir to treat neonatal CNS and disseminated HSV disease. Throughout the course of HD acyclovir therapy, serial ANC determination should be made at least twice weekly. Decreasing the acyclovir dosage or administering granulocyte colony-stimulating factor should be considered if the ANC remains below 500/mm(3) for a prolonged period MH - USA MH - Mexico|Distrito Federal PB - ELK GROVE VILLAGE: AMER ACAD PEDIATRICS RP - NOT IN FILE U3 - TC 63 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-4005 UR - ISI:000170211800022 L2 - newborn;herpes simplex virus;acyclovir;VIDARABINE THERAPY; ENCEPHALITIS; PNEUMONIA; TRIAL SO - Pediatrics 2001 ;108(2):230-238 3338 UI - 13562 AU - Kimbrough DL AU - Smith DP AU - Mahoney JB AU - Moore TE AU - Grove M AU - Gastil RG AU - Ortega-Rivera A AU - Fanning CM AD - San Diego State Univ, Dept Geol Sci, San Diego, CA 92182, USACalif State Univ Monterey Bay, Earth Syst Sci & Policy Inst, Seaside, CA 93955, USAUniv Wisconsin, Dept Geol, Eau Claire, WI 54702, USAUS Geol Survey, Menlo Park, CA 94025, USAUniv Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095, USASan Diego State Univ, Dept Geol Sci, San Diego, CA 92182, USAInst Geol, Juriquilla 76000, Queretaro, MexicoAustralian Natl Univ, Canberra, ACT 2601, AustraliaKimbrough, DL, San Diego State Univ, Dept Geol Sci, San Diego, CA 92182 USA TI - Forearc-basin sedimentary response to rapid Late Cretaceous batholith emplacement in the Peninsular Ranges of southern and Baja California AB - The eastern Peninsular Ranges batholith is dominated by voluminous La Posta-type tonalite-granodiorite intrusions that compose half of the magmatic are at present erosion level. Zircon U-Pb and hornblende Ar-40/Ar-39 results from these intrusions indicate that they were emplaced in a remarkably narrow interval (99-92 Ma) that closely followed cessation of west-directed compression of the are system. Emplacement of the La Posta suite coincided with a major pulse of coarse-grained sediment into the adjacent forearc basin in early Cenomanian to middle Turonian time. Paleontologic control, and plutonic age and detrital zircon U-Pb data demonstrate the virtual absence of a time lag between magma emplacement and sedimentary response. The tight Linkage between magmatism, are exhumation, and sediment delivery to the forearc indicates that development of major erosional topography in the are was driven by thermal and mechanical effects associated with large-volume batholith emplacement MH - Australia MH - Mexico|Queretaro MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 11 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000169052100005 L2 - forearc basin;batholith;Peninsular Ranges;geochronology;SIERRA-NEVADA; MEXICO; EXHUMATION; PLUTON; ZONE; AGES SO - Geology 2001 ;29(6):491-494 3339 UI - 13094 AU - Kin'ones SO AU - Kaziev GZ AU - Belskii VK AU - Zavodnik VE AU - de Ita A AU - Volodina VA AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoMoscow State Pedag Univ, Moscow 119882, RussiaLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaKin'ones, SO, Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, Mexico TI - Synthesis and study of sodium hexatungstovanadate(V) AB - The heteropoly compound sodium hexatungstovanadate(V) Na-7[VW6O24] . 14H(2)O was synthesized for the first time and studied by thermogravimetry, IR spectroscopy, and X-ray crystallography. The compound crystallizes in the triclinic system (space group P I): a = 7.997(1) Angstrom, b = 11.146(2) Angstrom, c = 11.328(2) Angstrom, alpha = 60.89 degrees, beta = 73.96 degrees, gamma = 83,62 degrees, Z= 1, p(calcd) = 3.823 g/cm(3) MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0036-0236 UR - ISI:000170273400004 SO - Russian Journal of Inorganic Chemistry 2001 ;46(7):962-966 3340 UI - 13823 AU - Kir'yanov AV AU - Mel'nikov IV AU - Panoiu NC AU - Ginovart F AU - Lara AZ AD - Russian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaCtr Opt Res AC, Guanajuato 37000, MexicoENSSAT, Lab Optron, CNRS, UPRESA 6082, F-22305 Lannion, FranceMorelos State Autonomous Univ, Ctr Res Engn & Appl Sci, Cuernavaca 62210, Morelos, MexicoNYU, Dept Phys, New York, NY 10003, USAKir'yanov, AV, Russian Acad Sci, Inst Gen Phys, Ul Vavilov 38, Moscow 117942, Russia TI - Coherent effects in a dual-frequency soliton interaction AB - The temporal structure of subpicosecond dual-frequency optical solitons propagating through a fiber amplifier is found to evolve either to a dual-frequency bound soliton state or a soliton train. The structure of the emerging optical state mainly depends on the balance between a retarded coherent response which is due to an inverted two-level medium and nonresonant cubic nonlinearity MH - France MH - Mexico|Guanajuato MH - Mexico|Morelos MH - Russia MH - USA PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Editorial Material AV - English IS - 1054-660X UR - ISI:000168357300014 L2 - TI-SAPPHIRE LASER; SELF-INDUCED-TRANSPARENCY; ERBIUM-DOPED FIBER; OPTICAL FIBERS; WAVE-GUIDE; AMPLIFICATION; AMPLIFIER; PROPAGATION; DYNAMICS SO - Laser Physics 2001 ;11(4):522-524 3341 UI - 14379 AU - Kir'yanov AV AU - Aboites V AU - Mel'nikov IV AD - Ctr Invest Opt AC, Leon 37000, Gto, MexicoEcole Natl Super Sci Appl & Technol, Lab Optron, F-22305 Lannion, FranceUniv Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoKir'yanov, AV, Ctr Invest Opt AC, Apartado Postal 948, Leon 37000, Gto, Mexico TI - Enhancing type-II optical second-harmonic generation by the use of a laser beam with a rotating azimuth of polarization AB - We propose a frequency converter which exploits laser pulses with changing state of polarization. The use of such pulses as a pump source for an extracavity doubling crystal is shown to result in the large conversion efficiency. These pulses can also provide a fairly good tool of monitoring the shape of the harmonic pulse. It is shown that temporal variations of the polarization direction experienced by the pump pulse in this system may cause considerable shortening of the harmonic pulse. (C) 2001 American Institute of Physics MH - France MH - Mexico|Guanajuato MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000166772600008 L2 - PUMPED NEODYMIUM LASERS; PASSIVE Q-SWITCH; NONLINEAR ABSORPTION; SATURABLE ABSORBERS; CONVERSION; OSCILLATOR; ANISOTROPY; CRYSTAL; PULSES; STATE SO - Applied Physics Letters 2001 ;78(7):874-876 3342 UI - 12697 AU - Kirchhoff LV AU - Paredes P AU - Becerra-Leyva G AU - Lomeli-Guerrero A AU - Ron-Guerrero C AU - gado-Mejia M AU - Paredes-Espinoza M AU - Pena-Munoz JG AD - Univ Iowa, Iowa City, IA, USAHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoHosp Reg Occidente, Guadalajara, Jalisco, MexicoIMSS, Tepic, Nayarit, MexicoSST, Tepic, Nayarit, Mexico TI - American trypanosomiasis (Chagas disease) in Mexico: Implications for transfusion medicine in the United States MH - Mexico|Jalisco MH - Mexico|Nayarit MH - USA PB - BETHESDA: AMER ASSOC BLOOD BANKS RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0041-1132 UR - ISI:000171001800048 SO - Transfusion 2001 ;41(9):13S-13S 3343 UI - 12751 AU - Klein I AU - Esparza G AU - Weinbaum SA AU - Dejong TM AD - Univ Calif Davis, Dept Pomol, Davis, CA 95616, USAAgr Res Org, Volcani Ctr, Inst Hort, IL-50250 Bet Dagan, IsraelUniv Autonoma Chapingo, CRUCEN, Zacatecas 98000, MexicoKlein, I, Univ Calif Davis, Dept Pomol, Davis, CA 95616, USA TI - Effects of irrigation deprivation during the harvest period on leaf persistence and function in mature almond trees AB - In nut tree orchards in California, irrigation is typically withheld during the harvest period to reduce the likelihood of bark damage during mechanical shaking of the trees. The ensuing water stress, however, may result in premature defoliation and subsequent yield declines. Our objective was to establish and quantify the water stress resulting from irrigation deprivation and determine its impact on leaf function and persistence in mature almond trees (Prunus dulcis (NEU.) D.A. Webb cv. Nonpareil) during a 3-year field experiment. The severity of the water stress was characterized by measurements of predawn leaf (psi (pd)) and midday stem (psi (ms)) water potentials, stomatal conductance (g(s)), net CO2 assimilation rate (A) and leaf abscission. During 1995, psi (ms) of fully irrigated (FI) trees was maintained above -1.0 MPa. In trees in the moderate(MS) and severe-stress (SS) treatments, psi (ms) was reduced to -1.4 to -2.0 MPa and -2.0 to -2.6 MPa, respectively. After 18 days of irrigation deprivation,A was reduced by 32 and 58% at midday and early afternoon, respectively, compared with morning values. A significant decrease in morning values of A only occurred after 30 days of irrigation deprivation. Water-use efficiency and A declined as evaporative demand increased from morning to afternoon. Assimilation also declined seasonally as leaves aged. Midday stem water potential was highly correlated with A, but less so with g(s),. The coefficient of determination between psi (ms) and g(s) improved considerably when vapor pressure deficit and wind were multiply regressed with Tm,. Although A recovered rapidly when MS trees were irrigated, recovery in SS trees was slower and incomplete, Integrating the MS and SS effects for an extended period during 1995 resulted in 14 and 30% declines in A, and 6 and 20% declines in g(s), respectively. The apparent psi (ms) threshold for leaf abscission was -1.8 MPa. Daily canopy light interception declined with decreasing psi (ms) as a result of premature defoliation (and perhaps altered leaf angles) from 67.9% in FI trees to 61.4 and 60.7% in MS and SS trees, respectively MH - Israel MH - Mexico|Zacatecas MH - USA PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 10 U4 - Forestry U5 - J;Article AV - English IS - 0829-318X UR - ISI:000171210500006 L2 - carbon dioxide assimilation;leaf abscission;light interception;Prunus dulcis;stomatal conductance;water stress;water-use efficiency;SOIL-WATER STATUS; PEACH-TREES; GROWTH; RESPONSES; HUMIDITY; STRESS; RESISTANCE; INDICATOR; AMYGDALUS; EXCHANGE SO - Tree Physiology 2001 ;21(14):1063-1072 3344 UI - 12236 AU - Klimov AB AU - Romero JL AU - Saavedra C AD - Univ Guadalajara, Dept Fis, Guadalajara 44410, Jalisco, MexicoConcepcion Univ, Dept Fis, Concepcion, ChileKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44410, Jalisco, Mexico TI - General properties of quantum systems interacting with a field mode in a low-Q cavity AB - We consider the interaction of an arbitrary quantum system with a single field cavity mode without the Rotating-Wave Approximation (RWA). The cavity mode is damped by coupling to a reservoir at zero temperature. We show that the system evolution is governed by an effective Linblad-type master equation with nonzero temperature terms leading to a nonzero stationary state, even without an external driven field. The system evolution under the RWA is also considered. Two particular cases of atom-field and field-field interaction are discussed MH - Chile MH - Mexico|Jalisco PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000172608200086 L2 - OPTICAL MASTER-EQUATIONS; DISSIPATION; DECOHERENCE; ATOMS; COHERENCE; STATES; RESONANCE; INVERSION SO - Physical Review A 2001 ;6406(6): 3345 UI - 13699 AU - Klimov AB AU - Sanchez-Soto LL AU - Delgado J AD - Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoSanchez-Soto, LL, Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, Spain TI - Mimicking a Kerrlike medium in the dispersive regime of second-harmonic generation AB - We find an effective Hamiltonian describing the process of second-harmonic generation in the far-off resonant limit. We show that the dynamics of the fundamental mode is governed by a Kerrlike Hamiltonian. Some dynamical consequences are examined. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Jalisco MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000168621900033 L2 - second harmonic generation;dispersive limit;Kerr medium;Schrodinger cat states;deformed algebras;SCHRODINGER-CAT STATES; QUANTUM-NONDEMOLITION MEASUREMENTS; 2ND-HARMONIC GENERATION; ANHARMONIC-OSCILLATOR; DISTINGUISHABLE STATES; SUPERPOSITION STATES; PHASE FLUCTUATIONS; DOWN-CONVERSION; SQUEEZED STATE; BEAM SPLITTER SO - Optics Communications 2001 ;191(3-6):419-426 3346 UI - 11621 AU - Klimova-Berestneva T AU - Garcia MM AU - Meleshonkova NN AU - Klimova EI AD - Moscow MV Lomonosov State Univ, Moscow, RussiaKlimova-Berestneva, T, Natl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, Mexico TI - Asymmetric induction in the synthesis of 3,4,5-trisubstituted ferrocenyl-4,5-dihydropyrazoles AB - The asymmetric induction in the synthesis of 3,4,5-trisubstituted 4,5-dihydropyrazoles with ferrocenyl substituents, starting from the E and Z isomers of alpha,beta-unsaturated ketones was studied. A high diastereoselectivity was revealed at the 1,2 chiral center --> chiral center induction, which is independent of the configuration of the starting chalcones MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1070-3632 UR - ISI:000174335900031 L2 - QUINUCLIDINE; DERIVATIVES SO - Russian Journal of General Chemistry 2001 ;71(10):1626-1631 3347 UI - 13604 AU - Kobayashi T AU - Kubo J AU - Mondragon M AU - Zoupanos G AD - Kyoto Univ, Dept Phys, Kyoto 6068502, JapanKanazawa Univ, Dept Phys, Kanazawa, Ishikawa 9201192, JapanUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoTech Univ, Dept Phys, GR-15780 Athens, GreeceKobayashi, T, Kyoto Univ, Dept Phys, Kyoto 6068502, Japan TI - Exact finite unified theories AB - Finite Unified Theories are N = 1 supersymmetric GUT's that can be made finite beyond the unification point, including the softly broken sector. The new characteristic predictions of FUTs are: 1) The lightest Higgs boson mass is predicted to be in the window 120-130 GeV, in case the LSP is neutralino, while in case the LSP is the <()over bar> (which can be consistently accommodated in presence of bilinear R-parity violating terms) it can be as light as 111 GeV. 2) The s-spectrum starts above several hundreds of GeV MH - Greece MH - Japan MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000168918400023 L2 - SUPERSYMMETRIC GAUGE-THEORIES; BREAKING TERMS; SOFT; MODELS SO - International Journal of Modern Physics A 2001 ;16(11):2053-2057 3348 UI - 13356 AU - Kober V AU - Mozerov M AU - varez-Borrego J AD - CICESE, Dept Opt, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoRussian Acad Sci, Inst Informat Transmiss Problems, Moscow 101447, RussiaCICESE, Dept Opt, Div Appl Phys, Ensenada 22860, Baja California, MexicoKober, V, CICESE, Dept Opt, Div Fis Aplicada, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - Nonlinear filters with spatially connected neighborhoods AB - A new class of nonlinear filters using rank-order operations over spatially connected neighborhoods and fast algorithms for the design of these filters are presented. Many rank-order processing techniques may be implemented by using filters such as noise suppression, enhancing, and restoring images. The performance of the proposed filters for suppression impulsive noise, additive noise, and mixed additive and impulsive noise in test images is compared to conventional rank-order algorithms. The comparisons are made using a mean square error, a mean absolute error, and a subjective human visual error criteria. (C) 2001 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Russia PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000169701600013 L2 - image processing;nonlinear adaptive filtering;noise smoothing;rank-order filters;median filter;ORDER STATISTIC FILTERS; THRESHOLD DECOMPOSITION; THEORETICAL-ANALYSIS; MEDIAN FILTERS; IMAGE; NOISE; PROCESSOR; REMOVAL SO - Optical Engineering 2001 ;40(6):971-983 3349 UI - 14615 AU - Koenigsberger G AU - Georgiev L AU - Peimbert M AU - Walborn NR AU - Barba R AU - Niemela VS AU - Morrell N AU - Tsvetanov Z AU - Schulte-Ladbeck R AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Nacl La Plata, Fac Ciencias Astron & Geofis, La Plata, Buenos Aires, ArgentinaJohns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218, USAUniv Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAKoenigsberger, G, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - Hubble Space Telescope STIS observations of the Wolf-Rayet star HD 5980 in the Small Magellanic Cloud. II. The interstellar medium components AB - Observations of the interstellar and circumstellar absorption components obtained with the Hubble Space Telescope Space Telescope Imaging Spectrograph (STIS) along the line of sight toward the Wolf-Rayet-luminous blue variable (LBV) system HD 5980 in the Small Magellanic Cloud are analyzed. Velocity components from C I, CI *, C II, CII *, C IV, NI, N V, O I, Mg II, Al II, Si II, Si II*, Si III, Si IV, S II, S III, Fe II, Ni II, Be I, Cl I, and CO are identified, and column densities estimated. The principal velocity systems in our data are (1) interstellar medium (ISM) components in the Galactic disk and halo (V-hel = 1.1 +/- 3, 9 +/- 2 km s(-1)); (2) ISM components in the SMC (V-hel = +87 +/- 6, +110 +/- 6, +132 +/- 6, +158 +/- 8, +203 +/- 15 km s(-1)); (#) SMC supernova remnant SNR 0057 - 7226 components (V-hel = +312 +/- 3, +343 +/- 3, +33, +64 km s(-1)); (4) circumstellar (CS) velocity systems (V-hel = -1020, -840, -630, -530, -300 km s(-1)); and (%) a possible system at -53 +/- 5 km s-1 (seen only in some of the Si II lines and marginally in Fe II) of uncertain origin. The supernova remnant SNR 0057 - 7226 has a systemic velocity of +188 km s(-1), suggesting that its progenitor was a member of the NGC 346 cluster. Our data allow estimates to be made of T-e similar to 40,000 K, n(e) similar to 100 cm(-3), N(H) similar to (4-12) x 10(18) cm(-2) and a total mass between 400 and 1000 M-. for the supernova remnant (SNR) shell. We detect C I absorption lines primary in the +132 and +158 km s(-1) SMC velocity systems. As a result of the LBV-type eruptions in HD 5980, a fast-wind/slow-wind circumstellar interaction region has appeared, constituting the earliest formation stages of a windblown H II bubble surrounding this system. Variations over a timescale of 1 year in this circumstellar structure are detected MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000166173300020 L2 - ISM : bubbles;stars : individual (HD 5980);stars : winds, outflows;supernova remnants;BINARY HD-5980; MASSIVE STARS; ABSORPTION; GAS; EVOLUTION; SYSTEM; LINES; SMC SO - Astronomical Journal 2001 ;121(1):267-282 3350 UI - 13935 AU - Kohno S AU - Matsuyama T AU - Medina RU AU - Arai Y AD - Niigata Univ, Sch Dent, Dept Removable Prosthodont, Niigata 9518514, JapanUniv Autonoma Coahuila, Fac Odontol, Torreon City, MexicoKohno, S, Niigata Univ, Sch Dent, Dept Removable Prosthodont, 5274 Gakkocho 2, Niigata 9518514, Japan TI - Functional-rhythmical coupling of head and mandibular movements AB - It is known that small head movements accompany the movements of the jaw during mastication; however, it is unknown whether these movements occur rhythmically and synchronously. The objective of this study was to determine whether there exists a functional coupling between the head and mandibular movements. Four healthy male adults (mean age 25.5) with normal occlusion and without TMD history were selected as subjects. Using the Trimet system, we measured tridimensionally both the movement of the head and the mandible by tracking upper and lower incisal points, respectively, during tapping movements with different opening range and frequency, then analysed the vertical component of these movements. The upper incisal point moved in opposite direction to the mandible in all tapping strokes in all subjects, during opening the head moved in a cranial direction and during closing in a caudal direction; the incidence rate for this concomitant movement was 98%, implying that the head moves periodically and rhythmically, as the mandible does. The cycle time of these coincident movements showed a correlation coefficient of 0.94. Moreover, the vertical range of head movement was within 10% of the jaw's movement. From these results we concluded that, at least during teeth tapping, the head moves in rhythmical coordination with mandibular movement MH - Japan MH - Mexico|Coahuila PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0305-182X UR - ISI:000168004200008 L2 - head movement;tapping jaw movement;MUSCLES; NUCLEI; CAT SO - Journal of Oral Rehabilitation 2001 ;28(2):161-167 3351 UI - 13273 AU - Komatitsch D AU - Martin R AU - Tromp J AU - Taylor MA AU - Wingate BA AD - Harvard Univ, Cambridge, MA, USAInst Mexicano Petr, Mexico City, DF, MexicoUniv Calif Los Alamos Natl Lab, Los Alamos, NM, USAKomatitsch, D, CALTECH, Seismol Lab, Pasadena, CA 91125, USA TI - Wave propagation in 2-D elastic media using a spectral element method with triangles and quadrangles AB - We apply a spectral element method based upon a conforming mesh of quadrangles and triangles to the problem of 2-D elastic wave propagation. The method retains the advantages of classical spectral element methods based upon quadrangles only. It makes use of the classical Gauss-Lobatto-Legendre formulation on the quadrangles, while discretization on the triangles is based upon interpolation at the Fekete points. We obtain a global diagonal mass matrix which allows us to keep the explicit structure of classical spectral element solvers. We demonstrate the accuracy and efficiency of the method by comparing results obtained for pure quadrangle meshes with those obtained using mixed quadrangle-triangle and triangle-only meshes MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 9 U4 - Acoustics;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0218-396X UR - ISI:000169975600028 L2 - POLYNOMIAL INTERPOLATION; HETEROGENEOUS MEDIA; REAL FUNCTIONS; SIMULATION; POINTS; INTERFACE; 2D SO - Journal of Computational Acoustics 2001 ;9(2):703-718 3352 UI - 12569 AU - Konagai M AU - Tsushima T AU - Kim MK AU - Asakusa K AU - Yamada A AU - Kudriavtsev Y AU - Villegas A AU - Asomoza R AD - Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, Tokyo 1528552, JapanCtr Res & Adv Studies, Dept Elect Engn, Mexico City 07000, DF, MexicoKonagai, M, Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528552, Japan TI - High-rate deposition of silicon thin-film solar cells by the hot-wire cell method AB - The hot-wire cell method has been developed to grow polycrystalline and amorphous Si thin films with relatively high growth rates of 0.4-3.0 nm s(-1). It was found that polycrystalline Si films can be obtained at substrate temperatures of 175-400 degreesC without hydrogen dilution when the filament temperature is 2000-2100 degreesC. Valency control has been carried out using PH3 and B2H6. Up to now, high conductivities of 13 and 4 S cm(-1) have been achieved for n- and p-type polycrystalline Si thin films, respectively. Superstrate-type polycrystalline Si and amorphous Si solar cells prepared with deposition rates of 0.4-1.0 nm s(-1) showed efficiencies of 1.6 and 4.3% under AM1.5 illumination, respectively. We found by SIMS analysis that a high concentration of O and C atoms, of the order of 10(20)-10(21) cm(-3), is incorporated into the film, which limits the performance of the present cell. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000171625000032 L2 - amorphous materials;chemical vapor deposition (CVD);solar cells;hot-wire chemical vapor deposition (HW-CVD);POLYCRYSTALLINE SO - Thin Solid Films 2001 ;395(1-2):152-156 3353 UI - 12269 AU - Kondrashov VS AU - Rothenberg SJ AD - Charles R Drew Univ Med & Sci, Toxicol Res Lab, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoKondrashov, VS, Charles R Drew Univ Med & Sci, Toxicol Res Lab, Environm Res Ctr, 1621 E 120th St, Los Angeles, CA 90059 USA TI - How to calculate lead concentration and concentration uncertainty in XRF in vivo bone lead analysis AB - The authors provide a substantial correction for calculating estimates of lead concentration and uncertainty for in vivo X-ray fluorescent bone analysis with Cd-109 source. Based on general principles, they provide mathematical techniques for propagation of uncertainties in XRF analysis. They give additional considerations for lowering the detection limit and improving spectral data quality. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000172507400009 L2 - X-ray;in vivo bone lead analysis;uncertainty propagation;RAY SO - Applied Radiation and Isotopes 2001 ;55(6):799-803 3354 UI - 12820 AU - Kondrashov VS AU - Rothenberg SJ AU - Petersone I AD - Charles R Drew Univ Med & Sci, Toxicol Res Lab, Los Angeles, CA 90059, USANatl Publ Hlth Inst, Ctr Res Populat Hlth, Cuernavaca 625608, Morelos, MexicoSci & Ind Union Ellat, Riga, LatviaKondrashov, VS, Charles R Drew Univ Med & Sci, Toxicol Res Lab, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Librarian driven analysis with graphic user interface for nuclides quantification by gamma spectra AB - For a set of a priori given radionuclides extracted from a general nuclide data library, the authors use median estimates of the gamma-peak areas and estimates to produce a list of possible radionuclides matching gamma-ray line(s). An a priori determined list of nuclides is obtained by searching for a match with the energy information of the database. This procedure is performed in an interactive graphic mode by markers that superimpose, on the spectral data, the energy information and yields provided by a general gamma-ray data library. This library of experimental data includes approximately 17,000 gamma-energy lines related to 756 known gamma emitter radionuclides listed by ICRP. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Latvia MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000171115600012 L2 - gamma-ray;radionuclides;spectral analysis;numerical methods;librarian approach;multichannel analyzer;windows application;RAY SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2001 ;470(3):583-589 3355 UI - 12991 AU - Kondrashov VS AU - Rothenberg SJ AU - Petersone I AD - Charles R Drew Univ Med & Sci, Toxicol Res Lab, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca 625608, Morelos, MexicoSci & Ind Union Ellat, LV-1005 Riga, LatviaKondrashov, VS, Charles R Drew Univ Med & Sci, Toxicol Res Lab, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Database driven analysis for nuclide quantification by gamma spectra AB - For a set of a priori given radionuclides, extracted from a general nuclide data library, the authors use median estimates of the gamma-peak areas and estimates of their errors to produce a list of possible radionuclides matching gamma-ray line(s) and some measure of the reliability of this assignment. An a priori determined list of nuclides is obtained by searching for a match with the energy information of the database. This procedure is performed in an interactive graphic mode by markers that superimpose the energy information provided by a general gamma-ray data library on the spectral data. This library of experimental data includes approximately 17,000 gamma-energy lines related to 756 known gamma emitter radionuclides listed by ICRP. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Latvia MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000170526600067 L2 - gamma-ray;radionuclides;spectra processing;librarian approach SO - Radiation Physics and Chemistry 2001 ;61(3-6):475-476 3356 UI - 14337 AU - Kondrashov VS AU - Rothenberg SJ AD - Charles R Drew Univ Med & Sci, Toxicol Res Lab, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca 25608, Morelos, MexicoKondrashov, VS, Charles R Drew Univ Med & Sci, Toxicol Res Lab, 1621 E 120th St, Los Angeles, CA 90059 USA TI - One approach for doublet deconvolution to improve reliability in spectra analysis for in vivo lead measurement AB - Calculation of lead concentration from K-series X-ray fluorescent studies uses a robust normalization technique based on the amplitude or area of the elastic signal. Parameter estimation of the elastic signal can be affected by the overlap of the K-beta2 line, especially for concentrations greater than 40 ppm where the K-beta2 amplitude can be greater than 1% of the elastic signal. We tested the combination of estimation by method of least moduli and doublet deconvolution. We found that the estimation of the area of the elastic signal is more robust to changes in the low-energy end of the region of interest with the combined method than with method of least-squares estimation and singlet processing. We recommend use of the combined method for creation of calibration curves at concentrations greater than or equal to 40 ppm. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000166944900013 L2 - X-ray;in vivo bone lead analysis;numerical methods SO - Applied Radiation and Isotopes 2001 ;54(4):691-694 3357 UI - 13286 AU - Koptsevich AB AU - Pavlov GG AU - Zharikov SV AU - Sokolov VV AU - Shibanov YA AU - Kurt VG AD - AF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaPenn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802, USARAS, Special Astrophys Observ, Nizhni Arkhyz 357147, RussiaUNAM, Observ Astron Nacl Inst Astron, Ensenada 22860, Baja California, MexicoRussian Acad Sci, Ctr Astro Space, Moscow 117810, RussiaKoptsevich, AB, AF Ioffe Phys Tech Inst, Politekhnicheskaya 26, St Petersburg 194021, Russia TI - Optical photometry of the PSR B0656+14 and its neighborhood AB - We present the results of broad-band photometry of the nearby middle-aged radio pulsar PSR B0656+14 and its neighborhood obtained with the 6-meter telescope of the SAO RAS and with the Hubble Space Telescope. The broad-band spectral flux F-v of the pulsar decreases with increasing frequency in the near-IR range and increases with frequency in the near-UV range. The increase towards UV can be naturally interpreted as the Rayleigh-Jeans tail of the soft thermal component of the X-ray spectrum emitted from the surface of the cooling neutron star. Continuation of the power-law component, which dominates in the high-energy tail of the X-ray spectrum, to the IR-optical-UV frequencies is consistent with the observed fluxes. This suggests that non-thermal pulsar radiation may be of the same origin in a broad frequency range from IR to hard X-rays. We also studied 4 objects detected within 5" from the pulsar MH - Mexico|Baja California MH - Russia MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 30 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000169942100024 L2 - stars : neutron;pulsars : individual : PSR B0656+14, Geminga;PULSAR-WIND NEBULAE; SPACE-TELESCOPE OBSERVATIONS; TIME RESOLUTION; NEUTRON-STARS; CRAB-NEBULA; GEMINGA; PSR-0656+14; EMISSION; ULTRAVIOLET; SPECTRUM SO - Astronomy & Astrophysics 2001 ;370(3):1004-1016 3358 UI - 13343 AU - Korchagin V AU - Mayya YD AU - Vorobyov E AD - Inst Phys, Rostov On Don, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoInst Phys, Rostov On Don, RussiaKorchagin, V, Inst Phys, Stachki 194, Rostov On Don, Russia TI - Optical color gradients in star-forming ring galaxies AB - We compute radial color gradients produced by an outwardly propagating circular wave of star formation and compare our results with color gradients observed in the classical ring galaxy, the "Cartwheel." We invoke two independent models of star formation in the ring galaxies. The first one is the conventional density wave scenario, in which an intruder galaxy creates a radially propagating density wave accompanied by an enhanced star formation following the Schmidt's law. The second scenario is a pure self-propagating star formation model, in which the intruder sets off only the first burst of stars at the point of impact. Both models give essentially the same results. Systematic reddening of B-V, V-K colors toward the center, such as that observed in the Cartwheel, can be obtained only if the abundance of heavy elements in the star-forming gas is a few times below solar. The B-V and V-K color gradients observed in the Cartwheel can be explained as a result of mixing of stellar populations born in a star-forming wave propagating through a low-metallicity gaseous disk, and a preexisting stellar disk of the size of the gaseous disk with color properties typical to those observed in nearby disk galaxies MH - Mexico|Puebla MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000169690800026 L2 - galaxies : individual (A0035-324);galaxies : photometry;galaxies : stellar content;stars : formation;CARTWHEEL GALAXY; POPULATION SYNTHESIS; STARBURST REGIONS; NEUTRAL HYDROGEN; STELLAR; DUST; MODELS; WHEELS; DISK; FIRE SO - Astrophysical Journal 2001 ;554(1):281-290 3359 UI - 6156 AU - Korjik V AU - Morozov K AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Sect Telecommun, Mexico City 07000, DF, Mexico. State Univ Telecommun, Telecommun Secur Dept, St Petersburg 191186, Russia TI - Generalized oblivious transfer protocols based on noisy channels AB - The main cryptographic primitives (Bit Commitment (BC) and Oblivious Transfer (OT) protocols) based on noisy channels have been considered in [1] for asymptotic case. Non-asymptotic behavior of BC protocol has been demonstrated in [2]. The current paper provides stricter asymptotic conditions on Binary Symmetric Channel (BSC) to be feasible OT protocol proposed in [1]. We also generalize this protocol using different encoding and decoding methods that require to regain formulas for Renyi entropy. Non-asymptotic case (finite length of blocks transmitted between parties) is also presented. Some examples are given to demonstrate that these protocols are in fact reliable and information-theoretically secure. We also discuss the problem-how to extend ((2)(1))-OT protocol to ((L)(1))-OT protocol and how to arrange BSC connecting parties. Both BC and OT protocols can be used as components of more complex and more important for practice protocols like "Digital cash", "Secure election" or "Distance bounding" MH - Mexico|Distrito Federal MH - Russia T3 - INFORMATION ASSURANCE IN COMPUTER NETWORKS: METHODSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlevkorjik@mail.cinvestav.mx kirill@fem.sut.ru2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY43H AV - English IS - 0302-9743 UR - ISI:000189224600022 SO - 2001 ;():219-229 3360 UI - 12375 AU - Korneev N AU - Veenhuis H AU - Buse K AU - Kratzig E AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Osnabruck, Fachbereich Phys, D-49069 Osnabruck, GermanyKorneev, N, Inst Nacl Astrofis Opt & Elect, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - Thermal fixing of holograms and their electrically assisted development in barium calcium titanate crystals AB - Photorefractive space-charge gratings in barium calcium titanate crystals are studied with non-steady-state photoelectromotive force and holographic techniques in the temperature range from 20 to 160 degreesC. Although the crystals undergo a ferroelectric-paraelectric phase transition at 100 degreesC, no sharp discontinuity of the space-charge field is observed. However, a slowly compensating grating is found, and thermal fixing is demonstrated. The behavior of the fixed grating is well described by a theory that was developed for lithium niobate. The lifetime of the fixed grating depends strongly on fringe spacing and temperature, and the diffraction efficiency of the fixed grating can be drastically enhanced by application of an external electric field. (C) 2001 Optical Society of America MH - Germany MH - Mexico|Puebla PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000172089800004 L2 - DIFFRACTION EFFICIENCY; LITHIUM-NIOBATE; GRATINGS; ORIGIN; LINBO3; HYDROGEN; BATIO3; KNBO3 SO - Journal of the Optical Society of America B-Optical Physics 2001 ;18(11):1570-1577 3361 UI - 12470 AU - Korovin LI AU - Lang IG AU - Contreras-Solorio DA AU - Pavlov ST AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Escuela Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaKorovin, LI, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - The role of spatial dispersion of an electromagnetic wave in its penetration through a quantum well AB - The theory of light penetration through a quantum well in a strong magnetic field perpendicular to the well plane is developed under the conditions where interband transitions occur in the well. The light wavelength is assumed to be comparable to the well width. The relationships for the reflection, absorption, and transmission are derived with due regard for the spatial dispersion of a monochromatic light wave and the difference between the refractive indices of the quantum well and the barrier. The normal incidence of light with respect to the well plane is considered, and one excited level is taken into account. It is demonstrated that the above two factors most strongly affect the reflection, because the reflection from the well boundaries appears in addition to the reflection caused by interband transitions in the quantum well. The most radical changes in the reflection are observed in the case when the reciprocal radiative lifetime of the excited state in the quantum well is short compared to the reciprocal nonradiative lifetime. In the range of large well widths, the applicability of the theory is limited by the existence condition of quantum well levels. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000171918900033 L2 - PULSE; EXCITONS SO - Physics of the Solid State 2001 ;43(11):2182-2191 3362 UI - 12308 AU - Kosarek JL AU - Garcia P AU - Morris ML AD - Univ Illinois, Dept Agr & Consumer Econ, Urbana, IL 61801, USACIMMYT, Econ Program, Mexico City 06600, DF, MexicoGarcia, P, Univ Illinois, Dept Agr & Consumer Econ, 1301 W Gregory Dr, Urbana, IL 61801 USA TI - Factors explaining the diffusion of hybrid maize in Latin America and the Caribbean region AB - If future demand for maize in Latin America and the Caribbean region (LAC) is to be met from local sources, domestic production must continue to increase. Because further expansion in the area planted to maize is precluded by the limited availability of arable land, future increases in production will have to rely heavily on the spread of productivity-enhancing hybrid technology. Until now, the diffusion of hybrid maize in LAC has been quite variable. Using data from 18 countries, we investigate factors affecting the hybrid maize diffusion rate. Our findings validate conventional profitability-based explanations of producer adoption behavior, but they also confirm the importance of supply-side factors, thereby providing empirical support for the life cycle theory of seed industry development. We conclude that if policy makers in LAC are to accelerate the diffusion of hybrid maize, they will have to ensure an environment in which it is not only profitable for producers to adopt improved germplasm, but also profitable for the seed industry to produce and sell high-quality seed. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000172407300007 L2 - maize;diffusion;Latin America;Caribbean;ADOPTION SO - Agricultural Economics 2001 ;26(3):267-280 3363 UI - 14352 AU - Koshevaya SV AU - Kanevsky VI AU - Tecpoyotl-Torres M AU - Burlak GN AU - Escobedo-Alatorre J AU - Chayka VE AD - Autonomous Univ Morelos, Res Ctr Appl Sci & Engn, Cuernavaca 62210, Morelos, MexicoKiev Tech Univ, Kiev, UkraineKoshevaya, SV, Autonomous Univ Morelos, Res Ctr Appl Sci & Engn, Av Univ 1001,6 Piso Torre Univ, Cuernavaca 62210, Morelos, Mexico TI - Modelling of vacuum-silicon solid microwave diodes and triodes based on P++-N and on tungsten cathodes AB - This work reports the analysis of vacuum-solid microwave diodes and triodes. It shows the possibility to use these devices as amplifiers and generators in the millimetre and submillimetre ranges. It is also possible to create multipliers with a large multiplication factor and small multiplication losses. Additionally, the analysis of the basic parameters of these vacuum-solids microwave diodes with different types of cathodes, shows that the efficiency and the frequency band of diodes with P++-N cathode are smaller than for the case of tungsten diodes. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Ukraine PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000166858400006 L2 - field-emission;vacuum-solid diode and triode SO - Microelectronics Journal 2001 ;32(2):133-136 3364 UI - 14353 AU - Koshevaya SV AU - Kanevsky VI AU - Tecpoyotl M AU - Gutierrez EA AU - Burlak GN AU - Chayka VE AD - Autonomous Univ Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoKiev Tech Univ, Kiev, UkraineNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoKoshevaya, SV, Autonomous Univ Morelos, CIICAp, Av Univ 10001, Cuernavaca 62210, Morelos, Mexico TI - Vacuum-silicon solid microwave diodes and triodes based on P++-N and on tungsten cathodes AB - This work reports the analysis of vacuum-solid microwave diodes and triodes. It shows the possibility to use these devices as amplifiers and generators in millimetre and submillimetre ranges. It is also possible to create multipliers with a large multiplication factor and small losses of the multiplication. In addition, the analysis of the basic parameters of these vacuum-solids microwave diodes with different types of cathodes shows that the diodes with a back voltage P++-N cathode have a wide frequency band, but an efficiency smaller than that of the tungsten diodes. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000166858400011 L2 - vacuum-solid microwave diodes and triodes;tungsten cathodes;amplifiers and generators SO - Microelectronics Journal 2001 ;32(2):173-175 3365 UI - 12493 AU - Kosobukin VA AU - Sel'kin AV AD - RAS, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaICBUAP, CIDS, Puebla 72000, MexicoKosobukin, VA, RAS, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia TI - Quantum-well excitonic effects in Fabry-Perot films and microcavities: Resonant elastic scattering of light due to interface roughness AB - Within a proposed model of quasi-two-dimensional excitons in a quantum well (QW) a correlation theory has been developed for resonant elastic scattering of light from excitonic polarization fluctuations induced by randomly rough interfaces. For a single QW placed in a Fabry-Perot many-layer dielectric environment, intensity of the exciton-mediated elastic scattering of light is shown to be two orders of magnitude larger than that of the nonresonant scattering. The resonant excitonic contribution is concluded to be measurable even for a single QW whose interface r.m.s. roughness height is comparable to atomic monolayer thickness MH - Mexico|Puebla MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900052 SO - Modern Physics Letters B 2001 ;15(17-19):782-786 3366 UI - 12536 AU - Kostoff RN AU - del Rio JA AU - Humenik JA AU - Garcia EO AU - Ramirez AM AD - Off Naval Res, Arlington, VA 22217, USAUNAM, Ctr Invest Energia, Temixco, Morelos, MexicoNOESIS Inc, Manassas, VA, USAKostoff, RN, Off Naval Res, Arlington, VA 22217, USA TI - Citation mining: Integrating text mining and bibliometrics for research user profiling AB - Identifying the users and impact of research is important for research performers, managers, evaluators, and sponsors. It is important to know whether the audience reached is the audience desired. It is useful to understand the technical characteristics of the other research/development/applications impacted by the originating research, and to understand other characteristics (names, organizations, countries) of the users impacted by the research. Because of the many indirect pathways through which fundamental research can impact applications, identifying the user audience and the research impacts can be very complex and time consuming. The purpose of this article is to describe a novel approach for identifying the pathways through which research can impact other research, technology development, and applications, and to identify the technical and infrastructure characteristics of the user population. A novel literature-based approach was developed to identify the user community and its characteristics. The research performed is characterized by one or more articles accessed by the Science Citation Index (SCI) database, beccause the SCI's citation-based structure enables the capability to perform citation studies easily MH - Mexico|Morelos MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 20 U4 - Computer Science, Information Systems;Information Science & Library Science U5 - J;Article AV - English IS - 1532-2882 UR - ISI:000171753100006 L2 - DATABASE TOMOGRAPHY; SCIENCE; IMPACT SO - Journal of the American Society for Information Science and Technology 2001 ;52(13):1148-1156 3367 UI - 11998 AU - Kotov AA AU - Elias-Gutierrez M AU - Gutierrez-Aguirre M AD - AN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaEI Colegio Frontera Sur, Quintana Roo 77000, MexicoElias-Gutierrez, M, AN Severtsov Inst Ecol & Evolut, Leninsky Prospect 33, Moscow 117071, Russia TI - Ilyocryptus paranaensis inarmatus subsp nov from Tabasco, Mexico (Cladocera. Anomopoda) AB - Ilyocryptus paranaensis Paggi, 1989 is found at four localities in the basin of the Usumacinta River, Tabasco, southern Mexico. A new subspecies I, paranaensis inarmatus subsp. nov. is established for Mexican populations of this species. Probably, this subspecies is an endemic with a distribution restricted to the Usumacinta basin. The differences between the new subspecies and the nominate form are discussed MH - Mexico|Quintana Roo MH - Russia PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000173222800006 L2 - NEOVOLCANIC PROVINCE; BRANCHIOPODA; MACROTHRICIDAE; REDESCRIPTION; CRUSTACEA; ARGENTINA; SMIRNOVI; MEMBER; TAXA SO - Crustaceana 2001 ;74():1067-1082 3368 UI - 12500 AU - Kotowicz C AU - Hernandez LR AU - Cerda-Garcia-Rojas CM AU - Villecco MB AU - Catalan CAN AU - Joseph-Nathan P AD - Univ Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaInst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoJoseph-Nathan, P, Univ Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, Ayacucho 471, RA-4000 San Miguel De Tucuman, Tucuman, Argentina TI - Absolute configuration of trixanolides from Trixis pallida AB - The aerial parts of Trixis pallida afforded seven known trixanolides (18-24) together with 17 new trixanolides (1-17). Their structures were determined by 1D and 2D NMR techniques, while the absolute configuration of the trixane skeleton was determined using the Mosher method and turned out to be enantiomeric to that reported using the Horeau method. This result is further discussed from the biosynthetic point of view MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000171864700014 L2 - ISOCEDRENE DERIVATIVES; CONSTITUENTS SO - Journal of Natural Products 2001 ;64(10):1326-1331 3369 UI - 13955 AU - Kovacs JM AU - Wang JF AU - Blanco-Correa M AD - Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, CanadaUniv Western Ontario, Dept Geog, London, ON N6A 5C2, CanadaUniv Autonoma Nayarit, Direcc Invest Cient, Tepic Nayarit 63190, MexicoKovacs, JM, Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, Canada TI - Mapping disturbances in a mangrove forest using multi-date landsat TM imagery AB - To evaluate the accounts of local fishermen, Landsat TM images (1986, 1993, 1999) were examined to assess potential losses in the mangrove forests of the Teacapan-Agua Brava lagoon system, Mexico. A binary change mask derived from image differencing of a band 4/3 ratio was employed to calculate any changes within this forested wetland. The results indicate that by 1986 approximately 18% (or 86 km(2)) of the mangrove area under study was either dead or in poor condition. The majority of this damage had occurred in the eastern section of the Agua Brava basin. which coincides, with the reports of the elderly fishermen. Examination of aerial photographs from 1970 revealed no adverse impacts in this area and would suggest, as postulated by the fishermen and other scientists, that modifications in environmental conditions following the opening of a canal, Cuautla canal, in 1972 may have initiated the large-scale mortality. Although these areas of impact are still developing, the results from the satellite data indicate that the majority of the more recent changes are occurring elsewhere in the system. Obvious in the 1999 satellite data, but not so in the 1993, are large areas of mangrove degradation in the northern section of the Teacapan region. In the Agua Brava basin, the more recent transformations are appearing on the western side of the basin. Since long-term records of environmental conditions are absent, it is difficult to determine why these latest changes are occurring or even if the earlier losses were the result of the canal. Potential agents of change that have recently been observed include a hurricane, a second canal, and the uncontrolled expansion of the Cuautla canal since 1994 MH - Canada MH - Mexico|Nayarit PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0364-152X UR - ISI:000168039500011 L2 - landsat TM;mangrove;degradation;Mexican Pacific;REMOTE; KNOWLEDGE; FLORIDA SO - Environmental Management 2001 ;27(5):763-776 3370 UI - 14156 AU - Kovacs JM AU - Blanco-Correa M AU - Flores-Verdugo F AD - Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, CanadaUniv Autonoma Nayarit, Direcc Invest Cient, Tepic 63190, Nayarit, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoKovacs, JM, Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, Canada TI - A logistic regression model of hurricane impacts in a mangrove forest of the Mexican Pacific AB - Hurricane Rosa inflicted considerable damage to the mangrove forests of the Teacapan-Agua Brava Lagoon System of Mexico. Data collected from five transects indicate an overall reduction in stem density and basal area of approximately 31 and 51 percent respectively. Of the 1390 trees examined, only 44% remained well vegetated and 28% were found with their main stem broken or uprooted. Rhizophora mangle was the species least affected by the event with 65% of these trees found in a well vegetated condition in contrast to 34% for Laguncularia racemosa and 42% for Avicennia germinans. A polytomous logistic regression model was developed to further examine the predicted outcome, vegetation condition. by species, main stem condition and diameter at breast height (DBH). Rhizophora was excluded from the model and DBH was reserved as a continuous variable. The results from this multivariate approach indicate that the probability of a mangrove being found in a dead condition as compared to a well vegetated one is significantly influenced by the diameter and main stem condition but not by the species. As diameter increases, the odds that an intact tree will be classified as dead rather than in a well vegetated condition also increases. A broken or uprooted main stem also augments this probability but diameter and the uprooted condition interact to attenuate the odds. By comparing a poorly vegetated to a well vegetated outcome, the model again indicates that, separately, increased diameter, the condition of a broken or uprooted main stem all increase the odds of a less favorable outcome. More significant interactions were also recorded, including the interaction of species by both diameter and the uprooted condition. Although seedling counts suggest considerable recovery following the hurricane, Avicennia and Rhizophora dominated the numbers. Changes in light conditions, local topography and substrate conditions following this rare storm event may not currently favour the growth of Laguncularia seedlings MH - Canada MH - Mexico|Nayarit MH - Mexico|Sinaloa PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000167468700003 L2 - coastal forested wetland;multinomial logit model;Pacific coast;Mexico;SOUTHERN FLORIDA; DAMAGE; ANDREW SO - Journal of Coastal Research 2001 ;17(1):30-37 3371 UI - 14151 AU - Kowolik MJ AU - Dowsett SA AU - Rodriguez J AU - de la Rosa M AU - Eckert GJ AD - Indiana Univ, Sch Dent, Dept Periodont, Indianapolis, IN 46202, USAUniv Autonoma Nuevo Leon, Monterrey, MexicoIndiana Univ, Sch Med, Indianapolis, IN 46202, USAKowolik, MJ, Indiana Univ, Sch Dent, Dept Periodont, 1121 W Michigan St, Indianapolis, IN 46202 USA TI - Systemic neutrophil response resulting from dental plaque accumulation AB - Background: There is considerable current interest in putative relationships between oral and systemic diseases. Since the host response to oral bacteria may be the critical link in this association, our hypothesis was that dental plaque accumulation in healthy subjects would elicit a systemic inflammatory response. Methods: Twenty-three healthy subjects, aged 18 to 25, participated in a 4-phase study. An initial hygiene phase was followed by a 21-day experimental phase (the so-called experimental gingivitis model) in which subjects refrained from all oral hygiene practices, thus permitting the accumulation of bacterial plaque. At days 0, 7, and 21 total and differential peripheral white blood cell (wbc) counts, together with full mouth plaque and gingivitis scores, were recorded. Following a 28-day recovery phase, in which normal oral hygiene practices were resumed, subjects entered the final 21-day control phase which mirrored the experimental phase but with subjects maintaining normal oral hygiene practices. Results: The experimental model performed as anticipated with a correlation between plaque and gingivitis scores of 0.95, also reflecting subject compliance. Total wbc and neutrophil counts increased during the experimental phase. Furthermore, comparison of neutrophil counts between the experimental and control phases demonstrated a significantly higher cell count for the experimental phase on both days 7 and 21 (P = 0.0301 and 0.009, respectively). For total wbc, this was significant on day 21 (P = 0.0262). Conclusion: The results of this study support the hypothesis that the accumulation of dental plaque can result in a measurable systemic inflammatory response, providing further in vivo data to support a mechanistic relationship between oral and systemic pathology MH - USA MH - Mexico|Nuevo Leon PB - CHICAGO: AMER ACAD PERIODONTOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-3492 UR - ISI:000167491100004 L2 - dental plaque, adverse effects;neutrophils;inflammatory response;systemic diseases;leukocytes;dental models;CORONARY HEART-DISEASE; INFECTIVE ENDOCARDITIS; LEUKOCYTE COUNTS; RISK; SPEEDWELL; EVENTS SO - Journal of Periodontology 2001 ;72(2):146-151 3372 UI - 13338 AU - Kozanoglu BU AU - Vilchez JA AU - Casal J AU - Arnaldos J AD - Univ Politecn Catalunya, Ctr Estudis Risc Tecnol, Inst Estudis Catalans, ETSEIB,Chem Engn Dept, E-08028 Barcelona, Catalona, SpainUniv Americas, Dept Mech Engn, Puebla 72820, MexicoArnaldos, J, Univ Politecn Catalunya, Ctr Estudis Risc Tecnol, Inst Estudis Catalans, ETSEIB,Chem Engn Dept, Diagonal 647, E-08028 Barcelona, Catalona, Spain TI - Mass transfer coefficient in vacuum fluidized bed drying MH - Mexico|Puebla MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0009-2509 UR - ISI:000169709500021 SO - Chemical Engineering Science 2001 ;56(12):3899-3901 3373 UI - 13017 AU - Kozelka J AU - Elizondo-Riojas MA AD - Univ Paris 05, Chim & Biochim Pharmacol & Toxicol Lab, CNRS, UMR 8601, F-75006 Paris 06, FranceUniv Autonoma Nuevo Leon, CUCC, Monterrey, Mexico TI - Structure and conformational flexibility of cisplatin-DNA crosslinks studied by means of molecular dynamics simulations MH - France MH - Mexico|Nuevo Leon PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Meeting Abstract AV - English IS - 0162-0134 UR - ISI:000170467300108 SO - Journal of Inorganic Biochemistry 2001 ;86(1):64-64 3374 UI - 14465 AU - Kranakis E AU - Krizanc D AU - Maheshwari A AU - Sack JR AU - Urrutia J AD - Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaWesleyan Univ, Dept Math, Middletown, CT 06459, USAUniv Nacl Autonoma Mexico, Inst Math, Mexico City 04510, DF, MexicoMaheshwari, A, Carleton Univ, Sch Comp Sci, 5302 Herzberg Bldg,1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada TI - Ray shooting from convex ranges AB - Consider a set X of n-points in space, each with positive z-coordinate, and a compact plane convex set S. We define a graph G(X,S), called the ray-shooting graph, on X as follows: The points of X are the vertices and {p(i), p(j)}, p(i), p(j) is an element of X, is an edge if and only if the infinite line joining p(i) to p(j) intersects S. In this paper we provide a characterization of shooting graphs; they are exactly the set of comparability graphs of containment orders arising from families of plane homothetic convex sets. We also prove that the crossing number of these ordered sets is at most 2, and that not all comparability graphs are three-dimensional ray-shooting graphs. (C) 2001 Elsevier Science B.V. All rights reserved. MSC. 68R10; 68U05 MH - Canada MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0166-218X UR - ISI:000166594500004 L2 - partial orders;geometric containment;ray shooting graphs;CROSSING NUMBER; CIRCLE ORDERS; ANGLE ORDERS; GON ORDERS SO - Discrete Applied Mathematics 2001 ;108(3):259-267 3375 UI - 13393 AU - Krasheninnikov SI AU - Soboleva TK AD - Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoKurchatov Inst, Moscow, RussiaKrasheninnikov, SI, Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA TI - On equilibria of finite pressure plasma in magnetic multipoles AB - Separable solutions of finite plasma pressure equilibrium in a point multipole are found. Using the energy principle it is demonstrated that these solutions are interchange stable for quadripole and sextipole configurations. The low and high pressure forms of the solution in sextipole configuration are explicitly displayed. (C) 2001 American Institute of Physics MH - USA MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-664X UR - ISI:000169525800026 L2 - DIPOLE EQUILIBRIUM; POINT DIPOLE; FIELD; STABILITY SO - Physics of Plasmas 2001 ;8(7):3356-3357 3376 UI - 12558 AU - Kravchenko VF AU - Ponomarev VI AU - Pustovoit VI AD - Russian Acad Sci, Inst Radio Engn & Elect, Moscow 103907, RussiaNatl Polytech Inst Mexico, Mexico City, DF, MexicoRussian Acad Sci, Cent Design Bur Unique Instrumentat, Moscow 117342, RussiaPustovoit, VI, Russian Acad Sci, Inst Radio Engn & Elect, Ul Mokhovaya 18, Moscow 103907, Russia TI - Algorithms of robust image filtering with the preservation of fine details in the presence of noise MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 1028-3358 UR - ISI:000171830100009 SO - Doklady Physics 2001 ;46(9):642-646 3377 UI - 13848 AU - Kravchenko VF AU - Basarab MA AU - Pustovoit VI AU - Perez-Meana H AD - Russian Acad Sci, Inst Radio Engn & Elect, Moscow 103907, RussiaBauman State Tech Univ, Moscow 107005, RussiaRussian Acad Sci, Cent Design Bur Unique Instrumentat, Moscow 117342, RussiaInst Politecn Nacl, Unidad Culhuacan, Mexico City, DF, MexicoKravchenko, VF, Russian Acad Sci, Inst Radio Engn & Elect, Ul Mokhovaya 18, Moscow 103907, Russia TI - New constructions of weight windows based on atomic functions in problems of speech-signal processing MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 1028-3358 UR - ISI:000168312200007 SO - Doklady Physics 2001 ;46(3):166-172 3378 UI - 14068 AU - Kravchenko VF AU - Ponomarev VI AU - Pustovoit VI AU - Ninjo-de-Rivera L AD - Russian Acad Sci, Inst Radio Engn & Elect, Moscow 103907, RussiaNatl Polytech Inst Mexico, Mexico City 04430, DF, MexicoRussian Acad Sci, Cent Design Bur Unique Instrumentat, Moscow 117342, RussiaKravchenko, VF, Russian Acad Sci, Inst Radio Engn & Elect, Ul Mokhovaya 18, Moscow 103907, Russia TI - Robust nonlinear image filtration with retention of small-size details in the presence of pulse and multiplicative interferences MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 1028-3358 UR - ISI:000167612100008 L2 - FILTER SO - Doklady Physics 2001 ;46(2):97-102 3379 UI - 14260 AU - Kreimer D AU - Mielke EW AD - Univ Mainz, Inst Phys, D-55099 Mainz, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoKreimer, D, Univ Mainz, Inst Phys, D-55099 Mainz, Germany TI - Comment on "Topological invariants, instantons, and the chiral anomaly on spaces with torsion" AB - In Riemann-Cartan spacetimes with torsion only its axial covector piece A couples to massive Dirac fields. Using renormalization group arguments, we show that in addition to the familiar Riemannian term only the Pontrjagin type four-form dA boolean AND dA arises additionally in the chiral anomaly, but not the Nieh-Yan term d*A, as has been claimed in a recent paper [Phys. Rev. D. 55, 7580 (1997)] MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Editorial Material AV - English IS - 0556-2821 UR - ISI:000166996900092 L2 - RIEMANN-CARTAN SPACE; GENERAL-RELATIVITY; GAUGE-THEORY; GRAVITY; VARIABLES; GEOMETRY SO - Physical Review D 2001 ;6304(4): 3380 UI - 12865 AU - Kroeger A AU - Ochoa H AU - Arana B AU - Diaz A AU - Rizzo N AU - Flores W AD - Univ Liverpool, Liverpool Sch Trop Med, Latin Amer Ctr Hlth Res, Liverpool L3 5QA, Merseyside, EnglandColegio Frontera Sur, Dept Hlth, San Cristobal De Casas, Chiapas, MexicoUniv Valle Guatemala, Ctr Hlth Studies, Guatemala City, GuatemalaKroeger, A, Univ Liverpool, Liverpool Sch Trop Med, Latin Amer Ctr Hlth Res, Pembroke Pl, Liverpool L3 5QA, Merseyside, England TI - Inadequate drug advice in the pharmacies of Guatemala and Mexico: the scale of the problem and explanatory factors AB - A study of urban pharmacies in Guatemala and in Chiapas, southern Mexico, was undertaken to analyse the scale of the inadequate drug advice provided, and to identify the contributing factors. The estimate of the scale of the problem was based on the results of 969 approaches to 191 pharmacies by 'magic clients' (i.e. researchers pretending to be looking for treatment for relatives who had one of three 'tracer' diseases), interviews with 4469 pharmacy users as they left the same 191 pharmacies, and a comparison of the quality of advice offered by public and private pharmacies in Guatemala (based on exit interviews with 150 users). The contributing factors were explored using a provider survey (interviews with 166 pharmacy supervisors and 371 drug vendors), an in-depth study analysing large-chain and independent Mexican pharmacies, and a review of the national drug policies in both countries. Although only about 11% of all drug treatments were recommended in pharmacies (the rest being prescribed by physicians or recommended by kin-groups), this still represents large numbers of treatments. Overall, 501 individuals who visited the 191 study pharmacies over 2 days of observation received drugs recommended by pharmacy staff. Much of the pharmacy advice was revealed to be poor >80% of the treatments recommended to the 'magic clients' for diarrhoeal disease or acute respiratory infection included unnecessary or dangerous drugs. Few of those who worked in the pharmacies based their advice on careful case histories. Drug advice in pharmacies was much more likely to be of poor quality than that from physicians or even kin-groups. The factors behind this poor advice were identified as a lack of knowledge about standard treatments and legal regulations, incompetence among pharmacy staff, commercial pressures (particularly in the large-chain pharmacies of Mexico), and a failure to implement the existing regulations covering the drug market and its retail practices. It is recommended that: (1) pharmacy owners and drug vendors be made more aware that the selling of drugs should involve provision of healthcare (as well as reasonable profit-making); (2) existing drug-related legislation be reinforced (through consensus-building rather than coercion); and (3) mass training of pharmacy supervisors and drug vendors, in the standard treatment of common diseases, be undertaken. This process will be challenging and slow MH - United Kingdom MH - Guatemala MH - Mexico|Chiapas PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health;Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0003-4983 UR - ISI:000171035700006 L2 - DIARRHEA; PRESCRIPTION; HOUSEHOLD; COMMUNITY; COUNTRIES; BEHAVIOR; PATTERNS; PRIVATE SO - Annals of Tropical Medicine and Parasitology 2001 ;95(6):605-616 3381 UI - 14334 AU - Krongold Y AU - Dultzin-Hacyan D AU - Marziani P AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsservatorio Astron Padova, I-35122 Padua, ItalyKrongold, Y, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - Host galaxies and circumgalactic environment of "narrow line" Seyfert 1 nuclei AB - This paper presents a statistical study of the host galaxies and environment for a sample of 27 "narrow line" Seyfert 1 (NLSy1) nuclei, based on a computer-aided search of companions in the Digitized Sky Survey. The sample includes all objects listed as NLSy1 in the catalog Veron-Cetty & Veron (8th edition) with redshift in the range 0.010 less than or equal to z less than or equal to 10.061 and Galactic latitude \b\ greater than or equal to 30 degrees. We compared the environments of NLSy1's with those of Seyfert 1 and Seyfert 2 galaxies using the method and the Seyfert samples employed in 1999 by Dultzin-Hacyan et al. The frequency of "physical" companions was measured within a search radius equal to 3 times the diameter D-S of each NLSy1 and up to a projected linear distance of approximate to 100 kpc. No statistical difference was found between the environments of NLSy1's and those of Seyfert 1 galaxies. Our results further suggest that NLSy1 hosts may show fewer companions and may be preferentially farther away from bright companion galaxies than normal galaxies with similar morphological type, diameter, and redshift distribution. The results for host galaxies and environments help to disprove the hypothesis that NLSy1 objects have characteristics similar to those of Seyfert 2 galaxies : whereas Seyfert 2 galaxies show a highly significant excess of bright companions, Seyfert 1's and NLSy1's do not. The morphological distribution of NLSy1's and Seyfert 1 objects is similar, but NLSy1 nuclei are hosted in galaxies smaller than Seyfert 1 and nonactive galaxies, to a statistical confidence level of 95%. These results support the interpretation of NLSy1 nuclei (suggested by X-ray observations) as Seyfert 1 nuclei with higher Eddington ratio, since smaller diameter galaxies may host central black holes of lower mass MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000166939700010 L2 - galaxies : active;galaxies : interactions;galaxies : nuclei;galaxies : Seyfert;galaxies : statistics;VARIABILITY; SEARCH; CCD SO - Astronomical Journal 2001 ;121(2):702-709 3382 UI - 11667 AU - Krueger GRF AU - Koch B AU - Hoffmann A AU - Rojo J AU - Brandt ME AU - Wang GY AU - Buja LM AD - Univ Texas, Sch Med, Dept Pathol & Lab Med, Houston, TX 77030, USAUniv Cologne, Immunopathol Lab, D-50924 Cologne, GermanyPractice Internal Med, Clin Immunol & Rheumatol, Cologne, GermanyHosp Gen Mexico City, Banco Sangre, Mexico City 06726, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 06726, DF, MexicoUniv Texas, Hlth Sci Ctr, Sch Hlth Informat Sci, Neurosignal Anal Lab, Houston, TX 77030, USAKrueger, GRF, Univ Texas, Sch Med, Dept Pathol & Lab Med, 6431 Fannin St,MSB 2-246, Houston, TX 77030 USA TI - Dynamics of chronic active herpesvirus-6 infection in patients with chronic fatigue syndrome: Data acquisition for computer modeling AB - Ten adult patients with persistent active HHV-6 variant A infection and clinical chronic fatigue syndrome (CFS) were studied over a period of 24 months after initial clinical diagnosis, CFS was diagnosed according to HIP-revised CDC-criteria as defined by the CFS Expert Advisory Group to the German Federal Ministry of Health in 1994. Changes in HHV-6 antibody titer, viral DNA load, peripheral blood T lymphocytes and subpopulations, as well as CD4/CD8 cell ratio and cell death (apoptosis) were monitored. Data were collected for comparison with respective changes in acute HHV-6 infection and as a basis for future computer simulation studies. The results showed variable but slightly elevated members of HHV-6 DNA copies in the blood of patients with CFS, while PBL (peripheral blood lymphocyte) apoptosis rates were clearly increased. CD4/CD8 cell ratios varied from below 1 up to values as seen in autoimmune disorders. Contrary to acute HHV-6 infection, T lymphocytes do not exhibit the usual response to HHV-6, that is elevation of mature and immature populations suggesting a certain degree of unresponsiveness. The data suggest that persistent low-dose stimulation by HHV-6 may favor imbalanced immune response rather than overt immune deficiency. This hypothesis requires confirmation through additional functional studies MH - Germany MH - Mexico|Distrito Federal MH - USA PB - ATHENS: INT INST ANTICANCER RESEARCH RP - NOT IN FILE U3 - TC 6 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0258-851X UR - ISI:000174113200003 L2 - chronic fatigue syndrome;HHV-6;IMMUNOLOGICAL PARAMETERS; APOPTOSIS; HUMAN-HERPESVIRUS-6; RESPONSES; HHV-6 SO - In Vivo 2001 ;15(6):461-465 3383 UI - 13141 AU - Krueger GRF AU - Huetter ML AU - Rojo J AU - Romero M AU - Cruz-Ortiz H AD - Univ Texas, Sch Med, Dept Pathol & Lab Med, Houston, TX 77030, USAUniv Cologne, Sch Med, Immunopathol Lab, D-50924 Cologne, GermanyUniv Nacl Autonoma Mexico, Hosp Gen Mexico, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Pathol, Mexico City 04510, DF, MexicoKrueger, GRF, Univ Texas, Sch Med, Dept Pathol & Lab Med, 6431 Fannin,MSB 2-246, Houston, TX 77030 USA TI - Human herpesviruses HHV-4 (EBV) and HHV-6 in Hodgkin's and Kikuchi's diseases and their relation to proliferation and apoptosis AB - Background: Human herpesviruses types 4 and 6 (EBV, HHV-6) are frequently found in Hodgkin's disease (HD) and - to a certain extent - in Kikuchi-Fujimoto's disease (KFD). Both viruses are apparently related to proliferative and/or apoptotic processes as represented by HD or KFD respectively. Objective: To correlate frequency and location of antigen- and DNA expression of both viruses in HD and KFD tissue sections in relation to markers for cell proliferation and apoptosis. Study Design. Archival 4,mph node biopsies from 103 patients with HD and 14 KFD patients were investigated immunohistologically for viral antigen expression (EBV LMP- 1: HHV-6 pl 10/60), Ki67/PCNR, marker for proliferation (MIBI)/ p53 and WAF1 for apoptosis. Viral DNA was shown by in situ hybridization. Apoptosis was determined by ISEL and TUNEL techniques. Results. HD is frequently infected by both EBV and HHV-6 while KFD tends to be infected only by HHV-6 EBV in HD is present in HD cells and in Reed-Sternberg cells (HD/RS cells), HHV-6 preferentially, in lymphocytes and in histiocytes in both HD and in KFD. Proliferation marker Ki67 is found in lymphocytes and histiocytes of both diseases and in HD and RS cells in HD. Apoptosis is demonstrated in lymphocytes and histiocytes preferentially in KFD and to a lesser extent also in HD. Conclusion: Although EBV and HHV-6 may not be openly oncogenic in HD and KFD, they may well influence the course of the disease. Dual infection in HD appears to support proliferative processes, i.e. a predominance of EBV effects. Single infection with HHV-6 in KFD instead appears to favor an apoptotic course. These effects are - according to the literature-possibly cytokine-mediated MH - Germany MH - Mexico|Distrito Federal MH - USA PB - ATHENS: INT INST ANTICANCER RESEARCH RP - NOT IN FILE U3 - TC 21 U4 - Oncology U5 - J;Article AV - English IS - 0250-7005 UR - ISI:000170276700010 L2 - Epstein-Barr virus (EBV);human Herpesvirus-6 (HHV-6);Hodgkin's disease;Kikuchi's disease;apoptosis proliferation;EPSTEIN-BARR-VIRUS; REED-STERNBERG CELLS; HISTIOCYTIC NECROTIZING LYMPHADENITIS; APROLIFERATIVE DISEASES; EXPRESSION; IDENTIFICATION; INTERLEUKIN-2; ANTIBODIES; SEQUENCES; ANTIGENS SO - Anticancer Research 2001 ;21(3C):2155-2161 3384 UI - 14279 AU - Kruijver FPM AU - Fernandez-Guasti A AU - Fodor M AU - Kraan EM AU - Swaab DF AD - Netherlands Inst Brain Res, Grad Sch Neurosci, NL-1105 AZ Amsterdam, NetherlandsCINVESTAV, Dept Pharmacobiol, Mexico City 14000, DF, MexicoIMP, Div Invest Neurociencias, Mexico City, DF, MexicoFree Univ Amsterdam, Dept Pediat, Res Inst Endocrinol Reprod & Metab, Amsterdam, NetherlandsKruijver, FPM, Netherlands Inst Brain Res, Grad Sch Neurosci, Meibergdreef 33, NL-1105 AZ Amsterdam, Netherlands TI - Sex differences in androgen receptors of the human mamillary bodies are related to endocrine status rather than to sexual orientation or transsexuality AB - In a previous study we found androgen receptor (AR) sex differences in several regions throughout the human hypothalamus. Generally, men had stronger nuclear AR immunoreactivity (AR-ir) than women. The strongest nuclear labeling was found in the caudal hypothalamus in the mamillary body complex (MBC), which is known to be involved in aspects of cognition and sexual behavior. The present study was carried out to investigate whether the sex difference in AR-ir of the MBC is related to sexual orientation or gender identity (i.e. the feeling of being male or female) or to circulating levels of androgens, as nuclear AR-ir is known to be up-regulated by androgens. Therefore, we studied the MBC in postmortem brain material from the following groups: young heterosexual men, young homosexual men, aged heterosexual castrated and noncastrated men, castrated and noncastrated transsexuals, young heterosexual women, and a young virilized woman. Nuclear AR-ir did not differ significantly between heterosexual and homosexual men, but was significantly stronger than that in women. A female-like pattern of AR-ir (i.e. no to weak nuclear staining) was observed in 26- to 53-yr-old castrated male-to-female transsexuals and in old castrated and noncastrated men, 67-87 yr of age. In analogy with animal studies showing strong activational effects of androgens on nuclear AR-ir, the present data suggest that nuclear AR-ir in the human MBC is dependent on the presence or absence of circulating levels of androgen. The group data were, moreover, supported by the fact that a male-like AR-ir (i.e. intense nuclear AR-ir) was found in a 36-yr-old bisexual noncastrated male-to-female transsexual and in a heterosexual virilized woman, 46 yr of age, with high levels of circulating testosterone. In conclusion, the sexually dimorphic AR-ir in the MBC seemed to be clearly related to circulating levels of androgens and not to sexual orientation or gender identity. The functional implications of these alterations are discussed in relation to reproduction, cognition, and neuroprotection MH - Mexico|Distrito Federal MH - Netherlands PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 38 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000167004900062 L2 - ALZHEIMERS-DISEASE; HUMAN-BRAIN; SUPRACHIASMATIC NUCLEUS; HUMAN HYPOTHALAMUS; MAMMILLARY BODIES; ANTERIOR COMMISSURE; NERVOUS-SYSTEM; SYRIAN-HAMSTER; HUMAN TISSUES; ADULT MALE SO - Journal of Clinical Endocrinology and Metabolism 2001 ;86(2):818-827 3385 UI - 14095 AU - Kucharczyk W AU - Alvarado FLC AU - Gorski P AU - Ledzion R AD - Lodz Tech Univ, Inst Phys, PL-93005 Lodz, PolandInst Politecn Nacl, Escuela Super Fis & Matemat, Edificio UPLAM 6, Mexico City 07738, DF, MexicoKucharczyk, W, Lodz Tech Univ, Inst Phys, Wolczanska 219, PL-93005 Lodz, Poland TI - The effective bond charge in alkali halides - another manifestation of the crystals ionicity AB - The effective bond charge q(eff), as determined from experimental values of the third-order optical susceptibility in alkali halides, is analyzed. The correlations of q(eff) with the ratio of the cation to anion radius, lattice constant and Szigeti effective charge are taken into account. The relationships between q(eff) and other parameters describing the ionicity show that the magnitude of q(eff) can be considered as one more parameter related to the ionicity of the crystals. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000167511100021 L2 - inorganic compounds;dielectric properties;optical properties;NONLINEAR-REFRACTIVE-INDEX; ELECTRONIC DIELECTRIC-CONSTANTS; OPTICAL SUSCEPTIBILITIES; COEFFICIENT; SIZES; MODEL SO - Journal of Physics and Chemistry of Solids 2001 ;62(4):761-765 3386 UI - 12324 AU - Kumar GA AU - Unnikrishnan NV AD - Mahatma Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, Kerala, IndiaCtr Invest Opt, Opt Mat Grp, Leon 37000, Gto, MexicoUnnikrishnan, NV, Mahatma Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, Kerala, India TI - Energy transfer and optical gain studies of FDS: RhB dye mixture investigated under cw laser excitation AB - Radiative and non-radiative (Forster type) energy transfer processes in a dye mixture of FDS and Rh B in methanol under cw Ar ion laser excitation were investigated for fixed donor concentration and varying acceptor concentration. It is found that most of the pump power absorbed by FDS is transferred to Rh B as a useful pump power. Transfer probability (P-DA), transfer efficiency both radiative (eta (R)) and non-radiative (eta (NR)) and optical gain (G) of the system were studied for various pump powers. The gain characteristics of Rh B are found to alter due to the change in the effective fluorescence lifetime caused by energy transfer reaction. Theoretical calculations were also done to find the total transfer efficiency (eta (T)) at various acceptor concentrations to identify the appropriate energy transfer mechanism responsible for gain enhancement in Rh B. Both radiative and non-radiative transfer processes are taken into consideration in all the calculations. Various energy transfer parameters viz. radiative rate constant (K-R), non-radiative rate constant (K-NR), critical concentration (C-0), critical radius (R-0) and half quenching concentration ([A](1/2)) are calculated by using the Stern-Volmer plots and concentration dependence of radiative and non-radiative transfer efficiencies. Concentration and pump power dependence of the peak gain and lasing wavelengths of the energy transfer dye lasers (ETDL) have also been studied. The experimental results show that the dominant mechanism responsible for the efficient excitation transfer in this mixture is of radiative nature, whereas the long range dipole-dipole (d-d) interaction (Forster type) is comparatively smaller. (C) 2001 Published by Elsevier Science B.V MH - India MH - Mexico|Guanajuato PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1010-6030 UR - ISI:000172314000006 L2 - energy transfers;Forster-Dexter theory;Stern-Volmer plot;optical gain;CONCENTRATION-DEPENDENCE; DONOR SO - Journal of Photochemistry and Photobiology A-Chemistry 2001 ;144(2-3):107-117 3387 UI - 12579 AU - Kunchur MN AU - Ivlev BI AU - Knight JM AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoKunchur, MN, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA TI - Steps in the negative-differential-conductivity regime of a superconductor AB - Current-voltage characteristics were measured in the mixed state of Y1Ba2Cu3O7-delta superconducting films in the regime where flux flow becomes unstable and the differential conductivity dj/dE becomes negative. Under conditions where its negative slope is steep, the j(E) curve develops a pronounced stair-caselike pattern. We attribute the steps in j(E) to the formation of a dynamical phase consisting of the successive nucleation of quantized distortions in the local vortex velocity and flux distribution within the moving flux matter MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000171708900042 L2 - HIGH-TEMPERATURE SUPERCONDUCTORS; HIGH-CURRENT DENSITIES; UPPER CRITICAL-FIELD; FLUX-FLOW; ELECTRONIC INSTABILITY; NORMAL-STATE; YBA2CU3O7-DELTA; FILMS; VELOCITIES; RESISTIVITY SO - Physical Review Letters 2001 ;8717(17): 3388 UI - 11966 AU - Kung L AU - Batiuk TD AU - Palomo-Pinon S AU - Noujaim J AU - Helms LMH AU - Halloran PF AD - Univ Alberta, Dept Med, Edmonton, AB T6G 2S2, CanadaUniv Alberta, Dept Med Microbiol & Immunol, Edmonton, AB T6G 2S2, CanadaIndiana Univ, Sch Med, Indianapolis, IN, USAHosp Med Ctr Siglo XXI, IMMS, Dept Nephrol, Mexico City, DF, MexicoHalloran, PF, Univ Alberta, Dept Med, Edmonton, AB T6G 2S2, Canada TI - Tissue distribution of calcineurin and its sensitivity to inhibition by cyclosporine AB - The immunosuppressive activity of cyclosporine is mediated by inhibiting calcineurin phosphatase. However, calcineurin is widely distributed in other tissues. We examined the degree of calcineurin inhibition by cyclosporine in various tissues. In vitro, the cyclosporine concentration inhibiting 50% (IC50) of calcineurin was similar to10 ng/mL in human and mouse leukocytes suspensions. In vitro and in vivo IC50s of cyclosporine in homogenates of mouse kidney, heart, liver, testis, and spleen were also comparable (9-48 ng/mL). The maximum calcineurin inhibition by cyclosporine varied, from 83 to 95% of calcineurin activity in spleen, kidney, liver, and testis to 60% in heart and only 10% in brain. Maximum calcineurin inhibition was increased by the addition of cyclophilin A, indicating that cyclophilin concentrations were limiting in some tissues, at least in this assay. Western analysis of mouse tissues showed significantly less cyclophilin in heart than other tissues. Cyclosporine concentrations per weight of tissue protein were highest in kidney and liver and lowest in brain and testis after oral dosing, with intermediate levels in spleen, heart, and whole blood. Thus each cyclosporine dose produces rapid and widespread inhibition of calcineurin in tissues, with differences in total susceptibility of each tissue MH - Canada MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 16 U4 - Surgery;Transplantation U5 - J;Article AV - English IS - 1600-6135 UR - ISI:000173467300007 L2 - calcineurin;cyclosporine;distribution;MICROTUBULE-ASSOCIATED PROTEIN-2; IN-VIVO; CELLULAR-DISTRIBUTION; T-LYMPHOCYTES; TAU-FACTOR; NF-AT; CYCLOPHILIN; ACTIVATION; ISOFORMS; COMPLEX SO - American Journal of Transplantation 2001 ;1(4):325-333 3389 UI - 12583 AU - Kuntsevich BF AU - Pisarchik AN AD - Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, ByelarusAC, Ctr Invest Opt, Leon 37150, Gto, MexicoKuntsevich, BF, Natl Acad Sci Belarus, BI Stepanov Phys Inst, Ave F Skaryna 68, Minsk 220072, Byelarus TI - Synchronization effects in a dual-wavelength class-B laser with modulated losses AB - Different types of synchronization: in-phase, antiphase, phase, and lag synchronization, as well as amplitude death have been found theoretically in a dual-wavelength class-B laser with modulated losses in one of the channels. Depending on the laser parameters, oscillations in master and slave channels can be either completely or-partially synchronized. The conditions for the dual-wavelength regime have been established. The analysis has been performed on the basis of transfer functions of the master and slave channels MH - Byelarus MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171649100067 L2 - LIMIT-CYCLE OSCILLATORS; COUPLED NONLINEAR OSCILLATORS; SEMICONDUCTOR-LASERS; SECURE COMMUNICATIONS; CHAOTIC OSCILLATORS; MICROCHIP LASERS; AMPLITUDE DEATH; PHASE; CO2-LASER; SYSTEMS SO - Physical Review e 2001 ;6404(4): 3390 UI - 14083 AU - Kuo JC AU - Elliot D AU - Luna-Melo J AU - Perez JBD AD - Bechtel, IPSI, Houston, TX, USAPetr Mexicanos, Villahermosa, MexicoKuo, JC, Bechtel, IPSI, Houston, TX, USA TI - World's largest N-2-generation plant starts up for Cantarell reservoir pressure maintenance MH - Mexico|Tabasco MH - USA PB - TULSA: PENNWELL PUBL CO ENERGY GROUP RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels;Engineering, Petroleum U5 - J;Article AV - English IS - 0030-1388 UR - ISI:000167495100013 SO - Oil & Gas Journal 2001 ;99(11):41-47 3391 UI - 13226 AU - Kuppermann BD AU - Thomas EL AU - Quiroz-Mercado H AU - Graue-Weichers F AU - Byrne SF AU - de la Fuente-Torres M AU - Ochoa-Contrera D AU - Calvillo PN AU - Grillone LR AD - Univ Calif Irvine, Dept Ophthalmol, Irvine, CA, USARetina Vitreous Assoc Med GRP, Los Angeles, CA, USALa Ceguera Hosp, Mexico City, DF, MexicoConde Valenciana, Mexico City, DF, MexicoByrne Co, Mars Hills, NC, USAISTA Pharmaceut, Irvine, CA, USA TI - Vitrase (R)(hyaluronidase for intravitreal injection) induction of posterior vitreous detachment: a randomized, controlled pilot study in patients with diabetic retinopathy MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392103935 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S741-S741 3392 UI - 14277 AU - Kurdyumov VN AU - Linan A AD - ITVer, Dept Met Mecan, Veracruz 91868, MexicoUniv Politecn Madrid, ETS Ingn Aeronaut, E-28040 Madrid, SpainKurdyumov, VN, ITVer, Dept Met Mecan, Veracruz 91868, Mexico TI - Free and forced convection around line sources of heat and heated cylinders in porous media AB - An analysis is presented for the steady, two-dimensional, free convection around line sources of heat and heated cylinders in unbounded saturated porous media. It is extended to account also for the effects of forced convection. The study is based on the Boussinesq equations, with the velocities calculated using Darcy's law. The analysis begins with the non-dimensional formulation and numerical solution of the problem of pure free convection around a line source of heat. When this analysis is extended to include the effects of forced convection, two parameters appear in the non-dimensional formulation: the non-dimensional value, V-infinity, of the free-stream velocity and its angle gamma of inclination with respect to the vertical. We first describe the asymptotic form of the solution for large and small values of the distance to the source. The far-field description, which is also applicable to the flow around heated cylinders, is needed to facilitate the numerical solution of the problem. It includes a thermal wake, aligned with the free stream, and an outer irrotational flow with a sink and a vortex at the line source. The temperature distribution near the source involves a constant A(0)(V-infinity, gamma), to be calculated with the numerical solution of the complete problem, which is used in the evaluation of the heat transfer from heated cylinders when the Rayleigh and Peclet numbers are small compared with unity. In this case we find an inner region where heat conduction is dominant, and an outer region where the cylinder appears as a line source of heat. The asymptotic analysis is complemented with the numerical solution of the general problem for circular cylinders with a wide range of Rayleigh numbers and some representative values of V-infinity and gamma. We give correlations for the Nusselt number in the limiting cases of pure free convection and pure forced convection MH - Mexico|Veracruz MH - Spain PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000167000200014 L2 - SMALL GRASHOF NUMBERS; HORIZONTAL CYLINDER; MIXED CONVECTION; NATURAL-CONVECTION; SPHERE SO - Journal of Fluid Mechanics 2001 ;427():389-409 3393 UI - 12448 AU - Kurtev R AU - Georgiev L AU - Borissova J AU - Li WD AU - Filippenko AV AU - Treffers RR AD - Univ Sofia, Dept Astron, Sofia 1164, BulgariaIsaac Newton Inst Chile, Bulgarian Branch, Sofia 1164, BulgariaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoBulgarian Acad Sci, Inst Astron, BU-1784 Sofia, BulgariaIsaac Newton Inst Chile, Bulgarian Branch, Sofia 1784, BulgariaUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAKurtev, R, Univ Sofia, Dept Astron, Sofia 1164, Bulgaria TI - The first known Mira-type variable star in IC 1613 AB - King et al. (1999) discovered Nova 1999 in IC 1613 at the Lick Observatory. Both Fugazza et al. (2000) and Borissova et al. (2000) questioned this classification, because they were able to detect the star on images obtained in previous years. In infrared frames taken on Oct. 15, 1998, Nova 1999 has (J - K) = 1.14 and K = 14.69 mag. Our light curve study, based primarily on 92 unfiltered Lick images, suggested that the object could be a Mira-type variable with a period of 640.7 days. This period is very close to that obtained by Fugazza et al. (2000) - 631 days. The star is overluminous with respect to the period-luminosity (PL) relation derived by Feast et al. (1989) for Mira variables in the LMC. At longer periods (P > 400 days), many LMC Miras show such behavior and the PL relation appears to break down. It is possible that the situation in IC 1613 is similar. An optical spectrum obtained with the Keck-II telescope shows features typical of M3Ie or M3IIIe stars. We conclude that the star is a normal long-period M-type Mira variable, the first such star confirmed in IC 1613 MH - Bulgaria MH - Mexico|Distrito Federal MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171779800011 L2 - galaxies : individual : IC 1613;galaxies : Local Group;galaxies : stellar content;stars : variables : general;LONG-PERIOD VARIABLES; BVRI CCD PHOTOMETRY; NEARBY GALAXIES; COOL COMPONENTS; SYMBIOTIC STARS; STELLAR CONTENT; LIGHT CURVES; IC-1613; SPECTROPHOTOMETRY; CLASSIFICATION SO - Astronomy & Astrophysics 2001 ;378(2):449-454 3394 UI - 10990 AU - Kurtz S AU - Hofner P AU - Vargas C AU - az-Merced W AD - Univ Nacl Autonoma Mexico, Morelia 58089, Michoacan, Mexico. Univ Puerto Rico, Rio Piedras, PR 00931, USA TI - High resolution radio continuum observations of high mass star formation regions AB - We present high angular resolution centimeter and millimeter continuum observations of several galactic massive star formation regions. Using calibration techniques pioneered at the Very Large Array, we are able to obtain high quality images even under adverse conditions of phase stability. Techniques such as these will be essential if future millimeter arrays are to obtain high quality and high precision images. We provide a current summary of our on-going survey, and present images and a brief discussion of several of the more intriguing sources MH - Mexico|Michoacan MH - USA T3 - GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONSIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBU43Z AV - English IS - 0074-1809 UR - ISI:000175998000093 SO - 2001 ;(205):280-281 3395 UI - 13548 AU - Kushnirenko A AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - He KL AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VE AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Li YS AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkonrcuklu S AU - Penzo A AU - Petrenko SV AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zukanovich-Funchal R AD - Carnegie Mellon Univ, Pittsburgh, PA 15213, USABall State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, TurkeyCtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Ramat Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Rome La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyKushnirenko, A, Carnegie Mellon Univ, Pittsburgh, PA 15213, USA TI - Precision measurements of the Lambda(+)(c) and D-0 lifetimes AB - We report new precision measurements of the lifetimes of the A(c)(+) and D-0 from SELEX, the charm hadroproduction experiment at Fermilab. Based upon 1630 A(c)(+) and 10210 D-0 decays we observe lifetimes of tau [A(c)(+)] = 198.1 +/- 7.0 +/- 5.6 fs and tau [D-0] = 407.9 +/- 6.0 +/- 4.3 fs MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000169121500009 L2 - MESON LIFETIMES; DECAYS SO - Physical Review Letters 2001 ;86(23):5243-5246 3396 UI - 12323 AU - Kushwaha MS AU - Vasilopoulos P AD - Univ Puebla, Inst Phys, Puebla 72570, MexicoConcordia Univ, Dept Phys, Montreal, PQ H3G 1M8, CanadaKushwaha, MS, Concordia Univ, Dept Phys, 1455 Maisonneuve Blvd W, Montreal, PQ H3G 1M8, Canada TI - Current instability in field-effect transistors: influence of magnetic field and collisions AB - A theoretical investigation is made of the plasma-wave instability mechanism in a two-dimensional (2D) electron fluid in a field-effect transistor (FET) in the presence of a perpendicular magnetic field. The influence of electron collisions with impurities and/or phonons is also taken into account. The 2D electron fluid in the FET channel is treated within the framework of hydrodynamics. The treatment is valid for a nondegenerate electron fluid in which the mean free path for interelectronic collisions is much smaller than the device length and the mean free path due to impurities and/or phonons. It is shown that a relatively low direct current should be. unstable because of magnetoplasmawave amplification due to the reflection of the Wave from the device boundaries. The role of an applied magnetic field is additive: the greater the magnetic field, the larger the wave increment. In that sense an applied magnetic field may be used to compensate (or overcome) the subtractive role played by collisions on plasma-wave generation. Such a ballistic FET is promising for the generation of tunable electromagnetic radiation in the terahertz frequency range MH - Canada MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000172301500026 L2 - BALLISTIC TRANSPORT; MECHANISM; FLUID; DC SO - Journal of Physics-Condensed Matter 2001 ;13(44):10105-10116 3397 UI - 13021 AU - Kutzbach AG AU - Gonzalez JC AD - Francisco Marroquin Univ, Sch Med, Guatemala City, GuatemalaHosp Gen Mexico City, Mexico City, DF, MexicoKutzbach, AG, Francisco Marroquin Univ, Sch Med, Guatemala City, Guatemala TI - A report from the Mexican Congress of Rheumatology MH - Guatemala MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Article AV - English IS - 1076-1608 UR - ISI:000170621200015 SO - Jcr-Journal of Clinical Rheumatology 2001 ;7(4):273-274 3398 UI - 12638 AU - Kuzin EA AU - Escamilla BI AU - Garcia-Gomez DE AU - Haus JW AD - Inst Nacl Astrofis Opt & elect, Puebla, MexicoUniv Dayton, Electroopt Program, Dayton, OH 45469, USAKuzin, EA, Inst Nacl Astrofis Opt & elect, AP 51 & 216, Puebla, Mexico TI - Fiber laser mode locked by a Sagnac interferometer with nonlinear polarization rotation AB - We describe a new fiber laser configuration based on a nonlinear optical loop mirror with a symmetrical coupler, a quarter-wave retarder, and highly twisted, birefringent, fiber in the loop. The nonlinear optical loop mirror configuration operates by nonlinear polarization rotation. We have achieved stable generation of subpicosecond pulses with milliwatts of average output power, (C) 2001 Optical Society of America MH - Mexico|Puebla MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000171551500009 SO - Optics Letters 2001 ;26(20):1559-1561 3399 UI - 13158 AU - Kuzin EA AU - Ayala JME AU - Escamilla BL AU - Haus JW AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Dayton, Electroopt Program, Dayton, OH 45469, USAHaus, JW, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla 72000, Mexico TI - Measurements of beat length in short low-birefringence fibers AB - We describe a new experimental method of determining low birefringence in fibers, based on adjusting the fiber twist in a fiber-optic loop mirror. The method allows simple birefringence measurement in fibers with beat length within the range 0.05-100 m. (C) 2001 Optical Society of America MH - Mexico|Puebla MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000170140900006 L2 - SINGLE-MODE FIBERS; POLARIZATION SO - Optics Letters 2001 ;26(15):1134-1136 3400 UI - 13359 AU - Kuzin EA AU - Korneev N AU - Haus JW AU - Ibarra-Escamilla B AD - Inst Nacl Astrofis Opt & Electron, Puebla, MexicoUniv Dayton, Elect Opt Program, Dayton, OH 45469, USAKuzin, EA, Inst Nacl Astrofis Opt & Electron, AP 51 & 216, Puebla, Mexico TI - Theory of nonlinear loop mirrors with twisted low-birefringence fiber AB - We analyze propagation in a nonlinear, birefringent optical fiber with twist. The results show that the polarization evolution is periodic, and they are applied to the analysis of a Sagnac interferometer. The period is calculated by using perturbation theory, and we find a condition for it to be independent of the initial polarization state. We derive a simplified set of equations to describe the nonlinear evolution of the phase. We give a useful way to visualize the behavior of the nonlinear optical loop mirror (as a function of birefringence, twist, length, and input polarization) in terms of the Poincare sphere. (C) 2001 Optical Society of America MH - Mexico|Puebla MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000169593200005 L2 - POLARIZATION SENSITIVITY; INSTABILITY; ROTATION SO - Journal of the Optical Society of America B-Optical Physics 2001 ;18(7):919-925 3401 UI - 12596 AU - Lafortune S AU - Tremblay S AU - Winternitz P AD - Univ Arizona, Dept Math, Tucson, AZ 85721, USAUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Dept Math & Stat, Montreal, PQ H3C 3J7, CanadaCIF, Cuernavaca, Morelos, MexicoCzech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech RepublicLafortune, S, Univ Arizona, Dept Math, POB 210089, Tucson, AZ 85721, USA TI - Symmetry classification of diatomic molecular chains AB - A symmetry classification of possible interactions in a diatomic molecular chain is provided. For nonlinear interactions the group of Lie point transformations, leaving the lattice invariant and taking solutions into solutions, is at most five-dimensional. An example is considered in which subgroups of the symmetry group are used to reduce the dynamical differential-difference equations to purely difference ones. (C) 2001 American Institute of Physics MH - Canada MH - Czech Republic MH - Mexico|Morelos MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000171629200022 L2 - DISCRETE DYNAMICAL-SYSTEMS; EQUATIONS SO - Journal of Mathematical Physics 2001 ;42(11):5341-5357 3402 UI - 12125 AU - Lafuente MT AU - Zacarias L AU - Martinez-Tellez MA AU - Sanchez-Ballesta MT AU - Dupille E AD - CSIC, Inst Agroquim & Tecnol Alimentos, Valencia 46100, SpainCIAD, Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoLafuente, MT, CSIC, Inst Agroquim & Tecnol Alimentos, Apartado Correos 73, Valencia 46100, Spain TI - Phenylalanine ammonia-lyase as related to ethylene in the development of chilling symptoms during cold storage of citrus fruits AB - Low-temperature, nonfreezing, storage induces pitting and necrosis in the flavedo tissue of chilling susceptible citrus fruits. In this study the role of ethylene and phenylalanine ammonia-lyase (PAL; EC 4.3.1.5) in the cold-induced citrus peel damage has been investigated. It has been shown that increasing PAL activity by applying ethylene at a nonchilling temperature did not cause fruit damage or reduce the incidence of this peel disorder when fruits were subsequently held at a chilling temperature (2 degreesC). The cold-induced peel damage was enhanced by applying inhibitors of PAL activity and ethylene synthesis and action. These results indicate that the induction of PAL and ethylene during fruit cold storage, but not before, plays a role in reducing the development of chilling symptoms. The cold-induced PAL activity was reduced by inhibitors of ethylene production, but inhibitors of ethylene action exerted little effect on the activation of this enzyme. Therefore, the activation of PAL may be dependent on ethylene but also an independent cold signal apparently related to the cold-induced peel damage MH - Mexico|Sonora MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000172889600054 L2 - citrus;cold storage;chilling injury;ethylene;alpha-aminooxy-beta-phenylpropionic acid (AOPP);2-aminoethoxyvinylglycine (AVG);1-methylcyclopropene (1-MCP);phenylalanine ammonia-lyase (PAL);silver thiosulfate (STS);MANDARIN FRUITS; HIGHER-PLANTS; METABOLISM; INDUCTION; STRESS; 1-METHYLCYCLOPROPENE; BIOSYNTHESIS; SENSITIVITY; INHIBITION; TOLERANCE SO - Journal of Agricultural and Food Chemistry 2001 ;49(12):6020-6025 3403 UI - 12134 AU - Lambin EF AU - Turner BL AU - Geist HJ AU - Agbola SB AU - Angelsen A AU - Bruce JW AU - Coomes OT AU - Dirzo R AU - Fischer G AU - Folke C AU - George PS AU - Homewood K AU - Imbernon J AU - Leemans R AU - Li XB AU - Moran EF AU - Mortimore M AU - Ramakrishnan PS AU - Richards JF AU - Skanes H AU - Steffen W AU - Stone GD AU - Svedin U AU - Veldkamp TA AU - Vogel C AU - Xu JC AD - Univ Catholique Louvain, Dept Geog, B-1348 Louvain, BelgiumClark Univ, George Perkins Marsh Inst, Worcester, MA 01610, USAUniv Ibadan, Ctr Urban & Reg Planning, Ibadan, NigeriaAgr Univ Norway, Dept Econ & Social Sci, N-1432 As, NorwayUniv Wisconsin, Land Tenure Ctr, Madison, WI 53715, USAMcGill Univ, Dept Geog, Montreal, PQ H3A 2K6, CanadaUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoInt Inst Appl Syst Anal, A-2361 Laxenburg, AustriaUniv Stockholm, Dept Syst Ecol, S-10691 Stockholm, SwedenCtr Dev Studies, Trivandrum 695011, Kerala, IndiaUniv London Univ Coll, Dept Anthropol, London WC1E 6BT, EnglandCtr Cooperat Int Rech Agron Dev, F-34032 Montpellier, FranceNatl Inst Publ Hlth & Environm, Bur Environm & Nat Assessments, NL-3720 BA Bilthoven, NetherlandsChinese Acad Sci, Inst Geog, Beijing 100101, Peoples R ChinaIndiana Univ, Ctr Study Inst Populat & Environm Change, Bloomington, IN 47405, USADrylands Res, Crewkerne TA18 7LG, Somerset, EnglandJawaharlal Nehru Univ, Sch Environm Sci, New Delhi 110067, IndiaDuke Univ, Dept Hist, Durham, NC 27701, USAStockholm Univ, Dept Phys Geog, S-10691 Stockholm, SwedenRoyal Swedish Acad Sci, Int Geosphere Biosphere Programme, S-10405 Stockholm, SwedenWashington Univ, Dept Anthropol, St Louis, MO 63130, USASwedish Council Planning & Coordinat Res, S-10387 Stockholm, SwedenWageningen Univ Agr, Lab Soil Sci & Geol, NL-6700 AA Wageningen, NetherlandsUniv Witwatersrand, Dept Geog & Environm Studies, ZA-2050 Johannesburg, South AfricaChinese Acad Sci, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R ChinaLambin, EF, Univ Catholique Louvain, Dept Geog, Pl Louis Pasteur 3, B-1348 Louvain, Belgium TI - The causes of land-use and land-cover change: moving beyond the myths AB - Common understanding of the causes of land-use and land-cover change is dominated by simplifications which, in turn, underlie many environment-development policies. This article tracks some of the major myths on driving forces of land-cover change and proposes alternative pathways of change that are better supported by case study evidence. Cases reviewed support the conclusion that neither population nor poverty alone constitute the sole and major underlying causes of land-cover change worldwide. Rather, peoples' responses to economic opportunities, as mediated by institutional factors, drive land-cover changes. Opportunities andconstraints for new land uses are created by local as well as national markets and policies. Global forces become the main determinants of land-use change, as they amplify or attenuate local factors. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Austria MH - Belgium MH - Canada MH - United Kingdom MH - France MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Nigeria MH - Norway MH - Peoples R China MH - South Africa MH - Sweden MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 158 U4 - Environmental Sciences;Environmental Studies;Geography U5 - J;Article AV - English IS - 0959-3780 UR - ISI:000172796700002 L2 - BRAZILIAN AMAZON; DEFORESTATION; POPULATION; LESSONS; SUSTAINABILITY; BIODIVERSITY; CULTIVATION; ENVIRONMENT; ECOSYSTEMS; MANAGEMENT SO - Global Environmental Change-Human and Policy Dimensions 2001 ;11(4):261-269 3404 UI - 10989 AU - Lang CC AU - Goss WM AU - Rodriguez LF AD - Univ Massachusetts, Amherst, MA 01003, USA. Natl Radio Astron Observ, Socorro, NM 87801, USA. UNAM, Astron Inst, Morelia, Michoacan, Mexico TI - VLA detections of stellar winds arising from the galactic center Arches cluster AB - VLA detections have been made of 8 sources in the Galactic center Arches cluster. All sources have spectra consistent with those expected for stellar wind emission. Positional correspondence between these sources and near-infrared detections of mass-losing stars confirms that we are detecting stellar wind emission from Arches cluster members MH - Mexico|Michoacan MH - USA T3 - GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONSIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBU43Z AV - English IS - 0074-1809 UR - ISI:000175998000092 SO - 2001 ;(205):276-279 3405 UI - 13814 AU - Lang CC AU - Goss WM AU - Rodriguez LF AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUniv Calif Los Angeles, Div Astron, Los Angeles, CA 90095, USAUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoLang, CC, Univ Massachusetts, Astron Program, Lederle Grad Res Tower B-517O, Amherst, MA 01003 USA TI - Very large array detection of the ionized stellar winds arising from massive stars in the Galactic center arches cluster AB - The Galactic center Arches stellar cluster, detected and studied until now only in the near-infrared, is comprised of at least 100 massive (M-star greater than or equal to 20 M.) stars. Here we report the detection at centimeter wavelengths of radio continuum emission from eight radio sources associated with the cluster. Seven of these radio sources have rising spectral indices between 4.9 and 8.5 GHz and coincide spatially with the brightest stars in the cluster, as determined from JHK photometry and Br alpha and Br gamma spectroscopy. Our results confirm the presence of powerful ionized winds in these stars. The eighth radio source has a nonthermal spectrum, and its nature is yet unclear, but it could be associated with a lower mass young star in the cluster MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000168384700005 L2 - Galaxy : center;stars : mass loss;stars : winds, outflows;RADIO-EMISSION; SPECTRUM; HOT SO - Astrophysical Journal 2001 ;551(2):L143-L146 3406 UI - 13302 AU - Lang IG AU - Korovin LI AU - Contreras-Solorio DA AU - Pavlov ST AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Escuela Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaLang, IG, Russian Acad Sci, AF Ioffe Physicotech Inst, Politeknicheskaya Ul 26, St Petersburg 194021, Russia TI - Reflection and absorption of light by a quantum well in a strong magnetic field under pulsed irradiation AB - The interaction between a quantum well with a large number of equidistant excited electron energy levels and light is investigated. It is shown that nonsinusoidal oscillations occur in the transmitted, reflected, and absorbed energy fluxes under exposure of the quantum well to irradiation with light pulses. For long pulses whose length y(l)(-1) is one order of magnitude longer than the time (h) over bar/DeltaE (where DeltaE is the energy level spacing), the oscillation amplitude is small. In the case of narrow pulses when y(l)(-1) less than or equal to (h) over bar/DeltaE, the oscillation amplitude is comparable to the flux magnitudes. For very narrow pulses with Y-l(-1) << (h) over bar/DeltaE, the decaying echo of exciting pulse should be observed at the time intervals 2 pi(h) over bar/DeltaE. Symmetric and asymmetric pulses are considered. The theory is applicable to narrow quantum wells in a strong magnetic field when the equidistant levels correspond to electron-hole pairs with different Landau quantum numbers. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000169692100029 L2 - EXCITONS; DISPERSION SO - Physics of the Solid State 2001 ;43(6):1159-1168 3407 UI - 14468 AU - Lansiaux A AU - Laine W AU - Baldeyrou B AU - Mahieu C AU - Wattez N AU - Vezin H AU - Martinez FJ AU - Pineyro A AU - Bailly C AD - Ctr Oscar Lambret, ORCL, INSERM, U524, F-59045 Lille, FranceCtr Oscar Lambret, ORCL, Lab Pharmacol Antitumorale, F-59045 Lille, FranceENSCL, Chim Organ Phys Lab, CNRS, ESA 8009, F-59655 Villeneuve Dascq, FranceUniv Autonoma Nuevo Leon, Dept Med Interna, Monterrey 64460, NL, MexicoUniv Autonoma Nuevo Leon, Dept Farmacol & Toxicol, Fac Med, Monterrey 64460, NL, MexicoBailly, C, Ctr Oscar Lambret, ORCL, INSERM, U524, Pl Verdun, F-59045 Lille, France TI - DNA topoisomerase II inhibition by peroxisomicine A(1) and its radical metabolite induces apoptotic cell death of HL-60 and HL-60/MX2 human leukemia cells AB - Peroxisomicine A(1) (T-514) is a dimeric anthracenone first isolated from the plant Karwinskia humboldtiana. The compound presents a high and selective toxicity toward liver and skin cell cultures and is currently the subject of preclinical studies as an antitumor drug. To date, the molecular basis for its diverse biological effects remains poorly understood. To elucidate its mechanism of action, we studied its interaction with DNA and its effects on human DNA topoisomerases. Practically no interaction with DNA was detected. Peroxisomicine was found to inhibit topoisomerase II but not topoisomerase I. DNA relaxation and decatenation assays indicated that the drug interferes with the catalytic activity of topoisomerase II but does not stimulate DNA cleavage, in contrast to conventional topoisomerase poisons such as etoposide. Two human leukemia cell lines sensitive or resistant to mitoxantrone were used to assess the cytotoxicity of the toxin and its effect on the cell cycle. In both cases, peroxisomicine treatment was associated with a loss of cells from every phase of the cell cycle and was accompanied by a large increase in the sub-G1 region which is characteristic of apoptotic cells. The cell cycle changes were more pronounced with the sensitive HL-60 cells than with the resistant HL-60/MX2 cells (with reduced topoisomerase II activity), in agreement with the cytotoxicity measurements. Treatment of HL-60 cells with T-514 stimulated the cleavage of the poly(ADP-ribose) polymerase by intracellular proteases such as caspase-3. The cytometry and Western blot analyses reveal that peroxisomicine induces apoptosis in leukemia cells. In addition, we characterized a catabolite of peroxisomicine, named T-510R, in the form of a highly stable radical metabolite. The electron spin resonance and mass spectrometry data are consistent with the formation of an anionic semiquinonic radical. The oxidized product T-510R inhibits topoisomerase II with a reduced efficiency compared to the parent toxin and was found to be about 3-4 times less toxic to both the sensitive and resistant leukemia cell lines than T-514. Collectively, the results suggest that topoisomerase II inhibition plays a role in the cytotoxicity of the plant toxin peroxisomicine. Inhibition of topoisomerase II may serve as an inducing signal triggering the apoptotic cell death of leukemia cells exposed to the toxin. The dihydroxyanthracenone unit may represent a useful chemotype for the preparation of topoisomerase II-targeted anticancer agents MH - France MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Toxicology U5 - J;Article AV - English IS - 0893-228X UR - ISI:000166500400003 L2 - REDUCED EXPRESSION SO - Chemical Research in Toxicology 2001 ;14(1):16-24 3408 UI - 13271 AU - Lara KO AU - Godoy-Alcantar C AU - Rivera IL AU - Eliseev AV AU - Yatsimirsky AK AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoSUNY Buffalo, Dept Med Chem, Buffalo, NY 14260, USAUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoYatsimirsky, AK, Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Complexation of dicarboxylates and phosphates by a semisynthetic alkaloid-based cyclophane in water AB - Dicationic N,N-dibenzylated cyclophane-type derivative 1 of a bisisoquinoline macrocyclic alkaloid, S,S-(+)-tetrandrine, was prepared and characterized. In aqueous solution 1 undergoes dimerization, which was studied by the concentration dependence of its H-1 NMR signals. The salt effect on the dimerization constant was analyzed by using different versions of Debye-Huckel-type equations. H-1 NMR titration of 1 by 10 dicarboxylate anions of different structures revealed strong peak binding selectivity for succinate in the series of alpha,omega -dicarboxylates, Aromatic carboxylates have larger binding constants and for o-phthalate the formation of both 1:1 and 1:2 host-guest complexes is observed. Binding of nucleotides (AMP, ADP and ATP) to 1 is surprisingly insensitive to the guest charge, indicating a major contribution of stacking interactions of the nucleobase with 1. Copyright (C) 2001 John Wiley & Sons, Ltd MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0894-3230 UR - ISI:000169911200010 L2 - complexation;dicarboxylates;phosphates;alkalord-based cyclophane;HYDROGEN-BONDING RECEPTORS; MOLECULAR RECOGNITION; CARBOXYLATE ANIONS; AQUEOUS-SOLUTION; PROTIC SOLVENTS; BIOGENIC-AMINES; HOST COMPOUNDS; BINDING; POLYAMINES; STABILITY SO - Journal of Physical Organic Chemistry 2001 ;14(7):453-462 3409 UI - 12501 AU - Lara M AU - Ortega E AU - Pecht I AU - Pfeiffer JR AU - Martinez AM AU - Lee RJ AU - Surviladze Z AU - Wilson BS AU - Oliver JM AD - Univ Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoWeizmann Inst Sci, Dept Chem Immunol, IL-76100 Rehovot, IsraelUniv New Mexico, Sch Med, Dept Pathol, Albuquerque, NM 87131, USAUniv New Mexico, Sch Med, Ctr Canc, Albuquerque, NM 87131, USAOrtega, E, Univ Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Ap Postal 70228,Cd Univ, Mexico City 04510, DF, Mexico TI - Overcoming the signaling defect of Lyn-sequestering, signal-curtailing Fc epsilon RI dimers: Aggregated dimers can dissociate from Lyn and form signaling complexes with Syk AB - Clustering the tetrameric (alpha beta gamma (2)) IgE receptor, Fe epsilon RI, on basophils and mast cells activates the Src-family tyrosine kinase, Lyn, which phosphorylates Fc epsilon RI beta and gamma subunit tyrosines, creating binding sites for the recruitment and activation of Syk. We reported previously that Fc epsilon RI dimers formed by a particular anti-Fe epsilon RI alpha mAb (H10) initiate signaling through Lyn activation and Fc epsilon ERI subunit phosphorylation, but cause only modest activation of Syk and little Ca2+ mobilization and secretion. Curtailed signaling was linked to the formation of unusual, detergent-resistant complexes between Lyn and phosphorylated receptor subunits. Here, we show that H10-Fc epsilon RI multimers, induced by adding F(ab ')(2) of goat anti-mouse IgG to H10-treated cells, support strong Ca2+ mobilization and secretion. Accompanying the recovery of signaling, H10-Fc epsilon RI multimers do not form stable complexes with Lyn and do support the phosphorylation of Syk and phospholipase C gamma2. Immunogold electron microscopy showed that H10-Fc epsilon RI dimers colocalize preferentially with Lyn and are rarely within the osmiophilic "signaling domains" that accumulate Fc epsilon RI and Syk in Ag-treated cells. In contrast, H10-Fc epsilon RI multimers frequently colocalize with Syk within osmiophilic patches. In sucrose gradient centrifugation analyses of detergent-extracted cells, H10-treated cells show a more complete redistribution of Fc epsilon RI beta from heavy (detergent-soluble) to light (Lyn-enriched, detergent-resistant) fractions than cells activated with Fc epsilon RI multimers. We hypothesize that restraints imposed by the particular orientation of H10-Fc epsilon RI dimers traps them in signal-initiating Lyn microdomains, and that converting the dimers to multimers permits receptors to dissociate from Lyn and redistribute to separate membrane domains that support Syk-dependent signal propagation MH - Israel MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 10 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000171858300025 L2 - AFFINITY IGE RECEPTOR; PROTEIN-TYROSINE KINASE; RBL-2H3 MAST-CELLS; MEMBRANE DOMAINS; ACTIVATION; RESPONSES; PHOSPHORYLATION; P53/56(LYN); ASSOCIATION; BASOPHILS SO - Journal of Immunology 2001 ;167(8):4329-4337 3410 UI - 14322 AU - Lares ML AU - Orians KJ AD - Ctr Invest Cientif & Educ Super Ensenada BC, Dept Ecol, Ensenada 22800, Baja California, MexicoUniv British Columbia, Dept Earth & Ocean Sci, Vancouver, BC V6T 1Z4, CanadaLares, ML, CICESE, Dept Ecol, POB 434844, San Diego, CA 92143, USA TI - Differences in Cd elimination from Mytilus californianus and Mytilus trossulus soft tissues AB - Field results have shown that Mytilus californianus is able to release its Cd concentrations significantly in just a few days. The existing paradigm states that Cd elimination from Mytilus soft tissues is a very slow process. This discrepancy was investigated in the laboratory, testing the effect of two Cd levels (10 and 1 mug l(-1)) on its release from Mytilus trossulus and M. californianus soft tissues. After exposure to 10 mug l(-1), both species showed a significant uptake with no elimination after several days of depuration. After exposure to 1 mug l(-1), the responses were different. No significant Cd uptake was seen in M. trossulus while in M. californianus uptake was significant but returned to the background level after just 1 day of depuration. This response of M. californianus is consistent with that reported from field studies. These results are important for environmental monitoring programs since M. californianus has been used as equivalent to other Mytilus species in the assessment of Cd pollution. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Baja California MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000166927900011 L2 - mussels;Mytilus californianus;Mytilus trossulus;Cd exposure;Cd elimination;NORTHEAST PACIFIC; EDULIS-PLANULATUS; TRACE-METALS; SEA-WATER; CADMIUM; MUSSEL; ACCUMULATION; FOOD; BIOACCUMULATION; KINETICS SO - Environmental Pollution 2001 ;112(2):201-207 3411 UI - 12952 AU - Larios F AU - Tavares-Velasco G AU - Yuan CP AD - CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, VenezuelaCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoMichigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USACERN, CH-1211 Geneva 23, SwitzerlandLarios, F, CINVESTAV, Dept Fis Aplicada, AP 73, Merida 97310, Yucatan, Venezuela TI - Very light CP-odd scalar in the two-Higgs-doublet model AB - We show that a general two-Higgs-doublet model with a very light CP-odd scalar (A) can be compatible with the rho parameter, Br(b-->s gamma), R-b,A(b), (g-2)(mu) of the muon, Br(Y-->A gamma), and the direct search via the Yukawa process at CERN LEP. For its mass around 0.2 GeV, the muon (g - 2)(mu) and Br(Y --> A gamma) data require tan beta to be about 1. Consequently, A can behave like a fermiophobic CP-odd scalar and predominantly decay into a gamma gamma pair, which registers in detectors of high energy collider experiments as a single photon signature when the momentum of A is large. We compute the partial decay width of Z --> AAA and the production rate of f(f) over bar --> ZAA --> Z+ "gamma gamma," f'(f) over bar --> W+/- AA --> W+/- + "gamma gamma," and f(f) over bar --> H+ H- --> W+W- AA --> W+W- + "gamma gamma" at high energy colliders such as LEP, Fermilab Tevatron, CERN LHC, and future Linear Colliders. Other production mechanisms of a light A, such as gg --> h --> AA --> "gamma gamma," are also discussed MH - Mexico|Distrito Federal MH - Switzerland MH - USA MH - Venezuela PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000170726200043 L2 - ANOMALOUS MAGNETIC-MOMENT; SUPERSYMMETRIC STANDARD MODEL; BOSON PRODUCTION; QCD CORRECTIONS; RADIATIVE-CORRECTIONS; E(+)E(-) COLLISIONS; PROTON COLLIDERS; HADRONIC CONTRIBUTIONS; ROOT-S=189 GEV; NLO QCD SO - Physical Review D 2001 ;6405(5): 3412 UI - 12580 AU - Larralde H AU - Leyvraz F AU - Martinez-Mekler G AU - Rechtman R AU - Ruffo S AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Florence, INFM, Dipartimento Energet S Stecco, I-50139 Florence, ItalyIst Nazl Fis Nucl, I-50139 Florence, ItalyUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoLarralde, H, UNAM, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Transport properties of the diluted Lorentz slab AB - We study the behavior of a point particle incident on a slab of a randomly diluted triangular array of circular scatterers. Various scattering properties, such as the reflection and transmission probabilities and the scattering time are studied as a function of thickness and dilution. We show that a diffusion model satisfactorily describes the mentioned scattering properties. We also show how some of these quantities can be evaluated exactly and their agreement with numerical experiments. Our results exhibit the dependence of these scattering data on the mean free path. This dependence again shows excellent agreement with the predictions of a Brownian motion model MH - Italy MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171649000006 L2 - STATISTICAL PROPERTIES; GAS SO - Physical Review e 2001 ;6404(4): 3413 UI - 13447 AU - Larramendi EM AU - Calzadilla O AU - Gonzalez-Arias A AU - Hernandez E AU - Ruiz-Garcia J AD - Univ Havana, Fac Phys, La Habana 10400, CubaUASLP, Inst Phys, San Luis Potosi 78000, MexicoLarramendi, EM, Univ Havana, Fac Phys, Colina Univ, La Habana 10400, Cuba TI - Effect of surface structure on photosensitivity in chemically deposited PbS thin films AB - Thin films of polycrystalline PbS, with possible applications as infrared radiation detectors, were grown on glass substrates by deposition from a solution, immersed in a chemical bath. Small quantities of Br-1 ions were introduced in the bath in the form of a KBr solution. The films showed good crystallinity and stoichiometry in ah their thickness. No Br impurities were detected in the grown films when submitted to the Rutherford backscattering spectroscopy and particle induced X-ray emission techniques; however, the KBr concentration in the bath affected the morphology of the film surfaces. The electron microscopy and the atomic force microscopy showed that the mean grain size of the PbS formed on the substrate increased with the KBr concentration in the bath by a linear dependence. Changes in the height of the grains were also detected, and X-ray diffraction procedures showed evidence of preferred orientation of the grains. The study of the electric conductivity sigma (o) and the photosensitivity of the films disclosed that the KBr in the growth solution also affects the optoelectric features. The optimum photosensitivity was attained for a mean grain size of approximately 0.9 mum, which corresponds to the films where the height of the grains was larger. The results can be reasonably explained taking into account the models of Neustroev and Gudaev, assuming that a, is conditioned by the disorder of the inverted conductivity channels present on the grain boundaries at the film surface. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|San Luis Potosi PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000169378200046 L2 - chemical bath deposition;lead sulfide;PbS;chalcogens;OPTICAL-PROPERTIES SO - Thin Solid Films 2001 ;389(1-2):301-306 3414 UI - 14059 AU - Larramendi EM AU - Puron E AU - Hernandez LC AU - Sanchez M AU - De Roux S AU - de Melo O AU - Romero-Paredes G AU - Pena-Sierra R AU - Tamura M AD - Univ Havana, Fac Phys, IMRE, La Habana 10400, CubaCINVESTAV, IPN, SEES, Dept Elect Engn, Mexico City 07000, DF, MexicoCINVESTAV, IPN, Dept Phys, Mexico City 07000, DF, Mexicode Melo, O, Univ Havana, Fac Phys, IMRE, Colina Univ, La Habana 10400, Cuba TI - Atomic layer epitaxy of ZnTe by isothermal closed space sublimation AB - Atomic layer epitaxy growth of ZnTe films is achieved using a novel isothermal closed-space sublimation system with elemental sources. X-rays, electron diffraction and optical measurements indicated the epitaxial quality of the films and confirmed a self-regulated atomic layer epitaxy regime. As the procedure is near equilibrium, the self-regulation mechanism is different from that occurring in other techniques like molecular beam epitaxy. In the present case, the difference in vapor pressures between the elemental source and the growing surface is the driving force for the growth; this difference being zero once the surface is completely covered. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000167740900001 L2 - atomic layer epitaxy;semiconducting II-VI materials;GROWTH; SUPERLATTICES SO - Journal of Crystal Growth 2001 ;223(4):447-449 3415 UI - 12971 AU - Larrea F AU - Garcia-Becerra R AU - Lemus AE AU - Garcia GA AU - Perez-Palacios G AU - Jackson KJ AU - Coleman KM AU - Dace R AU - Smith CL AU - Cooney AJ AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City Gen Hosp, Sch Med, Mexico City 06726, DF, MexicoBaylor Coll Med, Dept Mol & Cellular Biol, Houston, TX 77030, USALarrea, F, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Quiroga 15, Mexico City 14000, DF, Mexico TI - A-ring reduced metabolites of 19-nor synthetic progestins as subtype selective agonists for ER alpha AB - It has previously been demonstrated that 19-nor contraceptive progestins undergo in vivo and in vitro enzyme-mediated A-ring double bond hydrogenation. Bioconversion of 19-nor progestins to their corresponding tetrahydro derivatives results in the loss of progestational activity and acquisition of estrogenic activities and binding to the ER. Herein, we report subtype-selective differences in ligand binding and transcriptional potency of nonphenolic synthetic 19-nor derivatives between ER alpha and ER beta. In this study, we have examined both ER- and PR-mediated transcriptional activity of a number of A-ring chemically reduced derivatives of norethisterone and Gestodene. Double bond hydrogenation decreased the transcriptional potency of norethisterone and Gestodene through both PR isoforms with a 100- to 1,000-fold difference, respectively. In terms of the effects of norethisterone and Gestodene and their corresponding 5 alpha -dihydro (5 alpha -norethisterone and 5 alpha -Gestodene), or 3 alpha ,5 alpha -tetrahydro or 3 beta ,5 alpha -tetrahydro derivatives (3 alpha ,5 alpha -norethisterone/3 alpha ,5 alpha -Gestodene and 3 beta ,5 alpha -norethisterone/3 beta ,5 alpha -Gestodene, respectively) on estrogen-mediated transcriptional regulation, the 3 beta ,5 alpha -tetrahydro derivatives of both norethisterone and Gestodene showed the highest induction when HeLa cells were transiently transfected with an expression vector for ER alpha. This activity could be inhibited with tamoxifen. These compounds did not activate gene transcription via ER beta, and none of them showed antagonistic activities through either ER subtype. The 3 beta ,5 alpha -tetrahydro derivatives of both norethisterone and Gestodene were active in other cells in addition to HeLa cells and activated reporter expression through the oxytocin promoter. In summary, two ER alpha selective agonists have been identified. These compounds, with ER alpha vs. ER beta selective agonist activity, may be useful in evaluating the distinct role of these receptors as well as in providing useful insights into ER action MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 24 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0013-7227 UR - ISI:000170689500009 L2 - ESTROGEN-RECEPTOR-ALPHA; RETINOIC ACID RECEPTORS; BETA MESSENGER-RNA; TISSUE DISTRIBUTION; THYROID-HORMONE; NORETHISTERONE; MECHANISMS; BINDING; GENE; MODULATION SO - Endocrinology 2001 ;142(9):3791-3799 3416 UI - 13082 AU - Larrubia MA AU - Alejandre AG AU - Solis JR AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc G B Bonino, I-16129 Genoa, ItalyUniv Mexico, Cuernavaca, Morelos, Mexico TI - FTIR study of the interaction of dioxin, carbazole, dibenzothiophene, and 4,6-dimethyldibenzothiophene on metal oxide catalysts MH - Italy MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824802823 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U468-U468 3417 UI - 12992 AU - Lartigue J AU - Padilla R AU - Martinez T AU - Orta M AD - Natl Autonomous Univ Mexico, Fac Ciencias, CU, Mexico City 04510, DF, MexicoCEADEN, Havana, CubaLartigue, J, Natl Autonomous Univ Mexico, Fac Ciencias, CU, Mexico City 04510, DF, Mexico TI - EDXRF determination of Pb in aerosol samples from Mexico Valley AB - Atmospheric pollution in very populated towns is mainly generated from fuel combustion and industrial activity, though in some regions, soil erosion, residues incineration and forest fires contribute appreciably. In the case of Mexico Valley, there exists a permanent additional factor-volcanic ash whose chemical and physical characteristics represent a serious sample-preparation problem. This paper proposes an analytical procedure based on the energy dispersive X-ray fluorescence method (EDXRF), being quick, reliable and non-destructive, to determine Pb concentration in aerosol samples. A good correlation factor with the atomic absorption (AA) method is obtained. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000170526600132 L2 - Pb concentration;aerosol samples;EDXRF SO - Radiation Physics and Chemistry 2001 ;61(3-6):681-682 3418 UI - 12439 AU - Laska M AU - Kohlmann S AU - Scheuber HP AU - Salazar LTH AU - Luna ER AD - Univ Munich, Sch Med, Dept Psychol Med, D-80336 Munich, GermanyUniv Munich, Sch Med, Dept Surg, D-80336 Munich, GermanyUniv Veracruz, Inst Neuroetol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Psychol Med, Marchioninistr 15, D-80336 Munich, Germany TI - Gustatory responsiveness to polycose in four species of nonhuman primates AB - The taste responsiveness of six squirrel monkeys, five pigtail macaques, four olive baboons, and four spider monkeys to polycose, a starch-derived polysaccharide, was assessed in two-bottle preference tests of brief duration (2 min). In experiment 1, the monkeys were given the choice between tap water and defined concentrations of polycose dissolved in tap water. In experiment 2, the animals were given the choice between polycose and sucrose, fructose, glucose, lactose, and maltose presented in equimolar concentrations of 100 and 200 mM, respectively. The animals were found to prefer concentrations of polycose as low as 10 mM (pigtail macaques), 30 mM (olive baboons and spider monkeys). and 60 mM (squirrel monkeys) over tap water. Relative taste preferences were stable across the concentrations tested and indicate an order of relative effectiveness (sucrose > polycose greater than or equal to maltose) in squirrel monkeys, spider monkeys, and olive baboons that is similar to the order of relative sweetness in humans. Pigtail macaques, however, displayed an order of relative effectiveness (maltose > polycose sucrose) that differs markedly from that found in the other primate species tested and is similar to relative taste preferences found in rodents such as rats. Both the high sensitivity of the pigtail macaques to polycose and their vivid predilection for this polysaccharide and its disaccharide constituent maltose suggest that Macaca nemestrina, unlike other primates, but like rodents, may have specialized taste receptors for starch MH - Germany MH - Mexico|Veracruz PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000171975400007 L2 - gustatory preference thresholds;relative taste preferences;polycose;FOOD-ASSOCIATED SUGARS; TASTE PREFERENCE THRESHOLDS; MONKEY SAIMIRI-SCIUREUS; DIFFERENCE THRESHOLDS; SQUIRREL-MONKEYS; ATELES-GEOFFROYI; SUCROSE; POLYSACCHARIDE; MALTOSE; RATS SO - Journal of Chemical Ecology 2001 ;27(10):1997-2011 3419 UI - 11504 AU - Lasserre JB AU - Zeron ES AD - CNRS, LAAS, F-31077 Toulouse 4, FranceIPN, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoLasserre, JB, CNRS, LAAS, 7 Ave Colonel Roche, F-31077 Toulouse 4, France TI - A Laplace transform algorithm for the volume of a convex polytope AB - We provide two algorithms for computing the volume of the convex polytope Omega := {x is an element of R-+(n) \ Ax less than or equal to b}, for A is an element of R-mxn, b is an element of R-n. The computational complexity of both algorithms is essentially described by n(m), which makes them especially attractive for large n and relatively small in, when the other methods with O(m(n)) complexity fail. The methodology, which differs from previous existing methods, uses a Laplace transform technique that is well suited to the half-space representation of Omega MH - France MH - Mexico|Distrito Federal PB - NEW YORK: ASSOC COMPUTING MACHINERY RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Hardware & Architecture;Computer Science, Information Systems;Computer Science, Software Engineering;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0004-5411 UR - ISI:000174674100002 L2 - algorithms;computational geometry;convex polytope;Laplace transform;volume of a convex polytope;COMPLEXITY; POLYHEDRON SO - Journal of the Acm 2001 ;48(6):1126-1140 3420 UI - 12014 AU - Lastras-Martinez LF AU - Ronnow D AU - Santos PV AU - Cardona M AU - Eberl K AD - Max Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyUniv Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi, MexicoPaul Drude Inst Festkorperelekt, D-10117 Berlin, GermanyLastras-Martinez, LF, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany TI - Optical anisotropy of (001)-GaAs surface quantum wells AB - We report a reflectance difference spectroscopy (RDS) study of the optical anisotropy of GaAs:(001) Surface quantum wells consisting of a thin GaAs layer (3-30 nm thick) embedded between an arsenic reconstructed surface and an AlAs barrier. The RDS spectra display anisotropic contributions from the free Surface and from the GaAs/AlAs interface. By comparing RDS spectra for the c(4x4) and (2x4) Surface reconstructions, we separate these two contributions, and demonstrate that the anisotropy around the E-1 and E-1 + Delta(1) transitions comprises a component originating from modifications of bulk states near the surface. The latter is attributed to anisotropic strains induced by the surface reconstruction. The experimental data Lire well described by a model for the RDS response of the multilayer structures, which also takes into account the blue energy shifts and the changes in oscillator strength of the E-1 and E-1 + Delta(1) transitions induced by quantum-well confinement MH - Germany MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000173082500055 L2 - REFLECTANCE-DIFFERENCE SPECTROSCOPY; 001 GAAS; CUBIC SEMICONDUCTORS; GAAS(001); SPECTRA; SUPERLATTICES; GAAS(100); GROWTH; GAP SO - Physical Review B 2001 ;64(24): 3421 UI - 12850 AU - Laundre JW AU - Hernandez L AU - Altendorf KB AD - Chihuahua Reg Ctr, AC, Inst Ecol, Aldama 32900, Chihuahua, MexicoIdaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USALaundre, JW, Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USA TI - Wolves, elk, and bison: reestablishing the "landscape of fear" in Yellowstone National Park, USA AB - The elk or wapiti (Cervus elaphus) and bison (Bison bison) of Yellowstone National Park have lived in an environment free of wolves (Canis lupus) for the last 50 years. In the winter of 1994-1995, wolves were reintroduced into parts of Yellowstone National Park. Foraging theory predicts that elk and bison would respond to this threat by increasing their vigilance levels. We tested this prediction by comparing vigilance levels of elk and bison in areas with wolves with those of elk still in "wolf-free" zones of the Park. Male elk and bison showed no response to the reintroduction of wolves, maintaining the lowest levels of vigilance throughout the study (approximate to 12 and 7% of the time was spent vigilant, respectively). Female elk and bison showed significantly higher vigilance levels in areas with wolves than in areas without wolves. The highest vigilance level (47.5 +/- 4.1%; mean +/- SE) was seen by the second year for female elk with calves in the areas with wolves and was maintained during the subsequent 3 years of the study. As wolves expanded into non-wolf areas, female elk with and without calves in these areas gradually increased their vigilance levels from initially 20.1 +/- 3.5 and 11.5 +/- 0.9% to 43.0 +/- 5.9 and 30.5 +/- 2.8% by the fifth year of the study, respectively. We discuss the possible reasons for the differences seen among the social groups. We suggest that these behavioural responses to the presence of wolves may have more far-reaching consequences for elk and bison ecology than the actual killing of individuals by wolves MH - Mexico|Chihuahua MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 61 U4 - Zoology U5 - J;Article AV - English IS - 0008-4301 UR - ISI:000171013200007 L2 - GROUP-SIZE; VIGILANCE BEHAVIOR; PREDATION RISK; PATCH USE; HABITAT SO - Canadian Journal of Zoology-Revue Canadienne de Zoologie 2001 ;79(8):1401-1409 3422 UI - 12776 AU - Laureano-Cruces AL AU - De Arriaga-Gomez F AU - Sanchez MGA AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoUniv Politecn Madrid, E-28040 Madrid, SpainCSIC, Inst Automat Ind, Madrid, Spain TI - Cognitive task analysis: a proposal to model reactive behaviours AB - A tentative analysis and design of behaviours to be implemented in robots has been developed. For that purpose we have analysed the human behaviour of the person who executes the robot task. Afterwards we have transferred this analysis to the robot in charge of the same task. The cognitive task analysis, a powerful tool coming from cognitive psychology, has been used to study the behaviour granularity of the robots. This analysis is of paramount importance because the implementation of more sophisticated robot behaviours depends on the appropriate selection of the basic robot behaviours. The paper introduces a brief explanation of different types of robot architectures, and our motivation, to give, later on, some ideas concerning the cognitive task analysis and the used methods; finally, as an example, the behaviour of a postman is modelled by using those tools to get the necessary behaviours for a robot in charge of that task MH - Mexico|Distrito Federal MH - Spain PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0952-813X UR - ISI:000171161300005 L2 - cognitive task analysis;reactive agents;behaviour-based artificial intelligence;multiagent architectures and robots SO - Journal of Experimental & Theoretical Artificial Intelligence 2001 ;13(3):227-239 3423 UI - 14288 AU - Laurens V AU - Chapusot C AU - Ordonez MD AU - Bentrari F AU - Padros MR AU - Tournefier A AD - Univ Bourgogne, Grp Immunol Comparee, CNRS, UMR 5548, F-21000 Dijon, FranceUniv Autonoma Puebla, Inst Fisiol, Puebla 72570, MexicoLaurens, V, Univ Bourgogne, Grp Immunol Comparee, CNRS, UMR 5548, 6 Blvd Gabriel, F-21000 Dijon, France TI - Axolotl MHC class II beta chain: predominance of one allele and alternative splicing of the beta 1 domain AB - The axolotl MHC is composed of multiple polymorphic class I loci linked to class II B loci. In this report, evidence of the existence of one class II B locus (Amme-DAB) that codes for two different transcripts is given. A 2.1-kb transcript is translated to a complete beta chain and a shorter transcript of 1.8 kb encodes a molecule lacking the beta1 domain. For two complete class II B mRNA synthesized, up to one mRNA devoid of the beta1 domain is synthesized. Alternative splicing involving a peptide binding domain at a class II B locus evidenced in axolotl (Ambystoma mexicanum) is also observed for A. trigrinum, the tiger salamander. Very little variability is found among various axolotl MHC class II B cDNA sequences, and the same allele is obtained from inbred and wild axolotls. The transcription of one MHC class B locus in two class II B isoforms in thymic cells and in splenic lymphocytes may shed new light on the well-known deficient immune responder state of the axolotl MH - France MH - Mexico|Puebla PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Immunology U5 - J;Article AV - English IS - 0014-2980 UR - ISI:000167029100022 L2 - comparative immunology;evolution;MHC;cDNA;urodele;MAJOR HISTOCOMPATIBILITY COMPLEX; MEXICAN AXOLOTL; NONMAMMALIAN VERTEBRATES; ECTOTHERMIC VERTEBRATES; IMMUNE-SYSTEM; POLYMORPHISM; GENES; ORGANIZATION; DIVERSITY; EVOLUTION SO - European Journal of Immunology 2001 ;31(2):506-515 3424 UI - 13236 AU - Lauziere I AU - Perez-Lachaud G AU - Brodeur J AD - Univ Laval, Ctr Rech Hort, Dept Phytol, St Foy, PQ G1K 7P4, CanadaColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoPerez-Lachaud, G, En Naurous, F-31590 Verfeil, France TI - Importance of nutrition and host availability on oogenesis and oviposition of Cephalonomia stephanoderis (Hymenoptera : Bethylidae) AB - A variety of host and non-host meals were tested for their potential In triggering oogenesis and oviposition in females of Cephalonomia stephanoderis Betrem, a synovigenic parasitoid of the coffee berry borer, Hypothenemus hampei (Ferrari). The consumption of non-host meals or meals composed of honey and crushed host eggs or pupae was insufficient to initiate oogenesis. The presence of suitable hosts for oviposition appeared essential for inducing oogenesis and oviposition in this parasitoid. Whereas females may host-feed on all developmental stages of H. hampei, these were not equally suitable in stimulating oogenesis and oviposition. In no-choice tests, oogenesis and oviposition were observed only in females supplied with fully-developed larvae, prepupae and pupae. Direct contact with hosts apparently stimulated egg maturation and egg-laying. Delaying the allocation of energy to egg production until suitable hosts are available for oviposition may be an adaptive attribute of a parasitoid of a concealed and patchily distributed host such as H. hampei MH - Canada MH - France MH - Mexico|Chiapas PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0007-4853 UR - ISI:000170078600004 L2 - COFFEE BERRY BORER; HYPOTHENEMUS-HAMPEI COLEOPTERA; PARASITOIDS; SCOLYTIDAE; BEHAVIOR; BIOLOGY; SIZE SO - Bulletin of Entomological Research 2001 ;91(3):185-191 3425 UI - 13575 AU - Lauziere I AU - Brodeur J AU - Perez-Lachaud G AD - Univ Laval, Ctr Rech Hort, Dept Phytol, St Foy, PQ G1K 7P4, CanadaEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoLauziere, I, USDA, APHIS, PPQ, Mission Plant Protect Ctr, POB 2140, Mission, TX 78504 USA TI - Host stage selection and suitability in Cephalonomia stephanoderis Betrem (Hymenoptera : Bethylidae), a parasitoid of the coffee berry borer AB - Paired choice experiments were used to evaluate host feeding and oviposition preferences of Cephalonomia stephanoderis (Hymenoptera: Bethylidae), a solitary ectoparasitoid of the coffee berry borer (CBB), Hypothenemus hampei (Coleoptera: Scolytidae). Immature and ovipositing females may feed on all developmental stages of the host, but prefer eggs and adults. Parasitoid females parasitize prepupae, pupae, and fall-grown larvae of H. hampei, the latter stage being least preferred. Ovipositional decisions of C. stephanoderis females lead to the selection of the most profitable host stage for parasitoid development because parasitoids developing on larval hosts took more time to reach the adult stage and were smaller than those developing on prepupal and pupal hosts. The behavioral plasticity of C. stephandoderis in CBB host stage selection for both host feeding and oviposition may contribute to the survival and establishment of C. stephanoderis as a biological control agent of H. hampei in coffee plantations. (C) 2001 Academic Press MH - Canada MH - Mexico|Chiapas MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000169073000005 L2 - Cephalonomia stephanoderis;Hypothenemus hampei;coffee berry borer;host feeding;host selection;host suitability;HYPOTHENEMUS-HAMPEI COLEOPTERA; BEHAVIOR; SCOLYTIDAE; STRATEGIES; SIZE; AGE SO - Biological Control 2001 ;21(2):128-133 3426 UI - 13603 AU - Lawson PA AU - Wacher C AU - Hansson I AU - Falsen E AU - Collins MD AD - Univ Reading, Sch Food Biosci, Reading RG6 6AP, Berks, EnglandUniv Nacl Autonoma Mexico, Dept Alimentos & Biotecnol, Fac Quim, Mexico City 04510, DF, MexicoSwedish Vet Inst, Dept Bacteriol, Uppsala, SwedenUniv Gothenburg, Dept Clin Bacteriol, Gothenburg, SwedenCollins, MD, Univ Reading, Sch Food Biosci, Reading RG6 6AP, Berks, England TI - Lactobacillus psittaci sp nov., isolated from a hyacinth macaw (Anodorhynchus hyacinthinus) AB - A Gram-positive, non-spore-forming, catalase-negative, facultatively anaerobic coccibacillus to rod-shaped bacterium isolated from a parrot was characterized using phenotypic and molecular taxonomic methods. The unknown bacterium phenotypically resembled lactobacilli and comparative 16S rRNA gene sequencing demonstrated that the organism represents a distinct subline within the Lactobacillus delbrueckii rRNA cluster of the genus. 16S rRNA sequence divergence; values of >6% with recognized Lactobacillus species clearly demonstrated the phylogenetic separateness of the parrot bacterium. On the basis of phylogenetic evidence and the phenotypic distinctiveness of the unknown bacterium, a new species, Lactobacillus psittaci sp. nov., is proposed. The type strain of Lactobacillus psittaci is CCUG 42378(T) (= CIP 1064923(T)) MH - United Kingdom MH - Mexico|Distrito Federal MH - Sweden PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000168900000030 L2 - Lactobacillus psittaci;parrot;16S rRNA;taxonomy;phylogeny;LACTIC-ACID BACTERIA; INFECTION; CHICKENS SO - International Journal of Systematic and Evolutionary Microbiology 2001 ;51():967-970 3427 UI - 14408 AU - Lawson PA AU - Papademas P AU - Wacher C AU - Falsen E AU - Robinson R AU - Collins MD AD - Univ Reading, Dept Food Sci & Technol, Reading RG6 6AP, Berks, EnglandUniv Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoGothenburg Univ, Dept Clin Bacteriol, Culture Collect, S-41346 Gothenburg, SwedenLawson, PA, Univ Reading, Dept Food Sci & Technol, Reading RG6 6AP, Berks, England TI - Lactobacillus cypricasei sp nov., isolated from Halloumi cheese AB - Four strains of a hitherto unknown bacterium isolated from Halloumi cheese were compared by using phenotypic and phylogenetic studies. Comparative 16S rRNA gene sequencing demonstrated that the strains were identical to each other and represent a new subline within the genus Lactobacillus. The unknown bacterium was readily distinguished from other described Grampositive catalase-negative taxa by means of biochemical tests and electrophoretic analysis of whole-cell proteins. On the basis of phylogenetic and phenotypic evidence, it is proposed that the unknown bacterium be classified as Lactobacillus cypricasei sp. nov. The type strain of L. cypricasei is CCUG 42961(T) (= CIP 106393(T)) MH - United Kingdom MH - Mexico|Distrito Federal MH - Sweden PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000166641100006 L2 - Lactobacillus cypricasei;Halloumi cheese;16S rRNA;taxonomy;phylogeny;LACTIC-ACID BACTERIA SO - International Journal of Systematic and Evolutionary Microbiology 2001 ;51():45-49 3428 UI - 13285 AU - Lazarian A AU - Pogosyan D AU - Vazquez-Semadeni E AU - Pichardo B AD - Univ Wisconsin, Dept Astron, Madison, WI 53706, USAUniv Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 1A1, CanadaUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoLazarian, A, Univ Wisconsin, Dept Astron, Madison, WI 53706, USA TI - Emissivity statistics in turbulent compressible magnetohydrodynamic flows and the density-velocity correlation AB - In this paper we test the results of a recent analytical study by Lazarian and Pogosyan on the statistics of emissivity in velocity channel maps, in the case of realistic density and velocity fields obtained from numerical simulations of magnetohydrodynamic turbulence in the interstellar medium. To compensate for the lack of well-developed inertial ranges in the simulations owing to the limited resolution, we apply a procedure for modifying the spectral slopes of the fields while still preserving the spatial structures. We find that the density and velocity are moderately correlated in space, and we prove that the analytical results by Lazarian and Pogosyan hold in the case when these fields obey the fluid conservation equations. Our results imply that the spectra of velocity and density can be safely recovered from the position-position-velocity (PPV) data cubes available through observations and confirm that the relative contributions of the velocity and density fluctuations to those of the emissivity depend on the velocity resolution used and on the steepness of the density spectral index. Furthermore, this paper supports previous reports that an interpretation of the features in the PPV data cubes as simple density enhancements (i.e., "clouds") can often be erroneous, as we observe that changes in the velocity statistics substantially modify the emissivity statistics within the velocity data cubes MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000169944500015 L2 - ISM : general;ISM : structure;radio lines : ISM;turbulence;INTERSTELLAR-MEDIUM; MOLECULAR CLOUDS; MAGNETIC-FIELDS SO - Astrophysical Journal 2001 ;555(1):130-138 3429 UI - 12175 AU - Lazaro C AU - Caseras X AU - Whizar-Lugo VM AU - Wenk R AU - Baldioceda F AU - Bernal R AU - Ovalle A AU - Torrubia R AU - Banos JE AD - Univ Autonoma Barcelona, Fac Med, Dept Farmacol Terapeut & Toxicol, Bellaterra 08193, SpainUniv Autonoma Barcelona, Dept Psiquiat & Med Legal, Bellaterra 08193, SpainCtr Med Noroeste, Serv Profesionales Anestesiol, Tijuana, Baja California, MexicoCtr Med Noroeste, Clin Dolor, Tijuana, Baja California, MexicoWorld Hlth Org Focal Point, Programa Argentino Med Paiat, San Nicolas, ArgentinaTrastornos Temporo Mandibulares & Dolor Facial, San Jose, Costa RicaInst Oncol Nacl, El Dorado, PanamaBanos, JE, Univ Autonoma Barcelona, Fac Med, Dept Farmacol Terapeut & Toxicol, Bellaterra 08193, Spain TI - Psychometric properties of a Spanish version of the McGill Pain Questionnaire on several Spanish-speaking countries AB - Objective: Versions of the McGill Pain Questionnaire are available in a several languages and are used in clinical studies and sociocultural or ethnic comparisons of pain issues. However, there is a lack of studies that compare the validity and reliability of the instrument in the countries where it is used. The current study investigates the psychometric properties of a Spanish version of the McGill Pain Questionnaire in five Spanish-speaking countries. Design: The authors conducted a multicenter and transnational study with one investigator in each center. Patients were evaluated once with a Spanish version of the McGill Pain Questionnaire, a visual analog scale, and a verbal rating scale. Setting: The study was per-formed in pain clinics and acute pain units of four Latin American countries (Argentina, Costa Rica, Mexico, and Panama) and Spain. Patients: The study included 205 patients (84 with acute pain, 121 with chronic pain) from Latin America. Their data were compared with those of 282 Spanish patients. Interventions: The McGill Pain Questionnaire, visual analog scale, and verbal rating scale were administered once to all patients. The McGill Pain Questionnaire was administered again to patients from Latin America countries to ascertain descriptor comprehension. Outcome measures: Demographic data, McGill Pain Questionnaire parameters, and visual analog scale and a verbal rating scale scores were obtained from patients with chronic and acute pain. Psychometric properties of the Spanish version of the McGill Pain Questionnaire were established for each country by calculating the ordinal consistency by means of rank-scale correlation (Spearman test), intercategory correlation, and interparameter correlation (Pearson test). Concurrent validity was also calculated by comparing scores from the visual analog scale (Pearson test) and verbal rating scale (Spearman test) with questionnaire parameters (qualitative-to-quantitative comparisons). Results: The Spanish version of the McGill Pain Questionnaire maintained a high internal validity when tested in different countries. Ordinal consistency, intercategory, interparameter, and qualitative-to-quantitative parameter correlations were similar in all countries. Few descriptors were considered to be inappropriate or difficult to understand. Conclusions: The psychometric properties of the Spanish version of the McGill Pain Questionnaire assessed in different Latin-American countries suggest that the questionnaire may be used to evaluate Spanish-speaking patients. The validity of this test should be extended with reliability studies to further establish its usefulness in the evaluation of pain MH - Argentina MH - Costa Rica MH - Mexico|Baja California MH - Panama MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Anesthesiology;Clinical Neurology U5 - J;Article AV - English IS - 0749-8047 UR - ISI:000172730700012 L2 - cultural differences in pain;McGill Pain Questionnaire;pain assessment;transnational studies;QUALITY-OF-LIFE; VALIDITY; ADAPTATION; HEALTH; SPAIN SO - Clinical Journal of Pain 2001 ;17(4):365-374 3430 UI - 13782 AU - Lazcano-Ponce E AU - Smith JS AU - Munoz N AU - Conde-Glez CJ AU - Juarez-Figueroa L AU - Cruz A AU - Hernandez M AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoInt Agcy Res Canc, F-69372 Lyon, FranceLazcano-Ponce, E, Inst Nacl Salud Publ, Ave Univ 655,Colonia Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - High prevalence of antibodies to herpes simplex virus type 2 among middle-aged women in Mexico city, Mexico - A population-based study AB - Background: Herpes simplex virus type 2 (HSV-2) is among the most prevalent sexually transmitted diseases worldwide. In Mexico there is a lack of population-based HSV-2 surveys. Goals: To determine population-based HSV-2 seroprevalence and risk factors among women in Mexico City, Study Design: A random sample of 730 women was identified among the residents of Mexico City. Women ages 25 to 85 years were selected from 3694 households, Western blot serology testing was conducted on serum samples to determine HSV-2 type-specific serostatus, A structured questionnaire was administered, and multivariate analyses were performed to identify risk factors for HSV-2 seropositivity, which were stratified into two age categories: younger than 50 years of age and 50 years of age or older, Results: The HSV-2 seroprevalence among female participants was 29.8%, with a significant trend of increasing HSV-2 prevalence for each higher level of age (P < 0.001), Female participants had a median age of 46 years and were predominantly monogamous (82.6%). The overall population-based seroprevalence estimated in Mexico City among women was 35.8%, The independent risk factors for HSV-2 seropositivity included a history of two or more sexual partners (odds ratio [OR], 2.2; 95% CI, 1.4-3.4), two or more sexual partner before first pregnancy (OR, 2.3; 95% CI, 1,4-3,7), cohabitation with partner (OR, 2.5; 95% CI, 1,3-4,7), and current vaginal douching (OR, 1.7; 95% CI, 1.2-2.6), Conclusions: Population-based HSV-2 seroprevalence is endemically high among middle-age women in Mexico City, and clearly is correlated with higher-risk sexual behavior. This elevated HSV-2 seroprevalence may reflect unrecognized HSV-2 transmission throughout life MH - France MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 11 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0148-5717 UR - ISI:000168452300005 L2 - POLYMERASE-CHAIN-REACTION; GENITAL HERPES; UNITED-STATES; GLYCOPROTEIN-G; SEX WORKERS; RISK FACTOR; INFECTIONS; TRANSMISSION; ACQUISITION; CALIFORNIA SO - Sexually Transmitted Diseases 2001 ;28(5):270-276 3431 UI - 13783 AU - Lazcano-Ponce E AU - Herrero R AU - Munoz N AU - Hernandez-Avila M AU - Salmeron J AU - Leyva A AU - Meijer CJLM AU - Walboomers JMM AD - Inst Nacl Salud Publ, Cuernavaca 62805, Morelos, MexicoInt Agcy Res Canc, F-69372 Lyon, FranceMexican Inst Social Secur, Mexico City, DF, MexicoFree Univ Amsterdam Hosp, NL-1081 HV Amsterdam, NetherlandsLazcano-Ponce, E, Inst Nacl Salud Publ, Ave Univ 655,Colonia Sta Maria Ahuacatitlan, Cuernavaca 62805, Morelos, Mexico TI - High prevalence of human papillomavirus infection in Mexican males - Comparative study of penile-urethral swabs and urine samples AB - Background: Although extensive information has been gathered about the prevalence and determinants of human papillomavirus infection among women, little is known about the prevalence and natural history of this infection among males. Goal: To investigate the potential usefulness of urine specimens to assess the presence of genital human papillomavirus DNA infection, Study Design: The authors conducted a study of 120 healthy men from Cuernavaca, Mexico. A urine specimen and urethral and coronal sulcus swab samples were collected and tested for human papillomavirus using the GP5+/6+ polymerase chain reaction enzyme immunoassay method. Results: In 95% of the urethral-coronal sulcus samples, the beta -globin gene was detectable, indicating adequacy of the specimen for DNA amplification; however, only 14% of the urine specimens had detectable beta -globin, Removal of inhibitors by DNA purification in a sample of subjects produced beta -globin amplification, but no increase in human papillomavirus DNA positivity was detected. Human papillomavirus DNA was not detectable in penile-urethral swab samples in any of the subjects who reported not having engaged in sexual activity but was present in 43% of men who reported sexual activity, a strong indication of the sexual transmission of human papillomavirus. Conclusions: Human papillomavirus is a common sexually transmitted infection among Mexican males, and urine sample specimens cannot adequately detect the presence of this infection in males MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 34 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0148-5717 UR - ISI:000168452300006 L2 - POLYMERASE CHAIN-REACTION; CERVICAL-CANCER; UROGENITAL TRACTS; RAPID DETECTION; HIGH-RISK; DNA; SPECIMENS; MEN; PCR SO - Sexually Transmitted Diseases 2001 ;28(5):277-280 3432 UI - 14602 AU - Lazcano-Ponce E AU - Herrero R AU - Munoz N AU - Cruz A AU - Shah KV AU - Alonso P AU - Hernandez P AU - Salmeron J AU - Hernandez M AD - Inst Nacl Salud Publ, Ctr Populat Hlth Res, Cuernavaca 62508, Morelos, MexicoInt Agcy Res Canc, F-69372 Lyon, FranceJohns Hopkins Univ, Sch Publ Hlth, Dept Mol Microbiol & Immunol, Baltimore, MD, USANatl Autonomous Univ Mexico, Mexico Gen Hosp, Cytopathol Lab, Mexico City 04510, DF, MexicoMexican Inst Social Secur, Cuernavaca, Morelos, MexicoLazcano-Ponce, E, Inst Nacl Salud Publ, Ctr Populat Hlth Res, Ave Univ 655,Colonia St Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Epidemiology of HPV infection among Mexican women with normal cervical cytology AB - Cervical cancer is caused by human papillomavirus (HPV) and is the most common cancer among Mexican women, but no population-based studies have reported the prevalence and determinants of HPV infection in Mexico. A population-based study was carried out between 1996 and 1999, based on an age-stratified random sample of 1,340 women with normal cytologic diagnoses from 33 municipalities of Morelos State, Mexico. The prevalence of cervical HPV DNA was determined by reverse line blot strip assay to detect 17 cancer-associated and 10 non-cancer-associated HPV types, Two peaks of HPV DNA prevalence were observed, A first peak of 16.7% was observed in the age group under 25 years, HPV DNA prevalence declined to 3.7% in the age group 35-44 years, then increased progressively to 23% among women 65 years and older. Cancer-associated HPV types were the most common in all age groups; non-cancer-associated HPV types were rare in the young and became more common linearly with age. Twenty-four types of HPV were detected; HPV 16, HPV 53, HPV 31 and HPV 18 were the most common, but none was present in more than 1.7% of subjects, The main determinant of infection with both cancer-associated and non-cancer-associated HPV types was the number of sexual partners in all age groups. Less-educated women were at an increased risk of infection with cancer-associated but not with non-cancer-associated HPV types; low socioeconomic status was associated with detection of non-cancer-associated HPV types. Among young women an increasing number of pregnancies was associated with lower HPV detection and among older women low socioeconomic status was related to increased HPV detection, particularly for the age group 35-54 years. Among women with cancer-associated HPV types, there was a higher intensity of polymerase chain reaction signal in younger than in older age groups (p < 0.001). We present additional evidence for the sexually transmitted nature of HPV infection, regardless of age group and HPV type. We confirm previous findings of a second peak of high-risk HPV infections in postmenopausal women, in this case with a clear predominance of cancer-associated HPV types. In populations with this pattern, which can be related to reactivation of latent HPV infections or high previous exposure in order women, screening with HPV testing can have a reduced specificity among older women if proper cut-off points for HPV positivity are not used. Longitudinal studies of immune responses to HPV infection in different age groups are warranted. (C) 2001 Wiley-Liss, Inc MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 95 U4 - Oncology U5 - J;Article AV - English IS - 0020-7136 UR - ISI:000166159300022 L2 - HPV;mexico;normal cytology;population-based studies;HUMAN-PAPILLOMAVIRUS INFECTION; RISK-FACTORS; SEXUAL-ACTIVITY; YOUNG-WOMEN; CANCER; DETERMINANTS; PREVALENCE; WORLDWIDE; AGE; DYSPLASIA SO - International Journal of Cancer 2001 ;91(3):412-420 3433 UI - 12447 AU - Lazcano-Ponce EC AU - Miquel JF AU - Munoz N AU - Herrero R AU - Ferrecio C AU - Wistuba II AU - de Ruiz PA AU - Urista GA AU - Nervi F AD - Natl Publ Hlth Inst, Populat Hlth Res Ctr, Cuernavaca, Morelos, MexicoCatholic Univ, Dept Gastroenterol, Santiago, ChileInt Agcy Res Canc, Lyon, FranceCosta Rica Canc Inst, San Jose, Costa RicaCatholic Univ Chile, Dept Publ Hlth, Santiago, ChileCatholic Univ Chile, Dept Pathol, Santiago, ChileAutonomous Natl Univ Mexico, Mexico Gen Hosp, Cytopathol Lab, Mexico City, DF, MexicoLazcano-Ponce, EC, Natl Publ Hlth Inst, Populat Hlth Res Ctr, Cuernavaca, Morelos, Mexico TI - Epidemiology and molecular pathology of gallbladder cancer AB - Gallbladder cancer is usually associated with gallstone disease, late diagnosis, unsatisfactory treatment, and poor prognosis, We report here the worldwide geographical distribution of gallbladder cancer, review the main etiologic hypotheses, and provide some comments on perspectives for prevention. The highest incidence rate of gallbladder cancer is found among populations of the Andean area, North American Indians, and Mexican Americans. Gallbladder cancer is up to three times higher among women than men in all populations. The highest incidence rates in Europe are found in Poland, the Czech Republic, and Slovakia. Incidence rates in other regions of the world are relatively low. The highest mortality rates are also reported from South America, 3.5-15.5 per 100,000 among Chilean Mapuche Indians, Bolivians, and Chilean Hispanics. Intermediate rates, 3.7 to 9.1 per 100,000, are reported from Peru, Ecuador, Colombia, and Brazil. Mortality rates are low in North America, with the exception of high rates among American Indians in New Mexico (11.3 per 100,000) and among Mexican Americans. The main associated risk factors identified so far include cholelithiasis (especially untreated chronic symptomatic gallstones), obesity, reproductive factors, chronic infections of the gallbladder, and environmental exposure to specific chemicals. These suspected factors likely represent promoters of carcinogenesis. The main limitations of epidemiologic studies on gallbladder cancer are the small sample sizes and specific problems in quantifying exposure to putative risk factors. The natural history of gallbladder disease should be characterized to support the allocation of more resources for early treatment of symptomatic gallbladder disease in high-risk populations. Secondary prevention of, gallbladder cancer could be effective if supported by cost-effective studies of prophylactic cholecystectomy among asymptomatic gallstone patients in high-risk areas MH - Chile MH - Costa Rica MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 78 U4 - Oncology U5 - J;Review AV - English IS - 0007-9235 UR - ISI:000171967400004 L2 - EXTRAHEPATIC BILE-DUCTS; SYMPTOMATIC GALLSTONE DISEASE; HIGH-RISK AREA; P53 PROTEIN IMMUNOREACTIVITY; POLYMERASE CHAIN-REACTION; RAS CODON-12 MUTATIONS; BILIARY-TRACT CANCER; GALL STONE DISEASE; K-RAS; POINT MUTATIONS SO - Ca-A Cancer Journal for Clinicians 2001 ;51(6):349-364 3434 UI - 14261 AU - Lazo-Cortes M AU - Ruiz-Shulcloper J AU - ba-Cabrera E AD - Minist Ciencia Tecnol & Medio Ambiente, Inst Cibernet Matemat & Fis, La Habana 10400, CubaIPN, CINVESTAV, Secc Computac, Dept Ingn elect, Mexico City 07300, DF, MexicoIPN, CIC, Mexico City 07300, DF, MexicoLazo-Cortes, M, Minist Ciencia Tecnol & Medio Ambiente, Inst Cibernet Matemat & Fis, E 309 Esq A 15 Vedado, La Habana 10400, Cuba TI - An overview of the evolution of the concept of testor AB - In this paper, the historical evolution of the concept of testor is presented. Testers in a bivalued logic, in a k-valued logic, and also in a fuzzy logic are considered, particular considerations about each case are expressed. This concept evolution is presented to English readers for the first time. The authors reviewed this history because testor, in each particular formulation, is an interesting tool for feature selection problems, especially when the descriptions of objects are non-classical. (C) 2001 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0031-3203 UR - ISI:000167019700002 L2 - Testor;feature selection;feature combination;discriminating features;DIFFERENTIAL-DIAGNOSIS SO - Pattern Recognition 2001 ;34(4):753-762 3435 UI - 14126 AU - Le Vay L AU - Jones DA AU - Puello-Cruz AC AU - Sangha RS AU - Ngamphongsai C AD - Univ Coll N Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, WalesCtr Invest Alimentac & Desarrollo, AC Unidad Mazatlan Acuiculturo & Manejo Ambiental, Mazatlan 82210, Sinaloa, MexicoChulalongkorn Univ, Natl Ctr Genet Engn & Biotechnol, Aquat Resources Res Unit, Bangkok, ThailandLe Vay, L, Univ Coll N Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, Wales TI - Digestion in relation to feeding strategies exhibited by crustacean larvae AB - Decapod crustaceans have adopted a full range of reproductive strategies from the release of large numbers of small eggs (Penaeoidea) to the release of relatively low numbers of large advanced larvae (Nephropidae). As larval size determines trophic position in planktonic food webs, all food sources from phyto- to zooplankton are exploited, with many species changing trophic level during ontogenetic development. Comparative studies on digestive enzymes, levels of activity and changes during ontogeny, together with measurements of gastroevacuation rates and food energy values appear to reveal a general pattern. While herbivorous decapod larvae adapt to low food energy values with high enzyme activity levels, rapid food turnover and low assimilation efficiency, carnivorous larvae exhibit low levels of enzyme activity but compensate by extending retention time of high-energy food to maximise assimilation efficiency. New studies on digestive enzyme levels during development in the penaeid Litopenaeus vannamei, the caridean Lysmata debelius and the cirriped Elminius modestus, appear to agree with previous observations. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Sinaloa MH - Thailand MH - United Kingdom PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology;Physiology;Zoology U5 - J;Article AV - English IS - 1095-6433 UR - ISI:000167568300015 L2 - digestion;enzyme;trypsin;crustacea;larvae;Litopenaeus;Elminius;Lysmata;PENAEUS-MONODON FABRICIUS; ENZYME-ACTIVITY; BIOCHEMICAL-COMPOSITION; SETIFERUS CRUSTACEA; TRYPSIN ACTIVITY; FISH LARVAE; DECAPODA; PENAEIDAE; ENERGY; PHYSIOLOGY SO - Comparative Biochemistry and Physiology A-Molecular & Integrative Physiology 2001 ;128(3):623-630 3436 UI - 12965 AU - Le G AU - Blanco-Cano X AU - Russell CT AU - Zhou XW AU - Mozer F AU - Trattner KJ AU - Fuselier SA AU - Anderson BJ AD - Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Space Sci Lab, Berkeley, CA 94720, USALockheed Martin Palo Alto Res Lab, Palo Alto, CA 94304, USAJohns Hopkins Univ, Appl Phys Lab, Laurel, MD, USALe, G, NASA, Goddard Space Flight Ctr, Extraterr Phys Lab, Greenbelt, MD 20771 USA TI - Electromagnetic ion cyclotron waves in the high-altitude cusp: Polar observations AB - High-resolution magnetic field data from the Polar Magnetic Field Experiment (NIFE) show that narrowband waves at frequencies similar to0.2-3 Hz are a permanent feature in the vicinity of the polar cusp. The waves have been found in the magnetosphere adjacent to the cusp (both poleward and equatorward of the cusp) and in the cusp itself. The occurrence of waves is coincident with. depression of magnetic field strength associated with enhanced plasma density, indicating the entry of magnetosheath plasma into the cusp region. The wave frequencies are generally scaled by the local proton cyclotron frequency and vary between 0.2 and 1.7 times local proton cyclotron frequency. This suggests that the waves are generated in the cusp region by the precipitating magnetosheath plasma. The properties of the waves are highly variable. The waves exhibit both left-handed and right-handed polarization in the spacecraft frame. The propagation angles vary from nearly parallel to nearly perpendicular to the magnetic field. We find no correlation among wave frequency, propagation angle, and polarization. Combined magnetic field and electric field data for the waves indicate that the energy flux of the waves is guided by the background magnetic field and points downward toward the ionosphere MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000170739600049 L2 - LOW-FREQUENCY WAVES; VIKING SATELLITE; HOT PLASMA; MAGNETOSHEATH; REGION; PRECIPITATION; INSTRUMENT; ELECTRON; MISSION; CLEFT SO - Journal of Geophysical Research-Space Physics 2001 ;106(A9):19067-19079 3437 UI - 12619 AU - Lebron ME AU - Rodriguez LF AU - Lizano S AD - Univ Nacl Autonoma Mexico, Inst Astron, Unidad Morelia, Morelia 58089, Michoacan, MexicoMax Planck Inst Radioastron, D-53121 Bonn, GermanyLebron, ME, Univ Nacl Autonoma Mexico, Inst Astron, Unidad Morelia, Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico TI - Observations of the ionized, neutral, and molecular components associated with an expanding H II region AB - We present H92 alpha, H I 21 cm, NH3 (1, 1) and NH3 (2, 2) lines and radio continuum observations toward the compact H II region G111.61+0.37, located in the region Sharpless 159. The dense molecular gas (traced by the ammonia lines) in the vicinity of G111.61+0.37 is distributed in clumps indicating considerable inhomogeneity in the molecular gas. A warm (T-rot = 47 K) ammonia clump is located just in front of the head of the cometary H II region. The photodissociated region associated to this compact H II region was detected in the H I 21 cm line. The neutral region is extended in the direction opposite to the dense molecular gas. The velocity distribution of the neutral gas suggests that the H I region is expanding in a champagne flow resembling that of the H II region, although with much lower velocities MH - Germany MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000171652000028 L2 - HII regions;radio lines : ISM;stars : early-type;stars : formation;ISM : clouds;SMALL-SCALE STRUCTURE; RADIO RECOMBINATION LINES; MAIN-SEQUENCE STARS; PHOTODISSOCIATION REGIONS; VLA OBSERVATIONS; IRAS SOURCES; INTERSTELLAR-MEDIUM; PHYSICAL-PROPERTIES; CO OBSERVATIONS; GALACTIC PLANE SO - Astrophysical Journal 2001 ;560(2):806-820 3438 UI - 14470 AU - Lebsky VK AU - Gonzalez-Bashan LE AU - Bashan Y AD - Ctr Biol Res NW, La Paz 23000, BCS, MexicoPontificia Univ Javeriana, Dept Biol, Santafe De Bogota, ColombiaBashan, Y, Ctr Biol Res NW, POB 128, La Paz 23000, BCS, Mexico TI - Ultrastructure of interaction in alginate beads between the microalga Chlorella vulgaris with its natural associative bacterium Phyllobacterium myrsinacearum and with the plant growth-promoting bacterium Azospirillum brasilense AB - Chlorella vulgaris, a microalga often used in wastewater treatment, was coimmobilized and coincubated either with the plant growth-promoting bacterium Azospirillum brasilense, or with its natural associative bacterium Phyllobacterium myrsinacearum, in alginate beads designed for advanced wastewater treatment. Interactions between the microalga and each of the bacterial species were followed using transmission electron microscopy for 10 days. Initially, most of the small cavities within the beads were colonized by microcolonies of only one microorganism, regardless of the bacterial species cocultured with the microalga. Subsequently, the bacterial and microalgal microcolonies merged to form large, mixed colonies within the cavities. At this stage, the effect of bacterial association with the microalga differed depending on the bacterium present. Though the microalga entered a senescence phase in the presence of P. myrsinacearum, it remained in a growth phase in the presence of A. brasilense. This study suggests that there are commensal interactions between the microalga and the two plant associative bacteria, and that with time the bacterial species determined whether the outcome for the microalga is senescence or continuous multiplication MH - Colombia MH - Mexico|Baja California Sur PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000166600000001 L2 - Azospirillum;Chlorella;phyllobacterium;wastewater treatment;water bioremediation;ROOT-SURFACE COLONIZATION; WASTE-WATER; P-REMOVAL; WHEAT; CD; COIMMOBILIZATION; MICROORGANISMS; IDENTIFICATION; IMMOBILIZATION; LOCALIZATION SO - Canadian Journal of Microbiology 2001 ;47(1):1-8 3439 UI - 13001 AU - Lecours AR AU - Mandujano M AU - Romero G AD - Univ Montreal, Dept Med, Inst Geriatr, Quebec City, PQ, CanadaNatl Inst Pediat, Lab Dev Neurol, Mexico City, DF, MexicoMetropolitan Autonomous Univ Mexico, Mexico City, DF, MexicoLecours, AR, Univ Montreal, Dept Med, Inst Geriatr, Quebec City, PQ, Canada TI - Ontogeny of brain and cognition: Relevance to nutrition research MH - Canada MH - Mexico|Distrito Federal PB - LAWRENCE: INT LIFE SCIENCES INST RP - NOT IN FILE U3 - TC 1 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0029-6643 UR - ISI:000170666200003 SO - Nutrition Reviews 2001 ;59(8):S7-S11 3440 UI - 12427 AU - Ledesma-Vazquez J AU - Johnson ME AD - UABC, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoWilliams Coll, Dept Geosci, Williamstown, MA 01267, USALedesma-Vazquez, J, UABC, Fac Ciencias Marinas, AP 453, Ensenada 22800, Baja California, Mexico TI - Miocene pleistocene tectono-sedimentary evolution of Bahia concepcion region, Baja California sur (Mexico) AB - Bahia Concepcion is one of the largest fault-bound bays in the Gulf of California. It is one of the area's best examples of an extensional basin, and an accommodation zone related to the Late Miocene extension in the Gulf of California region. Extensional tectonics in the Gulf region initiated from middle to early Late Miocene, in a simple cast-west manner. The units within the Comondu Group are tilted between 14 and 45 degrees in opposite directions (E/W), as a direct result of a single main extensional episode. This event produced subsidence that created the depocenters for nearshore marine basins. The oldest sedimentary units present in the region are assigned to the Late Miocene-early Pliocene Tirabuzon Formation. Up-faulted granodiorite basement occurs on the Peninsula Concepcion, and at Punta San Antonio as a direct result of the Late Miocene extensional episode. Extension on the Bahia Concepcion zone was responsible for development of a divided half-graben structure first flooded in Late Pliocene time. The tectono-sedimentary evolution of Bahia Concepcion is recorded by three stratigraphic stages: (1) pre-rift strata represented by the Comondu Group. (2) a syn-rift unconformity, and (3) a post-rift strata represented by the Late Miocene to Pliocene flat laying sedimentary units. This triad of stratigraphic stages clearly varies from other basins along the margin of the Gulf of California. Upper Pleistocene terrace deposits generally conform to the 6-12 m elevation regionally associated with substage 5e. Their uniformity in elevation inside and outside Bahia Concepcion indicates that tectonic uplift was locked in step throughout the immediate region at least since that time. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000171968500005 L2 - half-graben;miocene;pliocene;pleistocene;extensional basin;GULF; EXTENSION; SERIES; LORETO SO - Sedimentary Geology 2001 ;144(1-2):83-96 3441 UI - 13142 AU - Ledesma M AU - Alva C AU - Gomez FD AU - Sanchez-Soberanis A AU - Diaz EDY AU - itez-Perez C AU - Herrera-Franco R AU - Arguero R AU - Feldman T AD - Cardiol Hosp, Natl Med Ctr 21st Century, Mexican Inst Social Secur, Mexico City, DF, MexicoUniv Chicago Hosp, Chicago, IL 60637, USALedesma, M, Privada Corregidora 5, Mexico City 10200, DF, Mexico TI - Results of stenting for aortic coarctation AB - We describe follow-up (mean 23.4 +/- 13 months) after stenting for aortic coarctation in 54 patients. The residual pressure gradient by echocardiography was 7 +/- 10 mm Hg, and all patients are currently asymptomatic with normal femoral pulses MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 19 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000170344300031 L2 - CONGENITAL HEART-DISEASE; BALLOON-EXPANDABLE STENTS; SHORT-TERM; ANOMALIES REGISTRY; ANGIOPLASTY; IMPLANTATION; VALVULOPLASTY; EXPERIENCE SO - American Journal of Cardiology 2001 ;88(4):460-+ 3442 UI - 12100 AU - Ledesma N AU - Fehervari T AU - Casaubon MT AU - Lucio E AU - Ratz F AD - Natl Autonomous Univ Mexico, Fac Vet Med & Zootechnique, Dept Anim Prod Poultry, Mexico City 04510, DF, MexicoAppl Invest Co, Puebla 75700, MexicoCent Vet Inst, Dept Histopathol & Electronmicroscopy, H-1149 Budapest, HungaryLedesma, N, Natl Autonomous Univ Mexico, Fac Vet Med & Zootechnique, Dept Anim Prod Poultry, Av Univ 3000, Mexico City 04510, DF, Mexico TI - Chicken infectious anemia in Mexico: Virus identification and serology survey AB - Three chicken infectious anemia (CIA) virus strains were isolated from 10 different sick broiler and replacement chicken flocks with the MDCC-MSB1 cell line. One-day-old specific-pathogen-free chicks were inoculated later, with the three original samples being positive in tissue culture; one induced signs and lesions, another only lesions typical for CIA. One isolate was selected for further trials and showed resistance to chloroform and heat (75 C for 5 min) and passed through a 45-nm filter membrane but did not pass through the 22-nm filter. These characteristics were similar to the Del Rose reference strain of chicken anemia virus. By electron microscopy, the diameter of particles obtained from the pellet of infected cell cultures was between 22 and 27 nm. Serology survey carried out with 580 serum samples from different poultry farms all over the country with a commercial enzyme-linked immunosorbent assay kit gave proof of widespread seroconversion, indicating that CIA should be considered endemic to Mexico MH - Hungary MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000172998200002 L2 - anemia;chicken;virus isolation;serology survey;Mexico;UNITED-STATES; AGENT CAA; BROILERS; DISEASE SO - Avian Diseases 2001 ;45(4):788-796 3443 UI - 12351 AU - Ledig FT AU - Capo-Arteaga MA AU - Hodgskiss PD AU - Sbay H AU - Flores-Lopez C AU - Conkle MT AU - Bermejo-Velazquez B AD - USDA, Forest Serv, Pacific SW Res Stn, Inst Forest Genet, Placerville, CA 95667, USAUniv Autonoma Agraria Antonio Narro, Dept Forestal, Saltillo, Coahuila, MexicoCtr Natl Rech Forestiere, Serv Genet & Ameliorat Arbres Forestieres, Chaira Omar Iban El Khattab, Rabat, MoroccoColegio Postgrad Ciencias Agricolas, Inst Recursos Nat, Programa Forestal, Mexico City 56230, DF, MexicoUniv Autonoma Chapingo, Ctr Genet Forestal, Mexico City 56230, DF, MexicoLedig, FT, USDA, Forest Serv, Pacific SW Res Stn, Inst Forest Genet, 2480 Carson Rd, Placerville, CA 95667 USA TI - Genetic diversity and the mating system of a rare Mexican pinon, Pinus pinceana, and a comparison with Pinus maximartinezii (Pinaceae) AB - Weeping pinon (Pinus pinceana) has a restricted and fragmented range, trees are widely scattered within populations, and reproduction is limited. Nevertheless, genetic diversity was high; based on 27 isozyme loci in 18 enzyme systems, unbiased expected heterozygosity averaged 0.174. Differentiation also was high (F-sr = 0.152), reflecting isolation between southern, central, and northern fragments of the range. Among populations in the northern fragment, F-sr was only 0.056, and the number of migrants per generation (Nm) was 4.21, which should preclude fixation. Nm between central and southern populations or between them and populations in the northern fragment was lower, 0.99-1.66, indicating a degree of genetic isolation. Multilocus outcrossing rates (t(m)) ranged from 0.836 in the south to 0.897 in the north. Therefore, selling is low but statistically significant. The equilibrium inbreeding coefficient (F-e) calculated from t(m) was in good agreement with observed inbreeding coefficients, suggesting that weeping pinon may be near equilibrium with respect to inbreeding and selection against selfed trees. Weeping pinon was variable at all loci polymorphic in maxipinon (Pinus maximartinezii) and, therefore, qualities as a possible progenitor of maxipinon. Because of the high level of diversity, reasonable levels of gene flow within the northern fragment of weeping pinon's range, high rates of outcrossing, and, perhaps, only weak selection against inbred trees, protection in reserves would be a viable option for conservation MH - USA MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Morocco PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000172277500006 L2 - endangered species;fitness;fragmentation;genetic distance;genetic structure;isozymes;pollen allele frequencies;selfing;POPULATION; DIFFERENTIATION; HETEROZYGOSITY; EXTINCTION; DISTANCE; ALLELES; PINYON; FLOW SO - American Journal of Botany 2001 ;88(11):1977-1987 3444 UI - 13294 AU - Lee OY AU - Mayer EA AU - Schmulson M AU - Chang L AU - Naliboff B AD - Univ Calif Los Angeles, Sch Med, CURE Digest Dis Res Ctr, Neuroenter Dis Program,Dept Med, Los Angeles, CA, USAUniv Calif Los Angeles, Sch Med, CURE Digest Dis Res Ctr, Neuroenter Dis Program,Dept Physiol, Los Angeles, CA, USAVA Greater Los Angeles Healthcare Syst, Dept Psychol, Los Angeles, CA, USAHanyang Univ, Dept Med, Coll Med, Seoul, South KoreaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City, DF, MexicoNaliboff, B, Univ Calif Los Angeles, CURE Neuroenter Dis program, WLA VA Greater Los Angeles Healthcare Syst, 11301 Wilshire Blvd,Bldg 115,Room 223, Los Angeles, CA 90073 USA TI - Gender-related differences in IBS symptoms AB - OBJECTIVE: Women are more likely than men to report irritable bowel syndrome (IBS) symptoms as well as chronic visceral and musculoskeletal pain. The study tests the general hypothesis that female IBS patients differ from their male counterparts in symptoms related to the viscera and musculoskeletal system, and that these differences are related to the menstrual cycle. METHODS: Seven hundred fourteen Rome positive IBS patients were evaluated for GI and extracolonic symptoms, psychological symptoms (SCL-90R), and quality of Life (QOL) (SF-36). In addition, 54 postmenopausal women were compared with 61 premenopausal women and 54 age-matched mates, all with IBS. RESULTS: Male and female subjects reported similar GI levels of symptom;severity and psychological problems. Abdominal distension associated with a sensation of bloating was more commonly reported by female patients, as were symptoms of constipation. Female patients more often reported nausea, alterations of taste and smell, and unpleasant sensations on the tongue, muscle stiffness in the morning, greater food sensitivity, and side effects from medications. Forty percent of female patients reported menstrual cycle-related worsening of symptoms, but few symptom differences were found between pre- and postmenopausal women, making it unlikely that most of the gender differences observed are directly tied to the menstrual cycle. CONCLUSIONS: Female patients report higher levels of a variety of intestinal and nonintestinal sensory symptoms despite similar levels of IBS severity, abdominal pain, psychological symptoms, and illness impact. The apparent differences in sensitivity to nonpainful visceral sensations, medications, and food may represent altered sensory processes, autonomic responses, and/or cognitive hypervigilance. (C) 2001 by Am. Coll. of Gastroenterology MH - USA MH - Mexico|Distrito Federal MH - South Korea PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 59 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0002-9270 UR - ISI:000169839600038 L2 - IRRITABLE-BOWEL-SYNDROME; CHRONIC PAIN; GENERAL-POPULATION; MENSTRUAL-CYCLE; INTESTINAL GAS; EPIDEMIOLOGY; CONSTIPATION; PREVALENCE; DIAGNOSIS; FEMALES SO - American Journal of Gastroenterology 2001 ;96(7):2184-2193 3445 UI - 11920 AU - Lee WH AU - Kluzniak W AU - Nix J AD - Univ Nacl Autonoma Mexico, Inst Astronomia, Mexico City 04510, DF, MexicoCopernicus Astron Ctr, PL-00716 Warsaw, PolandZielona Gora Univ, Inst Astron, PL-65265 Zielona Gora, PolandLee, WH, Univ Nacl Autonoma Mexico, Inst Astronomia, Apdo Postal 70-264 Cd Univ, Mexico City 04510, DF, Mexico TI - Binary coalescence of a strange star with a black hole: Newtonian results AB - We present Newtonian three-dimensional hydrodynamical simulations of the merger of quark stars with black holes. The initial conditions correspond to non-spinning stars in Keplerian orbits, the code includes gravitational radiation reaction in the quadrupole approximation for point masses. We find that the quark star is disrupted, forming transient accretion structures around the black hole, but 0.03 of the original stellar mass survives the initial encounter and remains in an elongated orbit as a rapidly rotating quark starlet, in all cases. No resolvable amount of mass is dynamically ejected during the encounters - the black hole eventually accretes 99.99% +/- 0.01% of the quark matter initially present MH - Mexico|Distrito Federal MH - Poland PB - WARSAW: COPERNICUS FOUNDATION POLISH ASTRONOMY RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0001-5237 UR - ISI:000173501600003 L2 - black hole physics;dense matter;accretion, accretion disks;GAMMA-RAY BURSTS; SMOOTHED PARTICLE HYDRODYNAMICS; TIDALLY LOCKED BINARIES; NEUTRON-STARS; COLOR SUPERCONDUCTIVITY; STIFF EQUATION; QUARK STARS; MATTER; CONVERSION; REPEATERS SO - Acta Astronomica 2001 ;51(4):331-346 3446 UI - 13290 AU - Lefloch B AU - Cernicharo J AU - Cesarsky D AU - Demyk K AU - Miville-Deschenes MA AU - Rodriguez LF AD - Observ Grenoble, Astrophys Lab, F-38041 Grenoble, FranceCSIC, Inst Estructura Mat, E-28006 Madrid, SpainMax Planck Inst Extraterr Phys, D-85741 Garching, GermanyUniv Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoLefloch, B, Observ Grenoble, Astrophys Lab, BP 53, F-38041 Grenoble, France TI - Disks around hot stars in the trifid nebula (vol 368, pg L13, 2001) MH - France MH - Germany MH - Mexico|Michoacan MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Correction AV - English IS - 1432-0746 UR - ISI:000169966600007 SO - Astronomy & Astrophysics 2001 ;372(3):L65-L65 3447 UI - 13964 AU - Lefloch B AU - Cernicharo J AU - Cesarsky D AU - Demyk K AU - Rodriguez LF AD - Observ Grenoble, Astrophys Lab, F-38041 Grenoble, FranceCSIC, Inst Estructura Mat, E-28006 Madrid, SpainMax Planck Inst Extraterr Phys, D-85741 Garching, GermanyInst Astrophys Spatiale, F-91405 Orsay, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoLefloch, B, Observ Grenoble, Astrophys Lab, BP 53, F-38041 Grenoble, France TI - Disks around hot stars in the Trifid nebula AB - We report on mid-IR observations of the central region in the Trifid nebula, carried out with ISOCAM in several broad-band infrared filters and in the low resolution spectroscopic mode provided by the circular variable filter. Analysis of the emission indicates the presence of a hot dust component (500 to 1000 K) and a warm dust component at lower temperatures (similar to 150-200 K) around several members of the cluster exciting the I-III region, and other stars undetected at optical wavelengths. Complementary VLA observations suggest that the mid-IR emission could arise from a dust cocoon or a circumstellar disk, evaporated under the ionization of the central source and the exciting star of the nebula. In several sources the 9.7 mum silicate band is seen in emission. One young stellar source shows indications of crystalline silicates in the circumstellar dust MH - France MH - Germany MH - Mexico|Michoacan MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168072400001 L2 - (ISM :) dust, extinction;(ISM :) HII regions;ISM : individual : Trifid;stars : formation;ORION NEBULA; CIRCUMSTELLAR DISKS; SPECTRUM; DUST SO - Astronomy & Astrophysics 2001 ;368(3):L13-L16 3448 UI - 12618 AU - Legrand F AU - Tenorio-Tagle G AU - Silich S AU - Kunth D AU - Cervino M AD - CNRS, Inst Astrophys Paris, F-75014 Paris, FranceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Golosiiv, UkraineObserv Midi Pyrenees, F-31400 Toulouse, FranceLegrand, F, CNRS, Inst Astrophys Paris, 98 Blvd Arago, F-75014 Paris, France TI - On the metallicity of star-forming dwarf galaxies AB - We construct three extremely different scenarios of the star formation histories applicable to a sample of dwarf galaxies, based on either their present metallicity or their luminosity. The three possible scenarios imply different mechanical energy input rates, and these we compare with the theoretical lower limits established for the ejection of processed matter out of dwarf galaxies. The comparison strongly points to the existence of extended gaseous halos in these galaxies acting as the barrier that allows galaxies to retain their metals and enhance their abundance. At the same time, our findings strongly point to a continuous star-forming process, rather than to coeval bursts, as the main contributor to the overall metallicity in our galaxy sample MH - France MH - Mexico|Puebla MH - Ukraine PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000171652000010 L2 - galaxies : abundances;galaxies : evolution;galaxies : starburst;ISM : abundances;ISM : bubbles;INTERSTELLAR-MEDIUM; IRREGULAR GALAXIES; COMPACT GALAXIES; NEARBY GALAXIES; IONIZED-GAS; EVOLUTION; STARBURSTS; ABUNDANCES; I-ZW-18 SO - Astrophysical Journal 2001 ;560(2):630-635 3449 UI - 14164 AU - Lehmann H AU - Harmanec P AU - Aerts C AU - Bozic H AU - Eenens P AU - Hildebrandt G AU - Holmgren D AU - Mathias P AU - Scholz G AU - Slechta M AU - Yang S AD - Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, GermanyCharles Univ, Astron Inst, CR-18000 Prague 8, Czech RepublicAcad Sci Czech Republ, Astron Inst, Ondrejov 25165, Bohemia, Czech RepublicAstron Inst, B-3001 Louvain, BelgiumUniv Zagreb, Fac Geodesy, Hvar Observ, Zagreb 10000, CroatiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoAstrophys Inst Potsdam, D-14482 Potsdam, GermanyBrandon Univ, Dept Phys & Astron, Brandon, MB R7A 6A9, CanadaObserv Cote Azur, F-06304 Nice 4, FranceUniv Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, CanadaLehmann, H, Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany TI - A new analysis of the radial velocity variations of the eclipsing and spectroscopic binary EN Lacertae AB - An analysis of 1236 new electronic spectra of the eclipsing binary EN Lac from four observatories and of 994 radial velocities (RV hereafter) from photographic spectra, published by several authors, has allowed us to disentangle the RV variations due to orbital motion and due to pulsations of the star. New, accurate orbital elements as well as precise values of the three pulsation periods, already known from the previous studies, were derived. The accuracy of the orbital solution has been substantially improved after the observed RV changes were properly prewhitened for the short-term oscillations. The amplitude of the dominant RV oscillation with a period of P-1 = 0(d).16916703 was found to vary with a 74 year cycle. The amplitudes of the two other RV oscillations, having periods of P-3 = 0(d).18173256 and P-2 = 0(d).17085554, vary on much shorter time scales of 674 d and 331 d, respectively. The value of P-1 derived here does not correspond to a one year alias of the value found by several authors from photometry but appears to be an intrinsic period. The time scales of the amplitude modulations found for P-1 and P-3 are in good agreement with previous photometric results. For the first time we present evidence of line profile variations of EN Lac. They correlate well with the short-term RV variations but they alternatively occur with periods corresponding either to the fundamental periods or to the first harmonics of A to P-3 An analysis of the RV scatter along the orbital phase curve for the new spectra, obtained over a relatively short interval of time, gives some indication of a sharp increase of this scatter when the stars are approaching periastron. Since this could be a signature of forced oscillations, the effect is worth further study, though it appears rather marginal at present** MH - Belgium MH - Canada MH - Croatia MH - Czech Republic MH - France MH - Germany MH - Mexico|Guanajuato PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167440000020 L2 - stars : binaries : close;stars : binaries : eclipsing;stars : binaries : spectroscopic;stars : fundamental parameters;stars : oscillations;stars : individual : EN Lac;LINE-PROFILE VARIABILITY; CEPHEI STAR 16-LACERTAE; LONG-TERM BEHAVIOR; FORCED-OSCILLATIONS; BETA; PULSATION; AMPLITUDES; SYSTEM; PARAMETERS; SEARCH SO - Astronomy and Astrophysics 2001 ;367(1):236-249 3450 UI - 12180 AU - Lekht EE AU - Pashchenko MI AU - Berulis II AD - Inst Nacl Astrofis Opt & Electr, Tonantzintla 72840, Puebla, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, Pushchino Radio Astron Observ, Pushchino 142292, RussiaLekht, EE, Inst Nacl Astrofis Opt & Electr, Luis Enrique Erro 1,Apdo Postal 51 & 216, Tonantzintla 72840, Puebla, Mexico TI - Twenty-year-long monitoring of the H2O maser S269 AB - Results of observations of the H2O maser in S269 carried out from October 1980 to February 2001 on the 22-m telescope (RT-22) of the Pushchino Radio Astronomy Observatory are presented. During the monitoring of S269, variability of the integrated flux of the maser emission with a cyclic character and an average period of 5.7 years was observed. This may be connected with cyclic activity of the central star during its formation. Emission at radial velocities of 4-7 km/s was detected. Thus, the H2O maser emission in S269 extends from 4 to 22 km/s, and is concentrated in three radial-velocity intervals: 4-7, 11-14, and 14-22 km/s. In some time intervals, the main group of emission features (14-22 km/s) had a triplet structure. The central velocity of the total spectrum is close to the velocity of the CO molecular cloud and HII region, differing from it by an amount that is within the probable dispersion of the turbulent gas velocities in the core of the CO molecular cloud. A radial-velocity drift of the component at V-LSR approximate to 20 km/s with a period of 26 years has been detected. This drift is likely due to turbulent (vortical) motions of material. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000172733800004 SO - Astronomy Reports 2001 ;45(12):949-959 3451 UI - 12741 AU - Lekht EE AU - Silant'ev NA AU - Mendoza-Torres JE AU - Pashchenko MI AU - Krasnov VV AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoRussian Acad Sci, Main Astron Observ, St Petersburg 196140, RussiaSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Pushchino Radio Astron Observ, Astrospace Ctr, Lebedev Inst Phys, Pushchino 142290, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - A study of the kinematics of the H2O maser sources S269 and W75S from long-term monitoring AB - It is shown that basic characteristics of turbulence can be derived from temporal behaviour, shape and radial-velocity drift of a spectral line. To perform this analysis, a 20-year monitoring of the H2O maser emission sources S269 and W75S was used. It is shown that the observed sinusoidal variation of the radial velocity of the main emission feature in S269 with a period of 26 years is not caused by Keplerian motion. Most likely, it results from rotation of a non-uniform turbulent vortex with a diameter of about 1 AU. Within the framework of this model, asymmetry of the emission feature at 20.1 km s(-1) and a jump of the linewidth, which took place after a strong are in 1991, are explained. In W75S anticorrelation between fluxes of several emission features with close radial velocities is found. This anticorrelation is explained by competition of spatial modes of the emission for pumping in a partially saturated maser. It is shown that in the model of a maser in an expanding envelope (which is, most likely, the case in W75S) the emission features with anticorrelated fluxes form a spatially compact group MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171457900024 L2 - masers;shock waves;turbulence;star : formation;STAR-FORMING REGIONS; WATER MASERS; DISK; TURBULENCE; EMISSION SO - Astronomy & Astrophysics 2001 ;377(3):999-1006 3452 UI - 12859 AU - Lekht EE AU - Mendoza-Torres JE AU - Rudnitskij GM AU - Tolmachev AM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, PN Lebedev Phys Inst, Astrospace Ctr, Pushchino Radio Astron Observ, Pushchino 142290, Moscow Region, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Variability of the H2O maser associated with the Mira variable RS Virginis AB - The results of observations of the H2O maser emission (lambda = 1.35 cm) of the Mira-type variable star RS Vir are presented. The observations were carried out in 1981-2001 (JD = 2 444 900 2 451 995) on the RT-22 radio telescope of the Pushchino Radio Astronomy Observatory (Russia). The variability curve of the H2O maser emission integrated flux F-int(H2O) of RS Vir correlates with its visual light curve with some phase delay Delta phi = (0.05-0.35)P (P is the star's period). The delay variations seem to be periodic at a timescale of 19-20 years ("superperiod" of the maser variations). If the variability of the H2O maser RS Vir is caused by periodic action of pulsation-driven shock waves, the shock travel time from the photosphere to the inner boundary of the H2O maser shell can be as long as (3-5)P. Another explanation is that maser variations may be connected with changing gas density in the masering region of the circumstellar envelope. In particular, long-term maser variations (the "superperiod") may be caused by changing mass loss rate (M) over dot. M MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171087200022 L2 - stars : variables : general;circumstellar matter;stars : individual : RS Vir;radio lines : stars;masers;shockwaves;LATE-TYPE STARS; SUBMILLIMETER WATER MASERS; CIRCUMSTELLAR ENVELOPES; EMISSION; VAPOR; LINE; OH; DYNAMICS; SHOCK SO - Astronomy & Astrophysics 2001 ;376(3):928-940 3453 UI - 14202 AU - Lekht EE AU - Sorochenko RL AD - Sternberg Astron Inst, Moscow 119899, RussiaNatl Inst Astrophys Phys & Elect, Tonanzintla, MexicoPN Lebedev Phys Inst, Pushchino Radio Astron Observ, Astro Space Ctr, Pushchino, Moscow Oblast, RussiaLekht, EE, Sternberg Astron Inst, Univ Skii Pr 13, Moscow 119899, Russia TI - The maser source S140-H2O as a protoplanetary disk AB - We present the observations of the H2O maser in S140 with the 22-m radio telescope of the Pushchino Radio Astronomy Observatory in 1992-1999. The H2O maser emission is mainly concentrated in three symmetrically placed narrow radial-velocity intervals. In contrast to our earlier observations (1981-1991), we did not detect emission simultaneously in all three intervals; instead, the emission appeared successively in each. We discuss possible origins for this behavior. To explain the flux variability and radial-velocity drift of the main components, we propose a model with Keplerian orbital motion of clumps (protoplanets) and calculate their orbital parameters. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000167269900005 L2 - MOLECULAR CLOUD; REGIONS SO - Astronomy Reports 2001 ;45(2):113-119 3454 UI - 12271 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AD - Escuela Nacl Estudios Profesionales Iztacala, Unidad Biol Tecnol & Prototipos, Ecol Lab, Mexico City 54090, DF, MexicoWilliam Jewell Coll, Dept Biol, Liberty, MO 64068, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USASmith, GR, Escuela Nacl Estudios Profesionales Iztacala, Unidad Biol Tecnol & Prototipos, Ecol Lab, Av Los Barrios S-N, Mexico City 54090, DF, Mexico TI - Sexual dimorphism and body temperatures of Sceloporus siniferus from Guerrero, Mexico MH - Mexico|Distrito Federal MH - USA PB - PROVO: BRIGHAM YOUNG UNIV RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1527-0904 UR - ISI:000172436700015 L2 - lizards;sexual dimorphism;Sceloporus;Mixico;thermal ecology;THERMAL ECOLOGY; LIZARD; EVOLUTION; EXAMPLE SO - Western North American Naturalist 2001 ;61(4):498-500 3455 UI - 12119 AU - Leon-Regagnon V AU - Brooks DR AU - Zelmer DA AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoLeon-Regagnon, V, Univ Toronto, Dept Zool, 25 Harbord St, Toronto, ON M5S 3G5, Canada TI - Morphological and molecular description of Haematoloechus meridionalis n. sp (Digenea : Plagiorchioidea : Haematoloechidae) from Rana vaillanti brocchi of Guanacaste, Costa Rica AB - An undescribed species of Haematoloechus inhabits the lungs of Rana vaillanti in northwestern Costa Rica. The new species is most similar morphologically to H. medioplexus, having a very small, but well-developed. ventral sucker and lacking extracecal uterine loops, and apparently was mis-identified previously as H. medioplexus in Rana palmipes from Colombia. It differs from H. medioplexus, notably by (1) the shape of the oral sucker, which is elliptical in H. meridionalis and spherical in H. medioplexus; (2) the posterior extent of the vitelline fields, which terminate at the same level in H. medioplexus, but always at different levels in H. meridionalis; (3) the position of the testes, which are immediately posterior to the seminal receptacle and are close together in the new species and far from the seminal receptacle and separated from each other in H. medioplexus; and (4) the location of the genital pore. which is ventral to the cecal bifurcation in the new species and ventral to the pharynx in H. medioplexus. In addition, the new species is unique among members of Haematoloechus by having flaps of tissue on the interior margins of the ventral sucker. The new species shows almost 5% sequence divergence from H. medioplexus in the variable D1 region of the 28s rDNA, complementing the morphological differences MH - Canada MH - Mexico|Distrito Federal PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 11 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000172910100032 L2 - HEMATOLECHUS LOOSS SO - Journal of Parasitology 2001 ;87(6):1423-1427 3456 UI - 12571 AU - Leon JA AU - Sole JL AU - Vives J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoUniv Autonoma Barcelona, Dept Matemat, E-08193 Barcelona, Spain TI - A pathwise approach to backward and forward stochastic differential equations on the Poisson space AB - We study the existence and uniqueness of pathwise solutions to backward and forward stochastic differential equations on the Poisson space. We obtain the structure of these pathwise solutions to give the relationship between them. Also, in the bilinear case. we calculate the explicit form of their chaos decompositions MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Statistics & Probability U5 - J;Article AV - English IS - 0736-2994 UR - ISI:000171628200007 L2 - INTEGRALS SO - Stochastic Analysis and Applications 2001 ;19(5):821-839 3457 UI - 12433 AU - Leon V AU - Lefebvre R AU - Atabek O AD - BUAP, Inst Fis, Puebla 72570, MexicoUniv Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, FranceUniv Paris 06, UFR Phys Fondamentale & Appl, F-75231 Paris, FranceLeon, V, BUAP, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Analysis of a case of field-induced unit transmissivity in resonant tunneling AB - We consider two barriers enclosing a well that possesses a bound state. In the presence of an oscillating field, this bound state is transformed into a resonance with a width reflecting the escape process by absorption of quanta from the field. We show that a particle incident on this device with an energy just one quantum above the bound-state energy has a transmissivity approaching unity as the amplitude of the field is reduced. The conditions for efficient transmission at this energy are examined MH - France MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000172074200014 L2 - DOUBLE-BARRIER; SCATTERING SO - Physical Review A 2001 ;6405(5): 3458 UI - 13754 AU - Leros N AU - Burnstein RA AU - Chakravorty A AU - Chan A AU - Chen YC AU - Choong WS AU - Clarke K AU - Dukes C AU - Durandet C AU - Felix J AU - Gidal G AU - Gustafson HR AU - Ho C AU - Holmstrom T AU - Huang M AU - James C AU - Jenkins M AU - Jones T AU - Kaplan DM AU - Lederman LM AU - Longo MJ AU - Lopez F AU - Lu LC AU - Luebke W AU - Luk KB AU - Moreno G AU - Nelson KS AU - Park HK AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Sosa M AU - Teng PK AU - Turko B AU - Volk J AU - White C AU - White SL AU - Zyla P AD - Univ Lausanne, IPHE, CH-1015 Lausanne, SwitzerlandFermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv Guanajuato, Leon 37000, MexicoUniv Virginia, Charlottesville, VA 22901, USAUniv S Alabama, Mobile, AL 36688, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAAcad Sinica, Taipei 11529, TaiwanIIT, Chicago, IL 60616, USALeros, N, Univ Lausanne, IPHE, CH-1015 Lausanne, Switzerland TI - HyperCP (E871) Experiment at Fermilab: search for direct CP violation in hyperon decays AB - The Fermilab HyperCP experiment has accumulated the world's largest sample of Xi (-) and <()over bar>(+) hyperon decays within two running periods in 1997 and 1999. The primary goal of the experiment is to search for direct CP <()over bar>(+) --> <()over bar> pi (+) --> (p) over bar pi (+) pi (+). manifest itself as a difference between the angular distribution of the proton and the antiproton in the Lambda and <()over bar> helicity frame. The amount of data is enough to reach a statistical sensitivity of 1.4 x 10(-4) in the CP violating asymmetry A(Xi Lambda) = (alpha (Xi) alpha (Lambda) - alpha (Xi) alpha (Lambda))/(alpha (Xi) alpha (Lambda) + alpha (<()over bar>) alpha (<()over bar>)). We present an analysis method used to take into A,+ account the slight differences in the production of the Xi (-) and samples. A preliminary result on A(Xi Lambda) at the level of a few 10(-3) and based on a few percent of the 1997 data will be presented MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000168498000025 L2 - NEUTRAL KAON; INVARIANCE SO - Nuclear Physics B-Proceedings Supplements 2001 ;99B():211-219 3459 UI - 12643 AU - Leskow J AD - Wroclaw Tech Univ, Inst Math, PL-50370 Wroclaw, PolandCIMAT, Guanajuato, MexicoLeskow, J, Wroclaw Tech Univ, Inst Math, Wybrzeze Wyspianskiego 27, PL-50370 Wroclaw, Poland TI - The impact of stationarity assessment on studies of volatility and value-at-risk AB - Recent research on volatility of asset returns demonstrates that model innovations frequently show unconditional heteroscedasticity, On the other hand, ARMA-GARCH models incorporate the heteroscedasticity only in the conditional distribution of the innovations. assuming the unconditional distributions to be stationary (see, e.g., [1,2]). Given the observed unconditional heteroscedasticity of the return innovations [3], there is a need to overcome this shortcoming of existing models. The purpose of this paper is to introduce a test of stationarity of the innovations and show its impact in the analysis of volatility and value at risk. The methodological results are accompanied with examples and simulations. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Guanajuato MH - Poland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000171451200017 L2 - value at risk;test of stationarity;ARCH MODELS SO - Mathematical and Computer Modelling 2001 ;34(9-11):1213-1222 3460 UI - 14631 AU - Lester GE AU - Arias LS AU - Gomez-Lim M AD - USDA ARS, Kika Garza Subtrop Agr Res Ctr, Weslaco, TX 78596, USAIPN, Ctr Invest & Estudios Avanzados, Dept Ingn Genet, Unidad Irapuato, Irapuato 36500, Gto, MexicoLester, GE, USDA ARS, Kika Garza Subtrop Agr Res Ctr, 2413 E Bus Hwy 83, Weslaco, TX 78596 USA TI - Muskmelon fruit soluble acid invertase and sucrose phosphate synthase activity and polypeptide profiles during growth and maturation AB - Muskmelon [Cucumis melo L. (Reticulatus Group)] fruit sugar content is the single most important consumer preference attribute. During fruit ripening, sucrose accumulates when soluble acid invertase (AI) activity is less then sucrose phosphate synthase (SPS) activity. To genetically heighten fruit sugar content, knowledge of sugar accumulation during fruit development in conjunction with AI and SPS enzyme activities and their peptide immunodetection profiles, is needed. Two netted muskmelon cultivars, Valley Gold a high sugar accumulator, and North Star a low sugar accumulator, with identical maturity indices were assayed for fruit sugars, Al and SPS activity, and immunodetection of Al and SPS polypeptides 2, 5, 10, 15, 20, 25, 30, 35, or 40 (abscission) days after anthesis (DAA). Both cultivars, grown in the Fall, 1998 and Spring, 1999, showed similar total sugar accumulation profiles. Total sugars increased 1.5 fold, from 2 through 5 DAA, then remained unchanged until 30 DAA. From 30 DAA until abscission, total sugar content increased, with 'Valley Gold' accumulating significantly more than 'North Star'. During both seasons, sucrose was detected at 2 DAA, which coincided with SPS activity higher than Al activity, at 5 through 25 DAA, no sucrose was detected which coincided with SPS activity less than Al activity. At 30 DAA when SPS activity was greater than Al activity, increased sucrose accumulation occurred. 'Valley Gold' at abscission had higher total sugar content and SPS activity, and lower AI activity than 'North Star','North Star' had Al isoforms at 75, 52, 38, and 25 kDa (ku) that generally decreased with maturation, although the isoform at 52 ku remained detectable up to anthesis (30 DAA). 'Valley Gold' had the same four Al isoforms, all decreased with maturation and became undetectable by. 20 DAA, Both 'Valley Gold' and 'North Star' had one SPS band at 58 ku that increased with DAA, and coincided with SPS activity. 'Valley Gold' had a more intense SPS polypeptide band at al,abscission than 'North Star'. Thus, netted muskmelon fruit sugar accumulation may be increased, either hy genetic manipulation or by selecting for cultivars with a specific number of down-regulated AI isoforms, and higher SPS activity during Fruit ripening MH - Mexico|Guanajuato MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Horticulture U5 - J;Article AV - English IS - 0003-1062 UR - ISI:000165974000005 L2 - Cucumis melo;sugars;immunodetection;PLANT DEVELOPMENT; TOMATO FRUIT; EXPRESSION; ACCUMULATION; METABOLISM; CLONING; CUCUMIS SO - Journal of the American Society for Horticultural Science 2001 ;126(1):33-36 3461 UI - 12604 AU - Levin Y AU - Flores-Mena JR AD - Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, BrazilUniv Autonoma Puebla, Fac Ciencias Elect, Puebla 72570, MexicoLevin, Y, Univ Fed Rio Grande Sul, Inst Fis, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, Brazil TI - Surface tension of strong electrolytes AB - We present a theory which accounts for the increase in interfacial tension of water due to the presence of 1:1 electrolyte. The agreement between the theory and experiment is excellent, extending all the way to relatively high salt concentrations of 1 M. For low concentrations of electrolyte the theory reduces to the Onsager-Samaras limiting law MH - Brazil MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 24 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000171629500005 L2 - CRITICALITY SO - Europhysics Letters 2001 ;56(2):187-192 3462 UI - 13173 AU - Lewis JL AU - Day SM AU - Magistrale H AU - Castro RR AU - Astiz L AU - Rebollar C AU - Eakins J AU - Vernon FL AU - Brune JN AD - San Diego State Univ, Dept Geol Sci, San Diego, CA 92182, USACtr Invest Cient & Educ Super Ensenada, Div Ciencias Tierra, Ensenada, Baja California, MexicoCTBTO PrepCom, A-1400 Vienna, AustriaUniv Calif San Diego, Inst Geophys & Planetary Phys, La Jolla, CA 92093, USAUniv Nevada, Seismol Lab, Reno, NV 89557, USALewis, JL, Chevron N Amer Explorat & Prod, 935 Gravier St, New Orleans, LA 70112 USA TI - Crustal thickness of the peninsular ranges and gulf extensional province in the Californias AB - We estimate crustal thickness along an east-west transect of the Baja California peninsula and Gulf of California, Mexico, and investigate its relationship to surface elevation and crustal extension. We derive Moho depth estimates from P-to-S converted phases identified on teleseismic recordings at 11 temporary broadband seismic stations deployed at similar to 31 degreesN latitude. Depth to the Moho is similar to 33 (+/-3) km near the Pacific coast of Baja California and increases gradually toward the east, reaching a maximum depth of similar to 40 (+/-4) km beneath the western part of the Peninsular Ranges batholith, The crust then thins rapidly under the topographically high eastern Peninsular Ranges and across the Main Gulf Escarpment, Crustal thickness is similar to 15-18 (+/-2) km within and on the margins of the Gulf of California. The Moho shallowing beneath the eastern Peninsular Ranges represents an average apparent westward dip of similar to 25 degrees. This range of Moho depths within the Peninsula Ranges, as well as the sharp similar to east-west gradient in depth in the eastern part of the range, is in agreement with earlier observations from north of the international border. The Moho depth variations do not correlate with topography of the eastern batholith, These findings suggest that a steeply dipping Moho is a regional feature beneath the eastern Peninsular Ranges and that a local Airy crustal root does not support the highest elevations. We suggest that Moho shallowing under the eastern Peninsular Ranges reflects extensional deformation of the lower crust in response to adjacent rifting of the Gulf Extensional Province that commenced in the late Cenozoic, Support of the eastern Peninsular Ranges topography may be achieved through a combination of flexural support and lateral density variations in the crust and/or upper mantle MH - Austria MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 14 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000169906100023 L2 - SOUTHERN SIERRA-NEVADA; NORTHEASTERN BAJA-CALIFORNIA; SALTON TROUGH; MEXICO; LITHOSPHERE; TECTONICS; VICINITY; BENEATH; MIOCENE; ORIGIN SO - Journal of Geophysical Research-Solid Earth 2001 ;106(B7):13599-13611 3463 UI - 13470 AU - Ley C AU - Mahar A AU - Guarner J AU - Herrera-Goepfert R AU - Sanchez L AU - Parsonnet J AD - Stanford Univ, Stanford, CA 94305, USAINCAN, Mexico City, DF, MexicoCtr Dis Control & Prevent, Atlanta, GA, USA TI - Change in worst biopsy diagnosis 1 year after Helicobacter pylori eradication MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0016-5085 UR - ISI:000168514703700 SO - Gastroenterology 2001 ;120(5):A744-A744 3464 UI - 14325 AU - Ley C AU - Mohar A AU - Guarner J AU - Herrera-Goepfert R AU - Figueroa LS AU - Halperin D AU - Parsonnet J AD - Stanford Univ, Dept Hlth Res & Policy, Div Epidemiol, Stanford, CA 94305, USAStanford Univ, Dept Med, Div Infect Dis & Geog Med, Stanford, CA 94305, USAInst Nacl Cancerol, Mexico City 14000, DF, MexicoUNAM, Inst Invest Biomed, Mexico City 14000, DF, MexicoCtr Dis Control & Prevent, Infect Dis Pathol Act, Atlanta, GA 30333, USAColegio Frontera Sur, Div Poblac & Salud, San Cristobal De Casas 29290, Chiapas, MexicoLey, C, Stanford Univ, Dept Hlth Res & Policy, Div Epidemiol, Stanford, CA 94305 USA TI - Screening markers for chronic atrophic gastritis in Chiapas, Mexico AB - Intestinal-type gastric adenocarcinomas usually are preceded by chronic atrophic gastritis, Studies of gastric cancer prevention often rely on identification of this condition. In a clinical trial, we sought to determine the best serological screening method for chronic atrophic gastritis and compared our findings to the published literature. Test characteristics of potential screening tests (antibodies to Helicobacter pylori or CagA, elevated gastrin, low pepsinogen, increased age) alone or in combination were examined among consecutive subjects enrolled in a study of H. pylori and preneoplastic gastric lesions in Chiapas, Mexico; 70% had chronic atrophic gastritis, English-language articles concerning screening for chronic atrophic gastritis were also reviewed. Sensitivity for chronic atrophic gastritis was highest for antibodies to H. pylori (92%) or CagA, or gastrin levels >25 ng/l (both 83%), Specificity, however, was low for these tests (18, 41, and 22%, respectively). Pepsinogen levels were highly specific but insensitive markers of chronic atrophic gastritis (for pepsinogen I<25 g/l, sensitivity was 6% and specificity was 100%; for pepsinogen I:pepsinogen II ratio <2.5, sensitivity was 14% and specificity was 96%), Combinations of markers did not improve test characteristics. Screening test characteristics from the literature varied widely and did not consistently identify a good screening strategy. In this study, CagA antibodies alone had the best combination of test characteristics for chronic atrophic gastritis screening. However, no screening test was both highly sensitive and highly specific for chronic atrophic gastritis MH - USA MH - Mexico|Chiapas MH - Mexico|Distrito Federal PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 34 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1055-9965 UR - ISI:000166922600005 L2 - HELICOBACTER-PYLORI INFECTION; SERUM PEPSINOGEN LEVELS; HIGH-RISK; PERNICIOUS-ANEMIA; LESIONS; CANCER; POPULATION; ASSOCIATION; ANTIBODIES; RELATIVES SO - Cancer Epidemiology Biomarkers & Prevention 2001 ;10(2):107-112 3465 UI - 11578 AU - Leyte-Morales GE AU - Bonilla HR AU - Cintra-Buenrostro CE AU - Glynn PW AD - Univ Mar, Inst Recursos, Puerto Angel 70902, Oaxaca, MexicoUniv Autonoma Baja California, Dept Biol Marina, La Paz 23080, Baja California, MexicoMoss Landing Marine Labs, Moss Landing, CA 95039, USAUniv Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149, USALeyte-Morales, GE, Univ Mar, Inst Recursos, Apartado Postal 47, Puerto Angel 70902, Oaxaca, Mexico TI - Range extension of Leptoseris papyracea (Dana, 1846) to the west coast of Mexico MH - Mexico|Baja California MH - Mexico|Oaxaca MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000174494400015 L2 - EASTERN PACIFIC; CORAL-REEFS; COSTA-RICA SO - Bulletin of Marine Science 2001 ;69(3):1233-1237 3466 UI - 13993 AU - Leyva E AU - Moctezuma E AU - Strouse J AU - Garcia-Garibay MA AD - Univ Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, MexicoUniv Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90024, USALeyva, E, Univ Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, Mexico TI - Spectrometric and 2D NMR studies on the complexation of chlorophenols with cyclodextrins AB - The formation and structure of inclusion complexes of alpha- and beta -cyclodextrins with 2-chlorophenol (2CP), 3-chlorophenol (3CP), 4-chlorophenol (4CP), 2,4-dichlorophenol (24DCP), 2,6-dichlorophenol (26DCP) and 3,4-dichlorophenol (34DCP) have been studied by UV-VIS and H-1 NMR spectroscopy. Both cyclodextrins were found to form 1 : 1 inclusion complexes. Binding constants estimated from titration studies revealed that the stability of the complexes was highly dependent on the structure and polarity of the chlorophenol and on the cyclodextrin used. In general, weaker binding constants were observed for a given chlorophenol with beta -cyclodextrin than with beta -cyclodextrin. The weakest binding constants (K-b < 200 M-1) were obtained for the ortho-substituted chlorophenols (2CP and 26DCP) and the largest binding constants were obtained between para-chlorophenols (4CP, 24DCP and 34DCP) and -cyclodextrin. 2D-TROESY studies of chlorophenol-cyclodextrin complexes in D2O provided insight into the structure of the complexes MH - Mexico|San Luis Potosi MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Multidisciplinary;Crystallography U5 - J;Article AV - English IS - 0923-0750 UR - ISI:000167780000006 L2 - alpha- and beta-cyclodextrin chlorophenol complexes;2D H-1 NMR TROESY;inclusion complex structures;spectrophotometry;H-1 NMR;equilibrium constants;NUCLEAR-MAGNETIC-RESONANCE; INDUCED CIRCULAR-DICHROISM; ALPHA-CYCLODEXTRIN; BETA-CYCLODEXTRIN; INCLUSION COMPLEXES; ROTATING-FRAME; AQUEOUS-SOLUTION; CHIRAL ANALYSIS; SOLID-STATE; BINDING SO - Journal of Inclusion Phenomena and Macrocyclic Chemistry 2001 ;39(1-2):41-46 3467 UI - 12953 AU - Leyvraz F AU - Lombardi M AU - Seligman TH AD - Univ Grenoble 1, CNRS UMR 5588, Spectrometrie Phys Lab, F-38402 St Martin Dheres, FranceUNAM, Ctr Ciencias Fis, Col Chamilpa, Morelos, MexicoCtr Int Cienicas, Cuernavaca, Morelos, MexicoLombardi, M, Univ Grenoble 1, CNRS UMR 5588, Spectrometrie Phys Lab, BP87, F-38402 St Martin Dheres, France TI - A diffusion model for classical chaotic compound scattering AB - We consider the classical map proposed previously to be the exact classical analog of Rydberg molecules calculated with the approximations relevant to the multi-channel quantum defect theory. The resulting classical map is analyzed at energies above the threshold for the Rydberg electron. At energies very near to this threshold we find the possibility of bounded motion for positive energy due to conserved tori as well as the possibility of forming a compound system, i.e., a system where the particle is trapped for long times before emerging again to the continuum. The compound scattering displays unusual features for short-time behavior. A diffusion model explains these features. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000170674100001 L2 - chaotic scattering;Rydberg molecule;diffusion model;MOLECULAR RYDBERG STATES; QUANTUM DEFECT THEORY; POINCARE RECURRENCES; MAP SO - Physica D 2001 ;157(3):169-185 3468 UI - 13952 AU - Lezama-Gutierrez R AU - Hamm JJ AU - Molina-Ochoa J AU - Lopez-Edwards M AU - Pescador-Rubio A AU - Gonzalez-Ramirez M AU - Styer EL AD - Univ Colima, Fac Ciencias Biol & Agropecuarias, Tecoman 28100, Colima, MexicoARS, Crop Protect & Management Res Unit, USDA, Tifton, GA 31793, USAUniv Colima, Ctr Univ Invest & Desarrollo Agropecuario, Tecoman 28100, Colima, MexicoUniv Georgia, Diagnost & Invest Lab, Tifton, GA 31793, USALezama-Gutierrez, R, Univ Colima, Fac Ciencias Biol & Agropecuarias, Apartado Postal 36, Tecoman 28100, Colima, Mexico TI - Occurrence of entomopathogens of Spodoptera frugiperda (Lepidoptera : Noctuidae) in the Mexican states of Michoacan, Colima, Jalisco and Tamaulipas AB - Fall armyworm, Spodoptera frugiperda (J. E. Smith) (FAW) larvae and soil samples were collected from corn and sorghum fields in the Mexican states of Michoacan, Colima, and Jalisco during August 1998. Additional FAW larvae were collected from a sorghum field in Tamaulipas, Mexico in September. A total of 2219 FAW larvae from 20 locations and 76 soil samples from 19 locations were examined for indigenous FAW biological control agents. Four species of entomopathogenic fungi representing two classes, Zygomycetes (Entomophthorales) and Hyphomycetes (Beauveria bassiana, Nomuraea rileyi, and Hirsutella sp.) were recovered from 43 (1.94%) of FAW larvae. An unidentified microsporidian was collected from 32 (1.44%) of FAW larvae, 29 from Colima, 2 from Jalisco, and 1 from Michoacan. Forty nine larvae (2.21%) parasitized by mermithid nematodes were collected in the state of Colima. Two (0.09%) larvae infected with ascovirus were collected in Tamaulipas. Three species of Hyphomycetes (Paecilomyces fumosoroesus, B. bassiana, and Metarhizium anisopliae) were isolated from soil samples using Galleria mellonella larval traps. Entomopathogenic nematodes (Steinernema sp. and Heterorhabditis sp.) were recovered from soil samples from 5 of 19 localities using Galleria mellonella larval traps. Bacillus thuringiensis was isolated from soil samples from 12 locations. The most widely distributed microbial control agent on FAW larvae in the Western Coast of Mexico was the fungus N. rileyi, and from soil were the bacterium B, thuringiensis and steinernematid nematodes. The microsporidian was found predominantly in Colima and the mermithid nematodes only in Colima. Thus, Colima had the highest total percent mortality (9.67%) due to fungi, microsporidia and mermithids MH - Mexico|Colima MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000168101100003 L2 - fall armyworm;biological control;maize;Nomuraea rileyi;mermithid nematode;microsporidia;COTESIA-MARGINIVENTRIS HYMENOPTERA; FALL ARMYWORM; HELIOTHIS-ZEA; HOST-RANGE; FUNGI; SOIL; PARASITOIDS; BRACONIDAE; NEMATODES; SORGHUM SO - Florida Entomologist 2001 ;84(1):23-30 3469 UI - 12303 AU - Lezama R AU - Castillo A AU - Luduena RF AU - Meza I AD - IPN, CINVESTAV, Dept Biomed Mol, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Biol Celular, Mexico City 07360, DF, MexicoUniv Texas, Dept Biochem, San Antonio, TX 78285, USAMeza, I, IPN, CINVESTAV, Dept Biomed Mol, Apartado 14-740, Mexico City 07360, DF, Mexico TI - Over-expression of beta I tubulin in MDCK cells and incorporation of exogenous beta I tubulin into microtubules interferes with adhesion and spreading AB - Little is known about the presence and distribution of tubulin isotypes in MDCK cells although essential epithelial functions in these monolayers are regulated by dynamic changes in the microtubule architecture. Using specific antibodies, we show here that the betaI, beta II, and beta IV isotypes are differentially distributed in the microtubules of these cells. Microtubules in subconfluent cells radiating from the perinuclear region contain betaI and beta II tubulins, while those extending to the cell edges are enriched in beta II. Confluent cells contain similar proportions of betaI and beta II along the entire microtubule length. beta IV is the less abundant isotype and shows a similar distribution to beta II. The effect of modifying tubulin isotype ratios in the microtubules that could affect their dynamics and function was analyzed by stably expressing in MDCK cells betaI tubulin from CHO cells. Three recombinant clones expressing different levels of the exogenous betaI tubulin were selected and subcloned. Clone 17-2 showed the highest expression of CHO betaI tubulin. Total betaI tubulin levels (MDCK+CHO) in the clones were approximately 1.8 to 1.1-fold higher than in mock-transfected cells only expressing MDCK betaI tubulin. In all the cells, beta II tubulin levels remained unchanged. The cells expressing CHO betaI tubulin showed defective attachment, spreading, and delayed formation of adhesion sites at short times after plating, whereas mock-transfected cells attached and spread normally. Analysis of cytoskeletal fractions from clone 17-2 showed a MDCK betaI/CHO betaI ratio of 1.89 at 2 h that gradually decreased to 1.0 by 24 h. The ratio of the two isotypes in the soluble fraction remained unchanged, although with hi-her values than those found for the polymerized betaI tubulin. By 24 h, the transfected cells had regained normal spreading and formed a confluent monolayer. Our results show that excess levels of total betaI tubulin, resulting from the expression of the exogenous betaI isotype, and incorporation of it into microtubules affect their stability and some cellular functions. As the levels return to normal, the cells recover their normal phenotype. Regulation of betaI tubulin levels implies the release of the MDCK betaI isotype from the microtubules into the soluble fraction where it would be degraded. (C) 2001 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology U5 - J;Article AV - English IS - 0886-1544 UR - ISI:000172426400003 L2 - tubulin isotypes ratio;epithelial cell functions;MDCK cells;PROSTATE CARCINOMA-CELLS; CANINE KIDNEY-CELLS; HAMSTER OVARY CELLS; EPITHELIAL-CELLS; ALPHA-TUBULIN; ISOTYPES; PROTEINS; POLARIZATION; RESISTANCE; NUCLEATION SO - Cell Motility and the Cytoskeleton 2001 ;50(3):147-160 3470 UI - 14228 AU - Leznov AN AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, RussiaLeznov, AN, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - To the Gel'fand-Tsetlin realization of irreducible representations of classical semisimple algebras AB - It is shown that the Gel'fand-Tsetlin realization of irreducible representations of the A(n) algebra is directly connected with a linear exactly integrable system in the n-dimensional space. General solutions for this system is explicitly given. (C) 2001 American Institute of Physics MH - Mexico|Morelos MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000167133200027 SO - Journal of Mathematical Physics 2001 ;42(3):1384-1396 3471 UI - 14454 AU - Leznov AN AD - Res Ctr Engn & Appl Sci, Cuernavaca 62210, Morelos, MexicoInst High Energy Phys, Protvino 142284, Moscow Region, RussiaLeznov, AN, Res Ctr Engn & Appl Sci, Av Univ 1001 Col, Cuernavaca 62210, Morelos, Mexico TI - UV manifold and integrable systems in spaces of arbitrary dimension AB - The 2n dimensional manifold with two mutually commutative operators of differentiation is introduced. Nontrivial multidimensional integrable systems connected with arbitrary graded ( semisimple) algebras are constructed. The general solution of them is presented in explicit form MH - Mexico|Morelos MH - Russia PB - LULEA: NORBERT EULER RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 1402-9251 UR - ISI:000166526100001 L2 - ALGEBRAS SO - Journal of Nonlinear Mathematical Physics 2001 ;8(1):1-7 3472 UI - 13097 AU - Li PZ AU - Go XG AU - Arellano RO AU - Renugopalakrishnan V AD - Harvard Univ, Sch Med, Boston, MA 02115, USAChinese Acad Sci, Shanghai Res Ctr Biotechnol, Shanghai 200233, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, MexicoBiosemicond, USA, Atlanta, GA 30338 USARenugopalakrishnan, V, Harvard Univ, Sch Med, Boston, MA 02115, USA TI - Glycosylated and phosphorylated proteins - Expression in yeast and oocytes of Xenopus: Prospects and challenges - Relevance to expression of thermostable proteins AB - Phosphorylation and glycosylation are important posttranslational events in the biosynthesis of proteins. The different degrees of phosphorylation and glycosylation of proteins have been an intriguing phenomenon. Advances in genetic engineering have made it possible to control the degree of glycosylation and phosphorylation of proteins. Structural biology of phosphorylated and glycosylated proteins has been advancing at a much slower pace due to difficulties in using high-resolution NMR studies in solution phase. Major difficulties have arisen from the inherent mobilities of phosphorylated and glycosylated side chains. This paper reviews molecular and structural biology of phosphorylated and glycosylated proteins expressed in eukaryotic expression systems which are especially suited for large-scale production of these proteins. In our laboratory, we have observed that eukaryotic expression systems are particularly suited for the expression of thermostable light-activated proteins, e.g., bacteriorhodopsins and plastocyanins. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Peoples R China MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 13 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Review AV - English IS - 1046-5928 UR - ISI:000170371400001 L2 - HAMSTER OVARY CELLS; N-LINKED GLYCOSYLATION; HIGH-LEVEL SECRETION; BETA-GALACTOSIDE ALPHA-2,6-SIALYLTRANSFERASE; TISSUE-PLASMINOGEN ACTIVATOR; RECOMBINANT CHO CELLS; HUMAN-MOUSE HYBRIDOMA; PICHIA-PASTORIS; KINASE-C; SACCHAROMYCES-CEREVISIAE SO - Protein Expression and Purification 2001 ;22(3):369-380 3473 UI - 13081 AU - Licea-Claverie A AU - Salgado-Rodriguez R AU - Arndt KF AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoDresden Univ Technol, Inst Phys Chem & Electrochem, Dresden, Germany TI - Temperature-sensitive N-isopropylacrylamide copolymers with hydrophobic spacers MH - Germany MH - Mexico|Baja California PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824801815 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U308-U308 3474 UI - 13333 AU - Liebowitz LD AU - Ashbee HR AU - Evans EGV AU - Chong Y AU - Mallatova N AU - Zaidi M AU - Gibbs D AD - Giles Sci Inc, Santa Barbara, CA 93140, USAUniv Witwatersrand, Dept Med Microbiol, ZA-2000 Johannesburg, South AfricaS African Inst Med Res, ZA-2000 Johannesburg, South AfricaUniv Leeds, Div Microbiol, Mycol Reference Ctr, Leeds LS2 9JT, W Yorkshire, EnglandYonsei Univ, Coll Med, Severance Hosp, Dept Clin Pathol, Seoul, South KoreaHosp Ceske Budejovice, Dept Med Microbiol, Ceske Budejovice 37087, Czech RepublicHosp Gen OHoran, Dept Invest, Merida 97000, MexicoGibbs, D, Giles Sci Inc, POB 4306, Santa Barbara, CA 93140, USA TI - A two year global evaluation of the susceptibility of Candida species to fluconazole by disk diffusion AB - The in-vitro activity of fluconazole against 46,831 yeast isolates collected over a two-year period from 57 laboratories in 33 countries worldwide was assessed using a disc diffusion method. Candida albicans was the organism isolated most frequently, accounting for 68.6% of the total number of isolates. C, glabrata, C, tropicalis, C parapsilosis and C. krusei and Cryptococcus neoformans represented 9.9, 4.7, 4.3, 1.9, and 1.4% of isolates respectively during the 2 year period and rates varied markedly between countries. In 1999 data blood isolates represented 4.9% of all isolates and intensive care unit isolates represented 9.9%, In both the 1998 and 1999 data, 99% of C, albicans were fully susceptible (S) to fluconazole, and 95.6% of all species of yeasts tested were S or susceptible-dose dependent (S-DD) to fluconazole. No emerging trends of resistance were noted with any of the Candida spp. tested as 96% of all isolates retained susceptibility (S or S-DD) to this agent. (C) 2001 Elsevier Science Inc. All rights reserved MH - Czech Republic MH - United Kingdom MH - Mexico|Yucatan MH - South Africa MH - South Korea MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0732-8893 UR - ISI:000169770100005 L2 - BLOOD-STREAM INFECTIONS; RESISTANCE; ALBICANS; SURVEILLANCE; MORTALITY; FUNGEMIA; MYCOSES; PROGRAM; AIDS SO - Diagnostic Microbiology and Infectious Disease 2001 ;40(1-2):27-33 3475 UI - 13221 AU - Liggett PE AU - Quiroz-Mercado H AU - Alfaro V AU - Mieler W AD - Assoc Evitar Ceguera, Mexico City, DF, MexicoUniv S Carolina, Charleston, SC, USABaylor Univ, Dallas, TX, USACornell Univ, New York Hosp, Hamden, CT, USA TI - Indocyanine green enhanced diode laser for the treatment of choroidal melanoma MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392101174 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S220-S220 3476 UI - 14043 AU - Lim AJ AU - Steffen W AD - Univ Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Guadalajara, Inst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoLim, AJ, Univ Coll London, Dept Phys & Astron, Gower St, London WC1E 6BT, England TI - Jet cocoons in rotating Seyfert galaxies: adaptive three-dimensional hydrodynamics AB - The narrow-line regions of some Seyfert galaxies show evidence for nuclear jets interacting with the rotating interstellar gas; this is shown by point-symmetric emission-line structures in, for example, Mrk 573 and NGC 3393. We study this situation with numerical simulations of a jet in a sidewind of uniform density but linearly increasing velocity as one moves from the source. We use a new three-dimensional hydrodynamic code on a binary adaptive grid. We consider two different models, one with a cocoon expansion speed higher and one with expansion speed lower than the ISM speed. We find that the model with high cocoon expansion speed is similar to results from previous calculations without a sidewind, except for minor asymmetries. However, model B with the slow expansion speed and fast wind speed shows considerable qualitative differences. The jet hits and bounces off the dense cooling envelope, which is dragged by the sidewind into the straight path of the jet. The path of the jet within the cocoon is straight as long as the extended hot cocoon acts as a shield. Once the jet hits the cold envelope of the cocoon it is bent directly by the ram pressure of the ambient medium and follows a parabola of the third degree, which we derive as an analytical approximation for the path. The region where the jet hits the envelope is the start of strong radio emission. This point moves towards the source with age of the jet and its bending angle. We therefore find a possible observable correlation between the distance of the first strong radio knot and the overall bending of jets in Seyfert galaxies. A comparison of our results with observations of Mrk 573 shows that the essential structural and spectral features can be reproduced by choosing an appropriate viewing angle and evolutionary stage. Looking approximately along the original jet direction a structure is found which strongly resembles an ionization cone. Hence caution should prevail when interpreting these sorts of structure within the narrow-line region of Seyfert galaxies MH - United Kingdom MH - Mexico|Jalisco PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000167630100019 L2 - methods : numerical;ISM : clouds;ISM : jets and outflows;galaxies : active;galaxies : individual : Mrk 573;galaxies : Seyfert;NARROW-LINE REGION; SUPERSONIC SIDE WIND; RADIO-SOURCES; MODEL; IRAS-04210+0400; SIMULATIONS; BOWSHOCKS; CLOUDS SO - Monthly Notices of the Royal Astronomical Society 2001 ;322(1):166-176 3477 UI - 12699 AU - Linam DL AU - Singh VP AU - McClure JC AU - Lush GB AU - Mathew X AU - Sebastian PJ AD - Univ Texas, Dept Elect & Comp Engn, El Paso, TX 79968, USAUniv Kentucky, Dept Elect Engn, Lexington, KY 40506, USAUNAM, Ctr Invest Energia, Temixco, Morelos, MexicoMcClure, JC, Univ Texas, Dept Elect & Comp Engn, El Paso, TX 79968, USA TI - Light and voltage dependence of the junction transport properties of CdTe/CdS photovoltaics AB - The J-V curve of CdTe/CdS photovoltaics does not consist of a simple superposition of a loss current and a light generated current with a considerable loss in conversion efficiency. This paper uses capacitance/voltage measurements and J-V measurements at a variety of temperatures and light levels to develop a model for this non-superposition. It was found that a light dependent tunneling mechanism dominates at low voltages. Moreover, the tunneling takes place from a trap level within the CdTe. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000171361800010 L2 - cadmium telluride;CdTe;solar cells;junctions;thin films;photovoltaics;SOLAR-CELLS SO - Solar Energy Materials and Solar Cells 2001 ;70(3):335-344 3478 UI - 12652 AU - Linhart O AU - Gela D AU - Rodina M AU - Gutierrez MR AD - Univ S Bohemia, Res Inst Fish Culture & Hydrobiol, Dept Genet & Breeding, Vodnany 38925, Czech RepublicMetropolitan Univ, Lab Aquaculture & Reprod Biol, Mexico City, DF, MexicoLinhart, O, Univ S Bohemia, Res Inst Fish Culture & Hydrobiol, Dept Genet & Breeding, Vodnany 38925, Czech Republic TI - Short-term storage of ova of common carp and tench in extenders AB - In a study of the effect of short-term storage on the hatching rate of common carp Cyprinus carpio and tench Tinca tinca ova in vitro in various extenders at 21 degreesC under aerobic conditions, the best extender for 30 min storage for common carp appeared to be Dettlaff 1. This gave the same hatching rate, as controls without extender (55% v. 56%). For 60 min storage of ova, the best extenders were Dettlaff 2 (24% hatching rate) and Dettlaff 3 (30%), but hatching was significantly lower than in the control (58%). In carp ovarian artificial fluid (CAF) extender, the hatching rate of common carp ova was also high after 10 min, but decreased to 12% after 30 min. In tench, the hatching rate of ova increased after 10 min storage in Dettlaff 5 extender (44%) compared to the control (41%) without extender. However, it was significantly lower after storage in Dettlaff 1, 2, 3, 4, 5 and CAF extenders for 20, 30 and 60 min, compared to controls. Malformations (10-50%) were observed in the tench second control groups without extender after 10, 20 and 30 min storage of ova. (C) 2001 The Fisheries Society of the British Isles MH - Czech Republic MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-1112 UR - ISI:000171541600013 L2 - carp Cyprinus carpio;tench Tinca tinca;ova;hatching rate;extender;CYPRINUS-CARPIO; EUROPEAN CATFISH; SILURUS-GLANIS; EGGS; CHORION; DILUENT SO - Journal of Fish Biology 2001 ;59(3):616-623 3479 UI - 12231 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryermadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - Chiodini G AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - A new measurement of the Xi(+)(c) lifetime AB - A precise determination of the charm-strange baryon Xi (+)(c) lifetime is presented. The data were accumulated by the Fermilab high-energy photoproduction experiment FOCUS. The measurement is made with 300 Xi (+)(c) --> Xi (-)pi (+)pi (+) decays, 130 Xi (+)(c) --> Sigma (+)K(-)pi (+) decays, 45 Xi (+)(c) --> pK(-)pi (+) decays and 58 Xi (+)(c) --> Lambda (0)K(-)pi (+)pi (+) decays. The Xi (+)(c) lifetime is measured to be 0.439 +/- 0.022 +/- 0.009 ps. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172607200007 L2 - BARYON XI-C+; MASS SO - Physics Letters B 2001 ;523(1-2):53-59 3480 UI - 12578 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferi A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Simao FRA AU - Carrillo S AU - Casimiro E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - Caccianiga B AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala A AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo M AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Viola L AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez I AU - Mirles A AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurement of the branching ratios of D+ and D-s(+) hadronic decays to four-body final states containing a K-S AB - We have studied hadronic four-body decays of D+ and D-s(+) mesons with a Ks in the final state using data recorded during the 1996-1997 fixed-target run of the Fermilab high energy photoproduction experiment FOCUS. We report a new branching ratio measurement of Gamma (D+ --> K(S)K(-)pi (+)pi (+))GammaF(D+ K(S)pi (+) pi (+) pi (-)) = 0.0768 +/- 0.0041 +/- 0.0032. We make the first observation of three new decay modes with branching ratios Gamma (D+ --> KSK+ pi (+) pi (-))/Gamma (D+ --> K(S)pi (+) pi (+) pi (-)) = 0.0562 +/- 0.0039 +/- 0.0040, Gamma (D+ --> KSK+K- pi (+))/Gamma (D+ --> K(S)pi (+) pi (+) pi (-)) 0.0077 +/- 0.0015 +/- 0.0009, and Gamma (D-s(+) --> KSK+ pi (+) pi (-))/Gamma (D-s(+) --> KSK- pi (+) pi (+)) 0.586 +/- 0.052 +/- 0.043, where in each case the first error is statistical and the second error is systematic MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000171637100013 L2 - DS+ SO - Physical Review Letters 2001 ;8716(16):art-162001 3481 UI - 13254 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Simao FRA AU - Carrillo S AU - Casimiro E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - Caccianiga B AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala A AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Viola L AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurement of the relative branching ratio BR(Xi(+)(c) -> p(+)K(-)pi(+))/BR(Xi(+)(c) -> Xi(-)pi(+)pi(+)) AB - We report the observation of the Cabibbo suppressed decay Xi (+)(c) --> pK(-)pi (+) using data collected with the FOCUS spectrometer during the 1996-1997 Fermilab fixed target run. We find a Xi (+)(c) signal peak of 202 +/- 35 events. We have measured the relative branching ratios BR(Xi (+)(c) --> pK(-)pi (+))/BR(Xi (+)(c) --> Xi (-)pi (+)pi (+)) = 0.234 +/- 0.047 +/- 0.022 and BR(Xi (+)(c) --> p (K) over bar*(892)(0))/BR(Xi (+)(c) --> pK(-)pi (+)) = 0.54 +/- 0.09 +/- 0.05. (C) 2001 Published by Elsevier Science B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000169980900005 SO - Physics Letters B 2001 ;512(3-4):277-282 3482 UI - 13976 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferi A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Simao FRA AU - Carrillo S AU - Casimiro E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti C AU - Boschini M AU - Caccianiga B AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro E AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala A AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo M AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Viola L AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring MS AU - Sheldon PD AU - Stenson K AU - Webster MS AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermi Natl Accelerator Lab, Batavia, IL 60510, USALab Nazl Frascati, I-00044 Frascati, ItalyIst Nazl Fis Nucl, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Nucl & Teor, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Study of the decay D-0 -> K+pi(-) AB - Using a large sample of photoproduced charm mesons from the FOCUS experiment at Fermilab (FNAL-E831), we observe the decay D-0 --> K+ pi (-) with a signal yield of 149 +/- 31 events compared to a similarly cut sample consisting of 36760 +/- 195 D-0 --> K- pi (+) events. We use the observed ratio of D-0 --> K+ pi (-) to D-0 --> K- pi (+) (0.404 +/- 0.085 +/- 0.025)% to obtain a relationship between the D-0 mixing and doubly Cabibbo suppressed decay parameters MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000167866300011 L2 - CABIBBO-SUPPRESSED DECAYS; SEARCH SO - Physical Review Letters 2001 ;86(14):2955-2958 3483 UI - 13098 AU - Lira-Ruan V AU - Sarath G AU - Klucas RV AU - rredondo-Peter R AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoUniv Nebraska, George W Beadle Ctr, Dept Biochem, Lincoln, NE 68588, USAArredondo-Peter, R, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apartado 565-A, Cuernavaca 62210, Morelos, Mexico TI - Synthesis of hemoglobins in rice (Oryza sativa var. Jackson) plants growing in normal and stress conditions AB - In rice (Oryza sativa var. Jackson) at least three copies of hemoglobin (hb) gene exist. Rice hb1 and hb2 genes are differentially expressed in roots and leaves from mature plants. We used polyclonal antibodies raised to recombinant rice Hb1 and Western blotting to analyze the synthesis of I-Ibs in rice plants growing under normal or stress conditions. Results showed that rice Hbs are synthesized in coleoptiles, seminal roots and embryos from seeds germinated for 6 days, and also in leaves and roots from plants 2-14 weeks after germination. Analysis of Hb synthesis in stressed rice showed that: (i) level of Hbs was higher in etiolated than control plants. (ii) level of I-Ibs increased in roots from flooded rice, and (iii) level of Hbs did not change under oxidative (H2O2), nitrosative (SNP) and hormonal (2,4-D) stresses. These results suggest that the effect of light withdrawal in etiolated leaves and O-2-limiting conditions in flooded roots, but not oxidative, nitrosative and hormonal stresses. modulate the synthesis of rice Hbs. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0168-9452 UR - ISI:000170414600009 L2 - function;hemoglobin;non-symbiotic;Oryza;stress;synthesis;RECOMBINANT PROTEIN; ESCHERICHIA-COLI; GENE; LEGHEMOGLOBIN; PURIFICATION; EXPRESSION; RESPIRATION; KINETICS; CLONING; NODULES SO - Plant Science 2001 ;161(2):279-287 3484 UI - 12087 AU - Lira A AU - Caldino U AU - Ramirez MO AU - Sanz-Garcia JA AU - Bausa LE AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainLira, A, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico TI - Site-selective spectroscopy of Er3+ ions in the Bi12SiO20 piezoelectric crystal AB - Site-selective spectroscopy fluorescence experiments (emission and excitation) in the near-infrared region associated with the I-4(15/2) <----> I-4(11/2) transitions of Er3+ ions have been successfully used to show the presence of two different Er3+ centres in the Bi12SiO20 piezoelectric crystal. Green (545-570 nm), red (650-690 nm) and near-infrared (850-890 nm) up-converted emissions have been observed and resolved for each type of Centre under excitation up to the I-4(11/2) state. The Stark energy level schemes of the three lower energy states of Er3+ ions have been determined and compared for both centres, showing two quite different crystalline field environments. The mechanisms responsible for the up-conversion process (excited state absorption and/or energy transfer up-conversion) are also analysed MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000172943600036 L2 - UP-CONVERSION; STIMULATED-EMISSION; ENERGY-TRANSFER; ABSORPTION; LASER SO - Journal of Physics-Condensed Matter 2001 ;13(48):11067-11076 3485 UI - 12616 AU - Lirman D AU - Glynn PW AU - Baker AC AU - Morales GEL AD - Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Ctr Marine & Environm Analyses, Miami, FL 33149, USAUniv Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149, USAWildlife Conservat Soc, New York Aquarium, Brooklyn, NY 11224, USAUniv Del Mar, Puerto Angel 70902, Oaxaca, MexicoLirman, D, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Ctr Marine & Environm Analyses, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Combined effects of three sequential storms on the Huatulco coral reef tract, Mexico AB - Reefs of the Huatulco area, southern Mexico, were exposed to an unprecedented sequence of three major storms (Olaf, Pauline, and Rick) over a 2-mo period (September-November 1997). The prior establishment of monitoring transects, as well as the timing of our surveys just I mo after the passage of Hurricane Rick, provided an unique opportunity to document storm impacts on these recently described reef communities of the eastern Pacific. Considering the lack of prior hurricane damage to these reefs, the dominance of branching pocilloporid corals, and the intensity and high frequency of the 1997 storms that affected the area, it was hypothesized that storm-generated damage patterns would be significant and consistent among the reefs of Huatulco. However, the damage patterns documented were limited in severity and variable in spatial distribution. Of the six reefs surveyed prior to the first storm in July-August 1997, only three showed significant decreases in live coral cover, whereas the remaining reefs showed slight, non-significant increases in coral cover between surveys. The most common type of damage observed was the fragmentation of Pocillopora spp. colonies; at some locations, the density of surviving Pocillopora spp. fragments exceeded 20 m(-2). Fragmentation of the massive coral Pavona gigantea (Verrill) was observed only at a single site. At several sites, large sections of reef framework (up to 245 cm in diameter) still exhibiting live Pocillopora spp. colonies on their upper surfaces were detached and transported away from their original locations. Even if the immediate damage observed was significantly less than predicted in light of the physical characteristics of the storms, the long-term effects of these storms will depend on the survivorship of detached colonies and fragments, the regeneration of damaged colonies, and the future impacts of bioerosion MH - Mexico|Oaxaca MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 8 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000171653300017 L2 - INTERMEDIATE DISTURBANCE HYPOTHESIS; STATES VIRGIN-ISLANDS; EL-NINO; EASTERN PACIFIC; COMMUNITY STRUCTURE; ACROPORA-PULCHRA; HURRICANES; IMPACT; GROWTH; FRAGMENTATION SO - Bulletin of Marine Science 2001 ;69(1):267-278 3486 UI - 12698 AU - Liu HB AU - Ascencio JA AU - Perez-Alvarez M AU - Yacaman MJ AD - Univ Texas, Dept Chem Engn, Ctr Nano & Mol Technol, Austin, TX 78712, USATexas Mat Inst, Ctr Nano & Mol Technol, Austin, TX 78712, USAInst Nacl Invest Nucl, Ocoyoacac 52045, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoYacaman, MJ, Univ Texas, Dept Chem Engn, Ctr Nano & Mol Technol, Austin, TX 78712 USA TI - Melting behavior of nanometer sized gold isomers AB - In the present work, the melting behavior of nanometer sized gold isomers was studied using a tight-binding potential with a second momentum approximation. The cases of cuboctahedra, icosahedra, Bagley decahedra, Marks decahedra and star-like decahedra were considered. We calculated the temperature dependence of the total energy and volume during melting and the melting point for different types and sizes of clusters. In addition, the structural evolutions of the nanosized clusters during the melting transition were monitored and revealed. It is found that the melting process has three characteristic time periods for the intermediate nanosized clusters. The whole process includes surface disordering and reordering, followed by surface melting and a final rapid overall melting. This is a new observation, which it is in contrast with previous reports where surface melting is the dominant step. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000171389900012 L2 - gold;surface melting;computer simulations;clusters;ELECTRON-MICROSCOPE; SMALL PARTICLES; TRANSITION; CLUSTERS; NANOCLUSTERS; COALESCENCE; POTENTIALS; MOLECULES; METALS; ALLOYS SO - Surface Science 2001 ;491(1-2):88-98 3487 UI - 12452 AU - Llach F AU - Forero FV AD - Georgetown Univ, Med Ctr, Renal Dept, Washington, DC, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoLlach, F, 3800 Resevoir Rd NW,PHC-F600, Washington, DC 20007, USA TI - Secondary hyperparathyroidism in chronic renal failure: Pathogenic and clinical aspects AB - Secondary hyperparathyroidism occurs early in the course of chronic renal failure. Early in the course, a deficit of calcitriol and an abnormality in the calcium sensor receptor may be the important factors; later, with advanced renal failure, hyperphosphatemia becomes an additional important pathogenic factor. Important clinical problems in dialysis patients are as follows: (1) hyperphosphatemia, which contributes to high morbidity and mortality of dialysis patients (a clinical approach to maintaining a normal serum phosphorus is essential and is discussed in this review); (2) a high calcium X phosphorus product leading to coronary artery calcifications (factors leading to calcifications are also discussed); and (3) calciphylaxis, which has been observed with increasing frequency in these patients (an increase in the total calcium load may be the most important pathogenic factor leading to this syndrome). Therapeutic considerations regarding the use of new vitamin D analogues devoid of a hypercalcemic and/or a hyperphosphatemic effect are also mentioned. (C) 2001 by the National Kidney Foundation, Inc MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 25 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0272-6386 UR - ISI:000171973000003 L2 - secondary hyperparathyroidism;chronic renal failure (CRF);vitamin D;PARATHYROID-HORMONE SECRETION; EXTRACELLULAR CA2+-SENSING RECEPTOR; MESSENGER-RIBONUCLEIC-ACID; VITAMIN-D; HEMODIALYSIS-PATIENTS; CALCIUM-RECEPTOR; PHOSPHORUS RESTRICTION; UREMIC RATS; IN-VITRO; PREPROPARATHYROID HORMONE SO - American Journal of Kidney Diseases 2001 ;38(5):S20-S33 3488 UI - 12758 AU - Logerwell EA AU - Lavaniegos B AU - Smith PE AD - Univ Washington, Sch Aquat & Fishery Sci, Seattle, WA 98195, USAUniv Calif San Diego, Scripps Inst Oceanog, Marine Life Res Grp, La Jolla, CA 92093, USACtr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada 22800, Baja California, MexicoSW Fisheries Sci Ctr, La Jolla, CA 92038, USALogerwell, EA, Alaska Fisheries Sci Ctr, F-AKC3,POB 15700, Seattle, WA 98115 USA TI - Spatially-explicit bioenergetics of Pacific sardine in the Southern California Bight: are mesoscale eddies areas of exceptional prerecruit production? AB - Previous research shows that offshore mesoscale eddies in the Southern California Bight region are areas where sardine larval abundance is significantly increased relative to inshore, slope and surrounding offshore waters. In order for mesoscale eddies to be a mechanism linking climate and sardine population variability they must be areas of exceptional prerecruit production. Temperature and prey data from various Southern California Bight (SCB) habitats, including offshore eddies, were applied to a spatially-explicit bioenergetic model which predicts sardine prerecruit growth potential. Growth potential was similar in inshore, slope, and eddy regions (11% and 12% day(-1)), and was lower in the offshore region, 9% day(-1). To estimate production in eddy and non-eddy habitats, growth potential was multiplied by habitat-specific estimates of sardine larval biomass from at-sea surveys. A production index, a measure of potential production resulting from individual growth rate potential and local abundance, was greater in the model cyclonic eddy than in all other regions by more than an order of magnitude. In fact, the production index in the eddy was four times greater than in all other regions combined. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Oceanography U5 - J;Article AV - English IS - 0079-6611 UR - ISI:000171261600021 L2 - CURRENT SYSTEM; ENGRAULIS-MORDAX; SHELIKOF-STRAIT; OFFSHORE EDDY; THERAGRA-CHALCOGRAMMA; NORTHERN ANCHOVY; GROWTH; LARVAE; VARIABILITY; ALASKA SO - Progress in Oceanography 2001 ;49(1-4):391-406 3489 UI - 13534 AU - Loinard L AU - Castets A AU - Ceccarelli C AU - Caux E AU - Tielens AGGM AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoObserv Univ Bordeaux 1, F-33270 Florac, FranceUniv Toulouse 3, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, FranceUniv Groningen, Space Res Org Netherlands, NL-9700 AV Groningen, NetherlandsLoinard, L, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 72-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Doubly deuterated molecular species in protostellar environments AB - We report the detection of the doubly deuterated forms of ammonia (ND2H) and formaldehyde (D2CO) toward 16293B, a newly identified low-luminosity protostar in the rho Ophiucus molecular complex. The abundances of ND2H and D2CO compared with their hydrogenated counterparts NH3 and H2CO are similar to3% and 40% +/- 20%, respectively. To date, 16293B is thus the source with the highest levels of multiple deuteration: [ND2H]/[NH3] is 5-6 times larger there than in the only other astronomical source where ND2H has ever been found, the dense ammonia core of L134N; and [D2CO]/[H2CO] is more than 5 times higher than in the proto-binary system IRAS 16293-2422. The relative abundances of doubly deuterated molecules in low-luminosity protostars are much higher than their current gas-phase [D]/[H] ratios would suggest and, therefore, likely reflect active grain surface chemistry followed by some desorption process MH - France MH - Mexico|Michoacan MH - Netherlands PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000169133800019 L2 - ISM : abundances;ISM : individual (IRAS 16293E);ISM : molecules;stars : formation;DENSE INTERSTELLAR CLOUDS; DEUTERIUM FRACTIONATION; SURFACE-CHEMISTRY; IRAS 16293-2422; IRAS-16293-2422; FORMALDEHYDE; ABUNDANCES; D2CO SO - Astrophysical Journal 2001 ;552(2):L163-L166 3490 UI - 10870 AU - Lopez-Bolanos R AU - Cocoletzi GH AU - Ulloa SE AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USALopez-Bolanos, R, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Electronic states and tunneling times in coupled self-assembled quantum dots AB - Electron energy levels in single dots, and energy splitting and tunneling times in stacked quantum dots are calculated as functions of structure parameters. An effective mass approach is used to solve the Schrodinger equation for cylindrical dots with finite confinement potentials. Strong confinement due to small sizes produces quantized energy levels in single dots and strong interactions of the wavefunctions with adjacent dots. This electronic coupling induces significant energy splittings and short tunneling times for characteristic structures used in experiments. This coupling may even yield coherent artificial molecular states with different optical properties. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Puebla MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0749-6036 UR - ISI:000176380800007 L2 - tunneling time;quantum dot;InAs;CONFINEMENT; LENS SO - Superlattices and Microstructures 2001 ;30(5):279-285 3491 UI - 12705 AU - Lopez-Briones S AU - Soloski MJ AU - Bojalil R AU - Fragoso G AU - Sciutto E AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoJohns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205, USAInst Nacl Cardiol Ignacio Chavez, Mexico City 14080, DF, MexicoSciutto, E, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Apartado Postal 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - CD4(+) TCR alpha beta T cells are critically involved in the control of experimental murine cysticercosis in C57BL/6J mice AB - Taenia crassiceps cysticerci develop in the peritoneal cavity of BALB/cAnN mice and, to a lesser extent, in C57BL/6J mice. The mechanisms involved in the immunity to this murine cysticercosis seem to be mainly mediated by T cells. To gain further insight into the mechanisms of cysticercal immunity, the susceptibility of mice deficient in different immunologically relevant genes was compared with that of the respective wild type. Mice were classified according to the parasite load and survival after infection: highly susceptible (HS), with an increased parasite load and mortality rate (CD4(-/-), TCR alpha (-/-), TCR beta (-/-), RAG1(-/-)) susceptible, with only increased parasite load (TCR delta (-/-), BALB/cAnN), and relatively resistant, with a lower number of parasites (CD8(-/-), WT). Neither specific proliferative response nor Th2 cytokine or antibody responses were observed in HS mice. These data strongly suggest that CD4(+)TCR alpha beta (+) T cells have a critical role in the control of T. crassiceps murine cysticercosis MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000171331100005 L2 - TAENIA-CRASSICEPS CYSTICERCOSIS; IMMUNE-RESPONSE; IN-VITRO; SUSCEPTIBILITY; RESISTANCE; INFECTION; CYTOKINES; SOLIUM; HOST SO - Parasitology Research 2001 ;87(10):826-832 3492 UI - 12044 AU - Lopez-Carrillo L AU - Torres-Sanchez L AU - Moline J AU - Ireland K AU - Wolff MS AD - Natl Inst Publ Hlth, Natl Ctr Environm Hlth Sci, Cuernavaca 62508, Morelos, MexicoNatl Polytech Inst, Ctr Res & Adv Studies, Mexico City, DF, MexicoNatl Inst Publ Hlth, Ctr Hlth Syst Res, Cuernavaca, Morelos, MexicoMt Sinai Sch Med, Div Environm Hlth Sci, New York, NY, USALopez-Carrillo, L, Natl Inst Publ Hlth, Natl Ctr Environm Hlth Sci, Av Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Breast-feeding and serum p,p ' DDT levels among Mexican women of childbearing age: A pilot study AB - For almost 50 years, millions of Mexicans have been directly and/or indirectly exposed to (1,1,1-trichloro-2,2-bis [p-chlorophenyl] ethane) (p,p'DDT). The potential related health outcomes of this exposure are of international concern. The objective of the study was to determine the effect of breast-feeding on serum levels of 1,1-dichloro-2; 2'-bis (p-chlorophenyl)ethylene (pp/DDE) and pp'DDT in women of childbearing age who were residents of the state of Morelos, Mexico. In March 1999, we examined a sample of 24 women, ages 21 to 36 years, who came with their children to the outpatient facility of a county Health Center in the state of Morelos. The geometric mean for p,p'DDE was 21.8 ng/ml+/-2.58 (GSD) and 2.9 ng/ml+/-2.84 for p,p'DDT. For each month of breast-feeding we observed similar significant decreases for both p,p'DDE (beta=-0.0403 per log concentration unit, P=0.001) and p,p'DDT (beta=-0.0309, P=0.03) serum levels, adjusted by mothers' age and number of children. The adjusted half-life estimate for p,p'DDE serum levels was 17 months. It was concluded that breast-feeding leads to rapid removal of p,p'DDT from the body (<2 year half-life) compared to nonlactational elimination rates (<5 year half-life). In this population, serum p,p'DDE levels were similar to those found 20 years ago in the United States. (C) 2001 Elsevier Science MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 22 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000173084700002 L2 - p,p ' DDE;p,p ' DDT;breast-feeding;women;childbearing age;blood serum;Mexico;POLYCHLORINATED-BIPHENYLS; CANCER; RESIDUES; RISK; MILK; CRYPTORCHIDISM; HYDROCARBONS; HYPOSPADIAS; METABOLITES; DDE SO - Environmental Research 2001 ;87(3):131-135 3493 UI - 13251 AU - Lopez-de-Alba PL AU - Lopez-Martinez L AU - Cerda V AU - Rodriguez LMDL AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, MexicoUniv Illes Balears, Dept Quim, E-07071 Palma de Mallorca, SpainLopez-de-Alba, PL, Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, Mexico TI - Simultaneous determination of tartrazine, sunset yellow and allura red in commercial soft drinks by multivariate spectral analysis AB - The spectral resolution of ternary mixtures of the dyes, allura red (red-40), sunset yellow (yellow-6) and tartrazine (yellow-5) was achieved by partial least squares (PLS-I and PLS-2) and principal component regression (PCR) multivariate calibration. The absorption and first-derivative absorption spectra of ternary synthetic standard mixtures were used to perform the optimization of the calibration matrices by PLS and PCR methods. The effect of the spectral region used during the calibration was studied and showed to have an important effect on the number of factors used to model the studied analytes. Method performance in the concentration predictability of different synthetic standard samples by the application of the various chemometric approaches are discussed and compared by ANOVA. The proposed methods were applied satisfactorily to the determination of allura red, sunset yellow and tartrazine in several commercial softdrinks and the results were compared to a HPLC standard method developed in this laboratory. While no difference was observed when analyzing synthetic mixtures of the dyes, the use of derivative spectra together with multivariate calibration gives results comparable to HPLC when analyzing beverage samples. For the first time a robust analysis method in which sample preparation is minimal when dealing with samples with high matrix interference is developed. The present work shows areal practical application of derivative spectra in multivariate calibration MH - Mexico|Guanajuato MH - Spain PB - BARCELONA: ELSEVIER INFORMACION PROFESSIONAL, S A RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0212-0569 UR - ISI:000169959000001 L2 - spectrophotometry;multivariate calibration analysis;dyes;red-40;yellow-6;yellow-5;PARTIAL LEAST-SQUARES; SIMULTANEOUS SPECTROPHOTOMETRIC DETERMINATION; ION-PAIR FORMATION; DERIVATIVE SPECTROPHOTOMETRY; BIVARIATE CALIBRATION; 2-THIOBARBITURIC ACID; BINARY-MIXTURES; CARMINIC ACID; MALONALDEHYDE; EXTRACTION SO - Quimica Analitica 2001 ;20(2):63-72 3494 UI - 13015 AU - Lopez-Gonzalez C AU - Presley SJ AD - Inst Politecn Nacl, Comis Fomento Act Acad, Ctr Interdisciplinario Invest Desarrollo Integral, Unidad Durango, Durango 34220, MexicoTexas Tech Univ, Dept Biol Sci, Program Ecol, Lubbock, TX 79409, USATexas Tech Univ Museum, Lubbock, TX 79409, USALopez-Gonzalez, C, Inst Politecn Nacl, Comis Fomento Act Acad, Ctr Interdisciplinario Invest Desarrollo Integral, Unidad Durango, Sigma S-N Fracc 20 Noviembre 2, Durango 34220, Mexico TI - Taxonomic status of Molossus bondae J. A. Allen, 1904 (Chiroptera : Molossidae), with description of a new subspecies AB - We document the known distribution of Molossus bondae as far south as northern Argentina. Argentine specimens include the type series of M. obscurus currentium Thomas, 1901, a name with priority over M. bondae. Analysis of morphometric variation across the species' geographic range revealed the presence of 3 distinct populations of M. bondae. We reassessed taxonomic and nomenclatural status of populations previously included under the name M. bondae and concluded that the valid name for this taxon is Molossus currentium Thomas. Based on 12 cranial and 2 external characters we recognize 3 subspecies for this species, 1 of which we formally describe as new MH - Mexico|Durango MH - USA PB - PROVO: AMER SOC MAMMALOGISTS RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000170597600013 L2 - Chiroptera;geographic variation;Molossidae;Molossus bondae;Molossus currentium;sexual dimorphism;South America SO - Journal of Mammalogy 2001 ;82(3):760-774 3495 UI - 13231 AU - Lopez-Gonzalez I AU - de la Vega-Beltran J AU - Santi CM AU - Florman HM AU - Felix R AU - Darszon A AD - UNAM, Inst Biotechnol, Dept Genet & Mol Physiol, Cuernavaca 62100, Morelos, MexicoUNAM, Inst Cell Physiol, Dept Biophys, Cuernavaca 62100, Morelos, MexicoUniv Massachusetts, Sch Med, Dept Cell Biol, Worcester, MA 01655, USAIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07738, DF, MexicoDarszon, A, UNAM, Inst Biotechnol, Dept Genet & Mol Physiol, Ave Univ 2001,Col Chamilpa, Cuernavaca 62100, Morelos, Mexico TI - Calmodulin antagonists inhibit T-type Ca2+ currents in mouse spermatogenic cells and the zona pellucida-induced sperm acrosome reaction AB - The sperm acrosome reaction (AR) is a regulated exocytotic process required for gamete fusion. it depends on an increase in [Ca2+](i) mediated by Ca2+ channels. Although calmodulin (CaM) has been reported to regulate several events during the AR, it is not known whether it modulates sperm Ca2+ channels. in the present study we analyzed the effects of Cam antagonists W7 and trifluoroperazine on voltage-dependent T-type Ca2+ currents in mouse spermatogenic cells and on the zona pellucida-induced AR in sperm. We found that these CaM antagonists decreased T-currents in a concentration-dependent manner with IC50 values of similar to 10 and similar to 12 muM, respectively. W7 altered the channels' voltage dependence of activation and slowed both activation and inactivation kinetics. It also induced inactivation at voltages at which T-channels are not activated, suggesting a promotion of inactivation from the closed state. Consistent with this, W7 inhibited the ZP-induced [Ca2+](i) transients in capacitated sperm. Likewise, W7 and TFP inhibited the AR with an IC50 of similar to 10 muM. In contrast, inhibitors of CaM-dependent kinase II and protein kinase A, as well as a CaM-activated phosphatase, had no effect either on T-currents in spermatogenic cells or on the sperm AR. Together these results suggest a functional interaction between CaM and the sperm T-type Ca2+ channel. They are also consistent with the involvement of T-channels in the AR. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 21 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000170109200018 L2 - Ca2+ channel regulation;T-type Ca2+ channel;spermatogenic cells;sperm;CaM;W7;TFP;acrosome reaction;PROTEIN-TYROSINE PHOSPHORYLATION; CALCIUM CHANNELS; MAMMALIAN SPERM; PLASMA-MEMBRANE; FERTILIZATION; INACTIVATION; CAPACITATION; LOCALIZATION; ACTIVATION; EXPRESSION SO - Developmental Biology 2001 ;236(1):210-219 3496 UI - 14266 AU - Lopez-Lara IM AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62251, Morelos, MexicoTech Univ Berlin, Inst Biotechnol, D-13353 Berlin, GermanyLopez-Lara, IM, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apdo Postal 565-A, Cuernavaca 62251, Morelos, Mexico TI - The nodulation protein NodG shows the enzymatic activity of an 3-oxoacyl-acyl carrier protein reductase AB - The acyl carrier protein NodF is required for the synthesis of unusual polyunsaturated fatty acids that confer specificity to lipochitin oligosaccharide nodulation (Nod) factors of Rhizobium leguminosarum. In this study, homogeneous NodF protein was used as a ligand to identify proteins of R. leguminosarum that specifically interact with NodF and presumably are involved in the biosynthesis or transfer of the unusual fatty acids. The N-terminal amino acid sequence of a 29-kDa protein that interacts strongly with NodF revealed high similarity to NodG of Rhizobium sp. N33 and to NodG of Sinorhizobium meliloti. We cloned and sequenced the gene coding for the NodG-like protein of R. leguminosarum and found it to be the product of the constitutively expressed gene fabG. FabG is the 3-oxoacyl-acyl carrier protein reductase that catalyzes the first reduction step in each cycle of fatty acid elongation. FabG of R, leguminosarum and NodG of Rhizobium sp, N33 were expressed in Escherichia coli, In both cases, the purified protein showed 3-oxoacyl-acyl carrier protein reductase activity in vitro. Therefore, NodG has the same biochemical function as FabG, and the high degree of similarity at the protein and DNA level suggest that nodG is a duplication of the housekeeping gene fabG MH - Germany MH - Mexico|Morelos PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000167079200009 L2 - fatty acid biosynthesis;gene duplication;LIPO-OLIGOSACCHARIDE SIGNALS; RHIZOBIUM-MELILOTI; HOST SPECIFICITY; ESCHERICHIA-COLI; NUCLEOTIDE-SEQUENCE; SULFATE ACTIVATION; MOLECULAR-BASIS; GENES; LEGUMINOSARUM; CLONING SO - Molecular Plant-Microbe Interactions 2001 ;14(3):349-357 3497 UI - 13289 AU - Lopez-Martin L AU - Raga AC AU - Lopez JA AU - Meaburn J AD - UNAM, Inst Astron, Mexico City 04510, DF, MexicoUNAM, Inst Astron, Ensenada 22860, Baja California, MexicoUniv Manchester, Dept Astron, Macclesfield SK11 9DL, Cheshire, EnglandLopez-Martin, L, UNAM, Inst Astron, Circuito Invest Cientifica, Mexico City 04510, DF, Mexico TI - The structure and kinematics of the HH 444 photoionized jet in the sigma Orionis region AB - HH 444 is a stellar jet which is immersed in the H II region photoionized by sigma Orionis. Spatially resolved, high spectral resolution observations of the H alpha and [N II] lambda lambda 6548, 6584 lines have been obtained for this object. These observations reveal for the first time the detailed velocity structure of the stellar jet and its associated bow-shock. The line profiles are modeled with gasdynamic numerical simulations, using a 3D code that also includes the transfer of the ionizing radiation from an external source (i.e., sigma Orionis for the case of HH 444). In order to reproduce the observed characteristics of the line profiles, we find that an axially peaked initial velocity profile for the jet and a non-zero initial opening angle for the ow with a time-variable ejection velocity is required. With these three ingredients we can reproduce the observed "acceleration" of the material along the jet beam, the rapid H alpha intensity drop for increasing distances from the source, and the knotty structure of the jet, respectively MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000169943500033 L2 - ISM : jets and outflows hydrodynamics;shock waves;ISM : individual : HH 444;NEBULA SO - Astronomy & Astrophysics 2001 ;371(3):1118-1122 3498 UI - 14331 AU - Lopez-Martin L AU - Raga AC AU - Mellema G AU - Henney WJ AU - Canto J AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoStockholm Univ, Dept Astron & Observ, S-13336 Saltsjobaden, SwedenUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, MexicoLopez-Martin, L, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264,Cd Univ, Mexico City 04510, DF, Mexico TI - Photoevaporating flows from the cometary knots in the Helix Nebula (NGC 7293) AB - We explain the Ha emission of the cometary knots in the Helix Nebula (NGC 7293) with an analytical model that describes the emission of the head of the globules as a photoevaporated flow produced by the incident ionizing radiation of the central star. We compare these models with the H alpha emission obtained from the Hubble Space Telescope (HST) archival images of the Helix Nebula. From a comparison of the Ha emission with the predictions of the analytical model we obtain a rate of ionizing photons from the central star of about 5 x 10(45) s(-1), which is consistent with estimates based on the total H beta flux of the nebula. We also model the tails of the cometary knots as a photoevaporated wind from a neutral shadow region produced by the diffuse ionizing photon field of the nebula. A comparison with the HST images allows us to obtain a direct determination of the value of the diffuse ionizing flux. We compare the ratio of diffuse to direct stellar flux as a function of radius inside an H II region with those obtained from the observational data through the analytical tail and head wind model. The agreement of this model with the values determined from the observations of the knots is excellent MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166939900026 L2 - ISM : structure;planetary nebulae : individual (NGC 7293);stars : AGB and post-AGB;PLANETARY-NEBULAE; ORION NEBULA; DISTANCES; PROPLYDS; NGC-7293; CLUMPS; STARS; DISK SO - Astrophysical Journal 2001 ;548(1):288-295 3499 UI - 12348 AU - Lopez-Martinez L AU - Lopez-de-Alba PL AU - Cerda-Martin V AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, MexicoUniv Illes Balears, Dept Quim, AEST, E-07071 Palma de Mallorca, SpainLopez-de-Alba, PL, Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, Mexico TI - Bivariate calibration as an alternative for zero-crossing technique in the resolution of binary mixtures by derivative spectrophotometry AB - In this work, the bivariate calibration algorithm is proposed as an alternative for the resolution of binary mixtures using derivative spectrophotometry. This algorithm involves the use of four calibration curves: two for each compound at two different wavelengths, selected by Kaiser's method. Four binary mixtures were studied (tartrazine-allura red; sunset yellow-erythrosine B; tartrazine-riboflavine and acetylsalycilic acid-caffeine) as representative examples where their resolution with the conventional zero-crossing technique is not suitable and, in each case, rather good analytical results were obtained using, the bivariate method MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2719 UR - ISI:000172315500014 L2 - derivative spectrophotometry;bivariate calibration;zero-crossing technique;INTERNAL STANDARD; ION-PAIR; SPECTROSCOPY; FORMULATIONS; SAMPLES; SYSTEM SO - Analytical Letters 2001 ;34(14):2563-2583 3500 UI - 13681 AU - Lopez-Merino A AU - Monnet DL AU - Hernandez I AU - Sanchez NL AU - Boeufgras JM AU - Sandoval H AU - Freney J AD - Fac Pharm, Dept Microbiol Med & Mol, Bacteriol Lab, F-69373 Lyon 08, FranceIPN, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 07738, DF, MexicoStatens Serum Inst, DK-2300 Copenhagen S, DenmarkInst Nacl Diagnost & Referencia Epidemiol, Lab Brucelosis, Mexico City, DF, MexicoUniv Autonoma Metropolitana, Dept Sistemas Biol, Unidad Xochimilco, Mexico City, DF, MexicoAPI, Unite Bacteriol BioMerieux, F-38390 Montalieu Vercieu, FranceFreney, J, Fac Pharm, Dept Microbiol Med & Mol, Bacteriol Lab, DM3,EA 1655, F-69373 Lyon 08, France TI - Identification of Brucella abortus, B. canis, B. melitensis, and B. suis by carbon substrate assimilation tests AB - By using the results of seven carbon substrate assimilation tests from the Biotype 100 system (bioMerieux, Marcy-l'Etoile, France), we correctly identified 79 (85.9%) of 92 Brucella strains tested. The specificity of the method varied from 97.4 to 100% depending on the species. Although a biological safety cabinet must be used, this method represents an easy and fast alternative for the identification of Brucella species. (C) 2001 Elsevier Science B.V. All rights reserved MH - Denmark MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Microbiology;Veterinary Sciences U5 - J;Article AV - English IS - 0378-1135 UR - ISI:000168695200006 L2 - Brucella;carbon substrate;assimilation;diagnosis-bacteria;STRAINS; DIFFERENTIATION; GENUS; LOCUS; PCR SO - Veterinary Microbiology 2001 ;80(4):359-363 3501 UI - 12658 AU - Lopez-Morales V AU - Plestan F AU - Glumineau A AD - Univ Nantes, CNRS, Ecole Cent Nantes, Inst Rech Commun & Cybernet Nantes, F-44321 Nantes 3, FranceIPN, Ctr Invest Computac, Mexico City 07738, DF, MexicoPlestan, F, Univ Nantes, CNRS, Ecole Cent Nantes, Inst Rech Commun & Cybernet Nantes, 1 Rue Noe,BP 92101, F-44321 Nantes 3, France TI - An algorithm for the structural analysis of state space: synthesis of nonlinear observers AB - The problem addressed is the linearization of multi-input multi-output (MIMO) nonlinear systems by. a generalized state coordinates transformation and generalized input-output injection, in order to design an observer. This observer will have linear error dynamics. The goal is to bring together two observers design approaches: a structural one and a numerical one. Necessary and sufficient conditions for the existence of a Linearizing generalized state transformation are obtained by an algebraic way and without computing the input-output differential equations. The main result tests integrability conditions of differential one-forms derived from the state space representation and is applicable to a large subclass of nonlinear systems. Copyright (C) 2001 John Wiley & Sons, Ltd MH - France MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000171522200003 L2 - linearization;generalized input-output injection;nonlinear observers;exterior differentiation;INPUT-OUTPUT INJECTION; LINEARIZATION; SYSTEMS; DYNAMICS; FEEDBACK SO - International Journal of Robust and Nonlinear Control 2001 ;11(12):1145-1160 3502 UI - 13005 AU - Lopez-Ramirez S AU - Barreto JD AU - Palafox-Ramos J AU - Morales RD AU - Zacharias D AD - Inst Politecn Nacl, ESIQIE, Dept Met & Mat Engn, Mexico City 07300, DF, MexicoInst Tecnol Morelia, Mat Grad Ctr, Morelia, Michoacan, MexicoFOESCO Inc, Cleveland, OH 44142, USALopez-Ramirez, S, Inst Politecn Nacl, ESIQIE, Dept Met & Mat Engn, Mexico City 07300, DF, Mexico TI - Modeling study of the influence of turbulence inhibitors on the molten steel flow, tracer dispersion, and inclusion trajectories in tundishes AB - In order to optimize steel flow and maximize the contact time of the inclusions with the slag layer inside the tundish, a proper flow-control arrangement must be designed, considering the shape, the dimensions of the prototype, and the plant operating conditions of the tundish. Physical and mathematical modeling has been used in this study, in a complementary fashion, to evaluate the influence of turbulence-inhibiting devices on the velocity fields, tracer dispersion, small- and large-particle trajectories, flow-pattern characteristics, and grade changes in a large-volume tundish. From the water model and mathematical simulation results, a flow-control system with the best performance was identified; this system must contribute to improving the productivity and cleanliness of the continuous-cast steel MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000170622100005 L2 - CONTINUOUS-CASTING TUNDISHES; HEAT-TRANSFER; LIQUID STEEL; FLUID-FLOW; MELT FLOW SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2001 ;32(4):615-627 3503 UI - 13631 AU - Lopez-Rivera SA AU - Mora AJ AU - Najarro DA AU - Rivera AV AU - Godoy RA AD - Univ Los Andes, Fac Ciencias, Dept Fis, Lab Fis Aplicada, Merida 5101, VenezuelaUniv Los Andes, Fac Ciencias, Dept Quim, Lab Cristalog, Merida 5101, VenezuelaIFUNAM, Mexico City 01000, DF, MexicoLopez-Rivera, SA, Univ Los Andes, Fac Ciencias, Dept Fis, Lab Fis Aplicada, Merida 5101, Venezuela TI - Determination of the structure of IIIa-ZnIn2S4 using convergent-beam electron diffraction and single-crystal x-ray diffraction AB - The crystal structure of the ternary semiconductor IIIa-ZnIn2S4 was investigated using convergent-beam electron diffraction (CBED) and single-crystal x-ray diffraction to elucidate whether the structure is fully ordered, as described by the acentric R3m space group, or has some degree of disorder as described by the centric R (3) over barm space group. The CBED technique, based upon dynamical diffraction, permitted the unique identification of the true structural symmetry, while x-ray diffraction could not discriminate between the two space groups. CBED patterns perpendicular to the [001] crystal direction showed the 6mm symmetry characteristic of the R (3) over barm space group. This result agrees with early Raman and photoluminescence spectroscopy measurements, The structure is best described by the R (3) over barm space group, with cell parameters a = 3.8728(6) Angstrom and c = 37.0664(1) Angstrom and unit-cell volume V = 481.3(1) Angstrom (3). The length of the c axis can be described by the expression c = N(3.086 +/- 0.003) Angstrom, where N is the number of sulfur layers in the unit cell and Z = N/4 the number of formula units: for our structure N = 12 and Z = 3, The crystal structure consists of a close-packed arrangement of S atoms, with Zn and half of the In atoms distributed in a disorderly fashion in tetrahedral sites, and the other half of the In atoms located in octahedral sites. The atomic positions and an isotropic temperature factor are reported MH - Mexico|Distrito Federal MH - Venezuela PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000168783400019 SO - Semiconductor Science and Technology 2001 ;16(5):367-371 3504 UI - 14426 AU - Lopez-Torres MA AU - Lizarraga-Partida ML AD - Univ Sonora, DICTUS, Unidad Expt Penasco, Puerto Penasco 83550, Sonora, MexicoCICESE, Dept Biotecnol Marina, Ensenada 22860, Baja California, MexicoLizarraga-Partida, ML, Univ Maryland, Inst Biotechnol, Ctr Marine Biotechnol, Columbus Ctr, Suite 236,701 E Pratt St, Baltimore, MD 21202 USA TI - Bacteria isolated on TCBS media associated with hatched Artemia cysts of commercial brands AB - Viable heterotrophic bacteria (VHB)-cultivated on ZoBell media and TCBS media (TCBSB) were enumerated from cysts that were hatched under laboratory sterile conditions as well as in a commercial hatchery without sterile conditions. Since the focus of this work was to study the TCBSB, 10 to 30 colonies growing on TCBS were isolated randomly from each sample. Results from 26 samples of different commercial brands and lots show that VHB concentration is comprised between 10(6) to 10(8) colony forming unites (CFU) per milliliter of Artemia nauplii homogenate. The TCBSB population has show an inverse correlation (R-2 = 0.5795, a = 0.05) with cysts age, with values comprised between < 10(1) to 10(7) CFU/ml. Qualitatively, from 617 isolates, 94% were Gram-positive and only 6% were Gram-negative but oxidase-negative. These basic tests indicate that bacteria of the TCBSB population isolated from Artemia nauplii, do not correspond to Vibrio spp. When cysts of the same brand and same stock where hatched under sterile (laboratory) and nonsterile (commercial hatchery) conditions, Gram-positive bacteria constitute 95% of the bacterial population under sterile manipulation, instant of nonsterile conditions, where Gram-negative bacteria constitute 100% of the bacterial community that was isolated on TCBS medium and that taxonomical studies identified mainly as Vibrio alginolyticus. Those results indicate that Gram-negative heterotrophic bacteria growing on TCBS, normally reported as introduced by Artemia nauplii, are not associated with Artemia cysts but introduced by commercial hatchery operations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000166625400002 L2 - Artemia cysts;TCBS;Vibrio alginolyticus;BRINE SHRIMP; AQUACULTURE; DISEASES SO - Aquaculture 2001 ;194(1-2):11-20 3505 UI - 14045 AU - Lopez HF AU - Salinas A AU - Calderon H AD - Univ Wisconsin, Dept Mat, Milwaukee, WI 53201, USACINVESTAV, Unidad Saltillo, Saltillo, Coahuila, MexicoNatl Polytech Mexico, ESFM, Mexico City 07300, DF, MexicoLopez, HF, Univ Wisconsin, Dept Mat, Milwaukee, WI 53201, USA TI - Plastic straining effects on the microstructure of a Ti-rich NiTi shape memory alloy AB - A Ni-52 at, pet Ti shape memory alloy, cold drawn to 30 pet, was annealed at 1173 K for 1 hour, water quenched, and then subjected to differential scanning calorimetry (DSC). No evidence of the premartensitic R transformation was found during either the forward or the reverse transformation. Microstructurally, it was found that the alloy possessed a relatively large volume fraction (similar to0.05) of coarse second-phase brittle particles. These precipitates acted as preferential sites for martensite plate nucleation and gave rise to a "starlike" morphology. The tensile and compressive properties of the alloy in the as-received condition were also investigated. The alloy exhibited relatively good ductility (fracture strain = 0.28), which was attributed to its inherent ability to relieve or delay the development of plastic instabilities through rapid strain hardening. In addition, X-ray diffraction (XRD) of deformed specimens indicated the presence of an extraintensity peak corresponding to the B2 phase (110)(B2) when the alloy was plastically deformed in compression. Accordingly, it is suggested that plastic deformation induces the reverse transformation to the B2 phase in highly stressed local regions. Transmission electron microscopy (TEM) of deformed martensite structures showed slip lines probably due to dislocation slip, as well as variant interpenetration. Besides, optical and scanning microscopy of regions adjacent to the fractured surfaces indicated that fine martensite plates and/or "apparent" new grains develop at regions of prior stress intensification (former crack-tip regions) during crack propagation MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000167694700008 L2 - MARTENSITIC-TRANSFORMATION; THERMODYNAMIC ANALYSIS; PRECIPITATION; DEFORMATION; CRYSTALS; BEHAVIOR; CRACK; HEAT SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2001 ;32(3A):717-729 3506 UI - 12847 AU - Lopez L AU - Dilley RB AU - Henriquez JA AD - Unidad Enfermedades Circulatorias, Vasc Lab, Tijuana, BC, MexicoScripps Clin, Div Cardiothorac & Vasc Surg, La Jolla, CA, USALopez, L, 539 E J St, Chula Vista, CA 91910, USA TI - Cutaneous hyperpigmentation following venous sclerotherapy treated with deferoxamine mesylate AB - Background. Cutaneous hyperpigmentation after venous sclerotherapy is an adverse sequelae of difficult management. Objective. To evaluate the degree of depigmentation with the use of deferoxamine mesylate (DM) in patients with postsclerotherapy hyperpigmentation treated with polydocanol (POL) for telangiectasias and reticular veins (0.2-5 mm diameter) and varicose veins (5-8 mm diameter). Methods. The experimental group of 36 female patients (mean age 37 years) was divided in two groups. Group I consisted of 30 patients who were treated with POL at 0.25-0.50% concentration for telangiectasias and reticular veins. Group II consisted of six patients with prolonged postsclerotherapy hyperpigmentation (more than 6 months after treatment) in varicose veins that had been treated with POL at 1.5 % concentration each week. Groups I and II were injected with DM 500 mg subcutaneously once a week until 81-100% depigmentation was reached. In group I, DM was injected at the time of sclerotherapy. These groups were compared to their respective control groups with similar conditions but allowing spontaneous depigmentation without DM. Evaluation was undertaken clinically and photographically, and the number of days required to reach the desired depigmentation of 81-100% was determined. Results. When DM was used, depigmentation of 81-100% was observed in group I at 27 days, and for group II in 46 days. In each control group, similar depigmentation was seen at 150 +/- 19 and 255 +/- 11 days, respectively. Comparing results, there was a reduction in the time to depigmentation of 82% for each group (P<.0001). Conclusion. The weekly subcutaneous administration of DM 500 mg reduces the time to depigmentation by 82% in patients with postsclerotherapy cutaneous hyperpigmentation treated for telangiectasias and reticular veins and prolonged postsclerotherapy hyperpigmentation in varicose veins. In this study we could not explain why such variability exists in the length of time to spontaneous depigmentation MH - Mexico|Baja California MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Dermatology;Surgery U5 - J;Article AV - English IS - 1076-0512 UR - ISI:000171022600004 L2 - POSTSCLEROTHERAPY HYPERPIGMENTATION; HYPERTONIC SALINE; MODEL; LASER SO - Dermatologic Surgery 2001 ;27(9):795-798 3507 UI - 13638 AU - Lopez PG AU - Miksis MJ AU - Bankoff SG AD - Northwestern Univ, Robert R McCormick Sch Engn & Appl Sci, Evanston, IL 60208, USALopez, PG, CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, Mexico TI - Stability and evolution of a dry spot AB - The motion of a thin viscous layer of fluid on a horizontal solid surface bounded laterally by a dry spot and a vertical solid wall is considered. A lubrication model with contact line motion is studied. We find that for a container of fixed length the axisymmetric equilibrium solutions with small dry spots are unstable to axisymmetric disturbances. As the size of the dry spot increases, the equilibrium solutions become unstable to nonaxisymmetric disturbances. In addition, we present numerical solutions of the nonlinear evolution equations in the axisymmetric and nonaxisymmetric cases for different values of the parameters. The axisymmetric results show good agreement with existing experimental results. (C) 2001 American Institute of Physics MH - Mexico|Baja California MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-6631 UR - ISI:000168730000011 L2 - CONTACT LINE; SOLID-SURFACE; VISCOUS-FLUID; LIQUID-FILMS; INSTABILITY; DROPS; INTERFACE; MOTION; ANGLES; SHEET SO - Physics of Fluids 2001 ;13(6):1601-1614 3508 UI - 12261 AU - Lorenzo C AU - Serrano-Rios M AU - Martinez-Larrad MT AU - Gabriel R AU - Williams K AU - Gonzalez-Villalpando C AU - Stern MP AU - Hazuda HP AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78284, USAHosp Univ San Carlos, Dept Internal Med, Madrid, SpainHosp La Princesa, Dept Internal Med, Madrid, SpainAmer British Cowdray Hosp, Ctr Studies Diabet, Mexico City, DF, MexicoLorenzo, C, Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, 7703 Floyd Curl Dr, San Antonio, TX 78284 USA TI - Was the historic contribution of Spain to the Mexican gene pool partially responsible for the higher prevalence of type 2 diabetes in Mexican-origin populations? The Spanish Insulin Resistance Study Group, the San Antonio Heart Study, and the Mexico City Diabetes Study AB - OBJECTIVE - Mexican-American populations in San Antonio, Texas (SA-MA) and Mexico have a higher prevalence of type 2 diabetes than non-Hispanic whites in San Antonio (SA-NHW). However, the higher prevalence of type 2 diabetes in Mexican-origin populations might be related, in part, not to Native American genetic admixture but to Spanish genetic admixture. RESEARCH DESIGN AND METHODS - Four population-based epidemiological surveys conducted with Mexican-origin and European-origin samples provided data relevant to this question. in all four surveys, type 2 diabetes was defined as fasting plasma glucose greater than or equal to7.0 mmol/l or 2-h glucose greater than or equal to 11.1 mmol/l or use of antidiabetic agents. RESULTS - A comparison of the two Mexican-origin populations showed that the age- and sex-adjusted prevalence of type 2 diabetes was lower in Mexico than in SA-MA (15.1 vs. 17.9%, P = 0.032). Between the two European-origin populations, the prevalence of type 2 diabetes was lower in SA-NHW than in Spain (6.2 vs. 9.1%, P < 0.0001), but differences were attenuated by adjustment BMI or after stratification by education. In logistic regression analyses, type 2 diabetes was associated with Mexican ethnic origin after adjusting for age, education, BMI, and waist-to-hip ratio. CONCLUSIONS - The prevalence of type 2 diabetes in Spain was intermediate between that in Mexican-origin populations and SA-NHW. Although the higher degree of Native American admixture is a major contributor to the higher rates of type 2 diabetes, we cannot completely rule out a partial contribution of Spanish admixture to diabetes susceptibility among Mexican-origin populations MH - Mexico|Distrito Federal MH - Spain MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 23 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000172519300007 L2 - CARDIOVASCULAR RISK-FACTORS; AMERICANS; HYPERTENSION; MELLITUS SO - Diabetes Care 2001 ;24(12):2059-2064 3509 UI - 13067 AU - Loser H AU - Liao WH AD - UNAM, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoChinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R ChinaLoser, H, UNAM, Inst Geol, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo 83000, Sonora, Mexico TI - Cretaceous corals from Tibet (China) - stratigraphic and palaeobiogeographic aspects AB - The spatial and temporal distribution of Cretaceous coral faunas from the Tibet range is reviewed in detail. The relationship of the Tibetan faunas to other Tethyan or Caribbean faunas is discussed. Obviously the faunas had closer relationships with Tethyan faunas in Asia and Europe than with Caribbean faunas. The rather large number of new species results from a general abundance of corals in certain time spans. The paper is complemented by an appendix, which lists all formations with their localities and coral occurrences. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Sonora MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1367-9120 UR - ISI:000170406900007 L2 - corals;Cretaceous;Tibet;palaeobiogeography SO - Journal of Asian Earth Sciences 2001 ;19(5):661-667 3510 UI - 14172 AU - Losev A AU - Vlaev S AD - Bulgarian Acad Sci, Inst Gen & Inorgan Chem, BG-1113 Sofia, BulgariaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, Zac, MexicoLosev, A, Bulgarian Acad Sci, Inst Gen & Inorgan Chem, 11 G Bonchev Str, BG-1113 Sofia, Bulgaria TI - Modelling electronic spectra of crystals in electric fields with various orientations AB - The present work considers the electronic spectra of a simple two-dimensional (2D) cubic crystal and a three-dimensional (3D) GaAs crystal when a constant electric field is applied. The 2D case is treated within the empirical tight-binding (TB) model, taking one s-orbital per atom and accounting for the interactions with neighbours up to fourth order. For the 3D case a semiempirical sp(3)s* TB model is used, taking into account the spin and first neighbours. The local densities of states (LDOSs) have been calculated for different field intensities, showing that for a sufficiently strong field the 2D LDOS turns into the ID LDOS corresponding to chains perpendicular to the field orientation. This is a novel observation achieved through the use of neighbours farther than the first. The 3D LDOS of a GaAs crystal projected by a strong field on the [001] direction is found to coincide with the 2D LDOS of an isolated atomic layer MH - Bulgaria MH - Mexico|Zacatecas PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000167298700007 L2 - WANNIER-STARK LOCALIZATION; GRADED-GAP SUPERLATTICE; TIGHT-BINDING THEORY; MINIBAND FORMATION; LOCAL-DENSITY; QUANTUM-WELLS; STATES; LADDERS; SOLIDS SO - Physica Status Solidi B-Basic Research 2001 ;223(3):627-634 3511 UI - 12789 AU - Lowry AR AU - Larson KM AU - Kostoglodov V AU - Bilham R AD - Univ Colorado, Dept Phys, Boulder, CO 80309, USAUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USAUniv Colorado, Dept Aerosp Engn, Boulder, CO 80309, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoLowry, AR, Univ Colorado, Dept Phys, Boulder, CO 80309, USA TI - Transient fault slip in Guerrero, southern Mexico AB - The Guerrero region of southern Mexico has accumulated more than 5 m of relative plate motion since the last major earthquake. In early 1998, a continuous CPS site in Guerrero recorded a transient displacement. Modeling indicates that anomalous fault slip propagated from east to west along-strike of the subduction megathrust. Campaign GPS and leveling data corroborate the model. The moment release was equivalent to an M(w)greater than or equal to6.5 earthquake. No M >5 earthquakes accompanied the event, indicating the frictional regime is velocity-strengthening at the location of slip MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 43 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000171217300033 L2 - SEISMICITY; SUBDUCTION; EARTHQUAKE; GAP SO - Geophysical Research Letters 2001 ;28(19):3753-3756 3512 UI - 14100 AU - Lozano K AU - Bonilla-Rios J AU - Barrera EV AD - Univ Texas Pan Amer, Dept Engn, Edinburg, TX 78539, USAInst Tecnol & Estudios Super Monterrey, Monterrey, NL, MexicoRice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005, USALozano, K, Univ Texas Pan Amer, Dept Engn, Edinburg, TX 78539, USA TI - A study on nanofiber-reinforced thermoplastic composites (II): Investigation of the mixing rheology and conduction properties AB - This article is portion of a comprehensive study on the development of nanofiber-reinforced polymer composites for electrostatic discharge materials and structural composites. Vapor-grown carbon fibers with an average diameter of 100 nm were used as a precursor and model fiber system for carbon nanotubes. These nanofibers were purified and functionalized to provide for an open network of high-purity nanofibers. Banbury-type mixing was used to disperse the nanofibers in the polymer matrix. Rheological and microscopic analysis showed that the high shear processing of the polymer/nanofiber mixture led to a homogeneous dispersion of nanofibers with no agglomerates present and no shortening of the nanofibers. The shear thinning behavior of polymeric materials helps in the mixing of the nanofibers to form the composites. A percolation threshold for electrical conduction of 9-18 wt % was observed for the highly dispersed nanofiber networks. The electrical behavior of these materials was not affected by changes in humidity. Microscopic analysis showed highly dispersed nanofibers with no indications of porosity. These conducting polymers are well suited for electrostatic discharge applications, and might well become multifunctional materials for strength/electrical applications. (C) 2001 John Wiley & Sons, Inc MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 79 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000167503200008 L2 - composite;rheological analyses;nanofiber;nanotubes;static dissipative;CARBON-BLACK; POLYMER COMPOSITES; NANOTUBES; RESISTIVITY; WHISKERS; BLENDS; MATRIX SO - Journal of Applied Polymer Science 2001 ;80(8):1162-1172 3513 UI - 11777 AU - Luca F AU - Walsh PG AD - UNAM, Math Inst, Morelia 58089, Michoacan, MexicoUniv Ottawa, Dept Math, Ottawa, ON K1N 6N5, CanadaLuca, F, UNAM, Math Inst, Campus Morelia,Ap Postal 61-3,Xangari, Morelia 58089, Michoacan, Mexico TI - Squares in Lehmer sequences and some Diophantine applications MH - Canada MH - Mexico|Michoacan PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0065-1036 UR - ISI:000173962000004 SO - Acta Arithmetica 2001 ;100(1):47-62 3514 UI - 13204 AU - Luca F AU - Walsh PG AD - Univ Ottawa, Dept Math, Ottawa, ON K2H 5V9, CanadaAcad Sci Czech Republ, Inst Math, CR-11567 Prague 1, Czech RepublicLuca, F, UNAM, Inst Matemat, Campus Morelia,Apartado Postal 61-3 Xangari,CP 58, Morelia, Michoacan, Mexico TI - A generalization of a theorem of Cohn on the equation x(3)-Ny(2)=+/- 1 MH - Canada MH - Czech Republic MH - Mexico|Michoacan PB - TEMPE: ROCKY MT MATH CONSORTIUM RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0035-7596 UR - ISI:000169949800008 L2 - DIOPHANTINE EQUATIONS SO - Rocky Mountain Journal of Mathematics 2001 ;31(2):503-509 3515 UI - 13919 AU - Luca F AU - Krizek M AD - Acad Sci Czech Republ, Inst Math, CR-11567 Prague 1, Czech RepublicLuca, F, UNAM, Inst Matemat, Campus Morelia,Apartado Postal 61-3 Xangari, Morelia 58089, Michoacan, Mexico TI - On the solutions of the congruence n(2) 1 (mod phi(2)(n)) AB - In this note, we show that if n is a positive integer satisfying the congruence n(2) = 1 (mod phi (2) (n)), then n less than or equal to 3 MH - Czech Republic MH - Mexico|Michoacan PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000168042800001 SO - Proceedings of the American Mathematical Society 2001 ;129(8):2191-2196 3516 UI - 13105 AU - Lucio JLM AU - Pestieau J AD - Univ Guanajuato, Inst Fis, Guanajuato 37150, MexicoUniv Catholique Louvain, Inst Phys Theor, B-1348 Louvain, BelgiumLucio, JLM, Univ Guanajuato, Inst Fis, Loma Bosque 103, Guanajuato 37150, Mexico TI - Resonance propagation and threshold singularities AB - We consider the problem of propagation in the framework of quantum field theory in relation to the mass and width definition for an unstable particle. Using unitarity, we show that a renormalization constant free of threshold singularities naturally arises MH - Belgium MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000170331100005 L2 - MASS SO - Modern Physics Letters A 2001 ;16(20):1315-1320 3517 UI - 13565 AU - Luhr JF AU - Henry CD AU - Housh TB AU - randa-Gomez JJ AU - McIntosh WC AD - Smithsonian Inst, Dept Mineral Sci, Washington, DC 20560, USAUniv Nevada, Nevada Bur Mines & Geol, Reno, NV 89557, USAUniv Texas, Dept Geol Sci, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Geol, Unidad Invest Ciencias Tierra, Queretaro 76001, MexicoNew Mexico Bur Mines & Mineral Resources, New Mexico Inst Min & Technol, Socorro, NM 87801, USALuhr, JF, Smithsonian Inst, Dept Mineral Sci, NHB-119, Washington, DC 20560 USA TI - Early extension and associated mafic alkalic volcanism from the southern Basin and Range Province: Geology and petrology of the Rodeo and Nazas volcanic fields, Durango, Mexico AB - East-northeast extension ca, 24 Ma at Rodeo and Nazas, Mexico, was accompanied by eruption of hawaiites, marking some of the earliest intraplate-type mafic alkalic volcanism associated with development of the southern Basin and Range Province. An earlier extensional pulse, 32.3-30.6 Ma, concurrent with subduction-related rhyolitic volcanism of the Sierra Madre Occidental, is the earliest established extension in the southern Basin and Range Province. The Rodeo hawaiites are mostly along or just west of the north-northwest-striking, west-dipping Rodeo fault, a major breakaway fault that separates moderately extended terrane to the west from less extended terrane to the east. Hawaiites and interbedded conglomerates in the Rodeo half graben are flat lying to gently tilted and cut by the Rodeo fault. Underlying Eocene-Oligocene ash-flow tuffs to the west are cut by numerous west-dipping faults and tilted as much as 40 degrees, Nazas hawaiites are also along north-northwest-striking faults but are generally unfaulted, Like other Miocene mafic alkalic volcanic rocks from the southern Basin and Range Province, those from Rodeo and Nazas are characterized by (I) moderately evolved hawaiitic compositions, (2) abundant megacrysts, including sodic plagioclase (An(26-51)), olivine (similar to Fo(55)), Al-augite (7-9 wt% Al2O3), and a wide variety of spinels, (3) lack of granulitic or peridotitic xenoliths, (4) variable Cs enrichments, and (5) isotopic compositions that indicate interaction with crust (Sr-87/Sr-86(i) = 0.7037-0 7041; epsilon (Nd) = 4.8-2.8; Pb-206/Pb-204(i) = 18.91-18.77; Pb-207/Pb-204(i) = 15.57-15.60), These observations are consistent with a model whereby Miocene intraplate-type magmas rose slowly through the lithosphere, differentiating and interacting with the crust, The megacrysts are interpreted as disrupted gabbroic bodies, formed by slow cooling of mafic alkalic magmas that stagnated in the lower crust, possibly during the earlier extensional episode, Many of the elemental and isotopic parameters used to probe mantle sources of mafic volcanic rocks have been seriously obscured by crystallization, crustal interaction, and megacryst incorporation, complicating efforts to identify temporal changes in mantle source regions during development of the southern Basin and Range Province MH - USA MH - Mexico|Queretaro PB - COLLEGE STN: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000169052300008 L2 - Basin and Range Province;contamination (magma);Durango Mexico;extension faults;hawaiite;Miocene;LATE CENOZOIC EXTENSION; LOWER CRUSTAL XENOLITHS; TRANS-PECOS TEXAS; SAN-LUIS-POTOSI; RIO-GRANDE RIFT; TRACE-ELEMENTS; ISOTOPIC EVIDENCE; DISTRIBUTION COEFFICIENTS; PARTITION-COEFFICIENTS; BASALTIC VOLCANISM SO - Geological Society of America Bulletin 2001 ;113(6):760-773 3518 UI - 12839 AU - Luk'yanov AG AU - Utkin VI AU - Dodds SJ AU - Vittek J AD - Univ E London, Sch Elect & Mfg Engn, Fac Design Engn & Built Environm, London E16 2RD, EnglandIPN, CINVESTAV, Dept Elect Engn, Guadalajara 44550, Jalisco, MexicoOhio State Univ, Dept Elect Engn, Columbus, OH 43210, USAUniv Zilina, Dept Elect Tract & Energet, Zilina 01026, SlovakiaDodds, SJ, Univ E London, Sch Elect & Mfg Engn, Fac Design Engn & Built Environm, Docklands Campus,4 Univ Way, London E16 2RD, England TI - Decomposed control design for non-stationary plants subject to disturbances AB - This paper combines the block (Luk'yanov and Utkin 1982, 1998), sliding mode and high gain control techniques (Utkin 1992) to form a new decomposed control law suitable for general multivariable non-stationary plants. Different versions of the control law are developed with various dependencies on plant parameters and state variables. The new control law is demonstrated by simulation of its application to an electrical drive employing a dc motor with controlled flux MH - United Kingdom MH - Mexico|Jalisco MH - Slovakia MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000171003300005 SO - International Journal of Control 2001 ;74(13):1335-1352 3519 UI - 13088 AU - Luna-Perez P AU - Rodriguez-Ramirez S AU - Rodriguez-Coria DF AU - Fernandez A AU - Labastida S AU - Silva A AU - Lopez MJ AD - Inst Mexicano Seguro Social, Ctr Med Nacl Siglo 21, Hosp Oncol, Dept Surg Oncol,Colorectal Serv, Mexico City 06720, DF, MexicoInst Mexicano Seguro Social, Ctr Med Nacl Siglo 21, Hosp Oncol, Dept Radiotherapy, Mexico City 06720, DF, MexicoInst Mexicano Seguro Social, Ctr Med Nacl Siglo 21, Hosp Oncol, Stat Sect, Mexico City 06720, DF, MexicoInst Mexicano Seguro Social, Ctr Med Nacl Siglo 21, Hosp Oncol, Dept Med Oncol, Mexico City 06720, DF, MexicoTufts Univ, Sch Med, St Elizabeths Med Ctr Boston, Dept Surg, Boston, MA 02135, USALuna-Perez, P, Puerto Mexico 53-101,Colonia Roma Sur, Mexico City 06760, DF, Mexico TI - Preoperative chemoradiation therapy and anal sphincter preservation with locally advanced rectal adenocarcinoma AB - Preoperative irradiation has been used to produce tumor regression and allow complete resection of rectal cancer with a sphincter-saving procedure. To evaluate the associated toxicity, the response in the primary tumor, and the postsurgical morbidity in a group of patients with locally advanced rectal cancer treated with preoperative chemoradiation therapy and low anterior resection, 120 patients were treated with 45 Gy of preoperative radiotherapy and a bolus infusion of 5-fluorouracil 450 mg/m(2) on days 1to 5 and 28 to 32 of radiotherapy. Four to six weeks later, 16 lesions were found unresectable; 36 patients underwent abdominoperineal resection or pelvic exenteration, and in the remaining 68 a low anterior resection was performed. For the purpose of this study only the latter group was included. There were 38 men and 30 women, with a mean age of 54.7 +/- 13.1 years. Gastrointestinal and hematologic acute toxicity grade 3 to 4 occurred in 12 and 7 patients, respectively. The mean distance of the tumor above the anal verge was 8.2 +/- 2.6 cm. In 10 patients the surgical resection included neighboring pelvic organs; 16 patients (23.5%) required a temporary diverting colostomy. The main causes of surgical morbidity were clinical anastomotic leakage in seven (10%), abdominal wall infection in five (7.4%), anastomotic stenosis in three (4.5%), and intraabdominal abscess in one (1.5%). No operative deaths occurred. The postsurgical stages were as follows: no tumor in the specimen, 17 (25%); T1, 4 (6%); T2, 12 (17%); T3, 17 (25%); T4, 5 (7%); any T with N+, 9 (13%); and any T, N with M+, 4 (6%). The median and mean follow-ups were 30.0 months and 37.4 +/- 25.0 months, respectively. The local recurrence rate was 2.9%, and the distant recurrence rate was 17%. The administration of preoperative chemoradiation therapy for locally advanced rectal cancer is associated with tolerable toxicity, a high rate of response in the primary tumor that allowed anal sphincter preservation, and a low rate of local recurrence MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 19 U4 - Surgery U5 - J;Article AV - English IS - 0364-2313 UR - ISI:000170337300008 L2 - CONCURRENT RADIATION-THERAPY; LOW-DOSE LEUCOVORIN; COLORECTAL-CANCER; RANDOMIZED TRIAL; ADJUVANT THERAPY; ACUTE TOXICITY; CARCINOMA; 5-FLUOROURACIL; CHEMOTHERAPY; SURGERY SO - World Journal of Surgery 2001 ;25(8):1006-1011 3520 UI - 10900 AU - Luna S AU - Figueroa J AU - Baltazar B AU - Gomez R AU - Townsend R AU - Schoper JB AD - Pioneer HiBred Int Inc, Johnston, IA 50131, USAPioneer Mexico, Mexico City, DF, MexicoSchoper, JB, Pioneer HiBred Int Inc, POB 1004, Johnston, IA 50131, USA TI - Maize pollen longevity and distance isolation requirements for effective pollen control AB - Pollen is an important vector of gene now in maize (Zea mays L.). Experiments were conducted to investigate the duration of pollen viability and the effectiveness of isolation distance for controlling gene flow. Pollen longevity was tested by collecting pollen at dehiseence and exposing it in a thin layer in the open air and sunshine for prescribed time periods before assessing pollen viability by measuring seed set after pollination and scoring visual appearance. Isolation distance efficacy was evaluated by growing 12.8-m(2) plot of maize at various distances from a 4000-m(2) pollen source. The pollinator contained either a genetic leaf or seed marker that allowed pollen now to be measured. Pollen maintained viability for I to 2 h after dehiscence depending on atmospheric water potential. The theoretical, maximum distance viable pollen could move was 32 km, assuming pollen was transported linearly at the maximum average afternoon windspeeds for our location, viability was maintained for 2 h, and pollen settling rate was ignored. Cross pollinations occurred at a maximum distance of 200 m from the source planting, and only a limited number of cross pollinations occurred at the shortest distance (100 m). No cross pollinations occurred at 300 m from the source planting. The results are consistent with conclusions that maize pollen is desiccation intolerant and has a high settling rate. The results indicate isolation distance can be a useful tool for controlling gene flow via pollination in research scale plantings MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000176236800028 L2 - WATER POTENTIALS; ZEA-MAYS; MEXICO; SILK; POLLINATION; VIABILITY SO - Crop Science 2001 ;41(5):1551-1557 3521 UI - 13719 AU - Luo F AU - Hernandez-Cordero J AU - Morse TF AD - Boston Univ, Photon Ctr, Lab Lightwave Technol, ECE, Boston, MA 02215, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoLuo, F, Boston Univ, Photon Ctr, Lab Lightwave Technol, ECE, Boston, MA 02215 USA TI - Multiplexed fiber-optic Bragg stack sensors (FOBSS) for elevated temperatures AB - A novel fiber-optic technique for the measurement of temperature is demonstrated, By depositing alternating quarter-wave layers of silicon nitrite and silicon-rich silicon nitrite at the end of an optical fiber, we can fabricate the equivalent of a Bragg grating of a high-temperature material to form a fiber Bragg stack sensor. When heated, the Bragg stack expands and a change in wavelength of the reflective peak is registered, Thus, the wavelength of peak reflectivity is a function of temperature, The sensors, which have previously been shown to be capable of surviving temperatures in excess of 900 degreesC, can be wavelength division multiplexed, Using a CCD solid-state spectrometer, we demonstrate the multiplexing of eight temperature sensors, Crosstalk effects, arising from the side lobes observed in the wave stack spectra, limit the performance of the multiplexed sensors. We show that this problem can be minimized by apodizing the Bragg stacks during fabrication, Currently, the sensor system is estimated to have a temperature resolution of 2 degreesC using a CCD spectrometer with a spectral resolution of 2.1 nm MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000168623000038 L2 - Bragg reflectors;fiber-optic sensors;temperature sensing;thin film SO - Ieee Photonics Technology Letters 2001 ;13(5):514-516 3522 UI - 12266 AU - Luridiana V AU - Cervino M AU - Binette L AD - European So Observ, D-85748 Munich, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoMax Planck Inst Extraterr Phys, D-85748 Munich, GermanyLuridiana, V, European So Observ, Karl Schwarzschild Str 2, D-85748 Munich, Germany TI - Can stellar winds account for temperature fluctuations in HII regions? The case of NGC 2363 AB - We compare the rate of kinetic energy injected by stellar winds into the extragalactic H II region NGC 2363 to the luminosity needed to feed the observed temperature fluctuations. The kinetic luminosity associated to the winds is estimated by means of two different evolutionary synthesis codes, one of which takes into account the statistical fluctuations expected in the Initial Mass Function. We find that, even in the most favorable conditions considered by our model, such luminosity is much smaller than the luminosity needed to account for the observed temperature fluctuations. The assumptions underlying our study are emphasized as possible sources of uncertainty affecting our results MH - Germany MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000172505100026 L2 - HII regions;ISM : individual (NGC 2366, NGC 2363);stars : clusters;STAR-FORMATION; PLANETARY-NEBULAE; GALAXY NGC-2366; EVOLUTION; CLUSTER; ENERGY; MODELS SO - Astronomy & Astrophysics 2001 ;379(3):1017-1023 3523 UI - 13441 AU - Luridiana V AU - Peimbert M AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoLuridiana, V, Observ Midi Pyrenees, Astrophys Lab, 14 Ave E Belin, F-31400 Toulouse, France TI - The structure and star information history of NGC 5461 MH - France MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000169429100054 L2 - H Pi regions;ISM : abundances;ISM : individual (NGC 5461);stars : formation;H-II-REGIONS; CHEMICAL-COMPOSITION; PHYSICAL CONDITIONS; PLANETARY-NEBULAE; HELIUM ABUNDANCE; SYNTHESIS MODELS; HII-REGIONS; M101; GALAXIES; EMISSION SO - Astrophysical Journal 2001 ;553(2):633-644 3524 UI - 12690 AU - Lutz D AU - Dunlop JS AU - Almaini O AU - Andreani P AU - Blain A AU - Efstathiou A AU - Fox M AU - Genzel R AU - Hasinger G AU - Hughes D AU - Ivison RJ AU - Lawrence A AU - Mann RG AU - Oliver S AU - Peacock JA AU - Rigopoulou D AU - Rowan-Robinson M AU - Scott S AU - Serjeant S AU - Tacconi L AD - Max Planck Inst Extraterr Phys, D-85741 Garching, GermanyUniv Edinburgh, Dept Phys & Astron, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandRoyal Observ, UK ATC, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, EnglandInst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoOsserv Astron Padova, I-35122 Padua, ItalyUniv Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandAIP, D-14482 Potsdam, GermanyUniv Kent, Unit Space Sci & Astrophys, Canterbury CT2 7NR, Kent, EnglandLutz, D, Max Planck Inst Extraterr Phys, Postfach 1312, D-85741 Garching, Germany TI - The extended counterpart of submm source Lockman 850.1 AB - The IRAM Plateau de Bure mm interferometer and deep K-band imaging have been used to identify the brightest submm source detected in the Lockman field of the UK 8 mJy SCUBA survey. The near infrared counterpart is an extended (20-30 kpc), clumpy, and extremely red object. The spectral energy distribution suggests it to be a dusty star forming object at a redshift of about 3 (2-4). Its star formation rate and near-infrared properties are consistent with Lockman 850.1 being a massive elliptical in formation MH - United Kingdom MH - Germany MH - Italy MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 37 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171486600014 L2 - galaxies : active;galaxies : individual : Lockman 850.1;galaxies : starburst;infrared : galaxies;DEEP SUBMILLIMETER SURVEY; REDSHIFT RADIO GALAXIES; STAR-FORMING GALAXIES; X-RAY SOURCES; ELLIPTIC GALAXIES; SPECTRAL INDEX; FIELD; IDENTIFICATIONS; ULTRAVIOLET; RESOLUTION SO - Astronomy & Astrophysics 2001 ;378(1):70-75 3525 UI - 13826 AU - Luyo-Alvarado J AU - Melendez-Lira M AU - Lopez-Lopez M AU - Goto S AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoOptoelect Technol Res Lab, Tsukuba, Ibaraki 36026, JapanLopez-Lopez, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Built-in electric fields in GaAs/GaAs structures with different in situ substrate treatments AB - We have prepared GaAs substrates prior to molecular beam epitaxial growth by the following in situ treatments: (1) The usual thermal cleaning under an arsenic flux, (2) cleaning by hydrogen radicals (H*), and (3) exposure to trisdimethylaminoarsine (TDMAAs). The effects of these treatments on the optical properties and built-in electric fields in GaAs/GaAs structures were studied. In order to investigate the effects of the substrate type on the properties of the GaAs epilayers, undoped semi-insulating (SI) GaAs (100) and Si-doped n(+)-GaAs(100) substrates were used. Reflection high-energy electron diffraction during the growth, and atomic force microscopy in air showed that the smoothest surface morphology was obtained for the layer grown on a H*-cleaned SI substrate at 570 degreesC. For Si-doped substrates the smoothest layer was obtained on a TDMAAs-treated substrate. The concentrations of interfacial residual impurities of C and O were measured by secondary ion mass spectroscopy (SIMS). For SI substrates, the usual thermal cleaning process resulted in very high concentrations of C (2X10(19) atoms/cm(3)) and O (1.3x10(18) atoms/cm(3)) at the interface. The impurities were drastically diminished to below the SIMS detection limit by using H*-cleaning. We observed higher concentrations of impurities on Si-doped substrates. Internal electric fields due to the interfacial impurities were detected by the presence of Franz-Keldysh oscillations in the room temperature photoreflectance spectra. The samples with the highest amount of interfacial impurities presented the strongest internal electric fields. Photoluminescence results showed a clear correlation between the amount of interfacial impurities and signal intensity, the lower the impurity content the stronger the photoluminescence intensity. The signal associated with carbon impurities dominates the photoluminescence spectra for GaAs layers grown on SI substrates, while for samples grown on Si-doped substrates the signal coming from the substrate is the dominant one. (C) 2001 American Vacuum Society MH - Japan MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000168308200029 L2 - MOLECULAR-BEAM EPITAXY; GAAS SUBSTRATE; SURFACE; PHOTOLUMINESCENCE; SPECTROSCOPY; DESORPTION; INTERFACE SO - Journal of Vacuum Science & Technology B 2001 ;19(2):495-501 3526 UI - 12224 AU - Luzon F AU - Al Yuncha Z AU - Sanchez-Sesma FJ AU - Ortiz-Aleman C AD - Univ Almeria, Dept Fis Aplicada, Almeria 04120, SpainUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoLuzon, F, Univ Almeria, Dept Fis Aplicada, Canada de San Urbano S-N, Almeria 04120, Spain TI - A numerical experiment on the horizontal to vertical spectral ratio in flat sedimentary basins AB - In this paper we study the seismic response of flat sedimentary basins and carry out numerical experiments to determine the extent to which we could go using the Horizontal to Vertical Spectral Ratio (HVSR) for a given site. The HVSR has been used by many researchers to characterize local conditions in terms of the dynamic response of the soil, and one of its variants, that proposed by NAKAMURA (1989) in which records of microtremors are used, is one of the most applied in recent years. We study the response of different configurations under incident waves coming from an explosive source using the Indirect Boundary Element Method (IBEM), and we investigate,two cases: low- and high-velocity contrast. We compute the seismic response using the HVSR technique at various locations in the free surface of the basins, and compare it with the response calculated with the horizontal Sediment to Bedrock Spectral Ratio (SBSR) and with the Horizontal Component (HC) of the transfer function for the displacement at the same locations. The comparison shows that, in general, HVSR cannot provide the predominant period of a site due to the fact that this technique cannot predict accurately the Spectral amplification levels. On the other hand, the HVSR provides an erroneous response in the sedimentary basins which have a low-impedance contrast, with respect to bedrock, and with shape ratios like the one studied here, whereas it can reasonably well predict the fundamental local frequency when there is a high-impedance contrast, except in the center of the basin MH - Mexico|Distrito Federal MH - Spain PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0033-4553 UR - ISI:000172568700010 L2 - Nakamura's technique;numerical modeling;HVSR;indirect boundary element method (IBEM);BOUNDARY-ELEMENT METHOD; SEISMIC RESPONSE; RAYLEIGH-WAVES; GROUND-MOTION; INCIDENT-P; VALLEYS; SV SO - Pure and Applied Geophysics 2001 ;158(12):2451-2461 3527 UI - 13319 AU - Ma HM AU - Hakim LF AU - Bowman CN AU - Davis RH AD - Univ Colorado, Dept Chem Engn, Boulder, CO 80309, USAMonterrey Inst Technol, Monterrey, MexicoDavis, RH, Univ Colorado, Dept Chem Engn, Boulder, CO 80309, USA TI - Factors affecting membrane fouling reduction by surface modification and backpulsing AB - Several factors affecting microfiltration membrane fouling and cleaning, including backpulsing, crossflushing, backwashing, particle size, membrane surface chemistry, and ionic strength, were investigated with suspensions of latex beads. Approximately two-fold permeate volume enhancements over 1 h of filtration were obtained by using water or gas backpulsing, and 50% enhancement was obtained with crossflushing, for filtration of 1.0 mum diameter carboxylate modified latex (CML) particles using unmodified polypropylene (PP) membranes of 0.3 mum nominal pore diameter. When 0.2 mum diameter CML particles or mixtures of 1.0 and 0.2 mum CML particles were used, however. the average flux decreased 60% compared with using 1.0 mum CML particles for experiments with or without backpulsing. PP membranes were rendered hydrophilic with neutral or positively on negatively charged surfaces by grafting monomers of poly(ethylene glycol 200) monomethacrylate (PEG200MA), dimethyl aminoethyl methacrylate (DMAEMA), or acrylic acid (AA), respectively, to the base PP membranes. Filtration experiments show that fouling is not strongly dependent on membrane surface chemistry for filtration of 1.0 mum CML particles without backpulsing. With backpulsing, however. a 10% increase and a 20% decrease of permeate volumes collected in 1 h were observed when the CML particles and the membranes had like charges and opposite charges, respectively, compared to the permeate collected with the unmodified membrane. Using the PP membranes modified with AA, permeate volumes with backpulsing decreased 30 and 40% when NaCl concentrations of 0.01 and 0.1 M, respectively, were added to the feed. However, the permeate volumes did not vary significantly with changing ionic strength for filtration without backpulsing. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0376-7388 UR - ISI:000169714800009 L2 - backpulsing;membrane surface modification;microfiltration;fouling;CROSS-FLOW MICROFILTRATION; NATURAL ORGANIC-MATTER; FLUX; FILTRATION; OPTIMIZATION SO - Journal of Membrane Science 2001 ;189(2):255-270 3528 UI - 13551 AU - Macek M AU - Simek K AU - Bittl T AD - Acad Sci Czech Republ, Inst Hydrobiol, CZ-37005 Ceske Budejovice, Czech RepublicInst Freshwater Ecol & Inland Fisheries, D-16775 Neuglobsow, GermanyMacek, M, Natl Autonomous Univ Mexico, Campus Iztacala, Mexico City 54090, DF, Mexico TI - Conspicuous peak of oligotrichous ciliates following winter stratification in a bog lake AB - We analyzed early spring protozooplankton peaks following winter stratification in two different basins (northeast, NE; southwest, SW) of an artificially-divided bog lake Grobe Fuchskuhle (Brandenburg, Germany). The maximum ciliate biomass and numbers (660 and 990 mug l(-1) of organic carbon, and 290 and 260 cells ml(-1) in NE and SW, respectively) were reached in the surface layer during the ice melting and then continuously decreased. The surface layers were numerically dominated by species of the genus Urotricha, while in the ciliate biomass during the first part of the study, a mixotrophic oligotrich, Pelagostrombidium mirabile prevailed (C-org up to 940 mug l(-1)). We observed a conspicuous ciliate peak that could not be related to the feeding activity of the dominant ciliate species upon picoplankton. Seemingly, the peak was related to the specific conditions resulting from the ice melting where these ciliates could be concentrated. Additionally, the mixotrophy of oligotrichous species allowed them to penetrate below the oxycline, although feeding on nanoplankton such as flagellates was also very likely. Our direct measurements of uptake rates of bacteria showed that the abundant strombidiids were not nutritionally dependent on bacterivory. However, the ciliate uptake rate (up to 670 bacteria ciliate(-1) h(-1)) contributed significantly to the overall bacteria mortality rate. The maximum (community average) cell-specific ciliate feeding rate of over 200 bacteria ciliates(-1) h(-1) was reached, along with an increasing contribution of scuticociliates, paralleled by a drop in large oligotrichs MH - Czech Republic MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0142-7873 UR - ISI:000169006800002 L2 - QUANTITATIVE PROTARGOL STAIN; MICROBIAL COMMUNITIES; TROPHIC INTERACTIONS; MIXOTROPHIC CILIATE; MESOTROPHIC LAKE; GROWTH-RATES; FOOD-WEB; WATER; STROMBIDIUM; PROTOZOA SO - Journal of Plankton Research 2001 ;23(4):353-363 3529 UI - 13722 AU - Macfarlane A AU - Mondragon-Gonzalez R AU - Vega-Lopez F AU - Wieles B AU - de Pena J AU - Rodriguez O AU - de la Torre RS AU - de Vries RRP AU - Ottenhoff THM AU - Dockrell HM AD - Univ London London Sch Hyg & Trop Med, Immunol Unit, Dept Infect & Trop Dis, London WC1E 7HT, EnglandLeiden Univ Hosp, Med Ctr, Blood Bank, NL-2300 RC Leiden, NetherlandsLeiden Univ Hosp, Med Ctr, Dept Immunohematol, NL-2300 RC Leiden, NetherlandsHosp Amigo del Nino & la Mujer, Inst Mexicano Seguro Social, Celaya, GTO, MexicoCtr Dermatol Dr Ladislao de la Pascua, Mexico City, DF, MexicoHosp Especialidades Dr Bernardo Sepulveda, Dept Dermatol & Med Mycol, Unidad Invest Med Dermatol & Micol Dr Ernesto Mac, Mexico City, DF, MexicoDockrell, HM, Univ London London Sch Hyg & Trop Med, Immunol Unit, Dept Infect & Trop Dis, Keppel St, London WC1E 7HT, England TI - Presence of human T-cell responses to the Mycobacterium leprae 45-kilodalton antigen reflects infection with or exposure to M-leprae AB - The ability of the 45-kDa serine-rich Mycobacterium leprae antigen to stimulate peripheral blood mononuclear cell (PBMC) proliferation and gamma interferon (IFN-gamma) production was measured in leprosy patients, household contacts, and healthy controls from areas of endemicity in Mexico, Almost all the tuberculoid leprosy patients gave strong PBMC proliferation responses to the M. leprae 45-kDa antigen (92.8%; n = 14), Responses were lower in lepromatous leprosy patients (60.6%; n = 34), but some responses to the 45-kDa antigen were detected in patients unresponsive to M. leprae sonicate. The proportion of positive responses to the M. leprae 45-kDa antigen was much higher in leprosy contacts (88%; n = 17) than in controls from areas of endemicity (10%; n = 20), None of 15 patients with pulmonary tuberculosis gave a positive proliferation response to the 45-kDa antigen. The 45-kDa antigen induced IFN-gamma secretion similar to that induced by the native Mycobacterium tuberculosis 30/31-kDa antigen in tuberculoid leprosy patients and higher responses than those induced by the other recombinant antigens (M, leprae 10- and 65-kDa antigens, thioredoxin, and thioredoxin reductase); in patients with pulmonary tuberculosis it induced lower IFN-gamma secretion than the other recombinant antigens, These results suggest that the M. leprae 45-kDa antigen is a potent T-cell antigen which is M. leprae specific in these Mexican donors. This antigen may therefore have diagnostic potential as a new skin test reagent or as an antigen in a simple whole-blood cytokine test MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Netherlands PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1071-412X UR - ISI:000168664400025 L2 - LEPROSY PATIENTS; PROTEIN ANTIGENS; FUNCTIONAL-CHARACTERIZATION; THIOREDOXIN REDUCTASE; LEPROMATOUS LEPROSY; HOUSEHOLD CONTACTS; IMMUNE-RESPONSES; HEALTHY CONTROLS; KDA PROTEIN; BOVIS BCG SO - Clinical and Diagnostic Laboratory Immunology 2001 ;8(3):604-611 3530 UI - 12422 AU - Macias AE AU - Wong SW AU - Sadowsky DW AU - Luetjens CM AU - Axthelm MK AU - Gravett MG AU - Haluska GJ AU - Novy MJ AD - Oregon Reg Primate Res Ctr, Div Reprod Sci, Beaverton, OR 97006, USAUniv Guanajuato, Sch Med, Dept Microbiol, Leon, MexicoOregon Reg Primate Res Ctr, Div Pathobiol & Immunol, Beaverton, OR 97006, USAUniv Munster, Inst Reprod Med, D-4400 Munster, GermanyOregon Hlth Sci Univ, Dept Obstet & Gynecol, Portland, OR 97201, USANovy, MJ, Oregon Reg Primate Res Ctr, Div Reprod Sci, 505 NW 185th Ave, Beaverton, OR 97006 USA TI - Maternal or fetal origin of rhesus monkey (Macaca mulatta) amniotic fluid leukocytes can be identified by polymerase chain reaction using the zinc finger Y gene AB - Leukocytes can be found in substantial numbers within the intrauterine tissues and amniotic fluid of women, and play a central role in the pathophysiology of infection-related preterm labor by their production of proinflammatory mediators. It remains unclear whether these leukocytes represent a fetal immune response, a maternal response, or a combination of the two. The objective of this study was to develop a test in the rhesus monkey (Macaca mulatta) suitable for determining the percentage of male fetal cells present in a population of leukocytes recovered from blood or amniotic fluid. We found inadequate specificity for rhesus monkey cells using commercial human Y-chromosome paint kits (fluorescence in situ hybridization (FISH)) Human-specific primers for the repetitive Y chromosome DYZ-1 locus employed in the polymerase chain reaction (PCR) produced an unacceptable percentage of false positives. However, we successfully developed a PCR-based test using rhesus-specific primers for the zinc finger Y (ZFY) locus. Densitometry of PCR products from known ratios of male and female adult peripheral leukocytes generated a linear standard curve which provided quantitative results and required only 400 cells per sample. The rhesus beta globin (RBG) gene served as an internal control. The PCR test correctly discriminated the sex of peripheral leukocytes in 20 adult males, 20 adult females, two male fetuses, and one female fetus. Serial samples of amniotic fluid from four chronically catheterized rhesus monkeys bearing male fetuses were used to confirm the utility of this assay for quantifying fetal cells in amniotic fluid. In conclusion, we have developed a PCR test which is suitable for distinguishing male from female cells in adult and fetal blood and in amniotic fluid, which lends itself to a variety of diagnostic and biologic applications in the rhesus monkey and potentially in other nonhuman primates. (C) 2001 Wiley-Liss, Inc MH - Germany MH - Mexico|Guanajuato MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0275-2565 UR - ISI:000172107900003 L2 - Macaca mulatta;sex chromosomes;polymerase chain reaction;ZFY gene;amniotic fluid;leukocytes;PRENATAL SEX DETERMINATION; DNA AMPLIFICATION; PERIPHERAL-BLOOD; CHROMOSOME; ZFY; SEQUENCE; CELLS; AMELOGENIN; EVOLUTION; PRIMATES SO - American Journal of Primatology 2001 ;55(3):159-170 3531 UI - 12287 AU - Macias ER AU - Gonzalez A AU - Manero O AU - Gonzales-Nunez R AU - Soltero JFA AU - Attane P AD - Univ Grenoble 1, Lab Rheol, INPG, CNRS UMR 5520, F-38041 Grenoble 9, FranceUniv Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAttane, P, Univ Grenoble 1, Lab Rheol, INPG, CNRS UMR 5520, BP 53, F-38041 Grenoble 9, France TI - Flow regimes of dilute surfactant solutions AB - The shear-thickening of dilute surfactant solutions is investigated using water/cethyltrimethylammonium tosylate (CTAT) systems. We show that shear induced structures (SIS) are obtained in Couette and parallel-plate flows when the shear stress is higher than a critical shear stress, independently of the type of shear cell. Three different regimes are observed in Couette flow, confirming the results of Hu and co-workers on TTAA/NaSal/water systems. Flow regimes in parallel-plate flow geometries are studied with the aid of particle image velocimetry (PIV). Particular attention is paid to the calibration of the experimental set-up using pure water in order to distinguish between deviations of the rheometric velocity profile due to the onset of purely hydrodynamic instabilities from those due to the occurrence of SIS. It is noteworthy that spatial and temporal fluctuations in the local velocity fields are observed when SIS exists, even when rheometric measurements show an apparently steady-state situation. When no SIS is present we found that the surfactant solutions behave like Newtonian fluids. Laminar secondary flows are present for both cells under the same conditions as those found for classical hydrodynamics. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mechanics U5 - J;Article AV - English IS - 0377-0257 UR - ISI:000172457000009 L2 - shear-thickening;dilute surfactant solutions;particle image velocimetry;rheometry;shear induced structure;SHEAR-INDUCED PHASE; TOSILATE-WATER SYSTEM; RHEOLOGICAL BEHAVIOR; MICELLAR SOLUTIONS; WORMLIKE MICELLES; TRANSITIONS; VISCOMETER; DYNAMICS; FRACTURE SO - Journal of Non-Newtonian Fluid Mechanics 2001 ;101(1-3):149-171 3532 UI - 11232 AU - mador-Ramirez MD AU - Wilson RG AU - Martin AR AD - Univ Nebraska, Dept Agron, Lincoln, NE 68583, USAUniv Nebraska, Panhandle Res & Extens Ctr, Scottsbluff, NE 69361, USAAmador-Ramirez, MD, INIFAP, Campo Expt Calera,Apartado Postal 18, Zac 98500, Mexico TI - Weed control and dry bean (Phaseolus vulgaris) response to in-row cultivation, rotary hoeing, and herbicides AB - Field experiments were conducted in 1996 and 1997 to evaluate weed control and dry bean response to mechanical tillage and herbicide treatments. Herbicide treatments were EPTC plus ethalfluralin, dimethenamid, and imazethapyr plus bentazon. Herbicides were applied alone or combined with rotary hoeing and in-row cultivation. Differences in dry bean yields between years were due to differences in weed density. Weed species included redroot pigweed, common lambsquarters., hairy nightshade, wild proso millet, and green foxtail. Weed density in the untreated check plots at the end of the growing season was 35 plants/m(2) in 1996 and 134 plants/m2 in 1997. Dry bean stands were not reduced by rotary hoeing, in-row cultivation, and herbicides in 1996, but in-row cultivation reduced dry bean populations 27% compared to the hand-weeded check in 1997. In-row cultivation and rotary hoeing provided similar weed control in both years. At low weed densities, either mechanical tillage or herbicides alone were effective in suppressing weeds, whereas at higher densities, herbicides combined with mechanical tillage were required for effective control MH - Mexico|Zacatecas MH - USA PB - LAWRENCE: WEED SCI SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0890-037X UR - ISI:000175240900007 L2 - combinations;herbicides and mechanical tillage;postemergence herbicides;preemergence herbicides;preplant-incorporated herbicides;CORN ZEA-MAYS; SOYBEAN GLYCINE-MAX; POSTEMERGENCE IMAZETHAPYR; CONTROL SYSTEMS; MANAGEMENT; TILLAGE; INTERFERENCE; BENTAZON; EFFICACY; PROGRAMS SO - Weed Technology 2001 ;15(3):429-436 3533 UI - 13372 AU - Madrigal M AU - Quintana VH AD - Inst Tecnol Morelia, Morelia, Michoacan, MexicoUniv Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, CanadaMadrigal, M, Inst Tecnol Morelia, Morelia, Michoacan, Mexico TI - Existence and determination of competitive equilibrium in unit commitment power pool auctions: Price setting and scheduling alternatives AB - The existence, determination and effects of competitive market equilibrium for unit commitment power pool auctions are investigated in this paper. When an equilibrium does not exist, under specific situations, conflictive multiple optimal primal solutions may exist. When an equilibrium exists, multiple primal solutions do not represent conflicts of interest, The existence or nonexistence of competitive equilibrium can be determined if the dual problem is solved to optimality, If equilibrium does not exist, there is excess supply at the optimal dual solution, which can be used to define priority orders and price setting alternatives to determine a final schedule, and avoid the conflicts of interest and revenue deficiency. Under disequilibrium, the optimal dual variables are not market clearing prices; a nonuniform pricing rule that avoids the flaws and complications of other pricing rules, such as maximum average cost and price minimization auctions, is proposed in the paper. The proposed scheduling and price-setting alternatives show that unit commitment models can be used in a market environment MH - Canada MH - Mexico|Michoacan PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000169592700009 L2 - MARKETS SO - Ieee Transactions on Power Systems 2001 ;16(3):380-388 3534 UI - 13117 AU - Magallanes R AU - Shah S AU - Zadok D AU - Chayet AS AU - Assil KK AU - Montes M AU - Robledo N AD - Ctr Oftalmol Tijuana, Tijuana, BC, MexicoUniv Calif Los Angeles, Jules Stein Eye Inst, Los Angeles, CA 90024, USASinskey Eye Inst, Santa Monica, CA, USAChayet, AS, Codet Eye Inst, Ave Padre Kino 10159, Tijuana 22320, BC, Mexico TI - Stability after laser in situ keratomileusis in moderately and extremely myopic eyes AB - Objective: To evaluate the stability, mechanism, and degree of regression following laser in situ keratomileusis (LASIK) in cases with moderate to extreme myopia after 2 years of follow-up. Setting. Single-center clinical trial. Methods. Fifty-two eyes of 38 patients were enrolled in the study. One year follow-up was available for 47 eyes of 35 patients and 2 year follow-up for 39 eyes of 27 patients. Eyes were divided into 2 groups based on the level of preoperative myopia: Group 1, moderate to high myopia less than or equal to 15.0 diopters (D) (range -7.0 to -15.0 D, n = 24); Group 2, extreme myopia > 15.0 D (range -15.3 to -25.8 D, n = 15). Laser in situ keratomileusis was performed using the Chiron Automated Corneal Shaper (R) microkeratome and the Summit OmniMed excimer laser. Manifest spherical equivalent, mean central keratometry, and central corneal thickness (CCT) were measured preoperatively and 12 and 24 months postoperatively. Results: Group 1 exhibited a mild myopic shift (mean -0.07 +/- 0.28 D; P > .2) and a mild increase in keratometry (mean 0.05 +/- 0.46 D; P > .6), with an accompanying increase in CCT (mean 7.5 +/- 12.2 mum; (P = .006) at 24 months, Group 2 displayed a significant myopic shift (mean -0.7 +/- 0.7 D; P = .001) and a significant increase in keratometry (mean 0.4 +/- 0.5 D; P = .01), with a mild increase in CCT (mean 2.4 +/- 9.7 mum; P = .35) at 24 months. Corneal ectasia was evident in 1 eye in the extreme myopia group. Conclusion: The refractive effect of myopic LASIK up to -15.0 D remained reasonably stable during the second postoperative year. Significant regression of the refractive effect occurred in eyes with higher levels of myopia (> 15.0 D), with the risk of progressive ectasia. Extreme caution is recommended when myopic LASIK is performed in eyes with higher levels of myopia. (C) 2001 ASCRS and ESCRS MH - Mexico|Baja California MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 30 U4 - Ophthalmology;Surgery U5 - J;Article AV - English IS - 0886-3350 UR - ISI:000170272000020 L2 - PHOTOREFRACTIVE KERATECTOMY; IN-SITU; EXCIMER-LASER; DIOPTERS; REGRESSION SO - Journal of Cataract and Refractive Surgery 2001 ;27(7):1007-1012 3535 UI - 12775 AU - Magallon-Gastelum E AU - Lozano-Kasten F AU - Flores-Perez A AU - Bosseno MF AU - Breniere SF AD - Univ Guadalajara, Ctr Univ Ciencias Salud, Guadalajara 44430, Jalisco, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoIRD, UR 008, F-34032 Montpellier, FranceMagallon-Gastelum, E, Univ Guadalajara, Ctr Univ Ciencias Salud, AP 2-136, Guadalajara 44430, Jalisco, Mexico TI - Sylvatic triatominae of the Phyllosoma complex (Hemiptera : reduviidae) around the community of Carrillo Puerto, Nayarit, Mexico AB - Research on domestic and sylvatic triatomines within the community of Carrillo Puerto and neighboring areas of Nayarit, Mexico, documented that Triatoma longipennis (Usinger) and Triatoma picturata (Usinger) were infected with Trypanosoma cruzi (L.) in both habitats. T picturata was the predominant species in both habitats. Mouse baited-traps increased the effectiveness of collecting sylvatic triatomines, which were difficult to sample by inspecting habitats such as burrows, caves, and cliffs. The colonization of sylvatic and peridomestic habitats by Triatoma, the occurrence of high rates of infection with T. cruzi and the possibility that bugs move between habitats may require modification of current control strategies in Mexico MH - France MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000171279100006 L2 - Triatoma longipennis;Triatoma picturata;sylvatic cycle;domestic cycle;Mexico;CHAGAS-DISEASE; INFESTANS; VARIABILITY; DNA SO - Journal of Medical Entomology 2001 ;38(5):638-640 3536 UI - 13934 AU - Maghrabi M AU - Townsend PD AU - Vazquez G AD - Univ Sussex, CPES, Brighton BN1 9QH, E Sussex, EnglandUniv Sussex, EIT, Brighton BN1 9QH, E Sussex, EnglandCtr Invest Opt, Guanajuato 37150, MexicoMaghrabi, M, Univ Sussex, CPES, Brighton BN1 9QH, E Sussex, England TI - Low temperature luminescence from the near surface region of Nd : YAG AB - Luminescence offers a sensitive probe of the quality of Nd:YAG laser material both in the bulk and, via cathodoluminescence, in the near surface layers. The spectral signals are primarily from the Nd dopants, but the thermoluminescence spectra reveal traces of impurities such as Tb, Cr and Mn. Control of the electron energy of the cathodoluminescence demonstrates that the outer few micron layers differ significantly in luminescence response from the bulk crystal. The cathodoluminescence signals are influenced by near surface dislocations and solvents from cleaning treatments. The effects are often apparent as discontinuities in the Nd signal intensities at temperatures which match the solid-liquid or liquid-gas phase transitions of contaminants. Additionally there is strong evidence for the inclusion of carbon dioxide, in the form of nanoparticles. At 202 K, the CO2 sublimation temperature, the Nd line intensities change discretely and there are wavelength shifts for some of the emission lines consistent with pressure driven changes in the lattice parameter. Data for x-ray lattice parameters identify a complex acid sudden change and expansion of the lattice in this temperature region. The luminescence methods used suggest identification of impurities and gaseous inclusions can be exploited in other insulator materials and examples are cited MH - United Kingdom MH - Mexico|Guanajuato PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000167995600015 L2 - CRYSTALS SO - Journal of Physics-Condensed Matter 2001 ;13(11):2497-2515 3537 UI - 13673 AU - Maity SK AU - Rana MS AU - Bej SK AU - Ancheyta J AU - Dhar GM AU - Rao TSRP AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIndian Inst Petr, Dehra Dun 245008, Uttar Pradesh, IndiaUniv Saskatchewan, Catalysis & Chem React Engn Lab, Saskatoon, SK S7N 5C9, CanadaMaity, SK, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - TiO2-ZrO2 mixed oxide as a support for hydrotreating catalyst AB - Pure TiO2, ZrO2 and TiO2-ZrO2 mixed oxides are prepared by urea hydrolysis. Hydrotreating catalysts containing 12 wt% molybdenum are prepared using these oxides and characterized by BET surface area, pore volume, XRD and oxygen chemisorption. It is observed that oxides produced by the method of urea hydrolysis have higher surface area as compared to those available commercially. With increasing zirconia content in the mixed oxide, the surface area increases and a maximum value is obtained for a mixed oxide having Ti and Zr molar ratio of 65/35. XRD results indicate that mixed oxides are poorly crystalline in nature. Thiophene hydrodesulfurization, cyclohexene hydrogenation and tetrahydrofuran hydrodeoxygenation are taken as model reactions for evaluating catalytic activities. It is found that both O-2 uptake and catalytic activities increase with increasing zirconia content in mixed oxide and reach maximum values for the 12 wt% Mo/TiO2-ZrO2 (65/35) catalyst. With further increases in zirconia content, O-2 uptake and catalytic activities decrease and the lowest values are observed for the pure ZrO2 supported catalyst MH - Canada MH - India MH - Mexico|Distrito Federal PB - BUSSUM: BALTZER SCI PUBL BV RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000168848200019 L2 - molybdenum;TiO2-ZrO2;XRD;O-2 chemisorption;HDS;HYD;HDO;SURFACE-PROPERTIES; HYDRODESULFURIZATION; DEHYDROGENATION; ETHYLBENZENE; TITANIA SO - Catalysis Letters 2001 ;72(1-2):115-119 3538 UI - 14577 AU - Maity SK AU - Rana MS AU - Bej SK AU - Ancheyta J AU - Dhar GM AU - Rao TSRP AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIndian Inst Petr, Dehra Dun 245008, Uttar Pradesh, IndiaUniv Saskatchewan, Catalysis & Chem React Engn Lab, Saskatoon, SK S7N 5C9, CanadaAncheyta, J, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Studies on physico-chemical characterization and catalysis on high surface area titania supported molybdenum hydrotreating catalysts AB - A series of titania supported molybdenum catalysts were prepared by incipient wetness impregnation method and characterized by BET surface area, XRD, TPR, FTIR, ESCA, and low temperature oxygen chemisorption. Thiophene. cyclohexene and tetrahydrofuran were taken as model compounds for evaluating catalytic activities for hydrodesulfurization (HDS), hydrogenation (HYD), and hydrodeoxygenation (HDO) reactions, respectively. XRD results indicate that molybdenum oxide species are dispersed as a monolayer on the support up to 8 wt.% Mo and the formation of crystalline MoO3 is observed above this loading. FTIR and TPR results showed that molybdenum oxide species were present predominantly in tetrahedral form at lower loading and polymeric octahedral forms are dominant at higher loading. Both oxygen chemisorption and rates of reaction were found to increase with increasing Mo loading up to 8 wt.% and then decrease with further increase in loading. HDS and HYD activities are more or less same but HDO activity is two times higher than HDS and HYD activities. The results are also interpreted with the help of other parameters, like dispersion, equivalent molybdenum surface area, surface coverage, crystalline size, quasi-turnover frequencies and intrinsic activities. ESCA results suggest that electron transfer is taking place from support to metal. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 45 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000166181600022 L2 - TiO2;molybdena;O-2 chemisorption;TPR;FTIR;ESCA;HDS;HYD;HDO;HYDRODESULFURIZATION ACTIVITY; SULFIDED MOLYBDENUM; SPECTROSCOPY; FUNCTIONALITIES; CHEMISORPTION; DISPERSION; COBALT; OXYGEN SO - Applied Catalysis A-General 2001 ;205(1-2):215-225 3539 UI - 13657 AU - Maji A AU - Orozco A AU - Acree R AD - Univ New Mexico, Albuquerque, NM 87131, USAUniv Autonoma Chihuahua, Fac Civil Engn, Chihuahua, Mexico, USAF, Res Lab, VSSE, Albuquerque, NM 87117 USAMaji, A, Univ New Mexico, Albuquerque, NM 87131, USA TI - Fracture analysis of FRP reinforced concrete beams AB - Carbon/epoxy FRP (Fiber Reinforced Plastic) rebars were produced with the pultrusion technique. Concrete beams reinforced with these rebars were subjected to static and cyclic 3-point bending. Flexural cracking is arrested by an adequate bond between the FRP and the concrete because of the use of a carbon fiber overwrap on the otherwise smooth pultruded rods. In spite of the brittle nature of the FRP rods and the concrete, their combined behavior demonstrate ductility in excess of what is typically expected from reinforced concrete. An analytical evaluation of the fracture energy shows that such ductility is due to the large fraction of the total strain energy that is consumed in the formation of distributed cracking in concrete. Therefore, if an adequate bond can be provided, the strain-to-failure of the FRP determines the ductility and failure mode of FRP reinforced beams MH - Mexico|Chihuahua MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 0733-9399 UR - ISI:000168841400011 SO - Journal of Engineering Mechanics-Asce 2001 ;127(6):620-624 3540 UI - 12110 AU - Makarov NM AU - Tarasov YV AD - Univ Autonoma Puebla, Inst Ciencias, Puebla 72050, MexicoNASU, Inst Radiophys & Elect, UA-61085 Kharkov, UkraineMakarov, NM, Univ Autonoma Puebla, Inst Ciencias, Priv 17 Norte No 3417,Col San Miguel Hueyotlipan, Puebla 72050, Mexico TI - Electron localization in narrow surface-corrugated conducting channels: Manifestation of competing scattering mechanisms AB - Transport properties of narrow two-dimensional conducting wires in which the electron scattering is caused by side edges roughness have been studied. A method for calculating dynamic characteristics of such conductors is proposed which is based on a two-scale representation of the mode wave functions at weak scattering. With this method, fundamentally different by-height and by-slope scattering mechanisms associated with edge roughness are discriminated. The results for single-mode systems, previously obtained by conventional methods, are proven to correspond to the former mechanism only. Yet the commonly ignored by-slope scattering is more likely dominant. The electron extinction lengths relevant to this scattering differ substantially in functional structure from those pertinent to the by-height scattering. The transmittance of ultraquantum wires is calculated over all range of scattering parameters, from ballistic to localized transport of quasiparticles. The obtained dependence of scattering lengths on the disorder parameters is qualitatively valid for an arbitrary intercorrelation of the boundaries' defects MH - Mexico|Puebla MH - Ukraine PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000172867900090 L2 - DISORDERED WAVE-GUIDES; ROUGH BOUNDARIES; THIN-FILMS; TRANSPORT; FLUCTUATIONS; SYSTEMS SO - Physical Review B 2001 ;64(23): 3541 UI - 12223 AU - Makra K AU - Raptakis D AU - Chavez-Garcia FJ AU - Pitilakis K AD - Aristotelian Univ Thessaloniki, Dept Civil Engn, GR-54006 Thessaloniki, GreeceUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoMakra, K, Aristotelian Univ Thessaloniki, Dept Civil Engn, POB 450, GR-54006 Thessaloniki, Greece TI - Site effects and design provisions: The case of Euroseistest AB - Modern seismic codes usually include provisions for site effects by considering different coefficients chosen on the basis of soil properties at the surface and an estimate of the depth of bedrock. However, complex local geology may generate site amplification on soft soils significantly larger than what would be expected if we assume that the subsoil consists of plane soil layers overlaying a homogeneous half-space. This paper takes advantage of the large number of previous studies of site effects done at Euroseistest (northern Greece). Those studies have supplied a very detailed knowledge of the geometry and properties of the materials filling this shallow valley. In this paper we discuss the differences between site effects evaluated at the surface using simple 1-D computations and those evaluated using a very detailed 2-D model of the subsoil structure. The 2-D model produces an additional amplification in response spectra that cannot be accounted for without reference to them lateral heterogeneity of the valley structure, Our numerical results are extensively compared with observations, which show,that the additional amplification computed from the 2-D model is real and affects by a significant factor response spectra, and thus suggests that some kind of aggravation factor due to the complexity of local geology is worthy of consideration in microzonation studies and seismic codes MH - Greece MH - Mexico|Distrito Federal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 12 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0033-4553 UR - ISI:000172568700005 L2 - 1-D and 2-D modeling;observations;response spectra;aggravation factor;seismic codes;microzonation studies;SEDIMENT-FILLED VALLEYS; SEISMIC RESPONSE; DIFFERENTIAL MOTION; EURO-SEISTEST; SH-WAVES; AMPLIFICATION; RESONANCE SO - Pure and Applied Geophysics 2001 ;158(12):2349-2367 3542 UI - 14224 AU - Malacara-Doblado D AU - Dorrio BV AD - Ctr Invest Opt AC, Guanajuato 37000, MexicoUniv Vigo, Dept Fis Aplicada, E-36200 Vigo, Galicia, SpainMalacara-Doblado, D, Ctr Invest Opt AC, Apartado Postal 1-948, Guanajuato 37000, Mexico TI - Family of detuning-insensitive phase-shifting algorithms (vol 17, pg 1857, 2000) MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Correction AV - English IS - 0740-3232 UR - ISI:000167156100030 SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2001 ;18(3):721-721 3543 UI - 12140 AU - Maldonado L AU - Veleva L AU - Quintana P AU - de Rincon OT AU - Rincon A AU - Corvo F AU - Haces C AD - Inst Nacl Invest Nucl, Salazar 52045, Edo De Mexico, MexicoCtr Res & Adv Studies, Unidad Merida Antigua, Merida 97310, Yucatan, MexicoUniv Zulia, Corros Res Ctr, Maracaibo 4011, VenezuelaCNIC, Corros Dept, Havana, CubaMaldonado, L, Inst Nacl Invest Nucl, Km 36-5,Carr Mex Toluca, Salazar 52045, Edo De Mexico, Mexico TI - Electrochemical, gravimetric and x-ray characterization of low carbon steel corrosion rate and products after atmospheric exposure in the caribbean area AB - Rust scales of commercially available low carbon steels from Venezuela (AISI 1010), Mexico and Cuba (AISI 1019) were characterised after exposure at two typical atmospheres in the Caribbean region: Merida (rural-urban; RU) and Progreso (marine-coastal; MC). Low carbon steel surfaces rusting in those atmospheres formed mainly the oxyhydroxides lepidocrocite (gamma -FeOOH), goethite (alpha -FeOOH) and akaganeite (beta -FeOOH). Different amounts of lepidocrocite, goethite and akaganeite and the oxide phases hematite (alpha -Fe2O3), magnetite (Fe3O4) and maghemite (gamma -Fe2O4) were found, depending on the deposition rates value of air-borne salinity, time-of-wetness (TOW) and temperature present in every particular test site. The rust scale composition and air pollution are used to explain the corrosion rates and corrosion behaviour of the exposed low carbon steels in the tests sites MH - Cuba MH - Mexico|Estado De Mexico MH - Mexico|Yucatan MH - Venezuela PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 0 U4 - Electrochemistry;Metallurgy & Metallurgical Engineering;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0334-6005 UR - ISI:000172893300003 L2 - YUCATAN PENINSULA; MEXICO SO - Corrosion Reviews 2001 ;19(5-6):435-451 3544 UI - 14180 AU - Malo BM AU - Pizio O AU - Patrykiejew A AU - Sokolowski S AD - UNAM, Inst Fis, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandMalo, BM, UNAM, Inst Fis, Coyoacan, Mexico City 04510, DF, Mexico TI - Adsorption and phase transitions in a two-site associating Lennard-Jones fluid confined to energetically heterogeneous slit-like pores; application of the density functional method AB - A density functional approach is used to study adsorption and phase behaviour of the two-bonding-site associating Lennard-Jones (LJ) fluid in slit-like pores with energetically heterogeneous walls. Phase behaviour of strongly and weakly associating, polymerizing fluid in the pores with a periodic surface potential, characterized by different strengths and the spacings between adjacent minima, as well as different pore widths is discussed. A comparison of the results obtained for strongly and weakly associating fluids elucidates the role of bonding between fluid species in the pore-filling mechanism. An interplay between layering transitions, the formation of an intermediate 'bridge' phase and the final capillary condensation in the pores with energetically corrugated walls is discussed in detail MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000167308400005 L2 - SOLID-SURFACES; BONDING SITES; BEHAVIOR; NANOPORE; FILMS SO - Journal of Physics-Condensed Matter 2001 ;13(7):1361-1379 3545 UI - 12940 AU - Mamun A AU - Schennach R AU - Parga JR AU - Mollah MYA AU - Hossain MA AU - Cocke DL AD - Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710, USATexas A&M Univ, Dept Phys, College Stn, TX 77840, USAInst Tech Saltillo, Saltillo, Coahuila, MexicoUniv Dhaka, Dept Chem, Dhaka 1000, BangladeshCocke, DL, Lamar Univ, Gill Chair Chem & Chem Engn, POB 10022, Beaumont, TX 77710 USA TI - Passive film breakdown during anodic oxidation of zirconium in pH 8 buffer containing chloride and sulfate AB - Metal passivation and passive film breakdown in aqueous systems are complex processes. Zirconium passive films grown in basic solutions containing buffer, chloride and buffer; and chloride, sulfate and buffer have been examined with particular attention to the passive and transpassive regions using cyclic voltammetry (CV). Mechanically polished zirconium electrodes have been oxidized anodically in pH 8 buffer solutions containing 0.021 M chloride, with varying sulfate concentration. The CV curves show that zirconium forms passive layers under these conditions, which are more stable with increasing sulfate concentration. A model is proposed to explain the passive to transpassive transition taking oxygen evolution, crystallization and ohmic behavior into account. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Bangladesh MH - Mexico|Coahuila MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000170850900001 L2 - cyclic voltammetry;zirconium;chloride;sulfate;transpassive region;RAY PHOTOELECTRON-SPECTROSCOPY; OXIDE-FILMS; DISSOLUTION BEHAVIOR; ELECTRICAL CHARACTERISTICS; ELECTROCHEMICAL-BEHAVIOR; CYCLIC VOLTAMMETRY; ELECTRONIC STATES; ACID; SPECTROMETRY; CORROSION SO - Electrochimica Acta 2001 ;46(22):3343-3350 3546 UI - 13701 AU - Mancha H AU - Mendoza G AU - Belmares S AU - Cisneros MM AU - Escalante JI AU - Lopez H AU - Mendez M AD - CINVESTAV, Saltillo, Coahuila, Mexico. Inst Tecnol, Saltillo 25280, Coahuila, Mexico. Univ Wisconsin, Dept Mat Engn, Milwaukee, WI 53201, USA TI - Phase evolution in Fe-Cr-Mn-Mo powders processed by mechanical alloying in N-2 atmosphere AB - Nanostructured Fe-18Cr-11Mn-5Mo-xN alloys were prepared by attrition milling of elemental powders under N-2 atmosphere for different times. It was found that the amount of nitrogen present in the powder mixture increased up to 1.6 wt% after 192 h. As-milled powders were encapsulated in quartz tubes and heat treated at 1173 and 1473 K to promote austenisation. Different phases were identified posterior to crystallization namely, ferrite, austenite and Cr2N, which occurred in different amounts depending on the nitrogen content and the heat-treatment temperature. No nitrogen desorption was perceptible after the crystallization annealing treatment. The results showed that it is feasible to obtain a fully austenitic structure by controlling the processing parameters MH - Mexico|Coahuila MH - USA T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBS10Q AV - English IS - 0255-5476 UR - ISI:000168667500031 L2 - annealing;attrition milling;nitrogen atmosphere;powder characterization SO - 2001 ;():189-194 3547 UI - 13443 AU - Mancilla T AU - Carrillo L AU - Rivera LSZ AU - Camacho CC AU - de Vos D AU - Kiss R AU - Darro F AU - Mahieu B AU - Tiekink ERT AU - Rahier H AU - Gielen M AU - Kemmer M AU - Biesemans M AU - Willem R AD - Univ Autonoma Metropol, Unidad Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoFree Univ Brussels, Fac Appl Sci & High Resolut NMR Ctr, Dept Gen & Organ Chem, B-1050 Brussels, BelgiumFree Univ Brussels, High Resolut NMR Ctr, B-1050 Brussels, BelgiumPCH Nederland, Pharmachem BV, Dept Med, NL-003 RN Haarlem, NetherlandsFree Univ Brussels, Fac Med, Lab Histopathol, B-1070 Brussels, BelgiumCtr Rech, Lab Lafon, F-94701 Maisons Alfort, FranceUniv Catholique Louvain, Unite CPMC, B-1348 Louvain, BelgiumUniv Adelaide, Dept Chem, Adelaide, SA 5005, AustraliaFree Univ Brussels, Fac Sci Appl, Dept Phys & Polymer Chem, B-1050 Brussels, BelgiumMancilla, T, Univ Autonoma Metropol, Unidad Xochimilco, Dept Sistemas Biol, Calzada Hueso 1100,Col Villa Quietud, Mexico City 04960, DF, Mexico TI - Di-n-butyltin(IV) derivatives of bis(carboxymethyl)benzylamines: synthesis, NMR and X-ray structure characterization and in vitro antitumour properties AB - Four di-n-butyltin(IV) derivatives of bis(carboxymethyl)benzylamines were synthesized and their structure characterized by H-1,C-13 and Sn-117/119 NMR, Mossbauer spectroscopy and mass spectrometry, The derivative substituted in the meta position by a methyl group has been further characterized by X-ray crystallography, This compound exhibits a distorted trigonal bipyramidal geometry at tin. The NMR data in solution, as well as other spectroscopic results in the solid state, confirm this structure for all the compounds. Evidence is provided to show that the compounds are more highly associated in concentrated solution than in the solid state. Their in vitro antitumour activity is reported. Copyright (C) 2001 John Wiley & Sons, Ltd MH - Australia MH - Belgium MH - France MH - Mexico|Distrito Federal MH - Netherlands PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Applied;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0268-2605 UR - ISI:000169432000003 L2 - butyltin;benzylamines;structure;NMR;Mossbauer;mass spectroscopy;COLORIMETRIC ASSAY; CELL-LINES; COMPLEXES; ACIDS; PROLIFERATION; CRYSTAL; INVITRO; GROWTH; DRUGS SO - Applied Organometallic Chemistry 2001 ;15(7):593-603 3548 UI - 13354 AU - Mandelis A AU - Rodriguez ME AU - Raskin Y AU - Gorodokin V AD - Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON M5S 3G8, CanadaSIZARY Ltd, IL-24959 Migdal Tefen, IsraelInst Politecn Nacl, Unidad Queretaro, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro, MexicoMandelis, A, Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, 100 Coll St, Toronto, ON M5S 3G8, Canada TI - Laser infrared photothermal radiometric and ELYMAT characterizations of p-Si wafers annealed in the presence of an external electric field AB - Laser infrared photothermal radiometry (PTR) was used as an analytical technique to measure the electronic transport parameters of p-Si wafers oxidized and thermally annealed under positive or negative external bias applied to the back surface. It was found that, following Fe contamination and recombination lifetime tau (e), degradation in the oxidation and thermal-anneal furnace, both polarities of the external field result in significant minority carrier lifetime improvement, as well as in strong changes in the front-surface recombination velocity S-1, of the samples, compared to a zero-bias annealed reference sample. A qualitative model involving the passivating action of positive mobile ions (protons) trapped at the oxide-Si interface was advanced to explain the relative relations S-1((+)) > S-1((0)) > S-1((-)). The lifetime relations tau ((+))(e) > tau ((-))(e) > tau ((0))(e) obtained through both PTR and electrolytical metal tracer (ELYMAT) measurements were explained in terms of the relative abilities of positive and negative applied electric fields to prevent heavy metal ions from diffusing into the Si bulk and compromising the lifetime MH - Canada MH - Israel MH - Mexico|Queretaro PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000169706100029 L2 - SILICON; RECOMBINATION SO - Physica Status Solidi A-Applied Research 2001 ;185(2):471-478 3549 UI - 13739 AU - Mandelis A AU - Rodriguez ME AU - Garcia JA AU - Gorodokin V AU - Raskin Y AD - Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON M5S 3G8, CanadaSizary Ltd, IL-24959 Migdal Tefen, IsraelIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro, MexicoMandelis, A, Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, 5 Kings Coll Rd, Toronto, ON M5S 3G8, Canada TI - Minority carrier lifetime and iron concentration measurements on p-Si wafers by infrared photothermal radiometry and microwave photoconductance decay AB - A comparative study of electronic transport properties of p-Si wafers intentionally contaminated with Fe was performed using infrared photothermal radiometry (PTR) and microwave photoconductance decay (mu -PCD). Strong correlations were found between PTR and mu -PCD lifetimes in a lightly contaminated wafer with no significant PTR transient behavior. The absolute PTR lifetime values were larger than the local averaged CI-PCD values, due to the different excitation wavelengths and probe depths. In a heavily contaminated wafer the mu -PCD and PTR lifetime correlation was poorer. PTR measurements were highly sensitive to Iron concentration, most likely due to the dependence of the bulk recombination lifetime on it. Rapid-scanned (non-steady-state) PTR images of the wafer surface exhibited strong correlations with both mu -PCD lifetime and Iron concentration images in both heavily and lightly contaminated wafers. For the lightly and uniformly contaminated wafer, PTR scanning imaging was found to be more sensitive to iron concentration and lifetime variations than mu -PCD images MH - Canada MH - Israel MH - Mexico|Queretaro PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200077 L2 - SEMICONDUCTORS; SILICON; CRYSTALS; KINETICS SO - Analytical Sciences 2001 ;17():S265-S268 3550 UI - 14419 AU - Manko VS AU - Ruiz E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Salamanca, Area Fis Teor, E-37008 Salamanca, SpainManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Exact solution of the double-Kerr equilibrium problem AB - We present concise analytic expressions for the Komar masses and angular momenta of the balancing Kerr-NUT constituents in the double-Kerr solution which complement the equilibrium formulae previously obtained (Manko V S, Ruiz E and Sanabria-Gomez J D 2000 Class. Quantum Grav. 17 3881). A rigorous proof of the non-existence of equilibrium states of two Kerr black holes with positive masses is given MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Letter AV - English IS - 0264-9381 UR - ISI:000166659500002 L2 - EQUATIONS; MASS SO - Classical and Quantum Gravity 2001 ;18(2):L11-L15 3551 UI - 13664 AU - Manning-Cela R AU - Cortes A AU - Gonzalez-Rey E AU - Van Voorhis WC AU - Swindle J AU - Gonzalez A AD - Infect Dis Res Inst, Seattle, WA 98104, USAUniv Washington, Dept Pathobiol, Seattle, WA 98195, USAUniv Washington, Dept Med, Seattle, WA 98195, USASeattle Biomed Res Inst, Seattle, WA 98109, USAIPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City, DF, MexicoCSIC, Inst Parasitol & Biomed, Granada, SpainSwindle, J, Infect Dis Res Inst, 1124 Columbia St,Suite 600, Seattle, WA 98104 USA TI - LYT1 protein is required for efficient in vitro infection by Trypanosoma cruzi AB - Trypanosoma cruzi invasion of host cells involves several discrete steps: attachment, parasite internalization mediated by recruitment and fusion of host cell lysosomes, and escape from the parasitophorous vacuole to liberate amastigotes to multiply freely in the cytosol. This report describes the initial characterization of the LYT1 gene and the demonstration that the gene product is involved in cell lysis and infectivity. Mutational analysis demonstrated that deletion of LYT1 resulted in attenuation of infection, which was associated with diminished hemolytic activity. Reintroduction of LYT1 restored infectivity in null mutants, confirming the critical role of LYT1 in infection. Additionally, in vitro stage transition experiments with LYT1-deficient lines showed that these parasites converted to extracellular amastigote-like cells and metacyclic trypomastigotes more rapidly than wild-type parasites, suggesting that the diminished infectivity was not a result of the LYT1 deficiency that affected the parasite's ability to complete the life cycle MH - Mexico|Distrito Federal MH - Spain MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000168784300051 L2 - HOST-CELL INVASION; GENE REPLACEMENTS; LOW PH; EXPRESSION; TRANSFORMATION; EPIMASTIGOTES; AMASTIGOTES; HEMOLYSIN; LYSOSOMES; SECRETION SO - Infection and Immunity 2001 ;69(6):3916-3923 3552 UI - 12675 AU - Manrique-Saide P AU - fin-Gonzalez H AU - Ibanez-Bernal S AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Dept Zool, Merida, Yucatan, VenezuelaInst Ecol, AC Dept Entomol, Xalapa 91000, Veracruz, MexicoManrique-Saide, P, Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Dept Zool, Apartado Postal 4-116 Itzimna, Merida, Yucatan, Venezuela TI - Horseflies (Diptera : Tabanidae) from protected areas of the Yucatan Peninsula, Mexico AB - Examination of horseflies deposited in the Coleccion Entomologica Regional of Universidad Autonoma de Yuca Merida, Yucatan, Mexico (CER-UADY) and Instituto Nacional de Diagnostico y Referencia Epidemiologicos, Mexico City, Mexico (INDRE) collections revealed a significant number of species and new localities from the Peninsula of Yucatan (PY). Previously published information is summarized, and new information about tabanid species reported for PY is presented, with emphasis on the most important protected areas within the biotic province of Yucatan: Celestun, Cuxtal, Dzilam and Ria Lagartos (Yucatan), Calakmul (Campeche), Sian Ka'an and El Eden (Quintana-Roo). Over 5,000 specimens collected by netting, human bait, Malaise traps and light traps were examined, A final list of 29 species, 17 representing state records and three representing PY records, is provided. One species is also reported for the first time from Mexico. Species diversity by state is as follows: Campeche, 19 species, 10 new state records; Quintana Roo, 23 species, 2 new state records; Yucatan, 22 species, 9 new state records. The 29 species reported for the biotic province of Yucatan represents more than 14% of the species known from Mexico. Most of these species have Neotropical or amphitropical affinities. Species showed wide distribution ranges within the biotic province of Yucatan, probably related to climatic and orographic homogeneity, which define the limits of the province MH - Mexico|Veracruz MH - Venezuela PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000171455700004 L2 - Tabanidae;Peninsula of Yucatan;Mexico SO - Florida Entomologist 2001 ;84(3):352-362 3553 UI - 12237 AU - Mansilla R AD - Natl Autonomous Univ Mexico, Ctr Interdisciplinary Res Sci & Humanities, Mexico City 04510, DF, MexicoUniv Havana, Fac Math & Comp Sci, Havana, CubaMansilla, R, Ctr Invest Interdisciplinaries, Ciudad Univ,Torre 2 Humanidades,4to Piso, Mexico City 04510, DF, Mexico TI - Algorithmic complexity of real financial markets AB - A new approach to the understanding of complex behavior of financial markets index using tools from thermodynamics and statistical physics is developed. Physical complexity, a quantity rooted in the Kolmogorov-Chaitin theory is applied to binary sequences built up from real time series of financial markets indexes. The study is based on NASDAQ and Mexican IPC data. Different behaviors of this quantity are shown when applied to the intervals of series placed before crashes and to intervals when no financial turbulence is observed. The connection between our results and the efficient market hypothesis is discussed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000172594500038 L2 - financial markets;physical complexity;Kolmogorov-Chaitin theory;MINORITY GAME SO - Physica A-Statistical Mechanics and Its Applications 2001 ;301(1-4):483-492 3554 UI - 13332 AU - Manske GGB AU - Ortiz-Monasterio JI AU - van Ginkel M AU - Gonzalez RM AU - Fischer RA AU - Rajaram S AU - Vlek PLG AD - Univ Bonn, Ctr Dev Res ZEF, D-53113 Bonn, GermanyCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoInst Nacl Invest Forestales Agricolas & Pecuarias, Morelia, Michoacan, MexicoAustralian Ctr Int Agr Res, Canberra, ACT 2601, AustraliaManske, GGB, Univ Bonn, Ctr Dev Res ZEF, Walter Flex Str 3, D-53113 Bonn, Germany TI - Importance of P uptake efficiency versus P utilization for wheat yield in acid and calcareous soils in Mexico AB - There are large agricultural areas in the world where wheat yields are limited by low phosphorus (P) availability. Breeding for P uptake and P utilization efficiency may reduce this problem. This study was conducted to determine the contribution of P uptake and utilization efficiency to grain yield of selected spring wheat genotypes in different environments. Thirty-eight semidwarf spring bread wheat (Triticum aestivum) genotypes were grown in two experiments in Mexico, each on an acid Andisol under rainfed conditions and on a calcareous Aridisol with irrigation, without (- P) and with 35 kg P per ha fertilized (+ P). Without P fertilization, grain yield ranged from 0.8 to 4.6 t ha(-1) in the acid soil and from 2.3 to 5.2 t ha(-1) in the calcareous soil. With P fertilization, this range was even larger. Under conditions of P deficiency, i.e. in the acid soil at - P and (P thigh P adsorption) and calcareous soil at - P (P-depleted soil), P uptake explained 71-100% of the variation in grain yield, and was highly correlated with grain yield (r = 0.79-0.95). In contrast, at + P in the calcareous soil, P utilization efficiency explained 60-63% of the variation in grain yield. Here, low grain P concentration was related to high grain yield (r = - 0.40 to - 0.59). In the calcareous soil, the harvest index was correlated with grain yield, irrespective of the P level. In the acid soil, post-anthesis P accumulation was important. It was positively correlated with grain yield, whereas in the calcareous soil, no post-anthesis-P accumulation occurred. Here, grain P accumulation at maturity was completely determined by translocation of pre-anthesis shoot P. We conclude that the combination of improved P uptake and P utilization efficiency in the same genotypes requires selection under both high and low-P conditions. (C) 2001 Elsevier Science B.V. All rights reserved MH - Australia MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 1161-0301 UR - ISI:000169791900002 L2 - phosphorus use efficiency;Triticum aestivum;P uptake;P utilization;wheat;PHOSPHORUS EFFICIENCY; GRAIN NITROGEN; GROWTH-STAGES; WINTER-WHEAT; GENOTYPES; SELECTION; MATTER; CROPS SO - European Journal of Agronomy 2001 ;14(4):261-274 3555 UI - 12139 AU - Manson RH AU - Ostfeld RS AU - Canham CD AD - Inst Ecol AC, Xalapa 91070, Veracruz, MexicoInst Ecosyst Studies, Millbrook, NY 12545, USAManson, RH, Inst Ecol AC, Km 2-5 Antigua Carretera Coatepec 351,Congregac, Xalapa 91070, Veracruz, Mexico TI - Long-term effects of rodent herbivores on tree invasion dynamics along forest-field edges AB - Despite many observations of herbivores and granivores influencing the survival of tree seeds and seedlings, the net effects of these consumers on plant succession remain unclear. We used both experimental herbivore manipulations and observations of changes in vegetation cover to evaluate the longer-term impacts of small-mammal herbivores and granivores on woody plant invasion into old fields in New York State. Over a 5-yr period, we manipulated the density of meadow voles (Microtus pennsylvanicus) within partial enclosures replicated at five study sites. Average vole activity in enclosures with high vole density was significantly greater than that in enclosures with low vole density. In contrast, activity of competitively inferior white-footed mice (Peromyscus leucopus) was significantly greater within enclosures designated as low vole density. Colonization by tree seedlings, as well as shrubs and vines. was significantly greater in enclosures under the low vole density treatment. Further, tree seedling abundance was higher in shrub-dominated enclosures with low vole, but high mouse, activity. Five years of contrasting mouse and vole activity within adjacent enclosures revealed that seedling predation by voles had a greater net effect on changes in woody vegetation cover in old fields than did seed predation by mice, despite studies reporting higher rates of seed vs. seedling predation in these areas. We conclude that short-term measures of predation intensity may not accurately predict the longer-term effects of small-mammal herbivores on vegetation dynamics and suggest that voles may be a keystone herbivore in old-field succession MH - Mexico|Veracruz MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 33 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000172791800005 L2 - granivory;herbivory;keystone species;Microtus pennsylvanicus;New York State;old-field succession;Peromyscus leucopus;plant-herbivore interactions;rodents;seed vs. seedling predation;seedling establishment;tree invasion;OLD-FIELDS; SEED PREDATION; OLDFIELD SUCCESSION; PLANT SUCCESSION; NEW-YORK; ESTABLISHMENT; SURVIVAL; PATTERNS; DENSITY; MECHANISMS SO - Ecology 2001 ;82(12):3320-3329 3556 UI - 13280 AU - Manton WI AU - Rothenberg SJ AU - Manalo M AD - Univ Texas Dallas, Dept Geol, Richardson, TX 75083, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoManton, WI, Univ Texas Dallas, Dept Geol, Mail Drop FO21,POB 830688, Richardson, TX 75083 USA TI - The lead content of blood serum AB - Serum lead concentrations measured by stable isotope dilution with a thermal ionization mass spectrometer and blood lead concentrations measured by graphite furnace atomic absorption spectrophotometry are reported for 73 women of child bearing age resident in Los Angeles, California, The two quantities are related by the line y = 0.00030 + 0.00241x (r = 0.83), where y is serum lead concentration and x is blood lead concentration, both being expressed in units of mug/L. The linearity of the relationship appears to hold to a blood lead concentration of at least 60 mu gPb/L. The slope of the line indicates that lead in serum is 0.24% of that in whole blood in contrast to recent reports of between 0.32 and 0.35% determined by inductively coupled plasma (ICP) mass spectrometry with bismuth used as an internal standard. The discrepancy stems from the ICP mass spectrometer-generated curves not passing through the origin. (C) 2001 Academic Press MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 13 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000169947200007 L2 - plasma lead;serum lead;mass spectrometry;isotope dilution;STABLE-ISOTOPE-DILUTION; CENTRAL LOS-ANGELES; CIRCULATING LEAD; EXTERNAL SOURCES; WHOLE-BLOOD; RED-CELLS; PLASMA; PREGNANCY; BONE; PARTITION SO - Environmental Research 2001 ;86(3):263-273 3557 UI - 13315 AU - Mantooth SJ AU - Milazzo ML AU - Bradley RD AU - Hice CL AU - Ceballos G AU - Tesh RB AU - Fulhorst CF AD - Univ Texas, Med Branch, Dept Pathol, Galveston, TX 77555, USAUniv Texas, Med Branch, Ctr Trop Dis, Galveston, TX 77555, USATexas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoFulhorst, CF, Univ Texas, Med Branch, Dept Pathol, Galveston, TX 77555 USA TI - Geographical distribution of rodent-associated hantaviruses in Texas AB - The purpose of this study was to increase our knowledge of the geographic distribution and natural host range of hantaviruses in Texas, southeastern New Mexico, and Mexico. Blood samples from 3,225 wild rodents, representing 34 species, were tested for hantavirus antibody (IgG), using an enzyme-linked immunosorbent assay. Hantavirus antibody was found in one or more rodents from each of 13 counties in Texas, Otero County in southeastern New Mexico, and Mexico State (central Mexico). The 133 antibody-positive rodents included seven Peromyscus species (P. attwateri, P. boylii, P. hylocetes, P. leucopus, P. maniculatis, P. melanotis, and P. pectoralis), Sigmodon hispidus, Oryzomys palustris, two Reithrodontomys species (R. fulvescens and R. megalotis), Neotoma albigula, and Perognathus merriami. This study provides further evidence that rodent-associated hantaviruses are geographically widely distributed in Texas. The discovery of antibody in P. hylocetes and P. melanotis is evidence that peromyscine rodents in Mexico are naturally associated with viruses belonging to the genus Hantavirus MH - Mexico|Distrito Federal MH - USA PB - SANTA ANA: SOC VECTOR ECOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 1081-1710 UR - ISI:000169791100002 L2 - hantavirus;Peromyscus;Texas;Mexico;UNITED-STATES; GENETIC IDENTIFICATION; PULMONARY SYNDROME; PEROMYSCUS-MANICULATUS; HEMORRHAGIC-FEVER; RENAL SYNDROME; NORTH-AMERICA; VIRUS; DIVERSITY; MICE SO - Journal of Vector Ecology 2001 ;26(1):7-14 3558 UI - 13978 AU - Maradudin AA AU - Simonsen I AU - Leskova TA AU - Mendez ER AD - Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USANorwegian Univ Sci & Technol, Dept Phys, N-7491 Trondheim, NorwayRussian Acad Sci, Inst Spect, Troitsk 142092, RussiaCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoMaradudin, AA, Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA TI - Localization of surface plasmon polaritons on a random surface AB - We study the possibility of the strong localization of surface plasmon polaritons propagating along a metal surface a finite part of which is randomly rough. The surface roughness is such that the roughness-induced conversion of a surface plasmon polariton propagating on it into volume electromagnetic waves in the vacuum above the surface is suppressed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Norway MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000167877900015 L2 - localization;surface plasmons;polaritons;random surfaces;LIGHT; WAVES; SCATTERING; BACKSCATTERING; MEDIA SO - Physica B-Condensed Matter 2001 ;296(1-3):85-97 3559 UI - 14447 AU - Marcilla A AU - Bargues MD AU - Ramsey JM AU - Magallon-Gastelum E AU - Salazar-Schettino PM AU - bad-Franch F AU - Dujardin JP AU - Schofield CJ AU - Mas-Coma S AD - Univ Valencia, Fac Farm, Dept Parasitol, E-46100 Valencia, SpainInst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoUniv Guadalajara, Ctr Univ Ciencias Salud, Dept Salud Publ, Guadalajara 44430, Jalisco, MexicoUNAM, Fac Med, Dept Microbiol & Parasitol, LAb Biol parasitos, Mexico City, DF, MexicoFdn Int Ciencias Sociales & SAlud, Inst Juan Cesar Garcia, Quito, EcuadorORSTOM, CNRS, UMR 9926, IRD, F-34032 Montpellier 1, FranceUniv London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1E 7HT, EnglandMarcilla, A, Univ Valencia, Fac Farm, Dept Parasitol, Av Vicente Andres Estelles S-N, E-46100 Valencia, Spain TI - The ITS-2 of the nuclear rDNA as a molecular marker for populations, species, and phylogenetic relationships in Triatominae (Hemiptera : Reduviidae), vectors of Chagas disease AB - The nucleotide sequences of the rDNA second internal transcribed spacer (ITS-S) of 31 populations of 12 and 3 species of the two main Triatominae tribes Triatomini and Rhodniini, including the most important Chagas disease vectors, were obtained, Sequence comparisons and parsimony, distance, and maximum-likelihood analyses indicate that ITS-S is a useful marker for resolving supraspecific, specific, subspecific, and even sometimes population-level relationships in Triatominae. Results were markedly different between species of Triatomini and Rhodniini, suggesting polyphyly. Phylogenetic trees support an old divergence between South American and North-Central American Triatomini and query the validity of some genera (Dipetalogaster, Psammolestes). The very low sequence variation between species of the phyllosoma complex suggests that subspecific ranking would be more appropriate. Triatoma dimidiata proves to be a clearly differentiated species, with several populations evidencing a clinal variation along a north-south axis and a population from Yucatan showing differences consistent with specific status. (C) 2001 Academic Press MH - Ecuador MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Morelos MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 38 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000166559300015 L2 - ribosomal DNA;ITS-2;Triatominae;Hemiptera;nucleotide sequence;phylogenetic analyses;SEQUENCE VARIATION; MITOCHONDRIAL-DNA; RECONSTRUCTION; SUBSTITUTIONS; LIMITS SO - Molecular Phylogenetics and Evolution 2001 ;18(1):136-142 3560 UI - 12085 AU - Marcus AI AU - Chen C AU - Hu Y AU - Calzada JPV AU - Grossniklauss U AU - Ma H AU - Cyr RJ AD - Penn State Univ, University Pk, PA 16802, USAUniv Penn, Dept Biol, Inst Plant Sci, Philadelphia, PA 19104, USAPenn State Univ, Life Sci Consortium, University Pk, PA 16802, USACold Spring Harbor Lab, Plant Biotechnol Unit, Cold Spring Harbor, NY 11724, USACINVESTAV Irapuato, Irapuato, MexicoUniv Zurich, Inst Plant Biotechnol, CH-8006 Zurich, SwitzerlandPenn State Univ, Dept Biol, University Pk, PA 16802, USA TI - The Arabidopsis kinesin, KATA, is a minus-end directed kinesin involved in male meiosis MH - Mexico|Guanajuato MH - Switzerland MH - USA PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000172372502396 SO - Molecular Biology of the Cell 2001 ;12():436A-436A 3561 UI - 12869 AU - Marczewska B AU - Bilski P AU - Budzanowski M AU - Olko P AU - Chernov V AD - Inst Nucl Phys, PL-31342 Krakow, PolandUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoMarczewska, B, Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland TI - Dosimetry properties of Tm-doped single CaF2 crystals AB - The dosimetry properties of thermoluminescence CaF2:Tm detectors with thulium concentrations of 0.1%, 0.3%, 0.5%, 0.6% and 0.7%, developed from single crystals grown by the Stockbarger method at the Institute of Geochemistry, Irkutsk, Russia, were investigated. The relative TL efficiency, eta, after 5.3 MeV Am-241 alpha -particle irradiation and the Cs-137 gamma -ray dose response after doses up to 10 Gy, of interest for radiation therapy, were evaluated. Linearity and reproducibility of the dose response, the shape of the glow-curve (ratio of area under peaks 3 and 5 for alpha- and gamma -radiation) were studied and referred to the properties of standard Harshaw TLD-300 detectors. The relative TL a-particle efficiency, eta, for the high temperature peak 5 was found to grow with increasing Tm concentration, from 0.13 for 0.1% Tm, 0.17 for 0.3% Tm to 0.92 for 0.5% Tm where the corresponding values of ty for peak 3 were 0.073, 0.059 and 0.211. Detectors with 0.6 wt% Tm appear to reproduce the properties of TLD-300 quite well, showing a similar shape of the glow curve and a similar ratio of peak areas under peaks 5 and 3. The highest ranges of linear dose-response for Cs-137 gamma -rays for peaks 3 and 5, were obtained for detectors with 0.5% Tm. These detectors, due to their high efficiency after high-LET irradiation and extended linearity range are most suitable for dosimetry of high-LET radiotherapy beams. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Sonora MH - Poland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000170916000021 L2 - TL detectors;dosimeter;CaF2 single crystals;radiation therapy;high-LET dosimetry;TLD-300; DETECTORS; ENERGY SO - Radiation Measurements 2001 ;33(5):571-576 3562 UI - 13743 AU - Marin E AU - Riech I AU - Diaz P AU - Vargas H AD - Univ Estadual Norte Fluminense, Ctr Ciencia & Tecnol, Lab Ciencias Fis, Campus Dos Goytacazes, RJ, BrazilIPN, CICATA, Mexico City 07738, DF, MexicoInst Politecn Nacl, CINVESTAV, Mexico City 07000, DF, MexicoUniv La Habana, Vedado 10400, La Habana, CubaMarin, E, Univ Estadual Norte Fluminense, Ctr Ciencia & Tecnol, Lab Ciencias Fis, Av Alberto Lamego 2000, Campus Dos Goytacazes, RJ, Brazil TI - On the surface characterization in semiconductor structures using the photoacoustic technique AB - Surface passivation is an extremely important step for high-performance semiconductor electronic devices, well characterized by the surface recombination velocity, S. In the last years great attention is devoted to the development of methods to reduce the value of this magnitude. In evaluating the advantages or drawbacks of a method with respect to another to improve the surface, it arises the problem of the estimation of S. In this work ne report about the application of the photoacoustic (PA) technique to the measurement of S at the interface between semiconductor substrates and epitaxial layers grown on their surfaces. We present theoretical models to the calculation of the PA signal for various cases of technological interest as well as experimental results obtained in the material systems SiN(H)/Si, AlGaAs/GaAs and GaInAsSb/GaSb. The obtained values for S were correlated with measurements performed by conventional methods such as PL and C-V. This work is a new step towards the better understanding of the generation of the PA signal in semiconductors and in demonstrating the possibilities of the PA technique to perform the characterization of semiconductor materials MH - Brazil MH - Cuba MH - Mexico|Distrito Federal PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200083 SO - Analytical Sciences 2001 ;17():S288-S290 3563 UI - 11271 AU - Marin LE AU - Sharpton VL AU - Fucugauchi JU AU - Smit J AU - Sikora P AU - Carney C AU - Rebolledo-Vieyra M AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoLunar & Planetary Inst, Houston, TX 77058, USAFree Univ Amsterdam, Dept Sedimentary Geol, NL-1081 HV Amsterdam, NetherlandsAmoco Prod Co, Houston, TX 77253, USAMarin, LE, Natl Autonomous Univ Mexico, Inst Geofis, Cd Univ, Mexico City 04510, DF, Mexico TI - Stratigraphy at ground zero: A contemporary evaluation of well data in the Chicxuluh impact basin AB - Evidence of "Upper Cretaceous" sediments above the melt rock/breccia assemblage at Chicxulub has been used to dispute the link between this large impact crater and the Cretaceous-Tertiary (M) extinction horizon. We have evaluated core samples and well logs from the Petroleos Mexicanos (Pemex) Yucatan No. 6 exploratory well located similar to50 km from ground zero. Despite previous reports to the contrary, the sequence of crystalline rocks and breccias located at depths exceeding 1000 in below sea level are characteristic of the upper lithological sequence observed at other large impact basins such as the 220 km Sudbury structure. Furthermore, the "Upper Cretaceous" sediments overlying the melt rocks and impact brecias at Chicxulub contain abundant glass shards and shocked minerals, demonstrating conclusively that these are reworked debris involved in the impact event, and not normal marine sediments. Core samples straddling the KT boundary indicate that the impact event created a basin several hundred meters deep MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 2 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000175319900006 L2 - CRETACEOUS-TERTIARY BOUNDARY; YUCATAN PENINSULA; MELT ROCKS; CRATER; MEXICO; AGES SO - International Geology Review 2001 ;43(12):1145-1149 3564 UI - 12572 AU - Marivaux L AU - Welcomme JL AU - Antoine PO AU - Metais G AU - Baloch IM AU - Benammi M AU - Chaimanee Y AU - Ducrocq S AU - Jaeger JJ AD - Univ Montpellier 2, CNRS, Inst Sci Evolut, Lab Paleontol,UMR 5554, F-34095 Montpellier 5, FranceUniv Balochistan, Dept Geol, Quetta, PakistanMuseum Natl Hist Nat, CNRS, Lab Paleontol, UMR 8569, F-75231 Paris, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo, Mexico City 04510, DF, MexicoDept Mineral Resources, Geol Survey Div, Paleontol Sect, Bangkok 10400, ThailandMarivaux, L, Univ Montpellier 2, CNRS, Inst Sci Evolut, Lab Paleontol,UMR 5554, CC064,Pl E Bataillon, F-34095 Montpellier 5, France TI - A fossil lemur from the Oligocene of Pakistan AB - In the absence of a comprehensive fossil record, the origin and early evolution of Malagasy lemurs have been subject to much uncertainty. We report here the discovery of a strepsirrhine fossil with strong cheirogaleid lemur affinities, Bugtilemur mathesoni gen. et sp. nov., from early Oligocene deposits of the Bugti Hills (Balochistan, Pakistan). Bugtilemur represents the earliest record of Lemuriformes, which hence appear to. have already diversified outside of Madagascar at least 30 million years ago. This fossil clearly enhances the critical role of the Indian subcontinent in the early diversification of lemurs and constrains paleobiogeographic models of strepsirrhine lemur evolution MH - France MH - Mexico|Distrito Federal MH - Pakistan MH - Thailand PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 35 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000171695600045 L2 - SINGLE-ORIGIN; PHYLOGENY; MADAGASCAR; PRIMATES; HYPOTHESIS; EVOLUTION; LORISES SO - Science 2001 ;294(5542):587-591 3565 UI - 12336 AU - Markaida U AU - Sosa-Nishizaki O AD - CICESE, Lab Ecol Pesquera, Dept Ecol, Ensenada, Baja California, MexicoMarkaida, U, CICESE, Ecola Marina, POB 434844, San Diego, CA, USA TI - Reproductive biology of jumbo squid Dosidicus gigas in the Gulf of California, 1995-1997 AB - A large-scale, artisanal fishery for jumbo squid (Dosidicus gigas) occurred in the central Gulf of California between 1995 and 1997, mainly off Santa Rosalia and Guaymas, two areas of alternate seasonal upwelling. The fishery was supported mainly by large individuals: females maturing at 750 mm ML and males maturing at two sizes, 530 and 670 mm ML, respectively. A medium-sized maturing group was also detected; 400 nun ML for females and 330 mm ML for males. The 77% of females (909 in total) were immature or maturing animals, while 77% of males (392 in total) were mature. The predominance of mature males relative to mature females suggests that the central Gulf of California is a feeding ground, although size selection by jig is difficult to assess. The alternate upwelling system could provide a food supply for the maturation of squid all year round. The reproductive season appears to spread throughout the year, with a small proportion of mature females and most of the males mature in most months. No spawning peaks could be detected, indicating that reproduction probably takes place outside the areas studied. The population size structure was similar for the three fishing seasons considered, indicating a similar use of the upwelling areas for feeding. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000172332600007 L2 - jumbo squid;Dosidicus gigas;reproductive biology;Gulf of California;SEXUAL-MATURATION; WATERS SO - Fisheries Research 2001 ;54(1):63-82 3566 UI - 11970 AU - Marquez-Rocha FJ AU - guilar-Juarez M AU - costa-Ruiz MJ AU - Gradilla MI AD - Ctr Sci Res & High Educ Ensenada, Dept Marine Biotechnol, Ensenada, Baja California, MexicoCtr Sci Res & High Educ Ensenada, Dept Aquaculture, Ensenada, Baja California, MexicoUNAM, Sci Ctr Condensed Matter, Ensenada, Baja California, MexicoMarquez-Rocha, FJ, Dept Marine Biotechnol CICESE, POB 434844, San Diego, CA 92143 USA TI - Rapid characterization of ultrafiltration membranes by scanning electron microscopy AB - Physicochemical properties of ultrafiltration membranes were studied by scanning electron microscopy. The membrane elemental composition (carbon, oxygen, and sulfur) was determined by energy dispersion analysis. The elements were shown to be homogeneously distributed along the membrane. A homogeneous pore distribution on the membrane surface was found after covering it with a thin gold layer. The pore sizes are similar to50 nm. The topographic analysis of the permeate-side of the membrane indicated its anisotropy MH - USA MH - Mexico|Baja California PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1066-5285 UR - ISI:000173332000038 L2 - ultrafiltration membranes;scanning electron microscopy;topographic analysis;elemental analysis SO - Russian Chemical Bulletin 2001 ;50(7):1320-1322 3567 UI - 13970 AU - Marquez-Rocha FJ AU - Hernandez-Rodri V AU - Lamela MT AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoMarquez-Rocha, FJ, CICESE, Dept Aquaculture, POB 434844, San Diego, CA 92143 USA TI - Biodegradation of diesel oil in soil by a microbial consortium AB - Biodegradation of diesel oil was performed using a diesel oil-degrading bacterial consortium, in both laboratory and pilot scale experiments. The bacterial consortium was prepared in liquid for laboratory tests and for pilot scale experiments, it was prepared in two steps, liquid and then in soil. The concentration of diesel in soil treated with the bacterial consortium was reduced to < 15% of the initial concentration, within a period of five weeks in both laboratory (135 to 19.32 g diesel kg (soil dry weight)(-1)) and pilot scale (118 to 17.5 g diesel kg (soil dry weight)(-1)) experiments, in comparison with controls (without bacterial consortium), in which initial concentration of diesel was reduced by only 5 and 15%, respectively. Diesel biodegradation rate with the bacterial consortium was 2.13 g diesel kg (soil dry weight)(-1) d(-1), it was slightly enhanced by the addition of NH4NO3 in the presence of bacterial consortium 2.78 g diesel kg (soil dry weight)(-1) d(-1). The enhancement of the microbial activity in hydrocarbon-contaminated soil can be achieved with the combination of stepwise soil inoculation and nutrient additions MH - USA MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 20 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000167945900008 L2 - bacterial consortium;biodegradation;diesel;inoculum;BIOREMEDIATION; POPULATIONS SO - Water Air and Soil Pollution 2001 ;128(3-4):313-320 3568 UI - 13253 AU - Marquez VE AU - Anacona JR AU - Barbarin CR AD - Univ Oriente, Dept Quim Aplicada, Cumana, VenezuelaUniv Oriente, Dept Quim, Cumana, VenezuelaUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, MexicoAnacona, JR, Univ Oriente, Dept Quim Aplicada, Apartado Postal 255, Cumana, Venezuela TI - Synthesis, molecular structure and electrochemistry of cobalt(II) complexes of 2,2 ': 6 ',2"-terpyridine macrocycles AB - The macrocycle L, prepared by template condensation of bis-6,6"-(alpha -methylhidrazino)-4'phenyl-2,2':6 "2'-terpyridine with glyoxal, forms a stable crystalline complex of cobalt(II) [Co(L)(H2O)(2)][PF6](2) which has been used as a starting material to prepare, for electrochemical studies, a series of seven coordinate cobalt(II) complexes [Co(L)X-2][PF6](2) (X = pyridine, 4-cianopyridine, 4-aminopyridine, 4-dimethylaminopyridine, pirazine, imidazole, 1-methylimidazole, 2-methylimidazole, and trimethylphosphite). Cyclic voltammetry of the aquo complex in DMSO show one reversible reduction wave at-1.35 V versus Ag \ AgBF4 reference electrode and controlled potential electrolysis in the presence of trimethylphosphite affords a diamagnetic species which has been assigned as a mononuclear d(8) Co(I) species. The crystal and molecular structure of [Co(L)(imidazole)(2)][PF6](2). Me2CO shows the metal to be in a pentagonal-bipyramidal N-7 environment. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000169986500015 L2 - cobalt(II) complexes;molecular structures;electrochemistry;2,2'-6',2''-TERPYRIDINE MACROCYCLES; COORDINATION CHEMISTRY; NICKEL(II) COMPLEXES; COPPER(I) COMPLEXES; ELECTRON-TRANSFER; OXIDATION-STATE; LIGAND; STABILIZATION; REDUCTION; CRYSTAL SO - Polyhedron 2001 ;20(15-16):1885-1890 3569 UI - 14508 AU - Marroqui S AU - Zorreguieta A AU - Santamaria C AU - Temprano F AU - Soberon M AU - Megias M AU - Downie JA AD - John Innes Ctr Plant Sci Res, Dept Genet, Norwich NR4 7UH, Norfolk, EnglandUniv Sevilla, Dept Microbiol & Parasitol, Seville, SpainCIFA Torres & Tomejil, Seville, SpainUNAM, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca, Morelos, MexicoDownie, JA, John Innes Ctr Plant Sci Res, Dept Genet, Colney Lane, Norwich NR4 7UH, Norfolk, England TI - Enhanced symbiotic performance by Rhizobium tropici glycogen synthase mutants AB - We isolated a Tn5-induced Rhizobium tropici mutant that has enhanced capacity to oxidize N,N-dimethyl-p-phenylendiamine (DMPD) and therefore has enhanced respiration via cytochrome oxidase, The mutant had increased levels of the cytochromes c(1) and CycM and a small increase in the amount of cytochrome aa(3). In plant tests, the mutant increased the dry weight of Phaseolus vulgaris plants by 20 to 38% compared with the control strain, thus showing significantly enhanced symbiotic performance. The predicted product of the mutated gene is homologous to glycogen synthases from several bacteria, and the mutant larked glycogen, The DNA sequence of the adjacent gene region revealed six genes predicted to encode products homologous to the following gene products from Escherichia coli: glycogen phosphorylase (glgP), glycogen branching enzyme (glgB), ADP glucose pyrophosphorylase (glgC), glycogen synthase (glgA), phosphoglucomutase pgm), and glycogen debranching enzyme (glgX). All six genes are transcribed in the same direction, and analysis with lacZ gene fusions suggests that the first fire genes are organized in one operon, although pgm appears to have an additional promoter; glgX is transcribed independently. Surprisingly, the glgA mutant had decreased levels of high-molecular-weight exopolysaccharide after growth on glucose, but levels were normal after growth on galactose, A deletion mutant was constructed in order to generate a nonpolar mutation in glgA. This mutant had a phenotype similar to that of the Tn5 mutant, indicating that the enhanced respiration and symbiotic nitrogen fixation and decreased exopolysaccharide were due to mutation of glgA and not to a polar effect on a downstream gene MH - United Kingdom MH - Mexico|Morelos MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000166459500007 L2 - EXOPOLYSACCHARIDE-DEFICIENT MUTANTS; TERMINAL OXIDASE CBB(3); ESCHERICHIA-COLI; AGROBACTERIUM-TUMEFACIENS; NITROGEN-FIXATION; AZORHIZOBIUM-CAULINODANS; STRAIN CIAT899; ACTIVE-SITE; GENE; EXPRESSION SO - Journal of Bacteriology 2001 ;183(3):854-864 3570 UI - 12105 AU - Martel A AU - Caballero-Briones F AU - Bartolo-Perez R AU - Iribarren A AU - Castro-Rodriguez R AU - Zapata-Navarro A AU - Pena JL AD - CINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, VenezuelaCICATA, IPN, Carretera Tampico Puerto Ind Altamira, Altamira 89600, Tamaulipas, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaUniv La Habana, Inst Mat & Reactivos, Havana 10400, CubaBartolo-Perez, R, CINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, AP 73 Cordemex, Merida 97310, Yucatan, Venezuela TI - Chemical and phase composition of SnOx : F films grown by DC reactive sputtering AB - Using X-ray diffraction and X-ray photoelectron spectroscopy we studied the structural variations of SnOx:F films grown by DC reactive sputtering. We used a metallic tin target and an Ar-O-2-Freon plasma. We found that a mixture of compounds, i.e. SnO, Sn3O4, Sn2O3 and SnO2 were formed in the films. From the analysis of the deconvoluted peaks of the X-ray diffractograms and from the X-ray photoelectron spectroscopy results, we obtained the Sn2+ /Sn and Sn4+ /Sn molar fractions present in the films. The dependence of the Sri 2(+) /Sn and Sn4+ /Sn molar fraction with oxygen content was fitted by applying a combinatory model. The Sri (2+) /Sn and Sn4+/Sn molar fractions obtained from XRD and XPS were compared with theoretical values and showed good agreement. When the cathode voltage used to grow the films is varied, the Sn4+/Sn molar fraction shows two well-defined regions, related to the SnO and SnO2 stoichiometries. This is related to the Sn2+ --> Sn4+ transition in the cathode, as described in a previously proposed phase diagram for DC reactive sputter deposition of SnOx:F films. Sn2+ and Sn4+ are both present in the films at low current densities, and SnO and SnO,, are the only species found in these conditions. Sn2O3 and Sn3O4 are formed at current densities over 30 mA cm(-2), when the growth takes place near the transition region in the phase diagram. The growth rates are also affected and closely related with the variations of the cathode voltage in this region. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Tamaulipas MH - Venezuela PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000172875400001 L2 - [B] phase transitions;[B] X-ray diffraction;[B] photoelectron spectroscopy;[C] reactive sputtering;[D] tin oxide;TIN OXIDE-FILMS; ION-BEAM; TARGET; SPECTROSCOPY; DEPOSITION; OXIDATION; OXYGEN SO - Surface & Coatings Technology 2001 ;148(2-3):103-109 3571 UI - 12481 AU - Martel A AU - Caballero-Briones F AU - Iribarren A AU - Castro-Rodriguez R AU - Bartolo-Perez P AU - Pena JL AD - CICATA IPN Altamira, Altamira 89600, Tamaulipas, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaCINVESTAV IPN Merida, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoMartel, A, CICATA IPN Altamira, Km 14-5 Carr Tampico Puerto Ind Altamira, Altamira 89600, Tamaulipas, Mexico TI - Chemical composition and crystalline phases in F-doped tin oxide films grown by DC reactive sputtering AB - We study by x-ray diffraction (XRD) the structural variations on a series of SnOx:F films grown by dc reactive sputtering from a metallic tin target in an Ar-O-2-Freon plasma. We found that the films tend to be crystalline when the stoichiometry approaches to that of SnO or SnO2, being amorphous in between. We fitted the x-ray diffractograms and found that films are composed by a mixture of compounds, i.e. SnO, Sn3O4, Sn2O3 and SnO2, given by the simultaneous presence of Sn+2 and Sn+4. From the analysis of the deconvoluted areas under the x-ray diffractograms we calculate the Sn+2/Sn and Sn+4/Sn molar fraction present in the films. The same calculations are done for the x-ray photoelectron spectroscopy (XPS) results. By applying a combinatory model we fitted the general behavior of SnO. films with different oxygen content versus the Sn+2/Sn and Sn+4/Sn molar fraction. Both XRD and XPS results are compared with the theoretical curve, showing a well agreement MH - Cuba MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900016 SO - Modern Physics Letters B 2001 ;15(17-19):634-638 3572 UI - 11908 AU - Marten S AU - Quesada M AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Jose, Costa RicaQuesada, M, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Phenology, sexual expression, and reproductive success of the rare neotropical palm Geonoma epetiolata AB - We studied the phenology and reproductive biology of the stained glass palm Geonoma epetiolata in a premontane rain forest of Costa Rica. This understory specie's is endemic to Costa Rica and Panama. We followed 102 plants for two years and found that G. epetiolata is monoecious and protandrous. Flowering duration at the inflorescence level is three to six months For the male phase and two to three weeks for the female phase; this is one the most extended flowering periods reported fear palms. Flowering in this palm is continuous throughout the year, both at the individual and Population level. This long and continuous flowering pattern may represent an adaptation to increase the chances of reproduction in a environment of high and unpredictable rainfall. The species is self-compatible, but self-pollination is possible only when there is overlap of male and female inflorescences (38% of the cases). Only 28 percent of the stigmas of 1020 flowers received pollen grains and 20 percent developed pollen tubes in the styles. Of A the flowers produced by an inflorescence, 14 percent initiated fruit development but only 3 percent develop into mature fruits. Seventy-six percent of the initiated fruits were aborted MH - Costa Rica MH - Mexico|Michoacan PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000173456300006 L2 - bet-hedging;dichogamy;fruit abortion;Geonoma epetiolata;monoecy;palm phenology;pollen limitation;RAIN-FOREST; FRUIT INITIATION; COSTA-RICA; POLLINATION; BIOLOGY; PATTERNS; CONSEQUENCES; COMPETITION; UNDERSTOREY; SYNCHRONY SO - Biotropica 2001 ;33(4):596-605 3573 UI - 13871 AU - Martin X AU - O'Connor D AU - Rideout D AU - Sorkin RD AD - CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoSyracuse Univ, Dept Phys, Syracuse, NY 13244, USAMartin, X, CINVESTAV, Dept Fis, Apartado Postal 70543, Mexico City 07300, DF, Mexico TI - "Renormalization" transformations induced by cycles of expansion and contraction in causal set cosmology AB - We study the "renormalization group action" induced by cycles of cosmic expansion and contraction, within the context of a family of stochastic dynamical laws for causal sets derived earlier. We find a line of fixed points corresponding to the dynamics of transitive percolation, and we prove that there exist no other fixed points and no cycles of length greater than or equal to2. We also identify an extensive ''basin of attraction" of the fixed points but find that it does not exhaust the full parameter space. Nevertheless, we conjecture that every trajectory is drawn toward the fixed point set in a suitably weakened sense MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000168203400055 L2 - QUANTUM SO - Physical Review D 2001 ;6308(8): 3574 UI - 12808 AU - Martinez-Burnes J AU - Lopez A AU - Horney B AU - MacKenzie A AU - Brimacombe M AD - Univ Autonoma Tamaulipas, Fac Med Vet & Zootecn, Tamaulipas 87000, MexicoUniv Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Dept Hlth Management, Charlottetown, PE C1A 4P3, CanadaMartinez-Burnes, J, Univ Autonoma Tamaulipas, Fac Med Vet & Zootecn, Km 5 Carretera Victoria Mante,Ciudad Victoria, Tamaulipas 87000, Mexico TI - Cytologic and biochemical changes associated with inoculation of amniotic fluid and meconium into lungs of neonatal rats AB - Objective-To evaluate the effect of homologous amniotic fluid and meconium inoculated intratracheally into the lungs of neonatal rats. Animals-153 male 7-day-old Fischer-344 rats. Procedure-Amniotic fluid was obtained by cesarean section from the uterus of pregnant rats and meconium was collected at the time of birth from the gastrointestinal tract of neonatal rats. Neonatal rats were randomly allocated into 5 treatment groups. Two groups received 0.05 ml of saline (0.9% NaCl) solution; the third and fourth groups received 0.05 ml of 50% or 100% amniotic fluid, respectively; the fifth group was inoculated with 0.05 ml of a 20% suspension of meconium. Six or 7 rat pups/group were euthanatized by exsanguination under halothane anesthesia at postinoculation days 1, 3, 7, and 14. The magnitude of injury and inflammatory response was determined by biochemical and cytologic analyses of bronchoalveolar lavage fluid. Results-Inoculation with saline solution and amniotic fluid did not induce pulmonary injury or inflammatory response. Inoculation with meconium induced significant (P < 0.01) injury and inflammatory response, characterized by the release of cytosolic enzymes and recruitment of neutrophils in the lung. Conclusions-Saline solution is an innocuous vehicle that can be safely used in intratracheal inoculations in neonatal rats. Homologous amniotic fluid, despite containing keratin and epidermal cells, does not cause acute injury or inflammation in the lung. In contrast, meconium acts as a toxic substance injuring respiratory cells and causing a vigorous but transient leukocytic inflammatory reaction in the lungs MH - Canada MH - Mexico|Tamaulipas PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 7 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000171270700021 L2 - ASPIRATION SYNDROME; BRONCHOALVEOLAR LAVAGE; INFLAMMATION; VENTILATION; INJURY; DAMAGE; CALVES; MODEL; CELLS; PIGS SO - American Journal of Veterinary Research 2001 ;62(10):1636-1641 3575 UI - 13772 AU - Martinez-Burnes J AU - Lopez A AU - Lemke K AU - Dobbin G AD - Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol, Charlottetown, PE, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Dept Microbiol, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Dept Compan Anim, Charlottetown, PE C1A 4P3, CanadaMartinez-Burnes, J, Univ Autonoma Tamaulipas, Fac Med Vet & Zoot, Km 4 Carretera Victora Mante, Tamaulipas 87000, Mexico TI - Transoral intratracheal inoculation method for use with neonatal rats AB - Background and Purpose: Studying the effects of toxic and infective compounds on the respiratory system requires a reliable method for delivering inoculum into the distal region of the lung. Although transoral intratracheal inoculation methods have been well documented for adult rats, to the authors' knowledge, a reliable method has not been validated for neonatal rats. The purpose of the study reported here was to develop a simple method for transoral inoculation in rat neonates, Methods: Seven-day-old Fischer 344 rats were anesthetized with halothane, and a spinal needle was inserted in the tracheal lumen, by use of illumination and a modified otoscope, Meconium was injected into the lungs as a marker, and the neonates were kept under close observation After euthanasia at 24 h, lungs were removed and fixed in formalin, and the microscopic distribution of the inoculum was assessed in the left, right cranial, middle, median, and caudal lung lobes. Results: Microscopic examination of lungs indicated that intratracheal inoculation was achieved in 100% of neonatal, lungs and the inoculum was consistently distributed in the alveoli of all pulmonary lobes, Important complications or mortality were not observed in the neonates, Conclusions: Intratracheal inoculation of neonatal rats is possible by use of a modified otoscope for transoral illumination. This technique is simple and reproducible and ensures, without complications, widespread distribution of inoculum in the lungs of neonatal rats MH - Canada MH - Mexico|Tamaulipas PB - MEMPHIS: AMER ASSOC LABORATORY ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Veterinary Sciences;Zoology U5 - J;Article AV - English IS - 0023-6764 UR - ISI:000168485100007 L2 - MECONIUM ASPIRATION; LUNG; INSTILLATION; INHALATION; PARTICLES; SURGERY SO - Comparative Medicine 2001 ;51(2):134-137 3576 UI - 12200 AU - Martinez-Bustos F AU - Martinez-Flores HE AU - Sanmartin-Martinez E AU - Sanchez-Sinencio F AU - Chang YK AU - Barrera-Arellano D AU - Rios E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, Qro, MexicoIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro, Qro, MexicoUNICAMP, FEA, BR-13083 Campinas, SP, BrazilIPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioingn, Mexico City, DF, MexicoMartinez-Bustos, F, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Apdo Postal 1-798, Queretaro 76001, Qro, Mexico TI - Effect of the components of maize on the quality of masa and tortillas during the traditional nixtamalisation process AB - In this work the importance of maize pericarp and germ in relation to the overall quality of masa and tortillas was studied. Alkaline-cooking originated alterations in the outer layers of the grain. Its components were hydrated and the pericarp fraction assumed a gummy and sticky texture. During the liming process, some components from the germ, pericarp and tip cap fractions released 'maize hull gums', increasing the contents of xylose, galactose and D-glucuronic acid. The presence of gums and insolubilised germ that remained after the traditional washing of the nixtamal improved the viscosity, cohesiveness and adhesiveness of the masa and tortillas as compared to the dry masa and tortillas from nixtamal with the germ removed and from exhaustively washed nixtamal, where most of the hull gums and germ were removed. Fresh tortillas or tortillas stored for 24h at room temperature prepared using the traditional process of nixtamalisation (washed twice) were more stretchable, elastic and resistant to tearing and cracking than tortillas prepared with exhaustively washed nixtamal or with nixtamal washed twice with the germ removed. Tortillas from nixtamal with the germ removed showed the worst texture, rollability and puffing. (C) 2001 Society of Chemical Industry MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000172708600007 L2 - maize;tortillas;pericarp;germ;nixtamalisation;CORN; SORGHUM; KERNELS; COOKING SO - Journal of the Science of Food and Agriculture 2001 ;81(15):1455-1462 3577 UI - 14052 AU - Martinez-Diaz SF AU - Martinez-Pecero R AU - Rosales-Velazquez MO AU - varado-Castillo R AU - Perez-Espana H AU - Tucker JW AD - Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Expt Biol Lab, La Paz, Baja Calif Sur, MexicoInst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Age & Growth Lab, La Paz, Baja Calif Sur, MexicoCtr Ecol Costera, San Patricio Melaque 48980, Jalisco, MexicoHarbor Branch Oceanog Inst Inc, Div Marine Sci, Ft Pierce, FL 34946, USAMartinez-Diaz, SF, Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Expt Biol Lab, Playa Conchalito Sn,CP 23000,Apdo Postal 592, La Paz, Baja Calif Sur, Mexico TI - Voluntary spawning, early development, and completion of the life cycle of spotted sand bass Paralabrax maculatofasciatus in the laboratory AB - Spawning behavior and development of spotted sand bass Paralabrax maculatofasciatus were studied in the laboratory. Captive fish (15-20 cm standard length) spawned in 100-L aquaria at 24 C and 35 ppt salinity with a controlled photoperiod (13 h light: 11 h dark). Distinct courtship coloration and displays were observed. Courtship began near noon and continued all afternoon. Spawning occurred toward the surface during late afternoon. Development from fertilization to 3 d after hatching is described. Hatching occurred in 24-25 h at 24 C. Larvae were reared in 100-L aquaria with microalgae. rotifers. and Artemia. First feeding occurred 3 d after hatching, and 5.3% survival was obtained at 17 d (4.1-mm mean notochord length. 1.7-5.5 mm range). On a diet of minced clams and fish. first maturity was reached at 7.5 mo (19.5 g mean weight, 8.3-37.9 g range and 90 mm mean standard length. 66-116 mm range) MH - Mexico|Baja California Sur MH - Mexico|Jalisco MH - USA PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 3 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000167723500016 L2 - SERRANIDAE; PISCES SO - Journal of the World Aquaculture Society 2001 ;32(1):122-129 3578 UI - 14507 AU - Martinez-Diez JA AU - Rodriguez-Perez MA AU - de Saja JA AU - Rabago LOA AU - Almanza OA AD - Univ Valladolid, Fac Ciencias, Dept Fis Mat Condensada, Polmer Foams Grp, E-47011 Valladolid, SpainUniv Autonoma Queretaro, Fac Ingn, Santiago de Queretaro 76010, Queretaro, MexicoUniv Nacl Colombia, Dept Fis, Santa Fe de Bogota, DC, ColombiaRodriguez-Perez, MA, Univ Valladolid, Fac Ciencias, Dept Fis Mat Condensada, Polmer Foams Grp, E-47011 Valladolid, Spain TI - The thermal conductivity of a polyethylene foam block produced by a compression molding process AB - The thermal conductivity of 10 mm thick low density polyethylene foam sheets cut from a block produced by a compression molding process has been studied in the temperature range between 24 degreesC and 50 degreesC. The cellular structure and the matrix polymer morphology have also been characterized to find out the main microscopic characteristics that influence on the foam properties. A previously developed theoretical model has been applied to compute the thermal conductivity of the foams under study. This model was successful in the considered temperature range. Moreover, the evolution of the thermal conductivity along the thickness of the foam block has also been considered and explained in terms of the structure of the materials MH - Colombia MH - Mexico|Queretaro MH - Spain PB - LANCASTER: TECHNOMIC PUBL CO INC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Applied;Polymer Science U5 - J;Article AV - English IS - 0021-955X UR - ISI:000166428000001 L2 - HEAT-TRANSFER; POLYSTYRENE SO - Journal of Cellular Plastics 2001 ;37(1):21-42 3579 UI - 12284 AU - Martinez-Estevez M AU - Loyola-Vargas VM AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cient Yucatan, unidad Biol Expt, Merida 97310, Yuc, MexicoInst Nacl Ciencias Agr, Havana, CubaHernandez-Sotomayor, SMT, Ctr Invest Cient Yucatan, Unidad Biol Expt, Merida 97310, Yuc, Mexico TI - Aluminum increases phosphorylation of particular proteins in cellular suspension cultures of coffee (Coffea arabica) AB - Aluminum (Al) is the most abundant metal in the earth's crust and occurs in a number of different forms in the soil. Al toxicity is a global problem that limits crop productivity in acid soils. Coffee is a plant which grows in soils with a high organic matter content, and AI is available in these soils because they are acidic. In the present work, we demonstrate the effect of aluminum toxicity on the phosphorylation pattern of proteins. Coffea arabica suspension cells were incubated with increasing concentrations of AlCl3 (200-1000 mu mol/L), and an in vitro phosphorylation reaction with cell extracts was performed. There was no change in the proteins present in extracts from cells treated with AlCl3, compared with untreated cells. However, the protein phosphorylation patterns did change. The phosphorylated proteins with a molecular mass of 18, 31 and 53 kDa increased dramatically after in vivo treatment of cells with AlCl3. When AlCl3 was added to the reaction mixture, no differences in phosphorylation patterns were observed. These results suggest that in vivo treatment of Coffea cells with AlCl3 affects the activity of some protein kinases MH - Cuba MH - Mexico|Yucatan PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000172442500002 L2 - aluminum;Coffea arabica;protein phosphorylation;KINASE; PLANTS; PHOSPHATASES; INHIBITION; TOXICITY; ROOTS; ACID SO - Journal of Plant Physiology 2001 ;158(11):1375-1379 3580 UI - 13099 AU - Martinez-Estevez M AU - Munoz-Sanchez JA AU - Loyola-Vargas VM AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cient Yucatan, Unidad Biol Expt, Merida, Yucatan, MexicoInst Nacl Ciencias Agr, Havana, CubaHernandez-Sotomayor, SMT, Ctr Invest Cient Yucatan, Unidad Biol Expt, Apdo Postal 87, Merida, Yucatan, Mexico TI - Modification of the culture medium to produce aluminum toxicity in cell suspensions of coffee (Coffea arabica L.) AB - Coffee (Coffea arabica) plants are usually grown in soils containing high levels of organic materials. Under these conditions, aluminum (Al) is toxic because of the acidic nature of the soils. Al is the most abundant metal found in the earth's crust and occurs in a number of different forms in soil. In acid soils, AI toxicity is a global problem that limits crop productivity. A major problem in obtaining cellular lines displaying AI tolerance in culture is the composition of the medium. In the experiments presented here, we modified the composition of the culture medium for a C. arabica cell line to produce Al toxicity. Murashige-Skoog media was used, complete (MS) and half ionic strength (MSHIS), at either pH 5.8 or 4.3. We found that MSHIS and pH 4.3 provided the optimal conditions to obtain Al toxicity as measured by the ability to grow in a range of Al concentrations (25-1,000 muM). The lethal dose (LD50) under these conditions was 25 muM. The concentrations of free Al in the culture medium were corroborated by the fluorescent compound Morin. Al was found to enter the cell after 30 min, and the signal was then retained for up to 2 h MH - Cuba MH - Mexico|Yucatan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences U5 - J;Article AV - English IS - 0721-7714 UR - ISI:000170337100016 L2 - aluminum toxicity;Coffea arabica;suspension culture;Morin;TOLERANT CELLS; CARROT; ACID; RELEASE; GROWTH; ROOTS SO - Plant Cell Reports 2001 ;20(5):469-474 3581 UI - 13469 AU - Martinez-Gomez JE AU - Flores-Palacios A AU - Curry RL AD - Villanova Univ, Dept Biol, Villanova, PA 19085, USAInst Ecol AC, Dept Ecol Vegetal, Xalapa 91000, Veracruz, MexicoMartinez-Gomez, JE, Univ Missouri, Dept Biol, 8001 Nat Bridge Rd, St Louis, MO 63121 USA TI - Habitat requirements of the Socorro Mockingbird Mimodes graysoni AB - The population size of the Socorro Mockingbird Mimodes graysoni, which represents a monotypic genus endemic to Socorro Island, Mexico, has declined dramatically within the last 40 years. Postulated causal factors include competitive exclusion by Northern Mockingbirds Mimus polyglottos, predation by feral cats and overgrazing by feral sheep. Habitat degradation looms as the primary candidate because surviving Socorro Mockingbirds live mainly in areas of the island with little apparent habitat damage, and because Northern Mockingbirds and cats both arrived on Socorro after much of the decline had occurred. Isolating key factors is difficult, however, because the present distributions of cats and Northern Mockingbirds coincide broadly with patterns of habitat degradation. To investigate habitat requirements of the endemic mockingbird in detail, we measured vegetation characteristics at localities with and without Socorro Mockingbirds, and observed their foraging behaviour. Socorro Mockingbirds occupied sites in montane regions covered with Ilex socorroensis, Guettarda insularis, Triumfetta socorrensis and Eupatorium pacificum; they were also abundant in pristine lowland forests. Socorro Mockingbirds were scarce in disturbed forests where Dodonaea viscosa has replaced the original understorey, and they were absent from low-elevation Crotan masonii scrub, even in areas with no signs of degradation. Restoration of degraded habitat could help the population of Socorro Mockingbirds grow and reoccupy more of its former range MH - Mexico|Veracruz MH - USA PB - TRING: BRITISH ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 2 U4 - Ornithology U5 - J;Article AV - English IS - 0019-1019 UR - ISI:000169327100012 L2 - REVILLAGIGEDO-ISLANDS; MEXICO; DENSITY SO - Ibis 2001 ;143(3):456-467 3582 UI - 13162 AU - Martinez-Palacios CA AU - Cabanillas-Beltran H AU - Ponce-Palafox JT AU - Sanchez MCC AU - Ross LG AD - UMSNH, Inst Invest Recursos Nat, Morelia, Michoacan, MexicoInst Tecnol Tepic, Tepic, Nayarit, MexicoUniv Autonoma Nayarit, Tepic, Nayarit, MexicoCtr Invest Alimentac & Desarrollo, Unidad Mazatlan, Mazatlan, Sinaloa, MexicoUniv Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandMartinez-Palacios, CA, UMSNH, Inst Invest Recursos Nat, Avenida San Juanito Itzicuaro S-N,Col San Juanito, Morelia, Michoacan, Mexico TI - A modified chamber designed for estimation of digestibility in shrimp AB - The science of the feeding and nutrition of crustaceans is still in development, and producers and feed manufacturers need better understanding of the digestibility of various nutrients. The most widely used method of determining digestibility in vivo in fish is based on the measurement of chromium oxide (which is incorporated into the diet) in feces. To use this method, it is essential to have an efficient means of collecting feces in the aquatic environment. In shrimp, this presents some difficulties because of their benthic feeding and coprophagic habits. This paper describes the development and testing of a low-cost modification of the "Guelph" system used for fish that allows the collection of feces from shrimp. The system performed extremely well and had clear advantages over the basic siphon system. The importance of having an easy and efficient method of collecting feces for in vivo assays is discussed MH - Mexico|Michoacan MH - Mexico|Nayarit MH - Mexico|Sinaloa MH - United Kingdom PB - BETHESDA: AMER FISHERIES SOC RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 1522-2055 UR - ISI:000170140200012 SO - North American Journal of Aquaculture 2001 ;63(3):252-255 3583 UI - 13696 AU - Martinez-Quiroz E AU - Aguilera EF AU - Kolata JJ AU - Zahar M AD - Inst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Notre Dame, Dept Phys, Notre Dame, IN 46556, USAMartinez-Quiroz, E, Inst Nacl Invest Nucl, Dept Acelerador, Apartado Postal 18-1027, Mexico City 11801, DF, Mexico TI - Sub-barrier fusion of Cl-37+Ge-70,Ge-72,Ge-73,Ge-74,Ge-76 AB - Fusion excitation functions were obtained for Cl-37+ Ge-70,Ge-72,Ge-73,Ge-74,Ge-76 at energies from about 6 MeV below to 7 MeV above the Coulomb barrier. The barrier parameters extracted from the data agree within 3% with those obtained from the systematics for fusion above the barrier. Low-energy enhancements are observed, whose behavior is explained within the context of simple model calculations by assigning appropriate degrees of freedom to the respective reaction partners. These degrees of freedom reflect the shape transition between spherical Ge-70,Ge-72,Ge-73 and prolate-deformed Ge-74,Ge-76, and show also remarkable effects of the odd-A structure of Ge-73. The results are consistent with those of similar analysis of different data sets where the same targets were used. The possible effects of double identical-phonon states for spherical nuclei, hexadecapole deformations for deformed ones, and nucleon transfer are also examined. An analysis of the barrier distributions is made, which indicates consistency with the assumed degrees of freedom MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000168640900034 L2 - HEAVY-ION FUSION; INELASTIC-SCATTERING; SUBBARRIER FUSION; ENERGIES; ISOTOPES; GE-72; MULTIPHONON; DEFORMATION; GERMANIUM SO - Physical Review C 2001 ;6305(5): 3584 UI - 10901 AU - Martinez-Reyna JM AU - Vogel KP AU - Caha C AU - Lee DJ AD - Univ Nebraska, USDA ARS, Lincoln, NE 68588, USAUniv Autonoma Agraria Antonio Narro, Saltillo, Coahuila, MexicoUniv Nebraska, Dept Agron, Lincoln, NE 68583, USAVogel, KP, Univ Nebraska, USDA ARS, 344 Keim Hall,POB 830937, Lincoln, NE 68588 USA TI - Meiotic stability, chloroplast DNA polymorphisms, and morphological traits of upland x lowland switchgrass reciprocal hybrids AB - Switchgrass (Panieum virgatum L.) has two cytotypes or cytoplasm types, L and U, that are associated with the lowland and upland ecotypes, respectively. The L cytotypes are tetraploids while the U cytotypes can be either tetraploids or octaploids. The objective of this research was to characterize meiotic stability of reciprocal crosses of U and L plants as indicated by chromosome pairing at meiosis and to determine the mode of inheritance of chloroplast DNA (cpDNA) in the hybrids of these cytotypes. Morphological markers that characterize the parents and hybrids also were investigated to confirm that progeny were true hybrids. Reciprocal crosses were made between Kanlow (L tetraploid) and Summer (U tetraploid) plants. Pubescence on the upper surface of the leaf blade, foliage color, and seed size were evaluated as markers to verify hybridization. Meiotic pairing of some of the hybrids was analyzed at the diakinesis stage of meiosis by means of immature anthers. The clone pRR12 from a spinach (Spinacia oleracea L.) cpDNA library was used as a chloroplast hybridization probe to determine chloroplast inheritance. For all the morphological traits evaluated, the hybrids were intermediate in comparison to the parents except for seed width. Chromosome pairing was primarily bivalent in all hybrids. The viability of the hybrid seed and the normal meiotic chromosome pairing of the hybrids indicate a high degree of similarity between upland and lowland genomes. In the cpDNA analysis, all verified hybrids examined carried a fragment identical in size to the fragment of the female parent, indicating predominance of maternal inheritance of the cpDNA in switchgrass MH - Mexico|Coahuila MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000176236800032 L2 - POPULATIONS SO - Crop Science 2001 ;41(5):1579-1583 3585 UI - 14028 AU - Martinez-Ruiz A AU - Valenzuela-Benavides J AU - de la Garza LM AU - Batina N AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoCtr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoValenzuela-Benavides, J, UNAM, CCMC, POB 439036, San Ysidro, CA 92143 USA TI - Underpotential deposition of Cu on iodine-modified Au(111): an in situ scanning tunneling microscopy study AB - The electrochemical deposition of Cu on iodine-modified Au(111) surfaces has been investigated by in situ electrochemical scanning tunneling microscopy (ECSTM) and cyclic voltammetry (CV) in sulfuric acid solutions. In situ ECSTM studies reveal different iodine adlayer structures before and during the process of copper underpotential deposition (UPD). At the beginning of the cathodic scan and for potentials higher than the onset of UPD a c(p x root 3R-30 degrees) iodine structure is observed on wide terraces. For lower potentials this iodine structure transforms to a more compact (3 x 3) structure characterized by two different structural variations (symmetric and asymmetric) sometimes observed coexisting in the same terrace. Charge transfer analysis from CV measurements reveals that the amount of copper deposited at these potentials is not sufficient to account for this structure in the framework of a hard-ball structural model. During the UPD process itself other iodine structures are also observed as a function of copper deposition, together with an additional compression of the iodine adlayer associated with the formation of a Cul bilayer, in agreement with previously reported X-ray diffraction data. At the end of the UPD process a Cu(1 x 1) monolayer is formed with a lattice parameter equal to that of Au(111). The same course of structural changes was also observed during the anodic scan where stripping of the copper layer takes place, returning to the initial iodine c(p x root 3R-30 degrees) structure. Our results strongly suggest that the iodine adlayer is constantly present as the top layer during the process of electrodeposition and stripping of Cu with no noticeable loss of iodine in the process. The observed structures are discussed in terms of iodine-copper interactions. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000167772300007 L2 - electrochemical methods;scanning tunneling microscopy;chemisorption;surface structure, morphology, roughness, and;topography;copper;gold;iodine;solid-liquid interfaces;SINGLE-CRYSTAL ELECTRODES; PERCHLORIC-ACID SOLUTION; ATOMIC-FORCE MICROSCOPY; X-RAY-SCATTERING; SULFURIC-ACID; INTERFACIAL STRUCTURE; AQUEOUS-SOLUTION; SILVER ADLAYERS; PT(111); COPPER SO - Surface Science 2001 ;476(3):139-151 3586 UI - 14262 AU - Martinez-Trinidad JF AU - Ruiz-Shulcloper J AD - Inst Politecn Nacl, Ctr Invest Computac, Lab Proc Digital Imagenes, Mexico City 07738, DF, MexicoCITMA, Inst Cibernet Matemat & Fis, La Habana 10400, CubaRuiz-Shulcloper, J, Inst Politecn Nacl, Ctr Invest Computac, Lab Proc Digital Imagenes, Juan de Dios Batiz SN Esq Con M Othon de Mendizab, Mexico City 07738, DF, Mexico TI - Fuzzy clustering of semantic spaces AB - In this paper the GK* model for the construction of thesaurus classes based on fuzzy semantic association measure between index terms and concepts (thesaurus classes) is presented. The association measure is obtained on the basis of fuzzy semantic relations between index terms, and it is used to cluster index terms into concepts. A hierarchical algorithm is introduced which runs on a simple numerical example. (C) 2001 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0031-3203 UR - ISI:000167019700004 L2 - information retrieval;fuzzy clustering;index terms;fuzzy relations;semantic association measure;logical combinatorial pattern recognition SO - Pattern Recognition 2001 ;34(4):783-793 3587 UI - 12118 AU - Martinez A AU - Tenorio FJ AU - Ortiz JV AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoOrtiz, JV, Kansas State Univ, Dept Chem, Manhattan, KS 66506, USA TI - Electronic structure of AlO2, AlO2-, Al3O5, and Al3O5- clusters AB - Density functional, quadratic configuration interaction, and electron propagator calculations have yielded structures, isomerization energies, and anion vertical electron detachment energies pertaining to AlO2, AlO2-, Al3O5, and Al3O5-. These data suffice for an accurate assignment of recent anion photoelectron spectra. Al3O5- has a planar structure with three tricoordinate Al cations, three bridging oxides, and two terminal oxides. Dyson orbitals associated with the lowest electron detachment energies are dominated by p functions on terminal oxygens MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000172945600018 L2 - GAUSSIAN-BASIS SETS; PHOTOELECTRON-SPECTROSCOPY; IONIZATION ENERGIES; PROPAGATOR SO - Journal of Physical Chemistry A 2001 ;105(50):11291-11294 3588 UI - 12774 AU - Martinez A AU - Tenorio FJ AU - Ortiz JV AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoOrtiz, JV, Kansas State Univ, Dept Chem, Manhattan, KS 66506, USA TI - Electronic structure of Al3On and Al3On- (n=1-3) clusters AB - Density functional, quadratic configuration interaction and electron propagator calculations have yielded structures, isomerization energies, and anion vertical electron detachment energies pertaining to Al3On- and Al3On, where n = 1, 2, or 3. These data suffice for an accurate assignment of recent anion photoelectron spectra. Peaks whose relative intensities vary with experimental conditions of ion preparation and transport are associated with isomers whose energies are close to those of the lowest singlet structures. Dyson orbitals associated with the lowest electron detachment energies are dominated by Al-centered functions with antibonding relationships to nearby O centers MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000171214100026 L2 - GAUSSIAN-BASIS SETS; IONIZATION ENERGIES; PROPAGATOR; MOLECULES SO - Journal of Physical Chemistry A 2001 ;105(38):8787-8793 3589 UI - 13959 AU - Martinez A AU - Rodriguez ME AU - Wells ML AU - York SW AU - Preston JF AU - Ingram LO AD - Univ Florida, Dept Microbiol & Cell Sci, Inst Food & Agr Sci, Gainesville, FL 32611, USAUniv Autonoma Madrid, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoIngram, LO, Univ Florida, Dept Microbiol & Cell Sci, Inst Food & Agr Sci, Gainesville, FL 32611 USA TI - Detoxification of dilute acid hydrolysates of lignocellulose with lime AB - The hydrolysis of hemicellulose to monomeric sugars by dilute acid hydrolysis is accompanied by the production of inhibitors that retard microbial fermentation. Treatment of hot hydrolysate with Ca(OH)(2) (overliming) is an effective method for detoxification. Using ethanologenic Escherichia coli LY01 as the biocatalyst, our results indicate that the optimal lime addition for detoxification varies and depends on the concentration of mineral acids and organic acids in each hydrolysate. This optimum was shown to be readily predicted on the basis of the titration of hydrolysate with 2 N NaOH at ambient temperature to either pH 7.0 or pH 11.0. The average composition of 15 hydrolysates prior to treatment was as follows (per L): 95.24 +/- 7.29 g sugar, 5.3 +/- 2.99 g acetic acid, 1.305 +/- 0.288 g total furans (furfural and hydroxymethylfurfural) and 2.86 +/- 0.34 g phenolic compounds. Optimal overliming resulted in a 51 +/- 9% reduction of total furans, a 41 +/- 6% reduction in phenolic compounds, and a 8.7 +/- 4.5% decline in sugar. Acetic acid levels were unchanged. Considering the similarity of microorganisms, it is possible that the titration method described here may also prove useful for detoxification and fermentation processes using other microbial. biocatalysts MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 50 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 8756-7938 UR - ISI:000168044700011 L2 - ETHANOLOGENIC ESCHERICHIA-COLI; SACCHAROMYCES-CEREVISIAE; FERMENTATION INHIBITORS; TRAMETES-VERSICOLOR; XYLOSE FERMENTATION; GROWTH; STRAIN; 2,3-BUTANEDIOL; SOFTWOOD; LACCASE SO - Biotechnology Progress 2001 ;17(2):287-293 3590 UI - 14555 AU - Martinez A AU - Calaminici P AU - Koster AM AU - Salahub DR AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoNatl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, CanadaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoMartinez, A, Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Bonding in Nb3O, Nb3S and Nb3Se: A topological analysis of the electrostatic potential AB - The structures of different neutral and cationic isomers of Nb3O, Nb3S and Nb3Se were optimized within the framework of Kohn-Sham density functional theory. For Nb3O, neutral and cationic, the lowest minimum is a planar C-2v structure with an edge-bound oxygen atom. The binding energy of the oxygen to the Nb-3 cluster is 184.9 kcal/mol, 185.4 kcal/mol for the cationic system. For Nb3S and Nb3Se, neutral and cationic, the lowest minima are three-dimensional structures. The corresponding binding energies are 137.9, 138.1, 131.8 and 132.3 kcal/mol for Nb3S, Nb3S+, Nb3Se and Nb3Se+, respectively. In order to explain the different ground state structures of Nb3O, on the one hand, and Nb3S and Nb3Se, on the other, in terms of the nature of the bonding in each of them a topological analysis of the molecular electrostatic potential was performed. The different relative stabilities of two- and three-dimensional structures can be explained on the basis of bond critical points in the molecular electrostatic potential. (C) 2001 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000166213000020 L2 - DENSITY-FUNCTIONAL CALCULATIONS; MINIMAL CHARACTERISTICS; CORRELATION-ENERGY; ALUMINUM CLUSTERS; APPROXIMATION; MOLECULES; ACCURATE; OPTIMIZATION; SPECTROSCOPY; DIMER SO - Journal of Chemical Physics 2001 ;114(2):819-825 3591 UI - 10644 AU - Martinez F AU - Niks RE AU - Singh RP AU - Rubiales D AD - CSIC, Inst Agr Sostenible, Dept Agron & Mejora Genet Vegetal, Cordoba 14080, SpainDept Plant Breeding, Wageningen, NetherlandsCIMMYT, Mexico City, DF, MexicoMartinez, F, CSIC, Inst Agr Sostenible, Dept Agron & Mejora Genet Vegetal, Apdo 4084, Cordoba 14080, Spain TI - Characterization of Lr46, a gene conferring partial resistance to wheat leaf rust AB - Components of resistance conferred by the Lr46 gene, reported as causing "slow rusting" resistance to leaf rust in wheat, were studied and compared with the effects of Lr34 and genes for quantitative resistance in cv. Akabozu. Lr34 is a gene that confers non-hypersensitive type of resistance. The effect of Lr46 resembles that of Lr34 and other wheats reported with partial resistance. At macroscopic level, Lr46 produced a longer latency period than observed on the susceptible recurrent parent Lalbahadur, and a reduction of the infection frequency not associated with hypersensitivity. Microscopically, Lr46 increased the percentage of early aborted infection units not associated with host cell necrosis and decreased the colony size. The effect of Lr46 is comparable to that of Lr34 in adult plant stage, but in seedling stage its effect is weaker than that of Lr34 MH - Mexico|Distrito Federal MH - Netherlands MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 5 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-0661 UR - ISI:000176985900004 L2 - PUCCINIA-HORDEI; BARLEY; CULTIVARS; COLONIES; ABORTION SO - Hereditas 2001 ;135(2-3):111-114 3592 UI - 13230 AU - Martinez FJ AU - Zeng GQ AU - Pineyro A AU - Garza-Ocanas L AU - Tomei LD AU - Umansky SR AD - Univ Autonoma Nuevo Leon, Sch Med, Dept Pharmacol & Toxicol, Monterrey 64460, NL, MexicoUniv Autonoma Nuevo Leon, Sch Med, Dept Internal Med, Monterrey 64460, NL, MexicoLXR Biotechnol Inc, Richmond, CA 94804, USADIAGEN Corp, Richmond, CA 94805, USAMartinez, FJ, Univ Autonoma Nuevo Leon, Sch Med, Dept Pharmacol & Toxicol, Ave Gonzalitos 235 Norte, Monterrey 64460, NL, Mexico TI - Apoptosis induction and cell cycle perturbation in established cell lines by peroxysomicine A(1) (T-514) AB - Peroxysomicine A(1), a novel potential anticancer compound induced cell death in established cell lines and in a primary culture of rat neonatal cardiomyocytes. Non-transformed cells are less sensitive to the compound than transformed cell lines. Fluorescent microscopy of dying cells stained with DNA-specific dyes revealed chromatin condensation and nuclear fragmentation as well as membrane blebbing characteristic of apoptosis. Flow cytometry of cells treated with peroxysomicine A(1), demonstrated appearance of cells containing less than 2C DNA, that indicated degradation of nuclear DNA, another hallmark of apoptotic cell death. Z-VAD, a nonspecific caspase inhibitor, prevented DNA fragmentation but not cell death registered by permeabilization of cell outer membrane. Peroxysomicine A(1) also inhibited proliferation of various cell lines. Flow cytometry analysis showed significant accumulation of dividing cells in G(2)/M phases of cell cycle indicating, most likely delay in G(2) These results provide initial insight into the mechanisms of action of peroxysomicine A(1) and suggest that peroxysomicine A(1) is a potent inhibitor of cell proliferation and inducer of apoptosis and may be a useful antineoplastic chemotherapeutic agent MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0148-0545 UR - ISI:000170046500006 L2 - CHEMOTHERAPY-INDUCED APOPTOSIS; DNA FRAGMENTATION; KARWINSKIA-HUMBOLDTIANA; CANCER-CHEMOTHERAPY; DEPENDENT KINASES; ANTICANCER DRUGS; LEUKEMIA-CELLS; TOXIN T-514; IN-VIVO; DEATH SO - Drug and Chemical Toxicology 2001 ;24(3):287-299 3593 UI - 13779 AU - Martinez I AU - Bustos J AU - Melero JA AD - Inst Salud Carlos III, Ctr Nacl Biol Fundamental, E-28220 Madrid, SpainUAM Xochimilco, Dept Atenc Salud, Mexico City, DF, MexicoMelero, JA, Inst Salud Carlos III, Ctr Nacl Biol Fundamental, E-28220 Madrid, Spain TI - Reduced expression of surface glycoproteins in mouse fibroblasts persistently infected with human respiratory syncytial virus (HRSV) AB - BCH4 cells, persistently infected with Human Respiratory Syncytial Virus (HRSV), were obtained by Fernie et al. [12] after infection of a BALB/c mouse embryo cell line with the Long strain of HRSV. To understand the basis of HRSV persistence, the expression of HRSV RNAs and proteins was evaluated in BCH4 cells and infected parental BALB/c and fully permissive HEp-2 cells. Production of viral mRNAs was severely impaired in BCH4 cells. In addition, the expression level of the surface glycoproteins F and G was markedly reduced relative to internal viral proteins. However, virus recovered from BCH4 cells could lytically infect HEp-2 cells and expressed normal levels of surface glycoproteins. No evidence of defective genomes or interfering particles was found in BCH4 cells. Taken together, these data indicate that reduction of both viral mRNA accumulation and surface glycoprotein biosynthesis are at the basis of HRSV persistence in BCH4 cells MH - Mexico|Distrito Federal MH - Spain PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 2 U4 - Virology U5 - J;Article AV - English IS - 0304-8608 UR - ISI:000168533400003 L2 - RECOMBINANT VACCINIA VIRUS; ALVEOLAR MACROPHAGES; NUCLEOTIDE-SEQUENCE; CYTOPLASMIC INCLUSIONS; ANTIGENIC STRUCTURE; SUBGROUP-A; P-PROTEIN; CELLS; PHOSPHOPROTEIN; SIMIAN-VIRUS-5 SO - Archives of Virology 2001 ;146(4):669-683 3594 UI - 12405 AU - Martinez IM AU - Lumaret JP AU - Cruz MR AD - Univ Montpellier 3, Lab Zoogeog, F-34199 Montpellier 5, FranceInst Ecol, Dept Ecol & Comportamienot Anim, Xalapa 91000, Veracruz, MexicoLumaret, JP, Univ Montpellier 3, Lab Zoogeog, Route Mende, F-34199 Montpellier 5, France TI - Suspected side effects of a herbicide on dung beetle populations (Coleoptera : Scarabaeidae) AB - This paper addresses the association between use of a herbicide and anecdotal reports of reduced dung degradation and dung beetle populations. Dung beetles were monthly collected at two adjacent ranches in Mexico. Ranches were similar in area, elevation, exposition, soil, and vegetation, but differed in weed control. Ranch A controlled weeds manually, and ranch B controlled unwanted vegetation with applications of the herbicide Tordon(R)101M. The main species recovered on each ranch (Ataenius apicalis) was significantly more abundant at ranch A than at ranch B. Conversely, similar numbers of a second species, Ataenius sculptor, were recovered from both ranches. Three lines of evidence support the tentative conclusion that herbicide applications may be causing a decline in populations of A. apicalis on ranch B. First, the greatest reductions of A. apicalis were observed during periods of herbicide application. Second, A. sculptor, apparently little affected by these same herbicide applications, is active primarily during months without herbicide applications. Third, preliminary results of laboratory studies show that exposure to herbicide can impair reproductive function of the dung beetle Canthon cyanellus. (C) 2001 Academie des Sciences/Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Veracruz PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Biology;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0764-4469 UR - ISI:000172159700003 L2 - neotropical pasture;weed control;herbicide;2,4-D;Tordon((R));mortality;sterility;Scarabaeidae;2,4-D SO - Comptes Rendus de l Academie des Sciences Serie Iii-Sciences de la Vie-Life Sciences 2001 ;324(11):989-994 3595 UI - 14439 AU - Martinez MI AU - Deloya C AU - Dellacasa M AD - Inst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoInst Ecol AC, Dept Entomol, Xalapa 91000, Veracruz, MexicoUniv Pisa, Museo Storia Nat & Terr, I-56011 Calci, PI, ItalyMartinez, MI, Inst Ecol AC, Dept Ecol & Comportamiento Anim, Apartado 63, Xalapa 91000, Veracruz, Mexico TI - Anatomical and functional data on female and male reproductive systems of some dung beetle species of Aphodiinae and Eupariinae of Mexico (Coleoptera : Scarabaeoidea : Aphodiidae) AB - Female and male reproductive systems of two species of Aphodiinae, Aphodius opisthius and Cephalocyclus hogei, as well as of one species of Eupriinae, Ataenius apicalis are described. Comparisons are then made between 11 species of both subfamilies. The reproductive systems of both sexes of Aphodiinae and Eupariinae are similar, but there are differences between species of the two Aphodiinae genera and between the two subfamilies. In females, ovarioles number in each ovary varies among species. The genital chamber of Aphodius and Ataenius is similar, but seems different in Cephalocyclus. The spermathecae are variable according to species. The spermathecal duct and spermathecal glandular duct originates in the same place in Aphodius, but not in Ataenius and Cephalocyclus. Males of Aphodius have a, Cephalocyclus have 6, and Ataenius have 2 testicular follicles. The seminal vesicle only is present in Cephalocyclus. The glandular reservoirs are similar in Aphodius and Cephalocyclus, but differentet in Ataenius. The anterior part of ejaculatory duct and the internal sac differ among species of the two subfamilies. The preputial ventral gland only is present in Aphodius and Cephalocyclus MH - Italy MH - Mexico|Veracruz PB - WASHINGTON: ENTOMOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 0013-8797 UR - ISI:000166578500019 L2 - Aphodius;Cephalocyclus;Ataenius;females;males;anatomy;spermatophore;SCARABAEIDAE SO - Proceedings of the Entomological Society of Washington 2001 ;103(1):227-248 3596 UI - 14160 AU - Martinez R AU - Mendoza S AU - Reguera E AU - Ortiz P AU - Martinez JD AD - Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, MexicoUniv La Habana, IMRE, Fac Chem, Habana 10400, CubaMartinez, R, Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Legaria 694 Col Irrigac, Mexico City 11500, DF, Mexico TI - Kinetic approach to nixtamalization of corn pericarp AB - The nixtamalization of the pericarp isolated from grains of corn was studied with 2, 5, 10, 20 and 40% Ca(OH)(2) based upon the mass of the pericarp. For 2 and 5% Ca(OH)(2) a small loss of the mass of the pericarp takes place quickly which is accompanied by an abrupt fall of the concentration of the OH- ions. A suitable kinetic model for the decrease of the mass of the pericarp is a two phases exponential equation. The second phase is the slowest and it depends on the quantity of Ca(OH)(2) employed MH - Cuba MH - Mexico|Distrito Federal PB - ST PAUL: AMER ASSOC CEREAL CHEMISTS RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0009-0352 UR - ISI:000167387800001 L2 - DIETARY FIBER; DELIGNIFICATION SO - Cereal Chemistry 2001 ;78(2):107-110 3597 UI - 12854 AU - Marziani P AU - Sulentic JW AU - Zwitter T AU - Dultzin-Hacyan D AU - Calvani M AD - Osserv Astron Padova, I-35122 Padua, ItalyUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAUniv Ljubljana, Dept Phys, SI-1000 Ljubljana, SloveniaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoMarziani, P, Osserv Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy TI - Searching for the physical drivers of the Eigenvector 1 correlation space AB - We recently discussed an Eigenvector 1 (E1) parameter space that provides optimal discrimination between the principal classes of broad-line active galactic nuclei (AGNs). In this paper we begin a search for the most important physical parameters that are likely to govern correlations and data point distribution in E1 space. We focus on the principal optical parameter plane involving the width of the H beta broad component [FWHM(H beta (BC))] and the equivalent width ratio between the Fe II blend at 4570 Angstrom and H beta (BC) We show that the observed correlation for radio-quiet sources can be accounted for if it is Hb BC. primarily driven by the ratio of AGN luminosity to black hole mass (L/M proportional to Eddington ratio) convolved with source orientation. L/M apparently drives the radio-quiet correlation only for FWHM(H beta) less than or similar to 4000 km s(-1), which includes narrow-line Seyfert 1 galaxies and can be said to define an AGN "main sequence." Source orientation plays an increasingly important role as FWHM(H beta (BC)) increases. We also argue that AGNs lying outside the radio-quiet main sequence, and specifically those with optical Fe II much stronger than expected for a given (H beta (BC)), may all be broad absorption line QSOs MH - Italy MH - Mexico|Distrito Federal MH - Slovenia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000171001900009 L2 - line : formation;line : profiles;quasars : emission lines;quasars : general;ACTIVE GALACTIC NUCLEI; FE-II-EMISSION; LINE SEYFERT-1 GALAXIES; QUASARS; QSO; VARIABILITY; STARBURST; REGION SO - Astrophysical Journal 2001 ;558(2):553-560 3598 UI - 13283 AU - Mas J AU - Puig H AD - Univ Nacl Autonoma Mexico, Inst Geog, Mexico City 01000, DF, MexicoUniv Toulouse 3, Lab Ecol Terr, Unite Mixte Rech 5552, CNRS, F-31029 Toulouse 4, FranceMas, J, Univ Nacl Autonoma Mexico, Inst Geog, Circuito Exterior,Ciudad Univ,AP 20-850, Mexico City 01000, DF, Mexico TI - Deforestation methods in southwestern Campeche (Mexico) AB - The analysis of satellite images shows an important reduction of forest cover in the Lagoon of Terminos region in the State of Campeche (southeastern Mexico) over the last decades. Deforestation rates reached 2.2 and 5.3%, respectively, on a yearly basis during 1974-1986 and 1986-1991. The deforestation process was modelled using a geographic information system. The model allows to determine how elements such as roads or human settlements proximity, land tenure, shape of the forest patches, slope, soil type, and human population attributes have an impact on the deforestation process. Deforestation was more severe in opened, nonflooded areas, with fertile soil, near roads and human settlements. Human population attributes showed little influence on deforestation rates, probably because pasture lands encroachment was recognized as the main cause of forest clearing. However, the model does not highlight the root causes of this phenomena, such as government policy on settlement and subsidies for cattle ranching. Despite this limitation, it allows to generate deforestation risk assessment maps that correctly identify the forest areas most susceptible to deforestation MH - France MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 4 U4 - Forestry U5 - J;Article AV - French IS - 0045-5067 UR - ISI:000169869500018 L2 - RATES SO - Canadian Journal of Forest Research-Revue Canadienne de Recherche Forestiere 2001 ;31(7):1280-1288 3599 UI - 13090 AU - Mascaraque A AU - de la Garza LM AU - Michel EG AD - Univ Autonoma Madrid, Inst Ciencia Mat Nicolas Cabrera, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Lab Ensenada, Ensenada 22800, Baja California, MexicoMascaraque, A, Univ Autonoma Madrid, Inst Ciencia Mat Nicolas Cabrera, Dept Fis Mat Condensada, Cra Colmenar Viejo Km 15, E-28049 Madrid, Spain TI - Electronic structure and reactivity of the Co/MoS2(0001) interface AB - The electronic structure and the surface reactivity of Co deposited on MoS2(0001) has been investigated using angle-resolved photoemission spectroscopy. After depositing similar to1 NIL Co, the surface becomes metallic. The interface is nonreactive at room temperature. Besides the observation of an electronic band due to Co d electrons, the only significant modification of the surface electronic structure after Co deposition, is an overall shift of similar to0.7 eV due to the formation of a Schottky barrier. The interface was annealed to increasingly higher temperatures. It remains unreactive up to 800 K. Above this temperature. the Co-induced intensity diminishes, and further changes are detected in the valence band, signaling partial reaction with the substrate. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000170302100111 L2 - surface electronic phenomena (work function, surface potential, surface states. etc.);cobalt;magnetic films;sulphides;RAY PHOTOELECTRON-SPECTROSCOPY; MOS2(0001) SURFACE; CHEMICAL INTERACTION; MOS2; ADSORPTION; FILMS; FE SO - Surface Science 2001 ;482():664-668 3600 UI - 12026 AU - Mascaro M AU - Seed R AD - Univ Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Anglesey, WalesMascaro, M, UNAM, Fac Ciencias, Lab Biol Marina Exptl, Dept Biol, Apdo Post 69, Campeche, Mexico TI - Foraging behavior of juvenile Carcinus maenas (L.) and Cancer pagurus L AB - Information concerning the way juvenile crabs choose their diet from a variety of prey types can be useful for a better understanding of community dynamics, as well as for the adequate management of natural resources. Prey size and species selection by juvenile Carcinus maenas (15-35 mm carapace width, CW) and Cancer pagurus (20-40 mm CW) feeding on four bivalves of contrasting shell morphology were investigated. When offered a wide size range of Mytilus edulis, Ostrea edulis, Crassostrea gigas, and Cerastoderma edule presented individually, crabs generally showed evidence of size-selective predation. Cancer pagurus selected larger mussels relative to the size of their chelae (relative prey size, RPS) than did Carcinus maenas of similar and even larger carapace width, However, the RPS of selected O. edulis and Cerastoderma edule were similar for all crabs, suggesting that certain prey features constitute effective barriers even to the powerful chelae of Cancer pagurus. When offered a wide size range of mussels and oysters simultaneously, all crabs consistently selected mussels. When offered O. edulis and Crassostrea gigas, crabs consumed both these oyster species in similar numbers. Carcinus maenas consumed similar numbers of mussels and cockles; Cancer pagurus, however, showed no preference for either prey in the smaller size classes but selected more mussels than cockles as prey increased in size. Although previous studies report that adult Carcinus maenas select prey species according to their profitability (amount of food ingested per unit of handling time, milligrams per second), consumption rates of the size classes of prey selected by juvenile shore crabs did not always parallel prey value. Although variations in crab strength can account for many of the differences between the foraging strategy of juvenile and adult C. maenas, our results suggest that juvenile crabs are less species selective than adults as a result of the restrictions imposed on small individuals that have limited access to larger prey MH - Mexico|Campeche MH - United Kingdom PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000173168700013 L2 - SELECTIVE PREDATION; CRAB PREDATION; TROPICAL CRAB; PREY DENSITY; BIVALVE PREY; SHORE CRABS; SIZE; CRUSTACEA; GROWTH; CLAMS SO - Marine Biology 2001 ;139(6):1135-1145 3601 UI - 13229 AU - Mascaro M AU - Seed R AD - Univ Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Anglesey, WalesMascaro, M, UNAM, Fac Ciencias, Dept Biol, Lab Biol Marina Expt, Apdo Post 69, Cd Del Carmen, Campeche, Mexico TI - Choice of prey size and species in Carcinus maenas (L.) feeding on four bivalves of contrasting shell morphology AB - Experiments were designed to investigate selective predation by medium (40-55 mm carapace width: CW) and large (55-70 mm CW) Carcinus maenas when feeding on four bivalves of contrasting shell morphology. Size-selection was examined by presenting individual crabs with a wide size range of Mytilus edulis, Ostrea edulis, Crassostrea gigas and Cerastoderma edule. Medium-sized crabs preferred mussels 5-15 mm shell length (maximum shell dimension: SL) and cockles 5-10 mm SL, whereas large crabs preferred mussels 15-25 mm and cockles 10-20 mm SL. Crabs generally showed no preference for any particular size of either oyster species. Species-selection was examined by presenting individual crabs with paired combinations of the four bivalves in various proportions. When offered mussels and oysters simultaneously, both size categories of crabs consistently selected mussels, and food choice was independent of prey relative abundance. By contrast, C. maenas selected mussels and cockles as expected by the frequency in which each size category of crab encountered the preferred size ranges of prey. Crab preference clearly paralleled the rank order of prey profitability, which in turn was mainly determined by prey biomass, suggesting that active selection takes place at some point of the predation cycle. Experiments with epoxy resin models showed that initial reluctance of crabs to attack oysters was not associated with the ultimate energy reward. Moreover, they suggest that foraging decisions are partly based on evaluations of overall prey shape and volume, and that the minimum dimension of the shell constitutes an important feature which crabs recognise and associate with prey value MH - Mexico|Campeche MH - United Kingdom PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000170059800017 L2 - foraging behaviour;Carcinus maenas;selective predation;bivalve;CALLINECTES-SAPIDUS RATHBUN; OPTIMAL FORAGING THEORY; BLUE-CRAB; BEHAVIORAL MECHANISMS; CHESAPEAKE BAY; MOLLUSCAN PREY; SHORE CRAB; SELECTION; PREDATION; MUSSELS SO - Hydrobiologia 2001 ;449(1-3):159-170 3602 UI - 12857 AU - Masciadri E AU - Jabouille P AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoMeteo France, Ctr Natl Rech Meteorol, F-31057 Toulouse, FranceMasciadri, E, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Improvements in the optical turbulence parameterization for 3D simulations in a region around a telescope AB - In preceding papers we have presented comparisons between simulated and measured C-N(2) profiles above two of the best astronomical sites: Cerro Paranal (Chile) (Masciadri et al. 1999a; Masciadri et al. 1999b) and Roque de los Muchachos (Canary Islands) (Masciadri et al. 2001a). These works aimed at validating the atmospheric model Meso-Nh which was conceived to simulate classical atmospheric parameters and was then adapted to simulate optical turbulence (3D maps of C-N(2)). Good results were obtained but further improvements can be made. One of the principal limitations is the statistical reliability of the model that is, at the present time, not very high. In this paper we present some modifications introduced in the optical turbulence parameterization of the model that aim to reduce some systematic errors. Preliminary results, obtained comparing the simulations with measurements taken at the San Pedro Martir site (Mexico) in March-April 1997, show that we are now able to obtain a better qualitative and quantitative estimate of the C-N(2) profiles. Finally, we show how we have been able to improve the spatiotemporal variability of the model MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171086800039 L2 - atmospheric effects;methods : numerical;ATMOSPHERIC NUMERICAL-MODEL; LARGE-EDDY SIMULATION; BOUNDARY-LAYER SO - Astronomy & Astrophysics 2001 ;376(2):727-734 3603 UI - 14294 AU - Masciadri E AU - Vernin J AU - Bougeault P AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nice, CNRS, UMR 6525 Astrophys, F-06108 Nice 2, FranceCtr Natl Rech Meteorol Meteo France, F-31057 Toulouse, FranceMasciadri, E, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - 3D numerical simulations of optical turbulence at the Rogue de Los Muchachos Observatory using the atmospherical model Meso-Nh AB - We show results obtained from simulations of the optical turbulence (OT), provided by the atmospheric non-hydrostatic Meso-Nh model applied to the astronomical site of Rogue de Los Muchachos (RLM) in the Canary Islands. The validation of the numerical technique is done comparing simulated and measured C-N(2) profiles obtained by different instruments operating during the same observation campaign of 11 nights. The results of this study show, for each night, a good average estimation of the OT obtained with Meso-Nh, compared to the dispersion of measurements from the different instruments. For the first time, the contribution to the optical turbulence of the radiation of the ground was studied. Quantitative estimations are given of the ability of the model to simulate the temperature near the ground around the telescope. Moreover, a set of 3D simulations shows that the horizontal distribution of the optical turbulence is not necessarily uniform, especially in the first 10 km above the ground. Finally, a study of the optimization of the optical turbulence parameterization in the model code is presented MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000166998100032 L2 - atmospheric turbulence;numerical model;seeing;site testing;flexible scheduling;LAYER; DOME SO - Astronomy and Astrophysics 2001 ;365(3):699-708 3604 UI - 12716 AU - Masi AT AU - King JR AU - Burgos-Vargas R AD - Univ Illinois, Coll Med, Dept Med, Peoria, IL 61656, USATEAM, Res, Tamworth, NSW, AustraliaHosp Gen Mexico City, Rheumatol Unit, Mexico City 06726, DF, MexicoMasi, AT, Univ Illinois, Coll Med, Dept Med, 1 Illini Dr,Box 1649, Peoria, IL 61656 USA TI - Novel concepts of severity mechanisms in ankylosing spondylitis MH - Australia MH - USA MH - Mexico|Distrito Federal PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 3 U4 - Rheumatology U5 - J;Editorial Material AV - English IS - 0315-162X UR - ISI:000171401400003 L2 - JUVENILE-ONSET; SERONEGATIVE ENTHESOPATHY; RHEUMATOID-ARTHRITIS; PREDICTIVE FACTORS; DISEASE; SPONDYLOARTHROPATHIES; ARTHROPATHY; CHILDREN; SEX SO - Journal of Rheumatology 2001 ;28(10):2151-2154 3605 UI - 12445 AU - Maspero JF AU - Duenas-Meza E AU - Volovitz B AU - Daza CP AU - Kosa L AU - Vrijens F AU - Leff JA AD - Univ Buenos Aires, Allergy & Immunol Unit, Buenos Aires Childrens Hosp Ricardo Gutierrez, Buenos Aires, DF, ArgentinaFdn Santafe de Bogota, Bogota, ColombiaSchneider Childrens Hosp, Petah Tiqwa, IsraelHosp Gen Ctr Med La Raza, IMSS, Mexico City, DF, MexicoPediat Inst Svabhegy, Budapest, HungaryMerck & Co Inc, Whitehouse Stn, NJ, USAMaspero, JF, Univ Buenos Aires, Allergy & Immunol Unit, Buenos Aires Childrens Hosp Ricardo Gutierrez, Buenos Aires, DF, Argentina TI - Oral montelukast versus inhaled beclomethasone in 6-to 11-year-old children with asthma: Results of an open-label extension study evaluating long-term safety, satisfaction, and adherence with therapy AB - This 6-month, open-label extension study of a previously described base study compared oral montelukast with inhaled beclomethasone in terms of safety, forced expiratory volume in one second (FEV1) measurements, parent and patient satisfaction with treatment, asthma-related medical resource utilization, school absenteeism, and parental work loss in children with asthma. A total of 124 of 266 asthmatic children, 6 to 11 years of age, who enrolled in the base study entered a 6-month open-label extension study (74 boys, 50 girls) and were re-randomized (2:1 ratio) to receive once-daily oral montelukast (n = 83) or inhaled beclomethasone 100 mcg three times daily = 41). Children were evaluated in the clinic prior to re-randomization (Month 0) and at regular visits at 1, 3, and 6 months. Children and their parents showed a significantly higher overall satisfaction for montelukast at 6 months than for inhaled beclomethasone (p = 0.001 and p < 0.05, respectively). According to parents, montelukast was more convenient (p < 0.001), less difficult to use (p = 0.005), and was used as instructed more of the time (p = 0.006) compared with beclomethasone. Oral corticosteroid use was similar in the montelukast (13% of patients) and beclomethasone (17%) treatment groups. The montelukast treatment group was more adherent with their regimen than the inhaled beclomethasone treatment group; almost twice as many children on montelukast compared with inhaled beclomethasone were highly compliant (82% versus 45%). The two study groups were similar with respect to overall safety, change in FEV1, asthma-related medical resource utilization, school absenteeism, and parental work loss. Montelukast represents a safe and effective asthma treatment regimen to which children with asthma are more likely to adhere MH - Argentina MH - Colombia MH - Hungary MH - Israel MH - Mexico|Distrito Federal MH - USA PB - NEWBURY: LIBRAPHARM RP - NOT IN FILE U3 - TC 27 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0300-7995 UR - ISI:000172019800004 L2 - montelukast;singulair;asthma;leukotriene receptor antagonists;beclomethasone;satisfaction;compliance and adherence;LEUKOTRIENE-RECEPTOR ANTAGONIST; EXERCISE-INDUCED BRONCHOCONSTRICTION; DOUBLE-BLIND TRIAL; 14-YEAR-OLD CHILDREN; PLACEBO; MULTICENTER; NO SO - Current Medical Research and Opinion 2001 ;17(2):96-104 3606 UI - 12551 AU - Masterlark T AU - DeMets C AU - Wang HF AU - Sanchez O AU - Stock J AD - Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706, USACALTECH, Seismol Lab, Pasadena, CA 91125, USAUNAM, Inst Geofis, Mexico City, DF, MexicoMasterlark, T, Raytheon ITSS Corp, USGS, EROS Data Ctr, Sioux Falls, SD USA TI - Homogeneous vs heterogeneous subduction zone models: Coseismic and postseismic deformation AB - A finite-element model (FEM) incorporating geologic properties characteristic of a subduction zone is compared with FEMs approximating homogeneous elastic half-spaces (HEHS)s to investigate the effect of heterogeneity on coseismic and postseismic deformation predictions for the 1995 Colima-Jalisco M-w=8.0 earthquake. The FEMs are used to compute a coefficient matrix relating displacements at observation points due to unit dislocations of contact-node pairs on the fault surface. The Green's function responses are used to solve the inverse problem of estimating dislocation distributions from coseismic GPS displacements. Predictions from the FEM with heterogeneous material properties, loaded with either of the HEHS dislocation distributions, significantly overestimate coseismic displacements. Postseismic deformation predictions are also sensitive to the coseismic dislocation distribution, which drives poroelastic and viscoelastic relaxation. FEM-generated Green's functions, which allow for spatial variations in material properties, are thus preferable to those that assume a simple HEHS because the latter leads to dislocation distributions unsuitable for predicting the postseismic response MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 11 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000171780000009 L2 - HALF-SPACE; EARTHQUAKE; JALISCO; MEXICO; RIVERA SO - Geophysical Research Letters 2001 ;28(21):4047-4050 3607 UI - 13171 AU - Mata R AU - Martinez E AU - Bye R AU - Morales G AU - Singh MP AU - Janso JE AU - Maiese WM AU - Timmermann B AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoWyeth Ayerst Res, Nat Prod Res, Pearl River, NY 10965, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Arizona, Coll Pharm, Tucson, AZ 85721, USAMata, R, Univ Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, Mexico TI - Biological and mechanistic activities of xanthorrizol and 4-(1 ',5 '-dimethylhex-4 '-enyl)-2-methylphenol isolated from Iostephane heterophylla AB - Xanthorrizol (1) and 4-(1',5'-dimethylhex-4'-enyl)-2-methylphenol (2) were identified as the principal antimicrobial components of a CH2Cl2-MeOH (1:1) extract derived from Iostephane heterophylla. Compound 2 is a new natural product, but has been synthesized. Both compounds exhibited low level activity (MICs of 16-32 mug/mL) against methicillin-resistant staphylococci and vancomycin-resistant enterococci. They were either inactive or poorly active against Gram-negative bacteria and yeast. Mechanistic studies performed in Escherichia coli imp suggested nonspecific inhibition of DNA, RNA, and protein synthesis by both of these compounds. Compound I was tested in an in vivo model; it did not provide protection to mice infected with Staphylococcus aureus MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000170205900013 L2 - XANTHORRHIZOL; ANTIBACTERIAL; CONSTITUENTS; GLYCOSIDE; PLANTS; ROOTS SO - Journal of Natural Products 2001 ;64(7):911-914 3608 UI - 13402 AU - Mathelitsch L AU - Garcilazo H AD - Graz Univ, Inst Theoret Phys, A-8010 Graz, AustriaInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoMathelitsch, L, Graz Univ, Inst Theoret Phys, Univ Pl 5, A-8010 Graz, Austria TI - The interplay of pi N states in elastic pi d scattering AB - The off-shell behavior of the P-11 piN State has an important influence on observables of elastic nd scattering. This influence is largest at the resonance of the P-33 partial wave MH - Austria MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000169396200056 L2 - PARAMETRIZATION; OBSERVABLES; RESONANCE SO - Nuclear Physics A 2001 ;689(1-2):410C-413C 3609 UI - 12702 AU - Mathew X AU - Arizmendi JR AU - Campos J AU - Sebastian PJ AU - Mathews NR AU - Jimenez CR AU - Jimenez MG AU - Silva-Gonzalez R AU - Hernandez-Torres ME AU - Dhere R AD - UNAM, Ctr Invest Energia, Solar Mat Dept, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoNREL, Natl Ctr Photovolta, Golden, CO 80401, USAMathew, X, UNAM, Ctr Invest Energia, Solar Mat Dept, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Shallow levels in the band gap of CdTe films deposited on metallic substrates AB - CdTe thin films were developed on flexible metallic substrates using close spaced sublimation and electrodeposition techniques. The films were nearly stiochiometric, highly uniform and exhibit good crystallinity. The films were characterized using XRD, SEM and AUGER. The shallow levels in the band gap of CdTe were determined using photoluminescence and photoinduced current transient spectroscopy. The photoluminescence studies revealed a defect dominated CdTe surface. The two lines detected at 1.587 and 1.589eV at 15 K are assigned to the donor levels associated with Cl at the Te sites. The additional features observed in the photoluminescence spectra of the CdCl2 treated films revealed that the CdCl2 treatment improves the quality of the films and the close space sublimated films are better than the electrodeposited films. The photoinduced current transient spectroscopic technique was effectively used to identify the electron and hole traps. Two shallow levels with activation energy 0.056 and 0.13 eV were detected and assigned to electron and hole traps, respectively. (C) 2001 Elsevier Science BN. All rights reserved MH - Mexico|Morelos MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000171361800014 L2 - CdTe;electrodeposition;close space sublimation;PICTS;photoluminescence;Schottky devices;CURRENT TRANSIENT SPECTROSCOPY; THIN-FILMS; ELECTRODEPOSITED CDTE; PHOTO-LUMINESCENCE; CADMIUM TELLURIDE; PHOTOLUMINESCENCE; SPECTRUM SO - Solar Energy Materials and Solar Cells 2001 ;70(3):379-393 3610 UI - 12612 AU - Matson DO AU - Szabo S AU - Afflerbach C AU - Campos F AU - Pickering LK AU - Ruiz-Palacios G AD - Eastern Virginia Med Sch, Ctr Pediat Res, Childrens Hosp Kings Daughters, Norfolk, VA 23501, USAEastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23501, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - Sequence differences of rotavirus (RV) NSP4 gene sequences between human symptomatic and asymptomatic first infections MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000171226900323 SO - Clinical Infectious Diseases 2001 ;33(7):1139-1139 3611 UI - 12929 AU - Matsumoto Y AU - Yu ZR AD - IPN, CINVESTAV, Dept Elect Engn, Mexico City 07360, DF, MexicoNankai Univ, Inst Photoelectron, Tianjin, Peoples R ChinaMatsumoto, Y, IPN, CINVESTAV, Dept Elect Engn, 2508 Col Zacatenco, Mexico City 07360, DF, Mexico TI - P-type polycrystalline Si films prepared by aluminum-induced crystallization and doping method AB - P-type polycrystalline silicon films were prepared by aluminum-induced crystallization and doping. The starting material was hydrogenated amorphous silicon prepared by plasma-enhanced chemical vapor deposition on glass substrates. An aluminum layer with a different thickness was evaporated on the a-Si:H. Conventional thermal annealing was performed for crystallization. X-ray diffraction and secondary ion mass spectroscopy measurements were used to study the structural change and the Al profile in the films. Resistivity, Hall mobility, carrier concentration and spectral optical transmittance were measured to evaluate the electrical and optical properties of the films. Results showed that poly-Si films could be obtained by annealing a-Si:H films at 450 to 550 degreesC for 5 to 60 min. In spite of a relatively high oxygen impurity content in the films, they are p-type, with low resistivity, high Hall mobility and carrier concentration of 0.06 (Omega .cm), 20 Cm-2/Vs and similar to 10(18) cm(-3), respectively. This technique has great potential for solar cell mass production using low-cost glass substrates MH - Mexico|Distrito Federal MH - Peoples R China PB - MINATO-KU TOKYO: INST PURE APPLIED PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-4922 UR - ISI:000170771700002 L2 - Al-induced crystallization;thermal annealing;polycrystalline silicon;X-ray diffraction;carrier concentration;optical transmittance;Hall mobility;HYDROGENATED AMORPHOUS-SILICON; SOLID-PHASE CRYSTALLIZATION; LOW-TEMPERATURES; A-SI; LAYERS SO - Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers 2001 ;40(4A):2110-2114 3612 UI - 12467 AU - Matsuura T AU - Fang P AU - Rasmussen A AU - Grewal RP AU - Alonso ME AU - Roa BB AU - Ashizawa T AD - Baylor Coll Med, Houston, TX 77030, USABaylor Coll Med, Baylor DNA Diagnost Lab, Houston, TX 77030, USAInst Nacl Neurol & Neurocirug, Dept Neurogenet, Mexico City, DF, MexicoJFK Med Ctr, New Jersey Neurosci Inst, Edison, NJ, USA TI - ATTCT repeat Instability in spinocerebellar ataxia type 10 (SCA10) MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648902770 SO - American Journal of Human Genetics 2001 ;69(4):652-652 3613 UI - 12098 AU - Matus SKA AU - Quintero L AU - Fourrey JL AU - Clivio P AD - Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, MexicoCNRS, Inst Chim Subst Nat, F-91190 Gif Sur Yvette, FranceQuintero, L, Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, Mexico TI - Diastereoselective synthesis of 5 R and 5 S TT pyrimidine h(5)(6-4) pyrimidone photoproducts; structural analogues of the mutagenic UV-induced TT (6-4) photolesion AB - Two pyrimidine (6-4) pyrimidone photoproduct derivatives, highly valuable to probe the substituent influence during polymerase replicative bypass, were prepared; one (1a) by diastereoselective Raney nickel reductive desulfurization of the s(5)(6-4) adduct of TpT (3) and the other (1b) by alkaline treatment of 1a MH - France MH - Mexico|Puebla PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000173044900012 SO - Chemical Communications 2001 ;(24):2550-2551 3614 UI - 12901 AU - Maupome G AU - Castano VM AD - Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76001, MexicoUniv Clin Dent British Columbia, Dept Oral Hlth Sci, Fac Dent, Vancouver, BC V6T 1Z3, CanadaCastano, VM, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 1-1010, Queretaro 76001, Mexico TI - Comparative electrochemical methods to determine fluoride traces in NaCl AB - Fluoridated salt is an effective method to reduce dental decay in the population at large, in particular in settings where the more frequently used method of fluoridated water is not feasible due to unreliable water supplies. A salient problem of regular dosage and monitoring of fluoride in salt is its variable level at the industrial level. To evaluate the relative advantages of the present monitoring method used in Mexico, samples of domestic fluoridated salt were analysed by two comparative methods to determine their fluoride content. One of the methods employed was the relevant Mexican Official Norm (based on an acetic acid, sodium chloride, trans-1,2-diamine, cyclohexane N,N,N ' ,N ' tetracetic acid buffer solution) and the other was an alternative electrochemical methodology (based on an acetic acid, sodium chloride, sodium citrate buffer solution). The cost of the chemicals involved and simplicity of the alternative method, along with the equivalent precision of its results, makes it an interesting choice for the large scale analysis of fluoridated salt. (C) 2001 AEHS MH - Canada MH - Mexico|Queretaro PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences U5 - J;Article AV - English IS - 1527-5922 UR - ISI:000170991600006 L2 - domestic salt;fluorides;caries;electrochemical methods;public health;prevention;CARIES PREVALENCE; SALT; EXCRETION; CHILDREN SO - Environmental Forensics 2001 ;2(3):201-203 3615 UI - 13775 AU - Mayne M AU - Grobert N AU - Terrones M AU - Kamalakaran R AU - Ruhle M AU - Kroto HW AU - Walton DRM AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoCEA Saclay, DRECAM, SPAM, F-91191 Gif Sur Yvette, FranceWalton, DRM, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Pyrolytic production of aligned carbon nanotubes from homogeneously dispersed benzene-based aerosols AB - Aligned multi-walled carbon nanotubes (30-130 mum long, 10-200 nm outer diameter) have been prepared in high yield by pyrolysing homogeneously dispersed aerosols generated from benzene/ferrocene solutions, at 800 degreesC or 950 degreesC, using a compressed gas (Ar) driven atomiser. Scanning electron microscopy (SEM) and TEM studies reveal the presence of carpet-like flakes containing high yields of partly filled carbon nanotubes. X-ray diffraction confirms the presence of graphite-like structures, alpha -Fe and Fe3C (cementite). Nanotube and filling yields were found to be temperature and ferrocene concentration dependent. The preparative method opens up new avenues for nanotube synthesis based upon hydrocarbon/catalyst solutions. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - France MH - Germany MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 79 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000168499100004 L2 - CATALYTIC PYROLYSIS; LARGE-SCALE; GROWTH; DECOMPOSITION; HYDROCARBONS; DEPOSITION; NANOWIRES; ACETYLENE; MIXTURES; BUNDLES SO - Chemical Physics Letters 2001 ;338(2-3):101-107 3616 UI - 12588 AU - Mayorga-Cruz D AU - Mel'nikov IV AD - Univ Autonoma Estado Morelos, Ctr Invest Ingn & ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaMayorga-Cruz, D, Univ Autonoma Estado Morelos, Ctr Invest Ingn & ciencias Aplicadas, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Kinetics of a solid-state laser with polarizable saturable absorber AB - In this work we present a numerical study of a three-level laser containing a polarizable saturable absorber inside the cavity. This model allows us to study the kinetics of solid-state lasers in a general form. The stability of Q-switching regime is analyzed by means of numerical solution of rate equations; and main results of our analysis let us suggest that under certain conditions, the laser may pass from unstable relaxation oscillations to a stable CW operation by changing the mutual orientation of the absorber and polarizer, or by choosing the pump level. (C) 2001 Optical Society of America MH - Mexico|Morelos MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000171694300001 L2 - OSCILLATOR; SWITCH; OUTPUT SO - Optics Express 2001 ;9(9):428-435 3617 UI - 13846 AU - Mayorga E AU - Solomons N AU - Valdez R AU - Vossenaar M AU - Anderson AS AD - CeSSIAM, Guatemala City, GuatemalaInst Perinatol, Mexico City, DF, MexicoUniv Dundee, Dundee, Scotland TI - Urbanization of the rural diet, or persistence of rural cuisine to the cities? Comparative observations on the food systems of low-income Guatemalans in the year 2000 MH - Guatemala MH - Mexico|Distrito Federal MH - United Kingdom PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167454201552 SO - Faseb Journal 2001 ;15(5):A983-A983 3618 UI - 12414 AU - Mayya YD AU - Korchagin V AD - Inst Nacl Astrofis Opt & Elect, Puebla, MexicoInst Phys, Rostov Na Donu, RussiaMayya, YD, Inst Nacl Astrofis Opt & Elect, Puebla, Mexico TI - Star-formation in ring galaxies: Multi-band observations MH - Mexico|Puebla MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900080 SO - Astrophysics and Space Science 2001 ;277():339-339 3619 UI - 12526 AU - Mazumdar A AU - Panda S AU - Perez-Lorenzana A AD - Abdus Salem Int Ctr Theoret Phys, I-34100 Trieste, ItalyHarish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, IndiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, Abdus Salem Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - Assisted inflation via tachyon condensation AB - In this paper we propose a new mechanism of inflating the Universe with non-BPS D4-branes which decay into stable D3-branes via tachyon condensation. In a single brane scenario the tachyon potential is very steep and unable to support inflation. However, if the universe lives in a stack of branes produced by a set of noninteracting unstable D4-branes, then the associated set of tachyons. may drive inflation along our 3 spatial dimensions. After tachyon condensation the Universe is imagined to be filled with a set of parallel stable D3-branes. We study the scalar density perturbations and reheating within this setup. (C) 2001 Elsevier Science B.V. All rights reserved MH - India MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 122 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000171842100004 L2 - COSMOLOGICAL IMPLICATIONS; SUBMILLIMETER DIMENSIONS; QUANTUM-GRAVITY; TEV; MODELS; COMPACTIFICATION; PHENOMENOLOGY; SUPERSYMMETRY; MILLIMETER; HIERARCHY SO - Nuclear Physics B 2001 ;614(1-2):101-116 3620 UI - 13494 AU - Mazumdar A AU - Perez-Lorenzana A AD - Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - A dynamical stabilization of the radion potential AB - Large extra-dimensional theories attempt to solve the hierarchy problem by assuming that the fundamental scale of the theory is at the electroweak scale. This requires the size of the extra dimensions to be stabilized at a scale which is determined by the effective four-dimensional Planck mass and the number of extra dimensions. In this Letter we concentrate upon the dynamical reasons to stabilize them by providing a running mass to the radion field. We show that it is possible to maintain the size of the extra dimensions once it is stabilized throughout the dynamics of inflation. (C) 2001 Published by Elsevier Science B.V MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000169254600016 L2 - LARGE EXTRA DIMENSIONS; QUANTUM-GRAVITY; SUBMILLIMETER DIMENSIONS; INFLATION; TEV; COLLIDERS; COSMOLOGY; PHENOMENOLOGY; PERTURBATION; CONSTRAINTS SO - Physics Letters B 2001 ;508(3-4):340-346 3621 UI - 12547 AU - mbriz-Perez H AU - Acha E AU - Fuerte-Esquivel CR AD - Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, ScotlandInst Tecnol Morelia, Dept Ingn Elect & Elect, Morelia, Michoacan, MexicoAmbriz-Perez, H, Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, Scotland TI - Closure to discussion of "Advanced SVC models for Newton-Raphson load flow and Newton optimal power flow studies" MH - Mexico|Michoacan MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Editorial Material AV - English IS - 0885-8950 UR - ISI:000171787000073 SO - Ieee Transactions on Power Systems 2001 ;16(4):947-948 3622 UI - 14405 AU - McAuliffe JR AU - Sundt PC AU - Valiente-Banuet A AU - Casas A AU - Viveros JL AD - Desert Bot Garden, Phoenix, AZ 85008, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoMcAuliffe, JR, Desert Bot Garden, 1201 N Galvin Pkwy, Phoenix, AZ 85008 USA TI - Pre-columbian soil erosion, persistent ecological changes, and collapse of a subsistence agricultural economy in the semi-arid Tehuacan Valley, Mexico's 'Cradle of Maize' AB - The cultivation of hillslopes in pre-Columbian times caused considerable soil erosion in the landscapes of the semi-arid Tehuacan Valley, south-central Mexico. A very severe episode of erosion of cultivated uplands occurred approximately 900 years ago in one drainage basin. The magnitude of soil erosion has left behind a degraded landscape with greatly decreased agricultural productivity and locally impoverished native flora. Hillslope soils in the basins studied are highly susceptible to erosion and neither pre-Columbian nor modem agricultural practices have proven to be sustainable in these upland environments. Severe soil loss that precedes agricultural collapse and land abandonment may impair the recovery of diverse and productive ecosystems for many hundreds to thousands of years, as this is the time required for the formation of a new, substantial soil mantle. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 6 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000166682100004 L2 - desertification;maize;Mexico;Quaternary geomorphology;soil erosion;sustainable agriculture;Tehuacan;YOUNGER-DRYAS; PLATEAU SO - Journal of Arid Environments 2001 ;47(1):47-75 3623 UI - 14067 AU - McDowell FW AU - Roldan-Quintana J AU - Connelly JN AD - Univ Texas, Dept Geol Sci, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Geol, Hermosillo 83000, Sonora, MexicoMcDowell, FW, Univ Texas, Dept Geol Sci, Austin, TX 78712, USA TI - Duration of Late Cretaceous-early Tertiary magmatism in east-central Sonora, Mexico AB - Late Cretaceous-early Tertiary are magmatism in east-central Sonora includes the Sonoran batholith and the volcanic rocks of the Tarahumara Formation. The Tarahumara Formation consists predominantly of propylitically altered andesitic to dacitic lava, agglomerate, and volcanic breccia, all of local derivation, along with subordinate felsic pyroclastic components. Relatively thin volcaniclastic intervals with intercalated freshwater limestone that contains Late Cretaceous plant fossils occur within the upper third of the formation. Six new U-Pb zircon ages from the Tarahumara Formation extend the known duration of Late Cretaceous-early Tertiary magmatism in east-central Sonora, Four of the samples yield ages between 73 and 70 Ma, and the other two are 90 and 89 Ma (errors are generally <1 m.y.). All of these ages are older than 65 to 55 Ma K-Ar and U-Pb ages for plutons of the Sonoran batholith in east-central Sonora determined in other studies, Combined, the ages indicate are magmatism over at least 35 m.y. Initiation of magmatism in eastern Sonora by 90 Ma is much earlier than predicted by regional trends, which are largely based on geochronology of plutons. It appears that a full history of the regional evolution of this magmatic art will require substantial age information from its volcanic rocks. A component of inherited zircon was detected in five of the six dated samples from the Tarahumara Formation. Although ages calculated from upper concordia intercepts are mostly imprecise, all are consistent with the presence of one or more Proterozoic components. In one sample, a persistent inherited component provided a precise upper-intercept age of 1448 Ma, These small cores surrounded by new zircon growth must represent material incorporated into the magma chamber prior to eruption. The results record the presence of Laurentian basement 200 km south and east of known outcrops in Sonora MH - Mexico|Sonora MH - USA PB - COLLEGE STN: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000167693800008 L2 - geochronology;Late Cretaceous;magmatism;Sonora Mexico;U-Pb;zircon;EVOLUTION; DEPOSITS; MINERALIZATION; SEDIMENTARY; EXTENSION; LARAMIDE; CANANEA SO - Geological Society of America Bulletin 2001 ;113(4):521-531 3624 UI - 12504 AU - Mchugh DJ AU - Hernandez-Carmona G AU - Luz Arvizu-Higuera D AU - Rodriguez-Montesinos YE AD - Ctr Interdisciplinario Ciencias Marinas, La Paz, BCS, MexicoUniv New S Wales, Australian Def Force Acad, Univ Coll, Sch Chem, Canberra, ACT 2600, AustraliaHernandez-Carmona, G, Ctr Interdisciplinario Ciencias Marinas, Ap Postal 592, La Paz, BCS, Mexico TI - Pilot plant scale extraction of alginates from Macrocystis pyrifera - 3. Precipitation, bleaching and conversion of calcium alginate to alginic acid AB - Three steps of the alginate production process were studied at pilot plant level. The effect of the amount of calcium chloride used during the precipitation was measured in terms of filtration time of the precipitated calcium alginate. Three different proportions of calcium chloride per gram of alginate were tested. The best proportion used was 2.2 parts of calcium chloride per one part of alginate, yielding a filtration rate of 97.9 L min(-1) on a screen area of 1.32 m(2). The method of adding the solutions and the degree of mixing are discussed as other factors affecting the precipitation step. The effect of bleaching the calcium alginate with sodium hypochlorite (5%) was studied. Seven proportions, ranging from 0 to 0.77 mL of sodium hypochlorite per gram of sodium alginate were tested. The effect of hypochlorite was compared for alginates with three different viscosities. Using alginates with medium viscosity (300-500 mPa s), the best proportion was 0.4 mL hypochlorite per gram of alginate, yielding an alginate of light cream color with 20% less viscosity than the control. Alginates with lower viscosity showed a smaller loss of viscosity. The effect of pH during conversion of calcium alginate to alginic acid was determined using four combinations of pH, ranging from 2.2 to 1.6, in three acid washings. The extent of conversion was determined by measuring the percent reduction of the alginate viscosity (RV) in 1% solution before and after adding a sequestrant of calcium. When a pH 1.8 or 1.6 was used for each washing, only two washings were necessary to produce a RV lower than 40% (maximum recommended). The use of pH 2 required three acid washings to produce the same effect. The pH 2.2 did not remove enough calcium, even with three washings, the RV of the resulting sodium alginate being greater that 40%. The results of these experiments provide the information that producers need when deciding the best parameters to obtain a product with the desired characteristics MH - Australia MH - Mexico|Baja California Sur PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0921-8971 UR - ISI:000171944600002 L2 - alginate;alginic acid;bleaching;Macrocystis pyrifera;pilot plant process;precipitation SO - Journal of Applied Phycology 2001 ;13(6):471-479 3625 UI - 12582 AU - Mckane AJ AU - Vazquez F AD - Univ Manchester, Dept Theoret Phys, Manchester M13 9PL, Lancs, EnglandUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoMcKane, AJ, Univ Manchester, Dept Theoret Phys, Manchester M13 9PL, Lancs, England TI - Fluctuation dissipation theorems and irreversible thermodynamics AB - We investigate the statistics of fluctuations in macroscopic systems described by thermodynamics. We begin by reviewing fluctuations in the context of linear irreversible thermodynamics and show that a more direct characterization of the fluctuations is possible, if velocity fluctuations are explicitly included in the second variation of the entropy, delta S-2, about the equilibrium state. A similar procedure is then applied to what is the main goal of this paper: elucidating the nature of fluctuations in hyperbolic macroscopic systems, where signals have a finite transmission velocity. We find that, once again, velocity fluctuations have to be explicitly included, which takes us outside of extended irreversible thermodynamics as it is often defined. We find the explicit form of the fluctuation-dissipation theorem in this case, and determine the statistics of the stochastic variables in terms of the quantities appearing in the deterministic dynamics. The fluctuating theory is then reformulated in order to elucidate the relationship between the extended theory and linear irreversible thermodynamics. This has the effect of bringing out the general structure more clearly: the real, frequency-independent transport coefficients of linear irreversible thermodynamics are replaced by their complex, frequency-dependent counterparts in the extended theory MH - United Kingdom MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171649100027 L2 - NONEQUILIBRIUM THERMODYNAMICS; LOCAL EQUILIBRIUM; SYSTEMS; ENTROPY SO - Physical Review e 2001 ;6404(4): 3626 UI - 12977 AU - Mcleod JG AU - Pfeiffer WH AU - Depauw RM AU - Clarke JM AD - Agr & Agri Food Canada, Res Branch, Semiarid Prairie Agr Res Ctr, Swift Current, SK S9H 3X2, CanadaInt Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoMcLeod, JG, Agr & Agri Food Canada, Res Branch, Semiarid Prairie Agr Res Ctr, POB 1030, Swift Current, SK S9H 3X2, Canada TI - Registration of 'AC Ultima' spring triticale MH - Canada MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170696200052 SO - Crop Science 2001 ;41(3):924-925 3627 UI - 13710 AU - McQuirter JL AU - Rothenberg SJ AU - Dinkins GA AU - Manalo M AU - Kondrashov V AU - Todd AC AD - Charles R Drew Univ Med & Sci, Dept Oral & Maxillofacial Surg, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Surg, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Anesthesia, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Drew Environm Toxicol Lab, Los Angeles, CA 90059, USAKing Drew Med Ctr, Los Angeles, CA, USANatl Publ Hlth Inst, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoMt Sinai Sch Med, Dept Community & Prevent Med, New York, NY, USAMcQuirter, JL, Charles R Drew Univ Med & Sci, Dept Oral & Maxillofacial Surg, 1731 E 120th St, Los Angeles, CA 90059 USA TI - The effects of retained lead bullets on body lead burden AB - Background: Numerous case reports have demonstrated that lead poisoning with potentially fatal consequences can result from retained lead projectiles after firearm injuries, To assess the impact of retained projectiles on subsequent lead exposure in the population, one cannot rely on self-selected cases presenting with symptoms of lead intoxication. This preliminary study seeks to identify increased lead burden and identify risk factors of elevated blood lead levels for individuals with retained lead bullets. Methods: Forty-eight patients were originally recruited from gunshot victims presenting for care at the King/Drew Medical Center in Los Angeles, California. An initial blood level was measured for all recruited patients and repeated for the 28 participants available for follow-up, 1 week to 8 months later. Medical history, including a history of prior firearm injuries and other retained projectiles, was taken, along with a screening and risk factor questionnaire to determine other sources of lead (occupational/recreational) to which the patient might have been, or is at present, exposed, The participants also had K-shell x-ray fluorescence determinations of bone lead in the tibia and calcaneus in order to determine past lead exposures not revealed by medical history and risk factor questionnaire. Multivariate models of blood level were made using risk factor and bone lead concentration data. Results: We demonstrated that blood lead tends to increase with time after injury in patients with projectile retention, and that the increase in significant part depended on the presence of a bone fracture caused by the gunshot, Conclusion: We encountered evidence suggesting that the amount of blood lead increase in time after injury is also dependent on the tibia lead concentration, There were too few cases in the study to fully test the effects of bullet location, or the interaction of bullet location with bone fracture or bullet fragmentation MH - USA MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Critical Care Medicine;Surgery U5 - J;Article AV - English IS - 0022-5282 UR - ISI:000168732500028 L2 - lead bullets;blood lead;bone lead;gunshot wound;firearm injury;complication;IN-VIVO MEASUREMENTS; X-RAY-FLUORESCENCE; BLOOD LEAD; BONE LEAD; OCCUPATIONAL EXPOSURE; ENVIRONMENTAL LEAD; SHOTGUN PELLETS; HUMAN SKELETON; HUMAN TISSUES; LOS-ANGELES SO - Journal of Trauma-Injury Infection and Critical Care 2001 ;50(5):892-899 3628 UI - 12304 AU - Medina-Boudri A AU - Bueno-Baques D AU - Matutes-Aquino J AD - Ctr Invest Mat Avanzados, Chihuahua, MexicoUniv La Habana, Fac Fis IMRE, Lab Magnetismo, Havana 10400, CubaMedina-Boudri, A, Ctr Invest Mat Avanzados, Complejo Ind Chihuahua Miguel de Cervantes 120, Chihuahua, Mexico TI - Reversible-irreversible magnetization processes and remanence properties of coprecipitated cobalt ferrite AB - Cobalt ferrite was obtained by coprecipitation of iron (II) sulphate and cobalt (II) sulphate in acetone medium. Using the moving Preisach model, the reversible (M-rev) and irreversible (M-irr) components of the magnetization were separated. The parameter eta given by eta = (dM(rev) / dM(irr))(Hi) and the moving Preisach parameter k(m), were evaluated according to the relation eta = k(m)chi (rev) in order to investigate the behavior of M-rev. It was found that eta is not proportional to the reversible susceptibility, therefore k(m) is a function of the internal field. Isothermal remanent magnetization (IRM) and DC demagnetization (DCD) curves were measured. From these data the deltam curve and the Henkel plot were obtained showing that all the points remain under the Wohlfath line indicating that the local disorder dominates (demagnetizing-like effect) over the mean-field effect. The switching field distribution curves were obtained by differentiation of the IRM and DCD curves. The peak values of these switching field distributions differ by a factor of 2.7 MH - Cuba MH - Mexico|Chihuahua PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000172247900006 L2 - reversibility;remanence;cobalt ferrite;coprecipitation;SPINEL; MODEL SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2001 ;40(5):363-368 3629 UI - 11890 AU - Medina-Franco H AU - Listinsky C AU - Wilcox CM AU - Morgan D AU - Heslin MJ AD - Univ Alabama, Dept Surg, Sect Surg Oncol, Birmingham, AL 35294, USAUniv Alabama, Dept Pathol, Birmingham, AL 35294, USAUniv Alabama, Dept Gastroenterol, Birmingham, AL, USAUniv Alabama, Dept Radiol, Birmingham, AL, USAMedina-Franco, H, Inst Nacl Ciencias Med & Nutr, Dept Surg, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Concomitant sclerosing mesenteritis and bile duct fibrosis simulating Klatskin's tumor AB - Sclerosing mesenteritis is an uncommon benign condition that should be included in the differential diagnosis of abdominal masses. We present the first reported case of this condition in association with idiopathic bile duct fibrosis simulating Klatskin's tumor. A review of the literature regarding both clinical entities is presented MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Gastroenterology & Hepatology;Surgery U5 - J;Article AV - English IS - 1091-255X UR - ISI:000173549000015 L2 - sclerosing mesenteritis;bile duct fibrosis;cholangiocarcinoma;Klatskin's tumor;DIFFERENTIAL-DIAGNOSIS SO - Journal of Gastrointestinal Surgery 2001 ;5(6):658-660 3630 UI - 12844 AU - Medina-Gonzalez R AU - Proudlove G AU - Chumba-Segura L AU - Iliffe T AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Ecol, Merida 97100, Yucatan, MexicoUniv Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Zool, Merida 97100, Yucatan, MexicoManchester Museum, Dept Zool, Manchester M13 9PL, Lancs, EnglandTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USAMedina-Gonzalez, R, Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Ecol, Merida 97100, Yucatan, Mexico TI - Threatened fishes of the world: Ophisternon infernale (Hubbs, 1938) (Synbranchidae) MH - United Kingdom MH - Mexico|Yucatan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000170993700012 SO - Environmental Biology of Fishes 2001 ;62(1-3):170-170 3631 UI - 14434 AU - Medina L AU - Wykes C AD - UNAM, IIMAS, DISCA, Mexico City 1000, DF, MexicoUniv Nottingham, Sch Mech Mat Mfg Engn & Management, Nottingham NG7 2RD, EnglandMedina, L, UNAM, IIMAS, DISCA, Apdo Postal 20-276 Admon 20, Mexico City 1000, DF, Mexico TI - Multiple target 3D location airborne ultrasonic system AB - Beam-forming techniques are widely used to determine 2D and 3D position of targets. One of the main restrictions is the requirement for lambda /2 distance between element to avoid ambiguities due to sidelobes. This requirement can be eliminated when short pulses are used and the beam-forming process is applied to the envelope of the received signals only. In airborne ultrasound, the information available from the envelope received signals, is the time of flight. To calculate 3D position of targets, a non-linear equation system has to be solved. The solution to this system can be found by several numerical methods, mainly iterative processes. In this paper, a new 3D ultrasonic 3D target location system is presented which uses the Broyden method in conjunction with coarse beam forming. The operation of the system has been demonstrated using simulated data based on the characteristics of the 2D ultrasonic target location system developed at Nottingham University. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Acoustics;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0041-624X UR - ISI:000166515900005 L2 - airborne ultrasound;3D ranging systems;ARRAYS; NAVIGATION SO - Ultrasonics 2001 ;39(1):19-25 3632 UI - 14372 AU - Meersseman L AU - Verjovsky A AD - Univ Rennes 1, IRMAR, F-35042 Rennes, FranceUNAM, Inst Matemat, Unidad Cuernavaca, Cuernavaca, Morelos, MexicoMeersseman, L, Univ Rennes 1, IRMAR, Campus Beaulieu, F-35042 Rennes, France TI - Exotic algebraic structures of R-4 and Poincare conjectures AB - In this Note, we prove that the existence of a real algebraic affine structure on a fake R-4 would imply that either the classical Poincare conjecture in dimension 3 is false or else the differentiable Poincare conjecture in dimension 4 is false. (C) 2001 Academie des sciences/Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Morelos PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - French IS - 0764-4442 UR - ISI:000166751700012 L2 - TOPOLOGY SO - Comptes Rendus de l Academie des Sciences Serie I-Mathematique 2001 ;332(1):63-66 3633 UI - 12564 AU - Mejia-Barbosa Y AU - Malacara-Hernandez D AD - Ctr Invest Opt AC, Leon 37000, GTO, MexicoUniv Nacl Colombia, Dept Phys, Santa Fe De Bogota, ColombiaMejia-Barbosa, Y, Ctr Invest Opt AC, Apartado Postal 1-948, Leon 37000, GTO, Mexico TI - Object surface for applying a modified Hartmann test to measure corneal topography AB - A modified Hartmann test is proposed for measuring corneal topography. The plane screen with holes used in the typical Hartmann test is replaced with a curved object surface. This object surface yields a plane image for a spherical mirror surface. We show that the object surface is an oval of revolution that can be modeled by an ellipsoid. The plane image will be formed by a square array of circular spots, all with the same diameter. To obtain the square array in the image, we calculated the spatial distribution of the spots on the object surface. (C) 2001 Optical Society of America MH - Colombia MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000171853400028 SO - Applied Optics 2001 ;40(31):5778-5786 3634 UI - 13698 AU - Mejia-Barbosa Y AU - Malacara-Hernandez D AD - Ctr Invest Opt AC, Leon, Guanajuato, MexicoMejia-Barbosa, Y, Univ Nacl Cordoba, Dept Phys, Ciudad Univ, Santa Fe de Bogota, Colombia TI - A review of methods for measuring corneal topography AB - A review of some methods and their optical principles for measuring the corneal topography are presented in this paper. The concepts of principal curvatures and the ambiguity concerning the axial curvature of surfaces without symmetry of revolution are analyzed. These methods are divided into three groups according to the following optical principles: (1) specular reflection, which includes the Placido disk system, interferometry, and moire deflectometry; (2) diffuse reflection, which includes moire fringes, rasterstereography, and Fourier Transform Profilometry; and (3) scattered light, which includes the slitlamp system. We avoided describing the details of commercial instruments, only their working principles MH - Colombia MH - Mexico|Guanajuato PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Ophthalmology U5 - J;Review AV - English IS - 1040-5488 UR - ISI:000168611500018 L2 - corneal topography;principal curvatures;axial curvature;SKEW RAY ERROR; MOIRE DEFLECTOMETRY; RECONSTRUCTION; SURFACE; SYSTEM; POWER; ALGORITHM; CURVATURE; PATTERN; MAPS SO - Optometry and Vision Science 2001 ;78(4):240-253 3635 UI - 14576 AU - Mejia-Barbosa Y AD - Univ Nacl Colombia, Dept Phys, Santa Fe De Bogota, DC, ColombiaMejia-Barbosa, Y, Ctr Invest Opt, Apartado Postal 1-948, Leon 37000, GTO, Mexico TI - Correlation-based method for comparing and reconstructing nearly identical two-dimensional structures AB - A method for comparing and reconstructing two nearly identical planar objects that are composed of the same number of identical apertures is presented. These structures differ only in the location of one of the apertures. The method is based on a subtraction algorithm, which involves the cross-correlation and autocorrelation functions of the compared structures. Simulated results illustrate the feasibility of the method. (C) 2001 Optical Society of America OCIS codes: 070.2580, 070.5010, 070.6020 MH - Colombia MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000166260300005 SO - Applied Optics 2001 ;40(2):235-239 3636 UI - 13874 AU - Mel'nikov IV AU - Mihalache D AU - Panoiu NC AU - Ginovart F AU - Lara AZ AD - Univ Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoENSSAT, CNRS, UPRESA 6082, Lab Optron, F-22305 Lannion, FranceInst Atom Phys, Dept Theoret Phys, R-76900 Bucharest, RomaniaNYU, Dept Phys, New York, NY 10003, USAMihalache, D, Univ Politecn Catalunya, Dept Signal Theory & Commun, Lab Photon, ES-08034 Barcelona, Spain TI - Coherent amplification of dual-frequency optical solitons in a doped fiber AB - It is found that the temporal behavior of sub-picosecond optical soliton-like pulses propagating through a fiber amplifier exhibits large deviations from the predictions based on standard soliton interaction theories. Both cases of adiabatic and pure coherent amplification of these dual-frequency solitons are studied. We show that it is possible to generate either a dual-frequency bound soliton state or a soliton train, The structure of the emerging optical state depends on the balance between the retarded coherent response introduced by an inverted two-level medium, nonresonant cubic nonlinearity, group-velocity dispersion, and Raman self-scattering. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos MH - Romania MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000168222800015 L2 - solid-state lasers;coherent effects;ultrafast optics;optical solitons;TI-SAPPHIRE LASER; SELF-INDUCED-TRANSPARENCY; FEMTOSECOND PULSES; AMPLIFIER; PROPAGATION; GENERATION; DYNAMICS SO - Optics Communications 2001 ;191(1-2):133-140 3637 UI - 13010 AU - Melendez-Lira M AU - Santana-Aranda MA AU - Lopez-Lopez M AU - Tamura M AU - Yodo T AU - Vidal MA AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoOsaka Inst Technol, Asahi Ku, Osaka 5358585, JapanUniv Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoSantana-Aranda, MA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Effects of the substrate tilting angle on the molecular beam epitaxial growth of GaAs on Si(110) AB - We have grown GaAs layers by molecular beam epitaxy on Si(1 1 0) substrates with different tilted angles towards the [001] direction. The samples where characterized by atomic force microscopy (AFM), high resolution x-ray diffraction (HRXRD), transmission electron microscopy (TEM), and photoreflectance spectroscopy (PR). The full width at half maximum of the HRXRD reflection peaks and the surface roughness determined by AFM decreased as the off angle increased up to 6 degrees. ne increase in the crystal quality of the films was confirmed by the TEM measurements. The PR spectra showed the presence of oscillations above the GaAs band-gap signal associated to built-in internal electric fields. The built-in electric field strength and the GaAs band-gap energy values were obtained by employing the Franz-Keldysh model. We obtained band-gap energy values that suggest the presence of residual strains in the films. (C) 2001 American Vacuum Society MH - Japan MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000170598400082 L2 - THREADING DISLOCATIONS; SI; LAYERS; SEMICONDUCTORS; MECHANISM; SILICON; STRAIN SO - Journal of Vacuum Science & Technology B-An International Journal Devoted to Microelectronics and Nanometer Structures-Processing Measurement and Phenomena 2001 ;19(4):1567-1571 3638 UI - 14104 AU - Melgoza JJR AU - Heydt GT AU - Keyhani A AU - Agrawal BL AU - Selin D AD - Univ Michoacana, Morelia 58240, Michoacan, MexicoArizona State Univ, Tempe, AZ 85287, USAOhio State Univ, Columbus, OH 43210, USAArizona Publ Serv, Phoenix, AZ, USAMelgoza, JJR, Univ Michoacana, Morelia 58240, Michoacan, Mexico TI - Synchronous machine parameter estimation using the Hartley series AB - This paper presents a navel alternative to estimate armature circuit parameters of large utility generators using real time operating data. The proposed approach uses the Hartley series for fitting operating data (voltage and currents measurements). The essence of the method is the use of linear state estimation to identify the coefficients of the Hartley series. The approach is tested for noise corruption likely to be found in measurements. The method is found to be suitable for the processing of digital fault recorder data to identify synchronous machine parameters MH - Mexico|Michoacan MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Energy & Fuels;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8969 UR - ISI:000167587500009 L2 - fault detection in field windings;Hartley series;on-line tracking;operational matrices;orthogonal series expansion;parameter estimation;TIME-VARYING SYSTEMS; SHIFTED LEGENDRE POLYNOMIALS; LAGUERRE-POLYNOMIALS; BILINEAR-SYSTEMS; IDENTIFICATION SO - Ieee Transactions on Energy Conversion 2001 ;16(1):49-54 3639 UI - 14105 AU - Melgoza JJR AU - Heydt GT AU - Keyhani A AU - Agrawal BL AU - Selin D AD - Univ Michoacana, Morelia 58240, Michoacan, MexicoArizona State Univ, Tempe, AZ 85287, USAOhio State Univ, Columbus, OH 43210, USAArizona Publ Serv, Phoenix, AZ, USAMelgoza, JJR, Univ Michoacana, Morelia 58240, Michoacan, Mexico TI - An algebraic approach for identifying operating point dependent parameters of synchronous machines using orthogonal series expansions AB - This paper presents a method for identifying armature and field parameters of synchronous machines from Digital Fault Recorder (DFR) data. The method uses operational properties of orthogonal series expansions such as the Hartley, Walsh and Fourier series to transform a set of differential equations into linear algebraic equations. The algebraic formulation and use of operational calculus reduce the problem of identifying parameters to the manipulation of matrices that may be easily performed in such computational packages as Matlab, The variation of machine parameters with operating point is considered MH - Mexico|Michoacan MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Energy & Fuels;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8969 UR - ISI:000167587500016 L2 - Hartley series;least squares;maximum likelihood;operational matrices;parameter estimation;synchronous machines;MAXIMUM-LIKELIHOOD-ESTIMATION; SSFR TEST DATA SO - Ieee Transactions on Energy Conversion 2001 ;16(1):92-98 3640 UI - 14123 AU - Melgoza LM AU - Rabasco AM AU - Sandoval H AU - Caraballo I AD - Univ Seville, Dept Farm & Tecnol Farmaceut, E-41012 Seville, SpainUniv Autonoma Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoCaraballo, I, Univ Seville, Dept Farm & Tecnol Farmaceut, C Prof Garcia Gonzalez S-N, E-41012 Seville, Spain TI - Estimation of the percolation thresholds in dextromethorphan hydrobromide matrices AB - Percolation theory is a multidisciplinary theory that studies chaotic systems. It has been applied in the pharmaceutical field since 1987. Knowledge of the percolation threshold - one of the most important concepts in percolation theory - results in a clear improvement of the solid dosage form design. The percolation threshold is the concentration showing the maximum probability to obtain, for the first time, a percolating cluster of a substance. In this work, the percolation thresholds of dextromethorphan . HBr/Eudragit(R) RS-PM inert matrices were estimated. The drug percolation threshold was estimated as 0.3691+/-0.0541 (P = 0.05) of the total porosity (ranging between 23 and 36% w/w of drug). The SEM micrographs of the matrices are consistent with the estimated percolation range. In agreement with previous reports, different percolation thresholds were found for the matrix forming excipient Eudragit(R) RS-PM. The site percolation threshold (based on the release properties) ranged between 10 and 20% v/v of the excipient, the site-bond percolation threshold (estimated from the mechanical properties) between 29.5 and 34% v/v of the excipient and the swelling percolation threshold between 34.3 and 46.9% v/v of the excipient. These percolation ranges are in agreement with those found previously for Eudragit(R) RS-PM matrices containing naltrexone . HCl and morphine . HCl. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0928-0987 UR - ISI:000167531700013 L2 - dextromethorphan hydrobromide;Eudragit (R) RS-PM;percolation theory;percolation threshold;inert matrix;controlled release;solid dosage forms;RELEASE; SYSTEMS; DESIGN; MODEL SO - European Journal of Pharmaceutical Sciences 2001 ;12(4):453-459 3641 UI - 14640 AU - Mellies JL AU - Navarro-Garcia F AU - Okeke I AU - Frederickson J AU - Nataro JP AU - Kaper JB AD - Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAReed Coll, Dept Biol, Portland, OR 97202, USAUniv Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Med, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Pediat, Baltimore, MD 21201, USAInst Politecn Nacl, CINVESTAV, Dept Cell Biol, Dept Publ Hlth, Mexico City 07000, DF, MexicoKaper, JB, Univ Maryland, Sch Med, Ctr Vaccine Dev, 685 W Baltimore St, Baltimore, MD 21201 USA TI - espC pathogenicity island of enteropathogenic Escherichia coli encodes an enterotoxin AB - At least five proteins are secreted extracellularly by enteropathogenic Escherichia coli (EPEC), a leading cause of infant diarrhea in developing countries. However only one, EspC, is known to be secreted independently of the type III secretion apparatus encoded by genes located within the 35.6-kb locus of enterocyte effacement pathogenicity island. EspC is a member of the autotransporter family of proteins, and the secreted portion of the molecule is 110 kDa. Here we determine that the espC gene is located within a second EPEC pathogenicity island at 60 min on the chromosome of E. coli. We also show that EspC is an enterotoxin, indicated by rises in short-circuit current and potential difference in rat jejunal tissue mounted in Ussing chambers. In addition, preincubation with antiserum against the homologous Pet enterotoxin of enteroaggregative E. coli eliminated EspC enterotoxin activity. Like the EAF plasmid, the espC pathogenicity island was found only in a subset of EPEC, suggesting that EspC may play a role as an accessory virulence factor in some but not all EPEC strains MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 51 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000165943500039 L2 - ENTEROCYTE EFFACEMENT LEE; PROTEASE-LIKE FAMILY; EPITHELIAL-CELLS; SHIGELLA-FLEXNERI; YERSINIA-PESTIS; IGA PROTEASE; HEAT-LABILE; SECRETION; GENE; SEQUENCE SO - Infection and Immunity 2001 ;69(1):315-324 3642 UI - 11950 AU - Mellink E AU - Martin PS AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Arizona, Dept Geosci, Desert Lab, Tucson, AZ 85721, USAMellink, E, CICESE, POB 434844, San Diego, CA 92143, USA TI - Mortality of cattle on a desert range: paleobiological implications AB - Mortality of domestic livestock can reveal circumstances of death of interest to the taphonomist and palcobiologist. We present a case that involves a dieoff and incipient burial of cattle at the end of a severe drought in a ranch in north-western Sonora (Mexico). Regional environmental crisis, such as drought, have been suggested to explain massive death, but we contend that droughts suddenly broken by a severe storm or storms and steady rains would be more stressful. As a result, in and lands mammals could have accumulated in fossil deposits in short bursts through time. (C) 2001 Academic Press MH - Mexico|Baja California MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000173469500002 L2 - drought;taphonomy;paleobiology;mortality;megaherbivores;TAPHONOMY SO - Journal of Arid Environments 2001 ;49(4):671-675 3643 UI - 13828 AU - Melliti K AU - Meza U AU - Adams BA AD - Utah State Univ, Dept Biol, Logan, UT 84322, USAUniv Autonoma San Luis Potosi, Fac Med, Dept Fisiol & Farmacol, San Luis Potosi 78210, MexicoAdams, BA, Utah State Univ, Dept Biol, 5303 Old Main Hill, Logan, UT 84322 USA TI - RG82 blocks slow muscarinic inhibition of N-type Ca2+ channels reconstituted in a human cell line AB - 1. Native N-type Ca2+ channels undergo sustained inhibition through a slowly activating pathway linked to M1 muscarinic acetylcholine receptors and G alphaq/11 proteins. Little is known concerning the regulation of this slow inhibitory pathway. We have reconstituted slow muscarinic inhibition of N-type channels in HEK293 cells (a human embryonic kidney cell line) by coexpressing cloned alpha 1B (Ca(v)2.2) Ca2+ channel subunits and M1, receptors. Expressed Ca2+ currents were recorded using standard whole-cell, ruptured-patch techniques. 2. Rapid application of carbachol produced two kinetically distinct components of Ca2+ channel inhibition. The fast component of inhibition had a time constant of <1 s, whereas the slow component had a time constant of 5-40 s. Neither component of inhibition was reduced by pertussis toxin (PTX) or staurosporine. 3. The fast component of inhibition was selectively blocked by the G beta gamma -binding region of beta -adrenergic receptor kinase 1, suggesting that fast inhibition is mediated by G beta gamma released from G alphaq/11. 4. The slow component of inhibition was selectively blocked by regulator of G protein signalling 2 (RGS2), which preferentially interacts with G alphaq/11 proteins. RGS2 also attenuated channel inhibition produced by intracellular dialysis with non-hydrolysable GTP gammaX. Together these results suggest that RGS2 selectively blocked slow inhibition by functioning as an effector antagonist, rather than as a GTPase-accelerating protein (GAP). 5. These experiments demonstrate that slow muscarinic inhibition of N-type Ca2+ channels can be reconstituted in non-neuronal cells, and that RGS2 can selectively block slow muscarinic inhibition while leaving fast muscarinic inhibition intact. These results identify RGS2 as a potential physiological regulator of the slow muscarinic pathway MH - USA MH - Mexico|San Luis Potosi PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 14 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000168309900008 L2 - RAT SYMPATHETIC NEURONS; PROTEIN SIGNALING PROTEINS; BETA-GAMMA-SUBUNITS; VOLTAGE-DEPENDENT MODULATION; CALCIUM CHANNELS; ACETYLCHOLINE-RECEPTORS; ALPHA-SUBUNIT; RGS PROTEINS; K+ CHANNELS; REGULATORS SO - Journal of Physiology-London 2001 ;532(2):337-347 3644 UI - 13869 AU - Menchaca-Rocha A AU - Martinez-Davalos A AU - Nunez R AU - Popinet S AU - Zaleski S AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Paris 06, CNRS, UMR 7607, F-75015 Paris, FranceMenchaca-Rocha, A, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Coalescence of liquid drops by surface tension AB - The merging of two mercury drops at very low kinetic energy is observed using fast, digital, and analog imaging techniques. Sequences showing the time evolution of the overall-surface shape as well as an amplified view of the contact region are shown. Qualitative and quantitative comparisons with computations of the Navier-Stokes equation with a free surface are made. In the model, the surface is tracked by a marker-chain method MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000168215100054 L2 - DYNAMICS; FUSION SO - Physical Review e 2001 ;63(4):art-046309 3645 UI - 13363 AU - Mendez-Garcia VH AU - Lopez-Lopez M AU - Lastras-Martinez A AU - Vidal MA AU - Luyo-Alvarado J AU - Melendez-Lira M AU - Momose K AU - Yonezu H AD - Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoToyohashi Univ Technol, Dept Elect & Elect Engn, Toyohashi, Aichi 441, JapanMendez-Garcia, VH, Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, Alvaro Obregon 64, San Luis Potosi 78000, Mexico TI - Study of the crystal quality and Ga-segregation in ZnSe films grown by molecular beam epitaxy on AlxGa1-xAs and InxGa1-xAs buffer layers on GaAs substrates AB - In the present work, we report a study of the molecular beam epitaxial growth of ZnSe on GaAs substrates using AlxGa1-xAs and InxGa1-xAs ternary alloys as buffer layers, When growing ZnSe directly on a thermally desorbed GaAs substrate, surface segregation of Ga across the film towards the ZnSe surface was observed by secondary ion mass spectroscopy. We demonstrate that the use of AlGaAs buffer layers is very effective to suppress the Ga surface segregation. The characterization of the films by reflection high-energy electron diffraction, atomic force microscopy. transmission electron microscopy, photoluminescence and photoreflectance spectroscopy revealed that the best crystal quality ZnSe films were obtained for buffer layers with In or Al concentrations of 1%. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000169557600125 L2 - atomic force microscopy;reflection high energy electron diffraction;segregation;semiconducting II-VI compound;semiconducting ternary compounds;LASER-DIODES SO - Journal of Crystal Growth 2001 ;227():639-644 3646 UI - 14250 AU - Mendez ER AU - Garcia-Guerrero EE AU - Escamilla HM AU - Maradudin AA AU - Leskova TA AU - Shchegrov AV AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USARussian Acad Sci, Inst Spect, Troitsk 142092, Moscow Region, RussiaUniv Rochester, Rochester Theory Ctr Opt Sci & Engn, Rochester, NY 14627, USAUniv Rochester, Dept Phys & Astron, Rochester, NY 14627, USA TI - Photofabrication of random achromatic optical diffusers for uniform illumination AB - We propose a method of designing two-dimensional random surfaces that scatter light uniformly within a specified range of angles and produce no scattering outside that range. The method is first tested by means of computer simulations. Then a procedure for fabricating such structures on photoresist is described, and light-scattering measurements with the fabricated samples are presented. The results validate the design procedure and show that the fabrication method is feasible. (C) 2001 Optical Society of America MH - Mexico|Baja California MH - Russia MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000167112900011 L2 - SCATTERING; SURFACE; DESIGN; LIGHT SO - Applied Optics 2001 ;40(7):1098-1108 3647 UI - 14223 AU - Mendez N AU - Linke-Gamenick I AU - Forbes VE AU - Baird DJ AD - UNAM, Inst Ciencias Mar & Limnol, Estac Mazatlan, Lab Invertebrados Bentonicos, Mazatlan 82000, Sinaloa, MexicoRoskilde Univ, Dept Life Sci & Chem, DK-4000 Roskilde, DenmarkUniv Stirling, Inst Aquaculture, Environm Grp, Stirling FK9 4LA, ScotlandMendez, N, Univ Stirling, Inst Aquaculture, Environm Grp, Stirling FK9 4LA, Scotland TI - Sediment processing in Capitella spp. (Polychaeta : Capitellidae): strain-specific differences and effects of the organic toxicant fluoranthene AB - The effects of the widespread polycyclic aromatic hydrocarbon (PAH) fluoranthene on sediment-processing rates in the infaunal polychaete Capitella spp. were investigated by comparing five populations of this deposit-feeding species complex: Capitella sp. I from New York, USA; Capitella sp. M from Miles, Greece; Capitella sp. S from Sylt, Germany; and two unidentified Capitella populations from salmon farm sediments - Capitella population K from Kilmelford, Scotland and Capitella population C from Cranford, Ireland. Replicate worms from each strain were exposed to 0, 10, and 95 mug (g dry wt sediment)(-1) fluoranthene (= mug/g fluoranthene) for a period of 16 days. Initial and final wet and dry weights (mg) of worms and worm-specific growth rates (WSGRs) were calculated. Sediment processing was measured as the sum of the total dry weight of pellets produced during the experiment, and we estimated size-specific processing rates (SSPRs) as a measure of sediment processed per mg worm dry weight per day. The five populations of Capitella spp. differed significantly in body size, WSGR, and sediment-processing rates. Capitella sp. I grew faster than all of the other populations. Capitella population C and Capitella population K from fish farm sediments, with the largest body lengths (up to 52.0 +/- 27.2 mm), had the highest processing rates, whereas the small Capitella sp. S (up to 17.1 +/- 5.6 mm) had the lowest. There were also significant differences in SSPR among populations with Capitella sp. I having a higher SSPR (about 12 x body wt/day) than Capitella population C (about 5 x body wt/day) and Capitella population K (3 x body wt/day). The fluoranthene concentrations used in the present study, while representing moderately to highly contaminated conditions, had only marginal effects on sediment-processing and growth rates of all of the Capitella populations examined. Processing of contaminated sediment by Capitella spp. may be important in the remediation of PAH-contaminated sediment MH - Denmark MH - Mexico|Sinaloa MH - United Kingdom PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000167194100008 L2 - POLYCYCLIC AROMATIC-HYDROCARBONS; SP-I; CAPITATA POLYCHAETA; POPULATION-DYNAMICS; DEGRADATION; GROWTH; SEA; MASSACHUSETTS; ENRICHMENT; METABOLISM SO - Marine Biology 2001 ;138(2):311-319 3648 UI - 12377 AU - Mendoza-Dominguez A AU - Russell AG AD - ITESM, Dept Chem Engn, Monterrey 64849, NL, MexicoGeorgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332, USAMendoza-Dominguez, A, ITESM, Dept Chem Engn, Monterrey Campus,Ave Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - Emission strength validation using four-dimensional data assimilation: Application to primary aerosol and precursors to ozone and secondary aerosol AB - Three-dimensional air quality models (AQMs) represent the most powerful tool to follow the dynamics of air pollutants at urban and regional scales. Current AQMs can account for the complex interactions between gasphase chemistry, aerosol growth, cloud and scavenging processes, and transport. However, errors in model applications still exist due in part to limitations in the models themselves and in part to uncertainties in model inputs. Four-dimensional data assimilation (FDDA) can be used as a top-down tool to validate several of the model inputs, including emissions inventories, based on ambient measurements. Previously, this FDDA technique was used to estimate adjustments in the strength and composition of emissions of gas-phase primary species and O-3 precursors. In this paper, we present an extension to the FDDA technique to incorporate the analysis of particulate matter (PM) and its precursors. The FDDA approach consists of an iterative optimization procedure in which an AQM is coupled to an inverse model, and adjusting the emissions minimizes the difference between ambient measurements and model-derived concentrations. Here, the FDDA technique was applied to two episodes, with the modeling domain covering the eastern United States, to derive emission adjustments of domainwide sources of NOx, volatile organic compounds (VOCs), CO, SO2, NH3, and fine organic aerosol emissions. Ambient measurements used include gas-phase inorganic and organic species and speciated fine PM. Results for the base-case inventories used here indicate that emissions of SO2 and CO appear to be estimated reasonably well (requiring minor revisions), while emissions of NOx, VOC, NH3, and organic PM with aerodynamic diameter less than 2.5 mum (PM2.5) require more significant revision MH - Mexico|Nuevo Leon MH - USA PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000172140400005 L2 - DIRECT SENSITIVITY ANALYSIS; PARTICULATE MATTER; AIR-QUALITY; PHOTOCHEMICAL MODELS; POLLUTANT TRANSPORT; MECHANISMS; ISOPRENE; URBAN SO - Journal of the Air & Waste Management Association 2001 ;51(11):1538-1550 3649 UI - 13586 AU - Mendoza BS AU - Palummo M AU - Onida G AU - Del Sole R AD - Univ Roma Tor Vergata 2, Dipartimento Fis, Ist Nazl Fis Mat, Rome, ItalyMendoza, BS, AC, Ctr Invest Opt, Leon, Guanajuato, Mexico TI - Ab initio calculation of second-harmonic-generation at the Si(100) surface AB - We present a microscopic, first-principles calculation of the second-harmonic spectra of clean and Hydrogenated Si(100) surfaces. The differences between theoretical spectra obtained for different reconstructions, namely the 2 X 1 and the c(4 X 2) ones, are dramatically enhanced with respect to those obtained in linear optical response. The calculated spectral features are analyzed in detail, studying their relations with those of bulk and surface linear optical spectra. The inclusion of quasiparticle effects within the scissors operator approximation yields theoretical spectra in good agreement with the experiments MH - Italy MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000168937200080 L2 - 2ND-HARMONIC GENERATION; OPTICAL-PROPERTIES; QUASI-PARTICLE; MICROSCOPIC CALCULATION; SI SURFACES; SPECTROSCOPY; HYDROGEN; SI(001); SILICON; SEMICONDUCTORS SO - Physical Review B 2001 ;6320(20): 3650 UI - 13740 AU - Mendoza PJ AU - Mandelis A AU - Nicolaides L AU - Huerta J AU - Rodriguez E AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro, Qro, MexicoUniv Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON, CanadaMendoza, PJ, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Jose Sturob 10,Col Alamedas, Queretaro, Qro, Mexico TI - Combined photothermal and photoacoustic characterization of silicon-epoxy, and the existence of a particle percolation threshold AB - Photoacoustic and Photothermal Radiometric detection were used to determine the thermal properties of silicon-epoxy composite materials in the volume range of 0 < x < 32 vol. % (50 mum). Photoacoustic detection was used to study the evolution of the thermal diffusivity as a function of the Si volume fraction, and PTR was used to determine the role of the electronic carriers in thermal transport by taking the optical properties into consideration. The combined PA and PTR measurements show that there exists no linear relation between thermal diffusivity and silicon volume fraction. The thermal diffusivity and optical absorption coefficient measurements can be obtained by means of combined photoacoustic and photothermal radiometric probes. Both parameters exhibit anomalous behavior in the 16 % Si volume fraction range, corroborating the existence of an electrical particle percolation threshold for the three dimensional random close-packed solids MH - Canada MH - Mexico|Queretaro PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200078 L2 - THERMAL-CONDUCTIVITY; COMPOSITES SO - Analytical Sciences 2001 ;17():S269-S272 3651 UI - 12199 AU - Mendoza R AU - Sandoval I AU - Mendez J AU - Reyes JL AU - Campillo B AU - Juarez JA AU - Kestner DW AD - Ispat Mexicana SA CV, Cardenas, Michoacan, MexicoUNAM, Fac Quim, Mexico City, DF, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoUNAM, Inst Invest Mat, Mexico City 14510, DF, MexicoKvaerner Met, Pittsburgh, PA 15222, USA TI - Development of a high reducibility acid pellet at Imexsa AB - Imexa is an integrated steel slab producer located on the west coast of Mexico, in the town of Lazaro Cardenas, Michoacan. Because of increasing slab production, demand for pellets to use in the direct reduction plants prompted Imexsa to reactivate its partially completed pelletizing plant project in 1994. Pilot tests were carried out in 1995, at Pena Colorada, Colima, one of the four then-existing Mexican pelletizing plants. Various hematite minerals from Brazil were used as feed. These were mixed with limestone, dolomite, coke, and pellet fines in order to obtain fluxed pellets which would be used to feed two direct reduction processes. At the end of 1996, Imexsa's pelletizing plant began to operate with the aim of producing 3.5 million metric tons of pellets per year. The percentage of metallization (PM) reached on reducing these oxide pellets during initial use in direct reduced iron (DRI) production was 84.9%, a low value. Further research with several mineral mixtures resulted in a binary basicity (B-2) of similar to0.35 and PM of similar to 94.0% MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Morelos MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1042-6914 UR - ISI:000172665100006 L2 - agglomeration process;binary basicity;coke;direct reduction process;dolomite;electric arc furnace;grinding;iron minerals;pellet;percent of metallization;raw materials;slab;sponge iron;steel;steel making SO - Materials and Manufacturing Processes 2001 ;16(4):519-529 3652 UI - 14375 AU - Meneses-Acosta A AU - Mendonca RZ AU - Merchant H AU - Covarrubias L AU - Ramirez OT AD - UNAM, Dept Bioingn, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUNAM, Dept Genet & Fisiol Celular, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUNAM, Dept Biol Celular, Inst Invest Biomed, Cuernavaca 62250, Morelos, MexicoInst Butantan, Lab Inmunol Viral, Sao Paulo, BrazilRamirez, OT, UNAM, Dept Bioingn, Inst Biotecnol, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Comparative characterization of cell death between Sf9 insect cells and hybridoma cultures AB - Physiological cell death (PCD) in Sf9 insect cell batch cultures was comprehensively characterized using simultaneous determinations of qualitative and quantitative assays, including agarose gel electrophoresis, confocal, epifluorescence, and transmission electron microscopy, and DNA content by flow cytometry. Results were compared to hybridoma cultures where abundant information of apoptosis exists. Both cultures shared some typical apoptosis features, including cell shrinkage, loss of sphericity, swollen endoplasmic reticulum and Golgi apparatus, chromatin condensation, and specific DNA degradation. However, distinctive morphological and kinetic differences between both cultures revealed that Sf9 cells died by an atypical PCD process characterized by absence of nuclear fragmentation, scarce association of condensed chromatin to the nuclear envelope, swollen mitochondria, and high nonspecific DNA degradation. These features, distinctive of necrosis, were not observed in the normal apoptotic process of hybridomas. Glucose depletion marked the appearance of apoptotic Sf9 cells, which there up on increased gradually, whereas apoptotic hybridomas rapidly increased upon glutamine depletion. Furthermore, active phagocytosis was found in Sf9 viable cells, a characteristic phenomenon during in vivo apoptosis but uncommon for in vitro cultures. Sf9 cells contained unusually high numbers of phagosomes, particularly after glucose depletion. Additionally, few apoptotic bodies accumulated in culture, suggesting their elimination by phagocytosis. Other distinctive characteristics of Sf9 cells were the presence of a polynucleated hypertrophic population fraction, polyploidy, cell cycle arrest in G2/M phase, and more necrosis compared to hybridomas. Such phenomena prevented a reliable quantification of apoptosis from determination of the sub-G1 peak. Nonetheless, emergence of a bimodal Sf9 cell size distribution coincided with the increase in the sub-G1 population and onset of death. The fraction of particles in the smaller peak (6-11 mum diameter) closely correlated with the fractions of apoptotic bodies, late apoptotic, and secondary necrotic cells. Accordingly, Sf9 cell size was shown to be an effective, rapid, and simple parameter for quantifying death. Altogether, the results of this study provide new insights into PCD and other phenomena in insect cell culture important for biotechnological applications of Sf9 cells. (C) 2001 John Wiley & Sons, Inc MH - Brazil MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 10 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000166774900007 L2 - apoptosis;Sf9 insect cells;hybridomas;agarose gel electrophoresis;electron, confocal, and epifluorescence microscopy;flow cytometry;cell size;HAMSTER OVARY CELLS; ANTIBODY PRODUCTIVITY; DEPRIVED CULTURES; MAMMALIAN-CELLS; BATCH CULTURES; APOPTOSIS; DNA; CYCLE; VIRUS; DEPRIVATION SO - Biotechnology and Bioengineering 2001 ;72(4):441-457 3653 UI - 13208 AU - Meneses-Nava MA AU - Barbosa-Garcia O AU - az-Torres LA AU - Chavez-Cerda S AU - Torres-Cisneros M AU - King TA AD - Ctr Invest Opt AC, Guanajuato, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Guanajuato, FIMEE, Guanajuato, MexicoUniv Manchester, Schuster Lab, Dept Phys, Manchester M13 9PL, Lancs, EnglandMeneses-Nava, MA, Ctr Invest Opt AC, Apdo Postal 1-948,3700 Leon, Guanajuato, Mexico TI - Effect of PMMA impregnation on the fluorescence quantum yield of sol-gel glasses doped with quinine sulfate AB - The fluorescence quantum yield of quinine sulfate: in sol-gel and PMMA impregnated glasses is measured. The observed quantum yield improvement in the sol-gel matrix, compared to ethanol, is interpreted as a reduction of nonradiative relaxation channels by isolation of the molecules by the cage of the glass. PMMA impregnated sol-gel glasses show an extra improvement of the fluorescence yield, which is interpreted as a reduction of the free space and the rigid fixation of the molecules to the matrix. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000169997400007 L2 - fluorescence;sol-gel;organic molecules;quantum yield;SPECTROSCOPIC BEHAVIOR; DYES SO - Optical Materials 2001 ;17(3):415-418 3654 UI - 14478 AU - Mennickent RE AU - Greiner J AU - Tovmassian G AD - Concepcion Univ, Fac Ciencias Fis & Matemat, Dept Fis, Concepcion, ChileAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUNAM, Observ Astron Nacl, Inst Astron, Ensenada 22860, Baja California, MexicoMennickent, RE, Concepcion Univ, Fac Ciencias Fis & Matemat, Dept Fis, Casilla 160-C, Concepcion, Chile TI - On the nature of V 589 Sagittarii AB - We present optical and near infrared spectroscopy of the symbiotic star candidate V589 Sgr. The presence of TiO and VO absorption bands, along with strong H I and He I emissions, confirm the symbiotic star classification, although the primary is clearly rather cooler than is common in symbiotics. Following standard spectroscopic methods, a spectral type of M4 III is derived for the cool component, along with a distance of 8 kpc MH - Chile MH - Germany MH - Mexico|Baja California PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000166541100009 L2 - stars : binaries : general;stars : binaries : symbiotic;stars : evolution;stars : fundamental parameters;stars : V 589 Sgr;SOUTHERN SPECTROPHOTOMETRIC STANDARDS; COOL COMPONENTS; SYMBIOTIC STARS; CLASSIFICATION SO - Astronomy and Astrophysics 2001 ;365(2):115-117 3655 UI - 13346 AU - Mercado A AU - de los Heros P AU - Vazquez N AU - Meade P AU - Mount DB AU - Gamba G AD - Univ Nacl Autonoma Mexico, Mol Physiol Unit, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 14000, DF, MexicoVanderbilt Univ, Med Ctr, Dept Med, Div Nephrol & Hypertens, Nashville, TN 37232, USAGamba, G, Univ Nacl Autonoma Mexico, Mol Physiol Unit, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Functional and molecular characterization of the K-Cl cotransporter of Xenopus laevis oocytes AB - The K-Cl cotransporters (KCCs) have a broad range of physiological roles, in a number of cells and species. We report here that Xenopus laevis oocytes express a K-Cl cotransporter with significant functional and molecular similarity to mammalian KCCs. Under isotonic conditions, defolliculated oocytes exhibit a Cl--dependent Rb-86(+) uptake mechanism after activation by the cysteine-reactive compounds N-ethylmaleimide (NEM) and mercuric chloride (HgCl2). The activation of this K-Cl cotransporter by cell swelling is prevented by inhibition of protein phosphatase-1 with calyculin A; NEM activation of the transporter was not blocked by phosphatase inhibition. Kinetic characterization reveals apparent values for the Michaelis-Menten constant of 27.7 +/- 3.0 and 15.4 +/- 4.7 mM for Rb+ and Cl-, respectively, with an anion selectivity for K+ transport of Cl- = PO43- = Br- > I- > SCN- > gluconate. The oocyte K-Cl cotransporter was sensitive to several inhibitors, including loop diuretics, with apparent half-maximal inhibition values of 200 and 500 muM for furosemide and bumetanide, respectively. A partial cDNA encoding the Xenopus K-Cl cotransporter was cloned from oocyte RNA; the corresponding transcript is widely expressed in Xenopus tissues. The predicted COOH-terminal protein fragment exhibited particular homology to the KCC1/KCC3 subgroup of the mammalian KCCs, and the functional characteristics are the most similar to those of KCC1 (Mercado A, Song L, Vazquez N, Mount DB, and Gamba G. J Biol Chem 275: 30326-30334, 2000) MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Cell Biology;Physiology U5 - J;Article AV - English IS - 0363-6143 UR - ISI:000169712000031 L2 - potassium-chloride cotransport;cell volume;cell swelling;RED-BLOOD-CELLS; CHLORIDE COTRANSPORTER; OKADAIC ACID; PROTEIN PHOSPHATASES; MALPIGHIAN TUBULES; KCL COTRANSPORT; TRANSPORT; ACTIVATION; VOLUME; RABBIT SO - American Journal of Physiology-Cell Physiology 2001 ;281(2):C670-C680 3656 UI - 14113 AU - Mercado A AU - de los Heros P AU - Vazquez N AU - Meade P AU - Mount DB AU - Gamba G AD - Natl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoVanderbilt Univ, Nashville, TN, USA TI - Characterization of the K-Cl cotransporter of Xenopus laevis oocytes MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438102524 SO - Faseb Journal 2001 ;15(4):A442-A442 3657 UI - 14137 AU - Mercado U AD - Univ Nacl Autonoma Baja California, Hosp Gen Mexicali, Mexicali, Baja California, MexicoMercado, U, Univ Nacl Autonoma Baja California, Hosp Gen Mexicali, MSC 20765,337 1st St, Calexico, CA 92231 USA TI - Peptic ulcer, or should it be called Marshall's disease? MH - USA MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Letter AV - English IS - 0002-9270 UR - ISI:000167596300069 L2 - MOYNIHANS-DISEASE SO - American Journal of Gastroenterology 2001 ;96(3):930-930 3658 UI - 14218 AU - Mereghetti S AU - Mignani RP AU - Covino S AU - Chaty S AU - Israel GL AU - Neuhauser R AU - Plana H AU - Stella L AD - CNR, Ist Fis Cosm, I-20133 Milan, ItalyESO, D-85748 Garching, GermanyOsservatorio Astron Merate, I-22055 Merate, LC, ItalyOpen Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, EnglandOsservatorio Astron Roma, I-00040 Rome, ItalyMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyObserv Astron Nacl, Ensenada, Baja California, MexicoMereghetti, S, CNR, Ist Fis Cosm, Via Bassini 15, I-20133 Milan, Italy TI - A search for the optical/infrared counterpart of the anomalous X-ray pulsar 1E 1841-045 AB - We have carried out a search for the optical and infrared counterpart of the anomalous X-ray pulsar 1E 1841-045, which is located at the centre of the supernova remnant Kes 73. We present the first deep optical and infrared images of the field of 1E 1841-045, as well as optical spectroscopy results that exclude the brightest objects in the error circle as possible counterparts. A few of the more reddened objects in this region can be considered as particularly interesting candidates, in consideration of the distance and absorption expected from the association with Kes 73. The strong interstellar absorption in the direction of the source does not allow us to exclude completely the presence of main-sequence massive companions MH - United Kingdom MH - Germany MH - Italy MH - Mexico|Baja California PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000167153200020 L2 - pulsars : individual : 1E 1841-045;X-rays : stars;SUPERNOVA REMNANT G27.4+0.0; PHOTOMETRY; SPECTRA; KES-73; STARS SO - Monthly Notices of the Royal Astronomical Society 2001 ;321(1):143-148 3659 UI - 12329 AU - Merino C AU - de Mier A AU - Noy M AD - UNAM, Inst Matemat, Mexico City, DF, MexicoUniv Politecn Catalunya, Dept Matemat Aplicada 2, ES-08034 Barcelona, SpainMerino, C, UNAM, Inst Matemat, Mexico City, DF, Mexico TI - Irreducibility of the Tutte polynomial of a connected matroid AB - We solve in the affirmative a conjecture of Brylawski, namely that the Tutte polynomial of a connected matroid is irreducible over the integers. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0095-8956 UR - ISI:000172349300011 SO - Journal of Combinatorial Theory Series B 2001 ;83(2):298-304 3660 UI - 13905 AU - Merritt D AU - Cruz F AD - Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854, USAUniv Nacl Autonoma Mexico, Observ Astron Nacl, Inst Astron, Ensenada 22860, Baja California, MexicoMerritt, D, Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA TI - Cusp disruption in minor mergers AB - We present 0.55 x 10(6) particle simulations of the accretion of high-density dwarf galaxies by low-density giant galaxies, using models that contain both power-law central density cusps and point masses representing supermassive black holes. The cusp of the dwarf galaxy is disrupted during the merger, producing a remnant with a central density that is only slightly higher than that of the giant galaxy initially. Removing the black hole from the giant galaxy allows the dwarf galaxy to remain intact and leads to a remnant with a high central density, contrary to what is observed. Our results support the hypothesis that the persistence of low-density cores in giant galaxies is a consequence of supermassive black holes MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000168153300010 L2 - galaxies : elliptical and lenticular, cD galaxies : evolution;galaxies : interactions;galaxies : nuclei;CENTRAL BLACK-HOLES; ELLIPTIC GALAXIES; STELLAR-SYSTEMS; EVOLUTION; ORIGIN; FAMILY; MODELS; CORES SO - Astrophysical Journal 2001 ;551(1):L41-L44 3661 UI - 11825 AU - Mesia-Vela S AU - Sanchez RI AU - Estrada-Muniz E AU - avez-Solano D AU - Torres-Sosa C AU - Jimenez-Estrada M AU - Reyes-Chilpa R AU - Kauffman FC AD - Coll Pharm, Lab Cellular & Biochem Toxicol, Piscataway, NJ 08854, USACd Univ, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City, DF, MexicoMesia-Vela, S, Coll Pharm, Lab Cellular & Biochem Toxicol, 41 Gordon Rd, Piscataway, NJ 08854 USA TI - Natural products isolated from Mexican medicinal plants: Novel inhibitors of sulfotransferases, SULT1A1 and SULT2A1 AB - Calophyllum brasiliense, Lonchocarpus oaxacensis, and Lonchocarpus guatemalensis are used in Latin American folk medicine. Four natural xanthones, an acetylated derivative, and two coumarins were obtained from C brasiliense. Two flavanones were extracted from L oaxacensis and one chalcone from L guatemalensis. These compounds were tested as substrates and inhibitors for two recombinant sulfotransferases (SULTs) involved in the metabolism of many endogenous compounds and foreign chemicals. Assays were performed using recombinant phenol-sulfotransferase (SULT1A1) and hydroxysteroidsulfotransferase (SULT2A1). Three of the five xanthones, one of the flavonoids and the coumarins tested were substrates for SULT1A1. None of the xanthones or the flavonoids were sulfonated by SULT2A1, whereas the coumarin mammea A/BA was a substrate for this enzyme. The natural xanthones reversibly inhibited SULT1A1 with IC50 values ranging from 1.6 to 7 muM whereas much higher amounts of these compounds were required to inhibit SULT2A1 (IC50 values of 26-204 muM). The flavonoids inhibited SULT1A1 with IC50 values ranging from 9.5 to 101 muM, which compared with amounts needed to inhibit SULT2A1 (IC50 values of 11 to 101 muM). Both coumarins inhibited SULT1A1 with IC50 values of 47 and 185 muM, and SULT2A1 with IC50 values of 16 and 31 muM. The acetylated xanthone did not inhibit either SULT1A1 or SULT2A1 activity. Rotenone from a commercial source had potency comparable to that of the flavonoids isolated from Lonchocarpus for inhibiting both SULTs. The potency of this inhibition depends on the position and number of hydroxyls. The results indicate that SULT1A1, but not SULT2A1, is highly sensitive to inhibition by xanthones. Conversely, SULT2A1 is 3-6 times more sensitive to coumarins than SULT1A1 The flavonoids are non-specific inhibitors of the two SULTs. Collectively, the results suggest that these types of natural products have the potential for important pharmacological and toxicological interactions at the level of phase-II metabolism via sulfotransferases MH - Mexico|Distrito Federal MH - USA PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0944-7113 UR - ISI:000173677900012 L2 - Calophyllum;Lonchocarpus;sulfotransferases;estradiol;xanthones;coumarins;flavonoids;CALOPHYLLUM; PHENOLSULFOTRANSFERASE; CONSTITUENTS; FLAVONOIDS; XANTHONES; COUMARINS; QUERCETIN; ENZYMES; POTENT; RAT SO - Phytomedicine 2001 ;8(6):481-488 3662 UI - 14305 AU - Meza-Aguilar S AU - Elmouhssine O AU - Dreysse H AU - Demangeat C AD - Inst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, FranceMeza-Aguilar, S, Univ Autonoma Sinaloa, Escuela Ciencias Fisicomatemat, Av Americas & Blvd Univ,Ciudad Univ, Culiacan 80010, Sinaloa, Mexico TI - Two-dimensional surface ordered Mn-Co alloys on Co(001) AB - The spin polarization of various surface alloys of manganese and cobalt on cobalt (001) is determined by the tight-binding linear muffin-tin-orbitals method. An ordered surface alloy restricted to the surface plane i.e., Mn0.5Co0.5/Co(001), is shown to be moro stable as compared to large islands of Mn or Coin the surface plane. The coupling between Mn and Co is found to be antiferromagnetic in the ground stare with a metastable ferromagnetic configuration a few mRy higher in energy. This ferromagnetic coupling between Mn and Co is in agreement with the recent magneto-optical Kerr effect and x-ray magnetic-circular dichroism results. The two-dimensional (and two-layer thick) surface-ordered alloy (Mn0.5Co0.5)(2)/Co(001) is more stable as compared to the perfect Mn monolayer on Co(001) and only solutions with antiferromagnetic couplings between Mn atoms are obtained. A ferromagnetic coupling between the Mn atoms at the surface and the Co atoms in the substrate is the ground state. A buried monolayer of Mn, i.e,, Co/Mn/Co(001), is also found more stable as compared to Mn/Co(001) so that a complete exchange between the surface Mn monolayer and the Co subsurface layer is energetically favorable MH - France MH - Mexico|Sinaloa PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000166911400060 L2 - MAGNETIC-PROPERTIES; FCC CO(001); FE(001); FILMS; MONOLAYER; INTERFACE SO - Physical Review B 2001 ;6305(6): 3663 UI - 14282 AU - Meza-Montes L AU - Hoffmann-Pinther P AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Houston Downtown, Dept Nat Sci, Houston, TX 77002, USAMeza-Montes, L, Univ Autonoma Puebla, Inst Fis, APdo Postal J-48, Puebla 72570, Mexico TI - A note on "A thermodynamic analysis to explain the boiling-point isotope effect for molecular hydrogen" MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Education, Scientific Disciplines U5 - J;Article AV - English IS - 0021-9584 UR - ISI:000167017700041 SO - Journal of Chemical Education 2001 ;78(3):416-417 3664 UI - 12178 AU - Michallet M AU - Delain M AU - Maloisel F AU - Hellmann A AU - Rosas A AU - Silver R AU - Tendler C AD - Hop Edouard Herriot, Lyon, FranceHop Bretonneau, Tours, FranceHop Hautepierre, Strasbourg, FranceUniv Gdansk Med, Gdansk, PolandNatl La Raza Inst Mexicano Seguro Social, Ctr Mexico, Mexico City, DF, MexicoNew York Presbyterian Hosp, New York, NY, USASchering Plough Corp, Kenilworth, NJ 07033, USA TI - Phase III trial of PEG intron vs interferon alfa-2b for the initial treatment of chronic myelogenous leukemia (CML) MH - France MH - Mexico|Distrito Federal MH - Poland MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000172134101471 SO - Blood 2001 ;98(11):348A-348A 3665 UI - 14236 AU - Michaud F AU - Danobeitia JJ AU - Bartolome R AU - Carbonell R AU - Argote LD AU - Cordoba D AU - Monfret T AD - Univ Paris 06, Geosci Azur, F-06235 Villefranche Sur Mer, FranceCSIC, Inst Ciencias Tierra, E-08028 Barcelona, SpainCtr Invest Cient & Educ Super Ensenada, Dept Geol, Ensenada 22830, Baja California, MexicoUniv Complutense Madrid, Dept Geofis, E-28040 Madrid, SpainUniv Nice, Geosci Azur, IRD, F-06560 Valbonne, FranceMichaud, F, Univ Paris 06, Geosci Azur, Quai La Darse,BP 48, F-06235 Villefranche Sur Mer, France TI - Did the East Pacific rise subduct beneath the North America plate (western Mexico)? AB - New data collected between the northernmost tip of the East Pacific rise (18 degrees 05'N, 105 degrees 35'W) and the Middle America trench provide evidence that the seafloor, which lacks significant sedimentary cover, has a typical spreading-derived abyssal hill topography. The tectonic fabric of this seafloor is concave to the west, as it is today at the tip of the East Pacific rise. Farther to the east, at the outer wall of the trench, the seafloor topography exhibits a north-south trending fabric. We suggest that this fabric originated along the East Pacific rise, as it reached the trench and possibly subducted beneath the North America plate prior to the development of the complex connection of the East Pacific rise with the Rivera transform MH - France MH - Mexico|Baja California MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0276-0460 UR - ISI:000167186600005 L2 - TRIPLE JUNCTION AREA; VOLCANIC BELT; COCOS PLATES; ACTIVE FRAGMENTATION; RELATIVE MOTIONS; PROPAGATING RIFT; RIVERA; BOUNDARY; SEGMENTATION; MANZANILLO SO - Geo-Marine Letters 2001 ;20(3):168-173 3666 UI - 13043 AU - Michiue Y AU - Onoda M AU - Watanabe M AU - Brown F AU - Kimizuka N AD - Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, JapanUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoMichiue, Y, Natl Inst Mat Sci, Adv Mat Lab, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan TI - Modulated structure of the pseudohexagonal InFe1-x-4 delta,Tix+3 delta O3+x/2 (x=0.61) composite crystal AB - The structure of pseudohexagonal-type InFe1-x-4 deltaTix+3 deltaO3+x/2 (x = 0.61, delta = 0.04), indium iron titanium oxide, was refined on the basis of a four-dimensional superspace group. The crystal has a compositely modulated structure consisting of two orthorhombic subsystems mutually incommensurate in b. The first subsystem InFe1-x-4 deltaTix+3 deltaO2 has a delafossite structure with lattice parameters a = 5.835 (3), b(1) = 3.349 (1) and c 12.082 (7) Angstrom. The second subsystem with b(2) = 2.568 (6) Angstrom consists of O atoms. The superspace group of the overall structure is Ccmm(1, 1.305, 0)s00, which can be converted to Amam(0, 0, 0.305)0s0 (No. 63.8). Refinement on 1105 unique reflections converged to R = 0.0303 and wR = 0.0325 with 63 structural parameters. The structure of the first subsystem is the alternate stacking of an edge-shared InO6 octahedral layer and an Fe/Ti triangle-lattice plane along c. A sheet of O atoms in the second subsystem is also extending on the Fe/Ti plane, where displacive modulation of atoms is prominent MH - Japan MH - Mexico|Sonora PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Crystallography U5 - J;Article AV - English IS - 0108-7681 UR - ISI:000170560200004 L2 - SUPERSPACE GROUPS; PHASE-RELATIONS; MULTIDIMENSIONAL SPACE; 1100-DEGREES-C; REFINEMENT SO - Acta Crystallographica Section B-Structural Science 2001 ;57():458-465 3667 UI - 12903 AU - Mickelson HR AU - Cordova H AU - Pixley KV AU - Bjarnason MS AD - Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108, USACIMMYT, Mexico City 06600, DF, MexicoCIMMYT, Harare, ZimbabweEuropean Res & Dev Ctr, Pioneer Genet SARL, F-68740 Nambsheim, FranceMickelson, HR, Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108 USA TI - Heterotic relationships among nine temperate and subtropical maize populations AB - The introgression of exotic germplasm could increase the heterosis among maize (Zea mays L.) populations. Our objective was to assess heterotic relationships among BSSS (R) ('Reid' germplasm) and BS 26 ('Lancaster' germplasm) from the temperate USA; the southern African cultivars Salisbury White, Southern Cross, and Natal Potchefstroom Pearl Elite Selection (NPP ES); and the subtropical CIMMYT Populations 34, 42, 44, and 47. The nine cultivars and their diallel crosses were evaluated at five Mexico, Zimbabwe, and U.S. locations. Populations 34, 42, 44, and 47 and NPP ES demonstrated the highest per se grain yield with Population 44 ranking first (8.42 Mg ha(-1)). Low to moderate levels of high parent heterosis was observed for their crosses; nonetheless, they occurred frequently as parents of superior crosses at Mexico where Population 42 X Population 47 ranked first (8.42 Mg ha(-1)). BSSS (R) demonstrated the best general combining ability with variety heterosis effects averaging 1.34 Mg ha(-1). Diversity among varieties was determined on the basis of "dominance-associated" gene effects. When the diversity was resolved by principle coordinate analysis, BSSS (R) was separated from BS 26, and Salisbury White from Southern Cross along different dimensional axes, suggesting that the two pairs are sources of different genes for heterosis. The highest yielding cross (9.28 Mg ha(-1)) and best heterotic combination involved Population 44 and BSSS (R). BSSS (R), NPP ES, and Populations 44 and 42 performed well outside their target ecologic zones, indicating their potential benefit to breeding programs in new geographic areas MH - USA MH - France MH - Mexico|Distrito Federal MH - Zimbabwe PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170881200004 L2 - MAYS L GERMPLASM; COMBINING ABILITY; SELECTION SO - Crop Science 2001 ;41(4):1012-1020 3668 UI - 13121 AU - Mielke EW AU - Schunck FE AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyMielke, EW, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Are axidilaton stars massive compact halo objects? AB - Boson stars built from a very light Kalb-Ramond axion, the dilaton or other moduli fields of effective string models could provide a considerable fraction of the non-baryonic part of dark matter. Gravitational microlensing of similar to0.5 M-circle dot MACHOs within the halo of galaxies may indirectly "weighing" the mass of the constituent scalar particle, resulting in similar to 10(-10) eV/c(2) MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000170261700008 L2 - string model;dilaton star;conformal transformation;PRIMORDIAL BLACK-HOLES; AXI-DILATON GRAVITY; AXIONIC BOSON STARS; STRING THEORY; GENERAL-RELATIVITY; FIELD-EQUATIONS; NEUTRON-STAR; GAUGE-THEORY; QCD EPOCH; COSMOLOGY SO - General Relativity and Gravitation 2001 ;33(5):805-813 3669 UI - 12577 AU - Mielnik B AD - CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoWarsaw Univ, Inst Theoret Phys, Warsaw, PolandMielnik, B, CINVESTAV, Dept Phys, AP 14-740, Mexico City 07000, DF, Mexico TI - Nonlinear quantum mechanics: a conflict with the Ptolomean structure? AB - Extending the argument of Gisin we show that the superluminal signals in the nonlinear quantum mechanics are not a specific difficulty of Weinberg's approach, but a generic phenomenon in all nondissipative quantum theories which try to enlarge the unitary motion group while incorporating the traditional structures of states and observables. The implications exceed the problem of causality. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000171664300001 L2 - nonlinear quantum mechanics;entangled states;superluminal signals;SCHRODINGER-EQUATIONS; DYNAMICS; MODEL SO - Physics Letters A 2001 ;289(1-2):1-8 3670 UI - 14433 AU - Mier MV AU - Callejas RL AU - Gehr R AU - Cisneros BEJ AU - Alvarez PJJ AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 02200, DF, MexicoMcGill Univ, Montreal, PQ H3A 2K6, CanadaUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Iowa, Dept Civil & Environm Engn, Iowa City, IA 52242, USAMier, MV, Univ Autonoma Metropolitana Azcapotzalco, Av San Pablo 180, Mexico City 02200, DF, Mexico TI - Heavy metal removal with Mexican clinoptilolite: Multi-component ionic exchange AB - This paper describes the interactions of Pb(II), Cd(II), and Cr(VI) competing for ion-exchange sites in naturally occurring clinoptilolite. Dissolved Pb and Cd were effectively removed within Ish in batch reactors, with higher removal efficiencies (> 95%) in the acidic pH range. The presence of Cr(VI); which can interact with these metals to form anionic complexes, significantly diminished the Pb and Cd removal efficiencies. A decrease in the efficiency of clinoptilolite to remove Pb was also observed in the high (greater than or equal to 10) pH range. This was attributed to the formation of anionic hydroxo-complexes with little affinity for cationic ion exchange sites. Pb outcompeted Cd for ion exchange sites in a flow-through column packed with clinoptilolite (contact time = 10 s). The preferential removal of Pb in column, but not in batch reactors, reflects that competitive retention can be affected by contact time because diffusion kinetics may influence the removal efficiency to a greater extent than equilibrium partitioning. Phenol, which was tested as a representative organic co-contaminant, slightly hindered heavy metal removal in batch reactors. This was attributed to the formation of organometallic complexes that cannot penetrate the zeolite exchange channels. Altogether, these results show that natural zeolites hold great potential to remove cationic heavy metal species from industrial wastewater. Nevertheless, process efficiency can be hindered by the presence of ligands that form complexes with reduced accessibility and/or affinity for ion exchange. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 51 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000166466700004 L2 - cadmium;chromium;lead;phenol;pH;zeolite;clinoptilolite;NATURAL SEDIMENTARY; ADSORPTION; ZEOLITES; CAPACITY; MODELS; DESIGN SO - Water Research 2001 ;35(2):373-378 3671 UI - 13214 AU - Mier YT AU - Boda D AU - Henderson D AU - Quinones-Cisneros SE AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Veszprem, Dept Chem Phys, H-8201 Veszprem, HungaryBrigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USATech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkHenderson, D, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - On the low temperature anomalies in the properties of the electrochemical interface. A non-local free-energy density functional approach AB - The restricted primitive model has proved to be a useful system to describe the behaviour of electrical double layers. In this model, ions are represented by charged hard spheres of equal diameter and the solvent is represented by a uniform dielectric constant. Classical Gouy-Chapman's theory, and its modification by Stern, always predicts a monotonically decreasing capacitance for this system when the fluid's temperature is increased. Similar results are given by the mean spherical approximation. These predictions are in qualitative agreement with experiment for dissolved electrolytes, but disagree with molten salt experiments where capacitance increases with temperature. Additionally, recent Monte Carlo (MC) simulations for this model show that at very low temperatures, the capacitance of the interface, near its point of zero charge, increases with increasing temperature for both diluted and highly concentrated salts. In this work we apply a particular model of a non-local free-energy density functional theory to study the capacitance of the electrical interface. In our calculations we considered symmetrical 1:1 systems for both diluted electrolytes and highly concentrated salts at very low electrode surface charge. Density functional theory agrees very well with MC results for capacitance at high temperature, but fails to predict a positive slope for this property at low temperatures. Comparison of theoretical density profiles with MC results allows the exploration of possible causes of failure MH - Denmark MH - Hungary MH - Mexico|Distrito Federal MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000170094000008 L2 - ELECTRICAL DOUBLE-LAYER; GOUY-CHAPMAN THEORY; MONTE-CARLO; ELECTROLYTES; FLUIDS SO - Molecular Physics 2001 ;99(15):1323-1328 3672 UI - 13174 AU - Milan Z AU - de las Pozas C AU - Cruz M AU - Borja R AU - Sanchez E AU - Ilangovan K AU - Espinosa Y AU - Luna B AD - CSIC, Inst Grasa, Seville 41012, SpainCtr Nacl Invest Cient, Dept Estudios Sobre Contaminac Ambiental, Havana, CubaUniv Nacl Autonoma Mexico, Coordinac Bioproc Ambientales, Inst Ingn, Mexico City 04510, DF, MexicoBorja, R, CSIC, Inst Grasa, Avda Padre Garcia Tejero 4, Seville 41012, Spain TI - The removal of bacteria by modified natural zeolites AB - The removal effect of natural and modified zeolites containing different heavy metals (Ni2+, Zn2+, Fe3+ and Cu2+) on pure cultures of Escherichia coli and Staphylococcus aureus in a solid medium was evaluated in this work. These experiments were carried out in a continuous mode treating municipal wastewater. Faecal coliform species and Pseudomonas aeruginosa were identified. The rate constants of heavy metal lixiviation were determined using a first order kinetic model. The removal effect of modified natural zeolites in both a solid medium and in continuous mode showed an increased elimination of the bacterial population. The results established a decreasing order of the removal effect as follows: Cu2+ > Fe3+ > Zn2+ > Ni2+. The best performance of columns was obtained for inlet bacterial concentrations below 10(6) cells/100 ml. Most of the identified bacterial species were affected by copper modified zeolites, although Serratia marcescens presented the highest sensitivity and Klebsiella pneumoniae the greatest resistance MH - Cuba MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1093-4529 UR - ISI:000170251700015 L2 - modified natural zeolites;heavy metals;municipal wastewaters;faecal coliforms;removal effect;tertiary treatment;CADMIUM; ZINC; TOXICITY; METALS; COPPER; NICKEL; IONS; MICROORGANISMS; SENSITIVITY; RESISTANCE SO - Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering 2001 ;36(6):1073-1087 3673 UI - 14243 AU - Milcic-Terzic J AU - Lopez-Vidal Y AU - Vrvic MM AU - Saval S AD - Natl Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoNatl Univ Mexico, Fac Med, Mexico City 04510, DF, MexicoUniv Belgrade, Fac Chem, YU-11001 Belgrade, YugoslaviaSaval, S, Natl Univ Mexico, Inst Engn, POB 70472, Mexico City 04510, DF, Mexico TI - Detection of catabolic genes in indigenous microbial consortia isolated from a diesel-contaminated soil AB - Bioremediation is often used for in situ remediation of petroleum-contaminated sites. The primary focus of this study was on understanding the indigenous microbial community which can survive in contaminated environment and is responsible for the degradation. Diesel, toluene and naphthalene-degrading microbial consortia were isolated from diesel-contaminated soil by growing on selective hydrocarbon substrates. The presence and frequency of the catabolic genes responsible for aromatic hydrocarbon biodegradation (xylE, ndoB) within the isolated consortia were screened using polymerase chain reaction PCR and DNA-DNA colony hybridization. The diesel DNA-extract possessed both the xylE catabolic gene for toluene, and the nah catabolic gene for polynuclear aromatic hydrocarbon degradation. The toluene DNA-extract possessed only the xylE catabolic gene, while the naphthalene DNA-extract only the ndoB gene. Restriction enzyme analysis with HaeIII indicated similar restriction patterns for the xylE gene fragment between toluene DNA-extract and a type strain, Pseudomonas putida ATCC 23973. A substantial proportion (74%) of the colonies from the diesel-consortium possessed the xylE gene, and the ndoB gene (78%), while a minority (29%) of the toluene-consortium harbored the xylE gene. 59% of the colonies from the naphthalene-consortium had the ndoB gene, and did not have the xylE gene. These results indicate that the microbial population has been naturally enriched in organisms carrying genes for aromatic hydrocarbon degradation and that significant aromatic biodegradative potential exists I the site. Characterization of the population genotype constitutes a molecular diagnosis which permits the determination of the catabolic potential of the site to degrade the contaminant present. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Yugoslavia PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000167123300007 L2 - bioremediation;catabolic genes;diesel-contaminated soil;indigenous microbial consortia;POLYMERASE CHAIN-REACTION; PSEUDOMONAS-PUTIDA F1; NUCLEOTIDE-SEQUENCE; HYDROCARBON BIODEGRADATION; PETROLEUM-HYDROCARBONS; TOLUENE DEGRADATION; NAPHTHALENE; DNA; POPULATIONS; EXPRESSION SO - Bioresource Technology 2001 ;78(1):47-54 3674 UI - 12344 AU - Miles D AU - Ayoub JPM AU - O'Shaughnessy JA AU - Cervantes G AU - Erikstein B AU - Findlay MPN AU - Gorbounova V AU - Rizel S AU - Verma S AU - Vukelja SJ AD - Guys Hosp, London SE1 9RT, EnglandMontreal Gen Hosp, Montreal, PQ H3G 1A4, CanadaBaylor Sammons Canc Ctr, Dallas, TX, USAUS Oncol, Houston, TX, USAIssste Hosp, Mexico City, DF, MexicoRadiumHosp, Oslo, NorwayWellington Canc Ctr, Wellington, New ZealandRussian Canc Res Ctr, Moscow, RussiaBeilinson Med Ctr, Petah Tiqwa, IsraelCanc Care Ontario, Ottawa, ON, CanadaTyler Canc Ctr, Tyler, TX, USA TI - Survival benefit with Xeloda (capecitabine)/docetaxel vs docetaxel: analysis of post-study therapy MH - Canada MH - United Kingdom MH - Israel MH - Mexico|Distrito Federal MH - New Zealand MH - Norway MH - Russia MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 0167-6806 UR - ISI:000172344800311 SO - Breast Cancer Research and Treatment 2001 ;69(3):287-287 3675 UI - 14153 AU - Milkiewicz P AU - Roma MG AU - Cardenas R AU - Mills CO AU - Elias E AU - Coleman R AD - Univ Birmingham, Sch Biosci, Birmingham B15 2TT, W Midlands, EnglandQueen Elizabeth Hosp, Liver & Hepatobiliary Unit, Birmingham B15 2TH, W Midlands, EnglandUNAM, Fac Sci, Mexico City, DF, MexicoColeman, R, Univ Birmingham, Sch Biosci, Birmingham B15 2TT, W Midlands, England TI - Effect of tauroursodeoxycholate and S-adenosyl-L-methionine on 17 beta-estradiol glucuronide-induced cholestasis AB - Background/Aims: S-adenosyl-L-methionine (SAMe) and tauroursodeoxycholate (TUDC) exert an additive ameliorating effect on taurolithocholate (TLC)-induced cholestasis, The aims were to investigate the protective effect of SAMe on 17beta-estradiol-glucuronide (17 beta EG) cholestasis and to find out whether SAMe and TUDC may exert an additive, ameliorating effect. Methods: Hepatocyte couplet function was assessed by canalicular vacuolar accumulation (cVA) of cholyllysylfluorescein (CLF), Cells were co-treated with 17 beta EG and SAMe, TUDC, or both (protection study), or treated with 17 beta EG and then with SAMe, TUDC or both (reversion study) before CLF uptake. Couplets were also co-treated with SAMe and dehydroepiandrosterone (DHEA), a competitive substrate for the sulfotransferase involved in 17 beta EG detoxification, The effects of 17 beta EG, SAMe and TUDC were also examined on intracellular distribution of F-actin. Results: Both SAMe and TUDC significantly protected against, and reversed, 17 beta EG-induced cholestasis, but their effects were not additive. DHEA abolished the protective effect of SAMe, 17 beta EG did not affect the uptake of CLF into hepatocytes at the concentrations used, and also, it did not affect the intracellular distribution of F-actin. Conclusions: 17 beta EG does not affect the uptake of CLF into hepatocytes, SAMe and TUDC protect and reverse 17 beta EG-induced cholestasis, but without an additive effect. Protection by SAMe may involve facilitating the sulfation of 17 beta EG. (C) 2001 European Association for the Study of the Liver. Published by Elsevier Science B,V, All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0168-8278 UR - ISI:000167482600001 L2 - cholestasis;estrogens;hepatocyte couplets;S-adenosyl-L-methionine;RAT HEPATOCYTE COUPLETS; TIGHT-JUNCTIONAL PERMEABILITY; ESTRADIOL-INDUCED CHOLESTASIS; LIVER PLASMA-MEMBRANE; D-RING GLUCURONIDES; EXPORT PUMP MRP2; ESTROGEN CHOLESTASIS; BILIARY-EXCRETION; BILE-SALTS; TRANSPORT SO - Journal of Hepatology 2001 ;34(2):184-191 3676 UI - 14402 AU - Milkiewicz P AU - Mills CO AU - Hubscher SG AU - Cardenas R AU - Cardenas T AU - Williams A AU - Elias E AD - Queen Elizabeth Hosp, Liver & Hepatobiliary Unit, Liver Res Labs, Birmingham B15 2TH, W Midlands, EnglandUniv Hosp, Dept Pathol, Birmingham, W Midlands, EnglandNatl Autonomous Univ Mexico, Fac Sci, Mexico City 04510, DF, MexicoMilkiewicz, P, Queen Elizabeth Hosp, Liver & Hepatobiliary Unit, Liver Res Labs, Birmingham B15 2TH, W Midlands, England TI - Visualization of the transport of primary and secondary bile acids across liver tissue in rats: in vivo study with fluorescent bile acids AB - Background/Aims: Lysyl fluorescein conjugated bile acid analogues (LFCBAA) closely parallel their natural counter-parts. To assess LFCBAA as a tool for the visualization of bile acid transport within liver tissue. Methods: Wistar rats were administered physiological concentrations of the primary bile acid analogue cholyllysl fluoroscein (CLF) and of the secondary bile acid analogue lithocholyllysyl fluorescein (LLF) and serial liver biopsies were taken at fixed intervals. Both compounds were also injected retrogradely into the biliary tree. Frozen sections were examined by fluorescence microscopy. Results: Both CLF and LLF were rapidly taken up from sinusoidal blood but differed significantly in their hepatic handling. CLF was rapidly transported into bile, whereas LLF transport was slower and produced significantly more bile duct fluorescence. LLF clearance showed a lobular gradient with last remaining bile acid being confined largely to zone 3. Both compounds were avidly taken up by cholangiocytes after injection intravenously or retrogradely into the biliary tree. Conclusions: Visualization of LFCBAA by fluorescence microscopy may yield further information regarding hepatobiliary bile acid localization during studies of physiological and pathological mechanisms involved in transport of bile acids. The presence of both compounds within cholangiocytes strongly suggests that they may undergo a degree of chole-hepatic recirculation. (C) 2001 European Association for the Study of the Liver. Published by Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0168-8278 UR - ISI:000166700800002 L2 - fluorescent bile acids;cholangiocytes;chole-hepatic circulation;HEPATOCYTE COUPLETS; CHOLYL-LYSYLFLUORESCEIN; CANALICULAR FUNCTION; INDUCED CHOLESTASIS; TAUROLITHOCHOLATE; MICROSCOPY; DISRUPTION; INVIVO SO - Journal of Hepatology 2001 ;34(1):4-10 3677 UI - 12477 AU - Mimila-Arroyo J AU - Bland SW AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoIQE Ltd, Cardiff CF3 0EG, S Glam, WalesMimila-Arroyo, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Ing Elect SEES AP 14-740, Mexico City 07000, DF, Mexico TI - Hydrogen co-doping in III-V semiconductors: Dopant passivation and carbon reactivation kinetics in C-GaAs AB - Hydrogen in semiconductors is an electrically active impurity whose interaction with lattice point defects and impurities, might produce a strong modification on their physical behavior, changing some material properties, influencing as well, device performance. In this work we will review the main effects of hydrogen co-doping on the properties crystalline semiconductors, discuss on the driving force on the process of hydrogen incorporation in carbon doped GaAs, grown in the presence of hydrogen. A detailed model on the carbon reactivation kinetics, carbon, doping efficiency and carbon-hydrogen complexes behavior in MOCVD-GaAs epitaxial layers will be presented. Finally, we will discuss die probable relation between the beta evolution of the high frequency and high power n-GaInP/p-GaAs/n-GaAs hetero-junction bipolar transistor (HBT), and the hydrogen co-doping of the C:GaAs, constituting its base MH - Mexico|Distrito Federal MH - United Kingdom PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900005 L2 - CHEMICAL VAPOR-DEPOSITION; MOLECULAR-BEAM EPITAXY; DOPED GAAS; THERMAL-STABILITY SO - Modern Physics Letters B 2001 ;15(17-19):585-592 3678 UI - 12513 AU - Mimila-Arroyo J AU - Lusson A AU - Chevallier J AU - Barbe M AU - Theys B AU - Jomard F AU - Bland SW AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoInst Politecn Nacl, Esc Sup Ing Mecan & Elect, Mexico City 07000, DF, MexicoLab Pys Solides & Cristalogenese, CNRS, UMR, Meudon, FranceIQE Europe Ltd, Cardiff CF3 0EG, S Glam, WalesMimila-Arroyo, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, AP 14-740, Mexico City 07000, DF, Mexico TI - Carbon acceptor doping efficiency in GaAs grown by metalorganic chemical vapor deposition AB - Carbon doping efficiency in GaAs grown by metalorganic chemical vapor deposition using intrinsic and extrinsic doping sources is studied. Independent of the carbon source, carbon hydrogen complexes are systematically present and depending on the growth conditions, carbon dimers can be present and form complexes with hydrogen as well. Carbon-hydrogen related complexes and dimers reduce the hole concentration decreasing the doping efficiency. Additionally, the carbon dimer introduces a deep level, decreases the hole mobility and hydrogen bonds stronger to it than to isolated carbon. Depending on the growth conditions it is possible to reach 100% doping efficiency with high hole mobility. (C) 2001 American Institute of Physics MH - France MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000171896600027 L2 - MOLECULAR-BEAM EPITAXY; HYDROGEN; LAYERS SO - Applied Physics Letters 2001 ;79(19):3095-3097 3679 UI - 14044 AU - Minder AC AU - de Rudder KEE AU - Narberhaus F AU - Fischer HM AU - Hennecke H AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoETH Zurich, Inst Mikrobiol, CH-8092 Zurich, SwitzerlandTech Univ Berlin, Inst Biotechnol, D-13353 Berlin, GermanyGeiger, O, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apdo Postal 565-A,CP62210, Cuernavaca, Morelos, Mexico TI - Phosphatidylcholine levels in Bradyrhizobium japonicum membranes are critical for an efficient symbiosis with the soybean host plant AB - Phosphatidycholine (PC), the major membrane phospholipid in eukaryotes, is found in only some bacteria including members of the family Rhizobiaceae. For this reason, it has long been speculated that rhizobial PC might be required for a successful interaction of rhizobia with their legume host plants in order to allow the formation of nitrogen-fixing root nodules. A major pathway for PC formation in prokaryotes involves a threefold methylation of the precursor phosphatidylethanolamine (PE). Here, we report on the isolation of a Bradyrhizobium japonicum gene (pmtA) encoding the phospholipid N-methyltransferase PmtA. Upon expression of the bradyrhizobial pmtA gene in Escherichia coli, predominantly monomethylphosphatidylethanolamine was formed from PE. PmtA-deficient B. japonicum mutants still produced low levels of PC by a second methylation pathway. The amount of PC formed in such mutants (6% of total phospholipids) was greatly decreased compared with the wild type (52% of total phospholipids). Root nodules of soybean plants infected with B. japonicum pmtA mutants showed a nitrogen fixation activity of only 18% of the wild-type level. The interior colour of the nodules was beige instead of red, suggesting decreased amounts of leghaemoglobin. Moreover, ultrastructure analysis of these nodules demonstrated a greatly reduced number of bacteroids within infected plant cells. These data suggest that the biosynthesis of wild-type amounts of PC are required to allow for an efficient symbiotic interaction of B. japonicum with its soybean host plant MH - Germany MH - Mexico|Morelos MH - Switzerland PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000167644400008 L2 - PHOSPHATIDYLETHANOLAMINE N-METHYLTRANSFERASE; HEAT-SHOCK GENES; RHIZOBIUM-JAPONICUM; SINORHIZOBIUM-MELILOTI; RNA-POLYMERASE; CLONING; BIOSYNTHESIS; EXPRESSION; CONSTRUCTION; MUTAGENESIS SO - Molecular Microbiology 2001 ;39(5):1186-1198 3680 UI - 13500 AU - Minkovich VP AU - Starodumov AN AU - Borisov VI AU - Lebedev VI AU - Perepechko SN AD - Ctr Invest Opt, Leon 37150, Gto, MexicoMogilev State Univ, Mogilev 212022, ByelarusMinkovich, VP, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - Temporal interference of coherent laser pulses in optical fibers AB - We report on collective effects for the train of optical pulses when a reproduction of the periodical pulse train occurs at some distance in dispersive medium. The reproduction of the initial temporal distribution can be treated as a temporal analog of the spatial Talbot effect. In experiment with a multimode fiber, the group of seven pulses lost its temporal shape converting in one broad pulse at the distance of 1200 m, while continuous train of pulse preserved its temporal structure. (C) 2001 Elsevier Science B.V. All rights reserved MH - Byelarus MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000169163000013 L2 - optical fibers;dispersion;Talbot effect;SOLITONS SO - Optics Communications 2001 ;192(3-6):231-235 3681 UI - 13649 AU - Minkovich VP AU - Starodumov AN AU - Marochkov AV AD - Ctr Invest Opt, Leon 37150, GTO, MexicoCent Reg Hosp, Mogilev 212030, ByelarusMinkovich, VP, Ctr Invest Opt, Leon 37150, GTO, Mexico TI - Changes in transmission spectrum of human venous blood under action of low-intensity He-Ne laser AB - We report experimental evidence of light-induced changes in the transmission spectrum of human venous blood under the action of low-intensity radiation from He-Ne laser. The transmission spectra of diluted and nondiluted heparinized human blood have been analyzed before, after and in the course of irradiation. When irradiating diluted blood, no changes in the blood spectrum have been detected. However, irradiating nondiluted blood, the reproducible variations of the blood transmission spectrum in the range of 640-805 nm have been observed. These changes correlate with oxygen saturation. The decreased oxygen saturation in venous blood is stabilized at the level of about 70-80% from the initial one after 5-8 procedures of laser il radiation. The decrease of oxygen saturation in venous blood after the course of treatment means that irradiation of He-Ne laser permits an addition quantity of oxygen to be involved in exchange processes. The changes of oxygen saturation in venous blood after 1-3 procedures of irradiation can be used as a method to detect an individual sensitivity to intravein laser irradiation MH - Byelarus MH - Mexico|Guanajuato PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000168845300011 L2 - IRRADIATION SO - Laser Physics 2001 ;11(5):632-635 3682 UI - 12471 AU - Minzoni AA AU - Smyth NF AU - Worthy AL AD - Univ Edinburgh, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Nacl Autonoma Mexico, IIMAS, Dept Math & Mech, FENOMEC, Mexico City 01000, DF, MexicoUniv Wollongong, Sch Math & Appl Stat, Wollongong, NSW 2522, AustraliaSmyth, NF, Univ Edinburgh, Dept Math & Stat, Kings Bldg, Edinburgh EH9 3JZ, Midlothian, Scotland TI - Pulse evolution for a two-dimensional Sine-Gordon equation AB - The evolution lump and ring solutions of a Sine-Gordon equation in two-space dimensions is considered. Approximate equations governing this evolution are derived using a pulse or ring with variable parameters in an averaged Lagrangian for the Sine-Gordon equation. It was found by Neu [Physica D 43 (1990) 421] that angular variations of the pulse shape may stabilise it. However, no study of the radiation produced by the pulse was available. In the present work, the coupling of the pulse to the shed radiation is considered. It is shown both asymptotically and numerically that the angular dependence produces spiral waves which shed angular momentum, leading to the ultimate collapse of the pulse. Good quantitative agreement between the asymptotic and numerical solutions is found. In addition, it is shown how the results of the present work can be applied to the Baby Skyrme model. In this regard, it is shown how the non-zero degree of solutions of the Baby Skyrme model prevents the collapse of a non-zero degree pulse shedding zero degree radiation. It is also indicated how the present results could be applied to the study of vortex models. The analysis presented in this work shows how complicated behaviour due to radiation of angular momentum can be captured in simple terms by approximate equations for the relevant degrees of freedom. (C) 2001 Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000171928100007 L2 - modulation theory;Sine-Gordon equation;skyrmion SO - Physica D 2001 ;159(1-2):101-123 3683 UI - 13023 AU - Miramontes O AU - Sole RV AU - Goodwin BC AD - Univ Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 1000, DF, MexicoUniv Politecn Catalunya, Complex Syst Res Grp, Dept Fis & Engn Nucl, ES-08034 Barcelona, SpainSanta Fe Inst, Santa Fe, NM 87501, USASchumacher Coll, Dartington TQ9 6EA, Devon, EnglandMiramontes, O, Univ Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Ciudad Univ, Mexico City 1000, DF, Mexico TI - Neural networks as sources of chaotic motor activity in ants and how complexity develops at the social scale AB - We discuss a Neural Network model generating activation signals for locomotion in ants. The signals are chaotic and so are the temporal patterns of spontaneous activations in single ants. Active ants are able to move and interact with other nest mates. This process of movement-interaction generates periodic pulses of activity once the number of individuals reaches a certain density value. An algorithmic complexity measure is used for identifying accurately the transition from chaos into order. Finally, an Iterated Function System analysis reveals the richness of dynamical behavior that emerges when ant colonies are self-poised near such a transition MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000170610400006 L2 - MOBILE CELLULAR-AUTOMATA; TERM ACTIVITY CYCLES; BEHAVIOR; VISUALIZATION; SEQUENCES; DYNAMICS; MODEL; EDGE SO - International Journal of Bifurcation and Chaos 2001 ;11(6):1655-1664 3684 UI - 14339 AU - Miranda-Valenzuela JC AU - Muci-Kuchler KH AU - Soriano-Soriano S AD - Univ Detroit Mercy, Detroit, MI 48219, USAWessex Inst Technol, Southampton SO40 7AA, Hants, EnglandProlec GE, Power Div, Apodaca 66600, NL, MexicoMuci-Kuchler, KH, Univ Detroit Mercy, Detroit, MI 48219, USA TI - Adaptive meshing for two-dimensional thermoelastic problems using Hermite boundary elements AB - In the present work, error indicators for the potential and elastostatic problems are used in a combined fashion to implement an adaptive meshing scheme for the solution of two-dimensional steady-state thermoelastic problems using the Boundary Element Method. These error indicators exploit in their formulation the possibility of generating two different numerical solutions from just one analysis using Hermite elements. The first solution is the standard one obtained from an analysis using Hermite elements. The second is a "reduced" solution obtained representing the field variables inside an element using some of the degrees of freedom of the Hermite element together with Lagrangian shape functions. The basic idea behind the computation of the error indicator is to compare these two solutions, on an element by element basis, to obtain an estimate of the magnitude of the error in the numerical solution corresponding to the Hermite elements. In this sense, it is assumed that the bigger the difference between these two solutions, the bigger the error in the original solution with Hermite elements. Since the thermoelastic problem in its uncoupled fashion is considered, the former approach is applied to both problems, heat conduction and thermoelastic. Since both numerical solutions for each one of these problems are obtained from just one analysis, the computational cost of the proposed error indicators is very low. (C) 2001 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering U5 - J;Article AV - English IS - 0965-9978 UR - ISI:000166926400001 L2 - adaptive meshing;error estimation;hermite boundary elements;hypersingular boundary integral equations;thermoelastic problems;ERROR ESTIMATION; INTEGRAL-EQUATIONS; POTENTIAL PROBLEMS; REFINEMENT; FORMULATION; ELASTICITY SO - Advances in Engineering Software 2001 ;32(3):171-188 3685 UI - 12667 AU - Miranda A AU - Salgado S AU - Vera JM AU - guilar-Cordova E AU - Segura J AU - rmendariz-Borunda J AD - Univ Guadalajara, Guadalajara 44430, Jalisco, MexicoHarvard Univ, Gene Therapy Initiat, Boston, MA 02115, USA TI - Co-adyuvant effect of human UPA gene therapy and bilio-digestive anastomosis to reverse experimental secondary biliary cirrhosis MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000171224700826 SO - Hepatology 2001 ;34(4):380A-380A 3686 UI - 12367 AU - Miranda LF AU - Gomez Y AU - Anglada G AU - Torrelles JM AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACSIC, IEEC, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainMiranda, LF, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004, E-18080 Granada, Spain TI - Water-maser emission from a planetary nebula with a magnetized torus AB - A star like the Sun becomes a planetary nebula towards the end of its life, when the envelope ejected during the earlier giant phase becomes photoionized as the surface of the remnant star reaches a temperature of similar to 30,000 K. The spherical symmetry of the giant phase is lost in the transition to a planetary nebula, when nonspherical shells and powerful jets develop. Molecules that were present in the giant envelope are progressively destroyed by the radiation(1). The water-vapour masers that are typical of the giant envelopes(2,3) therefore are not expected to persist in planetary nebulae(1,4). Here we report the detection of water-maser emission from the planetary nebula K3-35. The masers are in a magnetized torus with a radius of about 85 astronomical units and are also found at the surprisingly large distance of about 5,000 astronomical units from the star, in the tips of bipolar lobes of gas. The precessing jets from K3-35 are probably involved in the excitation of the distant masers, although their existence is nevertheless puzzling. We infer that K3-35 is being observed at the very moment of its transformation from a giant star to a planetary nebula MH - Mexico|Michoacan MH - Spain MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 40 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000172150700036 L2 - STAR-FORMING REGIONS; H2O MASERS; PROTOPLANETARY NEBULA; RADIO MORPHOLOGY; EVOLVED STARS; YOUNG; BIPOLAR; K-3-35 SO - Nature 2001 ;414(6861):284-286 3687 UI - 14040 AU - Miranda LF AU - Torrelles JM AU - Guerrero MA AU - Vazquez R AU - Gomez Y AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainCSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainUniv Illinois, Dept Astron, Urbana, IL 61801, USAUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoMiranda, LF, CSIC, Inst Astrofis Andalucia, Apdo Correos 3004, E-18080 Granada, Spain TI - Morphological and kinematic signatures of a binary central star in the planetary nebula Hu 2-1 AB - We present H alpha, [N II] and [O III] ground-based and HST archive images, VLA-A 3.6-cm continuum and H92 alpha emission-line data and high-resolution long-slit [N II] spectra of the planetary nebula Hu 2-1. A large number of structural components are identified in the nebula: an outer bipolar and an inner shell, two pairs of collimated bipolar structures at different directions, monopolar bow-shock-like structures, and an extended equatorial structure within a halo. The formation of Hu 2-1 appears to be dominated by anisotropic mass ejection during the late-AGB stage of the progenitor and by variable, 'precessing' collimated bipolar outflows during the protoplanetary nebula and/or early planetary nebula phases. Different observational results strongly support the existence of a binary central star in Hu 2-1, among them (1) the observed point-symmetry of the bipolar lobes and inner shell, and the departures from axial symmetry of the bipolar lobes, (2) the off-centre position of the central star, (3) the detection of mass ejection towards the equatorial plane, and (4) the presence of 'precessing' collimated outflows. In addition, (5) an analysis of the kinematics shows that the systemic velocity of the bipolar outflows does not coincide with the systemic velocity of the bipolar shell. We propose that this velocity difference is a direct evidence of orbital motion of the ejection source in a binary system. From a deduced orbital velocity of similar to 10 km s(-1), a semimajor axis of similar to9-27 au and period of similar to 25-80 yr are obtained, assuming a reasonable range of masses. These parameters are used to analyse the formation of Hu 2-1 within current scenarios of planetary nebulae with binary central stars MH - Mexico|Baja California MH - Mexico|Michoacan MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000167629600011 L2 - stars : mass-loss;ISM : jets and outflows;ISM : kinematics and dynamics;planetary nebulae : individual : Hu 2-1;BIPOLAR PREPLANETARY NEBULAE; POINT-SYMMETRICAL NEBULAE; ACCRETION DISKS; WIDE BINARIES; HM-SAGITTAE; DUSTY WINDS; JETS; RESOLUTION; HYDRODYNAMICS; SYSTEMS SO - Monthly Notices of the Royal Astronomical Society 2001 ;321(3):487-496 3688 UI - 12319 AU - Miranda OG AU - Pena-Garay C AU - Rashba TI AU - Semikoz VB AU - Valle JWF AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Valencia, CSIC, Inst Fis Corpuscular, Edif Inst, E-46071 Valencia, SpainRussian Acad Sci, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk, Moscow Region, RussiaMiranda, OG, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - A non-resonant dark-side solution to the solar neutrino problem AB - We reanalyse spin-flavour precession solutions to the solar neutrino problem in the light of the recent SNO CC result as well as the 1258-day Super-Kamiokande data and the upper limit on solar anti-neutrinos. In a self-consistent magnetohydrodynamics approach the resulting scheme has only 3 effective parameters: Deltam(2), muB(perpendicular to) and the neutrino mixing angle theta. We show how a rates-only analysis for fixed muB(perpendicular to) slightly favours spin-flavour precession (SFP) solutions over oscillations (OSC). In addition to the resonant solution (RSFP for short), there is a new non-resonant solution (NRSFP) in the "dark-side". Both RSFP and NRSFP lead to flat recoil energy spectra in excellent agreement with the latest Super-Kamiokande data. We also show that in the presence of a neutrino transition magnetic moment of 10-(11) Bohr magneton, a magnetic field of 80 KGauss eliminates all large mixing solutions other than the so-called LMA solution. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 26 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172360100024 L2 - neutrino oscillations;solar neutrinos;neutrino mass and mixing;neutrino magnetic moment;SPIN-FLAVOR PRECESSION; SUPER-KAMIOKANDE; CAPTURE RATE; FLUX; OSCILLATIONS; MATTER SO - Physics Letters B 2001 ;521(3-4):299-307 3689 UI - 13982 AU - Miranda OG AU - Pena-Garay C AU - Rashba TI AU - Semikoz VB AU - Valle JWF AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Valencia, CSIC, Inst Fis Corpuscular, Edificio Inst Paterna, Valencia 46071, SpainRussian Acad Sci, IZMIRAN, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk 143190, Moscow Region, RussiaMiranda, OG, Inst Politecn Nacl, CINVESTAV, Dept Fis, AP 14-470, Mexico City 07000, DF, Mexico TI - Solar neutrino problem accounting for self-consistent magnetohydrodynamics solution for solar magnetic fields AB - The analysis of the resonant spin-flavour (RSF) solutions to the solar neutrino problem in the framework of simplest analytic solutions to the solar magneto-hydrodynamics (MHD) equations is presented. We performed the global fit of the recent solar neutrino data, including event rates as well as zenith angle distributions and recoil electron spectra induced by solar neutrino interactions in SuperKamiokande. We compare quantitatively our simplest MHD-RSF fit with vacuum oscillation (VAC) and MSW-type (SMA, LMA and LOW) solutions to the solar neutrino problem using a common well-calibrated theoretical calculation and fit procedure and find MHD-RSF fit to be somewhat better than those obtained for the favored neutrino oscillation solutions. We made the predictions for future experiments to disentangle the MHD-RSF scenario from other scenarios MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000167811600024 L2 - SUPER-KAMIOKANDE; RESONANT AMPLIFICATION; MATTER; FLUX; OSCILLATIONS; ROTATION; DYNAMO; SPECTROSCOPY SO - Nuclear Physics B-Proceedings Supplements 2001 ;95():123-129 3690 UI - 14309 AU - Miranda OG AU - Pena-Garay C AU - Rashba TI AU - Semikoz VB AU - Valle JWF AD - Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia 46071, SpainInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoRussian Acad Sci, Inst Terr Magnetism Ionosphere & Radio Wave P, Troitsk 142092, Moscow Region, RussiaValle, JWF, Univ Valencia, CSIC, Inst Fis Corpuscular, Edificio Inst Paterna,Apartado Correos 2085, Valencia 46071, Spain TI - The simplest resonant spin-flavour solution to the solar neutrino problem AB - We re-analyse the resonant spin-flavour (RSF) solutions to the solar neutrino problem in the framework of analytic solutions to the solar magneto-hydrodynamics (MHD) equations. By substantially eliminating the arbitrariness associated to the magnetic field profile due to both mathematical consistency and physical requirements we propose the simplest scheme (MHD-RSF, for short) for solar neutrino conversion using realistic static MHD solutions. Using such effective two-parameter scheme we perform the first global fit of the recent solar neutrino data, including event rates as well as zenith angle distributions and recoil electron spectra induced by solar neutrino interactions in SuperKamiokande. We compare quantitatively our simplest MHD-RSF fit with vacuum oscillation (VAC) and MSW-type (SMA, LMA and LOW) solutions to the solar neutrino problem using a common well-calibrated theoretical calculation and fit procedure. We find our MHD-RSF fit to be somewhat better than those obtained for the favored neutrino oscillation solutions, though not in a statistically significant way with Deltam(2) approximate to 10(-8) eV(2) and sin(2) 2 theta = 0. We briefly discuss the prospects to disentangle our MHD-RSF scenario from oscillation-type solutions to the solar neutrino problem at future solar neutrino experiments, giving some predictions for the SNO experiment. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 39 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000166912800016 L2 - MAGNETIC-FIELDS; FLUX; OSCILLATIONS; MATTER; DYNAMO; ROTATION; AMPLIFICATION; SPECTROSCOPY SO - Nuclear Physics B 2001 ;595(1-2):360-380 3691 UI - 12258 AU - Mireles J AU - Lewis FL AD - Univ Autonoma Ciudad Juarez, Juarez, MexicoUniv Texas, Automat & Robot Res Inst, Ft Worth, TX 76118, USAMireles, J, Univ Autonoma Ciudad Juarez, Juarez, Mexico TI - Intelligent material handling: Development and implementation of a matrix-based discrete-event controller AB - A supervisory controller for discrete-event (DE) systems is presented that uses a novel matrix formulation. This matrix formulation makes it direct to write down the DE controller from standard manufacturing tools such as the bill of materials or the assembly tree. The matrices also make it straightforward to actually implement the DE controller on a manufacturing workcell for sequencing the jobs and assigning the resources. It is shown that the DE controller equations plus the Petri net marking transition equation together provide a complete dynamical description of a DE system. This means that a computer simulation can be performed to check the DE performance of the controller before it is implemented. In this paper, we implement the DE controller con an actual three-robot intelligent material handling cell at the Automation and Robotics Research Institute, University of Texas at Arlington. Then, we show that the actual implementation and the simulated system give commensurate results. The versatility of the system developed with this DE controller permits implementing different methodologies for conflict resolution, as well as optimization of the resource assignment and part throughput. Technical information given includes the development of the controller in Lab-VIEW and its simulation using MATLAB MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 9 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0278-0046 UR - ISI:000172569400006 L2 - discrete-event systems;flexible manufacturing systems;intelligent control;Petri nets;reentrant flow lines;FLEXIBLE MANUFACTURING SYSTEMS; PERFORMANCE EVALUATION; DEADLOCK; AVOIDANCE; NETS SO - Ieee Transactions on Industrial Electronics 2001 ;48(6):1087-1097 3692 UI - 13821 AU - Mirman B AU - Borovikov V AU - Ladyzhensky L AU - Vinograd R AD - BUAP, Puebla, MexicoSuffolk Univ, Boston, MA, USAMirman, B, 1 3rd St, Lexington, MA 02420, USA TI - Numerical ranges, Poncelet curves, invariant measures AB - A class of closed algebraic curves (circuits) is considered. These circuits have the property of Poncelet quadrics. The circuits are generated by matrices which admit unitary bordering, The link between spectral properties of the matrices and geometrical properties of the circuits is studied. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Puebla MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0024-3795 UR - ISI:000168234800004 L2 - unitary dilation;Poncelet configuration SO - Linear Algebra and Its Applications 2001 ;329(1-3):61-75 3693 UI - 13695 AU - Misicu S AU - Hess PO AU - Greiner W AD - Univ Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, GermanyNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMisicu, S, Univ Frankfurt, Inst Theoret Phys, Robert Mayer Str 8-10, D-60325 Frankfurt, Germany TI - Collective spectra of alpha-like giant trinuclear molecules AB - The collective rotational-vibrational spectrum of a giant trinuclear molecule is computed for the case when the clusters which are composing this exotic nuclear system are spherical. Special attention is paid to the case of a triangular configuration which corresponds to an absolute minimum in the total ternary potential and in our view is a good candidate for a molecular configuration. Although the coupling between different included collective degrees of freedom looks rather complicated it is shown that by expanding the Hamiltonian operator around the equilibrium values and retaining only the first term a satisfactory approximation in building the molecular spectrum is obtained. For the sake of completeness we compare the above-mentioned molecular spectrum with that obtained in the case of the linear molecule. We consider as an application the splitting Sn-132+ alpha + Pd-116 which occurs in the alpha-accompanied ternary cold fission of Cf-252 MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000168640900016 L2 - NEUTRONLESS FISSION; CF-252; DIMERS; STATES; MODES; BE-10 SO - Physical Review C 2001 ;6305(5): 3694 UI - 12679 AU - Mjaatvedt CH AU - Nakaoka T AU - Moreno-Rodriguez R AU - Norris RA AU - Kern MJ AU - Eisenberg CA AU - Turner D AU - Markwald RR AD - Med Univ S Carolina, Dept Cell Biol & Anat, Charleston, SC 29425, USAUniv Tokyo, Inst Med Sci, Dept Adv Med Sci, Minato Ku, Tokyo 1088639, JapanHosp Infantil Mexico Dr Federico Gomez, Doctores 06720, DF, MexicoMjaatvedt, CH, Med Univ S Carolina, Dept Cell Biol & Anat, 171 Ashley Ave,Suite 601, Charleston, SC 29425 USA TI - The outflow tract of the heart is recruited from a novel heart-forming field AB - As classically described, the precardiac mesoderm of the paired heart-forming fields migrate and fuse anteriomedially in the ventral midline to form the first segment of the straight heart tube. This segment ultimately forms the right trabeculated ventricle. Additional segments are added to the caudal end of the first in a sequential fashion from the posteriolateral heart-forming field mesoderm. In this study we report that the final major heart segment, which forms the cardiac outflow tract, does not follow this pattern of embryonic development. The cardiac outlet, consisting of the corms and truncus, does not derive from the paired heart-forming fields, but originates separately from a previously unrecognized source of mesoderm located anterior to the initial primitive heart tube segment. Fate-mapping results show that cells labeled in the mesoderm surrounding the aortic sac and anterior to the primitive right ventricle are incorporated into both the corms and the truncus. Conversely, if cells are labeled in the existing right ventricle no incorporation into the cardiac outlet is observed. Tissue explants microdissected from this anterior mesoderm region are capable of forming beating cardiac muscle in vitro when cocultured with explants of the primitive right ventricle. These findings establish the presence of another heart-forming field. This anterior heart-forming field (AHF) consists of mesoderm surrounding the aortic sac immediately anterior to the existing heart tube. This new concept of the heart outlet's embryonic origin provides a new basis for explaining a variety of gene-expression patterns and cardiac defects described in both transgenic animals and human congenital heart disease. (C) 2001 Academic Press MH - Japan MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 147 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000171505100008 L2 - embryo;heart;heart defects;congenital;gene expression regulation;developmental;embryonic induction;mesoderm;cell differentiation;morphogenesis;microinjections;tissue culture;BONE-MORPHOGENETIC PROTEIN-4; OUTLET RIGHT VENTRICLE; CELL-LINE QCE-6; CARDIAC MORPHOGENESIS; MUTANT MOUSE; CARDIOVASCULAR MALFORMATIONS; TRUNCUS ARTERIOSUS; CHICK-EMBRYO; NEURAL CREST; GENE SO - Developmental Biology 2001 ;238(1):97-109 3695 UI - 12873 AU - Mochan WL AU - Brudny WL AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaMochan, WL, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Comment on "Noncausal time response in frustrated total internal reflection?" MH - Argentina MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0031-9007 UR - ISI:000170984600046 L2 - PROPAGATION SO - Physical Review Letters 2001 ;8711(11):art-119101 3696 UI - 13217 AU - Modlin JF AU - Snider DE AU - Brooks DA AU - Clover RD AU - Guerra FA AU - Helms CM AU - Johnson DR AU - Le CT AU - Offit PA AU - Rennels MB AU - Tompkins LS AU - Word BM AU - Bradshaw D AU - Cheek JE AU - Evans GS AU - Graydon TR AU - Myers MG AU - Heilman C AU - Midthun K AU - Myers MG AU - Nichol KL AU - Mahoney M AU - Pickering L AU - Abramson J AU - France EK AU - Gall SA AU - Gardner P AU - Schaffner W AU - Wilson HD AU - McKinney WP AU - Marchessault V AU - Siegel JD AU - Katz SL AU - Santos JI AU - Jackson RE AU - Peter G AU - Howe BJ AU - Ashford DA AU - Perkins B AU - Rotz LD AD - Dartmouth Med Sch, Lebanon, NH 03756, USACtr Dis Control & Prevent, Atlanta, GA, USAJohnson Med Ctr, Baltimore, MD, USAUniv Louisville, Sch Med, Louisville, KY 40292, USASan Antonio Metropolitan Hlth Dist, San Antonio, TX, USAUniv Iowa Hosp & Clin, Iowa City, IA 52242, USAMichigan Dept Community Hlth, Lansing, MI, USAKaiser Permanente Med Ctr, Santa Rosa, CA, USAChildrens Hosp Philadelphia, Philadelphia, PA 19104, USAUniv Maryland, Sch Med, Baltimore, MD 21201, USAStanford Univ, Med Ctr, Stanford, CA 94305, USASUNY Stony Brook, Stony Brook, NY 11794, USA, USAF, Med Operat Agcy, Washington, DC 20330 USAIndian Hlth Serv, Albuquerque, NM, USAUS Hlth Resources & Serv Adm, Rockville, MD 20857, USAUS Hlth Care Financing Adm, Baltimore, MD 21207, USANIH, Bethesda, MD 20892, USAUS FDA, Bethesda, MD 20014, USAVA Med Ctr, Minneapolis, MN, USAAmer Acad Family Physicians, Clarence, NY, USAAmer Acad Pediat, Norfolk, VA, USAAmer Assoc Hlth Plans, Denver, CO, USAAmer Coll Obstetricians & Gynecologists, Louisville, KY, USAAmer Coll Phys, Stony Brook, NY, USAAmer Hosp Assoc, Nashville, TN, USAAmer Med Assoc, Grand Forks, ND, USAAssoc Teachers Prevent Med, Louisville, KY, USACanadian Natl Advisory Comm Immunizat, Cumberland, ON, CanadaHealthcare Infect Control Practices Advisory Comm, Dallas, TX, USAInfect Dis Soc Amer, Durham, NC, USANatl Immunizat Council & Child Hlth Program, Mexico City, DF, MexicoNatl Med Assoc, Atlanta, GA, USANatl Vaccine Advisory Comm, Providence, RI, USAPharmaceut Res & Manufacturers Amer, Collegeville, PA, USAModlin, JF, Dartmouth Med Sch, Lebanon, NH 03756, USA TI - Use of anthrax vaccine in the United States: Recommendations of the advisory committee on immunization practices (Reprinted from Morbidity and Mortality Weekly Report, vol 49, pg 1-20, 2000) MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Toxicology U5 - J;Article AV - English IS - 0731-3810 UR - ISI:000170067300014 L2 - BACILLUS-ANTHRACIS; INHALATION ANTHRAX; BIOLOGICAL WARFARE; COMPARATIVE EFFICACY; PROTECTIVE ANTIGEN; LETHAL FACTOR; GUINEA-PIGS; ANTIBODIES; MANAGEMENT; OUTBREAK SO - Journal of Toxicology-Clinical Toxicology 2001 ;39(1):85-100 3697 UI - 13838 AU - Mohapatra RN AU - Pires CAD AU - Perez-Lorenzana A AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAUniv Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estud Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Cosmology of brane-bulk models in five dimensions AB - We study the cosmology of models with four space and one time dimension where our universe is a three-brane and report a few results which extend existing work in several directions. Assuming a stable fifth dimension, we obtain a solution for the metric, which does not depend on any arbitrary parameters. We discuss some implications of this result MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 24 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000168292300006 L2 - EXTRA DIMENSION; SUBMILLIMETER DIMENSIONS; QUANTUM-GRAVITY; ART.; INFLATION; COMPACTIFICATION; HIERARCHY; PHENOMENOLOGY; MILLIMETER; BOUNDARY SO - International Journal of Modern Physics A 2001 ;16(8):1431-1442 3698 UI - 14443 AU - Mohapatra RN AU - Perez-Lorenzana A AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoPerez-Lorenzana, A, AS ICTP HE Grp, Rm 266,Strada Costiera 11, I-34100 Trieste, Italy TI - Three flavour neutrino oscillations in models with large extra dimensions AB - The key challenges for models with large extra dimensions, posed by neutrino physics are: first to understand why neutrino masses are small and second, whether one can have a simultaneous explanation of all observed oscillation phenomena. There exist models that answer the first challenge by using singlet bulk neutrinos coupled to the standard model in the brane. Our goal in this paper is to see to what extent the simplest versions of these models can answer the second challenge. Our conclusion is that the minimal framework that has no new physics beyond the above simple picture cannot simultaneously explain solar, atmospheric and LSND data, whereas there are several ways that it can accommodate the first two. This would suggest that confirmation of LSND data would indicate the existence of new physics either in the brane or in extra dimensions or both, if indeed it turns out that there are large extra dimensions. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 42 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000166483400003 L2 - SCALE; TEV; MILLIMETER; SPACETIME; GRAVITY; MASSES SO - Nuclear Physics B 2001 ;593(3):451-470 3699 UI - 12148 AU - Moitinho A AU - Alves J AU - Huelamo N AU - Lada CJ AD - UNAM, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoEuropean So Observ, D-85748 Garching, GermanyMax Planck Inst Extraterr Phys, D-85741 Garching, GermanyHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAMoitinho, A, UNAM, Observ Astron Nacl, Apartado Postal 877, Ensenada 22800, Baja California, Mexico TI - NGC 2362: A template for early stellar evolution AB - We present UBVRI photometry for the young open cluster NGC 2362. From analysis of the appropriate color-color and color-magnitude diagrams we derive the fundamental parameters of the NGC 2362 cluster to be age = 5(-2)(+1) Myr, distance = 1480 pc, and E(B-V) = 0.10 mag. The cluster age was independently determined for both high-mass (2.1-36 M-.) and low-mass (0.7-1.2 M-.) stars with excellent agreement between the ages derived using post-main-sequence (Girardi et al. 2000) and pre-main-sequence (Baraffe et al. 1998) evolutionary tracks for the high- and low-mass stars, respectively. Analysis of this cluster's color-magnitude diagram reveals a well-defined pre-main sequence (covering DeltaV similar to 9 mag in V and extending from early A stars to near the hydrogen-burning limit), which makes this cluster an ideal laboratory for pre-main-sequence evolution studies MH - Germany MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000172852800018 L2 - Hertzsprung-Russell diagram;open clusters and associations : individual (NGC 2362);stars : formation;stars : fundamental parameters;stars : pre-main-sequence;STARS; PHOTOMETRY; NGC-2362 SO - Astrophysical Journal 2001 ;563(1):L73-L76 3700 UI - 13728 AU - Moitinho A AD - UNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainMoitinho, A, UNAM, Observ Astron Nacl, Apdo Postal 877,CP 22800, Ensenada, Baja California, Mexico TI - Open clusters in the third galactic quadrant I. Photometry AB - We have performed a photometric survey of open clusters in the third Galactic quadrant in order to study the star formation history and spatial structure in the Canis Major-Puppis-Vela region. In this paper we describe a catalogue of CCD UBVRI photometry of approximately 65 000 stars in the fields of 30 open clusters. The data were obtained and reduced using the same telescope, the same reduction procedures, and the same standard photometric system, which makes this catalogue the largest homogeneous source of open cluster photometry so far. In subsequent papers of this series, colour-colour and colour-magnitude diagrams will be presented which, amongst other uses, will allow the determination of an homogeneous set of cluster reddenings, distances, and ages that will constitute the observational basis for our studies of the spatial structure and star formation history in the third Galactic quadrant MH - Mexico|Baja California MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168611400012 L2 - techniques : photometric;stars : fundamental parameters;Galaxy : open clusters and associations : general;Galaxy : structure;ISM : dust extinction;UBV(RI)(C) PHOTOMETRY; CELESTIAL EQUATOR; STANDARD STARS; SPECTROSCOPY; EXTINCTION SO - Astronomy and Astrophysics 2001 ;370(2):436-446 3701 UI - 12313 AU - Mojica J AU - Garcia E AU - Rodriguez FJ AU - Genesca J AD - Inst Mexicano Petr, Mol Simulat Program, Mexico City 07730, DF, MexicoUNAM, Fac Quim, Dept Ingn Met, Mexico City 04510, DF, MexicoGenesca, J, Univ Autonoma Barcelona, Fac Ciencies, E-08193 Barcelona, Spain TI - Evaluation of the protection against corrosion of a thick polyurethane film by electrochemical noise AB - This paper focuses on the study of protection against corrosion by means of a thick polyurethane film. Noise resistance, R,, calculated from a series of potential and current noise measurements, shows that electrochemical noise (EN) technique was able to monitor corrosion under coated metals even when applied at high thicknesses. By using spectral analysis, the nature of the attack on the metallic surface was determined; indeed, the characteristics of the corrosion process were determined even from the beginning of the phenomenon when the surface was exposed in a Salt Fog Chamber. It was possible to determine both how the continuous protection was given by the polyurethane film as a barrier and when the corrosion process was controlled by the appearance of pores on the barrier film. This paper seeks to establish a methodology to study highly resistant coatings. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Materials Science, Coatings & Films U5 - J;Review AV - English IS - 0300-9440 UR - ISI:000172325500012 L2 - electrochemical noise;coatings;corrosion monitoring;polyurethane;AC-IMPEDANCE MEASUREMENTS; ORGANIC COATINGS; COATED STEEL; METALS; SPECTROSCOPY; PERFORMANCE SO - Progress in Organic Coatings 2001 ;42(3-4):218-225 3702 UI - 12318 AU - Molchanov VV AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Casey D AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Ferbel T AU - Filimonov IS AU - Garcia F AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - Hammer C AU - Kangling H AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Li YS AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Morelos A AU - Mukhin VA AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko SV AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Slattery P AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zhu ZH AU - Zielinski M AU - Zukanovich-Funchal R AD - Inst High Energy Phys, Protvino, RussiaBall State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, Istanbul, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Tel Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyMolchanov, VV, Inst High Energy Phys, Protvino, Russia TI - Radiative decay width of the a(2)(1320)(-) meson AB - Coherent pi (+)pi (-)pi (-) production in the interactions of a beam of 600GeV pi (-) mesons with C, Cu and Pb nuclei has been studied with the SELEX facility (Experiment E781 at Fermilab). The a(2)(1320) meson signal has been detected in the Coulomb (low q(2)) region. The Primakoff formalism used to extract radiative decay width of this meson yields Gamma = 284 +/- 25 +/- 25 keV, which is the most precise measurement to date. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172360100007 L2 - radiative decay;Primakoff effect;a(2) (1320);RESONANCE PRODUCTION; NUCLEI; GEV/C; WAVE SO - Physics Letters B 2001 ;521(3-4):171-180 3703 UI - 13953 AU - Molina-Ochoa J AU - Hamm JJ AU - Lezama-Gutierrez R AU - Lopez-Edwards M AU - Gonzalez-Ramirez M AU - Pescador-Rubio A AD - Univ Colima, Fac Ciencias Biol & Agropecuarias, Tecoman 28100, Colima, MexicoUniv Colima, Ctr Univ Invest & Desarrollo Agropecuario, Tecoman 28100, Colima, MexicoARS, Crop Protect & Management Res Unit, USDA, Tifton, GA 31274, USAMolina-Ochoa, J, Univ Colima, Fac Ciencias Biol & Agropecuarias, Apartado Postal 36, Tecoman 28100, Colima, Mexico TI - A survey of fall armyworm (Lepidoptera : Noctuidae) parasitoids in the Mexican states of Michoacan, Colima, Jalisco, and Tamaulipas AB - Fall armyworm larvae, Spodoptera frugiperda (J. E. Smith) were collected from whorl stage corn or sorghum in the states of Michoacan, Colima, and Jalisco in August, and Tamaulipas, Mexico in September 1998. Eleven species of hymenopteran parasitoids were recovered representing 3 families: Ichneumonidae (Ophion flavidus Brulle, Campoletis flavicincta Ashmead, and Pristomerus spinator F.); Braconidae (Aleiodes laphygmae Viereck, Cotesia marginiventris Cresson, Meteorus laphygmae Viereck, Meteorus sp., Chelonus insularis Cresson, Chelonus sp. probably cautus Cresson, and Chelonus sp.); and Eulophidae (Euplectrus platyhypenae Howard). The overall rate of parasitism was 11.3%, based on 2219 larvae collected. The highest rate of parasitism from a single collection was 26.5%, representing 6 species of parasitoids in Michoacan. The next highest rate of parasitism, 23%, was by a single species, C. flavicincta, in Michoacan. The most widely distributed species was P. spinator, occurring in 12 collections from 3 states. Chelonus sp. was collected from all four states in only 6 collections. The greater diversity of parasitoids and higher rates of parasitism in Michoacan may be related to the more diverse habitat with more forests, orchards, and pastures near the cornfields in that state MH - Mexico|Colima MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000168101100004 L2 - parasitoids;Spodoptera frugiperda;Ophion;Campoletis;Pristomerus;Aleiodes;Cotesia;Meteorus;Chelonus;Euplectrus;maize;corn;sorghum;Mexico;SPODOPTERA-FRUGIPERDA SMITH,J.E.; UNITED-STATES; CORN; POPULATIONS; SORGHUM SO - Florida Entomologist 2001 ;84(1):31-36 3704 UI - 11626 AU - Molina C AU - Kaemmer D AU - Aponte S AU - Weising K AU - Kahl G AD - Univ Frankfurt, Bioctr, D-60439 Frankfurt, GermanyCORPOICA, CI Tibaitata, Bogota, ColombiaCtr Invest Cient Yucatan, AC Merida, Yucatan, MexicoUniv Kassel, D-34128 Kassel, GermanyKahl, G, Univ Frankfurt, Bioctr, Marie Curie Str 9, D-60439 Frankfurt, Germany TI - Microsatellite markers for the fungal banana pathogen Mycosphaerella musicola AB - Yellow Sigatoka caused by the ascomycete Mycosphaerella musicola Leach, is one of the most severe banana diseases worldwide, which spread in most banana growing areas, until Black Sigatoka, a more aggressive disease caused by Mycosphaerella fijiensis, appeared. Because of the highly devastating nature of the latter pathogen, recent research almost exclusively focused on M. fijiensis. To close the gap of knowledge and to study the population structure of M. musicola in Yellow Sigatoka-infested areas, we cloned and characterized a versatile set of 26 polymorphic locus-specific microsatellite markers MH - Colombia MH - Germany MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000174289600010 L2 - banana;microsatellites;Mycosphaerella musicola;Yellow Sigatoka;FIJIENSIS SO - Molecular Ecology Notes 2001 ;1(3):137-139 3705 UI - 11964 AU - Mondragon-Ceballos R AD - Inst Mexicano Psiquiatria, Dept Etol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Programa Univ Invest Salud, Unidad Psicobiol & Conducta, Mexico City 04510, DF, MexicoMondragon-Ceballos, R, Deutsches Primatezentrum, Abt Verhaltensforsch & Okol, Kellnerweg 4, D-37077 Gottingen, Germany TI - Interfering in affiliations: sabotaging by stumptailed macaques, Macaca arctoides AB - Stumptailed macaques use a number of acts to interrupt and disrupt affiliative interactions involving other group members. In this paper I describe such interference and raise the hypothesis that it functions to sabotage the formation and/or maintenance of affiliative interactions involving others. My results show that disrupting was due to the saboteur's behaviour, and that the likelihood of receiving some behaviours used to interfere (e.g. aggression, threats, etc.) was significantly higher when animals were involved in an affiliation, than when alone. In addition, the sort of affinitive act was unrelated to the type of interference; the behaviour used to interrupt depended on which of the actors (giver, recipient, or both) was to be driven away; and interrupting an affinitive episode inhibited renewing the session. Yet, to fully account for the function of interference, additional studies are necessary to reveal decisions concerning whom to interrupt, and what are the long-term consequences of interference. (C) 2001 The Association for the Study of Animal Behaviour MH - Germany MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0003-3472 UR - ISI:000173470300018 L2 - BEHAVIOR; MONKEYS; COMPETITION; MULATTA; PERIOD SO - Animal Behaviour 2001 ;62():1179-1187 3706 UI - 14491 AU - Monks S AD - Univ Toronto, Dept Zool, Toronto, ON, CanadaMonks, S, ECOSUR, Zonal Ind 2,Carretera Chetumal Bacalar,Apdo Post, Chetumal 77000, Quintana Roo, Mexico TI - Phylogeny of the Acanthocephala based on morphological characters AB - Only four previous studies of relationships among acanthocephalans have included cladistic analyses, and knowledge of the phylogeny of the group has not kept pace with that of other taxa. The purpose of this study is to provide a more comprehensive analysis of the phylogenetic relationships among members of the phylum Acanthocephala using morphological characters. The most appropriate outgroups are those that share a common early cell-cleavage pattern (polar placement of centrioles), such as the Rotifera, rather than the Priapulida (meridional placement of centrioles) to provide character polarity based on common ancestry rather than a general similarity likely due to convergence of body shapes. The phylogeny of 22 species of the Acanthocephala was evaluated based on 138 binary and multistate characters derived from comparative morphological and ontogenetic studies. Three assumptions of cement gland structure were tested: (i) the plesiomorphic type of cement glands in the Rotifera, as the sister group, is undetermined; (ii) non-syncytial cement glands are plesiomorphic; and (iii) syncytial cement glands are plesiomorphic. The results were used to test an early move of Tegorhynchus pectinarius to Koronacantha and to evaluate the relationship between Tegorhynchus and Illiosentis. Analysis of the data-set for each of these assumptions of cement gland structure produced the same single most parsimonious tree topology. Using Assumptions i and ii for the cement glands, the trees were the same length (length = 404 steps, CI = 0.545, CIX = 0.517, HI = 0.455, HIX = 0.483, RI = 0.670, RC = 0.365). Using Assumption iii, the tree was three steps longer (length = 408 steps, CI = 0.539, CIX = 0.512, HI = 0.461, HIX = 0.488, RI = 0.665, RC = 0.359). The tree indicates that the Palaeacanthocephala and Eoacanthocephala both are monophyletic and are sister taxa. The members of the Archiacanthocephala are basal to the other two clades, but do not themselves form a clade. The results provide strong support for the Palaeacanthocephala and the Eoacanthocephala and the hypothesis that the Eoacanthocephala is the most primitive group is not supported. Little support for the Archiacanthocephala as a monophyletic group was provided by the analysis. Support is provided for the recognition of Tegorhynchus and Illiosentis as distinct taxa, as well as the transfer of T. pectinarius to Koronacantha MH - Canada MH - Mexico|Quintana Roo PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 16 U4 - Parasitology U5 - J;Review AV - English IS - 0165-5752 UR - ISI:000166365700001 L2 - MACROEVOLUTIONARY PATTERNS; GEOMETRIC MORPHOMETRICS; METAZOAN RELATIONSHIPS; PHYLUM-ACANTHOCEPHALA; OUTGROUP ANALYSIS; GIANT NUCLEI; LAKE FISHES; NEOECHINORHYNCHIDAE; ILLIOSENTIDAE; SYSTEMATICS SO - Systematic Parasitology 2001 ;48(2):81-116 3707 UI - 12457 AU - Montanez C AU - Cisneros B AU - Korneluk R AU - Depardon F AD - IPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07360, DF, MexicoChildrens Hosp Eastern Ontario, Solange Gauthier Karsh Mol Genet Lab, Ottawa, ON K1H 8L1, Canada TI - Cell type specific effect of CTG expanded repeats on the expression of a reporter gene MH - Canada MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901109 SO - American Journal of Human Genetics 2001 ;69(4):372-372 3708 UI - 13034 AU - Montero-Moran GM AU - Lara-Gonzalez S AU - varez-Anorve LI AU - Plumbridge JA AU - Calcagno ML AD - Natl Autonomous Univ Mexico, Fac Med, Dept Bioquim, Lab Fisicoquim & Diseno Prot, Mexico City 04510, DF, MexicoCNRS, Inst Biol Physicochim, UPR9073, F-75005 Paris, FranceCalcagno, ML, Natl Autonomous Univ Mexico, Fac Med, Dept Bioquim, Lab Fisicoquim & Diseno Prot, POB 70-159, Mexico City 04510, DF, Mexico TI - On the multiple functional roles of the active site histidine in catalysis and allosteric regulation of Escherichia coli glucosamine 6-phosphate deaminase AB - The active site of glucosamine-6-phosphate deaminase (EC 3.5.99.6, formerly 5.3.1.10) from Escherichia coli was first characterized on the basis of the crystallographic structure of the enzyme bound to the competitive inhibitor 2-amino-2-deoxy-glucitol 6-phosphate. The structure corresponds to the R allosteric state of the enzyme; it shows the side-chain of His 143 in close proximity to the O5 atom of the inhibitor. This arrangement suggests that His 143 could have a role in the catalysis of the ring-opening step of glucosamine 6-phosphate whose a-anomer is the true substrate. The imidazole group of this active-site histidine contacts the carboxy groups from Glu148 and Asp141, via its N delta1 atom [Oliva et al. (1995) Structure 3, 1323-1332]. These interactions change in the T state because the side chain of Glu148 moves toward the allosteric site, leaving at the active site the dyad Asp 141-His143 [Horjales et al. (1999) Structure 7, 527-536]. In this research, a dual approach using site-directed mutagenesis and controlled chemical modification of histidine residues has been used to investigate the role of the active-site histidine. Our results support a multifunctional role of His 143; in the forward reaction, it is involved in the catalysis of the ring-opening step of the substrate, glucosamine 6-P. In the reverse reaction, the substrate fructose 6-P binds in its open chain, carbonylic form. The role of His 143 in the binding of both glucosamine 6-P and reaction intermediates in their extended-chain forms was demonstrated by binding experiments using the reaction intermediate analogue, 2-amino-2-deoxy-D-glucitol 6-phosphate. His 143 was also shown to be a critical residue for the conformational coupling between active and allosteric sites. From the pH dependence of the reactivity of the active site histidine to diethyl dicarbonate, we observed a pK(a) change of 1.2 units to the acid side when the enzyme undergoes the allosteric T to R transition during which the side chain of Glu148 moves toward the active site. The kinetic study of the Glu148-Gln mutant deaminase shows that the loss of the carboxy group and its replacement with the corresponding amide modifies the k(cat) versus pH profile of the enzyme, suggesting that the catalytic step requiring the participation of His 143 has become rate-limiting. This, in turn, indicates that the interaction Glu148-His143 in the wild-type enzyme in the R state contributes to make the enzyme functional over a wide pH range MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0006-2960 UR - ISI:000170627800020 L2 - GLUCOSAMINE-6-PHOSPHATE DEAMINASE; SERINE PROTEASES; SUGAR PHOSPHATES; MECHANISM; ISOMERASE; EVOLUTION; INTERMEDIATE; SPECIFICITY; RESOLUTION; SYNTHASE SO - Biochemistry 2001 ;40(34):10187-10196 3709 UI - 13123 AU - Montesinos M AU - Vergara JD AD - Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAIPN, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 70543, DF, MexicoMontesinos, M, Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA TI - Gauge invariance of complex general relativity AB - In this paper it is implemented how to make compatible the boundary conditions and the gauge fixing condition, for complex general relativity written in terms of Ashtekar variables using the approach of Ref. [1]. Moreover, it is found that at first order in the gauge parameters, the Hamiltonian action is (on shell) fully gauge-invariant under the gauge symmetry generated by the first class constraints in the case when spacetime M has the topology M = R x Sigma and Sigma has no boundary. Thus, the statement that the constraints linear in the momenta do riot contribute to the boundary terms is right, but only in the case when Sigma has no boundary MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Letter AV - English IS - 0001-7701 UR - ISI:000170261700016 L2 - Ashtekar variables;boundary conditions;gauge fixing conditions;CANONICAL GRAVITY; VARIABLES; FIELD SO - General Relativity and Gravitation 2001 ;33(5):921-929 3710 UI - 14292 AU - Montesinos M AU - Rovelli C AD - IPN, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USACNRS, Ctr Theoret Phys, F-13288 Marseille, FranceMontesinos, M, IPN, Dept Fis, Ctr Invest & Estudios Avanzados, Av IPN 2508, Mexico City 07000, DF, Mexico TI - Statistical mechanics of generally covariant quantum theories: a Boltzmann-like approach AB - We study the possibility of applying statistical mechanics to generally covariant quantum theories with a vanishing Hamiltonian, We show that (under certain appropriate conditions) this makes sense, in spite of the absence of a notion of energy and external time. We consider a composite system formed by a large number of identical components, and apply Boltzmann's ideas and the fundamental postulates of ordinary statistical physics. The thermodynamical parameters an determined by the properties of the thermalizing interaction. We apply these ideas to a simple example, in which the component system has one physical degree of freedom and mimics the constraint algebra of general relativity MH - France MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000167091000017 L2 - INTERACTING RELATIVISTIC PARTICLES; TIME; GRAVITY; HYPOTHESIS; SYSTEMS; STATE SO - Classical and Quantum Gravity 2001 ;18(3):555-569 3711 UI - 14136 AU - Montesinos T AU - Perez-Munguia S AU - Valdez F AU - Marty JL AD - Univ Perpignan, Ctr Phytopharm, URA 461, F-66860 Perpignan, FranceNatl Autonomous Univ Mexico, Fac Chem, Dept Food Sci & Biotechnol, Mexico City 04510, DF, MexicoInst Technol Ika Laguna Bld Revoluc & Calzada Cua, Mexico City, DF, MexicoMarty, JL, Univ Perpignan, Ctr Phytopharm, URA 461, 52 Ave le Villeneuve, F-66860 Perpignan, France TI - Disposable cholinesterase biosensor for the detection of pesticides in water-miscible organic solvents AB - A disposable cholinesterase biosensor based on screen-printed electrodes was assembled and used to assess the effect of miscible organic solvents on the acetylcholinesterase activity and on the inhibitory effect of organophosphorus pesticides on acetylcholinesterase activity. Acetonitrile, ethanol and DMSO were tested in a range 0-30% mixed with phosphate buffer (0.1 M, pH 7). With 5% acetonitrile and 10% ethanol, an increase of the recorded current was observed. The addition of 0.2% polyethylenimine to the enzyme preparation, before immobilisation, allowed the utilisation of 15% acetonitrile without negative effect on the enzyme activity. An inhibition calibration curve was obtained using chlorpyrifos-ethyl-oxon, a compound widely used for agricultural purposes. The lowest detectable amount was 1 ppb following an incubation time of 10 min. The use of 5% acetonitrile and 0.2% polyethylenimine did not interfere with the enzyme-inhibitor interactions. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 33 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2670 UR - ISI:000167594400007 L2 - biosensors;organic solvents;pesticides;anticholinesterase pesticides;ACETYLCHOLINESTERASE SO - Analytica Chimica Acta 2001 ;431(2):231-237 3712 UI - 12695 AU - Montiel MDT AU - Tyagi RD AU - Valero JR AD - Univ Quebec, INRS Eau, Inst Natl Rech Sci, St Foy, PQ G1V 4C7, CanadaMexican Inst Water Technol, Jiutepec, Morelos, MexicoNat Resources Canada, Canadian Forest Serv, Laurentian Forestry Ctr, St Foy, PQ G1V 4C7, CanadaTyagi, RD, Univ Quebec, INRS Eau, Inst Natl Rech Sci, 2700 Rue Einstein, St Foy, PQ G1V 4C7, Canada TI - Wastewater treatment sludge as a raw material for the production of Bacillus thuringiensis based biopesticides AB - Seven wastewater sludges of different origins and types were used as an alternate culture medium for producing Bacillus thuringiensis variety kurstaki HD-1. The sludge samples were used under three different preparations: without pre-treatment, with acid treatment (hydrolysed sludge) and the supernatant obtained after centrifugation of the hydrolysed sludge. The sludge composition varied widely with origin and the type of sludge. Growth and sporulation were evaluated by the total viable cell count and spore count of the preparations. Growth, sporulation and endotoxin production were affected by the sludge origin. Hydrolysed sludge gave the highest viable cell and spore counts while the liquid phase (supernatant) gave the lowest. Non-hydrolysed primary sludge from Valcartier was unable to sustain bacterial growth because of its low pH. Bioassays were conducted against larvae of spruce budworm to evaluate entomotoxic potential of the preparations obtained. In general, sludge hydrolysis increased the entomotoxicity yields. Similar entomotoxicity was observed in Black Lake secondary sludge (4100 IU/muL) as that obtained in the reference soya medium (3800 IU/muL). The use of the sludge supernatant (liquid phase) was not recommended due to the low entomotoxic potential obtained. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000171413600007 L2 - sewage sludge;wastewater sludge;sludge disposal;sludge treatment;sludge recycling;biopesticide;Bacillus thuringiensis;spruce budworm;entomotoxicity;Choristoneura fumiferana;SUBSP ISRAELENSIS; DELTA-ENDOTOXIN; MEDIA; H-14 SO - Water Research 2001 ;35(16):3807-3816 3713 UI - 12041 AU - Moo-Valle H AU - Quezada-Euan JJG AU - Wenseleers T AD - Univ Autonoma Yucatan, Dept Apicultura, Fac Med Vet, Merida 97100, Yucatan, MexicoKatholieke Univ Leuven, Inst Zool, B-3000 Louvain, BelgiumQuezada-Euan, JJG, Univ Autonoma Yucatan, Dept Apicultura, Fac Med Vet, Apdo Postal 4-116, Merida 97100, Yucatan, Mexico TI - The effect of food reserves on the production of sexual offspring in the stingless bee Melipona beecheii (Apidae, Meliponini) AB - A long-term study on the production of sexual offspring in relation to food stores was conducted in the stingless bee Melipona beecheii. Firstly, the production of sexuals was followed during one year in 10 colonies kept under natural conditions. Of the brood produced, 22.9% were males, and of all female brood, 14.6% were queens. Secondly, we measured the effect of experimentally manipulating the amount of food stores. One set of colonies started with 1.5 kg of food reserves and were regularly fed with pollen and nectar while another set were subjected to reduced food reserves of 0.5 kg, and were not given any extra food. Throughout the study, colonies with no treatment had brood and adults of both sexes all year round with no evidence of their presence being linked to swarming. Colonies with reduced food stores produced fewer males (0.7%) and queens (10.5%) than untreated colonies or colonies with enlarged food stores. The production of sexuals in colonies with enlarged food stores (23.4% males, 13.5% queens) did not differ significantly from that under natural conditions. We conclude that in Melipona only colonies that have accumulated large food stores produce sexuals that contribute to the reproductive population. This may lead to marked differences in the amount of sexuals produced by different colonies, although at the population level sexuals may be present all year round MH - Belgium MH - Mexico|Yucatan PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 22 U4 - Entomology U5 - J;Article AV - English IS - 0020-1812 UR - ISI:000173170300018 L2 - food stores;Melipona;drones;gynes;seasonal reproduction;stingless bees;WORKERS; BEHAVIOR SO - Insectes Sociaux 2001 ;48(4):398-403 3714 UI - 12530 AU - Moore SE AU - Urban J AU - Perryman WL AU - Gulland F AU - Perez-Cortes H AU - Wade PR AU - Rojas-Bracho L AU - Rowles T AD - NOAA, Natl Marine Fisheries Serv, AFSC, Natl Marine Mammal Lab, Seattle, WA 98115, USAUniv Autonoma Baja California, Dept Biol Marina, La Paz 23081, Baja California, MexicoNOAA, SWFSC, NMFS, La Jolla, CA 92038, USAMarine Mammal Ctr, Sausalito, CA 94965, USACRIP, Inst Nacl Pesca, La Paz 23020, Baja California, MexicoCICESE, Programa Nacl Invest & Conservac Mamiferos Marino, Ensenada 22860, Baja California, MexicoNOAA, NMFS, Silver Spring, MD 20910, USAMoore, SE, NOAA, Natl Marine Fisheries Serv, AFSC, Natl Marine Mammal Lab, 7600 Sand Point Way NE, Seattle, WA 98115 USA TI - Are gray whales hitting "K" hard? MH - Mexico|Baja California MH - USA PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 10 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000171809200019 SO - Marine Mammal Science 2001 ;17(4):954-958 3715 UI - 12718 AU - Mora-Diez N AU - varez-Idaboy JR AU - Boyd RJ AD - Dalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, CanadaInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv La Habana, Fac Quim, Lab Quim Computac & Teor, Bangkok 10400, ThailandBoyd, RJ, Dalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, Canada TI - A quantum chemical and TST study of the OH hydrogen-abstraction reaction from substituted aldehydes: FCHO and ClCHO AB - In the present study, ab initio methods have been used to study the OH hydrogen-abstraction reaction from two substituted aldehydes: FCHO and ClCHO. A complex mechanism in which the overall rate depends on the rates of two competitive reactions, a reversible step where a reactant (or prereactive) complex is formed, followed by the irreversible hydrogen abstraction to form the products, is corroborated. This mechanism was previously shown to describe accurately the kinetics of the OH hydrogen-abstraction reaction from formaldehyde, and acetaldehyde. Classical transition state theory (TST) rate constants calculated with tunneling corrections, assuming an unsymmetrical Eckart barrier, agree very well with experimental upper bound values. Activation energy barriers and enthalpies of reaction hav e been estimated through CCSD(T) single point calculations using MP2 geometries and frequencies and the 6-311++G(d,p) basis set MH - Canada MH - Mexico|Distrito Federal MH - Thailand PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000171401200027 L2 - ATOM-INITIATED OXIDATION; TRANSITION-STATE THEORY; ATMOSPHERIC CHEMISTRY; CL; RADICALS; FTIR SO - Journal of Physical Chemistry A 2001 ;105(39):9034-9039 3716 UI - 12919 AU - Mora-Diez N AU - varez-Idaboy JR AU - Vivier-Bunge A AU - Boyd RJ AD - Dalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, CanadaInst Mexicano Petr, Mexico City, DF, MexicoUniv Autonoma Metropolitana, Dept Quim, Mexico City, DF, Mexico TI - Theoretical calculations in atmospheric chemistry: OH and NO3 hydrogen-abstraction reactions from aldehydes MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690002102 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U414-U414 3717 UI - 13674 AU - Mora O AU - Romano JL AU - Gonzalez E AU - Ruiz FJ AU - Gomez R AU - Shimada A AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Lab Rumiol & Metab Nutricional, Ajuchitlan, Qro, MexicoInst Nacl Invest Forestales Agr & Pecuarias, Ctr Nacl Invest Fisiol & Mejoramiento Anim, Ajuchitlan, Qro, MexicoUniv Autonoma Queretaro, Fac Quim, Ajuchitlan, Qro, MexicoCtr Invest Pecuarias Estado Sonora, Hermosillo, Sonora, MexicoShimada, A, 1605-B Pacific Rim Ct,PMB 23-141, San Diego, CA 92154, USA TI - Presence of fed beta-carotene in digesta, excreta, blood, and hepatic and adipose tissues of Holstein steers AB - Eight animals were fed a diet without added beta -carotene for 49 d and then supplemented with four levels of beta -carotene (0, 5.5, 44 or 352 mg kg(-1) dry matter) for 30 d; the two-phase procedure was then repeated. Steers were killed at the end of the second period. Concentrations of beta -carotene were: 0, 0, 227.2 and 2011 mug dL(-1) (P < 0.05) in ruminal fluid; 0, 0, 533.7 and 4418 mug dL(-1) (P < 0.05) in duodenal fluid; 0, 4.03, 14.91 and 90.64 mug g(-1) (P < 0.05) in dry faeces; 0.8, 1.2, 4.7 and 8.1 mug g(-1) (P < 0.05) in liver; 0.07, 0.15, 0.5 and 3.7 mug g(-1) (P < 0.05) in subcutaneous fat; 0, 0, 0.09 and 0.23 g g(-1) (P < 0.05) in kidney fat for dietary treatments with 0, 5.5, 44 and 352 mg beta -carotene kg(-1) DM, respectively. The dose of beta -carotene was reflected in retinol concentrations in liver: 101.1, 113.6, 161.7 and 199.6 mug g(-1) (P < 0.05), but not in subcutaneous or kidney fat (P > 0.1). The estimated p-carotene digestibilities were 66.25, 84.39 and 88.14% for treatments with 5.5, 44 and 352 mg p-carotene kg(-1) DM, respectively (P < 0.01). The results suggest a high capacity of bovine tissues to store beta -carotene and probably a limited capability to convert beta -carotene into vitamin A MH - Mexico|Queretaro MH - Mexico|Sonora MH - USA PB - OTTAWA: AGRICULTURAL INST CANADA RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0008-3984 UR - ISI:000168808800017 L2 - beta-carotene digestion;blood concentration;deposition;steers;FAT COLOR; VITAMIN-A; CATTLE; PLASMA; KINETICS; PASSAGE; BOVINE; MODELS; LIVER; GOATS SO - Canadian Journal of Animal Science 2001 ;81(1):133-139 3718 UI - 12647 AU - Morales-Acevedo A AU - Santana G AU - Carrillo-Lopez J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Elect Engn, Mexico City 07360, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana 43100, CubaUniv Autonoma Puebla, Inst Ciencias, CIDS, Puebla 72570, MexicoMorales-Acevedo, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Elect Engn, Mexico City 07360, DF, Mexico TI - Thermal oxidation of silicon in nitrous oxide at high pressures AB - Thermal oxidation of silicon in nitrous oxide (N2O) ambient at pressures from 1 to 4 atm has been studied. We show that the oxidation rate is different from the one predicted by the Deal-Grove model for normal oxidation in dry oxygen. In our case, the dependence observed for the oxide thickness as a function of the oxidation time is of the form x = x(0) + (gammat)(beta), where x(0) is a native oxide thickness. For the temperature range between 900 and 1200 degreesC, and 2 atm of pressure, the activation energy for gamma is around 1.18 eV. In addition, the exponential factor beta (at 1000 degreesC) varies as the square root of the N2O pressure. These results indicate that thermal oxidation in N2O behaves in a completely different way than normal oxidation, very likely due to the influence of chemical reactions in the gas phase, to the catalytic influence of the N2O-SiO2 interface, and to the incorporation of nitrogen into the oxide film itself. The results presented here establish the basis for the development of a more complete model for thermal oxidation of silicon in a N2O ambient. (C) 2001 The Electrochemical Society MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 3 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000171501600050 L2 - N2O; FURNACE; DIELECTRICS; KINETICS; GROWTH; FILMS SO - Journal of the Electrochemical Society 2001 ;148(10):F200-F202 3719 UI - 13335 AU - Morales-Manzanares R AU - Morales EF AU - Dannenberg R AU - Berger J AD - Univ Guanajuato, Lab Informat Musical, Guanajuato, MexicoITESM, Temixco 62589, Morelos, MexicoCarnegie Mellon Univ, Sch Comp Sci, Pittsburgh, PA 15213, USAStanford Univ, Ctr Comp Res Music & Acoust, Stanford, CA 94305, USA TI - SICIB: An interactive music composition system using body movements MH - Mexico|Guanajuato MH - Mexico|Morelos MH - USA PB - CAMBRIDGE: M I T PRESS RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Interdisciplinary Applications;Music U5 - J;Article AV - English IS - 0148-9267 UR - ISI:000169754300003 L2 - DANCE SO - Computer Music Journal 2001 ;25(2):25-36 3720 UI - 12502 AU - Morales-Montor J AU - Baig S AU - Mitchell R AU - Deway K AU - Hallal-Calleros C AU - Damian RT AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoUniv Georgia, Dept Cellular Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30606, USAMorales-Montor, J, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, AP 70228, Mexico City 04510, DF, Mexico TI - Immunoendocrine interactions during chronic cysticercosis determine male mouse feminization: Role of IL-6 AB - Taenia crassiceps cysticercosis results in an Impressive feminization in male mice during chronic infection, characterized by increased serum estradiol levels 100 times their normal values, while those of testosterone and dihydrotestosterone are decreased by 85 and 95 % respectively. Concomitantly, the levels of follicle-stimulating hormone and IL-6 are increased 70 and 90 times their normal values in the infected male mice. Since a specific Th1/Th2 shift of the immune response has been previously reported during the chronic infection, and this shift may be associated with the feminization process, we proposed that this shift is induced by immunoendocrine interactions during the disease, and this gives way to a change in the initial resistance to the infection in the male mice, which become as susceptible as female mice. To confirm this hypothesis, we depleted immune system activity in two different ways: total body irradiation and neonatal thymectomy. Our results show that when immune system activity is depleted using either strategy, the male mice do not feminize, and the levels of follicle-stimulating hormone and IL-6 are inhibited. Depletion of IL-6 using IL-6(-/-) knockout mice does not produce the feminization process stated above, while restitution of the IL-6(-/-) knockout, irradiated, and thymectomized mice with murine recombinant IL-6 restores the feminization process. Expression of the IL-6 gene was found only in the testes and spleen of infected animals. Our results illustrate the importance of immunoendocrine interactions during a parasitic disease and show a possible new mechanism of parasite establishment in an initially resistant host MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 26 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000171858300049 L2 - TAENIA-CRASSICEPS CYSTICERCOSIS; REPRODUCTIVE-SYSTEM; IMMUNE-RESPONSE; CELLS-INVITRO; LEYDIG-CELLS; MALE-MICE; INTERLEUKIN-6; ANTIGENS; SUSCEPTIBILITY; IMMUNIZATION SO - Journal of Immunology 2001 ;167(8):4527-4533 3721 UI - 12539 AU - Morales-Montor J AU - Mohamed F AU - Ghaleb AM AU - Baig S AU - Hallal-Calleros C AU - Damian RT AD - Univ Georgia, Dept Cellular Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30602, USAMorales-Montor, J, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, AP 70228, Mexico City 04510, DF, Mexico TI - In vitro effects of hypothalamic-pituitary-adrenal axis (HPA) hormones on Schistosoma mansoni AB - The effects of in vitro treatment of cercariae, schistosomula, and adult worms of Schistosoma mansoni with 4 hypothalamic-pituitary-adrenal (HPA) axis hormones are described. Dehydroepiandrosterone (DHEA) had the strongest effect on viability. Cercariae were more susceptible to this hormone than schistosomula and adults. Mechanically transformed schistosomula showed 100% mortality (determined microscopically by progressive internal disorganization, development of lucent areas in the cytoplasm, and progressive loss of motility) after 48 hr, whereas physiologically induced schistosomula were more resistant, maintaining viability for up to 5 days of exposure. Males were considerably less sensitive than females to the lethal action of DHEA. When adult worms were paired, DHEA lethality was markedly reduced, with viability beginning to decrease only after 4 days in culture. Cortisol reduced the viability of each of the stages tested about equally. Corticotropin-releasing hormone (CRH) and adrenocorticotropin (ACTH) did not affect the viability of any stage. DHEA and cortisol significantly inhibited in vitro oviposition, whereas CRH and ACTH did not. DHEA and cortisol exerted their effects on schistosome viability and oviposition in a concentration-dependent manner. These results suggest possible new avenues for the control of schistosomiasis MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 9 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000171782300034 L2 - SUSCEPTIBILITY DIFFERENCES; FEMALE MICE; INFECTION; TESTOSTERONE; STEROIDS; SYSTEM SO - Journal of Parasitology 2001 ;87(5):1132-1139 3722 UI - 12787 AU - Morales-Morales D AU - Redon R AU - Cramer RE AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Hawaii, Dept Chem, Honolulu, HI 96822, USAMorales-Morales, D, Natl Autonomous Univ Mexico, Inst Quim, Cd Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - Synthesis and structural characterisation of [RuCl(NO)(eta(2)-O-2)(PPh3)(2)] AB - The extremely reactive and air-sensitive nitrosyl-ruthenium(0) species trans-[RuCl(NO)(PPh3)(2)] (2) oxidatively adds HCl to give the octahedral ruthenium(II) complex [RuHCl2(NO)(PPh3)(2)] (3). On treatment of 2 with O-2, the five-coordinate 1:1 adduct [RuCl(NO)(eta (2)-O-2)(PPh3)(2)] (4) is formed. The dioxygen complex has been characterised by X-ray structural analysis. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000171209800024 L2 - ruthenium complexes;nitrosyl complexes;oxidative addition reactions;dioxygen ruthenium complexes;crystal structures;NMR spectroscopy;MOLECULAR-STRUCTURE; NITROSYL COMPLEXES SO - Inorganica Chimica Acta 2001 ;321(1-2):181-184 3723 UI - 14064 AU - Morales-Morales D AU - Zheng YF AU - Dilworth JR AU - Redon R AU - Torrens H AD - Univ Oxford, Inorgan Chem Lab, Oxford OX1 3QR, EnglandNatl Autonomous Univ Mexico, Fac Quim, DEPg, Mexico City 04510, DF, MexicoDilworth, JR, Univ Oxford, Inorgan Chem Lab, S Parks Rd, Oxford OX1 3QR, England TI - Synthesis of neutral rhenium(V) complexes with fluorinated benzenethiols: the crystal and molecular structure of [ReO(C6H4S-2-F)(3)(PPh3)] AB - The complexes [ReO(SRf)(3)(PPh3)] and [ReN(SRf)(2)(PPh3)(2)] [R-f = C6F5 (1) and (6), C6F4-4-H (2) and (7), C6H4-2-F (3) and (8), C6H4-3-F (4) and (9) and C6H4-4-F (5) and (10)1 were synthesized in good yields by reacting [ReOCl3(PPh3)(2)] or [ReNCl2(PPh3)(2)] and the lead salt of the corresponding fluorobenzenethiol [Pb(SRf)(2)]. In contrast, when the free thiol HSC6F5 was employed in the presence of NEt3 as base, the ionic species [ReO(SC6F5)(4)][NEt3. HCl] (11) was isolated. The X-ray crystal structure of 3 was determined. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000167746200005 L2 - rhenium complexes;fluorinated thiols;oxo complexes;thiolate complexes;nitrido complexes;DINUCLEAR RHODIUM COMPLEXES; HINDERED THIOLATE LIGANDS; HYDROFORMYLATION SO - Inorganica Chimica Acta 2001 ;314(1-2):37-41 3724 UI - 12479 AU - Morales-Sanchez E AU - Gonzalez-Hernandez J AU - Ramirez-Bon R AU - Espinoza-Beltran F AU - Vorobiev Y AU - Morales-Acevedo A AU - Gorley P AU - Kovalyuk Z AU - Horley P AD - IPN, CINVESTAV, Unidad Queretaro, Juriquilla 76230, QRO, MexicoIPN, CINVESTAV, Dept Ingn Elect, Mexico City 07738, DF, MexicoChernovtsy State Univ, UA-274012 Chernovtsy, UkraineMorales-Sanchez, E, IPN, CINVESTAV, Unidad Queretaro, Libramiento Norponiente 2000, Juriquilla 76230, QRO, Mexico TI - CdTe and Si solar cell performance comparison in a new system for solar energy conversion and storage AB - A new system for the effective conversion and storage of solar energy using CdTe and Si based photovoltaic solar cells and the Li-Bi2Se3 rechargable batteries was created and studied. PV Solar Cells with the different types of structure and barrier were studied (Shottky, NUS with thin insulating layer, and p-n junction), employing low-temperature and high-temperature technological cycles. The influence of the technological details upon the electrical parameters as well as the efficiency and stability of their performance were analyzed, and also the condition for improving the efficiency were found. In particular, it was established that Zn-doping of CdTe and the Al alloying to Si at 800 degreesC have a profound effect upon the PV cell characteristics. The influence of the recombination in different parts of the cell upon the cell's efficiency and the recombination dependence upon the technological features were investigated. A comparison of the performance and fabrication cost of the new systems for solar energy conversion and storage with others using conventional cells and batteries is made. It is shown that newly developed systems could provide a global efficiency close to that for traditional ones, with simpler and cheaper technology. With some modifications of the technology, we expect to get even higher efficiencies and a wider system operation temperature range. The possibilities are discussed for the creation of a hybrid energy conversion system on the basis of our cells and batteries, with an overall efficiency of transformation of solar-to-electric energy around 40% MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Ukraine PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900007 SO - Modern Physics Letters B 2001 ;15(17-19):597-600 3725 UI - 14205 AU - Morales H AU - Perfecto I AU - Ferguson B AD - El Colegio Frontera Sur Carretera Panamer Perifer, Dept Agroecol, San Cristobal Las Casas, Chiapas, MexicoUniv Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109, USAUniv Michigan, Dept Biol, Ann Arbor, MI 48109, USAMorales, H, El Colegio Frontera Sur Carretera Panamer Perifer, Dept Agroecol, Apartado Postal 63,CP 29290, San Cristobal Las Casas, Chiapas, Mexico TI - Traditional fertilization and its effect on corn insect populations in the Guatemalan highlands AB - Cakchiquel farmers in Patzun, Guatemala stated that pest populations have increased in corn crops since they abandoned organic fertilization and adopted synthetic fertilizers. Given the dearth of scientific information about the effects of fertilization practices on pests, a controlled experiment was performed to elucidate these interactions. Pests, their natural enemies, and nutritional status were compared among corn plots with synthetic and organic fertilizers, and a control without fertilizer. Corn in fields treated with organic fertilizer applied for at least 2 years hosted fewer aphids (Rhopalosiphum maidis) than corn treated with synthetic fertilizer. This difference seems attributable to high concentration and total content of foliar nitrogen in corn in the synthetic fertilizer plots, although numbers of Spodoptera frugiperda showed a weak negative correlation with increased nitrogen levels. Coccinellidae populations were higher in plots with high aphid populations, but only where organic fertilizer was applied. There were no significant yield differences among treatments. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Chiapas MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000167270400004 L2 - pest management;fertilizers;compost;corn;insect-plant interactions;traditional knowledge;Guatemala;LIVING MULCHES; MANAGEMENT; NITROGEN; GROWTH; MANURE; CROP SO - Agriculture Ecosystems & Environment 2001 ;84(2):145-155 3726 UI - 13044 AU - Morales JL AU - Nocedal J AD - Inst Tecnol Autonomo Mexico, Mexico City 01000, DF, MexicoNorthwestern Univ, ECE Dept, Evanston, IL 60208, USAMorales, JL, Inst Tecnol Autonomo Mexico, Rio Hondo 1,Col Tizapan San Angel, Mexico City 01000, DF, Mexico TI - Algorithm 809: PREQN: Fortran 77 subroutines for preconditioning the conjugate gradient method AB - PREQN is a package of Fortran 77 subroutines for automatically generating preconditioners for the conjugate gradient method. It is designed for solving a sequence of linear systems A(i)x = bi, i = 1, ..., t, where the coefficient matrices Ai are symmetric and positive definite and vary slowly. Problems of this type arise, for example, in nonlinear optimization. The preconditioners are based on limited-memory quasi-Newton updating and are recommended for problems in which (i) the coefficient matrices are not explicitly known and only matrix-vector products of the form Aiv can be computed; or (ii) the coefficient matrices are not sparse. PREQN is written so that a single call from a conjugate gradient routine performs the preconditioning operation and stores information needed for the generation of a new preconditioner MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ASSOC COMPUTING MACHINERY RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0098-3500 UR - ISI:000170558600005 L2 - algorithms;preconditioning;conjugate gradient method;quasi-Newtonmethod;Hessian-free Newton method;limited-memory method;NEWTON SO - Acm Transactions on Mathematical Software 2001 ;27(1):83-91 3727 UI - 12936 AU - Morales OG AU - Ramirez JA AU - Vivanco DI AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, Inst Ecol & Alimentos, Cd Victoria 87040, Tamaulipas, MexicoUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Campus Lugo, Lugo 27002, Spain TI - Surimi of fish species from the Gulf of Mexico: evaluation of the setting phenomenon AB - Atlantic croaker (Micropogon undulatus), Mexican flounder (Cyclopsetta chittendeni) and Northern kingfish (Menticirrhus saxatilis) are warm water species abundant in the Gulf of Mexico, usually obtained as shrimp by-catch. Gels from these species were obtained by several treatments: (1) setting at 25 degreesC/3 h followed by cooking at 90 degreesC/15 min; (2) setting at 40 degreesC/30 min and 90 degreesC/15 min; (3) 90 degreesC/15 min (control). Three different additives were studied: 0.66% ammonium chloride, 0.2% EDTA and 0.2% calcium chloride. The setting phenomenon was induced at 40 degreesC in the three species. 0.2% calcium chloride improved shear stress and shear strain in surimi gels from Atlantic croaker and Northern kingfish. 87.98 and 98.49 kPa for shear stress, and 2.23 and 2.15 for shear strain were achieved, respectively. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000170885600004 L2 - COVALENT CROSS-LINKING; ALASKA POLLOCK; TRANSGLUTAMINASE; GELATION; GELS SO - Food Chemistry 2001 ;75(1):43-48 3728 UI - 13942 AU - Morales RD AU - Lopez-Ramirez S AU - Palafox-Ramos J AU - Zacharias D AD - Inst Politecn Nacl, Dept Met, ESIQIE, Mexico City 07300, DF, MexicoFoseco Inc, USA, Cleveland, OH USAMorales, RD, Inst Politecn Nacl, Dept Met, ESIQIE, Apdo Postal 75-874, Mexico City 07300, DF, Mexico TI - Mathematical simulation of effects of flow control devices and buoyancy forces on molten steel flow and evolution of output temperatures in tundish AB - The effects of flow control devices and buoyancy forces on the melt flow in a large tundish have been mathematically simulated using a k-epsilon turbulence model. Flow control devices included arrangements consisting of a pair of weirs and a pair of dams, a turbulence inhibitor and a pair of dams, and only a turbulence inhibitor. Buoyancy forces were simulated using step inputs of temperature and inputs of varying ladle stream temperature into the tundish. It was found that with inputs of hot steel, flow control devices improve performance by driving the melt upwards through the action of buoyancy forces. A bare tundish is less sensitive to buoyancy forces and shows greater thermal mixing than any other arrangement. Inputs of temperature steps promote higher temperature gradients of liquid steel inside the vessel than inputs of varying ladle stream temperatures. A turbulence inhibitor delays the thermal disturbance compared with a bare tundish or a tundish with a weir-dam arrangement. When using a turbulence inhibitor higher volume fractions of melt obey a pluglike flow. The dimensionless quantity Gr/Re-2, where Grand Re are the Grashof and Reynolds number respectively, quantifies buoyancy forces: high values indicate that buoyancy forces have more effect than inertial forces on fluid flow. When Gr/Re-2 < 5, buoyancy forces have no noticeable influence on fluid flow MH - Mexico|Distrito Federal MH - USA PB - LONDON: I O M COMMUNICATIONS LTD INST MATERIALS RP - NOT IN FILE U3 - TC 9 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0301-9233 UR - ISI:000168104900004 L2 - HEAT-TRANSFER PHENOMENA; CONTINUOUS-CASTING TUNDISHES; INCLUSION BEHAVIOR; LIQUID STEEL; FLUID-FLOW; OPERATIONS; TRANSPORT; PLASMA; DESIGN SO - Ironmaking & Steelmaking 2001 ;28(1):33-43 3729 UI - 12676 AU - Moran C AU - Azziz R AD - Mexican Inst Social Secur, Hlth Res Council, Mexico City, DF, MexicoUniv Alabama, Dept Obstet & Gynecol, Birmingham, AL 35294, USAUniv Alabama, Dept Med, Birmingham, AL 35294, USAMoran, C, Mexican Inst Social Secur, Hlth Res Council, Mexico City, DF, Mexico TI - Why can't a man be more like a mouse? Reply MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Letter AV - English IS - 0015-0282 UR - ISI:000171511600047 SO - Fertility and Sterility 2001 ;76(4):856-856 3730 UI - 14084 AU - Moran C AU - Azziz R AD - Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, Birmingham, AL 35233, USAUniv Alabama, Dept Med, Div Endocrinol, Birmingham, AL 35233, USAMexican Inst Social Secur, Coordinat Med Invest, Mexico City, DF, MexicoAzziz, R, Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, 618 S 20th St,549 OHB, Birmingham, AL 35233 USA TI - The role of the adrenal cortex in polycystic ovary syndrome AB - Approximately 25% of patients with polycystic ovary syndrome (PCOS) suffer from adrenal androgen (AA) excess, generally in the form of elevated circulating DHEAS levels. The levels of AA seem to be genetically determined, and AA excess may then represent an inherited trait that increases the risk of developing PCOS. The majority of these patients appear to have a generalized increase in AA hyper-responsiveness to ACTH, without differences in the sensitivity to CRH and ACTH. Whereas ovarian hormones can stimulate AA secretion, this accounts for only a fraction of the abnormality. Overall, the causes and significance of AA excess in PCOS remain to be elucidated MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 13 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0889-8545 UR - ISI:000167628600005 L2 - DEHYDROEPIANDROSTERONE-SULFATE LEVELS; 3-BETA-HYDROXYSTEROID DEHYDROGENASE-DEFICIENCY; GROWTH FACTOR-I; HYPERANDROGENIC WOMEN; ANDROGEN EXCESS; INSULIN-RESISTANCE; HIRSUTE WOMEN; 11-BETA-HYDROXYLASE DEFICIENCY; 21-HYDROXYLASE DEFICIENCY; SERINE PHOSPHORYLATION SO - Obstetrics and Gynecology Clinics of North America 2001 ;28(1):63-+ 3731 UI - 14109 AU - Moran C AU - Huerta R AU - Conway-Myers BA AU - Hines GA AU - Azziz R AD - Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, Birmingham, AL 35249, USAMexican Inst Social Secur, Mexico City, DF, MexicoUniv Guanajuato, Leon, MexicoUniv Alabama, Dept Med, Birmingham, AL 35294, USAAzziz, R, Univ Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, 618 S 20th St,549 OHB, Birmingham, AL 35249 USA TI - Altered autophosphorylation of the insulin receptor in the ovary of a woman with polycystic ovary syndrome AB - Objective: To determine whether the tyrosine autophosphorylation of the insulin receptor (IR) in the ovary of a woman with polycystic ovary syndrome (PCOS) was reduced compared to normal. Design: Experimental study. Setting: Tertiary care medical center. Patient(s): One woman with PCOS and one healthy control, both of whom underwent a hysterectomy and bilateral s salpingo-oophorectomy. Intervention(s): Plasma membrane fraction of ovarian tissue was isolated, and the IR was purified and concentrated. Main Outcome Measure(s): Western blots of the IR, which had been incubated with and without insulin, were prepared. Colorimetric and chemiluminescent methods were used to detect the presence of the IR beta -subunit and IR tyrosine autophosphorylation, respectively. Result(s): The presence of the beta -subunit of the LR was identified in both ovarian samples. The degree of insulin-stimulated IR tyrosine autophosphorylation, reflected by the mean (+/-SD) relative optical density of the 95 kd band, was 4.3-fold higher in the normal ovary compared to the PCOS ovary (0.56 +/- 0.18 optical density vs. 0.13 +/- 0.10 optical density, respectively). Conclusion(s): Tyrosine autophosphorylation of the IR may be decreased in the ovaries of women with PCOS, similar to the findings in other tissues. The mechanisms through which insulin acts to produce an excess in ovarian androgen production in the face of a decrease in ovarian LR autophosphorylation remain to be determined. (C) 2001 by American Society for Reproductive Medicine MH - USA MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000167530900032 L2 - insulin receptor;autophosphorylation;polycystic ovary syndrome;SERINE PHOSPHORYLATION; RESISTANCE; FIBROBLASTS SO - Fertility and Sterility 2001 ;75(3):625-628 3732 UI - 12132 AU - Moravec F AU - Salgado-Maldonado G AU - Cabanas-Carranza G AD - Acad Sci Czech Republ, Inst Parasitol, Ceske Budejovice 37005, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, Ceske Budejovice 37005, Czech Republic TI - New observations on Vasorhabdochona cablei (Nematoda : Rhabdochonidae) with remarks to the family Rhabdochonidae AB - The rhabdochonid nematode Vasorhadbochona cablei Martin et Zam, 1967 is redescribed from specimens found in the liver and mesenteries of the fish Gobiomorus maculatus (Gunther) (Eleotridae, Perciformes) from the Cuitzmala River in Chamela, State of Jalisco, western Mexico. Some taxonomically important morphological features (shape of oral aperture, number and arrangement of oral papillae, presence of a gubernaculum.) are described in this species for the first time. This is the first record of V cablei from the freshwater environment, from a new host species, and from Mexico. The validity of the genus Vasorhabdochona Martin et Zam, 1967 is confirmed and its status in the classification system of the Rhabdochonidae is discussed. A key to genera of the Rhabdochonidae is provided MH - Czech Republic MH - Mexico|Distrito Federal PB - BRATISLAVA: SLOVAK ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 8 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 0440-6605 UR - ISI:000172879500010 L2 - parasitic nematode;Vasorhabdochona;fish;Gobiomorus;Mexico SO - Helminthologia 2001 ;38(4):231-235 3733 UI - 13355 AU - Moravec F AU - Vidal-Martinez VM AU - guirre-Macedo ML AU - Gonzalez-Solis D AD - Natl Polytech Inst, Ctr Res & Adv Studies, CINVESTAV, IPN, Merida 97310, Yucatan, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - First description of the male and redescription of the female of Philometra salgadoi Vidal-Martinez et al., 1995 (Nematoda : Philometridae) from the ocular cavity of the marine fish Epinephelus morio in Mexico AB - A redescription of the female and the first description of the male of the philometrid nematode Philometra salgadoi Vidal-Martinez, Aguirre-Macedo et Moravec, 1995 are presented on the basis of specimens collected from the type host, the red grouper, Epinephelus morio (Valenciennes; Pisces: Serranidae), in the Gulf of Mexico off the northern coast of Yucatan. Mexico. The morphology of this species is compared with that of related congeneric species MH - Czech Republic MH - Mexico|Yucatan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000169598400003 L2 - SERRANIDAE; PISCES SO - Parasitology Research 2001 ;87(7):526-529 3734 UI - 14193 AU - Moravec F AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicIPN, CINVESTAV, Ctr Res & Adv Studies, Parasitol Lab, Merida, Yucatan, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Some helminth parasites from Morelet's crocodile, Crocodylus moreletii, from Yucatan, Mexico AB - An examination of three specimens of the Morelet's crocodile, Crocodylus moreletii Dumeril et Bibron, from the Lagoon of Celestun, Yucatan, Mexico revealed the presence of the following eight helminth species: Acanthostomum americanum (Perez Vigueras, 1956), Pelaezia loossi (Perez Vigueras, 1956), Telorchis sp. juv., Pseudoneodiplostomum groschafti sp, n. (all trematodes), Dujardinascaris helicina (Molin, 1860), Contracaecum sp. Type 2 larvae, Micropleura sp. and Paratrichosoma recurvum (Solger, 1877) (all nematodes). Pseudoneodiplostomum groschafti sp. n. is established by indication based on the description of specimens from Crocodylus rhombifer from Cuba, given by Groschaft and Barus (1970). Acanthostomum acuti Caballero et Brennes, 1959 is considered a synonym of A. americanum. A. americanum and D. helicina are recorded for the first time from Mexico and Micropleura sp. is the first American representative of the genus recorded outside South America. Findings of A. americanum, Telorchis sp., P. groschafti, D. helicina and Micropleura sp. in C, moreletti represent new host records. Some observations on the early development of D. helicina are provided. All species, except for P. recurvum, are briefly described and illustrated and some problems concerning their morphology, taxonomy and geographical distribution are discussed MH - Czech Republic MH - Mexico|Yucatan PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 7 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000167353000008 L2 - helminths;parasites;crocodile;Yucatan;Mexico;CENOTES EQUALS SINKHOLES; FISHES; NEMATODES; ENDOHELMINTHS; TREMATODES; PENINSULA; BRAZIL; RIVER SO - Folia Parasitologica 2001 ;48(1):47-62 3735 UI - 14295 AU - Moravec F AU - guilar-Aguilar R AU - Salgado-Maldonaldo G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Systematic status of Capillaria patzcuarensis Osorio-Sarabia, Perez-Ponce de Leon et Salgado-Maldonado, 1986 (Nematoda, Capillariidae) from freshwater fishes in Mexico AB - A recent new collection of intestinal capillariids from the atherinid fish Chirostoma estor Jordan, a type host of Capillaria patzcuarensis Osorio-Sarabia, Perez-Ponce de Leon et Salgado-Maldonado, 1986, from Lake Patzcuaro in Michoacan, Mexico (type locality) made it possible to study in detail the morphology of this insufficiently known nematode parasite. Morphologically identical and apparently conspecific females were also recorded from the goodeid Alloophorus robustus (Bean) from the same locality. All main morphological and biometrical features of this species correspond to Pseudocapillaria tomentosa (Dujardin, 1843) and, therefore, C. patzcurarensis is considered a junior synonym of P. tomentosa. The Mexican specimens are briefly described and illustrated. This Holarctic, little-host specific nematode species may have been introduced into Lake Patzcuaro along with the introduction of carp, Cyprinus carpio L., in the lake MH - Czech Republic MH - Mexico|Distrito Federal PB - WARSAW: WITOLD STEFANSKI INST PARASITOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Parasitology U5 - J;Article AV - English IS - 1230-2821 UR - ISI:000167075700002 L2 - parasitic nematode;Capillaria patzcuarensis;Pseduocapillaria tomentosa;fish;Chirostoma estor;Alloophorus robustus;Patzcuaro Lake, Mexico;PISCES SO - Acta Parasitologica 2001 ;46(1):8-11 3736 UI - 13619 AU - Moreno-Hagelsieb G AU - Trevino V AU - Perez-Rueda E AU - Smith TF AU - Collado-Vides J AD - UNAM, CIFN, Lab Computat Biol, Cuernavaca 62100, Morelos, MexicoBoston Univ, Biomol Engn Res Ctr, Boston, MA 02115, USAMoreno-Hagelsieb, G, UNAM, CIFN, Lab Computat Biol, AP 565-A, Cuernavaca 62100, Morelos, Mexico TI - Transcription unit conservation in the three domains of life: a perspective from Escherichia coli AB - Here we address the question of the degree to which genes within experimentally characterized operons in one organism (Escherichia coli) are conserved in other genomes. We found that two genes adjacent within an operon are more likely both to have an ortholog in other organisms, regardless of relative position, than genes adjacent on the same strand but in two different transcription units. They are also more likely to occur next to, or fused to, one another in other genomes. Genes frequently conserved adjacent to each other, especially among evolutionarily distant species, must be part of the same transcription unit in most of them MH - Mexico|Morelos MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 11 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0168-9525 UR - ISI:000168718300004 L2 - PROTEIN FUNCTION; GENE ORDER; EVOLUTION; SEQUENCE; GENOMES; CONTEXT SO - Trends in Genetics 2001 ;17(4):175-177 3737 UI - 14414 AU - Moreno-Mendoza N AU - Harley VR AU - Merchant-Larios H AD - UNAM, Inst Invest Biomed, Dept Cell Biol, Mexico City 04510, DF, MexicoMonash Med Ctr, Prince Henrys Inst Med Res, Clayton, Vic 3168, AustraliaMerchant-Larios, H, UNAM, Inst Invest Biomed, Dept Cell Biol, Ciudad Univ,Apdo Postal 70228, Mexico City 04510, DF, Mexico TI - Temperature regulates SOX9 expression in cultured gonads of Lepidochelys olivacea, a species with temperature sex determination AB - Although sex determination starts in the gonads, this may not be the case for species with temperature sex determination (TSD). Since temperature affects the whole embryo, extragonadal thermosensitive cells may produce factors that induce gonadal sex determination as a secondary event. To establish if gonads of a species with TSD respond directly to temperature, pairs of gonads were cultured, one at female-promoting temperature (FPT) and the contralateral at male-promoting temperature (MPT). Histological and immunohistochemical detection of SOX9 revealed that the response to temperature of isolated gonads was similar to that of the gonads of whole embryos. While gonads cultured at MPT maintained SOX9 expression, it was downregulated in gonads at FPT. Downregulation of SOX9 took longer in gonads cultured at stage 23 than in gonads cultured at stage 24, suggesting that a developmental clock was already established at the onset of culture. To find out if sex commitment occurs in vitro, gonads were switched from FPT to MPT at different days. Results showed that the ovarian pathway was established after 4 days of culture. The present demonstration that gonads have an autonomous temperature detector that regulates SOX9 expression provides a useful starting point from which the molecular pathways underlying TSD can be elucidated. (C) 2001 Academic Press MH - Australia MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 9 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000166693200005 L2 - organ culture;temperature sex determination;Sox9;gonad;TURTLE; GENE; DIFFERENTIATION SO - Developmental Biology 2001 ;229(2):319-326 3738 UI - 12737 AU - Moreno-Rico O AU - Frias-Trevino AG AU - Luna-Ruiz JJ AU - Manzano-Flores DE AU - Romero-Cova S AU - Seguin-Swartz G AD - Univ Autonoma Aguascalientes, Ctr Basic Sci, Dept Microbiol, Aguascalientes, Ags, MexicoSeguin-Swartz, G, Agr & Agri Food Canada, Saskatoon Res Ctr, 107 Sci Pl, Saskatoon, SK S7N 0X2, Canada TI - Characterization and pathogenicity of isolates of Leptosphaeria maculans from Aguascalientes and Zacatecas, Mexico AB - Blackleg of crucifers caused by Leptosphaeria maculans is the most important disease of broccoli and cauliflower in central Mexico, causing up to 70% yield loss in cauliflower crops. The pathogen was isolated from broccoli crops near Aguascalientes, Ags., and Zacatecas, Zac., and culture characteristics and pathogenicity on cauliflower were examined. Colony appearance and mycelial growth on V8-juice agar, germ tube growth on water agar, and the absence of pigment production in Czapek-Dox medium were characteristic of isolates belonging to the aggressive strain. No pseudothecia formed when the Mexican isolates were paired nor when they were crossed with a tester isolate for mating type +, suggesting that all of the Mexican isolates were of mating type +. This was indirectly confirmed by the absence of the MAT-2 gene, which is associated with mating type - Reliable inoculation techniques, based on inoculation of wounded plants with pycnidiospores, were developed for cauliflower. In seedlings whose cotyledons were wound-inoculated, the fungus progressively destroyed the cotyledons, then the petioles, the cotyledonary node, and eventually the stem, resulting in dieback and a wire stem. In stem-inoculated plants, the fungus caused wire stem and leaf wilt. The Mexican isolates were aggressive to oilseed rape and belonged to pathogenicity group 2 MH - Canada MH - Mexico|Aguascalientes PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0706-0661 UR - ISI:000171451400006 L2 - blackleg;Phoma lingam;disease severity;OILSEED RAPE; BRASSICA-NAPUS; PHOMA-LINGAM; CAUSAL AGENT; HOST-RANGE; BLACKLEG; RESISTANCE; POLYMORPHISM; CRUCIFERS; INFECTION SO - Canadian Journal of Plant Pathology-Revue Canadienne de Phytopathologie 2001 ;23(3):270-278 3739 UI - 13749 AU - Morgado-Valle C AU - Garcia-Colunga J AU - Miledi R AU - az-Munoz M AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla 76001, Queretaro, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USADiaz-Munoz, M, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Juriquilla 76001, Queretaro, Mexico TI - A motif present in the main cytoplasmic loop of nicotinic acetylcholine receptors and catalases AB - A motif containing five conserved amino acids (RXPXTH (X)(14)P) was detected in 111 proteins, including 82 nicotinic acetylcholine receptor (nAChR) subunits and 20 catalases. To explore possible functional roles of this motif in nAChRs two approaches were used: first, the motif sequences in nAChR subunits and catalases were analysed and compared, and, second, deletions in the rat alpha2 and beta4 nAChR subunits expressed in Xenopus oocytes were analysed. Compared to the three-dimensional structure of bovine hepatic catalase, structural coincidences were found in the motif of catalases and nAChRs. On the other hand, partial deletions of the motif in the alpha2 or beta4 subunits and injection of the mutants into oocytes was followed by a very weak expression of functional nAChRs; oocytes injected with alpha2 and beta4 subunits in which the entire motif had been deleted failed to elicit any acetylcholine currents. The results suggest that the motif may play a role in the activation of nAChRs MH - Mexico|Queretaro MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 1 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000168512700012 L2 - motif;nicotinic acetylcholine receptor;catalase;assembly;main cytoplasmic loop;Xenopus oocytes;SITE-DIRECTED MUTAGENESIS; 3-DIMENSIONAL STRUCTURE; N-GLYCOSYLATION; DOMAIN; 5-HYDROXYTRYPTAMINE; PHOSPHORYLATION; SEQUENCES; SUBUNITS; MEMBRANE; LOCATION SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2001 ;268(1470):967-972 3740 UI - 13550 AU - Morimoto S AU - Cerbon MA AU - varez-Alvarez A AU - Romero-Navarro G AU - az-Sanchez V AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoInst Nacl Endocrinol Habana, Dept Diabet, Habana, CubaUniv Autonoma Sinaloa, Sinaloa, MexicoMorimoto, S, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Insulin gene expression pattern in rat pancreas during the estrous cycle AB - Sex steroid hormones influence insulin homeostasis and glucose metabolism, estradiol (E-2) and progesterone (P-4) induce changes in both fasting and postprandial insulinemia in rodents, however, insulin gene expression during estrous cycle is unknown. The aim of the present study was to determine an insulin gene expression pattern during the estrous cycle in the rat. Groups of 6 adult rats in each day of the estrous cycle were used. Serum P-4, E-2, testosterone (T) and insulin concentrations were determined by radioimmunoassay (RIA). A Northern blot analysis was performed to assess insulin gene expression in pancreatic tissue. We found a marked variation in insulin gene expression during the estrous cycle. The highest insulin expression was observed during the proestrus day. Interestingly, E-2 and P-4 but not T levels were correlated with changes in insulin mRNA content. The variations in serum insulin during the cycle were correlated with its mRNA content in pancreas. The overall results showed variations in serum insulin and insulin gene expression during estrous cycle of the rat that correlated with circulating E-2 and P-4 levels. (C) 2001 Elsevier Science Inc. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000169038000009 L2 - rat pancreas;estrous cycle;insulin;insulin expression;sex hormones;POLYCYSTIC-OVARY-SYNDROME; MENSTRUAL-CYCLE; GLUCOSE-TOLERANCE; PLASMA-INSULIN; WOMEN; HORMONES; SENSITIVITY; SECRETION; PREGNANCY; ISLETS SO - Life Sciences 2001 ;68(26):2979-2985 3741 UI - 12465 AU - Morita R AU - Bai DS AU - Alonso ME AU - Suzuki T AU - Sugimoto Y AU - Amano K AU - Medina MT AU - Bailey JN AU - Rasmussen A AU - Ramos-Peek J AU - Cordova S AU - Rubio-Donnadieu F AU - Inazawa J AU - Jara-Prada A AU - Ochoa A AU - Yamakawa K AU - gado-Escueta AV AD - Inst Phys & Chem Res, Inst Brain Sci, Lab Neurogen, Wako, Saitama, JapanUniv Calif Los Angeles, CEP, Epilepsy Genet Genom Lab, Los Angeles, CA, USAGLAHS, VA, Los Angeles, CA, USANatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoTokyo Med & Dent Univ, Med Res Inst, Div Genet, Dept Mol Cytogenet, Tokyo, JapanAutonomous Univ, Tegucigalpa, HondurasUniv Calif Los Angeles, Inst Neuropsychiat, Los Angeles, CA 90024, USA TI - Juvenile myoclonic epilepsy in chromosome 6p11: Recombinations and haplotype sharing reduce the candidate region to 500 kb MH - Honduras MH - Japan MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648902069 SO - American Journal of Human Genetics 2001 ;69(4):534-534 3742 UI - 13850 AU - Moron MA AU - Solis A AD - Inst Ecol, AC Sector SEP CONACYT, Dept Entomol, Xalapa 91000, Veracruz, MexicoInst Nacl Biodiversidad, Dept Entomol, Santo Domingo Heredia, Costa RicaMoron, MA, Inst Ecol, AC Sector SEP CONACYT, Dept Entomol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Seven new species of Phyllophaga (s.str.) Harris from Costa Rica (Coleoptera : Melolonthidae : Melolonthinae) AB - New species of Phyllophaga (s.str.) are described from 12 Costa Rican localities as follows: P. tilarana new species, P. tapantina new species, P. talamancana new species, P. guapiloides new species, and P. puntarenosa new species from Cartago y Puntarenas provinces: P. naranjina new species, and P. torencita new species from Alajuela and Cartago provinces. Most of these species are from submontane rain forests located between 800 and 1,750 m of altitude; P. talmancana and P. naranjina were collected in grasslands or coffee plantations, and P. puntarenosa was collected between 50 and 1,200 m of altitude in areas including tropical deciduous forests. Drawings of male genital capsules, female genital plates and tarsal claws are provided MH - Costa Rica MH - Mexico|Veracruz PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000168258800003 SO - Coleopterists Bulletin 2001 ;55(1):11-29 3743 UI - 13852 AU - Moron MA AU - Howden HF AD - AC Sector SEP CONACYT, Inst Ecol, Dept Entomol, Xalapa 91000, Veracruz, MexicoCanadian Museum Nat, Ottawa, ON K1P 6P4, CanadaMoron, MA, AC Sector SEP CONACYT, Inst Ecol, Dept Entomol, Apdo Postal 63, Xalapa 91000, Veracruz, Mexico TI - New species in the genus Dilophochila Bates (Coleoptera : Melolonthidae : Rutelinae : Anomalini) AB - Four species are added to the genus Dilophochila Bates (Melolonthidae: Rutelinae: Anomalini). The new species are: D. brevisetosa new species from pine and oak forests near San Cristobal de las Cases, Chiapas. Mexico: D. gilli new species from pine forest at Cerro Uyuca. F. Morazan. Honduras: D. miahuatleca new species from oak and pine forests in the southern mountains of Oaxaca. Mexico: and D. zacapana new species from pine forest near San Lorenzo. Zacapa, Guatemala. These species are described, illustrated, and a key is presented for all six known species in the genus MH - Canada MH - Mexico|Veracruz PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000168258800008 SO - Coleopterists Bulletin 2001 ;55(1):51-64 3744 UI - 13258 AU - Morozov DK AU - Pekker M AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Texas, Inst Fus Studies, Austin, TX 78712, USAMorozov, DK, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, 70-543, Mexico City 04510, DF, Mexico TI - Decompressive (cooling rarefaction) shock in optically thin radiative plasma AB - It is shown that the decompressive shock, i.e., a shock where the pressure behind the front is smaller than the pressure ahead of it, is possible in a radiative plasma; this is in contrast to the situation in classic gas dynamics. An example of a steady state decompressive shock wave for a simple, but realistic model for radiative losses is presented. It is shown that it satisfies the Landau stability criteria MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169907300105 L2 - INSTABILITIES; DYNAMICS; WAVES SO - Physical Review e 2001 ;6401(1): 3745 UI - 13419 AU - Morton O AU - Puchelt H AU - Hernandez E AU - Lounejeva E AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Karlsruhe, Inst Petrog & Geochem, Karlsruhe, GermanyUniv Nacl Autonoma Mexico, Inst Geol, Mexico City, DF, MexicoMorton, O, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Traffic-related platinum group elements (PGE) in soils from Mexico City AB - The first evaluation of the distribution of platinum group elements (PGE) derived from automobile catalytic converters in urban soil samples in Mexico City was carried out. There are more than four millions cars in Mexico City and, at the present time, one third of them have catalytic converters. PGE concentrations in soils exposed to high traffic densities exceed the natural background values by upto two orders of magnitude and are directly influenced by traffic conditions. The highest concentrations of Pt, Pd and Ph in the analyzed samples are about 300, 70 and 40 mug/l, respectively. Although the PGE concentrations found in soil samples are relatively low, they represent an accumulation of only 10 yr. It is likely that the use of catalytic converters will dramatically change the distribution of these metals in the urban environment in the next decades. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000169461400004 L2 - platinum-group elements (PGE);catalytic converter;environment;anthropogenic emissions;CATALYTIC-CONVERTERS; EMISSIONS; BEHAVIOR; ENGINE; METALS SO - Journal of Geochemical Exploration 2001 ;72(3):223-227 3746 UI - 13518 AU - Moshinsky M AU - Schuch D AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Frankfurt, Inst Theoret Phys, D-6000 Frankfurt, GermanyMoshinsky, M, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Diffraction in time with dissipation AB - The more usual problems discussed in classical mechanics in elementary textbooks are the non-dissipative ones in which there is a Hamiltonian representing the energy as a constant of motion. The translation of this type of problem to quantum mechanics is very well known. Conversely, there are very simple classical mechanical problems that involve dissipation, but whose translation to quantum mechanics on the basis of a corresponding Hamiltonian is sometimes misinterpreted, since the underlying classical formalism involves non-canonical transformations that lead to non-unitary transformations of the quantum mechanical wavefunctions, In this paper we shall discuss the problem of a beam of particles of given momentum incident from the left on a shutter that is opened at time t = 0. The solution has the well known properties of diffraction in time, but we will analyse it quantum mechanically both when dissipation is and is not present. The objective is to get a better understanding of the effect of dissipation in the quantum mechanical picture and to estimate the influence of the above mentioned non-unitary transformations on this particular problem MH - Germany MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000169140800020 L2 - SYSTEMS SO - Journal of Physics A-Mathematical and General 2001 ;34(19):4217-4225 3747 UI - 13536 AU - Mosina LV AU - Raitsimring AM AU - Inoue MB AU - Fernando Q AU - Inoue M AD - Russian Acad Sci, Kazan Phys Tech Inst, Kazan 420029, RussiaUniv Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonroa, Ctr Invest Polimeros & Mat, Hermosillo, Sonora, MexicoMosina, LV, Russian Acad Sci, Kazan Phys Tech Inst, Sibirsky Trakt 10-7, Kazan 420029, Russia TI - Evaluation of exchange interaction in binuclear copper(II) chelates of amide-based cyclophanes AB - Temperature dependence of the electron paramagnetic resonance (EPR) spectra of binuclear Cu(II) complexes with amide-based cyclophanes, Cu-2(bis-EDTAPDN), Cu-2(bis-EDTANAP) and Cu-2(bis-EDTABPE), in 60% methanol (pH ca. 10) has been studied at a frequency of 9.43 GHz in the temperature range of 77-4.2 K; the cyclophanes are macrocyclic compounds in which foul amide bonds link two ethylenediaminetetraacetate (EDTA) units and two units of the aromatic diamine 1,4-phenylenediamine (DPN), 1,5-diaminonaphthalene (NAP) or bis(4-aminophenyl) ether (BPE). Exchange integrals found from the EPR measurements are ca. 70-105 cm(-1), 22 cm(-1) and J less than or equal to 0, for Cu-2(bis-EDTAPDN), Cu-2(bis-EDTANAP) and Cu-2(bis-EDTABPE), respectively; the sign of J is defined to be positive for antiferromagnetic interaction. The variation of exchange interactions in these compounds is related to the nature of the bridging organic groups MH - Mexico|Sonora MH - Russia MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical;Spectroscopy U5 - J;Article AV - English IS - 0937-9347 UR - ISI:000169163200017 SO - Applied Magnetic Resonance 2001 ;20(1-2):249-255 3748 UI - 14065 AU - Moukarzel CF AD - Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, BrazilIPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoMoukarzel, CF, Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil TI - Isostaticity in granular matter AB - Recent work (PRL V81, 1998, p. 1634) has proven that cohesionless granular packings are isostatic in the limit of low applied pressure, and suggested that this property is responsible for the peculiar static behavior of granular materials. On disordered isostatic systems, stress-stress response functions are power-law distributed, with a cutoff that grows exponentially with distance. If the external pressure is increased sufficiently, excess contacts are created, the packing becomes hyperstatic, and the medium behaves as a normal elastic continuum. I discuss here these ideas briefly, and also report on numerical results (mainly stress distributions) from a simple two-dimensional model of packings which captures the essential physics of stress transmission in granulates under varying load conditions MH - Brazil MH - Mexico|Yucatan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 1434-5021 UR - ISI:000167654000008 L2 - sandpailes;granular matter;stress;isostaticity;STRESS-DISTRIBUTION; FORCE FLUCTUATIONS; NONLOCAL APPROACH; BEAD PACKS; MEDIA; SYSTEMS; MODEL; FRICTION; PACKINGS SO - Granular Matter 2001 ;3(1-2):41-52 3749 UI - 12974 AU - Mount DB AU - Gamba G AD - Vanderbilt Univ, Med Ctr, Dept Med, Div Nephrol & Hypertens, Nashville, TN 37232, USANashville Vet Affairs Med Ctr, Nashville, TN, USANatl Autonomous Univ Mexico, Salvador Zubiran Natl Inst Med Sci & Nutr, Mol Physiol Unit, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Biomed Res, Mexico City 04510, DF, MexicoMount, DB, Vanderbilt Univ, Med Ctr, Dept Med, Div Nephrol & Hypertens, S-3323 Med Ctr N, Nashville, TN 37232 USA TI - Renal potassium-chloride cotransporters AB - The electroneutral cotransport of potassium and chloride is mediated by potassium-chloride transporters, which are encoded by members of the gene family of cation-chloride cotransporters. A significant body of evidence argues for swelling-activated, basolateral potassium-chloride transport in the proximal tubule and thick ascending limb, with a potential role in transepithelial salt transport. However, the lack of specific inhibitors has impeded progress in this area. The cloning of the four potassium-chloride cotransporter genes has sparked new interest in this transport pathway, and promises to yield novel insights into their roles in cellular and renal physiology. Curr Opin Nephrol Hypertens 10:685-691. (C) 2001 Lippincott Williams & Wilkins MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 20 U4 - Urology & Nephrology;Peripheral Vascular Disease U5 - J;Review AV - English IS - 1062-4821 UR - ISI:000170714200021 L2 - K-CL COTRANSPORT; THICK ASCENDING LIMB; RED-BLOOD-CELLS; VOLUME-SENSITIVE KINASE; KCL CO-TRANSPORT; BASOLATERAL MEMBRANE; HUMAN-ERYTHROCYTES; MOLECULAR-CLONING; PROXIMAL TUBULE; COLLECTING DUCT SO - Current Opinion in Nephrology and Hypertension 2001 ;10(5):685-691 3750 UI - 12744 AU - Moya-Raygoza G AU - Larsen KJ AD - Luther Coll, Dept Biol, Decorah, IA 52101, USAUniv Guadalajara, CUCBA, Dept Bot & Zool, Zapopan 45110, Jalisco, MexicoMoya-Raygoza, G, Luther Coll, Dept Biol, 700 Coll Dr, Decorah, IA 52101 USA TI - Temporal resource switching by ants between honeydew produced by the fivespotted gama grass leafhopper (Dalbulus quinquenotatus) and nectar produced by plants with extrafloral nectaries AB - A field study was conducted in Jalisco, Mexico, to quantify temporal resource switching by ants between honeydew produced by the fivespotted gama grass leafhopper, Dalbulus quinquenotatus, and nectar produced by plants with extrafloral nectaries (EFNs). Four plant taxa (Acacia pennatula, Leucaena esculenta, Lobelia laxiflora and Lysilona sp.) which produced nectar from EFNs were monitored for ants during the dry and wet seasons in ecological communities where D. quinquenotatus was tended by ants on their gama grass (Tripsacum spp.) hosts. These plants with EFNs were visited preferentially in May (the driest month) by Brachymyrmex obscurior, a common ant species that tended D. quinquenotatus in all months except May. Our results suggest temporal resource switching by ants between plants with EFNs and D. quinquenotatus. This cycle is regulated by the amount of nectar produced by plants with EFNs and honeydew produced by D. quinquenotatus. Although B. obscurior was the most common ant to visit plants with EFNs and tend D. quinquenotatus, four additional species of ants were also associated with both food resources MH - Mexico|Jalisco MH - USA PB - NOTRE DAME: AMER MIDLAND NATURALIST RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0003-0031 UR - ISI:000171342200008 L2 - HOMOPTERA MUTUALISMS; LIMITING RESOURCE; RAIN-FOREST; CICADELLIDAE; ASSOCIATION; PROTECTION; COMPETITION; HYMENOPTERA; FORMICIDAE; PREDATION SO - American Midland Naturalist 2001 ;146(2):311-320 3751 UI - 14073 AU - Moya M AU - Ansari AS AU - Pandis SN AD - Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213, USACarnegie Mellon Univ, Dept Engn & Publ Policy, Pittsburgh, PA 15213, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04310, DF, MexicoPandis, SN, Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA TI - Partitioning of nitrate and ammonium between the gas and particulate phases during the 1997 IMADA-AVER study in Mexico City AB - The partitioning of nitrate and ammonium between the gas and particulate phases is studied combining available equilibrium models and measurements taken in Mexico City during the 1997 IMADA-AVER held campaign. Based on this analysis, there are no significant differences in model predictions, but some discrepancies exist between predictions and observations. The inclusion of crustal elements in the modeling framework improves agreement of model predictions: for particulate nitrate against measurements by approximately 5%. Although some equilibrium aerosol models do not explicitly treat crustal elements, these species can be treated as equivalent concentrations of sodium. Atmospheric equilibrium models predict daily average PM2.5 nitrate concentrations within 20% of the IMADA-AVER measurements at the MER site. Six-hour average PM2.5 nitrate concentrations an predicted within 30-50% on average except for the afternoon sampling periods (12:00-18:00h). Investigating the possible sources of these discrepancies, it appears that a dynamic instead of an equilibrium approach is more suitable in reproducing aerosol behaviour during these afternoon periods. By applying the Multicomponent Aerosol Dynamic Model (MADM), model performance in predicting concentrations of particulate nitrate significantly improves during the afternoon periods. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000167745600008 L2 - IMADA-AVER;inorganic aerosols;atmospheric equilibrium models;thermodynamic equilibrium;aerosol dynamics;POLLUTION MODELING SYSTEM; CALIFORNIA AIR-QUALITY; AEROSOL EQUILIBRIUM; ATMOSPHERIC AEROSOLS; NITRIC-ACID; THERMODYNAMIC MODEL; SIZE; SIMULATIONS; TRANSITIONS; DYNAMICS SO - Atmospheric Environment 2001 ;35(10):1791-1804 3752 UI - 12364 AU - Mozerov M AU - Kober V AU - Choi TS AD - Kwangju Inst Sci & Technol, Dept Mechatron, Kwangju 506712, South KoreaCICESE, Dept Opt, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoMozerov, M, Kwangju Inst Sci & Technol, Dept Mechatron, 572 Ssang Am Domg, Kwangju 506712, South Korea TI - Improved motion stereo matching based on a modified dynamic programming AB - A new method for computing precise depth map estimates of 3-D shape of a moving object is proposed. The 3-D shape recovery in motion stereo is formulated as a matching optimization problem of multiple stereo images. The proposed method is a heuristic modification of dynamic programming applied to a 2-D optimization problem. The 3-D shape recovery using real motion stereo images demonstrates a good performance of the algorithm in terms of reconstruction accuracy. (C) 2001 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - South Korea PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000172142500027 L2 - motion stereo;stereo vision;modified dynamic programming;3-D shape recovery;SEGMENT SO - Optical Engineering 2001 ;40(10):2234-2239 3753 UI - 14071 AU - Mugica V AU - Vega E AU - Chow J AU - Reyes E AU - Sanchez G AU - Arriaga J AU - Egami R AU - Watson J AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 2200, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Nevada, Desert Res Inst, Reno, NV 89506, USAMugica, V, Univ Autonoma Metropolitana Azcapotzalco, Av San Pablo 180,Col Reynosa Tamaulipas Azcapotza, Mexico City 2200, DF, Mexico TI - Speciated non-methane organic compounds emissions from food cooking in Mexico AB - Non-methane organic compound (NMOC) emissions from different sorts of food preparation sites, were quantified for the first time in Mexico, in order to develop emission profiles for further application in the chemical mass balance receptor model (CMB). Restaurants using charcoal grills and LP gas stoves, "tortillerias", food frying places and rotisseries were sampled using SUMMA((R)) stainless-steel canisters to analyse NMOC by high-resolution gas chromatography. The results obtained show that profiles determined from food cooking processes have similarities to those found in LP gas combustion, which is the most common fuel in Mexico used for this purpose, although there were differences in the relative composition of propane and butane in both cases. This suggests that, the rates of combustion of propane and butane are different. It has also been detected that propene, a reactive olefin is produced during the combustion process. The obtained profiles of restaurants, rotisseries and fried food show an important contribution of two carbon compounds (ethane, ethylene and acetylene) that can be attributed to the complex process of grease and meat cooking. The presence of these compounds cannot be attributed to vehicular sources since the concentrations are higher than in ambient air. These were also determined from aromatic compounds such as benzene, toluene and xylene in the combustion of vegetal charcoal. The measured concentrations indicate that NMOC emissions from cooking may become an important indoor source of NMOC under crowded conditions in closed places. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000167745600002 L2 - NMOC emission;air pollution;Mexico City;source profiles;CITY; PROFILES SO - Atmospheric Environment 2001 ;35(10):1729-1734 3754 UI - 13720 AU - Muhl S AU - Camps E AU - Escobar-Alarcon L AU - Olea O AU - Miki M AU - Morrison NA AD - UNAM, Inst Invest Mat, Mexico City, DF, MexicoInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUAEM, Mexico City, DF, MexicoCIMAV, Chihuahua, Coahuila, MexicoUniv Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandMuhl, S, UNAM, Inst Invest Mat, Mexico City, DF, Mexico TI - DLC films prepared by electron evaporation of graphite in an ECR plasma AB - Films of diamond-like carbon (DLC) have been prepared by a novel electron evaporation scheme in an argon plasma within a linear microwave ECR reactor. The electrons present in the high density ECR plasma are attracted to a biased graphite rod to such an extent that the carbon is thermally evaporated. The argon ions bombard the substrate with an energy determined by the plasma potential and the substrate bias. However, the plasma potential is determined by the size of the graphite rod as well as the applied voltage. The films have been analysed using the following techniques: profilometry (thickness and residual stress); ellipsometry (refractive index and thickness); Raman spectroscopy (atomic bonding); UV-Vis spectrophotometry (bandgap), PEELS (C sp(3)), EDX and RES (chemical analysis). The results are discussed in terms of the knock-on subplantation model [Rad. Effects Defects Solids, 142 (1997) 63] and the recently published interpretation of the Raman spectra of carbon films [Phys. Rev. B, 61 (2000) 14095]. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0925-9635 UR - ISI:000168730600116 L2 - diamond-like carbon;ECR plasma;ellipsometry;DIAMOND-LIKE CARBON; HYDROGENATED AMORPHOUS-CARBON; PULSED-LASER DEPOSITION; ION ENERGY; BEAM; TEMPERATURE; MICROSCOPY; MICROWAVE; NITRIDE; GROWTH SO - Diamond and Related Materials 2001 ;10(3-7):915-919 3755 UI - 14265 AU - Muller A AU - Homey B AU - Soto H AU - Ge NF AU - Catron D AU - Buchanan ME AU - McClanahan T AU - Murphy E AU - Yuan W AU - Wagner SN AU - Barrera JL AU - Mohar A AU - Verastegui E AU - Zlotnik A AD - DNAX Res Inst Mol & Cellular Biol Inc, Dept Immunol, Palo Alto, CA 94304, USAUniv Dusseldorf, Dept Radiat Oncol, D-40225 Dusseldorf, GermanyUniv Dusseldorf, Dept Dermatol, D-40225 Dusseldorf, GermanyUniv Essen, Dept Dermatol, D-45147 Essen, GermanyInst Nacl Cancerol, Mexico City 14000, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoZlotnik, A, DNAX Res Inst Mol & Cellular Biol Inc, Dept Immunol, 901 Calif Ave, Palo Alto, CA 94304 USA TI - Involvement of chemokine receptors in breast cancer metastasis AB - Breast cancer is characterized by a distinct metastatic pattern involving the regional lymph nodes, bone marrow, lung and liver. Tumour cell migration and metastasis share many similarities with leukocyte trafficking, which is critically regulated by chemokines and their receptors. Here we report that the chemokine receptors CXCR4 and CCR7 are highly expressed in human breast cancer cells, malignant breast tumours and metastases. Their respective ligands CXCL12/SDF-1 alpha and CCL21/6Ckine exhibit peak levels of expression in organs representing the first destinations of breast cancer metastasis. In breast cancer cells, signalling through CXCR4 or CCR7 mediates actin polymerization and pseudopodia formation, and subsequently induces chemotactic and invasive responses. In vivo, neutralizing the interactions of CXCL12/CXCR4 significantly impairs metastasis of breast cancer cells to regional lymph nodes and lung. Malignant melanoma, which has a similar metastatic pattern as breast cancer but also a high incidence of skin metastases, shows high expression levels of CCR10 in addition to CXCR4 and CCR7. Our findings indicate that chemokines and their receptors have a critical role in determining the metastatic destination of tumour cells MH - USA MH - Germany MH - Mexico|Distrito Federal PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 1166 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000167194300037 L2 - CHRONIC LYMPHOCYTIC-LEUKEMIA; SKIN-ASSOCIATED CHEMOKINE; CELL-DERIVED FACTOR-1; FACTOR-I; FUNCTIONAL-RESPONSE; TUMOR PROGRESSION; STROMAL CELLS; MICE LACKING; CXCR4; EXPRESSION SO - Nature 2001 ;410(6824):50-56 3756 UI - 14140 AU - Muller HG AU - Carey JR AU - Wu DQ AU - Liedo P AU - Vaupel JW AD - Univ Calif Davis, Dept Stat, Davis, CA 95616, USAUniv Calif Davis, Dept Entomol, Davis, CA 95616, USAMax Planck Inst Demog Res, D-18057 Rostock, GermanyEl Colegio Frontera Sur, Tapachula, Chiapas, MexicoMuller, HG, Univ Calif Davis, Dept Stat, 1 Shields Ave, Davis, CA 95616 USA TI - Reproductive potential predicts longevity of female Mediterranean fruitflies AB - Reproduction exacts a price in terms of decreased survival. Our analysis of the interplay between age patterns of fecundity and mortality for individual female medflies (Ceratitis capitata) revealed that individual mortality is associated with the time-dynamics of the egg-laying trajectory In a sample of 531 medflies, we found that each individual has a characteristic rate of decline in egg laying with age. This defines an individual's rate of reproductive exhaustion. This rate was shown to predict subsequent mortality. The larger the remaining reproductive potential, the lower the subsequent mortality An increased mortality risk was seen in flies for which egg production declined rapidly early on, irrespective of the level of egg production. Thus, reproductive potential and lifetime are coupled in such a way that those flies which are able to profit most from an extended life span in terms of increased egg output are indeed likely to live longer MH - Germany MH - Mexico|Chiapas MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 27 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000167432800001 L2 - reproductive clock;mortality;depletion of eggs;egg-laying trajectory;modelling;bootstrap;CERATITIS-CAPITATA; FLY FEMALES; LIFE; EVOLUTION; ADAPTATIONS; OPTIMALITY; SENESCENCE; MORTALITY; SURVIVAL; COHORT SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2001 ;268(1466):445-450 3757 UI - 14142 AU - Muller M AU - Heiss WD AU - Jung C AU - Rotter I AD - Max Planck Inst Phys Complex Syst, D-01187 Dresden, GermanyUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Witwatersrand, Dept Phys, ZA-2001 Johannesburg, South AfricaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoRotter, I, Max Planck Inst Phys Complex Syst, Nothnitzer Str 38, D-01187 Dresden, Germany TI - Globally collective effects in open quantum systems AB - We studied the behaviour of open quantum systems as a function of the coupling strength to one decay channel in a simple scattering model. Under critical conditions a reorganization of the spectrum occurs that causes a bifurcation of the time scales. We derive analytically the condition under which the reorganization process can be understood as a second-order phase transition. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos MH - South Africa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000167346200033 L2 - level repulsion;phase transition;interference of resonances;PHASE-TRANSITIONS SO - Physica e 2001 ;9(3):509-512 3758 UI - 13686 AU - Munoz-Andrade JD AU - Mendoza-Allende A AU - Torres-Villasenor G AU - Montemayor-Aldrete JA AD - Univ Autonoma Metropolitana Unidad Azcapotzalco, Dept Mat, Div Ciencias Basicas & Ingn, Mexico City 02200, DF, MexicoCent Univ Venezuela, Fac Ingn, Program Individualized Doctorate, Caracas, VenezuelaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoMunoz-Andrade, JD, Univ Autonoma Metropolitana Unidad Azcapotzalco, Dept Mat, Div Ciencias Basicas & Ingn, Av San Pablo 180, Mexico City 02200, DF, Mexico TI - Cooperative grain boundary sliding at room temperature of a Zn-20.2%Al-1.8%Cu superplastic alloy AB - By applying a new technique [1-2] which provides a mesoscopic coordinate system inscribed on the surface of a tensile specimen, with 371 mum gage length for a Zn-20.2%Al-1.8%Cu superplastic alloy deformed at room temperature it is possible to show that: Deformation of the sample it is homogeneous at macroscopic level, but inhomogeneous at mesoscopical level. The inhomogeneity is ascribed to the sliding of grain blocks. For 28.5% of deformation the distribution function for the block sizes is described by: N(x) = 1.37 x(3)exp(-3x/12.2 mum), where, N(x) is the number of blocks of size x, inside an area of about 172 X 244 (mum)(2) MH - Mexico|Distrito Federal MH - Venezuela PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000168667100082 L2 - DEFORMATION SO - Superplasticity in Advanced Materials, Icsam-2000 2001 ;357-3():551-558 3759 UI - 13569 AU - Munoz-Garay C AU - de la Vega-Beltran J AU - Delgado R AU - Labarca P AU - Felix R AU - Darszon A AD - UNAM, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca, Morelos, MexicoIPN, Dept Fisiol Biofis & Neurociencias, Mexico City 07738, DF, MexicoCtr Estudios Cient, Valdivia, ChileMunoz-Garay, C, UNAM, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca, Morelos, Mexico TI - Inwardly rectifying K+ channels in spermatogenic cells: Functional expression and implication in sperm capacitation AB - To fertilize, mammalian sperm must complete a maturational process called capacitation. It is thought that the membrane potential of sperm hyperpolarizes during capacitation, possibly due to the opening of K+ channels, but electrophysiological evidence is lacking. In this report, using patch-clamp recordings obtained from isolated mouse spermatogenic cells we document the presence of a novel K+-selective inwardly rectifying current. Macroscopic current activated at membrane potentials below the equilibrium potential for K+ and its magnitude was dependent on the external K+ concentration. The channels selected K+ over other monovalent cations, Current was virtually absent when external K+ was replaced with Na+ or N-methyl-D-glucamine. Addition of Cs+ or Ba2+ (IC50 of similar to 15 muM) to the external solution effectively blocked K+ current. Dialyzing the cells with a Mg2+-free solution did not affect channel activity. Cytosolic acidification reversibly inhibited the current. We verified that the resting membrane potential of mouse sperm changed from -52 +/- 6 to -66 +/- 9 mV during capacitation in vitro. Notably, application of 0.3-1 mM Ba2+ during capacitation prevented this hyperpolarization and decreased the subsequent exocytotic response to zona pellucida. A mechanism is proposed whereby opening of inwardly rectifying K+ channels may produce hyperpolarization under physiological conditions and contribute to the cellular changes that give rise to the capacitated state in mature sperm. (C) 2001 Academic Press MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 24 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000169059300020 L2 - K+ channel;inward-rectifier;spermatogenic cells;sperm capacitation;sperm acrosome reaction;PROTEIN-TYROSINE PHOSPHORYLATION; ACROSOME REACTION; MOUSE SPERM; ANOMALOUS RECTIFICATION; MAMMALIAN SPERM; POTASSIUM CHANNELS; XENOPUS OOCYTES; STARFISH EGG; RAT TESTIS; PH SO - Developmental Biology 2001 ;234(1):261-274 3760 UI - 12710 AU - Munoz-Gotera RJ AU - Hernandez-Gonzalez EO AU - Mendoza-Hernandez G AU - Contreras RG AU - Mujica A AD - Inst Politecn Nacl, Dept Biol Celular, Ctr Invest & Estud Avanzados, Mexico City, DF, MexicoInst Politecn Nacl, Dept Fisiol & Neurociencias, Ctr Invest & Estud Avanzados, Mexico City, DF, MexicoUniv Zulia, Fac Ciencias Vet, Maracaibo 4011, Estado Zulia, VenezuelaUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoMujica, A, Inst Politecn Nacl, Dept Biol Celular, Ctr Invest & Estud Avanzados, Mexico City, DF, Mexico TI - Exocytosis of a 60 kDa protein (Calreticulin) from activated hamster oocytes AB - The sp50 protein localized at the acrosomal region of guinea pig sperm was suggested to participate in acrosome exocytosis, the acrosome reaction (AIR). On the other hand, the cortical reaction (CR), also an exocytotic event, occurs during egg activation. The aim of the present work was to identify sp50 and also to define if sp50 is present in hamster eggs, as well as its location before and after CR. Sp50 was identified as calreticulin (CRT), based on: (a) its NH2-terminal amino acid (25 aa) sequence, (b) a cross-recognition of pure sp50 and pure CRT with anti-CRT (from Santa Cruz, anti-CRTsc), and anti-sp50 (anti-sp50/CRT) antibodies, respectively, and (c) that both antibodies revealed a 50 kDa protein in a Brij sperm extract. On the other hand, CRT presence in eggs was positively determined by Western blotting (Wb) using anti-sp50/CRT antibody which recognized a 60 kDa protein in the egg extract, and by indirect immunofluorescence (IIF), CRT was located in the cortical granules (CG). It was defined by a granular pattern and co-localization with mannose, a specific carbohydrate of the CG. Additionally, a decrease in CRT concentration occurred in eggs after their activation and, in parallel, the protein was revealed in the egg's incubation medium. In activated eggs with zona pellucida (ZP), CRT remains as a halo in the perivitelline space and around the polar body. From these results we suggest that: (1) CRT is present in the CG of non-activated hamster eggs, (2) CRT is exocytosed during the CR, in response to egg activation, and (3) CRT might participate in the block to polyspermy, together with other CG components. (C) 2001 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Venezuela PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Cell Biology;Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1040-452X UR - ISI:000171387100016 L2 - cortical reaction;cortical granules;perivitelline space;guinea pig spermatozoa;fertilization;block to polyspermy;CORTICAL GRANULE ENVELOPE; CELL-SURFACE CALRETICULIN; CALCIUM-BINDING PROTEIN; SEA-URCHIN EGGS; ACROSOME REACTION; EXTRACELLULAR-MATRIX; MOUSE EGGS; PERIVITELLINE SPACE; T-LYMPHOCYTES; ZONA REACTION SO - Molecular Reproduction and Development 2001 ;60(3):405-413 3761 UI - 13399 AU - Munoz DF AU - Glynn PW AD - Inst Tecnol Autonomo Mexico, Dept Ingn Ind, Mexico City 01000, DF, MexicoStanford Univ, Dept EES & OR, Stanford, CA 94305, USAMunoz, DF, Inst Tecnol Autonomo Mexico, Dept Ingn Ind, Mexico City 01000, DF, Mexico TI - Multivariate standardized time series for steady-state simulation output analysis AB - The theory of standardized time series. initially proposed to estimate a single steady-state mean from the output of a simulation, is extended to the case where: more than one steady-state mean is to be estimated simultaneously. Under mild assumptions on the stochastic process representing the output of the simulation, namely a functional central limit theorem. we obtain asymptotically valid confidence regions for a (multivariate) steady-state mean based on multivariate standardized lime series. We provide examples of multivariate standardized time series, including the multivariate versions of the batch means method and Schruben's standardized sum process. Large sample properties of confidence regions obtained from multivariate standardized time series are discussed. We show that, as in the univariate case. the asymptotic expected volume of confidence regions produced by standardized time series procedures is larger than that obtained from a consistent estimation procedure. We present and discuss experimental results that illustrate our theory MH - Mexico|Distrito Federal MH - USA PB - LINTHICUM HTS: INST OPERATIONS RESEARCH MANAGEMENT SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0030-364X UR - ISI:000169449900007 L2 - ESTIMATORS SO - Operations Research 2001 ;49(3):413-422 3762 UI - 14185 AU - Munoz L AU - Gonzalez-Valencia G AU - Perez-Perez GI AU - Giono-Cerezo S AU - Munoz O AU - Torres J AD - Hosp Pediat, Inst Mexicano Seguro Social, Unidad Invest Envermedades Infecc, Mexico City, DF, MexicoInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City, DF, MexicoNYU, Sch Med, Div Infect Dis, New York, NY, USATorres, J, Inst Mexicano Seguro Social, Ctr Med Nacl Siglo XXI, Unidad Invest Enfermedades Infecc, Av Cuauhtemoc 330, Mexico City 06725, DF, Mexico TI - A comparison of Lewis X and Lewis Y expression in Helicobacter pylori obtained from children and adults AB - There are no reports, to our knowledge, on the expression of Lewis (Le) antigens in Helicobacter pylori isolates from children. The aim of this study was to compare the expression of Le antigens by H. pylori isolates from children and from adults. Totals of 278 clones from 22 children with recurrent abdominal pain and 293 clones from 22 adults with (n = 10) or without (n = 12) duodenal ulcer were studied. Expression of Le(x) and Le(y) antigens was determined by ELISA, using monoclonal anti-Le antibodies. The Le phenotype of the patients was determined in gastric juice with a hemagglutination assay. Clones expressing Le(x) were more common in children than in adults (55.4% vs. 33.4%, respectively; P < .01), and Le(y) was more common in adults than in children (81.6% vs. 66%, respectively; P < .01). A trend analysis showed a significant decline in frequency of clones expressing Le(x) with age (P = .021). In this community, expression of Le antigens differs in H. pylori isolates obtained from children versus adults MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000167366900025 L2 - BLOOD-GROUP ANTIGENS; PHASE VARIATION; LIPOPOLYSACCHARIDE; HOST; PHENOTYPE; GENE SO - Journal of Infectious Diseases 2001 ;183(7):1147-1151 3763 UI - 11623 AU - Murillo-Alvarez JI AU - Encarnacion DR AU - Franzblau SG AD - Univ Autonoma Baja California Sur, Dept Agron, La Paz 23080, BCS, MexicoGillis W Long Hansens Dis Ctr, Lab Res Branch, Pharmacol Res Dept, Baton Rouge, LA, USAEncarnacion, DR, Univ Autonoma Baja California Sur, Dept Agron, AP 19-B, La Paz 23080, BCS, Mexico TI - Antimicrobial and cytotoxic activity of some medicinal plants from Baja California Sur (Mexico) AB - Scientific evaluation of 25 ethanol extract of plants used in the traditional medicine of Baja California Sur (Mexico) were tested for microbial and HCT-116 cell growth inhibition. Ten extracts showed activity against the HCT-116 cell line, notably Asclepias subulata (Asclepiadaceae), Aristolochia brevipes (Aristolochiaceae) and Bursera odorata (Burseraceae). Haplopappus sonorensis (Asteraceae) Asclepias subulata and Bursera odorata inhibited Mycobacterium tuberculosis by 40, 45 and 67%, respectively, at a concentration of 100 mug/mL. Antimicrobial activity against Bacillus subtilis, Staphylococcus aureus, Streptococcus faecalis, Candida albicans and Escherichia coli was determined, and Aristolochia monticola, A. brevipes, Hymenoclea monogyra and Hymenoclea sp. were found to be the most active. Xanthium strumarium showed low activity against C. albicans MH - Mexico|Baja California Sur MH - USA PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Medical Laboratory Technology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1388-0209 UR - ISI:000174374700010 L2 - antimicrobial;antimycobacterial;Baja California Sur, Mexico;cytotoxicity;medicinal plants;ANTIBIOTICS; RESISTANCE SO - Pharmaceutical Biology 2001 ;39(6):445-449 3764 UI - 13960 AU - Murillo-Amador B AU - Troyo-Dieguez E AU - Lopez-Cortes A AU - Jones HG AU - yala-Chairez F AU - Tinoco-Ojanguren CL AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja California, MexicoUniv Dundee, Dundee DD1 4HN, ScotlandUniv Autonoma Sonora, Hermosillo, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Hermosillo, Sonora, MexicoMurillo-Amador, B, Ctr Invest Biol Noroeste, SC Apdo Postal 128, La Paz 23000, Baja California, Mexico TI - Salt tolerance of cowpea genotypes in the emergence stage AB - The effect of NaCl salinity (0, 85 and 170 mmol/L) during emergence of 25 genotypes of cowpea [Vigna unguiculata (L.) Walp.] was studied under growth chamber conditions. Seed emergence percentage and rate, root:shoot ratio, and biomass per plant were affected by genotype, salinity and genotype x salinity interaction; this interaction showed that salinity effects differed among genotypes. The criterion used to classify genotypes with respect to their salt tolerance was based on their germination percentages in both 85 and 170 mmol NaCl/L. One genotype was grouped into class 'A' (CB27) which had the highest salt tolerance at emergence, and was classified as salt tolerant. Another group consisting of Paceno, CB88, CB3, CB5, Tardon, Cuarenteno and CB46 was placed into class 'B'; these genotypes showed total emergence percentages up to 75% in both 85 and 170 mmol NaCl/L. A third group of genotypes was placed into class 'C' which had the lowest emergence percentages in both 85 and 170 mmol NaCl/L. It was confirmed that salinity treatments affect the emergence of cowpea, delaying both emergence percentage and rate. We conclude that selection and classification for salt tolerance in cowpea genotypes can be successfully undertaken at early seedling stages, because the same genotypes were classified similarly during the germination stage in previous research MH - Mexico|Baja California MH - Mexico|Sonora MH - United Kingdom PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0816-1089 UR - ISI:000168010800010 L2 - Vigna unguiculata;screening;root : shoot dry weight ratio;root : shoot length ratio;emergence percentage;emergence rate;GROWTH SO - Australian Journal of Experimental Agriculture 2001 ;41(1):81-88 3765 UI - 12366 AU - Murillo-Rodriguez E AU - Giordano M AU - Cabeza R AU - Henriksen SJ AU - Diaz MM AU - Navarro L AU - Prospero-Garcia O AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Neurobiol, Mexico City 04510, DF, MexicoUniv Texas, Dept Biol Sci, El Paso, TX 79968, USAScripps Res Inst, Dept Neuropharmacol, La Jolla, CA, USAProspero-Garcia, O, Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, A Postal 70-250, Mexico City 04510, DF, Mexico TI - Oleamide modulates memory in rats AB - Oleamide is a recently described lipid, obtained from the cerebrospinal fluid of sleep-deprived cats. It has been observed that oleamide possesses several biological effects, such as sleep induction, and immunological suppression as well as serotonin and gamma-aminobutyric acid receptors activation. In addition, oleamide also binds to the cannabinoid receptors. In this study, we have observed that oleamide facilitates memory extinction in a passive avoidance paradigm, reduces core temperature and pain perception, but does not affect significantly locomotion. These results suggest that oleamide modulates memory processes. However, we do not know if oleamide impairs the retrieval of the memory associated to the 'not go' behavior, or facilitates the fast re-learning of the 'go' behavior. In addition, since these effects are also induced by marijuana and anandamide, it is very likely that oleamide may be affecting the cerebral cannabinold system to induce its effects. (C) 2001 Published by Elsevier Science Ireland Ltd MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 13 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000172059000016 L2 - cannabinoids;lipids;gamma-aminobutyric acid;serotonin;passive avoidance;SLEEP INDUCTION; ANANDAMIDE; 5-HT1A; BRAIN SO - Neuroscience Letters 2001 ;313(1-2):61-64 3766 UI - 13304 AU - Murillo-Rodriguez E AU - Cabeza R AU - Mendez-Diaz M AU - Navarro L AU - Prospero-Garcia O AD - Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Mexico City 04510, DF, MexicoUniv Texas, Dept Biol Sci, El Paso, TX 79968, USAProspero-Garcia, O, Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Apdo Postal 70-250, Mexico City 04510, DF, Mexico TI - Anandamide-induced sleep is blocked by SR141716A, a CB1 receptor antagonist and by U73122, a phospholipase C inhibitor AB - Anandamide (ANA) alters sleep by increasing the amount of time spent in slow wave sleep 2 (SWS2) and rapid eye movement sleep (REMS) at the expense of wakefulness (W) in rats. In this report, we describe a similar effect of ANA when injected itracerebroventricularly (i.c.v.) or into the peduriculo-pontine tegmental nucleus (PPTg) and the lack of an effect when ANA is administered into the medial preoptic area (MPOA). Furthermore, the i.c.v. or PPTg administration of SR141716A, a CB1 antagonist, or U73122, a PLC inhibitor, 15 min prior to ANA, readily prevents the ANA induced changes in sleep. The present results suggest that a cannabinoid system in the PPTg may be involved in sleep regulation and that the cannabinoid effect is mediated by the CB1 receptor coupled to a PLC second messenger system. NeuroReport 12:2 131-2136 (C) 2001 Lippincott Williams & Wilkins MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 19 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000169809200019 L2 - anandamide;cannabinoid;CB1 receptor;phospholipase C;rapid eye movement sleep;CANNABINOID RECEPTOR; BRAIN; RAT; ENDOCANNABINOIDS; MEMORY; SYSTEM; BINDS SO - Neuroreport 2001 ;12(10):2131-2136 3767 UI - 12883 AU - Murphy AP AU - Moody CD AU - Riley RL AU - Lin SW AU - Murugaverl B AU - Rusin P AD - US Bur Reclamat, Reclamat Serv Ctr, Lakewood, CO 80225, USAInst Technol, Tijuana, Baja California, MexicoUniv Denver, Dept Chem & Biochem, Denver, CO 80208, USAUniv Arizona, Dept Vet Sci & Microbiol, Tucson, AZ 85721, USAMurphy, AP, US Bur Reclamat, Reclamat Serv Ctr, POB 25007,Bldg 67, Lakewood, CO 80225 USA TI - Microbiological damage of cellulose acetate RO membranes AB - Based on the data presented in this study, microorganisms can degrade wet cellulose acetate (CA) reverse osmosis (RO) membranes during shutdown periods or under storage conditions. Fungal (and perhaps bacterial) metabolism of the membranes was measured from CA membranes using the C-14 isotope. Using uniformly labeled C-14 cellulose as the starting compound, CA polymer was synthesized, casting solutions were made, and CA membranes were produced. After inoculating membrane samples with the microorganisms, the metabolism of the membranes was confirmed by measuring isotopically enriched carbon dioxide gas produced either by the respiration under aerobic or anaerobic conditions using the Krebs metabolic cycle or by fermentation. Results show that the dense zone of the asymmetric membrane, where desalting occurs, could be compromised in 3 months or less. Membrane samples that were treated by sanding and hydrolyzing the surface to simulate a "used" membrane, degraded at a faster rate than new membranes, Removing oxygen from the system failed to slow or stop the rate of growth. Data showed that no "special" fungus from the RO industry is unique in degrading CA membrane. Instead, all organisms tested degraded these membranes, including microorganisms found in the biofilms from a field RO system and microorganisms present as laboratory contaminates. (C) 2001 Published by Elsevier Science B.V MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0376-7388 UR - ISI:000170958300009 L2 - cellulose acetate;reverse osmosis;isotopes SO - Journal of Membrane Science 2001 ;193(1):111-121 3768 UI - 13711 AU - Murphy JB AU - Keppie JD AU - Stacey J AU - Trainor R AD - St Francis Xavier Univ, Dept Geol, Antigonish, NS B2G 2W5, CanadaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoMurphy, JB, St Francis Xavier Univ, Dept Geol, POB 5000, Antigonish, NS B2G 2W5, Canada TI - Deciphering the Neoproterozoic history of the Hollow Fault, Avalon terrane, mainland Nova Scotia AB - Recognition and deciphering of the early history of fault zones is difficult because younger fabrics commonly overprint and obscure older ones. The Hollow-Greendale Fault system in the Avalon terrane of the northern Antigonish Highlands in mainland Nova Scotia has suffered many episodes of motion in the Paleozoic during development of the Appalachian orogen. Field relationship and petrographic observations indicate that its Neoproterozoic history is preserved as ca. 610 Ma NE- and NW-trending ductile shear zones within the Georgeville Group contact aureole of the intrusive syn- to late-tectonic Greendale Complex. Kinematic indicators within the NE-trending shear zone along the southwestern contact indicate dextral shear and are compatible with dextral shear indicators within the Greendale Complex and with the orientation of coeval regional F-1 fold structures within the Antigonish Highlands. The NW-trending shear zone along the northeastern contact represents either a step-over fault a within a dextral shear zone or a zone of localized transpression associated with the emplacement of the Greendale Complex. Local preservation of Neoproterozoic shear zone fabrics within the Georgeville Group host rocks is attributed to the shielding effects of the proximal Greendale Complex, which acted as a rigid unit during Paleozoic deformation so that subsequent motion along the Hollow Fault was partitioned along the northeastern and southwestern contact of the complex. The Neoproterozoic history combined with paleocontinental reconstructions, indicates that the Hollow-Greendale fault system was part of an important regional strike-slip fault zone within a volcanic are regime along the periphery of Gondwana (Murphy et al., 1999a,b). (C) 2001 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0191-8141 UR - ISI:000168590500020 L2 - CANADIAN APPALACHIANS; NEWFOUNDLAND APPALACHIANS; TECTONIC IMPLICATIONS; ANTIGONISH HIGHLANDS; COMPOSITE TERRANE; DEFORMATION; EVOLUTION; NORTHERN; MARGIN; OROGEN SO - Journal of Structural Geology 2001 ;23(6-7):1067-1077 3769 UI - 13650 AU - Murray C AU - Frenk J AD - WHO, CH-1211 Geneva 27, SwitzerlandGovt Mexico, Minist Hlth, Mexico City, DF, MexicoMurray, C, WHO, 20 Ave Appia, CH-1211 Geneva 27, Switzerland TI - World Health Report 2000: a step towards evidence-based health policy MH - Mexico|Distrito Federal MH - Switzerland PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 17 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000168901600035 L2 - SYSTEMS; NATIONS; COST SO - Lancet 2001 ;357(9269):1698-1700 3770 UI - 12190 AU - Mustafa T AU - Bjune G AU - Jonsson R AU - Pando RH AU - Nilsen R AD - Univ Bergen, Ctr Int Hlth, N-5021 Bergen, NorwayUniv Bergen, Dept Odontol, N-5021 Bergen, NorwayUniv Bergen, Broegelmann Res Lab, N-5021 Bergen, NorwayUniv Oslo, Dept Int Hlth, N-0317 Oslo, NorwayInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoArmauer Hansen Res Inst, Addis Ababa, EthiopiaMustafa, T, Haukeland Univ Hosp, Ctr Int Hlth, Armauer Hansen Bldg, N-5021 Bergen, Norway TI - Increased expression of Fas ligand in human tuberculosis and leprosy lesions: a potential novel mechanism of immune evasion in mycobacterial infection AB - To study the location and mechanism of apoptosis within the human tuberculosis (TB) and leprosy lesions, parallel sections were analyzed for mycobacterial antigens (M.Ag), Fas ligand (FasL), Fas, CD68 and Mac387 by immunohistochemistry, and apoptotic cells by the terminal deoxynucleotidyl-transferase-mediated dUTP-digoxigenin nick end labelling method. Cutaneous leishmaniasis and foreign body granulomas were analyzed for comparison. The heavily infected macrophages in multibacillary TB and leprosy granulomas very strongly expressed FasL, indicating that a mycobacterial infection can induce an increased expression of FasL in a population of infected macrophages, which may protect them from the attack of Fas-expressing lymphocytes. However, macrophages with high levels of leishmania amastigotes did not selectively express FasL, suggesting that this phenomenon is specific for the mycobacteria. Interestingly, in the well-formed TB granulomas, 84% of the multinucleated giant cells strongly expressed FasL. The expression of Fas was weak (34%) or absent. A higher number (33%) of epithelioid cells expressed FasL than Fas (23%). Lymphocytes were scanty among the epithelioid cells. The frequency of apoptotic cells was higher in the epithelioid cells (0.25%) than the mononuclear cells in the mantle zone (0.14%). Thus, the epithelioid cells and the multinucleated giant cells by virtue of the increased expression of FasL may make these granulomas an immune privileged site for mycobacteria MH - Ethiopia MH - Mexico|Distrito Federal MH - Norway PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Immunology U5 - J;Article AV - English IS - 0300-9475 UR - ISI:000172692600012 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; T-CELL APOPTOSIS; HUMAN MACROPHAGES; IN-SITU; DOWN-REGULATION; UP-REGULATION; CD95 LIGAND; DEATH; LYMPHOCYTES; ACTIVATION SO - Scandinavian Journal of Immunology 2001 ;54(6):630-639 3771 UI - 13247 AU - Mvondo DN AU - Navarro-Gonzalez R AU - Mckay CP AU - Coll P AU - Raulin F AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, Mexico. Univ Paris 12, Lab Interuniv Syst Atmospher, F-94010 Creteil, France. Univ Paris 07, F-94010 Creteil, France. NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035, USA TI - Production of nitrogen oxides by lightning and coronae discharges in simulated early earth, venus and mars environments AB - We present measurements for the production of nitrogen oxides (NO and N2O) in CO2-N-2 mixtures that simulate different stages of the evolution of the atmospheres of the Earth, Venus and Mars. The nitrogen fixation rates by two different types of electrical discharges, namely lightning and coronae, were studied over a wide range in CO2 and N-2 mixing ratios. Nitric oxide (NO) is formed with a maximum energy yield estimated to be similar to1.3x10(16) molecule J(-1) at 80% CO2 and similar to1.3x10(14) molecule J(-1) at 50% CO2 for lightning and coronae discharges, respectively. Nitrous oxide (N2O) is only formed by coronae discharge with a maximum energy yield estimated to be similar to1.2x10(13) molecule J(-1) at 50% CO2. The pronounced difference in NO production in lightning and coronae discharges and the lack of formation of N2O in lightning indicate that the physics and chemistry involved in nitrogen fixation differs substantially in these two forms of electric energy. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - USA T3 - SPACE LIFE SCIENCES: LIFE IN THE SOLAR SYSTEM: PREBIOTIC CHEMISTRYAdvances in space research PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticle2SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSADV SPACE RESBS43Z AV - English IS - 0273-1177 UR - ISI:000169859700006 SO - 2001 ;(2):217-223 3772 UI - 13330 AU - Myartseva SN AU - Ruiz-Cancino E AD - Univ Autonoma Tamaulipas, Ctr Invest, UAMAC, Cd Victoria 87149, Tamaulipas, MexicoMinist Nat Use & Environm Protect Turkmenistan, Natl Inst Deserts Flora & Fauna, Ashgabat 744000, TurkmenistanMyartseva, SN, Univ Autonoma Tamaulipas, Ctr Invest, UAMAC, Cd Victoria 87149, Tamaulipas, Mexico TI - Mexican species of parasitoid wasps of the genus Marietta (Hymenoptera : Aphelinidae) AB - A key to females and notes on 5 species of the Mexican fauna of the genus Marietta are given. Marietta montana n. sp, from the Biosphere Reserve "El Cielo", State of Tamaulipas, Mexico, is described and illustrated MH - Mexico|Tamaulipas MH - Turkmenistan PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000169794700020 L2 - Marietta n. sp.;Tamaulipas;Mexico SO - Florida Entomologist 2001 ;84(2):293-297 3773 UI - 13418 AU - Nachamkin I AU - Engberg J AU - Gutacker M AU - Meinersman RJ AU - Li CY AU - Arzate P AU - Teeple E AU - Fussin V AU - Ho TW AU - Asbury AK AU - Griffin JW AU - McKhann GM AU - Piffaretti JC AD - Univ Penn, Dept Pathol & Lab Med, Sch Med, Philadelphia, PA 19104, USAUniv Penn, Dept Neurol, Sch Med, Philadelphia, PA 19104, USAARS, USDA, Athens, GA, USAJohns Hopkins Univ, Sch Med, Dept Neurol, Baltimore, MD 21205, USAState Serum Inst, Dept Gastrointestinal Infect, Div Diagnost, Copenhagen, DenmarkIst Cantonale Batteriol, Lugano, SwitzerlandHebei Med Sch, Affiliated Teaching Hosp 2, Shijiazhuang, Peoples R ChinaInst Nacl Pediat, Lab Bacteriol Div Saditra, Mexico City, DF, MexicoNachamkin, I, Univ Penn, Dept Pathol & Lab Med, Sch Med, 4th Fl,Gates Bldg,3400 Spruce St, Philadelphia, PA 19104 USA TI - Molecular population genetic analysis of Campylobacter jejuni HS : 19 associated with Guillain-Barre syndrome and gastroenteritis AB - Infection with Campylobacter jejuni serotype HS:19 is associated with the development of Guillain-Barre' syndrome (GBS). To determine whether a particular HS: 19 clone is associated with GBS, multilocus enzyme electrophoresis (MLEE) was used to analyze a worldwide collection of isolates. There were 34 electropherotypes (ETs) in 3 phylogenetic clusters among 83 C. jejuni isolates. Cluster I contained all HS: 19 strains, and a single ET (ET4) accounted for most HS: 19 strains. HS: 19 strains did not occur in any of the other clusters. ET4 contained isolates from different geographic locations, indicating global spread of this clone. Furthermore, ET4 contained isolates from patients with uncomplicated enteritis and GBS, as well as isolates from animal sources. The results of this study show that HS: 19 strains comprise a clonal, although not monomorphic, population, which is distinct from non-HS: 19 strains within C. jejuni. A unique clone associated with GBS was not identified by use of MLEE MH - Denmark MH - Mexico|Distrito Federal MH - USA MH - Peoples R China MH - Switzerland PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 29 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000169554500017 L2 - STRAINS; SEROTYPE SO - Journal of Infectious Diseases 2001 ;184(2):221-226 3774 UI - 14206 AU - Nachit MM AU - Elouafi I AU - Pagnotta MA AU - El Saleh A AU - Iacono E AU - Labhilili M AU - Asbati A AU - Azrak M AU - Hazzam H AU - Benscher D AU - Khairallah M AU - Ribaut JM AU - Tanzarella OA AU - Porceddu E AU - Sorrells ME AD - ICARDA, CIMMYT, Durum Improvement Program, Aleppo, SyriaUniv Tuscia, Dipartimento Agrobiol & Agrochim, I-01100 Viterbo, ItalyCIMMYT, Appl Biotechnol Ctr, Mexico City 06600, DF, MexicoCornell Univ, Dept Plant Breeding, Ithaca, NY 14853, USANachit, MM, ICARDA, CIMMYT, Durum Improvement Program, POB 5466, Aleppo, Syria TI - Molecular linkage map for an intraspecific recombinant inbred population of durum wheat (Triticum turgidum L. var. durum) AB - Durum wheat (Triticum turgidum L, var. durum) is an economically and nutritionally important cereal crop in the Mediterranean region. To further our understanding of durum genome organization we constructed a durum linkage map using restriction fragment length polymorphisms (RFLPs), simple sequence repeats (SSRs) known as Gatersleben wheat microsatellites (GWMs), amplified fragment length polymorphisms (AFLPs), and seed storage proteins (SSPs: gliadins and glutenins). A population of 110 F-9 recombinant inbred lines (RILs) was derived from an intraspecific cross between two durum cultivars, Jennah Khetifa and Cham 1. The two parents exhibit contrasting traits for resistance to biotic and abiotic stresses and for grain quality. In total, 306 markers have been placed on the linkage map 138 RFLPs, 26 SSRs, 134 AFLPs, five SSPs, and three known genes tone pyruvate decarboxylase and two lipoxygenases). The map is 3598 cM long, with an average distance between markers of 11.8 cM, and 12.1% of the markers deviated significantly from the expected Mendelian ratio 1:1. The molecular markers were evenly distributed between the A and B genomes. The chromosome with the most markers is 1B (41 markers), followed by 3B and 7B, with 25 markers each. The chromosomes with the fewest markers are 2A (11 markers), 5A (12 markers), and 4B (15 markers). In general, there is a good agreement between the map obtained and the Triticeae linkage consensus maps. This intraspecific map provides a useful tool for marker-assisted selection and map-based breeding for resistance to biotic and abiotic stresses and for improvement of grain quality MH - Italy MH - Mexico|Distrito Federal MH - Syria MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 26 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000167232800001 L2 - durum;RFLP;SSR;AFLP;seed storage proteins;genetic linkage mapping;GENETIC-LINKAGE; HOMOEOLOGOUS GROUP-2; HORDEUM-VULGARE; HEXAPLOID WHEAT; BREAD WHEAT; D-GENOME; CHROMOSOMES; BARLEY; RICE; CONSTRUCTION SO - Theoretical and Applied Genetics 2001 ;102(2-3):177-186 3775 UI - 14371 AU - Naeher LP AU - Smith KR AU - Leaderer BP AU - Neufeld L AU - Mage DT AD - Yale Univ, Sch Med, Dept Epidemiol & Publ Hlth, New Haven, CT 06520, USAUniv Calif Berkeley, Ctr Environm & Occupat Hlth, Berkeley, CA 94720, USANatl Inst Publ Hlth, Div Nutr, Cuernavaca 62508, Morelos, MexicoTemple Univ, Inst Survey Res, Philadelphia, PA 19122, USANaeher, LP, Ctr Dis Control & Prevent, Natl Ctr Environm Hlth, 1600 Clifton Rd,NE MS E23, Atlanta, GA 30333 USA TI - Carbon monoxide as a tracer for assessing exposures to particulate matter in wood and gas cookstove households of highland Guatemala AB - Kitchen-area 22-h gravimetric PM2.5 and passive diffusion stain-tube carbon monoxide (CO) concentrations were measured in homes with open fire and improved wood cookstoves in two studies. In the first study (Guat-2), which also studied homes with gas cookstoves, three samples were collected per stove condition from each of three test houses. In the second study (Guat-3), one sample was collected per house from 15 open fire and 25 improved-stove houses. CO personal samples were also taken for mother and child in both studies. Spearman correlation coefficients (R) between kitchen-area CO and PM2.5 levels in homes using open fires or impoved wood cookstoves were high ranging from 0.92 (Guat-2) to 0.94 (Guat-3), as were those between the personal samples for mother and child ranging from 0.85 (Guat-3) to 0.96 (Guat-2). In general, the correlations were lower for less-polluted conditions. The study found that CO is a good proxy for PM2.5 in homes using open fires or planchas (improved wood cookstove with chimney) but not under gas stove use conditions. It also determined that mother personal CO is a good proxy for child's (under 2 years of age) personal CO and that area CO measurements are not strongly representative of personal CO measurements. These results generally support the use of Draeger CO passive diffusion tubes as a proxy for PM2.5 in such cases where a single type of emission source is the predominant source for CO and PM2.5 MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0013-936X UR - ISI:000166727700032 L2 - AIR-POLLUTION; DEVELOPING-COUNTRIES; FUEL COMBUSTION; EMISSIONS; HEALTH SO - Environmental Science & Technology 2001 ;35(3):575-581 3776 UI - 13049 AU - Nair PK AU - Daza OG AU - Readigos AAC AU - Campos J AU - Nair MTS AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Dept Solar Energy Mat, Temixco 62580, Morelos, MexicoUniv Havana, Fac Chem, Dept Inorgan Chem, Havana, CubaNair, PK, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Dept Solar Energy Mat, Temixco 62580, Morelos, Mexico TI - Formation of conductive CdO layer on CdS thin films during air heating AB - A thin layer of CdO is formed on a chemically deposited CdS thin film through reaction with atmospheric oxygen during heating in air for 5-240 min at 370-500 degreesC. The sheet resistance of the film drops from about 10(13) Omega -3.5 k Omega (370 degreesC) and 470 Omega (500 degreesC). From optical transmittance and reflectance spectra, the thickness of the CdO layer was found to be about 10 nm; the crystalline grain size is 12-25 nm, depending on the temperature and duration of heating, and the estimated electrical resistivity is 10(-4)-10(-3) Omega cm. The optical bandgap of the CdS-CdO layer is effectively that of the underlying CdS thin film. about 2.45 eV in the annealed film. The CdS, which remains under the conductive CdO top layer, is photosensitive, with a photo-to-dark current ratio of 10(3) and crystalline grain diameter of about 10 nm in the case of a film heated at 500 degreesC for 5 min. These results are discussed in the context of window layers in solar cells MH - Cuba MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000170465700005 L2 - CHEMICAL BATH DEPOSITION; CELL SO - Semiconductor Science and Technology 2001 ;16(8):651-656 3777 UI - 13482 AU - Najim K AU - Poznyak AS AU - Gomez E AD - ENSIGC, Proc Control Lab, F-31078 Toulouse, FranceIPN, CINVESTAV, Secc Control Automat, Mexico City 07300, DF, MexicoLa Salle Univ, Lab Ctr Invest, Mexico City 06140, DF, MexicoNajim, K, ENSIGC, Proc Control Lab, Chemin Loge, F-31078 Toulouse, France TI - Adaptive policy for two finite Markov chains zero-sum stochastic game with unknown transition matrices and average payoffs AB - A two finite Markov chains zero-sum stochastic game with unknown transition matrices and average payoffs is considered. The control objective of participants is the optimization of the limiting average payoff. The behaviour of each players is modelled by a finite controlled Markov chain. A novel adaptive policy based of Lagrange multipliers is developed. We introduce a regularized Lagrange function to guarantee the uniqueness of the corresponding saddle-point (equilibrium point) and a new normalization procedure participating in the adaptive strategy which asymptotically realizes this equilibrium. The saddle-point is shown to be unique. The convergence properties are stated and it is shown that this adaptive control algorithm has the order of convergence of magnitude (n(-1/3)). (C) 2001 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000169252300004 L2 - stochastic game;adaptive control;controlled Markov chains SO - Automatica 2001 ;37(7):1007-1018 3778 UI - 12797 AU - Nannipieri M AU - Posadas R AU - Politi E AU - Williams K AU - Gonzales C AU - Stern MP AU - Ferrannini E AD - Univ Texas, Hlth Sci Ctr, Dept Med, San Antonio, TX 78284, USAUniv Pisa, Dept Internal Med, I-56100 Pisa, ItalyAmer British Cowdray Hosp, Mexico City, DF, Mexico TI - Atrial natriuretic peptide gene polymorphisms and albuminuria: The Mexico City Study MH - Italy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000170706201001 SO - Diabetologia 2001 ;44():A261-A261 3779 UI - 14195 AU - Nava-Camberos U AU - Riley DG AU - Harris MK AD - Coastal Plain Expt Stn, Tifton, GA 31793, USANava-Camberos, U, Campo Expt La Laguna, Apdo Postal 247, Torreon, Coahuila, Mexico TI - Temperature and host plant effects on development, survival, and fecundity of Bemisia argentifolii (Homoptera : Aleyrodidae) AB - Development time and percent survival of the silverleaf whitefly, Bemisia argentifolii Bellows & Perring (formerly referred to as B strain of sweetpotato whitefly), were determined at Eve constant temperatures ranging From 20 to 35 degreesC on two cultivars of cotton, cantaloupe, and pepper (Capsicum sp.). Fecundity was recorded at 30 degreesC during the first 10 d of adulthood. Developmental, suvival. and fecundity rates were not significantly different between cultivars within crops of either cotton or cantaloupe, but varied between crops. Development time from egg to adult at 20-32 degreesC ranged from 14.6 +/- 0.8 (mean +/- SE) to 36.0 +/- 1.0 d on cantaloupe and from 16.3 +/- 0.7 to 37.9 +/- 2.1 d on cotton, respectively. Whiteflies did not develop at 35 degreesC or on pepper at an). temperature. Minimum developmental thresholds and degree-days requirements from egg to adult were 11.1 degreesC and 312.5 DD on cotton and 13.2 degreesC and 250.0 DD on cantaloupe, respectively. Immature survival was high (76.5 +/- 11.5-100%) on cantaloupe, intermediate (37.3 +/- 13.3-64.4 +/- 10.2%) on cotton, and very low (0-8.3 +/- 8.3%) on pepper from 20-32 degreesC. Fecundity ranged from 153.3 +/- 10.8-158.3 +/- 9.3 eggs per female on cantaloupe, from 117.0 +/- 6.0-117.5 +/- 22.1 eggs pet. female on cotton, and from 2.1 +/- 0.7-40.5 +/- 5.8 eggs per female on pepper, at 30 degreesC MH - Mexico|Coahuila MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000167268200010 L2 - Bemisia tabaci;development;survival;fecundity;cantaloupe;cotton;TABACI HOMOPTERA; POPULATION-DYNAMICS; COTTON; LONGEVITY; ISRAEL SO - Environmental Entomology 2001 ;30(1):55-63 3780 UI - 11805 AU - Nava N AU - Morales MA AU - Vanoni W AU - Toledo JA AU - Baggio-Saitovitch E AU - Viveros T AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoCtr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilUniv Autonoma Metropolitana Iztapalapa, Area Ingn Quim, Mexico City 09340, DF, MexicoNava, N, Inst Mexicano Petr, Eje Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Structural Behavior of Pt-Sn supported on MgO AB - Pt-Sn supported on magnesia and alumina were characterized, before and after treatment with hydrogen, by Mossbauer spectroscopy and X-ray diffraction. For the calcined samples on both supports tin is present as SnO2 and platinum as metal. After reduction with hydrogen, platinum and tin diffuse into the magnesia lattice to form a solid solution. On alumina Sn(IV), Sn(II), Sn(0), Pt, Pt3Sn, PtSn and PtSn2 alloys are formed. The SnO interacts strongly with the alumina support. The catalytic activity of both Pt-Sn catalysts is strongly affected by the support. On alumina the dehydrogenation of cyclohexane is very high, whereas that on magnesia is almost non-active MH - Brazil MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical;Physics, Condensed Matter;Physics, Nuclear U5 - J;Article AV - English IS - 0304-3843 UR - ISI:000173872000008 L2 - Mossbauer spectroscopy;X-ray diffraction;TIN CATALYSTS; DEHYDROGENATION; ISOBUTANE; CARBON SO - Hyperfine Interactions 2001 ;134(1-4):81-92 3781 UI - 13903 AU - Navarrete M AU - Gaudry A AU - Revel G AU - Martinez T AU - Cabrera L AD - Natl Univ Mexico, Inorgan & Nucl Chem Dept, Fac Chem, Mexico City, DF, MexicoCtr Etud Saclay, Lab Pierre Sue, F-91191 Gif Sur Yvette, FranceNavarrete, M, Natl Univ Mexico, Inorgan & Nucl Chem Dept, Fac Chem, Mexico City, DF, Mexico TI - Urinary selenium excretion in patients with cervical uterine cancer AB - In this work, we report on a relationship between urinary selenium and the development of cervical uterine cancer. A simple chemical method was developed to concentrate trace amounts of selenium from relatively large urine samples by use of small activated carbon filters. When these filters are irradiated with thermal neutrons, selenium can be determined either by Se-77m (t(1/2) = 17.5 s) or Se-75 (t(1/2) = 120 d) In this article, we report the results for 82 urine samples from women with cervical uterine cancer in several stages of development and from healthy controls. These results show a statistically significant increase of selenium excretion in cancer patients as compared to controls. Urinary selenium excretion is highest for patients in the intermediate stages of the disease MH - France MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0163-4984 UR - ISI:000168154900001 L2 - cervical uterine cancer;selenium;urine;activation analysis;ACTIVATION-ANALYSIS SO - Biological Trace Element Research 2001 ;79(2):97-105 3782 UI - 14460 AU - Navarro-Garcia F AU - Canizalez-Roman A AU - Luna J AU - Sears C AU - Nataro JP AD - IPN, CINVESTAV, Dept Cell Biol, Mexico City 07000, DF, MexicoIPN, CINVESTAV, Dept Physiol, Mexico City 07000, DF, MexicoIPN, CINVESTAV, Dept Biophys, Mexico City 07000, DF, MexicoIPN, CINVESTAV, Dept Neurosci, Mexico City 07000, DF, MexicoJohns Hopkins Univ, Sch Med, Div Infect Dis, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Div Gastroenterol, Baltimore, MD 21205, USAUniv Maryland, Sch Med, Dept Pediat, Ctr Vaccine Dev, Baltimore, MD 21201, USANavarro-Garcia, F, IPN, CINVESTAV, Dept Cell Biol, Ap Postal 14-740, Mexico City 07000, DF, Mexico TI - Plasmid-encoded toxin of enteroaggregative Escherichia coli is internalized by epithelial cells AB - We have previously described a 104-kDa protein termed Pet (for plasmid-encoded toxin) secreted by some strains of enteroaggregative Escherichia coli (EAEC), Through an unknown mechanism, this toxin (i) raises transepithelial short-circuit current (Isc) and decreases the electrical resistance of rat jejunum mounted in the Ussing chamber, (ii) causes cytoskeletal alterations in HEp-2 cells and HT29/C1 cells, and (iii) is required for histopathologic effects of EAEC on human intestinal mucosa, Pet is a member of the autotransporter class of secreted proteins and together with Tsh, EspP, EspC, ShMu, and SepA proteins comprises the SPATE subfamily, Here, we show that Pet is internalized by HEp-2 cells and that internalization appears to be required for the induction of cytopathic effects. Evidence supporting Pet internalization includes the facts that (i) the effects of Pet on epithelial cells were inhibited by brefeldin A,which interferes with various steps of intracellular vesicular transport; (ii) immunoblots using anti-Pet antibodies detected Pet in the cytoplasmic fraction of intoxicated HEp-2 cells; (iii) Pet was detected inside HEp-2 cells by confocal microscopy; and (iv) a mutant in the passenger domain cleavage site, which prevents Pet release from the bacterial outer membrane, did not produce cytopathic effects on epithelial cells, whereas the release of mutant Pet from the outer membrane with trypsin yielded active toxin, We have also shown that the Pet serine protease motif is required to produce cytopathic effects but not for Pet secretion. Our results suggest an intracellular mode of action for the Pet protease and are consistent with we our recent report suggesting an intracellular mode of action for Pet IJ. M. Villascca, F, Navarro-Garcia, G, Mendoza-Hernandez, J. P. Nataro, A. Cravioto, and C. Eslava, Infect. Immun, 68:5920-5927, 2000) MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 21 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000166528700054 L2 - PERSISTENT DIARRHEA; CHOLERA-TOXIN; BREFELDIN-A; RETROGRADE TRANSPORT; ENTEROTOXIN; CHILDREN; PROTEINS; ENTRY; PET SO - Infection and Immunity 2001 ;69(2):1053-1060 3783 UI - 12671 AU - Navarro-Gonzalez R AU - Villagran-Muniz M AU - Sobral H AU - Molina LT AU - Molina MJ AD - Univ Nacl Autonoma Mexico, Lab Quim Plasmas & Estudios Planetarios, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoMIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139, USANavarro-Gonzalez, R, Univ Nacl Autonoma Mexico, Lab Quim Plasmas & Estudios Planetarios, Inst Ciencias Nucl, Circuito Exterior,Ciudad Univ,Apartado Postal 70-, Mexico City 04510, DF, Mexico TI - The physical mechanism of nitric oxide formation in simulated lightning AB - We report an experimental assessment of the contributions of the shockwave and the hot channel to the production of nitric oxide by simulated lightning. Lightning in the laboratory was simulated by a hot plasma generated with a pulsed Nd-YAG laser. The temporal evolution of electric breakdown in air at atmospheric pressure was studied from the nanosecond to the millisecond time scale by shadowgraphy and interferometry techniques. The shockwave front velocity was determined to be about 60 km s(-1) at 20 ns and the temperature behind the shock front was estimated to be about 10(5) K. The production yield of nitric oxide by shock heating is estimated to be: P(NO) (3 +/- 2) x 10(14) molecule J(-1). In contrast it was calculated that the production yield of NO by the hot channel is as much as P(NO) = (1.5 +/- 0.5) X 10(17) molecule J(-1). To the extent our simulation is an accurate representation of natural lightning, the hot channel is the dominant region for nitrogen fixation MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 14 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000171588000011 L2 - LASER-INDUCED BREAKDOWN; NITROGEN-FIXATION; DISCHARGES; ENERGY; AIR SO - Geophysical Research Letters 2001 ;28(20):3867-3870 3784 UI - 13249 AU - Navarro-Gonzalez R AU - Ramirez SI AU - de la Rosa JG AU - Coll P AU - Raulin F AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, Mexico. Univ Paris 07, Lab Interuniv Syst Atmospher, F-94010 Creteil, France. Univ Paris 12, F-94010 Creteil, France TI - Production of hydrocarbons and nitriles by electrical processes in Titan's atmosphere AB - Although lightning has not been observed in Titan's atmosphere, the presence of methane rain in the troposphere suggests the possibility of electrical activity in the form of corona and/or lightning discharges. Here we examine the chemical effects of these electrical processes on a Titan simulated atmosphere composed of CH4 in N-2 at various mixing ratios. Corona discharges were simulated in two different experimental arrays. For the detection of reactive intermediates we used a mass spectrometer to study the main positive ions arising by bombarding low-energy electrons from a hot filament into low-pressure methane, The final stable products, generated by applying a high voltage in a coaxial reactor with either positive or negative polarity, were separated and detected by gas chromatography-Fourier transform infrared spectroscopy and electron impact mass spectrometry (GC-FTIR-MS). Lightning discharges were simulated by a hot and dense plasma generated by a Nd-YAC laser and the final products were separated and detected by GC-FTIR-MS. Corona discharges produce linear and branched hydrocarbons as well as nitriles whereas lightning discharges generate mainly unsaturated hydrocarbons and nitriles. Lightning discharges are about 2 orders of magnitude more efficient in product formation than corona discharges. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal T3 - SPACE LIFE SCIENCES: LIFE IN THE SOLAR SYSTEM: PREBIOTIC CHEMISTRYAdvances in space research PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticle7SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSADV SPACE RESBS43Z AV - English IS - 0273-1177 UR - ISI:000169859700013 SO - 2001 ;(2):271-282 3785 UI - 13406 AU - Navarro-Gonzalez R AU - Mckay CP AU - Mvondo DN AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estud Planetarios, Mexico City 04510, DF, MexicoNASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035, USANavarro-Gonzalez, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estud Planetarios, Circuito Exterior,Ciudad Univ,Apartado Postal 70-, Mexico City 04510, DF, Mexico TI - A possible nitrogen crisis for Archaean life due to reduced nitrogen fixation by lightning AB - Nitrogen is an essential element for life and is often the limiting nutrient for terrestrial ecosystems(1,2). As most nitrogen is locked in the kinetically stable form(3), N-2, in the Earth's atmosphere, processes that can fix N-2 into biologically available forms-such as nitrate and ammonia-control the supply of nitrogen for organisms. On the early Earth, nitrogen is thought to have been fixed abiotically, as nitric oxide formed during lightning discharge(4-6). The advent of biological nitrogen fixation suggests that at some point the demand for fixed nitrogen exceeded the supply from abiotic sources, but the timing and causes of the onset of biological nitrogen fixation remain unclear(7-11). Here we report an experimental simulation of nitrogen fixation by lightning over a range of Hadean (4.5-3.8 Gyr ago) and Archaean (3.8-2.5 Gyr ago) atmospheric compositions, from predominantly carbon dioxide to predominantly dinitrogen (but always without oxygen). We infer that, as atmospheric CO2 decreased over the Archaean period, the production of nitric oxide from lightning discharge decreased by two orders of magnitude until about 2.2 Gyr. After this time, the rise in oxygen (or methane) concentrations probably initiated other abiotic sources of nitrogen. Although the temporary reduction in nitric oxide production may have lasted for only 100 Myr or less, this was potentially long enough to cause an ecological crisis that triggered the development of biological nitrogen fixation MH - Mexico|Distrito Federal MH - USA PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 42 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000169644900041 L2 - EARTHS EARLY ATMOSPHERE; NITRIC-OXIDE; EVOLUTION; CARBON; ENERGY; OXYGEN SO - Nature 2001 ;412(6842):61-64 3786 UI - 10722 AU - Navarro AG AU - Peterson AT AU - Lopez-Medrano E AU - itez-Diaz H AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USANavarro, AG, Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Apartado Postal 70-399, Mexico City 04510, DF, Mexico TI - Species limits in mesoamerican Aulacorhynchus toucanets AB - We examined geographic patterns of variation and differentiation in morphological characters of the emerald toucanets (Aulacorhynchus spp.) of Mesoamerica. Bill lengths showed flat frequency distributions, suggesting that no "adult" size is reached, and raising the possibility that bill growth in toucanets may be indeterminate. Sparse lowland populations in the Peten region are of uniformly small body size, suggesting that they may consist of subadult individuals. Patterns of variation support recognition of four species in Mesoamerica: A. wagleri in western Mexico, A. prasinus in eastern Mexico and northern Central America, A. caeruleogularis in Costa Rica and western Panama, and A. cognatus in eastern Panama, as well as several additional forms (A. lautus, A. albivitta, and A. nigrogularis) in South America MH - Mexico|Distrito Federal MH - USA PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000176696700001 L2 - GEOGRAPHIC-VARIATION SO - Wilson Bulletin 2001 ;113(4):363-372 3787 UI - 12359 AU - Navarro O AU - Espinosa JE AU - Suarez JR AU - Avignon M AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoBUAP, Fac Cs Fis Mat, Posgrada Optoelect, Puebla 72570, MexicoCNRS, LEPES, F-38042 Grenoble, FranceNavarro, O, Univ Nacl Autonoma Mexico, Inst Invest Mat, AP 70-360, Mexico City 04510, DF, Mexico TI - The generalized Hubbard model: a solution for the binding of three particles in a linear chain AB - The binding problem is studied within the generalized Hubbard Hamiltonian by using a real-space method. This method is an extension of the previously proposed mapping method for the simple Hubbard model in order to include the bond-charge interaction term. The generalization of the method is based on mapping the correlated many-body problem onto an equivalent site- and bond-impurity tight-binding one in a higher dimensional space, where the problem can be solved exactly. The three particles correlation in a linear chain has been analyzed by calculating the binding energy using different values of the bond-charge, the on-site (U) and the nearest-neighbor (V) interactions. A bound state asymmetry between electrons and holes was found for bond-charge interactions. Also, an analytical solution is obtained for some special values of the hopping parameters and for all kind of interactions in the Hubbard Hamiltonian. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000172155700036 L2 - Hubbard model;three particles bound states;fermions in reduced dimensions;OXYGEN HOLE METAL; SUPERCONDUCTIVITY SO - Physica C 2001 ;364():158-160 3788 UI - 13076 AU - Naze YZ AU - Chu YH AU - Points SD AU - Danforth CW AU - Rosado M AU - Chen CHR AD - Univ Illinois, Dept Astron, Urbana, IL 61801, USAInst Astrophys & Geophys, B-4000 Liege, BelgiumJohns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoNaze, YZ, Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA TI - Interstellar bubbles in two young HII regions AB - Massive stars are expected to produce wind-blown bubbles in the interstellar medium; however, ring nebulae, suggesting the existence of bubbles, are rarely seen around main-sequence O stars. To search for wind-blown bubbles around main-sequence O stars, we have obtained high-resolution Hubble Space Telescope WFPC2 images and high-dispersion echelle spectra of two pristine H II regions, N11B and N180B, in the Large Magellanic Cloud. These H II regions are ionized by OB associations that still contain O3 stars, suggesting that the H II regions are young and have not hosted any supernova explosions. Our observations show that wind-blown bubbles in these H II regions can be detected kinematically, but not morphologically, because their expansion velocities are comparable to or only slightly higher than the isothermal sound velocity in the H II regions. Bubbles are detected around concentrations of massive stars, individual O stars, and even an evolved red supergiant (a fossil bubble). Comparisons between the observed bubble dynamics and model predictions show a large discrepancy (1-2 orders of magnitude) between the stellar wind luminosity derived from bubble observations and models and that derived from observations of stellar winds. The number and distribution of bubbles in N11B differ from those in N180B, which can be explained by the difference in the richness of stellar content between these two H II regions. Most of the bubbles observed in N11B and N180B show a blister structure, indicating that the stars were formed on the surfaces of dense clouds. Numerous small dust clouds, similar to Bok globules or elephant trunks, are detected in these H II regions, and at least one of them hosts on-going star formation MH - Belgium MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000170429300032 L2 - HII regions;ISM : bubbles;ISM : individual (N11B, N180B);ISM : kinematics and dynamics;Magellanic Clouds;LARGE-MAGELLANIC-CLOUD; HUBBLE-SPACE-TELESCOPE; STELLAR CONTENT; N-11; ASSOCIATIONS; CALIBRATION; WFPC2; LINES; LMC SO - Astronomical Journal 2001 ;122(2):921-937 3789 UI - 12326 AU - ndrade-Cetto A AU - Wiedenfeld H AD - UNAM, Fac Ciencias, Dept Biol Celular, Mexico City 04511, DF, MexicoUniv Bonn, Inst Pharmaceut, D-53121 Bonn, GermanyAndrade-Cetto, A, UNAM, Fac Ciencias, Dept Biol Celular, Apartado Postal 70-359, Mexico City 04511, DF, Mexico TI - Hypoglycemic effect of Cecropia obtusifolia on streptozotocin diabetic rats AB - The hypoglycemic effects of water and butanolic extracts prepared from leaves of Cecropia obtusifolia (Cecropiaceae) were examined in streptozotocin induced diabetic rats. A single oral administration of a water extract at doses of 90 and 150 mg/kg and of a butanol extract at doses of 9 and 15 mg/kg significantly (P < 0.05) lowered the plasma glucose levels in diabetic rats after 3 h administration. Glibenclamide was used as reference and showed similar hypoglycemic effect to the tested extracts at a dose of 3 mg/kg. The flavone, isoorientin and 3-caffeoylquinic acid (chlorogenic acid), were isolated as the important constituents of the plant and were identified as the main constituents in both extracts, too. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 42 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000172354700005 L2 - Cecropia obtusifolia;hypoglycemic effect;streptozotocin;diabetes;isoorientin;chlorogenic acid SO - Journal of Ethnopharmacology 2001 ;78(2-3):145-149 3790 UI - 12191 AU - ndrade-Eiroa A AU - mador-Hernandez J AU - Cladera A AU - Estela JM AU - Cerda V AD - Univ Illes Balears, Dept Quim, E-07071 Palma de Mallorca, SpainUniv Coruna, Dept Quim Analit, E-15071 La Coruna, SpainUniv Guanajuato, Inst Invest Cient, Guanajuato 36000, MexicoCerda, V, Univ Illes Balears, Dept Quim, E-07071 Palma de Mallorca, Spain TI - Detection of unexpected species in multicomponent analysis by using residuals obtained in classical least squares AB - The present work aims to investigate the capacity of the CLS (Classical Least Squares) algorithm together with the analysis of residuals to detect unexpected species in multicomponent analysis. It intends to determine if in an unknown multicomponent mixture to be studied there are more compounds than those actually considered in the calibration. The study has been carried out taking as a model the analysis of some polycyclic aromatic hydrocarbons (PAHs) by means of variable angle spectrofluorimetry. Two different methodologies are proposed: the so-called "local" and the "global", the first offering the best results; however, both have proved to be of great utility in the resolution of the problem stated. In fact, "local" methodology has given rise to satisfactory results, up to the point that working with a 99% confidence, only a false positive has appeared (in the case of a mixture of 5 components where BGP is not considered). On the other hand, with the "global" methodology, there were no false positives (which, on the other hand, and in the "local" methodology hardly existed). However, the minimum concentration of an unexpected species which can be detected slightly worsens for COR and IND, from 0.72 mug L-1 and 2.20 mug L-1 in the "local" methodology to 1.20 mug L-1 and 6.40 mug L-1 in the "global" methodology for COR and IND, respectively MH - Mexico|Guanajuato MH - Spain PB - BARCELONA: ELSEVIER INFORMACION PROFESSIONAL, S A RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0212-0569 UR - ISI:000172700400008 L2 - fluorimetry;PAHs;multicomponent analysis;classical least squares;residuals;unexpected species;POLYCYCLIC AROMATIC-HYDROCARBONS; SYNCHRONOUS FLUORESCENCE SPECTROMETRY; MULTIVARIATE CALIBRATION; WATER SAMPLES; RESOLUTION; MIXTURES; PAHS SO - Quimica Analitica 2001 ;20(3):165-171 3791 UI - 14118 AU - Neufeld LM AU - Ramakrishnan U AU - Rivera J AU - Villalpando S AU - Gonzalez-Cossio T AU - Martorell R AD - Natl Inst Publ Hlth, Morelos 62508, MexicoEmory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322, USAMexican Inst Social Secur, Mexico City, DF, Mexico TI - Prevalence of anemia and iron deficiency during pregnancy of women supplemented with iron or iron and multiple micronutrients MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103679 SO - Faseb Journal 2001 ;15(4):A641-A641 3792 UI - 12548 AU - Newburg DS AU - Ruiz-Palacios GM AU - Altaye M AU - Chaturvedi P AU - Guerrero MD AU - Meinzen-Derr JK AU - Pickering LK AU - Morrow AL AD - Waltham & Univ Massachusetts, Sch Med, Shriver Ctr Mental Retardat, Worcester, MA, USAInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoEastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA, USAChildrens Hosp Kings Daughters, Norfolk, VA, USA TI - Innate variation of fucosylated oligosaccharides in human milk is associated with protection against diarrhea in breast-fed infants MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 0959-6658 UR - ISI:000171457800119 SO - Glycobiology 2001 ;11(10):901-901 3793 UI - 12987 AU - Ng K AU - Somanathan R AU - Walsh PJ AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoSan Marcos State Univ, Dept Chem, San Marcos, CA 92096, USASan Diego State Univ, Dept Chem, San Diego, CA 92182, USASomanathan, R, Inst Tecnol Tijuana, Ctr Grad & Invest, Apartado Postal 1166, Tijuana 22000, BC, Mexico TI - Synthesis of homochiral pentadentate sulfonamide-based ligands AB - A two-step synthesis of pentadentate, tetraionic ligands based on sulfonamide, amide, and pyridyl groups is reported. These ligands are easily accessible in good to excellent yield from commercially available materials. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000170631200009 L2 - OXYGEN-ATOM TRANSFER; ENANTIOSELECTIVE EPOXIDATION; ASYMMETRIC EPOXIDATION; MANGANESE COMPLEXES; TETRADENTATE LIGAND; CATALYSTS; OLEFINS; METAL; PORPHYRINS; ALDEHYDES SO - Tetrahedron-Asymmetry 2001 ;12(12):1719-1722 3794 UI - 12443 AU - ngles-Cano E AU - Diaz AD AU - Loyau S AD - Univ Paris 07, INSERM, U460, F-75870 Paris, FranceInst Nacl Cardiol Ignacio Chavez, Dept Hematol, Mexico City, DF, MexicoAngles-Cano, E, Univ Paris 07, INSERM, U460, 16 Rue Henri Huchard,BP 416, F-75870 Paris, France TI - Inhibition of fibrinolysis by lipoprotein(a) AB - A high plasma concentration of lipoprotein Lp(a) is now considered to be a major and independent risk factor for cerebro- and cardiovascular atherothrombosis. The mechanism by which Lp(a) may favour this pathological state may be related to its particular structure, a plasminogen-like glycoprotein, apo(a), that is disulfide linked to the apo B100 of an atherogenic LDL-like particle. Apo(a) exists in several isoforms defined by a variable number of copies of plasminogen-like kringle 4 and single copies of kringle 5 and the catalytic region. At least one of the plasminogen-like kringle 4 copies present in apo(a) (kringle IV type 10) contains a lysine binding site (LBS) that is similar to that of plasminogen. This structure allows binding of these proteins to fibrin and cell membranes. Plasminogen thus bound is cleaved at Arg(561)-Val(562) by plasminogen activators and transformed into plasmin. This mechanism ensures fibrinolysis and pericellular proteolysis. In apo(a) a Ser-Ile substitution at the Arg-Val plasminogen activation cleavage site prevents its transformation into a plasmin-like enzyme. Because of this structural/functional homology and enzymatic difference, Lp(a) may compete with plasminogen for binding to lysine residues and impair, thereby, fibrinolysis and pericellular proteolysis. High concentrations of Lp(a) in plasma may, therefore, represent a potential source of antifibrinolytic activity. Indeed, we have recently shown that during the course of the nephrotic syndrome the amount of plasminogen bound and plasmin formed at the surface of fibrin are directly related to in vivo variations in the circulating concentration of Lp(a) (Arterioscler. Thromb. Vase. Biol., 2000, 20: 575-584; Thromb. Hamost., 1999, 82: 121-127). This antifibrinolytic effect is primarily defined by the size of the apo(a) polymorphs, which show heterogeneity in their flibrin-binding activity only small size isoforms display high affinity binding to fibrin (Biochemistry, 1995, 34: 13353-13358). Thus, in heterozygous subjects the amount of Lp(a) or plasminogen bound to fibrin is a function of the affinity of each of the apo(a) isoforms and of their concentration relative to each other and to plasminogen. The real risk factor is, therefore, the Lp(a) subpopulation with high affinity for fibrin. According to this concept, some Lp(a) phenotypes may not be related to atherothrombosis and, therefore, high Lp(a) in some individuals might not represent a risk factor for cardiovascular disease. In agreement with these data, it has been recently reported that Lp(a) particles containing low molecular mass apo(a) emerged as one of the leading risk conditions in advanced stenotic atherosclerosis (Circulation, 1999, 100: 1154-1160). The predictive value of high Lp(a) as a risk factor, therefore, depends on the relative concentration of Lp(a) particles containing small apo(a) isoforms with the highest affinity for fibrin. Within this context, the development of agents able to selectively neutralise the antifibrinolytic activity of Lp(a), offers new perspectives in the prevention and treatment of the cardiovascular risk associated with high concentrations of thrombogenic Lp(a) MH - France MH - Mexico|Distrito Federal PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 28 U4 - Multidisciplinary Sciences U5 - S;Article AV - English IS - 0077-8923 UR - ISI:000172010300025 L2 - fibrin surface;fibrinogen;plasminogen;plasmin;kringle domains;lysine binding site;tissue-plasminogen activator;urokinase;atherosclerosis;thrombosis;atherothrombosis;monocytes;macrophages;fibrinolysis;plasminogen activation;plasminogen activator inhibitor;CORONARY HEART-DISEASE; TISSUE-PLASMINOGEN-ACTIVATOR; RECOMBINANT KRINGLE-1 DOMAIN; EPSILON-AMINOCAPROIC ACID; GROWTH-FACTOR-BETA; BINDING-SITES; IN-VIVO; HUMAN APOLIPOPROTEIN(A); PLASMA-CONCENTRATIONS; LP(A) LIPOPROTEIN SO - Fibrinogen 2001 ;936():261-275 3795 UI - 12597 AU - Nielsen K AU - Smith P AU - Gall D AU - Perez B AU - Samartino L AU - Nicoletti P AU - Dajer A AU - Rojas X AU - Kelly W AD - Canadian Food Inspect Agcy, Anim Dis Res Inst, Nepean, ON K2H 8P9, CanadaServ Agricola & Ganadero, Reg Lab, Osorno, ChileInst Patobiol, INTA, CICV, CC 77, RA-1708 Buenos Aires, DF, ArgentinaUniv Florida, Coll Vet Med, Dept Pathobiol, Gainesville, FL 32611, USAUniv Autonoma Yucatan, FMVZ, Merida, Yucatan, MexicoUniv Austral Chile, Inst Microbiol, Valdivia, ChileNielsen, K, Canadian Food Inspect Agcy, Anim Dis Res Inst, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada TI - Validation of the fluorescence polarization assay for detection of milk antibody to Brucella abortus AB - A fluorescence polarization assay (FPA) for detection of antibody to Brucella abortus in individual milk samples was developed and validated. Samples from 190 cattle from which B. abortus was isolated; milk samples from cattle in herds infected with B. abortus (n = 1086) and positive in the milk ring test (MRT), as well as milk samples from Canadian cattle (with no evidence of brucellosis, n = 2974) were tested by the indirect enzyme immunoassay (IELISA) and the FPA. The sensitivity (based on samples from culture positive cattle) and specificity (based on Canadian milk samples) of the IELISA and the FPA were 100%. The relative sensitivity value obtained with milk from cattle of infected herds and the specificity values of the IELISA were 98.5 and 99.9%, respectively. The relative sensitivity and specificity of the FPA with the same samples were 82.2 and 99.4% using a cutoff value of 90 millipolarization units (mP). The low relative sensitivity value of the FPA was shown, by competitive enzyme immunoassay (CELISA), to be due to vaccinal antibody (assumed as vaccinal antibody against B. abortus S19 is excluded by the FPA and CELISA but not by the MRT and the IELISA), present in some of the milk samples. The FPA is a homogeneous assay which, unlike the MRT and the IELISA, may be used for testing in the field MH - Argentina MH - Canada MH - Chile MH - Mexico|Yucatan MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 8 U4 - Biochemical Research Methods;Immunology;Medical Laboratory Technology U5 - J;Article AV - English IS - 1532-1819 UR - ISI:000171605600002 L2 - ENZYME-IMMUNOASSAY SO - Journal of Immunoassay & Immunochemistry 2001 ;22(3):203-211 3796 UI - 13862 AU - Nielsen K AU - Gall D AU - Smith P AU - Kelly W AU - Yeo J AU - Kenny K AU - Heneghan T AU - McNamara S AU - Maher P AU - O'Connor J AU - Walsh B AU - Carroll J AU - Rojas X AU - Rojas F AU - Perez B AU - Wulff O AU - Buffoni L AU - Salustio E AU - Gregoret R AU - Samartino L AU - Dajer A AU - Luna-Martinez E AD - Canadian Food Inspect Agcy, Anim Dis Res Inst, Nepean, ON K2H 8P9, CanadaKeyLabs Ltd, Dublin 8, IrelandDept Agr & Food, Cork, IrelandDept Agr & Food, Dublin, IrelandDept Agr & Food, Kildare, IrelandDept Agr & Food, Limerick, IrelandUniv Austral Chile, Inst Microbiol, Valdivia, ChileServ Agricola & Ganadero, Reg Lab, Osorno, ChileCICV, INTA, Inst Patobiol, Buenos Aires, DF, ArgentinaUniv Autonoma Yucatan, Merida, Yucatan, MexicoSAGAR, Mexico City, DF, MexicoNielsen, K, Canadian Food Inspect Agcy, Anim Dis Res Inst, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada TI - Fluorescence polarization assay for the diagnosis of bovine brucellosis: adaptation to field use AB - A fluorescence polarization assay (FPA) was used to test whole blood samples prepared by mixing blood cells from cattle without exposure to Brucella abortus (B. abortus) with sera from animals with confirmed (bacteriologically) infection. A cut-off value between negative and positive values was initially established to be 87.2 mP. This value was changed to 95 mP to increase assay specificity without loss of sensitivity when testing blood samples from negative animals. The FPA technology was applied to whole blood samples in the field and to stored whole blood samples using two diluent buffers. Relative sensitivity and specificity values for the FPA performed in the field, based on buffered antigen plate agglutination test and competitive enzyme immunoassay results were 95.3 and 97.3%, respectively However, to obtain maximum sensitivity and specificity, a cut-off value of 105 mP was determined for fresh whole blood samples. The relative sensitivity and specificity values of the FPA when testing stored whole blood samples were 100% each using a 95 mP cut-off. The usefulness of the FPA for testing whole blood samples in the field was demonstrated. Crown Copyright (C) 2001 Published by Elsevier Science B.V. All rights reserved MH - Argentina MH - Canada MH - Chile MH - Ireland MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Microbiology;Veterinary Sciences U5 - J;Article AV - English IS - 0378-1135 UR - ISI:000168142700006 L2 - Brucella abortus;fluorescence polarization assay;diagnosis;serology;field application;ABORTUS; VALIDATION; ANTIBODY SO - Veterinary Microbiology 2001 ;80(2):163-170 3797 UI - 12088 AU - Nieto-Martinez MD AU - Maupome G AU - Barcelo-Santana F AD - Ctr Hlth Res Portland, Portland, OR 97227, USAUniv Nacl Autonoma Mexico, Fac Odontol, Mexico City 04510, DF, MexicoMaupome, G, Ctr Hlth Res Portland, 3800 N Interstate Ave, Portland, OR 97227 USA TI - Effects of diameter, chemical impregnation and hydration on the tensile strength of gingival retraction cords AB - Gingival retraction cords are useful clinical aids but little information is available regarding desirable physical features that would preserve their integrity under tensile forces. The study aimed to establish under experimental conditions the extent to which tensile strength is affected by variation in cord diameter; impregnation with ferric sulphate (FS) or aluminium sulphate (AS); and cord hydration (wet/dry). Commercial cords and standard cotton cords were assayed in an Instron 1137 machine. Data were analysed using t-test, and one- and four-way ANOVA. Results indicated that tensile strength for 200 commercial cords was 1.4950 +/-1.032 kg; and for 560 cotton cords was 1.2964 +/-1.4560 kg. Cord hydration had no significant effect on tensile strength, whereas impregnation with AS or FS, a smaller diameter, and/or being a cotton cord decreased tensile strength (P<0.001). Bivariate analyses showed that hydrated commercial cords had higher tensile strength than dry specimens; hydrated or dry cotton cords were not different. The FS-impregnated cotton cords had lower tensile strength than AS-impregnated or control cords, and the effect was greater at higher FS concentrations. This study is one of the first evaluations of the physical properties of cords, highlighting characteristics that may minimize the risk of tearing MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0305-182X UR - ISI:000173046100003 L2 - gingival retraction cord;periodontal health;gingiva;tensile strength;physical properties;FIXED PROSTHODONTICS; TISSUE MANAGEMENT SO - Journal of Oral Rehabilitation 2001 ;28(12):1094-1100 3798 UI - 14192 AU - Nieto N AU - Dominguez-Rosales JA AU - Fontana L AU - Salazar A AU - rmendariz-Borunda J AU - Greenwel P AU - Rojkind M AD - Albert Einstein Coll Med, Marion Bessin Liver Res Ctr, Dept Med, Bronx, NY 10461, USAAlbert Einstein Coll Med, Marion Bessin Liver Res Ctr, Dept Pathol, Bronx, NY 10461, USAUniv Guadalajara, Ctr Univ Ciencias Salud, Inst Biol Mol Med, Guadalajara 44430, Jalisco, MexicoCUNY Mt Sinai Sch Med, Dept Biochem & Mol Biol, Brookdale Ctr, New York, NY 10029, USARojkind, M, Albert Einstein Coll Med, Marion Bessin Liver Res Ctr, Dept Med, U-625,1300 Morris Pk Ave, Bronx, NY 10461 USA TI - Rat hepatic stellate cells contribute to the acute-phase response with increased expression of alpha 1(I) and alpha 1(IV) collagens, tissue inhibitor of metalloproteinase-1, and matrix-metalloproteinase-2 messenger RNAs AB - The acute-phase response (APR) represents a systemic reaction of the organism to multiple nonspecific inflammatory stimuli. In general, it is protective for the host, and hepatocytes are the main cells responding with alterations in the expression of a set of liver-specific proteins named the acute-phase proteins. We have previously shown that although a turpentine-induced APR is not fibrogenic per se, it enhances collagen deposition in rats treated with CCl4 and up-regulates expression of hepatic alpha1(I) collagen and tissue inhibitor of metalloproteinases 1 (TIMP-1) messenger RNAs (mRNAs). In this report we extended our studies and showed that turpentine induced, in a time-dependent manner, expression of alpha1(I) and alpha1(IV) collagens, TIMP-1, and matrix-metalloproteinase 2 (MMP-2) mRNAs, We further showed that expression of these mRNAs occurs in hepatic stellate cells, but not in hepatocytes obtained 6 hours after the induction of an APR episode. These changes were accompanied by increased blood levels of tumor necrosis factor alpha (TNF-alpha) and interleukin 6 (IL-6) without noticeable immediate changes in the expression of their respective mRNAs in the liver. In contrast to CCl4-induced liver damage, turpentine alone, whether administered as a single dose or as a weekly dose for 3 weeks did not up-regulate expression of transforming growth factor beta1 (TGF-beta1) mRNA and did not result in excess collagen deposition. Overall, these findings suggest that collagen deposition in the livers of rats with repeated APR episodes may be enhanced only when given together with a fibrogenic stimulus that activates hepatic stellate cells (HSCs) and/or up-regulates TGF-beta1 mRNA expression MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 27 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0270-9139 UR - ISI:000167274200015 L2 - TUMOR-NECROSIS-FACTOR; ALCOHOLIC LIVER-DISEASE; GROWTH-FACTOR-BETA; GENE-EXPRESSION; COMPLEMENTARY-DNA; MOLECULAR-CLONING; ONCOSTATIN-M; INTERLEUKIN-6; CYTOKINES; PROTEINS SO - Hepatology 2001 ;33(3):597-607 3799 UI - 13009 AU - Nikishin S AU - Kipshidze G AU - Kuryatkov V AU - Choi K AU - Gherasoiu I AU - de Peralta LG AU - Zubrilov A AU - Tretyakov V AU - Copeland K AU - Prokofyeva T AU - Holtz M AU - Asomoza R AU - Kudryavtsev Y AU - Temkin H AD - Texas Tech Univ, Dept Elect Engn, Lubbock, TX 79401, USAAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaTexas Tech Univ, Dept Phys, Lubbock, TX 79401, USACINVESTAV, Dept Elect Engn, SIMS Lab SEES, Mexico City 07300, DF, MexicoTexas Tech Univ, Dept Elect Engn, Lubbock, TX 79401, USANikishin, S, Texas Tech Univ, Dept Elect Engn, Lubbock, TX 79401, USA TI - Gas source molecular beam epitaxy of high quality AlxGa1-xN (0 <= x <= 1) on Si(111) AB - Layers of AlxGa1-xN, with 0 less than or equal to x less than or equal to 1, were grown on Si(111) substrates by gas source molecular beam epitaxy with ammonia. We show that the initial formation of the Si-N-Al interlayer between the Si substrate and the AIN layer, at a growth temperature of 1130-1190 K, results in very rapid transition to two-dimensional growth mode of AIN. The transition is essential for subsequent growth of high quality GaN, AlxGa1-xN, and AlGaN/GaN superlattices. The undoped GaN layers have a background electron concentration of (2-3) x 10(16) cm(-3) and mobility up to (800 +/- 100) cm(2)/V s, for film thickness similar to 2 mum. The lowest electron concentration in AlxGa1-xN,with 0.2 < x < 0.6, similar to (2-3) x 10(16) cm(-3) for 0.5-0.7-mum-thick film. Cathodoluminescence and optical reflectance spectroscopy were used to study optical properties of these AlxGa1-xN layers. We found that the band gap dependence on composition can be described as E-g(x) = 3.42 + 1.21x + 1.5x(2). p-n junctions have been formed on crack-free layers of GaN with the use of Mg dopant. Light emitting diodes with peak emission wavelength at 3.23 eV have been demonstrated. (C) 2001 American Vacuum Society MH - Mexico|Distrito Federal MH - Russia MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 1071-1023 UR - ISI:000170598400047 L2 - LIGHT-EMITTING-DIODES; ULTRAVIOLET; ALGAN; GROWTH; FILMS; PHOTODETECTORS; SILICON; AMMONIA SO - Journal of Vacuum Science & Technology B-An International Journal Devoted to Microelectronics and Nanometer Structures-Processing Measurement and Phenomena 2001 ;19(4):1409-1412 3800 UI - 12332 AU - Nikolaitchouk N AU - Wacher C AU - Falsen E AU - Andersch B AU - Collins MD AU - Lawson PA AD - Univ Reading, Sch Food Biosci, Reading, Berks, EnglandUniv Gothenburg, Dept Clin Bacteriol, Gothenburg, SwedenRussian Peoples Friendship Univ, Moscow, RussiaUniv Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoLawson, PA, Univ Reading, Sch Food Biosci, Reading, Berks, England TI - Lactobacillus coleohominis sp nov., isolated from human sources AB - Four strains of a hitherto unrecognized Gram-positive, catalase-negative, facultatively anaerobic, rod-shaped bacterium isolated from human sources were characterized using phenotypic and molecular taxonomic methods. Comparative 16S rRNA gene sequencing demonstrated that the bacterium represents a new subline within the Lactobacillus casei/Pediococcus rRNA group of the genus Lactobacillus. The unknown bacterium was readily distinguished from all other described Lactobacillus species and related taxa by biochemical tests and electrophoretic analysis of whole-cell proteins. On the basis of phylogenetic and phenotypic evidence, it is proposed that the unknown bacterium be classified as Lactobacillus coleohominis sp. nov. The type strain of Lactobacillus coleohominis is CCUG 44007(T) (= CIP 106820(T)) MH - United Kingdom MH - Mexico|Distrito Federal MH - Russia MH - Sweden PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000172374400018 L2 - Lactobacillus coleohominis;16S rRNA;taxonomy;phylogeny;LACTIC-ACID BACTERIA SO - International Journal of Systematic and Evolutionary Microbiology 2001 ;51():2081-2085 3801 UI - 11660 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - Quantum cosmology, inflationary brane-world creation and dS/CFT correspondence AB - The creation of 4d de Sitter (inflationary) boundary gluing two d5 de Sitter bulks on the classical as well as on quantum level (with account of brane QFT via corresponding trace anomaly induced effective action) is discussed. Quantum effects decrease the classical de Sitter brane radius or create new de Sitter brane with even smaller radius. It is important that brane CFT may be chosen to be dual to one of 5d de Sitter bulks, making the explicit relation of de Sitter brane-world with dS/CFT correspondence. In this way, the localization of gravity on the brane is shown. Moving (time-dependent) de Sitter brane in d5 SdS BH is considered. In the special coordinate system where brane equations look like quantum-corrected FRW equations the comparison with similar brane equations in SAdS BH bulk is done MH - Japan MH - Mexico|Guanajuato PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 54 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000174174500033 L2 - D-branes;AdS-CFT correspondence;black holes;DESITTER SPACE; ENTROPY; DIMENSION; GRAVITY SO - Journal of High Energy Physics 2001 ;(12): 3802 UI - 11986 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoKyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Holographic entropy and brane FRW dynamics from AdS black hole in d5 higher derivative gravity AB - Higher derivative bulk gravity (without Riemann tensor square term) admits AdS-Schwarzschild black hole as an exact solution. It is shown that induced brane geometry on such background is open, flat or closed FRW radiation dominated universe. Higher derivative terms contributions appear in the Hawking temperature, entropy and Hubble parameter via the redefinition of five-dimensional gravitational constant and AdS scale parameter. These higher derivative terms do not destroy the AdS-dual description of radiation represented by strongly-coupled CFT. The Cardy-Verlinde formula which expresses cosmological entropy as the square root from other parameters and entropies is derived in R-2 gravity. The corresponding cosmological entropy bounds are briefly discussed MH - Japan MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 25 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000173284800008 L2 - ADS/CFT CORRESPONDENCE SO - International Journal of Modern Physics A 2001 ;16(31):5085-5099 3803 UI - 12232 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - De Sitter space versus Nariai black hole: stability in D5 higher derivative gravity AB - D5 higher derivative gravity on the Schwarzschild-de Sitter (SdS) black hole background is considered. Two horizons SdS BHs are not in thermal equilibrium and Hawking-Page phase transitions are not expected there, unlike to the case of AdS BHs. It is demonstrated that there exists the regime of D5 theory where Nariai BH which is extremal limit of SdS BH is stable. It is in the contrast with Einstein gravity on such background where only pure de Sitter space is always stable. Speculating on the applications in proposed dS/CFT correspondence, these two (de Sitter and Nariai) stable spaces may correspond to confining-deconfining phases in dual CFT. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 31 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172607200023 L2 - DILATON-COUPLED SCALARS; PROBING F-THEORY; ORIENTIFOLDS; BRANES; MATTER SO - Physics Letters B 2001 ;523(1-2):165-170 3804 UI - 12317 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Anti-de-Sitter black hole thermodynamics in higher derivative gravity and new confining-deconfining phases in dual CFT AB - The thermodynamics of d5 AdS BHs with positive, negative or zero curvature spatial section in higher derivative (HD) gravity is described. HID contribution to free energy may change its sign which leads to more complicated regime for Hawking-Page phase transitions. Some variant of d5 HD gravity is dual to N = 2 Sp(N) SCFT up to the next-to-leading order in large N. Then, according to Witten interpretation the stable AdS BH phase corresponds to deconfinement while global AdS phase corresponds to confinement. Unlike to Einstein gravity in ED theory the critical N appears. It may influence the phase transition structure. In particular, what was confining phase above the critical value becomes the deconfining phase below it and vice-versa. (C) 2001 Published by Elsevier Science B.V MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 43 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172330200014 L2 - thermodynamics;higher derivative gravity;AdS BH;phase transitions;AdS/CFT correspondence;PROBING F-THEORY; STRING THEORY; ORIENTIFOLDS; BRANES SO - Physics Letters B 2001 ;521(1-2):87-95 3805 UI - 12576 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanTomsk State Pedag Univ, Tomsk 634041, RussiaUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Conformal anomaly from dS/CFT correspondence AB - In frames of dS/CFT correspondence suggested by Strominger we calculate holographic conformal anomaly for dual Euclidean CFT. The holographic renormalization group method is used for this purpose. It is explicitly demonstrated that two-dimensional and four-dimensional conformal anomalies (or corresponding central charges) have the same form as those obtained in AdS/CFT duality. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 82 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171698800019 L2 - ADS/CFT CORRESPONDENCE; GRAVITY SO - Physics Letters B 2001 ;519(1-2):145-148 3806 UI - 13052 AU - Nojiri S AU - Obregon O AU - Odintsov SD AU - Tkach VI AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - String versus Einstein frame in an AdS/CFT induced quantum dilatonic brane-world universe AB - An AdS/CFT induced quantum dilatonic brane world where the 4D boundary is flat or a de Sitter (inflationary) or anti-de Sitter brane is considered. The classical brane tension is fixed but the boundary QFT produces the effective brane tension by means of the account of corresponding conformal anomaly induced effective action. This results in inducing brane worlds in accordance with the AdS/CFT setup as warped compactification. The explicit. independent construction of quantum induced dilatonic brane worlds in two frames, the string and Einstein frames, is done. Their complete equivalency is demonstrated for all quantum cosmological brane worlds under discussion. including several examples of classical brane-world black holes. This is different from quantum corrected 4D dilatonic gravity where a de Sitter solution exists in the Einstein but not in the Jordan (string) frame. The role of quantum corrections in massive graviton perturbations around an anti-de Sitter brane is briefly discussed MH - Japan MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000170467600018 L2 - EXTRA DIMENSION; DOMAIN-WALLS; BLACK-HOLES; GRAVITY; COSMOLOGY; INFLATION; COMPACTIFICATION; HIERARCHY; CONSTANT; 2D SO - Physical Review D 2001 ;6404(4): 3807 UI - 13068 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon, Guanajuato, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - AdS/CFT correspondence, conformal anomaly and quantum corrected entropy bounds AB - The role of conformal anomaly in AdS/CFT and related issues is clarified. The comparison of holographic and QFT conformal anomalies (with the account of brane quantum gravity contribution) indicates the possibility for brane quantum gravity to occur within the AdS/CFT setup. Three-dimensional quantum induced inflationary (or hyperbolic) brave-world is shown to be realized in the frames of AdS3/CFT2 correspondence where the role of 2d brane cosmological constant is played by effective tension due to two-dimensional conformal anomaly. The dynamical equations to describe 4d FRW universe with the account of quantum effects produced by conformal anomaly are obtained. The quantum corrected energy, pressure and entropy are found. The dynamical evolution of entropy bounds in the inflationary universe is estimated and its comparison with quantum corrected entropy is done. It is demonstrated that entropy bounds for quantum corrected entropy are getting the approximate ones and occur for some limited periods of evolution of the inflationary universe MH - Japan MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 30 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000170476900005 L2 - COSMOLOGY; GRAVITY; WORLD SO - International Journal of Modern Physics A 2001 ;16(19):3273-3289 3808 UI - 13259 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Hashirimizu Yokosuka 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Hashirimizu Yokosuka 2398686, Japan TI - Supersymmetric new brane-world AB - The quantum-induced dilatonic brane-world (new brane-world) is created by brane conformal field theory (CFT) quantum effects (giving effective brane tension) in accordance with the AdS/CFT setup which also defines the surface term. Considering the bosonic sector of 5D gauged supergravity with a single scalar and taking the boundary action as predicted by supersymmetry (SUSY), the possibility of supersymmetrizing the dilatonic new brane-world is discussed. It is demonstrated that for a number of superpotentials the flat SUSY dilatonic brane-world (with dynamically induced brane dilaton) or quantum-induced de Sitter dilatonic brane-world (not the anti-de Sitter one) where SUSY is broken by the quantum effects occurs. The analysis of graviton perturbations indicates that gravity is localized on such branes MH - Japan MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000169947400012 L2 - SUPERGRAVITY; GRAVITY; BULK; ADS SO - Physical Review D 2001 ;6402(2): 3809 UI - 13306 AU - Nojiri S AU - Obregon O AU - Odintsov SD AU - Quevedo H AU - Ryan MP AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoTomsk State Pedagog Univ, Tomsk 634041, RussiaNojiri, S, Natl Def Acad, Dept Appl Phys, Hashirimizu, Yokosuka, Kanagawa 2398686, Japan TI - Quantum bounds for gravitational de Sitter entropy and the Cardy-Verlinde formula AB - We analyze different types of quantum corrections to the Cardy-Verlinde entropy formula in a Friedmann-Robertson-Walker universe and in an (anti)-de Sitter space. In all cases we show that quantum corrections can be represented by an effective cosmological constant which is then used to redefine the parameters entering the Cardy-Verlinde formula so that it becomes valid also with quantum corrections, a fact that we interpret as a further indication of its universality. A proposed relation between Cardy-Verlinde formula and the ADM Hamiltonian constraint is given MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 22 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000169846800004 SO - Modern Physics Letters A 2001 ;16(18):1181-1192 3810 UI - 13492 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoOchanomizu Univ, Dept Phys, Tokyo 1120012, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - A dynamical brane in the gravitational dual of N=2 Sp(N) superconformal field theory AB - The particular model of d5 higher derivative gravity which is dual to N = 2 Sp(N) SCFT is considered. A (perturbative),AdS black hole in such theory is constructed in the next-to-leading order of the AdS/CFT correspondence. The surface counterterms are fixed by the conditions required for a well-defined variational procedure and the finiteness of AdS space (when the brane goes to infinity). A dynamical brane is realized at the boundary of an AdS black hole with a radius that is larger than the horizon radius. The AdS/CFT correspondence dictates the parameters of the gravitational dual in such a way that the dynamical brane (the observable universe) always occurs outside the horizon MH - Japan MH - Mexico|Guanajuato PB - KYOTO: PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0033-068X UR - ISI:000169168700013 L2 - EXTRA DIMENSION; ADS/CFT CORRESPONDENCE; DOMAIN-WALLS; WORLD; INFLATION; GRAVITY; COSMOLOGY; COMPACTIFICATION; SUPERGRAVITY; ORIENTIFOLDS SO - Progress of Theoretical Physics 2001 ;105(5):869-879 3811 UI - 13692 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanTomsk State Pedag Univ, Tomsk 634041, RussiaUniv Guanajuato, Inst Fis, Leon 37150, MexicoOchanomizu Univ, Dept Phys, Bunkyou Ku, Tokyo 1120012, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Quantum stabilization of thermal brane-worlds in M-theory AB - Low-energy effective M-theory (11d supergravity or lid SUSY theory) is considered in 11d flat or AdS background. After orbifold compactification of eleventh dimension one gets flat 10d brane at non-zero temperature. Quantum effective potential (free energy at low-temperature approximation) is calculated on such brane with account of only lowest mass from Kaluza-Klein modes. Such effective potential may stabilize the radius of 11th dimension (radion stabilization) as it is demonstrated explicitly. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000168579900028 L2 - NONZERO TEMPERATURE; 11 DIMENSIONS; STRING THEORY; ONE-LOOP; COMPACTIFICATION; DYNAMICS; VORTICES; SHEET SO - Physics Letters B 2001 ;506(1-2):200-206 3812 UI - 13870 AU - Nojiri S AU - Odintsov SD AU - Osetrin KE AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, JapanTomsk State Univ, Tomsk 634041, RussiaUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 239, Japan TI - Dilatonic quantum muli-brane-worlds AB - A five-dimensional dilatonic gravity action with surface counterterms motivated by AdS/CFT (conformal fluid theory) correspondence and with contributions of brane-quantum CFTs is considered around an AdS-like bulk. The effective equations of motion are constructed. They admit two (outer and inner), or multi-brane, solutions where the brane CFTs may be different. The role of quantum-brane CFT is in inducing a complicated brane dilatonic gravity. For exponential bulk potentials the number of AdS-like bulk spaces is found in analytical form. The corresponding flat or curved (de Sitter or hyperbolic) dilatonic two branes are created, as a rule, thanks to quantum effects. The observable early universe may correspond to an inflationary brane. The found dilatonic quantum two-brane-worlds usually contain a naked singularity but in a couple explicit examples the curvature is finite and a horizon (corresponding to wormholelike space) appears MH - Japan MH - Mexico|Guanajuato MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000168203400045 L2 - FLAT DOMAIN-WALLS; SUPER YANG-MILLS; EXTRA DIMENSION; COSMOLOGICAL CONSTANT; GAUGED SUPERGRAVITY; LOCALIZED GRAVITY; STRING THEORY; INFLATION; UNIVERSE; COMPACTIFICATION SO - Physical Review D 2001 ;6308(8): 3813 UI - 14003 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Math & Phys, Yokosuka, Kanagawa 239, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoTomsk State Pedag Univ, Tomsk 634041, RussiaNojiri, S, Natl Def Acad, Dept Math & Phys, Yokosuka, Kanagawa 239, Japan TI - Quantum dilatonic gravity in d=2, 4 and 5 dimensions AB - We review (mainly) quantum effects in the theories where the gravity sector is described by metric and dilaton. The one-loop effective action for dilatonic gravity in two and four dimensions is evaluated. Renormalization group equations are constructed. The conformal anomaly and induced effective action for 2d and 4d dilaton coupled theories are found. It is applied to the study of quantum aspects of black hole thermodynamics, like calculation of Hawking radiation and quantum corrections to black hole parameters and investigation of quantum instability for such objects with multiple horizons. The use of the above effective action in the construction of nonsingular cosmological models in Einstein or Brans-Dicke (super)gravity and investigation of induced wormholes in supersymmetric Yang-Mills theory are given. 5d dilatonic gravity (bosonic sector of compactified IIB supergravity) is discussed in connection with bulk/boundary (or AdS/CFT) correspondence. Running gauge coupling and quark-antiquark potential for boundary gauge theory at zero or nonzero temperature are calculated from d = 5 dilatonic anti-de Sitter-like background solution which represents anti-de Sitter black hole for periodic time MH - Japan MH - Mexico|Guanajuato MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 48 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Review AV - English IS - 0217-751X UR - ISI:000167769000001 L2 - YANG-MILLS THEORY; ONE-LOOP RENORMALIZATION; BLACK-HOLE EVAPORATION; CURVED SPACE-TIME; SPHERICALLY SYMMETRIC-SYSTEMS; PROBING F-THEORY; DE-SITTER SPACE; N GAUGE-THEORY; STRING THEORY; 2 DIMENSIONS SO - International Journal of Modern Physics A 2001 ;16(6):1015-1108 3814 UI - 14257 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoOchanomizu Univ, Dept Phys, Bunkyo Ku, Tokyo 1120012, JapanOgushi, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Holographic renormalization group and conformal anomaly for AdS(9)/CFT8 correspondence AB - Holographic Renormalization Group (RG) in nine dimensions is considered. The d8 holographic conformal anomaly is found. It should correspond to d8 CPT in AdS(9)/CFT8 correspondence. The comparison of holographic and QFT anomalies in d8 de Sitter space is done. It may give the indication for rigorous AdS(9)/CFT8 correspondence proposal. (C) 2001 Published by Elsevier Science B.V MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000167082100025 L2 - ADS/CFT CORRESPONDENCE; GRAVITY; SUPERGRAVITY; DIMENSIONS SO - Physics Letters B 2001 ;500(1-2):199-208 3815 UI - 13506 AU - Nolan LA AU - Dunlop JS AU - Kukula MJ AU - Hughes DH AU - Boroson T AU - Jimenez R AD - Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandINOAE, Puebla 72000, MexicoNatl Opt Astron Observ, Tucson, AZ 85726, USANolan, LA, Univ Edinburgh, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - The ages of quasar host galaxies AB - We present the results of fitting deep off-nuclear optical spectra of radio-quiet quasars, radio-loud quasars and radio galaxies at z similar or equal to 0.2 with evolutionary synthesis models of galaxy evolution. Our aim was to determine the age of the dynamically dominant stellar populations in the host galaxies of these three classes of powerful active galactic nuclei (AGN). Some of our spectra display residual nuclear contamination at the shortest wavelengths, but the detailed quality of the fits longward of the 4000-Angstrom break provides unequivocal proof, if further proof were needed, that quasars lie in massive galaxies with (at least at z similar or equal to 0.2) evolved stellar populations. By fitting a two-component model we have separated the very blue (starburst and/or AGN contamination) from the redder underlying spectral energy distribution, and find that the hosts of all three classes of AGN are dominated by old stars of age 8-14 Gyr. If the blue component is attributed to young stars, we find that, at most, 1 per cent of the visible baryonic mass of these galaxies is involved in star formation activity at the epoch of observation, at least over the region sampled by our spectroscopic observations. These results strongly support the conclusion reached by McLure et al. that the host galaxies of luminous quasars are massive ellipticals which have formed by the epoch of peak quasar activity at z similar or equal to 2.5 MH - Mexico|Puebla MH - United Kingdom MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 51 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000169229600012 L2 - galaxies : active;galaxies : evolution;quasars : general;galaxies : stellar content;RADIO-QUIET QUASARS; LOUD QUASARS SO - Monthly Notices of the Royal Astronomical Society 2001 ;323(2):308-330 3816 UI - 13086 AU - Noth H AU - Schlegel A AU - Lima SR AD - Univ Munich, Dept Chem, D-81377 Munich, GermanyUniv Autonoma Estado Hidalgo, Dept Quim, Pachuca, MexicoNoth, H, Univ Munich, Dept Chem, Butenandtstr 5-13,House D, D-81377 Munich, Germany TI - Synthesis and structures of some lithium and sodium (aminoalcoholato)hydrido aluminates AB - LiAlH4 and NaAlH4 were allowed to react in a 1:1, 1:2 and 1:3 ratio with 2-dimethylaminoethanol, 1-dimethylamino-2-propanol, and (-)-N-methylephedrine. Reactions in the 1: 1 ratio leads to mixtures of M(AlH4-n(OR ' NMe2)(n)) in thf solution showing a temperature dependent composition. From the solutions obtained in a 1: 2 or 1: 3 ratio the following compounds were isolated as single crystals: (thf)NaAlH2. (OCH2-CH2NMe2)(2) (2), LiAlH2(OCHMe-CH2NMe2)(2) (3), LiAlH2(OCHPh-CHMe-NMe2)(2) (4), LiAlH(OCH2CH2NMe2)(3) (5), NaAlH(OCH2CH2NMe2)(3) (6). All compounds are dimers in the solid state and their Al atoms are pentacoordinated. M-H-Al bridges were found only in the dihydridoaluminate 2 MH - Germany MH - Mexico|Hidalgo PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0044-2313 UR - ISI:000170291000014 L2 - aluminium;aluminates;hydrido aluminates;AXIALLY DISSYMMETRIC MOLECULES; ENANTIOSELECTIVE REDUCTION; ASYMMETRIC REDUCTION; KETONES; REAGENTS SO - Zeitschrift fur Anorganische und Allgemeine Chemie 2001 ;627(8):1793-1800 3817 UI - 12075 AU - Novaro V AU - Colman-Lerner A AU - Ortega FV AU - Jawerbaum A AU - Paz D AU - Lo Nostro F AU - Pustovrh C AU - Gimeno MF AU - Gonzalez E AD - Inst Mol Sci, Berkeley, CA 94704, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoFac Ciencias Exactas & Nat Buenos Aires, RA-1428 Buenos Aires, DF, ArgentinaCtr Estudios Farmacol & Bot, RA-1414 Buenos Aires, DF, ArgentinaNovaro, V, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,Bldg 83, Berkeley, CA 94720 USA TI - Regulation of metalloproteinases by nitric oxide in human trophoblast cells in culture AB - The process of embryo implantation requires extensive remodelling of the endometrial extracellular matrix, a function largely performed by matrix-degrading metalloproteinases (MMPs). In the present study, we used trophoblast cells isolated from human term placentas to study the regulation of MNMs by nitric oxide (NO). Using a combination of zymography, Western blot and indirect immunofluorescence, we showed that MMP-2 and MMP-9 are increased during the conversion from low-motile cytotrophoblast cells to the highly motile and differentiated syncytiotrophoblast multinucleated cells. We also observed an increase in NO production and NO synthase (NOS) expression during this cellular differentiation process. In addition, we demonstrated a positive regulatory role of NO on the activity and protein expression of MMP-2 and MMP-9, because NO donors (NOC-18 and spermine-NONOate) or the NOS substrate (L-arginine) stimulate, whereas NOS inhibitors (N-G-nitro-L-arginine methyl ester and N-G-monomethyl-L-arginine) reduce the expression and gelatinolytic activity of MMP-2 and MMP-9 in isolated trophoblast cells. Taken together, these results suggest that, in differentiating trophoblasts, NO regulates the induction of matrix-degrading proteases required for invasion during embryo implantation MH - Argentina MH - USA MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 28 U4 - Developmental Biology;Reproductive Biology;Zoology U5 - J;Article AV - English IS - 1031-3613 UR - ISI:000172979700010 L2 - cytotrophoblast cells;embryo implantation;nitric oxide synthase;placentation;syncytio-trophoblast cells;MATRIX-DEGRADING METALLOPROTEINASES; MOUSE EMBRYO IMPLANTATION; IV COLLAGENASE; GROWTH-FACTOR; ARTICULAR CHONDROCYTES; CYTOTROPHOBLAST CELLS; TISSUE INHIBITORS; GENE-EXPRESSION; IN-VITRO; SYNTHASE SO - Reproduction Fertility and Development 2001 ;13(5-6):411-420 3818 UI - 12195 AU - Nowakowski M AD - Univ Los Andes, Dept Fis, Santafe De Bogota DC, ColombiaUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNowakowski, M, Univ Los Andes, Dept Fis, AA 4976, Santafe De Bogota DC, Colombia TI - Subtleties in CPT transformation for Majorana fermions AB - We point out the relevance of the so-called Majorana creation phase in the s-channel matrix elements in connection with the CPT transfomation of the latter MH - Colombia MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000172450600081 L2 - ELECTROMAGNETIC PROPERTIES; NEUTRINOS; SUPERSYMMETRY; PHYSICS SO - Physical Review D 2001 ;6411(11): 3819 UI - 13457 AU - Nucamendi U AU - Salgado M AU - Sudarsky D AD - Univ Sussex, Ctr Theoret Phys, Brighton BN1 9QJ, E Sussex, EnglandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNucamendi, U, Univ Sussex, Ctr Theoret Phys, Brighton BN1 9QJ, E Sussex, England TI - Alternative approach to the galactic dark matter problem AB - We discuss scenarios in which the galactic dark matter in spiral galaxies is described by a long range coherent field which settles in a stationary configuration that might account for the features of the galactic rotation curves. The simplest possibility is to consider scalar fields, so we discuss, in particular, two mechanisms that would account for the settlement of the scalar field in a nontrivial configuration in the absence of a direct coupling of the field with ordinary matter: topological defects and spontaneous scalarization MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000169288400061 L2 - SPIRAL GALAXIES; GLOBAL MONOPOLES; ROTATION CURVES; HAIR THEOREM; BRIGHT SIDE; BLACK-HOLES; BOSON STARS; MILKY-WAY; MASS; FIELD SO - Physical Review D 2001 ;6312(12): 3820 UI - 12161 AU - Nunez-Farfan J AU - Schlichting CD AD - Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USAUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol & Evolut, Mexico City 04510, DF, MexicoNunez-Farfan, J, Univ Connecticut, Dept Ecol & Evolutionary Biol, 75 N Eagleville Rd,U-3043, Storrs, CT 06269 USA TI - Evolution in changing environments: The "synthetic" work of Clausen, Keck, and Hiesey AB - The studies of Clausen, Keck, and Hiesey (CKH) have been widely cited as exemplars of ecotypic differentiation in textbooks and in the primary literature. However, the scope of their findings and achievements is significantly than this. In this paper we analyze the research program of CW highlighting their major findings du ring the years when the modern synthesis of evolution was taking shape. That synthesis, curiously, drew little from their examples, although their studies at the Carnegie Institution represent conceptual and methodological work that is still relevant. The works of CKH not only embodied the principles of the nascent synthesis, but often provided needed supporting data. Their classic work, especially on Achillea and Potentilla, produced abundant evidence on population differentiation of many quantitative traits and plant phenotypes, as well as demonstrating the now commonly reported distinction between environmental and genetic determination of traits. Their ecological genetic investigations of quantitative traits in plants were in sharp contrast to contemporaneous animal studies on adaptation that focused on discrete polymorphisms - with correspondingly little influence of the environment on phenotypic expression. Of utmost importance was the demonstration by CKH of adaptive differentiation by natural selection and their approaches to understanding the genetic structure of populations MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 3 U4 - Biology U5 - J;Review AV - English IS - 0033-5770 UR - ISI:000172774300002 SO - Quarterly Review of Biology 2001 ;76(4):433-457 3821 UI - 12321 AU - Nuno-Donlucas S AU - Puig J AU - Katime I AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Pais Vasco, Fac Ciencias, Dept Quim Fis, Grp Nuevos Mat, Bilbao 48990, SpainKatime, I, Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, Mexico TI - Hydrogen bonding and miscibility behavior in poly [ethylene-co-(acrylic acid)] and poly (N-vinylpyrrolidone) mixtures MH - Mexico|Jalisco MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1352 UR - ISI:000172273100002 L2 - POLY(N-VINYL PYRROLIDONE); INFRARED-SPECTROSCOPY; BLENDS; POLY(N-VINYL-2-PYRROLIDONE); COMPATIBILITY; ITACONATE); FTIR SO - Macromolecular Chemistry and Physics 2001 ;202(16):3106-3111 3822 UI - 13986 AU - Nuno-Donlucas S AU - Cesteros LC AU - Puig JE AU - Katime I AD - Univ Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, Bilbao, SpainUniv Guadalajara, CUCEI, Dept Ingn Quim, Guadalajara, Jalisco, MexicoKatime, I, Univ Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, Apdo Apartado 640, Bilbao, Spain TI - Effect of the acrylic acid content on miscibility and mechanical properties of mixtures of poly[ethylene-co(acrylic acid)] and poly(2-ethyl-2-oxazoline) MH - Mexico|Jalisco MH - Spain PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1352 UR - ISI:000167923600009 L2 - MOLECULAR FRACTIONATION; CRYSTALLINE POLYMERS; RELAXATION PROCESSES; AMORPHOUS REGIONS; CHAIN MOTION; DEUTERON NMR; BLENDS; POLYETHYLENE; COMPLEXES; BEHAVIOR SO - Macromolecular Chemistry and Physics 2001 ;202(5):663-671 3823 UI - 14420 AU - Nurowski P AU - Plebanski JF AD - Univ Warsaw, Inst Fizyki Teoretycznej, PL-00618 Warsaw, PolandCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoNurowski, P, Univ Warsaw, Inst Fizyki Teoretycznej, Ul Hoza 69, PL-00618 Warsaw, Poland TI - Non-vacuum twisting type-N metrics AB - We present a number of results for twisting type-N metrics. (a) A maximally reduced system of equations corresponding to the twisting type-N Einstein metrics is given. When the cosmological constant lambda --> 0 they reduce to the standard equations for the vacuum twisting type Ns. (b) All the metrics which are conformally equivalent to the twisting type-N metrics and which admit three-dimensional conformal group of symmetries are presented. (c) In the Feferman class of metrics an example is given of a twisting type-N metric which satisfies Each's equations but is not Einstein MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000166659500013 SO - Classical and Quantum Gravity 2001 ;18(2):341-351 3824 UI - 13138 AU - O'Dell CR AU - Ferland GJ AU - Henney WJ AD - Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAUniv Kentucky, Dept Phys & Astron, Lexington, KY 40506, USAUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoO'Dell, CR, Vanderbilt Univ, Dept Phys & Astron, Box 1807-B, Nashville, TN 37235 USA TI - Measurement and interpretation of deuterium-line emission in the Orion Nebula AB - We present new observations of the deuterium and hydrogen Balmer lines in the Orion Nebula. There is a real variation in the deuterium-to-hydrogen line ratios across the nebula, being greatest in the emission from the largest proplyd (Orion 244-440). We also present the results of a detailed model for the emission of these lines, the hydrogen lines being the result of photoionization and recombination while the deuterium lines are produced by fluorescent excitation of the upper energy states by the far-UV radiation from theta (1) Ori C. Comparison of the observations and predictions of the line intensities shows good agreement, both in the strength of the reference lines at Hb and also in the differences of the Balmer decrement for the two atoms. The fact that both the deuterium and hydrogen emissions arise from mechanisms that count the near-ultraviolet (deuterium) and photoionizing ultraviolet (hydrogen) photons from the dominant star means that there is little prospect of similar observations being useful for determination of D/H abundances in H II regions MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000170317900021 L2 - ISM : abundances;ISM : general;ISM : individual (Orion Nebula);PHYSICAL CONDITIONS; ABUNDANCE SO - Astrophysical Journal 2001 ;556(1):203-214 3825 UI - 13411 AU - O'Donnell KA AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoO'Donnell, KA, Ctr Invest Cient & Educ Super Ensenada, Dept Appl Phys, POB 434944, San Diego, CA 92143 USA TI - High-order perturbation theory for light scattering from a rough metal surface AB - The angular distribution of the mean diffuse intensity scattered from a metal surface with one-dimensional roughness is studied with perturbation theory. From an approach based on the reduced Rayleigh equations in p polarization, exact perturbation terms up to eighth order in the height parameter are developed for surface roughness consistent with a stationary Gaussian process. The theory is evaluated for a number of cases in which surface plasmon polariton excitation is significant and produces effects such as backscattering enhancement. For surface roughness having a wide Gaussian power spectrum, it is found that the high-order terms lead to roughness-induced broadening of the backscattering peak. For rectangular spectra, two cases are studied in which backscattering effects are due to sixth- and eighth-order terms; both cases provide good comparisons with previously unexplained experimental results. Further, because of an eighth-order term, the diffuse intensity is shown to contain a specular peak that also relies on polariton excitation. This new effect is studied in detail and is found to arise from the constructive interference of contributions produced by multiple-scattering processes, although the time-reversed paths that produce backscattering enhancement are not essential to the specular effect. (C) 2001 Optical Society of America MH - USA MH - Mexico|Baja California PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000169453600011 L2 - BACKSCATTERING ENHANCEMENT; WEAKLY ROUGH; PLASMON-POLARITONS; LOCALIZATION; GRATINGS SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2001 ;18(7):1507-1518 3826 UI - 12894 AU - O'Neills MS AU - Loomis D AU - Aburto VHB AD - Univ N Carolina, Chapel Hill, NC, USAInst Nacl Salud Publ, Cuernavaca, Morelos, Mexico TI - Airborne particles, mortality and socio-economic conditions in Mexico City MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500147 SO - Epidemiology 2001 ;12(4):S37-S37 3827 UI - 13054 AU - Oberhelman RA AU - Flores-Abuxapqui J AU - Suarez-Hoil G AU - Puc-Franco M AU - Heredia-Navarrete M AU - Vivas-Rosel M AU - Mera R AU - Gutierrez-Cogco L AD - Secretaria Salud Mexico, Inst Diagnost & Referencia Epidemiol, Dept Diagnost Bacteriol, Mexico City, DF, MexicoUniv Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Merida, VenezuelaLouisiana State Univ, Med Ctr, New Orleans, LA, USATulane Univ, Sch Publ Hlth & Trop Med, Dept Trop Med, New Orleans, LA, USAOberhelman, RA, Tulane Sch Publ Hlth, Dept Trop Med, 1501 Canal Stn,5th Floor, New Orleans, LA 70112 USA TI - Asymptomatic salmonellosis among children in day-care centers in Merida, Yucatan, Mexico AB - Background. Child day-care centers (DCC) have become common in many lower and middle income countries, presenting new problems that may differ from those of DCC in more developed countries. Diarrhea is a common problem in DCC in the United States, but information on the prevalence of diarrhea or specific enteropathogens among children in DCC in tropical and developing countries is limited. Methods. Because of preliminary data from newborns and DCC attendees in Merida, Mexico, with high rates of Salmonella infection, we conducted a 12-month longitudinal surveillance study of enteropathogens in two Merida DCC. Seventy-eight children ages 2 months to 4 years were evaluated with demographic and clinical data, and stools were cultured monthly. Results. Salmonella sp. was the most common enteropathogen detected (46 of 683 specimens, 6.7%), with higher rates in children younger than 18 months (P < 0.02), but it was found in only 1 of 10 diarrhea episodes that coincided with sampling. Other common organisms identified included Giardia lamblia (21 of 683, 3.0%) and LT-producing enterotoxigenic Escherichia coli (16 of 683, 2.3%). Salmonella was recovered from as many as 19% of children in a single month, but the large multiplicity of serotypes recovered suggested multiple sources rather than a common source outbreak. Children with Salmonella tended to have more liquid stools during the preceding 2 weeks. Salmonella was also isolated from the stool of teachers in 1 of the 2 DCC in 10 of 94 specimens (10.6%), and again multiple serotypes were represented. Conclusion. These data indicate the presence of multiple sources of Salmonella infection in the DCC, posing a complex situation for infection control MH - USA MH - Mexico|Distrito Federal MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000170436400014 L2 - Salmonella infections;Salmonella;child care centers;diarrhea;ACUTE DIARRHEAL DISEASE; TYPHIMURIUM ENTEROTOXIN; RISK; ENTEROPATHOGENS; INFANTS SO - Pediatric Infectious Disease Journal 2001 ;20(8):792-797 3828 UI - 12531 AU - Obrador GT AU - Roberts T AU - St Peter WL AU - Frazier E AU - Pereira BJG AU - Collins AJT AD - Nephrol Analyt Serv, Minneapolis, MN 55404, USATufts Univ New England Med Ctr, Div Nephrol, Boston, MA 02111, USAPanamericana Univ Univ, Sch Med, Mexico City, DF, MexicoUniv Minnesota, Minneapolis, MN, USACollins, AJT, Nephrol Analyt Serv, 914 S 8th St,Suite D-206, Minneapolis, MN 55404 USA TI - Trends in anemia at initiation of dialysis in the United States AB - Background. Anemia almost invariably develops in patients with chronic renal insufficiency (CRI) and is associated with a wide range of complications. The anemia of CRI can be effectively treated with recombinant human erythropoietin (rHuEPO). Recent studies suggest that the management of anemia of CRI is suboptimal in the United States. Methods. We examined the trends in hematocrit and rHuEPO use among all patients who started chronic dialysis therapy between April 1, 1995, and December 31, 1999, from the Endstage Renal Disease Medical Evidence Form 2728 submitted to the Health Care Financing Administration of the United States. Follow-up data containing hematocrit levels after initiation were obtained from the Medicare Part A institutional outpatient dialysis provider claims for 1990 to 1998 prevalent patients. Results. From June 1995 to June 1999, the mean hematocrit at initiation of dialysis increased from 28.1 to 29.3%. Likewise, the annual percentage of patients receiving pre-dialysis rHuEPO increased from 21.8 to 28.1%. Patients receiving predialysis rHuEPO had a higher mean hematocrit than patients without predialysis rHuEPO. The annual percentage of patients with hematocrit <24% fell 6.6% and the percentage with hematocrit 30% increased 9.2%. The trend toward higher hematocrit levels has been consistent across all age, gender, and race categories. Older patients, males, whites, and those who selected peritoneal dialysis had higher hematocrit levels than their counterparts. There were significant geographic differences in the prevalence of predialysis rHuEPO use. Conclusion. There has been a slight improvement in the management of anemia of CRI in the United States. However, a considerable fraction of patients still have hematocrit levels that are significantly lower than the currently recommended target. Furthermore, improvement in the management of anemia could result in improved clinical outcomes among patients with CRI MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 48 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000171764300027 L2 - hematocrit;hemodialysis;chronic renal insufficiency;end-stage renal disease;erythropoietin;left ventricular hypertrophy;LEFT-VENTRICULAR HYPERTROPHY; STAGE RENAL-DISEASE; HEMODIALYSIS-PATIENTS; PREDIALYSIS PATIENTS; ETHNIC-DIFFERENCES; HEMATOCRIT LEVEL; ERYTHROPOIETIN; THERAPY; MORTALITY; FAILURE SO - Kidney International 2001 ;60(5):1875-1884 3829 UI - 13091 AU - Ocampo-Torres FJ AD - CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoCanada Ctr Remote Sensing, Ottawa, ON K1A 0Y7, CanadaOcampo-Torres, FJ, CICESE, Dept Oceanog Fis, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - On the homogeneity of the wave field in coastal regions as determined from ERS-2 and RADARSAT synthetic aperture radar images of the ocean surface AB - Spatial variations of the wave field in coastal waters were determined from images obtained by synthetic aperture radar (SAR) on board the European satellites ERS-1 and 2. The capabilities of RADARSAT SAR to provide useful information for evaluating the wave field variation in nearshore waters are explored. Besides the different polarization between ERS and RADARSAT SARs, range to velocity ratios, signal to noise ratios and the acquisition swath are important issues to take into consideration in comparing the performance of the radar systems. In situ data from a coastal region in the north-west of Baja California are used to validate some of the remote observations and to provide relevant ground truth. Particular aspects of wave phenomena in finite depth waters such as refraction, diffraction and groupiness are considered. An appropriate method for analysing the radar images is applied to describe wave features as they originate from a non-homogeneous process. Wave field characteristics and their spatial variations as resolved by RADARSAT SAR are relevant variables for applications such as beach erosion and coastal management. Inclusion of specific modules to retrieve this type of information should be considered for operational software packages for the use and application of ocean surface data from SAR images. The differences of the two radar systems did not affect their capabilities to observe the wave field in coastal regions MH - Canada MH - Mexico|Baja California PB - BARCELONA: INST CIENCIAS MAR BARCELONA RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0214-8358 UR - ISI:000170284000022 L2 - ocean surface waves;coastal regions;radar images;wave field homogeneity;WAM MODEL; AIRBORNE SO - Scientia Marina 2001 ;65():215-228 3830 UI - 12207 AU - Ochoa J AU - Sheinbaum J AU - Badan A AU - Candela J AU - Wilson D AD - CICESE, Oceanog Fis, Ensenada, Baja California, MexicoNOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149, USAOchoa, J, CICESE, Oceanog Fis, Apdo Postal 2732, Ensenada, Baja California, Mexico TI - Geostrophy via potential vorticity inversion in the Yucatan Channel AB - It has become common practice to measure ocean current velocities together with the hydrography by lowering an ADCP on typical CTD casts. The velocities and densities thus observed are considered to consist mostly of a background contribution in geostrophic balance, plus internal waves and tides, A method to infer the geostrophic component by inverting the linearized potential vorticity (P-V) provides plausible geostrophic density and velocity distributions. The method extracts the geostrophic balance closest to the measurements by minimizing the energy involved in the difference, supposed to consist of P-V-free anomalies. The boundary conditions and the retention of P-V by the geostrophic estimates follow directly from the optimization, which is based on simple linear dynamics and avoids both the use of the thermal wind equation on the measured density, and the classical problem of a reference velocity. By construction, the transport in geostrophic balance equals the measured one. Tides are the largest source of error in the calculation. The method is applied to six ADCP/CTD surveys made across the Yucatan Channel in the springs of 1997 and 1998 and in the winter of 1998-1999. Although the time interval between sections is sometimes close to one inertial period, large variations on the order of 10 percent are found from one section to the next. Transports range from 20 to 31 Sv with a net average close to 25 Sv, consisting of 33 Sv of inflow into the Gulf of Mexico and 8 Sv of outflow into the Caribbean Sea. The highest velocities are 2.0 m sec(-1) into the Gulf of Mexico near the surface on the western side of the channel, decreasing to 0.1 m sec(-1) by 400 to 500 m depth. Beneath the core of the Yucatan Current a countercurrent, with speeds close to 0.2 m sec(-1) and an average transport of 2 Sv, hugs the slopes of the channel from 500 to 1500 m depth. Our data show an additional 6 Sv of return flow within the same depth range over the abrupt slope near Cuba, which is likely to be the recirculating fraction of the Yucatan Current deep extention, unable to outflow through the Florida Straits. The most significant southerly flows do not occur in the deepest portion of the channel, but at depths around 1000 m MH - Mexico|Baja California MH - USA PB - NEW HAVEN: KLINE GEOLOGY LABORATORY RP - NOT IN FILE U3 - TC 21 U4 - Oceanography U5 - J;Article AV - English IS - 0022-2402 UR - ISI:000172709700003 L2 - CALIFORNIA CURRENT; ADCP MEASUREMENTS; OMEGA-EQUATION; LOOP CURRENT; CIRCULATION; VELOCITY; OCEAN; FLOW; GULF; SEA SO - Journal of Marine Research 2001 ;59(5):725-747 3831 UI - 14152 AU - Ogorodnikova NA AU - Mitnik DG AD - AN Nesmeyanov Organoelement Cpds Inst, Moscow 117813, RussiaCIMAV, Dept Polimeros, Chihuahua 31109, Chih, MexicoOgorodnikova, NA, AN Nesmeyanov Organoelement Cpds Inst, Vavilov Str 28, Moscow 117813, Russia TI - Ab initio study of the additivity concept applied for the effects of one substituent within cyclic compounds AB - A comparative analysis of the electron density distributions derived from ab initio calculations at the B3LYP/6-31G(**)//B3LYP/6-31G(**) and RHF/6-31G(**)//RHF/3-21G(**) levels in the framework of the Mulliken population approach has been carried out for a number of carbon core conjugated compounds (benzene, cyclopentadienyl anion, cycloheptatrienyl cation, butadiene, cyclopentadiene, hexatriene, pentadienyl anion,heptatrienyl cation, and their monosubstituted derivatives RX, where X is NH2, OH, F, Me, CHO, CN, NO, or NO2), changes in the effective atomic charges due to substitution in the molecules being examined. The response of cyclic compounds to substitution has been explained in the framework of the additivity concept applied for two effects of one substituent within cyclic molecules, namely, a substituent effect on a non-ipso atom of a monosubstituted cyclic compound has been treated as a sum of two substituent effects arriving at the atom from the substituent via two opposite sides of the cyclic chain. Both ab initio methods, the B3LYP and RHF ones, at the same (6-31G(**)) basis set level represent the additivity of effects of one substituent within cyclic compounds alike. The ab initio study of the influence of electron correlation on the electron density distributions of unsaturated compounds has shown that at the same (6-31G(**)) basis set level in the framework of the Mulliken population approach the changes in the pi, sigma, or total electron density distributions due to substitution in unsaturated compounds for the B3LYP and RHF calculations are the same (with an accuracy of the proportionality coefficients). The inclusion of electron correlation by using the B3LYP method was found to lead to greater variations of the pi substituent charge changes than of the sigma ones as compared with the RHF data. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Chihuahua MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000167346700029 L2 - ab initio B3LYP and RHF calculations;electron density distributions;unsaturated hydrocarbons;substituent effects;additivity concept;effect of electron correlation on the electron density distribution;PROTON AFFINITIES; THEORETICAL APPROACH; BENZENES; IONS; FEATURES; CHARGE SO - Journal of Molecular Structure-Theochem 2001 ;538():267-285 3832 UI - 12184 AU - Ohlsson J AU - Villarreal G AU - Sjostrom A AU - Abrahamsson M AU - Sjostrand J AD - Univ Gothenburg, Inst Clin Neurosci, Dept Ophthalmol, Gothenburg, SwedenUniv Autonoma Nuevo Leon, Dept Ophthalmol, Monterrey, MexicoOhlsson, J, SU Molndal, Dept Ophthalmol, SE-43180 Molndal, Sweden TI - Visual acuity, residual amblyopia and ocular pathology in a screened population of 12-13-year-old children in Sweden AB - Purpose: To establish the distribution of visual acuity and the prevalence of residual amblyopia and other ocular disorders in a vision-screened population group of 12-13-year-old children. Methods: In total 1046 children were examined in a field study in Sweden. The examination included visual acuity, stereopsis, cover testing, red reflex, refractive retinoscopy and examination of the posterior pole. In selected cases VEP was also performed. Results: Visual acuity greater than or equal to1.0 in at least one eye was present in 98% of cases. Residual amblyopia (less than or equal to0.5) was found in 1.1% of the population. Manifest strabismus was found in 2.7%. There were only a small number of ocular opacities and posterior pole abnormalities. Ocular albinism was found in 7 cases: In 15 children the cause of subnormal VA was unexplained. Conclusion: Results for visual acuity, residual amblyopia and other ocular disorders are very similar to previous Nordic, vision-screened populations MH - Mexico|Nuevo Leon MH - Sweden PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 17 U4 - Ophthalmology U5 - J;Article AV - English IS - 1395-3907 UR - ISI:000172760400009 L2 - amblyopia;visual acuity;vision screening;child;human;treatment outcome;Sweden/epidemiology;REFRACTIVE ERROR; CYCLOPLEGIA; DISORDERS SO - Acta Ophthalmologica Scandinavica 2001 ;79(6):589-595 3833 UI - 12505 AU - Ohlsson J AU - Villarreal G AU - Abrahamsson M AU - Cavazos H AU - Sjostrom A AU - Sjostrand J AD - Univ Gothenburg, Inst Clin Neurosci, Dept Ophthalmol, Gothenburg, SwedenUniv Autonoma Nuevo Leon, Dept Ophthalmol, Monterrey, MexicoOhlsson, J, SU Molndal, Dept Ophthalmol, SE-43180 Molndal, Sweden TI - Screening merits of the Lang II, Frisby, Randot, Titmus, and TNO stereo tests AB - Purpose: Previous works show a pronounced disagreement on the reliability of stereo tests as screening tools for amblyopia and strabismus. This study's aim was to compare the ability of the Lang II, Frisby, Randot, Titmus, and TNO stereo tests to detect amblyopia and strabismus with visual acuity testing and cover testing. Methods. A total of 1035 school children aged 12 to 13 years were examined in a field study in Monterrey, Mexico. In addition to the 5 stereo tests, the examination included visual acuity, cover testing, refraction (skiascopy), and inspection of the red reflex and posterior pole. Results. Sensitivity ranged from 17% to 47% (Frisby-Titmus-Lang II-Randot-TNO, in order of occurrence). Of the 60 subjects with strabismus and/or amblyopia, only 8 subjects were identified by all 5 stereo tests. A considerable number of subjects (25), the majority of whom were amblyopic (23 subjects), were not identified by any of the tests. All stereo tests showed higher sensitivities for strabismus than for amblyopia. Conclusion: None of the 5 stereo tests studied is suitable for screening for amblyopia or strabismus. The results of both ocularly normal subjects and subjects with strabismus and/or amblyopia are variable, and there is no way of separating normal response from abnormal response MH - Mexico|Nuevo Leon MH - Sweden PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 8 U4 - Ophthalmology;Pediatrics U5 - J;Article AV - English IS - 1091-8531 UR - ISI:000171925700010 L2 - RANDOM-DOT-E; YOUNG-CHILDREN; AMBLYOPIA SO - Journal of Aapos 2001 ;5(5):316-322 3834 UI - 12388 AU - Olascoaga MJ AD - CICESE, Dept Oceanog Fis, Ensenada, Baja California, MexicoOlascoaga, MJ, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Deep ocean influence on upper ocean baroclinic instability AB - Reduced gravity models, namely, those having an active layer of fluid floating on top of a motionless one, have been largely used to study the upper ocean. This approximation is formally valid when the total ocean depth tends to infinity. The effect of a finite ocean depth on the upper ocean baroclinic instability is examined here using a quasi-geostrophic three-layer model and comparing the results with those obtained using a reduced gravity quasi-geostrophic two-layer model or 2.5-layer model. The basic state is a zonal current with uniform velocities within each layer. The ratio epsilon between the sum of the upper two layers mean depths and the lower layer mean depth is the relevant new parameter of the problem. Even for very small values of epsilon, important differences between the 2.5-layer (epsilon = 0) and the three-layer (epsilon > 0) model are found. As epsilon increases, the region of Arnold stable states decreases. For certain basic states, new normal mode instability branches axe found, whose growth rates increase with epsilon. An asymptotic expansion in epsilon is made in order to shed some light on the transition regime between both models. This allows one to interpret the new instabilities as a consequence of the resonant interplay between the stable modes in the 2.5-layer model and a short Rossby wave in the deep layer. The growth rates of the new instability branches are O(epsilon (1/3)) and O(epsilon (1/2)) and cannot be neglected even for reasonably small values of epsilon MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000172105300006 L2 - 2-LAYER MODEL; NONLINEAR SATURATION; 3-LAYER MODEL; FREE-BOUNDARY; LAYER; FLOWS; PROPAGATION; STABILITY; WAVES SO - Journal of Geophysical Research-Oceans 2001 ;106(C11):26863-26877 3835 UI - 13840 AU - Oldham N AU - Nelson T AU - Bergeest R AU - Ramm G AU - Carranza R AU - Corney AC AU - Gibbes M AU - Kyriazis G AU - Laiz HM AU - Liu LX AU - Lu Z AU - Pogliano U AU - Rydler KE AU - Shapiro E AU - So E AU - Temba M AU - Wright P AD - NIST, Div Elect, Elect & Elect Engn Lab, Technol Adm, Gaithersburg, MD 20899, USAPhys Tech Bundesanstalt, D-3816 Braunschweig, GermanyCENAM, Queretaro 76900, MexicoInd Res Ltd, Measurement Stand Lab New Zealand, Lower Hutt, New ZealandCSIRO, Natl Measurement Lab, Lindfield, NSW 2070, AustraliaNatl Inst Metrol, INMETRO, BR-25250020 Rio De Janeiro, BrazilINTI, RA-1650 San Martin, ArgentinaSingapore Product & Stand Board, Natl Measurement Ctr, Singapore, SingaporeNIM, Beijing 100013, Peoples R ChinaIst Elettrotecn Nazl Galileo Ferraris, I-10135 Turin, ItalySP Swedish Natl Testing & Res Inst, SE-50115 Boras, SwedenDI Mendeleyev Inst Metrol, St Petersburg 198005, RussiaNatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, CanadaCSIR, Natl Metrol Lab, ZA-0001 Pretoria, South AfricaNatl Phys Lab, Teddington TW11 0LW, Middx, EnglandOldham, N, NIST, Div Elect, Elect & Elect Engn Lab, Technol Adm, Gaithersburg, MD 20899 USA TI - An international comparison of 50/60 Hz power (1996-1999) AB - An international comparison of 50/60 Hz power is described. The traveling standard was an electronic power transducer that was tested at 120 V, 5 A, 53 Hz, at five power factors (1.0, 0.5, and 0.0). Fifteen National Metrology Institutes (NMIs) from six metrology regions participated in the comparison MH - Argentina MH - Australia MH - Brazil MH - Canada MH - United Kingdom MH - Germany MH - Italy MH - USA MH - Mexico|Queretaro MH - New Zealand MH - Peoples R China MH - Russia MH - Singapore MH - South Africa MH - Sweden PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0018-9456 UR - ISI:000168233200048 L2 - TRANSFER STANDARD; FREQUENCIES; COMPARATOR; SYSTEM; ENERGY SO - Ieee Transactions on Instrumentation and Measurement 2001 ;50(2):356-360 3836 UI - 13360 AU - Oleszczuk JJ AU - Cervantes A AU - Kiely JL AU - Keith DM AU - Keith LG AD - Northwestern Univ, Sch Med, Dept Obstet & Gynecol, Chicago, IL 60611, USANorthwestern Univ, Sch Med, Ctr Study Multiple Birth, Chicago, IL 60611, USAUniv Cincinnati, Med Ctr, Cincinnati, OH 45267, USACtr Invest Docencia Econ, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Cambridge, MA 02138, USAPolish Mothers Mem Hosp, Dept Maternal Fetal Med, Lodz, PolandMed Univ Lublin, Dept Obstet & Perinatal, Lublin, PolandKeith, LG, Northwestern Univ, Sch Med, Dept Obstet & Gynecol, 333 E Super St, Chicago, IL 60611 USA TI - Maternal race/ethnicity and twinning rates in the United States, 1989-1991 AB - OBJECTIVE: To utilize United States birth certificate data (years 1989-1991) to examine the effects of race/ethnicity on twinning rates. STUDY DESIGN: We used a database of birth certificate data for the United States (years 1989-1991) available on CD-ROM from the United States National Center for Health Statistics. This linked birth/infant death data set included a total of 12,036,234 birth records, of which 279,073 were twins. Excluded from the analysis were 15,086 twin birth records (5.4%) based upon previously described exclusion criteria. Statistical analysis included a series of univariate analyses to determine the rates of twinning between different racial/ethnic groups correlated with maternal age, education, marital status and place of birth. Comparisons were analyzed using the chi (2) test, with significance at P <.05. RESULTS: The overall twinning rate was 2.26%, with the lowest rate observed in the group denoted non-Hispanic other (1.67%) and highest among non-Hispanic blacks (2.69%). Twinning rates within various groups representing Hispanics ranged from 1.76% to 2.08%. The twinning rate was significantly higher among U.S.-born as compared to non-U.S.-born women (2.34% vs. 2.88%, P<.005) except far Puerto Ricans, Cubans and Central/South Americans ,for whom the reverse was true, Women aged 35-39 had the highest twinning rate (3.05%), whereas women aged 15-19 had the lowest; that trend persisted in all racial/ethnic groups. The study showed a nonsignificant relationship between marital status or education and twinning rate. CONCLUSION: Race/ethnicity studies can be useful in designing programs that may maximize health outcomes of twins in a racially diverse population MH - USA MH - Mexico|Distrito Federal MH - Poland PB - ST LOUIS: SCI PRINTERS & PUBL INC RP - NOT IN FILE U3 - TC 8 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0024-7758 UR - ISI:000169584700002 L2 - twin studies;race;ethnic groups;MULTIPLE BIRTHS; RACE; RISK SO - Journal of Reproductive Medicine 2001 ;46(6):550-557 3837 UI - 13169 AU - Olguin-Ortega L AU - Barile-Fabris L AU - Espinoza LR AD - Hosp Especialidades CM La Raza, Mexico City 02990, DF, MexicoLouisiana State Univ, Med Ctr, New Orleans, LA 70112, USAOlguin-Ortega, L, Hosp Especialidades CM La Raza, Mexico City 02990, DF, Mexico TI - Catastrophic antiphospholipid syndrome: Need for a reappraisal MH - Mexico|Distrito Federal MH - USA PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Letter AV - English IS - 0315-162X UR - ISI:000170254700039 SO - Journal of Rheumatology 2001 ;28(8):1934-1934 3838 UI - 12763 AU - Olivares-Robles MA AU - Ulloa SE AD - Ohio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAOlivares-Robles, MA, Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Interaction potential between dynamic dipoles: Polarized excitons in strong magnetic fields AB - The interaction potential of a two-dimensional system of excitons with spatially separated electron-hole layers is considered in the strong magnetic field limit. The excitons are assumed to have free dynamics in the x-y plane, while being constrained or "polarized" in the z direction. The model simulates semiconductor double layer systems under strong magnetic field normal to the layers. The residual interaction between excitons exhibits interesting features, arising from the coupling of the center-of-mass and internal degrees of freedom of the exciton in the magnetic field. This coupling induces a dynamical dipole moment proportional to the center-of-mass magnetic moment of the exciton. We show the explicit dependence of the interexciton potential matrix elements, and discuss the underlying physics. The unusual features of the interaction potential would be reflected in the collective response and nonequilibrium properties of such system MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000171136700066 L2 - COUPLED QUANTUM-WELLS; DIELECTRIC FUNCTION; ELECTRONS; SYSTEMS; CONDENSATION; TRANSITIONS; BOSONS; HOLES; STATE SO - Physical Review B 2001 ;6411(11): 3839 UI - 12623 AU - Olivas A AU - Samano EC AU - Fuentes S AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoOlivas, A, Univ So Calif, Dept Chem, SSC 617,920W,37th St, Los Angeles, CA 90089 USA TI - Hydrogenation of cyclohexanone on nickel-tungsten sulfide catalysts AB - Unsupported Ni-W sulfide catalysts were tested for cyclohexanone hydrogenation under atmospheric pressure conditions and showed a high selectivity towards cyclohexene. They were prepared employing ammonium thiotungstate complexes and nickel nitrate as metal-sulfide precursors. The data of catalytic activity show a synergetic effect as a function of stoichiometric composition, R = Ni/(Ni + W). A maximum synergetic effect occurred at R = 0.7. The texture and surface composition characterization of the catalysts were carried out by BET surface area measurements, AES and XPS. The surface of catalysts was found to be nickel deficient, compared to the nominal values, as determined by AES and XPS. The electronic state of Ni changed as the catalyst stoichiometry varied, but the electronic state of W did not change. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000171614000028 L2 - nickel-tungsten sulfide;WS2;cyclohexanone;cyclohexene;hydroprocessing;heterocompounds;hydrodesulfuration;hydrodenitrogenation;hydrodeoxygenation;heteroatoms;hydrotreating;ammonium thiotungstate;ammonium metatungstate;thiosalt;Ni-S (millerite);MO HYDRODESULFURIZATION CATALYSTS; CRYSTALLINE PHASES; PROMOTER; ALUMINA; CO SO - Applied Catalysis A-General 2001 ;220(1-2):279-285 3840 UI - 13159 AU - Omenetto FG AU - Taylor AJ AU - Moores MD AU - Arriaga J AU - Knight JC AU - Wadsworth WJ AU - Russell PSJ AD - Univ Calif Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545, USAUniv Florida, Dept Phys, Gainesville, FL 32611, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Bath, Dept Phys, Bath BA2 7AY, Avon, EnglandOmenetto, FG, Univ Calif Los Alamos Natl Lab, Div Mat Sci & Technol, MST-10,MS K764, Los Alamos, NM 87545 USA TI - Simultaneous generation of spectrally distinct third harmonics in a photonic crystal fiber AB - By coupling femtosecond pulses at lambda = 1.55 mum in a short length (Z = 95 cm) of photonic crystal fiber, we observe the simultaneous generation of two visible radiation components. Frequency-resolved optical gating experiments combined with analysis and modal simulations suggest that the mechanism for their generation is third-harmonic conversion of the fundamental pulse and its split Raman self-shifted component. (C) 2001 Optical Society of America MH - United Kingdom MH - Mexico|Puebla MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 41 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000170140900014 L2 - MODE OPTICAL-FIBER; MU-M; PULSES SO - Optics Letters 2001 ;26(15):1158-1160 3841 UI - 12584 AU - Ondarza-Rovira R AU - Boyd TJM AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Essex, Dept Phys, Colchester CO4 3SQ, Essex, EnglandOndarza-Rovira, R, Inst Nacl Invest Nucl, Apartado Postal 18-1027, Mexico City 11801, DF, Mexico TI - Harmonic radiation emission from periodic lattices irradiated by short-pulse elliptically polarized laser light AB - Radiated emission at high-order harmonic numbers is observed from thin crystalline layers irradiated by short femtosecond elliptically polarized laser light. The applied external radiation field drives the free electrons in the material to large oscillation amplitudes and harmonics are generated by the electronic response to the periodic lattice potential. A model was modified by introducing a more general expression for the lattice force that by sharpening or by smoothing the potential in turn allows the strength of the electronic perturbation to be varied. The electron motion is computed numerically by solving the electromagnetic force equation and by regarding the lattice potential as a perturbative source. For linearly polarized laser light the radiation spectra are characterized by emission lines forming a flat plateau in the region of low harmonic orders with a sharp cutoff for higher numbers. For circular polarization strong emission is found for two harmonic numbers, the first in the low-harmonic region and the second around the cutoff. By solving analytically the electron motion in an elliptically polarized laser field, an exact expression for the electron displacement in all three spatial directions is found. The amplitude of the oscillations sets the analytic form for calculating the peak harmonic numbers emitted from the laser-lattice interaction. The radiation effect studied here, if detected, might hold some potential as a diagnostic and could be used, in principle, as a method for determining the lattice parameter in crystalline structures MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171649100095 L2 - GENERATION; PLASMA; SURFACES; DYNAMICS SO - Physical Review e 2001 ;6404(4): 3842 UI - 14159 AU - onso-Azcarate J AU - Bottrell SH AU - Tritlla J AD - Univ Castilla La Mancha, Fac Ciencias Medio Ambiente Fabrica Armas, Toledo 45007, SpainUniv Leeds, Dept Earth Sci, Leeds LS2 9JT, W Yorkshire, EnglandUniv Nacl Autonoma Mexico, Inst Geol, Circuito Invest Cientif, Mexico City 04510, DF, MexicoAlonso-Azcarate, J, Univ Castilla La Mancha, Fac Ciencias Medio Ambiente Fabrica Armas, Toledo 45007, Spain TI - Sulfur redox reactions and formation of native sulfur veins during low grade metamorphism of gypsum evaporites, Cameros Basin (NE Spain) AB - Vein deposits containing native sulfur, gypsum, quartz and rare sphalerite are described from Cervera del Rio Alhama, in the very low-grade metasediments of the Mesozoic Cameros Basin of NE Spain. The veins are hosted by lacustrine evaporites which comprise alternations of dolomite and gypsum (anhydrite during metamorphism) layers. Fluid inclusion homogenization temperatures and quartz-sulfate oxygen isotope geothermometry indicate formation of the Veins at approximate to 225 degreesC. Fluid inclusions contain S degrees along with a gas phase comprising H2S, N-2, CO2 and minor CH4. These are all likely reactants and products of S degrees generation by thermochemical sulfate reduction (TSR) by organic matter, followed by partial re-oxidation of some H2S by SO42- to produce S degrees. TSR-type reactions during low grade metamorphism are thus concluded to be the origin of the So veins. The TSR reactions we described differ from those observed in most petroleum-related sour gas settings. Firstly, there is no evidence for secondary carbonate precipitation. Secondly, significant S isotopic fractionations exist between sulfate (around + 20(parts per thousand)) and reduced products (S degrees is around - 11%). This is attributed to relatively increased rates of isotopic equilibration compared to TSR that may be related to low availability of organic matter during the formation. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000167488600002 L2 - native sulfur;low-grade metamorphism;H2S-rich fluids;redox reactions;thermochemical sulfate reduction (TSR);Cameros Basin (Spain);THERMOCHEMICAL SULFATE REDUCTION; CARBONATE GAS-RESERVOIRS; PYRITE DEPOSITS; OXYGEN ISOTOPES; GEOTHERMOMETRY; ANHYDRITE; WATERS SO - Chemical Geology 2001 ;174(4):389-402 3843 UI - 13861 AU - Orford J AU - Natera G AU - Velleman R AU - Copello A AU - Bowie N AU - Bradbury C AU - Davies J AU - Mora J AU - Nava A AU - Rigby K AU - Tiburcio M AD - Univ Birmingham, Sch Psychol, Birmingham B15 2TT, W Midlands, EnglandNo Birmingham Mental Hlth Care NHS Trust, Birmingham, W Midlands, EnglandMatthews Ctr, Community Alcohol Team, Birmingham, W Midlands, EnglandInst Mexicano Psiquiatria, Mexico City 22, DF, MexicoAvon & Wiltshire Mental Hlth Partnership NHS Trus, Mental Hlth R&D Unit, Bath, Avon, EnglandUniv Bath, Bath BA2 7AY, Avon, EnglandDrug Prevent Advisory Serv, Manchester, Lancs, EnglandOrford, J, Univ Birmingham, Sch Psychol, Birmingham B15 2TT, W Midlands, England TI - Ways of coping and the health of relatives facing drug and alcohol problems in Mexico and England AB - Aims. To compare two contrasting socio-cultural groups in terms of parameters relating to the stress-coping-health model of alcohol, drugs and the family, and to test hypotheses derived from the model in each of the two groups separately. Design. Cross-sectional, comparative and correlational, using standard questionnaire data, supplemented by qualitative interview data to illuminate the findings. Participants. One hundred close relatives, mainly partners or parents, from separate families in Mexico City, and 100 from South West England. Data sources. Coping Questionnaire (CQ), Family Environment Scale (FES), Symptom Rating Test (SRT), Semi-structured interview. Findings. Mean symptom scores were high in both groups, and not significantly different. The hypothesis that relatives in Mexico City, a more collectivist culture, would show more tolerant-inactive coping was not supported, but there was support for the prediction that relatives in South West England would show more withdrawal coping. This result may be as much due to differences in poverty and social conditions as to differences in individualism-collectivism. As predicted by the stress-coping-health model, tolerant-inactive coping was correlated with symptoms, in both groups, after controlling for family conflict, but there was only limited support for a moderating role of coping. Wives of men with alcohol problems in Mexico City, and wives of men with other drug problems in South West England, reported particularly high levels of both engaged and tolerant-inactive coping. Conclusions. Tolerant-inactive coping may be bad for relatives' health: causality may be inferred but is not yet proved. Certain groups are more at risk of coping in this way. Qualitative data help understand the nature of tolerant-inactive coping and why it occurs despite the view of relatives themselves that it is counter-productive MH - United Kingdom MH - Mexico|Distrito Federal PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 20 U4 - Substance Abuse;Psychiatry U5 - J;Article AV - English IS - 0965-2140 UR - ISI:000168312800011 L2 - FAMILY; COMMUNITY; VIOLENCE; DRINKING; GENDER SO - Addiction 2001 ;96(5):761-774 3844 UI - 13560 AU - Orjuela M AU - Orlow I AU - Dudas M AU - Ponce-Castaneda MV AU - Ridaura C AU - Leal C AU - Salazar A AU - Abramson D AU - Gerald W AU - Cordon-Cardo C AD - Mem Sloan Kettering Canc Ctr, Dept Pathol, New York, NY 10021, USAColumbia Univ, Dept Pediat, New York, NY 10027, USAColumbia Univ, Sch Publ Hlth, New York, NY 10027, USAUniv Autonoma Mexico, Inst Fisiol Celular, Mexico City, DF, MexicoIst Nacl Pediat, Dept Pathol, Mexico City, DF, MexicoIst Nacl Pediat, Dept Pediat, Mexico City, DF, MexicoIst Nacl Pediat, Dept Ophthalmol, Mexico City, DF, MexicoCornell Univ, Med Ctr, Dept Ophthalmol, New York, NY 10021, USACordon-Cardo, C, Mem Sloan Kettering Canc Ctr, Dept Pathol, 1275 York Ave, New York, NY 10021 USA TI - Alterations of cell cycle regulators affecting the RB pathway in nonfamilial retinoblastoma AB - We undertook the present study to examine alterations affecting the RE pathway in the G1 checkpoint and to determine their potential clinical significance in children affected with nonfamilial retinoblastoma, Using immunohistochemistry, patterns of expression of pRB, p16/INK4A, and E2F1 were analyzed in tissue from a cohort of 86 well-characterized patients with nonfamilial retinoblastoma diagnosed at the "Instituto Nacional de Pediatria" in Mexico City. The relationship of these phenotypes to proliferative index was assessed by analysis of Ki67 antigen expression. pRB expression was found in 11 (13%) cases. Using a hypophosphorylated specific pRB antibody, we observed low levels of underphosphorylated pRS expression in only 1 of 9 evaluable positive cases. These data suggest that the detected pRB products were hyperphosphorylated and thus had decreased functional activity. Increased p16 nuclear expression was found in only 6 tumors. No tumors showed deletions or mobility shifts of the INK4A gene. Undetectable pRB levels were significantly associated with undetectable p16 expression (odds ratio, 10.8; 95% confidence interval, 1.4-81.3; P = .03). All tumors showed nuclear immunoreactivities for E2F1 and Ki67, Increased Ki67 proliferative index was associated with increased staining for E2F1 (r = .44; P = .008) and increasing clinical stage (P = .03), Among children with unilateral disease, the mean Ki67 proliferative index was significantly higher in children with advanced clinical disease (stages 3 and 4) (mean 81.25; SD 6.78) than in those with earlier stage disease (mean 69.50; SD 9.45) (P = 0.001). Among children with bilateral disease, however, the mean proliferative index was not significantly higher for children with advanced clinical stage. When examining all cases together, there was a significant trend toward increasing proliferative index with increasing clinical stage (P = .03). In unilateral tumors, we also found that presence of detectable pRB was associated with a lower percentage of cells expressing E2F1 (46.1% nu 70.8%) (P = 0.05), whereas there was no association between presence of pRB and E2F1 among bilateral tumors. We have found that expression of some of the cell cycle markers examined varies according to laterality, suggesting underlying differences in the capacity for cell cycle regulation between these 2 forms of the disease. Differences in capacities for cell cycle regulation may account for some differences in clinical behavior. Thus, the inclusion of molecular markers may become useful adjuncts to clinicopathological staging and subsequent determination of therapy. Copyright (C) 2001 by W.B. Saunders Company MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 3 U4 - Pathology U5 - J;Article AV - English IS - 0046-8177 UR - ISI:000169049200013 L2 - retinoblastoma;p16;E2F;immunohistochemistry;SOFT-TISSUE SARCOMAS; PROLIFERATION INDEX; PROTEIN EXPRESSION; P16; GENE; DIAGNOSIS; SURVIVAL; CANCER; P53; CORRELATE SO - Human Pathology 2001 ;32(5):537-544 3845 UI - 13946 AU - Orlov Y AU - Acho L AD - IPN, Ctr Invest & Desarrollo Technol Digital, Tijuana, BC, MexicoUniv Autonoma Baja California, Fac Ingn, Ensenada, Baja California, MexicoOrlov, Y, Sci Res & Adv Studies Ctr, CICESE, Dept Elect & Telecommun, San Diego, CA USA TI - Nonlinear H-infinity-control of time-varying systems: A unified distribution-based formalism for continuous and sampled-data measurement feedback design AB - Nonlinear H-infinity-controller synthesis is presented for time-varying systems via sampled-data measurement feedback. The H-infinity-control problem for a nonlinear system with a sampled-data measurement output is shown to be equivalent to the H-infinity-control problem for a certain nonlinear system with a time-continuous measurement output. Special mathematical tools are developed to straightforwardly derive a local solution of the sampled-data measurement feedback (SMF) H-infinity-control problem from that of the time-continuous measurement feedback. (CRLF) H-infinity-control problem MH - USA MH - Mexico|Baja California PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000168061600014 L2 - H-infinity control;nonlinear systems;output feedback;sampled-data filters;time-varying systems SO - Ieee Transactions on Automatic Control 2001 ;46(4):638-643 3846 UI - 12187 AU - Oropeza-Hernandez LF AU - Sierra-Santoyo A AU - Cebrian ME AU - Manno M AU - Albores A AD - IPN, Ctr Invest & Estudios Avanzados, Secc Toxicol, Mexico City 07360, DF, MexicoUniv Padua, Ist Med Lavoro, I-35128 Padua, ItalyAlbores, A, IPN, Ctr Invest & Estudios Avanzados, Secc Toxicol, Mexico City 07360, DF, Mexico TI - Ovariectomy modulates the response of some cytochrome P450 isozymes to lindane in the rat AB - The effect of 0, 1, 5, 25 and 50 mg/kg body weight (b.w.) lindane, administered in corn oil by gavage, on cytochrome P450 (CYP) phenotype was investigated in the liver of ovariectomized (ovx), sham operated (sham-ope) and nonovariectomized (n/ovx) adult Wistar rats. Total hepatic microsomal CYP content and the O-dealkylation of 7-ethoxy- (EROD), 7-methoxy- (MROD), 7-pentoxy- (PROD) and 7-benzyloxy-resorufin (BROD) were assayed. In addition, CYP1A1, 2B1/2B2, 2C11 and 3A2 proteins were determined by western blot using specific anti-rat antibodies. Protein bands were visualised by chemiluminescence and their intensities were compared among groups. A statistically significant, dose-dependent increase of all parameters studied was observed in all three animal groups after lindane administration. Ovx rats, however, responded differently to lindane administration than n/ovx or sham-ope animals. At the highest doses in ovx rats, the relative liver weight was more increased and the total CYP content was less increased than in n/ovx or sham-ope animals. Moreover, the degree of induction of PROD and BROD activities was higher and that of EROD activity was lower in ovx than in either n/ovx or sham-ope animals. Accordingly, CYP2B1/2B2 protein showed the largest increase in ovx rats, whereas CYP1A protein increased more in n/ovx or sham-ope animals. CYP2C11, a cytochrome predominantly expressed in males, was also more strongly induced in ovx than in n/ovx or sham-ope animals. CYP3A2 was slightly expressed in ovx but not in n/ovx non-treated rats, although the effect of induction was clearly greater in the latter. These results, overall, indicate that ovariectomy significantly affects, both qualitatively and quantitatively, CYP expression following induction by lindane and support the anti-estrogenic effect of lindane in rats. The pathophysiological and toxicological relevance of liver CYP induction by lindane and possibly other organochlorine xenobiotics in females with a lack or deficiency of estrogen supply remains to be investigated. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Toxicology U5 - J;Article AV - English IS - 0378-4274 UR - ISI:000172667200010 L2 - CYP;lindane;ovariectomy;PHENOBARBITAL INDUCTION; LIVER MICROSOMES; FEMALE RATS; EXPRESSION; SEX; METABOLISM SO - Toxicology Letters 2001 ;124(1-3):91-99 3847 UI - 13128 AU - Orozco-Lugo AG AU - McLernon DC AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Ingn Elect, Secc Comunicac, Mexico City 07660, DF, MexicoUniv Leeds, Sch Elect & Elect Engn, Inst Integrated Informat Syst, Leeds LS2 9JT, W Yorkshire, EnglandOrozco-Lugo, AG, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Ingn Elect, Secc Comunicac, Av IPN 2508, Mexico City 07660, DF, Mexico TI - Blind ISI and MAI cancellation based on periodically time-varying transmitted power AB - For multiple transmitters. with over-sampling and multiple antennas at the receiver, an algorithm is presented to achieve bad mitigation of both intersymbol interference (IST) and multiple access interference (IMAI) by selectively periodically varying the transmitted power of each user. In addition, the permutation ambiguity of many source separation algorithms is overcome MH - United Kingdom MH - Mexico|Distrito Federal PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000170317700038 SO - Electronics Letters 2001 ;37(15):984-986 3848 UI - 14427 AU - Ortega-Larrocea MP AU - Siebe C AU - Becard G AU - Mendez I AU - Webster R AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Toulouse 3, F-31326 Castanet Tolosan, FranceUniv Nacl Autonoma Mexico, IIMAS, Mexico City 04510, DF, MexicoRothamsted Expt Stn, Harpenden AL5 2JQ, Herts, EnglandOrtega-Larrocea, MP, Univ Nacl Autonoma Mexico, Inst Geol, Apartado Postal 70-296, Mexico City 04510, DF, Mexico TI - Impact of a century of wastewater irrigation on the abundance of arbuscular mycorrhizal spores in the soil of the Mezquital Valley of Mexico AB - Phosphorus (P) and heavy metals introduced into soil by irrigating with sewage effluent can affect the soil's microflora and, in particular, the abundance of arbuscular mycorrhizal fungi. We have studied the effect in the Mezquital Valley of Mexico, on two kinds of soil Leptosol and Vertisol) after both short-term (5 years) and long-term (90 years) irrigation. We did so by replicated sampling of all four combinations of soil type and length of irrigation and then estimating the main effects and interactions by analysis of variance. Both kinds of soil appear to have accumulated large quantities of P and heavy metals as a result of the irrigation so that concentrations have approximately doubled and now approach the thresholds for healthy soil. The differences between soil types were comparatively small. Phosphorus was the only element for which there was an interaction between soil type and time under irrigation. The Leptosol contained more spores than the Vertisol, irrespective of the length of the irrigation, and both types contained significantly fewer spores after 90 years of irrigation than after only 5 years. The effect was more evident in Vertisols. Zn contrast, the sporocarpic morphotypes seemed unaffected by the accumulated phosphorus and metals. The sporocarps of Glomus mosseae were twice as abundant in the Leptosol as in the Vertisol, but those of Sclerocystis were equally prevalent in the two types of soil. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Soil Science U5 - J;Article AV - English IS - 0929-1393 UR - ISI:000166694400006 L2 - arbuscular mycorrhiza;vertisol;leptosol;phosphorus;heavy metals;sewage effluent;LONG-TERM IRRIGATION; HEAVY-METAL; POLLUTED SOILS; TAMIL-NADU; FUNGI; INDIA; BIOAVAILABILITY; COMMUNITIES; PHOSPHORUS; DIVERSITY SO - Applied Soil Ecology 2001 ;16(2):149-157 3849 UI - 13308 AU - Ortega-Morales BO AU - Lopez-Cortes A AU - Hernandez-Duque G AU - Crassous P AU - Guezennec J AD - Univ Autonoma Campeche, CIET, Lab Microbiol Ambiental & Biotecnol, Campeche 24030, Mexico. CIBNOR, Lab Ecol & Biotecnol Microbiana, La Paz, Baja Calif Sur, Mexico. Univ Mayab, Fac Ingn, Merida 97310, Yucatan, Mexico. IFREMER, DRO, Dept Environm Profond, F-29280 Plouzane, France. IFREMER, DRV VP, Lab Biochim Mol Marines, F-29280 Plouzane, France TI - Extracellular polymers of microbial communities colonizing ancient limestone monuments MH - France MH - Mexico|Baja California Sur MH - Mexico|Campeche MH - Mexico|Yucatan T3 - MICROBIAL GROWTH IN BIOFILMSMethods in enzymology PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 8 U4 - Biochemical Research Methods; Biochemistry & Molecular Biology U5 - S;Review NT - SEnglishReview8525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USAMETH ENZYMOLOGYBS40S AV - English IS - 0076-6879 UR - ISI:000169760800027 SO - 2001 ;():331-339 3850 UI - 13899 AU - Ortega-Osorio A AU - Scott SD AD - Univ Toronto, Dept Geol, Marine Geol Res Lab, Toronto, ON M5S 3B1, CanadaOrtega-Osorio, A, Inst Mexicano Petr, Grp Invest Sistemas Marinos, Programa Invest Med Ambiente & Seguridad, Edif Mixtoala A,2do Piso Oficina 200,Eje Cent Laz, Mexico City 07730, DF, Mexico TI - Morphological and chemical characterization of neutrally buoyant plume-derived particles at the eastern manus basin hydrothermal field, Papua New Guinea AB - Neutrally buoyant particulate matter emitted from hydrothermal plumes in the eastern Manus Basin hydrothermal field, Papua New Guinea, was detected and sampled by CTD-transmissometer surveys during marine expeditions in 1991 and 1993. Characterization of suspended particulate matter has helped to prove that the main sources of venting are along a prominent 20-km-long NE-SW-striking felsic volcanic ridge. Elemental composition and particle morphology were determined by scanning electron microscopy and X-ray energy-dispersion spectroscopy. The size distribution and relative abundance of particles were determined by image analysis on selected samples. By looking at the composition of particulate matter, we can infer the origin, maturity and proximity of the source that is producing the particles. Seven types of particles have been morphologically and chemically characterized: i) filaments of probable biogenic origin of a Mn-Fe-Si phase containing traces of Cu and Zn, ii) orb-like particles of an Fe-Mn-Si phase containing minor Mg, Al, P, K and Ca, iii) barite, iv) anhydrite, v) colloidal-sized amorphous iron oxide, vi) an unidentified Si-Fe-rich phase, and vii) widespread biogenic detritus (shrimps, diatoms, silicoflagellates, copepods and unidentified gelatinous organic matter). Most of the particles are <2 mum in sire and range from <2 m for amor amorphous iron oxide to 100 mum for anhydrite and the Si-Fe-rich phase. Studies on suspended particulate matter constitute an effective way to recognize hydrothermal plumes MH - Canada MH - Mexico|Distrito Federal PB - NEPEAN: MINERALOGICAL ASSOC CANADA RP - NOT IN FILE U3 - TC 0 U4 - Mineralogy U5 - J;Article AV - English IS - 0008-4476 UR - ISI:000168200300002 L2 - hydrothermal particles;suspension;marine particles;characterization. hydrothermal plumes;Manus Basin;Papua New Guinea;DE-FUCA RIDGE; WESTERN WOODLARK BASIN; BACK-ARC BASIN; PACIFIC RISE; HOT SPRINGS; BISMARCK SEA; JUAN; DEPOSITS; OCEAN; 21-DEGREES-N SO - Canadian Mineralogist 2001 ;39():17-31 3851 UI - 13835 AU - Ortega A AU - Lambotte S AU - Bechinger B AD - Max Planck Inst Biochem, D-82152 Martinsried, GermanyNatl Autonomous Univ Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoBechinger, B, Max Planck Inst Biochem, Klopferspitz 18A, D-82152 Martinsried, Germany TI - Calorimetric investigations of the structural stability and interactions of colicin B domains in aqueous solution and in the presence of phospholipid bilayers AB - The effects of pH and temperature on the stability of interdomain interactions of colicin B have been studied by differential-scanning calorimetry, circular dichroism, and fluorescence spectroscopy. The calorimetric properties were compared with those of the isolated pore-forming fragment. The unfolding profile of the full-length toxin is consistent with two endothermic transitions. Whereas peak A (T-m = 55 degreesC) most likely corresponds to the receptor/translocation domain, peak B (T-m = 59 degreesC) is associated with the pore-forming domain. By lowering the pH from 7 to 3.5, the transition temperature of peaks A and B are reduced by 25 and 18 degreesC, respectively, due to proton exchange upon denaturation, The isolated pore-forming fragment unfolds at much higher temperatures (T-m = 65 degreesC) and is stable throughout a wide pH range, indicating that intramolecular interactions between the different colicin B domains result in a less stable protein conformation. In aqueous solution circular dichroism spectra have been used to estimate the content of helical secondary structure of colicin B (approximate to 40%) or its pore-forming fragment (approximate to 80%). Upon heating, the ellipticities at 222 nm strongly decrease at the transition temperature. In the presence of lipid vesicles the differential-scanning calorimetry profiles of the pore forming fragment exhibit a low heat of transition multicomponent structure. The heat of transition of membrane-associated colicin B (T-m = 54 degreesC at pH 3.5) is reduced and its secondary structure is conserved even at intermediate temperatures indicating incomplete unfolding due to strong protein-lipid interactions MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000168356600010 L2 - PORE-FORMING DOMAIN; PLANAR LIPID BILAYERS; E1 CHANNEL DOMAIN; MEMBRANE-INSERTION; CRYSTAL-STRUCTURE; FUNCTIONAL-PROPERTIES; TERMINAL FRAGMENT; DIPHTHERIA-TOXIN; MOLECULAR-BASIS; ION CHANNELS SO - Journal of Biological Chemistry 2001 ;276(17):13563-13572 3852 UI - 13389 AU - Ortiz-Conde A AU - Cerdeira A AU - Estrada M AU - Sanchez FJG AU - Quintero R AD - Univ Simon Bolivar, LEES, Caracas 1080A, VenezuelaIPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City, DF, MexicoSanchez, FJG, Univ Simon Bolivar, LEES, Apartado Postal 89000, Caracas 1080A, Venezuela TI - A simple procedure to extract the threshold voltage of amorphous thin film MOSFETs in the saturation region AB - A technique is presented to extract the threshold voltage of amorphous thin film MOSFETs in the saturation region. The technique is proposed because threshold voltage extraction in amorphous TFTs is different, and in general more complex, than in conventional crystalline bulk devices, since these TFTs exhibit several notable dissimilarities inherent to their characteristics. The saturation drain current follows an m power-law type dependence on gate bias, with an m different from the conventional value of 2. Additionally, a plot of the saturation current as a function of gate bias does not reveal the existence of an inflexion point. The method presented, which extracts the value of the power-law parameter rn as well, is based on the use of an auxiliary operator that involves the integration of the drain current as a Function of gate voltage. The technique was tested and its accuracy verified using the measured characteristics of an experimental n-channel a-Si:H thin him MOSFET. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000169397100006 L2 - amorphous MOSFETs;thin film transistors;threshold voltage;parameter extraction SO - Solid-State Electronics 2001 ;45(5):663-667 3853 UI - 13972 AU - Ortiz-Conde A AU - Estrada M AU - Cerdeira A AU - Sanchez FJG AU - De Mercato G AD - Univ Simon Bolivar, LEES, Caracas 1080A, VenezuelaIPN, CINVESTAV, SEES, Dept Ingn Elect, Mexico City 07300, DF, MexicoSanchez, FJG, Univ Simon Bolivar, LEES, Apartado Postal 8900, Caracas 1080A, Venezuela TI - Modeling real junctions by a series combination of two ideal diodes with parallel resistance and its parameter extraction AB - A technique is proposed to extract the reverse saturation current parameter and ideality factor of semiconductor junctions from the low forward voltage region of the device's characteristics, even under the presence of significant parallel resistance effects. The series combination of two ideal diodes is proposed for modeling real devices with a nonlinear contact resistance, in which case, the effective ideality factor at high voltage is higher than that of low voltage. It is proved, under certain physical assumptions, that the series combination of two ideal diodes can be modeled as a single effective diode for low voltage and another effective diode for high voltage. Both techniques were tested and their accuracy verified on experimental and simulated I V characteristics. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000167775000002 L2 - non-ideal diode;approximate diode model;diode ideality factor;diode reverse saturation current;PARASITIC SERIES SO - Solid-State Electronics 2001 ;45(2):223-228 3854 UI - 13270 AU - Ortiz GG AU - Sanchez-Ruiz MY AU - Tan DX AU - Reiter RJ AU - itez-King G AU - Beas-Zarate C AD - IMSS, CIBO, Lab Neuroinmunoendocrinol, Div Neurociencias, Guadalajara 44340, Jalisco, MexicoUniv Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78284, USAIMP, Mexico City, DF, MexicoOrtiz, GG, IMSS, CIBO, Lab Neuroinmunoendocrinol, Div Neurociencias, Sierra Mojada 800,Col Independencia, Guadalajara 44340, Jalisco, Mexico TI - Melatonin, vitamin E, and estrogen reduce damage induced by kainic acid in the hippocampus: potassium-stimulated GABA release AB - Melatonin, vitamin E and estrogen have been shown to exert neuroprotective effects against kainic acid (KA)-induced damage in the hippocampus. The aim of the present study was to examine the changes in potassium-evoked gamma -aminobutyric acid (GABA) release in the hippocampus of KA-treated rats and to test the possible protective effects of melatonin, vitamin E or estrogen, Following the treatment of mice with KA, a marked reduction in potassium-evoked [H-3]GABA release was observed. Melatonin or estrogen prevented the reduction in potassium-evoked GABA release due to kainate administration. Vitamin E also exhibited some protective effect, but it was less than that provided by melatonin or estrogen. Melatonin, estrogen and, to a lesser extent, vitamin E reduce the physiological toxicity of KA. Since KA is believed to cause neuronal alterations via oxidative processes, it is assumed that the free radical scavenging and oxidative properties of melatonin, estrogen and vitamin E account for the protective effects of these agents MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Endocrinology & Metabolism;Neurosciences;Physiology U5 - J;Article AV - English IS - 0742-3098 UR - ISI:000169878100009 L2 - antioxidant;excitatory neurotransmitters;free radicals;glutamate;neuroprotection;reactive oxygen species;CENTRAL-NERVOUS-SYSTEM; EXCITATORY AMINO-ACIDS; INDUCED LIPID-PEROXIDATION; IN-VIVO; OXIDATIVE STRESS; GLUTAMATE-RECEPTORS; RADICAL GENERATION; BRAIN; KAINATE; NEURONS SO - Journal of Pineal Research 2001 ;31(1):62-67 3855 UI - 13579 AU - Ortiz GG AU - Feria-Velasco A AU - Falcon-Franco MA AU - Bitzer-Quintero OK AU - Garcia JJ AU - Rosales SA AU - Ruiz-Rizo L AU - Reiter RJ AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Neurociencias, Guadalajara 44340, Jalisco, MexicoCIATEJ, Div Patol & Biotecnol Ambiental, Guadalajara, Jalisco, MexicoUniv Autonoma Guadalajara, Inst Ciencias Biol, Guadalajara, Jalisco, MexicoUniv Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78285, USAOrtiz, GG, Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Div Neurociencias, Sierra Mojada 800, Guadalajara 44340, Jalisco, Mexico TI - Different patterns in the histology and autofluorescence of the Harderian glands of the Syrian hamster, rat, mouse, Mongolian gerbil and guinea pig AB - The purpose of this study was to compare the natural fluorescence in the Harderian glands of the Syrian hamster, rat, mouse, Mongolian gerbil and guinea pig (both sexes). For each species, 10 animals (five males and five females) were used. Histological autofluorescence studies were performed using a fluorescence microscope (450-490 nm filter). Two different types of fluorescent cells were observed in both hamster (type AFI high intensity and type AFII, low fluorescence) and rat (type AFI, low fluorescence and type AFII, high fluorescence) Harderian glands. The fluorescence was basally located in all mice cells, whereas it was observed near the epithelial cell nuclei in the Mongolian gerbil (occupying two-thirds and one-third of the cells in males and females, respectively). A high intensity of fluorescence was present throughout the acinar cells in the guinea pig. The patterns of fluorescence identified exhibited a sexual dimorphism in all species studied. These results demonstrate that the Harderian glands of the animal species examined exhibit a variety of histological autofluorescence patterns MH - Mexico|Jalisco MH - USA PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Anatomy & Morphology;Veterinary Sciences U5 - J;Article AV - English IS - 0340-2096 UR - ISI:000169036900005 L2 - PINEAL-GLAND; MERIONES-UNGUICULATUS; LIGHTING CONDITIONS; FINE-STRUCTURE; HORMONES SO - Anatomia Histologia Embryologia-Journal of Veterinary Medicine Series C 2001 ;30(2):107-115 3856 UI - 13792 AU - Ortiz GG AU - Crespo-Lopez ME AU - Moran-Moguel C AU - Garcia JJ AU - Reiter RJ AU - cuna-Castroviejo D AD - IMSS, CIBO, Div Neurociencias, Lab Desarrollo Envejecimiento, Guadalajara 44340, Jalisco, MexicoCtr Invest & Asistencia Tecnol & Diseno Estado Ja, CIATEJ, Div Patol & Biotecnol Ambiental, Guadalajara, Jalisco, MexicoIMSS, CIBO, Div Mol Med, Guadalajara 44340, Jalisco, MexicoUniv Zaragoza, Fac Med, Dept Fisiol & Farmacol, E-50009 Zaragoza, SpainUniv Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78284, USAUniv Granada, Inst Biotecnol, Dept Fisiol, E-18071 Granada, SpainOrtiz, GG, IMSS, CIBO, Div Neurociencias, Lab Desarrollo Envejecimiento, Sierra Mojada 800, Guadalajara 44340, Jalisco, Mexico TI - Protective role of melatonin against MPTP-induced mouse brain cell DNA fragmentation and apoptosis in vivo AB - OBJECTIVES: 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a neurotoxin that induces a Parkinsonian-type syndrome in animals which is similar to Parkinson's disease in humans. MPTP toxicity partially depends on the production of free radicals which in turn play a key role in the apoptotic death of neurons. In the present study melatonin, a potent free radical scavenger with antiapoptotic properties, was given to determine whether it would reduce oxidative stress in mice treated with MPTP. MATERIALS AND METHODS:Male mice were given MPTP with or without melatonin and the brain was studied either 6h, 24h, 7 days or 15 days after the last MPTP injection. RESULTS: The results show that melatonin counteracted in vivo MPTP-induced apoptosis in midbrain neurons at 6 and 24 h after MPTP treatment, and partially prevented apoptosis at 7 and 15 days after MPTP administration. MPTP treatment also produced time-dependent cell damage, whereas melatonin reduced the percentage of damaged cells at all time points, the effect being most evident at 15 days after treatment. Moreover, melatonin counteracted MPTP-dependent DNA fragmentation in the midbrain and striatum at 7 and 15 days after drug administration. CONCLUSION: These results support a role for melatonin in protecting neurons against MPTP toxicity in vivo, and suggest that its antiapoptotic action is one of the mechanisms by which melatonin protects neuronal cells from neurotoxic insults MH - Mexico|Jalisco MH - Spain MH - USA PB - STOCKHOLM: MAGHIRA & MAAS PUBLICATIONS RP - NOT IN FILE U3 - TC 21 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0172-780X UR - ISI:000168468200005 L2 - melatonin;apoptosis;DNA fragmentation;Parkinson's disease;MPTP;NITRIC-OXIDE SYNTHASE; PARKINSONS-DISEASE; OXIDATIVE STRESS; LIPID-PEROXIDATION; RESPIRATORY-CHAIN; SUBSTANTIA NIGRA; PC12 CELLS; COMPLEX-I; TOXICITY; NEURONS SO - Neuroendocrinology Letters 2001 ;22(2):101-108 3857 UI - 13991 AU - Ortiz JL AU - Caprio JJ AU - Amigo V AU - Salvador MD AD - Inst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan & Ind, Santiago De Queretaro 76130, MexicoUniv Jaume I, Dept Tecnol, Castellon 12071, SpainUniv Politecn Valencia, Dept Ingn Mecan & Mat, Valencia 46022, SpainOrtiz, JL, Inst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan & Ind, Campus Queretaro,Epigmenio Gonzalez 500, Santiago De Queretaro 76130, Mexico TI - Fitting corrosion of an Al-Mg-Si-Cu alloy reinforced with nitride particles, P/M processed MH - Mexico|Queretaro MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000167779800002 L2 - METAL-MATRIX COMPOSITES; ALUMINUM; BEHAVIOR SO - Journal of Materials Science Letters 2001 ;20(3):197-199 3858 UI - 13282 AU - Ortiz LA AU - Lasky JA AU - Gozal E AU - Brody AR AU - Pardo A AU - Selman M AU - Ruiz V AU - Friedman M AD - Inst Enfermedades Resp, Mexico City, DF, MexicoTulane Med Ctr, Dept Med, New Orleans, LA, USAOrtiz, LA, Dept Med, Sect Pulm Dis Crit Care & Environm Med SL9, 1430 Tulane Ave, New Orleans, LA 70112 USA TI - Tumor necrosis factor receptor deficiency protects mice from silica-induced lung fibrosis by altering lung matrix metalloproteinase-13/tissue inhibitor of metalloproteinase-1 RNA expression and decreasing activating protein-1 activation MH - USA MH - Mexico|Distrito Federal PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 0 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000169917400004 SO - Chest 2001 ;120(1):2S-3S 3859 UI - 14481 AU - Ortiz LA AU - Lasky J AU - Gozal E AU - Ruiz V AU - Lungarella G AU - Cavarra E AU - Brody AR AU - Friedman M AU - Pardo A AU - Selman M AD - Tulane Univ, Med Ctr, Sect Pulm Dis Crit Care & Environm Med, Dept Pathol, New Orleans, LA 70112, USATulane Univ, Med Ctr, Lung Biol Program, New Orleans, LA 70112, USAInst Nacl Enfermedades Resp, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Siena, Ist Patol Gen, I-53100 Siena, ItalyOrtiz, LA, Tulane Univ, Med Ctr, Sect Pulm Dis Crit Care & Environm Med, Dept Med SL9, New Orleans, LA 70112 USA TI - Tumor necrosis factor receptor deficiency alters matrix metalloproteinase 13 tissue inhibitor of metalloproteinase 1 expression in murine silicosis AB - Murine exposure to silica is associated with enhanced tumor necrosis factor alpha (TNF-alpha) expression and matrix deposition. The regulation of TNF is mediated through TNF receptor (TNFR) activation of transcription factors. In the present work we have studied the importance of the individual TNFR in silica-induced lung inflammation and matrix deposition in mice. We studied RNA expression of TNF, alpha1(I) collagen, interstitial collagenase (MMP-13), and its inhibitor (TIMP-1) in the lungs of silica-treated mice. Furthermore, we correlated MMP-13/TIMP-1 RNA abundance with activation of the transcription factors AP-1 and NF-kappaB in the lungs of C57BL/6 mice, and of mice deficient in one of the two types of TNFR (p55(-/-) or p75(-/-)), exposed to silica (0.2 g/kg) or saline by intratracheal instillation. Animals were killed 28 d after exposure and lung hydroxyproline (HP), TNF, alpha1(I) collagen, MMP-13, and TIMP-1 RNA abundance was measured. AP-1 and NF-kappaB activation was studied by gel-shift assays. Compared with C57BL/6 mice, p55(-/-) and p75(-/-) mice significantly (*p < 0.05) decreased lung HP accumulation in response to silica. All murine strains enhanced TNF and 1(I) collagen mRNA in response to silica. Enhanced (p < 0.05) MMP-13 RNA expression was also observed in all murine strains in response to silica. Enhanced (p < 0.05) TIMP-1 RNA expression was observed in C57BL/6 mice, but not in p55(-/-) or p75(-/-) mice, in response to silica. NF-KB activation was observed in all murine strains, whereas AP-1 activation was observed only in C57BL/6 mice after silica treatment. These data suggest that TNFR deletion modifies MMP-13/TIMP-1 expression in favor of matrix degradation MH - Italy MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 19 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000166540100041 L2 - NF-KAPPA-B; TNF-ALPHA PRODUCTION; PULMONARY FIBROSIS; LUNG INJURY; DERMAL FIBROBLASTS; MESSENGER-RNA; RAT LUNGS; MICE; COLLAGENASE; CELLS SO - American Journal of Respiratory and Critical Care Medicine 2001 ;163(1):244-252 3860 UI - 13806 AU - Oskin M AU - Stock J AU - Martin-Barajas A AD - CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USACtr Invest Cientif & Educ Super Ensenada, Ensenada, Baja California, MexicoOskin, M, CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USA TI - Rapid localization of Pacific-North America plate motion in the Gulf of California AB - Correlation of late Miocene volcaniclastic strata across the northern Gulf of California shows that the Pacific-North America plate boundary localized east of the Baja California peninsula ca, 6 Ma. Dextral offset of the 12.6 Ma Tuff of San Felipe and a pair of overlying ca. 6.3 Ma pyroclastic Bows indicate at least 255 +/- 10 km of displacement along an azimuth of 310 degrees. Isopach and facies trends of the Tuff of San Felipe support no more than a few tens of kilometers of additional dextral displacement between 12.6 and 6.3 Ma. These constraints indicate that nearly all of the dextral displacement between the Pacific and North American plates prior to 6.3 Ma was accommodated outside of the gulf region, and by 4.7 Ma, the plate boundary motion was localized in the Gulf of California. Although continental extension has accounted for a component of plate boundary motion in northwestern Mexico since cessation of subduction offshore of southern Baja California at 12.5 Ma, transfer of Baja California to the Pacific plate was delayed by at least 6-7 m.y MH - Mexico|Baja California MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 27 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000168445700021 L2 - Gulf of California;Mexico;rifting;plate motion;ignimbrite;correlation;NORTHEASTERN BAJA-CALIFORNIA; PUERTECITOS VOLCANIC PROVINCE; SIERRA SAN-FERMIN; OF-CALIFORNIA; MEXICO; TECTONICS; EXTENSION; EVOLUTION; MIOCENE; MARGIN SO - Geology 2001 ;29(5):459-462 3861 UI - 13093 AU - Osminkina IV AU - Kaziev GZ AU - Kin'ones SO AU - de Ita A AD - Moscow State Pedag Univ, Moscow 119882, RussiaUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoOsminkina, IV, Moscow State Pedag Univ, Malaya Pirogovskaya 1, Moscow 119882, Russia TI - Synthesis and study of ammonium hexamolybdenoindate(III) AB - Ammonium hexamolybdenoindate(III) hydrate was synthesized and studied by IR spectroscopy and X-ray crystallography. The crystals of the compound are orthorhombic with a = 11.034 Angstrom, b = 11.323 Angstrom, c = 5.903 Angstrom (+/-0.003 Angstrom), Z = 1, d(calc) = 3.125 g/cm(3). According to the molar conductivity of solutions and IR spectra, the compound is a poorly soluble crystal hydrate with the coordination formula (NH4)(3)[InMoO6O18(OH)(6)] . 10H(2)O. Its solubility in water was determined. Thermal stability of the compound was studied by thermogravimetry MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0036-0236 UR - ISI:000170273400003 SO - Russian Journal of Inorganic Chemistry 2001 ;46(7):959-961 3862 UI - 12296 AU - Ostrosky-Solis F AU - Mendoza VU AU - Ardila A AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Colima, Mexico City, DF, MexicoArdila, A, 12230 NW 8th St, Miami, FL 33182, USA TI - Neuropsychological profile of patients with primary systemic hypertension AB - Arterial hypertension represents a risk factor for cerebrovascular disease. It has been hypothesized that chronic hypertension may eventually result in small subcortical infarcts associated with some cognitive impairments. One hundred fourteen patients with primary systemic hypertension (PSH) and 114 matched subjects were selected. PSH patients were further divided in four groups depending upon the hypertension severity. In addition to the medical and laboratory exams, a neuropsychological evaluation was administered. The NEUROPSI neuropsychological test battery was used. An association between level of hypertension and cognitive impairment was observed. Most significant differences were observed in the following domains: Reading, executive functioning, constructional, and memory-recall. No differences were observed in orientation, memory-recognition, and language. Some neuropsychological functions appeared impaired even in the PSH group with the least risk factors. Cognitive evaluation may be important in cases of PSH not only to determine early subtle cognitive changes, but also for follow-up purposes, and to assess the efficacy of different therapeutic procedures MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences U5 - J;Article AV - English IS - 0020-7454 UR - ISI:000172435400004 L2 - hypertension;cognitive deficits;vascular disease;COGNITIVE FUNCTION; BLOOD-PRESSURE; RISK-FACTORS SO - International Journal of Neuroscience 2001 ;110(3-4):159-172 3863 UI - 13013 AU - Ostrovskii IV AU - Korotchenkov OA AU - Olikh OY AU - Podolyan AA AU - Chupryna RG AU - Torres-Cisneros M AD - Kiev Taras Shevchenko Univ, Fac Phys, UA-01022 Kiev, UkraineUniv Guanajuato, Fac Ingn, Salamanca 36730, MexicoOstrovskii, IV, Kiev Taras Shevchenko Univ, Fac Phys, UA-01022 Kiev, Ukraine TI - Acoustically driven optical phenomena in bulk and low-dimensional semiconductors AB - The purpose of this paper is to present new acousto-optical effects in semiconductors. Here we discuss acoustically driven carrier diffusion length and photovoltaic effect in Si and SiGe heterostructures, acoustically driven radiative recombination kinetics in ZnSe/ZnS quantum wells and acousto-photo-reflectance from GaAs epitaxial layers. We argue that acoustic driving can significantly affect the carrier dynamics in bulk and low-dimensional semiconductors MH - Mexico|Guanajuato MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 1464-4258 UR - ISI:000170571700029 L2 - photovoltaic effect;carrier diffusion length;radiative recombination kinetics;carrier dynamics;POLYCRYSTALLINE SILICON; ULTRASOUND TREATMENT; IRON; SURFACE; PAIRS; HETEROSTRUCTURES; CRYSTALS; WAVES SO - Journal of Optics A-Pure and Applied Optics 2001 ;3(4):S82-S86 3864 UI - 13104 AU - Ostry DJ AU - Romo R AD - McGill Univ, Dept Psychol, Montreal, PQ H3A 1B1, CanadaUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoOstry, DJ, McGill Univ, Dept Psychol, 1205 Dr Penfield Ave, Montreal, PQ H3A 1B1, Canada TI - Tactile shape processing AB - Neuroimaging techniques may aid in the identification of areas of the human brain that are involved in tactile shape perception. Bodegard et al. (2001) relate differences in the properties of tactile stimuli to differences in areas of cortical activation to infer tactile processing in the somatosensory network MH - Canada MH - Mexico|Distrito Federal PB - CAMBRIDGE: CELL PRESS RP - NOT IN FILE U3 - TC 1 U4 - Neurosciences U5 - J;Editorial Material AV - English IS - 0896-6273 UR - ISI:000170277700003 SO - Neuron 2001 ;31(2):173-174 3865 UI - 12376 AU - Otazo-Sanchez E AU - Perez-Marin L AU - Estevez-Hernandez O AU - Rojas-Lima S AU - onso-Chamarro J AD - Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Mexico City, DF, MexicoUniv La Habana, Inst Mat & React, Havana 10400, CubaInst Tecnol Toluca, Metepec 52140, Estado Mexico, MexicoUniv Autonoma Barcelona, Fac Ciencies, Grp Sensors & Biosensors, E-08193 Barcelona, SpainOtazo-Sanchez, E, Carreters Pachuca Tulancingo Km 4-5,Colonia Ciuda, Pachuca 42035, Hidalgo, Mexico TI - Aroylthioureas: new organic ionophores for heavy-metal ion selective electrodes AB - Thiourea derivatives (46 aroylthioureas) having different substituents close to the sulfur atom were synthesized and their ionophore potential in ion selective electrodes (ISEs) was examined. Structural considerations were taken into account based on the corresponding heavy-metal ISE parameters, As ionophores, some 1-furoyl-3-substituted thioureas (series 2) gave the best results in Pb(ii), Hg(ii) and Cd(ii) ISEs. The strong intramolecular hydrogen bond in series 2 allows ligand interaction only through the C=S group. Substituents on the furan and phenyl rings give rise to low solubility in the membrane plasticizer. 3-Alkyl substituted furoylthioureas improve solubility but enhance oxidative processes with chain length. New X-ray diffraction (XRD) structures and theoretical DFT calculations were considered in the analysis of the substituent influence on the selectivity of ISEs. These new ionophores have advantages because of their stability, simple synthesis and easy modification of the sulfur binding ability resulting from substitution MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Hidalgo MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 1472-779X UR - ISI:000172200000027 L2 - LIQUID MEMBRANE-ELECTRODE; NEUTRAL CARRIER; BULK OPTODES; SENSORS; COEFFICIENTS; LEAD(II); LIGANDS SO - Journal of the Chemical Society-Perkin Transactions 2 2001 ;(11):2211-2218 3866 UI - 12151 AU - Ott J AU - Walter F AU - Brinks E AU - Van Dyk SD AU - Dirsch B AU - Klein U AD - Univ Bonn, Inst Radioastron, D-53121 Bonn, GermanyCALTECH, Dept Astron, Pasadena, CA 91125, USACALTECH, Owens Valley Radio Observ, Pasadena, CA 91125, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, GTO, MexicoCALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125, USAConcepcion Univ, Dept Fis, Concepcion, ChileOtt, J, Univ Bonn, Inst Radioastron, Hugel 71, D-53121 Bonn, Germany TI - Evidence for blowout in the low-mass dwarf galaxy Holmberg I AB - We present radio and optical observations of Holmberg I (Ho I), a member of the M81 group of galaxies (distance similar to3.6 Mpc). Ho I is a low-mass, low surface brightness dwarf galaxy. High-resolution, multiarray, Very Large Array observations in the line of neutral hydrogen (H I) reveal a supergiant shell (diameter 1.7 kpc) that covers about half the optical extent of Ho I and that comprises 75% of the total H I content (total H I mass: 1.1 x 10(8) M.). We estimate the scale height of the H I layer to be 250 pc less than or similar to h less than or similar to 550 pc. We set a tentative upper limit to the dark matter content of The H I data are complemented by deep, optical UBV(RI)(C) observations and narrowband H alpha imaging obtained at the Calar Alto 2.2 m telescope. We find M-HI/L-B = 1.1 M./L-B.. The total visible (stars plus gas) mass of Ho I adds up to 2.4 x 10(8) M.. This leads to a total mass of less than or similar to5.5 x 10(8) M. and an inclination for Ho I of 10 degrees less than or similar to i less than or similar to 14 degrees. The origin of Ho I's peculiar H I morphology is discussed in terms of a supergiant shell created by strong stellar winds and supernova explosions. We estimate that the energy deposited falls in the range of 1.2 x 10(53) ergs less than or similar to E less than or similar to 2.6 x 10(53) ergs (equivalent to 120-260 Type II SNe explosions). From a comparison with isochrones, as well as from dynamical modeling based on the H I data, we derive an age for the supergiant H I shell of similar to 80 +/- 20 Myr. The morphological center of Ho I (i.e., the center of the ring) is offset by 0.75 kpc with respect to the dynamical center. Within the interior of the shell, the light distribution is exponential with a rather shallow gradient and blue optical colors. Beyond a radius corresponding to an H I column density of similar to 10(21) cm(-2), the putative star formation threshold, the disk becomes considerably redder and the slope for the exponential light distributions steepens. We attribute this to a uniform star formation activity in the recent past within the central 2 kpc of Ho I. Color-magnitude diagrams based on our CCD data show that young stars, with ages of 15-30 Myr, are situated along the inside of the rim of the giant H I shell. On the rim itself, we find even younger stars and some faint H II regions. It is speculated that these stars are the result of secondary star formation on the rim of the shell. Based on the global morphology and velocity dispersion, as well as the location of the H II regions, we find evidence for ram pressure within the M81 group. Finally, we discuss the likelihood of Ho I having lost some of its interstellar material to the intergalactic medium ("blow-out" scenario) MH - Chile MH - Germany MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000172932200019 L2 - galaxies : dwarf;galaxies : individual (Holmberg = UGC 5139=DDO 63);galaxies : irregular;galaxies : photometry;ISM : bubbles;ISM : HI;PROPAGATING STAR-FORMATION; NEUTRAL INTERSTELLAR-MEDIUM; LARGE-MAGELLANIC-CLOUD; H-I; IRREGULAR GALAXIES; SPIRAL GALAXIES; M81 GROUP; STELLAR CONTENT; HYDROGEN; SHELLS SO - Astronomical Journal 2001 ;122(6):3070-3091 3867 UI - 12411 AU - Ott J AU - Walter F AU - Brinks E AU - Klein U AD - Univ Bonn, Inst Radioastron, D-5300 Bonn, GermanyCALTECH, Pasadena, CA 91125, USAUniv Guanajuato, Dept Astron, Guanajuato, MexicoOtt, J, Univ Bonn, Inst Radioastron, D-5300 Bonn, Germany TI - The HI morphology of low-mass dwarf galaxies MH - Germany MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900022 L2 - galaxies : individual (Holmberg I, UGC 5139, DDO 63);galaxies : irregular;galaxies : dwarf;ISM : bubbles;ISM : HI SO - Astrophysics and Space Science 2001 ;277():107-107 3868 UI - 14381 AU - Paczka JA AU - Friedman DS AU - Quigley HA AU - Barron Y AU - Vitale S AD - Johns Hopkins Hosp, Wilmer Ophthalmol Inst, Dana Ctr Prevent Ophthalmol, Baltimore, MD 21287, USAUniv Guadalajara, CUCS, Inst Oftalmol & Ciencias Visuales, Guadalajara, Jalisco, MexicoJohns Hopkins Hosp, Wilmer Ophthalmol Inst, Glaucoma Serv, Baltimore, MD 21287, USAQuigley, HA, Johns Hopkins Hosp, Wilmer Ophthalmol Inst, Dana Ctr Prevent Ophthalmol, Wilmer 120,600 N Wolfe St, Baltimore, MD 21287 USA TI - Diagnostic capabilities of frequency-doubling technology, scanning laser polarimetry, and nerve fiber layer photographs to distinguish glaucomatous damage AB - PURPOSE: To investigate the ability of three diagnostic tests: frequency-doubling technology (FDT), scanning laser polarimetry (GDx), and nerve fiber layer (NFL) photographs to distinguish normal from glaucomatous eyes. METHODS: Data were obtained in a cross-sectional, hospital clinic-based study, including one eye from each of 253 persons older than 40 years (68 normal, 94 glaucoma suspects and 91 glaucoma patients), We performed a comprehensive ocular examination, as well as static automated perimetry (Humphrey 24-2), screening FDT, GDx, optic nerve stereoscopic photographs and high-contrast Nn photographs. RESULTS: The following were significantly different for glaucomatous patients compared with suspects and normals: mean values of mean deviation (MD, Humphrey 24-2) and corrected pattern standard deviation (CPSD), 11 GDx indices, mean FDT testing time and missed points, and Nn graded defects (ANOVA, Mantel-Haenszel test; p = 0.0001). Using Humphrey 24-2 test results and clinical assessment as the defining features of glaucoma, we found that the optimal mix of sensitivity and specificity values were 84% and 100% for FDT (presence of any defect); 62% and 96% for GDx (The Number, cut-off value of 27); and, 95% and 82% for NFL photographs (presence of any abnormality). FDT testing took the least time to be administered. CONCLUSIONS: The FDT had the best diagnostic performance. Neural network analysis of GDx data outperformed other elements of its software. (Am J Ophthalmol 2001;131:188-197. (C) 2001 by Elsevier Science Inc. All rights reserved) MH - USA MH - Mexico|Jalisco PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 53 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000166870600005 L2 - VISUAL-FIELD LOSS; OCULAR HYPERTENSION; CLINICAL-EVALUATION; OPTIC DISK; THICKNESS; ATROPHY; ELLIPSOMETRY; PROGRESSION; PERIMETRY; DEFECTS SO - American Journal of Ophthalmology 2001 ;131(2):188-197 3869 UI - 14556 AU - Padilla K AU - Talanquer V AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Arizona, Dept Chem, Tucson, AZ 85721, USAPadilla, K, Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Heterogeneous nucleation on aerosol particles AB - We have applied density functional theory in statistical mechanisms to study the heterogeneous nucleation of supersaturated vapors on spherical aerosol-like substrates. Our calculations reveal the inadequacy of the classical nucleation theory in describing the condensation of droplets on very small particles. The latter approach is particularly inaccurate both at high supersaturations and in the vicinity of the wetting transition. Comparisons are also made with recent experimental results for the condensation of supersaturated vapors on submicrometer particles. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000166213100029 L2 - GAS-LIQUID NUCLEATION; HOMOGENEOUS NUCLEATION; WATER-VAPOR; SUBMICROMETER PARTICLES; POLAR-MOLECULES; DIPOLAR FLUIDS; SIO2; ACETONITRILE; DIAMETERS; SUBSTRATE SO - Journal of Chemical Physics 2001 ;114(3):1319-1325 3870 UI - 13647 AU - Padilla P AU - Pobedria BE AU - Rodriguez-Ramos R AD - Univ Nacl Autonoma Mexico, FENOMEC, IIMAS, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Composites Dept, Moscow 119899, RussiaUniv La Habana, Dept Ecuaciones Diferenciales & Mecan, La Habana, CubaUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoPadilla, P, Univ Nacl Autonoma Mexico, FENOMEC, IIMAS, Circuito Escolar,Cd Univ, Mexico City 04510, DF, Mexico TI - Constitutive relations for piezoelectric materials in terms of invariants MH - Cuba MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mechanics U5 - J;Article AV - English IS - 0093-6413 UR - ISI:000168787200008 SO - Mechanics Research Communications 2001 ;28(2):179-186 3871 UI - 13137 AU - Paglione TAD AU - Wall WF AU - Young JS AU - Heyer MH AU - Richard M AU - Goldstein M AU - Kaufman Z AU - Nantais J AU - Perry G AD - Univ Massachusetts, Lederle Grad Res Ctr, Dept Astron, Amherst, MA 01003, USAInst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoPaglione, TAD, Univ Michigan, Dept Astron, 500 Church St, Ann Arbor, MI 48109 USA TI - A mapping survey of the (CO)-C-13 and (CO)-C-12 emission in galaxies AB - We present spectra of the extended (CO)-C-12 and (CO)-C-13 J=1 -->0 emission along the major axes of 17 nearby galaxies. Spatial variations in the ratio of CO and (CO)-C-13 integrated intensities, R, are found in nearly every galaxy observed. There is an overall variation in R of 20%-40% from the inner 2 kpc to the disk. Roughly one-third of the survey galaxies have such gradients in R detected above the 2 sigma confidence level. Though some galaxies show a lower central value of R, on average R inside 2 kpc is 10%-30% higher than R outside of 2 kpc. The average CO/(CO)-C-13 intensity ratio within the central 2 kpc of the survey sources is 11.60 +/-0.4 (based on the noise) +/-1.5 (based on systematic uncertainties estimated from daily variations in CO and (CO)-C-13 intensities). The 1 sigma dispersion in R between galactic nuclei of 4.2 is also quite large. The average value of R outside 2 kpc is 9.8 +/-0.6 +/-1.2 with a standard deviation of 4.5. An increase in the CO/(CO)-C-13 intensity ratio from disk to nucleus may imply that the conversion factor between CO intensity and H-2 column density, X, is lower in galactic nuclei. In addition, variations in physical conditions, most notably the gas kinetic temperature, affect both R and X. Abundance variations probably do not cause the gradient in R, though we do not rule out a decrease in effective cloud column densities in galactic nuclei possibly caused by destructive starburst superwinds. A modest rise in temperature (less than a factor of 2 or 3) from outside a 2 kpc radius toward the nucleus can easily account for the observed gradient. These results support previous work implying that X is lower in the center of the Milky Way and probably most galactic nuclei. Therefore, calculating H-2 masses using the standard Galactic X-factor, especially within the central few kiloparsecs of galaxies, overestimates the true mass by factors of a few. The standard X-factor still appears to be appropriate for galactic disks MH - USA MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000170323800004 L2 - galaxies : ISM;galaxies : starburst;ISM : clouds;ISM : molecules;GIANT MOLECULAR CLOUDS; CARBON-MONOXIDE; INTERSTELLAR-MEDIUM; GALACTIC-CENTER; STAR FORMATION; NEARBY GALAXIES; SPIRAL GALAXIES; COLUMN DENSITY; OUTER GALAXY; CO SURVEY SO - Astrophysical Journal Supplement Series 2001 ;135(2):183-200 3872 UI - 12487 AU - Pal U AU - Aguila E AU - Vazquez O AU - Koshizaki N AU - Sasaki T AU - Terauchi S AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoMinist Int Trade & Ind, Natl Inst Mat & Chem Res, AIST, Tsukuba, Ibaraki 305, JapanPal, U, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Synthesis and characterization of Au/ZnO nanocomposites AB - Au/ZnO nanocomposite thin films were prepared by co-sputtering of ZnO and gold. The Au content in the films was varied by varying the length of gold wires on the ZnO target, Depending upon the Au content in the films, the Au nanoparticles of different average size values were formed in the ZnO matrix. The composite films were annealed at different temperatures to study the evolution of Au particles and the subsequent change in their optical properties. With the increase of Au content in the films, the size of the nanometric Au particles decreased but increased with the increase of annealing temperature MH - Japan MH - Mexico|Puebla PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900027 L2 - THIN-FILMS SO - Modern Physics Letters B 2001 ;15(17-19):679-682 3873 UI - 12701 AU - Pal U AU - Almanza EA AU - Cuchillo OV AU - Koshizaki N AU - Sasaki T AU - Terauchi S AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoMinist Int Trade & Ind, AIST, Natl Inst Mat & Chem Res, NIMC, Tsukuba, Ibaraki 305, JapanPal, U, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Preparation of Au/ZnO nanocomposites by radio frequency co-sputtering AB - Au/ZnO nanocomposite films were prepared by co-sputtering of ZnO and gold wires. The composite films were transparent and red in color due to surface plasmon resonance absorption of small Au particles. The composite films were annealed at different temperatures in argon atmosphere to study the evolution of the size of An particles and subsequent change in their optical properties. With the increase of annealing temperature, the size of the Au particles increased and the intensity of plasmon resonance absorption peak increased. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000171361800012 L2 - thin films;nanocomposites;colloidal metal particles;GLASS SO - Solar Energy Materials and Solar Cells 2001 ;70(3):363-368 3874 UI - 13450 AU - Pal U AU - Bautista-Hernandez A AU - Koshizaki N AU - Sasaki T AU - Terauchi S AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, Pue, MexicoMITI, Agcy Ind Sci & Technol, Natl Inst Mat & Chem Res, NIMC, Tsukuba, Ibaraki 305, JapanPal, U, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Pue, Mexico TI - Synthesis of GaAs nanoparticles embedded in SiO2 matrix by radio frequency co-sputtering technique AB - Nanoparticles of GaAs embedded in SiO2 matrix were prepared by radio a frequency co-sputtering technique. The content of GaAs in the composite films was varied by varying the number of pieces of GaAs co-targets on a SiO2 target. The as-grown composite films were amorphous in nature, the optical absorption spectra of the films revealed a large shift in the optical band gap of GaAs, which partly corresponds to the strong quantum confinement of electrons and holes in the nanoparticles and is partly due to their amorphous nature. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000169389400134 L2 - nanocomposites;thin films;optical properties;quantum confinement;OPTICAL-PROPERTIES; VISIBLE PHOTOLUMINESCENCE; CLUSTERS; GE; NANOCRYSTALS; GLASS SO - Scripta Materialia 2001 ;44(8-9):1841-1846 3875 UI - 14287 AU - Palacios D AU - Zamorano JJ AU - Gomez A AD - Univ Complutense Madrid, Dept AGR & Geog Fis, Fac Geog, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoPalacios, D, Univ Complutense Madrid, Dept AGR & Geog Fis, Fac Geog, E-28040 Madrid, Spain TI - The impact of present lahars on the geomorphologic evolution of proglacial gorges: Popocatepetl, Mexico AB - Popocatepetl (19 degrees 03'N, 98 degrees 35'W; 5450 m) is located 70 km southeast of Mexico City. The volcano resumed its eruptive activity in 1994 with emissions of pyroclasts that partially melted the glacier located on the north face. The sudden release of water generated large lahars that flowed downslope though proglacial gorges. This paper examines the geomorphologic evolution of these gorges since 1992 and focuses particularly on the landforms created by the most recent lahars of July 1997. The research suggests that the transport capacity of the: lahars has increased despite the fact that the sediments they carry originate in deposits formed by earlier processes. The presence of continuous permafrost in the area is a key factor in the formation of lahars. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000167036800002 L2 - popocatepetl;lahars;deglaciation;volcanic geomorphology;MOUNT-ST-HELENS; DEBRIS FLOWS; YUKON-TERRITORY; 1995 ERUPTION; WASHINGTON; VOLCANO; SEDIMENTOLOGY; FLOODS; SNOW SO - Geomorphology 2001 ;37(1-2):15-42 3876 UI - 10073 AU - Palacios E AU - Racotta IS AU - Heras H AU - Marty Y AU - Moal J AU - Samain JF AD - Ctr Invest Biol Noroeste, La Paz, BCS, MexicoNatl Univ La Plata, CONICET, Fac Med, Inst Invest Bioquim la Plata, RA-1900 La Plata, ArgentinaUniv Bretagne Occidentale, CNRS, UMR 6521, F-29285 Brest, FranceIFREMER, Ctr Brest, Lab Physiol Mollusques, F-29280 Plouzane, FrancePalacios, E, Ctr Invest Biol Noroeste, AP 128, La Paz, BCS, Mexico TI - Relation between lipid and fatty acid composition of eggs and larval survival in white pacific shrimp (Penaeus vannamei, Boone, 1931) AB - In this study, lipid classes and fatty acid composition were determined in eggs of P. vannamei as a function of survival to zoea III stage. Spawns were reared individually to zoea III and grouped, according to their final survival to this larval stage, into spawns of high and low survival. Eggs of individual spawns were analyzed for lipid and fatty acid composition of neutral and polar lipids and the results were then grouped according to survival to zoea III. The lipids within each group (high and low survival to zoea III) were pooled for the separation of phospholipids and the analysis of their fatty acid composition. Higher levels of triglycerides, carotenoids, and linoleic (18: 2n-6) acid in eggs were associated with improved survival to zoea III. Linoleic acid was higher in spawns from the high survival group in both neutral and polar fractions and in most of the phospholipid classes analyzed. Docosahexanoic acid (DHA) was not related to survival to zoea, probably because its content was high enough (> 15% of total fatty acids) to satisfy embryo and early larval development needs. A high content of eicosapentaenoic acid (EPA) was found in phosphatidylethanolamine, lysophosphatidylethanolamine, phosphatidylserine, and phosphatidylinositol compared to other phospholipid classes, suggesting a specific role of EPA in these lipids. These results describe the specific phospholipid composition of penaeid eggs and could (potentially) be used as predictive indicators of larval quality for research and production purposes MH - Argentina MH - France MH - Mexico|Baja California Sur PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Fisheries U5 - J;Article AV - English IS - 0967-6120 UR - ISI:000178530800007 L2 - carotenoid;larval culture;larval quality;phospholipid;triglycerides;RED-SEA BREAM; REPRODUCTIVE-PERFORMANCE; SEED PRODUCTION; PECTEN-MAXIMUS; BROODSTOCK; PRAWN; FISH; DIETS; PHOSPHOLIPIDS; METABOLISM SO - Aquaculture International 2001 ;9(6):531-543 3877 UI - 12442 AU - Palacios EG AU - Monhemius AJ AD - Inst Politecn Nacl, EISQIE, Dept Ingn Met, Mexico City 07738, DF, MexicoUniv London Imperial Coll Sci Technol & Med, RSM, London SW7 2BP, EnglandPalacios, EG, Inst Politecn Nacl, EISQIE, Dept Ingn Met, A P 75-616, Mexico City 07738, DF, Mexico TI - Infrared spectroscopy of metal carboxylates I. Determination of free acid in solution AB - High-purity metal oxides can be produced by hydrolysis at high temperatures of metal carboxylates in a process called hydrolytic stripping. The process has potential application both in the field of extractive metallurgy and in the production of oxide materials such as pigments, catalysts, ceramics and magnetic oxides. The nature of the solids precipitated has a strong dependence on the composition and structure of the metal carboxylates involved in the reaction. In this work, infrared spectroscopy has been used for the quantitative analysis of organic solutions containing Versatic 10 (TM), as a first step in the speciation of the metal carboxylate, solutions used in the hydrolytic stripping process for the precipitation of magnetic oxides. Based on Beer's law, the characteristic nuC=O bands for the monomeric and dimeric forms of Versatic acid were used to measure the concentration of the acid in Escaid 110 (TM) solutions at temperatures in the range 20-200 degreesC, and thus obtain equations allowing the estimation of the free acid present in metal carboxylate solutions. It was found that the molar absorptivity (epsilon (D)) Corresponding to the fundamental C=O stretching vibration of the dimeric form of Versatic acid depends strongly on temperature over the range 20-200 'C, while that corresponding to the monomeric form (epsilon (M)). remains essentially constant with respect to temperature over the same range. Both species obey Beer's law over the entire range of concentration investigated. According to Beer's law, equations of the form [V-10] = alphaA(nuM) +betaA(nuD). were obtained for a given temperature. The accuracy of these equations was tested against Versatic acid solutions of known concentrations, the error in the prediction was always found to be less than 8%. Thus, the equations obtained allow the estimation of the free Versatic acid present in metal carboxylate solutions at given specific temperatures. (C) 2001 Elsevier Science BN. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0304-386X UR - ISI:000172016700001 SO - Hydrometallurgy 2001 ;62(3):135-143 3878 UI - 14954 AU - Paneque A AU - Fernandez-Bertran J AU - Reguera E AU - Yee-Madeira H AD - IPN, Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoUniv Havana, Inst Mat & Reagents, Havana, CubaIPN, Sch Math & Phys, Mexico City 11500, DF, MexicoCtr Pharmaceut Chem, Havana, CubaReguera, E, IPN, Ctr Appl Sci & Adv Technol, Legaria 694,Col Irrigac, Mexico City 11500, DF, Mexico TI - Mechanochemical synthesis of hemin-imidazole complexes AB - Solid state reactions of hemin and imidazole were performed by milling the crystalline materials in an agate mortar. The process was monitored by i.r., x.r.d. and Mossbauer spectroscopies. Samples with different hemin to imidazole molar ratios were studied. The interactions of imidazole with the central Fe atom and with the propionic acid groups in the periphery of the hemin molecule were detected. The latter interactions are suppressed by washing with MeOH. Complexes with 1:2 and 1:4 hemin-to-imidazole molar ratios were identified MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0340-4285 UR - ISI:000165089500014 L2 - PROTON-TRANSFER; SOLID-STATE; MOSSBAUER-SPECTRA; PORPHYRINS SO - Transition Metal Chemistry 2001 ;26(1-2):76-80 3879 UI - 12591 AU - Papenbrock T AU - Seligman TH AD - Ctr Int Ciencias, Cuernavaca, Morelos, MexicoUniv Washington, Inst Nucl Theory, Seattle, WA 98195, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoPapenbrock, T, Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USA TI - Invariant manifolds and collective coordinates AB - We introduce suitable coordinate systems for interacting many-body systems with invariant manifolds. These are Cartesian in coordinate and momentum space and chosen such that several components are identically zero for motion on the invariant manifold. In this sense these coordinates are collective. We make a connection to Zickendraht's collective coordinates and present certain configurations of few-body systems where rotations and vibrations decouple from single-particle motion. These configurations do not depend on details of the interaction MH - Mexico|Morelos MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000171597000023 L2 - CHAOTIC SYSTEMS; BODY SYSTEMS; NUCLEI; SYNCHRONIZATION; QUANTIZATION; COEXISTENCE; DYNAMICS; BILLIARD; ORBITS; STATES SO - Journal of Physics A-Mathematical and General 2001 ;34(36):7423-7430 3880 UI - 12925 AU - Parant J AU - Chavez-Reyes A AU - Little NA AU - Yan W AU - Reinke V AU - Jochemsen AG AU - Lozano G AD - Univ Texas, MD Anderson Canc Ctr, Dept Mol Genet, Sect Canc Genet, Houston, TX 77030, USAUniv Autonoma Nuevo Leon, Sch Biol Sci, Dept Microbiol & Immunol, Monterrey, NL, MexicoLeiden Univ, Med Ctr, Dept Mol & Cell Biol, NL-2300 RA Leiden, NetherlandsLeiden Univ, Med Ctr, Ctr Biomed Genet, NL-2300 RA Leiden, NetherlandsLozano, G, Univ Texas, MD Anderson Canc Ctr, Dept Mol Genet, Sect Canc Genet, Box 11,1515 Holcombe Blvd, Houston, TX 77030 USA TI - Rescue of embryonic lethality in Mdm4-null mice by loss of Trp53 suggests a nonoverlapping pathway with MDM2 to regulate p53 AB - The p53 protein can inhibit cell cycling or induce apoptosis, and is thus a critical regulator of tumorigenesis'. This protein is negatively regulated by a physical interaction with MDM2, an E3 ubiquitin ligase(2-4). This interaction is critical for cell viability; loss of Mdm2 causes cell death in vitro and in vivo in a p53-dependent manner(5-7). The recently discovered(8) MDM2-related protein MDM4 (also known as MDMX) has some of the same properties as MDM2. MDM4 binds and inhibits p53 transcriptional activity in vitro. Unlike MDM2, however, MDM4 does not cause nuclear export or degradation of p53 (refs. 9,10). To study MDM4 function in vivo, we deleted Mdm4 in mice. Mdm4-null mice died at 7.5-8.5 dpc, owing to loss of cell proliferation and not induction of apoptosis. To assess the importance of p53 in the death of Mdm4(-/-) embryos, we crossed in the Trp53-null allele. The loss of Trp53 completely rescued the Mdm4(-/-) embryonic lethality. Thus, MDM2 and MDM4 are nonoverlapping critical regulators of p53 in vivo. These data define a new pathway of p53 regulation and raise the possibility that increased MDM4 levels and the resulting inactivation of p53 contribute to the development of human tumors MH - Mexico|Nuevo Leon MH - Netherlands MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 114 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1061-4036 UR - ISI:000170781300025 L2 - MDM2-DEFICIENT MICE; ONCOPROTEIN MDM2; DEGRADATION; APOPTOSIS; REGION SO - Nature Genetics 2001 ;29(1):92-95 3881 UI - 12905 AU - Pardey PG AU - Koo B AU - Wright BD AU - Van Dusen ME AU - Skovmand B AU - Taba S AD - Int Food Policy Res Inst, Washington, DC 20006, USAUniv Calif Berkeley, Dept Agr & Resource Econ, Berkeley, CA 94720, USAUniv Calif Davis, Dept Agr & Resource Econ, Davis, CA 95616, USACIMMYT, Mexico City 06600, DF, MexicoPardey, PG, Int Food Policy Res Inst, 2033 K St NW, Washington, DC 20006 USA TI - Costing the conservation of genetic resources: CIMMYT's ex situ maize and wheat collection AB - Worldwide, the number of genebanks(1) and the amount of seed stored in them has increased substantially over the past few decades. Most attention is focused on the likely benefits of conservation, but conserving germplasm involves costs whose nature and magnitude are largely unknown. Moreover, these costs place a lower bound on the benefits deemed likely to justify the expense of conserving seed. In this study, we compile and use a set of cost data for wheat (Triticum aestivum L.) and maize (Zea mays L.), stored in the CIMMYT genebank to address a number of questions. The marginal costs of holding an existing accession for one more year are presented, along with the costs of conserving saved seed for the life of the genebank (taken here to be 40 yr), and in perpetuity We also investigated the scale economies evident in the CIMMYT genebank operation as a basis for assessing the economics of consolidating several genebanks. For accessions known to satisfy viability requirements, it costs just $0.19 and $0.93 to carry over an existing accession of wheat and maize respectively, for one more year; $7.19 and $30.24 to store an accession of each crop for the life of a genebank, and $10.26 and $58.85 to conserve accessions in perpetuity. Under baseline assumptions about interest rates, capital depreciation and regeneration regimes, the present value of conserving the existing accessions in perpetuity at CIMMYT is $8.86 million-$3.87 million for storing the 123 000 wheat accessions and $4.99 million for the 17 000 maize samples. Maintaining the current level of effort to distribute accessions free-of-charge to those who request them would cost an additional $5.28 million in perpetuity MH - USA MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170881200045 SO - Crop Science 2001 ;41(4):1286-1299 3882 UI - 12083 AU - Pardo A AU - Ramirez R AU - Smith K AU - Bustos M AU - Zlotnik A AU - Selman M AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04000, DF, MexicoDNAX Res Inst Mol & Cellular Biol Inc, Palo Alto, CA 94304, USAInst Nacl Enfermedades Resp, Mexico City, DF, Mexico TI - Overexpression of lung CCL18 chemokine in hypersensitivity pneumonitis (HP) MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000172372501397 SO - Molecular Biology of the Cell 2001 ;12():256A-256A 3883 UI - 12651 AU - Pardo A AU - Smith KM AU - Abrams J AU - Coffman R AU - Bustos M AU - McClanahan TK AU - Grein J AU - Murphy EE AU - Zlotnik A AU - Selman M AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoDNAX Res Inst Mol & Cellular Biol Inc, Palo Alto, CA 94304, USASelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502,Col Secc XVI, Mexico City 14080, DF, Mexico TI - CCL18/DC-CK-1/PARC up-regulation in hypersensitivity pneumonitis AB - Hypersensitivity pneumonitis (HP) is a lung inflammatory disorder characterized by accumulation of T lymphocytes. However, the mechanisms implicated in this process remain undefined. We examined the expression of dendritic cell (DC)derived CC chemokine I (CK1)/CCL18, a chemokine putatively involved in naive T cell recruitment, in lungs from 10 patients with HP, 9 patients with idiopathic pulmonary fibrosis (IPF), and 20 healthy lungs. CCL18 was measured by real-time quantitative PCR and localized in lungs by in situ hybridization and immunohistochemistry. CCL18 expression was significantly increased in lungs affected by HP in comparison with lungs affected by IPF (2,085 +/- 393 vs. 1,023 +/- 110; P <0.05) and controls (2,085 +/- 393 vs. 467 +/- 94; P <0.01). Macrophages, DCs, and alveolar epithelial cells were the main sources of CCL18. There was a direct correlation between the levels of tissue CCL18 and the number of lymphocytes in the bronchoalveolar lavage fluids. High levels of CCL18 were detected in the subacute rather than the chronic phase of HP. These findings suggest a role for CCL18 in the pathogenesis of HP MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 35 U4 - Cell Biology;Hematology;Immunology U5 - J;Article AV - English IS - 0741-5400 UR - ISI:000171467500016 L2 - chemokines;T lymphocytes;cell trafficking;allergic alveolitis;IDIOPATHIC PULMONARY FIBROSIS; CHEMOKINE PARC; T-CELLS; LUNG; CLASSIFICATION; LYMPHOCYTES; EXPRESSION; ALVEOLITIS; PATTERN SO - Journal of Leukocyte Biology 2001 ;70(4):610-616 3884 UI - 12170 AU - Parga JR AU - Valenzuela JL AU - Muzquiz GG AU - Ojebuoboh FK AD - Inst Tecnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, MexicoUniv Sonora, Hermosillo, Sonora, MexicoAsarco Inc, Denver, CO, USAParga, JR, Inst Tecnol Saltillo, Dept Met Mecan, Av Venustiano Carranza, Saltillo 25280, Coahuila, Mexico TI - Recycling lead to recover refractory precious metals AB - Lead recycling has many benefits. For example, it provides an alternative to virgin lead, thereby avoiding the environmental impacts of primary lead smelting. In addition, as with other secondary metal operations, it consumes less energy at a lower cost than primary production. An emerging process has been evaluated in which these attributes are leveraged to process refractory precious metals ores. Direct cyanidation of refractory gold and silver ore yields poor gold and silver recoveries. In fact, some ores are simply not amenable to direct cyanidation. The process described in this paper consists of smelting lead-bearing material together with argentopyrite concentrate that contains precious metals, Sodium carbonate is used as a fluxing agent and scrap iron is used as a reductant. The reaction product is molten lead bullion enriched with the precious metals. Smelting recoveries of both silver and gold can be as high as 98% MH - Mexico|Coahuila MH - Mexico|Sonora MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 1047-4838 UR - ISI:000172774400004 SO - Jom-Journal of the Minerals Metals & Materials Society 2001 ;53(12):19-21 3885 UI - 12404 AU - Parga JR AU - Cocke DL AD - Technol Inst Saltillo, Dept Met & Sci Mat, Saltillo 25000, Coahuila, MexicoLamar Univ, Dept Chem & Chem Engn, Beaumont, TX 77710, USAParga, JR, Technol Inst Saltillo, Dept Met & Sci Mat, V Carranza 2400, Saltillo 25000, Coahuila, Mexico TI - Oxidation of cyanide in a hydrocyclone reactor by chlorine dioxide AB - The greatest amounts of cyanide-containing wastes are produced by precious metals milling operations, the electroplating industry and coal processing or coking effluents processes. Because of high toxicity and to comply with federal and state regulations, the treatment of wastewater is required before safe discharge of cyanide wastes. In this regard, the gas-sparged hydrocyclone (GSH) has been tested as a reactor for the treatment of cyanide solutions for cyanide destruction by oxidation with the use of chlorine dioxide gas (ClO2). The results show oxidation efficiencies of free cyanide approached 99% at all pH values in 5 min. The use of NaCl was also considered for the generation of chlorine dioxide. Excellent performance appears to offer operational and cost advantages over conventional processes MH - Mexico|Coahuila MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical;Water Resources U5 - J;Article AV - English IS - 0011-9164 UR - ISI:000172216000008 L2 - oxidation;cyanide destruction;hydrocyclone reactor;chlorine dioxide;WASTE-WATER; REMOVAL SO - Desalination 2001 ;140(3):289-296 3886 UI - 12235 AU - Parmananda P AU - Mahara H AU - Amemiya T AU - Yamaguchi T AD - Natl Inst Adv Ind Sci & Technol AIST, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058565, JapanUAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoParmananda, P, Natl Inst Adv Ind Sci & Technol AIST, Nanotechnol Res Inst, AIST Cent 5-2,1-1-1 Higashi, Tsukuba, Ibaraki 3058565, Japan TI - Resonance induced pacemakers: A new class of organizing centers for wave propagation in excitable media AB - Propagation of waves in an extended excitable system is considered. It is shown that traveling wave fronts can be triggered and maintained via local periodic modulations of an appropriate system parameter. For a finite range of perturbation frequencies, this new class of pacemakers introduces spatiotemporal self-organization in an otherwise quiescent medium. Excitation waves of activity similar to those observed in heart tissue cultures and other biological preparations can emerge in the presence of these pacemakers MH - Japan MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000172545400047 L2 - BELOUSOV-ZHABOTINSKY REACTION; SPIRAL WAVES; SYSTEM; MUSCLE SO - Physical Review Letters 2001 ;8723(23): 3887 UI - 12761 AU - Parmananda P AU - Hudson JL AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoUniv Virginia, Dept Chem Engn, Charlottesville, VA 22903, USAParmananda, P, Univ Autonoma Estado Morelos, Fac Ciencias, Ave Univ 1001,Col Chamilpa, Cuernavaca, Morelos, Mexico TI - Controlling spatiotemporal chemical chaos using delayed feedback AB - Control of chemical chaos in a spatially extended system mimicking CO oxidation on a Pt(110) single-crystal surface is achieved using delayed feedback techniques. For appropriate parameter values the uncontrolled model system exhibits both amplitude and phase turbulence. Superimposing a delayed feedback on the natural dynamics, suppression of spatiotemporal complexity is attained via stabilization of ordered states consisting of stable patterns MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000171136400108 L2 - CONTROLLING TURBULENCE; SYSTEMS SO - Physical Review e 2001 ;6403(3): 3888 UI - 11945 AU - Parra-Vega V AU - Rodriguez-Angeles A AU - Arimoto S AU - Hirzinger G AD - CINVESTAV, Secc Mecatron, Mexico City 07000, DF, MexicoUniv Twente, NL-7500 AE Enschede, NetherlandsRitsumeikan Univ, Shiga, JapanGerman Aerosp Ctr DLR, Inst Robot & Mechatron, Stuttgart, GermanyParra-Vega, V, CINVESTAV, Secc Mecatron, AP 14-740, Mexico City 07000, DF, Mexico TI - High precision constrained grasping with cooperative adaptive handcontrol AB - A method for high precision constrained object manoeuvering for non-redundant rigid multifinger hands is proposed. A passivity-based adaptive cooperative control scheme carries out compensation of all uncertain inertial and dynamic friction forces to guarantee asymptotic tracking of all contact forces and joint position-orientation trajectories over orthogonal force- and position-based impedance error manifolds. Optimal internal and external force trajectories are obtained to minimize the contact forces onto the constrained object while exerting a given desired contact force onto the environment. The simulation study of two robot fingers manipulating a constrained object for combined fast and slow velocity regimes shows that when the dynamic friction compensation is turned on tracking errors decrease tenfold MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - Netherlands PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence;Robotics U5 - J;Article AV - English IS - 0921-0296 UR - ISI:000173513000001 L2 - grasping;adaptive control;passivity;high precision;dynamic friction;DAE;ROBOT MANIPULATORS; STABILITY; FRICTION; TRACKING; SYSTEMS SO - Journal of Intelligent & Robotic Systems 2001 ;32(3):235-254 3889 UI - 12659 AU - Parra-Vega V AU - Hirzinger G AD - CINVESTAV, Secc Mecatron, Mexico City 14000, DF, MexicoDLR, Inst Robot & Mechatron, Wesseling, GermanyParra-Vega, V, CINVESTAV, Secc Mecatron, Mexico City 14000, DF, Mexico TI - Chattering-free sliding mode control for a class of nonlinear mechanical systems AB - Second-order sliding mode control (2-smc) and dynamic sliding mode control (dsmc) eliminate the disturbing characteristic of chattering in static sliding mode control under the assumption that the derivative of the sliding surface is available or complex inequalities at the acceleration level can be constructed. In this paper, passivity-based adaptive and non-adaptive chattering-free sliding mode controllers are proposed assuming that the upper bound of the norm of the derivative of the sliding surface is available, a weaker and easy to implement assumption in comparison to those of 2-smc and dsmc. The closed-loop system accounts explicitly for the invariance condition without reaching phase, and therefore far a desired transient response with global exponential convergence of tracking errors. Preliminary experiments are presented. Copyright (C) 2001 John Wiley & Sons, Ltd MH - Germany MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000171522200004 L2 - chattering-free sliding mode control;adaptive control;robot manipulators;ROBOT MANIPULATORS; ATTENUATION SO - International Journal of Robust and Nonlinear Control 2001 ;11(12):1161-1178 3890 UI - 12928 AU - Parra-Vega V AU - Rodriguez-Angeles A AU - Hirzinger G AD - CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07000, DF, MexicoUniv Twente, Fac Appl Math, Syst Signals & Control Grp, NL-7500 AE Enschede, NetherlandsGerman Aerosp Ctr DLR, Inst Robot & Mechatron, D-82230 Wesseling, GermanyParra-Vega, V, CINVESTAV, Dept Ingn Elect, Secc Mecatron, AP 14-740, Mexico City 07000, DF, Mexico TI - Perfect position/force tracking of robots with dynamical terminal sliding mode control AB - According to a given performance criteria, perfect tracking is defined as the performance of zero tracking error in finite time. It is evident that robotic systems, in particular those that carry out compliant task, can benefit from this performance since perfect tracking of contact forces endows one or many constrained robot manipulators to interact dexterously with the environment. In this article, a dynamical terminal sliding mode controller that guarantees tracking in finite-time of position and force errors is proposed. The controller renders a dynamic sliding mode for all time and since the equilibrium of the dynamic sliding surface is driven by terminal attractors in the position and force controlled subspaces, robust finite-time convergence for both tracking errors arises. The controller is continuous; thus chattering is not an issue and the sliding mode condition as well the invariance property are explicitly verified. Surprisingly, the structure of the controller is similar with respect to the infinite-time tracking case, i.e., the asymptotic stability case, and the advantage becomes more evident because terminal stability properties are obtained with the same Lyapunov function of the asymptotic stability case by using more elaborate error manifolds instead of a more complicated control structure. A simulation study shows the expected perfect tracking and a discussion is presented. (C) 2001 John Wiley & Sons, Inc MH - Germany MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Robotics U5 - J;Article AV - English IS - 0741-2223 UR - ISI:000170778900002 L2 - FORCE CONTROL; ADAPTIVE-CONTROL; CONTROL-SYSTEMS; MANIPULATORS; MOTION; STABILIZATION; MANIFOLDS; TIME SO - Journal of Robotic Systems 2001 ;18(9):517-532 3891 UI - 11608 AU - Pasapera AM AU - Gutierrez-Sagal R AU - Garcia-Becerra R AU - Ulloa-Aguirre A AU - Savouret JF AD - Hosp Gineco Obstet Luis Castelazo Ayala, Inst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr SZ, Dept Reprod Biol, Mexico City, DF, MexicoCHU Bicetre, INSERM, Unite 135, Le Kremlin Bicetre, FrancePasapera, AM, IMSS, Res Unit Reprod Med, Apdo Postal 99-065,Unidad Independencia, Mexico City 10101, DF, Mexico TI - Transactivation of progestin- and estrogen-responsive promoters by 19-Nor progestins in African Green Monkey Kidney CV1 cells AB - New and more potent progestins and antiprogestins suitable for reproductive therapy and contraception are currently the target of intensive research. The design of such drugs has been hampered by the complex technology required for screening these compounds at the molecular level. To solve this problem, we developed an in vitro cell system that allows detection of the progestagenic effects of a given compound using a PRE2-TATA-CAT reporter vector transiently introduced in a cell line stably transfected with the rabbit progesterone receptor (PR). The African Green Monkey Kidney CV1 (AGMK-CV1) cell line was chosen because these cells do not express endogenous steroid receptors; the selected clone stably expressing the rabbit PR has been maintained in our laboratory for more than 2 yr without detectable losses in PR content and progestagenic response. The presence and function of the PR were assessed by immunohistochemical and saturation analyses as well as by monitoring transactivation of the PRE2-TATA-CAT reporter gene. In this cell line, the PR is expressed at a concentration of 0.170 fmol/mg of protein, and the receptor is localized within the cell nucleus in either the presence or absence of the potent synthetic progestin R5020. This PR-expressing cell system allowed study of the in vitro progestational activity of several 19-nor progestins. The antiprogestin RU486 inhibited CAT activity induced by R5020; norethisterone (NET), levonorgestrel (LNG), and gestodene (GSD) induced PRE2-TATA-CAT activity at concentrations similar to those of R5020, whereas NET A-ring-reduced metabolites induced CAT activity at an extent lower than (5alpha-NET) or similar (3beta,5alpha-NET) to that of the precursor compound. The PRE2-TATA-CAT induction by 17beta-estradiol was also analyzed and no crossreactivity was detected. However, when the ERE-VitA2-TK-CAT (estrogen-responsive element-vitel-logenin A2-thymidine kinase promoter-CAT) reporter vector and the estradiol receptor alpha or beta were cotransfected, CAT activity was induced in the presence of 17beta-estradiol, and NET tetrahydro-reduced derivatives. The results indicate that this AGMK-CV1-PR cell assay system appears to be suitable for measuring the effects of different synthetic progestins at the transcriptional level. In this assay system, NET, LNG, and GSD exhibit potent progestational effects at the transcriptional level. In the particular case of NET, the assay system allowed us to determine that the single or multiple hormonal transcriptional effects of this compound are partially mediated by its A-ring-reduced derivatives MH - France MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0969-711X UR - ISI:000174537500009 L2 - 19-Nor progestins;norethisterone;estrogen receptor;progesterone receptor;RING REDUCED METABOLITES; RECEPTOR-B ISOFORMS; BREAST-TUMOR CELLS; SYNTHETIC PROGESTINS; ORAL-CONTRACEPTIVES; IN-VITRO; 19-NORTESTOSTERONE DERIVATIVES; HORMONE RECEPTORS; MAMMALIAN-CELLS; CHO CELLS SO - Endocrine 2001 ;16(3):217-225 3892 UI - 13036 AU - Pashchenko MI AU - Lekht EE AU - Berulis II AD - Sternberg Astron Inst, Moscow 119899, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoPushchino Radio Astron Observ, Ctr Astro Space, PN Lebedev Phys Inst, Pushchino 142290, Moscow Oblast, RussiaPashchenko, MI, Sternberg Astron Inst, Univ Pr 13, Moscow 119899, Russia TI - Variability of the H2O maser emission in S255 AB - The paper reports the results of observations of the H2O maser in S255 carried out in 1982-1985 and 1990-2000 on the 22-meter telescope of the Pushchino Radio Astronomy Observatory. The H2O maser emission extends from -2 to 14 km/s and is mainly concentrated in three radial-velocity intervals. The velocity of the central group of emission features coincides with that of the molecular cloud, while the two lateral groups (blueshifted and redshifted) are positioned in the spectrum more or less symmetrically relative to the central feature. During the monitoring of S255, two phenomena were observed. First, the integrated flux of the H2O maser emission varied in a cyclic manner with a period of two to four years; this may be connected with activity of the protostar. Second, the fluxes of emission features (or groups of features) were anticorrelated. The emission of the three groups of features noted above dominated in succession. In some time intervals, a triplet spectral structure with anticorrelation between the fluxes of the lateral components and of the central and lateral components was observed. The flux anticorrelation between groups of features and individual features could be due to competition between spatial emission pumping modes in a nonuniform Keplerian disk. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000170615900003 L2 - METHANOL MASERS; DISCOVERY; OBJECTS; GHZ SO - Astronomy Reports 2001 ;45(8):600-610 3893 UI - 12586 AU - Pashnev A AU - Rosales JJ AU - Tkach VI AU - Tsulaia M AD - Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, RussiaUniv Guanajuato, Inst Fis, Guanajuato 05315970, MexicoPashnev, A, Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia TI - n=4 supersymmetry for the FRW model AB - In this work we construct the n=4 extended local conformal time supersymmetry for the Friedmann-Robertson-Walker (FRW) cosmological model. This is based on a superfield construction of the action, which is invariant under world-line local n=4 supersymmetry with SU(2)(local) x SU(2)(global) internal symmetry. It is shown that the supersymmetric action has the form of the localized (or superconformal) version of the action for n=4 supersymmetric quantum mechanics. This superfield procedure provides a well defined scheme for including supermatter MH - Mexico|Guanajuato MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000171654700084 L2 - QUANTUM-MECHANICS; SUPERCONFORMAL MECHANICS; BREAKING SO - Physical Review D 2001 ;6408(8): 3894 UI - 12745 AU - Pastor JA AU - Castellanos A AU - Myerburg RJ AU - Pallares DS AD - Univ Miami, Sch Med, Div Cardiol D39, Miami, FL 33101, USACtr Metab Treatment, Mexico City, DF, MexicoCastellanos, A, Univ Miami, Sch Med, Div Cardiol D39, POB 016960, Miami, FL 33101 USA TI - Apparent misplacement of chest electrode on left leg: A unique example of electrodal confusion AB - A patient with an anterior wall myocardial infarction had a false pattern of inferior wall infarction when the left leg electrode was placed on the chest, in between the V-2 and V-3 electrodes. This unique example of electrodal confusion was, at first glance, misinterpreted as resulting from switching of the left leg and V-2 electrodes MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 3 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000171374300029 SO - American Journal of Cardiology 2001 ;88(7):829-+ 3895 UI - 13887 AU - Patrizio P AU - Leonard DGB AU - Chen KL AU - Hernandez-Ayup S AU - Trounson AO AD - Univ Penn, Ctr Reprod Med & Surg, Philadelphia, PA 19104, USAUniv Penn, Dept Pathol & Lab Med, Philadelphia, PA 19104, USAIst Estudio Concepc Humana, Monterrey, MexicoMonash Univ, Inst Reprod & Dev, Melbourne, Vic 3004, AustraliaPatrizio, P, Hosp Univ Penn, Dept Obstet & Gynecol, 3400 Spruce St,106 Dulles Bldg, Philadelphia, PA 19104 USA TI - Larger trinucleotide repeat size in the androgen receptor gene of infertile men with extremely severe oligozoospermia AB - Androgens are significant regulators of human spermatogenesis. Their action is mediated through the androgen receptor (AR), which binds to the androgen responsive element on DNA and regulates gene transcription. Men become infertile with spinobulbar muscular atrophy (Kennedy disease) caused by a trinucleotide repeat expansion, greater than or equal to 40 CAG repeats, in the AR gene located on the X chromosome. In this prospective study, we investigated whether the variable size, larger repeats, of this trinucleotide could alter AR function and result in impaired spermatogenesis. A total of 69 infertile men were studied. Clinical and laboratory analysis showed idiopathic, nonobstructive azoospermia in 16 men, extremely severe oligozoospermia in 27 men (<1 million sperm/mL), and severe oligozoospermia in 26 men (1 to 5 million sperm/mL). Fertile control men (n = 45) were selected by documented paternity proven by linkage analysis; Leukocyte DNA was analyzed by polymerase chain reaction (PCR) amplification across the AR repeat region. Accurate size determination of the PCR product using an ABI 373 DNA sequencer allowed precise calculation of CAG repeat sizes. The AR gene was not analyzed for other types of mutations. The difference in CAG repeat size between infertile men and proven fertile controls was statistically significant, P = .03. Patients with extremely severe oligozoospermia had significantly longer CAG repeat tracts (mean, 25.4 +/- 4.0; P = .0005; range 20-39) than controls (mean, 22 +/- 2.8; range 12-30) or patients with severe oligozoospermia (mean, 22.2 +/- 2.3; range 18-26). None of the 26 infertile men with sperm counts <1 million/mL had less than or equal to 19 CAG, repeats compared with 6 out of 45 controls (13%; P = .06). This study suggests that some men with severe impairment of spermatogenesis have longer trinucleotide repeats in the AR gene. Although direct evidence is missing, lower affinity between androgen and the AR protein or decreased AR protein availability with longer repeats could be responsible for a diminished androgen effect on spermatogenesis. Two of the patients in the extremely severe oligozoospermia group had 35 and 39 CAG repeats, respectively (normal range is 11 to 33). Although not yet considered a mutation, longer trinucleotide repeats are unstable and might either expand or contract between generations. If they expand, conception through the use of intracytoplasmic sperm injection (ICSI), could result in the son of an ICSI daughter being affected not only by infertility hut also by Kennedy disease MH - Australia MH - Mexico|Nuevo Leon MH - USA PB - LAWRENCE: AMER SOC ANDROLOGY, INC RP - NOT IN FILE U3 - TC 33 U4 - Andrology U5 - J;Article AV - English IS - 0196-3635 UR - ISI:000168203300012 L2 - ICSI;assisted reproduction;Kennedy disease;male infertility;CAG REPEAT; INSENSITIVITY SYNDROME; PROSTATE-CANCER; TRANSACTIVATION; AZOOSPERMIA; RESISTANCE; EXPANSION; MUTATIONS; LENGTH SO - Journal of Andrology 2001 ;22(3):444-448 3896 UI - 13170 AU - Patrykiejew A AU - Sokolowski S AU - Sokolowska Z AU - Pizio O AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandPolish Acad Sci, Inst Agrophys, PL-20257 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoPatrykiejew, A, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - A simple model of adsorption by swelling porous materials: application of a density functional approach AB - We apply a density functional approach to describe adsorption of fluids by swelling porous materials. We investigate adsorption at supercritical temperatures, and discuss possible changes in the phase behaviour of the fluid which result from the volume changes of the pores during the adsorption process. In particular, we show that the swelling may cause splitting of the capillary condensation hysteresis loop into two branches; the first of them is connected with the capillary condensation in a 'collapsed' pore and the second one is a result of the swelling MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000170138500006 L2 - MOLECULAR-MODEL; MONTE-CARLO; CLAY; SIMULATIONS; INTERFACE; SILICATES; SMECTITE; SYSTEMS; FORCES; WATER SO - Journal of Physics-Condensed Matter 2001 ;13(28):6151-6164 3897 UI - 14398 AU - Pattabi M AU - Sebastian PJ AU - Mathew X AD - UNAM, CIE, Solar Hydrogen Fuel Cell, Temixco 62580, Morelos, MexicoMangalore Univ, Dept Mat Sci, Mangalagangotri 574199, Karnataka, IndiaSebastian, PJ, UNAM, CIE, Solar Hydrogen Fuel Cell, Temixco 62580, Morelos, Mexico TI - Synthesis and characterization of W-x(CO)(n) electrocatalyst for application in a fuel cell electrode AB - W-x(CO)(n) electrocatalyst was synthesized in a liquid medium (xylene) at about 140 degreesC. The physico-chemical as well as kinetic properties of the compound were characterized to study its possible application in a fuel cell electrode. Techniques such as x-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDAX) and Fourier transform infrared spectroscopy (FTIR) were utilized to analyze the structural, morphological and compositional characteristics, whereas cyclic as well as linear voltametry was employed to study the kinetic properties of the catalyst. The experimental results indicated formation of amorphous or very small particles of W-x(CO)(n), probably with a range of compositions. The catalyst generally exhibits porous nature with noticeable catalytic activity for the oxygen reduction reaction MH - India MH - Mexico|Morelos PB - MONTREAL: ECOLE POLYTECHNIQUE MONTREAL RP - NOT IN FILE U3 - TC 3 U4 - Electrochemistry;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1480-2422 UR - ISI:000166681200003 L2 - W(CO)(6);W-x(CO)(n);fuel cell;oxygen reduction;voltametry;TRANSITION-METAL SULFIDES; OXYGEN-REDUCTION; CATALYSTS; ELECTROREDUCTION SO - Journal of New Materials for Electrochemical Systems 2001 ;4(1):7-9 3898 UI - 14514 AU - Pattabi M AU - Castellanos RH AU - Castillo R AU - Ocampo AL AU - Moreira J AU - Sebastian PJ AU - McClure JC AU - Mathew X AD - UNAM, CIE, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoMangalore Univ, Dept Mat Sci, Mangalagangothri 574199, IndiaUniv Texas, Dept Met & Mat Engn, El Paso, TX 79968, USAPattabi, M, UNAM, CIE, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Electrochemical characterization of tungsten carbonyl compound for oxygen reduction reaction AB - The results of electrochemical studies carried out on W-x(CO)(n) electrocatalyst are presented in this article. W-x(CO)(n) was synthesized from W(CO)(6) in xylene at 140 degreesC. The kinetic studies were carried out in 0.5 M H2SO4 solution under a three-electrode configuration. Linear voltametry studies on W-x(CO)(n) reveal significant catalytic activity of the material for oxygen reduction. Koutecky-Levich analysis of the voltametry data shows that the reaction follows first-order kinetics and the value of the Koutecky-Levich slope indicates a multi-electron charge transfer in the oxygen reduction reaction. The value of Tafel slope is Found to be - 120 mV/decade from the mass-transfer-corrected Tafel plots. The charge transfer coefficient and exchange current density were found to be 0.66 and 8.4 x 10(-5) A/cm(2), respectively. (C) 2000 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved MH - India MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000166366700011 L2 - W-x(CO)(n);oxygen reduction;voltametry;Tafel plot;fuel cell;catalyst;TRANSITION-METAL SULFIDES; FUEL-CELLS; ELECTROREDUCTION; ELECTRODES; CATALYSTS; ELECTROCATALYSIS; O-2 SO - International Journal of Hydrogen Energy 2001 ;26(2):171-174 3899 UI - 13670 AU - Pavon D AU - Sussman RA AD - Univ Autonoma Barcelona, Fac Ciencias, Dept Fis, E-08193 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPavon, D, Univ Autonoma Barcelona, Fac Ciencias, Dept Fis, E-08193 Barcelona, Spain TI - Relaxation versus collision times in the cosmological radiative era AB - We consider the Lemaitre-Tolman-Bondi metric with an inhomogeneous viscous fluid source satisfying the equation of state of an interactive mixture of radiation and matter. Assuming conditions;prior to the decoupling era, we apply extended irreversible thermodynamics (EIT) to this mixture. Using the full transport equation of EIT we show that the relaxation time of shear viscosity can be several orders of magnitude larger than the Thomson collision time between photons and electrons. A comparison with the 'truncated' transport equation for these models reveals that the latter cannot properly describe the decoupling of matter and radiation MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000168790200003 L2 - THERMODYNAMICS; FLUID; QUINTESSENCE; EVOLUTION SO - Classical and Quantum Gravity 2001 ;18(9):1625-1636 3900 UI - 13144 AU - Payne GF AU - Chen TH AU - Vazquez-Duhalt R AU - Bentley WE AU - Smith PJ AD - Univ Maryland, Ctr Agr Biotechnol, College Pk, MD 20742, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Mexico City 04510, DF, MexicoUniv Maryland, College Pk, MD 20742, USAUniv Maryland Baltimore Cty, Baltimore, MD 21228, USA TI - Combinatorial approach to biopolymer coupling and crosslinking MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824700547 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U119-U119 3901 UI - 14558 AU - Pedraza-Alva G AU - Sawasdikosol S AU - Liu YC AU - Merida LB AU - Cruz-Munoz ME AU - Oceguera-Yanez F AU - Burakoff SJ AU - Rosenstein Y AD - UNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoDana Farber Canc Inst, Boston, MA 02115, USALa Jolla Inst Allergy & Immunol, San Diego, CA 92121, USARosenstein, Y, UNAM, Inst Biotecnol, APDO Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Regulation of Cbl molecular interactions by the co-receptor molecule CD43 in human T cells AB - CD43, one of the most abundant glycoproteins on the T cell surface, has been implicated in selection and maturation of thymocytes and migration, adhesion, and activation of mature T cells. The adapter molecule Cbl has been shown to be a negative regulator of Pas, Furthermore, it may also regulate intracellular signaling through the formation of several multi-molecular complexes. Here we investigated the role of Cbl in the CD43-mediated signaling pathway in human T cells. Unlike T cell receptor signaling, the interaction of the adapter protein Cbl with Vav and phosphatidylinositol 3-kinase, resulting from CD QS-specific signals, is independent of Cbl tyrosine phosphorylation, suggesting an alternative mechanism of interaction. CD43 signals induced a Cbl serine phosphorylation-dependent interaction with the tau -isoform of 14-3-3. protein. Protein kinase C-mediated Cbl serine phosphorylation was required for this interaction, because the PKC inhibitor RO-31-8220 prevented it, as well as 14-3-3 dimerization. Moreover, mutation of Cbl serine residues 619, 623, 639, and 642 abolished the interaction between Cbl and 14-3-3, Overexpression of Cbl in Jurkat cells inhibited the CD43-dependent activation of the mitogen-activated protein kinase (MAPK) pathway and AP-1 transcriptional activity, confirming nevertheless a negative role for Cbl in T cell signaling. However, under normal conditions, PKC activation resulting from CD43 engagement was required to activate the MAPK pathway, suggesting that phosphorylation of Cbl on serine residues by PKC and its association with 14-3-3 molecules may play a role in preventing the Cbl inhibitory effect on the Ras-MAPK pathway. These data suggest that by inducing its phosphorylation on serine residues, CD43-mediated signals may regulate the molecular associations and functions of the Cbl adapter protein MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000166280700098 L2 - PHOSPHOTYROSINE-BINDING DOMAIN; PROTEIN-KINASE-C; GROWTH-FACTOR RECEPTOR; PROTOONCOGENE PRODUCT; TYROSINE PHOSPHORYLATION; SIGNAL-TRANSDUCTION; PHOSPHATIDYLINOSITOL 3-KINASE; MONOCLONAL-ANTIBODY; NEGATIVE REGULATOR; ANTIGEN RECEPTOR SO - Journal of Biological Chemistry 2001 ;276(1):729-737 3902 UI - 14227 AU - Peek AS AU - Souza V AU - Eguiarte LE AU - Gaut BS AD - Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoPeek, AS, Cytoclonal Pharmaceut Inc, 9000 Harry Hines Blvd, Dallas, TX 75235 USA TI - The interaction of protein structure, selection, and recombination on the evolution of the type-1 fimbrial major subunit (fimA) from Escherichia coli AB - Fimbrial adhesins allow bacteria to interact with and attach to their environment. The bacteria possibly benefit from these interactions, but all external structures including adhesins also allow bacteria to be identified by other organisms. Thus adhesion molecules might. be under multiple forms of selection including selection to constrain functional interactions or evolve novel epitopes to avoid recognition. We address these issues by studying genetic diversity in the Escherichia coli type-1 fimbrial major subunit, fimA. Overall, sequence diversity in fimA is high (pi = 0.07) relative to that in other E. coli genes. High diversity is a function of positive diversifying selection, as detected by d(N)/d(S) ratios higher than 1.0, and amino acid residuces subject to diversifying selection are nonrandomly clustered on the exterior surface of the peptide, In addition, McDonald and Kreitman tests suggest that there has been historical but not current directional selection at fimA between E. coli and Salmonella. Finally, some regions of the fimA peptide appear to be under strong structural constraint within E. coli, particularly the interior regions of the molecule that is involved in subunit to subunit interaction. Recombination also plays a major role contributing to E, coli fimA allelic variation and estimates of recombination (2N(e)c) and mutation (2N(e)mu) are about the same. Recombination may act to separate the diverse evolutionary forces in different regions of the fimA peptide MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0022-2844 UR - ISI:000167178700010 L2 - diverifying selection;surface protein;Escherichia coli genetic variation;POSITIVE DARWINIAN SELECTION; NATURAL-POPULATIONS; NUCLEOTIDE-SEQUENCE; STATISTICAL TESTS; GENE CONVERSION; DNA-SEQUENCE; POLYMORPHISM; SITES; DROSOPHILA; DIVERGENCE SO - Journal of Molecular Evolution 2001 ;52(2):193-204 3903 UI - 13164 AU - Pelaez AI AU - Ribas-Aparicio RM AU - Gomez A AU - Rodicio MR AD - Univ Oviedo, Inst Univ Biotecnol, Area Microbiol, Dept Biol Fonct, E-33006 Oviedo, SpainInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City, DF, MexicoRodicio, MR, Univ Oviedo, Inst Univ Biotecnol, Area Microbiol, Dept Biol Fonct, E-33006 Oviedo, Spain TI - Structural and functional characterization of the recR gene of Streptomyces AB - The recR gene product is necessary for homologous recombination and recombinational DNA repair in eubacteria. We report the isolation and sequencing of the recR gene from Streptomyces coelicolor. It encodes a protein of 198 amino acids, with a predicted molecular mass of 22 kDa. The deduced amino acid sequence shows significant similarity to that of RecR proteins from other bacteria, including Escherichia coli and Bacillus subtilis. Like these, Streptomyces RecR contains potential helix-hairpin-helix, zinc finger and ATP-binding motifs, as well as the Toprim domain which is present also in topoisomerases of Types IA and II, primases and nucleases of the OLD family. The recR genes of Escherichia coli and Bacillus subtilis are immediately preceded by a small ORF (orf12 and orf107, respectively). An equivalent ORF (orf1) is also found in Streptomyces. S. lividans recR mutants, obtained either by insertional inactivation of recR or by deletion of the gene together with the preceding ORF, displayed increased sensitivity to DNA-damaging agents (such as UV light and methylmethanesulfonate), when compared with the wild-type strain. Both mutants could be complemented by the wild-type orf1recR genes and also by the recR gene alone. Based on these results, orf1 appears to be dispensable for the repair function of Streptomyces RecR. In studies of heterologous complementation, the B. subtilis recR region (orf107recR) was found to complement the S. lividans Delta orf1recR mutant, but the equivalent region from E. coli (orf12recR) could not. However. in the absence of orf107, B. subtilis recR was unable to restore the wild-type phenotype to the Streptomyces deletion mutant MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1617-4615 UR - ISI:000170115300011 L2 - Streptomyces coelicolor;Streptomyces lividans;recR;recombinational DNA repair;genetic complementation;RECOMBINATIONAL DNA-REPAIR; ESCHERICHIA-COLI; SEQUENCE-ANALYSIS; CLONING VECTORS; MOLECULAR-CLONING; BACILLUS-SUBTILIS; REPLICATION FORKS; CHROMOSOMAL DNA; PHYSICAL MAP; LIVIDANS SO - Molecular Genetics and Genomics 2001 ;265(4):663-672 3904 UI - 14077 AU - Pelaez MG AU - Teply ML AD - ITAM, Dept Math, Mexico City, DF, MexicoUniv Wisconsin, Dept Math Sci, Milwaukee, WI 53201, USA TI - On semihereditary and p.p. monoid rings MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0037-1912 UR - ISI:000167539300004 SO - Semigroup Forum 2001 ;62(3):399-402 3905 UI - 13571 AU - Pelaz S AU - Tapia-Lopez R AU - varez-Buylla ER AU - Yanofsky MF AD - Univ Calif San Diego, Sect Cell & Dev Biol, La Jolla, CA 92093, USANatl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoYanofsky, MF, Univ Calif San Diego, Sect Cell & Dev Biol, La Jolla, CA 92093 USA TI - Conversion of leaves into petals in Arabidopsis AB - More than 200 years ago, Goethe proposed that each of the distinct flower organs represents a modified leaf [1]. Support for this hypothesis has come from genetic studies, which have identified genes required for flower organ identity. These genes have been incorporated into the widely accepted ABC model of flower organ identity, a model that appears generally applicable to distantly related eudicots as well as monocot plants. Strikingly, triple mutants lacking the ABC activities produce leaves in place of flower organs, and this finding demonstrates that these genes are required for floral organ identity [2], However, the ABC genes are not sufficient for floral organ identity since ectopic expression of these genes failed to convert vegetative leaves into flower organs. This finding suggests that one or more additional factors are required [3, 4], We have recently shown that SEPALLATA (SEP) represents a new class of floral organ identity genes since the loss of SEP activity results in all flower organs developing as sepals [5], Here we show that the combined action of the SEP genes, together with the A and B genes, is sufficient to convert leaves into petals MH - USA MH - Mexico|Distrito Federal PB - CAMBRIDGE: CELL PRESS RP - NOT IN FILE U3 - TC 86 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0960-9822 UR - ISI:000169076300019 L2 - MADS BOX GENE; FLORAL-ORGAN IDENTITY; HOMEOTIC GENES; FLOWER; PROTEINS; FAMILY; PLANTS SO - Current Biology 2001 ;11(3):182-184 3906 UI - 13746 AU - Pena-Rodriguez G AU - Arenas AC AU - Hernandez RAM AU - Stolik S AU - Orea AC AU - Sinencio FS AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Phys Lab, Mexico City 11500, DF, MexicoUniv Francisco de Paula Santander, Cucuta, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoArenas, AC, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Phys Lab, Legaria 694,Colonia Irrigac, Mexico City 11500, DF, Mexico TI - Measurement of thermal diffusivity of bone, hydroxyapatite and metals for biomedical application AB - We present a microstructural study and thermal diffusivity measurements at room temperature in two different sections of bull dense bone, bull bone and commercial hydroxyapatite, the last two in powder form. A comparison tvas made between these measured values and those obtained from metallic samples frequently used in implants such as high purity titanium and 316L stainless steel. Our results show that the porosity and its orientation in the bone are two important factors for the heat flux through the bone. The hydroxyapatite, in compact powder form, presents a thermal diffusivity value very near to those obtained for the bone samples which gives a good thermal agreement between these materials. Finally, one order of magnitude of difference among the thermal diffusivity values of metallic samples and those corresponding values to bone and hydroxyapatite was obtained, this difference being greater in titanium than in stainless steel MH - Colombia MH - Mexico|Distrito Federal PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200108 L2 - SILICON; SOLIDS SO - Analytical Sciences 2001 ;17():S378-S381 3907 UI - 13962 AU - Pena M AU - Stasinska G AU - Medina S AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoObserv Paris, DAEC, F-92195 Meudon, FrancePena, M, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - Galactic planetary nebulae with Wolf-Rayet nuclei II. A consistent observational data set AB - We present high resolution spectrophotometric data for a sample of 34 planetary nebulae with [WC] spectral type central stars (WRPNe) in our Galaxy. The observed objects cover a wide range in stellar characteristics: early and late [WC] type stars, as well as:weak-emission line stars (WELS). Physical conditions in the nebulae (electron density and temperatures) have been obtained from various diagnostic line ratios, and chemical abundances have been derived with the usual empirical scheme. Expansion velocities were estimated in a consistent manner from the line profiles for most objects of the sample. A statistical study was developed for the derived data in order to find fundamental relationships casting some light on the evolutionary status of WRPNe. We found evidence for a strong electron temperature gradient in WRPNe which is related to nebular excitation. Such a gradient is not predicted in simple photoionization models. Abundance ratios indicate that there seems to be no preferential stellar mass for the Wolf-Rayet phenomenon to occur :in the nucleus of a planetary nebula. Two objects, M 1-25 and M 1-32, were found to have a very small Ne/O ratio, a property difficult to understand. We reexamined the relation between the nebular properties of the WRPNe and the spectral types of the central stars. Our data confirm the trend found by other authors of the electron density decreasing with decreasing spectral type, which was interpreted as evidence that [WC] stars evolve from late to early [WC] types. On the other hand, our data on the expansion velocities do not show the increase of expansion velocity with decreasing spectral type, that one might expect in such a scenario. Two objects with very late [WC] type central stars, K 2-16 and PM 1-188, do not follow the general density sequence, being of very low density for their spectral types. We suggest that the stars either underwent a late helium flash (the "born again" scenario) or that they have had a particularly slow evolution from the AGE. The 6 WELS of our sample follow the same density vs. [WC]-type relation as the bona fide WRPNe, but they tend to have smaller expansion velocities. Considerations about the evolutionary status of WELS must await the constitution of a larger observational sample. The analysis of the differences between the WRPNe in the Magellanic Clouds (distribution of [WC] spectral types, N/O ratios) and in the Galaxy indicates that metallicity affects the [WR] phenomenon in central stars of planetary nebulae MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167938200029 L2 - planetary nebulae : general;stars : Wolf-Rayet;planetary nebulae : individual : K 2-16, PM 1-188, M 1-32, M 3-15;INTERMEDIATE-MASS STARS; WC CENTRAL STARS; ABUNDANCE PATTERNS; MAGELLANIC-CLOUDS; SPECTRAL ANALYSES; EMISSION-LINES; EVOLUTION; CLASSIFICATION; PNE SO - Astronomy & Astrophysics 2001 ;367(3):983-994 3908 UI - 14217 AU - Pena MT AU - Garcilazo H AU - Riska DO AD - Univ Helsinki, Dept Phys, Helsinki 00014, FinlandEscuela Super Fis & Matemat, Mexico City 07738, DF, MexicoInst Super Tecn, Dept Fis, P-1096 Lisbon, PortugalCtr Fis Interaccoes Fundamentais, P-1096 Lisbon, PortugalRiska, DO, Univ Helsinki, Dept Phys, Siltavuorenpenger 20D, Helsinki 00014, Finland TI - The reaction pp -> pp eta and the eta-nucleon and nucleon-nucleon interactions AB - The pi, eta and rho exchange contributions to the cross section for the reaction pp --> pp eta near threshold are calculated, with a phenomenological description of the intermediate S11 (N(1535)) resonance for all exchange mechanisms. The final state interaction in the pp system is described by realistic nucleon-nucleon interaction models. The sensitivity of the results to the phenomenological models for the eta -nucleon transition amplitude and die nucleon-nucleon interaction is explored. The eta -exchange mechanism is found to play a dominant role. The off-shell behavior of the etaN --> etaN amplitude within the p exchange amplitude leads to a result significantly different from that obtained with the constant scattering length approximation. The two-nucleon amplitudes that are associated with the short-range components of the nucleon-nucleon interaction contribute significantly to the cross section. (C) 2001 Elsevier Science B.V. All rights reserved MH - Finland MH - Mexico|Distrito Federal MH - Portugal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000167202600016 L2 - PROTON-PROTON COLLISIONS; NEAR-THRESHOLD; PP->PP-ETA REACTION; CROSS-SECTION; MESON; PION; SCATTERING; NN; 3-CHANNEL; CURRENTS SO - Nuclear Physics A 2001 ;683():322-338 3909 UI - 12049 AU - Peralta MG AU - Wolf JHD AD - Univ Michoacana San Nicolas de Hidalgo, Fac Biol, Herbario, Morelia 58030, Michoacan, MexicoUniv Amsterdam, Inst Biodivers & Ecosyst Dynam, Hugo de Vries Lab, NL-1098 SM Amsterdam, NetherlandsPeralta, MG, Univ Michoacana San Nicolas de Hidalgo, Fac Biol, Herbario, Edificio R,Ciudad Univ, Morelia 58030, Michoacan, Mexico TI - Commercial bryophyte harvesting in the Monarch Butterfly Biosphere Reserve, Sierra Chincua, Michoacan, Mexico AB - Each Christmas season, the abundance of terrestrial bryophytes in the Abies-dominated forests of the Sierra Chincua, part of the Monarch Butterfly Biosphere Reserve, attracts moss gatherers. Bryophyte mats are harvested as ornamentals, packed, and sold at the central auction of Mexico City. In 1996, we followed a group of about 10 family, members in this activity and documented economic and ecological aspects. During the season they removed in total nearly 50 tons of fresh weight of bryophytes from the forest floor that was sold for approximately $3,500 USD, leaving behind a mosaic of gaps of bare soil in the mossy layer. The average gap size was 0.48 m(2) and extraction intensity varied between 0.5 and 4.1% of the total surface area (2.14% on average). In addition, over 11,000 Abies seedlings were unintentionally removed. We are conceive that the Mexican norm for bryophyte harvesting is not in line with current practices and we recommend the inclusion of guidelines for patch size, and that harvesters pay attention to accidental removal of tree seedlings MH - Mexico|Michoacan MH - Netherlands PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000173169600002 SO - Bryologist 2001 ;104(4):517-521 3910 UI - 12124 AU - Peraza-Luna F AU - Rodriguez-Mendiola M AU - rias-Castro C AU - Bessiere JM AU - Calva-Calva G AD - Inst Tecnol Agropecuario Jalisco, Ctr Invest & Grad Agropecuarios, Tlajomulco De Zuniga, Jalisco, MexicoIPN, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, MexicoEcole Natl Super Chim, Lab Chim Apliquee, Montpellier, FranceRodriguez-Mendiola, M, Inst Tecnol Agropecuario Jalisco, Ctr Invest & Grad Agropecuarios, Tlajomulco De Zuniga, Jalisco, Mexico TI - Sotolone production by hairy root cultures of Trigonella foenum-graecum in airlift with mesh bioreactors AB - 3-Hydroxy-4,5-dimethyl-2(5H)-furanone (sotolone) and 3-amino-4,5-dimethyl-2(5H)-furanone, the postulated precursor of sotolone, were detected in hairy root cultures of Trigonella foenum-graecum (fenugreek) by GC-MS. The hairy root cultures in both conical flasks and airlift with mesh bioreactors were achieved from hypocotyl of seedling by infection with Agrobacterium rhizogenes. In flasks, the mathematical relationship between hairy root growth and conductivity was established and afterward used to evaluate the biomass evolution in bioreactor cultures due to the difficulty of obtaining direct biomass samples from the bioreactor. The GC-MS analyses of ethanolic extracts from hairy roots revealed the presence of two important compounds: sotolone (1.2% of the volatile fraction) and 3-amino-4,5-dimethyl-2(5H)-furanone (17% of the volatile fraction). These results point out that biotechnological production of sotolone in bioreactors is possible. Additionally, these hairy root cultures offer, for the first time, an excellent biological model to study the biosynthetic pathway of sotolone in fenugreek MH - France MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000172889600053 L2 - sotolone;3-amino-4,5-dimethyl-2(5H)-furanone;hairy roots;airlift bioreactor;Trigonella foenum-graecum;fenugreek;GROWTH; IDENTIFICATION; FENUGREEK; FLAVOR; 3-HYDROXY-4,5-DIMETHYL-2(5H)-FURANONE; BIOSYNTHESIS; ODORANTS; REACTOR; 4-HYDROXYISOLEUCINE; FERMENTATION SO - Journal of Agricultural and Food Chemistry 2001 ;49(12):6012-6019 3911 UI - 13882 AU - Percino MJ AU - Chapela VM AU - Rodriguez-Barbarin C AU - Bernes S AD - Univ Autonoma Puebla, Ctr Quim, Inst Ciencias, Puebla 72570, MexicoUANL, Fac Ciencias Quim, Div Estudios Super, Monterrey 64570, Nuevo Leon, MexicoPercino, MJ, PMB 48,Suite 16,1605-B Pacific Rim CT, San Diego, CA 92154 USA TI - X-ray crystal structure of two different phases (triclinic and orthorhombic) of p-methacryloylaminophenylarsonic acid monomer AB - Monomer of p-methacryloylaminophenylarsonic acid (p-MAPHA) was prepared from the condensation reaction of p-aminophenylarsonic acid and methacryloyl chloride. From free radical polymerization of the monomer it is possible to obtain interesting polyelectrolyte materials with water-soluble behavior. A noteworthy feature of the p-MAPHA monomer molecule was its crystallization. We found that crystallization conditions led to three different molecule structures within two different crystal systems. The triclinic crystal comprises one molecule per asymmetric unit (two per unit cell) and belongs to a Pi space group, and orthorhombic crystal has two molecules of p-MAPHA per asymmetric unit (eight per unit cell) and belongs to a P2(1)cn space group. It is also important to note that the molecular structure has consequences on the properties of the compounds in crystal form, basically in relation to the expected second harmonic generation (SHG) properties. The latter are related to the solid state of both crystals forms of p-MAPHA. The two different crystals are characterized by an extended intermolecular hydrogen bonding system joining symmetry related molecules. Changes in H positions in the hydrogen bonds within the different phases and conformations of p-MAPHA are sufficient to induce a dramatic change in intermolecular networking and symmetry (which increases from triclinic to orthorhombic), in which case the SHG properties change. The structure of the monomer was also established by mass spectrometry, IR, H-1 and C-13 NMR spectroscopy. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000168080900006 L2 - phenylarsonic acid derivatives;water-soluble polymers;nonlinear optics properties;crystal structures;2ND-HARMONIC GENERATION; MOLECULAR-CRYSTALS; OPTICAL-PROPERTIES; UNITS SO - Journal of Molecular Structure 2001 ;562(1-3):45-53 3912 UI - 12799 AU - Pereiro M AU - Man'kovsky S AU - Baldomir D AU - Iglesias M AU - Mlynarski P AU - Valladares M AU - Suarez D AU - Castro M AU - Arias JE AD - Univ Santiago de Compostela, Fac Fis, Dept Fis Aplicada, Santiago De Compostela, SpainNatl Acad Sci Ukraine, Inst Phys Met, UA-03680 Kiev 142, UkraineNatl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Intituto Invest Technol, Santiago De Compostela, SpainPereiro, M, Univ Santiago de Compostela, Fac Fis, Dept Fis Aplicada, Santiago De Compostela, Spain TI - Model potential nonlocal density functional calculations of small cobalt clusters, Co-n,n <= 5 AB - The results of self-consistent nonlocal generalized gradient approximation (GGA) density functional calculations are reported for small cobalt clusters Co-n (2 less than or equal to n less than or equal to 5). An emphasis is made on a proper treatment of exchange and correlation effects. The enhancement of the magnetic moments as well as the bonding properties of these clusters are discussed in terms of the cluster size and symmetry. We compare some results from deMon-KS (D) module release 3.2 and the computational scheme of Sambe-Felton and Dunlap (SFD). (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0256 UR - ISI:000171255400021 L2 - APPROXIMATION; ENERGIES; EXCHANGE; ACCURATE SO - Computational Materials Science 2001 ;22(1-2):118-122 3913 UI - 14361 AU - Pereiro M AU - Baldomir D AU - Iglesias M AU - Rosales C AU - Castro M AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Fac Fis, Dept Fis Aplicada, Santiago De Compostela, SpainCastro, M, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Model potential density functional study of small cobalt clusters, Co-n, n <= 3 AB - Small clusters of cobalt atoms, Co-n (n less than or equal to 3), were studied with the aid of the program deMon-KS module release 3.2, which is a density functional theory based method. Self-consistent-field model core potential (MCP) calculations, which describe the core electrons of the cobalt atom, were done in concert with the generalized gradient approximation (GGA) and local spin density approximation for the treatment of the exchange-correlation (XC) effects, MCP and all-electron (AE) calculations, at the same level of theory for XC, are compared and discussed. The obtained GCA-MCP results show a dramatical improvement in the calculated binding energies (BE), which is due to the accurate description of the XC energy, through CGA, and to a substantial reduction of the basis set superposition errors (BSSE). Finally, the present calculations are compared with other theoretical and experimental results obtained for these systems. (C) 2001 John Wiley & Sons, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000166851400005 L2 - small-cobalt clusters;DFT-MCP calculations;ionization potentials;magnetic properties;GENERALIZED-GRADIENT APPROXIMATION; MOLECULES; ENERGIES; DISSOCIATION; EXCHANGE; ACCURATE; DIMERS; ATOMS; NEON SO - International Journal of Quantum Chemistry 2001 ;81(6):422-430 3914 UI - 12762 AU - Peressutti J AU - Sampayo OA AU - Aranda JI AD - Univ Nacl Mar del Plata, Dept Fis, RA-7600 Mar Del Plata, ArgentinaUniv Michoacana de San Nicolas de Hidalgo, Escuela Ciencias Fisicomatemat, Morelia, Michoacan, MexicoPeressutti, J, Univ Nacl Mar del Plata, Dept Fis, Funes 3350, RA-7600 Mar Del Plata, Argentina TI - Signatures for Majorana neutrinos in e(-)gamma colliders AB - We study the possibilities to detect Majorana neutrinos in e(-) gamma colliders for different center of mass energies. We study the W(-)W(-)l(j)(+)(l(j)(+)=e(+),mu (+),tau (+))final states which are, due to leptonic number violation, a clear signature for an intermediate Majorana neutrino contribution. Such a signal (final leptons have the opposite charge of initial leptons) is not possible if the heavy neutrinos are Dirac particles. In our calculation we use the helicity formalism to obtain analytic expressions for the amplitude and we have considered that the intermediate neutrinos can be either on shell or off shell. Finally we present our results for the total cross section and for the angular distribution of the final lepton. We also include a discussion on the expected events number as a function of the input parameters MH - Argentina MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000171280300015 L2 - HIGH-ENERGIES; MULTIPLE BREMSSTRAHLUNG; GAUGE-THEORIES; COLLISIONS; VIOLATION; FERMIONS; DECAY SO - Physical Review D 2001 ;6407(7): 3915 UI - 12138 AU - Pereyra-Martinez AC AU - Roselli CE AU - Stadelman HL AU - Resko JA AD - Oregon Hlth Sci Univ, Sch Med, Dept Physiol & Pharmacol, Portland, OR 97201, USAPereyra-Martinez, AC, Univ Autonoma Chiapas, Escuela Med, Calle Cent & 10A Sur S-N,Col Ctr, Tuxtla Gutierrez 29000, Chiapas, Mexico TI - Cytochrome P450 aromatase in testis and epididymis of male rhesus monkeys AB - To understand the role of estrogen in testicular and epididymal function of rhesus monkeys, we measured steroids in the spermatic and peripheral venus circulation and aromatase activity and its mRNA in testis and epididymis. Testosterone, estradiol-17 beta, and estrone, but not androstenedione, were elevated in the sperma, tic vein serum compared to the peripheral circulation. Aromatase activity in testis and in caput epididymis (259 +/- 16 [SEM] vs 274 +/- 47 fmol of (H2O)-H-3/mg of protein/h [n = 10], respectively) was significantly, higher (p < 0.01) than in corpus and cauda (124 +/- 28 and 113 +/- 33 fmol of (H2O)-H-3/mg of protein/h [n = 10)], respectively). In the ribonuclease protection assay, two P450(arom) mRNA transcripts were identified in testis and epididymis. One corresponded with the aromatase full-length transcript and the other was a truncated isoform. The latter was significantly more abundant than the former (p < 0.01). Our results demonstrate that the monkey testis and, to a lesser extent, the epididymis can aromatize androgens. However, in the epididymis, like in some areas of the brain, there was a discrepancy between the aromatase activity and the mRNA. The fact that P450(arom) mRNA and aromatase activity do not correlate in the epididymis may indicate that aromatase activity is not strictly regulated at the level of RNA expression and that other mechanisms for this regulation should be considered MH - Mexico|Chiapas MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 12 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0969-711X UR - ISI:000172939400003 L2 - messenger RNA;aromatase;rhesus monkey;testis;epididymis;MESSENGER-RIBONUCLEIC-ACID; ESTROGEN-RECEPTOR GENE; LUTEINIZING-HORMONE; GERM-CELLS; TESTICULAR AROMATASE; TARGETED DISRUPTION; ANDROGEN; SPERMATOGENESIS; TESTOSTERONE; DEFICIENCY SO - Endocrine 2001 ;16(1):15-19 3916 UI - 12515 AU - Perez-Armendariz EM AU - Lamoyi E AU - Mason JI AU - Cisneros-Armas D AU - Luu-The V AU - Moreno JFB AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoUniv Edinburgh, Dept Reprod & Dev Sci, Edinburgh, Midlothian, ScotlandCHU Laval, Res Ctr, Mol Endocrinol Lab, Quebec City, PQ G1V 4G2, CanadaUNAM, Hosp Gen Mexico, Fac Med, Dept Med Expt,Unidad Salud Reprod, Mexico City, DF, MexicoPerez-Armendariz, EM, UNAM, Hosp Gen Mexico, Fac Med, Dept Med Expt,Unidad Salud Reprod, Mexico City, DF, Mexico TI - Developmental regulation of connexin 43 expression in fetal mouse testicular cells AB - Multiple connexins have been identified in testicular cells. Several lines of evidences indicate that, among them, connexin 43 (Cx43) may be unique for control of gonad development and spermatogenesis. To date, however, it is not known whether Cx43 is expressed in the fetal testis and what possible types of cellular interactions mediated by this connexin are critical to male fertility. In the present work, expression of Cx43 was investigated at various developmental ages in cryosections from mouse testis by using specific antibodies against Cx43. In serial or double-labeled sections, Cx43 localization was compared with immunocytochemical distribution of steroidogenic enzyme, 3 beta -hydroxysteroid dehydrogenase (3 beta HSD), Mullerian inhibitory hormone (MIH), and germinal nuclear cell antigen (GCNA1), which are specific markers, respectively, of interstitial Leydig, Sertoli, and germinal cells. Sections were analyzed by fluorescence microcopy. We found that Cx43 immunofluorescence (IF) was uniformly distributed in the undifferentiated gonad at 11.5 days post coitus (dpc) and in cells of the mesonephric tubules. In the undifferentiated gonad, Cx43 was localized between primordial germ cells and somatic cells. At 12.5 dpc, when the gonad has undergone sexual differentiation, in the interstitium Cx43 was localized in Leydig cells and in the seminiferous cord it was localized between adjacent Sertoli cells. In Leydig and Sertoli cells, Cx43 labeling increased at 14.5, 16.5, and 18.5 dpc. From day 12.5 up to 18.5 dpc, Cx43 was also localized in cell borders between germinal and Sertoli cells. In conclusion, this study demonstrates that from the earliest stages of gonadal development, Cx43 is expressed in the principal cell types that participate in the control of male fertility. It also shows that Cx43 expression in Leydig and Sertoli cells increase during fetal life. Finally, it provides evidence that, throughout embryonic life, Cx43 forms gap junctions between Sertoli and germinal cells. Anat Rec 264:237-246, 2001. (C) 2001 Wiley-Liss, Inc MH - Canada MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 16 U4 - Anatomy & Morphology U5 - J;Article AV - English IS - 0003-276X UR - ISI:000171962700002 L2 - gonad;development;Leydig;Sertoli;germinal;differentiation;proliferation;secretion;connexin43;fetal testis;MICE LACKING CONNEXIN43; GAP JUNCTION CHANNELS; PRIMORDIAL GERM-CELLS; MOLECULAR-CLONING; SERTOLI CELLS; INTERCELLULAR COMMUNICATION; SEMINIFEROUS EPITHELIUM; FUNCTIONAL EXPRESSION; PROTEIN; RAT SO - Anatomical Record 2001 ;264(3):237-246 3917 UI - 13623 AU - Perez-Benitez A AU - Rovira C AU - Veciana J AU - Vidal-Gancedo J AD - CSIC, Inst Ciencia Mat Barcelona, Cerdanyola 08193, SpainUniv Autonoma Puebla, Res Ctr, Fac Chem, Puebla 72570, MexicoRovira, C, CSIC, Inst Ciencia Mat Barcelona, Campus Univ Bellaterra, Cerdanyola 08193, Spain TI - An easy and efficient method to grow single crystals of monoanionic C-60 salts on a copper surface AB - The facile and selective preparation of salts of C-60 monoanion as a single crystals has been accomplished by using metallic copper as the reducing agent in the presence of the electrolyte Ph4PBr. The salt (Ph4P)(2)C60Br, harvested from the surface of a copper wire, has been characterized by electron paramagnetic resonance, Vis-NIR spectroscopy and X-ray crystal structure MH - Mexico|Puebla MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter;Polymer Science U5 - J;Article AV - English IS - 0379-6779 UR - ISI:000168831200032 L2 - fullerenes and derivatives;single-crystal growth;crystal and molecular structures;reduction;copper;ELECTROCRYSTALLIZATION; SPECTRA; ESR SO - Synthetic Metals 2001 ;121(1-3):1157-1158 3918 UI - 13896 AU - Perez-Enriquez R AU - Takemura M AU - Tabata K AU - Taniguchi N AD - Tohoku Univ, Grad Sch Agr Sci, Sendai, Miyagi 9818555, JapanCIBNOR, Lab Aquaculture Genet, La Paz 23040, Baja California, MexicoKochi Univ, Fac Agr, Nankoku, Kochi 7838502, JapanTaniguchi, N, Tohoku Univ, Grad Sch Agr Sci, Sendai, Miyagi 9818555, Japan TI - Genetic diversity of red sea bream Pagrus major in western Japan in relation to stock enhancement AB - Stock enhancement is used in Japan as a tool to help the replenishment of wild populations of red sea bream Pagrus major. in this study, we analyzed the genetic diversity and composition of wild red sea bream at seven locations around Shikoku Island, South-west Japan, using three microsatellite loci. This analysis was done to test the hypothesis that: (i) red sea bream comprises a single Mendelian population along Japan; and (ii) stock enhancement programs around Shikoku Island are causing genetic differentiation among wild stocks. The results indicated that some locations from the Shikoku area were not significantly different from the rest of Japan, supporting the hypothesis of a single Mendelian population. Significant departures from Hardy-Weinberg equilibrium and significant pairwise F-ST among locations indicated genetic instability within this region. We suggest that the stock enhancement programs made in the region are the possible cause of this genetic instability. A management scheme for the hatcheries involved in the stock enhancement of red sea bream is presented MH - Japan MH - Mexico|Baja California PB - TOKYO: JAPANESE SOC FISHERIES SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Fisheries U5 - J;Article AV - English IS - 0919-9268 UR - ISI:000168221200011 L2 - genetic diversity;microsatellites;Pagrus major;red sea bream;stock enhancement;MICROSATELLITE DNA; POPULATION-STRUCTURE; PACIFIC SO - Fisheries Science 2001 ;67(1):71-78 3919 UI - 13755 AU - Perez-Farrera MA AU - Croat TB AD - Univ Ciencias & Artes Estado Chiapas, Escuela Biol, Tuxtla Gutierrez 29000, Chipas, MexicoMissouri Bot Gardens, St Louis, MO 63166, USAPerez-Farrera, MA, Univ Ciencias & Artes Estado Chiapas, Escuela Biol, AP 782, Tuxtla Gutierrez 29000, Chipas, Mexico TI - A new species of Anthurium (Araceae) from Chiapas, Mexico AB - Anthurium faustomirandae sp. nov, is described and illustrated from Chiapas, Mexico. It is similar to A, titanium Standley & Steyermark but differs from that species in having persistent intact cataphylls, thicker pruinose leaf blades with an acute rather than acuminate apex, and a shorter, stouter inflorescence with a much broader spathe and more stipitate spadix MH - Mexico|Chiapas MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000168496000017 L2 - Anthurium;Araceae;Mexico SO - Novon 2001 ;11(1):88-91 3920 UI - 11580 AU - Perez-Garcia B AU - Mendoza A AU - Riba R AU - Gomez-Pignataro LD AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Mexico City 09340, DF, MexicoOTS, San Pedro, Costa RicaPerez-Garcia, B, Univ Autonoma Metropolitana Iztapalapa, Dept Biol, AP 55-535, Mexico City 09340, DF, Mexico TI - Development of the sexual phase of Pseudocolysis bradeorum (Polypodiaceae) AB - The development and morphology of the sexual phase of Pseudocolysis bradeorum (Polypodiaceae) are described from material collected in Finca La Selva, near Puerto Viejo, Province of Heredia, Costa Rica. Spores were sown in Thompson medium with agar (25 Petri dishes) and germinated after seven days; the germination pattern was Gleichenia-type and the prothallial development Drynaria-type. Gametangia were typical of homosporous leptosporangiate ferns. Sporophytes appeared after seven months of culture. The sexual phase of this species shares many morphological characteristics with Old and New world species of Polypodiaceae. There is a tendency for vegetative propagation with Pseudocolysis gametophytes MH - Costa Rica MH - Mexico|Distrito Federal PB - WASHINGTON: AMER FERN SOC INC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-8444 UR - ISI:000174559000004 SO - American Fern Journal 2001 ;91(4):214-226 3921 UI - 12788 AU - Perez-Gonzalez J AU - Denn MM AD - CUNY City Coll, Benjamin Levich Inst Phys Chem Hydrodynam, New York, NY 10031, USAInst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Lab Reol, Mexico City 75076, DF, MexicoDenn, MM, CUNY City Coll, Benjamin Levich Inst Phys Chem Hydrodynam, New York, NY 10031 USA TI - Flow enhancement in the continuous extrusion of linear low-density polyethylene AB - Enhanced throughput and the elimination of sharkskin were observed over an extended temperature range when linear low-density polyethylenes having the same molecular weight, polydispersity, and melt index, one with and one without commercial additives, were extruded through alpha -brass dies. The additives appear to play a significant role in the detailed flow behavior, however, most notably in an irreversible transition to a "normal" flow curve at stresses on the order of 0.3 MPa. There are indications of a slip-like phenomenon, including the occurrence of electrostatic charge on the extrudate. A high-throughput, low-extrusion-pressure processing window like that associated by Keller with a transition to a mesophase was observed for the polymer containing no additives, but not for the polymer containing additives MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000171261000018 L2 - PHASE-TRANSITIONS; MELTS; INSTABILITIES; SLIP SO - Industrial & Engineering Chemistry Research 2001 ;40(20):4309-4316 3922 UI - 12409 AU - Perez-Lachaud G AU - Hardy ICW AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Sunderland, Ctr Ecol, Sunderland SR1 3SD, EnglandPerez-Lachaud, G, En Naurous, F-31590 Verfeil, France TI - Alternative hosts for bethylid parasitoids of the coffee berry borer, Hypothenemus hampei (Coleoptera : Scolytidae) AB - Three species of bethylid wasps, Prorops nasuta Waterston, Cephalonomia stephanoderis Betrem, and C. hyalinipennis Ashmead, attack the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), by both predation and parasitism. C. hyalinipennis has only recently been reported to attack H. hampei. Its previously recorded hosts belong to the coleopteran families Curculionidae, Anobiidae, and Scolytidae. We evaluated five further coleopteran species, in the families Curculionidae, Bostrichidae, and Bruchidae, as alternative hosts. High proportions of all five species were both fed upon and oviposited on (normally by concurrent host feeding). Offspring developmental mortality varied greatly (12-95%) on different host species. Offspring production per host was about three times greater than on H. hampei when females were presented with the curculionids Caulophilus oryzae (Gyllenhal) and two species of Sitophilus. C. stephanoderis and P. nasuta are currently the main biological control agents of H. hampei: they have long been thought to be monophagous but C. stephanoderis has recently been reported to attack H. obscurus. We evaluated C. oryzae, as a potential host or prey for P. nasuta, and both C. oryzae and Sitophilus sp. for C. stephanoderis. Host feeding was very common in both parasitoid species. The majority of females also oviposited on C. oryzae (71% P. nasuta, 60% C. stephanoderis) and 20% of C. stephanoderis parasitized Sitophilus sp. Fifty-two percent of C. stephanoderis and 7% of P. nasuta offspring survived to adulthood when developing on C. oryzae. The lifetime fecundities of these parasitoids presented with these host species were, however, low (maximum 17 eggs, mean less than or equal to 8.25) and preoviposition periods were generally long (ca. 19 days). Adult female C. stephanoderis lived longer when presented C. oryzae rather than Sitophilus sp. Host feeding also increased longevity. We discuss these results in the context of mass rearing these bethylids for release as biological control agents. (C) 2001 Academic Press MH - United Kingdom MH - France MH - Mexico|Chiapas PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000172172400008 L2 - coffee berry borer;Hypothenemus hampei;Cephalonomia hyalinipennis;Cephalonomia stephanoderis;Prorops nasuta;factitious hosts;alternative hosts;nutrition enhancement;mass rearing;biological control;STEPHANODERIS BETREM HYMENOPTERA; CEPHALONOMIA-STEPHANODERIS; SEX-RATIO; BIOLOGICAL-CONTROL; FACTITIOUS HOST; CLUTCH SIZE; CHIAPAS; MEXICO; DISPERSAL; ATTACKING SO - Biological Control 2001 ;22(3):265-277 3923 UI - 12864 AU - Perez-Lopez C AU - Santoyo FM AU - Pedrini G AU - Schedin S AU - Tiziani HJ AD - Ctr Invest Opt, Leon 37150, Guanajuato, MexicoUniv Stuttgart, Inst Tech Opt, D-70569 Stuttgart, GermanyPerez-Lopez, C, Ctr Invest Opt, Lomas Bosque 115, Leon 37150, Guanajuato, Mexico TI - Pulsed digital holographic interferometry for dynamic measurement of rotating objects with an optical derotator AB - A method for measuring dynamic deformations of rotating objects with pulsed digital holography is described. An optical derotator is used to compensate for the rotation. A CCD camera is used to record two holograms with a short time separation (20 mus). Results of deformations between the recordings are obtained after subtraction of the phase distribution between the two digital holograms. Fringe phase maps of the phase subtraction of two holograms compensated by the derotator and recorded with a Q-switched double-pulsed ruby laser are presented. A flat disk and the blades of a fan were investigated. We used an optical arrangement that allowed us to improve laser illumination and energy efficiency. Experimental results on quantitative evaluation of dynamical out-of-plane deformations are presented. (C) 2001 Optical Society of America MH - Germany MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000171169800024 L2 - TV-HOLOGRAPHY SO - Applied Optics 2001 ;40(28):5106-5110 3924 UI - 12228 AU - Perez-Lorenzana A AU - Pires CAD AD - Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo, BrazilPerez-Lorenzana, A, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - Small active and sterile neutrino masses from the TeV scale AB - A new mechanism for understanding small neutrino masses using only simple new physics at the TeV scale is proposed. As an application, it is shown how it can naturally lead to the mass hierarchy of the so-called bimaximal mixing in the case of three active neutrinos, or to the 3 + 1 scenario with a sterile neutrino, using only the SU(2)(L) quantum numbers of the particles. (C) 2001 Elsevier Science BN. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000172602500013 L2 - LARGE EXTRA DIMENSIONS; SEESAW MECHANISM; SUPER-KAMIOKANDE; OSCILLATIONS; MODEL; ANOMALIES; MATRICES; TEXTURES; DECAY SO - Physics Letters B 2001 ;522(3-4):297-303 3925 UI - 13908 AU - Perez-Marin L AU - Lopez-Valdivia H AU - vila-Perez P AU - Otazo-Sanchez E AU - edo-Mirand G AU - Gutierrez-Lozano G AU - Chamaro JA AU - De la Torres-Orozco J AU - Carapia-Morales L AD - Inst Nacl Invest Nucl, Dept Estud Ambiente, Mexico City 06100, DF, MexicoUniv Havana, Inst Mat & React, Havana 10400, CubaUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42035, MexicoUniv Autonoma Barcelona, Grp Sensores & Biosensores, E-08193 Barcelona, SpainPerez-Marin, L, Inst Tecnol Toluca, Ave Inst Tecnol S-N Ex Rancho La Virgen, Mexico City 52140, DF, Mexico TI - Response mechanism of a neutral carrier Hg(II) polymeric membrane ion-selective electrode. SEM and EDAX study AB - Scanning electron microscopy (SEM) and energy dispersive atomic X-ray spectrometry (EDAX) were used to study the response mechanism of a previously reported new Hg membrane ion-selective electrode (ISE) based on 1,3-diphenylthiourea. These techniques allowed the study of the membrane surface characteristics, such as the morphological homogeneity and chemical composition. A 'twice Nernstian' response at pH greater than or equal to 7 was explained by the detection of the Hg(OH)(+) cation. A normal Nernstian response was found at acidic pH values. Using these techniques, both coordination compounds, [Ligand-Hg-OH] at pH 7 and [Ligand-Hg-Ligand] at pH 4.5, were confirmed on the electrode membrane surface activated with Hg(NO3)(2) solution at both pH values. These methods provide results which are independent of the potential measurement data and in agreement with them. A successful response model has explained both independent and unbiased sets of results. These conclusions confirm the proposed response mechanisms for this new Hg membrane sensor MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2654 UR - ISI:000168126100019 L2 - LIQUID MEMBRANE; IONOPHORE; CHLORIDE SO - Analyst 2001 ;126(4):501-504 3926 UI - 13834 AU - Perez-Martinez X AU - Antaramian A AU - Vazquez-Acevedo M AU - Funes S AU - Tolkunova E AU - d'Alayer J AU - Claros MG AU - Davidson E AU - King MP AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Mexico City 04510, DF, MexicoThomas Jefferson Univ, Dept Biochem & Mol Pharmacol, Philadelphia, PA 19107, USAInst Pasteur, Lab Microsequencage Proteines, Dept Biotechnol, F-75724 Paris, FranceUniv Malaga, Fac Ciencias, Dept Biol Mol & Bioquim, E-29071 Malaga, SpainGonzalez-Halphen, D, Univ Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Apartado Postal 70-243, Mexico City 04510, DF, Mexico TI - Subunit II of cytochrome c oxidase in chlamydomonad algae is a heterodimer encoded by two independent nuclear genes AB - The mitochondrial genomes of Chlamydomonad algae lack the cox2 gene that encodes the essential subunit COX II of cytochrome c oxidase. COX II is normally a single polypeptide encoded by a single mitochondrial gene. In this work we cloned two nuclear genes encoding COX II from both Chlamydomonas reinhardtii and Polytomella sp. The cox2a gene encodes a protein, COX IIA, corresponding to the N-terminal portion of subunit II of cytochrome c oxidase, and the cox2b gene encodes COX IIB, corresponding to the C-terminal region. The cox2a and cox2b genes are located in the nucleus and are independently transcribed into mRNAs that are translated into separate polypeptides. These two proteins assemble with other cytochrome c oxidase subunits in the inner mitochondrial membrane to form the mature multi-subunit complex. We propose that during the evolution of the Chlorophyte algae, the cox2 gene was divided into two mitochondrial genes that were subsequently transferred to the nucleus. This event was evolutionarily distinct from the transfer of an intact cox2 gene to the nucleus in some members the Leguminosae plant family MH - France MH - Mexico|Distrito Federal MH - Spain MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 39 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000167980900098 L2 - MITOCHONDRIAL-DNA; COMPLETE SEQUENCE; SCENEDESMUS-OBLIQUUS; APOCYTOCHROME-B; BC(1) COMPLEX; BETA-SUBUNIT; GENOME; REINHARDTII; POLYTOMELLA; PROTEINS SO - Journal of Biological Chemistry 2001 ;276(14):11302-11309 3927 UI - 13252 AU - Perez-Moreno J AU - Read DJ AD - Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandEdafol IRENAT, Colegio Postgrad, Montecillo 56230, Edo Mexico, MexicoRead, DJ, Univ Sheffield, Dept Anim & Plant Sci, Western Bank, Sheffield S10 2TN, S Yorkshire, England TI - Exploitation of pollen by mycorrhizal mycelial systems with special reference to nutrient recycling in boreal forests AB - Very large quantities of pollen are released annually by wind-pollinated trees, which dominate northern forest ecosystems. Since pollen is enriched in both nitrogen and phosphorus, this recurrent pulse of deposition constitutes a significant potential source of these elements in what are known to be severely nutrient-limited systems. Here, we demonstrate for the first time? to our knowledge, that an ectomycorrhizal fungus, Paxillus involutus, is able to scavenge effectively for nitrogen and phosphorus in pollen and to return a significant proportion of each nutrient to its autotrophic host, Betula pendula. More than 75 and 96%, respectively, of the nitrogen and phosphorus were removed from pollen in microcosms containing the mycorrhizal fungus, 29 and 25%, respectively being transferred to the plants. In contrast, in microcosms without the mycorrhizal fungus only 42 and 35%, respectively, of nitrogen and phosphorus were lost from the pollen, presumably as a result of export by saprotrophs, and only 12 and 7%. respectively were transferred to the plants. We hypothesize that this process of resource recapture, by contributing significantly to the ability of the trees to sustain the necessary annual investment in pollen production, will have a major impact upon their reproductive capabilities and hence 'fitness' MH - United Kingdom MH - Mexico|Estado De Mexico PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 16 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000169865400002 L2 - nutrient mobilization;vegetative mycelium;ectomycorrhizal fungi;organic substrates;pine forests;pollen;BETULA-PENDULA ROTH; WOOD-WIDE WEB; ECTOMYCORRHIZAL PLANTS; VEGETATIVE MYCELIUM; PINUS-SYLVESTRIS; LITTER; FUNGI; RELEASE SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2001 ;268(1474):1329-1335 3928 UI - 12670 AU - Perez-Perez GI AU - Garza-Gonzalez E AU - Flores-Gutierrez JP AU - Maldonado-Garza HJ AU - Bosques-Padilla FJ AU - Tijerina-Menchaca R AD - NYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USAUANL, Hosp Univ, Monterrey, Mexico TI - Comparison of invasive and serological tests for the diagnostic of Helicobacter pylori MH - Mexico|Nuevo Leon MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000171232500369 SO - Gut 2001 ;49():A104-A104 3929 UI - 12222 AU - Perez-Quintana I AU - Martel A AU - Hernandez L AD - Univ La Habana, Fac Fis, Havana 10400, CubaIPN, CICATA, Unidad Altamira, Altamira 89600, MexicoHernandez, L, Univ La Habana, Fac Fis, Colina Univ, Havana 10400, Cuba TI - Comparative study of metal-semiconductor contact degradation by current pulses on silicon solar cells with two contact types AB - This work accomplishes a comparative study of metal-semiconductor contact degradation on two different types of silicon solar cells contacts. One of them was a thermally vacuum-evaporated Ti/Pd/Ag contact, and the other one was a screen-printed contact. An experimental and theoretical methodology was applied in order to study the degradation due to periodic hot/cool switching and knowledge about all fundamental parameters from I-V characteristics of both types of solar cells was obtained. The periodic hot/cool process was carried out by current pulses and the double exponential model of I-V characteristic was used to acquire all fundamental parameters of the solar cells. We found that all fundamental parameters of both types of cells were degraded with the application of current pulses in the time studied, but in any case, the screen-printed contacts were degraded more smoothly than the thermally vacuum-evaporated front contacts of Ti/Pd/Ag. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Tamaulipas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000172552900008 L2 - I-V solar cells characteristics;metal-semiconductor contact SO - Solid-State Electronics 2001 ;45(12):2017-2021 3930 UI - 13349 AU - Perez-Rodriguez F AU - Leblanc MAR AU - Gandolfini G AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Ottawa, Dept Phys, Ottawa, ON K1N 6N5, CanadaPerez-Rodriguez, F, Univ Autonoma Puebla, Inst Fis, Apdo Post J-48, Puebla 72570, Mexico TI - Flux-line cutting in granular high-T-c and semi-reversible classical type-II superconductors AB - The magnetic responses of granular (NdBa2Cu3O7-x and YBa2Cu3O7-x) and monolithic (PbIn) superconducting plates, cooled in a fixed magnetic field H-z parallel to their plane and, later, subjected to cycles of a transverse magnetic field H-y with an amplitude H-y,H-max > H-z, are investigated both experimentally and theoretically. Magnetization curves, generated as H-y with H-z constant applied and of the order of the full penetration field H-p, are interpreted by employing two competing models (the double critical-state model and the two-velocity hydrodynamic model) for describing flux-line cutting effects on the magnetic behaviour of superconductors. Both models qualitatively and semi-quantitatively reproduce the experimental curves. Unlike the double critical-state model, the two-velocity hydrodynamic approach predicts the appearance of zones with homogeneous magnitude of the magnetic induction B at relatively small values of H-y as \H-y\ is increased. However the effect of these zones is not appreciable since they disappear when \H-y\ reaches a sufficiently large value: \H-y\ greater than or similar to H-z approximate to H-p MH - Canada MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-2048 UR - ISI:000169601200013 L2 - CRITICAL-STATE-MODEL; HIGH-TEMPERATURE SUPERCONDUCTORS; ALTERNATING MAGNETIC-FIELD; HARD SUPERCONDUCTORS; HYSTERESIS LOSSES; TRANSVERSE CURRENTS; POLARIZED NEUTRONS; TRANSPORT CURRENT; JOSEPHSON MEDIUM; ROTATING-DISKS SO - Superconductor Science & Technology 2001 ;14(6):386-397 3931 UI - 13341 AU - Perez-Salicrup DR AU - Claros A AU - Guzman R AU - Licona JC AU - Ledezma F AU - Pinard MA AU - Putz FE AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoProyecto Bolfor, Santa Cruz, BoliviaUniv Aberdeen, Dept Forestry, Aberdeen AB24 5UA, ScotlandUniv Florida, Gainesville, FL 32611, USAPerez-Salicrup, DR, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, AP 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Cost and efficiency of cutting lianas in a lowland liana forest of Bolivia AB - Liana cutting is a commonly suggested silvicultural practice aimed at reducing the negative impacts of lianas on timber production, bur few experimental studies have been conducted to evaluate the cost and efficiency of this practice. In this study, we estimated the cost of cutting lianas in 12 plots of 0.25 ha each in a densely liana-infested forest of lowland Bolivia, and evaluated the efficiency of this silvicultural treatment in terms of the proportion of lianas missed, the density of resprouting liana stumps, and the number of liana-infested trees after two years of an experimental Liana treatment. The cost of cutting lianas in this forest by locally hired laborers was 23.6 (SE = 2.48) person-hours/ha. Considering local cost of labor and the U.S.-Bolivian currency exchange rate at the time of the study, this figure translates to ca $15/ha. Liana density decreased from 2471 (SE = 104.3) to 1.30 (SE = 24.2) liana stems greater than or equal to2 cm/ha immediately after cutting, because 5.5 percent of lianas were left uncut (missed). Slender Lianas were missed more often than lianas with large-diameter stems. Liana species that grow 2-3 m before they start to twine were also frequently missed. Twenty-two percent of liana stumps greater than or equal to2 cm sprouted after cutting. Liana stumps with larger diameters sprouted more than stumps with smaller diameters. Most liana stumps produced only two sprouts. Two years after cutting, 78 percent of trees had no living lianas in their crowns, in contrast to only 13 percent liana-free trees in the control plots. Sixty-four percent of trees still had hanging dead lianas two years after cutting, but only 23 percent of trees were reinvaded hy lianas using dead Liana stems as trellises. Liana cutting can efficiently reduce the number of lianas in liana-infest ed Forests, and the effects of cutting lianas last: for ae least two years; however, the treatment is expensive. Thus, we recommend that it is better to view liana cutting as a preventive activity to avoid liana infestation, rather than as a corrective measure after poor management. Liana cutting can be easily conducted along with other reduced-impact logging practices MH - Bolivia MH - Mexico|Michoacan MH - United Kingdom MH - USA PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 9 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000169772000011 L2 - Bolivia;costs;forest management;liana cutting;tropical forests;MANAGEMENT; TREES SO - Biotropica 2001 ;33(2):324-329 3932 UI - 13574 AU - Perez-Salicrup DR AU - Sork VL AU - Putz FE AD - Univ Missouri, Dept Biol, St Louis, MO 63121, USAUniv Florida, Dept Bot, Gainesville, FL 32611, USAPerez-Salicrup, DR, Univ Nacl Autonoma Mexico, Dept Ecol Recursos Nat, AP 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Lianas and trees in a liana forest of Amazonian Bolivia AB - The distribution of lianas (woody climbing plants) on trees in a lowland "liana forest" of northeastern Bolivia was clumped and varied with characteristics of individual trees and tree neighbors. In twenty-four 900-m(2) square plots established to estimate tree (greater than or equal to 10 cm DBH [diameter at breast height]) and liana (greater than or equal to2 cm DBH) densities and to count the number of lianas a tree carried, we estimated a mean of 65 tree species and 51 liana species per hectare. Mean tree density at the study site (564 trees/ha, SE = 23.7) was similar to other tropical sites, bur mean liana density was much higher (2471 lianas/ha, SE = 104.3). Basal area of trees greater than or equal to 10 cm DBH was low in Oquiriquia (19.2 m(2)/ha) in comparison to other tropical forests. Liana diversity, as expressed by the ratio of liana/tree species, was higher in this forest than in any other so far reported. Of trees greater than or equal to 10 cm DBH, 86 percent carried lianas. Four tree species (Astrocaryum aculeatum, Euterpe precatoria, Xylopia sericea, and Astrocaryum fraxinifolium) had a lower proportion of liana-infested individuals than expected based on the mean percent of liana infestation in this forest. Forest plots with similar tree species composition did not have similar liana composition or liana loads per tree, which suggests chat lianas and trees have no specific associations with each other. Lianas showed an aggregated distribution on trees, suggesting a facilitation process in which new lianas use already established ones to climb trees. Lianas of four different climbing mechanisms climbed a similar number of trees. Plots in the forest with high palm density also had high liana density, suggesting that palms and lianas respond positively to common forest conditions in the study sire (perhaps related to successional forest status). Larger-diameter trees carried more lianas than slender trees, bur this relationship was affected by the density of trees 10-30 cm DBH surrounding each tree, which suggests again that the successional stage of the forest in which a tree grows affects the number of lianas a tree carries. We found little evidence to support the idea that lianas were more likely to climb some tree species than others. Instead, larger trees and trees growing in the vicinity of trees 10-30 cm DBH, tended to have more lianas, perhaps as result of longer exposure to liana infestation MH - Mexico|Michoacan MH - USA PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 25 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000168959800004 L2 - RAIN-FOREST; SPECIES RICHNESS; GROWTH; MANAGEMENT; DIVERSITY; MALAYSIA; DYNAMICS; BASIN; AREA SO - Biotropica 2001 ;33(1):34-47 3933 UI - 13928 AU - Perez-Silva E AU - Herrera T AU - Esqueda M AU - Illana C AU - Moreno G AD - Univ Nacl Autonoma Mexico, Inst Biol, Lab Micol, Mexico City 04510, DF, MexicoCtr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Alcala de Henares, Dept Biol Vegetal, Madrid 28871, SpainPerez-Silva, E, Univ Nacl Autonoma Mexico, Inst Biol, Lab Micol, Apartado Postal 70-233, Mexico City 04510, DF, Mexico TI - Myxomycetes of Sonora, Mexico. I AB - The first study of the Myxomycetes from the Mexican state of Sonora is presented. Seventeen taxa are new records for the Sonoran Mycobiota. Diachea subsessilis, Didymium rubeopus var. rubeopus and Trichia affinis are first records for Mexico. From a chorological point of view two taxa are interesting: Hemitrichia parviverrucospora status and comb. nov, and Metatrichia horrida. SEM photographs of the most important characteristics of these five species are provided MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 5 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000167961400017 L2 - chorology;taxonomy;Mexico;liceales;physarales;stemonitales;trichiales;PENINSULA SO - Mycotaxon 2001 ;77():181-192 3934 UI - 12641 AU - Perez-Tello M AU - Sohn HY AU - St Marie K AU - Jokilaakso A AD - Univ Utah, Dept Chem & Fuels Engn, Salt Lake City, UT 84112, USAHelsinki Univ Technol, Dept Mat Sci & Rock Engn, FIN-02150 Espoo, FinlandPerez-Tello, M, Univ Sonora, Dept Chem Engn & Met, Sonora 83000, Mexico TI - Experimental investigation and three-dimensional computational fluid-dynamics modeling of the flash-converting furnace shaft: Part I. Experimental observation of copper converting reactions in terms of converting rate, converting quality, changes in particle size, morphology, and mineralogy AB - An experimental investigation was conducted to elucidate the main features of the processes taking place in the shaft of a continuous flash-converting furnace for solid copper mattes. The experiments were conducted in a large laboratory furnace. The test variables included the matte grade, oxygen content in the process gas, particle size of the feed material, and oxygen-to-matte ratio. The observed variables included the fractional completion of the oxidation reactions, fraction of sulfur remaining in the particles, copper-to-iron atomic ratio, particle-size distribution, morphology, and mineralogy of the reacted particles. The experiments showed substantial differences in the oxidation behavior of high-grade (72 pct Cu) and low-grade (58 pct Cu) matte particles. Low-grade matte particles reacted evenly throughout the furnace, increased in size, and experienced no substantial fragmentation during oxidation. High-grade matte particles tended to be oxidized unevenly and experienced severe fragmentation leading to generation of dust. The order of the effects of the test variables on the observed variables was found to be (1) the oxygen-to-matte ratio, (2) the particle size of the feed material, and (3) the oxygen content in the process gas. Microscopic examination revealed that the oxides of copper and iron were the main oxidation products, with little elemental copper present in the reacted particles. Potential implications of the experimental findings on the operation of an industrial flash-converting furnace are discussed MH - Finland MH - Mexico|Sonora MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000171471000011 L2 - MATTE PARTICLES; OXIDATION SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2001 ;32(5):847-868 3935 UI - 12642 AU - Perez-Tello M AU - Sohn HY AU - Smith PJ AD - Univ Sonora, Dept Chem Engn & Met, Sonora 83000, MexicoUniv Utah, Dept Chem & Fuels Engn, Salt Lake City, UT 84112, USAPerez-Tello, M, Univ Sonora, Dept Chem Engn & Met, Sonora 83000, Mexico TI - Experimental investigation and three-dimensional computational fluid-dynamics modeling of the flash-converting furnace shaft: Part II. Formulation of three-dimensional computational fluid-dynamics model incorporating the particle-cloud description AB - A fluid-dynamics computer model of the flash-converting furnace shaft, which is based on basic principles, is presented. The model is fully three-dimensional and incorporates the transport of momentum, heat, and mass and the reaction kinetics between the gas and particles in a particle-laden turbulent gas jet. The k-epsilon model was used to describe gas-phase turbulence in an Eulerian framework. The particle-cloud model was used to track the particle phase in a Lagrangian framework. The coupling of gas and particle equations was performed through the source terms in the Eulerian gas-phase governing equations. Copper matte particles were represented as Cu2S . yFeS(x). Based on experimental observation, the oxidation products were assumed to be Cu2O, CuO, Fe3O4, and SO2. A reaction mechanism involving the external mass transfer of oxygen from the gas to the particle surface and diffusion of the oxygen through the successive layers of Cu2O-Fe3O4 and CuO-Fe3O4 was proposed. The predictions of the computer model were compared with the experimental data collected in a large laboratory furnace. Reasonable agreement between the model predictions and the measurements was obtained in terms of the fractional completion of the oxidation reactions and the sulfur remaining in the reacted particles. The relevance of the computational model for further analysis and optimization of an industrial flash-converting operation is discussed MH - Mexico|Sonora MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000171471000012 L2 - SMELTING PROCESS; DISPERSION; COMBUSTION; HEAT SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2001 ;32(5):869-886 3936 UI - 13660 AU - Perez J AU - Amorin H AU - Portelles J AU - Guerrero F AU - M'Peko JC AU - Siqueiros JM AD - Univ La Habana, Fac Fis, Inst Mat & React, C Habana 10400, CubaUniv Oriente, Fac Ciencias Nat & Matemat, Santiago De Cuba 90500, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoPerez, J, Univ La Habana, Fac Fis, Inst Mat & React, C Habana 10400, Cuba TI - Electrical properties of the titanium modified SBN ceramic system AB - The electrical properties of the Sr0.3Ba0.7Nb2O6 system modified with different concentrations of titanium, following the general formula Sr0.3Ba0.7Nb2-yTiyO6-y/2 for charge compensation, are studied. The investigation is carried out in samples prepared by the conventional ceramic method. The X-ray diffraction analysis shows tetragonal tungsten bronze monophasic compounds in all cases. Dielectric measurements show a typical ferroelectric behavior with diffuse phase transition, where the transition temperature and the maximum permittivity decrease with increasing titanium content. The remanent polarization is obtained from hysteresis measurements in the ferroelectric region, while at high temperatures, two processes (a conductive and a ferroelectric process) are overlapping. The diffuse character of the ferroelectric-paraelectric phase transition is also studied and the diffusivity coefficient calculated in all cases MH - Cuba MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1385-3449 UR - ISI:000168729900008 L2 - ferroelectric ceramics;diffuse phase transition;doped SBN;POLARIZATION SO - Journal of Electroceramics 2001 ;6(2):153-157 3937 UI - 13577 AU - Perez JLJ AU - Sakanaka PH AU - Algatti MA AU - Mendoza-Alvarez JG AU - Orea AC AD - IPN, CICATA, Mexico City, DF, MexicoUniv Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, BrazilUNESP, Guaratingueta, SP, BrazilIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoPerez, JLJ, IPN, CICATA, Legaria 694, Mexico City, DF, Mexico TI - An improved three-dimensional model for growth of oxide films induced by laser heating AB - In this paper we consider a three-dimensional hear diffusion model to explain the growth of oxide films which takes place when a laser beam is shined on and heats a metallic layer deposited on a glass substrate in a normal atmospheric environment. In particular, we apply this model to the experimental results obtained for the dependence of the oxide layer thickness on the laser density power for growth of TiO2 films grown on Ti-covered glass slides. We show that there is a very good agreement between the experimental results and the theoretical predictions from our proposed three-dimensional model. improving the results obtained with the one-dimensional heat diffusion model previously reported. Our theoretical results also show the occurrence of surface cooling between consecutive laser pulses, and that the oxide track surface profile closely follows the spatial laser profile indicating that heat diffusive effects can be neglected in the growth of oxide films by laser heating, (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000169032100115 L2 - laser induced oxidation;thin oxide films;laser materials processing SO - Applied Surface Science 2001 ;175():703-708 3938 UI - 13578 AU - Perez JLJ AU - Sakanaka PH AU - Algatti MA AU - Mendoza-Alvarez JG AU - Orea AC AD - IPN, CICATA, Mexico City 11500, DF, MexicoUniv Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, BrazilUNESP, Guaratingueta, SP, BrazilIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoPerez, JLJ, IPN, CICATA, Legaria 694, Mexico City 11500, DF, Mexico TI - One-dimensional analytical model for oxide thin film growth on Ti metal layers during laser heating in air AB - This paper presents the theoretical and experimental results for oxide thin film growth on titanium films previously deposited over glass substrate. Ti films of thickness 0.1 mum were heated by Nd:YAG laser pulses in air. The oxide tracks were created by moving the samples with a constant speed of 2 mm/s, under the laser action. The micro-topographic analysis of the tracks was performed by a microprofiler. The results taken along a straight line perpendicular to the track axis revealed a Gaussian profile that closely matches the laser's spatial mode profile, indicating the effectiveness of the surface temperature gradient on the him's growth process. The sample's micro-Raman spectra showed two strong bands at 447 and 612 cm associated with the TiO2 structure. This is a strong indication that thermo-oxidation reactions took place at the Ti film surface that reached an estimated temperature of 1160 K just due to the action of the first pulse. The results obtained from the numerical integration of the analytical equation which describes the oxidation rate (Wagner equation) are in agreement with the experimental data for film thickness in the high laser intensity region, This shows the partial accuracy of the one-dimensional model adopted for describing the film growth rate. (C) 2001 Elsevier Science B.V, All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000169032100116 L2 - laser-induced oxidation;thin oxide films;laser materials processing SO - Applied Surface Science 2001 ;175():709-714 3939 UI - 13554 AU - Perez RPY AU - Sharples M AD - Univ Nacl Autonoma Mexico, Ctr Instrumentos, Lab Cognic Cibernet & Aprendizaje Ciencia, Mexico City 04510, DF, MexicoUniv Birmingham, Sch Elect & Elect Engn, Educ Technol Res Grp, Birmingham B15 2TT, W Midlands, England TI - MEXICA: A computer model of a cognitive account of creative writing AB - MEXICA is a computer model that produces frameworks for short stories based on the engagement-reflection cognitive account of writing. During engagement MEXICA generates material guided by content and rhetorical constraints, avoiding the use of explicit goals or story-structure information. During reflection the system breaks impasses, evaluates the novelty and interestingness of the story in progress and verifies that coherence requirements are satisfied. In this way, MEXICA complements and extends those models of computerised story-telling based on traditional problem-solving techniques where explicit goals drive the generation of stories. This paper describes the engagement-reflection account of writing, the general characteristics of MEXICA and reports an evaluation of the program MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0952-813X UR - ISI:000169084800005 L2 - engagement;reflection;creativity;computerised storyteller SO - Journal of Experimental & Theoretical Artificial Intelligence 2001 ;13(2):119-139 3940 UI - 13713 AU - Perez T AU - Trumbore SE AU - Tyler SC AU - Matson PA AU - Ortiz-Monasterio I AU - Rahn T AU - Griffith DWT AD - Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697, USAStanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305, USACtr Int Mejoramiento Maiz & Trigo, Mexico City 06600, DF, MexicoCALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USAUniv Wollongong, Dept Chem, Wollongong, NSW 2522, AustraliaPerez, T, Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697, USA TI - Identifying the agricultural imprint on the global N2O budget using stable isotopes AB - Agricultural soils are the most important anthropogenic source of nitrous oxide to the atmosphere. We observed large shifts with time in the emission rate (from 170 to 16 ng N cm(-2) h(-1)) and in delta N-15 of N2O emitted (from -46 parts per thousand to +5 parts per thousand relative to atmospheric N-2) from a urea-fertilized and irrigated agricultural field in Mexico. We calculated overall instantaneous enrichment factors for the sampling period, which suggest that the microbial N2O production shifts from nitrification (week 1)to denitrification (week 2). Isotopic signatures of N2O emissions were not always in accord with other proxies (such as NO/N2O emission ratio or water-filled pore space) used to estimate the relative importance of nitrification and denitrification as N2O sources. These observations strongly suggest that the soil surface emissions integrate processes occurring at different depths in the soil and a decoupling of NO and N2O production in this system. Further clues as to the source of N2O come from the positional dependence of N-15 in the emitted N2O, reported here for the first time in soil emissions. Enrichment at the central N position increased relative to the terminal N position by 9.3 parts per thousand during the first 4 days after irrigation, implying that nitrification preferentially enriches the central N position compared to denitrification. The overall delta N-15 signature we measured for N2O emitted from N-fertilized agricultural systems is more depleted than observed delta N-15 values for N2O emitted from more N-limited forest soils. Assuming that one half of the total agricultural N2O emissions associated with the global increase in soil nitrogen fertilizer use have an isotopic composition comparable to those of the agricultural fields reported here, we predict a decline in the isotopic signature of tropospheric N2O during this century of as much as 3 parts per thousand for N-15. Although many uncertainties remain, we suggest that measurements of delta N-15-N2O in fun air will provide constraints on how the N2O budget has changed during the past century MH - Australia MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 39 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000168731900017 L2 - ATMOSPHERIC NITROUS-OXIDE; GENETIC PROGRESS; TROPICAL FOREST; NORTH PACIFIC; ARABIAN SEA; EMISSIONS; NITRIFICATION; RATIOS; WATER; O-18 SO - Journal of Geophysical Research-Atmospheres 2001 ;106(D9):9869-9878 3941 UI - 12972 AU - Perusquia M AD - Natl Autonomous Univ Mexico, Biomed Res Inst, Mexico City 04510, DF, MexicoOregon Reg Primate Res Ctr, Div Reprod Sci, Beaverton, OR 97006, USAPerusquia, M, Apartado Postal 70-492, Mexico City 04511, DF, Mexico TI - Nongenomic action of steroids in myometrial contractility AB - Steroid hormones are involved in several fundamental aspects of all living beings, with a few slight chemical differences among steroids being enough to give them the extraordinarily diverse biologic specificities that are important in animal physiology and medical therapeutics. Indeed, in the uterus, they have a remarkable action on uterine contractility with physiologic significance in the important reproductive processes of mammalian pregnancy and parturition. The regulation of progesterone on the myometrial contractile activity and related wider subjects of the endocrinology of pregnancy and parturition have been reviewed many times during the twentieth century. However, new data indicate that several progesterone metabolites and some synthetic steroids induce a progesterone-like uterine-relaxing effect. Experimental evidence from our laboratory has shown that 5-reduced progestins and androgens are more potent than progesterone itself in decreasing uterine contractility. The purpose of this review is to update current knowledge of endogenous and exogenous steroids on the phenomenon of uterine contractility, by summarizing their structural differences to induce changes on this process and discussing the possible mechanism of steroids to regulate uterine muscle activity MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 13 U4 - Endocrinology & Metabolism U5 - J;Review AV - English IS - 0969-711X UR - ISI:000170720700010 L2 - steroids;nongenomic effects;progesterone metabolites;5-reduced metabolites;myometrium;uterine relaxation;UTERINE BLOOD-FLOW; SMOOTH-MUSCLE; RAT UTERUS; SEX STEROIDS; IN-VITRO; PROGESTERONE METABOLITES; 4-HYDROXYLATED ESTRADIOL; CORONARY-ARTERIES; INHIBITORY-ACTION; OVARIAN-STEROIDS SO - Endocrine 2001 ;15(1):63-72 3942 UI - 12918 AU - Pestryakov AN AU - Lunin VV AU - Bogdanchikova NE AU - Petranovskii VP AD - Tomsk State Univ Civil Engn, Dept Chem, Tomsk 634003, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow, RussiaNatl Autonomous Univ Mexico, Ctr Ciencia Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Study of surface electronic states of metal catalysts for alcohol partial oxidation MH - Mexico|Baja California MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000170690001655 SO - Abstracts of Papers of the American Chemical Society 2001 ;222():U322-U322 3943 UI - 14596 AU - Peter M AU - Varga Z AU - Hajdu P AU - Gaspar R AU - Damjanovich S AU - Horjales E AU - Possani LD AU - Panyi G AD - Debrecen Univ Med, Sch Med, Dept Biophys & Cell Biol, H-4012 Debrecen, HungaryNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoGaspar, R, Debrecen Univ Med, Sch Med, Dept Biophys & Cell Biol, POB 39, H-4012 Debrecen, Hungary TI - Effects of toxins Pi2 and Pi3 on human T lymphocyte Kv1.3 channels: The role of Glu7 and Lys24 AB - Pandinus imperator scorpion toxins Pi2 and Pi3 differ only by a single amino acid residue (neutral Pro7 in Pi2 vs. acidic Glu7 in Pi3). The binding kinetics of these toxins to human Kv1.3 showed that the decreased on rate (k(ON) = 2.18 x 10(8) M(-1)sec(-1) for Pi2 and 1.28 x 10(7) M(-1)sec(-1) for Pi3) was almost entirely responsible for the increased dissociation constant (K-d) of Pi3 (K-d = 795 pM) as compared to Pi2 (K-d = 44 pM). The ionic strength dependence of the association rates was exactly the same for the two toxins indicating that through-space electrostatic interactions can not account for the different on rates. Results were further analyzed on the basis of the three-dimensional structural models of the toxins. A 3D structure of Pi3 was generated from the NMR spectroscopy coordinates of Pi2 by computer modeling. The Pi3 model resulted in a salt bridge between Glu7 and Lys24 in Pi3. Based on this finding our interpretation of the reduced on rate of Pi3 is that the intramolecular salt bridge reduces the local positive electrostatic potential around Lys24 resulting in decreased short-range electrostatic interactions during the binding step. To support our finding, we constructed a 3D model of the Ser-10-Asp Charybdotoxin mutant displaying distinctly reduced affinity for Shaker channels. The mutant Charybdotoxin structure also displayed a salt bridge between residues Asp10 and Lys27 equivalent to the one between Glu7 and Lys24 in Pi3 MH - Hungary MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology;Cell Biology;Physiology U5 - J;Article AV - English IS - 0022-2631 UR - ISI:000166152800002 L2 - human lymphocyte;Kv1.3;scorpion toxin binding;Pandinus imperator;charybdotoxin;three-dimensional structure;salt bridge;GATED POTASSIUM CHANNELS; SCORPION PANDINUS IMPERATOR; C-TYPE INACTIVATION; K+-CHANNEL; BLOCKING TOXIN; PEPTIDE INHIBITOR; CHARYBDOTOXIN; VENOM; MECHANISM; ACTIVATION SO - Journal of Membrane Biology 2001 ;179(1):13-25 3944 UI - 12511 AU - Peterson AT AU - Sanchez-Cordero V AU - Soberon J AU - Bartley J AU - Buddemeier RW AU - Navarro-Siguenza AG AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Kansas, Kansas Geol Survey, Lawrence, KS 66047, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USA TI - Effects of global climate change on geographic distributions of Mexican Cracidae AB - Although climate change and its implications are a frequent subject of detailed study, the effects of these changes on species' geographic distributions remain little explored. We present a first cross-species analysis of the effects of global climate change on the distributions of one bird family, the Cracidae, in Mexico, based on projecting models of ecological niches from present conditions to modeled future conditions taken from general circulation models of climate change. Based on two different scenarios of climate change and on three assumptions regarding species' dispersal abilities, effects on species' distributions range from drastic reduction to modest increases. These results illustrate the complex nature of species' geographic responses to environmental change, and emphasize the need for detailed analysis of individual species' ecological requirements. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 58 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000171862900003 L2 - global climate change;biodiversity;modeling;ecological niches;SPECIES RANGE; PREDICTION; CONSEQUENCES; BIODIVERSITY; NICHES; MODEL SO - Ecological Modelling 2001 ;144(1):21-30 3945 UI - 14374 AU - Petitpretz P AU - Arvis P AU - Marel M AU - Moita J AU - Urueta J AD - Hop Andre Mignot, Serv Pneumol, F-78157 Le Chesnay, FranceBayer, Puteaux Paris, FranceCtr Hosp Coimbra, Serv Pneumol, Coimbra, PortugalCharles Univ, Fac Hosp Motol, Dept Pneumol, Prague, Czech RepublicInst Nacl Enfermedades Resp, Serv Urgencias, Mexico City, DF, MexicoPetitpretz, P, Hop Andre Mignot, Serv Pneumol, 177 Route Versailles, F-78157 Le Chesnay, France TI - Oral moxifloxacin vs high-dosage amoxicillin in the treatment of mild-to-moderate, community-acquired, suspected pneumococcal pneumonia in adults AB - Study objectives: Comparison of the efficacy and safety of moxifloxacin vs amoxicillin for treatment of mild-to-moderate, suspected pneumococcal community-acquired pneumonia (CAP) in adult patients. Design: Multinational, multicenter, double-blind, randomized study. Setting: Eighty-two centers in 20 countries (Argentina, Brazil, Chile, Croatia, Czech Republic, Estonia, France, Hong Kong, Hungary, Lithuania, Mexico, Portugal, Russia, Slovenia, South Africa, Spain, Turkey, Ukraine, United Kingdom, and Uruguay). Patients: Four hundred eleven adults (inpatients or outpatients) with suspected pneumococcal CAP. Interventions: Randomization 1:1 to moxifloxacin, 400 mg/d, or amoxicillin, 1,000 g tid, for 10 days. Results: Primary efficacy parameter was clinical response, 3 to 5 days after therapy (end of therapy [EOT]) in the per protocol (PP) population (362 patients). The clinical success rate in the PP population was 91.5% (moxifloxacin) and 89.7% (amoxicillin; two-sided 95% confidence interval, -4.2 to 7.8%). The clinical cure rate in patients with proven pneumococcal pneumonia was similar in both treatment groups (87.8%). The bacteriologic success rate in 136 bacteriologically evaluable patients at the EOT was 89.7% (moxifloxacin) and 82.4% (amoxicillin). The bacteriologic success rate against Streptococcus pneumoniae was 89.6% (moxifloxacin) and 84.8% (amoxicillin). The frequency of adverse events was comparable in both treatment groups. Digestive symptoms were the most common drug-related adverse events in both treatment groups. Conclusions: Moxifloxacin was statistically at least as effective as high-dose amoxicillin for treatment of mild-to-moderate, suspected pneumococcal CAP. Moxifloxacin may be an alternative for empiric CAP treatment, especially in areas where multidrug resistance in S pneumoniae is sufficiently prevalent to preclude routine penicillin MH - Czech Republic MH - France MH - Mexico|Distrito Federal MH - Portugal PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 56 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000166766300033 L2 - amoxicillin;community-acquired pneumonia;moxifloxacin;oral therapy;Streptococcus pneumoniae;IN-VITRO ACTIVITY; STREPTOCOCCUS-PNEUMONIAE; ANTIMICROBIAL RESISTANCE; SPARFLOXACIN; SAFETY; BAY-12-8039; EFFICACY; 8-METHOXYQUINOLONE; FLUOROQUINOLONE; TROVAFLOXACIN SO - Chest 2001 ;119(1):185-195 3946 UI - 11948 AU - Pfeiler E AD - Arizona State Univ, Dept Biol, Tempe, AZ 85287, USACtr Invest Alimentac & Desarrollo, Unidad Guaymas, Guaymas 85480, Sonora, MexicoPfeiler, E, Arizona State Univ, Dept Biol, Tempe, AZ 85287, USA TI - Changes in hypoxia tolerance during metamorphosis of bonefish leptocephali AB - Survival times of metamorphosing leptocephali of the bonefish Albula sp. placed in hypoxic sea water (0.68 mg O-2 1(-1)) decreased by about three-fold (from c, 15 to 5 min) over the 10 day metamorphic period. Increased sensitivity to hypoxia coincided with increased larval oxygen demand during metamorphosis. Plots of hypoxic survival time against standard length or w,et mass suggested that metamorphosis (phase II of larval development) could be divided into subphases (IIa and IIb). (C) 2001 The Fisheries Society of the British Isles MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-1112 UR - ISI:000173470100022 L2 - bonefish;Albuliformes;hypoxia tolerance;leptocephali;metamorphosis;ALBULA SP LEPTOCEPHALI; WATER SO - Journal of Fish Biology 2001 ;59(6):1677-1681 3947 UI - 11968 AU - Pfluger LA AU - D'Ovidio R AU - Margiotta B AU - Pena R AU - Mujeeb-Kazi A AU - Lafiandra D AD - Univ Tuscia, Dipartimento Agrobiol & Agrochim, I-01100 Viterbo, ItalyINTA Castelar, Inst Recursos Biol, CIRN, RA-1712 Castelar, ArgentinaCNR, Ist Germoplasma, I-70126 Bari, ItalyCIMMYT, Mexico City 06600, DF, MexicoLafiandra, D, Univ Tuscia, Dipartimento Agrobiol & Agrochim, Via S Camillo De Lellis, I-01100 Viterbo, Italy TI - Characterisation of high- and low-molecular weight glutenin subunits associated to the D genome of Aegilops tauschii in a collection of synthetic hexaploid wheats AB - Synthetic hexaploid wheats (2n=6x=42, AABBDD) involving genomes from Triticum turgidum (2n=4x=28, AABB) and Aegilops tauschii (2n=2x=14, DD) have been produced as a means for introducing desirable characteristics into bread wheat. In the present work we describe the genetic variability present at the Glu-D(t)1 and Glu-D(t)3 loci, encoding high- (HMW) and low-molecular-weight (LMW) glutenin subunits respectively, derived from Ae. tauschii, using electrophoretic and chromatographic methods, in a collection of synthetic hexaploid wheats. A wide variation both in mobility and surface hydrophobicity of HMW glutenin subunits was observed between different accessions of Ae. tauschii used in the production of the synthetic hexaploids. A combination of electrophoretic and chromatographic methods improves the identification of HMW glutenin subunits; in fact subunits with identical apparent mobility were revealed to have a different surface hydrophobicity by reversed-phase high performance liquid chromatography. None of the Dx5(t) subunits present in Ae. tauschii showed the presence of the extra cysteine residue found in the HMW glutenin subunit Dx5 of Triticum aestivum, as revealed by selective amplification with polymerase chain reaction (PCR). The wide variability and the high number of subunits encoded by the Glu-Dt3 locus suggests that Ae. tauschii may be a rich source for enhancing the genetic variability of glutenin subunits in bread wheat and improving bread-making properties MH - Argentina MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000173261300021 L2 - Aegilops tauschii;synthetic hexaploids;HMW-GS;LMW-GS;electrophoresis;BREAD-MAKING QUALITY; POLYACRYLAMIDE-GEL-ELECTROPHORESIS; TRITICUM-TAUSCHII; STORAGE PROTEINS; DOUGH PROPERTIES; COMMON WHEATS; HESSIAN FLY; T-TAUSCHII; LEAF RUST; SQUARROSA SO - Theoretical and Applied Genetics 2001 ;103(8):1293-1301 3948 UI - 13272 AU - Phillippy BQ AU - Wyatt CJ AD - USDA, So Reg Res Ctr, New Orleans, LA 70124, USACtr Invest Alimentac & Desarrollo, Hermosillo, Sonora, MexicoPhillippy, BQ, USDA, So Reg Res Ctr, 1100 Robert E Blvd, New Orleans, LA 70124 USA TI - Degradation of phytate in foods by phytases in fruit and vegetable extracts AB - The ability of phytases from fresh fruits and vegetables to degrade phytate in foods was determined in vitro. In contrast to the more consistent presence of phytase in vegetables, only a few fruits contained detectable phytase activity. The highest phytase activities were 121 and 97 nmol min(-1) g(-1) in scallion leaves and avocado fruit, respectively. Avocado fruit also contained 0.14% phytate on a wet-weight basis. Crude phytase extracts were incubated with ground corn tortillas or refried beans at 37 degreesC. Most of the phytate was degraded within 30 min by a 4-fold excess by dry weight of scallion leaves. Avocado extracts incubated alone metabolized most of their endogenous phytate within 2 h MH - USA MH - Mexico|Sonora PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 7 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000169842400005 L2 - phytase;phytate;inositol hexakisphosphate;bioavailability;minerals;PHYTIC ACID; INOSITOL PHOSPHATES; IN-VITRO; ION CHROMATOGRAPHY; IRON-ABSORPTION; CALCIUM; WHEAT; REDUCTION; BEANS; PURIFICATION SO - Journal of Food Science 2001 ;66(4):535-539 3949 UI - 13758 AU - Phillips JP AU - Cuesta L AU - Ortega V AD - Inst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoInst Astrofis Canarias, Tenerife, SpainPhillips, JP, Inst Astron & Meteorol, Ave Vallarta 2602,Col Arcos Vallarta, Guadalajara 44130, Jalisco, Mexico TI - The low-excitation structures of planetary nebulae AB - The low excitation properties of the planetary nebula (PN) NGC 6720 are known to be unusual, and to imply large ring/core emission ratios. We point out that such characteristics are by no means confined to this source alone, and that high ratios may occur in a large fraction of elliptical and circular PNe. Such trends may arise because of the presence of thin low-excitation emission sheets 'wrapped' within and around the primary outflows. The widths of such shells are required to be exceedingly small, and may (for certain cases) be of order <<10(-2) pc. Such a mechanism appears capable of explaining most of the observed emission properties, and may arise through shock interaction between differing envelopes. Alternative explanations in terms of bipolar or cylindrical outflows are shown to be implausible MH - Mexico|Jalisco MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000168544200018 L2 - planetary nebulae : general;ISM : structure;RING NEBULA; IONIZATION STRUCTURE; CENTRAL STAR; NGC 6720; SPECTRUM; EVOLUTION; RADIATION; NGC-6720; NGC-6572; NGC-7009 SO - Monthly Notices of the Royal Astronomical Society 2001 ;322(4):866-876 3950 UI - 13255 AU - Picos-Vega A AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Contribution of edge recoiling of diffusion to anomalous transient photo-currents in amorphous materials AB - We demonstrate that the edge recoiling of diffusion may cause anomaly in transient photo-currents measured by the time-of-flight technique for homogeneous amorphous materials. The universality of the anomalous transports is successfully revealed in this new macroscopic explanation. The anomaly in the transient currents is directly related to the degree of the diffusion and the drift. In the previously established continuous-time-random-walk theory, similar anomalous transports were attributed to some unusual microscopic process of retarded trapping-releasing and hopping. We show that the same effects may present in homogeneous materials with normal diffusion process. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000169948300024 L2 - TRANSPORT; SOLIDS SO - Physics Letters A 2001 ;285(5-6):395-400 3951 UI - 12121 AU - Pietrogrande MC AU - Coll P AU - Sternberg R AU - Szopa C AU - Navarro-Gonzalez R AU - Vidal-Madjar C AU - Dondi F AD - Univ Ferrara, Dipartmento Chim, I-44100 Ferrara, ItalyCNRS, LISA, UMR 7583, Creteil, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, LQPEP, Mexico City 04510, DF, MexicoCNRS, Lab Rech Polymeres, F-94320 Thiais, FrancePietrogrande, MC, Univ Ferrara, Dipartmento Chim, Via L Borsari 46, I-44100 Ferrara, Italy TI - Analysis of complex mixtures recovered from space missions - Statistical approach to the study of Titan atmosphere analogues (tholins) AB - To study Titan, the largest moon of Saturn, laboratory simulation experiments have been performed to obtain analogues of Titan's aerosols (named tholins) using different energy sources. Tholins, which have been demonstrated to represent aerosols in Titan's haze layers, are a complex mixture, resulting from the chemical evolution of several hydrocarbons and nitriles. Their chromatographic analysis yields complex chromatograms, which require the use of mathematical procedures to extract from them all the information they contain. Two different chemometric approaches (the Fourier analysis approach and the statistical model of peak overlapping) have been successfully applied to pyrolysis-GC-MS chromatogram of a tholin sample. Fundamental information on the mixture's chemical composition (number of components, in) and on the separation system performance (separation efficiency, sigma) can be easily estimated: the excellent correspondence between the data calculated by the two independent procedures proves the reliability of the statistical approaches in characterizing a tholin chromatogram. Moreover, the plot of autocorrelation function contains, in a simplified form, all the information on the retention pattern: retention recursivities can be easily singled out and related to specific molecular structure variations. Therefore, the autocorrelation function (ACF) plot constitutes a simplified fingerprint of the pyrolysis products of tholins, which can be used as a powerful tool to characterize a tholin sample. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000172945000007 L2 - Titan's atmosphere;aerosols;statistical analysis;autocorrelation function;autocovariance function;tholins;volatile organic compounds;MULTICOMPONENT CHROMATOGRAMS; FOURIER-ANALYSIS; GAS-CHROMATOGRAPHY; QUANTITATIVE THEORY; SEPARATION; CAPILLARY; COLUMNS; MODELS SO - Journal of Chromatography A 2001 ;939(1-2):69-77 3952 UI - 13340 AU - Pimienta-Barrios E AU - Robles-Murguia C AU - Nobel PS AD - Univ Guadalajara, CUCBA, Dept Ecol, Zapopan, Jalisco, MexicoUniv Calif Los Angeles, Dept Biol, OBEE, Los Angeles, CA 90095, USAPimienta-Barrios, E, Univ Guadalajara, CUCBA, Dept Ecol, Zapopan, Jalisco, Mexico TI - Net CO2 uptake for Agave tequilana in a warm and a temperate environment AB - The main objective was to evaluate the effects of seasonal variations in air temperature, soil water content, and irradiation on the net rate of CO2 uptake for Agave tequilana growing in a warm subtropical environment (Amatitan, Jalisco, Mexico) and in a temperate subtropical environment (Arandas, Jalisco, Mexico). At Amatitan, the lowest value of positive daily net CO2 uptake (141 mmol/m(2)/d) occurred at the end of the summer rainy season and the highest values during the winter (578 and 921 mmol/m(2)/d); at Arandas, the lowest value (188 mmol/m(2)/d) occurred at midsummer and the highest values at the end of the summer (763 mmol/m(2)/d) and in late winter (572 mmol/m(2)/ d). The highest values of daily net CO2 uptake in both localities reflected prolonged daily periods of net CO2 uptake thar included both daytime and nighttime assimilation accompanied by high rates of nocturnal net CO2 uptake doe to moderate nighttime air temperatures. High temperatures in the summer reduced daily net CO2 uptake at both localities bur in late summer, the nighttime temperatures ac Arandas were moderate, which lead to high daily net CO2 uptake. Leaf succulence allowed substantial daily net CO2 uptake when the soil water content was relatively low during the winter and the spring (January-March). Indeed, appreciable daily net CO2 uptake occurred throughout the year for A. tequilana at both localities, indicating that this CAM plant species can sequester carbon even during prolonged dry periods MH - Mexico|Jalisco MH - USA PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000169772000009 L2 - Agave tequilana;air temperature;cultivated plantations;drought;Mexico;photosynthetic photon flux;soil moisture content;subtropical;CRASSULACEAN ACID METABOLISM; OPUNTIA-FICUS-INDICA; STENOCEREUS-QUERETAROENSIS; GROWTH TEMPERATURE; CAM PLANTS; PHOTOSYNTHESIS; CULTIVATION; RESPONSES; RUBISCO SO - Biotropica 2001 ;33(2):312-318 3953 UI - 12381 AU - Pimienta V AU - Etchenique R AU - Buhse T AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Toulouse 3, CNRS, UMR 5623, Lab IMRCP, F-31062 Toulouse, FranceBuhse, T, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ 1001 Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - On the origin of electrochemical oscillations in the picric acid/CTAB two-phase system AB - The oscillatory picric acid/CTAB two-phase system-as introduced by Yoshikawa and Matsubara [J. Am. Chem. Soc. 1984, 106, 4423-4427]-has been revisited. UV-vis spectroscopic studies were presented that provide a clearer and new insight into the possible kinetic mechanism for the oscillatory behavior. It was shown that the key process in the system is the formation of 1: 1 ion pairs between picrate and CTA(+) at the liquid/liquid interface that desorb and move into the organic phase. Kinetic UV-vis experiments also showed that the presence of alcohol-which was essential to observe oscillatory behavior-inhibits the formation of ion pairs. In the course of this process, this inhibition is released presumably due to the transfer of the alcohol from the interface into the organic phase. The corresponding inhibition/acceleration dynamics were observed in a subsystem experiment as S-shaped, autocatalytic -like kinetics with respect to the ion-pair formation. A new mechanism based on Langmuir-Hinshelwood kinetics was proposed that includes the competitive adsorption of CTA(+), picrate, and the alcohol at the liquid/liquid interface. The release of inhibition, which depends on the concentration of vacant interface sites and which occurs autocatalytically, expresses the key process for the nonlinear behavior. Computer simulations were performed which confirm that the proposed kinetic mechanism is dynamically reasonable MH - France MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000172048900006 L2 - OIL-WATER INTERFACE; LIQUID-MEMBRANE; ELECTRICAL OSCILLATION; AUTOCATALYSIS; HYDROLYSIS; DYNAMICS; ALCOHOLS; MODELS; MOTION SO - Journal of Physical Chemistry A 2001 ;105(44):10037-10044 3954 UI - 13314 AU - Pineiro A AU - Brocos P AU - Amigo A AU - Gracia-Fadrique J AU - Lemus MG AD - Univ Santiago de Compostela, Fac Fis, Dept Fis Aplicada, E-15782 Santiago De Compostela, SpainUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis, Lab Superficies, Mexico City 04510, DF, MexicoAmigo, A, Univ Santiago de Compostela, Fac Fis, Dept Fis Aplicada, E-15782 Santiago De Compostela, Spain TI - Extended Langmuir isotherm for binary liquid mixtures AB - A new model for describing the surface tension of binary liquid mixtures as a function of the bulk composition over the whole concentration range is presented. We first derive an equation relating surface and bulk volume fractions that generalizes the Langmuir isotherm so as to cover the entire range of concentrations. By combining this isotherm with a new mixing rule for nonideal solutions, we obtain an equation with two adjustable parameters, one measuring the lyophobicity of one component and the other accounting for the effect of molecular interactions. The model provides an excellent description of surface tension data for a wide variety of solutions with pi (0) = sigma (A) - sigma (B) values ranging from 2.2 to 51.0 mN/m MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000169832600019 L2 - SURFACE-TENSION; EQUATION SO - Langmuir 2001 ;17(14):4261-4266 3955 UI - 11845 AU - Pino J AU - Borges P AU - Martinez M AU - Vargas M AU - Flores H AU - Estarron M AU - Fuentes V AD - Inst Invest Ind Alimenticia, Havana 19200, CubaCtr Invest & Asistencia Tecnol & Diseno Estado Ja, Guadalajara, Jalisco, MexicoInst Invest Fundamentales Agr Trop, Havana, CubaPino, J, Inst Invest Ind Alimenticia, Carretera del Guatao Km 3-1-2, Havana 19200, Cuba TI - Essential oil of Mentha spicata L. from Jalisco AB - The essential oil obtained by steam distillation of aerial parts of Mentha spicata L. grown in Jalisco was investigated by GC/MS. Fifty-three constituents were identified, of which carvone (36.4%) and limonene (14.5%) were the major components MH - Cuba MH - Mexico|Jalisco PB - CAROL STREAM: ALLURED PUBL CORP RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1041-2905 UR - ISI:000173711900006 L2 - Mentha spicata;Labiatae;spearmint;essential oil composition;carvone;limonene SO - Journal of Essential Oil Research 2001 ;13(6):409-410 3956 UI - 11659 AU - Pinzul A AU - Stern A AD - Univ Alabama, Dept Phys, Tuscaloosa, AL 35487, USACINVESTAV, Mexico City 14000, DF, MexicoPinzul, A, Univ Alabama, Dept Phys, Tuscaloosa, AL 35487, USA TI - Absence of the holographic principle in noncommutative Chern-Simons theory AB - We examine noncommutative Chern-Simons theory on a bounded spatial domain. We argue that upon 'turning on' the noncommutativity, the edge observables, which characterized the commutative theory, move into the bulk. We show this to lowest order in the noncommutativity parameter appearing in the Moyal star product. If one includes all orders, the hamiltonian formulation of the gauge theory ceases to exist, indicating that the Moyal star product must be modified in the presence of a boundary. Alternative descriptions are matrix models. We examine one such model, obtained by a simple truncation of Chern-Simons theory on the noncommutative plane, and express its observables in terms of Wilson lines MH - Mexico|Distrito Federal MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 6 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000174174000023 L2 - Chern-Simons theories;non-commutative geometry;boundary quantum field theory;WILSON LINES SO - Journal of High Energy Physics 2001 ;(11): 3957 UI - 11886 AU - Pisarchik AN AU - Kuntsevich BF AD - Ctr Invest Opt, Leon 37150, Gto, MexicoNatl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, ByelarusPisarchik, AN, Ctr Invest Opt, 115 Col Lomas Campestre, Leon 37150, Gto, Mexico TI - Nonlinear dynamics of a CO2 laser with current modulation and cavity detuning AB - A detailed numerical study of the dynamic behaviour of a CO2 laser under current modulation and cavity detuning has been performed on the basis of the complete laser model which takes into account vibrational-vibrational and vibrational-rotational energy exchanges in the active medium. We have shown that due to a relatively fast decrease in the laser response with increasing modulation frequency, nonlinear regimes (period doubling and chaos) can be obtained with cavity detuning either from the line centre or near the laser threshold. Comparison is made with a two-level equation model for the active medium MH - Byelarus MH - Mexico|Guanajuato PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000173431200003 L2 - nonlinear dynamics;CO2 laser;pump modulation;cavity detuning;CW CO2-LASER; DIODE-LASER; CHAOS; PARAMETERS; LOSSES; BEHAVIOR; MODELS; SYSTEM SO - Journal of Optics B-Quantum and Semiclassical Optics 2001 ;3(6):363-371 3958 UI - 12246 AU - Pisarchik AN AU - Arecchi FT AU - Meucci R AU - DiGarbo A AD - Ctr Invest Opt AC, Guanajuato 37150, MexicoInst Nazl Ott, I-50125 Florence, ItalyPisarchik, AN, Ctr Invest Opt AC, Loma Bosque 115,Fracc Lomas Campestre, Guanajuato 37150, Mexico TI - Synchronization of Shilnikov chaos in a CO2 laser with feedback AB - We offer the first type of control of a wildly intermittent chaos that is resistant to standard control methods. Under an external periodic action, the frequency of every unstable periodic orbit embedded within the chaotic attractor can be locked to the frequency of the parameter modulation displaying either complete or partial synchronization. The phase synchronization of Shilnikov chaos was observed at small modulation amplitudes MH - Italy MH - Mexico|Guanajuato PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000172526200017 L2 - COMPETING INSTABILITIES; SYSTEM; DYNAMICS; ORBITS; STABILIZATION; MODULATION SO - Laser Physics 2001 ;11(11):1235-1239 3959 UI - 13587 AU - Pisarchik AN AU - Corbalan R AD - Ctr Invesdt Opt, Leon 37150, Gto, MexicoUniv Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, SpainPisarchik, AN, Ctr Invesdt Opt, Loma Bosque 115,Col Lomas Campestre, Leon 37150, Gto, Mexico TI - Shift of attractor boundaries in a system with a slow harmonic parameter perturbation AB - In a dynamical system with coexisting attractors, a slow periodic modulation of a control parameter deforms attractor boundaries by shifting saddle-node and inverse period-doubling bifurcation points. Dynamical properties of these points are studied numerically and experimentally in a loss-driven CO2 laser with additional slow modulation of the cavity losses. Shifted positions of the bifurcation points depend on the amplitude and frequency of the control modulation. The new position of the saddle-node bifurcation point obeys a particular scaling law for small modulation frequencies and amplitudes. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000168993000002 L2 - nonlinear dynamics;chaos;bistability;CO2 laser;bifurcations;DRIVEN DYNAMICAL-SYSTEMS; COEXISTING ATTRACTORS; LASER; CHAOS; MULTISTABILITY; BIFURCATIONS; MODULATION; RESONANCE; TRACKING SO - Physica D 2001 ;150(1-2):14-24 3960 UI - 14037 AU - Pisarchik AN AU - Kuntsevich BF AU - Meucci R AU - Allaria E AD - Ctr Invest Opt, Leon 37150, Glo, MexicoNatl Acad Sci Byelarus, Stepanov Inst Phys, Minsk 220072, ByelarusIst Nazl Ott Applicata, I-50125 Florence, ItalyPisarchik, AN, Ctr Invest Opt, AC Loma Bosque 115,Col Lomas Compestr, Leon 37150, Glo, Mexico TI - Negative hysteresis in a laser with modulated parameters AB - The negative hysteresis at low frequencies (less than 10 Hz) is observed in a CO2 laser with modulated discharge current, The origin of this phenomenon is found in an additional loss modulation which can appear due to the heating of intracavity elements by laser radiation, The results of numerical simulations on the base of the complex laser model are in a good agreement with experimental results, (C) 2001 Published by Elsevier Science B.V MH - Byelarus MH - Italy MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000167751100018 L2 - CO2 laser;parameter modulation;hysteresis;UNSTABLE PERIODIC-ORBITS; SLOW MODULATION; CO2-LASER; STABILIZATION; DYNAMICS; NOISE; CHAOS SO - Optics Communications 2001 ;189(4-6):313-319 3961 UI - 14122 AU - Pisarchik AN AU - Meucci R AU - Arecchi FT AD - Ctr Invest Opt, Leon 37150, Gto, MexicoIst Nazl Ott Applicata, I-50125 Florence, ItalyUniv Florence, Dept Phys, I-50125 Florence, ItalyPisarchik, AN, Ctr Invest Opt, Loma Bosque 115,Col Lomas Compestre, Leon 37150, Gto, Mexico TI - Theoretical and experimental study of discrete behavior of Shilnikov chaos in a CO2 laser AB - The discrete distribution of homoclinic orbits has been investigated numerically and experimentally in a CO2 laser with feedback. The narrow chaotic ranges appear consequently when a laser parameter (bias voltage or feedback gain) changes exponentially. Up to six consecutive chaotic windows have been observed in the numerical simulation as well as in the experiments. Every subsequent incase in the number of loops in the upward spiral around the saddle focus is accompanied by the appearance of the corresponding chaotic window. The discrete character of homoclinic chaos is also demonstrated through bifurcation diagrams, eigenvalues of the fixed point, return maps, and return times of the return maps MH - Italy MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000167533100013 L2 - COMPETING INSTABILITIES; HOMOCLINIC ORBITS; DYNAMICS; FEEDBACK SO - European Physical Journal D 2001 ;13(3):385-391 3962 UI - 12909 AU - Pismis P AU - Colombon L AU - Mampaso A AU - Manteiga M AD - UNAM, Astron Inst, Mexico City 04510, DF, MexicoInst Nacl Astrofis Opt & Electr, Tonantzintla, MexicoInst Astrofis Canarias, E-38200 La Laguna, SpainUniv Vigo, Dept Fis Aplicada, Vigo 36200, SpainPismis, P, UNAM, Astron Inst, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - A closer view of the nucleus of NGC 4314 AB - We present a high-resolution kinematical study of the ionized gas in the circumnuclear region of NGC 4314. Our spectra reveal the presence of a central structure (apparently a ring or torus) located at similar to 2 arcsec from the nucleus, which we identify as the shocked interface between the nuclear bar and the gas inside the HII region ring MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000170945400025 L2 - RING SO - Astrophysics and Space Science 2001 ;276(2-4):539-543 3963 UI - 14716 AU - Pizio O AU - Patrykiejew A AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoPatrykiejew, A, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Density functional approach to adsorption of a polydisperse fluid in slit-like pores AB - An extension of the Kierlik-Rosinberg version of density functional theory to the case of a polydisperse fluid of hard spheres in cont act with a single wall and also adsorbed in slit-like pores is presented. A comparison with Monte Carlo results show that the theory is capable of precisely reproducing density profiles of a polydisperse fluid near a hard wall. Several model calculations of adsorption in slit like pores are presented. The influence of the confinement on the polydispersity, as compared with bulk fluid, is discussed MH - Mexico|Distrito Federal MH - Poland PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000165844700007 L2 - HARD-SPHERE FLUID; ORTHOGONAL POLYNOMIAL-EXPANSIONS; INTEGRAL-EQUATION THEORY; STATISTICAL THERMODYNAMICS; STATIC STRUCTURE; APPROXIMATION; MIXTURE; MODEL; SCATTERING; SYSTEMS SO - Molecular Physics 2001 ;99(1):57-63 3964 UI - 12795 AU - Planer-Friedrich B AU - Armienta MA AU - Merkel BJ AD - Freiberg Univ Min & Technol, Inst Geol, D-09599 Freiberg, GermanyUniv Nacl Autonoma Mexico, Inst Geophys, Mexico City 04510, DF, MexicoPlaner-Friedrich, B, Freiberg Univ Min & Technol, Inst Geol, Gustav Zeuner Str 12, D-09599 Freiberg, Germany TI - Origin of arsenic in the groundwater of the Rioverde basin, Mexico AB - Groundwater in the semiarid Rioverde basin in the northern part of Mexico was investigated with respect to major and minor elements including arsenic, as well as As(III) and As(V). The total arsenic concentrations varied from less than 5 to 50 g/L. The in situ arsenic determination method produced reliable results with deviations from -5.6 to 2.2 g/L compared to laboratory HGAAS. Since arsenic and barium were found to be inversely correlated, it was suspected that precipitation of barium arsenate controlled arsenic solubility. Thermodynamically modeling by means of PHREEQC indicated that BaHAsO4.H2O (not BaAsO4) might be a limiting phase, however only at higher concentrations than those determined in this study. Increased arsenic groundwater concentrations were found with lacustrine sediments and decreased concentrations with fluvial Quaternary sediments. Increased total arsenic concentrations correlate with increased As(III) concentrations in the groundwater of the lacustrine sediments MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000171259300013 L2 - arsenic;barium;Ba-3(AsO4)(2);BaHAsO4 center dot H2O;field determination;geochemical modeling;hydride generation atomic absorption;spectroscopy (HGAAS);limiting mineral phase;speciation;BARIUM ARSENATE; SOLUBILITY SO - Environmental Geology 2001 ;40(10):1290-1298 3965 UI - 12709 AU - Plaster N AU - Tawil R AU - Tristani-Firouzi M AU - Canun S AU - Bendahhou S AU - Soemori A AU - Donaldson MR AU - Iannaccone S AU - Brunt E AU - Barohn R AU - Clark J AU - Deymeer F AU - George A AU - Hahn A AU - Nitu A AU - Serdaroglu P AU - Subramony SH AU - Wolfe G AU - Fu YH AU - Ptacek LJ AD - Univ Utah, Dept Human Genet, Salt Lake City, UT 84112, USAUniv Utah, Howard Hughes Med Inst, Salt Lake City, UT 84112, USAUniv Utah, Dept Neurol, Salt Lake City, UT 84112, USAUniv Utah, Dept Anat & Neurobiol, Salt Lake City, UT 84112, USAUniv Utah, Dept Pediat, Salt Lake City, UT 84112, USAUniv Rochester, Sch Med, Rochester, NY 14627, USAGen Hosp, Dept Genet, Calz De Tlalpan, MexicoTexas Scottish Rite Hosp Children, Dept Neurol, Dallas, TX 75219, USAAcad Ziekenhuis, Neurol Klin, Groningen, NetherlandsUniv Kansas, Med Ctr, Dept Neurol, Kansas City, KS 66103, USAChildrens Hosp, Ctr Med, Akron, OH 44308, USAUniv Istanbul Tip Fak, Norol Anabilim, Capa, TurkeyVanderbilt Univ, Ctr Med, Nashville, TN 37232, USACtr Hlth Sci, Dept Clin & Neurol Sci, London, ON, CanadaUniv Mississippi, Med Ctr, Dept Neurol, Jackson, MS 39216, USAUniv Texas, SW Med Ctr, Dallas, TX, USA TI - Mutations in Kir2.1 cause the developmental and episodic electrical phenotypes of Andersen's Syndrome MH - Canada MH - Mexico|Distrito Federal MH - Netherlands MH - Turkey MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0960-8966 UR - ISI:000170822100211 L2 - channelopathy;Andersen's Syndrome;Kir2.1 SO - Neuromuscular Disorders 2001 ;11(6-7):667-668 3966 UI - 13671 AU - Plaster NM AU - Tawil R AU - Tristani-Firouzi M AU - Canun S AU - Bendahhou S AU - Tsunoda A AU - Donaldson MR AU - Iannaccone ST AU - Brunt E AU - Barohn R AU - Clark J AU - Deymeer F AU - George AL AU - Fish FA AU - Hahn A AU - Nitu A AU - Ozdemir C AU - Serdaroglu P AU - Subramony SH AU - Wolfe G AU - Fu YH AU - Ptacek LJ AD - Univ Utah, Dept Human Genet, Salt Lake City, UT 84112, USAUniv Utah, Howard Hughes Med Inst, Salt Lake City, UT 84112, USAUniv Utah, Dept Neurol, Salt Lake City, UT 84112, USAUniv Utah, Dept Neurobiol & Anat, Salt Lake City, UT 84112, USAUniv Utah, Dept Pediat, Salt Lake City, UT 84112, USAUniv Rochester, Sch Med, Rochester, NY 14642, USAHosp Gen Dr Manuel Gea Gonzalez, Dept Genet, Mexico City 14000, DF, MexicoTexas Scottish Rite Hosp Children, Dept Neurol, Dallas, TX 75219, USAUniv Groningen, Univ Med Ctr Groningen, Acad Ziekenhuis Groningen, Neurol Klin, NL-9700 RB Groningen, NetherlandsUniv Kansas, Med Ctr, Dept Neurol, Kansas City, KS 66160, USAChildrens Hosp, Med Ctr, Akron, OH 44308, USAUniv Istanbul, Tip Fak, Noroloji Anabilim, TR-34390 Istanbul, TurkeyVanderbilt Univ, Med Ctr, Nashville, TN 37232, USALondon Hlth Sci Ctr, Dept Clin & Neurol Sci, London, ON N6A 4GA, CanadaIndiana Univ, Med Ctr, Dept Neurol, Indianapolis, IN 46202, USAUniv Texas, SW Med Ctr, Dallas, TX 75390, USAPtacek, LJ, Univ Utah, Dept Human Genet, Salt Lake City, UT 84112, USA TI - Mutations in Kir2.1 cause the developmental and episodic electrical phenotypes of Andersen's syndrome AB - Andersen's syndrome is characterized by periodic paralysis, cardiac arrhythmias, and dysmorphic features. We have mapped an Andersen's locus to chromosome 17q23 (maximum LOD = 3.23 at theta = 0) near the inward rectifying potassium channel gene KCNJ2. A missense mutation in KCNJ2 (encoding D71V) was identified in the linked family. Eight additional mutations were identified in unrelated patients. Expression of two of these mutations in Xenopus oocytes revealed loss of function and a dominant negative effect in Kir2.1 current as assayed by voltage-clamp. We conclude that mutations in Kir2.1 cause Andersen's syndrome. These findings suggest that Kir2.1 plays an important role in developmental signaling in addition to its previously recognized function in controlling cell excitability in skeletal muscle and heart MH - Canada MH - Mexico|Distrito Federal MH - Netherlands MH - Turkey MH - USA PB - CAMBRIDGE: CELL PRESS RP - NOT IN FILE U3 - TC 242 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 0092-8674 UR - ISI:000168840700010 L2 - HYPOKALEMIC PERIODIC PARALYSIS; RECTIFIER POTASSIUM CHANNEL; LONG QT SYNDROME; FUNCTIONAL EXPRESSION; K+ CHANNEL; CARDIAC-ARRHYTHMIA; MOLECULAR-CLONING; GENE; INACTIVATION; SUBUNITS SO - Cell 2001 ;105(4):511-519 3967 UI - 14165 AU - Plata C AU - Meade P AU - Hall A AU - Welch RC AU - Vazquez N AU - Hebert SC AU - Gamba G AD - Univ Nacl Autonoma Mexico, Inst Nacl Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City 14000, DF, MexicoYale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06520, USAVanderbilt Univ, Med Ctr, Dept Med, Div Nephrol, Nashville, TN 37232, USAGamba, G, Univ Nacl Autonoma Mexico, Inst Nacl Nutr Salvador Zubiran, Mol Physiol Unit, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Alternatively spliced isoform of apical Na+-K+-Cl(-)cotransporter gene encodes a furosemide-sensitive Na+-Cl(-)cotransporter AB - In the absence of vasopressin, medullary thick ascending limb cells express a K+-independent, furosemide-sensitive Na+-Cl- cotransporter that is inhibited by hypertonicity. The murine renal specific Na+-K+-2 Cl- cotransporter gene (SLC12A1) gives rise to six alternatively spliced isoforms. Three feature a long COOH-terminal domain that encodes the butmetanide-sensitive Na+-K+-2 Cl- cotransporter (BSC1-9/NKCC2), and three with a short COOH-terminal domain, known as mBSC1-A4, B4, or F4 (19). Here we have determined the functional characteristics of mBSC1-A4, as expressed in Xenopus laevis oocytes. When incubated at normal oocyte osmolarity (similar to 200 mosmol/kgH(2)O), mBSC1-4-injected oocytes do not express significant Na+ uptake over H2O-injected controls, and immunohistochemical analysis shows that the majority of mBSC1-4 protein is in the oocyte cytoplasm and not at the plasma membrane. In contrast, when mBSC1-4 oocytes are exposed to hypotonicity (similar to 100 mosmol/kgH(2)O), a significant increase in Na+ uptake but not in Rb-86(+) uptake is observed. The increased Na+ uptake is Cl- dependent, furosemide sensitive, and cAMP sensitive but K+ independent. Sodium uptake increases with decreasing osmolarity between 120 and 70 mosmol/kgH(2)O (r = 0.95, P < 0.01). Immunohistochemical analysis shows that in hypotonic conditions mBSC1-A4 protein is expressed in the plasma membrane. These studies indicate that the mBSC1-A4 isoform of the SLC12A1 gene encodes a hypotonically activated, cAMP- and furosemide-sensitive Na+-Cl- cotransporter. Thus it is possible that alternative splicing of the BSC1 gene could provide the molecular mechanism enabling the Na+-Cl--to-Na+-K+-2Cl(-) switching in thick ascending limb cells MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000167461600003 L2 - bumetanide;protein kinase A;adenosine 3 ',5 '-cyclic monophosphate;thick ascending limb of Henle;THICK ASCENDING LIMB; TRANS-EPITHELIAL VOLTAGE; NACL TRANSPORT; NA-K-2CL COTRANSPORTER; NA+-K+-2CL COTRANSPORT; KIDNEY MEMBRANES; CL COTRANSPORTER; NA+-CL; ABSORPTION; CLONING SO - American Journal of Physiology-Renal Physiology 2001 ;280(4):F574-F582 3968 UI - 14340 AU - Plebanski JF AU - Przanowski M AU - Turrubiates FJ AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoLodz Tech Univ, Inst Phys, PL-93005 Lodz, PolandPlebanski, JF, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Induced symplectic connection on the phase space AB - It is shown that the general theory of lifting the tensor fields from a Riemannian manifold M to its tangent bundle TM enables one to define in a natural mariner the unique sympletic connection on the phase space T*M which is induced by the Levi-Civita connection on M. This is exactly the symplectic connection given also by Bordemann, Neumaier and Waldmann Commun. Math. Phys. 198, 363 (1998); J. Geom. Phys. 29, 199 (1999). Relationship between the symplectic and Riemannian geometries on T*M and M is considered MH - Mexico|Distrito Federal MH - Poland PB - KRAKOW: ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0587-4254 UR - ISI:000166855800001 L2 - FEDOSOV STAR PRODUCTS; DEFORMATION QUANTIZATION; COTANGENT BUNDLES; EXISTENCE; WEYL SO - Acta Physica Polonica B 2001 ;32(1):3-15 3969 UI - 12821 AU - Poblano A AU - Rothenberg SJ AU - Schnaas L AU - Elias Y AU - Cruz ML AD - Natl Inst Commun Disorders, Mexico City, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoNatl Inst Perinatol, Mexico City, DF, MexicoNatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoCharles R Drew Univ Med & Sci, Los Angeles, CA 90059, USAPoblano, A, Natl Inst Commun Disorders, Mexico City, DF, Mexico TI - Spatial distribution of EEG theta activity as a function of lifetime lead exposure in 9-year-old children AB - The relationship between low-level childhood lead exposure and developmental retardation has been proposed but the existing evidence is weak. We examined the EEG of 42 children participating in the Mexico City, Prospective Lead Study to determine if relative theta power and distribution across the scalp was related to history of lifetime lead exposure as measured by sequential blood lead concentration of the mother during pregnancy and the child after delivery. EEG was recorded from scalp electrodes placed according to the 10-20 system during eyes-closed. Theta activity (4-7 Hz) was filtered with a fast Fourier transform (FFT) and relative power calculated. The expected distribution of theta was found, with the greatest relative power centrally located and lesser amounts at frontal, occipital, and lateral derivations. Multiple regression models of theta at each electrode showed that increasing postnatal blood lead from 6 to 96 months was related to increasing relative theta power, adjusted for age, sex and fetal suffering at delivery, in occipital derivations. The most significant increases in theta power were associated with blood lead levels (geometric mean = 10.3 mug/dl) measured between 54 and 72 months. Spatially weighted regression demonstrated that there was a significant antero-posterior gradient in lead-induced increase in relative theta power associated with postnatal blood lead levels at 54-72 months and 78-96 months. The greatest lead effect on both occipital relative theta power and the antero-posterior gradient of theta power was found with lead at an age during which relative theta power reaches its developmental maximum and starts to decrease. Results suggest that 54-72 months represent a critical period during which lead can exert lasting effects on the developmental pattern of theta activity. Occipital derivation of the largest effects of lead on theta activity may also be related to other lead-related developmental deficits. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LITTLE ROCK: INTOX PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences;Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0161-813X UR - ISI:000171118100003 L2 - EEG;theta activity;lead;Pb;children;development;spatial analysis;SCHOOL-AGE CHILDREN; BLOOD LEAD; PORT PIRIE; ADOLESCENTS; FREQUENCY; WORKERS; COHORT; POWER SO - Neurotoxicology 2001 ;22(4):439-446 3970 UI - 11664 AU - Pohlan J AD - Univ Bonn, Inst Obstbau & Gemusebau, D-53121 Bonn, GermanyECOSUR, Tapachula 30700, Chiapas, MexicoPohlan, J, Univ Bonn, Inst Obstbau & Gemusebau, Hugel 6, D-53121 Bonn, Germany TI - Ecological fruits - an alternative for the transformation of drug cultivation in the Cauca Department, Colombia AB - The ecological fruticulture in the Cauca Department, Colombia, is characterized by different tropical and non-tropical fruits and can been one alternative to transform the drug cultivation area. This paper include a short description of the Colombian and Cauca agriculture, analyze different cropping systems of the coca plant and present their impacts on economic, ecological and social approaches. Experiences, examples and problems of the ecological cultivation of pineapple, mango, guava and blackberry in the Cauca are given and opportunities for a sustainable fruit management are demonstrated MH - Germany MH - Mexico|Chiapas PB - WITZENHAUSEN: VERLAG TROPENLANDWIRT RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - German IS - 0041-3186 UR - ISI:000174151800009 L2 - Colombia;Cauca;transformation possibilities;drug plants;ecological fruits;coca;pineapple;mango;guava;blackberry SO - Journal of Agriculture in the Tropics and Subtropics 2001 ;102(2):169-183 3971 UI - 13995 AU - Polupan GP AU - Torchynska TV AU - Gomez JP AU - Gonzalez HAF AU - Espinoza FGB AU - Torre AI AU - Bulakh BM AU - Scherbina LV AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoNatl Acad Sci, Inst Semicond Phys, UA-252028 Kiev, UkrainePolupan, GP, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Comparative investigations of surface structure, photoluminescence and its excitation in silicon wires AB - The dependence of the photoluminescence (PL) and PL excitation spectra on the porous silicon top surface structure and the oxide composition on it has been investigated. Researches were carried out using the following methods: FL, PL excitation, electron paramagnetic resonance, atomic force microscope and X-ray photoelectron emission spectroscopy. Results indicate a direct correlation between the suboxide content and roughness structure on the surface with PL intensity. No correlation was noted between the PL intensity and the concentration of Si dangling bonds (non-radiative recombination centers). These results have given further support to a suboxide-related color center on the Si/SiOx interface as the source of the intense red luminescence of silicon wires. (C) 2001 Elsevier Science BN. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 0368-2048 UR - ISI:000167832700035 L2 - porous silicon;photoluminescence;AFM;XPS;luminescence excitation;POROUS SILICON; SI; LUMINESCENCE SO - Journal of Electron Spectroscopy and Related Phenomena 2001 ;114():235-241 3972 UI - 13177 AU - Ponce M AU - Arau J AU - Alonso JM AU - Rico-Secades M AD - CENIDET Elect, Cuernavaca 62050, Morelos, MexicoUniv Oviedo, ATE, Gijon 33204, SpainPonce, M, CENIDET Elect, POB 5-164, Cuernavaca 62050, Morelos, Mexico TI - Analysis of the class E amplifier used as electronic ballast with dimming capability for photovoltaic applications AB - The analysis and design of a dimmable electronic ballast based on the class E amplifier and fed from solar cells with 12 V backup batteries is described. The class E amplifier uses a capacitive impedance inverter as resonant tank and one diode antiparallel with the switch; these elements allow implementation of a dimming feature for the ballast and ignition of the lamp while maintaining zero voltage commutations in the switch. The designed electronic ballast drives a 21 W lamp and operates at a switching frequency of 370 kHz. Dimming is implemented using an SG3524 in a voltage-con trolled oscillator fashion MH - Mexico|Morelos MH - Spain PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0020-7217 UR - ISI:000170213600009 L2 - TUNED POWER-AMPLIFIER SO - International Journal of Electronics 2001 ;88(7):831-846 3973 UI - 13244 AU - Pondella DJ AU - Allen LG AU - Casian JAR AU - Hovey TE AD - Occidental Coll, Moore Lab Zool, Dept Biol, Vantuna Res Grp, Los Angeles, CA 90041, USACalif State Univ Northridge, Dept Biol, Northridge, CA 91330, USACtr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada, Baja California, MexicoCalif Dept Fish & Game, San Diego, CA 92123, USAPondella, DJ, Occidental Coll, Moore Lab Zool, Dept Biol, Vantuna Res Grp, 1600 Campus Rd, Los Angeles, CA 90041 USA TI - Demographic parameters of golden spotted rock bass Paralabrax auroguttatus from the northern Gulf of California AB - The sex ratios, growth, and mortality of the golden spotted rock bass Paralabrax auroguttatus (Serranidae) were determined for populations from Islas Encantadas and Bahia de los Angeles in the Gulf of California. Specimens ranged from 137 to 479 mm standard length and from 135 to 3,100 g. Sagittal otoliths were used to determine age, A von Bertalanffy model of growth for both populations combined was estimated as L-t = 474.4 (1 - e-(0115(t + 2093))), where L-t is fish length at age t. This model is comparable to those for other rock basses. The relationship between length and weight (W) followed the power function W = 0.00002 .L-3.0797 (r(2) = 0.96) with no difference between males and females, The mortality rate was estimated as 49% per year for fish of age 5 and older. In our Bahia de los Angeles samples, the sex ratio was significantly skewed. with more males than females. The mean size of females was significantly smaller at Bahia de los Angeles than in Islas Encantadas. Examination of the sex ratios for these two populations suggested that this species is gonochoristic MH - USA MH - Mexico|Baja California PB - BETHESDA: AMER FISHERIES SOC RP - NOT IN FILE U3 - TC 3 U4 - Fisheries U5 - J;Article AV - English IS - 0002-8487 UR - ISI:000169852700013 L2 - SOUTH-ATLANTIC BIGHT; EASTERN GULF; MYCTEROPERCA-MICROLEPIS; VERMILION SNAPPER; SAND BASS; SEX-RATIO; RED HIND; GROWTH; SERRANIDAE; AGE SO - Transactions of the American Fisheries Society 2001 ;130(4):686-691 3974 UI - 14027 AU - Ponticelli C AU - Yussim A AU - Cambi V AU - Legendre C AU - Rizzo G AU - Salvadori M AU - Kahn D AU - Kashi SH AU - Salmela K AU - Fricke L AU - Garcia-Martinez J AU - Lechler R AU - Heemann U AU - Monteon F AU - Ortuno J AU - Amenabar JJ AU - Arias M AU - Nicholson ML AU - Sperschneider H AU - Abendroth D AU - Gracida C AU - Lao M AU - Sever MS AU - Lameire N AU - Sanchez-Fructuoso A AU - Basci A AU - Segoloni G AU - Connolly J AU - Altieri P AU - Akoh J AU - Prestele H AU - Girault D AD - Osped Maggiore, IRCCS, Div Nefrol & Dialisi, I-20122 Milan, ItalyRabin Med Ctr, Petah Tiqwa, IsraelOsped Policlin, Parma, ItalyHop St Louis, Paris, FranceOsped Santa Chiara, Pisa, ItalyPoliclin Careggi, Florence, ItalyGroote Schuur Hosp, ZA-7925 Cape Town, South AfricaWalsgrave Gen Hosp, Coventry CV2 2DY, W Midlands, EnglandUniv Helsinki Hosp, Helsinki, FinlandChirurg Klin, Lubeck, GermanyHosp La Fe, E-46009 Valencia, SpainHammersmith Hosp, London, EnglandUniv Essen Gesamthsch Klinikum, D-4300 Essen, GermanyHosp Especialidades, Guadalajara, Jalisco, MexicoHosp Ramon y Cajal, E-28034 Madrid, SpainHosp Cruces, Baracaldo, SpainHosp Marques de Valdecilla, Santander, SpainGen Hosp, Leicester, Leics, EnglandUniv Jena, Klinikum, D-6900 Jena, GermanyUniv Ulm Klinikum, Ulm, GermanyHosp Especialidades, Mexico City, DF, MexicoInst Transplantol, Warsaw, PolandIstanbul Univ, Istanbul, TurkeyUZ, Ghent, BelgiumHosp San Carlos, Madrid, SpainEge Univ, Izmir, TurkeyOsped Molinette, Turin, ItalyBelfast City Hosp, Belfast BT9 7AD, Antrim, North IrelandOsped Brotzu, Cagliari, ItalySt Marys Hosp, London, EnglandNovartis Pharma AG, Basel, SwitzerlandPonticelli, C, Osped Maggiore, IRCCS, Div Nefrol & Dialisi, Via della Commenda 15, I-20122 Milan, Italy TI - Basiliximab significantly reduces acute rejection in renal transplant patients given triple therapy with azathioprine MH - Belgium MH - United Kingdom MH - Finland MH - France MH - Germany MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Poland MH - South Africa MH - Spain MH - Switzerland MH - Turkey PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Surgery;Transplantation U5 - J;Article AV - English IS - 0041-1345 UR - ISI:000167629900474 L2 - ACUTE CELLULAR REJECTION; ALLOGRAFT RECIPIENTS; MONOCLONAL-ANTIBODY SO - Transplantation Proceedings 2001 ;33(1-2):1009-1010 3975 UI - 12459 AU - Poon AHY AU - Jimenez-Corona A AU - Palacios-Martinez M AU - Sifuentes-Osornio J AU - Ponce-de-Leon A AU - Bobadilla M AU - Kato M AU - Small PM AU - Garcia MLG AU - Schurr E AD - McGill Univ, Ctr Study Host Resistance, Montreal, PQ, CanadaInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoStanford Univ, Stanford, CA 94305, USA TI - Development of high-throughput genotyping assays and their application to the study of tuberculosis susceptibility MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901300 SO - American Journal of Human Genetics 2001 ;69(4):404-404 3976 UI - 13688 AU - Pope KO AU - Pohl MED AU - Jones JG AU - Lentz DL AU - von Nagy C AU - Vega FJ AU - Quitmyer IR AD - Geo Eco Arc Res, Aquasco, MD 20608, USAFlorida State Univ, Dept Anthropol, Tallahassee, FL 32306, USATexas A&M Univ, Dept Anthropol, College Stn, TX 77843, USANew York Bot Garden, Bronx, NY 10458, USATulane Univ, Dept Anthropol, New Orleans, LA 70118, USANatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoFlorida Museum Nat Hist, Dept Nat Hist, Gainesville, FL 32611, USAPope, KO, Geo Eco Arc Res, 16305 St Marys Church Rd, Aquasco, MD 20608 USA TI - Origin and environmental setting of ancient agriculture in the lowlands of mesoamerica AB - Archaeological research in the Gulf Coast of Tabasco reveals the earliest record of maize cultivation in Mexico. The first farmers settled along beach ridges and lagoons of the Grijalva River delta. Pollen from cultivated Zea appears with evidence of forest clearing about 5100 calendar years B.C. (yr B.C.) [6200 C-14 years before the present (yr B.P.)]. Large Zea sp. pollen, typical of domesticated maize (Zea mays), appears about 5000 calendar yr B.C. (6000 yr B.P.). A Manihot sp. pollen grain dated to 4600 calendar yr B.C. (5800 yr B.P.) may be from domesticated manioc. About 2500 calendar yr B.C. (4000 yr B.P.), domesticated sunflower seeds and cotton pollen appear as farming expanded MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 44 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000168862900044 L2 - MAIZE SO - Science 2001 ;292(5520):1370-1373 3977 UI - 10539 AU - Portelles J AU - Siqueiros JM AU - Font R AU - Garcia S AU - Suarez N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaSiqueiros, JM, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - Effect of the electric field on the piezoelectric properties of PMN-PFN ceramics AB - A study of the effect of the electric field on the piezoelectric properties in the induced piezoelectric ceramic (1-x)PMN-xPFN, x = 0.2, 0.3 is presented. Also the effect of the variation of the Fe content on the electromechanical properties of the ceramic is analyzed observing that the electromechanical efficiency decreases when either the electric field is increased or the concentration of the ferroactive Fe cation is decreased MH - Cuba MH - Mexico|Baja California PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000177287300007 L2 - ferroelectric ceramics;piezoelectricity;PMN-PFN ceramics;DIELECTRIC-PROPERTIES SO - Ferroelectrics 2001 ;249(3-4):269-277 3978 UI - 14503 AU - Poteau R AU - Ortega I AU - Alary F AU - Solis AR AU - Barthelat JC AU - Daudey JP AD - Univ Toulouse 3, Phys Quant Lab, CNRS, IRSAMC,UMR 5626, F-31062 Toulouse, FranceUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoPoteau, R, Univ Toulouse 3, Phys Quant Lab, CNRS, IRSAMC,UMR 5626, 118 Route de Narbonne, F-31062 Toulouse, France TI - Effective group potentials. 1. Method AB - in the first paper of this series, we will describe a method, called effective group potentials (EGP), aimed at simplifying molecular ab initio calculations for large systems involving bulky ligands as long as these ligands can he supposed to play the role of spectator groups. This method should be applicable to all types of bondings between active and the spectator parts. The different steps used in the definition of the ECP are closely related to those used for atomic effective core potentials (ECP) which are commonly used with great success in ab initio calculations involving heavy atoms MH - France MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 33 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000166324500027 L2 - EMBEDDED-CLUSTER CALCULATIONS; CORE POLARIZATION POTENTIALS; TEMPERED ATOMIC ORBITALS; COMPACT MODEL POTENTIALS; ABINITIO MO METHOD; ELECTRONIC-STRUCTURE; MOLECULAR-SYSTEMS; TRANSITION-METALS; SPECTATOR GROUPS; REPRESENTATION SO - Journal of Physical Chemistry A 2001 ;105(1):198-205 3979 UI - 13498 AU - Potekhin AY AU - Turbiner AV AD - AF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaUniv Paris Sud, Phys Theor Lab, F-91405 Orsay, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPotekhin, AY, AF Ioffe Phys Tech Inst, Politekhnicheskaya 26, St Petersburg 194021, Russia TI - Hydrogen atom in a magnetic field: The quadrupole moment AB - The quadrupole moment of a hydrogen atom in a magnetic field B for field strengths from 0 to 4.414 x 10(13) G is calculated by two different methods. The first method is variational, and based on a single trial function. The second method deals with a solution of the Schrodinger equation in the form of a linear combination of Landau orbitals MH - France MH - Mexico|Distrito Federal MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000169134800104 L2 - TRANSITIONS SO - Physical Review A 2001 ;6306(6): 3980 UI - 12960 AU - Powell A AU - Minson P AU - Trapaga G AU - Pal U AD - MIT, Dept Mat Sci & Engn, Cambridge, MA 02139, USAIPN, CINVESTAV, Unidad Queretaro, Lab Invest Mat, Queretaro 76230, Qro, MexicoIntel Corp, Rio Rancho, NM 87124, USABoston Univ, Dept Mfg Engn, Boston, MA 02446, USAPowell, A, MIT, Dept Mat Sci & Engn, Cambridge, MA 02139, USA TI - Mathematical modeling of vapor-plume focusing in electron-beam evaporation AB - A Monte Carlo model of titanium evaporating from a disk surface shows that collisions between evaporant atoms give rise to plume focusing from the ideal cosine distribution to a cos' distribution, as has been widely reported in experiments. Further, it is shown that under conditions in which hard-sphere models are accurate, the cosine power of the distribution (which indicates the extent of focusing) and the fraction of evaporant atoms which recondense at the source are both universal functions of an effective local Knudsen number for the source, which can be empirically fitted to a simple functional form. This function leads to the property that, for a given total evaporation rate, a smaller and more intense vapor source gives rise to more focusing than a broader source. Ring sources are also modeled, and, for a given ratio of ring thickness to outer radius, these also show a dependence of the cosine power and recondensation fraction on the local Knudsen number MH - Mexico|Queretaro MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000170682200008 SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2001 ;32(8):1959-1966 3981 UI - 12784 AU - Poznyak AS AU - Najim K AD - Fiole Natl Super Ingenieurs Genie Chim, Proc Control Lab, F-31078 Toulouse, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07300, DF, MexicoPoznyak, AS, Fiole Natl Super Ingenieurs Genie Chim, Proc Control Lab, Chemin Loge, F-31078 Toulouse, France TI - Bush-Mosteller learning for a zero-sum repeated game with random pay-offs AB - This paper deals with the design and analysis of a modified version of the Bush-Mosteller reinforcement scheme applied by partners in a zero-sum repeated game with random pay-offs. The suggested study is based on the learning automata paradigm and a limiting average reward criterion is tackled to analyse the arising Nash equilibrium. No information concerning the distribution of the pay-off is a priori available. The novelty of the suggested adaptive strategy is related to the incorporation of a 'normalization procedure' into the standard Bush-Mosteller scheme to provide a possibility to operate not only with binary but also with any bounded rewards of a stochastic nature. The analysis of the convergence (adaptation) as well as the convergence rate (rate of adaptation) are presented and the optimal design parameters of this adaptive procedure are derived. The obtained adaptation rate turns out to be of o(n(-1/3)) MH - France MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Computer Science, Theory & Methods;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7721 UR - ISI:000171158900007 L2 - REINFORCEMENT; EQUILIBRIA SO - International Journal of Systems Science 2001 ;32(10):1251-1260 3982 UI - 13342 AU - Poznyak AS AU - Ljung L AD - Inst Politecn Nacl, CINVESTAV, Dept Automat Control, Mexico City 07000, DF, MexicoLinkoping Univ, Dept Elect Engn, S-58183 Linkoping, SwedenPoznyak, AS, Inst Politecn Nacl, CINVESTAV, Dept Automat Control, AP 14 740, Mexico City 07000, DF, Mexico TI - On-line identification and adaptive trajectory tracking for nonlinear stochastic continuous time systems using differential neural networks AB - Identification of nonlinear stochastic processes via differential neural networks is discussed. A new "dead-zone" type learning law for the weight dynamics is suggested. By a stochastic Lyapunov-like analysis the stability conditions for the identification error as well as for the neural network weights are established. The adaptive trajectory tracking using the obtained neural network model is realized for the subclass of stochastic completely controllable processes linearly dependent on control. The upper bounds for the identification and adaptive tracking errors are established, (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Sweden PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000169811200011 L2 - dynamic neural networks;stochastic processes;identification;adaptive control SO - Automatica 2001 ;37(8):1257-1268 3983 UI - 12212 AU - Prasanna BM AU - Vasal SK AU - Kassahun B AU - Singh NN AD - Indian Agr Res Inst, Div Genet, New Delhi 110012, IndiaInt Maize & Wheat Improvement Ctr, Mexico City, DF, MexicoJima Coll Agr, Jima, EthiopiaIndian Agr Res Inst, Directorate Maize Res, New Delhi 110012, IndiaPrasanna, BM, Indian Agr Res Inst, Div Genet, New Delhi 110012, India TI - Quality protein maize AB - Maize (Zea mays L.) plays a very important role in human and animal nutrition in a number of developed and developing countries, worldwide. Breeding for improved protein quality in maize began in the mid-1960s with the discovery of mutants, such as opaque-2, that produce enhanced levels of lysine and tryptophan, the two amino acids deficient in maize endosperm proteins. However, adverse pleiotropic effects imposed severe constraints on successful exploitation of these mutants. Interdisciplinary and concerted research efforts led to amelioration of the negative features of the opaque phenotype, and the rebirth of 'Quality Protein Maize' (QPM). QPM holds superior nutritional and biological value and is essentially interchangeable with normal maize in cultivation and kernel phenotype. This paper deals with the salient sequence of events associated with the development of QPM, the present understanding of genetic, biochemical and molecular bases of QPM, and the recent technological developments that could potentially enhance the efficiency of QPM breeding and the reach of QPM cultivars MH - Ethiopia MH - India MH - Mexico|Distrito Federal PB - BANGALORE: CURRENT SCIENCE ASSN RP - NOT IN FILE U3 - TC 14 U4 - Multidisciplinary Sciences U5 - J;Review AV - English IS - 0011-3891 UR - ISI:000172632000020 L2 - REGULATORY LOCUS OPAQUE-2; STORAGE PROTEINS; GAMMA-ZEIN; COMBINING ABILITY; LYSINE CONTENT; ENDOSPERM; GENE; MUTATION; ENCODES; TRANSCRIPTION SO - Current Science 2001 ;81(10):1308-1319 3984 UI - 12521 AU - Prevot M AU - Hoffman KA AU - Goguitchaichvili A AU - Doukhan JC AU - Shcherbakov V AU - Bina M AD - CNRS, Lab Geophys Tecton & Sedimontol, F-34095 Montpellier 05, FranceUniv Montpellier 2, F-34095 Montpellier, FranceCalif Polytech State Univ San Luis Obispo, Dept Phys, San Luis Obispo, CA 93407, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Sci & Technol Lille, Lab Struct & Proprietes Etat Solide, F-59655 Villeneuve Dascq, FranceUnited Inst Phys Earth, Geophys Observ Borok, Borok 152742, Yarosloaskaya O, RussiaCNRS, Lab Geomagnetisme, F-94107 St Maur Des Fosses, FranceIPGP, F-94107 St Maur Des Fosses, FrancePrevot, M, CNRS, Lab Geophys Tecton & Sedimontol, F-34095 Montpellier 05, France TI - The mechanism of self-reversal of thermoremanence in natural hemoilmenite crystals: new experimental data and model AB - New magnetic and mineralogical findings on self-reversing hemoilmenite, (Fe2-y TiyO3) grains from Pinatubo lavas (1991 eruption) provide important clues regarding the acquisition process of reverse thermoremanent magnetization (rTRM) in this solid solution series. Magnetic force microscopy indicates the presence of multidomain magnetic structures in coexisting strongly and weakly magnetic crystallographic regions having compositions of y congruent to 0.54 and 0.53, respectively. Continuous thermal demagnetization of natural and laboratory TRM carried out on both whole rock samples and single hemoilmenite crystals shows that the magnitude of a normal TRM (nTRM) component, observed at temperatures above the Curie point of the self-reversing phase, is much too large to be carried by a phase that is entirely cation-disordered. Consistent with this observation are findings using transmission electron microscopy (TEM) which, in contrast to that what is commonly assumed, reveals the weakly magnetic regions to be magnetically heterogeneous. Specifically, these regions are found to contain tiny (20-40 nm) domains that are cation-ordered and evidently ferrimagnetic dispersed within the cation-disordered, presumably spin-canted antiferromagnetic matrix. Given these findings, we argue that the so-called nTRM-carrying x-phase is itself partially cation-ordered, and, thus, ferrimagnetic, as postulated first by Ishikawa and Syono (J. Phys. Soc., Jpn. 17 (1962) 714). We propose a "nanophase" self-reversal model for the ilmenite-hematite solid solution series in which the rTRM and nTRM components are carried by the cores and margins, respectively, of the tiny, partially cation-ordered nano-sized domains observed by TEM. Due to the partial cation order, both the core and the margin of each domain are expected to behave in a ferrimagnetic fashion at temperatures below their respective Curie points. However, given the kinetics of the ordering process, their cation distributions need be antiphase, which causes their magnetic moments to be oppositely aligned. Since it is most reasonable to consider each margin to be slightly more Fe-rich than the inside core, upon cooling, the margins acquire a magnetic remanence first (a nTRM). Then, upon further cooling, given that the intralayer and interlayer nearest-neighbor superexchange interactions are ferromagnetic and antiferromagnetic, respectively, the net magnetic moment of the core material need be oppositely aligned (producing a rTRM). The nano-sized regions would indeed behave in a superparamagnetic (SP) fashion if magnetically uncoupled to adjacent material; however, the spins in the margins (the x-phase) must be locked through superexchange to those of the surrounding disordered matrix, which we also claim to be locally enriched in iron. If so, then the magnetization of the x-phase can be both highly-coercive and thermally stable, as observed experimentally. Upon stepwise thermal demagnetization, the self-reversed remanence measured at room temperature is not destroyed until the unblocking temperature of the disordered Fe-enriched aureole (approximately 410 degreesC) is reached. Mineralogical considerations and magnetic evidence from previous works suggest that this model is generally valid for self-reversed dacitic pumice, in particular the Mt. Haruna dacite and the 1985 Nevado del Ruiz dacitic andesite. (C) 2001 Published by Elsevier Science B.V MH - France MH - Mexico|Distrito Federal MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000171818300007 L2 - magnetic force microscopy;electron transmission microscopy;self-reversal;thermoremanent magnetization;exchange interaction;ilmenite-hematite;dacite;pumice;pinatubo;Philippines;IRON-TITANIUM OXIDES; NEVADO-DEL-RUIZ; MAGNETIC-PROPERTIES; ILMENITE-HEMATITE; DACITIC PUMICE; REMANENT MAGNETIZATION; ORDER-DISORDER; 1985 ERUPTION; PINATUBO; PHILIPPINES SO - Physics of the Earth and Planetary Interiors 2001 ;126(1-2):75-92 3985 UI - 12155 AU - Pridgeon AM AU - Solano R AU - Chase MW AD - Royal Bot Gardens, Richmond TW9 3AB, Surrey, EnglandUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoPridgeon, AM, Royal Bot Gardens, Richmond TW9 3AB, Surrey, England TI - Phylogenetic relationships in Pleurothallidinae (Orchidaceae): Combined evidence from nuclear and plastid DNA sequences AB - To evaluate the monophyly of subtribe Pleurothallidinae (Epidendreae: Orchidaceae) and the component genera and to reveal evolutionary relationships and trends, we sequenced the nuclear ribosomal DNA internal transcribed spacers (ITS1 and ITS2) and 5.8S gene for 185 taxa. In addition, to improve the overall assessments along the spine of the topology, we added plastid sequences from matK, the trnL intron, and the trnL-F intergenic spacer for a representative subset of those taxa in the ITS study. All results were highly congruent, and so we then combined the sequence data from all three data sets in a separate analysis of 58 representative taxa. There is strong support in most analyses for the monophyly of Pleurothallidinae and in some for inclusion of Dilomilis and Neocognauxia of Laeliinae. Although most genera in the nine clades identified in the analyses are monophyletic, all data sets are highly congruent in revealing the polyphyly of Pleurothallis and its constitutent subgenera as presently understood, The high degree of homoplasy in morphological characters, especially floral characters, limits their usefulness in phylogenetic reconstruction of the subtribe MH - United Kingdom MH - Mexico|Distrito Federal PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 27 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000172797600018 L2 - ITS;matK;Orchidaceae;Pleurothallidinae;rDNA;trnL;CLADISTIC-ANALYSIS; DATA SETS; RBCL; ANGIOSPERMS; SYSTEMATICS; REGIONS; AMERICA SO - American Journal of Botany 2001 ;88(12):2286-2308 3986 UI - 12468 AU - Prieto R AU - Kossin JP AU - Schubert WH AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, CU, Mexico City 04510, DF, MexicoColorado State Univ, Ft Collins, CO 80523, USAPrieto, R, Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, CU, Circuito Invest Cient, Mexico City 04510, DF, Mexico TI - Symmetrization of lopsided vorticity monopoles and offset hurricane eyes AB - This paper is a contribution towards better understanding of the continually occurring symmetrization processes in tropical cyclones. Before a tropical cyclone develops an eye, it can often possess an asymmetric monopolar vorticity distribution. As an idealized initial condition in a non-divergent barotropic model, we use a lopsided monopole with different degrees of asymmetry of the monotonic vorticity field. We then study the axi-symmetrization process which involves the ejection of a winding spiral band. For extreme asymmetric initial conditions, the band can produce regions of barotropic instability, resulting in nonlinear mixing of vorticity and the formation of polygonal structures. In a second series of experiments, we study the case of a tropical cyclone with a developed eye, modelled as a hollow-tower vorticity distribution, i.e. an annular region of elevated vorticity, with low vorticity in the eye. If the eye is offset and the annular region of elevated vorticity is not of uniform width, complex symmetrization processes can occur, sometimes leading to a tripole structure of the hurricane's vorticity field. Long-lived hurricane eyes are found for initial conditions with a slight offset. For such initial conditions, passive tracers can remain in the eye for as long as 72 hours, showing that in this model it is possible for air inside the eye to remain there for long periods of time, while moving coherently with the storm. Predictions of the axi-symmetric final equilibrium states of the flow are obtained using the statistical mechanics theory of maximum Boltzmann mixing entropy. These predictions are then compared with results from the direct numerical integrations for both the lopsided monopole and the offset hurricane eye. The distribution of air-parcel tracers initially placed in selective regions of vorticity for the direct numerical integrations are compared with results from the statistical theory MH - Mexico|Distrito Federal MH - USA PB - READING: ROYAL METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0035-9009 UR - ISI:000171890500005 L2 - hurricane dynamics;maximum-entropy flows;VORTEX ROSSBY-WAVES; STATISTICAL-MECHANICS; POTENTIAL VORTICITY; SPIRAL BANDS; MODEL; TURBULENCE; STATES SO - Quarterly Journal of the Royal Meteorological Society 2001 ;127(577):2307-2327 3987 UI - 12773 AU - Prieto R AU - Schubert WH AD - Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523, USAPrieto, R, Natl Autonomous Univ Mexico, Ctr Ciencias Atmosfera, Circuito Invest Cientif, Mexico City 04510, DF, Mexico TI - Analytical predictions for zonally symmetric equilibrium states of the stratospheric polar vortex AB - Equilibrium states of initially barotropically unstable polar vortices are predicted using two different approaches: minimum enstrophy and maximum entropy theories, which have been extended to include flows evolving on the surface of a sphere. Minimum enstrophy theory shows very good agreement with an ensemble of direct numerical integrations of a polar vortex that mixes vorticity mainly on a spherical cap. For the case of a polar vortex with a substantial resistance to vorticity mixing at its core, the maximum entropy prediction shows good consistency with an ensemble of direct numerical integrations. Maximum entropy theory gives an additional source of information with its density functions, which in a probabilistic sense reveal how the vorticity field (and therefore the mass field) is redistributed in the equilibrium state. The density functions show good skill in predicting several passive tracer distributions in the numerical experiments. Also, from a local point of view, density functions determine the degree of mixing of initially well separated air masses, information that is valuable in tracing atmospheric chemical components MH - Mexico|Distrito Federal MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0022-4928 UR - ISI:000171133900003 L2 - PERFECT FLUID-DYNAMICS; 2-DIMENSIONAL TURBULENCE; STATISTICAL-MECHANICS; SELECTIVE DECAY; NONLINEAR EVOLUTION; COHERENT VORTICES; 2 DIMENSIONS; WAVES; CLASSIFICATION; RELAXATION SO - Journal of the Atmospheric Sciences 2001 ;58(18):2709-2728 3988 UI - 13287 AU - Prieur JL AU - Daigne G AU - Avila R AD - Observ Midi Pyrenees, CNRS, UMR Astrophys 5572, F-31400 Toulouse, FranceObserv Bordeaux, F-33270 Florac, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoPrieur, JL, Observ Midi Pyrenees, CNRS, UMR Astrophys 5572, 14 Ave Edouard Belin, F-31400 Toulouse, France TI - SCIDAR measurements at Pic du Midi AB - We present SCIDAR measurements made at the Pic du Midi Observatory with PISCO. A series of vertical profiles of the refractive-index structure constant C-N(2)(h) was obtained with the observations of the binary stars gamma and gamma Ari, with 30 second time sampling. In the free atmosphere, the turbulence was dominated by the contribution of a few well-separated atmospheric layers at altitudes in the range 8-20 km, with significant changes within a few minutes. We describe a new method based on the CLEAN algorithm applied on the 2-D covariance function of the irradiance fluctuations in the pupil plane and compare it with the widely-used Maximum Entropy Method applied on a slice of this 2-D function. Our method is much less sensitive to the noise. Vertical profiles of the wind velocity and direction were obtained with an automatic procedure working on the mean cross-correlation function of consecutive frames. Furthermore, we validate a model for the SCIDAR detectivity threshold in terms of distance to the turbulent layers MH - France MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000169942200039 L2 - atmospheric effects;site testing;turbulence;methods : data analysis techniques : image processing;GENERALIZED SCIDAR; SPECKLE OBSERVATIONS; DU-MIDI; TURBULENCE; SCINTILLATION; ASTROMETRY; STARS SO - Astronomy & Astrophysics 2001 ;371(1):366-377 3989 UI - 13452 AU - Primak S AU - Lyandres V AU - Kontorovich V AD - Univ Western Ontario, Dept Elect & Comp Engn, London, ON N6A 5B9, CanadaBen Gurion Univ Negev, Dept Elect & Comp Engn, IL-84105 Beer Sheva, IsraelPolytech Inst Mexico, Res Ctr Adv Study, Dept Elect Commun Engn, Mexico City 07000, DF, MexicoPrimak, S, Univ Western Ontario, Dept Elect & Comp Engn, London, ON N6A 5B9, Canada TI - Markov models of non-Gaussian exponentially correlated processes and their applications AB - We consider three different methods of generating non-Gaussian Markov processes with given probability density functions and exponential correlation functions. All models are based on stochastic differential equations. A number of analytically treatable examples are considered. The results obtained can be used in different areas such as telecommunications and neurobiology MH - Canada MH - Israel MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169285000008 L2 - TIME-SERIES; GENERATION; NOISE; RATCHETS; CLUTTER SO - Physical Review e 2001 ;63(6):art-061103 3990 UI - 14600 AU - Prokhorov EF AU - Gonzalez-Hernandez J AU - Gorev NB AU - Kodzhespirova IF AU - Kovalenko YA AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 760001, Queretaro, MexicoNatl Acad Sci Ukraine, Inst Tech Mech, Dept Funct Elements Control Syst, UA-49005 Dnepropetrovsk, UkraineProkhorov, EF, IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Gral Arteaga No 5,Apardo Postal 1-798, Queretaro 760001, Queretaro, Mexico TI - Effect of the impact ionization of deep traps on the field distribution in planar thin-film GaAs structures AB - The distribution of the electric field in planar GaAs structures made up of a thin film and semi-insulating compensated substrate is considered allowing for the impact ionization of deep traps in the substrate near the film-substrate interface. It is shown that there exists a critical film thickness below which the impact ionization of deep traps can make the film exhibit a long-length region of a uniform electric field exceeding the threshold of N-type negative differential mobility without recourse to special doping profiles. (C) 2001 American Institute of Physics MH - Mexico|Queretaro MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000166118900050 SO - Journal of Applied Physics 2001 ;89(1):327-331 3991 UI - 13331 AU - Prosen T AU - Seligman TH AU - Weidenmuller HA AD - Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana 61000, SloveniaUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyProsen, T, Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana 61000, Slovenia TI - Random matrix ensembles for semi-separable systems AB - Many models for chaotic systems consist of joining two integrable systems with incompatible constants of motion. The quantum counterparts of uch models have a propagator which factorizes into two integrable parts. Each part can be diagonalized. The two eigenvector bases are related by an orthogonal (or unitary) transformation. We construct a random matrix ensemble that mimics this situation and consists of a product of a diagonal, an orthogonal, another diagonal and the transposed orthogonal matrix. The diagonal phases are chosen at random and the orthogonal matrix from Haar's measure. We derive asymptotic results (dimension N --> infinity) using Wick contractions. A new approximation for the group integration yields the next order in 1/N. We obtain a finite correction to the circular orthogonal ensemble, important in the long-range part of spectral correlations MH - Germany MH - Mexico|Morelos MH - Slovenia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000169759800003 L2 - QUANTUM SURFACE; SECTION METHOD SO - Europhysics Letters 2001 ;55(1):12-18 3992 UI - 12845 AU - Proudlove G AU - Medina-Gonzalez R AU - Chumba-Segura L AU - Iliffe T AD - Manchester Museum, Dept Zool, Manchester M13 9PL, Lancs, EnglandUniv Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Ecol, Merida 97100, Yucatan, MexicoUniv Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Zool, Merida 97100, Yucatan, MexicoTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USAProudlove, G, Manchester Museum, Dept Zool, Manchester M13 9PL, Lancs, England TI - Threatened fishes of the world: Ogilbia pearsei (Hubbs, 1938) (Bythitidae) MH - United Kingdom MH - Mexico|Yucatan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000170993700016 SO - Environmental Biology of Fishes 2001 ;62(1-3):214-214 3993 UI - 12483 AU - Prutskij TA AU - Arencibia PD AU - Mintairov A AU - Merz J AU - Kosel TH AD - BUAP, Inst Ciencieas, Puebla 72000, MexicoUniv Notre Dame, Dept Elect Engn, Notre Dame, IN 46556, USACINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoPrutskij, TA, BUAP, Inst Ciencieas, Apdo Postal 1651, Puebla 72000, Mexico TI - Ordered versus disordered InGaP layers grown by liquid phase epitaxy AB - We make a comparative study of the optical and structural characteristics of two InxGa1-xP (x approximate to 0.5) films nearly lattice matched to GaAs, (here referred to as disordered type 1 sample (S1) and ordered type 2 sample (S2)). The films were grown by liquid phase epitaxy (LPE). Photoluminescence (PL) measurements were performed in a wide temperature and exciting power density range for different polarization of the emitted radiation along the [110] and [110] directions. Observations suggest that the InxGa1-xP layer in sample 1 is disordered, as commonly obtained in LPE growth, while in sample 2 at least a partially spontaneously ordered layer was obtained. Moreover, the energy position of the 20 K PL peak is close to the predicted band gap energy for the InGaP2 material ordered in the CuPt phase. [1] MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900020 L2 - PHOTOLUMINESCENCE SO - Modern Physics Letters B 2001 ;15(17-19):651-654 3994 UI - 12911 AU - Puerari I AU - Pfenniger D AD - Inst Nacl Astrofis Opt & Elect, Tonantzintla 72840, MexicoUniv Geneva, Observ Geneva, CH-1290 Sauverny, SwitzerlandPuerari, I, Inst Nacl Astrofis Opt & Elect, Calle Luis Enrique Erro 1, Tonantzintla 72840, Mexico TI - Formation of massive counter-rotating discs: An alternative scenario MH - Mexico|Puebla MH - Switzerland PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000170945400071 L2 - COUNTERROTATING STELLAR DISKS; SPIRAL GALAXIES SO - Astrophysics and Space Science 2001 ;276(2-4):909-914 3995 UI - 13297 AU - Puga DC AU - Galina HM AU - Perez-Gil RF AU - Sangines GL AU - Aguilera BA AU - Haenlein GFW AU - Barajas CR AU - Herrera HJG AD - UNAM, Fac Estudios Super Cuautitlan, Mexico City 28000, DF, MexicoUniv Colima, FMVZ, Posgrado Interinst Ciencias Pecuarias, Colima, MexicoInst Nacl Ciencias Biomed & Nutr Salvador Zubiran, Dept Anim Nutr, Mexico City, DF, MexicoUniv Autonoma Queretaro, LMVZ, FCN, Queretaro, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAUniv Autonoma Sinaloa, Fac Med Vet & Zootecnia, Sinaloa, MexicoColegio Postgrad, Dept Ganaderia, Montecillos Texcoco, MexicoGalina, HM, UNAM, Fac Estudios Super Cuautitlan, Ap 22, Mexico City 28000, DF, Mexico TI - Effect of a controlled-release urea supplementation on feed intake, digestibility, nitrogen balance and ruminal kinetics of sheep fed low quality tropical forage AB - Four ruminally cannulated crossbred sheep (25 +/- 3.3 kg BW) were divided into a 4 x 4 Latin square design to measure the effects of controlled-release urea supplement (CRUS). The basal diet consisted of 60% sugar cane tops (Saccharum officinarum), 30% full plant corn stubble (Zea mays), and 10% King grass (Pennisetum purpureum). Feed intake, digestibility, N balance and in situ ruminal kinetics were studied with four diets, D1 (control), D2, D3 and D4, which included the ratios of 100:0%, 90:10%, 80:20% or 70:30% of basal diet with CRUS. Results showed DMI differences (P < 0.05) for D4 (822 g per day) versus D1, D2 and D3 (580, 659 and 700 g per day, respectively). N retention increased (P < 0.05) for D4 (35.69 g per day) versus D1, D2 and D3 (9.29, 6.85 and 19.10 g per day, respectively). In vivo N digestibility was greater (P < 0.05) in D4 (79.63%) than in D1 (57.57%). In vivo digestibility of DM, OM, GE, cellulose and hemicellulose was similar among the four groups. Digestibility of cell walls in D4 was higher (P < 0.05) at 74.06% versus 67.78% in D1. In situ DM digestibility showed differences (P < 0.05) among all diets at 9, 12, 24 and 48 h of incubation. Potentially digestible fiber, 52.61%, was higher (P < 0.05) in D4 versus 31.00% in D1. Indigestible fiber, 35.29%, was lowest (P < 0.05) in D4 compared to 81.51% in D1, Digestion rate constant (kd) was different (P < 0.05) between the experimental diets and control. Passage constant (k(p)) was different (P < 0.05) between all diets (0.036/h in D4 to 0.081/h in D1). True digestibility was higher (P < 0.05) in D4 (44.64%) compared to D1 (19.55%), but in D2 (24.54%) and D3 (28.22%) there was no difference. Cellulose in situ digestion rate, the potentially digestible fiber, was higher (P < 0.05) in D3 (42.74%) as compared to D1 (22.50%). Time of disappearance of cellulose in D4 (14.79 h) was less (P < 0.05) than in D1 (24.03 h), however there was no difference between D1 and D2. Hemicellulose in situ digestion was different (P < 0.05) between D3 (45.48%) and D1 (23.61%). Digestion rate was higher (P < 0.05) between D3 and DI as compared to D1. Passage rate was different (P < 0.05) between D4 (0.033/h) and D1 (0.018/h). True digestibility in D3 (34.84%) and D4 (34.62%) was higher (P < 0.05) than that in D1 (20.06%) and D2 (25.86%), Half-time disappearance (t(1/2)) for hemicellulose was higher (P < 0.05) in D1 (62.36 h) than in D3 (28.00 h) and D4 (20.64 h). This study demonstrated that low quality forages at 70% of the total diet can be efficiently utilized by sheep when controlled-release urea supplementation is 30% of the feeding regime. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Colima MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - Mexico|Sinaloa MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000169724300002 L2 - tropical forages;sheep;urea controlled-release supplementation;digestibility;feed intake;in situ rumen kinetics;DIGEST CELLULOSE SO - Small Ruminant Research 2001 ;41(1):9-18 3996 UI - 14138 AU - Puga DC AU - Galina HM AU - Perez-Gil RF AU - Sangines GL AU - Aguilera BA AU - Haenlein GFW AD - Univ Colima, Posgrado Interinstituc Ciencias Pecuarias, FMVZ, CUIDA, Colima 28000, MexicoUNAM, Fac Estudios Super Cuautitlan, Mexico City, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Anim Nutr, Mexico City 14000, DF, MexicoUniv Autonomo Queretaro, FMVZ, Queretaro, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAGalina, HM, Univ Colima, Posgrado Interinstituc Ciencias Pecuarias, FMVZ, CUIDA, AP 22, Colima 28000, Mexico TI - Effect of a controlled-release urea supplement on rumen fermentation in sheep fed a diet of sugar cane tops (Saccharum officinarum), corn stubble (Zea mays) and King grass (Pennisetum purpureum) AB - Four cannulated sheep were used to study ruminal fermentation of a diet consisting of 60% sugar cane tops (Saccharum officinarum), 30% corn stubble (Zea mays), 10% King grass (Pennisetum purpureum) and 0% (control), 10, 20 or 30% controlled-release urea supplement (CRUS) (diets 1, 2, 3 and 4, respectively). Average ruminal pH did not differ among diets (P > 0.05), but during the first 6 h of sampling tended to be higher for CRUS diets. Ammonia concentrations were higher (P < 0.01) in all treatments over controls, indicating microbial protein generation. Acetic acid production (mM/1) decreased (P < 0.05), propionic acid increased (P < 0.05), while butyric acid production did not differ among CRUS diets and controls (P > 0.05). Total amounts of ruminal VFA were lowest (P < 0.01) in controls, while CRUS diets produced more of these energy sources. Supplementation of the high fiber diets with 10, 20 or 30% CRUS increasingly improved rumen fermentation, ammonia supply and VFA production. The results show that low quality forages (up to 70% DMI) can be used efficiently by sheep when conditions for luminal microorganism are improved with a controlled-release urea supplement. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000167474800009 L2 - sheep;rumen fermentation;urea supplementation;sugar cane tops;corn stubble;VOLATILE FATTY-ACIDS; DIGEST CELLULOSE; METABOLISM; ROUGHAGES; NITROGEN; INFUSION; GLUCOSE; INVITRO; FORAGE; SYSTEM SO - Small Ruminant Research 2001 ;39(3):269-276 3997 UI - 14060 AU - Puig LJ AU - Sanchez-Diaz JC AU - Villacampa M AU - Mendizabal E AU - Puig JE AU - Aguiar A AU - Katime I AD - Univ Guadalajara, Dept Ingn Quim, CUCEI, Guadalajara 44430, Jalisco, MexicoUniv Pais Vasco, Dept Quim Fis, Grp Nuevos Mat, E-48080 Bilbao, SpainPuig, JE, Univ Guadalajara, Dept Ingn Quim, CUCEI, Boul Marcelino Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Microstructured polyacrylamide hydrogels prepared via inverse microemulsion polymerization AB - The synthesis by a two-stage polymerization process of microstructured polyacrylamide hydrogels with large swelling capacity and improved mechanical properties is reported. First, crosslinked polyacrylamide particles of nanosize scale are made by inverse microemulsion polymerization. These particles are then dried and redispersed in an aqueous solution of acrylamide and polymerized in the presence of a crosslinking agent. The microstructured hydrogels, in contrast to transparent conventional polyacrylamide hydrogels, are translucid due to the presence of the dispersed particles. The swelling capacity of these hydrogels increases as the particle content increases and their Young and elastic moduli (at equilibrium swelling) diminish only slightly. Mechanical tests disclose that the microstructured hydrogels have larger Young moduli than conventional hydrogels with an identical degree of swelling. (C) 2001 Academic Press MH - Mexico|Jalisco MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000167650600012 L2 - ACRYLAMIDE; KINETICS; GELS SO - Journal of Colloid and Interface Science 2001 ;235(2):278-282 3998 UI - 12809 AU - Pulerwitz J AU - Izazola-Licea JA AU - Gortmaker SL AD - Populat Council, Horizons Project PATH, Washington, DC 20008, USAFdn Mexicana Salud, Reg AIDS Initiat LAC SIDALAC, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USAPulerwitz, J, Populat Council, Horizons Project PATH, 4301 Connecticut Ave NW,Suite 280, Washington, DC 20008 USA TI - Extrarelational sex among Mexican men and their partners' risk of HIV and other sexually transmitted diseases AB - Objectives, This study explored the risk of HIV and other sexually transmitted diseases (STDs) among married and cohabiting women in Mexico City, Mexico, derived from their partners' sexual behaviors. Methods. Results were derived from the first population-based household survey in Mexico that investigated male sexual behavior, Analyses were restricted to sexually active married or cohabiting men (n = 3990). Results. Fifteen percent of the men reported extrarelational sex during the past year, 9% reported condom use during last intercourse, and 80% perceived no HIV risk. Most secondary partners were coworkers, mistresses, or friends. Conclusions. Targeted HIV and STD prevention efforts appear necessary because a substantial number of women may be at risk MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER PUBLIC HEALTH ASSOC INC RP - NOT IN FILE U3 - TC 17 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0090-0036 UR - ISI:000171221800034 L2 - BEHAVIOR; POWER; PREVENTION; GENDER; WOMEN; AIDS SO - American Journal of Public Health 2001 ;91(10):1650-1652 3999 UI - 14129 AU - Pustilnik SA AU - Brinks E AU - Thuan TX AU - Lipovetsky VA AU - Izotov YI AD - Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachai Circas, RussiaIsaac Newton Inst Chile, SAO Branch, Nizhnii Arkhyz 369167, RussiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv Virginia, Dept Astron, Charlottesville, VA 22903, USANatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, UkrainePustilnik, SA, Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachai Circas, Russia TI - VLA HI line observations of the extremely metal-poor blue compact dwarf galaxy SBS 0335-052 AB - We present the results of H I mapping with the NRAO(2) VLA of one of the most metal-deficient blue compact dwarf (BCD) galaxies known, SBS 0335-052, with an oxygen abundance only 1/40 that of the Sun. We study the structure and dynamics of the neutral gas in this chemically young object with a spatial resolution of 20.5" x 15" (similar to5.4 x 3.9 kpc at an assumed distance of 54.3 Mpc), a sensitivity at the 2 sigma detection level of similar to2.0 K or 7.5 x 10(19) cm(-2) and a velocity resolution of 21.2 km s(-1). We detected a large H I complex associated with this object having an overall size of about 66 by 22 kpc and elongated in the east-west direction. There are two prominent, slightly resolved peaks visible in the integrated H I map, separated in the east-west direction by 22 kpc (84 "). The eastern peak is nearly coincident with the position of the optical galaxy SBS 0335-052. The western peak is about a factor of 1.3 brighter in the H I line and is identified with a faint blue compact dwarf galaxy, SBS 0335-052W, with m(B) = 19.4, and a metallicity close to the lowest values known for BCDs, about 1/50 that of the Sun. The radial velocities of both systems are similar, suggesting that the two BCDs, SBS 0335-052 and SBS 0335-052W, constitute a pair of dwarf galaxies embedded in a common H I envelope. Alternatively, the BCDs may be the nuclei of two distinct interacting primordial H I clouds. The estimated total dynamical mass, assuming the BCDs form a bound system, is larger than similar to6 x 10(9) M., compared with a total gaseous mass M-gas = 2.1 x 10(9) m. and a total stellar mass M-star less than or similar to 10(8) M. Hence, the mass of the SBS 0335-052 system is dominated by dark matter. Because of the disturbed H I velocity field and the presence of what might be tidal tails at either end of the system, we favor the hypothesis of tidal triggering of the star formation in this system. It can be due to either the nearby giant galaxy NGC 1376 or the mutual gravitational interaction of the two H I clouds MH - Mexico|Guanajuato MH - Russia MH - Ukraine MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 37 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000167582800015 L2 - galaxies : compact;galaxies : evolution;galaxies : individual (SBS 0335-052) galaxies : ISM;galaxies : kinematics and dynamics;ISM : HI;SURFACE BRIGHTNESS GALAXIES; HEAVY-ELEMENT ABUNDANCES; STAR-FORMATION; HELIUM ABUNDANCE; SPIRAL GALAXIES; GAS-DYNAMICS; MERGING GALAXIES; PRIMORDIAL GAS; DISK GALAXIES; NEUTRAL GAS SO - Astronomical Journal 2001 ;121(3):1413-1424 4000 UI - 12815 AU - Puttmann TP AU - Searle C AD - Ruhr Univ Bochum, Fak Math, D-44780 Bochum, GermanyUNAM, Unidad Cuernavaca, Inst Matemat, Cuernavaca 62251, Morelos, MexicoPuttmann, TP, Ruhr Univ Bochum, Fak Math, D-44780 Bochum, Germany TI - The Hopf conjecture for manifolds with low cohomogeneity or high symmetry rank AB - We prove that the Euler characteristic of an even-dimensional compact manifold with positive (nonnegative) sectional curvature is positive (nonnegative) provided that the manifold admits an isometric action of a compact Lie group G with principal isotropy group H and cohomogeneity k such that k - (rank G - rank H) less than or equal to 5. Moreover, we prove that the Euler characteristic of a compact Riemannian manifold M4l+4 or M4l+2 with positive sectional curvature is positive if M admits an effective isometric action of a torus T-l, i.e., if the symmetry rank of M is greater than or equal to l MH - Germany MH - Mexico|Morelos PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000171005600022 SO - Proceedings of the American Mathematical Society 2001 ;130(1):163-166 4001 UI - 12985 AU - Quackenbush SL AU - Casey RN AU - Murcek RJ AU - Paul TA AU - Work TM AU - Limpus CJ AU - Chaves A AU - duToit L AU - Perez JV AU - Aguirre AA AU - Spraker TR AU - Horrocks JA AU - Vermeer LA AU - Balazs GH AU - Casey JV AD - Cornell Univ, Coll Vet Med, Dept Microbiol & Immunol, Vet Med Ctr C5153, Ithaca, NY 14853, USAUniv Kansas, Dept Mol Biosci, Lawrence, KS 66045, USAUS Geol Survey, Natl Wildlife Hlth Ctr, Honolulu Field Stn, Honolulu, HI 96850, USAQueensland Parks & Wildlife Serv, Brisbane, Qld 4002, AustraliaInst Nacl Pesca, Ctr Mexicano Tortuga, Puerto Angel, Oaxaca National, MexicoWildlife Trust, Prospect Pk, PA 19076, USAColorado State Univ, State Vet Diagnost Lab, Ft Collins, CO 80523, USAUniv W Indies, Dept Biol & Chem Sci, Cave Hill, St Michael, BarbadosBellairs Res Inst, Barbados Sea Turtle Project, St James, BarbadosNOAA, Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Honolulu Lab, Honolulu, HI 96822, USACasey, JV, Cornell Univ, Coll Vet Med, Dept Microbiol & Immunol, Vet Med Ctr C5153, Ithaca, NY 14853 USA TI - Quantitative analysis of herpesvirus sequences from normal tissue and fibropapillomas of marine turtles with real-time PCR AB - Quantitative real-time PCR has been used to measure fibropapilloma-associated turtle herpesvirus (FPTHV) pol DNA loads in fibropapillomas, fibromas, and uninvolved tissues of green, loggerhead, and olive ridley turtles from Hawaii, Florida, Costa Rica, Australia, Mexico, and the West Indies. The viral DNA loads from tumors obtained from terminal animals were relatively homogenous (range 2-20 copies/cell), whereas DNA copy numbers from biopsied tumors and skin of otherwise healthy turtles displayed a wide variation (range 0.001-170 copies/cell) and may reflect the stage of tumor development. FPTHV DNA loads in tumors were 2.5-4.5 logs higher than in uninvolved skin from the same animal regardless of geographic location, further implying a role for FPTHV in the etiology of fibropapillomatosis. Although FPTHV pol sequences amplified from tumors are highly related to each other, single signature amino acid substitutions distinguish the Australia/Hawaii, Mexico/Costa Rica, and Florida/Caribbean groups. (C) 2001 Academic Press MH - Australia MH - Barbados MH - Mexico|Oaxaca MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 13 U4 - Virology U5 - J;Article AV - English IS - 0042-6822 UR - ISI:000170606600012 L2 - herpesvirus;fibropapilloma;real-time PCR;marine turtles;GREEN TURTLE; CHELONIA-MYDAS; CUTANEOUS FIBROPAPILLOMAS SO - Virology 2001 ;287(1):105-111 4002 UI - 14175 AU - Querejeta E AU - Delgado A AU - Valdiosera R AU - Erlij D AU - Aceves J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoSuny Downstate Med Ctr, Dept Physiol, Brooklyn, NY 11203, USAAceves, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Apartado Postal 14140, Mexico City 07000, DF, Mexico TI - Intrapallidal D-2 dopamine receptors control globus pallidus neuron activity in the rat AB - Because activation of D-2 dopamine receptors inhibits gamma -aminobutyric acid (GABA) release from intrapallidal nerve terminals, we measured the effects of modifiers of dopamine D-2 receptors on the firing rate of single neurons in the globus pallidus (GP) of the anesthetized rat. The predominant effect of intrapallidal administration of the selective D-2 agonist quinpirole was an increase in the rate of spontaneous firing while the D-2 blocker sulpiride caused a decrease. The spontaneous firing of GP neurons is inhibited by stimulation of the GABAergic striatopallidal projection. We therefore measured the effects of modifiers of D-2 receptors on striatal inhibition of GP neurons and found that intrapallidal quinpirole blocked the inhibitory effects of striatal stimulation while sulpiride enhanced them. These experiments show that both the spontaneous rate of firing of pallidal neurons and its modification by striatopallidal inputs is controlled by intrapallidal dopamine D-2 receptors. In addition, taken together with other findings in the literature, our results suggest that activation of dopamine D-2 receptors within the globus pallidus leads to inhibition of GABA release from presynaptic terminals. (C) 2001 Published by Elsevier Science Ireland Ltd MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 18 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000167287800005 L2 - basal ganglia;dopamine receptors;gamma-aminobutyric acid release and transmission;quinpirole;striatopallidal transmission;sulpiride;BASAL GANGLIA; GABA RELEASE; APOMORPHINE; ANESTHESIA; INHIBITION; BINDING; BRAIN SO - Neuroscience Letters 2001 ;300(2):79-82 4003 UI - 12352 AU - Quesada M AU - Fuchs EJ AU - Lobo JA AD - Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoUniv Costa Rica, Escuela Biol, San Jose, Costa RicaQuesada, M, Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, San Patricio 48980, Jalisco, Mexico TI - Pollen load size, reproductive success, and progeny kinship of naturally pollinated flowers of the tropical dry forest tree Pachira quinata (Bombacaceae) AB - Several studies have demonstrated, using controlled pollinations, that the number and identity of pollen grains deposited onto a flower's stigma affect the reproductive success of plants. However, few studies have shown this relationship under conditions of natural pollination. Using the tropical dry forest tree Pachira quinata, we evaluated the relationship between the number of microgametophytes per pistil and the number of sires with respect to the production of fruits and seeds in a natural population of Pachira quinata. Our study demonstrates that fruit and seed production are directly related to the number of microgametophytes per pistil in natural populations of P, quinata, Only 6% of the marked flowers developed into mature fruits and 10% of the marked flowers initiated fruits but later aborted them, A mean of 23 pollen grains were required to produce a seed. Flowers with > 400 pollen grains on the stigma always developed into mature fruits, whereas flowers that received < 200 grains never matured fruits. Half of the pollen grains transferred to a flower stigma germinated and developed pollen tubes to the base of the style. The number of pollen grains on a stigma explained 34% of the variation in seed number per fruit. and the number of seeds produced per fruit is positively correlated with the size of the seeds. The population of P. quinata studied is predominantly outcrossing, and seeds within fruits are sired by one or a few donors. The total seed crop within trees was sired by three to five donors. Our study examined the implications of the variation in size of microgametophyte loads per pistil with respect to the breeding system and the paternity of progeny under natural conditions. The competitive ability of pollen and pollen tube attrition are important factors regulating fruit production in P. quinata MH - Costa Rica MH - Mexico|Jalisco PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 17 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000172277500017 L2 - Bombacaceae;Pachira quinata;paternity;pollen competition;pollen-pistil interactions;self-incompatibility;tropical dry forest;CUCURBITA-PEPO; SELF-INCOMPATIBILITY; SEED SET; INBREEDING DEPRESSION; CAMPSIS-RADICANS; FRUIT MATURATION; FLORAL BIOLOGY; COMPETITION; ABORTION; PATTERNS SO - American Journal of Botany 2001 ;88(11):2113-2118 4004 UI - 14018 AU - Quintanar-Guerrero D AU - Villalobos-Garcia R AU - varez-Colin E AU - Cornejo-Bravo JM AD - Univ Autonoma Baja California, Fac Ciencias Quim & Ingn, San Diego, CA 92154, USAUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Div Estudios Posgrado Tecnol Farmaceut, Cuautitlan Izcalli 54750, Estado Mexico, MexicoCornejo-Bravo, JM, Univ Autonoma Baja California, Fac Ciencias Quim & Ingn, PMB 121,2498 Roll Dr, San Diego, CA 92154 USA TI - In vitro evaluation of the bioadhesive properties of hydrophobic polybasic gels containing N,N-dimethylaminoethyl methacrylate-co-methyl methacrylate AB - The bioadhesive properties of the hydrophobic, basic polyelectrolyte hydrogel disks containing crosslinked N,N-dimethylaminoethyl methacrylate-co-methyl methacrylate 30/70 mol% were evaluated in vitro using gastric(pH 1.2), sublingual (pH 6.5), vaginal (pH 4.0) and intestinal (pH 7.5) pig's mucosas. Adhesive strength was measured using a modified Du Nouy tensiometer by measuring the force of detachment between a gel disk and the respective mucosa. The effect of crosslinker content in the gel was evaluated. It was found an increase in the adhesive strength with the increase of crosslinker content in the pH range of 4.0-7.5. For the evaluation at pH 1.2 (gastric mucosa) the opposite behavior was observed. The results indicate that initial bioadhesive contact may be the result of surface energy effects and/or electrostatic interactions of oppositely charged groups between mucin and the gel. In some cases, mucus dehydration may also be involved. When the gel is swollen, chain interpenetration also plays a roll in the bioadhesive interaction. The gels presented bioadhesive forces in gastric and vaginal mucosas (acidic medium), similar to the adhesive forces of well-known bioadhesives such as hydroxymethylcellulose and sodium alginate to the intestinal mucosa. The results indicate that hydrophobic polybasic gels present bioadhesive properties that make them suitable for site specific, pH controlled drug delivery, (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Estado De Mexico PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 13 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0142-9612 UR - ISI:000167898900010 L2 - bioadhesion;polyelectrolyte;hydrogels;hydrophobic;polybasic gel;SURFACE-ENERGY ANALYSIS; DRUG-DELIVERY; MUCOADHESIVE PROPERTIES; INTESTINAL-MUCOSA; SYSTEMS; RELEASE SO - Biomaterials 2001 ;22(9):957-961 4005 UI - 13476 AU - Quintanar-Stephano A AU - Fernandez LM AU - Quintanar JL AU - Kovacs K AD - Univ Autonoma Aguascalientes, Dept Fisiol & Farmacol, Ctr Ciencias Basicas, Aguascalientes 20100, Ags, MexicoSt Michaels Hosp, Dept Lab Med, Dept Morfol, Ctr Ciencias Basicas,UAA, Toronto, ON M5B 1W8, CanadaQuintanar-Stephano, A, Univ Autonoma Aguascalientes, Dept Fisiol & Farmacol, Ctr Ciencias Basicas, Avenida Univ 940, Aguascalientes 20100, Ags, Mexico TI - Cysts in the rat adenohypophysis: Incidence and histology AB - The incidence and histology of cysts in the adenohypophysis of adult ma le Wistar rats a re reported. Of sixty pituitaries studied 13 of them (21.6%) presented a single cyst located in the pars distalis. The cysts varied in shape and size and were usually multilocular. Two of them were connected with the subdural space at the ventral surface of the adenohypophysis. Histology demonstrated that the cysts were filled with mucinous material and foamy macrophages and were lined by flat and cuboidal ciliated and nonciliated epithelial cells, goblet cells as well as several adenohypophysial endocrine cells such as somatotrophs, thyrotrophs, and gonadotrophs. The ciliated cells were the most numerous. Histologic and immunohistochemical studies of the uninvolved areas of the adenohypophysis showed no abnormalities and the weights and histology of the adenohypophyses and peripheral endocrine glands were within normal range, suggesting that the cysts did not impair the adenohypophysial endocrine activity. Although the morphogenesis of the cysts remained obscure, the histological and immunohistochemical findings support the hypothesis that during embryonic development, the future cysts coming from the pharyngeal epithelium is fused with the stomodeum before or during the formation of the Rathke's pouch MH - Canada MH - Mexico|Aguascalientes PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Endocrinology & Metabolism;Pathology U5 - J;Article AV - English IS - 1046-3976 UR - ISI:000169376600008 L2 - pituitary cysts;cell types;immunohistochemistry;rats;L-TRIIODOTHYRONINE TREATMENT; ANTERIOR-PITUITARY GLAND; HYPOTHYROID RATS; GROWTH-HORMONE; CELL TYPE; SOMATOTROPHS; THYROTROPHS; TRANSDIFFERENTIATION; DIFFERENTIATION; ADRENALECTOMY SO - Endocrine Pathology 2001 ;12(1):63-71 4006 UI - 12934 AU - Quintanilla-Licea R AU - Teuber HJ AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas G 66400, NL, MexicoUniv Frankfurt, Inst Organ Chem, D-60439 Frankfurt, GermanyQuintanilla-Licea, R, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Cd Univ, San Nicolas G 66400, NL, Mexico TI - Review on reactions of acetylacetaldehyde with aromatic and biogenic amines and indoles-synthesis of heterocycles via hydroxymethylene ketones AB - In 1960 Teuber et al. started with the study of the reactions of several derivatives of acetylacetaldehyde with aromatic and biogenic amines (dopamine and tryptamine), as well as indole compounds. Teuber's scientific work resulted in a series of heterocyclic skeletons that are related to alkaloids such as strychnine, yohimbine, ajmalicine and emetine as well as to some analogues of bis-indole alkaloids. We review Teuber's research results as well as reactions from other authors working in this field obtained within the last 40 years (1960-2000) MH - Germany MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Organic U5 - J;Review AV - English IS - 0385-5414 UR - ISI:000170864800016 L2 - DIELS-ALDER REACTIONS; ENANTIOSELECTIVE SYNTHESIS; ASYMMETRIC-SYNTHESIS; BISINDOLE ALKALOIDS; 1-AMINO-3-SILOXY-1,3-BUTADIENES; (-)-ALPHA-ELEMENE; BIOSYNTHESIS; DERIVATIVES; EFFICIENT; ANALOGS SO - Heterocycles 2001 ;55(7):1365-+ 4007 UI - 12307 AU - Quintanilla-Martinez L AU - Kremer M AU - Keller G AU - Nathrath M AU - Gamboa-Dominguez A AU - Meneses A AU - Luna-Contreras L AU - Cabras A AU - Hoefler H AU - Mohar A AU - Fend F AD - Inst Pathol, GSF, Natl Res Ctr Environm & Hlth, Neuherberg, GermanyTech Univ, Munich, GermanyInst Nacl Nutr, Mexico City, DF, MexicoInst Nacl Cancerol, Mexico City, DF, MexicoQuintanilla-Martinez, L, Inst Pathol, GSF, Res Ctr Environm & Hlth, Ingolstadter Landstr 1, D-85764 Oberschleissheim, Germany TI - p53 mutations in nasal natural killer/T-cell lymphoma from Mexico - Association with large cell morphology and advanced disease AB - Nasal NK/T-cell lymphoma is a unique form of lymphoma highly associated with Epstein-Barr virus, and with a characteristic geographic distribution. Recently, we showed that p53 is overexpressed in a high percentage of nasal NK/T-cell lymphomas. The aim of this study was to analyze the status of the p53 gene, and correlate it with the expression of p53 protein and its downstream target, the cyclin-dependent kinase inhibitor p21, in a series of 25 cases of. well-characterized nasal NK/T-cell lymphoma from Mexico. The highly conserved exons; 5 to 8 of the p53 gene were amplified by polymerase chain reaction and screened for mutations by denaturing high-pressure liquid chromatography. Abnormal polymerase chain reaction products detected by denaturing high-pressure liquid chromatography and additional selected cases were sequenced. in addition, the incidence of loss of heterozygosity at the p53 locus was analyzed in 12 cases. Of the 25 patients, 17 were male and 8 female (M:F ratio, 2.1:1), with a median age of 43 years (range, 21 to 93 years). Morphologically, most of the cases were composed of a mixture of medium-sized cells and large transformed cells (21 cases), and four cases were composed exclusively of large transformed cells. Three different groups determined by p53 gene status and expression of p53 protein were identified: group I was p53 +/p53 mutated (five cases, all with p53 missense mutations). Morphologically, three of the five cases were composed of large cells. All five cases revealed overexpression of p53 in the majority of the tumor ce-Us with a mean of 86%. Unexpectedly, three of these cases also showed over-expression of p21. Four of the five patients presented with clinical stage IVB and died with disease. Group 2 was p53+/p53 wild-type (10 cases). Histologically, nine cases were of the mixed type, and one of the large cell type. The percentage of p53 overexpressing cells was lower than in the previous group with a mean of 23%. p21. was positive in 7 of the 10 cases. Six patients in this group presented with clinical stages I to II and four patients with advanced disease (stage In and IV). Five patients are alive 12 to 120 months later (mean, 24 months), three with no evidence of disease. Group 3 was p53-/p53 wild-type (10 cases). All cases showed mixed cell morphology. p21 was positive in 5 of 10 cases. Four patients presented with clinical stage I to II and six patients with advanced disease. Four patients are alive with no evidence of disease 9 to 60 months later (mean, 10 months). Overall, p53 mutations were present in 24% (5 of 2 1) of the evaluable cases, all of them overexpressing p53 in the majority of tumor cells. Cases with p53 mutations were associated with large cell morphology (P = 0.0162) and presented more often with advanced stage disease. Loss of heterozygosity at chromosome 17p was found only in 2 of the 12 (17%) cases investigated, both cases showed p53 mutations of the remaining allele. p21 overexpression (60% of cases) is frequent in nasal NK/T-cell lymphoma and seems to be independent of p53 gene status. The overexpression of p53 and p21, independent of p53 mutations, although as yet not clear, might be the result of Epstein-Barr virus infection, and warrants further investigation MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC INVESTIGATIVE PATHOLOGY, INC RP - NOT IN FILE U3 - TC 16 U4 - Pathology U5 - J;Article AV - English IS - 0002-9440 UR - ISI:000172457400015 L2 - EPSTEIN-BARR-VIRUS; NON-HODGKINS-LYMPHOMA; MALIGNANT-LYMPHOMAS; PROGNOSTIC FACTORS; PARANASAL SINUSES; GENE-MUTATIONS; HONG-KONG; PROTEIN; EXPRESSION; IMMUNOPHENOTYPE SO - American Journal of Pathology 2001 ;159(6):2095-2105 4008 UI - 14222 AU - Quintanilla-Martinez L AU - Kremer M AU - Keller G AU - Meneses A AU - Gamboa-Dominguez A AU - Cabras AD AU - Mohar A AU - Fend F AD - Tech Univ Munich, GSF, Inst Pathol, D-8000 Munich, GermanyInst Nacl Cancerol, Mexico City, DF, MexicoInst Nacl Nutr, Mexico City, DF, Mexico TI - Mutational analysis of p53 in nasal NK/T-cell lymphoma from Mexico MH - Germany MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000166622401047 SO - Modern Pathology 2001 ;14(1):177A-177A 4009 UI - 14270 AU - Quintanilla-Martinez L AU - Kremer M AU - Keller G AU - Meneses A AU - Gamboa-Dominguez A AU - Cabras AD AU - Mohar A AU - Fend F AD - GSF, Inst Pathol, Munich, GermanyTech Univ Munich, Inst Pathol, D-8000 Munich, GermanyInst Nacl Cancerol, Mexico City, DF, MexicoInst Nacl Nutr, Mexico City, DF, Mexico TI - Mutational analysis of p53 in nasal NK/T-cell lymphoma from Mexico MH - Germany MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000166634901051 SO - Laboratory Investigation 2001 ;81(1):177A-177A 4010 UI - 13422 AU - Quiroga-Garza HM AU - Picchioni GA AU - Remmenga MD AD - INIFAP, Torreon 27000, Coahuila, MexicoNew Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USANew Mexico State Univ, Dept Econ & Int Business, Las Cruces, NM 88003, USAQuiroga-Garza, HM, INIFAP, Apartado Postal 247, Torreon 27000, Coahuila, Mexico TI - Bermudagrass fertilized with slow-release nitrogen sources. I. Nitrogen uptake and potential leaching losses AB - With the objectives of analyzing N recovery and potential N losses in the warm-season hybrid bermudagrass 'Tifgreen' [Cynodon dac tylon (L.) Pers. X C. transvaalensis Burtt-Davy], two greenhouse studies were conducted. Plugs were planted in PVC cylinders fined with a modified sandy growing medium. Urea (URE), sulfur coated urea (SCU), and Hydroform (HYD) (Hydro Agri San Francisco, Redwood City, CA) were broadcast at rates of 100 and 200 kg N ha(-1) every 20 and 40 d. The grass was clipped three times every 10 d and analyzed for N concentration and N yield. In addition, leachates were analyzed for NO3-N. Use of the least soluble source, HYD, resulted in the lowest average clipping N concentration and N yield, as compared with SCU and URE. Clipping N concentration and N yield showed a cyclic pattern through time, particularly under long-day (> 12 h) conditions. When the photoperiod decreased below 12 h, leachate NO3-N concentration exceeded the standard limit for drinking water (10 mg L-1) by 10 to 19 times with the high SCU and URE application rate and frequency. However, leaching N losses represented a minimal fraction (<1%) of the total applied N. More applied N was recovered in plant tissues using SCU and URE (89.5%) than using HYD (64.1%), with more than 52% of applied N accumulating in clippings. Highly insoluble N sources such as HYD decrease N leaching losses but may limit bermudagrass growth and quality. Risks of NO3-N losses in bermudagrass can be avoided by proper fertilization and irrigation programs, even when a highly soluble N source is used MH - Mexico|Coahuila MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0047-2425 UR - ISI:000169455400018 L2 - KENTUCKY BLUEGRASS TURF; NITRATE; TURFGRASS; FATE SO - Journal of Environmental Quality 2001 ;30(2):440-448 4011 UI - 12133 AU - Quiroz-Mercado H AU - Sanchez-Buenfil E AU - Guerrero-Naranjo JL AU - Ochoa-Contreras D AU - Ruiz-Cruz M AU - Marcellino G AU - D'Amico DJ AD - Hosp Dr Luis Sanchez Bulnes, Retina Serv, APEC, Mexico City 04200, DF, MexicoCoherent Med, Palo Alto, CA, USAHarvard Univ, Massachusetts Eye & Ear Infirm, Sch Med, Retina Dept, Boston, MA, USAHarvard Univ, Sch Med, Dept Ophthalmol, Boston, MA, USAQuiroz-Mercado, H, Hosp Dr Luis Sanchez Bulnes, Retina Serv, APEC, Vicente Garcia Torres 46, Mexico City 04200, DF, Mexico TI - Successful erbium: YAG laser-induced chorioretinal venous anastomosis for the management of ischemic central retinal vein occlusion - A report of two cases AB - Background: Central retinal vein occlusion (CRVO) is a disorder with potentially blinding complications, particularly when associated with retinal ischemia. There is no reliable treatment for ischemic CRVO. Methods: We developed a new approach for ischemic cases of CRVO consisting of vitrectomy, posterior hyaloid detachment, and four erbium:YAG laser-induced chorioretinal anastomoses, one in each quadrant. Results: We report two cases of ischemic CRVO treated with this approach, with initial visual acuity of count fingers at 30 cm and hand movements respectively. After the surgery, there was resolution of hemorrhages and macular edema and visual improvement to 20/400 in the first case and to 20/180 in the second case. In both cases, there was successful creation of chorioretinal anastomoses. and there was no anterior segment neovascularization or other complications related to the surgery. Conclusion: This treatment shows promise in the management of the ischemic cases of CRVO, and further evaluation is justified MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Ophthalmology U5 - J;Article AV - English IS - 0721-832X UR - ISI:000172797100010 L2 - CYSTOID MACULAR EDEMA; MEMBRANE SO - Graefes Archive for Clinical and Experimental Ophthalmology 2001 ;239(11):872-875 4012 UI - 12365 AU - Quiroz-Mercado H AU - Yeshurun K AU - Sanchez-Buefil E AU - Guerrero-Naranjo JL AU - Luloh P AU - Mercellino GR AD - Hosp Dr Luis Sanchez Bulnes, IAP, Asociac Evitar Ceguera Mexico, Mexico City 04030, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoTel Aviv Univ, Sackler Fac Med, Edith Wolfson Med Ctr, IL-69978 Tel Aviv, IsraelInsight Instruments Inc, Sanford, FL, USACoherent Med, Palo Alto, CA, USAQuiroz-Mercado, H, Hosp Dr Luis Sanchez Bulnes, IAP, Asociac Evitar Ceguera Mexico, Vencente Garcia Torres 46,Col San Lucas, Mexico City 04030, DF, Mexico TI - Subretinal, viscoelastic-assisted, endoscope-guided photothermal ablation of choroidal neovascular membranes by erbium : YAG laser AB - Background and objective: The efficacy of endoscope-guided erbium:Yag laser, assisted by viscoelastic macular detachment, in subretinal ablation of choroidal neovascular membranes (Cnvs) Is evaluated. Patients and methods: A high-repetition, midinfrared erbium:Yag laser was used subretinally to ablate cnvs in 2 patients. Ablation followed pars plana vitrectomy and macular retinal detachment using a viscoelastic substance, and was guided by a high resolution endoscope. Results: Visual acuity improved from 6/90 to 6/20, six months after treatment in 1 patient, and from finger counting from 1 meter to 6/30, three months after treatment in the other. The membranes showed no angiographic signs of activity postoperatively. However, a zone of stippled hyperfluorescence appeared in both patients, corresponding with the macular detachment area. This gradually diminished in size in both patients. Conclusions: The surgical procedure was found effective in our preliminary research. The use of viscoelastic substance and endoscope is felt to contribute to the favorable outcome. The cause and significance of the retinal pigment epithelium damage are yet to be determined MH - Israel MH - Mexico|Distrito Federal MH - USA PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology;Surgery U5 - J;Article AV - English IS - 0022-023X UR - ISI:000172142900002 L2 - VITREORETINAL SURGERY; CLINICAL-EXPERIENCE; RABBIT; RETINA; ENDOPHOTOCOAGULATION; PHOTOCOAGULATION; HISTOPATHOLOGY; LESIONS; KRYPTON SO - Ophthalmic Surgery and Lasers 2001 ;32(6):456-463 4013 UI - 13223 AU - Quiroz-Mercado H AU - Guerrero-Naranjo J AU - Yeshurum I AU - Rodriguez A AU - Perez-Reguera A AU - Koch FE AD - Natl Autonomous Univ Mexico, Retina Serv, APEC, Mexico City, DF, MexicoUniv Frankfurt, D-6000 Frankfurt, Germany TI - Comparative evaluation of different subretinal substances for submacular surgery MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 1 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392102283 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S429-S429 4014 UI - 13445 AU - Quiroz Y AU - Pons H AU - Gordon KL AU - Rincon J AU - Chavez M AU - Parra G AU - Herrera-Acosta J AU - Gomez-Garre D AU - Largo R AU - Egido J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - Univ Zulia, Univ Hosp, Renal Serv, Maracaibo 4001A, VenezuelaUniv Zulia, Univ Hosp, Dept Immunobiol INBIOMED, Maracaibo 4001A, VenezuelaInst Nacl Cardiol, Dept Nephrol, Mexico City 4080, DF, MexicoUniv Autonoma Madrid, Fdn Jimenez Diaz, Lab Nefrol, Madrid 28040, SpainRodriguez-Iturbe, B, Apartado Postal 1430, Maracaibo 4001A, Venezuela TI - Mycophenolate mofetil prevents salt-sensitive hypertension resulting from nitric oxide synthesis inhibition AB - Recent studies have suggested that subtle microvascular and tubulointerstitial injury in the kidney can cause salt-sensitive hypertension. To test this hypothesis, we determined whether the mild renal disease induced by transient blockade of nitric oxide (NO) synthesis would result in salt-sensitive hypertension and whether prevention of the renal injury by coadministration of the immunosuppressive agent mycophenolate mofetil (MMF) would block the development of salt sensitivity. N-omega-nitro-L-arginine-methyl ester (L-NAME; 70 mg/100 ml in the drinking water) was administered for 3 wk to rats with or without MMF (30 mg.kg(-1).day(-1) by gastric gavage), followed by a 1-wk "washout" period in which the MMF was continued, which was followed in turn by placement on a high-salt (4% NaCl) diet for an additional 4 wk. Renal histology was examined at 3 and 8 wk, and blood pressure was measured serially. L-NAME treatment resulted in acute hypertension and the development of mild renal injury. During the washout period, blood pressure returned to normal, only to return to the hypertensive range on exposure of the animals to a high-salt diet. MMF treatment prevented the development of hypertension in response to a high-salt diet. This correlated with the ability of MMF to inhibit specific aspects of the renal injury, including the development of segmental glomerulosclerosis, the infiltration of T cells and ANG II-positive cells, and the thickening of afferent arterioles MH - Mexico|Distrito Federal MH - Spain MH - Venezuela PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 68 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000169502000004 L2 - lymphocytes;nitric oxide inhibition;angiotensin II-positive cells;CELL-ADHESION MOLECULES; ANGIOTENSIN-II; GLOMERULAR DAMAGE; CONVERTING ENZYME; CHRONIC BLOCKADE; TYPE-1 RECEPTOR; MESSENGER-RNA; RATS; EXPRESSION; PATHOGENESIS SO - American Journal of Physiology-Renal Physiology 2001 ;281(1):F38-F47 4015 UI - 12878 AU - Rabinovich V AU - Schulze BW AU - Tarkhanov N AD - IPN, ESIME, Dept Telecomunicac, Mexico City, DF, MexicoUniv Potsdam, Inst Math, D-14415 Potsdam, GermanyRabinovich, V, IPN, ESIME, Dept Telecomunicac, Av IPN S-N Ed 1, Mexico City, DF, Mexico TI - Boundary value problems in domains with non Lipschitz boundary AB - We consider boundary value problems in a domains with non Lipschitz boundary. More exactly we consider domains with intersecting cuspidal edges on the boundary. The boundary of domains oscillates near a singular manifold. Conditions for the operator of boundary value problem to be Fredholm in weighted Sobolev spaces are given MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0362-546X UR - ISI:000170889100040 L2 - boundary value problems;singular domains SO - Nonlinear Analysis-Theory Methods & Applications 2001 ;47(3):1881-1891 4016 UI - 12045 AU - Rabinovich VS AD - Rostov State Univ, Rostov Na Donu 344104, RussiaMexico Natl Polytech Inst, Dept Telecommun, Mexico City 07738, DF, MexicoRabinovich, VS, Rostov State Univ, Pr Stachki 194, Rostov Na Donu 344104, Russia TI - An abstract scheme of the limit operator method and its applications MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1064-5624 UR - ISI:000173193600011 SO - Doklady Mathematics 2001 ;64(3):333-336 4017 UI - 13327 AU - Rabinovich VS AU - Roch S AU - Silbermann B AD - Rostov State Univ, Dept Mech & Math, Rostov On Don 344104, RussiaInst Politecn Nacl, ESIME, Zacatenco SEPI, Mexico City 07738, DF, MexicoTech Univ Darmstadt, Fachbereich Math, D-64289 Darmstadt, GermanyTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyRabinovich, VS, Rostov State Univ, Dept Mech & Math, Ul Sorge 5, Rostov On Don 344104, Russia TI - Band-dominated operators with operator-valued coefficients, their Fredholm properties and finite sections AB - The central theme of the present paper are band and band-dominated operators, i.e. norm limits of band operators. In the first part, we generalize the results from [24] and [25] concerning the Fredholm properties of band-dominated operators and the applicability of the finite section method go the case of operators with operator-valued coefficients. We characterize these properties in terms of the limit operators of the given band-dominated operator. The main objective of the second part is to apply these results to pseudodifferential operators on cones in R-n which is possible after a suitable discretization MH - Germany MH - Mexico|Distrito Federal MH - Russia PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 14 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000169738400005 SO - Integral Equations and Operator Theory 2001 ;40(3):342-381 4018 UI - 13540 AU - Rabinovich VS AU - Roch S AU - Silbermann B AD - Inst Politecn Nacl, ESIME Zacatenco, SEPI, Mexico City 07738, DF, MexicoTech Univ Darmstadt, Fachbereich Math, D-64289 Darmstadt, GermanyTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyRabinovich, VS, Inst Politecn Nacl, ESIME Zacatenco, SEPI, Ed 1,2 Do Piso,Av IPN, Mexico City 07738, DF, Mexico TI - Algebras of approximation sequences: Finite sections of band-dominated operators AB - We develop the stability theory for the finite section method for general band-dominated operators on l(p) spaces over Z(k). The main result says that this method is stable if and only if each member of a whole family of operators - the so-called limit operators of the method - is invertible and if the norms of these inverses are uniformly bounded MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000169076800018 L2 - band-dominated operators;finite sections;stability SO - Acta Applicandae Mathematicae 2001 ;65(1-3):315-332 4019 UI - 14391 AU - Rachkovskij DA AU - Kussul EM AD - VM Glushkov Cybernet Ctr, UA-252022 Kiev 22, UkraineUniv Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoRachkovskij, DA, VM Glushkov Cybernet Ctr, Pr Acad Glushkova 40, UA-252022 Kiev 22, Ukraine TI - Binding and normalization of binary sparse distributed representations by context-dependent thinning AB - Distributed representations were often criticized as inappropriate for encoding of data with a complex structure. However Plate's holographic reduced representations and Kanerva's binary spatter codes are recent schemes that allow on-the-fly encoding of nested compositional structures by real-valued or dense binary vectors of fixed dimensionality. In this article we consider procedures of the context-dependent thinning developed for representation of complex hierarchical items in the architecture of associative-projective neural networks. These procedures provide binding of items represented by sparse binary codevectors (with low probability of 1s). Such an encoding is biologically plausible and allows a high storage capacity of distributed associative memory where the codevectors may be stored. In contrast to known binding procedures, context-dependent thinning preserves the same low density (or sparseness) of the bound codevector for a varied number of component codevectors. Besides, a bound codevector is similar not only to another one with similar component codevectors (as in other schemes) but also to the component codevectors themselves. This allows the similarity of structures to be estimated by the overlap of their codevectors, without retrieval of the component codevectors. This also allows easy retrieval of the component codevectors. Examples of algorithmic and neural network implementations of the thinning procedures are considered. We also present representation examples for various types of nested structured data (propositions using role filler and predicate arguments schemes, trees, and directed acyclic graphs) using sparse codevectors of fixed dimension. Such representations may provide a fruitful alternative to the symbolic representations of traditional artificial intelligence as well as to the localist and microfeature-based connectionist representations MH - Mexico|Distrito Federal MH - Ukraine PB - CAMBRIDGE: M I T PRESS RP - NOT IN FILE U3 - TC 12 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0899-7667 UR - ISI:000166645700007 L2 - NEURAL NETWORKS; CONNECTIONIST; SYSTEMS SO - Neural Computation 2001 ;13(2):411-452 4020 UI - 12585 AU - Radler KH AU - Fuchs H AU - Geppert U AU - Rheinhardt M AU - Zannias T AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Michoacanc SNH, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoRadler, KH, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - General-relativistic free decay of magnetic fields in a spherically symmetric body AB - The decay of a magnetic field penetrating a compact spherical electrically conducting body and continuing in its nonconducting surroundings is systematically studied. The body, considered as a rough model of a compact spherical star, is assumed to be nonrotating and showing no internal motion, and so the metric of the spacetime is static and spherically symmetric. Starting from the absolute space formalism of curved-space electrodynamics the initial value problem for the magnetic field is formulated. The concept of poloidal and toroidal fields is used to reduce the equations describing this problem to equations for the defining scalars of the magnetic field. By expansion of them in a series of spherical harmonics equations are derived for functions of the radial and time coordinates. A solution of these equations for the outer space is given. For the case of time-independent conductivity of the body, the equations for the interior of the body are reduced to ordinary differential equations which pose eigenvalue problems of the Sturm-Liouville type. After these reductions the solution of the initial value problem for the magnetic field is given as a superposition of magnetic field modes decaying exponentially in time. The shape of the modes is determined by the eigenfunctions of the Sturm-Liouville problems mentioned, and the decay rates by the corresponding eigenvalues. Explicit results, mainly gained by solving the relevant equations numerically, are given for the simple extreme case of constant density of the body. Their most striking feature is that all growth rates decrease with the growing compactness of the body. Furthermore, some concentration of the magnetic field in the inner parts occurs for high compactness. The consequences of our findings for the magnetic-field evolution in neutron stars are discussed as well as the implications for dynamo models MH - Germany MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000171654700012 L2 - NEUTRON-STARS SO - Physical Review D 2001 ;6408(8): 4021 UI - 15198 AU - Radwan FFY AU - Burnett JW AU - Bloom DA AU - Coliano T AU - Eldefrawi ME AU - Erderly H AU - Aurelian L AU - Torres M AU - Heimer-de la Cotera E AD - Univ Maryland, Sch Med, Dept Dermatol, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Pharmacol & Expt Therapeut, Baltimore, MD 21201, USAUniv Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla, Queretaro, MexicoBurnett, JW, Univ Maryland, Sch Med, Dept Dermatol, 405 W Redwood St, Baltimore, MD 21201 USA TI - A comparison of the toxinological characteristics of two Cassiopea and Aurelia species AB - A comparison of the toxinological properties of nematocyst venoms from Old and New World Cassiopea and Aurelia species was undertaken. The cnidom of venomous Cassiopea andromeda (Ca) and Aurelia (Aa(Rs)) from the Red Sea was identical to that of nonvenomous Bahamian Cassiopea xamancha (Cx) and Chesapeake Bay Aurelia aurita (Aa(CB)), respectively. A clean nematocyst preparation of Cn and both Aurelias could be obtained but algal particles could not be separated completely From the Cx nematocysts. Further purification of all four nematocyst preparations showed significant differences in the action of their protein. Only the Cassiopea had coexisting dermonecrotic and vasopermeability producing properties and Ca's hemolytic activity was associated with mouse lethality. The protein, hemolysin and phospholipase gel filtration eluant curves of Ca venom were similar. Venomous AaRs actively stung lips and contained more potent mouse lethal, demonecrotic, vasopermeability plus hemolytic factors than Aa(CB). Cross reactivity of convalescent human serum obtained from patients stung by Ca and venomous Cx collected in Central America occurred. This was also observed between sera of bathers stung by AaRs and stinging Aurelia which appeared in Florida during the recent El Nino year. IgG was stimulated by several nematocyst proteins since many venom subfractions tested positive at high titers against convalescent sera. T-cell proliferation of mice primed with either Aurelia venom was positive against the homologous preparation with cross reactivity to the heterologous venom. Crude venoms of both Red Sea jellyfish metabolically stimulated cultured human hepatocytes more than their New World counterparts. This data shows that considerable similarities and differences exist in the venoms of these Old and New World Cassiopea and Aurelia medusae with the Eastern species being more potent. (C) 2000 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000089441800011 L2 - jellyfish;Cassiopea;venoms;toxins;Red Sea;Aurelia;CHRYSAORA-QUINQUECIRRHA; NEMATOCYST VENOM; JELLYFISH; PURIFICATION; PROTEINS SO - Toxicon 2001 ;39(2-3):245-257 4022 UI - 13961 AU - Raga A AU - Cabrit S AU - Dougados C AU - Lavalley C AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCanada France Hawaii Telescope Corp, Kamuela, HI 96743, USAObserv Grenoble, Astrophys Lab, CNRS, UJF UMR 5571, F-38041 Grenoble, FranceObserv Paris, DEMIRM, UMR 8540 CNRS, F-75014 Paris, FranceRaga, A, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - A precessing, variable velocity jet model for DG Tauri AB - We present a first attempt at reproducing the morphology and kinematical properties of the DG Tau microjet using a 3D hydrodynamical numerical simulation of a precessing, variable velocity jet. Synthetic maps and position-velocity diagrams in H alpha and [O I]lambda 6300 are calculated and compared with recent imaging and spectre-imaging observations (Lavalley-Fouquet ct al. 2000; Dougados ct al. 2000). Several observed properties are qualitatively reproduced, such as: the knot separation, width, and asymmetric morphology, and the increase in ionization fraction and decrease in electronic density away from the star. However, the predicted kinematics in the region between the two jet knots differs from the observed behaviour. This discrepancy probably results from our simple assumption of a sinusoidal velocity variability, and points: to a more complex velocity time-variability in the jet from DG Tan MH - France MH - Mexico|Distrito Federal MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167938200026 L2 - hydrodynamics;stars : individual : DG Tau ISM : HH objects;ISM : individual objects : HH 158;ISM : jets and outflows;STELLAR JETS; YOUNG STARS; MASS-LOSS; OUTFLOWS; FLOWS; SPECTROSCOPY; SIMULATIONS; IONIZATION; KINEMATICS; DIRECTION SO - Astronomy & Astrophysics 2001 ;367(3):959-966 4023 UI - 14074 AU - Raga GB AU - Castro T AU - Baumgardner D AD - Natl Autonomous Univ Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80307, USARaga, GB, Natl Autonomous Univ Mexico, Ctr Ciencias Atmosfera, Ciudad Univ, Mexico City 04510, DF, Mexico TI - The impact of megacity pollution on local climate and implications for the regional environment: Mexico City AB - We present calculations to estimate potential changes to the local climate and photochemistry caused by pollutants (gases and particles) produced in Mexico City, and the implications for the regional scale when pollutants are exported to surrounding regions. Measured aerosol optical properties are used in a 2-stream delta-Eddington radiative transfer model (Slingo and Schrecker, 1982. Quarterly Journal of the Royal Meteorological Society 108, 407-426) to estimate net radiative fluxes and heating rates, while photolysis rates for nitrogen dioxide and ozone are estimated from a much more detailed model (Madronich, 1987. Journal of Geophysical Research 92, 9740-9752). The presence of highly absorbing aerosols in Mexico City leads to a 17.6% reduction in solar radiative flux at the surface when an optical depth of 0.55 is considered. Photolysis rates for nitrogen dioxide and ozone are reduced between 18 and 21% at the surface, while an increase of between 15 and 17% is predicted above the boundary layer, for local noon calculations. The: non-uniform vertical structure of aerosol concentrations observed (Perez Vidal and Raga, 1998. Atmosfera 11, 95-108) plays a significant role in determining localized regions of heating, i.e. stabilization at the top of the boundary layer that results in a temperature increase of 0.4K h(-1) at that level. The presence of a 200 m-deep aerosol layer at the top of the boundary layer results in vertical profiles of the photolysis rates that are significantly different from the case where the aerosols are uniformly distributed in the mixed layer. At the bottom of the aerosol layer (about I km above the surface), the rates are about 28% lower than when there is a uniform aerosol distribution in the boundary layer. Finally, there is also an enhancement of photolysis rates at the top of the boundary layer that may lead to increased ozone production com pared to the non-aerosol case. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000167745600009 L2 - Mexico City air quality;aerosol optical properties;regional impact of megacity pollution;aerosol-photochemistry interactions;BOUNDARY-LAYER EVOLUTION; ATMOSPHERE; AEROSOLS; BASIN; RADIATION; CLOUDS; MODEL; RATES; NO2 SO - Atmospheric Environment 2001 ;35(10):1805-1811 4024 UI - 13132 AU - Raggi F AU - Montes JR AU - Wisbauer R AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Dusseldorf, Inst Math, D-40225 Dusseldorf, GermanyRaggi, F, Natl Autonomous Univ Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - The lattice structure of hereditary pretorsion classes AB - In this paper we continue the investigation of the lattice structure of hereditary pretorsion classes [(Comm. Algebra 1994, 22, 3613-3627; ibid. 1995,23, 4173-4188)]. We show the existence of pseudocomplements and study right supplements for every hereditary pretorsion class. Moreover we investigate relations between these concepts and characterize a class of modules by means of these relations MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000170235300008 L2 - pretorsion;lattice;preradical SO - Communications in Algebra 2001 ;29(1):131-140 4025 UI - 13645 AU - Rahim R AU - Ochsner UA AU - Olvera C AU - Graninger M AU - Messner P AU - Lam JS AU - Soberon-Chavez G AD - Univ Guelph, Dept Microbiol, Guelph, ON N1G 2W1, CanadaUniv Colorado, Hlth Sci Ctr, Dept Microbiol, Denver, CO 80262, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62250, Morelos, MexicoAgr Univ Vienna, Zentrum Ultrastrukturforsch, A-1180 Vienna, AustriaAgr Univ Vienna, Ludwig Boltzmann Inst Mol Nanotechnol, A-1180 Vienna, AustriaLam, JS, Univ Guelph, Dept Microbiol, Guelph, ON N1G 2W1, Canada TI - Cloning and functional characterization of the Pseudomonas aeruginosa rhlC gene that encodes rhamnosyltransferase 2, an enzyme responsible for di-rhamnolipid biosynthesis AB - Pseudomonas aeruginosa is an opportunistic pathogen capable of producing a wide variety of virulence factors, including extracellular rhamnolipids and lipopolysaccharide. Rhamnolipids are tenso-active glycolipids containing one (mono-rhamnolipid) or two (di-rhamnolipid) l-rhamnose molecules. Rhamnosyltransferase 1 (RhlAB) catalyses the synthesis of mono-rhamnolipid from dTDP-L-rhamnose and beta -hydroxydecanoyl-beta -hydroxydecanoate, whereas di-rhamnolipid is produced from mono-rhamnolipid and dTDP-L-rhamnose. We report here the molecular characterization of rhlC, a gene encoding the rhamnosyltransferase involved in di-rhamnolipid (L-rhamnose-L-rhamnose-beta -hydroxydecanoyl-beta -hydroxydecanoate) production in P. aeruginosa. RhlC is a protein consisting of 325 amino acids with a molecular mass of 35.9 kDa. It contains consensus motifs that are found in other glycosyltransferases involved in the transfer of l-rhamnose to nascent polymer chains. To verify the biological function of RhlC, a chromosomal mutant, RTII-2, was generated by insertional mutagenesis and allelic replacement. This mutant was unable to produce di-rhamnolipid, whereas mono-rhamnolipid was unaffected. In contrast, a null rhlA mutant (PAO1-rhlA) was incapable of producing both mono- and di-rhamnolipid. Complementation of mutant RTII-2 with plasmid pRTII-26 containing rhlC restored the level of di-rhamnolipid production in the recombinant to a level similar to that of the wild-type strain PAO1. The rhlC gene was located in an operon with an upstream gene (PA1131) of unknown function. A sigma (54)-type promoter for the PA1131-rhlC operon was identified, and a single transcriptional start site was mapped. Expression of the PA1131-rhlC operon was dependent on the P. aeruginosa rhl quorum-sensing system, and a well-conserved lux box was identified in the promoter region. The genetic regulation of rhlC by RpoN and RhlR was in agreement with the observed increasing RhlC rhamnosyltransferase activity during the stationary phase of growth. This is the first report of a rhamnosyltransferase gene responsible for the biosynthesis of di-rhamnolipid MH - Austria MH - Canada MH - Mexico|Morelos MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 37 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000168748300018 L2 - L-RHAMNOSE BIOSYNTHESIS; BIOSURFACTANT SYNTHESIS; ESCHERICHIA-COLI; SHIGELLA-FLEXNERI; DEFICIENT MUTANT; OUTER-MEMBRANE; STRAIN PAO1; SEROTYPE O5; LIPOPOLYSACCHARIDE; CORE SO - Molecular Microbiology 2001 ;40(3):708-718 4026 UI - 14114 AU - Rahn M AU - Haas JD AU - Rivera JA AD - Natl Inst Publ Hlth, Cuernavaca, Morelos, MexicoCornell Univ, Ithaca, NY, USA TI - Menarcheal maturity and adjusted VO(2)max in adolescent Guatemalan females aged 11 to 18 years MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103518 SO - Faseb Journal 2001 ;15(4):A614-A614 4027 UI - 13748 AU - Ramanauskas R AU - Gudaviciute L AU - az-Ballote L AU - Bartolo-Perez P AU - Quintana P AD - Inst Chem, Corros Res Dept, LT-2600 Vilnius, LithuaniaIPN, CINVESTAV, Dept Appl Phys, Merida 97310, MexicoRamanauskas, R, Inst Chem, Corros Res Dept, Gostauto 9, LT-2600 Vilnius, Lithuania TI - Corrosion behaviour of chromated Zn and Zn alloy electrodeposits AB - The influence of a chromate film on the corrosion behaviour of Zn, Zn-Co and Zn-Fe coatings was investigated. XPS, AES techniques were applied for characterisation of the iridescent chromate films, while the XRD method was used for the corrosion product analysis. Atmospheric field (4 years data), accelerated (neutral salt spray and SO, cabinet) tests and electrochemical measurements were applied for the corrosion resistance studies. The beneficial influence of alloying for chromated Zn electrodeposits was observed under the conditions, where Cl- ions were the dominant pollutant (marine test site, Cl- cabinet, Cl- aqueous solution). The degree of protection from the chromate film, in spite of their lower thickness, was detected to be higher for the alloyed samples. A higher concentration of Cr(VI) compounds in the passive chromate layers of alloyed samples may be the reason of their superior corrosion resistance. (C) 2001 Elsevier Science B.V. All rights reserved MH - Lithuania MH - Mexico|Yucatan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000168504400006 L2 - zinc alloy electrodeposits;chromate film;atmospheric corrosion;aqueous corrosion;ZINC; COATINGS; RESISTANCE; FILMS; MICROSTRUCTURE SO - Surface & Coatings Technology 2001 ;140(2):109-115 4028 UI - 10653 AU - Ramirez-Benitez MD AU - Moreno-Hagelsieb G AU - Almagro JC AD - UNAM, Inst Biotechnol, Mexico City, DF, MexicoUNAM, Ctr Invest Sobre Fijac Nitrogeno, Programa Biol Computac, Mexico City, DF, MexicoFred Hutchinson Canc Res Ctr, Seattle, WA 98109, USAAlmagro, JC, UNAM, Inst Biotechnol, Mexico City, DF, Mexico TI - VIR.II: a new interface with the antibody sequences in the Kabat database AB - The Kabat database is the source of information par excellence on antibody sequences. In 1995, we developed an interface with the Kabat database, called VIR. VIR has been very useful in conducting studies aiming to find structure-function relationships in antibodies. Here we report a new version adapted to the World Wide Web, called VIR.II. VIR.II allows searches by type of chain (V, or V,), by species, and by specificity. The species are selected using a pulldown menu, whereas the specificities can be selected from a list containing the unique specificities reported in the Kabat database. These facilities avoid mistakes and redundancies in the searches. Another feature, and probably the most important one, is that VIR.II introduces a classification of specificities in terms of the chemical and biochemical nature of the antigen, like anti-protein, anti-peptide, anti-hapten, etc. This classification has been useful in discovering patterns in the antigen-binding site of antibodies that correlate with the type of antigen the antibody interacts with. To illustrate this, while showing the capabilities of VIR.II, we analyze all the murine anti-peptide and anti-protein antibody sequences compiled as of July, 2000 in the Kabat database. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Biology U5 - J;Article AV - English IS - 0303-2647 UR - ISI:000177044300005 L2 - immunoglobulin;complementarity determining regions;CDRs;antigen-binding site;amino acid sequences;nucleotide sequences;AMINO-ACID-SEQUENCES; BINDING-SITE; COMPLEMENTARITY; REPERTOIRES; RECOGNITION; MECHANISM; SEGMENTS; REGIONS; GENES SO - Biosystems 2001 ;61(2-3):125-131 4029 UI - 15282 AU - Ramirez-Cano F AU - Ramos-Quirarte A AU - Faix O AU - Meier D AU - Gonzalez-Alvarez V AU - Zuniga-Partida V AD - Fed Res Ctr Forestry & Forest Prod, Inst Wood Chem & Chem Technol Wood, D-21027 Hamburg, GermanyUniv Guadalajara, Dept Wood Pulp & Paper, Zapopan 45020, Jalisco, MexicoUniv Nayarit, Sch Agr, Tepis, Nay, MexicoMeier, D, Fed Res Ctr Forestry & Forest Prod, Inst Wood Chem & Chem Technol Wood, D-21027 Hamburg, Germany TI - Slow-release effect of N-functionalized kraft lignin tested with Sorghum over two growth periods AB - Biomass production of fodder sorghum (Sorghum sp.) has been tested in a field trial over two harvesting periods under natural meteorological conditions using ammoxidized kraft lignin (AKL) as a slow-release fertilizer and urea as conventional reference. In the course of the first growth cycle, plants treated with urea gave higher biomass yields because of the better solubility of urea in the initial phase. However, during the second cycle AKL treated plants performed better than urea treated sorghum, indicating that nitrogen from AKL became readily available. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Jalisco MH - Mexico|Nayarit PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000089264700012 L2 - kraft lignin;oxo-ammoniation;Sorghum;slow release fertilizer SO - Bioresource Technology 2001 ;76(1):71-73 4030 UI - 14683 AU - Ramirez-Cuesta AJ AU - Cordero S AU - Rojas F AU - Faccio RJ AU - Riccardo JL AD - Univ Nacl San Luis, Dept Fis, Lab Ciencias Superficies & Medios Porosos, RA-5700 San Luis, ArgentinaUniv Reading, Dept Chem, Reading RG6 6AD, Berks, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoRamirez-Cuesta, AJ, Univ Nacl San Luis, Dept Fis, Lab Ciencias Superficies & Medios Porosos, Chacabuco 917, RA-5700 San Luis, Argentina TI - On modeling, simulation and statistical properties of realistic three dimensional porous networks AB - The basis for modeling and simulation of self-consistent porous networks encompassing pore and throat-size distributions, size correlation and non-uniform connectivity are given. The framework is a straightforward generalization of the Dual Site-Bond Description (DD) of Ref. (J. Chem. Soc. Faraday Trans I 84, 801 (1988)), which considers heterogeneity (size distribution of entities), correlation and connectivity as interdependent characteristics of the porous space. A general and technically simple method for Monte Carlo simulation of three-dimensional networks is presented and exemplified. Statistical and topological properties of simulated networks are shown and analyzed MH - Argentina MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Applied;Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1380-2224 UR - ISI:000165965900007 L2 - porous media;capillary condensation;nitrogen adsorption;simulation;NITROGEN SORPTION MEASUREMENTS; SITE-BOND PERCOLATION; CATALYTIC DEACTIVATION; CAPILLARY CONDENSATION; HETEROGENEOUS SURFACES; TWOFOLD DESCRIPTION; MEDIA; CONNECTIVITY; SOLIDS; RECONSTRUCTION SO - Journal of Porous Materials 2001 ;8(1):61-76 4031 UI - 12424 AU - Ramirez-Perez F AU - Serfling R AD - Univ Autonoma Chapingo, Dept Fitotecnia, Area Estadist, Chapingo Edo 56230, MexicoUniv Texas, Dept Math Sci, Richardson, TX 75083, USARamirez-Perez, F, Univ Autonoma Chapingo, Dept Fitotecnia, Area Estadist, Chapingo Edo 56230, Mexico TI - Shot noise on cluster processes with cluster marks, and studies of long range dependence AB - With the aim of providing greater flexibility in developing and applying shot noise models, this paper studies shot noise on cluster point processes with both pointwise and cluster marks. For example, in financial modelling, responses to events in the financial market may occur in clusters, with random amplitudes including a 'cluster component' reflecting a degree of commonness among responses within a cluster. For such shot noise models, general formulae for the characteristic functional are developed and specialized to the case of Neyman-Scott clustering with cluster marks. For several general forms of response function, long range dependence of the corresponding equilibrium shot noise models is investigated. It is shown, for example, that long range dependence holds when the 'structure component' of the response function decays slowly enough, or when the response function has a finite random duration with a heavy tailed distribution MH - Mexico|Estado De Mexico MH - USA PB - SHEFFIELD: APPLIED PROBABILITY TRUST RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0001-8678 UR - ISI:000172079700007 L2 - shot noise;point processes;cluster processes;long range dependence;heavy tails;equilibrium behaviour;financial modelling SO - Advances in Applied Probability 2001 ;33(3):631-651 4032 UI - 13543 AU - Ramirez-Rosales D AU - Zamorano-Ulloa R AU - Perez-Martinez O AD - IPN, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoUniv La Habana, Fac Fis, Inst Mat & React, La Habana 10400, CubaRamirez-Rosales, D, IPN, Escuela Super Fis & Matemat, Dept Fis, Edif 9,UP Zacatenco, Mexico City 07738, DF, Mexico TI - Electron spin resonance study of the conversion of Mn4+ to Mn2+ in the Pb1-xEuxTi1-yMnyO3 ceramic system AB - Electron spin resonance (ESR) studies of the Pb0.88Eu0.08 Ti1-yMnyO3 (y = 0.0, 0.1, 0.2, 0.3); PbTi0.98Mn0.02O3 and PbTiO3 ferroelectric ceramics are reported. The conversion of Mn4+ to Mn2+ in the Pb0.88Eu0.88Ti1-yMnyO3 ceramics compositions have been clearly demonstrated. The presence of the Eu cation is necessary for such conversion to take place and it does not take place in the PbTi0.98Mn0.02O3 ceramic. Analysis of its ESR spectra indicates that Mn4+ substitution occurs at the Ti4+ at two different ESR-distinguishable locations. Both factors, namely the Mn4+ --> Mn2+ conversion and the Eu3+ presence are responsible for the large microstrain and the deterioration of crystallinity observed in this ceramics, which seemed to play a crucial role for reading large piezoelectric anisotropy in the system. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000169031000009 L2 - electron spin resonance;LEAD TITANATE CERAMICS; PARAMAGNETIC-RESONANCE; MECHANICAL-PROPERTIES; PBTIO3; BATIO3 SO - Solid State Communications 2001 ;118(7):371-376 4033 UI - 13474 AU - Ramirez-Silva L AU - Ferreira ST AU - Nowak T AU - de Gomez-Puyou MT AU - Gomez-Puyou A AD - Natl Autonomous Univ Mexico, Dept Bioquim, Fac Med, Mexico City 04510, DF, MexicoUniv Fed Rio de Janeiro, Inst Ciencias Biomed, Dept Bioquim Med, BR-21941 Rio De Janeiro, BrazilUniv Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556, USANatl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoRamirez-Silva, L, Natl Autonomous Univ Mexico, Dept Bioquim, Fac Med, Apartado Postal 70-159, Mexico City 04510, DF, Mexico TI - Dimethylsulfoxide promotes K+-independent activity of pyruvate kinase and the acquisition of the active catalytic conformation AB - Pyruvate kinase requires K+ for maximal activity; the enzyme exhibits 0.02% of maximal activity in its absence [Kayne, EJ. (1971) Arch. Biochem. Biophys. 143, 232-239]. However, pyruvate kinase entrapped in reverse micelles exhibits an important K+-independent activity [Ramirez-Silva,L., Tuena de Gomez-Puyou,M., & Gomez-Puyou, A. (1993) Biochemistry 32, 5332-5338]. It is possible that the amount of water, as well as interactions of the protein with the micelles, can account for this behavior. We therefore explored the solvent effects on the catalytic properties of muscle pyruvate kinase. The enzyme exhibited an activity of 19.4 mu mol min(-1). mg(-1) in 40% dimethylsulfoxide, compared with 280 and 0.023 mu mol. min(-1).mg(-1) observed with and without K+ in water, respectively. pH activity profiles and kinetic constants for the substrates of pyruvate kinase in dimethylsulfoxide without K+ were similar to those in 100% water with K+, and differed from those in water without K+. The spectral center of mass of the emission spectrum of pyruvate kinase in 100% water exhibited a blue shift of 3.5 nm in the presence of Mg2+, phosphenolpyruvate, and K+, ligands that induce the active conformation of the enzyme. The spectral center of mass of the apoenzyme in 30-40% dimethylsulfoxide coincided with that of the enzyme -Mg2+ -phosphenolpyruvate-K+ complex in 100% water. The water relaxation rate enhancement factor and binding of phosphenolpyruvate to the pyruvate kinase-Mn2+-(CH3)(4)N+ complex in 30-40% dimethylsulfoxide were similar to those of the pyruvate kinase-Mn2+-K+ complex in water. The aforementioned results indicate that when muscle pyruvate kinase is without K+, 30-40% dimethylsulfoxide induces its active conformation MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000169353300016 L2 - catalytic conformation;cosolvents;dimethylsulfoxide;pyruvate kinase;RABBIT MUSCLE; POLYETHYLENE-GLYCOL; ANGSTROM RESOLUTION; SELF-ASSOCIATION; ACTIVATION; WATER; MECHANISM; PHOSPHOFRUCTOKINASE; ENZYMOLOGY; PROTEINS SO - European Journal of Biochemistry 2001 ;268(11):3267-3274 4034 UI - 13116 AU - Ramirez-Solis A AU - Vallet V AU - Teichteil C AU - Leininger T AU - Daudey JP AD - Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoUniv Toulouse 3, CNRS, UMR 5626,IRSAMC, Phys Quant Lab, F-31062 Toulouse, FranceRamirez-Solis, A, Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Accurate ab initio study on the spectroscopy of Ag and Ag+ including spin-orbit couplings aimed at molecular calculations AB - Very accurate ab initio electronic + spin-orbit calculations of the lowest-lying states of the Ag atom and Ag+ cation have been performed through the CASSCF + ACPF + EPCISO method, using the Stuttgart small-core (19 active electrons) relativistic effective core potential (RECP) as well as its associated D-2 spin-orbit effective potential. An ad hoc spin-orbit P-symmetry pseudopotential for the P-2 state adapted to this 19-e RECP and basis set was extracted. The Stuttgart basis set was augmented to a large valence Gaussian basis set (8s8p7d3f3g/6s6p4d3f3g) in order to reproduce at best the experimental S-2-D-2 and S-2-P-2 transition energies as well as the ionization potential (IP) of Ag, which play a crucial role for the accurate description of the spectroscopy in silver-containing molecular systems. A detailed discussion on the multiple schemes used to deal with the differential d(10) vs d(9) electronic correlation for these two excited states is given. The role of the 4s and 4p (core) shells on the S-2-D-2 and S-2-P-2 transition energies and the IP is carefully studied and discussed. The core-core correlation is found to play a minor role while an insufficient treatment of the core-valence electronic correlation is responsible for the main differential d(10) vs d(9) correlation energy error between the S-2-D-2 and S-2-P-2 transition energies. For the neutral atom, the D-2(5/2)-D-2(3/2) and P-2(3/2)-P-2(1/2) splittings are in excellent agreement with the experimental ones. However, the relative calculated energetic ordering for the D-2(5/2),D-2(3/2),P-2(3/2), and P-2(1/2) fine structure components is critically dependent on the J-averaged purely electronic ACPF P-2 and D-2 energies of the parent states. The D-3 fine-structure splitting for the ion is also found in good agreement with the experiment. (C) 2001 American Institute of Physics MH - France MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 12 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000170278200035 L2 - LYING ELECTRONIC STATES; CONFIGURATION-INTERACTION; EXCITED-STATES; FIRST-ROW; TRANSITION; IODINE; CUCL; (3)SIGMA(+); (1)SIGMA(+); ELEMENTS SO - Journal of Chemical Physics 2001 ;115(7):3201-3207 4035 UI - 13057 AU - Ramirez-Victoria P AU - Guzman-Rincon J AU - Espinosa-Aguirre JJ AU - Murillo-Romero S AD - Natl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Invest Nucl, Dept Biol, Mexico City 11801, DF, MexicoRamirez-Victoria, P, Inst River Res Int, 920 Ironwood Dr,Suite 344, Rochester, MI 48307 USA TI - Antimutagenic effect of one variety of green pepper (Capsicum spp.) and its possible interference with the nitrosation process AB - It is known that the poblano green pepper, a significant component in the Mexican diet, contains certain natural compounds such as chlorophyll, beta -carotene, and vitamins, which have antimutagenic and/or anticarcinogenic properties. Using the somatic mutation and recombination test in wing cells of Drosophila melanogaster, an extract of the poblano pepper (Capsicum spp.) was evaluated to determine its antimutagenic effect against the nitrosation process, simulating the process occurring in the human stomach caused by known food additives. Larvae of 72 h old D. melanogaster of standard (ST) and high bioactivation (HB]) crosses were exposed in a simultaneous, chronic treatment with the juice expressed from the crushed, whole, fresh pepper fruit, plus the mixture of 20 mM methyl urea (MU) and sodium nitrite (SN), mixed with the animals' food. Three doses of pepper juice (12.5, 25, and 50%) were used. The background mutation rate given as spots per wing was 0.36 and 0.48 for ST and HB, respectively. Mutation frequencies produced by the MU and SN mixture was 1.73 (ST) and 26.46 (HB) mutations per wing. The poblano juice decreased the above rates between 40 and 80%, respectively. The experiments suggest that some compounds present in the green pepper may cause this antimutagenic effect by interfering with the nitrosation process. The role of the extract and one of its components, such as vitamin C, in the nitrosation process will be discussed. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000170481900006 L2 - antimutagenicity;green pepper;endogenous nitrosation;Drosophila melanogaster;SMART;TOBACCO-SPECIFIC NITROSAMINES; DROSOPHILA-MELANOGASTER; SOMATIC MUTATION; HUMAN CANCER; VITAMIN-C; RECOMBINATION TEST; MECHANISMS; INHIBITION; METABOLISM; EXPOSURE SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2001 ;496(1-2):39-45 4036 UI - 12534 AU - Ramirez FD AU - Charbonniere L AU - Muller G AU - Scopelliti R AU - Bunzli JCG AD - CNRS, UPRESA 7008, Lab Chim Elect & Photon Mol, F-67087 Strasbourg 02, FranceUniv Lausanne, BCH, Inst Inorgan & Analyt Chem, CH-1015 Lausanne, SwitzerlandInst Nacl Invest Nucl, Dept Quim, Salazar 52045, Edo De Mexico, MexicoBunzli, JCG, CNRS, UPRESA 7008, Lab Chim Elect & Photon Mol, 25 Rue Becquerel, F-67087 Strasbourg 02, France TI - A p-tert-butylcalix[4]arene functionalised at its lower rim with ether-amide pendant arms acts as an inorganic-organic receptor: structural and photophysical properties of its lanthanide complexes AB - The new narrow-rim functionalised receptor 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis[2-(diethylcarbamoylmeth oxy) ethoxy] calix[4]arene (A(4)bL(4)) has been synthesised. NMR spectra show it to adopt a cone conformation in solution with a time-averaged C-4v symmetry. A(4)bL(4) reacts with trivalent lanthanide ions in acetonitrile to yield 1:1 complexes with logK(1) in the range 8.6-9.6, as demonstrated by ES-MS, H-1- and C-13-NMR data. Complexes with Ln = Eu, Gd, Tb, and Lu have been isolated and the crystal structure of [Lu(A(4)bL(4))(H2O)](CF3SO3)(3). 2Et(2)O shows the metal ion encapsulated in the cavity formed by the four arms. Lu-III is 9-co-ordinated, being bound to the four ether and four carbonyl functions and to a water molecule itself H-bonded to the phenolic ether functions, which rigidifies the cavity formed by the pendant arms. Additionally, an ether molecule is inserted into the hydrophobic cavity defined by the aromatic rings. Both NMR (La, Lu) and luminescence (Eu, Tb) data point to a fairly high local symmetry at the metal centre, while lifetime determinations are consistent with the co-ordination of an inner-sphere water molecule. The new ligand sensitises the luminescence of the Tb-III ion (Q(abs) = 5.8% in acetonitrile, tau (F) = 1.42 ms) while the probable presence of a LMCT state severely limits such a process for Eu-III : Q(abs) = 2.0%, tau (F) = 0.73 ms MH - France MH - Mexico|Estado De Mexico MH - Switzerland PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000171869800014 L2 - SENSITIZER-MODIFIED CALIX<4>ARENES; SOLID-STATE; ALKALI CATIONS; RARE-EARTH; IONS; LUMINESCENCE; LIGAND; ENCAPSULATION; ACETONITRILE SO - Journal of the Chemical Society-Dalton Transactions 2001 ;(21):3205-3213 4037 UI - 12598 AU - Ramirez M AU - Alexis J AU - Trapaga G AU - Jonsson P AU - McKelliget J AD - Mefos Met Res Plant, SE-97525 Lulea, SwedenIPN, CINVESTAV, Unidad Queretaro, Queretaro 76230, MexicoRoyal Inst Technol, Div Met, SE-10044 Stockholm, SwedenUniv Massachusetts, Dept Mech Engn, Lowell, MA 01854, USARamirez, M, Inst Tecnol Morelia, Av Tecnol 1500,CP 58120, Morelia, Michoacan, Mexico TI - Modeling of a DC electric arc furnace - Mixing in the bath AB - A mathematical model was developed to describe fluid flow, heat transfer and electromagnetic phenomena in the bath region of a Direct Current Electric Arc Furnace (DC-EAF). The different effects on the steel bath from the arc, a layer of slag on the top of the steel, and the injection of argon gas from the bottom, are represented using three different numeric approaches and analyzed in terms of fluid flow, heat transfer, and temperature stratification in the steel bath. Additionally, a sensitivity analysis was performed to explore the effect of the main process parameters and design variables of the process, such as furnace dimensions, arc conditions, and anode configurations. It was found that in the absence of gas injection, the electromagnetic body forces dominate the fluid flow in the bath region overcoming the opposite effects of buoyancy and shear from the arc. Injection of gases homogenizes the melt improving mixing, while the effect of the slag is to decrease mixing in the bath. Regarding the process analysis, the model showed that the best mixing and the best energy optimization from the arc are achieved when the geometry of the furnace presents the highest aspect ratio. Similarly, short arc lengths and high arc currents are beneficial for mixing. However, these improvements in mixing could be detrimental for the bottom refractory of the furnace because of the direct exposure of the hot metal coming from the arc attachment zone at the bottom wall. Then, the anode configuration can be designed to avoid excessive damage to the refractory MH - Mexico|Michoacan MH - Mexico|Queretaro MH - Sweden MH - USA PB - TOKYO: IRON STEEL INST JAPAN KEIDANREN KAIKAN RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0915-1559 UR - ISI:000171686400010 L2 - modeling;mixing;fluid flow;heat transfer;HEAT-TRANSFER SO - Isij International 2001 ;41(10):1146-1155 4038 UI - 14209 AU - Ramirez RG AU - Haenlein GFW AU - Nunez-Gonzalez MA AD - Fac Ciencias Biol, San Nicolas de los Garza 66451, NL, MexicoUniv Delaware, Coll Agr Sci, Dept Anim & Food Sci, Newark, DE 19717, USARamirez, RG, Fac Ciencias Biol, Apartado Postal 142,Sucursal F, San Nicolas de los Garza 66451, NL, Mexico TI - Seasonal variation of macro and trace mineral contents in 14 browse species that grow in northeastern Mexico AB - Leaves and twigs from shrub species consumed by range goats: Acacia berlandieri, Acacia farnesiana, Acacia greggii, Acacia rigidula, Celtis pallida, Cercidium macrum, Condalia obovata, Cordia boissieri, Desmanthus virgathus, Leucaena leucocephala, Leucophyllum texanum, Opuntia lindehimieri, Porlieria angustifolia, Prosopis glandulosa, and Ziziphus obtusifolia were evaluated for comparative seasonal contents of Ca, P, Mg K, Zn, Mn, Cu and Fe. Plants were collected in summer (September 12, 1992), fall (November 20, 1992), winter (February 20, 1993) and spring (May 22, 1993) in Marin, County, Nuevo Leon, Mexico. During spring and summer mineral concentrations were higher in general. Only Ca. Mg, K, and Fe were in substantial amounts in all seasons to meet adult goat requirements. With the exception of spring, shrubs had extremely low P concentrations. Manganese, Cu and Zn in most plants had low marginal levels to meet adult goat requirements. Moreover. potential intake of P, Mn, Cu and Zn in shrub species by goats weighing 50 kg BW consuming 2.0 kg per day DM was low. However. plants such as D. virgathus, L. texanum, P. glandulosa, L. leucocephala and C. macrum can be considered prominent components in diets of range goats because of their high mineral concentrations. It appears that ration formulations for range goats in northeastern Mexico should include P, Mn, Cu and Zn in all seasons of the year. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000167196500008 L2 - browse;northeastern Mexico;macrominerals;microminerals;mineral goat requirements;potential mineral intake;FORAGES SO - Small Ruminant Research 2001 ;39(2):153-159 4039 UI - 13248 AU - Ramirez SI AU - Navarro-Gonzalez R AU - Coll P AU - Raulin F AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, Mexico. Univ Paris 12, Lab Interuniv Syst Atmospher, F-94010 Creteil, France TI - Possible contribution of different energy sources to the production of organics in Titan's atmosphere AB - A quantitative comparison of the products arising from the irradiation of a Titan's simulated atmosphere is presented. The energy sources used represent some of the main events that occur in the satellite's atmosphere. All of the compounds identified are classified in the hydrocarbon and nitrile chemical families. Almost all of the detected compounds in Titan's atmosphere are produced by one or more energy sources. The compounds with the highest energy yields include the C-2 hydrocarbons, methanonitrile and ethanonitrile. The possibility of using some of the produced organics as tracer compounds during the Huygens descend to identify the leading energy form in the different atmospheric levels remains open. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal T3 - SPACE LIFE SCIENCES: LIFE IN THE SOLAR SYSTEM: PREBIOTIC CHEMISTRYAdvances in space research PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticle9SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSADV SPACE RESBS43Z AV - English IS - 0273-1177 UR - ISI:000169859700012 SO - 2001 ;(2):261-270 4040 UI - 11983 AU - Ramon F AU - Hernandez OH AU - Bullock TH AD - Univ Calif San Diego, Scripps Inst Oceanog, Neurobiol Unit, La Jolla, CA 92093, USAUniv Calif San Diego, Dept Neurosci, La Jolla, CA 92093, USAUniv Autonoma Campeche, Ctr Invest Enfermedades Trop, Campeche, MexicoUniv Nacl Autonoma Mexico, Fac Med, Div Posgrado & Invest, Mexico City 04510, DF, MexicoBullock, TH, Univ Calif San Diego, Scripps Inst Oceanog, Neurobiol Unit, La Jolla, CA 92093 USA TI - Event-related potentials in an invertebrate: crayfish emit 'omitted stimulus potentials' AB - Electrical signs of neural activity correlated with stimuli or states include a subclass called event-related potentials. These overlap with, but can often be distinguished from, simple stimulus-bound evoked potentials by their greater dependence on endogenous (internal state) factors. Studied mainly in humans, where they are commonly associated with cognition, they are considered to represent objective signs of moderately high-level brain processing. We tested the hypothesis that invertebrates lack such signs by looking in the crayfish Procambaras clarkii for a class of OFF-effects shown in humans to index expectancy. Disproving the hypothesis, we find, using chronic, implanted preparations, that a good omitted stimulus potential is reliably present. The system learns in a few cycles of a regularly repeated light flash to expect one on schedule. Omitted stimulus potentials are found in the protocerebrum, the circumesophageal connective and in the optic tract - perhaps arising in the retina, as in vertebrates. These potentials can be very local and can include loci with and without direct visual evoked potentials in response to each flash. In some loci, the omitted stimulus potential has a slow wave component, in others only a spike burst. Omitted stimulus potentials are more endogenous than visual evoked potentials, with little dependence on flash or ambient light intensity or on train duration. They vary little in size at different times of the day, but abruptly fail to appear if the ambient light is cut off. They can occur during walking, eating or the maintained defense posture but are diminished by 'distraction' and are often absent from an inert crayfish until it is aroused. We consider this form of apparent expectation of a learned rhythm (a property that makes it 'cognitive' in current usage), to be one of low level, even though some properties suggest endogenous factors. The Rashes in a train have an inhibitory effect on a circuit that quickly 'learns' the stimulus interval so that the omitted stimulus potential, ready to happen after the learned interval, is prevented by each flash, until released by a missing stimulus MH - USA MH - Mexico|Campeche MH - Mexico|Distrito Federal PB - CAMBRIDGE: COMPANY OF BIOLOGISTS LTD RP - NOT IN FILE U3 - TC 9 U4 - Biology U5 - J;Article AV - English IS - 0022-0949 UR - ISI:000173231500011 L2 - event-related potential;local field potential;expectation;endogenous;emitted wave;time-locked cognitive wave;crayfish;Procambarus clarkii;ELECTRICAL-ACTIVITY; BRAIN; RESPONSES; SIGNALS; FISH SO - Journal of Experimental Biology 2001 ;204(24):4291-4300 4041 UI - 13167 AU - Ramos-Mendoza A AU - Tototzintle-Huitle H AU - Mendoza-Galvan A AU - Gonzalez-Hernandez J AU - Chao BS AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, Qro, MexicoEnergy Convers Devices Inc, Troy, MI 48084, USA TI - Optical and structural properties of sol-gel SiO2 layers containing cobalt AB - SiO2 coatings containing cobalt were prepared using the sol-gel method and the Si to Co nominal atomic ratio in the coatings was varied from 1.3 to 7.1. The structure and optical properties of the coatings, heat-treated in air at 300 and 500 degreesC, were characterized using optical, x-ray diffraction, and Auger depth profile measurements. The optical transmission data in the UV-visible range, in samples with low cobalt concentrations, show only the absorption bands associated with the tetragonal Co2+ regardless of the heat treatment temperature. Coatings with a larger amount of Co treated at 300 degreesC show absorption bands associated with both tetragonal and octahedral Co2+. When these coatings are heat treated at 500 degreesC, most of the cobalt migrates to the free surface of the coatings, where it is oxidized by the atmospheric oxygen and forms a top layer Of Co3O4. The thickness of the cobalt oxide layer depends on the heat treatment temperature and on the Co concentration. To describe the absorption bands of both tetragonal and octahedral Co, the Lorentz oscillator model was used to represent the complex effective dielectric function of the SiO2 cobalt doped layers. The frequency dependence of the optical constants, in the UV-visible range for the top cobalt oxide layer, was obtained with a Jellison-Modine model. (C) 2001 American Vacuum Society MH - Mexico|Queretaro MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000170111100010 L2 - SPRAY-PYROLYSIS; FILMS; COATINGS; SILICA; CO3O4 SO - Journal of Vacuum Science & Technology A-Vacuum Surfaces and Films 2001 ;19(4):1600-1605 4042 UI - 12484 AU - Ramos FE AU - Garcia R AU - Hirata GA AU - Bosze EJ AU - McKittrick J AD - UNAM, CCMC, Ensenada 22860, Baja California, MexicoUniv Calif San Diego, La Jolla, CA 92093, USARamos, FE, UNAM, CCMC, Ensenada 22860, Baja California, Mexico TI - A new combustion synthesis technique for rare Earth-doped III-nitride luminescent powders AB - A new low temperature method to produce ((RE)(x)Ga1-x)(2)O-3 (1 greater than or equal to x greater than or equal to 0 and RE=Eu, Yb, Pr and Tm) powders with high purity, high chemical homogeneity and improved crystallinity has been developed. This procedure produces finely divided powders through an exothermic reaction between the precursors. The process starts with aqueous solutions of RE(NO3)(3) and Ga(NO3)3 as the precursors and hydrazine as the (non-carbonaceous) fuel. The combustion reaction occurs when heating the precursors between 150 and 200 degreesC in a closed vessel filled with an inert gas (Ar), which yields (RExGa1-x)(2)O-3 directly. The preparation of RE-doped Ga2O3 powders was using a now combustion synthesis technique (Hydrazine/metal nitrate method). The preparation of Eu-doped GaN was using the ammonium. hexafluoro-metal method. The powders were crystalline and high-purity as determined by XPS, EDS, SEM and XRD measurements MH - Mexico|Baja California MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900021 SO - Modern Physics Letters B 2001 ;15(17-19):655-658 4043 UI - 14087 AU - Ramos G AU - Scherzer BMU AD - EURATOM Assoc, Max Planck Inst Plasmaphys, D-85748 Garching, GermanyRamos, G, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Jose Siurob 10, Queretaro 76040, Mexico TI - Radiation damage, trapping and release of deuterium in diamond and HOPG-graphite AB - We report the research done on the radiation damage production in HOPG-graphite and diamond due to the implantation of deuterium ions and its relation to the trapping and release of deuterium in these materials. The radiation damage was estimated using Rutherford backscattering spectrometry in channelling geometry (RBS-c), while trapping and release processes were followed using the D(He-3,p)alpha nuclear reaction. The measured radiation damage is larger than TRIM.SP predictions in both materials. Deuterium-induced damage at low fluences shows similar annealing behaviour in HOPG and in diamond. Implanted deuterium shows similar trapping behaviour in HOPG and diamond, while the thermal release shows two regimes: at high fluences the release behaviour is similar in both materials, at low fluences only little deuterium is released from diamond up to 1100 K. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000167516600011 L2 - rutherford backscattering;diamond;graphite;PYROLYTIC-GRAPHITE; HYDROGEN; CARBON; IMPLANTATION; DEFECTS SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2001 ;174(3):329-336 4044 UI - 13601 AU - Ramos J AU - Gonzalez M AU - Ramirez F AU - Young R AU - Zuniga V AD - Univ Guadalajara, Dept Wood Cellulose & Paper, Guadalajara 44430, Jalisco, MexicoUniv Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706, USAYoung, R, Univ Guadalajara, Dept Wood Cellulose & Paper, Guadalajara 44430, Jalisco, Mexico TI - Biomechanical and biochemical pulping of suagarcane bagasse with Ceriporiopsis subvermispora fungal and xylanase pretreatments AB - Sugarcane bagasse was pretreated with both the white-rot. fungus, Ceriporiopsis subvermispora, and xylanase enzyme for 2 weeks before soda chemithermomechanical (CTMP) and soda chemical (CP) cooking. For fungi-CTMP (BCTMP) and enzyme-fungi-CTMP (EBCTMP), the bagasse, after bio-pretreatment, was cooked with 5% sodium hydroxide, at 130 degreesC for 20 min. For the chemical pulping (CP), after fungi pretreatment (BCP) or after xylanase and fungal pretreatment (EBCP), the bagasse was cooked:with 14.5% sodium hydroxide. With the BCTMP, the Klason lignin was reduced, all of the pulp strength properties were increased, and a 28% savings in refining energy consumption was obtained, but the brightness was reduced 5 points compared to the control. With the EBCTMP, the brightness losses were overcome but with a mild reduction in the pulp strength properties compared to the BCTMP. The energy savings were 5% greater than from BCTMP and 33% over the control. The BCP treatment increases somewhat the pulp strength properties, reduces the energy consumption 23%, and reduces the brightness by 9 points compared to the control; however, the kappa no, was 5.5 points higher than the control. EBCP treatment reduces brightness losses and increases the pulp yield 2% compared to the control, but with some reduction in the strength properties compared to BCP MH - Mexico|Jalisco MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000168967400018 L2 - biotechnology;biomechanical pulping;biochemical pulping;mechanical properties;optical properties;Ceriporiopsis subvermispora;sugarcane bagasse;energy consumption;scanning electron microscopy;HARDWOOD KRAFT PULP; WHITE-ROT FUNGI; PAPER-INDUSTRY; PHANEROCHAETE-CHRYSOSPORIUM; LOBLOLLY-PINE; LIGNIN; BIOTECHNOLOGY; ENZYMES; CHIPS; PAPERMAKING SO - Journal of Agricultural and Food Chemistry 2001 ;49(3):1180-1186 4045 UI - 13395 AU - Ramos JE AU - Del Rio F AU - Mclure IA AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, EnglandRamos, JE, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Accurate effective potentials and virial coefficients in real fluids - Part IV. Heterodiatomic and polyatomic substances with permanent multipoles and their mixtures with noble gases AB - The approximate nonconformal (ANC) theory recently proposed has been very successful for determining effective interaction parameters from the measured gas imperfection B(T) for a variety of substances, from the noble gases to perfluoro-n-alkanes. Here we report the application of the ANC treatment to the polar substances: NO, CO, HCl, CO2, H2O, D2O, NH3, CH2:CH2 and SF6 and predict the cross interactions in the mixtures of these substances with noble gases. The theory is successful in describing B(T). It also permits us to extract atom-atom potential parameters for CO. The resulting C-C interaction follows the simple dependence on atomic number already found for other atoms. For NO, which is partially dimerised in the gas phase, and using the approach pioneered by Guggenheim and Scott, the ANC theory gives a very good account of the observed B(T) for partially dimerised NO. Lastly, the ANC prediction of the cross virial coefficient is in excellent agreement with experiment in all but one of the binary mixtures considered MH - United Kingdom MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000169525300016 L2 - TEMPERATURE-RANGE; BINARY-MIXTURES; NONCONFORMAL POTENTIALS; TRANSPORT-PROPERTIES; MOLECULAR FLUIDS; CARBON-DIOXIDE; LIQUID REGIONS; PRESSURES; MPA; DENSITY SO - Physical Chemistry Chemical Physics 2001 ;3(13):2634-2643 4046 UI - 13592 AU - Rampoldi L AU - Dobson-Stone C AU - Rubio JP AU - Danek A AU - Chalmers RM AU - Wood NW AU - Verellen C AU - Ferrer X AU - Malandrini A AU - Fabrizi GM AU - Brown R AU - Vance J AU - Pericak-Vance M AU - Rudolf G AU - Carre S AU - Alonso E AU - Manfredi M AU - Nemeth AH AU - Monaco AP AD - Wellcome Trust Ctr Human Genet, Oxford, EnglandRoyal Melbourne Hosp, Walter & Eliza Hall Inst Med Res, Parkville, Vic 3050, AustraliaUniv Munich, Neurol Klin, Munich, GermanyNeurol Inst, Dept Clin Neurol, London, EnglandUnite Genet Med, Brussels, BelgiumCtr Hosp Univ Bordeaux, Hop Haut Leveque, Bordeaux, FranceIst Sci Neurol, Siena, ItalyUniv Verona, Dept Neurol & Visual Sci, Sect Clin Neurol, I-37100 Verona, ItalyCecil B Day Lab Muscle Res, Charlestown, MA, USADuke Univ, Med Ctr, Durham, NC, USAHop Univ Strasbourg, Strasbourg, FranceNatl Inst Neurol & Neurosurg Manuel Velasco Suarez, Dept Genet, Mexico City, DF, MexicoCasa Cura Poliambulanza Neurol, Brescia, ItalyChurchill Hosp, Dept Clin Genet, Oxford, EnglandMonaco, AP, Wellcome Trust Ctr Human Genet, Roosevelt Dr, Oxford, England TI - A conserved sorting-associated protein is mutant in chorea-acanthocytosis AB - Chorea-acanthocytosis (CHAC. MIM 200150) is an autosomal recessive neurodegenerative disorder characterized by the gradual onset of hyperkinetic movements and abnormal erythrocyte morphology(1,2) (acanthocytosis). Neurological findings closely resemble those observed in Huntington disease(3-8). We identified a gene in the CHAC critical region(9) and found 16 different mutations in individuals with chorea-acanthocytosis. CHAC encodes an evolutionarily conserved protein that is probably involved in protein sorting MH - Australia MH - Belgium MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 48 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1061-4036 UR - ISI:000169011800008 L2 - NEUROACANTHOCYTOSIS; LOCALIZATION; KEX2P; GENES SO - Nature Genetics 2001 ;28(2):119-120 4047 UI - 14365 AU - randa-Bricaire E AU - Kotta U AD - IPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, MexicoTallinn Tech Univ, Inst Cybernet, EE-12618 Tallinn, EstoniaAranda-Bricaire, E, IPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, Mexico TI - Generalized controlled invariance for discrete-time nonlinear systems with an application to the dynamic disturbance decoupling problem AB - In analogy with the continuous-time case, a general notion of controlled invariance with respect to quasi-static-state feedback is introduced for discrete-time nonlinear systems which incorporates the earlier definition of controlled invariance with respect to regular static-state feedback. This new notion is used to derive a geometric solution to the dynamic disturbance decoupling problem, The proposed solution is a natural generalization of the geometric solution to the static disturbance decoupling problem MH - Estonia MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000166732000022 L2 - controlled invariance;differential forms;disturbance decoupling;dynamic state feedback SO - Ieee Transactions on Automatic Control 2001 ;46(1):165-171 4048 UI - 12062 AU - Rangel-Flores H AU - Sanchez B AU - Mendoza-Duarte J AU - Barnabe C AU - Breniere FS AU - Ramos C AU - Espinoza B AD - Inst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Dept Arbovirus, Cuernavaca 62508, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoInst Seguridad Social Trabajadores Estado, Cuernavaca, Morelos, MexicoInst Rech Dev 5045, F-34032 Montpellier, FranceRangel-Flores, H, Inst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Dept Arbovirus, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Serologic and parasitologic demonstration of Trypanosoma cruzi infections in an urban area of central Mexico: Correlation with electrocardiographic alterations AB - Trypanosoma cruzi infection in central Mexico has not been fully documented, yet some data suggest its presence. In this work, sera from 211 subjects living in the state of Morelos and at risk of T. cruzi infection due to their living in contact with the vector were analyzed for the presence of antibodies to a total antigen extract of a Mexican isolate of T. cruzi. A seropositivity of 20% was demonstrated by both an enzyme-linked immunosorbent assay and Western blotting. Furthermore, parasites were isolated from five seropositive individuals, and these were genetically characterized as T. cruzi by multilocus enzyme electrophoresis. A case-control electrocardiographic study was conducted that included the seropositive individuals and twice as many seronegative controls living in the same area. A significant correlation was found between seropositivity and electrocardiographic alterations. These findings have important implications for perception of the prevalence of Chagas' disease in Mexico. Moreover, the presence of this disease in rural communities rapidly transforming into urban ones might have important epidemiologic consequences MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 15 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000173117100040 L2 - ANTIBODIES; DONORS SO - American Journal of Tropical Medicine and Hygiene 2001 ;65(6):887-895 4049 UI - 12545 AU - Rangel-Frausto MS AU - Ponce-de-Leon-Rosales S AU - Martinez-Abaroa C AU - Haslov K AD - Natl Inst Med Sci & Nutr, Div Hosp Epidemiol, Mexico City 14000, DF, MexicoMexican Inst Social Secur, Unit Hosp Epidemiol Res, Mexico City, DF, MexicoState Serum Inst, Anal & Control Dept, Copenhagen, DenmarkPonce-de-Leon-Rosales, S, Natl Inst Med Sci & Nutr, Div Hosp Epidemiol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Tuberculosis and tuberculin quality: Best intentions, misleading results AB - OBJECTIVE: To compare the performance of three purified protein derivative (PPD) formulations: Tubersol (Connaught); RT23, Statens Serum Institut (SSI); and R123, Mexico, tested in Mexican populations at low and high risk for tuberculosis (M). DESIGN: A double-blinded clinical trial. SETTING: A university hospital in Mexico City. PARTICIPANTS: The low-risk population was first or second-year medical students with no patient contact; the high-risk population was healthcare workers at a university hospital. METHODS: Each of the study subjects received the three different PPD, preparations. Risk factors for TB, including age, gender, occupation, bacille Calmette-Guerin (BCG) status, and TB exposure, were recorded. A 0.1-mL aliquot of each preparation was injected in the left and right forearms of volunteers using the Mantoux technique. Blind readings were done 48 to 72 hours later. Sensitivity and specificity were calculated at 10 mm of induration using Tubersol as the reference standard. The SSI tested the potency of the different PPD, preparations in previously sensitized guinea pigs. RESULTS: The low-risk population had a prevalence of positive PPD of 26%. In the low-risk population, RT23 prepared in Mexico, compared to the 5 TU of Tubersol, had a sensitivity of 51%, a specificity of 100%, a positive predictive value of 100% and a negative predictive value of 86%. The RT23 prepared at the SSI had a sensitivity of 69%, a specificity of 99%, a positive predictive value of 95%, and a negative predictive value of 90%. In the high-risk population, the prevalence of positive PPD was 57%. The RT23 prepared in Mexico had a sensitivity of 33%, a specificity of 100%, and a positive predictive value of 53%; the RT23 prepared at the SSI had a sensitivity of 91%, a specificity of 98%, a positive predictive value of 98%, and a negative predictive value of 89%. RT23 used in Mexico had a potency of only 23% of that of the control. There was no statistical association among those with a positive PPD, irrespective of previous BCG vaccination (relative risk, 0.97; 95% confidence interval, 0.76-1.3; P=.78). CONCLUSIONS: Healthcare workers had twice the prevalence of positive PPD compared to medical students. RT23 prepared in Mexico had a low sensitivity in both populations compared to 5 TU of Tubersol and RT23 prepared at the SSI. Previous BCG vaccination did not correlate with a positive PPD. Low potency of the RT23 preparation in Mexico was confirmed in guinea pigs. Best intentions in a TB program are not enough if they are not followed by high-quality control (Infect Control Hosp Epidemiol 2001;22:481-484) MH - Denmark MH - Mexico|Distrito Federal PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 0899-823X UR - ISI:000171826600011 L2 - SENSITIVITY SO - Infection Control and Hospital Epidemiology 2001 ;22(8):481-484 4050 UI - 11600 AU - Rangel R AU - Bartolo-Perez P AU - Gomez-Cortes A AU - Diaz G AU - Fuentes S AU - Galvan DH AD - Univ Michoacana SNH, Fac Ingn Quim, Morelia 58060, Michoacan, MexicoCINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yuc, VenezuelaUNAM, Inst Fis, Mexico City 01000, DF, MexicoUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoRangel, R, Univ Michoacana SNH, Fac Ingn Quim, Edificio K,Ciudad Univ, Morelia 58060, Michoacan, Mexico TI - Comparison between gamma-Bi2MoO6 and Bi2WO6 catalysts in the CO oxidation AB - Bismuth molybdate (gamma-Bi2MoO6) and bismuth tungstate (Bi2WO6) catalysts were prepared by solid-state reaction and their catalytic properties evaluated in the CO oxidation reaction. We characterize their structure by X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, and BET nitrogen absorption. X-ray diffraction analysis shows that both gamma-Bi2MoO6 and Bi2WO6 are structural analogs (SG P2(1)ab). Auger analysis shows that Bi2WO6 catalysts have more bismuth on the surface than gamma-Bi2MoO6, although both samples are bismuth deficient as compared to the stoichiometric compound. The results regarding catalytic activity show that Bi2WO6 prepared at 1073 K reaches total conversion of CO (100%) at a lower temperature when compared to gamma-Bi2MoO6. It indicates that Bi2WO6 is a potential candidate to be used as catalyst in the CO to CO2 oxidation MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Venezuela PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1064-7562 UR - ISI:000174389000006 L2 - Bi-Mo catalysts;Bi-W catalysts;CO oxidation;AES;BISMUTH MOLYBDATE; NEUTRON-DIFFRACTION; TRANSITION SO - Journal of Materials Synthesis and Processing 2001 ;9(4):207-212 4051 UI - 14399 AU - Rao KM AU - Pattabi M AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, MexicoMangalore Univ, Dept Mat Sci, Mangalagangothri 574199, Karnataka, IndiaPattabi, M, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Mexico TI - Effect of polymer-metal particle interaction on the structure of particulate silver films formed on softened polymer substrates AB - The results of the studies on the effect of polymer metal interaction on the structure of particulate silver films formed on softened polymer substrates are presented in this paper. Silver particulate films were deposited on three different softened polymer substrates namely, Polystyrene (PS), the poly(2-vinylpyridine) (P2VP), poly(4-vinylpyridine) (P4VP), by vacuum evaporation technique in a vacuum of 8 x10(-6) Torr at a constant deposition rate of 0.4 nm/sec. The in-situ electrical resistance measurements, scanning electron microscopy, optical absorption spectroscopy were performed on these films. It is found that apart from the deposition conditions, polymer-metal particle interaction plays a dominant role in determining the structure and thereby, properties of particulate silver films on softened polymers. Morphology of the film is very much sensitive to this interaction and the extent of the interaction is interpreted in terms of the presence and position of nitrogen atoms in the monomer repeat unit of the polymers MH - India MH - Mexico|Morelos PB - MONTREAL: ECOLE POLYTECHNIQUE MONTREAL RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1480-2422 UR - ISI:000166681200004 L2 - polymer-metal particle;particulate silver films;interaction;PS;P2VP;P4VP;substrates;ENHANCED RAMAN-SCATTERING; THIN-FILMS SO - Journal of New Materials for Electrochemical Systems 2001 ;4(1):11-15 4052 UI - 13256 AU - Rapp PE AU - Cellucci CJ AU - Korslund KE AU - Watanabe TAA AU - Jimenez-Montano MA AD - Med Coll Penn Hahnemann Univ, Dept Physiol & Pharmacol, Philadelphia, PA 19129, USAArthur P Noyes Clin Res Fdn, Norristown, PA, USAUrsinus Coll, Dept Phys, Collegeville, PA 19426, USAUniv Washington, Dept Psychiat & Behav Sci, Seattle, WA 98195, USAUniv Americas, Dept Math & Phys, Puebla, MexicoRapp, PE, Norristown State Hosp, Clin Res Ctr, Bldg 52,1001 Sterigere St, Norristown, PA 19401 USA TI - Effective normalization of complexity measurements for epoch length and sampling frequency AB - The algorithmic complexity of a symbol sequence is sensitive to the length of the message. Additionally, in those cases where the sequence is constructed by the symbolic reduction of an experimentally observed wave form, the corresponding value of algorithmic complexity is also sensitive to the sampling frequency. In this contribution, we present definitions of algorithmic redundancy that are sequence-sensitive generalizations of Shannon's original definition of information redundancy. In contrast with algorithmic complexity, we demonstrate that algorithmic redundancy is not sensitive to message length or to observation scale (sampling frequency) when stationary systems are examined MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169907300055 L2 - SEQUENCES SO - Physical Review e 2001 ;6401(1): 4053 UI - 13700 AU - Rashevsky A AU - Bonvicini V AU - Burger P AU - Cerello P AU - Crescio E AU - Giubellino P AU - Hernandez-Montoya R AU - Kolojvari A AU - Montano LM AU - Nouais D AU - Piemonte C AU - Tosello F AU - Vacchi A AD - Ist Nazl Fis Nucl, Sezione Trieste, Area Ric, I-34012 Trieste, ItalyCanberra Semicond NV, B-2250 Olen, BelgiumIst Nazl Fis Nucl, Sezione Torino, I-10125 Turin, ItalyCINVESTAV, Mexico City 14000, DF, MexicoSt Petersburg State Univ, St Petersburg, RussiaRashevsky, A, Ist Nazl Fis Nucl, Sezione Trieste, Area Ric, Palazzina L3,Padriciano 99, I-34012 Trieste, Italy TI - Characteristics of the ALICE Silicon Drift Detector AB - A Silicon Dr ift Detector (SDD) with an active area of 7.0 x 7.5 cm(2) has been designed, produced and tested for the ALICE Inner Tracking System. The development of the SDD has been focused on the capability of the detector to work without an external support to the integrated high-voltage divider. Several features have been implemented in the design in order to increase the robustness and the long-term electrical stability of the detector. One of the prototypes has been tested in a pion beam at the CERN SPS. Preliminary results on the position resolution are given. (C) 2001 Elsevier Science B.V, All rights reserved MH - Belgium MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000168567800037 L2 - INJECTORS SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2001 ;461(1-3):133-138 4054 UI - 13195 AU - Rasmussen A AU - Matsuura T AU - Ruano L AU - Yescas P AU - Ochoa A AU - Ashizawa T AU - Alonso E AD - Inst Nacl Neurol & Neurocirugia Manuel Velasco Su, Dept Neurogenet & Mol Biol, Mexico City 14269, DF, MexicoInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Dept Neurol, Mexico City 14269, DF, MexicoBaylor Coll Med, Dept Neurol, Houston, TX 77030, USAVet Affairs Med Ctr, Neurol Serv, Houston, TX 77030, USAAlonso, E, Inst Nacl Neurol & Neurocirugia Manuel Velasco Su, Dept Neurogenet & Mol Biol, Insurgentes Sur 3877,Col La Fama, Mexico City 14269, DF, Mexico TI - Clinical and genetic analysis of four Mexican families with spinocerebellar ataxia type 10 AB - Spinocerebellar ataxia type 10 (SCA10) is an autosomal dominant disorder caused by expansion of an unstable ATTCT repeat. SCA10 has been described as a pure cerebellar syndrome accompanied by seizures and has been recognized only in families of Mexican origin. We describe clinical and molecular findings of 18 patients in four Mexican families with SCA10. Affected individuals had an average age at onset of 26.7 years (range 14-44 years) and ATTCT repeats ranging from 920 to 4,140 repeats. We could not detect significant anticipation or correlation between repeat size and age at onset, probably due to the small sample size. In addition to pure cerebellar ataxia and seizures, patients often showed soft pyramidal signs, ocular dyskinesia, cognitive impairment, and/or behavioral disturbances. Brain magnetic resonance imaging showed predominant cerebellar atrophy, and nerve conduction studies indicated polyneuropathy in 66% of patients. One family showed hepatic, cardiac, and hematological. abnormalities in affected members. These findings suggest that a wide range of tissues may be affected in SCA10, including those outside of the cerebellum and cerebral cortex MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 28 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0364-5134 UR - ISI:000170243900014 L2 - DOMINANT CEREBELLAR-ATAXIA; TRINUCLEOTIDE REPEAT; CAG REPEAT; EXPANSION; CLONING; EPILEPSY; REVEALS; LOCUS; MAPS SO - Annals of Neurology 2001 ;50(2):234-239 4055 UI - 13083 AU - Rauscher J AU - Guillen RM AU - bores-Velasco M AU - Gonzalez G AU - Vostrowsky O AU - Bestmann HJ AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Erlangen Nurnberg, Inst Organ Chem, D-91054 Erlangen, GermanyAlbores-Velasco, M, Univ Nacl Autonoma Mexico, Fac Quim, Circuito Interior CU, Mexico City 04510, DF, Mexico TI - The repellence of Aristolochia aff. orbicularis roots against the corn borer Sitophilus zeamais AB - The repellence of Aristolochia aff orbicularis root, a native of Xochipala, Guerrero, Mexico, to the corn borer Sitophilus zeamais (Coleoptera) was investigated. The essential oil was isolated from the aromatic root and its repellent effect was assessed. About 40 components of the oil were identified using gas chromatography-mass spectrometry and other spectroscopic methods. The repellence of the roots, the oil and the chromatography fractions were also evaluated. Some fractions had a higher repellence than the total oil MH - Germany MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000170271900016 SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2001 ;56(7-8):575-580 4056 UI - 13969 AU - Ravel S AU - Monteny N AU - Olmos DV AU - Verdugo JE AU - Cuny G AD - IRD, CIRAD, Lab Rech & Coordinat Trypanosomoses, Programme Sante Anim, F-34398 Montpellier 5, FranceLab Estatal Salud Publ, Hermosillo 83260, Sonora, MexicoRavel, S, IRD, CIRAD, Lab Rech & Coordinat Trypanosomoses, Programme Sante Anim, TA-30G,Campus Int Baillarguet, F-34398 Montpellier 5, France TI - A preliminary study of the population genetics of Aedes aegypti (Diptera : Culicidae) from Mexico using microsatellite and AFLP markers AB - Dengue fever recently reemerged in the Americas. Because vaccines are still under development, dengue prevention depends entirely on vector control. Since Aedes aegypti (Linnaeus, 1762) is the principal vector of this arbovirus, knowledge of the genetic structure of the insect is therefore required to maintain effective vector control strategies and to estimate levels of gene flow from which movement can be inferred. This preliminary study uses microsatellite and amplified fragment length polymorphism (AFLP) markers, to provide insights into genetic diversity of A. aegypti populations from different districts of two towns, located in the north-west of Mexico. Hermosillo and Guaymas. Although the microsatellites used were found to display limited polymorphism, they allowed discrimination between mosquitoes from the northern and the southern districts of Hermosillo. Using AFLP markers, clustering of individuals from the same town and from the same district was observed. Data from microsatllite and AFLP markers analysis both suggest that reinvasion of A. aergypti probably occurs from Guaymas to Hermosillo. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000168013300005 L2 - Aedes aegypti;microsatellites;AFLP;dengue fever;DENGUE HEMORRHAGIC-FEVER; NATURAL-POPULATIONS; ANOPHELES MACULATUS; BOMBUS-TERRESTRIS; MALARIA VECTOR; RFLP MARKERS; WEST-AFRICA; POLYMORPHISM; DNA; DIFFERENTIATION SO - Acta Tropica 2001 ;78(3):241-250 4057 UI - 12562 AU - Rayces JL AU - Rosete-Aguilar M AD - JL Rayces Consulting Inc, Tucson, AZ 85718, USAUniv Nacl Autonoma Mexico, Ctr Instrumentos, Lab Opt Aplicada, Mexico City 04510, DF, MexicoRayces, JL, JL Rayces Consulting Inc, Tucson, AZ 85718, USA TI - Selection of glasses for achromatic doublets with reduced secondary spectrum. I. Tolerance conditions for secondary spectrum, spherochromatism, and fifth-order spherical aberration AB - We describe a way of selecting pairs of glasses for both thin cemented achromatic doublets and thin aplanatic achromatic doublets with a reduced secondary spectrum. By taking one pair of glasses at a time, we can compute and display the secondary spectrum in increasing value. The number of solutions based on the magnitude of the secondary spectrum alone is huge: 40,804 pairs. Some tests are applied at different stages of the design procedure to reduce the number of acceptable solutions. Aberrations that cannot be corrected, namely, spherochromatism and fifth-order spherical aberration, are further calculated to reduce drastically the number of acceptable solutions. To do this, we establish tolerance conditions based on the relationship between the Strehl intensity ratio and the rms wave-aberration error so that the rms wave error is minimized in the presence of the secondary spectrum, spherochromatism, and the fifth-order spherical aberration. (C) 2001 Optical Society of America MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000171853400015 L2 - DISPERSION; EQUATION SO - Applied Optics 2001 ;40(31):5663-5676 4058 UI - 13747 AU - Read RW AU - Holland GN AU - Rao NA AU - Tabbara KF AU - Ohno S AU - rellanes-Garcia L AU - Pivetti-Pezzi P AU - Tessler HH AU - Usui M AD - Univ So Calif, Keck Sch Med, Doheny Eye Inst, Los Angeles, CA 90089, USAUniv Calif Los Angeles, Sch Med, Jules Stein Eye Inst, Ocular Inflammatory Dis Ctr, Los Angeles, CA 90024, USAUniv Calif Los Angeles, Sch Med, Dept Ophthalmol, Los Angeles, CA 90024, USAKing Saud Univ, Coll Med, Dept Ophthalmol, Riyadh 11461, Saudi ArabiaYokohama City Univ, Dept Ophthalmol, Yokohama, Kanagawa 232, JapanUniv Mexico, Mexico City, DF, MexicoInst Oftalmol, Rome, ItalyUniv Illinois, Dept Ophthalmol, Chicago, IL 60680, USATokyo Med Univ, Dept Ophthalmol, Tokyo, JapanRao, NA, 1450 San Pablo St,DVRC 211, Los Angeles, CA 90033, USA TI - Revised diagnostic criteria for Vogt-Koyanagi-Harada disease: Report of an international committee on nomenclature AB - PURPOSE: To present revised criteria for the diagnosis of Vogt-Koyanagi-Harada disease, a chronic, bilateral, granulomatous ocular and multisystem inflammatory condition of unknown cause, METHODS: Diagnostic criteria and nomenclature were subjects of discussion at the First International Workshop on Vogt-Koyanagi-Harada Disease on October 19-21, 1999, at the University of California, Los Angeles, Conference Center, Lake Arrowhead, California. A committee appointed by the workshop participants was charged with drafting revised criteria for Vogt-Koyanagi-Harada disease, based on discussions held during the conference. This article is the consensus committee report. RESULTS: New criteria, taking into account the multisystem nature of Vogt-Koyanagi-Harada disease, with allowance for the different ocular findings present in the early and late stages of the disease, were formulated and agreed upon by the committee. These criteria are based on additional knowledge and experience of experts in the field and are believed to reflect disease features more fully than previously published criteria, CONCLUSIONS: The revised definition of Vogt-Koyanagi-Harada disease, with expanded diagnostic criteria, will facilitate performance of studies involving homogeneous populations of patients, at various stages of disease, that address unanswered questions regarding treatment and disease mechanisms, (C) 2001 by Elsevier Science Inc. All rights reserved MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Saudi Arabia MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 79 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000168609900014 L2 - SYMPATHETIC OPHTHALMIA; ASSOCIATION; ANTIGEN SO - American Journal of Ophthalmology 2001 ;131(5):647-652 4059 UI - 12485 AU - Readigos AAC AU - Vaillant L AU - Vigil-Galan O AU - Contreras-Puente G AD - Univ La Habana, Fac Quim, IMRE, Havana 10400, CubaUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoReadigos, AAC, Univ La Habana, Fac Quim, IMRE, Havana 10400, Cuba TI - Influence of the growth and post deposition process on the properties of CdS thin films prepared by chemical bath deposition AB - Studies of the properties of CBD-CdS thin films grown under variable conditions have been carried out. In particular, the influence of temperature, concentration of die reactants, application of a magnetic DC field and thermal annealing on the optical properties of the CDB-CdS has been studied. In this work, we are focusing our interest in the influence of the combination of the last two conditions, i.e., magnetic field application and annealing at 65, 75 and 85 degreesC and a fixed c(thio)c(Cd2+) (ratio = 1) on die band gap energy of CBD-CdS thin films for its use in solar cell as window material. The results about the influence of the substrate temperature and c(thio)/c(Cd2+) ratios in the final thickness of the layers is also presented MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900022 L2 - MAGNETIC-FIELD SO - Modern Physics Letters B 2001 ;15(17-19):659-662 4060 UI - 13033 AU - Rebollar CJ AU - Quintanar L AU - Castro RR AU - Day SM AU - Madrid J AU - Brune JN AU - Astiz L AU - Vernon F AD - Ctr Invest Cientif & Educac Super, Div Ciencias Tierra, Dept Sismol, CICESE, Ensenada, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USASan Diego State Univ, Dept Geol Sci, San Diego, CA 92182, USAUniv Nevada, Seismol Lab, Reno, NV 89557, USARebollar, CJ, Ctr Invest Cientif & Educac Super, Div Ciencias Tierra, Dept Sismol, CICESE, Ensenada, Baja California, Mexico TI - Source characteristics of a 5.5 magnitude earthquake that occurred in the transform fault system of the Delfin basin in the Gulf of California AB - Portable and permanent broadband seismic stations in the neighborhood of the Gulf of California recorded a moment magnitude M-w 5.5 event on 26 November 1997. This is the first time that a moderate event located in the Gulf of California extensional province was well recorded by local broadband seismic stations. The event was located at 29.754 degrees N and 113.708 degrees W and at a focal depth of 5.0 km in the southeastern end of the transform fault that connects the lower and upper Delfin basins. The hypocentral location and the results of the wave modeling indicate that this is a complex event that originated in the pull-apart Delfin basin. The focal mechanism estimated from first motions (phi = 310 degrees, delta = 83 degrees, lambda = 97 degrees) and body-wave modeling of P waves in the frequency band 0.05-0.5 Hz suggests that the rupture started with dip-slip (reverse faulting) motion and ended releasing the bulk of energy through strike-slip motion. Synthetics of surface waves in the frequency band 0.050. 1 Hz were also calculated using a triangular source-time function of 3 sec. The best match between the synthetics and observed surface waves recorded at 90 km from the epicenter was obtained using a fault geometry defined by a strike of 330 degrees +/- 15, dip 85 +/- 5, and slip of 165 degrees +/- 15. The spectral analysis of the Lg phase recorded at stations in the Peninsular Ranges gives a seismic moment of 1.28 X 10(17) N m (1.28 X 10(24) dyne cm), a source radius of 6.3 km and a stress drop of 0.22 MPa (2.2 bar). The source parameters inferred with S-wave spectra and the same model (Brune, 1970) give similar values MH - Mexico|Baja California MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000170654500012 L2 - BAJA-CALIFORNIA; ATTENUATION; WAVES; PLATE; LG SO - Bulletin of the Seismological Society of America 2001 ;91(4):781-791 4061 UI - 12305 AU - rechaga-Ocampo E AU - Saenz-Rivera J AU - Sarath G AU - Klucas RV AU - rredondo-Peter R AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoUniv Nebraska, George W Beadle Ctr, Dept Biochem, Lincoln, NE 68588, USAArredondo-Peter, R, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apartado Postal 565-A, Cuernavaca 62210, Morelos, Mexico TI - Cloning and expression analysis of hemoglobin genes from maize (Zea mays ssp mays) and teosinte (Zea mays ssp parviglumis) AB - With the exception of barley and rice, little is known about the existence of hemoglobins (Hbs) in cereals. This work reports the cloning and analysis of hb genes from maize (Zea mays ssp. mays) and teosinte (Zea mays ssp. parviglumis). Coding sequences of maize and teosinte hb genes (hbm and hbt, respectively) are highly similar to each other and are interrupted by three introns located at identical positions as other plant hb genes. Sequences of predicted Hbm and Hbt proteins are identical. The hydropathic profile of Hbm and Hbt is highly similar to that of rice Hb1, suggesting that Hbm, Hbt and Hb1 have the same tertiary structure and biochemical properties. Expression analysis showed that low levels of Hb transcripts, but considerable levels of Hb proteins exist in maize embryonic organs. No Hb transcripts and proteins were detected in teosinte embryonic organs. Low levels of Hb proteins, but no Hb transcripts, were detected in maize and teosinte vegetative organs. These observations suggest that the regulation of hb genes is different in maize and teosinte embryonic organs, and that the expression of hb genes is down- or up-regulated in maize and teosinte, respectively, from germination to vegetative growing. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0167-4781 UR - ISI:000172390600001 L2 - gene expression;hemoglobin;maize;non-symbiotic;teosinte;Zea;RECOMBINANT PROTEIN; ESCHERICHIA-COLI; PLANT; ORIGIN; LEGHEMOGLOBIN; EVOLUTION SO - Biochimica et Biophysica Acta-Gene Structure and Expression 2001 ;1522(1):1-8 4062 UI - 13857 AU - rechavaleta-Velasco ME AU - Guzman-Novoa E AD - Purdue Univ, Dept Entomol, W Lafayette, IN 47907, USAINIFAP, CENIFMA, Metepec, MexicoArechavaleta-Velasco, ME, Purdue Univ, Dept Entomol, W Lafayette, IN 47907 USA TI - Relative effect of four characteristics that restrain the population growth of the mite Varroa destructor in honey bee (Apis mellifera) colonies AB - This study was conducted to determine the existence of phenotypic and genotypic variation in the ability of honey bee colonies to restrain the population growth of the mite Varroa destructor Anderson and Trueman, and to asses the relative effect of four characteristics that may confer tolerance to honey bees toward the mite. Fifty-eight colonies infested with an equal number of mites were sampled monthly during six months to determine their levels of infestation on adult bees and in worker brood. At the end of this period, 16 colonies were selected to study the effect of grooming behavior, hygienic behavior, brood attractiveness, and host-induced non-reproduction. The infestation-levels in adult bees varied significantly between colonies (range: 6.6-44.7%), but no differences were found in the brood infestation levels. The variation between colonies was partially genetic in origin. Grooming behavior explained most of the variation (r(2) = 0.38). Negative correlations were found between the mite population growth and both the total number of mites and the number of injured mites collected from the bottom-boards (r = -0.65 and r = -0.76, respectively). Differences were found for hygienic behavior but the effect of this mechanism was not clear. No differences were found among colonies for brood attractiveness, or for the effect of the brood on the mite's reproduction MH - USA MH - Mexico|Estado De Mexico PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000168229000005 L2 - Apis mellifera;Varroa destructor;tolerance;mechanisms of resistance;Mexico;grooming behavior;hygienic behavior;JACOBSONI OUD; CERANA FABR; PARASITIC MITE; UNITED-STATES; SOUTH-AMERICA; WORKER BROOD; RESISTANCE; MESOSTIGMATA; OUDEMANS; BEHAVIOR SO - Apidologie 2001 ;32(2):157-174 4063 UI - 12559 AU - Recillas-Targa F AU - Razin SV AD - Univ Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Gene Biol, Lab Struct & Funct Org Chromosomes, Moscow 117334, RussiaRecillas-Targa, F, Univ Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Apartado Postal 70-242, Mexico City 04510, DF, Mexico TI - Chromatin domains and regulation of gene expression: Familiar and enigmatic clusters of chicken globin genes AB - Chicken domains of alpha- and beta -globin genes constitute traditional models to study possible relationships between the structural and functional organization of the eukaryotic genome. Recent evidence indicates that these two genomic domains differ significantly in genomic organization as well as in their mode of packaging into chromatin. In this review, we present a comparative analysis of the chicken alpha- and beta -globin gene clusters. The data are discussed in terms of the "domain hypothesis of the eukaryotic genome organization." On the basis of the results of our analysis, we present arguments for the existence of three distinct mechanisms that corroborate in the activation/repression of genomic domains. These mechanisms are (1) the relocation of genomic domains into nuclear compartments, (2) the long-term modifications of the mode of chromatin packaging within domains, and (3) the domain activation by continuous action of multiple transcription factors and remodeling complexes MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: BEGELL HOUSE INC RP - NOT IN FILE U3 - TC 17 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Review AV - English IS - 1045-4403 UR - ISI:000171759600012 L2 - chromatin domain;domain boundary;insulator;locus control regions;chicken globin genes;nuclear compartments;LOCUS-CONTROL REGION; CPG-BINDING-PROTEIN; HISTONE DEACETYLASE COMPLEX; ENHANCER-BLOCKING ACTIVITY; I-HYPERSENSITIVE SITES; ALPHA-GLOBIN; BETA-GLOBIN; DEVELOPMENTAL REGULATION; ATTACHMENT REGION; DNA METHYLATION SO - Critical Reviews in Eukaryotic Gene Expression 2001 ;11(1-3):227-242 4064 UI - 11729 AU - Recio R AU - Robbins WA AU - Ocampo-Gomez G AU - Borja-Aburto V AU - Moran-Martinez J AU - Froines JR AU - Hernandez RMG AU - Cebrian ME AD - CINVESTAV, Ctr Invest & Estudios Avanzados, Secc Toxicol, Mexico City 07300, DF, MexicoUniv Autonoma Coahuila, Fac Med Torreon, Ctr Invest Biomed, Dept Reprod Biol, Torreon, Coahuila, MexicoUniv Calif Los Angeles, Ctr Environm & Occupat Hlth, Los Angeles, CA, USASecretaria Salud & Asistencia, Ctr Nacl Salud Ambiental, Mexico City, DF, MexicoCebrian, ME, CINVESTAV, Ctr Invest & Estudios Avanzados, Secc Toxicol, POB 14-740,Ave Inst Politecn Nacl 2508, Mexico City 07300, DF, Mexico TI - Organophosphorous pesticide exposure increases the frequency of sperm sex null aneuploidy AB - It has been estimated that 4 of 1,000 live births and 35% of spontaneous abortions are aneuploid and that an important proportion of embryo and newborn aneuploidy is of paternal origin. Exposure to organophosphorous pesticides (OP) has been associated with sperm hyperploidy/polyploidy. Therefore, we aimed to assess the frequency of sperm aneuploidy (X, Y, and 18) and its relationship with urinary OP metabolites in agricultural workers. We performed multicolor fluorescence in situ hybridization on samples from nine men obtained before and during the pesticide spraying season to assess sperm aneuploidy. We measured urinary OP metabolite levels by gas-liquid chromatography. Aneuploidies were found in 0.67% of total sperm nuclei. The most frequent aneuploidy was the lack of a sexual chromosome or sex null (0.19%), followed by XY18 (0.15%) and XY18-18 (0.06%). OP metabolites detected at higher, concentrations were dimethylthiophosphate, dimethyldithiophosphate, and diethylphosphate (DEP). There were no, differences in average aneuploidy frequency or urinary metabolite levels between samples collected before and after exposure. However, Poisson regression analysis adjusted for age, alcohol intake, and sperm concentration showed significant associations between OP metabolite concentrations and increased frequency of sperm aneuploidies. The association was more evident between DEP and sex null, and the risk increased further during the spraying season. Thus, OP exposure could interfere with sperm chromosome segregation and increase the risk for genetic syndromes, such as Turner's. Further studies are required to assess the prevalence of spontaneous abortions, birth defects, and genetic syndromes in agricultural communities MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 24 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000174136500031 L2 - organophosphorous pesticides;sex null;sperm aneuploidy;Turner syndrome;IN-SITU HYBRIDIZATION; CHROMOSOMAL-ABNORMALITIES; MULTICOLOR FISH; INFERTILE MEN; CHEMOTHERAPY; SPERMATOZOA; NONDISJUNCTION; COMPLEMENTS; SMOKING; DISOMY SO - Environmental Health Perspectives 2001 ;109(12):1237-1240 4065 UI - 12162 AU - Redon R AU - Cramer R AU - Bernes S AU - Morales D AU - Torrens H AD - Univ Nacl Autonoma Mexico, Fac Quim, DEPg, Mexico City 04510, DF, MexicoUniv Hawaii Manoa, Dept Chem, Honolulu, HI 96822, USAUniv Autonoma Puebla, IC, Ctr Quim, Puebla 72570, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoTorrens, H, Univ Nacl Autonoma Mexico, Fac Quim, DEPg, Cd Univ, Mexico City 04510, DF, Mexico TI - Allyl-palladium compounds with fluorinated benzenethiolate ligands. X-ray crystal structure of [(eta(3)-C3H5)Pd(mu-SC6H4F-4)(2)Pd(eta(3)-C3H5)] AB - Treatment of the di-lt-chloride allyl-palladium complex [(eta (3)-C3H5)Pd(mu -Cl)(2)Pd(eta (3)-C3H5)] with Pb(SR)(2) in acetone affords dinuclear fluorothiolate bridged complexes of the type [(eta (3)-C3H5)Pd(mu -SR)(2)Pd(eta (3)-C3H5)] (R = C6F5, 1; C6HF4-4, 2: C6H4F-2, 3; C6H4F-3, 4 and C6H4F-4, 5). Complex 1 reacts with pares-substituted phosphines P(C6H4X-4)(3) to give the mononuclear perfluorobenzenethiolate complexes [Pd(SC6F5)(eta (3)-C3H5)(P(C6H4X-4)(3))] (X = F, 6; CF3, 7; OCH3, 8 and CH3, 9). The single crystal X-ray diffraction structure of [(eta (3)-C3H5)Pd(mu -SC6H4F-4)(2)Pd(eta (3)-C3H5)] (5) has been resolved. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000172746500011 L2 - palladium;fluorothiolate;allyl;NMR spectroscopy;crystal structures;ALLYLPALLADIUM COMPLEXES; NUCLEOPHILIC-ATTACK; CYCLOPROPANES; DERIVATIVES; ALLYLNICKEL; CATALYSIS; ALCOHOLS; CARBON SO - Polyhedron 2001 ;20(26-27):3119-3125 4066 UI - 13624 AU - Reguera E AU - Gomez A AU - Balmaseda J AU - Contreras G AU - Escamilla A AD - IPN, CICATA, Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoUniv Havana, Inst Mat & Reagents, Havana 10400, CubaIPN, Sch Phys & Mat, Mexico City 07738, DF, MexicoReguera, E, IPN, CICATA, Ctr Appl Sci & Adv Technol, Legaria 694, Mexico City 11500, DF, Mexico TI - Structural characterization of cadmium hexacyanometallates(II) and related complexes AB - Cadmium hexacyanometallates (II) crystallize in the same monoclinic cell (space group C-2h(5) - P2(1/n)) reported for the analogs of manganous complexes. In that monoclinic framework, two outer cations (M = Mn2+ or Cd2+) of neighboring structural units M-2[L-II(CN)(6)], (L = Fe-II, Ru-II, Os-II), are linked by two common water molecules. On heating above 100 degreesC, these water bridges are removed. In dehydrated complexes, the outer cation (M) remains linked to only three CN ligands. The loss of aquo-ligands induces a remarkable pi -back donation from the inner cation (L) to CN ligands, which was studied using IR, Raman, and Mossbauer spectroscopies MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Crystallography U5 - J;Article AV - English IS - 1040-0400 UR - ISI:000168764000006 L2 - hexacyanometallate;IR spectra;Raman spectra;Mossbauer spectra;X-ray diffraction;PRUSSIAN BLUE; OZONE; FERROCYANIDES; SPECTROSCOPY; FERRICYANIDE; WATER SO - Structural Chemistry 2001 ;12(1):59-66 4067 UI - 12626 AU - Reid DG AU - Kaiser KL AD - Nat Hist Museum, Dept Zool, London SW7 5BD, EnglandSanta Barbara Museum Nat Hist, Santa Barbara, CA 93105, USAKaiser, KL, Paseo Conchas Chinas 115, Puerto Vallarta 48300, Jalisco, Mexico TI - Three new records of Indo-West Pacific Littorinidae (Gastropoda) in the Tropical Eastern Pacific AB - Three species of Littorinidae that are widespread in the Indo-West Pacific (IWP) region are recorded from the Tropical Eastern Pacific (TEP) for the first time: Littoraria undulata (Gray, 1839) on Isla del Coco, L. coccinea (Gmelin, 1791) on Isla del Coco and Clipperton Atoll. and Peasiella conoidalis (Pease. 1868) on the mainland of Costa Rica. These are briefly described and figured. It is suggested that these may have been transported to the TEP as pelagic eggs or larvae, carried on the North Equatorial Countercurrent, perhaps during the enhanced flow characteristic of El Nino events. Records of IWP mollusks in the TEP are reviewed and reasons for the general lack of established populations of these species are discussed MH - United Kingdom MH - Mexico|Jalisco MH - USA PB - SANTA BARBARA: CALIF MALACOZOOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0042-3211 UR - ISI:000171496200006 L2 - LONG-DISTANCE DISPERSAL; CLIPPERTON ATOLL; PEASIELLA NEVILL; 1885 GASTROPODA; OCEAN; MOLLUSCA; INVERTEBRATES; ZOOGEOGRAPHY; BIOGEOGRAPHY; BARRIER SO - Veliger 2001 ;44(4):381-388 4068 UI - 13843 AU - Reid ED AU - Lopez P AU - Galaviz IA AU - Isoard F AU - Rosado JL AU - Allen LH AD - Univ Calif Davis, Dept Nutr, Davis, CA 95616, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - Hematological and biochemical responses of rural Mexican preschoolers to iron alone or iron plus micronutrients MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167454200106 SO - Faseb Journal 2001 ;15(5):A731-A731 4069 UI - 12164 AU - Reigada R AU - Sarmiento A AU - Lindenberg K AD - Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Matemat, Chamilpa 62200, Morelos, MexicoUniv Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAReigada, R, Univ Barcelona, Dept Quim Fis, Ave Diagonal 647, E-08028 Barcelona, Spain TI - Energy relaxation in nonlinear one-dimensional lattices AB - We Study energy relaxation in thermalized one-dimensional nonlinear arrays of the Fermi-Pasta-Ulam type. The ends of the thermalized systems are placed in contact with a zero-temperature reservoir via damping forces. Harmonic arrays relax by sequential phonon decay into the cold reservoir. the lower-frequency modes relaxing first. The relaxation pathway for purely anharmonic arrays involves the degradation of higher-energy nonlinear modes into lower-energy ones. The lowest-energy modes are absorbed by the cold reservoir. but a small amount of energy is persistently left behind in the array in the form of almost stationary low-frequency localized modes. Arrays with interactions that contain both a harmonic and an anharmonic contribution exhibit behavior that involve, the interplay of phonon modes and breather modes. At long times re laxation is extremely slow due to the spontaneous appearance and persistence of energetic high-frequency stationary breathers. Breather behavior is further ascertained by explicitly injecting a localized excitation into the thermalized arrays and observing the relaxation behavior MH - Mexico|Morelos MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000172726400073 L2 - INTRINSIC LOCALIZED MODES; PASTA-ULAM CHAIN; ANHARMONIC LATTICES; VIBRATIONAL-MODES; BREATHERS; SOLITONS; EXISTENCE; SYSTEMS; EQUIPARTITION; OSCILLATORS SO - Physical Review e 2001 ;64(6): 4070 UI - 13455 AU - Reigada R AU - Sarmiento A AU - Lindenberg K AD - Univ Calif San Diego, Dept Chem & Biochem 0340, La Jolla, CA 92093, USAUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainUNAM, Inst Matemat, Chamilpa 62200, Morelos, MexicoReigada, R, Univ Calif San Diego, Dept Chem & Biochem 0340, La Jolla, CA 92093 USA TI - Thermal resonance in signal transmission AB - We use temperature tuning to control signal propagation in simple one-dimensional arrays of masses connected by hard anharmonic springs and with no local potentials. In our numerical model a sustained signal is applied at one site of a chain immersed in a thermal environment and the signal-to-noise ratio is measured at each oscillator. We show that raising the temperature can lead to enhanced signal propagation along the chain, resulting in thermal resonance effects akin to the resonance observed in arrays of bistable systems MH - USA MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169285300024 L2 - ENHANCED STOCHASTIC RESONANCE; SPATIOTEMPORAL SYNCHRONIZATION; CHEMICAL-REACTION; BISTABLE SYSTEMS; EXCITABLE MEDIA; NOISE; PROPAGATION; LOCALIZATION; EQUILIBRIUM; OSCILLATORS SO - Physical Review e 2001 ;6306(6): 4071 UI - 13266 AU - Reimer O AU - Brazier KTS AU - Carraminana A AU - Kanbach G AU - Nolan PL AU - Thompson DJ AD - NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Durham, Durham DH1 3LE, EnglandInst Nacl Astrofis Opt & Elect, Tonantzintla, MexicoMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyStanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305, USAReimer, O, NASA, Goddard Space Flight Ctr, Code 661, Greenbelt, MD 20771 USA TI - Multifrequency studies of the enigmatic gamma-ray source 3EG: J1835+5918 AB - The EGRET telescope aboard the NASA Compton Gamma-Ray Observatory (CGRO) has repeatedly detected 3EG J1835+5918, a bright and steady source of high-energy gamma-ray emission which has not yet been identified. The absence of any likely counterpart for a bright gamma-ray source located 25 degrees off the Galactic plane initiated several attempts of deep observations at other wavelengths. We report on counterparts in X-rays on a basis of a 60-ks ROSAT HRI image. In older to conclude on the plausibility of the X-ray counterparts, we reanalysed data from EGRET at energies above 100 MeV and above 1 GeV, including data up to CGRO observation cycle 7. The gamma-ray sauce location represents the latest and probably the final positional assessment based on EGRET data. We especially address the question of flux and spectral variability, here discussed using the largest and most homogeneous data set available at high-energy gamma-rays for many years. The results from X-ray and gamma-ray observations were used in a follow-up optical identification campaign at the 2.2-m Guillermo Hare Telescope at Cananea, Mexico. VRI imaging. has been performed at the positions of all of the X-ray counterpart candidates, and spectra were taken where applicable. The results of the multifrequency identification campaign toward this enigmatic unidentified gamma-ray source are given, especially on the one object which might be associated with the gamma-ray source 3EG J1835+5918. This object has the characteristics of an isolated neutron star and possibly of a radio-quiet pulsar MH - USA MH - United Kingdom MH - Germany MH - Mexico|Puebla PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000169890700028 L2 - gamma-rays : observations;X-rays : stars;PULSAR PSR J0218+4232; NEUTRON-STARS; POINT SOURCES; EMISSION; EGRET; BLAZARS SO - Monthly Notices of the Royal Astronomical Society 2001 ;324(3):772-780 4072 UI - 12331 AU - Reinharz D AU - Saldana VRZ AU - Follador W AU - Asche C AD - CHUQ, Hopt St Francois Assise, Quebec City, PQ G1L 3L5, CanadaNatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoUniv Fed Rio de Janeiro, Hosp Univ Clementino Frago Filho, Rio De Janeiro, BrazilSimon Fraser Univ, Gerontol Res Ctr, Burnaby, BC V5A 1S6, CanadaReinharz, D, CHUQ, Hopt St Francois Assise, Local D1-724,10 Rue Espinay, Quebec City, PQ G1L 3L5, Canada TI - Pharmacoeconomic component of a clinical trial conducted in Latin America - Conceptual and empirical considerations AB - Background: Although pharmacoeconomic studies constitute a valuable tool for better managing drug consumption, the conditions under which such studies would be performed in Latin American countries have not been explored. Objectives: The aim of this paper is to evaluate the potential advantages of and pitfalls in doing pharmacoeconomic research in Latin America and to propose avenues to facilitate the development of this field in the region. Methods: The Canadian guidelines for the economic evaluation of pharmaceuticals served as a structured framework to assess, both prospectively and retrospectively, the conditions under which the pharmacoeconomic component of a clinical trial held in Mexico and Brazil would be and actually was conducted. Results: The conditions under which pharmacoeconomic evaluations are conducted must be improved if studies are to contribute to the better management of scarce resources across the entire health care system. Conclusions: The creation of a public funding agency, the reappraisal of administrative data as a management tool in both the public and the private sectors, and the establishment of national guidelines should be considered within the framework of reforms aimed at allowing healthcare systems to meet their objectives of efficiency and equity MH - Brazil MH - Canada MH - Mexico|Morelos PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;Public, Environmental & Occupational Health;Medical Informatics U5 - J;Article AV - English IS - 0266-4623 UR - ISI:000172329500011 L2 - pharmacoeconomics;Latin America;MANAGED CARE SO - International Journal of Technology Assessment in Health Care 2001 ;17(4):571-578 4073 UI - 13520 AU - Ren J AU - Song S AU - Lopez-Valdivieso A AU - Shen J AU - Lu S AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoNanjing Univ, Ctr Res Surfaces & Interfaces, Nanjing 210093, Peoples R ChinaUniv Sci & Technol Beijing, Resources Engn Sch, Beijing 100083, Peoples R ChinaSong, S, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Dispersion of silica fines in water-ethanol suspensions AB - The dispersion of silica fines in water-ethanol suspensions has been studied through the measurement of settling efficiency, wetting rate, zeta potential, and viscosity. The measurements were performed on two silica samples with mean volumetric diameters of 5.02 and 0.272 mum at different fractions of ethanol in water-ethanol suspensions. The results have demonstrated that the dispersion stability of the silica suspensions increased as the fraction of ethanol increased and reached to maximum at the fraction of 50%, followed by a decline. The stability was stronger in a pure ethanol suspension than in a pure water suspension. It was observed that the stability closely correlated with the lyophilicity of the particles, but was not predominated by the surface charge of the particles as predicted by the DLVO theory. Viscosity measurements have been used to estimate the solvation film thickness on silica particles immersed in water-ethanol suspensions, on the basis of Einstein's theory of the viscosity of dispersions. It was found that the solvation film thickness on silica fines in a water-ethanol(1:1) suspension is about double that in a pure water suspension and about 1.4-fold that in a pure ethanol suspension, respectively, which well explains the dispersion behaviors of the silica fines in the water-ethanol suspensions because a thicker solvation film will cause a stronger disjoining pressure to prevent the proximity of the particles. (C) 2001 Academic Press MH - Mexico|San Luis Potosi MH - Peoples R China PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000169236600008 L2 - stability;silica fines;water-ethanol suspensions;solvation film thickness;viscosity;lyophilicity;HYDRATION FORCES; SURFACE FORCES; MICA SURFACES; STABILITY; MICROSCOPE; COLLOIDS; MEDIA; DLVO SO - Journal of Colloid and Interface Science 2001 ;238(2):279-284 4074 UI - 12429 AU - Rendon B AU - Nunez-Farfan J AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USANunez-Farfan, J, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Apartado Postal 70-275, Mexico City 04510, DF, Mexico TI - Population differentiation and phenotypic plasticity of wild and agrestal populations of the annual Anoda cristata (Malvaceae) growing in two contrasting habitats AB - Anoda cristata is a widely distributed annual weed in Mexico, which grows as agrestal or naturally in disturbed and undisturbed vegetation, respectively. Plants of this species are tolerated in orchards and corn-bean fields by Mexican ethnic groups of Central Mexico. Leaves of the plants are used as a food source, and occasionally seeds are sown in orchards. Because Mexicans have used Anoda cristata for a long time, it is possible that ecological and morphological characteristics of managed populations differ from those of wild populations. In this study, we analyzed phenotypic responses of two populations of A. cristata (wild and agrestal) growing in two habitats (forest and cultivated field) comparing survivorship, and life history traits. Natural progenies from wild and agrestal populations of A. cristata were transplanted into a cultivated field and in the understory of a pine forest in a reciprocal transplant experiment. Results showed that the habitat of transplant and the origin of populations had significant effect on all plant characters measured (growth, phenology, and biomass allocation), but the habitat x origin interaction was non-significant. In general, plants from the agrestal population grew faster, reproduced earlier, and allocated more biomass to reproduction, than plants from the wild population. Similarly, significant effects of habitat and origin on plant survivorship were detected, but the origin of populations explained the largest proportion of variance in plant survival. Most traits were phenotypically plastic but there were no differences in the magnitude or direction of the response between populations. In contrast both populations showed differentiation for most character mean values. Population differentiation is possibly the result of genetic differences driven by processes other than incipient domestication MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1385-0237 UR - ISI:000172074900009 L2 - Anoda cristata;Mexico;phenotypic plasticity;plant domestication;plant survival;population differentiation;LIFE-HISTORY TRAITS; GENETIC DIFFERENTIATION; ECOLOGICAL GENETICS; PHLOX-DRUMMONDII; PLANTS; DEMOGRAPHY; LANCEOLATA; ADAPTATION; EVOLUTION SO - Plant Ecology 2001 ;156(2):205-213 4075 UI - 14323 AU - Renton K AD - Univ Kent, Durrell Inst Conservat & Ecol, Canterbury CT2 7NS, Kent, EnglandRenton, K, Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, Aptdo Postal 21, San Patricio 48980, Jalisco, Mexico TI - Lilac-crowned parrot diet and food resource availability: Resource tracking by a parrot seed predator AB - The pattern of food resource availability and use by Lilac-crowned Parrots (Amazona finschi) was evaluated in tropical dry forest of the Reserva de la Biosfera Chamela-Cuixmala, western Mexico. Monthly fruiting phenology transects were conducted throughout the year in deciduous and semi-deciduous forest to determine temporal and spatial variability in resource abundance. Resource use by parrots was evaluated through observations of diet and habitat use. There was significant temporal and spatial variability in food resource abundance, with semi-deciduous forest providing greater food resources for parrots during the dry season, whereas food resource abundance increased in deciduous forest during the rainy season. The critical period of food resource scarcity occurred during May-June at the end of the long dry season. Lilac-crowned Parrots were pre-dispersal seed predators, and exhibited high flexibility in diet, incorporating dietary switching, as well as niche-breadth contraction and expansion, which corresponded with temporal variations in food resource availability. There was low overlap in parrot diets between seasons, with parrots exhibiting a narrow food niche-breadth during the late dry season when resource availability declined. Parrots also demonstrated spatial variation in habitat use, corresponding to fluctuations in the availability of food resources in different habitats. This flexibility in foraging enables parrots to closely track and exploit seed resources which exhibit high temporal and spatial variability in abundance MH - United Kingdom MH - Mexico|Jalisco PB - LAWRENCE: COOPER ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Ornithology U5 - J;Article AV - English IS - 0010-5422 UR - ISI:000166877800007 L2 - Amazona finschi;deciduous forest;habitat use;niche breadth;plant phenology;seasonality;TEMPORAL VARIATION; TROPICAL FORESTS; FRUIT ABUNDANCE; GROUND FINCHES; COSTA-RICA; TREES; CONSERVATION; ORGANIZATION; DIVERSITY; GRADIENT SO - Condor 2001 ;103(1):62-69 4076 UI - 12978 AU - Restuccia G AU - Villarreal RH AD - Univ Messina, Dipartimento Matemat, I-98166 Messina, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoRestuccia, G, Univ Messina, Dipartimento Matemat, Contrada Papardo,Salita Sperone N-31, I-98166 Messina, Italy TI - On the normality of monomial ideals of mixed products AB - Let R = K[x, y] be a polynomial ring in two disjoint sets of variables x, y over a field K. We study ideals of mixed products L = I(k)J(r) + I(s)J(t) such that k + r = s + t, where I-k (resp. J(r)) denotes the ideal of R generated by the square-free monomials of degree k (resp. r) in the x (resp. y) variables. Our main result is a characterization of when a given ideal L of mixed products is normal MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000170674300022 SO - Communications in Algebra 2001 ;29(8):3571-3580 4077 UI - 12967 AU - Reszko-Zygmunt J AU - Pizio O AU - Rzysko W AU - Sokolowski S AU - Sokolowska Z AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Dept Modelling & Physciochem Proc, PL-20031 Lublin, PolandPolish Acad Sci, Inst Agrophys, PL-20290 Lublin, PolandReszko-Zygmunt, J, Marie Curie Sklodowska Univ, Dept Modelling & Physciochem Proc, PL-20031 Lublin, Poland TI - Capillary condensation in pores with energetically heterogeneous walls: Density functional versus Monte Carlo calculations AB - We investigate adsorption of a Lennard-Jones fluid in slit-like pores with energetically heterogeneous walls by using Grand Canonical Monte Carlo simulations and a density functional approach. The model of a fluid-wall potential is qualitatively similar to that invoked by Rocken et al. (J. Chem. Phys. 108, 8089, (1999); i.e., it consists of a homogeneous part that varies in the direction perpendicular to the wall and a periodic part, varying also in one direction parallel to the wall, but in contrast to the above mentioned work, both parts of the fluid-wall potential are modeled by Lennard-Jones (9, 3) type functions. The structure of the adsorbed film is characterized by local densities. We evaluate the phase diagrams for several systems characterized by different corrugation of the adsorbing potential and discuss the discrepancies between theoretical predictions and computer simulations. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Poland PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000170729600018 L2 - computer simulations;adsorption;energetic heterogeneity;phase transitions;SLIT-LIKE PORES; ADSORPTION; SURFACES; TRANSITIONS SO - Journal of Colloid and Interface Science 2001 ;241(1):169-177 4078 UI - 12639 AU - Reyes-Esqueda J AU - Darracq B AU - Garcia-Macedo J AU - Canva M AU - Blanchard-Desce M AU - Chaput F AU - Lahlil K AU - Boilot JP AU - Brun A AU - Levy Y AD - Univ Nacl Autonoma Mexico, Inst Fis, Dept Estado Solido, Mexico City 04510, DF, MexicoUniv Paris 11, CNRS, UMR 8501, Inst Opt,Lab Charles Fabry, F-91403 Orsay, FranceUniv Rennes 1, UMR Synth & Electrosynth Organ 6510, F-35042 Rennes, FranceEcole Polytech, CNRS, UMR 7643, Phys Mat Condensee Lab, F-91128 Palaiseau, FranceReyes-Esqueda, J, Univ Nacl Autonoma Mexico, Inst Fis, Dept Estado Solido, Ciudad Univ,Del Coyoacan, Mexico City 04510, DF, Mexico TI - Effect of chromophore-chromophore electrostatic interactions in the NLO response of functionalized organic-in organic sol-gel materials AB - In the last years, important non-linear optical (NLO) results on sol-gel and polymeric materials have been reported, with values comparable to those found in crystals. These new materials contain push-pull chromophores either incorporated as guest in a high T-g polymeric matrix (doped polymers) or grafted onto the polymeric matrix. These systems present several advantages, however they require significant improvement at the molecular level-by designing optimized chromophores with very large molecular figure of merit, specific to each application targeted. Besides, it was recently stated in polymers that the chromophore-chromophore electrostatic interactions, which are dependent of chromophore concentration, have a strong effect into their NLO properties. This has not been explored at all in sol-gel systems. In this work, the sol-gel route was used to prepare hybrid organic-inorganic thin films with different NLO chromophores grafted into the skeleton matrix. Combining a molecular engineering strategy for getting a larger molecular figure of merit and by controlling the intermolecular dipole-dipole interactions through both: the tuning of the push-pull chromophore concentration and the control of tetraethoxysilane concentration, we have obtained a coefficient around 15 pm/V at 633 nm for the classical DR1 azo-chromophore and a r(33) around 50 pm/V at 831 nm for a new optimized chromophore structure. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000171571900030 L2 - chromophore;sol-gel;doped polymer;electro-optic;absorption;integrated optics;POLYMERS; MODULATORS SO - Optics Communications 2001 ;198(1-3):207-215 4079 UI - 13553 AU - Reyes-Villanueva F AU - Becnel JJ AU - Butler JF AD - Univ Florida, Dept Entomol & Nematol, Gainesville, FL 32611, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Invertebrate Zool, San Nicolas Garza 66450, NL, MexicoARS, Ctr Med Agr & Vet Entomol, USDA, Gainesville, FL 32608, USAReyes-Villanueva, F, Univ Florida, Dept Entomol & Nematol, Bldg 970,Hull Rd,POB 110620, Gainesville, FL 32611 USA TI - Morphological traits for distinguishing extracellular gamonts of Ascogregarina culicis and Ascogregarina taiwanensis in Aedes aegypti and Aedes albopictus MH - USA MH - Mexico|Nuevo Leon PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000169033400010 L2 - LECUDINIDAE; APICOMPLEXA; DIPTERA; FLORIDA; PATHOGENICITY; MOSQUITOS SO - Journal of Invertebrate Pathology 2001 ;77(3):227-229 4080 UI - 12840 AU - Reyes F AU - Luyben WL AD - Lehigh Univ, Dept Chem Engn, Bethlehem, PA 18015, USAInst Mexicano Petr, Programa Simulat Mol, Mexico City 07730, DF, MexicoLuyben, WL, Lehigh Univ, Dept Chem Engn, Bethlehem, PA 18015, USA TI - Design and control of tubular reactor systems with both gas and liquid recycles AB - Previous studies of tubular reactor systems have explored flowsheets with either a gas recycle or a liquid recycle. In this paper, we extend this work to consider a flowsheet with two recycle streams: a large gas recycle from a separator drum and a small liquid recycle from a distillation column. Both the steady-state economics and the dynamic controllability of this dual-recycle system are compared with those of single-recycle processes. Three kinetic cases are considered: an irreversible reaction with moderate activation energy, an irreversible reaction with high activation energy, and a reversible reaction. Results demonstrate that the dual-recycle flowsheet is less expensive than the liquid-recycle system for the irreversible reaction case, particularly for the high activation energy where the total annual cost is 50% less. In the reversible reaction case, the liquid-recycle system is less expensive, because of the need for a high-purity recycle. Control structures are developed for all three flowsheets. that provide effective regulatory control for large disturbances MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000171079300008 SO - Industrial & Engineering Chemistry Research 2001 ;40(19):4089-4101 4081 UI - 13025 AU - Reyes F AU - Luyben WL AD - Lehigh Univ, Dept Chem Engn, Bethlehem, PA 18015, USAInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoLuyben, WL, Lehigh Univ, Dept Chem Engn, Bethlehem, PA 18015, USA TI - Design and control of a gas-phase adiabatic tubular reactor process with liquid recycle AB - Previous studies have explored the design and control of processes with gas-phase adiabatic tubular reactors that feature a gas recycle and a simple separation section consisting of a single ideal separator vessel. The gas recycle leads to high compressor capital and operating costs. This paper extends this work to the case in which a distillation column is required in the separation section and the recycle stream is liquid. The liquid recycle means that there are no compressor costs to counterbalance the reactor costs. However, there are large capital and energy costs associated with the vaporization/condensation of the recycle stream. For the numerical case studied, the liquid recycle process is more expensive than the gas recycle process, and it is more difficult to control. The basic reaction is A + B --> C. Three reaction systems are considered: case 1 (irreversible with moderate activation energy), case 2 (irreversible with high activation energy), and case 3 (reversible). The optimum steady-state designs for cases 1 and 3 can be effectively controlled by the same control structure. The optimum steady-state design for case 2 cannot be controlled, and the process has to be redesigned to prevent reactor runaways. The concentration of one of the reactants has to be reduced so that it becomes a limiting reactant, thus providing self-regulation. This self-regulation in the liquid recycle process is not as effective as that in the gas recycle system because of the slower changes in concentrations due to the larger holdups of material in the liquid phase MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000170573600006 L2 - EXOTHERMIC REACTIONS SO - Industrial & Engineering Chemistry Research 2001 ;40(17):3762-3774 4082 UI - 14190 AU - Reyes LH AU - Medina IS AU - Mendoza RN AU - Vazquez JR AU - Rodriguez MA AU - Guibal E AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36040, MexicoCtr Invest & Desarrollo Tecnol SA CV, Mazatlan 52000, Edo Mexico, MexicoEcole Mines dAles, Lab Genie Environm Ind, F-30319 Ales, FranceMendoza, RN, Univ Guanajuato, Inst Invest Cient, Cerro de la Venada S-N,Pueblito de Rocha, Guanajuato 36040, Mexico TI - Extraction of cadmium from phosphoric acid using resins impregnated with organophosphorus extractants AB - In the first part of this work, Amberlite XAD-7, impregnated with Cyanex 301, is selected among several supports and organophosphorus extractants for its high affinity for cadmium in phosphoric acid solutions. Initially, the work focuses on the study of cadmium extraction and stripping, in both batch and column systems, using synthetic solutions. This extraction system can be efficiently used for the recovery of cadmium from concentrated phosphoric acid solutions (up to 12 M). Cadmium can be removed from loaded resins using hydrochloric acid (5 M.), and the resin can be reused without additional treatment. The second part of the study focuses on the recovery of cadmium from industrial phosphoric acid solutions. The presence of iron(III) and copper(II) in large concentrations has a significantly negative effect on extraction properties. A pretreatment consisting in the reduction of ferric and cupric ions using Na2S2O4 or iron powder was used. The extraction efficiency was thereby increased, but it remained lower than that obtained with synthetic solutions. Recycling was also strongly limited: the presence of other competitor ions can explain this decrease in extraction efficiency MH - France MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000167224500017 L2 - ION-EXCHANGE; SOLVENT-EXTRACTION; CHELATING RESINS; SORPTION; CD(II); REMOVAL; CU(II); KINETICS; ZN(II); METALS SO - Industrial & Engineering Chemistry Research 2001 ;40(5):1422-1433 4083 UI - 13528 AU - Reynolds MP AU - Calderini DF AU - Condon AG AU - Rajaram S AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Buenos Aires, RA-1053 Buenos Aires, DF, ArgentinaCSIRO, Canberra, ACT, AustraliaReynolds, MP, CIMMYT, AP 6-641, Mexico City 06600, DF, Mexico TI - Physiological basis of yield gains in wheat associated with the LR19 translocation from Agropyron elongatum AB - The physiological and genetic basis of yield improvement in wheat is only partially understood. Nonetheless, a significant increase in yield and biomass has been observed in several backgrounds when alien chromatin associated with Lr19 was introgressed from Agropyron elongatum. Theoretically, higher yield and biomass may be achieved through (i) greater interception of incident radiation, (ii) increased radiation use efficiency, (iii) a more optimal source-sink balance permitting higher sink demand and/or a higher partitioning of assimilates to yield. The objectives of the current study were to evaluate the performance of near isogenic lines differing in Lr19 to observe the physiological basis of superior performance. Lr19 was associated with increases in yield (average 13%), final biomass (10%) and grain number (15%) in all backgrounds studied. Differences were not associated with improved light interception based on measurements of biomass shortly after canopy closure, nor with improved radiation use efficiency (RUE) prior to grain filling based on biomass accumulation rate and direct measurement of flag-leaf photosynthetic rate prior to anthesis. Lr19 was associated with an increased partitioning of biomass to spike growth at anthesis (13%), a higher grain number per spike, and higher RUE and flag-leaf photosynthetic rate during grain filling. The mechanism causing increased partitioning of assimilates to spikes relative to the rest of the plant in Lr19 isolines was apparently not related to phenology or assimilation capacity MH - Argentina MH - Australia MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 14 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000169211500023 L2 - Lr19;physiology;RUE;source-sink;wheat;yield;PROGRESS SO - Euphytica 2001 ;119(1-2):137-141 4084 UI - 12962 AU - Reynolds WF AU - Enriquez RG AD - Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, CanadaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04100, DF, MexicoReynolds, WF, Univ Toronto, Dept Chem, 80 St George St, Toronto, ON M5S 3H6, Canada TI - Gradient-selected versus phase-cycled HMBC and HSQC: pros and cons AB - The relative sensitivity of phase-cycled and gradient-selected HMBC spectra is assessed. As expected, the gradient-selected sequence is clearly superior to the phase-cycled sequence for concentrated solutions where t(1) ridges due to incomplete suppression of H-1 magnetization bonded to C-13 or heteroatoms are the main sources of noise in the phase-cycled spectrum but are strongly suppressed in the gradient-selected spectrum. However, the intensity of t(1) ridges appears to be directly proportional to signal strength. Consequently, for dilute solutions, t(1) ridges often provide only a minor contribution to total noise levels in phase-cycled HMBC spectra. In this case, provided that one acquires and processes phase-cycled HMBC spectra in the recommended mode (phase-sensitive acquisition and mixed-mode processing), a phase-cycled HMBC spectrum can show about twice the signal-to-noise ratio of an absolute value gradient-selected HMBC obtained in the same time. More extensive linear prediction is also possible with the phase-cycled sequence. There are similar advantages to phase-cycled HSQC spectra over gradient-selected HSQC spectra. Copyright (C) 2001 John Wiley & Sons, Ltd MH - Canada MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000170715500004 L2 - NMR;H-1 NMR;C-13 NMR;phase-cycled HMBC;gradient-selected HMBC;HETERONUCLEAR SHIFT CORRELATION; SENSITIVITY-ENHANCED DETECTION; CORRELATION NMR-SPECTROSCOPY; MULTIPLE-QUANTUM COHERENCE; CORRELATION SPECTRA; COUPLING-CONSTANTS; FLOCK SEQUENCE; ASSIGNMENT; H-1; RESOLUTION SO - Magnetic Resonance in Chemistry 2001 ;39(9):531-538 4085 UI - 12945 AU - rguello-Astorga GR AU - Ruiz-Medrano R AD - IPN, Ctr Invest & Estudios Avanzados, Dept Ingn Genet, Unidad Irapuato, Irapuato, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol, Mexico City 07738, DF, MexicoArguello-Astorga, GR, N Carolina State Univ, Dept Mol & Struct Biochem, Box 7622, Raleigh, NC 27695 USA TI - An iteron-related domain is associated to Motif 1 in the replication proteins of geminiviruses: identification of potential interacting amino acid-base pairs by a comparative approach AB - Geminiviruses encode a replication initiator protein, Rep, which binds in a sequence-specific fashion to iterated DNA motifs (iterons) functioning as essential elements for virus-specific replication. By using the iterons of more than one hundred geminiviruses as heuristic devices, we have identified a Rep subdomain 8 to 10 residues in length, whose primary structure varies among viruses harboring different iterons, but which is similar among viruses with identical iterons, regardless of their differences in host range, insect vector, geographical origin or genome structure. Close analysis of this heron-related domain (IRD) revealed consistent correlations between specific Rep residues and defined nucleotides of its cognate iteron, thus providing important insights about the molecular code which dictates the Rep preference for specific DNA sequences. A model of potential Rep-iteron contacts is proposed. The identified IRD is adjacent to a conserved motif characteristic of a superfamily of rolling-circle (RC) replication proteins, and secondary structure predictions suggest that those Rep subdomains form together the core of a novel DNA-binding domain possessing a beta -sheet as recognition subdomain, which is apparently conserved in the replication proteins of nanoviruses, circoviruses, microviruses, and a variety of ssDNA plasmids of eubacteria, archaebacteria and red algae. The evolutionary implications of these findings are discussed MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 23 U4 - Virology U5 - J;Article AV - English IS - 0304-8608 UR - ISI:000170885000003 L2 - WHEAT DWARF VIRUS; ROLLING-CIRCLE REPLICATION; CURLY TOP VIRUS; NECROTIC YELLOWS VIRUS; FEATHER DISEASE VIRUS; SENSE GENE-EXPRESSION; GOLDEN MOSAIC-VIRUS; DNA-REPLICATION; NUCLEOTIDE-SEQUENCE; PORCINE CIRCOVIRUS SO - Archives of Virology 2001 ;146(8):1465-1485 4086 UI - 13813 AU - rias-Montano JA AU - Floran B AU - Garcia M AU - Aceves J AU - Young JM AD - Univ Cambridge, Dept Pharmacol, Cambridge CB2 1QJ, EnglandCtr Invest & Estudios Avanzados, Dept Physiol Biophys & Neurosci, Mexico City, DF, MexicoYoung, JM, Univ Cambridge, Dept Pharmacol, Tennis Court Rd, Cambridge CB2 1QJ, England TI - Histamine H-3 receptor-mediated inhibition of depolarization-induced, dopamine D-1 receptor-dependent release of [H-3]-gamma-aminobutyric acid from rat striatal slices AB - 1 A study was made of the regulation of [H-3]-gamma -aminobutyric acid ([H-3]-GABA) release from slices of rat striatum by endogenous dopamine and exogenous histamine and a histamine H-3-agonist. Depolarization-induced release of [H-3]-GABA was Ca2+-dependent and was increased in the presence of the dopamine D-2 receptor family antagonist, sulpiride (10 muM) The sulpiride-potentiated release of [H-3]-GABA was strongly inhibited by the dopamine D-1 receptor family antagonist, SCH 23390 (1 muM). Neither antagonist altered basal release. 2 The 15 mM K+-induced release of [H-3]-GABA in the presence of sulpiride was inhibited by 100 muM histamine (mean inhibition 78 +/- 3%) and by the histamine H-3 receptor-selective agonist, immepip, 1 muM (mean inhibition 81 +/- 5%). The IC50 values for histamine and immepip were 1.3 +/- 0.2 muM and 16 +/- 2 nM, respectively. The inhibitory effects of histamine and immepip were reversed by the H-3 receptor antagonist, thioperamide, 1 muM. 3 The inhibition of 15 mM K+-induced [3H]-GABA release by immepip was reversed by the H3 receptor antagonist, clobenpropit, K-d 0.11 +/- 0.04 nM. Clobenpropit alone had no effect on basal or stimulated release of [H-3]-GABA. 4 Elevated K+ caused little release of [H-3]-GABA from striatal slices from reserpinized rats, unless the D-1 partial agonist, R(+)-SKF 38393, 1 muM, was also present. The stimulated release in the presence of SKF 38393 was reduced by 1 muM immepip to the level obtained in the absence of SKF 38393. 5 These observations demonstrate that histamine H-3 receptor activation strongly inhibits the dopamine D-1 receptor-dependent release of [H-3]-GABA from rat striatum; primarily through an interaction at the terminals of GABA neurones MH - United Kingdom MH - Mexico|Distrito Federal PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 18 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000168476500020 L2 - GABA release;rat striatum;dopamine D-1 receptors;dopamine D-2 receptors;histamine H-3 receptors;immepip;clobenpropit;thioperamide;SKF 38393;reserpine;SUBSTANTIA-NIGRA; CAUDATE-PUTAMEN; PARS RETICULATA; GABA RELEASE; BRAIN; STIMULATION; NEOSTRIATUM; ANTAGONIST; ACTIVATION; BINDING SO - British Journal of Pharmacology 2001 ;133(1):165-171 4087 UI - 13727 AU - Richer MG AU - Bullejos A AU - Borissova J AU - Mccall ML AU - Lee H AU - Kurtev R AU - Georgiev L AU - Kingsburgh RL AU - Ross R AU - Rosado M AD - UNAM, Inst Astron, Observ Astron Nacl, San Diego, CA 92143, USAInst Astrofis Canarias, Tenerife 38200, SpainUNAM, Inst Astron, Mexico City 04510, DF, MexicoBulgarian Acad Sci, Inst Astron, Sofia 1784, BulgariaIsaac Newton Inst Chile, Bulgarian Branch, Sofia 1784, BulgariaYork Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, CanadaUniv Sofia, Bulgarian Branch, Dept Astron, Sofia, BulgariaUniv Sofia, Bulgarian Branch, Isaac Newton Inst Chile, Sofia 1164, BulgariaRicher, MG, UNAM, Inst Astron, Observ Astron Nacl, POB 439027, San Diego, CA 92143 USA TI - IC 10: More evidence that it is a blue compact dwarf AB - We present optical spectroscopy of H Ir regions in the Local Group galaxy IC 10 and UBVR photometry of foreground stars in three fields towards this galaxy. From these data, we find that the foreground reddening: due to the Milky Way is E(B - V) = 0.77 +/- 0.07 mag. We find that IC 10 contains considerable internal dust, which qualitatively explains the variety of reddening values found by studies: of its different stellar populations. Based upon our foreground reddening, IC 10 has intrinsic photometric properties like those of a blue compact dwarf galaxy, and not those of a dwarf irregular. This result is consistent with much evidence that IC 10 is in the threes of a starburst that began at least 10 Myr ago. We also report the discovery of a new WR star in the H II region HL111c MH - Bulgaria MH - USA MH - Canada MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168682400010 L2 - galaxies : individual : IC 10;galaxies : local group;galaxies : fundamental parameters;galaxies : starburst;galaxies : dwarf;H-II REGIONS; IRREGULAR GALAXY IC-10; TO-DUST RATIO; MAGELLANIC-CLOUD; SURFACE PHOTOMETRY; STELLAR CONTENT; LOCAL GROUP; EXTINCTION; EVOLUTION; DISTANCE SO - Astronomy & Astrophysics 2001 ;370(1):34-42 4088 UI - 12167 AU - Richman AD AU - Herrera LG AU - Nash D AD - MSU Bozeman, Dept Plant Sci, Bozeman, MT 59719, USAUniv Nacl Autonoma Mexico, Dept Zool, Mexico City 04510, DF, MexicoRichman, AD, MSU Bozeman, Dept Plant Sci, Bozeman, MT 59719, USA TI - MHC class II beta sequence diversity in the deer mouse (Peromyscus maniculatus): implications for models of balancing selection AB - We studied population polymorphism at a major histocompatibility complex (MHC) class II beta gene in the deer mouse (Peromyscus maniculatus). We found that: (i) a single population of P. maniculatus has significantly higher levels of DNA and protein sequence diversity than worldwide samples from homologous genes in other taxa, including humans and mice; and (ii) the genealogy of allelic sequences in P. maniculatus deviates significantly from theoretical expectation under a model of symmetric balancing selection, in that alleles are relatively more divergent than expected. We suggest that the observation of high levels of pairwise allelic sequence divergence and deviation of the genealogy from theoretical expectation in P. maniculatus together provide support for a divergent allele advantage model for the maintenance of MHC polymorphism MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000172802400003 L2 - class II;divergent allele advantage;MHC;Pema EB;Peromyscus;symmetric balancing selection;HISTOCOMPATIBILITY COMPLEX LOCI; ALLELIC DIVERSITY; MOLECULAR CLOCK; HETEROZYGOTE ADVANTAGE; GENEALOGICAL STRUCTURE; SELF-INCOMPATIBILITY; NATURAL-SELECTION; POLYMORPHISM; EVOLUTION; GENES SO - Molecular Ecology 2001 ;10(12):2765-2773 4089 UI - 13945 AU - Rico JJ AU - Acha E AU - Madrigal M AD - Univ Michoacana, Fac Ingn Elect, Mexico City, DF, MexicoUniv Glasgow, Dept Elect & Elect Engn, Glasgow, Lanark, ScotlandRico, JJ, Univ Michoacana, Fac Ingn Elect, Mexico City, DF, Mexico TI - The study of inrush current phenomenon using operational matrices AB - The paper presents a new methodology for calculating magnetizing inrush currents. Similarly to the seminal work of Rajakovic and Semlyen, all the calculations are conducted in the Frequency domain, hence, circumventing the many problems encountered when time domain simulations are used to solve this problem. Unlike the work of Rajakovic and Semlgen [I], where a pre-determined sequence of steady-state "imaged" are obtained for a sufficiently long number of cycles to capture the complete picture of the inrush phenomenon, our method produces the full solution, with no loss of fidelity, of the overall inrush phenomenon. The solution is achieved by resorting to operational matrices and it is fully equivalent to that produced by time domain simulations but carried out entirely in the frequency domain. In principle, any orthogonal series expansion could be used with this method but in this paper Hartley series have been selected, The usefulness of the methodology is illustrated with simple but practical circuits, Comparisons against time domain simulations are given MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000167956300015 L2 - harmonic domain;Hartley series;inrush currents;operational matrices;TIME-VARYING SYSTEMS; HARMONIC DOMAIN; SERIES; IDENTIFICATION; OVERVOLTAGES; POLYNOMIALS SO - Ieee Transactions on Power Delivery 2001 ;16(2):231-237 4090 UI - 13139 AU - Riech I AU - Gomez-Herrera ML AU - Diaz P AU - Mendoza-Alvarez JG AU - Herrera-Perez JL AU - Marin E AD - IPN, CICATA, Mexico City 11500, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaUniv La Habana, IMRE, Havana 10400, CubaUniv Quindio, Quindio, ColombiaIPN, CICATA, Puebla 72160, MexicoRiech, I, IPN, CICATA, Legaria 694, Mexico City 11500, DF, Mexico TI - Measurement of the Auger lifetime in GaInAsSb/GaSb heterostructures using the photoacoustic technique AB - We have studied GaxIn1-xAsySb1-y/GaSb heterostructures for x=0.84 and y=0.14 using the photoacoustic technique with the heat transmission configuration. A theoretical model, which includes all the possible nonradiative recombination mechanisms that contribute to heat generation, was developed to calculate the photoacoustic signal for this type of heterostructure. The Auger recombination lifetime tau (Auger) was determined by fitting our experimental results to the calculated frequency dependence of the theoretical photoacoustic signal. The obtained value for tau (Auger) is compatible with those reported in the literature for semiconductors with band-gap energies below and above 0.5 eV, the energy region where there is a lack of experimental tau (Auger) values. (C) 2001 American Institute of Physics MH - Colombia MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000170277500024 L2 - N-TYPE; RECOMBINATION; SEMICONDUCTORS; INGAAS; DEPENDENCE; DIODE SO - Applied Physics Letters 2001 ;79(7):964-966 4091 UI - 12204 AU - Righter K AU - Rosas-Elguera J AD - Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721, USAUniv Guadalajara, Dept Geol, Guadalajara 44840, Jalisco, MexicoRighter, K, Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721, USA TI - Alkaline lavas in the volcanic front of the western Mexican Volcanic Belt: Geology and petrology of the Ayutla and Tapalpa volcanic fields AB - The Plio-Quaternary Ayutla and Tapalpa volcanic fields in the volcanic front of the western Mexican Volcanic Belt (WMVB) contain a wide variety of alkaline volcanic rocks, rather than only calc-alkaline rocks as found in many continental arcs. There are three principal rock series in this region: an intraplate alkaline series (alkali basalts and hawaiites), a potassic series (lamprophyres and trachylavas), and a calc-alkaline series. Phlogopite-clinopyroxenite and hornblende-gabbro cumulate xenoliths from an augite minette lava flow have orthocumulate textures. The phlogopite-clinopyroxenite xenoliths also contain apatite and titanomagnetite and probably formed by accumulation of minerals fractionated from an augite minette more primitive than the host. The intraplate alkaline series is probably generated by decompression melting of asthenospheric mantle as a result of corner flow in the mantle wedge beneath the arc. Alkaline magmas may be common in the WMVB as a result of prior metasomatism (during Tertiary Sierra Madre Occidental magmatism) of the Mexican sub-arc mantle. Generation of the more evolved andesites and dacites of the calc-alkaline series is due to either combined assimilation and fractional crystallization (AFC) or magma mixing. The preponderance of alkaline and hydrous lavas in this region demonstrates that these lava types are the norm, rather than the exception in western Mexico, and occur in regions that are not necessarily associated with active rifting MH - Mexico|Jalisco MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Review AV - English IS - 0022-3530 UR - ISI:000172674300008 L2 - arc basalt;subduction;alkali basalt;minette;hawaiite;metasomatism;SUBDUCTION ZONE MAGMATISM; CALC-ALKALINE; SOUTHWESTERN MEXICO; OXYGEN FUGACITY; TECTONIC IMPLICATIONS; QUATERNARY VOLCANISM; LIQUID EQUILIBRIA; CONTINENTAL-CRUST; PHASE-EQUILIBRIA; BASALT GLASSES SO - Journal of Petrology 2001 ;42(12):2333-2361 4092 UI - 11976 AU - Riley WJ AU - Ortiz-Monasterio I AU - Matson PA AD - Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACIMMYT, Mexico City 06600, DF, MexicoStanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305, USARiley, WJ, Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA TI - Nitrogen leaching and soil nitrate, nitrite, and ammonium levels under irrigated wheat in Northern Mexico AB - Nitrate (NO3-1) leaching from agricultural soils can represent a substantial loss of fertilizer nitrogen (N), but a large variation in losses has been reported. We report N leaching losses under four N fertilizer treatments and two farmer's fields in the Yaqui Valley, Mexico. In these irrigated wheat systems, farmers typically apply 250 kg N ha(-1) as anhydrous ammonia (knifed in) or urea (broadcast), with 75% applied directly before planting and 25% at the time of the first post-planting irrigation. Over two wheat seasons, we compared typical farmer's practices to alternatives that applied less N and more closely timed fertilizer application to plant demand. Field lysimeter measurements and predictions from a water transport simulation model (called NLOSS) were used to estimate the amount of N leached over the season. Approximately 5 and 2% of the applied N leached below the root zone with the typical farmer's practice in 1995-96 and 1997-98, respectively. The alternative treatments reduced N leaching losses by 60 to 95% while producing comparable economic returns to the farmer. Leaching losses from the two farmer's fields were substantially higher (about 14 and 26% of the applied N). Our results indicate that the typical farmer's practice leads to relatively high N leaching losses, and that alternative practices synchronizing fertilizer application with crop demand can substantially reduce these losses MH - USA MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 14 U4 - Soil Science U5 - J;Article AV - English IS - 1385-1314 UR - ISI:000173315100002 L2 - developing world agriculture;nitrogen fertilization;NLOSS model;soil nitrogen profile;MANAGEMENT; CONSEQUENCES; BALANCE; SYSTEM; RIVER; CROP SO - Nutrient Cycling in Agroecosystems 2001 ;61(3):223-236 4093 UI - 12492 AU - Rimada JC AU - Hernandez L AD - Copextel, Ctr Microelect, Havana, CubaCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaRimada, JC, Copextel, Ctr Microelect, Carretera Prensa Latina Km 11-2, Havana, Cuba TI - A new approach to ideal AlGaAs MQW solar cells AB - A theoretical model has been developed which shows that the insertion of multi-quantum wells into the depletion region of a p-i(MQW)-n AlxGa1-xAs solar cell can significantly enhance the conversion efficiencies. Open-circuit voltages, short-circuit current densities, I-V curves and conversion efficiencies have been calculated as functions of the well and barrier band gaps, width and depth of the wells, number of wells in the intrinsic region and the recombination rate in the interfaces. Particular emphasis is placed on calculation of absorption of the AlxGa1-xAs quantum wells. These results are matched with p-i-n solar calls which are identical in all respects except that they do not have quantum wells, We demonstrated that for determined values of the studied parameters the conversion efficiencies of the quantum well solar cell is higher to corresponding cell without quantum wells MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900051 SO - Modern Physics Letters B 2001 ;15(17-19):778-781 4094 UI - 13059 AU - Rimada JC AU - Hernandez L AD - Univ La Habana, Fac Fis, IMRE, Havana 10400, CubaCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoRimada, JC, Univ La Habana, Fac Fis, IMRE, Havana 10400, Cuba TI - Modelling of ideal AlGaAs quantum well solar cells AB - A theoretical model has been developed to determine the influence of the insertion of multi-quantum wells (MQW) over the conversion efficiencies of AlxGa1-xAs solar cells. Open-circuit voltages, short-circuit current densities, J-V curves and conversion efficiencies have been calculated as functions of the well and barrier band gaps, width and depth of the wells, number of wells in the intrinsic region and the recombination rate in the interfaces. Particular emphasis is placed on the calculation of the photon absorption in AlxGa1-xAs quantum wells. These results are matched with identical p-i-n solar cells without quantum wells. The outcomes of the model show that the insertion of MQW into the depletion region of a p-i(MQW)-n AlxGa1-xAs solar cell can significantly enhance the conversion efficiencies. We demonstrated that for determined values of the studied parameters, the conversion efficiencies of the quantum well solar cell are higher than that of the corresponding cell without quantum wells. (C) 2001 Published by Elsevier Science Ltd MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000170408900003 L2 - quantum well solar cells;AlxGa1-xAs solar cell;open-circuit voltage;short-circuit current;ENHANCEMENT SO - Microelectronics Journal 2001 ;32(9):719-723 4095 UI - 10021 AU - Rita P AU - Hasse SJ AD - Univ Wisconsin, Dept Rehabil Med, Madison, WI 53706, USAUniv Wisconsin, Dept Biomed Engn, Madison, WI 53706, USAUniv Autonoma Estado Morelos, Fac Med, Cuernavaca, Morelos, MexicoBach-y-Rita, P, Univ Wisconsin, Dept Rehabil Med, Madison, WI 53706, USA TI - The role of the brain in perception AB - The recent interest of cognitive- and neuro-scientists in the topic of consciousness (and the dissatisfaction with the present state of knowledge) has revealed deep conceptual differences with Humanists, who have dealt with issues of consciousness for centuries. O'Regan & Noe have attempted (unsuccessfully) to bridge those differences MH - Mexico|Morelos MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Psychology, Biological;Behavioral Sciences;Neurosciences U5 - J;Editorial Material AV - English IS - 0140-525X UR - ISI:000178722800058 SO - Behavioral and Brain Sciences 2001 ;24(5):975-+ 4096 UI - 13192 AU - Rita P AU - Aiello GL AD - Univ Wisconsin, Dept Rehabil Med & Biomed Engn, Madison, WI 53706, USADipartimento Sci Fis & Astron, Palermo, ItalyUniv Autonoma Estado Morelos, Fac Med, Cuernavaca, Morelos, MexicoBach-y-Rita, P, Univ Wisconsin, Dept Rehabil Med & Biomed Engn, Madison, WI 53706 USA TI - Brain energetics and evolution AB - The human brain does not use more energy than the smaller brains of animals of comparable corporal weight. Uniquely, human functions localized largely in parts of the human brain that show greatest size increase over other animals may be mediated primarily by nonsynaptic neurotransmission, with reduced energy cost per kilogram of brain. This may affect the energetic constraints on evolution MH - Italy MH - Mexico|Morelos MH - USA PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Biological;Behavioral Sciences;Neurosciences U5 - J;Editorial Material AV - English IS - 0140-525X UR - ISI:000170177900042 L2 - DIFFUSION NEUROTRANSMISSION; VOLUME SO - Behavioral and Brain Sciences 2001 ;24(2):280-+ 4097 UI - 12969 AU - Rivas-Arancibia S AU - Rodriguez AI AU - Zigova T AU - Willing AE AU - Brown WD AU - Cahill DW AU - Sanberg PR AD - Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoUniv S Florida, Dept Psychol, Tampa, FL 33612, USAUniv S Florida, Dept Neurosurg, Tampa, FL 33612, USAUniv S Florida, Coll Med, Program Neurosci, Tampa, FL 33612, USARivas-Arancibia, S, Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, AP 70-250, Mexico City 04510, DF, Mexico TI - Taurine increases rat survival and reduces striatal damage caused by 3-nitropropionic acid AB - Taurine acts as an antioxidant protecting neurons from free radical-mediated cellular damage. 3-nitropropionic acid (3-NP) inhibits energy metabolism, initiating oxidative stress. With the objective to examine whether taurine can protect glia and neurons from damage produced by 3-NP, male Wistar and Sprague-Dawley rats were treated with either (1) saline, (2) taurine (3) 3-NP and saline, or (4) 3-NP and taurine for 4 days. Survival was determined and brains were processed immunohistochemically. Large striatal lesions and increased GFAP, SOD, and taurine immunoreactivity were detected in the 3-NP group when compared with control groups. In contrast, animals receiving 3-NP and taurine exhibited less GFAP, SOD, and taurine immunoreactivity, along with increased survival rates. Results indicate that taurine treatment after 3-NP administration protects the striatum from damage MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0020-7454 UR - ISI:000170680400006 L2 - 3-nitropropionic acid;neurodegeneration;oxidative stress;taurine;antioxidant;Huntington's disease;DEFICITS SO - International Journal of Neuroscience 2001 ;108(1-2):55-67 4098 UI - 11831 AU - Rivera-Arriaga E AU - Villalobos G AD - Univ Autonoma Campeche, Ctr EPOMEX, Campeche 24020, MexicoUniv Delaware, Grad Program Marine Policy, Newark, DE 19716, USARivera-Arriaga, E, Univ Autonoma Campeche, Ctr EPOMEX, Av Agustin Melgar & Juan Barrera,Apartado Postal, Campeche 24020, Mexico TI - The coast of Mexico: approaches for its management AB - The Mexican coast can be regionalized according to the main economic activities performed in it; for the purpose of this work we are considering five regions: North Pacific, Mar de Cortes, South Pacific, Gulf of Mexico, and Caribbean. According to the national census, the population of the coastal zone in Mexico is increasing at a higher rate than the national average. The main industries located in the coastal and marine zones are oil and gas, fisheries, aquaculture, tourism, maritime transportation and ports, chemical industries, and minerals. Mexico has developed an environmental legal framework based on the Ley General del Equilibrio Ecologico y la Proteccion al Ambiente (LGEEPA), and the coastal management paradigm is strengthened through several other legal tools developed specifically for this purpose. There are three management strategies identified in this work for the coastal zone in Mexico: (1) Agency Leadership, (2) Protected Areas, and (3) Land Ordinance. Each one of these strategies includes stages for eventually developing an Integrated Coastal Zone Management (ICZM) plan that considers vertical and horizontal integration, scientific research of natural resources and ecosystems, and socioeconomic issues. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Campeche MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000173715300003 SO - Ocean & Coastal Management 2001 ;44(11-12):729-756 4099 UI - 14484 AU - Rivera-Morales LG AU - Novitsky VA AU - Trujillo JR AU - Lavalle-Montalvo C AU - Cano-Dominguez C AU - Ramos-Jimenez J AU - Jimenez-Rios E AU - Flores-Flores L AU - Lopez-Guillen P AU - Gilbert P AU - Vannberg F AU - Tamez-Guerra R AU - Rodriguez-Padilla C AU - Essex M AD - Harvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol & Virol, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Physiol Program, Boston, MA 02115, USACtr Med Nacl Raza, Hosp Infectol, Mexico City, DF, MexicoUANL, Hosp Univ Dr Jose Eleuterio Gonzalez, Dept Infectol, Mexico City, DF, MexicoIMSS, Gen Hosp, Merida, Yucatan, MexicoIMSS, Gen Hosp, Puebla, MexicoIMSS Juan I Menchaca, Unidad Infectol, Guadalajara, Jalisco, MexicoNovitsky, VA, Harvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, FXB-310,651 Huntington Ave, Boston, MA 02115 USA TI - The molecular epidemiology of HIV type 1 of men in Mexico AB - Genotypic characteristics of human immunodeficiency virus type 1 (HIV-1) in Mexico were investigated in a multicenter study that involved centers in five geographic regions of the country. Study samples (n = 65) collected from male patients in 1998-1999 were sequenced within the C2-V5 region of the gp120 env gene. Phylogenetic analysis revealed that subtype B predominates in Mexico, The level of interpatient nucleotide diversity (mean value of 8.9%) was congruent with multiple introductions of the virus and the "aging" epidemic in Mexico. One-third of samples (30.8% of cases) showed polymorphism within the crown of the V3 loop demonstrating non-GPGR motifs, Two new motifs in the V3 loop crown-HPGG and GPEG-were observed. The evolution of the AIDS epidemic in Mexico should be closely monitored since non-B HIV-1 subtypes might be introduced. The nucleotide sequences were deposited in the GenBank under accession numbers AF200855-AF200869, AF200871-AF200892, and AF200894-AF200921 MH - USA MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Puebla MH - Mexico|Yucatan PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0889-2229 UR - ISI:000166525800008 L2 - AIDS SO - Aids Research and Human Retroviruses 2001 ;17(1):87-92 4100 UI - 13990 AU - Rivera-Munoz E AU - Diaz JR AU - Rodriguez J AU - Brostow W AU - Castano VM AD - Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoUniv N Texas, Dept Mat Sci, Denton, TX 76203, USARivera-Munoz, E, Univ Nacl Autonoma Mexico, Inst Fis, AP 1-1010, Queretaro 76000, Mexico TI - Hydroxyapatite spheres with controlled porosity for eye ball prosthesis: processing and characterization AB - Porous hydroxyapatite spheres were prepared by a modified gelcasting method producing a ceramic prosthesis with controled porosity. The spheres are approximately 2.2 cm in diameter with a relatively homogeneous pore size distribution from 10 to 40 mum in diameter. The samples were characterized by X-ray powder diffractometry (XRD) and Fourier transform infra-red spectroscopy (FTIR) to identify the phases both prior to and after the gelcasting process. Surface morphology analysis and porosity evaluations were performed with scanning electron microscopy (SEM), while surface area measurements were carried out by the BET technique. (C) 2001 Kluwer Academic Publishers MH - Mexico|Queretaro MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0957-4530 UR - ISI:000167934200004 L2 - PHOSPHATE; BIOCERAMICS; INGROWTH; IMPLANTS SO - Journal of Materials Science-Materials in Medicine 2001 ;12(4):305-311 4101 UI - 14047 AU - Rivera-Munoz E AU - Brostow W AU - Rodriguez R AU - Castano VM AD - Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoUniv N Texas, Dept Mat Sci, Denton, TX 76203, USAUniv N Texas, Dept Chem, Denton, TX 76203, USACastano, VM, Univ Nacl Autonoma Mexico, Inst Fis, AP 1-1010, Queretaro 76000, Mexico TI - Growth of hydroxyapatite on silica gels in the presence of organic additives: kinetics and mechanism AB - Synthetic hydroxyapatite was grown on surfaces of silica gels by immersing silica monoliths in a simulated body fluid at 37 degreesC. The gels were prepared by the sol-gel method and the drying process was controlled by using different additives (mono- and di-ethylene glycol, formamide and glycerin) to obtain large monoliths. The additives affect the growth of the apatite by changing the kinetic constants of chemical reactions on the silica surface. Surface areas and pore size distributions were determined, energy dispersion and FTIR spectra obtained, and scanning electron microscopy performed. The formation of the hydroxyapatite competes with the formation of crystalline calcium carbonate, but the results allow optimization of conditions for the growth of the former as a function of the type and concentration of the additive. For these optimal conditions, the mechanism and the order of the reaction were determined MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1432-8917 UR - ISI:000167646100003 L2 - hydroxapatite;silica gels;sol-gel method;CALCIUM-PHOSPHATE CERAMICS; PEROXY DERIVATIVES; BONE; CONDUCTIVITY; COATINGS; TITANIUM; IMPLANTS; RESINS SO - Materials Research Innovations 2001 ;4(4):222-230 4102 UI - 12567 AU - Rivera JA AU - Gonzalez-Cossio T AU - Flores M AU - Romero M AU - Rivera M AU - Tellez-Rojo MM AU - Rosado JL AU - Brown KH AD - Inst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca 62508, Morelos, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Detp Fisiol Nutr, Mexico City, DF, MexicoUniv Calif Davis, Program Int Nutr, Davis, CA 95616, USAUniv Calif Davis, Dept Nutr, Davis, CA 95616, USARivera, JA, Inst Nacl Salud Publ, Ctr Invest Nutr & Salud, Avenida Univ 655,Colonia Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Multiple micronutrient supplementation increases the growth of Mexican infants AB - Background: The role of single micronutrient deficiencies in the etiology of growth retardation has recently gained attention. However, because multiple micronutrient deficiencies are common in children in developing countries, it is possible that more than one micronutrient may limit growth and, hence, the correction of a sine deficiency may not be enough to improve growth substantially. Objective: The objective was to evaluate the effect of multiple micronutrient supplementation on the growth of children aged 8-14 mo whose diets were poor in several micronutrients. Design: Children were randomly assigned to 1 of 2 groups. One group received a multiple micronutrient supplement containing the recommended dietary allowance (RDA) or 1.5 times the RDA of vitamins A, D, E, K, C, B-1, B-6, B-12, riboflavin, niacin, biotin, folic acid, and pantothenic acid, and iron, zinc, iodine, copper, manganese, and selenium. The other group received a placebo. Supplements were administered 6 d/wk for an average of 12.2 mo. Body length was measured at baseline and monthly thereafter until the end of supplementation. Results: Supplemented infants initially aged greater than or equal to 12 mo had significantly greater length gains than did the placebo group, with a difference of 8.2 mm. (length-for-age z score: 0.3) at the end of supplementation. In contrast, differences in length gains between the supplemented and placebo groups initially aged : 12 mo were not significant. Conclusions: Micronutrient deficiencies limited the growth of the Mexican infants studied. Improving micronutrient intakes should be a component of interventions to promote growth in infants living in settings where micronutrient intakes are inadequate MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 25 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000171779500018 L2 - multiple micronutrient supplementation;growth;growth retardation;micronutrient deficiencies;Mexico;infants;children;ZINC SUPPLEMENTATION; VITAMIN-A; CHILDREN; IMPACT; IMPROVES; AGE SO - American Journal of Clinical Nutrition 2001 ;74(5):657-663 4103 UI - 12666 AU - rmendariz-Borunda J AU - Bueno M AU - Salgado S AU - Delgado V AU - guilar-Cordova E AD - Univ Guadalajara, Guadalajara 44430, Jalisco, MexicoHarvard Gene Therapy Initiat, Boston, MA, USA TI - Urokinase-type plasminogen activator gene therapy in liver cirrhosis is mediated by activation of metalloproteinases and down-regulation of collagens gene expression MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000171224700820 SO - Hepatology 2001 ;34(4):379A-379A 4104 UI - 13109 AU - Rocchetti M AU - Besana A AU - Gurrola GB AU - Possani LD AU - Zaza A AD - Univ Milano Bicocca, Dept Biosci & Biotechnol, I-20126 Milan, ItalyNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca, Morelos, MexicoZaza, A, Univ Milano Bicocca, Dept Biosci & Biotechnol, Piazza Sci 2,Room U3-3013, I-20126 Milan, Italy TI - Rate dependency of delayed rectifier currents during the guinea-pig ventricular action potential AB - 1. The action potential clamp technique was exploited to evaluate the rate dependency of delayed rectifier currents (I-Kr and I-Ks) during physiological electrical activity. I-Kr and I-Ks were measured in guinea-pig ventricular myocytes at. pacing cycle lengths (CL) of 1000 and 250 ins. 2. A shorter CL, with the attendant changes in action potential shape, was associated with earlier activation and increased magnitude of both I-Kr and I-Ks. Nonetheless, the relative contributions of and I-Kr and I-Ks to total transmembrane current were independent of CL. 3. Shortening of diastolic interval only (constant action potential shape) enhanced I-Ks, but not I-Kr. 4. I-Kr was increased by a change in the action potential shape only (constant. diastolic interval). 5. In ramp clamp experiments, I-Kr amplitude was directly proportional to repolarization rate at values within the low physiological range (<1.0 V s(-1)); at higher repolarization rates proportionality became shallower and finally reversed. 6. When action potential duration (APD) was modulated by constant current, injection (I-clamp), repolarization rates > 1.0 V s(-1) were associated with a reduced effect of I-Kr block on APD. The effect of changes in repolarization rate was independent of CL and occurred in the presence of I-Ks blockade. 7. In spite of its complexity, the behaviour of I-Kr was accurately predicted by a numerical model based entirely on known kinetic properties of the current. 8. Both I-Kr and I-Ks tray he increased at fast heart rates, but this may occur through completely different mechanisms. The mechanisms identified are such as to contribute to abnormal rate dependency of repolarization in prolonged repolarization syndrome MH - Italy MH - Mexico|Morelos PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 22 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000170378300009 L2 - LONG QT SYNDROME; K+-CURRENT; POTASSIUM CHANNEL; CARDIAC-ARRHYTHMIAS; MOLECULAR-BASIS; 2 COMPONENTS; MYOCYTES; MUTATIONS; KVLQT1; REPOLARIZATION SO - Journal of Physiology-London 2001 ;534(3):721-732 4105 UI - 13512 AU - Rodriguez-Castellon E AU - Jimenez-Lopez A AU - Maireles-Torres P AU - Merida-Robles J AU - Braos-Garcia P AU - guilar-Armenta G AU - Flores-Loyola E AU - Marmottini F AU - Felici E AD - Univ Malaga, Fac Ciencias, Dept Quim Inorgan, E-29071 Malaga, SpainUniv Autonoma Puebla, Fac Ciencias Quim Benemerita, Ctr Invest, Puebla 72570, MexicoUniv Perugia, Dipartimento Chim, Chim Inorgan Lab, I-06100 Perugia, ItalyRodriguez-Castellon, E, Univ Malaga, Fac Ciencias, Dept Quim Inorgan, E-29071 Malaga, Spain TI - Synthesis and characterization of novel alumina-pillared gamma-zirconium phosphates AB - The preparation of alumina-pillared gamma -zirconium phosphate materials was carried out for the first time by thermal hydrotreatment at 473 K of stable aqueous colloidal suspensions of gamma -zirconium phosphate and aluminum oligomeric solutions. The nature of the resulting porous materials depends on the delamination processes used. P-31 MAS NMR data suggest the existence of P-O-Al groups, and Al-27 NMR analysis by means of the two-dimensional five-quanta MQMAS technique reveals the coexistence, in some cases, of octahedral, tetrahedral, and pentacoordinate aluminum. The samples, fresh and after heating at 673 K, were fully characterized by chemical analysis, X-ray diffraction analysis, thermogravimetric-differential thermal analysis, X-ray photoelectron spectroscopy, temperature-programmed desorption of NH3, pyridine adsorption coupled to IR spectroscopy, and nitrogen adsorption-desorption at 77 K MH - Italy MH - Mexico|Puebla MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000169150100040 L2 - SOLID-STATE; MAS-NMR; OXIDATIVE DEHYDROGENATION; ACIDIC PROPERTIES; SPECTROSCOPY; CHROMIA; CATALYSTS; AL-27; EXCHANGE; PROPANE SO - Langmuir 2001 ;17(12):3769-3775 4106 UI - 14293 AU - Rodriguez-Cuevas S AU - Macias CG AU - Franceschi D AU - Labastida S AD - Hosp Oncol, Dept Surg, CMN, IMSS, Mexico City 03100, DF, MexicoDirrec Gen Epidemiol, Secretary Hlth, Mexico City, DF, MexicoSylvester Comprehens Canc Ctr, Dept Surg, Miami, FL, USAHosp Oncol, Dept Stat, CMN, IMSS, Mexico City 03100, DF, MexicoRodriguez-Cuevas, S, Hosp Oncol, Dept Surg, CMN, IMSS, Rebsamen 1142,Col Valle, Mexico City 03100, DF, Mexico TI - Breast carcinoma presents a decade earlier in Mexican women than in women in the United States or European countries AB - BACKGROUND. In Mexico, breast carcinoma is the second mast frequent malignancy, representing 10.6% of all cases and 16.4% of all cancers in women, with an increase in breast carcinoma mortality rates from 3.6 per 100,000 women in 1985 to 6 per 100,000 women in 1994. Most of the tumors are diagnosed in advanced stages with little chance of cure. METHODS. To determine the age of patients in Mexico at presentation of breast carcinoma, the authors analyzed the cases registered from 1993 to 1996 from the database of the Histopathological Registry of Malignant Neoplasms in Mexico. RESULTS. There were 29,075 cases of breast carcinoma The median age of Mexican women with breast carcinoma is 51 years, and 45.5% of all breast carcinomas develop before patients reach age 50 years. The most frequently affected age group is that of 40-49 years (29.5%), whereas the groups from 30 to 39 and from 60 to 69 years of age have a similar percentage (14%) of frequency. This contrasts with women from the United States, as well as with women from European countries, where the median age at presentation is 63 years, and only one-fourth of the patients are younger than 50 years of age, and three-fourths are postmenopausal. Similar to Mexico, in Venezuela and in Japan nearly one-half of women with breast carcinoma are younger than 50 years of age, and this resembles rates in many Latin American countries. CONCLUSIONS. It is necessary to change the guidelines of breast carcinoma screening in Mexican women, to increase the possibility of early diagnosis and better survival. (C) 2001 American Cancer Society MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 13 U4 - Oncology U5 - J;Article AV - English IS - 0008-543X UR - ISI:000167057800033 L2 - breast carcinoma;age;Mexico;screening;CANCER SO - Cancer 2001 ;91(4):863-868 4107 UI - 13219 AU - Rodriguez-Frias MD AU - del Peral L AU - Perez-Peraza J AD - Univ Alcala de Henares, Dept Fis, Madrid, SpainUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoRodriguez-Frias, MD, Univ Alcala de Henares, Dept Fis, Madrid, Spain TI - Model of ionic charge states of impulsive solar energetic particles in solar flares AB - We have fully developed a computational model (ESCAPE) to follow the behavior of the mean charge state of ions in solar energetic particle events while the ions are accelerated. Our model combines acceleration with energy loss and charge stripping low in the corona. Therefore we have taken into account explicitly the second-order Fermi-type stochastic acceleration under a magnetohydrodynamic turbulence. We have found that the mean ionic charge states depend sensitively on plasma parameters as source temperature or density and on acceleration parameters as efficiency or the timescales for acceleration. Our model finds a systematic increase of the ionic charge states with energy for all the ions studied. This energy dependence differs between ions, and in the energy range of observations this dependence is stronger for heavy ions MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000170077400020 L2 - ACCELERATION PROCESSES; EQUILIBRIUM SO - Journal of Geophysical Research-Space Physics 2001 ;106(A8):15657-15664 4108 UI - 13841 AU - Rodriguez-Guadarrama LA AU - Vasquez VR AD - Univ Nevada, Div Chem Engn, Reno, NV 89557, USADynasol Elastomeros, Ctr Res & Dev, Altamira 89600, Tamaulipas, MexicoVasquez, VR, Univ Nevada, Div Chem Engn, Mail Stop 170, Reno, NV 89557 USA TI - Phase behavior of amphiphile-solvent systems from lattice Monte Carlo simulations AB - Monte Carlo simulations of a lattice model for amphiphile/solvent systems are used to obtain data for the configurational energy of mixing. Based on the simulation results, the energy of mixing is correlated as a function of the interaction energy and volume fraction of the amphiphile using a Redklich-Kister correlation. The Helmholtz free energy of mixing is obtained by using the Gibbs-Helmholtz relation with the athermal entropy of mixing prediction from the quasichemical approximation as boundary condition. Using this information, an analytic expression for the chemical potential of the amphiphile and solvent is obtained, and the phase behavior for amphiphiles with different structure is obtained. The expressions generated in this work produce coexistence curves that are more accurate than those obtained from the quasichemical approximation. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Tamaulipas MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000168303600013 L2 - amphiphiles;thermodynamic mixing properties;lattice theory;Monte Carlo simulation;LIQUID-LIQUID EQUILIBRIA; BINARY POLYMER-SOLUTIONS; MODEL; THERMODYNAMICS; AGGREGATION; COEXISTENCE SO - Fluid Phase Equilibria 2001 ;179(1-2):193-206 4109 UI - 13019 AU - Rodriguez-Hernandez H AU - Reyes MR AU - Escalante B AU - Posadas F AD - Fac Med UJED, Food & Nutr Res Ctr, Durango, CO, USAIPN, CINVESTAV, Mexico City 07738, DF, Mexico TI - Transcription of leptin gene in sinusoidal endothelial rat liver cells MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0168-8278 UR - ISI:000169243400289 SO - Journal of Hepatology 2001 ;34():82-82 4110 UI - 13020 AU - Rodriguez-Hernandez H AU - Ruiz-madrigal B AU - Gonzalez JL AU - Aguilar GM AU - Reyes MR AU - Panduro-Cerda A AD - CUCS UdeG, Guadalajara, Jalisco, MexicoIMSS, Durango, MexicoUJED, Fac Med, CIAN, Durango, CO, USA TI - Apolipoprotein E polymorphism in patients with non-alcoholic steatohepatitis in a Mexican population MH - Mexico|Durango MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0168-8278 UR - ISI:000169243400728 SO - Journal of Hepatology 2001 ;34():197-197 4111 UI - 13709 AU - Rodriguez-Iturbe B AU - Pons H AU - Quiroz Y AU - Gordon K AU - Rincon J AU - Chavez M AU - Parra G AU - Herrera-Acosta J AU - Gomez-Garre D AU - Largo R AU - Egido J AU - Johnson RJ AD - Univ Hosp, Renal Serv, Maracaibo, VenezuelaUniv Hosp, Dept Immunobiol INBIOMED, Maracaibo, VenezuelaUniv Washington, Med Ctr, Div Nephrol, Seattle, WA 98195, USAInst Nacl Cardiol, Dept Nephrol, Mexico City, DF, MexicoFdn Jimenez Diaz, Nephrol Lab, E-28040 Madrid, SpainRodriguez-Iturbe, B, Apartado Postal 1430, Maracaibo 4001A, Zulia, Venezuela TI - Mycophenolate mofetil prevents salt-sensitive hypertension resulting from angiotensin II exposure AB - Background. Interstitial mononuclear cell infiltration is a feature of experimental models of salt-sensitive hypertension (SSHTN). Since several products of these cells are capable of modifying local vascular reactivity and sodium reabsorption, we investigated whether mycophenolate mofetil (MMF), a drug known to inhibit infiltration and proliferation of immune cells, would modify the SSHTN induced by angiotensin II (Ang II) infusion. Methods. Sprague-Dawley rats received Ang II for two weeks using subcutaneous minipumps. A high-sodium (4% NaCl) diet was started on the third week and was maintained until the eighth week. MMF (30 mg/kg, N = 15), an immunosuppressive drug, or vehicle (N = 15) was given daily by gastric gavage during the initial three weeks. Sham-operated rats (N = 9) were used as controls. Body weight, blood pressure (tail-cuff plethysmography), and serum creatinine were determined weekly. Urinary malondialdehyde (MDA) excretion, renal histology, and immunohistology, including the presence of Ang II and superoxide-producing cells, were analyzed at the end of Ang II infusion and at eight weeks. Results. MMF treatment did not modify hypertension induced during exogenous Ang II infusion, but prevented the subsequent SSHTN. Tubulointerstitial injury resulting from Ang II infusion was significantly reduced by MMF treatment, as were proliferative activity, T-cell infiltration and activation (interleukin-2 receptor expression), superoxide-producing cells, and urinary MDA excretion. Ang II-producing cells were present in the renal tubulointerstitium of rats with SSHTN (60 +/- 30 Ang II-positive cells/mm(2) at 8 weeks) and were reduced by two thirds in the MMF-treated group. Forty percent of lymphocytes infiltrating the tubulointerstitium stained positive for Ang II. The expression of Ang II receptors in the kidney was unmodified. Conclusions. SSHTN resulting from Ang II infusion is associated with infiltration and activation of immune cells that produce Ang II. MMF treatment reduces these features and prevents the development of SSHTN MH - Mexico|Distrito Federal MH - Spain MH - USA MH - Venezuela PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 70 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000168619300023 L2 - immune system;renal interstitium;cell proliferation;immunosuppression;rat experimental model;blood pressure;mononuclear cell infiltrate;FACTOR-KAPPA-B; CONVERTING ENZYME; TUBULOINTERSTITIAL DISEASE; CYCLOSPORINE NEPHROPATHY; MEDIATED HYPERTENSION; SUPEROXIDE PRODUCTION; HUMAN MONOCYTES; KIDNEY-DISEASE; LYMPHOCYTES-T; MESSENGER-RNA SO - Kidney International 2001 ;59(6):2222-2232 4112 UI - 13825 AU - Rodriguez-Iturbe B AU - Pons H AU - Herrera-Acosta J AU - Johnson RJ AD - Inst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City, DF, MexicoHosp Univ Maracaibo, Renal Serv, Maracaibo, VenezuelaUniv Washington, Ctr Med, Dept Med, Div Renal, Washington, DC, USARodriguez-Iturbe, B, Apartado Postal 1430, Maracaibo 4001A, Venezuela TI - Role of immunocompetent cells in nonimmune renal diseases AB - Renal infiltration with macrophages and monocytes is a well recognized feature of not only immune, but also nonimmune kidney disease. This review focuses on the investigations that have shown accumulation of immunocompetent cells in experimental models of acute and chronic ischemia, protein overload, hypercholesterolemia. renal ablation, obstructive uropathy, polycystic kidney disease, diabetes, aging, murine hypertension, and nephrotoxicity. We examine the mechanisms of infiltration of immunocompetent cells and their participation in the self-perpetuating cycle of activation of the angiotensin system generation of reactive oxygen species, and further recruitment of monocytes and lymphocytes. We also discuss the possibility of antigen-dependent and antigen-independent mechanisms of immune cell activation in these animal models. Finally, we review the recent studies in which suppression of cellular immunity with mycophenolate mofetil has proven beneficial in attenuating or preventing the progression of renal functional and histologic damage in experimental conditions of nonimmune nature MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 74 U4 - Urology & Nephrology U5 - J;Review AV - English IS - 0085-2538 UR - ISI:000168255200002 L2 - macrophages;lymphocytes;cell activation;tubulointerstitial injury;proteinuria;progressive renal disease;hypertension;CHRONIC CYCLOSPORINE NEPHROPATHY; POLYCYSTIC KIDNEY-DISEASE; COLONY-STIMULATING FACTOR; PUROMYCIN AMINONUCLEOSIDE NEPHROSIS; MONOCYTE CHEMOATTRACTANT PROTEIN-1; GLOMERULAR CAPILLARY HYPERTENSION; DIET-INDUCED HYPERCHOLESTEROLEMIA; ANTIGEN-INDEPENDENT ACTIVATION; LEUKOCYTE ADHESION MOLECULES; SALT-SENSITIVE HYPERTENSION SO - Kidney International 2001 ;59(5):1626-1640 4113 UI - 14090 AU - Rodriguez-Ramos R AU - Sabina FJ AU - Guinovart-Diaz R AU - Bravo-Castillero J AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, Habana 4, CubaNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726,Delagac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Closed-form expressions for the effective coefficients of a fiber-reinforced composite with transversely isotropic constituents - I. Elastic and square symmetry AB - A two-phase parallel fiber-reinforced periodic elastic composite is considered wherein the constituents exhibit transverse isotropy. The fiber cross-section is circular and the periodicity is the same in two orthogonal directions. Simple closed-form formulae are obtained for the effective properties of this composite by means of the asymptotic homogenization method. Numerical computation of these is easy, The analytical solution of the required resulting plane- and antiplane-strain local problems, which turns out to be only three, makes use of potential methods of a complex variable and properties of Weierstrass elliptic and related functions with periods (1,0) and (0,1). Dvorak's universal type of relations for this composite are easily derived in an elementary new way without solving any local problem. This result also applies when the interface may be arbitrarily shaped, but compatible with the square symmetry. Comparison with experimental data is shown. The above results include the situation when one or both phases are isotropic. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 29 U4 - Materials Science, Multidisciplinary;Mechanics U5 - J;Article AV - English IS - 0167-6636 UR - ISI:000167592700003 L2 - fiber-reinforced composites;universal relations;asymptotic homogenization method;effective moduli;periodic structures;tetragonal elastic composites;PIEZOELECTRIC COMPOSITES; ASYMPTOTIC HOMOGENIZATION; PERIODIC STRUCTURE; UNIFORM-FIELDS; MEDIA SO - Mechanics of Materials 2001 ;33(4):223-235 4114 UI - 13879 AU - Rodriguez AF AU - Blass WE AU - Missimer JH AU - Leenders KL AD - Paul Scherrer Inst, PET Program, CH-5232 Villigen, SwitzerlandInst Tecnol & Estuidos Super Monterrey, Dept Comp Sci, Mexico City, DF, MexicoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAMissimer, JH, Paul Scherrer Inst, PET Program, CH-5232 Villigen, Switzerland TI - Artificial neural network Radon inversion for image reconstruction AB - Image reconstruction techniques are essential to computer tomography. Algorithms such as filtered backprojection (FBP) or algebraic techniques are most frequently used. This paper presents an attempt to apply a feed-forward back-propagation supervised artificial neural network (BPN) to tomographic image reconstruction, specifically to positron emission tomography (PET). The main result is that the network trained with Gaussian test images proved to be successful at reconstructing images from projection sets derived from arbitrary objects. Additional results relate to the design of the network and the full width at half maximum (FWHM) of the Gaussians in the training sets. First, the optimal number of nodes in the middle layer is about an order of magnitude less than the number of input or output nodes. Second, the number of iterations required to achieve a required training set tolerance appeared to decrease exponentially with the number of nodes in the middle layer. Finally, for training sets containing Gaussians of a single width, the optimal accuracy of reconstructing the control set is obtained with a FWHM of three pixels. Intended to explore feasibility, the BPN presented in the following does not provide reconstruction accuracy adequate for immediate application to PET. However, the trained network does reconstruct general images independent of the data with which it was trained. Proposed in the concluding section are several possible refinements that should permit the development of a network capable of fast reconstruction of three-dimensional images from the discrete, noisy projection data characteristic of PET. (C) 2001 American Association of Physicists in Medicine MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0094-2405 UR - ISI:000168216600012 L2 - artificial neural network;positron emission tomography (PET);image reconstruction;inverse Radon transform SO - Medical Physics 2001 ;28(4):508-514 4115 UI - 11077 AU - Rodriguez C AU - Miguel A AU - Lima H AU - Heinrichs K AD - Club Univ Nacl AC, Coyoacan, MexicoArmstrong Atlantic State Univ, Savannah, GA, USARodriguez, C, Insurgents Sur 4425-36,Col La Joya, Mexico City 14430, DF, Mexico TI - Osteitis pubis syndrome in the professional soccer athlete: A case report AB - Objective: To describe the pathomechanics, diagnostic procedures, classification, and conservative management of the osteitis pubis syndrome in the elite soccer athlete. Background. Groin injuries can be the most difficult sport injuries to accurately diagnose and treat. Osteitis pubis is a painful, chronic syndrome that affects the symphysis pubis, adductor and abdominal muscles, and surrounding fascia. If misdiagnosed or mismanaged, osteitis pubis can run a prolonged and disabling course. The abdominal and adductor muscles have attachments to the symphysis pubis but act antagonistically to each other, predisposing the symphysis pubis to mechanical traction microtrauma and resulting in osteitis pubis. These antagonistic forces are most prevalent in kicking sports, such as soccer or football. Description: We provide a retrospective review of the demographics, diagnostic criteria and procedures, and conservative management of osteitis pubis in a professional soccer team. Osteitis pubis represented 3% to 5% of all injuries sustained by our professional soccer team between 1989 and 1997; 71.4% of those presenting with osteitis pubis were classified as having stage I disease, with a mean recovery time of 26.7 days. Midfielders were most affected by the syndrome (42.8%), whereas defenders and forwards exhibited equal incidences (25.7%) of osteitis pubis. Conservative management included nonsteroidal anti-inflammatory medication, electric stimulation, ultrasound, laser, cryomassage, and a progressive rehabilitation program. Clinical Advantages: Athletes who participated in this conservative management program appeared to return to full sport participation earlier and with fewer restrictions than the current literature seems to suggest. A 4-stage diagnostic criteria system was helpful in determining the course of treatment MH - Mexico|Distrito Federal MH - USA PB - DALLAS: NATL ATHLETIC TRAINERS ASSOC INC RP - NOT IN FILE U3 - TC 8 U4 - Sport Sciences U5 - J;Article AV - English IS - 1062-6050 UR - ISI:000175747800018 L2 - groin pain;soccer injuries;pubic symphysis;rehabilitation;diagnosis SO - Journal of Athletic Training 2001 ;36(4):437-440 4116 UI - 12838 AU - Rodriguez CA AU - Flessa KW AU - Tellez-Duarte MA AU - Dettman DL AU - vila-Serrano GA AD - Univ Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoFlessa, KW, Univ Arizona, Dept Geosci, Tucson, AZ 85721, USA TI - Macrofaunal and isotopic estimates of the former extent of the Colorado River estuary, upper Gulf of California, Mexico AB - Faunal and isotopic evidence can be used to reconstruct the zone of fresh water influence of the Colorado River prior to its diversion for agricultural and domestic uses. The beaches and islands of the Colorado delta are predominantly composed of shells of the bivalve mollusk Mulinia coloradoensis. The shells date from before the construction of upstream dams, and delta O-18 values from the shells are significantly more negative than delta O-18 values from species living in the delta today. Both faunal and isotopic evidence indicate that M. coloradoensis is a brackish water species that thrived when the river flowed into the Gulf. The proportion of empty shells of XL coloradoensis ranges from 80-95% near the river's mouth to only 25% 65 kin to the south. Shells of the species are rare to absent 80 km south of the mouth of the river. Macrofaunal evidence indicates a mixing zone extending as far as 65 kin along the western shore of the upper Gulf of California. Average delta O-18 values in shells of M. coloradoensis become more positive with increasing distance from the river's mouth, reflecting the greater dilution of river water with normal salinity Gulf water. Average delta O-18 values in the fossil shells approach values in live bivalve mollusks at a distance 65 km south of the mouth of the river indicating that the mixing zone of the former Colorado River extended at least 65 km from its mouth. The effect of virgin Colorado River flow in the upper Gulf of California was geographically extensive. (C) 2001 Academic Press MH - Mexico|Baja California MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000171097000013 L2 - Colorado River delta;Colorado River;oxygen isotopes;bivalve mollusks;Mulinia coloradoensis;Gulf of California;OF-CALIFORNIA SO - Journal of Arid Environments 2001 ;49(1):183-193 4117 UI - 12856 AU - Rodriguez E AU - Lopez-Gonzalez MJ AU - Rolland A AU - Costa V AU - Gonzalez-Bedolla SF AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUNAM, Inst Astron, Mexico City 4510, DF, MexicoRodriguez, E, CSIC, Inst Astrofis Andalucia, POB 3004, E-18080 Granada, Spain TI - Simultaneous uvby photometry of the delta Sct star HD 129231 AB - We present the results of a three-year Stromgren uvby photometric study of the recently discovered multiperiodic low amplitude delta Sct-type pulsator HD 129231. Some additional H-beta-Crawford measurements were also collected. Multiperiodicity is needed to describe the pulsational behaviour of this variable during each of the observing runs. A set of five significant frequencies has been found as the best fitting for the 1997 dataset, but only the two main ones result as significant during the 1995 and 1996 observing runs. Amplitude variations from season to season are also found for the main frequency f(1). Nonradial pulsation is suggested for some of the modes. Using the derived uvby beta indices, the most relevant physical parameters of HD 129231 are also determined placing this object as a hot Population I delta Sct star evolving on its main sequence stage MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171086800016 L2 - stars : variables : delta Scu;stars : individual : HD 129231;stars : oscillations;techniques : photometric;A-TYPE STARS; PULSATING B-STAR; SCUTI STARS; HIPPARCOS PARALLAXES; MODAL DISCRIMINATION; SURFACE GRAVITY; BETA PHOTOMETRY; F-STARS; CALIBRATIONS; LUMINOSITY SO - Astronomy & Astrophysics 2001 ;376(2):489-496 4118 UI - 14121 AU - Rodriguez G AU - Borbolla R AU - Flores L AU - Cortes C AU - Castaneda N AU - Martinez H AU - Villanueva M AU - Pachon H AU - Hurtado E AU - Rivera J AD - Cornell Univ, Ithaca, NY 14850, USAInst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoInst Mexicano Seguro Social, Mexico City, DF, MexicoEmory Univ, Atlanta, GA 30322, USA TI - Nutrient intake, complementary feeding practices, and mothers' beliefs about young children in Central Mexico MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103691 SO - Faseb Journal 2001 ;15(4):A643-A643 4119 UI - 13744 AU - Rodriguez GP AU - Arenas AC AU - Hernandez RAM AU - Stolik S AU - Orea AC AU - Sinencio FS AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, MexicoUniv Francisco de Paula Santander, Cucuta, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07000, DF, MexicoArenas, AC, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Legaria 694,Colonia Irrigac, Mexico City 11500, DF, Mexico TI - Measurement of thermal diffusivity of bone, hydroxyapatite and metals for biomedical application AB - We present a microstructural study and thermal diffusivity measurements at room temperature in two different sections of bull dense bone, bull bone and commercial hydroxyapatite, the last two in powder form. A comparison was made between these measured values and those obtained from metallic samples frequently used in implants such as high purity titanium and 316L stainless steel. Our results show that the porosity and its orientation in the bone are two important factors for the heat flux through the bone. The hydroxyapatite, in compact powder form, presents a thermal diffusivity value very near to those obtained for the bone samples which give a good thermal agreement between these materials. Finally, one order of magnitude of difference among the thermal diffusivity values of metallic samples and those corresponding values to bone and hydroxyapatite was obtained, this difference being greater in titanium than in stainless steel MH - Colombia MH - Mexico|Distrito Federal PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200102 L2 - SILICON; SOLIDS SO - Analytical Sciences 2001 ;17():S357-S360 4120 UI - 12279 AU - Rodriguez JA AU - Takeuchi N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Nacl, Dept Fis, Grp Fis Mat Condensada, Bogota, ColombiaRodriguez, JA, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apdo Postal 2681, Ensenada 22800, Baja California, Mexico TI - First-principles calculations of the adsorption of a single monolayer of GaAs on Si(110) AB - The adsorption of a single monolayer of GaAs on the (110) surface of Si has been studied by first principles total-energy calculations. We have used the density functional theory, within the local density approximation. It is found that As and Ga atoms are adsorbed on Si(110) following a relaxation pattern similar to clean group-III-group-V (110) surfaces. Arsenic atoms move outwards while Ga atoms are pushed down. The surface is ordered, and the periodicity remains (1 X 1). We have also investigated the possible diffusion of Ga and/or As atoms into the Si substrate. Mixed Si-Ga, Si-As or an embedded Ga-As layer are not favorable energetically. The most stable configuration corresponds to the GaAs monolayer on top of the Si(110) substrate. Interchanging the GaAs overlayer by GaSb (with a lattice constant 13% larger than Si) results in a disordered surface MH - Colombia MH - Mexico|Baja California PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000172464600066 L2 - SCANNING-TUNNELING-MICROSCOPY; COMPOUND SEMICONDUCTORS; SURFACE RECONSTRUCTIONS; ELECTRONIC-STRUCTURE; 110 SURFACES; SI; PHOTOEMISSION; SPECTROSCOPY; GASB(110); GEOMETRY SO - Physical Review B 2001 ;6420(20): 4121 UI - 12003 AU - Rodriguez JL AU - Castro PP AD - IPN, CINVESTAV, Saltillo 25000, Coahuila, MexicoCSIC, Inst Ceram & Vidrio, Madrid 28500, SpainRodriguez, JL, IPN, CINVESTAV, Ctra Saltillo Myt Km 13, Saltillo 25000, Coahuila, Mexico TI - Synthesis of magnesia - calcium zirconate - dicalcium silicate materials by reaction sintering of dolomite - zircon mixtures. Processing study AB - The interdependence of green density and particle size and their influence on the reaction sintering behaviour of zircon dolomite powder mixtures were investigated. Powder size was controlled by attrition-milling for different times and was defined as the amperage size obtained by laser particle size analysis. Green compact density was shown to be related to the powder particle size distribution for identical consolidation conditions. Both the green density and the degree of powder agglomeration affect the sinter behaviour over the entire process. The experimental results showed that compacts with similar green density and which contained fewer coarse particles had a better sintering behaviour. The most important controlling parameters are characteristics of the raw materials as particle or agglomerate particle size and particle size distribution, homogeneity and compaction of the raw materials and sintering temperature MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000173184500008 L2 - processing;reaction sintering;dolomite;magnesia;calcium zirconate;microstructure SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2001 ;40(6):463-471 4122 UI - 12099 AU - Rodriguez JL AU - De Aza S AU - Pena P AD - CSIC, Inst Ceram & Vidrio, Madrid 28500, SpainRodriguez, JL, IPN, CINVESTAV, Carr Saltillo Mty Km 13, Saltillo 25000, Coahuila, Mexico TI - Agglomerate and particle size effects on reaction sintering of zircon-dolomite mixtures AB - The interdependence of green density and particle size and their influence on the reaction sintering behaviour of zircon-dolomite powder mixtures under constant heating rate conditions, non-isothermal sintering, were investigated. Powder size was controlled by attrition milling for different times and was defined as the average size obtained by laser particle size analysis. Green compact density, was shown to he related to the powder particle size distribution for identical consolidation conditions. Both the green density and the degree of powder agglomeration affect the sintering behaviour over the entire process. The experimental results showed that compacts with similar green density and which contained fewer coarse particles bad a higher shrinkage rate. BY adequate control of processing parameters it is possible to obtain dense or porous materials. The most important controlling parameters are the particle size of the raw materials and sintering temperature MH - Mexico|Coahuila MH - Spain PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0967-9782 UR - ISI:000172944800008 SO - British Ceramic Transactions 2001 ;100(4):181-191 4123 UI - 14146 AU - Rodriguez JL AU - Rodriguez MA AU - De Aza S AU - Pena P AD - CSIC, Inst Ceram & Vidrio, Madrid 28500, SpainIPN, CINVESTAV, Saltillo, Coahuila, MexicoPena, P, CSIC, Inst Ceram & Vidrio, Madrid 28500, Spain TI - Reaction sintering of zircon-dolomite mixtures AB - Dolomite-zircon mixtures have become interesting for finding alternate sources to improve the production of high magnesia refractories. To asses this option, two minerals, dolomite and zircon were selected, as economically raw materials, to produce MEO-CaZrO3-Ca2SiO4 materials. The reaction sintering mechanism of zircon-dolomite mixtures were investigated using finely ground Spanish dolomite and zircon powders as starting materials. During the heat treatment decomposed dolomite (CaO + MgO) reacts with zircon. from 1000 to 1200 degreesC. through a series of reactions before the final stable compounds are formed. From the results obtained the reaction occurs prior to sintering in the presence of an amorphous transitory phase, magnesium calcium silicate phase and the limiting process during the reaction is the formation of Ca2SiO4. The sintering occurs after the end of the reaction so by controlling the whole process it is possible to obtain materials with controlled porosity. In the present work it is shown that reaction sintering of zircon-dolomite mixtures is a feasible route to obtain MgO-CaZrO3-beta -Ca2SiO4 porous materials for refractory insulators or as filters applications. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 14 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000167402200012 L2 - dolomite;MgO;microstructure-final;reaction sintering;refractories;zircon SO - Journal of the European Ceramic Society 2001 ;21(3):343-354 4124 UI - 12742 AU - Rodriguez M AU - Corradi RLM AU - Mampaso A AD - Inst Nacl Astrofis Opt & Electr, INAOE, Puebla 72000, MexicoIsaac Newton Grp Telescopes, Las Palmas Gran Canaria 38700, SpainInst Astrofis Canarias, Tenerife 38200, SpainRodriguez, M, Inst Nacl Astrofis Opt & Electr, INAOE, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - Evidence for binarity in the bipolar planetary nebulae A 79, He 2-428 and M 1-91 AB - We present low and high resolution long-slit spectra of three bipolar planetary nebulae (PNe) with bright central cores: A 79, He 2-428 and M 1-91. He 2-428 and M 1-91 have high density (from 10(3.3) to 10(6.5) cm(-3)) unresolved nebular cores that indicate that strong mass loss/exchange phenomena are occurring close to their central stars. An F0 star is found at the centre of symmetry of A 79; its reddening and distance are consistent with the association of the star with the nebula. The spectrum of the core of He 2-428 shows indications of the presence of a hot star with red excess emission, probably arising in a late-type companion. A 79 is one of the richest PNe in N and He, the abundances of M 1-91 are at the lower end of the range spanned by bipolar PNe, and He 2-428 shows very low abundances, similar to those measured for halo PNe. The extended nebulae of A 79 and He 2-428 have inclined equatorial rings expanding at a velocity of similar to 15 km s(-1), with kinematical ages greater than or equal to 10(4) yrs. The association of these aged, extended nebulae with a dense nebular core (He 2-428) or a relatively late type star (A 79) is interpreted as evidence for the binarity of their nuclei MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171457900029 L2 - ISM : abundances;ISM : kinematics and dynamics;planetary nebulae : individual : A 79;planetary nebulae : individual : He 2-428 planetary nebulae : individual : M1-91;EXCITATION COLLISION STRENGTHS; ACTIVE GALACTIC NUCLEI; PHYSICAL CONDITIONS; RATE COEFFICIENTS; SYMBIOTIC STARS; FORBIDDEN LINES; EMISSION-LINES; IRON PROJECT; ATOMIC DATA; FE-III SO - Astronomy & Astrophysics 2001 ;377(3):1042-1055 4125 UI - 12473 AU - Rodriguez ME AU - Mendoza PJ AU - Mandelis A AU - Nicolaides L AD - Univ Nacl Autonoma Mexico, Dept Fis Aplicada & Tecnol Avanzada, Queretaro 76001, MexicoUniv Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON M5S 3G8, CanadaRodriguez, ME, Univ Nacl Autonoma Mexico, Dept Fis Aplicada & Tecnol Avanzada, Apdo Postal 0-1010, Queretaro 76001, Mexico TI - Combined photothermal and photoacoustic characterization of silicon-epoxy composites and the existence of a particle thermal percolation threshold AB - Photoacoustic (PA) and photothermal radiometric (PTR) detection were used to characterize thermal properties of silicon-epoxy composite materials in the volume range 0% < x < 32 vol% (50 mum). PA detection was used to study the variation of the thermal diffusivity as a function of Si volume fraction, and PTR was used to determine the influence of the electronic carrier contribution to the thermal transport with the optical properties taken into consideration. The combined PA and PTR measurements show that there exists no linear relation between thermal diffusivity and silicon volume fraction. Thermal diffusivity and optical absorption coefficient measurements can be obtained by means of combined PA and PTR measurements. Both parameters exhibit anomalous behavior in the 16% Si volume fraction range, corroborating the existence of a particle percolation threshold for three-dimensional random close packed (rep) solids. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000171929600014 L2 - thermal diffusivity;composite;percolation;SI WAFERS; CONDUCTIVITY; RADIOMETRY SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2001 ;184(3):421-429 4126 UI - 12888 AU - Rodriguez ME AU - Gutierrez A AU - Zelaya-Angel O AU - Vazquez C AU - Giraldo J AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro 07640, MexicoIPN, Dept Fis, CINVESTAV, Mexico City 07360, DF, MexicoUniv Nacl Colombia, Grp Fis Mat Condensada, Dept Fis, Bogota 60739, ColombiaRodriguez, ME, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Jose Siurob 10,Col Alamedas, Queretaro 07640, Mexico TI - Influence of crystalline quality on the thermal, optical and structural properties of Cd1-xZnxTe for low zinc concentration AB - The configurational crystalline order, closely related to the crystalline quality (CQ) of Cd1-xZnxTe single crystal as a function of x for low values of x (x < 0.08), is studied using X-ray diffraction (XRD) patterns and photoluminescence (PL) spectra. The inverse FWHM of peaks present in diffractograms (XRD-FWHM (1)), as well as the FWHM of PL-peaks (PL-FWHM-1), are related to the CQ of the material. Larger values of XRD-FWHM-1 and PL-FWHM1 mean better CQ of the growth. According to the experimental data, for a composition range of 0 30% with > 20% progression of stenosis measured by visual and quantitative coronary angiography. Stress-echocardiography progressors were defined as those patients who had previously had a negative test of a test having a positive result and those patients who had positive results of tests both in initial testing and in a second session of testing with the latter having a peak wall-motion-score index > 0.12 (on a scale of 1, normal to 4, dyskinetic in a 16-segment model) larger than the former. Results Of the 60 patients, 44 were angiographic 'progressors' and 16 were 'non progressors'. Stress-echocardiographic responses were concordant with angiographic identification for 39 of 44 progressors and 15 of 16 non-progressors, with an overall concordance of 90%. Conclusions Measurement of dipyridamole-stress-echocardiographic response allows one to separate angiographic progressors and non-progressors efficiently, simply by taking into account the presence, extent and severity of stress-induced abnormalities of wall motion. Coron Artery Dis 12:197-204 (C) 2001 Lippincott Williams & Wilkins MH - Hungary MH - Italy MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0954-6928 UR - ISI:000168488000006 L2 - dipyridamole stress echocardiography;non-invasive prediction;coronary artery disease progression;POSITRON EMISSION TOMOGRAPHY; LOW-FAT DIET; MYOCARDIAL PERFUSION; DOBUTAMINE STRESS; ANGINA-PECTORIS; LONG-TERM; EVENTS; ATHEROSCLEROSIS; ABNORMALITIES; MORPHOLOGY SO - Coronary Artery Disease 2001 ;12(3):197-204 4131 UI - 11958 AU - Rogel-Hernandez E AU - Licea-Claverie A AU - Cornejo-Bravo JM AU - Arndt KF AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoTech Univ Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, GermanyUniv Autonoma Baja California, Fac Ciencias Quim & Ingn, Tijuana, BC 22300, CanadaLicea-Claverie, A, Inst Tecnol Tijuana, Ctr Grad & Invest, AP 1166, Tijuana 22000, BC, Mexico TI - Synthesis and polymerization of carboxyalkylmethacrylates: new hydrophobic polyelectrolytes AB - This paper describes the synthesis of the following methacrylic acid monomers with aliphatic spacers: methyl methacryloyloxyethanoate (MMOE), methyl 4-methacryloyloxybutanoate (M4MOB), methyl 6-methacryloyloxyhexanoate (M6MOH), methyl 10-methacryloyloxydecanoate (M10MOD), and methyl 111-methacryloyloxyundecanoate (M11MOU). The preparation of the respective linear polymers from these monomers, their characterization, and their conversion, via selective saponification, to five new hydrophobic polyelectrolytes are also described. With an increasing number of methylene spacers, the glass transition temperature of the polymers drops, as well as that of the polyelectrolytes, yielding polymeric materials with varied physical states. The developed hydrophobic polyelectrolytes show cloud points in aqueous NaCl solutions at different pH values, making them potential candidates for new pH-sensitive materials MH - Canada MH - Germany MH - Mexico|Baja California PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 1385-772X UR - ISI:000173347100005 L2 - polyelectrolytes;polymethacrylates;pH-sensitive polymers;methacrylic acid derivatives;POLY(ACRYLIC ACID); METHACRYLATE SO - Designed Monomers and Polymers 2001 ;4(4):343-356 4132 UI - 13382 AU - Rogel MA AU - Hernandez-Lucas I AU - Kuykendall LD AU - Balkwill DL AU - Martinez-Romero E AD - UNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoInst Plant Sci, Mol Plant Pathol Lab, Beltsville, MD 20705, USAFlorida State Univ, Dept Biol Sci, Tallahassee, FL 32306, USAMartinez-Romero, E, UNAM, Ctr Invest Fijac Nitrogeno, Ap P 565-A, Cuernavaca, Morelos, Mexico TI - Nitrogen-fixing nodules with Ensifer adhaerens harboring Rhizobium tropici symbiotic plasmids AB - Ensifer adhaerens is a soil bacterium that attaches to other bacteria and may cause lysis of these other bacteria. Based on the sequence of its small-subunit rRNA gene, E, adhaerens is related to Sinorhizobium spp, E. adhaerens ATCC 33499 did not nodulate Phaseolus vulgaris (bean) or Leucaena leucocephala, but with symbiotic plasmids from Rhizobium tropici CFN299 it formed nitrogen-fixing nodules on both hosts. The nodule isolates were identified as E, adhaerens isolates by growth on selective media MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000169605400054 L2 - 16S RIBOSOMAL-RNA; PHASEOLUS-VULGARIS; AGROBACTERIUM-TUMEFACIENS; SP-NOV; LEGUMINOSARUM; NODULATION; GENES; SOIL; IDENTIFICATION; SEQUENCES SO - Applied and Environmental Microbiology 2001 ;67(7):3264-3268 4133 UI - 14032 AU - Rojas-Espinosa O AU - Lovik M AD - Natl Polytech Inst Carpio & Plan Ayala, Natl Sch Biol Sci, Dept Immunol, Mexico City 11340, DF, MexicoNatl Inst Publ Hlth, Dept Environm Med, N-0403 Oslo, NorwayRojas-Espinosa, O, Natl Polytech Inst Carpio & Plan Ayala, Natl Sch Biol Sci, Dept Immunol, Mexico City 11340, DF, Mexico TI - Mycobacterium leprae and Mycobacterium lepraemurium infections in domestic and wild animals AB - Mycobacterium leprae, the aetiologlical agent of leprosy in humans, gives rise to a chronic granulomatous disease that affects primarily the skin and peripheral nerves, and secondarily same internal organs such as the testis and the eye; viscera are seldom involved. Depending on host resistance, leprosy may present as a benign disease (tuberculoid leprosy) or as a malignant disease (lepromatous leprosy), with a spectrum of intermediate stages appearing between the two. immunity against leprosy depends an the cell-mediated immunity of the host, and this is severely compromised in the malignant (lepromatous) form of leprosy. Although culture of M. leprae has never been achieved in artificial media, the bacterium may be grown in several experimental animals, including the armadillo, non-human primates, and to a certain extent, rodents. Naturally acquired leprosy has been reported in wild nine-branded armadillos (Dasypus novemcinctus) and in three species of non-human primates (chimpanzees [Pan troglodytes], sooty mangabey monkeys [Cercocebus atys] and cynomolgus macaques [Macaca fascicularis]), thus qualifying leprosy as a zoonosis. Murine leprosy is a leprosy-like disease of rats and mice, caused by Mycobacterium lepraemurium. The disease affects primarily viscera and the skin, and very rarely peripheral nerves. Depending on the host strain, rodent leprosy may also evolve as 'lepromatous' or 'tuberculoid' leprosy, and strains of mouse that develop intermediate forms of the disease may exist. Growth of M. lepraemurium on conventional media for mycobacteria is not successful, but the bacterium has been cultured on an egg yolk-based medium. Naturally acquired murine leprosy has been observed in rats, mice and eats, but not in humans or any other species. Thus, in contrast to human leprosy, murine leprosy is not a zoonosis MH - Mexico|Distrito Federal MH - Norway PB - PARIS: OFFICE INT EPIZOOTIES RP - NOT IN FILE U3 - TC 7 U4 - Veterinary Sciences U5 - J;Review AV - English IS - 0253-1933 UR - ISI:000167711200012 L2 - canine leprosy;feline leprosy;leprosy;murine leprosy;Mycobacterium leprae;Mycobacterium lepraemurium;zoonoses;LEPROSY-LIKE DISEASE; T-CELL CLONE; NATURALLY ACQUIRED LEPROSY; RECEPTOR-POSITIVE CELLS; SOOTY MANGABEY MONKEYS; PHENOLIC GLYCOLIPID-I; DOSE CONVIT VACCINE; MURINE LEPROSY; LEPROMATOUS LEPROSY; INTERFERON-GAMMA SO - Revue Scientifique et Technique de l Office International des Epizooties 2001 ;20(1):219-251 4134 UI - 13842 AU - Rojas A AU - Holguin G AU - Glick BR AU - Bashan Y AD - Ctr Biol Res NW CIB, La Paz 23000, Baja Calif Sur, MexicoUniv Waterloo, Dept Biol, Waterloo, ON N2L 3G1, CanadaBashan, Y, Ctr Biol Res NW CIB, AP 128, La Paz 23000, Baja Calif Sur, Mexico TI - Synergism between Phyllobacterium sp (N-2-fixer) and Bacillus licheniformis (P-solubilizer), both from a semiarid mangrove rhizosphere AB - Mangrove seedlings were treated with a mixture of two bacterial species, the slow-growing, N-2-fixing bacterium Phyllobacterium sp. and the fast-growing, phosphate-solubilizing bacterium Bacillus licheniformis, both isolated from the rhizosphere from black, white, and red mangroves of a semiarid zone. Nitrogen fixation and phosphate solubilization increased when the mixture was used compared to the effects observed when adding individual cultures, notwithstanding that there was no increase in bacterial multiplication under these conditions. Inoculation of black mangrove seedlings in artificial seawater showed the mixture performed somewhat better than inoculation of the individual bacterium; more leaves were developed and higher It levels of N-15 were incorporated into the leaves, although the total nitrogen level decreased. This study demonstrates that interactions between individual components of the rhizosphere of mangroves should be considered when evaluating these bacteria as Plant growth promoters. (C) 2001 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0168-6496 UR - ISI:000168302800009 L2 - mangrove;mutualism;nitrogen fixation;phosphate solubilization;plant growth-promoting bacterium;Phyllobacterium;Bacillus licheniformis;BICOLOR L MOENCH; NITROGEN-FIXATION; AZOSPIRILLUM-BRASILENSE; MIXED CULTURES; FILAMENTOUS CYANOBACTERIA; ACETYLENE-REDUCTION; STAPHYLOCOCCUS SP; MARINA COMMUNITY; ORGANIC-MATTER; BACTERIA SO - Fems Microbiology Ecology 2001 ;35(2):181-187 4135 UI - 13517 AU - Rojas F AU - Puri S AU - Bray AJ AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoJawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, IndiaUniv Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, EnglandRojas, F, UNAM, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - Kinetics of phase ordering in the O(n) model with a conserved order parameter AB - We study the phase-ordering dynamics of the O(n) model with a conserved order parameter for systems with topological defects. We present results from both cell dynamical simulations and predictions of a Gaussian auxiliary field (GAF) approximation for the XY (n = 2) model in two and three dimensions, and the Heisenberg (n = 3) model in three dimensions. We describe the results for the structure factor S(q) and growth law L(t) from simulations. The growth laws obtained are consistent with theoretical predictions based on energy-scaling arguments. The structure factor shows good dynamical scaling using a length extracted from its first moment. The simulations are compared with the theoretical predictions of the GAF for the scaling functions. Our results show that the GAF gives a good qualitative description of most features of the structure factor. However, it overestimates the amplitude of the Pored tail in the large-q limit. Moreover, for small q, the structure factor exhibits a q(2)-behaviour instead of the expected (generalized) Yeung result of q(4) MH - United Kingdom MH - India MH - Mexico|Baja California PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000169140800006 L2 - CELL DYNAMICAL-SYSTEMS; SEPARATION DYNAMICS; CONTINUOUS SYMMETRY; UNSTABLE GROWTH; APPROXIMATIONS; LAWS SO - Journal of Physics A-Mathematical and General 2001 ;34(19):3985-4002 4136 UI - 13600 AU - Rojas JC AU - Wyatt TD AU - Birch MC AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Oxford, Dept Zool, Oxford OX1 3PS, EnglandRojas, JC, El Colegio Frontera Sur, Ap Postal 36, Tapachula 30700, Chiapas, Mexico TI - Oviposition by Mamestra brassicae (L.) (Lep., Noctuidae) in relation to age, time of day and host plant AB - The age at which females begin to lay, the daily pattern of oviposition, the influence of host-plant material on egg-laying as well as the host preference of Mamestra brassicae L. (Lep.. Noctuidae) were investigated under laboratory conditions. The females began to oviposit during the third, fourth and fifth scotophase after emergence. A great variability in daily female fecundity was observed. The highest level of oviposition occurred during the fifth day. Females oviposited during the whole scotophase, but maximal oviposition occurred during the second hour. The females without host-plant material laid fewer eggs than females with host-plant material (cabbage leaves Brassica oleracea var, capitata). In two-choice tests, the females preferred to oviposit on cabbage rather than chrysanthemum, but there was no difference in the mean number of eggs laid on cabbage and tomato. There were significantly greater mean numbers of total eggs deposited on tomato than on chrysanthemum MH - United Kingdom MH - Mexico|Chiapas PB - BERLIN: BLACKWELL WISSENSCHAFTS-VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0931-2048 UR - ISI:000168945500011 L2 - HAIR-PENCILS; LEPIDOPTERA; COURTSHIP; BEHAVIOR SO - Journal of Applied Entomology-Zeitschrift fur Angewandte Entomologie 2001 ;125(3):161-163 4137 UI - 13309 AU - Rojas M AU - Conway PL AD - Gothenburg Univ, Dept Gen & Marine Microbiol, S-41390 Gothenburg, SwedenUniv Autonoma Baja Calif Sur, La Paz, Baja Calif Sur, MexicoUniv New S Wales, Sch Microbiol & Immunol, CRC Food Ind Innovat, Sydney, NSW 2052, AustraliaRojas, M, Gothenburg Univ, Dept Gen & Marine Microbiol, S-41390 Gothenburg, Sweden TI - A dot-blot assay for adhesive components relative to probiotics MH - Australia MH - Mexico|Baja California Sur MH - Sweden PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology U5 - S;Review AV - English IS - 0076-6879 UR - ISI:000169760800031 L2 - ENTEROTOXIGENIC ESCHERICHIA-COLI; PROTEIN-MEDIATED ADHESION; SMALL-INTESTINAL MUCUS; O157-H7 STRAIN CL-49; SALMONELLA-TYPHIMURIUM; SQUAMOUS EPITHELIUM; BINDING; MUCIN; RECEPTORS; SURFACE SO - Microbial Growth in Biofilms, Pt A R Biological Aspects 2001 ;336():389-402 4138 UI - 12077 AU - Roman-Contreras R AU - Bourdon R AD - Natl Autonomous Univ Mexico, Inst Ciencias Mar & Limnol, Lab Parasitol Marina, Mexico City 04510, DF, MexicoImpasse Corbiere 1, F-29680 Roscoff, FranceRoman-Contreras, R, Natl Autonomous Univ Mexico, Inst Ciencias Mar & Limnol, Lab Parasitol Marina, POB 70-305, Mexico City 04510, DF, Mexico TI - Probopyrus insularis, a new species (Isopoda : Bopyridae), a parasite of Macrobrachium faustinum (Saussure de, 1857) (Decapoda : Palaemonidae), with criteria to differentiate species of Probopyrus AB - Probopyrus insularis n. sp. parasiting (Saussure de. 1857) from the Caribbean Islands is mainly distinguished by the shape of the: pleotelson in both sexes; carina of the seventh legs in females; palp of the maxillipeds in females: and pleon in males. Characters used to distinguish species of Probopyrus Giard & Bonnier, 1888 are discussed MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000172948000009 L2 - FRESH-WATER SHRIMP; GUADELOUPE-ISLAND; PACIFIC COAST; CARIDEA; MIGRATION; STREAM SO - Proceedings of the Biological Society of Washington 2001 ;114(4):918-928 4139 UI - 12930 AU - Romero-Rojas A AU - Ponce-Hernandez C AU - Ciprian A AU - Estrada-Parra S AU - Hadden JW AD - Univ S Florida, Coll Med, Dept Med, Div Immunopharmacol, Tampa, FL 33612, USANatl Polytech Inst, ENCB, Dept Immunol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Higher Studies Cuautitlan, Grad Studies Dept, Cuautitlan 5470, Mexico, MexicoRomero-Rojas, A, Unidad Mil, Av Nicolas Bravo Edif B1-5 Dpto 202, Cuautitlan 54750, Mexico, Mexico TI - Immunomodulatory properties of Mycoplasma pulmonis. I. Characterization of the immunomodulatory activity AB - For many years, it has been recognized that Mycoplasma infection affects the host's immune system in different ways. In this work, experiments were performed to characterize the influence of Mycoplasma pulmonis infection on various immunological parameters and to follow the kinetics of their variations. A Balb/c mouse model was used to assess hematological evaluations, changes in spleen weight, antibody responses against sheep erythrocytes, neutrophil phagocytosis, colloidal carbon clearance, and anti-Mycoplasma antibody responses. At the hematological level, infected animals were found to have significantly increased total lymphocyte and polymorphonuclear leukocyte counts and an augmentation in spleen weight. Seven days after Mycoplasma infection, antibody responses against sheep erythrocytes were considerably diminished, and at days 7 and 14 after infection, phagocytic activity was also reduced. After I week of infection, the colloidal carbon clearance pattern was decreased, and during the whole infectious process, anti-Mycoplasma antibody titers were found to be low. Results from this part of research show a persistent infection that does not resolve in a short period, which is associated with a general dysfunction in the immune system and poor immune responses against several different antigens. (C) 2001 Elsevier Science BN. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1567-5769 UR - ISI:000170818500004 L2 - Mycoplasma;immunomodulation;phagocytosis;Mycoplasma infection;TUMOR-NECROSIS-FACTOR; LYMPHOCYTES; INDUCTION; MITOGEN; PROTEIN; ARTHRITIDIS; ACTIVATION SO - International Immunopharmacology 2001 ;1(9-10):1679-1688 4140 UI - 12931 AU - Romero-Rojas A AU - Ponce-Hernandez C AU - Mendoza SE AU - Reyes-Esparza JA AU - Estrada-Parra S AU - Hadden JW AD - Univ S Florida, Coll Med, Dept Med, Div Immunopharmacol, Tampa, FL 33612, USANatl Polytech Inst, ENCB, Dept Immunol, Mexico City, DF, MexicoUniv Autonoma Morelos, Sch Pharm, Cuernavaca, Morelos, MexicoUniv Nacl Autonoma Mexico, Fac Higher Studies Cuautitlan, Grad Studies Dept, Cuautitlan 54750, Mexico, MexicoRomero-Rojas, A, Unidad Mil, Av Nicolas Bravo Edif B1-5 Dpto 202, Cuautitlan 54750, Mexico, Mexico TI - Immunomodulatory properties of Mycoplasma pulmonis. II. Studies on the mechanisms of immunomodulation AB - Mycoplasma infection affects the host's immune system in different ways. In this work, a kinetic approach was used to try to determine the mechanisms by which Mycoplasma cause these effects. Experiments were performed using Balb/c mice infected with Mycoplasma pulmonis and several immunological parameters were determined. It was found that at days 10 and 15 post-infection, there were significant changes in the percentages of CD4 + and CD8 + cells, in both peripheral blood and the thymus. Significant sequential increases in concentrations of both IFN-gamma and IL-4 were detected in sera, such that at day 15, there was a peak in IFN-gamma concentration and at day 38, IL-4 concentration also peaked. By day 46, both IFN-gamma and IL-4 fell to control levels despite continued infection. Delayed hypersensitivity (DTH) was reduced in infected animals compared to non-infected controls. A small recovery in DTH was observed at day 30, which was reduced again by day 40. Altogether, the results show features of a transitional shift from Th-1 to Th-2 in animals that are ultimately immunologically incompetent (in both cellular and humoral immunity). It appears to be this state of incompetence that allows the microorganism to survive and thus provides an explanation for the chronic state of the disease, which is a characteristic of Mycoplasma infection. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1567-5769 UR - ISI:000170818500005 L2 - Mycoplasma;immunomodulation;CD4+/CD8+;lymphocytes;Th-1;Th-2;delayed-type hypersensitivity;DTH;CELL SO - International Immunopharmacology 2001 ;1(9-10):1689-1697 4141 UI - 12932 AU - Romero-Rojas A AU - Reyes-Esparza J AU - Estrada-Parra S AU - Hadden JW AD - Univ S Florida, Coll Med, Dept Med, Div Immunopharmacol, Tampa, FL 33612, USANatl Polytech Inst, IPN, ENCB, Dept Immunol, Mexico City, DF, MexicoAutonomous Univ Morelas, Sch Pharm, Cuernavaca, Morelos, MexicoUniv Nacl Autonoma Mexico, Fac Higher Studies Cuautitlan, Grad Studies Dept, Cuautitlan 54750, Mexico, MexicoRomero-Rojas, A, U Mil, Av Nicola Bravo Edif,B1-5 Depto 202, Cuautitlan 54750, Mexico, Mexico TI - Immunomodulatory properties of Mycoplasma pulmonis. III. Lymphocyte stimulation and cytokine production Mycoplasma pulmonis products AB - Experiments are presented that were performed in order to understand the mechanisms causing these effects on the immune system. Mitogenic effects of Mycoplasma membranes on mouse spleen cells were shown using M. capricolum. The observed mitogenic a(c)tivity is proportional to the amount of membranes used. as measured by protein content. Separation of T and B cells was per-formed by two techniques. the anti-Thy1.2 plus complement method and the Dynabead technique. Using the former technique, it was shown that removal of T cells markedly reduced effects of stimulation by mycoplasma membranes, but did not abolish it. The separated cells were still stimulated by PHA, indicating that the preparation still contained T cells. Furthermore. removal of T cells preferentially reduced the PHA response over that of mycoplasma membranes, indicating that mycoplasma membranes stimulate both B and T lymphocytes. The Dynabead system was found to be the more efficient separation technique, and by using it we were able to make the following observations. Inactivated Mp, membranes and culture supernatant stimulated B cells. whereas T cells were only slightly stimulated by inactivated Mp and membranes. There was an increase in proliferation when T cells were incubated with adherent cells from peripheral blood. Finally. we showed that spleen cells from infected animals produce more IL-4 and less IFN-gamma than cells from non-infected animals when stimulated with membranes, inactivated Mp, culture supernatant or phytohemagglutinin. Altogether, these results show that lymphocytes from Mycoplasma-infected animals are directly affected and this effect is probably due to superantigen-like molecules from M. pulmonis. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1567-5769 UR - ISI:000170818500006 L2 - Mycoplasma;immunomodulation;mitogenicity;interleukin;cytokine;IL-4;IFN-gamma;TUMOR-NECROSIS-FACTOR; INDUCTION; ARTHRITIDIS; PROTEIN; MITOGEN; MAS SO - International Immunopharmacology 2001 ;1(9-10):1699-1707 4142 UI - 12767 AU - Romero J AU - Bruce S AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoConcepcion Univ, Dept Fis, Concepcion, ChileRomero, J, Univ Guadalajara, Dept Fis, Corregidora 500, Guadalajara 44420, Jalisco, Mexico TI - Classical electrodynamics from a generalised field-strength tensor AB - We exploit some symmetries in Maxwell-Lorentz's equations by completing some vacancies of (independent) scalar field content. To this end, we consider three steps: 1) Maxwell's equations in vacuum constitute a set of eight partial differential equations; six EM field component variables; and the sources have four electric current components. 2) Once magnetic monopoles are included, we study whether this system can include two new EM-like scalar fields so that a full symmetry may be accomplished, i.e., 3) [n(S), n(F), n(D)]((c)) = [8,8,8], where n(S), n(F), n(D) indicate the number of independent sources, fields, and partial differential equations. After solving some basic problems by following standard procedures, we comment on the various procedures to accomplish second quantization MH - Chile MH - Mexico|Jalisco PB - SIENA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0369-3554 UR - ISI:000171281700007 SO - Nuovo Cimento Della Societa Italiana di Fisica B-General Physics Relativity Astronomy and Mathematical Physics and Methods 2001 ;116(5):547-554 4143 UI - 12998 AU - Romero MT AU - Rodriguez JA AU - Takeuchi N AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Nacl Colombia, Dept Fis, Grp Fis Mat Condensada, Sede Bogota, ColombiaRomero, MT, Ctr Invest Cient & Educ Super Ensenada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - First-principles calculations of the adsorption of S on the Si(001)c(4X2) surface AB - The adsorption of S on the Si(001)c(4 x 2) surface is studied by first-principles total-energy calculations. We started with the adsorption of a single atom up to a full-monolayer coverage. The first S atom occupies a bridge site, on top of a Si dimer that becomes completely symmetric. At half-monolayer coverage, all bridge sites are occupied, and all Si dimers become symmetric. The overall periodicity is (2 x 1). The adsorption of an additional S atom results in the breaking of two Si dimers. From this point and up to one monolayer, it is energetically more favorable for the S atoms to be adsorbed along the [(1) over bar 10] direction. At full monolayer coverage, all Si dimers are broken, and the Si surface is dereconstructed with all Si atoms near bulk ideal positions MH - Colombia MH - Mexico|Baja California PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000170500900074 L2 - SI(100) SURFACE; ELEMENTAL S; GE(001); RESTORATION; AL; PSEUDOPOTENTIALS; RECONSTRUCTIONS; TELLURIUM; DYNAMICS; INDIUM SO - Physical Review B 2001 ;64(7):art-075317 4144 UI - 11957 AU - Romieu I AU - Trenga C AD - Natl Inst Publ Hlth, Ctr Populat Studies, Cuernavaca 62508, Morelos, MexicoPan Amar Hlth Org, Cuernavaca, Morelos, MexicoUniv Washington, Dept Environm Hlth, Seattle, WA 98195, USARomieu, I, Natl Inst Publ Hlth, Ctr Populat Studies, Ave Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Diet and obstructive lung diseases MH - Mexico|Morelos MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 51 U4 - Public, Environmental & Occupational Health U5 - J;Review AV - English IS - 0193-936X UR - ISI:000173410700005 L2 - NUTRITION-EXAMINATION-SURVEY; FRESH FRUIT CONSUMPTION; RANDOM ADULT-POPULATION; FIRST NATIONAL-HEALTH; VITAMIN-C INTAKE; MIDDLE-AGED MEN; SURVEY NHANES-I; PULMONARY-FUNCTION; RESPIRATORY SYMPTOMS; BRONCHIAL-ASTHMA SO - Epidemiologic Reviews 2001 ;23(2):268-287 4145 UI - 13979 AU - Romo FC AU - Goutaudier C AU - Guyot Y AU - Cohen-Adad MT AU - Boulon G AU - Lebbou K AU - Yoshikawa A AU - Fukuda T AD - Univ Lyon 1, Lab Physicochim Mat Luminescents, CNRS, UMR 5620, F-69622 Villeurbanne, FranceInst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 07738, DF, MexicoTohoku Univ, Inst Mat Res, Sendai, Miyagi 980, JapanGoutaudier, C, Univ Lyon 1, Lab Physicochim Mat Luminescents, CNRS, UMR 5620, 43 Bd 11 Novembre 1918, F-69622 Villeurbanne, France TI - Yb3+-doped Ba2NaNb5O15 (BNN) growth, characterization and spectroscopy AB - Low-temperature spectroscopy of host barium sodium niobate - Ba2NaNb5O15 (BNN) crystal fibers doped with Yb3+ ion has been studied. The fibers were grown by the laser-heated pedestal growth (LHPG) technique, and were characterized among others by X-ray diffraction, micro-Raman spectroscopy, X-ray fluorescence and optical microscopy. The results showed very homogeneous and defect-free materials with pseudotetragonal structure appropriate for optical applications. Absorption and emission spectroscopic studies at low temperature were used to determine the energy-level diagram of the Yb3- ion in host BNN. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000167805700028 L2 - SINGLE-CRYSTAL FIBERS; HEATED PEDESTAL GROWTH; BARIUM SODIUM NIOBATE; FERROELASTIC TRANSITION; OPTICAL FIBERS SO - Optical Materials 2001 ;16(1-2):199-206 4146 UI - 13239 AU - Romo R AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoSalk Inst Biol Studies, Howard Hughes Med Inst, Computat Neurobiol Lab, La Jolla, CA 92037, USARomo, R, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, Mexico TI - Touch and go: Decision-making mechanisms in somatosensation AB - A complex sequence of neural events unfolds between sensory receptor activation and motor activity. To understand the underlying decision-making mechanisms linking somatic sensation and action, we ask what components of the neural activity evoked by a stimulus are directly related to psychophysical performance, and how are they related. We find that single-neuron responses in primary and secondary somatosensory cortices account for the observed performance of monkeys in vibrotactile discrimination tasks, and that neuronal and behavioral responses covary in single trials. This sensory activity, which provides input to memory and decision-making mechanisms, is modulated by attention and behavioral context, and microstimulation experiments indicate that it may trigger normal perceptual experiences. Responses recorded in motor areas seem to reflect the output of decision-making operations, which suggests that the ability to make decisions occurs at the sensory-motor interface MH - Mexico|Distrito Federal MH - USA PB - PALO ALTO: ANNUAL REVIEWS RP - NOT IN FILE U3 - TC 61 U4 - Neurosciences U5 - J;Review AV - English IS - 0147-006X UR - ISI:000170109100005 L2 - somatosensory cortex;discrimination;categorization;working memory;cortical microstimulation;attention;SOMATIC SENSORY CORTEX; PRIMARY MOTOR CORTEX; DORSOLATERAL PREFRONTAL CORTEX; CONTRASTING NEURONAL-ACTIVITY; FREE ARM MOVEMENTS; FRONTAL-CORTEX; MONKEY PRIMARY; BASAL GANGLIA; AREA 3B; PSYCHOPHYSICAL MEASUREMENTS SO - Annual Review of Neuroscience 2001 ;24():107-137 4147 UI - 12743 AU - Rosado M AU - de la Fuente E AU - Arias L AU - Raga A AU - Le Coarer E AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoObserv Grenoble, Grenoble, FranceRosado, M, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Kinematics of Herbig-Haro objects and jets in the Orion Nebula AB - We have surveyed the inner 5' of the Orion Nebula by means of Ha and [N II] Fabry-Perot imaging spectroscopy to present a kinematical study of the Herbig-Haro objects in the nebula. The objects studied in this work are HH 202, 203, 204, 529, 269, and other associated features. For HH 202 we find new features that, because of their high velocities (up to 100 km s(-1)), indicate the presence of an outflow that probably is an HH flow not cataloged previously. HH 202 could be only a part of this larger outflow. Large internal motions are found in the fainter regions of HH 203-204, as well as evidence of transverse density gradients that could account for the asymmetry in the brightness distribution of HH 204. We report for the first time a high blueshifted velocity (-118 km s(-1)) associated with HH 204 and show that the apex of HH 204 is indeed the zone of maximum velocity, in agreement with bow shock models. We also studied the radial velocity field of HH 269, finding features associated with the HH object. From our studies, we find kinematic evidence that suggests HH 203-204 and HH 202 are part of a big (similar to0.55 pc) bipolar HH outflow MH - France MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000171420700022 L2 - ISM : individual (Orion Nebula);stars : formation;stars : individual (HH 202, HH 203, HH 204;HH 269);stars : mass loss;SPACE-TELESCOPE IMAGES; HIGH-VELOCITY FEATURES; DISCOVERY; MOTION; DISKS; FLOW; CORE; M42 SO - Astronomical Journal 2001 ;122(4):1928-1937 4148 UI - 13238 AU - Rosado M AU - Valdez-Gutierrez M AU - Georgiev L AU - Arias L AU - Borissova J AU - Kurtev R AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Pue, MexicoBulgarian Acad Sci, Astron Inst, BG-1784 Sofia, BulgariaRosado, M, Natl Autonomous Univ Mexico, Inst Astron, Apdi Postal 70-264, Mexico City 04510, DF, Mexico TI - The influence of massive stars in the interstellar medium of IC 1613: The supernova remnant S8 and the nebula S3 associated with a WO star AB - We present a detailed kinematic analysis of two selected nebulae in the Local Group irregular galaxy IC 1613. The nebulae are S8, the only known supernova remnant in this galaxy, and S3, a Wolf-Rayet nebula associated with the only WO star in this galaxy. For S8 we have obtained and analyzed its radial velocity field, where we found complex profiles that can be fitted by several velocity components. These profiles also show the presence of high-velocity, low-density gas. From this we have obtained the expansion velocity, estimated the preshock density, and calculated the basic kinematic parameters of this supernova remnant (SNR). We suggest that in S8 we are seeing an SNR partially hidden by dust. This suggestion comes from the fact that the SNR is located between two superbubbles where a ridge of obscured material reveals the existence of dust. Moreover, we show that this hypothesis prevails when arguments based on energy are taken into account. In the case of S3 this nebula shows bipolar structure. By using its kinematics, we have analyzed its two lobes and its "waist," II as well as its relation with the nearest superbubbles. For the first time we are able to see that the northwestern lobe is closed, showing a cloverleaf shape. This fact allows us to obtain a better quantitative knowledge of the nebula as a whole. Furthermore, we found evidence of expansion in the northwestern lobe. In the light of our results, we can state that these nebulae are the product of very massive stellar evolution. The influence these stars still have in shaping their surrounding gas is surprising and so is the energy liberated to the interstellar medium of this galaxy MH - Bulgaria MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000169943300014 L2 - galaxies : individual : IC 1613;galaxies : irregular;ISM : individual (Sandage 3, Sandage 8);ISM : kinematics and dynamics;supernova remnants;BVRI CCD PHOTOMETRY; STELLAR CONTENT; GALAXY IC-1613; RAYET STARS; NEARBY GALAXIES; RADIO SO - Astronomical Journal 2001 ;122(1):194-206 4149 UI - 13206 AU - Rosales JJ AU - Tkach VI AU - Pashnev AI AD - Univ Guanajuato, Inst Fis, Leon 37150, Gto, MexicoJoint Inst Nucl Res Dubna, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, RussiaRosales, JJ, Univ Guanajuato, Inst Fis, Apartado Postal E-143, Leon 37150, Gto, Mexico TI - On the Schrodinger equation for the supersymmetric FRW model AB - We consider a time-dependent Schrodinger equation for the Friedmann-Robertson-Walker (FRW) model. We show that for this purpose it is possible to include an additional action invariant under reparametrization of time. The last one does not change the equations of motion for the minisuperspace model, but changes only the constraint. The same procedure is applied to the supersymmetric case. (C) 2001 Published by Elsevier Science BN MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000170096200004 L2 - QUANTUM-GRAVITY; COSMOLOGICAL CONSTANT; WAVE-FUNCTION; SUPERGRAVITY; SYMMETRY; BREAKING; TIME SO - Physics Letters A 2001 ;286(1):15-24 4150 UI - 12389 AU - Rosas C AU - Lopez N AU - Mercado P AU - Martinez E AD - UNAM, Fac Ciencias, Lab Biol Marina Expt, Mexico City, DF, MexicoUniv Ctr Amer, Ctr Invest Camaron, Managua, NicaraguaRosas, C, UNAM, Fac Ciencias, Lab Biol Marina Expt, Apdo Postal 69 Cd Del Carmen, Mexico City, DF, Mexico TI - Effect of salinity acclimation on oxygen consumption of juveniles of the white shrimp Litopenaeus vannamei AB - The present study was undertaken to establish the effect of salinity and acclimation time on the oxygen consumption of juvenile white shrimp Litopenaeus vannamei through evaluation of the mechanisms involved in adjustments of respiratory metabolism during acclimation and the effects on the apparent heat increment (AHI). Four experiments were conducted to assess the effect of acclimation time on oxygen consumption of shrimp exposed to salinity changes between 30 parts per thousand to 5 parts per thousand. The effects of a change of salinity were recorded immediately in the first hour and 24 h after change. The results showed that L. vannamei juveniles are well adapted to tolerate salinity changes when they are subjected to sudden change in salinity or are acclimated to salinity change. The effect of salinity on the apparent heat-increment coefficient (AHI-%) in shrimp acclimated over time was also tested. The fasting and feeding oxygen consumptions were increased according to a reduction in salinity, with high values in 5 parts per thousand and lower values in 30 parts per thousand. Although at 15 parts per thousand salinity the animals require energy to maintain homeostasis, we believe the juveniles acclimated at that salinity could be more efficient than those acclimated at 5 parts per thousand or 30 parts per thousand salinity because in that salinity shrimp consumed 1.22 and 1.69 more food than that observed in shrimp acclimated at 30 parts per thousand and 5 parts per thousand, respectively, and without an excessive increase in the costs associated with AHI-% MH - Mexico|Distrito Federal MH - Nicaragua PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 8 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000172114500006 L2 - CRABS CALLINECTES-SAPIDUS; PENAEUS-SETIFERUS; NITROGEN-EXCRETION; DISSOLVED-OXYGEN; HEAT INCREMENT; BROWN SHRIMP; GRASS SHRIMP; TEMPERATURE; POSTLARVAE; SURVIVAL SO - Journal of Crustacean Biology 2001 ;21(4):912-922 4151 UI - 13293 AU - Rosas C AU - Cuzon G AU - Taboada G AU - Pascual C AU - Gaxiola G AU - van Wormhoudt A AD - UNAM, Grp Biol Marina Expt, Lab Ecofisiol, Fac Ciencias, Campeche, MexicoIFREMER, Ctr Oceanol Pacific, Taravao, Tahiti, Fr PolynesiaMuseum Natl Hist Nat, Stn Biol Marine, F-29900 Concarneau, FranceColl France, F-29900 Concarneau, FranceRosas, C, UNAM, Grp Biol Marina Expt, Lab Ecofisiol, Fac Ciencias, Apdo Post 69,Cd Carmen, Campeche, Mexico TI - Effect of dietary protein and energy levels on growth, oxygen consumption, haemolymph and digestive gland carbohydrates, nitrogen excretion and osmotic pressure of Litopenaeus vannamei (Boone) and L-setiferus (Linne) juveniles (Crustacea, Decapoda; Penaeidae) AB - The influence of protein and energy levels on growth rate, survival. pre- and post-prandial oxygen consumption. ammonia excretion, haemolymph glucose (HG), glycogen in digestive gland and osmotic pressure (OP) in white shrimp Litopenaeus vannnmei (Boone) and L. setiferus (Linne) juveniles was studied. Diets containing a high-quality protein at a protein/energy (P/E) ratio of 16, 26, 31 and 36 mg kJ(-1) were fed at 20% of shrimp body weight of two sizes: < 1 g and > 1 g. Both species showed a optimum P/E ratio of 36 mg kJ(-1) (33-44% protein and 6-23% carbohydrate) in juveniles <1g. For shrimp >1g, L. setiferus showed a higher growth rate in the diet with 16 mg kJ(-1) (27% protein: 32% carbohydrate) and L. vannamei between 26 and 36 mg kJ(-1) (33-44% protein and 6-23% carbohydrate). In both experiments, the growth rate of L. vannamei was 2-3 times that observed in L. setiferus. Routine oxygen consumption and apparent heat increment (AHI) of L. setiferus juveniles was two times higher than that observed in L. vannamei juveniles, which could indicate that L, setiferus has a higher metabolic rate. The O/N ratio varied according to protein level, with higher values (O/N = 180) with a 16-mg kJ(-1) diet and lower values (O/N = 73) with a 36-mg kJ(-1) diet in L. setiferus juveniles. A similar variation in O/N ratio was obtained in L. vannnmei fed with all diets with an interval between 22 and 50. An inverse relation between ammonia excretion and HG, and digestive gland glycogen (DGG) in relation to an increase in the P/E ratio indicate that both shrimp species are well adapted to use carbohydrates and/or proteins from their diet. The higher values of hyper-osmotic capacity (hyper-OC) were observed in L. setiferus <1g fed with 36 mg kJ(-1) and the lowest in L. vannamei <1 g fed with 31 mg kJ(-1). Intermediate values of hyper-OC were observed in both species fed all diets indicating that osmotic factors of juveniles <1g of both species are more affected by the P/E ratio than juveniles >1g. All results showed that juveniles > 1 g of both species are less dependent of P/E ratio than juveniles <1 g. Litopenaeus vannnmei is a most tolerant shrimp species with a high capacity to use a wide range of dietary P/E ratios for growth, which may be due to its lower energy requirements. Litopenaeus setiferus showed a lower capacity to accept different P/E ratios but the optimum P/E ratio obtained with this species shows that L. setiferus accept diets with a high carbohydrate level as well. These results demonstrate that there are nutritional and physiological differences that explain the differences that have been observed when both species were cultured in commercial ponds MH - Fr Polynesia MH - France MH - Mexico|Campeche PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000169897200003 L2 - Litopenaeus setiferus;Litopenaeus vannamei;growth;carbohydrate metabolism;nutrition;oxygen consumption;PENAEUS-MONODON FABRICIUS; OSMOREGULATORY CAPACITY; HEAT INCREMENT; MOLT STAGE; SURVIVAL; POSTLARVAE; SHRIMP; METABOLISM; AMMONIA; STYLIROSTRIS SO - Aquaculture Research 2001 ;32(7):531-547 4152 UI - 13802 AU - Rosas C AU - Cuzon G AU - Gaxiola G AU - Le Priol Y AU - Pascual C AU - Rossignyol J AU - Contreras F AU - Sanchez A AU - van Wormhoudt A AD - UNAM, Fac Ciencias, Lab Ecofisiol, Grp Biol Marina Expt, Campeche, MexicoIFREMER, COP, Taravao, Tahiti, Fr PolynesiaColl France, F-29900 Concarneau, FranceMuseum Natl Hist Nat, Stn Biol Marine, F-29900 Concarneau, FranceRosas, C, UNAM, Fac Ciencias, Lab Ecofisiol, Grp Biol Marina Expt, Apdo Post 69,Cd del Carmen, Campeche, Mexico TI - Metabolism and growth of juveniles of Litopenaeus vannamei: effect of salinity and dietary carbohydrate levels AB - The present study was designed to understand how carbohydrate (CBH) and protein metabolism are related in the penaeid shrimp Litopenaeus vannamei. With this information, we obtained a comprehensive schedule of the protein-carbohydrate metabolism including enzymatic, energetic, and functional aspects. We used salinity to determine its role as a modulator of the protein-carbohydrate metabolism in shrimp. Two experiments were designed. The first experiment evaluated the effect of CBH-salinity combinations in growth and survival, and hemolymph glucose, protein, and ammonia levels, digestive gland glycogen, osmotic pressure, and glutamate dehydrogenase (GDH) of L. vannamei juveniles acclimated during 18 days at a salinity of 15 parts per thousand and 40 parts per thousand. The second experiment was done to evaluate the effect of dietary CBH level on pre- and postprandial oxygen consumption, ammonia excretion, and the oxygen-nitrogen ratio (O/N) of juvenile L. vannamei in shrimps acclimated at 40 parts per thousand salinity. We also evaluated the ability of shrimp to carbohydrate: adaptation. We made phosphoenolpyruvate carboxykinase (PECPK) and hexokinase activity measurements after a change in dietary carbohydrate levels at different times during 10 days. The growth rate depended on the combination salinity-dietary CBH-protein level. The maximum growth rate was obtained in shrimps maintained at 15 parts per thousand salinity and with a diet containing low CBH and high protein. The protein in hemolymph is related to the dietary protein levels; high dietary protein levels produced a high protein concentration in hemolymph. This suggests hemolymph is able to stoic proteins after a salinity acclimation. Depending on the salinity, the hemolymph proteins could be used as a source of osmotic effectors or as metabolic energy. The O/N values obtained show that shrimp used proteins as a source of energy mainly when shrimps were fed with low CBH. The role played by postprandial nitrogen excretion (PPNE) in apparent heat increase (AHI) (PPNE/AHI ratio) is lower in shrimps feti diets containing high CBH in comparison with shrimps fed diets containing low CBH levels. These results confirm that the metabolism of L. vannamei juveniles is controlled by dietary protein levels, affecting the processes involved in the mechanical and biochemical transformations of ingested food. A growth depression effect was observed in shrimps fed with low-CBH protein diets and maintained in 40 parts per thousand salinity. Ln these shrimps, the: hemolymph ammonia concentration (HAC) was significantly higher than that observed in shrimps fed with low CBH and maintained in 15 parts per thousand salinity, That high HAC level coincided with lower growth rate, which suggests that this level might be toxic for juveniles of L. vannamei. Results obtained for GDH activity showed this enzyme regulated both HAC and hemolymph protein levels. with high values in shrimps fed with low CBH levels and maintained in 40 parts per thousand salinity, and lower in shrimps fed with high CBH and maintained in 15 parts per thousand salinity. These differences mean that shrimp with a high-gill GDH activity might waste more energy in oxidation of the excess proteins and amino acids, reducing the energy for growth. It was evident that L. vannamei can convert protein to glycogen by a gluconeogenic pathway, which permitted shrimp to maintain a minimum circulating glucose of 0.34 mg/ml in hemolymph. A high PECPK activity was observed in shrimps fed a diet containing low CBH level indicating that the gluconeogenic pathway is activated, as in vertebrates by low dietary CBH levels, After a change in diet, we observed a change in PEPCK; however, it was lower and seems to depend on the way of adaptation, because it occurred after 6 days when adapting to a high-CBH diet and with little change for the low-CBH diet. (C) 2001 Published by Elsevier Science B.V MH - Fr Polynesia MH - France MH - Mexico|Campeche PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 30 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000168386600001 L2 - carbohydrate metabolism;penaeid shrimp;oxygen consumption;ammonia excretion;salinity;enzymatic activity;Litopenaeus vannamei juveniles;AMMONIA-N EXCRETION; PENAEUS-MONODON FABRICIUS; OXYGEN-CONSUMPTION; AMBIENT AMMONIA; PROTEIN-LEVELS; PHOSPHOENOLPYRUVATE CARBOXYKINASE; NOTIALIS POSTLARVAE; HEAT INCREMENT; GRASS SHRIMP; WHITE SHRIMP SO - Journal of Experimental Marine Biology and Ecology 2001 ;259(1):1-22 4153 UI - 12886 AU - Rosas JM AU - Vila NJ AU - Lugo M AU - Lopez L AD - Univ Jaen, Dept Psicol, Jaen 23071, SpainUNAM, Div Invest & Posgrado, Thalnepantla, MexicoRosas, JM, Univ Jaen, Dept Psicol, Jaen 23071, Spain TI - Combined effect of context change and retention interval on interference in causality judgments AB - Four experiments studied the effects of context change and retention interval on retroactive interference in human causal learning. Experiment 1 found evidence of retroactive interference. Experiment 2 found that either a 48-hr retention interval or a change in the context after the interference treatment decreased retroactive interference. An interaction between context change and retention interval effects was also found, eclipsing the context change effect after the 48-hr retention interval. Experiments 3 and 4 found additivity between context change and retention interval effects when participants were reminded of the difference between physical contexts before the test, independently of whether the context change involved a return to the original acquisition context. These results add to the evidence suggesting that spontaneous forgetting is caused by a change in either the physical or the temporal contexts where information is acquired MH - Mexico|Estado De Mexico MH - Spain PB - WASHINGTON: AMER PSYCHOLOGICAL ASSOC RP - NOT IN FILE U3 - TC 20 U4 - Psychology, Biological;Behavioral Sciences;Psychology;Psychology, Experimental;Zoology U5 - J;Article AV - English IS - 0097-7403 UR - ISI:000170959500005 L2 - MODIFIED RECOGNITION TESTS; LATENT INHIBITION; SPONTANEOUS-RECOVERY; PAVLOVIAN DISCRIMINATION; RETROACTIVE INTERFERENCE; ORIENTING RESPONSE; MEMORY RETRIEVAL; CONDITIONED FEAR; TASTE-AVERSION; EXTINCTION SO - Journal of Experimental Psychology-Animal Behavior Processes 2001 ;27(2):153-164 4154 UI - 12533 AU - Rosas N AU - Sharma P AU - Alvarez C AU - Cabrera A AU - Ramirez R AU - Delgado A AU - Arzoumanian H AD - UNAM, Inst Quim, CU, Coyoacan 04510, MexicoFac Sci & Tech St Jerome, ENSSPICAM, CNRS, UMR 6516, Marseille, FranceRosas, N, UNAM, Inst Quim, CU, Circuito Exterior, Coyoacan 04510, Mexico TI - Novel and facile catalytic synthesis of 2,4-dioxopyrido[2,3-d]pyrimidine derivatives in water AB - Reactions of 6-amino-1,3-dimethyluracil with substituted alpha -ketoalkynes using homogeneous nickel catalyst in aqueous alkaline medium, afford substituted 2,4-dioxopyrido[2,3-d]pyrimidine derivatives in quantitative yields under very mild conditions. A mechanism has been proposed for the reaction involving the nucleophilic attack of Ni(0) anion, formed in situ onto the triple bond of the substrate. All the synthesized pyrimidines were well characterized MH - France MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1472-7781 UR - ISI:000171794000002 L2 - PHASE-TRANSFER CONDITIONS; ALPHA-KETOALKYNES; NICKEL; PROPARGYL SO - Journal of the Chemical Society-Perkin Transactions 1 2001 ;(19):2341-2343 4155 UI - 13444 AU - Rosenthal GG AU - Martinez TYF AU - De Leon FJG AU - Ryan MJ AD - Univ Texas, Coll Nat Sci, Sect Integrat Biol C0930, Austin, TX 78712, USAInst Tecnol Ciudad Victoria, Lab Biol Integrat, Tamaulipas 87010, MexicoRosenthal, GG, Univ Calif San Diego, Dept Biol 0116, La Jolla, CA 92093 USA TI - Shared preferences by predators and females for male ornaments in swordtails AB - Sexually dimorphic traits in many mate recognition systems have evolved in response to preexisting female biases. These biases are often quite general in form and are likely to be shared by predators, thereby imposing a cost on male trait expression. The Mexican tetra Astyanax mexicanus (Pisces: Characidae), a visual predator of swordtail fishes, exhibits the same visual preferences for male body size morphs as do females. Furthermore, tetras in populations where swordtails are absent prefer males with sword ornaments over males with swords removed. The predator preference is thus likely to have arisen prior to contact with fishes bearing the ornament, as has also been suggested for mating preferences for swords MH - Mexico|Tamaulipas MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 26 U4 - Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0003-0147 UR - ISI:000169554600004 L2 - sexual selection;visual signals;predation;Poeciliidae;Xiphophorus;SEXUAL SELECTION; XIPHOPHORUS-NIGRENSIS; COLOR PATTERNS; NATURAL-SELECTION; MATING PREFERENCES; PREEXISTING BIAS; APPARENT SIZE; EVOLUTION; FISH; CONVERGENT SO - American Naturalist 2001 ;158(2):146-154 4156 UI - 12563 AU - Rosete-Aguilar M AU - Rayces JL AD - Univ Nacl Autonoma Mexico, Ctr Instrumentos, Lab Opt Aplicada, Mexico City 04510, DF, MexicoJL Rayces Consulting Inc, Tucson, AZ 85718, USARosete-Aguilar, M, Univ Nacl Autonoma Mexico, Ctr Instrumentos, Lab Opt Aplicada, Circuito Exterior,Cd Univ, Mexico City 04510, DF, Mexico TI - Selection of glasses for achromatic doublets with reduced secondary spectrum. II. Application of the method for selecting pairs of glasses with reduced secondary spectrum AB - The method for selecting pairs of glasses for thin aplanatic achromatic doublets and cemented achromatic doublets with a reduced secondary spectrum, presented in Part I, is applied to the design of two optical systems. The first is a Lister-type 10X microscope objective with a numerical aperture of 0.25 working in the visible band. The second is a camera f/7.5 working in the near-IR spectral band, 0.8521 mum < lambda < 2.3254 mum, of a spectrograph for the San Pedro Martir Observatory in Ensenada, Mexico. Improvement in the performance of both optical systems is shown. (C) 2001 Optical Society of America MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000171853400016 SO - Applied Optics 2001 ;40(31):5677-5692 4157 UI - 12225 AU - Ross EJH AU - Shearman L AU - Mathiesen M AU - Zhou YJ AU - rredondo-Peter R AU - Sarath G AU - Klucas RV AD - Univ Nebraska, George W Beadle Ctr, Dept Biochem, Lincoln, NE 68588, USAUniv Nebraska, George W Beadle Ctr, Ctr Biotechnol, Lincoln, NE 68588, USAUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca, Morelos, MexicoSarath, G, Univ Nebraska, George W Beadle Ctr, Dept Biochem, Lincoln, NE 68588 USA TI - Nonsymbiotic hemoglobins in rice are synthesized during germination and in differentiating cell types AB - Nonsymbiotic hemoglobins (ns-Hbs) previously have been found in monocots and dicots however, very little is known about the tissue and cell type localization as well as the physiological function(s) of these oxygen-binding proteins. We report the immunodetection and immunolocalization of ns-Hbs in rice (Oryza sativa L.) by Western blotting and in situ confocal laser scanning techniques. Ns-Hbs were detected in soluble extracts of different tissues from the developing rice seedling by immunoblotting. Levels of ns-Hbs increased in the germinating seed for the first six days following imbibition and remained relatively constant thereafter. In contrast, ns-Hb levels decreased during leaf maturation. Roots and mesocotyls contained detectable, but low levels of ns-Hbs. Split-seed experiments revealed that ns-Hbs are synthesized de novo during seed germination and are expressed in the absence of any signal originating from the embryo. Immunolocalization of ns-Hbs by confocal microscopy indicated the presence of ns-Hbs primarily in differentiated and differentiating cell types of the developing seedling, such as the aleurone, scutellum, root cap cells, sclerenchyma, and tracheary elements. To our knowledge, this is the first report of the specific cellular localization of these proteins during seedling development MH - Mexico|Morelos MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences;Cell Biology U5 - J;Article AV - English IS - 0033-183X UR - ISI:000172526500002 L2 - nonsymbiotic hemoglobin;plant development;immunodetection;confocal microscopy;seed germination;Oryza sativa L;NITRIC-OXIDE DIOXYGENASE; ESCHERICHIA-COLI; EXPRESSION; PLANTS; GENES; KINETICS; BARLEY; FLAVOHEMOGLOBIN; LEGHEMOGLOBIN; RESPIRATION SO - Protoplasma 2001 ;218(3-4):125-133 4158 UI - 14034 AU - Rosu HC AU - Espinoza PB AD - Univ Guanajuato, Inst Fis, Guanajuato, MexicoInt Ctr Relativist Astrophys, Rome, ItalyUniv Guadalajara, Ctr Univ los Altos, Lagos De Moreno, Jalisco, MexicoRosu, HC, Univ Guanajuato, Inst Fis, Apdo Postal E-143 Leon, Guanajuato, Mexico TI - Ermakov-Lewis angles for one-parameter supersymmetric families of Newtonian free damping modes AB - We apply the Ermakov-Lewis procedure to the one-parameter damped modes (y) over tilde recently introduced by Rosu and Reyes, which are related to the common Newtonian free damping modes y by the general Riccati solution [H. C. Rosu and M. Reyes, Phys. Rev. E 57, 4850 (1998)]. In particular, we calculate and plot the angle quantities of this approach that can help to distinguish these modes from the common y modes MH - Italy MH - Mexico|Guanajuato MH - Mexico|Jalisco PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000167624000116 L2 - OSCILLATOR SO - Physical Review e 2001 ;6303(3): 4159 UI - 14124 AU - Rothenberg SJ AU - Kondrashov V AU - Manalo M AU - Manton WI AU - Khan F AU - Todd AC AU - Johnson C AD - Charles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Res Ctr Populat Hlth, Cuernavaca, Morelos, MexicoUniv Texas, Dept Geosci, Richardson, TX, USACUNY Mt Sinai Sch Med, Dept Community & Prevent Med, New York, NY 10029, USARothenberg, SJ, Charles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059 USA TI - Seasonal variation in bone lead contribution to blood lead during pregnancy AB - Population blood lead level (PbB) often shows seasonal variation, frequently being higher in summer and lower in winter. As vitamin D metabolites also show seasonal variability, and the metabolites are associated with bone metabolism, some authors have posited a role for bone lead release in seasonal PbB changes. We made third trimester and postdelivery PbB measurements on 414 immigrant women (98% Latina) in Los Angeles. We measured in vivo tibia and calcaneus (heel) lead concentration postdelivery via K-shell X-ray fluorescence. We saw evidence of seasonal variation in prenatal PbB, but not postnatal PbB. PbB was highest in spring and lowest in autumn. Tibia lead concentration was associated with prenatal PbB, as reported before. The contribution of tibia lead to prenatal PbB varied seasonally, with the greatest contribution occurring in the winter quarter and the least in the summer quarter. The temporal pattern of bone lead contribution to PbB follows the seasonal alteration of insolation. There was no seasonal component in prenatal PbB associated with calcaneus lead, nor were there seasonal variations in either calcaneus or tibia lead contributions to postnatal PbB. Bone turnover in the third trimester of pregnancy may be higher in winter months than in summer months, resulting in greater fetal lead exposure in spring than at other times of the year. (C) 2001 Academic Press MH - USA MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000167526600002 L2 - lead;Pb;blood;bone;pregnancy;season;CENTRAL LOS-ANGELES; PORT PIRIE; CHILDREN; COHORT; LEVEL SO - Environmental Research 2001 ;85(3):191-194 4160 UI - 13112 AU - Roux MV AU - Jimenez P AU - Davalos JZ AU - Notario R AU - Juaristi E AD - CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRoux, MV, CSIC, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain TI - Calorimetric and computational study of 1,3,5-trithiane AB - To understand the differences in conformational behavior and reactivity of oxygen- and sulfur-containing 1,3,5-heterocyclohexanes, the enthalpies of formation and sublimation of 1,3,5-trithiane, 1, have been measured. The numerical value of the enthalpy of formation for this compound in the solid state is -8.6 +/- 2.6 kJ mol(-1), while the corresponding value in the gaseous state is 84.6 +/- 2.6 kJ mol(-1). The value for the enthalpy of sublimation is 93.2 +/- 0.2 kJ mol(-1). Standard ab initio molecular orbital calculations at the G2(MP2), G2, and G3 levels were performed, and the calculated enthalpies of formation are compared with the experimental data. These experimental and theoretical studies support the relevance of through-space lone pair-lone pair electronic repulsion in the sulfur heterocycle MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000170301200009 L2 - HYDROCARBONS INCLUDING AROMATICS; DENSITY-FUNCTIONAL THEORIES; STANDARD MOLAR ENTHALPY; AB-INITIO LEVELS; VAPOR-PRESSURES; THERMOCHEMICAL PROPERTIES; ORGANIC THERMOCHEMISTRY; STABILIZATION ENERGIES; GAUSSIAN-2 THEORY; GASEOUS-PHASE SO - Journal of Organic Chemistry 2001 ;66(16):5343-5351 4161 UI - 13487 AU - Rowan MG AU - Ratliff RA AU - Trudgill BD AU - Duarte JB AD - Rowan Consulting Inc, Boulder, CO 80302, USAGeolog Syst LLC, Boulder, CO 80301, USAUniv London Imperial Coll Sci Technol & Med, TH Huxley Sch, London SW7 2BP, EnglandPEMEX, Explorac & Prod, Mexico City 14380, DF, MexicoRowan, MG, Rowan Consulting Inc, 1633 D 4th St, Boulder, CO 80302, USA TI - Emplacement and evolution of the Mahogany salt body, central Louisiana outer shelf, northern Gulf of Mexico AB - We used three- and two-dimensional seismic data, well and biostratigraphic constraints, and structural restorations to evaluate the evolution of the Mahogany salt body and surrounding strata on the central Louisiana outer shelf of the northern Gulf of Mexico. The history of emplacement and subsequent modification of the Mahogany salt body is divided into six stages: (1) growth of a basinward-leaning salt ridge sourced from a deep allochthonous salt sheet prior to 7.5 Ma; (2) loading-induced evacuation of a large volume of salt from the sheet and ridge through a narrow feeder, resulting in rapid salt flow and consequent radial growth of a bulb-shaped salt stock between 7.5 and 4.3 Ma; (3) gravitational collapse of the inflated salt stock after depletion of the deep source layer, leading to basinward extrusion of a subhorizontal salt tongue and its rafted overburden between 4.3 and 3.65 Ma; (4) burial of the composite salt body during a period of slow sedimentation between 3.65 and 1.95 Ma; (5) basinward translation of the overburden resulting from gravity gliding/spreading on the upper slope between 1.95 and 0.5 Ma, causing extension, reactive diapirism, and matching contraction; and (6) cessation of lateral translation once the shelf margin prograded past the salt body, and subsequent loading of the salt driving active diapirism in the footwalls of normal faults. The Mahogany salt body provides an excellent case study that illustrates both the value and limitations of published simple models for allochthonous salt, and the reconstructed evolution yields insights into the complex interactions between salt deformation and sedimentation. The results also suggest that the Mahogany salt body did not influence the trap style of the subsalt Mahogany field or hydrocarbon migration into the pay sands but that it did affect sediment transport pathways and, to a lesser degree, reservoir facies distribution MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - TULSA: AMER ASSOC PETROLEUM GEOLOGIST RP - NOT IN FILE U3 - TC 4 U4 - Energy & Fuels;Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-1423 UR - ISI:000169320200001 L2 - OF-MEXICO; ALLOCHTHONOUS SALT; OFFSHORE LOUISIANA; GREEN CANYON; EWING BANK; COAST SO - Aapg Bulletin 2001 ;85(6):947-969 4162 UI - 14572 AU - Royse DJ AU - Sanchez-Vazquez JE AD - Penn State Univ, Dept Plant Pathol, Mushroom Res Ctr, Buckhout Lab 316, University Pk, PA 16802, USAColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoRoyse, DJ, Penn State Univ, Dept Plant Pathol, Mushroom Res Ctr, Buckhout Lab 316, University Pk, PA 16802 USA TI - Influence of substrate wood-chip particle size on shiitake (Lentinula edodes) yield AB - Wood chips from four commercial hardwood sawmills were screened with 10 US standard sieves (4-0.21 mm) to assess particle size distributions. 96-98% of wood chips were <4 mm while 95-99% of particles were >0.21 mm. The majority (mean = 64.5%) of wood chips passed through US standard sieve size 14 (<1.4 mm). Shiitake (Lentinula edodes) was grown in three crops to determine the effect of four particle size classes (1 = 2.8-4 mm; 2 = 1.7-2.8 mm; 3 = 0.85-1.7 mm; 4 = < 0.85 mm) on mushroom yield. Yields from substrates prepared with wood chips from class 4 (<0.85 mm) were lower by 27.7%, 12.4% and 2% (mean = 14.9%) for Crops I, II, and III, respectively, when compared to controls. Profiling of wood chips may help growers optimize their production media and reduce production costs. (C) 2000 Elsevier Science Ltd. All rights reserved MH - Mexico|Chiapas MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000166234100008 L2 - Lentinula edodes;shiitake;wood chips;mushrooms;CULTIVATION SO - Bioresource Technology 2001 ;76(3):229-233 4163 UI - 13784 AU - Rozeboom KJ AU - Rocha-Chavez G AU - Troedsson MHT AD - N Carolina State Univ, Dept Anim Sci, Raleigh, NC 27695, USAUniv Guadalajara, Dept Anim Prod, Cd Guzman 49000, Jalisco, MexicoUniv Minnesota, St Paul, MN 55108, USARozeboom, KJ, N Carolina State Univ, Dept Anim Sci, Box 7621, Raleigh, NC 27695 USA TI - Inhibition of neutrophil chemotaxis by pig seminal plasma in vitro: a potential method for modulating post-breeding inflammation in sows AB - The aim of this study was to determine the regulatory role of pig seminal plasma in post-breeding uterine inflammation. Polymorphonuclear neutrophil (PMN) chemotaxis of lipopolysaccharide (LPS)-activated blood plasma or heat-inactivated blood plasma plus LPS containing increasing concentrations of seminal plasma was assessed in chemotactic chambers. Seminal plasma was diluted serially with McCoy's medium to concentrations of 50.0, 25.0, 12.5, 6.2 or 3.1% (v/v) and added to normal or heat-inactivated pig blood plasma that was activated with LPS before or after incubation in a 37 degreesC waterbath for 30 min. Chemotaxis was determined using blood-derived PMNs and was expressed as a percentage of the positive control of LPS-activated blood plasma. A linear dose-dependent suppression of chemotaxis by seminal plasma was observed for blood plasma activated before or after addition of seminal plasma. Compared with the positive control, concentrations of seminal plasma < 6.2% failed to suppress PMN chemotaxis (P < 0.05). A dose-dependent suppressive effect of seminal plasma on heat stable chemotactic components of pig blood plasma was also observed (P < 0.05). A marked suppression was observed at concentrations of seminal plasma 12.5% of the sample volume (P < 0.05). These results indicate that seminal plasma suppresses chemotactic blood plasma components regardless of formation sequence (pre- or post-activation) or source (normal or heat-inactivated blood plasma). These results indicate that seminal plasma may be necessary in diluted boar semen used for artificial insemination to regulate post-breeding inflammation in sows MH - Mexico|Jalisco MH - USA PB - CAMBRIDGE: JOURNALS OF REPRODUCTION FERTILITY LTD RP - NOT IN FILE U3 - TC 7 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1470-1626 UR - ISI:000168428100009 L2 - ARTIFICIAL-INSEMINATION; SWINE SO - Reproduction 2001 ;121(4):567-572 4164 UI - 13225 AU - rrieta-Ruiz L AU - Quiroz-Mercado H AU - Cardenas-Hernandez R AU - Lopez-Carasa G AU - Granados J AU - Liggett P AU - Frazier S AU - Guerrero-Naranjo J AD - APEC, Retina, Mexico City, DF, MexicoCornell Univ, Med Ctr, New York Hosp, New York, NY 10021, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - Case-report of bilateral idiopathic macular hole in two children of the same family MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000168392103689 SO - Investigative Ophthalmology & Visual Science 2001 ;42(4):S692-S692 4165 UI - 13523 AU - Rubio-Gonzalez C AU - Mason JJ AD - Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556, USACidesi, Queretaro 76130, MexicoRubio-Gonzalez, C, Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA TI - Green's functions for the stress intensity factor evolution in finite cracks in orthotropic materials AB - The elastodynamic response of atl infinite orthotropic material with finite crack under concentrated loads is examined. Solution for the stress intensity factor history around the crack; tips is found. Laplace and Fourier transforms are employed to solve the equations of motion leading to a Fredholm integral equation on the Laplace transform domain. The dynamic stress intensity factor history can be computed by numerical Laplace transform inversion of the solution of the Fredholm equation. Numerical values of the dynamic stress intensity factor history for some example materials are obtained. This solution can be used as a Green's function to solve dynamic problems involving fini te cracks MH - USA MH - Mexico|Queretaro PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Mechanics U5 - J;Article AV - English IS - 0376-9429 UR - ISI:000169117800002 L2 - finite cracks;arthotropic materials;stress intensity factor;IMPACT RESPONSE SO - International Journal of Fracture 2001 ;108(4):317-336 4166 UI - 12244 AU - Rueda M AD - IPN, CINVESTAV, Yucatan 97310, MexicoINVEMAR, Inst Invest Marinas & Costeras, Santa Marta, ColombiaRueda, M, IPN, CINVESTAV, AP 73 Cordemex, Yucatan 97310, Mexico TI - Spatial distribution of fish species in a tropical estuarine lagoon: a geostatistical appraisal AB - The density and spatial distribution of 3 commercial fish species and coincident abiotic factors were analyzed seasonally in the Cienaga Grande de Santa Marta between 1993 and 1994. Geostatistical techniques were used to model and estimate spatial structure (variographic analysis) and to predict local fish density and salinity (ordinary kriging). Salinity showed a persistent spatial and temporal gradient determined by climatic seasons. Eugerres plumieri, Cathorops spixii and Mugil incilis showed different spatial correlations that determined different patch distribution patterns among seasons. The highest densities of E. plumieri and M. incilis and a secondary peak of C. spixii occurred during the rainy season, near the lagoon-sea connection, Statistically significant multiple regression models could account for 13, 2 and 30% of the variance of E. plumieri, C. spixii and M. incilis densities respectively, using a combination of salinity, depth and substrate type; temperature was consistently rejected as predictor. E. plumieri, C. spixii and M. incilis preferred fine sands, shells, and mud respectively, and euryhaline behavior was observed for all species MH - Colombia MH - Mexico|Yucatan PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 16 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000172516300019 L2 - fish density;spatial distribution;geostatistics;abiotic factors;tropical estuarine lagoon;Colombia;DE-SANTA-MARTA; POPULATION-DYNAMICS; COLOMBIA; ASSEMBLAGES; ABUNDANCE; SALINITY; MANGROVE; BIOMASS; LARVAE; COAST SO - Marine Ecology-Progress Series 2001 ;222():217-226 4167 UI - 12399 AU - Rueda M AU - Defeo O AD - IPN, CINVESTAV, Lab Biol Pesquera, Merida, Yucatan, MexicoInst Invest Marinas & Costeras, Santa Marta, ColombiaRueda, M, IPN, CINVESTAV, Lab Biol Pesquera, AP 73 Cordemex, Merida, Yucatan, Mexico TI - Survey abundance indices in a tropical estuarine lagoon and their management implications: a spatially-explicit approach AB - We estimated the spatial population structure and biomass of Eugerres plumieri, Mugil incilis, and Cathorops spixil in a tropical estuarine lagoon in Colombia, based on survey data carried out seasonally in 1993-1994 and 1997. Geostatistical techniques and the swept area method were used to map and estimate fish biomass, whereas uncertainty in spawning biomass was estimated by Monte Carlo analysis to assess the status of the fishery. Biomass tended to be spatially autocorrelated and populations were distributed in high-biomass patches of 2-15 km in diameter. The spatial dependence was variable among species and seasons. High-biomass patches did not overlap in space between species, which could be viewed as a way of reducing or avoiding potential interactions. However, the occurrence of highest biomass for E. plumieri and M. incilis during the same season might be directed to overcome the effect of a widely fluctuating environment such as occurs in estuarine lagoons. Selectivity experiments were performed to account for the effect of fishing gear vulnerability in biomass estimates. Application of the encounter probability model showed increasing probabilities of capture with individual size and differential avoidance behaviour among species. Risk analysis, used for testing a biological reference point defined in terms of harvesting and spawning biomass, suggested the need to take immediate management actions for E. plumieri. (C) 2001 International Council for the Exploration of the Sea MH - Colombia MH - Mexico|Yucatan PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 11 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1054-3139 UR - ISI:000172194400010 L2 - fish biomass;geostatistical mapping;selectivity;limit reference points;tropical estuarine lagoon;Colombia;DE-SANTA-MARTA; GEOSTATISTICS; COLOMBIA; BIOMASS; FISHERIES SO - Ices Journal of Marine Science 2001 ;58(6):1219-1231 4168 UI - 14275 AU - Ruiz-Bustos E AU - Ochoa JL AU - Wadstrom T AU - Ascencio F AD - Biol Res Ctr, Dept Marine Pathol, La Paz 23000, Baja Calif Sur, MexicoUniv Lund, Inst Med Microbiol, S-22362 Lund, SwedenAscencio, F, Biol Res Ctr, Dept Marine Pathol, La Paz 23000, Baja Calif Sur, Mexico TI - Isolation and characterisation of putative adhesins from Helicobacter pylori with affinity for heparan sulphate proteoglycan AB - A pool of heparan sulphate-binding proteins (HSBPs) from Helicobacter pylori culture supernates was obtained by sequential ammonium sulphate precipitation and affinity chromatography on heparin-Sepharose, The chromatographic procedure yielded one major fraction that contained proteins with heparan sulphate affinity as revealed by inhibition studies of heparan sulphate binding to H. pylori cells. Preparative iso-electric focusing, SDS-PACE and blotting experiments, with peroxidase(POD)-labelled heparan sulphate as a probe, indicated the presence of two major extracellular proteins with POD-heparan sulphate affinity. One protein had a molecular mass of 66.2 kDa and a pI of 5.4, whilst the second protein had a molecular mass of 71.5 kDa and a pI of 5.0. The N-terminal amino acid sequence of the 71.5-kDa HSBP did not show homology to any other heparin-binding protein, nor to known proteins of H, pylori, whereas the 66.2-kDa HSBP showed a high homology to an Escherichia coli chaperon protein and equine haemoglobin. A third HSBP was isolated from an outer-membrane protein (OMP) fraction of H. pylori cells with a molecular mass of 47.2 kDa, The amino acid sequence of an internal peptide of the OMP-HSBP did not show homology to the extracellular HSBP of H, pylori, or to another microbial HSBP MH - Mexico|Baja California Sur MH - Sweden PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0022-2615 UR - ISI:000167047100003 L2 - CAMPYLOBACTER-PYLORI; CELLULAR PROTEOGLYCANS; GNOTOBIOTIC PIGLETS; GASTRIC EPITHELIUM; MEMBRANE PROTEINS; SULFATE-BINDING; LIQUID-MEDIA; GROWTH; UREASE; IDENTIFICATION SO - Journal of Medical Microbiology 2001 ;50(3):215-222 4169 UI - 12301 AU - Ruiz-Fernandez AC AU - Hillaire-Marcel C AU - Ghaleb B AU - Paez-Osuna F AU - Soto-Jimenez M AD - UNAM, ICMyL, Mazatlan 82040, MexicoUQAM, Geotop, Montreal, PQ H2Y 3X7, CanadaUNAM, DGEP, Mazatlan 82040, MexicoRuiz-Fernandez, AC, UNAM, ICMyL, Joel Montes Camarena S-N, Mazatlan 82040, Mexico TI - Isotopic constraints (Pb-210, Th-228) on the sedimentary dynamics of contaminated sediments from a subtropical coastal lagoon (NW Mexico) AB - Six sediment push-cores were collected at a coastal lagoon system affected by urban and agriculture wastes. The sediments were analyzed for Th-228, Th-230, Th-232, Pb-210, Ra-226, and Cs-137. Cs-137 activities were at background level for all samples. The Pb-210(tot) activities found in the area varied from 0.5 to 4.5 dpm g(-1) with Pb-210(sup) levels ranging between 1.2-1.8 dpm g(-1). Cores CHI and EPC showed flat profiles depleted of Pb-210(xs), indicating the absence of recent sedimentation. Core CAI shows a flat Pb-210(xs), profile that seems to be bioturbated. Cores ERC and BRI show chaotic profiles with layers totally depleted in Pb-210(xs), likely caused by resuspension triggered by storm conditions. High Th-228/Th-232 values observed at core ERC suggest that the resuspension event occurred less than 10 years ago. The contaminated sediment of the lagoon are frequently resuspended, re-oxygenated, and therefore the contaminating trace metals will continue to be easily remobilized in the food chain MH - Canada MH - Mexico|Sinaloa PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000172415500008 L2 - bioturbation;Pb-210;sedimentary process;Th-228/Th-232;WASHINGTON CONTINENTAL-SHELF; AGRICULTURAL DRAINAGE-BASIN; ACCUMULATION RATES; POLLUTION HISTORY; MARINE-SEDIMENTS; CHESAPEAKE BAY; LAKE SEDIMENTS; MIXING RATES; HEAVY-METALS; CS-137 SO - Environmental Geology 2001 ;41(1-2):74-89 4170 UI - 12681 AU - Ruiz-Fernandez AC AU - Paez-Osuna F AU - Hillaire-Marcel C AU - Soto-Jimenez M AU - Ghaleb B AD - UNAM, Inst Marine Sci & Limnol, Mazatlan 82000, Sin, MexicoUQAM, GEOTOP, Ctr Isotop Geochem & Geochronol, Montreal, PQ H2Y 3X7, CanadaUNAM, Postgrad Program Marine Sci & Limnol, Mazatlan 82000, Sin, MexicoRuiz-Fernandez, AC, UNAM, Inst Marine Sci & Limnol, POB 811, Mazatlan 82000, Sin, Mexico TI - Principal component analysis applied to the assessment of metal pollution from urban wastes in the Culiacan river estuary MH - Canada MH - Mexico|Sinaloa PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000171581700017 L2 - MULTIVARIATE-ANALYSIS; SEDIMENTS; CONTAMINATION; CORES; CLAYS; LEAD SO - Bulletin of Environmental Contamination and Toxicology 2001 ;67(5):741-748 4171 UI - 12781 AU - Ruiz-Flores A AU - Johnson RK AD - Univ Nebraska, Dept Anim Sci, Lincoln, NE 68583, USAJohnson, RK, Univ Autonoma Chapingo, Dept Zootecn, Chapingo 56230, Mexico TI - Direct and correlated responses to two-stage selection for ovulation rate and number of fully formed pigs at birth in swine AB - Our objectives were to estimate responses and genetic parameters for ovulation rate, number of fully formed pigs at birth, and other production traits following two-stage selection for increased ovulation rate and number of fully formed pigs. Eight generations of selection were practiced in each of two lines. One selection line was derived from a line that previously selected eight generations for an index to increase ovulation rate and embryonic survival (the IOL pigs). The other selection line was derived from the unselected control line of the index selection experiment (the COL pigs). The control line (C) was continued with random selection. Due to previous selection, Line IOL had greater ovulation rate (4.24 +/- 0.38 and 4.14 +/- 0.29 ova) and litter size (1.97 +/- 0.39 and 1.06 +/- 0.38 pigs) at Generation 0 of two-stage selection than did Lines COL and C. In Stage 1, all gilts from 50% of the largest litters were retained. Approximately 50% of them were selected for ovulation rate in Stage 2. Gilts selected for ovulation rate were mated to boars selected from the upper one-third of the litters for litter size. At Generations 7 and 8, differences in mean EBV for ovulation rate and litter size between Lines IOL and C were 6.20 +/- 0.29 ova and 4.66 +/- 0.38 pigs; differences between Lines COL and C were 2.26 0.29 ova and 2.79 0.39 pigs; and differences between Lines IOL and COL were 3.94 +/- 0.26 ova and 1.86 +/- 0.39 pigs. Regressions of line mean EBV on generation number were 0.27 +/- 0.07 ova and 0.35 +/- 0.06 pigs in Line IOL; 0.30 +/- 0.06 ova and 0.29 +/- 0.05 pigs in Line COL; and 0.01 +/- 0.07 ova and 0.02 +/- 0.05 pigs in Line C. Correlated responses were decreased age at puberty and increased number of pigs born alive, number of mummified pigs, prenatal loss, and individual and litter birth weight. Two-stage selection for ovulation rate and number of pigs per litter is a promising procedure to improve litter size in swine MH - Mexico|Estado De Mexico MH - USA PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000171208900006 L2 - litter size;ovulation rate;pigs;selection;POTENTIAL EMBRYONIC VIABILITY; EXPLAIN LITTER SIZE; UTERINE CAPACITY; SIMULATION-MODEL; GENETIC-IMPLICATIONS; INDEX SELECTION; MICE; GENERATIONS; POPULATION; COMPONENTS SO - Journal of Animal Science 2001 ;79(9):2286-2297 4172 UI - 13769 AU - Ruiz-Medrano R AU - Xoconostle-Cazares B AU - Lucas WJ AD - IPN, CINVESTAV, Dept Biotecnol & Bioingn, Zacatenco 07360, DF, MexicoUniv Calif Davis, Div Biol Sci, Plant Biol Sect, Davis, CA 95616, USARuiz-Medrano, R, IPN, CINVESTAV, Dept Biotecnol & Bioingn, Ave IPN 2508, Zacatenco 07360, DF, Mexico TI - The phloem as a conduit for inter-organ communication AB - The plant vascular system plays a pivotal role in the delivery of nutrients to distantly located organs. Recent discoveries have provided new insight into a novel role for plasmodesmata and the phloem in terms of the transport and delivery of information macromolecules (i.e, proteins and ribonucleoprotein complexes), Non-cell/organ-autonomous control over gene expression may function both in defense signaling and developmental programming in plants MH - Mexico|Distrito Federal MH - USA PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 60 U4 - Plant Sciences U5 - J;Review AV - English IS - 1369-5266 UR - ISI:000168499500006 L2 - CELL-TO-CELL; GREEN-FLUORESCENT PROTEIN; ENUCLEATE SIEVE ELEMENTS; VIRAL MOVEMENT PROTEIN; SHOOT APICAL MERISTEM; MESSENGER-RNA; ARABIDOPSIS-THALIANA; SUCROSE TRANSPORTERS; NITRATE REDUCTASE; VIRUS-RESISTANCE SO - Current Opinion in Plant Biology 2001 ;4(3):202-209 4173 UI - 14107 AU - Ruiz-Sanchez MA AU - Biersack EW AU - Dabbous W AD - Univ Autonoma Metropolitana Iztapalapa, Dept Elect Engn, Mexico City, DF, MexicoInst Eurecom, Sophia Antipolis, FranceINRIA, Sophia Antipolis, FranceRuiz-Sanchez, MA, Univ Autonoma Metropolitana Iztapalapa, Dept Elect Engn, Mexico City, DF, Mexico TI - Survey and taxonomy of IP address lookup algorithms AB - Due to the rapid growth of traffic in the Internet, backbone links of several gigabits per second ore commonly deployed. To handle gigabit-per-second traffic rates, the backbone routers must be able to forward millions of packets per second on each of their ports. Fast IP address lookup in the routers, which uses the packet's destination address to determine for each packet the next hop, is therefore crucial to achieve the packet forwarding rates required. IP address lookup is difficult because it requires a longest matching prefix search. In the last couple of years, various algorithms for high-performance IP address lookup have been proposed. We present a survey of state-of-the-art IP address lookup algorithms and compare their performance in terms of lookup speed, scalability, and update overhead MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 49 U4 - Computer Science, Hardware & Architecture;Computer Science, Information Systems;Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0890-8044 UR - ISI:000167508500003 SO - Ieee Network 2001 ;15(2):8-23 4174 UI - 12863 AU - Ruiz-Verdugo CA AU - Allen SK AU - Ibarra AM AD - Ctr Invest Biol Noroeste SC, Programa Acuacultura & Biotecnol Marina, La Paz 23000, BCS, MexicoVirginia Inst Marine Sci, Aquaculture Genet & Breeding Technol Ctr, Gloucester Point, VA 23062, USAIbarra, AM, Ctr Invest Biol Noroeste SC, Programa Acuacultura & Biotecnol Marina, AP 128, La Paz 23000, BCS, Mexico TI - Family differences in success of triploid induction and effects of triploidy on fecundity of catarina scallop (Argopecten ventricosus) AB - Mass induction of triploidy in the catarina scallop ( Argopecten ventricosus) results in low success in the percentage of triploids produced. To understand whether this is a treatment effect affecting all eggs equally, families were individually induced to triploidy with cytochalasin-B (CB), comparing their survival from egg to D-larvae and spat, and the percent of triploidy within families. Differences in percent triploidy success were evident between families, obtaining some with no triploids, and some with high triploidy. Among the possible causes for these differences are quality of eggs, different developmental rates, and differences in susceptibility to the treatment (CB or DMSO) itself. Regardless of those differences, overall triploidy production was increased by inducing individually eggs of each scallop rather than in mixed egg batches. In the first experiment, it was improved by 17%, and in the second experiment by 42%, as indicated by the weighted mean of triploids among the families, and when compared with previous results with this same species, where triploidy success was 58%. In a second experiment with three different families, the growth and fecundity of triploid and diploid catarina scallops were evaluated. The growth superiority of triploids was confirmed. The results indicated that triploid catarina scallops had a significantly reduced fecundity when compared with diploid scallops. The reduced fecundity appears to be mostly of a random nature, possibly associated with a reduced capability to produce balanced gametes. Whereas the successful production of tetraploid catarina scallop from fertile triploid scallops is in principle possible, the low number of eggs shed by triploid catarina scallops could diminish that success rate, even more if single triploid females are required to optimize tetraploid induction. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000171063100002 L2 - fecundity;growth;triploid;scallop;family;egg development;CRASSOSTREA-GIGAS; PACIFIC OYSTERS; TOTAL WEIGHT; SHELL WIDTH; GROWTH; OPTIMIZATION; TETRAPLOIDS; SELECTION; DIAMETER; SURVIVAL SO - Aquaculture 2001 ;201(1-2):19-33 4175 UI - 14264 AU - Ruiz PD AU - Davila A AU - Mendiola G AU - Kaufmann GH AD - Univ Nacl Rosario, CONICET, Inst Fis Rosario, RA-2000 Rosario, Santa Fe, ArgentinaCtr Invest Opt, Leon, MexicoUniv Nacl Rosario, Fac Ciencias Exactas Ingn & Agrimensura, Dept Fis, RA-2000 Rosario, Santa Fe, ArgentinaRuiz, PD, Univ Nacl Rosario, CONICET, Inst Fis Rosario, Bv 27 Febrero 210 Bis, RA-2000 Rosario, Santa Fe, Argentina TI - Measurement of the temporal evolution of periodic induced displacement derivatives using stroboscopic electronic speckle-shearing interferometry AB - Single pulsed subtraction electronic speckle-shearing pattern interferometry is used to measure the time evolution of deformations induced by periodic impulse loading on a metal plate. This is accomplished with a stroboscopic system based on a pulsed laser and an interline-transfer CCD camera running at 60 frames/s. In a few seconds, a sequence of hundreds of interferograms is recorded with an effective sampling time interval of some tens of microseconds. We describe the experimental setup used to generate the transient deformation on the metal plate and also the synchronization of laser pulses and image acquisition. Several correlation fringe patterns are presented, showing the time evolution of the deformation. Finally, these data are used to calculate optical phase maps and displacement derivative fields for different times after the application of the dynamic load on the object. (C) 2001 Society of Photo-Optical Instrumentation Engineers MH - Argentina MH - Mexico|Guanajuato PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000167036700022 L2 - speckle-shearing interferometry;speckle metrology;strain measurement;pulsed lasers;TRANSIENT DEFORMATION ANALYSIS; PULSED TV HOLOGRAPHY; PATTERN INTERFEROMETRY; VIBRATION ANALYSIS; ALGORITHM SO - Optical Engineering 2001 ;40(2):318-324 4176 UI - 13257 AU - Rulkov NF AU - Afraimovich VS AU - Lewis CT AU - Chazottes JR AU - Cordonet A AD - Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAUASLP, IICO, San Luis Potosi 78000, MexicoUniv Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUniv Sao Paulo, IME, BR-05508900 Sao Paulo, BrazilUniv Mediterranee, Ctr Phys Theor, F-13288 Marseille, FranceRulkov, NF, Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093 USA TI - Multivalued mappings in generalized chaos synchronization AB - The onset of generalized synchronization of chaos in directionally coupled systems corresponds to the formation of a continuous mapping that enables one to persistently define the state of the response system from the trajectory of the drive system. A recently developed theory of generalized synchronization of chaos deals only with the case where this synchronization mapping is a single-valued function. In this paper, we explore generalized synchronization in a regime where the synchronization mapping can become a multivalued function. Specifically, we study the properties of the multivalued mapping that occurs between the drive and response systems when the systems are synchronized with a frequency ratio other than one-to-one, and address the issues of the existence and continuity of such mappings. The basic theoretical framework underlying the considered synchronization regimes is then developed MH - USA MH - Brazil MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000169907300063 L2 - COUPLED DYNAMICAL-SYSTEMS; PHASE SYNCHRONIZATION; OSCILLATIONS; ORBITS SO - Physical Review e 2001 ;6401(1): 4177 UI - 11897 AU - Russell CT AU - Blanco-Cano X AU - Strangeway RJ AU - Wang YL AU - Raeder J AD - Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoRussell, CT, Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA TI - A mechanism for the production of a disk-shaped neutral source cloud at Io AB - Io adds of the order of 1000 kg s(-1) of ionized material to the jovian magnetosphere. Freshly produced molecular ions, such as SO+ and SO2+, lead to the growth of ion cyclotron waves at frequencies characteristic of their gyro frequencies. These waves are seen over a region about 0.5 R-J radially inward and outward from Io and of similar or greater extent in the down wake direction but not upstream of Io. We examine simplified numerical simulations of the massloading process that preserve the essential physics and demonstrate how this geometry of the massloading region can be created and what we might expect to see on future Galileo Io passes. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000173496300003 L2 - PLASMA TORUS SO - Io, Europa, Titan and Cratering of Icy Surfaces 2001 ;28(10):1475-1479 4178 UI - 12386 AU - Russell CT AU - Wang YL AU - Blanco-Cano X AU - Strangeway RJ AD - Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USANatl Autonomous Univ Mexico, Inst Geophys, Mexico City 04510, DF, MexicoRussell, CT, Univ Calif Los Angeles, Inst Geophys & Planetary Phys, 405 Hilgard Ave, Los Angeles, CA 90095 USA TI - The Io mass-loading disk: Constraints provided by ion cyclotron wave observations AB - Galileo measurements on the first two encounters with lo have revealed that ion cyclotron waves associated with SO2+ and SO+ can extend to at least 20 Io radii (R-Io) on the anti-Jupiter side of lo but to only similar to7 R-Io on the Jupiter facing side. In the flow direction the waves extend downstream at least 10 R-Io, but not upstream of lo. Earlier Voyager observations, I I R-Io below lo, also show no evidence for the generation of ion cyclotron waves. Quite unlike expectations from growth rate calculations in a uniform infinite plasma, the waves are frequently found to be propagating at an oblique angle to the magnetic field. The absence of waves upstream of To and the wide dispersal of the ions creating the waves inward and outward from To are consistent with a mass-loading disk created by a short period of acceleration of the ions by the Jovian corotation electric field followed by reneutralization, producing a spray of SO, SO2, S, and possibly H2S across the magnetic field similar to the spray proposed for the neutral sodium cloud by Wilson and Schneider [1999]. When these fast neutrals are reionized farther from to, they lead to wave growth MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000172049300135 L2 - PLASMA TORUS; GALILEO; DISPERSION; ATMOSPHERE; ENCOUNTER SO - Journal of Geophysical Research-Space Physics 2001 ;106(A11):26233-26242 4179 UI - 14033 AU - Russell CT AU - Blanco-Cano X AU - Strangeway RJ AD - Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095, USAUniv Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095, USAUniv Mexico, Space Phys Dept, Mexico City 04510, DF, MexicoRussell, CT, Univ Calif Los Angeles, Inst Geophys & Planetary Phys, 3845 Slichter Hall,MS 156704, Los Angeles, CA 90095 USA TI - Ultra-low-frequency waves in the Jovian magnetosphere: causes and consequences AB - Mass loading of the Jovian magnetosphere at Io requires a process to remove those ions from the magnetic field in order to maintain a steady state. One possible such process is the convection of the magnetized ions to the reconnection site in the distant night magnetosphere where the ions are released from the closed held lines and leave the Jovian system via the magnetic tail. A competing process is the pitch angle scattering of the ions from the field lines into the loss cone and then into the upper atmosphere. The magnetic field measurements on the Galileo spacecraft are used to determine the radial variation of wave power that could cause pitch angle scattering of these particles. We, conclude that, while this process does act, it is too weak to cause significant losses from the equatorial magnetosphere. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000167712600007 L2 - INITIAL GALILEO OBSERVATIONS; MIDDLE MAGNETOSPHERE; CURRENT SHEET; DYNAMICS; INNER; IO SO - Planetary and Space Science 2001 ;49(3-4):291-301 4180 UI - 12300 AU - Ryabov AD AU - Sukharev VS AU - Alexandrova L AU - Le Lagadec R AU - Pfeffer M AD - Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaGV Plekhanov Russian Econ Acad, Div Chem, Moscow 113054, RussiaUNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoUNAM, Inst Quim, Mexico City 04510, DF, MexicoUniv Strasbourg 1, UMR CNRS 7513, Lab Synthese Metallo Induites, F-67070 Strasbourg, FranceRyabov, AD, Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia TI - New synthesis and new bio-application of cyclometalated ruthenium(II) complexes for fast mediated electron transfer with peroxidase and glucose oxidase MH - France MH - Mexico|Distrito Federal MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000172495000032 L2 - P-NITROPHENYL ESTER; HORSERADISH-PEROXIDASE; HYDROGEN-PEROXIDE; ASPERGILLUS-NIGER; ORGANIC-SYNTHESIS; COMPOUND-I; OXIDATION; LIGANDS; PALLADACYCLES; CATALYSIS SO - Inorganic Chemistry 2001 ;40(25):6529-6532 4181 UI - 13505 AU - Ryvarden L AU - Guzman G AD - Dept Bot, N-316 Oslo, NorwayInst Ecol, Xalapa 91000, Veracruz, MexicoRyvarden, L, Dept Bot, POB 1045 Blindern, N-316 Oslo, Norway TI - Studies in neotropical polypores 12 - New and noteworthy polypores from Mexico AB - Fifteen species of Polyporaceae from Mexico are discussed: three new species: Anteodiella tuberculata Tyromyces mexicanus and T. subviride; eight new records for the Mexican mycobiota: Antrodiella semisupina, Fomitopsis nivosa Junghuhnia subundata, Oligoporus leucomallellus, Polyporus udus, Protomerulius substuppeus, Tyromyces pseudolacteus and Wrightoporia tropicalis; and five known species from new localities within the country. Keys to the known neotropical species of Antrodiella and Tyromyces are also presented MH - Mexico|Veracruz MH - Norway PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000169237400018 L2 - Polyporaceae;Central America SO - Mycotaxon 2001 ;78():245-256 4182 UI - 13685 AU - Sabelkin VP AU - Rojo MAH AD - Kharkov State Aerosp Univ, Dept Aircraft Engn, UA-310070 Kharkov, Ukraine. Inst Mexicano Petr, Dept Prod Technol, Mexico City 07730, DF, Mexico TI - Industrial applications of the superplastic explosive forming AB - The impulsive forming is widely used in the modern industry, The superplastic impulsive forming isn't well known, though could have useful applications. Applied aspects of the superplastic impulsive forming problem, including both control external stress and heat influence parameters are stated in the present research. The problem is reproduced in the vector representation of optimizing functions. In the case of the limited number of measurements the task leads to well known scale c representations with similar physical characteristics. In the technological processes considered here forming pressures are generated by the impulsive energy sources on the base of high explosives. Preheating of the deformed workpiece is performed from the autonomous heat power source or workpieces are heated during forming process MH - Mexico|Distrito Federal MH - Ukraine T3 - SUPERPLASTICITY IN ADVANCED MATERIALSMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle1BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBS10P AV - English IS - 0255-5476 UR - ISI:000168667100010 L2 - apparatus for impulsive forming;explosive forming;multidimensional space;optimal parameters;shells;superplasticity;titanium alloys SO - 2001 ;():65-70 4183 UI - 13515 AU - Sabina FJ AU - Rodriguez-Ramos R AU - Bravo-Castillero J AU - Guinovart-Diaz R AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, CP-10400 Havana 4, CubaSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726,Delegac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Closed-form expressions for the effective coefficients of a fibre-reinforced composite with transversely isotropic constituents. II: Piezoelectric and hexagonal symmetry AB - The purpose of this paper is to determine the effective elastic, piezoelectric and dielectric properties of reinforced piezoelectric composite materials with unidirectional cylindrical fibres periodically distributed in two directions at an angle pi /3 by means of the asymptotic homogenization method, Each periodic cell of the medium is a binary piezoelectric composite wherein both constituents are homogeneous piezoelectric materials with transversely isotropic properties, This paper makes use of some results obtained in Part I. Relatively simple closed-form expressions for the overall properties are obtained by means of potential methods of a complex variable and Weierstrass elliptic and related functions. Schulgasser universal type of relations are derived in a simple new way by means of the homogenized asymptotic method. The number of local problems to get all coefficients is two, The numerical computation of these effective properties is simple. (C) 2001 Elsevier Science Lid, All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Materials Science, Multidisciplinary;Mechanics;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-5096 UR - ISI:000169247200004 L2 - fibre-reinforced composite material;inhomogeneous material;piezoelectric material;analytic functions;asymptotic analysis;ELECTROMECHANICAL PROPERTIES; HYDROPHONE APPLICATIONS; UNIVERSAL RELATIONS; HOMOGENIZATION; FIELDS; MODULI; PIEZOCOMPOSITES; CERAMICS SO - Journal of the Mechanics and Physics of Solids 2001 ;49(7):1463-1479 4184 UI - 14148 AU - Sabina FJ AU - Babich VM AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoVA Steklov Math Inst, St Petersburg Branch, St Petersburg 191011, RussiaSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726,Delegac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Low-frequency scattering of acoustic waves by a bounded rough surface in a half-plane AB - The problem of the scattering of harmonic plane waves by a rough half-plane is studied here. The surface roughness is finite. The slope of the irregularity is taken as arbitrary. Two boundary conditions are considered, those of Dirichlet and Neumann. An asymptotic solution is obtained, when the wavelength lambda of the incident wave is much larger than the characteristic length of the roughness l, by means of the method of matched asymptotic expansions in terms of the small parameter epsilon =2 pil/lambda. For the Dirichlet problem, the solution of the near and far fields is obtained up to O(epsilon (2)). The far field solution is given in terms of a coefficient that have a simple explicit expression, which also appears in the corresponding solution to the Neumann problem, already solved. Also the scattering cross section is given by simple formulas to O(epsilon (3)). It is noted that, for the Dirichlet problem, the leading term is of order epsilon (3) which, by contrast, is different from that of the circular cylinder in full space, that is, of order epsilon (-1) (log epsilon)(-2). Some examples display the simplicity of the general results based on conformal mapping, which involve arcs of circle, polygonal lines, surface cracks and the like. (C) 2001 Acoustical Society of America MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Acoustics U5 - J;Article AV - English IS - 0001-4966 UR - ISI:000167369300003 SO - Journal of the Acoustical Society of America 2001 ;109(3):878-885 4185 UI - 11876 AU - Saenz-Romero C AU - Nordheim EV AU - Guries RR AU - Crump PM AD - Univ Wisconsin, Dept Forest Ecol & Management, Russell Labs 120, Madison, WI 53706, USAUniv Wisconsin, Dept Stat, Madison, WI 53706, USASaenz-Romero, C, Univ Michoacana San Nicolas de Hidalgo, Inst Invest Recursos Nat, Apartado Postal 2-105, Morelia 58041, Michoacan, Mexico TI - A case study of a provenance/progeny test using trend analysis with correlated errors and SAS PROC MIXED AB - A statistical analysis was performed on data from a provenance test of Pinus banksiana LAMB. 1.5 year-old open-pollinated seedlings from 47 stands collected in five distinct soil-moisture classes within a pine-barren landscape, in west-central Wisconsin. A large-scale environmental gradient across the nursery bed and small-scale among-microsite variability were evident in seedling responses. We compared three analyses in terms of their capabilities for accounting for such within-experimental area variation: (A) a "standard analysis" using ANOVA for a randomized complete block design, (B) trend analysis in addition to (A), and (C) correlated errors in addition to (B). PROC GLM of the Statistical Analysis System (SAS) was used for analyses (A) and (B); PROC MIXED was necessary for analysis (C). We concluded that analysis (C) was the best option for adequately modeling the data, reducing the error variance and consequently, detecting significant differences among sets of stands grouped by soil-moisture classes. We suggest that the row and column position of each experimental unit in provenance or progeny tests with forest species be recorded in order to allow for the possibility of conducting analysis of this type. As an important caveat, we found an unexpected bimodal likelihood surface when PROC MIXED included a term for correlation among plots; this requires use of the PARMS statement when applying PROC MIXED MH - Mexico|Michoacan MH - USA PB - FRANKFURT: J D SAUERLANDERS VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Forestry;Genetics & Heredity U5 - J;Article AV - English IS - 0037-5349 UR - ISI:000173510800007 L2 - trend analysis;correlated errors;spatial autocorrelation;PROC MIXED;provenance test;progeny test;Pinus banksiana;genetic variation;within block variability;PLOT EXPERIMENTS SO - Silvae Genetica 2001 ;50(3-4):127-135 4186 UI - 14046 AU - Saenz A AU - Chavarri D AU - Hernandez R AU - Castano VM AD - UNAM, Inst Fis, Queretaro 76000, MexicoUniv Nacl, Dept Fis, Heredia, Costa RicaUniv Costa Rica, Escuela Fis, CICIMA, San Jose, Costa RicaCastano, VM, UNAM, Inst Fis, Apartado Postal 1-1010, Queretaro 76000, Mexico TI - Influence of substrate temperature on phase formation in Al-Cr thin films AB - Thin films (of the order of nm) of Al-Cr alloys were prepared by successive depositions by an electron gun in a vacuum chamber. Three Al and two Cr layers, of thicknesses as to yield the final composition, were deposited on both hot (350 degreesC and 440 degreesC) and cold (70 degreesC and 108 degreesC) substrates and the phases formed were characterized in each case by X-ray diffraction and TEM observations, both in bright and in dark field conditions. The results show that on the hot substrates, Bragg peaks that do not correspond to any reported crystalline or quasi-crystalline phase appear. Both the samples on cold substrates and those heated afterwards showed an amorphous structure by X-ray diffractometry but TEM demonstrated the presence of tiny faulted crystallites, with the same Bragg reflections than those deposited on hot substrates. The results show that, for the composition range studied, a new phase not reported before appears and the substrate temperature only produces crystallite growth, not the formation of new phases MH - Costa Rica MH - Mexico|Queretaro PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1432-8917 UR - ISI:000167646100002 L2 - Al-Cr;alloys;amorphous;kinetics;micro-phases;multilayered structures;quasicrystals;thin films;transmission electron microscopy;X-ray diffraction;QUASI-CRYSTALLINE; ALLOYS SO - Materials Research Innovations 2001 ;4(4):216-221 4187 UI - 14306 AU - Sagar RP AU - Ramirez JC AU - Esquivel RO AU - Ho M AU - Smith VH AD - Univ Autonoma Metropolitana, Dept Quim, Mexico City 09340, DF, MexicoQueens Univ, Dept Chem, Kingston, ON K7L 3N6, CanadaSagar, RP, Univ Autonoma Metropolitana, Dept Quim, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Shannon entropies and logarithmic mean excitation energies from cusp- and asymptotic-constrained model densities AB - A model correctly describing the asymptotic behavior of the charge density is used to derive an expression for the Shannon entropy in terms of the ionization potential of the system, a strong similarity is observed between this model entropy and the entropy obtained from correlated wave functions providing evidence that it is the asymptotic regions that are responsible for the behavior of the entropy. We also show via a model entropy that the behavior of the momentum space Shannon entropy is due to a correct description of the cusp behavior at the nucleus. The changes in the position and momentum space entropies as a function of a parameter are shown to be linearly related for these models. The expression for the entropy, derived from a density model that obeys the asymptotic behavior, is shown to be almost identical in nature to the general expression for entropy emanating in the stopping power formalism MH - Canada MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000166867900049 L2 - ATOMIC INFORMATION ENTROPIES; LONG-RANGE BEHAVIOR; IONIZATION-POTENTIALS; MOMENTUM DENSITIES; ELECTRON-DENSITY; CHARGE; MECHANICS; MOLECULES; DISTANCE SO - Physical Review A 2001 ;6302(2): 4188 UI - 12136 AU - Sahay PN AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoSahay, PN, CICESE, Dept Seismol, POB 434843, San Diego, CA 92143, USA TI - Dynamic Green's function for homogeneous and isotropic porous media AB - The source terms that are meaningful in dynamic poroelasticity are those exciting the centre-of-mass field and the internal field. These fields are the sum of the mass weighted motion and the difference motion of the solid and fluid constituents, respectively. The corresponding homogeneous and isotropic Green's function valid for a uniform whole-space is obtained using Kupradze's method after the vector differential equations for these two fields are combined and expressed as a 6 x 6 matrix differential operator. The solution is quite amenable to numerical calculations and the results for a saturated Berea sandstone show that the fast P and S waves correspond to those usually detected by geophones at large distances from the source. The slow P wave, which is associated with fluid flow, is rapidly attenuated with distance from the source while the slow S wave, which is part of the solution, dies off rapidly in the near-neighbourhood of the source MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000172903700011 L2 - Green's Function;fundamental solution;porous media;SEISMIC-WAVE PROPAGATION SO - Geophysical Journal International 2001 ;147(3):622-629 4189 UI - 13949 AU - Sahay PN AU - Spanos TJTT AU - De la Cruz V AD - Ctr Invest Cient & Educ Super Ensenada, Dept Seismol, Ensenada 22860, Baja California, MexicoUniv Alberta, Dept Phys, Edmonton, AB T6G 2J1, CanadaSahay, PN, CICESE, Dept Seismol, POB 434843, San Diego, CA 92143, USA TI - Seismic wave propagation in inhomogeneous and anisotropic porous media AB - A set of macroscopic equations of motion for inhomogeneous and anisotropic porous media is constructed. The porous medium considered consists of an elastic solid with interconnected void spaces filled with a chemically inert viscous fluid. The constituents are assumed homogeneous in their material properties, but the unperturbed porosity is spatially varying and the distributions of pores and interfaces are uneven. The physics at the pore scale, which underpins the approach, is never lost sight of. Although very different in approach from that taken by Blot, a close correspondence to the Blot (1962) theory is established ill this paper. The dynamic perturbation in porosity accompanying deformation is treated as kinematically independent of the macroscopic solid displacement field and the macroscopic fluid velocity field. The viscous loss within the pore fluid, which is absent in the Blot approach, is not excluded here. For the most general case, 27 independent macroscopic parameters enter into the macroscopic constitutive equations, not counting the spatial gradient of unperturbed porosity itself, which appears explicitly at various places. Whereas the elastic constants of the constituents are contained within Blot's parameters, here they are factored out. Thus, the parameters are directly linked to the manner in which distributed pores and interfaces control the deformation MH - Canada MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000168048000015 L2 - anisotropy;inhomogeneous media;porosity;seismic wave propagation SO - Geophysical Journal International 2001 ;145(1):209-222 4190 UI - 13218 AU - Salas-Coronado R AU - Vasquez-Badillo A AU - Medina-Garcia M AU - Garcia-Colon JG AU - Noth H AU - Contreras R AU - Flores-Parra A AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Chem, Mexico City 07000, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyFlores-Parra, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Chem, AP 14-740, Mexico City 07000, DF, Mexico TI - Hydrogen bonds and preferred conformation of optically active amides AB - Preferred conformations and hydrogen bonds of [R]-N-benzylmandelamide 1, [S]-N-(alpha -phenylglycinyl)acetamide 2, [S]-N-(alpha -phenylgiycinyl)tosylamide 3, N-(N ' -benzyl-alpha -phenylglycinyl)acetamide 4, [S]-N-(N ' -benzyl-alpha -phenylglycinyl)tosylamide 5 and [N-(beta -benzoylpropyl)-N,N ' -dicyclohexyl]urea 6 are reported. The preferred conformation of 1-6 and hydrogen bonds were determined in solution by NMR and in the solid state by the X-ray diffraction analyses of 1-3, 5 and 6, and confirmed by ab-initio molecular calculations [6-31G(d)]. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000170050100023 L2 - hydrogen bonds;chiral amides;NMR;X-ray;[6-31G(d)] calculations;DERIVATIVES; RESOLUTION; COMPLEXES; POTENT; ETHERS; ACIDS SO - Journal of Molecular Structure-Theochem 2001 ;543():259-275 4191 UI - 12514 AU - Salas-Gonzalez R AU - Houllier F AU - Lemoine B AU - Pignard G AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoInst Politecn Coimbra, Dept Florestal, Escola Super Agr Coimbra, P-03040 Coimbra, PortugalCIRAD, Unite Mixte Rech CIRAD INRA Modelisat Plantes, F-34398 Montpellier, FranceINRA, Unite Rech Forestieres, F-55610 Pierroton, Cestas, FranceInventaire Forestier Natl, F-34970 Maurin Lattes, FranceSalas-Gonzalez, R, Univ Nacl Autonoma Mexico, Inst Ecol, Ap Postal 70-275, Mexico City 04510, DF, Mexico TI - Forecasting wood resources on the basis of national forest inventory data. Application to Pinus pinaster Ait. in southwestern France AB - The objective of this paper is to propose a method for simulating and predicting the evolution of wood resources in the 'Landes de Gascogne' region. Lemoine's growth and yield model has been successfully utilized to predict future timber resources from existing data collected in two successive surveys (1977 and 1988) conducted by the National Forest Inventory (NFI). Lemoine's model was calibrated by analysing the error in estimation of stand features between the NFI plots and experimental plots originally used to built Lemoine's model. The proposed corrected term is based on the best linear unbiased predictor of the error. The calibrated model exhibited a better accuracy than the original model version. We suggest that coupling the calibrated Lemoine's model with NFI data is a useful method for predicting timber resources at a regional level MH - France MH - Mexico|Distrito Federal MH - Portugal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Forestry U5 - J;Article AV - English IS - 1286-4560 UR - ISI:000171896800007 L2 - wood resource;national forest inventory;growth model;model calibration;maritime pine;GROWTH; STANDS; YIELD SO - Annals of Forest Science 2001 ;58(7):785-802 4192 UI - 13320 AU - Salas J AU - Garcia-Ladona E AU - Font J AD - CSIC, Inst Ciencies Mar, E-08039 Barcelona, SpainBCS Miraflores, CICESE, Beja California Sur 23050, MexicoGarcia-Ladona, E, CSIC, Inst Ciencies Mar, Passeig Joan Borbo,S-N, E-08039 Barcelona, Spain TI - Statistical analysis of the surface circulation in the Algerian Current using Lagrangian buoys AB - The Algerian Current (AC) is one of the most energetic flows in the Mediterranean basin. A characteristic picture of this current is formed by a series of mesoscale eddies at different scales. Here, statistical analysis of 15 surface Argos buoy tracks in 1996-1997 provides a complete Lagrangian view of the AC. The buoys, released upstream and across a coastal meander between 0 degreesE and 1 degreesE longitude, were followed for 3 months. They travelled eastward at an average speed of 14 cm/s and showed high energetic fluctuations related to several mesoscale eddies. The characteristic integral time and space scales are highly anisotropic. For the zonal component, these are about 4 days and 66 km, and for the meridional component, about 2 days and 26 km. Representative values of effective diffusivities from single dispersion statistics are within 0.7-1.3 X 10(8) and 1.5-6.0 X 10(7) cm(2)/s for the zonal and meridional directions, respectively. A local analysis shows that mesoscale motions are particularly relevant in the region 1-3 degreesE and 7-8 degreesE, provided the considerably high values of eddy kinetic energy in comparison with the mean kinetic energy. Eddy-mean current interactions are evidenced by the significant changes of sign of horizontal covariance from west to east. Finally, an Eulerian picture of the AC is built, exhibiting similar trends than previous and recent field observations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0924-7963 UR - ISI:000169711800005 L2 - surface circulation;Algerian current;Lagrangian buoys;MEDITERRANEAN-SEA; ALBORAN-SEA; DRIFTER OBSERVATIONS; EDDY STATISTICS; NORTH-ATLANTIC; SOFAR FLOATS; VARIABILITY; MESOSCALE; WATER; BASIN SO - Journal of Marine Systems 2001 ;29(1-4):69-85 4193 UI - 12097 AU - Salas M AU - In't Veld BA AU - van der Linden PD AU - Hofman A AU - Breteler M AU - Stricker BH AD - Erasmus Univ, Sch Med,Med Ctr, Dept Epidemiol & Biostat, Pharmacoepidemiol Unit, NL-3000 Rotterdam, NetherlandsConsejo Nacl Ciencia & Technol, Mexico City, DF, MexicoInspectorate Hlth Care, Drug Safety Unit, The Hague, NetherlandsStricker, BH, Erasmus Univ, Sch Med,Med Ctr, Dept Epidemiol & Biostat, Pharmacoepidemiol Unit, POB 1738, NL-3000 Rotterdam, Netherlands TI - Impaired cognitive function and compliance with antihypertensive drugs in elderly: The Rotterdam Study AB - Background: To our knowledge, there are no epidemiologic studies on the association between cognitive impairment and noncompliance with antihypertensive therapy. We studied compliance with antihypertensive treatment in elderly patients with cognitive impairment. Methods: The Rotterdam Study is a prospective community-based cohort study of 7983 residents greater than or equal to 55 years old. We studied 1979 participants in the study who had 2 consecutive Mini Mental State Examination (MMSE) assessments in the period from 1991 to 1996, who did not have dementia at baseline, and who had received 3 or more consecutive antihypertensive prescriptions for at least 6 months. We compared persons with MMSE scores less than or equal to 25 on both assessments to persons with MMSE scores >25 on both occasions. Compliance was estimated by dividing the number of days the subjects took antihypertensive drugs by the follow-up period in days, and it was expressed as a ratio between 0 and 1. We defined patients as compliant if they had a compliance ratio greater than or equal to0.80 and as noncompliant if they had a compliance ratio less than or equal to0.50 during the study period. Results: We followed-up on 1573 patients (mean age, 68 years) during an average period of 1609 days. The risk of noncompliance in cognitively impaired elderly subjects was 2.0 (95% confidence interval, 1.4 to 2.8) after adjustment for age, sex, education, income, living situation, and smoking. Stratification by living situation showed that the risk increase predominantly occurred in those who lived alone (odds ratio, 2.9; 95% confidence interval, 1.2 to 7.5). Conclusions. Cognitive function is an independent predictor of compliance with antihypertensive drugs in elderly patients who are living alone MH - Mexico|Distrito Federal MH - Netherlands PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 20 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0009-9236 UR - ISI:000173022500009 L2 - PATIENT COMPLIANCE; HYPERTENSION; MEDICATION; THERAPY; DEMENTIA; DISORDER; DISEASE; RISK SO - Clinical Pharmacology & Therapeutics 2001 ;70(6):561-566 4194 UI - 13827 AU - Salazar AR AU - Haldar A AD - Univ Autonoma Sinaloa, Fac Ingn, Culiacan, Sinaloa, MexicoUniv Arizona, Dept Civil Engn & Engn Mech, Tucson, AZ 85721, USASalazar, AR, Univ Autonoma Sinaloa, Fac Ingn, Culiacan, Sinaloa, Mexico TI - Energy dissipation at PR frames under seismic loading AB - The major sources of energy dissipation, lateral deformation, and base shear in steel frames with partially restrained (PR) connections subjected to seismic leading are analytically studied. The analytical study confirms, in general, the behavior observed during experimental investigation PR connections reduce the overall stiffness of frames, but add a major source of energy dissipation. It is observed, in general, that the maximum total base shear may significantly increase as the connection stiffness increases. The maximum top lateral displacement does not always increase with a decrease in the connection stiffness. The response under earthquake loading largely depends on the dynamic characteristics of both the structure and the earthquake excitation. Proper consideration of the stiffness of the. PR connections and other dynamic properties is essential to predict the dynamic behavior no matter how difficult the analysis procedure becomes MH - Mexico|Sinaloa MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Engineering, Civil U5 - J;Article AV - English IS - 0733-9445 UR - ISI:000168310700014 L2 - STEEL FRAMES; BEHAVIOR SO - Journal of Structural Engineering-Asce 2001 ;127(5):588-592 4195 UI - 14407 AU - Saldivar E AU - Araujo O AU - Giudici R AU - Lopez-Barron C AD - GIRSA Corp SA CV, CID, Lerma, MexicoRhodia, Campinas, SP, BrazilUniv Sao Paulo, Dept Engn Quim, BR-05508 Sao Paulo, BrazilSaldivar, E, GIRSA Corp SA CV, CID, Av Sauces 87,Mza6, Lerma, Mexico TI - Modeling and experimental studies of emulsion copolymerization systems. II. Styrenics AB - Using a model previously published, predictions for evolution of conversion and average particle diameter in batch experiments are compared against experimental data for four emulsion copolymerizations of styrene with the following monomers: (1) methyl methacrylate, (2) butyl acrylate, (3) butadiene, and (4) acrylic acid. For each copolymerization system the experiments covered simultaneous variations in five variables: initiator and surfactant concentrations, water to monomer ratio, monomer composition, and temperature. It is shown that after data fitting for unknown or uncertain parameters, the model is capable of explaining quantitatively the experimental observations for conversion evolution and only qualitatively the particle size evolution data. This points out to the possible contribution of particle nucleation mechanisms other than the micellar one, which is the only mechanism included in the model. Some of the adjustable parameter values were found to depend on the copolymer composition. The only case in which the model does not perform well is in the prediction of the effect of initiator concentration on the copolymerization rate for butadiene-rich formulations. It is also found that the model predictions are very sensitive to the value of the diffusion coefficients of monomeric radicals in the copolymer particle, which are not readily available in the literature. It is concluded that it is important to independently measure these parameters in order to enhance the predictive power of models. It is also concluded that the model can be useful for practical applications. (C) 2001 John Wiley & Sons, Inc MH - Brazil MH - Mexico|Estado De Mexico PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000166698200008 L2 - emulsion copolymerization;mathematical modeling;POLYMERIZATION REACTORS; METHYL-METHACRYLATE; BUTYL ACRYLATE; KINETICS; BATCH; BUTADIENE; RADICALS; MONOMERS SO - Journal of Applied Polymer Science 2001 ;79(13):2380-2397 4196 UI - 11231 AU - Salgado-Ortiz J AU - Figueroa-Esquivel EM AU - Larios-Guzman S AU - Robertson RJ AD - Queens Univ, Dept Biol, Kingston, ON K7L 3N6, CanadaUniv Nacl Autonoma Mexico, Fac Ciencias, Museo Zool Alfonso L Herrera, Mexico City 04510, DF, MexicoAviario Puebla, Puebla, MexicoSalgado-Ortiz, J, Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada TI - Descriptions of nests and eggs of the Green-backed Sparrow and the Grey-throated chat from the Yucatan peninsula, Mexico AB - We describe for the first time the characteristics of the nests and eggs of the Green-backed Sparrow (Arremonops chloronotus) and the Grey-throated Chat (Granatellus sallaei) with additional notes on breeding behavior These two species are endemic to southern Mexico. Belize, and the northern portion of Guatemala where they are fairly common. Three nests of the Green-backed Sparrow were found on the ground, two in young successional and one in undisturbed subperennial forest. Each nest was domed with two unspotted white eggs. Two cup-shaped nests of the Grey-throated Chat were found in the understory of young successional forest. and the two eggs found in one of them were white with a pinkish wash MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000175238800011 SO - Wilson Bulletin 2001 ;113(3):328-331 4197 UI - 13687 AU - Salinas-Garcia JR AU - Baez-Gonzalez AD AU - Tiscareno-Lopez M AU - Rosales-Robles E AD - Ctr Nacl Prod Sostenible, Inst Nacl Invest Forestales Agr & Pecuarias, Morelia 58070, Michoacan, MexicoCtr Invest Reg Noreste, Inst Nacl Invest Forestales Agr & Pecuarias, Rio Bravo, Tamaulipas, MexicoSalinas-Garcia, JR, Inst Nacl Invest Forestales Agr & Pecuarias, Ctr Nacl Prod Sostenible, POB 70, Progreso, TX 78579 USA TI - Residue removal and tillage interaction effects on soil properties under rain-fed corn production in Central Mexico AB - Determining the effects of residue removal and tillage systems on surface crop residue accumulation, organic carbon sequestration and nutrient cycling is essential for sustainable land management. This study evaluated the effects of 6 years of conventional and conservation tillage with different amounts of crop residues left on the soil surface on selected soil properties of a Vertisol and an Andisol used for rain-fed corn (Zea mays L.) production in Central Mexico (Apatzingan and Casas Blancas, Mich.). The results showed that conservation tillage. i.e. no tillage (NT) with 100, 66 and 33% of crop residues left on the field, and minimum tillage (MT), significantly increased surface crop residue accumulation on the soil surface. In the 0-50 mm surface layer. organic C, microbial biomass C and N, inorganic and total N. and extractable P were approximately twice higher with NT/100%, NT/66%, NT/33%. and MT than with conventional tillage (CT) and NT/0% treatments. Higher levels of soil organic C, microbial biomass C and N, inorganic and total N, and extractable P were directly related to surface accumulation of crop residues promoted by conservation tillage management. Removal of surface crop residues can seriously reduce production sustainability in climates where stressful conditions occur. In general, the mid-term (6 years) sustainability of Vertisol and Andisol for rain-fed corn production seemed to be enhanced by conservation tillage management. To obtain the benefits of conservation tillage in the sub-humid tropical region of Apatzingan (Vertisols), where organic matter is rapidly oxidized, it is necessary to leave at least 60% of the crop residue on the soil surface, while in the sub-humid temperate region of Casas Blancas (Andisol), where organic matter is oxidized slower, leaving 30% of crop residue is sufficient. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - Mexico|Tamaulipas MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Soil Science U5 - J;Article AV - English IS - 0167-1987 UR - ISI:000168632800007 L2 - tillage;surface crop residues;soil organic carbon;microbial biomass C and N;total and inorganic N;nutrient distribution;Mexico;ORGANIC-MATTER DYNAMICS; MICROBIAL BIOMASS; NO-TILLAGE; NITROGEN-FERTILIZATION; MINERALIZABLE-C; ZERO-TILLAGE; SYSTEMS; CARBON; NUTRIENT SO - Soil & Tillage Research 2001 ;59(1-2):67-79 4198 UI - 13893 AU - Salinas E AU - Roca A AU - Cruells M AU - Patino F AU - Cordoba DA AD - Univ Autonoma Estado Hidalgo, Ctr Invest Mat & Met, Pachuca, Hidalgo, MexicoUniv Barcelona, Dept Engn Quim & Met, E-08028 Barcelona, SpainRoca, A, Univ Autonoma Estado Hidalgo, Ctr Invest Mat & Met, Pachuca, Hidalgo, Mexico TI - Characterization and alkaline decomposition-cyanidation kinetics of industrial ammonium jarosite in NaOH media AB - A complete characterization was carried out on a jarositic residue from the zinc industry. This residue consists of ammonium jarosite, with some contents of H3O+, Ag+, Pb2+, Na+ and K+ in the alkaline "sites" and, Cu2+ and Zn2+ as a partial substitution of iron. The formula is: [Ag0.001Na0.07K0.02Pb0.007(NH4)(0.59)(H3O)(0.31)]Fe-3(SO4)(2)(OH)(6). Some contents of franklinite (ZnO . Fe2O3), gunninguite (ZnSO4.H2O) and quartz were also detected. The jarosite is interconnected rhombohedral crystals of 1-2 mum, with a size distribution of particles of 2-100 mum. which could be described by the Rosin-Rammler model. The alkaline decomposition curves exhibit an induction period followed by a progressive conversion period; the experimental data are consistent with the spherical particle with shrinking core model for chemical control. The alkaline decomposition of the ammonium jarosite can be shown by the following stoichiometric formula: NH4Fe3(SO4)(2)(OH)(6(s)) + 3OH((aq))(-) --> (NH)(4(aq))(+) + 3Fe(OH)(3(s)) + 2SO(4(aq)r)(2-) The decomposition (NaOH) presents an order of reaction of 1.1 with respect to the [OH-] and an activation energy of 77 kJ mol(-1). In NaOH/CN- media, the process is of 0.8 order with respect to the OH- and 0.15 with respect to the CN-. The activation energy was 46 kJ mol(-1). products obtained are amorphous. Franklinite was not affected during the decomposition process. The presence of this phase is indicative that the franklinite acted like a nucleus during the ammonium jarosite precipitation. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0304-386X UR - ISI:000168242800004 L2 - alkaline decomposition;cyanidation;kinetics;ammonium jarosite;PLUMBOJAROSITE SO - Hydrometallurgy 2001 ;60(3):237-246 4199 UI - 13958 AU - Salinas F AU - Espinosa-Mansilla A AU - Lopez-Martinez L AU - Lopez-de-Alba PL AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, MexicoUniv Extremadura, Dept Quim Analit, E-06071 Badajoz, SpainLopez-de-Alba, PL, Univ Guanajuato, Inst Invest Cient, Guanajuato 36000, Mexico TI - Selective extraction-spectrophotometric determination of microamounts of palladium in catalysts AB - A new thiosemicarbazone reagent, phthalaldehydic acid thiosemicarbazone (PAATSC) has been synthesized, and found to he a good chromogenic reagent for palladium. A method for the extraction-spectrophotometric determination of palladium is described. PAATSC-Pd(II) yellow complex was extracted from an aqueous solution (pH 4, HAc/NaAc 2 mol l(-1)) into a MIBK layer. The absorbance was measured at 355 nm and the apparent molar absorptivity (epsilon) was found to he 5.1 x 10(4) l mol(-1) cm(-1). The effect of pH, PAATSC concentration and shaking time were studied. The complex system conforms to Beer's law over the range 0.1 -2.0 mug ml(-1) palladium(II). The detection limit was 23 ng ml(-1). The: tolerance limit for many metals has been determined. The method is simple and rapid, with high sensitivity and good selectivity. Finally, the method has been applied successfully to the determination of palladium in synthetic mixtures and in the palladium-activated charcoal, used as a catalyst MH - Mexico|Guanajuato MH - Spain PB - WARSAW: INSTYTUT CHEMII FIZYCZNEJ PAN RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0009-2223 UR - ISI:000167982800009 L2 - thiosemicarbazones;phthalaldehydic acid;3-hydroxyphthalide;palladium determination;extraction-spectrophotometric;THIOSEMICARBAZONES; SEMICARBAZONES SO - Chemia Analityczna 2001 ;46(2):239-248 4200 UI - 13615 AU - Salmeron J AU - Hu FB AU - Manson JE AU - Stampfer MJ AU - Colditz GA AU - Rimm EB AU - Willett WC AD - Harvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115, USABrigham & Womens Hosp, Channing Lab, Div Prevent Med, Dept Med, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA, USAInst Mexicano Seguro Social, Unidad Invest Epidemiol, Mexico City, DF, MexicoInst Mexicano Seguro Social, Serv Salud, Mexico City, DF, MexicoHu, FB, Harvard Univ, Sch Publ Hlth, Dept Nutr, 665 Huntington Ave, Boston, MA 02115 USA TI - Dietary fat intake and risk of type 2 diabetes in women AB - Background: The long-term relations between specific types of dietary fat and risk of type 2 diabetes remain unclear. Objective: Our objective was to examine the relations between dietary fat intakes and the risk of type 2 diabetes. Design: We prospectively followed 84204 women aged 34-59 y with no diabetes, cardiovascular disease, or cancer in 1980. Detailed dietary information was assessed at baseline and updated in 1984, 1986, and 1990 by using validated questionnaires. Relative risks of type 2 diabetes were obtained from pooled logistic models adjusted for nondietary and dietary covariates. Results: During 14 y of follow-up, 2507 incident cases of type 2 diabetes were documented. Total fat intake, compared with equivalent energy intake from carbohydrates, was not associated with risk of type 2 diabetes; for a 5% increase in total energy from fat, the relative risk (RR) was 0.98 (95% CI: 0.94, 1.02). Intakes of saturated or monounsaturated fatty acids were also not significantly associated with the risk of diabetes. However, for a 5% increase in energy from polyunsaturated fat, the RR was 0.63 (0.53, 0.76; P < 0.0001) and for a 2% increase in energy from trans fatty acids the RR was 1.39 (1.15, 1.67; P = 0.0006). We estimated that replacing 2% of energy from trans fatty acids isoenergetically with polyunsaturated fat would lead to a 40% lower risk (RR: 0.60; 95% CI: 0.48, 0.75). Conclusions: These data suggest that total fat and saturated and monounsaturated fatty acid intakes are not associated with risk of type 2 diabetes in women, but that trans fatty acids increase and polyunsaturated fatty acids reduce risk, Substituting nonhydrogenated polyunsaturated fatty acids for trans fatty acids would likely reduce the risk of type 2 diabetes substantially MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 149 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000168878600007 L2 - dietary fat;polyunsaturated fat;trans fatty acids;type 2 diabetes;risk;women;CORONARY HEART-DISEASE; FOOD FREQUENCY QUESTIONNAIRE; INSULIN SENSITIVITY; PHYSICAL-ACTIVITY; ACID COMPOSITION; GLYCEMIC LOAD; MELLITUS; REPRODUCIBILITY; CHOLESTEROL; VALIDITY SO - American Journal of Clinical Nutrition 2001 ;73(6):1019-1026 4201 UI - 11147 AU - Salmones J AU - Zeifert B AU - Cabanas-Moreno JG AU - guilar-Rios G AU - Rojas F AU - Ramirez-Cuesta A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Chim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoInst Politecn Nacl, Mexico City 07300, DF, MexicoUniv Reading, Dept Chem, Reading RG6 6AD, Berks, EnglandRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Chim, POB 55-534, Mexico City 09340, DF, Mexico TI - Textural characterisation of iron-promoted Raney nickel catalysts synthesised by mechanical alloying AB - Mesoporous binary AlxNiy and ternary AlxNiyFez Raney-type catalysts were synthesised by a two-step procedure involving two main processes, i.e. (i) mechanical metal alloying and (ii) alkaline aluminium leaching. Pure metallic powders of Al, Ni and Fe (if required) were first mechanically alloyed in an attrition mill and then subjected to KOH leaching to selectively remove part of the aluminium atoms. After a slow drying process, a fine, nanostructured slit-shaped material was obtained. Substrate characterisation involved studies by atomic absorption (AA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS) in the SEM and nitrogen physisorption. An intermetallic beta- or B2-(AlNi) phase with a metastable bcc crystalline structure was formed as a non-equilibrium phase after the metal alloying process. Because of aluminium removal, the beta-(AlNi) phase was transformed into the more stable nickel fcc structure. In this work, some important physicochemical properties of binary (Al-Ni) and ternary (Al-Ni-Fe) catalysts, with especial attention to textural properties adduced from nitrogen physisorption, are presented and discussed MH - United Kingdom MH - Mexico|Distrito Federal PB - BRENTWOOD: MULTI SCIENCE PUBL CO LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0263-6174 UR - ISI:000175594000006 L2 - CAPILLARY CONDENSATION; METAL-ALLOYS SO - Adsorption Science & Technology 2001 ;19(10):871-885 4202 UI - 13134 AU - Sampaio E AU - Maris S AU - Rita P AD - Univ Strasbourg 1, Lab Etud Syst Percept & Emot, F-67000 Strasbourg, FranceUniv Wisconsin, Dept Rehabil Med, Madison, WI, USAUniv Wisconsin, Dept Biomed Engn, Madison, WI, USAUniv Autonoma Estado Morelos, Fac Med, Cuernavaca, Morelos, MexicoSampaio, E, Univ Strasbourg 1, Lab Etud Syst Percept & Emot, 12 Rue Goethe, F-67000 Strasbourg, France TI - Brain plasticity: 'visual' acuity of blind persons via the tongue AB - The 'visual' acuity of blind persons perceiving information through a newly developed human-machine interface, with an array of electrical stimulators on the tongue, has been quantified using a standard Ophthalmological test (Snellen Tumbling E). Acuity without training averaged 20/860. This doubled with 9 h of training. The interface may lead to practical devices for persons with sensory loss such as blindness, and offers a means of exploring late brain plasticity. (C) 2001 Elsevier Science BY. All rights reserved MH - France MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 29 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000170374300012 L2 - sensory substitution;blind;tactile;brain plasticity;tongue;CORTEX SO - Brain Research 2001 ;908(2):204-207 4203 UI - 11517 AU - Samuel AM AU - Samuel FH AU - Villeneuve C AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, Met Proc Grp, Gen Motors Powertrain, Milford, NH 03055, USACorp Nemak, Garza Garcia 66221, NL, MexicoSamuel, FH, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Effect of trace elements on beta-Al5FeSi characteristics, porosity and tensile properties of Al-Si-Cu (319) cast alloys AB - This study was performed on an Al-6.2 % Si-3.7 % Cu-0.37 % Fe-0.095 % Mn (A319.2) alloy, to study the effect of trace elements on the beta-Al5FeSi intermetallic phase characteristics observed in the alloy and the resultant tensile properties. The results show that increasing the iron content leads to precipitation of long, branched platelets of the beta-Al5FeSi phase. These platelets (or needles as they appear in the microstructure) often result in the formation of large shrinkage cavities due to the inability of the liquid metal to fill the spaces between the branched platelets. The alloy tensile properties are greatly improved by: a) Sr addition in the range 200-400 ppm, b) increasing the Mn/Fe ratio to 0.7, c) addition of 0.08 % Be, d) addition of 0.08 % Be + 0.02 % Sr. The results indicate that the classic neutralization treatment of using a Mn addition with or without Cr could be replaced by the combined 0.08 % Be + 0.02 % Sr addition. The latter combination produces a much better improvement in the alloy ductility. The rupture mode changes from transgranular to intergranular as the iron concentration is increased from 0.5% to 1.5%. Fragmentation of the beta-Al5FeSi platelets using Sr or Be + Sr, or their transformation into alpha-Al-15(Fe,Mn,Cr)(3)Si-2 in the form of Chinese script or sludge particles (using Mn or Mn + Cr) results in a ductile dimpled rupture surface MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - SHEFFIELD: CASTINGS TECHNOLOGY INT RP - NOT IN FILE U3 - TC 11 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000174675200003 L2 - Al-Si-Cu alloy;tensile properties;beta-Al5FeSi platelets;porosity;HEAT-TREATMENT; FE; DISSOLUTION; PHASES SO - International Journal of Cast Metals Research 2001 ;14(2):97-120 4204 UI - 12961 AU - Samuel FH AU - Samuel AM AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, Met Proc Grp, Gen Motors Powertrain, Milford, NH 03055, USASA CV, Corp Nemak, Res & Dev, Garza Garica 66221, NL, MexicoSamuel, FH, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Decomposition of Fe-intermetallics in Sr-modified cast 6XXX type aluminum alloys for automotive skin AB - The present study was carried out on two 6XXX type aluminum alloys: an experimental alloy and commercial 6111 alloy, containing Fe, Si, Mn, and Mg as the principal elements, and with Fe/Si ratios of 0.28 and 0.49, respectively. Measured amounts of Sr (up to 1500 ppm.) were added to these alloys. The alloy melts were cast in a graphite mold heated at 600 degreesC (cooling rate similar to0.7 degreesC s(-1)). Some of the castings were homogenized for 8 hours at 540 degreesC. The microstructural constituents were evaluated using thermal analysis and metallographic techniques. The various phases observed were identified using electron probe microanalysis (EPMA) and energy dispersive X-ray (EDX) analysis. Results show that, when the Fe/free Si ratio is <1 (free Si being the Si remaining above that required for Mg2Si formation), addition of Sr (300 to 500 ppm) destabilizes the beta -Al5FeSi phase platelets, leading to rejection of Si ahead of the beta -platelet/Al matrix interface. Increasing the concentration of Sr (similar to 800 ppm) leads to the precipitation of a new intermetallic, possibly Al2Si2Sr (in the form of short needles or rods). The iron can react with the Al to form Al6Fe, or with the remaining Si to precipitate as alpha -Al8Fe2Si in Chinese script form. A new mechanism for-the formation Of Al2Si2Sr phase has been proposed, based on the possibility that the rejected Si ahead of the destabilized beta -Al5FeSi platelets reacts with the surrounding Sr and Al to form polygonal (rounded or squarelike) particles of Al2Si2Sr. These particles are normally observed attached to the, decomposed 8 phase (or A16Fe). During homogenization treatment, the beta -Al5FeSi decomposes into A16Fe and Si. The decomposition takes place much more easily in the Sr-containing alloys. In contrast, both Al2Si2Sr and Al8Fe2Si phases are stable at temperatures as high as 540 degreesC. The introduction of Mn and Mg to the Al-Fe-Si system (viz., 6111 alloy, with a Fe/free Si ratio of 1.55) results in the precipitation of several Chinese script phases, namely, Al-15(Fe,Mn)(3)Si-2, Al-8(Fe,Mn)(2)Si, Al8Mg3FeSi6, and Mg2Si. Compared to the beta -Al5FeSi phase, the compositions of these script phases are more stable in the presence of Sr. At higher Sr levels (similar to 800 ppm. or more), partial decomposition of alpha -Al-15(Fe,Mn)3Si2 into Al-6.9(Fe,Mn)Si and Si can occur. Fragmentation of the alpha -Al-15(Fe,Mn)3Si2 phase takes place only at Sr concentrations on the order of similar to 1500 ppm MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000170682200018 L2 - SI SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2001 ;32(8):2061-2075 4205 UI - 12589 AU - San Martin F AU - Lavin P AU - Rogers JD AD - Inst Tecnol Ciudad Victoria, Victoria 87010, Tam, MexicoWashington State Univ, Dept Plant Pathol, Pullman, WA 99164, USASan Martin, F, Inst Tecnol Ciudad Victoria, Ap Postal 175 Cd, Victoria 87010, Tam, Mexico TI - Some species of Xylaria (Hymenoascomycetes, Xylariaceae) associated with oaks in Mexico AB - Fifteen taxa of the genus Xylaria growing on wood, fruit remains or leaves of Quercus spp., are reported from Mexico. Xylaria albisquamula, X. duranii, X. michoacana, X. quercinophila, X. subcoccophora, and X. tumulosa are described as new. A dichotomous key for the considered taxa is provided MH - Mexico|Tamaulipas MH - USA PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000171617200032 L2 - systematics;Quercus;cloud forest;anamorph;Mexico SO - Mycotaxon 2001 ;79():337-360 4206 UI - 12654 AU - Sanchez-Arroyo H AU - Koehler PG AU - Valles SM AD - IFIT CP, Montecillo 56230, MexicoUniv Florida, Dept Entomol & Nematol, Gainesville, FL 32611, USAValles, SM, USDA ARS, Ctr Med Agr & Vet Entomol, 1600 SW 23rd Dr, Gainesville, FL 32608 USA TI - Effects of the synergists piperonyl butoxide and S,S,S-tributyl phosphorotrithioate on propoxur pharmacokinetics in Blattella germanica (Blattodea : Blattellidae) AB - Effects of the synergists piperonyl butoxide (PBO) and S,S,S-tributyl phosphorotrithioate (DEF) on propoxur pharmacokinetics were examined in the German cockroach, Blattella germanica (L.). Treatment of adult male German cockroaches with the cytochrome P450 monooxygenase inhibitor, PBO, or the esterase inhibitor, DEF, increased propoxur toxicity by 2- and 6.8-fold, respectively, implicating hydrolysis as a major detoxification route of propoxur in the Gen-nan cockroach. However, significant hydrolytic metabolism could not be demonstrated conclusively in vitro resulting in a conflict between in situ bioassay data and in vitro metabolic studies. In vitro propoxur metabolism with NADPH-fortified microsomes produced at least nine metabolites. Formation of metabolites was NADPH-dependent; no quantifiable metabolism was detected with cytosolic fractions. However, microsomal fractions lacking an NADPH source did produce a low, but detectable, quantity of metabolites (1.6 pmol). PBO inhibited NADPH-dependent propoxur metabolism in a dose-dependent fashion, implicating cytochrome P450 monooxygenases as the enzyme system responsible for the metabolism. Interestingly, DEF also inhibited the NADPH-dependent metabolism of propoxur, albeit to a lower extent. Treatment with PBO or DEF also caused a significant reduction in the cuticular penetration rate of propoxur. The data demonstrate that unanticipated effects are possible with synergists and that caution must be exercised when interpreting synergist results MH - USA MH - Mexico|Estado De Mexico PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000171545000028 L2 - Blattella germanica;German cockroach;propoxur metabolism;pharmacokinetics;cuticular penetration;synergists;COCKROACH DICTYOPTERA; HELICOVERPA-ARMIGERA; RESISTANCE; CYTOCHROME-P450; MECHANISMS; METABOLISM; PERMETHRIN; TOXICITY; STRAINS SO - Journal of Economic Entomology 2001 ;94(5):1209-1216 4207 UI - 12728 AU - Sanchez-Castillo CP AU - Lara JJ AU - Villa AR AU - Aguirre J AU - Escobar M AU - Gutierrez H AU - Chavez A AU - James WPT AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Direcc Nutr, Dept Fisiol Nutr, Tlalpan 14000, DF, MexicoDirecc Enfermedades Cronicas, Mexico City, DF, MexicoInt Obes Task Force, London, EnglandSanchez-Castillo, CP, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Direcc Nutr, Dept Fisiol Nutr, Vasco Quiroga 15, Tlalpan 14000, DF, Mexico TI - Unusually high prevalence rates of obesity in four Mexican rural communities AB - Objective: To establish the nutritional status of previously studied rural populations. Design and subjects: A total of 139 households with 245 males and 301 females from four relatively isolated Mexican rural communities were randomly selected to be surveyed in 1996. Results: Underweight was not a problem in either children or adults. In children <5 y only three (4.2%) were stunted but the age- and sex-specific distributions of body mass index (BMI) in children showed 17% of boys and 19% of girls exceeded the proposed International Obesity Task Force limits for classifying the overweight. Triceps skinfold values were similar to NHANESI values for white USA children. Of the adult men 42% were overweight (BMI 25.0-29.9) and 9% obese; 40% of adult women were overweight and a further 33% obese. Adjusting BMI values with corrected total heights by relating them to measured knee height reduced the BMI of women >50 y by 2.0 units; the male data were essentially unchanged. The prevalence of abdominal obesity in women, based on waist measurements and WHO cut-off points was high with 25% of women having elevated values despite a normal BMI; 43% of the overweight women had substantial increases in waist measurements, indicative of high risk, as did 91% of obese women. The men's waist measurements were greater in relation to both BMI and body fat but the prevalence of values in excess of the suggested sex-specific WHO limits was less than half that of women. Conclusions: The high prevalence of overweight and obesity is now evident in poor and relatively isolated rural communities of Mexico MH - United Kingdom MH - Mexico|Distrito Federal PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 14 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0954-3007 UR - ISI:000171357500004 L2 - obesity;nutritional status;children;adult;rural;developing country;BMI;CARDIOVASCULAR RISK-FACTORS; INSULIN-RESISTANCE; SKINFOLD THICKNESS; BLOOD-PRESSURE; DEFINITION; POPULATION; CITY SO - European Journal of Clinical Nutrition 2001 ;55(10):833-840 4208 UI - 13480 AU - Sanchez-Castillo CP AU - Franklin M AU - McNeill G AU - Solano MD AU - Bonner S AU - Lopez N AU - Davidson L AU - James WPT AD - Inst Nacl Nutr Salvador Zubiran, Direcc Nutr, Dept Fisiol Nutr, Mexico City 14000, DF, MexicoRowett Res Inst, Aberdeen, ScotlandUniv Aberdeen, Dept Med & Therapeut, Aberdeen AB9 1FX, ScotlandSanchez-Castillo, CP, Inst Nacl Nutr Salvador Zubiran, Direcc Nutr, Dept Fisiol Nutr, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Are the proposed limits of energy intake : basal metabolic rate and dietary nitrogen : urinary nitrogen ratios suitable for validation of food intake? AB - The validity of 7 d weighed records of diet obtained for pre-menopausal Mexican women was assessed by two independent methods: the energy intake:BMR (EI:BMR) and the dietary N:urinary N (DN:UN). For the latter, complete urine collections are required and completeness was assessed from measurements of para-aminobenzoic acid (PABA) excretion. There were forty-six adult female subjects in the study, thirty-four were from Mexico City and twelve were from a rural population in the Central Highlands, Mexico. However, data were rejected from five urban women for whom the PABA excretion data suggested incomplete urine collection on four or more days. BMR was measured with Oxylog portable O-2 consumption meters, and physical activity level was assessed from a self-completed activity diary. An approximate relationship between the EI:BMR ratio and the DN:UN ratio suggested that the rejection limits on the EI:BMR ratio recommended by are wider than the limits on the DN:UN ratio recommended by . Using the recommended cut-off points for EI:BMR but wider limits for DN:UN, twenty-one and twenty-five women respectively had acceptable intake records by the two methods, and sixteen of them by both methods. In conclusion the modification of the DN:UN limits to 0.92 and 1.70 to set acceptable intake values makes the use of measurements of N and energy balance comparable. Urine values with PABA recoveries greater than 100 +/- 15 % should be rejected, as should UN values validated by less than 3 d MH - Mexico|Distrito Federal MH - United Kingdom PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0007-1145 UR - ISI:000169343500012 L2 - validation;food intake;methodology;FUNDAMENTAL PRINCIPLES; LIFE-STYLE; WOMEN; MEN; PHYSIOLOGY; FATNESS SO - British Journal of Nutrition 2001 ;85(6):725-731 4209 UI - 13463 AU - Sanchez-Escalante A AU - Djenane D AU - Torrescano G AU - Beltran JA AU - Roncales P AD - Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, Zaragoza 50013, SpainCtr Invest & Alimentac Dessarrollo, Hermosillo 83000, Sonora, MexicoRoncales, P, Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, C Miguel Servet 177, Zaragoza 50013, Spain TI - The effects of ascorbic acid, taurine, carnosine and rosemary powder on colour and lipid stability of beef patties packaged in modified atmosphere AB - This research was aimed at evaluating the inhibition of oxidative changes of beef patties packaged in modified atmosphere (70% O-2 + 20% CO2 + 10% N-2) by natural antioxidants: ascorbic acid (500 ppm), taurine (50 mM), carnosine (50 mM), rosemary powder (1000 ppm) and their combinations with the first. Beef patties stored at 2 +/- 1 degreesC for 20 days were evaluated for colour (L*, a*, b*, C* and H*), TBARS, metmyoglobin formation (% of total myoglobin), psychrotrophic microbial counts and sensory odour and discolouration. Rosemary, either alone or with ascorbic acid, was highly effective in inhibiting both metmyoglobin formation and lipid oxidation; sensory analysis was in agreement with these results. Ascorbic acid, ascorbic acid + taurine and ascorbic acid + carnosine treatments showed a limited inhibitory effect of myoglobin oxidation, while carnosine and carnosine + ascorbic acid were effective in inhibiting lipid oxidation. Taurine alone failed to exert any antioxidant effect. Principal components analysis confirmed these results. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Sonora MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 38 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0309-1740 UR - ISI:000169364000013 L2 - natural antioxidants;lipid oxidation;colour stability;beef patties;ascorbic acid;carnosine;taurine;rosemary;meat;GROUND-BEEF; OXIDATIVE STABILITY; CARBON-DIOXIDE; DISPLAY LIFE; MEAT; ANTIOXIDANTS; IMPROVEMENT; OLEORESIN; MYOGLOBIN; QUALITY SO - Meat Science 2001 ;58(4):421-429 4210 UI - 13596 AU - Sanchez-Galeana CA AU - Smith RJ AU - Rodriguez X AU - Montes M AU - Chayet AS AD - CODET, Aris Vis Inst, Zona Rio Tijuana 22320, BC, MexicoBeverly Hills Vis & Laser Inst, Beverly Hills, CA, USAChayet, AS, CODET, Aris Vis Inst, Ave Padre Kino 10159, Zona Rio Tijuana 22320, BC, Mexico TI - Laser in situ keratomileusis and photorefractive keratectomy for residual refractive error after phakic intraocular lens implantation AB - PURPOSE: To determine the visual and refractive outcome of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) in eyes with prior posterior chamber phakic intraocular lens implantation for high myopia. METHODS: We studied a series of 37 consecutive eyes of 31 patients who underwent LASIK or PRK for residual refractive error following collamer posterior chamber intraocular lens (IOL) (Staar Surgical Implantable Contact Lens) implantation into a phakic eye. Twenty-eight eyes had LASIK and nine eyes had PRK. Mean follow-up was 8.1 +/- 4.7 months after laser ablation (range, 3 to 18 mo). RESULTS: The preoperative mean spherical equivalent refraction prior to phakic posterior chamber IOL implantation was -17.74 +/- 4.89 D (range, -9.75 to -28.00 D), Following phakic IOL implantation and prior to LASIK or PRK, mean spherical equivalent refraction was -2.56 +/- 2.34 D (range, -0.25 to -8.75 D). One month following LASIK or PRK, mean spherical equivalent refraction was -0.24 +/- 0.52 D (range, -1.50 to +1.50 D), 3 months following LASIK or PRK, mean spherical equivalent refraction was -0.19 +/- 0.50 D (range, -1.50 to +1.00 D). The refraction was within +/-1.00 D of emmetropia in 36 eyes (97.2%) and within +/-0.50 D in 31 eyes (83.7%), Three eyes developed anterior subcapsular opacities several weeks after laser ablation, one eye developed macular hemorrhage 4 weeks after laser ablation, and one eye had corticosteroid induced ocular hypertension. CONCLUSIONS: LASIK or PRK can be used to treat the residual refractive error following posterior chamber phakic IOL implantation MH - Mexico|Baja California MH - USA PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 12 U4 - Ophthalmology;Surgery U5 - J;Article AV - English IS - 1081-597X UR - ISI:000169009300005 L2 - COMPOUND MYOPIC ASTIGMATISM; CORRECT HIGH MYOPIA; DIOPTERS SO - Journal of Refractive Surgery 2001 ;17(3):299-304 4211 UI - 13103 AU - Sanchez-Gil JA AU - Garcia-Ramos JV AU - Mendez ER AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoSanchez-Gil, JA, CSIC, Inst Estructura Mat, Serrano 121, E-28006 Madrid, Spain TI - Influence of nanoscale cutoff in random self-affine fractal silver surfaces on the excitation of localized optical modes AB - We report rigorous numerical calculations of the near field scattered from rough, one-dimensional self-affine fractal silver surfaces. We show that fractal lower-scale cutoff (decreased to the order of tens of nanometers) has a strong effect on excitation and strength of localized optical modes, leading to very large enhancements of the intensity (larger than 10(4)) and fluctuations of the electric field. (C) 2001 Optical Society of America MH - Mexico|Baja California MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000170411500026 L2 - ENHANCED RAMAN-SCATTERING; ROUGH METAL-SURFACE; 2ND-HARMONIC GENERATION; FIELD ENHANCEMENTS; COLLOID CLUSTERS; WAVE SCATTERING; LIGHT; SPECTROSCOPY; MICROSCOPY SO - Optics Letters 2001 ;26(16):1286-1288 4212 UI - 11767 AU - Sanchez-Gonzales S AU - Ruiz-Campos G AU - Contreras-Balderas S AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoBioconservac AC, Neuvo Leon, MexicoRuiz-Campos, G, PMB 064,POB 189003, Coronado, CA 92178, USA TI - Feeding ecology and habitat of the threespine stickleback, Gasterosteus aculeatus microcephalus, in a remnant population of northwestern Baja California, Mexico AB - The feeding ecology and habitat of the threespine stickleback (Gasterosteus aculeatus microcephalus Girard, 1854) was studied from November 1996 to May 1997 in a remnant population of northwestern Baja California, Mexico. The analysis of the stomach content of 179 individuals (25 to 56 mm standard length [SL]) showed a diet dominated by cyclopoid copepods (43.8%) and chironomid larvae (39.1%). Diet in relation to size and sex of the fish was dominated by copepods in autumn and winter and by chironomid larvae during spring. Diet overlap (Schoener's index) was significant (greater than or equal to60%) between fish size-classes in January, March and April and between sexes for most sampling months. The average size of prey consumed was independent of fish mouth size. The feeding strategy of the threespine stickleback shifted from opportunist in winter to specialist in spring MH - Mexico|Baja California MH - Mexico|Nuevo Leon MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0906-6691 UR - ISI:000173979100001 L2 - COMPETITION; CANADA; DIET; FOOD; LAKE SO - Ecology of Freshwater Fish 2001 ;10(4):191-197 4213 UI - 14284 AU - Sanchez-Marin FJ AU - Srinivas Y AU - Jabri KN AU - Wilson DL AD - Case Western Reserve Univ, Dept Biomed Engn, Cleveland, OH 44106, USAUniv Hosp Cleveland, Dept Radiol, Cleveland, OH 44106, USACase Western Reserve Univ, Cleveland, OH 44106, USASanchez-Marin, FJ, Ctr Invest Opt, Leon 37150, Guanajuato, Mexico TI - Quantitative image quality analysis of a nonlinear spatio-temporal filter AB - Digital temporal and spatial filtering of fluoroscopic image sequences can be used to improve the quality of images acquired at low X-ray exposure. In this study, we characterized a nonlinear edge preserving, spatio-temporal noise reduction filter, the bidirectional multistage (BMS) median filter of Arce [1], To assess image quality, signal detection and discrimination experiments mere performed on stationary targets using a four-alternative forced-choice paradigm, A measure of detectability, d', was obtained for filtered and unfiltered noisy image sequences at different signal amplitudes. Filtering gave statistically significant, average d' improvements of 20% (detection) and 31% (discrimination). A nonprewhitening detection model modified to include the human spatio-temporal visual system contrast-sensitivity underestimated enhancement, predicting an improvement of 6%, Pixel noise standard deviation, a commonly applied image quality measure, greatly overestimated effectiveness giving 67% improvement in d'. We conclude that human testing is required to evaluate filter effectiveness and that human perception models must be improved to account for the spatio-temporal filtering of image sequences MH - Mexico|Guanajuato MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1057-7149 UR - ISI:000167016400009 L2 - evaluation of image processing;image perception;image sequence filtering;medical imaging;quantitative image quality;X-ray imaging;X-RAY FLUOROSCOPY; VISUAL SIGNAL-DETECTION; MOVING-OBJECTS; NOISE; SEQUENCES; DETECTABILITY; DISCRIMINATION; PERFORMANCE; MOTION; MODEL SO - Ieee Transactions on Image Processing 2001 ;10(2):288-295 4214 UI - 13555 AU - Sanchez-Pena SR AU - Quechulpa-Montalvo F AU - Garcia-Martinez M AD - UAAAN, Dept Parasitol Agr, Saltillo 25315, Coahuila, MexicoSanchez-Pena, SR, Univ Texas, Sch Biol Sci, Expt Sci Bldg, Austin, TX 78712 USA TI - Natural enemies of the apple bud weevil (Coleoptera : Curculionidae), an apple pest in Coahuila, Mexico MH - USA MH - Mexico|Coahuila PB - TIFTON: GEORGIA ENTOMOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0749-8004 UR - ISI:000169119200013 L2 - apple bud weevil;biological control;Curculionidae;entomopathogenic fungi;parasitoid;Pteromalidae;Tachinidae SO - Journal of Entomological Science 2001 ;36(2):211-213 4215 UI - 13662 AU - Sanchez-Perez HJ AU - Flores-Hernandez JA AU - Jansa JM AU - Cayla JA AU - Martin-Mateo M AD - Colegio Frontera Sur, Div Populat & Hlth, San Cristobal De Las Cas 29290, Chiapas, MexicoInst Municipal Salut Publ, Dept Epidemiol, TB Invest Unit, Barcelona, SpainUniv Autonoma Barcelona, Fac Med, E-08193 Barcelona, SpainSanchez-Perez, HJ, Colegio Frontera Sur, Div Populat & Hlth, Carretera Panamer & Perifer Sur,S-N, San Cristobal De Las Cas 29290, Chiapas, Mexico TI - Pulmonary tuberculosis and associated factors in areas of high levels of poverty in Chiapas, Mexico AB - Objectives Methods Results Conclusion To estimate the prevalence of pulmonary tuberculosis (PTB) and factors associated with PTB in areas of high levels of poverty in Chiapas, Mexico. Methods In 1998 active case-finding was carried out among those aged over 14 years who had a cough of greater than or equal to 15 days duration, in a convenience sample of 1894 households in 32 communities selected at random based on the level of poverty and on the level of access to health services, measured by travelling time (<1 hour, greater than or equal to1 hour) from the community to the nearest health care unit. Of the 277 identified with a productive cough, we obtained sputum samples from 228 for the purposes of detecting PTB through acid-fast smears and cultures. Mycobacteria characterization was carried out using the BACTEC method. The identification of factors associated with PTB was performed using bivariate analysis and via logistic regression models. Resutls A PTB rate of 276.9 per 100 000 persons aged greater than or equal to 15 years was found (95% CI : 161-443). Blood in sputum was the only factor associated with PTB (none of the demographic or socioeconomic characteristics were). Of 16 positive cultures, 14 became contaminated, The two cultures characterized were Mycobacterium tuberculosis (one being multiresistant). Conclusion The high prevalence of PTB detected indicates the need, both in the area studied and in others with similar conditions, to develop PTB control programmes which give priority to early diagnosis and to the provision of adequate treatment MH - Mexico|Chiapas MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 11 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0300-5771 UR - ISI:000168789500035 L2 - pulmonary tuberculosis;Mexico;risk factors;diagnosis;poverty;ACCESS; CARE; PREVALENCE; HEALTH SO - International Journal of Epidemiology 2001 ;30(2):386-393 4216 UI - 13186 AU - Sanchez-Rodriguez I AU - Huerta-Diaz MA AU - Choumiline E AU - Holguin-Quinones O AU - Zertuche-Gonzalez JA AD - IPN, CICIMAR, Ctr Interdisciplinario Ciencias Marinas, La Paz, BCS, MexicoInst Invest Oceanol, Coronado, CA 92178, USAInst Invest Oceanol, Ensenada 22830, Baja California, MexicoHuerta-Diaz, MA, Inst Invest Oceanol, PMB-133,POB 189003, Coronado, CA 92178 USA TI - Elemental concentrations in different species of seaweeds from Loreto Bay, Baja California Sur, Mexico: implications for the geochemical control of metals in algal tissue AB - Concentration levels of 21 elements were analyzed by instrumental neutron activation analysis (Rb, Cs, Ca, Sr, Ba, Sc, Cr, Fe, Co, Ni, Zn, Se, As, Sb, Th, U, Br, Hf, Ta, Zr, and Ag) in seven different seaweed species (Codium cuneatum, Sargassum sinicola, Padina durvillaei, Laurencia johnstonii, L. papillosa, Gracilaria pachidermatica and Hypnea pannosa), collected in a shallow coastal zone from Bahia de Loreto, Baja California Sur, Mexico. Measured concentrations in algal tissue spanned almost eight orders of magnitude (from 2.0 x 10(-3) mug g(-1) for Hf to 1.2 x 10(5) mug g(-1) for Ca). Ca was consistently the most abundant element in all analyzed seaweeds, followed by Fe and Sr. Brown algae showed a tendency to incorporate higher concentrations of elements than red and green algae. Additionally, there were significant linear correlations (P < 0.05 to P < 0.001) between a total of 76 different pairs of elements, some of them (e.g. Rb-Ni, Rb-Ag, Sc-Cr, Sc-Fe, Sc-Ni, Sc-Hf, Cr-Fe, Fe-Ni, Fe-Hf and Ni-Th) highly correlated (r(2) > 0.900). A significant correlation (r(2) = 0.701, n = 18, P < 0.001) exists between our measurements in the tissue of algae and their corresponding average elemental concentrations in oceanic water from the North Pacific Ocean. Hence, overall elemental abundance in algal tissue apparently is controlled by the elemental abundance in oceanic water, whereas metabolic processes as well as environmental factors relevant to each region modify the final concentration of a given element in the body or a macroalgae. (C) 2001 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Baja California Sur PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 17 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000170127700001 L2 - Mexico;Baja California Sur;Bahia de Loreto;algae;metals;neutron activation analysis;ZOSTERA-MARINA L; BLACK-SEA COAST; FUCUS-VESICULOSUS; HEAVY-METALS; BROWN SEAWEED; TRACE-METALS; SEASONAL-VARIATION; THERMAIKOS GULF; MYTILUS-EDULIS; COMMON MUSSEL SO - Environmental Pollution 2001 ;114(2):145-160 4217 UI - 13809 AU - Sanchez-Rodriquez J AU - Zugasti-Cruz A AU - Burnett JW AD - Univ Nacl Autonoma Mexico, Ins Cienias Mat Limnol, Cancun, MexicoUniv Maryland, Sch Med, Dept Dermatol, Baltimore, MD 20742, USASanchez-Rodriquez, J, Univ Nacl Autonoma Mexico, Ins Cienias Mat Limnol, Cancun, Mexico TI - Cutaneous stings from Bartholomea annulata MH - Mexico|Quintana Roo MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Allergy;Dermatology U5 - J;Article AV - English IS - 0105-1873 UR - ISI:000168373700017 L2 - Bartholomea;sea anemone;Anthozoa;Cnidaria;sting;marine organisms SO - Contact Dermatitis 2001 ;44(5):314-315 4218 UI - 14042 AU - Sanchez-Salcedo FJ AU - Brandenburg A AD - Univ Newcastle, Dept Math, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandNORDITA, DK-2100 Copenhagen O, DenmarkSanchez-Salcedo, FJ, Univ Nacl Autonoma Mexico, Ap 70 264, Mexico City 04510, DF, Mexico TI - Dynamical friction of bodies orbiting in a gaseous sphere AB - The dynamical friction experienced by a body moving in a gaseous medium is different from the friction in the case of a collisionless stellar system. Here we consider the orbital evolution of a gravitational perturber inside a gaseous sphere using three-dimensional simulations, ignoring however self-gravity. The results are analysed in terms of a 'local' formula with the associated Coulomb logarithm taken as a free parameter. For forced circular orbits, the asymptotic value of the component of the drag force in the direction of the velocity is a slowly varying function of the Mach number in the range 1.0-1.6. The dynamical friction time-scale for free decay orbits is typically only half as long as in the case of a collisionless background, which is in agreement with E. C. Ostriker's recent analytic result. The orbital decay rate is rather insensitive to the past history of the perturber. It is shown that, similarly to the case of stellar systems, orbits are not subject to any significant circularization. However, the dynamical friction time-scales are found to increase with increasing orbital eccentricity for the Plummer model, whilst no strong dependence on the initial eccentricity is found for the isothermal sphere MH - Denmark MH - Mexico|Distrito Federal MH - United Kingdom PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000167630100009 L2 - hydrodynamics;waves;galaxies : clusters : general galaxies : kinematics and dynamics;galaxies : star clusters;INTERNAL GRAVITY-WAVES; CLUSTER COOLING FLOWS; DOUBLE CORE EVOLUTION; BARYONIC DARK-MATTER; ACCRETION FLOW; COLD GAS; GALAXY; HALOS; CLOUDS; DECAY SO - Monthly Notices of the Royal Astronomical Society 2001 ;322(1):67-78 4219 UI - 13373 AU - Sanchez-Sesma FJ AU - Madariaga R AU - Irikura K AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoEcole Normale Super, Geol Lab, F-75231 Paris 05, FranceKyoto Univ, Disaster Prevent Res Inst, Uji, Kyoto 611, JapanSanchez-Sesma, FJ, Univ Nacl Autonoma Mexico, Inst Ingn, Cd Univ,Apdo 70-472, Mexico City 04510, DF, Mexico TI - An approximate elastic two-dimensional Green's function for a constant-gradient medium AB - Approximate analytical formulae for elastic 2-D Green's functions for a constant-gradient propagation velocity medium are presented. These solutions correspond to unit line forces per unit length: the antiplane SH line source and the in-plane P-SV line sources, respectively. They are based on the asymptotic ray theory and account for both near-source effects and low frequencies. The analytical expressions obtained are tested by means of the pseudospectral method with a velocity-stress staggered grid. The agreement of the approximate analytical displacement and stress fields with their numerical counterparts is generally very good. A measure of relative error is proposed MH - France MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000169565900018 L2 - body waves;elastic wave theory;Green's functions;ray theory;seismology strong ground motion;BOUNDARY-ELEMENT METHOD; GENERAL INHOMOGENEOUS-MEDIA; 1994 NORTHRIDGE EARTHQUAKE; SANTA-CLARA VALLEY; LOS-ANGELES BASIN; RAYLEIGH-WAVES; 3-DIMENSIONAL SIMULATION; SEISMIC RESPONSE; ALLUVIAL VALLEYS; ANDREAS FAULT SO - Geophysical Journal International 2001 ;146(1):237-248 4220 UI - 13937 AU - Sanchez-Villegas A AU - Madrigal H AU - Martinez-Gonzalez MA AU - Kearney J AU - Gibney MJ AU - de Irala J AU - Martinez JA AD - Univ Navarra, Unidad Epidemiol & Salud Publ, Dept Epidemiol & Salud Publ, Pamplona 31008, SpainUniv Navarra, Dept Fisiol & Nutr, Pamplona 31008, SpainInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoTrinity Coll, Inst European Food Studies, Dublin 2, IrelandMartinez-Gonzalez, MA, Univ Navarra, Unidad Epidemiol & Salud Publ, Dept Epidemiol & Salud Publ, Irunlarrea 1, Pamplona 31008, Spain TI - Perception of body image as indicator of weight status in the European Union AB - Objective To identify the factors associated with an adequate perception of body image in relation to body weight. Material and methods An observational, cross-sectional study was conducted in a representative sample of the European Union (7155 men and 8077 women). Body Mass Index (BMI) was grouped into four categories, perceived body image was assessed using the nine silhouettes drawing: scheme. A multivariable logistic regression model for each sex: was used to adjust for potentially confounding variables. Results Underweight men and women classified themselves better than other groups (92.9% of correct answers among men and 79.3% among women). Overall, women classified themselves better than men (57.6% vs. 32.7%). Discussion Perceived body image as a method of assessment for body weight has different validity depending on sociodemographic or attitudinal categories. Perceived body image as an estimate of the nutritional status has a limited individualized application. Thus, perhaps it could be applied as a proxy measure of adiposity among slim males and among slim and overweight females, but not among the other groups MH - Ireland MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0952-3871 UR - ISI:000167997100003 L2 - body image;European Union;weight status;SEX-DIFFERENCES; SELF-ESTEEM; LIFE-STYLE; WOMEN; HEALTH; DISSATISFACTION; OBESITY; SCALE; SIZE; VALIDATION SO - Journal of Human Nutrition and Dietetics 2001 ;14(2):93-102 4221 UI - 13576 AU - Sanchez A AU - Pascual C AU - Sanchez A AU - Vargas-Albores F AU - Le Moullac G AU - Rosas C AD - UNAM, Fac Ciencias, Grp Biol Marina Expt, Campeche, MexicoCtr Invest Alimentac & Desarrollo, Sonora 83000, MexicoCtr Oceanol Pacifique, Aquacop, IFREMER, Taravao, Tahiti, Fr PolynesiaRosas, C, UNAM, Fac Ciencias, Grp Biol Marina Expt, Apdo Post 69, Campeche, Mexico TI - Hemolymph metabolic variables and immune response in Litopenaeus setiferus adult males: the effect of acclimation AB - Massive nauplii production in Litopenaeus setiferus by means of natural matings has not been reported. The main reason is the low spermatophore attachment rate that has been associated with male sterilization because of male reproductive tract degenerative and the male reproductive melanization syndromes (MRTDS and MRMS). This information indicated both syndromes could be related to the captivity and management stress that affects the immune system and the physiological state of shrimp. We used some blood metabolic variables, sperm quality, and immune response as indicators of captivity stress in adult males of L. setiferus. A comparison between freshly captured shrimp with shrimp maintained in the laboratory for 7 days at two temperatures were examined. Glucose and calcium were not different between fresh and acclimated shrimp at either temperature (P > 0.05). A reduction in triacylglycerol, proteins, and cholesterol was observed in acclimated shrimp in comparison with base line shrimp (P < 0.05). Lactate was reduced only in shrimp acclimated at the lower temperature. Sperm quality was not significantly different between base line samples and acclimated shrimp. The immune system was altered in acclimated shrimp at both temperatures. A reduction in total haemocytes, granular cells, and semigranullar cells was measured in acclimated shrimp in comparison with base-line shrimp. In contrast, a higher phenoloxidase activity (proPO) was observed in acclimated shrimp, indicating that regulatory mechanisms of immune system of those shrimp were altered by captivity conditions. The blood metabolic variables indicated that captive shrimp were affected nutritionally more than physiologically. The immune response showed the nutritional effect or another management factor reduced the cellular defenses and altered the molecular mechanisms associated with melanin production. This could be related to the melanization syndrome observed in previous studies. A new sequence to explain the appearance of the male reproductive shrimp syndromes of L. setiferus was proposed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Fr Polynesia MH - Mexico|Campeche MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000169090900002 L2 - hemolymph;Litopenaeus setiferus;acclimation;PROPHENOLOXIDASE ACTIVATING SYSTEM; SHRIMP PENAEUS-STYLIROSTRIS; OSMOREGULATORY CAPACITY; PROTEIN-LEVELS; MOLT STAGE; VANNAMEI; MONODON; JAPONICUS; WATER; SPERMATOPHORES SO - Aquaculture 2001 ;198(1-2):13-28 4222 UI - 13479 AU - Sanchez AR AU - Elguezabal AA AU - Saenz LD AD - CIMAV, Dept Catalisis, Ctr Invest & Mat Avanzados, Chihuahua 33109, Chihuahua, MexicoCIPIMM, Havana, CubaSanchez, AR, CIMAV, Dept Catalisis, Ctr Invest & Mat Avanzados, Miguel Cervantes 120 Complejo Ind, Chihuahua 33109, Chihuahua, Mexico TI - CO2 activation of char from Quercus agrifolia wood waste AB - Three series of activated carbons were prepared from Quercus agrifolia wood using a two-step process, carbonization followed by physical activation with CO2. Samples were characterized by N-2 and CO2 adsorption. Three activation temperatures were used, 800, 840 and 880 degreesC, covering the 18-85 wt.% yield range by variation of residence time. Activated carbons with a well-developed porous structure, predominantly microporous with high BET surface areas, were obtained. No direct relationship was found between exposed BET surface area (the surface where activation reaction takes place), evolution and gasification rate variation. Porosity development appears to be strongly influenced by the kinetic reaction stage, the reactant gas concentration gradient being an ultimate factor that induces porosity evolution. (C) 2001 Elsevier Science Ltd. Ail rights reserved MH - Cuba MH - Mexico|Chihuahua PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000169368200009 L2 - activated carbon;porosity;CARBONS; STONES; POROSITY; STEAM SO - Carbon 2001 ;39(9):1367-1377 4223 UI - 13072 AU - Sanchez D AU - Labarca P AU - Darszon A AD - UNAM, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62250, Morelos, MexicoCtr Estudios Cient, Valdivia, ChileDarszon, A, UNAM, Inst Biotecnol, Dept Genet & Fisiol Mol, Apdo 510-3, Cuernavaca 62250, Morelos, Mexico TI - Sea urchin sperm cation-selective channels directly modulated by cAMP AB - Components of the sea urchin outer egg jelly layer such as speract drastically change second messenger levels and membrane permeability in sperm. Ion channels are deeply involved in the sperm-egg dialogue in sea urchin and other species. Yet, due to the small size of sperm, studies of ion channels and their modulation by second messengers in sperm are scarce. In this report we offer the first direct evidence that cation-selective channels upwardly regulated by cAMP operate in sea urchin sperm. Due to their poor selectivity among monovalent cations, channel activation in seawater could contribute to sperm membrane repolarization during the speract response. (C) 2001 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies MH - Chile MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000170509300022 L2 - speract;cAMP;hyperpolarization-activated cyclic nucleotide-gated channel;sperm;sea urchin;EGG PEPTIDE SPERACT; ION CHANNELS; ACTIVATION; MEMBRANE; IDENTIFICATION; PURIFICATION; SPERMATOZOA; RECEPTOR; CGMP SO - Febs Letters 2001 ;503(1):111-115 4224 UI - 12019 AU - Sanchez E AU - Uribe RM AU - Corkidi G AU - Zoeller RT AU - Cisneros M AU - Zacarias M AU - Morales-Chapa C AU - Charli JL AU - Joseph-Bravo P AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62271, Morelos, MexicoUniv Massachusetts, Morril Sci Ctr, Amherst, MA 01003, USAJoseph-Bravo, P, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, AP 510-3, Cuernavaca 62271, Morelos, Mexico TI - Differential responses of thyrotropin-releasing hormone (TRH) neurons to cold exposure or suckling indicate functional heterogeneity of the TRH system in the paraventricular nucleus of the rat hypothalamus AB - Thyrotropin-releasing hormone (TRH) is released from the median eminence upon neural stimulation such as cold or suckling exposure. Concomitant with the cold- or suckling-induced release of TRH is a rapid and transient increase in the expression of proTRH mRNA in the paraventricular nucleus (PVN) of the hypothalamus. We employed two strategies to determine whether TRH neurons responding to cold exposure are different from those responding to suckling. First, we attempted to identify a marker of cellular activation in TRH neurons of the PVN. Cold induced c-fos expression in about 25% of TRH neurons of the PVN, but no induction was observed by suckling. Moreover, we explored the expression of a variety of immediate early genes including NGFI-A, fra-1 and c-jun, or CREB phosphorylation but found none to be induced by suckling. The number of cells expressing high levels of proTRH mRNA was counted and compared to total expressing cells. An increased number of cells expressing high levels of proTRH mRNA was observed when both stimuli were applied to the same animal, suggesting that different cells respond separately to each stimulus. We therefore analyzed the distribution of responsive TRH neurons as defined by the cellular level of proTRH mRNA. The proTRH mRNA signal was analyzed within three rostrocaudal zones of the PVN and within six mediolateral columns. Results showed that in response to cold, all areas of the PVN of the lactating rat present increased proTRH mRNA levels, including the anterior zone where few hypophysiotropic TRHergic cells are believed to reside. The distribution of the proTRH mRNA expressing cells in response to cold was quite comparable in female and in male rats. In contrast, the response after suckling was confined to the middle and caudal zones. Our results provide evidence of a functional specialization of TRH cells in the PVN. Copyright (C) 2001 S. Karger AG, Basel MH - Mexico|Morelos MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 21 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0028-3835 UR - ISI:000173112500006 L2 - thyrotropin-releasing hormone;TRH mRNA;cold stress;suckling;paraventricular nucleus;in situ hybridization;c-fos;MESSENGER-RIBONUCLEIC-ACID; FASTING-INDUCED SUPPRESSION; MEDIAN-EMINENCE; ADRENOCORTICAL SYSTEM; GENE-EXPRESSION; LACTATION; PITUITARY; RNA; PROLACTIN; STRESS SO - Neuroendocrinology 2001 ;74(6):407-422 4225 UI - 13415 AU - Sanchez E AU - Soto JM AU - Uvalle JX AU - Hernandez AP AU - Ruiz JM AU - Romero L AD - Univ Granada, Fac Ciencias, Dept Biol Vegetal, E-18071 Granada, SpainUniv Autonoma Chihuahua, Fac Ciencias Agrotecnol, Chihuahua 31150, MexicoSanchez, E, Univ Granada, Fac Ciencias, Dept Biol Vegetal, E-18071 Granada, Spain TI - Chemical treatments in "Golden Delicious Spur" fruits in relation to russeting and nutritional status AB - The impact of chemical products on mineral nutritional status and russeting in 'Golden Delicious Spur' was studied. In addition, we sought to define the nutrients responsible for russeting in order to avoid imbalances in their concentrations in the fruit. Lime-sulphur (lime and sulphur, T1), ProVide (gibberellic acid GA(4+7), T2), calcium nitrate (8.5% N and 11.5% Ca, T3), Microthiol Special (micronized wettable sulphur at 80%, T4), Packhard (8% Ca, 6% carboxylic acid, 0.5%B, T5), and Dithane (ethylene-bis dithiocarbamate of manganese 62%, Mn 16% and Zn 2%, T6) were applied to apple trees at the onset of flowering, at petal drop, and at the onset of fruit development. The ProVide and Microthiol treatments reduced the damaged fruit area and the percentage of damaged fruits in comparison to control (trees without application, T0). The application of calcium nitrate and Dithane increased the percentage of damaged area in relation to control, whereas the use of Packhard increased the percentage of fruits with russeting. In conclusion, our results indicate that russeting is more influenced by the formulation of the chemical products than by the nutrient content in the fruits, although we found a highly significant reduction and inversely proportional relationship between the Mn concentrations and the appearance of russeting MH - Mexico|Chihuahua MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000169440400014 L2 - APPLE; SET; GIBBERELLINS; DAMINOZIDE; QUALITY; GA4+7 SO - Journal of Plant Nutrition 2001 ;24(1):191-202 4226 UI - 13675 AU - Sanchez E AU - Angell CA AU - Torres-Martinez M AD - Arizona State Univ, Dept Chem, Tempe, AZ 85287, USAUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey 64140, NL, MexicoSanchez, E, Arizona State Univ, Dept Chem, Tempe, AZ 85287, USA TI - Preparation and electrical properties of lithium mix-ion conductors based on oxi-glass systems AB - A system based on the xLi(2)O-(1-x)[30V(2)O(5),-70TeO(2)] glassy system have been prepared by classical melt-quenching technique and their thermal and electrical properties were studied in the range from x = 0 up to 0.4. It has been observed on these glasses that with increase of Li2O concentration T-g decreases as well conductivity, however when x reaches 0.2-0.3 values conductivity begin to increase(T-g behavior remains unaltered). Results have been discussed on the basis of network modification that would occur in the glass base structure by the addition of Li2O. Those glasses show high promise as potential mixed-ionic materials MH - Mexico|Nuevo Leon MH - USA PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000168650000007 L2 - Li2O;V2O5;TeO2;optical basicity;mixed conduction;TELLURITE GLASSES; CONDUCTIVITY SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2001 ;40(2):125-129 4227 UI - 13524 AU - Sanchez EN AU - Perez JP AU - Chen GR AD - Univ Guadalajara, CINVESTAV, Guadalajara 45081, Jalisco, MexicoCity Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R ChinaSanchez, EN, Univ Guadalajara, CINVESTAV, Apartado Postal 31-430,Plaza Luna, Guadalajara 45081, Jalisco, Mexico TI - Using dynamic neural networks to generate chaos: An inverse optimal control approach AB - This Letter suggests a new approach to generating chaos via dynamic neural networks. This approach is based on a recently introduced methodology of inverse optimal control for nonlinear systems. Both Chen's chaotic system and Chua's circuit are used as examples for demonstration. The control law is derived to force a dynamic neural network to reproduce the intended chaotic attractors. Computer simulations are included for illustration and verification MH - Mexico|Jalisco MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 10 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000169149200016 SO - International Journal of Bifurcation and Chaos 2001 ;11(3):857-863 4228 UI - 12537 AU - Sanchez JA AU - Garcia MC AU - Sharma VK AU - Young KC AU - Matlib MA AU - Sheu SS AD - Univ Rochester, Sch Med & Dent, Dept Physiol & Pharmacol, Rochester, NY 14642, USACINVESTAV, Dept Pharmacol, Mexico City, DF, MexicoUniv Cincinnati, Coll Med, Dept Pharmacol & Cell Biophys, Cincinnati, OH 45267, USASheu, SS, Univ Rochester, Sch Med & Dent, Dept Physiol & Pharmacol, 601 Elmwood Ave,Box 711, Rochester, NY 14642 USA TI - Mitochondria regulate inactivation of L-type Ca2+ channels in rat heart AB - 1. L-type Ca2+ channels play an important role in vital cell functions such as muscle contraction and hormone secretion. Both a voltage-dependent and a Ca2+-dependent process inactivate these channels. Here we present evidence that inhibition of the mitochondrial Ca2+ import mechanism in rat (Sprague-Dawley) ventricular myocytes by ruthenium red (RR), by RON or by carbonyl cyanide m-chlorophenylhydrazone (CCCP) decreases the magnitude of electrically evoked transient elevations of cytosolic Ca2+ concentration ([Ca2+](c)). These agents were most effective at stimulus rates greater than 1 Hz. 2. RR and CCCP also caused a significant delay in the recovery from inactivation of L-type Ca2+ currents (I-Ca). This suggests that sequestration of cytosolic Ca2+, probably near the, mouth of L-type Ca2+ channels, into mitochondria. during cardiac contractile cycles, helps to remove the Ca2+-dependent inactivation of L-type Ca2+ channels. 3. We conclude that impairment of mitochondrial Ca2+ transport has no impact on either L-type Ca2+ currents or SR Ca2+ release at low stimulation frequencies (e.g. 0.1 Hz); however, it causes a depression of cytosolic: Ca2+ transients attributable to an impaired recovery of L-type Ca2+ currents from inactivation at high stimulation frequencies (e.g. 3 Hz). The impairment of mitochondrial Ca2+ uptake and subsequent effects on Ca2+ transients at high frequencies at room temperature could be physiologically relevant since the normal heart rate of rat is around 5 Hz at body temperature. The role of mitochondria in clearing Ca2+ in the micro-domain near L-type Ca2+ channels could be impaired during high frequencies of heart beats such as in ventricular tachycardia, explaining, at least in part, the reduction of muscle contractility MH - Mexico|Distrito Federal MH - USA PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 17 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000171807700006 L2 - SARCOPLASMIC-RETICULUM; CARDIAC MYOCYTES; VENTRICULAR MYOCYTES; RUTHENIUM RED; PYRUVATE-DEHYDROGENASE; CALCIUM-TRANSPORT; RELEASE; CELLS; OSCILLATIONS; MICRODOMAINS SO - Journal of Physiology-London 2001 ;536(2):387-396 4229 UI - 12891 AU - Sanchez LA AU - Knochenhauer ES AU - Gatlin R AU - Moran C AU - Azziz R AD - Inst Seguro Sociales Mexico, Mexico City, DF, MexicoUniv Alabama, Birmingham, AL, USA TI - Differential diagnosis of clinically evident hyperandrogenism: experience with over 1000 consecutive patients MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000170863900295 SO - Fertility and Sterility 2001 ;76(3):S111-S111 4230 UI - 12488 AU - Sanchez M AU - Gonzalez JC AU - Diaz P AU - Pena-Sierra R AU - Escobosa A AD - Univ La Habana, Fac Fis, Havana 10400, CubaCINVESTAV, IPN, Dept Ingn Elect, Secc Elect Estado Solido, Mexico City 0700, DF, MexicoSanchez, M, Univ La Habana, Fac Fis, San Lazaro & L,Vedado, Havana 10400, Cuba TI - About kinks in AlGaAs lasers light-current characteristic AB - The origin of the kinks in semiconductor lasers light-current characteristic (L(I))is theoretically and experimentally analyzed. The devices are straight separate confinement heterostructure lasers. We have developed a model to calculate L(I) which considers two thermal loss mechanisms: the leakage current and Auger recombination. It is shown that the kinks in the light-current characteristic appear at temperatures at which the considered mechanisms crossover MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900029 L2 - TEMPERATURE SO - Modern Physics Letters B 2001 ;15(17-19):688-691 4231 UI - 12198 AU - Sanchez NA AU - Saniger JM AU - de la Caillerie JBD AU - Blumenfeld AL AU - Fripiat JJ AD - Univ Nacl Autonoma Mexico, Ctr Instrumentos, Lab Mat & Sensores, Mexico City 04510, DF, MexicoEcole Super Phys & Chim Ind Ville Paris, FRE CNRS 2312, Phys Quant Lab, F-75231 Paris 05, FranceUniv Idaho, Moscow, ID 83843, USASaniger, JM, Univ Nacl Autonoma Mexico, Ctr Instrumentos, Lab Mat & Sensores, Circuito Exterior Cd Univ Apdo Postal 70-186, Mexico City 04510, DF, Mexico TI - Dealumination and surface fluorination of H-ZSM-5 by molecular fluorine AB - At room temperature, framework aluminum (FAl) is extracted rapidly from the lattice of H-ZMS-5 by molecular fluorine. Ionic fluoro-complexes containing octahedral aluminum are formed within the micropores of the zeolite. The structure remains intact while the Si/FAl increases, for instance from 27 to 233 or from 55.2 to 382. As shown previously, the behavior of HY with respect to molecular fluorine is similar. The terminal SiOH in H-ZSM-5 are also fluorinated. The extent of this reaction was negligible in the case of HY. The quantitative distinction between the fluorine atom in SiF and the aluminum fluoro-complexes is possible using F-19 MAS NMR, HETCOR and TRAPDOR. The good agreement between Al-27 and F-19 NMR data and the quantitative analysis of the infrared spectra in the OH stretching region is outlined. In particular, the disputed assignment of the 3700 cm(-1) band to OH on non-framework aluminum moieties is elucidated. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000172607400005 L2 - zeolite;dealumination;fluorination;Al-27 and F-19 NMR;BRONSTED ACID SITES; AQUEOUS-SOLUTION; NMR; ZEOLITES; ALUMINUM; MORDENITES; COMPLEXES; ZSM-5; HY SO - Microporous and Mesoporous Materials 2001 ;50(1):41-52 4232 UI - 13368 AU - Sanchez NA AU - Saniger JM AU - de la Caillerie JBD AU - Blumenfeld AL AU - Fripiat JJ AD - UNAM, Ctr Instrumentos, Lab Mat & Sensores, Mexico City 04510, DF, MexicoEcole Super Phys & Chim Ind, CNRS, ESA 7069, Phys Quant Lab, F-75231 Paris 05, FranceUniv Idaho, Dept Chem, Moscow, ID 83844, USASaniger, JM, UNAM, Ctr Instrumentos, Lab Mat & Sensores, Circuito Exterior Cd Univ,AP 70-186, Mexico City 04510, DF, Mexico TI - Reaction of HY zeolite with molecular fluorine AB - At room temperature, gaseous Fi extracts tetrahedrally coordinated aluminum from the lattice of an acid, near-faujasite HY zeolite (Si/Al approximate to 13) and forms fluoro-hydroxy-aluminum complexes of the type Al2F(OH)(n)((5-n)+) in which Al is octahedrally coordinated. Moreover, the crystallinity of the zeolite is almost unchanged by the fluorination process. The HY dehydrated at 200 degreesC under vacuum and treated under a F-2 pressure of 300 mbar at room temperature is practically totally dealuminated. At lower pressure the transformation is partial. The coordination shell of the complex becomes unstable at about 500 degreesC. Upon losing ligands, octahedral Al reverts partially to the tetrahedral coordination and is partially reinserted into the lattice. At a higher temperature an amorphous alumina phase is formed. Al-27 and F-19 high-resolution solid-state NMR, FT-IR, X-ray diffraction, and temperature-programmed desorption (TPD) are the main tools used in this work. (C) 2001 Academic Press MH - France MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000169706300008 L2 - zeolite;dealumination;fluorination;Al-27 and F-19 NMR;LEWIS-ACID SITES; SURFACE ALUMINUM; AQUEOUS-SOLUTION; AL-27 NMR; MORDENITES; COMPLEXES SO - Journal of Catalysis 2001 ;201(1):80-88 4233 UI - 13077 AU - Sanchez NS AU - Pearce DA AU - Cardillo TS AU - Uribe S AU - Sherman F AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biochem, Mexico City 04510, DF, MexicoUniv Rochester, Sch Med & Dent, Dept Biochem & Biophys, Rochester, NY 14642, USAUniv Rochester, Sch Med & Dent, Ctr Aging & Dev Biol, Rochester, NY 14642, USASherman, F, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biochem, Apdo Postal 70-242, Mexico City 04510, DF, Mexico TI - Requirements of Cyc2p and the porin, Por1p, for ionic stability and mitochondrial integrity in Saccharomyces cerevisiae AB - It was previously demonstrated that Cyc2p from Saccharomyces cerevisiae is a mitochondrial protein; that the cyc2-Delta2 deletion lacking the entire gene causes a diminution to only approximately 20% of the normal levels of cytochrome c due to a partial deficiency in mitochondrial import of apo-cytochrome c; that the deletion causes a defective mitochondrial function, as revealed by diminished growth on media containing nonfermentable carbon sources; and that this defect is exacerbated in hyper-ionic KCl media and at higher incubation temperatures, but is suppressed on media containing sorbitol, a nonionic compound. We report that por1-Delta strains lacking the mitochondrial porin, Por1p, but not por2-Delta strains lacking the related porin, share some phenotypes similar to the cyc2-Delta2 strain, including hypersensitivity to KCl in glycerol medium. Moreover, spontaneous swelling in the presence of ATP was detected in mitochondria from the cyc2-Delta2 strain, while swelling could be detected in mitochondria from the other strains only after the addition of KCl. Thus, highly unspecific membrane permeation may be triggered by ATP in the cyc2-Delta2 strain. We suggest that Por1p and Cyc2p, in addition to their own unique functions, serve to maintain the osmotic stability of mitochondria, but by different mechanisms. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0003-9861 UR - ISI:000170495100020 L2 - porin;mitochondria;osmotic stability;cytochrome c;Saccharomyces cerevisiae;Cyc2p;Por1p;PERMEABILITY TRANSITION PORE; YEAST CYTOCHROME-C; HEME LYASE; MEMBRANE; IMPORT; ATP; SEQUENCE; PROTEIN; CHANNEL; DEFICIENT SO - Archives of Biochemistry and Biophysics 2001 ;392(2):326-332 4234 UI - 13242 AU - Sandoval-Coronado CF AU - Luna-Olvera HA AU - revalo-Nino K AU - Jackson MA AU - Poprawski TJ AU - Galan-Wong LJ AD - USDA ARS, Natl Ctr Agr Utilizat Res, Peoria, IL 61604, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, San Nicolas De Los Garza 66450, NL, MexicoTexas A&M Agr Expt Stn, Weslaco, TX 78596, USAUSDA ARS, Beneficial Insects Res Unit, Weslaco, TX 78596, USAJackson, MA, USDA ARS, Natl Ctr Agr Utilizat Res, 1815 N Univ St, Peoria, IL 61604 USA TI - Drying and formulation of blastospores of Paecilomyces fumosoroseus (Hyphomycetes) produced in two different liquid media AB - Formulation matrices can play an important role in improving the storage survival and biocontrol efficacy of microorganisms used for the control of pest insects. In this study, liquid culture-produced blastospores of the entomopathogenic fungus Paecilomyces fumosoroseus were formulated with different inert and organic materials prior to air-drying. Paecilomyces fumosoroseus blastospores were produced in two different liquid media, a basal salts medium supplemented with Casamino acids and glucose (LM1) and a medium containing peptone of collagen and glucose (LM2). Blastospores produced in the two test media were formulated with various supports. The formulation supports were cornstarch, rice flour, talc powders, Mexican lime, calcined kaolin clay, and diatomaceous earth. Several of the supports were tested at different concentrations. The initial and long-term (after storage at 4 and 28 degreesC) survival of the formulated, air-dried blastospores were evaluated. Initial blastospore viabilities were affected by the formulation material and by the blastospore production medium. Medium composition, drying support and storage temperature had an impact on the long-term survival of the blastospores. Under the conditions of the study, LM1 produced higher concentrations of blastospores that not only survived drying better than blastospores produced in LM2 but also maintained viability longer during storage in the formulation supports tested. The nature of the drying supports was shown to have a significant impact on the storage stability of all blastospores, particularly those produced in LM1. Under the production, drying and storage conditions used in the study, calcined kaolin clay formulations stored at 4 degreesC had the best storage stability. In all formulations tested, spore survival over time was reduced for blastospore formulations stored at 28 degreesC rather than 4 degreesC MH - USA MH - Mexico|Nuevo Leon PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000169867400017 L2 - air-drying;blastospores;calcined kaolin clay;desiccation tolerance;formulation;Paecilomyces fumosoroseus;submerged culture;BEAUVERIA-BASSIANA; METARHIZIUM-ANISOPLIAE; CULTURE; TOLERANCE; GROWTH SO - World Journal of Microbiology & Biotechnology 2001 ;17(4):423-428 4235 UI - 12379 AU - Sandoval-Villa M AU - Guertal EA AU - Wood CW AD - Colegio Postgrad, Programa Edafol, Montecillo 56230, Mex, MexicoAuburn Univ, Dept Agron & Soils, Auburn, AL 36849, USASandoval-Villa, M, Colegio Postgrad, Programa Edafol, Montecillo 56230, Mex, Mexico TI - Greenhouse tomato response to low ammonium-nitrogen concentrations and duration of ammonium-nitrogen supply AB - High ammonium-nitrogen (NH4-N) concentration in solution may adversely affect greenhouse tomato (Lycopersicon esculentum Mill.) yield, but it has been reported that small NH4-N fractions improve yield and may increase vegetative growth and nutrient element uptake. The effects of short- or long-term supply of NH4-N to tomato plants is not clear, and further information is required to determine how it can affect fruit yield. The objective of this study was to determine the tomato yield response to 0: 100, 10:90, 20:80, 30:70, and 40:60 NH4-N:NO3-N ratios supplied at the vegetative, vegetative plus flowering, flowering plus fruiting, and fruiting stages, and over the entire plant life cycle. Two experiments under greenhouse conditions were conducted with ambient light in which light intensity was 2,667 and 5,030 Wh(-1) m(-2) for the winter (1996-1997) and the spring (1997) experiments, respectively. In both experiments, neither the length of NH4-N supply nor the NH4-N concentration in solution affected tomato yield. Longer NH4-N supply increased the amount of fruit with blossom-end rot (BER) in the winter (1996-1997) experiment, but BER incidence was unaffected in the spring (1997) experiment by duration of NH4-N supply. The number of fruit with BER was greatly increased by higher NH4-N concentrations in solution in the spring (1997) experiment. Plant height was not affected by NH4-N concentration in either the winter or spring experiments, and neither was fruit firmness measured for fruit at the mature green stage. Fresh and dry weights were unaffected by NH4-N concentration or length of supply, but in the spring (1997) experiment, fresh weight of leaves, as well as their proportion to the weight of the aerial parts, were affected by both NH4-N concentration and length of supply. High concentrations of NH4-N and long periods or NH4-N supply increased calcium (Ca) concentration in leaf tissue, but only for the spring (1997) experiment was there a significant relationship between Ca concentration in leaves and BER incidence MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000172222200008 L2 - ROOT TEMPERATURE; GROWTH; PLANTS; NITRATE SO - Journal of Plant Nutrition 2001 ;24(11):1787-1798 4236 UI - 12594 AU - Sandoval-Villalbazo A AU - Garcia-Perciante AL AU - Colin LSG AD - Univ Iberomericana, Dept Ciencias, Mexico City 01210, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoSandoval-Villalbazo, A, Univ Portsmouth, Portsmouth PO5 3HR, Hants, England TI - Rotational viscosity in linear irreversible thermodynamics and its application to neutron stars AB - A generalized analysis of the local entropy production of a simple fluid is used to show that, if intrinsic angular momentum is taken into account, rotational viscosity must arise in the linear non-equilibrium regime. As a consequence, the stress tensor of dense rotating matter, such as the one present in neutron Stars, posseses a significant non-vanishing antisymmetrical part. A simple argument suggests that, due to the extreme magnetic fields present in neutron stars, the relaxation time associated to rotational viscosity is large (similar to 10(21) s). The formalism leads to generalized Navier-Stokes equations useful in neutron star physics which involve vorticity in the linear regime MH - United Kingdom MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Mechanics U5 - J;Article AV - English IS - 0340-0204 UR - ISI:000171646100006 SO - Journal of Non-Equilibrium Thermodynamics 2001 ;26(3):269-277 4237 UI - 12736 AU - Sandoval J AU - Rothman A AU - Puildo T AD - Inst Nacl Cardiol Ignacio Chavez, Dept Cardiopulmonar, Mexico City 14080, DF, MexicoUniv Calif San Diego, Div Pediat Cardiol, San Diego, CA 92103, USASandoval, J, Inst Nacl Cardiol Ignacio Chavez, Dept Cardiopulmonar, Juan Badiano 1,Colonia Secc XVI, Mexico City 14080, DF, Mexico TI - Atrial septostomy for pulmonary hypertension AB - Atrial septostomy is an additional, palliative, procedure for the treatment of severe primary pulmonary hypertension. Properly performed, it can bring about significant clinical nd hemodynamic beneficial effects. It is currently indicated for patients with failure to maximal medical therapy, as a bridge for transplantation, and when no other therapeutic option exists MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 23 U4 - Respiratory System U5 - J;Article AV - English IS - 0272-5231 UR - ISI:000171324900015 L2 - LUNG TRANSPLANTATION; VASCULAR-DISEASE; SURVIVAL; THERAPY; PATIENT; BRIDGE SO - Clinics in Chest Medicine 2001 ;22(3):547-+ 4238 UI - 12555 AU - Sandoz G AU - Bichet D AU - Cornet V AU - Mori Y AU - Felix R AU - De Waard M AD - Fac Med Nord, INSERM, U464, Inst Federatif Jean Roche, F-13916 Marseille 20, FranceNatl Inst Physiol Sci, Dept Informat Physiol, Aichi 4448585, JapanIPN, Dept Physiol Biophys & Neurosci, CINVESTAV, Mexico City 0700, DF, MexicoDe Waard, M, Fac Med Nord, INSERM, U464, Inst Federatif Jean Roche, Blvd Pierre Dramard, F-13916 Marseille 20, France TI - Distinct properties and differential beta subunit regulation of two C-terminal isoforms of the P/Q-type Ca2+-channel alpha(1A) subunit AB - Two C-terminal splice variants (BI-1 and BI-2, now termed Ca(v)2.1a and Ca(v)2.1b) of the neuronal voltage-gated P/Q-type Ca2+ channel alpha (1A) pore-forming subunit have been cloned (Mori et al., 1991, Nature, 350, 398-402). BI-1 and BI-2 code for proteins of 2273 and 2424 amino acids, respectively, and differ only by their extreme carboxyl-termini sequences. Here, we show that, in Xenopus oocytes, the two isoforms direct the expression of channels with different properties. Electrophysiological analysis showed that BI-1 and BI-2 have peak Ba2+ currents (I-Ba) at a potential of +30 and +20 mV, respectively. The different C-terminal sequence (amino acids 2229-2273) of BI-1 caused a shift in steady-state inactivation by +10 mV and decreased the proportion of fast component of current inactivation twofold. Likewise, the biophysical changes in IBa caused by coexpression of the beta (4) auxiliary subunit were substantially different in BI-1- and BI-2-containing channels in comparison to those induced by beta (3)- Several of these differences in beta regulation were abolished by deleting the carboxyl-terminal splicing region. By creating a series of GST fusion proteins, we identified two locations in the C-terminal (Leu2090-Gly2229 for BI-1 and BI-2, and Arg2230-Pro2424 for BI-2 only) that determine the differential interaction of beta (4) with the distinct alpha (1A) isoforms. These interactions appear to favour the binding of beta (4) to the AID site, and also the plasma membrane expression of BI-2. These results demonstrate that the final segment of the C-terminal affects alpha (1A) channel gating, interaction and regulation with/by the beta subunits. The data will have several implications for the understanding of the biophysical effects of many channelopathies in which the carboxyl-termini of alpha (1A) and beta (4) are affected MH - France MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000171848500009 L2 - alpha(1A) subunit isoforms;beta subunit interaction;P/Q-type Ca2+ channel;DEPENDENT CA2+ CHANNELS; I-II LOOP; CALCIUM-CHANNEL; P-TYPE; ATAXIA; ACTIVATION; EPILEPSY; OOCYTES; BINDS; SITE SO - European Journal of Neuroscience 2001 ;14(6):987-997 4239 UI - 13791 AU - Sanin LH AU - Gonzalez-Cossio T AU - Romieu I AU - Peterson KE AU - Ruiz S AU - Palazuelos E AU - Hernandez-Avila M AU - Hu H AD - Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62508, Morelos, MexicoUniv Autonoma Chihuahua, Mexico City, DF, MexicoPan Amer Hlth Org, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USANatl Autonomous Univ Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, MexicoAmer British Cowdray Hosp, Mexico City, DF, MexicoHarvard Univ, Sch Med, Brigham & Womens Hosp, Dept Med,Channing Lab, Boston, MA, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USAHernandez-Avila, M, Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Effect of maternal lead burden on infant weight and weight gain at one month of age among breastfed infants AB - Introduction. Transfer of lead from bone to the bloodstream increases during lactation. However, the effect of maternal lead burden on growth in breastfed newborns is still unknown. This study examined early postnatal growth in a cohort of healthy breastfed newborns in relation to maternal bone lead burden. Methods. Lead levels were measured among 329 mother-infant pairs in umbilical cord blood at birth and in maternal and infant venous blood at 1 month postpartum. Maternal evaluations at 1 month postpartum included lead measures in blood and bone (measured in the tibia and the patella). Blood lead was determined by graphite furnace atomic absorption spectrophotometry. Bone lead was measured by Cd-109 Kx-radiograph fluorescence instrument. The primary endpoints were attained weight 1 month of age, and weight gain from birth to 1 month of age, which were analyzed in relation to lead biomarkers and relevant covariates by linear regression models. Results. Infants studied had an average weight gain of 33.1 g/day (standard deviation [SD] = 11.6). Mean infant (at 1 month of age) and maternal blood lead levels were 5.6 mug/dL (SD = 3.0) and 9.7 mug/dL (SD = 4.1), respectively. Mean maternal bone lead levels were 10.1 mug of lead/g (SD = 10.3) and 15.29 mug of lead/g (SD = 15.2) of bone mineral for tibia and patella, respectively. Infant blood lead levels were inversely associated with weight gain, with an estimated decline of 15.1 g per mug/dL of blood lead. Children who were exclusively breastfed had significantly higher weight gains; however, this gain decreased significantly with increasing levels of patella lead. The multivariate regression analysis predicted a 3.6-g decrease in weight at 1 month of age per mug of lead per gram bone mineral increase in maternal patella lead levels. Conclusions. Maternal lead burden is negatively associated to infant attained weight at 1 month of age and to postnatal weight gain from birth to 1 month of age. Additional studies are needed to better understand this source of exposure and to develop interventions to minimize its impact MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ELK GROVE VILLAGE: AMER ACAD PEDIATRICS RP - NOT IN FILE U3 - TC 12 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-4005 UR - ISI:000168411100027 L2 - maternal lead burden;infant weight;weight gain;breastfeeding;X-RAY-FLUORESCENCE; BONE-LEAD; BLOOD LEAD; BIRTH-WEIGHT; MEXICO-CITY; PREGNANCY; LACTATION; EXPOSURE; DENSITY; GROWTH SO - Pediatrics 2001 ;107(5):1016-1023 4240 UI - 12094 AU - Sanjuan R AU - Anzaldo J AU - Vargas J AU - Turrado J AU - Patt R AD - Univ Guadalajara, Dept Madera Celulosa & Papel, Mexico City, DF, MexicoUniv Hamburg, Hamburg, GermanySanjuan, R, Univ Guadalajara, Dept Madera Celulosa & Papel, Mexico City, DF, Mexico TI - Morphological and chemical composition of pith and fibers from Mexican sugarcane bagasse AB - This paper tries to enlarge existing knowledge on the morphology and chemical composition of Mexican sugarcane bagasse carrying out a morphological and chemical analysis of the main fractions, fiber bundles and pith, consisting of vessels and parenchyma. The cell dimensions of the two fractions were determined as well as their chemical composition. Morphology as well as chemical composition of the two fractions are different. Average length of fibers was higher than I mm and the ratio fiber length: fiber diameter was the highest of all cell types investigated in this paper. Fibers had a high cell wall thickness which contributes to the stability of these tissue elements. On the other hand, the parenchyma cells were very snort with a fairly high diameter and a thin cell wall. Such structure has a negative impact on the papermaking properties of bagasse. Chemical analysis of the two fractions revealed that ash content and hot water extractives of the pith fraction is much higher than for the fiber bundles MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0018-3768 UR - ISI:000173027100009 L2 - sugarcane bagasse;pith;fiber bundles;morphology;chemical composition;FTIR;HPLC;SPECTROSCOPY SO - Holz Als Roh-und Werkstoff 2001 ;59(6):447-450 4241 UI - 12794 AU - Sanson LZ AD - Eindhoven Univ Technol, Dept Phys, Fluid Dynam Lab, NL-5600 MB Eindhoven, NetherlandsSanson, LZ, CICESE, Dept Phys Oceanog, Ensenada, Baja California, Mexico TI - The asymmetric Ekman decay of cyclonic and anticyclonic vortices AB - Recent studies have shown differences in the behaviour of cyclonic and anticyclonic quasi-two-dimensional vortices in laboratory experiments in a rotating fluid. In this paper, the role of dissipative effects due to bottom topography is investigated as a possible cause for the asymmetry in the spin-down of both types of vortices. The basic mechanism of Ekman friction in 2D mathematical models is the presence of a linear damping term in the vorticity equation, which produces the flow decay. Here, an extended 2D formulation including nonlinear Ekman corrections is considered. The aim is to show that nonlinear Ekman effects are responsible for the different decay of cyclonic and anticyclonic vortices, while the conventional formulation (only containing the linear friction term) predicts a symmetric decay for both cases. In order to illustrate the role of nonlinear Ekman effects, axisymmetric vortices are simulated numerically. The relatively simple structure of such vortices allows a better understanding of their evolution. The main difference in the spin-down process of cyclones and anticyclones is the decay rate, which is faster for cyclonic motion. Furthermore, it is shown that the basic mechanism for such a difference is the outward advection of fluid in cyclones and inward in anticyclones, both effects due to Ekman pumping and suction, respectively. The results derived here intend to provide a physical interpretation which could be applied for more general, non-axisymmetric structures. (C) 2001 Editions scientifiques et medicales Elsevier SAS MH - Mexico|Baja California MH - Netherlands PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0997-7546 UR - ISI:000171230900007 L2 - ROTATING FLUID; BAROTROPIC VORTICES; EVOLUTION SO - European Journal of Mechanics B-Fluids 2001 ;20(4):541-556 4242 UI - 14495 AU - Sanson LZ AU - van Heijst GJF AU - Backx NA AD - Eindhoven Univ Technol, Fluid Dynam Lab, NL-5600 MB Eindhoven, NetherlandsSanson, LZ, CICESE, Dept Phys Oceanog, Km 107,Carretera Tijuana, Ensenada 22800, Baja California, Mexico TI - Ekman decay of a dipolar vortex in a rotating fluid AB - The evolution of quasi-two-dimensional (2D) dipolar vortices over a flat bottom in a rotating fluid system is studied numerically, and the main results are experimentally verified. Our aim is to examine the dipole decay due to bottom friction effects. The numerical simulations are based on the 2D physical model derived by Zavala Sanson and van Heijst [J. Fluid Mech. 412, 75 (2000)], which contains nonlinear Ekman terms, associated with bottom friction, in the vorticity equation. In contrast, the conventional 2D model with bottom friction only retains a linear stretching term in the same equation. It is shown that the dipole trajectory is deflected towards the right (i.e., in the anticyclonic direction) when nonlinear Ekman terms are included. This effect is not observed in simulations based on the conventional model, where the dipole trajectory is a straight line. The basic reason for this behavior is the slower decay of the anticyclonic part of the dipole, with respect to the cyclonic one, due to nonlinear Ekman effects. Another important result is the exchange of fluid between the cyclonic part and the ambient, leaving a tail behind the dipole. By means of laboratory experiments in a rotating tank, these results are qualitatively verified. (C) 2001 American Institute of Physics MH - Mexico|Baja California MH - Netherlands PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-6631 UR - ISI:000166478000008 L2 - BETA-PLANE; VORTICES; EVOLUTION; TRANSPORT; WALL SO - Physics of Fluids 2001 ;13(2):440-451 4243 UI - 14088 AU - Santamaria A AU - Galvan-Arzate S AU - Lisy V AU - Ali SF AU - Duhart HM AU - Osorio-Rico L AU - Rios C AU - St'astny F AD - Natl Inst Neurol & Neurosurg Manuel Velasco Suare, Dept Neurochem, Mexico City 14269, DF, MexicoAcad Sci Czech Republ, Inst Physiol, Dept Mol Neurobiol, CZ-14220 Prague 4, Czech RepublicUS FDA, Natl Ctr Toxicol Res, Div Neurotoxicol, Neurochem Lab, Jefferson, AR 72079, USAPrague Psychiat Ctr, Prague 18103 8, Czech RepublicSantamaria, A, Natl Inst Neurol & Neurosurg Manuel Velasco Suare, Dept Neurochem, Insurgentes Sur 3877, Mexico City 14269, DF, Mexico TI - Quinolinic acid induces oxidative stress in rat brain synaptosomes AB - The oxidative action of quinolinic acid (QUIN), and the protective effects of glutathione (GSH), and 2-amino-5-phosphonovaleric acid (APV), were tested in rat brain synaptosomes, Reactive oxygen species (ROS) formation was quantified after the exposure of synaptosomes to increasing concentrations of QUIN (25-500 muM) The potency of QUIN to induce lipid peroxidation (LP) was tested as a regional index of thiobarbituric acid-reactive substances (TBARS) production, and the antioxidant actions of both GSH (50 muM) and APV (250 muM) on QUIN-induced LP were evaluated in synaptosomes prepared from different brain regions. QUIN induced concentration-dependent increases in ROS formation and TBARS in all regions analyzed, but increased production of fluorescent peroxidized lipids only in the striatum and the hippocampus, whereas both GSH and APV decreased this index. These results suggest that the excitotoxic action of QUIN involves regional selectivity in the oxidative status of brain synaptosomes, and may be prevented by substances exhibiting antagonism at the NMDA receptor. NeuroReport 12:871-874 (C) 2001 Lippincott Williams & Wilkins MH - Czech Republic MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 21 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000167504700048 L2 - 2-amino-5-phosphonovaleric acid;brain regions;glutathione;oxidative stress;quinolinic acid;rat brain synaptosomes;INDUCED LIPID-PEROXIDATION; NERVOUS-SYSTEM; FREE-RADICALS; NEUROTOXICITY; GLUTAMATE; GLUTATHIONE; MEDIATORS; MEMBRANES; ISCHEMIA; BINDING SO - Neuroreport 2001 ;12(4):871-874 4244 UI - 12480 AU - Santana G AU - Morales-Acevedo A AD - IPN, Ctr Invest & Estudios Avanzados, Dept Elect Engn, Mexico City 07738, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana, CubaSantana, G, IPN, Ctr Invest & Estudios Avanzados, Dept Elect Engn, Mexico City 07738, DF, Mexico TI - Improving n(+)pp(+) single crystalline silicon solar cells by long high temperature Al annealing AB - In this work, we show that solar cells made on solar grade silicon can be improved by annealing them at high temperatures (800 degreesC) after the aluminum at the back is evaporated. This improvement is larger for longer annealing times. Both the short circuit current (Isc) and the open circuit voltage (Voc) increase due to an increase of the base minority carrier diffusion length and a reduction of dark current, respectively. This effect may be due to "gettering" of metallic impurities and precipitates at die bulk and junction regions of the cells. For this high annealing temperature we observed that the increase of Jsc tends to saturate after 60 minutes, while Voc continues increasing for annealing times above 150 minutes MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900008 L2 - ALUMINUM; BACK SO - Modern Physics Letters B 2001 ;15(17-19):601-604 4245 UI - 13066 AU - Santiago-Garcia J AU - Mas-Oliva J AU - Innerarity TL AU - Pitas RE AD - Univ Calif San Francisco, Gladstone Inst Neurol Dis, San Francisco, CA 94141, USAUniv Calif San Francisco, Gladstone Inst Cardiovasc Dis, San Francisco, CA 94141, USAUniv Calif San Francisco, Cardiovasc Res Inst, San Francisco, CA 94141, USAUniv Calif San Francisco, Dept Pathol, San Francisco, CA 94141, USANatl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoPitas, RE, Univ Calif San Francisco, Gladstone Inst Neurol Dis, POB 418100, San Francisco, CA 94141 USA TI - Secreted forms of the amyloid-beta precursor protein are ligands for the class A scavenger receptor AB - Upon activation, platelets secrete a 120-kDa protein that competes for the binding and internalization of acetyl low density lipoproteins (AcLDL) by macrophages. From the amino-terminal amino acid sequence, amino acid composition, and immunoblot analysis, we identified the active factor in platelet secretion products as sAPP, an alpha -secretase cleavage product of the beta -amyloid precursor protein (APP), that contains a Kunitz-type protease inhibitor (KPI) domain. We showed that both sAPP751 (also called Nexin II) and sAPP695, which does not contain a KPI domain, are ligands for the class A scavenger receptor (SR-A). Chinese hamster ovary cells stably transfected to express the SR-A bound and internalized 4-fold more human platelet-derived sAPP than control cells. The binding and internalization of sAPP were inhibited by the SR-A antagonist fucoidin. In addition, sAPP competed as effectively as fucoidin for SR-A-mediated cell association and degradation of I-125-AcLDL. To determine if the KPI domain is required for the binding of sAPP to the SR-A, APP751 and APP695 were expressed in Chinese hamster ovary cells, and sAPP751 and sAPP695 purified from the medium were tested for their binding to the SR-A. sAPP751 and sAPP695 were equally effective in competing for the cell association of I-125-AeLDL by SR-A-expressing cells, demonstrating that the KPI domain is not essential for binding. We also found that sAPP751 is present in extracts of atherosclerotic lesions and that sAPP competes for the SR-A-mediated cell association of oxidized low density lipoprotein. Deletion mutagenesis indicated that a negatively charged region of APP (residues 191-264) contributes to binding to the SR-A. These results suggest that the SR-A contributes to the clearance of sAPP and that sAPP competes for the cell association of other SR-A ligands MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000170472900011 L2 - LOW-DENSITY-LIPOPROTEIN; SULFATE PROTEOGLYCAN FORM; BOVINE SERUM-ALBUMIN; ALZHEIMERS-DISEASE; NEXIN-II; INHIBITORY PROPERTIES; IN-VIVO; MACROPHAGE; BINDING; CELLS SO - Journal of Biological Chemistry 2001 ;276(33):30655-30661 4246 UI - 14198 AU - Santillan M AU - Mackey MC AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoMcGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Math & Phys, Ctr Nonlinear Dynam, Montreal, PQ H3G 1Y6, CanadaSantillan, M, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Dynamic behavior in mathematical models of the tryptophan operon AB - This paper surveys the general theory of operon regulation as first formulated by Goodwin and Griffith, and then goes on to consider in detail models of regulation of tryptophan production by Bliss, Sinha, and Santillan and Mackey, and the interrelationships between them. We further give a linear stability analysis of the Santillan and Mackey model for wild type E. coli as well as three different mutant strains that have been previously studied in the literature. This stability analysis indicates that the tryptophan production systems should be stable, which is in accord with our numerical results. (C) 2001 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000167301400024 L2 - ESCHERICHIA-COLI; GROWTH; BACTERIA SO - Chaos 2001 ;11(1):261-268 4247 UI - 14297 AU - Santillan M AU - Mackey MC AD - McGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Ctr Nonlinear Dynam, Montreal, PQ H3G 1Y6, CanadaInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoMackey, MC, McGill Univ, Dept Physiol, 3655 Drummond St,Mcintyre Med Sci Bldg, Montreal, PQ H3G 1Y6, Canada TI - Dynamic regulation of the tryptophan operon: A modeling study and comparison with experimental data AB - A mathematical model for regulation of the tryptophan operon is presented. This model takes into account repression, feedback enzyme inhibition, and transcriptional attenuation, Special attention is given to model parameter estimation based on experimental data. The model's system of delay differential equations is numerically solved, and the results are compared with experimental data on the temporal evolution of enzyme activity in cultures of Escherichia coli after a nutritional shift (minimal + tryptophan medium to minimal medium). Good agreement is obtained between the numeric simulations and the experimental results for wild-type E. coli. as well as for two different mutant strains MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 34 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000166949200013 L2 - ESCHERICHIA-COLI; TRP REPRESSOR SO - Proceedings of the National Academy of Sciences of the United States of America 2001 ;98(4):1364-1369 4248 UI - 12368 AU - Santos A AU - Yuste SB AU - de Haro ML AD - Univ Extremadura, Dept Fis, E-06071 Badajoz, SpainUniv Florida, Dept Phys, Gainesville, FL 32611, USAUniv Calif San Diego, Dept Chem, La Jolla, CA 92093, USAUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoSantos, A, Univ Extremadura, Dept Fis, E-06071 Badajoz, Spain TI - Virial coefficients and equations of state for mixtures of hard discs, hard spheres and hard hyperspheres AB - The composition-independent virial coefficients of a d-dimensional binary mixture of (additive) hard hyperspheres following from a recent proposal for the equation of state of the mixture (SANTOS, A., YUSTE, S. B., and LOPEZ de HARO, M., 1999, Molec. Phys., 96, 1) are examined. Good agreement between theoretical estimates and available exact or numerical results is found for d = 2, 3, 4 and 5, except for mixtures whose components are very disparate in size. A slight modification that remedies this deficiency is introduced and the resummation of the associated virial series is carried out, leading to a new proposal for the equation of state. The case of binary hard sphere mixtures (d = 3) is analysed in some detail MH - Mexico|Morelos MH - Spain MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000172166000003 L2 - FLUID MIXTURES; DISKS; 5TH; DIMENSIONS; SYSTEM; PHASE SO - Molecular Physics 2001 ;99(23):1959-1972 4249 UI - 13367 AU - Santoyo E AU - Garcia R AU - Abella R AU - Aparicio A AU - Verma SP AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoCSIC, Museo Nacl Ciencias Nat, Dept Volcanol, E-28006 Madrid, SpainSantoyo, E, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Privada Xochicaico S-N,Col Ctr,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Capillary electrophoresis for measuring major and trace anions in thermal water and condensed-steam samples from hydrothermal springs and fumaroles AB - A new application of capillary electrophoresis for measuring major and trace anions in thermal water and condensed-steam samples is presented. Ten fluid samples were collected from hydrothermal springs and fumaroles located in a volcanic zone of Deception Island, Antarctica. Anion separation was achieved in less than 6 min using indirect UV detection at 254 nm with a negative power supply (-15 kV). The electrolyte consisted of 4.7 mM sodium chromate, 4.0 mM electroosmotic flow modifier (OFM) hydroxide, 10 mM 2-(N-cyclohexylamino)ethanesulfonic acid and 0.1 mM calcium gluconate (pH 9.1). Major anions (Cl-, SO42, PO4H2-, and CO3H-) were measured using hydrostatic injection (10 cm for 30 s) at 25 degreesC. Trace amounts of anions (F-, Br- and NO3-) were better determined by electromigration injection (4 kV, 10 s) at 15 degreesC. Good reproducibility of the migatlon times (<0.72% RSD), a satisfactory linear response and accuracy as weLI as acceptable detection limits were successfully obtained. (C) 2001 Published by Elsevier Science BN MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000169580900040 L2 - water analysis;geochemistry;inorganic anions;ION CHROMATOGRAPHY; INORGANIC ANIONS; OPTIMIZATION; SEPARATION; ELEMENTS SO - Journal of Chromatography A 2001 ;920(1-2):325-332 4250 UI - 12574 AU - Sara M AU - Gomez P AU - Sara A AD - Univ Genoa, Dipartimento Studio Terr & Risorse, I-16132 Genoa, ItalyUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoSara, M, Univ Genoa, Dipartimento Studio Terr & Risorse, Corso Europa 26, I-16132 Genoa, Italy TI - East Pacific Mexican Tethya (Porifera : Deniospongiae) with descriptions of five new species AB - Seven species of Tethyidae (Porifera: Demospongiae: Hadromerida) inhabiting the Pacific waters of Mexico, including the Gulf of California, were studied. Five of them, Tethya ensis, T mexicana, T. ovum, T. paroxeata, and T. socius are new species. The remaining two, T. taboga De Laubenfels and T. californiana De Laubenfels, are new records for the area MH - Italy MH - Mexico|Distrito Federal PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 1 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000171674900023 L2 - DEMOSPONGIAE SO - Proceedings of the Biological Society of Washington 2001 ;114(3):794-821 4251 UI - 11478 AU - Satnoianu RA AU - Maini PK AU - Garduno FS AU - Armitage JP AD - Univ Oxford, Inst Math, Ctr Math Biol, Oxford OX1 3LB, EnglandUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoUniv Oxford, Dept Biochem, Oxford OX1 3QU, EnglandSatnoianu, RA, Univ Oxford, Inst Math, Ctr Math Biol, 24-29 St Giles, Oxford OX1 3LB, England TI - Travelling waves in a nonlinear degenerate diffusion model for bacterial pattern formation AB - We study a reaction diffusion model recently proposed in [5] to describe the spatiotemporal evolution of the bacterium Bacillus subtilis on agar plates containing nutrient. An interesting mathematical feature of the model, which is a coupled pair of partial differential equations, is that the bacterial density satisfies a degenerate nonlinear diffusion equation. It was shown numerically that this model can exhibit quasi-one-dimensional constant speed travelling wave solutions. We present an analytic study of the existence and uniqueness problem for constant speed travelling wave solutions. We find that such solutions exist only for speeds greater than some threshold speed giving minimum speed waves which have a sharp profile. For speeds greater than this minimum speed the waves are smooth. We also characterise the dependence of the wave profile on the decay of the front of the initial perturbation in bacterial density. An investigation of the partial differential equation problem establishes, via a global existence and uniqueness argument, that these waves are the only long time solutions supported by the problem. Numerical solutions of the partial differential equation problem are presented and they confirm the results of the analysis MH - United Kingdom MH - Mexico|Distrito Federal PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 15 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1531-3492 UR - ISI:000174783200004 L2 - degenerate diffusion;travelling waves;bacterial chemotaxis;phase plane analysis;nonlinear coupled parabolic equations;AUTOCATALYTIC CHEMICAL-SYSTEM; TRAVELING WAVES; EQUATIONS SO - Discrete and Continuous Dynamical Systems-Series B 2001 ;1(3):339-362 4252 UI - 12417 AU - Saucedo-Morales J AU - Bieging J AD - Univ Arizona, Steward Observ, Tucson, AZ 85721, USAUniv Sonora, Area Astron CIFUS, Hermosillo, Sonora, MexicoSaucedo-Morales, J, Univ Arizona, Steward Observ, Cherry 933 N, Tucson, AZ 85721 USA TI - An empirical picture for the evolution of galaxies outside of clusters AB - The main goal of this work is to study the properties of isolated elliptical galaxies with the hope of learning about their formation and evolution. A sample that contains similar to 25% of the galaxies classified as ellipticals in the Karachentseva Catalog of Isolated Galaxies is investigated. Approximately one half of these galaxies appear to be misclassified, a result which may imply a reduction of the percentage of ellipticals in the Karachentseva catalog to (6 +/-2% of the total population of isolated galaxies. A significant number of merger candidates has also been found among the isolated galaxies. It is argued that the fraction of merger candidates to isolated ellipticals can be used to constrain models for the evolution of compact groups into isolated galaxies MH - USA MH - Mexico|Sonora PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900108 L2 - galaxies;evolution;environment;isolated;compact groups;COMPACT-GROUPS; MORPHOLOGY SO - Astrophysics and Space Science 2001 ;277():449-452 4253 UI - 11807 AU - Saucedo-Munoz ML AU - Liu SC AU - Hashida T AU - Takahashi H AU - Nakajima H AD - Tohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 9808579, JapanInst Politecn Nacl, ESIQIE, Mexico City 07300, DF, MexicoDalian Inst Railway Technol, Dept Mat Engn, Dalian 116022, Peoples R ChinaJapan Atom Energy Res Inst, Naka, Ibaraki 31102, JapanSaucedo-Munoz, ML, Tohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 9808579, Japan TI - Correlationship between J(IC) and equivalent fracture strain determined by small-punch tests in JN1, JJ1 and JK2 austenitic stainless steels AB - Small-punch (SP) and fracture toughness tests were conducted at 4 and 77 K on newly developed cryogenic austenitic stainless steels after isothermal aging. Equivalent fracture strain epsilon(qf) was determined by measuring the reduction in thickness of SP specimens. A linear dependence of J(IC) on epsilon(qf) was found for these new materials. Regression analysis of experimental data produced the linear relation: J(IC) = 1304.1epsilon(qf) + 8.09 (kJ m(-2)). An analysis of the correlation was pursued on the basis of material properties and evaluation method of J(IC). The results Showed that the slope value was influenced by the J(IC) evaluation method. This linear relation enables the prediction of J(IC) to be made from the equivalent fracture strain epsilon(qf) by conducting small punch tests. Thus, it is expected that the SP testing method provides a useful basis for assessing the degradation of fracture toughness in small areas, such as heataffected zones in welded components. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Physics, Applied U5 - J;Article AV - English IS - 0011-2275 UR - ISI:000173836500003 L2 - fracture toughness;cryogenic temperatures;austenitic stainless steel;TOUGHNESS; BEHAVIOR; REACTOR SO - Cryogenics 2001 ;41(10):713-719 4254 UI - 13325 AU - Sauer W AU - He J AU - Fan MZ AU - Cervantes M AU - Kies A AU - Caine W AD - Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, CanadaUniv Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaUniv Autonoma Baja California, ICA, Mexicali 21100, Baja California, MexicoDSM Food Specialties, NL-2600 MA Delft, NetherlandsAlberta Dept Agr, Food & Rural Dept, Edmonton, AB T6H 4P2, CanadaSauer, W, Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, Canada TI - Variability of amino acid digestibility in pigs: inherent factors in feedstuffs and considerations in methodology AB - There is an abundance of information in the literature on apparent ileal amino acid digestibility values in feedstuffs for pigs. In addition to differences in ileal amino acid digestibility values between feedstuffs, there are surprisingly large differences in ileal amino acid digestibility values among different samples of the same feedstuff(in name). In addition to different processing conditions and inherent factors among samples of the same feedstuff, a proportion of the variation can be attributed to different approaches in methodology to determine amino acid digestibility values. It should also be kept in mind that other factors, including the technique used for collection of ileal digesta, may affect, depending on the feedstuff in question, amino acid digestibility values. As far as methodology is concerned, differences in dietary amino acid levels may contribute to the variation in ileal amino acid digestibility values within the same feedstuff. Dietary amino acid levels quadratically affect ileal amino acid digestibility values. In order to remove the effect of dietary amino acid levels, the plateau ileal amino acid digestibility values should be determined. Methods of determination, the direct versus difference versus regression method, can also affect ileal digestibility values within the same feedstuff. In order to estimate this variation, methods of determination specifically suited for different feedstuffs are recommended. As a concluding remark, it is important to take into account the previous considerations when amino acid digestibility values from the literature are compiled for the purpose of reference for diet formulation for pigs MH - Canada MH - Mexico|Baja California MH - Netherlands PB - JABLONNA: KIELANOWSKI INST ANIMAL PHYSIOLOGY NUTRITION RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 1230-1388 UR - ISI:000169730200010 L2 - ileal digestibility;amino acids;feedstuffs;variation;pigs;methodology;GROWING-FINISHING PIGS; SLOPE-RATIO ASSAY; SOYBEAN-MEAL; APPARENT DIGESTIBILITY; CHEMICAL TECHNIQUES; REGRESSION METHODS; CANOLA-MEAL; BONE MEAL; ILEAL; AVAILABILITIES SO - Journal of Animal and Feed Sciences 2001 ;10():115-138 4255 UI - 14350 AU - Savel'ev SE AU - Ramirez-Santiago G AD - All Russian Elect Engn Inst, Moscow, RussiaUniv Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, JapanUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoSavel'ev, SE, All Russian Elect Engn Inst, Moscow, Russia TI - Generalized spherical version of the Blume-Emery-Griffiths model with ferromagnetic and antiferromagnetic interactions AB - We have investigated analytically the phase diagram of a generalized spherical version of the Blume-Emery-Griffiths model that includes ferromagnetic or antiferromagnetic spin interactions as well as quadrupole interactions in zero and nonzero magnetic field. We show that in three dimensions and zero magnetic field a regular paramagnetic-ferromagnetic (PM-FM) or a paramagnetic-antiferromagnetic (PM-AFM) phase transition occurs whenever the magnetic spin interactions dominate over the quadrupole interactions. However, when spin and quadrupole interactions are important, there appears a reentrant FM-PM or AFM-PM phase transition at low temperatures, in addition to the regular PM-FM or PM-AFM phase transitions. On the other hand, in a nonzero homogeneous external magnetic field H, we find no evidence of a transition to the state with spontaneous magnetization for FM interactions in three dimensions. Nonetheless, for AFM interactions we do Set a scenario similar to that described above for zero external magnetic field, except that the critical temperatures are now functions of H. We also find two critical field values, H-c1, at which the reentrance phenomenon disappears and H-c2 (H(c1)approximate to0.5H(c2)), above which the PM-AFM transition temperature vanishes MH - Japan MH - Mexico|Distrito Federal MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000166820600077 L2 - QUANTUM; TRANSITION; BEHAVIOR; SYSTEM SO - Physical Review B 2001 ;6305(5): 4256 UI - 14038 AU - Savoie JM AD - INRA, Unite Rech Champignons, F-33883 Villenave Dornon, FranceInst Ecol, Dept Hongos, Xalapa 91000, Veracruz, MexicoSavoie, JM, INRA, Unite Rech Champignons, BP 81, F-33883 Villenave Dornon, France TI - Variability in brown line formation and extracellular laccase production during interaction between white-rot basidiomycetes and Trichoderma harzianum biotype Th2 AB - Antagonisms between Trichoderma spp. and white-rot fungi are of interest for lignocellulose degradation and mushroom cultivation. Production of emergent hyphae, formation of pigmented barrages and production of laccases were followed and compared during confrontations between mycelia of two T. harzianum isolates with seven wood-rotting and seven leaf litter-rotting basidiomycetes. No specific defense pattern associated with each group of basidiomycete was identified but the number of species forming barrages with pigmented zones was higher in the group of wood decayers. Trichoderma harzianum induced increases in extracellular laccase activities only with some basidiomycete species. The two harzianum had been isolated as mushroom antagonists from two different media. Differences in their aggressiveness resulted in differences in the time given to the basidiomycetes for developing their resistance mechanisms. The biotype Th2 from white button mushroom compost was the stronger antagonist and could be a source of problems in solid state fermentations with different white rot basidiomycetes if it contaminates them MH - France MH - Mexico|Veracruz PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 9 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000167653200002 L2 - competition;laccase;litter fungi;mushrooms;wood fungi;LENTINULA-EDODES; BIOLOGICAL-CONTROL; FUNGI SO - Mycologia 2001 ;93(2):243-248 4257 UI - 10988 AU - Sawada-Satoh S AU - Inoue M AU - Shibata KM AU - Kameno S AU - Nakai N AU - Migenes V AU - Diamond PJ AD - NAO, Mitaka, Tokyo 1818588, Japan. Univ Guanajuato, Guanajuato 36000, Mexico. JBO, Jodrell Bank, Macclesfield SK11 9DL, Cheshire, England TI - HI and OH absorption of the nuclear region of NGC 3079 AB - We conducted an observation of weak H I and OH absorption features in the parsec-scale nuclear region of NGC 3079 using a global VLBI network; the VLBA, the VLA and the Green Bank 43-m telescope of NRAO. One mas corresponds to 0.076 pc in NGC 3079 MH - United Kingdom MH - Japan MH - Mexico|Guanajuato T3 - GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONSIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBU43Z AV - English IS - 0074-1809 UR - ISI:000175998000066 SO - 2001 ;(205):196-197 4258 UI - 12981 AU - Sawada T AU - Hasegawa T AU - Handa T AU - Morino JI AU - Oka T AU - Booth R AU - Bronfman L AU - Hayashi M AU - Castellanos AL AU - Nyman LA AU - Sakamoto S AU - Seta M AU - Shaver P AU - Sorai K AU - Usuda KS AD - Univ Tokyo, Inst Astron, Mitaka, Tokyo 1810015, JapanNatl Astron Observ, Mitaka, Tokyo 1518588, JapanNatl Astron Observ, Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, JapanNatl Astron Observ, Subaru Telescope, Hilo, HI 96720, USAUniv Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1130013, JapanRIKEN, Inst Phys & Chem Res, Cosm Radiat Lab, Wako, Saitama 3510198, JapanChalmers Univ Technol, Onsala Space Observ, S-43992 Onsala, SwedenUniv Chile, Dept Astron, Santiago, ChileInst Nacl Astrofis Opt & Elect Apartados, Puebla 72000, MexicoEuropean So Observ, Swedish ESO Submillimetre Telescope, Santiago 19, ChileCommun Res Labs, Koganei, Tokyo 1848795, JapanEuropean So Observ, D-85748 Garching, GermanyHokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, JapanSawada, T, Univ Tokyo, Inst Astron, Mitaka, Tokyo 1810015, Japan TI - The Tokyo-Onsala-ESO-Calan Galactic CO J=2-1 survey. I. The Galactic center region AB - As a part of the Tokyo-Onsala-ESO-Calan Galactic CO survey, we have made large-scale mapping observations of the Galactic center in the CO J = 2-1 line using the 60 cm survey telescope in Chile. The data were taken with the same beam size (9 ') and sampling grid (7.'5) as the CO J = 1-0 Columbia survey, so that the two data sets can be compared directly. Velocity channel maps and longitude-velocity diagrams of the (CO)-C-12 J = 2-1 line, covering - 6 degrees less than or equal to I less than or equal to 6 degrees, - 2 degrees less than or equal to b less than or equal to 2 degrees, -300 less than or equal to nu (LSR) less than or equal to 300 km s(-1), are presented, along with the corresponding maps of the (CO)-C-12 J = 2-1/1J = 1-0 intensity ratio [R2-1/1-0((CO)-C-12)]. A longitude-velocity diagram of the (CO)-C-13 J = 2-1 line intensity and corresponding (CO)-C-13 J = 2-1/(CO)-C-12 J = 2-1 intensity ratio [R-13/12(J = 2-1)] is also presented at b = 0 degrees. The overall R2-1/1-0((CO)-C-12) in the central 900 pc of the Galaxy is 0.96 +/- 0.01, which is higher than the typical value in the Galactic disk, 0.6-0.7. The isotopic intensity ratio R-13/12(J = 2-1) is 0.10 +/- 0.01. The two observed intensity ratios [R2-1/1-0((CO)-C-12) and R-13/12(j = 2-1)] indicate that the optical depth of the (CO)-C-12 J = 1-0 line is similar to1 or smaller in the Galactic center molecular clouds, much smaller than those of the giant molecular clouds (GMCs) in the Galactic disk. Longitude-velocity distributions of physical properties of molecular gas are derived using a large velocity gradient analysis. Molecular gas in the Galactic center generally shows a high pressure. In particular, there is a high-pressure region in the central similar to 100 pc where the pressure is an order of magnitude higher than that in GMCs in the Galactic disk. This region is dominated by high-density gas and contains star-forming regions MH - Chile MH - Germany MH - Japan MH - Mexico|Puebla MH - Sweden MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000170705000008 L2 - Galaxy : center;ISM : clouds;ISM : molecules;radio lines : ISM;surveys;MOLECULAR CLOUD COMPLEX; CARBON-MONOXIDE; MILKY-WAY; PHYSICAL CONDITIONS; LINE OBSERVATIONS; GAS-DISTRIBUTION; GALAXY; EMISSION; RING; HCN SO - Astrophysical Journal Supplement Series 2001 ;136(1):189-219 4259 UI - 12606 AU - Schally AV AU - Gual C AD - Vet Affairs Med Ctr, Endocrine Polypeptide & Canc Inst, New Orleans, LA 70112, USATulane Univ, Sch Med, Dept Med, New Orleans, LA 70112, USAInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoAcad Nacl Med, Mexico City, DF, MexicoSchally, AV, Vet Affairs Med Ctr, Endocrine Polypeptide & Canc Inst, 151,Room 7F109,1601 Perdido St, New Orleans, LA 70112 USA TI - Some recollections of early clinical studies on hypothalamic hormones: A tale of a successful international collaboration MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 1051-2144 UR - ISI:000171735900001 L2 - THYROTROPIN-RELEASING HORMONE; BENIGN PROSTATIC HYPERPLASIA; ANTAGONIST CETRORELIX; LH; CANCER; THERAPY; ANALOGS; FSH; SECRETION; PROLACTIN SO - Endocrinologist 2001 ;11(5):341-349 4260 UI - 12281 AU - Scherrer RJ AU - Gaztanaga E AD - Ohio State Univ, Dept Phys, Columbus, OH 43210, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAINAOE, Puebla 7200, MexicoCSIC, Inst Estudia Espacils Catalunya, Res Unit, ES-08034 Barcelona, SpainScherrer, RJ, Ohio State Univ, Dept Phys, Columbus, OH 43210, USA TI - The real- and redshift-space density distribution functions for large-scale structure in the spherical collapse approximation AB - We use the spherical collapse (SC) approximation to derive expressions for the smoothed redshift-space probability distribution function (PDF), as well as the p-order hierarchical amplitudes S-p, in both real and redshift space. We compare our results with numerical simulations, focusing on the Omega = 1 standard CDM model, where redshift distortions are strongest. We find good agreement between the SC predictions and the numerical PDF in real space even for sigma (L) greater than or similar to 1, where sigma (L) is the linearly evolved rms fluctuation on the smoothing scale. In redshift space, reasonable agreement is possible only for sigma (L) less than or similar to 0.4. Numerical simulations also yield a simple empirical relation between the real-space PDF and the redshift-space PDF: we find that for sigma (L) < 1, the redshift-space PDF, [P((z))], is, to a good approximation, a simple rescaling of the real-space PDF, P[delta], i.e., P[delta/sigma ]d[delta/sigma] = P[delta ((z))/sigma ((z))]d[delta ((z))/sigma ((z))], where sigma and sigma ((z)) are the real-space and redshift-space rms fluctuations, respectively. This result applies well beyond the validity of linear perturbation theory, and it is a good fit for both the standard CDM model and the Lambda CDM model. It breaks down for SCDM at sigma (L) approximate to 1, but provides a good fit to the Lambda CDM models for sigma (L) as large as 0.8 MH - Mexico|Puebla MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000172484900025 L2 - galaxies : clusters : general;large-scale structure of Universe;COSMOLOGICAL PERTURBATION-THEORY; GRAVITATIONAL-INSTABILITY; CORRELATION HIERARCHY; LAGRANGIAN APPROACH; EVOLUTION; FLUCTUATIONS; EDGEWORTH; GRAVITY; FIELDS; MODEL SO - Monthly Notices of the Royal Astronomical Society 2001 ;328(1):257-265 4261 UI - 12777 AU - Schmeda-Hirschmann G AU - Villasenor-Garcia MM AU - Lozoya X AU - Puebla-Perez AM AD - Univ Talca, Inst Quim Recursos Nat, Lab Quim Prod Nat, Talca, ChileIMSS, Ctr Invest Biomed Occidente, Lab Inmunofarmacol Prod Nat, Guadalajara 44340, Jalisco, MexicoSchmeda-Hirschmann, G, Univ Talca, Inst Quim Recursos Nat, Lab Quim Prod Nat, Casilla 747, Talca, Chile TI - Immunomodulatory activity of Chilean Cyttaria species in mice with L5178Y lymphoma AB - The immunomodulatory effect of hydrosoluble extracts of four Chilean Cyttaria species (Discomycetes, Fungi) was assessed in mice with L5178Y lymphoma, Oral administration of 100 mg: extract per day for 7 days enhanced the percentual phagocytosis and phagocytosis index in animals receiving Cyttaria berteroi, Cyttaria darwinii, Cyttaria espinosae and Cyttaria hariot! extracts. Differences in the digestion index were observed in mice treated with C. darwinii and C. berteroi. In the delayed-type hypersensitivity model, only C. harioti was able to modify the immune response. The results suggest that intake of Cyttaria can improve the immune system of consumers, (C) 2001 Elsevier Science Ireland Ltd. All rights reserved MH - Chile MH - Mexico|Jalisco PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000171245700017 L2 - Cyttaria berteroi;Cyttaria darwinii;Cyttaria espinosae;Cyttaria harioti;cyttariales;discomycetes;immunomodulatory activity;L5178Y lymphoma;CONTACT HYPERSENSITIVITY; CELLS SO - Journal of Ethnopharmacology 2001 ;77(2-3):253-257 4262 UI - 12325 AU - Scholz T AU - guirre-Macedo ML AU - Salgado-Maldonado G AD - Natl Polytech Inst, Ctr Invest & Adv Studies, IPN, CINVESTAV,Unidad Merida, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, Ceske Budejovice 37005, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoScholz, T, Natl Polytech Inst, Ctr Invest & Adv Studies, IPN, CINVESTAV,Unidad Merida, Carretera Antigua Progreso Km 6,AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Trematodes of the family Heterophyidae (Digenea) in Mexico: a review of species and new host and geographical records AB - A review of heterophyid trematodes found in Mexico. both as metacercariae encysted in fish and adults in fish-eating birds and mammals, is presented, including numerous new geographical and host records. Data on the morphology, spectrum of intermediate and definitive hosts, site of infection of metacercariae, distribution in Mexico and biology of the following species are provided (species first reported from Mexico marked with an asterisk): *A-scocotyle (Ascocotyle) gemina Font. Overstreet and Heard, 1984: A. (A.) leighi Burton. 1956; A. (A.) tenuicollis Price, 1935, A. (Leighia) chandleri Lumsden, 1963; *A. (L.) mcintoshi Price. 1936, A. (L.) megalocephala Price. 1932, A. (L.) nunezae Scholz, Vargas-Vazquez. Vidal-Martinez and Aguirre-Macedo. 1997 Ascocotyle (Leighia) sp.; *A. (Phagicola) ampullacca Miller and Hark-ema, 1962, A. (P.) diminuta Stunkard and Haviland, 1924; A. (P.) macrostoma (Robinson, 1956); *A. (R) longa Ransom, 1920; A. (P,) nana Ransom. 1920, Centrocestus formosanus (Nishigori, 1924) *Euhaplorchis californiensis Martin. 1950: Galactosomum puffini Yamaguti, 1941: *Haplorchis pumilio (Looss, 1896): Heterophyidae gen. sp. ( = Haplorchoides sp. of Scholz and Vargas-Vazquez, 1998). *Phocitremoides orale Martin, 1950 and *Pygidiopsis pindoramensis (Travassos. 1929). Two of the above-listed species. C. formosanus and H. pumilio. have been introduced recently to Mexico. most probably from Asia with the imported thiarid snail Melanoides tuberculata (Muller). Metacercariae of heterophyid trematodes are among the most frequent and abundant parasites of fish in Mexico, in particular in its southeastern part MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 16 U4 - Biodiversity Conservation;Ecology U5 - J;Review AV - English IS - 0022-2933 UR - ISI:000172377900001 L2 - Heterophyidae;fish;Mexico;taxonomy;biology;geographical distribution;CENTROCESTUS-FORMOSANUS NISHIGORI; YUCATAN PENINSULA; NEOTROPICAL REGION; LIFE-HISTORY; CICHLASOMA-UROPHTHALMUS; SOUTHERN FLORIDA; CICHLID FISH; SP-N; ASCOCOTYLE; METACERCARIAE SO - Journal of Natural History 2001 ;35(12):1733-1772 4263 UI - 13490 AU - Scholz T AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicIPN, CINVESTAV, Parasitol Lab, Merida Unit, Merida 97310, Yucatan, MexicoNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoScholz, T, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Metacestodes of the family Dilepididae (Cestoda : Cyclophyllidea) parasitising fishes in Mexico AB - A survey of metacestodes of dilepidid tapeworms (Cyclophyllidea) occurring in fish from Mexico is presented. They belong to the following species (those first reported from Mexico marked with an asterisk): Cyclustera capito (Rudolphi, 1819); *Cyclustera cf. ralli (Underwood & Dronen, 1986); Dendrouterina pilherodiae Mahon, 1956; (*)Glossocercus auritus (Rudolphi, 1819); (*)G. caribaensis (Rysavy & Macko, 1973); *Paradilepis caballeroi Rysavy & Macko, 1973; *Paradilepis cf. urceus (Wedl, 1855); *Paradilepis sp.; Parvitaenia cochlearii Coil, 1955; *Parvitaenia macropeos (Wedl, 1855); *Valipora campylancristrota (Wedl, 1855); *V. mutabilis Linton, 1927; and *V. minuta (Coil, 1950). Metacestodes of Dendrouterina papillifera (Fuhrmann, 1908), previously reported from the gall-bladder of the pimelodid catfish Rhamdia guatemalensis from Mexico by Scholz et al. (1996), belong actually to V. minuta. Data on the morphology of metacestodes, their fish hosts and rate of infection, site and distribution in Mexico are provided MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 16 U4 - Parasitology U5 - J;Article AV - English IS - 0165-5752 UR - ISI:000169131000003 L2 - ACANTHOCEPHALA; HELMINTHS; EUCESTODA SO - Systematic Parasitology 2001 ;49(1):23-40 4264 UI - 12343 AU - Schon T AU - Hernandez-Pando RH AU - Negesse Y AU - Leekassa R AU - Sundqvist T AU - Britton S AD - Linkoping Univ, Fac Hlth Sci, Dept Med Microbiol, S-58185 Linkoping, SwedenInst Nacl Nutr Salvador Zubiran, Expt Pathol Lab, Mexico City 14000, DF, MexicoAHRI, Addis Ababa, EthiopiaAll Africa Leprosy Relief & Training Hosp, ALERT, Addis Ababa, EthiopiaKarolinska Hosp, Dept Infect Dis, S-10401 Stockholm, SwedenSchon, T, Linkoping Univ, Fac Hlth Sci, Dept Med Microbiol, S-58185 Linkoping, Sweden TI - Expression of inducible nitric oxide synthase and nitrotyrosine in borderline leprosy lesions AB - Background In the response to T-helper cell. (Th1)-type cytokines and interactions with pathogens, high levels of nitric oxide (NO) are produced by activated macrophages. expressing the inducible NO synthase (iNOS). The role and importance of reactive nitrogen intermediates (RNIs) such as NO and peroxynitrite in the host response to diseases caused by intracellular pathogens such as Mycobacterium leprae and M. tuberculosis is unclear. Objectives The aim of this study was to investigate the presence of local production of NO and peroxynitrite in borderline leprosy by using antibodies against iNOS and the product of peroxynitrite, nitrotyrosine (NT). Methods We detected the presence of iNOS and NT in skin biopsies from borderline leprosy patients, with and without reversal reaction (RR), by immunohistochemistry (n=26). Results In general, the granulomas from borderline leprosy lesions with and without RR showed high and specific expression of iNOS and NT. Moreover, strong immunoreactivity to iNOS and NT was observed in granulomas surrounding and infiltrating dermal nerves. The expression of iNOS and NT was also strong in keratinocytes, fibroblasts and endothelial cells in close relation to the granulomatous reaction. In contrast, normal human skin showed no expression of iNOS. and NT in these cells. Conclusions We conclude that iNOS and NT are expressed in granulomas from borderline leprosy patients with and without RR and propose that RNIs might be involved in the nerve damage following RR in leprosy MH - Ethiopia MH - Mexico|Distrito Federal MH - Sweden PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Dermatology U5 - J;Article AV - English IS - 0007-0963 UR - ISI:000172342400018 L2 - iNOS;leprosy;neuritis;nitric oxide;nitrotyrosine;reversal reaction;MYCOBACTERIUM-TUBERCULOSIS; HUMAN SKIN; TNF-ALPHA; MACROPHAGES; METABOLITES; CYTOKINES; GAMMA; CELLS SO - British Journal of Dermatology 2001 ;145(5):809-815 4265 UI - 13488 AU - Schondube JE AU - Herrera M AU - del Rio CM AD - Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoSchondube, JE, Univ Arizona, Dept Ecol & Evolutionary Biol, Biol Sci W,Room 310, Tucson, AZ 85721 USA TI - Diet and the evolution of digestion and renal function in phyllostomid bats AB - Bat species in the monophyletic family Phyllostomidae feed on blood, insects, small vertebrates, nectar, fruit and complex omnivorous mixtures. We used nitrogen stable isotope ratios to characterize bat diets and adopted a phylogenetically informed approach to investigate the physiological changes that accompany evolutionary diet changes in phyllostomids. We found that nitrogen stable isotopes separated plant-eating from animal-eating species. The blood of the latter was enriched in N-15. A recent phylogenetic hypothesis suggests that with the possible exception of carnivory, which may have evolved twice, all diets evolved only once from insectivory. The shift from insectivory to nectarivory and frugivory was accompanied by increased intestinal sucrase and maltase activity, decreased trehalase activity, and reduced relative medullary thickness of kidneys. The shift from insectivory to sanguinivory and carnivory resulted in reduced trehalase activity. Vampire bats are the only known vertebrates that do not exhibit intestinal maltase activity. We argue that these physiological changes are adaptive responses to evolutionary diet shifts MH - USA MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Zoology U5 - J;Article AV - English IS - 0944-2006 UR - ISI:000169227800007 L2 - bats;comparative method;diet;digestive and renal function;stable isotopes;URINE CONCENTRATING ABILITY; ANCESTRAL CHARACTER STATES; INTESTINAL ENZYMES; NEOTROPICAL BATS; ADAPTATION; NECTAR; PHYLOGENIES; LIMITATIONS; MODULATION; PHYSIOLOGY SO - Zoology-Analysis of Complex Systems 2001 ;104(1):59-73 4266 UI - 11636 AU - Schreier G AU - DeLeon J AU - Glumineau A AU - Boisliveau R AD - Ecole Cent Nantes, IRCCyN, CNRS, UMR 6597, F-44312 Nantes 3, FranceUniv Nuevo Leon, Dept Elect Engn, San Nicolas De Los Garza, Nuevo Leon, MexicoSchreier, G, Ecole Cent Nantes, IRCCyN, CNRS, UMR 6597, BP 92101,1 Rue Noe, F-44312 Nantes 3, France TI - Cascade nonlinear observers: application to an experimental induction motor benchmark AB - A cascade observer for a class of nonlinear, state affine, cascade systems is proposed to estimate the state of the induction motor. The observer is validated on the experimental set-up of an induction motor benchmark located at 1RCCyN (Nantes, France) MH - France MH - Mexico|Nuevo Leon PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 1350-2379 UR - ISI:000174328600011 SO - Iee Proceedings-Control Theory and Applications 2001 ;148(6):509-515 4267 UI - 12226 AU - Schubert C AD - Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, FranceUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoCalif Inst Phys & Astrophys, Palo Alto, CA, USASchubert, C, Lab Annecy Le Vieux Phys Particules, Chemin Bellevue,BP 110, F-74941 Annecy Le Vieux, France TI - Perturbative quantum field theory in the string-inspired formalism AB - We review the status and present range of applications of the "string-inspired" approach to perturbative quantum field theory. This formalism offers the possibility of computing effective actions and S-matrix elements in a way which is similar in spirit to string perturbation theory, and bypasses much of the apparatus of standard second-quantized field theory. Its development was initiated by Bern and Kosower, originally with the aim of simplifying the calculation of scattering amplitudes in quantum chromodynamics and quantum gravity. We give a short account of the original derivation of the Bern-Kosower rules from string theory. Strassler's alternative approach in terms of first-quantized particle path integrals is then used to generalize the formalism to more general field theories, and, in the abelian case, also to higher loop orders. A considerable number of sample calculations are presented in detail, with an emphasis on quantum electrodynamics. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 62 U4 - Physics, Multidisciplinary U5 - J;Review AV - English IS - 0370-1573 UR - ISI:000172604100001 L2 - NONLINEAR SIGMA-MODELS; WORLD-LINE FORMALISM; MECHANICAL PATH-INTEGRALS; STRONG MAGNETIC-FIELD; ONE-LOOP AMPLITUDES; YANG-MILLS THEORY; RELATIVISTIC PARTICLE PROPAGATORS; CONSTANT ELECTROMAGNETIC-FIELDS; VACUUM POLARIZATION TENSORS; HIGHER-DERIVATIVE EXPANSION SO - Physics Reports-Review Section of Physics Letters 2001 ;355(2-3):73-234 4268 UI - 13391 AU - Schwartlander B AU - Stover J AU - Walker N AU - Bollinger L AU - Gutierrez JP AU - McGreevey M AU - Opuni M AU - Forsythe S AU - Kumaranayake L AU - Watts C AU - Bertozzi S AD - UNAIDS, Joint United Nations Programme HIV AIDS, Geneva, SwitzerlandFutures Grp Int, Washington, DC 20036, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoLondon Sch Hyg & Trop Med, Dept Publ Hlth & Policy, London WC1, EnglandSchwartlander, B, UNAIDS, Joint United Nations Programme HIV AIDS, Geneva, Switzerland TI - AIDS - Resource needs for HIV/AIDS MH - United Kingdom MH - Mexico|Morelos MH - Switzerland MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 82 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000169658200022 SO - Science 2001 ;292(5526):2434-2436 4269 UI - 12631 AU - Schwarz DJ AU - Terrero-Escalante CA AU - Garcia AA AD - Vienna Tech Univ, Inst Theoret Phys, A-1040 Vienna, AustriaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoGarcia, AA, Vienna Tech Univ, Inst Theoret Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria TI - Higher order corrections to primordial spectra from cosmological inflation AB - We calculate power spectra of cosmological perturbations at high accuracy for two classes of inflation models. We classify the models according to the behaviour of the Hubble distance during inflation. Our approximation works if the Hubble distance can be approximated either to be a constant or to grow linearly with cosmic time. Many popular inflationary models can be described in this way, e.g., chaotic inflation with a monomial potential, power-law inflation and inflation at a maximum. Our scheme of approximation does not rely on a slow-roll expansion. Thus we can make accurate predictions for some of the models with large slow-roll parameters. (C) 2001 Elsevier Science B.V. All rights reserved MH - Austria MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 60 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000171479800002 L2 - cosmology;inflation;cosmological perturbations;SLOW-ROLL; PERTURBATIONS; UNIVERSE SO - Physics Letters B 2001 ;517(3-4):243-249 4270 UI - 12201 AU - Scrosati R AD - CIBNOR, NW Biol Res Ctr, La Paz 23000, Baja Calif Sur, MexicoScrosati, R, 2013 W 43rd Ave, Vancouver, BC V6M 2C8, Canada TI - Population dynamics of Caulerpa sertularioides (Chlorophyta : Bryopsidales) from Baja California, Mexico, during El Nino and La Nina years AB - This study monitored the abundance of the tropical/subtropical seaweed Caulerpa sertularioides (Chlorophyta: Bryopsidales) from a sandy beach from Balandra Cove, on the south-eastern coast of the Baja California Peninsula, Mexico, between April 1998 and April 2000, including consecutive El Nino and La Nina events. El Nino conditions, indicated by relatively high seawater temperatures, were associated with a high population abundance (April-June 1998), whereas La Nina conditions, indicated by relatively low temperatures, were associated with the absence of C. sertularioides (April-June 1999 and April 2000). Caulerpa sertularioides was present during other times of the year during the study period, but never with the high abundance reached during El Nino conditions. Seaweeds of temperate affinity occurring in Baja California, such as Gelidium robustum (Rhodophyta: Gelidiales) and Macrocystis pyrifera (Phaeophyceae: Laminariales), decreased sharply in abundance during El Nino conditions. Therefore, the biogeographic affinity of seaweeds from Baja California might be helpful in predicting the effects of El Nino and La Nina on their abundance, with implications for resource management and for the prediction of the effects of long-term oceanographic changes on seaweed distribution MH - Canada MH - Mexico|Baja California Sur PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000172659800001 L2 - MEDITERRANEAN-SEA; TAXIFOLIA; TEMPERATURE; GROWTH; ALGAE; MORPHOLOGY; LIGHT; REEF SO - Journal of the Marine Biological Association of the United Kingdom 2001 ;81(5):721-726 4271 UI - 14141 AU - Seba P AU - Rotter I AU - Muller M AU - Persson E AU - Pichugin K AD - Max Planck Inst Phys Complex Syst, D-01187 Dresden, GermanyAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoRotter, I, Max Planck Inst Phys Complex Syst, D-01187 Dresden, Germany TI - Open microwave cavities AB - We study resonances in an open quantum system and in a microwave cavity connected to a waveguide. In both cases, interferences via the continuum of decay channels take place. They cause resonance trapping, which is a separation of time-scales, It appears if the coupling strength gets large enough. The reorganisation of the system is accompanied by an essential biorthogonality of the resonance states. (C) 2001 Elsevier Science B.V. All rights reserved MH - Czech Republic MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000167346200028 L2 - level repulsion;interferences of resonances;open systems;microwave resonances;RESONANCES SO - Physica E-Low-Dimensional Systems & Nanostructures 2001 ;9(3):484-487 4272 UI - 14512 AU - Sebastian PJ AU - Matthews NR AU - Mathew X AU - Pattabi M AU - Turner J AD - UNAM, Energy Res Ctr, Solar Energy Lab, Photovolta Syst Grp, Temixco 62580, Morelos, MexicoNREL, Golden, CO, USASebastian, PJ, UNAM, Energy Res Ctr, Solar Energy Lab, Photovolta Syst Grp, Temixco 62580, Morelos, Mexico TI - Photoelectrochemical characterization of SiC AB - The current-voltage (I-V) studies for p-SiC in KOH and n-SiC in Na2SO3 in a two-electrode configuration indicated that SiC-based photoelectrochemical systems can be a possibility for water splitting. With illumination there is appreciable photocurrent generation at the semiconductor-electrolyte interface, which correspond to water splitting to form hydrogen and oxygen at the respective electrodes. The C-V analysis gave an idea about the hat-band potential and carrier concentration. (C) 2000 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000166366700003 L2 - SiC;KOH;Na2SO3;hydrogen;photoelectrochemical system;SOLAR-CELLS; SINGLE SO - International Journal of Hydrogen Energy 2001 ;26(2):123-125 4273 UI - 13724 AU - Seeger T AU - Redlich P AU - Grobert N AU - Terrones M AU - Walton DRM AU - Kroto HW AU - Ruhle M AD - Max Planck Inst Met Forsch, D-70174 Stuttgart, GermanyUniv Sussex, CPES, Fullerene Sci Ctr, Brighton BN1 9JQ, E Sussex, EnglandUNAM, Lab Juriquilla, Inst Fis, Queretaro 76000, Qro, MexicoSeeger, T, Max Planck Inst Met Forsch, Seestr 92, D-70174 Stuttgart, Germany TI - SiOx-coating of carbon nanotubes at room temperature AB - A room temperature colloidal method for coating carbon nanotubes with silicon oxide is described. For the first time, the morphology, chemical composition and SiOx/C interfaces of the coatings were investigated using state-of-the-art transmission electron microscopy and highly spatially resolved electron energy-loss spectroscopy. The amorphous SiOx coatings are < 10 nm thick. Electron energy-loss fine structure analyses indicate that the SiOx is partly substoichiometric. In addition, coatings were also created by a high-temperature route. However, they tend to be more unstable and defoliate when compared to coatings deposited at room temperature. (C) 2001 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 46 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000168592000007 L2 - ENERGY-LOSS SPECTROSCOPY; PULP FIBERS; TEMPLATES; DEPOSITION; NANORODS; CHARGE SO - Chemical Physics Letters 2001 ;339(1-2):41-46 4274 UI - 14351 AU - Sefrioui Z AU - Arias D AU - Morales F AU - Varela M AU - Leon C AU - Escudero R AU - Santamaria J AD - Univ Complutense Madrid, Dept Fis Aplicada 3, GFMC, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoSefrioui, Z, Univ Complutense Madrid, Dept Fis Aplicada 3, GFMC, E-28040 Madrid, Spain TI - Evidence for vortex tunnel dissipation in deoxygenated YBa2Cu3O6.4 thin films AB - We report on transport and magnetic relaxation measurements of deoxygenated YBa2Cu3O7-delta thin films. Strongly oxygen depleted samples with delta = 0.6 are produced to ensure the pure two-dimensional nature of the vortex system. Linear resistivity shows a temperature dependence according to rho (lin)proportional to exp[-(T-o/T)(p)]. T-o takes a value of 230 +/- 10 K over the whole field range, and p changes from 1 +/- 0.03 at 2 T to 0.70 +/- 0.03 at 8 T. For fields higher than 4 T, dissipation in the linear regime (low current densities) is dominated by quantum variable range hopping (VRH) of vortices. At high current densities and low temperatures, nonlinear dissipation takes place by quantum creep, characterized by a temperature-independent resistivity and by a saturation of the magnetic relaxation rate MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000166820600104 L2 - ULTRATHIN SUPERCONDUCTING FILMS; GLASS PHASE-TRANSITION; QUANTUM CREEP; MAGNETIC-RELAXATION; II SUPERCONDUCTORS; T-G=0 K; VORTICES; TRANSPORT SO - Physical Review B 2001 ;6305(5): 4275 UI - 13988 AU - Segura-Puertas L AU - Ramos ME AU - Aramburo C AU - de la Cotera EPH AU - Burnett JW AD - Univ Maryland, Sch Med, Dept Dermatol, Baltimore, MD 21201, USAUniv Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro, MexicoInst Ciencias Mar & Limnol, Cancun, Q Roo, MexicoBurnett, JW, Univ Maryland, Sch Med, Dept Dermatol, 405 W Redwood St,6th Floor, Baltimore, MD 21201 USA TI - One Linuche mystery solved: All 3 stages of the coronate scyphomedusa Linuche unguiculata cause seabather's eruption AB - Background: Seabather's eruption (SBE) is a highly pruritic dermatosis affecting swimmers and divers in marine waters off Florida, in the Gulf of Mexico, and the Caribbean Sea. Its cause has been attributed to various organisms but recently to the larvae of the schyphomedusa, Linuche unguiculata. Objective: We attempted to determine whether immature and adult Linuche cause SBE. Methods: Episodes of SBE in the Cancun and Cozumel area of the Mexican Caribbean were evaluated during the season of high tourism (January-June). This time corresponds to the moments in the life cycle when the three swimming stages oft unguiculata-ephyrae, medusae, and larvae-can be sequentially observed. Our methods include (1) observations by divers, biologists, and students coinciding with stinging outbreaks and the onset of SBE; (2) serologic evaluation of individuals stung by L unguiculata; and (3) the demonstration of Linuche nematocysts on the affected skin. Results: All 3 swimming Linuche stages can cause SBE. Conclusion: The offending stages of Linuche can be identified by the cutaneous lesion's morphology and the time of year MH - USA MH - Mexico|Quintana Roo MH - Mexico|Queretaro PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 5 U4 - Dermatology U5 - J;Article AV - English IS - 0190-9622 UR - ISI:000167768000010 L2 - ENVENOMATION SO - Journal of the American Academy of Dermatology 2001 ;44(4):624-628 4276 UI - 12989 AU - Seila RL AU - Main HH AU - Arriaga JL AU - Martinez G AU - Ramadan A AD - US EPA, Natl Exposure Res Lab, Res Triangle Pk, NC 27711, USASonoma Technol Inc, Petaluma, CA 94954, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoEgyptian Radiat & Environm Monitoring Network, Cairo, EgyptSeila, RL, US EPA, Natl Exposure Res Lab, Mail Drop 84, Res Triangle Pk, NC 27711 USA TI - Atmospheric volatile organic compound measurements during the 1996 Paso del Norte Ozone Study AB - Ambient air VOC samples were collected at surface air quality monitoring sites, near sources of interest, and aloft on the US (EI Paso) and Mexican (Ciudad Juarez) side of the border during a six-week period of the 1996 Paso del Norte Ozone Study. Samples were collected at five sites, three on the US side and two on the Mexican side, during nine intensive operation days when high ozone levels were forecast for the area. Six other sites were sampled to characterize up-wind, down-wind and other emission sources. Samples for determining source profiles were collected for rush hour traffic, propane-powered bus exhaust. automobile paint shop emissions, propane fuels. and industrial manufacturing in Cd. Juarez and a refinery in El Paso. Most samples were collected in electro-polished stainless steel canisters for determination of C-2 to C10+ hydrocarbons by GC-FID. Carbonyl samples were collected on DNPH impregnated cartridges at three surface sites during aircraft flights and analyzed by HPLC. This paper presents the spatial and temporal characteristics of VOC species concentrations and compositions to examine the differences and similarities of the various locations and time periods, Overall surface, total non-methane hydrocarbon values ranged from 0.1 to 3.4 ppmC with the highest concentrations being recorded in the morning and evening at five vehicle-dominated sites, three in Cd. Juarez and two in El Paso. Toluene in El Paso samples and propane, which is used as a cooking and transportation fuel in Cd. Juarez, were the most abundant hydrocarbons. The most abundant carbonyls were acetaldehyde, acetone and formaldehyde. (C) 2001 Elsevier Science B.V. All rights reserved MH - Egypt MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000170533100010 L2 - carbonyls;Cd. Juarez;El Paso;hydrocarbons;ozone;Paso del Norte ozone study;source profile;VOC;volatile organic compounds;RURAL SITE; NASHVILLE SO - Science of the Total Environment 2001 ;276(1-3):153-169 4277 UI - 14530 AU - Selman M AU - King TE AU - Pardo A AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Calif San Francisco, San Francisco, CA 94143, USASelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502, Mexico City 14080, DF, Mexico TI - Idiopathic pulmonary fibrosis: Prevailing and evolving hypotheses about its pathogenesis and implications for therapy AB - Idiopathic pulmonary fibrosis is a progressive and usually fatal lung disease characterized by fibroblast proliferation and extracellular matrix remodeling, which result in irreversible distortion of the lung's architecture. Although the pathogenetic mechanisms remain to be determined, the prevailing hypothesis holds that fibrosis is preceded and provoked by a chronic inflammatory process that injures the lung and modulates lung fibrogenesis, leading to the end-stage fibrotic scar. However, there is little evidence that inflammation is prominent in early disease, and it is unclear whether inflammation is relevant to the development of the fibrotic process. Evidence suggests that inflammation does not play a pivotal role. Inflammation is not a prominent histopathologic finding, and epithelial injury in the absence of ongoing inflammation is sufficient to stimulate the development of fibrosis. In addition, the inflammatory response to a lung fibrogenic insult is not necessarily related to the fibrotic response. Clinical measurements of inflammation fail to correlate with stage or outcome, and potent anti-inflammatory therapy does not improve outcome. This review presents a growing body of evidence suggesting that idiopathic pulmonary fibrosis involves abnormal wound healing in response to multiple, microscopic sites of ongoing alveolar epithelial injury and activation associated with the formation of patchy fibroblast-myofibroblast foci, which evolve-to fibrosis. Progress in understanding the fibrogenic mechanisms in the lung is likely to yield more effective therapies MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: AMER COLL PHYSICIANS RP - NOT IN FILE U3 - TC 369 U4 - Medicine, General & Internal U5 - J;Review AV - English IS - 0003-4819 UR - ISI:000166356000008 L2 - INTERSTITIAL LUNG-DISEASE; ALVEOLAR EPITHELIAL-CELLS; EPSTEIN-BARR-VIRUS; HIGH-RESOLUTION CT; GROWTH-FACTOR-BETA; OBLITERANS-ORGANIZING PNEUMONIA; CIRCULATING IMMUNE-COMPLEXES; CONTROLLED CLINICAL-TRIAL; BLEOMYCIN HAMSTER MODEL; PRESSURE-VOLUME CURVE SO - Annals of Internal Medicine 2001 ;134(2):136-151 4278 UI - 13371 AU - Semlyen A AU - de Leon F AD - Inst Politecn Nacl, Escuela Super Ingn Mecan & Elect, Mexico City 07738, DF, MexicoUniv Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, CanadaSemlyen, A, Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada TI - Quasi-Newton power flow using partial Jacobian updates AB - We present a quasi-Newton power flow methodology that incorporates several strategies to obtain substantial computing savings. Newton steps are combined with constant Jacobian (or "simple") steps and partial Jacobian updates to get an efficient quasi-Newton method. The methodology proposed includes the possibility of selecting the next best step by measuring the residuals.:Partial Jacobian Updates (PJU) are included in the quasi-Newton power flow using LU factorization updates and/or the Martix Modification Lemma, The method has been tested with systems:ranging in size from 14 to 6372 buses. For large power systems we have obtained savings (in flops) in the order of 50% compared to Newton's method MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000169592700002 L2 - matrix modification lemma;matrix refactorization;Newton power flow;partial Jacobian updates SO - Ieee Transactions on Power Systems 2001 ;16(3):332-339 4279 UI - 12498 AU - Senowbari-Daryan B AU - Stanley GD AU - Gonzalez-Leon C AD - Univ Montana, Dept Geol, Missoula, MT 59812, USAUniv Erlangen Nurnberg, Inst Palaontol, D-91054 Erlangen, GermanyNatl Autonomous Univ Mexico, Estac Reg Noroeste, Inst Geol, Hermosillo 83000, Sonora, MexicoSenowbari-Daryan, B, Univ Montana, Dept Geol, Missoula, MT 59812, USA TI - A new Triassic sponge from the Antimonio terrane, Sonora, Mexico AB - A new Upper Triassic (Norian) chambered sponge, Fanthalamia glomerata n. sp., from the Antimonio Formation (Antimonio terrane) of northwestern Sonora, Mexico, is described. Recrystallized limestone containing the new sponge, together with other marine invertebrates, is interpreted to represent tropical, shallow-water carbonate settings characterized by local biostromal and biohermal buildups. The new species increases understanding of the ancient depositional environment and paleobiogeography of the Antimonio Formation. (C) 2001 Published by Elsevier Science Ltd MH - Germany MH - Mexico|Sonora MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000171888900003 L2 - recrystallized limestone;Antimonio Formation;Fanthalamia glomerata;THALAMID SPONGES SO - Journal of South American Earth Sciences 2001 ;14(5):447-452 4280 UI - 14017 AU - Senties A AU - Fujii MT AU - Rodriguez D AD - Univ Autonoma Metropolitana Iztapalapa, Dpto Hidrobiol, Mexico City 09340, DF, MexicoInst Bot, Secao Ficol, BR-01061970 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Fac Ciencias, Lab Ficol, Coyoacan 04510, DF, MexicoSenties, A, Univ Autonoma Metropolitana Iztapalapa, Dpto Hidrobiol, AP 55-535, Mexico City 09340, DF, Mexico TI - Laurencia venusta (Ceramiales, Rhodophyta): a new record from the Atlantic Ocean AB - Laurencia venusta Yamada, originally described from the western Pacific Ocean, is recorded for the first time from the Atlantic Ocean. It occurs in Quintana Roo State, Mexico, which is located on the eastern portion of Yucatan Peninsula, Caribbean Sea. The present species belongs;to the subgenus Laurencia by-nature of possessing four pericentral cells per vegetative axial segment, secondary pit-connections between superficial cortical cells, and parallel-type arrangement of the tetrasporangia. The principal characteristics for species identification are: pale green color, soft and flaccid thalli, verticillate branching, and the presence of lenticular thickenings in the walls of medullary cells MH - Brazil MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000167826000001 L2 - SP-NOV; RHODOMELACEAE; SEA SO - Botanica Marina 2001 ;44(2):95-99 4281 UI - 11542 AU - Serkin VN AU - Belyaeva TL AD - Russian Acad Sci, Inst Gen Phys, Moscow 119991, RussiaMoscow MV Lomonosov State Univ, DV Skobeltsyn Sci Res Inst Nucl Phys, Moscow 119899, RussiaSerkin, VN, Benemerita Univ Autonoma Puebla, Inst Ciencias, AP 502, Puebla 72001, Mexico TI - Optimal control of optical soliton parameters: Part 1. The Lax representation in the problem of soliton management AB - The existence of the Lax representation for a model of soliton management under certain conditions is shown, which proves a complete integrability of the model. The exact analytic solutions are obtained for the problem of the optimal control of parameters of Schrodinger solitons in nonconservative systems with the group velocity dispersion, nonlinear refractive index, and gain (absorption coefficient) varying over the length. The examples demonstrating the non-trivial amplification dynamics of optical solitons, which are important from practical point of view, are considered. The exact analytic solutions are obtained for problems of the optimal amplification of solitons in optical fibres with monotonically decreasing dispersion and of Raman pumping of solitons in fibreoptic communication systems MH - Mexico|Puebla MH - Russia PB - LETCHWORTH: TURPION LTD RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 1063-7818 UR - ISI:000174511500013 L2 - optical solitons;nonlinear waves;soliton management;SCHRODINGER-EQUATION MODEL; DISPERSION; FIBER SO - Quantum Electronics 2001 ;31(11):1007-1015 4282 UI - 11543 AU - Serkin VN AU - Belyaeva TL AD - Russian Acad Sci, Inst Gen Phys, Moscow 119991, RussiaMoscow MV Lomonosov State Univ, DV Skobeltsyn Sci Res Inst Nucl Phys, Moscow 119899, RussiaSerkin, VN, Benemerita Univ Autonoma Puebla, Inst Ciencias, AP 502, Puebla 72001, Mexico TI - Optimal control of optical soliton parameters: Part 2. Concept of nonlinear Bloch waves in the problem of soliton management AB - It is shown that optical solitons in nonlinear fibreoptic communication systems and soliton lasers can be represented as nonlinear Bloch waves in periodic structures. The Bloch theorem is proved for solitons; of the nonlinear Schrodinger equation in systems with the dispersion, the nonlinearity, and the gain (absorption coefficient) periodically changing over the length. The dynamics of formation and interaction, as well as stability of the coupled states of nonlinear Bloch waves are investigated. It is shown that soliton Bloch waves exist only under certain self-matching conditions for the basic parameters of the system and reveal a structural instability with respect to the mismatch between the periods of spatial modulation of the dispersion, nonlinearity or gain MH - Mexico|Puebla MH - Russia PB - LETCHWORTH: TURPION LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 1063-7818 UR - ISI:000174511500014 L2 - optical solitons;nonlinear waves;soliton management;TI-SAPPHIRE LASER; PULSE-PROPAGATION; QUASI-SOLITON; MODE-LOCKING; FIBER LINKS; DISPERSION SO - Quantum Electronics 2001 ;31(11):1016-1022 4283 UI - 11853 AU - Serkin VN AU - Belyaeva TL AD - Russian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaBenemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72001, MexicoMoscow MV Lomonosov State Univ, Moscow 119899, RussiaSerkin, VN, Russian Acad Sci, Inst Gen Phys, 38 Vavilov St, Moscow 117942, Russia TI - High-energy optical Schrodinger solitons AB - The conditions for the existence of a Lax pair were determined and exact analytic solutions to the nonlinear evolution equations of the Schrodinger type with complex and nonuniform potentials were found. In particular, these solutions provide a basis for the soliton management concept in applied problems and solve the problems of optimal energy accumulation by a Schrodinger soliton in an active medium and soliton amplification in optical fiber communication lines and soliton lasers. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0021-3640 UR - ISI:000173734200002 L2 - EQUATION MODEL; DISPERSION SO - Jetp Letters 2001 ;74(12):573-577 4284 UI - 12954 AU - Serkin VN AU - Matsumoto M AU - Belyaeva TL AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72001, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaOsaka Univ, Dept Commun Engn, Suita, Osaka 5650871, JapanMoscow MV Lomonosov State Univ, Moscow 119899, RussiaSerkin, VN, Benemerita Univ Autonoma Puebla, Inst Ciencias, AP 502, Puebla 72001, Mexico TI - Bright and dark solitary nonlinear Bloch waves in dispersion managed fiber systems and soliton lasers AB - The nonlinear Bloch theorem for the fundamental and higher-order Schrodinger solitons in periodic dispersive and nonlinear structures has been proven. It is shown that bright and dark solitary nonlinear Bloch waves exist only under certain conditions and that the parameters describing dispersion and nonlinearity periodic inhomogeneities cannot be chosen independently. The formation, interaction and stability of the fundamental and higher-order solitary nonlinear Bloch waves have been investigated. (C) 2001 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Puebla MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000170722200019 L2 - physics of solitons;nonlinear fiber optics;nonlinear Bloch waves;dispersion managed solitons;soliton based communications;soliton lasers;OPTICAL FIBERS; PULSE-PROPAGATION; QUASI-SOLITON SO - Optics Communications 2001 ;196(1-6):159-171 4285 UI - 13501 AU - Serkin VN AU - Chapela VM AU - Percino J AU - Belyaeva TL AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72001, Pue, MexicoMoscow MV Lomonosov State Univ, Moscow 119899, RussiaSerkin, VN, Benemerita Univ Autonoma Puebla, Inst Ciencias, Apdo Postal 502, Puebla 72001, Pue, Mexico TI - Nonlinear tunneling of temporal and spatial optical solitons through organic thin films and polymeric waveguides AB - Nonlinear optical organic materials will be the key elements for future high-bit-rate telecommunications and ultrafast photonic technologies. We show that the process of nonlinear tunneling of optical solitons through a strong nonlinear thin film barrier, for example, a nonlinear organic thin film barrier, exhibits jump-like nonadiabatic evolution, which eventually leads to the soliton "fission reactions". Nonlinear "fission reaction" is attended by generation of "colored" solitons with different frequencies and group velocities. It seems very attractive to use the nonlinear soliton tunneling effect through thin film of polydiacetylene para-toluene sulfonate in developing a whole class of basically novel all-optical soliton logic devices. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Puebla MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000169163000014 L2 - nonlinear soliton tunneling;soliton logic;ultrafast all-optical switching;MOLECULAR SUSCEPTIBILITIES; CONJUGATED POLYMER; PHYSICAL LIMITS; POLYDIACETYLENE; PULSES SO - Optics Communications 2001 ;192(3-6):237-244 4286 UI - 14187 AU - Serkin VN AU - Matsumoto M AU - Belyaeva TL AD - Russian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaBenemerita Univ Autonoma Puebla, Puebla 72001, MexicoOsaka Univ, Osaka 5650871, JapanMoscow MV Lomonosov State Univ, Moscow 119899, RussiaSerkin, VN, Russian Acad Sci, Inst Gen Phys, Ul Vavilova 39, Moscow 117942, Russia TI - Nonlinear Bloch waves AB - The nonlinear Bloch theorem for the temporal and spatial Schrodinger solitons in dispersive and nonlinear periodic structures is proved. It is shown that bright and dark solitary nonlinear Bloch waves exist only under certain conditions and that the parameter functions describing dispersion and nonlinearity periodic inhomogeneities cannot be chosen independently. (C) 2001 MAIK "Nauka/Interperiodica" MH - Japan MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0021-3640 UR - ISI:000167333800003 L2 - SOLITONS SO - Jetp Letters 2001 ;73(2):59-62 4287 UI - 12731 AU - Serruys PW AU - Morice MC AU - Sousa JE AU - Fajadet J AU - Perin M AU - Ben Hayashi E AU - Colombo A AU - Schuler G AU - Barragan P AU - Bode C AD - Acad Hosp Rotterdam Dijkzigt, Thoraxctr, NL-3000 DR Rotterdam, NetherlandsInst Cardiovasc Paris Sud, Dept Cardiol, Massy, FranceInst Dante Pazzanese Cardiol, Dept Intervent Cardiol, Sao Paulo, BrazilClin Pasteur, Dept Cardiol, Toulouse, FranceIncor Heart Inst, Sector Hemodinam, Sao Paulo, BrazilInst Nacl Ignacio Chavez, Dept Cardiol, Mexico City, DF, MexicoCtr Cuore Columbus, Dept Cardiol, Milan, ItalyHerzzentrum Leipzig, Dept Cardiol, Leipzig, GermanyCtr Hosp Prive Beauregard, Ctr Cardiovasc, Marseille, FranceUniv Freiburg, Med Klin, Kardiol Angiol Abt, D-7800 Freiburg, Germany TI - The RAVEL study: a randomized study with the sirolimus coated Bx velocity balloon-expandable stent in the treatment of patients with de novo native coronary artery lesions MH - Brazil MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Netherlands PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 3 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000170988301852 SO - European Heart Journal 2001 ;22():484-+ 4288 UI - 11693 AU - Servin J AU - Lindsey SL AU - Loiselle BA AD - Depto Fauna Silvestre, AC Ctr Reg Durango, Inst Ecol, Durango 34100, Dgo, MexicoUniv Washington, Wild Canid Survival & Res Ctr, Eureka, MO 63025, USAUniv Missouri, Int Ctr Trop Ecol, St Louis, MO 63121, USAServin, J, Depto Fauna Silvestre, AC Ctr Reg Durango, Inst Ecol, Apdo Postal 632 CP, Durango 34100, Dgo, Mexico TI - Pileated Woodpecker scavenges on a carcass in Missouri AB - An observation of opportunistic scavenging by a female Pileated Woodpeeker (Dryocopus pileatus) in Missouri is reported, The bird visited a captive wolf enclosure and tore cartilage and muscle from a large fresh beef bone and Consumed it immediately, The Pileated Woodpeeker vigilantly observed the resident wolves during hot foraging and left the enclosure at their approach, This is thought to be the first observation of a Pileated Woodpecker scavenging meat in such a fashion MH - Mexico|Durango MH - USA PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000174053600018 SO - Wilson Bulletin 2001 ;113(2):249-250 4289 UI - 12079 AU - Servin M AU - Quiroga JA AU - Cuevas FJ AD - Ctr Invest Opt AC, Guanajuato 37150, MexicoUniv Complutense Madrid, Dept Opt, E-28040 Madrid, SpainServin, M, Ctr Invest Opt AC, Apartado Postal 1-948, Guanajuato 37150, Mexico TI - Demodulation of carrier fringe patterns by the use of non-recursive digital phase locked loop AB - First- and second-order recursive Digital Phase Locked Loops (DPLLs) have been used recently in fringe data processing because it is the fastest way to obtain the unwrapped phase of a carrier frequency fringe pattern due to its minimal computational overhead. Nevertheless these simple DPLLs cannot cope with fringes having high noise and very wide band phase modulation. In this work we present a highly improved DPLL. The system presented is a nonrecursive DPLL which is far more robust than previously presented recursive DPLL. The advantage of this newer technique with respect to recursive DPLL is its higher gain in the signal to noise ratio on the detected phase and higher stability. Unfortunately this is obtained at a higher computational cost. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000172986600009 L2 - image processing in optics;phase retrieval;optical testing;TRACKING TECHNIQUE SO - Optics Communications 2001 ;200(1-6):87-97 4290 UI - 14482 AU - Seyda A AU - Newbold RF AU - Hudson TJ AU - Verner A AU - MacKay N AU - Winter S AU - Feigenbaum A AU - Malaney S AU - Gonzalez-Halphen D AU - Cuthbert AP AU - Robinson BH AD - Hosp Sick Children, Res Inst, Metab Dis Programme, Toronto, ON M5G 1X8, CanadaHosp Sick Children, Div Clin Genet, Toronto, ON M5G 1X8, CanadaUniv Toronto, Dept Biochem, Toronto, ON, CanadaUniv Toronto, Dept Paediat, Toronto, ON M5S 1A1, CanadaBrunel Univ, Dept Biol & Biochem, Uxbridge UB8 3PH, Middx, EnglandMontreal Gen Hosp, Montreal, PQ H3G 1A4, CanadaValley Childrens Hosp, Fresno, CA, USASt Vincents Hosp, Garvan Inst Med Res, Darlinghurst, NSW 2010, AustraliaUniv Nacl Autonoma Mexico, Dept Bioenerget, Mexico City 04510, DF, MexicoGuys Hosp, Guys Kings & St Thomas Sch Med, Div Med & Mol Genet, London SE1 9RT, EnglandRobinson, BH, Hosp Sick Children, Res Inst, Metab Dis Programme, 555 Univ Ave, Toronto, ON M5G 1X8, Canada TI - A novel syndrome affecting multiple mitochondrial functions, located by microcell-mediated transfer to chromosome 2p14-2p13 AB - We have studied cultured skin fibroblasts from three siblings and one unrelated individual, all of whom had fatal mitochondrial disease manifesting soon after birth. After incubation with 1 mM glucose, these four cell strains exhibited lactate/pyruvate ratios that were six times greater than those of controls. On further analysis, enzymatic activities of the pyruvate dehydrogenase complex, the 2-oxoglutarate dehydrogenase complex, NADH cytochrome c reductase, succinate dehydrogenase, and succinate cytochrome c reductase were severely deficient. In two of the siblings the enzymatic activity of cytochrome oxidase was mildly decreased (by similar to 50%). Metabolite analysis performed on urine samples taken from these patients revealed high levels of glycine, leucine, valine, and isoleucine, indicating abnormalities of both the glycine-cleavage system and branched-chain alpha -ketoacid dehydrogenase. In contrast, the activities of fibroblast pyruvate carboxylase, mitochondrial aconitase, and citrate synthase were normal. Immunoblot analysis of selected complex III subunits (core 1, cyt c(1), and iron-sulfur protein) and of the pyruvate dehydrogenase complex subunits revealed no visible changes in the levels of all examined proteins, decreasing the possibility that an import and/or assembly factor is involved. To elucidate the underlying molecular defect, analysis of microcell-mediated chromosome-fusion was performed between the present study's fibroblasts (recipients) and a panel of A9 mouse: human hybrids (donors) developed by Cuthbert et al. (1995). Complementation was observed between the recipient cells from both families and the mouse: human hybrid clone carrying human chromosome 2. These results indicate that the underlying defect in our patients is under the control of a nuclear gene, the locus of which is on chromosome 2. A 5-cM interval has been identified as potentially containing the critical region for the unknown gene. This interval maps to region 2p14-2p13 MH - Australia MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000166524800009 L2 - CYTOCHROME BC(1) COMPLEX; CONGENITAL LACTIC-ACIDOSIS; RESPIRATORY-CHAIN DEFECTS; SKIN FIBROBLAST-CULTURES; OXIDASE DEFICIENCY; I DEFICIENCY; C-REDUCTASE; DEHYDROGENASE; DISEASE; MECHANISMS SO - American Journal of Human Genetics 2001 ;68(2):386-396 4291 UI - 12683 AU - Shailendra AU - Bharti N AU - Garza MTG AU - Cruz-Vega DE AU - Garza JC AU - Saleem K AU - Naqvi F AU - Azam A AD - Jamia Millia Islamia, Dept Chem, New Delhi 110025, IndiaIMSS, Ctr Invest Biomed Noreste, Div Biol Celular & Mol, Monterrey, NL, MexicoAzam, A, Jamia Millia Islamia, Dept Chem, New Delhi 110025, India TI - Synthesis, characterisation and antiamoebic activity of new thiophene-2-carboxaldehyde thiosemicarbazone derivatives and their cyclooctadiene Ru(II) complexes AB - Reaction of new thiosemicarbazones. (1-4) derived from thiophene-2-carboxaldehyde and cycloalkylaminothiocarbonylhydrazine with [Ru(eta (4)-C8H12)(CH3CN)(2)Cl-2] leads to form complexes (1a-4a) of the typed [Ru(eta (4)-C8H12)(TSC)Cl-2] (where TSC=thiosemicarbazone). All the compounds have been characterised by elemental analysis, IR, H-1 NMR, electronic spectra and thermogravimetric analysis. It is concluded that the thionic sulphur and the azomethine nitrogen atom of the ligands are bonded to the metal ion. In vitro antiamoebic screening against (HK-9) strain of Entamoeba histolytica indicated that the Ru(II) complexes of thiophene-2-carboxaldehyde thiosemicarbazones were found more active than the thiosemicarbazones. (C) 2001 Elsevier Science Ltd. All rights reserved MH - India MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Medicinal;Chemistry, Organic U5 - J;Article AV - English IS - 0960-894X UR - ISI:000171503300003 L2 - METAL-BASED CHEMOTHERAPY; ANTIMALARIAL ACTIVITY; CYTOTOXIC ACTIVITY; TROPICAL DISEASES; RUTHENIUM; AGENTS; 2-ACETYLPYRIDINE; NITROIMIDAZOLES; COPPER(II); PD(II) SO - Bioorganic & Medicinal Chemistry Letters 2001 ;11(20):2675-2678 4292 UI - 12135 AU - Shapiro NM AU - Singh SK AU - Almora D AU - Ayala M AD - Natl Autonomous Univ Mexico, Inst Geofis, CU, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Ingn, CU, Mexico City 04510, DF, MexicoShapiro, NM, Univ Colorado, Dept Phys, Campus Box 390, Boulder, CO 80309 USA TI - Evidence of the dominance of higher-mode surface waves in the lake-bed zone of the Valley of Mexico AB - We compare ground motions recorded at the surface and in boreholes at five different locations of the lake-bed zone of the Valley of Mexico with theoretical dispersion curves and eigenfunctions calculated for the first two modes of Rayleigh and Love waves. We find that (1) the maximum in the horizontal-to-vertical displacement ratio, which occurs at the dominant frequency of the site (0.4 Hz), corresponds to the higher mode rather than to the fundamental mode of the Rayleigh waves, (2) borehole records at depths from 0 to 100 m show that the normalized vertical displacement does not decrease rapidly below the superficial clay layer, as should be the case for the fundamental mode, but remains approximate to 0.8, and (3) the measured phase velocity at a period of about 2.5 s (2.0 +/- 0.5 km s(-1)) is too fast for the fundamental mode predicted for the known crustal velocity structure. These observations lead us to conclude that the wavefield in the lakebed zone in Mexico City is dominated by higher-mode surface waves. This provides a plausible explanation for the long duration of the coda in the lake-bed zone. Although shear wave Q is very small (10-20) in the clay layer, the higher modes of surface waves do not propagate in the superficial clay layer but in the underlying structure where Q-values are likely to be relatively high. Thus, while the clay layer plays the passive role of amplifying the ground motion, its contribution in damping out the motion is insignificant. The results have two important practical implications. (1) The strain estimate from recorded ground velocity differs significantly for the fundamental mode as compared to the higher-mode surface waves. (2) If the ground motion is dominated by the fundamental mode, then knowledge of the superficial layer and the velocity contrast with the underlying structure is sufficient for understanding and modelling of the ground motion. If, however, the higher-mode surface waves dominate, then a detailed knowledge of the deeper structure is required MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000172903700003 L2 - higher nodes;strong motion duration;surface waves;Valley of Mexico;DYNAMIC DEFORMATIONS; SHALLOW SEDIMENTS; 1985 MICHOACAN; GROUND MOTION; LONG-DURATION; PROPAGATION; CITY; AMPLIFICATION; EARTHQUAKE; INCLUSION SO - Geophysical Journal International 2001 ;147(3):517-527 4293 UI - 12858 AU - Shapovalova AI AU - Burenkov AN AU - Carrasco L AU - Chavushyan VH AU - Doroshenko VT AU - Dumont AM AU - Lyuty VM AU - Valdes JR AU - Vlasuyk VV AU - Bochkarev NG AU - Collin S AU - Legrand F AU - Mikhailov VP AU - Spiridonova OI AU - Kurtanidze O AU - Nikolashvili MG AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachaevo Cher, RussiaUNAM, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoMoscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119899, RussiaObserv Paris, DAEC, F-92195 Meudon, FranceGeorgian AS, Abastumani Astrophys Observ, GE-383762 Abastumani, Rep of GeorgiaIsaac Newton Inst Chile, SAO Branch, Santiago, ChileCarrasco, L, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51, Puebla 72000, Mexico TI - Intermediate resolution H beta spectroscopy and photometric monitoring of 3C 390.3 - I. Further evidence of a nuclear accretion disk AB - We have monitored the AGN 3C 390.3 between 1995 and 2000. A historical B-band light curve dating back to 1966 shows a large increase in brightness during 1970-1971, followed by a gradual decrease down to a minimum in 1982. During the 1995-2000 lapse the broad H beta emission and the continuum flux varied by a factor of approximate to 3. Two large amplitude outbursts, of different duration, in continuum and H beta light were observed i.e.: in October 1994 a brighter are that lasted approximate to 1000 days and in July 1997 another one that lasted approximate to 700 days were detected. The response time lag of the emission lines relative to flux changes of the continuum has been found to vary with time i.e. during 1995{1997 a lag of about 100 days is evident, while during 1998-1999 a double valued lag of approximate to 100 days and approximate to 35 days is present in our data. The flux in the H beta wings and line core vary simultaneously, a behavior indicative of predominantly circular motions in the BLR. Important changes of the H beta emission profiles were detected: at times, we found profiles with prominent asymmetric wings, like those normaly seen in Sy1s, while at other times, we observe profiles with weak, almost symmetrical wings, similar to those of Sy1.8s. We further dismiss the hypothesis that the double peaked H beta profiles in this object originate in a massive binary BH. Instead, we found that the radial velocity difference between the red and blue bumps is anticorrelated with the light curves of H beta and continuum radiation. This implies that the zone that contributes most of the energy to the emitted line changes in radius within the disk. The velocity difference increases, corresponding to smaller radii, as the continuum flux decreases. When the continuum flux increases the hump velocity difference decreases. These transient phenomena are expected to result from the variable accretion rate close to the central source. The optical continuum and the H beta flux variations might be related to changes in X-ray emission modulated by a variable accretion rate, changing the surface temperature of the disk, as a result of a variable X-ray irradiation (Ulrich 2000). Theoretical H beta profiles were computed for an accretion disk, the observed profiles are best reproduced by an inclined disk (25 degrees) whose region of maximum emission is located roughly at 200 R-g. The mass of the black hole in 3C 390.3, estimated from the reverberation analysis is M-rev approximate to 2.1 x 10(9) M-., 5 times larger than previous estimates (Wandel et al. 1999) MH - Chile MH - France MH - Mexico|Baja California MH - Mexico|Puebla MH - Rep of Georgia MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 1432-0746 UR - ISI:000171087200008 L2 - galaxies : active;galaxies : Seyfert;galaxies : individual (3C 390.3);line : profiles;ACTIVE GALACTIC NUCLEI; BROAD-LINE REGION; SHORT-TIMESCALE VARIABILITY; SEYFERT-GALAXY NGC-5548; EMISSION-LINE; RADIO GALAXY; MULTIWAVELENGTH OBSERVATIONS; X-RAY; CONTINUUM EMISSION; ULTRAVIOLET OBSERVATIONS SO - Astronomy & Astrophysics 2001 ;376(3):775-792 4294 UI - 13392 AU - Sharon E AU - Bar-Eyal M AU - Chet I AU - Herrera-Estrella A AU - Kleifeld O AU - Spiegel Y AD - Agr Res Org, Volcani Ctr, Dept Nematol, IL-50250 Bet Dagan, IsraelHebrew Univ Jerusalem, Fac Agr Food & Environm Qual Sci, Otto Warburg Ctr Agr Biotechnol, IL-76100 Rehovot, IsraelCtr Invest & Estudios Avanzados, Plant Biotechnol & Genet Engn Unit, Irapuato, Gto, MexicoMycontrol Ltd, Alon Hagalil, IsraelSharon, E, Agr Res Org, Volcani Ctr, Dept Nematol, POB 6, IL-50250 Bet Dagan, Israel TI - Biological control of the root-knot nematode Meloidogyne javanica by Trichoderma harzianum AB - The fungal biocontrol agent, Trichoderma harzianum, was evaluated for its potential to control the root-knot nematode Meloidogyne javanica. In greenhouse experiments, root galling was reduced and top fresh weight increased in nematode-infected tomatoes following soil pretreatment with Trichoderma peat-bran preparations, The use of a proteinase Prb1-transformed line (P-2) that contains multiple copies of this gene improved biocontrol activity in the greenhouse experiments compared with the nontransformed wild-type strain (WT). AH the Trichoderma strains showed the ability to colonize M, javanica-separated eggs and second-stage juveniles (J2) in sterile in vitro assays, whereas P-2 also penetrated the egg masses. This protease-transformed line presented the same nematicidal and overall proteolytic activity as the WT in in vitro tests in which concentrated soil extracts from Trichoderma-treated soils immobilized the infective J2. However, the J2 immobilization and proteolytic activities of both P-2 and the WT were higher than those obtained with strain T-203. Characterization of the activity of all Trichoderma strains soil extracts on J2 showed that it was heat resistant and restricted to the low-molecular-weight fraction (less than 3 kDa). It is suggested that improved proteolytic activity of the antagonist may be important for the biological control of the nematodes MH - Israel MH - Mexico|Guanajuato PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000169538900012 L2 - plant-parasitic nematodes;PROTEINASE-ENCODING GENE; BIOCONTROL ACTIVITY; PROTEASE; GROWTH; EGGS; EXPRESSION; PARASITISM; INFECTION; PLANTS; PRB1 SO - Phytopathology 2001 ;91(7):687-693 4295 UI - 12345 AU - Sharp PJ AU - Johnston S AU - Brown G AU - McIntosh RA AU - Pallotta M AU - Carter M AU - Bariana HS AU - Khartkar S AU - Lagudah ES AU - Singh RP AU - Khairallah M AU - Potter R AU - Jones MGK AD - Univ Sydney, Plant Breeding Inst, Camden, NSW 2570, AustraliaUniv Adelaide, Dept Plant Sci, Glen Osmond, SA 5064, AustraliaMurdoch Univ, State Agr Biotechnol Ctr, Perth, WA 6150, AustraliaCIMMYT, Mexico City 06600, DF, MexicoCooperat Res Ctr Qual Wheat Prod & Proc, N Ryde, NSW 1670, AustraliaCSIRO Plant Ind, Canberra, ACT 2601, AustraliaSharp, PJ, Univ Sydney, Plant Breeding Inst, PMB 11, Camden, NSW 2570, Australia TI - Validation of molecular markers for wheat breeding AB - Five sets of markers were assessed for their usefulness in breeding, two linked to wheat stem rust gene Sr2, several markers linked to a chromosome segment conferring Yr17/Lr37/Sr38 resistance, two reported markers for the linked genes Lr35 and Sr39, one for Lr28, and one linked to flour colour. The gene for Sr2 confers adult plant resistance to stem rust (Puccinia graminis f. sp. tritici) and was originally transferred to bread wheat from the tetraploid emmer ('Yaroslav') to the cultivars Hope and H-44. The gene is located on the short arm of chromosome 3B and confers a durable adult plant resistance to stem rust usually expressed only in the field. The chromosome segment carrying the Lr37, Sr38, Yr17 resistance genes is located on 2AS and was originally introduced into wheat through an Aegilops ventricosa x Triticum persicum cross, followed by a cross to the cultivar Marne (VPM1). The flour colour quantitative trait locus was originally described in a Yarralinka x Schomburg cross and is located on chromosome 7A. The primers as originally developed required optimisation for more routine use in a breeding program MH - Australia MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 19 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0004-9409 UR - ISI:000172273500026 L2 - Sr2;flour colour;VPM1;rust resistances;breeding;marker validation;LEAF RUST RESISTANCE; PUCCINIA-RECONDITA-TRITICI; COMPLEMENTARY GENES; STEM RUST; AESTIVUM; IDENTIFICATION SO - Australian Journal of Agricultural Research 2001 ;52(11-12):1357-1366 4296 UI - 13632 AU - Shepherd DS AU - Claussen MJ AU - Kurtz SE AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoShepherd, DS, Natl Radio Astron Observ, POB 0, Socorro, NM 87801, USA TI - Evidence for a solar system-size accretion disk around the massive protostar G192.16-3.82 AB - Seven-millimeter continuum observations of a massive bipolar outflow source, (;G192.16-3.82, were made at a milli-arc-second. resolution with a; capability that Links the National Radio Astronomy Observatory's Very Large Array radio interferometer with the Very Long Baseline Array antenna, Located in Pie Town, New Mexico. The observations provide evidence for a true accretion disk that is about the size of our solar system and located around a massive star. A model of the radio emission suggests the presence of a binary protostellar system, The primary protostar, G192 S1, at the center of the outflow, with a protostar mass of about 8 to 10 times the solar mass, is surrounded by an accretion disk with a diameter of 130 astronomical units (AU). The mass of the disk is on the order of the protostar mass. The outflow is poorly collimated with a full opening angle of about 40 degrees; there is no indication of a more highly collimated jetlike component. The companion source, G192 S2, is Located 80 AU north of the primary source MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 49 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000168963800035 L2 - YOUNG STELLAR OBJECTS; STAR-FORMATION; MOLECULAR OUTFLOW; H2O MASERS; JET; IRAS-20126+4104; EVOLUTION; EMISSION; CLOUD; FLUX SO - Science 2001 ;292(5521):1513-1518 4297 UI - 14725 AU - Sheppard CJR AU - Aguilar F AD - Univ Sydney, Sch Phys, Dept Phys Opt, Sydney, NSW 2006, AustraliaUniv Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, AustraliaINAOE, Puebla 72000, MexicoSheppard, CJR, Univ Sydney, Sch Phys, Dept Phys Opt, Sydney, NSW 2006, Australia TI - Evanescent fields do contribute to the far field (1999, J. mod. Optics, 46, 729) AB - In a series of papers, Xiao has described a decomposition of the electric field of an electric dipole into homogeneous and evanescent components. Although the decomposition may be formally correct, the components do not correspond with the usual homogeneous and evanescent components, and the conclusions made about resolution of near-field and conventional microscopy are misleading MH - Australia MH - Mexico|Puebla PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Editorial Material AV - English IS - 0950-0340 UR - ISI:000165842500016 L2 - PARAXIAL APPROXIMATION; GAUSSIAN BEAMS; MICROSCOPY; RESOLUTION; WAVES SO - Journal of Modern Optics 2001 ;48(1):177-180 4298 UI - 14194 AU - Shirai K AU - Guerrero I AU - Huerta S AU - Saucedo G AU - Castillo A AU - Gonzalez RO AU - Hall GM AD - Univ Autonoma Metropolitana, Dept Biotecnol, Vicentina 09340, DF, MexicoUniv Autonoma Metropolitana, Dept Matemat, Vicentina 09340, DF, MexicoUniv Loughborough, Dept Chem Engn, Loughborough, Leics, EnglandShirai, K, Univ Autonoma Metropolitana, Dept Biotecnol, Av Michocan & Purisima S-N Col, Vicentina 09340, DF, Mexico TI - Effect of initial glucose concentration and inoculation level of lactic acid bacteria in shrimp waste ensilation AB - Fermentation conditions and microorganisms were determined, based on acid production, glucose concentration as carbohydrate source. Inoculation levels to obtain a stable shrimp waste silage were also determined. Shrimp waste ensilation was an efficient method of preservation, allowing the recovery of chitin and another added-value products such as pigments, proteins and enzymes. From the various lactic acid bacteria tested, Lactobacillus pentosus and Lactobacillus sp. (B2) were the best lactic acid producers, although small quantities of acetic acid were detected in samples inoculated with Lactobacillus pentosus. Therefore B2 was chosen for the analysis of glucose consumption as well as for the determination of optimum inoculation levels. The best results were obtained at 10% (w/w wet basis) and 5% (v/w wet basis) respectively. Presence of starters and initial glucose concentration were critical factors in the fermentation of shrimp waste. High initial glucose and starter concentrations reduced the time and increased the amount of lactic acid produced. The fermentation pattern changed during ensilation from hetero to homofermentative. Shrimp waste ensilation prevented the growth of spoilage microorganisms keeping their microbial counts steady and pH values within the acid region. (C) 2001 Elsevier Science Inc. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 20 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-0229 UR - ISI:000167268800023 L2 - shrimp wastes;response surfaces;lactic acid fermentation;chitin;protein;CHITIN; FERMENTATION SO - Enzyme and Microbial Technology 2001 ;28(4-5):446-452 4299 UI - 14050 AU - Shumilin E AU - Paez-Osuna F AU - Green-Ruiz C AU - Sapozhnikov D AU - Rodriguez-Meza GD AU - Godinez-Orta L AD - CICIMAR, Natl Polytech Inst, Interdisciplinary Ctr Marine Sci, La Paz 23096, Baja California, MexicoNatl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Mazatlan Stn, Mazatlan 82000, Sinalao, MexicoVI Vernadskii Inst Geochem & Analyt Chem, Moscow 117975, RussiaShumilin, E, CICIMAR, Natl Polytech Inst, Interdisciplinary Ctr Marine Sci, Av IPN,S-N,Col Playa Palo Santa Rita,POB 592, La Paz 23096, Baja California, Mexico TI - Arsenic, antimony, selenium and other trace elements in sediments of the La Paz Lagoon, Peninsula of Baja California, Mexico MH - Mexico|Baja California MH - Mexico|Sinaloa MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 22 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000167700400012 L2 - COAST SO - Marine Pollution Bulletin 2001 ;42(3):174-178 4300 UI - 13508 AU - Sicilia E AU - De Luca G AU - Chiodo S AU - Russo N AU - Calaminici P AU - Koster AM AU - Jug K AD - Univ Calabria, Dipartimento Chim, I-87037 Arcavacata Di Rende, CS, ItalyUniv Hannover, D-30167 Hannover, GermanyInst Politecn Nacl, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoRusso, N, Univ Calabria, Dipartimento Chim, I-87037 Arcavacata Di Rende, CS, Italy TI - Density functional theory calculations of nuclear quadrupole coupling constants with calibrated N-14 quadrupole moments AB - Density functional calculations of the electric field gradient tensor at the nitrogen nucleus in 13 test molecules, containing 14 nitrogen sites, have been performed using the linear combination of Gaussian-type orbital Kohn-Sham density functional theory (LCGTO-KSDFT) approach. Local and gradient corrected functionals were used for all-electron calculations. All the molecular structures were optimized at their respective levels of theory with extended basis sets. Calibrated N-14 nuclear quadrupole moments were obtained through a fitting procedure between calculated electric field gradients and experimental nuclear quadrupole coupling constants of the test set of molecules for each basis set and functional considered. With these calibrated N-14 nuclear quadrupole moments, the nuclear quadrupole coupling constants of the following selected systems were determined: fluoromethylisonitrile, pyridine, pyrrole, imadazole, pyrazole, 1,8-bis(dimethyl-amino)naphthalene, cyclotetramethylenetetranitramine, cocaine and heroin MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000169229300006 L2 - CARTESIAN GAUSSIAN FUNCTIONS; ELEMENT MCHF CALCULATIONS; MICROWAVE-SPECTRUM; EQUILIBRIUM GEOMETRIES; HYPERFINE-STRUCTURE; ROTATIONAL SPECTRA; CORRELATION-ENERGY; B3LYP CALCULATION; EXCHANGE-ENERGY; ONE-ELECTRON SO - Molecular Physics 2001 ;99(12):1039-1051 4301 UI - 14177 AU - Siddiqa A AU - Sims-Mourtada JC AU - Guzman-Rojas L AU - Rangel R AU - Guret C AU - Madrid-Marina V AU - Sun Y AU - Martinez-Valdez H AD - Univ Texas, MD Anderson Canc Ctr, Dept Immunol, Houston, TX 77030, USASchering Plough, Lab Immunol Res, F-69571 Dardilly, FranceInst Nacl Salud Publ, Ctr Invest Sobre Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoMartinez-Valdez, H, Univ Texas, MD Anderson Canc Ctr, Dept Immunol, Box 178,1515 Holcombe Blvd, Houston, TX 77030 USA TI - Regulation of CD40 and CD40 ligand by the AT-hook transcription factor AKNA AB - Proteins containing AT hooks bind A/T-rich DNA through a nine-amino-acid motif and are thought to co-regulate transcription by modifying the architecture of DNA, thereby enhancing the accessibility of promoters to transcription factors(1,2). Here we describe AKNA, a human AT-hook protein that directly binds the A/T-rich regulatory elements of the promoters of CD40 and CD40 ligand (CD40L) and coordinately regulates their expression. Consistent with its function, AKNA is a nuclear protein that contains multiple PEST protein-cleavage motifs, which are common in regulatory proteins with high turnover rates(3). AKNA is mainly expressed by B and T lymphocytes, natural killer cells and dendritic cells. During B-lymphocyte differentiation, AKNA is mainly expressed by germinal centre B lymphocytes, a stage in which receptor and ligand interactions are crucial for B-lymphocyte maturation(4-12). Our findings show that an AT-hook molecule can coordinately regulate the expression of a key receptor and its ligand, and point towards a molecular mechanism that explains homotypic cell interactions MH - France MH - Mexico|Morelos MH - USA PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 22 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000167464100055 L2 - GERMINAL-CENTERS; B-CELLS; IMMUNE-RESPONSE; BINDING; GENE; EXPRESSION; ACTIVATION; PROTEINS; COSTIMULATION; LYMPHOCYTES SO - Nature 2001 ;410(6826):383-387 4302 UI - 12341 AU - Sideris EB AU - Rao S AU - Macuil B AU - Varvarenko V AU - Zamora R AD - Athenian Inst Pediat Cardiol, Athens, GreeceSt Louis Univ, St Louis, MO 63103, USAMil Hosp, Mexico City, DF, MexicoTomsc CV Inst, Tomsk, RussiaUniv Arizona, Tucson, AZ 85721, USA TI - The adult with the giant patent ductus arteriosus: The transcatheter occlusion challenge MH - Greece MH - Mexico|Distrito Federal MH - Russia MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000171895002786 SO - Circulation 2001 ;104(17):593-593 4303 UI - 12729 AU - Sideris EB AU - Toumanides S AU - Macuil B AU - Varvarenko V AU - Alekyan B AU - Stamatelopoulos S AU - Moulopoulos SD AU - Sokolov A AD - Athenian Inst Pediat Cardiol, Dept Pediat Cardiol, Athens, GreeceUniv Athens, Dept Clin Therapeut, Athens, GreeceMil Hosp, Dept Pediat Cardiol, Mexico City, DF, MexicoTomsk Cardiovasc Inst, Tomsk, RussiaVakulev Cardiovasc Inst, Moscow, Russia TI - Transcatheter patch occlusion of secundum atrial septal defects: early clinical experience MH - Greece MH - Mexico|Distrito Federal MH - Russia PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000170988300328 SO - European Heart Journal 2001 ;22():85-85 4304 UI - 12730 AU - Sideris EB AU - Macuil B AU - Zhang J AU - Leonard C AD - Athenian Inst Pediat Cardiol, Dept Pediat Cardiol, Athens, GreeceMil Hosp, Dept Pediat Cardiol, Mexico City, DF, MexicoGuandong Cardiovasc Inst, Guanzu, Peoples R China TI - Transcatheter perimembranous ventricular septal defect occlusion by wireless devices MH - Greece MH - Mexico|Distrito Federal MH - Peoples R China PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000170988301801 SO - European Heart Journal 2001 ;22():471-471 4305 UI - 14310 AU - Siemens X AU - Martin X AU - Olum KD AD - Tufts Univ, Dept Phys & Astron, Inst Cosmol, Medford, MA 02155, USAInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoSiemens, X, Tufts Univ, Dept Phys & Astron, Inst Cosmol, Medford, MA 02155 USA TI - Dynamics of cosmic necklaces AB - We perform numerical simulations of cosmic necklaces (systems of monopoles connected to two strings each) and investigate the conditions under which monopoles annihilate. When the total monopole energy is large compared to the string energy, we find that the string motion is no longer periodic, and thus the strings will be chopped up by self intersection. When the total monopole energy is much smaller than the string energy, the string motion is periodic, but that of the monopoles is not, and thus the monopoles travel along the string and annihilate with each other. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000166912800018 L2 - STRINGS; MONOPOLES; RAYS SO - Nuclear Physics B 2001 ;595(1-2):402-414 4306 UI - 14212 AU - Sierra O AU - Duda Y AD - Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoUNAM, Fac Ingn, Mexico City 04510, DF, MexicoInst Condensed Matter Phys, UA-11 Lviv, UkraineDuda, Y, Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, Mexico TI - Fluid-fluid phase equilibria in disordered porous media. Nonadditive hard sphere mixture AB - We report a computer simulation and integral equation study of fluid-fluid phase equilibria of nonadditive hard sphere binary mixture adsorbed in disordered hard sphere matrix. The mixture exhibits phase separation with critical density rho (f)(c) lower than its bulk counterpart. It is found that rho (f)(c) decreases with increasing both porosity and nonadditivity parameter. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000167124200006 L2 - fluid-fluid equilibria;porous media;simulation;integral equations;ORNSTEIN-ZERNIKE EQUATIONS; SCALED PARTICLE THEORY; NON-ADDITIVE DIAMETERS; INTEGRAL-EQUATION; BINARY MIXTURE; SEPARATION; ADSORPTION; SIMULATION; ENSEMBLE; STATE SO - Physics Letters A 2001 ;280(3):146-152 4307 UI - 12691 AU - Sigalotti LD AU - Klapp J AD - Inst Venezolano Invest Cient, Ctr Fis, Caracas 1020A, VenezuelaInst Nacl Invest Nucl, Ocoyoacac 52045, MexicoSigalotti, LD, Inst Venezolano Invest Cient, Ctr Fis, Apartado 21827, Caracas 1020A, Venezuela TI - Protostellar collapse models of prolate molecular cloud cores AB - The continued detection of binary systems among pre-main-sequence stars suggests that fragmentation is a very frequent process during the early stages of star formation. However, the fragmentation hypothesis rests only upon the results of three-dimensional hydrodynamics code calculations. The validity of isothermal fragmentation calculations was questioned by the results of Truelove et al. (1997), and more recently, of Boss et al. (2000), who found, working at very high spatial resolution, that a particular Gaussian cloud model collapsed isothermally to form a singular filament rather than a binary or quadruple protostellar system as predicted by previous calculations. Sufficiently high spatial resolution is necessary to resolve the Jeans length and hence avoid artificial fragmentation in isothermal collapse calculations. Here we use an adaptive, spherical-coordinate hydrodynamics code based on the "zooming" coordinates to investigate the isothermal collapse of centrally condensed (Gaussian), prolate (2:1 axial ratio) cloud core models, with thermal energy alpha approximate to 0:22 and varied rotational energy (0.246 less than or equal to beta less than or equal to 0.00025), to discern whether they will still undergo fragmentation into a protostellar binary system, as found in most previous prolate cloud collapse calculations, or condense all the way into a thin filament, as suggested by the linear analysis of Inutsuka & Miyama (1992) and the findings of Truelove et al. and Boss et al. for the spherical, Gaussian cloud model. The prolate clouds all collapsed self-similarly to produce an intermediate barlike core, which then shrank indefinetely into a singular filament without fragmenting. Collapse of the bar into a thin filament also occurred self-similarly, with the forming filaments being much longer than the Jeans length. Since the filaments form at maximum densities that are typical of the transition from the isothermal to the nonisothermal phase, gradual heating may retard the collapse and allow fragmentation of the filament into a binary or multiple protostellar core, as required to explain the high frequency of binary stars MH - Mexico|Estado De Mexico MH - Venezuela PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171486600025 L2 - hydrodynamics;methods : numerical;stars : formation;binaries : general;INITIAL DIFFERENTIAL ROTATION; STAR-FORMATION; DENSE CORES; FRAGMENTATION MODELS; AMBIPOLAR DIFFUSION; JEANS CONDITION; DARK CLOUDS; EVOLUTION; FILAMENTS; HYDRODYNAMICS SO - Astronomy & Astrophysics 2001 ;378(1):165-179 4308 UI - 13890 AU - Sigalotti LD AU - Klapp J AD - Inst Venezolano Invest Cient, Ctr Fis, Caracas 1020A, VenezuelaUniv Los Andes, Fac Ciencias, Ctr Astrofis Teor, Merida 5251, VenezuelaININ, Ocoyoacac 52045, Estado De Mexic, MexicoSigalotti, LD, Inst Venezolano Invest Cient, Ctr Fis, Apartado 21827, Caracas 1020A, Venezuela TI - Gravitational collapse and fragmentation of molecular cloud cores AB - The detected multiplicity of main-sequence and pre-main-sequence stars along with the emerging evidence for binary and multiple protostars, imply that stars may ultimately form by fragmentation of collapsing molecular cloud cores. These discoveries, coupled with recent observational knowledge of the structure of dense cloud cores and of the properties of young binary stars, provide serious constraints to the theory of star formation. Most theoretical progress in the field of star formation is largely based on numerical calculations of the early collapse and fragmentation of protostellar clouds. Although these models have been quite successful at predicting the formation of binary protostars, a direct comparison between theory and observations has not yet been established. The results of recent observations as well as of early and recent analytic and numerical models, on which the present theory of star formation is based, are reviewed here in a self-consistent manner MH - Mexico|Estado De Mexico MH - Venezuela PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0218-2718 UR - ISI:000168216100001 L2 - ROTATING INTERSTELLAR CLOUDS; SMOOTHED PARTICLE HYDRODYNAMICS; YOUNG STELLAR OBJECTS; BINARY STAR-FORMATION; SOLAR-TYPE STARS; CYLINDRICALLY SYMMETRICAL CONTRACTION; ANGULAR-MOMENTUM PROBLEM; TIME-DEPENDENT SOLUTION; SELF-SIMILAR COLLAPSE; MAIN-SEQUENCE STARS SO - International Journal of Modern Physics D 2001 ;10(2):115-211 4309 UI - 11050 AU - Silaghi-Dumitrescu I AU - Cretiu G AU - Silaghi-Dumitrescu L AU - Haiduc I AU - Toscano A AU - Cea-Olivares R AD - Univ Babes Bolyai, Dept Chem, RO-3400 Cluj Napoca, RomaniaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoSilaghi-Dumitrescu, I, Univ Babes Bolyai, Dept Chem, 1 Kogalniceanu Str, RO-3400 Cluj Napoca, Romania TI - Crystal, molecular, and electronic structure of 9,9 '-bis(trimethylsilyl)fluorene AB - The crystal and molecular structure of 9,9'-bis(trimethylsilyl)fluorene (1) has been determined by X-ray diffraction. The crystal of (1) is orthorhombic, space group Pnma with unit cell dimensions: a=16.906(2) Angstrom, b=13.8080(10) Angstrom, c=8.1690(10) A, alpha=beta=gamma=90degrees. The silicon atoms are in a slightly distorted tetrahedral environment with C-Si-C bond angles in the range 107.13degrees-112.49degrees. A notable feature of the molecular structure is the significant deviation of the Sil-C9-Si2 angle (118.9degrees) from the normal tetrahedral value. This behaviour is attributed mainly to some intramolecular CH...pi interactions MH - Mexico|Distrito Federal MH - Romania PB - BUCHAREST: EDITURA ACADEMIEI ROMANE RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0035-3930 UR - ISI:000175845100004 L2 - COMPLEXES SO - Revue Roumaine de Chimie 2001 ;46(4):289-295 4310 UI - 13731 AU - Silant'ev NA AD - Inst Nacl Astrofis Opt & Elect, ZP, Puebla 72000, MexicoRussian Acad Sci, Main Astron Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl Astrofis Opt & Elect, ZP, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - The estimations of magnetic field fluctuations atmospheres in turbulent AB - We qualitatively analyze the equations of the magnetohydrodynamics for various quadratic fluctuations of the magnetic field and the vector potential. For the stationary inhomogeneous state, rye have established the exact integral relations between the magnetic field fluctuations b(r, t) and the mean magnetic field B-0(r, t). We estimate alpha approximate to (eta + beta )B-0 (del x B-0)/B-0(2) where eta and beta are the ohmic (molecular) and turbulent diffusivities, respectively. The alpha - coefficient describes the enhancement of the mean magnetic field. We found that the exact Seehafer formula B-0. = -eta is also valid for the locally stationary and homogeneous evolution of magnetic fluctuations (u is the Euler turbulent velocity). It is shown that the usual a-coefficient; more correctly the term alphaB(0).(del x B-0), presents with opposite signs in equations for B-0(2) and b(2)>, i.e. the rate of increase of the total magnetic energy does not depend directly on this coefficient. T We show that at the moment tb of the maximum of magnetic fluctuations, b(2)> approximate to B-0(2). The same also holds for the locally homogeneous and stationary regime if the spectrum of the turbulence has a slow decrease in the inertial region of wave numbers. The detailed analysis of two-dimensional turbulence has shown that the Zeldovich estimate b(2)> approximate to beta/etaB(0)(2) is valid only at the maximum of the vector potential fluctuations. This estimate is corrected such that at tb it also gives b(2)> approximate to B-0(2). We also give the approximate expression for the alpha -coefficient which takes into account the back reaction of the mean magnetic field onto the turbulence itself MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168611400024 L2 - magnetic fields;turbulence;stars : magnetic fields;Sun : magnetic fields;DIFFUSION; HELICITY; DYNAMO SO - Astronomy & Astrophysics 2001 ;370(2):533-540 4311 UI - 13676 AU - Silich S AU - Tenorio-Tagle G AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiyv 127, Golosiiv, UkraineSilich, S, Inst Nacl Astrofis Opt & Elect, AP 51,Luis Enrique Erro 1, Puebla 72000, Mexico TI - On the energy required to eject processed matter from galaxies AB - We evaluate the minimum energy input rate that starbursts require for expelling newly processed matter from their host galaxies. Special attention is given to the pressure caused by the environment in which a galaxy is situated, as well as to the intrinsic rotation of the gaseous component. We account for these factors and for a massive dark matter distribution, and we develop a self-consistent solution for the interstellar matter gas distribution. Our results are in excellent agreement with the recent results of Mac Low & Ferrara for galaxies with a flattened, disklike ISM density distribution and a low intergalactic gas pressure (P-IGM/k less than or equal to 1 cm(-3) K). However, our solution also requires a much larger energy input rate threshold when one takes into consideration both a larger intergalactic pressure and the possible existence of a low-density, nonrotating, extended gaseous halo component MH - Mexico|Puebla MH - Ukraine PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 49 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000168803100010 L2 - galaxies : ISM;galaxies : starburst;ISM : abundances;ISM : bubbles;ISM : general;X-RAY-EMISSION; DWARF GALAXIES; INTERSTELLAR-MEDIUM; GALACTIC WINDS; MASS; SUPERBUBBLES; DYNAMICS; GAS SO - Astrophysical Journal 2001 ;552(1):91-98 4312 UI - 13461 AU - Silich SA AU - Tenorio-Tagle G AU - Terlevich R AU - Terlevich E AU - Netzer H AD - Inst Nacl Astrofis Opt & Electron, Puebla 72000, MexicoNatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev 127, UkraineUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandTel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, IsraelSilich, SA, Inst Nacl Astrofis Opt & Electron, AP 51, Puebla 72000, Mexico TI - Evolution of the X-ray luminosity and metallicity of starburst blown superbubbles AB - We have modelled the evolution of hot superbubbles in starbursts, taking into account the rapid changes in the chemical composition of the interior of the superbubbles resulting from the large stellar mass loss, i.e. stellar winds from massive young stars and type II supernovae. We have followed in detail the time-dependent production and mixing of oxygen and iron in the interior of the hot superbubbles and showed that while the oxygen abundance rapidly climbs to over solar values in less than 10 Myr, iron abundance remains always under solar. This highly enhanced oxygen metallicity boosts the early X-ray luminosity of superbubbles while keeping the iron abundance subsolar. This brings theory and X-ray observations of the luminosity and metal content of young starbursts closer together MH - United Kingdom MH - Israel MH - Mexico|Puebla MH - Ukraine PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000169352700023 L2 - hydrodynamics;ISM : abundances;ISM : bubbles;galaxies : starburst;X-rays : bursts;LARGE MAGELLANIC CLOUD; INTERSTELLAR-MEDIUM; ROSAT OBSERVATIONS; CHEMICAL EVOLUTION; DWARF GALAXIES; MASS-LOSS; GAS; CIRCULATION; CONSTRAINTS; ABUNDANCES SO - Monthly Notices of the Royal Astronomical Society 2001 ;324(1):191-200 4313 UI - 14005 AU - Silva-Briano M AU - Dumont HJ AD - Univ Autonoma Aguascalientes, Ctr Ciencias Basicas, Dept Biol, Aguascalientes, MexicoState Univ Ghent, Inst Anim Ecol, B-9000 Ghent, BelgiumSilva-Briano, M, Univ Autonoma Aguascalientes, Ctr Ciencias Basicas, Dept Biol, Av Univ 940,Fracc Primo Verdad CP 20100, Aguascalientes, Mexico TI - Wlassicsia, Bunops & Onchobunops (Anomopoda), three related genera AB - Comparison of the gross morphology and trunk limb ultrastructure of the macrothricid genera Wlassicsia, Bunops and Onchobunops by light and electron microscopy demonstrated their morphological similarity. We propose the synonymy of Onchobunops Fryer & Paggi with Bunops Birge on the basis of shared characteristics MH - Belgium MH - Mexico|Aguascalientes PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000167924900001 L2 - Macrothricidae;trunk limb comparison;synonymy;hyaline long element (seta);SEM;ultrastructure;MACROTHRICIDAE; CRUSTACEA SO - Hydrobiologia 2001 ;442(1-3):1-28 4314 UI - 13980 AU - Silva-Moreno AA AU - Nava MAM AU - Barbosa-Garcia O AU - az-Torres LA AU - Romo FC AU - Boulon G AD - Ctr Invest Opt, Leon Gto 37150, MexicoUniv Lyon 1, Lab Physicochim Mat Luminescents, CNRS, UMR 5620, F-69622 Villeurbanne, FranceInst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 07738, DF, MexicoBarbosa-Garcia, O, Ctr Invest Opt, Loma Bosque 115, Leon Gto 37150, Mexico TI - Direct energy transfer and migration among Cr ions in the Cr, Nd : GSGG luminescent system AB - Two sets of experimental data of the chromium emission, at short and long times, for the non-radiative energy transfer processes in Cr, Nd:GSGG (Gd3Sc2Ga3O12) are analyzed. In contrast to previous analysis, our modeling allows calculating the whole fluorescent transient, that is, it is not divided into three rime regimes, as current models do, nor a cut-off distance is introduced. The observed fast initial decay is due to a sum of multipolar and exchange interactions among dopants while for longer times the migration of energy among Cr ions cannot be neglected. Our analysis is based on solving the corresponding master equations that govern the non-radiative energy transfer processes among dopants. The used free parameters for our calculations are identical to those used in current models and for our analysis the corresponding values were independent of the dopants concentration. (C) 2001 Published by Elsevier Science B.V MH - France MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000167805700031 L2 - energy transfer;GSGG crystals SO - Optical Materials 2001 ;16(1-2):221-226 4315 UI - 13124 AU - Silva-Ortigoza G AD - Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAUniv Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72570, MexicoSilva-Ortigoza, G, Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA TI - A note on the null surface formulation of GR AB - The purpose of this work is to study the structure and nature of the singularities of wavefronts in flat space-time. We computed the behavior at the singularities of important objects that take place in the null surface formulation of general relativity. As a secondary result we show that the Minkowski space-time with non-trivial null surfaces is a solution of the null surface approach to general relativity MH - USA MH - Mexico|Puebla PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000170382800008 L2 - flat space-time;null surfaces;general relativity;EIKONAL EQUATION; FLAT SPACE SO - General Relativity and Gravitation 2001 ;33(6):1077-1091 4316 UI - 14597 AU - Silva-Ortigoza G AD - Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAUniv Autonoma Puebla, Fac Ciencias Fis & Matemat, Puebla 72570, MexicoSilva-Ortigoza, G, Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA TI - The method of adjoint operators and a symmetry operator for the Maxwell equations in type-D vacuum backgrounds AB - Since in all the type-D solutions of the Einstein vacuum field equations with a cosmological term each maximal spin-weighted component of the electromagnetic spinor field satisfies a decoupled equation and there exists a two-index Killing spinor field; we show, via the adjoint operators method, that a symmetry operator for the Maxwell equations can be constructed. (C) 2001 American Institute of Physics MH - USA MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000166190600022 L2 - FIELDS SO - Journal of Mathematical Physics 2001 ;42(1):368-375 4317 UI - 14410 AU - Silva-Pereyra J AU - Fernandez T AU - Harmony T AU - Bernal J AU - Galan L AU - az-Comas L AU - Fernandez-Bouzas A AU - Yanez G AU - Rivera-Gaxiola M AU - Rodriguez M AU - Marosi E AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, MexicoUniv Nacl Autonoma Mexico, Neurociencias ENEP Iztacala, La Habana, CubaCtr Neurociencias, La Habana, CubaSilva-Pereyra, J, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus UNAM UAQ Juriquilla,Postal 1-1141, Queretaro 76001, Mexico TI - Delayed P300 during Sternberg and color discrimination tasks in poor readers AB - The P300 ERP component was studied in poor and normal readers, using Sternberg and color discrimination (Spaceships) tasks. During the first one, subjects must decide if a probe item belongs or not to a set of digits previously presented. In the second one, the participants must shoot violet spaceships with one key and other than violet spaceships with another key. There were no significant differences between groups with respect to reaction times, but a larger proportion of errors was observed in poor readers. Longer P300 latencies were recorded for poor readers than controls in both tasks. P300 amplitudes showed topographical differences between the two groups: Poor readers' P300 is larger frontally during the Sternberg task, but smaller at posterior sites during the Spaceships task. These results suggest that poor readers may have deficiencies during the early processing stage, such as Visual stimulus evaluation. Poor readers also appear to have deficits for classifying and memorizing visual stimuli. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Psychology, Biological;Neurosciences;Physiology;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 0167-8760 UR - ISI:000166683700002 L2 - poor readers;P300 latency;working memory;attention;event-related potentials;Sternberg task;EVENT-RELATED POTENTIALS; LESS SKILLED READERS; SHORT-TERM-MEMORY; WORKING-MEMORY; BRAIN POTENTIALS; LEARNING-DISABILITIES; DYSLEXIC-CHILDREN; ATTENTION; LATENCY; ADULTS SO - International Journal of Psychophysiology 2001 ;40(1):17-32 4318 UI - 12453 AU - Silva-Zolezzi I AU - Hebron KJ AU - Mihalik SJ AU - Valle D AU - Jimenez-Sanchez G AD - Johns Hopkins Univ, Inst Genet Med, Baltimore, MD, USACINVESTAV, Programa Doctoral Biomed Mol, Mexico City 14000, DF, MexicoKennedy Krieger Inst, Baltimore, MD, USA TI - Defective non-shivering thermogenesis triggered by inappropriate activation of PPAR alpha in the 70kDa Peroxisomal Membrane Protein (PMP70) deficient mice MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648900137 SO - American Journal of Human Genetics 2001 ;69(4):202-202 4319 UI - 12661 AU - Silver J AU - Frampton CS AU - Fern GR AU - Davies DA AU - Miller JR AU - Sosa-Sanchez JL AD - Univ Greenwich, Sch Chem & Life Sci, London SE18 6PF, EnglandRoche Discovery Welwyn, Welwyn Garden City AL7 3AY, Herts, EnglandUniv Essex, Dept Biol Sci, Colchester CO4 3SQ, Essex, EnglandUniv Autonoma Puebla, Inst Ciencias Benemerita, Ctr Invest Dispositivos Semicond, Puebla 72570, MexicoSilver, J, Univ Greenwich, Sch Chem & Life Sci, Woolwich Campus, London SE18 6PF, England TI - Novel seven coordination geometry of Sn(IV): Crystal structures of phthalocyaninato bis(undecylcarboxylato)Sn(IV), its Si(IV) analogue, and phthalocyaninato bis(chloro)silicon(IV). The electrochemistry of the Si(IV) analogue and related compounds AB - Three newly elucidated crystal structures of group IV phthalocyaninato complexes are reported, along with data for two further Sipe carboxylate complexes. In one of these crystal structures, bis(undecylcarboxylate)Sn(IV) phthalocyanine, the tin ion is seven coordinate, which is a unique finding for this atom in phthalocyanine ring coordination. Comparison of these structures with other group IV phthalocyaninato and related structures reveals differences, illustrating features significant in the chemistries of Si(IV) and Sn(IV) ions. These differences are thought to originate from their differing sizes and polarizabilities. The structures show that the Sn(IV) ion can only occupy an in-plane location in the phthalocyaninato ring where it elongates toward the two axial ligands. When the axial ligands do not facilitate this elongation cis coordination is preferred and the Sn(IV) ion sits above the phthalocyaninato ring plane. In contrast, the Si(IV) structures, with smaller, harder (i.e., less polarizable) Si(IV) ions, are six coordinate with the Si(IV) ion in the phthalocyaninato ring plane in a distorted octahedral symmetry. The electronic spectra and cyclic voltammetry of some of the Si compounds indicate that on the electrode the oxidized/reduced species behave as though they are in a solid film, rather than a soluble freely diffusing species MH - United Kingdom MH - Mexico|Puebla PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000171460300023 L2 - NONLINEAR-OPTICAL PROPERTIES; PHOTODYNAMIC THERAPY; SILICON PHTHALOCYANINES; THIN-FILMS; X-RAY; CELLS; MELANOCYTES; MICE SO - Inorganic Chemistry 2001 ;40(21):5434-5439 4320 UI - 13390 AU - Silvertooth JC AU - Navarro JC AU - Norton ER AU - Sanchez CA AD - Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721, USACaborca Expt Stn, Caborca, Sonora, MexicoSilvertooth, JC, Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721 USA TI - Evaluation of a nitrogen-15 microplot design in furrow-irrigated cotton AB - Information is needed regarding an appropriate microplot design for use in furrow-irrigated row crop systems. Field experiments were conducted at two locations in Arizona, Maricopa in 1991 (Casa Grande sandy loam) and Marana in 1995 (Pima clay loam), The purposes of the experiments were to evaluate the dimensions of an N-15 microplot design used in a furrow irrigated row crop system, The experiments each utilized ammonium sulfate fertilizer with 5 atom% N-15 enrichment applied at a rate of 56 kg N/ha in a simulated side-dress band application during the early bloom stage of development of Upland cotton (Gossypium hirsutum L.). At each location, microplots were four, 1.02-m rows wide and 1.00 m in length. Whole plant samples were collected at specific locations within and near the microplots. Collection of plant materials at a minimum distance of 25 cm from the microplot borders provided uniform N-15 enrichment levels for determining fertilizer N uptake and recovery, Microplots with the dimensions of those used in this study are sufficient for collecting plant materials from a l-mz area, consisting of two, 50-cm segments from the interior two rows of the four row microplot, MH - USA MH - Mexico|Sonora PB - MADISON: SOIL SCI SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Soil Science U5 - J;Article AV - English IS - 0361-5995 UR - ISI:000169464100033 L2 - FERTILIZER NITROGEN; SIZE REQUIREMENTS; PLOT SIZE; N-15; RECOVERY; CORN SO - Soil Science Society of America Journal 2001 ;65(1):247-250 4321 UI - 13768 AU - Silvertown J AU - Franco M AU - Perez-Ishiwara R AD - Open Univ, Dept Biol Sci, Milton Keynes MK7 6AA, Bucks, EnglandUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoSilvertown, J, Open Univ, Dept Biol Sci, Milton Keynes MK7 6AA, Bucks, England TI - Evolution of senescence in iteroparous perennial plants AB - We applied four tests to detect evidence of the evolution of senescence in life tables and fecundity schedules for 65 species of iteroparous perennial plants. Test 1 determined the pattern of variation in age-specific mortality with age (mu (x)). Fifty-five percent of species showed an increase in, or maximum value of, mu (x) at the end of life. In test 2, we tried to separate mortality into initial or baseline mortality and senescent mortality by fitting the survival data of these 65 species to Weibull functions. Unlike published results with animals, the rate of senescence was independent of initial mortality rate. However, a positive relationship was found between rate of senescence and reproductive lifespan, suggesting increasing risk of death with successive reproductive events. It has been suggested that a decline in reproductive value with age is a better diagnostic of senescence, but (in test 3) this occurred in only 9% of species (6/65). Our fourth test detected a positive correlation between age at first reproduction (a) and mean reproductive lifespan (L-a), as predicted by the theory that senescence is due to a trade-off between adult survival and reproduction. Comparing species within the two largest families present in the data set, we found a correlation between a and L, among the Liliaceae, which was largely represented by ramet life tables, but not among the Poaceae, which was largely represented by genet life tables. Clonal growth, which is common in plants, is a necessary but not a sufficient condition to prevent the evolution of senescence. We predict that clones that fragment are more likely to escape the evolution of senescence at the genet level than clones that remain physiologically integrated MH - United Kingdom MH - Mexico|Distrito Federal PB - TUCSON: EVOLUTIONARY ECOLOGY LTD RP - NOT IN FILE U3 - TC 16 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1522-0613 UR - ISI:000168501000002 L2 - age at first reproduction;mortality rate;perennial plants;reproductive lifespan;reproductive value;senescence;Weibull function;LIFE-HISTORY; NATURAL-POPULATIONS; MOLECULAR PHYLOGENY; PATCH DYNAMICS; GENE-SEQUENCES; DEMOGRAPHY; AGE; REPRODUCTION; MORTALITY; TREE SO - Evolutionary Ecology Research 2001 ;3(4):393-412 4322 UI - 12614 AU - Sisniega JL AU - Profant M AU - Verbeeck F AU - Yang JY AU - Lewis D AD - Hosp Clin Parque, Chihuahua, MexicoFac Hosp, Bratislava, SlovakiaBristol Myers Squibb Co, B-1410 Waterloo, BelgiumBristol Myers Squibb Co, Wallingford, CT 06492, USA TI - An open-label, multicenter, non-comparative study of oral BMS-284756 in the treatment of acute bacterial sinusitis in patients undergoing sinus aspirate MH - Belgium MH - Mexico|Chihuahua MH - Slovakia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000171226900476 SO - Clinical Infectious Diseases 2001 ;33(7):1165-1165 4323 UI - 12306 AU - Sivinski J AU - Vulinec K AU - Aluja M AD - USDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USAUniv Florida, Dept Entomol & Nematol, Gainesville, FL 32611, USAInst Ecol, Xalapa 91000, Veracruz, MexicoSivinski, J, USDA ARS, Ctr Med Agr & Vet Entomol, POB 14565, Gainesville, FL 32604 USA TI - Ovipositor length in a guild of parasitoids (Hymenoptera : Braconidae) attacking Anastrepha spp. fruit flies (Diptera : Tephritidae) in southern Mexico AB - In southern Mexico, four native and one introduced species of Opiinae (Braconidae) attack larvae of Anastrepha spp. fruit flies. There is a substantial overlap in the hosts of the parasitoids, and every species has been collected from fruit flies attacked by at least one or two other species. The ovipositors of these braconids have a broad interspecific range of lengths, some are less than the length of the abdomen, and others, several times the length of the abdomen. The following three hypotheses are proposed to account for this variety of lengths: (1) Because of differences in the host stage attacked, there are differences in host vulnerability; i.e., mature host larvae feed at greater depths within fruit pulp and can be best reached with a longer ovipositor. There is an implication that competition among the wasp species has selected for foraging on different host stages and that this diversifying selection has resulted in different ovipositor lengths. (2) Although longer ovipositors increase host range and thus have competitive advantages, they may be heavy, awkward, and expensive to move around. If so, species with longer ovipositors might have to invest more in locomotion (reflected in wing size) and less in reproductive capacity (numbers of mature eggs held in the ovarial calyx), Balancing selection would then maintain both short ovipositor-small winged-high fecundity species and long ovipositor-large wing-low fecundity species. (3) Although there are niche overlaps among the species, each has a "core environment" determined by factors such as temperature, humidity, seasonality, and host diversity. Ovipositor lengths have evolved to met the requirements of these specialized environments, and are not due to interspecific competition mediated by ovipositor length; i.e,, there has been no diversifying or balancing selection for differences in ovipositor length. Hypothesis number I fails because all the species attack similar host stages. Neither was there support for hypothesis number 2. There were no correlations between wing size, or potential fecundity, and ovipositor length. The lack of correlation between species-pairs niche overlaps and differences in species-pairs relative ovipositor length is most consistent with hypothesis number 3. That is, because species with similar ovipositors are neither more or less likely I P to co-occur in the same samples from various fruits and locations than species with different ovipositor lengths it may be that species interactions are unimportant in the evolution of ovipositor lengths. If so, the lack of a pattern of competition made easily recognizable by differences in ovipositor length could influence biological control tactics. For example, if it is difficult to predict the abilities of newly introduced species to integrate in the existing guild of natural enemies, it may be more prudent over the short term to concentrate on the conservation of the natural enemies already present rather than pursue the "classical" introductions of new species MH - USA MH - Mexico|Veracruz PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 14 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000172451400009 L2 - Diachasmimorpha;Doryctobracon;Opius;Utetes;biological control;interspecific competition;DISTRIBUTIONS; SELECTION; VERACRUZ; HOST SO - Annals of the Entomological Society of America 2001 ;94(6):886-895 4324 UI - 13526 AU - Skovmand B AU - Reynolds MP AU - Delacy IH AD - Int Maize & Wheat Improvement Ctr, Mexico City, DF, MexicoUniv Queensland, Sch Land & Food Sci, Brisbane, Qld, AustraliaSkovmand, B, Int Maize & Wheat Improvement Ctr, Mexico City, DF, Mexico TI - Mining wheat germplasm collections for yield enhancing traits AB - The material in genebanks includes valuable traditional varieties and landraces, non-domesticated species, advanced and obsolete cultivars, breeding lines and genetic stock. It is the wide variety of potentially useful genetic diversity that makes collections valuable. While most of the yield increases to date have resulted from manipulation of a few major traits (such as height, photoperiodism, and vernalization), meeting future demand for increased yields will require exploitation of novel genetic resources. Many traits have been reported to have potential to enhance yield, and high expression of these can be found in germplasm collections. To boost yield in irrigated situations, spike fertility must be improved simultaneously with photosynthetic capacity. CIMMYT's Wheat Genetic Resources program has identified a source of multi-ovary florets, with up to 6 kernels per floret. Lines from landrace collections have been identified that have very high chlorophyll concentration, which may increase leaf photosynthetic rate. High chlorophyll concentration and high stomatal conductance are associated with heat tolerance. Recent studies, through augmented use of seed multiplication nurseries, identified high expression of these traits in bank accessions, and both traits were heritable. Searches are underway for drought tolerance traits related to remobilization of stem fructans, awn photosynthesis, osmotic adjustment, and pubescence. Genetic diversity from wild relatives through the production of synthetic wheats has produced novel genetic diversity MH - Australia MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000169211500004 L2 - seed multiplication nurseries;synthetic wheat;wheat germplasm SO - Euphytica 2001 ;119(1-2):25-32 4325 UI - 12861 AU - Slee OB AU - Roy AL AU - Murgia M AU - Andernach H AU - Ehle M AD - CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaMax Planck Inst Radioastron, D-53121 Bonn, GermanyUniv Bologna, Dipartmento Fis, I-40127 Bologna, ItalyCNR, Ist Radioastron, I-40129 Bologna, ItalyUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoXMM Newton Sco Operat Ctr, E-28080 Madrid, SpainESA, ESTEC, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, NetherlandsSlee, OB, CSIRO, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia TI - Four extreme relic radio sources in clusters of galaxies AB - We describe the results of the highest-resolution radio observations yet made of four relic radio sources in the Abell clusters A13, A85, A133, and A4038. Our Very Large Array images at 1.4 GHz with 4" resolution and a noise level of 1 sigma similar to 20 mu Jy beam(-1) (1.1 K) show a remarkable variety of fine structure in the form of spectacular arcs, wisps, plumes, and loops. Their integrated radio flux densities fall very rapidly with frequency, with power-law slopes, alpha, between 2.1 and 4.4 near 1.4 GHz [where S-v proportional to (v/v(o))(-alpha)]. The relics possess linear polarization levels ranging between 2.3% (A133) and 35% (A85); the higher polarization fractions imply a highly ordered magnetic field in the fine structure and low differential Faraday rotation in the intervening cluster gas. The optical identification of a host galaxy formerly associated with a relic remains problematic. In A85, A133, and A4038 the travel times for the brightest cluster galaxies are significantly longer than the modeled ages of the relics; there is always at least one nearby relatively bright elliptical galaxy that provides a better match. Excess X-ray emission in the 0.5 to 2 keV band was found near the relics in A85 and A133. The surface brightness was too high to be attributed to the inverse Compton mechanism alone. We found excellent fits to the broadband radio spectra using the anisotropic model of spectral aging, and we have extended the model to include diffusion of particles between regions of different field strength. The steep radio spectra imply ages for the relics of similar to 10(8) yr, at the start of which period their radio luminosities would have been similar to 10(25) W Hz(-1) at 1.4 GHz, and so their progenitors were on the boundary between FR I and FR II radio galaxies and hence among the most luminous 7% of radio galaxies. We find that the relics are in approximate pressure equilibrium with the surrounding intracluster gas, which has probably limited their free expansion and prevented them from fading by adiabatic cooling MH - Australia MH - Germany MH - Italy MH - Mexico|Guanajuato MH - Netherlands MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 41 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000170997700007 L2 - galaxies : clusters : general;radio continuum;X-rays;VLA SKY SURVEY; 11.1 CM MAPS; X-RAY; RICH CLUSTERS; ABELL CLUSTERS; COMA-CLUSTER; MAGNETIC-FIELD; SPECTRUM; EMISSION; SCALE SO - Astronomical Journal 2001 ;122(3):1172-1193 4326 UI - 12851 AU - Sloan NL AU - Langer A AU - Hernandez B AU - Romero M AU - Winikoff B AD - Populat Council, New York, NY 10017, USAPopulat Council, Mexico City, DF, MexicoInst Nacl Salud Publ, Mexico City, DF, MexicoSloan, NL, Populat Council, 1 Dag Hammarskjold Plaza, New York, NY 10017 USA TI - The etiology of maternal mortality in developing countries: what do verbal autopsies tell us? AB - Objective To reassess the practical value of verbal autopsy data, which, in the absence of more definitive information, have been used to describe the causes of maternal mortality and to identify priorities in programmes intended to save women's lives In developing countries. Methods. We reanalysed verbal autopsy data from a study of 145 maternal deaths that occurred in Guerrero, Queretaro and San Luis Potosi, Mexico, in 1995, taking into account other causes of death and the WHO classification system. The results were also compared with Information given on imperfect death certificates. Findings The reclassification showed wide variations in the attribution of maternal deaths to single specific medical causes. Conclusion. The verbal autopsy methodology has Inherent limitations as a means of obtaining histories of medical events. At best it may reconfirm the knowledge that mortality among poor women with little access to medical care is higher than that among wealthier women who have better access to such care MH - USA MH - Mexico|Distrito Federal PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 9 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000171138000003 L2 - maternal mortality;cause of death;death certificates;autopsy/methods;interviews;Mexico SO - Bulletin of the World Health Organization 2001 ;79(9):805-810 4327 UI - 14196 AU - Slugovc C AU - Padilla-Martinez I AU - Sirol S AU - Carmona E AD - Tech Univ Vienna, Inst Inorgan Chem, A-1060 Vienna, AustriaUniv Sevilla, CSIC, Inst Invest Quim, Dept Quim Inorgan, Seville 41092, SpainIPN, Unidad Prof Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoSlugovc, C, Tech Univ Vienna, Inst Inorgan Chem, Getreidemarkt 9, A-1060 Vienna, Austria TI - Rhodium- and iridium-trispyrazolylborate complexes - C-H activation and coordination chemistry AB - This review deals with rhodium and iridium complexes of the hydridotris(pyrazolyl)borate (Tp') ligands. In addition to outlining the synthesis of precursor compounds, an overview of the coordination modes of the Tp' ligands is given. Recent developments in the chemistry of some important families of compounds (carbonyls, isonitriles, classical and non-classical polyhydrides) are discussed. Particular attention is given to C-H activation reactions with these compounds. Over 100 references are covered, of which approximately half stem from the last 3 years. (C) 2001 Elsevier Science B.V. All rights reserved MH - Austria MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 64 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0010-8545 UR - ISI:000167246500004 L2 - rhodium;iridium;hydrotris(pyrazolyl)borate;coordination chemistry;C-H activation;RAY CRYSTAL-STRUCTURE; BIS(OLEFIN)RHODIUM POLY(1-PYRAZOLYL)BORATO COMPLEXES; TRANSITION-METAL COMPLEXES; NUCLEAR-MAGNETIC-RESONANCE; CARBON-MONOXIDE ACTIVATION; BOND ACTIVATION; TRIS(PYRAZOLYL)BORATE LIGANDS; DONOR LIGAND; TP-ASTERISK; HYDROTRIS(3,5-DIMETHYLPYRAZOLYL)BORATE LIGAND SO - Coordination Chemistry Reviews 2001 ;213():129-157 4328 UI - 11541 AU - Slusarenko IY AU - Christen JA AU - Orlova LA AU - Kuzmin YV AU - Burr GS AD - Russian Acad Sci, Siberian Branch, Inst Archaeol & Ethnog, Novosibirsk 630090, RussiaInst Matemat, Morelia 58059, Michoacan, MexicoRussian Acad Sci, Siberian Branch, Inst Geol, Novosibirsk 630090, RussiaRussian Acad Sci, Far Eastern Branch, Pacific Inst Geog, Vladivostok 690041, RussiaUniv Arizona, NSF, Arizona AMS Facil, Tucson, AZ 85721, USASlusarenko, IY, Russian Acad Sci, Siberian Branch, Inst Archaeol & Ethnog, Lavrentiev Ave 17, Novosibirsk 630090, Russia TI - C-14 wiggle matching of the 'floating' tree-ring chronology from the Altai Mountains, southern Siberia: The Ulandryk-4 case study AB - The Bayesian approach to calibration of radiocarbon dates was used to wiggle-match the "floating" tree-ring chronology from a Pazyryk culture (Scythian-type complex from Sayan-Altai Mountain system, southern Siberia) burial ground in order to estimate the calendar age of its construction. Seventeen bidecadal tree-ring samples were C-14 dated with high precision (+/-20-30 yr). The results of wiggle-matching show that the Pazyryk-type burial mounds in the southern Altai Mountains were created in the first part of 3rd century BC MH - Mexico|Michoacan MH - Russia MH - USA PB - TUCSON: UNIV ARIZONA DEPT GEOSCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0033-8222 UR - ISI:000174444000039 SO - Radiocarbon 2001 ;43(2A):425-431 4329 UI - 12179 AU - Slysh VI AU - Val'tts IE AU - Migenes V AD - Russian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, Moscow 117810, RussiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoSlysh, VI, Russian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, Profsoyuznaya Ul 84-32, Moscow 117810, Russia TI - A magnetized disk around an O star in W75N. A VLBI map of the OH maser AB - W75N is a star-forming region containing ultracompact H II regions as well as OH, H2O, and methanol masers. The VLBA maps obtained show that the masers are located in a thin disk rotating around an O star, which is the exciting star for the ultracompact H II region VLA1. A separate group of maser spots is associated with the ultracompact H II region VLA2. The radial velocity of the maser spots varies across the disk from 3.7 to 10.9 km/s. The disk diameter is 4000 AU. The maser spots revolve in Keplerian orbits around the O9 star. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Guanajuato MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000172733800003 L2 - POLARIZATION SO - Astronomy Reports 2001 ;45(12):942-948 4330 UI - 14446 AU - Slysh VI AU - Voronkov MA AU - Migenes V AU - Shibata KM AU - Umemoto T AU - Altunin VI AU - Val'tts IE AU - Kanevsky BZ AU - Popov MV AU - Kovalenko AV AU - Fomalont EB AU - Poperechenko BA AU - Gorshenkov YN AU - Carlson BR AU - Dougherty SM AU - Reynolds JE AU - Jiang DR AU - Smirnov AI AU - Grachev VG AD - PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117810, RussiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoNatl Astron Observ, Tokyo 181, JapanCALTECH, Jet Prop Lab, Pasadena, CA 91109, USANatl Radio Astron Observ, Charlottesville, VA 22903, USAMoscow Power Engn Inst, Special Res Bur, Moscow 111250, RussiaNatl Res Council Canada, Herzberg Inst Astrophys, Domin Radio Astrophys Observ, Penticton, BC V2A 6K3, CanadaAustralia Telescope Natl Facil, Epping, NSW 2121, AustraliaShanghai Astron Observ, Shanghai 200080, Peoples R ChinaInst Appl Astron, St Petersburg 197042, RussiaSlysh, VI, PN Lebedev Phys Inst, Ctr Astro Space, Profsoyuznaya 84-32, Moscow 117810, Russia TI - Space-VLBI observations of the OH maser OH 34.26+0.15: low interstellar scattering AB - We report on the first space-VLBI observations of the OH 34.26+0.15 maser in two main-line OH transitions at 1665 and 1667 MHz. The observations involved the space radio telescope on board the Japanese satellite HALCA and an array of ground radio telescopes. The map of the maser region and images of individual maser spots were produced with an angular resolution of 1 mas, which is several times higher than the angular resolution available on the ground. The maser spots were only partly resolved and a lower limit to the brightness temperature 6 x 10(12) K was obtained. The maser seems to be located in the direction of low interstellar scattering, an order of magnitude lower than the scattering of a nearby extragalactic source and pulsar MH - Australia MH - Canada MH - Japan MH - Mexico|Guanajuato MH - Peoples R China MH - Russia MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000166574700003 L2 - masers;scattering;stars : formation;HII regions;ISM : molecules;H-II-REGION; VLA SO - Monthly Notices of the Royal Astronomical Society 2001 ;320(2):217-223 4331 UI - 11826 AU - Smirnov YF AU - Kharitonov YI AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, RussiaSmirnov, YF, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Quantum algebra U-q(2,1): q analogs of the Gelfand-Graev formulas AB - The discrete series of unitary irreducible representations of the noncompact quantum algebra U-q(2, 1) are studied. For the negative discrete series, two bases of these irreps are considered. One of them corresponds to the reduction U-q(2,1) --> U-q(2) x U(1). The second basis is connected with the reduction U-q(2, 1) --> U(1) x U-q(1, 1). The matrix elements of the U-q(2, 1) generators in both bases are calculated. For the intermediate discrete series, only first type of basis is considered and the q analogs of the Gelfand-Graev formulas are obtained. Also, the transformation brackets connecting the two bases are found for the negative discrete series. (C) 2001 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7788 UR - ISI:000173673700022 L2 - IRREDUCIBLE TENSOR-OPERATORS; CLEBSCH-GORDAN-COEFFICIENTS; ANGULAR-MOMENTUM; TREE TECHNIQUE; U(Q)(3); REPRESENTATIONS; SYMBOLS; SUQ(2) SO - Physics of Atomic Nuclei 2001 ;64(12):2167-2172 4332 UI - 11956 AU - Smith ME AU - Castillo F AU - Gomez F AD - Cornell Univ, Dept Plant Breeding, Ithaca, NY 14853, USAIRGP, Colegio Posgrad, Montecillo, Texcoco, MexicoDole Corp, Choluteca, HondurasSmith, ME, Cornell Univ, Dept Plant Breeding, 252 Emerson Hall, Ithaca, NY 14853 USA TI - Participatory plant breeding with maize in Mexico and Honduras AB - Maize is a staple food crop in many developing countries. However, if seven major maize producing countries are excluded from this group, data indicate that only 34% of the maize area is planted with improved seed despite considerable effort invested in maize breeding. This has led researchers to investigate other options, such as farmer-participatory plant breeding, for delivering the benefits of plant breeding knowledge and technology to farmers in developing countries. This paper describes short-term results from participatory maize breeding studies in Mexico and Honduras. Results from three selection cycles in Mexico suggest that stratified mass selection without pollination control, with selections carried out by researchers in farmers' fields, may be effective at improving yield in farmers' local varieties. In Honduras, mass selection with pollination control, where selections were done by collaborating farmers in their own fields on their own varieties, showed trends (non-significant) towards yield improvement. Farmer selection seemed to offer the greatest yield benefit over experiment station selection on the farm with the lowest yield potential, suggesting that farmer-participatory approaches may be most advantageous in marginal environments where experiment station conditions differ most dramatically from farmers' conditions. These studies highlighted the importance of seed systems knowledge in designing participatory plant breeding programs. For cross-pollinated crops, they also highlighted the need to balance progress from selection and demands on farmers' time and labor in choosing breeding methods. Further work is needed to investigate farmer participatory breeding approaches that can address post-harvest traits MH - Honduras MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000173380600011 L2 - maize;mass selection;participatory plant breeding;Zea mays L.;SELECTION SO - Euphytica 2001 ;122(3):551-565 4333 UI - 13202 AU - Sobell LC AU - Agrawal S AU - Annis H AU - yala-Velazquez H AU - Echeverria L AU - Leo GI AU - Rybakowski JK AU - Sandahl C AU - Saunders B AU - Thomas S AU - Zioikowski M AD - Nova SE Univ, Ctr Psychol Studies, Ft Lauderdale, FL 33314, USACtr Addict & Mental Hlth Serv, Toronto, ON, CanadaUniv Nebraska, Med Ctr, Coll Nursing, Omaha, NE, USAUniv Toronto, Dept Behav Sci, Toronto, ON, CanadaNatl Autonomous Univ Mexico, Fac Psychol, Mexico City 04510, DF, MexicoUniv Med Sci, Dept Adult Psychiat, Poznan, PolandSobell, LC, Nova SE Univ, Ctr Psychol Studies, 3301 Coll Ave, Ft Lauderdale, FL 33314 USA TI - Cross-cultural evaluation of two drinking assessment instruments: Alcohol timeline followback and inventory of drinking situations AB - This article describes the psychometric characteristics of two major assessment instruments used in a World Health Organization (WHO) clinical trial: (a) Alcohol Timeline Followback (TLFB, which assesses daily drinking patterns), and (b) Inventory of Drinking Situations (IDS, which assesses antecedents to "heavy" drinking). Clients (N = 308) were outpatient alcohol abusers from four countries (Australia, Canada, Mexico, and Sweden). Generally, the Alcohol TLFB and IDS were shown to be reliable and valid with outpatient alcohol abusers in four countries. and in three languages. These results suggest that the Alcohol TLFB and the IDS can be used in clinical and research settings with Swedish-, Spanish-, and English-speaking alcohol abusers MH - Canada MH - USA MH - Mexico|Distrito Federal MH - Poland PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 13 U4 - Substance Abuse;Psychiatry;Psychology U5 - J;Article AV - English IS - 1082-6084 UR - ISI:000170045300005 L2 - cross-cultural;alcohol abusers;timeline followback;inventory of drinking situations;BRIEF INTERVENTIONS; RELIABILITY; CONSUMPTION; DRINKERS; VALIDITY; DIPSTICK; TRIAL SO - Substance Use & Misuse 2001 ;36(3):313-331 4334 UI - 12462 AU - Soberon G AU - Laclette JP AU - Serrano-Perez-Grovas A AU - Tapia-Conyer R AU - Valdes-Olmedo JC AU - Jimenez-Sanchez G AD - Mexican Hlth Fdn, FUNSALUD, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, UNAM, Mexico City, DF, MexicoSecretary Hlth, SSA, Mexico City, DF, MexicoJohns Hopkins Univ, Inst Med Genet, Baltimore, MD, USA TI - Development of the first center for genomic medicine in Mexico MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901627 SO - American Journal of Human Genetics 2001 ;69(4):460-460 4335 UI - 14089 AU - Soberon M AU - Morera C AU - Kondorosi A AU - Lopez O AU - Miranda J AD - UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62250, Morelos, MexicoCNRS, Inst Sci Vegetales, F-91198 Gif Sur Yvette, FranceSoberon, M, UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - A purine-related metabolite negatively regulates fixNOQP expression in Sinorhizobium meliloti by modulation of fixK expression AB - 5-aminoimidazole-4-carboxamide nucleotide (AICAR) is a negative effector of cytochrome terminal oxidase cbb3 production in Rhizobium etli, In this work, the effect of AICAriboside (AICAr), the precursor of AICAR on the expression of the Sinorhizobium meliloti fixNOQP operon encoding the symbiotic terminal oxidase cbb3, was analyzed. AICAr reduced the microaerobic induction levels of fixN-lacZ and fixT-lacZ gene fusions 18- and sevenfold:respectively, and both genes were activated by the transcriptional activator FixK, A fucK-lacZ fusion presented 14-fold-reduced induction levels in microaerobic cell cultures in the presence of AICAr, AICAr also reduced three-fold the microaerobic expression levels of the nifA-lacZ fusion, whose expression as well as that of fixK is controlled by the two-component system FixL-FixJ. In contrast, AICAr had no effect on the expression levels of a hemA-lacZ fusion. These data suggest that AICAr prevents fixNOQP induction by the inhibition of fixK transcription MH - France MH - Mexico|Morelos PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000167564100015 L2 - 5-AMINOIMIDAZOLE-4-CARBOXAMIDE RIBONUCLEOTIDE AICAR; TERMINAL OXIDASE CBB(3); RHIZOBIUM-MELILOTI; ESCHERICHIA-COLI; GENE; PROTEIN; OXYGEN; AUXOTROPHS; SUPPLEMENTATION; REQUIREMENT SO - Molecular Plant-Microbe Interactions 2001 ;14(4):572-576 4336 UI - 11174 AU - Soldevila G AU - Castellanos C AU - Malissen M AU - Berg LJ AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoCtr Natl Rech Sci Marseille Luminy, Ctr Immunol, Inst Natl St & Rech Med, F-13228 Marseille 9, FranceUniv Massachusetts, Med Sch, Dept Pathol, Worcester, MA 01655, USASoldevila, G, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Circuito Escolar S-N, Mexico City 04510, DF, Mexico TI - Analysis of the individual role of the TCR zeta chain in transgenic mice after conditional activation with chemical inducers of dimerization AB - Signaling through the TCR/CD3 complex plays a critical role in T-cell development and activation. Gene-targeted mice lacking particular components of this complex show arrested T-cell development in the thymus. As all TCR/CD3 components are required for efficient surface expression of the complex it is difficult to assess the specific signaling role of each receptor component. To overcome this problem, we designed a strategy to examine the specific role(s) of individual receptor chains. A chimeric protein, containing binding domains for chemical inducers of dimerization fused to the cytoplasmic tail of TCR, was generated. Activation of the chimeric receptor after stimulation with chemical dimerizers in Jurkat cells showed tyrosine phosphorylation of the TCRzeta chain chimera, recruitment of phosphorylated Zap70, and generation of NFAT in a reporter assay. Analysis of thymocytes from transgenic mice expressing this chimeric receptor showed that intracytoplasmic crosslinking of the chimera induced tyrosine phosphorylation of the protein, as well as a slow and very weak calcium mobilization response. However, this signaling did not lead to increased expression of activation markers, T-cell proliferation, or apoptosis. In addition, stimulation of thymocytes in suspension or in fetal thymic organ cultures with chemical inducers of dimerization. did not lead to alterations in positive or negative selection. We conclude that signaling through the TCRzeta chain alone is not sufficient to generate downstream events leading to full T-cell activation or thymocyte selection; instead, additional CD3 components must be required to induce a functional response in primary thymocytes and peripheral T cells. (C) 2001 Elsevier Science (USA) MH - France MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology;Immunology U5 - J;Article AV - English IS - 0008-8749 UR - ISI:000175549600003 L2 - T lymphocyte;thymocyte;signal transduction;cellular differentiation;TCR zeta chain;TCR/CD3 complex;T cell receptors;dimerizer;ITAM;transgenic mice;T-CELL-RECEPTOR; SIGNAL-TRANSDUCTION; GENE-EXPRESSION; PROTEIN INTERACTIONS; THYMOCYTE SELECTION; POSITIVE SELECTION; ANTIGEN; LYMPHOCYTES; MOTIFS; LIGANDS SO - Cellular Immunology 2001 ;214(2):123-138 4337 UI - 13196 AU - Sole J AU - Enrique P AD - Univ Barcelona, Fac Geol, E-08028 Barcelona, SpainSole, J, Natl Autonomous Univ Mexico, Inst Geol, Apdo Postal 70-296, Mexico City 04510, DF, Mexico TI - X-ray fluorescence analysis for the determination of potassium in small quantities of silicate minerals for K-Ar dating AB - X-ray fluorescence analyses were used to determine the potassium contents of silicate minerals with K2O concentrations between 1 and 13 wt.%. This method is based on lithium tetraborate fused glass discs with 50 mg of sample at similar to1:120 dilution. The results show that this high-dilution minimises matrix effects and that both precision and accuracy are below 1.5% for all the silicate minerals analysed, whatever their composition. This analytical procedure is useful for K determination in small samples of mineral separates needed to establish K-Ar geochronology, without using acid digestion. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2670 UR - ISI:000170237600014 SO - Analytica Chimica Acta 2001 ;440(2):199-205 4338 UI - 14254 AU - Soler JM AU - Garzon IL AU - Joannopoulos JD AD - MIT, Dept Phys, Cambridge, MA 02139, USAUniv Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoSoler, JM, MIT, Dept Phys, Cambridge, MA 02139, USA TI - Structural patterns of unsupported gold clusters AB - The structure of metal clusters is essential to predict many of their physical and chemical properties. Using first principles density functional calculations it was recently found that even 'magic' cluster sizes, for which very compact and symmetric structures exist, have lower-energy 'disordered' structures. The origin of these structures was shown to lie in the non-pairwise metallic interactions; while the compact ordered geometries are very stable for pair potentials, they are de-stabilized by the tendency of metallic bonds to contract at the surface. Here we identify important patterns of the resulting 'amorphous' structures, showing why they are optimal for the metallic potential, and how they can be used to predict structures for other cluster sizes. (C) 2001 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Spain MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 24 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000167083300010 L2 - nanostructures;crystal structure and symmetry;order-disorder effects;NANOCLUSTERS; NANOCRYSTAL; MOLECULES; POTENTIALS; PARTICLES; STABILITY; RANGE; BULK; DNA SO - Solid State Communications 2001 ;117(10):621-625 4339 UI - 13805 AU - Soliz JG AU - Acebo HL AD - Autonomous Univ State Mexico, CIRA, Fac Engn, Toluca 50130, MexicoUniv Basque Country, Fac Sci, Dept Geodynam, Bilbao, SpainSoliz, JG, Autonomous Univ State Mexico, CIRA, Fac Engn, Cerro Coatepec S-N, Toluca 50130, Mexico TI - A model of cells as practical approach to simulate spring flow in the Itxina karstic aquifer, Basque Country, Spain AB - The aim of this study is to apply a parsimonious hydrologic model to the Itxina karstic aquifer that can predict changes in discharge resulting from variable inputs (recharge). The Itxina Aquifer was divided into four cells corresponding to different recharge areas. Each cell was treated as a tank to characterize the conditions within the cell. In the model, when the reservoir boundaries coincide with the position of the siphons, the signal simulated is sensitive to input pulses of the recharge. This supports the hypothesis that the siphons are the controlling mechanism in the flow system of the aquifer. The good agreement between predicted and measured discharges demonstrates the ability of the model to simulate the flow in the Itxina Aquifer. These results demonstrated that the hydraulic conductivity increases downstream within the aquifer. The hydraulic conductivities obtained by calibration varied between 4.2 x 10(-3) m/s upstream of the aquifer, 6.0 x 10(-2) m/s in the central region, and 9.5 x 10(-1) mls in the lower region of the aquifer. These values seem reasonable because the underground features in the principal caves show that the density of caves increases downstream in the Itxina Aquifer. The simple representation of the system produced results comparable to traditional ground water models with fewer data requirements and calibration parameters MH - Mexico|Estado De Mexico MH - Spain PB - WESTERVILLE: GROUND WATER PUBLISHING CO RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0017-467X UR - ISI:000168446500004 L2 - FRACTURED MEDIA; MASS-TRANSPORT SO - Ground Water 2001 ;39(3):339-347 4340 UI - 13556 AU - Somanathan R AU - Aguilar HR AU - Rivero IA AU - Aguirre G AU - Hellberg LH AU - Yu Z AU - Thomas JA AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoSan Diego State Univ, Dept Chem, San Diego, CA 92182, USASomanathan, R, Inst Tecnol Tijuana, Ctr Grad & Invest, Apdo Postal 1166, Tijuana 22000, BC, Mexico TI - Thermal cyclisation of beta-hydroxyamides to oxazolines AB - Thermal conversion is described of amides derived from erythro and threo ephedrines yields stereospecific oxazolines MH - Mexico|Baja California MH - USA PB - NORTHWOOD: SCIENCE REVIEWS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0308-2342 UR - ISI:000169092900004 L2 - thermal cyclisation;beta-hydroxyamioles;oxazolines SO - Journal of Chemical Research-S 2001 ;(3):92-92 4341 UI - 14112 AU - Song LY AU - Mercado A AU - Desai R AU - George AL AU - Gamba G AU - Mount DB AD - Vanderbilt Univ, Med Ctr, Nashville, TN 37232, USAInst Nacl Nutr Salvador Zubiran, Inst Nacl Ciencias Med, Mexico City 14000, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 14000, DF, Mexico TI - Characterization of hKCC2, the human neuronal-specific K-Cl cotransporter MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438102516 SO - Faseb Journal 2001 ;15(4):A440-A440 4342 UI - 14754 AU - Song S AU - Lopez-Valdivieso A AU - Reyes-Bahena JL AU - Lara-Valenzuela C AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Queensland, JK Mineral Res Ctr, Brisbane, Qld, AustraliaSA de CV, Serv Ind Penoles, Ctr Invest & Desarrollo Tecnol, Monterrey, MexicoSong, S, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Floc flotation of galena and sphalerite fines AB - The flotation of galena and sphalerite fines in the form of flocs, which is termed floc flotation, has been studied in the present work. The flocs formed through hydrophobic flocculation induced by potassium amyl xanthate (PAX) and kinetic energy input. The studies were performed an. single minerals of -20 mum size by using micro-flotation and floc size measurements. Several parameters, including pH, PAX concentration, kerosene addition and stirring strength, have been investigated for their effects on the floc flotation. The results show that the floc flotation closely correlates with the size of flocs. At good operating conditions, the floc flotation of galena and sphalerite fines can reach floatability of 100%, in comparison to conventional flotation obtaining floatability of about 40%. It has been found that a small addition of kerosene greatly improved the floc flotation, saving a large amount of PAX. Also, the floc flotation was tested on the Rey de Plata ore of Guerrero of Mexico, in which some of the metallic (Pb, Zn, Ag, Au, Cu) sulfide minerals are finely disseminated. The beneficiation results have demonstrated that floc flotation not only reduces the losses of the valuable metals in tailing, but also greatly increases the separation efficiency at cleaner flotation steps, producing concentrates with much higher grade and recovery in comparison to conventional flotation. The former effect might be due to the increase in recovery of the valuable minerals fines, and the latter might be attributed to the increase of the flotation rate of valuable mineral, because of floc formation and kerosene addition. (C) 2000 Published by Elsevier Science Ltd. All rights reserved MH - Australia MH - Mexico|Nuevo Leon MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0892-6875 UR - ISI:000165776500007 L2 - sulphide ores;fine particle processing;flocculation;froth flotation;HYDROPHOBIC FLOCCULATION; CARRIER FLOTATION; HEMATITE; COAL; OIL SO - Minerals Engineering 2001 ;14(1):87-98 4343 UI - 14235 AU - Soria AR AU - Liesa CL AU - Mata MP AU - Arz JA AU - Alegret L AU - Arenillas I AU - Melendez A AD - Univ Zaragoza, Dept Ciencias Tierra, E-50009 Zaragoza, SpainUniv Cadiz, Fac Ciencias Mar, Dept Geol, E-11510 Puerto Real, SpainUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Mexico City 67700, DF, MexicoSoria, AR, Univ Zaragoza, Dept Ciencias Tierra, E-50009 Zaragoza, Spain TI - Slumping and a sandbar deposit at the Cretaceous-Tertiary boundary in the El Tecolote section (northeastern Mexico): An impact-induced sediment gravity flow AB - Slumps affecting uppermost Mendez Formation marls, as well as the spherulitic layer and basal part of the sandy deposits of the Cretaceous-Tertiary (K-T) boundary elastic unit, are described at the new K-T El Tecolote section (northeastern Mexico). These K-T elastic deposits represent sedimentation at middle-bathyal water depths in channel and nonchannel or levee areas of reworked materials coming from environments ranging from outer shelf to shallower slope via a unidirectional, high- to low-density turbidite flow. We emphasize the development and accretion of a lateral bar in a channel area from a surging low-density turbidity current and under a high-flow regime. The slumps discovered on land and the sedimentary processes of the K-T elastic unit reflect destabilization and collapse of the continental margin, support the mechanism of gravity flows in the deep sea, and represent important and extensive evidence for the impact effects in the Gulf of Mexico triggered by the Chicxulub event MH - Mexico|Distrito Federal MH - Spain PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 27 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000167184200010 L2 - K-T boundary;slumping;sand bars;gravity flows;Mexico SO - Geology 2001 ;29(3):231-234 4344 UI - 12853 AU - Soriano VE AU - Blackall PJ AU - Dabo SM AU - Tellez G AU - Garcia-Delgado GA AU - Fernandez RP AD - Univ Autonoma Estado Mexico, Fac Med Vet & Zootecn, Ctr Invest & Estudios Avanzados Salud Anim, Toluca 50090, MexicoQueensland Dept Primary Ind, Anim Res Inst, Agcy Food & Fibre Sci, Yeerongpilly, Qld 4105, AustraliaOklahoma State Univ, Coll Vet Med, Dept Vet Pathol, Stillwater, OK 74078, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Prod Anim Aves, Mexico City 45010, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Microbiol & Inmunol, Mexico City 45010, DF, MexicoFernandez, RP, Univ Autonoma Estado Mexico, Fac Med Vet & Zootecn, Ctr Invest & Estudios Avanzados Salud Anim, Toluca 50090, Mexico TI - Serotyping of Haemophilus paragallinarum isolates from Mexico by the Kume hemagglutinin scheme AB - A total of 42 isolates of Haemophilus paragallinarum from Mexico were serotyped by the Kume hemagglutinin scheme. Serovars A-1, A-2, B-1, and C-2 were recognized among 11 (26.2%), 7 (16.6%), 4 (9.5%), and 14 (33.3%) isolates, respectively. A further six isolates (14.3%) showed hemagglutinating activity but could not be classified into any serovar. Commercial vaccines containing Kume serovars A-1, A-2, B-1, and C-2 may provide better protection than those bi- or trivalent infectious coryza vaccines currently used in Mexico MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 6 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000171146300018 L2 - Haemophilus paragallinarum;hemagglutinin;serotyping;infectious coryza;HEMOPHILUS-PARAGALLINARUM; SEROLOGICAL CLASSIFICATION; INFECTIOUS CORYZA; PROPOSAL; SEROVAR; STRAINS SO - Avian Diseases 2001 ;45(3):680-683 4345 UI - 12885 AU - Sosa M AU - Carneiro AAO AU - Colafemina JF AU - Baffa O AD - FFCLRP Univ Sao Paulo, Dept Fis & Matemat, BR-14040901 Ribeirao Preto, SP, BrazilFMRP Univ Sao Paulo, Dept Otorrinolaringol, BR-14049900 Ribeirao Preto, BrazilUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoBaffa, O, FFCLRP Univ Sao Paulo, Dept Fis & Matemat, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP, Brazil TI - A new magnetic probe to study the vibration of the tympanic membrane AB - A new magnetic probe to study the vibration of the human tympanic membrane is proposed. The method is based on the measurement of the magnetic flux changes produced by the vibrations of a small magnet attached to the tympanic membrane. The system was evaluated with respect to its applicability to detect displacement amplitudes in the tympanum by measurements performed in a excised temporal bone. A sensitivity sufficient to detect vibrations of the order of 50 x 10(-9) in was observed for a wide range of frequencies between 200 Hz-5.0 kHz. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000170628400361 L2 - magnetoresistive sensor;permanent magnet;tympanic membrane;vibration amplitude;MIDDLE SO - Journal of Magnetism and Magnetic Materials 2001 ;226():2067-2069 4346 UI - 13690 AU - Sosa N AU - Peralta RD AU - Lopez RG AU - Ramos LF AU - Katime I AU - Cesteros C AU - Mendizabal E AU - Puig JE AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Pais Vasco, Dept Quim Fis, E-48080 Bilbao, SpainPuig, JE, Univ Guadalajara, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - A comparison of the characteristics of poly(vinyl acetate) latex with high solid content made by emulsion and semi-continuous microemulsion polymerization AB - A method to produce poly(vinyl acetate) lattices with high-solid content (ca. 30 wt.%) without losing the characteristics of the microemulsion-made particles is presented. The method is based on the multi-stage addition of monomer to a latex produced by the polymerization of 3 wt.% vinyl acetate in three-component microemulsions stabilized with low concentrations (<1 wt.%) of the anionic surfactant, Aerosol OT, to produce lattices with up to 30 wt% solids. The results demonstrated that the poly(vinyl acetate) in the high solid-content latex has much smaller molar masses than the poly(vinyl acetate) in emulsion-made lattices with similar solid content. Also the microemulsion-made lattices contain particles two- to three-fold smaller than those obtained by emulsion polymerization. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Mexico|Jalisco MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 16 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000168682700028 L2 - microemulsion polymerization;high-solid content latex;poly(vinyl acetate);3-COMPONENT ANIONIC MICROEMULSIONS; FREE-RADICAL POLYMERIZATION; VINYL-ACETATE; TETRAHYDROFURFURYL METHACRYLATE; STYRENE; BROMIDE; SYSTEM; WATER SO - Polymer 2001 ;42(16):6923-6928 4347 UI - 14057 AU - Sotelo-Lerma M AU - Zingaro RA AU - Castillo SJ AD - Texas A&M Univ, Dept Chem, College Stn, TX 77843, USAUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoUniv Sonora, Dept Fis, Hermosillo 83000, Sonora, MexicoUniv Sonora, DIFUS, Hermosillo 83000, Sonora, MexicoSotelo-Lerma, M, Texas A&M Univ, Dept Chem, College Stn, TX 77843, USA TI - Preparation of CdTe coatings using the chemical deposition method AB - CdTe coatings have been prepared by the reaction between films of cadmium hydroxide deposited on glass and a solution prepared by the dissolution of tellurium in hydroxymethane sulfinic acid. The films of CdTe having thicknesses in the range of 1 mum have been deposited by immersing the cadmium hydroxide coatings in an alkaline solution containing a tellurium compound at 5 degreesC, which is warmed to 70 degreesC. Annealing at ca. 150 degreesC for 24 h gives highly crystalline, cubic CdTe. The preparation of an aqueous solution containing tellurium, which remains stable, is essential for the success of the process. Conditions for the preparation of such a solution are described. Details for the preparation of thin films of Cd(OH)(2) on glass, essential for the success of the process, are also described. The CdTe obtained was cubic, has a band gap energy of 1.51 eV, but does not display high photosensitivity. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000167644500010 L2 - cadmium telluride;rongalite;ion exchange;semiconductors;ION-EXCHANGE REACTION; THIN-FILMS; SPRAY DEPOSITION; TELLUROAMIDES; SELENOAMIDES SO - Journal of Organometallic Chemistry 2001 ;623(1-2):81-86 4348 UI - 12624 AU - Soto E AU - Chavez H AU - Valli P AU - Benvenuti C AU - Vega R AD - Univ Autonoma Puebla, Inst Fisiol, Puebla 72570, MexicoUniv Autonoma Puebla, Fac Estomatol, Puebla 72570, MexicoUniv Pavia, Dept Pharmacol & Physiol Sci, Pavia, ItalyFormenti, Milan, ItalySoto, E, BUAP, Inst Fisiol, Apartado Postal 406, Puebla 72000, Mexico TI - Betahistine produces post-synaptic inhibition of the excitability of the primary afferent neurons in the vestibular endorgans AB - Betahistine has been used to treat several vestibular disorders of both central and peripheral origin. The objective of this work was to study the action of betahistine in the vestibular endorgans. Experiments were done in wild larval axolotl (Ambystoma tigrinum). Multiunit extracellular recordings were obtained from the semicircular canal nerve using a suction electrode, Betahistine (10 muM to 10 mM; n = 32) inhibited the basal spike discharge of the vestibular afferent neurons with an IC50 of 600 muM. To define the site of action of betahistine, its interactions with the nitric oxide synthase inhibitor N-G-nitro-L-arginine (3 muM) and with the cholinergic antagonists atropine (10 muM; n = 3) and d-tubocurarine (10 muM; n = 3) were studied. The action of betahistine when co-administered with these drugs was the same as that in control experiments, indicating that its effects did not include nitric oxide production or the activation of cholinergic receptors. In contrast, 0.01-1 mM betahistine reduced the excitatory action of kainic acid (10 muM; n = 6) and quiscualic acid (I muM; n = 13) These results indicate that the action of betahistine on the spike discharge of afferent neurons seems to be due to a post-synaptic inhibitory action on the primary afferent neuron response to the hair cell neurotransmitter MH - Italy MH - Mexico|Puebla PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 0 U4 - Otorhinolaryngology U5 - J;Article AV - English IS - 0001-6489 UR - ISI:000171625300005 L2 - afferent transmission;Ambystoma tigrinum;excitatory amino acids;histamine;Meniere's disease;nitric oxide;quiscualic acid;synapse;vertigo;MOTION SICKNESS; DOUBLE-BLIND; INNER-EAR; RECEPTORS; VERTIGO; HISTAMINE; SYSTEM; DRUGS SO - Acta Oto-Laryngologica 2001 ;():19-24 4349 UI - 12268 AU - Soto G AU - Samano EC AU - Machorro R AU - Farias MH AU - Cota-Araiza L AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Study of composition and bonding character of CNx films AB - A series of samples were prepared by reactive laser ablation of a graphite target in nitrogen environment. The CNx films were annealed from room temperature to 900 degreesC, and in situ analyzed by electron energy loss spectroscopy (EELS), Auger electron spectroscopy, X-ray photoelectron spectroscopy and temperature desorption spectroscopy (TDS). A [N]/[C] ratio of 0.43 was determined and decreases notoriously as the annealing temperature increases. The peak shapes and intensities in the N-1s and C-1s regions are similar to those reported by other research groups. Small satellite peaks were observed in the N-1s and C-1s regions, corresponding to first- and second-order inelastic energy losses of the main peaks. These losses were detected also by EELS with an energy of 4 eV and assigned to the pi-pi (*) plasmon. This resonance is distinctive of non-localized electrons in an sp(2)-hybridized carbon orbital. Thereafter, the main N-1s and C-1s peaks could be assigned to atoms in a six- and five-member rings. Moreover, the films were easily degraded by the thermal treatment and the main desorption product determined by TDS was found to be C2N2. We concluded that the most probable structure is one where N atoms dope graphite-like carbon layers by substitution, causing three-dimensional polymerization reactions, with chemical states similar to Upilex, Kapton and other polyimides. (C) 2001 Elsevier Science B.V All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000172506500010 L2 - carbon nitride;polyimides;polymerization;chemical state;thermal treatment;CARBON NITRIDE FILMS; ENERGY-LOSS SPECTROSCOPY; AMORPHOUS-CARBON; ELECTRONIC-STRUCTURE; LASER-ABLATION; PHOTOELECTRON-SPECTROSCOPY; THIN-FILMS; NITROGEN; GRAPHITE; DIAMOND SO - Applied Surface Science 2001 ;183(3-4):246-258 4350 UI - 13313 AU - Soto G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Electron spectroscopic identification of carbon species on CNx films AB - Carbon species produced during reactive laser deposition of carbon nitride (CNx) films were characterized with Auger, X-ray photoelectron and electron energy-loss spectroscopies. The pi --> pi * and sigma + pi plasmons show that the carbon atoms are in sp(2) configuration, and the absence of losses in the 26-30 eV is indicative of the non-existence of spl-hybridized carbon. When the pi loss is applied to N-1s or C-1s photoelectrons, the asymmetric tail in the XPS spectra is satisfactorily reproduced. With this analysis, the minor peaks are assigned to the inelastic losses, and the two main peaks to nitrogen, in substitution on sp(2)-hybridized carbon rings, developing pyridine and pyrrole-like configurations. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000169801200008 L2 - carbon nitride;CNx;hybridization;pyridine;pyrrole;EELS;XPS;ENERGY-LOSS SPECTROSCOPY; NITRIDE THIN-FILMS; LASER ABLATION; NITROGEN; DIAMOND; BETA-C3N4; GROWTH; BETA-SI3N4; GRAPHITE SO - Materials Letters 2001 ;49(6):352-356 4351 UI - 13462 AU - Soto H AU - Dominguez JC AU - Erasme D AU - Guekos G AD - CICESE Res Ctr, Div Appl Phys, Ensenada 22860, Baja California, MexicoEcole Natl Super Telecommun, Dept Elect & Commun, CNRS, URA 820, F-75634 Paris 13, FranceSwiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, SwitzerlandSoto, H, CICESE Res Ctr, Div Appl Phys, Ensenada 22860, Baja California, Mexico TI - Demonstration of an all-optical switch using cross-polarization modulation in semiconductor optical amplifiers AB - We propose an all-optical switch based on cross-polarization; modulation in a semiconductor optical amplifier (SOA), operating at 2.5 Gbits/s with an NRZ pseudorandom data sequence. The effect consists of an induced modification of the birefringence and waveguide eigenmodes of an SOA produced bq a strong control beam. (C) 2002 John Wiley & Sons, Inc MH - France MH - Mexico|Baja California MH - Switzerland PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000169337300022 L2 - semiconductor optical amplifiers;all-optical switch;cross-polarization modulation SO - Microwave and Optical Technology Letters 2001 ;29(3):205-208 4352 UI - 13759 AU - Soto H AU - Erasme D AU - Zitlalpopoca J AD - CICESE, Div Appl Phys, Res Ctr, Ensenada 22860, Baja California, MexicoEcole Natl Super Telecommun, Dept Elect & Commun, CNRS URA 820, F-75634 Paris 13, FranceSoto, H, CICESE, Div Appl Phys, Res Ctr, Ensenada 22860, Baja California, Mexico TI - Polarization-insensitive wavelength conversion with a constant output linear polarization allowing the realization of an active polarization controller AB - In this work, we demonstrate theoretically and experimentally a technique allowing us to realize a polarization-insensitive wavelength conversion with an output beam whose polarization state is unique and linear for all input signal polarization states. (C) 2001 John Wiley & Sons. Inc MH - France MH - Mexico|Baja California PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000168463000018 L2 - wavelength conversion;active polarization controller;four-wave mixing in semiconductor optical amplifiers;SEMICONDUCTOR OPTICAL AMPLIFIER; LASER AMPLIFIERS; COMPONENTS; CONVERTER SO - Microwave and Optical Technology Letters 2001 ;29(5):344-348 4353 UI - 13892 AU - Soto H AU - Erasme D AU - Guekos G AD - CICISE, Ensenada 22860, Baja California, MexicoEcole Natl Super Telecommun, Dept Commun Electron, URA 0820, CNRS, F-75634 Paris 13, FranceSwiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, SwitzerlandSoto, H, CICISE, Km 107,Carrtera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - 5-gb/s XOR optical gate based on cross-polarization modulation in semiconductor optical amplifiers AB - In this letter, we demonstrate a new design for a XOR optical gate operating in the GHz regime using the cross-polarization modulation effect in a semiconductor optical amplifier. Dynamic and optically controlled polarization rotation in the devices is used to control the output power of the device. Static extinction ratio of the order of 20 dB can be obtained, Bit rate doubling at rate of 1.2 and 2.5 Gb/s have been demonstrated MH - France MH - Mexico|Baja California MH - Switzerland PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 27 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000168159700025 L2 - cross-polarization-modulation;logic gate;optical communication;optical signal processing;semiconductor optical amplifier;XOR SO - Ieee Photonics Technology Letters 2001 ;13(4):335-337 4354 UI - 11588 AU - Soto JM AU - Sanchez E AU - Uvalle JX AU - Yanez RM AU - Montes F AU - Ruiz JM AU - Romero L AD - Univ Autonoma Chihuahua, Fac Ciencias Agrotecnol, Chihuahua 31150, MexicoUniv Granada, Fac Ciencias, Dept Biol Vegetal, E-18071 Granada, SpainSoto, JM, Univ Autonoma Chihuahua, Fac Ciencias Agrotecnol, AP 24, Chihuahua 31150, Mexico TI - Pre-harvest application dosages of aminoethoxyvinylglycine in relation to ripening, fruit drop and watercore in 'Red Delicious' and 'Golden Delicious' apples AB - This study evaluates the effect of aminoethoxyvinylglycine on ripening, fruit drop and water core in 'Red Delicious' (RD) and 'Golden Delicious' (GD) apples. Four weeks before harvest, the following treatments were applied to the respective sections of the trees: TO (no application; control), T1 (74.1 g a.i. of AVG-3168), T2 (98.8 g ad. of AVG-3168) and T3 (123.5 g a.i. of AVG-3168/ ha in 1000 L of water). Commercial-quality fruit were harvested on 5 and 10 September for 'RD' and 'GD', respectively (to coincide with local harvest dates), and a sampling was made 21 days after commercial harvest (dach). The results were: 1) AVG treatments, especially the high dosage (T3) benefited the ripening indices (fruit firmness, soluble solids, content starch index and sugar/acid relationship) in both varieties in comparison with T0; ii) the AVG treatments, particularly T3 and T2 in 'RD' and 'GD', respectively, strongly reduced fruit drop and water core in comparison with control; and, iii) ripening pattern was discernibly different in the two varieties; thus the medium AVG dosage (T2) is recommended for 'GD' and the high dosage (T3) for 'RD', based on the positive yield results at 21 dach MH - Mexico|Chihuahua MH - Spain PB - VICENTE LOPEZ (BA): FUNDACION ROMULO RAGGIO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9457 UR - ISI:000174249900020 L2 - pre-harvest;aminoethoxyvinylglycine;ripening;fruit drop;watercore;apples;STORAGE BEHAVIOR; MCINTOSH APPLES; 1-AMINOCYCLOPROPANE-1-CARBOXYLIC ACID; ETHYLENE; DAMINOZIDE; PACLOBUTRAZOL; MATURITY SO - Phyton-International Journal of Experimental Botany 2001 ;():171-178 4355 UI - 12340 AU - Sousa JE AU - Morice MC AU - Serruys PW AU - Fajadet J AU - Perin M AU - Hayashi EB AU - Colombo A AU - Schuler G AU - Barragan P AU - Bode C AD - Inst Dante Pazzanese Cardiol, Sao Paulo, BrazilInst Cardiovasc Paris Sud, Massy, FranceUniv Hosp Dijkzigt, Thoraxctr, NL-3015 GD Rotterdam, NetherlandsClin Pasteur, Toulouse, FranceUniv Sao Paulo, Inst Heart, INCOR, Sao Paulo, BrazilInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoCtr Cuore Columbus, Milan, ItalyUniv Leipzig, Ctr Heart, D-7010 Leipzig, GermanyCtr Hosp Prive Beauregard, Marseille, France TI - The RAVEL study: A randomized study with the sirolimus coated BX velocity balloon-expandable stent in the treatment of patients with de novo native coronary artery lesions MH - Brazil MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000171895002180 SO - Circulation 2001 ;104(17):463-463 4356 UI - 13119 AU - Sperandio V AU - Torres AG AU - Giron JA AU - Kaper JB AD - Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201, USABenemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Puebla, MexicoKaper, JB, Univ Maryland, Sch Med, Ctr Vaccine Dev, 685 W Baltimore St,Room 480, Baltimore, MD 21201 USA TI - Quorum sensing is a global regulatory mechanism in enterohemorrhagic Escherichia coli O157 : H7 AB - Enterohemorrhagic Escherichia coli (EHEC) O157:H7 is responsible for outbreaks of bloody diarrhea and hemolytic-uremic syndrome in many countries. EHEC virulence mechanisms include the production of Shiga toxins (Stx) and formation of attaching and effacing (AE) lesions on intestinal epithelial cells. We recently reported that genes involved in the formation of the AE lesion were regulated by quorum sensing through autoinducer-2, which is synthesized by the product of the luxS gene. In this study we hybridized an E. coli gene array with cDNA synthesized from RNA that was extracted from EHEC strain 86-24 and its isogenic luxS mutant. We observed that 404 genes were regulated by luxS at least fivefold, which comprises approximately 10% of the array genes; 235 of these genes were up-regulated and 169 were down-regulated in the wild-type strain compared to in the luxS mutant. Down-regulated genes included several involved in cell division, as well as ribosomal and tRNA genes. Consistent with this pattern of gene expression, the luxS mutant grows faster than the wild-type strain (generation times of 37.5 and 60 min, respectively, in Dulbecco modified Eagle medium). Up-regulated genes included several involved in the expression and assembly of flagella, motility, and chemotaxis. Using operon::lacZ fusions to class I, II, and III flagellar genes, we were able to confirm this transcriptional regulation. We also observed fewer flagella by Western blotting and electron microscopy and decreased motility halos in semisolid agar in the luxS mutant. The average swimming speeds for the wild-type strain and the luxS mutant are 12.5 and 6.6 mum/s, respectively. We also observed an increase in the production of Stx due to quorum sensing. Genes encoding Stx, which are transcribed along with lambda -like phage genes, are induced by an SOS response, and genes involved in the SOS response were also regulated by quorum sensing. These results indicate that quorum sensing is a global regulatory mechanism for basic physiological functions of E. coli as well as for virulence factors MH - USA MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 144 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000170349200030 L2 - VIBRIO-HARVEYI; CELL-DIVISION; SHIGA TOXIN; SALMONELLA-TYPHIMURIUM; GENES; EXPRESSION; SEQUENCE; SYSTEM; LUMINESCENCE; BACTERIA SO - Journal of Bacteriology 2001 ;183(17):5187-5197 4357 UI - 12188 AU - Spooner DM AU - Van den Berg RG AU - Rivera-Pena A AU - Velguth P AU - Del Rio A AU - Salas-Lopez A AD - Univ Wisconsin, USDA ARS, Vegetable Crops Res Unit, Dept Hort, Madison, WI 53706, USAUniv Wageningen & Res Ctr, Plant Taxon Grp, NL-6700 ED Wageningen, NetherlandsINIFAP, Program Nacl Papa, Mexico City, DF, MexicoCIP, Lima 12, PeruUniv Wisconsin, Dept Hort, Madison, WI 53706, USASpooner, DM, Univ Wisconsin, USDA ARS, Vegetable Crops Res Unit, Dept Hort, 1575 Linden Dr, Madison, WI 53706 USA TI - Taxonomy of Mexican and Central American members of Solanum series Conicibaccata (sect. Petota) AB - Members of Solanum series Conicibaccata in Mexico and Central America are very similar. All are tetraploids (2n = 4x = 48). Recent authors have recognized three or four species: S. agrimonifolium, S. woodsonii, S, longiconicum (sometimes included in the next), and S. oxycarpum. We had difficulty distinguishing these species in the herbarium, and needed to resolve species boundaries for ongoing floristic studies. We studied this group in the field throughout Mexico, Guatemala, Costa Rica, and Panama, grew collections in the greenhouse, studied herbarium specimens, determined ploidy levels through flow cytometry, and generated molecular data using Random Amplified Polymorphic DNA. Molecular data distinguish S, agrimonifolium, S. longiconicum, and S. oxycarpum. Solanum woodsonii was not available for molecular analysis. All four species can be distinguished morphologically, but only by leaf character states that overlap in range, by pubescence differences that are best observed in living specimens, and by a seed spot character that is only evident on living or recently gathered specimens MH - Mexico|Distrito Federal MH - Netherlands MH - Peru MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000172681500006 L2 - SPECIES BOUNDARIES; MOLECULAR-DATA; WILD POTATOES; SOLANACEAE; REEXAMINATION; RESOURCES SO - Systematic Botany 2001 ;26(4):743-756 4358 UI - 12425 AU - Staia MH AU - Fragiel A AU - Cruz M AU - Carrasquero E AU - Campillo B AU - Perez R AU - Constantino M AU - Sudarshan TS AD - Cent Univ Venezuela, Sch Met & Mat Sci, Caracas 1041A, VenezuelaUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoMat Modificat Inc, Fairfax, VA 22031, USAStaia, MH, Cent Univ Venezuela, Sch Met & Mat Sci, Apartado 47283, Caracas 1041A, Venezuela TI - Characterization and wear behavior of pulsed electrode surfacing coatings AB - Pulsed electrode surfacing (PES), which is a micro-welding process, was adopted for depositing a sintered electrode of a mixture of TiC + 2%B + 2% Fe, on an AISI 8030 steel substrate. Different circuits were used and the deposition was carried out during 50 mus, with pulses having a current amplitude of 50 A and different frequencies of 50, 75 and 100 Hz. Sample characterization has been performed by using scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). Ball-on-disc tests were carried out to determine the friction and wear properties for every processing condition. The tests were conducted under non-lubricated conditions, in air with a relative humidity of 50 +/- 2% and ambient temperature of 24 +/- 1 degreesC. Alumina balls of 6 mm diameter were loaded with a normal force of 5 N. The specimens were rotated there at a velocity of 0.1 in s(-1) for a sliding distance of 1000 m. It was determined that the steady-state friction coefficients did not vary with the deposition parameters (mu (average) = 0.53) although the running in friction coefficient values were different, due to variation in the average roughness, R-a, of the treated samples. The wear resistance was evaluated by calculating the wear factor, k, considering that the wear volume is linearly proportional to the load and the sliding distance. Wear scar morphologies, on both coatings and alumina balls, were examined by using SEM and X-ray elemental mapping in order to establish the wear mechanism. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA MH - Venezuela PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Mechanical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0043-1648 UR - ISI:000172012900029 L2 - pulse electrode surfacing;sliding wear;alumina wear;TiC coatings;AIR-ARC DEPOSITION; EVOLUTION; STEEL SO - Wear 2001 ;250():1051-1060 4359 UI - 13778 AU - Stark LR AU - Delgadillo C AD - Univ Nevada, Dept Biol Sci, Las Vegas, NV 89154, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoStark, LR, Univ Nevada, Dept Biol Sci, 4505 Maryland Pkwy, Las Vegas, NV 89154 USA TI - Rhizoautoicous Aloina bifrons in the Mojave Desert, a possible adaptation to increase spore production AB - A re-examination of populations of Aloina bifrons from the Mojave Desert of Nevada was prompted by observations of frequent sporophytic populations. Sporophytic populations are unusual for xeric dioicous species. Aloina bifrons, previously described as dioicous, was found to be occasionally rhizoautoicous. Ramets bearing perichaetia and ramets bearing perigonia were at times connected beneath the ground surface by single rhizoids, rhizoid strands, or by masses of rhizoids. Rhizoautoicy probably functions in increasing spore production in environments unconducive to fertilization MH - Mexico|Distrito Federal MH - USA PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000168495900011 L2 - MOSS BRYUM-ARGENTEUM; SEX-RATIOS; EXPRESSION; POTTIACEAE; ANTARCTICA; DISPERSAL SO - Bryologist 2001 ;104(1):104-108 4360 UI - 11016 AU - Stedeford T AU - Cardozo-Pelaez F AU - Vultaggio B AU - Muro-Cacho C AU - Luzardo GE AU - Harbison RD AD - James A Haley Vet Hosp, Res Serv, Tampa, FL 33612, USAUniv S Florida, Coll Med, Dept Neurol, Tampa, FL 33612, USAUniv Autonoma Guadalajara, Dept Med, Guadalajara, Jalisco, MexicoUniv S Florida, Coll Med, H Lee Moffitt Canc Ctr & Res Inst, Dept Oncol, Tampa, FL 33612, USAUniv S Florida, Coll Publ Hlth, Dept Environm & Occupat Hlth, Tampa, FL 33612, USAHarbison, RD, James A Haley Vet Hosp, Res Serv, Tampa, FL 33612, USA TI - alpha(1)-adrenergic receptors and their significance to chemical-induced nephrotoxicity - A brief review AB - Stimulation of a-adrenergic receptors by cold stress or adrenergic agents has been shown to potentiate the toxicity of numerous toxicants. Several lines of evidence indicate that this interaction is dependent on glutathione depression and increased cytosolic Ca2+ concentrations produced by alpha(1)-adrenergic compounds. In this report, evidence is provided in support of the mechanism of adrenoreceptor-mediated potentiation of nephrotoxicity. alpha(1)-adrenergic agonists are shown to potentiate the toxicity of nephrotoxicants that exert their toxic effects via glutathione conjugation or Ca2+ deregulation. This review summarizes the effects of the alpha(1)-adrenergic agonist, phenylephrine, at enhancing the toxicity of 2-bromohydroquinone, 1,2-dibromoethane, and cis-diammineplatinum(II) dichloride MH - Mexico|Jalisco MH - USA PB - WESTBURY: P J D PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Pathology;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 1078-0297 UR - ISI:000175915100005 L2 - ALPHA-ADRENERGIC AGONISTS; PERFUSED RAT-LIVER; INDUCED HEPATOTOXICITY; INOSITOL TRISPHOSPHATE; BROMOBENZENE; STIMULATION; CISPLATIN; ACTIVATION; ANTAGONISM; BINDING SO - Research Communications in Molecular Pathology and Pharmacology 2001 ;110(1-2):59-72 4361 UI - 13075 AU - Steffen W AU - Lopez JA AU - Lim A AD - Univ Guadalajara, Inst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Ensenada 22800, Baja California, MexicoUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandSteffen, W, Univ Guadalajara, Inst Astron & Meteorol, Ave Vallarta 2602, Guadalajara 44130, Jalisco, Mexico TI - FLIERs as stagnation knots from post-AGB winds with polar momentum deficiency AB - We present an alternative model for the formation of fast low-ionization emission regions (FLIERS) in planetary nebulae that is able to account for many of their attendant characteristics and to circumvent the problems of the collimation/formation mechanisms found in previous studies. In this model, the section of the stellar wind flowing along the symmetry axis carries less mechanical momentum than that at higher latitudes and temporarily develops a concave or inverted shock geometry. The shocked ambient material is thus refracted toward the symmetry axis, instead of away from it, and accumulates in the concave section. The reverse is true for the outflowing stellar wind, which in the reverse shock is refracted away from the axis. It surrounds the stagnation region of the bow shock and confines the trapped ambient gas. The latter has time to cool and is then compressed into a dense "stagnation knot" or "stagnation jet." In the presence of a variable stellar wind these features may eventually overrun the expanding nebular shell and appear as detached FLIERS. We present representative two- and three-dimensional hydrodynamic simulations of the formation and early evolution of stagnation knots and jets and compare their dynamical properties with those of FLIERS in planetary nebulae MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Jalisco PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000170425300022 L2 - hydrodynamics;ISM : jets and outflows;ISM : kinematics and dynamics planetary;nebulae : general;PLANETARY-NEBULA MYCN-18; HUBBLE-SPACE-TELESCOPE; COLLIMATED OUTFLOWS; DRIVEN WINDS; CENTRAL STAR; BIPOLAR; JETS; MICROSTRUCTURES; ENVIRONMENT; SIMULATION SO - Astrophysical Journal 2001 ;556(2):823-829 4362 UI - 13437 AU - Steiner JJ AU - de los Santos GG AD - USDA ARS, Natl Forage Seed Prod Res Ctr, Corvallis, OR 97331, USAColegio Postgrad Ciencias Agr, Ctr Genet, Montecillo 56230, Texcoco, MexicoSteiner, JJ, USDA ARS, Natl Forage Seed Prod Res Ctr, 3450 SW Campus Way, Corvallis, OR 97331 USA TI - Adaptive ecology of Lotus corniculatus L. genotypes: I. Plant morphology and RAPD maker characterizations AB - Birdsfoot trefoil (Lotus corniculatus L.) is a highly variable and widely distributed Old-World perennial forage legume found in wild and naturalized populations throughout temperate regions of Europe, Asia Minor, North Africa, North and South America, Australia, and New Zealand, Understanding the relationships among birdsfoot trefoil morphologic, ecogeographic, and genetic characteristics may provide insights for better utilizing exotic germplasm. The objectives of this research were to (i) compare morphologic and random amplified polymorphic DNA (RAPD) classifications of 28 exotic and ecologically diverse genotypes from the USDA National Plant Germplasm System (NPGS) birdsfoot trefoil collection, and (ii) determine the relationships between genotype classifications and collecting-site eco-geographic features. Eighteen morphologic characteristics, 130 RAPD bands, and eight collecting-site ecogeographic characteristics were used fo classify the genotypes. The relatedness of genetic, morphologic, ecologic and geographic distances among the genotypes was measured using the product moment correlation. Genotype morphology. was related fo collecting-site distances from one another and ecologic similarity. Genetic relatedness was also associated with collecting-site ecology, and specific morphologic characteristics were associated with different ecogeographic features. The similarity between the genetic and ecologic classifications suggested that genotypes adapted fo similar habitats, even if geographically distant, have acquired similar phenotypes. Since RAPD descriptors were associated with the ecologic similarity of genotype collecting sites but not with their geographic closeness, classifications of birdsfoot trefoil should rely on both ecogeographic and morphologic characteristics of accessions MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000169469800039 L2 - CLASSIFICATION; COMPLEX; ORIGIN SO - Crop Science 2001 ;41(2):552-563 4363 UI - 12802 AU - Stenkin YV AU - Valdes-Galicia JF AU - Hurtado A AU - Musalem O AD - Russian Acad Sci, Inst Nucl Res, Moscow 117312, RussiaUNAM, Inst Geofis, Mexico City, DF, MexicoStenkin, YV, Russian Acad Sci, Inst Nucl Res, 60Th October Anniversary Prospect 7, Moscow 117312, Russia TI - Study of "neutron bursts" with Mexico City neutron monitor AB - A search was made for abnormal high multiplicity neutron events, with the combined array of a 6NM64 neutron supermonitor and eight plastic scintillators installed in Mexico City. Some evidences were presented in the last years for such events [Akad. Nauk, Ser. Fiz. 61 (3) (1997) 486; Nucl. Phys. B (Proc. Suppl.) 75A (1999) 333], but their existence was not established beyond any doubt, nor the conditions under which they occur. Our results show the existence of very high multiplicity events in coincidence with high counting rates of the plastic scintillators during several milliseconds. A detailed consideration of the experiment and data on the multiplicities as well as the temporal distributions of the pulses are presented. We propose that the explanation of the peculiar pulse time distributions in the detectors in such events may be found in neutron physics known processes rather than in delayed extensive air showers (EAS) component phenomena as claimed in [Nucl. Phys. B (Proc. Suppl.) 75A (1999) 333]. On the other hand, the origin of these EAS with very high multiplicity of neutrons is a question that remains unanswered. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0927-6505 UR - ISI:000171207700005 SO - Astroparticle Physics 2001 ;16(2):157-168 4364 UI - 12152 AU - Stepanian JA AU - Green RF AU - Foltz CB AU - Chaffee F AU - Chavushyan VH AU - Lipovetsky VA AU - Erastova LK AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoKitt Peak Natl Observ, Natl Opt Astron Observ, Tucson, AZ 85726, USAUniv Arizona, MMT Observ, Tucson, AZ 85721, USAWM Keck Observ, Kamuela, HI 96743, USAInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, RussiaByurakan Astrophys Observ, Byurakan 378433, Aragatsptm, ArmeniaIsaac Newton Inst Chile, Armenian Branch, Byurakan, ArmeniaStepanian, JA, Natl Autonomous Univ Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - Spectroscopy and photometry of stellar objects from the Second Byurakan Survey AB - The results of spectroscopic observations of 202 stellar objects, and photometric observations of 171, from the Second Byurakan Survey (SBS) are reported. The SBS sample has proved to be a rich source of newly identified quasars, Seyfert-type galaxies, degenerate stars, and hot subdwarfs. In this subsample we have identified 71 new QSOs; one BL Lacertae object; one Seyfert 1 galaxy; one LINER; one blue compact galaxy; 31 white dwarfs (WDs), 25 of DA type and six of DB type; 26 subdwarfs; 11 horizontal-branch B-type, 11 normal/horizontal-branch, 18 G-type, and 11 F-type stars; 10 objects with composite spectra; two cataclysmic variables; and six objects with continuous spectra. Among the 71 QSOs, we have found three broad absorption line QSOs, namely, SBS 1139 + 534, 1524 + 517, and 1524 + 491, and one damped Ly alpha QSO, SBS 1425 + 606. The very luminous objects have visual magnitudes in the range 15.9 < V < 16.9, redshifts 2.667 M-V > -31.5. A number of the low-redshift SBS QSOs show strong Fe II complexes at rest wavelengths of 4570, 5190, and 5320 Angstrom. We present accurate positions, spectral classifications, and magnitudes for all objects. The redshifts, equivalent widths, and spectra for QSOs and emission-line galaxies are given, as are some typical spectra for hot stars. The vast majority (63%) of stellar objects selected in the SBS turned out to be WDs (36%) and sdB subdwarfs (27%). Only similar to5%-7% of objects with B<16.4 and 13% with B similar to 17.0 were identified as QSOs. In total, 470 QSOs and similar to 500 hot stars were discovered in the course of the SBS. The lower limit on the surface density of bright QSOs in the redshift range 0.3 2. This provides basis for power, cost, and power-cost localized routing algorithms where nodes make routing decisions solely on the basis of location of their neighbors and destination. The power-aware routing algorithm attempts to minimize the total power needed to route a message between a source and a destination. The cost-aware routing algorithm is aimed at extending the battery's worst-case lifetime at each node. The combined power-cost localized routing algorithm attempts to minimize the total power needed and to avoid nodes with a short battery's remaining lifetime. We prove that the proposed localized (where each node makes routing decisions based solely on the location of itself, its neighbors, and destination) power, cost, and power-cost efficient routing algorithms are loop-free and show their efficiency by experiments MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 49 U4 - Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1045-9219 UR - ISI:000172229100002 L2 - routing;wireless networks;distributed algorithms;power management;PACKET SO - Ieee Transactions on Parallel and Distributed Systems 2001 ;12(11):1122-1133 4373 UI - 12663 AU - Stojmenovic I AU - Lin X AD - Univ Nacl Autonoma Mexico, DISCA, IIMAS, Mexico City 04510, DF, MexicoUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaCognos Inc, Ottawa, ON K1G 4K9, CanadaStojmenovic, I, Univ Nacl Autonoma Mexico, DISCA, IIMAS, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Loop-free hybrid single-path/flooding routing algorithms with guaranteed delivery for wireless networks AB - In a localized routing algorithm, each node makes forwarding decisions solely based on the position of itself, its neighbors, and its destination. In distance, progress, and direction-based approaches (reported in the literature), when node A wants to send or forward message m to destination node D, it forwards m to its neighbor C which is closest to D (has best progress toward D, whose direction is closest to the direction of D, respectively) among all neighbors of A. The same procedure is repeated until D, if possible, is eventually reached. The algorithms are referred to as GEDIR, MFR, and DIR when a common failure criterion is introduced: The algorithm stops if the best choice for the current node is the node from which the message came. We propose 2-hop GEDIR, DIR, and MFR methods in which node A selects the best candidate node C among its 1-hop and 2-hop neighbors according to the corresponding criterion and forwards m to its best 1-hop neighbor among joint neighbors of A and C. We then propose flooding GEDIR and MFR and hybrid single-path/flooding GEDIR and MFR methods which are the first localized algorithms (other than full flooding) to guarantee the message delivery (in a collision-free environment). We show that the directional routing methods are not loop-free, while the GEDIR and MFR-based methods are inherently loop free. The simulation experiments, with static random graphs, show that GEDIR and MFR have similar success rates, which is low for low degree graphs and high for high degree ones. When successful, their hop counts are near the performance of the shortest path algorithm. Hybrid single-path/flooding GEDIR and MFR methods have low communication overheads. The results are also confirmed by experiments with moving nodes and MAC layer MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 34 U4 - Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1045-9219 UR - ISI:000171588200002 L2 - routing;wireless networks;distributed algorithms;shortest path;broadcasting;PACKET SO - Ieee Transactions on Parallel and Distributed Systems 2001 ;12(10):1023-1032 4374 UI - 13041 AU - Stolarski J AU - Zibrowius H AU - Loser H AD - Polish Acad Sci, Inst Paleobiol, PL-00818 Warsaw, PolandCtr Oceanol Marseille, F-13007 Marseille, FranceUNAM, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoStolarski, J, Polish Acad Sci, Inst Paleobiol, Ul Twarda 51-55, PL-00818 Warsaw, Poland TI - Antiquity of the scleractinian-sipunculan symbiosis AB - Extant corals symbiotic with sipunculans, i.e., the caryophylliid Heterocyathus and the dendrophylliid Heteropsammia, develop corallum. modifications (in comparison with 'ordinary' representatives of these families) that seem to meet the needs of the coral's worm partner. We distinguish two types of corallum. modifications, designated the monoporous and the polyporous types. In the adult monoporous type, the shell inhabited by the sipunculan is usually overgrown only in part by the coral base. There are two orifices: the main one and a smaller pore in the upper part of the corallum. In the polyporous type the shell inhabited by the sipunculan is entirely overgrown and the coral produces a spiralled sipunculan housing. In addition to the main orifice there are several pores in the lower part of the corallum. Heterocyathus priscus sp. n. from the Early Cretaceous (Albian) of France is the oldest example of symbiosis, in which the monoporous-type corallum was modified in the same way as in extant monoporous Heterocyathus. We speculate that the monoporous type was ancestral, as only this type is known to occur among Cretaceous corals. Morphological similiarities between Heteropsammia and certain species of Heterocyathus, such as the Pourtales plan of septal arrangement and skeleton porosity, may point to a close phylogenetic relationship MH - France MH - Mexico|Sonora MH - Poland PB - WARSAW: INSTYTUT PALEOBIOLOGII PAN RP - NOT IN FILE U3 - TC 0 U4 - Paleontology U5 - J;Article AV - English IS - 0567-7920 UR - ISI:000170623300001 L2 - Scleractinia;Sipuncula;Caryophylliina;symbiosis;CORALS SO - Acta Palaeontologica Polonica 2001 ;46(3):309-330 4375 UI - 13745 AU - Stolik S AU - Ramon-Gallegos E AU - Pacheco M AU - Tomas SA AU - Cruz-Orea A AU - Perez-Zapata AJ AU - Gaebler R AU - Sanchez-Sinencio F AD - IPN, CICATA, Mexico City 11500, DF, MexicoIPN, ENCB, Dept Morfol, Lab Citopatol Ambiental, Mexico City 11240, DF, MexicoCtr Desarrollo Equipos & Instrumentos Cient CITMA, La Habana, CubaIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoStolik, S, IPN, CICATA, Legaria 694,Col Irrigac, Mexico City 11500, DF, Mexico TI - Photoacoustic measurement of ethylene as a real time biomarker of lipid peroxidation processes in mice AB - In some diseases the accumulated endogenous delta -aminolevulinic acid (delta -ALA), with a pH between 7 and 8, undergoes an enolization process that produces free radicals. It is expected that most of the exogenously-supplied GALA in healthy organisms will be converted into protoporphyrin IX (PpIX), and ultimately to the hem group, but a small accumulation of delta -ALA, when present, will initiate a lipid peroxidation process due to the generation of oxygen-reactive species. Some of the end products commonly found in lipid peroxidation include ethane, pentane, and ethylene as well as other hydrocarbons. As these gases are normally produced at trace levels, sensitive techniques are needed for their measurement. In this work, the peroxidative effect of exogenously-supplied GALA and CCl4 in female CD1 mice has been studied by photoacoustic trace gas detection. Exhaled ethylene from delta -ALA-administered mice reached concentrations of few ppbV for approximately 30 minutes, after application of delta -ALA MH - Cuba MH - Mexico|Distrito Federal PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000168481200104 L2 - ETHANE SO - Analytical Sciences 2001 ;17():S365-S367 4376 UI - 13736 AU - Stoll C AU - Rosano A AU - Botto LD AU - Erickson D AU - Khoury MJ AU - Olney RS AU - Castilla EE AU - Cocchi G AU - Cornel MC AU - Goujard J AU - Bermejo E AU - Merlob P AU - Mutchinick O AU - Ritvanen A AU - Zampino G AU - Mastroiacovo P AD - Hop Hautepierre, Serv Genet Med, F-67085 Strasbourg, FranceInt Ctr Birth Defects, I-00195 Rome, ItalyCtr Dis Control & Prevent, Div Birth Defects & Pediat Genet, Atlanta, GA 30341, USAFIOCRUZ, ECLAMC, BR-20010970 Rio De Janeiro, BrazilUniv Bologna, Ist Clin Pediat Prevent & Neonatol, I-40138 Bologna, ItalyUniv Groningen, Dept Med Genet, NL-9713 Groningen, NetherlandsINSERM, U149, France Paris Birth Defects Monitoring Program, F-75014 Paris, FranceUniv Complutense Madrid, Fac Med, ECEMC, E-28040 Madrid, SpainRabin Med Ctr, Dept Neonatol, IL-49100 Petah Tiqva, IsraelNatl Res & Dev Ctr Welf & Hlth Stakes, Registry Congenital Malformat, Helsinki 00531, FinlandIPIMC, I-00168 Rome, ItalyUniv Cattolica Sacro Cuore, Inst Pediat, Birth Defects Unit, I-00168 Rome, ItalyInst Nacl Nutr Salvador Zubiran, Dept Genet, Mexico City 14000, DF, MexicoStoll, C, Hop Hautepierre, Serv Genet Med, F-67085 Strasbourg, France TI - On the symmetry of limb deficiencies among children with multiple congenital anomalies AB - In humans, unpaired organs are placed in a highly ordered pattern along the left-right axis. As indicated by animal studies, a cascade of signaling molecules establish left-right asymmetry in the developing embryo. Some of the same genes are involved also in limb patterning. To provide a better insight into the connection between these processes in humans, we analysed the symmetry of limb deficiencies among infants with multiple congenital anomalies. The study was based on data collected by the International Clearinghouse for Birth Defects Monitoring Systems (ICBDMS). Registries of the ICBDMS provided information on infants who, in addition to a limb deficiency, also had at least one major congenital anomaly in other organ systems. We reviewed 815 such cases of which 149 cases (18.3 %) were syndromic and 666 (81.7 %) were nonsyndromic. The comparisons were made within the associated limb deficiencies, considering the information on symmetry, using a comparison group with malformations associated not involved in the index association. Among the non-syndromic cases, the left-right distribution of limb deficiencies did not differ appreciably between limb deficiency subtypes (e.g., preaxial, transverse, longitudinal). The left-right distribution of limb anomalies did not differ among most types of non-limb anomalies, though a predominance of left-sided limb deficiencies was observed in the presence of severe genital defects - odds ratio [OR], 2.6; 95 % CI, 1.1-6.4). Limb deficiencies (LDs) were more often unilateral than bilateral when accompanied by gastroschisis (OR, 0.1) or axial skeletal defects (OR, 0.5). On the contrary, LDs were more often bilateral than unilateral when associated with cleft lip with or without cleft palate (OR, 3.9) or micrognathia (OR, 2.6). Specifically, we found an association between bilateral preaxial deficiencies and cleft lip, bilateral amelia with gastroschisis and urinary tract anomalies, and bilateral transverse deficiencies and gastroschisis and axial skeleton defects. Of 149 syndromic cases, 62 (41.6 %) were diagnosed as trisomy 18. Out of the 30 cases of trisomy 18 with known laterality, 20 cases were bilateral. In the remainder the right and left sides were equally affected. Also, in most cases (74.4 %) only the upper limbs were involved. In conclusion the left-right distribution of limb deficiencies among some non-limb anomalies may suggest a relationship between the development of the limb and the left-right axis of the embryo. (C) 2001 Editions scientifiques et medicales Elsevier SAS MH - Brazil MH - Finland MH - France MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Spain MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0003-3995 UR - ISI:000168628600005 L2 - asymmetry;congenital anomalies;laterality;limb reduction deficiencies;limb deficiencies;congenital malformations of limbs;multiply malformed;situs inversus;symmetry;HOLT-ORAM SYNDROME; SITUS ABNORMALITIES; MALFORMATIONS; LATERALITY; ASYMMETRY; GENE; DEFECTS; POPULATION; MUTATIONS; SPECTRUM SO - Annales de Genetique 2001 ;44(1):19-24 4377 UI - 13694 AU - Stolte WC AU - Hansen DL AU - Piancastelli MN AU - Lopez ID AU - Rizvi A AU - Hemmers O AU - Wang H AU - Schlachter AS AU - Lubell MS AU - Lindle DW AD - Univ Nevada, Dept Chem, Las Vegas, NV 89154, USALawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USACALTECH, Jet Prop Lab, Div Earth & Space Sci, Pasadena, CA 91109, USAUniv Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, ItalyCtr Nacl Metrol, Queretaro 76900, MexicoUniv Lund, Max Lab, S-22100 Lund, SwedenCUNY City Coll, Dept Phys, New York, NY 10031, USAStolte, WC, Univ Nevada, Dept Chem, Las Vegas, NV 89154, USA TI - Anionic photofragmentation of CO: A selective probe of core-level resonances AB - Anion-yield spectroscopy using x rays is shown to be a selective probe of molecular core-level processes, providing unique experimental verification of shape resonances. For CO, partial anion and cation yields are presented for photon energies near the C K edge. The O- yield exhibits features above threshold related only to doubly excited states, in contrast to cation yields which also exhibit pronounced structure due to the well-known sigma* shape resonance. Because the shape resonance is completely suppressed for O-, anion spectroscopy thus constitutes a highly selective probe, yielding information unobtainable with absorption or electron spectroscopy MH - Italy MH - Mexico|Queretaro MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168623500020 L2 - OXYGEN K-EDGE; POST-COLLISION INTERACTION; ION-YIELD SPECTROSCOPY; SHAPE RESONANCE; POSTCOLLISION-INTERACTION; C(1S) EXCITATION; AUGER PROCESSES; MOLECULES; PHOTOIONIZATION; SHELL SO - Physical Review Letters 2001 ;86(20):4504-4507 4378 UI - 13200 AU - Stolterfoht N AU - Bremer JH AU - Hoffmann V AU - Rosler M AU - Baragiola R AU - De Gortari I AD - Hahn Meitner Inst Berlin GmbH, Bereich Strukturforsch, D-14109 Berlin, GermanyUniv Virginia, Lab Atom & Surface Phys, Charlottesville, VA 22901, USALab Cuernavaca, Inst Fis, Cuernavaca 62191, Morelos, MexicoStolterfoht, N, Hahn Meitner Inst Berlin GmbH, Bereich Strukturforsch, Glienickerstr 100, D-14109 Berlin, Germany TI - Mechanisms for plasmon production by hollow atoms above and below an Al surface AB - Low-energy electrons ejected by 1-4 keV Ne4+ ion impact on an Al surface were measured to study spectral structures near 11 eV attributed to the decay of plasmons. Absolute electron yields from the plasmon decay were primarily studied as a function of the incidence angle of the Ne4+ projectile. Model calculations were performed to separate contributions from ions penetrating into the solid and ions reflected at the surface. Opposite energy dependencies were obtained for the two contributions suggesting that they are governed by potential and kinetic energy effects, respectively. (C) 2001 Published by Elsevier Science B.V MH - Germany MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000170248800015 L2 - ELECTRON-EMISSION; SLOW IONS; METAL-SURFACES; EXCITATION; NEUTRALIZATION; ALUMINUM; MG; NE SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2001 ;182():89-95 4379 UI - 13914 AU - Storkel U AU - Aggour M AU - Murrell CP AU - Lewerenz HJ AD - Hahn Meitner Inst Kernforsch Berlin GmbH, Div Solar Energy, D-14109 Berlin, GermanyUniv Ibn Tofail, Fac Sci, Mexico City 14000, DF, MexicoStorkel, U, Inst Microtechnol, Mainz, Germany TI - Electrochemical treatment of CuInS2 AB - We present a novel method to remove the unwanted covellite (CuS) in Cu-rich prepared CuInS2-CdS-ZnO photovoltaic cells by a combined chemical/electrochemical procedure. Our treatment results in a solid state transformation by electrochemical reduction in an alkaline electrolyte with subsequent chemical dissolution. The reduction is carried out in the potential range between - 1.1 and - 0.85 V vs. a saturated calomel electrode (SCE). In situ atomic force microscopy (AFM) confirms a distinct change in morphology. The chemical and electrochemical reactions leading to the dissolution are discussed. After completion of the treatment a pronounced photoeffect is observed. X-Ray diffraction (XRD) shows the complete removal of CuS, (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000168013900050 L2 - thin-film solar cells;chalcopyrites;CuInS2;electrochemistry;covellite;etching SO - Thin Solid Films 2001 ;387(1-2):182-184 4380 UI - 12383 AU - Stout B AU - Auger JC AU - Lafait J AD - Ctr St Jerome, Fac Sci & Tech, Inst Fresnel, CNRS,UMR 6133, F-13397 Marseille 20, FranceCOMEX, Ctr Invest Polimeros, Tepexpan 55885, MexicoUniv Paris 06, Lab Opt Solides, UMR 7601, F-75252 Paris 05, FranceStout, B, Ctr St Jerome, Fac Sci & Tech, Inst Fresnel, CNRS,UMR 6133, F-13397 Marseille 20, France TI - Individual and aggregate scattering matrices and cross-sections: conservation laws and reciprocity AB - For systems of multiple spheres, we investigate in detail the 'individual' and aggregate electromagnetic scattering matrices, and their relations with conservation laces, reciprocity and the optical theorem. In order for these relations to adopt their simplest form, care is taken to completely extract both incoming and outgoing phase factors in the definitions. We illustrate that the 'individual' cross-sections in an aggregate are defined only in terms of part of the total field, and consequently do not individually obey conservation laws or reciprocity; these relations should be satisfied for the scattering by the entire aggregate. We demonstrate that for scatterer centred transfer matrices, the conservation laws and reciprocity are automatically satisfied regardless of whether or not sufficient multipolarities were retained in the description of individual scatterers. Derivations and results are worked out in a particularly compact and transparent formalism, including magnetic permeability contrast, and the possibility of complex polarizations MH - France MH - Mexico|Estado De Mexico PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 15 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000172097000006 L2 - PHOTONIC CRYSTALS; T-MATRIX; MULTIPLE; SPHERES SO - Journal of Modern Optics 2001 ;48(14):2105-2128 4381 UI - 14524 AU - Straub SM AU - Martin-Del Pozzo AL AD - GEOMAR Res Ctr, Dept Volcanol & Petrol, D-24148 Kiel, GermanyUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoStraub, SM, GEOMAR Res Ctr, Dept Volcanol & Petrol, Wischhofstr 1-3, D-24148 Kiel, Germany TI - The significance of phenocryst diversity in tephra from recent eruptions at Popocatepetl volcano (central Mexico) AB - Tephra lapilli from six explosive eruptions between April 1996 and February 1998 at Popocatepetl volcano (= Pope) in central Mexico have been studied to investigate the causes of magma diversification in thick-crusted volcanic arcs. The tephra particles are sparsely porphyritic (approximate to5 vol%) magnesian andesites (SiO2 = 58-65 wt%; MgO = 2.6-5.9 wt%) that contain phenocrysts of NiO-rich (up to 0.67 wt% NiO) magnesian olivine (Fo(89-91), cores) with inclusions of Cr-spinel (cr# = 59-70), orthopyroxene (mg# = 63-76), clinopyroxene (mg# = 68-86), intermediate to sodic plagioclase (An(33-66)), and traces of amphibole. Major and trace element systematics indicate magma mixing. The liquid mg#(melt) ratios inferred from the ferromagnesian phenocrysts suggest the existence of a mafic (mg#(melt) approximate to 72-76) and an evolved component magma (mg#(melt) approximate to 35-40). These component magmas form a hybrid magnesian andesite with an intermediate range of mg#(melt) = 50-72. The mafic end member (mg#(melt) approximate to 72-75) is saturated with olivine and spinel and crystallizes at temperatures approximate to 1170-1085 degreesC with oxygen fugacities close to the fayalite-magnetite-quartz buffer and elevated water contents of several wt% H2O. A likely location of crystallization is at lower crustal levels, possibly at the Moho. Olivine is followed by high-mg# clinopyroxene which could start to crystallize during magma ascent. At depths of approximate to4 to 13 km, the mafic magma mixes with an evolved composition containing low-mg# clino- and orthopyroxene and plagioclase at a temperature of approximate to 950 degreesC. The repetitive ascent of batches of mafic magmas spaced days to weeks apart implies multiple episodes of crystallization and magmna mixing. The tephra is similar to the Pope magnesian andesites, suggesting similar generic processes for the common lavas of the volcano. The advantage of the tephra is that it can be used to reconstruct the composition of the mafic magma. Building on the elemental systematics of the tephra and a comparison to the near-primary basalts from the surrounding monogenetic fields, we infer that the Pope mafic end member is a magnesian andesite with variable, but high SiO2 contents of approximate to 55-62 wt% and near-primary characteristics, such as high-mg#(melt) of 72-75, FeO*/MgO ratios < 1 (if extrapolated to an mg#(melt) of 72-75), and high Ni contents (= 200 ppm Ni). This model implies that the typical elemental signature of the Popo andesites, such as the low CaO, Al2O3, FeO*, high Na2O contents, and the depletion in high-field strength elements (e.g., P, Zr, Ti), are mantle source phenomena. Thus, determining the elemental budget of the magnesian andesite, as it is prior to the modifications by crustal differentiation, is central to quantifying the subcrustal mass fluxes beneath Popo MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0010-7999 UR - ISI:000166407400007 L2 - MEDICINE LAKE VOLCANO; WESTERN MEXICO; PERIDOTITE XENOLITHS; IZTACCIHUATL VOLCANO; BASALTIC ANDESITE; YOUNGER ANDESITES; SUBDUCTION ZONES; SILICATE LIQUIDS; EASTERN PACIFIC; OXYGEN FUGACITY SO - Contributions to Mineralogy and Petrology 2001 ;140(4):487-510 4382 UI - 13031 AU - Strygin VV AU - Fridman LM AU - Polyakov AE AD - Voronezh State Univ, Fac Appl Math & Mech, Voronezh 394693, RussiaChihuahua Inst Technol, Div Postgrad Study & Invest, Chihuahua 31310, MexicoStrygin, VV, Voronezh State Univ, Fac Appl Math & Mech, Univ Skaya Pl 1, Voronezh 394693, Russia TI - Local stabilization of relay control systems with delay MH - Mexico|Chihuahua MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1064-5624 UR - ISI:000170629100030 SO - Doklady Mathematics 2001 ;64(1):106-108 4383 UI - 13786 AU - Suarez-Morales E AU - Dias C AD - El Col Frontera Sur, ECOSUR, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoUniv Fed Rio de Janeiro, Inst Biol, BR-21941590 Rio De Janeiro, BrazilSuarez-Morales, E, El Col Frontera Sur, ECOSUR, Unidad Chetumal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - A new species of Monstrilla (Crustacea : Copepoda : Monstrilloida) from Brazil with notes on M-brevicornis Isaac AB - Monstrilla pustulata n.sp., is described from three adult females collected in the Guanabara Bay system on the coast of Brazil. The new species is similar to M. brevicornis Isaac in having a peculiar, conical, horn-like protuberance on the ventral surface near the antennular bases. The new species is compared with the holotype of M. brevicornis, from the Java Sea. Monstrilla pustulata san be distinguished by its body proportions and details of the antennular armature and swimming legs. However, the most striking feature of this species is its cuticular ornamentation, with a dorsal patch of small, blister-like processes on the head surface and other patches on the cephalothorax and on some pedigerous somites. The original description of Monstrilla brevicornis is complemented with new morphological data and is compared with M. turgida Scott, also from the Indonesia region. This is the first monstrilloid species described as new from the southwestern Atlantic Ocean MH - Brazil MH - Mexico|Quintana Roo PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 3 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000168465000019 SO - Proceedings of the Biological Society of Washington 2001 ;114(1):219-228 4384 UI - 11709 AU - Suarez-Romero JG AU - Tepichin-Rodriguez E AU - Mielenz KD AD - CENAM, Ctr Nacl Metrol, Queretaro, MexicoInst Nacl Astrofis Opt & Elect, Puebla, MexicoNatl Inst Stand & Technol, Gaithersburg, MD 20899, USASuarez-Romero, JG, CENAM, Ctr Nacl Metrol, Km 4-5 Carretera Cues, Queretaro, Mexico TI - Cross-spectral density propagated through a circular aperture AB - A method is presented for evaluating the cross-spectral density diffracted by a circular aperture in the Fresnel approximation. Our proposal is a generalization to partially coherent illumination of the classical solution to the problem of near-field diffraction due to a circular aperture. We show that our generalization covers particular cases already reported in the literature and present numerical and experimental results that verify our proposal. This work is a contribution to the treatment of diffraction by multiple apertures MH - Mexico|Puebla MH - Mexico|Queretaro MH - USA PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 3 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000174022600002 L2 - DIFFRACTION SO - Metrologia 2001 ;38(5):379-384 4385 UI - 13401 AU - Suft G AU - Beulertz W AU - Bock A AU - Frank M AU - Glombik A AU - Hey J AU - Kowalzik B AU - Kretschmer W AU - Merz S AU - Meyer H AU - Sozuer L AU - Weidmann R AU - Boschitz E AU - Brinkmoller B AU - Meier R AU - Mertens G AU - van den Brandt B AU - Hautle P AU - Konter JA AU - Mango S AU - Mathelitsch L AU - Garcilazo H AU - Tacik R AU - Amaudruz P AU - Gruebler W AD - Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-76131 Karlsruhe, GermanyUniv Tubingen, Inst Phys, D-72076 Tubingen, GermanyPaul Scherrer Inst, CH-5232 Villigen, SwitzerlandGraz Univ, Inst Theoret Phys, A-8010 Graz, AustriaInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Regina, Regina, SK S4S 0A2, CanadaTRIUMF, Vancouver, BC V6T 2A3, CanadaETH Honggerberg, ETH Zurich, CH-8093 Zurich, SwitzerlandSuft, G, Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany TI - Measurement of polarization transfer in pion-deuteron elastic scattering AB - We have measured polarization transfer observables in pid elastic scattering at two energies below and at the Delta (3, 3) resonance at backward angles. The results are compared to relativistic Faddeev calculations and SAID solutions MH - Austria MH - Canada MH - Germany MH - Mexico|Distrito Federal MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000169396200055 L2 - OBSERVABLES SO - Nuclear Physics A 2001 ;689(1-2):406C-409C 4386 UI - 12150 AU - Sulentic JW AU - Rosado M AU - Dultzin-Hacyan D AU - Verdes-Montenegro L AU - Trinchieri G AU - Xu C AU - Pietsch W AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Astrofis Andalucia, E-18080 Granada, SpainOsserv Astron Brera, I-20121 Milan, ItalyCALTECH, IPAC, Pasadena, CA 91125, USAMax Planck Inst Extraterr Phys, D-85741 Garching, GermanySulentic, JW, Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA TI - A multiwavelength study of Stephanis Quintet AB - Stephan's Quintet (SQ) is a compact group that we find in an atypical moment when a high-velocity intruder is passing through it. The intrusion is particularly interesting because a previous intruder had stripped most of the gas from the group members. This debris field was shocked in the ongoing collision with the new intruder. This evolutionary history agrees well with observations and explains how a strongly interacting system can show low levels of star formation. We present new multiwavelength data including previously unpublished ROSAT X-ray, Ha interference ISO MIR/FIR, and filter/Fabry-Perot, radio line and continuum images. These observations and previously published data provide new insights, as well as support for some previous hypotheses. (1) and H I velocities allow us to Fabry-Peerot unambiguously distinguish between gas associated with SQ and the new intruder. (2) Most detected emission regions are found in the remnant interstellar medium (ISM) of the new intruder, which allows us to infer its size and present physical state. (3) The few emission regions associated with the stripped ISM of SQ include the best candidate tidal dwarf galaxy. (4) Multiwavelength data suggest that strong MIR/FIR emission from the Seyfert 2 nucleus of NGC 7319 comes from dust heated directly by a power-law continuum rather than a starburst. (5) The correspondence between extended X-ray/radio continuum/forbidden optical emission confirms the existence of a large scale shock in SQ. (6) We confirm the presence of two stripped spiral members in the process of transformation into E/S0 morphology. Finally (7) observations are consistent with the idea that the collision in SQ is ongoing with possible detection of H II region ablation and Rayleigh-Taylor instabilities MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000172932200015 L2 - galaxies : interactions;galaxies : kinematics and dynamics;galaxies : structure;galaxies : Seyfert;intergalactic medium;HICKSON COMPACT-GROUPS; SEYFERT-GALAXY NGC-7319; FAR-INFRARED PROPERTIES; CARTWHEEL RING GALAXY; STAR-FORMATION RATES; X-RAY-EMISSION; DWARF GALAXIES; TIDAL TAILS; ENVIRONMENT; EVOLUTION SO - Astronomical Journal 2001 ;122(6):2993-3016 4387 UI - 14328 AU - Sun J AU - Pastor N AU - Weinstein H AD - Mt Sinai Sch Med, New York, NY 10029, USAUAEM, Cuernavaca, Morelos, Mexico TI - MD simulation of TATA-box DNA: PME calculations and the effect of electrostatic cut-off MH - Mexico|Morelos MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000166692201494 SO - Biophysical Journal 2001 ;80(1):325A-326A 4388 UI - 11629 AU - Sun XC AU - Dong XL AU - Toledo JA AD - Inst Mexicano Petr, Prog Mol Simulat, Mexico City 07730, DF, MexicoShenyang Polytech Univ, Shenyang, Peoples R ChinaSun, XC, Inst Mexicano Petr, Prog Mol Simulat, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Superparamagnetic properties of carbon-encapsulated Ni nanoparticle assemblies AB - Carbon-encapsulated Ni nanoparticles [Ni(C)] were synthesized using a modified arc-discharge reactor under methane atmosphere. The average particle size was revealed to be typically 10.5 nm with a spherical shape. The intimate and contiguous carbon fringe around these Ni nanoparticles is good evidence for complete encapsulation by carbon shell layers. Superparamagnetic property studies indicate that the blocking temperature (T-B) is around 115 K at 1000 Oe applied field. Below T-B, the temperature dependence of the coercivity is given by H-c = H-ci[1-(T/T-B)(1/2)], with H-ci approximate to 500 Oe. Above T-B, the magnetization M(H, T) can be described by the classical Langevin function L using the relationship M/M-s(T = 0) = coth(muH/kT)-kT/muH. The particle size can be inferred from the Langevin fit (particle moment mu) and the blocking temperature theory (T-B), with values slightly larger than the high-resolution transmission electron microscopy observations. It is suggested that these assemblies of carbon-encapsulated Ni nanoparticles have typical single-domain, field-dependent superparamagnetic relaxation properties MH - Mexico|Distrito Federal MH - Peoples R China PB - STEVENSON RANCH: AMER SCIENTIFIC PUBLISHERS RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1533-4880 UR - ISI:000174291500008 L2 - superparamagnetic properties;nickel nanoparticles;magnetization;SQUID;MAGNETIC-PROPERTIES; NANOCAPSULES; RELAXATION SO - Journal of Nanoscience and Nanotechnology 2001 ;1(3):291-294 4389 UI - 11842 AU - Sun XC AU - Toledo JA AU - Cui ZL AU - Zhang ZK AD - Inst Mexicano Petr, Prog Simulac Mol, Mexico City 07730, DF, MexicoQingdao Inst Chem Technol, Res Ctr Nanometer Mat, Qingdao 266042, Peoples R ChinaSun, XC, Inst Mexicano Petr, Prog Simulac Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Synthesis and structure of magnetic core-shell Ni-Ce nanocomposite particles AB - A new type of magnetic core-shell Ni-Ce nanocomposite particles (15-50 nm) is presented. SEM observations suggest the particles are strongly ferromagnetic, interacting with ordered chain-like features. Typical HR-TEM images demonstrate that many planar defects (nanotwins and stacking faults) exist in the surface shell and large Ni core zone (10-40 nm) of the particles; the inner shell layers (4-6 nm) consist of NiCe alloy and the outermost shell is NiO. Nano-diffraction patterns show an indication of well-defined spots characteristic of nanocomposite materials, of which certain crystal facet orientation relationships between orthorhombic [111] of NiCe and cubic [311] of Ni2Ce, face-center crystal [222] of NiO, cubic [111] of nickel have been identified. This confirms the nature of this core-shell nanocomposite particle MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1388-0764 UR - ISI:000173729600010 L2 - magnetic;nanocomposite;core-shell;Ni-Ce;transmission electron microscopy;twin faults;SOL-GEL ROUTE; HYDROGEN STORAGE; NICKEL; NANOPARTICLES SO - Journal of Nanoparticle Research 2001 ;3(4):325-328 4390 UI - 14143 AU - Suri RE AU - Bargas J AU - Arbib MA AD - Univ So Calif, Brain Project, Los Angeles, CA 90089, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biofis, Mexico City 04510, DF, MexicoSuri, RE, Salk Inst, Computat Neurobiol Lab, POB 85800, San Diego, CA 92186 USA TI - Modeling functions of striatal dopamine modulation in learning and planning AB - The activity of midbrain dopamine neurons is strikingly similar to the reward prediction error of temporal difference reinforcement learning models. Experimental evidence and simulation studies suggest that dopamine neuron activity serves as an effective reinforcement signal for learning of sensorimotor associations in striatal matrisomes. In the current study, we simulate dopamine neuron activity with the extended temporal difference model of Pavlovian learning and examine the influences of this signal on medium spiny neurons in striatal matrisomes. The modeled influences include transient membrane effects of dopamine D-1 receptor activation, dopamine-dependent long-term adaptations of corticostriatal transmission. and effects of dopamine on rhythmic fluctuations of the membrane potential between an elevated "up-state" and a hyperpolarized "down-state". The most dominant activity in the striatal matrisomes is assumed to elicit behaviors via projections from the basal ganglia to the thalamus and the cortex. This "standard model" performs successfully when tested for sensorimotor learning and goal-directed behavior (planning). To investigate the contributions of our model assumptions to learning and planning, rue test the performance of several model variants that lack one of these mechanisms, These simulations show that the adaptation of the dopamine-like signal is necessary for sensorimotor learning and planning. Sensorimotor learning requires dopamine-dependent long-term adaptation of corticostriatal transmission. Lack of dopamine-like novelty responses decreases the number of exploratory acts, which impairs planning capabilities. The model loses its planning capabilities if the dopamine-like signal is simulated with the original temporal difference model, because the original temporal difference model does not form novel associative chains. Transient membrane effects of the dopamine-like signal on striatal firing substantially shorten the reaction time in the planning task. The capability for planning is improved by influences of dopamine on the durations of membrane potential fluctuations and by manipulations that prolong the reaction time of the model. These results suggest that responses of dopamine neurons to conditioned stimuli contribute to sensorimotor reward learning, novelty responses of dopamine neurons stimulate exploration, and transient dopamine membrane effects are important for planning, (C) 2001 IBRO. Published by Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 28 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000167494600007 L2 - reinforcement learning;temporal difference learning;internal model;striatum;novelty;NEURAL-NETWORK MODEL; MEMBRANE-POTENTIAL FLUCTUATIONS; NEOSTRIATAL NEURONS; BASAL GANGLIA; SPINY NEURONS; PARKINSONS-DISEASE; IN-VIVO; REINFORCEMENT SIGNAL; RAT NEOSTRIATUM; FIRING PATTERNS SO - Neuroscience 2001 ;103(1):65-85 4391 UI - 13932 AU - Suzan G AU - Ceballos G AU - Mills J AU - Ksiazek TG AU - Yates T AD - Univ New Mexico, Dept Biol, Museum SW Biol, Albuquerque, NM 87131, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoCtr Dis Control & Prevent, Div Viral & Rickettsial Dis, Atlanta, GA, USASuzan, G, Univ New Mexico, Dept Biol, Museum SW Biol, Albuquerque, NM 87131 USA TI - Serologic evidence of hantavirus infection in sigmodontine rodents in Mexico AB - Antibodies to hantaviruses in two species of sigmodontine rodents (Peromyscus maniculatus and Reithrodontomys symichrasti) collected in central Mexico are reported. Per omyscus maniculatus, a common species throughout much of Mexico, is the reservoir of Sin Nombre virus (SNV), the etiologic agent of the great majority of cases of hantavirus pulmonary syndrome (HPS) in North America. Although the identity of the virus detected in P: maniculatus in Mexico could not be determined by these serologic results, our findings suggest that SNV may occur throughout the range of P. maniculatus in North America. If true, the failure to identify HPS in Mexico is not due to the absence of pathogenic hantaviruses in Mexico MH - USA MH - Mexico|Distrito Federal PB - LAWRENCE: WILDLIFE DISEASE ASSN, INC RP - NOT IN FILE U3 - TC 4 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0090-3558 UR - ISI:000168077600026 L2 - antibodies;deer mouse;hantavirus;rodents;Peromyscus maniculatus;Sigmodontinae;Sin Nombre Virus SO - Journal of Wildlife Diseases 2001 ;37(2):391-393 4392 UI - 12166 AU - Szilner S AU - Nicoli MP AU - Basrak Z AU - Freeman RM AU - Haas F AU - Morsad A AU - Brandan ME AU - Satchler GR AD - Rudjer Boskovic Inst, HR-10002 Zagreb, CroatiaInst Rech Subatom, CNRS, IN2P3, Strasbourg 2, FranceUniv Strasbourg 1, F-67037 Strasbourg, FranceUniv Hassan II, Fac Sci Ben MSik, Casablanca, MoroccoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAOak Ridge Natl Lab, Oak Ridge, TN 37831, USASzilner, S, Rudjer Boskovic Inst, HR-10002 Zagreb, Croatia TI - Refractive elastic scattering of carbon and oxygen nuclei: The mean field analysis and Airy structures AB - The experimental data on the O-16 + C-12 and O-18 + C-12 elastic scatterings and their optical model analysis are presented. Detailed and complete elastic angular distributions have been measured at the Strasbourg Vivitron accelerator at several energies covering the energy range between 5 and 10 MeV per nucleon, The clastic scattering angular distributions show the usual diffraction pattern and also. at larger angles, refractive effects in the form of nuclear rainbow and associated Airy structures. The optical model analysis unambiguously the evolution of the refractive scattering pattern. The observed structure, namely the Airy minima, can be consistently described by a nucleus-nucleus potential with a deep real part and a weakly absorptive imaginary part. The difference in absorption in the two systems is explained by an increased imaginary (mostly surface) part of the potential in the O-18 + C-12 system. The relation between the obtained potentials and those reported for the symmetrical O-16 + O-16 and C-12 + C-12 systems is drawn MH - Croatia MH - France MH - Mexico|Distrito Federal MH - Morocco MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000172733000043 L2 - O-16+C-12 SCATTERING; RESONANT BEHAVIOR; INCIDENT ENERGIES; O-16+O-16; POTENTIALS; C-12+C-12 SO - Physical Review C 2001 ;64(6): 4393 UI - 13530 AU - Tagle JG AU - Chryssomallis MT AU - Christodoulou CG AD - Democritus Univ Thrace, Dept Elect & Comp Engn, GR-67100 Xanthi, GreeceUniv New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131, USABS Inst Tecnol & Estud Super, Monterrey, MexicoChryssomallis, MT, Democritus Univ Thrace, Dept Elect & Comp Engn, GR-67100 Xanthi, Greece TI - FDTD analysis of finite-sized linear phased arrays of stacked microstrip antennas AB - Contents The three-dimensional finite difference time domain (FDTD) algorithm is used to analyze finite-sized phased array antennas. Coaxially-fed, capacitively coupled stacked microstrip antennas are analyzed. A phase shift in the time domain is implemented to model the effects of scanning angle. A rigorous feed model, suitable for FDTD analysis with the perfectly matched layer (PML) is used. The S-parameters, from which input impedance and mutual coupling are evaluated, as well as other important indices are calculated and compared with measured results MH - Greece MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0948-7921 UR - ISI:000169202700005 SO - Electrical Engineering 2001 ;83(3):123-128 4394 UI - 13878 AU - Taheri B AU - Munoz AF AU - Palffy-Muhoray P AU - Twieg R AD - Kent State Univ, Inst Liquid Crystal, Kent, OH 44242, USAUniv Metropolitana, Dept Phys, Mexico City, DF, MexicoKent State Univ, Dept Chem, Kent, OH 44242, USATaheri, B, Kent State Univ, Inst Liquid Crystal, Kent, OH 44242, USA TI - Low threshold lasing in cholesteric liquid crystals AB - Cholesteric liquid crystals, due to their periodic structure and large birefringence, are 1-d photonic band-gap materials. Circularly polarized light of the same handedness as the cholesteric structure cannot propagate in the reflection band. We have studied the effects of this band-gap structure on the fluorescence spectrum of dyes dissolved in the cholesteric liquid crystal, as well as on the fluorescence spectrum of the liquid crystal itself. We have found that emission is enhanced at the band edges, and, above a certain pump threshold, lasing occurs both in dye-doped and in pure liquid crystals. Extremely low lasing thresholds and high efficiencies were observed in dye-doped systems. The results suggest an active energy transfer mechanism between the LC host and the fluorescent dye molecules MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 48 U4 - Crystallography U5 - J;Article AV - English IS - 1058-725X UR - ISI:000168132300007 SO - Molecular Crystals and Liquid Crystals 2001 ;358():73-82 4395 UI - 13089 AU - Takeuchi N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoTakeuchi, N, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - First principles calculations of the adsorption of single group III and group V atoms on Si(001) AB - We have performed first principles total energy calculations to determine the adsorption site of single group III (Al, Ga, and In) or group V (As and Sb) adatoms on Si(0 0 1). Two different binding configurations are found for group III elements. In the first one, the adatom is in a three-fold position between two Si dimers, while in the second one, it is on top of a second layer Si atom (M site). For Al and In we found that the two binding positions have the same total energy. In the case of Ga, the M site is slightly more favorable by 0.17 eV/adatom. A single adsorption site is found for group V elements, and it is located almost on top of a Si dimer. In all cases, Si dimers not involved in the bonds are barely affected. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000170302100010 L2 - density functional calculations;low index single crystal surfaces;silicon;aluminum;gallium;indium;arsenic;surface relaxation and reconstruction;surface structure, morphology, roughness, and topography;SCANNING-TUNNELING-MICROSCOPY; ELECTRONIC-STRUCTURE; SI(100) SURFACE; MONOLAYER; SI(111); ADATOMS; GROWTH; GA; AL; GE SO - Surface Science 2001 ;482():44-48 4396 UI - 12648 AU - Talmadge JE AU - Singh R AU - Ino K AU - Ageitos A AU - Buyukberber S AD - Univ Nebraska, Med Ctr, Dept Pathol & Microbiol, Omaha, NE 68198, USANagoya Univ, Sch Med, Dept Obstet & Gynecol, Nagoya, Aichi, JapanFdn Jimenez Diaz, Dept Oncol, Mexico City, DF, MexicoTurgut Ozal Med Ctr, Dept Internal Med, Malatya, TurkeyTalmadge, JE, Univ Nebraska, Med Ctr, Dept Pathol & Microbiol, 987660 Nebraska Med Ctr, Omaha, NE 68198 USA TI - Potential for cytokine and product manipulation to improve the results of autologous stem cell transplantation for rheumatoid arthritis AB - The eradication of autoreactive T cells by high dose therapy and stein cell transplantation and the resultant alterations in the immunologic network, thymic reeducation, and peripheral tolerance provide treatment mechanisms for autoimmune and inflammatory diseases. One outcome of autologous stein cell transplantation is a significant decrease in the CD4:CD8 ratio due to a loss in CD4+ cells and a depression in T cell function. Mechanistically, the loss of T cell function is associated with an increased frequency of circulating monocytes, their expression of Fas ligand (FasL). and it high frequency of apoptotic CD4+ T cells. This suggests that activated Fas+ CD4+ lymphocytes interact with FasL+ monocytes, resulting in apoptosis, preferential deletion of CD4+ T cells, an inversion in the CD4:CD8 ratio, and depressed T cell function. These observations suggest the potential for immune regulation using stem cell manipulation or posttransplant cytokine administration its therapeutic strategies for autoimmune/inflammatory diseases MH - Japan MH - Mexico|Distrito Federal MH - USA MH - Turkey PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000171482400009 L2 - peripheral tolerance;rheumatoid arthritis;stem cell transplantation;BONE-MARROW TRANSPLANTATION; SYSTEMIC LUPUS-ERYTHEMATOSUS; CHRONIC MYELOGENOUS LEUKEMIA; AUTOIMMUNE-DISEASES; PROLONGED REMISSION; T-LYMPHOCYTES; APOPTOSIS; INTERLEUKIN-10; LYMPHOMA; LYMPHOPOIESIS SO - Journal of Rheumatology 2001 ;28():32-38 4397 UI - 13323 AU - Tamashiro MN AU - Hernandez-Zapata E AU - Schorr PA AU - Balastre M AU - Tirrell M AU - Pincus P AD - Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoTamashiro, MN, Univ Sao Paulo, Inst Fis, Caixa Postal 66318, BR-05315970 Sao Paulo, Brazil TI - Salt dependence of compression normal forces of quenched polyelectrolyte brushes AB - We obtained mean-field expressions for the compression normal forces between two identical opposing quenched polyelectrolyte brushes in the presence of monovalent salt. The brush elasticity is modeled using the entropy of ideal Gaussian chains, while the entropy of the microions and the electrostatic contribution to the grand potential is obtained by solving the nonlinear Poisson-Boltzmann equation for the system in contact with a salt reservoir. The interplay between these distinct contributions upon variations of the ionic strength determines the brush thickness. For the polyelectrolyte brush we considered both an isotropic charged slab as well as a longitudinally heterogeneous charge profile obtained using a self-consistent field theory. Using the Derjaguin approximation, we related the planar-geometry results to the realistic two-crossed cylinders experimental setup. Theoretical predictions are compared to experimental measurements of the salt dependence of the compression normal forces between two quenched polyelectrolyte brushes formed by the adsorption of diblock copolymers poly(tert-butyl styrene)-sodium poly(styrene sulfonate) onto an octadecyltriethoxysilane hydrophobically modified mica surface. (C) 2001 American Institute of Physics MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 21 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000169800000037 L2 - CONSISTENT-FIELD THEORY; COUNTERION-CONDENSATION; CHARGED RODS; FLEXIBLE POLYELECTROLYTES; ELECTROSTATIC ATTRACTION; RODLIKE POLYELECTROLYTES; HYDROPHOBIC BLOCK; ADSORPTION; COPOLYMERS; SURFACES SO - Journal of Chemical Physics 2001 ;115(4):1960-1969 4398 UI - 14007 AU - Tan K AU - Moreno-Hagelsieb G AU - Collado-Vides J AU - Stormo GD AD - Washington Univ, Sch Med, Dept Genet, St Louis, MO 63110, USAUNAM, Ctr Invest Fijac Nitrogeno, Programa Biol Mol Computac, Cuernavaca 62100, Morelos, MexicoStormo, GD, Washington Univ, Sch Med, Dept Genet, St Louis, MO 63110 USA TI - A comparative genomics approach to prediction of new members of regulons AB - Identifying the complete transcriptional regulatory network for an organism is a major challenge. For each regulatory protein, we want to know all the genes it regulates, that is, its regulon. Examples of known binding sites can be used to estimate the binding specificity of the protein and to predict other binding sites. However, binding site predictions can be unreliable because determining the true specificity of the protein is difficult because of the considerable variability of binding sites. Because regulatory systems tend to be conserved through evolution, we can use comparisons between species to increase the reliability of binding site predictions. In this article, an approach is presented to evaluate the computational predicitions of regulatory sites. We combine the prediction of transcription units having orthologous genes with the prediction of transcription factor binding sites based on probabilistic models. We augment the sets of genes in Escherichia coli that are expected to be regulated by two transcription factors, the cAMP receptor. protein and the fumarate and nitrate reduction regulatory protein, through a comparison with the Haemophilus influenzae genome. At the same time, we learned more about the regulatory networks of H. influenzae, a species with much less experimental knowledge than E. coll. By studying orthologous genes subject to regulation by the same transcription factor, we also gained understanding of the evolution of the entire regulatory systems MH - Mexico|Morelos MH - USA PB - PLAINVIEW: COLD SPRING HARBOR LAB PRESS RP - NOT IN FILE U3 - TC 47 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Letter AV - English IS - 1088-9051 UR - ISI:000167885400008 L2 - ESCHERICHIA-COLI K-12; GENE ACTIVATOR PROTEIN; TRANSCRIPTIONAL REGULATION; RECEPTOR PROTEIN; DNA; SEQUENCE; FNR; BINDING; CRP; PATTERNS SO - Genome Research 2001 ;11(4):566-584 4399 UI - 13602 AU - Tan ZY AU - Kan FL AU - Peng GX AU - Wang ET AU - Reinhold-Hurek B AU - Chen WX AD - China Agr Univ, Coll Biol Sci, Dept Microbiol, Beijing 100094, Peoples R ChinaMax Planck Inst Terr Microbiol, Grp Symbiosis Res, D-35043 Marburg, GermanyInst Politecn Nacl, Escuela Nacl Ciencias Biol, Lab Microbiol Agricola, Mexico City 02800, DF, MexicoChen, WX, China Agr Univ, Coll Biol Sci, Dept Microbiol, Beijing 100094, Peoples R China TI - Rhizobium yanglingense sp nov., isolated from arid and semi-arid regions in China AB - A novel rhizobial group, cluster 9, defined in previous research [Tan, Z. Y., Wang, E. T., Peng, G. X., Zhu, M. E., Martinez-Romero, E. & Chen, W. X. (1999). Int I Syst Bacteriol 49, 1457-1469], was further characterized by determination of DNA base composition, whole-cell protein SDS-PACE analysis, DNA-DNA hybridization, 16S rRNA gene sequencing and host specificity. These isolates were collected from the wild legumes Amphicarpaea trisperma, Coronilla varia and Gueldenstaedtia multiflora growing in arid and semi-arid regions in north-western China. Isolates within cluster 9 grouped into a single cluster above a similarity level of 90.6% in a cluster analysis based on protein SDS-PACE, and they were differentiated from defined rhizobial species. Comparative analysis of 16S rRNA gene sequences showed that isolate CCBAU 71623(T), representing cluster 9, was most related to Rhizobium gallicum and Rhizobium mongolense. The DNA-DNA homologies were lower than 42.4% among cluster 9 and defined species, including R. gallicum and R. mongolense. These data indicated that cluster 9 was a unique genomic species. Isolates within this cluster could share their host plants. They could not nodulate Galega orientalis and Leucaena leucocephala and formed ineffective nodules on Phaseolus vulgaris. This group could also be differentiated from defined species by phenotypic characteristics. It is therefore proposed as a new species, Rhizobium yanglingense, with isolate CCBAU 71623 as the type strain MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 19 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000168900000022 L2 - Rhizobium yanglingense;Amphicarpaea trisperma;Coronilla varia;Gueldenstaedtia multiflora;phylogeny;BACTERIA; DIVERSITY; LEGUMES; TIANSHANENSE; NODULATE; PROTEINS; TREES; SOILS; PCR SO - International Journal of Systematic and Evolutionary Microbiology 2001 ;51():909-914 4400 UI - 14479 AU - Tapia-Salazar M AU - Smith TK AU - Harris A AU - Ricque-Marie D AU - Cruz-Suarez LE AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Programa Maricultura, San Nicolas De Los Garza 66450, Nueovo Leon, MexicoUniv Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaRicque-Marie, D, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Programa Maricultura, Cd Univ,Apdo Postal F-56, San Nicolas De Los Garza 66450, Nueovo Leon, Mexico TI - Effect of dietary histamine supplementation on growth and tissue amine concentrations in blue shrimp Litopenaeus stylirostris AB - Recent studies have shown that feeding diets supplemented with fish meal containing high levels of biogenic amines to shrimp reduced growth and feed consumption. An improvement in growth, however, has been found in shrimp fed a diet supplemented with histamine and cadaverine. The objective of the current experiment was to provide more information about the effect of dietary histamine on the growth of blue shrimp Litopenaeus stylirostris and the impact on biogenic amine concentration in shrimp tissues. Six experimental diets were manufactured and supplemented with histamine at 0, 600, 1200, 2400, 3600 and 4800 mg kg(-1) and tested in a feeding trial for 28 days. Histamine supplementation did not have any effect on feed consumption, feed conversion ratio or survival. Weight gain fitted a quadratic dose response curve (P < 0.05), with maximum values at 1200 and 2400 mg kg(-1) of dietary histamine (weight gain being 8.8% higher than for the control), and lower growth at higher doses. Spermidine concentration in whole shrimp tissue increased linearly with dietary histamine supplementation. It was concluded that dietary histamine supplementation at the levels tested does not have any negative effect on shrimp performance. Moreover, an improvement in weight gain was observed when histamine was supplemented at moderate levels. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000166576800008 L2 - histamine;shrimp;growth performance;feeding and nutrition;toxicity;RAINBOW-TROUT; POLYAMINES; EROSION SO - Aquaculture 2001 ;193(3-4):281-289 4401 UI - 14464 AU - Tapia-Vargas M AU - Tiscareno-Lopez M AU - Stone JJ AU - Oropeza-Mota JL AU - Velazquez-Valle M AD - Inst Nacl Invest Forestales Agr & Pecuarias, Ctr Reg Invest Pacifico Ctr, SAGAR, Uruapan 1101, Michoacan, MexicoInst Nacl Invest Forestalesy Agropecuarias, Ctr Nacl Invest Prod Sostenible, Morelia, Michoacan, MexicoUSDA ARS, SW Watershed Res Ctr, Tucson, AZ, USAInst Recursos Nat Colegio Postgrad, Montecillo 56230, Edo Mexico, MexicoTapia-Vargas, M, Inst Nacl Invest Forestales Agr & Pecuarias, Ctr Reg Invest Pacifico Ctr, SAGAR, Av Latinamericana, Uruapan 1101, Michoacan, Mexico TI - Tillage system effects on runoff and sediment yield in hillslope agriculture AB - Runoff and soil erosion are major factors of land and lake degradation in the Patzcuaro Watershed located in Michoacan, Mexico. This non-point source pollution results from corn cultivation on steep cropland sites. In the local farming system, the soil is bare for much of the year and subject to frequent plowing and cultivation. Conservation tillage and the use of crop residues for soil protection have only recently been introduced in this region, Runoff plots (25m x 4m) were used to collect runoff (Q) and sediment yield (Sy) data to identify a tillage system that allows soil restoration. The groundwater loading effects of agricultural management systems (GLEAMS) model was calibrated using runoff and sediment information from four tillage treatments that evaluated soil erosion and estimate the long-term sustainability of current and alternative fanning systems. Four runoff plots planted with rainfed corn were used for these treatments: (1) conventional tillage (CT), (2) no-tillage without residue cover (NT-0), (3) no-tillage with 33% residue cover (NT-33), and (4) no-tillage with 100% residue cover (NT-100). The results indicated that CT and NT-0 treatments produced higher Q and Sy than those having residue cover. Simulated Sy of NT treatments was much better than simulated Sy of CTI based on their agreement with observed Sy, These results are relevant to recommend no-till agriculture as Best Management Practice for agricultural land requiring restoration activities. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000166586100006 L2 - tillage;sediment;GLEAMS;SOIL-EROSION SO - Field Crops Research 2001 ;69(2):173-182 4402 UI - 13611 AU - Taraci J AU - Tolle J AU - Kouvetakis J AU - McCartney MR AU - Smith DJ AU - Menendez J AU - Santana MA AD - Arizona State Univ, Dept Chem, Tempe, AZ 85287, USAArizona State Univ, Ctr Solid State Sci, Tempe, AZ 85287, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAIPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07738, DF, MexicoTaraci, J, Arizona State Univ, Dept Chem, Tempe, AZ 85287, USA TI - Simple chemical routes to diamond-cubic germanium-tin alloys AB - We report the development of a simple chemical route to growing Ge1-xSnx semiconductors using ultrahigh-vacuum chemical vapor deposition and the molecular precursor (Ph)SnD3 as the source of Sn atoms. Thin films were deposited on oxidized and oxide-free Si by reactions of (Ph)SnD3 with Ge2H6 at 350 degreesC. The composition, microstructure, and bonding properties of the films were characterized by Rutherford backscattering, high-resolution analytical electron microscopy, and Raman spectroscopy. As-deposited Ge1-xSnx on oxidized Si displayed good crystallinity which improved significantly by annealing at 400 degreesC. High-resolution electron microscopy and diffraction indicated a diamond-cubic structure with lattice constants intermediate to those of Ge and alpha -Sn. As-deposited Ge1-xSnx on pure Si was monocrystalline and epitaxial. Nanoprobe analysis in plan view and cross section revealed that the as-deposited and annealed materials were homogeneous with good chemical purity. The Raman spectra showed bands corresponding to Ge-Ge and Sn-Ge vibrations with frequencies consistent with a random tetrahedral alloy. (C) 2001 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000168996900013 L2 - MOLECULAR-BEAM EPITAXY; SNXGE1-X ALLOYS; GE1-XSNX ALLOYS; FILMS; GE(001)2X1; GROWTH SO - Applied Physics Letters 2001 ;78(23):3607-3609 4403 UI - 12927 AU - Taran YA AU - Bernard A AU - Gavilanes JC AU - Lunezheva E AU - Cortes A AU - Armienta MA AD - UNAM, Inst Geophys, Mexico City 04510, DF, MexicoFree Univ Brussels, B-1050 Brussels, BelgiumUniv Colima, Colima, Colima, MexicoUNAM, Inst Geol, Mexico City 04510, DF, MexicoTaran, YA, UNAM, Inst Geophys, Coyoacan, Mexico City 04510, DF, Mexico TI - Chemistry and mineralogy of high-temperature gas discharges from Colima volcano, Mexico. Implications for magmatic gas-atmosphere interaction AB - Gases, condensates and silica tube precipitates were collected from 400 degreesC (Z2) and 800 degreesC (Z3) fumaroles at Colima volcano, Mexico, in 1996-1998. Volcanic gases at Colima were very oxidized and contain up to 98% air-due to mixing with air inside the dome interior, close to the hot magmatic body. An alkaline trap method was used to collect gas samples, therefore only acidic species were analysed. Colima volcanic gases are water-rich (95-98 mol%) and have typical S/C/Cl/F ratios for a subduction type volcano. deltaD-values for the high-temperature Z3 fumarolic vapour vary from -26 to -57 parts per thousand. A negative deltaD-Cl correlation for the Z3 high-temperature fumarole may result from magma degassing: enrichment in D and decrease in the Cl concentration in condensates are likely a consequence of input of "fresh" batches of magma and an increasing of volcanic activity, respectively. The trace element composition of Colima condensates generally does not differ from that of other volcanoes (e.g. Merapi, Kudryavy) except for some enrichment in V, Cu and Zn. Variations in chemical composition of precipitates along the silica tube from the high-temperature fumarole (Colima 1, fumarole Z3), in contrast to other volcanoes, are characterized by high concentrations of Ca and V, low concentration of Mo and a lack of Cd. Mineralogy of precipitates differs significantly from that described for silica tube experiments at other volcanoes with reduced volcanic gas. Thermochemical modelling was used to explain why very oxidized gas at Colima does not precipitate halite, sylvite, and Mo- and Cd-minerals, but does precipitate V-minerals and native gold, which have not been observed before in mineral precipitates from reduced volcanic gases. (C) 2001 Elsevier Science B.V. All rights reserved MH - Belgium MH - Mexico|Colima MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000170855700015 L2 - volcanic gas;water isotopes;mineral precipitates (sublimates);Colima volcano;AUGUSTINE VOLCANO; MERAPI-VOLCANO; TRANSPORT; SYSTEMS; FRACTIONATION; EQUILIBRIA; INDONESIA; EMISSIONS; ORIGIN; GOLD SO - Journal of Volcanology and Geothermal Research 2001 ;108(1-4):245-264 4404 UI - 13268 AU - Tarango LA AU - Valdez R AU - Clemente F AU - Mendoza G AD - Colegio Postgrad, Salinas de Hidalgo 78600, SLP, MexicoNew Mexico State Univ, Dept Fisheries & Wildlife Sci, Las Cruces, NM 88003, USAColegio Postgrad, Ctr Ganaderia, Mexico City 56230, DF, MexicoTarango, LA, Colegio Postgrad, Campus San Luis Potosi ,Iturbide 73, Salinas de Hidalgo 78600, SLP, Mexico TI - Roost-site characteristics of Mexican spotted owls in Sierra Fria, Aguascalientes, Mexico MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - HASTINGS: RAPTOR RESEARCH FOUNDATION INC RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0892-1016 UR - ISI:000169919400012 L2 - Mexico;Aguascalientes;habitat characteristics;roost sites;Mexican Spotted Owl;Strix occidentalis lucida;Sierra Fria;Threatened Species;CHIHUAHUA SO - Journal of Raptor Research 2001 ;35(2):165-168 4405 UI - 13793 AU - Tartaj J AU - Fernandez JF AU - Villafuerte-Castrejon ME AD - CSIC, Inst Ceram & Vidrio, Electroceram Dept, Madrid 28500, SpainUNAM, Inst Invest Mat, Mexico City, DF, MexicoTartaj, J, CSIC, Inst Ceram & Vidrio, Electroceram Dept, Madrid 28500, Spain TI - Preparation of PbTiO3 by seeding-assisted chemical sol-gel AB - Lead Titanate has been prepared by a sol-gel method using titanium tetrabutoxide and lead acetate in stoichiometric proportion. It was found that the seeding with solid PbTiO3 nanometersize particles (5 and 10 wt%) into the precursor solution plays a crucial role during crystallisation. At 380 degrees and 400 degreesC, the fraction of crystallisation of the PbTiO3 perovskite phase for seeded sample is much higher than that corresponding to the unseeded one. Unseeded gel remained almost amorphous at 400"C, whereas the 5 and 10 wt% seeded gel was approximate to 50 and 85% crystalline. Besides, while unseeded calcined gels exhibit clearly the presence of pyrochlore phase at 425 degreesC, this phase was not detected for the 5 wt% calcined seeded gel. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000168362700008 L2 - ceramics;sol-gel chemistry;x-ray diffraction;thermogravimetric analysis;THIN-FILMS; CRYSTALLIZATION; TRANSFORMATION; GROWTH SO - Materials Research Bulletin 2001 ;36(3-4):479-486 4406 UI - 13135 AU - Taticek RA AU - Choi C AU - Phan SE AU - Palomares LA AU - Shuler ML AD - Cornell Univ, Sch Chem Engn, Ithaca, NY 14853, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62271, Morelos, MexicoShuler, ML, Cornell Univ, Sch Chem Engn, Ithaca, NY 14853, USA TI - Comparison of growth and recombinant protein expression in two different insect cell lines in attached and suspension culture AB - Culture conditions required for obtaining maximum recombinant protein concentrations from two cell lines, Spodoptera frugiperda (IPLB-Sf2l-AE) and Trichoplusia ni (Tn 5B--4), were determined in this work. Conditions studied include mode of culture (suspended vs attached), agitation rates, inoculum sizes, cell concentration at the time of infection, and various serum-free media (SFM). Results were compared with the performance of attached cultures in TnM-FH with 10% fetal bovine serum. Growth rates in the different culture media tested were similar, but the cell numbers achieved (i.e., yield) improved 2 to 2.7-fold in SFM over cultures in TnM-FH. Agitation rates of 150-160 rpm were necessary for maximum growth of suspended Tn 5B-1-4 cells compared to 125-150 rpm for Sf-21 cells. An inoculum size of 5 x 10(5) cells/mL gave good growth rates and optimum biomass yields for both cell lines. Cultures of both cell lines were infected with viruses encoding for beta -galactosidase or human secreted alkaline phosphatase (seAP). Protein expression in TnM-FH in attached culture showed that Tn 5B-1-4 cells are 2-4.5 times more productive on a per cell basis than Sf-21 cells grown under similar conditions. Production of beta -galactosidase in Sf-21 cells increased 50% in suspension cultures with SFM compared to attached cultures in TnM-FH, but seAP expression was essentially unchanged by culture techniques. The Tn 5B-1-4 cells produced 2.6-4.4 and 2.7-3 times more beta -galactosidase and seAP, respectively, in SFM in suspension compared to Sf-21 cells. EX-CELL 401 and Sf900-II were formulated as optimized SFM for Sf cell lines. However, in Sf-21 cultures EX-CELL 400 performed better than the other two media, as it increased the beta -galactosidase yield up to 25%. Surprisingly, EX-CELL 401 was the best medium for the production of beta -galactosidase by Tn 5B-1-4 cells, resulting in 25% and 69% higher volumetric and specific yields, respectively, compared to EX-CELL 405 which was formulated for this specific cell line. These results show that even when culture media are designed for maximal growth of a specific cell line, other media may provide the best conditions for protein production MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 8756-7938 UR - ISI:000170338000014 L2 - TEMPERATURE-SENSITIVE BACULOVIRUS; NUCLEAR-POLYHEDROSIS-VIRUS; SERUM-FREE MEDIUM; SPODOPTERA-FRUGIPERDA; BETA-GALACTOSIDASE; SYSTEM; OPTIMIZATION; DENSITY; VECTOR; GLYCOSYLATION SO - Biotechnology Progress 2001 ;17(4):676-684 4407 UI - 13035 AU - Tausz M AU - Hietz P AU - Briones O AD - Karl Franzens Univ Graz, Inst Pflanzenphysiol, A-8010 Graz, AustriaAgr Univ Vienna, Inst Bot, A-1180 Vienna, AustriaInst Ecol, Xalapa 91000, Veracruz, MexicoTausz, M, Karl Franzens Univ Graz, Inst Pflanzenphysiol, Schubertstr 51, A-8010 Graz, Austria TI - The significance of carotenoids and tocopherols in photoprotection of seven epiphytic fern species of a Mexican cloud forest AB - Epiphytes experience frequent and rapid changes in water availability and light intensity. The role of carotenoids and tocopherols in photoprotection of seven fern species (Asplenium cuspidatum Lam., Phlebodium areolatum (HB ex Willd.) Smith, Polypodium puberulum Schl. & Cham., Po. plebeium Schl. & Cham., Elaphoglossum glaucum Moode, E. petiolatum (Sw.) Urb., and Pleopeltis mexicana (Fee) Mickel & Beitel) with different adaptations against drought were investigated. The plants were sampled dark adapted (treatment I), and after light exposure with the substrate present (treatment II), with the substrate removed (treatment III) and with substrate and rhizomes removed (treatment IV) to induce increasing degrees of drought stress. The degree of dehydration reached does not result in permanent damage and was also observed in the field. While none of the treatments induced significant chlorophyll (chl) degradation, all plants showed strong de-epoxidation of the xanthophyll cycle on light exposure (up to a de-epoxidation state of 70%), but without an additional effect of desiccation. Most species showed a rapid increase (within hours) of carotenoids (mainly beta -carotene and lutein) and alpha -tocopherol on exposure. In A. cuspidatum, a species with no apparent adaptations to drought, drought stress in combination with light resulted in an increase of tocopherols from 35 nmol mu mol(-1) chl (treatment I) to 400 nmol (treatment IV). This effect was not significant in the drought-deciduous species with succulent rhizomes, Po. puberulum (about 10 nmol mu mol(-1) chl) and Ph. areolatum (5 to maximum 40 nmol), which experience little desiccation under field conditions. This short-term induction of tocopherols and carotenoids has not been reported for other plants under light stress and is probably related to the epiphytic life form MH - Austria MH - Mexico|Veracruz PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0310-7841 UR - ISI:000170594100005 L2 - antioxidants;Asplenium;carotenoids;drought;Elaphoglossum;epiphytes;ferns;Phlebodium;photooxidative stress;pigments;Pleopeltis;Polypodium;tocopherol;xanthophyll cycle;BETA-CAROTENE; GUZMANIA-MONOSTACHIA; OFFICINALIS PLANTS; ALPHA-CAROTENE; SPRUCE NEEDLES; RESPONSES; OXYGEN; STRESS; PHOTOSYNTHESIS; LIGHT SO - Australian Journal of Plant Physiology 2001 ;28(8):775-783 4408 UI - 14511 AU - Tavera FJ AU - Escudero R AU - Finch JA AD - Univ Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoMcGill Univ, Dept Min & Met Engn, Montreal, PQ, CanadaTavera, FJ, Univ Michoacana, Inst Invest Met, Santiago Tapia 403, Morelia 58000, Michoacan, Mexico TI - Gas holdup in flotation columns: laboratory measurements AB - The gas holdup in laboratory flotation columns was measured using a conductivity probe. Measurements in a 50-cm-diameter flotation column have shown that gas holdup varies radially depending on the sparging system array, surfactants addition, and spargers malfunctions. The column was run in two modes: unbaffled (open), and baffled(vertically). Radial differences in gas holdup are enhanced by using baffles if gas is not uniformly injected through the spargers in the flotation column; however, the gas holdup is the same among the quadrants of the baffled column when the gas is evenly injected. Drift flux analysis was applied to estimate bubble size; it was a bubble size radial distribution in the column that was consistent with the gas holdup. (C) 2001 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0301-7516 UR - ISI:000166337800003 L2 - frother;bubbles;column flotation;surface area flux SO - International Journal of Mineral Processing 2001 ;61(1):23-40 4409 UI - 12291 AU - Tejeda-Mansir A AU - Montesinos RM AU - Guzman R AD - Univ Sonora, Dept Invest Cient & Tecnol, Hermosillo 83000, Sonora, MexicoUniv Sonora, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Environm Chem & Engn, Tucson, AZ 85721, USATejeda-Mansir, A, Univ Sonora, Dept Invest Cient & Tecnol, Apartado Postal 593, Hermosillo 83000, Sonora, Mexico TI - Mathematical analysis of frontal affinity chromatography in particle and membrane configurations AB - The scaleup and optimization of large-scale affinity-chromatographic operations in the recovery, separation and purification of biochemical components is of major industrial importance. The development of mathematical models to describe affinity-chromatographic processes, and the use of these models in computer programs to predict column performance is an engineering approach that can help to attain these bioprocess engineering tasks successfully. Most affinity-chromatographic separations are operated in the frontal mode, using fixed-bed columns. Purely diffusive and perfusion particles and membrane-based affinity chromatography are among the main commercially available technologies for these separations. For a particular application, a basic understanding of the main similarities and differences between particle and membrane frontal affinity chromatography and how these characteristics are reflected in the transport models is of fundamental relevance. This review presents the basic theoretical considerations used in the development of particle and membrane affinity chromatography models that can be applied in the design and operation of large-scale affinity separations in fixed-bed columns. A transport model for column affinity chromatography that considers column dispersion, particle internal convection, external film resistance, finite kinetic rate, plus macropore and micropore resistances is analyzed as a framework for exploring further the mathematical analysis. Such models provide a general realistic description of almost all practical systems. Specific mathematical models that take into account geometric considerations and transport effects have been developed for both particle and membrane affinity chromatography systems. Some of the most common simplified models, based on linear driving-force (LDF) and equilibrium assumptions. are emphasized. Analytical solutions of the corresponding simplified dimensionless al'flinity models are presented. Particular methods for estimating the parameters that characterize the mass-transfer and adsorption mechanisms in affinity systems are described. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0165-022X UR - ISI:000172468700002 L2 - mathematical modelling;affinity chromatography;biomolecules;INTRAPARTICLE CONVECTIVE VELOCITY; DIFFUSIVE ADSORBENT PARTICLES; PERFUSION CHROMATOGRAPHY; PROTEIN ADSORPTION; COLUMN PERFORMANCE; FIXED-BED; CONFOCAL MICROSCOPY; SORPTION KINETICS; MICROSPHERE SIZE; IMMUNOGLOBULIN-G SO - Journal of Biochemical and Biophysical Methods 2001 ;49(1-3):1-28 4410 UI - 14244 AU - Telles E AU - Munoz-Tunon C AU - Tenorio-Tagle G AD - Observ Nacl, BR-20921400 Rio De Janeiro, BrazilInst Astrofis Canarias, E-38200 La Laguna, SpainINAOE, Puebla, MexicoTelles, E, Observ Nacl, Rua Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil TI - High-resolution spectroscopy of HII galaxies: Structure and supersonic line widths AB - We present high-resolution echelle spectroscopy of a sample of H II galaxies. In all galaxies we identify different H alpha -emitting knots along the slit crossing the nucleus. All of these have been isolated and separately analyzed through luminosity and size versus sigma diagnosis plots. We find that in all cases, for a particular galaxy, the bulk of the emission comes from their main knot and therefore, at least for the compact-class galaxies we are dealing with, luminosity and sigma values measured using single-aperture observations would provide results similar to those obtained with spatially resolved spectroscopy. In the size versus sigma plots, as expected, there is a shift in the correlations depending on whether we include all emission in a single point or split it into its different emitting knots. The problem of a proper determination of the size of the emitting region so that it can be used to determine the mass of the system remains open. From the data set gathered, using the highest surface brightness points as recently proposed by Fuentes-Masip et al., the best luminosity versus sigma correlation turns out to be consistent with a Virial model MH - Brazil MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000167204900013 L2 - galaxies : ISM;galaxies : kinematics and dynamics;galaxies : starburst;galaxies : structure;HII regions;H-II REGIONS; COMPACT DWARF GALAXIES; STAR-FORMING REGIONS; ENVIRONMENT; PARAMETERS; TURBULENCE; VII-ZW-403; EVOLUTION; SURFACE SO - Astrophysical Journal 2001 ;548(2):671-680 4411 UI - 12897 AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Mercado A AU - Smith D AU - Schnaas L AU - Aro A AU - Hu H AD - Natl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca, Morelos, MexicoUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USA TI - Bone lead mobilization during pregnancy among environmentally lead-exposed women MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000169334500195 SO - Epidemiology 2001 ;12(4):S46-S46 4412 UI - 13626 AU - Tellez CA AU - Hollauer E AU - da Silva MIP AU - Mondragon MA AU - Haiduc I AU - Curtui M AD - Univ Fed Fluminense, Dept Fisicoquim, Inst Quim, BR-24210150 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, Dept Quim, PUC Rio, BR-24210150 Rio De Janeiro, BrazilUNAM, Inst Fis, Dept Fis Aplicada & Tecnol Avanzada, Queretaro, Qro 76001, MexicoUniv Babes Bolyai, Dept Chem, R-3400 Cluj Napoca, RomaniaTellez, CA, Univ Fed Fluminense, Dept Fisicoquim, Inst Quim, Morro Valonguinho S-N, BR-24210150 Rio De Janeiro, Brazil TI - Density functional theory study of the Fourier transform infrared and Raman spectra of dichloro-bis(2,4-pentanedionate)tin(IV) AB - Fourier transform infrared and Fourier transform Raman spectra of dichloro-bis(2,4-pentanedionate)tin(IV) have been obtained. Density functional theory (DFT) BLYP calculations, have been carried out with the purpose of understanding the metal-ligand region spectra of this compound. Vibrational wavenumbers calculated by BLYP/6-31G* force fields are closed with the experimental results. The percentage of deviation of the bond lengths and bond angles gives a good picture of the normal modes, and serves as a basis for the assignment of the wavenumbers. The calculated geometrical parameters show slight differences compared with the experimental ones, and these differences can be explained by the different physical state of Sn(acac)(2)Cl-2. The DFT-BLYP calculations assumed a free molecule in the gas phase. The experimental wavenumbers are obtained from the spectra of solid samples. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Queretaro MH - Romania PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000168783600001 L2 - dichloro-bis(2,4-pentanedionate)tin(IV);vibrational spectra;DFT-calculations;COMPLEXES SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2001 ;57(6):1149-1161 4413 UI - 13864 AU - Tellez CA AU - Hollauer E AU - Mondragon MA AU - Castano VM AD - Univ Fed Fluminense, Inst Quim, Dept Fisicoquim, BR-24210150 Rio De Janeiro, BrazilUNAM, Inst Fis, Dept Fis Aplicada & Tecnol Avanzada, Queretaro 76001, Qro, MexicoTellez, CA, Univ Fed Fluminense, Inst Quim, Dept Fisicoquim, Morro Valonguinho S-N Niteroi Ctr, BR-24210150 Rio De Janeiro, Brazil TI - Fourier transform infrared and Raman spectra, vibrational assignment and ab initio calculations of terephthalic acid and related compounds AB - The Fourier transform infrared and Raman spectra of solid terephthalic acid, p-C6H4(COOH)(2), have been recorded, and the Fourier transform Raman spectra for the terephthalate anion were measured. The wavenumbers for the band positions have been calculated in order to assign them. Moller-Plesset (MP2) and Density functional theory (DFT) calculations have been carried out with Huzinaga-Dunning basis sets (DZV). Also, a normal coordinate analysis through the Wilson-El'yashevich method was performed. The differences between the calculated ab initio spectra and the spectra of the solid phase have been interpreted with respect to the different C-2h and C-i local symmetry in the gas and in the solid phase, respectively, and considering also the formation of long-chains of terephthalic acid in the solid phase. in spite to the absence of experimental data for the cis conformation, calculations have been carried out and structural parameters and infrared intensities have been evaluated for the trans and cis conformations of terephthalic acid. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000168216700005 L2 - terephthalic acid;Fourier transform infrared and Raman spectra;ab initio calculations;MP2 (Moller-Plesset) and DFT (Density functional theory);ELECTRON CORRELATION-ENERGY; PERTURBATION-THEORY SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2001 ;57(5):993-1007 4414 UI - 12370 AU - Tellez DAL AU - Aguiar JA AU - Yadava YP AU - Chavira E AU - Roa-Rojas J AD - Univ Nacl Colombia, Dept Fis, Bogota, ColombiaUniv Fed Pernambuco, Dept Fis, BR-50970901 Recife, PE, BrazilUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoRoa-Rojas, J, Univ Nacl Colombia, Dept Fis, AA 14490, Bogota, Colombia TI - Substrate characteristics of Ba2HoNbO6 for the fabrication of LaBaCaCu3O7-delta superconducting films AB - We have synthesized and studied the characteristics of Ba2HoNbO6 (BHNO) substrates for the fabrication of LaBaCaCu3O7-delta (LBCCO) superconducting films. BHNO has an A(2)BB'O-6 complex cubic perovskite structure with lattice constant a = 8,439 Angstrom. Energy-dispersive X-ray (EDX) analysis shows that BHNO is free from impurity traces and scanning electron micrographs reveal that it has uniform surface morphology and particle size distribution. Based on the doubling of the ABO(3) cubic perovskite unit cell, (1/2)a = 4,220 Angstrom, BHNO has fairly good lattice matching (lattice mismatch similar to9%) with LBCCO superconductors. X-ray diffractometry, back-scattered scanning electron microscopy and magnetic measurements effectuated on BHNO/LBCCO composites show that BHNO is chemically and physically compatible and it could be used as a potential substrate material for the growth of LBCCO superconducting films MH - Brazil MH - Colombia MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000172161000003 L2 - MAGNETIC-PROPERTIES; CHEMICAL-STABILITY; PEROVSKITE; SYSTEM SO - Modern Physics Letters B 2001 ;15(21):905-913 4415 UI - 14154 AU - Tellez G AU - Petrone VM AU - Escorcia M AU - Morishita TY AU - Cobb CW AU - Villasenor L AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Anim Prod Aves, Mexico City 04510, DF, MexicoLoveland Ind Inc, Greeley, CO 80632, USAOhio State Univ, Dept Vet Prevent Med, Columbus, OH 43210, USATellez, G, Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Anim Prod Aves, Mexico City 04510, DF, Mexico TI - Evaluation of avian-specific probiotic and Salmonella Enteritidis-, Salmonella Typhimurium-, and Salmonella Heidelberg-specific antibodies on cecal colonization and organ invasion of Salmonella Enteritidis in broilers AB - Salmonella Enteritidis colonizes the intestinal tract of poultry and causes foodborne illness in humans. Reduction of Salmonella Enteritidis colonization in the intestinal tract of poultry reduces potential carcass contamination during slaughter. The purpose of this study was to determine the effect of an avian-specific probiotic combined with Salmonella Enteritidis-, Salmonella Typhimurium-, and Salmonella Heidelberg-specific antibodies on the cecal colonization and organ invasion of Salmonella Enteritidis in broiler as well as on body weights. The treatment group was defined as chicks spray-vaccinated with Avian Pac Plus at the hatchery and given Avian Pac Plus for the first 3 days after placement. An intermediate treatment was given at 10 and 14 days, 2 days prior to vaccination and 2 days postvaccination. All birds were vaccinated with Newcastle disease vaccine, La Sota virus (one drop/eye) at 12 days of age. A final treatment was given 3 days preslaughter. The control group was defined as chicks not given Avian Pac Plus at any time. Six hours after oral administration of the probiotic suspension (treatment group) or water (control group) at placement, the chicks were challenged with Salmonella Enteritidis. All chickens were orally inoculated with 0.25 ml of Salmonella Enteritidis that contained 4 x 10(7) CFU/1.0 mi. Cecal colonization and organ invasion were evaluated for Salmonella Enteritidis on days 0, 1, 3, 7, 10, 17, 24, 31, 38, and 41. The probiotic-treated group had a significantly lower concentration of Salmonella Enteritidis cecal colonization at days 3, 7, 10, 17, 24, 31, 38, and 41 when compared to the nontreated, control group (P < 0.05). Similarly, there was a significant difference (P < 0.05) in the isolation of Salmonella Enteritidis from the internal organs (liver and spleen) when probiotic-treated and nonprobiotic-treated groups were compared. There was no significant difference (P > 0.05) in the mean body weight between the two experimental groups at each collection period. These results indicated that a combination of Lactobacillus acidophilus, Streptococcus faecium, and Salmonella Enteritidis, Salmonella Typhimurium, and Salmonella Heidelberg-Specific antibodies have a beneficial effect in reducing the colonization of Salmonella Enteritidis in market-aged broilers MH - Mexico|Distrito Federal MH - USA PB - DES MOINES: INT ASSOC MILK FOOD ENVIRONMENTAL SANITARIANS, INC RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000167326800001 L2 - DIETARY LACTOSE; COMPETITIVE-EXCLUSION; ESCHERICHIA-COLI; CHICKS; PREVENTION; CULTURES; FLORA; LACTOBACILLI; INFECTION; BACTERIA SO - Journal of Food Protection 2001 ;64(3):287-291 4416 UI - 12613 AU - Tellez I AU - Kelber J AU - Moreno F AU - Paz A AU - Colorado AH AD - Hosp Angeles Lomas, Mexico City, DF, MexicoDept Publ Hlth, San Francisco, CA, USADept Hlth & Human Serv, San Diego, CA, USA TI - Renal tuberculosis in Mexico City MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000171226900351 SO - Clinical Infectious Diseases 2001 ;33(7):1144-1144 4417 UI - 13014 AU - Tempesta P AU - Turbiner AV AU - Winternitz P AD - Univ Lecce, Dipartimento Fis, I-73100 Lecce, ItalyIst Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, ItalyUniv Paris Sud, Phys Theor Lab, Paris, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaTempesta, P, Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy TI - Exact solvability of superintegrable systems AB - It is shown that all four superintegrable quantum systems on the Euclidean plane possess the same underlying hidden algebra sl(3). The gauge-rotated Hamiltonians, as well as their integrals of motion, once rewritten in appropriate coordinates, preserve a flag of polynomials. This flag corresponds to highest-weight finite-dimensional representations of the sl(3)-algebra, realized by first-order differential operators. (C) 2001 American Institute of Physics MH - Canada MH - France MH - Italy MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 33 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000170590300013 L2 - CALOGERO-MOSER SYSTEM; LIE-ALGEBRAS; WINTERNITZ SYSTEM; EUCLIDEAN-SPACE; N=2 SYSTEMS; MOTION; POTENTIALS; SYMMETRIES; CONSTANTS SO - Journal of Mathematical Physics 2001 ;42(9):4248-4257 4418 UI - 12419 AU - Terlevich E AU - Terlevich R AU - Melnick J AD - INAOE, Puebla, MexicoIoA, Cambridge, EnglandESO, Santiago, ChileTerlevich, E, INAOE, Puebla, Mexico TI - The L-sigma relation in HII galaxies: Cosmological relevance AB - We re-investigated the use of the Hubble diagram to measure the cosmological constant (Lambda) and the mass density of the Universe (Omega (M)). We find an important focusing effect in Lambda for redshifts about 3. This effect implies that the apparent magnitude of a standard candle at redshifts z=2-3 has almost no dependence on Lambda for Omega (M) >0.2. This means that Omega (M) can be measured independently of Omega (Lambda) by targeting the redshift range according to an estimate of the value of Omega (M). We explore the evidence in support of the suggestion that extreme starburst galaxies also known as HII galaxies can be used as distance estimators over a wide range of redshifts and reaching very high values. We have compiled literature data of HII galaxies up to z similar to 3 and found a good correlation between their luminosity and velocity dispersion measured from their strong emission lines, thus confirming the correlation already known to exist for HII galaxies in the nearby Universe. Several systematic effects such as age, extinction, kinematics, and metallicity are discussed as well as the effects of different cosmologies MH - Chile MH - United Kingdom MH - Mexico|Puebla PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900160 L2 - HII regions;cosmology;distance scale SO - Astrophysics and Space Science 2001 ;277():605-605 4419 UI - 13187 AU - Terrones H AU - Hayashi T AU - Munoz-Navia M AU - Terrones M AU - Kim YA AU - Grobert N AU - Kamalakaran R AU - Dorantes-Davila J AU - Escudero R AU - Dresselhaus MS AU - Endo M AD - IPICyT, San Luis Potosi 78210, SLP, MexicoUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoUASLP, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, SLP, MexicoUniv Sussex, Sch Chem Phys & Environm Sci, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Res, D-70174 Stuttgart, GermanyUNAM, Inst Invest Mat, Mexico City 01000, DF, MexicoMIT, Cambridge, MA 02139, USATerrones, M, IPICyT, Venustiano Carranza 2425-A,Col Los Filtros, San Luis Potosi 78210, SLP, Mexico TI - Graphitic cones in palladium catalysed carbon nanofibres AB - High yields of graphitic conical nanofibres (5-70 nm OD; <5 mum long) are produced by pyrolysing palladium precursors under Ar at 850-1000 degreesC. The fibres exhibit diamond-shaped Pd particles at their tips, which are responsible for the formation of stacked graphene cones (open, lampshade-type, or closed). The cones observed with apex angles of ca. 30 degrees, 50 degrees and 70 degrees can be explained by an open cone approach, which considers different chiralities. Due to the presence of open edges (dangling bonds), we envisage that these novel nanofibres may find important applications in the fabrication of field emitters, gas storage components and composites. (C) 2001 Elsevier Science BN. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 63 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000170235700009 L2 - NANOTUBES SO - Chemical Physics Letters 2001 ;343(3-4):241-250 4420 UI - 12163 AU - Tessieri L AU - Izrailev FM AD - Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, CanadaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoTessieri, L, Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada TI - One-dimensional quantum models with correlated disorder versus classical oscillators with colored noise AB - We perform an analytical study of the correspondence between a classical oscillator with frequency perturbed by a colored noise and the one-dimensional Anderson-type model with weak correlated diagonal disorder. It is rigorously shown that localization of electronic states in the quantum model corresponds to exponential divergence of nearby trajectories of the classical random oscillator. We discuss the relation between the localization length for the quantum model and the rate of energy growth for the stochastic oscillator. Finally, we examine the problem of electron transmission through a finite disordered lattice by considering the evolution of the classical oscillator MH - Canada MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000172726400025 L2 - LINEAR-DIFFERENTIAL EQUATIONS; CUMULANT EXPANSION; ANDERSON MODEL; MOBILITY EDGE; LOCALIZATION SO - Physical Review e 2001 ;64(6): 4421 UI - 14505 AU - Thalasso F AU - Razo-Flores E AU - Ancia R AU - Naveau HP AU - Nyns EJ AD - Univ Catholique Louvain, Bioengn Unit, B-1348 Louvain, BelgiumThalasso, F, CINVESTAV, IPN, Ctr Res & Adv Studies, Dept Biotechnol & Bioengn, Av IPN 2508, Mexico City, DF, Mexico TI - Pressure-drops control strategy in a fixed-bed reactor AB - This paper presents a strategy to control pressure-drops (head lass) in a biofilter designed according to the "Mist-Foam" concept. This concept is based on the mixing of the gaseous substrate and a liquid nutrient solution with an atomization nozzle to generate a mist passing subsequently through a synthetic polyurethane foam. In this type of bioreactor, the microbial growth reduces progressively the empty bed volume of the biofilter and causes an increase in the pressure-drops. This phenomenon can result in a complete clogging of the biofilter. The strategy of pressure-drops control presented here consists of successive interruption of the liquid flow, automatically controlled, resulting in a drying effect of the biomass. Tested during a 160 days experiment, this system has permitted to reduce and stabilize the pressure-drops in a biofilter in which the carrier exhibited a high likelihood of clogging. (C) 2001 Published by Elsevier Science B.V MH - Belgium MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0304-3894 UR - ISI:000166375200007 L2 - biofilter;clogging;biomass;pressure-drops;control;BIOMASS CONTROL; AIR; PURIFICATION; BIOREACTOR; TOLUENE SO - Journal of Hazardous Materials 2001 ;81(1-2):115-122 4422 UI - 13795 AU - Tinoco R AU - Pickard MA AU - Vazquez-Duhalt R AD - UNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Alberta, Dept Biol Sci, Edmonton, AB, CanadaVazquez-Duhalt, R, UNAM, Inst Biotecnol, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Kinetic differences of purified laccases from six Pleurotus ostreatus strains AB - Aims: Enzyme kinetics of purified laccases from six different Pleurorus ostreatus strains were determined in the oxidation of syringaldazine, guaiacol and ABTS. Methods and Results: Significant differences in the kinetic constants were found. Catalytic activity (k(cat)) ranged from 19 to 941 U mg(-1) for syringaldazine, from 18 to 1565 U mg-l for ABTS, and from 4 to 44 U mg-l for guaiacol. The apparent affinity constants (K-M) also showed significant differences between the different strains, from 12 to 52 mu mol l(-1) for syringaldazine, from 8 to 79 mu mol l(-1) for ABTS, and from 0.46 to 6.61 mmol l(-1) for guaiacol. No differences were found either on the effect of increasing concentrations of organic solvent (acetonitrile) or on the activity pH profile. The temperature profile was the same for all the P. ostreatus strains, except for the IE8 strain, which seems to be more sensitive to temperature. The kinetic and stability data from the six P. ostreatus strains were also compared with those obtained from other white rot fungi, Coriolopsis gallica and Trametes versicolor, showing clear differences. Conclusions: The different P. ostreatus isolates show-ed different kinetic constants. Significance and Impact of the Study: The different enzymatic properties of laccases from various P. ostreatus strains should be considered for a potential industrial or environmental application MH - Canada MH - Mexico|Morelos PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0266-8254 UR - ISI:000168378000009 L2 - WHITE-ROT FUNGI; POLYCYCLIC AROMATIC-HYDROCARBONS; OXIDATION; BIODEGRADATION; MINERALIZATION; OXIDASES; ENZYMES; PROFILE SO - Letters in Applied Microbiology 2001 ;32(5):331-335 4423 UI - 14369 AU - Titov OY AU - Meriuts A AU - Espejo G AU - Volovichev IN AU - Gurevich YG AU - Lyubimov OI AD - Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, IsraelKharkov Politech Univ, UA-310002 Kharkov, UkraineInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoKharkov State Univ, Dept Phys, UA-310077 Kharkov, UkraineTitov, OY, Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel TI - Thermal and electric transport in semiconductors under a thermal field: emergence of nonequilibrium charge carriers AB - A new point of view on thermoelectric phenomena as a transport process of nonequilibrium charge carriers is presented. It is shown that Fermi quasilevels which characterise transport in systems far from equilibrium can he nonmonotonic functions of position. The role of recombination in forming thermoelectric phenomena is discussed for the first time. It is shown that in the presence of thermal fields a new term in the expression for recombination appears which depends on the inhomogeneity of the temperature field. If electron and hole temperatures are different, which is typical of semiconductors, then one more new term appears in the expression for recombination proportional to the difference of electron and hole temperatures. A new method for the characterisation of semiconductor materials connected with the measurement of thermopower is proposed. It is shown that nonstationary thermal fields are best suited for this purpose MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - LONDON: PION LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Mechanics;Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0018-1544 UR - ISI:000166760000009 SO - High Temperatures-High Pressures 2001 ;33(1):65-71 4424 UI - 14128 AU - Toledo HMH AU - Dultzin-Hacyan D AU - Sulentic JW AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAToledo, HMH, Univ Nacl Autonoma Mexico, Inst Astron, Apdo 70-264, Mexico City 04510, DF, Mexico TI - Statistical properties of the emission in mixed-morphology (E+S) pairs. II. MIR/FIR results AB - We present a statistical analysis of mid/far-IR emission properties for a mixed morphology (E/S0+S/I) sample of galaxy pairs based on a new co-addition of the IRAS database. The sample is large and diverse enough (similar to 130 pairs) to permit discrimination of pairs by component morphologies and interaction classes. It samples a large enough volume of space to enable a nonparametric estimate of the far-infrared luminosity function (FIRLF). We find average factors of 3 and 5 enhancement in FIR and 25 mum luminosities, respectively, for the late-type components relative to an isolated galaxy control sample. This is interpreted as the MIR/FIR signature of interaction induced star formation. A more detailed study reveals (1) a strong correlation between the IR luminosity and interaction class, (2) a poor anticorrelation between IR luminosity and projected separation in pairs where 25 km seems to be more sensitive than FIR, (3) an increase in the ratio of present to past star formation (IR luminosities scaled to L-B luminosity) from early to late type spiral pair components, and (4) a high-mass (M greater than or equal to 10 M.) star formation rate (SFR) higher in paired Sc spirals than that in isolated Sc galaxies by a factor similar to2-3 MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000167582800009 L2 - galaxies : evolution;galaxies : interactions;galaxies : luminosity function, mass function;FAR-INFRARED EMISSION; ENHANCED STAR FORMATION; HIGH GALACTIC LATITUDES; BRIGHT GALAXY SAMPLE; SPIRAL GALAXIES; INTERACTING GALAXIES; IRAS OBSERVATIONS; LUMINOSITY FUNCTIONS; MARKARIAN GALAXIES; TIDAL INTERACTION SO - Astronomical Journal 2001 ;121(3):1319-1335 4425 UI - 10992 AU - Tomas SA AU - Harren FJM AD - IPN, CINVESTAV, Dept Phys, Mexico City 07360, DF, MexicoUniv Nijmegen, Dept Mol & Laser Phys, NL-6500 GL Nijmegen, NetherlandsTomas, SA, IPN, CINVESTAV, Dept Phys, AP 14-740, Mexico City 07360, DF, Mexico TI - Kinetics of ethanol and acetaldehyde production in fermenting wheat dough by laser-based trace gas detection AB - The fermentation process of wheat dough was studied by laser-based trace gas detection. A CO-laser-driven photoacoustic spectrometer was used to monitor simultaneously, in real time. the ethanol and acetaldehyde production rates of two commercial types of active dry yeast (Saccharomyces cerevisiae) in wheat dough substrates. Both types of yeast, O and B, produced ethanol for 5 hours. Acetaldehyde was yielded only during 100 minutes by the yeast O. whereas the yeast B generated this compound for 3.5 hours. The total ethanol and acetaldehyde productions amounted to 1.50 mL/g dough and 4.5 muL/g dough in the O case, and 0.84 mL/g dough and 14.75 muL/g dough, in the B case, respectively, The yeasts were also tested for their ability to metabolize mixes consisting of the control wheat dough substrate and extra amounts of glucose or maltose. Both types of yeasts showed a similar ability to consume the added glucose, however, only the yeast B was found to possess an adapted enzymatic system to metabolize maltose. This work showed the efficiency of applying photoacoustic trace gas detection to food technology research for on-line monitoring of fermenting wheat dough MH - Mexico|Distrito Federal MH - Netherlands PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1082-0132 UR - ISI:000175957200002 L2 - trace gas detection;CO laser;photoacoustics;wheat dough fermentation;ethanol;acetaldehyde;CO-LASER; BAKERS-YEAST; EMISSION; SYSTEM; H2O SO - Food Science and Technology International 2001 ;7(4):307-315 4426 UI - 12800 AU - Tonneau F AU - Sokolowski MBC AD - Univ Guadalajara, Ctr Estudios & Invest Comportamiento, Guadalajara 45030, Jalisco, MexicoUniv Picardie, Fac Philosophie Sci Humaines & Sociales, F-80025 Amiens, FranceTonneau, F, Univ Guadalajara, Ctr Estudios & Invest Comportamiento, Guadalajara 45030, Jalisco, Mexico TI - Is operant selectionism coherent? AB - Hull et al.'s analysis of operant behavior in terms of interaction and replication does not seem consistent with a genuine selection model. The putative replicators do not replicate, and the overall process is more reminiscent of directed mutation than of natural selection. General analogies between natural selection and operant reinforcement are too superficial to be of much scientific use MH - France MH - Mexico|Jalisco PB - PORT CHESTER: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Psychology, Biological;Behavioral Sciences;Neurosciences U5 - J;Editorial Material AV - English IS - 0140-525X UR - ISI:000171155500092 SO - Behavioral and Brain Sciences 2001 ;24(3):558-+ 4427 UI - 14435 AU - Torchinskaya TV AU - Korsunskaya NE AU - Khomenkova LY AU - Dhumaev BR AU - Prokes SM AD - USN, Res Lab, Washington, DC 20375, USANatl Acad Sci, Inst Semicond Phys, UA-252028 Kiev, UkraineInst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoProkes, SM, USN, Res Lab, Code 6862,4555 Overlook Ave SW, Washington, DC 20375 USA TI - The role of oxidation on porous silicon photoluminescence and its excitation AB - The effect of preparation regimes on the oxide composition, the number of dangling bonds, the photoluminescence and its excitation spectra have been investigated. The influence of the oxidation process during aging of porous silicon at ambient atmosphere and annealing in dry oxygen has been investigated via photoluminescence (PL), PL excitation (PLE), electron paramagnetic resonance (EPR) and X-ray photoelectron emission spectroscopy (XPS). Results indicate a direct correlation between the suboxide content and the PL intensity, while no correlation was noted between the PL intensity and the concentration of Si dangling bonds (non-radiative recombination centers). These results given further support to a suboxide-related color center as the source of the intense red luminescence. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 21 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000166467800015 L2 - photoluminescence;porous silicon;nanocrystalline silicon;suboxide;VISIBLE PHOTOLUMINESCENCE; LUMINESCENCE; OXYGEN; SI; CONFINEMENT; ORIGIN; MODEL SO - Thin Solid Films 2001 ;381(1):88-93 4428 UI - 11829 AU - Torchynska T AU - guilar-Hernandez J AU - Cano AID AU - Contreras-Puente G AU - Espinoza FGB AU - Vorobiev YV AU - Goldstein Y AU - Many A AU - Jedrzejewski J AU - Bulakh BM AU - Scherbina LV AD - UPALM, Inst Politecn Nacl, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Unidad Queretaro, Queretaro, MexicoHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelUkrainian Acad Sci, Inst Semicond Phys, UA-252028 Kiev, UkraineTorchynska, T, UPALM, Inst Politecn Nacl, Mexico City 07738, DF, Mexico TI - Defect related photoluminescence in Si wires AB - Photoluminescence spectra and their dependence on the temperature have been used to study the peculiarities of the red photoluminescence in low-dimensional Si structures, such as porous silicon and silicon oxide films with an admixture of silicon. It has been shown that red photoluminescence band of Si wires is complex and can be decomposed into two elementary bands. Practically the same positions of photoluminescence bands are observed in silicon oxide films. Comparative investigation of photoluminescence temperature dependence in Si wires and silicon oxide indicates that oxide defect related mechanisms for photoluminescence bands are involved. The photoluminescence excitation mechanisms in both objects are discussed as well. (C) 2001 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000173660100278 L2 - Si wires;porous silicon;photoluminescence;silicon oxide;POROUS SILICON; VISIBLE PHOTOLUMINESCENCE; EXCITATION; LUMINESCENCE; NANOCRYSTALS; GLASS; BAND SO - Physica B-Condensed Matter 2001 ;308():1108-1112 4429 UI - 12478 AU - Torchynska T AU - Polupan G AU - Zelocuatecatl FC AU - Scherbina E AD - Inst Politecn Nacl, UPALM, Mexico City 07738, DF, MexicoNatl Tech Univ Ukraine KPI, UA-252056 Kiev, UkraineTorchynska, T, Inst Politecn Nacl, UPALM, Mexico City 07738, DF, Mexico TI - Application of III-V materials in space solar cell engineering AB - The present paper is the review of current situation in space solar cell engineering. The comparison of the more popular GaAs, AlGaAs, InGaP and InP solar cell parameters, as well as their variation with temperature rise, radiation treatments and improving design have been represented. The typical working conditions for solar cells on the space orbit and requirements for solar cells are analysed. The modem international space projects, applied new types of IH-V material solar cells, have discussed as well MH - Mexico|Distrito Federal MH - Ukraine PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900006 SO - Modern Physics Letters B 2001 ;15(17-19):593-596 4430 UI - 13161 AU - Torga J AU - Marconi MC AU - Garcia-Segundo C AU - Villagran-Muniz M AD - Univ Buenos Aires, Lab Elect Cuant, Dept Fis, FCEyN, Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Ctr Instrumentos, Lab Opt Aplicada, Mexico City 04510, DF, MexicoTorga, J, Univ Tecnol Nacl Reg Delta, Fac Ingn, Optoelect Labs, RA-2804 Campana, Prov Buenos Air, Argentina TI - Ultra-fast dynamics in Coumarin 153 obtained by differential fluorescence AB - We present measurements of the molecular rotational diffusion dynamics in the picosecond scale in a Coumarin 153 ethylene-glycol solution. A novel technique is used in which the fluorescent sample is excited with two femtosecond laser pulses in a pump and probe scheme. The spatial anisotropy generated by the first pulse excitation is sampled as a function of delay time through the fluorescence produced by the delayed pulse. The rotational time is obtained from the change in the fluorescence produced as a function of the delay time. (C) 2001 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000170134300026 L2 - rotational depolarization;time-resolved fluorescence;rotational diffusion time SO - Optics Communications 2001 ;195(1-4):215-219 4431 UI - 10991 AU - Torrelles JM AU - Rodriguez LF AU - Anglada G AD - CSIC, IEEC, ES-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, ES-08034 Barcelona, SpainUNAM, Astron Inst, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainTorrelles, JM, CSIC, IEEC, Gran Capita 2, ES-08034 Barcelona, Spain TI - Twin, aligned protoplanetary disks around the components of the young binary system L1551 IRS5 AB - VLA 7 mm continuum observations carried out by Rodriguez et al. (1998) with 0.06" resolution toward L1551 IRS5 have shown two resolved dust sources. Both sources are elongated with almost the same orientation, similar flux densities, and similar angular sizes, being interpreted by these authors as a system of twin, aligned protoplanetary disks of 10 AU radius around the components of a young binary of 50 AU separation. These protoplanetary disks, the smaller ones ever imaged at mm wavelengths, are about a factor of ten smaller than disks around isolated stars, but have enough mass to form solar systems similar to our own. The fact that the disks are aligned with each other argues in favor for long-lived planetary systems in this binary. We all look forward to the future development of interferometers such as the EVLA, SMA, and ALMA in order to characterize the physical conditions of these associated protoplanetary disks by detecting spatially resolved molecular line emission. With these upcoming interferometers it will be possible to make great strides forward in our knowledge of the star formation processes MH - Mexico|Michoacan MH - Spain PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article AV - English IS - 0074-1809 UR - ISI:000175996700016 L2 - OUTFLOW SO - Formation of Binary Stars 2001 ;(200):132-135 4432 UI - 12620 AU - Torrelles JM AU - Patel NA AU - Gomez JF AU - Ho PTP AU - Rodriguez LF AU - Anglada G AU - Garay G AU - Greenhill L AU - Curiel S AU - Canto J AD - CSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAInst Nacl Tecn Aeroespacial, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUniv Chile, Dept Astron, Santiago, ChileUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoTorrelles, JM, CSIC, Inst Estudis Espacials Catalunya, C Gran Capita 2-4, E-08034 Barcelona, Spain TI - Discovery of linear "building blocks" of water masers shaping linear/arcuate microstructures in Cepheus A AB - We report three epochs of VLBA water maser observations toward the radio jet Cepheus A HW2. The VLBA data show that some of the masers detected previously with the VLA unfold into unexpected and remarkable linear/arcuate "microstructures," revealing, in particular three filaments (R1, R2, R3) with length sizes similar or equal to3-25 mas (2-18 AU) and unresolved in the perpendicular direction (less than or similar to0.1 AU), an arcuate structure (R4-A) of similar or equal to 20 mas size (15 AU), and a curved chain of masers (R5; which we have previously reported) of similar or equal to 100 mas size (similar or equal to 72 AU). Some of these structures unfold into even smaller linear "building blocks" (down to scales of 0.4 AU) shaping the "larger" structures. The flattened appearance of these small pieces argues strongly for a shock nature. Both the morphology and the observed proper motions found in these water maser structures have allowed us to identify at least three different centers of star formation activity in a region of similar or equal to 300 mas (200 AU) projected radius, unknown previously, and that could constitute a triple star system. We suggest that R1, R2, and R3, which are located close to the HW2 radio jet but offset by similar or equal to 200 mas with respect to its axis, could originate at the shocked walls of an inner cavity excavated by the HW2 wind in the circumstellar molecular gas. The presence of a wide-angle wind associated with the central HW2 object is implied. We also propose that the arcuate structure R4-A corresponds to a bow-shock structure produced by the wind of an undetected protostar (which we predict to be located toward the southeast of R4-A, similar or equal to 200 mas south from HW2). Finally, the third energy source of this small region could be that one exciting the arc R5, which, as we have previously reported, is expanding and related to an unidentified protostar located similar or equal to 600 mas south of HW2. The flux density of the water masers of the R5 arc excited by this unknown protostar (similar to 500 Jy) represents an important fraction (similar to 50%) of the total flux density of the maser emission in the entire Cepheus A star-forming region, suggesting that the exciting object could be a high-mass star. Furthermore, we find that the center of the circle, which Dt the R5 arc structure for each epoch, is moving with a velocity of similar to6 km s(-1). This could be caused by proper motions of the associated protostar because of relative orbital motions within the triple star system formed by HW2 and the energy sources of the R4-A and R5 structures MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 26 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000171652000031 L2 - ISM : individual (Cepheus A);ISM : jets and outflows;masers;stars : formation;STAR-FORMING REGION; THERMAL RADIO JET; BIPOLAR OUTFLOW; H2O MASERS; A HW2; CONTINUUM; EMISSION; IMAGES SO - Astrophysical Journal 2001 ;560(2):853-864 4433 UI - 13756 AU - Torrelles JM AU - Patel NA AU - Gomez JF AU - Ho PTP AU - Rodriguez LF AU - Anglada G AU - Garay G AU - Greenhill L AU - Curiel S AU - Canto J AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACSIC, IEEC, ES-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, ES-08034 Barcelona, SpainINTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 28080, SpainUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUniv Chile, Dept Astron, Santiago, ChileNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoHo, PTP, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - Spherical episodic ejection of material from a young star AB - The exact processes by which interstellar matter condenses to form young stars are of great interest, in part because they bear on the formation of planets like our own from the material that fails to become part of the star. Theoretical models suggest that ejection of gas during early phases of stellar evolution is a key mechanism for removing excess angular momentum, thereby allowing material to drift inwards towards the star through an accretion disk(1,2). Such ejections also limit the mass that can be accumulated by the stellar core(1,2). To date, these ejections have been observed to be bipolar and highly collimated, in agreement with theory. Here we report observations at very high angular resolution of the proper motions of an arc of water-vapour masers near a very young, massive star in Cepheus. We rnd that the arc of masers can be fitted to a circle with an accuracy of one part in a thousand, and that the structure is expanding. Only a sphere will always produce a circle in projection, so our observations strongly suggest that the perfectly spherical ejection of material from this star took place about 33 years earlier. The spherical symmetry of the ejecta and its episodic nature are very surprising in the light of present theories MH - USA MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 34 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000168710000038 L2 - THERMAL RADIO JET; CEPHEUS-A HW2; WATER MASERS; MASS OUTFLOW; H2O MASERS; REGIONS; MOTION SO - Nature 2001 ;411(6835):277-280 4434 UI - 14641 AU - Torrentera FA AU - Glaichenhaus N AU - Laman JD AU - Carlier Y AD - Free Univ Brussels, Fac Med, Parasitol Lab, B-1070 Brussels, BelgiumCNRS, Inst Pharmacol Mol & Cellulaire, F-06560 Valbonne, FranceErasmus Univ, Dept Immunol, NL-3000 DR Rotterdam, NetherlandsInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Inmunol, Mexico City, DF, MexicoCarlier, Y, Free Univ Brussels, Fac Med, Parasitol Lab, CP 616,Route Lennik 808, B-1070 Brussels, Belgium TI - T-cell responses to immunodominant LACK antigen do not play a critical role in determining susceptibility of BALB/c mice to Leishmania mexicana AB - Although BALB/c mice develop lesions when infected with Leishmania mexicana, the mechanisms which are responsible for susceptibility to this parasite have not been elucilaated. In contrast, susceptibility of BALB/c mice to Leishmania major has been shown to depend on the early production of interleukin-4 (IL-4) by T cells which react to the parasitic LACK antigen. Here, we demonstrate that the lesions induced by L. mexicana are delayed compared to those induced by L. major but rapidly develop at later time points. Interestingly, while LACK-tolerant BALB/c-derived IE-LACK transgenic mice were resistant to L. major, they were susceptible to L. mexicana and developed lesions similar to those observed in wild-type BALB/c mice. The latter result was observed despite the fact that (i) LACK was expressed by L mexicana, (ii) splenocytes from BALB/c mice were able to stimulate LACK-specific T-cell hybridoma cells when incubated with live L. mexicana promastigotes, and (iii) LACK-specific T cells contributed to IL-4 production in L. mexicana-infected BALB/c mice. Thus, in contrast to what was observed for L. major-infected mice, LACK-specific T cells do not play a critical role in determining susceptibility to L. mexicana. Although BALB/c mice :are susceptible to both L. major and L. mexicana, the mechanisms which are responsible for susceptibility to these parasites are likely to be different MH - Belgium MH - France MH - Mexico|Distrito Federal MH - Netherlands PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000165943500084 L2 - INFECTED MACROPHAGES; CUTANEOUS LEISHMANIASIS; CYSTEINE PROTEINASES; IL-4; PROMASTIGOTES; DISRUPTION; LESIONS SO - Infection and Immunity 2001 ;69(1):617-621 4435 UI - 13172 AU - Torres-Garcia E AU - Pelaiz-Barranco A AU - Vazquez-Ramos C AU - Fuentes GA AD - Univ Autonoma Metropolitana Iztapalapa, Area Ingn Quim, Mexico City 09340, DF, MexicoUniv La Habana, Fac Quim, Inst Mat & React, Havana 10400, CubaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoFuentes, GA, Univ Autonoma Metropolitana Iztapalapa, Area Ingn Quim, Mexico City 09340, DF, Mexico TI - Thermal and structural characterization of the ZrO2-x(OH)(2x) to ZrO2 transition AB - The exothermic process that occurs around 700 K during calcination of ZrO2-x(OH)(2x), associated with the crystallization of the low-temperature tetragonal metastable phase of ZrO2, was analyzed using x-ray diffraction, high-resolution thermogravimetric analysis (TGA), nitrogen adsorption, and modulated differential scanning calorimetry (MI)SQ. High-resolution TGA allowed us to determine the water loss, resulting from condensation of OH- groups. The amount was 0.137 wt% in our case, equivalent to 1.7 x 10(-2) Mol of H2O/mol of ZrO2. That corresponds to about one -OH group per nm(2) being lost in that process. By using NMSC we determined that the change in enthalpy (DeltaH(global) = -15.49 kJ/mol of ZrO2) was the result of two parallel contributions. One of them was reversible and endothermic (DeltaH(rev) = 0.11 kJ/mol of ZrO2), whereas the other was irreversible and exothermic (DeltaH(irrev) = -15.60 kJ/mol of ZrO2). The variability and magnitude of the exotherm, as well as the fact that the accompanying weight loss is so small, are consistent with a mechanism involving the formation of tetragonal nuclei, rather than global crystallization, and hence depend on the number of nuclei so formed MH - Cuba MH - Mexico|Distrito Federal PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000170227500009 L2 - TETRAGONAL ZRO2; SIZE DEPENDENCE; TEMPERATURE; ZIRCONIA; SUPPORT; POWDER SO - Journal of Materials Research 2001 ;16(8):2209-2212 4436 UI - 12879 AU - Torres-Sanchez R AU - Garcia-Vargas J AU - fonso-Alonso A AU - Martinez-Gomez L AD - Univ Michoacana de San Nicolas de Hidalgo, Inst Invest Met, Morelia 58000, Michoacan, MexicoUniv Cent La Villas, Ctr Invest Soldadura, Santa Clara, CubaUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoTorres-Sanchez, R, Univ Michoacana de San Nicolas de Hidalgo, Inst Invest Met, Apartado Postal 52-B, Morelia 58000, Michoacan, Mexico TI - Corrosion of AISI 304 stainless steel induced by thermophilic sulfate reducing bacteria (SRB) from a geothermal power unit AB - Corrosion behavior of AISI 304 stainless steel induced by two strains of thermophilic sulfate reducing bacteria (SRB) was analyzed. Inoculated bacteria were isolated from the surface condenser's tubes of "Los Azufres". a geothermal electric field located in the State of Michoacan in Central Mexico. Anaerobic corrosion tests were carried out for two months in Czapek's medium at 50 C and 90 C inoculated with strains. The examination in scanning electron microscope (SEM) was accomplished to determine the type of corrosion, morphology, and preferential attacked zones. Measuring the corrosion potential and determining of anodic potentiodynamic polarization curves after two months of exposure in anaerobic conditions carried out an electrochemical study MH - Cuba MH - Mexico|Michoacan MH - Mexico|Morelos PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0947-5117 UR - ISI:000170924800005 SO - Materials and Corrosion-Werkstoffe und Korrosion 2001 ;52(8):614-618 4437 UI - 13730 AU - Torres DF AU - Romero GE AU - Combi JA AU - Benaglia P AU - Andernach H AU - Punsly B AD - Inst Argentino Radioastron, RA-1894 Buenos Aires, DF, ArgentinaUniv Guanajuato, Dept Astron, Guanajuato 36000, GTO, MexicoTorres, DF, Inst Argentino Radioastron, CC 5,Villa Elisa, RA-1894 Buenos Aires, DF, Argentina TI - A variability analysis of low-latitude unidentified gamma-ray sources AB - We present a study of 40 low-latitude unidentified 3EG gamma-ray sources which were found to be not positionally coincident with any known class of potential gamma-ray emitters in the Galaxy (Romero et al. 1999). We have performed a variability analysis which reveals that many of these 40 sources are variable. These sources have in addition, a steep mean value of the gamma-ray spectral index, < Gamma > = 2.41 +/- 0.2, which, combined with the high level of variability. seems to rule out a pulsar origin. The positional coincidences with uncatalogued candidates to supernova remnants were also studied. Only 7 sources in the sample are spatially coincident with these candidates, a result that is shown to be consistent with the expected level of pure chance association. A complementary search for weak radio counterparts was also conducted and the results are presented as an extensive table containing all significant point-like radio sources within the 40 EGRET fields. Mie argue that in order to produce the high variability, steep gamma-ray spectra, and absence of strong radio counterparts observed in some of the: gamma-ray sources of our sample. a new class of objects should be postulated, and we analyze a visible candidate MH - Argentina MH - Mexico|Guanajuato PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 49 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168611400015 L2 - gamma-rays : observations;gamma-rays : theory;ISM : supernova remnants;black holes physics;NEWMAN BLACK-HOLES; GHZ SKY SURVEY; GALACTIC PLANE; EGRET SOURCES; SUPERNOVA-REMNANTS; EMISSION; PULSARS; SEARCH SO - Astronomy & Astrophysics 2001 ;370(2):468-478 4438 UI - 13366 AU - Torres J AU - Camorlinga-Ponce M AU - Perez-Perez G AU - Madrazo-de la Garza A AU - Dehesa M AU - Gonzalez-Valencia G AU - Munoz O AD - Ctr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Unidad Invest Med Enfermedades Infecciosas, Mexico City, DF, MexicoCtr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Hosp Pediat, Dept Gastroenterol, Mexico City, DF, MexicoCtr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Hosp Especialidades, Dept Gastroenterol, Mexico City, DF, MexicoNYU, Div Infect Dis, New York, NY, USATorres, J, Prol Av Centenario 1707-39,Bosques Tarango, Mexico City 01580, DF, Mexico TI - Increasing multidrug resistance in Helicobacter pylori strains isolated from children and adults in Mexico AB - The susceptibilities to three antimicrobials of 195 Helicobacter pylori strains isolated from Mexican patients is reported; 80% of the strains were resistant to metronidazole, 24% were resistant to clarithromycin, and 18% presented a transient resistance to amoxicillin. Resistance to two or more antimicrobials increased significantly from 1995 to 1997 MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 22 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000169586400053 L2 - ANTIBIOTIC-RESISTANCE; PREVALENCE; CLARITHROMYCIN; METRONIDAZOLE; FURAZOLIDONE; INFECTION; THERAPY SO - Journal of Clinical Microbiology 2001 ;39(7):2677-2680 4439 UI - 13940 AU - Torres J AU - Camorlinga M AU - Perez-Perez G AU - Gonzalez G AU - Munoz O AD - IMSS, Unidad Invest Enfermedades Infecciosas Cordinac I, Mexico City, DF, MexicoNYU, Sch Med, Div Infect Dis, New York, NY 10012, USATorres, J, Prol Bosques Tarango, Mexico City 01580, DF, Mexico TI - Validation of the string test for the recovery of Helicobacter pylori from gastric secretions and correlation of its results with urea breath test results, serology, and gastric pH levels AB - The efficacy of the string culture test to isolate Helicobacter pylori from gastric secretions of 28 volunteers was studied. With the urea breath test (UBT) as the "gold standard," the string culture test showed a sensitivity of 75% and a specificity of 100%. The results of string culture did not correlate with the UBT results, with serum antibody levels, or,vith the pH levels of gastric secretions MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000167946500080 L2 - CULTURE; INFECTION; CHILDREN; ADULTS; CAGA SO - Journal of Clinical Microbiology 2001 ;39(4):1650-1651 4440 UI - 13386 AU - Torres M AU - Aguilar MB AU - Falcon A AU - Sanchez L AU - Radwan FFY AU - Burnett JW AU - Heimer-de la Cotera E AU - Arellano RO AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, MexicoUniv Maryland, Sch Med, Dept Dermatol, Baltimore, MD 21201, USAArellano, RO, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla, Queretaro 76001, Mexico TI - Electrophysiological and hemolytic activity elicited by the venom of the jellyfish Cassiopea xamachana AB - In this study, we determined hemolysis activity in human and sheep erythrocytes, and characterized the electrical responses in Xenopus oocyte membrane elicited by the venom of the jellyfrsh Cassiopea xamachana (Cx). The Cx venom produced hemolysis in both species, being more potent on human red cells. The electrophysiological study showed that the Cx venom elicited three different responses in the oocytes. One current was generated in all the oocytes tested and corresponded with a slow inward current (I-Cx) associated with an increase in membrane conductance. I-Cx was concentration-dependent and had a reversal potential of - 10.3 +/- 0.4 mV. Ionic substitution studies indicated that the conductive pathway was mainly permeable to cations and non-selective. The oocyte membrane resistance was completely recovered after washout of the venom, this suggested that the effect was due to generation of a specific membrane conductance as opposed to a possible non-specific membrane breakdown. A comparative study with three distinct native cationic channels present in the oocyte membrane [i.e. (1) hemi-gap-junction channels, (2) mechanosensitive channels, and (3) the ouabain-sensitive channel activated by palytoxin], showed that I-Cx might correspond to opening of mechanosensitive channels or to activation of an unknown cationic channel located in the oocyte membrane. The bioactive fraction eliciting I-Cx were peptides and was separated from two other peptidic hemolytic fractions by chromatography. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000169518600005 L2 - Cassiopea;Xenopus oocyte;ionic channels;electrophysiology;hemolysis;XENOPUS-LAEVIS OOCYTES; ACTIVATED ION CHANNELS; CHIRONEX-FLECKERI; PLASMA-MEMBRANE; CYTOLYTIC TOXIN; CALCIUM; PURIFICATION; CONDUCTANCE; PEPTIDES; BINDING SO - Toxicon 2001 ;39(9):1297-1307 4441 UI - 13693 AU - Torres M AU - de Espinosa FRM AU - Aragon JL AD - CSIC, Inst Fis Aplicada, Madrid 28006, SpainCSIC, Inst Acust, E-28006 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoTorres, M, CSIC, Inst Fis Aplicada, Serrano 144, Madrid 28006, Spain TI - Ultrasonic wedges for elastic wave bending and splitting without requiring a full band gap AB - We present a novel twinned-square periodic structure for ultrasonic wave bending and splitting that does not require the existence of a complete band gap and plays the role of an ultrasonic wedge. The device allows 45 degrees bending of waves and by adequately switching the twinned structure to an ultrasonic crystal 90 degrees bending is achieved. An extreme refraction law at the grain boundaries is experimentally observed MH - Mexico|Queretaro MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 34 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000168591000023 L2 - PHOTONIC CRYSTALS; MEDIA; COMPOSITES; EXISTENCE; CYLINDERS; GUIDES; STATES SO - Physical Review Letters 2001 ;86(19):4282-4285 4442 UI - 12260 AU - Torres N AU - Vargas C AU - Hernandez-Pando R AU - Orozco H AU - Hutson SM AU - Tovar AR AD - Inst Nacl Ciencias Med Nutr Salvador Zubirian, Dept Fisiol Nutr, Mexico City 14300, DF, MexicoInst Nacl Ciencias Med Nutr Salvador Zubirian, Dept Patol Expt, Mexico City 14300, DF, MexicoWake Forest Univ, Med Ctr, Dept Biochem, Winston Salem, NC 27103, USATovar, AR, Inst Nacl Ciencias Med Nutr Salvador Zubirian, Dept Fisiol Nutr, Mexico City 14300, DF, Mexico TI - Ontogeny and subcellular localization of rat liver mitochondrial branched chain amino-acid aminotransferase AB - Branched chain amino-acid aminotransferase (BCAT) activity is present in fetal liver but the developmental pattern of mitochondrial BCAT (BCATm) expression in rat liver has not been studied. The aim of this study was to determine the activity, protein and mRNA concentration of BCATm in fetal and postnatal rat liver, and to localize this enzyme at the cellular and subcellular levels at both developmental stages. Maximal BCAT activity and BCATm mRNA expression occurred at 17 days' gestation in fetal rat liver and then declined significantly immediately after birth. This pattern was observed only in liver; rat heart showed a different developmental pattern. Fetal liver showed intense immunostaining to BCATm in the nuclei and mitochondria of hepatic cells and blood cell precursors; in contrast, adult liver showed mild immunoreactivity located only in the mitochondria of hepatocytes. BCAT activity in isolated fetal liver nuclei was 0.64 mU.mg(-1) protein whereas it was undetectable in adult liver nuclei. By Western blot analysis the BCATm antibody recognized a 41-kDa protein in fetal liver nuclei, and proteins of 41 and 43 kDa in fetal liver supernatant. In adult rat liver supernatant, the BCATm antibody recognized only a 43-kDa protein; however, neither protein was detected in adult rat liver nuclei. The appearance of the 41-kDa protein was associated with the presence of the highly active form of BCATm. These results suggest the existence of active and inactive forms of BCAT in rat liver MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000172540800015 L2 - branched-chain amino acids;mitochondria;nuclei;ontogeny;PURIFICATION; METABOLISM; ISOENZYMES; EXPRESSION; HOMOLOGS; NUCLEUS; CLONING; TISSUES; PROTEIN; YEAST SO - European Journal of Biochemistry 2001 ;268(23):6132-6139 4443 UI - 14338 AU - Tovar AR AU - Becerril E AU - Hernandez-Pando R AU - Lopez G AU - Suryawan A AU - DeSantiago S AU - Hutson SM AU - Torres N AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Fisiol & Nutr, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Patol, Mexico City 14000, DF, MexicoWake Forest Univ, Bowman Gray Sch Med, Dept Biochem, Winston Salem, NC 27157, USATorres, N, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Fisiol & Nutr, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Localization and expression of BCAT during pregnancy and lactation in the rat mammary gland AB - During lactation, branched-chain aminotransferase (BCAT) gene expression increases in the mammary gland. To determine the cell type and whether this induction is present only during lactation, female rats were randomly assigned to one of three experimental groups: pregnancy, lactation, or postweaning. Mammary gland BCAT activity during the first days of pregnancy was similar to that of virgin rats, increasing significantly from day 16 to the last day of pregnancy. Maximal BCAT activity occurred on day 12 of lactation. During postweaning, BCAT activity decreased rapidly to values close to those observed in virgin rats. Analyses by Western and Northern blot revealed that changes in enzyme activity were accompanied by parallel changes in the amount of enzyme and its mRNA. Immunohistochemical studies of the mammary gland showed a progressive increase in mitochondrial BCAT (mBCAT)-specific staining of the epithelial acinar cells during lactation, reaching high levels by day 12. Immunoreactivity decreased rapidly after weaning. There was a significant correlation between total BCAT activity and milk production. These results indicate that the pattern of mBCAT gene expression follows lactogenesis stages I and II and is restricted to the milk-producing epithelial acinar cells. Furthermore, BCAT activity is associated with milk production in the mammary gland during lactation MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Endocrinology & Metabolism;Physiology U5 - J;Article AV - English IS - 0193-1849 UR - ISI:000166970100013 L2 - branched-chain amino acids;lactogenesis;BRANCHED-CHAIN AMINOTRANSFERASE; AMINO-ACID-METABOLISM; SKELETAL-MUSCLE; TRANSPORT SYSTEMS; TISSUE; MILK; GENE; MITOCHONDRIAL; LIVER; BETA-1,4-GALACTOSYLTRANSFERASE SO - American Journal of Physiology-Endocrinology and Metabolism 2001 ;280(3):E480-E488 4444 UI - 13317 AU - Tovar LLG AU - Connor PA AU - Belliard F AU - Torres-Martinez LM AU - Irvine JTS AD - Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, ScotlandUANL, Fac Ciencias Quim, Monterrey, NL, MexicoIrvine, JTS, Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland TI - Investigation of lead tin fluorides as possible negative electrodes for Li-ion batteries AB - Lead fin fluorides are well known fast ion conductors. In this study the electrochemical behaviour of materials as negative electrodes in lithium rechargeable batteries was investigated. The initial reduction with lithium occurs at much higher potentials for fluorides than oxides. This correlates well with the standard energies of formation of metals and Lithium oxide/fluoride on lithium insertion. Lead rich compounds present a greater degree of crystallinity than tin rich materials; and it is also observed that fluoride matrices exhibit greater crystallinity after cycling than their oxide counterparts. Tin oxide exhibits the best cycling performance and this seems to correlate with the low degree of crystallinity observed in this system. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - United Kingdom PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Electrochemistry;Energy & Fuels U5 - J;Article AV - English IS - 0378-7753 UR - ISI:000169836000061 L2 - lithium-ion battery;lithium-alloy anode;lead tin fluorides;LITHIUM; OXIDE SO - Journal of Power Sources 2001 ;97-8():258-261 4445 UI - 12215 AU - Tovmassian GH AU - Greiner J AU - Zharikov SV AU - Echevarria J AU - Kniazev A AD - UNAM, Inst Astron, Observ Astron Nacl, Ensenada, Baja California, MexicoAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoRAS, Special Astrophys Observ, Nizhnii Arkhyz 357147, RussiaTovmassian, GH, UNAM, Inst Astron, Observ Astron Nacl, Ensenada, Baja California, Mexico TI - The new cataclysmic variable RX J1554.2+2721 in the period gap AB - We report on the results of a spectroscopic and photometric study of a new cataclysmic variable, identified as optical counterpart of the X-ray source RX J1554.2+2721 detected by ROSAT. The spectroscopic observations of the relatively bright (similar to 16.(m)5) object show systematic radial velocity variations with a semiamplitude of similar to 140 km s(-1). Besides the clear presence of distinct low and high states there are periodic photometric light variations with an amplitude of about 0.15 mag in the R band. The orbital period is 2.(h)753 thus being within the period gap, at its upper border. The flux distribution in the spectrum of the object shows a substantial contribution of a M4 v secondary, and also bears clear signs of cyclotron emission. Thus, we classify the discovered object as a new member of the AM Her class of magnetic cataclysmic variables. This classification is further supported by the soft X-ray spectrum, the characteristic profiles of the emission lines, the tomography map and the shape of the orbital light curve. A simple fitting of the spectrum in the low and high states suggests a reduced mass transfer rate in RX J1554.2+2721 compared to similar objects outside the period gap MH - Germany MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000172620600015 L2 - stars : individual : RX J1554.2+2721;stars : novae, cataclysmic variables;stars : binaries : close;X-rays : stars;MAGNETIC WHITE-DWARFS; AM HERCULIS BINARIES; EVOLUTION; SPECTRUM; GALAXY SO - Astronomy & Astrophysics 2001 ;380(2):504-515 4446 UI - 12449 AU - Tovmassian GH AU - Szkody P AU - Greiner J AU - Zharikov SV AU - Zickgraf FJ AU - Serrano A AU - Krautter J AU - Thiering I AU - Neustroev V AD - UNAM, Inst Astron, OAN, Mexico City, DF, MexicoUniv Washington, Dept Astron, Seattle, WA 98195, USAAstrophys Inst Potsdam, D-14482 Potsdam, GermanyAstron Observ, Strasbourg, FranceInst Nacl Astrofis Opt & Elect, Puebla, MexicoLandessternwarte Konigstuhl, D-69117 Heidelberg, GermanyUdmurtia State Univ, Izhevsk, RussiaTovmassian, GH, POB 439027, San Diego, CA 92143, USA TI - The new AM Her system RX J0704.2+6203 - Northern twin of BL Hydri AB - We report here on the identification and study of the optical counterpart of the ROSAT source RX J0704.2+6203. Extensive spectral and photometric observation showed that the object belongs to the class of magnetic Cataclysmic Variables. We determined the orbital period of the system to be 97.(m)27 and estimated the strength of its magnetic field to be on the order of 20 MG. The system was observed in both high and low states, common for its class. Other parameters of the magnetic close binary system were estimated. The spectral and photometric behavior of the object is similar to that of the well studied polar BL Hyi MH - France MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Russia MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000172031800026 L2 - stars : novae, cataclysmic variables;stars : individual : RXJ0704.2+6203;stars : magnetic field;binaries : close;X-rays : stars;accretion;HERCULIS BINARIES; X-RAY; POLAR; TOMOGRAPHY SO - Astronomy & Astrophysics 2001 ;379(1):199-207 4447 UI - 13729 AU - Tovmassian GH AU - Stasinska G AU - Chavushyan VH AU - Zharikov SV AU - Gutierrez C AU - Prada F AD - UNAM, Inst Astron, OAN, Mexico City, DF, MexicoObserv Meudon, DAEC, F-92195 Meudon, FranceInst Nacl Astrofis Opt & Elect, Puebla, Pue, MexicoInst Astrofis Canarias, E-38200 La Laguna, Tenerife, SpainTovmassian, GH, UNAM, Inst Astron, OAN, Mexico City, DF, Mexico TI - SBS 1150+599A: An extremely oxygen-poor planetary nebula in the Galactic halo? AB - We report results of a spectrophotometric study of SBS 1150+599A and discuss the nature of this object based upon our data. Our study shows that SBS 1150+599A is most probably a planetary nebula located in the Galactic halo and not a cataclysmic variable as originally proposed by the authors of the Second Byurakan Survey from low resolution spectroscopy. We have further elaborated on the properties of SBS 1150+599A (now becoming PN G135.9+55.9) with tools used for planetary nebula analysis. Our photoionization models show that, in order to match the observational constraints, the oxygen abundance in the nebula is probably extremely low, around 1/500 solar, which is one order of magnitude lower than the most oxygen-poor planetary nebulae known so far. This finding has strong implications on our understanding of the formation of planetary nebulae and of the evolution of the Galactic halo MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168611400014 L2 - ISM : planetary nebulae : general;ISM : planetary nebulae : individual : SBS1150+599A;(PN G135.9+55.9);galaxies : halos;stars : binaries : symbiotic stars : cataclysmic variables;FINAL MASS RELATION; SYMBIOTIC STARS; CHEMICAL EVOLUTION; MAGELLANIC CLOUDS; GALAXIES; ABUNDANCE; SAMPLE; POPULATIONS; EMISSION; CATALOG SO - Astronomy and Astrophysics 2001 ;370(2):456-467 4448 UI - 12512 AU - Tovmassian HM AU - Tiersch H AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoSternwarte Konigsleiten, Munich, GermanyTovmassian, HM, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla 72000, Mexico TI - Shakhbazian compact groups: Poor clusters of galaxies AB - The environment of 105 elongated (b/a < 0.5) ShCGs is investigated for galaxies probably associated with them. Counts of galaxies are made in two reciprocally orthogonal stripes of 5' width and 20' length passing through the center of each elongated group. The orientation of the first stripe is determined by the orientation of elongation of the distribution of the principal members of groups. It is found that there is an excess of galaxies in the narrow stripes oriented along the elongation of the group. Such peculiar distribution of the loose group members allows us to conclude that they are gravitationally bound with the compact group, and rotate around the common gravitational center. It is shown that the new-found distant members compose, together with the principal members of the compact group, a gravitationally bound, and, most probably, virialized system. All members of the system rotate around the common gravitational center. It is concluded that ShCGs are the cores of poor clusters of galaxies. They must be not young, and are relatively stable configurations. The number of such groups could be very high in the Universe MH - Germany MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000171897200005 L2 - galaxies : general;abundances;clusters : general;LUMINOSITY FUNCTION; INFRARED-EMISSION; ELLIPTICITY; ORIENTATION; EVOLUTION; DENSE SO - Astronomy & Astrophysics 2001 ;378(3):740-747 4449 UI - 14504 AU - Trejo-Luna R AU - De la Vega LR AU - Rickards J AU - Falcony C AU - Jergel M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoSlovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaTrejo-Luna, R, Univ Nacl Autonoma Mexico, Inst Fis, Ap Postal 20-364, Mexico City 01000, DF, Mexico TI - 9 MeV au ion implantation into Ti and Ti-6Al-4V AB - Titanium and Ti-6Al-4V alloy samples were implanted with 9 MeV Au ions at room temperature with fluences up to 6.5 x 10(20) ions/m(2). The results were analyzed using Rutherford backscattering, X-ray diffraction, glancing angle X-ray diffraction, and SEM. The glancing angle diffraction patterns show peaks corresponding to a new phase in both materials, presenting an hcp structure with larger lattice parameters than the unimplanted material. This phase is formed mainly by structural damage produced by the beam, and not by the formation of compounds. Modifications of the grain size and microstrain were measured using the Williamson-Hall method. (C) 2001 Kluwer Academic Publishers MH - Mexico|Distrito Federal MH - Slovakia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000166450200030 L2 - ALPHA->OMEGA PHASE-TRANSFORMATION; TITANIUM SO - Journal of Materials Science 2001 ;36(2):503-510 4450 UI - 13216 AU - Trejo O AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Yague J AU - Jimenez S AU - de la Red G AU - Cervera R AU - Font J AU - Ingelmo M AD - Univ Barcelona, Hosp Clin Barcelona, Sch Med, Unitat Malalties Autoimmunes Sistem, E-08036 Barcelona, SpainUniv Barcelona, Hosp Clin Barcelona, Sch Med,Dept Immunol, Dept Med,Inst Invest Biomed August Pi & Sunyer, E-08036 Barcelona, SpainUniv Barcelona, Hosp Clin Barcelona, Sch Med, Dept Immunol, E-08036 Barcelona, SpainBenemerita Univ Autonoma Puebla, Rheumatol Unit, Sch Med, Puebla, MexicoFont, J, Univ Barcelona, Hosp Clin Barcelona, Sch Med, Unitat Malalties Autoimmunes Sistem, C Villarroel 170, E-08036 Barcelona, Spain TI - Cryoglobulinemia - Study of etiologic factors and clinical and immunologic features in 443 patients from a single center MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 61 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000170114800004 L2 - HEPATITIS-C VIRUS; PRIMARY SJOGRENS-SYNDROME; SYSTEMIC LUPUS-ERYTHEMATOSUS; CROSS-REACTIVE IDIOTYPES; TERM FOLLOW-UP; MIXED CRYOGLOBULINEMIA; II CRYOGLOBULINEMIA; REVISED CRITERIA; IMMUNE-COMPLEXES; INFECTION SO - Medicine 2001 ;80(4):252-262 4451 UI - 13567 AU - Trevino OG AU - Arseven OK AU - Ceballos CJ AU - Vives VI AU - Ramirez RC AU - Gomez VV AU - Medeiros-Neto G AU - Kopp P AD - Northwestern Univ, Div Endocrinol Metab & Mol Med, Chicago, IL 60611, USAInst Nacl Nutr Salvador Zubiran, Dept Nucl Med & Thyroid Clin, Mexico City 14000, DF, MexicoUniv Sao Paulo, Hosp Clin, Lab Mol Tiroide, Sao Paulo, BrazilKopp, P, Northwestern Univ, Div Endocrinol Metab & Mol Med, Tarry 15,303 Chicago Ave, Chicago, IL 60611 USA TI - Clinical and molecular analysis of three Mexican families with Pendred's syndrome AB - Background: The autosomal recessive Pendred's syndrome is defined by congenital sensorineural deafness, goiter, and impaired iodide organification. It is caused by mutations in the Pendred's syndrome (PDS) gene that encodes pendrin, a chloride/iodide transporter expressed in the thyroid, the inner ear, and the kidney. Objective: To perform a detailed clinical and molecular analysis of patients with Pendred's syndrome from four patients from three unrelated Mexican families. Methods: Thyroid function tests, perchlorate test, thyroid scintigraphy, audiometry, computer tomography and magnetic resonance imaging were performed in all affected individuals. Haplotype analyses were performed using microsatellite markers flanking the PDS locus, and the PDS gene was submitted to direct sequence analysis. Results: All patients presented with sensorineural deafness, Mondini malformations of the cochlea. an enlarged vestibular aqueduct, goiter, and a positive perchlorate test. Two patients were hypothyroid, two individuals were euthyroid. Sequence analysis revealed a complex homozygous deletion/insertion mutation at the end of exon 4 in the index patient of family 1 resulting in a premature stop codon at position 138. In family 2, the affected individuals were compound heterozygous for a splice acceptor mutation (IVS2 -1G > A) and a 1231G > C transversion substituting alanine 411 by proline (A411P). In family 3, the index patient was found to be homozygous for a transversion 412G > T in exon 4 replacing valine 138 by phenylalanine (V138F). Conclusions: All patients included in this study presented with the classic Pendred syndrome triad and molecular analysis revealed pendrin mutations as the underlying cause. The identification of three novel mutations, one of them of complex structure, expands the spectrum of mutations in the PDS gene and emphasizes that they display marked allelic heterogeneity MH - Brazil MH - USA MH - Mexico|Distrito Federal PB - BRISTOL: BIO SCIENTIFICA LTD RP - NOT IN FILE U3 - TC 9 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0804-4643 UR - ISI:000169052200004 L2 - SENSORINEURAL HEARING-LOSS; SYNDROME GENE PDS; VESTIBULAR AQUEDUCT; INNER-EAR; MUTATION; DEAFNESS; GOITER; VARIABILITY; PROTEIN; IODIDE SO - European Journal of Endocrinology 2001 ;144(6):585-593 4452 UI - 14421 AU - Tritlla J AU - Cardellach E AU - Sharp ZD AD - Univ Nacl Autonoma Mexico, Inst Geol, Dept Geoquim, Mexico City 04510, DF, MexicoUniv Autonoma Barcelona, Fac Ciencias, Dept Geol, Bellaterra 08193, SpainUniv New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131, USATritlla, J, Univ Nacl Autonoma Mexico, Inst Geol, Dept Geoquim, Circuito Invest Cientifica,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Origin of vein hydrothermal carbonates in triassic limestones of the Espadan Ranges (Iberian Chain, E Spain) AB - Dolomitization and Hg bearing veins in the lower Triassic limestones of the Espadan Ranges (Iberian Chain, E of Spain) are related to a hydrothermal event that occurred during the Santonian (late Cretaceous). Sr-87/Sr-86 ratios of unaltered regional dolostones range from 0.70829 to 0.70945, higher than those expected for Triassic diagenetic dolostones. Vein filling is constituted by a brown cloudy calcite (CC1), quartz, saddle-dolomite, mercurian tetrahedrite ("schwatzite") and a late blocky calcite (CC2). Low delta C-13 values of CC1 (-3.7 to -6.1 parts per thousand PDB) calcites resulted from the incorporation of light CO2 liberated from the destruction of organic matter within the vein system due to a temperature increase (up to 240 degreesC-270 degreesC), well above the gas generation window. Quartz has high delta O-18 values, ranging from 18.4 to 22.5 parts per thousand (SMOW). Saddle dolomites have low delta O-18 values (20.2 to 17.6 parts per thousand), with also low delta C-13 values, which is consistent with an effervescence of previously formed volatiles (CO2, N-2, H2S). Finally, the isotopically light carbon in late calcites (-6.3 to -10.6 parts per thousand) suggests a source related to the oxidation of organic matter whereas the heavy delta O-18 (23.5 to 25.4 parts per thousand) composition reflects O-18 buffering by the host carbonates. The small variations of Sr-87/Sr-86 ratios in hydrothermal calcites and dolomites (0.7082 to 0.7089) indicate that strontium isotope composition of the fluids were also buffered by the enclosing limestones. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000166678000006 L2 - stable isotopes;Sr isotopes;hydrothermal;dolomitization;VALLEY-TYPE DEPOSITS; THERMOCHEMICAL SULFATE REDUCTION; WESTERN CANADA; ORGANIC-MATTER; MISSISSIPPI; BASIN; DOLOMITIZATION; PRECIPITATION; DOLOMITE; BRINES SO - Chemical Geology 2001 ;172(3-4):291-305 4453 UI - 11371 AU - Trjapitzin VA AU - Ruiz-Cancino E AD - Univ Autonoma Tamaulipas, Ctr Invest, UAM Agron & Ciencias, Ciudad Victoria 87149, Tamaulipas, MexicoRussian Acad Sci, Inst Zool, St Petersburg 199034, RussiaTrjapitzin, VA, Univ Autonoma Tamaulipas, Ctr Invest, UAM Agron & Ciencias, Ciudad Victoria 87149, Tamaulipas, Mexico TI - Homalotylus cockerelli Timberlake (Hymenoptera : Encyrtidae) in Mexico MH - Mexico|Tamaulipas MH - Russia PB - DALLAS: SOUTHWESTERN ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0147-1724 UR - ISI:000175043500012 SO - Southwestern Entomologist 2001 ;26(4):377-378 4454 UI - 14016 AU - Trombetta M AU - Armaroli T AU - Alejandre AG AU - Gonzalez H AU - Solis JR AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyUniv Nacl Autonoma Mexico, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, MexicoBusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, GB Bonino,Ple JF Kennedy, I-16129 Genoa, Italy TI - Conversion and hydroconversion of hydrocarbons on zeolite-based catalysts: an FT-IR study AB - The interaction of HZSM5 and Mo-ZSM5 with benzene, naphthalene, toluene, ortho-xylene, pam-xylene, n-butane, isobutane, n-heptane, and methylcyclohexane, in the range 100-773 K has been investigated using FT-IR spectroscopy. Hydrogen bonded species with the internal bridging and the external terminal OHs has been detected. The reactivity at high temperature has also been studied. The access to the internal cavities and to the strongly acidic OHs is at least partly hindered in the case of Mo-ZSM5. The catalytic activity of ZSM5 was moderated by the addition of molybdenum, with lower cracking and higher liquid yields. (C) 2001 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000167824900028 L2 - HZSM-5;Mo-ZSM5;FT-IR spectroscopy;benzene;HZSM5 ZEOLITE SO - Catalysis Today 2001 ;65(2-4):285-292 4455 UI - 13243 AU - Trujano M AU - Iglesias G AU - Segales J AU - Palacios JM AD - Univ Autonoma Estado Mexico, Fac Med Vet & Zootecn, Mexico City, DF, MexicoUniv Autonoma Barcelona, Fac Vet, Dept Sanitat & Anat Anim, Barcelona, SpainSchering Plough SA, Mexico City, DF, MexicoTrujano, M, Univ Autonoma Estado Mexico, Fac Med Vet & Zootecn, Mexico City, DF, Mexico TI - PCV-2 from emaciated pigs in Mexico MH - Mexico|Distrito Federal MH - Spain PB - LONDON: BRITISH VETERINARY ASSOC RP - NOT IN FILE U3 - TC 7 U4 - Veterinary Sciences U5 - J;Letter AV - English IS - 0042-4900 UR - ISI:000169886100023 L2 - PORCINE CIRCOVIRUS TYPE-2 SO - Veterinary Record 2001 ;148(25):792-792 4456 UI - 14483 AU - Tulyaganov DU AU - Lopez-Cuevas J AU - Mendez-Nonell J AU - Ismatov AA AD - IPN, CINVESTAV, Unidad Saltillo, Mexico City 07738, DF, MexicoInst Chem Technol, Tashkent, UzbekistanTulyaganov, DU, IPN, CINVESTAV, Unidad Saltillo, Mexico City 07738, DF, Mexico TI - Whiteware bodies with low deformation characteristics MH - Mexico|Distrito Federal MH - Uzbekistan PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7812 UR - ISI:000166495700006 SO - American Ceramic Society Bulletin 2001 ;80(1):65-68 4457 UI - 13998 AU - Turbiner AV AU - Lopez JC AU - Flores-Riveros A AD - Univ Paris Sud, Phys Theor Lab, F-91405 Orsay, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoTurbiner, AV, Univ Paris Sud, Phys Theor Lab, F-91405 Orsay, France TI - The H-2(+) ion can dissociate in a strong magnetic field AB - In the framework of a variational method, the molecular ion H-2(+) in a magnetic field is studied. The optimal form of the vector potential corresponding to a given magnetic field (gauge fixing) is chosen variationally. It is shown that for any magnetic field strength, as well as for any orientation of the molecular axis, the system (ppe) possesses a minimum in the potential energy. The stable configuration always corresponds to the elongation along the magnetic line. However, for magnetic fields B greater than or similar to 2 x 10(11) G and some orientations, the H-2(+) ion becomes unstable, decaying into the H atom +p. (C) 2001 MAIK "Nauka/Interperiodica" MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0021-3640 UR - ISI:000167914500005 L2 - HYDROGEN MOLECULAR ION; NEUTRON STAR; SURFACE SO - Jetp Letters 2001 ;73(4):176-179 4458 UI - 12335 AU - Turner BL AU - Villar SC AU - Foster D AU - Geoghegan J AU - Keys E AU - Klepeis P AU - Lawrence D AU - Mendoza PM AU - Manson S AU - Ogneva-Himmelberger Y AU - Plotkin AB AU - Salicrup DP AU - Chowdhury RR AU - Savitsky B AU - Schneider L AU - Schmook B AU - Vance C AD - Clark Univ, Grad Sch Geog, Worcester, MA 01610, USAClark Univ, George Perkins Marsh Inst, Worcester, MA 01610, USAEl Colgio Frontera Sur Chetumal, Carretera Chetumal Bacalar, Chetumai 77000, Quintana Roo, MexicoHarvard Univ, Harvard Forest, Petersham, MA 01366, USAClark Univ, Dept Econ, Worcester, MA 01610, USAColgate Univ, Dept Geog, Hamilton, NY 13346, USAUniv Virginia, Dept Environm Sci, Charlottesville, VA 22903, USAUniv Nacl Autonoma Mexico, Dept Ecol Recursos Nat, Morelia 58190, Michoacan, MexicoFlorida State Univ, Dept Geog, Tallahassee, FL 32306, USAUS EPA, Washington, DC 20460, USATurner, BL, Clark Univ, Grad Sch Geog, Worcester, MA 01610, USA TI - Deforestation in the southern Yucatan peninsular region: an integrative approach AB - The tensions between development and preservation of tropical forests heighten the need for integrated assessments of deforestation processes and for models that address the fine-tuned location of change. As Mexico's last tropical forest frontier, the southern Yucatan peninsular region witnesses these tensions, giving rise to a "hot spot" of tropical deforestation. These forests register the imprint of ancient Maya uses and selective logging in the recent past, but significant modern conversion of them for agriculture began in the 1960s. Subsequently, as much as 10% of the region's forests have been disturbed anthropogenically. The precise rates of conversion and length of successional growth in both upland and wetland forests are tied to policy and political economic conditions. Pressures on upland forests are exacerbated by the development of infrastructure for El Mundo Maya, an archaeological and ecological activity predicated on forest maintenance, and by increased subsistence and market cultivation, including lands on the edge of Mexico's largest tropical forest biosphere reserve. In this complex setting, the southern Yucatan peninsular region project seeks to unite research in the ecological, social, and remote sensing sciences to provide a firm understanding of the dynamics of deforestation and to work towards spatially explicit assessments and models that can be used to monitor and project forest change under different assumptions. (C) 2001 Elsevier Science B.V All rights reserved MH - Mexico|Michoacan MH - Mexico|Quintana Roo MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 43 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000172287600002 L2 - tropical deforestation;land change;modeling;Mexico;Yucatan;LAND-COVER-CHANGE; CARBON EMISSIONS; BRAZILIAN AMAZON; FOREST; SATELLITE; MODELS; MEXICO SO - Forest Ecology and Management 2001 ;154(3):353-370 4459 UI - 12289 AU - Twohy CH AU - Hudson JG AU - Yum SS AU - Anderson JR AU - Durlak SK AU - Baumgardner D AD - Oregon State Univ, Dept Ocean & Atmospher Sci, Corvallis, OR 97331, USAUniv Nevada, Desert Res Inst, Div Atmospher Sci, Reno, NV 89512, USAArizona State Univ, Dept Mech & Aerosp Engn, Tempe, AZ 85287, USANatl Ctr Atmospher Res, Boulder, CO 80307, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoTwohy, CH, Oregon State Univ, Dept Ocean & Atmospher Sci, Corvallis, OR 97331 USA TI - Characteristics of cloud-nucleating aerosols in the Indian Ocean region AB - During the Indian Ocean Experiment (INDOEX), cloud droplets were collected and evaporated using a counterflow virtual impactor (CVI). The nonvolatile residual particles were then analyzed by various instruments. Physical and chemical properties of the cloud droplets and their residual nuclei were compared with properties of the below-cloud aerosol to evaluate which aerosol particles act as cloud nuclei in different environments, and their effects on cloud microphysics. Four cases, ranging from clean Southern Hemispheric clouds to heavily polluted clouds near India, were analyzed. For the cleaner clouds, droplet concentrations were a much higher fraction of the available particle concentrations than for polluted clouds, but entrainment apparently acted to reduce droplet number concentrations in both regimes. For clean clouds the median critical supersaturation and size of the ambient particles and droplet residual particles were similar. In polluted clouds there were stronger differences between ambient and droplet residual distributions, and particles with lower critical supersaturations were favored as nuclei. Simple model calculations were used to show that polluted clouds are expected to achieve lower water supersaturations than clean clouds; thus only particles with relatively low critical supersaturations are likely to affect clouds in polluted regions. Soluble, fractions for the ambient aerosol inferred from the size and cloud condensation nuclei measurements were in general agreement with another study in the region. Droplet residual particles did not necessarily have higher soluble fractions than the ambient aerosol, but did tend to have higher total amounts of soluble material per particle, particularly in the polluted cases MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000172355800047 L2 - CONDENSATION NUCLEI SPECTRA; COUNTERFLOW VIRTUAL IMPACTOR; SEA-SALT; SOUTHERN-OCEAN; PARTICLES; DROPLETS; MICROPHYSICS; CCN; SPECTROMETER; EQUATION SO - Journal of Geophysical Research-Atmospheres 2001 ;106(D22):28699-28710 4460 UI - 12732 AU - Tzivoni J AU - Almagor Y AU - Meerkin D AU - Klutstein MW AU - Rosenmann D AU - Balkin JA AU - Gaspar J AD - Shaare Zedek Med Ctr, Dept Cardiol, Jerusalem, IsraelNatl Inst Cardiol, Mexico City, DF, Mexico TI - Treatment of degenerative saphenous vein graft lesions with bovine pericardium covered stents MH - Israel MH - Mexico|Distrito Federal PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000170988302528 SO - European Heart Journal 2001 ;22():661-661 4461 UI - 13147 AU - Uc VH AU - Garcia-Cruz I AU - Grand A AU - Vivier-Bunge A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoCEA, Dept Rech Fondamentale Matiere Condensee, Grenoble, France TI - Theoretical prediction of EPR coupling constants for the determination of the selectivity in the OH addition to toluene MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824703281 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U487-U487 4462 UI - 13417 AU - Uc VH AU - Garcia-Cruz I AU - Grand A AU - Vivier-Bunge A AD - Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCEA Grenoble, Dept Rech Fondamentale Mat Condensee, Grenoble 9, FranceVivier-Bunge, A, Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, Mexico TI - Theoretical prediction of EPR coupling constants for the determination of the selectivity in the OH addition to toluene AB - High-level theoretical methods based on density functional and Hartree-Fock-Moller- Plesset theories have been employed to study the selectivity of the OH radical attack on toluene and to predict expected hyperfine coupling constants of the isomeric addition adducts. In recent work, we have found that the adduct with OH. added to the methyl-substituted carbon atom (ipso addition) of the ring may be especially stable both in toluene and in the xylenes. However, since this kind of adduct does not form a phenol, it is not directly identified in the products. The calculations indicate that quite different values should be observed for the EPR signals of the methyl hydrogen atoms of the four isomers, suggesting that electron paramagnetic resonance measurements could provide decisive information on the selectivity of the OH. addition to toluene. The calculated values of the hyperfine coupling constants are compared with the experimental values reported by Jolibois et al. for thymine MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000169534600034 L2 - ATMOSPHERIC OXIDATION; RADICAL-ADDITION; ORTHO-XYLENE; PHOTOOXIDATIONS; MECHANISM; ENERGIES; ETHENES SO - Journal of Physical Chemistry A 2001 ;105(25):6226-6231 4463 UI - 12685 AU - Ueda Y AU - Yamaoka K AU - Grove JE AU - McCollough M AU - Durouchoux P AU - Rodriguez J AU - Mirabel F AU - Swank J AU - Feroci M AU - Casella P AU - Castro-Tirado AJ AU - Sanchez-Fernandez C AU - Chaty S AU - Castaneda H AU - Kohno K AU - Dhawan V AU - Trushkin SA AU - Ebisawa K AU - Kotani T AU - Inoue H AD - Inst Space & Astronaut Sci, Sagamihara, Kanagawa 229, JapanUSN, Res Lab, Washington, DC 20375, USANASA, MSFC, Huntsville, AL, USAServ Astrophys, Saclay, FranceConsejo Nacl Invest Cient & Tecn, IAFE, RA-1033 Buenos Aires, DF, ArgentinaNASA, GSFC, Greenbelt, MD, USACNR, Ist Astrofis Spaziale, I-00185 Rome, ItalyCSIC, IAA, Granada, SpainINTA, LAEFF, Madrid, SpainOpen Univ, Dept Phys & Astron, Milton Keynes, Bucks, EnglandObserv Astron Nacl Mexico, Mexico City, DF, MexicoNAO, Nobeyama Radio Observ, Nagano, JapanNRAO, Charlottesville, VA, USAUeda, Y, Inst Space & Astronaut Sci, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan TI - The 2000 April multiwavelength campaign of GRS 1915+105 AB - We report results from multiwavelength observations of the microquasar GRS 1915+105 performed during the 2000 April campaign. This is one of the biggest campaigns ever made for this source covering the broad band from radio to gamma -rays. Multiwavelength light curves compiled from all the data reduced up to date and broad band spectra obtained with ASCA and RXTE are presented MH - Argentina MH - United Kingdom MH - France MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Spain MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000171500900009 L2 - GRS 1915+105;multiwavelength observations;GRS-1915+105 SO - Astrophysics and Space Science 2001 ;276():25-28 4464 UI - 13241 AU - Uriz MJ AU - Carballo JL AD - CSIC, Ctr Adv Studies, Dept Aquat Ecol, Blanes 17300, Gerona, SpainUNAM, Inst Ciencias Mar & Limnol, Mazatlan 82000, MexicoUriz, MJ, CSIC, Ctr Adv Studies, Dept Aquat Ecol, Cami Sta Barbara,S-N, Blanes 17300, Gerona, Spain TI - Phylogenetic relationships of sponges with placochelae or related spicules (Poecilosclerida, Guitarridae) with a systematic revision AB - All the currently known sponge species bearing placochelae or placochelae-like spicules (i.e. belonging to the genera Guitarra, Coelodischela, Tetrapocillon, Euchelipluma, and Hoplakithara) have been reviewed and their relationships delineated by cladistic analysis. A matrix of 18 taxa and 14 characters is included. The species Isodictya palmata and Esperiopsis fucorum were used as an outgroup, because they shared either monactines or diactines and smooth palmate isochelae with different members of the ingroup. Cladistic analysis using PAUP produced two equally parsimonious trees of 33 steps (CI=0.758). Strict, Semistrict and Majority Rule consensus trees displayed the same topology. The phylogeny of the trees was not totally resolved. The bootstrap 50% majority-rule consensus tree supported, to a greater or lesser extent, the previously detected monophyletic groups. A common linkage for the ingroup was found in 72% of instances. The genus Euchelipluma appeared as monophyletic in 75% of instances while the group which included the genus Guitarra did so in 66%. The monophyly of the species with sigmoid microscleres and without spiny isochelae (G. isabellae/sigmatifera/antarctica/dendyi and C. diatomorpha/massa) received 56% support as did the group of species with spiny isochelae, whereas monophyly of the group laplani/bipocillifera received 64% support and the genus Tetrapocillon 56%. According to our cladistic analysis, all the species bearing placochelae or derived forms should be allocated to Guitarridae. Within this family, the genus Euchelipluma appeared as monophyletic while Guitarra was paraphyletic. The single species of the genus Hoplakithara clearly belongs to the Guitarra (sigmatifera) group and thus becomes synonymous with Guitarra. G. solorzanoi is considered here a synonymy of C. laplani. A diagnosis for the 10 valid species of Guitarra known to date as well as for the two species of Coelodischela and the two of Euchelipluma is given. (C) 2001 The Linnean Society of London MH - Mexico|Sinaloa MH - Spain PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0024-4082 UR - ISI:000169978300002 L2 - biplacochelae;tetraplacochelae;Guitarra;Coelodischela;Tetrapocillon;Euchelipluma;Hoplakithara;systematics;cladistic analysis;phylogeny;PORIFERA; CONFIDENCE SO - Zoological Journal of the Linnean Society 2001 ;132(4):411-428 4465 UI - 11525 AU - va-Valdivia LM AU - Goguitchaichvili A AU - Cobiella-Reguera J AU - Urrutia-Fucugauchi J AU - Fundora-Granda M AU - Grajales-Nishimura JM AU - Rosales C AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Pinar Rio, Dept Geol, Pinar Del Rio, CubaInst Mexicano Petr, Mexico City, DF, MexicoAlva-Valdivia, LM, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Palaeomagnetism of the Guaniguanico Cordillera, western Cuba: a pilot study AB - A palaeo- and rock-magnetic study was carried out on the Jurassic-Cretaceous Guaniguanico Cordillera (15 sites, 112 oriented cores) in order to define a preliminary magnetos tratigraphy and to obtain some constraints on the tectonic evolution of western Cuba. Rock-magnetic experiments indicate Ti-poor titanomagnetites as principal remanence carriers. Two magnetic phases seem to be present in a few samples: some spinels, which saturate at moderate magnetic fields and goethite, with higher coercivity. The presence of hematite (or mixture of spinels and hematite) is apparent in two units. In most cases the characteristic palaeodirections could be determined above 300degreesC. Eleven sites yield normal magnetic polarity and four reverse. The polarity zones can be tentatively correlated to chrons CM29-C24 in the reference geomagnetic polarity time scale. The mean palaeodirection calculated from all sites is Dm=335.7degrees, Im=43.1degrees, k=11, alpha(95)=12.3 and N=15. The corresponding palaeopole is Plat=66.4degrees, Plong=205.8degrees, K=13, and A(95),=11.1. This pole is not significantly different from North American Jurassic-Cretaceous poles. This suggests that no major latitudinal displacements and deformation have occurred since the Jurassic, in contrast to some previously proposed tectonic models. (C) 2001 Academic Press MH - Cuba MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0195-6671 UR - ISI:000174643700004 L2 - palaeomagnetism;magnetostratigraphy;Cretaceous;Jurassic;Cuba;Guaniguanico Cordillera;REMANENT MAGNETIZATION; NORTH-AMERICA; HISTORY; TITANOMAGNETITES; TEMPERATURE; OXIDATION; PLATE SO - Cretaceous Research 2001 ;22(6):705-718 4466 UI - 14011 AU - va-Valdivia LM AU - Goguitchaichvili A AU - Urrutia-Fucugauchi J AU - Caballero-Miranda C AU - Vivallo W AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoServ Nacl Geol & Mineria, Santiago, ChileAlva-Valdivia, LM, Univ Nacl Autonoma Mexico, Inst Geofis, Del Coyoacan, Mexico City 04510, DF, Mexico TI - Rock-magnetism and ore microscopy of the magnetite-apatite ore deposit from Cerro de Mercado, Mexico AB - Rock-magnetic and microscopic studies of the iron ores and associated igneous rocks in the Cerro de Mercado, Mexico, were carried out to determine the magnetic mineralogy and origin of natural remanent magnetization (NRM), related to the thermo-chemical processes due to hydrothermalism. Chemical remanent magnetization (CRM) seems to be present in most of investigated ore and wall rock samples, replacing completely or partially an original thermoremanent magnetization (TRM). Magnetite (or Ti-poor titanomagnetite) and hematite are commonly found in the ores. Although hematite may carry a stable CRM, no secondary components are detected above 580 degrees, which probably attests that oxidation occurred soon enough after the extrusion and cooling of the ore-bearing magma. NRM polarities for most of the studied units are reverse. There is some scatter in the cleaned remanence directions of the ores, which may result from physical movement of the ores during faulting or mining, or from perturbation of the ambient field during remanence acquisition by inhomogeneous internal fields within these strongly magnetic ore deposits. The microscopy study under reflected light shows that the magnetic carriers are mainly titanomagnetite, with significant amounts of ilmenite-hematite minerals, and goethite-limonite resulting from alteration processes. Magmatic titanomagnetites, which are found in igneous rocks, show trellis, sandwich, and composite textures, which are compatible with high temperature (deuteric) oxy-exsolution processes. Hydrothermal alteration in ore deposits is mainly indicated by martitization in oxide minerals. Grain sizes range from a few microns to >100 mum, and possible magnetic state from single to multidomain, in agreement with hysteresis measurements. Thermal spectra, continuous susceptibility measurements, and IRM (isothermal remanent magnetization) acquisition suggest a predominance of spinels as magnetic carriers, most probably titanomagnetites with low-Ti content. For quantitative modeling of the aeromagnetic anomalies, we used data on bulk susceptibility and natural remanent intensity for quantifying the relative contributions of induced and remanent magnetization components and allow a better control of the geometry of source bodies. The position and geometry of this magnetic source are shown as an ENE striking tabular body, steeply inclined (75 degrees) to the south MH - Chile MH - Mexico|Distrito Federal PB - TOKYO: TERRA SCIENTIFIC PUBL CO RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1343-8832 UR - ISI:000167774700004 L2 - IRON-ORES; KIRUNA TYPE; TITANOMAGNETITES; PALEOMAGNETISM; MICHOACAN; DURANGO; CHILE SO - Earth Planets and Space 2001 ;53(3):181-192 4467 UI - 12678 AU - Vachoud L AU - Chen TH AU - Payne GF AU - Vazquez-Duhalt R AD - Univ Maryland, Ctr Agr Biotechnol, College Pk, MD 20742, USAUniv Maryland Baltimore Cty, Dept Chem & Biochem Engn, Baltimore, MD 21250, USAUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoPayne, GF, Univ Maryland, Ctr Agr Biotechnol, 5115 Plant Sci Bldg, College Pk, MD 20742 USA TI - Peroxidase catalyzed grafting of gallate esters onto the polysaccharide chitosan AB - Peroxidases are believed to play a role in various natural polymerization processes and it may be possible to exploit peroxidases for environmentally-friendly industrial polymer processing. We examined the potential for using horseradish peroxidase to graft the phenolic substrate dodecyl gallate (DDG) onto the polysaccharide chitosan. Several analytical approaches were used to provide evidence that DDG was grafted onto chitosan. Compared to unmodified chitosan, DDG-modified chitosan had significantly increased absorbance in the UV-visible region, and in the C-H and carbonyl-stretching regions of the IR spectra. Also, the H-1 NMR spectrum of a soluble fraction of DDG-chitosan had broad peaks near 1.2 ppm consistent with the grafting of DDG onto the polymer. Additional evidence for DDG grafting was obtained in two studies in which the DDG-modified chitosan was subjected to nitrous acid hydrolysis. First, a highly modified and insoluble DDG-chitosan was suspended in 10% acetic acid. After partial hydrolysis, peaks associated with the sugar and dodecyl gallate moieties were observed to appear in the solution phase H-1 NMR spectrum. Finally, the DDG-modified chitosan was hydrolyzed and fractions were separated by HPLC. One fraction showing both UV absorbance (characteristic of the phenolic) and carbohydrate reactivity to anthrone was purified by two chromatographic steps. This fraction was analyzed by both FAB-MS and electrospray-MS, and observed to have a molecular weight of 371 Da. These results provide evidence that peroxidases can be used to graft phenolic moieties onto the polysaccharide chitosan. (C) 2001 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Morelos PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-0229 UR - ISI:000171480100009 L2 - chitosan;gallate;hydrophobic modification;peroxidase;polymer grafting;OXIDATIVE CROSS-LINKING; HORSERADISH-PEROXIDASE; DERIVATIVES; LIGNIN; ACID; POLYMERIZATION; POLYMERS; SYSTEMS; DAMAGE SO - Enzyme and Microbial Technology 2001 ;29(6-7):380-385 4468 UI - 12486 AU - Vaillant L AU - Vigil O AU - Contreras-Puente G AU - Mejia-Garcia C AD - Univ La Habana, Fac Fis, IMRE, Havana 43100, CubaInst Politecn Nacl, Escuela Super Fis & Matemat, Edif 9, UP ALM, Mexico City 07738, DF, MexicoVaillant, L, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edif 9, UP ALM, Mexico City 07738, DF, Mexico TI - Optical and morphological characterization of (ZnO)(x)(CdO)(1-x) thin films AB - The optical and morphological properties of (ZnO)(x)(CdO)(1-x) semiconductor thin films with x composition in the range 0 square x square 0.5 are studied by the photoluminescence optical technique (PL), and the Scanning Electron Microscopy (SEM). The evolution of the band associated with oxygen content in the films is observed and described as a function of the film composition and the thermal annealing. The surface morphology is presented, where two different binary semiconducting species can be discerned in proportions dependent on the films composition MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000171910900023 L2 - SPRAY-PYROLYSIS; OXIDE SO - Modern Physics Letters B 2001 ;15(17-19):663-666 4469 UI - 14453 AU - Valcarce A AU - Garcilazo H AU - Mota RD AU - Fernandez F AD - Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoValcarce, A, Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, Spain TI - Delta Delta and Delta Delta Delta bound states AB - We calculate the two- and three-body spectra of deltas using a chiral quark cluster model and a meson-exchange model for the Delta Delta interaction. The ordering of the states is pretty much,model independent. Both models predict the existence of four aa bound states that couple to the NN system. Three of these states. can be identified with known NN states. The fourth state corresponds to a new NN resonance: with isospin 0, spin 3 and positive parity. A possible signal of this resonance appears in recent analyses of NN data MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Letter AV - English IS - 0954-3899 UR - ISI:000166605300001 L2 - P PHASE-SHIFTS; DIPROTON RESONANCES; MASS RANGE; DIBARYON; SYSTEMS SO - Journal of Physics G-Nuclear and Particle Physics 2001 ;27(1):L1-L7 4470 UI - 11858 AU - Valdes-Martinez J AU - Del Rio-Ramirez M AU - Hernandez-Ortega S AU - Aakeroy CB AU - Helfrich B AD - Univ Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoKansas State Univ, Dept Chem, Manhattan, KS 66506, USAValdes-Martinez, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Coyoacan 04510, DF, Mexico TI - Demonstrating the importance of hydrogen bonds through the absence of hydrogen bonds AB - Only recently have noncovalent interactions (notably hydrogen bonds) been used in deliberate strategies for connecting coordination complexes into extended networks. The significance of such intermolecular forces is further demonstrated in this structural study of four different 1,8-bis(dimethylamino)naphthalenium, [HDMAN](+), halo-metalates. The cation is unable to engage in any strong hydrogen-bond interactions and the resulting structures do not display any repeating topologies or motifs. This is in stark contrast with previous work on halo-metalates with cations capable of forming directional hydrogen bonds, e.g., 4,4-bipyridinium(2+); those structures contain charge-assisted MX...HN+ interactions between anions and cations resulting in well-defined 1-D and 2-D motifs. The [HDMAN](+) structures presented here, however, are determined by close-packing principles; no repeating motifs are observed, which emphasizes that hydrogen bonding is an effective tool for directed assembly of substantial coordination complexes MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary;Crystallography;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1528-7483 UR - ISI:000173707500010 L2 - CRYSTAL; ARCHITECTURES; SOLIDS; CHAINS; CL SO - Crystal Growth & Design 2001 ;1(6):485-489 4471 UI - 12694 AU - Valdes-Martinez J AU - Toscano RA AU - Salazar-Mendoza D AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoValdes-Martinez, J, Kansas State Univ, Dept Chem, Manhattan, KS 66503 USA TI - Bis(2,2 ': 6 ',2 ''-terpyridine)copper(II) diperchlorate hemihydrate MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 1 U4 - Crystallography U5 - J;Article AV - English IS - 1600-5368 UR - ISI:000171450100089 L2 - COMPLEXES SO - Acta Crystallographica Section E-Structure Reports Online 2001 ;57():M331-M332 4472 UI - 12748 AU - Valdes-Martinez J AU - strum-Acevedo JH AU - Toscano RA AU - Espinosa-Perez G AU - Helfrich BA AU - West DX AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoIllinois State Univ, Dept Chem, Normal, IL 61790, USAKansas State Univ, Dept Chem, Manhattan, KS 66503, USAValdes-Martinez, J, Kansas State Univ, Dept Chem, Manhattan, KS 66503 USA TI - Bis(2-pyridiniomethyleneaminoguanidinium) trans-tetraaquadichloronickel(II) dichloride tetrahydrate AB - In the title compound, (C7H11N4)(2)[Ni(H2O)(4)Cl-2]Cl-2. 4H(2)O, the Ni complex occupies a special position on the twofold axis; both cation and anions, as well as the water molecules, are in general positions. The multiple crystallographically independent hydrogen bonds form an infinite three-dimensional network in the crystal MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 1600-5368 UR - ISI:000171366800007 SO - Acta Crystallographica Section E-Structure Reports Online 2001 ;57():m137-m139 4473 UI - 12350 AU - Valdes-Ramos R AU - Solomons NW AU - Anderson AS AU - Mendoza I AU - Garces MA AU - Benincasa L AD - Inst Nacl Perinatol, Subdirecc Invest Salud Publ, Mexico City, DF, MexicoCtr Studies Sensory Impairment Aging & Metab, Guatemala City, GuatemalaCtr Appl Nutr Res, Dundee, ScotlandUniv Rafael Landivar, Fac Ciencias Salud, Guatemala City, GuatemalaValdes-Ramos, R, Inst Nacl Perinatol, Subdirecc Invest Salud Publ, Montes Urales 800,2 Piso,Torre Invest, Mexico City, DF, Mexico TI - Can the degree of concordance with recommendations for a cancer prevention diet and lifestyle be assessed from existing survey information data? AB - Background: The World Cancer Research Fund convened an expert committee who analyzed the literature related to the causation of human cancers. Recommendations for preventing cancer through behavioral practices were formatted into a 14-point guideline. Objective: We parsed the cancer prevention guidelines to determine to what extent relevant information on individual behavior could be assessed from conventional food-frequency questionnaires, which are being used in surveys conducted in developing countries. Design: We examined a convenience sample of archival forms completed during 2 independent studies (a case-control and a field study) that used an adapted Willett food-frequency questionnaire that was translated into Spanish for use in Guatemala. Results: All dietary related guidelines, except for salt, were evaluated by both questionnaires. Physical activity, food handling, and food preparation were not addressed by either of the questionnaires, although body mass index and dietary supplements were addressed in the case-control study and field-study questionnaires, respectively. Conclusions: Although concordance with some of the cancer prevention goals and guidelines can be evaluated from the existing questionnaires, adjustments and additions must be made with respect to salt and supplement use, physical activity, and food handling. Actual weight and height measurements are also needed, particularly in low-income populations MH - Guatemala MH - Mexico|Distrito Federal MH - United Kingdom PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 1 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000172328600022 L2 - diet;nutritional epidemiology;food-frequency questionnaires;FFQs;cancer;Guatemala;guidelines;NUTRITION TRANSITION SO - American Journal of Clinical Nutrition 2001 ;74(6):848-851 4474 UI - 13845 AU - Valdes-Ramos R AU - Cervantes I AU - Mendoza I AU - Solomons NW AU - Anderson AS AD - Inst Nacl Perinatol, Mexico City 11000, DF, MexicoCtr Studies Sensory Impairment Aging & Metab, Guatemala City, GuatemalaUniv Dundee, Dundee DD1 4HN, Scotland TI - The dependency of nutrient intake estimates from food-frequency questionnaire instruments on food composition tables MH - Guatemala MH - Mexico|Distrito Federal MH - United Kingdom PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167454200122 SO - Faseb Journal 2001 ;15(5):A734-A734 4475 UI - 14085 AU - Valdes-Ramos R AU - Mendoza I AU - Solomons NW AD - Inst Nacl Perinatol, Dept Invest Nutr, Mexico City 11000, DF, MexicoCtr Studies Sensory Impairment Aging & Metab, Guatemala City, GuatemalaValdes-Ramos, R, Inst Nacl Perinatol, Dept Invest Nutr, Montes Urales 800,2 Piso,Torre Invest, Mexico City 11000, DF, Mexico TI - Concordance of dietary intake with the "Dietary Guidelines for Americans" among adults in rural "Santa Rosa" province, Guatemala AB - Two-hundred sixty-nine food frequency questionnaires of a rural township and its hamlets in Santa Rosa, Guatemala were used to assess spontaneous concordance of eating patterns and lifestyle with the 1995 Dietary Guidelines for Americans. The instrument allowed for full or partial evaluation of five of the seven Guidelines. We found concordance in terms of grains, vegetables and fruits; low consumption of the milk group, and excess of the meat and beans group, determined by high consumption of beans. Their diet did not show variety. In terms of consumption of "plenty" of grains, vegetables and fruits, our population consumed more than 55% of their energy from these items. With respect to fat, mean consumption was 24.5 +/- 14.9% energy. Moderation in sugar is suggested, when analyzing sugar portions, our population consumed more than 10% from this food group. Santa Rosan's had a very low reported alcohol consumption, less than one portion per year, on average, indicating that this recommendation is totally fulfilled. Weight maintenance, physical activity, and sodium/salt consumption, were not evaluated, as the instrument does not include questions about these items. For health authorities in Latin America, the message might be that maintenance and conservation of traditional dietary patterns is the strategy to adopt for the control of noncommunicable diseases through the epidemiological transition phase of development, while recommending improvement in those areas that are still deficient. For US residents, the adoption of meal patterns based on traditional cuisines may be a feasible way to enhance compliance with the Guidelines. (C) 2001 Elsevier Science Inc. All rights reserved MH - Guatemala MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0271-5317 UR - ISI:000167528700009 L2 - diet;total energy intake;cancer prevention;chronic disease epidemiology;nutritional epidemiology;dietary guidelines;Guatemala SO - Nutrition Research 2001 ;21(1-2):81-91 4476 UI - 14246 AU - Valdez-Gutierrez M AU - Rosado M AU - Georgiev L AU - Borissova J AU - Kurtev R AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoBulgarian Acad Sci, Inst Astron, BU-1784 Sofia, BulgariaIsaac Newton Inst Chile, Bulgarian Branch, BU-1784 Sofia, BulgariaUniv Sofia, Dept Astron, Sofia 1164, BulgariaIsaac Newton Inst Chile, Bulgarian Branch, Sofia 1164, BulgariaValdez-Gutierrez, M, Inst Nacl Astrofis Opt & Elect, Calle Luis Enrique Erro 1, Puebla 72840, Mexico TI - Kinematics of the ionized gas in the Local Group irregular galaxy IC 1613 AB - We present H alpha and [SII] observations for the Local Group irregular galaxy IC 1613 using the PUMA scanning Fabry-Perot interferometer. Our goal is to analyze the kinematics of the ionized gas in the complex sample of superbubbles located in the whole extension of our field (10'), which includes most of the optical emission of this galaxy, and to study the inter-relationship between young stellar associations and nebulae based on a previous study that we have made on the stellar associations of the central region of this galaxy. The ionized gas in this galaxy is distributed in classical HII regions and in a series of superbubbles (also called giant shells) covering a large fraction of the optical extent of the galaxy. We present a catalog of kinematical properties of both the HII regions of this galaxy and the superbubbles. We have also compared the kinematics of the ionized gas in HII regions to search for possible dynamic differences between neutral and ionized gas MH - Bulgaria MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000167112500004 L2 - galaxies : irregular;galaxies : individual : IC 1613;galaxies : kinematics and dynamics;Local Group;(ISM): HII regions;ISM : bubbles;H-II REGIONS; LARGE MAGELLANIC CLOUD; WOLF-RAYET STARS; BVRI CCD PHOTOMETRY; STELLAR CONTENT; LUMINOSITY FUNCTIONS; SIZE DISTRIBUTIONS; NEARBY GALAXIES; DWARF GALAXIES; IC-1613 SO - Astronomy & Astrophysics 2001 ;366(1):35-53 4477 UI - 13630 AU - Valencia-Flores M AU - Resendiz M AU - Castano VA AU - Santiago V AU - Campos RM AU - Montes J AU - Rosales M AU - Bliwise DL AD - UNAM, PUIS, Fac Psicol, Mexico City, DF, MexicoEmory Univ, Sch Med, Sleep Disorders Ctr, Atlanta, GA 30303, USA TI - Comparison of maintenance wakefulness test and multiple sleep latency test in obese sleep apnea patients MH - Mexico|Distrito Federal MH - USA PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000168230900486 SO - Sleep 2001 ;24():A283-A283 4478 UI - 12334 AU - Valencia-Moreno M AU - Ruiz J AU - Barton MD AU - Patchett PJ AU - Zurcher L AU - Hodkinson DG AU - Roldan-Quintana J AD - UNAM, Estac Reg Noroeste, Inst Geol, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAValencia-Moreno, M, UNAM, Estac Reg Noroeste, Inst Geol, Apartado Postal 1039, Hermosillo 83000, Sonora, Mexico TI - A chemical and isotopic study of the Laramide granitic belt of northwestern Mexico: Identification of the southern edge of the North American Precambrian basement AB - Along the Laramide belt of northwestern Mexico, granitic rocks of similar bulk composition show isotopic and trace element signatures that help to delineate the position of the southern edge of the North American Precambrian basement. In the northern part, the Laramide plutons (the "northern granites") intruded Proterozoic crystalline rocks and a thick Late Proterozoic through Paleozoic miogeoclinal cover of North American affinity. In the central part, the granitic bodies (the "central granites") were emplaced into a sequence of Paleozoic eugeoclinal rocks overlain by Late Triassic elastic units. The southern part of the belt (the "southern granites") intruded a less-known crust characterized by middle to late Mesozoic island-are-related volcanic and sedimentary rocks of the Guerrero terrane. Data from a suite of metaluminous to slightly peraluminous calc-alkalic granitic rocks along the belt display north-to-south geochemical and isotopic variations, which could correlate with the type of intruded basement. The northern and central granites are characterized by strongly fractionated, light rare earth element (REE)-enriched patterns, which display generally pronounced negative europium anomalies, whereas the southern granites have lower total REE enrichments and much flatter chondrite-normalized slopes displaying almost no europium anomalies. Isotopic results also suggest regional variations, as shown by the following initial Sr and epsilon (Nd) ranges: 0.7070 to 0.7089 and -4.2 to -5.4, respectively, for the northern granites; 0.7060 to 0.7079 and -3.4 to -5.1 for the central granites; and 0.7026 to 0.7062 and -0.9 to +4.2 for the southern granites. On the basis of their isotopic similarities, the Proterozoic mafic to intermediate lower crust revealed by xenoliths from young volcanic flows in southern Arizona and northern Mexico is interpreted as a reasonable parental source for the northern and central granites; however, mantle-derived melts are not excluded. The more primitive southern granites are interpreted to come from a source that lacked Proterozoic basement. Instead, they were probably derived by mixing of juvenile mantle melts with partial melts of the lower parts of the Guerrero terrane. In general, the north-to-south compositional variations of the Laramide granitic rocks of northwestern Mexico reflect the crustal structure underneath the batholiths. The Sr and Nd data indicate that the edge of the North American Precambrian basement extends approximately southeastward from the coastal bathofith of central Sonora; then, about 200 km south of Hermosillo in southern Sonora, the edge bends eastward and continues to the east beneath the Sierra Madre Occidental volcanic province MH - Mexico|Sonora MH - USA PB - COLLEGE STN: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000172289600004 L2 - geochemistry;granitic rocks;Laramide;Mexico;petrogenesis;WESTERN UNITED-STATES; MESOZOIC CRUSTAL STRUCTURE; PORPHYRY COPPER-DEPOSITS; TERTIARY GRANITE; VOLCANIC-ROCKS; ND; EVOLUTION; SR; MANTLE; ORIGIN SO - Geological Society of America Bulletin 2001 ;113(11):1409-1422 4479 UI - 13909 AU - Valencia L AU - Bidet M AU - Martial S AU - Sanchez E AU - Melendez E AU - Tauc M AU - Poujeol C AU - Martin D AU - Namorado MD AU - Reyes JL AU - Poujeol P AD - Univ Nice Sophia Antipolis, CNRS, UMR6548, F-06108 Nice 2, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fisiol, Mexico City 07000, DF, MexicoPoujeol, P, Univ Nice Sophia Antipolis, CNRS, UMR6548, Parc Valrose, F-06108 Nice 2, France TI - Nifedipine-activated Ca2+ permeability in newborn rat cortical collecting duct cells in primary culture AB - To characterize Ca2+ transport in newborn rat cortical collecting duct (CCD) cells, we used nifedipine, which in adult rat distal tubules inhibits the intracellular Ca2+ concentration ([Ca2+](i)) increase in response to hormonal activation. We found that the dihydropyridine (DHP) nifedipine (20 muM) produced an increase in [Ca2+](i) from 87.6 +/- 3.3 nM to 389.9 +/- 29.0 nM in 65% of the cells. Similar effects of other DHP (BAY K 8644, isradipine) were also observed. Conversely, DHPs did not induce any increase in [Ca2+](i) in cells obtained from proximal convoluted tubule. In CCD cells, neither verapamil nor diltiazem induced any rise in [Ca2+](i). Experiments in the presence of EGTA showed that external Ca2+ was required for the nifedipine effect, while lanthanum (20 mM), gadolinium (100 mM), and diltiazem (20 mM) inhibited the effect. Experiments done in the presence of valinomycin resulted in the same nifedipine effect, showing that K+ channels were not involved in the nifedipine-induced [Ca2+](i) rise. H2O2 also triggered [Ca2+](i) rise. However, nifedipine-induced [Ca2+](i) increase was not affected by protamine. In conclusion, the present results indicate that 1) primary cultures of cells from terminal nephron of newborn rats are a useful tool for investigating Ca2+ transport mechanisms during growth, and 2) newborn rat CCD cells in primary culture exhibit a new apical nifedipine-activated Ca2+ channel of capacitive type (either transient receptor potential or leak channel) MH - France MH - Mexico|Distrito Federal PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Cell Biology;Physiology U5 - J;Article AV - English IS - 0363-6143 UR - ISI:000168221100020 L2 - calcium channel;dihydropyridine;kidney;newborn;RECEPTOR MESSENGER-RNA; CALCIUM-CHANNEL; CONVOLUTED TUBULE; METABOLIC INHIBITION; VENTRICULAR MYOCYTES; PARATHYROID-HORMONE; CYTOSOLIC CALCIUM; NEPHRON SEGMENTS; RENAL TUBULES; LEAK CHANNEL SO - American Journal of Physiology-Cell Physiology 2001 ;280(5):C1193-C1203 4480 UI - 13716 AU - Valenzuela AI AU - Popa DS AU - Redondo MJ AU - Manes J AD - Univ Valencia, Fac Farm, Toxicol Lab, Valencia 46100, SpainCtr Invest Alimentac & Desarrollo, Hermosillo 1735, Sonora, MexicoUMF Iuliu Hatieganu, Fac Farm, Cluj Napoca 3400, RomaniaManes, J, Univ Valencia, Fac Farm, Toxicol Lab, Av Vicent Andres Estelles S-N, Valencia 46100, Spain TI - Comparison of various liquid chromatographic methods for the analysis of avermectin residues in citrus fruits AB - Various liquid chromatographic (LC) techniques for analyzing avermectin (Abamectin) were compared after extraction of residues from citrus fruit samples by matrix solid-phase dispersion (MSPD). LC with UV and fluorescence detection were used as also was LC coupled to the mass spectrometer by an electrospray interface. The results obtained by the three methods were compared in terms of sensitivity and selectivity. The combination of MSPD extraction and LC with fluorescence detection have made it possible to quantify 0.5 mug kg(-1) of Abamectin in 0.5 g of orange sample, with an overall average recovery of 94%. The procedure provides a simple and sensitive method for monitoring Abamectin residues in citrus fruit at the levels required by legislation. (C) 2001 Elsevier Science BV. All rights reserved MH - Mexico|Sonora MH - Romania MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000168678800006 L2 - fruits;food analysis;avermectin;pesticides;8,9-Z-AVERMECTIN B-1 RESIDUES; IONIZATION MASS-SPECTROMETRY; FLUORESCENCE DETECTION; RAPID-DETERMINATION; UV DETECTION; ABAMECTIN; EXTRACTION; VEGETABLES; MATRICES; LETTUCE SO - Journal of Chromatography A 2001 ;918(1):59-65 4481 UI - 12605 AU - Valladares AA AU - Alvarez F AU - Liu Z AU - Sticht J AU - Harris J AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoMol Simulat Inc, San Diego, CA 92121, USAMat Design Inc, Oceanside, CA 92057, USAKFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, D-52425 Julich, GermanyValladares, AA, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Ab initio studies of the atomic and electronic structure of pure and hydrogenated a-Si AB - We propose a method to simulate a-Si and a-Si:H using an ab initio approach based on the Harris functional and thermally-amorphisized periodically-continued cells with at least 64 atoms. Hydrogen incorporation was achieved via diffusive addition. In preparing samples that may simulate the distributions of atoms in the amorphous materials, simulated annealing calculations were carried out from given starting conditions using short and long time steps. The different time-steps led to samples having distinctly different topological disorder. The radial distribution functions (partial and total) of the resulting samples were calculated and compared with measured distributions; the agreement is very good. These comparisons allowed some tentative conclusions to be made as regards the kind of disorder prevailing in the real samples. In addition, we studied the effect of the topological disorder on the electronic densities of states of the samples; the passivating effect of hydrogen can be observed MH - Germany MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 18 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000171659800005 L2 - MOLECULAR-DYNAMICS SIMULATIONS; TIGHT-BINDING MODEL; AMORPHOUS-SILICON; NEUTRON-DIFFRACTION; FLOATING BONDS; DEFECTS; SYSTEMS; ENERGY; CARBON SO - European Physical Journal B 2001 ;22(4):443-453 4482 UI - 11905 AU - Valle-Levinson A AU - Delgado JA AU - Atkinson LP AD - Old Dominion Univ, Dept Ocean Earth & Atmospher Sci, Ctr Coastal Phys Oceanog, Norfolk, VA 23529, USAInst Tecnol Mar, Guaymas, Sonora, MexicoValle-Levinson, A, Old Dominion Univ, Dept Ocean Earth & Atmospher Sci, Ctr Coastal Phys Oceanog, Norfolk, VA 23529 USA TI - Reversing water exchange patterns at the entrance to a semiarid coastal lagoon AB - Water velocity and density profiles were obtained in late-spring and late-winter to document reversing mean circulation patterns at the entrance to a semiarid coastal lagoon, the Bay of Guaymas, in the Gulf of California, Mexico. The lagoon is shallow but the bathymetry at its entrance is similar to that of temperate estuaries with an asymmetrically positioned channel flanked by shoals. In late-spring the mean circulation at the entrance to the lagoon was driven by horizontal density gradients that arose from excess evaporation over precipitation in the area as evidenced by water density profiles. The lagoon exported relatively warm (25(.)8 degreesC) and salty (36(.)2) water to the Gulf of California through the channel. This export was consistent with inverse estuarine circulation influenced by bathymetry. In late-winter, the circulation at the entrance of the lagoon was mostly driven by wind stress that blew from the northwest, roughly along the main axis of the lagoon. Relatively cool (16(.)0) degreesC) and less salty (35(.)1) water from the Gulf of California was driven into the lagoon within the channel. Density gradients inside the lagoon seem to have played a secondary role in driving the circulation. The late-winter circulation was then estuarine-like, with outflow in the direction of the wind over the shallow areas and a compensatory inflow appearing in the channel as expected from theory of wind-driven flow over bathymetry. This estuarine-like circulation developed despite the lack of measurable freshwater input to the lagoon and was the opposite to that observed in late-spring. These observations then document a reversal in water exchange patterns from season to season in a semiarid coastal lagoon. The observations also constitute one of the few reported examples of flow over shoals driven in the same direction as the wind stress with a compensatory flow in the channel. (C) 2001 Academic Press MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000173510100006 L2 - SEASONAL HEAT-BALANCE; CALIFORNIA; GULF; CIRCULATION; ESTUARY; OCEAN SO - Estuarine Coastal and Shelf Science 2001 ;53(6):825-838 4483 UI - 14403 AU - Valor A AU - Fernandez-Bertran J AU - Radilla J AD - IPN, CICATA, Res Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoUniv Havana, Fac Phys, La Habana, CubaCtr Pharmaceut Chem, La Habana, CubaIPN, Sch Math & Phys, Mexico City 07738, DF, MexicoValor, A, IPN, CICATA, Res Ctr Appl Sci & Adv Technol, Legaria 694,Col Irrigac, Mexico City 11500, DF, Mexico TI - On the interactions of potassium bromide with alkali fluorides AB - The interactions of alkali fluorides (LiF, NaF, KF, CsF) with potassium bromide (KBr) by milling and by crystallization from water solutions have been studied by X-ray diffraction and IR techniques. KBr reacts with CsF according to CsF + KBr - KF + CsBr. With LiF and NaF, KBr does not react. With KF, KBr forms a very hygroscopic solid in which KF partially dissolves in the water of hydration and also forms the crystalline phase KF . 2H(2)O. (C) 2001 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-1139 UR - ISI:000166676200023 L2 - alkali fluorides;mechanochemistry;KBr interactions;MECHANOCHEMICAL EQUILIBRATION; PHASE-DIAGRAM; SYSTEMS SO - Journal of Fluorine Chemistry 2001 ;107(1):137-139 4484 UI - 13421 AU - Valverde PL AU - Fornoni J AU - Nunez-Farfan J AD - Univ Autonoma Metropolitana, Dept Biol, Unidad Iztapalapa, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USAValverde, PL, Univ Autonoma Metropolitana, Dept Biol, Unidad Iztapalapa, Apartado Postal 55-535, Mexico City 09340, DF, Mexico TI - Defensive role of leaf trichomes in resistance to herbivorous insects in Datura stramonium AB - This study assessed the role of leaf trichome density as a component of resistance to herbivores, in six populations of Datura stramonium. Phenotypic selection on plant resistance was estimated for each population. A common garden experiment was carried out to determine if population differences in leaf trichome density are genetically based. Among population differences in leaf trichome density, relative resistance and fitness were found. Leaf trichome density was strongly positively correlated to resistance across populations. In 5 out of 6 populations, trichome density was related to resistance, and positive directional selection on resistance to herbivores was detected in three populations. Differences among populations in mean leaf trichome density in the common garden suggest genetic differentiation for this character in Datura stramonium. The results are considered in the light of the adaptive role of leaf trichomes as a component of defence to herbivores, and variable selection among populations MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1010-061X UR - ISI:000169497300008 L2 - adaptation;Datura stramonium;defence;herbivory;leaf trichomes;phenotypic selection;GLANDULAR TRICHOMES; NATURAL-SELECTION; IPOMOEA-PURPUREA; EVOLUTIONARY ECOLOGY; GENETIC-VARIATION; PLANT-RESPONSES; BRASSICA-RAPA; MORNING GLORY; TOLERANCE; COEVOLUTION SO - Journal of Evolutionary Biology 2001 ;14(3):424-432 4485 UI - 12912 AU - Vansevicius V AU - Vazdekis A AU - Prada F AD - Inst Phys, LT-2600 Vilnius, LithuaniaNatl Astron Observ, Tokyo 181, JapanUniv Tokyo, Inst Astron, Tokyo 181, JapanUNAM, Observ Astron Nacl, Inst Astron, Mexico City, DF, MexicoVansevicius, V, Inst Phys, Gostauto 12, LT-2600 Vilnius, Lithuania TI - A photometric system for metallicity mapping in galaxies AB - A new photometric system suitable for deep, precise and quick metallicity mapping in galaxies is proposed. We find a linear correlation between our metallicity index and the Mg-2 index for stellar, globular-cluster, and early-type galaxy spectra, and model spectral energy distributions of the simple stellar populations MH - Japan MH - Lithuania MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000170945400072 L2 - GALACTIC GLOBULAR-CLUSTERS; OLD STELLAR POPULATIONS; ELLIPTIC GALAXIES; INDEXES SO - Astrophysics and Space Science 2001 ;276(2-4):915-920 4486 UI - 14031 AU - varado-Flores E AU - valos-Diaz E AU - Diaz LA AU - Herrera-Esparza R AD - CBE Univ Autonoma Zacatecas Guadalupe, Dept Immunol, Zac, MexicoUniv N Carolina, Dept Dermatol, Chapel Hill, NC 27514, USAAvalos-Diaz, E, Chepinque 306,Col Lomas Soledad, Zacatecas 98040, Mexico TI - Anti-idiotype antibodies neutralize in vivo the blistering effect of Pemphigus foliaceus IgG AB - Idiotypes are molecular clues used to explore the specificity and diversity of immune response. In the present study, anti-idiotype antibodies were used to neutralize the pathogenic effects induced by the injection of pemphigus immunoglobulin(Ig)G into BALB/c mice. To achieve our goal, antidesmoglein 1 IgG was obtained from a patient with pemphigus foliaceus with high titer of antiepithelial antibodies. The IgG was isolated by ion exchange chromatography, then digested by pepsin. F(ab')(2) fragments were purified in Sephacryl S-300 and injected in rabbits to produce anti-idiotype antibodies. The rabbit sera reacted with the pemphigus F(ab')(2) fragments. Eleven pemphigus foliaceus sera were recognized by the anti-idiotype serum at the light or heavy chains whereas bullous pemphigoid and normal IgG were negative. Neonatal BALB/c mice injected with pemphigus IgG developed intraepidermal blisters, mimicking the clinical and immunopathological features of the pemphigus. In contrast, the animals treated with anti-idiotype antibodies and pemphigus IgG did not develop blisters. Thus, anti-idiotype antibodies neutralize in vivo the pathogenic effects of pemphigus IgG MH - Mexico|Zacatecas MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Immunology U5 - J;Article AV - English IS - 0300-9475 UR - ISI:000167634400007 L2 - VULGARIS ANTIGEN; NEONATAL MICE; ACANTHOLYSIS; EXPRESSION; INDUCTION SO - Scandinavian Journal of Immunology 2001 ;53(3):254-258 4487 UI - 13398 AU - varado-Mendez E AU - Rojas-Laguna R AU - vina-Cervantes JG AU - Torres-Cisneros M AU - ndrade-Lucio JA AU - Pedraza-Ortega JC AU - Kuzin EA AU - Sanchez-Mondragon JJ AU - Vysloukh V AD - Univ Guanajuato, FIMEE Dept Elect, Salamanca 36730, SpainINAOE, Puebla 7200, MexicoUniv Autonoma Estado Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoAlvarado-Mendez, E, Univ Guanajuato, FIMEE Dept Elect, Apartado Postal 215-A, Salamanca 36730, Spain TI - Total internal reflection of spatial solitons at interface formed by a nonlinear saturable and a linear medium AB - We study numerically and experimentally the reflection of spatial solitons at the interface between a nonlinear saturable-type medium and a linear one. We emphasize on determining the physical conditions under which the reflected beam at the interface conserve its nondiffracting properties. Depending on the incidence angle, we find three critical regions for spatial soliton conservation after reflection. We numerically show that the nonlinear Goos-Hanchen shift can have a dramatic effect on the diffracting properties of the reflected beam. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Morelos MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000169546400034 L2 - spatial solitons;photorefractive effect;SEMICONDUCTOR-DOPED GLASSES; LIGHT-BEAM PROPAGATION; SURFACE-WAVES; BI12TIO20 CRYSTAL; PARTICLE; DYNAMICS SO - Optics Communications 2001 ;193(1-6):267-276 4488 UI - 13640 AU - varado-Rodriguez I AU - Halevi P AU - Sanchez AS AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicados, Cuernavaca 62210, Morelos, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoAlvarado-Rodriguez, I, Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90024 USA TI - Dipole radiation in a one-dimensional photonic crystal: TE polarization AB - We study the power emitted by an oscillating dipole in a superlattice (SL) modeled by means of a periodic distribution of Dirac delta functions (Dirac comb SL). The radiation is permitted to propagate in all directions in space; however, it is restricted to the transverse electric (TE) polarization mode. The calculation is based on a classical theory of radiation in nonuniform dielectric media by Dowling and Bowden [Phys. Rev. A 46, 612 (1992)]. The emitted power is derived in terms of a single integral, with no approximations. A SL has no omnidirectional photonic band gaps, and therefore the power is always finite. The power spectrum exhibits slope discontinuities. which occur at the band edges for on-axis propagation. It also depends strongly on the dipole's position in the SL and on the grating strength that characterizes the Dirac comb model. The power peaks for low frequencies, and there can be large enhancement of emission as compared to free space. The closer the dipole is to a barrier (Dirac delta) and the greater the grating strength, the stronger the enhancement is. These conclusions are expected to be relevant for a real SL MH - USA MH - Mexico|Morelos MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000168730800092 L2 - INHIBITED SPONTANEOUS EMISSION; PLANAR DIELECTRIC MICROCAVITIES; ENHANCED SPONTANEOUS EMISSION; WAVE-FUNCTION APPROACH; DENSITY-OF-STATES; BAND-GAP; RESONANCE FLUORESCENCE; INHOMOGENEOUS-MEDIA; LIGHT EXTRACTION; COHERENT CONTROL SO - Physical Review e 2001 ;6305(5): 4489 UI - 12302 AU - Varady R AU - Lankao PR AU - Hankins K AD - Univ Arizona, Udall Ctr Studies Publ Policy, Tucson, AZ 85721, USAUAM, Dept Polit & Cultura, Xochimilco, MexicoVarady, R, Univ Arizona, Udall Ctr Studies Publ Policy, Tucson, AZ 85721 USA TI - Managing hazardous materials along the US-Mexico border MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Environmental Studies U5 - J;Article AV - English IS - 0013-9157 UR - ISI:000172503100004 L2 - HEALTH SO - Environment 2001 ;43(10):22-36 4490 UI - 12655 AU - varez-Cardenas S AU - Guerrero-Cardenas I AU - Diaz S AU - Galina-Tessaro P AU - Gallina S AD - Ctr Invest Biol Noroeste, La Paz, BoliviaInst Ecol, Xalapa 91000, Veracruz, MexicoAlvarez-Cardenas, S, Ctr Invest Biol Noroeste, SC Mar Bermejo 195,Cp 23090 AP 128, La Paz, Bolivia TI - The variables of physical habitat selection by the desert bighorn sheep (Ovis canadensis weemsi) in the Sierra del Mechudo, Baja California Sur, Mexico AB - Selection of physical habitat variables by desert bighorn sheep Ovis canadensis weemsi in the Sierra del Mechudo, Baja California Sur is analysed. Seasonal differences among sex and age classes were found. Sheep are mainly in mountain slopes and canyon slopes ( > 80%) with SE and N orientation, changing along the day and season. The elevation is 100-400 m a.s.l. and the distance to escape terrain < 200 m. Segregation of rams occurs outside the rut, with ram selecting different habitat variables during lambing, winter and spring. The prefered waterholes are near escape terrain with poor vegetal cover and good visibility. (C) 2001 Academic Press MH - Bolivia MH - Mexico|Veracruz PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000171533000010 L2 - desert bighorn sheep;Ovis canadensis weemsi;habitat use;habitat availability;habitat selection;Sierra del Mechudo;MULE DEER; POWER ANALYSIS; ARIZONA SO - Journal of Arid Environments 2001 ;49(2):357-374 4491 UI - 12455 AU - varez-Franco M AU - Llori G AU - Gerson R AU - Bale AE AD - Yale Univ, Sch Med, New Haven, CT, USAInst Catalan Oncol, Barcelona, SpainHosp Gen Mexico City, Mexico City, DF, Mexico TI - BRCA1 and BRCA2 founder mutations in Spanish and Mexican populations MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648900494 SO - American Journal of Human Genetics 2001 ;69(4):268-268 4492 UI - 14179 AU - varez-Idaboy JR AU - Mora-Diez N AU - Boyd RJ AU - Vivier-Bunge A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv La Habana, Fac Quim, Lab Quim Computac & Toer, Habana 10400, CubaInst Mexicano Petr, Mexico City 07730, DF, MexicoDalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, CanadaVivier-Bunge, A, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico TI - On the importance of prereactive complexes in molecule-radical reactions: Hydrogen abstraction from aldehydes by OH AB - In this work, the OH + formaldehyde and OH + acetaldehyde reactions have been characterized using accurate ab initio methods with, large basis sets. The results clearly indicate that the reaction occurs by hydrogen abstraction, and that the OH addition channel is unfavorable. Close to zero (for formaldehyde) and negative (for acetaldehyde) activation energy values are obtained, which are in excellent agreement with the experimentally observed values. The reaction rate constants, calculated using the classical transition-state theory as applied to a complex mechanism involving the formation of a prereactive complex, reproduce very well the reported experimental results. Consideration of the prereactive complex is shown to be essential for the determination of the height of the energy barrier and thus for the correct; calculation of thy tunneling factor MH - Canada MH - Cuba MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 65 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000167253200029 L2 - NEGATIVE ACTIVATION-ENERGIES; ATMOSPHERIC OXIDATION; HYDROXYL RADICALS; RATE CONSTANTS; AB-INITIO; FORMALDEHYDE; MECHANISM; ACETALDEHYDE; CHEMISTRY; ETHENES SO - Journal of the American Chemical Society 2001 ;123(9):2018-2024 4493 UI - 13735 AU - varez-Lajonchere L AU - Guerrero-Tortolero D AU - Perez-Urbiola JC AD - Empresa CUBATECNICA, Playa, Ciudad De La Ha, CubaCtr Invest Biol Noroeste SC, La Paz 23000, Baja California, MexicoGuerrero-Tortolero, D, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - Validation of an ovarian biopsy method in a sea bass, Centropomus medius Gunther AB - In the present study, the establishment and validation of an ovarian biopsy method for in vivo assessment of oocyte maturation in the snook. Centropomus medius Gunther, is described. Diameter and morphological characteristics of intra-ovarian oocytes siphoned with a polyethylene cannula were analysed fresh, preserved with 1% formalin in 0.7% NaCl solution and also cleared with Serra solution. There were no effects detected of the preservative solution on the opaque oocytes within the 24-h interval of the test. The clearing solution allowed excellent visibility of the membrane thickness, yolk appearance and germinal vesicle. Oocytes from each of the five ovarian sites of all examined females were in different prematuration stages and those on the tertiary yolk globule stage had a unimodal diameter frequency distribution and their diameter means were not significantly different among sites (P > 0.01) on eight females. In vivo and in vitro samples of the eight females examined were not significantly different (P > 0.05). As samples obtained with the polyethylene cannula are representative of the ovary central portion, an estimate of the coefficient of variation corrected for bias (P < 0.05) for 20 means of repeated in vivo samples was 1.4 +/- 0.47. The results obtained demonstrate that for the species studied, the biopsy method is satisfactory, providing representative samples of the ovaries with the required precision MH - Cuba MH - Mexico|Baja California MH - United Kingdom PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000168687900008 L2 - Centropomus medius Gunther;methodology;sexual maturity;ovaries;biopsy;Mexico;LATES-CALCARIFER BLOCH; HORMONE ANALOG LHRHA; MUGIL-CEPHALUS L; MULLET SO - Aquaculture Research 2001 ;32(5):379-384 4494 UI - 13357 AU - varez-Leefmans FJ AU - Leon-Olea M AU - Mendoza-Sotelo J AU - Alvarez FJ AU - Anton B AU - Garduno R AD - Inst Nacl Psiquiatria, Div Neurosci, Mexico City 14370, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Pharmacobiol, Mexico City 07000, DF, MexicoWright State Univ, Dept Physiol & Biophys, Dayton, OH 45435, USAWright State Univ, Dept Anat, Dayton, OH 45435, USAInst Nacl Psiquiatria, Div Clin Res, Mexico City 14370, DF, MexicoAlvarez-Leefmans, FJ, Inst Nacl Psiquiatria, Div Neurosci, Av Mexico Xochimilco 101, Mexico City 14370, DF, Mexico TI - Immunolocalization of the Na+-K+-2Cl(-) cotransporter in peripheral nervous tissue of vertebrates AB - Efflux of Cl- through GABA(A)-gated anion channels depolarizes the cell bodies and intraspinal terminals of sensory neurons, and contributes to the generation of presynaptic inhibition in the spinal cord. Active accumulation of Cl- inside sensory neurons occurs through an Na+-K+-2Cl(-) cotransport system that generates and maintains the electrochemical gradient for this outward Cl- current. We studied the immunolocalization of the Na+-K+-2Cl(-) cotransporter protein using a monoclonal antibody (T4) against a conserved epitope in the C-terminus of the molecule. Western blots of frog, rat and cat dorsal root ganglion membranes revealed a single band of cotransporter immunoreactivity at similar to 160 kDa, consistent with the molecular mass of the glycosylated protein. Deglycosylation with N-glycosidase F reduced the molecular mass to similar to 135 kDa, in agreement with the size of the core polypeptide. Indirect immunofluorescence revealed strong cotransporter immunoreactivity in all types of dorsal root ganglion cell bodies in frog, rat and cat. The subcellular distribution of cotransporter immunoreactivity was different amongst species. Membrane labeling was more apparent in frog and rat dorsal root ganglion cell bodies than in cat. In contrast, cytoplasmic labeling was intense in cat and weak in frog, being intermediate in the rat. Cotransporter immunoreactivity also occurred in satellite cells, particularly in rat and cat dorsal root ganglia. The membrane region and axoplasm of sensory fibers were heavily labeled in cat and rat and less in frog. Three-dimensional reconstruction of confocal optical sections and dual immunolocalization with S-100 protein showed that the cotransporter immunoreactivity was prominently expressed in the nodal and paranodal regions of the Schwann cells. Ultrastructural immunolocalization confirmed the presence of immunoreactivity on the membranes of the axon and the Schwan cell in both the nodal region and the paranode. Treatment with sodium dodecylsulfate and beta -mercaptoethanol also uncovered intense cotransporter immunoreactivity in Schmidt-Lanterman incisures at the light microscopic level. The localization of the Na+-K+-2Cl(-) cotransporter protein is consistent with its function as a Cl--accumulating mechanism in sensory neurons, Its distinctive presence in Schwann cells suggests that it could also be involved in K+ uptake from the extracellular space, particularly in the paranodal region of myelinated axone, thereby regulating the extracellular ionic environment and the excitability of axons. (C) 2001 IBRO. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000169377100024 L2 - Na+-K+-Cl- cotransport;DRG cells;Schwann cell;presynaptic inhibition;potassium buffering;intracellular Cl-;ROOT GANGLION NEURONS; K-CL COTRANSPORTER; NA-K-2CL COTRANSPORTER; MOLECULAR-CLONING; CELLS; GABA; LOCALIZATION; CHANNELS; ISOFORMS; FIBERS SO - Neuroscience 2001 ;104(2):569-582 4495 UI - 14233 AU - varez-Mesquida AA AU - Rodriguez-Ramos R AU - Comas F AU - Monsivais G AU - Esquivel-Sirvent R AD - Inst Cibernet Matemat & Fis, Havana 10400, CubaUniv La Habana, Fac Matemat & Computac, Havana 10400, CubaInst Ingn, Mexico City 01000, DF, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaUNAM, Inst Fis, Mexico City, DF, MexicoAlvarez-Mesquida, AA, Inst Cibernet Matemat & Fis, Calle D353,15 & 17, Havana 10400, Cuba TI - Scattering of shear horizontal piezoelectric waves in piezocomposite media AB - The theory of shear horizontal wave scattering processes in layered piezoelectric composites is discussed in terms of a recursive system of equations involving the piezoelectric impedance. Piezoelectric materials of hexagonal 6 mm symmetry are considered. The behavior of an incident shear horizontal piezoelectric wave is analyzed as a function of the material properties, layer thicknesses, and frequency (omega). By an appropriate choice of the materials and layer thicknesses, frequencies at which almost all energy is transmitted can be found, optimizing the properties of the system for ultrasound transducers. This behavior is also dependent on the incident angle. Furthermore, most laminated materials are bonded using polymers. We show that adding these polymers hampers the response of the piezoelectric laminated system, localizing the transmission at particular incident angles. Thus, sharp spikes of ultrasonic pulses could be generated with these laminated structures. (C) 2001 American Institute of Physics MH - Cuba MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000167133000061 L2 - ELASTIC-WAVES; ACOUSTIC-WAVES; SUPERLATTICES; TRANSMISSION; PROPAGATION; REFLECTION SO - Journal of Applied Physics 2001 ;89(5):2886-2892 4496 UI - 12421 AU - varez-Nava F AU - Soto M AU - Borjas L AU - Ortiz R AU - Rojas A AU - Martinez S AU - Revol A AU - Barrera H AU - Alvarez Z AD - Univ Zulia, Hosp Univ Maracaibo, Fac Med, Unidad Genet Med, Maracaibo 4001, Estado Zulia, VenezuelaUniv Autonoma Nuevo Leon, Fac Med, Dept Bioquim, Unidad Labs Expres & Ingn Genet, Monterrey, MexicoInst Venezolano Seguros Sociales, Maracaibo, VenezuelaAlvarez-Nava, F, Univ Zulia, Hosp Univ Maracaibo, Fac Med, Unidad Genet Med, Ave 23,POB 15374, Maracaibo 4001, Estado Zulia, Venezuela TI - Molecular analysis of SRY gene in patients with mixed gonadal dysgenesis AB - Mixed gonadal dysgenesis (MGD) includes a group of heterogeneous conditions consisting of a dysgenetic testis with a streak gonad. MGD is probably due to a disturbance in testicular determination/differentiation. The objective. of this study is to analyze the SRY ne in MGD patients. A molecular investigation was undertaken in sixteen patients with this disorder in an attempt to determine mutations in SRY through polymerase chain reaction, single strand conformational polymorphism and direct sequencing. Eleven patients showed 45,X/46,XY and five 46,XY karyotype. Mutations in SRY gene were shown to be absent in these patients. This study confirms the findings of other studies. The etiology of MGD is heterogeneous, and cytogenetics mosaicism typically seen in these patients may be a cause of this condition, although, the presence of mutations in testicular organizing genes downstream of SRY is still to rule out. (C) 2001 Editions scientifiques et medicales Elsevier SAS MH - Mexico|Nuevo Leon MH - Venezuela PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 8 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0003-3995 UR - ISI:000172053300009 L2 - direct sequencing;mixed gonadal dysgenesis;PCR;sex development;SRY gene;SSCP;TESTIS-DETERMINING GENE; INHIBITING SUBSTANCE GENE; XY SEX REVERSAL; BOX REGION; HMG BOX; TRUE HERMAPHRODITISM; POINT MUTATION; FEMALES; DNA; DIFFERENTIATION SO - Annales de Genetique 2001 ;44(3):155-159 4497 UI - 12342 AU - varez-Vega M AU - Rodriguez-Carvajal J AU - Reyes-Cardenas JG AU - Fuentes AF AU - Amador U AD - Univ San Pablo, CEU, Fac Ciencias Expt & Tecn, Dept Quim Inorgan & Mat, Madrid, SpainCENS, CEA, Ctr Etud Saclay, F-91191 Gif Sur Yvette, FranceUANL, Fac Ciencias Quim, San Nicolas De Los Garza, Nuevo Leon, MexicoCINVESTAV, IPN, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoAmador, U, Univ San Pablo, CEU, Fac Ciencias Expt & Tecn, Dept Quim Inorgan & Mat, Urbanizac Monteprincipe, Madrid, Spain TI - Synthesis and characterization of new double tungstates Li2MII(WO4)(2) (M = Co, Ni, and Cu) AB - Two new double tungstates, Li2Co(WO4)(2) and Li2Ni(WO4)(2), have been prepared by solid-state reaction and characterized. The structures of these isostructural compounds (triclinic, space group P (1) over bar) have been determined from X-ray and neutron diffraction data and found to be built up of alternating layers of zigzag rows of edge-sharing WO6 octahedra and MO6 octahedra (M = Co2+ or Ni2+) as in wolframite-like phases. However, the MO6 octahedra are arranged in columns but not connected to each other; perpendicular to these columns there are rows of edge-sharing LiO6 octahedra which also connect the different MO6 Octahedra. The structure of a previously reported lithium-copper(II) double tungstate with the same stoichiometry, Li2Cu(WO4)(2), has also been determined and found to be similar to that proposed for these new double tungstates. The three compounds melt incongruently at temperatures between 750 and 770 degreesC. Conductivity measurements revealed that these compounds are not good ionic conductors probably because of the full occupancy of lithium positions which hinders the motion of the ions along the (LiO6)(infinity) columns MH - France MH - Mexico|Coahuila MH - Mexico|Nuevo Leon MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000172323700015 L2 - CRYSTAL-STRUCTURE; MOLYBDATE; LASER SO - Chemistry of Materials 2001 ;13(11):3871-3875 4498 UI - 13181 AU - Vargas-Alarcon G AU - Salgado N AU - Granados J AU - Gomez-Casado E AU - Martinez-Laso J AU - cocer-Varela J AU - rnaiz-Villena A AU - arcon-Segovia D AD - Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Biol Sect, Tlalpan 14080, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoHosp Univ 12 Octubre, Dept Immunol, Madrid, SpainVargas-Alarcon, G, Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Biol Sect, Juan Badiano 1, Tlalpan 14080, Mexico TI - Class II allele and haplotype frequencies in Mexican systemic lupus erythematosus patients: The relevance of considering homologous chromosomes in determining susceptibility AB - The aim of the present study was to deter,mine the relevant major histocompatibility complex (MHC) class II alleles in the generic susceptibility to systemic lupus erythematosus (SLE) in Mexican Mestizo patients. We examined the gene and haplotype frequencies of the HLA-DRB1, DQA1 and DQB1 alleles by polymerase chain reaction-sequence-specific oligonucleotide probes in 81 Mexican SLE Mestizo patients and 99 ethnically matched controls. We found a significantly increased frequency of the HLA-DRB1*0301 (p(c) = 0.031, odds ratio = 2.63) allele and significantly decreased frequencies of the DRB1*0802 (p(c) = 0.035) and DRB1*1101 (p(c) = 0.037) alleles in the SLE group. Haplotype analysis showed increased frequencies of DRB1*0301-DQA1*0501-DQB1*0201 (p(c) = 0.017, odds ratio = 2.97), and decreased frequency of DRB1-0802-DQA1*0401-DQB1*0402 (p(c) = 0.034) in SLE patients. The most frequently detected haplotypes in SLE patients showed different haplotypic combinations in the homologous chromosome from those found in controls. Thus, the combinations detected in SLE patients were either not detected in the control group or infrequently found. The results suggest that the DRB1*0301 is the principal class II allele associated with the genetic susceptibility to SLE in Mexican patients and that the presence of a specific haplotype of the homologous chromosome in patients with DRB1*0407-DQA1*03-DQB1*0302 and DRB1*1501-DQA1*0102-DQB1*0602 haplotypes could have an additive effect on the susceptibility to the disease. Finally, the low frequency of the DRB1*0301 and DRB1*1501 alleles in the control population suggests that the genetic admixture between Mexican Indians and Caucasian populations was an event that could have increased the risk of Mexicans to develop SLE. Human Immunology 62, 814-820 (2001). (C) American Society for Histocompatibility and Immunogenetics, 2001. Published by Elsevier Science Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000170158900008 L2 - systemic lupus erythematosus;major histocompatibility complex;genetic susceptibility;haplotypes;alleles;MAJOR HISTOCOMPATIBILITY COMPLEX; C4A DEFICIENCY; HLA-DR; GENE-FREQUENCIES; BLACK-AMERICANS; SLE; ASSOCIATIONS; IMMUNOGENETICS; ALLOANTIGENS; EXPRESSION SO - Human Immunology 2001 ;62(8):814-820 4499 UI - 14108 AU - Vargas-Alarcon G AU - Hernandez-Pacheco G AU - Gamboa R AU - Zuniga J AU - Flores C AU - Gomez-Casado E AU - Martinez-Laso J AU - Granados J AU - rnaiz-Villena A AD - Inst Nacl Cardiol Ignacio Chavez, Cellular Biol Sect, Dept Physiol, Mexico City 14080, DF, MexicoInst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoUniv Madrid, Hosp 12 Octubre, Dept Immunol, Madrid, SpainVargas-Alarcon, G, Inst Nacl Cardiol Ignacio Chavez, Cellular Biol Sect, Dept Physiol, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Polymorphism and distribution of HLA-DR2 alleles in Mexican populations AB - DRB1*15/16 nucleotide polymorphism was analyzed in 68 DR2 positive individuals(18 Mexican Mestizos, 30 Mazatecans and 20 Nahuas), carrying a total of 75 DR2 haplotypes. HLA-DR2 was one of the most frequent specificities detected in Mazatecans and Nahuas with gene frequency (gf) of 0.232 and 0.141, respectively. In these populations DRB1*16 was the most frequent DR2 split (gf = 0.183 in Mazatecans and gf = 0.135 in Nahuas), whereas in Mexican Mestizos the most frequent was DRB1*15 (gf = 0.065). Four DRB1-DQB1 combinations in Mexican Mestizos, two in Mazatecans and one in Nahuas were in linkage disequilibrium. In spite of the restricted polymorphism, there were differences on DRB1*15/16 alleles found in Mexicans. DRB1*1501 a Caucasian allele was predominant in Mexican Mestizos, whereas DRB1*1602 an Amerindian allele was characteristic on Indian populations. An important difference was detected among the Amerindian populations studied since DRB1*1502 was only present in Mazatecans. This data corroborates the restricted polymorphism of DRB1*15/16 and the high frequency of DRB1"16 subtype in autochthonous American populations and suggest that the differences in gene frequencies of DRB1*15/16 alleles could be helpful in distinguishing each of these population. Human Immunology 62, 286-291 (2001). (C) American Society for Histocompatibility and Immunogenetics, 2001. Published by Elsevier Science Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000167577700010 L2 - Major Histocompatibility Complex (MHC);polymorphism;DR2 alleles;Mexican populations;Mazatecans;Nahuas;CLASS-II ALLELES; SYSTEMIC LUPUS-ERYTHEMATOSUS; HLA GENES; HAPLOTYPE FREQUENCIES; EAST-ASIA; AMERINDIANS; DIVERSITY; AMPLIFICATION; RELATEDNESS; MARKERS SO - Human Immunology 2001 ;62(3):286-291 4500 UI - 12818 AU - Vargas CE AU - Hirsch JG AU - Draayer JP AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, CE, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Interband B(E2) transition strengths in odd-mass heavy deformed nuclei AB - Interband B(E2) transition strengths between different normal parity bands in Dy-163 and Er-165 are described using the pseudo-SU(3) model. The Hamiltonian includes Nilsson single-particle energies, quadrupole-quadrupole and pairing interactions with fixed, parametrized strengths. and three extra rotor terms used to fine tune the energy spectra. In addition to interband transitions, the energy spectra and the ground state intraband B(E2) strengths are reported. The results show the pseudo-SU(3) shell model to be a powerful microscopic theory for a description of the normal parity sector in heavy deformed odd-A nuclei MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000170983800020 L2 - SHELL-MODEL DESCRIPTION; LOW-ENERGY STRUCTURE; NORMAL PARITY BANDS; PSEUDOSPIN; SYMMETRY; OPERATOR SO - Physical Review C 2001 ;6403(3): 4501 UI - 13303 AU - Vargas CE AU - Hirsch JG AU - Draayer JP AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, CE, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Quasi-SU(3) truncation scheme for even-even sd-shell nuclei AB - The quasi-SU(3) symmetry was uncovered in full pf and sdg shell-model calculations for both even-even and odd-even nuclei. It manifests itself through a dominance of single-particle and quadrupole-quadrupole terms in a Hamiltonian used to describe well-deformed nuclei. A practical consequence of the quasi-SU(3) symmetry is an efficient basis truncation scheme. In [C.E. Vargas et al., Phys. Rev. C 58 (1998) 1488] it is shown that when this type of Hamiltonian is diagonalized in an SU(3) basis, only a few irreducible representations (irreps) of SU(3) are needed to describe the yrast band, the leading S = 0 irrep augmented with the leading S = 1 irreps in the proton and neutron subspaces. In the present article the quasi-SU(3) truncation scheme is used, in conjunction with a "realistic but schematic" Hamiltonian that includes the most important multipole terms, to describe the energy spectra and B(E2) transition strengths of Ne-20,Ne-22, Mg-24 and Si-28. The effect of the size of the Hilbert space on both sets of observables is discussed, as well as the structure of the yrast band and the importance of the various terms in the Hamiltonian. The limitations of the model are explicitly discussed. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000169728900006 L2 - quasi-SU(3) symmetry;energies;B(E2) values;Ne-20;Ne-22;Mg-24;Si-28;NORMAL PARITY BANDS; DEFORMED-NUCLEI; PSEUDO-SU(3) MODEL; SCISSORS MODE; PF-SHELL; DEFORMATION; QUADRUPOLE; OPERATOR SO - Nuclear Physics A 2001 ;690(4):409-430 4502 UI - 13240 AU - Vargas M AU - Crossa J AU - van Eeuwijk F AU - Sayre KD AU - Reynolds MP AD - CIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoCIMMYT, Wheat Progr, Mexico City 06600, DF, MexicoUniv Autonoma Chapingo, Chapingo, MexicoUniv Wageningen & Res Ctr, Lab Plant Breeding, Dept Plant Sci, NL-6700 AJ Wageningen, NetherlandsCrossa, J, CIMMYT, Biometr & Stat Unit, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Interpreting treatment x environment interaction in agronomy trials AB - Multienvironment trials are important in agronomy because the effects of agronomic treatments can change differentially in relation to environmental changes, producing a treatment X environment interaction (T X E), The aim of this study was to find a parsimonious description of the T X E existing in the 24 agronomic treatments evaluated during 10 consecutive years by (i) investigating the factorial structure of the treatments to reduce the number of treatment terms in the interaction and (ii) using quantitative year covariables to replace the qualitative variable year. Multiple factorial regression (MFR) for specific T X E terms was performed using standard forward selection procedures for finding year covariables that could replace the factor gear in those T X E terms, Subsequently, we compared the results of the final MFR with those of a partial least squares based analysis to achieve extra insight in both the T X E and final MFR model, The MFR model with a stepwise procedure used in this study for describing the T X E showed that the most important interaction with year was that due to different N fertilizer levels and the most important environmental variables that explained year X N interaction were minimum temperatures in January, February, and March and maximum temperature in April. Evaporation in December and April were important covariables for describing year X tillage and year X summer crop interactions, whereas precipitation in December and sun hours in February were important for explaining the year X manure interaction, We also discuss the parallels with extended additive main effect and multiplicative interaction analysis. Biological interpretation of the results are provided MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - Netherlands PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000170047500028 L2 - LEAST-SQUARES REGRESSION; MODELS; WHEAT SO - Agronomy Journal 2001 ;93(4):949-960 4503 UI - 13591 AU - Vargas MA AU - Sheaff M AU - Vergara S AD - Fermi Natl Accelerator Lab, Batavia, IL 60510, USABUAP, Fac Math & Phys Sci, Puebla 72570, MexicoUniv Wisconsin, Dept Phys, Madison, WI 53706, USAVargas, MA, Fermi Natl Accelerator Lab, POB 500,MS 368, Batavia, IL 60510 USA TI - The development of software to characterize the Fermilab pixel readout chip, FPIX1, for the BTeV experiment AB - Fermilab has designed and assembled a pixel-readout-chip sub-assembly containing five FPIX1 chips with flexible cable interconnections with which to address the technical issues involved in system integration for the proposed BTeV pixel detector. The module contains a total of 14 400 pixel cells that need to be characterized in order to test the entire module. Software has been developed within the LabVIEW framework to control a set of instruments to perform threshold and noise tests on all five readout chips. These tests take only a few hours to run. (C) 2001 Published by Elsevier Science B.V MH - USA MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000168871200033 L2 - solid-state detectors;DAQ;pixel SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2001 ;463(1-2):331-340 4504 UI - 12717 AU - Vargas MC AU - Giannozzi P AU - Selloni A AU - Scoles G AD - Princeton Univ, Dept Chem, Princeton, NJ 08544, USAIPN, Unidad Merida, Cinvestav, Dept Fis, Merida 97310, Yucatan, MexicoSelloni, A, Princeton Univ, Dept Chem, Princeton, NJ 08544, USA TI - Coverage-dependent adsorption of CH3S and (CH3S)(2) on Au(111): A density functional theory study AB - The origin of the superlattice present in the commensurate hexagonal structure of self-assembled monolayers of n-alkanethiols on gold and the question of whether the thiols are adsorbed onto the surface as dimers (disulfides) or monomers (thiolates) have been under debate for many years. Looking for a better understanding of the structural properties of these systems, we have performed a theoretical study of the molecular and dissociative adsorption of dimethyl disulfide on Au(111) as a function of coverage (0.25 less than or equal to Theta less than or equal to 1), using gradient-corrected density functional (DFT) calculations with a slab geometry. For the dissociated state, our results indicate that the hcp hollow site is much less favorable than the fee site. For the latter site, we find that, because of surface gold atom relaxation, the adsorption energy depends strongly on Theta, changing from similar to 18 kcal/mol at Theta = 0.25 to similar to3 kcal/mol at Theta = 1. For the bridge site, instead, the adsorption energy is a weak function of Theta, and for all investigated coverages, this site is by far the most stable. According to our DFT approach, the adsorption of dimethyl disulfide is dissociative with a thermodynamic gain, at Theta = 1, of similar to 13 kcal/mol with respect to the adsorbed molecular state. We also find, however, that the energy of c(4 x 2) structures containing at least two inequivalent CH3S groups per unit cell (with a minimum S-S distance of similar to3.7 Angstrom) is, within the accuracy of our approach, indistinguishable from the pure (root3 x root3) hexagonal structure. Our results suggest that the full solution of this thorny problem will require, also for the shortest chains, an estimate of the energetic contribution of dispersion forces that are not included in the DFT calculations MH - Mexico|Yucatan MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 118 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1089-5647 UR - ISI:000171400800016 L2 - SELF-ASSEMBLED MONOLAYERS; SURFACE; GOLD; CHEMISORPTION; DISULFIDES; APPROXIMATION; ENERGY; PHASES; THIOLS SO - Journal of Physical Chemistry B 2001 ;105(39):9509-9513 4505 UI - 13597 AU - Vargas R AU - Garza J AU - Friesner RA AU - Stern H AU - Hay BP AU - Dixon DA AD - Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Bas & Ingn, Dept Quim, Mexico City 09340, DF, MexicoColumbia Univ, Dept Chem, New York, NY 10027, USAHay, BP, Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - Strength of the N-H center dot center dot center dot O=C and C-H center dot center dot center dot O=C bonds in formamide and N-methylacetamide dimers AB - The structures of the dimers of formamide and N-methylacetamide have been calculated at the ab initio electronic structure theory level, second-order Moller-Plesset perturbation theory (MP2) with augmented correlation consistent basis sets. Five unique structures were optimized for the formamide dimers at the MP2/ aug-cc-pVDZ and MP2/aug-cc-pVTZ levels. At the optimized geometries obtained with the aug-cc-pVTZ basis set, MP2 energies were evaluated with the aug-cc-pVQZ basis set, allowing an extrapolation of the energies to the complete basis set limit. Four structures were found for the N-methylacetamide dimer at the MP2/aug-cc-pVDZ level, and single-point energies were calculated at the MP2/aug-cc-pVTZ level. In both systems, the basis set superposition error was estimated with the counterpoise method. The strength of the N-H O-...=C bond has a mean value of 7.1 kcal/mol in the formamide dimers and a mean value of 8.6 kcal/mol in the N-methylacetamide dimers. The difference in hydrogen bond strengths is attributed to differences in basicity at the carbonyl oxygen receptor site. In several dimers C-(HO)-O-...=C hydrogen bonds play an important role in stabilizing these intermolecular complexes, increasing the interaction energy by 1.1-2.6 kcal/mol per interaction MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 93 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000168914900022 L2 - MOLECULAR WAVE-FUNCTIONS; AB-INITIO; HYDROGEN-BOND; FORCE-FIELD; BASIS-SETS; PEPTIDE UNIT; BENCHMARK CALCULATIONS; GLOBULAR-PROTEINS; AMIDE; ENERGIES SO - Journal of Physical Chemistry A 2001 ;105(20):4963-4968 4506 UI - 13798 AU - Vargas R AU - Garza J AU - Dixon D AU - Hay BP AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoHay, BP, Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - Conformational analysis of N-benzylformamide AB - The potential energy surfaces (PES's) at different levels of ah initio electronic structure theory with correlation effects included are reported for rotation about the N(amide)-C(sp(3)) and C(sp(3))-C(aryl) bonds in N-benzylformamide. Fully optimized geometries are in good agreement with crystal structure data and PES's are consistent with the experimental dihedral angle distributions. The results are used to assign MM3 force field parameters to allow calculation on N-benzyl substituted amides, (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000168387000026 L2 - conformation;amide;N-benzyl;ab initio;MM3;ION SEQUESTERING AGENTS; HYDROGEN-BOND; BASIS-SETS; MOLECULAR CALCULATIONS; ENTEROBACTIN ANALOGS; FORCE-FIELD; COMPLEXES; STABILITY; PEPTIDES; LIGANDS SO - Journal of Molecular Structure-Theochem 2001 ;541():243-251 4507 UI - 14397 AU - Vargas R AU - Garza J AU - Dixon D AU - Hay BP AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Azcapotzalco, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoHay, BP, Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - C(sp(2))-C(aryl) bond rotation barrier in N-methylbenzamide AB - The potential energy surfaces at different levels of ab initio electronic structure theory with correlation effects included are reported for rotation about the C(sp(2))-C(aryl) bond in N-methylbenzamide. The results reveal a minimum at a C=C-C=O dihedral angle of +/-28 degrees with barrier heights (MP2/aug-cc-pVTZ//BLYP/DZVP2/A2) of 0.48 kcal/mol at 0 degrees and 2.80 kcal/mol at 90 degrees. Fully optimized geometries are in good agreement with crystal structure data, and potential energy surfaces are consistent with the experimental dihedral angle distribution. The results are used to assign MM3 force field parameters to allow calculation on N-methylbenzamide and other benzamide derivatives MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000166695700015 L2 - ION SEQUESTERING AGENTS; HYDROGEN-BOND; BASIS-SETS; POTENTIOMETRIC EVALUATION; MOLECULAR CALCULATIONS; ENTEROBACTIN ANALOGS; FORCE-FIELD; COMPLEXES; AMIDES; CONFORMATION SO - Journal of Physical Chemistry A 2001 ;105(4):774-778 4508 UI - 13478 AU - Varley NR AU - Armienta MA AD - Inst Geofis, Mexico City 04360, DF, MexicoVarley, NR, 1484 Morgan Rd, San Bernardino, CA 92407, USA TI - The absense of diffuse degassing at Popocatepetl volcano, Mexico AB - Soil gas or flux measurements have shown that many active volcanoes release significant volumes of magmatic gas through their flanks. This type of measurement represents a useful and safer method (compared with direct fumarole measurements) for monitoring an active volcano. However, this study shows that not all volcanoes will have a significant diffuse component, even if substantial quantities of gas are released from the crater. The current phase of volcanic activity at Popocatepetl started in December 1994. Since then, frequent ash emissions have been occurring and very large quantities of SO2 and CO2 have been measured in the summit plume: up to 60,000 t day(-1) of SO2. From August 1997 until April 1999 over 500 measurements of Rn and CO2 in soil gas were performed, with extensive coverage of the volcano. Surprisingly, no CO2 of magmatic origin has been detected. Levels of up to 14% have been measured in some locations, however, with delta C-13 values of between - 17 parts per thousand and - 25 parts per thousand, its origin appears to be biogenic. The average R/R-a, value for the He isotopic ratio of samples of soil gas was 0.49 with all samples giving a radiogenic rather than magmatic signature. Some large ravines in the edifice are thought to mark the location of faults. Large displacements have been measured, but only low concentrations of soil gases were recorded. There is no evidence of a geothermal system, which is likely to be connected to the absence of a diffuse gas component. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000169307500011 L2 - soil gas;carbon dioxide;carbon isotopes;radon;helium isotopes;Popocatepetl;CARBON-DIOXIDE; SOIL-GAS; UNSATURATED ZONE; MOUNT-ETNA; RADON; CO2; HELIUM; EMISSION; ATMOSPHERE; TRANSPORT SO - Chemical Geology 2001 ;177(1-2):157-173 4509 UI - 12959 AU - Vazquez-Dominguez E AU - Paetkau D AU - Tucker N AU - Hinten G AU - Moritz C AD - So Cross Univ, Ctr Anim Conservat Genet, Lismore, NSW 2480, AustraliaQueensland Pk & Wildlife Serv, Ctr Trop Rehabil, Yungaburra, Qld 4872, AustraliaWildlife Genet Int, Edmonton, AB T6G 2V2, CanadaUniv Queensland, Dept Zool & Entomol, St Lucia, Qld 4072, AustraliaVazquez-Dominguez, E, Univ Nacl Autonoma Mexico, Inst Ecol, Circuito Interior,Ap Postal 70-275, Mexico City 04510, DF, Mexico TI - Resolution of natural groups using iterative assignment tests: an example from two species of Australian native rats (Rattus) AB - Sympatric individuals of Rattus fuscipes and Rattus leucopus, two Australian native rats from the tropical wet forests of north Queensland, are difficult to distinguish morphologically and are often confused in the field. When we started a study on fine-scale movements of these species, using microsatellite markers, we found that the species as identified in the field did not form coherent genetic groups. In this study, we examined the potential of an iterative process of genetic assignment to separate specimens from distinct (e.g. species, populations) natural groups. Five loci with extensive overlap in allele distributions between species were used for the iterative process. Samples were randomly distributed into two starting groups of equal size and then subjected to the test. At each iteration, misassigned samples switched groups, and the output groups from a given round of assignment formed the input groups for the next round. All samples were assigned correctly on the 10th iteration, in which two genetic groups were clearly separated. Mitochondrial DNA sequences were obtained from samples from each genetic group identified by assignment, together with those of museum voucher specimens, to assess which species corresponded to which genetic group. The iterative procedure was also used to resolve groups within species, adequately separating the genetically identified R. leucopus from our two sampling sites. These results show that the iterative assignment process can correctly differentiate samples into their appropriate natural groups when diagnostic genetic markers are not available, which allowed us to resolve accurately the two R. leucopus and R. fuscipes species. Our approach provides an analytical tool that may be applicable to a broad variety of situations where genetic groups need to be resolved MH - Australia MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000170667500020 L2 - iterative assignment;microsatellites;Rattus fuscipes;Rattus leucopus;species identification;wet tropics;POPULATION-STRUCTURE; MICROSATELLITE ANALYSIS; GENETIC-DISTANCE; CONSERVATION; DIFFERENTIATION; STATISTICS; GENOTYPES; DISPERSAL; COMPLEX; REGION SO - Molecular Ecology 2001 ;10(8):2069-2078 4510 UI - 14020 AU - Vazquez-Duhalt R AU - Tinoco R AU - D'Antonio P AU - Topoleski LDT AU - Payne GF AD - Univ Maryland Baltimore Cty, Dept Chem & Biochem Engn, Baltimore, MD 21250, USAUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Maryland Baltimore Cty, Dept Mech Engn, Baltimore, MD 21250, USAUniv Maryland, Ctr Agr Biotechnol, College Pk, MD 20742, USAPayne, GF, Univ Maryland Baltimore Cty, Dept Chem & Biochem Engn, 1000 Hilltop Circle, Baltimore, MD 21250 USA TI - Enzyme conjugation to the polysaccharide chitosan: Smart biocatalysts and biocatalytic hydrogels AB - Laccase from Coriolopsis gallica was conjugated to the renewable biopolymer chitosan using carbodiimide chemistry. The laccase-chitosan conjugate was observed to offer three unique properties. First, the laccase-chitosan conjugate displayed pH-responsive behavior such that the conjugate was soluble and active under acidic conditions, but precipitated when the pH was raised toward neutrality. Second, the laccase-chitosan conjugate was more stable than free laccase at extreme pHs. At pH 1, the inactivation rate constant (k(in)) for the soluble laccase-chitosan conjugate was 20-fold less than that for free laccase. At pH 13, k(in) for the insoluble laccase-chitosan conjugate was nearly 3-fold less than that for free laccase. Finally, the laccase-chitosan conjugate could be cross-linked under mild conditions to create biocatalytic hydrogels. Potential benefits for enzyme-chitosan conjugates are discussed MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Chemistry, Multidisciplinary;Chemistry, Organic U5 - J;Article AV - English IS - 1043-1802 UR - ISI:000167796900021 L2 - CROSS-LINKING; TYROSINASE REACTION; SELECTIVE REMOVAL; ORGANIC-SOLVENTS; LACCASE; ADSORPTION; OXIDATION; POLYMERS; GELS; IMMOBILIZATION SO - Bioconjugate Chemistry 2001 ;12(2):301-306 4511 UI - 12983 AU - Vazquez-Montiel S AU - Suzuki T AU - Hosoya M AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoHoya Corp, R&D Ctr, Akishima, Tokyo 1968510, JapanVazquez-Montiel, S, Inst Nacl Astrofis Opt & Elect, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - FOCOIVA lens: a scanner in the lateral and longitudinal directions AB - We propose what to our knowledge is a novel optical system that can scan an optical axis simultaneously in the perpendicular and the longitudinal directions (a two-dimensional scanner), which we have named the FOCOIVA (acronym for focal constant and image variable) lens system. We give the equations for first-order analysis and also the equations of motion for the lenses. Examples calculated with these equations are presented, and finally we give the optical designs for the writing system that will be used for a reader of digital documents. (C) 2001 Optical Society of America MH - Japan MH - Mexico|Puebla PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000170711200014 SO - Applied Optics 2001 ;40(25):4547-4556 4512 UI - 13431 AU - Vazquez-Vega D AU - Rakheja S AU - Ahmed AKW AU - Lozano-Guzman A AD - Mexican Inst Transportat, IMT, Queretaro 76000, MexicoConcordia Univ, CONCAVE Res Ctr, Montreal, PQ H3G 1M8, CanadaVazquez-Vega, D, Mexican Inst Transportat, IMT, Apartado Postal 1098, Queretaro 76000, Mexico TI - Directional performance analysis of an A-train double with externally mounted dampers AB - An A-dolly with externally mounted dampers is proposed to enhance the yaw and lateral directional performance of an A-train double. A kinematic analysis of the external dampers is performed to derive damping forces and moments imposed on the coupled A-dolly and the first semitrailer of the combination. The resulting kinematic model of the external dampers is integrated within the nonlinear yaw-plane model of the A-train to study the performance potentials of the dampers. The directional response characteristics of the combination are evaluated under closed-loop path-change and double path-change manoeuvres, in conjunction with a path-follower driver-vehicle model based upon preview/predictive strategy. An analytical function based on the Magic Formula is further proposed to describe the path co-ordinates for the closed-loop manoeuvres. The results of the study show that damped articulation integrated between the first semitrailer and the A-dolly offers considerable potential for enhancement of the directional performance of the vehicle combination in terms of peak lateral acceleration, yaw rate, and rearward amplification MH - Canada MH - Mexico|Queretaro PB - GENEVA AEROPORT: INDERSCIENCE ENTERPRISES LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Transportation Science & Technology U5 - J;Article AV - English IS - 1351-7848 UR - ISI:000169566000003 L2 - A-dolly;articulated vehicles;A-train double;damped articulation;directional manoeuvres;longer combination vehicle (LCV);path-co-ordinates;rearward amplification SO - Heavy Vehicle Systems-International Journal of Vehicle Design 2001 ;8(2):155-176 4513 UI - 12682 AU - Vazquez FG AU - Sharma VK AU - Mendoza QA AU - Hernandez R AD - Natl Autonomous Univ Mexico, Inst Marine & Limnol, Mexico City 04510, DF, MexicoFlorida Inst Technol, Dept Chem, Melbourne, FL 32901, USAGSIPA, PEMEX, Campeche, MexicoVazquez, FG, Natl Autonomous Univ Mexico, Inst Marine & Limnol, Apartado Postal 70-305, Mexico City 04510, DF, Mexico TI - Metals in fish and shrimp of the Campeche sound, Gulf of Mexico MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000171581700019 L2 - HEAVY-METALS; TRACE-METALS; TISSUES; BIOACCUMULATION; SEDIMENT; REGION; WATER; PRAWN; RIVER SO - Bulletin of Environmental Contamination and Toxicology 2001 ;67(5):756-762 4514 UI - 13039 AU - Vazquez FG AU - Gunzel H AU - Jongen HT AD - Univ Americas, Dept Math & Phys, Puebla 72820, MexicoRhein Westfal TH Aachen, Dept Math C, D-52056 Aachen, GermanyVazquez, FG, Univ Americas, Dept Math & Phys, Puebla 72820, Mexico TI - On logarithmic smoothing of the maximum function AB - We consider the maximum function f resulting from a finite number of smooth functions. The logarithmic barrier function of the epigraph of f gives rise to a smooth approximation g(epsilon) of f itself, where epsilon > 0 denotes the approximation parameter. The one-parametric family g(epsilon) converges - relative to a compact subset - uniformly to the function f as epsilon tends to zero. Under nondegeneracy assumptions we show that the stationary points of g(epsilon) and f correspond to each other, and that their respective Morse indices coincide. The latter correspondence is obtained by establishing smooth curves x(epsilon) of stationary points for g(epsilon), where each x(epsilon) converges to the corresponding stationary point of f as epsilon tends to zero. In case of a strongly unique local minimizer, we show that the nondegeneracy assumption may be relaxed in order to obtain a smooth curve x(epsilon) MH - Germany MH - Mexico|Puebla PB - BUSSUM: BALTZER SCI PUBL BV RP - NOT IN FILE U3 - TC 3 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0254-5330 UR - ISI:000170559000011 L2 - maximum function;logarithmic barrier function;interior approximation;stationary point;Morse index SO - Annals of Operations Research 2001 ;101():209-220 4515 UI - 12202 AU - Vega-Duran JT AU - az-Torres LA AU - Meneses-Nava MA AU - Maldonado-Rivera JL AU - Barbosa-Garcia O AD - Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro 76040, Qro, MexicoCtr Invest Opt, Leon, Gto, SpainVega-Duran, JT, Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Jose Siurob 10,Col Alameda, Queretaro 76040, Qro, Mexico TI - Optimal co-doping concentrations and dynamics of energy transfer processes for Tm3+-Tb(3+)and Tm3+-Eu3+ in LiYF4 crystal hosts AB - The dynamics of energy transfer processes in Tm+3-Tb+3 and Tm3+-Eu+3 wco-doped LiYF4 crystal hosts were studied from time-resolved Tm3+ fluorescence analysis to estimate the optimal co-doping concentrations which maximize 1.5 mum laser emission from the H-3(4) state of Tm3+. The analysis was carried out by finding a numerical solution to the general master equations that govern non-radiative energy transfer processes in crystalline materials and by using the Monte Carlo technique. Our analysis improves the description of experimental fluorescence decay curves. The predicted optimal co-doping concentrations and laser threshold for these luminescent systems are lower than those reported using traditional models for non-radiative energy transfer processes MH - Mexico|Queretaro MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000172643100015 L2 - IONS; TM3+; YB SO - Journal of Physics D-Applied Physics 2001 ;34(21):3203-3208 4516 UI - 12866 AU - Vega-Lopez S AU - Vidal-Quintanar RL AU - Fernandez ML AD - Univ Connecticut, Dept Nutr Sci, Storrs, CT 06269, USAUniv Sonora, Dept Invest & Posgrado Alimentos, Mexico City, DF, MexicoVega-Lopez, S, Univ Connecticut, Dept Nutr Sci, 3624 Horsebarn Rd,Extens U-17, Storrs, CT 06269 USA TI - Sex and hormonal status influence plasma lipid responses to psyllium AB - Background: The primary mechanisms by which soluble fiber lowers plasma cholesterol are well known. However, specific effects of fiber on lipoprotein metabolism and how sex and hormonal status influence these effects are not well defined. Objective: The effects of a psyllium supplement in men, premenopausal women, and postmenopausal women were examined to determine the mechanisms by which psyllium lowers plasma LDL-cholesterol concentrations and affects lipoprotein remodeling in the intravascular compartment. Design: We designed a crossover trial in which 24 men, 23 premenopausal women, and 21 postmenopausal women were randomly assigned for 30 d to a fiber supplement (15 g psyllium/d) or a control. Plasma lipids and cholesteryl ester transfer protein and lecithin-cholesterol acyltransferase (phosphatidylcholine-sterol O-acyltransferase) activities were measured after each treatment. Results: When compared with the control, psyllium intake lowered plasma LDL-cholesterol concentrations by 7-9% (P<0.0001) without affecting plasma HDL-cholesterol concentrations. An interactive effect between fiber and sex and hormonal status was observed for plasma triacylglycerol. Psyllium supplementation significantly lowered plasma triacylglycerol concentrations in men by 17% and raised triacylglycerol concentrations in postmenopausal women by 16% (P<0.01). The dietary treatment did not significantly affect plasma triacylglycerol in premenopausal women. Lecithin-cholesterol acyltransferase was unaffected-by psyllium intake whereas cholesteryl ester transfer protein activity was 18% lower after psyllium supplementation than after the control treatment (P<0.0001). Conclusions: This trial showed that the psyllium-induced responses to plasma lipids were associated with sex and hormonal status and that psyllium, through its action in the intestinal lumen, indirectly affected the intravascular processing of lipoproteins MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 18 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000171045100005 L2 - cholesteryl ester transfer protein;lecithin-cholesterol acyltransferase;dietary soluble fiber;sex;hormonal status;lipoproteins;plasma cholesterol;plasma triacylglycerol;psyllium;men;premenopausal women;postmenopausal women;CORONARY HEART-DISEASE; DENSITY-LIPOPROTEIN CHOLESTEROL; DIETARY SOLUBLE FIBER; CARDIOVASCULAR-DISEASE; RISK-FACTORS; GUINEA-PIGS; LDL-CHOLESTEROL; BILE-ACID; MODERATE HYPERCHOLESTEROLEMIA; HYPOLIPIDEMIC MECHANISMS SO - American Journal of Clinical Nutrition 2001 ;74(4):435-441 4517 UI - 13074 AU - Vega E AU - Mugica V AU - Reyes E AU - Sanchez G AU - Chow JC AU - Watson JG AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Azcapotzalco, Mexico City, DF, MexicoDesert Res Inst, Reno, NV 89512, USAVega, E, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Chemical composition of fugitive dust emitters in Mexico City AB - The gravimetric and chemical composition of fugitive dust emitters of Mexico City were analyzed to determine the particulate matter source profiles. Samples of geological material, unpaved and paved roads, agricultural soil, dried lake, asphalt, cement plants, landfill, gravel, and tezontle soil, were collected directly from the ground using a broom and a dustpan. These were dried, sieved and taken through a laboratory resuspension chamber to emulate the natural wind-blown processes of bulk soils and also to provide a uniform deposit on Teflon membrane and quartz fiber filters for further gravimetric and chemical analyses Of PM2.5 and PM10 size fractions. Chemical analyses of the filters included X-ray fluorescence for elemental composition, ion chromatography for water soluble anions, atomic absorption for water soluble metals, automated colorimetric analysis for ammonium and thermal/optical reflectance analysis for carbon species. The data show that most fugitive emitters are composed of 20-30% PM2.5, which is relatively less than the reported contribution by fossil fuels and biomass (40-60%). (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 24 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000170437000012 L2 - PM10;PM2.5;source profile;Mexico City;fugitive dust;chemical mass balance;AIR-POLLUTION SO - Atmospheric Environment 2001 ;35(23):4033-4039 4518 UI - 12593 AU - Vega FJ AU - Cosma T AU - Coutino M AU - Feldmann RM AU - Nyborg TG AU - Schweitzer CE AU - Waugh DA AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoKent State Univ, Dept Geol, Kent, OH 44242, USAInst Hist Nat Estado Chiapas, Tuxtla Gutierrez 29000, Chiapas, MexicoVega, FJ, Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - New middle Eocene decapods (Crustacea) from Chiapas, Mexico AB - Decapod crustacean specimens from the middle Eocene San Juan Formation in central Chiapas represent the first record of Eocene decapods in southern Mexico. New taxa include: Dardanus mexicanus new species (Diogenidae), Lophoranina cristaspina new species, Notopus minutus Dew species (Raninidae); Verrucoides stenohedra new genus and new species (Xanthidae); Stoaplax nandachare new genus and new species (Goneplacidae); and Viapinnixa alvarezi new species (Pinnotheridae). Verrucoides verrucoides new genus and new combination from the Paleocene of Greenland represents a new combination. In addition, the fauna includes Callianassa sensu lato sp., Laeviranina sp., Calappilia cf. C. hondoensis Rathbun, 1930, Eriosachila sp., and indeterminate calappid and xanthoid taxa. This assemblage bears close relationship with coeval faunas in the Tethyan region of southern Europe and southern North America and with Paleocene faunas of Greenland, strengthening the evidence for previously described patterns of dispersal within the Decapoda MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 13 U4 - Paleontology U5 - J;Article AV - English IS - 0022-3360 UR - ISI:000171674100001 L2 - BRACHYURA; FAMILY; WASHINGTON SO - Journal of Paleontology 2001 ;75(5):929-946 4519 UI - 14056 AU - Vega FJ AU - Feldmann RM AU - Garcia-Barrera P AU - Filkorn H AU - Pimentel F AU - Avendano J AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoKent State Univ, Dept Geol, Kent, OH 44242, USANatl Autonomous Univ Mexico, Fac Ciencias, Museum Paleontol, Mexico City 04510, DF, MexicoInst Hist Nat Estado Chiapas, Tuxtla Gutierrez 29000, Chiapas, MexicoVega, FJ, Natl Autonomous Univ Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Maastrichtian crustacea (Brachyura : Decapoda) from the Ocozocuautla Formation in Chiapas, southeast Mexico AB - More than thirty complete specimens of Carcineretes planetarius Vega, Feldmann, Ocampo, and Pope, 1997, a member of the extinct decapod family Carcineretidae, have been collected from the upper part of the Ocozocuautla Formation in Chiapas, southeast Mexico. Stratigraphic occurrences of Carcineretes in the Caribbean Province suggest that this crab should be regarded as an index fossil for the early Maastrichtian. Six samples of this species may represent individuals that died during molting. The sudden disappearance of this family at the end of the Maastrichtian and its restricted paleobiogeographic distribution in the vicinity of the impact site suggest that the Carcineretidae may have been affected by the Chicxulub impact. Other decapod specimens collected from the same localities were assigned to the Xanthidae; Parazanthopsis meyapaquensis new genus and species, and Megaxantho zoque, new genus and species, are described. They constitute the second and third reports of Cretaceous xanthid crabs from Mexico. A lagoonal paleoenvironment is suggested, based on associated fauna and flora. Occurrences of index species of benthic and planktic foraminifera along with that of diagnostic rudist species confirm an early Maastrichtian age MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 15 U4 - Paleontology U5 - J;Article AV - English IS - 0022-3360 UR - ISI:000167718000008 L2 - ALBION-ISLAND; JAMAICA; BELIZE SO - Journal of Paleontology 2001 ;75(2):319-329 4520 UI - 13475 AU - Vega KG AU - Chavira MG AU - de la Vega OM AU - Simpson J AU - Vandemark G AD - IPN, CINVESTAV, Dept Biotecnol & Bioquim, Irapuato 36500, Gto, MexicoIPN, CINVESTAV, Dept Ingn Genet, Irapuato 36500, Gto, MexicoVandemark, G, ARS, USDA, 24106 N Bunn Rd, Prosser, WA 99350, USA TI - Analysis of genetic diversity in Agave tequilana var. Azul using RAPD markers AB - By federal law in Mexico, A. tequilana Weber var. Azul is the only variety of agave permitted for the production of any tequila. Our objective was to assay levels of genetic variation in field populations of A. tequilana var. Azul using randomly amplified polymorphic DNA (RAPD) markers. Ten plants were collected from each of four different fields, with two fields being located in each of two principal regions of Mexico for the cultivation of A. tequilana var. Azul. The two regions are separated geographically by approximately 100km. Genetic relationships between A. tequilana var. Azul and two other varieties of A. tequilana Weber, 'Chato' and 'Siguin', were also investigated using RAPDs. Among the three varieties, 19 decamer primers produced 130 markers, of which 20 (15.4%) were polymorphic between A. tequilana var. Chato and A. tequilana var. Siguin. The results of RAPD analysis suggest that A. tequilana var. Siguin is more closely related to A. tequilana var. Azul than is A. tequilana var. Chato. Among the 40 field selections of A. tequilana var. Azul, only 1 of 124 RAPD products (0.8%) was polymorphic and 39 of 40 plants were completely isogenic. This is one of the lowest levels of polymorphism detected to date for the analysis of a crop species, and is proposed to be the result of the promotion of a single conserved genotype over many years due to an exclusive reliance on vegetative propagation for the production of new planting materials. The significance of these results is discussed in relation to breeding programs focused on the improvement of A. tequilana var. Azul MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000169329500011 L2 - Agave tequilana;genetic diversity;RAPDs;tequila;YUCCA-FILAMENTOSA AGAVACEAE; POPULATION SO - Euphytica 2001 ;119(3):335-341 4521 UI - 13672 AU - Veihe A AU - Rey J AU - Quinton JN AU - Strauss P AU - Sancho FM AU - Somarriba M AD - Roskilde Univ, Dept Geog & Int Dev Studies, DK-4000 Roskilde, DenmarkUniv Autonoma Chapingo, Dept Suelos, Chapingo 56230, Estado Mexico, MexicoCranfield Univ, Inst Water & Environm, Silsoe MK45 4DT, Beds, EnglandFed Agcy Water Management, Inst Land & Water Management, A-3252 Petzenkirchen, AustriaUniv Costa Rica, Ctr Invest Agron, San Pedro, Costa RicaUniv Nacl Agr, Fac Recursos Nat & Ambiente, Managua, NicaraguaVeihe, A, Roskilde Univ, Dept Geog & Int Dev Studies, Hus 19-2,POB 260, DK-4000 Roskilde, Denmark TI - Modelling of event-based soil erosion in Costa Rica, Nicaragua and Mexico: evaluation of the EUROSEM model AB - This study was undertaken as part of a larger project to evaluate the impact of soil erosion on soil productivity in Costa. Rica, Nicaragua and h lexico. An important part of the overall project consists of the use of the event-based EUROSEM model (European Soil Erosion Model) to predict soil erosion rates. This paper evaluates the use of the model both for single event and yearly soil loss estimations using erosion plot data from Nicaragua and data obtained through rainfall simulator experiments in Costa Rica and Mexico. EUROSEM was calibrated based on the hydrographs followed by the sedigraphs in Costa Rica and Mexico and this was followed by a model validation. In Nicaragua, model calibration was done using total soil loss values for 1993 and the model was consecutively validated using plot data for 1994 and 1995. The study stresses the importance of calibrating the model for individual catchments, and that the total area of plant stems and soil cohesion are crucial calibration parameters when modelling grassland with cover percentages above 60%. EUROSEM generally did not perform well on single event simulations in terms of simulating hydrographs and sedigraphs. Whereas the difference between observed and simulated total soil loss was between 0.0% and 100.0%. differences in total discharge, peak run-off rate and peak soil loss ranged between 2.0% and 326.5%. The difference was attributed to the model's inability to model crusting. The application of the model for yearly soil loss predictions looks promising with simulated and observed total soil loss values in Nicaragua differing by between 2.5% and 5.0%. (C) 2001 Elsevier Science B.V. All rights reserved MH - Austria MH - Costa Rica MH - Denmark MH - United Kingdom MH - Mexico|Estado De Mexico MH - Nicaragua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary;Soil Science;Water Resources U5 - J;Article AV - English IS - 0341-8162 UR - ISI:000168794800002 L2 - soil erosion modelling;model evaluation;EUROSEM;Costa Rica;Nicaragua;Mexico;SWISS RAINFALL SIMULATORS; SENSITIVITY ANALYSIS; GERMAN; RUNOFF SO - Catena 2001 ;44(3):187-203 4522 UI - 12393 AU - Velasco M AU - Lezama E AU - Hernandez-Hernandez R AU - rmas-Hernandez MJ AU - rmas-Padilla MC AU - Alcocer L AU - Reyes A AD - Cent Univ Venezuela, Vargas Hosp, Clin Pharmacol Unit, Caracas, VenezuelaCent Univ Venezuela, Vargas Sch Med, Dept Pharmacol, Caracas, VenezuelaUniv Centroccidental Lisandro Alvarado, Sch Med, Clin Pharmacol Unit, Barquisimeto, VenezuelaUniv Nacl Autonoma Mexico, Serv Cardiol, Mexico City 04510, DF, MexicoInst Cardiol Teor, Montevideo, UruguayVelasco, M, Apartado Postal 76333,El Parques, Caracas 1070A, Venezuela TI - Semipersonalized psychological evaluation of quality of life in hypertensive patients during a trial with two calcium antagonists: a multicenter Latin-American Study (LASTLHY) AB - Objective:. The main objective of this study was to evaluate well-being and physical activity of 248 hypertensive patients, including 177 females, who had previously been included in the Latin-American Study on Lacidipine in Hypertension (LASTLHY). Subjects, materials and methods: This open study was carried out in 12 clinical centers in Argentina, Brazil, Colombia, Mexico and Venezuela, to compare, over a period of 16 weeks, the antihypertensive action of a fixed-dose, once daily of 4 mg lacidipine administered orally to 120 patients and 30 mg nifedipine GITS (Gastro-Intestinal Therapeutic System) administered to 128 patients, aged between 40 and 65 years. All patients had mild to moderate hypertension and treatment was begun at the end of a one-week placebo run-in period (end of week -1). Well-being and physical activity were assessed by means of single questionnaire, which reflected the physical and cultural diversities amongst the clinical centers and patients. The questionnaire included 13 multiple-choice and 8 contingent open questions. The score of each question was multiplied by a coefficient related to the importance of each question to the patient (semipersonalization); the coefficient was obtained from cultural and socioeconomic data collected at the time of enrollment. The semipersonalization was carried out by a blind psychological study with respect to the medication and had a high repeatability in the assignment of personalized coefficients to the score of each question. The scores of each question were added to obtain an overall well-being and activity scoring. The possible theoretical range for the overall scoring in this study was 10 - 124. Results: See Table 1. Conclusion: The study revealed that the administration of calcium channel blockers such as lacidipine and nifedipine GITS, and lacidipine in particular, produced low incidence of side effects, and lacidipine in particular induced significant improvement in the quality of life MH - Mexico|Distrito Federal MH - Uruguay MH - Venezuela PB - OBERHACHING: DUSTRI-VERLAG DR KARL FEISTLE RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0946-1965 UR - ISI:000172232900001 L2 - arterial blood pressure;quality of life;hypertension;nifedipine;lacidipine SO - International Journal of Clinical Pharmacology and Therapeutics 2001 ;39(8):325-330 4523 UI - 13381 AU - Velazquez A AU - Romero FJ AU - Rangel-Cordero H AU - Heil GW AD - UNAM, Inst Geog, Mexico City, DF, MexicoUAM Xochimilco, Dept Hombre & Ambiente, Lab Ecol & Conservac Fauna Silvestre, Mexico City, DF, MexicoUniv Utrecht, Lab Plant Ecol & Evolutionary Biol, NL-3508 TC Utrecht, NetherlandsVelazquez, A, Cruz Azul 14, Mexico City 14370, DF, Mexico TI - Effects of landscape changes on mammalian assemblages at Izta-Popo Volcanoes, Mexico AB - Rapid habitat transformation calls for efficient methods to lead conservation efforts. For this reason, landscape analysis is becoming a major issue in biodiversity conservation. In Mexico, as in many parts of the world, management strategies are scarce so that biodiversity depletion processes continue. This is the case on the Izta-Popo volcanoes, which harbour over 10% of the total Mexican mammalian species within ca. 0.02% of the surface of Mexico. The present paper aims at assessing the effect of landscape dynamics on mammalian assemblages through a RS/GIS modelling approach. A database including all mammalian species recorded in the region from 1839 up to 1997 was compiled. The records, at genus level, were linked to land cover classes obtained from TM Landsat satellite images taken in 1986 and 1997. Land cover and habitat changes were analysed through a statistical analysis by crossing land cover maps of 1986 and 1997 which were transformed into habitat richness types. Major changes from high to medium and medium to low habitat richness classes prevail in the area. This reduces the resilience of the natural landscapes and increases the threats for most mammalian species. From a landscape ecological perspective, the present paper demonstrates the importance of the area as a unique mosaic of mammalian assemblages MH - Mexico|Distrito Federal MH - Netherlands PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000169648200004 L2 - conservation;landscape changes;mammals;RS/GIS;volcanoes;HABITAT SO - Biodiversity and Conservation 2001 ;10(7):1059-1075 4524 UI - 14086 AU - Velazquez V AU - Hirsch JG AU - Sun Y AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Strasbourg 1, CNRS, IN2P3, Inst Rech Subatom, F-67037 Strasbourg 2, FranceUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAXuzhou Normal Univ, Dept Phys, Xuzhou 221009, Jiangsu, Peoples R ChinaHirsch, JG, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Band crossing and signature splitting in odd mass f p shell nuclei AB - Structure of two sets of mirror nuclei: V-47-Cr-47 and C-49-Mn-49, as well as V-49 and M-51, is studied using the projected shell model. Their yrast spectra are described as an interplay between the angular momentum projected states around the Fermi level which carry different intrinsic K-quantum numbers. The deviations from a regular rotational sequence are attributed to band crossing and signature splitting, which are usually discussed in heavy nuclear systems. Our results agree reasonably with experimental data, and are comparable with those from the full pf shell model calculations. (C) 2001 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000167628800007 L2 - projected shell model;rotational band;backbending;energy staggering;band crossing;signature splitting;HIGH-SPIN STATES; MIRROR NUCLEI; CR-48; MODEL; SPECTROSCOPY; CR-50; TERMINATION SO - Nuclear Physics A 2001 ;686():129-140 4525 UI - 13102 AU - Velez CA AU - Lehman M AU - Garavaglia M AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Nacl La Plata, La Plata, Buenos Aires, ArgentinaCtr Invest Opt, La Plata, Buenos Aires, ArgentinaLehman, M, Inst Nacl Astrofis Opt & Elect, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - Two-dimensional fractal gratings with variable structure and their diffraction AB - Our interest is to treat the relationship between the geometry of the object and the corresponding intensity distribution in the scattered fields. The mathematical method for representing complex objects is important for the study of the fine structure in the Fraunhofer region. In the present work we make two considerations about the construction method that facilitates us the study of the scattered fields based on more simple structures, such as periodic distributions which were widely used in classical optics. The first consideration is an extension of a previous result on Cantor gratings for two-dimensional fractals with a variable fine structure. The mathematical foundation for these cases is related with the intersection between sets. The second consideration is the construction of other fractal sets, such as the Koch snowflake, through the union operation. In each case different aspects of the obtained diffraction pattern are shown. Also. the contribution from the simple components of the structures are taken into account for future applications in dynamic optical processing MH - Argentina MH - Mexico|Puebla PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4026 UR - ISI:000170395700006 L2 - fractals;Sierpinsky carpet;Koch snowflake;diffraction;Fraunhofer;FRAUNHOFER-DIFFRACTION; REGULAR FRACTALS; SELF-SIMILARITY; KOCH FRACTALS; SCATTERING; TRANSMISSION; REFLECTION; APERTURES SO - Optik 2001 ;112(5):209-217 4526 UI - 14015 AU - Ventura E AU - Nearing MA AU - Norton LD AD - Purdue Univ, USDA ARS, Natl Soil Eros Res Lab, W Lafayette, IN 47907, USAUniv Queretaro, Hydraul Program, Queretaro, MexicoNearing, MA, Purdue Univ, USDA ARS, Natl Soil Eros Res Lab, W Lafayette, IN 47907 USA TI - Developing a magnetic tracer to study soil erosion AB - Soil erosion is commonly measured as the quantity of sediment leaving a plot or watershed. The techniques for measuring soil erosion patterns and sediment redistribution within plots or watersheds by direct monitoring are very limited. The objective of this study was to develop a direct and non-intrusive tracer method to study the sources, patterns and rates of erosion and deposition of sediments in erosion plots. The magnetic tracer developed in this study consisted of polystyrene plastic beads embedded with a magnetic powder (magnetite). The "magnetized" beads, with a mean weight diameter of 3.2 mm and particle density of about 1.2 g cm(-3) were uniformly mixed with soil and tested in the laboratory using simulated rainfall and inflow studies to simulate the interrill and rill components of soil erosion, respectively. In the interrill and rill experiments, the tracer was transported in the same proportion it was initially mixed with the soil. Given this fact, a magnetometer, which measures the soil's magnetic susceptibility, could be used to identify areas of deposition or detachment. The magnetic susceptibility would be increased or reduced depending on whether deposition or detachment occurs. To simulate detachment and deposition, a magnetometer was tested for different tracer concentrations and different thickness of soil containing the tracer. The magnetometer promises to be a sensitive, accurate, and useful tool to study the spatial variation of soil erosion when magnetic tracers are used. Published by Elsevier Science B.V MH - USA MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary;Soil Science;Water Resources U5 - J;Article AV - English IS - 0341-8162 UR - ISI:000167800900001 L2 - soil erosion;interrill erosion;rill erosion;magnetic tracer;sediment;FIELDS; MODEL SO - Catena 2001 ;43(4):277-291 4527 UI - 12721 AU - Vera-Cabrera L AU - Hernandez-Vera MA AU - Welsh O AU - Johnson WM AU - Castro-Garza J AD - Hosp Univ Jose E Gonzalez, Serv Dermatol, Monterrey, NL, MexicoIMSS, Ctr Invest Biomed Noreste, Monterrey, MexicoHlth Canada, Fed Labs, Winnipeg, MB, CanadaVera-Cabrera, L, Hosp Univ Jose E Gonzalez, Serv Dermatol, Col Mitras Ctr, Monterrey, NL, Mexico TI - Phospholipase region of Mycobacterium tuberculosis is a preferential locus for IS6110 transposition AB - Enzymes with phospholipase C activity in Mycobacterium tuberculosis have been recently described. The three genes encoding these proteins, plcA, plcB, and plcC, are located at position 2351 of the genomic map of M. tuberculosis H37Rv and are arranged in tandem. We have previously described the presence of variations in the restriction fragment length polymorphism patterns of the plcA and plcB genes in M. tuberculosis clinical isolates. In the present work we investigated the origin of this polymorphism by sequence analysis of the phospholipase-encoding regions of 11 polymorphic M. tuberculosis clinical isolates. To do so, a long-PCR assay was used to amplify a 5,131-bp fragment that contains the plcA and plcB genes and part of the plcC gene. In the M. tuberculosis strains studied the production of an amplicon similar to1,400 bp larger than anticipated was observed. Sequence analysis of the PCR products indicated the presence of a foreign sequence that corresponded to an IS6110 element. We observed insertion elements in the plcA, plcB, and plcC genes. One site in plcB had the highest incidence of transposition (5 out of 11 strains). In two strains the insertion element was found in plcA in the same nucleotide position. In all the cases, IS6110 was transposed in the same direction. The high level of transposition in the phospholipase region can lead to the excision of fragments of genomic DNA by recombination of neighboring IS6110 elements, as demonstrated by finding the deletion, in two strains, of a 2,837-bp fragment that included plcA and most of plcB. This can explain the negative results obtained by some authors when detecting the mtp40 sequence (plcA) by PCR. Given the high polymorphism in this region, the use of the mtp40 sequence as a genetic marker for M. tuberculosis sensu stricto is very restricted MH - Canada MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000171382600013 L2 - INSERTION-SEQUENCE; ESCHERICHIA-COLI; COMPLEX STRAINS; FRAGMENT; GENOME; IDENTIFICATION; POLYMORPHISM; DIAGNOSIS; ELEMENT; GENE SO - Journal of Clinical Microbiology 2001 ;39(10):3499-3504 4528 UI - 14477 AU - Vera-Villamizar N AU - Dottori H AU - Puerari I AU - De Carvalho R AD - Univ Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, BrazilInst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoObserv Nacl, BR-20921400 Rio De Janeiro, BrazilVera-Villamizar, N, Univ Fed Rio Grande Sul, Inst Fis, CxP 15051, BR-91501970 Porto Alegre, RS, Brazil TI - Analysis of resonances in grand design spiral galaxies AB - We have searched for corotation resonances (CRs) in three southern grand design spiral galaxies : NGC 1365, NGC 1566, and NGC 2997. We have also introduced a method of quantifying errors in the phase diagram used to detect CRs. We established the m=2 pattern CR at 12.1, 9.4, and 7 kpc for NGC 1365, NGC 1566, and NGC 2997, respectively. By using published rotation curves, we could determine spiral pattern angular speeds of 25.0, 12.2, and 17.6 km s(-1) kpc(-1), respectively. A three-armed component ha been detected in NGC 2997, with the CR placed at 8.7 kpc with a pattern angular speed Omega (CR3) = 12.7 km s(-1) kpc(-) (1). An m = 1 component was detected in NGC 1566. We warily locate the CR at 7.1 kpc, with a pattern angular speed Omega (CR) similar or equal to 16.6 km s(-1) kpc(-1). This pattern does not present inner Lindblad resonance. Ages have been determined by studying the radial density profile of th m = 2 Fourier components in g (newly formed stars) and i (perturbing spiral density wave supported by the disk of old stars), aided by the global aspect of the real spiral pattern in comparison with numerical simulations. the pattern is similar to 1200 Myr old in NGC 1365, similar to 800 Myr old in NGC 1566, and younger than 80 Myr in NGC 2997 MH - Brazil MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000166595200020 L2 - galaxies : individual (NGC 1365, NGC 1566, NGC 2997);galaxies : kinematics and dynamics;galaxies : spiral;galaxies : structure;methods : numerical;COROTATION RESONANCE; BARRED GALAXIES; PATTERN SPEEDS; STAR FORMATION; DISKS; ARMS; CLASSIFICATION; SIMULATIONS; NGC-4321; NGC-7479 SO - Astrophysical Journal 2001 ;547(1):187-199 4529 UI - 13163 AU - Verdu E AU - Garcia-Alias G AU - Fores J AU - Gudino-Cabrera G AU - Muneton VC AU - Nieto-Sampedro M AU - Navarro X AD - Univ Autonoma Barcelona, Dept Cell Biol Physiol & Immunol, Neuroplast & Regenerat Grp, E-08193 Bellaterra, SpainCSIC, Inst Cajal, Neural Plast Grp, E-28002 Madrid, SpainUniv Guadalajara, Dept Cellular & Mol Biol, Guadalajara, Jalisco, MexicoNavarro, X, Univ Autonoma Barcelona, Dept Cell Biol Physiol & Immunol, Neuroplast & Regenerat Grp, Edif M, E-08193 Bellaterra, Spain TI - Effects of ensheathing cells transplanted into photochemically damaged spinal cord AB - Transplantation of olfactory ensheathing cells (OECs) into photochemically damaged rat spinal cord diminished astrocyte reactivity and parenchyma cavitation. The photochemical lesion performed at T12-L1 resulted in severe damage to the spinal cord, so that during the first 15 days postoperation all rats dragged their hindlimbs and did not respond to pinprick. The maximal area and volume of the cystic cavities were lower in transplanted than in non-transplanted rats, not significantly at the T12-L1 lesion site, but significantly at T9-T10 and L4-L6 cord levels. The density of astrocytes in the grey matter was similar at T12-L1 and L4-L6 in non-transplanted and trans-planted rats, but lower in the latter at T9-T10 level. However, in non-transplanted rats all astrocytes showed a hypertrophied appearance, with long and robust processes heavily GFAP-positive, and overexpression of proteoglycan inhibitor of neuritogenesis, whereas in transplanted rats only a few astrocytes showed hypertrophy and the majority had short, thin processes. These results indicate that OECs transplanted into damaged adult rat spinal cord exert a neuroprotective role by reducing astrocytic gliosis and cystic cavitation. NeuroReport 12:2303-2309 (C) 2001 Lippincott Williams & Wilkins MH - Mexico|Jalisco MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 38 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000170141600006 L2 - astrocyte;cystic cavity;ensheathing cells;photochemical injury;spinal cord;NEURITE OUTGROWTH INHIBITOR; GLIA TRANSPLANTS; PARAPLEGIC RATS; OLFACTORY-BULB; CNS INJURY; REGENERATION; ASTROCYTES; BRAIN; AXONS; INDUCTION SO - Neuroreport 2001 ;12(11):2303-2309 4530 UI - 12506 AU - Verma SP AD - Max Planck Inst Chem, Abt Geochem, Mainz, GermanyVerma, SP, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Priv Xochicalco S-No,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemical evidence for a rift-related origin of bimodal volcanism at Meseta Rio San Juan, north-central Mexican volcanic belt AB - This study reports new geochemical and Sr and Nd isotope data for 11 samples of hy-normative late Miocene (similar to6.5 Ma) basalt, basaltic andesite, and rhyolitic volcanic rocks from Meseta Rio San Juan, located in the states of Hidalgo and Queretaro, Mexico, in the north-central part of the Mexican Volcanic Belt (MVB). The in situ growth-corrected initial isotopic ratios of these rocks are as follows: Sr-87/Sr-86 0.703400-0.709431 and Nd-143/Nd-144 0.512524-0.512835. For comparison, the isotopic ratios of basaltic rocks from this area show very narrow ranges as follows: 87Sr/86Sr 0.703400-0.703540 and Nd-143/Nd-144 0.512794-0.512835. The available geological, geochemical, and isotopic evidence does not support the generation of the basic and intermediate magmas by direct (slab melting), nor by indirect (fluid transport to the mantle) participation of the subducted Cocos plate. The basaltic magmas instead could have been generated by partial melting of the upper mantle. The evolved basaltic andesite magmas could have originated from such basaltic magmas through assimilation coupled with fractional crystallization. Rhyolitic magmas might represent partial melting of different parts of the underlying heterogeneous crust. Their formation and eruption probably was facilitated by extensional tectonics and upwelling of the underlying mantle. The different petrogenetic processes proposed here for basaltic and basaltic andesite magmas on one hand and rhyolitic magmas on the other might explain the bimodal nature of Meseta Rio San Juan volcanism. Finally, predictions by the author about the behavior of Sr and Nd isotopic compositions for subduction-related magmas is confirmed by published data for the Central American Volcanic Arc (CAVA) MH - Germany MH - Mexico|Morelos PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 6 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000171891700001 L2 - PETROGENETIC IMPLICATIONS; TRACE-ELEMENT; ROCKS; CLASSIFICATION; ASSIMILATION; MAGMATISM; ALKALINE; CALDERA; FRONT; ARC SO - International Geology Review 2001 ;43(6):475-493 4531 UI - 13839 AU - Verma SP AD - Max Planck Inst Chem, Abt Geochim, D-6500 Mainz, GermanyVerma, SP, UNAM, Ctr Invest Energia, Priv Xochicalco S-No,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemical evidence for a lithospheric source for magmas from Acoculco caldera, eastern Mexican Volcanic Belt AB - This study reports new geochemical and Sr-Nd-Pb radiogenic isotope data on eight samples of hy-nonnative Quaternary basaltic-to-rhyolitic volcanic rocks from Acoculco caldera, located in the state of Puebla, Mexico, at the eastern part of the Mexican Volcanic Belt (MVB). The isotopic ratios of basaltic rocks are as follows: Sr-87/Sr-86 similar to 0.70383, Nd-143/Nd-144 similar to 0.51283, Pb-206/Pb-204 similar to 18.78, Pb-207/Pb-204 similar to 15.60, and Pb-208/Pb-204 similar to 38.119. These isotopic ratios are somewhat similar to the rift-related basic rocks from Los Humeros caldera, eastern MVB, as well as from the Sierra de Chich-inautzin monogenetic field along the volcanic front of the central MVB. For comparison, all samples from basalt to rhyolite in the Acoculco area show the following ranges: S-87/S-86, 0.703824-0.706413, Nd-143/Nd-144 0.512685-0.512837, Pb-206/Pb-204 18.778-18.810, Pb-207/Pb-204 15.599-15.628, and Pb-208/Pb-204 38.487-38.608. The basaltic rocks from the Acoculco caldera do not show the characteristic negative Nh anomaly with respect to Ba and Ce, as is Epical of such magmas in volcanic arcs. Available geochemical and isotopic evidence does not support the generation of these basic magmas by direct (slab melting) or indirect (fluid transport to the mantle) participation of the subducted Cocos plate. They could be generated in the upper mantle from a lithospheric source, similar to that proposed recently for the nearby Los Humeros caldera. The evolved basaltic trachyandesitic, basaltic andesitic, and rhyolitic magmas could have originated from such basaltic magmas through assimilation coupled with fractional crystallization.,All available geological, geochemical, and geophysical evidence also supports the recently proposed tectonic-petrogenetic model for the origin of magmas in the MVB MH - Germany MH - Mexico|Morelos PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 13 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000168291500002 L2 - PLUME-RELATED MAGMATISM; CALC-ALKALIC VOLCANISM; ISLAND BASALT TYPE; TRACE-ELEMENT; FRACTIONAL CRYSTALLIZATION; TECTONIC IMPLICATIONS; CRUSTAL ASSIMILATION; CONTINENTAL-CRUST; ACTIVE MARGIN; ARC MAGMAS SO - International Geology Review 2001 ;43(1):31-51 4532 UI - 13931 AU - Verma SP AD - Max Planck Inst Chem, Abt Geochem, D-6500 Mainz, GermanyVerma, SP, UNAM, Ctr Invest Energia, Priv Xochicalco S No,Col Ctr,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemical and Sr-Nd-Pb isotopic evidence for a combined assimilation and fractional crystallisation process for volcanic rocks from the Huichapan caldera, Hidalgo, Mexico AB - This study reports new geochemical and Sr-Nd-Pb isotopic data for Miocene to Quaternary basaltic to andesitic, dacitic, and rhyolitic Volcanic rocks from the Huichapan caldera, located in the central part of the Mexican Volcanic Belt (MVB). The initial Sr and Nd isotopic ratios, except for one rhyolite, range as follows: Sr-87/Sr-86 0.70357-0.70498 and Nd-143/Nd-144 0.51265-0.51282. The Sr-Nd-Pb isotopic ratios are generally similar to those for volcanic rocks from other areas of the central and eastern parts of the MVB. The isotopic ratios of one older pre-caldera rhyolite (HP30) from the Huichapan area, particularly its high Sr-87/Sr-86, are significantly different from rhyolitic rocks from this and other areas of the MVB, but are isotopically similar to some felsic rocks from the neighbouring geological province of Sierra Madre Occidental (SMO), implying an origin as a partial melt of the underlying crust. The evolved andesitic to rhyolitic magmas could have originated from a basaltic magma through a combined assimilation and fractional crystallisation (AFC) process. Different compositions, representing lower crust (LC) and upper crust (UC) as well as a hypothetical crust similar to the source of high Sr-87/Sr-86 rhyolite HP30, were tested as plausible assimilants for the AFC process. The results show that the UC represented by granitic rocks from a nearby Los Humeros area or by Cretaceous limestone (L) rocks outcropping in the northern part of the study area, and the LC represented by granulitic xenoliths from a nearby San Luis Potosi (SLP) area are not possible assimilants for Huichapan magmas, whereas a hypothetical crust (HA) similar in isotopic compositions to rhyolite HP30 could be considered a possible assimilant for the AFC process. Chemical composition of assimilant HA, although not well constrained at present, was inferred under the assumption that HP30 type partial melts could be generated from its partial melting. These data were then used to evaluate the proposed AFC process to explain the evolution of the Huichapan magmas. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0024-4937 UR - ISI:000167959800002 L2 - Mexican volcanic belt;Mexico;isotopes;calderas;assimilation;fractional crystallisation;geochemistry;HIGH-SILICA RHYOLITES; SIERRA-LA-PRIMAVERA; RARE-EARTH ELEMENT; SAN-LUIS-POTOSI; PARTITION-COEFFICIENTS; TRACE-ELEMENTS; HIGH-PRESSURE; CRUSTAL ASSIMILATION; BASALTIC LIQUIDS; ORTHO-PYROXENE SO - Lithos 2001 ;56(2-3):141-164 4533 UI - 13365 AU - Viader-Salvado JM AU - Garza-Gonzalez E AU - Valdez-Leal R AU - del Bosque-Moncayo MD AU - Tijerina-Menchaca R AU - Guerrero-Olazaran M AD - Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Col Mitras Ctr, Monterrey 64460, NL, MexicoServ Salud Nuevo Leon, Lab Estatal Salud Publ, Nuevo Leon, GuadeloupeViader-Salvado, JM, Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Col Mitras Ctr, Av Madero & Dr E Aguirre Pequeno, Monterrey 64460, NL, Mexico TI - Mycolic acid index susceptibility method for Mycobacterium tuberculosis AB - A rapid drug susceptibility test to measure the susceptibility of Mycobacterium tuberculosis to isoniazid (INH) and rifampin (RIF) using clinical isolates and a newly defined mycolic acid index (MAI) was evaluated, A total of 200 clinical isolates of M. tuberculosis were tested for susceptibility or resistance to INH and RIF by the MAI susceptibility and indirect-proportion methods. Overall, there was agreement between the two methods for 398 (99.5%) of the 400 total tests, Specifically, the sensitivity of the MAI susceptibility method for INH and RIF was 97.6 and 100%, respectively. The specificity and positive predictive value were 100% for both drugs, and the negative predictive value for INH and RIF was 98.3 and 100%, respectively. In conclusion, the MAI susceptibility method described here can be used for rapid drug susceptibility testing of M, tuberculosis clinical isolates within 5 days after clinical isolates are incubated in the presence or absence of an antituberculosis drug MH - Guadeloupe MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000169586400043 L2 - PERFORMANCE LIQUID-CHROMATOGRAPHY; DRUG SUSCEPTIBILITY; IDENTIFICATION; PATTERN SO - Journal of Clinical Microbiology 2001 ;39(7):2642-2645 4534 UI - 14308 AU - Victoria A AU - Mora G AU - Arias F AD - Toledo Hosp, Ctr Womens Hlth, Div Maternal Fetal Med, Toledo, OH 43606, USAFdn Valle de Lili, Dept Obstet & Gynecol, Cali, ColombiaHosp San Luis Potosi, Dept Obstet & Gynecol, San Luis Potosi, MexicoArias, F, Toledo Hosp, Ctr Womens Hlth, Div Maternal Fetal Med, Toledo, OH 43606 USA TI - Perinatal outcome, placental pathology, and severity of discordance in monochorionic and dichorionic twins AB - Objective: To evaluate differences in pregnancy outcomes and placental findings among severely discordant monochorionic and dichorionic twins. Methods: We studied retrospectively a cohort of 382 twin pregnancies with gestational ages that ranged from 24 to 40 weeks. Pregnancies were classified as dichorionic or monochorionic by histologic examination of placentas. Infants were subdivided into concordant (less than 5% difference in birth weight), mildly discordant (5-25% difference), and severely discordant groups (more than 25% difference), and their clinical characteristics and findings at placental examination were analyzed and compared. Results: Severe discordance occurred significantly more often in monochorionic than in dichorionic twins and was associated with significantly more deliveries before 36 weeks and more newborns remaining more than 10 days in the neonatal intensive care unit. Severely discordant monochorionic and dichorionic twins had significantly worse perinatal mortality and morbidity than mildly discordant and concordant twins. The weight of the placenta of the smaller fetus in severely discordant dichorionic twins with separate placentas and the total placental weight in severely discordant monochorionic twins were significantly smaller than the weights of the placentas in their concordant and mildly discordant counterparts. The umbilical cords of the smaller fetuses in both dichorionic and monochorionic pregnancies exhibited significantly more velamentous insertions and single umbilical arteries than in concordant or mildly discordant twins of similar chorionicity. Conclusion: Severe discordance is more frequent and has greater morbidity in monochorionic than dichorionic twins. The most frequent findings in the placentas of severely discordant twins were small placental weight and umbilical cord abnormalities. (Obstet Gynecol 2001;97:310-5. (C) 2001 by The American College of Obstetricians and Gynecologists.) MH - Colombia MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 54 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0029-7844 UR - ISI:000166910500027 L2 - BIRTH-WEIGHT-DISCORDANCE; PREGNANCIES; GROWTH; CHORIONICITY; RETARDATION; MORTALITY SO - Obstetrics and Gynecology 2001 ;97(2):310-315 4535 UI - 14417 AU - Vidal-Martinez VM AU - Scholz T AU - guirre-Macedo ML AD - IPN, CINVESTAV, Parasitol Lab, Unidad Merida, Merida, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicVidal-Martinez, VM, IPN, CINVESTAV, Parasitol Lab, Unidad Merida, Carretera Antigua & Progr Km 6,AP 73 Cordemex, Merida, Yucatan, Mexico TI - Dactylogyridae of cichlid fishes from Nicaragua, Central America, with descriptions of Gussevia herotilapiae sp n. and three new species of Sciadicleithrum (Monogenea : Ancyrocephalinae) AB - Gussevia herotilapiae sp. n., Sciadicleithrum maculicadae sp. n., Sciadicleithrum nicaraguense sp. n., and Sciadicleithrum bicuense sp. n. are described from Herotilapia multispinosa, Cichlasoma maculicauda, Amphilophus alfari, and Archocentrus nigrofasciatus (Pisces: Cichlidae), respectively, from the Atlantic coast of Nicaragua. Sciadicleithrum mexicanum and Sciadicleithrum meekii, originally described in Mexico, are recorded for the first time in Nicaragua. The morphology of these species of Sciadicleithrum is similar to that of their congeners in southeastern Mexico, and it is suggested that both cichlids and their monogeneans speciated in Central America and subsequently dispersed to southeastern Mexico. Gussevia, originally described from South American cichlids, is recorded for the first time in Central America MH - Czech Republic MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 13 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000166713900008 L2 - Monogenea;Dactylogyridae;new species;taxonomy;Gussevia;Sciadicleithrum;fishes;Cichlidae;Nicaragua;Central America;NEOTROPICAL MONOGENEA; YUCATAN PENINSULA; GILLS SO - Comparative Parasitology 2001 ;68(1):76-86 4536 UI - 10993 AU - Vidal-Quintanar RL AU - Love JA AU - Johnson LA AD - Univ Sonora, Dept Invest & Postgrado Alimentos, Hermosillo 83000, Sonora, MexicoIowa State Univ Sci & Technol, Dept Food Sci & Human Nutr, Ames, IA 50011, USAVidal-Quintanar, RL, Univ Sonora, Dept Invest & Postgrado Alimentos, Apartado Postal 1658, Hermosillo 83000, Sonora, Mexico TI - Note. Effect of nixtamal degermination on some physical properties of corn masa and on sensory characteristics of corn tortillas AB - Laboratory-made. whole and degermed corn masa flours (DCM) at 50 and 100% levels were prepared to determine the effects of germs on physical properties and sensory characteristics of masa and corn tortillas. DCM flours were finer in particle size than whole dry masa flour. Whiteness of dry masa flours, calculated as total color difference, increased with degerming. Removal of germs did not modify the dough adhesiveness or the rollability and typical flavor of corn tortillas. The 100% degermed tortillas were significantly more chewy and firm than the whole nixtamal tortilla based on sensory evaluation, Therefore, nixtamal degermination could not be considered as a process to reduce off-odors of stored corn masas MH - Mexico|Sonora MH - USA PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1082-0132 UR - ISI:000175957200008 L2 - nixtamal;degermination;corn;tortillas;sensory analysis;FLOURS SO - Food Science and Technology International 2001 ;7(4):363-367 4537 UI - 13983 AU - Vidales A AU - Benavides AL AU - Gil-Villegas A AD - Univ Guanajuato, Inst Fis, Leon 37150, SpainUniv Autonoma Zacatecas, Escuela Fis, Zacatecas, MexicoInst Mexicano Petr, Mol Simulat Program, Mexico City, DF, MexicoGil-Villegas, A, Univ Guanajuato, Inst Fis, Leon 37150, Spain TI - Perturbation theory for mixtures of discrete potential fluids AB - A thermodynamic perturbation theory for mixtures of fluids composed of particles interacting via discrete potentials is presented, based on previous work for pure component systems. Square-well and square-shoulder mixtures are accurately described by this theory, giving the necessary information for studying a wide range of discrete potential fluids. As an example of this, the theory is applied to a discrete Lennard-Jones mixture, obtaining very good results when compared against computer simulation values. The scope of this work is to implement perturbation theory for discrete potential systems in modern theories for complex fluids MH - Mexico|Distrito Federal MH - Mexico|Zacatecas MH - Spain PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 18 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000167880300003 L2 - SQUARE-WELL FLUID; VAPOR-LIQUID-EQUILIBRIUM; ANISOTROPIC-CHAIN THEORY; SAFT-VR APPROACH; PHASE-EQUILIBRIA; VARIABLE RANGE; ASSOCIATING MOLECULES; ELECTROLYTE-SOLUTIONS; EQUATION; STATE SO - Molecular Physics 2001 ;99(9):703-710 4538 UI - 13661 AU - Vidiella-Barranco A AU - revalo-Aguilar LM AU - Moya-Cessa H AD - Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilINAOE, Coordinac Opt, Puebla 72000, MexicoVidiella-Barranco, A, Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil TI - Analytical operator solution of master equations describing phase-sensitive processes AB - We present a method of solving master equations which may describe, in their most general form, phase sensitive processes such as decay and amplification. We make use of the superoperator technique MH - Brazil MH - Mexico|Puebla PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9792 UR - ISI:000168832500003 L2 - STATES SO - International Journal of Modern Physics B 2001 ;15(8):1127-1134 4539 UI - 14386 AU - Vidiella-Barranco A AU - Moya-Cessa H AD - Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilINAOE, Coodinac Opt, Puebla 72000, MexicoVidiella-Barranco, A, INAOE, Coodinac Opt, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - Nonextensive approach to decoherence in quantum mechanics AB - We propose a nonextensive generalization (q-parametrized) of the von Neumann equation for the density operator. Our model naturally leads to the phenomenon of decoherence, and unitary evolution is recovered in the: limit of q --> 1. The resulting evolution yields a nonexponential decay for quantum coherences, fact that might be attributed to nonextensivity. We discuss, as an example, the loss of coherence observed in trapped ions. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000166706700010 L2 - NONCLASSICAL MOTIONAL STATES; INTRINSIC DECOHERENCE; TSALLIS ENTROPY; SYSTEMS; ATOM; RECONSTRUCTION; ENTANGLEMENT; STATISTICS; ION SO - Physics Letters A 2001 ;279(1-2):56-60 4540 UI - 12242 AU - Vielle-Calzada JP AU - Baskar R AU - Grossniklaus U AD - Univ Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandCINVESTAV, Plant Biotechnol Unit, Irapuato, MexicoVielle-Calzada, JP, CINVESTAV, Plant Biotechnol Unit, Irapuato, Mexico TI - Seed development - Early paternal gene activity in Arabidopsis - Reply MH - Mexico|Guanajuato MH - Switzerland PB - LONDON: MACMILLAN PUBLISHERS LTD RP - NOT IN FILE U3 - TC 12 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0028-0836 UR - ISI:000172676200033 L2 - ENDOSPERM; EMBRYO SO - Nature 2001 ;414(6865):710-710 4541 UI - 12779 AU - Vigil-Galan O AU - Vaillant L AU - Mendoza-Perez R AU - Contreras-Puente G AU - Vidal-Larramendi J AU - Morales-Acevedo A AD - IPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City 07360, DF, MexicoInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana 43100, CubaMorales-Acevedo, A, IPN, CINVESTAV, Dept Ingn Elect, SEES, Ave IPN No 2508, Mexico City 07360, DF, Mexico TI - Influence of the growth conditions and postdeposition treatments upon the grain boundary barrier height of CdTe thin films deposited by close space vapor transport AB - CdTe thin films deposited by close space vapor transport (CSVT) under variable growth conditions and postthermal and chemical treatments were studied by means of photoconductivity measurements in the temperature range of 90-300 K. The influences of the deposition temperature gradient, the oxygen content in the growth chamber, and the CdCl2 treatment and chemical etching upon the intergrain barrier height of CSVT polycrystalline CdTe thin films were determined. The grain boundary barrier height (E-b phi) as a function of the intensity of the incident light was analyzed, and values of E-b phi under illumination of 100 mW/cm(2) (AM1) were obtained in each case. These results are important for improving CdS/CdTe solar cell performance in the near future. (C) 2001 American Institute of Physics MH - Cuba MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000171135900047 L2 - SOLAR-CELLS; PHOTOCONDUCTIVITY; SILICON; CDCL2 SO - Journal of Applied Physics 2001 ;90(7):3427-3431 4542 UI - 13794 AU - Vigil O AU - rias-Carbajal A AU - Cruz F AU - Contreras-Puente G AU - Zelaya-Angel O AD - IPN, Dept Fis, Ctr Invest & Estud Avanzados, Mexico City 07360, DF, MexicoUniv La Habana, IMRE, Fac Quim, La Habana 10400, CubaIPN, Escuela Fis & Matemat, Mexico City 07738, DF, MexicoZelaya-Angel, O, IPN, Dept Fis, Ctr Invest & Estud Avanzados, POB 14-740, Mexico City 07360, DF, Mexico TI - Modification of the properties of chemically deposited CdS thin films grown under magnetic field and variable growing parameters AB - CdS thin films were grown by chemical bath deposition (CBD) method on glass substrates under a constant magnetic field, at different deposition temperatures and thiourea concentrations. The optical, electrical and structural evolution as a function of the above mentioned parameters were characterized. A combination of deposition temperature and thiourea concentration was obtained with optimal result, i.e., that which produces the highest band-gap energy (BGE) and the smallest resistivity under the magnetic field. On the basis of the optical and structural characterization, we found that in the evolution of BGE, quantum confinements effects are present. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000168362700013 L2 - semiconductors;chemical synthesis;X-ray diffraction;electrical properties;SOLAR-CELL SO - Materials Research Bulletin 2001 ;36(3-4):521-530 4543 UI - 14394 AU - Vigil O AU - Cruz F AU - Morales-Acevedo A AU - Contreras-Puente G AU - Vaillant L AU - Santana G AD - IPN, CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Mexico City 07360, DF, MexicoInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv La Habana, IMRE, Fac Fis, Havana 43100, CubaMorales-Acevedo, A, IPN, CINVESTAV, Dept Ingn Elect, Secc Elect Estado Solido, Mexico City 07360, DF, Mexico TI - Structural and optical properties of annealed CdO thin films prepared by spray pyrolysis AB - CdO films were prepared on glass substrates by the spray pyrolysis technique. Results on structural, optical and electrical properties of the layers as a function of the thermal annealing are reported. XRD data indicates that samples show microstructural perfection improvement as a function of annealing time. The optical band-gap shows a dependence with the inverse of the squared crystallite size, suggesting that electron confinement is an important effect. The lattice parameter and band-gap energy of the samples annealed at 450 degreesC for 120 min correspond to the reported values of bulk CdO crystals. In addition, the electrical resistivity measurement shows a slight decrease when annealing time is increased up to 40 min but it saturates for larger times. (C) 2001 Elsevier Science B.V, All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000166685000037 L2 - optical properties;CdO thin films;spray pyrolysis;XRD analysis;ACTIVATED REACTIVE EVAPORATION; CADMIUM-OXIDE FILMS; ELECTRICAL-PROPERTIES; ZNO FILMS; CELL; LAYER; SHIFT SO - Materials Chemistry and Physics 2001 ;68(1-3):249-252 4544 UI - 14036 AU - Vigueras E AU - Feldman E AU - Yurchenko V AU - Gumen L AU - Krokhin A AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoDonetsk Engn Phys Inst, UA-340114 Donetsk, UkraineUniv Popular Autonoma Estado Puebla, Puebla 72160, MexicoUniv Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, EnglandKrokhin, A, Univ Autonoma Puebla, Inst Fis, Apdo Psot J-48, Puebla 72570, Mexico TI - Misfit dislocations in epitaxial heterostructures with different elastic constants of the substrate and epitaxial layer AB - We calculate the elastic energy of a heterostructure consisting of materials with different elastic moduli. In the framework of the continuous theory of elasticity we obtain an analytical solution for the elastic field of a periodic arrangement of screw misfit dislocations. This solution allows to calculate the critical thickness of the epitaxial layer (epilayer) and to analyse its dependence on the elastic contrast between the substrate and the epilayer. Analysis of the total elastic energy of the heterostructure shows that a transition from a pseudomorphic state to a state with misfit dislocations occurs similarly to either a first-order or a second-order phase transition. The type of transition that the system follows depends on the relation between the elastic moduli of the substrate and the epilayer MH - United Kingdom MH - Mexico|Puebla MH - Ukraine PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0141-8610 UR - ISI:000167679400009 L2 - SEMICONDUCTOR HETEROSTRUCTURES; COMPLIANT SUBSTRATE; CRITICAL THICKNESS; RELAXATION; CRYSTALS; DEFECTS; ENERGY; STRAIN SO - Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties 2001 ;81(3):667-681 4545 UI - 14442 AU - Vigueras E AU - Krokhin AA AU - McKrell TJ AU - Galligan JM AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Connecticut, Dept Met, Storrs, CT 06269, USAUniv Connecticut, Inst Mat Sci, Storrs, CT 06269, USAKrokhin, AA, Univ Autonoma Puebla, Inst Fis, Apdo Post J-48, Puebla 72570, Mexico TI - Broadening of the tilt-effect peak in the drag of dislocations in metals due to chaotic scattering of electrons AB - The electron drag force on a moving dislocation in a magnetic field H introduces a sharp maximum in the drag stress when H is parallel to the dislocation line (tilt-effect). The width of this maximum is proportional to the radius of the effective electron-dislocation interaction which, in linear theory, is of the order of the Burgers vector b. However, by using a nonlinear approach to this interaction we show that this width is much larger than in the linear case, and is given by the parameter (b/R)(1/3), where R is the cyclotron radius. The estimate for the width of the tilt-effect, obtained from the nonlinear approach, is in good agreement with the experimental results, unlike the width obtained from linear theory MH - Mexico|Puebla MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0141-8610 UR - ISI:000166480400011 L2 - LOW-TEMPERATURES SO - Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties 2001 ;81(1):137-144 4546 UI - 12611 AU - vila-Figueroa C AU - Martinez G AU - Nandi-Lozano E AU - Becerril R AU - Valencia R AU - Goldmann DA AU - Huskins CW AD - Minist Hlth, Mexico City, DF, MexicoIMSS, Durango, MexicoHosp Ninos Morelense, Cuernavaca, Morelos, MexicoDIFEM, Toluca, MexicoDIF, Hidalgo, MexicoChildrens Hosp, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA, USAMayo Clin, Rochester, MN, USA TI - Incidence of catheter-associated bloodstream infection among six NICU's in Mexico MH - Mexico|Distrito Federal MH - Mexico|Durango MH - Mexico|Hidalgo MH - Mexico|Morelos MH - Mexico|Estado De Mexico MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Meeting Abstract AV - English IS - 1058-4838 UR - ISI:000171226900313 SO - Clinical Infectious Diseases 2001 ;33(7):1137-1137 4547 UI - 12740 AU - vila-Reese V AU - Colin P AU - Valenzuela O AU - D'Onghia E AU - Firmani C AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoNew Mexico State Univ, Dept Astron, Las Cruces, NM 88003, USAUniv Milan, I-20100 Milan, ItalyAvila-Reese, V, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - Formation and structure of halos in a warm dark matter cosmology AB - Using high-resolution cosmological N-body simulations, we study how the density profiles of dark matter halos are affected by the filtering of the density power spectrum below a given scale length and by the introduction of a thermal velocity dispersion. In the warm dark matter (WDM) scenario, both the free-streaming scale, R-f, and the velocity dispersion, v(th)(w), are determined by the mass, m(W), of the WDM particle. We found that v(th)(w) is too small to affect the density profiles of WDM halos. Down to the resolution attained in our simulations (similar to0.01 virial radii), there is not any significant difference in the density profiles and concentrations of halos obtained in simulations with and without the inclusion of v(th)(w). Resolved soft cores appear only when we artificially increase the thermal velocity dispersion to a value that is much higher than v(th)(w). We show that the size of soft cores in a monolithic collapse is related to the tangential velocity dispersion. The density profiles of the studied halos with masses down to similar to0.01 the filtering mass M-f can be described by the Navarro-Frenk-White shape; soft cores are not formed. Nevertheless, the concentrations of these halos are lower than those of the CDM counterparts and are approximately independent of mass. The cosmogony of halos with masses less than or similar to M-f is not hierarchical: they form through monolithic collapse and by fragmentation of larger structures. The formation epoch of these halos is slightly later than that of halos with masses approximate to M-f. The lower concentrations of WDM halos with respect to their CDM counterparts can be accounted for by their late formation epoch. Overall, our results point to a series of advantages of a WDM model over the CDM one. In addition to solving the substructure problem, a WDM model with R-f similar to 0.16 Mpc (m(W) approximate to 0.75 keV; flat cosmology with Omega (Lambda) = h = 0.7) also predicts concentrations, a Tully-Fisher relation, and formation epochs for small halos, which seems to be in better agreement with observations than CDM predictions MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 53 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000171439800003 L2 - dark matter;galaxies : halos;HIERARCHICAL FORMATION SCENARIO; SURFACE BRIGHTNESS GALAXIES; TULLY-FISHER RELATION; LARGE-SCALE STRUCTURE; DENSITY PROFILES; ROTATION CURVES; DWARF GALAXIES; DISK GALAXIES; LINEAR POWER; UNIVERSE SO - Astrophysical Journal 2001 ;559(2):516-530 4548 UI - 13176 AU - vila-Sakar G AU - Krupnick GA AU - Stephenson AG AD - Penn State Univ, Dept Biol, University Pk, PA 16801, USAAvila-Sakar, G, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Ap Postal 70-275, Mexico City 04510, DF, Mexico TI - Growth and resource allocation in Cucurbita pepo ssp texana: Effects of fruit removal AB - Recent theory indicates that plants may be able to increase their fitness by adjusting the relative investment of resources in growth and reproduction, through the male or female function, in response to alterations in resource availability throughout the growing season. Fruit production has been shown to be costly to plants in terms of carbon and mineral nutrients that, otherwise, could be used for further growth, defense, or pollen production and dispersal. Consequently, the failure of flowers to initiate and/or produce mature fruits (e.g., because lack of pollination or flower predation) should free resources for growth, defense, and additional flower production. This prediction, however, assumes that plants have the physiological mechanisms to appropriately reallocate unused resources from the female function. This study examines whether plants of Cucurbita pepo ssp. texana reallocate resources from fruit/seed production to growth and flower production in response to the removal of pistillate flowers 1 d after anthesis. This wild gourd is an annual, monoecious vine that produces a single flower per reproductive node. We found that when plants were not permitted to allocate resources to fruit and seed production, the vines grew faster, initiated more staminate and pistillate flower buds, and produced more pistillate flowers but had a smaller proportion of staminate buds that reached anthesis and fewer staminate flowers on their main shoot than plants with fruit/seed production. These findings indicate that the resources that would have gone into fruit maturation were reallocated to growth and flower bud production. However, despite an increased investment in the production of staminate flower buds, a relative surplus of resources did not result in an increase in the production of staminate flowers. Recent findings concerning the physiology of sex expression in Cucurbita indicate that the failure of staminate flower buds to develop to anthesis results from an increase in the hormonal signal (ethylene) that stimulates pistillate flower development on vines without developing fruits MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Plant Sciences U5 - J;Article AV - English IS - 1058-5893 UR - ISI:000170186500010 L2 - Cucurbita pepo ssp texana;phenotypic plasticity;resource allocation;sex allocation;ADAPTIVE PLASTICITY HYPOTHESIS; IMPATIENS-CAPENSIS; INDUCED RESPONSES; FEMALE FUNCTIONS; SEX EXPRESSION; WILD RADISH; PLANTS; COSTS; HERBIVORY; CONSTRAINTS SO - International Journal of Plant Sciences 2001 ;162(5):1089-1095 4549 UI - 12144 AU - Vila NJ AU - Rosas JM AD - Univ Jaen, Dept Psicol, Jaen 23017, SpainUniv Nacl Autonoma Mexico, FES Iztacala, Tlalnepantla 54090, MexicoRosas, JM, Univ Jaen, Dept Psicol, Paraje Lagunillas S-n, Jaen 23017, Spain TI - Reinstatement of acquisition performance by the presentation of the outcome after extinction in causality judgments AB - Two experiments were conducted with the aim of exploring reinstatement after extinction using a causality judgment task in human beings. In Experiment 1, participants learned first that a fictitious medicine produced a side-effect. The medicine was then presented in extinction. Re-exposure to the side-effect by itself before the test reinstated acquisition performance. Reinstatement was greater when exposure took place in the test context than when it took place in a different context. Experiment 2 replicated reinstatement in a situation that ensured equivalent extinction for the different groups before the test. (C) 2001 Elsevier Science BN. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0376-6357 UR - ISI:000172869300002 L2 - causal learning;extinction;judgments;reinstatement;CONTEXT; RETRIEVAL; PARADIGMS; FEAR SO - Behavioural Processes 2001 ;56(3):147-154 4550 UI - 14380 AU - Vilazquez E AU - Martinez-Romero E AU - Rodriguez-Navarro DN AU - Trujillo ME AU - Daza A AU - Mateos PF AU - Martinez-Molina E AU - van Berkum P AD - Univ Salamanca, Dept Genet & Microbiol, Salamanca 37007, SpainCIDA, Seville, SpainUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoUSDA ARS, Soybean & Alfalfa Res Lab, Beltsville, MD 20705, USAVilazquez, E, Univ Salamanca, Dept Genet & Microbiol, Edificio Dept,Avda Campo Charro S-N, Salamanca 37007, Spain TI - Characterization of rhizobial isolates of Phaseolus vulgaris by staircase electrophoresis of low-molecular-weight RNA AB - Low-molecular-weight (LMW) RNA molecules were analyzed to characterize rhizobial isolates that nodulate the common bean growing in Spain. Since LMW RNA profiles, determined by staircase electrophoresis, varied across the rhizobial species nodulating beans, we demonstrated that bean isolates recovered from Spanish soils presumptively could be characterized as Rhizobium etli, Rhizobium gallicum, Rhizobium giardinii, Rhizobium leguminosarum by. viciae and by. trifolii, and Sinorhizobium fredii MH - Mexico|Morelos MH - Spain MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000166844600074 L2 - SP. NOV.; PROFILES; ETLI; GENOTYPES; GALLICUM; NODULATE; TROPICI SO - Applied and Environmental Microbiology 2001 ;67(2):1008-1010 4551 UI - 13789 AU - Villa F AU - Lopez-Rios T AU - Regalado LE AD - Ctr Invest Opt, Leon, Gtp, MexicoCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, FranceVilla, F, Ctr Invest Opt, Loma Bosque 115,Lomas Campestre 37150,Apdo Pos, Leon, Gtp, Mexico TI - Electromagnetic modes in metal-insulator-metal structures AB - Metal-dielectric-metal structures are constructed by depositing Ag films on CaF2 thin films that coat Ag surfaces. The reflectance of such structures was measured for several angles of incidence in the 1-5-eV spectral range. The minima observed in the reflectance are due to the excitation of electromagnetic modes inside an optical cavity. These observed electromagnetic modes are discussed and compared to computed dispersion MH - France MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000168343400022 L2 - TUNNEL-JUNCTIONS; LIGHT-EMISSION SO - Physical Review B 2001 ;63(16):art-165103 4552 UI - 14355 AU - Villa M AU - Smeyers NJ AU - Senent ML AU - Smeyers YG AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoSmeyers, YG, CSIC, Inst Estructura Mat, Serrano 123, E-28006 Madrid, Spain TI - An ab initio structural study of some derivatives of ibuprofen as possible anti-inflammatory agents AB - Semi-empirical conformational calculations for the acidic moiety of some or-derivatives of ibuprofen, as well as NMR measurements permited to stand that the conformation angle of the propionic side chain was an important factor for the antiinflammatory activity (J. Pharm. Sci., 78 (1989) 764). In the same way, deprotonation energy was seen to be another important factor. In order to verify these assumptions, ab initio calculations are performed in this paper on a series of five or-derivatives and results compared with the semi-empirical ones, the NMR measurements and the anti-inflammatory activities. It is seen that the coplanarity factor is not any more a descriptor for the anti-inflammatory activity, and could be replaced by the barrier height to the propionic moiety rotation, when the deprotonation energy criterion is still preserved. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000166838200029 L2 - alpha-arylpropionic acids;ibuprofen;anti-inflammatory agents;ANTIINFLAMMATORY AGENTS; ACIDS SO - Journal of Molecular Structure-Theochem 2001 ;537():265-269 4553 UI - 14588 AU - Villalon CM AU - Sanchez-Lopez A AU - Centurion D AU - Saxena PR AD - IPN, CINVESTAV, Dept Farmacol, Mexico City, DF, MexicoErasmus Univ, Fac Med & Hlth Sci, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacol, Czda de los Tenorios 235,Col Granjas Coapa, Mexico City, DF, Mexico TI - Unravelling the pharmacological profile of the canine external carotid vasodilator '5-HT1-like" receptors: coexistence of sympatho-inhibitory 5-HT1B and postjunctional 5-HT7 receptors AB - It has been suggested that the external carotid vasodilatation produced by serotonin (5-hydroxytryptamine; 5-HT) in anaesthetised dogs with intact vagosympathetic trunks is mediated by sympatho-inhibitory '5-HT1D' receptors and musculotropic '5-HT1-like' receptors. The present study has re-analysed this suggestion with regard to the classification schemes recently proposed by the NC-IUPHAR subcommittee on 5-HT receptors. In pentobarbital-anaesthetised dogs with intact vagosympathetic trunks, 1-min intracarotid (i.c.) infusions of 5-carboxamidotryptamine (5-CT; 0.01-0.3 mug/min), 5-HT (0.3-30 mug/min), 5-methoxytryptamine (5-MeO-T; 1-100 mug/min) or sumatriptan (1-100 mug/min) dose-dependently increased the external carotid blood flow without affecting blood pressure or heart rate. The selective 5-HT1D receptor agonist, PNU-142633 (1-1000 mug/min), was essentially inactive. After mesulergine (300 mug/kg, i.v.), an antagonist at cardiovascular 5-HT7 receptors, the above responses to 5-HT, 5-CT and 5-MeO-T were blocked, whilst those to sumatriptan remained unaffected. In contrast, after the 5-HT1B/1D receptor antagonist, GR127935 (10 mug/kg, i.v.), the responses to 5-MT, 5-CT and 5-MeO-T were not affected, but those to sumatriptan were abolished. Furthermore, after the selective 5-HT1B receptor antagonist, SB224289 (300 mug/kg, i.v.), the responses to 5-MT, 5-CT and 5-MeO-T were significantly enhanced, whereas those to sumatriptan were abolished. Interestingly, the responses to all these agonists remained unmodified after the selective 5-HT1D receptor antagonist, BRL15572 (300 mug/kg, i.v.). The above results suggest that the '5-HT1-like' receptors, which mediate canine external carotid vasodilatation, display the pharmacological profile of sympatho-inhibitory 5-HT1B receptors and musculotropic 5-HT7 receptors, and confirm the existence of vasoconstrictor 5-HT1B receptors MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000166057600011 L2 - 5-HT1B receptor;5-HT7 receptor;BRL15572;canine external carotid vasodilatation;mesulergine;SB224289;sumatriptan;PNU-142633;VAGOSYMPATHECTOMIZED DOGS; CLOSE RESEMBLANCE; BLOOD-FLOW; 5-HYDROXYTRYPTAMINE; VASOCONSTRICTION; RESPONSES; SEROTONIN; INCREASE; SUBTYPE; PIG SO - Naunyn-Schmiedebergs Archives of Pharmacology 2001 ;363(1):73-80 4554 UI - 12349 AU - Villalpando S AU - Del Prado M AU - Lance A AU - Alfonso E AU - Rodriguez M AU - Demmelmair H AU - Koletzko B AD - Hosp Pediat Mexico City, Unidad Invest Nutr, CMN, Inst Mexicano Seguro Social, Mexico City, DF, MexicoUniv Munich, Dr Von Haunerschen Kinderspital, Klinderklin, D-80337 Munich, GermanyUniv Munich, Dr Von Haunerschen Kinderspital, Kinderpoliklin, D-80337 Munich, GermanyVillalpando, S, Apartado Postal 7-1069, Mexico City 06700, DF, Mexico TI - [C-13]linoleic acid oxidation and transfer into milk in stunted lactating women with contrasting body mass indexes AB - Background: The fat concentration of human milk is associated with maternal adiposity, but there is no clear understanding of the mechanisms controlling milk fat concentration. Objective: We evaluated the effect of postpartum body mass index (BMI; in kg/m(2)) on the metabolic distribution of an oral dose of [C-13]linoleic acid in lactating women. Design: Ten lactating women stratified by BMI (either < 22.5 or > 23.5) at 5 mo postpartum received orally 2.5 mg [C-13]linoleic acid/kg body wt. Exhaled air, milk, and plasma samples were collected in relation to tracer administration. Linoleic acid was determined by gas chromatography. Dietary intake, serum, milk composition, [C-13]linoleic acid enrichment in milk and plasma, and exhaled (CO2)-C-13 (by isotope ratio mass spectrometry) were assessed. Results: Women with a higher BMI exhaled more (CO2)-C-13, than did women with a lower BMI (22.8 +/- 9.4% compared with 8.6 +/- 3.5% of dose, P < 0.03). Cumulated 72-h transfer of [C-13]linoleic acid to milk was not significantly different between groups (14.8 +/- 6.5% compared with 17.7 +/- 6.7% of dose). Within the first 9 h after dose administration, 51.6 +/- 4.9% of the total isotope transfer into milk had passed in women with a higher BMI, but only 24.0 +/- 15.3% had passed in those with a lower BMI (P = 0.02). Conclusions: Women with a lower BMI, who were reputed as having less body fat, oxidized and secreted into milk less dietary linoleic acid within 12 h after tracer administration than did women with a higher BMI. In both groups, a large proportion of [C-13]linoleic was retained in the maternal compartment, most likely fat tissue, in a slow turnover pool, and released slowly in later hours MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 2 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000172328600019 L2 - [C-13]linoleic acid;human milk;lactation;milk fat;isotope ratio mass spectrometry;body mass index;BMI;body fat;stunted;Mexico;LIPOPROTEIN-LIPASE; MAMMARY-GLAND; PERFORMANCE; MESOAMERINDIANS; ENERGY; FAT; PROTEIN SO - American Journal of Clinical Nutrition 2001 ;74(6):827-832 4555 UI - 11839 AU - Villanueva-Novelo C AU - Celikovsky S AU - Castillo-Toledo B AD - Univ Autonoma Yucatan, Fac Matemat, Merida, Yucatan, MexicoAcad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague 8, Czech RepublicIPN, Ctr Invest & Estudios Avanzados, Unidad Guadalajara, Guadalajara 44550, Jalisco, MexicoVillanueva-Novelo, C, Univ Autonoma Yucatan, Fac Matemat, C 8 S-N X 21, Merida, Yucatan, Mexico TI - Structurally stable design of output regulation for a class of nonlinear systems AB - The problem of output regulation of the systems affected by unknown constant parameters is considered here. The main goal is to find a unique feedback compensator (independent on the actual values of unknown parameters) that drives a given error (control criterion) asymptotically to zero for all values of parameters from a certain neighbourhood of their nominal value. Such a task is usually referred to as the structurally stable output regulation problem. Under certain assumptions, such a problem is known to be solvable using dynamical error feedback. The corresponding necessary and sufficient conditions basically include the solvability of the so-called regulator equation and the existence of an immersion of a certain system with outputs into the one having favourable observability and controllability properties. Its model is then directly used for dynamic compensator construction. Usually, such an immersion may be selected as the one to an observable linear system with outputs. In a general case, the above mentioned conditions are highly nonconstructive and difficult to check. This paper studies a certain particular class of systems, the so-called strictly triangular polynomial systems, where that immersion to a linear system can be obtained in a constructive way. Moreover, it provides computer algorithm (based on MAPLE symbolic package) to design the corresponding solution to the structurally stable output regulation problem. Examples together with computer simulations are included to clarify the suggested approach MH - Czech Republic MH - Mexico|Jalisco MH - Mexico|Yucatan PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000173656200002 SO - Kybernetika 2001 ;37(5):547-564 4556 UI - 12114 AU - Villar-Martin M AU - De Young D AU - onso-Herrero A AU - Allen M AU - Binette L AD - Univ Hertfordshire, Dept Nat Sci, Hatfield AL10 9AB, Herts, EnglandNatl Opt Astron Observ, Tucson, AZ 85726, USASpace Telescope Sci Inst, Baltimore, MD 21218, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoVillar-Martin, M, Univ Hertfordshire, Dept Nat Sci, Coll Lane, Hatfield AL10 9AB, Herts, England TI - Shocks and dust survival in nearby active galaxies: implications for the alignment effect AB - One of the most popular explanations for the so-called alignment effect in high-redshift (z > 0.7) radio galaxies is the scattering by dust of the hidden quasar light. As shown by De Young, a problem with the dust scattering model is that the short destruction time-scale for dust grains means that they will not survive the passage of the radio jet. We investigate the survival of dust in the extended ionized gas of nearby active galaxies with jet-gas interactions. We discuss the implications on the alignment effect of high-redshift (greater than or equal to0.7) radio galaxies. We conclude that although shocks are likely to destroy dust grains in regions of interaction. dust might survive in great enough quantities to scatter light from the active nucleus and produce alignment between scattered light and the radio structures. We propose an observational test to investigate the existence of dust in shocked regions based on the sensitivity of calcium to depletion in the dust grains MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000172925600017 L2 - galaxies : active;galaxies : individual : NGC 1068;galaxies : individual : PKS 2152-69;galaxies : ISM;galaxies : jets;REDSHIFT RADIO GALAXIES; LARGE-SCALE NEBULOSITIES; OPTICAL-PROPERTIES; CA DEPLETION; INTERSTELLAR; EMISSION; NGC-1068; CLOUD; GAS; RADIOGALAXIES SO - Monthly Notices of the Royal Astronomical Society 2001 ;328(3):848-854 4557 UI - 13708 AU - Villar J AU - Ba'aqeel H AU - Piaggio G AU - Lumbiganon P AU - Belizan JM AU - Farnot U AU - Al-Mazrou Y AU - Carroli G AU - Pinol A AU - Donner A AU - Langer A AU - Nigenda G AU - Mugford M AU - Fox-Rushby J AU - Hutton G AU - Bergsjo P AU - Bakketeig L AU - Berendes H AD - WHO, Dept Reprod Hlth & Res, UNDP,UNFPA, World Bank Special Programme Res Dev & Res Traini, CH-1211 Geneva 27, SwitzerlandNatl Guard King Khalid Hosp, Jeddah, Saudi ArabiaKhon Kaen Univ, Khon Kaen, ThailandCtr Rosarino Estudios Perinatales, Rosario, Santa Fe, ArgentinaHosp Ginecoobstet Amer Arias, Havana, CubaMinist Hlth, Riyadh, Saudi ArabiaUniv Western Ontario, London, ON, CanadaPopulat Council, Off Latin Amer & Caribbean, Mexico City, DF, MexicoInst Nacl Salud Publ, Ctr Invest Sistemas Salud, Mexico City, DF, MexicoUniv E Anglia, Sch Hlth Policy & Practice, Norwich NR4 7TJ, Norfolk, EnglandLondon Sch Hyg & Trop Med, Hlth Policy Unit, London WC1, EnglandUniv Bergen, Dept Obstet & Gynaecol, Bergen, NorwayNatl Publ Hlth Inst, Oslo, NorwayNICHHD, NIH, Bethesda, MD 20892, USAVillar, J, WHO, Dept Reprod Hlth & Res, UNDP,UNFPA, World Bank Special Programme Res Dev & Res Traini, CH-1211 Geneva 27, Switzerland TI - WHO antenatal care randomised trial for the evaluation of a new model of routine antenatal care AB - Background We undertook a multicentre randomised controlled trial that compared the standard model of antenatal care with a new model that emphasises actions known to be effective in improving maternal or neonatal outcomes and has fewer clinic visits. Methods Clinics in Argentina, Cuba, Saudi Arabia, and Thailand were randomly allocated to provide either the new model (27 clinics) or the standard model currently in use (26 clinics). All women presenting for antenatal care at these clinics over an average of 18 months were enrolled. Women enrolled in clinics offering the new model were classified on the basis of history of obstetric and clinical conditions. Those who did not require further specific assessment or treatment were offered the basic component of the new model, and those deemed at higher risk received the usual care for their conditions; however, all were included in the new-model group for the analyses, which were by intention to treat. The primary outcomes were low birthweight (<2500 g), pre-eclampsia/eclampsia, severe postpartum anaemia (<90 g/L haemoglobin), and treated urinary-tract infection. There was an assessment of quality of care and an economic evaluation. Findings Women attending clinics assigned the new model (n = 12 568) had a median of five visits compared with eight within the standard model (n = 11 958). More women in the new model than in the standard model were referred to higher levels of care (13.4% vs 7.3%), but rates of hospital admission, diagnosis, and length of stay were similar. The groups had similar rates of low birthweight (new model 7.68% vs standard model 7.14%; stratified rate difference 0.96 [95% CI -0.01 to 1.92]), postpartum anaemia (7.59% vs 8.67%; 0.32), and urinary-tract infection (5.95% vs 7.41%; -0.42 [-1.65 to 0.80]). For pre-eclampsia/eclampsia the rate was slightly higher in the new model (1.69% vs 1.38%; 0.21 [-0.25 to 0.67]). Adjustment by several confounding variables did not modify this pattern. There were negligible differences between groups for several secondary outcomes. Women and providers in both groups were, in general, satisfied with the care received, although some women assigned the new model expressed concern about the timing of visits. There was no cost increase, and in some settings the new model decreased cost. Interpretations Provision of routine antenatal care by the new model seems not to affect maternal and perinatal outcomes. It could be implemented without major resistance from women and providers and may reduce cost MH - Argentina MH - Canada MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal MH - Norway MH - Saudi Arabia MH - Switzerland MH - Thailand MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 72 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000168830100008 L2 - LOW-RISK WOMEN; ECONOMIC-EVALUATION; COLORECTAL-CANCER; SCIENTIFIC BASIS; CLINICAL-TRIALS; PRENATAL-CARE; VISITS; DESIGN; POWER; ELIMINATE SO - Lancet 2001 ;357(9268):1551-1564 4558 UI - 13190 AU - Villarreal ML AU - Rojas G AU - Quintero R AU - Miranda E AU - Enriquez R AU - Leon I AU - Reynolds W AD - UAEM, Ctr Invest Biotecnol, Cuernavaca, Morelos, MexicoCtr Invest Biomed Sur IMSS Argentina 1, Xochitepec, Morelos, MexicoUNAM, Inst Quim, Mexico City, DF, MexicoUAEM, Ctr Invest Quim, Cuernavaca, Morelos, MexicoUniv Toronto, Dept Chem, Toronto, ON M5S 1A1, CanadaVillarreal, ML, UAEM, Ctr Invest Biotecnol, Cuernavaca, Morelos, Mexico TI - In vitro culture of Montanoa tomentosa for the production of diterpenic acids AB - Following a solid phase extraction, GC-MS and GC-FID procedures, the production of three kaurane derivatives (grandiflorenic, kaurenoic and monoginoic acids) was detected in callus and cell suspension batch cultures of Montanoa tomentosa. From different hormonal combinations, the addition of 0.5 mg 2,4-dichlorophenoxyacetic acid l(-1) + 2 mg kinetin l(-1) increased the accumulation of total kaurenoids in 6 months old calluses to 2.1 mg g(-1) dry weight and in cell suspensions cultures up to 0.76 mg g(-1) dry weight. Monoginoic acid, which has not been detected before in leaves of wild plants, accumulated in both in vitro systems MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000170160200002 L2 - grandiflorenic acid;in vitro cultures;kaurenoic acid;monoginoic acid;Montanoa tomentosa;ZOAPATLE; H-1 SO - Biotechnology Letters 2001 ;23(16):1279-1284 4559 UI - 12052 AU - Villasenor R AU - Claiborn C AU - Lamb B AU - O'Neill S AD - Washington State Univ, Dept Civil & Environm Engn, Lab Atmospher Res, Pullman, WA 99164, USAVillasenor, R, Inst Mexicano Petr, PIMAS, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Mesoscale modeling of wintertime particulate matter episodes in eastern Washington, USA AB - The Spokane, Washington area is classified as a non-attainment area for the 24-h PM10 standard due to a history of high particulate matter concentrations. A Eulerian regional air quality model (CALMET/CALGRID) has been used to characterize the emission, transport and dispersion of PM10 and PM2.5 in Spokane. Observations from a residential site (Rockwood, RW) and an industrial site (Crown Zellerbach, CZ), spanning July 1994-August 1996 were used to evaluate the current emission inventory. Two major tasks were devised to conduct the objectives of this investigation. First, a simple and efficient urban dispersion model (WYNDValley) was used to simulate important episodes characterized by the highest PM10 and PM2.5 Concentrations. The selected episodes included four days with wet conditions for which no roads would have been emitting and seven days with dry conditions for which roads would emit. In the second step, a single road-emitting event was selected from the previous predicted results for further analysis using the Eulerian regional air quality model to examine the emission inventory. The urban and regional models predicted the observed concentration distributions reasonably well for the source emissions inventoried in Spokane. The mass concentrations of PM10 were well predicted for the roads emitting case examined by both models indicating that the emission inventory based primarily upon area sources including roads is reasonably well characterized, at least at the RW site. The area sources around CZ are less well characterized, so that the PM10 concentrations are underpredicted at CZ. The models appear unable to reach an equilibrium mass balance status at the beginning of the simulation, and the urban model seems unable to properly resolve the nocturnal boundary layer. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000173052300021 L2 - air quality modeling;meteorology;emission inventory;emission factors;fugitive dust emissions SO - Atmospheric Environment 2001 ;35(36):6479-6491 4560 UI - 11874 AU - Villecco MB AU - Hernandez LR AU - Guzman MI AU - Catalan CAN AU - Bucio MA AU - Joseph-Nathan P AD - Univ Nacl Tucuman, Inst Quim Organ, Fac Bioquim Quim & Farm, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoCatalan, CAN, Univ Nacl Tucuman, Inst Quim Organ, Fac Bioquim Quim & Farm, Ayacucho 471, RA-4000 San Miguel De Tucuman, Tucuman, Argentina TI - Synthesis, stereochemistry and absolute configuration of deodarols and deodarones AB - The stereochemistry and absolute configuration of the four deodarols and two deodarones derived from R-(+)-limonene is described. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000173484900006 L2 - SESQUITERPENES; LOUD; WOOD SO - Tetrahedron-Asymmetry 2001 ;12(21):2947-2953 4561 UI - 12664 AU - Villegas H AU - Merker HJ AU - Helling K AU - Clarke AH AU - Scherer H AD - Free Univ Berlin, Inst Anat, D-14195 Berlin, GermanyNatl Inst Orthopaed & Rehabil, Mexico City, DF, MexicoFree Univ Berlin, Benjamin Franklin Med Ctr, ENT Dept, D-1000 Berlin, GermanyMerker, HJ, Free Univ Berlin, Inst Anat, Konigin Luise Str 15, D-14195 Berlin, Germany TI - Electron microscopic studies of ion- and H2O-transporting epithelial cells in the horizontal ampulla of the pigeon AB - Earlier morphological studies of the epithelial structure in the semicircular canals of mammals have focused on the sensory cells of the crista ampullaris. This report draws attention to the fact that there exist at least seven further cell types in the horizontal ampulla walls of pigeon with various functions; the role of ion- and H2O-transporting epithelial cells is dealt with here in detail. While the dark cells appear to play a decisive role in the regulation of ionic composition, the cells in the planum semilunatum may transport H2O and assist in the regulation of endolymph volume. In addition, protein-secreting structures are located in the apical region of the cells of the planum semilunatum. The question whether the proteins are dispersed in the endolymph or contribute to cupula formation remains unclear. The morphology and possible functions of these two cell types are discussed on the basis of electron microscopic results MH - Germany MH - Mexico|Distrito Federal PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology;Pathology U5 - J;Article AV - English IS - 0213-3911 UR - ISI:000171553900020 L2 - ampulla;planum semilunatum;dark cells;pigeon;electron microscopy;GERBIL INNER-EAR; VESTIBULAR DARK CELLS; BETA-SUBUNIT ISOFORMS; IMMUNOHISTOCHEMICAL LOCALIZATION; CARBONIC-ANHYDRASE; ALPHA-SUBUNIT; TRANSPORT; MEMBRANE; NA+,K+-ATPASE; NA,K-ATPASE SO - Histology and Histopathology 2001 ;16(4):1161-1174 4562 UI - 12979 AU - Villegas J AU - Fortin JA AD - Univ Montreal, Inst Rech Biol Vegetale, Montreal, PQ H1X 2B2, CanadaVillegas, J, UNICACH, Escuela Biol, 1 Sur Poniente 1460, Tuxtla Gutierrez 29000, Chiapas, Mexico TI - Phosphorus solubilization and pH changes as a result of the interactions between soil bacteria and arbuscular mycorrhizal fungi on a medium containing NH4+ as nitrogen source AB - This paper reports the effects of Glomus intraradices (Schenck & Smith) external mycelium, mycorrhizal, and nonmycorrhizal transformed carrot roots (alone or in interaction with Pseudomonas aeruginosa (Schroeter) Migula, Pseudomonas putida (Trevisan) Migula, or Serratia plymuthica (Dyar) Bergey et al.) on phosphorus solubilization and pH changes of the medium. All experiments were conducted in a two-compartment Petri plate system with a NH4+ medium containing an insoluble source of phosphorus (P). In interaction with P. aeruginosa, G. intraradices mycorrhizal roots and G. intraradices external mycelium enhanced solubilization of sparingly soluble sources of phosphates above the levels reached with each culture alone. These improvements were correlated with changes in the pH of the media MH - Canada MH - Mexico|Chiapas PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 0008-4026 UR - ISI:000170705600001 L2 - Glomus intraradices;P solubilization;external mycelium;Pseudomonas aeruginosa;Pseudomonas putida;Serratia plymuthica;GLOMUS INTRARADICES; TRANSFORMED ROOTS; ROCK PHOSPHATE; PLANTS; GROWTH; MICROORGANISMS; RHIZOBACTERIA; SYSTEM SO - Canadian Journal of Botany-Revue Canadienne de Botanique 2001 ;79(8):865-870 4563 UI - 11599 AU - Vlasova MV AU - Kakazey NG AU - Gonzales-Rodriguez JG AU - Mondragon JJS AU - Prilutskii EV AU - Tomila TM AU - Isaeva LP AU - Timofeeva II AU - Bukov AI AU - Gordienko SP AD - UAEM, Ctr Res Engn & Appl Sci, Cuernavaca, Morelos, MexicoNatl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, UkraineVlasova, MV, UAEM, Ctr Res Engn & Appl Sci, Cuernavaca, Morelos, Mexico TI - Formation of composite powders and ceramics from beta-SiC-(CrO3)-O-2-C mixtures AB - The phase-formation process in the disperse beta-SiC + SiO2 + Cr2O3 + C system treated in vacuum at 1273, 1473, 1673, and 1873 K was studied by X-ray phase analysis, IR spectroscopy, EPR, and other methods. It was found that at treatment temperatures of 1273, 1473, and 1673 K, the major process is carbothermal reduction of Cr2O3 and SiO2 with the formation of chromium carbosilicide and chromium carbide (Cr3C2). At T = 1873 K, on the surface of the SiC particles, metastable chromium silicate forms on the base of SiO2 and Cr2O3. The reduction of Cr2SiO4 by silicon carbide is accompanied by the formation of CrSi2, Cr5Si3, and chromium carbosilicide. The phase composition of the products of interaction and their distribution over the volume of the composite powder and ceramic material are determined by the dispersion composition of the starting SiC powder and by the degree of development of reduction processes in local volumes of the disperse and compacted material MH - Mexico|Morelos MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1064-7562 UR - ISI:000174389000004 L2 - beta-SiC;Cr2O3;SiO2;C;interaction;silicide formation;CR-SI-C; SYSTEM; EQUILIBRIA; PARTICLES SO - Journal of Materials Synthesis and Processing 2001 ;9(4):187-197 4564 UI - 12034 AU - Vlasova MV AU - Lavrenko VA AU - Dyubova LY AU - Gonzalez-Rodriguez JG AU - Kakasey MG AD - UAEM, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca, Morelos, MexicoNatl Acad Sci Ukraine, Inst Problems Mat Sci, UA-252143 Kiev, UkraineGonzalez-Rodriguez, JG, UAEM, Ctr Invest Ingn & Ciencias Aplicadas, Av Univ 1001,Col Chamilpa, Cuernavaca, Morelos, Mexico TI - Nitriding of ferrosilicon powders AB - The process of nitriding of high-silicon ferrosilicon alloys has been investigated. Formation of Si3N4 is found to proceed as a result of nitrogen diffusion into several eutectic melts of iron silicides and silicon. At T > 1673, the process of Si3N4 dissociation develops MH - Mexico|Morelos MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1064-7562 UR - ISI:000173192300001 L2 - high-silicon ferrosilicon alloys;nitriding;silicon nitride;SILICON; NITRIDATION; MECHANISM; FE SO - Journal of Materials Synthesis and Processing 2001 ;9(3):111-117 4565 UI - 12778 AU - Vogt H AU - Buse K AU - Hesse H AU - Kratzig E AU - Garcia RR AD - Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, GermanyInst Nacl Astrofis Opt & Elect, Puebla, MexicoVogt, H, Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany TI - Growth and holographic characterization of nonstoichiometric sillenite-type crystals AB - We have grown Bi12GeO20 and Bi12SiO20 single crystals from melts with different GeO2 and SiO2 contents, respectively, to investigate the influence of an intrinsic defect, the antisite defect (Bi on Ge or Si site), on the light-induced charge transport. The optical absorption and the effective trap density of the crystals increase with decreasing GeO2 and SiO2 content in the melt. Furthermore, a variation of the photoconductivity is observed. Our results can be described by a one-center model with the antisite defect Bi3+/4+ on Ge or Si site as dominant photorefractive center. (C) 2001 American Institute of Physics MH - Germany MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000171135900005 L2 - BISMUTH SILICON-OXIDE; BI12SIO20 CRYSTALS; MAGNETIC-RESONANCE; BI12GEO20 CRYSTALS; ABSORPTION; TRANSPORT; STORAGE; DEFECT SO - Journal of Applied Physics 2001 ;90(7):3167-3173 4566 UI - 13936 AU - Voitsekhovich AV AU - Bara S AU - Mayor J AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Fac Fis, Dept Fis Aplicada, Area Opt, Santiago De Compostela 15706, Galicia, SpainVoitsekhovich, AV, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Calculation of minimum-variance estimators for Hartmann sensing using random wave vector simulations AB - The random wave vector approach (RWV) allows us to simulate phase samples with arbitrary statistics. In this paper we show how to apply this method to compute minimum variance estimators for Shack-Hartmann sensors dealing with the analysis of turbulence-distorted wavefronts. The RWV approach provides straightforward and closed-form expressions for the Zernike coefficients of the simulated phases as well as for the associated sensor measurements. A wide range of subpupil shapes, e.g. square, hexagonal, circular or polar, can be easily handled. Linear minimum mean square error estimators can be calculated from ensemble averages of those samples by a direct application of the Gauss-Markov theorem. These results are applied to the assessment of the efficiency of several Hartmann masks with different subpupil geometries MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 1464-4258 UR - ISI:000168027800005 L2 - wavefront sensing;adaptive optics;atmospheric optics;optimal estimation;Shack-Hartmann sensors;ADAPTIVE-OPTICS SYSTEMS; ATMOSPHERIC-TURBULENCE; ZERNIKE POLYNOMIALS; SCREEN GENERATOR; PHASE; PERFORMANCE; SENSORS; RECONSTRUCTION SO - Journal of Optics A-Pure and Applied Optics 2001 ;3(2):120-125 4567 UI - 13329 AU - Volkow P AU - Rubi S AU - Lizano M AU - Carrillo A AU - Vilar-Compte D AU - Garcia-Carranca A AU - Sotelo R AU - Garcia B AU - Sierra-Madero J AU - Mohar A AD - UNAM, Div Res, Inst Nacl Cancerol, Mexico City, DF, MexicoUNAM, Div Res, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUNAM, Inst Invest Biomed, Mexico City, DF, MexicoMohar, A, Stanford Univ, Sch Med, HRP, Redwood Bldg,Rm T225, Stanford, CA 94305 USA TI - High prevalence of oncogenic human papillomavirus in the genital tract of women with human immunodeficiency virus AB - Objective. The goal of this study was to determine the prevalence of human papillomavirus (HPV) and squamous intraepithelial lesions (SILs) in women infected with human immunodeficiency virus (HIV) in Mexico. Methods. Cases included women who were positive for human immunodeficiency virus (HIV) and accepted to participate. There were two control groups in this study: group A, heterosexual partners of HIV+ men; group B, commercial sex workers. Gynecologic examination was performed in all participants. Also, a cervical smear with colposcopy and a sample for detection of HPV DNA by polymerase chain reaction (PCR) were obtained in all subjects, as were CD4+ counts. Relative risks (RR) and 95% confidence interval were calculated. Results. Eighty-five HIV+ women agreed to participate in this study; the route of HIV infection was heterosexual in 78.88; transfusion in 8.2%; paid donors in 3.5%; and 9.4% unknown. A total of 9 controls were included: 4 from group A and 5 from group B, HPV DNA was detected by PCR in 57 (69%) cases and in 26 (29%) controls from both groups (P < 0.0001). The RR of HPV infection was 5.5 (2.7-11.5), Also, a significant difference in the prevalence of high-risk HPV types was observed between cases and controls, RR = 12.8 (4.07-42.9), These associations were independent of CD4+ counts and antiretroviral therapy. No association was observed between HIV infection and the risk for high-grade SIL. Conclusions. We observed a high prevalence of oncogenic HPV types in HIV-positive women, These women should be screened regularly for early diagnosis of premalignant lesions and prevention of cervical cancer. (C) 2001 Academic Press MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 9 U4 - Oncology;Obstetrics & Gynecology U5 - J;Article AV - English IS - 0090-8258 UR - ISI:000169824900007 L2 - human papillomavirus;human immunodeficiency virus;women;Mexico;HIV-INFECTED WOMEN; CERVICAL-CANCER; AFRICAN WOMEN; RISK-FACTORS; NEOPLASIA; EPIDEMIOLOGY; PROGRESSION; LESIONS; DISEASE SO - Gynecologic Oncology 2001 ;82(1):27-31 4568 UI - 13815 AU - Vollmer B AU - Cayatte V AU - van Driel W AU - Henning PA AU - Kraan-Korteweg RC AU - Balkowski C AU - Woudt PA AU - Duschl WJ AD - Observ Paris, DAEC, CNRS, UMR 8631, F-92195 Meudon, FranceUniv Paris 07, F-92195 Meudon, FranceUniv Heidelberg, Inst Theoret Astrophys, D-69121 Heidelberg, GermanyObserv Paris, Unite Sci Nancay, CNRS, USR 704B, F-92195 Meudon, FranceUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, Gto, MexicoUniv Cape Town, Dept Astron, ZA-7700 Rondebosch, South AfricaEuropean So Observ, D-85748 Garching, GermanyMax Planck Inst Radioastron, D-53121 Bonn, GermanyVollmer, B, Observ Paris, DAEC, CNRS, UMR 8631, F-92195 Meudon, France TI - HI deficiency in the galaxy cluster ACO 3627 - ATCA* observations in the Great Attractor region AB - ATCA 21 cm HI observations of the rich galaxy cluster ACO 3627; in the Great Attractor region ar e presented, Three fields of 30 ' diameter located;within one Abell radius uf ACO 3627 mere observed with a resolution of 15 " and an rms noise of similar to1 mJy/beam. Only two galaxies were detected in these fields. We compare their HI distribution to new optical R-band images and discuss their veIocity fields. The fil.st gnlasy is a gas-rich unperturbed spiral :whereas the second shows a peculiar HI distribution. The estimated 30 HI mass limit of our observations is similar to7 10(8) M circle dot for a line width of 150 km s(-1). The non-detection of a considerable number of luminous spiral galaxies indicates that the spiral galaxies are Iii deficient. The low detection rate is comparable to the HI deficient Coma cluster (Bravo-Alfaro et al. 2000). ACO 3627 is a bright X-ray cluster. We therefore suspect that ram pressure stripping is responsible for the Hr deficiency of the bright, cluster spirals MH - France MH - Germany MH - Mexico|Guanajuato MH - South Africa MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000168342600010 L2 - galaxies : interactions;galaxies : ISM;galaxies : kinematics and dynamics;NEUTRAL HYDROGEN; SPIRAL GALAXIES; MILKY-WAY; SOUTHERN; NEARBY; ABELL-3627; AVOIDANCE; BRIGHT; ZONE; GAS SO - Astronomy and Astrophysics 2001 ;369(2):432-440 4569 UI - 12999 AU - Volovichev IN AU - Villegas-Lelovsky L AU - de la Cruz GG AU - Gurevich YG AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, MexicoNatl Acad Sci Ukraine, Inst Radiophys & Elect, UA-310085 Kharkov, Ukrainede la Cruz, GG, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Legaria 694,Col Irrigac, Mexico City 11500, DF, Mexico TI - The effect of carrier diffusion and recombination in semiconductors on the photoacoustic signal AB - A quantitative derivation is presented for the heat transport in bipolar semiconductors, taking into account generation and heating of carriers on the surface due to an incident modulated laser beam on the surface and finite carrier diffusion and recombination in the solid. The temperature distribution as function of the position and time in the semiconductor is calculated using appropriate boundary conditions according to the photoacoustic experimental conditions. In addition. special emphasis is made on the heat power density generated in the sample due to the recombination of the electron-hole pair and the effect of the inhomogeneous temperature distribution on the thermal generation rate of carriers in the photoacoustic signal. (C) 2001 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000170591900052 L2 - recombination;non-equilibrium carriers;thermal waves SO - Physica B 2001 ;304(1-4):410-422 4570 UI - 14210 AU - Volovichev IN AU - Gurevich YG AD - Natl Acad Sci Ukraine, Inst Radioelect, UA-310085 Kharkov, UkraineInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoVolovichev, IN, Natl Acad Sci Ukraine, Inst Radioelect, UA-310085 Kharkov, Ukraine TI - Generation-recombination processes in semiconductors AB - A unified methodical approach to investigate the transport phenomena in semiconductors is formulated. Various recombination models used in studying the transport phenomena and the establishment of equilibrium in semiconductor structures are analyzed. New expressions describing the recombination processes under the steady-state conditions in arbitrary temperature fields are derived. The recombination process in the hot-carrier theory used when the temperatures of the charge carriers and phonons do not coincide was analyzed. Manifestations of the quasi-neutrality condition in thermodynamic equilibrium and transport phenomena are studied. (C) 2001 MAIK "Nauka / Interperiodica" MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7826 UR - ISI:000167247500009 SO - Semiconductors 2001 ;35(3):306-315 4571 UI - 13499 AU - Vygranenko Y AU - Malik A AU - Fernandes M AU - Schwarz R AU - Vieira M AD - ISEL, Elect & Commun Dept, P-1949014 Lisbon, PortugalINAOE, Dept Elect, Puebla, MexicoIST, Dept Phys, Lisbon, PortugalVygranenko, Y, ISEL, Elect & Commun Dept, P-1949014 Lisbon, Portugal TI - UV-visible ITO/GaP photodiodes: Characterization and modeling AB - The electrical and optical properties of the indium-tin-oxide (ITO)/n-n(+)GaP structure have been investigated. Current-voltage, capacitance-voltage. spectral and pulse photoresponse characteristics are presented. A barrier height of 1.52 eV has been determined from the C-V characteristics analysis. The transmittance spectra of the ITO/GaP interface in the wavelength range 250-500 nm have been calculated for different film thicknesses for device optimization. The internal quantum efficiency is analyzed as a function of the n-GaP epitaxial layer parameters and reverse bias. The results show that the hole diffusion length in the epitaxial layer of the n-n(+)GaP substrate can be determined from the measurements of the photocurrent variation on reverse bias MH - Mexico|Puebla MH - Portugal PB - BERLIN: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000169128500018 SO - Physica Status Solidi A-Applied Research 2001 ;185(1):137-144 4572 UI - 11907 AU - Walker JM AU - Lemos-Espinal JA AU - Cordes JE AU - Taylor HL AU - Smith HM AD - Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701, USAUNAM, Escuela Nacl Estudios Porfesionales Iztacala, Mexico City 54090, DF, MexicoLouisiana State Univ, Div Sci, Eunice, LA 70535, USARegis Univ, Dept Biol, Denver, CO 80221, USAUniv Colorado, Dept Environm Populat & Organism Biol, Boulder, CO 80309, USAWalker, JM, Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701, USA TI - Allocation of populations of whiptail lizards to septemvittattus Cope, 1892 (Genus Cnemidophorus) in Chihuahua, Mexico, and the scalaris problem AB - We used 11 samples comprising 224 specimens collected between 1966 and 1999 in Chihuahua, Mexico, and Texas to clarify aspects of color pattern and meristic variation in the notoriously difficult gonochoristic Cnemidophorus gularis-scalaris-septemvittatus complex which is characterized by enlarged mesoptychial scales and enlarged and platelike postantebrachial scales. We allocated populations represented in all SEPT-CMX samples except SEPT-CMX5 from northeastern Chihuahua to Cnemidophorus gularis septemvittatus Cope, 1892, type locality Marfa, Presidio County, Texas, represented by sample SEPT-TUS1. This allocation adds 28 newly discovered sites in Chihuahua to the single valid record previously known for the taxon in that state. Our study revealed that three taxonomically distinct forms, one in Trans-Pecos Texas east of Alamito Creek, Presidio County, and another in southern Coahuila, Mexico (both beyond the scope of this study), were included in septemvittatus in a 1962 taxonomic revision. Clarification of the distribution and variation of C g. septemvittatus in Chihuahua sets the stage for further systematic studies. Whiptail lizards in our SCAL-CMX samples from Chihuahua, for which only the name Cnemidophorus gularis scalaris Cope, 1892, is available, represent two forms distinguishable from each other and from C. g. septemvittatus on the basis of color patterns that remain distinct through ontogeny. Further sampling of Cnemidophorus populations in Chihuahua will be required to fully resolve the scalaris problem MH - Mexico|Distrito Federal MH - USA PB - CHARLESTON: AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0045-8511 UR - ISI:000173529600016 L2 - SYSTEMATICS; GULARIS; TEIIDAE; SAURIA SO - Copeia 2001 ;(3):747-765 4573 UI - 14093 AU - Walker SG AU - Gutierrez-Pena E AU - Muliere P AD - Univ Bath, Dept Math Sci, Bath BA2 7AY, Avon, EnglandUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv L Bocconi, Milan, ItalyWalker, SG, Univ Bath, Dept Math Sci, Bath BA2 7AY, Avon, England TI - A decision theoretic approach to model averaging AB - A topic which is receiving much current attention is the problem of Bayesian model averaging. This paper introduces a decision theoretic approach to the selection of the mixing density in the exchangeable data case. This effectively chooses an optimal averaging of the models according to some well-defined criterion MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 1 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0039-0526 UR - ISI:000167620200003 L2 - Dirichlet process;logarithmic score;predictive density;UNCERTAINTY SO - Journal of the Royal Statistical Society Series D-the Statistician 2001 ;50():31-39 4574 UI - 13781 AU - Wall D AU - Mooney H AU - Adams G AU - Boxshall G AU - Dobson A AU - Nakashizuka T AU - Seyani J AU - Samper C AU - Sarukhan J AD - Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523, USAStanford Univ, Dept Biol Sci, Stanford, CA 94305, USANat Hist Museum, Dept Zool, London SW7 5BD, EnglandPrinceton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544, USAKyoto Univ, Ctr Ecol Res, Otsu, Shiga 5202113, JapanCommonwealth Secretariat, London SW1Y 5HX, EnglandMinist Med Ambiente, Inst Alexander Von Humboldt, Bogota, ColombiaInst Ecol, Mexico City 04510, DF, MexicoWall, D, Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA TI - An International Biodiversity Observation Year AB - The International Geophysical Year (IGY), which took place between July 1957 and December 1958, helped us to rethink the world. At a time when there was a major paradigm shift In our understanding of the physical world, the international collaboration of the IGY helped to reset the discipline. The international Biodiversity Observation Year (BOY) is now occurring at a time when our dependence on, and understanding of, biodiversity is being acknowledged as a paradigm shift in our present view of the world. Although the benefits of IGY were initially Intellectual with practical effects remaining unknown until many years later, the benefits of greater knowledge of biodiversity will support efforts towards sustainability and affect the quality of life, both now and in the future. By providing the framework for International collaborations between scientists involved in every aspect of life on Earth, IBOY has the potential to redefine our current understanding of biodiversity in a manner similar to how IGY helped redefine the geophysical world MH - USA MH - Colombia MH - United Kingdom MH - Japan MH - Mexico|Distrito Federal PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0169-5347 UR - ISI:000168453700024 SO - Trends in Ecology & Evolution 2001 ;16(1):52-54 4575 UI - 13442 AU - Walter F AU - Brinks E AD - CALTECH, Dept Astron, Pasadena, CA 91125, USADept Astron, Guanajuato 36000, MexicoWalter, F, CALTECH, Dept Astron, 105-24,1201 Calif Blvd, Pasadena, CA 91125 USA TI - The neutral interstellar medium of the dwarf irregular galaxy DDO 47 and its companion AB - We present high-resolution H I observations obtained with the Very Large Array, as well as optical broadband imaging, of the dwarf irregular galaxy DDO 47 (UGC 3974, CGCG 087-030). The H I maps show a variety of structures, such as holes and shells, including one supergiant shell, in its neutral interstellar medium. We derive an H I mass for DDO 47 of 2.3 x 10(8) M-.. We cataloged 19 H I holes in DDO 47, about half of them showing signs of expansion. According to the "standard model,II their origin is believed to be due to past regions of massive star formation through the effects of stellar winds and supernova explosions. A comparison of H II regions with the positions of the H I holes yields that most of the current star-forming regions are situated near the rims of the larger H I holes, indicative of propagating star formation. The mean properties of the H I holes in DDO 47 are very much like those found in other dwarf galaxies. At a projected distance of 20 kpc (adopting a distance to DDO 47 of 4 Mpc), a galaxy that is cataloged as CGCG 087-033 was found to be at almost the same systemic velocity as DDO 47. This object is a likely companion, with an H I mass of 1.4 x 10(7) M. and a dynamical mass of at least 1.2 x 10(8) M-.. A dynamical study of DDO 47 reveals that this object requires dark matter at a level of about 80% of its dynamical mass (M-dyn approximate to 5 x 10(9) M.) to explain the observed rotation (assuming a stellar mass-to-light ratio of 1 M-./L-B.). Using a simple mass model, the scale height of the H I distribution of DDO 47 is derived to be about 500 pc. This high value is similar to values found in other dwarf irregular galaxies and can be explained as being due to a lower gravitational potential. In summary, DDO 47 is a gas-rich dwarf irregular galaxy that shows a rather complex structure in its neutral interstellar medium. We speculate that the flyby of the companion may have triggered a starburst in DDO 47 in the past, which may have created the H I holes that are now present MH - USA MH - Mexico|Guanajuato PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000169387500012 L2 - galaxies : individual (DDO 47, CGCG 087-033);galaxies : irregular;galaxies : ISM;ISM : bubbles;ISM : h I;ISM : structure;radio emission lines;HYDROGEN-LINE SURVEY; H-II GALAXIES; SPIRAL GALAXIES; STAR FORMATION; NEARBY GALAXIES; HOLMBERG-II; SHELLS; HOLES; SCALE; SUPERSHELLS SO - Astronomical Journal 2001 ;121(6):3026-3040 4576 UI - 12153 AU - Walter JE AU - Briggs J AU - Guerrero ML AU - Matson DO AU - Pickering LK AU - Ruiz-Palacios G AU - Berke T AU - Mitchell DK AD - Childrens Hosp Kings Daughters, Eastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23510, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Pecs, Sch Med, Dept Clin Chem, Pecs, HungaryMitchell, DK, Childrens Hosp Kings Daughters, Eastern Virginia Med Sch, Ctr Pediat Res, 855 W Brambleton Ave, Norfolk, VA 23510 USA TI - Molecular characterization of a novel recombinant strain of human astrovirus associated with gastroenteritis in children AB - We report a naturally occurring human astrovirus (HAstV) strain detected in two different geographic locations. We identified two isolates of this strain in a diarrhea outbreak at a child care center in Houston, Texas; and two isolates in diarrhea stool samples from two children in Mexico City. All four isolates were detected in stool samples by enzyme immunoassay (EIA). One of the Mexican isolates was typed by EIA and all four isolates were HAstV-5 by typing RT-PCR. The four isolates were > 97% nucleotide-identical in two different genomic regions: ORF1a (246nt), and the 3' end of the genome (471nt). One isolate from each geographic location was further sequenced in the transition region from ORF1b to ORF2 (1255nt) and this region of the two isolates showed greater than or equal to 99% nt identity. Phylogenetic analyses of sequences of eight HAstV antigenic types and the novel strain in the transition region demonstrated the new strain being closely related to HAstV-3 in ORF1b, but closest to HAstV-5 in ORF2. These results and high sequence identity among all HAstV antigenic types in the transition region and RNA structural predictions supported a potential recombination site at the ORF1b/ORF2 junction. This is the first evidence that recombination occurs among human astroviruses MH - Hungary MH - Mexico|Distrito Federal MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 11 U4 - Virology U5 - J;Article AV - English IS - 0304-8608 UR - ISI:000172842700008 L2 - BROME MOSAIC-VIRUS; HOMOLOGOUS RNA RECOMBINATION; POLYMERASE CHAIN-REACTION; IN-VITRO; VIRAL REPLICASE; SEQUENCE; POLIOVIRUS; SEROTYPES SO - Archives of Virology 2001 ;146(12):2357-2367 4577 UI - 14357 AU - Walter JE AU - Mitchell DK AU - Guerrero ML AU - Berke T AU - Matson DO AU - Monroe SS AU - Pickering LK AU - Ruiz-Palacios G AD - Childrens Hosp Kings Daughters, Eastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23510, USACtr Dis Control & Prevent, Atlanta, GA, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoWalter, JE, Childrens Hosp Kings Daughters, Eastern Virginia Med Sch, Ctr Pediat Res, 855 W Brambleton Ave, Norfolk, VA 23510 USA TI - Molecular epidemiology of human astrovirus diarrhea among children from a periurban community of Mexico City AB - Human astroviruses (HAstVs) were detected in 23 stool samples from 365 diarrhea episodes among 214 children (<18 months old) prospectively monitored for diarrhea in Mexico City. Stool samples were tested by EIA and reverse transcriptase-polymerase chain reaction (RT-PCR) analysis. EIA was less sensitive (74%) and equally specific, compared with RT-PCR analysis using type-common primers for HAstV detection. Of 31 HAstV isolates, EIA typed 18 (69%) of 26 EIA-positive samples, and RT-PCR analysis typed 26 (84%) of 31 RT-PCR-positive samples. Phylogenetic analysis of the 3' end of the capsid region (363 nucleotides) confirmed the type assignment by EIA and RT-PCR analysis and determined the type for 5 previously untyped samples. Six HAstV antigenic types cocirculated in the community: HAstV-2 (42%), HAstV-4 (23%), HAstV-3 (13%), HAstV-1 (10%), HAstV-5 (6%), and HAstV-7 (6%). RT-PCR and sequence analysis provided more detailed epidemiology of HAstV in the community than did antigenic detection methods MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 30 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000166836500001 L2 - POLYMERASE CHAIN-REACTION; REVERSE TRANSCRIPTION; ENZYME-IMMUNOASSAY; RNA SEQUENCE; RT-PCR; INFECTION; PREVALENCE; GASTROENTERITIS; INFANTS; IDENTIFICATION SO - Journal of Infectious Diseases 2001 ;183(5):681-686 4578 UI - 12518 AU - Wang J AU - Podlich DW AU - Cooper M AU - Delacy IH AD - Univ Queensland, Sch Land & Food Sci, Brisbane, Qld 4072, AustraliaCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoPodlich, DW, Univ Queensland, Sch Land & Food Sci, Brisbane, Qld 4072, Australia TI - Power of the joint segregation analysis method for testing mixed major-gene and polygene inheritance models of quantitative traits AB - Understanding the genetic architecture of quantitative traits can greatly assist the design of strategies for their manipulation in plant-breeding programs. For a number of traits, genetic variation can be the result of segregation of a few major genes and many polygenes (minor genes). The joint segregation analysis (JSA) is a maximum-likelihood approach for fitting segregation models through the simultaneous use of phenotypic information from multiple generations. Our objective in this paper was to use computer simulation to quantify the power of the JSA method for testing the mixed-inheritance model for quantitative traits when it was applied to the six basic generations: both parents (P-1 and P-2), F-1, F-2, and both backcross generations (B-1 and B-2) derived from crossing the F-1 to each parent. A total of 1968 genetic model-experiment scenarios were considered in the simulation study to quantify the power of the method. Factors that interacted to influence the power of the JSA method to correctly detect genetic models were: (1) whether there were one or two major genes in combination with polygenes, (2) the heritability of the major genes and polygenes, (3) the level of dispersion of the major genes and polygenes between the two parents, and (4) the number of individuals examined in each generation (population size). The greatest levels of power were observed for the genetic models defined with simple inheritance; e.g., the power was greater than 90% for the one major gene model, regardless of the population size and major-gene heritability. Lower levels of power were observed for the genetic models with complex inheritance (major genes and polygenes), low heritability, small population sizes and a large dispersion of favourable genes among the two parents; e.g., the power was less than 5% for the two major-gene model with a heritability value of 0.3 and population sizes of 100 individuals. The JSA methodology was then applied to a previously studied sorghum data-set to investigate the genetic control of the putative drought resistance-trait osmotic adjustment in three crosses. The previous study concluded that there were two major genes segregating for osmotic adjustment in the three crosses. Application of the JSA method resulted in a change in the proposed genetic model. The presence of the two major genes was confirmed with the addition of an unspecified number of polygenes MH - Australia MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000171839800019 L2 - joint segregation analysis (JSA);mixed inheritance model;osmotic adjustment;power analysis;QU-GENE;OSMOTIC ADJUSTMENT; LINES SO - Theoretical and Applied Genetics 2001 ;103(5):804-816 4579 UI - 10318 AU - Wang JA AU - Chen LF AU - Li CL AU - Novaro O AD - Natl Polytech Inst, Super Sch Chem Engn, Lab Catalysis & Mat, Mexico City 07738, DF, MexicoE China Univ Sci & Technol, Petr Proc Res Ctr, Shanghai 200237, Peoples R ChinaNatl Autonomous Univ Mexico, Inst Phys, Mexico City 01000, DF, MexicoWang, JA, Natl Polytech Inst, Super Sch Chem Engn, Lab Catalysis & Mat, Col Zacatenco, Mexico City 07738, DF, Mexico TI - Characterization of structure and combustion behavior of the coke formed on a hydroisomerization catalyst AB - Catalytic stability of a Pd/H-Mordenite catalyst for C-5/C-6 hydroisomerization was tested in a laboratory reactor for 1000 hours. The content, chemical composition and structure of the coke formed on the catalyst discharged from a pilot reactor working in an accelerated condition was characterized using XRD, EPR, MAS-NMR, FTIR and TPO techniques. The catalyst shows stable catalytic activity and selectivity during 1000 hours. The nature of the coke and its combustion behavior depended upon time on stream and varied with the catalyst bed length. As time on stream increased, coke initially formed on palladium metals and then moved to acidic sites on the support where polyaromatic or pseudographite-like structures were formed through further acid catalyzed reactions MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000177817200007 L2 - DEACTIVATION; ISOMERIZATION SO - Catalyst Deactivation 2001, Proceedings 2001 ;139():53-60 4580 UI - 12444 AU - Wang JK AU - Gai JY AD - Henan Acad Agr Sci, Lab Ctr, Zhengzhou 450002, Henan, Peoples R ChinaNanjing Agr Univ, Soybean Res Inst, Nanjing 210095, Peoples R ChinaWang, JK, CIMMYT, Wheat Program, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Mixed inheritance model for resistance to agromyzid beanfly (Melanagromyza sojae Zehntner) in soybean AB - A quantitative trait could be controlled by a few major genes and many polygenes. Distinguishing the effects of major genes from polygenes and/or environments is important for understanding the expression of a major gene in relation to its genetic background, and for predicting the segregation of a cross in breeding. Our objective was to re-analyze the resistance of soybean to agromyzid beanfly by a mixed inheritance model. Number of insects in stem (NIS) was used as an indicator of resistance. The previous result from the segregation ratio of resistance and susceptibility was that resistance was controlled by one dominant gene. The major results from the mixed inheritance model were (1) the inheritance of resistance was controlled by one major gene along with minor genes; (2) Additive and dominance effects of minor genes were generally less than those of the major gene and varied among crosses, indicating different minor gene systems; (3) Heritability was higher for the major gene than for the minor genes; (4) The F-2 plants and F-2:3 lines were classified into appropriate genotypes according to their posterior probabilities and the critical value to distinguish resistant and susceptible plants was given for NIS based on the classification. These results indicated that mixed major gene and polygene genetic analysis was superior to the frequently used classical Mendelian method MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000172070100002 L2 - agromyzid beanfly (Melanagromyza sojae Zehntner);graphical analysis;mixed major gene and polygene inheritance model;segregation analysis;soybean;QUANTITATIVE TRAITS; POLYGENIC INHERITANCE; MAJOR GENE; SEGREGATION SO - Euphytica 2001 ;122(1):9-18 4581 UI - 12997 AU - Wang MHLS AU - Berisso MC AU - Christian DC AU - Felix J AU - Gara A AU - Gottschalk E AU - Gutierrez G AU - Hartouni EP AU - Knapp BC AU - Kreisler MN AU - Lee S AU - Markianos K AU - Moreno G AU - Reyes MA AU - Sosa M AU - Wehmann A AU - Wesson D AD - Lawrence Livermore Natl Lab, Livermore, CA 94551, USAUniv Massachusetts, Amherst, MA 01003, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Leon, Guanajuato, MexicoColumbia Univ, Nevis Lab, Irvington, NY 10533, USAUniv Michoacana, Morelia, Michoacan, MexicoWang, MHLS, Lawrence Livermore Natl Lab, Livermore, CA 94551, USA TI - Diffractively produced charm final states in 800-GeV/c pp collisions AB - We report the first observation of diffractively produced open charm in 800-GeV/c pp collisions of the type pp --> pD*X. We measure cross sections of sigma (diff)(D*+) = (0.185 +/- 0.044 +/- 0.054) mub and sigma (diff)(D*-) = (0.174 +/- 0.034 +/- 0.029) mub. Our measurements are based on 4.3 X 10(9) events recorded by FNAL E690 in the fixed-target run of 1991. We compare our results with previous fixed-target charm experiments MH - Mexico|Guanajuato MH - Mexico|Michoacan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000170592500009 L2 - MESON PRODUCTION; PROTON; PHYSICS SO - Physical Review Letters 2001 ;8708(8): 4582 UI - 13777 AU - Wang YX AU - Vazquez-Duhalt R AU - Pickard MA AD - Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, CanadaUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62271, Morelos, MexicoPickard, MA, Univ Alberta, Dept Biol Sci, CW 405 Biol Sci Bldg, Edmonton, AB T6G 2E9, Canada TI - Effect of growth conditions on the production of manganese peroxidase by three strains of Bjerkandera adusta AB - We were looking for a strain of Bjerkandera adusta that produces high titres of manganese peroxidase under optimal conditions for large-scale enzyme purification. We have chosen two strains from the University of Alberta Microfungus Collection and Herbarium, UAMH 7308 and 8258, and compared the effects of growth conditions and medium composition on enzyme production with the well-characterized strain BOS55 (ATCC 90940). Of four types of cereal bran examined, rice bran at 3% (w/v) in 60 mM phosphate buffer pH 6 supported the highest levels of enzyme production. Using 100 mL medium in 500-mL Erlenmeyer flasks, maximum enzyme levels in the culture supernatant occurred after about 10 days of growth; 5.5 U.mL(-1) for UAMH 7308, 4.4 U.mL(-1) for UAMH 8258, and 1.7 U.mL(-1) for BOS55, where units are expressed as micromoles of Mn-malonate formed per minute. Growth as submerged cultures in 10-L stirred tank reactors produced 3.5 U.mL(-1) of manganese peroxidase (MnP) by UAMH 8258 and 2.5 U.mL(-1) of MnP by 7308, while enzyme production by BOS55 was not successful in stirred tank reactors but could be scaled up in 2-L shake flasks containing 400 mL rice bran or glucose - malt - yeast extract (GMY) - Mn-glycolate medium to produce MnP levels of 1.7 U.mL(-1). These results show that the two strains of B. adusta, UAMH 7308 and 8258, can produce between two and three times the manganese peroxidase level of B. adusta BOS55, that they are good candidates for scale up of enzyme production, and that the rice bran medium supports higher levels of enzyme production than most previously described media MH - Canada MH - Mexico|Morelos PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000168526800001 L2 - growth conditions;cereal bran;manganese peroxidase;Bjerkandera adusta;white rot fungi;WHITE-ROT FUNGI; PHANEROCHAETE-CHRYSOSPORIUM; LIGNIN PEROXIDASE; PLEUROTUS-ERYNGII; PHLEBIA-RADIATA; MINERALIZATION; SUBSTRATE; LACCASE; ENZYMES; BOS55 SO - Canadian Journal of Microbiology 2001 ;47(4):277-282 4583 UI - 13655 AU - Weidenheim KM AU - Escobar A AD - Montefiore Med Ctr, Bronx, NY 10467, USAUNAM, Mexico City, DF, Mexico TI - Glial proliferation in autistic spectrum disorders MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER ASSN NEUROPATHOLOGISTS INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences;Pathology U5 - J;Meeting Abstract AV - English IS - 0022-3069 UR - ISI:000168786800209 SO - Journal of Neuropathology and Experimental Neurology 2001 ;60(5):552-552 4584 UI - 14242 AU - Weiss ML AU - Dobbs ME AU - MohanKumar PS AU - Chowdhury SI AU - Sawrey K AU - Guevara-Guzman R AU - Huang J AD - Kansas State Univ, Coll Vet Med, Dept Anat & Physiol, Manhattan, KS 66506, USAMichigan State Univ, Coll Vet Med, Dept Vet Pathol, E Lansing, MI 48824, USAKansas State Univ, Dept Diagnost Med Pathobiol, Manhattan, KS 66506, USAUNAM, Fac Med, Dept Fisiol, Mexico City, DF, MexicoWeiss, ML, Kansas State Univ, Coll Vet Med, Dept Anat & Physiol, 1600 Denison Ave,Coles Hall 105, Manhattan, KS 66506 USA TI - The estrous cycle affects pseudorabies virus (PRV) infection of the CNS AB - Previous work had suggested that mucosal immunity may be affected by the stage of the estrous cycle. Here, susceptibility to a neurotropic virus infection at different stages of the estrous cycle was assessed in a rodent model after direct injection of the virus into visceral organs. in the first two experiments, female Sprague-Dawley rats were infected with pseudorabies virus (PRV, Bartha's K-strain) by injection into either the cervix or the kidney after monitoring their estrous cycle. After either 4- or 5-day survival period post-infection, the rats were euthanized by transcardially perfusion and peripheral and central nervous system tissues were removed for immunocytochemical staining. The number of infected neurons was counted in various regions. Statistical analysis revealed that: (1) the number of infected cells in the sympathetic or parasympathetic ganglion, or the dorsal root ganglia was not affected regardless of the stage of the estrous cycle after cervix injection with PRV; (2) in contrast, the number of infected neurons in the spinal cord was affected significantly by the stage of the estrous cycle during viral infection of the cervix; (3) after kidney infection, the number of infected neurons found within the spinal cord or dorsal root ganglia varied significantly across the estrous cycle. In both cases, animals infected in proestrus or estrus had fewer infected neurons than animals: infected in diestrus I or diestrus II (proestrous and estrous animals had less than 20% of infected cells found in diestrus I or diestrus II rats). In the third experiment, older, persistent estrous or persistent diestrous rats were infected by kidney injection and given a 4-day survival period, prior to virus isolation from lower thoracic spinal cord. Animals in persistent estrous had significantly less virus per gram of tissue than the persistent diestrous rats. These data suggest that the CNS of animals in proestrus or estrus is less susceptible to PRV infection compared to animals in either diestrus I or diestrus II. Because estrogen replacement therapy is known to restore some immune functions during reproductive ageing, it is speculated that plasma estrogen levels modulate the central nervous system's susceptibility to viral infections. (C) 2001 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000167225600024 L2 - cervix;alpha-herpesvirus;kidney;reproductive system;viral tract tracing;estrogen;trans-synaptic transport;PITUITARY-ADRENAL AXIS; COLLAGEN-INDUCED ARTHRITIS; FEMALE REPRODUCTIVE-TRACT; CENTRAL-NERVOUS-SYSTEM; SEX STEROID REGULATION; AFFERENT-FIBERS; PELVIC NERVE; PREGANGLIONIC NEURONS; HYPOGASTRIC NERVE; MUCOSAL IMMUNITY SO - Brain Research 2001 ;893(1-2):215-226 4585 UI - 12460 AU - Weissbecker KA AU - Green-Leibovitz MI AU - Camarena B AU - Rinetti G AU - Ezzell J AU - Winstead DK AU - Nicolini H AD - Tulane Univ Med Ctr Hosp & Clin, Dept Psychiat & Neurol, New Orleans, LA, USATulane Univ Med Ctr Hosp & Clin, Hayward Genet Program, New Orleans, LA, USAInst Mexicano Psiquiatria, Mexico City, DF, Mexico TI - Complex segregation analysis of obsessive-compulsive disorder in Mexican pedigrees MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000171648901308 SO - American Journal of Human Genetics 2001 ;69(4):406-406 4586 UI - 14069 AU - Wessagowit V AU - Ashton GHS AU - Mohammedi R AU - Salas-Alanis JC AU - Denyer JE AU - Mellerio JE AU - Eady RAJ AU - McGrath JA AD - St Thomas Hosp, Dept Cell & Mol Pathol, St Johns Inst Dermatol, London SE1 7EH, EnglandUniv Autonoma Nuevo Leon, Med Serv, Monterrey, MexicoHosp Sick Children, Dept Dermatol, London WC1N 3JH, EnglandMcGrath, JA, St Thomas Hosp, Dept Cell & Mol Pathol, St Johns Inst Dermatol, Lambeth Palace Rd, London SE1 7EH, England TI - Three cases of de novo dominant dystrophic epidermolysis bullosa associated with the mutation G2043R in COL7A1 AB - In the absence of a positive family history, it is often difficult to determine whether a single case of mild-to-moderately severe dystrophic epidermolysis bullosa (DEB) represents autosomal recessive or de novo dominant disease. Recent molecular analyses of the type VII collagen gene, COL7A1, have established that the vast majority of such cases are recessive in nature. Nevertheless, a small number of de novo dominant patients have been documented. In this report, we describe three further examples of de novo dominant disease. In each case the COL7A1 mutation comprised the same glycine substitution, G2043R. This mutation has previously been reported in both dominant DEB pedigrees and as a de novo phenomenon and is the most common COL7A1 mutation in dominant DEB throughout the world. These cases emphasize the importance of molecular analysis in providing accurate genetic counselling in this genodermatosis MH - United Kingdom MH - Mexico|Nuevo Leon PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Dermatology U5 - J;Article AV - English IS - 0307-6938 UR - ISI:000167679100025 L2 - COLLAGEN GENE COL7A1; GLYCINE SUBSTITUTION MUTATIONS; VARIANTS SO - Clinical and Experimental Dermatology 2001 ;26(1):97-99 4587 UI - 14117 AU - Whittaker P AU - Stewart EL AU - Turner EA AU - Diaz M AU - Rosado JL AU - Dunkel VC AD - US FDA, Washington, DC 20204, USASUSTAIN, Washington, DC 20036, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - In vitro prediction of iron bioavailability for tortilla fortification MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000167438103637 SO - Faseb Journal 2001 ;15(4):A634-A634 4588 UI - 13100 AU - Wiedenfeld H AU - ndrade-Cetto A AD - Univ Bonn, Inst Pharmazeut, D-53121 Bonn, GermanyUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Mexico City 04510, DF, MexicoWiedenfeld, H, Univ Bonn, Inst Pharmazeut, Immenburg 4, D-53121 Bonn, Germany TI - Pyrrolizidine alkaloids from Ageratum houstonianum Mill AB - Four pyrrolizidine alkaloids (PA) were isolated from Ageratum houstonianum and their structures elucidated by spectroscopical methods. Besides the already known lycopsamine three new PA were found. Their structures are the 2S-2-hydroxy-2,3-dimethylbutanoyl-O-9 as well as the O-7 esters of retronecine and the O-9 derivative of heliotridine. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000170281600016 L2 - Ageratum houstonium (Mill);Asteraceae;Eupatorieae;pyrrolizidine alkaloids;lycopsamine;O-9-(2S-2-hydroxy-2,3-dimethyl-butanoyl)-retronecine;O-9-(2S-2-hydroxy-2,3-dimethyl-butanoyl)-heliotridine;O-7-(2S-2-hydroxy-2,3-dimethyl-butanoyl)-retronecine;BENZOFURAN DERIVATIVES; FLAVONOIDS SO - Phytochemistry 2001 ;57(8):1269-1271 4589 UI - 12688 AU - Wilcots EM AU - Turnbull MC AU - Brinks E AD - Univ Wisconsin, Dept Astron, Madison, WI 53706, USAUniv Arizona, Steward Observ, Tucson, AZ 85721, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoWilcots, EM, Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA TI - H I gas in the environment of the Seyfert galaxies NGC 6764 and Markarian 1126 AB - We present the results of a 21 cm line study of the environment of two Seyfert galaxies : NGC 6764 and Mrk 1126. Both galaxies are embedded in large and slightly distorted gaseous disks that extend 2-4 times farther than their optical diameters. The asymmetry of the H I distribution and profile is indicative of a weak perturbation, although one that is not strong enough to disturb either the gas or the stars in the inner parts of the galaxies. Whereas Mrk 1126 does have a nearby companion, MCG -02-58-017, the gravitational interaction between the two galaxies is quite weak, and it is unlikely that MCG -02-58-017 is responsible for driving the nuclear activity in Mrk 1126. NGC 6764 has no companions within a radius of 160 kpc. We conclude that the nuclear activity in NGC 6764 and Mrk 1126 is unrelated to the galaxies' immediate environment MH - USA MH - Mexico|Guanajuato PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000171587300011 L2 - galaxies : individual (NGC 6764, Markarian 1126);galaxies : interactions;galaxies : ISM;galaxies : Seyfert;SPIRAL GALAXIES; NEUTRAL HYDROGEN; LINER NGC-6764; MINOR MERGERS; COMPANIONS; KINEMATICS; STARBURST; ROTATION; DYNAMICS; CCD SO - Astrophysical Journal 2001 ;560(1):110-118 4590 UI - 13405 AU - Willems EW AU - Valdivia LF AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Univ, Med Ctr Rotterdam EMCR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacobiol, Czda Tenorios 235,Col Granjas Coapa,Deleg Tlalpan, Mexico City 14330, DF, Mexico TI - Pharmacological profile of the mechanisms involved in the external carotid vascular effects of the antimigraine agent isometheptene in anaesthetised dogs AB - The present study set out to investigate the external carotid vascular effects of isometheptene in vagosympathectomised dogs, anaesthetised with pentobarbital. One-minute intracarotid (intra-arterial; i.a.) infusions of isometheptene (10, 30, 100 and 300 mug/min) produced dose-dependent decreases in external carotid blood flow, without affecting blood pressure or heart rate. The vasoconstrictor responses to 100 mug/min and 300 mug/min of isometheptene were clearly attenuated in animals pretreated with reserpine (5000 mug/kg). Moreover, after prazosin (an alpha (1)-adrenoceptor antagonist; 100 mug/kg), the responses to isometheptene remained unaltered in untreated as well as reserpine-pretreated dogs. In contrast, the responses to isometheptene were attenuated by rauwolscine (an alpha (2)-adrenoceptor antagonist; 300 mug/kg) in untreated animals, and were practically abolished in reserpine-pretreated dogs. Further investigation into the specific alpha (2)-adrenoceptor subtypes, using selective antagonists, showed that BRL44408 (alpha (2A)) and MK912 (alpha (2C)) markedly attenuated this response, while imiloxan (alpha (2B)) was ineffective. The involvement of 5-HT1B and 5-HT1D receptors seems highly unlikely since antagonists at 5-HT1B (SB224289) and 5-HT1D (BRL15572) receptors (both at 300 mug/kg) were ineffective. On this basis, it is concluded that isometheptene-induced canine external carotid vasoconstriction is mediated by both indirect (a tyramine-like action) and direct (acting at receptors) mechanisms, which mainly involve alpha (A)- and alpha (2C)-adrenoceptors, while the involvement of alpha (1)-adrenoceptors seems rather limited MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000169533600005 L2 - alpha-adrenoceptor subtypes;dog;external carotid bed;5-HT1B/1D;imiloxan;isometheptene;migraine;vasoconstriction;ARTERIOVENOUS ANASTOMOSES; 5-HT RECEPTORS; ALPHA(2)-ADRENOCEPTOR; SUBTYPES; ANTAGONISTS; ALPHA(1)-ADRENOCEPTOR; VASOCONSTRICTION; CONSTRICTION; SUMATRIPTAN; HEADACHE SO - Naunyn-Schmiedebergs Archives of Pharmacology 2001 ;364(1):27-32 4591 UI - 13440 AU - Willems EW AU - Heiligers JPC AU - De Vries P AU - Kapoor K AU - Tom B AU - Villalon CM AU - Saxena PR AD - Erasmus Univ, Med Ctr, EMCR,Dutch Migraine Res Grp, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsErasmus Univ, Med Ctr, Cardiovasc Res Inst COEUR, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Farmacol, Mexico City 07738, DF, MexicoSaxena, PR, Erasmus Univ, Med Ctr, EMCR,Dutch Migraine Res Grp, Dept Pharmacol, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - alpha(1)-adrenoceptor subtypes mediating vasoconstriction in the carotid circulation of anaesthetized pigs: possible avenues for antimigraine drug development AB - It has recently been shown that the alpha -adrenoceptors mediating vasoconstriction of porcine carotid arteriovenous anastomoses resemble both alpha- and alpha (2)-adrenoceptors, but no attempt was made to identify the specific subtypes (alpha (1A), alpha (1B) and alpha (1D)) involved. Therefore, the present study was designed to elucidate the specific subtype(s) of alpha (1)-adrenoceptors involved in the above response, using the alpha (1)-adrenoceptor agonist phenylephrine and alpha (1)adrenoceptor antagonists 5-methylurapidil (alpha (1A)), L-765 314 (alpha (1B)) and BMY 7378 (alpha (1D)). Ten-minute intracarotid infusions of phenylephrine (1, 3 and 10 mu gkg(-1).min(-1)) induced a dose-dependent decrease in total carotid and arteriovenous anastomotic conductance, accompanied by a small tachycardia. These carotid vascular effects were abolished by L-765 314 (1000 mu gkg(-1); i.v.), while these responses were only attenuated by 5-methylurapidil (1000 mu gkg(-1); i.v.), and BMY 7378 (1000 mu gkg(-1); i.v.). Furthermore, intravenous bolus injections of phenylephrine (3 and 10 mu gkg (-1)) produced a dose-dependent vasopressor response, which was only affected by 1000 mu gkg(-1) of 5-methylurapidil, while the other antagonists were ineffective. These results, coupled to the binding affinities of the above antagonists at the different alpha (1)-adrenoceptors, suggest that both alpha (1A)- and alpha (1B)-adrenoceptors mediate constriction of carotid arteriovenous anastomoses in anaesthetized pigs. In view of the less ubiquitous nature of alpha (1B)- compared to alpha (1A)-adrenoceptors, the development of potent and selective alpha (1B)-adrenoceptor agonists may prove to be important for the treatment of migraine MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0333-1024 UR - ISI:000169497400008 L2 - alpha(1)-adrenoceptors;arteriovenous anastomoses;carotid;migraine;pit;NORADRENALINE-INDUCED CONTRACTIONS; SMOOTH-MUSCLE CONTRACTION; ARTERIOVENOUS ANASTOMOSES; INTERNATIONAL UNION; ALPHA-ADRENOCEPTORS; ADRENERGIC-RECEPTOR; BLOOD-FLOW; RAT AORTA; PHARMACOLOGY; ALPHA(2)-ADRENOCEPTOR SO - Cephalalgia 2001 ;21(2):110-119 4592 UI - 13511 AU - Willems EW AU - Valdivia LF AU - Ramirez-San Juan E AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Mexico City 14330, DF, MexicoErasmus Univ, NL-3000 DR Rotterdam, NetherlandsIPN, ENCB, Fisiol, Mexico City 11340, DF, MexicoVillalon, CM, IPN, CINVESTAV, Czda Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Pharmacological identification of the major subtypes of adrenoceptors involved in the canine external carotid vasoconstrictor effects of adrenaline and noradrenaline AB - This study investigated the potential effects of adrenaline and noradrenaline on the external carotid blood flow of vagosympathectomised dogs and the receptor mechanisms involved. One minute (1 min) intracarotid infusions of adrenaline and noradrenaline produced dose-dependent decreases in external carotid blood flow without changes in blood pressure or heart rate. These responses, which remained unaffected after saline, were: (i) mimicked by the adrenoceptor agonists, phenylephrine (alpha (1)) and BHT933 (6-Ethyl- 5,6,7,8- tetrahydro- 4H- oxazolo [4,5-d] azepin-2-amine dihydrochloride; alpha (2)); (ii) abolished after phentolamine (2000 mug/kg) unmasking a vasodilator component (subsequently blocked by propranolol; 1000 mug/kg); and (iii) partly blocked by rauwolscine (30 and 100 mug/kg). and subsequently abolished by prazosin (100 mug/kg). Accordingly, rauwolscine (100 and 300 mug/kg) markedly blocked the responses to BHT933 without affecting those to phenylephrine; likewise, prazosin (100 mug/kg) markedly blocked the responses to phenylephrine without affecting those to BHT933. These results show that both alpha (1)- and alpha (2)-adrenoceptors mediate vasoconstriction within the canine external carotid circulation. Moreover, after blockade of alpha (1)/alpha (2)-adrenoceptors, both adrenaline and noradrenaline exhibit a P-adrenoceptor-mediated vasodilator component. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000169213900003 L2 - adrenaline;alpha-adrenoceptors;dog;external carotid vasoconstriction;noradrenaline;ARTERIOVENOUS ANASTOMOSES; VAGOSYMPATHECTOMIZED DOGS; ANTIMIGRAINE DRUGS; THORACIC AORTA; RECEPTORS; MIGRAINE; ALPHA(1)-ADRENOCEPTOR; 5-HT; ALPHA(2)-ADRENOCEPTOR; CONSTRICTION SO - Life Sciences 2001 ;69(2):143-153 4593 UI - 13897 AU - Willems EW AU - Heiligers JPC AU - De Vries P AU - Tom B AU - Kapoor K AU - Villalon CM AU - Saxena PR AD - Erasmus Univ, Med Ctr Rotterdam EMCR, Dept Pharmacol, Dutch Migraine Res Grp, NL-3000 DR Rotterdam, NetherlandsErasmus Univ, Fac Med & Hlth Sci, Cardiovasc Res Inst COEUR, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Farmacol, Mexico City 14330, DF, MexicoSaxena, PR, Erasmus Univ, Med Ctr Rotterdam EMCR, Dept Pharmacol, Dutch Migraine Res Grp, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - A61603-induced vasoconstriction in porcine carotid vasculature: involvement of a non-adrenergic mechanism AB - It has recently been shown that the pharmacological profile of alpha (1)-adrenoceptors mediating constriction of porcine carotid arteriovenous anastomoses resembles that of alpha (1A)- and alpha (1B)-adrenoceptor subtypes. In an attempt to verify the involvement of alpha (1A)-adrenoceptors, we used the potent alpha (1A)-adrenoceptor agonist N-[5-(4,5-dihydro-1 H-imidazol-2yl)-2-hydroxy-5,6,7,8-tetrahhydronaphthalen-1-yl]methane sulphonamide (A61603) and found that intracarotid (i.c.) administration of A61603 (0.3-10 mug kg(-1)) dose-dependently decreased porcine carotid blood flow and vascular conductance. This decrease was exclusively due to a constriction of carotid arteriovenous anastomoses; the capillary blood flow and conductance remained unchanged. Surprisingly, the responses to A61603 were little modified by prior i.v. treatment with 5-methylurapidil (1000 mug kg(-1)), prazosin (100 mug kg(-1)) or a combination of prazosin and rauwolscine (100 and 300 mug kg(-1), respectively). The 5-HT1B/1D receptor antagonist N-[4-melhoxy-3-(4-methyl-1-piperazinyl) phenyl]-2 ' -methyl-4 ' (5-methyl-1,2,4-oxadiazoal-3-yl)[1,l,-biphenyl]-4-carboxamide hydrochloride monohydrate (GR127935; 500 mug kg(-1)) and ketanserin (500 mug kg(-1)) also failed to modify carotid vascular responses to A61603, but, interestingly, methiothepin (3000 mug kg(-1)) proved to be an effective antagonist. Taken together, the present results show that A61603 is a relatively poor agonist at the alpha (1A)-adrenoceptor in anaesthetised pigs and that the carotid vasoconstriction produced by A61603 is mediated by a novel non-adrenergic mechanism. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000168203200006 L2 - A61603;alpha-adrenoceptor;arteriovenous anastomoses;carotid artery;migraine;vasoconstriction;ARTERIOVENOUS ANASTOMOSES; VAGOSYMPATHECTOMIZED DOGS; RECEPTOR AGONIST; 5-HT RECEPTORS; 5-HT1-LIKE RECEPTORS; SUMATRIPTAN; ALPHA(1)-ADRENOCEPTOR; 5-HYDROXYTRYPTAMINE; CONSTRICTION; RESPONSES SO - European Journal of Pharmacology 2001 ;417(3):195-201 4594 UI - 14127 AU - Willems EW AU - Valdivia LF AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Univ, Med Ctr Rotterdam, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacobiol, Calzada Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - The role of several alpha(1)- and alpha(2)-adrenoceptor subtypes mediating vasoconstriction in the canine external carotid circulation AB - 1 It has recently been shown that both alpha (1)- and alpha (2)-adrenoceptors mediate vasoconstriction in the canine external carotid circulation. The present study set out to identify the specific subtypes (alpha (1A), alpha (1B) and alpha (1D) as well as alpha (2A), alpha (2B) and alpha (2C)) mediating the above response. 2 Consecutive 1 min intracarotid infusions of phenylephrine (alpha (1)-adrenoceptor agonist) and BHT933 (alpha (2)-adrenoceptor agonist) produced dose-dependent decreases in external carotid blood flow, without affecting mean arterial blood pressure or heart rate. 3 The responses to phenylephrine were selectively antagonized by the antagonists, 5-methylurapidil (alpha (1A)) or BMY7378 (alpha (1D)), but not by L-765,314 (alpha (1B)), BRL44408 (alpha (2A)), imiloxan (alpha (2B)) or MK912 (alpha (2C)). In contrast, only BRL44408 or MK912 affected the responses to BHT933. 4 The above results support our contention that mainly the alpha (1A), alpha (1D), alpha (2A) and alpha (2C)-adrenoceptor subtypes mediate vasoconstriction in the canine external carotid circulation MH - Mexico|Distrito Federal MH - Netherlands PB - BASINGSTOKE: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 13 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000167499200016 L2 - alpha-Adrenoceptor subtypes;BMY7378;BRL44408;dog;external carotid bed;imiloxan;5-methylurapidil;L-765,314;migraine;MK912;ARTERIOVENOUS ANASTOMOSES; RECEPTORS; ALPHA(1)-ADRENOCEPTOR; ARTERY; CONTRACTIONS; ANTAGONISTS; 5-HT1B; CONSTRICTION; INVOLVEMENT; BINDING SO - British Journal of Pharmacology 2001 ;132(6):1292-1298 4595 UI - 13561 AU - Williams F AU - Meenagh A AU - Darke C AU - Acosta A AU - Daar AS AU - Gorodezky C AU - Hammond M AU - Nascimento E AU - Middleton D AD - City Hosp, No Ireland Reg Histocompatibil & Immunogenet Lab, Belfast BT9 7TS, Antrim, North IrelandUniv Ulster, Coleraine BT52 1SA, Londonderry, North IrelandQueens Univ Belfast, Belfast, Antrim, North IrelandUniv Fed Minas Gerais, Inst Biol Sci, Belo Horizonte, MG, BrazilUniv Fed Minas Gerais, Hosp Sao Geraldo, Belo Horizonte, MG, BrazilNatal Inst Immunol, Transplantat Unit, Durban, South AfricaNatal Inst Immunol, Transplantat Unit, Mexico City, DF, MexicoINDRE, SSA, Dept Immunogenet, Mexico City, DF, MexicoSultan Qaboos Univ, Transplant Immunol Lab, Muscat, OmanInst Finlay, Ciudad Habana, CubaWelsh Blood Serv, Welsh Transplantat & Immunogenet Lab, Cardiff, S Glam, WalesMiddleton, D, City Hosp, No Ireland Reg Histocompatibil & Immunogenet Lab, Belfast BT9 7TS, Antrim, North Ireland TI - Analysis of the distribution of HLA-B alleles in populations from five continents AB - A two stage PCR-SSOP typing procedure, that permitted WLA-B allele assignment, was applied to DNA samples obtained from six diverse populations -Brazilian, Mexican (Series and Mestizos), Cuban (Caucasoid and Mulatto), South African Zulu, Omani, and Singapore Chinese. HLA-B allele frequencies and HLA-A/B two locus haplotype frequencies were compiled for each population. Human Immunology 62, 645-650 (2001). (C) American Society for Histocompatibility and Immunogenetics, 2001. Published by Elsevier Science Inc MH - Brazil MH - Cuba MH - Mexico|Distrito Federal MH - United Kingdom MH - Oman MH - South Africa PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 24 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000169100500010 L2 - high resolution;DNA typing;HLA-B;SSO;HAPLOTYPE FREQUENCIES; DONORS; HLA-A-ASTERISK-02; HETEROGENEITY; POLYMORPHISM; EVOLUTION; SUBTYPES; HLA-DRB1; HLA-B35; GENE SO - Human Immunology 2001 ;62(6):645-650 4596 UI - 13460 AU - Williams PM AU - Kidger MR AU - van der Hucht KA AU - Morris PW AU - Tapia M AU - Perinotto M AU - Morbidelli L AU - Fitzsimmons A AU - Anthony DM AU - Caldwell JJ AU - Alonso A AU - Wild V AD - Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandInst Astrofis Canarias, E-38200 Santa Cruz De Tenerife, SpainSpace Res Org Netherlands, NL-3584 CA Utrecht, NetherlandsCALTECH, IPAC, SSC, Pasadena, CA 91125, USAUniv Nacl Autonoma Mexico, Inst Astron, Ensenada, Baja California, MexicoUniv Florence, Dipartimento Astron & Sci Spazio, I-50125 Florence, ItalyCNR, CAISMI, I-50125 Florence, ItalyQueens Univ Belfast, Dept Phys, APS Div, Belfast BT7 1NN, Antrim, North IrelandYork Univ, Dept Phys & Astron, N York, ON M3J 1P3, CanadaWilliams, PM, Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - Episodic dust formation by HD 192641 (WR 137) - II AB - We present new infrared photometry of the WC7-type Wolf-Rayet star HD 192641 (WR 137) from 1985 to 1999, These data track the cooling of the dust cloud formed in the 1982-84 dust-formation episode from 1985 to 1991, the increase of the infrared flux from 1994.5 to a new dust-formation maximum in 1997 and its subsequent fading, From these and earlier data we derive a period of 4765 +/- 50d (13.05 +/- 0.15 yr) for the dust-formation episodes. Between dust-emission episodes, the infrared spectral energy distribution has the form of a power law lambdaF(lambda proportional to) lambda (-1.86) . The rising branch of the infrared light curve (1994-97) differs in form from that of the episodic dust-maker WR 125, Time-dependent modelling shows that this difference can be attributed to a different time dependence of dust formation in WR 137, which occurred approximately proportional tot(2) until maximum, whereas that of WR 125 could be described by a step function, akin to a threshold effect. For an adopted distance of 1.6 kpc, the rate of dust formation was found to be 5.0 x 10(-8) M-circle dot yr(-1) at maximum, accounting for a fraction f(c) approximate to 1.5 x 10(-3) of the carbon flowing in the stellar wind. The fading branches of the light curves show evidence for secondary 'mini-eruptions' in 1987, 1988 and 1990, behaviour very different from that of the prototypical episodic dust-maker HD 193793 (`WR 140), and suggesting the presence in the WR 137 stellar wind of large-scale structures that are crossed by the wind-wind collision region MH - Canada MH - Italy MH - Mexico|Baja California MH - Netherlands MH - United Kingdom MH - Spain MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000169352700020 L2 - circumstellar matter;stars : individual : WR 137;stars : Wolf-Rayet infrared : stars;WOLF-RAYET STARS; NEAR-INFRARED SPECTROSCOPY; O-TYPE STARS; OPTICAL SPECTROPHOTOMETRY; WIND COLLISION; CARBON GRAINS; PHOTOMETRY; WR-137; LINES; CLASSIFICATION SO - Monthly Notices of the Royal Astronomical Society 2001 ;324(1):156-166 4597 UI - 12012 AU - Winternitz P AU - Wolf KB AU - Pogosyan GS AU - Sissakian AN AD - Univ Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Dept Math & Stat, Montreal, PQ H3C 3J7, CanadaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoJoint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna, Moscow Oblast, RussiaWinternitz, P, Univ Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, Canada TI - Graf's addition theorem obtained from SO(3) contraction AB - We show that Graf's addition theorem for Bessel functions is obtained by contraction of the composition formula for SO(3) rotations MH - Canada MH - Mexico|Morelos MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0040-5779 UR - ISI:000173055900005 L2 - LIE-ALGEBRAS; SEPARATION; VARIABLES SO - Theoretical and Mathematical Physics 2001 ;129(2):1501-1503 4598 UI - 12233 AU - Wisniak J AU - Infante R AU - Peralta RD AU - Ramos LF AD - Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelCtr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoWisniak, J, Ben Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, Israel TI - Excess molar volume of 2,2 '-oxybis[propane] with benzene, toluene, cyclohexane, and methyl ethanoate at 298.15 K AB - Densities of the binary systems 2,2'-oxybis [propane] with benzene, toluene, cyclohexane, and methyl ethanoate have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densitometer. The calculated excess volumes were correlated with the Redlich-Kister equation and with Legendre's polynomials. The excess volumes are negative for the systems of 2,2'oxybis[propane] with benzene and toluene and positive with cyclohexane and methyl ethanoate MH - Israel MH - Mexico|Coahuila PB - PHILADELPHIA: GORDON BREACH PUBLISHING, TAYLOR & FRANCIS GROUP RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-9104 UR - ISI:000172586700008 L2 - excess thermodynamic properties;liquid mixtures;1,1-DIMETHYLETHYL ETHER; DENSITIES SO - Physics and Chemistry of Liquids 2001 ;39(5):625-636 4599 UI - 13136 AU - Wolf JHD AU - Konings CJF AD - Colegio La Frontera Sur, San Cristobal De Casas, Chiapas, MexicoWolf, JHD, Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, Hugo de Vries Lab, POB 94062, NL-1090 GB Amsterdam, Netherlands TI - Toward the sustainable harvesting of epiphytic bromeliads: a pilot study from the highlands of Chiapas, Mexico AB - For the immediately threatened forests and bromeliads in the highlands of Chiapas, Mexico, we suggest an empirical approach to attain sustainability in the gathering of bromeliads for home decoration. On the basis of theoretical considerations and the results from a pilot study in three forest stands along a disturbance gradient at La Florecilla, we propose that harvesting should be limited to populations (1) that have a density no less than 9000 large rosettes/ha, (2) that are evenly distributed in space, and (3) that grow in the lower stratum of the forest, thus having little effect on their reproductive capacity. In a second study at La Florecilla we used a plotless point-centred quarter method to estimate the population density and homogeneity in spatial distribution of all species of bromeliads in the structurally heterogeneous forest. We found one species, Tillandsia vicentina, that met the prerequisites, having both a satisfactory average population density of ca. 24,000 large ( > 20 cm) rosettes/ha on oaks and a spatially even distribution. We estimate that an annual harvest of 112,000 rosettes of T. vicentina from the lower stratum of the 160 ha forest at La Florecilla can be maintained, in a 4-year rotation cycle. The implementation of a monitoring program should be included in any management plan. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Chiapas MH - Netherlands PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000170364700004 L2 - Bromeliaceae;canopy farming;factor-ceiling distribution;non-timber forest product;pine-oak forest;sustainable yield;SPECIES CONSERVATION; ALTITUDINAL GRADIENT; VIABILITY ANALYSES; CENTRAL VERACRUZ; MONTANE FOREST; NORTHERN ANDES; POPULATION; DIVERSITY; COMMUNITIES; DYNAMICS SO - Biological Conservation 2001 ;101(1):23-31 4600 UI - 12270 AU - Worrell E AU - Price L AU - Martin N AU - Hendriks C AU - Meida LO AD - Univ Calif Berkeley, Lawrence Berkeley Lab, Energy Anal Dept, Berkeley, CA 94720, USAEcofys, NL-3503 RK Utrecht, NetherlandsNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoWorrell, E, Univ Calif Berkeley, Lawrence Berkeley Lab, Energy Anal Dept, Berkeley, CA 94720 USA TI - Carbon dioxide emissions from the global cement industry AB - The cement industry contributes about 5% to global anthropogenic CO2 emissions, making the cement industry an important sector for CO2-emission mitigation strategies. CO2 is emitted from the calcination process of limestone, from combustion of fuels in the kiln, as well as from power generation. In this paper, we review the total CO2 emissions from cement making, including process and energy-related emissions. Currently, most available data only includes the process emissions. We also discuss CO2 emission mitigation options for the cement industry. Estimated total carbon emissions from cement production in 1994 were 307 million metric tons of carbon (MtC), 160 MtC from process carbon emissions, and 147 MtC from energy use. Overall, the top 10 cement-producing countries in 1994 accounted for 63% of global carbon emissions from cement production. The average intensity of carbon dioxide emissions from total global cement production is 222 kg of CA of cement. Emission mitigation options include energy efficiency improvement, new processes, a shift to low carbon fuels, application of waste fuels, increased use of additives in cement making, and, eventually, alternative cements and CO2 removal from flue gases in clinker kilns MH - USA MH - Mexico|Distrito Federal MH - Netherlands PB - PALO ALTO: ANNUAL REVIEWS RP - NOT IN FILE U3 - TC 16 U4 - Energy & Fuels;Engineering, Environmental U5 - J;Review AV - English IS - 1056-3466 UR - ISI:000172551900011 L2 - calcination;climate change;clinker;energy SO - Annual Review of Energy and the Environment 2001 ;26():303-329 4601 UI - 12214 AU - Woudt PA AU - Kraan-Korteweg RC AD - Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South AfricaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoWoudt, PA, Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South Africa TI - A catalogue of galaxies behind the southern Milky Way ? II. The Crux and Great Attractor regions (l approximate to 289 degrees to 338 degrees) AB - In this second paper of the catalogue series of galaxies behind the southern Milky Way, we report on the deep optical galaxy search in the Crux region (289 degrees less than or equal to l less than or equal to 318 degrees and -10 degrees less than or equal to b less than or equal to 10 degrees) and the Great Attractor region (316 degrees less than or equal to l less than or equal to 338 degrees and -10 degrees less than or equal to b less than or equal to 10 degrees). The galaxy catalogues are presented, a brief description of the galaxy search given, as well as a discussion on the distribution and characteristics of the uncovered galaxies. A total of 8182 galaxies with major diameters D greater than or similar to 0.'2 were identified in this similar to 850 square degree area: 3759 galaxies in the Crux region and 4423 galaxies in the Great Attractor region. Of the 8182 galaxies, 229 (2.8%) were catalogued before in the optical (3 in radio) and 251 galaxies have a reliable (159), or likely (92) cross-identification in the IRAS Point Source Catalogue (3.1%). A number of prominent overdensities and filaments of galaxies are identified. They are not correlated with the Galactic foreground extinction and hence indicative of extragalactic large-scale structures. Redshifts obtained at the South African Astronomical Observatory (SAAO) for 518 of the newly catalogued galaxies in the Crux and Great Attractor regions (Fairall et al. 1998; Woudt et al. 1999) confirm distinct voids and clusters in the area here surveyed. With this optical galaxy search, we have reduced the width of the optical "Zone of Avoidance" for galaxies with extinction-corrected diameters larger than 1.3 arcmin from extinction levels A(B) greater than or equal to 1.(m)0 to A(B) greater than or equal to 3.(m)0: the remaining optical Zone of Avoidance is now limited by \b\ less than or similar to 3 degrees (see Fig. 16) MH - Mexico|Guanajuato MH - South Africa PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1432-0746 UR - ISI:000172620600009 L2 - catalogues;surveys;ISM : dust, extinction;galaxies : fundamental parameters;cosmology : large-scale structure of the Universe;LARGE-SCALE STRUCTURES; IRAS GALAXIES; ELLIPTICAL GALAXIES; REDSHIFT SURVEY; AVOIDANCE; ZONE; EXTENSION; CLUSTER; NEARBY; DUST SO - Astronomy & Astrophysics 2001 ;380(2):441-459 4602 UI - 13531 AU - Wright TF AU - Toft CA AU - Enkerlin-Hoeflich E AU - Gonzalez-Elizondo J AU - Albornoz M AU - Rodriguez-Ferraro A AU - Rojas-Suarez F AU - Sanz V AU - Trujillo A AU - Beissinger SR AU - Berovides V AU - Galvez X AU - Brice AT AU - Joyner K AU - Eberhard J AU - Gilardi J AU - Koenig SE AU - Stoleson S AU - Martuscelli P AU - Meyers JM AU - Renton K AU - Rodriguez AM AU - Sosa-Asanza AC AU - Vilella FJ AU - Wiley JW AD - Univ Maryland, Dept Biol, College Pk, MD 20742, USAUniv Calif Davis, Ctr Populat Biol, Davis, CA 95616, USACtr Calidad Ambiental, Monterey 64849, NL, MexicoProvita, Caracas 1041A, VenezuelaUniv Calif Berkeley, Ecosyst Sci Div, Berkeley, CA 94720, USAUniv La Habana, Fac Biol, Habana, CubaUniv Calif Davis, Dept Avian Sci, Davis, CA 95616, USAPrinceton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08540, USAWildlife Preservat Trust Int, St Lucia, W Ind Assoc StYale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511, USAInst Insularis, BR-11750970 Peruibe, SP, BrazilUniv Kent, Durrell Inst Conservat & Ecol, Canterbury CT2 7NS, Kent, EnglandNatl Biol Serv, Patuxent Wildlife Res Ctr, Palmer, PR 00721, USAUniv Autonoma Chiriqui, Escuela Biol, David, PanamaUniv Georgia, Inst Ecol, Athens, GA 30602, USAMississippi State Univ, Dept Wildlife & Fisheries, Mississippi State, MS 39762, USAGrambling State Univ, Grambling Cooperat Wildlife Project, Grambling, LA 71245, USAWright, TF, Univ Maryland, Dept Biol, College Pk, MD 20742, USA TI - Nest poaching in neotropical parrots AB - Although the poaching of nestlings for the pet trade is thought to contribute to the decline of many species of parrots, its effects have been pool ly demonstrated We calculated rats of mortality due to nest Poaching in 23 studies of Neotropical parrots, representing 4024 nesting attempts in 21 species and 14 countries We also examined how poaching rates vary with with geographic region, presence of active protection programs conservation status and economic value of a species, and passage of the U.S. Wild Bird Conservation Act. The average poaching rate across all studies was 30% of all nests observed. Thirteen studies reported poaching rates of greater than or equal to 20%, and four reported rates of >70%. Only six studies documented no nest poaching. Of these, four were conducted on islands in the Caribbean region, which had significantly lower poaching rates than the mainland Neotropics. The other two studies that showed no poaching were conducted on the two species with the lowest economic value in our sample (U.S. retail price). In four studies that allowed direct comparison between poaching at sites with active nest protection versus that at unprotected sites poaching rates were significantly lower at protected sites, suggesting that active protection efforts can be effective in reducing nest poaching. In those studies conducted both before and after the passage of the U.S. Wild Bird Conservation Act, Poaching rates were found to be significantly lower following its enactment than in the period before. This result supports the hypothesis that the legal and illegal parrot trades are positively related, rather than inversely related as has been suggested by avicultural interests. Overall, our study indicates that poaching of parrot nestlings for economic gain is a widespread and biologically significant source of nest mortality in Neotropical parrots MH - Brazil MH - Cuba MH - United Kingdom MH - Mexico|Nuevo Leon MH - Panama MH - USA MH - Venezuela MH - W Ind Assoc St PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 27 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000169226000018 L2 - CONSERVATION; ISLAND; BIOLOGY; BRAZIL SO - Conservation Biology 2001 ;15(3):710-720 4603 UI - 12264 AU - Wu LQ AU - Chen TH AU - Wallace KK AU - Vazquez-Duhalt R AU - Payne GF AD - Univ Maryland, Maryland Biotechnol Inst, Ctr Agr Biotechnol, College Pk, MD 20742, USAUniv Maryland Baltimore Cty, Dept Chem & Biochem Engn, Baltimore, MD 21250, USAUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoPayne, GF, Univ Maryland, Maryland Biotechnol Inst, Ctr Agr Biotechnol, 5115 Plant Sci Bldg, College Pk, MD 20742 USA TI - Enzymatic coupling of phenol vapors onto chitosan AB - Phenols are important industrial chemicals, and because they can be volatile, also appear as air pollutants. We examined the potential of tyrosinase to react with the volatile phenol p-cresol. Three lines of evidence support the conclusion that volatile phenols react with tyrosinase and are coupled (i.e., chemisorbed) onto chitosan films. First, phenol-trapping studies indicated that p-cresol can be removed from vapors if the vapors are contacted with tyrosinase-coated chitosan films. Second, the ultraviolet absorbance of tyrosinase-coated chitosan films changes dramatically when they are contacted with cresol-containing vapors, whereas control films are unaffected by contacting with cresol vapors. Third, pressure measurements indicate that tyrosinase-coated chitosan films only react with cresol vapors if the oxygen cosubstrate is present. Additional studies demonstrate the potential of tyrosinase-coated chitosan films/membranes for the detection and removal of phenol vapors. (C) 2001 John Wiley & Sons, Inc MH - USA MH - Mexico|Morelos PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 10 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000172524200007 L2 - chitosan;gas phase;phenols;tyrosinase;vapor phase;IMMOBILIZED POLYPHENOL OXIDASE; QUINONE-AMINE POLYMERS; TYROSINASE REACTION; SELECTIVE REMOVAL; AROMATIC-AMINES; WASTE-WATER; PHASE; ADSORPTION; OXIDATION; SYSTEM SO - Biotechnology and Bioengineering 2001 ;76(4):325-332 4604 UI - 13146 AU - Wu W AU - Weber T AU - Chatfield D AU - Cornejo-Bravo J AD - San Diego State Univ, Dept Chem, San Diego, CA 92182, USAUniv Autonoma Baja California, Sch Chem & Engn, Mexicali 21100, Baja California, Mexico TI - Parotid saliva as biomarker to monitor environmental exposure MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000168824702116 SO - Abstracts of Papers of the American Chemical Society 2001 ;221():U275-U275 4605 UI - 12369 AU - Wynen LP AU - Goldsworthy SD AU - Insley SJ AU - Adams M AU - Bickham JW AU - Francis J AU - Gallo JP AU - Hoelzel AR AU - Majluf P AU - White RWG AU - Slade R AD - Univ Tasmania, Antarct Wildlife Res Unit, Hobart, Tas, AustraliaUniv Tasmania, Sch Zool, Hobart, Tas, AustraliaSmithsonian Inst, Natl Zool Pk, Res Dept, Washington, DC 20008, USAS Australian Museum, Evolut Biol Unit, Adelaide, SA 5000, AustraliaTexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX, USANatl Geog Soc, Washington, DC, USACiad Guaymas Carretera & Varadero Nacl, Guaymas, MexicoUniv Durham, Dept Sci Biol, Durham, EnglandUniv Queensland, Australian Genome Res Facil, Brisbane, Qld, AustraliaSo Cross Univ, So Cross Inst Whale Res, Lismore, AustraliaWynen, LP, Forens Sci Serv Tasmania, 20 St Johns Ave, Newtown, Tas 7008, Australia TI - Phylogenetic relationships within the eared seals (Otariidae : Carnivora): Implications for the historical biogeography of the family AB - Phylogenetic relationships within the family Otariidae were investigated using two regions of the mitochondrial genome. A 360-bp region of the cytochrome b gene was employed for the primary phylogenetic analysis, while a 356-bp segment of the control region was used to enhance resolution of the terminal nodes. Traditional classification of the family into the subfamilies Arctocephalinae (fur seals) and Otariinae (sea lions) is not supported, with the fur seal Callorhinus ursinus having a basal relationship relative to the rest of the family. This is consistent with the fossil record which suggests that this genus diverged from the line leading to the remaining fur seals and sea lions about 6 million years ago (mya). There is also little evidence to support or refute the monophyly of sea lions. Four sea lion clades and five far seal clades were observed, but relationships among these clades are unclear. Similar genetic divergences between the sea lion clades (D-a = 0.054-0.078), as well as between the major Arctocephalus far seal clades (D-a = 0.040-0.069) suggest that these groups underwent periods of rapid radiation at about the time they diverged from each other. Rapid radiations of this type make the resolution of relationships between the resulting species difficult and indicate the requirement for additional molecular data from both nuclear and mitochondrial genes. The phylogenetic relationships within the family and the genetic distances among some taxa highlight inconsistencies in the current taxonomic classification of the family. (C) 2001 Academic Press MH - Australia MH - United Kingdom MH - Mexico|Sonora MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000172171700009 L2 - Otariidae;mtDNA;phylogeny;fur seal;sea lion;cytochrome b;control region;FUR SEALS; NUCLEOTIDE-SEQUENCES; POPULATION-STRUCTURE; GENETIC-VARIATION; DNA-SEQUENCE; ARCTOCEPHALUS; EVOLUTION; TREES; PINNIPEDS; MAMMALIA SO - Molecular Phylogenetics and Evolution 2001 ;21(2):270-284 4606 UI - 11935 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Plasmon changes in rectangular quantum dots under one-, two-, and three-dimensional quantum-confinement AB - With an every-electron-count method, we calculate the quantum-confinement induced changes in the small-particle plasmon as manifested in the optical absorption spectrum. The small-particle plasmon, which originates from the local-field modified bulk plasmon, changes for so small particles that the electrons inside are quantum mechanically confined. According to the size and shape of the particle, the quantum confinement can be in one-, two- and three-dimension MH - Mexico|Baja California MH - USA PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4026 UR - ISI:000173396400008 L2 - quantum dot;plasmon change;OPTICAL-PROPERTIES; PARTICLES; SPHERES SO - Optik 2001 ;112(11):537-540 4607 UI - 12590 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Equivalent-circuit interpretation of the dielectric dispersion in ferroelectric superlattice capacitor AB - We present an alternative explanation to the dielectric dispersion at low frequency in ferroelectric superlattice capacitors. The dispersions were recently observed and attributed to the Maxwell-Wagner effects in O'Neil et al. [Appl. Phys. Lett., 77, (2000) 1520]. We alternatively explain the observations based on an equivalent circuit. For small stack periodicities that are less than a few angstroms, the model reaches similar conclusions that the Maxwell-Wagner effects contribute to the dielectric loss at low frequencies. For larger stack periodicities, the model interprets correctly the observations in O'Neil et al. Finally, the model appears useful for understanding dielectric responses in relaxor ferroelectrics, and thus suggests that stacking various ferroelectric thin films may produce relaxor responses. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000171736000008 L2 - ferroelectrics;relaxor ferroelectrics;dielectric;dispersion;PULSED-LASER DEPOSITION; RELAXOR FERROELECTRICS; THIN-FILMS; GLASSY; MODEL SO - Materials Letters 2001 ;51(2):135-138 4608 UI - 12817 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Competing intra- and inter-band transitions in quantum dots as manifested in optical absorption spectra AB - We have theoretically studied the optical absorption spectra of spheric gold particles of radius as small as several angstroms to several nanometers. In these particles the number of valence electrons ranges from about 10 to 10(5). The electrons are so confined that their movements under external electromagnetic field have to be treated within quantum mechanics. Two apparent transitions, namely intra- and inter-band transitions, as well as their relation with the classic small-particle resonance omega (p)/root3 (omega (p) is plasmon frequency), have been rigorously studied in the framework of the electron-in-a-box model with every-electron-count method. A number of interesting phenomena are observed, which would also be generally applicable to other quantum dot systems. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000171072300008 L2 - SMALL METALLIC PARTICLES; SMALL SPHERE; POLARIZABILITY; MICROSCOPY; SUBSTRATE SO - Physics Letters A 2001 ;288(1):37-40 4609 UI - 13110 AU - Xiao MF AU - Bozhevolnyi SI AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Aalborg, Inst Phys, DK-9220 Aalborg, DenmarkXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA, USA TI - Resonant field enhancement by a finite-size periodic array of surface scatterers AB - Using a microscopic point-dipole description of light scattering by surface particles, we investigate evolution of the self-consistent field intensity distribution above a finite-size hexagonal array of surface scatterers when changing the light wavelength. It is found that, for sufficiently strong scatterers, the wavelength dependences of the maximum field intensity exhibit narrow resonances, at which the field is significantly enhanced. We investigate the influence of the system parameters, such as the polarizability of scatterers, wavelength, polarization and angle of incidence of the incoming wave, on the self-consistent field intensity distributions at resonance. Near-field optical probing of the resonant field intensity patterns is also considered MH - Denmark MH - Mexico|Baja California MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000170376300016 L2 - MICROSCOPY; OPTICS; WAVES SO - Journal of Physics-Condensed Matter 2001 ;13(13):3001-3010 4610 UI - 13008 AU - Yacaman MJ AU - Ascencio JA AU - Liu HB AU - Gardea-Torresdey J AD - Texas Mat Inst, Ctr Nano & Mol Technol, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Nacl Invest Nucl, Ocoyoacac 52045, Edo Mex, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAYacaman, MJ, Texas Mat Inst, Ctr Nano & Mol Technol, Austin, TX 78712 USA TI - Structure shape and stability of nanometric sized particles AB - Nanoparticles are a state of matter that has properties different from either molecules or bulk solids. In the present work, we review the shape and structure of nanometer-sized particles; several shapes are discussed, such as the octahedron and truncated octahedron, the icosahedron, the Marks decahedron, the truncated "star-like" decahedron, the rounded decahedron and the regular decahedron. Experimental high-resolution transmission electron microscopy (TEM) images of each type of particle are presented together with the Fast Fourier Transform and a model of the particle. We consider only gold particles grown by vapor deposition or by colloidal methods. High-resolution TEM images of the particles in different orientations are shown. We discuss two basic types of particles uncapped and capped. Data for other metals and semiconductors are reviewed. We have also performed very extensive simulations obtaining the total energy and pair correlation functions for each cluster under study. Furthermore, distributions of single atom energy for every cluster are displayed in order to reveal the effect of surface on the stability of different types and sizes of clusters. We discuss the structure of the particles from similar to1 to similar to 100 nm. The mechanisms for stress release as the particles grow larger are reviewed and a mechanism is suggested. Finally, we discuss the parameters that define the shape of a nanoparticle and the possible implications in technological applications. (C) 2001 American Vacuum Society MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 79 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Review AV - English IS - 1071-1023 UR - ISI:000170598400001 L2 - VAPOR-DEPOSITED PARTICLES; SMALL METAL PARTICLES; ELECTRON-MICROSCOPE; GOLD CLUSTERS; SILVER; NANOPARTICLES; CRYSTALS; FLUCTUATIONS; ENERGETICS; RELAXATION SO - Journal of Vacuum Science & Technology B-An International Journal Devoted to Microelectronics and Nanometer Structures-Processing Measurement and Phenomena 2001 ;19(4):1091-1103 4611 UI - 13348 AU - Yacaman MJ AU - Ascencio JA AU - Canizal G AD - Univ Texas, Dept Chem Engn, Ctr Nano & Mol Technol, Texas Mat Inst, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Nacl Invest Nucl, Gerencia Innovac Tecnol, Ocoyoacac 52045, Edo Mexico, MexicoYacaman, MJ, Univ Texas, Dept Chem Engn, Ctr Nano & Mol Technol, Texas Mat Inst, Austin, TX 78712 USA TI - Observation of surface relaxation surface steps and surface reconstruction in gold nanorods AB - In this paper, it is reported a surface analysis of gold nanorods irradiated by the electron beam of a transmission electron microscope. The gold nanorods were synthesised by a bioreduction process. A transmission electron microscope was used to obtain high resolution images of the nanorod structure, which were digitally processed in order to identify the facets and surface changes. Besides, molecular simulation tools were also applied to obtain a model and to analyse the stability of these structures. Evidences of distortions were observed the (111) and (110) surfaces, which include facet reconstruction and it is shown the necessity to include the twinning of the long nanorods that looks to be a very common case. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Letter AV - English IS - 0039-6028 UR - ISI:000169686400002 L2 - electron microscopy;gold;stepped single crystal surfaces;surface structure, morphology, roughness, and topography;surface relaxation and reconstruction;metallic surfaces SO - Surface Science 2001 ;486(1-2):L449-L453 4612 UI - 6157 AU - Yakovlev V AU - Korjik V AU - Sinuk A AD - State Univ Telecommun, St Petersburg, RussiaIPN, CINVESTAV, Sect Telecommun, Mexico City, DF, MexicoYakovlev, V, State Univ Telecommun, St Petersburg, Russia TI - Key distribution protocol based on noisy channel and error detecting codes AB - Secret key agreement based on noisy channel connecting parties and on public discussion has been considered in [1-4] for asymptotic case. Extension of the information-theoretically secure key sharing concept to non-asymptotic case was given in [5]. In the last paper several channel transform protocols (corresponding to different algorithms of public discussion) were presented. Unfortunately the efficiency of these protocols was very low in comparison with asymptotic key capacity found in [1]. The reason of this was that these protocols do not use a redundancy efficiently. One of the considered protocols (the so-called advantage to the main channel primitive) exploits a repetition of binary symbols only. It may be much better to use linear error detecting codes, that is just a subject of consideration in the current paper. We regain the main formulas to compute Renyi entropy which is necessary to bound the information about the final key leaking to an eavesdropper after execution of such modificated protocol. The use of this protocol causes an increase in the key-rate by several times, that is very important in practical implementations of key sharing procedures MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000189224600024 L2 - PRIVACY AMPLIFICATION; INFORMATION SO - Information Assurance in Computer Networks: Methods, Models and Architectures for Network Security, Proceedings 2001 ;2052():242-250 4613 UI - 12914 AU - Yamaleev RM AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Dept Fis, Mexico City 54740, DF, MexicoJoint Inst Nucl Res Dubna, Dubna, RussiaYamaleev, RM, Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Dept Fis, Mexico City 54740, DF, Mexico TI - Generalized Lorentz-force equations AB - Guided by Nambu (n + 1)-dimensional phase space formalism we build a new system of dynamic equations. These equations describe a dynamic state of the corporeal system composed of n subsystems. The dynamic equations are formulated in terms of dynamic variables of the subsystems as well as in terms of dynamic variables of the corporeal system. These two sets of variables are related respectively as roots and coefficients of the n-degree polynomial equation. In the special n = 2 case, this formalism reproduces relativistic dynamics for the charged spinning particles. (C) 2001 Academic Press MH - Mexico|Distrito Federal MH - Russia PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000170927400003 L2 - NAMBU MECHANICS; HAMILTONIAN DYNAMICS; MOTION SO - Annals of Physics 2001 ;292(2):157-178 4614 UI - 12975 AU - Yan WK AU - Cornelius PL AU - Crossa J AU - Hunt LA AD - Univ Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, CanadaUniv Kentucky, Dept Agron, Lexington, KY 40546, USAUniv Kentucky, Dept Stat, Lexington, KY 40546, USACIMMYT, Biometr & Stat Unit, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoYan, WK, Univ Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, Canada TI - Two types of GGE biplots for analyzing multi-environment trial data AB - SA genotype main effect plus genotype X environment interaction (GGE) biplot graphically displays the genotypic main effect (G) and the genotype X environment interaction (GE) of the multienvironment trial (MET) data and facilitates visual evaluation of both the genotypes and the environments. This paper compares the merits of two types of GGE biplots in MET data analysis. The first type is constructed by the least squares solution of the sites regression model (SREG(2)), with the first two principal components as the primary and secondary effects, respectively. The second type is constructed by Mandel's solution for sites regression as the primary effect and the first principal component extracted from the regression residual as the secondary effect (SREG(M+1)). Results indicate that both the SREG2 biplot and the SREG(M+1) biplot are equally effective in displaying the "which-won-where" pattern of the MET data, although the SREG2 biplot explains slightly more GGE variation. The SREG(M+1) biplot is more desirable, however, in that it always explicitly indicates the average yield and stability of the genotypes and the discriminating ability and representativeness of the test environments MH - Canada MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 25 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170696200006 SO - Crop Science 2001 ;41(3):656-663 4615 UI - 13837 AU - Yang ZH AU - Rendon A AU - Flores A AU - Medina R AU - Ijaz K AU - Llaca J AU - Eisenach KD AU - Bates JH AU - Villarreal A AU - Cave MD AD - Cent Arkansas Vet Healthcare Syst, Med Res Serv, Reg TB Genotyping Lab, Little Rock, AR 72205, USAUniv Arkansas Med Sci, Dept Med, Little Rock, AR 72205, USAUniv Michigan, Dept Epidemiol, Ann Arbor, MI 48109, USAUniv Hosp Monterrey, Pulm Serv & Clin Pathol Lab, Monterrey, Nuevo Leon, MexicoUniv Arkansas Med Sci, Dept Immunol Microbiol, Little Rock, AR 72205, USAUniv Arkansas Med Sci, Dept Pathol, Little Rock, AR 72205, USAArkansas Dept Hlth, Little Rock, AR 72205, USASecretary Hlth Nuevo Leon, Sect Chron & Degenerat Dis, Monterrey, Nuevo Leon, MexicoUniv Arkansas Med Sci, Dept Anat, Little Rock, AR 72205, USACave, MD, Cent Arkansas Vet Healthcare Syst, Med Res Serv, Reg TB Genotyping Lab, LR-151,4300 W 7th St, Little Rock, AR 72205 USA TI - A clinic-based molecular epidemiologic study of tuberculosis in Monterrey, Mexico AB - SETTING: A tuberculosis clinic associated with a university hospital in Monterrey, Mexico, an urban community with high tuberculosis incidence. OBJECTIVE: To determine the diversity of DNA finger-print patterns and the extent of drug resistance of Mycobacterium tuberculosis isolates from patients who attended the clinic. DESIGN: Isolates of M. tuberculosis obtained from 186 patients during the period from 31 January 1996 to 31 March 1998 were tested for susceptibility to isoniazid, rifampicin, ethambutol and streptomycin. Demographic data and the social history of each patient were obtained prospectively by interview. The IS6110 DNA finger-prints were obtained for 166 of the 186 isolates. Secondary typing was carried out on isolates with fewer than six copies of IS6110. RESULTS: Thirty-two per cent of the tested isolates (60/186) were drug-resistant, and 18% (33/186) were multidrug-resistant. Approximately 55% of the resistant isolates (33/60) were attributed to acquired resistance. A total of 106 different IS6110 fingerprint patterns were observed among the 166 fingerprinted isolates. Based on both IS6110 and pTBN12 fingerprinting, 65 (39%) of the 166 isolates were part of 22 DNA fingerprint clusters. Various drug susceptibility patterns were seen in most clusters. CONCLUSION: Fingerprint clustering indicates extensive recent transmission of tuberculosis in patients attending the clinic. The prevalence of drug-resistant tuberculosis is high MH - USA MH - Mexico|Nuevo Leon PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 7 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000168359400005 L2 - tuberculosis;epidemiology;DNA fingerprinting;drug resistance;MYCOBACTERIUM-TUBERCULOSIS; TRANSMISSION; NATIONWIDE SO - International Journal of Tuberculosis and Lung Disease 2001 ;5(4):313-320 4616 UI - 13590 AU - Yebra-Pimentel E AU - Giraldez MJ AU - Arias FL AU - Gonzalez J AU - Gonzalez JM AU - Parafita MA AU - Febrero M AD - Univ Santiago de Compostela, Sch Opt & Optometry, Dept Appl Phys, Optometry Grp, Galicia 15706, SpainUniv Santiago de Compostela, Sch Opt & Optometry, Dept Ophthalmol, Galicia 15706, SpainUniv Santiago de Compostela, Fac Math, Dept Stat & OR, Galicia 15706, SpainUniv Autonoma Aguascalientes, Dept Optometry, Mexico City, DF, MexicoYebra-Pimentel, E, Univ Santiago de Compostela, Sch Opt & Optometry, Dept Appl Phys, Optometry Grp, Galicia 15706, Spain TI - Rigid gas permeable contact lens and corneal topography AB - We investigated the effect of high Dk daily wear rigid gas permeable contact lenses on corneal topography. Eight young myopic subjects wore hard contact lenses for 21 days. Corneal topography was monitored using the EyeSys system. It was measured every day during the next 21 days after the fitting. We recorded the corneal radius of curvature at 16 peripheral points approximately 1, 2, 3 and 4 mm along the four principal meridians (nasal, superior, inferior and temporal). Our study showed that daily wear RGP Forum 210 does not produce significant alterations of the corneal curvature as a function of time. (C) 2001 The College of Optometrists. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Article AV - English IS - 0275-5408 UR - ISI:000168862500007 SO - Ophthalmic and Physiological Optics 2001 ;21(3):236-242 4617 UI - 12680 AU - Young BE AU - Lips KR AU - Reaser JK AU - Ibanez R AU - Salas AW AU - Cedeno JR AU - Coloma LA AU - Ron S AU - La Marca E AU - Meyer JR AU - Munoz A AU - Bolanos F AU - Chaves G AU - Romo D AD - Assoc Biodivers Informat, Arlington, VA 22209, USASo Illinois Univ, Dept Zool, Carbondale, IL 62901, USAUS Dept State, Off Ecol & Terr Conservat, Washington, DC 20520, USASmithsonian Trop Res Inst, Balboa, PanamaUniv Ricardo Palma, Museo Hist Nat, Lima 33, PeruEl Colegio Frontera Sur, Chetumal, Quintana Roo, MexicoPontificia Univ Catolica Ecuador, Museo Zool, Quito, EcuadorUniv Los Andes, Fac Ciencias Forestales & Ambientales, Lab Biogeog, Merida 5101A, VenezuelaNavajo Nat Heritage Program, Window Rock, AZ 86515, USAEl Colegio Frontera Sur, Chiapas, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaUniv San Francisco Quito, Colegio Ciencias Ambientales, Quito, EcuadorYoung, BE, Assoc Biodivers Informat, 1101 Wilson Blvd, Arlington, VA 22209 USA TI - Population declines and priorities for amphibian conservation in Latin America AB - Although dramatic amphibian population declines have been reported worldwide, our understanding of the extent of the declines in Latin America, where amphibian diversity is high, is limited to a few well-documented studies. To better understand the geographic extent of declines, their possible causes, and the measures needed to improve Latin American scientists' ability to research the phenomenon and make effective management recommendations, we convened three regional workshops with 88 Latin American herpetologists and conservationists. Population declines are widespread in Latin America. At least 13 countries have experienced declines, and in 40 cases species are now thought to be extinct or extirpated in a country where they once occurred. Declines or extinctions have affected 30 genera and nine families of amphibians. Most declines have occurred in remote highlands, above 500 m in elevation in Central America and above 1000 m In the Andes. Most documented declines occurred in the 1980s. Of the possible causes studied to date, climate change appears to be important at one site and chytrid fungal disease has been identified at sites in three countries. Although many monitoring studies are currently underway in a variety of habitats, most studies are recent and of short duration. In a signed resolution, workshop participants called for greater collaboration and communication among scientists working in Latin America to understand the geographic extent of population declines and the distribution of possible causal factors. In situ conservation is important to protect habitats, but captive-rearing programs for species subject to imminent extinction are also needed. Better understanding of the taxonomy and natural history of amphibians and more funding for research and monitoring are critical to developing a scientific basis for management action to arrest and reverse population declines MH - USA MH - Costa Rica MH - Ecuador MH - Mexico|Chiapas MH - Mexico|Quintana Roo MH - Panama MH - Peru MH - Venezuela PB - MALDEN: BLACKWELL SCIENCE INC RP - NOT IN FILE U3 - TC 69 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Review AV - English IS - 0888-8892 UR - ISI:000171501100004 L2 - UV-B RADIATION; SALAMANDER AMBYSTOMA-TIGRINUM; RAIN-FOREST FROGS; TROPICAL MOUNTAIN; MORTALITY; TOAD; SITE; FLUCTUATIONS; PERSPECTIVE; CALIFORNIA SO - Conservation Biology 2001 ;15(5):1213-1223 4618 UI - 14409 AU - Young JM AU - Kuykendall LD AU - Martinez-Romero E AU - Kerr A AU - Sawada H AD - ARS, Inst Plant Sci, Beltsville Agr Res Ctr, USDA, Beltsville, MD 20705, USALandcare Res, Auckland, New ZealandUNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoNatl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, JapanKuykendall, LD, ARS, Inst Plant Sci, Beltsville Agr Res Ctr, USDA, 10300 Baltimore Ave, Beltsville, MD 20705 USA TI - A revision of Rhizobium Frank 1889, with an emended description of the genus, and the inclusion of all species of Agrobacterium Conn 1942 and Allorhizobium undicola de Lajudie et al. 1998 as new combinations: Rhizobium radiobacter, R-rhizogenes, R-rubi, R-undicola and R-vitis AB - Rhizobium, Agrobacterium and Allorhizobium are genera within the bacterial family Rhizobiaceae, together with Sinorhizobium. The species of Agrobacterium, Agrobacterium tumefaciens (syn, Agrobacterium radiobacter). Agrobacterium rhizogenes, Agrobacterium rubi and Agrobacterium vitis, together with Allorhizobium undicola, form a monophyletic group with all Rhizobium species, based on comparative 16S rDNA analyses. Agrobacterium is an artificial genus comprising plant-pathogenic species. The monophyletic nature of Agrobacterium, Allorhizobium and Rhizobium and their common phenotypic generic circumscription support their amalgamation into a single genus, Rhizobium. Agrobacterium tumefaciens was conserved as the type species of Agrobacterium, but the epithet radiobacter would take precedence as Rhizobium radiobacter in the revised genus. The proposed new combinations are Rhizobium radiobacter, Rhizobium rhizogenes, Rhizobium rubi, Rhizobium undicola and Rhizobium vitis MH - Japan MH - USA MH - Mexico|Morelos MH - New Zealand PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 125 U4 - Microbiology U5 - J;Review AV - English IS - 1466-5026 UR - ISI:000166641100013 L2 - Rhizobiaceae;phenetic;phylogenetic;polyphasic;taxonomy;LEGUMINOSARUM BIOVAR TRIFOLII; ROOT NODULE BACTERIA; CICER-ARIETINUM L; AD-HOC-COMMITTEE; SP-NOV; RIBOSOMAL-RNA; PHYLOGENETIC ANALYSIS; POLYPHASIC TAXONOMY; ASTRAGALUS-SINICUS; MITOCHONDRIAL-DNA SO - International Journal of Systematic and Evolutionary Microbiology 2001 ;51():89-103 4619 UI - 14162 AU - Young JWS AU - Vazquez-Galvez FA AD - SENES Consultants Ltd, Richmond Hill, ON L4B 3N4, CanadaUniv Autonoma Ciudad Juarez, Inst Ingn & Tecnol, Ctr Estudios Medio Ambiente, Ciudad Juarez, MexicoYoung, JWS, SENES Consultants Ltd, 121 Granton Dr,Unit 12, Richmond Hill, ON L4B 3N4, Canada TI - Practical air quality management AB - Monitoring, analysis, and modelling are essential elements of an air quality management plan. It is beneficial to deal with them as an integrated whole. The paper describes Ciudad Chihuahua, Mexico, the development of a new, user friendly, integrated air quality management system (SIMON), and an example of the use of SIMON to examine "good" and "poor" mitigation strategies that could be applied to reduce high pollutant concentrations. The system design and architecture are documented. The five major parts of SIMON are described: an emission inventory module, the meteorological data module, an air quality monitoring module, a modelling-planning module, and a reporting module. The practical use of SIMON is demonstrated through its application to mitigate high concentrations of particulates in one area of the city MH - Canada MH - Mexico|Chihuahua PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Civil U5 - J;Article AV - English IS - 0315-1468 UR - ISI:000167399100019 L2 - air quality;management;urban;applied;sustainable;integrated;strategies;inventory;modelling;analysis SO - Canadian Journal of Civil Engineering 2001 ;28():170-182 4620 UI - 12906 AU - Zaharieva M AU - Gaulin E AU - Havaux M AU - Acevedo E AU - Monneveux P AD - INRA, ENSA, UFR Genet & Ameliorat Plantes, F-34060 Montpellier, FranceCEA Cadarache, DSV, DEVM, Lab Ecophysiol Photosynth, F-13108 St Paul Les Durance, FranceUniv Chile, Fac Ciencias Agr & Forestales, Lab Relac Suelo Agua Planta, Santiago 1004, ChileZaharieva, M, CIMMYT, Wheat Program, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Drought and heat responses in the wild wheat relative Aegilops geniculata Roth: Potential interest for wheat improvement AB - Wild wheat (Triticum aestivum L.) relatives could represent a valuable source of genetic variation for improvement of abiotic stress tolerance in cultivated wheat. A better knowledge of the adaptive strategies developed by these species is needed. A collection of 157 Aegilops geniculata accessions originating from different ecogeographical regions was studied during two successive years for several traits related to water status, chlorophyll content, and plant thermal regulation under Mediterranean field conditions. Close association was found between the studied traits and the origin of accessions. Two adaptive strategies were distinguished. Accessions originating from harsh environments had low biomass, low grain production and high water-use efficiency (low C isotope discrimination). They were early, with small, thick leaves exhibiting low chlorophyll content, high surface temperature and low epidermal transpiration. We suggest that in these accessions, decreased leaf chlorophyll content could limit the energy load from strong sunlight. In accessions originating from regions with a mild Mediterranean climate, thermal regulation of the leaf may rather depend on transpiration, as suggested by high C isotope discrimination values. These accessions also were characterized by high chlorophyll content, leaf area, and biomass production. Associations between the physiological traits observed could help to better understand the relationship between abiotic stress tolerance and yield in cultivated wheats. Results obtained confirmed the potential value of Aegilops geniculata for improvement of high temperature and drought stress tolerance in wheat and could contribute to the choice of traits to be introgressed and the accessions to be used in wide hybridization programs MH - Chile MH - France MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000170881200049 L2 - CARBON-ISOTOPE DISCRIMINATION; WATER-USE EFFICIENCY; TRANSPIRATION EFFICIENCY; DURUM-WHEAT; EPIDERMAL CONDUCTANCE; TRITICUM-AESTIVUM; GAS-EXCHANGE; BARLEY; PHOTOSYNTHESIS; CULTIVARS SO - Crop Science 2001 ;41(4):1321-1329 4621 UI - 13527 AU - Zaharieva M AU - Monneveux P AU - Henry M AU - Rivoal R AU - Valkoun J AU - Nachit MM AD - INRA, ENSA, UFR Genet & Ameliorat Plantes, F-34060 Montpellier, FranceCIMMYT, Mexico City 06600, DF, MexicoINRA, ENSA Rennes, UMR Biol Organismes & Populat Appliquee Protect P, F-35653 Le Rheu, FranceICARDA, GRU, Aleppo, SyriaCIMMYT, ICARDA, Durum Wheat Program, Aleppo, SyriaZaharieva, M, INRA, ENSA, UFR Genet & Ameliorat Plantes, F-34060 Montpellier, France TI - Evaluation of a collection of wild wheat relative Aegilops geniculata Roth and identification of potential sources for useful traits AB - A collection comprising 157 Aegilops geniculata accessions originating from different ecogeographical regions was established at ENSA-INRA, Montpellier. The accessions were studied for physiological traits related to drought and heat stress and screened for resistance to barley yellow dwarf virus (BYDV) and rusts. Some accessions were also tested for resistance to Hessian fly and cereal cyst nematodes (CCN). The study allowed to distinguish different adaptive strategies to the climatic constraints encountered by Aegilops populations in their region of origin. They led to significant differences in biomass and grain production and should be taken into account in the utilisation of Ae. geniculata germplasm in wheat breeding programs. Two accessions with resistance to BYDV were found. Both originated from South of France. The interest of Ae. geniculata as a source of rust resistance was confirmed and accessions with resistance to the three rusts were identified. High resistance against populations of Heterodera avenae and H. latipons was found in accessions from Spain, Bulgaria, Jordan and Tunisia. Sources of resistance to Hessian fly were also identified MH - France MH - Mexico|Distrito Federal MH - Syria PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000169211500005 L2 - Aegilops geniculata;BYDV;cereal cyst nematodes;Hessian fly;physiological traits;resistance;rusts;CARBON-ISOTOPE DISCRIMINATION; DURUM-WHEAT; HESSIAN FLY; PHOTOSYNTHESIS SO - Euphytica 2001 ;119(1-2):33-38 4622 UI - 13370 AU - Zaldivar MH AU - Fernandez P AU - Piqueras J AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Mat, E-28040 Madrid, SpainZaldivar, MH, B Univ Autonoma Puebla, Inst Fis, Puebla 72570, Mexico TI - Study of growth hillocks in GaN : Si films by electron beam induced current imaging AB - Remote electron beam induced current (REBIC) measurements have been carried out to investigate electrically active regions in Si doped GaN films. REBIC bright-dark contrast has been observed in the border of growth, round or pyramidal, hillocks, while pyramidal hillocks also show bright contrast at the center. The results are explained by the inhomogeneous distribution of charged point defects and impurities at the hillocks. (C) 2001 American Institute of Physics MH - Mexico|Puebla MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000169660000077 L2 - GRAIN-BOUNDARIES SO - Journal of Applied Physics 2001 ;90(2):1058-1060 4623 UI - 13653 AU - zamar-Barrios JA AU - Dennis TJS AU - Sadhukan S AU - Shinohara H AU - Scuseria GE AU - Penicaud A AD - Univ Bordeaux 1, Ctr Rech Paul Pascal, CNRS UPR8641, F-33600 Pessac, FranceNagoya Univ, Dept Chem, Nagoya, Aichi 4648602, JapanRice Univ, Dept Chem, Rice Quantum Inst, Houston, TX 77251, USAIPN Merida, CINVESTAV, Dept Fis Aplicada, Merida 97310, Yuc, MexicoPenicaud, A, Univ Bordeaux 1, Ctr Rech Paul Pascal, CNRS UPR8641, Av Schweitzer, F-33600 Pessac, France TI - Characterization of six isomers of [84]fullerene C-84 by electrochemistry, electron spin resonance spectroscopy, and molecular energy levels calculations AB - The electrochemical and electron spin resonance (ESR) fingerprints of six isomers of C-84 [D-2(IV), D-2d(II). D-2d(I), D-2(II), C-2(IV), and C-s(b)] are presented together with density functional theory (DFT) calculations of the molecular orbitals (MO) energy levels for a total of 10 isomers (D-2(IV), D-2d(II), D-2d(I), D-2(II), C-s(V), and Cr(I) to C-s(V)). Comparison between calculations and electrochemical data shows a true synergy between calculated energy levels and experimental redox potentials. Assignments are proposed of the C-2 isomer as C-2(IV) and tentatively of the C-s(b) isomer as C-s(V). The temperature-dependent ESR spectra of D-2(IV) and D-2d(II) singly charged ions show an abrupt change around 150 K which is ascribed to a change of spin state. Additionally, the room-temperature solution ESR spectra of all isomers studied exhibit a fine structure characteristic of each isomer MH - France MH - Japan MH - Mexico|Yucatan MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000168803600006 L2 - C-13 NMR-SPECTROSCOPY; 2 MAJOR ISOMERS; APROTIC-SOLVENTS; MINOR ISOMERS; C-60; FULLERENE; C-78; BUCKMINSTERFULLERENE; ELECTROREDUCTION; SEPARATION SO - Journal of Physical Chemistry A 2001 ;105(19):4627-4632 4624 UI - 13513 AU - Zambrano E AU - Nathanielsz PW AU - McDonald TJ AD - Cornell Univ, Coll Vet Med, Dept Biomed Sci, Lab Pregnancy & Newborn Res, Ithaca, NY 14853, USAInst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoMcDonald, TJ, Cornell Univ, Coll Vet Med, Dept Biomed Sci, Lab Pregnancy & Newborn Res, Box 16, Ithaca, NY 14853 USA TI - Prenatal and postnatal ovine adrenal cell responses to prostaglandin E-2 AB - OBJECTIVE: To examine the secretory effect of prostaglandin E-2 (PGE(2)) and ACTH on the adrenal glands of prenatal and postnatal sheep. METHODS: Immunocytochemistry was used to examine the adrenal cortex and medulla for 17 alpha -hydroxylase and tyrosine hydroxylase immunoreactivity. Microphysiometric technique was used to measure [H+] after exposure of whole dispersed prenatal and postnatal adrenal glands to PGE(2), ACTH, or both. RESULTS: Immunocytochemistry showed many cortical-type cells in all adrenal medullae and many medullary-type cells in fetal adrenal cortices. Maximum H+ responsiveness to PGE(2) decreased with increasing age. The developmental age-related pattern of maximum percentage change in [H+] during ACTH exposure was similar to previous findings with cortisol production as the endpoint. ACTH stimulated H+ production at 80 days' gestation and at all ages greater than 125 days' gestation (P < .05). The molar concentration of ligand required to elicit a response that tvas 50% of maximum response (EC50) for the ACTH response was lower in fetuses than in newborn lambs (<1 day and 3 days old), bmt there was no change in EC50 for PGE(2) across the ages studied. Adrenal cell response to ACTH after prior ACTH and PGE(2) exposure was higher (P < .05) compared with ACTH after ACTH or ACTH alone at 110 days' gestation only and was lower in S-day-om lambs. CONCLUSIONS: Bared an the ACTH results, microphysiometry was a valid method for investigating dispersed adrenal cell physiology. Prostaglandin E-2 stimulated dispersed adrenal cells during the mid-gestation ACTH refractory period, but this effect decreased with increasing age. Prostaglandin E-2 sensitized adrenal cells to ACTH at 110 days' gestation but inhibited ACTH effects at postnatal day 3. Copyright (C) 2001 by the Society for Gynecologic Investigation MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 1071-5576 UR - ISI:000169143800005 L2 - fetal sheep;pregnancy;microphysiometer;H+ production;ACTH;in vitro;ZONA-FASCICULATA-RETICULARIS; CHROMAFFIN CELLS; FETAL SHEEP; CATECHOLAMINE RELEASE; CORTISOL SECRETION; ADRENOCORTICAL FUNCTION; BIOLOGICAL APPLICATIONS; LIVING CELLS; CORTEX; FETUS SO - Journal of the Society for Gynecologic Investigation 2001 ;8(3):149-157 4625 UI - 12766 AU - Zambrano L AU - Scheffer M AU - Martinez-Ramos M AD - Agr Univ Wageningen, Dept Aquat Ecol & Water Qual Management, NL-6700 DD Wageningen, NetherlandsUNAM, Inst Ecol, Morelia 58089, Michoacan, MexicoZambrano, L, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Apdo Post 70-153, Mexico City 04510, DF, Mexico TI - Catastrophic response of lakes to benthivorous fish introduction AB - Introduction of the benthivorous common carp (Cyprinus carpio) has been identified as one of the main causes of loss of biodiversity and water clarity in numerous shallow lakes and ponds worldwide. Recent observations in experimental fish ponds suggest that the effect of carp on the ecosystem is catastrophic in the sense that a substantial impact occurs only when a critical carp density is exceeded. In search for an explanation, we analyzed a simple model of the interaction between benthivorous fish and their invertebrate benthic prey, and of sediment resuspension resulting from fish feeding behavior. Our results suggest that benthic prey populations should be only moderately depressed until predator fish abundance grows to a critical biomass at which benthos collapses due to overexploitation. This drop in prey density is predicted to result in a sharp increase in water turbidity due to an increase in prey search activity of the fish. For less eutrophic and deeper lakes, where benthos productivity and hence benthivorous fish. carrying capacity are lower, water turbidity is predicted to be much less affected. The qualitative patterns are quite robust against assumptions on parameter values and correspond closely to the experimental results and data from lakes suggesting that the model may capture the essence of the mechanism causing a discontinuous effect of benthivorous fish on lake ecosystems MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Netherlands PB - COPENHAGEN: MUNKSGAARD INT PUBL LTD RP - NOT IN FILE U3 - TC 29 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000171173200015 L2 - POTAMOGETON-PECTINATUS L; CYPRINUS-CARPIO L; SUBMERGED MACROPHYTES; LIGHT CONDITIONS; SHALLOW LAKES; BIOMANIPULATION; WATER; NETHERLANDS; STABILITY; REDUCTION SO - Oikos 2001 ;94(2):344-350 4626 UI - 12836 AU - Zamora-Arroyo F AU - Nagler PL AU - Briggs M AU - Radtke D AU - Rodriquez H AU - Garcia J AU - Valdes C AU - Huete A AU - Glenn EP AD - Inst Tecnol & Estudios Super Monterrey, Guaymas 85400, Sonora, MexicoUniv Arizona, Soil Water & Environm Sci, Terr Biophys & Remote Sensing Lab, Tucson, AZ 85721, USASonoran & Rincon Inst, Tucson, AZ 85710, USAUniv Arizona, Environm Res Lab, Tucson, AZ 85706, USAZamora-Arroyo, F, Inst Tecnol & Estudios Super Monterrey, Postal 484, Guaymas 85400, Sonora, Mexico TI - Regeneration of native trees in response to flood releases from the United States into the delta of the Colorado River, Mexico AB - Over the past 20 years, discharge of water from the United States to the delta of the Colorado River in A lexico has regenerated native trees that now account for 23% of vegetation in a 100-km, non-perennial, stretch of river below Morelos Dam at the United States-Mexico border. The discharges are associated with the filling of Lake Powell, the last large reservoir to be constructed on the river, and with ENSO cycles that bring extra winter and spring precipitation to the watershed. The discharges below Morelos Dam produce overbank floods that germinate new cohorts of Populus fremontii and Salix gooddingii trees. Relatively little flood water from the United States is required to support a pulse flood regime that can result in regrowth of native vegetation in the delta. Based on analysis of past flows and existing tree populations, we estimate that a February-April flow of 3 x 10(9) m(3) at 80-120 m(3) s(-1) is sufficient to germinate and establish new cohorts of native trees. However, there was a positive correlation between frequency of flows and total vegetation cover over the years 1992-1999, showing that more frequent flows would further increase vegetation cover. The results support the importance of pulse floods in restoring the ecological integrity of arid-zone rivers. (C) 2001 Academic Press MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 23 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000171097000005 L2 - El Nino/ENSO;riparian;wetlands flood flows;native plants;COTTONWOOD POPULUS-FREMONTII; SALTCEDAR TAMARIX-CHINENSIS; WATER; VEGETATION; ECOSYSTEMS; MANAGEMENT; WETLANDS SO - Journal of Arid Environments 2001 ;49(1):49-64 4627 UI - 14452 AU - Zapata-Torres M AU - Castro-Rodriguez R AU - Martel A AU - Mascarenhas YP AU - Guevara J AU - Melendez-Lira M AU - Pena JL AD - Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560940 Sao Carlos, SP, BrazilCICATA, IPN, Unidad Altamira, Altamira 86900, Tamps, MexicoCINVESTAV, Dept Fis Aplicada, IPN, Unidad Merida, Merida 97310, Yucatan, MexicoUniv La Habana, Fac Fis, La Habana 10400, CubaInst Politecn Nacl, Dept Fis, CINVESTAV, Mexico City 07000, DF, MexicoZapata-Torres, M, Univ Sao Paulo, Inst Fis Sao Carlos, Caixa Postal 369, BR-13560940 Sao Carlos, SP, Brazil TI - Structural characterization of polycrystalline Cd-Te-In films AB - Polycrystalline Cd-Te-In films have been grown on glass substrates by close-spaced vapor transport combined with a free evaporation technique and the stoichiometric, structural and electrical properties were investigated as functions of In2Te3 concentration added in solid solution into the CdTe structure during In incorporation. Indium was introduced by evaporation during film preparation and the incorporation was controlled by the temperature of the In source. The composition of the films was investigated by Auger electron spectroscopy, showing that, when In concentration increases the Cd concentration decreases they have a similar value (approximate to 22 at. %) at about 750 degreesC In source temperature. The dark resistivity decreased monotonically four orders of magnitude with the In2Te3 concentration and reached a minimum point. From the structural characterization employed it was shown that the In atoms are incorporated in two ways: (I) for as low-In concentration, the In atoms substitute the Cd atoms, decreasing the resistivity; and (II) for high-In concentration, the In atoms form with the CdTe a solid solution like (CdTe)(1-x)(In2Te3)(x). The x-ray spectra were calculated for In source temperatures of 550 and 750 degreesC using structure refinement by the Rietveld method and general structure analysis system software. A good agreement between experimental and calculated spectra was found for both temperatures. (C) 2001 American Vacuum Society MH - Brazil MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000166505200037 SO - Journal of Vacuum Science & Technology A-Vacuum Surfaces and Films 2001 ;19(1):246-250 4628 UI - 13069 AU - Zarate-Rodriguez E AU - Ortega-Rivas E AU - Barbosa-Canovas GV AD - Univ Chihuahua, Postgrad Programme Food Sci & Technol, Chihuahua, MexicoWashington State Univ, Pullman, WA 99164, USAOrtega-Rivas, E, Univ Chihuahua, Postgrad Programme Food Sci & Technol, Apdo Postal 1542-C, Chihuahua, Mexico TI - Effect of membrane pore size on quality of ultrafiltered apple juice AB - Fresh apple juice was processed using an ultrafiltration (UF) unit, with polysulphone membranes of 10 000 and 50 000 daltons pore size. Trans-membrane pressures of 103, 120.5, 138 and 155 kPa were studied. Recovery percentages of 0, 25, 50 and 75 were tested for the smaller pore membrane, as well as 0, 10, 20, 30, 40, 50 and 60 for the larger pore membrane. The responses to these factors were evaluated for the quality attributes pH, acid content, soluble solids and colour. In general terms, pH, acid content, and soluble solids did not change but presented less variability for the smaller pore membrane treatment. Relative colour changes were observed for both membranes, with an evident browning trend, which was more detectable for the larger pore membrane treatment MH - Mexico|Chihuahua MH - USA PB - OXFORD: BLACKWELL SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0950-5423 UR - ISI:000170398800009 L2 - apple juice;membrane separation;quality attributes;ultra filtration;ULTRAFILTRATION; CLARIFICATION SO - International Journal of Food Science and Technology 2001 ;36(6):663-667 4629 UI - 13651 AU - Zarr RR AU - Martinez-Fuentes V AU - Filliben JJ AU - Dougherty BP AD - Natl Inst Stand & Technol, Gaithersburg, MD 20899, USANatl Meteorol Ctr, El Marques 76900, Queretaro, MexicoZarr, RR, Natl Inst Stand & Technol, 100 Bur Dr, Gaithersburg, MD 20899 USA TI - Calibration of thin heat flux sensors for building applications using ASTM C 1130 AB - Calibration measurements of thin heat flux sensors for building applications are presented. The findings support the continued development of precision and bias statements for ASTM practice C 1130. Measurements have been conducted using a 1016 mm diameter guarded hot plate apparatus (Test Method C 177) from 10 degreesC to 50 degreesC and for a heat flux range of +/- 13 W/m(2). The option of using a 610 mm heat flow meter apparatus (Test Method C 518) to calibrate the heat flux sensors is also explored. Experimental designs are presented to compare test methods. evaluate which parameters affect the sensor output. and determine the functional relationship between the sensor output and applied heat flux. The study investigates two sizes of sensors fabricated by one manufacturer. Sensor equivalency. grouped by size. is evaluated to determine whether a calibration based on a subset of sensors will suffice or if extensive individual calibrations are needed MH - Mexico|Queretaro MH - USA PB - W CONSHOHOCKEN: AMER SOC TESTING MATERIALS RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0090-3973 UR - ISI:000168773300009 L2 - building technology;calibration;guarded hot plate;heat flow meter;hear flux sensor;repeatability;thermal conductance;thermal insulation SO - Journal of Testing and Evaluation 2001 ;29(3):293-300 4630 UI - 13053 AU - Zaspel CE AU - Mantha JH AU - Rapoport YG AU - Grimalsky VV AD - Univ Montana Western, Dept Environm Sci, Dillon, MT 59725, USAKiev TG Shevchenko State Univ, Dept Space Phys & Astron, UA-252022 Kiev, UkraineNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoZaspel, CE, Univ Montana Western, Dept Environm Sci, Dillon, MT 59725 USA TI - Evolution of solitons in magnetic thin films AB - Localized magnetostatic wave pulses propagating in a magnetic thin film can be modeled by a nonlinear Schroedinger equation, which has stable envelope soliton solutions. When the wave velocity depends also on the wave amplitude it is necessary to add a self-steepening term to the evolution equation. However, when this is done the original envelope will evolve from a symmetric structure into an asymmetric structure as a direct result of the self-steepening term. An approximate time envelope shape is analytically calculated to obtain the time dependence of the asymmetry, and numerical simulations also indicate similar temporal development. Finally, the analytical calculation is compared with previous experimental pulse shapes obtained during propagation in yttrium iron garnet thin films MH - Mexico|Puebla MH - Ukraine MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0163-1829 UR - ISI:000170414000047 L2 - NONLINEAR SCHRODINGER-EQUATION; OPTICAL SOLITARY WAVE; IRON-GARNET FILMS; ENVELOPE SOLITONS; SHOCK SOLUTIONS; VELOCITY SO - Physical Review B 2001 ;6406(6): 4631 UI - 14698 AU - Zavala-Pompa A AU - Folpe AL AU - Jimenez RE AU - Lim SD AU - Cohen C AU - Eble JN AU - Amin MB AD - Inst Mexicano Seguro Social, Hosp Especialidades 25, Dept Pathol, Monterrey, MexicoIndiana Univ, Dept Pathol, Indianapolis, IN 46204, USAAmin, MB, Emory Univ Hosp G167, 1364 Clifton Rd NE, Atlanta, GA 30322 USA TI - Immunohistochemical study of microphthalmia transcription factor and tyrosinase in angiomyolipoma of the kidney, renal cell carcinoma, and renal and retroperitoneal sarcomas - Comparative evaluation with traditional diagnostic markers AB - Angiomyolipoma has a unique immunophenotype with co-expression of muscle-specific actin and melanocytic markers such as HMB-45 and Melan-A. The most recently developed melanocytic markers, microphthalmia transcription factor and tyrosinase, have not been studied in the diagnosis of angiomyolipoma. We tested 29 renal angiomyolipomas (21 classic histology, 4 epithelioid variants, 2 lipomatous variants, and 2 leiomyomatous variants) with an immunohistochemical panel, including microphthalmia transcription factor, tyrosinase, HMB-45, Melan-A, and muscle-specific actin. Results were compared with 15 renal cell carcinomas (9 conventional types, 6 with sarcomatoid change), 2 leiomyosarcomas, 5 liposarcomas, and 1 unclassified high-grade sarcoma. Microphthalmia transcription factor expression was seen in 22 of 29 angiomyolipomas, one renal cell carcinoma, and one well-differentiated liposarcoma (that is, 2 of 23 non-angiomyolipomas; sensitivity 75%, specificity 91%). Tyrosinase expression was seen in 4 of 29 angiomyolipomas and 0 of 23 non-angiomyolipomas (sensitivity 14%, specificity 100%). HMB-45 was positive in 24 of 29 angiomyolipomas and 0 of 23 non-angiomyolipomas (sensitivity 83%, specificity 100%). Melan-A was expressed by 25 of 29 angiomyolipomas and 0 of 23 non-angiomyolipomas (sensitivity 86%, specificity 100%). Muscle-specific actin was expressed by 29 of 29 angiomyolipomas and 2 of 23 non-angiomyolipomas (both leiomyosarcomas; sensitivity 100%, specificity 91% [100% excluding leiomyosarcomas]). Microphthalmia transcription factor showed the most widespread staining in angiomyolipoma (50% of cases staining more than half of the tumor cells) followed by Melan-A (24% of cases staining more than 50%). Only three cases showed positivity for all four melanocytic markers, while in one case each only microphthalmia transcription factor and Melan-A were positive. We conclude that microphthalmia transcription factor, but not tyrosinase immunostaining, has a sensitivity and specificity that rivals those of the established markers, HMB-45 and Melan-A, in the diagnosis of angiomyolipoma. Our data supports the use of a panel in difficult cases that includes antibodies to microphthalmia transcription factor, either Melan-A or HMB-45, and muscle-specific actin to provide the best mix of high sensitivity, high specificity, nuclear and cytoplasmic immunolocalization, and widespread staining of cells within a given tumor MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 34 U4 - Pathology;Surgery U5 - J;Article AV - English IS - 0147-5185 UR - ISI:000165934100007 L2 - angiomyolipoma;kidney neoplasms;retroperitoneal sarcoma;immunohistochemistry;microphthalmia transcription factor;monoclonal antibody;HMB-45;Melan-A;PERIVASCULAR EPITHELIOID CELLS; TUBEROUS SCLEROSIS; SMOOTH-MUSCLE; SUGAR TUMOR; HMB-45 REACTIVITY; LYMPHANGIOLEIOMYOMATOSIS; FAMILY; GENE; IDENTIFICATION; EXPRESSION SO - American Journal of Surgical Pathology 2001 ;25(1):65-70 4632 UI - 13483 AU - Zavala-Rio A AU - Brogliato B AD - Univ Autonoma San Luis Potosi, CIEP FI, San Luis Potosi 78290, MexicoENSIEG, INPG, Lab Automat Grenoble, CNRS,UMR 5528, F-38402 St Martin Dheres, FranceZavala-Rio, A, Univ Autonoma San Luis Potosi, CIEP FI, Av Dr Manuel Nava 8,Zona Univ, San Luis Potosi 78290, Mexico TI - Direct adaptive control design for one-degree-of-freedom complementary-slackness jugglers AB - This note deals with the problem of controlling a simple one-degree-of-freedom (1-dof) juggling robot (a system that belongs to the class of nonsmooth hybrid complementary slackness dynamical systems), when some physical parameters such as the object mass and the restitution coefficient are not exactly known. The proposed adaptive controller is based on so-called dead-beat viable controllers previously studied, in which the sequence of desired "robot" pre-impact velocities is suitably modified. The dynamics of a simple 1-dof hopper is shown to be controllable by the proposed control algorithm. Numerical simulations support the theoretical results. (C) 2001 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000169252300017 L2 - complementary-slackness;juggling;non-smooth mechanics;adaptive control;MECHANICAL SYSTEMS SO - Automatica 2001 ;37(7):1117-1123 4633 UI - 14329 AU - Zaza A AU - Rocchetti M AU - Besana A AU - Gurrola GB AD - Univ Milano Bicocca, I-20126 Milan, ItalyNatl Autonomous Univ Mexico, Cuernavaca, Morelos, Mexico TI - Rate-dependency of IKr and IKs during the ventricular action potential MH - Italy MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000166692202909 SO - Biophysical Journal 2001 ;80(1):640A-640A 4634 UI - 13322 AU - Zenteno A AU - Champac VH AU - Figueras J AD - INAOE, Dept Elect Engn, Puebla 72000, MexicoUniv Politecn Catalunya, Dept Elect Engn, E-08028 Barcelona, SpainZenteno, A, INAOE, Dept Elect Engn, POB 51 & 216, Puebla 72000, Mexico TI - Detectability conditions of full opens in the interconnections AB - Opens in interconnection paths disconnect the driven gate(s) from the driving gate. Detectability conditions to test full opens in interconnections are investigated. It has been found that the detectability of this defect depends strongly on the signals at the driving gate and coupling lines. Three possible situations are analyzed. The first is when there is full controllability of both the signal driving the open and the signal(s) at the coupling line(s). Then, the cases of partial and low controllability of the signals are analyzed. Conditions for reliable detection of this defect by logic and I-DDQ testing have been determined. In addition, it has been found that the detectability of interconnection opens depends on the metal level where the signals are laid-out. Routing design for testability techniques are recommended for some interconnection opens non detectable by either a stuck-at based or I-DDQ testing. Experimental data on intentionally designed defective circuit is presented MH - Mexico|Puebla MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0923-8174 UR - ISI:000169788400003 L2 - defect modeling;opens;logic testing;I-DDQ testing;CMOS; CIRCUITS; DEFECT SO - Journal of Electronic Testing-Theory and Applications 2001 ;17(2):85-95 4635 UI - 12552 AU - Zhang AH AU - Gonzalez SM AU - Cantor EJ AU - Chong SR AD - New England Biolabs Inc, Beverly, MA 01915, USAUniv Chihuahua, Dept Chem Sci, Chihuahua, MexicoChong, SR, New England Biolabs Inc, 32 Tozer Rd, Beverly, MA 01915, USA TI - Construction of a mini-intein fusion system to allow both direct monitoring of soluble protein expression and rapid purification of target proteins AB - Affinity purification of recombinant proteins has been facilitated by fusion to a modified protein splicing element (intein). The fusion protein expression can be further improved by fusion to a mini-intein, i.e. an intein that lacks an endonuclease domain. We synthesized three rnini-inteins using overlapping oligonucleotides to incorporate Escherichia coli optimized codons and allow convenient insertion of an affinity tag between the intein (predicted) N- and C-terminal fragments. After examining the splicing and cleavage activities of the synthesized mini-inteins, we chose the mini-intein most efficient in thiol-induced N-terminal cleavage for constructing a novel intein fusion system. In this system, green fluorescent protein (GFP) was fused to the C-terminus of the affinity-tagged mini-intein whose. N-terminus was fused to a target protein. The design of the system allowed easy monitoring of soluble fusion protein expression by following GFP fluorescence, and rapid purification of the target protein through the intein-mediated cleavage reaction. A total of 17 target proteins were tested in this intein-GFP fusion system. Our data demonstrated that the fluorescence of the induced cells could be used to measure soluble expression of the intein fusion proteins and efficient intein cleavage activity. The final yield of the target proteins exhibited a linear relationship with whole cell fluorescence, The intein-GFP system may provide a simple route for monitoring real time. soluble protein expression, predicting final product yields, and screening the expression of a large number of recombinant proteins for rapid purification in high throughput applications. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Chihuahua MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0378-1119 UR - ISI:000171759100006 L2 - protein splicing;cleavage;green fluorescent protein;GREEN-FLUORESCENT PROTEIN; CEREVISIAE VMA INTEIN; SACCHAROMYCES-CEREVISIAE; SPLICING ELEMENT; ADENOSINE-TRIPHOSPHATASE; RECOMBINANT PROTEINS; ESCHERICHIA-COLI; SPLIT INTEIN; DNAE GENE; CLEAVAGE SO - Gene 2001 ;275(2):241-252 4636 UI - 12009 AU - Zhang B AU - Palcic MM AU - Schriemer DC AU - varez-Manilla G AU - Pierce M AU - Hindsgaul O AD - Univ Alberta, Dept Chem, Edmonton, AB T6G 2G2, CanadaMDS Proteom Inc, Calgary, AB T2L 2K7, CanadaCtr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Georgia, Dept Biochem & Mol Biol, Athens, GA 30602, USAPalcic, MM, Univ Alberta, Dept Chem, Edmonton, AB T6G 2G2, Canada TI - Frontal affinity chromatography coupled to mass spectrometry for screening mixtures of enzyme inhibitors AB - Frontal affinity chromatography coupled online to mass spectrometry (FAC/MS) has previously been used to estimate binding constants for individual protein ligands present in mixtures of compounds. In this study FAC/MS is used to determine enzyme substrate kinetic parameters and binding constants for enzyme inhibitors. Recombinant human N-acetylglucosaminyltransferase V was biotinylated and adsorbed onto immobilized streptavidin in a microcolumn (20 muL). The enzyme was shown to be catalytically competent transferring GlcNAc from the donor UDP-GlcNAc to beta-D-GlcpNAc-(1-->2)-alpha-D-Manp-(1-->6)-beta-D-Glcp-OR acceptor giving beta-D-GLcpNAc-(1-->2)-[beta-D-Glcp-NAc-(1-->6)]-alpha-D-Manp-(1-->6)-be ta-n-Glcp-OR as the reaction product. The kinetic parameters K-m and V-max for the immobilized enzyme could be determined by FAC/MS and were comparable to those measured in solution. Analysis of a mixture of eight trisaccharide analogs in a single run yielded K-d values for each of the eight compounds ranging from 0.3 to 36 muM. These K-d values were 2 to 10 times lower than the inhibition constants, K-I's, determined in solution using a standard radiochemical assay. However, the ranking order of K-d's was the same as the ranking of K-I values. FAC/MS assays can therefore be employed for the rapid estimation of inhibitor K-d values making it a valuable tool for enzyme inhibitor evaluations. (C) 2001 Elsevier Science MH - Canada MH - Mexico|Sonora MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 39 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2697 UR - ISI:000173223300008 L2 - N-ACETYLGLUCOSAMINYLTRANSFERASE-V; TRISACCHARIDE INHIBITORS; RESISTANT; CARCINOMA SO - Analytical Biochemistry 2001 ;299(2):173-182 4637 UI - 13532 AU - Zhang HQ AU - Li SP AU - Yan YH AD - Wuhan Univ Technol, Biomat & Engn Ctr, Wuhan 430070, Peoples R ChinaZhang, HQ, Technol Univ Mixteca, Inst Design, Huajuapan De Leon 69000, Oaxaca, Mexico TI - Dissolution behavior of hydroxyapatite powder in hydrothermal solution AB - The dissolution behavior of hydroxyapatite (HA) in a hydrothermal solution was investigated using a Morey-type autoclave over a range of 150-350 degreesC and a pH value range of 5-9. The results showed that the dissolubility of HA powder was determined as a function of temperature and time under constant pressure, and the temperature coefficient for the solubility of HA powder was positive. The rate of dissolution of HA in the hydrothermal aqueous solution was mainly controlled by a polynuclear mechanism. The dissolution behavior of HA was affected mainly by the hydrothermal temperature and the dissolving activation energy. The effect of temperature was obviously more than that of the pH value of the solution. (C) 2001 Elsevier Science Ltd and Techna S.r.l. All rights reserved MH - Mexico|Oaxaca MH - Peoples R China PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0272-8842 UR - ISI:000169249000011 L2 - hydrothermal;dissolution;HA;CALCIUM HYDROXYAPATITE; KINETICS; SOLUBILITY; CONSTANT SO - Ceramics International 2001 ;27(4):451-454 4638 UI - 13830 AU - Zhang HQ AU - Wang LR AU - Wang YF AU - Yan YH AU - Li SP AD - Wuhan Univ Technol, Ctr Biomed Mat & Engn, Wuhan 430070, Peoples R ChinaZhang, HQ, Technol Univ Mixteca, Inst Design, Oaxaca 69000, Mexico TI - Coating of hydroxyapatite on CaO-SiO2-B2O3-Na2O glass under hydrothermal condition MH - Mexico|Oaxaca MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000168333300016 L2 - IN-VITRO; GEL; COMPOSITES; MORPHOLOGY SO - Journal of Materials Science Letters 2001 ;20(6):535-537 4639 UI - 11872 AU - Zhu YH AU - Yeung CE AU - Lee WB AD - Univ Nacl Autonoma Mexico, IIM, Mexico City 04510, DF, MexicoHong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Hong Kong, Peoples R ChinaZhu, YH, Univ Nacl Autonoma Mexico, IIM, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Phase decomposition of cast alloy ZnAl11Cu3 AB - Microstructure and phase transformation of a cast Zn-Al-based alloy (ZnA111Cu3) are studied during ageing using X-ray diffraction and back-scattered scanning electron microscopy techniques. Decomposition of a zinc-rich eta(s)' phase is observed to take place in the way of continuous precipitation. A four-phase transformation, alpha + epsilon --> T' + eta, occurs during prolonged ageing. It is found that the phases involved in the phase transformation can be distinctly identified by using different atomic contrasts in the back-scattered scanning electron image of precipitates MH - Mexico|Distrito Federal MH - Peoples R China PB - MUNICH: CARL HANSER VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0044-3093 UR - ISI:000173521100010 L2 - phase decomposition;ageing;Zn-Al alloys;ZN-AL ALLOY SO - Zeitschrift fur Metallkunde 2001 ;92(12):1327-1330 4640 UI - 13085 AU - Zhu YH AU - Hernandez AP AU - Lee WB AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoHong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Hong Kong, Peoples R ChinaZhu, YH, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Characteristics of mechanical alloying of Zn-Al-based alloys AB - Three pure elemental powder mixtures of Zn-22%Al-18%Cu, Zn-5%Al-11%Cu, and Zn-27%Al-3%Cu (in wt.%) were mechanically alloyed by steel-ball milling processing. The mechanical alloying characteristics were investigated using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy techniques. It was explored that mechanical alloying started with the formation of phases from pure elemental powders, and this was followed by mechanical milling-induced phase transformation. During mechanical alloying, phases stable at the higher temperatures formed at the near room temperature of milling. Nano-structure Zn-Al-based alloys were produced by mechanical alloying MH - Mexico|Distrito Federal MH - Peoples R China PB - MUNICH: CARL HANSER VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0044-3093 UR - ISI:000170250900009 L2 - mechanical alloying;tensile deformation;stress-induced phase transformation;Zn-Al alloys;DEFORMATION; POWDERS SO - Zeitschrift fur Metallkunde 2001 ;92(6):578-583 4641 UI - 13594 AU - Zhu YH AU - Lee WB AU - Yeung CF AU - Yue TM AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoHong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Hong Kong, Peoples R ChinaZhu, YH, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - EBSD of Zn-rich phases in Zn-Al-based alloys AB - Based on microstructure characterization, electron back-scatter Kikuchi diffraction (EBSD) methodology was used on a multi-phase alloy ZnA14Cu11 (in wt.%). Electron back-scatter Kikuchi diffraction patterns (EBSDPs) were produced from the bulk Zn-Al-based alloy specimen using solely mechanical polishing instead of mechanical and electro-polishing. Both EBSDs of the Zn-rich hexagonal close-packed structure (hcp) phases of epsilon and eta were distinguished for the first time using pre-determined lattice parameters of these phases as the computer database for the multi-phase alloy. These two procedures were practical developments of EBSD technology in the study of crystalline orientation and phase identification. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 1044-5803 UR - ISI:000168935300003 L2 - EBSD;phase identification;crystal orientation;Zn-Al alloys SO - Materials Characterization 2001 ;46(1):19-23 4642 UI - 12391 AU - Zicovich-Wilson CM AU - Dovesi R AU - Saunders VR AD - Univ Turin, Dipartimento CIFM, I-10125 Turin, ItalyINFM, Unita Torino, I-10125 Turin, ItalyCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, EnglandZicovich-Wilson, CM, Univ Autonoma Estado Morelos, Dept Fis, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - A general method to obtain well localized Wannier functions for composite energy bands in linear combination of atomic orbital periodic calculations AB - A method for obtaining spatially localized crystalline orbitals starting from delocalized Bloch functions is proposed. The method, that has been implemented in the LCAO CRYSTAL code, is intrinsic and general for nonconducting systems, and provides a set of well localized Wannier functions that can be used for applications that take advantage of their localized character. Examples are given that illustrate the performances and efficiency of the proposed scheme. (C) 2001 American Institute of Physics MH - United Kingdom MH - Italy MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 52 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000172151000011 L2 - ELECTRON CORRELATION; PERTURBATION-THEORY; HARTREE-FOCK; AB-INITIO; POLARIZATION; APPROXIMATION; ABINITIO; SCHEME; SOLIDS; PHASE SO - Journal of Chemical Physics 2001 ;115(21):9708-9719 4643 UI - 14422 AU - Ziemniak EM AU - Jung C AD - Ruhr Univ Bochum, Fak Math, D-44780 Bochum, GermanyCtr Int Ciencias, Cuernavaca, Morelos, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoZiemniak, EM, Ruhr Univ Bochum, Fak Math, D-44780 Bochum, Germany TI - A model for monolayer deposition with interacting particles AB - We present a very versatile three-dimensional growth model with random initial conditions for the deposition of a monolayer of particles out of a gas beam on a substrate. The flexibility of the model is guaranteed by the inclusion of parameters like the substrate temperature and the chemical binding whose variation changes strongly the lateral diffusion and the morphology of the developing disordered structure. In the modelling of the potential we can use in principle data coming from experiment and quantum mechanical computations. The use of short-range potentials allows to apply the model to covalent systems. We find a variety of patterns which resemble structures found in the experiment and in other theoretical models. The important parameters have simple physical and chemical interpretations, whereas the simulation of static properties may be done with more complicated potentials for specific materials. Our approach allows to look for particular growth conditions and dynamical processes of large structures with moderate use of computational resources. (C) 2001 Published by Elsevier Science Ltd MH - Germany MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000166651400008 L2 - LATTICE STEPS; SURFACE; GROWTH; SILICON; SI; DEPENDENCE; DIFFUSION; STABILITY; GEOMETRY; PT(111) SO - Chaos Solitons & Fractals 2001 ;12(4):747-756 4644 UI - 13403 AU - Zimmermann S AU - Kwan SW AU - Appel JA AU - Cancelo GE AU - Cardoso G AU - Cihangir S AU - Christian DC AU - Downing RW AU - Hoff J AU - Kasper PA AU - Mekkaoui A AU - Vargas A AU - Yarema R AD - Fermi Natl Accelerator Lab, Batavia, IL 60510, USAUniv Autonoma Puebla, Puebla 72570, PUE, MexicoZimmermann, S, Fermi Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA TI - Development of high data readout rate pixel module and detector hybridization at Fermilab AB - At Fermilab, both pixel detector multichip module and sensor hybridization are being developed for the BTeV experiment. The base line design of the module and preliminary results of characterization tests are presented. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000169424600034 SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2001 ;465(1):224-228 4645 UI - 14167 AU - Zindrou S AU - Orozco E AU - Linder E AU - Tellez A AU - Bjorkman A AD - Karolinska Hosp, Dept Med, Infect Dis Unit, Karolinska Inst, S-17176 Stockholm, SwedenIPN, CINVESTAV, Dept Patol Expt, Mexico City 0700, DF, MexicoSwedish Inst Infect Dis Control, Parasitol Lab, S-17182 Solna, SwedenNatl Univ, Fac Med, Dept Microbiol & Parasitol, Leon, NicaraguaZindrou, S, Karolinska Hosp, Dept Med, Infect Dis Unit, Karolinska Inst, S-17176 Stockholm, Sweden TI - Specific detection of Entamoeba histolytica DNA by hemolysin gene targeted PCR AB - Diagnostic differentiation of pathogenic Entamoeba histolytica from non-pathogenic Entamoeba dispar is of great clinical importance. We have developed and evaluated a new polymerase chain reaction (PCR) assay (haemo-PCR) based on the novel E. histolytica hemolysin gene HLY6. The specificity of this assay was confirmed by analyzing different Entamoeba species, faeces samples, human and bacterial DNA, and digestion of amplification products with appropriate restriction enzymes. The sensitivity was confirmed by serial dilutions of E. histolytica HM-1:IMSS DNA in the excess of human DNA. Totally, 45 clinical samples were analyzed by the haemo-PCR assay including amoebic liver abscess (ALA) fluids from 23 patients suspected for amoebiasis. four faeces samples containing E. histolytica and E. dispar, and positive and negative controls. The results were compared with those obtained with PCRs for cystein-rich surface protein (P30) and small subunit ribosomal RNA (ssu rRNA) genes. The haemo-PCR gave a positive result in 18 (89%) ALA fluids compared with 14 (77%) and five (28%,) by PCR for p30, and ssu rRNA, respectively. PCR products were obtained only from specimens containing E. histolytica DNA. The haemo-PCR assay was therefore found to be a valuable diagnostic tool for identification of E. histolytica infections both in faeces and ALA samples. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Nicaragua MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000167476700004 L2 - Entamoeba histolytica;amoebic liver abscess;hemolysin gene targeted PCR;hemolysin;large subunit ribosomal RNA;AMEBIC LIVER-ABSCESS; RIBOSOMAL-RNA GENES; LINKED-IMMUNOSORBENT-ASSAY; POLYMERASE-CHAIN-REACTION; PHOSPHOLIPASE-A; CIRCULAR DNA; DISPAR; DIFFERENTIATION; REPEAT; IDENTIFICATION SO - Acta Tropica 2001 ;78(2):117-125 4646 UI - 11809 AU - Zobin VM AU - Levina VI AD - Univ Colima, Observ Vulcanol, Colima 28045, Col, MexicoRussian Acad Sci, Geophys Serv, Kamchatka Expt & Methodol Dept, Petropavlovsk Kamchatski 683006, RussiaZobin, VM, Univ Colima, Observ Vulcanol, Colima 28045, Col, Mexico TI - The rupture process of the M-w 7.8 Cape Kronotsky, Kamchatka, earthquake of 5 December 1997 and its relationship to foreshocks and aftershocks AB - A M-W 7.8 shallow subduction earthquake occurred on 5 December 1997 near Cape Kronotsky, Kamchatka Peninsula. Broadband P-wave inversions, carried out using two independent methods, allowed us to locate the position of the main asperities, one of high slip of up to 240 cm and a pair of lower slip, that ruptured during the mainshock. The mainshock hypocenter was located within the first asperity but not in the region of maximum slip. Most of the aftershock activity occurred within the low-slip asperities zone; the higher-slip asperity was characterized by low aftershock activity. All large aftershocks as well as the foreshocks (M-W greater than or equal to5.5) occurred outside of the asperities. The mainshock was preceded by a long-term series of single moderate-size events. Based on the spatial distribution of preceding events, foreshocks, aftershocks, and two main asperity zones broken during the mainshock, the following fault history of the M, 7.8 earthquake is proposed. There was an asperity zone below the Kronotsky Cape and its submarine continuation. This asperity was the site of concentration of the events preceding the mainshock, the single earthquakes of magnitude m(b) between 5.5 and 6.1 that occurred during the 35 years before the mainshock of 5 December 1997. The M-W 5.8 earthquake of 9 February 1997, which was accompanied by aftershocks, finished this sequence of single events and marked a change in stress regime within the zone. A foreshock series occurred within the aftershock area of the 9 February earthquake, preparing the nucleus of rupture for the M-W 7.8 event, which began at the periphery of the Kronotsky asperity and then broke it almost completely. The rupture continued its way to the southwestern asperities. However, the southwestern asperities were only partially broken, with the amplitude of slip half that for the first asperity. As a result, during the aftershock stage, the maximum activity occurred around these asperity zones. The region of the first asperity, which was completely broken by the mainshock rupture, had almost no aftershock activity MH - Mexico|Colima MH - Russia PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000173766500017 L2 - KUSHIRO-OKI; INVERSION; ZONE SO - Bulletin of the Seismological Society of America 2001 ;91(6):1619-1628 4647 UI - 13267 AU - Zonana-Nacach A AU - Camargo-Coronel A AU - Yanez P AU - Sanchez L AU - Jimenez-Balderas FJ AU - Fraga A AD - Hosp Especialidades Ctr Med Nacl Siglo XXI, Dept Rheumatol, Inst Mexicano Seguro Social, Mexico City, DF, MexicoZonana-Nacach, A, 143 1-2 D Ave, Coronado, CA 92118, USA TI - Infections in outpatients with systemic lupus erythematosus: a prospective study AB - The objective of this study was to assess the incidence and risk factors of infections in 200 SLE outpatients. All outpatients with active or inactive SLE without infections in the previous month were included. They were assessed every 3 months. Major infections were those requiring hospitalization and parental antibiotic therapy; minor infections required oral or topical therapy. Sociodemographic, disease activity using the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI), therapy and laboratory variables were evaluated. After a follow-up of 22 +/- 7 months, 65 (32%) patients had infections; 35% of those were major. The most common sites for infection were urinary (26%), skin (23%), systemic (12%), and vaginal (9%). At infection onset, 50 of 65 patients (77%) had disease activity, with a mean SLEDAI score of 6.1. The variables significantly associated with infection in the univariate analyses were the presence of disease activity, SLEDAI score, renal activity, prednisone dose, and IV cyclophosphamide. The only variable associated with infection in the multivariate analyses was a SLEDAI score of 4 or higher. Most infections in SLE outpatients were single, minor, non-life threatening, and associated with disease activity independently of sociodemographic and therapeutic factors MH - Mexico|Distrito Federal MH - USA PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 22 U4 - Rheumatology U5 - J;Article AV - English IS - 0961-2033 UR - ISI:000170000600010 L2 - systemic lupus erythematosus;infections;risk factors;outpatients;RISK-FACTORS; CYCLOPHOSPHAMIDE; NEPHRITIS; EXACERBATION; PREDNISONE; NECROSIS; SURVIVAL; ARTICLE; COHORT; DEATH SO - Lupus 2001 ;10(7):505-510 4648 UI - 14733 AU - Zribi M AU - Sira-Ramirez H AU - Ngai A AD - Kuwait Univ, Dept Elect Engn, Safat 13060, KuwaitIPN, CINVESTAV, Secc Mecatron, Dept Ingn Elect, Mexico City 07738, DF, MexicoNanyang Tech Univ, Sch Elect & Elect Engn, Singapore, SingaporeZribi, M, Kuwait Univ, Dept Elect Engn, POB 5969, Safat 13060, Kuwait TI - Static and dynamic sliding mode control schemes for a permanent magnet stepper motor AB - In this paper, the sliding mode control of a permanent magnet (PM) stepper motor is addressed from the perspective of differentially flat systems. Flat systems naturally allow for de-coupled linearization directly leading to static and dynamic discontinuous feedback control alternatives. Implementation results of the proposed sliding mode control schemes on an experimental set-up are given to illustrate the developments MH - Kuwait MH - Mexico|Distrito Federal MH - Singapore PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000165842300001 L2 - VARIABLE STRUCTURE SYSTEMS; NONLINEAR-SYSTEMS; FLATNESS; DESIGN SO - International Journal of Control 2001 ;74(2):103-117 4649 UI - 12120 AU - Zuidema PA AU - Franco M AD - Univ Utrecht, Dept Plant Ecol, NL-3508 TB Utrecht, NetherlandsPROMAB, Riberalta, Beni, BoliviaNatl Autonomous Univ Mexico, Inst Ecol, Coyoacan 04510, DF, MexicoZuidema, PA, Univ Wageningen & Res Ctr, Plant Prod Syst Grp, POB 430, NL-6700 AK Wageningen, Netherlands TI - Integrating vital rate variability into perturbation analysis: an evaluation for matrix population models of six plant species AB - 1 Matrix population models are usually constructed by employing average values of vital rates (survival, growth and reproduction) for each size category. Perturbation analyses of matrix models assess the influence of vital rates or matrix elements on population growth rate. They consider the impact of either an unstandardized (sensitivity analysis) or a mean-standardized (elasticity analysis) change in a model component. Certain vital rates are intrinsically more variable than others. This variation can be taken into account in variance-standardized perturbation analysis, which applies changes to vital rates in proportion to their variability. 2 We applied variance-standardized perturbation analysis to six plant species with different life histories (a forest understorey herb, two tropical forest palms and three tropical forest trees). 1500 random values were drawn from observed frequency distributions of each vital rate in each size category, and population growth rates (lambda) were calculated for each of the simulations. 3 Variability differed widely between vital rates, being particularly high for growth and reproduction. Vital rate variation was negatively correlated with its effect on lambda (measured by either sensitivity or elasticity). The variation in lambda resulting from the sampling procedure differed between species (with higher values in shorter-lived plants) and vital rates (with particularly high values due to variation in growth rates). 4 The relationships between lambda and vital rates were close to linear. Therefore, the product of sensitivity (or elasticity) and degree of variability of a vital rate was a good estimator of the variation in lambda, explaining 95% of the variation in lambda in the six study species. 5 Thus, a reliable estimation of the 95% confidence interval of lambda due to variation in one of the vital rates can be calculated as the product of the 95% confidence interval of the vital rate and its sensitivity. 6 Our results suggest that variance-standardized perturbation analyses are a useful tool to determine the impact of vital rate variation on population growth rate MH - Bolivia MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences;Ecology U5 - J;Article AV - English IS - 0022-0477 UR - ISI:000172926100008 L2 - demographic variation;plant demography;population growth rate;sensitivity analysis;variance-standardized perturbation;FINDING CONFIDENCE-LIMITS; STAGE-STRUCTURED POPULATIONS; TABLE RESPONSE EXPERIMENTS; LIFE-HISTORY PARAMETERS; GROWTH RATE; ELASTICITY ANALYSIS; SENSITIVITY ANALYSIS; PATCH DYNAMICS; CONSERVATION; EVOLUTIONARY SO - Journal of Ecology 2001 ;89(6):995-1005 4650 UI - 13220 AU - Zuniga AE AU - Beatty MF AD - Univ Nebraska, Dept Engn Mech, Lincoln, NE 68588, USAZuniga, AE, Inst Technol & Estudios Super Monterrey, Dept Ingn Mecan, E Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - Forced vibrations of a body supported by viscohyperelastic shear mountings AB - The damped, finite-amplitude forced vibration of a rigid body supported symmetrically by simple shear springs and by a smooth inclined bearing surface is studied. The spring material is characterized as a compressible or incompressible, homogeneous and isotropic viscohyperelastic material for which the shear response function in a simple shear deformation is a quadratic function of the amount of shear. The trivial case of constant shear response is included. The equation for the damped motion of the load is a nonlinear, ordinary differential equation of the forced Duffing type with a constant static shift term due to gravity, and for which an exact solution is unknown. An approximate solution is obtained by the method of harmonic balance. Results for the motion of the load relate the system design parameters to the amplitude-frequency response and to the amplitude-driving force intensity response of the system. Regions of stable motion are identified in terms of the amplitude of the motion, driving-force intensity, driving frequency, and system design parameters. Geometrical characterizations of the motion are related schematically to certain cross-sections through the full three-dimensional solution surfaces for the amplitude and for the phase of the motion. A simple diagram maps the loci of all bifurcation points against the static shear deflection, which serves as the system design parameter for the inclined motion. An infinitesimal stability analysis shows that the bifurcation points of the inclined motion fall on the stability boundaries of the numerical solution of a three-parameter Hill equation. The solution provides information that illustrates how the system design parameters affect the motion of the load and how these may be chosen to control the amplitude of the oscillations and the stability of the system. The results are valid for all compressible or incompressible, homogeneous and isotropic, viscohyperelastic materials in the aforementioned class MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0022-0833 UR - ISI:000170061100002 L2 - nonlinear elasticity;Duffing equation;harmonic balance;stability;Mathieu-Hill equations;QUADRATIC RESPONSE; HARMONIC-BALANCE; STABILITY; MOTION SO - Journal of Engineering Mathematics 2001 ;40(4):333-353 4651 UI - 11810 AU - Zuniga FR AU - Wyss M AD - UNAM, Unidad Ciencias Tierra, Inst Geofis, Juriquilla 76230, Queretaro, MexicoUniv Alaska, Inst Geophys, Fairbanks, AK 99775, USAZuniga, FR, UNAM, Unidad Ciencias Tierra, Inst Geofis, Juriquilla 76230, Queretaro, Mexico TI - Most- and least-likely locations of large to great earthquakes along the Pacific coast of Mexico estimated from local recurrence times based on b-values AB - We mapped T-L and P-L (local recurrence time and local probability density, respectively) for M-max 7.2 earthquakes along the plate margin of the Pacific coast of Mexico in order to test two hypotheses. The first is that the minima in T-L (or maxima in P-L), extracted probabilistically from the frequency-magnitude distribution map asperities. The second hypothesis is that recurrence times for characteristic events are estimated more correctly by local recurrence times than by the overall recurrence times of the zone. Comparing these results to the observed recurrence times for events of M greater than or equal to 7.0, we find good agreement. The coast of Guerrero between longitude west 100.5degrees and 101.5degrees and the segment off the coast of southern Chiapas show the shortest T-L estimated as about 20 yr; the location at longitude 98.5degrees (near the boundary of Guerrero with Oaxaca, the Ometepec segment) follows with estimates of about 30 yr as the next shortest T-L; along the coast of Guerrero, between 99degrees and 100.5degrees longitude, T-L is estimated as about 40 yr; and finally, in the segments off the Oaxacan coast near 95.7degrees and 97.7degrees longitude, T-L ranges from 40 to 60 yr. These volumes we define as asperities. Long local recurrence times are observed for the areas offshore from the isthmus of Tehuantepec, on the Pacific plate off the coast of Guerrero, on land along the coast of most of Oaxaca, and along the northernmost 40 kin of the Guerrero coast. If our ideas are correct, then major moment release should emanate from the volumes we defined as asperities, and relatively minor moment release should emanate from the volumes identified by the relatively long local recurrence times MH - Mexico|Queretaro MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000173766500024 L2 - FREQUENCY-MAGNITUDE DISTRIBUTION; SUBDUCTION; CATALOGS; ALASKA; SEISMICITY; CALIFORNIA; ASPERITIES; VOLCANO; MOMENT; DEPTH SO - Bulletin of the Seismological Society of America 2001 ;91(6):1717-1728 4652 UI - 12418 AU - Zurita A AU - Rozas M AU - Beckman JE AU - Ryder S AD - Inst Astrofis Canarias, Tenerife, SpainUNAM, Observ San Pedro Martir, Ensenada, Baja California, MexicoCSIC, Madrid, SpainAnglo Australian Observ, Epping, NSW 2121, AustraliaZurita, A, Inst Astrofis Canarias, Tenerife, Spain TI - The ionized intergalactic gas: Baryonic dark matter AB - We use H alpha measurements of complete sets of HII regions in disc galaxies to compute the fraction of ionizing photons which escape from them using the hypothesis of density bounding. The escaping flux is more than enough to ionize the observed diffuse ionized gas (DIG) and the balance implies that an important fraction of the flux escapes into the intergalactic medium (IGM) MH - Australia MH - Mexico|Baja California MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000172167900132 L2 - galaxies : spiral;ISM;HII regions;IGM SO - Astrophysics and Space Science 2001 ;277():499-499 4653 UI - 9379 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, LPNHE, Paris, FranceCNRS, IN2P3, Paris, FranceCEA, Serv Phys Particles, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USABrookhaven Natl Lab, Upton, NY 11973, USALangstan Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Zurich, Zurich, SwitzerlandAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Search for minimal supergravity in single-electron events with jets and large missing transverse energy in p(p)over-bar collisions at root s=1.8 TeV AB - We describe a search for evidence of minimal supergravity (MSUGRA) in 92.7 pb(-1) of data collected with the D empty set detector at the Fermilab Tevatron p (p) over bar collider at roots=1.8 TeV. Events with a single electron, four or more jets, and large missing transverse energy were used in this search. The major backgrounds are from W+jets, misidentified multijet, t (t) over bar, and WW production. We observe no excess above the expected number of background events in our data. A new limit in terms of MSUGRA model parameters is obtained MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - Switzerland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000180317600005 L2 - QUARK PAIR PRODUCTION; PRODUCTION CROSS-SECTION; LARGE HADRON COLLIDER; STANDARD MODEL; RENORMALIZATION-GROUP; SUPERSYMMETRY REACH; UNIFICATION; TEVATRON; COLLABORATION; SIGNALS SO - Physical Review D 2002 ;66(11): 4654 UI - 9527 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for the production of single sleptons through R-parity violation in p(p)over-bar collisions at root s=1.8 TeV AB - We report the first search for supersymmetric particles via s-channel production and decay of smuons or muon sneutrinos at hadronic colliders. The data for the two-muon and two-jets final states were collected by the D0 experiment and correspond to an integrated luminosity of 94+/-5 pb(-1). Assuming that R parity is violated via the single coupling lambda(211)('), the number of candidate events is in agreement with expectation from the standard model. Exclusion contours are given in the (m(0),m(1/2)) and (m((χ) over bar),m((ν) over bar)) planes for lambda(211)(')=0.09, 0.08, and 0.07 MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000179878200006 L2 - TEVATRON RUN-II; HADRON COLLIDERS; SUPERSYMMETRY; PYTHIA-5.7; STATES; WEAK SO - Physical Review Letters 2002 ;89(26): 4655 UI - 10094 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particule, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for R-parity violating supersymmetry in two-muon and four-jet topologies AB - We present results of a search for R-parity-violating decay of the neutralino (χ) over tilde (0)(1), taken as the lightest supersymmetric particle, to a muon and two jets. The decay proceeds through a lepton-number violating coupling lambda(2jk)' (j = 1,2; k = 1,2,3), with R-parity conservation in all other production and decay processes. In the absence of candidate events from 77.5 +/- 3.9 pb(-1) of data collected by the D0 experiment at the Fermilab Tevatron in p (p) over bar collisions at roots = 1.8 TeV, and with an expected background of 0.18 +/- 0.03 +/- 0.02 events, we set limits on squark and gluino masses within the framework of the minimal low-energy supergravity-supersymmetry model MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000178483500010 L2 - SIGN DILEPTON SIGNATURE; P(P)OVER-BAR COLLISIONS; SUPERGRAVITY; CHANNEL; PHYSICS; STATES; WEAK SO - Physical Review Letters 2002 ;89(17): 4656 UI - 10296 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particles, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM Inst NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Zurich, Zurich, SwitzerlandAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Direct measurement of the W boson decay width AB - Based on 85 pb-1 data of p (p) over bar collisions at roots=1.8 TeV collected using the D empty set detector at Fermilab during the 1994-1995 run of the Tevatron, we present a direct measurement of the total decay width of the W boson Gamma(W). The width is determined from the transverse mass spectrum in the W-->e+nu(e) decay channel and found to be Gamma(W)=2.23(-0.14)(+0.15)(stat)+/-0.10(syst) GeV, consistent with the expectation from the standard model MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - Switzerland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177873600012 L2 - TRANSVERSE-MOMENTUM; E(+)E(-) COLLISIONS; PARTICLE PHYSICS; GAUGE THEORIES; CROSS-SECTION; LEPTON PAIRS; D0 DETECTOR; MASS; COLLIDER; COLLABORATION SO - Physical Review D 2002 ;66(3): 4657 UI - 10469 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCEA, Serv Phys Particles, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Zurich, Zurich, SwitzerlandInst Nucl Phys, Krakow, PolandAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Improved W boson mass measurement with the DO detector AB - We have measured the W boson mass using the DO detector and a data sample of 82 pb(-1) from the Fermilab Tevatron collider. This measurement uses W-->enu decays, where the electron is close to a boundary of a central electromagnetic calorimeter module. Such "edge" electrons have not been used in any previous DO analysis, and represent a 14% increase in the W boson sample size. For these electrons, new response and resolution parameters are determined, and revised backgrounds and underlying event energy flow measurements are made. When the current measurement is combined with previous DO W boson mass measurements, we obtain M-W=80.483+/-0.084 GeV. The 8% improvement from the previous DO measurement is primarily due to the improved determination of the response parameters for non-edge electrons using the sample of Z bosons with non-edge and edge electrons MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - Switzerland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177338600005 L2 - GLOBAL QCD ANALYSIS; TOP-QUARK MASS; PARTON DISTRIBUTIONS; E(+)E(-) COLLISIONS; COLLIDER DETECTOR; D0 DETECTOR; FERMILAB; WIDTH SO - Physical Review D 2002 ;66(1): 4658 UI - 11199 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Amoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Hard single diffraction in (p)over-barp collisions at root s=630 and 1800 GeV AB - Using the D empty set detector, we have studied events produced in (p) over barp collisions that contain large forward regions with very little energy deposition ("rapidity gaps") and concurrent jet production at center-of-mass energies of roots = 630 and 1800 GeV. The fraction of events with forward or central jets associated with rapidity gaps is compared to predictions for hard diffraction. We also extract the momentum loss for scattered protons in such processes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000175170400005 L2 - FERMILAB TEVATRON; DIJET PRODUCTION; POMERON; HERA SO - Physics Letters B 2002 ;531(1-2):52-60 4659 UI - 11237 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for leptoquark pairs decaying into nu nu plus jets in p(p)over-bar collisions at TeV at root s=1.8 TeV AB - We present the results of a search for leptoquark (LQ) pairs in (85.2 +/- 3.7) pb(-1) of p (p) over bar collider data collected by the D0 experiment at the Fermilab Tevatron. We observe no evidence for leptoquark production and set a limit on sigma(p (p) over bar -->LQ (LQ) over bar --> nunu + jets) as a function of the mass of the leptoquark (m(LQ)) . Assuming the decay LQ --> nuq, we exclude scalar leptoquarks for m(LQ) < 98 GeV/c(2), and vector leptoquarks for m(LQ) < 200 GeV/c(2) and coupling which produces the minimum cross section, at a 95% confidence level MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000175324900007 L2 - TOP-QUARK PRODUCTION; HADRON COLLIDERS; 2ND-GENERATION; GENERATION; PHYSICS; HERA SO - Physical Review Letters 2002 ;88(19): 4660 UI - 11378 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Ke Z AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN203, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceCEA, Serv Phys Particles, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Search for the scalar top quark in p(p)over-bar collisions at root s= 1.8 TeV AB - We have performed a search for scalar top quark (stop) pair production in the inclusive electron-muon-missing transverse energy final state, using a sample of p (p) over bar events corresponding to 108.3 pb (-1) of data collected with the D0 detector at Fermilab. The search is done in the framework of the minimal supersymmetric standard model assuming that the sneutrino is the lightest supersymmetric particle. For the dominant decays of the lightest stop, (t) over tilde-->b (χ) over tilde (+)(1) and (t) over tilde-->bl (ν) over tilde , no evidence for signal is found. We derive cross-section limits as a function of stop ((t) over tilde), chargino ((χ) over tilde (+)(1)), and sneutrino ((ν) over tilde ) masses MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000175054700013 L2 - ROOT-S=189 GEV; E(+)E(-) COLLISIONS; PARTICLE PHYSICS; PAIR PRODUCTION; BOTTOM QUARKS; SUPERSYMMETRY; CHARGINOS; SQUARK; LEP; NEUTRALINOS SO - Physical Review Letters 2002 ;88(17): 4661 UI - 11435 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alves GA AU - Amos N AU - Anderson EW AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Di Loreto G AU - Doulas S AU - Draper P AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Frame KC AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Martin RD AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McDonald J AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Nagy E AU - Nang F AU - Narain M AD - Dubna Joint Nucl Res Inst, Dubna 141980, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Dubna Joint Nucl Res Inst, Dubna 141980, Russia TI - Direct search for charged Higgs bosons in decays of top quarks AB - We present a search for charged Higgs bosons in decays of pair-produced top quarks in p (p) over bar collisions at roots = 1.8 TeV recorded by the D0 detector at the Fermilab Tevatron collider. With no evidence for signal, we exclude most regions of the (MH+/-, tanbeta) parameter space where the decay t --> H (+)b has a branching fraction >0.36 and B(H+/- --> taunu(tau) ) is large MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000174773400008 L2 - PRODUCTION CROSS-SECTION; ROOT-S=1.8 TEV; MASS; COLLABORATION; COLLISIONS; DETECTOR; PAIRS; TAU SO - Physical Review Letters 2002 ;88(15): 4662 UI - 11549 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HK AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Heuring T AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - May B AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceIN2P3, CNRS, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Phys Nucl, Krakow, PolandInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Subjet multiplicity of gluon and quark jets reconstructed with the k(perpendicular to) algorithm in p(p)over-bar collisions AB - The D empty set Collaboration has studied for the first time the properties of hadron-collider jets reconstructed with a successive-combination algorithm based on relative transverse momenta (k(perpendicular to)) of energy clusters. Using the standard value D = 1.0 of the jet-separation parameter in the k(perpendicular to) algorithm, we find that the p(T) of such jets is higher than the E-T of matched jets reconstructed with cones of radius R = 0.7, by about 5 (8) GeV at p(T) approximate to90 (240) GeV. To examine internal jet structure, the k(perpendicular to) algorithm is applied within D = 0.5 jets to resolve any subjets. The multiplicity of subjets in jet samples at roots = 1800 GeV and 630 GeV is extracted separately for gluons (M (g) ) and quarks (M q), and the ratio of average subjet multiplicities in gluon and quark jets is measured as ([M g] - 1)/([M q] - 1) = 1.84+/-0.15 (stat)(-0.18)(+0.22) (syst). This ratio is in agreement with the expectations from the HERWIG Monte Carlo event generator and a resummation calculation, and with observations in e(+) e(-) annihilations, and is close to the naive prediction for the ratio of color charges of C-A/C-F = 9/4 = 2.25 MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000174548000011 L2 - DEEP-INELASTIC-SCATTERING; PRODUCTION CROSS-SECTION; HADRON-COLLISIONS; FRAGMENTATION PROPERTIES; PARTON DISTRIBUTIONS; PERTURBATION-THEORY; GLOBAL ANALYSIS; COLLIDER; 3-JET; EVENTS SO - Physical Review D 2002 ;65(5): 4663 UI - 11928 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin BB AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer A AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - Davis K AU - De K AU - de Jong SJ AU - Del Signore K AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Feher S AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Gomez G AU - Goncharov PI AU - Solis JLG AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Graham G AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hanlet P AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Li X AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz KM AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaLafex, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, Inst Sci Nucl, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Mumbai, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - The inclusive jet cross section in pp collisions at root s=1.8 TeV using the k perpendicular to algorithm AB - The central inclusive jet cross section has been measured using a successive-combination algorithm for reconstruction of jets. The measurement uses 87.3 pb(-1) of data collected with the DO detector at the Fermilab Tevatron p (p) over bar Collider during 1994-1995. The cross section, reported as a function of transverse momentum (p(T) > 60 GeV) in the central region of pseudorapidity (\eta\ < 0.5), exhibits reasonable agreement with next-to-leading order QCD predictions, except at low p(T) where the agreement is marginal. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000173393000002 L2 - DEEP-INELASTIC-SCATTERING; HADRON-COLLISIONS; PARTON DISTRIBUTIONS; GLOBAL ANALYSIS; COLLIDERS SO - Physics Letters B 2002 ;525(3-4):211-218 4664 UI - 10362 AU - Abe F AU - Nagafuji S AU - Yamauchi T AU - Okabe H AU - Maki J AU - Higo H AU - Akahane H AU - Aguilar A AU - Jimenez-Estrada M AU - Reyes-Chilpa R AD - Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, Fukuoka 8140180, JapanFukuoka Univ, Sch Med, Jonan Ku, Fukuoka 8140180, JapanKitasato Univ, Sch Med, Sagamihara, Kanagawa 2288555, JapanKyushu Univ, Grad Sch Med Sci, Higashi Ku, Fukuoka 8128582, JapanMexican Inst Social Secur, Herbarium, Natl Med Ctr, Mexico City 06725, DF, MexicoNatl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, MexicoAbe, F, Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, 8-19-1 Nanakuma, Fukuoka 8140180, Japan TI - Trypanocidal constituents in plants 1. Evaluation of some Mexican plants for their trypanocidal activity and active constituents in Guaco, roots of Aristolochia taliscana AB - Crude extracts of Mexican medicinal plants were screened for trypanocidal activity against Trypanosoma cruzi, which is the etiological agent for Chagas' disease, one of the most serious protozoan diseases in Latin America. There were 43 kinds of methanolic and other organic extracts from 39 plants which were examined by the preliminary screening test to see immobilization of epimastigotes of T cruzi in vitro. Eighteen of them showed activity at the concentration of 2 mg/ml after incubation for 2 h, while 13 showed activity at the concentration of 1 mg/ml after incubation for 48 h. Among them, the MeOH extract of roots of Aristolochia taliscana (Aristolochiaceae), locally known as "Guaco" immobilized all the epimastigotes even at lower concentration of 0.5 mg/ml (48h). In order to identify principal compounds for this activity, the MeOH extract of Guaco was subjected to bioassay-guided fractionation. From the active fractions, four neolignans, eupomatenoid-7 (1), licarin A (2), eupomatenoid-1 (5) and licarin B (6), and two lignans, austrobailignan-7 (3) and fragransin E-1 (4) were isolated. Compounds 1-4 immobilized all the epimastigotes at the minimum concentration of 25-75 mug/ml after incubation for 48 h, while compounds 5 and 6 were inactive. Corresponding concentration of gossypol, berberine chloride and harmine was 280 mug/ml, 300 mug/ml and >500 mug/ml, respectively MH - Japan MH - Mexico|Distrito Federal PB - TOKYO: PHARMACEUTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 17 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0918-6158 UR - ISI:000177748000016 L2 - trypanocidal activity;Trypanosoma cruzi;Aristolochia taliscana;Chagas' disease;neolignan;lignan;TRYPANOSOMA-CRUZI; EUPOMATIA-LAURINA; LIGNANS; GROWTH; LEAVES; BARK SO - Biological & Pharmaceutical Bulletin 2002 ;25(9):1188-1191 4665 UI - 10785 AU - Acevedo P AU - Das-Gupta D AD - Univ Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 01000, DF, MexicoUniv Coll N Wales, SEECS, Bangor LL57 1UT, Gwynedd, WalesAcevedo, P, Univ Nacl Autonoma Mexico, IIMAS, DISCA, Apdo Postal 20-726,Admon 20, Mexico City 01000, DF, Mexico TI - The measurement of the spatial average temporal average intensity I-sata and ultrasonic power W in composite ultrasonic transducers for medical application AB - Two possible methods to determine the spatial average temporal average intensity I-sata and ultrasonic power W in composite ultrasonic transducers for medical application are described. Results showed that integrals using one method will yield accurate results but a vast amount of computational effort is required. On the other hand, using an alternative method these integrals may readily be solved at the expense of the accuracy of the results deduced. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Acoustics;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0041-624X UR - ISI:000176648000143 L2 - intensity measurements;ultrasonic power;medical transducers SO - Ultrasonics 2002 ;40(1-8):819-821 4666 UI - 10079 AU - Acharya A AU - az-Ortega JL AU - Tambini G AU - Quadros C AU - Arita I AD - Univ Sussex, Inst Dev Studies, Brighton BN1 9RH, E Sussex, EnglandNatl Inst Publ Hlth, Mexico City, DF, MexicoPAHO, Div Vaccines & Immunizat, Washington, DC, USAACIH, Kumamoto, JapanAcharya, A, Univ Sussex, Inst Dev Studies, Falmer, Brighton BN1 9RH, E Sussex, England TI - Cost-effectiveness of measles elimination in Latin America and the Caribbean: a prospective analysis AB - Background: In 1994, the Americas set a goal of interrupting indigenous measles transmission from the Western Hemisphere by 2000. To accomplish this goal, the Pan American Health Organization (PAHO) developed an enhanced measles vaccination strategy. Methods: Cost data was collected at PAHO for Latin American and Caribbean (LAC) countries covering 96% of the region's population on components of the routine programs, and the 'follow-up' activities from member countries. In order to interpret our findings we have compared the present scenario regarding measles with one that would have ensued if past trends continued. Results: For the entire LAC population, estimated cost of elimination program will be US$ 571 million in present value terms. Interpretation: The vaccination strategy toward achieving elimination of measles costs US$ 244 million, incremental from the cost of vaccination before the elimination program. Within 2000-2020, the current program will have prevented the occurrence of 3.2 million cases of measles and 16,000 deaths. Thus, vaccination strategy prevents a single case of measles at the cost of US$ 71.75 and prevents a death due to measles at the cost of US$ 15,000. The case fatality rate depends on a well functioning treatment program for measles cases. The vaccination strategy saves a total of US$ 208 million in treatments costs due to reduced incidence of measles. 0 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Japan MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Medicine, Research & Experimental;Veterinary Sciences U5 - J;Article AV - English IS - 0264-410X UR - ISI:000178486700013 L2 - measles;eradication;cost-effectiveness;immunization;Latin America;VACCINES SO - Vaccine 2002 ;20(27-28):3332-3341 4667 UI - 9901 AU - Acuna ME AU - Villanueva C AU - Cardenas B AU - Christen P AU - Revah S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Mexico City 09340, DF, MexicoInst Mexicano Petr, Eje Cent Lazaro Cardenas, Mexico City 07730, DF, MexicoUniv Pedro Ruiz Gallo, Lambayeque, PeruIRD, Mexico City 11510, DF, MexicoRevah, S, Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Ave Purisima & Michoacan, Mexico City 09340, DF, Mexico TI - The effect of nutrient concentration on biofilm formation on peat and gas phase toluene biodegradation under biofiltration conditions AB - Sterile peat used as biofilter medium, was amended with four different concentrations of a nutrient solution, inoculated with a toluene-utilizing consortium. Samples were incubated over 120 days in closed environments microcosms with water vapor and toluene saturation to emulate the conditions prevailing in biofilters. An improvement on toluene consumption rates, associated with microbial growth was observed with high nutrient concentrations. However, at longer periods (over 60 days) toluene consumption decreased to cell maintenance levels. The CO2 Production rate was associated with toluene degradation. scanning electron microscopy (SEM) micrographs revealed a non-homogenous biofilm distribution. Higher microbial cell density, salt crystals and extracellular polymer formation was observed with higher nutrient concentrations while scarce colonization and cell morphology changes were observed with lower nutrient concentrations. The results of this work corroborate the importance of nutrient concentration on biofilter performance during start-up and long-term operation. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Peru PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0032-9592 UR - ISI:000179054400002 L2 - biofilters;toluene;nutrients;endogenous respiration;biofilms;SEM;ACINETOBACTER-CALCOACETICUS; PERFORMANCE; KINETICS; REMOVAL; REACTOR; GROWTH; AIR; BED SO - Process Biochemistry 2002 ;38(1):7-13 4668 UI - 9502 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Carli T AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Malinovski I AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmidt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schorner T AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Antwerp, Antwerp, BelgiumVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Chilton, Didcot, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, DSM, CE Saclay, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, IN2P3, LPNHE, CNRS, Palaiseau, FranceUniv Paris 06, IN2P3, CNRS, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, Athens 15773, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City, DF, MexicoUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Search for QCD instanton-induced processes in deep-inelastic scattering at HERA AB - Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in a kinematic region defined by the Bjorken-scaling variables x > 10(-3), 0.1 < y < 0.6 and photon virtualities 10 less than or similar to Q(2) < 100 GeV2. Several observables characterising hadronic final state properties of QCD instanton-induced events are exploited to identify a potentially instanton-enriched domain. While an excess of events with instanton-like topology is observed it cannot be claimed significant given the uncertainty of the standard DIS background simulation. Upper limits on the cross-section for instanton-induced processes of between 60 pb and 1000 pb are set dependent on the kinematic domain considered. The data do not exclude the cross-section predicted by instanton perturbation theory for small instanton sizes. At large instanton sizes a naive extrapolation of instanton perturbation theory yields a cross-section in the range of sensitivity of this study. Such a cross-section is not observed, in agreement with non-perturbative lattice simulations of the QCD vacuum MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000179928900001 L2 - POSITRON-PROTON COLLISIONS; LIQUID ARGON CALORIMETER; MONTE-CARLO GENERATOR; PERTURBATION-THEORY; CROSS-SECTIONS; JET FRAGMENTATION; EVENT GENERATOR; EP SCATTERING; MODEL; CASCADES SO - European Physical Journal C 2002 ;25(4):495-509 4669 UI - 9780 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Ermann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henshel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Koya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newmann PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Tschorner T AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB, VUB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Antwerp, UIA, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-44221 Dortmund, GermanyDubna Joint Nucl Res Inst, Dubna 141980, RussiaCEA, CE Saclay, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, D-24098 Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, S-22100 Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, Orsay, FranceEcole Polytech, CNRS, LPNHE, IN2P3, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 08, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, CR-11636 Prague 1, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, CH-8006 Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany TI - Search for excited electrons at HERA AB - A search for excited electron (e*) production is described in which the electroweak decays e* --> egamma, e* --> eZ and e* ---> nuW are considered. The data used correspond to an integrated luminosity of 120 pb(-1) taken in e(+/-)p collisions from 1994 to 2000 with the H1 detector at HERA at centre-of-mass energies of 300 and 318 GeV. No evidence for a signal is found. Mass dependent exclusion limits are derived for the ratio of the couplings to the compositeness scale, f/A. These limits extend the excluded region to higher masses than has been possible in previous direct searches for excited electrons. (C) 2002 Published by Elsevier Science B.V MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000179259800007 L2 - LIQUID ARGON CALORIMETER; DEEP-INELASTIC-SCATTERING; LEPTON PRODUCTION; FERMIONS; CALIBRATION; COMPOSITE; COLLIDERS; GENERATOR; PHYSICS SO - Physics Letters B 2002 ;548(1-2):35-44 4670 UI - 10037 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann A AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Golling T AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Antwerp, UIA, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, FranceEcole Polytech, CNRS, LPNHE, IN2P3, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, CNRS, LPNHE, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Search for odderon-induced contributions to exclusive pi(0) photoproduction at HERA AB - A search for contributions to the reaction ep --> epi(0)N* from photon-odderon fusion in the photoproduction regime at HERA is reported, at an average photon-proton centre-of-mass energy = 215 GeV. The measurement proceeds via detection of the pi(0) decay photons, a leading neutron from the N* decay, and the scattered electron. No pi(0) signal is observed and an upper limit on the cross section for the photon-odderon fusion process of sigma(gammap --> pi(0)N*) < 49 nb at the 95% confidence level is derived, integrated over the experimentally accessible range of the squared four-momentum transfer at the nucleon vertex 0.02 < \t\ < 0.3 GeV2. This excludes a recent prediction from a calculation based on a non-perturbative QCD model of a photon-odderon fusion cross section above 200 nb. (C) 2002 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000178437300005 L2 - TOTAL CROSS-SECTIONS; LEAD/SCINTILLATING-FIBER CALORIMETER; HIGH-ENERGIES; H1 DETECTOR; SCATTERING; EXCHANGE; QCD SO - Physics Letters B 2002 ;544(1-2):35-43 4671 UI - 10180 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bhome J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RC AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovannsyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumUIA, Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DAPNIA, DSM, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, ItalyIst Nazl Fis Nucl Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of dijet cross sections in photoproduction at HERA AB - Dijet cross sections as functions of several jet observables are measured in photoproduction using the HI detector at HERA. The data sample comprises e(+)p data with an integrated luminosity of 319 pb(-1). Jets are selected using the inclusive k(perpendicular to) algorithm with a minimum transverse energy of 25 GeV for the leading jet. The phase space covers longitudinal proton momentum fraction x(p) and photon longitudinal momentum fraction x(gamma) in the ranges 0.05 < x(p) < 0.6 and 0.1 < x(gamma) < 1. The predict ions of next-to-leading order perturbative QCD, including recent photon and proton parton densities, are found to be compatible with the data in a wide kinematical range MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000178283800002 L2 - POSITRON-PROTON COLLISIONS; LIQUID ARGON CALORIMETER; LEADING ORDER QCD; PARTON DISTRIBUTIONS; HADRON-COLLISIONS; PHOTON STRUCTURE; HARD SCATTERING; GENERATOR; JETS SO - European Physical Journal C 2002 ;25(1):13-23 4672 UI - 10181 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleisher M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Prising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Lokuionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Malinovski I AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nozicka M AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumUIA, Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DAPNIA, DSM, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Inelastic photoproduction of J/psi mesons at HERA AB - An analysis of inelastic photoproduction of J/psi mesons is presented using data collected at the ep collider HERA corresponding to an integrated luminosity of above 80 pb(-1), Differential and double I < P-t/psi(2) < differential cross sections are measured in a wide kinematic region: 60 < W-gammap < 260 GeV, 1 p(t,psi)(2) < 60 GeV2 and 0.05 < z < 0.9. where z is the fraction of the energy of the exchanged photon transferred to the J/psi meson in the rest frame of the target proton. Cross sections at z less than or similar to 0.3 are presented for the first time. Theoretical calculations within the Colour Singlet Model at NLO for direct photon processes are shown to give a good description of the data in the medium z region (0.3 < z < 0.9) up to the highest p(t,psi)(2) values. A calculation using a k(t) factorisation approach in LO in the Colour Singlet Model is also able to describe these data. The data in the full z range are also compared to LO calculations within a non-relativistic QCD framework including colour octet and colour singlet contributions for direct and resolved photons. It seems possible to reconcile data and theory with modest contributions from colour octet processes. The polarisation of the J/psi meson is measured as a function of z and p(t,psi) and is reasonably described by the theoretical predictions MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000178283800003 L2 - LEAD/SCINTILLATING-FIBER CALORIMETER; MONTE-CARLO GENERATOR; PARTON DISTRIBUTIONS; HEAVY QUARKONIUM; P(P)OVER-BAR COLLISIONS; MOMENTUM DISTRIBUTIONS; ROOT-S=1.8 TEV; QCD ANALYSIS; H1 DETECTOR; J-PSI SO - European Physical Journal C 2002 ;25(1):25-39 4673 UI - 10182 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Boehme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleisclier M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort I AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Malinovski I AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham, W Midlands, EnglandVUB, ULB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DAPNIA, DSM, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceLab Theoret & Expt Phys, Moscow, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, ItalyINFN Roma 3, I-00173 Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenznetrum, Wuppertal, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Inelastic leptoproduction of J/psi mesons at HERA AB - The leptoproduction of J/psi mesons is studied in inelastic reactions for four momentorri transfers 2 < Q(2) < 100GeV(2). The data were taken with the H1 detector at the electron proton collider HERA and correspond to an integrated luminosity of 77 pb(-1). Single differential and double differential cross sections are measured with increased precision compared with previous analyses. New leading order calculations within the non-relativistic QCD factorisation approach including colour octet and colour singlet contributions are compared with the data and are found to give a reasonable description of most distributions. An exception is the shape of the distribution in the J/psi fractional energy. z, which deviates significantly from that of the data. Comparisons with photoproduction are made and the polarisation of the produced J/psi meson is analysed MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 22 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000178283800004 L2 - LEAD/SCINTILLATING-FIBER CALORIMETER; P(P)OVER-BAR COLLISIONS; MOMENTUM DISTRIBUTIONS; PARTON DISTRIBUTIONS; GLUON DISTRIBUTION; HEAVY QUARKONIUM; ROOT-S=1.8 TEV; QCD ANALYSIS; H1 DETECTOR; J-PSI SO - European Physical Journal C 2002 ;25(1):41-53 4674 UI - 10210 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Carli T AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Malinovski I AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikochi S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau D AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger K AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schoeffel L AU - Schoning A AU - Schorner-Sadenius T AU - Schroder V AU - Schultz-Coulon HC AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Antwerp, B-2020 Antwerp, BelgiumInter Univ Inst High Energies ULB VUB, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPHNE, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany TI - Measurement of inclusive jet cross-sections in deep-inelastic ep scattering at HERA AB - A measurement of inclusive jet cross-sections in deep-inelastic ep scattering at HERA is presented based on data with an integrated luminosity of 21.1 pb(-1). The measurement is performed for photon virtualities Q(2) between 5 and 100 GeV2, differentially in Q(2), in the jet transverse energy E-T, in E-T(2)/Q(2) and in the pseudorapidity eta(lab). With the renormalization scale mu(R) = E-T, perturbative QCD calculations in next-to-leading order (NLO) give a good description of the data in most of the phase space. Significant discrepancies are observed only for jets in the proton beam direction with ET below 20 GeV and Q2 below 20 GeV2. This corresponds to the region in which NLO corrections are largest and further improvement of the calculations is thus of particular interest. (C) 2002 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177994300003 L2 - LIQUID ARGON CALORIMETER; MONTE-CARLO GENERATOR; TO-LEADING ORDER; LEAD/SCINTILLATING-FIBER CALORIMETER; QUANTUM CHROMODYNAMICS; CLUSTERING ALGORITHMS; HADRON-COLLISIONS; DIJET PRODUCTION; VIRTUAL PHOTONS; QCD ANALYSIS SO - Physics Letters B 2002 ;542(3-4):193-206 4675 UI - 10356 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boehme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Jeamanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, D-24098 Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, CNRS, LPNHE, IN2P3, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, VenezuelaUniv PJ Safarik, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Energy flow and rapidity gaps between jets in photoproduction at HERA AB - Dijet events in photon-proton collisions in which there is a large pseudorapidity separation, Deltaeta > 2.5 between the two highest E-T jets are studied with the H1 detector at HERA. The inclusive dijet cross sections are measured as functions of the longitudinal momentum fractions of the proton and photon which participate in the production of the jets, x(p)(jets) and x(gamma)(jets) respectively, Deltaeta, the pseudorapidity P separation between the two highest E-T jets, and E-T(gap), the total summed transverse energy between the jets. Rapidity gap events are defined as events in which E-T(gap) is less than E-T(cut), for E-T(cut) varied between jets 0.5 and 2.0 GeV. The fraction of dijet events with a rapidity gap is measured differentially in Deltaeta, x(p)(jets) and x(gamma)(jets). An excess of events with rapidity gaps at low values of E-T(cut) is observed above the expectation from standard photoproduction processes. This excess can be explained by the exchange of a strongly interacting colour singlet object between the jets MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - Venezuela PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000177679700001 L2 - COLOR-SINGLET EXCHANGE; HADRON-HADRON COLLISIONS; P(P)OVER-BAR COLLISIONS; (P)OVER-BAR-P COLLISIONS; CALORIMETER; SCATTERING; TEV; QCD SO - European Physical Journal C 2002 ;24(4):517-527 4676 UI - 10423 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet A AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Kurca T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Malinovski I AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, ULB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, DSM, DAPNIA, CE Saclay, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanySwiss Fed Inst Technol, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Inst Expt Kernphys, Wuppertal, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, VenezuelaUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Diffractive photoproduction of psi(2S) mesons at HERA AB - Results on diffractive photoproduction of psi(2S) mesons are presented using data collected between 1996 and 2000 with the H1 detector at the HERA ep collider. The data correspond to an integrated luminosity of 77 pb(-1). The energy dependence of the diffractive psi(2S) cross section is found to be similar to or possibly somewhat steeper than that for J/psi mesons. The dependences of the elastic and proton dissociative psi(2S) photoproduction cross sections on the squared momentum transfer t at the proton vertex are measured. The t-dependence of the elastic channel, parametrised as e(bt), yields b(el)(psi(2S)) = (4.31 +/- 0.57 +/- 0.46) GeV-2, compatible with that of the J/psi. For the proton dissociative channel the result b(pd)(psi(2S)) = (0.59 +/- 0.13 +/- 0.12) GeV-2 is 2.3 standard deviations smaller than that measured for the J/psi. With proper account of the individual wavefunctions theoretical predictions based on perturbative QCD are found to describe the measurements well. (C) 2002 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177558200007 L2 - ELASTIC PHOTOPRODUCTION; COLOR TRANSPARENCY; EP COLLISIONS; H1 DETECTOR; CALORIMETER; J/PSI SO - Physics Letters B 2002 ;541(3-4):251-264 4677 UI - 10895 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti L AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AU - Schilling FP AU - Schleper P AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, B-2610 Wilrijk, BelgiumFree Univ Brussels, ULB, Interuniv Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCE Saclay, CEA, DSM, DAPINA, Gif Sur Yvette, FranceDESY, Hamburg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaLebedev Phys Inst, Moscow, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceCNRS, Ecole Polytech, LPNHE, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Rome Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of dijet electroproduction at small jet separation AB - Deep-inelastic scattering data in the range 150 < Q(2) < 35000 GeV2 are used to investigate the minimum jet separation necessary to allow accurate description of the rate of dijet production using next-to-leading order perturbative QCD calculations. The required jet separation is found to be small, allowing about 1/3 of DIS data to be classified as dijet, as opposed to approximately 1/10 with more typical jet analyses. A number of precision measurements made using this dijet sample are well described by the calculations. The data are also described by the combination of leading order matrix elements and parton showers, as implemented in the QCD based Monte Carlo model RAPGAP MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000176325300003 L2 - DEEP-INELASTIC SCATTERING; POSITRON-PROTON COLLISIONS; CURRENT CROSS-SECTIONS; MONTE-CARLO GENERATOR; HIGH Q(2); PARTON DISTRIBUTIONS; QCD ANALYSIS; HERA; ALPHA(S); FRAGMENTATION SO - European Physical Journal C 2002 ;24(1):33-41 4678 UI - 11546 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Campbell AJ AU - Cao J AU - Carli T AU - Caron S AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Foster JM AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg M AU - Goodwin C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek L AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Jansen DM AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kastli HK AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Merkel P AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, InterUniv Inst High Energies, ULB, VUB, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandJoint Nucl Res Inst, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys 2, D-2000 Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, D-24098 Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, S-22100 Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of D*(+/-) meson production and F-2(c) in deep-inelastic scattering at HERA AB - The inclusive production of D*+/-(2010) mesons in deep-inelastic scattering is studied with the HI detector at HERA. In the kinematic region 1 < Q(2) < 100 GeV2 and 0.05 < y < 0.7 an e(+) p cross section for inclusive D*+/- meson production of 8.50 +/- 0.42(stat.)(-100)(+1.21)(syst.) nb is measured in the visible range p(tD*) > 1.5 GeV and \eta(D*)\ < 1.5. Single and double differential inclusive D*+/- meson cross sections are compared to perturbative QCD calculations in two different evolution schemes, The charm contribution to the proton structure, F-c(2)(x, Q(2)), is determined by extrapolating the visible charm cross section to the full phase space. This contribution is found to rise from about 10% at Q(2) = 1.5 GeV2 to more than 25% at Q(2) = 60 GeV2 corresponding to x values ranging from 5 x 10(-5) to 3 x 10(-3). (C) 2002 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 46 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000174479000005 L2 - INITIAL STATE RADIATION; MONTE-CARLO GENERATOR; HEAVY QUARKS; SMALL-X; O(ALPHA-S) CORRECTIONS; PERTURBATION-THEORY; JET FRAGMENTATION; E+E ANNIHILATION; EVENT GENERATOR; CROSS-SECTIONS SO - Physics Letters B 2002 ;528(3-4):199-214 4679 UI - 11972 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Arkadov V AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Bate P AU - Becker J AU - Beglarian A AU - Behnke O AU - Beier C AU - Belousov A AU - Benisch T AU - Berger C AU - Berndt T AU - Bizot JC AU - Boehme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruckner W AU - Bruncko D AU - Burger J AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Clarke D AU - Clerbaux B AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson A AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Goldberg A AU - Grab C AU - Grassler H AU - Greenshaw T AU - Grindhammmer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers A AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hurling S AU - Ibbotson M AU - Issever C AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson A AU - Karschnick O AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kermiche S AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Krehbiel H AU - Kroseberg J AU - Kruger K AU - Kupper A AU - Kuhr T AU - Kurca T AU - Lahmann R AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindstroem M AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Mahlke-Kruger H AU - Malden N AU - Malinovski E AU - Malinovski I AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Meyer PO AU - Mikocki S AU - Milstead D AU - Mkrtchyan T AU - Mohr R AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Nellen G AU - Newman PR AU - Nicholls TC AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rabbertz K AU - Radel G AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Reyna D AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, Inter Univ Inst High Energies, ULB VUB, B-2610 Wilrijk, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt 2, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angewandte Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, CPPM, INP23, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, INP23, Orsay, FranceEcole Polytech, CNRS, LPNHE, INP23, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, INP23, Paris, FranceUniv Paris 07, LPNHE, CNRS, INP23, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH Zurich, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceBerg Univ Gesamthochschule, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Mexico City 14000, DF, MexicoAdloff, C, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Search for excited neutrinos at HERA AB - We present a search for excited neutrinos using e(-) p data taken by the H1 experiment at HERA at a center-of-mass energy of 318 GeV with an integrated luminosity of 15 pb(-1). No evidence for excited neutrino production is found. Mass dependent exclusion limits are determined for the ratio of the coupling to the compositeness scale, f/Lambda, independently of the relative couplings to the SU(2) and U(1) gauge bosons. These limits extend the excluded region to higher masses than has been possible in previous searches at other colliders. (C) 2002 Elsevier Science B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000173277200002 L2 - LIQUID ARGON CALORIMETER; LEPTON PRODUCTION; H1; CALIBRATION; SCATTERING; COMPOSITE; FERMIONS; PHYSICS; HEAVY SO - Physics Letters B 2002 ;525(1-2):9-16 4680 UI - 9995 AU - Afraimovich V AU - Chazottes JR AU - Ugalde E AD - Univ Autonoma San Luis Potosi, IICO, San Luis Potosi 78000, MexicoEcole Polytech, CPHT, F-91128 Palaiseau, FranceAfraimovich, V, Univ Autonoma San Luis Potosi, IICO, San Luis Potosi 78000, Mexico TI - Spectra of dimensions for Poincare recurrences for special flows AB - We prove the variational principle for dimensions for Poincare recurrences, in the case of invariant sets of dynamical systems with continuous time. To achieve this goal we show that these dimensions can be expressed as roots of a non-homogeneous Bowen equation MH - France MH - Mexico|San Luis Potosi PB - HSINCHU: MATHEMATICAL SOC REP CHINA RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1027-5487 UR - ISI:000178772900010 L2 - dimension theory;Poincare recurrences;special flows;ENTROPY SO - Taiwanese Journal of Mathematics 2002 ;6(2):269-285 4681 UI - 10520 AU - Afraimovich V AU - Cordonet A AU - Rulkov NF AD - UASLP, IICO, San Luis Potosi 78000, MexicoUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAAfraimovich, V, UASLP, IICO, A Obregon 64, San Luis Potosi 78000, Mexico TI - Generalized synchronization of chaos in noninvertible maps AB - The properties of functional relation between a noninvertible chaotic drive and a response map in the regime of generalized synchronization of chaos are studied. It is shown that despite a very fuzzy image of the relation between the current states of the maps, the functional relation becomes apparent when a sufficient interval of driving trajectory is taken into account. This paper develops a theoretical framework of such functional relation and illustrates the main theoretical conclusions using numerical simulations MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000177200600056 L2 - COUPLED DYNAMICAL-SYSTEMS; PHASE SYNCHRONIZATION; INVARIANT-MANIFOLDS SO - Physical Review e 2002 ;66(1): 4682 UI - 10267 AU - Aggeler R AU - Coons J AU - Taylor SW AU - Ghosh SS AU - Garcia JJ AU - Capaldi RA AU - Marusich MF AD - Univ Oregon, Inst Mol Biol, Eugene, OR 97403, USAMitoKor, San Diego, CA 92121, USAInst Nacl Cardiol, Dept Bioquim, Mexico City 14080, DF, MexicoCapaldi, RA, Univ Oregon, Inst Mol Biol, Eugene, OR 97403, USA TI - A functionally active human F1F0 ATPase can be purified by immunocapture from heart tissue and fibroblast cell lines AB - Human mitochondrial F1F0 ATP synthase was isolated with a one-step immunological approach, using a monoclonal antibody against F-1 in a 96-well microplate activity assay system, to establish a method for fast high throughput screening of inhibitors, toxins, and drugs with very small amounts of enzyme. For preparative purification, mitochondria from human heart tissue as well as cultured fibroblasts were solubilized with dodecyl-beta-D-maltoside, and the F1F0 was isolated with anti-F-1 monoclonal antibody coupled to protein G-agarose beads. The immunoprecipitated F1F0 contained a full complement of subunits that were identified with specific antibodies against five of the subunits (alpha, beta, OSCP, d, and IF1) and by MALDI-TOF and/or LC/MS/MS for all subunits except subunit c, which could not be resolved by these methods because of the limits of detection. Microscale immunocapture of F1F0 from detergent-solubilized mitochondria or whole cell fibroblast extracts was performed using anti-F-1 monoclonal antibody immobilized on 96-well microplates. The captured complex V displayed ATP hydrolysis activity that was fully oligomycin and inhibitor protein IF1-sensitive. Moreover, IF1 could be co-isolated with F1F0 when the immunocapture procedure was carried out at pH 6.5 but was absent when the ATP synthase was isolated at pH 8.0. Immunocaptured F1F0 lacking IF1 could be inhibited by more than 90% by addition of recombinant inhibitor protein, and conversely, F1F0 containing IF1 could be activated more than 10-fold by brief exposure to pH 8.0, inducing the release of inhibitor protein. With this microplate system an ATP hydrolysis assay of complex V could be carried out with as little as 10 ng of heart mitochondria/well and as few as 3 X 10(4) cells/well from fibroblast cultures. The system is therefore suitable to screen patient-derived samples for alterations in amount or functionality of both the F1F0 ATPase and IF1 MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000177959100052 L2 - MITOCHONDRIAL-DNA MUTATIONS; INHIBITOR PROTEIN; COMPLEX-I; SYNTHASE; SUBUNIT; PURIFICATION; DISEASE; MTDNA; F1F0-ATPASE; F1-ATPASE SO - Journal of Biological Chemistry 2002 ;277(37):33906-33912 4683 UI - 11020 AU - Aguiar JA AU - Ferreira NO AU - Ferreira JM AU - Montarroyos E AU - Yadava YP AU - Ferreira RAS AU - Guzmann J AU - Chavira E AD - Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, BrazilUniv Fed Pernambuco, Dept Engn Mecan, BR-50741350 Recife, PE, BrazilUniv Autonoma Mexico, Inst Invest Mat, Mexico City 70630, DF, MexicoAguiar, JA, Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil TI - Microstructure and superconducting properties of LaBaCaCu3O7-delta-Ba2HoNbO6 ceramic composite AB - In this work, we have synthesized and studied structural and microstructural characteristics of LaBaCaCu3O7-delta-Ba2HoNbO6 composites Ba2HoNbO6 has an A(2)BB'O-6 complex cubic perovskite structure with lattice constant a = 8.439Angstrom. Ba2HoNbO6 is chemically and physically compatible with LaBaCaCu3O7-delta superconductor. So, we infer that Ba2HoNbO6 could be a potential substrate material for the fabrication of the LaBaCaCu3O7-delta superconducting films MH - Brazil MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 1058-725X UR - ISI:000175887000033 L2 - LaBaCaCu3O7-delta;Ba2HoNbO6;ssuperconducting composites;MAGNETIC-PROPERTIES; OXIDE SO - Molecular Crystals and Liquid Crystals 2002 ;374():211-216 4684 UI - 10194 AU - Aguilar CN AU - Favela-Torres E AU - Viniegra-Gonzalez G AU - Augur C AD - Univ Autonoma Coahuila, Food Res Dept, Fac Chem Sci, Unidad Saltillo, Coahuila 25000, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Unidad Iztapalapa, Mexico City 09340, DF, MexicoIRD France, CESB ESIL, Inst Rech Dev, F-13288 Marseille, FranceAugur, C, Univ Georgia, Complex Carbohydrate Res Ctr, 220 Riverbend Rd, Athens, GA 30602 USA TI - Culture conditions dictate protease and tannase production in submerged and solid-state cultures of Aspergillus niger Aa-20 AB - Undesirable protease production by Aspergillus niger Aa-20 in submerged culture and solid-state culture was evaluated using different concentrations of tannic acid as sole carbon source in a model system designed for tannase production. Protease production was found to be dependent on the culture system used (submerged culture or solid-state culture) and on the initial tannic acid concentration. Expression of protease activity in submerged culture was higher (up to 10 times) than activity obtained in solid-state culture, using identical culture medium composition. In submerged culture, the lowest final protease activity (0.13 IU) was obtained with the highest tannic acid concentration, while in solid-state culture protease activity was not affected by changes in initial substrate concentration. Absence of detectable proteolytic activity in solid-state culture is related to high production of tannase enzyme. Hence, the use of solid-state culture for fungal enzyme production may allow for higher and more stable enzyme titers present in culture extracts MH - France MH - USA MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0273-2289 UR - ISI:000178352200036 L2 - protease;solid-state fermentation;tannase;tannin acyl hydrolase;liquid fermentation;submerged fermentation;Aspergillus niger;tannic acid;EXTRACELLULAR PROTEASE; SUBSTRATE FERMENTATION; AMYLASE PRODUCTION; WATER ACTIVITY; ORYZAE; ENZYMES; PURIFICATION; LIQUID SO - Applied Biochemistry and Biotechnology 2002 ;102():407-414 4685 UI - 9560 AU - Aguilar EA AU - Leon CA AU - Contreras A AU - Lopez VH AU - Drew RAL AU - Bedolla E AD - Univ Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoMcGill Univ, Dept Min Met & Mat Engn, Montreal, PQ H3A 2B2, CanadaBedolla, E, Univ Michoacana, Inst Invest Met, Apdo Postal 888, Morelia 58000, Michoacan, Mexico TI - Wettability and phase formation in TiC/Al-alloys assemblies AB - The effect of alloying elements on the wetting behavior of TiC substrates by commercial aluminum alloys (1010, 2024, 6061, 7075) and its relation to phase formation at the metal-ceramic interface was investigated at 900 degreesC using a sessile drop technique. It was found that wetting behavior in Al-alloys/TiC is typical of reactive systems, furthermore, wettability of TiC by pure Al-1010 was better than the alloys. Interface examination revealed the formation of Al4C3 in all the cases; the thickness of the reaction layer varied within the samples and was discontinuous in nature, particularly for the 7075/TiC and 6061/TiC systems, which exhibited poor wetting. The formation of alloyed phases in the ceramic surface decreased the amount of the undesirable Al4C3 at the metaVceramic interface. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Michoacan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Manufacturing;Materials Science, Composites U5 - J;Article AV - English IS - 1359-835X UR - ISI:000179976800025 L2 - wettability;microstructure;electron microscopy;consolidation;METAL-MATRIX COMPOSITES; INFILTRATION; ALUMINUM; SYSTEM SO - Composites Part A-Applied Science and Manufacturing 2002 ;33(10):1425-1428 4686 UI - 9983 AU - Aguilar JC AD - Inst Tecnol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, MexicoNYU, Courant Inst Math Sci, New York, NY 10012, USAAguilar, JC, Inst Tecnol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, Mexico TI - High-order corrected trapezoidal quadrature rules for functions with a logarithmic singularity in 2-D AB - In this report, we construct correction coefficients to obtain high-order trapezoidal quadrature rules to evaluate two-dimensional integrals with a logarithmic singularity of the form J(v) =integral(D) v(x, y)ln (rootx(2)+y(2)) dx dy, where the domain D is a square containing the point of singularity (0,0) and v is a C-infinity function defined on the whole plane R-2. The procedure we use is a generalization to 2-D of the method of central corrections for logarithmic singularities described in [1]. As in 1-D, the correction coefficients are independent of the number of sampling points used to discretize the square D. When v has compact support contained in D, the approximation is the trapezoidal rule plus a local weighted sum of the values of v around the point of singularity. These quadrature rules give an efficient, stable, and accurate way of approximating J(v). We provide the correction coefficients to obtain corrected trapezoidal quadrature rules up to order 20. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Interdisciplinary Applications;Mathematics, Applied U5 - J;Article AV - English IS - 0898-1221 UR - ISI:000178900700004 SO - Computers & Mathematics with Applications 2002 ;44(8-9):1031-1039 4687 UI - 11029 AU - Aguilar M AU - Bernaus JM AU - Caus E AU - Hottinger L AD - Univ Autonoma Barcelona, Dept Geol, E-08193 Barcelona, SpainMuseum Hist Nat, CH-4001 Basel, SwitzerlandInst Mexicano Petr, Mexico City 07730, DF, MexicoCaus, E, Univ Autonoma Barcelona, Dept Geol, E-08193 Barcelona, Spain TI - Lepidorbitoides minima Douville from Mexico, a foraminiferal index fossil for the Campanian AB - Mexican topotypes of Lepidorbitoides minima Douville, type species of the genus Orbitocyclina Vaughan 1929, exhibit an orbitoidiform architecture conditioned by an obliquely-overcrossed stolon system in only three stolon planes in the medium layer of the shell and arising from a single auxiliary chamberlet. This architecture is identical with the one observed in Campanian early species of the Tethyan genus Lepidorbitoides. Orbitocyclina is therefore placed in synonymy with Lepidorbitoides Silvestri, 1907. This opens the way for a transatlantic biozonation based on quantitative methods supported by evolutionary theory using nepionic acceleration as a measurable feature MH - Mexico|Distrito Federal MH - Spain MH - Switzerland PB - CAMBRIDGE: CUSHMAN FOUNDATION FORAMINIFERAL RES RP - NOT IN FILE U3 - TC 1 U4 - Paleontology U5 - J;Article AV - English IS - 0096-1191 UR - ISI:000175909500003 SO - Journal of Foraminiferal Research 2002 ;32(2):126-134 4688 UI - 11261 AU - Aguilar M AU - Quintana P AU - Oliva AI AD - Inst Ciencia Mat, Madrid 28049, SpainIPN, CINVESTAV, Dept Appl Sci, Unidad Merida, Merida 97310, Yucatan, Mexico TI - Thickness-stress relations in aluminum thin films AB - The physical properties of aluminum thin films depend strongly on their microstructure, which can be characterized using different techniques. In the present work, aluminum thin films-grown with different thickness on silicon substrates-were analyzed by atomic force microscopy (AFM) and grazing incidence x-ray techniques. The AFM was used as a high-resolution profilemeter for measuring edge angles, step heights, surface micro structure, and roughness. The structural properties (such as crystallographic orientation, crystallite size, and phase identification) were analyzed by grazing incidence x-ray diffraction. For small thickness, AFM images show small nucleation sites because of the short time of growth. Grain size grows as the thickness increases, and film morphology seems to be uniform with large grains. The AFM results of as-grown films show a linear increase in roughness along with thickness. Roughness values decrease with aging time after film preparation, until a constant value is observed. All films mainly have (111) orientation, and its intensity grows with film thickness, with respect to the (200) and (220) peaks. As the film thickness increases, the surface stress decreases MH - Mexico|Yucatan MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1042-6914 UR - ISI:000175240500006 L2 - X-RAY-DIFFRACTION; GRAZING-INCIDENCE; STRAIN ANALYSIS; METAL-FILMS; GROWTH; LINES SO - Materials and Manufacturing Processes 2002 ;17(1):57-65 4689 UI - 9864 AU - Aguilar R AU - Ramirez JA AU - Garrote G AU - Vazquez M AD - Univ Santiago Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Los Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, UAM Mante, Dept Food Engn, Tamaulipas 89840, MexicoUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoVazquez, M, Univ Santiago Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Los Alimentos, Campus Lugo, Lugo 27002, Spain TI - Kinetic study of the acid hydrolysis of sugar cane bagasse AB - Economic interest in xylitol production can be enhanced if the needed xylose solutions can be obtained from the hydrolysis of low-cost lignocellulosic wastes. Sugar cane bagasse is a renewable, cheap and widely available waste in tropical countries. The hydrolysis of sugar cane bagasse to obtain xylose solutions has a double consequence, the elimination of a waste and the generation of a value-added product. The objective of this work was to study the xylose production from sugar cane bagasse by sulphuric acid hydrolysis at several temperatures (100, 122 and 128 degreesC) and con cent rations of acid (2%, 4% and 6%). Kinetic models were developed to explain the variation with time of xylose, glucose, acetic acid and furfural generated in the hydrolysis. Optimal conditions found were 2% H2SO4 at 122 degreesC for 24 min. which yielded a solution with 21.6 g xlose/l, 3 g glucose/l 0.5 g furfural/l and 3.65 g acetic acid/l. In these conditions, approximate to90% of the hemicelluloses was hydrolysed. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 24 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000179242700004 L2 - PINUS-PINASTER WOOD; HEMICELLULOSIC FRACTION; ETHANOL-PRODUCTION; EUCALYPTUS WOOD; PICHIA-STIPITIS; SULFURIC-ACID; PREHYDROLYSIS; AUTOHYDROLYSIS; FERMENTATION; XYLITOL SO - Journal of Food Engineering 2002 ;55(4):309-318 4690 UI - 9965 AU - Aguirre A AU - Tapia JL AU - Ciancio S AU - Coniglio J AD - Univ Buffalo, Dept Oral Diagnost Sci, Sch Dent Med, Buffalo, NY 14214, USAUniv Buffalo, Adv Oral & Maxillofacial Pathol Program, Buffalo, NY 14214, USANatl Autonomous Univ Mexico, CONACyT, Natl Council Sci & Technol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Odontol, Mexico City 04510, DF, MexicoUniv Buffalo, Dept Periodontol, Sch Dent Med, Buffalo, NY, USAAguirre, A, Univ Buffalo, Dept Oral Diagnost Sci, Sch Dent Med, 355 Squire Hall, Buffalo, NY 14214 USA TI - Serendipitous diagnosis of protein S deficiency AB - A 46-year-old male sought periodontal care for a swelling on his right mandibular gingiva. An excisional biopsy revealed a well-differentiated squamous cell carcinoma. Surgical treatment consisted of a right segmental mandibulectomy with ipsilateral right neck dissection and fibular free flap reconstruction. Two days after the surgical procedure, a weakened Doppler signal suggested vascular compromise of the graft. The patient was returned to the operating room where complete thrombosis of the internal jugular vein (recipient vessel) was observed. This event prompted a complete hematological evaluation that disclosed low serum levels of protein S. The patient was started on systemic heparin and local medicinal leeches. A week later, systemic warfarin sodium was added and successfully resolved the vascular compromise of the graft. Two years later, the patient is active and lives a full life with occasional adjustments of warfarin sodium. This case represents the first report on the treatment of gingival carcinoma that led to the serendipitous discovery of an unrelated and unusual systemic condition, protein S deficiency MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: AMER ACAD PERIODONTOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-3492 UR - ISI:000178823100015 L2 - protein S deficiency/diagnosis;follow-up studies;SQUAMOUS-CELL CARCINOMA; VENOUS THROMBOSIS; GINGIVA; COFACTOR SO - Journal of Periodontology 2002 ;73(10):1197-1201 4691 UI - 9344 AU - Ahluwalia DV AU - Dadhich N AU - Kirchbach M AD - UAZ, Fac Fis, Theoret Phys Grp, Zacatecas 98062, MexicoInteruniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, IndiaAhluwalia, DV, UAZ, Fac Fis, Theoret Phys Grp, Ap Postal C-600, Zacatecas 98062, Mexico TI - On the spin of gravitational bosons AB - We unearth spacetime structure of massive vector bosons, gravitinos, and gravitons. While the curvatures associated with these particles carry a definite spin, the underlying potentials cannot be, and should not be, interpreted as single spin objects. For instance, we predict that a spin measurement in the rest frame of a massive gravitino will yield the result 3/2 with probability one half, and 1/2 with probability one half. The simplest scenario leaves the Riemannian curvature unaltered; thus avoiding conflicts with classical tests of the theory of general relativity. However, the quantum structure acquires additional contributions to the propagators, and it gives rise to additional phases MH - India MH - Mexico|Zacatecas PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000180584600019 L2 - GENERALIZED UNCERTAINTY PRINCIPLE; QUANTUM-GRAVITY; NEUTRINO OSCILLATIONS; EQUIVALENCE PRINCIPLE; SPACE-TIME; MATTER; MASS; VIOLATION; DUALITY; FIELDS SO - International Journal of Modern Physics D 2002 ;11(10):1621-1634 4692 UI - 11593 AU - Ahluwalia DV AU - Liu Y AU - Stancu I AD - UAZ, Fac Fis, Zacatecas 98062, MexicoUniv Grenoble 1, Inst Sci Nucl, IN2P3, F-38026 St Martin Dheres, FranceUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAAhluwalia, DV, UAZ, Fac Fis, Ap Postal C-s600, Zacatecas 98062, Mexico TI - CP-violation in neutrino oscillations and L/E flatness of the e-like event ratio at Super-Kamiokande AB - We show that if the presently observed L/E-flatness of the electron-like event ratio in the Super-Kamiokande atmospheric neutrino data is confirmed, then the indicated ratio must be unity. Further, it is found that once CP is violated the exact L/E flatness implies: (a) the CP-violating phase, in the standard parametrization, is narrowed down to two possibilities +/-pi/2, and (b) the mixing between the second and the third generations must be maximal. With these results at hand, we argue that a dedicated study of the L/E-flatness of the electron-like event ratio by Super-Kamiokande can serve as an initial investigatory probe of CP violation in the neutrino sector. The assumptions under which these results hold are explicitly stated MH - France MH - Mexico|Zacatecas MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000174475200002 L2 - neutrino oscillations;CP-violation;atmospheric neutrinos;bi-maximal mixing;QUARK MASS MATRICES; DOUBLE-BETA DECAY; ART. NO. 073002; QUANTUM-MECHANICS; GRAVITY; PROPAGATION; INTERPLAY; COSMOLOGY; PHYSICS; MUONS SO - Modern Physics Letters A 2002 ;17(1):13-21 4693 UI - 11168 AU - Ahn J AU - Gan B AU - Zhang Q AU - Rusli AU - Yoon SF AU - Ligatchev V AU - Wang SG AU - Huang QF AU - Chew K AU - Melendrez R AU - Barboza-Flores M AD - Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, SingaporeUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoAhn, J, Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore TI - Application of CVD diamond films for UV thermoluminescence dosimeter AB - This study presents the investigation of CVD diamond for the application of an UV TL dosimeter. A 9-mum-thick film used in this study presents a TL glow curve with a well-defined first-order kinetic shape. A prominent TL band peaked at 585 K is observed. A low temperature peak (at about 273 K), which normally presents in the glow curve from ionizing radiations, is not observed. By fitting the glow curve to a first-order kinetic model, the trap activation energy E-t = 0.95 eV and frequency factor s = 5.6 x 10(6) s(-1) have been resolved MH - Mexico|Sonora MH - Singapore PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9792 UR - ISI:000175471600033 L2 - DEPENDENCE SO - International Journal of Modern Physics B 2002 ;16(6-7):1003-1007 4694 UI - 10064 AU - Ahn K AU - Kosevich YA AU - Kim MW AD - Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South KoreaUniv Autonoma San Louis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoAhn, K, Korea Adv Inst Sci & Technol, Dept Phys, 373-1 Kusong Dong, Taejon 305701, South Korea TI - Coexistence of two elastic surface modes enhanced by viscous losses AB - Spatial profiles of electrically excited surface waves on agarose gels were measured as a function of frequency and concentration of the agarose. Two surface waves were observed in the low-frequency region. One is a Rayleigh wave, which shows the elastic behavior up to a certain frequency and then gradually disappears with the increase in frequency. The other wave is also elastic; however, it has higher value of phase velocity than the Rayleigh wave and approaches the dispersion of the capillary wave in the high-frequency region. The surface response function analysis shows that the semi-infinite viscoelastic media support the propagation of the two elastic surface waves, but not the propagation of the elastic and pure capillary waves as was claimed previously. Moreover, the theoretical analysis reveals that the viscous losses effectively enhance the coexistence of the two elastic surface modes MH - Mexico|San Luis Potosi MH - South Korea PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000178620900012 L2 - POLYMER-SOLUTIONS; SOFT GELS; CAPILLARY WAVE; CROSSOVER; PROPAGATION; CRYSTALS SO - Europhysics Letters 2002 ;60(2):241-247 4695 UI - 6300 AU - Aichholzer O AU - Bremner D AU - Demaine ED AU - Hurtado F AU - Kranakis E AU - Krasser H AU - Ramaswami S AU - Sethia S AU - Urrutia J AD - Graz Univ Technol, IICM Softwaretechnol, A-8010 Graz, Austria. Univ New Brunswick, Fac Comp Sci, Fredericton, NB E3B 5A3, Canada. MIT, Comp Sci Lab, Cambridge, MA 02139, USA. Univ Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, Spain. Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, Canada. Graz Univ Technol, Inst Theoret Comp Sci, A-8010 Graz, Austria. Rutgers State Univ, Dept Comp Sci, Camden, NJ 08102, USA. Oregon State Univ, Dept Comp Sci, Corvallis, OR 97331, USA. Univ Nacl Autonoma Mexico, Inst Matemat, Area Inv Cient, Mexico City 04510, DF, Mexico TI - Playing with triangulations AB - We analyze several perfect-information combinatorial games played on planar triangulations. We introduce three broad categories of such games: constructing, transforming, and marking triangulations. In various situations, we develop polynomial-time algorithms to determine who wins a given game under optimal play, and to find a winning strategy. Along the way, we show connections to existing combinatorial games such as Kayles MH - Austria MH - Canada MH - Mexico|Distrito Federal MH - Spain MH - USA T3 - DISCRETE AND COMPUTATIONAL GEOMETRYLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleoaich@igi.tu-graz.ac.at bremner@unb.ca edemaine@mit.edu hurtado@ma2.upc.es kranakis@scs.carleton.ca hkrasser@igi.tu-graz.ac.at rsuneeta@crab.rutgers.edu saurabh@cs.orst.edu urrutia@math.unam.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY30M AV - English IS - 0302-9743 UR - ISI:000188862800004 SO - 2002 ;():22-37 4696 UI - 10211 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - Massafferri A AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Salinas CJS AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Univ Mississippi Oxford, University, MS 38677, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 14000, DF, MexicoFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv Republica, Montevideo, UruguayUniv Fed Itajuba, Itajuba, BrazilUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Univ Mississippi Oxford, University, MS 38677, USA TI - Dalitz plot analysis of the decay D+ -> K- pi(+) pi(+) and indication of a low-mass scalar K pi resonance AB - We study the Dalitz plot of the decay D+ --> K- pi(+) pi(+) with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known Kpi resonances and a uniform nonresonant term, we do not obtain an acceptable fit If we allow the mass and width of the K-0*(1430) to float, we obtain values consistent with those from PDG but the chi(2) per degree of freedom of the fit is still unsatisfactory. A good fit is found when we allow for the presence of an additional scalar resonance, with mass 797 +/- 19 +/- 43 MeV/c(2) and width 410 +/- 43 +/- 87 MeV/c(2). The mass and width of the K-0*(1430) become 1459 +/- 7 +/- 5 MeV/c(2) and 175 +/- 12 +/- 12 MeV/c(2), respectively. Our results provide new information on the scalar sector in hadron spectroscopy MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Uruguay MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 94 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000178166900005 L2 - CHARM MESON DECAYS; S-WAVE; SCATTERING; NONET; KAPPA(900); CLASSIFICATION; MODEL SO - Physical Review Letters 2002 ;89(12): 4697 UI - 10615 AU - Aitala EM AU - Amato S AU - Anjos JC AU - Appel JA AU - Ashery D AU - Banerjee S AU - Bediaga I AU - Blaylock G AU - Bracker SB AU - Burchat PR AU - Burnstein RA AU - Carter T AU - Carvalho HS AU - Copty NK AU - Cremaldi LM AU - Darling C AU - Denisenko K AU - Devmal S AU - Fernandez A AU - Fox GF AU - Gagnon P AU - Gobel C AU - Gounder K AU - Halling AM AU - Herrera G AU - Hurvits G AU - James C AU - Kasper PA AU - Kwan S AU - Langs DC AU - Leslie J AU - Lundberg B AU - Magnin J AU - Massafferri A AU - MayTal-Beck S AU - Meadows B AU - Neto JRTD AU - Mihalcea D AU - Milburn RH AU - de Miranda JM AU - Napier A AU - Nguyen A AU - d'Oliveira AB AU - O'Shaughnessy K AU - Peng KC AU - Perera LP AU - Purohit MV AU - Quinn B AU - Radeztsky S AU - Rafatian A AU - Reay NW AU - Reidy JJ AU - dos Reis AC AU - Rubin HA AU - Sanders DA AU - Santha AKS AU - Santoro AFS AU - Schwartz AJ AU - Sheaff M AU - Sidwell RA AU - Slaughter AJ AU - Sokoloff MD AU - Salinas CJS AU - Stanton NR AU - Stefanski RJ AU - Stenson K AU - Summers DJ AU - Takach S AU - Thorne K AU - Tripathi AK AU - Watanabe S AU - Weiss-Babai R AU - Wiener J AU - Witchey N AU - Wolin E AU - Yang SM AU - Yi D AU - Yoshida S AU - Zaliznyak R AU - Zhang C AD - Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv Cincinnati, Cincinnati, OH 45221, USACINVESTAV, Mexico City 07000, DF, MexicoUniv Fed Itajuba, Itajuba, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIIT, Chicago, IL 60616, USAKansas State Univ, Manhattan, KS 66506, USAUniv Massachusetts, Amherst, MA 01003, USAUniv Mississippi, Mississippi State, MS 38677, USAPrinceton Univ, Princeton, NJ 08544, USAUniv Autonoma Puebla, Puebla 72570, MexicoUniv Republica, Montevideo, UruguayUniv S Carolina, Columbia, SC 29208, USAStanford Univ, Stanford, CA 94305, USATel Aviv Univ, IL-69978 Tel Aviv, IsraelTufts Univ, Medford, MA 02155, USAUniv Wisconsin, Madison, WI 53706, USAYale Univ, New Haven, CT 06511, USAAitala, EM, Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, Rio De Janeiro, Brazil TI - Differential cross sections, charge production asymmetry, and spin-density matrix elements for D*(+/-)(2010) produced in 500 GeV/c pi(-)-nucleon interactions AB - We report differential cross sections for the production of D*+/- (2010) produced in 500 GeV/c pi(-)-nucleon interactions from experiment E791 at Fermilab, as functions of Feynman-x (x(F)) and transverse momentum squared (p(T)(2)). We also report the D*+/- charge asymmetry and spin-density matrix elements as functions of these variables. Investigation of the spin-density matrix elements shows no evidence of polarization. The average values of the spin alignment are [eta] = 0.01 +/- 0.02 and -0.01 +/- 0.02 for leading and non-leading particles, respectively. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Israel MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Uruguay MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177030700004 L2 - charm hadroproduction;differential cross section;spin alignment;polarization;D-STAR; SYSTEM; PI SO - Physics Letters B 2002 ;539(3-4):218-226 4698 UI - 10338 AU - Aizman A AU - Contreras R AU - Galvan M AU - Cedillo A AU - Santos JC AU - Chamorro E AD - Univ Tecn Federico Santa Maria, Dept Quim, Valparaiso, ChileUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoUniv Chile, Dept Quim, Fac Ciencias, Santiago, ChileUniv Chile, Dept Fis, Fac Ciencias, Santiago, ChileAizman, A, Univ Tecn Federico Santa Maria, Dept Quim, Casilla 110-V, Valparaiso, Chile TI - The Markovnikov regioselectivity rule in the light of site activation models AB - The electrophilic addition of HCl to a series of asymmetric alkenes- propene, 2-methyl-2-butene, styrene, 2-phenylpropene, and 1-cyanopropene-is used as a model system to study the regioselectivity Markovnikov rule using density functional theory reactivity descriptors. The results show that this rule may be interpreted on the basis of a site activation model that goes beyond the Li-Evans model of selectivity if both the fluctuations in global softness and Fukui functions at the active site are taken into account. A local static analysis based on the condensed Fukui function at the ground state of alkenes was also performed. For all the systems considered, the Markovnikov carbon (M) atom (i.e., the less substituted one) displays electrophilic Fukui function values that are larger than those associated with the more substituted anti-Markovnikov (AM) carbon atom at the double bond. In most cases, they are also larger than the corresponding nucleophilic Fukui function values at both carbon centers of the ethylenic functionality. Site activation at the nucleophilic and electrophilic centers of the alkenes considered was probed by changes in regional softness with reference to the transition state structures. The results are consistent with the empirical Markovnikov rule. A global analysis of involved structures in the electrophilic addition of HCl shows that while the ground state and transition state structures display relative values of the energy and molecular hardness ordered in a way that is consistent with the maximum hardness principle (MHP), the comparison between the Markovnikov and anti-Markovnikov transition state structures do not: the Markovnikov channel presents a transition state which is lower in energy and softer than the one corresponding to the anti-Markovnikov addition MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000177705000028 L2 - DENSITY-FUNCTIONAL-APPROACH; ACID-BASE PRINCIPLE; CHEMICAL-REACTIVITY; FUKUI FUNCTION; HARDNESS; ELECTRONEGATIVITY; POLARIZABILITY; MOLECULES; SOFTNESS; CATALYSIS SO - Journal of Physical Chemistry A 2002 ;106(34):7844-7849 4699 UI - 10822 AU - Ajayan PM AU - Ramanath G AU - Terrones M AU - Ebbesen TW AD - Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USAIPICyT, San Luis Potosi 78210, MexicoUniv Strasbourg 1, ISIS, Lab Nanostruct, F-67000 Strasbourg, FranceAjayan, PM, Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA TI - Igniting nanotubes with a flash - Response MH - USA MH - France MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000176738100016 SO - Science 2002 ;297(5579):192-193 4700 UI - 11314 AU - Ajayan PM AU - Terrones M AU - de la Guardia A AU - Huc V AU - Grobert N AU - Wei BQ AU - Lezec H AU - Ramanath G AU - Ebbesen TW AD - Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USAIPICYT, San Luis Potosi 78210, MexicoUniv Sussex, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandUniv Strasbourg 1, ISIS, Lab Nanostruct, UMR 7006, F-67000 Strasbourg, FranceAjayan, PM, Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA TI - Nanotubes in a flash - Ignition and reconstruction MH - USA MH - United Kingdom MH - France MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 54 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000175281700045 L2 - CARBON NANOTUBES SO - Science 2002 ;296(5568):705-705 4701 UI - 11070 AU - Akerman JJ AU - Escudero R AU - Leighton C AU - Kim S AU - Rabson DA AU - Dave RW AU - Slaughter JM AU - Schuller IK AD - Univ Calif San Diego, Dept Phys 0319, La Jolla, CA 92093, USAUniv S Florida, Dept Phys, Tampa, FL 33620, USAMotorola Labs, Phys Sci Res Labs, Tempe, AZ 85284, USANatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAkerman, JJ, Univ Calif San Diego, Dept Phys 0319, La Jolla, CA 92093 USA TI - Criteria for ferromagnetic-insulator-ferromagnetic tunneling AB - The Rowell criteria, commonly used to identify tunneling in magnetic tunnel junctions (MTJ), are scrutinized. While neither the exponential-thickness dependence of the conductivity nor fits of non-linear transport data are found to be reliable tunneling criteria, the temperature-dependent conductivity does remain a solid criterion. Based on experimental studies of the bias and temperature-dependent resistance and magnetoresistance of MTJs, with and without shorted barriers, a new set of criteria is formulated. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000175813900025 L2 - magnetoresistance;thin films-trilayer;tunneling;ROOM-TEMPERATURE; POINT CONTACTS; JUNCTIONS; MAGNETORESISTANCE; METAL; NANOCONTACTS; RESISTANCE; BARRIERS; TRANSITION; QUALITY SO - Journal of Magnetism and Magnetic Materials 2002 ;240(1-3):86-91 4702 UI - 11055 AU - Akinay AE AU - Brostow W AU - Castano VM AU - Maksimov R AU - Olszynski P AD - Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USANatl Autonomous Univ Mexico, FATA, Dept Appl Phys & Adv Technol, Queretaro 76000, MexicoLatvian State Univ, Inst Polymer Mech, LV-1006 Riga, LatviaWroclaw Univ Technol, Inst Mat Sci & Appl Mech, PL-50370 Wroclaw, PolandBrostow, W, Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USA TI - Time-temperature correspondence prediction of stress relaxation of polymeric materials from a minimum of data AB - We have determined the stress relaxation of a longitudinal polymer liquid crystal (PLC), polypropylene and their blends containing 10 and 20% of the PLC at the constant strain of 0.5%. The results for nine temperature levels in the range between 20 and 100 C were used to create master curves for T-ref = 20degreesC. The temperature shift factors a(T) were calculated using a general formula derived by one of us and based on free volume of and the chain relaxation capability model. The predicted values agree with the experimental ones for all materials studied within limits of the experimental accuracy. Moreover, the relation between the shift factor a(T) and the reduced volume (ν) over bar has been used to predict long-term behavior of the materials from a minimum (at least two sets) of data-providing also in this case reliable results. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Latvia MH - Mexico|Queretaro MH - Poland MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000175738500002 L2 - time-temperature correspondence;stress relaxation;long-term polymer performance;TERM SERVICE PERFORMANCE; GRAFTED CARBON-FIBERS; LIQUID-CRYSTAL; SHIFT FACTOR; PHYSICOCHEMICAL PROPERTIES; EQUATION; STATE; SIMULATIONS; ORIENTATION; TRANSITION SO - Polymer 2002 ;43(13):3593-3600 4703 UI - 10750 AU - Aktosun T AU - Weder R AD - Mississippi State Univ, Dept Math & Stat, Mississippi State, MS 39762, USAUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sitemas, Mexico City 01000, DF, MexicoAktosun, T, Mississippi State Univ, Dept Math & Stat, Mississippi State, MS 39762 USA TI - Inverse scattering with partial information on the potential AB - The one-dimensional Schrodinger equation is considered when the potential is real valued and integrable and has a finite first moment. The recovery of such a potential is analyzed in terms of the scattering data consisting of a reflection coefficient, all the bound-state energies, knowledge of the potential on a finite interval, and all of the bound-state norming constants except one. It is shown that a missing norming constant in the data can cause at most a double nonuniqueness in the recovery. In the particular case when the missing norming constant in the data corresponds to the lowest-energy bound state, the necessary and sufficient conditions are obtained for the nonuniqueness, and the two norming constants and the corresponding potentials are determined. Some explicit examples are provided to illustrate the nonuniqueness. (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000176812100017 L2 - inverse scattering;Schrodinger equation;potential recovery with partial data;DIMENSIONAL SCHRODINGER-EQUATION; BOUND-STATES; LINE SO - Journal of Mathematical Analysis and Applications 2002 ;270(1):247-266 4704 UI - 11492 AU - Albarran G AU - Schuler RH AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Notre Dame, Radiat Lab, Notre Dame, IN 46556, USAAlbarran, G, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Micellar electrophoretic capillary chromatographic analysis of the products produced in the radiolytic oxidation of toluene and phenol AB - In this paper, we consider the effect of CH3 and OH substitution on a benzene ring in directing the site of OH radical attack in oxidative processes initiated by the gamma radiolysis of aqueous solutions of phenol and toluene. The analytical method used was micellar electrophoretic capillary chromatography. This approach permits the resolution of the radiolytic products resulting from the oxidation of the hydroxycyclohexadienyl radicals initially produced by addition of (OH)-O-. to the aromatic compounds and allows one to obtain a complete mechanistic picture of the radiation chemical processes, (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000174642000104 L2 - toluene;phenol;capillary electrophoresis;MECC;gamma radiolysis;HYDROXYLATION; SUBSTITUTION SO - Radiation Physics and Chemistry 2002 ;63(3-6):661-663 4705 UI - 10279 AU - Albarran JL AU - Aguilar A AU - Martinez L AU - Lopez HF AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Wisconsin, Dept Mat, Milwaukee, WI 53201, USAAlbarran, JL, UNAM, Ctr Ciencias Fis, POB 48-3, Cuernavaca 62251, Morelos, Mexico TI - Corrosion and cracking behavior in an API X-80 steel exposed to sour gas environments AB - In this work, self-loaded linear elastic fracture mechanics (modified wedge opening loading, M-WOL) specimens were used to investigate the stress sulfide cracking (SSC) susceptibility of a microalloyed API X-80 pipeline steel. For this purpose, M-WOL specimens were exposed to hydrogen sulfide (H2S)-saturated NACE solutions at room temperature under applied stress intensity values, K-I, from 35 MPam(1/2) to 50 MPam(1/2). Under all the applied K-I values, crack growth was exhibited, but the propagation rates were relatively slow (<10(-7) m/s). In both orientations, crack propagation was predominantly transgranular across ferrite grains. Apparently, myriads of minute cracks developed at the crack tip plastic zone, which, in turn, gave rise to the growth of a main crack. Crack growth in the rolling direction (transverse-longitudinal [T-L]) was slightly higher than in the transverse direction (L- T). Seemingly, the presence of a banded structure containing pearlite forced the development of a discontinuous path in the transverse direction stowing down crack growth. A threshold stress intensity factor, K-ISSC, of 28 MPam(1/2) was found experimentally, which suggests that under the applied KI values the steel is susceptible to SSC, even though the steel hardness is 13 HRC (i.e., meets NACE standards for applications in sour gases). In the X-80 steel, the rates of crack growth can be directly related to the rates of metal dissolution. Apparently, the conditions that promote crack growth from the crack tip plastic zone are strongly influenced by the rate of hydrogen released through the metal dissolution reaction. Also, additions of 5% sodium chloride (NaCl) to the NACE solution further exacerbate crack growth as dissolution from the crack tip is enhanced MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000178088200009 L2 - corrosion resistance;fracture mechanics;hydrogen-induced cracking;hydrogen sulfide cracking test;sulfide stress cracking;HYDROGEN; RESISTANCE; STRAIN SO - Corrosion 2002 ;58(9):783-792 4706 UI - 10994 AU - Albinati A AU - Bakhmutov VI AU - Belkova NV AU - Bianchini C AU - de los Rios I AU - Epstein L AU - Gutsul EI AU - Marvelli L AU - Peruzzini M AU - Rossi R AU - Shubina E AU - Vorontsov EV AU - Zanobini F AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Milan, Ist Chim Farmaceut & Tossicol, Milan, ItalyAN Nesmeyanov Organoelement Cpds Inst, Moscow 117813, RussiaICCOM, CNR, I-60132 Florence, ItalyUniv Ferrara, Dipartimento Chim, I-44100 Ferrara, ItalyBakhmutov, VI, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Synthesis, characterization, and interconversion of the rhenium polyhydrides [ReH3(eta(4)-NP3)] and [ReH4(eta(4)-NP3)](+) {NP3 = tris[2-(diphenylphosphanyl)-ethyl]amine} AB - The rhenium(III) dichloride complex [ReCl2(eta(4)-NP3)]Cl (1) was prepared from [ReCl3(CH3CN)(PPh3)(2)] by treatment with the tripodal tetradentate ligand N(CH2CH2PPh2)(3) (NP3) in ethanol. The reaction of 1 with LiAlH4 in THF gave the rhenium(III) trihydride [ReH3(eta(4)-NP3)] (2), which was converted into the rhenium(V) tetralrydride [ReH4(eta(4)-NP3)]BPh4 (3) by protonation in CH2Cl2 with HBF4.OMe2, followed by a metathetical reaction with NaBPh4. The classical polyhydride nature of 2 and 3, as well as the overall molecular structures in solution, were determined by NMR spectroscopy, H-1 NMR relaxation, and IR spectroscopy. The polyhydride complexes 2 and 3 are stereochemically nonrigid in solution, and the thermodynamic parameters associated with the fluxional processes were determined by variable-temperature NMR studies. A single-crystal X-ray analysis of 3 has shown the complex cation [ReH4(eta(4)-NP3)](+) to be eight-coordinated by the four donor atoms of NP3 and by four terminal hydride ligands in a distorted dodecahedral geometry. An in situ IR study in CH2Cl2 has shown that the protonation of 3 occurs regioselectively at the metal center with no formation of a dihydrogen complex. Kinetic hydrogen bond products of the formula [(eta(4)-NP3)H3Re...HOR] (ROH C2H5OH, CFH2CH2OH, CF3CH2OH) were intercepted by IR spectroscopy at low temperature. The thermodynamic parameters associated with the formation of the hydrogen bond adducts were determined by either IR spectroscopy applying the logansen equation or van't Hoff plots of the formation constant vs. temperature MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000175988500032 L2 - rhenium;tripodal ligands;phosphanes;hydride ligands;TRANSITION-METAL COMPLEXES; IN-SITU IR; PROTON-TRANSFER; HYDRIDE COMPLEXES; DIHYDROGEN COMPLEXES; STRUCTURAL CHARACTERIZATION; POLYPHOSPHINE LIGANDS; HYDROGEN; NMR; RADIOPHARMACEUTICALS SO - European Journal of Inorganic Chemistry 2002 ;(6):1530-1539 4707 UI - 10019 AU - Alcubierre M AU - Guzman FS AU - Matos T AU - Nunez D AU - Urena-Lopez LA AU - Wiederhold P AD - Max Planck Inst Gravitat Phys, D-14476 Golm, GermanyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Automat Control, Mexico City 07000, DF, MexicoPenn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandAlcubierre, M, Max Planck Inst Gravitat Phys, Muhlenberg 1, D-14476 Golm, Germany TI - Galactic collapse of scalar field dark matter AB - We present a scenario for core galaxy formation based on the hypothesis of scalar field dark matter. We interpret galaxy formation through the collapse of a scalar field fluctuation. We find that a cosh potential for the self-interaction of the scalar field provides a reasonable scenario for the formation of a galactic core plus a remnant halo, which is in agreement with cosmological observations and phenomenological studies in galaxies MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000178755400014 L2 - SURFACE BRIGHTNESS GALAXIES; TIME PHASE-TRANSITION; BLACK-HOLE; DENSITY PROFILES; BOSON STARS; MASS; HALO; QUINTESSENCE; LIQUID SO - Classical and Quantum Gravity 2002 ;19(19):5017-5024 4708 UI - 10249 AU - Alexandrova L AU - Cabrera A AU - Hernandez MA AU - Cruz MJ AU - Abadie MJM AU - Manero O AU - Likhatchev D AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Montpellier 2, LEMP, MAO, F-34095 Montpellier, FranceLikhatchev, D, Natl Autonomous Univ Mexico, Inst Invest Mat, AP 70-360, Mexico City 04510, DF, Mexico TI - Transesterification in poly(ethylene terephthalate) and poly(ethylene naphthalate 2,6-dicarboxylate) blends: model compounds study AB - Kinetics of transesterification reaction in poly(ethylene terephthalate)-poly(ethylene naphthalate 2,6-dicarboxylate), PET-PEN, blends resulting from melt processing was simulated using model compounds of ethylene dibenzoate (BEB) and ethylene dinaphthoate (NEN). The exchange reaction between BEB and NEN was followed by H-1 NMR spectroscopy using signals from the aliphatic protons of ethylene glycol moieties at 4.66 and 4.78 ppm, respectively. The first-order kinetics was established under pseudo-first-order conditions for both reactants. Thus, the overall transesterification reaction was second order reversible. The reversibility was confirmed experimentally by heating a mixed sequence of 1-benzoate 2-naphthoate ethylene (BEN) under similar conditions. Both forward reaction of the equimolar amounts of the reagents and reverse reaction came to equilibrium at the same molar ratio of the reactants and reaction products of roughly 0.25:0.50:0.25 for BEB, BEN, and NEN, respectively. The rate equation for the transesterification reaction in the model system was modified using half-concentration of BEN, which is the only effective in the intermolecular exchange. Direct ester-ester exchange was deduced as a prevailing,mechanism for the transesterification reaction under the conditions studied, and the values of equilibrium and rate constants, as well as other basic thermodynamic and kinetic parameters were determined. The use of Zn(OAc)(2) as a catalyst resulted in a significant decrease in the activation enthalpy of transesterification, which might be due to the partial switch of the reaction mechanism from primarily pseudo-homolytic to more heterolytic where Zn-II acts as a Lewis base which binds to the ester carbonyl oxygen. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000177976900004 L2 - poly(ethylene terephthalate)/poly(ethylene naphthalate 2,6-dicarboxylate);transesterification;blending;POLY(ETHYLENE-TEREPHTHALATE) BLENDS; 2,6-NAPHTHALATE); MISCIBILITY; KINETICS SO - Polymer 2002 ;43(20):5397-5403 4709 UI - 9382 AU - Alfaro J AU - Morales-Tecotl HA AU - Urrutia LF AD - Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, ChilePenn State Univ, Ctr Gravitat Phys, University Pk, PA 16802, USAPenn State Univ, Dept Phys, University Pk, PA 16802, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoAlfaro, J, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 22, Chile TI - Quantum gravity and spin-1/2 particle effective dynamics AB - Quantum gravity phenomenology opens up the possibility of probing Planck scale physics. Thus, by exploiting the generic properties that a semiclassical state of the compound system fermions plus gravity should have, an effective dynamics of spin-1/2 particles is obtained within the framework of loop quantum gravity. Namely, at length scales much larger than Planck length l(P)similar to10(-33) cm and below the wavelength of the fermion, the spin-1/2 dynamics in flat spacetime includes Planck scale corrections. In particular we obtain modified dispersion relations in vacuo for fermions. These corrections yield a time of arrival delay of the spin-1/2 particles with respect to a light signal and, in the case of neutrinos, a novel flavor oscillation. To detect these effects the corresponding particles must be highly energetic and should travel long distances. Hence neutrino bursts accompanying gamma ray bursts or ultrahigh energy cosmic rays could be considered. Remarkably, future neutrino telescopes may be capable of testing such effects. This paper provides a detailed account of the calculations and elaborates on results previously reported in a Letter. These are further amended by introducing a real parameter Y aimed at encoding our lack of knowledge of scaling properties of the gravitational degrees of freedom MH - Chile MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 40 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Review AV - English IS - 0556-2821 UR - ISI:000180317800034 L2 - GAMMA-RAY BURST; PATH-INTEGRAL DUALITY; GAUGE FIELD-THEORY; COHERENT STATES GCS; BLACK-HOLE ENTROPY; SPACE-TIME; ASHTEKAR VARIABLES; REALITY CONDITIONS; EQUIVALENCE PRINCIPLE; NEUTRINO OSCILLATIONS SO - Physical Review D 2002 ;66(12): 4710 UI - 11056 AU - Alfaro J AU - Morales-Tecotl HA AU - Urrutia LF AD - Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, ChilePenn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, Davey Lab 104, University Pk, PA 16802, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoAlfaro, J, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 22, Chile TI - Loop quantum gravity and light propagation AB - Within loop quantum gravity we construct a coarse-grained approximation for the Einstein-Maxwell theory that yields effective Maxwell equations in flat spacetime comprising Planck scale corrections. The corresponding Hamiltonian is defined as the expectation value of the electromagnetic term in the Einstein-Maxwell Hamiltonian constraint, regularized in the manner of Thiemann, with respect to a would-be semiclassical state. The resulting energy dispersion relations entail Planck scale corrections to those in flat spacetime. Both the helicity dependent contribution of Gambini and Pullin and, for a value of a parameter of our approximation, that of Ellis and co-workers are recovered. The electric-magnetic asymmetry in the regularization procedure yields nonlinearities only in the magnetic sector which are briefly discussed. Observations of cosmological gamma ray bursts might eventually lead to the needed accuracy to study some of these quantum gravity effects MH - Chile MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 89 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000175774200019 L2 - GAMMA-RAY BURST; GAUGE FIELD-THEORY; COHERENT STATES GCS; BLACK-HOLE ENTROPY; SPIN DYNAMICS QSD; ASHTEKAR VARIABLES; REALITY CONDITIONS; ENERGY NEUTRINOS; WEAVE STATES; SCALAR FIELD SO - Physical Review D 2002 ;65(10): 4711 UI - 10286 AU - Alfaro JC AU - Petrone VM AU - Fehervari T AU - Nava G AU - Kogut M AU - Nisbet D AU - Tellez G AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Prod Anim Aves, Mexico City 04510, DF, MexicoARS, USDA, Food Anim Protect Res Lab, College Stn, TX 77845, USAPetrone, VM, Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Prod Anim Aves, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Resistance to velogenic Newcastle disease virus in leghorn chickens by use of prophylactic lymphokines AB - A group of 1-day-old commercial leghorn chickens was prophylactically treated with lymphokines obtained from lymphocyte cultures of chickens previously infected with Salmonella enteritidis (S. enteritidis-immune lymphokines [SE-ILK]) with the objective to investigate the effect of SE-ILK on development of Newcastle disease (ND) infection caused by Chimalguacan strain, a Mexican velogenic ND virus (vNDV). Clinical signs, histologic lesions, and hemagglutination-inhibition (HI) serum titers were compared with four other groups, namely, chickens without SE-ILK treatment with virus challenge; with SE-ILK without virus challenge; with nonimmune lymphokine (NILK) treatment and virus challenge; with lymphokine treatment and no virus challenge. SE-ILK was administered intraperitoneally in a dose of 0.5 ml/chicken and was followed 30 min later with the challenge of vNDV in a dose of 10(7.6) 50% embryo lethal dose/ml per bird. Birds were observed during 21 days of postchallenge. Detection of histologic changes and virus isolation procedures were carried out on the third, seventh, 14th, and 21st postinoculation days. HI tests were performed first before treatment and later on the days of histologic sample collection except on the third postinoculation day. Results showed that SE-ILK administration conferred resistance to the chickens because: 1) it significantly diminished the severity of ND infection by inhibiting appearance of clinical signs (P<0.001), lesions (P<0.005), and histopathologic changes (P<0.005); 2) it decreased vNDV isolation rate from the organs (P<0.001), and 3) it potentialized and even accelerated (P<0.005) primary immune response by antibodies in the presence of vNDV MH - Mexico|Distrito Federal MH - USA PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000178063100002 L2 - interaction lymphokines;velogenic Newcastle disease virus;challenge resistance of infection;chicken;EIMERIA-TENELLA; INTERFERON; CYTOKINES; INVASION SO - Avian Diseases 2002 ;46(3):525-534 4712 UI - 10856 AU - Alfonsin JLR AU - Romero D AD - Univ Bonn, Forschunginst Diskrete Math, D-53113 Bonn, GermanyUNAM, Inst Matemat, Cuernavaca, Morelos, MexicoAlfonsin, JLR, Univ Bonn, Forschunginst Diskrete Math, Lennestr 2, D-53113 Bonn, Germany TI - Embeddability of the combinohedron AB - Let e(1), ..., e(m) be m different symbols, let r(1) greater than or equal to (...) greater than or equal to r(m) be positive integers, and let n = Sigma(i=1)(m) r(i). The combinohedron, denoted by C(r(1), ..., r(m)), is the loopless graph whose vertices are the n-tuples in which the symbol e(i) appears exactly r(i) times, and where an edge joins two vertices if and only if one can be transformed into the other by interchanging two adjacent entries. The graph known as permutohedron is a particular case of the combinohedron. Here, we extend to the combinohedron some results on embeddability of the permutohedron. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000176452200030 L2 - combinohedron;permutohedron;multinomial lattice;cubic lattice;root lattice;embeddings;LATTICES; ORDER SO - Discrete Mathematics 2002 ;254(1-3):473-483 4713 UI - 9759 AU - Alias FM AU - Daff PJ AU - Paneque M AU - Poveda ML AU - Carmona E AU - Perez PJ AU - Salazar V AU - Alvarado Y AU - Atencio R AU - Sanchez-Delgado R AD - Univ Sevilla, CSIC, Dept Quim Inorgan, Inst Invest Quim, Seville 41092, SpainUniv Huelva, Dept Quim Inorgan & Ciencia Mat, Palos De La Frontera, Huelva, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca, Hidalgo, MexicoInst Venezolano Invest Cient, Caracas 1020A, VenezuelaPoveda, ML, Univ Sevilla, CSIC, Dept Quim Inorgan, Inst Invest Quim, Av Amer Vespucio S-N, Seville 41092, Spain TI - C-C bond-forming reactions of Ir-III-alkenyls and nitriles or aldehydes: Generation of reactive hydride- and alkyl-alkylidene compounds and observation of a reversible 1,2-H shift in stable hydride-Ir-III alkylidene complexes AB - Nucleophilic attack of the carbon of an Ir-III-alkenyl functionality onto the alpha-carbon of a coordinated nitrile- or aldehyde occurs intramoleculary to yield initially iridacyclic structures. Nitriles give rise to isolable complexes that contain delocalized five-membered rings (iridapyrroles, e.g. 3'-8') in a reaction catalyzed by H2O (for some of these syntheses, Ir-III-eta(3)-allyl derivatives may be used as the source of the Ir-III-alkenyl moiety). In contrast, the alkenyl-to-aldehyde C-C coupling gives transient iridacycles that evolve by a fast, alkyl-to-alkylidene migration and beta-H elimination. The end products (13* and 14*) contain an elaborated chelating alkoxide-olefin ligand. Addition of [H(OEt2)(2)][BAr'(4)] to the iridapyrroles effects stereospecific protonation of the beta-ring carbon. Those iridapyrroles which contain an additional metal-alkyl functionality (e.g. 3a*, alkyl = C2H5) afford highly reactive cationic alkyl-alkylidene intermediates that evolve instantaneously by migratory insertion/beta-H elimination. The end products also contain an elaborated, chelating ligand, although this time with an olefin and imine terminus compared with the previous ligand. Contrary to this result, protonation of the hydride-iridapyrrole complex 8a* in weakly coordinating solvents permits isolation of two unusual cationic cis-hydride-alkylidene compounds 11*, which undergo reversible 1,2-H shifts MH - Mexico|Hidalgo MH - Spain MH - Venezuela PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Multidisciplinary U5 - J;Review AV - English IS - 0947-6539 UR - ISI:000179437700010 L2 - aldehydes;C-H activation;carbene ligands;C-C coupling;iridium;BETA-MIGRATORY INSERTION; CYCLO-ADDITION REACTIONS; IRIDIUM-PHOSPHINE CHEMISTRY; PI-ALLYL COMPLEXES; R = H; CARBENE COMPLEXES; ORGANIC-SYNTHESIS; AMIDE COMPLEXES; <(ME3SINCH2CH2)(3)N>(3-) LIGAND; HOMOGENEOUS CATALYSIS SO - Chemistry-A European Journal 2002 ;8(22):5132-5146 4714 UI - 11256 AU - Allan RA AU - Wang Q AU - Jimenez-Perez A AU - Davis LK AD - Massey Univ, Inst Nat Resources, Palmerston North, New ZealandIPN, Ceprobi, Yautepec 62730, Morelos, MexicoWang, Q, Massey Univ, Inst Nat Resources, Private Bag 11 222, Palmerston North, New Zealand TI - Wiseana copularis larvae (Hepialidae : Lepidoptera): laboratory rearing procedures and effect of temperature on survival AB - Wiseana larvae are a serious pest of pasture in New Zealand but can be difficult to rear in the laboratory for research purposes. A method is described whereby field-collected larvae were successfully raised to adults. Larvae were reared individually at 5, 10, 15, and 20degreesC in petri dishes containing moistened bark and were fed with a semi-synthetic diet based on white clover and carrot. Survival to both pupation and adulthood was greatest at 15degreesC, at which about 46% of field-collected larvae pupated and 39% developed to adults MH - Mexico|Morelos MH - New Zealand PB - WELLINGTON: SIR PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0028-8233 UR - ISI:000175314600008 L2 - Hepialidae;Wiseana copularis;rearing;artificial diet SO - New Zealand Journal of Agricultural Research 2002 ;45(1):71-75 4715 UI - 9866 AU - Allnutt TF AU - Wettengel WW AU - Reyna JV AU - Garcia RCD AU - Elias EEI AU - Olson DM AD - World Wildlife Fund, Conservat Sci Program, Washington, DC 20037, USAUniv Autonoma Agraria Antonio, Dept Bot, Saltillo 25315, Coahuila, MexicoAllnutt, TF, World Wildlife Fund, Conservat Sci Program, 1250 24th St NW, Washington, DC 20037 USA TI - The efficacy of TM satellite imagery for rapid assessment of Chihuahuan xeric habitat intactness for ecoregion-scale conservation planning AB - A critical step in designing effective conservation landscapes is the identification of relatively intact natural habitats. Satellite remote sensing has been effectively used to distinguish relatively intact and degraded forests at a number of scales. However, the utility of remote sensing data for rapid and cost-effective assessments of habitat intactness across large and regions has not been adequately tested. To this end, we tested the ability of TM imagery to rapidly discriminate different levels of habitat degradation across large regions of the Chihuahuan Desert. We were able to identify relatively intact habitat in many cases. However, degraded habitat was often misidentified as relatively intact. The use of both mid- and late-season imagery provides some improvement by highlighting phenological differences among the intactness classes. Overall, low vegetation cover and inter- and intra-seasonal variability diminish the utility of TM imagery for large-scale conservation planning in the Chihuahuan Desert. (C) 2002 Published by Elsevier Science Ltd MH - USA MH - Mexico|Coahuila PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000179091400010 L2 - conservation planning;remote sensing;habitat intactness;Chihuahuan Desert;ENDANGERED CACTI; VEGETATION; DESERT; CLASSIFICATION; PATTERNS; COVER SO - Journal of Arid Environments 2002 ;52(1):135-153 4716 UI - 10371 AU - Allub R AU - Navarro O AU - Avignon M AU - Alascio B AD - Ctr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Grenoble 1, CNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, FranceUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAllub, R, Ctr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina TI - Effect of disorder on the electronic structure of the double perovskite Sr2FeMoO6 AB - Recently, Sr2FeMoO6 has been established as a new colossal magnetoresistance material with substantial low-field magnetoresistance at room temperature and has attracted much attention in the double perovskite family. This material always appears with a certain degree of miss-site disorder where Fe and Mo interchange their positions. Using renormalized perturbation expansion, we calculate the density of states and determine the variation of the critical temperature in the low disorder regime. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000177607700005 L2 - Sr2FeMoO6;double perovskites;MAGNETORESISTANCE; OXIDE SO - Physica B-Condensed Matter 2002 ;320(1-4):13-17 4717 UI - 9535 AU - Almaini O AU - Scott SE AU - Dunlop JS AU - Manners JC AU - Willott CJ AU - Lawrence A AU - Ivison RJ AU - Johnson O AU - Blain AW AU - Peacock JA AU - Oliver SJ AU - Fox MJ AU - Mann RG AU - Perez-Fournon I AU - Gonzalez-Solares E AU - Rowan-Robinson M AU - Serjeant S AU - Cabrera-Guerra F AU - Hughes DH AD - Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandRoyal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Sussex, CPES, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandInst Astrofis Canarias, Tenerife 38200, SpainUniv Kent, Sch Phys Sci, Unit Space Sci & Astrophys, Canterbury CT2 7NZ, Kent, EnglandINAOE, Puebla 72000, MexicoAlmaini, O, Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - The coincidence and angular clustering of Chandra and SCUBA sources AB - We explore the relationship between the hard X-ray and submillimetre populations using deep Chandra observations of a large, contiguous SCUBA survey. In agreement with other recent findings, we confirm that the direct overlap is small. Of the 17 submillimetre sources detected in this field at 850 mum, only one is coincident with a Chandra source. The resulting limits imply that the majority of SCUBA sources are not powered by acive galactic nuclei (AGN), unless the central engine is obscured by Compton-thick material with a low (<1 per cent) scattered component. Furthermore, since Chandra detects only similar to 5 per cent of SCUBA sources, the typical obscuration would need to be almost isotropic. The X-ray upper limits are so strong that in most cases we can also rule out a starburst spectral energy distribution at low redshift, suggesting that the majority of SCUBA sources lie at z > 1, even if they are purely starburst galaxies. Despite the low detection rate, we find evidence for strong angular clustering between the X-ray and submillimetre populations. The implication is that AGN and SCUBA sources trace the same large-scale structure but do not generally coincide. If bright submillimetre sources represent massive elliptical galaxies in formation, we suggest that (for a given galaxy) the major episode of star formation must be distinct from the period of observable quasar activity MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000179945500003 L2 - galaxies : active;galaxies : evolution;galaxies : formation;galaxies : starburst;X-rays : general;submillimetre;DEEP FIELD-NORTH; SPECTRAL ENERGY-DISTRIBUTION; GALAXY REDSHIFT SURVEY; X-RAY; STAR-FORMATION; SUBMILLIMETER SURVEY; INFRARED GALAXIES; SCUBA-8-MJY SURVEY; GALACTIC NUCLEI; BLACK-HOLES SO - Monthly Notices of the Royal Astronomical Society 2002 ;338(2):303-311 4718 UI - 9797 AU - Almodovar NS AU - Font R AU - Portelles J AU - Raymond O AU - Siqueiros JM AD - Univ La Habana, Fac Fis, IMRE, Havana 10400, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoAlmodovar, NS, Univ La Habana, Fac Fis, IMRE, Havana 10400, Cuba TI - Phase formation and characterization of [Fe, Mg]NbO4 as a new precursor for the PMN-PFN system AB - An X-ray diffraction (XRD) and scanning electron microscopy (SEM) study of the phase composition and microstructure characteristics of the Mg(1-x)/3Nb(4-x)/6Fex/2O2 (x=0.5) chemical compound is presented. The samples were prepared by the conventional ceramic method and subjected to different heat treatments. Columbite (MgNb2O6) and iron niobium oxide (FeNbO4, Wolframite) were identified as intermediate compounds in the reaction. A new single phase precursor for the (1-x)Pb(Mg1/3Nb2/3)O-3-xPb(Fe1/2Nb1/2)O-3 (PMN-PFN) system identified as [Fe, Mg]NbO4, was obtained, isostructural with the FeNbO4 where Fe and Mg ions occupy the same crystal site (space group P1 21a 1). From the Rietveld refinement method the cell parameters of the monoclinic structure were determined. The microstructure analysis indicates that the particles are irregular in shape and the grain size tends to increase with the calcination temperature. (C) 2002 Kluwer Academic Publishers MH - Cuba MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000179201600017 L2 - LEAD MAGNESIUM NIOBATE; DIELECTRIC-PROPERTIES; SINTERING CONDITIONS; IRON NIOBATE; CERAMICS; MICROSTRUCTURE; FABRICATION; RELAXORS; ROUTE SO - Journal of Materials Science 2002 ;37(23):5089-5093 4719 UI - 11184 AU - Alonso CF AU - Hernandez MP AU - Casielles E AU - Pena JL AD - Univ La Habana, Fac Fis, Havana 10400, CubaIPN, CICATA Altamira, Puerto Ind Altamira, Tamps 89600, MexicoUniv La Habana, Inst Mat & React, Havana 10400, CubaAlonso, CF, Univ La Habana, Fac Fis, San Lazaro & L,Vedado Plaza, Havana 10400, Cuba TI - Determination of the barrier-height fluctuations based on the parallel-noninteracting diode model AB - A model is proposed to determine the barrier height fluctuations of the inhomogeneous Schottky junction from the experimental current-voltage (I-V) characteristics. This model is based on noninteracting parallel diodes. In it, the current of each diode responds to a general expression of the thermionic theory where the Schottky effect and the series resistance are enclosed. The barrier height fluctuations are an effective-area barrier-height distribution which is defined as the probability of occurrence of the barrier height for each diode. The model is applied to the experimental I-V curves reported by I. M. Dharmadasa , Solid-State Electronics 42, 595 (1998). (C) 2002 American Institute of Physics MH - Cuba MH - Mexico|Tamaulipas PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000175564100029 L2 - ELECTRON-EMISSION MICROSCOPY; INHOMOGENEOUS SCHOTTKY BARRIERS; TRANSPORT; INTERFACES; CONTACTS SO - Applied Physics Letters 2002 ;80(20):3751-3753 4720 UI - 10942 AU - Alonso G AU - Berhault G AU - Aguilar A AU - Collins V AU - Ornelas C AU - Fuentes S AU - Chianelli RR AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, MexicoUniv Texas, Mat Res Technol Inst, El Paso, TX 79968, USAUniv Poitiers, Catalyse Chim Organ Lab, CNRS, UMR 6503, F-86022 Poitiers, FranceUNAM, Ctr Ciencias Mat Condensada, Dept Catalisis, Ensenada 22830, Baja California, MexicoAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, Mexico TI - Characterization and HDS activity of mesoporous MoS2 catalysts prepared by in situ activation of tetraalkylammonium thiomolybdates AB - Unsupported molybdenum disulfide catalysts with unique morphological pore structure were synthesized from tetraalkylammonium thiometalates precursors by in situ activation during the hydrodesulfurization (HDS) of dibenzothiophene. The precursors used in this study are ammonium thiomolybdate (ATM), tetrapropylammonium thiomolybdate, tetrapentylammonium thiomolybdate, tetrahexylammonium thiomolybdate, tetraheptylammonium thiomolybdate (THepATM), and tetraoctylammonium thiomolybdate. The thermogravimetrical analysis carried out under nitrogen demonstrated that all precursors yield MoS2 bulk structure at 623 K, after one or two decomposition steps. The morphology of these catalysts observed by scanning electron microscopy presents large hemispherical or ovoid cavities with a cheese-like porous arrangement, high surface area (from 255 up to 329 m(2)/g), high content of carbon (C/Mo = 2.7-4.0), and type IV adsorption-desorption isotherms of nitrogen. The nature of the alkyl group affects the surface area, the pore size distribution, and the HDS selectivity. The highest selectivity for direct C-S bond cleavage is observed for the molybdenum disulfide catalyst formed from THepATM. X-ray diffraction studies showed that the catalysts are poorly crystallized, with a very weak intensity of the (002) line of 2H-MoS2 characteristic of exfoliated samples. (C) 2002 Elsevier Science (USA) MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 39 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000176073900012 L2 - MoS2;thiosalts;in situ activation;mesoporous;hydrodesulfurization;MOLYBDENUM CARBIDE; SULFIDE CATALYSTS; WS2 CATALYSTS; HYDRODESULFURIZATION; DECOMPOSITION; AMMONIUM; THIOTUNGSTATES; MODEL; HYDROGENATION; NITRIDE SO - Journal of Catalysis 2002 ;208(2):359-369 4721 UI - 11155 AU - Alonso G AU - Adams ML AD - Texas A&M Univ, College Stn, TX 77843, USACtr Nucl Mexico, Inst Nacl Invest Nucl, Salazar 52245, MexicoAlonso, G, Texas A&M Univ, College Stn, TX 77843, USA TI - A mixed-oxide assembly design for rapid disposition of weapons plutonium in pressurized water reactors AB - We have created a new mixed-oxide (MOX) fuel assembly design for standard pressurized water reactors (PWRs). Design goals were to maximize the plutonium throughput while introducing the lowest perturbation possible to the control and safety systems of the reactor. Our assembly design, which we call MIX-33, offers some advantages for the disposition of weapons-grade plutonium; it increases the disposition rate by 8% while increasing the worth of control material, compared to a previous Westing-house design. The MIX-33 design is based upon two ideas: the use of both uranium and plutonium fuel pins in the same assembly, and the addition of water holes in the assembly. The main result of this paper is that both of these ideas are effective at increasing Pu throughput and increasing the worth of control material. With this new design, according to our analyses, we can transition smoothly from a full low-enriched-uranium (LEU) core to a full MIX-33 core while meeting the operational and safety requirements of a standard PWR. Given an interruption of the MOX supply, we can transition smoothly back to full LEU while meeting safety margins and using standard LEU assemblies with uniform pinwise enrichment distribution. If the MOX supply is interrupted for only one cycle, the transition back to a full MIX-33 core is not as smooth; high peaking could cause power to be derated by a few percent for a few weeks at the beginning of one transition cycle MH - Mexico|Estado De Mexico MH - USA PB - LA GRANGE PK: AMER NUCLEAR SOCIETY RP - NOT IN FILE U3 - TC 1 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0029-5639 UR - ISI:000175550500003 SO - Nuclear Science and Engineering 2002 ;141(2):111-128 4722 UI - 9690 AU - Alonso MA AU - Pogosyan GS AU - Wolf KB AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoYerevan State Univ, Int Ctr Adv Studies, Yerevan 375049, ArmeniaJoint Nucl Res Inst, Theoret Phys Lab, Dubna 141980, RussiaAlonso, MA, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Wigner functions for curved spaces. I. On hyperboloids AB - We propose a Wigner quasiprobability distribution function for Hamiltonian systems in spaces of constant curvature, in this article on hyperboloids, which returns the correct marginals and has the covariance of the Shapiro functions under SO(D,1) transformations. To the free systems obeying the Laplace-Beltrami equation on the hyperboloid, we add a conic-oscillator potential in the hyperbolic coordinate. As an example, we analyze the one-dimensional case on a hyperbola branch, where this conic-oscillator is the Poschl-Teller potential. We present the analytical solutions and plot the computed results. The standard theory of quantum oscillators is regained in the contraction limit to the space of zero curvature. (C) 2002 American Institute of Physics MH - Armenia MH - Mexico|Morelos MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000179483200001 L2 - PHASE-SPACE; DYNAMICAL SYMMETRIES; SPHERICAL GEOMETRY; LIE-ALGEBRAS; WAVE-FIELDS; ABERRATION; SCATTERING; SYSTEMS SO - Journal of Mathematical Physics 2002 ;43(12):5857-5871 4723 UI - 10426 AU - Alonso MA AU - Forbes GW AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62260, Morelos, MexicoQED Technol, Rochester, NY 14607, USAAlonso, MA, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62260, Morelos, Mexico TI - Stable aggregates of flexible elements give a stronger link between rays and waves AB - A recently proposed ray-based method for wave propagation is used to provide a meaningful criterion for the validity of rays in wave theory. This method assigns a Gaussian contribution to each ray in order to estimate the field. Such contributions are inherently flexible. By means of a simple example, it is shown that superior field estimates can result when the contributions are no longer forced to evolve like parabasal beamlets. (C) 2002 Optical Society of America MH - Mexico|Morelos MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000177417300003 L2 - GAUSSIAN BEAMS; FIELDS; MEDIA SO - Optics Express 2002 ;10(16):728-739 4724 UI - 9356 AU - Alpay D AU - Shapiro M AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelInst Politecn Nacl, Escuela Super Fis & Math, Dept Matemat, Mexico City 07300, DF, MexicoAlpay, D, Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, Israel TI - Gleason's problem and interpolation for hyperholomorphic functions AB - We prove a Gleason type theorem in the setting of functions hyperholomorphic in the unit ball of R-n. We give an interpretation of the result in terms of pairs of functions defined in the unit ball of C-2. Finally we use the theorem to study the homogeneous interpolation problem in the setting of hyperholomorphic functions MH - Israel MH - Mexico|Distrito Federal PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000180493100007 SO - Comptes Rendus Mathematique 2002 ;335(11):889-894 4725 UI - 10534 AU - Alvarez J AU - Guzman-Partida M AD - New Mexico State Univ, Dept Math, Las Cruces, NM 88003, USAUniv Sonora, Dept Matemat, Hermosillo 83000, Sonora, MexicoAlvarez, J, New Mexico State Univ, Dept Math, Las Cruces, NM 88003, USA TI - The S '-convolution with singular kernels in the Euclidean case and the product domain case AB - We characterize those tempered distributions which are S'-convolvable with a given class of singular convolution kernels. We study both, the Euclidean case and the product domain case. In the Euclidean case, we consider a class of kernels that includes Riesz kernels, Calderon-Zygmund singular convolution kernels, finite part distributions defined by hypersingular convolution kernels, and Hormander multipliers. In the product domain case, we consider a class of singular kernels introduced by Fefferman and Stein as a generalization of the n-dimensional Hilbert kernel. (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Sonora MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000177167300009 L2 - S '-convolution;weighted spaces of distributions;singular convolution kernels;SPACES SO - Journal of Mathematical Analysis and Applications 2002 ;270(2):405-434 4726 UI - 10646 AU - Alvarez LG AU - Jones SE AD - CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoSch Ocean Sci, Marine Sci Labs, Menai Bridge LL59 5EY, Gwynedd, WalesAlvarez, LG, CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, Mexico TI - Factors influencing suspended sediment flux in the Upper Gulf of California AB - Few studies exist of sediment dynamics in inverse estuaries, which are characterized by hypersaline water bodies and associated gravity currents and arise in and regions where little precipitation and runoff combine with a high evaporation. Observations of velocity, density and suspended sediment concentration profiles have been made using an acoustic Doppler current profiler, CTD, optical backscatter sensors and water sampling at a shallow water site in the Upper Gulf of California over a spring to neap tidal cycle. These revealed contrasting dynamic conditions in which gravity current events produced significant net near-bed suspended sediment fluxes of 2.5 g m(-2) s(-1) out of the Gulf during neap tides. Instantaneous suspended sediment fluxes exceeded 30 g m(-2) s(-1) during spring tides due to tidal resuspension, but net fluxes were near zero. The baroclinic gravity current is shown to be the dominant mechanism for net flux of suspended sediment toward deeper waters, at least during quiescent summer conditions. This flux is proposed to be confined within a wide, western along-Gulf channel. This is consistent with evidence that the Colorado River delta system is exporting sediments to deeper water after becoming unstable due to switching off of river discharge since 1930. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - United Kingdom PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000176947700009 L2 - suspended matter;sediment flux;inverse estuaries;gravity currents;Gulf of California;COLORADO RIVER DELTA; OF-CALIFORNIA; GRAVITY CURRENTS; STRATIFICATION SO - Estuarine Coastal and Shelf Science 2002 ;54(4):747-759 4727 UI - 9309 AU - Alvarez MM AU - Arratia PE AU - Muzzio FJ AD - Inst Tecnol & Estudios Super Monterrey, Ctr Biotecnol, Monterrey 64849, Nuevo Leon, MexicoRutgers State Univ, Dept Chem & Biochem Engn, Piscataway, NJ 08854, USAAlvarez, MM, Inst Tecnol & Estudios Super Monterrey, Ctr Biotecnol, Ave Eugenio Garza Sada 2501 Sur CEDES 6to Piso, Monterrey 64849, Nuevo Leon, Mexico TI - Laminar mixing in eccentric stirred tank systems AB - Laminar flow structure and mixing patterns in stirred tanks with eccentrically located impellers is examined using tracer visualization techniques and laser induced fluorescence (LIF). The displacement of the shaft from the centerline of the tank has a remarkable effect on the manifold structure of the flow: segregated regions of regular motion observed in concentric systems are destroyed, impeller mid-plane separatrices are eliminated, and the axial circulation is greatly improved even in systems agitated even by radial impellers MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon MH - USA PB - OTTAWA: CANADIAN SOC CHEMICAL ENGINEERING RP - NOT IN FILE U3 - TC 16 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0008-4034 UR - ISI:000180720800002 L2 - laminar mixing;eccentricity stirred tanks;global chaos;mixing structures;CHAOTIC FLOWS SO - Canadian Journal of Chemical Engineering 2002 ;80(4):546-557 4728 UI - 10115 AU - Alvarez V AU - Nava M AU - Quiroz Y AU - Chavez M AU - Herrera-Acosta J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - Univ Zulia Hosp, INBIOMED Fundacite, Maracaibo, Zulia, VenezuelaInst Nacl Cardiol I Chavez, Mexico City, DF, MexicoBaylor Coll Med, Houston, TX 77030, USA TI - Hyperuricemia induces salt sensitive hypertension (SSHTA) that may be prevented by reduction of the tubulointerstitial inflammatory infiltrate MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757501622 SO - Journal of the American Society of Nephrology 2002 ;13():328A-329A 4729 UI - 10412 AU - Amin OM AD - Lab Anal Clin, Nogales, Sonora, MexicoParasitol Ctr Inc, Tempe, AZ 85281, USAAmin, OM, POB 28372, Tempe, AZ 85285, USA TI - Seasonal prevalence of intestinal parasites in the United States during 2000 AB - One-third of 5,792 fecal specimens from 2,896 patients in 48 states and the District of Columbia tested positive for intestinal parasites during the year 2000. Multiple infections with 2-4 parasitic species constituted 10% of 916 infected cases. Blastocystis hominis infected 662 patients (23% or 72% of the 916 cases). Its prevalence appears, to be increasing in recent years. Eighteen other species of intestinal parasites were identified. Cryptosporidium parvum and Entamoeba histolytica/E. dispar ranked second and third in prevalence, respectively. Prevalence of infection was lowest (22-27%) in winter, gradually increased during the spring, reached peaks of 36-43% between July and October, and gradually decreased to 32% in December. A new superior method of parasite detection using the Proto-fix(TM)-CONSED(TM) 1 system for fixing, transport, and processing of fecal specimens is described. In single infections, pathogenic protozoa caused asymptomatic subclinical infections in 0-31% of the cases and non-pathogenic protozoa unexpectedly caused symptoms in 73-100% of the cases. The relationship between Charcot-Leyden crystals and infection with four species of intestinal parasites is examined and the list of provoking parasitic causes is expanded MH - Mexico|Sonora MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 12 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000177660700030 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; BLASTOCYSTIS-HOMINIS; RISK-FACTORS; INFECTION; CRYPTOSPORIDIOSIS; DIARRHEA SO - American Journal of Tropical Medicine and Hygiene 2002 ;66(6):799-803 4730 UI - 9650 AU - Amore P AU - Birse MC AU - McGovern JA AU - Walet NR AD - UMIST, Dept Phys, Manchester M60 1QD, Lancs, EnglandUniv Manchester, Dept Phys & Astron, Theoret Phys Grp, Manchester M13 9PL, Lancs, EnglandUniv Colima, Fac Ciencias, Colima 28045, MexicoAmore, P, UMIST, Dept Phys, POB 88, Manchester M60 1QD, Lancs, England TI - Colour superconductivity in finite systems AB - We have studied the effects of finite size on the two flavor colour superconducting state. Since the baryon number in the BCS state is only fixed on average, we have projected the state onto a fixed baryon number. The resulting state has been then projected onto a colour-singlet state, by integrating onto the colour group manifold. The effects of both projections have been evaluated numerically MH - United Kingdom MH - Mexico|Colima PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000179714300018 L2 - quark-gluon plasma;QCD;relativistic quark model;nuclear matter aspects of neutron stars;DENSITY; QCD SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2002 ;16(1-4):163-168 4731 UI - 11379 AU - Amore P AU - Birse MC AU - McGovern JA AU - Walet NR AD - Univ Manchester, Dept Phys & Astron, Theoret Phys Grp, Manchester M13 9PL, Lancs, EnglandUMIST, Dept Phys, Manchester M60 1QD, Lancs, EnglandAmore, P, Univ Colima, Fac Ciencias, Mexico City, DF, Mexico TI - Color superconductivity in finite systems AB - In this paper we study the effect of finite size on the two-flavor color superconducting state. As well as restricting the quarks to a box, we project onto states of good baryon number and onto color singlets, these being necessary restrictions on any observable "quark nuggets." We find that whereas finite size alone has a significant effect for very small boxes, with the superconducting state often being destroyed, the effect of projection is to restore it again. The infinite-volume limit is a good approximation even for quite small systems MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000174980100048 L2 - DENSITY; QCD SO - Physical Review D 2002 ;65(7): 4732 UI - 9158 AU - Ampuero JP AU - Vilotte JP AU - Sanchez-Sesma FJ AD - Inst Phys Globe, Dept Sismol, UMR 7580, F-75252 Paris, FranceUNAM, Inst Ingn, Mexico City, DF, MexicoAmpuero, JP, Inst Phys Globe, Dept Sismol, UMR 7580, 4 Pl Jussieu, F-75252 Paris, France TI - Nucleation of rupture under slip dependent friction law: Simple models of fault zone AB - [1] The initiation of frictional instability is investigated for simple models of fault zone using a linearized perturbation analysis. The fault interface is assumed to obey a linear slip-weakening law. The fault is initially prestressed uniformly at the sliding threshold. In the case of antiplane shear between two homogeneous linearly elastic media, space-time and spectral solutions are obtained and shown to be consistent. The nucleation is characterized by (1) a long-wavelength unstable spectrum bounded by a critical wave number; (2) an exponential growth of the unstable modes; and (3) an induced off-fault deformation that remains trapped within a bounded zone in the vicinity of the fault. These phenomena are characterized in terms of the elastic parameters of the surrounding medium and a nucleation length that results from the coupling between the frictional interface and the bulk elasticity. These results are extended to other geometries within the same formalism and implications for three-dimensional rupture are discussed. Finally, internal fault structures are investigated in terms of a fault-parallel damaged zone. Spectral solutions are obtained for both a smooth and a layered distribution of damage. For natural faults the nucleation is shown to depend strongly on the existence of a internal damaged layer. This nucleation can be described in terms of an effective homogeneous model. In all cases, frictional trapping of the deformation out of the fault can lead to the property that arbitrarily long wavelengths remain sensitive to the existence of a fault zone MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 8 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000181028000002 L2 - earthquake nucleation;slip instability;fault zone;frictional instability;seismic rupture;SAN-ANDREAS FAULT; EARTHQUAKE NUCLEATION; CONSTITUTIVE RELATIONS; DISSIMILAR MATERIALS; VELOCITY STRUCTURE; SHEAR INSTABILITY; DYNAMIC RUPTURE; CALIFORNIA; WAVES; INITIATION SO - Journal of Geophysical Research-Solid Earth 2002 ;107(B12): 4733 UI - 10184 AU - Ancheyta J AU - Marroquin G AU - Angeles MJ AU - Macias MJ AU - Pitault I AU - Forissier M AU - Morales RD AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoInst Politecn Nacl, ESIQIE, Mexico City 07738, DF, MexicoCPE Lyon, CNRS, Lab Genie Proc Catalyt, F-69616 Villeurbanne, FranceAncheyta, J, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Some experimental observations of mass transfer limitations in a trickle-bed hydrotreating pilot reactor AB - A systematic experimental work for evaluating isothermality of a pilot reactor, flow regime, axial dispersion, and mass transfer gradients between the catalyst surface and the bulk fluid in a trickle-bed hydrotreating reactor is presented. Experiments were carried out at the following operating conditions: 5.3 MPa total pressure, 356.2 mL mL(-1) hydrogen-to-oil ratio, 613-653 K reaction temperature, and 1.0-2.5 h(-1) liquid hourly space velocity. Commercial NiMo catalyst and feedstock were used for hydrotreating reactions. The catalyst (2.3 mm diameter) bed was diluted with silicon carbide (1.4 mm diameter) with an inert-to-catalyst volume ratio of 1. Various. criteria reported in the literature were employed for evaluating axial dispersion in liquid and gas phases. Two typical tests were employed to determine mass transfer gradients: (1) changing the amount of catalyst loaded to the reactor and the feedstock flow rate at constant LHSV and (2) conducting experiments using different amounts of catalyst at variable LHSV MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000178122100008 L2 - KINETICS SO - Energy & Fuels 2002 ;16(5):1059-1067 4734 UI - 10231 AU - Andrade A AU - Giron JA AU - Amhaz JMK AU - Trabulsi LR AU - Martinez MB AD - Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Anal Clin & Toxicol, Sao Paulo, BrazilInst Butantan, Microbiol Lab, Sao Paulo, BrazilBenemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72000, MexicoGiron, JA, Benemerita Univ Autonoma Puebla, Inst Ciencias, Edificio 76 Complejo Ciencias, Puebla 72000, Mexico TI - Expression and characterization of flagella in nonmotile enteroinvasive Escherichia coli isolated from diarrhea cases AB - We report that enteroinvasive Escherichia coli (EIEC) serotypes considered to be nonmotile produce an unusually large (77 kDa) flagellin that is assembled into functional flagellum filaments that allow the bacteria to swim in modified motility agar. The EIEC flagellin showed N-terminal identity to most common enterobacterial flagellins, especially those of the E. coli H7 serotype. These data are important in terms of the epidemiology, evolution, and biology of EIEC MH - Brazil MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000178125500067 L2 - MOLECULAR CHARACTERIZATION; EPITHELIAL-CELLS; SHIGELLA; ADHERENCE; MOTILITY; STRAINS; IDENTIFICATION; POLYMORPHISM; CHILDREN; PLASMID SO - Infection and Immunity 2002 ;70(10):5882-5886 4735 UI - 10594 AU - Andreolas C AU - Xavier GD AU - Diraison F AU - Zhao C AU - Varadi A AU - Lopez-Casillas F AU - Ferre P AU - Foufelle F AU - Rutter GA AD - Univ Bristol, Dept Biochem, Bristol BS8 1TD, Avon, EnglandUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoINSERM, Unit 465, Ctr Biomed Cordeliers, Paris, FranceRutter, GA, Univ Bristol, Dept Biochem, Bristol BS8 1TD, Avon, England TI - Stimulation of acetyl-CoA carboxylase gene expression by glucose requires insulin release and sterol regulatory element binding protein 1c in pancreatic MIN6 beta-cells AB - Acetyl-CoA carboxylase I (ACCI) is a key lipogenic enzyme whose induction in islet P-cells may contribute to glucollpotoxicity. Here, we provide evidence that enhanced insulin release plays an important role in the activation of this gene by glucose. Glucose (30 vs. 3 mmol/l) increased ACCI mRNA levels similar to4-fold and stimulated ACCI (pII) promoter activity >30-fold in MIN6 cells. The latter effect was completely suppressed by blockade of insulin release or of insulin receptor signaling. However, added insulin substantially, but not completely, mimicked the effects of glucose, suggesting that intracellular metabolites of glucose may also contribute to transcriptional stimulation. Mutational analysis of the ACCI promoter, and antibody microinjection, revealed that the effect of glucose required sterol response element binding protein (SREBP)-1c. Moreover, adenoviral transduction with dominant-negative-acting SREBP1c blocked ACCI gene induction, whereas constitutively active SREBP1c increased ACCI mRNA levels. Finally, glucose also stimulated SREBP1c transcription, although this effect was independent of insulin release. These data suggest that glucose regulates ACCI gene expression in the beta-cell by complex mechanisms that may involve the covalent modification of SREBP1c. However, overexpression of SREBP1c also decreased glucose-stimulated insulin release, implicating SREBP1c induction in beta-cell lipotoxicity in some forms of type 2 diabetes MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 34 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0012-1797 UR - ISI:000177185900026 L2 - LOW-DENSITY-LIPOPROTEIN; COENZYME-A CARBOXYLASE; PYRUVATE-KINASE GENE; LACTATE-DEHYDROGENASE; TRANSCRIPTION FACTOR; MESSENGER-RNAS; POTENTIAL ROLE; LINE INS-1; SECRETION; PROMOTER SO - Diabetes 2002 ;51(8):2536-2545 4736 UI - 9530 AU - Andrew NL AU - Agatsuma Y AU - Ballesteros E AU - Bazhin AG AU - Creaser EP AU - Barnes DKA AU - Botsford LW AU - Bradbury A AU - Campbell A AU - Dixon JD AU - Einarsson S AU - Gerring PK AU - Hebert K AU - Hunter M AU - Hur SB AU - Johnson CR AU - Juinio-Menez MA AU - Kalvass P AU - Miller RJ AU - Moreno CA AU - Palleiro JS AU - Rivas D AU - Robinson SML AU - Schroeter SC AU - Steneck RS AU - Vadas RL AU - Woodby DA AU - Xiaoqi Z AD - Natl Inst Water & Atmospher Res, Wellington, New ZealandTohoku Univ, Grad Sch Agr Sci, Lab Appl Aquat Bot, Sendai, Miyagi 9818555, JapanCSIC, Ctr Estudis Avancats Blanes, E-17300 Blanes, Girona, SpainKamchatka Res Inst Fisheries & Oceanog, Petropavlovsk Kamchatski 683002, RussiaMaine Dept Marine Resources, W Boothbay Harbor, ME 04575, USANatl Univ Ireland Univ Coll Cork, Dept Zool, Cork, IrelandUniv Calif Davis, Dept Wildlife Fish & Conservat Biol, Davis, CA 95616, USAWashington Dept Fish & Wildlife, Point Whitney Shellfish Lab, Brinnon, WA 98320, USAFisheries & Oceans Canada, Pacific Biol Stn, Nanaimo, BC V9R 5K6, CanadaUniv Calif Santa Barbara, Inst Marine Sci, Santa Barbara, CA 93106, USAMarine Res Inst, IS-121 Reykjavik, IcelandAlaska Dept Fish & Game, Petersburgh, AK 99833, USAPukyong Natl Univ, Inst Fisheries Sci, Dept Aquaculture, Pusan 612021, South KoreaUniv Tasmania, Tasmanian Aquaculture & Fisheries Inst, Hobart, Tas 7001, AustraliaUniv Philippines, Inst Marine Sci, Quezon City 1101, PhilippinesCalif Dept Fish & Game, Ft Bragg, CA 95437, USAFisheries & Oceans Canada, Dartmouth, NS B2Y 4A2, CanadaUniv Austral Chile, Inst Ecol & Evoluc, Valdivia, ChileCtr Ensenada, Ensenada 22880, Baja California, MexicoSubsecretaria Pesca, Dept Pesquerias, Valparaiso, ChileFisheries & Oceans Canada, St Andrews, NB E5B 2L9, CanadaUniv Maine, Darling Marine Ctr, Walpole, ME 04573, USAUniv Maine, Dept Biol Sci, Orono, ME 04469, USAAlaska Dept Fish & Game, Douglas, AK 99824, USAOcean Univ Qingdao, Coll Fisheries, Qingdao 266003, Peoples R ChinaAndrew, NL, Natl Inst Water & Atmospher Res, POB 14-901, Wellington, New Zealand TI - Status and management of world sea urchin fisheries AB - World production of sea urchins peaked in 1995, when 120 306 t were landed. Chile dominates world production, producing more than half the world's total landings of 90 257 t in 1998. Other important fisheries are found in Japan, Maine, British Columbia, California, South Korea, New Brunswick, Russia, Mexico, Alaska, Nova Scotia, and in a number of countries that produced less than 1000 t in 1998. Aside from the Chilean fishery for Loxechinus albus, most harvest is of Strongylocentrouts spp., particularly S. intermedius, S. firanciscanus, and S. droebachiensis. Only a small minority of fisheries have been formally assessed and in the absence of such assessments it is difficult to determine whether fisheries are over-fished or whether the large declines observed in many represent the "fish down" of accumulated biomass. Nevertheless, those in Chile, Japan, Maine, California and Washington and a number of smaller fisheries, have declined considerably since their peaks and are likely to be over-fished. Fisheries in Japan, South Korea and the Philippines have been enhanced by reseeding hatchery-reared juveniles and by modifying reefs to increase their structural complexity and to promote the growth of algae. Sea urchin fisheries have potentially large ecological effects, usually mediated through increases in the abundance and biomass of large brown algae. Although such effects may have important consequences for management of these and related fisheries, only in Nova Scotia, South Korea and Japan is ecological knowledge incorporated into management MH - Australia MH - Canada MH - Chile MH - Iceland MH - Ireland MH - Japan MH - Mexico|Baja California MH - New Zealand MH - Peoples R China MH - Philippines MH - Russia MH - South Korea MH - Spain MH - USA PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 38 U4 - Marine & Freshwater Biology;Oceanography U5 - S;Article AV - English IS - 0078-3218 UR - ISI:000179883800007 L2 - NEW-SOUTH-WALES; KELP FOREST COMMUNITIES; PARACENTROTUS-LIVIDUS ECHINODERMATA; LOXECHINUS-ALBUS MOLINA; 2 CONTRASTING HABITATS; STRONGYLOCENTROTUS-FRANCISCANUS; MACROCYSTIS-PYRIFERA; NORTHERN CALIFORNIA; CENTROSTEPHANUS-RODGERSII; STOCK ENHANCEMENT SO - Oceanography and Marine Biology, Vol 40 2002 ;40():343-425 4737 UI - 9453 AU - Andrzejewska M AU - Yepez-Mulia L AU - Cedillo-Rivera R AU - Tapia A AU - Vilpo L AU - Vilpo J AU - Kazimierczuk Z AD - Univ Agr, Inst Chem, PL-02787 Warsaw, PolandIMSS, UADY, Unidad Interinst Invest Med, Merida, VenezuelaPolish Acad Sci, Med Res Ctr, Lab Expt Pharmacol, PL-02106 Warsaw, PolandHosp Pediat Mexico City, Ctr Med Nacl Siglo XXI, IMSS, Unidad Invest Med Enfermedades Infecciosas & Para, Mexico City 06725, DF, MexicoJorvi Hosp, HYSK, Dept Clin Chem, Helsinki, FinlandUniv Tampere, Sch Med, FIN-33101 Tampere, FinlandTampere Univ Hosp, Dept Clin Chem, FIN-33101 Tampere, FinlandKazimierczuk, Z, Univ Agr, Inst Chem, 159C Nowoursynowksa St, PL-02787 Warsaw, Poland TI - Synthesis, antiprotozoal and anticancer activity of substituted 2-trifluoromethyl- and 2-pentafluoroethylbenzimidazoles AB - The synthesis of several halogenated benzimidazoles substituted in position 2 with trifluoromethyl, pentafluoroethyl and 2-thioethylaminodimethyl group is reported. Antiprotozoal and anticancer activity of series of newly synthesized and previously obtained compounds was studied. All of tested bezimidazoles showed remarkable antiprotozoal activity against Giardia intestinalis, Entamoeba histolytica and Trichomonas vaginalis. Of the studied collection of halogenated benzimidazoles the most anticancer-active was the 5,6-dichloro-2-pentafluoroethyl compound, particularly against breast and prostate cancer cell lines. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Finland MH - Mexico|Distrito Federal MH - Poland MH - Venezuela PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Medicinal U5 - J;Article AV - English IS - 0223-5234 UR - ISI:000180213800006 L2 - 2-trifluoromethylbenzimidazoles;2-pentafluoroethylbenzimidazoles;antiprotozoal activity;anticancer activity;ANTIMICROBIAL ACTIVITY; BENZIMIDAZOLES; DERIVATIVES; ALBENDAZOLE; AGENTS SO - European Journal of Medicinal Chemistry 2002 ;37(12):973-978 4738 UI - 9885 AU - Angeler DG AU - Rodrigo MA AU - Sanchez-Carrillo S AU - varez-Cobelas M AD - Univ Castilla La Mancha, Fac Environm Sci, Toledo 45071, SpainUniv Valencia, Cavanilles Inst Biodivers & Evolutionary Biol, Valencia 46980, SpainInst Tecnol Sonora, Sonora 85000, MexicoCSIC, Ctr Environm Sci, E-28006 Madrid, SpainAngeler, DG, Univ Castilla La Mancha, Fac Environm Sci, Technol Campus,Avda Carlos III S-N, Toledo 45071, Spain TI - Effects of hydrologically confined fishes on bacterioplankton and autotrophic picoplankton in a semiarid marsh AB - An enclosure experiment was conducted to assess the separate effects of exotic benthivorous (Cyprinus carpio L.), planktivorous (Gambusia holbrooki Gir.), and omnivorous (Lepomis gibbosus L.) fish on the dynamics of bacterioplankton (BAC) and autotrophic picoplankton (APP) in a semiarid Spanish marsh. Special emphasis was put on simulating the effect of natural fish density situations occurring under periods of hydrological confinement in the wetland, i.e. during summer draw downs or artificial water-level reductions, when fish biomass can reach high levels. The resulting simulation of such a scenario (C. carpio, 5000 to 6000 kg ha(-1); L. gibbosus, 1300 to 1700 kg ha(-1), and G. holbrooki, 115 kg ha(-1)) revealed that C. carpio and L. gibbosus significantly increased the trophic level in the enclosures. This resulted in a significant increase of BAC in the respective treatments. G. holbrooki, on the other hand, failed to fuel BAC growth. Considering APP, composed of phycocyanin-rich picocyanobacteria Synechococcus sp., no fish treatment effects were detected, suggesting that the fishes, independent of biomasses used, were not important in driving APP. Results indicate that microbial communities respond in different ways to changes in fish biomass in fluctuating wetlands MH - Mexico|Sonora MH - Spain PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Marine & Freshwater Biology;Microbiology U5 - J;Article AV - English IS - 0948-3055 UR - ISI:000179257300009 L2 - bacterioplankton;autotrophic picoplankton;fishes;enclosures;wetland;FRESH-WATER ECOSYSTEMS; BACTERIA; LAKE; ZOOPLANKTON; COMPONENTS; NUTRIENTS; DYNAMICS; BIOMASS; MARINE; WEB SO - Aquatic Microbial Ecology 2002 ;29(3):307-312 4739 UI - 10349 AU - Angulo Y AU - Olamendi-Portugal T AU - ape-Giron A AU - Possani LD AU - Lomonte B AD - Univ Costa Rica, Fac Microbiol, Inst Clodomiro Picado, San Jose, Costa RicaUniv Costa Rica, Escuela Med, Dept Bioquim, San Jose, Costa RicaUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Recognit & Struct Biol, Cuernavaca, Morelos, MexicoLomonte, B, Univ Costa Rica, Fac Microbiol, Inst Clodomiro Picado, San Jose, Costa Rica TI - Structural characterization and phylogenetic relationships of myotoxin II from Atropoides (Bothrops) nummifer snake venom, a Lys49 phospholipase A(2) homologue AB - In order to analyze its structure-function relationships, the complete amino acid sequence of myotoxin II from Atropoides (Bothrops) nummifer from Costa Rica was determined. This toxin is a Lys49-type phospholipase A(2) (PLA(2)) homologue, devoid of catalytic activity, structurally belonging to class IIA. In addition to the Asp49 --> Lys change in the (inactive) catalytic center, substitutions in the calcium-binding loop suggest that its lack of enzymatic activity is due to the loss of ability to bind Ca2+. The toxin occurs as a homodimer of basic subunits of 121 residues. Its sequence has highest similarity to Lys49 PLA(2)s from Cerrophidion, Trimeresurus, Bothrops and Agkistrodon, species, which form a subfamily of proteins that diverged early from Asp49 PLA(2)s present in the same species, as shown by phylogenetic analysis. The tertiary structure of the toxin was modeled, based on the coordinates of Cerrophidion godmani myotoxin II. Its exposed C-terminal region 115-129 shows several differences in comparison to the homologous sequences of other Lys49 PLA(2)s, i.e. from Agkistrodon p. piscivorus and Bothrops asper. Region 115-129 of the latter two proteins has been implicated in myotoxic activity, on the basis of the direct membrane-damaging of their corresponding synthetic peptides. However, peptide 115-129 of A. nummifer myotoxin II did not exert toxicity upon cultured skeletal muscle cells or mature muscle in vivo. Differences in several amino acid residues, either critical for toxicity, or influencing the conformation of free peptide 115-129 from A. nummifer myotoxin II, may account for its lack of direct membrane-damaging properties. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Costa Rica MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1357-2725 UR - ISI:000177744600011 L2 - snake venom;myotoxin;phospholipase A(2);Atropoides nummifer;bothrops;TRIMERESURUS-FLAVOVIRIDIS VENOM; MEMBRANE-DAMAGING ACTIVITIES; AMINO-ACID-SEQUENCE; JUMPING VIPER; ACCELERATED EVOLUTION; PISCIVORUS PISCIVORUS; ASPER TERCIOPELO; COSTA-RICA; IDENTIFICATION; REGION SO - International Journal of Biochemistry & Cell Biology 2002 ;34(10):1268-1278 4740 UI - 10735 AU - Antillon A AU - Jose JV AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoNortheastern Univ, Dept Phys, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115, USAAntillon, A, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Dynamic control of an embedded cavity resonator AB - We propose two embedded elliptic billiards as a possible cavity resonator. We analyze the ray and wave optic properties of the resonators, mostly in 2D but also in 3D. We show that this system can produce special whispering gallery modes that can be controlled by changing the parameters of the billiards. Our results indicate that this configuration may work well as a short wavelength practical table-top cavity resonator. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000176767400020 L2 - LASER CAVITY; AMPLIFICATION SO - Optics Communications 2002 ;208(1-3):145-153 4741 UI - 10730 AU - Antonevych O AU - Forstmann F AU - az-Herrera E AD - Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoAntonevych, O, Free Univ Berlin, Inst Theoret Phys, Arnimallee 14, D-14195 Berlin, Germany TI - Phase diagram of symmetric binary fluid mixtures: First-order or second-order demixing AB - Binary fluid mixtures of 1:1 concentration can demix in a phase transition of first order or of second order. We analyze the two scenarios in density-concentration space and relate them to the structure of the line at which the demixing coexistence surface cuts the liquid-vapor coexistence surface. These scenarios help us to decide between first and second order for a model of a symmetric Lennard-Jones mixture. An optimized reference hypernetted chain integral equation method is employed for calculating the correlation functions and from there the pressure and chemical potentials. We conclude that demixing of a 1:1 mixture is of first order in the whole range of parameters that we have investigated. We did not find a critical point in the 1:1 concentration plane MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000176762500040 L2 - CRITICAL END-POINTS; DENSITY-FUNCTIONAL THEORY; RANGED ORIENTATIONAL ORDER; LIQUID-LIQUID INTERFACES; DIPOLAR FLUIDS; HARD-SPHERES; INTEGRAL-EQUATION; INHOMOGENEOUS LIQUIDS; SPHERICAL-MODELS; HEISENBERG FLUID SO - Physical Review e 2002 ;65(6): 4742 UI - 10413 AU - Aragon JL AU - Naumis GG AU - Torres M AD - Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoConsejo Super Invest Cient, Inst Fis Aplicada, Madrid 28006, SpainAragon, JL, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 1-1010, Queretaro 76000, Mexico TI - A multigrid approach to the average lattices of quasicrystals (vol A58, pg 352, 2002) MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Correction AV - English IS - 0108-7673 UR - ISI:000177624300016 SO - Acta Crystallographica Section A 2002 ;58():507-507 4743 UI - 10791 AU - Aragon JL AU - Torres M AU - Gil D AU - Barrio RA AU - Maini PK AD - Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoCSIC, Inst Fis Aplicada, E-28006 Madrid, SpainUniv Complutense, Fac Ciencias Geol, Dept Paleontol, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Oxford, Inst Math, Ctr Math Biol, Oxford OX1 3LB, EnglandAragon, JL, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 1-1010, Queretaro 76000, Mexico TI - Turing patterns with pentagonal symmetry AB - We explore numerically the formation of Turing patterns in a confined circular domain with small aspect ratio. Our results show that stable fivefold patterns are formed over a well defined range of disk sizes, offering a possible mechanism for inducing the fivefold symmetry observed in early development of regular echinoids. Using this pattern as a seed, more complex biological structures can be mimicked, such as the pigmentation pattern of sea urchins and the plate arrangements of the calyxes of primitive camerate crinoids MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000176552300090 L2 - COAT MARKINGS; MODEL; DIFFUSION; SYSTEMS; POMACANTHUS; APPENDAGES; MECHANISMS; CHEMOTAXIS; EVOLUTION; ORIGIN SO - Physical Review e 2002 ;65(5): 4744 UI - 10815 AU - Aragon JL AU - Naumis GG AU - Torres M AD - Univ Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoConsejo Super Invest Cient, Inst Fis Aplicada, Madrid 28006, SpainAragon, JL, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 1-1010, Queretaro 76000, Mexico TI - A multigrid approach to the average lattices of quasicrystals AB - An average structure associated with a given quasilattice is a system composed of several average lattices that in reciprocal space produces strong main reflections. The average lattice of a quasicrystal is a useful concept closely related to the geometric description of the quasicrystal to crystal transformation and has been proved to be structurally significant. Here we calculate average structures for arbitrary two- and three-dimensional quasilattices using the dual generalized method. Additionally, closed analytical expressions for the coordinates of the average structure, the quasiperiodic lattice and its diffraction pattern are given MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 6 U4 - Crystallography U5 - J;Article AV - English IS - 0108-7673 UR - ISI:000176495500007 L2 - QUASI-CRYSTALS; UNIT-CELL SO - Acta Crystallographica Section A 2002 ;58():352-360 4745 UI - 10863 AU - Araus JL AU - Slafer GA AU - Reynolds MP AU - Royo C AD - Univ Barcelona, Fac Biol, Unitat Fisiol Vegetal, E-08028 Barcelona, SpainUniv Buenos Aires, Fac Agron, Dept Prod Vegetal, RA-1417 Buenos Aires, DF, ArgentinaUniv Buenos Aires, Fac Agron, IFEVA, RA-1417 Buenos Aires, DF, ArgentinaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoIRTA, Ctr UdL, Area Conreus Extensius, Lleida 25198, SpainAraus, JL, Univ Barcelona, Fac Biol, Unitat Fisiol Vegetal, Diagonal 645, E-08028 Barcelona, Spain TI - Plant breeding and drought in C-3 cereals: What should we breed for? AB - Drought is the main abiotic constraint on cereal yield. Analysing physiological determinants of yield responses to water may help in breeding for higher yield and stability under drought conditions. The traits to select (either for stress escape, avoidance or tolerance) and the framework where breeding for drought stress is addressed will depend on the level and timing of stress in the targeted area. If the stress is severe, breeding under stress-free conditions may be unsuccessful and traits that confer survival may become a priority. However, selecting for yield itself under stress-alleviated conditions appears to produce superior cultivars, not only for optimum environments, but also for those characterized by frequent mild and moderate stress conditions. This implies that broad avoidance/tolerance to mild-moderate stresses is given by constitutive traits also expressed under stress-free conditions. In this paper, we focus on physiological traits that contribute to improved productivity under mild-moderate drought. Increased crop performance may be achieved through improvements in water use, water-use efficiency and harvest index. The first factor is relevant when soil water remains available at maturity or when deep-rooted genotypes access water in the soil profile that is not normally available; the two latter conditions become more important when all available water is exhausted by the end of the crop cycle. Independent of the mechanism operating, a canopy able to use more water than another would have more open stomata and therefore higher canopy temperature depression, and C-13 discrimination (Delta(13)C) in plant matter. The same traits would also seem to be relevant when breeding for hot, irrigated environments. Where additional water is not available to the crop, higher water-use efficiency (WUE) appears to be an alternative strategy to improve crop performance. In this context Delta(13)C constitutes a simple but reliable measure of WUE. However, in contrast to lines performing better because of increased access to water, lines producing greater biomass due to superior WUE will have lower Delta(13)C values. WUE may be modified not only through a decrease in stomatal conductance. but also through an increase in photosynthetic capacity. Harvest index is strongly reduced by terminal drought (i.e. drought during grain filling). Thus, phenological traits increasing the relative amount of water used during grain filling, or adjusting the crop cycle to the seasonal pattern of rainfall may be useful. Augmenting the contribution of carbohydrate reserves accumulated during vegetative growth to grain filling may also be worthwhile in harsh environments. Alternatively, extending the duration of stein elongation without changing the timing of anthesis would increase the number of grains per spike and the harvest index without changing the amount of water utilized by the crop. (C) 2002 Annals of Botany Company MH - Argentina MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 78 U4 - Plant Sciences U5 - J;Review AV - English IS - 0305-7364 UR - ISI:000176402100014 L2 - barley;drought;Hordeum vulgare L.;physiological traits;Triticum aestivum L.;Triticum turgidum L. var. durum;wheat;yield;stress;CARBON-ISOTOPE DISCRIMINATION; WATER-USE EFFICIENCY; WESTERN MEDITERRANEAN BASIN; WHEAT TRITICUM-AESTIVUM; INFRARED REFLECTANCE SPECTROSCOPY; RADIATION-USE EFFICIENCY; FIELD GROWN BARLEY; PAST 7 MILLENNIA; GRAIN-YIELD; DURUM-WHEAT SO - Annals of Botany 2002 ;89():925-940 4746 UI - 11910 AU - Araya E AU - Hofner P AU - Churchwell E AU - Kurtz S AD - Univ Puerto Rico, Dept Phys, San Juan, PR 00931, USACornell Univ, NAIC, Arecibo Observ, Ithaca, NY 14853, USAUniv Wisconsin, Dept Astron, Madison, WI 53706, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoAraya, E, Univ Puerto Rico, Dept Phys, POB 23343, San Juan, PR 00931 USA TI - Arecibo observations of formaldehyde and radio recombination lines toward ultracompact HII regions AB - We report observations of the H110alpha radio recombination line and H2CO (1(10) = 1(11)) toward 21 ultracompact H II regions with the Arecibo 305 m radio telescope. We detect the H110a line in 20 sources, and for each of these we also detect a H2CO absorption feature at nearly the same velocity, demonstrating the association between molecular and ionized gas. We determine kinematic distances and resolve the distance ambiguity for all observed H II regions, as well as for 19 intervening molecular clouds. A plot of the Galactic distribution of these objects traces part of the spiral structure in the first Galactic quadrant. We compare flux densities and velocities as measured with the Arecibo Telescope with interferometric measurements of our sample of ultracompact H II regions. In general, the single-dish fluxes exceed the interferometric values, consistent with an extended component of radio continuum emission MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000173507500004 L2 - Galaxy : structure;HII regions;ISM : molecules;radio lines : ISM;H-II-REGIONS; ABSORPTION; EMISSION; GALAXY; SKY SO - Astrophysical Journal Supplement Series 2002 ;138(1):63-74 4747 UI - 10401 AU - Arce H AU - Lopez A AU - Guevara MR AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, MexicoMcGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Ctr Nonlinear Dynam Physiol & Med, Montreal, PQ H3G 1Y6, CanadaArce, H, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Apartado Postal 70-542, Mexico City 04510, DF, Mexico TI - Triggered alternans in an ionic model of ischemic cardiac ventricular muscle AB - It has been known for several decades that electrical alternans occurs during myocardial ischemia in both clinical and experimental work. There are a few reports showing that this alternans can be triggered into existence by a premature ventricular contraction. Detriggering of alternans by a premature ventricular contraction, as well as pause-induced triggering and detriggering, have also been reported. We conduct a search for triggered alternans in an ionic model of ischemic ventricular muscle in which alternans has been described recently: a one-dimensional cable of length 3 cm, containing a central ischemic zone 1 cm long, with 1 cm segments of normal (i.e., nonischemic) tissue at each end. We use a modified form of the Luo-Rudy [Circ. Res. 68, 1501-1526 (1991)] ionic model to represent the ventricular tissue, modeling the effect of ischemia by raising the external potassium ion concentration ([K+](o)) in the central ischemic zone. As [K+](o) is increased at a fixed pacing cycle length of 400 ms, there is first a transition from 1:1 rhythm to alternans or 2:2 rhythm, and then a transition from 2:2 rhythm to 2:1 block. There is a range of [K+](o) over which there is coexistence of 1:1 and 2:2 rhythms, so that dropping a stimulus from the periodic drive train during 1:1 rhythm can result in the conversion of 1:1 to 2:2 rhythm. Within the bistable range, the reverse transition from 2:2 to 1:1 rhythm can be produced by injection of a well-timed extrastimulus. Using a stimulation protocol involving delivery of pre- and post-mature stimuli, we derive a one-dimensional map that captures the salient features of the results of the cable simulations, i.e., the {1:1-->2:2-->2:1} transitions with {1:1<---->2:2} bistability. This map uses a new index of the global activity in the cable, the normalized voltage integral. Finally, we put forth a simple piecewise linear map that replicates the {1:1<---->2:2} bistability observed in the cable simulations and in the normalized voltage integral map. (C) 2002 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000177682000027 L2 - ACUTE MYOCARDIAL-ISCHEMIA; T-WAVE ALTERNANS; ACUTE CORONARY-OCCLUSION; LONG QT SYNDROME; PURKINJE-FIBERS; DISCORDANT ALTERNANS; ACTION-POTENTIALS; CHAOTIC BEHAVIOR; PREMATURE BEAT; CELLS SO - Chaos 2002 ;12(3):807-818 4748 UI - 10043 AU - Archibald EN AU - Dunlop JS AU - Jimenez R AU - Friaca ACS AU - Mclure RJ AU - Hughes DH AD - Joint Astron Ctr, Hilo, HI 96720, USAUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandRutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854, USAUniv Sao Paulo, Inst Astron & Geofis, BR-04301904 Sao Paulo, BrazilUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoArchibald, EN, Joint Astron Ctr, 660 N Aohoku Pl,Univ Pk, Hilo, HI 96720 USA TI - Coupled spheroid and black hole formation, and the multifrequency detectability of active galactic nuclei and submillimetre sources AB - We use a simple model of spheroid formation to explore the relationship between the creation of stars and dust in a massive protogalaxy and the growth of its central black hole. This model predicts that submillimetre luminosity peaks after only similar or equal to0.2 Gyr. However, without a very massive seed black hole, Eddington-limited growth means that a black hole mass of 10(9) M-., and hence very luminous active galactic nuclei (AGN) activity, cannot be produced until >0.5 Gyr after the formation of the first massive stars in the halo. The model thus predicts a time-lag between the peak of submillimetre luminosity and AGN luminosity in a massive protoelliptical of a few times 10(8) yr. For a formation redshift z similar or equal to 5, this means that powerful AGN activity is delayed until zsimilar or equal to 3.5, by which time star formation in the host is similar or equal to90 per cent complete, and submillimetre luminosity has declined to similar or equal to25 per cent of its peak value. This provides a natural explanation for why successful submillimetre detections of luminous radio galaxies are largely confined to z > 2.5. Conversely the model also predicts that while all high-redshift luminous submillimetre-selected sources should contain an active (and growing) black hole, the typical luminosity of the AGN in such objects is similar or equal to1000 times smaller than that of the most powerful AGN. This is consistent with the almost complete failure to detect submillimetre selected galaxies with existing X-ray surveys. Finally, the model yields a black hole-spheroid mass ratio, which evolves rapidly in the first Gyr, but asymptotes to similar or equal to0.001-0.003 in agreement with results at low redshift. This ratio arises not because the AGN terminates star formation, but because fuelling of the massive black hole is linked to the total mass of gas available for star formation in the host MH - USA MH - Brazil MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000178605800007 L2 - dust, extinction;galaxies : active;galaxies : elliptical and lenticular, cD;galaxies : evolution;quasars : general;submillimetre;COLOR MAGNITUDE RELATION; EARLY-TYPE GALAXIES; ELLIPTIC GALAXIES; STAR-FORMATION; HIGH-REDSHIFT; RADIO GALAXY; PRECISION PHOTOMETRY; MOLECULAR CLOUD; VIRGO CLUSTERS; MASS STARS SO - Monthly Notices of the Royal Astronomical Society 2002 ;336(2):353-362 4749 UI - 9596 AU - Ardiles LG AU - Ehrenfeld P AU - Quiroz Y AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AU - Mezzano S AU - Figueroa CD AD - Univ Austral Chile, Dept Nefrol, Fac Med, Valdivia, ChileUniv Austral Chile, Inst Histol & Pathol, Valdivia, ChileInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoUniv Hosp, Maracaibo, VenezuelaArdiles, LG, Univ Austral Chile, Dept Nefrol, Fac Med, POB 567, Valdivia, Chile TI - Effect of mycophenolate mofetil on kallikrein expression in the kidney of 516 nephrectomized rats AB - It has recently been proposed that tubulointerstitial damage plays a key role in the pathogenesis of sodium-dependent hypertension. Since components, enzymes and substrates, of the kallikrein-kinin system (KKS) are synthesized by connecting and collecting tubules, respectively, it is expected that damage of any origin, involving the tubulointerstitial compartment, may affect the functionality of these nephron segments and impair blood pressure control. Therefore, we analyzed renal kallikrein expression in the 5/6 renal ablation model, which is characterized by a progressive tubulointerstitial damage and systemic hypertension. In addition, we studied the renal expression of this enzyme after treatment of healthy and 5/6 nephrectornized rats with mycophenolate mofetil (MMF), an immunosuppressive drug known to reduce tubulointerstitial damage in this model. Twenty-six male Sprague-Dawley rats were included in this study. Seven 5/6 nephrectornized rats (Nx), 4 sham-operated (Sham) rats and 5 Nx rats treated with MMF (Nx + MMF) were studied 4 weeks after surgery. For comparison, 6 healthy rats treated with MMF at the same dose were compared with 4 vehicle-treated controls. Tubulointerstitial damage was significantly high in Nx compared with Nx-MMF and sham-operated rats. Blood pressure was significantly higher in Nx (178 +/- 7.8 mm Hg) than in Sham (120 +/- 2.0 mm Hg, p < 0.05) and Nx + MMF animals (154 < 5.6 mm Hg, p < 0.05). Renal kallikrein expression, quantified by a computer image system was significantly lower in the Nx group (1,696 437 density/mm(2)) than in Sham (9,779 +/- 4,068 density/mm(2), p < 0.05), and in Nx + MMF groups (4,640 1,578 density/mm(2), p < 0.05). Healthy animals treated with MMF did not show tubulointerstitial damage, changes in blood pressure nor changes in the expression of immunoreactive renal kallikrein suggesting that improvement in kallikrein expression after MMF treatment of 5/6 nephrectomy was not due to a direct effect of the drug on kallikreinproducing cells. Our results suggest that protection of the KKS after 5/6 nephrectomy may have additional renoprotective effects and may reduce the progression of renal disease. Copyright (C) 2002 S. Karger AG, Basel MH - Chile MH - Mexico|Distrito Federal MH - Venezuela PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 5 U4 - Physiology;Urology & Nephrology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 1420-4096 UR - ISI:000179802800003 L2 - renal kallikrein;mycophenolate mofetil;5/6 nephrectomy;immunohistochemistry;hypertension;renal ablation;CONVERTING ENZYME-INHIBITORS; CHRONIC-RENAL-FAILURE; BLOOD-PRESSURE CONTROL; SALT-SENSITIVE RATS; RECEPTOR ANTAGONIST; TISSUE KALLIKREIN; NITRIC-OXIDE; DISEASE; HYPERTENSION; BRADYKININ SO - Kidney & Blood Pressure Research 2002 ;25(5):289-295 4750 UI - 10688 AU - Arellano JS AU - Molina LM AU - Rubio A AU - Lopez MJ AU - Alonso JA AD - Univ Autonoma Metropolitana Azcapotzalco, Area Fis Atom Mol Aplicada, Mexico City 02200, DF, MexicoAarhus Univ, Inst Phys & Astron, DK-8000 Aarhus, DenmarkUniv Pais Vasco, Dept Fis Mat, San Sebastian 20018, SpainUniv Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainArellano, JS, Univ Autonoma Metropolitana Azcapotzalco, Area Fis Atom Mol Aplicada, Mexico City 02200, DF, Mexico TI - Interaction of molecular and atomic hydrogen with (5,5) and (6,6) single-wall carbon nanotubes AB - Density functional theory has been used to study the interaction of molecular and atomic hydrogen with (5,5) and (6,6) single-wall carbon nanotubes. Static calculations allowing for different degrees of structural relaxation are performed, in addition to dynamical simulations. Molecular physisorption inside and outside the nanotube walls is predicted to be the most stable state of those systems. The binding energies for physisorption of the H-2 molecule outside the nanotube are in the range 0.04-0.07 eV. This means that uptake and release of molecular hydrogen from nanotubes is a relatively easy process, as many experiments have proved. A chemisorption state, with the molecule dissociated and the two hydrogen atoms bonded to neighbor carbon atoms, has also been found. However, reaching this dissociative chemisorption state for an incoming molecule, or starting from the physisorbed molecule, is difficult because of the existence of a substantial activation barrier. The dissociative chemisorption deforms the tube and weakens the C-C bond. This effect can catalyze the shattering and scission of the tube by incoming hydrogen molecules with sufficient kinetic energy. (C) 2002 American Institute of Physics MH - Denmark MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 59 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000176874200043 L2 - MONTE-CARLO SIMULATIONS; AB-INITIO; ROOM-TEMPERATURE; FIRST-PRINCIPLES; ADSORPTION; STORAGE; SYSTEMS; PHYSISORPTION; PRESSURE; GRAPHITE SO - Journal of Chemical Physics 2002 ;117(5):2281-2288 4751 UI - 10402 AU - Arellano RO AU - Martinez-Torres A AU - Garay E AD - UNAM, Ctr Neurobiol, Queretaro 76230, CP, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697, USAArellano, RO, UNAM, Ctr Neurobiol, Domicilio Conocido Km 15 Carretera QRO-SLP, Queretaro 76230, CP, Mexico TI - Ionic currents activated via purinergic receptors in the cumulus cell-enclosed mouse oocyte AB - Several chemical signals synthesized in the ovary, including neurotransmitters, have been proposed to serve as regulators of folliculogenesis, however, their mechanisms of action have not been completely elucidated. Here, electrophysiological and molecular biology techniques were used to study responses generated via purinergic stimulation in cultured mouse cumulus cell-enclosed oocytes (CEOs). Application of extracellular ATP elicited depolarizing responses in CEOs. Using the voltage clamp technique by impaling oocytes with two microelectrodes, we determined that these responses were mainly due to activation of two distinct ionic currents. The first corresponded to the opening of Ca2+-dependent Cl (-) channels (l(Cl(Ca))) and the second to the opening of Ca2+-independent channels that are permeable to Na+ (l(c+)). The potency order for different nucleotides (50 muM) was UTP > ATP > 2meS-ATP > ADP, and alpha,betame-ATP and adenosine were found to be inactive. Suramin (100 muM) blocked the response elicited by ATP or UTP. In addition, voltage dependent K+ currents activated by depolarization of CEOs were characterized. All CEO ionic currents recorded from the oocyte were completely inhibited by octanol (11 muM), a gap junction blocker. Thus, purinergic responses and K+ currents originate mainly in the membrane of cumulus cells. Transcripts of the purinergic receptor P2Y(2) subtype were amplified by polymerase chain reaction from the cDNA of granulosa cells or cumulus cells. This study shows that P2Y(2) receptors are expressed in CEOs, and that their stimulation opens at least two different types of ion channels. Both the ion channels and the receptors seemed to be located in the cumulus cells, which transmit their corresponding electrical signals to the oocyte via gap junction channels MH - Mexico|Queretaro MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 4 U4 - Reproductive Biology U5 - J;Article AV - English IS - 0006-3363 UR - ISI:000177668200020 L2 - cumulus cells;follicular development;granulosa cells;neurotransmitters;signal transduction;PORCINE GRANULOSA-CELLS; FOLLICLE-STIMULATING-HORMONE; LUTEINIZING-HORMONE; XENOPUS-OOCYTES; GAP-JUNCTIONS; ACETYLCHOLINE-RECEPTORS; CALCIUM MOBILIZATION; MEIOTIC MATURATION; MEMBRANE CAPACITY; MAMMALIAN OOCYTE SO - Biology of Reproduction 2002 ;67(3):837-846 4752 UI - 9804 AU - Arghavani J AU - Derenne A AU - Marchand L AD - Ecole Polytech, Dept Mech Engn, Montreal, PQ H3C 3A7, CanadaArghavani, J, Dept Mechatron & Automat, Tec Monterrey State Mexico Campus,Catteterra Lago, Mexico City 52926, DF, Mexico TI - Prediction of gasket leakage rate and sealing performance through fuzzy logic AB - Leakage rate prediction and control are of the utmost importance in most industrial applications for gasketed flanged joints in high-pressure systems, for safety and environmental reasons. In addition, loss of media, and damage to the plant, resulting from leaky joints can be very costly for the industries. Gasket testing and the evaluation of their sealing performance are complex, time-consuming, and costly, and require sophisticated tools capable of predicting leakage based on limited data. In the present work, fuzzy logic is used as a tool to predict the leakage rate and gasket performance of gasketed flanged joints. Different fuzzy models are developed and validated with experimental results for given operating conditions, taking into consideration the gasket type and surface roughness of the mating faces. It is shown that limited experimental test data can be used to build fuzzy models that predict gasket leakage rate and sealing performance MH - Canada MH - Mexico|Distrito Federal PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Manufacturing U5 - J;Article AV - English IS - 0268-3768 UR - ISI:000179365300009 L2 - fuzzy logic;gasket performance;gasketed flanged joints;leakage rate prediction;limited data points SO - International Journal of Advanced Manufacturing Technology 2002 ;20(8):612-620 4753 UI - 8272 AU - Arias JM AU - Alonso CE AU - Frank A AD - Univ Sevilla, Dept Fis Atom Mol & Nucl, Seville 41080, SpainUniv Nacl Autonoma Mexico, ICN, Mexico City 04510, DF, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoArias, JM, Univ Sevilla, Dept Fis Atom Mol & Nucl, Aptdo 1065, Seville 41080, Spain TI - Critical point E(5) symmetry in the Ru isotopes AB - The recently proposed E(5) symmetry is investigated in the chain of Ru isotopes MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000183338000017 L2 - INTERACTING-BOSON MODEL; LIMIT; STATES SO - Czechoslovak Journal of Physics 2002 ;52():C571-C574 4754 UI - 10428 AU - Arlt J AU - MacDonald M AU - Paterson L AU - Sibbett W AU - Dholakia K AU - Volke-Sepulveda K AD - Univ Edinburgh, COSMIC, JCMB, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandINAOE, Grp Foton & Fis Opt, Puebla 72000, MexicoArlt, J, Univ Edinburgh, COSMIC, JCMB, Kings Bldg, Edinburgh EH9 3JZ, Midlothian, Scotland TI - Moving interference patterns created using the angular Doppler-effect AB - We use the angular Doppler-effect to obtain stable frequency shifts from below one Hertz to hundreds of Hertz in the optical domain, constituting a control of 1 part in 10(14). For the first time, we use these very small frequency shifts to create continuous motion in interference patterns including the scanning of linear fringe patterns and the rotation of the interference pattern formed from a Laguerre-Gaussian beam. This enables controlled lateral and rotational movement of trapped particles. (C) 2002 Optical Society of America MH - Mexico|Puebla MH - United Kingdom PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000177417300012 L2 - FREQUENCY-SHIFT; PARTICLES SO - Optics Express 2002 ;10(16):844-852 4755 UI - 10540 AU - Armienta MA AU - Ongley LK AU - Rodriguez R AU - Villasenor G AU - Mango H AD - UNAM, Inst Geofis, Mexico City 04510, DF, MexicoAndroscoggin Valley Environm Ctr, Lewiston, ME 04240, USACastleton State Coll, Dept Nat Sci, Castleton, VT 05735, USAArmienta, MA, UNAM, Inst Geofis, Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - Response to B. Morse (2001) on "The role of arsenic-bearing rocks in groundwater pollution at Zimapan Valley, Mexico" by Armienta and others, Environmental Geology 40(4/5) MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Editorial Material AV - English IS - 0943-0105 UR - ISI:000177207700012 L2 - WATER; MINE SO - Environmental Geology 2002 ;42(4):433-438 4756 UI - 11658 AU - Arnaud P AU - Bouvier C AU - Cisneros L AU - Dominguez R AD - ENGEES, F-67070 Strasbourg, FranceIRD, F-34032 Montpellier, FranceUNAM, Inst Ingn, Mexico City 04510, DF, MexicoArnaud, P, ENGEES, 1 Quai Koch,BP 1039F, F-67070 Strasbourg, France TI - Influence of rainfall spatial variability on flood prediction AB - This paper deals with the sensitivity of distributed hydrological models to different patterns that account for the spatial distribution of rainfall: spatially averaged rainfall or rainfall field. The rainfall data come from a dense network of recording rain gauges that cover approximately 2000 km(2) around Mexico City. The reference rain sample accounts for the 50 most significant events, whose mean duration is about 10 h and maximal point depth 170 mm. Three models were tested using different runoff production models: storm-runoff coefficient, complete or partial interception. These models were then applied to four fictitious homogeneous basins, whose sizes range front 20 to 1500 km(2). For each test, the sensitivity of the model is expressed as the relative differences between the empirical distribution of the peak flows (and runoff volumes), calculated according to the two patterns of rainfall input: uniform or non-uniform. Differences in flows range from 10 to 80%, depending on the type of runoff production model used, the size of the basin and the return period of the event. The differences are generally moderate for extreme events. In the local context, this means that uniform design rainfall combining point rainfall distribution and the probabilistic concept of the areal reduction factor could be sufficient to estimate major flood probability. Differences are more significant for more frequent events. This can generate problems in calibrating the hydrological model when spatial rainfall localization is not taken into account: a bias in the estimation of parameters makes their physical interpretation difficult and leads to overestimation of extreme flows. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000174197900016 L2 - rainfall variability;distributed hydrological model;rainfall fields;sensitivity;flood estimation;Mexico;SPACE-TIME RAINFALL; AREAL RAINFALL; PARAMETER-ESTIMATION; POINT RAINFALL; GAUGE DATA; MODEL; PRECIPITATION; RUNOFF; SCALE; TRANSFORMATION SO - Journal of Hydrology 2002 ;260(1-4):216-230 4757 UI - 9416 AU - Arriada N AU - Sotelo J AU - Jones RFC AU - Portnoy HD AD - Natl Inst Neurol & Neurosurg, Mexico City 14269, DF, MexicoSydney Childrens Hosp, Dept Neurosurg, Sydney, NSW, AustraliaSotelo, J, Natl Inst Neurol & Neurosurg, Sur 3877 CP, Mexico City 14269, DF, Mexico TI - Review: Treatment of hydrocephalus in adults MH - Australia MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Clinical Neurology;Surgery U5 - J;Review AV - English IS - 0090-3019 UR - ISI:000180325200007 L2 - CEREBROSPINAL-FLUID SHUNT; ENDOSCOPIC 3RD VENTRICULOSTOMY; NORMAL-PRESSURE HYDROCEPHALUS; RUPTURED INTRACRANIAL ANEURYSMS; SUBARACHNOID HEMORRHAGE; NONCOMMUNICATING HYDROCEPHALUS; AQUEDUCTAL STENOSIS; VENTRICULOPERITONEAL SHUNTS; ANTIBIOTIC-PROPHYLAXIS; RETROSPECTIVE ANALYSIS SO - Surgical Neurology 2002 ;58(6):377-384 4758 UI - 10595 AU - Arriaga AK AU - Orozco EH AU - Aguilar LD AU - Rook GAW AU - Pando RH AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Sect, Mexico City, DF, MexicoRoyal Free & Univ Coll Med Sch, Windeyer Inst Med Sci, Dept Med Microbiol, London, EnglandPando, RH, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Sect, Calle Vasco Quiroga 15, Mexico City, DF, Mexico TI - Immunological and pathological comparative analysis between experimental latent tuberculous infection and progressive pulmonary tuberculosis AB - Mycobacterium tuberculosis produces latent infection or progressive disease. Indeed, latent infection is more common since it occurs in one-third of the world's population. We showed previously, using human material with latent tuberculosis, that mycobacterial DNA can be detected by in situ PCR in a variety of cell types in histologically-normal lung. We therefore sought to establish an experimental model in which this phenomenon could be studied in detail. We report here the establishment of such a model in C57Bl/6 x DBA/2 F1 hybrid mice by the intratracheal injection of low numbers of virulent mycobacteria (4000). Latent infection was characterized by low and stable bacillary counts without death of animals. Histological and immunological study showed granulomas and small patches of alveolitis, with high expression of tumour necrosis factor alpha (TNFalpha), inducible nitiric oxide synthase (iNOS), interleukin 2 (IL-2) and interferon gamma (IFN). In contrast, the intratracheal instillation of high numbers of bacteria (1 x 10(6)) produced progressive disease. These animals started to die after 2 months of infection, with very high bacillary loads, massive pneumonia, failing expression of TNF-alpha and iNOS, and a mixed Th1/M2 cytokine pattern. In situ PCR to detect mycobacterial DNA revealed that the most common positive cells in latently-infected mice were alveolar and interstitial macrophages located in tuberculous lesions, but, as in latently-infected human lung, positive signals were also seen in bronchial epithelium, endothelial cells and fibroblasts from histologically-normal areas. Our results suggest that latent tuberculosis is induced and maintained by a type 1 cytokine pattern plus TNFalpha, and that mycobacteria persist intracellularly in lung tissue with and without histological evidence of a local immune response MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 25 U4 - Immunology U5 - J;Article AV - English IS - 0009-9104 UR - ISI:000177079400005 L2 - latent tuberculosis;cytokines;in situ PCR;MYCOBACTERIUM-TUBERCULOSIS; EXPERIMENTAL-MODELS; MICE; DISEASE; CELLS; ALPHA; MACROPHAGES; PERSISTENCE; SITUATION; TISSUE SO - Clinical and Experimental Immunology 2002 ;128(2):229-237 4759 UI - 8130 AU - Artico G AU - Marconi U AU - Pelant J AU - Rotter L AU - Tkachenko M AD - Univ Padua, Dipartimento Matemat Pura & Applicata, I-35131 Padua, ItalyAcad Sci Czech Republ, Inst Math, CR-11567 Prague 1, Czech RepublicUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, Mexico TI - Selections and suborderability AB - We extend van Mill-Wattel's results and show that each countably compact completely regular space with a continuous selection on couples is suborderable. The result extends also to pseudocompact spaces if they are either scattered, first countable, or connected. An infinite pseudocompact topological group with such a continuous selection is homeomorphic to the Cantor set. A zero-selection is a selection on the hyperspace of closed sets which chooses always an isolated point of a set. Extending Fujii-Nogura results, we show that an almost compact space with a continuous zero-selection is homeomorphic to some ordinal space, and a (locally compact) pseudocompact space with a continuous zero-selection is an (open) subspace of some space of ordinals. Under the Diamond Principle, we construct several counterexamples, e.g. a locally compact locally countable monotonically normal space with a continuous zero-selection which is not suborderable MH - Czech Republic MH - Italy MH - Mexico|Distrito Federal PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0016-2736 UR - ISI:000183832100001 L2 - (weak) selection;countably compact;pseudocompact;(sub)orderable;topological group;scattered space;Vietoris topology;Fell topology;ordinal space;TOPOLOGICAL-GROUPS; ORDERABILITY; SPACES; COMPACTIFICATIONS SO - Fundamenta Mathematicae 2002 ;175(1):1-33 4760 UI - 10535 AU - Arzate H AU - Jimenez-Garcia LF AU - varez-Perez MA AU - Landa A AU - Bar-Kana I AU - Pitaru S AD - UNAM, Fac Odontol, Lab Biol Celular & Mol, Div Estudios Posgrado & Invest, Mexico City 04510, DF, MexicoUNAM, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoTel Aviv Univ, Maurice & Gabriela Goldschleger Sch Dent Med, IL-69978 Tel Aviv, IsraelArzate, H, UNAM, Fac Odontol, Lab Biol Celular & Mol, Div Estudios Posgrado & Invest, Cd Univ, Mexico City 04510, DF, Mexico TI - Immunolocalization of a human cementoblastoma-conditioned medium-derived protein AB - Little is known about the molecular mechanisms that regulate the cementogenesis process, because specific cementum markers are not yet available. To investigate whether a cementoblastoma-conditioned medium-derived protein (CP) could be useful as a cementum biological marker, we studied its expression and distribution in human periodontal tissues, human periodontal ligament, alveolar bone, and cementoblastoma-derived cells. In human periodontal tissues, immunoreactivity to anti-CP was observed throughout the cementoid phase of acellular and cellular cementum, cementoblasts, cementocytes, cells located in the endosteal spaces of human alveolar bone, and in cells in the periodontal ligament located near the blood vessels. Immunopurified CP promoted cell attachment on human periodontal ligament, alveolar bone-derived cells, and gingival fibroblasts. A monoclonal antibody against bovine cementum attachment protein (CAP) cross-reacted with CP. These findings indicate that CP identifies potential cementoblast progenitor cells, is immunologically related to CAP species, and serves as a biological marker for cementum MH - Israel MH - Mexico|Distrito Federal PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 6 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-0345 UR - ISI:000177201300010 L2 - cementoblasts;cementum protein;periodontium;ATTACHMENT PROTEIN; PERIODONTAL-LIGAMENT; HUMAN CEMENTUM; IN-VITRO; CELL-POPULATIONS; ROOT SURFACES; FORMING CELLS; TUMOR-CELLS; CEMENTOGENESIS; EXPRESSION SO - Journal of Dental Research 2002 ;81(8):541-546 4761 UI - 8638 AU - Ascanio G AU - Carreau PJ AU - Brito-De la Fuente E AU - Tanguy PA AD - Ecole Polytech, Dept Chem Engn, Ctr Appl Res Polymers, Montreal, PQ H3C 3A7, CanadaNatl Autonomous Univ Mexico, Fac Chem, Mexico City 04510, DF, MexicoCarreau, PJ, Ecole Polytech, Dept Chem Engn, Ctr Appl Res Polymers, POB 6079, Montreal, PQ H3C 3A7, Canada TI - Orifice flowmeter for measuring extensional rheological properties AB - Extensional rheological properties play an important role in processes in which the fluid is subjected to highly decelerated or accelerated flows. This paper describes an orifice flowmeter used to measure extensional properties of rheologically complex fluids at high strain rates. The operating principle of the flowmeter is based on the pressure drop due to the flow through a small size orifice. The flowmeter was first calibrated, by plotting the pressure drop-flow rate curve of the orifice, in terms of a dimensionless Euler number versus Reynolds number. Newtonian fluids consisting of aqueous solutions of corn syrup were used as calibration fluids. The calibration curve was then used to determine the apparent extensional viscosity of three different paper coating colors. The shear viscosity in terms of the Trouton ratio. The Trouton ratio for one coating color is shown to exceed considerably the theoretical value of 3 expected for Newtonian fluids MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: CANADIAN SOC CHEMICAL ENGINEERING RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0008-4034 UR - ISI:000182518900022 L2 - orifice flow meter;elongational viscosity;extensional properties;coating color;Euler number;VISCOSITY MEASUREMENTS; CONVERGING FLOW; CONTRACTION; FLUIDS SO - Canadian Journal of Chemical Engineering 2002 ;80(6):1189-1196 4762 UI - 9310 AU - Ascanio G AU - Brito-Bazan M AU - Brito-De la Fuente E AU - Carreau PJ AU - Tanguy PA AD - Ecole Polytech, Dept Chem Engn, CRASP, Montreal, PQ H3C 3A7, CanadaNatl Autonomous Univ Mexico, Fac Chem, Food Sci & Biotechnol Dept, Mexico City 04510, DF, MexicoTanguy, PA, Ecole Polytech, Dept Chem Engn, CRASP, POB 6079, Montreal, PQ H3C 3A7, Canada TI - Unconventional configuration studies to improve mixing times in stirred tanks AB - Dynamic perturbations and off-centered single and dual mixing impeller configurations have been investigated to reduce mixing time with viscous fluids. Mixing times, measured with a color-discoloration technique based on a fast acid-base reaction, reveal the presence of both segregated and dead zones A statistical design approach has been used to evaluate the effect of the impeller position as well as the dynamic conditions. Homogenization, is significantly enhanced when a radial flow impeller is used under both off-centered and dynamic perturbation conditions. In the case of an axial flow impeller, a combination of long clockwise times and short counter-clockwise times give better mixing, times. An enhanced homogenization is also observed-when a dual impeller configuration is used MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: CANADIAN SOC CHEMICAL ENGINEERING RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0008-4034 UR - ISI:000180720800003 L2 - non-symmetric geometry conditions;dynamic perturbations;mixing times;dual impeller configuration;CHAOTIC FLOWS; ADVECTION; VESSELS SO - Canadian Journal of Chemical Engineering 2002 ;80(4):558-565 4763 UI - 11128 AU - Ascencio JA AU - Mendoza M AU - Santamaria T AU - Perez M AU - Nava I AU - Gutierrez-Wing C AU - Jose-Yacaman M AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Nacl Invest Nucl, Ocoyoacac 52045, MexicoInst Mexicano Petr, Programa Ductos, Mexico City 07730, DF, MexicoJose-Yacaman, M, Univ Texas, Dept Chem Engn, Austin, TX 78712, USA TI - Structural instabilities in passivated gold nanoclusters induced by electron irradiation AB - In the new nanotechnology devices design, the stability of the systems is very important, in the present work we report evidences of internal and external changes of nanoparticles passivated by thiol molecules when they are irradiated under a high flux of an electron beam in the transmission electron microscope. High Resolution images were digitized and processed in order to identify the contrast changes produced by the atomic inside the nanoparticles. Fcc and decahedral nanoparticles cases are shown. Molecular dynamics calculations are also included in order to compare the experimental evidences with the cluster conditions of stabilities. Both theoretical and experimental results imply the occurrence of atomic and twining movements, and indicate that the n-alkyl thiol molecules prevent atomic movement and changes on the particle structure are not observed MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1040-7278 UR - ISI:000175715300002 L2 - nanoparticles structure;decahedral clusters;structural fluctuations;SMALL PARTICLES; MICROSCOPE; CLUSTERS; NANOPARTICLES SO - Journal of Cluster Science 2002 ;13(2):189-197 4764 UI - 9760 AU - Asensio JL AU - Hidalgo A AU - Cuesta I AU - Gonzalez C AU - Canada J AU - Vicent C AU - Chiara JL AU - Cuevas G AU - Jimenez-Barbero J AD - CSIC, Inst Quim Organ, Madrid 28006, SpainCSIC, Inst Estruct Mat, Madrid, SpainCSIC, Ctr Invest Biol, Madrid, SpainUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoAsensio, JL, CSIC, Inst Quim Organ, Juan Cierva 3, Madrid 28006, Spain TI - Experimental evidence for the existence of non-exo-anomeric conformations in branched oligosaccharides: NMR analysis of the structure and dynamics of aminoglycosides of the neomycin family AB - It is commonly known that the exo-anomeric effect is a major factor governing the conformational behavior of naturally occurring oligosaccharides. Conformational flexibility in these molecules mainly concerns the aglycon psi angle since phi is restricted by this stereo-electronic effect. In fact, to the best of our knowledge no case of a natural glycoside adopting a non-exo-anomeric conformation in solution has yet been reported. With respect to the flexibility among naturally occurring carbohydrates, branched type oligosaccharides including sugar residues glycosidated at contiguous positions (such as blood type carbohydrate antigens Lewis X) have been considered as the paradigm of rigid saccharides-the rigidity being enhanced by van der Waals interactions. Herein, we demonstrate unambiguously that both common beliefs are not to be generalized. For example in neomycin B, a branched oligosaccharide antibiotic, a large number of non-exo-anomeric conformations was detected in solution for the first time in naturally occurring sugars. This unusual behavior is attributed to branching. Here, polar contacts. between non-vicinal sugar units lead to an enhanced flexibility of the ribose glycosidic torsion phi. The influence of sugar flexibility on RNA recognition will also be discussed MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0947-6539 UR - ISI:000179437700021 L2 - anomeric effect;antibiotics;molecular dynamics;molecular recognition;NMR spectroscopy;30S RIBOSOMAL-SUBUNIT; MOLECULAR-DYNAMICS; GLYCOSIDIC LINKAGE; RNA; RECOGNITION; SIMULATIONS; ANTIBIOTICS; RESTRAINTS; CONFORMER SO - Chemistry-A European Journal 2002 ;8(22):5228-5240 4765 UI - 10035 AU - Asensio N AU - Gomez-Marin F AD - Univ Veracruzana, Inst Neuroetol, Catemaco 95870, Veracruz, MexicoAsensio, N, Norberto Asensio Anboto 4,1F, Durango 48200, Spain TI - Interspecific interaction and predator avoidance behavior in response to tayra (Eira barbara) by mantled howler monkeys (Alouatta palliata) AB - This paper reports the response of one howler monkey group (Alouatta palliata) to a group of potential predators, the tayra (Eira barbara). The apparently successful predator avoidance behavior of the monkeys was recorded in detail. We observed a group of four adult tayras moving around the Alouatta group displaying a species-typical aggressive behavioral pattern. The two adult females of the howler group successfully chased the tayras away by repeatedly moving closer to the mustelids and even following them until the predators moved off MH - Mexico|Veracruz MH - Spain PB - TOKYO: SPRINGER-VERLAG TOKYO RP - NOT IN FILE U3 - TC 7 U4 - Zoology U5 - J;Article AV - English IS - 0032-8332 UR - ISI:000178681100007 L2 - howler monkey;Alouatta palliata;tayra;Eira barbara;interspecific interaction;predation SO - Primates 2002 ;43(4):339-341 4766 UI - 11514 AU - Assaoui F AU - Pereyra P AD - Univ Mohammed 5, Dept Phys, Fac Sci, Rabat, MoroccoUAM Azcapotzalco, Dept Ciencias Basicas, Mexico City 02200, DF, MexicoAssaoui, F, Univ Mohammed 5, Dept Phys, Fac Sci, Av Ibn Battouta,BP 1014, Rabat, Morocco TI - Charge polarization effects and hole spectra characteristics in AlxGa1-xN/GaN superlattices AB - We study the effects of charge polarization on the extended physical properties of superlattices, such as transmission coefficients and valence band structure. We consider both linear and parabolic modulation of the band edge. Based on the theory of finite periodic systems, analytic expressions and high precision calculations of the relevant physical quantities for n-cell systems are obtained. Well-known features of these systems are identified. Besides the well-known energy band structure, we have also the field band structure, with interesting characteristics. Wider field gaps at stronger internal electric fields and higher density of field bands for larger layer widths are some of these characteristics. Well defined level density asymmetries identify the minibands induced by charge polarization or the so-called quantum confining Stark effect. We present the n-cell transmission amplitudes, transmission coefficients and miniband structures for different values of the relevant parameters. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Morocco PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000174666600059 L2 - MOLECULAR-BEAM EPITAXY; TRANSPORT-PROPERTIES; GAN SO - Journal of Applied Physics 2002 ;91(8):5163-5169 4767 UI - 11604 AU - Assih EA AU - Ouattara AS AU - Thierry S AU - Cayol JL AU - Labat M AU - Macarie H AD - Univ Ouagadougou, Dept Biochim Microbiol, Fac Sci & Tech, Ouagadougou 03, Burkina FasoUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoInst Rech Dev, Mexico City 11530, DF, MexicoUniv Aix Marseille 1, Lab Microbiol IRD, IFR BAIM, F-13288 Marseille 9, FranceUniv Mediterranee, Lab Microbiol IRD, IFR BAIM, F-13288 Marseille 9, FranceOuattara, AS, Univ Ouagadougou, Dept Biochim Microbiol, Fac Sci & Tech, 03 BP 7021, Ouagadougou 03, Burkina Faso TI - Stenotrophomonas acidaminiphila sp nov., a strictly aerobic bacterium isolated from an upflow anaerobic sludge blanket (UASB) reactor AB - Two of several strictly aerobic, mesophilic bacteria isolated from a lab-scale upflow anaerobic sludge blanket (UASB) reactor treating a petrochemical wastewater, strains AMX 17 and AMX 19(T), were subjected to detailed taxonomic study. Cells were Gram-negative, motile, non-sporulating, straight to curved rods with a polar flagellum. The isolates exhibited phenotypic traits of members of the genus Stenotrophomonas, including cellular fatty acid composition and the limited range of substrates that could be used. Sugars and many amino acids were utilized. Antibiotic susceptibility and physiological characteristics were determined. The DNA base composition was 66.9 mol% G+C. Phylogenetic analysis revealed that the nearest relatives were Stenotrophomonas maltophilia LMG 11114, Stenotrophomonas nitritireducens DSM 12575(T) and Pseudomonas pictorum ATCC 23328(T) (similarity of 98.1-98.8%). Xanthomonas species, S. maltophilia LMG 958(T) and Stenotrophomonas africana CIP 104854(T) showed high 16S rRNA sequence similarities (96.4-97.3%). The high similarity found in cellular fatty acid profiles and identical partial 165 rRNA sequences (500 bp) for strains AMX 17 and AMX 19T indicate that they belong to the same species. DNA-DNA hybridizations revealed respectively 26.7, 31, 65.8 and 43.6% homology between isolate AMX 19T and S. africana CIP 104854(T), S. maltophilia CIP 60.77(T), S. nitritireducens DSM 12575(T) and P. pictorum ATCC 23328T. These results allow the proposal of strain AMX 19(T) (= DSM 13117(T) = ATCC 700916(T) = CIP 106456(T)) as representative of a novel species of the genus Stenotrophomonas, with the name Stenotrophomonas acidaminiphila sp. nov MH - Burkina Faso MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 19 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000174516900029 L2 - polyphasic taxonomy;cellular fatty acids;amino acids;anaerobic reactor;Xanthomonas;ACID METHYL-ESTERS; XANTHOMONAS-MALTOPHILIA; HETEROTROPHIC BACTERIA; RENATURATION RATES; DNA HYBRIDIZATION; GENUS XANTHOMONAS; IDENTIFICATION; BIODEGRADATION; RHIZOSPHERE; BIOFILTERS SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():559-568 4768 UI - 10633 AU - Atakishiyev NM AU - Klimyk AU AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoInst Theoret Phys, UA-03143 Kiev, UkraineAtakishiyev, NM, UNAM, Inst Matemat, Apartado Postal 373-3, Cuernavaca 62210, Morelos, Mexico TI - Diagonalization of operators and one-parameter families of nonstandard bases for representations of su(q)(2) AB - Nonstandard bases for finite dimensional irreducible representations of the quantum algebra su(q)(2) are constructed by diagonalizing one-parameter families of the operators q(J3/4)(J(+) + J(-))q(J3/4) + cq(J3) and iq(J3/4) (J(+) - J(-))q(J3/4) + cq(J3), c is an element of R. We derive explicit expressions for the eigenfunctions and the corresponding eigenvalues of these operators in an arbitrary irreducible representation of su(q)(2). It is shown that the matrix elements of the intertwining operator A(j)(c), which is a q-extension of the classical su(2)-operator a(j), J(1)a(j) = a(j)J(3), are expressed in terms of the dual q-Krawtchouk polynomials. Diagonalization of some other operators, associated with the dual q-Hahn polynomials, is also examined MH - Mexico|Morelos MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000177080500008 L2 - QUANTUM; SUQ(2) SO - Journal of Physics A-Mathematical and General 2002 ;35(25):5267-5278 4769 UI - 11013 AU - Attiya H AU - Rajsbaum S AD - Technion Israel Inst Technol, Dept Comp Sci, IL-32000 Haifa, IsraelUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMIT, Comp Sci Lab, Cambridge, MA 02139, USAAttiya, H, Technion Israel Inst Technol, Dept Comp Sci, IL-32000 Haifa, Israel TI - The combinatorial structure of wait-free solvable tasks AB - This paper presents a self-contained study of wait-free solvable tasks. A new necessary condition for wait-free solvability, based on a restricted set of executions, is proved. This set of executions induces a very simple-to-understand structure, which is used to prove tight bounds for k-set consensus and renaming. The framework is based on topology, but uses only elementary combinatorics, and, in contrast to previous works, does not rely on algebraic or geometric arguments MH - Israel MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0097-5397 UR - ISI:000175899100013 L2 - distributed systems;shared memory systems;atomic read/write registers;combinatorial topology;wait-free solvable tasks;consensus;set consensus;renaming;AGREEMENT; ALGORITHMS; CONSENSUS; FAULTS SO - Siam Journal on Computing 2002 ;31(4):1286-1313 4770 UI - 11665 AU - Avallone S AU - Brillouet JM AU - Guyot B AU - Olguin E AU - Guiraud JP AD - Univ Montpellier 2, USTL Lab GBSA MBI CC 23, F-34095 Montpellier 5, FranceCIRAD FLHOR, F-34032 Montpellier, FranceCIRAD CP, F-34032 Montpellier, FranceInst Ecol, Xalapa, Veracruz, MexicoGuiraud, JP, Univ Montpellier 2, USTL Lab GBSA MBI CC 23, Pl Eugene Bataillon, F-34095 Montpellier 5, France TI - Involvement of pectolytic micro-organisms in coffee fermentation AB - During the fermentation of Coffea arabica L., the most frequently found pectolytic bacteria were Erwinia herbicola and Klebsiella pneumoniae. These micro-organisms produce pectatelyase which is unable to depolymerize esterified pectins of mucilage without previous de-esterification. Furthermore, the optimal activities are observed at pH 8.5 whereas fermentation conditions are acidic (5.3-3.5). The major lactic acid bacteria, Leuconostoc mesenteroides, do not produce pectolytic enzymes. Only a Lactobacillus brevis strain, rarely isolated with a low frequency, shows a polygalacturonase activity compatible with fermentation conditions. Mucilage decomposition seems to be correlated to acidification and not to enzymatic pectolysis. Inoculation with pectolytic micro-organisms allows microbiological control of the fermentation but does not speed up the process. It would be preferable to use lactic acid bacteria so that the pH remained as close as possible to natural fermentation, where acidification is important. This practice would standardize the coffee fermentation microflora and therefore control the end product quality MH - France MH - Mexico|Veracruz PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0950-5423 UR - ISI:000174218400009 L2 - coffee fermentation;mucilage degradation;pectinase;pectolytic bacteria;wet process;LACTOBACILLUS-PLANTARUM; ERWINIA-CHRYSANTHEMI; POLYGALACTURONASE; PURIFICATION; DEGRADATION; STRAINS; ACID SO - International Journal of Food Science and Technology 2002 ;37(2):191-198 4771 UI - 9896 AU - Avila O AU - Rodriguez-Villafuerte M AU - Gamboa-deBuen I AU - Aviles P AU - Estrada D AU - Buenfil AE AU - Ruiz-Trejo C AU - Gonzalez P AU - Brandan ME AU - Horowitz YS AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoBen Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelNatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoAvila, O, Inst Nacl Invest Nucl, AP 18-1027, Mexico City 11801, DF, Mexico TI - On the correct measurement of relative heavy charged particles to gamma thermoluminescent efficiencies AB - In order to better understand the most important experimental aspects for performing correct measurements of relative thermoluminescent (TL) efficiencies, an investigation has been carried out to quantify the effect of using different experimental procedures in the evaluation of 3 MeV proton-to-gamma relative efficiency (eta(p,gamma)) of LiF:Mg,Ti. Variations in batch, presentation, annealing and reader have been studied. When the same protocol is used to measure proton and gamma TL response, efficiency values obtained range from 0.36 to 0.59 for peak 5 and from 0.44 to 0.79 for the total signal. The use of different annealings and different batches leads to 20% and 10% differences in eta(p,gamma), respectively. Large differences (40%) are found between efficiency values measured with TLD-100 chips and those obtained using TLD-100 microcubes. When 'mixed' procedures are used to measure the proton and the gamma response, differences in eta(p,gamma), may increase even more. The main conclusion of this work is to stress the importance of measuring an entire series of experiments in the same laboratory with a carefully defined protocol and using dosemeters from the same batch to obtain heavy charged particle TL response and gamma TL response with identical annealing and readout procedures MH - Israel MH - Mexico|Distrito Federal PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899600015 L2 - TL RESPONSE; MEV PROTONS; TLD-100; SUPRALINEARITY; LIF-MG,TI SO - Radiation Protection Dosimetry 2002 ;100(1-4):87-90 4772 UI - 9844 AU - Ayala A AU - Amore P AU - Aranda A AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Colima, Fac Ciencias, Colima 28045, MexicoBoston Univ, Dept Phys, Boston, MA 02215, USAAyala, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Pion dispersion relation at finite density and temperature AB - We study the behavior of the pion dispersion relation in a pion medium at finite density and temperature. We introduce a pion chemical potential to describe the finite pion number density and argue that such description is valid during the hadronic phase of a relativistic heavy-ion collision between chemical and thermal freeze-out. We make use of an effective Lagrangian that explicitly respects chiral symmetry through the enforcement of the chiral Ward identities. The pion dispersion relation is computed through the computation of the pion self-energy in a nonperturbative fashion by giving an approximate solution to the Schwinger-Dyson equation for this self-energy. The dispersion relation is described in terms of a density and temperature dependent mass and an index of refraction which is also temperature, density, as well as momentum dependent. The index of refraction is larger than unity for all values of the momentum for finite mu and T. We conclude by exploring some of the possible consequences for the propagation of pions through the boundary between the medium and vacuum MH - Mexico|Colima MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000179103500068 L2 - NUCLEUS-NUCLEUS COLLISIONS; LINEAR SIGMA-MODEL; EQUILIBRATION; PROPAGATION; MATTER SO - Physical Review C 2002 ;66(4): 4773 UI - 9930 AU - Ayala L AU - Henry M AU - van Ginkel M AU - Singh R AU - Keller B AU - Khairallah M AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandHenry, M, CIMMYT, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Identification of QTLs for BYDV tolerance in bread wheat AB - We searched for QTLs involved in tolerance to barley yellow dwarf (BYD), a serious viral disease of small grain cereals in two wheat populations, Opata x Synthetic (ITMI) and Frontana x INIA66 (F x I), for which marker data had previously been generated. The populations were evaluated in replicated field trials under artificial inoculation with a BYDV-PAV-Mex isolate and under disease-free conditions. Disease symptoms (yellowing, dwarfism and biomass reduction) were visually recorded and agronomic traits (number of tillers, height, biomass, yield and thousand-kernel weight) were measured on five plants per plot. Phenotypic data on all evaluated traits showed normal distribution with high correlation between visual estimates and measured values. Heritabilities were mostly moderate to high in the 114 lines of the ITMI population, and from low to moderate in the 117 lines of the F x I population. QTL analyses were based on genetic maps containing 443 loci for the ITMI population and 317 loci for the F x I population. Using composite interval mapping, 22 QTLs in the ITMI population and seven in the F x I population were detected, explaining 9.8-43.3% of total phenotypic variation (sigma(P)(2)) per agronomic trait in the first population, and 4.1-13.7% in the second. Individual QTLs explained less than 15.8% of sigma(P)(2). In the F x I population a minor QTL explaining 7% of sigma(P)(2) for yellowing was detected on the short arm of 7D, linked to leaf tip necrosis, a morphological marker for linked genes Bdv1, Yr18 and Lr34. A QTL consistently detected for several traits on 2D in the ITMI population and on the short arm of group 6 chromosome (6S) in F x I explained 10-15% of sigma(P)(2). The large number of QTLs having mostly small effects and the continuous distribution of all evaluated traits confirmed the polygenic nature and complexity of BYD tolerance in wheat MH - Mexico|Distrito Federal MH - Switzerland PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000178930200012 L2 - barley yellow dwarf;BYDV;Bdv1;quantitative trait loci;virus tolerance;wheat;YELLOW DWARF VIRUS; QUANTITATIVE TRAIT LOCI; LEAF RUST RESISTANCE; THINOPYRUM-INTERMEDIUM; GENETIC-ANALYSIS; WINTER-WHEAT; BARLEY; OAT; REGISTRATION; CEREALS SO - Euphytica 2002 ;128(2):249-259 4774 UI - 9697 AU - Ayala R AU - Martinez JM AU - Pappalardo RR AU - Saint-Martin H AU - Ortega-Blake I AU - Marcos ES AD - Univ Sevilla, Dept Quim Fis, E-41012 Seville, SpainUniv Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAyala, R, Univ Sevilla, Dept Quim Fis, E-41012 Seville, Spain TI - Development of first-principles interaction model potentials. An application to the study of the bromide hydration AB - This work presents the development of first-principles bromide ion-water interaction potentials using the mobile charge density in harmonic oscillators-type model. This model allows for a flexible and polarizable character of the interacting molecules and has already been parametrized for water-water interactions. The prospected potential energy surfaces of the bromide ion-water system were computed quantum-mechanically at Hartree-Fock and Moller-Plesset second-order perturbation levels. In addition to the ion-solvent molecule pair, structures formed by the anion and two or three water molecules were considered in order to include many body effects. Minimizations of hydrated bromide clusters in gas phase [Br(H2O)(n)](-) (n=1-6,10,15,20) and Monte Carlo computations of bromide aqueous solutions were performed to test the new potentials. Both structural and thermodynamic properties have been studied in detail and compared to the available experimental and theoretical values. From these comparisons, it was concluded the importance of including basis set superposition error corrections for the two-body interactions, and the small role of both electron correlation on the three-body terms and the four-body terms. Monte Carlo simulation results have also been used to investigate if the presence of the anion significantly affects the intramolecular geometry of the water molecules and the degree of disruption of the water solvent structure in its vicinity.(C) 2002 American Institute of Physics MH - Mexico|Morelos MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 20 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Review AV - English IS - 0021-9606 UR - ISI:000179495000012 L2 - MOLECULAR-DYNAMICS SIMULATIONS; ABSORPTION FINE-STRUCTURE; FLUORIDE-WATER CLUSTERS; MONTE-CARLO SIMULATIONS; AQUEOUS IONIC CLUSTERS; X = F; AB-INITIO; COMPUTER-SIMULATIONS; POLARIZABLE WATER; FREE-ENERGY SO - Journal of Chemical Physics 2002 ;117(23):10512-10524 4775 UI - 9452 AU - Ayeneh A AU - van Ginkel M AU - Reynolds MP AU - Ammar K AD - CIMMYT, Mexico City 06600, DF, MexicoSeed & Plant Improvement Inst, Karaj 31585, Iranvan Ginkel, M, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Comparison of leaf, spike, peduncle and canopy temperature depression in wheat under heat stress AB - This study examines genotype X organ-temperature depression (TD) interactions and whether differences in plant morphology influence organ-TD and its correlation with canopy temperature depression (CTD) and grain yield. Field experiments were conducted with 13 spring wheat genotypes planted on three dates in the 2000-2001 winter cropping cycle in NW Mexico. Surface temperatures of flag leaves, peduncles, spikes and canopy were measured with a hand-held infrared thermometer. Morphological and yield components were also measured. Results indicated that there is genetic variability for organ-TD. CTD showed strong positive correlations with organ-TD and grain yield. Organ-TD and CTD were positively correlated with leaf area index, and CTD was probably little affected by leaf rolling. Spike temperature was generally higher than leaf temperature, but lower than ambient air temperature. The interactions between grain yield and spike-TD and CTD were not significant. Results of this study indicate that CTD does not mask confounding interactions between organ temperatures and thus can be used reliably to measure TD during grain filling under heat stress conditions. (C) 2002 Elsevier Science B.V. All rights reserved MH - Iran MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000180281700006 L2 - canopy temperature depression;heat stress;wheat;GENOTYPIC VARIATION; GRAIN-YIELD; PHOTOSYNTHESIS; CULTIVARS; DROUGHT; GROWTH; EARS; RICE; HOT; TRANSPIRATION SO - Field Crops Research 2002 ;79(2-3):173-184 4776 UI - 10765 AU - az-Baez MC AU - Sanchez WA AU - Dutka BJ AU - Ronco A AU - Castillo G AU - Pica-Granados Y AU - Castillo LE AU - Ridal J AU - Arkhipchuk V AU - Srivastava RC AD - Natl Univ Colombia, Fac Engn, Bogota, ColombiaInt Dev Res Ctr, Ottawa, ON, CanadaEnvironm Canada, Natl Water Res Inst, Burlington, ON, CanadaNatl Univ La Plata, Fac Sci, La Plata, ArgentinaUniv Chile, Dept Civil Engn, Santiago, ChileMexican Inst Water Technol, Cuernavaca, Morelos, MexicoNatl Univ, Cent Amer Inst Studies Tox Substances, IRET, Heredia, Costa RicaSt Lawrence River Inst Environm Sci, Cornwall, ON, CanadaUkrainian Acad Sci, Inst Colloid Chem & Water Chem, Kiev, UkraineAll India Inst Hyg & Publ Hlth, Calcutta, W Bengal, IndiaDiaz-Baez, MC, Natl Univ Colombia, Fac Engn, Bogota, Colombia TI - Overview of results from the WaterTox intercalibration and environmental testing phase II program: part 2, ecotoxicological evaluation of drinking water supplies AB - Because of rapid population growth, industrial development, and intensified agricultural production increasing amounts of chemicals are being released into the environment, polluting receiving water bodies around the world. Given the potential health risk associated with the presence of toxicants in water sources used for drinking yet the scarcity of available data, there is a need to evaluate these waters and develop strategies to reduce and prevent their contamination. The present study examined the applicability of a battery of simple, inexpensive bioassays in environmental management and the relevance of the test results in establishing the toxicological quality of water sources and drinking water within the framework of the eight-country WaterTox Network, sponsored by the International Development Research Centre, Ottawa, Canada. Seventy-six samples were collected from surface and groundwater sources and seven samples from drinking water treatment plants. Each sample was tested with a core battery of bioassays (Daphnia magna, Hydra attenuata, and Lactuca sativa root inhibition tests) and a limited set of physical and chemical parameters. In addition, three labs included the Selenastrum capricornutum test. When no toxic effects were found with the battery, samples were concentrated 10x using a solid-phase extraction (SPE) procedure. Nonconcentrated natural water samples produced a toxic response in 24% of cases with all three core bioassays. When all bioassays are considered, the percentage of raw samples showing toxicity with at least one bioassay increased to 60%. Of seven treated drinkingwater samples, four showed toxicity with at least one bioassay, raising the possibility that treatment processes in these instances were unable to remove toxic contaminants. The Daphnia magna and Hydra attenuata tests indicated a high level of sensitivity overall. Although only three of the eight countries used S. capricornutum, it proved to be an efficient and reliable bioassay for toxicity assessment. (C) 2002 Wile Periodicals. Inc MH - Argentina MH - Canada MH - Chile MH - Colombia MH - Costa Rica MH - India MH - Mexico|Morelos MH - Ukraine PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Toxicology;Water Resources U5 - J;Article AV - English IS - 1520-4081 UR - ISI:000176717400011 L2 - water;water quality;toxicity testing;Daphnia;Hydra;Lactuca;Selenastrum;Raphidocelus subcapitata;developing countries;pollutants;bioassays;ACUTE TOXICITY; ASSAY SO - Environmental Toxicology 2002 ;17(3):241-249 4777 UI - 10707 AU - az-Ballote L AD - IPN, CINVESTAV, Unidad Merida, Dept Appl Phys, Merida 97310, Yuc, MexicoDiaz-Ballote, L, Mississippi State Univ, Dept Chem, Hand Lab, POB 9573, Mississippi State, MS 39762 USA TI - A cell holder for simultaneous in-situ X-ray diffraction and electrochemical studies: Part 1 - Zinc in a sodium chloride solution AB - A novel device (cell holder) to carry out electrochemical characterization simultaneously in-situ with x-ray analysis is presented. The cell holder can be mounted in most diffractometers found in conventional research laboratories. This device can be used for a number of applications in different areas of electrochemistry such as electroplating, corrosion, and batteries. A typical example related to corrosion is demonstrated by studying the corrosion product format ion on Zn immersed in 0.1 M sodium chloride (NaCl; pH 7.4). The x-ray diffraction patterns obtained show that it is possible to follow in-situ the Sequence of formation of an oxide-chloride layer as a function of time. Some particular advantages for using this cell holder are that the cell holder does not use any window that, can contribute to unwanted peaks; it does not need any special camera and is open to air to simulate a real corrosion process; and it does not need special radiation such as synchrotron radiation MH - Mexico|Yucatan MH - USA PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000176920500007 L2 - atmospheric corrosion;electrochemical cell;in situ measurements;passivation;simonkolleite;x-ray diffraction;zinc;CORROSION; DIFFRACTOMETRY; COPPER SO - Corrosion 2002 ;58(2):132-136 4778 UI - 11445 AU - az-Barriga-Arceo L AU - Orozco E AU - Tsuchiya K AU - Umemoto M AU - Lopez-Hirata VM AD - ESIQIE IPN, Inst Politecn Nacl, Mexico City 07300, DF, Mexico. Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico. Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 441, Japan TI - Effect of sintering conditions on the martensitic transformation in a MA and SPS sintered Cu-50 at.% Co alloy AB - The martensitic transformation was studied in a mechanically alloyed and then spark plasma sintered Cu-50 at.% Co alloy. The mechanical alloying of this alloy composition produced the formation of a supersaturated solid solution with nanometric grains. The martensite start temperature was determined to be below room temperature by means of electrical resistance measurements during cooling of sintered samples. The martensite start temperature decreased with the copper addition, compared to that of pure cobalt. Additionally, this temperature also decreased as the sintering pressure increased MH - Japan MH - Mexico|Distrito Federal T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBT98Y AV - English IS - 0255-5476 UR - ISI:000174657900021 L2 - Cu-Co alloys;martensitic transformation;mechanical alloying (MA) SO - 2002 ;():147-152 4779 UI - 11380 AU - az-Cruz L AU - Murayama H AU - Pierce A AD - Univ Calif Berkeley, Lawrence Berkeley Lab, Theory Grp, Berkeley, CA 94720, USABUAP, Inst Fis, Puebla, MexicoUniv Calif Berkeley, Dept Phys, Berkeley, CA 94720, USADiaz-Cruz, L, Univ Calif Berkeley, Lawrence Berkeley Lab, Theory Grp, Berkeley, CA 94720 USA TI - Can supersymmetric loops correct the fermion mass relations in SU(5)? AB - We investigate possibilities for improving the fermion mass relations that arise in grand unified theories (GUTs). Each scenario relies on supersymmetric loop effects alone, without modifying the naive Yukawa unification. We briefly review the case where A terms follow the usual proportionality condition. In this case SUSY effects cannot completely improve the mass relations. Secondly, we employ a new ansatz for the trilinear A terms that satisfies all experimental and vacuum stability bounds, and can successfully modify the mass relations. Finally, we investigate the use of general (nonproportional) A terms, which can contain large off-diagonal entries. In this case, flavor changing neutral current (FCNC) data present an important constraint, but remedying the mass relations appears possible. We do not pretend to present a complete, motivated theory of fermion masses. Rather this paper can be viewed as an existence proof, serving to show that Yukawa coupling unification can occur even within the framework of minimal GUTs MH - USA MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000174980200032 L2 - ANOMALOUS U(1); STANDARD MODEL; BREAKING; SUPERGRAVITY; UNIFICATION; OPERATOR; PHYSICS; FLAVOR; MOMENT; DECAY SO - Physical Review D 2002 ;65(7): 4780 UI - 11040 AU - az-Garcia JA AU - Leiva-Sanchez V AU - Galea M AD - Univ Autonoma Agraria Antonio Narro, Dept Stat & Computat, Saltillo 25350, Coahuila, MexicoUniv Valparaiso, Dept Stat, Valparaiso, Chile TI - Singular elliptical distribution: Density and applications AB - The paper present an explicit expression for the density of a n-dimensional random vector with a singular Elliptical distribution. Based on this, the densities of the generalized Chi-squared and generalized t distributions are derived, examining the Pearson Type VII distribution and Kotz Type distribution (as specific Elliptical distributions). Finally, the results are applied to the study of the distribution of the residuals of an Elliptical linear model and the distribution of the t-statistic, based on a sample from an Elliptical population MH - Chile MH - Mexico|Coahuila PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0361-0926 UR - ISI:000175949800001 L2 - elliptical distributions;singular distribution;generalized non-central Chi-squared and t distributions;elliptical linear model;confidence intervals;the t-statistic SO - Communications in Statistics-Theory and Methods 2002 ;31(5):665-681 4781 UI - 10700 AU - az-Hernandez J AU - Lopez-Echarri A AU - Ruiz-Larrea I AU - Fraile-Rodriguez A AU - Breczewski T AD - Univ Autonoma Puebla, Fac Ciencias Fisicomatemat, Puebla 72000, MexicoUPV EHU, Fac Ciencias, Dept Fis Mat Condensada, Bilbao 48080, SpainUPV EHU, Fac Ciencias, Dept Fis Aplicada 2, Bilbao 48080, SpainDiaz-Hernandez, J, Univ Autonoma Puebla, Fac Ciencias Fisicomatemat, Apto 1152, Puebla 72000, Mexico TI - The heat capacity of 4-4 '-dichlorobenzophenone AB - The specific heat of 4,4'-dichlorobenzophenone has been measured by Adiabatic Calorimetry from 90 K to room temperature. As expected, two first order phase transitions were found at T-1 = 187 K and T-2 = 192 K, showing a noticeable thermal hysteresis of about 9degreesC, together with some thermal history effects. By means of a useful deconvolution of the specific heat curve, the values for the phase transition thermodynamic functions were obtained: DeltaH(1) = 39.6 J/mol, DeltaS(1) = 0.21 J/mol.K. DeltaH(2) = 467 J/mol, and DeltaS(2) = 2.41 J/mol.K MH - Mexico|Puebla MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000176861500055 L2 - specific heat;phase transitions;dichlorobenzophenone;4,4'-DICHLOROBIPHENYL SULFONE; PHASE-TRANSITIONS; 4,4'-DICHLOROBENZOPHENONE; CRYSTAL; NQR SO - Ferroelectrics 2002 ;268():753-758 4782 UI - 11481 AU - az-Olavarrieta C AU - Turner AN AU - Ellertson C AU - Helzner JF AU - Ezcurra E AD - Populat Council, Latin Amer & Caribbean Reg Off, Mexico City, DF, MexicoInt Planned Parenthood Federat, New York, NY, USAUNDP, UNFPA, World Bank, WHO,Special Programme Res Dev & Res Training Huma, Geneva, SwitzerlandEllertson, C, Populat Council, Latin Amer & Caribbean Reg Off, Mexico City, DF, Mexico TI - Policy climate, scholarship, and provision of emergency contraception at affiliates of the International Planned Parenthood Federation in Latin America and the Caribbean AB - Emergency contraception (EC) has great potential to decrease the incidence and resulting consequences of unwanted pregnancy, including unsafe abortion. We conducted this study to understand EC practices in Latin America and the Caribbean (LAC). We contacted 43 International Planned Parenthood Federation affiliates in LAC to interview them about EC availability. We collected family planning norms and researched registered EC products in LAC. We searched English- and Spanish-language sources to compile EC literature reviews. Thirty-seven affiliates (86%) responded to the survey, and 62% offer EC. Central and South American affiliates are more likely to offer EC than are Caribbean affiliates. Of those offering EC, 96% offer cut-up packets of oral contraceptives, whereas six affiliates offer dedicated products. Of those not offering EC, 79% believe it constitutes abortion. EC availability and support For the method appear to be increasing in LAC, and clearer distinctions between EC and abortion in medical and policy guidelines should increase acceptance further, (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000174844000004 L2 - emergency contraception;post-coital;dedicated products;Latin America;Caribbean;YUZPE REGIMEN SO - Contraception 2002 ;65(2):143-149 4783 UI - 9301 AU - az-Reval MI AU - Ventura-Martinez R AU - ciga-Campos M AU - Terron JA AU - Cabre F AU - Lopez-Munoz FJ AD - IPN, CINVESTAV, Dept Farmacobiol, Lab 7, Mexico City 14330, DF, MexicoIPN, CINVESTAV, Secc Externa Farmacol, Mexico City 14330, DF, MexicoMenarini Res, Barcelona, SpainLopez-Munoz, FJ, IPN, CINVESTAV, Dept Farmacobiol, Lab 7, Calz Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Involvement of serotonin mechanisms in the antinociceptive effect of S(+)-ketoprofen AB - Serotonin (5-hydroxytryptamine; 5-HT) plays a role in the modulation and processing of pain and evidence has been provided that some nonsteroidal anti-inflammatory drugs (NSAIDs) act, at least in part, through this system. The present study was designed to investigate the possible participation of 5-HT1, 5-HT2, 5-HT3, and 5-HT7 receptor subtypes in the antinociceptive effect of S(+)-ketoprofen (S-KP) at spinal and supraspinal level using the "pain induced functional impairment model in rat" (PIFIR model). S-KP was administered orally (p.o.) and antagonist drugs for 5-HT receptors (5-HT1/5-HT2, and 5-HT3) were administered intrathecally (i.t.) or intracerebroventricularly (i.c.v.) 15 min before S-KP. S-KP (3.4 mg/kg p.o.) produced a significant antinociceptive effect in this model. Pre-treatment with the 5-HT1/5-HT2/5-HT7 receptor antagonist, methiothepin (1.5 mug, i.c.v.), significantly reversed the antinociceptive effect of S-KP. In contrast, no significant differences were observed following i.t. administration of methiothepin. Pre-treatment i.t., but not i.c.v., with the 5-HT3/5-HT4 receptor antagonist, tropisetron (0.9 mug), on the other hand, significantly reversed S-KP-induced antinociception. These results indicate that serotonin mechanisms are involved in the antinociceptive effect of S-KP. 5-HT1/5-HT2/5-HT7 receptors participate at the supraspinal level and 5-HT3/5-HT4 receptors participate at spinal level. (C) 2003 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0272-4391 UR - ISI:000180768500005 L2 - antinociception;S(+)-ketoprofen;PIFIR model;analgesia;supraspinal;INDUCED FUNCTIONAL IMPAIRMENT; DEXKETOPROFEN TROMETAMOL; NITRIC-OXIDE; KETOPROFEN; PAIN; RAT; MODEL; CYCLOOXYGENASE; ENANTIOMERS; INHIBITION SO - Drug Development Research 2002 ;57(4):187-192 4784 UI - 10309 AU - Azcona LA AU - Gutierrez GEO AU - Fernandez CJP AU - Natera OM AU - Ruiz-Speare O AU - Ali J AD - Mil Hosp, Mexico City, DF, MexicoABC Med Ctr, Mexico City, DF, MexicoUniv Toronto, Dept Surg, Toronto, ON, CanadaAli, J, 55 Queen St E,Suite 402, Toronto, ON M5C, Canada TI - Attrition of Advanced Trauma Life Support (ATLS) skills among ATLS instructors and providers in Mexico AB - BACKGROUND: Mexico has had the Advanced Trauma Life Support (ATLS) program since 1986. We assessed the attrition of ATLS skills among ATLS providers and instructors in this country. STUDY DESIGN: Three groups (S, 16 students [new medical graduates enrolled for an ATLS course]; P, 33 providers; and 1, 26 instructors [who had completed courses previously]) were evaluated. Group S read the manual before pretesting. Groups P and I were subdivided based on the length of time since the course had been completed: P1, less than 2 years (n = 22); P2, more than 2 years (n = 11); 11, less than 2 years (n = 16); and 12, more than 2 years (n = 10). Multiple-choice and psychomotor testing using ATLS scoring criteria were used. Affect was assessed post-ATLS for motivational factors, interactivity, and attitude toward trauma care. RESULTS: Multiple-choice test scores (means +/- SD) out of a maximum of 40 were as follows: S, 24.3 +/- 2.6; P1, 24.0 +/- 5.7; P2, 21.3 +/- 8.0; I1, 23.2 +/- 8.2; and 12, 24.0 +/- 7.2. Group S all passed the post-ATLS multiple-choice test (with correct answer percentages of 60.3% +/- 6.6% pre-ATLS versus 88.8% +/- 5.6% post-ATLS). An ATLS passing score of 80% correct answers was achieved in 2 of 33 for group P and 8 of 26 for group I (p < 0.05), with no statistically significant differences between groups P1 and P2 or between groups 11 and 12. For the psychomotor skills testing component, 5 of 16 in the S group passed, 15 of 22 in PI passed, 9 of 11 in P2 passed, 14 of 16 in 11 passed, and 6 of 10 in 12 passed. The pass rate was significantly lower in the S pre-ATLS group than in the P and I groups (p < 0.05, Fisher's exact test). More than 60% preferred interactive components and enrolled for professional improvement, and more than 90% reported improved post-ATLS attitude to trauma care. CONCLUSIONS: Reading the manual alone yields similar cognitive but inferior psychomotor performance compared with subjects who completed the course previously. The majority of previous providers and instructors did not obtain a passing score (80%) in the multiple-choice test, but all the new providers passed the post-ATLS multiple-choice test, suggesting major attrition of cognitive skills but maintenance of psychomotor skills. Instructors had Superior cognitive performance versus providers with worsening performance over time, but clinical skills performance was maintained at an equally high level by all groups. A very positive attitude toward ATLS prevailed among all participants. (C) 2002 by the American College of Surgeons MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Surgery U5 - J;Article AV - English IS - 1072-7515 UR - ISI:000177875700011 L2 - SENIOR MEDICAL-STUDENTS; DEVELOPING-COUNTRY; MANAGEMENT-SKILLS; PROGRAM SO - Journal of the American College of Surgeons 2002 ;195(3):372-377 4785 UI - 9977 AU - Azua BM AU - DeMets C AU - Masterlark T AD - Univ Guadalajara, Dept Geog & Ordenac Terr, Guadalajara, Jalisco, MexicoUniv Wisconsin, Dept Geol & Geophys, Madison, WI 53706, USARaytheon ITSS Corp, EROS Data Ctr, US Geol Survey, Sioux Falls, SD 57198, USAAzua, BM, Univ Guadalajara, Dept Geog & Ordenac Terr, Av Maestros & Mariano Barcena,Planta Alta, Guadalajara, Jalisco, Mexico TI - Strong interseismic coupling, fault afterslip, and viscoelastic flow before and after the Oct. 9, 1995 Colima-Jalisco earthquake: Continuous GPS measurements from Colima, Mexico AB - [1] Continuous GPS measurements from Colima, Mexico during 4/93-6/01, bracketing the Oct. 9, 1995 M = 8.0 Colima-Jalisco earthquake, provide new constraints on Rivera plate subduction mechanics. Modeling of margin-normal strain accumulation before the earthquake suggests the Rivera-North America subduction interface was fully locked. Transient postseismic motion from 10/95-6/97 is well fit by a model that includes logarithmically-decaying fault afterslip, elastic strain from shallow fault relocking, and possibly a minor viscoelastic response, but is fit poorly by models that assume a dominant Maxwell viscoelastic response of the lower crust and upper mantle, independent of the assumed viscosities. Landward, margin-normal motion since mid-1997 is parallel to but similar to75% slower than the pre-seismic velocity. Afterslip alone fails to account for this slowdown. The viscoelastic response predicted by a FEM correctly resolves the remaining velocity difference within the uncertainties. Both processes thus offset elastic strain accumulating from the relocked subduction interface MH - Mexico|Jalisco MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000178886800006 L2 - SUBDUCTION; DEFORMATION; RIVERA; PLATE SO - Geophysical Research Letters 2002 ;29(8): 4786 UI - 10916 AU - Backstrand JR AU - Allen LH AU - Black AK AU - de Mata M AU - Pelto GH AD - NYU, Dept Nutr & Food Studies, New York, NY, USAUniv Calif Davis, Dept Nutr, Davis, CA 95616, USAAustin Peay State Univ, Dept Hlth & Human Performance, Clarksville, TN 37044, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoCornell Univ, Div Nutr Sci, Ithaca, NY 14853, USABackstrand, JR, Univ Med & Dent New Jersey, Program Urban Studies, 65 Bergen St,11th Floor, Newark, NJ 07107 USA TI - Diet and iron status of nonpregnant women in rural Central Mexico AB - Background: Few studies have examined the relation of iron status to diet in populations from developing countries with high levels of iron deficiency and diets of poor quality. Objective: The objective was to identify nutrients, dietary constituents, and foods that are associated with better iron status in a rural Mexican population. Design: A prospective cohort study was conducted in rural central Mexico. The subjects were 125 nonpregnant women aged 16-44 y. During the 12 mo before blood collection, food intakes were assessed repeatedly by a combination of dietary recalls, food weighing, and food diaries [mean (+/-SD) days of food intake data: 18.8 +/- 5.9 d]. Hemoglobin, hematocrit, and plasma ferritin were measured at the end of the study. Results: Higher plasma ferritin concentrations were associated with greater intakes of nonheme iron and ascorbic acid after control for age, BMI, breast-feeding, season, and the time since the birth of the last child. Higher ascorbic acid intakes, but not higher intakes of heme and norheme iron, predicted a lower risk of low hemoglobin and hematocrit values after control for the background variables. Consumption of the alcoholic beverage pulque predicted a lower risk of low ferritin and low hemoglobin values. Seasonal variation in ferritin, hemoglobin, and hematocrit values was observed. Conclusion: Better iron status was associated with greater intakes of foods containing nonheme iron and ascorbic acid. Pulque-a beverage containing iron, ascorbic acid, and alcohol-may influence the iron status of women in rural central Mexico MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 16 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000176378500017 L2 - iron status;nonpregnant women;diet;Mexico;NONHEME-IRON; ELDERLY POPULATION; HEME-IRON; VITAMIN-A; ABSORPTION; SUPPLEMENTATION; BIOAVAILABILITY; PRESCHOOLERS; DEFICIENCY; GROWTH SO - American Journal of Clinical Nutrition 2002 ;76(1):156-164 4787 UI - 10814 AU - Bacmann A AU - Lefloch B AU - Ceccarelli C AU - Castetes A AU - Steinacker J AU - Loinard L AD - Inst Astrophys, D-07745 Jena, GermanyUniv Sternwarte AIU, D-077456 Jena, GermanyObserv Grenoble, Astrophys Lab, F-38041 Grenoble, FranceObserv Bordeaux, F-33270 Florac, FranceUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoBacmann, A, Inst Astrophys, Schillergasschen 2-3, D-07745 Jena, Germany TI - The degree of CO depletion in pre-stellar cores AB - We present new results on CO depletion in a sample of nearby pre-stellar cores, based on observations of the millimeter (CO)-O-17 and (CO)-O-18 lines and the 1.3 mm dust emission with the IRAM 30 m telescope. In most cases, the distribution of CO is much flatter than that of the dust, whereas other tracers, like N2H+, still probe the latter. In the centre of these objects, we estimate CO to be underabundant by a factor 4-15 depending on the cores. The CO underabundance is more pronounced in the central regions and appears to decrease with increasing distance from the core centre. This underabundance is most likely due to the freezing out of CO onto the dust grains in the cold, dense parts of the cores. We find evidence for an increase of the CO depletion degree with the core density MH - France MH - Germany MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 32 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000176561500002 L2 - ISM : molecules;dust, extinction;stars : formation;MOLECULAR CLOUDS; STAR-FORMATION; THERMAL BALANCE; DARK CLOUD; DUST; ABUNDANCES; EMISSION SO - Astronomy & Astrophysics 2002 ;389(1):L6-L10 4788 UI - 10960 AU - Bada JL AU - Lazcano A AD - Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USANatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoBada, JL, Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA TI - Origin of life - Some like it hot, but not the first biomolecules MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 43 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000176273300039 L2 - ACID; RNA; DNA SO - Science 2002 ;296(5575):1982-1983 4789 UI - 11560 AU - Bada JL AU - Lazcano A AD - Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoBada, JL, Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA TI - Miller revealed new ways to study the origins of life - Science advances as one theory builds on another: Miller didn't just update Lob's work MH - USA MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0028-0836 UR - ISI:000174756500015 SO - Nature 2002 ;416(6880):475-475 4790 UI - 8997 AU - Baez-Gonzalez AD AU - Chen PY AU - Tiscareno-Lopez M AU - Srinivasan R AD - INIFAP, Lab Nacl Predicc Cosechas & Monitoreo Climat, Pabellon de Arteaga, Aguascalientes, MexicoTexas A&M Univ, Dept Forest Sci, Space Sci Lab, College Stn, TX 77843, USABaez-Gonzalez, AD, INIFAP, Lab Nacl Predicc Cosechas & Monitoreo Climat, Campo Expt Pabellon,Km 32-5,Ap Postal 20, Pabellon de Arteaga, Aguascalientes, Mexico TI - Using satellite and field data with crop growth modeling to monitor and estimate corn yield in Mexico AB - The large-scale monitoring and estimation of crop yield is essential for food security in Mexico. This study developed and validated a method of monitoring and estimating corn (Zea mays L.) yield by means of satellite and ground-based data. In autumn-winter 1999 and spring-summer 2000, eight locations under irrigated and nonirrigated conditions in corn valleys of Mexico were localized by Global Positioning Systems (GPS) and were sampled every 15 d. Photosynthetic active radiation (PAR), leaf area index (LAI), crop development stage (DVS), planting dates, and grain yield data were gathered from the field. The normalized difference vegetation index (NDVI) was derived from NOAA-Advanced Very High Resolution Radiometer (AVHRR) images. A growth model was developed to integrate satellite and ground data. Net primary productivity (NPP) was estimated using PAR and NDVI. Dry weight increase (kg ha(-1) d(-1)) was determined considering NPP and the partitioning factor. Results indicated that the model accounts for 89% of the variability in yields under irrigated conditions and 76% under nonirrigated conditions. The methodology seems advantageous in large-scale monitoring and assessment of corn yield MH - Mexico|Aguascalientes MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430200024 L2 - DIFFERENCE VEGETATION INDEX; NOAA-AVHRR; CANOPY REFLECTANCE; PEARL-MILLET; LEAF-AREA; EVAPOTRANSPIRATION; PHOTOSYNTHESIS; TRANSPIRATION; TEMPERATURE; AFRICA SO - Crop Science 2002 ;42(6):1943-1949 4791 UI - 11640 AU - Baeza-Larios G AU - Sivinski J AU - Holler T AU - Aluja M AD - Lab Aurora, Programa Moscamed, Guatemala City 01013, GuatemalaARS, USDA, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USAAPHIS, USDA, PPQ PPPC, GaPPL, Gainesville, FL 32602, USAInst Ecol, AC, Xalapa, Veracruz, MexicoBaeza-Larios, G, Lab Aurora, Programa Moscamed, Ave Hincapie & 18 Calle,Zona 13, Guatemala City 01013, Guatemala TI - The ability of Coptera haywardi (Ogloblin) (Hymenoptera : Diapriidae) to locate and attack the pupae of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera : Tephritidae), under seminatural conditions AB - In Latin America, the diapriid Coptera haywardi (Ogloblin) attacks the pupae of tephritid fruit flies. Anastrepha spp. are among its natural hosts, but in the laboratory it also develops in the exotic Mediterranean fruit fly, Ceratitis capitata (Wiedemann). Field cage tests demonstrated that C. haywardi could locate and parasitize Mediterranean fruit fly pupae under seminatural conditions as found in a Guatemalan coffee plantation. A mean of 18.3% of the pupae buried artificially at depths of similar to5 mm were parasitized by C. haywardi, while those buried at 15 mm suffered 3.2% parasitism. In a laboratory experiment, larvae that buried themselves to pupate were not significantly more likely to be parasitized than artificially buried pupae, although they may have left a physical or chemical trail that betrayed their presence. Thus, the artificial burial of pupae is unlikely to grossly underestimate C. haywardi efficacy in the field. Another field cage test found that mortality levels due to unsuccessful parasitoid attacks were similar to those resulting from successful parasitism. Thus, the actual effect of a mass-release might be considerably greater than that suggested from parasitism data alone. The results are considered sufficiently positive to encourage further testing of C. haywardi as a biological control agent of the Mediterranean fruit fly. (C) 2002 Elsevier Science (USA) MH - Guatemala MH - Mexico|Veracruz MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000174354900001 L2 - medfly;biological control;augmentative release;pupal parasitoid;integrated pest management;LONGICAUDATA ASHMEAD HYMENOPTERA; FLIES DIPTERA; ANASTREPHA SPP.; PARASITOIDS; BRACONIDAE; MEXICO SO - Biological Control 2002 ;23(3):213-218 4792 UI - 6699 AU - Bagnoli F AU - Franci F AU - Rechtman R AD - Univ Florence, Dipartimento Energet, I-50139 Florence, ItalyUniv Florence, Dipartimento Sistemi & Informat, I-50139 Florence, ItalyUNAM, Ctr Invest Energia, Temixco, Morelos, MexicoINFM, Sez Florence, Florence, ItalyBagnoli, F, Univ Florence, Dipartimento Energet, Via S Marta,3, I-50139 Florence, Italy TI - Opinion formation and phase transitions in a probabilistic cellular automaton with two absorbing states AB - We discuss the process of opinion formation in a completely homogeneous, democratic population using a class of probabilistic cellular automata models with two absorbing states. Each individual can have one of two opinions that can change according to that of his neighbors. It is dominated by an overwhelming majority and can disagree against a marginal one. We present the phase diagram in the mean field approximation and from numerical experiments for the simplest nontrivial case. For arbitrarily large neighborhoods we discuss the mean field results for a non-conformist society, where each individual adheres to the overwhelming majority of its neighbors and choses an opposite opinion in other cases. Mean field results and preliminary lattice simulations with long-range connections among individuals show the presence of coherent temporal oscillations of the population MH - Italy MH - Mexico|Morelos PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000187254200024 L2 - KINETIC CRITICAL PHENOMENON; DIRECTED PERCOLATION; SOCIAL IMPACT; SYSTEMS; EXPONENTS; DYNAMICS; MODELS SO - Cellular Automata, Proceedings 2002 ;2493():249-258 4793 UI - 9888 AU - Bai DS AU - Alonso ME AU - Medina MT AU - Bailey JN AU - Morita R AU - Cordova S AU - Rasmussen A AU - Ramos-Peek J AU - Ochoa A AU - Jara A AU - Donnadieu FR AU - Cadena G AU - Yamakawa K AU - gado-Escueta AV AD - Univ Calif Los Angeles, Epilepsy Genet Genom Labs, Comprehens Epilepsy Program 127B, Los Angeles, CA 90073, USAVA GLAHS, Los Angeles, CA, USANatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoNatl Autonomous Univ, Tegucigalpa, HondurasUniv Calif Los Angeles, Inst Neuropsychiat, Los Angeles, CA 90024, USARIKEN, Brain Sci Inst, Neurogenet Lab, Wako, Saitama, JapanDelgado-Escueta, AV, Univ Calif Los Angeles, Epilepsy Genet Genom Labs, Comprehens Epilepsy Program 127B, 11301 Wilshire Blvd, Los Angeles, CA 90073 USA TI - Juvenile myoclonic epilepsy: Linkage to chromosome 6p12 in Mexico families AB - Juvenile myoclonic epilepsy is a common subtype of idiopathic epilepsy accounting for 4-11% of all epilepsies. We reported previously significant evidence of linkage between chromosome 6p12-11 microsatellites and the clinical epilepsy and EEG traits of JME families from Belize and Los Angeles. To narrow the JME region, we ascertained and genotyped 31 new JME families from Mexico using a later generation of Genethon microsatellites. Two point linkage analyses obtained significant Z(max) values of 3.70 for D6S1573 and 2.65 for D6S1714 at theta(m=f) = 0.10, and 3.49 for D6S465, 2.11 for D6S1960 at theta(m=f) =0.05 assuming autosomal dominant inheritance with 70% age-dependent penetrance. Multipoint LOD score curve peaked at 4.21 for D6S1573. Haplotype and recombination analysis reduced the JME region to 3.5 cM flanked by D6S272 and D6S1573. These results provide confirmatory evidence that a major susceptibility gene for JME exists in chromosome 6p12 in Spanish-Amerinds of Mexico. (C) 2002 Wiley-Liss, Inc MH - USA MH - Honduras MH - Japan MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 13 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000179171500008 L2 - juvenile myoclonic epilepsy;genetics;linkage analysis;6p;IDIOPATHIC GENERALIZED EPILEPSY; CHANNEL I-CLN; SUSCEPTIBILITY LOCUS; HLA REGION; GENE; LOCALIZATION; HETEROGENEITY; ASSOCIATION; PROTEIN SO - American Journal of Medical Genetics 2002 ;113(3):268-274 4794 UI - 11562 AU - Baier G AU - Muller M AU - Orsnes H AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoS Danish Univ, Inst Biochem, Phys Biochem Grp, DK-5230 Odense M, DenmarkBaier, G, Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, Mexico TI - Excitable spatio-temporal chaos in a model of glycolysis AB - We study the spatio-temporal dynamics of a qualitative model of the glycolytic reaction catalyzed by phosphofructokinase. Adding the nonlinear regulation by fructose-2,6-bisphosphate, the model is found to exhibit complex oscillations and two types of chaos. In particular, a region of excitable chaos is found in parameter space. In a spatially extended system, this excitable chaos gives rise to spontaneous irregular spiking as well as self-organized formation of spots of high ATP concentration with "center-surround" characteristics. The deterministic spiking has noise-like temporal proper-ties but shows a pronounced "memory", which we attribute to the transient aparition of a Turing-pattern that exists nearby in parameter space. The model thus provides an example of an excitable medium that prohibits (rather than permits) the propagation of concentration waves. This could be exploited by the living cell to self-organize pronounced local amplification of ATP MH - Denmark MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000174589000033 L2 - CYTOSOLIC-FREE CA2+; FRUCTOSE 2,6-BISPHOSPHATE; OSCILLATORY GLYCOLYSIS; BIOCHEMICAL SYSTEM; MUSCLE EXTRACTS; BETA-CELLS; MIXED-MODE; PATTERNS; GLUCOSE; CYCLE SO - Journal of Physical Chemistry B 2002 ;106(12):3275-3282 4795 UI - 11607 AU - Bailey AM AU - Mitchell DJ AU - Manjunath KL AU - Nolasco G AU - Niblett CL AD - IPN, CINVESTAV, Dept Ingn Genet Plantas, Unidad Irapuato, Irapuato, MexicoUniv Florida, Dept Plant Pathol, Gainesville, FL 32611, USAUniv Florida, Dept Hort Sci, Gainesville, FL 32611, USAUniv Algarve, FERN, Faro, PortugalBailey, AM, IPN, CINVESTAV, Dept Ingn Genet Plantas, Unidad Irapuato, Irapuato, Mexico TI - Identification to the species level of the plant pathogens Phytophthora and Pythium by using unique sequences of the ITS1 region of ribosomal DNA as capture probes for PCR ELISA AB - The ribosomal internal transcribed spacer 1 region was sequenced for 10 species of Phythium and eight species of Phytophthora. Alignment of the sequences revealed considerable sequence microheterogeneity, which was utilized to prepare a capture probe of unique sequence for each species. The capture probes were tested by PCR ELISA, combining the sensitivity and specificity of the polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). The probes were entirely species specific, enabling the detection and identification of the amplified DNA of species from individual Cultures or front mixed samples of the DNAs of two different species. This approach to species identification, which provides a molecular technology to process large numbers of samples and still identify the fungi with a high level of confidence, may greatly reduce the resources and the time of highly trained specialists currently needed to identify these important species of plant pathogenic fungi. (C) 2002 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Portugal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000174393900007 L2 - internal transcribed spacer 1 region;ribosomal DNA;PCR ELISA;Pythium;Phytophthora;RT-PCR; ASSAY SO - Fems Microbiology Letters 2002 ;207(2):153-158 4796 UI - 9911 AU - Baker RJ AU - Edwards PG AU - Garcia-Mora J AU - Ingold F AU - Malik KMA AD - Cardiff Univ, Dept Chem, Cardiff CF10 3TB, S Glam, WalesUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoEdwards, PG, Cardiff Univ, Dept Chem, POB 912, Cardiff CF10 3TB, S Glam, Wales TI - Manganese and rhenium triphosphorus macrocycle complexes and reactions with alkenes AB - The synthesis of Re(III), Re(I) and Mn(I) compounds of the macrocyclic phosphine ligand 1,5,9-trialkyl-1,5,9-triphosphacyclododecane, 12[ane] P3R3 (R = Et, Bu-i) is described. The reaction of 12[ane] P3R3 with ReCl3 (PPh3)(2) ( CH3CN) or ReCl3 (PPhMe2)(3) gives rise to the octahedral d(4) complexes (12[ane] P3R3)ReCl3 (1(R)). Reduction of 1(iBu) with Na/Hg under a CO atmosphere gives the rhenium(I) compound (12[ane] P3R3)Re(CO)(2)Cl, 2(R) which undergoes further reactivity to give hydride (3(R)), vinylidene (4(R)) and allenylidene (5(R)) compounds. With Mn(CO)(5)Br, 12[ane] P3Et3 gives the octahedral d(6) complex, (12[ane] P3Et3)Mn(CO)(2)Br, 6(Et). The crystal structures of (12[ane] (P3Bu3)-Bu-i)ReCl3 and (12[ane] P3Et3)Mn(CO)(2)Br are presented MH - Mexico|Distrito Federal MH - United Kingdom PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000178926800015 L2 - OPENING METATHESIS POLYMERIZATION; RUTHENIUM ALLENYLIDENE COMPLEXES; TRANSITION-METAL COMPLEXES; OLEFIN METATHESIS; CATALYSTS; PHOSPHINE; LIGANDS; CARBENE; VINYLIDENE; MOLYBDENUM SO - Journal of the Chemical Society-Dalton Transactions 2002 ;(21):3985-3992 4797 UI - 11265 AU - Baker WF AU - Bjorhovde R AU - Burgett L AU - Carter C AU - Disque RO AU - Engestrom MF AU - Fisher JM AU - Geschwindner LF AU - Griffis LG AU - Gross JL AU - Ioannides SA AU - Julicher AJ AU - Kloiber L AU - Malley JO AU - Martinez-Romero E AU - Murray TM AU - Nair RS AU - Ricker DT AU - Rongoe JJ AU - Ruddy JL AU - Stecich J AU - Thornton WA AU - Troup EWJ AU - Wiesner KB AU - Youssef NFG AD - ASCE Struct Engn Inst, Reston, VA 20191, USASkidmore Owings & Merrill Inc, Chicago, IL, USABjorhovde Grp, Tucson, AZ, USAAISC, Chicago, IL, USAGNCB Inc, Old Saybrook, CT, USANucor Yamato Steel, Weston, FL, USAComputerized Struct Design Inc, Milwaukee, WI, USAPenn State Univ, University Pk, PA 16802, USAWalter P Moore & Assoc, Austin, TX, USANatl Inst Stand & Technol, Gaithersburg, MD 20899, USAStruct Affiliates Int Inc, Nashville, TN, USALeJuene Steel Co, Minneapolis, MN, USADegenkolb Engn, San Francisco, CA, USAEnrique Martinez Romero SA, Mexico City, DF, MexicoVirginia Polytech Inst & State Univ, Blacksburg, VA 24061, USATeng & Assoc, Chicago, IL, USAWiss Janney Elstner Assoc Inc, Chicago, IL, USACives Steel Co, Roswell, GA, USALeMessurier Consultants Inc, Cambridge, MA, USANabih Youssef & Assoc, Los Angeles, CA, USABaker, WF, ASCE Struct Engn Inst, 1801 Alexander Bell Dr, Reston, VA 20191 USA TI - Compendium of design office problems - Volume III AB - This is the third in a series of papers aimed at resolving structural engineering issues faced by the designers of steel building structures. The emphasis is on practical solutions that the designer can use directly, without extensive further research. Each issue is listed separately, with a technical discussion of the problem followed by a suggested solution, and references provided where appropriate. In addition, topics currently under study by the ASCE Committee on Design of Steel Building Structures are listed, as are subjects identified by the Committee as being in need of investigation MH - USA MH - Mexico|Distrito Federal PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Engineering, Civil U5 - J;Article AV - English IS - 0733-9445 UR - ISI:000175216000001 L2 - structural engineering;steel structures;building design;ASCE committees;SHEAR CONNECTIONS; BEAMS SO - Journal of Structural Engineering-Asce 2002 ;128(5):559-568 4798 UI - 10259 AU - Bakonyi I AU - Toth-Kadar E AU - Cziraki A AU - Toth J AU - Kiss LF AU - Ulhaq-Bouillet C AU - Pierron-Bohnes V AU - Dinia A AU - Arnold B AU - Wetzig K AU - Santiago P AU - Yacaman MJ AD - Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1525 Budapest, HungaryLorand Eotvos Univ, Dept Solid State Phys, H-1518 Budapest, HungaryInst Phys & Chim Mat Strasbourg, ULp, CNRS, UMR C75040, F-67037 Strasbourg, FranceInst Festkorper & Werkstofforsch, Inst Festkorperanalyt & Strukturforsch, D-01069 Dresden, GermanyInst Nacl Invest Nucl, Salazar 52045, MexicoBakonyi, I, Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary TI - Preparation, structure, magnetic, and magnetotransport properties of electrodeposited Co(Ru)/Ru multilayers AB - It is demonstrated that Co(Ru)/Ru multilayers with a hexagonal close-packed structure can be produced by electrodeposition. For appropriate layer thicknesses, clear giant magnetoresistance (GMR) behavior has been found. The observed GMR is very small (less than 0.1% for 8 kOe at room temperature! but not smaller than the GMR of Co/Ru multilayers prepared previously by high-vacuum methods. It is argued that neither structural imperfection of the multilayers nor chemical intermixing at the interfaces can be the main reason for the small GMR observed in the Co-Ru system for any preparation technique. It is suggested that the strongly reduced spin-dependent scattering characteristics of the interfacial Co-Ru alloys, which was described in a previous paper, might explain the low GMR of Co/Ru multilayers. (C) 2002 The Electrochemical Society MH - France MH - Germany MH - Hungary MH - Mexico|Estado De Mexico PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000178030100026 L2 - NI-CU/CU MULTILAYERS; GIANT MAGNETORESISTANCE; SUPERLATTICE STRUCTURES; CO/RU SUPERLATTICES; ALLOYS; SANDWICHES; MICROSTRUCTURE SO - Journal of the Electrochemical Society 2002 ;149(10):C469-C473 4799 UI - 10439 AU - Balachandran AP AU - Dolan BP AU - Lee J AU - Martin X AU - O'Connor D AD - CINVESTAV, Dept Fis, Mexico City 0730, DF, MexicoSyracuse Univ, Dept Phys, Syracuse, NY 13244, USAUniv Seoul, Dept Phys, Seoul 130743, South KoreaDolan, BP, CINVESTAV, Dept Fis, Apartado Postal 70-543, Mexico City 0730, DF, Mexico TI - Fuzzy complex projective spaces and their star-products AB - We derive an explicit expression for an associative (*)-product on the fuzzy complex projective space, CPFN-1. This generalises previous results for the fuzzy 2-sphere and gives a discrete non-commutative algebra of functions on CPFN-1, represented by matrix multiplication. The matrices are restricted to ones whose dimension is that of the totally symmetric representations of SU(N). In the limit of infinite-dimensional matrices we recover the commutative algebra of functions on CPN-1. Derivatives on CPFN-1 are also expressed as matrix commutators. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 44 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0393-0440 UR - ISI:000177473500005 L2 - non-commutative geometry;star-product;QUANTUM-FIELD THEORY; NONCOMMUTATIVE GEOMETRY; DIRAC OPERATOR; SPHERE; CPN; REGULARIZATION; CONSTRUCTION; REDUCTION; PHYSICS SO - Journal of Geometry and Physics 2002 ;43(2-3):184-204 4800 UI - 11909 AU - Balandran-Quintana RR AU - Mendoza-Wilson AM AU - varez-Manilla G AU - Bergmann CW AU - Vargas-Arispuro I AU - Martinez-Tellez MA AD - Ctr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoUniv Autonoma Chihuahua, Fac Ciencias Quim, Chihuahua, Chih, MexicoUniv Georgia, Complex Carbohydrate Res Ctr, Athens, GA 30602, USAMartinez-Tellez, MA, Ctr Invest Alimentac & Desarrollo AC, Km 0-6,Carretera La Victoria,Apdo Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Effect of pectic oligomers on physiological responses of chilling injury in discs excised from zucchini (Cucurbita pepo L.) AB - The effect of pectic oligomers (OG) on ethylene biosynthesis, electrolyte leakage (EL), and CO2 production was studied in discs excised from zucchini fruit (Cucurbita pepo L.) and stored at 20 or 2.5degreesC. At 20degreesC, OG enhanced ethylene biosynthesis and had a transient effect on decreasing EL, but showed little effect on respiratory rate; both the amount and size of the oligomer were important in changing both ethylene synthesis and EL. At 2.5degreesC, OG increased both ethylene biosynthesis and respiratory rate with a maximum effect at 100 mug of oligomer and peaking at 6 h; shorter oligomers demonstrated an even greater effect on ethylene biosynthesis, but differences were smaller in respiratory rate. EL at 2.5degreesC was affected most by 1 mug of OG and by monomeric galacturonic acid, with transient increases that peaked at 8 h. We suggest a signaling role for OG in the early steps of cold acclimation or chilling injury. (C) 2002 Elsevier Science MH - Mexico|Chihuahua MH - Mexico|Sonora MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000173480900088 L2 - chilling injury;oligosaccharins;pectic oligomers;ethylene;electrolyte leakage;Cucurbita pepo L.;zucchini squash;CELL-WALL; ETHYLENE PRODUCTION; SIGNAL-TRANSDUCTION; ELECTROLYTE LEAKAGE; MEMBRANE FLUIDITY; COLD-ACCLIMATION; PLANT-TISSUES; TOMATO FRUIT; CALCIUM; INDUCTION SO - Biochemical and Biophysical Research Communications 2002 ;290(1):577-584 4801 UI - 10390 AU - Balderas-Lopez JA AU - Mandelis A AU - Garcia JA AD - Univ Toronto, Dept Mech & Ind Engn, PODL, Toronto, ON M5S 3G8, CanadaIPN, Unidad Profes Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoBalderas-Lopez, JA, Univ Toronto, Dept Mech & Ind Engn, PODL, 5 Kings Coll Rd, Toronto, ON M5S 3G8, Canada TI - Normalized photoacoustic techniques for thermal diffusivity measurements of buried layers in multilayered systems AB - The one-dimensional heat diffusion problem for a three-layer system is solved assuming the surface absorption model. The analytical solution is shown to be suitable for the implementation of normalized depth-profilometric photoacoustic methodologies involving the open photoacoustic-cell configuration for thermal diffusivity measurements in buried underlayers within a three-layer stack. Our normalization procedures eliminate the frequency-dependent instrumental electronic contribution (transfer function) and some thermophysically nonrelevant proportionality factors in the theoretical equations, thus making the depth-profilometric analysis feasible. The measurement methodology is achieved by normalizing the theoretical photoacoustic signal from the three layers with the corresponding signal from the uppermost two layers, involving linear fits to measure the thermal diffusivity of the third underlayer. Three different multilayered materials were examined using the proposed methodologies. High reproducibility of the thermal diffusivity measurements and good agreement with values reported in literature were found. Besides the foregoing procedures, a lumped photoacoustic model was developed, which yields the effective thermal-diffusivity value of the multilayer stack. (C) 2002 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000177683000017 L2 - LIQUIDS; SIGNAL SO - Journal of Applied Physics 2002 ;92(6):3047-3055 4802 UI - 11167 AU - Balderas-Lopez JA AU - Mandelis A AD - Univ Toronto, Dept Mech & Ind Engn, PODL, Toronto, ON M5R 3G8, CanadaIPN, Unidad Profes Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoBalderas-Lopez, JA, Univ Toronto, Dept Mech & Ind Engn, PODL, 5 Kings Coll Rd, Toronto, ON M5R 3G8, Canada TI - Novel transmission open photoacoustic cell configuration for thermal diffusivity measurements in liquids AB - In this paper the photoacoustic technique in the thermal-wave transmission configuration is applied to thermal diffusivity measurements in liquids. The one-dimensional heat diffusion problem involving three layers, and assuming surface absorption only, is solved for this goal. Linear relations among the photoacoustic amplitude (on a semi-log scale) and phase, as functions of the liquid sample thickness, are shown in each case. An analytical procedure involving linear fits to the experimental data is developed to produce two independent values for thermal diffusivity. The thermal diffusivity of three homogeneous liquids (distilled water, ethylene-glycol, and olive oil) was measured, and excellent agreement was obtained between results from both the amplitude and phase, as well as with thermal-diffusivity values reported in the literature MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 6 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000175503800001 L2 - liquids;open photoacoustic cell;photoacoustic technique;thermal diffusivity;PHOTOPYROELECTRIC SPECTROSCOPY; PARAMETERS; CAVITY; SOLIDS SO - International Journal of Thermophysics 2002 ;23(3):605-614 4803 UI - 11785 AU - Balderas-Navarro RE AU - Bonanni A AU - Ramil AM AU - Sitter H AU - Stifter D AU - Hingerl K AD - Profactor GmbH, A-4400 Steyr, AustriaUniv San Lois Potosi, San Lois Potosi, MexicoJohannes Kepler Univ, Inst Halbleiter & Festkorperphys, A-4400 Linz, AustriaHingerl, K, Profactor GmbH, Wehrgrabengasse 1-5, A-4400 Steyr, Austria TI - Collective dimer stress induced dichroism in II-VI semiconductors AB - The physical origin of sharp resonances in reflectance difference spectroscopy data at the critical points of the dielectric function of bulk semiconductors is shown to arise from an uniaxial in-plane stress component. These resonances are induced at the critical points via lifting the degeneracy of the optical transitions at the L and Gamma points due to the resulting anisotropic strain MH - Austria MH - Mexico|San Luis Potosi PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000173806600033 L2 - REFLECTANCE DIFFERENCE SPECTROSCOPY; MOLECULAR-BEAM EPITAXY; ANISOTROPY; E-1+DELTA(1); SURFACE; E-1; ZNSE/GAAS(100); GAAS(100); INTERFACE; SPECTRUM SO - Physica Status Solidi B-Basic Research 2002 ;229(1):155-159 4804 UI - 9781 AU - Baldovin F AU - Robledo A AD - Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBaldovin, F, Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil TI - Universal renormalization-group dynamics at the onset of chaos in logistic maps and nonextensive statistical mechanics AB - We uncover the dynamics at the chaos threshold mu(infinity) of the logistic map and find that it consists of trajectories made of intertwined power laws that reproduce the entire period-doubling cascade that occurs for mu<μ(&INFIN;). We corroborate this structure analytically via the Feigenbaum renormalization-group (RG) transformation and find that the sensitivity to initial conditions has precisely the form of a q exponential, of which we determine the q index and the q-generalized Lyapunov coefficient λ(q). Our results are an unequivocal validation of the applicability of the nonextensive generalization of Boltzmann-Gibbs statistical mechanics to critical points of nonlinear maps MH - Brazil MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 59 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179176300004 L2 - POWER-LAW SENSITIVITY; DISSIPATIVE SYSTEMS; INITIAL CONDITIONS; QUASI-PERIODICITY; FRACTALITY SO - Physical Review e 2002 ;66(4): 4805 UI - 9813 AU - Baldovin F AU - Robledo A AD - Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBaldovin, F, Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil TI - Sensitivity to initial conditions at bifurcations in one-dimensional nonlinear maps: Rigorous nonextensive solutions AB - Using the Feigenbaum renormalization group (RG) transformation we work out exactly the dynamics and the sensitivity to initial conditions for unimodal maps of nonlinearity zeta > 1 at both their pitchfork and tangent bifurcations. These functions have the form of q-exponentials as proposed in Tsallis' generalization of statistical mechanics. We determine the q-indices that characterize these universality classes and perform for the first time the calculation of the q-generalized Lyapunov coefficient lambda(q). The pitchfork and the left-hand side of the tangent bifurcations display weak insensitivity to initial conditions, while the right-hand side of the tangent bifurcations presents a "super-strong" (faster than exponential) sensitivity to initial conditions. We corroborate our analytical results with a priori numerical calculations MH - Brazil MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 52 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000179169600005 L2 - POWER-LAW SENSITIVITY; THERMODYNAMICS; INTERMITTENCY; FRACTALITY SO - Europhysics Letters 2002 ;60(4):518-524 4806 UI - 11180 AU - Ballesteros-Paredes J AU - Vazquez-Semadeni E AU - Goodman AA AD - Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USABallesteros-Paredes, J, Amer Museum Nat Hist, Dept Astrophys, Cent Pk W & 79th St, New York, NY 10024 USA TI - Velocity structure of the interstellar medium as seen by the spectral correlation function AB - We use the statistical tool known as the "spectral correlation function" (SCF) to intercompare simulations and observations of the atomic interstellar medium ( ISM). The simulations considered, which mimic three distinct sets of physical conditions, are each calculated for a 300 pc(3) box centered at the Galactic plane. The "ISM" run is intended to represent a mixture of cool and warm atomic gas and includes self-gravity and magnetic fields in the calculations. The "ISM-IT" run is more representative of molecular clouds, in which the gas is presumed isothermal. The third run "IT" is for purely isothermal gas, with zero magnetic field and no self-gravity. Forcing in the three cases is accomplished by including simulated effects of stellar heating (ISM), stellar winds (ISM-IT), or random compressible fluctuations (IT). For each simulation, H I spectral line maps are simulated, and it is these maps that are intercompared, both with each other and with observations, using the SCF. For runs where the separation of velocity features is much greater than the "thermal" width of a line, density-weighted velocity histograms are decent estimates of H I spectra. When thermal broadening is large in comparison with fine-scale turbulent velocity structure, this broadening masks subthermal velocity substructure in observed spectra. So, simulated spectra for runs in which thermal broadening is important must be calculated by convolving density-weighted histograms with Gaussians whose width represents the thermal broadening. The H I observations we use for comparison are of the north celestial pole (NCP) loop, a region chosen to minimize line-of-sight confusion on scales greater than 100 pc. None of the simulations match the NCP loop data very well, for a variety of reasons described in the paper. Most of the reasons for simulation/observation discrepancy are predictable and understandable, but one is particularly interesting: the most realistic sets of line profiles and SCF statistics come from artificially expanding the velocity axis of the ISM run by a factor of 6. Without rescaling, the low-velocity dispersion associated with much of the gas in the ISM run causes almost all of the spectra to appear as virtually identical Gaussians whose width is determined solely by temperature-all velocity structure is smeared out by thermal broadening. However, if the velocity axis is expanded by a factor of 6, the SCF distributions of the ISM run and the NCP loop match up fairly well. This means that the ratio of thermal to turbulent pressure in the ISM simulation is much too large as it stands, and that the simulation is deficient in turbulent energy. This is a consequence of the ISM run not including the effects of supernovae. This paper concludes that the SCF is a useful tool for understanding and fine-tuning simulations of interstellar gas, and in particular that realistic simulations of the atomic ISM need to include the effects of energetic stellar winds (e. g., supernovae) in order for the ratio of thermal-to-turbulent pressure to give spectra representative of the observed ISM in our Galaxy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175519000025 L2 - ISM : clouds;ISM : kinematics and dynamics;methods : data analysis;methods : statistical turbulence;STAR-FORMING REGIONS; MOLECULAR CLOUDS; TURBULENT MODEL; STATISTICS; GAS; SIMULATIONS; EVOLUTION; FLOWS SO - Astrophysical Journal 2002 ;571(1):334-355 4807 UI - 9478 AU - Banda-Leal J AU - Bryson RW AU - Villarreal DL AD - Univ Autonoma Nuevo Leon, Lab Herpetol, San Nicolas de los Garza 66450, Neuvo Leon, MexicoBryson, RW, Sul Ross State Univ, Dept Biol, Alpine, TX 79832, USA TI - New record of Elgaria parva (Lacertilia : Anguidae) from Nuevo Leon, Mexico MH - Mexico|Nuevo Leon MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000180121700015 SO - Southwestern Naturalist 2002 ;47(4):614-615 4808 UI - 10455 AU - Bandyopadhyay A AU - Lopez-Casillas F AU - Malik SN AU - Montiel JL AU - Mendoza V AU - Yang JH AU - Sun LZ AD - Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Surg, San Antonio, TX 78229, USAUniv Nacl Autonoma Mexico, Dept Biol Celular, Inst Fisiol Celular, Mexico City 04510, DF, MexicoSun, LZ, Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, 7703 Floyd Curl Dr,Mail Code 7762, San Antonio, TX 78229 USA TI - Antitumor activity of a recombinant soluble betaglycan in human breast cancer xenograft AB - We have demonstrated previously that ectopic expression of a soluble betaglycan, also known as transforming growth factor (TGF) beta type III receptor, can suppress the malignant properties of human carcinoma cells by antagonizing the tumor-promoting activity of TGF-beta (A. Bandyopadhyay et al., Cancer Res., 59: 5041-5046, 1999). In the current study, we investigated the potential therapeutic utility of a recombinant preparation of human and rat soluble betaglycan (sBG). Purified recombinant human sBG showed similar properties to its rat counterpart (M. M. Vilchis-Landeros et al., Biochem J., 355: 215-222, 2001). It bound TGF-beta with high affinity and isoform selectivity and neutralized the activity of TGF-beta(1) in two bioassays. Peritumoral (50 mug/tumor, twice a week) or i.p. (100 mug/animal, every alternate day) injection of sBG into human breast carcinoma MDA-MB-231 xenograft-bearing athymic nude mice significantly inhibited the tumor growth. The administration of sBG also reduced metastatic incidence and colonies in the lungs. The tumor-inhibitory activity of sBG was found to be associated with the inhibition of angiogenesis. Systemic sBG treatment significantly reduced tumor microvessel density detected with histological analyses and CD-31 immunostainings, as well as tumor blood volume measured with hemoglobin content. In an in vitro angiogenesis assay, treatment with the recombinant sBG significantly reduced the ability of human dermal microvascular endothelial cells to form a capillary tube-like structure on Matrigel. These findings support the conclusion that sBG treatment suppresses tumor growth and metastasis, at least in part by inhibiting angiogenesis. As such, it could be a useful therapeutic agent to antagonize the tumor-promoting activity of TGF-beta MH - Mexico|Distrito Federal MH - USA PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 42 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000177496600028 L2 - GROWTH-FACTOR-BETA; RECEPTOR SUPPRESSES TUMORIGENICITY; TGF-BETA; LIGAND-BINDING; MDA-MB-231 CELLS; GENE-THERAPY; EXPRESSION; ANGIOGENESIS; ANTIBODIES; MECHANISMS SO - Cancer Research 2002 ;62(16):4690-4695 4809 UI - 11064 AU - Bandyopadhyay A AU - Zhu Y AU - Malik SN AU - Kreisberg J AU - Brattain MG AU - Sprague EA AU - Luo J AU - Lopez-Casillas F AU - Sun LZ AD - Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Surg, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Radiol, San Antonio, TX 78229, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoSun, LZ, Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Extracellular domain of TGF beta type III receptor inhibits angiogenesis and tumor growth in human cancer cells AB - TGFbeta overexpression in human cancer cells has been shown to promote tumor progression. In the present study, we sought to determine whether sequestration of endogenous TGFbeta by the expression of a soluble TGFbeta type III receptor (sRIII), can reduce malignancy in human carcinoma cells and whether the tumor-suppressive activity of sRIII is associated with the inhibition of angiogenesis. Ectopic expression of sRIII significantly inhibited the growth of tumors formed by human colon carcinoma HCT116 and breast carcinoma MDA-MB-435 cells in nude mice. It also reduced the metastatic potential of the MDA-MB-435 cells. Thus, endogenous TGFbeta appears to be necessary for the progression of these two carcinomas. Furthermore, when the tumor cells were mixed with Matrigel and embedded subcutaneously in nude mice, the blood volume in Matrigel plugs containing sRIII-expressing cells as indicated by hemoglobin levels was significantly lower than that in Matrigel plugs containing the respective control cells. Blood vessel counts in paraffin sections of the Matrigel plugs containing sRIII-expressing cells were also significantly lower than those in paraffin sections of the Matrigel plugs containing control cells. Treatment of human endothelial cells with a recombinant sRIII significantly inhibited their ability to form a capillary web structure on Matrigel. These results for the first time indicate that the sRIII-induced tumor suppression appears to be in part due to the inhibition of angiogenesis MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 27 U4 - Biochemistry & Molecular Biology;Oncology;Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0950-9232 UR - ISI:000175793700005 L2 - TGF beta type III receptor;angiogenesis;metastasis;tumor growth;COLON-CARCINOMA CELLS; TRANSFORMING GROWTH-FACTOR-BETA-1; SUPPRESSES TUMORIGENICITY; MDA-MB-231 CELLS; ATHYMIC MICE; EXPRESSION; BETAGLYCAN; METASTASIS; MEMBRANE; PROTEOGLYCAN SO - Oncogene 2002 ;21(22):3541-3551 4810 UI - 11721 AU - Banerjee A AU - Sen KD AU - Garza J AU - Vargas R AD - Ctr Adv Technol, Laser Programme, Indore 452013, IndiaUniv Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, IndiaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoBanerjee, A, Ctr Adv Technol, Laser Programme, Indore 452013, India TI - Mean excitation energy, static polarizability, and hyperpolarizability of the spherically confined hydrogen atom AB - Calculations of mean excitation energy, I-m, static polarizability, alpha, and hyperpolarizability, gamma, using the variation perturbation procedure are reported for the spherically confined hydrogen atom. The electric response properties alpha and gamma have been found to strongly depend upon the radius of confinement. The hyperpolarizabilty changes sign and becomes negative under strong confinement. (C) 2002 American Institute of Physics MH - India MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 16 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000174087000010 L2 - COMPRESSED ATOMS; IONIZATION RADII; DENSITY; SYSTEMS; BOXES; MODEL SO - Journal of Chemical Physics 2002 ;116(10):4054-4057 4811 UI - 10285 AU - Barajas-Aceves M AU - Vera-Aguilar E AU - Bernal MP AD - IPN, CINVESTAV, Dept Biotechnol & Bioengn, Mexico City 07300, DF, MexicoIPN, CINVESTAV, Dept Toxicol, Mexico City 07300, DF, MexicoCSIC, Ctr Edafol & Biol Aplicada Segura, Murcia 41953080, SpainBarajas-Aceves, M, IPN, CINVESTAV, Dept Biotechnol & Bioengn, Av IPN 2508, Mexico City 07300, DF, Mexico TI - Carbon and nitrogen mineralization in soil amended with phenanthrene, anthracene and irradiated sewage sludge AB - Irradiation of sewage sludge reduces pathogens and can hydrolyze or destroy organic molecules. The effect of irradiation of sewage sludge on C and N dynamics in arable soil and possible interference with toxic organic compounds was investigated in soil microcosms using a clay soil. The soil was treated with phenanthrene and anthracene, with and without irradiated and non-irradiated sewage sludge amendment. All the treated soils were incubated for 182 days at 25degreesC. The CO2 production and dynamics of inorganic N (NH4+, NO2- and NO3-) were monitored. Addition of sewage sludge (0.023 g g(-1) soil), anthracene or phenanthrene (10.0 mug g(-1) soil dissolved in methanol), and methanol (10 mg g(-1) soil) to soil had a significant effect on CO2 production compared to the control. However, there were no significant differences between soil treated with irradiated and non-irradiated sewage sludge. Irradiated sewage sludge increased the C and N mineralization of anthracene amended soils to a greater extend than in phenanthrene amended soils. Nitrification was inhibited for 28 days in soil treated with either methanol, anthracene and phenanthrene. Application of sewage sludge reduced such toxicity effects after 28 days incubation. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000178063400001 L2 - carbon mineralization;nitrification;phenanthrene;anthracene;irradiation;sewage sludge;POLYCYCLIC AROMATIC-HYDROCARBONS; ORGANIC-CARBON; DEGRADATION SO - Bioresource Technology 2002 ;85(3):217-223 4812 UI - 9831 AU - Barajas-Lopez C AU - Montano LM AU - Espinosa-Luna R AD - Queens Univ, Dept Anat & Cell Biol, Kingston, ON K7L 3N6, CanadaUniv Nacl Autonoma Mexico, Inst Nacl Enfermedades Resp, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoBarajas-Lopez, C, Queens Univ, Dept Anat & Cell Biol, Botterell Hall,9th Floor, Kingston, ON K7L 3N6, Canada TI - Inhibitory interactions between 5-HT3 and P2X channels in submucosal neurons AB - Inhibitory interactions between 5-HT subtype 3 (5-HT3) and P2X receptors were characterized using whole cell recording techniques. Currents induced by 5-HT (I5-HT) and ATP (I-ATP) were blocked by tropisetron (or ondansetron) and pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid, respectively. Currents induced by 5-HT + ATP (I5-HT+ATP) were only as large as the current induced by the most effective transmitter, revealing current occlusion. Occlusion was observed at membrane potentials of -60 and 0 mV (for inward currents), but it was not present at +40 mV (for outward currents). Kinetic and pharmacological properties of I5-HT+ATP indicate that they are carried through 5-HT3 and P2X channels. Current occlusion occurred as fast as activation of I5-HT and I-ATP, was still present in the absence of Ca2+ or Mg2+, after adding staurosporine, genistein, K-252a, or N-ethylmaleimide to the pipette solution, after substituting ATP with proportional to,beta-methylene ATP or GTP with GTP-gamma-S in the pipette, and was observed at 35degreesC, 23degreesC, and 8degreesC. These results are in agreement with a model that considers that 5-HT3 and P2X channels are in functional clusters and that these channels might directly inhibit each other MH - Canada MH - Mexico|Distrito Federal PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Gastroenterology & Hepatology;Physiology U5 - J;Article AV - English IS - 0193-1857 UR - ISI:000179244400004 L2 - autonomic neurons;enteric neurons;ligand-gated channels;ion channels;ATP;ATP receptors;P2X receptors;serotonin;5-hydroxytryptamine;5-hydroxytryptamine 3 channels;5-hydroxytryptamine 3 receptors;fast neurotransmission;CULTURED MYENTERIC NEURONS; SHORT-TERM CULTURES; GUINEA-PIG; INTERNATIONAL UNION; N-ETHYLMALEIMIDE; ION CHANNELS; ATP RECEPTOR; MAST-CELLS; CROSS-TALK; 5-HYDROXYTRYPTAMINE SO - American Journal of Physiology-Gastrointestinal and Liver Physiology 2002 ;283(6):G1238-G1248 4813 UI - 11166 AU - Barandiaran JM AU - Garcia-Arribas A AU - Munoz JL AU - Kurlyandskaya GV AU - Valenzuela R AD - Univ Pais Vasco UPV EHU, Dept Elect & Elect, Bilbao 48080, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoBarandiaran, JM, Univ Pais Vasco UPV EHU, Dept Elect & Elect, POB 644, Bilbao 48080, Spain TI - Domain wall permeability limit for the giant magnetoimpedance effect AB - The magnetoimpedance (MI) effect is based on the change of inductance and resistance under the effect of an external magnetic field. In bulk homogeneous wires or ribbons these two components of the impedance are related to the penetration depth of the electromagnetic field in the material. From simple considerations it is shown that the maximum MI ratio is then proportional to the square root of the relative permeability of the material. That limit is reached for frequencies at which the penetration depth is of the order of the transverse dimensions of the sample. At low operating frequencies, typical of thick geometries, the permeability is limited by the microeddy currents associated with domain wall displacements. The permeability relaxation equivalent to these local eddy currents can be calculated and used in the classical expressions for MI. The real part of the permeability is highly reduced at the relaxation frequency and gives rise to a decrease of the inductance, while the imaginary part contributes to the resistance, with a maximum at the same frequency. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000175575100211 L2 - AMORPHOUS WIRES; MAGNETO-IMPEDANCE; FILMS SO - Journal of Applied Physics 2002 ;91(10):7451-7453 4814 UI - 9900 AU - Barboza-Flores M AU - Melendrez R AU - Chernov V AU - Castaneda B AU - Pedroza-Montero M AU - Gan B AU - Ahn J AU - Zhang Q AU - Yoon SF AD - Univ Sonora, Ctr Invest & Fis, Hermosillo 83190, Sonora, MexicoCICESE, Program Posgrado & Fis Mat, Ensenada 22800, Baja California, MexicoNanyang Technol Univ, Microelect Ctr, Singapore 639798, SingaporeBarboza-Flores, M, Univ Sonora, Ctr Invest & Fis, POB 5-088, Hermosillo 83190, Sonora, Mexico TI - Thermoluminescence in CVD diamond films: Application to actinometric dosimetry AB - Diamond is considered a tissue-equivalent material since its atomic number (Z = 6) is close to the effective atomic number of biological tissue (Z = 7.42). Such a situation makes it suitable for radiation detection purposes in medical applications. In the present work the analysis is reported of the thermoluminescence (TL) and dosimetric features of chemically vapour deposited (CVD) diamond film samples subjected to ultraviolet (UV) irradiation in the actinometric region. The TL glow curve shows peaks at 120, 220, 320 and 370degreesC. The 120 and 370degreesC peaks are too weak and the first one fades away in a few seconds after exposure. The overall room temperature fading shows a 50% TL decay 30 min after exposure. The 320degreesC glow peak is considered to be the most adequate for dosimetric applications due to its low fading and linear TL behaviour as a function of UV dose in the 180-260 nm range. The TL excitation spectrum presents a broad band with at least two overlapped components around 205 and 220 nm. The results indicate that the TL behaviour of CVD diamond film can be a good alternative to the currently available dosemeter and detector in the actinometric region as well as in clinical and medical applications MH - Mexico|Baja California MH - Mexico|Sonora MH - Singapore PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899600098 SO - Radiation Protection Dosimetry 2002 ;100(1-4):443-446 4815 UI - 11405 AU - barca-Arenas LG AU - Ulanowicz RE AD - Ctr Ecol & Pesquerias, Veracruz 91000, MexicoUniv Maryland Syst, Chesapeake Biol Lab, Solomons, MD 20688, USAAbarca-Arenas, LG, Ctr Ecol & Pesquerias, Apartado Postal 663 CP, Veracruz 91000, Mexico TI - The effects of taxonomic aggregation on network analysis AB - In their search for ever better trophic models, ecologists have often tried aggregating the number of species in order to better focus upon the variables that most interest them. Previous attempts at aggregating food webs have yielded varied results. We studied a series of different taxonomic aggregations on the same trophic network model of the Chesapeake Bay. The original 50-compartment model, which served as the control configuration, exhibited the highest value for the ascendency index. As expected, in those systems with fewer compartments the ascendency declined in monotonic fashion. The ascendency dropped precipitously for systems with fewer than 40 compartments and achieved its lowest value for systems with less than 29. Systems with the same number of compartments but different aggregations of species yielded different values of the ascendency. The aggregation of bacteria and ciliates resulted in a precipitous drop in the information of the network, revealing perhaps the significance of the microbial loop. Direct and indirect trophic impacts were also affected by the nature of the aggregation.. and the impacts seemed to be exaggerated whenever species were lumped into single compartments. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000174910900006 L2 - ascendency;network analysis;Chesapeake Bay;trophic impact;FOOD-WEB STRUCTURE; MESOHALINE CHESAPEAKE BAY; GROWTH-RATES; ECOSYSTEM; PHYTOPLANKTON; ZOOPLANKTON; POPULATIONS; PREDATION; MICROZOOPLANKTON; ECOLOGY SO - Ecological Modelling 2002 ;149(3):285-296 4816 UI - 11515 AU - Barcena-Gama R AU - Swingle RS AU - Moore JA AU - Poore MH AD - Colegio Postgrad, Especialidad Ganaderia Montecillo Mexico, Mexico City 56230, DF, MexicoUniv Arizona, Dept Anim Sci, Tucson, AZ 85721, USABarcena-Gama, R, Colegio Postgrad, Especialidad Ganaderia Montecillo Mexico, Km 36 5, Mexico City 56230, DF, Mexico TI - Effect of roughage source on ruminal kinetics and passage of individual feed components in finishing diets for steers AB - Two 4 x 4 Latin square experiments were conducted to determine the effect of substituting chopped alfalfa hay (AH) in a diet containing 10% AH (DM basis) for chopped wheat straw (WS), chopped bermudagrass straw (BS) or cottonseed hulls (CSH), on diet utilization and kinetics of ruminal digestion and passage of roughage and grain. In experiment 1, total tract digestion coefficients for dry Matter (DM), neutral detergent fiber (NDF) and starch were determined. Particulate passage rates for grain and roughages in each diet (rare earth metals) and liquid dilution rate (Co-EDTA) were also measured. In experiment 2, four mature ruminally cannulated steers were used to determine kinetics of in situ ruminal digestion of DM, NDF and starch for milo and roughage components of the diets. Replacing AH by low quality roughages depressed (P<0.05) total tract digestion of DM and NDF but not for starch. Potential extent of digestion (72 h in situ) of DM for milo was lower (P<0.05) in the CSH diet. The extent of digestion for DM and NDF were higher (P<0.05) for AH than for the lower quality roughages. Diets containing WS or BS promoted a higher (P<0.05) raft formation than AH or CSH diets. The AERD for DM and NDF from milo was not affected (P>0.05) by roughage source and ruminal pH did not differ (P>0.05) among diets. These results suggest that substitution of AH for low quality roughages depresses total tract digestibilty and that the effect on kinetics of ruminal digestion and passage for the grain fraction was minimal. However, the data also suggest that inclusion of WS in 90% concentrate diets may function to improve rumen conditions for NDF digestion and to reduce the incidence of metabolic acidosis MH - Mexico|Distrito Federal MH - USA PB - IZATNAGAR: GARUDA SCIENTIFIC PUBLICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0971-2119 UR - ISI:000174658900012 L2 - roughage;rate of passage;rate of digestion;starch;steers;NEUTRAL DETERGENT FIBER; ALFALFA HAY; DIGESTION; YTTERBIUM; FECES; RUMEN; COWS SO - Journal of Applied Animal Research 2002 ;21(1):109-121 4817 UI - 9380 AU - Barkovich M AU - D'Olivo JC AU - Montemayor R AU - Zanella JF AD - Univ Nacl Autonoma Mexico, Dept Fis Altas Energias, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCNEA, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaBarkovich, M, Univ Nacl Autonoma Mexico, Dept Fis Altas Energias, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Neutrino oscillation mechanism for pulsar kicks reexamined AB - Anisotropic neutrino emission during neutron star formation can be the origin of the observed proper motions of pulsars. We derive a general expression for the momentum asymmetry in terms of the neutrino energy flux gradient, and show that a nonvanishing effect is induced at the lowest order by a deformed neutrinosphere. In particular, this result is valid for a neutrino flux transported through a spherical atmosphere with constant luminosity MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000180317800012 L2 - EQUIVALENCE PRINCIPLE; MAGNETIC-FIELD; EARLY UNIVERSE; VELOCITIES; VIOLATION; CONVERSIONS; SUPERNOVAE SO - Physical Review D 2002 ;66(12): 4818 UI - 9933 AU - Barlandas-Rendon E AU - Muller MM AU - Garcia-Latorre E AU - Heinschink A AD - IPN, ENCB, Dept Inmunol, Mexico City 07738, DF, MexicoLab Diagnost Kaiser Franz Josef Spital, Vienna, AustriaGarcia-Latorre, E, Apartado Postal 238 CO Naranjo, Mexico City 06400, DF, Mexico TI - Comparison of urine cell characteristics by flow cytometry and cytology in patients suspected of having bladder cancer AB - The diagnosis of bladder cancer is confirmed by histological analysis of tissue biopsies. Cytology of urine samples is a noninvasive alternative. The aim of this work was to find out whether flow cytometry of urine samples is more sensitive than cytology. For this purpose we studied 115 patients suspected of having bladder cancer. Cells isolated from urine samples were analyzed by cytometry for the expression of cytokeratin and CD 45 and for DNA measurements such as: DNA index, synthesis phase fraction and proliferative index (SPF + G2/M phase). At the same time we carried out cytological analysis. All positive cases were confirmed by histology (21/115), 18 were diagnosed by flow cytometry and 16 by cytology, with a sensitivity of 85.7% and 76.1%, respectively. Two cases were found to be positive by flow cytometry, which were not confirmed by histology, while no false positives were detected by cytology. We found that both techniques gave almost identical results for the diagnosis of bladder cancer, although there were differences in nonmalignant samples. In conclusion, flow cytometry is slightly more sensitive than cytology but the combination of the two techniques improves the diagnosis MH - Austria MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 2 U4 - Medical Laboratory Technology U5 - J;Article AV - English IS - 1434-6621 UR - ISI:000177736900014 L2 - flow cytometry;cytology;bladder cancer;cytokeratin;CD 45;DNA index;TISSUE-SPECIFIC MARKERS; S-PHASE FRACTION; VOIDED URINE; DNA CONTENT; UROLOGICAL CANCERS; CARCINOMA; NEOPLASMS; TUMORS; SPECIMENS; GRADE SO - Clinical Chemistry and Laboratory Medicine 2002 ;40(8):817-823 4819 UI - 7999 AU - Barndorff-Nielsen OE AU - Perez-Abreu V AD - Ctr Math Phys & Stochast, DK-8000 Aarhus C, DenmarkCtr Invest Matemat AC, Guanajuato, MexicoBarndorff-Nielsen, OE, Ctr Math Phys & Stochast, Ny Munkegade, DK-8000 Aarhus C, Denmark TI - Extensions of type G and marginal infinite divisibility AB - We say that a random variate on a Euclidean space is marginal infinitely divisible with respect to a class of linear mappings on that space if each of these mappings results in an infinitely divisible random variate. Special cases are applied in a multivariate extension of the concept of type G probability laws. Random nonnegative matrices play a central role MH - Denmark MH - Mexico|Guanajuato PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0040-585X UR - ISI:000183800700003 L2 - inverse Wishart distribution;matrix inverse Gaussian law;multivariate normal inverse Gaussian law;multivariate stable laws;random positive definite matrices;self-decomposability;SELF-DECOMPOSABILITY; DISTRIBUTIONS; STABILITY; LAWS SO - Theory of Probability and Its Applications 2002 ;47(2):202-218 4820 UI - 10812 AU - Barnes-Regueiro F AU - Leach M AU - Ruth M AD - Univ London Imperial Coll Sci Technol & Med, TH Huxley Sch Environm, Energy & Environm Policy Management Grp, London SW7 2PE, EnglandUniv Maryland, Sch Publ Affairs, College Pk, MD 20742, USABarnes-Regueiro, F, Porfirio Diaz 136,Casa 10,Colonia Valle, Mexico City 03100, DF, Mexico TI - The Mexican energy sector: integrated dynamic analysis of the natural gas/refining system AB - Environmental regulations in Mexico could dramatically increase demand for natural gas in the following years. This increase could lead to gas price shocks and a counter-intuitive increase in carbon emissions. The effect would be accentuated if Mexico lacks the funds required to carry on with investments in gas development and processing capacity. With the use of a dynamic computer model, this study addresses responses of the Mexican oil and gas industries to perturbations such as: changes in regulatory and environmental policies; changes in institutional arrangements such as those arising from market liberalization; and lack of availability of investment funds. The study also assesses how regulatory policies can be designed to minimize the economic inefficiencies arising from the business cycle disruptions that some perturbations may cause. In addition, this study investigates how investment responses will shape the Mexican energy sector in the future, particularly with respect to both the relative importance of different fuels for power generation and heating purposes and the nature of competition in the Mexican natural gas market. Furthermore, this study explores the direct consequences of these responses on the level of carbon emissions. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Energy & Fuels;Environmental Sciences;Environmental Studies U5 - J;Article AV - English IS - 0301-4215 UR - ISI:000176637200005 L2 - natural gas;refining;dynamic modelling;ENTRY-DETERRENCE; OPEN ACCESS; GAS MARKET; ELECTRICITY; INVESTMENT; CAPACITY; MODEL; PRIVATIZATION; DEREGULATION; INDUSTRY SO - Energy Policy 2002 ;30(9):767-779 4821 UI - 10950 AU - Baron B AU - Buckle F AU - Espina S AD - Ctr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Ensenada, Baja California, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Lab Ecofisiol, Mexico City 04510, DF, MexicoBaron, B, CICESE, Dept Aquaculture, POB 434844, San Diego, CA 92143, USA TI - Environmental factors and sexual differentiation in Poecilia sphenops Valenciennes (Pisces : Poeciliidae) AB - Because environmental factors play an important role in the sexual proportions in fish and given that the studies that evaluate the interactions of such factors are scarce, the purpose of this work was to determine the combined effect of pH/temperature (23, 26 and 29 degreesC; pH 6, 7 and 8) on sex determination of Poecilia sphenops Valenciennes. The trial started with newborn organisms (n = 180) that were maintained in aquaria for 6 months until they could be separated by sex. Afterwards, nine groups of four females (0.81-1.48 g) and two males (0.36-0.63 g) were distributed in 20-L aquaria until fertilization, gestation and offspring birth took part. The offspring were grown under the same conditions until they reached sexual maturity. The results indicated the strong interaction of the factors (P < 0.05) with a lower male/female ratio at pH 7 both at 23 degreesC (M/F = 0.12) as well as at 30 degreesC (M/F = 0.10) and higher ratios at pH 8 at similar temperatures (M/F = 0.7) to 23 degreesC and (M/F = 0.6) to 26 degreesC. The females dominated in all the combinations; the least favourable combinations were 23 and 26 degreesC at pH 8 with 0.7 and 0.6 M/F ratios respectively. The results obtained in the laboratory explain very closely the behaviour of the population of P. sphenops from Oaxaca in the natural environment that can be used in aquaculture for baitfish production and also for aquaculture purposes MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000176212700008 L2 - temperature;pH sex determination;sexual ratio;REVERSAL; FISH SO - Aquaculture Research 2002 ;33(8):615-619 4822 UI - 9944 AU - Barquero R AU - Mendez R AU - Iniguez MP AU - Vega HR AU - Voytchev M AD - Hosp Univ Rio Hortega, Dept Protecc Radiol, Valladolid, SpainUniv Valladolid, Dept Fis Teor & Atom Mol & Nucl, Valladolid, SpainCtr Reg Estudios Nucl, Zacatecas, MexicoBarquero, R, Hosp Univ Rio Hortega, Dept Protecc Radiol, Valladolid, Spain TI - Thermoluminescence measurements of neutron dose around a medical linac AB - The photoneutron ambient dose around a 18 MV medical electron lineal accelerator has been measured with LiF:Mg,Ti chips of 3 X 3 X I nun inside moderating spheres. During the measurements a water phantom was irradiated in a field of 40 X 40 cm(2). Two methods have been considered for comparison. In the first, a TLD-600/TLD-700 pair at the centre of a 25 cm diameter paraffine sphere was used, with the system behaving as a rein meter. In the second method, TLD-600/TLD-700 pairs, bare and at the centre of 7.6, 12.7, 20.3 25.4, and 30.5 cm diameter polyethylene Bonner spheres Were used to obtain the neutron spectrum. This was unfolded using the BUNKIUT code with the SPUNIT algorithm and the UTA4 and ARKI response functions. The neutron dose was followed by Multiplying the unfolded neutron spectrum by the ambient dose equivalent to neutron fluence conversion factors. Both methods result in 0.5 mSv. Gy(-1) 1 m away from the isocentre MH - Mexico|Zacatecas MH - Spain PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899900101 L2 - SPECTRA SO - Radiation Protection Dosimetry 2002 ;101(1-4):493-496 4823 UI - 10999 AU - Barrado E AU - Prieto F AU - Garay FJ AU - Medina J AU - Vega M AD - Univ Valladolid, Dept Quim Analit, Fac Ciencias, E-47005 Valladolid, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoUniv Valladolid, Dept Fis Mat Condensada Cristalog & Mineral, Fac Ciencias, E-47005 Valladolid, SpainBarrado, E, Univ Valladolid, Dept Quim Analit, Fac Ciencias, Prado Magdalena S-N, E-47005 Valladolid, Spain TI - Characterization of nickel-bearing ferrites obtained as by-products of hydrochemical wastewater purification processes AB - The efficiency of the 'ferrite process' for the purification of wastewater heavily contaminated with nickel is evaluated, and the solid residues formed are characterised. The efficiency of the purification process is always above 99.9% for Fe2+/Ni2+ ratios greater than 3. The tested Fe2+/Ni2+ molar ratios (15/1, 7/1 and 3/1) yielded three different nickel ferrites. Inductively-coupled plasma atomic emission spectroscopy (ICP-AES), potentiometric titration, X-ray fluorescence (XRF), X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) yielded (NixFe1-xFe2O4)-Fe-II-O-III (x = 0.18, 0.40 and 0.65, respectively) as the most probable stoichiometry, and inverse spinel as the most probable structure. Heating at 600 degreesC causes the transformation of the solids into a mixture of NiFe2O4, alpha-Fe2O3 and NiO. Electrochemical analysis of the solid nickel ferrites was performed using carbon paste electrodes (CPEs) in HClO4 and HCl media. In each case, the First cyclic voltammogram showed the participation of solid species in the electrochemical transformation process, since the shape of the redox peaks could be related to the structure and stoichiometry of the ferrites. In second and successive scans. the voltammograms indicated the redox couples Fe-ads(3+) + 1e(-) double left right arrow Fe-ads(2+) (0.525 V vs. Ag/AgCl) and Ni-ads(2+) +2e(-) double left right arrow Ni(s) (-0.470 V) in HClO4, and FeCl2.ads+ + 1e(-) double left right arrow FeClads+ + Cl- (0.475 V) and NiClx.ads(x-2)- 2e(-) double left right arrow Ni(s) + xCl(-) (- 0.550 V) in HCl. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000176022400011 L2 - nickel;wastewater treatment;nickel ferrites;voltammetry;carbon paste electrode;CARBON-PASTE ELECTRODE; ELECTROCHEMICAL-BEHAVIOR; WATER; PRECIPITATION SO - Electrochimica Acta 2002 ;47(12):1959-1965 4824 UI - 11602 AU - Barrado E AU - Prieto F AU - Medina J AU - Lopez FA AD - Fac Ciencias, Dept Quim Anal, Valladolid 47005, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoFac Ciencias, Dept Fis Mat Condensada Cristalog & Mineral, Valladolid 47005, SpainCtr Nacl Invest Met, Dept Reciclado Mat, CESIC, E-28040 Madrid, SpainBarrado, E, Fac Ciencias, Dept Quim Anal, Valladolid 47005, Spain TI - Characterisation of solid residues obtained on removal of Cr from waste water AB - This investigation was designed to characterise the solid residues obtained when waste water heavily contaminated with Cr3+ is purified by the 'ferrite precipitation method' and to evaluate the efficiency of the process using different starting Fe2+/Cr3+ ratios. In the case of Cr(VI) contamination, to avoid altering the proportions, the Cr6+ was reduced to Cr3+ in a preliminary step, and the same procedure applied. The solid compounds obtained were subjected. to X-ray fluorescence and chemical analysis (inductively coupled plasma and potentiometric titrations). Findings suggest CrxFe2+Fe2-x3+O4 as the most probable stoichiometry of the products, where 0.09less than or equal toxless than or equal to0.59. X-ray diffractometry, differential scanning calorimetry and Fourier transform infrared patterns indicated a 'normal spinel' structure corresponding to 'chromite-type' chromium iron oxides. This structure differs considerably from that of divalent metal-bearing ferrites ('inverse spinel') and constitutes a new hydrothermal pathway for the generation of 'non-stoichiometric chromites'. The following is proposed as the general oxide formation reaction: a Fe2+ + x Cr3+ + b OH- + c O-2 --> CrxFe3-xO4 + Fe2O3.nH(2)O. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000174334800039 L2 - oxide materials;liquid-solid reaction;precipitation;TAGUCHI EXPERIMENTAL-DESIGN; AQUEOUS SUSPENSION; BEARING FERRITE; AIR OXIDATION; PURIFICATION; PRECIPITATION; OPTIMIZATION SO - Journal of Alloys and Compounds 2002 ;335(1-2):203-209 4825 UI - 9581 AU - Barranco J AU - Miranda OG AU - Rashba TI AU - Semikoz VB AU - Valle JWF AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoRussian Acad Sci, Inst Terr Magnetism Ionosphere & Radio Wave Propa, Troitsk, Moscow Region, RussiaUniv Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, SpainBarranco, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Confronting spin flavor solutions of the solar neutrino problem with current and future solar neutrino data AB - A global analysis of spin flavor precession (SFP) solutions to the solar neutrino problem is given, taking into account the impact of the full set of latest solar neutrino data, including the recent SNO data and the 1496-day Super-Kamiokande data. These are characterized by three effective parameters: Deltam(SOL)(2)equivalent toDeltam(2), the neutrino mixing angle theta(SOL)equivalent totheta, and the magnetic field parameter muB(perpendicular to). For the last we adopt a self-consistent magnetohydrodynamics field profile in the convective zone and identify an optimum B(perpendicular to)similar to80 kG strength for mu=10(-11)mu(B). We find that no low mass (LOW) quasivacuum or vacuum solutions are present at 3sigma. In addition to the standard large mixing angle (LMA) oscillation solution, there are two SFP solutions, in the resonant (RSFP) and nonresonant (NRSFP) regimes. These two SFP solutions have a goodness of fit of 84% (RSFP) and 83% (NRSFP), slightly better than the LMA oscillation solution (78%). We discuss the role of solar antineutrino searches in the fit and present a table of best-fit parameters and chi(min)(2) values. Should the KamLAND experiment confirm the LMA solution, the SFP solutions may at best be present at a subleading level, leading to a constraint on muB(perpendicular to). In the event the LMA is not the solution realized in nature, then experiments such as Borexino can help in distinguishing the LMA solution from the NRSFP solution and the simplest RSFP solution with no mixing MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000179679400014 L2 - SUPER-KAMIOKANDE; CAPTURE RATE; PRECESSION; DEUTERON; FLUX; OSCILLATIONS; SCATTERING; B-8; GNO; SUN SO - Physical Review D 2002 ;66(9): 4826 UI - 10589 AU - Barraza-Villarreal A AU - Farias P AU - de Jager D AU - Hernandez-Avila M AU - Dewailly E AU - Ayotte P AU - az-Sanchez V AD - Univ Pretoria, ZA-0002 Pretoria, South AfricaCtr Sante Pub Quebec, Serv Sante & Environm, Quebec City, PQ, CanadaInst Nacl Nutr, Mexico City, DF, Mexico TI - Non-occupational determinants of serum DDT and p,p'DDE in men from Chiapas, Mexico MH - Canada MH - Mexico|Distrito Federal MH - South Africa PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600829 SO - Epidemiology 2002 ;13(4):S242-S242 4827 UI - 10504 AU - Barrera AM AU - Ramirez JA AU - Gonzalez-Cabriales JJ AU - Vazquez M AD - Univ Santiago de Compostela, Dept Quim Analit, Area Tecnol Alimentos, Escuela Politecn Super, Lugo 27002, SpainUniv Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Tamaulipas 88700, MexicoVazquez, M, Univ Santiago de Compostela, Dept Quim Analit, Area Tecnol Alimentos, Escuela Politecn Super, Campus Lugo, Lugo 27002, Spain TI - Effect of pectins on the gelling properties of surimi from silver carp AB - Protein-carbohydrate interactions affect the functional properties in foods where proteins are the major ingredients, such as meat and fish processed products. The objective of this work was to evaluate the effect of pectin gum with different degree of methoxylation and calcium chloride on the mechanical properties of surimi gels. Surimi from silver carp was supplemented with pectin gum at 1% (w/w). Four high methoxyl pectins and two low methoxyl pectins were evaluated. Calcium chloride was added at 0.2%. Changes on shear stress, shear strain at failure, texture profile analysis and water holding capacity were evaluated. LM35, an amidated low methoxyl pectin, improved shear stress, hardness, and water holding capacity, while the four high methoxyl pectin and the no amidated low methoxyl pectin did not improved the mechanical properties of surimi gels as compared with the control. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000177462100006 L2 - pectin;surimi;calcium;silver carp;gel;THERMAL GELATION; FROZEN STORAGE; PROTEINS; TRANSGLUTAMINASE; GELS SO - Food Hydrocolloids 2002 ;16(5):441-447 4828 UI - 10875 AU - Barriga J AU - Gaztanaga E AD - IEEC, ICE, CSIC, Barcelona 08034, SpainINAOE, Astrofis, Puebla 7200, MexicoUniv Barcelona, Dept Fis Fonamental, E-08028 Barcelona, SpainBarriga, J, IEEC, ICE, CSIC, Edf Nexus 201,C Gran Capita 2-4, Barcelona 08034, Spain TI - The three-point function in large-scale structure - I. The weakly non-linear regime in N-body simulations AB - This paper presents a comparison of the predictions for the two- and three-point correlation functions of density fluctuations, xi and zeta, in gravitational perturbation theory (PT) against large cold dark matter (CDM) simulations. This comparison is made possible for the first time on large weakly non-linear scales (>10 h(-1) Mpc) thanks to the development of a new algorithm for estimating correlation functions for millions of points in only a few minutes. Previous studies in the literature comparing the PT predictions of the three-point statistics with simulations have focused mostly on Fourier space, angular space or smoothed fields. Results in configuration space, such as those presented here, were limited to small scales where leading-order PT gives a poor approximation. Here we also propose and apply a method for separating the first-order and subsequent contributions to PT by combining different output times from the evolved simulations. We find that in all cases there is a regime where simulations do reproduce the leading-order (tree-level) predictions of PT for the reduced three-point function Q(3) similar tozeta/xi(2). For steeply decreasing correlations (such as the standard CDM model) deviations from the tree-level results are important even at relatively large scales, similar or equal to20 Mpc h (-1) . On larger scales xi goes to zero and the results are dominated by sampling errors. In more realistic models (such as the LambdaCDM cosmology) deviations from the leading-order PT become important at smaller scales r similar or equal to 10 Mpc h(-1), although this depends on the particular three-point configuration. We characterize the range of validity of this agreement and show the behaviour of the next-order (one-loop) corrections MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000176299500024 L2 - methods : N-body simulations;large-scale structure of Universe;3-POINT CORRELATION-FUNCTION; COLD DARK-MATTER; EXTRAGALACTIC OBJECTS; STATISTICAL-ANALYSIS; PERTURBATION-THEORY; COSMIC STRINGS; CATALOGS; INFLATION; BISPECTRUM; EVOLUTION SO - Monthly Notices of the Royal Astronomical Society 2002 ;333(2):443-453 4829 UI - 10333 AU - Barrio RA AU - Maini PK AU - Aragon JL AU - Torres M AD - Univ Oxford, Inst Math, Ctr Math Biol, Oxford OX1 3LB, EnglandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUNAM, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, MexicoConsejo Super Invest Cientificas, Inst Fis Aplicada, Madrid 28006, SpainMaini, PK, Univ Oxford, Inst Math, Ctr Math Biol, 24-29 St Giles, Oxford OX1 3LB, England TI - Size-dependent symmetry breaking in models for morphogenesis AB - A general property of dynamical systems is the appearance of spatial and temporal patterns due to a change of stability of a homogeneous steady state. Such spontaneous symmetry breaking is observed very frequently in all kinds of real systems, including the development of shape in living organisms. Many nonlinear dynamical systems present a wide variety of patterns with different shapes and symmetries. This fact restricts the applicability of these models to morphogenesis, since one often finds a surprisingly small variation in the shapes of living organisms. For instance, all individuals in the Phylum Echinodermata share a persistent radial fivefold symmetry. In this paper, we investigate in detail the symmetry-breaking properties of a Turing reaction-diffusion system confined in a small disk in two dimensions. It is shown that the symmetry of the resulting pattern depends only on the size of the disk, regardless of the boundary conditions and of the differences in the parameters that differentiate the interior of the domain from the outer space. This study suggests that additional regulatory mechanisms to control the size of the system are of crucial importance in morphogenesis. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000177751200007 L2 - pattern formation;reaction-diffusion system;morphogenesis;mathematical biology;SPATIAL PATTERN-FORMATION; TURING PATTERNS; SELECTION; SYSTEMS SO - Physica D-Nonlinear Phenomena 2002 ;168():61-72 4830 UI - 11444 AU - Barrios-de-Tomasi J AU - Timossi C AU - Merchant H AU - Quintanar A AU - Avalos JM AU - Andersen CY AU - Ulloa-Aguirre A AD - Univ Nacl Autonoma Mexico, Res Unit Reprod Med, Hosp Ginecobstetricia Luis Castelazo Ayala, Inst Mexicano Seguro Social, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Autonoma Aguascalientes, Ctr Basico, Dept Physiol & Pharmacol, Aguascalientes, MexicoCopenhagen Univ Hosp, Juliane Marie Ctr Children Women & Reprod, Reprod Biol Lab, Sect 5712, Copenhagen, DenmarkUlloa-Aguirre, A, Univ Nacl Autonoma Mexico, Res Unit Reprod Med, Hosp Ginecobstetricia Luis Castelazo Ayala, Inst Mexicano Seguro Social, Apdo Postal 99-065,10101 Unidad Independencia DF, Mexico City, DF, Mexico TI - Assessment of the in vitro and in vivo biological activities of the human follicle-stimulating isohormones AB - Gonadotropins are synthesized and released in different molecular forms. In this article, we present evidence that the glycosylation variants of human pituitary FSH exhibit differential and divergent effects at the target cell level and that less sialylated, short-lived variants may exert significant effects in in vivo conditions. Less acidic/sialylated glycoforms (elution pH value 6.60-4.60 as disclosed by high resolution chromatofocusing of anterior glycoprotein extracts), induced higher cAMP release, estrogen production and tissue-type plasminogen activator (tPA) enzyme activity as well as cytochrome P450 aromatase and tPA mRNA expression in cultured rat granulosa cells than the more acidic analogs (pH < 4.76). By contrast, the more acidic /sialylated glycoforms induced higher a-inhibin subunit mRNA expression than their less acidic counterparts. In cumulus enclosed oocytes isolated from mice ovaries, addition of less acidic isoforms induced resumption of meiosis more efficiently than the more acidic analogs. Interestingly, the least acidic isoform (pH > 7.10) behave as a strong antagonist of several FSH-mediated effects. Assessment of the in vivo effects of the isoforms on granulosa cell proliferation in follicles from immature rats, revealed that short-lived isoforms were equally or even more efficient than their more acidic counterparts in maintaining granulosa cell proliferation when administered immediately after hypophysectomy. These results show that the naturally occuring human FSH isoforms may exhibit differential or even unique effects at the target cell level and that factors other than the metabolic clearance rate of the molecule (including receptor-binding affinity and capability of the ligand to activate its receptor and trigger intracellular signaling) also play an important role in determining the net in vivo effects of a particular FSH variant. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Denmark MH - Mexico|Aguascalientes MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 19 U4 - Cell Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0303-7207 UR - ISI:000174818900012 L2 - follicle-stimulating hormone;carbohydrates;oligosaccharides;glycoprotein hormones;HUMAN LUTEINIZING-HORMONE; IN-VITRO; SIGNAL-TRANSDUCTION; HUMAN PITUITARY; HUMAN FSH; ISOFORMS; CHARGE; VARIANTS; BIOACTIVITY; RECEPTOR SO - Molecular and Cellular Endocrinology 2002 ;186(2):189-198 4831 UI - 10262 AU - Barton LF AU - Cruz M AU - Rangwala R AU - Deepe GS AU - Monaco JJ AD - Univ Cincinnati, Dept Med, Div Infect Dis, Cincinnati, OH 45267, USAUniv Cincinnati, Howard Hughes Med Inst, Cincinnati, OH 45267, USAHosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Inst Mexicano Seguro Social, Mexico City, DF, MexicoMonaco, JJ, Univ Cincinnati, Med Ctr, Dept Mol Genet, 231 Albert Sabin Way, Cincinnati, OH 45267 USA TI - Regulation of immunoproteasome subunit expression in vivo following pathogenic fungal infection AB - The proteasome catalytic beta subunits LMP2, LMP7, and MECL-I and two proteasome activator proteins, PA28 alpha and beta are induced following exposure to IFN-gamma in vitro. Induction of these immunosubunits and the PA28 alpha/beta hetero-oligomer alters proteasome catalytic functions and specificity and enhances production of certain MHC class I epitopes. We sought to determine whether and to what extent proteasome subunit composition is regulated in vivo and to elucidate the mechanisms of such regulation. We analyzed basal expression levels of these inducible genes in normal, IFN-gamma-deficient, and Stat-1-deficient mice. Mice of all three genotypes display constitutive expression of the immunosubunits and PA28, demonstrating that basal expression in vivo is independent of endogenous IFN-gamma production. However, basal expression levels are reduced in Stat-1(-/-) mice, demonstrating a role for Stat-1 independent of IFN-gamma signaling. To demonstrate that IFN-gamma can induce these genes in vivo, mice were infected with Histoplasma capsulatum. Elevated expression of these genes followed the same time course as IFN-gamma expression in infected mice. IFN-gamma-deficient mice did not display elevated protein expression following infection, suggesting that other inflammatory cytokines produced in infected mice are unable to influence proteasome expression. Cytokines other than IFN-gamma also failed to influence proteasome gene expression in vitro in cell lines that had no basal expression of LMP2, LMP7, or MECL-1. Thus, both in vitro and in vivo data demonstrate that IFN-gamma is essential for up-regulation, but not constitutive expression, of immunoproteasome subunits in mice MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 13 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000177958200032 L2 - MAJOR HISTOCOMPATIBILITY COMPLEX; TRANSCRIPTION FACTOR IRF-1; PROTEASOME ACTIVATOR PA28; CLASS-I EXPRESSION; INTERFERON-GAMMA; 20S PROTEASOME; GENE-EXPRESSION; HISTOPLASMA-CAPSULATUM; IMMUNE-RESPONSE; IFN-GAMMA SO - Journal of Immunology 2002 ;169(6):3046-3052 4832 UI - 9987 AU - Barton SC AU - Pickard M AU - Vazquez-Duhalt R AU - Heller A AD - Columbia Univ, Dept Chem Engn, New York, NY 10027, USAUniv Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, CanadaUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Texas, Dept Chem Engn, Austin, TX 78712, USABarton, SC, Columbia Univ, Dept Chem Engn, New York, NY 10027, USA TI - Electroreduction of O-2 to water at 0.6 V (SHE) at pH 7 on the 'wired' Pleurotus ostreatus laccase cathode AB - O-2 was electroreduced to water at 0.6 V (SHE) near neutral pH on the 'wired' Pleurotus ostreatus laccase cathode. We previously reported high-current density (5 mA cm(-2)), four-electron electroreduction of O-2 to water on a 'wired' Coriolus hirsutus laccase electrode at +0.7 V (SHE) in pH 5 in citrate buffer. Since the enzyme was inhibited by chloride and because its activity declined steeply when the pH was raised to neutral, the rate of O-2 electroreduction in a physiological buffer solution was only similar to 1% of that at pH 5 in absence of chloride. Here we show that substitution of the C hirsutus laccase by laccase from P. ostreatus allows the upward extension of the pH range of O-2 electroreduction. The current density of the electrode made with laccase from P. ostreatus in pH 7 citrate buffer was similar to 100 muA cm-2 and at pH 7 and in phosphate buffered NaCl (PBS, 20 mM phosphate, 0.1 M NaCl) it still retained 6% of its maximal (1 mA cm(-2)) current density at pH 5 in citrate buffer. The electrocatalyst consisted of the crosslinked P. ostreatus laccase and the electron conducting redox polymer PVI-Os(dmebpy)(tpy)(2+/3+) [PVI = poly(N-vinyl imidazole) with about 1/5th of the rings complexed with (Os-dmebpy-tpy)(2+/3+); dmebpy = 4,4'-dimethyl-2,2'-bipyridine; tpy = 2,2 6 2 -terpyridine]. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Morelos MH - USA PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 26 U4 - Biophysics;Biotechnology & Applied Microbiology;Chemistry, Analytical;Electrochemistry;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0956-5663 UR - ISI:000178791900020 L2 - enzymes;oxygen electrode;biofuel cells;sensors;FUNGI SO - Biosensors & Bioelectronics 2002 ;17(11-12):1071-1074 4833 UI - 9193 AU - Baruch I AU - Martinez AD AU - Garrido R AU - Nenkova B AD - IPN, CINVESTAV, Mexico City 07360, DF, MexicoBulgarian Acad Sci, IIT, BU-1113 Sofia, BulgariaBaruch, I, IPN, CINVESTAV, Ave IPN 2508,AP 14-470, Mexico City 07360, DF, Mexico TI - Direct adaptive neural control with integral-plus-state action AB - The paper applied a Recurrent Neural Network (RNN) model in two Integral-Plus-State (IPS) schemes of real-time adaptive neural control. The proposed control modify and extend a previously published direct adaptive neural control scheme with one or two I-control terms, so to obtain a neural, IPS adaptive, offset compensational and trajectory tracking control. The control scheme contains only two RNN models (systems identificator and IPS feedback controller) and not need a third feedforward RNN control model. The good performance of the adaptive neural IPS control is confirmed by comparative simulation results, obtained using a nonlinear multi-input multi-output plant, corrupted by noise. The results exhibits good convergence and noise resistance which not depend on the magnitude of the offset MH - Bulgaria MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000180979600010 L2 - NETWORKS SO - Artificial Intelligence: Methodology, Systems and Applications, Proceedings 2002 ;2443():91-100 4834 UI - 11282 AU - Baselga J AU - Castaneda-Soto NJ AU - Clemens M AU - Green M AU - Harvey V AU - Barton C AU - Morales S AD - Hosp Gen Valle Hebron, Dept Med Oncol, Barcelona, SpainInst Nacl Cancerol Clin Mama, Tialpan, MexicoMutterhaus Borromaeerinnen, Haematol Onkol, Trier, GermanyRoyal Melbourne Hosp, Dept Med Oncol, Melbourne, Vic, AustraliaAuckland Hosp, Dept Oncol, Auckland, New ZealandRoche Prod Ltd, Welwyn Garden City AL7 3AY, Herts, EnglandHosp Arnau Vilanova, Lleida, Spain TI - Safety of Herceptin monotherapy administered on a 3-weekly schedule: preliminary data from a phase II study in women with HER2-positive metastatic breast cancer MH - Australia MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - New Zealand MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 0959-8049 UR - ISI:000175052800218 SO - European Journal of Cancer 2002 ;38():S95-S95 4835 UI - 9709 AU - Bashan Y AU - de-Bashan LE AD - Ctr Biol Res NW CIB, Pa Paz 23000, BCS, MexicoPontificia Univ Javeriana, Dept Biol, Bogota, ColombiaBashan, Y, Ctr Biol Res NW CIB, POB 128, Pa Paz 23000, BCS, Mexico TI - Reduction of bacterial speck (Pseudomonas syringae pv. tomato) of tomato by combined treatments of plant growth-promoting bacterium, Azospirillum brasilense, streptomycin sulfate, and chemo-thermal seed treatment AB - Inoculation of tomato seeds with the plant growth-promoting bacterium Azospirillum brasilense, or spraying tomato foliage with A. brasilense, streptomycin sulfate, or commercial copper bactericides, separately, before or after inoculation with Pseudomonas syringae pv. tomato, the casual agent of bacterial speck of tomato, had no lasting effect on disease severity or on plant height and dry weight. Seed inoculation with A. brasilense combined with a single streptomycin foliar treatment and two foliar bactericide applications at 5-day intervals ( a third or less of the recommended commercial dose) reduced disease severity in tomato seedlings by over 90% after 4 weeks, and significantly slowed disease development under mist conditions. A. brasilense did not induce significant systemic resistance against the pathogen although the level of salicylic acid increased in inoculated plants. Treatment of tomato seeds that were artificially inoculated with P. syringae pv. tomato, with a combination of mild chemo-thermal treatment, A. brasilense seed inoculation, and later, a single foliar application of a copper bactericide, nearly eliminated bacterial leaf speck even when the plants were grown under mist for 6 weeks. This study shows that a combination of otherwise ineffective disease management tactics, when applied in concert, can reduce bacterial speck intensity in tomatoes under mist conditions MH - Colombia MH - Mexico|Baja California Sur PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0929-1873 UR - ISI:000179496800001 L2 - Azospirillum brasilense;bacterial leaf diseases;biological control;disease control;induced systemic resistance;plant growth-promoting bacteria;Pseudomonas syringae pv. tomato;seed treatment;SYSTEMIC RESISTANCE; DISEASE RESISTANCE; FIELD CONDITIONS; SALICYLIC-ACID; RHIZOSPHERE BACTERIA; INDUCTION; RHIZOBACTERIA; CUCUMBER; PEPPER; LEAVES SO - European Journal of Plant Pathology 2002 ;108(9):821-829 4836 UI - 10826 AU - Bashan Y AU - Li CY AU - Lebsky VK AU - Moreno M AU - de-Bashan LE AD - Ctr Biol Res NW CIB, La Paz 23000, Baja Calif Sur, MexicoUS Forest Serv, Pacific NW Res Stn, Forestry Sci Lab, USDA, Corvallis, OR 97331, USAPontificia Univ Javeriana, Dept Biol, Bogota, ColombiaBashan, Y, Ctr Biol Res NW CIB, POB 128, La Paz 23000, Baja Calif Sur, Mexico TI - Primary colonization of volcanic rocks by plants in arid Baja California, Mexico AB - In an and region of Baja California Sur, Mexico, field observations, combined with chemical and physical analyses, mineral analysis and scanning electron microscopy of unweathered and weathered volcanic rocks, revealed the presence of rock-colonizing plants (most are tree-shaped cacti, possibly rock weathering), growing in volcanic rocks without benefit of soil. Many are at the seedling stage. At least four cactus species (Pachycereus pringlei [S. Wats] Britt. and Ross, Stenocereus thurberi [Engelm.] Buxb. subsp. thurberi, Mamillaria fraileana [Britt. and Rose] Boed., Opuntia cholla F. A. C. Weber), and one tree (wild fig, Ficus palmeri [S. Wats]) were capable of cracking, growing in and colonizing cliffs and rocks formed from ancient lava flows and, consequently, forming soil for succession by other plant species. This study shows that plant colonization of volcanic rocks may assist soil formation, which eventually leads to accumulation of soil, water and nutrients in a desert terrestrial ecosystem that otherwise lacks these essential plant-growth variables MH - Colombia MH - Mexico|Baja California Sur MH - USA PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 1435-8603 UR - ISI:000176426800012 L2 - rock colonization;rock weathering;soil formation;rock-weathering cacti;RESOURCE-ISLAND SOILS; SONORAN DESERT; SOLUBILIZING MICROORGANISMS; PACHYCEREUS-PRINGLEI; PHOSPHATE ROCK; ORGANIC-ACIDS; GIANT CACTUS; RHIZOSPHERE; MYCORRHIZAL; ESTABLISHMENT SO - Plant Biology 2002 ;4(3):392-402 4837 UI - 11007 AU - Bashan Y AU - de-Bashan LE AD - Ctr Biol Res NW, CIB, La Paz, MexicoPontificia Univ Javeriana, Dept Biol, Bogota, ColombiaBashan, Y, Ctr Biol Res NW, CIB, POB 128,BCS 23000, La Paz, Mexico TI - Protection of tomato seedlings against infection by Pseudomonas syringae pv. tomato by using the plant growth-promoting bacterium Azospirillum brasilense AB - Pseudomonas syringae pv. tomato, the causal agent of bacterial speck of tomato, and the plant growth-promoting bacterium Azospirillum brasilense were inoculated onto tomato plants, either alone, as a mixed culture, or consecutively. The population dynamics in the rhizosphere and foliage, the development of bacterial speck disease, and their effects on plant growth were monitored. When inoculated onto separate plants, the A. brasilense population in the rhizosphere of tomato plants was 2 orders of magnitude greater than the population of P. syringae pv. tomato (10(7) versus 10(5) CFU/g [dry weight] of root). Under mist chamber conditions, the leaf population of P. syringae pv. tomato was 1 order of magnitude greater than that of A. brasilense (10(7) versus 10(6) CFU/g [dry weight] of leaf). Inoculation of seeds with a mixed culture of the two bacterial strains resulted in a reduction of the pathogen population in the rhizosphere, an increase in the A. brasilense population, the prevention of bacterial speck disease development, and improved plant growth. Inoculation of leaves with the mixed bacterial culture under mist conditions significantly reduced the P. syringae pv. tomato population and significantly decreased disease severity. Challenge with P. syringae pv. tomato after A. brasilense was established in the leaves further reduced both the population of P. syringae pv. tomato and disease severity and significantly enhanced plant development. Both bacteria maintained a large population in the rhizosphere for 45 days when each was inoculated separately onto tomato seeds (10(5) to 10(6) CFU/g [dry weight] of root). However, P. syringae pv. tomato did not survive in the rhizosphere in the presence of A. brasilense. Foliar inoculation of A. brasilense after P. syringae pv. tomato was established on the leaves did not alleviate bacterial speck disease, and A. brasilense did not survive well in the phyllosphere under these conditions, even in a mist chamber. Several applications of a low concentration of buffered malic acid significantly enhanced the leaf population of A. brasilense (> 10(6) CFU/g [dry weight] of leaf), decreased the population of P. syringae pv. tomato to almost undetectable levels, almost eliminated disease development, and improved plant growth to the level of uninoculated healthy control plants. Based on our results, we propose that A. brasilense be used in prevention programs to combat the foliar bacterial speck disease caused by P. syringae pv. tomato MH - Colombia MH - Mexico|Baja California Sur PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 18 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000176030100002 L2 - LINKED-IMMUNOSORBENT-ASSAY; DISEASE RESISTANCE; SYSTEMIC RESISTANCE; BIOLOGICAL-CONTROL; FIELD CONDITIONS; RHIZOBACTERIA; INOCULATION; LEAF; INDUCTION; CUCUMBER SO - Applied and Environmental Microbiology 2002 ;68(6):2637-2643 4838 UI - 11170 AU - Basin MV AU - Pinsky MA AD - Autonomous Univ Nuevo Leon, Dept Phys & Math Sci, Neuvo Leon, MexicoUniv Nevada, Dept Math, Reno, NV 89557, USABasin, MV, Autonomous Univ Nuevo Leon, Dept Phys & Math Sci, Apdo Postal 144-F CP 66450, Neuvo Leon, Mexico TI - Control of Kalman-like filters using impulse and continuous feedback design AB - This paper develops the observation control method for refining the Kalman-Bucy estimates, which is based on impulsive modeling of the transition matrix in an observation equation, thus engaging discrete-continuous observations. The impulse observation control generates on-line computable jumps of the estimate variance from its current position towards zero and, as a result, enables us to instantancously obtain the estimate, whose variance is closer to zero. The filtering equations over impulse-controlled observations are obtained in the Kalman-Bucy filtering problem. The method for feedback design of control of the estimate variance is developed. First, the pure impulse control is used, and, next, the combination of the impulse and continuous control components is employed. The considered examples allow us to compare the properties of these control and filtering methodologies MH - Mexico|Nuevo Leon MH - USA PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1531-3492 UR - ISI:000175553100002 L2 - Kalman filtering;impulse observation control;feedback design SO - Discrete and Continuous Dynamical Systems-Series B 2002 ;2(2):169-184 4839 UI - 9791 AU - Basiuk EV AU - Rybak-Akimova EV AU - Basiuk VA AU - costa-Najarro D AU - Saniger JM AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoTufts Univ, Dept Chem, Medford, MA 02155, USABasiuk, EV, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico TI - Adsorption modification of single-walled carbon nanotubes with tetraazaannulene macrocyclic complexes AB - Single-walled carbon nanotubes (SWNTs) strongly adsorb macrocyclic tetraazaannulene complexes NiTMTAA and CuTMTAA from ethanol solutions, with a SWNT/complex mass ratio of ca. 5:4. According to the results of molecular mechanics modeling, this corresponds to dense monolayer coverage. A saddle-shaped conformation of the macrocyclic complexes facilitates their better accommodation on the cylindrical nanotube walls, resulting in highly ordered molecular arrays MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000179301800014 L2 - SIDEWALL FUNCTIONALIZATION; OPTICAL-PROPERTIES; CONFINEMENT; DISSOLUTION; REACTIVITY; FULL SO - Nano Letters 2002 ;2(11):1249-1252 4840 UI - 11757 AU - Basiuk EV AU - Basiuk VA AU - Banuelos JG AU - Saniger-Blesa JM AU - Pokrovskiy VA AU - Gromovoy TY AU - Mischanchuk AV AU - Mischanchuk BG AD - Univ Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Acad Sci Ukraine, Inst Surface Chem, UA-03680 Kiev, UkraineBasiuk, EV, Univ Nacl Autonoma Mexico, Ctr Instrumentos, Apdo Postal 70-186, Mexico City 04510, DF, Mexico TI - Interaction of oxidized single-walled carbon nanotubes with vaporous aliphatic amines AB - The gas-phase derivatization procedure was employed for direct (i.e., without chemical activation of terminal carboxylic groups) amidization of oxidized single-walled carbon nanotubes (SWNTs) with simple aliphatic amines. The procedure includes treatment of SWNTs with amine vapors under reduced pressure and a temperature of 160-170 degreesC. Applicability of infrared (IR) spectroscopy and temperature-programmed desorption mass spectrometry (TPD-MS) for chemical characterization of the derivatized SWNTs was analyzed. It was concluded that IR spectra of oxidized SWNTs treated with amines under different conditions (described here and elsewhere) cannot correspond to amide derivatives on SWNT tips because of the very low concentration of the terminal groups relative to the whole sample mass, which implies a negligible contribution to the IR spectra. The bands detectable in the case of long-chain amines correspond to amine molecules physisorbed because of strong hydrophobic interactions of their hydrocarbon chains with SWNT walls. Energetically preferable adsorption sites are the channels inside SWNTs, according to MM+ molecular-mechanics modeling. TPD-MS provided additional information on the chemical state of the amines. Heating of the amine-treated SWNTs at >200 degreesC causes cleavage of alkenes from the amine residues: nonene and pentene form in the case of nonylamine and dipentylamine, respectively. For the short-chain amine (dipentylamine), only one chemical form was detected, whereas two forms (amide and physisorbed amine) can be distinguished for the SWNTs treated with nonylamine. The content of physisorbed nonylamine is about 1 order of magnitude higher than the amide content. According to the results of two-level ONIOM quantum-chemistry-molecular-mechanics calculations, the direct formation of amides on armchair SWNT tips is more energetically favorable than that on the zigzag tips, although the activation barriers are of approximately equal height MH - Mexico|Distrito Federal MH - Ukraine PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 60 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000173981900014 L2 - DESORPTION MASS-SPECTROMETRY; LIQUID-CHROMATOGRAPHY; STATIONARY PHASES; NITRIC-ACID; SURFACE SO - Journal of Physical Chemistry B 2002 ;106(7):1588-1597 4841 UI - 9575 AU - Basiuk VA AU - Bogillo VI AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. Natl Acad Sci Ukraine, Inst Surface Chem, Kiev, Ukraine TI - Theoretical study of amino acid precursor formation in the interstellar medium. I. Reaction of methylenimine with hydrogen cyanide AB - Search for amino acids and related compounds of prebiotic interest in the interstellar medium is one of the most challenging tasks for modem radio astronomy and astrobiology. Although no convincing detections of even the simplest amino acid glycine have been reported so far, rich organic chemistry of molecular clouds gives hope to expect even more complex species of prebiotic interest to be present in. the interstellar medium. Methylenimine (HN=CH2), definitively detected in several Galactic objects, has been suggested as a possible precursor for glycine and its nitrile. One can imagine different reaction pathways, but most probable are those involving abundant, commonly found organic species. One of such species is hydrogen cyanide HCN. From common considerations, its interaction with methylenimine might produce glycine nitrile (H2NCH2CN). Here we present the results of ab initio quantum chemical study of this reaction, performed using the hybrid B3LYP functional and 6-31++G** basis set. Three high energy transition states have been found, which make this reaction hardly feasible in the gas phase and suggest grain surface chemistry to be the only possible pathway for the glycine nitrile formation from methylenimine and HCN (if any). (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine T3 - SPACE LIFE SCIENCES: EXTRATERRESTRIAL ORGANIC CHEMISTRYAdvances in space research PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticle0THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDADV SPACE RESBV68R AV - English IS - 0273-1177 UR - ISI:000179771000006 SO - 2002 ;(6):1439-1444 4842 UI - 9576 AU - Basiuk VA AU - Bogillo VI AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. Natl Acad Sci Ukraine, Inst Surface Chem, Kiev, Ukraine TI - Theoretical study of amino acid precursor formation in the, interstellar medium. 2. Reaction of methylenimine with CN radical AB - Methylenimine (HN=CH2), recently identified in several Galactic objects, has been suggested as a possible precursor for glycine and its nitrile. Different reaction pathways leading to these compounds are imaginable, but most probable are those involving abundant interstellar organic species. For example, the reaction of methylenimine with HCN could produce in principle glycine nitrile. However, its theoretical study (previous work) found that such a reaction should pass through three high energy transition states, each of them by itself making the process hardly feasible in the gas phase. .CN radical is a good (in terms of abundance and chemical reactivity) alternative to HCN, and in the present work we tested feasibility of the reaction of .CN with methylenimine to form glycine nitrile radical H2N.CHCN, using B3LYP/6-31++G** level of theory. At the first step, a reaction complex forms whose rearrangement, into the product is hindered by a higher energy transition state. Nevertheless, the latter ties below the energy of the reactants, and the overall reaction is highly exothermic. The radical product formed can be considered as an important intermediate for the formation of a large variety of amino acid nitriles in the interstellar medium, through the recombination not only with hydrogen atoms, but also, with different hydrocarbon radicals. (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine T3 - SPACE LIFE SCIENCES: EXTRATERRESTRIAL ORGANIC CHEMISTRYAdvances in space research PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticle0THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDADV SPACE RESBV68R AV - English IS - 0273-1177 UR - ISI:000179771000007 SO - 2002 ;(6):1445-1450 4843 UI - 10429 AU - Basiuk VA AD - Yokohama Natl Univ, Fac Engn, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa 2408501, JapanBasiuk, VA, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Activity of carboxylic groups on armchair and zigzag carbon nanotube tips: A theoretical study of esterification with methanol AB - A theoretical study of gas-phase esterification of monocarboxy fragments of armchair (10,10) and zigzag (16,0) single-walled carbon nanotubes (SWNTs) with methanol was performed by using a two-level ONIOM approach. The results suggest that the reaction is favorable on armchair SWNT tips, contrary to that on the zigzag nanotube tips. Gas-phase esterification might be a route to selective derivatization of different forms of carbon nanotubes MH - Japan MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000177485500009 L2 - OPTICAL-PROPERTIES; DISSOLUTION; ENERGY SO - Nano Letters 2002 ;2(8):835-839 4844 UI - 10738 AU - Basiuk VA AU - Kobayashi K AU - Kaneko T AU - Negishi Y AU - Basiuk EV AU - Saniger-Blesa JM AD - Yokohama Natl Univ, Dept Chem & Biotechnol, Fac Engn, Hodogaya Ku, Yokohama, Kanagawa 2408501, JapanYokohama Natl Univ, Instrumental Anal Ctr, Hodogaya Ku, Yokohama, Kanagawa 2408501, JapanNatl Autonomous Univ Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoBasiuk, VA, Yokohama Natl Univ, Dept Chem & Biotechnol, Fac Engn, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan TI - Irradiation of single-walled carbon nanotubes with high-energy protons AB - Morphological changes in single-walled carbon nanotubes (SWNTs) upon bombardment with 3MeV protons were monitored by transmission electron microscopy in a wide range of irradiation doses. Evident morphological alterations were observed at >0.1 mC, such as curving of the nanotubes, a loss of their straight shape, and formation of short pieces. During further irradiation (doses approaching 1 mC) SWNTs degraded into an amorphous material, although a significant fraction of them were present as pieces of different lengths MH - Japan MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000176827500024 SO - Nano Letters 2002 ;2(7):789-791 4845 UI - 11990 AU - Bastos MA AU - Karlovich YI AU - dos Santos AF AD - Inst Super Tecn, Dept Matemat, P-1049001 Lisbon, PortugalInst Politecn Nacl, CINVESTAV, Dept Math, Mexico City 07000, DF, MexicoBastos, MA, Inst Super Tecn, Dept Matemat, Av Rovisco Pais, P-1049001 Lisbon, Portugal TI - The invertibility of convolution type operators on a union of intervals and the corona theorem AB - The invertibility of convolution type operators on unions of intervals is studied. Sufficient conditions of invertibility for some classes of those operators are established. Solvability results for n-term corona problems are obtained using two different approaches: one involving reduction to n - 1 Riemann-Hilbert problems in two variables and another involving reduction to two-term corona problems. The invertibility of the convolution operators on a union of intervals is also related to the invertibility of associated convolution operators on single intervals. Formulas for the inverse operators axe given MH - Mexico|Distrito Federal MH - Portugal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000173197800002 SO - Integral Equations and Operator Theory 2002 ;42(1):22-56 4846 UI - 10636 AU - Batina N AU - Renugopalakrishnan V AU - Lavin PNC AU - Guerrero JCH AU - Morales M AU - Garduno-Juarez R AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Fac Dent, Mexico City 04510, DF, MexicoHarvard Univ, Sch Med, Childrens Hosp, Boston, MA 02115, USABioFold Inc, San Jose, CA 95129, USARenugopalakrishnan, V, BioFold Inc, 650 Saratoga Ave, San Jose, CA 95129 USA TI - An atomic force microscopic study of the ultrastructure of dental enamel afflicted with amelogenesis imperfecta AB - The ultrastructure of human tooth enamel from a patient diagnosed to have amelogenesis imperfecta (AI) was investigated using atomic force microscopy (AFM) and compared with normal human tooth enamel. AI is a hereditary defect of dental enamel in which the enamel is deficient in either quality or quantity. Tissue-specific proteins, especially amelogenins, have been postulated to play a central role in amelogenesis. The secondary structure of amelogenin has been assigned an important role in directing the architecture of hydroxyapatite (HA) enamel crystallites and an alteration of the secondary structure of amelogenin is expected to result in an altered architecture of the mineral phase in human enamel. Previous studies have shown that the human amelogenin gene encodes for a mutant protein in which a conserved Pro is mutated to a Thr residue (Pro --> Thr); such a mutation should be expected to cause a disoriented pattern of the mineral phase in enamel. AFM results presented for the AI tooth enamel clearly demonstrate that the apatite crystal morphology in AI tooth enamel is perturbed in the diseased state; this might result from a defective synthesis of the extracellular matrix proteins, e.g. amelogenin, by the ameloblasts MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Biomedical;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 0920-5063 UR - ISI:000176990400008 L2 - Amelogenesis imperfecta;atomic force microscopy;tooth enamel surface;surface morphology of tooth enamel;ultrastructure;BOVINE TOOTH ENAMEL; GLASSY-CARBON; SURFACES SO - Journal of Biomaterials Science-Polymer Edition 2002 ;13(3):337-348 4847 UI - 9762 AU - Batista CVF AU - Gomez-Lagunas F AU - de la Vega RCR AU - Hajdu P AU - Panyi G AU - Gaspar R AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca, Morelos, MexicoNatl Autonomous Univ Mexico, Sch Med, Dept Physiol, Mexico City 04510, DF, MexicoDebrecen Univ Med, Dept Biophys & Cell Biol, H-4012 Debrecen, HungaryHlth Sci Ctr, H-4012 Debrecen, HungaryPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Colonia Chamilpa Avenida Univ 2001, Cuernavaca, Morelos, Mexico TI - Two novel toxins from the Amazonian scorpion Tityus cambridgei that block Kv1.3 and Shaker BK+-channels with distinctly different affinities AB - Two novel toxic peptides (Tc30 and Tc32) were isolated and characterized from the venom of the Brazilian scorpion Tityus cambridgei. The first have 37 and the second 35 amino acid residues, with molecular masses of 3871.8 and 3521.5, respectively. Both contain three disulfide bridges but share only 27% identity. They are relatively potent inhibitors of K+-currents in human T lymphocytes with K-d values of 10 nM for Tc32 and 16 nM for Tc30, but they are less potent or quite poor blockers of Shaker B K+-channels, with respective Kd values of 74 nM and 4.7 muM. Tc30 has a lysine in position 27 and a tyrosine at position 36 identical to those of charybdotoxin. These two positions conform the dyad considered essential for activity. On the contrary, Tc32 has a serine in the position equivalent to lysine 27 of charybdotoxin and does not contain any aromatic amino acid. Due to its unique primary sequence and to its distinctive preference for K+-channels of T lymphocytes, it was classified as the first example of a new subfamily of K+-channel-specific peptides (alpha-KTx18.1). Tc30 is a member of the Tityus toxin II-9 subfamily and was given the number alpha-KTx4.4. (C) 2002 Elsevier Science B.V. All rights reserved MH - Hungary MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 26 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 1570-9639 UR - ISI:000179479300001 L2 - K+-channel;Kv1.3;nomenclature;scorpion toxin;Shaker B;T lymphocyte;GATED K+ CHANNELS; POTASSIUM CHANNELS; ION-CHANNELS; CHARYBDOTOXIN; CONDUCTANCE; PEPTIDES; LYMPHOCYTES; SELECTIVITY; RESIDUES SO - Biochimica et Biophysica Acta-Proteins and Proteomics 2002 ;1601(2):123-131 4848 UI - 11537 AU - Batista CVF AU - Zamudio FZ AU - Lucas S AU - Fox JW AU - Frau A AU - Prestipino G AU - Possani LD AD - UNAM, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoCNR, Ist Cibernet & Biofis, I-16149 Genoa, ItalyHlth Sci Ctr, Dept Microbiol, Charlottesville, VA, USAInst Butantan, Sao Paulo, BrazilPossani, LD, UNAM, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Ave Univ 2001,Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Scorpion toxins from Tityus cambridgei that affect Na+-channels AB - By means of high performance liquid chromatography (HPLC) the soluble venom of the Amazonian scorpion Tityus cambridgei was fractionated into over 50 different components. Four toxic and/or lethal peptides to mice were obtained in pure form and sequenced. Mass spectrometry analysis showed molecular weights of 7310, 7151, 7259 and 7405, respectively, for toxins Tc48a. Tc49a, Tc54 and Tc49b. The N-terminal amino acid sequence was obtained for the three first toxins mentioned, whereas the full primary structure was determined for Tc49b. It contains 64 amino acid residues, closely packed by four disulfide bridges. Sequence comparison analysis showed similarities around 50% with other toxins from scorpions of the genus Tityus of Brazil. It is lethal to mice at doses of 20 mug per 20 g mouse. The toxin was shown to affect the Na+-currents permeability of rat cerebellum granular cells in culture. Almost a complete elimination of current was observed with 100 nM toxin concentration. This effect was partially reversible. Furthermore, this toxin does not modify the function of the Shaker B K+-channels expressed on Sf9 cells, nor does it modify the Na+-channel function in a similar manner as those reported for the alpha-scorpion toxins purified from other scorpions. (C) 2002 Published by Elsevier Science Ltd MH - Brazil MH - Italy MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000174512300011 L2 - amino acid sequence;cerebellum granular cell;Na+-channels;Tityus cambridgei;toxin;AMINO-ACID-SEQUENCE; SODIUM-CHANNELS; K+ CHANNELS; SERRULATUS; VENOM; NEUROTOXIN; INHIBITION; PEPTIDES; SKELETAL; RELEASE SO - Toxicon 2002 ;40(5):557-562 4849 UI - 9684 AU - Batle J AU - Casas M AU - Fortes M AU - de Llano M AU - Tolmachev VV AD - Univ Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 01000, DF, MexicoBaumann State Tech Univ, Moscow, RussiaBatle, J, Univ Illes Balears, Dept Fis, E-07071 Palma de Mallorca, Spain TI - Generalizing BCS for exotic superconductors AB - A new boson-fermion statistical model with two-hole (h) as well as two-electron (e) Cooper pairs (CP) exhibiting Bose-Einstein condensation (BEC)-which simultaneously reduces to BCS theory in weak coupling for perfect eh symmetry and to BEC when no hole CPs are present-yields reasonable transition temperatures for exotic superconductors, whether quasi-2D cuprate or 3D ones, for moderate departures from perfect eh symmetry MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0896-1107 UR - ISI:000179495900032 L2 - Boson-fermion models;BCS theory;Bose-Einstein condensation;exotic superconductors;2-COMPONENT SUPERCONDUCTIVITY; BOSE-EINSTEIN; COOPER PAIRS SO - Journal of Superconductivity 2002 ;15(6):655-657 4850 UI - 11031 AU - Batlle X AU - Hattink BJ AU - Labarta A AU - Akerman JJ AU - Escudero R AU - Schuller IK AD - Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, Catalonia, SpainUniv Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUNAM, IIM, Mexico City, DF, MexicoBatlle, X, Univ Barcelona, Dept Fis Fonamental, Diagonal 647, E-08028 Barcelona, Catalonia, Spain TI - Quantitative x-ray photoelectron spectroscopy study of Al/AlOx bilayers AB - An x-ray photoelectron spectroscopy (XPS) analysis of Nb/Al wedge bilayers, oxidized by both plasma and natural oxidation, is reported. The main goal is to show that the oxidation state-i.e., O:(oxidize)Al ratio-, structure and thickness of the surface oxide layer, as well as the thickness of the metallic Al leftover, as functions of the oxidation procedure, can be quantitatively evaluated from the XPS spectra. This is relevant to the detailed characterization of the insulating barriers in (magnetic) tunnel junctions. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000175905200112 L2 - MAGNETIC TUNNEL-JUNCTIONS; LIGHT ASSISTED OXIDATION; BALLISTIC MAGNETORESISTANCE; THERMAL-STABILITY; ROOM-TEMPERATURE; ION-BEAM; INTERFACE; BARRIERS; NANOCONTACTS; QUALITY SO - Journal of Applied Physics 2002 ;91(12):10163-10168 4851 UI - 10246 AU - Baum SF AU - Dubrovsky JG AU - Rost TL AD - Univ Calif Davis, Div Biol Sci, Plant Biol Sect, Davis, CA 95616, USACIBNOR, La Paz 23000, Baja California, MexicoRost, TL, Univ Calif Davis, Div Biol Sci, Plant Biol Sect, Davis, CA 95616 USA TI - Apical organization and maturation of the cortex and vascular cylinder in Arabidopsis thaliana (Brassicaceae) roots AB - Developmental and physiological studies of roots are frequently limited to a post-germination stage. In Arabidopsis, a developmental change in the root meristem architecture during plant ontogenesis has not previously been studied and is addressed presently. Aramdopsis thaliana have closed root apical organization. in which all cell file lineages connect directly to one of three distinct initial tiers. The root meristem organization is dynamic and changes as the root ages from 1 to 4 wk post-germination. During the ontogeny of the root, the number of cells within the root apical meristem (RAM) increases and then decreases due to changes ill the number of cortical layers and number of cell files within a central cylinder. The architecture of the initial tiers also change, as, the root meristem ages. Included in the RAM's ontogeny is a pattern associated with the periclinal divisions that give rise to the middle cortex and endodermis; the three-dimensional arrangement of periclinally dividing derivative cells resembles one gyre of a helix. Four- or 5-wk-old old roots exhibit a disorganized array of vacuolated initial cells that are a manifestation of the determinate nature of the meristem Vascular cambium is formed via coordinated divisions of vascular parenchyma and pericycle cells The phellagen is the last meristem to complete its development, and it is derived from pericycle cells that delineate the outer, boundary of the root MH - USA MH - Mexico|Baja California PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 18 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000178098900003 L2 - Arabidopsis;Brassicaceae;cortex;development;root apical meristem;vascular tissue;CELL-DIVISION; MERISTEM; GROWTH; ORIGIN SO - American Journal of Botany 2002 ;89(6):908-920 4852 UI - 9340 AU - Baumgardner D AU - Raga G AU - Peralta O AU - Rosas I AU - Castro T AU - Kuhlbusch T AU - John A AU - Petzold A AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv Duisburg Gesamthsch, FB AMT 9, D-47057 Duisburg, GermanyDeutsch Zentrum Luft & Raumfahrt, Oberpfaffenhofen, GermanyBaumgardner, D, Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Diagnosing black carbon trends in large urban areas using carbon monoxide measurements AB - [1] The relationship between black carbon (BC) and carbon monoxide (CO) has been analyzed using measurements from two sites in Mexico City and five urban areas in Germany. The correlation coefficient between BC and CO is greater than 0.90 for all sites. The average slope of the linear regression line for BC versus CO is 2.2 mug mg(-1) for German sites and 1.1 mug mg(-1) in Mexico City. The most important factors that affect the BC to CO relationship appear to be the ratio of diesel to gasoline usage and the combustion efficiency of vehicles in a particular area. The results of this analysis suggest that CO measurements in urban areas can be used to estimate BC mass when direct measurements are not available MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 17 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180485800006 L2 - black carbon;carbon monoxide;urban aerosols;ATTENUATION CROSS-SECTION; TROPICAL INDIAN-OCEAN; REAL-TIME MEASUREMENT; AEROSOL-PARTICLES; ELEMENTAL CARBON; ABSORPTION; EMISSIONS; SOOT; DUTY; SIZE SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D21): 4853 UI - 11429 AU - Bautista-Banos S AU - az-Perez JC AU - Barrera-Necha LL AD - Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoUniv Georgia, Coastal Plain Expt Stn, Dept Hort, Tifton, GA 31794, USABautista-Banos, S, Ctr Desarrollo Prod Biot, Carr Yautepec Jojutla,Km 8-5, Yautepec 62731, Morelos, Mexico TI - Postharvest fungal rots of sapote mamey Pouteria sapota (Jacq.) HE Moore & Stearn AB - Sapote mamey is an important tropical fruit of Mexico. However during the harvest season high incidence of postharvest fungi are present. Isolations of infected fruit in 1998 and 1999 indicated Pestalotia and Botryodiplodia as the main postharvest fungi. Percentage infection significantly varied according to harvest date for both 1998 and 1999. In 1988 percentage infection decreased from 65% to 20% as fruit ripening increased while in 1999 fruit infection varied from 100% to 10%. Infection caused by Botryodiplodia was more frequent. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000174830200010 L2 - Calocarpum sapota (Jacq.);Calocarpum mammosum (Jacq.);Pestalotia;Botryodiplodia;sapote-mamey SO - Postharvest Biology and Technology 2002 ;24(2):197-200 4854 UI - 11888 AU - Bayro-Corrochano E AU - Banarer V AD - Ctr Invest & Estudios Avanzados, Guadalajara 44550, Jalisco, MexicoUniv Kiel, Inst Comp Sci, D-24105 Kiel, GermanyBayro-Corrochano, E, Ctr Invest & Estudios Avanzados, Apartado Postal 31-438,Plaza Luna, Guadalajara 44550, Jalisco, Mexico TI - A geometric approach for the theory and applications of 3D projective invariants AB - A central task of computer vision is to automatically recognize objects in real-world scenes. The parameters defining image and object spaces can vary due to lighting conditions, camera calibration and viewing position. It is therefore desirable to look for geometric properties of the object which remain invariant under such changes in the observation parameters. The study of such geometric invariance is a field of active research. This paper presents the theory and computation of projective invariants formed from points and lines using the geometric algebra framework. This work shows that geometric algebra is a very elegant language for expressing projective invariants using n views. The paper compares projective invariants involving two and three cameras using simulated and real images. Illustrations of the application of such projective invariants in visual guided grasping, camera self-localization and reconstruction of shape and motion complement the experimental part MH - Germany MH - Mexico|Jalisco PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0924-9907 UR - ISI:000173586200003 L2 - computer vision;invariants;Clifford (geometric) algebra;projective geometry;3D projective invariants;visual guided robotics;ALGEBRA; IMAGES; MOTION SO - Journal of Mathematical Imaging and Vision 2002 ;16(2):131-154 4855 UI - 12280 AU - Bayro-Corrochano E AU - Rosenhahn B AD - Ctr Invest Matemat AC, Guanajuato 36000, MexicoUniv Kiel, Inst Comp Sci, D-24105 Kiel, GermanyBayro-Corrochano, E, CINVESTAV, Unidad Guadalajara, Dept Comp Sci, Apartado Postal 31-438,Apartado La Luna, Guadalajara 44550, Jalisco, Mexico TI - A geometric approach for the analysis and computation of the intrinsic camera parameters AB - The authors of this paper adopted the projected characteristics of the absolute conic in terms of the Pascal's theorem to propose an entirely new camera calibration method based on purely geometric thoughts. The use of this theorem in the geometric algebra framework allows us to compute a projective invariant using the conics of only two images which expressed using brackets helps us to set enough equations to solve the calibration problem. The method requires restricted controlled camera movements. Our method is less sensitive to noise as the Kruppa's-equation-based methods. Experiments with simulated and real images confirm that the performance of the algorithm is reliable. (C) 2001 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Guanajuato MH - Mexico|Jalisco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0031-3203 UR - ISI:000172435800015 L2 - computer vision;projective geometry;Clifford algebra;geometric algebra;calibration;Kruppa's equations;essential and fundamental matrices;SELF-CALIBRATION; MOVING CAMERA; ALGEBRA SO - Pattern Recognition 2002 ;35(1):169-186 4856 UI - 9542 AU - Bazua-Duran C AU - Au WWL AD - Univ Hawaii Manoa, Dept Oceanog, SOEST, Honolulu, HI 96822, USAUniv Hawaii, Hawaii Inst Marine Biol, Kailua, HI 96734, USABazua-Duran, C, Univ Nacl Autonoma Mexico, Lab Acust Aplicada, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Cd Univ, Mexico City 04510, DF, Mexico TI - The whistles of Hawaiian spinner dolphins AB - The characteristics of the whistles of Hawaiian spinner dolphins (Stenella longirostris) are considered by examining concurrently the whistle repertoire (whistle types) and the frequency of occurrence of each whistle type (whistle usage). Whistles were recorded off six islands in the Hawaiian Archipelago. In this study Hawaiian spinner dolphins emitted frequency modulated whistles that often sweep up in frequency (47% of the whistles were upsweeps). The frequency span of the fundamental component was mainly between 2 and 22 kHz (about 94% of the whistles) with an average mid-frequency of 12.9 kHz. The duration of spinner whistles was relatively short, mainly within a span of 0.05 to 1.28 s (about 94% of the whistles) with an average value of 0.49 s. The average maximum frequency of 15.9 kHz obtained by this study is consistent with the body length versus maximum frequency relationship obtained by Wang et al. (1995a) when using spinner dolphin adult body length measurements. When comparing the average values of whistle parameters obtained by this and other studies in the Island of Hawaii, statistically significant differences were found between studies. The reasons for these differences are not obvious. Some possibilities include differences in the upper frequency limit of the recording systems, different spinner groups being recorded, and observer differences in viewing spectrograms. Standardization in recording and analysis procedure is clearly needed. (C) 2002 Acoustical Society of America MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: ACOUSTICAL SOC AMER AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Acoustics U5 - J;Article AV - English IS - 0001-4966 UR - ISI:000179824900057 L2 - BOTTLE-NOSED DOLPHINS; TURSIOPS-TRUNCATUS; STENELLA-LONGIROSTRIS; SIGNATURE WHISTLES; REPERTOIRES; DELPHINIDAE; BEHAVIOR; PACIFIC; CALLS; SIZE SO - Journal of the Acoustical Society of America 2002 ;112(6):3064-3072 4857 UI - 10828 AU - Bec J AU - Iturriaga R AU - Khanin K AD - Observ Cote Azur, Lab GD CAssini, F-06304 Nice 4, FranceCtr Invest Matemat, Guanajuato 36000, MexicoIsaac Newton Inst Math Sci, Cambridge CB3 0EH, EnglandHeriot Watt Univ, Dept Math, Edinburgh EH14 4AS, Midlothian, ScotlandLD Landau Theoret Phys Inst, Moscow 117332, RussiaBec, J, Observ Cote Azur, Lab GD CAssini, BP 4229, F-06304 Nice 4, France TI - Topological shocks in Burgers turbulence AB - The dynamics of the multidimensional randomly forced Burgers equation is studied in the limit of vanishing viscosity. It is shown both theoretically and numerically that the shocks have a universal global structure which is determined by the topology of the configuration space. This structure is shown to be particularly rigid for the case of periodic boundary conditions MH - United Kingdom MH - France MH - Mexico|Guanajuato MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000176420900012 L2 - EQUATION SO - Physical Review Letters 2002 ;89(2): 4858 UI - 10121 AU - Behle RW AU - Dowd PF AU - Tamez-Guerra P AU - Lagrimin LM AD - USDA ARS, Natl Ctr Agr Utilizat Res, Crop Bioprotect Res Unit, Peoria, IL 61604, USAUANL, Fac Ciencias Biol, Dept Microbiol & Immunol, San Nicolas Los Garza 66451, NL, MexicoDowd, PF, USDA ARS, Natl Ctr Agr Utilizat Res, Crop Bioprotect Res Unit, 1815 N Univ St, Peoria, IL 61604 USA TI - Effect of transgenic plants expressing high levels of a tobacco anionic peroxidase on the toxicity of Anagrapha falcifera nucleopolyhedrovirus to Helicoverpa zea (Lepidoptera : Noctuidae) AB - Wild type and corresponding transgenic tomato (Lycopersicon esculentum Miller) and two tobacco (Nicotiana spp.) plants that express high levels of a tobacco anionic peroxidase were used to determine what type of interactions occurred between peroxidase altered plant chemistry and the baculovirus Anagrapha falcifera nucleopolyhedrovirus (AfMNPV) for control of neonate corn earworms, Helicoverpa zea (Boddie). Transgenic plants expressed approximately five to 400 times higher peroxidase activity than corresponding tissues of wild type plants. The H. zea larvae typically fed 1.5 times less on transgenic compared with wild type leaf disks. There was only one experiment (of three with tomato leaves) where the larvae that fed on transgenic leaves were less susceptible to the virus based on nonoverlapping 95% confidence intervals for LC50 values. When the exposure dose was corrected for reduced feeding on the transgenic leaf disks, the insecticidal activity of the virus was not significantly different for larvae fed on transgenic versus wild type plants. Eight other experiments (with tomato and two species of tobacco) indicated either no significant effect or enhanced susceptibility (when corrected for feeding rates) to the virus of larvae fed on the transgenic leaves. These results indicate enhanced insect resistance in plants expressing high levels of a specific anionic peroxidase may be compatible with applications of AfMNPV. Potential reasons for this compatibility are discussed MH - USA MH - Mexico|Nuevo Leon PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000178371100011 L2 - Helicoverpa zea;Anagrapha falcifera nucleopolyhedrovirus;peroxidase;transgenic plants;NUCLEAR POLYHEDROSIS-VIRUS; HOST-PLANT; DISEASE RESISTANCE; LEAF RESISTANCE; TOMATO PLANTS; BACULOVIRUS; SUSCEPTIBILITY; INFECTION; EFFICACY; INSECTS SO - Journal of Economic Entomology 2002 ;95(1):81-88 4859 UI - 10664 AU - Belfield KD AU - Morales ARM AU - Mangual EJ AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, Sch Opt, CREOL, Orlando, FL 32816, USAUniv Autonoma Puebla, Dept Chem, Puebla 72570, MexicoBenemerita Univ, Ctr Quim, Puebla, Mexico TI - Synthesis and characterization of organic chromophores possessing nonlinear optical properties MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296801220 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():B220-B220 4860 UI - 10665 AU - Belfield KD AU - Morales ARM AU - Bondar MV AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, Sch Opt, CREOL, Orlando, FL 32816, USAUniv Autonoma Puebla, Dept Chem, Puebla, MexicoUkrainian Acad Sci, Inst Phys, Dept Photoact, Kiev, UkraineBenemerita Univ Puebla, Ctr Quim, Puebla, Mexico TI - New materials for linear and nonlinear luminescent applications: Photophysical characterization MH - Mexico|Puebla MH - Ukraine MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296801362 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():B243-B243 4861 UI - 10667 AU - Belfield KD AU - Morales ARM AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, Sch Opt, CREOL, Orlando, FL 32816, USAUniv Puebla, Dept Chem, Puebla, Mexico TI - Synthesis and characterization of a two-photon absorbing and luminescent aminofluorenyl polymer MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296802726 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():D36-D36 4862 UI - 10036 AU - Belyaeva TL AU - Zelenskaya NS AU - Granados MA AD - Moscow MV Lomonosov State Univ, Nucl Phys Res Inst, Moscow 117234, RussiaBelyaeva, TL, Mexican Independent Univ, Mexico City, DF, Mexico TI - Investigation of quasimolecular states in Mg-24* through the analysis of the angular d alpha correlations in the C-12(N-14, d)Mg-24(alpha)Ne-20 reaction AB - Theoretical analysis of the differential cross sections and angular correlation functions In the C-12(N-14, d)Mg-24*(alpha)Ne-20 reaction at the energy of the incident nitrogen ions E-lab = 29-42 MeV is performed in the models of the direct transfer of C-12 cluster and the compound nucleus. Amplitudes of the reduced widths for the excited quasimolecular states like C-12 circle times(12) C* in the Mg-24 nucleus are obtained. The effect of various states of the relative motion of nuclei in the C-12 + C-12* configuration on the angular dalpha-correlation functions is studied. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7788 UR - ISI:000178566400007 L2 - CLUSTER STATES; PARTICLES SO - Physics of Atomic Nuclei 2002 ;65(9):1616-1627 4863 UI - 10096 AU - Belyaeva TL AU - Zelenskaya NS AD - Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, RU-119899 Moscow, RussiaUniv Autonoma Estado Mexico, Toluca 50000, MexicoBelyaeva, TL, Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, RU-119899 Moscow, Russia TI - Quasimolecular states in Mg-24 and d-alpha angular correlations in the C-12(N-14,d)Mg-24(*)(alpha)Ne-20 reaction AB - Theoretical approach for studies on particle-particle angular correlations in nuclear reactions induced by light and semiheavy ions with an incident energy up to 10 MeV/nucleon is developed. The generalized methods for calculations of the angular correlation functions and the spin tensors of the density matrix for the reaction products based on the distorted-wave model with finite interaction range and the compound nucleus model are presented for reactions involving high-lying excited states. The differential cross sections and d-alpha correlation functions in the C-12(N-14,d)Mg-24*(alpha)Ne-20 reaction induced by N-14 ions at E-lab=29-45 MeV are analyzed both in the framework of the model of direct C-12 transfer and the statistical compound nucleus model. The reduced width amplitudes for the higher-excited states in Mg-24 with (12)Ccircle times(12)C quasimolecular structure are extracted. The importance of relative motion of C-12+C-12* nuclei is demonstrated MH - Mexico|Estado De Mexico MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000178383900025 L2 - INELASTIC-SCATTERING; REACTION C-12(N-14; RESONANCES; CLUSTER; PARTICLES SO - Physical Review C 2002 ;66(3): 4864 UI - 9233 AU - Ben Liley J AU - Baumgardner D AU - Kondo Y AU - Kita K AU - Blake DR AU - Koike M AU - Machida T AU - Takegawa N AU - Kawakami S AU - Shirai T AU - Ogawa T AD - NIWA Lauder, Omakau, Cent Otago, New ZealandUNAM, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, JapanUniv Calif Irvine, Dept Chem, Irvine, CA 92697, USAUniv Tokyo, Dept Earth & Planetary Sci, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, JapanNatl Inst Environm Studies, Tsukuba, Ibaraki 3058506, JapanNagoya Univ, Solar Terr Environm Lab, Toyokawa, JapanNASDA, Earth Observ Res Ctr, Chuou Ku, Tokyo 1060032, JapanBen Liley, J, NIWA Lauder, Private Bag 50061, Omakau, Cent Otago, New Zealand TI - Black carbon in aerosol during BIBLE B AB - [1] The Biomass Burning and Lightning Experiment (BIBLE) A and B campaigns over the tropical western Pacific during springtime deployed a Gulfstream-II aircraft with systems to measure ozone and numerous precursor species. Aerosol measuring systems included a MASP optical particle counter, a condensation nucleus (CN) counter, and an absorption spectrometer for black carbon. Aerosol volume was very low in the middle and upper troposphere during both campaigns, and during BIBLE A, there was little aerosol enhancement in the boundary layer away from urban areas. In BIBLE B, there was marked aerosol enhancement in the lowest 3 km of the atmosphere. Mixing ratios of CN in cloud-free conditions in the upper troposphere were in general higher than in the boundary layer, indicating new particle formation from gaseous precursors. High concentrations of black carbon were observed during BIBLE B, with mass loadings up to 40 mug m(-3) representing as much as one quarter of total aerosol mass. Strong correlations with hydrocarbon enhancement allow the determination of a black carbon emission ratio for the fires at that time. Expressed as elemental carbon, it is about 0.5% of carbon dioxide and 6% of carbon monoxide emissions from the same fires, comparable to methane production, and greater than that of other hydrocarbons MH - Japan MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 0 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180869800005 L2 - black carbon;biomass burning;NHMC;TROPOSPHERE; SOOT; NUCLEI SO - Journal of Geophysical Research-Atmospheres 2002 ;108(D3): 4865 UI - 9710 AU - Benammi M AU - Urrutia-Fucugauchi J AU - va-Valdivia LM AU - Chaimanee Y AU - Triamwichanon S AU - Jaeger JJ AD - Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, MexicoUniv Montpellier 2, Lab Geophys & Tecton, F-34095 Montpellier 5, FranceDept Mineral Resources, Geol Survey Div, Bangkok 10400, ThailandUniv Montpellier 2, ISEM, Lab Paleontol, F-34095 Montpellier 5, FranceBenammi, M, Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, Mexico TI - Magnetostratigraphy of the Middle Miocene continental sedimentary sequences of the Mae Moh Basin in northern Thailand: evidence for counterclockwise block rotation AB - A magnetostratigraphic study has been performed on the Mae Moh basin, well known for its lignite mining in the Lampang province. Paleomagnetic samples were collected from 66 stratigraphic levels. Rock magnetic investigations indicate the presence of low coercivity minerals. Specimens subjected to progressive thermal (or alternating field) demagnetization procedures show that nearly all of them exhibit a low temperature magnetization component, and a high temperature characteristic component (ChRM), with either positive or negative virtual geomagnetic pole latitudes and opposite polarity, considered as the characteristic Miocene magnetization. The overall mean paleomagnetic direction (incl. = 22.2degrees, decl. = 358.3degrees, kappa= 15, alpha(95) = 4) documents a counterclockwise vertical axis rotation of about 13degrees +/- 1.32 with respect to the expected Miocene direction derived from the Eurasian polar wander curve (incl. = 42degrees, decl. = 11degrees). Our paleomagnetic results are not consistent with the previously reported paleomagnetic data. The rotation observed in the Mae Moh basin can be the response to local tectonics. A section sampled for magnetostratigraphy reveals a polarity sequence of nine magnetozones that can reliably be correlated to the geomagnetic polarity time scale. According to biochronological constraints, the magnetostratigraphic results from the mammal-bearing succession correlate with chron C5ABn-C5An2n, between 13.5 and 12.1 Ma. According to the mean sedimentation rate of about 17.5 cm/ka, ages of 12.5 and 12.8 Ma are proposed for the fossiliferous levels (J5 and Kl, K2 lignite zones) were the mammal remains were found. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Thailand PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0012-821X UR - ISI:000179600000005 L2 - Thailand;magnetostratigraphy;biostratigraphy;Miocene;rotation;PALEOMAGNETIC DATA; REVERSAL SO - Earth and Planetary Science Letters 2002 ;204(3-4):373-383 4866 UI - 9985 AU - Bennett JV AU - de Castro JF AU - Valdespino-Gomez JL AU - Garcia-Garcia MD AU - Islas-Romero R AU - Echaniz-Aviles G AU - Jimenez-Corona A AU - Sepulveda-Amor J AD - Emory Univ, Rollins Sch Publ Hlth, Dept Epidemiol, Atlanta, GA 30322, USANatl Inst Publ Hlth, Dept Epidemiol Diag, Cuernavaca, Morelos, MexicoBennett, JV, Emory Univ, Rollins Sch Publ Hlth, Dept Epidemiol, Atlanta, GA 30322 USA TI - Aerosolized measles and measles-rubella vaccines induce better measles antibody booster responses than injected vaccines: randomized trials in Mexican schoolchildren AB - Objective To compare antibody responses and side-effects of aerosolized and injected measles vaccines after revaccination of. children enrolling in elementary schools. Methods Vaccines for measles (Edmonston-Zagrel) or, measles-rubella (Edmonston-Zagreb with RA27/3) were given by aerosol or injection to four groups of children. An additional group received Schwarz measles vaccine by injection. These five groups received vaccines in usual standard titre doses. A sixth group received only 1000 plaque-forming units of Ednonston-Zagreb vaccine by aerosol. The groups were randomized by school. Concentrations of neutralizing antibodies were determined in blood specimens taken at baseline and four months after vaccination from randomized subgroups (n = 28-31) of children in each group. Findings After baseline antibody titres were controlled for, the frequencies of fourfold or greater increases in neutralizing antibodies did not differ significantly between the three groups that received vaccine by aerosol (range 52%-64%), but they were significantly higher than those for the three groups that received injected vaccine (range 4%-23%). Mean increases in titres and post-vaccination. geometric mean titres paralleled these findings. Fewer side-effects were noted after aerosol than injection administration of vaccine. Conclusion Immunogenicity of measles vaccine, when administered by aerosol is superior to that when the vaccine is given by injection. This advantage persists with aerosolized doses less than or equal to one-fifth of usual injected doses. The efficacy and cost-effectiveness of measles vaccination by aerosol should be, further evaluated in mass campaigns MH - USA MH - Mexico|Morelos PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 27 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000178776800008 L2 - measles vaccine/administration and dosage;rubella vaccine/administration and dosage;immunization, secondary;administration, inhalation;administration, cutaneous;aerosols;Nebulizers and vaporizers;injections;enzyme-linked immunosorbent assay;comparative study;randomized controlled trials;Mexico;SUBCUTANEOUS ROUTES; IMMUNIZATION; VIRUS SO - Bulletin of the World Health Organization 2002 ;80(10):806-812 4867 UI - 10292 AU - Bennett KE AU - Olson KE AU - Munoz MD AU - Fernandez-Salas I AU - Farfan-Ale JA AU - Higgs S AU - Black WC AU - Beaty BJ AD - Colorado State Univ, Dept Microbiol, Arthropod Borne Infect Dis Labs, Ft Collins, CO 80523, USAInst Politecn Nacl, Dept Genet & Mol Biol, Mexico City, DF, MexicoUniv Autonoma Nuevo Leon, Lab Entomol Med, Fac Ciencias Biol, Monterrey, MexicoUniv Autonoma Yucatan, Ctr Invest Reg, Merida, MexicoUniv Texas, Med Branch, Dept Pathol, Galveston, TX 77550, USABennett, KE, Colorado State Univ, Dept Microbiol, Arthropod Borne Infect Dis Labs, Ft Collins, CO 80523 USA TI - Variation in vector competence for dengue 2 virus among 24 collections of Aedes aegypti from Mexico and the United States AB - Aedes aegypti from 24 collections in Mexico and the United States were challenged orally with dengue 2 virus JAM1409 (DEN-2 JAM1409). The vector competence (VC) of the populations ranged from 24% to 83%. Mosquito populations from the Yucatan exhibited greater VC than those from other areas of Mexico. The presence or absence of a midgut infection barrier (MIB) and a midgut escape barrier (MEB) was determined for mosquitoes in each population. The percentage of mosquitoes exhibiting an MIB ranged from 14% to 59%, and those exhibiting an MEB ranged from 4% to 43% in the collections. The MIB and MEB were not completely independent as determined by regression analysis. Midgut infection rates were dose dependent MH - USA MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Mexico|Nuevo Leon PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 25 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000178069600014 L2 - YELLOW-FEVER VIRUS; MARKER-ASSISTED SELECTION; ORAL INFECTION; SUSCEPTIBILITY; STRAINS; TYPE-2; GENETICS SO - American Journal of Tropical Medicine and Hygiene 2002 ;67(1):85-92 4868 UI - 10560 AU - Bentardeau F AU - Colombi S AU - Gaztanaga E AU - Scoccimarro R AD - New York Univ, Dept Phys, New York, NY 10003, USACEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, FranceCNRS, Inst Astrophys Paris, F-75014 Paris, FranceINAOE, Puebla 78840, MexicoCSIC, ICE, Inst Estudis Espacials Catalunya, Barcelona 08034, SpainPrinceton Univ Sch Nat Sci, Inst Adv Study, Princeton, NJ 08540, USAScoccimarro, R, New York Univ, Dept Phys, 4 Washington Pl, New York, NY 10003 USA TI - Large-scale structure of the Universe and cosmological perturbation theory AB - We review the formalism and applications of non-linear perturbation theory (PT) to understanding the large-scale structure of the Universe. We first discuss the dynamics of gravitational instability, from the linear to the non-linear regime. This includes Eulerian and Lagrangian PT, non-linear approximations, and a brief description of numerical simulation techniques. We then cover the basic statistical tools used in cosmology to describe cosmic fields, such as correlation functions in real and Fourier space, probability distribution functions, cumulants and generating functions. In subsequent sections we review the use of PT to make quantitative predictions about these statistics according to initial conditions, including effects of possible non-Gaussianity of the primordial fields. Results are illustrated by detailed comparisons of PT predictions with numerical simulations. The last sections deal with applications to observations. First, we review in detail practical estimators of statistics in galaxy catalogs and related errors, including traditional approaches and more recent developments. Then, we consider the effects of the bias between the galaxy distribution and the matter distribution, the treatment of redshift distortions in three-dimensional surveys and of projection effects in angular catalogs, and some applications to weak gravitational lensing. We finally review the current observational situation regarding statistics in galaxy catalogs and what the future generation of galaxy surveys promises to deliver. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - France MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Review AV - English IS - 0370-1573 UR - ISI:000177153500001 L2 - COLD DARK-MATTER; GALAXY REDSHIFT SURVEY; N-BODY SIMULATIONS; 3-POINT CORRELATION-FUNCTION; ANGULAR-CORRELATION FUNCTION; GAUSSIAN INITIAL CONDITIONS; QUASI-LINEAR REGIME; DENSITY DISTRIBUTION FUNCTION; POWER-SPECTRUM ANALYSIS; PRIMORDIAL NON-GAUSSIANITY SO - Physics Reports-Review Section of Physics Letters 2002 ;367(1-3):1-248 4869 UI - 9629 AU - Beral V AU - Hamajima N AU - Hirose K AU - Rohan T AU - Calle EE AU - Heath CW AU - Coates RJ AU - Liff JM AU - Talamini R AU - Chantarakul N AU - Koetsawang S AU - Rachawat D AU - Morabia A AU - Schuman L AU - Stewart W AU - Szklo M AU - Bain C AU - Schofield F AU - Siskind V AU - Band P AU - Coldman AJ AU - Gallagher RP AU - Hislop TG AU - Yang P AU - Kolonel LM AU - Nomura AMY AU - Hu J AU - Johnson KC AU - Mao Y AU - De Sanjose S AU - Lee N AU - Marchbanks P AU - Ory HW AU - Peterson HB AU - Wilson HG AU - Wingo PA AU - Ebeling K AU - Kunde D AU - Nishan P AU - Hopper JL AU - Colditz G AU - Gajalakshmi V AU - Martin N AU - Pardthaisong T AU - Solpisornkosol S AU - Theetranont C AU - Boosiri B AU - Chutivongse S AU - Jimakorn P AU - Virutamasen P AU - Wongsrichanalai C AU - Ewertz M AU - Adami HO AU - Bergkvist L AU - Magnusson C AU - Persson I AU - Chang-Claude J AU - Paul C AU - Skegg DCG AU - Spears GFS AU - Boyle P AU - Evstifeeva T AU - Daling JR AU - Hutchinson WB AU - Malone K AU - Noonan EA AU - Stanford JL AU - Thomas DB AU - Weiss NS AU - White E AU - Andrieu N AU - Bremond A AU - Clavel F AU - Gairard B AU - Lansac J AU - Piana L AU - Renaud R AU - Izquierdo A AU - Viladiu P AU - Cuevas HR AU - Ontiveros P AU - Palet A AU - Salazar SB AU - Arsitizabal N AU - Cuadros A AU - Tryggvadottir L AU - Tulinius H AU - Bachelot A AU - Le MG AU - Peto J AU - Franceschi S AU - Lubin F AU - Modan B AU - Ron E AU - Wax Y AU - Friedman GD AU - Hiatt RA AU - Levi F AU - Bishop T AU - Kosmelj K AU - Primic-Zakelj M AU - Ravnihar B AU - Stare J AU - Beeson WL AU - Fraser G AU - Bulbrook RD AU - Cuzick J AU - Duffy SW AU - Fentiman IS AU - Hayward JL AU - Wang DY AU - McMichael AJ AU - McPherson K AU - Hanson RL AU - Leske MC AU - Mahoney MC AU - Nasca PC AU - Varma AO AU - Weinstein AL AU - Moller TR AU - Olsson H AU - Ranstam J AU - Goldbohm RA AU - van den Brandt PA AU - Apelo RA AU - Baens J AU - de la Cruz JR AU - Javier B AU - Lacaya LB AU - Ngelangel CA AU - La Vecchia C AU - Negri E AU - Marubini E AU - Ferraroni M AU - Gerber M AU - Richardson S AU - Segala C AU - Gatei D AU - Kenya P AU - Kungu A AU - Mati JG AU - Brinton LA AU - Hoover R AU - Schairer C AU - Spirtas R AU - Lee HP AU - Rookus MA AU - van Leeuwen FE AU - Schoenberg JA AU - McCredie M AU - Gammon MD AU - Clarke EA AU - Jones L AU - Neil A AU - Vessey M AU - Yeates D AU - Appleby P AU - Banks E AU - Bull D AU - Crossley B AU - Goodill A AU - Green J AU - Hermon C AU - Key T AU - Langston N AU - Lewis C AU - Reeves G AU - Collins R AU - Doll R AU - Peto R AU - Mabuchi K AU - Preston D AU - Hannaford P AU - Kay C AU - Rosero-Bixby L AU - Gao YT AU - Jin F AU - Yuan JM AU - Wei HY AU - Yun T AU - Zhiheng C AU - Berry G AU - Cooper Booth J AU - Jelihovsky T AU - MacLennan R AU - Shearman R AU - Wang QS AU - Baines CJ AU - Miller AB AU - Wall C AU - Lund E AU - Stalsberg H AU - Shu XO AU - Zheng W AU - Katsouyanni K AU - Trichopoulou A AU - Trichopoulos D AU - Dabancens A AU - Martinez L AU - Molina R AU - Salas O AU - Alexander XE AU - Anderson K AU - Folsom AR AU - Hulka BS AU - Bernstein L AU - Enger S AU - Haile RW AU - Paganini-Hill A AU - Pike MC AU - Ross RK AU - Ursin G AU - Yu MC AU - Longnecker MP AU - Newcomb P AU - Bergkvist L AU - Kalache A AU - Farley TMM AU - Holck S AU - Meirik O AD - Radcliffe Infirm, Canc Res UK Epidemiol Unit, Oxford OX2 6HE, EnglandAichi Res Inst, Nagoya, JapanEmory Univ, Atlanta, GA, USAAviano Cancer Ctr, Pordenone, ItalyMahidol Univ, Bangkok, ThailandJohns Hopkins Univ, Breast Tumor Collaborat Stud, Baltimore, MD, USAUniv Queensland, Brisbane, AustraliaCentral Inst Cancer Res, Berlin, GermanyCatalan Inst Oncol, Barcelona, SpainUniv Melbourne, Ctr Genet Epidemiol, Melbourne, AustraliaChennai Cancer Inst, Madras, IndiaChiang Mai Univ, Chiang Mai, ThailandChulalongkorn Univ, Bangkok, ThailandDanish Cancer Soc, Aalborg, DenmarkKarolinska Inst, Dept Med Epidemiol, Stockholm, SwedenDeutches Krebsforschungszentr, Heidelberg, GermanyUniv Otago, Dunedin, New ZealandEur Inst Oncol, Milan, ItalyINSERM, French Multictr Breast Stud, Villejuif, FranceGirona Cancer Registry, Girona, SpainHosp Gen Mexico City, Mexico City, MexicoHosp Univ, Cali, ColombiaIcelandic Cancer Soc, Reykjavik, IcelandINSERM, Inst Gustav Roussey, Villejuif, FranceInternatl Agcy Res Cancer, Lyon, FranceIsrael Chaim Sheba Med Ctr, Tel Hashomer, IsraelInst Univ Med Soc Prevent, Lausanne, SwitzerlandCancer Res UK Genet Epidemiol Lab, Leeds, EnglandInst Oncol, Ljubljana, SloveniaCancer Res UK Dept Math Statist Epidemiol, London, EnglandLondon Sch Hygeine Trop Med, London, EnglandUniv Hosp, Lund, SwedenMaastricht Univ, Maastricht, NetherlandsUniv Philippines, Manila, PhilippinesIst Mario Negri, Milan, ItalyIst Nazionale Tumor, Div Statist Med Biometria, Milan, ItalyIst Statist Med Biometria, Milan, ItalyMontpellier Cancer Ctr, Montpellier, FranceINSERM, Montpellier, FranceNairobi Ctr Res Reproduct, Nairobi, KenyaNatl Univ Singapore, Singapore, SingaporeNetherlands Cancer Inst, Amsterdam, NetherlandsNSW Cancer Council, Sydney, NSW, AustraliaDpt Publ Health & Primary Care, Oxford, EnglandCancer Res UK Epidemiol Unit, Oxford, EnglandRadiat Effects Res Fdn, Hiroshima, JapanRoyal Coll Gen Practitioners, Oral Contracept Study, London, EnglandUniv Costa Rica, San Jose, Costa RicaShanghai Cancer Inst, Shanghai, Peoples R ChinaShanghai Inst Planned Parenthood Res, Shanghai, Peoples R ChinaDept Publ Health, Sydney, AustraliaTianjin Cancer Inst, Tianjin, Peoples R ChinaDept Publ Health Sci, Toronto, ON, CanadaTromso Univ, Tromso, NorwayUniv Athens, Sch Med, Athens, GreeceUniv Chile, Santiago, ChileUniv Edinburgh, Edinburgh, Midlothian, ScotlandUniv N Carolina, Sch Publ Hlth, Chapel Hill, NC, USAUniv Nottingham, Nottingham, EnglandUniv So Calif, Los Angeles, CA, USAWHO, Geneva, SwitzerlandAlbert Einstein Coll Med, New York, NY, USAAmer Canc Soc, Atlanta, GA 30329, USAUniv Hawaii Manoa, Canc Res Ctr, Honolulu, HI 96822, USABrigham & Womens Hosp, Channing Lab, Harvard Med Sch, Boston, MA, USALoma Linda Univ, Loma Linda, CA 92350, USANCI, Bethesda, MD 20892, USANew Jersey State Dept Hlth, Trenton, NJ 08625, USAColumbia Univ, Sch Publ Hlth, New York, NY, USAVanderbilt Univ, Nashville, TN, USAUniv Minnesota, Sch Publ Hlth, Minneapolis, MN 55455, USAUniv Wisconsin, Comprehens Canc Ctr, Madison, WI 53706, USACtr Dis Control & Prevent, Atlanta, GA, USACanc Res UK MRC BHF, Epidemiol Studies Unit, Oxford, EnglandCanc Res UK MRC BHF, Clin Trial Serv Unit, Oxford, EnglandBeral, V, Radcliffe Infirm, Canc Res UK Epidemiol Unit, Gibson Bldg,Woodstock Rd, Oxford OX2 6HE, England TI - Alcohol, tobacco and breast cancer - collaborative reanalysis of individual data from 53 epidemiological studies, including 58515 women with breast cancer and 95067 women without the disease AB - Alcohol and tobacco consumption are closely correlated and published results on their association with breast cancer have not always allowed adequately for confounding between these exposures. Over 80% of the relevant information worldwide on alcohol and tobacco consumption and breast cancer were collated, checked and analysed centrally. Analyses included 58515 women with invasive breast cancer and 95067 controls from 53 studies. Relative risks of breast cancer were estimated, after stratifying by study, age, parity and, where appropriate, women's age when their first child was born and consumption of alcohol and tobacco. The average consumption of alcohol reported by controls from developed countries was 6.0 g per day, i.e. about half a unit/drink of alcohol per day, and was greater in ever-smokers than never-smokers, (8.4 g per day and 5.0 g per day, respectively). Compared with women who reported drinking no alcohol, the relative risk of breast cancer was 1.32 (1.19 - 1.45, P < 0.00001) for an intake of 35 - 44 g per day alcohol, and 1.46 (1.33 - 1.61, P < 0.00001) for greater than or equal to 45 g per day alcohol. The relative risk of breast cancer increased by 7.1% (95% CI 5.5-8.7%; P<0.00001) for each additional 10 g per day intake of alcohol, i.e. for each extra unit or drink of alcohol consumed on a daily basis. This increase was the same in ever-smokers and never-smokers (7.1 % per 10 g per day, P < 0.00001, in each group). By contrast, the relationship between smoking and breast cancer was substantially confounded by the effect of alcohol. When analyses were restricted to 22 255 women with breast cancer and 40 832 controls who reported drinking no alcohol, smoking was not associated with breast cancer (compared to never-smokers, relative risk for ever-smokers= 1.03, 95% CI 0.98 - 1.07, and for current smokers=0.99, 0.92 - 1.05). The results for alcohol and for tobacco did not vary substantially across studies, study designs, or according to 15 personal characteristics of the women; nor were the findings materially confounded by any of these factors. If the observed relationship for alcohol is causal, these results suggest that about 4% of the breast cancers in developed countries are attributable to alcohol. In developing countries, where alcohol consumption among controls averaged only 0.4 g per day, alcohol would have a negligible effect on the incidence of breast cancer. In conclusion, smoking has little or no independent effect on the risk of developing breast cancer; the effect of alcohol on breast cancer needs to be interpreted in the context of its beneficial effects, in moderation, on cardiovascular disease and its harmful effects on cirrhosis and cancers of the mouth, larynx, oesophagus and liver. (C) 2002 Cancer Research UK MH - Australia MH - Canada MH - Chile MH - Colombia MH - Costa Rica MH - Denmark MH - United Kingdom MH - France MH - Germany MH - Greece MH - Iceland MH - India MH - Israel MH - Italy MH - Japan MH - Kenya MH - Mexico|Distrito Federal MH - Netherlands MH - New Zealand MH - Norway MH - Peoples R China MH - Philippines MH - Singapore MH - Slovenia MH - Spain MH - Sweden MH - Switzerland MH - Thailand MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 175 U4 - Oncology U5 - J;Article AV - English IS - 0007-0920 UR - ISI:000179819900009 L2 - breast cancer;alcohol;tobacco;smoking;collaborative analysis;ORAL-CONTRACEPTIVE USE; ITALIAN CASE-CONTROL; POSTMENOPAUSAL WOMEN; CIGARETTE-SMOKING; RISK-FACTORS; YOUNG-WOMEN; BEVERAGE CONSUMPTION; MENOPAUSAL STATUS; SOUTHERN FRANCE; HORMONE USE SO - British Journal of Cancer 2002 ;87(11):1234-1245 4870 UI - 10670 AU - Bercot P AU - Pena-Munoz E AU - Pagetti J AD - Lab Chim Mat & Interfaces, F-25000 Besancon, FranceUniv Monterry, Garza Garica, NL, MexicoBercot, P, Lab Chim Mat & Interfaces, Pole Corros Traitements Surface & Syst Electrochi, F-25000 Besancon, France TI - Electrolytic composite Ni-PTFE coatings: an adaptation of Guglielmi's model for the phenomena of incorporation AB - Co-deposition of inert particles in a metallic matrix enables the production of a large range of composite materials with unique properties. Previous work on examination of the effects of the variation of experimental conditions has produced some understanding of the mechanism. When stirring is carried out using a rotating disk electrode, the hydrodynamic conditions are well defined and can be taken into account. In this paper the model proposed by Guglielmi, which does not take into account agitation of the bath, has been used and modified to explain results for Ni-PTFE deposition incorporating a correction based on the speed of magnetic rotation. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Nuevo Leon PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 18 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000176940200025 L2 - plating;nickel;polytetrafluoroethene (PTFE);composite;WATTS BATH; ELECTROCHEMICAL CODEPOSITION; WEAR CHARACTERISTICS; SILICON-CARBIDE; INERT PARTICLES; NICKEL; ELECTRODEPOSITION; DEPOSITION; COPPER; MATRIX SO - Surface & Coatings Technology 2002 ;157(2-3):282-289 4871 UI - 8532 AU - Berenguer M AU - Palau A AU - Moreno R AU - Prieto M AU - Carrasco D AU - Benlloch S AU - Berenguer J AD - Hosp La Fe, E-46009 Valencia, SpainHosp CMN Siglo XXI, Mexico City, DF, Mexico TI - Severe recurrent hepatitis C following liver re-transplantation (LT) for HCV-related graft cirrhosis MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000178301700052 SO - Hepatology 2002 ;36(4):179A-179A 4872 UI - 11141 AU - Berhault G AU - Araiza LC AU - Moller AD AU - Mehta A AU - Chianelli RR AD - Univ Poitiers, Catalyse Chim Organ Lab, CNRS, UMR6503, F-86022 Poitiers, FranceCCMC, Ensenada 22830, Baja California, MexicoStanford Univ, Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309, USAUniv Texas, Mat Res & Technol Inst, El Paso, TX 79968, USABerhault, G, Univ Poitiers, Catalyse Chim Organ Lab, CNRS, UMR6503, 40 Ave Recteur Pineau, F-86022 Poitiers, France TI - Modifications of unpromoted and cobalt-promoted MoS2 during thermal treatment by dimethylsulfide AB - Previous results have shown that the active surface in stabilized active sulfide catalysts is carbided. This fact led us to reconsider the influence of organosulfide agents in the activation of hydrotreatment catalysts. Structural and morphological consequences of dimethylsulfide treatment Of (CO)/MoS2-based solids were studied. Results suggest that the electronic promotion of Mo by Co substantially influences the carbon replacement of sulfur atoms at the edges of molybdenum sulfide layers MH - France MH - Mexico|Baja California MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000175691600012 L2 - MoS2;MoSxCy;CoMoS;CoMoC;hydrodesulfurization;dimethylsulfide;TRANSITION-METAL SULFIDES; IN-SITU DECOMPOSITION; MOLYBDENUM CARBIDE; HYDRODESULFURIZATION CATALYSTS; WS2 CATALYSTS; SPECTROSCOPY; ADSORPTION; SURFACE; CARBON; HYDROGENATION SO - Catalysis Letters 2002 ;78(1-4):81-90 4873 UI - 11538 AU - Berkove E AU - Juan-Pineda D AU - Pearson K AD - Lafayette Coll, Dept Math, Easton, PA 18042, USAInst Matemat, Morelia 58089, Michoacan, MexicoUniv Valparaiso, Dept Math & Comp Sci, Valparaiso, IN 46383, USABerkove, E, Lafayette Coll, Dept Math, Easton, PA 18042, USA TI - A geometric approach to the lower algebraic Kappa-theory of Fuchsian groups AB - We use a geometric approach to the lower algebraic K-theory of a finitely generated Fuchsian group F and give explicit descriptions of K-1(ZGamma), K-0(ZGamma), and K-1(ZGamma). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000174512600003 L2 - Kappa-theory;Fuchsian groups;Kleinian groups;Whitehead groups;K-THEORY; MAPS SO - Topology and Its Applications 2002 ;119(3):269-277 4874 UI - 9670 AU - Berman GP AU - Borgonovi F AU - Celardo G AU - Izrailev FM AU - Kamenev DI AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyIst Nazl Fis Nucl, Sez Pavia, Pavia, ItalyIst Nazl Fis Nucl, Unita Brescia, Brescia, ItalyINFM, Unita Milano, Milan, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoBerman, GP, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Dynamical fidelity of a solid-state quantum computation AB - In this paper we analyze the dynamics in a spin model of quantum computer. Main attention is paid to the dynamical fidelity (associated with dynamical errors) of an algorithm that allows to create an entangled state for remote qubits. We show that in the regime of selective resonant excitations of qubits there is no danger of quantum chaos. Moreover, in this regime a modified perturbation theory gives an adequate description of the dynamics of the system. Our approach allows us to explicitly describe all peculiarities of the evolution of the system under time-dependent pulses corresponding to a quantum protocol. Specifically, we analyze, both analytically and numerically, how the fidelity decreases in dependence on the model parameters MH - Italy MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179630800133 L2 - CHAOS; SYSTEMS; COMPUTER; DECOHERENCE; BORDER; MODEL SO - Physical Review e 2002 ;66(5): 4875 UI - 9674 AU - Berman GP AU - Lopez GV AU - Tsifrinovich VI AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoPolytech Inst New York, IDS Dept, Brooklyn, NY 11201, USABerman, GP, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Teleportation in a nuclear spin quantum computer AB - We present a procedure for quantum teleportation in a nuclear spin quantum computer in which quantum logic gates are implemented by using selective electromagnetic pulses. A sequence of pulses is combined with single-spin measurements in the sigma(z) basis for fast transfer of information in a spin quantum computer. We simulated this procedure,for quantum teleportation in a nuclear spin chain with a large number (201) of spins. The systematic errors generated in the process of teleportation due to the non-resonant effects are analyzed in detail. We demonstrate that a "2 pik" method provides a significant reduction of errors MH - Mexico|Jalisco MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000179502200041 SO - Physical Review A 2002 ;66(4): 4876 UI - 10542 AU - Berman GP AU - Doolen GD AU - Lopez GV AU - Tsifrinovich VI AD - Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Fis, Guadalajara 44430, Jalisco, MexicoPolytech Univ, Metrotech Ctr 6, IDS Dept, Brooklyn, NY 11201, USABerman, GP, Los Alamos Natl Lab, CNLS, T-13, Los Alamos, NM 87545, USA TI - A quantum full adder for a scalable nuclear spin quantum computer AB - We demonstrate a strategy for implementation a quantum full adder in a,pin chain quantum computer. As an example, we simulate a quantum full adder in a chain containing 201 spins. Our simulations also demonstrate how one can minimize errors generated by non-resonant effects. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Interdisciplinary Applications;Physics, Mathematical U5 - J;Article AV - English IS - 0010-4655 UR - ISI:000177263000006 L2 - qubit;full adder;quantum computer SO - Computer Physics Communications 2002 ;146(3):324-330 4877 UI - 11929 AU - Berman GP AU - Borgonovi F AU - Izrailev FM AU - Tsifrinovich VI AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Cattolica Sacro Cuore, Dipartimento Matemat & Fis, I-2512 Brescia, ItalyINFM, Unita Brescia, Brescia, ItalyIst Nazl Fis Nucl, Sez Pavia, Pavia, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoPolytech Univ, IDS Dept, Metrotech Ctr 6, Brooklyn, NY 11201, USABerman, GP, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Avoiding quantum chaos in quantum computation AB - We study a one-dimensional chain of nuclear 1/2 spins in an external time-dependent magnetic field, considered as a possible candidate for experimental realization of quantum computation, According to the general theory of interacting particles, one of the most dangerous effects is quantum chaos that can destroy the stability of quantum operations. The standard viewpoint is that the threshold for the onset of quantum chaos due to an interaction between spins (qubits) strongly decreases with an increase of the number of qubits. Contrary to this opinion, we show that the presence of a nonhomogeneous magnetic field can strongly reduce quantum chaos effects. We give analytical estimates that explain this, effect, together with numerical data supporting our analysis MH - Italy MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000173407500007 SO - Physical Review e 2002 ;65(1): 4878 UI - 10044 AU - Berman S AU - Loinard L AD - Univ Oxford, Oxford OX1 3RH, EnglandUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoBerman, S, Univ Oxford, 1 Keble Rd, Oxford OX1 3RH, England TI - Improving the triaxial bulge model of M31 AB - A detailed hydrodynamical model of the gas flow in the triaxial gravitational potential of the bulge of the Andromeda galaxy (M31) has recently been proposed by Berman, and shown to provide excellent agreement with the CO emission-line velocities observed along its major axis. In the present paper, we confirm the validity of that model by showing that it can also reproduce the CO velocities observed off the major axis - a much more robust test. The CO observations, however, tend to span a wider range of velocities than a direct application of the original model of Berman would suggest. This situation can be improved significantly if the molecular disc is made thicker, a requirement already encountered in dynamical simulations of other spiral galaxies, and typically attributed to a broadening of the molecular layer in galactic fountain-like processes. In the central regions of M31, however, it is unclear whether there actually is a thick molecular disc, or whether broadening the molecular layer is merely an artificial theoretical means of accounting for some disc warping. Other effects not included in the model, such as hydraulic jumps, might also contribute to a widening of the range of velocities MH - United Kingdom MH - Mexico|Michoacan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000178605800017 L2 - hydrodynamics;galaxies : bulges;galaxies : evolution;galaxies : individual : M31;galaxies : ISM;galaxies : structure;COMPLETE CO SURVEY; MOLECULAR CLOUDS; INNER DISK; GALAXY; GAS; NGC-891; M-31; HALO SO - Monthly Notices of the Royal Astronomical Society 2002 ;336(2):477-482 4879 UI - 11871 AU - Bermudez-Humaran LG AU - Langella P AU - Miyoshi A AU - Gruss A AU - Guerra RT AU - de Oca-Luna RM AU - Le Loir Y AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol & Virol, San Nicolas De Los Garza, Nuevo Leon, MexicoUniv Fed Minas Gerais, Inst Ciencias Biol, Inst Biol Sci, Belo Horizonte, MG, BrazilLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - Production of human papillomavirus type 16 E7 protein in Lactococcus lactis AB - The E7 protein of human papillomavirus type 16 was produced in Lactococcus lactis. Secretion allowed higher production yields than cytoplasmic production. In stationary phase, amounts of cytoplasmic E7 were reduced, while amounts of secreted E7 increased, suggesting a phase-dependent intracellular proteolysis. Fusion of E7 to the staphylococcal nuclease, a stable protein, resulted in a highly stable cytoplasmic protein. This work provides new candidates for development of viral screening systems and for oral vaccine against cervical cancer MH - Brazil MH - France MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 42 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000173588600060 L2 - CONTROLLED GENE-EXPRESSION; ESCHERICHIA-COLI; CERVICAL-CANCER; ACID BACTERIA; SUBSP LACTIS; STREPTOCOCCI; SECRETION; DELIVERY; ANTIGEN; NUCLEAR SO - Applied and Environmental Microbiology 2002 ;68(2):917-922 4880 UI - 10302 AU - Bermudez JC AU - Pinto-Robledo VJ AU - Kir'yanov AV AU - Damzen MJ AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, EnglandDamzen, MJ, Ctr Invest Opt, Lomas Bosque 115, Leon 37150, Gto, Mexico TI - The thermo-lensing effect in a grazing incidence, diode-side-pumped Nd : YVO4 laser AB - The thermal lensing effect induced by high-power diode pumping in the grazing incidence side-pumped Nd:YVO4 laser geometry is numerically modeled and analyzed. The 3D temperature distributions and the correspondent thermally induced lens in Nd:YVO4 crystal are calculated for the straight and zig-zag paths of the laser beam. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000177840400009 L2 - Nd : YVO4;diode-pumped lasers;thermal lensing;SOLID-STATE LASERS; ND-YAG LASER; OUTPUT POWER; MICROCHIP LASER; ENERGY-STORAGE; SLAB LASERS; EFFICIENT; OPERATION; OPTIMIZATION; CRYSTAL SO - Optics Communications 2002 ;210(1-2):75-82 4881 UI - 11737 AU - Bernal-Brooks FW AU - valos-Lind L AU - Lind OT AD - Ctr Reg Invest Pesquera, Estac Limnol Patzcuaro, Patzcuaro, Michoacan, MexicoBaylor Univ, Limnol Lab, Waco, TX 76798, USABernal-Brooks, FW, Ctr Reg Invest Pesquera, Estac Limnol Patzcuaro, Calzada Ibarra 28,Colonia Ibarra, Patzcuaro, Michoacan, Mexico TI - Assessing trophic state of an endorheic tropical lake: the algal growth potential and limiting nutrients AB - Lake Zirahuen is one of Mexico's most beautiful lakes. It is apparently endorheic. The highly transparent waters with very low algal biomass characterize an oligotrophic condition. Nevertheless, the external nutrient load and the potential for internal nutrient loads in an anoxic hypolimnion predict eutrophy. To determine if the low algal biomass in the lake is due to nutrient control or to inhibition by pollution from copper goods manufacturing in the watershed, we undertook algal bioassays of the lake and inflowing stream waters. The algal growth potential of the stream water was high but was zero for the lake waters. Nutrient additions showed nitrogen and phosphorus colimitation for the lake and phosphorus limitation for the stream waters. The good growth found with added nutrients eliminates copper inhibition as the cause of the low in-lake algal growth. These data suggest that the lake is not endorheic but has significant subsurface flushing of the inflowing nutrients, and also includes internal controls precluding nutrients mobilization into the food web MH - Mexico|Michoacan MH - USA PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 2 U4 - Limnology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0003-9136 UR - ISI:000174069000009 L2 - nutrient loading;copper pollution;phosphorus nitrogen colimitation;subsurface flushing;ZIRAHUEN MEXICO; PHOSPHORUS; PHYTOPLANKTON; LIMITATION; NITROGEN; SHALLOW; EUTROPHICATION; OKEECHOBEE; SEDIMENTS; FLORIDA SO - Archiv fur Hydrobiologie 2002 ;153(2):323-338 4882 UI - 9701 AU - Bernardo JM AU - Rueda R AD - Univ Valencia, Dept Estadist & 10, E-46100 Burjassot, Valencia, SpainUNAM, IIMAS, Mexico City 01000, DF, MexicoBernardo, JM, Univ Valencia, Dept Estadist & 10, E-46100 Burjassot, Valencia, Spain TI - Bayesian hypothesis testing: a reference approach AB - For any probability model M equivalent to {p(x\theta, omega), theta is an element of Theta, omega is an element of Omega} assumed to describe the probabilistic behaviour of data x is an element of X; it is argued that testing whether or not the available data are compatible with the hypothesis H-0 equivalent to (theta = theta(0)) is best considered as a formal decision problem on whether to use(a(0)), or not to use (a(1)), the simpler probability model (or null model) M-0 equivalent to {p(x\theta(0), omega), omega is an element of Omega}, where the loss difference L(a(0), theta, omega) - L(a(1), theta, omega) is proportional to the amount of information delta(theta(0), theta, omega) which would be lost if the simplified model MO were used as a proxy for the assumed model M. For any prior distribution pi(theta, omega), the appropriate normative solution is obtained by rejecting the null model MO whenever the corresponding posterior expectation integral integral delta(theta(0), theta, omega) pi(theta, omega \ x)dtheta domega is sufficiently, large. Specification of a subjective prior is always difficult, and often polemical, in scientific communication Information theory may be used to specify a prior, the reference prior, which only depends on the assumed model M, and mathematically describes a situation where no prior information is available about the quantity of interest. The reference posterior expectation, d(theta(0), x) = integral delta pi(delta \ x)ddelta, of the amount of information delta(theta(0), theta, omega) which could be lost if the null model were used, provides an attractive non-negative test function, the intrinsic statistic, which is invariant under reparametrization. The intrinsic statistic d(theta(0), x) is measured in units of information, and it is easily calibrated (for any sample size and any dimensionality) in terms of some average long-likelihood ratios.. The corresponding Bayes decision rule the Bayesian reference criterion (BRC), indicates that the null model M-0 should only be rejected if the posterior expected loss of information from using the simplified model M-0 is too large or, equivalently, if the associated expected average log-likelihood ratio is large enough. The BRC criterion provides a general reference Bayesian solution to hypothesis testing which does not assume a probability mass concentrated on M-0 and, hence, it is immune to Lindley's paradox. The theory is illustrated within the context of multivariate normal data, where it is shown to avoid Rao's paradox on the inconsistency between univariate and multivariate frequentist hypothesis testing MH - Mexico|Distrito Federal MH - Spain PB - VOORBURG: INT STATISTICAL INST RP - NOT IN FILE U3 - TC 6 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0306-7734 UR - ISI:000179607900002 L2 - amount of information;decision theory;Lindley's paradox;loss function;model criticism;model choice;precise hypothesis testing;Rao's paradox;reference analysis;reference prior;PARAMETERS; INFERENCE; PRIORS SO - International Statistical Review 2002 ;70(3):351-372 4883 UI - 9920 AU - Beron-Vera FJ AU - Ripa P AD - Ctr Invest Cient & Educ Super Ensenada, Dept Oceanog Fis, Ensenada, Baja California, MexicoBeron-Vera, FJ, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Appl Marine Phys, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Seasonal salinity balance in the Gulf of California AB - [1] Historical data in various domains within the Gulf of California are used to describe the seasonal balance of the average salinity, [S]. The difference of evaporation minus precipitation, E - P, is positive along the course of a year. This produces a positive salinity anomaly, S', which is exported to the Pacific Ocean through the mouth of the gulf. Even though E - P has strong annual and semiannual cycles, it is not enough to explain the seasonal variation of the transport of S'. A linear one-dimensional nondiffusive inhomogeneous two-layer model suggests that the seasonal balance of [S] is largely controlled by the Pacific Ocean, which excites a baroclinic wave at the mouth of the gulf. Advection due to this wave is the main carrier of S' within the gulf, and the associated water rearrangement produces a considerable change in [S]. The Pacific Ocean has been previously shown to maintain the seasonal heat balance through a similar mechanism. This paper thus adds importance to the Pacific Ocean influence on the determination of the gulf's seasonal dynamics and thermodynamics MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 7 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000178996200007 L2 - Gulf of California;salinity balance;surface fluxes;seasonal scale;two-layer model;baroclinic motion;OF-CALIFORNIA; HEAT-BALANCE; VARIABILITY; THERMODYNAMICS; CIRCULATION SO - Journal of Geophysical Research-Oceans 2002 ;107(C8): 4884 UI - 9347 AU - Berta CL AU - Ayup SH AD - Reprolab British Hosp, Rosario, ArgentinaInst Para Estudio Concepc Humana, Monterrey, Mexico TI - Fine adjustments for a fixed dose of rec-hFSH, avoid ovarian hyper-stimulation and high order multiple pregnancy without compromising pregnancy rates in anovulatory patients MH - Argentina MH - Mexico|Nuevo Leon PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000178239400477 SO - Fertility and Sterility 2002 ;78(3):S175-S175 4885 UI - 10657 AU - Bertoin J AU - Caballero ME AD - Univ Paris 06, Probabil Lab, F-75013 Paris, FranceUniv Paris 06, Inst Univ France, F-75013 Paris, FranceUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoBertoin, J, Univ Paris 06, Probabil Lab, 175 Rue Chevaleret, F-75013 Paris, France TI - Entrance from 0+for increasing semi-stable Markov processes AB - We consider increasing semi-stable Markov processes starting at x > 0 and specify their asymptotic behaviour in law as x --> 0+. This can be viewed as an extension of a result of Brennan and Durrett on the asymptotic size of a particle undergoing a certain type of random splitting MH - France MH - Mexico|Distrito Federal PB - VOORBURG: INT STATISTICAL INST RP - NOT IN FILE U3 - TC 9 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1350-7265 UR - ISI:000177040600003 L2 - entrance boundary;fragmentation;semi-stable Markov process;subordinator SO - Bernoulli 2002 ;8(2):195-205 4886 UI - 10398 AU - Berube M AU - Urban J AU - Dizon AE AU - Brownell RL AU - Palsboll PJ AD - Univ Calif Berkeley, Ecosyst Sci Div, ESPM, Berkeley, CA 94720, USAUniv Wales, Sch Biol Sci, Bangor LL57 2UW, Gwynedd, WalesSW Fisheries Sci Ctr, Natl Marine Fisheries Serv, La Jolla, CA 92038, USAUniv Autonoma Baja California Sur, Dept Biol Marina, La Paz 23081, Baja Calif Sur, MexicoBerube, M, Univ Calif Berkeley, Ecosyst Sci Div, ESPM, Hilgard Hall 3110, Berkeley, CA 94720 USA TI - Genetic identification of a small and highly isolated population of fin whales (Balaenoptera physalus) in the Sea of Cortez, Mexico AB - For many years, researchers have speculated that fin whales are year-round residents in the Sea of Cortez (= Gulf of California). Previous work by Berube and co-workers has shown that the degree of genetic diversity among fin whales in the Sea of Cortez at nuclear and mitochondrial loci is highly reduced. However, the relatively unobstructed connection with the North Pacific Ocean argues that Sea of Cortez fin whales are part of a much larger eastern North Pacific population given the extensive migratory ranges observed in fin whales and baleen whales in general. The low degree of genetic variation might thus simply be due to historic fluctuations in the effective population size of an eastern North Pacific population. In order to test if the reduced genetic variation detected among fin whales in the Sea of Cortez is due to small population size or a past bottleneck in an otherwise large eastern North Pacific population, we analyzed the geographic distribution of genetic variation at a single mitochondrial (control region) and 16 nuclear loci in samples collected from fin whales in the eastern North Pacific (n = 12) as well as the Sea of Cortez (n = 77). Our results showed that fin whales observed in the Sea of Cortez constitute a highly isolated and thus evolutionary unique population, which warrants special conservation measures given the current low estimate of abundance of approximately 400 individuals MH - USA MH - Mexico|Baja California Sur MH - United Kingdom PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Biodiversity Conservation;Genetics & Heredity U5 - J;Review AV - English IS - 1566-0621 UR - ISI:000177685600009 L2 - California;conservation unit;genetic divergence;individual-based genealogy;management;North Pacific;MITOCHONDRIAL-DNA SEQUENCES; MEGAPTERA-NOVAEANGLIAE; HUMPBACK WHALES; MICROSATELLITE LOCI; NORTH-ATLANTIC; SPERM WHALES; NUCLEAR; WORLDWIDE; PRIMERS SO - Conservation Genetics 2002 ;3(2):183-190 4887 UI - 11132 AU - Betancourt I AU - Valenzuela R AU - Vazquez M AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCSIC, Inst Ciencia Mat, Canto Blanco 28049, SpainBetancourt, I, Univ Nacl Autonoma Mexico, Inst Invest Mat, POB 70-360, Mexico City 04510, DF, Mexico TI - Giant magnetoimpedance in Co-based microwires at low frequencies (100 Hz-13 MHz) AB - A systematic study of the complex inductance response and the giant magnetoimpedance effect of as-cast CoFeBSiMoNi microwires (30 mum diameter) as a function of frequency (100 Hz-13 MHz) and circular field amplitude (21-212 A/m rms on the wire's surface) is presented. The microwire magnetization mechanisms are discussed in terms of complex inductance plots (in both real and imaginary parts). The analysis of the experimental results showed evidence of pinning, bulging, and displacement of circumferential domain walls. Higher relaxation frequencies together with a larger unpinning field (3-5x10(6) Hz and 127 A/m, respectively), compared with conventional amorphous wires, were explained in terms of the reduced dimension of the microwire. Total impedance plots as a function of a bias H-dc field showed an asymmetric character associated with an induced anisotropy during the wire fabrication. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000175576400198 L2 - SOFT-MAGNETIC WIRES; AMORPHOUS WIRES SO - Journal of Applied Physics 2002 ;91(10):8423-8425 4888 UI - 10374 AU - Betancourt JI AU - Davies HA AD - Univ Nacl Autonoma Mexico, Inst Mat Res, Mexico City 04510, DF, MexicoUniv Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandBetancourt, JI, Univ Nacl Autonoma Mexico, Inst Mat Res, POB 70-360, Mexico City 04510, DF, Mexico TI - Coercivity mechanism in nanophase (Nd-Pr)-Fe-B melt spun alloys AB - The nucleation mechanism to predict coercivity values in melt-spun exchange-coupled (Nd1-xPrx)(y)Fe94-yB6 alloys for various Nd:Pr ratios x, and Fe:RE ratios y, was tested using the dependence of the anisotropy constant K, on Pr content x for the minimum nucleation field H-N(min) in the modified Brown's equation. Very good agreement was found between experimental data and theoretical values, confirming the predominance of the nucleation of reverse domains over the wall pinning process in the coercivity mechanism of melt spun REFeB alloys. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000177607700080 L2 - coercivity mechanism;micromagnetic model;MAGNETIC HARDENING MECHANISM; B PERMANENT-MAGNETS; ND-FE-B SO - Physica B-Condensed Matter 2002 ;320(1-4):294-296 4889 UI - 9726 AU - Betancur-Ancona D AU - Garcia-Cervera E AU - Canizares-Hernandez E AU - Chel-Guerrero L AD - Univ Autonoma Yucatan, Fac Ingn Quim, Merida 97288, VenezuelaUniv Autonaoma Campeche, Fac Ciencias Quim Biol, Campeche, MexicoBetancur-Ancona, D, Univ Autonoma Yucatan, Fac Ingn Quim, Av Juarez 421,Cd Ind,Apdo Postal 1226-A, Merida 97288, Venezuela TI - Chemical modification of Jack Bean (Canavalia ensiformis) starch by succinylation AB - Canavalia ensiformis native starch was succinylated and the functional properties of the succinylated starch evaluated. Reaction conditions investigated included: pH (8.0-8.5 and 9.0-9.5), succinic anhydride concentration (3 and 4%), temperature (20 and 30 degreesC) and reaction time (1 and 3 h). When starch was succinylated with 4% succinic anhydride, at pH 8.0-8.5, at 30 degreesC for 1 h, 1.58% succinylation was obtained. Com pared to native Canavalia starch, these succinylated products exhibited increasing paste and gel clarity, solubility (36%), swelling power (46.2 g water/g starch), and viscosity (86.5 mPas). Gelatinization temperature range was reduced to 67-73 degreesC and retrogradation was eliminated. The use of succinylated Canavalia starches as thickening and stabilizing agents in ice creams, fruit jellies, baked products, sauces and frozen foods is suggested MH - Mexico|Campeche MH - Venezuela PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0038-9056 UR - ISI:000179429200006 L2 - canavalia starch;succinylation;functional properties;FUNCTIONAL-PROPERTIES; CHICKS; SEEDS; ACID SO - Starch-Starke 2002 ;54(11):540-546 4890 UI - 10331 AU - Bevilacqua M AU - Alejandre AG AU - Resini C AU - Casagrande M AU - Ramirez J AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyUniv Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, MexicoUniv Ca Foscari Venezia, Dipartimento Chim, Mestre Venezia, ItalyBusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, Ple JF Kennedy, I-16129 Genoa, Italy TI - An FTIR study of the accessibility of the protonic sites of H-mordenites AB - The interaction of different probes with two H-MOR samples has been studied by IR. In the case of the sample with Si/Al = 10 acetonitrile perturbs all the hydroxy groups while 2,2-dimethylpropionitrile (pivalonitrile) perturbs only very few. Pyridine also perturbs all the hydroxy groups but only some of them protonate the pyridine, the others only H-bond to it. n-Hexane and 2,2-dimethylbutane give the same result, perturbing only some of the bridging hydroxy groups. The results are interpreted by assuming that no OHs are located in the 8-ring channels, and that the hydrocarbons cannot interact (due to the steric hindrance of the methyl group) with the OHs located in the side pockets. On the contrary, the at molecule pyridine can enter slightly into the side pockets and H-bond with the OHs there. Pivalonitrile interacts only with the OHs which are well exposed in the main channels. It is concluded that the active sites for alkane isomerization are likely exclusively those that are well exposed in the main channels of H-MOR and that Al substitution in the T3 sites probably does not occur. The sample with Si/Al 45, taken as an example of a dealuminated sample, presents many less bridging OHs which are entirely available for interaction with even pivalonitrile MH - Italy MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000177864000042 L2 - METAL-EXCHANGED MORDENITES; HYDROGEN-BONDED COMPLEXES; SURFACE-ACIDITY; AB-INITIO; IR SPECTROSCOPY; BRONSTED SITES; NAH-MORDENITES; OH GROUPS; ADSORPTION; ZEOLITES SO - Physical Chemistry Chemical Physics 2002 ;4(18):4575-4583 4891 UI - 9824 AU - Bharti N AU - Husain K AU - Garza MTG AU - Cruz-Vega DE AU - Castro-Garza J AU - Mata-Cardenas BD AU - Naqvi F AU - Azam A AD - Jamia Millia Islamia, Dept Chem, New Delhi 110025, IndiaIMSS, Div Biol Celular Mol, Ctr Invest, Monetary, NL, MexicoAzam, A, Jamia Millia Islamia, Dept Chem, Jamia Nagar, New Delhi 110025, India TI - Synthesis and in vitro antiprotozoal activity of 5-nitrothiophene-2-carboxaldehyde thiosemicarbazone derivatives AB - Several thiosemicarbazone derivatives of 5-nitrothiophene-2-carboxaldehyde were prepared by the simple process in which N-4-thiosemicarbazone moiety was replaced by aliphatic, arylic and cyclic amine. Among these thiosemicarbazones compound 11 showed significant antiamoebic activity whereas compound 3 was more active antitrichomonal than the reference drug. (C) 2002 Elsevier Science Ltd. All rights reserved MH - India MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Medicinal;Chemistry, Organic U5 - J;Article AV - English IS - 0960-894X UR - ISI:000179300600027 L2 - ENTAMOEBA-HISTOLYTICA; INVITRO; 2-ACETYLPYRIDINE; RESISTANCE; GIARDIA; AGENTS; MODEL SO - Bioorganic & Medicinal Chemistry Letters 2002 ;12(23):3475-3478 4892 UI - 10061 AU - Bharti N AU - Shailendra AU - Coles SJ AU - Hursthouse MB AU - Mayer TA AU - Garza MTG AU - Cruz-Vega DE AU - Mata-Cardenas BD AU - Naqvi F AU - Maurya MR AU - Azam A AD - Jamia Millia Islamia, Dept Chem, New Delhi 110025, IndiaUniv Southampton, EPSRN Natl Crystallog Serv, Dept Chem, Southampton SO9 5NH, Hants, EnglandIMSS, Ctr Invest Biomed Noreste, Div Biol Celular & Mol, Monetary, NL, MexicoIndian Inst Technol, Dept Chem, Roorkee, Uttranchal, IndiaAzam, A, Jamia Millia Islamia, Dept Chem, New Delhi 110025, India TI - Synthesis, crystal structure, and enhancement of the efficacy of metronidazole against Entamoeba histolytica by complexation with palladium(II), platinum(II), or copper(II) AB - Reaction of trans-[PdCl2(DMSO)(2)]. cis-[PtCl2(DMSO)(2)]. and [Cu(OAc)(2)](H2O)-H-. with metronidazole (mnz) leads to the formation of new complexes, i.e., trans-[PdCl2(mnz)(2)] (1), trans-[PtCl2(mnz)(2)] (2). and trans-[Cu-2(OAc)(4)(mnz)(2)] (3), respectively. Complexes 1-3 crystallize all in the centrosymmetric monoclinic space group P2(1)/c with Z = 8. Unit-cell parameters for these complexes are: 1, a = 7.1328(14) Angstrom, b = 20.699(4) Angstrom, c = 7.1455(14) Angstrom, and beta = 116.17(3)degrees; 2, a = 9.9169(14) Angstrom, b = 21.853(4) Angstrom, c = 6.7218(13) Angstrom, and beta = 110.79(3)degrees: 3. a = 9.1663(18) Angstrom, b = 19.129(4) Angstrom, c = 8.9446(18) Angstrom, and beta = 116.44(3)degrees. The complexes 1 and 2 maintain an ideal square-planar geometry. In complex 3, the H2O molecules of the starting complex are replaced by metronidazole while maintaining a dimeric structure of [Cu(OAc)(2)]. Each Cu ion has an ideal octahedral structure, though distortion occurs in the equatorial position where the acetato ligands are attached. The Cu-Cu separation of 2.6343(8) Angstrom indicates considerable metal-metal interaction. The testing of the antiamoebic activity of these complexes against the protozoan parasite Entamoeba histolytica suggests that compound 1-3 might be endowed with important antiamoebic properties since they showed IC50 values in a muM range better than metronidazole (Table 2). Thus, compound 1 displayed more effective amoebicidal activity than metronidazole (IC50 values of 0.103 muM vs. 1.50 muM resp.) MH - United Kingdom MH - India MH - Mexico|Nuevo Leon PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0018-019X UR - ISI:000178628100012 L2 - CYTOTOXIC ACTIVITY; RESISTANT; CANCER SO - Helvetica Chimica Acta 2002 ;85(9):2704-2712 4893 UI - 11295 AU - Bharti N AU - Shailendra AU - Garza MTG AU - Cruz-Vega DE AU - Castro-Garza J AU - Saleem K AU - Naqvi F AU - Maurya MR AU - Azam A AD - Jamia Millia Islamia, Dept Chem, New Delhi 110025, IndiaIMSS, Ctr Invest, Div Biol Celular Mol, Monetary, NL, MexicoUniv Roorkee, Dept Chem, Roorkee 247667, Uttar Pradesh, IndiaAzam, A, Jamia Millia Islamia, Dept Chem, New Delhi 110025, India TI - Synthesis, characterization and antiamoebic activity of benzimidazole derivatives and their vanadium and molybdenum complexes AB - Reaction of [MoO(()acac)(2)] (where, acac=acetyl acetone) and KVO3 with 2-(salicylidieneimine) benzimidazole lead to form new complexes [MoO2(sal-BMZ)(2)] and K [VO2(sal-BMZ)(2)] [where, sal-BMZ=2-(salicylidieneimine) benzimidazole], which showed the monobasic bidentate nature of the ligand in which the phenolic oxygen and the imine nitrogen of the ligand are coordinated to the metal ion. These complexes were characterized along with nine other complexes of oxoperoxovanadium (V), molybdenum (VI) and tungsten (VI) with benzimidazole derivatives and screened in vitro by micro dilution technique for their amoebicidal activity with a view to search for a more effective agent against Entamoeba histolytica suggests that compound 2 and 3 might be endowed with important antiamoebic properties since they showed IC50 values in a muM range. (C) 2002 Published by Elsevier Science Ltd MH - India MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Medicinal;Chemistry, Organic U5 - J;Article AV - English IS - 0960-894X UR - ISI:000175291700009 L2 - ENTAMOEBA-HISTOLYTICA SO - Bioorganic & Medicinal Chemistry Letters 2002 ;12(6):869-871 4894 UI - 11037 AU - Bialynicki-Birula I AU - Cirone MA AU - Dahl JP AU - Seligman TH AU - Straub F AU - Schleich WP AD - Polish Acad Sci, Ctr Theoret Phys, PL-02668 Warsaw, PolandUniv Ulm, Abt Quantenphys, D-89069 Ulm, GermanyTech Univ Denmark, Dept Chem, DK-2800 Lyngby, DenmarkUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoBialynicki-Birula, I, Polish Acad Sci, Ctr Theoret Phys, Al Lotnikow 32-46, PL-02668 Warsaw, Poland TI - Quantum fictitious forces AB - We present Heisenberg's equation of motion for the radial variable of a free non-relativistic particle in D dimensions. The resulting radial force consists of three contributions: (i) the quantum fictitious force which is either attractive or repulsive depending on the number of dimensions, (ii) a singular quantum force located at the origin, and (iii) the centrifugal force associated with non-vanishing angular momentum. Moreover, we use Heisenberg's uncertainty relation to introduce a lower bound for the kinetic energy of an ensemble of neutral particles. This bound is quadratic in the number of atoms and can be traced back to the repulsive quantum fictitious potential. All three forces arise for a free particle: "Force without force" MH - Denmark MH - Germany MH - Mexico|Morelos MH - Poland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0015-8208 UR - ISI:000175926300024 SO - Fortschritte der Physik-Progress of Physics 2002 ;50(5-7):599-607 4895 UI - 10915 AU - Bijker R AU - Iachello F AD - Univ Genoa, Dipartimento Fis, I-16146 Genoa, ItalyNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, Ctr Theoret Phys, Sloane Lab, New Haven, CT 06520, USABijker, R, Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy TI - The algebraic cluster model: Three-body clusters AB - A new method is introduced to study three-body clusters. Triangular configurations with D-3h point-group symmetry are analyzed. The spectrum. transition form factors, and B(Elambda) values of C-12 are investigated. It is concluded that the low-lying spectrum of C-12 can be described by three alpha-particles at the vertices of an equilateral triangle. but not Lis a rigid structure. Large rotation-vibration interactions. Coriolis forces, and vibration-vibration interactions are needed. Other interpretations, such as the harmonic oscillator and a soft deformed oscillator with SO(6) hyperspherical symmetry. appear to be excluded by electron scattering data. (C) 2002 Elsevier Science (USA) MH - Italy MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000176371600004 L2 - TRINUCLEAR MOLECULES; SCATTERING; SPECTRA; NUCLEI; C-12 SO - Annals of Physics 2002 ;298(2):334-360 4896 UI - 11323 AU - Bijker R AU - Frank A AD - Univ Genoa, Dipartimento Fis, I-16146 Genoa, ItalyNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoBijker, R, Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy TI - Regular spectra in the vibron model with random interactions AB - The phenomenom of emerging regular spectral features from random interactions is addressed in the context of the vibron model. A mean-field analysis links different regions of the parameter space with definite geometric shapes. The results that are, to a large extent, obtained in closed analytic form provide a clear and transparent interpretation of the high degree of order that has been observed in numerical studies MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000175186200037 L2 - 2-BODY RANDOM ENSEMBLES; ROTATION-VIBRATION SPECTRA; RANDOM POLYNOMIALS; NUCLEAR-SPECTRA; ALGEBRAIC APPROACH; GROUND-STATES; PHYSICS; SYSTEMS SO - Physical Review C 2002 ;65(4): 4897 UI - 10998 AU - Birkle P AU - Merkel B AD - Inst Invest Elect, Unidad Geotermia, Cuernavaca 62001, Morelos, MexicoTech Univ Freiberg, Inst Geol, D-09596 Freiberg, GermanyBirkle, P, Inst Invest Elect, Unidad Geotermia, AP 1-475, Cuernavaca 62001, Morelos, Mexico TI - Mineralogical-chemical composition and environmental risk potential of pond sediments at the geothermal field of Los Azufres, Mexico (vol 41, pg 583, 2002) MH - Germany MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Correction AV - English IS - 0943-0105 UR - ISI:000176038700017 SO - Environmental Geology 2002 ;42(1):116-116 4898 UI - 11906 AU - Birkle P AU - Merkel B AD - Inst Invest Elect, Unidad Geotermia, Cuernavaca 62001, Morelos, MexicoTech Univ Freiberg, Inst Geol, D-09596 Freiberg, GermanyBirkle, P, Inst Invest Elect, Unidad Geotermia, AP 1-475, Cuernavaca 62001, Morelos, Mexico TI - Mineralogical-chemical composition and environmental risk potential of pond sediments at the geothermal field of Los Azufres, Mexico AB - Since 1982, estimated amounts of 9,400 t, 15,000 kg, 720 kg and 105 kg of Si, Fe, As and Cs respectively have accumulated at the bottom of 18 evaporation ponds as part of the geothermal production cycle at Los Azufres. This accumulation is caused by precipitation of brine solutes during the evaporation of 10% of the total pond water volume before its re-injection into the reservoir. Extraction experiments with pond precipitates and geochemical simulations with the PHREEQC program indicate the high solubility of most precipitates under natural environmental conditions. The comparisons with the primary brine composition indicate that less than 1% of most dissolved brine solutes, except for Co, Cu, Mn, Pb, Ag, Fe and Si, are accumulated at the pond bottom. Arsenic has maximum values of 160 mg/kg in the pond sediments, and Mo, Hg and Tl also exceed international environmental standards for contaminated soils. Elevated concentrations and the mobility potential of several metals and non-metals require the application of remediation techniques for the final disposal of the sediments in the future MH - Germany MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000173634400011 L2 - Los Azufres;geothermal field;pond sediments;environmental impact;IMPACT SO - Environmental Geology 2002 ;41(5):583-592 4899 UI - 11196 AU - Birkner M AU - Lopez-Mimbela JA AU - Wakolbinger A AD - Univ Frankfurt, Fachbereich Math, D-60054 Frankfurt, GermanyCtr Invest Matemat, Guanajuato 36000, MexicoBirkner, M, Univ Frankfurt, Fachbereich Math, D-60054 Frankfurt, Germany TI - Blow-up of semilinear PDE's at the critical dimension. A probabilistic approach AB - We present a probabilistic approach which proves blow-up of solutions of the Fujita equation partial derivativew/partial derivativet = -(-Delta)(alpha/2)w+w(1+beta) in the critical dimension d = alpha/beta. By using the Feynman-Kac representation twice, we construct a subsolution which locally grows to infinity as t-->infinity. In this way, we cover results proved earlier by analytic methods. Our method also applies to extend a blow-up result for systems proved for the Laplacian case by Escobedo and Levine (1995) to the case of alpha-Laplacians with possibly different parameters alpha MH - Germany MH - Mexico|Guanajuato PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000175300300034 L2 - blow-up of semilinear systems;Feynman-Kac representation;symmetric stable processes;SYSTEM SO - Proceedings of the American Mathematical Society 2002 ;130(8):2431-2442 4900 UI - 10282 AU - Biswas I AU - Brambila-Paz L AU - Gomez TL AU - Newstead PE AD - Tata Inst Fundamental Res, Sch Math, Mumbai 400005, IndiaCIMAT, Guanajuato 36240, MexicoUniv Liverpool, Dept Math Sci, Liverpool L69 7ZL, Merseyside, EnglandBiswas, I, Tata Inst Fundamental Res, Sch Math, Homi Bhabha Rd, Mumbai 400005, India TI - Stability of the Picard bundle AB - Let X be a non-singular algebraic curve of genus g greater than or equal to 2, n greater than or equal to 2 an integer, xi a line bundle over X of degree d > 2n(g - 1) with (n, d) = 1 and M-xi the moduli space of stable bundles of rank n and determinant xi over X. It is proved that the Picard bundle W-xi is stable with respect to the unique polarisation of M-xi MH - United Kingdom MH - India MH - Mexico|Guanajuato PB - LONDON: LONDON MATH SOC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0024-6093 UR - ISI:000178057600005 L2 - STABLE VECTOR-BUNDLES; ALGEBRAIC CURVE; MODULI SPACE SO - Bulletin of the London Mathematical Society 2002 ;34():561-568 4901 UI - 11516 AU - Biswas I AU - Brambila-Paz L AD - Tata Inst Fundamental Res, Sch Math, Bombay 400005, Maharashtra, IndiaCIMAT, Guanajuato, MexicoBiswas, I, Tata Inst Fundamental Res, Sch Math, Homi Bhabha Rd, Bombay 400005, Maharashtra, India TI - Infinitesimal deformations of a Calabi-Yau hypersurface of the moduli space of stable vector bundles over a curve AB - Let X be a compact connected Riemann surface of genus g, with g greater than or equal to 2, and M-xi a smooth moduli space of fixed determinant semistable vector bundles of rank n, with n greater than or equal to 2, over X. Take a smooth anticanonical divisor D on M-xi. So D is a Calabi-Yau variety. We compute the number of moduli of D, namely dim H-1 (D, T-D), to be 3g - 4 + dim H-0(M-xi, K-Mxi(-1)). Denote by N the moduli space of all such pairs (X-1, D-1), namely D-1 is a smooth anticanonical divisor on a smooth moduli space of semistable vector bundles over the Riemann surface X-1. It turns out that the Kodaira-Spencer map from the tangent space to N, at the point represented by the pair (X, D), to H-1 (D, T-D) is an isomorphism. This is proved under the assumption that if g = 2, then n not approximate to 2, 3, and if g = 3, then n not approximate to 2 MH - India MH - Mexico|Guanajuato PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0075-4102 UR - ISI:000174652100001 L2 - ALGEBRAIC CURVE SO - Journal fur Die Reine und Angewandte Mathematik 2002 ;544():1-12 4902 UI - 11313 AU - Blanchon P AU - Jones B AU - Ford DC AD - Natl Autonomous Univ Mexico, ICML, Coral Reef Syst Unit, UA Pto Morelos, Cancun 77500, Q Roo, MexicoUniv Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, CanadaMcMaster Univ, Sch Geog & Geol, Hamilton, ON L8S 4K1, CanadaBlanchon, P, Natl Autonomous Univ Mexico, ICML, Coral Reef Syst Unit, UA Pto Morelos, Ap Postal 1152, Cancun 77500, Q Roo, Mexico TI - Discovery of a submerged relic reef and shoreline off Grand Cayman: further support for an early Holocene jump in sea level AB - Drilling close to the base of a submerged sea-cliff on the terraced eastern shelf of Grand Cayman has revealed a relic Acropora palmata reef at a depth of 21 in below msl. Ten cores from its crest are principally composed of cobble-sized clasts of A. palmata set in a matrix of cemented skeletal grainstone. The clasts have a distinctive succession of encrusters that indicate rapid burial: a photophilic association of crustose coralline algae, foraminifera and vermetid gastropods superimposed by a cryptic association of sclerosponges, foraminifera and serpulids. In addition to rapid burial, U-Th thermal ionization mass spectrometer (TIMS) dating of coral clasts within I in of the relic-reef surface indicates minor temporal mixing with ages between 8.9 and 8.1 ka. Such mixing and rapid burial is consistent with a hurricane deposit and is identical to deposits found on the crests of modern reefs. In relation to its age, the preservation of a - 18.5-m intertidal notch cut into the submerged sea-cliff on the,western shelf of Grand Cayman implies that the crest of the relic reef has been lowered 1.5-2 in by marine abrasion,/ bioerosion at a rate of similar to 0.25 mm yr(-1). Reconstructing this eroded section using average Holocene accretion rates indicates that the reef likely ceased accreting at similar to 7.6 ka at a depth of similar to 19 in. Comparing these data with other relic reefs in the Caribbean indicates that the relic reef on Grand Cayman died within 160 years of relic reefs on Barbados, St. Croix, St. Thomas and north Florida. This narrow interval of reef demise also coincides with the time when modem reefs were establishing themselves some 4-9 m higher upslope-a fact that can only be resolved by invoking a rapid 6-m jump in sea level similar to 7.5 ka ago. Such a jump would also account for two unexplained events around this time: the restricted interval of global delta initiation and the catastrophic flooding of the glacially lowered Black Sea. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Quintana Roo PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000175097500002 L2 - Holocene;drowned reef;pateoshoreline;reef development;U-Th dating;Caribbean;MID-PACIFIC ISLAND; BLACK-SEA; CONTINUOUS RECORD; FRINGING-REEF; YOUNGER DRYAS; CORAL REEFS; TH-230 AGES; NEW-YORK; SHELF; GROWTH SO - Sedimentary Geology 2002 ;147(3-4):253-270 4903 UI - 10621 AU - Blanco-Pinon A AU - Frey E AU - Stinnesbeck W AU - Oliva JGL AD - Staatl Museum Naturkunde Karlsruhe, D-76133 Karlsruhe, GermanyUniv Karlsruhe, Inst Geol, D-76128 Karlsruhe, GermanyUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares, NL, MexicoBlanco-Pinon, A, Staatl Museum Naturkunde Karlsruhe, Erbpinzenstr 13, D-76133 Karlsruhe, Germany TI - Late Cretaceous (Turonian) fish assemblage from Vallecillo, Northeastern Mexico AB - At Vallecillo, in the Mexican state of Nuevo Leon, fine-grained laminated marlstones of the Turonian Agua Nueva Formation contain a diverse and well-preserved fish fauna. Here we report on the presence of 13 taxa (most of them on a generic or family level) of which most are first occurrences for the Western Tethys during the Turonian. The fauna also suggests that faunal interchange existed between the Western Tethys and the Western Interior Seaway as well as the eastern part of the Tethys MH - Germany MH - Mexico|Nuevo Leon PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 10 U4 - Paleontology U5 - J;Article AV - English IS - 0077-7749 UR - ISI:000177007800003 L2 - TELEOSTEI; MOROCCO; LOCALITY; SHARKS; KANSAS SO - Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 2002 ;225(1):39-54 4904 UI - 11425 AU - Blasco JL AU - Garcia-Sanchez MA AU - Ruiz-Herrera J AU - Eslava AP AU - Iturriaga EA AD - Univ Salamanca, Area Genet, Dept Microbiol & Genet, Edificio Dept,Area Genet, E-37007 Salamanca, SpainIPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Dept Ingn Genet, Irapuato, Gto, MexicoIturriaga, EA, Univ Salamanca, Area Genet, Dept Microbiol & Genet, Edificio Dept,Area Genet, Lab 301,Avda Campo Charro S-N, E-37007 Salamanca, Spain TI - A gene coding for ornithine decarboxylase (odcA) is differentially expressed during the Mucor circinelloides yeast-to-hypha transition AB - The differential display technique was used to identify genes from Mucor circinelloides involved in the yeast-to-hypha transition. Using a limited set of primer combinations, cDNA fragments corresponding to mRNAs differentially expressed during the dimorphic transition were isolated. Northern analyses showed that the accumulation of the transcript detected by hybridisation with one of the cDNA fragments increased during the transition and was undetectable at the mycelial stage. Sequence analysis and database searches of this fragment revealed high similarity to ornithine decarboxylase (ODC) encoding genes. The odcA gene of M. circinelloides was isolated from genomic and cDNA libraries and characterised. Electrophoretic karyotyping and hybridisations showed that the odcA gene is single-copy and linked to the leuA and rDNA genes. The single transcript detected (2.1 kb), was considerably longer than the deduced ORE Through non-radioactive primer extension analysis four transcription initiation sites were mapped to positions -61, -167, -239 and -436 from the start codon. The ODC mRNA levels increased during the yeast-to-hypha transition, reaching a maximum at 120 min, which was accompanied by a rise in ODC enzymatic activity. The expression pattern of the odcA gene showed that in M. circinelloides the ODC levels are transcriptionally regulated, in contrast with other dimorphic fungi in which a post-transcriptional regulation has been proposed. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 0923-2508 UR - ISI:000174873100005 L2 - differential display;dimorphism;Mucor;ornithine decarboxylase;polyamines;fungal differentiation;electrophoretic karyotype;DISPLAY-RT-PCR; SACCHAROMYCES-CEREVISIAE; CANDIDA-ALBICANS; MESSENGER-RNAS; SEQUENCE; TRANSFORMATION; POLYAMINES; FUNGUS; DIMORPHISM; CLONING SO - Research in Microbiology 2002 ;153(3):155-164 4905 UI - 11190 AU - Blasco O AU - Perez-Esteva S AD - Univ Valencia, Dept Matemat, E-46100 Valencia, SpainUniv Nacl Autonoma Mexico, Unidad Cuernavaca, Cuernavaca 62251, Morelos, MexicoBlasco, O, Univ Valencia, Dept Matemat, E-46100 Valencia, Spain TI - The Bergman projection on weighted spaces: L-1 and Herz spaces AB - find necessary and sufficient conditions on radial weights w on the unit disc so that the Bergman type projections of Forelli-Rudin are bounded on L-1(w) and in the Herz spaces K-p(q)(w) MH - Mexico|Morelos MH - Spain PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0039-3223 UR - ISI:000175368200004 SO - Studia Mathematica 2002 ;150(2):151-162 4906 UI - 11217 AU - Bliss FA AU - Arulsekar S AU - Foolad MR AU - Becerra V AU - Gillen AM AU - Warburton ML AU - Dandekar AM AU - Kocsisne GM AU - Mydin KK AD - Univ Calif Davis, Dept Pomol, Davis, CA 95616, USAPenn State Univ, Dept Hort, University Pk, PA 16802, USAInst Invest Agropecuarias, CRI Quilampu, Chillan, ChileCIMMYT, Appl Biotechnol Ctr, Mexico City 06600, DF, MexicoUniv Veszprem, Georgikon Fac Agron, Dept Hort, H-8360 Keszthely, HungaryRubber Res Inst India, Kottayam 686009, Kerala, IndiaBliss, FA, Seminis Inc, Woodland, CA 95695, USA TI - An expanded genetic linkage map of Prunus based on an interspecific cross between almond and peach AB - The genetic linkage map of Prunus constructed earlier and based on an interspecific F-2 population resulting from a cross between almond (Prunus dulcis D.A. Webb) and peach (Prunus persica L. Batsch) was extended to include 8 isozyme loci, 102 peach mesocarp cDNAs, 11 plum genomic clones, 19 almond genomic clones, 7 resistance gene analogs (RGAs), 1 RGA-related sequence marker, 4 morphological trait loci, 3 genes with known function, 4 simple sequence repeat (SSR) loci, 1 RAPD, and 1 cleaved amplified polymorphic sequence (CAP) marker. This map contains 161 markers placed in eight linkage groups that correspond to the basic chromosome number of the genus (x = n = 8) with a map distance of 1144 centimorgans (cM) and an average marker density of 6.8 cM. Four more trait loci (Y, Pcp, D, and SK) and one isozyme locus (Mdh1) were assigned to linkage groups based on known associations with linked markers. The linkage group identification numbers correspond to those for maps published by the Arus group in Spain and the Dirlewanger group in France. Forty-five percent of the loci showed segregation distortion most likely owing to the interspecific nature of the cross and mating system differences between almond (obligate outcrosser) and peach (selfer). The Cat1 locus, known to be linked to the D locus controlling fruit acidity, was mapped to linkage group 5. A gene or genes controlling polycarpel fruit development was placed on linkage group 3, and control of senesced leaf color (in late fall season) (LFCLR) was mapped to linkage group 1 at a putative location similar to where the Y locus has also been placed MH - Chile MH - Hungary MH - India MH - Mexico|Distrito Federal MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 25 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000175373300010 L2 - Prunus;molecular markers;RFLPs;resistance gene analogs (RGAs);polycarpel fruit;stone fruits;PERSICA L. BATSCH; RESISTANCE GENES; SEGREGATION DISTORTION; MOLECULAR MARKERS; RAPD MARKERS; SWEET CHERRY; AFLP MARKERS; SOUR CHERRY; ISOZYME; PCR SO - Genome 2002 ;45(3):520-529 4907 UI - 9939 AU - Block DL AU - Bournaud F AU - Combes F AU - Puerari I AU - Buta R AD - Univ Witwatersrand, Sch Computat & Appl Math, ZA-2050 Wits, South AfricaObserv Paris, LERMA, F-75014 Paris, FranceEcole Normale Super, F-75005 Paris, FranceInst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USABlock, DL, Univ Witwatersrand, Sch Computat & Appl Math, Private Bag 3, ZA-2050 Wits, South Africa TI - Gravitational torques in spiral galaxies: Gas accretion as a driving mechanism of galactic evolution AB - The distribution of gravitational torques and bar strengths in the local Universe is derived from a detailed study of 163 galaxies observed in the near-infrared. The results are compared with numerical models for spiral galaxy evolution. It is found that the observed distribution of torques can be accounted for only with external accretion of gas onto spiral disks. Accretion is responsible for bar renewal - after the dissolution of primordial bars - as well as the maintenance of spiral structures. Models of isolated, non-accreting galaxies are ruled out. Moderate accretion rates do not explain the observational results: it is shown that galactic disks should double their mass in less than the Hubble time. The best fit is obtained if spiral galaxies are open systems, still forming today by continuous gas accretion, doubling their mass every 10 billion years MH - France MH - Mexico|Puebla MH - South Africa MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178885000002 L2 - galaxies : formation;galaxies : evolution;galaxies : spiral;galaxies : fundamental parameters;BARRED GALAXIES; BARS SO - Astronomy & Astrophysics 2002 ;394(3):L35-L38 4908 UI - 10159 AU - Blood-Siegfried J AU - Nyska A AU - Lieder H AU - Joe M AU - Vega L AU - Patterson R AU - Germolec D AD - Duke Univ, Sch Nursing, Durham, NC 27710, USANIEHS, Environm Immunol Lab, Res Triangle Pk, NC 27709, USACINVESTAV, Secc Externa Toxicol, Mexico City 07360, DF, MexicoBlood-Siegfried, J, Duke Univ, Sch Nursing, Box 3322, Durham, NC 27710 USA TI - Synergistic effect of influenza A virus on endotoxin-induced mortality in rat pups: A potential model for sudden infant death syndrome AB - Sudden infant death syndrome is the most common cause of postneonatal infant mortality in the developed world. It is a diagnosis of exclusion with peak age of incidence between 2 and 6 mo. Fifty to 63% of these infants have a preexisting upper respiratory tract infection before death. We hypothesized that the immature immune system may be altered by a primary infection, preventing a protective response after secondary challenge. To mimic dual infection, we used a nonlethal strain of a rat-adapted influenza A virus and a sublethal dose of endotoxin to establish a model that results in pathology and death in 12-d-old rat pups similar to that seen in infants dying of sudden infant death syndrome. Mortality only occurred when specific criteria such as timing between infectious insults and developmental age of the pup were met. Results suggest that mortality is caused by a rapid systemic shock event rather than lung-specific damage. Gross pathologic findings such as lung petechiae and liquid blood around the heart on necropsy were consistent with those seen in infants dying of sudden infant death syndrome. Histopathologic lesions including subendocardial hemorrhage and mild cortical thymocyte necrosis were found with greater severity and frequency in dually challenged animals. Macrophage subpopulation in rat-adapted influenza A virus-inoculated animals was significantly elevated in the spleen at the time of death. Our model suggests that the developing immune system can be primed to respond in an exaggerated way to a second immune challenge resulting in unexpected death MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 5 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-3998 UR - ISI:000178291500005 L2 - UPPER RESPIRATORY-TRACT; NITRIC-OXIDE SYNTHASE; A VIRUS; CEREBROSPINAL-FLUID; BACTERIAL TOXINS; LETHAL SYNERGY; IMMUNE-SYSTEM; SYNDROME SIDS; CELL-DEATH; INFECTION SO - Pediatric Research 2002 ;52(4):481-490 4909 UI - 7015 AU - Blumenkranz MS AU - Quiroz-Mercado H AU - Sanislo SR AU - Garcia G AU - Dubnack S AU - Palanker DV AD - Stanford Univ, Sch Med, Stanford, CA 94305, USAAPEC, Mexico City, DF, MexicoCarl Zeiss Inc, Jena, Germany TI - The Pulsed Electron Avalanche Knife (PEAK (TM)) for intraocular surgery in patients with proliferative vitreoretinal disorders MH - Germany MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606700157 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U845-U845 4910 UI - 9491 AU - Boda D AU - Henderson D AU - Teran LMY AU - Sokolowski S AD - Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USAUniv Veszprem, Dept Phys Chem, H-8201 Veszprem, HungaryUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoMarie Curie Sklodowska Univ, Dept Modeling Physicochem Properties, PL-20031 Lublin, PolandHenderson, D, Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA TI - The application of density functional theory and the generalized mean spherical approximation to double layers containing strongly coupled ions AB - Density functional theory (DFT) is the most successful simple theory for ions near an electrode (the double layer), However, most previous applications of DFT have been for ions that are relatively weakly coupled; Interesting effects have been found in simulations for ions that are strongly coupled. Specifically, drying of the electrode with a resultant large increase in the magnitude of the adsorption is observed. Further, the capacitance decreases with increasing coupling. The DFT formalism requires the direct correlation function of the bulk electrolyte as input. If the bulk electrolyte is treated by means of the mean spherical approximation (MSA), DFT fails to account for these phenomena. However, if the bulk electrolyte is treated by means of a generalized MSA, partial. success results. The electrolyte dries the electrode but the lowering of the capacitance is predicted only weakly. Further refinements are necessary for full success MH - Hungary MH - Mexico|Distrito Federal MH - Poland MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 21 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000180158800006 L2 - ELECTRICAL DOUBLE-LAYER; CHARGED HARD-SPHERES; LOW-TEMPERATURE ANOMALIES; INTEGRAL-EQUATION; PRIMITIVE MODEL; ELECTROCHEMICAL INTERFACE; MONTE-CARLO; ELECTROLYTES; CAPACITANCE; MIXTURES SO - Journal of Physics-Condensed Matter 2002 ;14(46):11945-11954 4911 UI - 10055 AU - Body JJ AU - Gaich GA AU - Scheele WH AU - Kulkarni PM AU - Miller PD AU - Peretz A AU - Dore RK AU - Correa-Rotter R AU - Papaioannou A AU - Cumming DC AU - Hodsman AB AD - Eli Lilly & Co, Lilly Res Labs, Lilly Corp Ctr, Indianapolis, IN 46285, USAFree Univ Brussels, Inst Jules Bordet, Dept Med, B-1000 Brussels, BelgiumColorado Ctr Bone Res, Lakewood, CO 80227, USACtr Hosp Univ Brugmann, Rheumatol Clin, B-1020 Brussels, BelgiumInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Nephrol & Mineral Metab, Mexico City 14000, DF, MexicoMcMaster Univ, Dept Med, Hamilton, ON L8N 3Z5, CanadaUniv Alberta, Royal Alexandra Hosp, Dept Obstet & Gynecol, Edmonton, AB T5H 3V9, CanadaSt Josephs Hlth Care Ctr, Dept Med, London, ON, CanadaUniv Western Ontario, Lawson Hlth Res Inst, London, ON N6A 4V2, CanadaBody, JJ, Eli Lilly & Co, Lilly Res Labs, Lilly Corp Ctr, Indianapolis, IN 46285 USA TI - A Randomized double-blind trial to compare the efficacy of teriparatide [recombinant human parathyroid hormone (1-34)] with alendronate in postmenopausal women with osteoporosis AB - Teriparatide (rDNA origin) injection [recombinant human PTH (1-34)] stimulates bone formation, increases bone mineral density (BMD), and restores bone architecture and integrity. In contrast, bisphosphonates reduce bone resorption and increase BMD. We compared the effects of teriparatide and alendronate sodium on BMD, nonvertebral fracture incidence, and bone turnover in 146 postmenopausal women with osteoporosis. Women were randomized to either once-daily sc injections of teriparatide 40 mug plus oral placebo (n = 73) or oral alendronate 10 mg plus placebo injection (n = 73). Median duration of treatment was 14 months. At 3 months, teriparatide increased lumbar spine BMD significantly more than did alendronate (P < 0.001). Lumbar spine-BMD in-creased by 12.2% in the teriparatide group and 5.6% in the alendronate group (P < 0.001 teriparatide vs. alendronate). Teriparatide increased femoral neck BMD and total body bone mineral significantly more than did alendronate, but BMD at the one third distal radius decreased, compared with alendronate (P less than or equal to 0.05). Nonvertebral fracture incidence was significantly lower in the teriparatide group than in the alendronate group (P < 0.05). Both treatments were well tolerated despite transient mild asymptomatic hypercalcemia with teriparatide treatment. In conclusion, teriparatide, a bone formation agent, increased BMD at most sites and decreased nonvertebral fractures more than alendronate MH - Belgium MH - Canada MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 100 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000178649800021 L2 - BONE-MINERAL DENSITY; DIFFERENT SKELETAL SITES; FRACTURE RISK; CORTICAL BONE; THERAPY; STRENGTH; PREDICTION; PREVENTION; THICKNESS; LY333334 SO - Journal of Clinical Endocrinology and Metabolism 2002 ;87(10):4528-4535 4912 UI - 11169 AU - Boege M AU - Dydak J AU - Jimenez R AU - Koyama A AU - Shchepin EV AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoOsaka Kyoiku Univ, Div Math Sci, Kashiwara, Osaka 5828582, JapanUniv Tennessee, Dept Math, Knoxville, TN 37996, USAVA Steklov Math Inst, Moscow 117966, Russia TI - Borsuk-Sieklucki theorem cohomological dimension theory AB - The Borsuk-Sieklucki theorem says that for every uncountable family {X-alpha}alphais an element ofA of n-dimensional closed subsets of an n-dimensional ANR-compactum, there exist alphanot equalbeta such that dim(X-alpha boolean AND Xbeta) = n. In this paper we show a cohomological version of that theorem: THEOREM. Suppose a compactum X is clc(Z)(n+1), where n greater than or equal to 1, and G is an Abelian group. Let {X-alpha}(alpha=J) be an uncountable family of closed subsets of X. If dim(G)X = dim(G)X(alpha), = n for all alpha is an element of J, then dim(G) (X-alpha boolean AND X-beta) = n for some alpha not equal beta. For G being a countable principal ideal domain the above result was proved by Choi and Kozlowski [C-K]. Independently, Dydak and Koyama [D-K] proved it for G being an arbitrary principal ideal domain and posed the question of validity of the Theorem for quasicyclic groups (see Problem 1 in [D-K]). As applications of the Theorem we investigate equality of cohomological dimension and strong cohomological dimension, and give a characterization of cohomological dimension in terms of a special base MH - Japan MH - Mexico|Morelos MH - Russia MH - USA PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0016-2736 UR - ISI:000175453400002 L2 - cohomological dimension;cohomology locally n-connected compacta;ANR;descending chain condition SO - Fundamenta Mathematicae 2002 ;171(3):213-222 4913 UI - 11685 AU - Bogdanchikova N AU - Meunier FC AU - valos-Borja M AU - Breen JP AU - Pestryakov A AD - UNAM, Ctr Ciencias Mat Consenada, Ensenada 22800, Baja California, MexicoQueens Univ Belfast, Sch Chem, Belfast BT9 5AG, Antrim, North IrelandTomsk State Univ Civil Engn, Tomsk 634003, RussiaBogdanchikova, N, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - On the nature of the silver phases of Ag/Al2O3 catalysts for reactions involving nitric oxide AB - The nature of the silver phases of Ag/Al2O3 catalysts (prepared by silver nitrate impregnation followed by calcination) was investigated by X-ray diffractograms (XRD), transmission electron microscopy (TEM) and UV-VIS analyses and related to the activity of the corresponding materials for the oxidation of NO to NO2. The UV-VIS spectrum of the 1.2 wt.% Ag/Al2O3 exhibited essentially one band associated with Ag+ species and the NO2 yields measured over this material were negligible. A 10 wt.% Ag/Al2O3 material showed the presence of oxidic species of silver (as isolated Ag+ cations and silver aluminate), but the UV-VIS data also revealed the presence of some metallic silver. The activity for the NO oxidation to NO2 of this sample was moderate. The same 10% sample either reduced in H-2 or used for the C3H6-selective catalytic reduction (SCR) of NO showed a significantly larger proportion of silver metallic phases and these samples displayed a high activity for the formation of NO2. These data show that the structure and nature of the silver phases of Ag/Al2O3 catalysts can markedly change under reaction feed containing only a fraction of reducing agent (i.e. 500 ppm of propene) in net oxidizing conditions (2.5% O-2). The low activity for N-2 formation during the C3H6-SCR of NO (reported in an earlier study) over the high loading sample can. therefore, he related to the presence of metallic silver. which is yet a good catalyst for NO oxidation to NO2. The reverse observations apply for the oxide species observed over the low loading sample, which is a good SCR catalyst but do not oxidize NO to NO2. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California MH - United Kingdom MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 40 U4 - Chemistry, Physical;Engineering, Environmental;Engineering, Chemical U5 - J;Article AV - English IS - 0926-3373 UR - ISI:000174141800004 L2 - NO;NOx;silver;alumina;XRD;UV-VIS;TEM;LEAN NOX REDUCTION; SELECTIVE REDUCTION; SILVER/ALUMINA CATALYSTS; ALUMINA CATALYSTS; DIESEL-ENGINES; PROPENE; HYDROCARBONS; ETHANOL; EXHAUST; SO2 SO - Applied Catalysis B-Environmental 2002 ;36(4):287-297 4914 UI - 11036 AU - Bohm AR AU - Kielanowski P AD - Univ Texas, Dept Phys, Austin, TX 78712, USACINVESTAV, IPN, Dept Fis, Mexico City, DF, MexicoBohm, AR, Univ Texas, Dept Phys, Austin, TX 78712, USA TI - Time asymmetric quantum theory and the Z-boson mass and width AB - A unified theory of resonance and decay phenomena is presented for the non-relativistic and the relativistic cafes. It incorporates causality and time asymmetry. The relativistic quasistable particles are described by semigroup representations of the causal Poincare transformations characterized by spin j and complex square mass s(R) = (M-R - iGamma(R)/2)(2), where FR is the width of a relativistic Breit-Wigner, scattering amplitude. The lifetime of the exponentially decaying state described by this semigroup representation, [j, s(R)] is derived as tau = h/Gamma(R). This provides a criterion for the appropriate definition of the mass and width of a relativistic resonance MH - Mexico|Distrito Federal MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0015-8208 UR - ISI:000175926300010 L2 - RIGGED HILBERT-SPACE; ELECTROWEAK SO - Fortschritte der Physik-Progress of Physics 2002 ;50(5-7):496-502 4915 UI - 9326 AU - Bohnel H AU - gado-Argote LA AU - Kimbrough DL AD - UNAM, Ctr Geociencias, Queretaro 76230, MexicoCICESE, Dept Geol, Ensenada 22860, Baja California, MexicoSan Diego State Univ, Dept Geol Sci, San Diego, CA 92182, USABohnel, H, UNAM, Ctr Geociencias, Campus Juriquilla, Queretaro 76230, Mexico TI - Discordant paleomagnetic data for middle-Cretaceous intrusive rocks from northern Baja California: Latitude displacement, tilt, or vertical axis rotation? AB - [1] Paleomagnetic results and U/Pb zircon dating from the San Marcos dike swarm and the El Testerazo pluton in the Cretaceous Peninsular Ranges batholith of northern Baja California are used to evaluate alternative pre-Neogene paleogeographic reconstructions of the Baja California peninsula. The San Marcos dike swarm is a dense, northwest striking, regional dike swarm that is exposed over an similar to100 km long segment of the batholith and has yielded a U/Pb zircon crystallization age of 120 +/- 1 Ma. Dike attitudes from the swarm suggest a regionally consistent average similar to320degreesE strike and similar to79degreesNE dip. The El Testerazo pluton is a younger tonalite intrusion that truncates the northern end of the dike swarm. All but one of 36 sites sampled in this study show remanence of normal polarity. Paleopoles for the San Marcos dike swarm and El Testerazo pluton are indistinguishable and were combined into a paleopole at 248.1degreesE, 86.6degreesN, A(95) = 4.8degrees, which is displaced with respect to the 122 Ma reference pole for stable North America at 198.2degreesE, 72.3degreesN, A(95) =3.3degrees. The displacement may be described by an apparent clockwise rotation of 18degrees +/- 6degrees and an apparent northward shift of 8degrees +/- 5degrees. Restoring a northward shift of about 3degrees, related to the separation of Baja California from North America since 10 Ma, only a marginal northward displacement of 5degrees +/- 5degrees is left. The clockwise rotation may be the result of crustal block rotations within the right-lateral shear systems in northern Baja California, although there is no geological evidence that supports this possibility. Alternatively, the difference between paleopole and reference pole may be due to tilting of the study area. Restoring a northeastward tilt of 11degrees, based on the mean dip measured for the San Marcos dike swarm in the study area, yields a paleopole at 187.6degreesE, 70.8degreesN, A(95) = 5.6degrees, which is indistinguishable from the 122 Ma North American reference pole. The tilting hypothesis suggested previously as a potential explanation for low inclination of paleomagnetic data from Baja California therefore seems to be viable for the discordant paleopoles from this segment of the batholith. Data obtained previously about 150 km further south and along the western edge of the batholith defined a concordant paleopole without any tilt correction, indicating that regional tilting may not be valid for all of Baja California MH - Mexico|Baja California MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0278-7407 UR - ISI:000180397400013 L2 - paleomagnetism;Baja California;paleogeography;Cretaceous;intrusive rocks;geochronology;LOS-CABOS BLOCK; NORTHWARD TRANSPORT; SOUTHERN-CALIFORNIA; CONSTRAINTS; COASTAL; MARGIN; PENINSULA; AMERICA; MEXICO; OFFSET SO - Tectonics 2002 ;21(5): 4916 UI - 9526 AU - Bohnel H AU - McIntosh G AU - Sherwood G AD - UNAM, Ctr Geociencias, Queretaro 76230, MexicoUniv Complutense Madrid, Dept Fis Tierra Astron & Astrofis 1, Madrid 28040, SpainLiverpool John Moores Univ, Sch Biol & Earth Sci, Liverpool L3 3AF, Merseyside, EnglandGeoforschungszentrum Potsdam, D-14473 Potsdam, GermanyBohnel, H, UNAM, Ctr Geociencias, Campus Juriquilla, Queretaro 76230, Mexico TI - A parameter characterising the irreversibility of thermomagnetic curves AB - Previous attempts to quantify the degree of irreversibility of thermomagnetic curves have compared magnetisation during the heating and cooling cycles at a particular temperature, e.g. 100 degreesC. This may not give a true indication of the degree of irreversibility, as a coincidence at that temperature may occur when the thermomagnetic curve is irreversible. We suggest a new quantitative irreversibility parameter, IP, which is based on the area between the heating and cooling branches of the thermomagnetic curve. Accidental coincidences or crossovers of the branches at certain temperatures do not affect this parameter. For reversible thermomagnetic curves IP = 0. In cases of strongly reduced magnetisation, e.g. due to oxidation processes during heating, IP may approach a value of -1, while for strongly increased magnetisation after heating, e.g. in the case of pyrrhotite-bearing samples, IP may exceed 1. The parameter may be also determined from high- and low-temperature variation curves of magnetic susceptibility. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Queretaro MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 1474-7065 UR - ISI:000179936900022 L2 - rock magnetism;thermornagnetic curves;irreversibility;thermal alteration;high-temperature variation;low-temperature variation;magnetic susceptibility;ROCKS SO - Physics and Chemistry of the Earth 2002 ;27(25-31):1305-1309 4917 UI - 9840 AU - Bohnel H AU - Molina-Garza R AD - Geoforschungszentrum Potsdam, D-14473 Potsdam, GermanyUNAM, Ctr Geociencias, Queretaro 76230, MexicoBohnel, H, Geoforschungszentrum Potsdam, Telegrafenberg C3, D-14473 Potsdam, Germany TI - Secular variation in Mexico during the last 40,000 years AB - Palcomagnetic data are available for Mexico from various archives, covering irregularly the last 40,000 years. Data obtained from lake sediments are affected by ambiguous conversion of age to depth, and the paleomagnetic data themselves are not of high quality, as samples were only demagnetized at one field intensity. These lake sediment data are therefore considered as less reliable for construction of a secular variation curve, although they may give some qualitative information for the last 25,000 years. Archeological samples provide data for the period, 100-1200 A.D. Their C-14 ages are some times not well constrained, with unrecoverable analytical and statistical procedures, and often ages were only inferred from the stratigraphic position and the paleomagnetic record. The paleomagnetic record of these materials is of high quality with very low internal dispersion, although no magnetic cleaning techniques have been applied. Variations of inclination and declination with time are hampered by large age uncertainties and thus of limited value for the construction of secular variation curves. Paleomagnetic data from an U-Th dated stalagmite provide reasonable directions for most of the last 1200 years, being of lower quality in those parts with very low remanence intensity. The U-Th age determinations were interpreted in terms of a constant growth-rate, which might be only valid as a first-order approximation. Recent volcanic rocks from the Trans-Mexican volcanic belt provide 19 paleomagnetic directions of reasonable to high quality, and often also absolute paleointensities. Ages have been determined from 14C analysis of charcoal or paleosols found below the lavas, and extend over the last similar to40,000 years. Therefore, volcanic rocks provide the most adequate archive for the construction of a secular variation curve, but much more.volcanic structures need to be dated to obtain a semi-continuous secular variation curve. Comparison of the data from different archives is possible mainly for the last 2500 years and despite the aforementioned problems similar variations of declination and inclination are observed. This holds as well when comparing them to data from Holocene volcanic rocks from western North America. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000179096000008 L2 - Mexico;paleomagnetism;secular variation;paleointensity;MAGNETIC-FIELD; DIRECTION; LAVAS; PALEOINTENSITY; CENTURIES; SOUTHWEST; FRANCE SO - Physics of the Earth and Planetary Interiors 2002 ;133(1-4):99-109 4918 UI - 10726 AU - Bojdecki T AU - Gorostiza LG AD - Univ Warsaw, Math Inst, PL-02097 Warsaw, PolandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoCtr Invest & Matemat, AC, MexicoBojdecki, T, Univ Warsaw, Math Inst, Ul Banacha 2, PL-02097 Warsaw, Poland TI - Time-localization of random distributions on Wiener space II: Convergence, fractional Brownian density processes AB - For a random element X of a nuclear space of distributions on Wiener space C([0 1], R-d), the localization problem consists in "projecting" X at each time t is an element of [0, 1] in order to define an S' (R-d)-valued process X = {X(t), t is an element of [0. 1]}, called the time-localization of X. The convergence problem consists in deriving weak convergence of time-localization processes (in C([0 1], S' (R-d)) in this paper) from weak convergence of the corresponding random distributions on C([0, 1], R-d). Partial steps towards the solution of this problem were carried out in previous papers, the tightness having remained unsolved. In this paper we complete the solution of the convergence problem via an extension of the time-localization procedure. As an example, a fluctuation limit of a system of fractional Brownian motions yields a new class of S' (R-d)-valued Gaussian processes, the "fractional Brownian density processes" MH - Mexico|Distrito Federal MH - Poland PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0926-2601 UR - ISI:000176760100002 L2 - random distribution;Wiener space;time-localization;fluctuation limit;fractional Brownian motion;fractional Brownian density process;POISSON SYSTEM; MOTIONS; PARTICLES SO - Potential Analysis 2002 ;17(3):267-291 4919 UI - 11022 AU - Bojdecki T AU - Gorostiza LG AD - CINVESTAV, Dept Math, Mexico City 07000, DF, MexicoUniv Warsaw, Inst Math, PL-02097 Warsaw, PolandGorostiza, LG, CINVESTAV, Dept Math, AP 14-740, Mexico City 07000, DF, Mexico TI - Self-intersection local time for S '(R-d)-Ornstein-Uhlenbeck processes arising from immigration systems AB - Fluctuation limits of an immigration branching particle system and an immigration branching measure-valued process yield different types of S'(R-d)-valued Ornstein-Uhlenbeck processes whose covariances are given in terms of an excessive measure for the underlying motion in R-d, which is taken to be a symmetric alpha-stable process. In this paper we prove existence and path continuity results for the self-intersection local time of these Ornstein-Uhlenbeck processes. The results depend on relationships between the dimension d and the parameter alpha MH - Mexico|Distrito Federal MH - Poland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000175944900004 L2 - self-intersection local time;Ornstein-Uhlenbeck process;tempered distribution;immigration branching system;BRANCHING PARTICLE-SYSTEMS; SUPERPROCESSES SO - Mathematische Nachrichten 2002 ;238():37-61 4920 UI - 10508 AU - Bojorquez-Tapia LA AU - Juarez L AU - Cruz-Bello G AD - Univ Arizona, Sch Renewable Nat Resources, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoInst Nacl Invest Forestales & Agropecuarias, Mexico City 04110, DF, MexicoBojorquez-Tapia, LA, Univ Arizona, Sch Renewable Nat Resources, Biol Sci E,Room 207, Tucson, AZ 85721 USA TI - Integrating fuzzy logic, optimization, and GIS for ecological impact assessments AB - Appraisal of ecological impacts has been problematic because of the behavior of ecological system and the responses of these systems to human intervention are far from fully understood. While it has been relatively easy to itemize the potential ecological impacts, it has been difficult to arrive at accurate predictions of how these impacts affect populations, communities, or ecosystems. Furthermore, the spatial heterogeneity of ecological systems has been overlooked because its examination is practically impossible through matrix techniques, the most commonly used impact assessment approach. Besides, the public has become increasingly aware of the importance of the EIA in decision-making and thus the interpretation of impact significance is complicated further by the different value judgments of stakeholders. Moreover, impact assessments are carried out with a minimum of data, high uncertainty, and poor conceptual understanding. Hence, the evaluation of ecological impacts entails the integration of subjective and often conflicting judgments from a variety of experts and stakeholders. The purpose of this paper is to present an environmental impact assessment approach based on the integration fuzzy logic, geographical information systems and optimization techniques. This approach enables environmental analysts to deal with the intrinsic imprecision and ambiguity associated with the judgments of experts and stakeholders, the description of ecological systems, and the prediction of ecological impacts. The application of this approach is illustrated through an example, which shows how consensus about impact mitigation can be attained within a conflict resolution framework MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0364-152X UR - ISI:000177343600009 L2 - spatial analysis;environmental impact assessment;highways;multicriteria models;mathematical programming;EIA; HIGHWAYS; SETS SO - Environmental Management 2002 ;30(3):418-433 4921 UI - 10880 AU - Bollmann J AU - Cortes MY AU - Haidar AT AU - Brabec B AU - Close A AU - Hofmann R AU - Palma S AU - Tupas L AU - Thierstein HR AD - ETH Zurich, Inst Geol, CH-8092 Zurich, SwitzerlandUABCS, Dept Geol Marina, La Paz 23080, BCS, MexicoAmer Univ Beirut, Dept Geol, Beirut, LebanonSwiss Fed Inst Snow & Avalanche Res, CH-7260 Davos, SwitzerlandUniv So Calif, Wrigley Inst Environm Studies, AHF 232, Los Angeles, CA 90089, USAIPIMAR, Lab Fitoplancton, Dep Ambiente Aquat, P-1449006 Lisbon, PortugalUniv Hawaii Manoa, Div Biol Oceanog, SOEST, Honolulu, HI 96822, USABollmann, J, ETH Zurich, Inst Geol, Sonneggstr 5, CH-8092 Zurich, Switzerland TI - Techniques for quantitative analyses of calcareous marine phytoplankton AB - This paper discusses the techniques used to sample and analyse living marine calcareous phytoplankton. The various methods are described and tested within several research projects aimed at the determination of coccolithophore cell densities in seawater. In addition, the potential advantages and drawbacks associated with the application of light and scanning electron microscopic techniques to the quantitative analysis of coccolithophores are discussed. Several tests have been carried out in order to quantify potential errors related to: (1) homogeneity of material distribution on filter membranes; (2) use of different microscopes (scanning electron microscope versus light microscope); (3) use of different filter membranes (cellulose mixed-ester membranes versus polycarbonate membranes); and (4) Utermohl settling versus filtration method. These tests revealed that major errors in cell density calculations could result from the uneven distribution of coccolithophore specimens on a filter membrane. The error resulting from the use of a light microscope arises from its low resolution, which restricts the identification of species, especially of small coccospheres. The use of different filter membranes does not show a statistically significant difference in cell density calculations, although polycarbonate membranes can be examined much more efficiently with the scanning electron microscopy than cellulose mixed-ester membranes. The Utermohl method, however, gives lower cell densities consistently (several times) than the filtration method. (C) 2002 Elsevier Science B.V. All rights reserved MH - Lebanon MH - Mexico|Baja California Sur MH - Portugal MH - Switzerland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Paleontology U5 - J;Article AV - English IS - 0377-8398 UR - ISI:000176423100004 L2 - microscopy;plankton surveys;plankton collection devices;water filtration;coccolithophores SO - Marine Micropaleontology 2002 ;44(3-4):163-185 4922 UI - 10956 AU - Bonales FG AU - Trigos-Arrieta FJ AU - Mendoza RV AD - Calif State Univ Bakerfield, Dept Math, Bakersfield, CA 93311, USAUniv Michoacana, Escuela Ingn Quim, Morelia 58060, Michoacan, MexicoUniv Michoacana, Escuela Ciencias Fis Matemat, Morelia 58060, Michoacan, MexicoTrigos-Arrieta, FJ, Calif State Univ Bakerfield, Dept Math, 9011 Stockdale Highway, Bakersfield, CA 93311 USA TI - A characterization of Pontryagin-van Kampen duality for locally convex spaces AB - Topological vector spaces (TVSs) are topological Abelian groups when considered under the operation of addition. It is therefore natural to ask when they satisfy Pontryagin-van Kampen (P-vK) duality. In 1984 S. Kye published a characterization of P-vK duality for real locally convex spaces (LCSs). His proof however is incorrect. In this paper we offer an alternative characterization of P-vK duality for real LCSs. We also compare our results with some other contributions and state a number of questions. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000176081400008 L2 - absorbent;barrel;bornological;character;compact;convex;dual;equicontinuity;locally convex space;polar;quasi-complete;reflective;reflexive;topological group;weak topology SO - Topology and Its Applications 2002 ;121(1-2):75-89 4923 UI - 11357 AU - Bonales FG AU - Trigos-Arrieta FJ AU - Mendoza RV AD - Univ Michoacana, Escuela Ingn Quim, Morelia, Michoacan, MexicoCalif State Univ, Dept Math, Bakersfield, CA 93311, USAUniv Michoacana, Escuela Ciencias Fis Matemat, Morelia 58060, Michoacan, MexicoBonales, FG, Univ Michoacana, Escuela Ingn Quim, Morelia, Michoacan, Mexico TI - A characterization of Pontryagin-van Kampen duality for complex locally convex spaces AB - Topological vector spaces (TVS) are topological Abelian groups when considered under the operation of addition. It is therefore natural to ask when they satisfy Pontryagin-van Kampen (P-vK) duality. A number of attempts have been considered for real LCS. In particular, in a previous paper we showed a characterization of (P-vK) duality for real LCS. In this article we show that this characterization also holds for complex spaces MH - Mexico|Michoacan MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000175100400012 SO - Communications in Algebra 2002 ;30(4):1715-1724 4924 UI - 10819 AU - Bonet F AU - Grugeon S AU - Urbina RH AU - Tekaia-Elhsissen K AU - Tarascon JM AD - Sonoma State Univ, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, MexicoUniv Picardie, Lab React & Chim Solides, UPRES A6007, F-80039 Amiens, FranceUrbina, RH, Sonoma State Univ, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, Mexico TI - In situ deposition of silver and palladium nanoparticles prepared by the polyol process, and their performance as catalytic converters of automobile exhaust gases AB - In situ deposition of silver particles onto alumina and palladium particles onto mixed Ce-Zr oxides has been achieved upon chemical reduction of the corresponding metal species (AgNO3 and PdCl2) by ethylene glycol in the presence of polyvinylpyrrolidone. The support oxide powders were found to keep their crystalline structure and morphology after treatment with hot ethylene glycol while the BET surface area decreased after metal deposition. Microprobe maps obtained from energy dispersive X-ray analysis revealed a homogeneous distribution of metal nanoparticles on the surfaces of alumina and of the mixed Ce-Zr oxides. Supported silver and palladium were tested as catalytic converters of simulated exhaust automobile gases. The catalytic activity of silver-loaded alumina powder catalyst for CO and hydrocarbon oxidation as well as NO and NOx reduction, was found to be higher than that of a reference silver catalyst. Palladium-loaded mixed Ce-Zr oxides powder catalyst showed a similar performance to that of a reference palladium catalyst as a three-way catalyst converter. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - France MH - Mexico|Sonora PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 1293-2558 UR - ISI:000176412800014 L2 - silver;palladium;in situ deposition;three-way catalysts;ethylene glycol;REDUCTION; CO; NO; PD SO - Solid State Sciences 2002 ;4(5):665-670 4925 UI - 10643 AU - Bonilla HR AU - Pinon GC AD - Univ Autonoma Baja California, Dept Biol Marina, La Paz 23080, BCS, MexicoUniv Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149, USAEl Colegio Frontera Sur, Dept Ecol Acuat, Chetumal 77000, Q Roo, MexicoBonilla, HR, Univ Autonoma Baja California, Dept Biol Marina, Apartado Postal 19-B, La Paz 23080, BCS, Mexico TI - Influence of temperature and nutrients on species richness of deep water corals from the western coast of the Americas AB - Studies on biogeography of stony corals from the eastern Pacific have been conducted in detail only for reef species, and to date there have been no attempts to explain the differences of regional species richness on the basis of oceanographic conditions. The objective of this work was to determine the relationship between deep-water (> 200 m) scleractinian species richness along the western coast of the Americas, and four oceanographic variables (temperature, nitrates, phosphates and silicates), and the feasibility to use this information to model effects of global warming on those associations. Data on coral distribution were gathered from bibliography and museum collections, while information on oceanographic conditions from 200 to 2000 m depth was obtained from NOAA atlases. Species richness, estimated for intervals of 5 degrees of latitude, was correlated with abiotic factors using the Spearman rank coefficient. In the Northern Hemisphere, total species richness was positively influenced by temperature, but negatively by nutrients. In contrast, there was no effect of those factors on coral diversity in the Southern Hemisphere. At the family level, high temperatures favored species richness of Caryophylliidae and Dendrophylliidae north of the Equator, but diversity was reduced in areas of high concentration of silicates. In the Southern Hemisphere, temperature was not associated with deep-water coral richness, but correlated negatively with diversity of Caryophylliidae. Nutrients also showed an inverse relationship with richness of the latter family. In the rest of the families analyzed, there was no apparent effect of oceanic conditions on species richness in the Southern Hemisphere. The results indicated that richness may be influenced by changes in oceanographic factors (especially temperature and silicate concentration). Then, it is feasible to develop numerical models to predict possible changes in deep-water coral diversity on the basis of scenarios from global warming models MH - Mexico|Baja California Sur MH - Mexico|Quintana Roo MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000176969700006 L2 - azooxanthellate corals;species richness;temperature;nutrients;eastern Pacific;EASTERN PACIFIC; MEXICAN PACIFIC; BIOGEOGRAPHY; SCLERACTINIA; RANGE; OCEAN; SIZE SO - Hydrobiologia 2002 ;471():35-41 4926 UI - 9578 AU - Bonilla J AU - Saldivar E AU - Flores-Tlacuabuac A AU - Vivaldo-Lima E AU - Pfaendner R AU - Tiscareno-Lechuga F AD - Cid, R&D Desc Chem Sector, Lerma 52000, MexicoInst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, MexicoUniv Iberoamer, Dept Ciencias, Mexico City 01210, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, MexicoCiba Spezialitatenchem Lampertheim GmbH, Lampertheim, GermanySaldivar, E, Cid, R&D Desc Chem Sector, Av Los Sauces 87-6, Lerma 52000, Mexico TI - Detailed modeling, simulation, and parameter estimation of nitroxide mediated living free radical polymerization of styrene AB - A kinetic model based on a detailed reaction mechanism for the nitroxide-mediated radical polymerization (NMRP) of styrene is presented. The reaction mechanism includes the following reactions: chemical initiation, reversible nitroxyl ether decomposition, monomer dimerization, thermal initiation, propagation, reversible monomeric and polymeric alkoxyamine formation (production of dormant species), alkoxyamine decomposition, rate enhancement, transfer to monomer and dimer, as well as conventional termination. By simple manipulation of the ODEs initial conditions and tuning of the model by turning on/off the appropriate kinetic steps via their corresponding kinetic rate constants, the model presented here is capable of representing two technologically important variations of nitroxyl mediated polymerization techniques: 1) use of traditional radical initiator together with a nitroxide-type stable radical; and 2) use of a nitroxyl ether or alkoxyamine compound as controller. Model predictions are validated against experimental data provided by Ciba Specialty Chemicals, Inc. Parametric sensitivity analyses and non-linear estimation procedures are used to estimate the unknown kinetic rate constants. The overall agreement between model predictions and experimental data is generally good. The qualitative simulations and the detailed mechanistic discusssions presented here provide deeper insight into some of the aspects of NMRP processes not well understood to date MH - Germany MH - Mexico|Guanajuato MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 1054-3414 UR - ISI:000179778700003 L2 - NMRP;living free-radical polymerization;controlled radical polymerization;THERMAL POLYMERIZATION; KINETICS; MECHANISMS; INITIATOR SO - Polymer Reaction Engineering 2002 ;10(4):227-263 4927 UI - 10614 AU - Borges-Argaez R AU - Pena-Rodriguez LM AU - Waterman PG AD - So Cross Univ, Ctr Phytochem, Lismore, NSW 2480, AustraliaCtr Invest Cientif Yucatan, Grp Quim Organ, Unidad Biotecnol, Merida 97200, Yucatan, MexicoWaterman, PG, So Cross Univ, Ctr Phytochem, POB 157, Lismore, NSW 2480, Australia TI - Flavonoids from two Lonchocarpus species of the Yucatan Peninsula AB - Leaves, stern bark and root of Lonchocarpus xuul and Lonchocarpus yucatanensis were studied separately. A chalcone, 2',4-dimethoxy-6'-hydroxylonchocarpin (1), and the flavones 5,4'-dihydroxy-3'-methoxy-(6:7)-2,2-dimethylpyranoflavone (2) and 5,4'-dimethoxy-(6:7)-2,2-dimethylpyrano-flavone (3), together with the known carpachromene (4), were isolated front the leaves of both species. Similarly, the previously reported flavans xuulanin (5) and 3beta-methoxyxuulanin (6). together with the novel 3beta,4beta,5-trimethoxy-4'-hydroxy-(6:7)-2,2-dimethylpyranoflavan (7), 3-hydroxy-4,5-dimethoxy-(6:7)-2,2-dimethyl-pyranoflavan (8), and 3,4-dihydroxy-5-methoxy-(6:7)-2.2-dimethylpyranoflavan (10), were isolated from the stern bark and root of both species. Finally, the known 2',4'-dihydroxy-3'-(3-methylbut-2-enyl) chalcone (13) was obtained from the root of L. xuul only. The structures of the various metabolites were established by interpretation of their spectroscopic data. (C) 2002 Published by Elsevier Science Ltd MH - Australia MH - Mexico|Yucatan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000177031400014 L2 - Lonchocarpus xuul;Lonchocarpus yucatanensis;leguminosae-papilionoideae;flavonoids;flavan-3,4-diol;flavones;chalcone;STEM SO - Phytochemistry 2002 ;60(5):533-540 4928 UI - 11828 AU - Borgonovi F AU - Celardo G AU - Izrailev FM AU - Casati G AD - Dipartimento Matemat & Fis, I-25121 Brescia, ItalyINFM, I-25121 Brescia, ItalyIst Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoInt Ctr Study Dynam Syst, I-22100 Como, ItalyIst Nazl Fis Nucl, I-22100 Como, ItalyBorgonovi, F, Dipartimento Matemat & Fis, Via Musei 41, I-25121 Brescia, Italy TI - Semiquantal approach to finite systems of interacting particles AB - A novel approach is suggested for the statistical description of quantum systems of interacting particles. We show that the occupation numbers for single-particle states can be represented as a convolution of a classical analog of the eigenstate, with the quantum occupation number for noninteracting particles. The latter takes into account the wave function symmetry and depends on the unperturbed energy spectrum only. As a result, the distribution of occupation numbers n(s) can be found even for a large number of interacting particles. Using the model of interacting spins, we demonstrate that this approach gives a correct description of n(s) even in deep quantum regions with few single-particle orbitals MH - Italy MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000173687500021 L2 - QUANTUM-CLASSICAL CORRESPONDENCE; FERMI SYSTEMS; STATISTICAL-THEORY; COMPOUND STATES; SHELL-MODEL; CHAOS; EIGENFUNCTIONS; THERMALIZATION; LOCALIZATION; DENSITY SO - Physical Review Letters 2002 ;88(5): 4929 UI - 9755 AU - Borissova J AU - Kurtev R AU - Georgiev L AU - Rosado M AU - Ivanov G AD - Bulgarian Acad Sci, Astron Inst, Sofia, Bulgaria. Univ Sofia, Dept Astron, Sofia, Bulgaria. Univ Nacl Autonoma Mexico, Inst Astronoma, Mexico City 04510, DF, Mexico TI - IC1613OBassociations and star cluster candidates AB - Moderately deep ground based UBV images are used to investigate the OB associations and star clusters in IC 1613. Fifty eight OB associations with sizes between 30 and 130 pc are outlined. The iteraction between associations and superbubbles in IC 1613 was analyzed. The lack of star clusters was confirmed MH - Bulgaria MH - Mexico|Distrito Federal T3 - EXTRAGALACTIC STAR CLUSTERSIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBV57N AV - English IS - 0074-1809 UR - ISI:000179397100089 SO - 2002 ;():456-458 4930 UI - 10752 AU - Borovikov WA AU - Mendoza FJ AD - Benemerita Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla, MexicoRussian Acad Sci, Inst Problems Mech, Moscow 117526, RussiaBorovikov, WA, Benemerita Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Apartado Postal 1152, Puebla, Mexico TI - The problem of the pointwise Fourier inversion for piecewise smooth functions of several variables AB - We study the pointwise convergence problem for the inverse Fourier transform of piecewise smooth functions, i.e., whether S-rhoD f(x) --> f(x) as rho --> infinity, rho --> infinity. Here for X, xi is an element of R-n S(rhoD)f(x) = 1/(2pi)(n/2) (rhoD)integral(f) over cap(xi)e(i) dxi. is the partial sum operator using a convex and open set D containing the origin, and rhoD = {rhoxi : xi is an element of D} MH - Mexico|Puebla MH - Russia PB - CAMBRIDGE: BIRKHAUSER BOSTON INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1069-5869 UR - ISI:000176749400004 L2 - Fourier transform;Legendre transform;asymptotic behavior SO - Journal of Fourier Analysis and Applications 2002 ;8(4):399-406 4931 UI - 7058 AU - Borrega MBM AU - Cuevas M AU - Sanchez C AU - de la Hoz B AD - Dept Allergy, Guadalajara, Jalisco, MexicoHosp Ramon y Cajal, Dept Immunol, E-28034 Madrid, SpainHosp Ramon y Cajal, Dept Allergy, E-28034 Madrid, Spain TI - Patterns of legume hypersensitivity MH - Mexico|Jalisco MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Allergy;Immunology U5 - J;Meeting Abstract AV - English IS - 0105-4538 UR - ISI:000186177500278 SO - Allergy 2002 ;57():98-99 4932 UI - 10509 AU - Bosch C AU - Kucera J AD - Washington State Univ, Dept Math, Pullman, WA 99164, USADept Matemat ITAM, Mexico City 01000, DF, MexicoBosch, C, Washington State Univ, Dept Math, Pullman, WA 99164, USA TI - Sequential completeness and regularity of inductive limits of webbed spaces AB - Any inductive limit of bornivorously webbed spaces is sequentially complete if it is regular MH - Mexico|Distrito Federal MH - USA PB - PRAGUE 1: CZECHOSLOVAK MATHEMATICAL JOURNAL RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0011-4642 UR - ISI:000177351900008 L2 - localy convex space;webbed space;sequential completeness;regularity of an inductive limit SO - Czechoslovak Mathematical Journal 2002 ;52(2):329-332 4933 UI - 11833 AU - Bosch G AU - Terlevich E AU - Terlevich R AD - Univ Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla, MexicoBosch, G, Fac Ciencias Astron, La Plata, Argentina TI - Narrow-band CCD photometry of giant HII regions AB - We have obtained accurate CCD narrow-band Hbeta and Halpha photometry of giant H II regions (GEHRs) in M33, NGC 6822 and M101. Comparison with previous determinations of emission-line fluxes shows large discrepancies; their probable origins are discussed. Combining our new photometric data with global velocity dispersion (sigma) derived from emission linewidths, we review the L(HG)-sigma relation. A re-analysis of the properties of the GEHRs included in our sample shows that age spread and the superposition of components in multiple regions introduce a considerable spread in the regression. Combining the information available in the literature regarding ages of the associated clusters, evolutionary footprints on the interstellar medium, and kinematical properties of the knots that build up the multiple GEHRs, we find that a subsample-which we refer to as young and single GEHRs-do follow a tight relation in the L-sigma plane MH - Argentina MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000173652100001 L2 - HII regions;galaxies : individual : NGC 6822;galaxies : individual : M33 galaxies : individual : M101 HII;galaxies : star clusters;H-II-REGIONS; HUBBLE-SPACE-TELESCOPE; EXTRAGALACTIC DISTANCE SCALE; INITIAL MASS FUNCTION; DEEP FIELD; CHEMICAL-COMPOSITION; PHYSICAL CONDITIONS; KEY PROJECT; GALAXIES; NGC-604 SO - Monthly Notices of the Royal Astronomical Society 2002 ;329(3):481-496 4934 UI - 11047 AU - Bose P AU - Hurtado-Diaz F AU - Omana-Pulido E AU - Snoeyink J AU - Toussaint GT AD - Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaUniv Politecn Catalunya, Dept Matemat 2, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Dept Matemat, Mexico City 04510, DF, MexicoUniv N Carolina, Dept Comp Sci, Chapel Hill, NC 27599, USAMcGill Univ, Sch Comp Sci, Montreal, PQ H3A 2A7, CanadaBose, P, Carleton Univ, Sch Comp Sci, Herberg Room 5302, Ottawa, ON K1S 5B6, Canada TI - Some aperture-angle optimization problems AB - Lot P and Q be two disjoint convex polygons in the plane with in and n vertices, respectively. Given a point x in P, the aperture angle of x with respect to Q is defined as the angle of the cone that: (1) contains Q, (2) has apex at x and (3) has its two rays emanating from x tangent to Q. We present algorithms with complexities O(n log m), O(n + n log(m/n)) and O(n + m) for computing the maximum aperture angle with respect to Q when x is allowed to vary in P. To compute the minimum aperture angle we modify the latter algorithm obtaining an O(n + m) algorithm, Finally, we establish an Omega(n + n log(m/n)) time lower bound for the maximization problem and an Omega(m + n) bound for the minimization problem thereby proving the optimality of our algorithms MH - Canada MH - Mexico|Distrito Federal MH - Spain MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0178-4617 UR - ISI:000175993200001 L2 - aperture angle;convexity;unimodality;discrete optimization;algorithms;complexity;computational geometry;robotics;visibility;INTERSECTION SO - Algorithmica 2002 ;33(4):411-435 4935 UI - 11848 AU - Bosseno MF AU - Barnabe C AU - Gastelum EM AU - Kasten FL AU - Ramsey J AU - Espinoza B AU - Breniere SF AD - IRD, UR Pathogenie Trypanosomatides 008, F-34032 Montpellier 1, FranceIRD, CNRS, UMR 9926, F-34032 Montpellier, FranceUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Guadalajara, Ctr Univ Ciencias Salud, Dept Salud Publ, Guadalajara 44430, Jalisco, MexicoNatl Inst Publ Hlth, Ctr Infect Dis Res, Cuernavaca 62508, Morelos, MexicoBosseno, MF, IRD, UR Pathogenie Trypanosomatides 008, 911 Av Agropolis,BP 5045, F-34032 Montpellier 1, France TI - Predominance of Trypanosoma cruzi lineage I in Mexico AB - Randomly amplified polymorphic DNA (RAPD) has emerged as an effective genetic marker for analysis of Trypanosoma cruzi population variability. This method has been used to study the genetic variability of Mexican T. cruzi stocks and to relate these results to previous classifications. High clonal diversity was observed among the Mexican populations: 24 RAPD types were scored among 56 stocks analyzed. Only two stocks (3.6%) belonged to the T. cruzi II lineage, while all others belonged to T. cruzzi I. The robustness of these clusters was statistically highly significant. Mexican T. cruzi I stocks formed a homogeneous group with reduced genetic distances among its members. Parasites from this group were isolated from both domestic and sylvatic cycles over a broad geographic area in Mexico. The two Mexican stocks classified as T. cruzi II (isolated from sylvatic cycles) were of the same RAPD type, although they were not closely related to the three reference T. cruzi II stocks circulating in domestic cycles in Argentina, Brazil, Bolivia, and Chile. These stocks were also unrelated to the formerly named Zymodeme III MH - France MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000173731900047 L2 - MULTILOCUS ENZYME ELECTROPHORESIS; PHYLOGENETIC LINEAGES; CLONAL EVOLUTION; CHAGAS-DISEASE; DNA; IDENTIFICATION; POPULATIONS; DIVERSITY; STOCKS; IMPACT SO - Journal of Clinical Microbiology 2002 ;40(2):627-632 4936 UI - 9391 AU - Boucard CGV AU - Levy P AU - Ceccaldi HJ AU - Brogren CH AD - CIBNOR, Dept Marine Aquaculture, La Paz 23000, BCS, MexicoIFREMER, Pacific Oceanol Ctr Tahiti, Taravao, Fr PolynesiaFac Sci & Tech St Jerome, CERAM, F-13397 Marseille, FranceInst Food Safety & Toxicol, Div Microbiol Safety, Soborg, DenmarkBoucard, CGV, CIBNOR, Dept Marine Aquaculture, POB 128, La Paz 23000, BCS, Mexico TI - Developmental changes in concentrations of vitellin, vitellogenin, and lipids in hemolymph, hepatopancreas, and ovaries from different ovarian stages of Indian white prawn Fenneropenaeus indicus AB - The objective of the present study was to characterize the relationship between vitellogenin (Vtg) and vitellin (Vt) concentration profiles during the reproductive cycle of the penaeid prawn Fenneropenaeus indicus. Vt was purified from ovaries of vitellogenic females by gradient ultracentrifugation. Purified Vt was used to raise polyclonal antibodies (anti-Vt) for this species. Vtg and Vt concentrations in hemolymph, hepatopancreas, and ovaries were measured by validated enzyme-linked immunosorbent assay (ELISA). Parallel displacement curves were obtained between purified Vt and tissues from ovaries, hepatopancreas, and hemolymph. Vtg concentrations increased in the hemolymph and hepatopancreas in the early stages of ovarian development (until GSI 3.4) and decreased significantly (P < 0.05) in the advanced maturation stages (GSI 3.4-7.1). In spite of the lower concentration of Vtg in hepatopancreas, accumulation of Vt in the ovaries was increasingly greater during oogenesis. These results indicate that the contribution of Vtg synthesized by the hepatopancreas is not sufficient for adequate development of oocytes in the female prawn F. indicus during vitellogenesis. (C) 2002 Elsevier Science B.V. All rights reserved MH - Denmark MH - Fr Polynesia MH - France MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000180421300005 L2 - vitellogenesis;vitellogenin;vitellin;total lipids;penaeidae;shrimp;PENAEUS-JAPONICUS; MATURE OVARIES; KURUMA PRAWN; PURIFICATION; SHRIMP; CRUSTACEAN; PENAEIDAE; DECAPODA; VANNAMEI; MONODON SO - Journal of Experimental Marine Biology and Ecology 2002 ;281(1-2):63-75 4937 UI - 10968 AU - Bouckenooghe AR AU - Jiang ZD AU - de la Cabada FJ AU - Ericsson CD AU - Dupont HL AD - Sch Publ Hlth, Houston, TX, USAUniv Texas, Sch Med, Houston, TX, USASt Lukes Episcopal Hosp, Baylor Coll Med, Houston, TX 77030, USAHosp Occidente Guadalajara, Guadalajara, Jalisco, MexicoVet Affairs Med Ctr, Houston, TX 77030, USABouckenooghe, AR, Vet Affairs Med Ctr, 2002 Holcombe Blvd,111 PC, Houston, TX 77030 USA TI - Enterotoxigenic Escherichia coli as cause of diarrhea among Mexican adults and US travelers in Mexico AB - Background: Enterotoxigenic Escherichia coli(ETEC) is the most common pathogen identified in travelers to Mexico with diarrhea. There have been few recent studies looking at the etiology of diarrhea in travelers compared with the local resident population. Methods:We compared enteric pathogens isolated in two populations experiencing acute diarrhea acquired in Guadalajara, Mexico and also compared clinical illness caused by the principal pathogen, ETEC. Results: A single and 2 enteropathogens were detected in 107 (23%) and 8 (2%), respectively, of 457 Mexicans in 1995 and 1997, and 37 (29%) and 2 (2%), respectively, of 127 US adults in 1997. The most common pathogen was ETEC in both groups (11% of Mexican, 19% of US adults), although more common in the US travelers group (p = .0017). Shigella spp and Cryptosporidium spp were less common in the Mexican (<1% and <1%, respectively) than in the travelers group (6% and 3%, respectively) (p < .001 and p = .002, respectively). Entamoeba histolytica was more often found in the Mexican group (4% Mexican, 0% US adults; p = .027). Conclusion: ETEC is the most common pathogen among travelers and Mexican residents in this study. The duration of untreated diarrhea due to ETEC was significantly shorter among Mexicans (49 hours in Mexican, 94 hours in US adults; p = .0004), as was the average number of unformed stools passed over 4 days (Mexicans 8.8 versus travelers 17.9 stools; p = .0009) MH - Mexico|Jalisco MH - USA PB - HAMILTON: B C DECKER INC RP - NOT IN FILE U3 - TC 9 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 1195-1982 UR - ISI:000176077000005 L2 - ENTERIC PATHOGENS; UNITED-STATES; CHILDREN; STUDENTS SO - Journal of Travel Medicine 2002 ;9(3):137-140 4938 UI - 10675 AU - Boyer D AU - Vinals J AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoDonald Danforth Plant Sci Ctr, Lab Computat Genom, St Louis, MO 63132, USABoyer, D, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Weakly nonlinear theory of grain boundary motion in patterns with crystalline symmetry AB - We study the motion of a grain boundary separating two otherwise stationary domains of hexagonal symmetry. Starting from an order parameter equation, a multiple scale analysis leads to an analytical equation of motion for the boundary that shares many properties with that of a crystalline solid. We find that defect motion is generically opposed by a pinning force that arises from nonadiabatic corrections to the standard amplitude equations. The magnitude of this force depends sharply on the misorientation angle between adjacent domains: the most easily pinned grain boundaries are those with a low angle (typically 4degreesless than or equal tothetaless than or equal to8degrees) . Although pinning effects may be small, they can be orders of magnitude larger than those present in smectic phases MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000176907500021 L2 - CONVECTION SO - Physical Review Letters 2002 ;89(5): 4939 UI - 11317 AU - Boyer D AU - Vinals J AD - Florida State Univ, Sch Computat Sci & Informat Technol, Tallahassee, FL 32306, USADonald Danforth Plant Sci Ctr, Lab Computat Genom, St Louis, MO, USABoyer, D, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Grain boundary pinning and glassy dynamics in stripe phases AB - We study numerically and analytically the coarsening of stripe phases in two spatial dimensions, and show that transient configurations do not achieve long ranged orientational order but rather evolve into glassy configurations with very slow dynamics. In the absence of thermal fluctuations, defects such as grain boundaries become pinned in an effective periodic potential that is induced by the underlying periodicity of the stripe pattern itself. Pinning arises without quenched disorder from the nonadiabatic coupling between the slowly varying envelope of the order parameter around a defect, and its fast variation over the stripe wavelength. The characteristic size of ordered domains asymptotes to a finite value R(g)similar tolambda(0)epsilon(-1/2)exp(parallel toaparallel to/rootepsilon), where epsilonmuch less than1 is the dimensionless distance away from threshold, lambda(0) the stripe wavelength, and a a constant of order unity. Random fluctuations allow defect motion to resume until a new characteristic scale is reached, function of the intensity of the fluctuations. We finally discuss the relationship between defect pinning and the coarsening laws obtained in the intermediate time regime MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000175146500038 L2 - SWIFT-HOHENBERG EQUATION; NEMATIC LIQUID-CRYSTALS; HYDRODYNAMIC FLUCTUATIONS; COMPETING INTERACTIONS; SCALING BEHAVIOR; SYSTEMS; CONVECTION; EQUILIBRIUM; PATTERNS; KINETICS SO - Physical Review e 2002 ;65(4): 4940 UI - 11989 AU - Bozzolo GH AU - Noebe RD AU - Amador C AD - Ohio Aerosp Inst, Cleveland, OH 44142, USANASA, Glenn Res Ctr, Cleveland, OH 44135, USAUniv Nacl Autonoma Mexico, Dept Fis & Quim Teor, Fac Quim, Mexico City 04510, DF, MexicoBozzolo, GH, Ohio Aerosp Inst, 22800 Cedar Point Rd, Cleveland, OH 44142 USA TI - Site occupancy of ternary additions to B2 alloys AB - In this broad-based survey study, the substitutional site preference of ternary alloying additions to B2 compounds (stable at room temperature and 50/50 composition) is determined using the Bozzolo-Ferrante-Smith (BFS) method for alloys. The method is applied to Ni, Al, Ti, Cr, Cu, Co, Fe, Ta, Hf, Mo, Nb, W, V and Ru additions to NiAl, FeAl, CoAl, CoFe, CoHf, CoTi, FeTi, RuAl, RuSi, RuHf, RuTi, and RuZr. The results arc compared, when available, to experimental data and other theoretical results. (C) 2002 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0966-9795 UR - ISI:000173286000004 L2 - nickel aluminides, based on NiAl;iron aluminides, based on FeAL;site occupancy;INTERMETALLIC COMPOUNDS; FE; DISTRIBUTIONS; ALUMINIDES; OCCUPATION; PREFERENCE; SYSTEMS; METALS; IRON; TI SO - Intermetallics 2002 ;10(2):149-159 4941 UI - 11201 AU - Brackett WW AD - Univ Puebla, Puebla, MexicoBrackett, WW, Univ Nebraska, Med Ctr, Coll Dent, Lincoln, NE 68583, USA TI - One-year clinical performance of a resin-modified glass ionomer and a resin composite restorative material in unprepared Class V restorations (vol 2, pg 27, 2002) MH - Mexico|Puebla MH - USA PB - INDIANAPOLIS: OPERATIVE DENTISTRY INC RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Correction AV - English IS - 0361-7734 UR - ISI:000175416800025 SO - Operative Dentistry 2002 ;27(3):316-316 4942 UI - 9349 AU - Bramon A AU - Escribano R AU - Lucio JL AU - Napsuciale M AU - Pancheri G AD - Univ Autonoma Barcelona, Fis Teor Grp, Bellaterra 08193, Barcelona, SpainUniv Autonoma Barcelona, IFAE, Bellaterra 08193, Barcelona, SpainUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyBramon, A, Univ Autonoma Barcelona, Fis Teor Grp, Bellaterra 08193, Barcelona, Spain TI - Scalar f(0)(980) and sigma(500) meson exchange in phi decays into pi(0)pi(0)gamma AB - The complementarity between chiral perturbation theory and the linear sigma model is exploited to study pi(0)pi(0) production in phi radiative decays, where the effects of the f(0)(980) scalar resonance, and those of its more controversial sigma(500) partner, should become manifest via the phi --> K+K-(gamma) --> pi(0)pi(0)gamma decay chain. The recently reported data on phi --> pi0pi0gamma coming from the VEPP-2M e(+)e(-) collider in Novosibirsk and the DAONE phi-factory in Frascati can be reasonably described in our approach, which we propose as a promising first step towards more detailed analyses. The f(0)(980) contribution, which appears as a moderately narrow peak at the high part of the dipion mass spectrum, can be interpreted as the isoscalar member of the scalar nonet with a large f(0)KK coupling and an f(0)pipi coupling suppressed by almost ideal sigma-f(0) mixing. Indeed, the mixing angle in the flavor basis is found to be phi(S) approximate to -6degrees, if the f(0) propagator is approximated by a simple Breit-Wigner expression, or phi(S) approximate to -9degrees, if an improved two-channel analysis is performed. The sigma(500) resonance, which is then strongly coupled to pion pairs, yields a tiny contribution because, in our approach, its coupling to kaon pairs is proportional to m(sigma)(2) - m(K)(2) and thus quite small MH - Italy MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 17 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000180596200010 L2 - -> PI(-)PI(+)PI(+) DECAY; MULTI-QUARK HADRONS; RADIATIVE DECAY; KAPPA(900); STATES SO - European Physical Journal C 2002 ;26(2):253-260 4943 UI - 8533 AU - Brandao CE AU - Perez-Gomez R AU - Pessoa MG AU - Olivera-Martinez MA AU - Caramori C AU - Bazan-Perez CV AU - Patelli M AU - Torres-Ibarra R AU - Barone A AU - hesa-Violante M AU - Carrilho F AU - Vivar R AU - Tatsch F AD - Graffee & Guinle Hosp, Gaffree, BrazilCivil Hosp Guadalajara, Guadalajara, Jalisco, MexicoEmilio Ribas Infect Dis Hosp, Sao Paulo, BrazilNatl Inst Med Sci & Nutr, Mexico City, DF, MexicoUniv Estadual Paulista Julio Mesquita Filho, Botucatu, SP, BrazilTijuana Gen Hosp, Tijuana, MexicoPUCAMP, Sao Paulo, BrazilInfect Dis Hosp, Guadalajara, Jalisco, MexicoUniv Sao Paulo, BR-05508 Sao Paulo, BrazilNatl Med Ctr, Mexico City, DF, MexicoRoche Mexico, Mexico City, DF, MexicoF Hoffmann La Roche & Co Ltd, Sao Paulo, Brazil TI - Prospective evaluation of early virological response associated with peginterferon alfa-2a (40KD) (Pegasys (R)) and ribavirin from a phase IV, randomized study examining the effects of treatment duration-in hepatitis C patients infected with genotype 1 MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Baja California PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000178301700787 SO - Hepatology 2002 ;36(4):364A-364A 4944 UI - 12011 AU - Brasselet JP AU - Lehmann D AU - Seade J AU - Suwa T AD - CNRS, UPR 9016, Inst Math Luminy, F-13288 Marseille 9, FranceUniv Montpellier 2, Dept Math Sci, F-34095 Montpellier, FranceUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoHokkaido Univ, Dept Math, Sapporo, Hokkaido 0600810, JapanBrasselet, JP, CNRS, UPR 9016, Inst Math Luminy, Campus Luminy,Case 907, F-13288 Marseille 9, France TI - Milnor classes of local complete intersections AB - Let V be a compact local complete intersection defined as the zero set of a section of a holomorphic vector bundle over the ambient space. For each connected component S of the singular set Sing(V) of V, we define the Milnor class mu(*) (V, S) in the homology of S. The difference between the Schwartz-MacPherson class and the Fulton-Johnson class of V is shown to be equal to the sum of mu(*) (V, S) over the connected components S of Sing(V). This is done by proving Poincare-Hopf type theorems for these classes with respect to suitable tangent frames. The 0-degree component mu(0)(V, S) coincides with the Milnor numbers already defined by various authors in particular situations. We also give an explicit formula for mu(*) (V, S) when S is a non-singular component and V satisfies the Whitney condition along S MH - France MH - Japan MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000173206100004 L2 - HOLOMORPHIC FLOW; CHERN CLASSES; HYPERSURFACES; FORMULA; INDEX SO - Transactions of the American Mathematical Society 2002 ;354(4):1351-1371 4945 UI - 9907 AU - Bratychak M AU - Brostow W AU - Castano VM AU - Donchak V AU - Gargai H AD - Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USALvivska Polytech Natl Univ, Dept Petr Chem & Technol, UA-79013 Lvov, UkraineUNAM, CFATA, Queretaro 760000, Qro, MexicoLvivska Polytech Natl Univ, Dept Organ Technol, UA-79013 Lvov, UkraineBrostow, W, Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USA TI - Crosslinking agents of unsaturated polymers: evaluation of the agent efficiency AB - We have performed a comparison of efficacy of several curing agents. We have synthesized curing agents with C=C-bonds of allylic, acrylic or peroxide group type, as derivatives of pyromellitic acid: diallylic ester (I), tetraallylic ester (II), di-(2-methacryloyloxy-ethyl)-pyromellitate (III), tetra-(2-methacryloyloxy-ethyl)pyromellitate (IV), ditert-butylperoxypyromellitate (V) and tetratert-butylperoxypyromellitate (VI). The possibility to use these agents for curing an unsaturated film-forming copolymer which contains polybutadiene fragments was investigated. The unsaturated curing agents (I-IV) are able to form crosslinked copolymers in the presence of peroxide initiators such as benzoyl peroxide. The gelation process orders as well as the values of the effective activation energies for all curing agents studied have been determined. In the presence of curing agents of methacrylic type (III-IV) the crosslinking proceeds more rapidly than in the presence of allylic esters. Unsaturated curing agents containing carboxylic groups (I, III) promote faster formation of three-dimensional structures than tetra- substituted derivatives of pyromellitic acid. For curing agents of the peroxide type the inverse relation is observed. The hardness of films obtained using carboxylic curing agents is higher than for noncarboxylic ones. Films obtained in the presence of unsaturated curing agents exhibit higher hardness than those obtained in the presence of peroxide agents MH - Mexico|Queretaro MH - Ukraine MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1432-8917 UR - ISI:000179036500002 L2 - unsaturated polymers;curing agents;cross-linking;EPOXY-RESINS; PEROXY DERIVATIVES; CROSS-LINKING; POLYMERIZATION; KINETICS; SYSTEMS SO - Materials Research Innovations 2002 ;6(4):153-159 4946 UI - 9108 AU - Bredice FO AU - Orzi DJO AU - Schinca D AU - Sobral H AU - Villagran-Muniz M AD - Ctr Invest Opt, RA-1900 La Plata, ArgentinaUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Lab Fotofis, Mexico City 04510, DF, MexicoBredice, FO, Ctr Invest Opt, RA-1900 La Plata, Argentina TI - Characterization of pulsed laser generated plasma through its perturbation in an electric field AB - The perturbation produced by pulsed laser generated discharge in an electric field is studied as a tool for breakdown characterization. A focused high-power pulsed laser induces a discharge in air or in a solid target, that is placed between the plates of a planar charged capacitor. The induced discharge generates a temporal redistribution of the electrical charges on the plates that can be easily measured by a resistor connected to the ground plate. This signal depends on the energy used to generate the breakdown, the capacitor applied voltage, and the distance between the plates. In this work, we show that this signal can be readily used to optimize the relevant parameters involved in laser-induced breakdown spectroscopy in gases and in solid targets MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0093-3813 UR - ISI:000181103800009 L2 - laser ablation;laser-induced breakdown;plasma diagnostic techniques;SPECTROSCOPY SO - Ieee Transactions on Plasma Science 2002 ;30(6):2139-2143 4947 UI - 10481 AU - Brehm K AU - Hubert K AU - Sciutto E AU - Garate T AU - Frosch M AD - Univ Wurzburg, Inst Hyg & Mikrobiol, D-97080 Wurzburg, GermanyUniv Autonoma Mexico, Inst Invest Biomed, Mexico City, DF, MexicoInst Salud Carlos III, Minist Sanidad & Consumo, CNM, E-28220 Madrid, SpainBrehm, K, Univ Wurzburg, Inst Hyg & Mikrobiol, Josef Schneider Str 2, D-97080 Wurzburg, Germany TI - Characterization of a spliced leader gene and of trans-spliced mRNAs from Taenia solium MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Parasitology U5 - J;Article AV - English IS - 0166-6851 UR - ISI:000177290900012 L2 - Taenia;Echinococcus;spliced leader;trans-splicing;cDNA library;MESSENGER-RNAS; SCHISTOSOMA-MANSONI; ECHINOCOCCUS-MULTILOCULARIS; HUMAN PARASITE; SEQUENCE; SAGINATA; ANTIGENS; PROTEIN; CYSTICERCOSIS; DIVERSITY SO - Molecular and Biochemical Parasitology 2002 ;122(1):105-110 4948 UI - 11552 AU - Brevik I AU - Odintsov SD AD - Norwegian Univ Sci & Technol, Div Appl Mech, N-7491 Trondheim, NorwayUniv Guanajuato, Inst Fis, Leon, Gto, MexicoBrevik, I, Norwegian Univ Sci & Technol, Div Appl Mech, N-7491 Trondheim, Norway TI - Cardy-Verlinde entropy formula in viscous cosmology AB - The results of a paper by Verlinde (hep-th/0008140), discussing the holographic principle in a radiation dominated universe, are extended when allowing the cosmic fluid to possess a bulk viscosity. This corresponds to a nonconformally invariant theory. The generalization of the Cardy-Verlinde entropy formula to the case of a viscous universe seems from a formal point of view to be possible, although we question on physical grounds some elements of this kind of theory, especially the manner in which the Casimir energy is evaluated. Our discussion suggests that for nonconformally invariant theories the holographic definition of Casimir energy should be modified MH - Mexico|Guanajuato MH - Norway PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000174548100110 L2 - CONFORMALLY INVARIANT THEORIES; SCREENING HAWKING ATMOSPHERE; ADS BLACK-HOLES; OPERATOR CONTENT; BRANE COSMOLOGY; HOLOGRAPHY; BOUNDS; VISCOSITY; ENERGY; BALL SO - Physical Review D 2002 ;65(6): 4949 UI - 11341 AU - Briceno RD AU - Eberhard WG AU - Vilardi JC AU - Liedo P AU - Shelly TE AD - Univ Costa Rica, Escuela Biol, San Jose, Costa RicaSmithsonian Trop Res Inst, Balboa, PanamaUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, Lab Genet Poblac, RA-1428 Buenos Aires, DF, ArgentinaColegio Frontera Sur, Tapachula, Chiapas, MexicoUSDA ARS, Honolulu, HI 96804, USABriceno, RD, Univ Costa Rica, Escuela Biol, Ciudad Univ, San Jose, Costa Rica TI - Variation in the intermittent buzzing songs of male medflies (Diptera : Tephritidae) associated with geography, mass-rearing, and courtship success AB - Many aspects of the temporal pattern of sounds produced during the intermittent buzzing displays of pre-copulatory courtship by male medflies varied between wild flies from Costa Rica, Argentina, and Hawaii, and between mass-reared flies from Costa Rica, Argentina, Mexico, and Hawaii. There were no consistent differences when mass-reared strains were compared with the wild strains from the area where they originated in Costa Rica, Argentina and Hawaii. Buzzing sounds produced prior to successful mounting attempts did not differ consistently from those preceding unsuccessful mounts in flies from Costa Rica and Argentina. In strains from all sites, however, courtships in which buzzes were interrupted were more likely not to result in mounting of the female. There was a weak tendency for interruptions to be more common in mass-reared strains MH - Argentina MH - Costa Rica MH - Mexico|Chiapas MH - Panama MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000175200200003 L2 - courtship sounds;medfly;geographic differences;FRUIT-FLY; DROSOPHILA; CHARACTERS SO - Florida Entomologist 2002 ;85(1):32-40 4950 UI - 10366 AU - Brito-Arias M AU - Duran-Paramo E AU - Mata I AU - Molins E AD - CSIC, Inst Ciencia Mat Barcelona, Ballaterra 08193, SpainIPN, Unidad Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoMata, I, CSIC, Inst Ciencia Mat Barcelona, Campus UAB, Ballaterra 08193, Spain TI - A comparative analysis of mono- and disaccharide benzyl fucopyranosides AB - The syntheses and X-ray analyses of two fucopyranosides, the monosaccharide benzyl 3,4-di-O-acetyl-2-hydroxy-beta-D-fucopyranoside, C17H22O7, and the disaccharide 1-benzyl O-(2,3-di-O-acetyl-4,6-O-benzylidene-beta-D-glucopyranosyl)-(1 --> 2)3,4-O-isopropylidene-beta-D-fucopyranoside, C33H40O12, are described. The different substituents induce small conformational changes on the fucopyranoside ring. However, the conformation of the benzyl group varies from (+)gauche for the monosaccharide to synperiplanar for the disaccharide MH - Mexico|Distrito Federal MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 1 U4 - Crystallography U5 - J;Article AV - English IS - 0108-2701 UR - ISI:000177737600019 SO - Acta Crystallographica Section C-Crystal Structure Communications 2002 ;58():O537-O539 4951 UI - 9425 AU - Brody CD AU - Hernandez A AU - Zainos A AU - Lemus L AU - Romo R AD - Cold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City, DF, MexicoBrody, CD, Cold Spring Harbor Lab, 1 Bungtown Rd, Cold Spring Harbor, NY 11724 USA TI - Analysing neuronal correlates of the comparison of two sequentially presented sensory stimuli AB - In a typical sequential sensory discrimination task, subjects are required to make a decision based on comparing a sensory stimulus against the memory trace left by a previous stimulus. What is the neuronal substrate for such comparisons and the resulting decisions? This question was studied by recording neuronal responses in a variety of cortical areas of awake monkeys (Macaca mulatta), trained to carry out a vibrotactile sequential discrimination task. We describe methods to analyse responses obtained during the comparison and decision phases of the task, and describe the resulting findings from recordings in secondary somatosensory cortical area (S2). A subset of neurons in S2 become highly correlated with the monkey's decision in the task MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 4 U4 - Biology U5 - J;Article AV - English IS - 0962-8436 UR - ISI:000180221000018 L2 - decisions;somatosensory cortex;sequential discrimination;2ND SOMATOSENSORY CORTEX; PERCEPTUAL DECISION; MONKEYS; DISCRIMINATION; MECHANISMS; FREQUENCY; SERIAL; TOUCH; FORM SO - Philosophical Transactions of the Royal Society of London Series B-Biological Sciences 2002 ;357(1428):1843-1850 4952 UI - 11228 AU - Brom S AU - Girard L AU - Garcia-de los Santos A AU - Sanjuan-Pinilla JM AU - Olivares J AU - Sanjuan J AD - UNAM, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca, Morelos, MexicoCSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, E-18008 Granada, SpainBrom, S, UNAM, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Ap P 565-A, Cuernavaca, Morelos, Mexico TI - Conservation of plasmid-encoded traits among bean-nodulating Rhizobium species AB - Rhizobium etli type strain CFN42 contains six plasmids. We analyzed the distribution of genetic markers from some of these plasmids in bean-nodulating strains belonging to different species (Rhizobium etli, Rhizobium gallicum, Rhizobium giardinii, Rhizobium leguminosarum, and Sinorhizobium fredii). Our results indicate that independent of geographic origin, R. etli strains usually share not only the pSym plasmid but also other plasmids containing symbiosis-related genes, with a similar organization. In contrast, strains belonging to other bean-nodulating species seem to have acquired only the pSym plasmid from R. etli MH - Mexico|Morelos MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 14 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000175407300059 L2 - PHASEOLUS-VULGARIS L; LEGUMINOSARUM BIOVAR PHASEOLI; SYMBIOTIC PLASMID; ETLI; PERFORMANCE; TRANSPOSON; REPLICONS; NODULES; REGION; GENES SO - Applied and Environmental Microbiology 2002 ;68(5):2555-2561 4953 UI - 11135 AU - Broom JE AU - Nelson WA AU - Yarish C AU - Jones WA AU - Rosas RA AU - Rosas LEA AD - Univ Otago, Dept Biochem, Dunedin, New ZealandMuseum New Zealand Te Papa Tongarewa, Wellington, New ZealandUniv Connecticut, Dept Ecol & Evolutionary Biol, Stamford, CT 06901, USAUniv Autonoma Baja Calif, Fac Ciencias Marinas, Ensenada, Baja California, MexicoUniv Autonoma Baja California, Inst Invest Oceanolog, Ensenada, Baja California, MexicoBroom, JE, Univ Otago, Dept Biochem, POB56, Dunedin, New Zealand TI - A reassessment of the taxonomic status of Porphyra suborbiculata, Porphyra carolinensis and Porphyra lilliputiana (Bangiales, Rhodophyta) based on molecular and morphological data AB - We examined three species of diminutive Porphyra, Porphyra suborbiculata Kjellman from the North Pacific, Porphyra lilliputiana W. A. Nelson, G. A. Knight et M, W. Hawkes from the South Pacific, and Porphyra carolinensis Coll et J. Cox from the western North Atlantic. These taxa were compared in terms of morphology, habitat data and sequence haplotypes of nuclear small subunit rDNA (SSU) and internal transcribed spacers of the nuclear rDNA cistron (ITS). These three species have similar morphologies and growth habits, and share very similar type descriptions and habitat records. Haplotype variation was found within the 11 samples of P. lilliputiana we examined and within P. suborbiculata samples from two locations. but the single P. carolinoisis haplotype (from collections from two separate locations) was identical to one found in several widespread P. lilliputiana samples. Unrooted phylogenetic trees based on sequence data do not support any of the three species as being a monophyletic group, We conclude that these three taxa represent a single species with the oldest name P. suborbiculata having nomenclatural priority. It is likely that P. suborbiculata has recently been introduced to the western Atlantic from the Pacific region MH - Mexico|Baja California MH - New Zealand MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0967-0262 UR - ISI:000175696400009 L2 - 18S rDNA;Bangiaceae;Group I intron;ITS;New Zealand;Porphyra carolinensis;P. lilliputiana;P. suborbiculata;red algae;Rhodophyta;nuclear SSU;systematics;RIBOSOMAL-RNA GENE; NUCLEAR; RDNA; AMPLIFICATION; SEQUENCES SO - European Journal of Phycology 2002 ;37(2):227-235 4954 UI - 10660 AU - Brosius JW AU - Landi E AU - Cook JW AU - Newmark JS AU - Gopalswamy N AU - Lara A AD - NASA, Goddard Space Flight Ctr, Catholic Univ, Greenbelt, MD 20771, USAUSN, Res Lab, ARTEP Inc, Washington, DC 20375, USAUSN, Res Lab, Washington, DC 20375, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoBrosius, JW, NASA, Goddard Space Flight Ctr, Catholic Univ, Code 682, Greenbelt, MD 20771 USA TI - Measurements of three-dimensional coronal magnetic fields from coordinated extreme-ultraviolet and radio observations of a solar active region sunspot AB - We observed NOAA Active Region 8108 around 1940 UT on 1997 November 18 with the Very Large Array and with three instruments aboard the NASA/ESA Solar and Heliospheric Observatory satellite, including the Coronal Diagnostic Spectrometer, the EUV Imaging Telescope, and the Michelson Doppler Imager. We used the right-hand and left-hand circularly polarized components of the radio observing frequencies, along with the coordinated EUV observations, to derive the three-dimensional coronal magnetic field above the regions sunspot and its immediate surroundings. This was done by placing the largest possible harmonic (which corresponds to the smallest possible magnetic field strength) for each component of each radio frequency into appropriate atmospheric temperature intervals such that the calculated radio brightness temperatures at each spatial location match the corresponding observed values. The temperature dependence of the derived coronal magnetic field, B(x, y, T), is insensitive to uncertainties on the observed parameters and yields field strengths in excess of 580 G at 2 x 10(6) K and in excess of 1500 G at 1 x 10(6) K. The height dependence of the derived coronal magnetic field, B(x, y, T), varies significantly with our choice of magnetic scale height L-B. Based on L-B = 3.8 x 10(9) cm derived from the relative displacements of the observed radio centroids, we find magnetic field strengths in excess of 1500 G at heights of 15,000 km and as great as 1000 G at 25,000 km. By observing a given target region on several successive days, we would obtain observations at a variety of projection angles, thus enabling a better determination of L-B and, ultimately, B(x, y, h). We compare coronal magnetic fields derived from our method with those derived from a potential extrapolation and find that the magnitudes of the potential field strengths are factors of 2 or more smaller than those derived from our method. This indicates that the sunspot field is not potential and that currents must be present in the corona. Alfven speeds between 25,000 and 57,000 km s(-1) are derived for the 1 x 10(6) K plasma at the centroids of the radio observing frequencies. Filling factors between 0.003 and 0.1 are derived for the 1 x 10(6) K plasma at the centroids of the radio observing frequencies MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176978200039 L2 - Sun : activity;Sun : corona;Sun : magnetic fields;Sun : radio radiation;Sun : UV radiation;sunspots;STRUCTURES OBSERVING CAMPAIGN; HIGH-SPATIAL-RESOLUTION; OPTICALLY THIN PLASMAS; X-RAY OBSERVATIONS; EMISSION-LINES; ATOMIC DATABASE; MICROWAVE; TEMPERATURE; SUN; SPECTRUM SO - Astrophysical Journal 2002 ;574(1):453-466 4955 UI - 10932 AU - Brostow W AU - Castano VM AU - Das-Gupta D AU - Hess M AU - Jaklewicz M AD - Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USANatl Autonomous Univ Mexico, Dept Appl Phys & Adv Technol, FATA, Queretaro 67000, Qro, MexicoUniv Wales, Sch Elect Engn & Comp Syst, Bangor LL57 1UT, Gwynedd, WalesGerhard Mercator Univ, FB Phys Chem 6, D-47048 Duisburg, GermanyBrostow, W, Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USA TI - POLYCHAR-9 Worldwide Forum on Polymer Applications and Theory in 2001 AB - Profile of POLYCHAR conferences is briefly defined. An introduction to the following papers presented at the POLYCHAR-9 conference in January 2001 is provided. Prizes awarded at the POLYCHAR-9 Forum and the composition of the Prize Committee are listed MH - Germany MH - Mexico|Queretaro MH - USA MH - United Kingdom PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Editorial Material AV - English IS - 1432-8917 UR - ISI:000176213000001 L2 - polymer research;polymer applications;polymer theory;polymer computer simulations;MECHANICAL-PROPERTIES; SPECTROSCOPY SO - Materials Research Innovations 2002 ;5(6):240-242 4956 UI - 11482 AU - Brower LP AU - Castilleja G AU - Peralta A AU - Lopez-Garcia J AU - Bojorquez-Tapia L AU - Diaz S AU - Melgarejo D AU - Missrie M AD - Univ Florida, Dept Zool, Gainesville, FL 32611, USAWorld Wildlife Fund, Endangered Spaces Program, Washington, DC 20037, USAUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 06170, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 06170, DF, MexicoUniv Minnesota, Dept Conservat Biol, St Paul, MN 55108, USABrower, LP, Sweet Briar Coll, Dept Biol, Sweet Briar, VA 24595, USA TI - Quantitative changes in forest quality in a principal overwintering area of the monarch butterfly in Mexico, 1971-1999 AB - Degradation of the oyame fir-pine forest ecosystem in central,Mexico is a threat to the overwintering and migratory phenomenon of the eastern North American population of the monarch butterfly (Danaus plexippus). Because a lack of quantitative data has hindered effective conservation policy, we photogrammatically, analyzed the changing state of a major overwintering forest area. We anal zed stereographic aerial photographs of a 42,020-ha area taken in 1971, 1984, and 1999 will; GRASS, a geographic information system. What in 1971 was a nearly, continuous high-quality forest is now fragmented and severely, degraded. Between 1971 and 1999, 44% of conserved forest (forest with >80% cover) was degraded, and the largest patch of high-quality, forest was reduced from 27,115 ha to 5827 ha. The annual rate of degradation from 1971 to 1984 was 1.70%, and this increased to 2.41% during the next 15 years, At the latter rate, <10,000 ha of high-quality forest will remain in 20 years and <4,500 ha in,50,years. A subset of the analysis quantified changes in a 6596ha area on the Sierra Chincua, Sierra Campanario, and Cerro Chivati Huacal massifis that were declared protected by presidential decree in 1986 Corresponding rates of degradation of these reserves more than tripled from approximately, 1.0% between 1971 and 1984 to more than 3% between 1984 and 1999. Passage of the 1986 decree failed to protect the forest. Our data provide irrefutable evidence that successful implementation of a more inclusive presidential decree issued in November 2000 will require (1) effective enforcement against logging within the oyamel-pine forest ecosystem and (2) restoration of areas that have been degraded. All indications are that the rate of logging is increasing throughout the area. The grandeur of the monarch butterfly, overwintering phenomenon in this tiny area of,Mexico is too great a cultural and biological treasure for this rampantly destructive process to continue MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 17 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000174750800013 SO - Conservation Biology 2002 ;16(2):346-359 4957 UI - 11100 AU - Brown KH AU - Peerson JM AU - Rivera J AU - Allen LH AD - Univ Calif Davis, Dept Nutr, Davis, CA 95616, USAUniv Calif Davis, Program Int Nutr, Davis, CA 95616, USAInst Salud Publ, Ctr Nutr & Salud, Cuernavaca, Morelos, MexicoBrown, KH, Univ Calif Davis, Dept Nutr, 1 Shields Ave, Davis, CA 95616 USA TI - Effect of supplemental zinc on the growth and serum zinc concentrations of prepubertal children: a meta-analysis of randomized controlled trials AB - Background: Multiple studies have been carried out to assess the effect of zinc supplementation on children's growth. The results of these studies are inconsistent, and the factors responsible for these varied outcomes are unknown. Objective: Meta-analyses of randomized controlled intervention trials were therefore completed to assess the effect of zinc supplementation on the physical growth and serum zinc concentrations of prepubertal children. Design: A total of 33 acceptable studies with appropriate data were identified by MEDLINE (National Library of Medicine, Bethesda, MD) searches and other methods. Weighted mean effect sizes (expressed in SD units) were calculated for changes in height, weight, weight-for-height, and serum zinc concentration by using random-effects models factors associated with effect sizes were explored by meta-regression techniques. Results: Zinc supplementation produced highly significant, positive responses in height and weight increments, with effect sizes of 0.350 (95% CI: 0.189, 0.511) and 0.309 (0.178, 0.439), respectively. There was no significant effect of zinc on weight-for-height indexes [weighted mean effect size: -0.018 (-0.132, 0.097)]. Zinc supplementation caused a large increase in the children's serum zinc concentrations, with an effect size of 0.820 (0.499, 1.14). Growth responses were greater in children with low initial weight-for-age z scores and in those aged >6 mo with low initial height-for-age z scores. Conclusions: Interventions to improve children's zinc nutriture should be considered in populations at risk of zinc deficiency, especially where there are elevated rates of underweight or stunting. The population mean serum zinc concentration is a useful indicator of the successful delivery and absorption of zinc supplements in children MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 108 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000175783200016 L2 - zinc;growth;serum zinc;zinc deficiency;nutritional assessment;indicators;children;meta-analysis;FOR-GESTATIONAL-AGE; PRESCHOOL-CHILDREN; BODY-COMPOSITION; LINEAR GROWTH; INTERVENTION TRIAL; INCREASES GROWTH; SHORT STATURE; VITAMIN-A; FACTOR-I; INFANTS SO - American Journal of Clinical Nutrition 2002 ;75(6):1062-1071 4958 UI - 12010 AU - Brumbaugh GW AU - Herman JD AU - Clancy JS AU - Burden KI AU - Barry T AU - Simpson RB AU - Lopez HS AD - Texas A&M Univ, Coll Vet Med, Dept Vet Physiol, College Stn, TX 77843, USATexas A&M Univ, Coll Vet Med, Dept Pharmacol, College Stn, TX 77843, USATexas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843, USAUniv Nacl Autonoma Mexico, Fac Med Vet, Dept Fisiol & Farmacol, Mexico City 04510, DF, MexicoBrumbaugh, GW, Texas A&M Univ, Coll Vet Med, Dept Vet Physiol, College Stn, TX 77843 USA TI - Effect of tilmicosin on chemotactic, phagocytic, and bactericidal activities of bovine and porcine alveolar macrophages AB - Objective-To evaluate chemotactic, phagocytic, and bactericidal activities of bovine and porcine alveolar macrophages (AM) exposed to tilmicosin. Animals-12 healthy calves and 12 healthy pigs. Procedures-Lungs were obtained immediately after euthanasia; AM were collected by means of bronchoalveolar lavage and density gradient centrifugation. Chemotactic activity was evaluated by exposing AM to lipopolysaccharide or macrophage inhibitory peptide during incubation with tilmicosin. Phagocytic activity was evaluated by incubating AM with tilmicosin for 24 hours and then with tilmicosin-resistant Salmonella serotype Typhimurium. Bactericidal activity was evaluated by incubating AM with tilmicosin (0, 10, or 20 mug/ml for bovine AM; 0 or 10 mug/ml or 10 mug/ml but washed free of tilmicosin for porcine AM) and then with Mannheimia haemolytica (bovine AM) or with Actinobacillus pleuropneumoniae or Pasteurella multocida (porcine AM). Results-Tilmicosin had no significant effects on chemotactic or phagocytic activities of bovine or porcine AM. The time-course of bactericidal activity was best described by polynomial equations. Time to cessation of bacterial growth and area under the time versus bacterial number curve were significantly affected by incubation of AM with tilmicosin. Conclusions and Clinical Relevance-Results show that bactericidal activity of bovine and porcine AM was enhanced by tilmicosin, but not in proportion to the reported ability of AM to concentrate tilmicosin intracellularly. With or without exposure to tilmicosin, the time-course of bactericidal activity of bovine AM against M haemolytica and of porcine AM against A pleuropneumoniae or P multocida was too complex to be reduced to a simple linear equation MH - Mexico|Distrito Federal MH - USA PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000173187100006 L2 - AZITHROMYCIN SO - American Journal of Veterinary Research 2002 ;63(1):36-41 4959 UI - 10467 AU - Brunkan NM AU - Jones WD AU - Lachicotte RJ AU - Garcia JJ AD - Univ Rochester, Dept Chem, Rochester, NY 14627, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - C-CN bond activation and olefin isomerization in Ni complexes of aryl and allyl cyanides MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000177422203763 SO - Abstracts of Papers of the American Chemical Society 2002 ;224():U723-U723 4960 UI - 11136 AU - Buenrostro-Gonzalez E AU - Andersen SI AU - Garcia-Martinez JA AU - Lira-Galeana C AD - Inst Mexicano Petr, Branch Mol Engn, Thermodynam Res Lab, Mexico City 07730, DF, MexicoTech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkLira-Galeana, C, Inst Mexicano Petr, Branch Mol Engn, Thermodynam Res Lab, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Solubility/molecular structure relationships of asphaltenes in polar and nonpolar media AB - Asphaltenes separated from a Maya type of crude oil were suspended in toluene and later fractionated by solubility in a polar (acetone) and a nonpolar (n-heptane) precipitating solvent. The two sets of derived fractions were characterized using size exclusion chromatography (SEC), elemental analysis, Fourier transform infrared spectroscopy (FTIR), and synchronous fluorescence spectroscopy and proton nuclear magnetic resonance (H-1 NMR) spectroscopy. The results show that the acetone-precipitated asphaltene fractions have larger structural differences compared with those of n-heptane. The average size of the aromatic and aliphatic-substitutions regions of each fraction was also found to correlate with asphaltene solubility in such a way that the smaller the aromatic region and the larger the aliphatic substitution, the greater the solubility. These correlations may provide further explanations as to the role of structural properties on the solubility of asphaltenes in polar and nonpolar media MH - Denmark MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000175693900027 L2 - MAGNETIC-RESONANCE SPECTROSCOPY; PETROLEUM ASPHALTENES; ATHABASCA ASPHALTENE; CRUDE-OIL; MOLECULAR-WEIGHT; C-13 NMR; PROTON; FRACTIONATION; PRECIPITATION; DISSOLUTION SO - Energy & Fuels 2002 ;16(3):732-741 4961 UI - 11698 AU - Bukovsky A AU - Ayala ME AU - Dominguez R AU - Keenan JA AU - Wimalasena J AU - Elder RF AU - Caudle MR AD - Univ Tennessee, Grad Sch Med, Dept Obstet & Gynecol, Lab Dev Differentiat & Canc, Knoxville, TN 37920, USAUNAM, Fac Estudios Profesionales Zaragoza, Lab Biol Reprod, Mexico City, DF, MexicoBukovsky, A, Univ Tennessee, Grad Sch Med, Dept Obstet & Gynecol, Lab Dev Differentiat & Canc, 1924 Alcoa Highway, Knoxville, TN 37920 USA TI - Changes of ovarian interstitial cell hormone receptors and behavior of resident mesenchymal cells in developing and adult rats with steroid-induced sterility AB - In the present paper. we report that injection of testosterone propionate (500 mug) during the critical window of rat development (postnatal day 5) induces temporary appearance of aged interstitial cells in developing ovaries (days 7 and 10). Aged interstitial cells showed large size (greater than or equal to 12 mum), enhanced androgen receptor (AR) and low estrogen (ER) and luteinizing hormone receptor (LHR) expression. Although normal mature interstitial cells (large size and strong ER and LHR expression) appeared later (day 14), and ovaries of androgenized rats were similar to normal ovaries between days 14 and 35, ovaries of adult androgenized females showed only aged and no mature interstitial cells. Androgenization on day 10 caused the development of aged interstitial cells on day 14, but adult ovaries were normal. Long lasting postnatal estrogenization (estradiol dipropionate for four postnatal weeks) caused in developing and adult ovaries a lack of interstitial cell development beyond the immature state. Immature interstitial cells were characterized by a small size (less than or equal to 7 mum) and a lack of AR, ER and LHR expression. Because the critical window for steroid-induced sterility coincides with the termination of immune adaptation, we also investigated distribution of mesenchymal cells (Thy-1 mast cells and pericytes. ED1 monocyte-derived cells, CD8 T cells. and cells expressing OX-62 of dendritic cells) in developing and adult ovaries. Developing ovaries of normal, androgenized and estrogenized females were populated by similar mesenchymal cells, regardless of differences in the state of differentiation of interstitial cells. However, mesenchymal cells in adult ovaries showed distinct behavior. In normal adult ovaries. differentiation of mature interstitial cells was accompanied by differentiation of mesenchymal cells. Aged interstitial cells in ovaries of androgenized rats showed precipitous degeneration of resident mesenchymal cells. Immature interstitial cells in ovaries of estrogenized rats showed a lack of differentiation of resident mesenchymal cells. These observations indicate that an alteration of interstitial cell differentiation during immune adaptation toward the aged phenotype results in precipitous degeneration of resident mesenchymal cells and premature aging of ovaries in adult rats. and alteration toward immature phenotype results in a lack of differentiation of mesenchymal cells and permanent immaturity of ovaries in adult females. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0039-128X UR - ISI:000174045100015 L2 - steroid-induced sterility;androgens;estrogens;ontogeny;immune adaptation;hormone receptors;cellular aging;cellular immaturity;LUTEINIZING-HORMONE; ANDROGEN RECEPTOR; FEMALE RATS; LOCALIZATION; EXPRESSION; ESTROGEN; ALPHA; RESPONSIVENESS; ONTOGENY; BETA SO - Steroids 2002 ;67(3-4):277-289 4962 UI - 11233 AU - Bulakh BM AU - Jumayev BR AU - Korsunska NO AU - Litvin OS AU - Torchynska TV AU - Khomenkova LY AU - Yukhymchuk VO AD - Natl Acad Sci Ukraine, Inst Semicond Phys, UA-03028 Kiev, UkraineInst Politecn Nacl, UPALM, Mexico City 07738, DF, MexicoBulakh, BM, Natl Acad Sci Ukraine, Inst Semicond Phys, UA-03028 Kiev, Ukraine TI - The interrelation of surface relief of porous silicon with specific features of Raman spectra AB - Structural characteristics and Raman spectra of porous silicon layers were investigated. It was demonstrated that the effect of enhancement of the signal intensity of Raman scattering from porous silicon compared with the signal intensity from the substrate is associated with the presence of micrometer-size pores in the samples. A model making it possible to explain this enhancement, the signal shape, and the coincidence of the signal from the porous layer by the shape and location with the line from the Si substrate is suggested. (C) 2002 MAIK "Nauka / Interperiodica" MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7826 UR - ISI:000175232000014 L2 - STRUCTURAL-PROPERTIES; SILOXENE SO - Semiconductors 2002 ;36(5):558-563 4963 UI - 12054 AU - Bullock JS AU - Kravtsov AV AU - Colin P AD - Ohio State Univ, Dept Astron, Columbus, OH 43210, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoBullock, JS, Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA TI - Angular momentum profiles of warm dark matter halos AB - We compare the specific angular momentum profiles of virialized dark halos in cold dark matter (CDM) and warm dark matter (WDM) models, using high-resolution dissipationless simulations. The simulations were initialized using the same set of modes, except on small scales, where the power was suppressed in WDM below the filtering length. Remarkably, WDM as well as CDM halos are well described by the two-parameter angular momentum profile of Bullock and coworkers, even though the halo masses are below the filtering scale of the WDM. Although the best-fit shape parameters change quantitatively for individual halos in the two simulations, we find no systematic variation in profile shapes as a function of the dark matter type. The scatter in shape parameters is significantly smaller for the WDM halos, suggesting that substructure and/or merging history plays a role in producing scatter about the mean angular momentum distribution, but that the average angular momentum profiles of halos originate from larger scale phenomena or a mechanism associated with the virialization process. The known mismatch between the angular momentum distributions of dark halos and disk galaxies is, therefore, present in WDM as well as CDM models. Our WDM halos tend to have a less coherent (more misaligned) angular momentum structure and smaller spin parameters than do their CDM counterparts, although we caution that this result is based on a small number of halos MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173154400001 L2 - cosmology : theory;galaxies : formation;DISK GALAXIES SO - Astrophysical Journal 2002 ;564(1):L1-L4 4964 UI - 9093 AU - Bunge L AU - Ochoa J AU - Badan A AU - Candela J AU - Sheinbaum J AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoBunge, L, Univ Paris 06, Lab Oceanog Dynam & Climatol, Tour 14-15,2eme Etage,Boite 100,4 Pl Jussieu, F-75252 Paris 05, France TI - Deep flows in the Yucatan Channel and their relation to changes in the Loop Current extension AB - [1] The first attempt to establish a relation between the Loop Current extension and deep flows in Yucatan Channel was made by Maul et al. [1985]; it was unsuccessful, probably because of the low spatial resolution of their observations. From September 8, 1999, to June 17, 2000, eight moorings with acoustic Doppler current profilers, current meters, and thermometers were deployed across the Yucatan Channel. The data from these arrays were used to compute time series of the transports below the level of the deepest isotherm observed in the Florida Straits, as required by a simple box model that restricts deep exchanges with the Gulf of Mexico to the Yucatan Channel. The surface extension of the Loop Current was inferred from 3 day advanced very high resolution radiometer imagery from October to May, when temperature gradients were sufficient to map the warm water unambiguously. The deep transports appear at first unrelated to the rate of change of the Loop Current extension, but filtering the series with a 20 day running mean increases the correlation between the low-pass series to 0.62, and up to 0.83 with a lag of 8.5 days, with Loop Current changes leading the deep flows. The cumulative deep transport, a quantity that favors lower frequencies, is very well related (correlations >0.9) to the surface extension of the Loop Current, also with a lag of about a week. These lags are not statistically significant but suggest a timescale for internal adjustment processes in the Gulf of Mexico. The empirical orthogonal function of the current best related to the area extension of the Loop Current represents a unidirectional flow across the entire deep section, flowing either toward or from the Gulf of Mexico, and includes a strong expression of the Yucatan Undercurrent MH - France MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 9 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000181232900004 L2 - Yucatan Channel;Loop Current;deep flows;GULF; MEXICO SO - Journal of Geophysical Research-Oceans 2002 ;107(C12): 4965 UI - 8149 AU - Buratti S AU - Duarte-Salazar C AU - Ruperto N AU - Pistorio A AU - Reiff A AU - Bernstein B AU - Maldonado-Velazquez R AU - Beristain-Manterola R AU - Maeno N AU - Takei S AU - Gerloni V AU - Spencer CH AU - Pratsidou-Gertsi P AU - Breda L AU - Martini A AU - Ravelli A AD - IRCCS G Gaslini, Genoa, ItalyHosp Gen & Infantil Mexico, Mexico City, DF, MexicoChildrens Hosp Los Angeles, Los Angeles, CA 90027, USAChildrens Hosp, Chicago, IL, USAAristotle Univ Thessaloniki, Dept Pediat 1, GR-54006 Thessaloniki, Greece TI - Relationship between health related quality of life, disease activity and damage in juvenile-onset systemic lupus erythematosus MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800834 SO - Arthritis and Rheumatism 2002 ;46(9):S318-S318 4966 UI - 11784 AU - Burgeff C AU - Liljegren SJ AU - Tapia-Lopez R AU - Yanofsky MF AU - varez-Buylla ER AD - UNAM, Inst Ecol, Mexico City 04510, DF, MexicoUniv Calif San Diego, Dept Biol, La Jolla, CA 92093, USAAlvarez-Buylla, ER, UNAM, Inst Ecol, AP Postal 70-275, Mexico City 04510, DF, Mexico TI - MADS-box gene expression in lateral primordia, meristems and differentiated tissues of Arabidopsis thaliana roots AB - Although MADS-box genes involved in flower and fruit development have been well characterized, the function of MADS-box genes expressed in vegetative structures has yet to be explored. At least seven members of this family are grouped in clades of genes that are preferentially expressed in roots of Arabidopsis thaliana (L.) Heynh.. We report here the cloning of the AGL21 MADS-box gene, which belongs to the ANRI clade, and the mRNA in situ expression patterns of this and two other root MADS-box genes. AGL17 appears to be a lateral root cap marker in the root tip, and towards the elongation zone this gene is expressed in the epidermal cells. AGL21 is highly expressed in lateral root primordia and it has a punctate expression pattern in the primary root meristem. AGL12 also has a punctate expression pattern in the primary root meristem. AGL12 and AGL21 are also expressed in the central cylinder of differentiated roots and both are expressed in developing embryos. This study, combined with previous phylogenetic analyses, indicates that these MADS-box, genes may play distinct regulatory roles during root development MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0935 UR - ISI:000173848200005 L2 - Arabidopsis;ANR1;embryo development;lateral root primordium;MADS-box;root (MADS-box genes);CELL-DIVISION; PLANT DEVELOPMENT; ORGANIZATION; ARCHITECTURE; GRAVITROPISM; EPIDERMIS; EVOLUTION; PROTEINS; IDENTITY; APETALA1 SO - Planta 2002 ;214(3):365-372 4967 UI - 9803 AU - Burger AJ AU - D'Elia JA AU - Weinrauch LA AU - Lerman I AU - Gaur A AD - Beth Israel Deaconess Med Ctr, Boston, MA 02215, USAHarvard Univ, Sch Med, Noninvas Cardiol Lab, Boston, MA 02215, USAInst Nacl Nutr Salvador Zubiran, Dept Endocrinol, Mexico City 14000, DF, MexicoMt Auburn Hosp, Boston, MA, USAJoslin Diabet Ctr, Boston, MA 02215, USABurger, AJ, Beth Israel Deaconess Med Ctr, 1 Deaconess Rd,Baker 3, Boston, MA 02215 USA TI - Marked abnormalities in heart rate variability are associated with progressive deterioration of renal function in type I diabetic patients with overt nephropathy AB - Background: Cardiac autonomic neuropathy is a common complication of long-standing, type I diabetes and is associated with increased morbidity and mortality. Impaired heart rate variability is a sensitive and reproducible marker of cardiac autonomic neuropathy. We sought to examine the relationship between cardiac autonomic neuropathy as assessed by heart rate variability and overt nephropathy, with emphasis on the progression of renal dysfunction over I year. Method: Baseline and 12 month clinical and biochemical characteristics, as well as autonomic function tests, were analyzed in 23, type I diabetic patients (mean age 37-10 years, 65% males), who were prospectively enrolled as a part of a multi-center investigation. In addition, ambulatory, 24-h, 3-channel electrocardiograms were recorded, and heart rate variability indices were assessed in the time and frequency domains over the same period. Results: All heart rate variability indices were markedly decreased in our study population. On univariate analysis, heart rate variability was associated with creatinine clearance, and to a lesser extent, mean 24-h blood pressures and cholesterol. On multivariate analysis, only heart rate variability was a significant and independent predictor of abnormalities in creatinine clearance. Severe reduction in heart rate variability at baseline was also significantly associated with the further deterioration in renal function at I year. Conclusion: Heart rate variability is significantly reduced in long-standing, type 1 diabetics with proteinuria or overt nephropathy. Marked abnormalities in heart rate variability are significantly associated with and predictive of progressive renal deterioration at 1 year. These findings may have implications for aggressive medical intervention to improve prognosis and survival in this population. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 2 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0167-5273 UR - ISI:000179367100020 L2 - heart rate variability;diabetes mellitus;nephropathy;autonomic neuropathy;CARDIAC AUTONOMIC NEUROPATHY; URINARY ALBUMIN EXCRETION; BLOOD-PRESSURE; CARDIOVASCULAR-DISEASE; SPECTRAL-ANALYSIS; FOLLOW-UP; DYSFUNCTION; HYPERTENSION; MICROALBUMINURIA; PREVALENCE SO - International Journal of Cardiology 2002 ;86(2-3):281-287 4968 UI - 11503 AU - Burgos-Hernandez A AU - Price RL AU - Jorgensen-Kornman K AU - Lopez-Garcia R AU - Njapau H AU - Park DL AD - Louisiana State Univ, Ctr Agr, Dept Food Sci, Baton Rouge, LA 70803, USAUniv Arizona, Dept Nutr Sci, Tucson, AZ 85721, USABurgos-Hernandez, A, Univ Sonora, Dept Invest & Posgrad Alimentos, AP 1658, Hermosillo 83000, Sonora, Mexico TI - Decontamination of aflatoxin B-1-contaminated corn by ammonium persulphate during fermentation AB - The decontamination of aflatoxin B-1 (AFB(1))-contaminated corn, which is required if the corn is to be suitable for alternative use, by an ammoniation-fermentation integrated process was studied. This process could be used for the production of fuel ethanol from aflatoxin-containing corn. Different concentrations (0.25, 0.50, 1.00, 1.5 and 2.0% w/w) of ammonium persulphate were tested in the detoxification of AFB(1)-contaminated corn during fermentation. In order to increase the decontamination of corn, 0.5 and 1.0% (w/w) azodicarbonamide, benzoyl peroxide and hydrogen peroxide were tested. Peroxides were added at three different stages of the fermentation process: liquefaction, saccharification and fermentation. Levels of AFB(1) and ethanol were determined after each fermentation process. Treated corn was tested for mutagenic potential using the Ames test with TA100 tester strain and pure AFB(1) as positive control. Addition of 2.0% (w/w) ammonium persulphate caused the highest level of decontamination without affecting ethanol production. Addition of peroxides did not significantly (P < 0.05) increase ethanol production or significantly (P < 0.05) improve the decontamination process. The best processes for decontamination of corn and for ethanol production included the addition of 2.0% (w/w) ammonium persulphate for both and of 1.0 and 0.5% (w/w) benzoyl peroxide respectively. All treated corn samples showed no mutagenic potential. Possible industrial use of these processes is discussed. (C) 2002 Society of Chemical Industry MH - Mexico|Sonora MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000174630300009 L2 - aflatoxin B-1;ammonium persulphate;decontamination;Salmonella TA100;mutagenic potential;REACTION-PRODUCTS SO - Journal of the Science of Food and Agriculture 2002 ;82(5):546-552 4969 UI - 9989 AU - Burgos-Vargas R AU - Pacheco-Tena C AU - Vazquez-Mellado J AD - Univ Nacl Autonoma Mexico, Hosp Gen Mexico, Fac Med, Div Res, Mexico City 06726, DF, MexicoToronto Western Hosp, Arthritis Ctr Excellence, Toronto, ON, CanadaUniv Nacl Autonoma Mexico, Fac Med, Hosp Gen Mexico, Rheumatol Serv, Mexico City, DF, MexicoBurgos-Vargas, R, Univ Nacl Autonoma Mexico, Hosp Gen Mexico, Fac Med, Div Res, Dr Balmis 148, Mexico City 06726, DF, Mexico TI - The juvenile-onset spondyloarthritides: rationale for clinical evaluation AB - This chapter reviews the clinical events that occur in patients with juvenile-onset spondyloarthriticles (SpA) with the purpose of developing core sets, domains and instruments to evaluate disease activity and disease damage. We discuss several aspects, from concept and classification to clinical features and instruments already in use for measuring adult-onset SpA and childhood arthritides. Similarly, comparisons between juvenile-onset SpA, its adult counterpart, and other forms of juvenile arthritis are made to consider the adaptation of existing instruments or to develop specific ones MH - Canada MH - Mexico|Distrito Federal PB - LONDON: BAILLIERE TINDALL RP - NOT IN FILE U3 - TC 4 U4 - Rheumatology U5 - J;Article AV - English IS - 1521-6942 UR - ISI:000178874000006 L2 - juvenile arthritis;spondyloarthropathies;enthesopathy;juvenile ankylosing spordylitis;psoriatic arthritis;outcome measures;C-REACTIVE PROTEIN; ANKYLOSING-SPONDYLITIS; RHEUMATOID-ARTHRITIS; PEDIATRIC-RHEUMATOLOGY; SERONEGATIVE ENTHESOPATHY; PSORIATIC-ARTHRITIS; DISEASE-ACTIVITY; PRELIMINARY DEFINITION; ARTHROPATHY SYNDROME; FUNCTIONAL ABILITY SO - Best Practice & Research in Clinical Rheumatology 2002 ;16(4):551-572 4970 UI - 11207 AU - Burgos-Vargas R AU - Rudwaleit M AU - Sieper J AD - Hosp Gen Mexico City, Div Res, Mexico City 06726, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 06726, DF, MexicoHosp Gen Mexico City, Fac Med, Mexico City 06726, DF, MexicoUniv Hosp Benjamin Franklin, Dept Med, Berlin, GermanyBurgos-Vargas, R, Hosp Gen Mexico City, Div Res, Dr Balmis 148, Mexico City 06726, DF, Mexico TI - The place of juvenile onset spondyloarthropathies in the Durban 1997 ILAR classification criteria of juvenile idiopathic arthritis MH - Germany MH - Mexico|Distrito Federal PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 14 U4 - Rheumatology U5 - J;Editorial Material AV - English IS - 0315-162X UR - ISI:000175430100002 L2 - SPONDYLARTHROPATHY-STUDY-GROUP; PSORIATIC-ARTHRITIS; REACTIVE ARTHRITIS; CHILDHOOD ARTHRITIS; FOLLOW-UP; CHILDREN; DIAGNOSIS; PROGNOSIS; PROPOSAL; HLA SO - Journal of Rheumatology 2002 ;29(5):869-874 4971 UI - 11426 AU - Burillo G AU - Clough RL AU - Czvikovszky T AU - Guven O AU - Le Moel A AU - Liu WW AU - Singh A AU - Yang JT AU - Zaharescu T AD - Sandia Natl Labs, Organ Mat Dept, Albuquerque, NM 87185, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoTech Univ Budapest, Dept Polymer Engn & Text Technol, H-1111 Budapest, HungaryIAEA, A-1400 Vienna, AustriaCEA, DSM, DRECAM, SRSIM, F-91191 Gif Sur Yvette, FranceTsing Hua Univ, Huaye Inst Innovat Technol, Beijing 100084, Peoples R ChinaAHA Enterprises, Victoria, BC V8Y 2R6, CanadaR&D Inst Elect Engn, RO-74204 Bucharest, RomaniaClough, RL, Sandia Natl Labs, Organ Mat Dept, MS 0888, Albuquerque, NM 87185 USA TI - Polymer recycling: potential application of radiation technology AB - Management of solid waste is an important problem, which is becoming progressively worse as a byproduct of continuing economic growth and development. Polymeric materials (plastics and rubbers) comprise a steadily increasing proportion of the municipal and industrial waste going into landfill. Development of technologies for reducing polymeric waste. which are acceptable from the environmental standpoint, and which are cost-effective, has proven to be a difficult challenge due to complexities inherent in the reuse of polymers. Establishing optimal processes for the reuse/recycling of polymeric materials thus remains a worldwide challenge as we enter the new century. Due to the ability of ionizing radiation to alter the structure and properties of bulk polymeric materials, and the fact that it is applicable to essentially all polymer types, irradiation holds promise for impacting the polymer waste problem. The three main possibilities for use of radiation in this application are: (1) enhancing the mechanical properties and performance of recovered materials or material blends, principally through crosslinking, or through surface modification of different phases being combined; (2) treatment causing or enhancing the decomposition of polymers, particularly through chain scission, leading to recovery of either low molecular weight mixtures. or powders, for use as chemical feedstocks or additives; (3) production of advanced polymeric materials designed for environmental compatibility. This paper provides an overview of the polymer recycling problem. describes the major technological obstacles to the implementation of recycling technologies, and outlines some of the approaches being taken. A review of radiation-based recycling research is then provided. followed by a discussion of future directions where irradiation may be relevant to the problems currently inhibiting the widespread recycling of polymeric materials. Published by Elsevier Science Ltd MH - USA MH - Austria MH - Canada MH - France MH - Hungary MH - Mexico|Distrito Federal MH - Peoples R China MH - Romania PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000174889000008 L2 - ELECTRON-BEAM IRRADIATION; CROSS-LINKED POLYETHYLENE; LOW-DENSITY POLYETHYLENE; EPDM-PP BLENDS; MECHANICAL-PROPERTIES; GAMMA-IRRADIATION; POLYOLEFIN BLENDS; RUBBER; POLYPROPYLENE; MORPHOLOGY SO - Radiation Physics and Chemistry 2002 ;64(1):41-51 4972 UI - 8209 AU - Burke JP AU - Williams K AU - Haffner SM AU - Villalpando CG AU - Stern MP AD - Mayo Clin & Mayo Fdn, Dept Hlth Sci Res, Rochester, MN 55905, USAUniv Texas, Hlth Sci Ctr, Div Clin Epidemiol, Dept Med, San Antonio, TX, USAHosp Bernando Sepulveda, Inst Mexicano Seguro Social, Ctr Estudios Diabet,Amer British Cowdry Med Ctr, Unidad Invest Med Enfermedades Metab, Juarez, MexicoBurke, JP, Mayo Clin & Mayo Fdn, Dept Hlth Sci Res, 200 1st St SW, Rochester, MN 55905 USA TI - Insulin sensitivity does not account for differences in type 2 diabetes incidence between San Antonio, Texas and Mexico City, Mexico MH - Mexico|Distrito Federal MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Endocrinology & Metabolism U5 - J;Letter AV - English IS - 0149-5992 UR - ISI:000183491300027 SO - Diabetes Care 2002 ;25(5):938-939 4973 UI - 10830 AU - Burlak GN AU - Koshevaya SV AU - Mansurova SS AU - Hayakawa M AD - State Autonomous Univ Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoUniv Electrocommun, Chofu, Tokyo 182, JapanBurlak, GN, State Autonomous Univ Morelos, CIICAp, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Four-wave acousto-electromagnetic interactions in crystals with a nonlinear electrostriction AB - The four-wave parametric interaction of a microwave sound with a powerful electromagnetic radiation in a strong nonlinear regime is studied numerically. The interaction occurs due to account of the fourth order terms in expansion of the free energy of the anisotropic crystal. It is shown that both instability and parametric amplification of the wave amplitude in a system take place. This leads to generation of the periodical structures of short nonlinear pulses of sound. The account of small noise in a bounded crystal leads to the quasi-coherent dynamics and results in arising of self-organizing of acousto-electromagnetic waves. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000176390900005 L2 - acousto-electromagnetic interactions;nonlinear electrostriction;quasi-coherent dynamics;solitons SO - Physica D-Nonlinear Phenomena 2002 ;166(3-4):197-207 4974 UI - 11558 AU - Burns K AU - Paternain GP AD - Northwestern Univ, Math Dept, Evanston, IL 60208, USACIMAT, Guanajuato 3600, MexicoBurns, K, Northwestern Univ, Math Dept, Evanston, IL 60208, USA TI - Anosov magnetic flows, critical values and topological entropy AB - We study the magnetic flow determined by a smooth Riemannian metric g and a closed 2-form Omega on a closed manifold M. If the lift of Omega to the universal cover (M) over tilde is exact, we can define a critical value c(g, Omega) in the sense of Mane (1997 Bol. Soc. Bras. Mat. 28 141-53) for the lift of the flow to (M) over tilde. We have c(g, Omega) < &INFIN; if and only the lift of &UOmega; has a bounded primitive. This critical value can be expressed in terms of an isoperimetric constant defined by (g, &UOmega;), which coincides with Cheeger's isoperimetric constant when M is an oriented surface and &UOmega; is the area form of g. When the magnetic flow of (g, &UOmega;) is Anosov on the unit tangent bundle SM, we show that 1/2 > c(g, &UOmega;) and any closed bounded form in <(M)over tilde> of degree greater than or equal to 2 has a bounded primitive. Next we consider the one-parameter family of magnetic flows on SM associated with the pair (g, lambdaOmega) for lambda greater than or equal to, 0, where Omega is such that its lift to (M) over tilde, has a bounded primitive. We introduce a volume entropy h(v)(lambda) defined as the exponential growth rate of the average volume of certain balls. We show that h(v)(lambda) less than or equal to h(top)(lambda), where h(top)(lambda) is the topological entropy of the magnetic flow of (g, lambdaOmega) on SM and that equality holds if the magnetic flow of (g, lambdaOmega) is Anosov on SM. If lambda(1) less than or equal to lambda(2) and the magnetic flows for (g, lambda(1)Omega) and (g, lambda(2)Omega) are both Anosov on SM, then h(v)(lambda(1)) greater than or equal to h(v)(lambda(2)). We construct an example of a Riemannian metric of negative curvature on a closed oriented surface of higher genus such that if Ox is the magnetic flow associated with the area form with intensity lambda, then there are values of the parameter 0 < lambda(1) < lambda(2) with the property that phi(lambda1) has conjugate points and phi(lambda2) is Anosov. Variations of this example show that it is also possible to exit and reenter the set of Anosov magnetic flows arbitrarily many times along the one-parameter family. Moreover, we can start with a Riemannian metric with conjugate points and end up with an Anosov magnetic flow for some lambda > 0. Finally we have a version of the example (in which Omega is no longer the area form) such that the topological entropy of phi(lambda1) is greater than the topological entropy of the geodesic flow, which in turn is greater than the topological entropy of phi(lambda2) MH - Mexico|Guanajuato MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0951-7715 UR - ISI:000174577100005 L2 - NO CONJUGATE-POINTS; GEODESIC-FLOWS; LAGRANGIAN SYSTEMS; SURFACES; FIELDS SO - Nonlinearity 2002 ;15(2):281-314 4975 UI - 11259 AU - Bustamante J AU - Rodriguez FC AD - Benemerita Univ Autonoma Puebla, Fac Fis Matemat, Puebla 72570, PUE, MexicoUniv Austral Chile, Ctr Docencia Super Ciencias Basicas, Valdivia, ChileBustamante, J, Benemerita Univ Autonoma Puebla, Fac Fis Matemat, Colonia San Manuel 72571,Ave San Claudio & Rio Ve, Puebla 72570, PUE, Mexico TI - Rational approximation to vertical bar x vertical bar in Lipschitz norms AB - We present an estimate for the rate of convergence in Lipschitz norm of the Newman's sequence for \x\ MH - Chile MH - Mexico|Puebla PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000175298500003 L2 - rational approximation;Lipschitz norms SO - Mathematische Nachrichten 2002 ;237():40-44 4976 UI - 9927 AU - Butler R AU - Lomnitz C AD - IRIS Consortium, Washington, DC, USAUNAM, Inst Geofis, Mexico City 04510, DF, MexicoButler, R, IRIS Consortium, 1200 New York Ave NW, Washington, DC, USA TI - Coupled seismoacoustic modes on the seafloor AB - [1] Wave-to-wave coupling arises when an acoustic pulse selects a Rayleigh mode of the same speed and both travel together swapping energy across an interface [Ewing et al., 1957]. A distinctive signal is observed at the Hawaii-2 Observatory for purely oceanic paths from earthquakes on the Blanco and Mendocino Fracture Zones, off the coast of North America. The signal appears to be a composite of undispersed higher Rayleigh modes propagating along the ocean floor both in the sediments and in the water. The new coupled modes are identified by their frequency composition and their phase and group velocities. Seismoacoustic coupling at the seafloor is conditioned on (a) the presence of a low-velocity interface at the ocean floor, and (b) the wavelength of the Rayleigh component being shorter than the depth of the water layer MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000178888300088 L2 - EAST PACIFIC RISE SO - Geophysical Research Letters 2002 ;29(10): 4977 UI - 9948 AU - Caballero M AU - Ortega B AU - Valadez F AU - Metcalfe S AU - Macias JL AU - Sugiura Y AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Edinburgh, Dept Geog, Edinburgh EH8 9XP, Midlothian, ScotlandNatl Autonomous Univ Mexico, Inst Invest Antropol, Mexico City 04510, DF, MexicoCaballero, M, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Sta. Cruz Atizapan: a 22-ka lake level record and climatic implications for the late Holocene human occupation in the Upper Lerma Basin, Central Mexico AB - The Upper Lerma is a high altitude basin with three water bodies linked by the Lerma River. This basin has a long archaeological history, characterised by the establishment of settlements within the lacustrine ecosystem itself (man-made islands) during the late Classic to Epiclassic (AD 550-900), which were abandoned by the end of the Epiclassic. The Upper Lerma is an ideal site to study climatic and environmental conditions during the period of human occupation, as well as during the last full-glacial/interglacial cycle. Two sediment cores (STCRZ: 9.54 in and Almoloya del Rio: 5.12 in) were recovered from the highest lake in the system (Chignahuapan). Ten radiocarbon dates provide chronologies for these sequences in which the Tres Cruces Tephra (c. 8500 yr BP) and the Upper Toluca Pumice (c. 11600 yr BP) serve as stratigraphic markers. Magnetic properties, loss on ignition, and diatom analyses were used to infer lake level fluctuations during the last c. 22000 yr 13P. The Late Pleistocene environment was characterised by a freshwater lake. High sediment input and variable lake levels are recorded during the Last Glacial Maximum (c. 19 000-16 000 yr BP), while slightly higher water levels and reduced sediment input are recorded during the Late Glacial (c. 16 000-11 000 yr BP). A short episode of shallow conditions is inferred by c. 12 400 yr BP. Holocene lake levels were generally shallower, and three episodes of very shallow, slightly alkaline waters are identified. The first dates to the early Holocene (c. 11 000-7000 yr BP). The second is centred at c. 4600/4500 yr BP. The third occurred between c. 2000 (?) and 800 yr BP (c. 200 BC-AD 1100, calibrated ages) with very shallow water after c. 1400 yr BP (AD 550, calibrated age). Lake level increased after c. 800 yr BP. These three shallow water events are also recorded at other sites in Central Mexico indicating regional climatic trends rather than local events. A deeper water phase occurred between 7000 and 6400/6200 yr BP. The last shallow water phase correlates with the Classic and Epiclassic periods (AD 200-900), and shallowest conditions occurred in the late Classic to Epiclassic (c. AD 550-900), when the construction of man-made islands reached a peak. An increase in lake level after c. 800 yr BP (AD 1100 calibrated age) may have led to the abandonment of this life strategy. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Geography, Physical;Geosciences, Multidisciplinary;Paleontology U5 - J;Article AV - English IS - 0031-0182 UR - ISI:000178922400003 L2 - palaeclinmology;palaeoclimatology;archaeology;Mexico;Quaternary;Late Pleistocene;Holocene;diatoms;magnetic properties;ENVIRONMENTAL-CHANGE; LATE PLEISTOCENE; CHALCO; PALEOENVIRONMENTS; DIATOM; TOLUCA SO - Palaeogeography Palaeoclimatology Palaeoecology 2002 ;186(3-4):217-235 4978 UI - 10244 AU - Cabello-Pasini A AU - Lara-Turrent C AU - Zimmerman RC AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoMoss Landing Marine Labs, Moss Landing, CA 95039, USACabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Effect of storms on photosynthesis, carbohydrate content and survival of eelgrass populations from a coastal lagoon and the adjacent open ocean AB - Annual variations in density, morphology, pigment levels, carbohydrate levels and photosynthetic characteristics of Zostera marina L. (eelgrass) from a coastal lagoon and from an unprotected area in the open coast were compared to understand the environmental regulation of this species growing near the southern limit of its distribution in the eastern Pacific. From January to April of 1997, light attenuation coefficients at the lagoon and the open coast increased six-fold as a result of sediment resuspension caused by storms in the area. During the storms, in situ irradiance was reduced two-fold at the lagoon. Irradiance values at the open coast, however, were reduced to nearly zero for >3 weeks, promoting the disappearance of the open coast population. At the open coast, eelgrass shoots died after sugar and starch content in the leaves decreased by approximately 85% after 3 weeks of light limitation. The re-appearance of eelgrass seedlings at the open coast coincided with the end of the winter storms in the area and decreasing water column turbidity. Maximum photosynthesis values of eelgrass from the open coast were two-fold greater than those from lagoon plants, except during March-June when seeds germinated at the open coast. Similarly, survival and leaf carbohydrate content of eelgrass from both sites decreased by >90% when incubated for 3 weeks in darkness. Collectively, these results indicate that the disappearance of eelgrass at the open coast is regulated by irradiance and not by an endogenous cycle. Although eelgrass can succeed in the open coast given sufficient light during the year, the accumulation and mobilization of carbon reserves appear to play a key role in the dynamics of eelgrass survival in temporally variable environments. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000178231500005 L2 - in situ irradiance;photosynthesis;seasonality;storms;sugar;Zostera marina;ZOSTERA-MARINA L; SAN-FRANCISCO BAY; SEASONAL GROWTH; LAMINARIA-LONGICRURIS; LIGHT; SEAGRASS; BIOMASS; ALLOCATION; IRRADIANCE; METABOLISM SO - Aquatic Botany 2002 ;74(2):149-164 4979 UI - 10544 AU - Cabral-Rosetti LG AU - Matos T AU - Nunez D AU - Sussman RA AD - Univ Nacl Autonoma Mexico, ICN, Mexico City 94510, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 14740, DF, MexicoPenn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USACabral-Rosetti, LG, Univ Nacl Autonoma Mexico, ICN, Circuito Exterior,CU,Apartado Postal 70-543, Mexico City 94510, DF, Mexico TI - Hydrodynamics of galactic dark matter AB - We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modelling this halo as a spherically symmetric and static perfect fluid satisfying the field equations of general relativity, visible baryonic matter can be treated as 'test particles' in the geometry of this field. We show that the assumption of an empirical 'universal rotation curve' that fits a wide variety of galaxies is compatible, under suitable approximations, with state variables characteristic of a non-relativistic Maxwell-Boltzmann gas that becomes an isothermal sphere in the Newtonian limit. Consistency criteria lead to a minimal bound for particle masses in the range 30 eV < m < 60 eV and to a constraint between the central temperature and the particle mass. The allowed mass range includes popular supersymmetric particle candidates, such as the neutralino, axino and gravitino, as well as lighter particles (m approximate to keV) proposed by numerical n-body simulations associated with self-interactive CDM and WDM structure formation theories MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000177194300006 L2 - ART. NO. 063506; WARM; NEUTRINOS; PARTICLE; UNIVERSE; HALOS; MODEL; GALAXIES SO - Classical and Quantum Gravity 2002 ;19(14):3603-3615 4980 UI - 9517 AU - Cabrera JM AU - Mejia I AU - Prado JM AD - Univ Politecn Cataluna, ETSEIB, Dept Ciencia Mat & Ingn Met, Barcelona 08028, SpainCtr Tecnol Manresa, Barcelona, SpainUniv Michoacana San Nicolas Hidalgo, Inst Invest Met, Morelia, Michoacan, MexicoCabrera, JM, Univ Politecn Cataluna, ETSEIB, Dept Ciencia Mat & Ingn Met, Av Diagonal 647, Barcelona 08028, Spain TI - Effect of rare-earth metals on the hot strength of HSLA steels AB - An experimental study was done on the effect of rare-earth metals on a high-strength low-alloy steel. The work was focused in deriving the influence on Ce and La on the hot-working behavior. For this purpose, uniaxial hot-compression tests were carried out in a wide range of temperatures and strain rates. The effect of the rare-earth metals was determined by comparison of the characteristic parameters, describing the constitutive equations of the high-temperature response of the steel with, and without, rare-earth metals. The results showed that rare-earth metals were playing a major significant role on hardening mechanisms rather than on softening by dynamic recovery. On the contrary, rare-earth metals were able to delay the onset of dynamic recrystallization. All the present experimental results suggested that the latter roles are played by solid solution strengthening, through a solute drag effect, and not by precipitated particles MH - Mexico|Michoacan MH - Spain PB - MUNICH: CARL HANSER VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0044-3093 UR - ISI:000179965600004 L2 - HSLA steels;hot working;rare-earth metals;flow behavior;dynamic recrystallization;PERCENT-P ALLOY; DISSOLVED CERIUM; AUSTENITE; RECRYSTALLIZATION; BEHAVIOR; CE2O3; CES SO - Zeitschrift fur Metallkunde 2002 ;93(11):1132-1139 4981 UI - 9501 AU - Caddy JF AU - Seijo JC AD - IPN, Ctr Invest Estudios Avanzados, Unidad Merida, Merida 97300, Yucatan, MexicoUniv London, Dept Environm Sci & Technol, London WC1E 7HU, EnglandCtr Marista Estudios Super, Merida 97300, Yucatan, MexicoCaddy, JF, Via Cervialto 3,Aprilia, I-04011 Latina, Italy TI - Reproductive contributions foregone with harvesting: a conceptual framework AB - Undiscounted changes in the value of female fish from birth to maturity are calculated at equilibrium given a vector of natural mortality at age. Two types of valuations are compared; the summed harvested value of cohorts under given natural and fishing mortality vectors, and the reproductive contribution of different ages lost on capture. Incorporating a fecundity-at-age relationship allows comparison of reproductive and harvest values at age assuming inter-generational population stability. Sample calculations for Mediterranean hake (Merluccius merluccius) with parameter values from the literature suggest that the reproductive value of large females considerably exceeds their landed value after ages 4-5, and that the age at maximum reproductive value of individuals already in the population increases with exploitation rate. The implications of this type of calculation for management of heavily exploited Mediterranean hake stocks is that the focus of inshore trawl fishery should be mainly on older juvenile fish. Since the population is largely supported by the reproductive contribution of older mature hake offshore, conservation measures in the absence of a significant reduction in fishing effort should explicitly protect older spawners through use of the refugium concept and/or by more selective fishing gear. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Italy MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000180095800002 L2 - market and reproductive values;reference point;survival probability matrix;parental age;hake;fisheries for juveniles;HAKE; FISH SO - Fisheries Research 2002 ;59(1-2):17-30 4982 UI - 9365 AU - Cadena-Zapata M AU - Hoogmoed WB AU - Perdok UD AD - Univ Wageningen & Res Ctr, Soil Technol Grp, NL-6700 AA Wageningen, NetherlandsUniv Autonoma Agraria Antonio Narro, Dept Agr Machinery, Saltillo 25315, Coahuila, MexicoHoogmoed, WB, Univ Wageningen & Res Ctr, Soil Technol Grp, POB 43, NL-6700 AA Wageningen, Netherlands TI - Field studies to assess the workable range of soils in the tropical zone of Veracruz, Mexico AB - In the tropical area of Veracruz (Mexico) the decision of when and how to carry out tillage operations is based on qualitative criteria. It often results in excessive and unnecessary work, energy waste, operational delay, soil exposure to water erosion and soil structural damage. Objective criteria are needed in this area for selecting when and how to do cultivation in order to meet crop and conservation requirements. The workable range of typical soils of the area (Haplic Pheaozems) was quantified by assessing in-field implement effects on the soil structure and measuring the specific energy applied by the tractor-implement combination. This was done over a range of soil moisture contents inside and outside the theoretical friable consistency state of the soils, determined by the shrinkage and plastic limits. Empirical relationships between initial moisture content and the technological result of tillage showed that these results for moist loam and clay soils shifted from optimum to poor at soil water potentials that coincides quite well with the plastic limit. However, as soil was drying out, the implement effect changed from optimum to sub-optimum at soil moisture contents well above the shrinkage limit, so the actual field workable range was smaller than the theoretical friable status of the soils. The minimum input of specific energy to obtain optimum results, was close to the soil water potential where results changed to sub-optimum as soils were drying out. To support decisions for tillage planning and operation, valuable information on workable periods can be obtained by making use of quantified workability thresholds. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Coahuila MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Soil Science U5 - J;Article AV - English IS - 0167-1987 UR - ISI:000180360300002 L2 - Mexico;tropics;soil structure;no-tillage;energy;soil consistency;TILLAGE IMPLEMENT; WATER-CONTENT; AGGREGATION SO - Soil & Tillage Research 2002 ;68(2):83-92 4983 UI - 11493 AU - Caffesse RG AU - De Larosa MR AU - De Larosa MG AU - Mota LF AD - Univ Texas, Hlth Sci Ctr, Dent Branch, Div Periodont, Houston, TX 77030, USAAutonomous Univ Nuevo Leon, Dept Periodont, Monterrey, MexicoUniv Pittsburgh, Sch Dent Med, Dept Periodont, Pittsburgh, PA 15260, USACaffesse, RG, Univ Texas, Hlth Sci Ctr, Dent Branch, Div Periodont, 6516 John Freeman Ave,Room 309, Houston, TX 77030 USA TI - Prevalence of interleukin 1 periodontal genotype in a Hispanic dental population AB - Objective: A genetic polymorphism in the interleukin I gene has been implicated as a factor in determining the severity of adult periodontitis. Among white Europeans, the prevalence of genotype-positive subjects has been reported to be around 30%. The purpose of this study was to assess the prevalence of genotype-positive individuals in a Hispanic population. Method and materials: Fifty Mexicans were evaluated for their interleukin 1 genotype with a commercially available test. Subjects were divided into groups, as determined by their genotype (positive or negative), and were then analyzed according to age, sex, and smoking habits. Results: Thirteen of 50 subjects were genotype positive, a prevalence of 26%. The most common polymorphisms found in genotype-positive subjects were allele 1.2 for the IL1A gene and allele 1.2 for the IL1B gene. When only subjects older than 30 years were evaluated, the prevalence of genotype-positive individuals was 31%. Conclusion: The prevalence of genotype-positive subjects in a Hispanic population was 26%, similar to the prevalence found among ethnic populations from or descended from Northern, Central, and Southern Europe MH - Mexico|Nuevo Leon MH - USA PB - CAROL STREAM: QUINTESSENCE PUBL CO INC RP - NOT IN FILE U3 - TC 15 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0033-6572 UR - ISI:000174621000005 L2 - genetic polymorphism;Hispanic population;interleukin 1 genotype;periodontitis;severity;DISEASE; ASSOCIATION SO - Quintessence International 2002 ;33(3):190-194 4984 UI - 11847 AU - Caffesse RG AU - De la Rosa RM AU - De la Rosa GM AU - Weltman R AD - Univ Texas, Hlth Sci Ctr, Dent Branch, Houston, TX 77030, USAUniv Autonom Nuevo Leon, Monterrey, MexicoCaffesse, RG, Univ Texas, Hlth Sci Ctr, Dent Branch, 6516 John Freeman Ave, Houston, TX 77030 USA TI - Effect of interleukin-1 gene polymorphism in a periodontally healthy Hispanic population treated with mucogingival surgery AB - Objectives: A genetic test for susceptibility of periodontal disease has been introduced. A positive test indicates a risk factor for more severe periodontal destruction. The prevalence of genotype positive subjects has been reported around 30%. In a Mexican population, we have found a 26% prevalence of genotype positive individuals. Few studies have reported the response to therapy in these individuals. The purpose of this study was to assess the response to mucogingival surgery in an otherwise periodontally healthy Hispanic population. Materials and methods: 22 subjects (7 male and 15 female) with a mean age of 45 years participated. They were treated 3 years prior for the treatment of Types I and II recession defects using connective tissue grafts. No other active periodontal treatment was required, except for preventive maintenance. A full-mouth clinical evaluation was performed which included assessment of gingival inflammation and measurements of probing pocket depth and clinical attachment levels. Mean values per patient were determined. A finger stick blood sample was collected using specially provided DNA filter paper, let dried, and mailed for processing. Results: Results indicated that 5 out of the 22 subjects were genotype positive. The genotype positive subjects presented the following values: GI 1.13+/-0.17, PPD 2.48+/-0.46, and CAL 3.38+/-0.66. The values for the genotype negative subjects were GI 1.06+/-0.14, PPD 2.38+/-0.31 and CAL 3.11+/-0.53. No statistical significant differences were found when both groups were compared (P>0.05). Furthermore, the treatment of the localized recessions was effective and provided similar amount of coverage in genotype positive and negative subjects. However, more genotype negative subjects showed complete coverage of the recession than genotype positive individuals. Conclusions: Within the limits of this study it is concluded that (1) periodontal health can be maintained with proper preventive maintenance irrespective of the genotype present, (2) the mean response to mucogingival surgery to cover localized gingival recessions is similar irrespective of the IL-1 periodontal genotype, however, full coverage is achieved more frequently in genotype negative subjects MH - Mexico|Nuevo Leon MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 9 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0303-6979 UR - ISI:000173752100013 L2 - IL-1 genotype;polymorphism;mucogingival surgery;therapeutic results;GENOTYPE; DISEASE; TISSUE SO - Journal of Clinical Periodontology 2002 ;29(2):177-181 4985 UI - 11121 AU - Cai X AU - Flores-Hernandez J AU - Feng J AU - Yan Z AD - SUNY Buffalo, Dept Physiol & Biophys, Sch Med & Biomed Sci, Buffalo, NY 14214, USABenemerita Univ Autonoma Puebla, Inst Physiol, Puebla 72000, PC, MexicoYan, Z, SUNY Buffalo, Dept Physiol & Biophys, Sch Med & Biomed Sci, 124 Sherman Hall, Buffalo, NY 14214 USA TI - Activity-dependent bidirectional regulation of GABA(A) receptor channels by the 5-HT4 receptor-mediated signalling in rat prefrontal cortical pyramidal neurons AB - Emerging evidence has implicated a potential role for 5-HT4 receptors in cognition and anxiolysis. ;One of the main target structures of 5-HT4 receptors on 'cognitive and emotional' pathways is the prefrontal cortex (PFC). As GABAergic signalling plays a key role in regulating PFC functions, we examined the effect of 5-HT4 receptors on GABA(A) receptor channels in PFC pyramidal neurons. Application of 5-HT4 receptor agonists produced either an enhancement or a reduction of GABA-evoked currents in PFC neurons, which are both mediated by anchored protein kinase A (PKA). Although PKA phosphorylation of GABAA receptor,33 or,31 subunits leads to current enhancement or reduction respectively in heterologous expression systems, we found that beta3 and beta1 subunits are coexpressed in PFC pyramidal neurons. Interestingly, altering PKA activation levels can change the direction of the dual effect, switching enhancement to reduction and vice versa. In addition, increased neuronal activity in PFC slices elevated the PKA activation level, changing the enhancing effect of 5-HT4 receptors on the amplitude of GABAergic inhibitory postsynaptic currents (IPSCs) to a reduction. These results suggest that 5-HT4 receptors can modulate GABAergic signalling bidirectionally, depending on the basal PKA activation levels that are determined by neuronal activity. This modulation provides a unique and flexible mechanism for 5-HT4 receptors to dynamically regulate synaptic transmission and neuronal excitability in the PFC network MH - Mexico|Puebla MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 26 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000175626300003 L2 - PROTEIN-KINASE-C; CYCLIC-AMP; CHOLINERGIC INTERNEURONS; PHOSPHORYLATION SITES; AFFERENT CONNECTIONS; SEROTONIN RECEPTORS; HIPPOCAMPAL-NEURONS; FRONTAL-CORTEX; HUMAN BRAIN; A RECEPTOR SO - Journal of Physiology-London 2002 ;540(3):743-759 4986 UI - 12039 AU - Calaminici P AU - Jug K AU - Koster AM AU - rbez-Gindre C AU - Screttas CG AD - Univ Hannover, D-30167 Hannover, GermanyCINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoNatl Hellen Res Fdn, Inst Organ & Pharmaceut Chem, GR-11635 Athens, GreeceJug, K, Univ Hannover, Kleinen Felde 30, D-30167 Hannover, Germany TI - Mechanism for large first hyperpolarizabilities of phosphonic acid stilbene derivatives AB - This paper presents calculations of dipole moments (mu), static polarizabilities (alpha), and first hyperpolarizabilities (beta) of phosphonic acid stilbene derivatives calculated in the framework of density functional theory. These calculations were performed using a finite field approach implemented in the density functional program ALLCHEM and were of an all-electron type using local exchange-correlation functional and specially designed basis sets. The molecular structures have been fully optimized using the semiempirical program MSINDO, Some of the investigated stilbenes have been synthesized very recently while others are described for the first time. Donor and acceptor groups of these analogues have been modified and the influence of these changes on the first hyperpolarizabilities has been investigated. This work demonstrates that the nonlinear optical response beta of these compounds increases dramatically when the acceptor moiety is displaced by analogues containing alkali metal groups. A general mechanism for the design of novel nonlinear optical materials with large first hyperpolarizabilities is described. (C) 2002 John Wiley Sons, Inc MH - Germany MH - Greece MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000173053400009 L2 - stilbene derivatives;dipole moments;polarizabilities;hyperpolarizabilities;DENSITY-FUNCTIONAL CALCULATIONS; NONLINEAR-OPTICAL-PROPERTIES; N N-LESS-THAN-OR-EQUAL-TO-9 CLUSTERS; MOLECULAR ELECTRIC PROPERTIES; POLARIZED BASIS-SETS; DIPOLE POLARIZABILITIES; LOCAL-DENSITY; CONSISTENT MODIFICATIONS; STATIC POLARIZABILITIES; AROMATIC-COMPOUNDS SO - Journal of Computational Chemistry 2002 ;23(2):291-297 4987 UI - 11009 AU - Calderon-Garciduenas L AU - Azzarelli B AU - Acuna H AU - Garcia R AU - Gambling TM AU - Osnaya N AU - Monroy S AU - Tizapantzi MD AU - Carson JL AU - Villarreal-Calderon A AU - Rewcastle B AD - Univ N Carolina, Dept Environm Sci & Engn, Curriculum Toxicol, Chapel Hill, NC 27599, USAInst Nacl Pediat, Mexico City 14410, DF, MexicoIndiana Univ, Dept Pathol, Indianapolis, IN 46202, USAUniv N Carolina, Ctr Environm Med & Lung Biol, Chapel Hill, NC 27599, USAFoothills Prov Gen Hosp, Dept Pathol, Calgary, AB T2S 0R3, CanadaCalderon-Garciduenas, L, Univ N Carolina, Dept Environm Sci & Engn, Curriculum Toxicol, 348 Rosenau Hall CB 7431, Chapel Hill, NC 27599 USA TI - Air pollution and brain damage AB - Exposure to complex mixtures of air pollutants produces inflammation in the upper and lower respiratory tract. Because the nasal cavity is a common portal of entry, respiratory and olfactory epithelia are vulnerable targets for toxicological damage. This study has evaluated, by light and electron microscopy and immunohistochemical expression of nuclear factor-kappa beta (NF-kappaB) and inducible nitric oxide synthase (iNOS), the olfactory and respiratory nasal mucosae, olfactory bulb, and cortical and subcortical structures from 32 healthy mongrel canine residents in Southwest Metropolitan Mexico City (SWMMC), a highly polluted urban region. Findings were compared to those in 8 dogs from Tlaxcala, a less polluted, control city. In SWMMC dogs, expression of nuclear neuronal NF-kappaB and iNOS in cortical endothelial cells occurred at ages 2 and 4 weeks; subsequent damage included alterations of the blood-brain barrier (BBB), degenerating cortical neurons, apoptotic glial white matter cells, deposition of apolipoprotein E (apoE)-positive lipid droplets in smooth muscle cells and pericytes, nonneuritic plaques, and neurofibrillary tangles. Persistent pulmonary inflammation and deteriorating olfactory and respiratory barriers may play a role in the neuropathology observed in the brains of these highly exposed canines. Neurodegenerative disorders such as Alzheimer's may begin early in life with air pollutants playing a crucial role MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 17 U4 - Pathology;Toxicology U5 - J;Review AV - English IS - 0192-6233 UR - ISI:000175953700011 L2 - air pollution;Mexico City;canines;Alzheimer's;nasal epithelia;BBB;NF kappa B;iNOS;AGE-RELATED-CHANGES; NF-KAPPA-B; ASSESSING CHRONIC EXPOSURES; BETA-AMYLOID DEPOSITION; PRECURSOR PROTEIN APP; NITRIC-OXIDE SYNTHASE; NEURONAL CELL-DEATH; MEXICO-CITY AIR; ALZHEIMERS-DISEASE; NASAL-MUCOSA SO - Toxicologic Pathology 2002 ;30(3):373-389 4988 UI - 10681 AU - Calderon HA AU - Garibay-Febles V AU - Umemoto M AU - Yamaguchi M AD - IPN, ESFM, Dept Ciencia Mat, Mexico City 07338, DF, MexicoToyohashi Univ Technol, Toyohashi, Aichi, JapanKyoto Univ, Dept Mat Sci & Engn, Kyoto, JapanCalderon, HA, IPN, ESFM, Dept Ciencia Mat, UPALM Ed 9,Apdo Postal 75-707, Mexico City 07338, DF, Mexico TI - Mechanical properties of nanocrystalline Ti-Al-X alloys AB - Nanocrystalline alloys have been produced by means of mechanical milling and spark plasma sintering. Two types of materials have been obtained, TiAl-X and Al3Ti-X alloys, X represents Cr, Mn or Fe. Sintered TiAl-X alloys have a two-phase microstructure consisting of the gamma-TiAl phase and the a. phase, this last one with a globular morphology. Their average grain size varies between 100 and 150 nm. The Al3Ti-X alloys are constituted by a single phase with an Ll(2) structure and all average grain size of about 30 nm. Compression tests are used to evaluate the mechanical properties of these materials at temperatures ranging from 298 to 773 K. Very high flow stresses are found for the TiAl-X alloys, with maximum values of approximately 3 GPa. Surface traces develop during deformation at room temperature of these materials. Microscopic observation reveals dislocation activity in the larger grains. The nanocrystalline Al3Ti-X alloys show no ductility at room temperature and a rather high fracture strength of about 2.5 GPa. Deformation of heat-treated Al3Ti-X alloys (larger grain sizes) produces plastic deformation with dislocation activity and lower flow stresses ( similar to 1 GPa). (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 12 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000176762600030 L2 - intermetallic materials;mechanical alloying;nanocrystalline materials;mechanical properties;DEFORMATION MECHANISMS; LAMELLAR; DUCTILITY; COHERENCY; CRYSTALS; FRACTURE; BEHAVIOR SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2002 ;329():196-205 4989 UI - 9814 AU - Caleyo F AU - Baudin T AU - Penelle R AD - IPN, ESIQIE, Dept Ingn Met, Labs Pesados Met, Mexico City 07738, DF, MexicoUniv Paris 11, Lab Physicochim Etat Solide, CNRS, UMR 8648, F-91405 Orsay, FranceCaleyo, F, IPN, ESIQIE, Dept Ingn Met, Labs Pesados Met, UPALM Edif 7, Mexico City 07738, DF, Mexico TI - Study of the development of the cube texture in Fe-50%Ni during recrystallization and normal grain growth AB - The development of the cube texture has been investigated in a Fe-50% Ni alloy undergoing recrystallization and normal grain growth by means of orientation imaging microscopy (OIM(TM))(b) and bulk texture measurements (X-ray diffraction). It is shown that both the oriented nucleation and the oriented growth mechanisms are responsible for the strengthening of the cube texture in the early stages of recrystallization in this alloy. The increase in the cube texture in the intermediate stages of recrystallization is mainly related to the high differentials in stored energy associated with cube grains. These experimental results are corroborated by way of a Monte-Carlo simulation of recrystallization based on data derived by OIM of the investigated alloy at its earliest recrystallization stages. The primary mechanism responsible for the development of the cube texture during grain growth relies on the preferential migration of the high-angle grain boundaries linked to cube grains which results from the advantage in number and size shown by cube grains when recrystallization is complete MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 1286-0042 UR - ISI:000179169500001 L2 - ORIENTATION DISTRIBUTION FUNCTION; POLE FIGURES; SIMULATION; BOUNDARIES; DIFFRACTION; DEFORMATION; MECHANISM SO - European Physical Journal-Applied Physics 2002 ;20(2):77-89 4990 UI - 10872 AU - Caleyo F AU - Baudin T AU - Penelle R AD - IPN, ESIQIE, Dept Ingn Met, Dept Pesados Met, Mexico City 07738, DF, MexicoUniv Paris 11, UMR CNRS 8648, Lab Phys Chim Etat Solide, F-91405 Orsay, FranceCaleyo, F, IPN, ESIQIE, Dept Ingn Met, Dept Pesados Met, UPALM Edif 7, Mexico City 07738, DF, Mexico TI - Monte Carlo simulation of recrystallization in Fe-50%Ni starting from EBSD and bulk texture measurements AB - An improved Monte Carlo approach for simulation of recrystallization from experimental data is presented. The orientation and stored energy maps derived by orientation imaging microscopy and the X-ray bulk texture of a Fe-50%Ni alloy are used as input data, A realistic description of the dependence of grain boundary properties on misorientation is used to simulate the nucleation and growth of the new recrystallized grains. (C) 2002 Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000176309100001 L2 - FeNi alloys;simulation;recrystallization;Monte Carlo;EBSD;texture;GROWTH SO - Scripta Materialia 2002 ;46(12):829-835 4991 UI - 10545 AU - Callen E AU - Ramirez MJ AU - Creus A AU - Marcos R AU - Frias S AU - Molina B AU - Badell I AU - Olive T AU - Ortega JJ AU - Surralles J AD - Univ Autonoma Barcelona, Dept Genet & Microbiol, Grp Mutagenesis, E-08193 Barcelona, SpainInst Nacl Pediat, Cytogenet Lab, Mexico City, DF, MexicoSt Pau Hosp, Dept Paediat, Bone Marrow Transplantat Unit, Barcelona, SpainVall Hebron Hosp, Serv Paediat Hematol Oncol, Bone Marrow Transplantat Unit, Barcelona, SpainSurralles, J, Univ Autonoma Barcelona, Dept Genet & Microbiol, Grp Mutagenesis, E-08193 Barcelona, Spain TI - The clastogenic response of the 1q12 heterochromatic region to DNA cross-linking agents is independent of the Fanconi anaemia pathway AB - Fanconi anaemia (FA) is a rare genetic syndrome of cancer susceptibility characterized by spontaneous and induced chromosome fragility, especially after treatment with cross-linking agents. Recent investigations showed interactions between FA proteins and chromatin remodelling factors. To investigate a potential uneven distribution of the FA pathway through the human genome depending on chromatin conformation, we have analysed chromosome breakage in the largest constitutively heterochromatic region in the human genome, the 1q12 band, in lymphocytes from FA patients, carriers and healthy controls after treatment with the cross-linking agents mitomycin-C (MMC) and diepoxybutane (DEB). As expected, a higher level of MMC-induced cytotoxicity and chromosome breakage was observed in cells from FA patients when compared with normal controls and carriers. However, the increase in 1q12 breakage after increasing concentrations of MMC was of a similar magnitude in FA patients, carriers and controls. Similarly, DEB induced a high level of overall genome chromosome fragility in cells from FA patients when compared with controls with no parallel increase in chromosome breaks specifically involving the heterochromatic band 1q12. We therefore conclude that, unlike the overall genome, the sensitivity of chromosome 1 constitutive heterochromatin to the chromosome breaking activity of cross-linking agents is independent of a functional FA pathway, indicating that the action of the FA pathway is unevenly distributed through the human genome MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Oncology U5 - J;Article AV - English IS - 0143-3334 UR - ISI:000177231000002 L2 - TRANSCRIPTION-COUPLED REPAIR; IN-SITU HYBRIDIZATION; ANEMIA PROTEINS; CHROMATIN; BRCA1; LYMPHOCYTES; BREAKAGE; CANCER; DAMAGE; CELLS SO - Carcinogenesis 2002 ;23(8):1267-1271 4992 UI - 10598 AU - Calme S AU - Desrochers A AU - Savard JPL AD - Univ Laval, Fac Foresterie & Geomat, Ctr Rech Biol Forestiere, St Foy, PQ G1K 7P4, CanadaColegio Frontera Sur, Div Conservac Biodiversidad, Chetumal 77000, Quintana Roo, MexicoCanadian Wildlife Serv, St Foy, PQ G1V 4H5, CanadaCalme, S, Univ Laval, Fac Foresterie & Geomat, Ctr Rech Biol Forestiere, St Foy, PQ G1K 7P4, Canada TI - Regional significance of peatlands for avifaunal diversity in southern Quebec AB - Altough peatlands in southern Quebec are facing increasing pressure, neither specific nor substantial protection measures have been implemented, partly due to a lack of information on this ecosystem, We determined the contribution of peatlands to bird regional diversity by measuring the difference between peatland and associated regional avifaunas. We sampled 112 peatlands located along the Saint Lawrence River during one breeding season. We used data on, regional nesting bird assemblages from the Quebec breeding bird atlas. Peatland bird species contrasted increasingly with regional avifauna from north to south or from undisturbed to managed landscapes. Of the 17 bird species found significantly more often in peatlands than in surroundings, some preferred peatlands in the whole study area and others preferred peatlands only in particular regions. Peatland avifaunas within regions were more similar to each other than to their regional avifauna, and differences between regions probably reflected changes in peatland physiognomy. We conclude that peatlands contribute to enrich local and regional avian diversity, particularly in the lowlands of the Saint Lawrence River, where industrial pressure on peatlands is highest. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Quintana Roo PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000177231300002 L2 - conservation;peatland;bird distribution;atlas;Dendroica palmarum;Melospiza lincolnii SO - Biological Conservation 2002 ;107(3):273-281 4993 UI - 10965 AU - Calonge A AU - Caus E AU - Bernaus JM AU - Aguilar M AD - Univ Alcala de Henares, Dept Geol, Alcala De Henares, SpainUniv Autonoma Barcelona, Dept Geol, Bellaterra 08193, SpainInst Mexicano Petr, Mexico City 07730, DF, MexicoCalonge, A, Univ Alcala de Henares, Dept Geol, Alcala De Henares, Spain TI - Praealveolina (Foraminifera) species: a tool to date Cenomanian platform sediments AB - The comparison of super-posed praealveolinid assemblages from the well exposed outcrops in the Iberian Range and the Pyrenees with Prealveolina species from the type localities in Reichel's collection have allowed us to evaluate the stratigraphical range of each species. The species Praealveolina iberica, P. pennensis and P. debilis successively replace each other from Early to Mid Cenomanian; they have been correlated with Mantelliceras mantelli and Acanthoceras rotomagense ammonite zones, and with Rotalipora brotzeni and the lower part of the R. cushmanni planktonic foraminiferal zones. Praealveolina brevis and P. tenuis appear successively during the Upper Cenomanian, but the range of P. tenuis may overlap with the one of P. brevis in the Early Upper Cenomanian; they have been correlated with Calycoceras naviculare and Metoicoceras geslinianum and with R. cushmannni zone. P simplex occurs together with F. brevis and P. tenuis in the Upper Cenomanian. The stratigraphic relationship of P. cretacea and P. lata with the species treated in this paper have not been established yet because they were not found in the studied sediments MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MICROPALEONTOLOGY PRESS RP - NOT IN FILE U3 - TC 2 U4 - Paleontology U5 - J;Article AV - English IS - 0026-2803 UR - ISI:000176069100003 L2 - BASIN; SPAIN SO - Micropaleontology 2002 ;48(1):53-66 4994 UI - 11532 AU - Calvet N AU - D'Alessio P AU - Hartmann L AU - Wilner D AU - Walsh A AU - Sitko M AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoAmer Museum Nat Hist, New York, NY 10024, USAMax Planck Inst Radioastron, D-53121 Bonn, GermanyUniv Cincinnati, Dept Phys, Cincinnati, OH 45221, USACalvet, N, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - Evidence for a developing gap in a 10 Myr old protoplanetary disk AB - We have developed a physically self-consistent model of the disk around the nearby 10 Myr old star TW Hya that matches the observed spectral energy distribution and 7 mm images of the disk. The model requires both significant dust-size evolution and a partially evacuated inner disk region, as predicted by theories of planet formation. The outer disk, which extends to at least 140 AU in radius, is very optically thick at infrared wavelengths and quite massive (similar to0.06 M-.) for the relatively advanced age of this T Tauri star. This implies long viscous and dust evolution timescales, although dust must have grown to sizes of the order of similar to1 cm to explain the submillimeter and millimeter spectral slopes. In contrast, the negligible near-infrared excess emission of this system requires that the disk be optically thin inside. 4 AU. This inner region cannot be completely evacuated; we need similar to0.5 lunar mass of similar to1 mum particles remaining to produce the observed 10 mum silicate emission. Our model requires a distinct transition in disk properties at 4 AU separating the inner and outer disks. The inner edge of the optically thick outer disk must be heated almost frontally by the star to account for the excess flux at mid-infrared wavelengths. We speculate that this truncation of the outer disk may be the signpost of a developing gap due to the effects of a growing protoplanet; the gap is still presumably evolving because material still resides in it, as indicated by the silicate emission, the molecular hydrogen emission, and the continued accretion onto the central star ( albeit at a much lower rate than typical of younger T Tauri stars). Thus, TW Hya may become the Rosetta stone for our understanding of the evolution and dissipation of protoplanetary disks MH - Germany MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 128 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000174625700044 L2 - accretion, accretion disks;circumstellar matter;stars : formation;stars : pre main-sequence;T-TAURI STARS; INTERSTELLAR SILICATE MINERALOGY; SPECTRAL ENERGY-DISTRIBUTIONS; CIRCUMSTELLAR DISKS; ACCRETION DISKS; PROTOSTELLAR DISKS; HYDRAE ASSOCIATION; OPTICAL-CONSTANTS; GIANT PLANETS; SOLAR NEBULA SO - Astrophysical Journal 2002 ;568(2):1008-1016 4995 UI - 9822 AU - Camacho-Bagado GA AU - Santiago P AU - Marin-Almazo M AU - Espinosa M AU - Romero ET AU - Murgich J AU - Lugo VR AU - Lozada-Cassou M AU - Jose-Yacaman M AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAInst Venezolano Invest Cient, Dept Quim, Caracas 1020A, VenezuelaCtr Nucl Dr Nabor Carrillo Flores, Inst Nacl Invest Nucl, Mexico City 52045, DF, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoJose-Yacaman, M, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - Fullerenic structures derived from oil asphaltenes AB - The handling and properties of heavy oils are becoming an increasingly important problem. Even though petroleum is the widest used source of fuels and it has been studied for decades, its complex nature is still an enigma in several ways. A reasonable approach to a definition of a crude oil is a colloidal fluid formed by several dispersed phases from gases (light hydrocarbons) to solids (heavy paraffins and asphaltenes). Through all these years of research, applications have been found for almost all classes of components in crude oil except for some of the solid phases such as asphaltenes. Very heavy petroleum is a non-newtonian liquid with a viscosity of approximate to 10(6) Poise, and an average molecular weight of 600 amu. The solids that are toluene soluble but heptane insoluble are called asphaltenes and are the most aromatic fraction with the highest molecular weight of unconverted petroleum. In the present work, we applied high resolution transmission electron microscopy (HREM) and energy dispersive spectrometry (EDS) in the study of asphaltenes. It was found that when the asphaltenes are well separated from the resins the sample consists of a carbon structure containing S, V, Si, related to fullerenic carbon. During observation in the microscope it was possible to see the formation of fullerenes such as onions and C-240 @ C-60 structures. The fact that they decomposed under further irradiation suggests that they are metastable structures. Since the heteroatoms are still present they are likely to cause instability to the structure. Not only does our result indicate the possibility of obtaining fullerenes from crude oil but it also suggests the asphaltene molecule, when it is resin free, might be a precursor of fullerenic structures. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000179347900003 L2 - carbon onions;fullerene;graphitization;transmission electron microscopy;CARBON CLUSTERS; C-60 SO - Carbon 2002 ;40(15):2761-2766 4996 UI - 11979 AU - Camacho-Camacho C AU - Contreras R AU - Noth H AU - Bechmann M AU - Sebald A AU - Milius W AU - Wrackmeyer B AD - Univ Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyUniv Bayreuth, Bayer Geoinst, D-95440 Bayreuth, GermanyUniv Munich, Dept Chem, D-81377 Munich, GermanyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv A Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoWrackmeyer, B, Univ Bayreuth, Anorgan Chem Lab, POB 101251, D-95440 Bayreuth, Germany TI - Molecular structures of organotin tropolonato complexes with tin coordination numbers 5-7, seen by single-crystal X-ray diffraction and solid- and solution-state Sn-119 NMR AB - Organotin tropolonato complexes of the type R3Sn(trop) 1 [R = Bu (b), Ph (c),] R2Sn(trop)(2) 2 [R = Me (a), Bu (b), Ph (c)] and RSn(trop)(3) 3 [R = Bu (b), Ph (c)] were studied by single-crystal X-ray diffraction (1c, 2a, b, 3b), C-13 and Sn-119 MAS NMR and Sn-119 NMR in solution. The tin coordination numbers from 5 to 7, as determined for the solid state, are retained in solution. The different distorted octahedral surroundings (cis-like arrangement of the methyl groups in 2a; trans-like arrangement of the butyl groups and weak intermolecular association in 2b) of the tin atoms in solid compounds 2 are reflected both by the Sn-119 chemical shift anisotropies and the magnitude of the coupling constants \(1)/(Sn-117/119,C-13)\. The molecular structures of 2a and 2b become more similar to each other in solution, as indicated by differences in the isotropic Sn-119 chemical shifts in solution and in the solid state, and even more obvious by changes in the magnitude of the corresponding coupling constants \(1)/(Sn-117/119,C-13)\. Copyright (C) 2001 John Wiley Sons, Ltd MH - Germany MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000173234900004 L2 - NMR;C-13 NMR;Sn-119 NMR;organotin tropolonato complexes;single-crystal X-ray diffraction;isotope-induced chemical shifts;POLARIZATION TRANSFER; ENHANCEMENT; SPECTRA; C-13; ANGLE; SN SO - Magnetic Resonance in Chemistry 2002 ;40(1):31-40 4997 UI - 9265 AU - Camacho-Villasana YM AU - Ochoa-Alejo N AU - Walling L AU - Bray EA AD - Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521, USAIPN, Ctr Invest & Estudios Avanzados, Unidad Biotecnol & Ingn Genet Plantas, Dept Ingn Genet Plantas,CINVESTAV,Unidad Irapuato, Irapuato 36500, Gto, MexicoBray, EA, Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA TI - An improved method for isolating RNA from dehydrated and nondehydrated chili pepper (Capsicum annuum L.) plant tissues AB - High-quality RNA is important in studying gene expression. This report describes an improved method for isolating intact purified RNA from dehydrated organs of chili pepper plants. Common RNA extraction protocols have produced poor yields because dehydrated leaves accumulate polysaccharides and RNases. Our protocol is based on a guanidine thiocyanate extraction combined with additional purification steps using butanol and the ionic detergent CTAB (cetyltrimethylammonium bromide). Using this protocol, RNA yields ranged from 40-70 mug of total RNA per 200 mg of fresh tissue. This method can be adapted to large-scale isolations, allowing the recovery of larger amounts of intact RNA (up to 250 mug per gram of fresh tissue) MH - USA MH - Mexico|Guanajuato PB - ATHENS: INT SOC PLANT MOLECULAR BIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Biochemical Research Methods;Plant Sciences U5 - J;Article AV - English IS - 0735-9640 UR - ISI:000180677100009 L2 - EXTRACTION SO - Plant Molecular Biology Reporter 2002 ;20(4):407-414 4998 UI - 9868 AU - Camacho J AU - Cantarero A AU - Hernandez-Calderon I AU - Gonzalez L AD - Univ Valencia, Inst Sci Mat, E-46071 Valencia, SpainInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoCSIC, CNM, Inst Microelect Madrid, E-28760 Madrid, SpainUniv Politecn Cartagena, Dept Fis Aplicada, E-30202 Murcia, SpainCamacho, J, Univ Valencia, Inst Sci Mat, POB 22085, E-46071 Valencia, Spain TI - Raman spectroscopy and photoluminescence of ZnTe thin films grown on GaAs AB - We report resonant Raman scattering and photoluminescence (PL) measurements on two ZnTe thin films grown by molecular-beam epitaxy on GaAs substrates with thicknesses around 0.5 and 1.0 mum. The data have been obtained by using the different excitation energies of an Ar+ laser to distinguish Raman from PL and analyze resonant effects. The characteristic features of the low-temperature PL spectra are the light and heavy free exciton emissions, split due to the thermal strain effect, followed by several phonon replicas of these lines. Moreover, longitudinal and transversal polariton splittings of heavy excitons are clearly observed. Their reduced masses have been obtained from the exciton binding energies. Room and low-temperature Raman spectra show, besides the typical longitudinal optical (LO) multiphonon emissions, forbidden zone-center transverse optical (TO)+(n-1)LO phonon combinations, which yield an accurate value for the LO and TO phonon energies. The breakdown of the selection rules is attributed to surface faceting. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000178987200065 L2 - VAPOR-PHASE EPITAXY; OPTICAL-PROPERTIES; MOLECULAR-BEAM; STRAIN; LAYERS; DEPENDENCE; PRESSURE; SPECTRA SO - Journal of Applied Physics 2002 ;92(10):6014-6018 4999 UI - 11388 AU - Camacho J AU - Loa I AU - Cantarero A AU - Hernandez-Calderon I AD - Univ Valencia, Inst Ciencia Mat, E-46071 Valencia, SpainMax Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoCamacho, J, Univ Valencia, Inst Ciencia Mat, POB 2085, E-46071 Valencia, Spain TI - Temperature dependence of Raman scattering and luminescence of the disordered Zn0.5Cd0.5Se alloy AB - We report on luminescence and Raman scattering measurements of zineblende Zn0.5Cd0.5Se thin film grown by molecular beam epitaxy. From the luminescence data of the exciton peak, the dependence of the energy gap with temperature [dE(g)/dT = (4.35 +/- 0.01) X 10(-4) meV/K] and zero-temperature phonon renormalization energy (DeltaE(0) = 30 +/- 1 meV) have been obtained. The broadening of the excitonic emission as the temperature increases is mainly due to scattering processes with longitudinal optical phonons and residual ionized impurities. Raman scattering shows a multiphonon structure, which depends on the temperature. At low temperatures, up to the fifth-order phonon peaks appear due to resonant effects. The increase in the Raman intensity as the temperature decreases is discussed in terms of a model which gives a very good quantitative agreement of the relative intensity between successive phonon peaks. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000174933200008 L2 - II-VI ternary alloys;Raman spectroscopy;photoluminescence;CdSe;ZnSe;QUANTUM-WELLS; OPTICAL-PROPERTIES; SEMICONDUCTORS; TERNARY; ZNSE; SUPERLATTICES; ZNXCD1-XSE; LINEWIDTHS; PHONONS; FILMS SO - Microelectronics Journal 2002 ;33(4):349-353 5000 UI - 10732 AU - Camacho SPD AU - Willms K AU - Ramos MZ AU - Otero MDD AU - Nawa Y AU - Akahane H AD - Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoUniv Autonoma Sinaloa, Fac Ciencias Quim Biol, Culiacan, Sinaloa, MexicoMiyazaki Med Coll, Miyazaki 88916, JapanFukuoka Univ, Sch Med, Fukuoka 81401, JapanWillms, K, Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Edif A Ler Piso,Cd Univ, Mexico City 04510, DF, Mexico TI - Morphology of Gnathostoma spp. isolated from natural hosts in Sinaloa, Mexico AB - Gnathostomosis is an emerging public health problem in Sinaloa, Mexico, where an increasing number of human cases have been diagnosed since 1989. The present study was carried out to determine the presence of the parasite in other natural hosts from the area. Birds, fish, opossums and raccoons were captured from local dams and lagoons. The flesh from bird and fish specimens was ground and examined under a 100 W light bulb. Larvae were processed for light and electron microscopy. A total of 368 advanced stage 3 (AL3) larvae were found in 300 ichthyophagous birds, with Egretta alba exhibiting the highest infection rate. A total of 4,156 fish were examined, of which six species were infected with AL3 larvae: Arius guatemalensis (blue sea catfish), Dormitator latifrons (Pacific fat sleeper), Gobiomorus sp. (fat sleeper), Oreochromis sp. (Nile tilapia), Cichlasoma beani (Sinaloan cichlid or green guapote) and Eleotris picta (spotted sleeper). Twenty larvae from birds were used to infect domestic cats and dogs. Young adult worms were recovered from the stomach of a cat with a 17 day infection and from a dog with a 35 day infection. Larvae exhibited four rows of hooklets on the head bulb, whereas the young adults had nine rows of hooklets. The cuticular spines of adult worms along the body evolved from single-pointed, bi- or trifurcated spines. Nuclei were counted in intestinal cells examined in serial sections of larvae recovered from a great heron and a fish, in which a mean of 1.6 nuclei/cell was found, corresponding to data published for Gnathostoma binucleatum. Although the external morphology of both larvae and adults are in agreement with previous descriptions of Gnathostoma spinigerum, the results indicate that natural host infections in Sinaloa may be caused by either G. spinigerum or G. binucleatum MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000176777700008 L2 - NEMATODA SO - Parasitology Research 2002 ;88(7):639-645 5001 UI - 9431 AU - Camargo-Ricalde SL AU - Dhillion SS AU - Grether R AD - Agr Univ Norway, Dept Biol & Nat Conservat, N-1432 As, NorwayUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Biol & Salud, Dept Biol, Mexico City 09340, DF, MexicoCamargo-Ricalde, SL, Agr Univ Norway, Dept Biol & Nat Conservat, POB 5014, N-1432 As, Norway TI - Community structure of endemic Mimosa species and environmental heterogeneity in a semi-arid Mexican valley AB - In this paper we analyse six communities with seven Mimosa species in the Tehuacan-Cuicatlan valley, Mexico. All species are endemic to Mexico and four are endemic to the valley. Mimosa species are found in (1) the 'matorral xerofilo' (arid tropical scrub): Mimosa calcicola, M. lacerata, M. luisana, M. polyantha and M. purpusii, and (2) the 'selva baja caducifolia', (tropical deciduous forest): M. adenantheroides, Mimosa texana var. filipes. Most of them occur in similar soil environments, while M. polyantha and M. calcicola establish in particular soil conditions and only M. luisana establishes in two different sites showing a wider range of adaptation to soil characteristics. The communities studied include 24 plant families, 51 genera and ca. 70 species (5% of the total flora estimated in the valley). Heterogeneity was found among the communities. Our results point to the replacement of 'matorral xerofilo' and 'selva baja caducifolia' by 'matorral espinoso' (thorny scrub). Thorny species (e.g. Acacia cochliacantha, Mimosa spp.) are becoming the dominant/codominant elements in the communities. Within the communities, Mimosa species have a significant influence on soil pH, organic matter and electrical conductivity values. These species contribute to ameliorate soil nutrient conditions (OM, N-tot, P, Ca, Mg, Na and K contents) as well as other environmental factors (e.g. temperature, shade) under their canopy in degraded plant communities and may serve as,resource islands' MH - Mexico|Distrito Federal MH - Norway PB - LANNA: OPULUS PRESS UPPSALA AB RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1100-9233 UR - ISI:000180300000010 L2 - arid;biodiversity;Fabaceae;resource island;CACTUS NEOBUXBAUMIA-TETETZO; NURSE PLANT; GERMINATION; LUISANA; DESERT; SHRUBS; PIGRA SO - Journal of Vegetation Science 2002 ;13(5):697-704 5002 UI - 9037 AU - Camart JF AU - del-Muro-Cuellar B AU - Malabre M AD - IPSIS, Ingenierie Signaux & Syst, F-35510 Cesson Sevigne, FranceInst Mexicano Petr, Program Matemat Aplicadas & Computac, Mexico City 07730, DF, MexicoIRCCyN, Inst Rech Commun & Cyberernet Nantes, CNRS, UMR 6597, F-44321 Nantes, FranceCamart, JF, IPSIS, Ingenierie Signaux & Syst, 3 Sq Chene Germain, F-35510 Cesson Sevigne, France TI - Fixed poles of H-2 optimal control by measurement feedback AB - This paper is concerned with the flexibility in the closed loop pole location when solving the H-2 optimal control problem (also called the H-2 optimal disturbance attenuation problem) by proper measurement feedback. It is shown that there exists a precise and unique set of poles which is present in the closed loop system obtained by any measurement feedback solution of the H-2 optimal control problem. These "H-2 optimal fixed poles" are characterized in geometric as well as structural terms. A procedure to design H-2 optimal controllers which simultaneously freely assign all the remaining poles, is also provided MH - France MH - Mexico|Distrito Federal PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000181338500011 L2 - GEOMETRIC APPROACH; DESIGN SO - Kybernetika 2002 ;38(5):631-642 5003 UI - 9405 AU - Camorlinga MP AU - Celis-Cruz C AU - Romero J AU - Ortiz M AU - Lopez-Corella E AU - Perez-Perez G AU - Coria-Jimenez R AD - Inst Mexicano Seguro Social, Mexico City, DF, MexicoINP, Mexico City, DF, MexicoNYU, Sch Med, New York, NY, USA TI - Simultaneous experimental colonization of Eriones unguiculatus (Mongolian gerbil) with PAI+ and PAI- Helicobacter pylori strains MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000178344100175 SO - Gut 2002 ;51():A49-A49 5004 UI - 9689 AU - Campa-Molina J AU - Blanco O AU - Correz-Gomez A AU - Czank M AU - Castellanos-Guzman AG AD - Univ Guadalajara, Lab Invest Mat, DIP CUCEI, Guadalajara 44281, Jalisco, MexicoCicese CCMC Unam, Ensenada 22800, Baja California, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCastellanos-Guzman, AG, Univ Guadalajara, Lab Invest Mat, DIP CUCEI, Apdo Postal 2-638, Guadalajara 44281, Jalisco, Mexico TI - Electron and light microscopy studies on the domain structures of Zn3B7O13Cl,Zn3B7O13Br and Zn3B7O13I ferroic boracites AB - The domain structures of Zn3B7O13Cl, Zn3B7O13Br and Zn3B7O13I boracite single crystals were studied by means of polarized light in conjunction with electron microscopy. Single crystals of the three compositions were grown by chemical transport reactions in closed quartz ampoules, at a temperature of 900 degreesC and were examined by polarizing optical microscopy (PLM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). For both PLM and SEM, the same as-grown samples were used without having to resort to metallization of the crystal faces. For TEM the single crystals were crushed and mounted on holey carbon films. Comparative electron microscope images were useful for revealing the domain structure of these ferroelectric/ferroelastic materials previously observed between the crossed polars of an optical microscope. X-ray diffraction analysis of the pulverized crystals was performed for this triad of halogen boracites containing zinc as a common metal MH - Germany MH - Mexico|Baja California MH - Mexico|Jalisco PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Microscopy U5 - J;Article AV - English IS - 0022-2720 UR - ISI:000179578600006 L2 - boracite crystals;domains;ferroelasticity;ferroelectricity;phase transitions;polarized-light microscopy;transmission and scanning electron microscopy;CRYSTAL-STRUCTURES; YBA2CU3O7-DELTA SO - Journal of Microscopy-Oxford 2002 ;208():201-211 5005 UI - 9714 AU - Campos J AU - Eskilsson K AU - Nylander T AU - Svendsen A AD - Lund Univ, Ctr Chem & Chem Engn, SE-22100 Lund, SwedenUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Surface Chem, SE-11486 Stockholm, SwedenNovozymes AS, DK-2880 Bagsvaerd, Denmark TI - On the interaction between adsorbed layers of monoolein and the lipase action on the formed layers AB - We used the Surface Force Apparatus (SFA) and ellipsometry techniques to study the interaction forces and the adsorption behavior of monoolein (MO), respectively. MO was adsorbed from water to a hydrophobised mica or silica surface. In addition the effect of added lipase, Thermomyces (Humicula) lanuginosa lipase (TLL), to an adsorbed layer of MO was investigated. The force versus distance curves between two MO covered surfaces feature a strong repulsive interaction beneath 400 A. The range of the repulsive force decreases, however, with the number of approaches. No adhesion was observed, provided that the surfaces were not taken to hydrophobic contact. The surface separation at MO-MO contact was determined to about 55 Angstrom This means a layer thickness of about 27 Angstrom, which is comparable to the thickness (25 Angstrom) determined by ellipsometry. The repulsive force may arise from compression of a cubic phase of MO. This phase are suggested to form between the surfaces when they approach close contact due to capillary induced phase separation (CIPS) from the saturated MO solution. The repulsive force changes significantly with time after addition of TLL (concentration of about 1 x 10(-8) M). In contrast to the force curves recorded before adding TLL, the surfaces do not seem to be completely covered with MO as we always observed an attractive force (inward jump) of similar range as was observed between pure OTE surfaces. Ellipsometry measurement of TLL action on MO covered hydrophobic surface reveals a significant and sharp decrease of the amounts adsorbed. Furthermore, the rate of decrease and reduction in adsorbed amount increased with TLL concentration. (C) 2002 Elsevier Science B.V. All rights. reserved MH - Denmark MH - Mexico|Distrito Federal MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Biophysics;Chemistry, Physical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0927-7765 UR - ISI:000179487200017 L2 - Thermomyces (Humicula) lanuginosa lipase;monoolein;adsorption;lipase action;ellipsometry;surface forces;AIR-WATER-INTERFACE; HYDROPHOBIC SURFACES; HUMICOLA-LANUGINOSA; PHASE-BEHAVIOR; SYSTEM; FILMS; ELLIPSOMETRY; ADSORPTION; ATTRACTION; FORCES SO - Colloids and Surfaces B-Biointerfaces 2002 ;26(1-2):172-182 5006 UI - 11309 AU - Cancino J AU - Sanchez-Sotomayor V AU - Castellanos R AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja Calif Sur, BoliviaReserva Biosiera El Vizcaino, Guerrero Negro 23940, Baja Calif Sur, MexicoCancino, J, Ctr Invest Biol Noroeste, Apartado Postal 128, La Paz 23000, Baja Calif Sur, Bolivia TI - Alternative capture technique for the peninsular pronghorn MH - Bolivia MH - Mexico|Baja California Sur PB - BETHESDA: WILDLIFE SOC RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Zoology U5 - J;Article AV - English IS - 0091-7648 UR - ISI:000175200100034 SO - Wildlife Society Bulletin 2002 ;30(1):256-258 5007 UI - 9241 AU - Candela J AU - Sheinbaum J AU - Ochoa J AU - Badan A AU - Leben R AD - CICESE, Dept Oceanog Fis, Ensenada, Baja California, MexicoUniv Colorado, Dept Aerosp Engn Sci, CCAR, Boulder, CO 80309, USACandela, J, CICESE, Dept Oceanog Fis, Apdo Postal 2732, Ensenada, Baja California, Mexico TI - The potential vorticity flux through the Yucatan Channel and the Loop Current in the Gulf of Mexico AB - [1] Two-year-long time series of current and density structure measurements across the Yucatan Channel's main section allow the calculation of the time-dependent potential vorticity flux between the Gulf of Mexico and the Caribbean Sea, which is characterized by alternating periods of positive (cyclonic) and negative (anti-cyclonic) vorticity influx. Periods of negative cumulative vorticity influx are related to the Loop Current extending into the Gulf of Mexico, whereas periods of positive cumulative vorticity influx relate to a Loop Current retraction, sometimes coincident with the shedding of an anti-cyclonic eddy MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000180617000016 L2 - VARIABILITY SO - Geophysical Research Letters 2002 ;29(22): 5008 UI - 9976 AU - Canseco-Marquez L AU - Mendelson JR AU - Gutierrez-Mayen G AD - Utah State Univ, Dept Biol, Logan, UT 84322, USANatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Dept Biol Evolut, Mexico City 04510, DF, MexicoBenemerita Univ Autonoma Puebla, Escuela Biol, Lab Herpetol, Puebla 72570, MexicoMendelson, JR, Utah State Univ, Dept Biol, Logan, UT 84322, USA TI - A new species of large Tantilla (Squamata : Colubridae) from the Sierra Madre oriental of Puebla, Mexico AB - We describe a new large species of Tantilla, from the Sierra Norte region of the Sierra Madre Oriental of Puebla, Mexico. This species most closely resembles Tantilla schistosa in color pattern, but differs by being much larger in size and having different scutellation. It differs from all other species of Mexican Tantilla by having a uniformly dark brown dorsum and head, and a pale cream venter MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000178924400011 L2 - colubridae;Mexico;new species;Puebla;Tantilla robusta;TAENIATA GROUP; SERPENTES; CHIAPAS SO - Herpetologica 2002 ;58(4):492-497 5009 UI - 11033 AU - Canseco-Marquez L AU - Mendelson JR AU - Gutierrez-Mayen G AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoUtah State Univ, Dept Biol, Logan, UT 84321, USABenemerita Univ Autonoma Puebla, Escuela Biol, Lab Herpetol, Puebla 72570, MexicoCanseco-Marquez, L, Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, AP 70-399, Mexico City 04510, DF, Mexico TI - A new species of Hyla (Anura : Hylidae) from the Mixteca Alta, Oaxaca, Mexico AB - We describe a new species, genus Hyla, frown the oak, forests of the Mixteca Alta of northwest Oaxaca. We tentatively place this species in the phenetic Hyla bistincta group. The new species is similar in coloration to species of the Hyla, eximia group, but differs from them by lacking a quadratojugal MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000175900800012 L2 - Amphibia Anura;Hylidae;Hula ameibothalame;new species;Mixteca Alta;Oaxaca;Mexico SO - Herpetologica 2002 ;58(2):260-269 5010 UI - 10316 AU - Cansino S AU - Maquet P AU - Dolan RJ AU - Rugg MD AD - Natl Autonomous Univ Mexico, Fac Psychol, Lab Neurocognit, Mexico City 03421, DF, MexicoUniv Liege, Cyclotron Res Ctr, Liege, BelgiumUniv Coll London, Dept Psychol, London, EnglandUniv Coll London, Inst Cognit Neurosci, London, EnglandUniv Coll London, Inst Neurol, Wellcome Dept Cognit Neurol, London, EnglandCansino, S, Natl Autonomous Univ Mexico, Fac Psychol, Lab Neurocognit, Apartado Postal 25-308, Mexico City 03421, DF, Mexico TI - Brain activity underlying encoding and retrieval of source memory AB - Neural activity elicited during the encoding and retrieval of source information was investigated with event-related functional magnetic resonance imaging (efMRI). During encoding, 17 subjects performed a natural/artificial judgement on pictures of common objects which were presented randomly in one of the four quadrants of the display. At retrieval, old pictures were mixed with new ones and subjects judged whether each picture was new or old and, if old, indicated in which quadrant it was presented at encoding. During encoding, study items that were later recognized and assigned a correct source judgement elicited greater activity than recognized items given incorrect judgements in a variety of regions, including right lateral occipital and left prefrontal cortex. At retrieval, regions showing greater activity for recognized items given correct versus incorrect source judgements included the right hippocampal formation and the left prefrontal cortex. These findings indicate a role for these regions in the encoding and retrieval of episodic information beyond that required for simple item recognition MH - Belgium MH - United Kingdom MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 83 U4 - Neurosciences U5 - J;Article AV - English IS - 1047-3211 UR - ISI:000178000600006 L2 - EVENT-RELATED FMRI; RECOGNITION MEMORY; EPISODIC RETRIEVAL; PREFRONTAL CORTEX; FUNCTIONAL MRI; RECOLLECTION; SUCCESS; DISSOCIATION; HIPPOCAMPUS; FAMILIARITY SO - Cerebral Cortex 2002 ;12(10):1048-1056 5011 UI - 11490 AU - Cantrell RP AU - Reeves TG AD - Int Maize & Wheat Improvement Ctr CIMMYT, Mexico City 06600, DF, MexicoInt Rice Res Inst, Manila, PhilippinesCantrell, RP, Int Rice Res Inst, DAPO Box 7777, Manila, Philippines TI - The rice genome - The cereal of the world's poor takes center stage MH - Mexico|Distrito Federal MH - Philippines PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000174858800027 SO - Science 2002 ;296(5565):53-53 5012 UI - 10823 AU - Cantwell MI AU - Peiser G AU - Mercado-Silva E AD - Univ Calif Davis, Dept Vegetable Crops, Mann Lab, Davis, CA 95616, USAUniv Autonoma Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, Queretaro 76010, MexicoCantwell, MI, Univ Calif Davis, Dept Vegetable Crops, Mann Lab, Davis, CA 95616 USA TI - Induction of chilling injury in jicama (Pachyrhizus erosus) roots: changes in texture, color and phenolics AB - Storage of jicama roots at 10 degreesC resulted in characteristic chill-induced changes in pulp color (decreased L* values and increased chroma) and texture (increased distance to rupture) after 7-14 days. Discoloration or browning of the pulp occurred first in exterior pulp tissue and then progressed to-the interior tissue. Changes in texture during storage were similar in exterior and interior pulp tissues. Chill-induced color changes generally occurred before changes in texture. After 10 degreesC storage, transfer to 20 degreesC enhanced chill-induced changes in color, texture, and concentrations of phenolics. Roots stored at 13 degreesC for 6 weeks began to exhibit changes in pulp color but not in texture. Roots stored at 20 degreesC for 6 weeks had no color or textural changes although they lost about 40% of their fresh weight. Chill-induced browning was associated with increased concentrations of soluble phenolic compounds and increased phenylalanine ammonia lyase activity. Phenolic compounds in chilled jicama root had UV spectra similar to those of catechins, though ( +)-catechin and (-)-epicatechin were not present based on HPLC. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000176483900007 L2 - soluble phenolics;PAL;dry weight;weight loss;L* color value;chroma;transfer period;gradients in pulp;TEMPERATURES; QUALITY SO - Postharvest Biology and Technology 2002 ;25(3):311-320 5013 UI - 8914 AU - Cao WY AU - Munoz A AU - Palffy-Muhoray P AU - Taheri B AD - Kent State Univ, Inst Liquid Crystal, Kent, OH 44242, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoPalffy-Muhoray, P, Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA TI - Lasing in a three-dimensional photonic crystal of the liquid crystal blue phase II MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 78 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1476-1122 UR - ISI:000181498600020 L2 - BAND; LASERS; EMISSION SO - Nature Materials 2002 ;1(2):111-113 5014 UI - 11173 AU - Capovilla R AU - Guven J AU - Rojas E AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSyracuse Univ, Dept Phys, Syracuse, NY 13244, USACapovilla, R, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Hamiltonian Frenet-Serret dynamics AB - The Hamiltonian formulation of the dynamics of a relativistic particle described by a higher derivative action that depends both on the first and the second Frenet-Serret curvatures is considered from a geometrical perspective. We demonstrate how reparametrization covariant dynamical variables and their projections onto the Frenet-Serret frame can be exploited to provide not only a significant simplification of but also novel insights into the canonical analysis. The constraint algebra and the Hamiltonian equations of motion are written down and a geometrical interpretation is provided for the canonical variables MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000175433400019 L2 - RELATIVISTIC PARTICLE; W-SYMMETRY; CURVATURE; MODEL; TORSION; QUANTIZATION; LAGRANGIANS; RIGIDITY; STRINGS SO - Classical and Quantum Gravity 2002 ;19(8):2277-2290 5015 UI - 10933 AU - Capra L AU - Macias JL AU - Scott KM AU - Abrams M AU - Garduno-Monroy VH AD - Natl Autonomous Univ Mexico, Inst Geografia, Mexico City 04510, DF, MexicoUNAM, Inst Geofis, Mexico City, DF, MexicoCascades Volcano Observ, Vancouver, WA, USACALTECH, Jet Prop Lab, Pasadena, CA, USAUniv Michoacana San Nicolas Hidalgo, Morelia, MexicoCapra, L, Natl Autonomous Univ Mexico, Inst Geografia, Mexico City 04510, DF, Mexico TI - Debris avalanches and debris flows transformed from collapses in the Trans-Mexican Volcanic Belt, Mexico - behavior, and implications for hazard assessment AB - Volcanoes of the Trans-Mexican Volcanic Belt (TMVB) have yielded numerous sector and flank collapses during Pleistocene and Holocene times. Sector collapses associated with magmatic activity have yielded debris avalanches with generally limited runout extent (e.g. Popocatepetl, Jocotitlan, and Colima volcanoes). In contrast, flank collapses (smaller failures not involving the volcano summit), both associated and unassociated with magmatic activity and correlating with intense hydrothermal alteration in ice-capped volcanoes, commonly have yielded highly mobile cohesive debris flows (e.g. Pico de Orizaba and Nevado de Toluca volcanoes). Collapse orientation in the TMVB is preferentially to the south and northeast, probably reflecting the tectonic regime of active E-W and NNW faults, The differing mobilities of the flows transformed from collapses have important implications for hazard assessment. Both sector and flank collapse can yield highly mobile debris flows, but this transformation is more common in the cases of the smaller failures. High mobility is related to factors such as water content and clay content of the failed material, the paleotopography, and the extent of entrainment of sediment during flow (bulking). The ratio of fall height to runout distance commonly used for hazard zonation of debris avalanches is not valid for debris flows, which are more effectively modeled with the relation inundated area to failure or flow volume coupled with the topography of the inundated area. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000176143100006 L2 - Trans-Mexican Volcanic Belt;debris avalanche;cohesive debris flow;hazard assessment;DE-TOLUCA-VOLCANO; MOUNT-RAINIER; DEPOSITS; COLIMA; POPOCATEPETL; PLEISTOCENE; EVOLUTION; ORIZABA; FUTURE; LAHAR SO - Journal of Volcanology and Geothermal Research 2002 ;113(1-2):81-110 5016 UI - 11457 AU - Carabias-Martinez R AU - Rodriguez-Gonzalo E AU - Herrero-Hernandez E AU - Sanchez-San Roman FJ AU - Flores MGP AD - Univ Salamanca, Fac Quim, Dept Quim Analit Nutr & Bromatol, E-37008 Salamanca, SpainUniv Salamanca, Fac Geol, Dept Geol, E-37008 Salamanca, SpainUniv Autonoma Metropolitana Xochimilco, Div Ciencias Biol & Salud, Dept Prod Agr & Anim, Mexico City 04960, DF, MexicoCarabias-Martinez, R, Univ Salamanca, Fac Quim, Dept Quim Analit Nutr & Bromatol, Plaza Merced S-N, E-37008 Salamanca, Spain TI - Determination of herbicides and metabolites by solid-phase extraction and liquid chromatography - Evaluation of pollution due to herbicides in surface and groundwaters AB - A procedure based on solid-phase extraction (SPE) has been developed for the simultaneous preconcentration of three widely used herbicides and seven of their most common degradation products. The compounds studied were atrazine and its metabolites, desethylatrazine, desethyldesisopropylatrazine (DEDIA), 2-hydroxyatrazine, desethyl-2-hydroxyatrazine and desisopropyl-2-hydroxyatrazine (DIHA), terbutryne and its metabolite 2-hydroxyterbutylazine, and chlorotoluron and its metabolite 3-chloro-4-methylphenylurea. A HPLC system with diode array detection was used for the separation, identification and quantification of all these analytes. In the SPE preconcentration step, different types of sorbent were studied: C-18 on silica and polymeric sorbents (Oasis and LiChrolut EN), the best results being obtained with the styrene-divinylbenzene cartridge and when the elution was performed with methanol and ethyl acetate. The detection limits obtained were between 0.1 mug l(-1) for DIHA and DEDIA and 0.02 mug l(-1) for the other analytes. The method used permitted the determination of these herbicides in drinking water at the concentration levels demanded by current legislation. The proposed method was used to evaluate the presence and evolution with time of these herbicides and their degradation products in samples of surface and ground waters from agricultural zones of the provinces of Salamanca and Zamora (basins of the Rivers Guarena and Almar), Spain. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 30 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000174786200016 L2 - water analysis;environmental analysis;pesticides;ATRAZINE DEGRADATION PRODUCTS; TRACE-LEVEL DETERMINATION; POLAR ORGANIC POLLUTANTS; S-TRIAZINE HERBICIDES; WATER SAMPLES; ENVIRONMENTAL-SAMPLES; GRAPHITIZED CARBON; MASS-SPECTROMETRY; NATURAL-WATERS; PESTICIDES SO - Journal of Chromatography A 2002 ;950(1-2):157-166 5017 UI - 10784 AU - caraz-Gonzalez V AU - Harmand J AU - Rapaport A AU - Steyer JP AU - Gonzalez-Alvarez V AU - Pelayo-Ortiz C AD - INRA, LBE, F-11100 Narbonne, FranceINRA, Lab Anal Syst & Biometrie, F-34060 Montpellier, FranceUniv Guadalajara, Dept Ingn Quim, Guadalajara 44860, Jalisco, MexicoSteyer, JP, INRA, LBE, Ave Etangs, F-11100 Narbonne, France TI - Software sensors for highly uncertain WWTPs: a new approach based on interval observers AB - This paper presents the practical implementation of a new robust interval observer on a I m 3 continuous fixed bed anaerobic reactor used for the treatment of industrial wine distillery wastewater. This interval observer is able to generate guaranteed intervals for the unmeasured variables (i.e. acidogenic and methanogenic bacteria, alkalinity and chemical oxygen demand) from few on-line measurements (i.e. input liquid flow rate, CO2 gaseous flow rate, volatile fatty acids and total inorganic carbon). The main advantage of this approach is its independance with respect to disturbances and uncertainty in the initial conditions, in the kinetics and, last but not least, in the process inputs. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Jalisco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000176592300010 L2 - interval observers;software sensors;unknown process inputs;unknown kinetics;wastewater treatment processes;anaerobic digestion;SYSTEMS SO - Water Research 2002 ;36(10):2515-2524 5018 UI - 9687 AU - Carbaja-Tinoco MD AU - Ober R AU - Dolbnya I AU - Bras W AU - Williams CE AD - Coll France, CNRS, UMR 7125, Phys Mat Condensee Lab, F-75231 Paris, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoESRF, Netherlands Org Sci Res, DUBBLE CRG ESRF, F-38043 Grenoble, FranceCarbaja-Tinoco, MD, Coll France, CNRS, UMR 7125, Phys Mat Condensee Lab, 11 Pl Marcelin Berthelot, F-75231 Paris, France TI - Structural changes and chain conformation of hydrophobic polyelectrolytes AB - A series of hydrophobic sodium poly(styrene-co-styrene sulfonate)'s of various charge fractions was studied by means of two combined techniques, static light scattering and small-angle X-rays scattering. The existence of structural changes as a function of the charge content was evidenced in the full scattering spectrum. By fitting the, experimental data with some known models, we were able to show that these hydrophobic polyelectrolytes have a Gaussian shape at large scales. Moreover, the correlation between characteristic lengths of different scales suggests that the small angle upturn of the most hydrophobic polyelectrolyte's could be related to the conformation of the chains MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000179543800013 L2 - HIGHLY-CHARGED POLYELECTROLYTES; POOR SOLVENTS; CONDENSATION SO - Journal of Physical Chemistry B 2002 ;106(47):12165-12169 5019 UI - 9454 AU - Carballo JL AU - Olabarria C AU - Osuna TG AD - Univ Nacl Autonoma Mexico, Lab Ecol Bentos, Inst Ciencias Mar & Limnol, Mazatlan 82000, MexicoUniv Sydney, Marine Ecol Labs, Sydney, NSW 2006, AustraliaCarballo, JL, Univ Nacl Autonoma Mexico, Lab Ecol Bentos, Inst Ciencias Mar & Limnol, Apartado Postal 811, Mazatlan 82000, Mexico TI - Analysis of four macroalgal assemblages along the Pacific Mexican coast during and after the 1997-98 El Nino AB - We examined the changes in four intertidal macroalgal assemblages sampled at 3-month intervals during and after the 1997-98 El Nino. The assemblages were analyzed using several numerical analyses (specific richness, H' diversity) and multivariate techniques (ANOSIM, cluster, and MDS analyses). During El Nino 1997-98, the water temperature in the sampled zone was almost 5degreesC above the long-term mean. The apparent impact of this factor was greatest in winter-spring 1998. Our results suggest that El Nino influenced the structure of these assemblages in four different ways: (a) El Nino was associated with number of species (lowest in 1998) and H' diversity, which increased in the winter of 1999, when the El Nino-Southern Oscillation (ENSO) was inactive, from 1.2 to 2.3. (b) The average biomass of the macroalgae was significantly greater in the ENSO year (139 g dry weight/m(2)) than in the non-ENSO year (42 g dry weight/m(2)) (c) El Nino conditions were associated with a high population abundance of species of tropical affinity, such as Agardhiella tenera (22.05 g dry weight/m(2) in 1998 versus 0.7 g dry weight/m(2) in 1999), Amphiroa misakiensis (32 versus 1.1), Caulerpa sertularoides (15.35 versus 0), Padina durvillaei (9.2 versus 0.2), Jania capillacea (4.1 versus 0), and Jania mexicana (1.5 versus 0). In 1999, other species with a more temperate affinity appeared, such as Laurencia pacifica (0.12 versus 8.76 g/m(2)) and Colpomenia sinuosa (0 versus 4.8). (d) The multivariate techniques showed that differences among the structure of the four assemblages were more evident in 1999. The greatest homogeneity was detected during ENSO winter-spring, which suggests a communitywide change consistent with the El Nino event MH - Australia MH - Mexico|Sinaloa PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Ecology U5 - J;Editorial Material AV - English IS - 1432-9840 UR - ISI:000180213700004 L2 - seaweed;intertidal assemblages;rocky shores;tropical shores;structural changes;El Nino;La Nina;temperature;winter thermal stress;ROCKY INTERTIDAL COMMUNITIES; BAJA-CALIFORNIA-SUR; NEW-SOUTH-WALES; ALGAL ASSEMBLAGES; SEASONAL-VARIATION; LA-NINA; PATTERNS; SHORE; KELP; ABUNDANCE SO - Ecosystems 2002 ;5(8):749-760 5020 UI - 10432 AU - Carballo JL AU - Naranjo S AD - Univ Nacl Autonoma Mexico, Lab Ecol Bentos, Inst Ciencias Mar & Limnol, Mazatlan 82000, MexicoUniv Sevilla, Lab Biol Marina, Dpto Fisiol & Biol Anim, Fac Biol, E-41080 Seville, SpainCarballo, JL, Univ Nacl Autonoma Mexico, Lab Ecol Bentos, Inst Ciencias Mar & Limnol, Estac Mazatlan,Apartado Postal 811, Mazatlan 82000, Mexico TI - Environmental assessment of a large industrial marine complex based on a community of benthic filter-feeders AB - Biological quality in a bay affected by man's activities was evaluated by means of the composition of assemblages of sponges and ascidians. Our results showed that the structure of these two groups of filter-feeders aided in discriminating between undisturbed and disturbed areas, establishing different "environmental health categories" from moderately to strongly disturbed areas, and in ascertaining the extension of the area of each "health category". We were able to divide the bay into four zones based on type of disturbance or anthropogenic source: (1) stations free of any source of disturbance, (2) stations under moderate disturbance, located close to industrial ports, millworks, etc., (3) stations that are under the direct influence of industrial wastes such as a power station and oil refinery, and (4) stations near strongly disturbed areas, influenced directly by harmful steelworks activities. We differentiated clearly between four large species assemblages. and related the composition of these assemblages to different kinds of disturbances, Thus, these species could be used to manage the marine environment in this bay by comparing the observed fauna, with expected fauna in an unstressed site. Moreover, the joint presence of the sponge Cliona vastifica and tunicate Policitor adriaticum seems always to indicate a more or less pristine environmental situation, functioning as bioindicators of normal conditions. We think that the use of specific bioindicators for monitoring disturbance is a valid tool to establish baselines to predict impacts associated with industrial development in many marine ecosystems. The advantages to monitoring communities on hard rocks versus sandy or muddy bottoms are also commented upon. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Sinaloa MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000177488800016 L2 - biomonitoring;bioindicators;pollution assessment;hard rock communities;sponges;ascidians;faunal assemblages;NEMATODE-COPEPOD RATIO; SOUTHERN SPAIN; POLLUTION; INDEX; BAY; BIOINDICATORS; INDICATORS; ECOSYSTEMS; SPONGES; STRESS SO - Marine Pollution Bulletin 2002 ;44(7):605-610 5021 UI - 9801 AU - Cardador-Martinez A AU - Loarca-Pina G AU - Oomah BD AD - Agr & Agri Food Canada, Pacific Agri Food Res Ctr, Natl Bioprod & Bioproc Program, Summerland, BC V0H 1Z0, CanadaUniv Autonoma Queretaro, Sch Chem, Res & Grad Studies Food Sci, PROPAC, Queretaro 76010, Qro, MexicoOomah, BD, Agr & Agri Food Canada, Pacific Agri Food Res Ctr, Natl Bioprod & Bioproc Program, Summerland, BC V0H 1Z0, Canada TI - Antioxidant activity in common beans (Phaseolus vulgaris L.) AB - Beans were pearled to evaluate the feasibility of increasing antioxidant activity and phenolic antioxidants. Phenolics were concentrated mostly in the hull fraction at about 56 mg of catechin equivalents per gram of sample. The methanolic extracts of the pearled bean samples were screened for antioxidant potential using the beta-carotene-linoleate and the 1,1-diphenyl-2-picrylhydrazyl (DPPH) in vitro model systems. The pearled material, also referred to as milled samples, exhibited antioxidant activity that correlated with phenolic content and inhibited DPPH significantly in a dose-dependent manner. Phenolics and antioxidant activities were also examined in chromatographic fractions of methanolic extracts of manually obtained hulls that represented a model used previously to ascertain antimutagenic activity. Fractions extracted with ethyl acetate/acetone and acetone displayed antioxidant activity, which implies potent free radical scavenging activity with antimutagenic activity MH - Canada MH - Mexico|Queretaro PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 40 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000179266000007 L2 - phenolics;antioxidant activity;beta-carotene;DPPH;pearling;dry milling;beans;DRY BEANS; PHENOLIC-COMPOUNDS; EXTRACT; HULLS; FLAVONOIDS; INHIBITORS; BUCKWHEAT; ASSAY; SEEDS; MEN SO - Journal of Agricultural and Food Chemistry 2002 ;50(24):6975-6980 5022 UI - 8479 AU - Carey JR AU - Liedo P AU - Harshman L AU - Zhang Y AU - Muller HG AU - Partridge L AU - Wang JL AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAColegio Frontera, Tapachula 30700, Chiapas, MexicoUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USAUniv London Univ Coll, Dept Biol, London NW1 2HE, EnglandCarey, JR, Univ Calif Davis, Dept Entomol, 1 Shields Ave, Davis, CA 95616 USA TI - Life history response of Mediterranean fruit flies to dietary restriction AB - The purpose of this study was to investigate medfly longevity and reproduction across a broad spectrum of diet restriction using a protocol similar to those applied in most rodent studies. Age-specific reproduction and age of death were monitored for 1200 adult males and 1200 females, each individually maintained on one of 12 diets from ad libitum to 30% of ad libitum. Diet was provided in a fixed volume of solution that was fully consumed each day, ensuring control of total nutrient consumption for every fly. Contrary to expectation and precedence, increased longevity was not observed at any level of diet restriction. Among females, reproduction continued across all diet levels despite the cost in terms of increased mortality. Among males, life expectancy exceeded that of females at most diet levels. However, in both sexes, mortality increased more sharply and the pattern of survival changed abruptly once the diet level fell to 50% of ad libitum or below, even though the energetic demands of egg production has no obvious counterpart in males. We believe that a more complete picture of the life table response to dietary restriction will emerge when studies are conducted on a wider range of species and include both sexes, more levels of diet, and the opportunity for mating and reproduction MH - USA MH - United Kingdom MH - Mexico|Chiapas PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 23 U4 - Cell Biology;Geriatrics & Gerontology U5 - J;Article AV - English IS - 1474-9718 UR - ISI:000182895400010 L2 - cost of reproduction;life span;life table;male-female mortality;longevity extension;sex-mortality differentials;AGE-SPECIFIC MORTALITY; DROSOPHILA-MELANOGASTER; CALORIC RESTRICTION; ADULT LONGEVITY; FLY FEMALES; REPRODUCTION; FOOD; NUTRITION; FECUNDITY; FERTILITY SO - Aging Cell 2002 ;1(2):140-148 5023 UI - 10853 AU - Carey JR AU - Liedo P AU - Harshman L AU - Liu X AU - Muller HG AU - Partridge L AU - Wang JL AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USAUniv Calif Davis, Dept Stat, Davis, CA 95616, USAUniv Coll London, Dept Biol, London, EnglandCarey, JR, Univ Calif Davis, Dept Entomol, Davis, CA 95616, USA TI - Food pulses increase longevity and induce cyclical egg production in Mediterranean fruit flies AB - 1. Inasmuch as virtually all studies on mortality and reproduction in insects are conducted under conditions in which food availability is constant, little is known about the demographic response of insects to variable food environments. For example, it is not known if and to what extent the life expectancy of insects subjected to shortages of high-quality food will increase and/or whether this increase is associated with major decreases in lifetime reproduction. 2. Therefore cohorts of 100 individual female medflies were subjected to different sets of conditions of protein availability (interspersed with sugar-only diets) including ad libitum sugar-only (no protein), ad libitum protein and full (protein) diet either every 2nd, 4th, 6th, 11th or 21st day, as well as two lag-treatments (1 day full diet followed by 30 days sugar-only, followed by one of two cyclical treatments). 3. Both life expectancy and lifetime reproduction were strongly affected by specific treatments. Specifically (i) mortality was inversely related to frequency of protein availability whereas lifetime reproduction was directly related; (ii) distinct cycles in reproduction began to appear when food pulse cycles were as short as every 4 days. However, egg-laying peaks and troughs were particularly pronounced in the 10- and 20-day food pulse cycles; (iii) the peak and trough levels were inversely related to cycle length; and (iv) the within-cycle height was independent of cycle length, occurring 4 days after protein food was made available to the cohort whether the cycle length was 5, 10 or 20 days. 4. The results shed new light on the within- and between-cycle and lifetime dynamics of reproduction when insects are subjected to variable food environments and indicate that medfly females track food level very closely MH - United Kingdom MH - Mexico|Chiapas MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 18 U4 - Ecology U5 - J;Article AV - English IS - 0269-8463 UR - ISI:000176130200005 L2 - food restriction;life span;life table;reproduction;variable environment;RHAGOLETIS-POMONELLA DIPTERA; LIFE-HISTORY EVOLUTION; CERATITIS-CAPITATA; FLY FEMALES; PHENOTYPIC PLASTICITY; DIETARY RESTRICTION; CALORIC RESTRICTION; REPRODUCTION; TEPHRITIDAE; DROSOPHILA SO - Functional Ecology 2002 ;16(3):313-325 5024 UI - 11573 AU - Carey JR AU - Liedo P AU - Harshman L AU - Zhang Y AU - Muller HG AU - Partridge L AU - Wang JL AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAUniv Coll London, Dept Biol, London NW1 2HE, EnglandUniv Calif Davis, Dept Stat, Davis, CA 95616, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USAEl Colegio Frontera Sur, Tapachula, Chiapas, MexicoCarey, JR, Univ Calif Davis, Dept Entomol, 1 Shields Ave, Davis, CA 95616 USA TI - A mortality cost of virginity at older ages in female Mediterranean fruit flies AB - Mortality rates were measured over the lifetime of 65,000 female Mediterranean fruit flies, Ceratitis capitata, maintained in either all-female (virgin) cages or cages with equal initial numbers of males, to determine the effect of sexual activity and mating on the mortality trajectory of females at older ages. Although a greater fraction of females maintained in all-female (virgin) cages survived to older ages, the life expectancy of the surviving virgins was less than the life expectancy of surviving non-virgins at older ages. This was due to a mortality crossover where virgin flies experience lower mortality than mated flies from eclosion to Day 20 but higher mortality thereafter. These results suggest that there are two consequences of mating-a short-term mortality increase (cost) and a longer term mortality decrease (benefit). (C) 2002 Elsevier Science Inc. All rights reserved MH - USA MH - United Kingdom MH - Mexico|Chiapas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geriatrics & Gerontology U5 - J;Article AV - English IS - 0531-5565 UR - ISI:000174571600004 L2 - Mediterranean fruit fly;Ceratitis capitata;cost of reproduction;cost of mating;life tables;age-specific mortality;LARGE MEDFLY COHORTS; LONGEVITY; REPRODUCTION; EVOLUTION; RATES; DIFFERENTIALS; SENESCENCE; LIFETABLES; SURVIVAL; DIPTERA SO - Experimental Gerontology 2002 ;37(4):507-512 5025 UI - 7785 AU - Caridroit M AU - Lamerandt A AU - Degardin JM AU - de Dios AF AU - Vachard D AD - Univ Sci & Tech Lille Flandres Artois, CNRS, Upresa 8014, UFR Sci Terre, F-59655 Villeneuve Dascq, FranceUniv Autonoma Guerrero, Escuela Res Ciencias Teirra, Taxco, Guerrero, MexicoCaridroit, M, Univ Sci & Tech Lille Flandres Artois, CNRS, Upresa 8014, UFR Sci Terre, F-59655 Villeneuve Dascq, France TI - Discovery of radiolaria and conodonts in the Carboniferous-Permian of San Salvador Patlanoaya (Puebla, Mexico); biostratigraphic implications AB - New identifications of radiolaria and conodonts allow clarifying the biostratigraphy of the Pennsylvanian and Permian deposits in San Salvador Patlanoaya (Puebla State, Mexico). The radiolaria are sometimes relatively common in the series, but weakly diversified and endemic. Among the conodonts, Streptognathodus bellus is characteristic of the Late 'Virgilian' sensu Baars, probably coeval with the Early Wolfcampian sensu Thompson or Wilde, the Bursumian of Ross & Ross or the Orenburgian-Asselian stage or substage of Russia (sensu Davydov). San Salvador Patlanoaya is a key-section for the Pennsylvanian-Permian boundary in Mexico. (C) 2002 Academie des sciences / Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Guerrero PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Paleontology U5 - J;Article AV - English IS - 1631-0683 UR - ISI:000184629000002 L2 - Pennsylvanian;Permian;biostratigraphy;conodont;radiolaria;Mexico;FUSULINIDS SO - Comptes Rendus Palevol 2002 ;1(4):205-211 5026 UI - 10739 AU - Carigi L AU - Hernandez X AU - Gilmore G AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandCarigi, L, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - Chemical evolution models of local dwarf spheroidal galaxies AB - We calculate chemical evolution models for four dwarf spheroidal (dSph) satellites of the Milky Way (Carina, Ursa Minor, Leo I and Leo II) for which reliable non-parametric star formation histories have been derived. In this way, the independently-obtained star formation histories are used to constrain the evolution of the systems we are treating. This allows us to obtain robust inferences on the history of such crucial parameters of galactic evolution as gas infall, gas outflows and global metallicities for these systems. We can then trace the metallicity and abundance ratios of the stars formed, the gas present at any time within the systems and the details of gas ejection, of relevance to enrichment of the galaxies environment. We find that galaxies showing one single burst of star formation (Ursa Minor and Leo II) require a dark halo slightly larger that the current estimates for their tidal radii, or the presence of a metal-rich selective wind that might carry away much of the energy output of their supernovae before this might have interacted and heated the gas content, for the gas to be retained until the observed stellar populations have formed. Systems showing extended star formation histories (Carina and Leo I), however, are consistent with the idea that their tidally-limited dark haloes provide the necessary gravitational potential wells to retain their gas. The complex time structure of the star formation in these systems remains difficult to understand. Observations of detailed abundance ratios for Ursa Minor strongly suggest that the star formation history of this galaxy might in fact resemble the complex picture presented by Carina or Leo I, but localized at a very early epoch MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000176834400014 L2 - stars : formation;ISM : evolution;galaxies : abundances;galaxies : evolution;galaxies : haloes;Local Group;COLOR-MAGNITUDE DIAGRAMS; STAR-FORMATION HISTORIES; ELLIPTIC GALAXIES; STELLAR YIELDS; DARK-MATTER; MASS STARS; URSA-MINOR; DRACO; GRADIENTS; METALLICITY SO - Monthly Notices of the Royal Astronomical Society 2002 ;334(1):117-128 5027 UI - 11045 AU - Carigi L AU - Hernandez X AU - Gilmore G AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandCarigi, L, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Dark matter and chemical evolution of dSph galaxies AB - We calculate chemical evolution models for 4 dwarf spheroidal satellites of the Milky Way (Carina, Ursa Minor, Leo I and Leo II) for which reliable non-parametric star formation histories have been derived. We find that galaxies showing one single burst of star formation (Ursa Minor and Leo II) require a dark halo slightly larger that the current estimates for their tidal radii for the gas heated by supernovae to be retained until the observed stellar population has formed. Systems showing extended star formation histories however (Carina and Leo I), are consistent with the idea that their tidally limited dark haloes provide the necessary gravitational potential wells to retain their gas MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000175921200127 L2 - DWARF SPHEROIDAL GALAXIES SO - Astrophysics and Space Science 2002 ;281(1-2):533-534 5028 UI - 10034 AU - Carleton MD AU - Sanchez O AU - Vidales GU AD - Col Sanchez, Mexico City 50040, DF, MexicoNatl Autonomous Univ Mexico, Dept Zool, Mexico City 04510, DF, MexicoCarleton, MD, Natl Museum Nat Hist, Dept Systemat Biol, Smithsonian Inst, Washington, DC 20560 USA TI - A new species of Habromys (Muroidea : Neotominae) from Mexico, with generic review of species definitions and remarks on diversity patterns among Mesoamerican small mammals restricted to humid montane forests AB - A new species of Habromys, H. delicatulus, is described from an isolated patch of cloud forest situated on a northern exposure of the Cordillera Neovolcanica, Estado de Mexico. The species is the smallest so far known in the genus and is further characterized by its delicate cranial features. Morphometric comparisons with the five other species-group taxa currently allocated to the genus recommend the elevation of ixtlani Goodwin, 1964. as a species distinct from Habromys lepturus (Merriam, 1898). Habromys lophurus (Merriam, 1908), known from highlands east of the Isthmus of Tehuantepec, appears to be the sister taxon to the former pair, each restricted in separate Oaxaean ranges west of the Isthmus. Habromys chinanteco (Robertson & Mussel, 1976) is retained as a species, but its possible status as it junior synonym under H. simulatus (Osgood, 1904) warrants continued investigation with improved samples. The montane distribution of Habromys in naturally discontinuous humid-forest associations of northern Mesoamerica is considered in the context of diversity patterns summarized for other small terrestrial mammals confined to such forests MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 6 U4 - Biology U5 - J;Review AV - English IS - 0006-324X UR - ISI:000178683000002 L2 - SMALL-EARED SHREW; MORPHOLOGICAL EVOLUTION; PEROMYSCUS-LEUCOPUS; ADAPTIVE RADIATION; TAXONOMIC STATUS; GROUP RODENTIA; MURIDAE; SIGMODONTINAE; SYSTEMATICS; BOYLII SO - Proceedings of the Biological Society of Washington 2002 ;115(3):488-533 5029 UI - 11866 AU - Carneiro FF AU - Cifuentes E AU - Tellez-Rojo MM AU - Romieu I AD - Minas Ctr Environm & Epidemiol Studies, BR-31310580 Belo Horizonte, MG, BrazilInst Nacl Salud Publ, CISP, Direcc Ciencias Ambientales, Cuernavaca, Morelos, MexicoPan Amer Hlth Org, Mexico City, DF, MexicoCarneiro, FF, Minas Ctr Environm & Epidemiol Studies, Rua Chenade Nasser 141, BR-31310580 Belo Horizonte, MG, Brazil TI - The risk of Ascaris lumbricoides infection in children as an environmental health indicator to guide preventive activities in Caparao and Alto Caparao, Brazil AB - Objective To develop an environmental health indicator for use as a basis for developing preventive measures against Ascaris lumbricoides infection in children from the rural municipalities of Caparao and Alto Caparao, in Minas Gerais, Brazil. Methods A cross-sectional survey was conducted between May and September 1998 among 1171 children under 14 years of age living in 588 dwellings selected from 11 communities. Trained interviewers used a questionnaire to identify risk factors for infection (socioeconomic, sanitation and hygiene variables) and collected stool samples from each child for parasitological tests. Results The overall prevalence of A. lumbricoides infection was 12.2%. The results showed the protective effects of availability of water in the washbasin and better hygiene, sanitation and socioeconomic status; the interactive effect of crowding was five times larger in households without water in the washbasin than in those having water. There was a statistically significant association between infection and children's age. Conclusion The environmental health indicator, which incorporated the most significant biological, environmental and social factors associated with the risk of A. lumbricoides infection in children from these communities, should contribute to the development of surveillance tools and health protection measures in this population MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000173611800008 L2 - ascariasis/epidemiology;water supply;toilet facilities;prevalence;cross sectional studies;child;Brazil (source : MeSH, NLM);DEVELOPING-COUNTRIES; WATER; SANITATION; PREVALENCE; COMMUNITIES; INTENSITY; HYGIENE; EGGS SO - Bulletin of the World Health Organization 2002 ;80(1):40-46 5030 UI - 10845 AU - Caro-Corrales J AU - Cronin K AU - Abodayeh K AU - Gutierrez-Lopez G AU - Ordorica-Falomir C AD - Natl Univ Ireland Univ Coll Cork, Dept Proc Engn, Cork, IrelandInst Politecn Nacl, Dept Grad Alimentos, Mexico City, DF, MexicoUniv Autonoma Sinaloa, Maestria Ciencia & Tecnol Alimentos, Sinaloa, MexicoCronin, K, Natl Univ Ireland Univ Coll Cork, Dept Proc Engn, Cork, Ireland TI - Analysis of random variability in biscuit cooling AB - The cooling of biscuits after baking can be considered as a random phenomenon. The Fourier field equation for transient heat transfer is used as the basis for the deterministic modelling of a single biscuit in a laboratory cooler. The Monte Carlo method is applied to the Fourier equation to predict the dispersion in biscuit surface temperature at the end of the cooling process. Theoretical solutions are also used to characterise the variability in biscuit temperature by considering biscuit cooling as a probabilistic thermal process. The mean and standard deviation in biscuit thermal properties, initial biscuit temperature and heat transfer coefficient are measured and are considered as the input random variables. The numerical output and theoretical solutions are compared with experimental results. Parameter studies are conducted with the probabilistic model to assess the influence of variability in thermal properties on final biscuit temperature variability and to suggest process improvement strategies. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Ireland MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000176513700008 L2 - biscuit cooling;heat transfer;Monte Carlo simulation;temperature dispersion SO - Journal of Food Engineering 2002 ;54(2):147-156 5031 UI - 11300 AU - Carral P AU - Kurtz SE AU - Rodriguez LF AU - Menten K AU - Canto J AU - Arceo R AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, MexicoMax Planck Inst Radioastron, D-53121 Bonn, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Michoacana San Nicolas de Hidalgo, Escuela Ciencias Fisicomatemat, Morelia 58040, Michoacan, MexicoCarral, P, Univ Guanajuato, Dept Astron, Apdo Postal 144, Guanajuato 36000, Mexico TI - Detection of the winds from the exciting sources of shell HII regions in NGC 6334 AB - We present results of high-sensitivity, high-resolution, multifrequency VLA observations toward the star-forming complex NGC 6334. We find that the H II region NGC 6334E, previously described as spherical, has a shell-like morphology. An additional shell-like radio source, G351.02+0.65, is mapped at 330 MHz. Four radio sources in the NGC 6334 complex present shell-like morphology; their diameters vary from 0.12 to 3.5 pc. Compact radio sources are detected at the center of the shells of NGC 6334E and NGC 6334A. These compact sources are believed to be associated with the exciting stars and are probably tracing ionized stellar winds. This is the first time for any H II region that both the shell and the central object are detected simultaneously in the radio. Two compact radio sources are detected toward the NGC 6334I(N) molecular core. One of them lies within 0."3 of the position of a bright Class II methanol maser, suggesting that the radio source is associated with a young embedded massive star. This is the first detection of a radio continuum source in the NGC 6334I(N) region MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000175311200029 L2 - HII regions;radio continuum;stars : early-type;stars : formation;H-II-REGIONS; O-TYPE STARS; MOLECULAR CLOUDS; METHANOL MASERS; INFRARED OBSERVATIONS; NGC-6334 COMPLEX; MASS-LOSS; ULTRACOMPACT; EMISSION; GHZ SO - Astronomical Journal 2002 ;123(5):2574-2582 5032 UI - 10434 AU - Carranza J AU - Brennan C AU - Sletten J AU - Lloret F AU - Julve M AD - Univ Bergen, Dept Chem, N-5007 Bergen, NorwayUniv Valencia, Fac Quim, Inst Ciencia Mol, Dept Quim Inorgan, E-46100 Valencia, SpainUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98000, MexicoSletten, J, Univ Bergen, Dept Chem, Allegaten 41, N-5007 Bergen, Norway TI - Three one-dimensional systems with end-to-end dicyanamide bridges between copper(II) centres: structural and magnetic properties AB - The preparation, crystal structures and magnetic properties of three different copper(II) chains of formula [Cu(pyim)-(H2O)(dca)](n)(NO3)(n) (1), [Cu(dpa)(dca)(2)](n) (2) and [Cu(bpa)(dca)(2)](n) (3) [pyim = 2-(2-pyridyl)imidazole, dca = dicyanamide anion, dpa = 2,2'-dipyridylamine and bpa = 1,2-bis(4-pyridyl)ethane] are reported. A chain structure with single, symmetrical, end-to-end dca bridges is found in compound 1. This bridging mode, with two short, equatorially coordinated Cu-N bonds has not been previously observed in the [Cu(dca)X-n] (X = coligand) family of compounds. The copper atom in 1 has a distorted square pyramidal geometry with a bidentate pyim ligand and two nitrile nitrogen atoms from two dca groups in the equatorial positions and a water molecule occupying the axial site. In compound 2, the single dca bridge is of the asymmetric end-to-end type. The copper environment in 2 is also distorted square pyramidal with a bidentate dpa ligand and two nitrile nitrogen atoms (one from a terminally bound dca and the other from a bridging dca) in the equatorial positions and a nitrile nitrogen atom from another bridging dca occupying the axial site. Compound 3 also features a uniform chain structure. In this case double, asymmetric end-to-end dca bridges and a bis-monodenate bpa bridge in the gauche conformation connect the neighbouring copper atoms. The copper(II) coordination geometry in 3 is elongated octahedral with two trans coordinated bpa nitrogen atoms and two dca nitrile nitrogens in the equatorial sites and two nitrile nitrogen atoms from two other dca groups occupying the axial positions. The copper-copper separations across the dca bridges are 7.7011( 9) (1), 7.689(2) (2) and 7.095(3) Angstrom (3). Magnetic susceptibility measurements for 1-3 in the temperature range 1.9-290 K reveal the occurrence of weak intrachain antiferromagnetic interactions [J = -0.35(1), -0.10 (2) and -0.22 cm(-1) (3) the Hamiltonian being defined as (H) over cap = -JSigma(i)(S) over cap (i).(S) over cap (i) (+) (1)]. The efficiency of the dca bridge to mediate magnetic interactions in copper(II) complexes is analyzed and discussed in the light of the available magneto-structural data MH - Mexico|Zacatecas MH - Norway MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 45 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000177428200015 L2 - DCA = DICYANAMIDE; X-RAY STRUCTURE; CRYSTAL-STRUCTURES; COORDINATION POLYMERS; CO; NI; N(CN)(2)(-); COMPLEXES; NETWORKS; MN SO - Journal of the Chemical Society-Dalton Transactions 2002 ;(16):3164-3170 5033 UI - 12177 AU - Carreon-Martinez LB AU - Huerta-Diaz MA AU - Nava-Lopez C AU - Siqueiros-Valencia A AD - Univ Autonoma Nuevo Leon, Fac Biol, San Nicolas de los Garza 66451, Nuevo Leon, MexicoCtr Invest Oceanol, Coronado, CA 92178, USAUniv Autonoma Baja California, Inst Invest Oceanol, Fac Ciencias Marinas, Posgrad Oceanog Costera, Ensenada 22800, Baja California, MexicoHuerta-Diaz, MA, Univ Autonoma Nuevo Leon, Fac Biol, Apdo Postal 2790, San Nicolas de los Garza 66451, Nuevo Leon, Mexico TI - Levels of reactive mercury and silver in sediments from the port of Ensenada, Baja California, Mexico MH - Mexico|Baja California MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000172751300020 L2 - SAN-FRANCISCO BAY; ESTUARINE WATERS; MARINE-SEDIMENTS; BIOAVAILABILITY; BIOACCUMULATION; METHYLMERCURY; DEPOSITION; SPECIATION; ISOTOPES; TOXICITY SO - Bulletin of Environmental Contamination and Toxicology 2002 ;68(1):138-147 5034 UI - 10552 AU - Carrillo-Castaneda G AU - Munoz JJ AU - Peralta-Videa JR AU - Gomez E AU - Tiemannb KJ AU - Duarte-Gardea M AU - Gardea-Torresdey JL AD - Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968, USAColegio Postgrad, Montecillo 56230, MexicoUniv Texas, Coll Allied Hlth, El Paso, TX 79968, USAGardea-Torresdey, JL, Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968 USA TI - Alfalfa growth promotion by bacteria grown under iron limiting conditions AB - This investigation has been conducted to compare and contrast, the impact of 18 potentially plant growth-promoting bacterial strains, cultured in rich and iron-deficient minimal media, on alfalfa seed germination and seedling vigor. Our results showed that,seed germination was improved by all of the bacterial strains grown in iron-deficient minimal medium. We also found that all the seeds inoculated with the bacterial strains grown in iron-deficient minimal medium produced seedlings with larger roots (55-66 mm) than the roots of uninoculated control plants (54.9 mm). Furthermore, most of the strains cultivated in iron-deficient minimal medium generated seedlings with larger roots than those seeds inoculated with microbial cells grown in iron-rich medium (37-59 mm). Overall, seeds inoculated with the strain U cultivated in iron-deficient minimal medium gave rise to plantlets, with the greatest length (81 mm). On the other hand, seeds inoculated with bacterial cells grown under iron-rich media show significantly higher stem and root dry weight, which is an indication of the influence of the growth conditions on the plant growth-promoting ability of these microorganisms. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Environmental;Engineering, Chemical U5 - J;Article AV - English IS - 1093-0191 UR - ISI:000177238400018 L2 - bacterial-enhanced plant growth;alfalfa;LIME-INDUCED CHLOROSIS; PLANT-GROWTH; AZOSPIRILLUM-BRASILENSE; MICROBIAL SIDEROPHORES; WHEAT; PSEUDOMONAS; TOXICITY; DEFICIENCIES; INOCULATION; RHIZOSPHERE SO - Advances in Environmental Research 2002 ;6(3):391-399 5035 UI - 10687 AU - Carrillo-Nava E AU - Dohnal V AU - Costas M AD - Univ Nacl Autonoma Mexico, Fac Quim, Lab Termofis, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoInst Chem Technol, Dept Phys Chem, Prague 16628 6, Czech RepublicUniv Nacl Autonoma Mexico, Fac Quim, Lab Termofis, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoDohnal, V, Univ Nacl Autonoma Mexico, Fac Quim, Lab Termofis, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Infinite dilution activity coefficients for toluene in aqueous solutions of the protein stabilizers glycerol, ethylene glycol, glucose, sucrose and trehalose AB - Experimental infinite dilution activity coefficients gamma(1)(infinity) for toluene in aqueous solutions of five protein stabilizers, glycerol, ethylene glycol, glucose, sucrose and trehalose, are reported. The data were measured over the temperature range 273 K to 323 K. The concentrations of these stabilizers were chosen to match as closely as possible those used in the biochemistry field. For glycerol, the data were measured at four concentrations (0.5 mol (.) dm(-3) to 5.0 mol (.) dm(-3)); at the highest glycerol concentration, gamma(1)(infinity) was also determined at T = 268 K. Ethylene glycol, glucose and sucrose were used at a single concentration (1.5 mol (.) dm(-3)), while trehalose was employed at 0.5 mol (.) dm(-3). As the concentration of glycerol increases, there is a significant decrease-of gamma(1)(infinity) values with respect to the. pure solvent water case, indicating that this modifier is able to solubilize more toluene than pure water. At all temperatures studied, the presence of ethylene glycol also decreases gamma(1)(infinity) values. On the other hand, glucose shows the opposite effect, i.e. it solubilizes less toluene than pure water. The other three modifiers (glycerol, sucrose and trehalose), are unable to solubilize more toluene than pure water at low temperatures, but as the temperature is increased they become solubilizing agents. The modifier concentrations and temperatures, where less of the non-polar toluene can be solubilized, are those often used to store proteins, to prevent them from denaturating. The solute in (water + modifier) y(1)(infinity) data were analyzed through a classical thermodynamic scheme employing solution and transfer (water to (water + modifier)) quantities. We compare the solubilization power of the protein denaturants urea and guanidine hydrochloride (J. Chem. Thermodynamics 2000, 32, 1683-1705) with that displayed by the protein stabilizers used here. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Czech Republic MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Thermodynamics;Chemistry, Physical U5 - J;Article AV - English IS - 0021-9614 UR - ISI:000176863500003 L2 - infinite dilution activity coefficients;toluene;inert gas stripping method;aqueous solutions;protein stabilizers;glycerol;ethylene glycol;sucrose;glucose;trehalose;thermodynamic properties of solution and transfer;GAS STRIPPING METHOD; IN-VITRO; WATER; HYDROCARBONS; DENATURANTS; BENZENE; YEAST SO - Journal of Chemical Thermodynamics 2002 ;34(4):443-456 5036 UI - 11211 AU - Carrillo-Rivera JJ AU - Cardona A AU - Edmunds WM AD - Univ Nacl Autonoma Mexico, Inst Geog, Coyoacan 04510, DF, MexicoBritish Geol Survey, Wallingford OX10 8BB, Oxon, EnglandCarrillo-Rivera, JJ, Univ Nacl Autonoma Mexico, Inst Geog, CU, Coyoacan 04510, DF, Mexico TI - Use of abstraction regime and knowledge of hydrogeological conditions to control high-fluoride concentration in abstracted groundwater: San Luis Potosi basin, Mexico AB - Significant amounts of fluoride are found in the abstracted groundwater of San Luis Potosi. This groundwater withdrawal induces a cold. low-fluoride flow as well as deeper thermal fluoride-rich flow in various proportions. Flow mixing takes place depending on the abstraction regime, local hydrogeology, and borehole construction design and operation, Fluoride concentrations (approximate to 3.7 mg l(-1)) could become higher still. in time and space, if the input of regional fluoride-rich water to the abstraction boreholes is enhanced. It is suggested that by controlling the abstraction well-head water temperature at 28-30 degreesC, a pumped water mixture with a fluoride content close to the maximum drinking water standard of 1.5 mg l(-1) will be produced. Further, new boreholes and those already operating could take advantage of fluoride solubility controls to reduce the F concentration in the abstracted water by considering lithology and borehole construction design in order to regulate groundwater flow conditions. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000175364700002 L2 - fluoride;hydrogeochemistry;groundwater;water-rock interactions;Mexico;WATERS; MODEL; FLOW SO - Journal of Hydrology 2002 ;261(1-4):24-47 5037 UI - 9952 AU - Carrillo AE AU - Li CY AU - Bashan Y AD - Ctr Biol Res NW, CIB, La Paz 23000, BCS, MexicoUS Forest Serv, Pacific NW Res Stn, USDA, Forestry Sci Lab, Corvallis, OR 97331, USABashan, Y, Ctr Biol Res NW, CIB, POB 128, La Paz 23000, BCS, Mexico TI - Increased acidification in the rhizosphere of cactus seedlings induced by Azospirillum brasilense AB - Acidification of the rhizosphere of cactus seedlings (giant cardon, Pachycereus pringlei) after inoculation with the plant growth-promoting bacterium Azospirillum brasilense Cd, in the presence or absence of ammonium and nitrate, was studied to understand how to increase growth of cardon seedlings in poor desert soils. While ammonium enhanced rhizosphere and liquid culture acidification, inoculation with the bacteria enhanced it further. On the other hand, nitrate increased pH of the rhizosphere, but combined with the bacterial inoculation, increase in pH was significantly smaller. Bacterial inoculation with ammonium enhanced plant growth MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-1042 UR - ISI:000178827600011 L2 - RESOURCE-ISLAND SOILS; INTACT WHEAT ROOTS; PROTON EFFLUX; SONORAN DESERT; PACHYCEREUS-PRINGLEI; GIANT CACTUS; GROWTH; ESTABLISHMENT; INOCULATION; DEFICIENCY SO - Naturwissenschaften 2002 ;89(9):428-432 5038 UI - 11750 AU - Carrillo HRV AU - de la Torre MPI AD - Univ Auton Zacatecas, Ctr Reg Estudios Nucl, Zacatecas 98068, MexicoUniv Valladolid, Dept Fis Teor & Atom Mol & Nucl, Valladolid, SpainCarrillo, HRV, Univ Auton Zacatecas, Ctr Reg Estudios Nucl, Apdo Postal 336, Zacatecas 98068, Mexico TI - Catalogue to select the initial guess spectrum during unfolding AB - A new method to select the initial guess spectrum is presented. Neutron spectra unfolded from Bonner sphere data are dependent on the initial guess spectrum used in the unfolding code. The method is based on a catalogue of detector count rates calculated from a set of reported neutron spectra. The spectra of three isotopic neutron sources Cf-252, (PuBe)-Pu-239 and Cf-252/D2O, were measured to test the method. The unfolding was carried out using the three initial guess options included in the BUNKIUT code. Neutron spectra were also calculated using MCNP code. Unfolded spectra were compared with those calculated; in all the cases our method gives the best results. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Zacatecas MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000173885900048 L2 - neutron spectroscopy;unfolding;Monte Carlo;MCNP;Bonner spheres;isotopic neutron sources;BONNER SPHERES; NEUTRON; ALGORITHM SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;476(1-2):270-272 5039 UI - 9288 AU - Carslaw KS AU - Kettleborough JA AU - Northway MJ AU - Davies S AU - Gao RS AU - Fahey DW AU - Baumgardner DG AU - Chipperfield MP AU - Kleinbohl A AD - Univ Leeds, Sch Environm, Leeds LS2 9JT, W Yorkshire, EnglandRutherford Lab, British Atmospher Data Ctr, Didcot, Oxon, EnglandUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNOAA, Aeron Lab, Boulder, CO 80305, USAUniv Bremen, Inst Umweltphys, D-28334 Bremen, GermanyCarslaw, KS, Univ Leeds, Sch Environm, Leeds LS2 9JT, W Yorkshire, England TI - A vortex-scale simulation of the growth and sedimentation of large nitric acid hydrate particles AB - Nitric acid-containing particles with diameters of 10-20 mum m were detected inside the Arctic polar vortex in the period January to March 2000. We present the results of a unique three-dimensional microphysical simulation of these large HNO3-containing particles covering the entire Arctic vortex. The model describes the simultaneous growth, evaporation, sedimentation, and advection of several thousand individual nitric acid hydrate particles over their complete lifetime. We compare modeled and observed particle size distributions as a test of different particle nucleation mechanisms. The model is able to produce particles with sizes typical of those observed and broadly reproduces the change in particle characteristics through the winter assuming nitric acid trihydrate (NAT) particle growth. The possibility that the observed large nitric acid-containing particles were composed of nitric acid dihydrate (NAD) cannot be excluded within the uncertainty of the HNO3 field above the aircraft. The formation of nitric acid hydrate particles on synoptic ice clouds may be a source of some of the observed large nitric acid-containing particles. However, a direct, but highly selective, nucleation of NAT or NAD particles over wide regions appears to be necessary to explain the observations MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 30 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180466200106 L2 - denitrification;PSC;ozone;NOy;POLAR STRATOSPHERIC CLOUDS; OZONE DEPLETION; ARCTIC STRATOSPHERE; TEMPERATURE-FLUCTUATIONS; ICE PARTICLES; PSC FORMATION; DENITRIFICATION; WINTER; MODEL; DEHYDRATION SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D20): 5040 UI - 12169 AU - Cartas-Fuentevilla R AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Chicago, Enrico Fermi Inst, Chicago, IL 60637, USACartas-Fuentevilla, R, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - On the symplectic structures for geometrical theories AB - We present a new approach for constructing covariant symplectic structures for geometrical theories, based on the concept of adjoint operators. Such geometric structures emerge by direct exterior derivation of underlying symplectic potentials. Differences and similarities with other approaches and future applications are discussed. (C) 2002 American Institute of Physics MH - Mexico|Puebla MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000172790200039 SO - Journal of Mathematical Physics 2002 ;43(1):644-650 5041 UI - 10350 AU - Carvajal R AU - Zebrowski JJ AU - Vallverdu M AU - Baranowski R AU - Chojnowska L AU - Poplawska W AU - Caminal P AD - Univ Politecn Catalunya, ESAII Dept, Biomed Engn Res Ctr, E-08028 Barcelona, SpainAutonomous Univ Sinaloa, Fac Comp Sci, Mazatlan, MexicoWarsaw Univ Technol, Fac Comp Sci, PL-00661 Warsaw, PolandNatl Inst Cardiol, Warsaw, PolandCaminal, P, Univ Politecn Catalunya, ESAII Dept, Biomed Engn Res Ctr, Pau Gargallo 5, E-08028 Barcelona, Spain TI - Dimensional analysis of HRV in hypertrophic cardiomyopathy patients MH - Mexico|Sinaloa MH - Poland MH - Spain PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Biomedical;Medical Informatics U5 - J;Article AV - English IS - 0739-5175 UR - ISI:000177833900013 L2 - HEART-RATE-VARIABILITY; ACUTE MYOCARDIAL-INFARCTION; TIME-SERIES; NONLINEAR DYNAMICS; ATTRACTORS; COMPLEXITY; BEHAVIOR SO - Ieee Engineering in Medicine and Biology Magazine 2002 ;21(4):71-78 5042 UI - 9503 AU - Carvalho FP AU - Gonzalez-Farias F AU - Villenueve JP AU - Cantani C AU - Hernandez-Garza M AU - Mee L AU - Fowler SW AD - IAEA, Marine Environm Lab, MC-98012 Monaco, MonacoNatl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Sinaloa 82000, MexicoUniv Plymouth, Plymouth Environm Res Ctr, Plymouth PL4 8AA, Devon, EnglandInst Tecnol & Nucl, P-2686953 Sacavem, PortugalCarvalho, FP, IAEA, Marine Environm Lab, BP 800, MC-98012 Monaco, Monaco TI - Distribution, fate and effects of pesticide residues in tropical coastal lagoons of northwestern Mexico AB - Analyses of pesticide residues in sediments, water and biota of the Altata. - Ensenada del Pabellon coastal lagoon system in Sinaloa, Mexico, showed the presence of organochlorine and organophosphorus compounds. For all the compounds analysed, concentrations in sediments were higher near the points of Water discharge from ponds and drainage from the agricultural area. Among the organochlorines, total DDTs displayed the largest sedimentary reservoir, followed by total endosulfans and chlorpyrifos. In sediments, as well as in biota, pp'-DDT concentrations were lower than those of DDT metabolites, which confirms the reduction in the previous massive use of this compound in agriculture. Endosulfan is currently used in the region and endosulfan residues in lagoon sediments attained levels considered to be toxic to meiofauna, therefore constituting an ecological risk to lagoon ecosystems. There was a Large sedimentary reservoir of chlorpyrifos but its ecotoxicological risk is difficult to assess due to lack of adequate comparative data. Nevertheless, concentrations of chlorpyrifos which approach acute toxic levels for shrimp were recorded in lagoon water. This suggests that drainage from agricultural fields during high runoff may, on occasion, cause mass mortality of shrimp and fish. Organophosphorus pesticides are widely regarded to degrade very rapidly in aquatic systems. Experimental research performed With C-14-labelled chlorpyrifos and parathion has shown that they may be stabilised for relatively long periods of time through sediment-water partitioning. This extension of their environmental half-lives increases their potential for impacting on coastal ecosystems. Since organophosphorus pesticides are highly toxic for aquatic organisms at concentrations generally lower than organochlorines, their presence in the lagoon water and sediment is a matter for much concern. The increased use of tropical coastal lagoons for shrimp and fish farming requires the implementation of environmental management practices to protect these ecosystems from the impact of agricultural activities. Environmental management aims to preserve the ecosystem integrity of these coastal lagoons and, through improving the water quality, to allow the development of aquaculture and reduce human exposure to pesticide residues in food MH - United Kingdom MH - Mexico|Sinaloa MH - Monaco MH - Portugal PB - LONDON: SELPER LTD, PUBLICATIONS DIV RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0959-3330 UR - ISI:000180166500006 L2 - pesticides;persistent organic pollutants;DDT;endosulfan;chlorpyrifos;tropical lagoons;Mexico;MARINE-ENVIRONMENT; ORGANOPHOSPHORUS PESTICIDES; CHLORINATED HYDROCARBONS; INTERCOMPARISON EXERCISE; ORGANOCHLORINE COMPOUNDS; PETROLEUM-HYDROCARBONS; ACUTE TOXICITY; DEGRADATION; BIOCONCENTRATION; INVERTEBRATES SO - Environmental Technology 2002 ;23(11):1257-1270 5043 UI - 10017 AU - Casanova G AU - Cancela R AU - Alonzo L AU - Benuto R AU - Magana MD AU - Hurley DP AU - Fishbein E AU - Lara C AU - Gonzalez T AU - Ponce R AU - Burnett JW AU - Calton GJ AD - AuRx Inc, Glen Burnie, MD 21061, USASSA, Inst Nacl Perinatol, Mexico City, DF, MexicoSSA, Ctr Dermatol Ladislao Pascua, Mexico City, DF, MexicoHosp Cent Mil, Clin Especialidades, Mexico City, DF, MexicoECA, Tlalpan, MexicoCalton, GJ, AuRx Inc, 500 J McCormick Dr, Glen Burnie, MD 21061, USA TI - A double-blind study of the efficacy and safety of the ICP10 Delta PK vaccine against recurrent genital HSV-2 infections AB - A randomized double-blind trial to evaluate the safety of a novel recombinant virus, ICP10DeltaPK, for reduction or prevention of recurrent herpes simplex virus type 2 (HSV-2) infection was carried out in public hospitals in Mexico City. Persons having a minimum of 5 documented herpetic recurrences in the previous year were randomized for vaccination. Patients were examined within 72 hours of lesion occurrence. If accepted into the study, the patient was inoculated subcutaneously in the upper deltoid muscle area at days 7, 17, and 28 after initiation of lesion occurrence. Recurrences were recorded by patient diary and physician examination. During the observation period (extending from 10 to 180 days after the, last booster dose), recurrences in the vaccine (V) group were prevented completely in 37.5% of the patients, whereas in the placebo (P) group, 100% of the patients had at least one recurrence (P=.068). Vaccinated patients had fewer recurrences (V 1.58; P, 3.13 [P=.028]). The mean number of illness days was 10 for the vaccine group and 18 for the placebo group (P=.028). Further studies to evaluate this vaccine and its dosimetry for the treatment of genital herpes infections appear warranted MH - Mexico|Distrito Federal MH - USA PB - CHATHAM: QUADRANT HEALTHCOM INC RP - NOT IN FILE U3 - TC 9 U4 - Dermatology U5 - J;Article AV - English IS - 0011-4162 UR - ISI:000178690700008 L2 - HERPES-SIMPLEX VIRUS; GLYCOPROTEIN VACCINE; GUINEA-PIGS; TYPE-2; WOMEN; FREQUENT; SUBUNIT; LATENCY SO - Cutis 2002 ;70(4):235-239 5044 UI - 9544 AU - Casas M AU - de Llano M AU - Puente A AU - Rigo A AU - Solis MA AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Illes Balears, Dept Fis, Palma de Mallorca 07071, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoSolis, MA, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Pre-formed Cooper pairs and Bose-Einstein condensation in cuprate superconductors AB - A two-dimensional (2D) assembly of noninteracting, temperature-dependent, pre-formed Cooper pairs in chemical/thermal equilibrium with unpaired fermions is examined in a binary boson-fermion statistical model as the Bose-Einstein condensation (BEC) singularity temperature T-c is approached from above. Compared with BCS theory (which is not a BEC theory) substantially higher T(c)s are obtained without any adjustable parameters, that fall roughly within the range of empirical T(c)s for quasi-2D cuprate superconductors. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000179861900043 L2 - DISPERSION-RELATION; ORGANIC SUPERCONDUCTORS; MODEL SO - Journal of Physics and Chemistry of Solids 2002 ;63(12):2365-2368 5045 UI - 10418 AU - Casas M AU - de Llano M AU - Puente A AU - Rigo A AU - Solis MA AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoSolis, MA, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Two-dimensional Bose-Einstein condensation in cuprate superconductors AB - A binary gas of noninteracting, temperature-dependent Cooper pairs in chemical/thermal equilibrium with unpaired fermions is studied in a two-dimensional (2D) boson-fermion statistical model analogous to an atom plus diatomic- molecule system. The model naturally suggests a more convenient definition for the bosonic chemical potential whereby access into the degenerate Fermi region of positive fermion chemical potential is now possible. The linear (as opposed to quadratic) dispersion relation of the pairs yields substantially higher T(c)s than with BCS or pure-boson Bose-Einstein condensation theories, and fall within the range of empirical Tcs for quasi-2D copper oxide superconductors. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000177577800004 L2 - high-T-c superconductors;electron-phonon interactions;phase transitions;thermodynamic properties;PAIR DISPERSION-RELATION; T-C SUPERCONDUCTORS; COOPER PAIRS; ORGANIC SUPERCONDUCTORS; PSEUDOGAP STATE; FERMION MODEL; GAS; BI2SR2CACU2O8+DELTA; EXCITATIONS; EVOLUTION SO - Solid State Communications 2002 ;123(3-4):101-106 5046 UI - 11089 AU - Cascales C AU - Fernandez-Diaz MT AU - Monge MA AU - Bucio L AD - CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, SpainInst Laue Langevin, F-38042 Grenoble, FranceUniv Nacl Autonoma Mexico, Inst Fis, Dept Estado Solido, Mexico City 01000, DF, MexicoCascales, C, CSIC, Inst Ciencia Mat Madrid, Plaza Murillo 2, E-28049 Madrid, Spain TI - Crystal structure and low-temperature magnetic ordering in rare earth iron germanates RFeGe2O7, R = Y, Pr, Dy, Tm, and Yb AB - Polycrystalline samples of iron and rare earth germanates, RFeGe2O7 (R = Y, Pr, Dy, Tm, and Yb), have been prepared. Depending on the size of R, they present two different monoclinic crystal structures, described either in space group P2(1)/c (no. 14) for R = Pr or in P2(1)/m (no. 11) for the smaller rare earths R = Y, Dy, Tin, and Yb. The results of crystal structure refinements from room-temperature high-resolution neutron powder diffraction (NPD) data are given. Magnetization measurements between 350 and 1.6 K reveal the existence of one maximum, at 3 or 38 K for the praseodymium or yttrium germanate, respectively, and two separate anomalies for the remaining materials, which appear at T-1 and T-2 (T-2 < T-1), where T-1 approximate to 40 K and T-2 = 24, 6, and 5 K, for R = Dy, Tm, and Yb, respectively, indicating transitions to antiferromagnetically (AF) ordered states. Judging from low-temperature NPD data, three-dimensional (3D) AF ordering is established for all compounds, with simultaneous ordering of the R3+ and (or) Fe3+ (R = Y) sublattices, at 3 K in PrFeGe2O7, 38 K in YFeGe2O7, and at T-N = T-1 for the remaining compounds. The ordered magnetic structure of PrFeGe2O7 can be described in terms of the propagation vector k = [1/2, 1/2, 0] and a model that consists of ferromagnetic coupling of the magnetic moments of Fe3+ and Pr3+ along the -FeO5-PrO9-FeO5- chains in the c direction, whereas along the two other axes, the moments show AF coupling. For the R = Y, Dy, Tin, and Yb compounds, the propagation vector of the magnetic structures is k = [0, 0, 0]. In each case, the magnetic structure consists of a ferromagnetic arrangement of all R3+ and (or) Fe3+ (R = Y) magnetic moments within one ac plane, whereas the corresponding moments in up and down adjacent planes are oppositely aligned, leading to 3D AF coupling along the b direction MH - France MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000175790100014 L2 - ENERGY-LEVELS; ND3+; GD; TB; HO; ER SO - Chemistry of Materials 2002 ;14(5):1995-2003 5047 UI - 11861 AU - Cascante A AU - Quesada M AU - Lobo JJ AU - Fuchs EA AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Jose, Costa RicaQuesada, M, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Effects of dry tropical forest fragmentation on the reproductive success and genetic structure of the tree Samanea saman AB - Tropical trees are particularly vulnerable to forest fragmentation it because of their low densities, self-incompatibilty system, and high rates of outbreeding. Forest fragmentation is likely to decrease gene flow, increase endogamy, and eventually produce a high differentiation among remnant populations. Our objectives were to evaluate the effect of forest fragmentation on the reproductive success, progeny vigor, and genetic variation of the tropical dry-forest tree Samanea saman We conducted our study in the dry forest of Costa Rica and compared two tree conditions to evaluate forest fragmentation: (1) isolated, individual trees more than 500 m from the nearest conspecific and surrounded by agricultural fields, pastures, or small remnant forest patches and (2) trees in continuous populations of 10 or more individuals per hectare and surrounded by undisturbed forest, We compared the probability of natural pollination, seed production, genetic variation, and progeny vigor of trees in isolation and in continuous populations. The probability of flowers receiving more than 23 pollen tubes at the base of styles (the flowers more likely to produce a mature fruit) was significantly greater for trees in continuous populations (2.1%) than for trees in isolation (0.4%). However, flowers from the two tree conditions received similar pollen loads on their stigmas. Fruits of trees from continuous populations produced similar numbers of seeds as isolated trees did and had a similar probability of seed predation by brucbid beetles was significantly greater in continuous seed abortion. The probability populations (30%) than in isolated trees (20%). The number of undamaged seeds (potentially viable) was similar for both tree conditions. A genetic analysis of progeny showed that levels of genetic diversity in trees in isolation and in continuous populations were comparable. The effective self-fertilization rate and inbreeding coefficient of the progeny were slightly higher for isolated trees than for trees in continuous populations. In addition, there was more genetic similarity in the progeny of isolated trees, within and between fruits. Seeds produced by different fruits within a tree were more likely to be related in an isolated tree than in a tree from continuous populations. Seeds produced by trees from continuous populations were more likely to germinate and to produce greater leaf area and biomass as seedlings than progeny from isolated trees. We concluded that the fragmentation of tropical dry forests affects the genetic variation and vigor of S. saman progeny. Isolated trees showed high reproductive capacity, however, in spite of their habitat condition MH - Costa Rica MH - Mexico|Michoacan PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 37 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000173726400014 L2 - POPULATION-SIZE; NEOTROPICAL TREE; RAIN-FOREST; HABITAT FRAGMENTATION; BREEDING SYSTEMS; SEED-GERMINATION; MATING SYSTEM; POLLINATION; DIVERSITY; CONSEQUENCES SO - Conservation Biology 2002 ;16(1):137-147 5048 UI - 9841 AU - Casini H AU - Montemayor R AU - Urrutia LF AD - Ctr Phys Theor, F-13288 Marseille, FranceUniv Nacl Cuyo, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, CAB, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaComis Nacl Energia Atom, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoCasini, H, Ctr Phys Theor, Campus Luminy, F-13288 Marseille, France TI - Duality for symmetric second rank tensors: The massive case AB - A family of theories which are dual to the massive spin two Fierz-Pauli field h(munu), both free and coupled to external sources, is constructed in terms of a T-(munu)sigma tensor. The dualization method, a purely Lagrangian approach, is based on a first order parent Lagrangian, from which the dual partners are generated MH - Argentina MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000179081500070 L2 - BORN-INFELD THEORY; GENERALIZED GAUGE-FIELDS; MAGNETIC MONOPOLES; MIXED SYMMETRY; S-DUALITY; VORTICES; STRINGS; SYSTEMS SO - Physical Review D 2002 ;66(8): 5049 UI - 11557 AU - Casis O AU - Gallego M AU - Sanchez-Chapula JA AD - Univ Basque Country, Sch Pharm, Dept Physiol, E-48080 Bilbao, SpainUniv Colima, Univ Ctr Biomed Res, Colima, MexicoCasis, O, Univ Basque Country, Sch Pharm, Dept Physiol, POB 699, E-48080 Bilbao, Spain TI - Imipramine, mianserine and maprotiline block delayed rectifier potassium current in ventricular myocytes AB - Imipramine, mianserine and maprotiline are three widely used antidepressant drugs with different chemical structure. In the present work we have studied the effects of these drugs on the delayed rectifier potassium current (I-K) in myocytes isolated from rat ventricle. The delayed rectifier potassium current, responsible for action potential termination, is blocked by all of the three drugs I-K studied in a state-independent manner. Imipramine and mianserine block I-K in a I : I drug-receptor interaction, whereas maprotiline shows a negative cooperativity in the interaction between the channel complex and drug molecules. (C) 2002 Elsevier Science Ltd MH - Mexico|Colima MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1043-6618 UR - ISI:000174516100011 L2 - antidepressant drugs;delayed rectifier;rat ventricle;K+ CURRENT; MYOCARDIAL-INFARCTION; INTRAVENTRICULAR-CONDUCTION; TRICYCLIC ANTIDEPRESSANTS; SODIUM-CHANNELS; OUTWARD CURRENT; RAT VENTRICLE; I-TO; AMITRIPTYLINE; DRUGS SO - Pharmacological Research 2002 ;45(2):141-146 5050 UI - 10581 AU - Castaneda-Guzman R AU - Villagran-Muniz M AU - Saniger-Blesa JM AU - Lascano L AU - Fernandez JF AD - Univ Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoEscuela Politec Nacl, Dept Fis, Quito, EcuadorCSIC, Inst Ceram & Vidrio, Electroceram Dept, Madrid, SpainCastaneda-Guzman, R, Univ Nacl Autonoma Mexico, Ctr Instrumentos, AP 70186, Mexico City 04510, DF, Mexico TI - Photoacoustic study of phase transition in Aurivillius type ceramics AB - A correlated photoacoustic signal analysis was used for the study of the phase transition in Aurivillius ceramics. Four different ceramic compositions were studied: Bi4Ti3O12 (BIT), PbBi4Ti4O15 (PBIT), Pb2Bi4Ti5O18 (P2BIT) and Pb3Bi4Ti6O21 (P3BIT). The signal analysis of the normalised correlation allowed us to be sure of thermal stability of the material during the measurement. A widening of the acoustic signal in the phase transition region was observed as a function of the increase of the integration factor of the Aurivillius ceramics. This increment of the integration factor produces a structural change that modified the ferroelectric-paraelectric transition from normal ferroelectric to a relaxor type transition. The photoacoustic study reveals the appearance of thermoelastic phenomena in addition of the phase transition MH - Ecuador MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000177217000055 L2 - photoacoustic characterisation;Aurivillius ceramics;DIELECTRIC-PROPERTIES; BISMUTH TITANATE; 3) CERAMICS SO - Ferroelectrics 2002 ;273():2705-2710 5051 UI - 11332 AU - Castaneda VH AU - Jung HP AU - Wolter W AU - Zschock M AD - Univ Guadalajara, Campus Ctr Biol Agr & Vet Sci, Div Vet Med, Dept Salud Publ, Guadalajara 44430, Jalisco, MexicoStaatl Med Lebensmittel & Vet Untersuchungsamt Mi, Abt Vet Med, Giessen, GermanyCastaneda, VH, Univ Guadalajara, Campus Ctr Biol Agr & Vet Sci, Div Vet Med, Dept Salud Publ, Km 15-5 Carretera, Guadalajara 44430, Jalisco, Mexico TI - Occurrence and prevalence of mastitis in Jalisco, Mexico MH - Germany MH - Mexico|Jalisco PB - MUNICH 70: VOLKSWIRTSCHAFTLICHER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0026-3788 UR - ISI:000175157300001 L2 - STAPHYLOCOCCI SO - Milchwissenschaft-Milk Science International 2002 ;57(3):123-124 5052 UI - 10877 AU - Castano VM AU - Saenz A AU - Montero ML AU - Fonseca E AD - Univ Nacl Mexico, Inst Fis, Queretaro 76000, MexicoUniv Costa Rica, Escuela Fis, San Jose 2060, Costa RicaUniv Autonoma Estado Morelos, Cuernavaca, Morelos, MexicoUniv Costa Rica, Escuela Quim, San Jose 2060, Costa RicaCastano, VM, Univ Nacl Mexico, Inst Fis, AP 1-1010, Queretaro 76000, Mexico TI - Calcium phosphate phases grown on silica gels MH - Costa Rica MH - Mexico|Morelos MH - Mexico|Queretaro PB - POULTON: MATRICE TECHNOLOGY LIMITED RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1066-7857 UR - ISI:000176327100003 SO - Materials Technology 2002 ;17(2):72-74 5053 UI - 11302 AU - Castelan-Estrada M AU - Vivin P AU - Gaudillere JP AD - INRA Bordeaux, Dept Agron, ECAV, F-33883 Villenave Dornon, FranceColegio Postgrad, Cardenas 86500, Tabasco, MexicoGaudillere, JP, INRA Bordeaux, Dept Agron, ECAV, BP 81, F-33883 Villenave Dornon, France TI - Allometric relationships to estimate seasonal above-ground vegetative and reproductive biomass of Vitis vinifera L AB - A procedure is described for obtaining allometric regression equations to estimate non-destructively and in a cost-effective manner the current year's above-ground vegetative and reproductive biomass of Vitis vinifera L 'Merlot' throughout the growing season. Significant relationships were obtained over a 3-year period (1998-2000) between the dimensions of an individual shoot per vine (i.e. diameter and length) and dry weights of its primary stem, primary leaves and lateral growth. The dry mass of a grape was best estimated from measurements of the basal diameter of the bunch peduncle. Introducing cumulative degree-days as an additional explanatory variable in the equations allowed them to be used irrespective of year and growth stage. Multi-year regressions were used to quantify in detail the seasonal evolution of mature grapevine biomass under the climatic conditions of the Bordeaux area, France, and for differing levels of soil nitrogen. (C) 2002 Annals of Botany Company MH - France MH - Mexico|Tabasco PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0305-7364 UR - ISI:000175274900006 L2 - non-destructive biomass estimation;allometry;regression;stem diameter;dry mass;grapevine;Vitis vinifera;LEAF-AREA; GROWTH; MODEL; GRAPEVINE; DIAMETER; FORESTS; HEIGHT SO - Annals of Botany 2002 ;89(4):401-408 5054 UI - 11794 AU - Castellano EE AU - Piro OE AU - Caram JA AU - Mirifico MV AU - Aimone SL AU - Vasini EJ AU - Marquez-Lucero A AU - Glossman-Mitnik D AD - CIMAV, LAQUICOM, Chihuahua 31109, Chih, MexicoUniv Sao Paulo, Inst Fis & Quim Sao Carlos, Dept Fis, BR-13560 Sao Carlos, SP, BrazilNatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, PROFIMO, RA-1900 La Plata, ArgentinaNatl Univ La Plata, CONICET, INIFTA, RA-1900 La Plata, ArgentinaGlossman-Mitnik, D, CIMAV, LAQUICOM, Miguel de Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Chih, Mexico TI - Crystallographic study and molecular orbital calculations of thiadiazole derivatives. 2. 3,4-diphenyl-1,2,5-thiadiazole 1-monoxide AB - Single-crystal X-ray diffraction studies are reported for 3,4-diphenyl-1,2,5-thiadiazole 1-monoxide (1). Ab initio MO calculations on the electronic structure, conformation and reactivity for this compound are also reported and compared with the X-ray results. A charge sensitivity analysis is performed on the results applying concepts derived from density functional theory (DFT), obtaining several sensitivity coefficients such as the molecular energy, net atomic charges, global and local hardness, global and local softness and Fukui functions. With these results and the analysis of the dipole moment and the total electron density and electrostatic potential maps, several conclusions have been inferred about the preferred sites of chemical reaction of the compound. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000173859500010 L2 - 1,2,5-thiadiazole 1-oxide;ab initio MO calculations;single-crystal X-ray diffraction;DFT;sensitivity analysis;1,2,5-THIADIAZOLE 1,1-DIOXIDE DERIVATIVES; DENSITY-FUNCTIONAL THEORY; CRYSTAL-STRUCTURE; ELECTROREDUCTION; HYDROLYSIS SO - Journal of Molecular Structure 2002 ;604(2-3):195-203 5055 UI - 10697 AU - Castellanos-Guzman AG AU - Czank M AU - Campa-Molina J AU - Bucio L AU - Munoz-Sandoval E AU - Escudero R AU - Kumar A AU - Singh G AU - Tiwari VS AU - Wadhawan VK AD - Univ Guadalajara, Lab Invest Mat, DIP CUCEI, Guadalajara 44281, Jalisco, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCtr Adv Technol, Laser Mat Div, Indore 452013, IndiaCastellanos-Guzman, AG, Univ Guadalajara, Lab Invest Mat, DIP CUCEI, Guadalajara 44281, Jalisco, Mexico TI - Boracites: A structural family presenting ferroic phase transitions AB - Since the early demonstration of the ferroelectric effect in boracites, the physical properties of several of these materials have extensively been studied. The purpose of this contribution is to summarize recent results on structural and thermal properties in some members of this large family of ferroics MH - Germany MH - India MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000176861100025 L2 - boracites;ferroics;phase transitions;domains;specific heat;crystal structure;CHROMIUM-CHLORINE BORACITE SO - Ferroelectrics 2002 ;267():229-236 5056 UI - 10148 AU - Castellanos L AU - de Correa RS AU - Martinez E AU - Calderon JS AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Colombia, Dept Quim, Bogota, ColombiaCalderon, JS, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ,Coyoacan, Mexico City 04510, DF, Mexico TI - Oleanane triterpenoids from Cedrela montana (Meliaceae) AB - Two new oleanane-type triterpenes, characterized as 3-oxo-11alpha,12alpha-epoxy-oleanan-28,13beta-olide and 3-oxo-olean-11-en-28,13beta-olide, were isolated from the fruits and seeds of Cedrela montana (Meliaceae). In addition, the known compounds oleanonic acid, a mixture of beta-sitosterol and stigmasterol, and the limonoid photogedunin were also isolated. The structures of the new compounds were established by spectroscopic methods, including 2D NMR MH - Colombia MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000178355500004 L2 - Cedrela montana;Meliaceae;oleanan-28,13 beta-olides;SYSTEM SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2002 ;57(7-8):575-578 5057 UI - 9678 AU - Castellanos M AU - Diaz AI AU - Terlevich E AD - Univ Autonoma Madrid, Dipartimento Fis Teor, E-28049 Madrid, SpainINAOE, Puebla 72000, MexicoCastellanos, M, Univ Autonoma Madrid, Dipartimento Fis Teor, C-XI, E-28049 Madrid, Spain TI - A comprehensive study of reported high-metallicity giant HII regions - II. Ionizing stellar populations AB - The ionizing stellar populations of 11 H II regions in the spiral galaxies: NGC 628, 925, 1232 and 1637, all of them reported to have solar or oversolar abundances according to empirical calibrations, have been analysed using stellar population synthesis models. Four of the observed regions in the sample show features which indicate the presence of a population of Wolf-Rayet (WR) stars with ages between 2.3 and 4.1 Myr. This population is sufficient to explain the emission line spectrum of the low-metallicity region H13 in NGC 628, taking into account the uncertainties involved in both observations and model computations. This is not the case for the rest of the regions for which a second ionizing population is required to simultaneously reproduce both the WR features and the emission line spectrum. Composite populations are also found for half of the regions without WR features, although in this case, the result is based only on the emission line spectrum analysis. For two of the regions showing WR features, no consistent solution is found, as the population containing WR stars produces a spectral energy distribution which is too hard to explain the emission of the gas. Several solutions are proposed to solve this problem MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000179494100016 L2 - stars : Wolf-Rayet;HII regions;galaxies : abundances;galaxies : stellar content;STAR-FORMING REGIONS; PHYSICAL PARAMETERS; MASSIVE STARS; GALAXIES; SPECTROSCOPY; EVOLUTION; MODELS; ABUNDANCES; CLUSTERS; NEBULAE SO - Monthly Notices of the Royal Astronomical Society 2002 ;337(2):540-552 5058 UI - 11868 AU - Castellanos M AU - Diaz AI AU - Tenorio-Tagle G AD - Univ Autonoma Madrid, Dept Fis Teor CXI, E-28049 Madrid, SpainInst Nacl Astrofis Opt & Elect, Peubla 72000, MexicoCastellanos, M, Univ Autonoma Madrid, Dept Fis Teor CXI, E-28049 Madrid, Spain TI - On the large escape of ionizing radiation from giant extragalactic HII regions AB - A thorough analysis of well-studied disk giant H II regions, for which we know the ionizing stellar population, gas metallicity, and Wolf-Rayet population, leads to photoionization models that can only match all observed line intensity ratios ([O III], [O II], [N II], [S II], and [S III] with respect to the intensity of Hbeta), as well as the Hbeta luminosity and equivalent width if one allows for an important escape of energetic ionizing radiation. For the three regions presented here, the fractions of escaping Lyman continuum photons amount to 10%-73%, and in all cases, the larger fraction of escaping photons has energies of between 13.6 and 24.4 eV. These escaping photons clearly must have an important impact as sources of ionization of the diffuse ionized gas found surrounding many galaxies, as well as of the intergalactic medium MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173766600004 L2 - galaxies : individual (NGC 628, NGC 1232, NGC 4258);galaxies : ISM;HII regions;intergalactic medium;stars : Wolf-Rayet;H-II REGIONS; STARBURST GALAXIES; SPIRAL GALAXIES; LYMAN CONTINUUM; STAR-FORMATION; SUPERBUBBLES; CLUSTERS; ALPHA; GAS SO - Astrophysical Journal 2002 ;565(2):L79-L82 5059 UI - 11882 AU - Castellanos M AU - Diaz AI AU - Terlevich E AD - Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, SpainINAOE, Puebla 72000, MexicoCastellanos, M, Univ Autonoma Madrid, Dept Fis Teor, C-XI, E-28049 Madrid, Spain TI - A comprehensive study of reported high-metallicity giant HII regions - 1. Detailed abundance analysis AB - We present long-slit observations in the optical and near-infrared of 14 H II regions in the spiral galaxies NGC 628, 925, 1232 and 1637, all of them reported to have solar or oversolar abundances according to empirical calibrations. For seven of the observed regions, ion-weighted temperatures from optical forbidden auroral to nebular line ratios are obtained and, for six of them, the oxygen abundances derived by standard methods turn out to be significantly lower than solar. The other one, named CDT1 in NGC 1232, shows an oxygen abundance of 12 + log(O/H) = 8.95 +/- 0.20, and constitutes, to the best of our knowledge, the first high-metallicity H II region for which accurate line temperatures, and hence elemental abundances, have been derived. For the rest of the regions no line temperature measurements could be made, and the metallicity has been determined by means of both detailed photoionization modelling and the sulphur abundance parameter S-23. Only one of these regions shows values of O-23 and S-23 implying a solar or oversolar metallicity. According to our analysis, only two of the observed regions can therefore be considered as of high metallicity. These two fit the trends previously found in other high-metallicity H II regions, i.e., N/O and S/O abundance ratios seem to be higher and lower than solar respectively MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 40 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000173587400012 L2 - HII regions;galaxies : abundances;H-II REGIONS; SPIRAL GALAXIES; EMISSION-LINES; COMPOSITION GRADIENT; CHEMICAL ABUNDANCES; NEBULAR ABUNDANCES; SOUTHERN GALAXIES; HELIUM ABUNDANCE; DISK GALAXIES; STARS SO - Monthly Notices of the Royal Astronomical Society 2002 ;329(2):315-335 5060 UI - 10250 AU - Castelli MV AU - Cortes JCG AU - Escalante AM AU - Bah M AU - Pereda-Miranda R AU - Ribas JC AU - Zacchino SA AD - Univ Nacl Rosario, Fac Ciencias Bioquim & Farmaceut, RA-2000 Rosario, Santa Fe, ArgentinaUniv Salamanca, Inst Microbiol Bioquim, CSIC, E-37008 Salamanca, SpainUniv Autonoma Queretaro Mexico, Dept Quim & Farmacol Prod Nat, Fac Quim, Queretaro, MexicoUniv Nacl Autonoma Mexico, Dept Farm, Fac Quim, Mexico City 04510, DF, MexicoZacchino, SA, Univ Nacl Rosario, Fac Ciencias Bioquim & Farmaceut, Suipacha 531, RA-2000 Rosario, Santa Fe, Argentina TI - In vitro inhibition of 1,3-beta-glucan synthase by glycolipids from convolvulaceous species AB - Sixteen convolvulaceous glycolipids selected from the tricolorin (1-7) and orizabin (8-16) series, proved to be strong in vitro inhibitors of the enzyme that catalyzes the synthesis of 1,3-beta-D-glucan, a major polymer of fungal cell-walls. Results provide an insight into function of the specific structures of these complex macrocyclic lactones as inhibitors of the 1,3-beta-D-glucan synthase and open the possibility of using these compounds as starting points for the development of antifungal agents that act by inhibiting fungal cell-wall synthesis MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0032-0943 UR - ISI:000177914300016 L2 - IPOMOEA TRICOLOR CONVOLVULACEAE; FUNGAL CELL-WALL; PAPULACANDIN-B; SCHIZOSACCHAROMYCES-POMBE; ANTIFUNGAL EVALUATION; GLUCAN SO - Planta Medica 2002 ;68(8):739-742 5061 UI - 9110 AU - Castello R AU - Mili R AU - Tollis IG AD - Inst Technol & Higher Educ, Dept Comp Sci, Monterrey, MexicoUniv Texas, Dept Comp Sci, Richardson, TX 75083, USACastello, R, Inst Technol & Higher Educ, Dept Comp Sci, Monterrey, Mexico TI - ViSta MH - Mexico|Nuevo Leon MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000181204500056 SO - Graph Drawing 2002 ;2265():481-482 5062 UI - 10881 AU - Castello R AU - Mili R AU - Tollis IG AD - Grad Sch, Chihuahua 31300, MexicoUniv Texas, Dept Comp Sci, Richardson, TX 75083, USAMili, R, Grad Sch, ITESM Campus Chihuahua,H Colegio Militar 4700, Chihuahua 31300, Mexico TI - ViSta: a tool suite for the visualization of behavioral requirements AB - ViSta is a tool suite designed to support the requirements specification phase of reactive systems. It enables the user to prepare and analyze a diagrammatic description of requirements using the statechart notation. ViSta includes a template wizard, a graphical editor and a statechart visualization tool. The template wizard guides the user through the steps necessary for the extraction of relevant information from a textual description of requirements. This information is stored in a database that is used by the statechart visualization tool to automatically generate statechart layouts. The statechart visualization tool offers a Framework that combines hierarchical drawing, labeling, and floorplanning techniques. Hence, the automatically produced drawings enjoy several important aesthetic properties: they emphasize the natural hierarchical decomposition of states into substates; they have a low number of edge crossings; they have a good aspect ratio, and require a small area. These aesthetic features are invaluable since they allow the user to shift focus from organizing the mental or physical structure of the requirements document to its analysis. (C) 2001 Elsevier Science Inc. All rights reserved MH - Mexico|Chihuahua MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Software Engineering;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0164-1212 UR - ISI:000176242500001 L2 - DIRECTED-GRAPHS; SYSTEMS; LAYOUT SO - Journal of Systems and Software 2002 ;62(3):141-159 5063 UI - 9595 AU - Castillo-Juarez H AU - Oltenacu PA AU - Cienfuegos-Rivas EG AD - Cornell Univ, Ithaca, NY 14853, USADept Anim Sci, Ithaca, NY 14853, USAUniv Autonoma Tamaulipas, Ciudad Victoria, Tamaulipas, MexicoOltenacu, PA, Cornell Univ, B 21 Morrison Hall, Ithaca, NY 14853, USA TI - Genetic and phenotypic relationships among milk production and composition traits in primiparous Holstein cows in two different herd environments AB - Genotype by environment interactions for mature equivalent milk yield (MEM), mature equivalent protein yield (MEP), mature equivalent fat yield (MEF), protein percentage (P%), fat percentage (F%), and lactation mean somatic cell score (LMSCS) were studied using 248 230 first parity records of Holstein cows calving from 1987 to 1994, daughters of 588 sires in 3042 herds. Herds were classified into low and high yield environment classes. Genetic parameters were estimated with bivariate linear mixed models using the multiple trait derivative free software (MTDFREML). For low yield environment herds, heritabilities for MEM, MEP, MEF, P%, F% and LMSCS were 0.22, 0.20, 0.23, 0.51, 0.58 and 0.11, while for high yield environment herds they were 0.30, 0.27, 0.27, 0.56, 0.56 and 0.09. All genetic correlations, except between MEM and P% and F%, were different in low and high yield environment herd classes. These results indicate that differences in management between the two herd environment classes modify the genetic expression of the traits studied and their genetic association. This suggests that, when these traits are considered in a selection index, appropriate weights for these traits depend on the herd environment class. These results also indicate that different correlated responses for MEP, MEF and LMSCS are expected in, high relative to low yield environment herds when selection is based on MEM only. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Tamaulipas MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0301-6226 UR - ISI:000179783800004 L2 - cattle;genetics;milk yield;milk constituents;somatic cell score;management;genotype by environment interaction;SOMATIC-CELL SCORE; CLINICAL MASTITIS; DAIRY-CATTLE; ANIMAL-MODEL; PROTEIN YIELD; UNITED-STATES; PARAMETERS; FAT; COUNT SO - Livestock Production Science 2002 ;78(3):223-231 5064 UI - 9297 AU - Castillo-Toledo B AU - Di Gennaro S AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Guadalajara, Guadalajara 44550, Jalisco, MexicoUniv Aquila, Dipartimento Ingn Elettr, I-67040 Laquila, ItalyCastillo-Toledo, B, IPN, Ctr Invest & Estudios Avanzados, Unidad Guadalajara, Av Lopez Mateos Sur 590,AP 31-438, Guadalajara 44550, Jalisco, Mexico TI - On the nonlinear ripple-free sampled-data robust regulator AB - In this paper, we present a control scheme for robust regulation of a discretized nonlinear system ensuring a ripple-free behavior in the intersampling time. We show that, as in the case of linear systems, the controller must contain an internal model to ensure that the continuous output tracking error decays asymptotically to zero. We also show that under certain conditions, a linear controller obtained from the discretization of the linear approximation of the nonlinear system, guarantees the robust regulation MH - Italy MH - Mexico|Jalisco PB - PARIS: HERMES SCIENCE PUBLICATION RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0947-3580 UR - ISI:000180631700005 L2 - exponential holder;nonlinear digital control;robust regulator theory;DATA SYSTEMS; DESIGN; CONTROLLERS; TRACKING SO - European Journal of Control 2002 ;8(1):44-55 5065 UI - 10343 AU - Castillo A AU - Infante F AU - Barrera JF AU - Carta L AU - Vega FE AD - El Colegion Fronter Sur, ECOSUR, Tapachula 30700, Chiapas, MexicoUSDA ARS, Nematol Lab, Beltsville, MD 20705, USAUSDA ARS, Insect Biocontrol Lab, Beltsville, MD 20705, USACastillo, A, El Colegion Fronter Sur, ECOSUR, Currectera Antiguo Aeropuerto,Km 2-5, Tapachula 30700, Chiapas, Mexico TI - First field report of a nematode (Tylenchida : Sphaerularioidea) attacking the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera : Scolytidae) in the Americas MH - Mexico|Chiapas MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000177791300009 SO - Journal of Invertebrate Pathology 2002 ;79(3):199-202 5066 UI - 10889 AU - Castillo RA AU - Cordero C AU - Dominguez CA AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Sonora, Dept Invest Cient & Tecnol, Hermosillo, Sonora, MexicoUniv Autonoma Estado Morelos, CEAMISH, Cuernavaca, Morelos, MexicoUniv Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA, USADominguez, CA, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, AP 70-275, Mexico City 04510, DF, Mexico TI - Are reward polymorphisms subject to frequency- and density-dependent selection? Evidence from a monoecious species pollinated by deceit AB - Most deceit-pollinated species involve floral dimorphisms characterized by the presence of rewarding male flowers and nonrewarding female flowers. It has been proposed that this polymorphism establishes the conditions for the action of frequency dependent selection (FDS). The tendency of foraging animals to aggregate in areas of high resource density suggests that pollination efficiency and fruit production may be positively influenced by flower density (density dependent selection, DDS). In this paper we offer a graphical model describing the effects of FDS and DDS on a monoecious species pollinated by deceit. We test the FDS and DDS assumptions and the predictions of the model using field observations and experimental populations of Begonia gracilis in which population sex ratio and flower density were controlled. We found a marked effect of both FDS and DDS on pollinator visitation, fruit-set, and on the probability of female flowers to setting fruits. We conclude that these two types of selection have had a strong influence on the evolution of deceit-pollinated species MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Sonora MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1010-061X UR - ISI:000176319800005 L2 - Begonia;deceit pollination;density dependent selection;frequency dependent selection;POPULATION-SIZE; REPRODUCTIVE SUCCESS; TROPICAL SHRUB; PLANT-DENSITY; PATCH SIZE; SEED-SET; LIMITATION; BEHAVIOR; POLLEN; COMPETITION SO - Journal of Evolutionary Biology 2002 ;15(4):544-552 5067 UI - 10047 AU - Castro-Borges P AU - de Rincon OT AU - Moreno EI AU - Torres-Acosta AA AU - Martinez-Madrid M AU - Knudsen A AD - IPN, CINVESTAV, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, VenezuelaUniv Zulia, Fac Engn, Corros Study Ctr, Maracaibo 4011, Zulia, VenezuelaUniv Autonoma Yucatan, Fac Ingn, Merida, Yucatan, VenezuelaInst Mexixano Transporte, Secretaria Comun & Transportes, Queretaro, MexicoRAMBOLL, Bridge Maintenance & Concrete Technol, DK-2380 Virum, DenmarkCastro-Borges, P, IPN, CINVESTAV, Unidad Merida, Dept Fis Aplicada, Km 6 Antigua Carretera Prog, Merida 97310, Yucatan, Venezuela TI - Performance of a 60-year-old concrete pier with stainless steel reinforcement AB - A 60-year old concrete pier, constructed with stainless steel reinforcing bars (rebar) and exposed to a tropical marine environment, has shown good performance during its service life. This article describes the tests carried out on the pier during this investigation. The tests included visual inspection, chloride content determination, and concrete resistivity as well as electrochemical measurements to the rebar. The authors also discus durability issues on the pier, based on the results obtained MH - Denmark MH - Mexico|Queretaro MH - Venezuela PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0094-1492 UR - ISI:000178529000025 L2 - PENINSULA; YUCATAN; MEXICO SO - Materials Performance 2002 ;41(10):50-55 5068 UI - 10702 AU - Castro-Garza J AU - King CH AU - Swords WE AU - Quinn FD AD - Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Div AIDS STD & TB Lab Res, Atlanta, GA 30333, USAIMSS, Ctr Invest Biomed Noreste, Div Biol Celular & Mol, Monterrey, Nuevo Leon, MexicoEmory Univ, Div Infect Dis, Atlanta, GA 30303, USAQuinn, FD, Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Div AIDS STD & TB Lab Res, Mailstop F08, Atlanta, GA 30333 USA TI - Demonstration of spread by Mycobacterium tuberculosis bacilli in A549 epithelial cell monolayers AB - We developed an in vitro tissue-culture model to analyze the process involved in mycobacterial spread through lung epithelial cell monolayers. A549 cells were infected with low numbers of viable Mycobacterium tuberculosis bacilli expressing the gfp gene. Subsequent addition of a soft agarose overlay prevented the dispersal of the bacilli from the initial points of attachment. By fluorescence microscopy the bacteria were observed to infect and grow within the primary target cells; this was followed by lysis of the infected cells and subsequent infection of adjacent cells. This process repeated itself until an area of clearing (plaque formation) was observed. The addition of amikacin after initial infection did not prevent intracellular growth; however, subsequent plaque formation was not observed. Plaque formation was also observed after infection with Mycobacterium bovis BCG bacilli, but the plaques were smaller than those formed after infection with M. tuberculosis. These observations reinforce the possibility that cell-to-cell spreading of M. tuberculosis bacilli, particularly early in the course of infection within lung macrophages, pneumocytes, and other cells, may be an important component in the infectious process. (C) 2002 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000176884700001 L2 - Mycobacterium tuberculosis;virulence;human lung epithelial cell;plaque;green fluorescent protein;SMALL-PLAQUE MUTANTS; LISTERIA-MONOCYTOGENES; INTRACELLULAR GROWTH; VIRULENT; MACROPHAGES; INFECTION; INVASION; STRAINS; ASSAY SO - Fems Microbiology Letters 2002 ;212(2):145-149 5069 UI - 10275 AU - Castro AJ AU - Chen XM AU - Hayes PM AU - Knapp SJ AU - Line RF AU - Toojinda T AU - Vivar H AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USAWashington State Univ, USDA, Pullman, WA 99164, USAKasetsart Univ, Natl Ctr Genet Engn & Biotechnol, DnA Fingerprinting Unit, Nakhon Pathom, ThailandCIMMYT, ICARDA, Mexico City 06600, DF, MexicoHayes, PM, Oregon State Univ, Dept Crop & Soil Sci, 253 Crop Sci Bldg, Corvallis, OR 97331 USA TI - Coincident QTL which determine seedling and adult plant resistance to stripe rust in barley AB - Barley stripe rust (caused by Puccinia striiformis Westend. f. sp. hordei) is an important disease of barley (Hordeum vulgare L. subsp. vulgare). This disease reached the Americas in 1975. It is now endemic from the Andean region of South America to western North America. We are systematically, mapping quantitative resistance genes present in ICARDA/CIMMYT germplasm and introgressing these genes into barley germplasm adapted to western North America. Resistance to stripe rust in the Triticeae can he race- and growth-stage specific. In this study, we mapped genes conferring resistance at the seedling stage, after inoculation with defined isolates (PSII-I, PSH-13, PSH-14), in a doubled haploid population in which adult plant resistance genes had previously been mapped. The disease reaction data for each of three isolates fit a 3:1 (susceptible: resistant) ratio, indicating that two genes are required for resistance. Quantitative trait loci (QTL) effects and significance were estimated by means of QTL mapping procedures and logistic regression analysis, taking into account the binomial distribution of the trait. Two resistance QTL ne on chromosome 5 (511) and one on chromosome 6 (6H)-were detected and in all cases 'Shyri' contributed the resistance alleles. No QTL X race interaction was detected. The two seedling resistance QTL map to the same regions of the genome as two of the four adult plant resistance QTL. These data Jay the foundation for more detailed analyses directed at unraveling the genetics of qualitative and quantitative disease resistance mechanisms MH - Mexico|Distrito Federal MH - USA MH - Thailand PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000177928000044 L2 - F-SP HORDEI; QUANTITATIVE TRAIT LOCI; PUCCINIA-STRIIFORMIS; HIGH-TEMPERATURE; VULGARE L; GENES; WHEAT; INHERITANCE; CHARACTERS; VIRULENCE SO - Crop Science 2002 ;42(5):1701-1708 5070 UI - 10155 AU - Castro CG AU - Baumgartner TR AU - Bograd S AU - Castro R AU - Chavez FP AU - Collins CA AU - Durazo R AU - Garcia J AU - Gaxiola-Castro G AU - Hayward T AU - Huyer A AU - Lynn R AU - Mascarenhas AS AU - Robert MRD AU - Smith RL AU - Wheeler PA AU - Whitney FA AD - USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943, USAMonterey Bay Aquarium Res Inst, Moss Landing, CA 95039, USACtr Invest Cientifica & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Marine Life Res Grp, La Jolla, CA 92093, USANOAA, NMFS, Pacific Fisheries Environm Lab, Pacific Grove, CA 93950, USAUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoOregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331, USANatl Marine Fisheries Serv, NOAA, La Jolla, CA 92038, USAInst Ocean Sci, Sidney, BC V8L 4B2, CanadaCastro, CG, USN, Postgrad Sch, Dept Oceanog, 833 Dyer Rd,Rm 328, Monterey, CA 93943 USA TI - Introduction to 'The 1997-8 El Nino Atlas of oceanographic conditions along the west coast of North America (23 degrees N-50 degrees N)' AB - Hydrographic data collected along the West Coast of North America between January 1997 and January 1999 have been compiled into a web-based Atlas of the 1997-8 El Nino event. This paper discusses the organization of the Atlas, describes the data that were incorporated into the Atlas and explains how vertical and horizontal distributions for the different properties were constructed. Examples of figures from the Atlas are shown. (C) 2002 Elsevier Science Ltd. All rights reserved MH - USA MH - Canada MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography U5 - J;Article AV - English IS - 0079-6611 UR - ISI:000178308900027 SO - Progress in Oceanography 2002 ;54(1-4):503-511 5071 UI - 10310 AU - Castro GL AU - Mayorga HB AU - Munoz JH AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Tolima, Dept Fis, Ibague 546, ColombiaCastro, GL, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Non-leptonic decays of the Bc into tensor mesons AB - We have computed the branching ratios of the exclusive pseudoscalar (vector) + tensor modes that are allowed in the decays of the B-C meson. The dominant spectator and annihilation contributions in those decays are evaluated using the factorization hypothesis. We find that some of these decay channels, such as B-c(- -->) (rho(-), D-s(*-), D-s(-))chi(c2) and B-c(-) --> pi-<(B(s2)(*0))over bar>, have branching ratios of the order of 10-4, which seems to be within the reach of forthcoming experiments at the LHC. The inclusive branching fraction of the two-body B-c decays involving tensor particles is approximately 1.28 x 10(-3). At the dynamical level, it is interesting to observe that the exclusive decays B-c(-) --> K-(pi(-))<(D-2(*0))over bar>, pi(0)D(2)(*-), eta'D-s2(*-) dominated by the annihilation contributions MH - Colombia MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0954-3899 UR - ISI:000177913600012 L2 - C-MESON; WEAK DECAYS; HADRONIC DECAYS; QUARK-MODEL; QCD; FRAGMENTATION; PSEUDOSCALAR; EXCHANGE; PHYSICS SO - Journal of Physics G-Nuclear and Particle Physics 2002 ;28(8):2241-2248 5072 UI - 11756 AU - Castro RR AU - Monachesi G AU - Trojani L AU - Mucciarelli M AU - Frapiccini M AD - CICESE, Div Ciencias Tierra, Ensenada 22860, Baja California, MexicoOsservatorio Geofis Sperimentale Macerata, I-62100 Macerata, ItalyUniv Basilicata, I-85100 Potenza, ItalyCastro, RR, CICESE, Div Ciencias Tierra, Apdo Postal 2732, Ensenada 22860, Baja California, Mexico TI - An attenuation study using earthquakes from the 1997 Umbria-Marche sequence AB - We studied spatial and temporal characteristics of seismic attenuation in Central Italy using S- and coda- waves recorded by the Marchesan Seismograph Network from earthquakes located in the epicentral area of the 1997 Umbria-Marche sequence. The amplitude decay of the S waves with distance was defined calculating empirical attenuation functions at 15 frequencies between 1 and 25 Hz. We analyzed separately foreshocks and aftershocks and we found the same attenuation functions, suggesting that the possible temporal variations could be confined in a small area. The frequency dependence of Q(s) was approximated by the equation Q(s) = 18 . f(2.0) between 1 and 10 Hz. At higher frequencies (10-25 Hz), the frequency dependence of Q(s) weakens, having an average value of (Q) over bars = 990. We also estimated Qs from coda waves (Q(c)) using the single-scattering models of Aki and Chouet (1975) and Sato (1977). We found that Q(c) = 77 . f(0.6), (between 2 and 20 Hz) at the western side of the mountain chain, using either foreshocks or aftershocks. This relation is consistent with previous estimates of Q(c) reported for the Central Apennines. For a volume sampling the Colfiorito basin, the Apennines and the Marche region we found that Q(c) = 55 . f(0.8), indicating high attenuation below the mountain belt. To detect small temporal changes of Q, we calculated spectral ratios of 5 temporal doublets located in the epicentral area and recorded at the closest station. We found temporal changes of Q that vary from 27% to 56%, depending on the location of the doublets. This variability suggests that the temporal change of attenuation may depend on the spatial variation of Q and perhaps on the spatial distribution of tectonic stress in the epicentral area MH - Italy MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 15 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1383-4649 UR - ISI:000173991200004 L2 - coda waves;Q,S-wave attenuation;Umbria-Marche sequence;S-WAVE ATTENUATION; CODA WAVES; TEMPORAL VARIATIONS; FAULT-ZONE; SCATTERING; SITE; LITHOSPHERE; REGION; CALIFORNIA; MAGNITUDE SO - Journal of Seismology 2002 ;6(1):43-59 5073 UI - 11291 AU - Cata GF AU - Lorenzo GR AU - Odriozola JA AU - Alvarez LJ AD - Univ Nacl Autonoma Mexico, Inst Matemat, Lab Simulat Mat, Unidad Cuernavaca, Cuernavaca 62210, Morelos, MexicoInst Super Ciencias & Tecnol Nucl, Havana, CubaUniv Sevilla, CSIC, Inst Ciencia Mat Sevilla, E-41012 Seville, SpainAlvarez, LJ, Univ Nacl Autonoma Mexico, Inst Matemat, Lab Simulat Mat, Unidad Cuernavaca, Av Univ S-N,Lomas Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Charge-transfer molecular dynamics of aluminium nitride AB - Charge-transfer molecular dynamics simulations of AlN were performed in the microcanonical ensemble with a nonstoichiometric and defective system in order to achieve a realistic representation of the material. Structural properties and the infrared and nuclear magnetic resonance spectra were calculated. The results suggest that the degree of nonstoichiometry and the population of defects may produce considerable effects on the experimental studies using IR and Al-27 NMR techniques. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000175331000018 L2 - RAMAN-SCATTERING; ALN; FILMS; SEMICONDUCTORS; COMPLEXES SO - Chemical Physics Letters 2002 ;356(1-2):127-132 5074 UI - 11442 AU - Cata GF AU - Lorenzo GR AU - Odriozola JA AU - Alvarez LJ AD - Inst Super Ciencias & Technol Nucl, Havana, CubaUniv Sevilla, CSIC, Inst Ciencia Mat Sevilla, E-41012 Seville, SpainUniv Cuernavaca, Lab Simulac Mat, Inst Matemat, Unidad Cuernavaca, Cuernavaca 62210, Morelos, MexicoCata, GF, Inst Super Ciencias & Technol Nucl, Av Salvador Allende & Luaces, Havana, Cuba TI - Charge-transfer interaction potential for AIN AB - A realistic representation of nitrides in all forms, crystalline and amorphous demands the use of interaction potentials which are able to properly reproduce the local changes in coordination that take place in this important family of materials. In order to extend the collection of charge-transfer interaction potentials to be able to simulate nitrides and oxynitrides, the AlN interaction potential of this kind has been parameterised. Some preliminary results which validate its capabilities to reproduce basic characteristics of this material are presented MH - Cuba MH - Mexico|Morelos MH - Spain PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000174813000022 L2 - aluminium nitride;charge transfer;molecular dynamics;TRANSFER MOLECULAR-DYNAMICS SO - Nitrides and Oxynitrides 2 2002 ;383():171-175 5075 UI - 10754 AU - Ceballos A AU - Gaitan L AU - Ceballos L AD - Univ Granada, E-18071 Granada, SpainNatl Autonomous Univ Mexico, Mexico City 04510, DF, Mexico TI - Oral lesions in HIV plus /AIDS patients under highly active antiretroviral therapy for long time MH - Mexico|Distrito Federal MH - Spain PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Meeting Abstract AV - English IS - 0022-0345 UR - ISI:000176024701729 SO - Journal of Dental Research 2002 ;81():A229-A229 5076 UI - 11234 AU - Ceballos G AU - Ehrlich PR AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoStanford Univ, Dept Biol Sci, Stanford, CA 94305, USACeballos, G, Univ Nacl Autonoma Mexico, Inst Ecol, Apdo Postal 70-275, Mexico City 04510, DF, Mexico TI - Mammal population losses and the extinction crisis AB - The disappearance of populations is a prelude to species extinction. No geographically explicit estimates have been made of current population tosses of major indicator taxa. Here we compare historic and present distributions of 173 declining mammal species from six continents. These species have collectively lost over 50% of their historic range area, mostly where human activities are intensive. This implies a serious loss of ecosystem services and goods. It also signals a substantial threat to species diversity MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 83 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000175442500042 L2 - RISK; BIODIVERSITY; DIVERSITY; AUSTRALIA; PATTERNS; DYNAMICS SO - Science 2002 ;296(5569):904-907 5077 UI - 12181 AU - Ceccarelli C AU - Vastel C AU - Tielens AGGM AU - Castets A AU - Boogert ACA AU - Loinard L AU - Caux E AD - Observ Bordeaux, F-33270 Florac, FranceUPS, CNRS, CESR, F-31028 Toulouse, FranceSRON, NL-9700 AV Groningen, NetherlandsCALTECH, Downs Lab Phys 320 47, Pasadena, CA 91125, USAUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCeccarelli, C, Observ Bordeaux, BP 89, F-33270 Florac, France TI - The puzzling detection of D2CO in the molecular cloud L1689N AB - We present new observations of the D2CO emission towards the small cloud L1689N in the rho Ophiuchus complex. We surveyed five positions, three being a cut across a shock site and two probing the quiescent gas of the molecular cloud. We detected D2CO emission in the first three positions. The measured [D2CO]/[H2CO] is about 3%, whereas it is less than or equal to 2% in the quiescent gas. We discuss the implications of these new observations, which suggest that the bulk of the D2CO molecules is stored in grain mantles, and removed from the cold storage by the shock at the interface between the out owing and quiescent gas. We review the predictions of the published models proposed to explain the observed high deuteration of formaldehyde. They fall in two basic schemes: gas phase and grain surface chemistry. None of the reviewed models is able to account for the observed [D2CO]/[H2CO] abundance ratio. A common characteristics shared by the models is apparently that all underestimate the atomic [D]/[H] ratio in the accreting gas MH - France MH - Mexico|Michoacan MH - Netherlands MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000172791100005 L2 - ISM : abundances;ISM : molecules;stars : formation;ISM : individual : L1689N;SURFACE-CHEMISTRY; FORMALDEHYDE; ABUNDANCE; IRAS-16293-2422 SO - Astronomy & Astrophysics 2002 ;381(1):L17-L20 5078 UI - 9855 AU - Cediel E AU - Vazquez-Cruz B AU - Navarro-Cid J AU - De Las Heras N AU - Sanz-Rosa D AU - Cachofeiro V AU - Lahera V AD - Univ Complutense, Dept Fisiol, Fac Med, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Dept Pharmacol FES Iztacala, Tlalnepantla, MexicoLahera, V, Univ Complutense, Dept Fisiol, Fac Med, E-28040 Madrid, Spain TI - Role of endothelin-1 and thromboxane A(2) in renal vasoconstriction induced by angiotensin II in diabetes and hypertension AB - Background. Interactions among angiotensin II (Ang II), endothelin-1 (ET-1) and thromboxane A(2) (TXA(2)) may play an important role in the regulation of renal function. The present study investigated the participation of TXA(2) and ET-1 in the increase in renal vascular resistances (RVR) induced by Ang II, as well as the consequences of diabetes, hypertension, and the combination of both on this response. Methods. Isolated kidneys from male normoglycemic or streptozotocin-induced diabetic Wistar-Kyoto rats (WKY) and spontaneously hypertensive rats (SHR) were used. The increase in perfusion pressure (PP) produced by Ang II was studied in the absence or presence of the TXA(2) receptor antagonist, ifetroban, or the ETA/ETB receptor antagonist, PD145065. Results. Systolic arterial pressure (SAP) was higher in SHR than in WKY, but diabetic rats (D) from each strain showed lower SAP values than their respective non-diabetic rats. Basal renal PP was higher in WKY and SHR than in WKY-D and SHR-D. Increases in renal PP produced by Ang II were comparable in the kidneys from all groups. Either ifetroban or PD145065 reduced the maximal Ang II response in all animals. The maximal inhibitory effect of ifetroban was higher (P < 0.05) in WKY than in the other groups. However, the maximal inhibitory effect of PD145065 was lower in SHR than in the other groups. Conclusion. This study supports a role for ET-1 and TXA(2) as mediators of the increase in renal vascular resistance produced by Ang II. These results indicate that the participation of ET-1 in the renal vasoconstriction produced by Ang II was reduced under hypertensive conditions, and that of TXA(2) was reduced by both diabetes and hypertension MH - Mexico|Estado De Mexico MH - Spain PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000179106800002 L2 - kidney;hypertension;diabetes;renal vascular resistance;arterial pressure;arterial pressure;chronic renal disease;PERFUSED KIDNEYS; VASCULAR REACTIVITY; BLOOD-PRESSURE; RATS; STREPTOZOTOCIN; BLOCKADE; RESPONSIVENESS; RESISTANCE; RESPONSES; MELLITUS SO - Kidney International 2002 ;62():S2-S7 5079 UI - 11273 AU - Ceniceros-Gomez AE AU - del Rio-Portilla F AU - Hansson O AU - Castillo-Blum SE AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Gothenburg, Dept Chem, SE-40530 Gothenburg, SwedenCastillo-Blum, SE, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Electron transfer between plastocyanin and benzimidazolic coordination compounds in DMSO-H2O AB - The electron transfer reactions between several chromium(III), iron(III) and cobalt(III) coordination compounds and spinach plastocyanin (PC) were studied. The ligands coordinated to the metal ions are derivatives of benzimidazole. Kinetic studies were carried out in dimethyl sulphoxide-H2O (25:75%) and the reaction mechanism is discussed. For comparison with previous studies, the reaction of [Co(phen)(3)](3+) with PC was studied both in aqueous buffer solution and in dimethyl sulphoxide-H2O (25:75%), the results indicated that the electron transfer is accelerated in reactions carried out in the latter medium. [Fe(2gb)(3)](NO3)(3), 2gb = 2-guanidinobenzimidazole, and [Fe(ntb)Cl-2]Cl, ntb = tris(benzimidazolyl)methylamine oxidised PC following a simple second order outer sphere mechanism. The rate constants for electron transfer are 1.4 x 10(4) +/- 1.1 x 10(2) and 706.2 +/- 12.7 M-1 s(-1) respectively. Cobalt(III) and chromium(III) benzimidazolic compounds behaved as inhibitors to the electron transfer process. NMR studies indicated that the conformation of the protein does not change in DMSO-H2O (25:75% v/v) when compared with that in aqueous buffer. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Sweden PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000175179700010 L2 - plastocyanin;benzimidazolic compounds;electron transfer;kinetics;BLUE COPPER PROTEINS; HIGHER-PLANT PLASTOCYANINS; SPINACH PLASTOCYANIN; PARSLEY PLASTOCYANIN; BINDING-SITES; X-RAY; COMPLEXES; OXIDATION; H-1-NMR; IONS SO - Inorganica Chimica Acta 2002 ;331():59-64 5080 UI - 11529 AU - Centurion D AU - Ortiz MI AU - Saxena PR AU - Villalon CM AD - CINVESTAV, IPN, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Univ, Dept Pharmacol, Fac Med & Hlth Sci, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, CINVESTAV, IPN, Dept Farmacobiol, Czda Tenorios 235, Mexico City 14330, DF, Mexico TI - The atypical 5-HT2 receptor mediating tachycardia in pithed rats: pharmacological correlation with the 5-HT2A receptor subtype AB - 1 In pithed rats, 5-HT mediates tachycardia both directly (by 5-HT2 receptors) and indirectly (by a tyramine-like effect). The receptor mediating tachycardia directly has been classified as an 'atypical' 5-HT2 receptor since it was 'weakly' blocked by ketanserin. Moreover, 1-(2.5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI), a 5-HT2 agonist, failed to mimic 5-HT-induced tachycardia. Since 5-HT, receptors consist of 5-HT2A, 5-HT2B and 5-HT2C subtypes, this study investigated if these subtypes mediate the above response. 2 In pithed rats, intraperitoneally (i.p,) pre-treated with reserpine (5 mg kg(-1)), intravenous (i.v.) administration of 5-HT, 5-methoxytryptamine (5-MeO-T), 1-(3-chlorophenyl) piperazine (mCPP) and 5-carboxamidotryptamine (5-CT) (10, 30, 100 and 300 mug kg(-1) each), produced dose-dependent tachycardic responses. Interestingly, DOI (10 - 1000 mug kg(-1), i.v.) induced only slight, dose-unrelated, tachycardic responses, whilst the 5-HT2C agonist, Ro 60-0175 (10 - 1000 mug kg(-1), i.v.), produced a slight tachycardia only at 300 and 1000 mug kg(-1). In contrast, sumatriptan and 1-(m-trifluoromethylphenyl)- piperazine (TFMPP) were inactive. The rank order of potency was: 5-HT greater than or equal to 5-MeO-T > mCPP greater than or equal to 5-CT greater than or equal to DOI > Ro 60-0175. 3 The tachycardic responses to 5-HT, which remained unaffected after i.v. saline (0.3 and 1 ml kg(-1)) or propranolol (3 mg kg(-1)), were selectively blocked by the 5-HT2A antagonists ketanserin (30 and 100 mug kg(-1)) or spiperone (10 and 30 mug kg(-1)) as well as by the non-selective 5-HT2 antagonists, ritanserin (10 and 30 mug kg(-1)) or mesulergine (100 mug kg(-1)). Remarkably, these responses were unaffected by the antagonists rauwolscine (5-HT2B), SB204741 (5-HT2B/2C) or Ro 046790 (5-ht(6)) (300 and 1000 mug kg(-1) each). 4 These results suggest that the 'atypical' 5-HT2 receptors mediating tachycardia in reserpinized pithed rats are pharmacologically similar to the 5-HT2A receptor subtype MH - Mexico|Distrito Federal MH - Netherlands PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000174644400024 L2 - ketanserin;5-HT;5-HT2A receptors;Ro 04-6790;Ro 60-0175;SB204741;spiperone;cardiac serotonin receptors;5-HYDROXYTRYPTAMINE; SEROTONIN; AGONIST; CLASSIFICATION; RADIOLIGAND; ANTAGONISTS; MEMBRANES; BINDING; HEART; DOI SO - British Journal of Pharmacology 2002 ;135(6):1531-1539 5081 UI - 11923 AU - Cerdeira A AU - Estrada M AU - Quintero R AU - Flandre D AU - Ortiz-Conde A AU - Sanchez FJG AD - IPN, CINVESTAV, SEES, Dept Ingn Elect, Mexico City 07300, DF, MexicoUniv Catholique Louvain, Microelect Lab, B-1348 Louvain, BelgiumUniv Simon Bolivar, LEES, Caracas 1080A, VenezuelaCerdeira, A, IPN, CINVESTAV, SEES, Dept Ingn Elect, Av IPN 2508,Col SP Zacatenco,Apto Postal 14-740, Mexico City 07300, DF, Mexico TI - New method for determination of harmonic distortion in SOIFD transistors AB - We present a new method for calculating the total harmonic distortion (THID) and the third harmonic distortion (HD3) of the output current-voltage characteristics of a semiconductor device. The method is based on the calculation of two functions which we call D and D3 and are based on a specific integration of the DC current-voltage characteristic of the device. In this paper we demonstrate that function D can be correlated with the THD and function D3 with the HD3, so that they can be determined in a much simpler way, with no need to use derivatives, Fourier coefficients or fast Fourier transforms. The new method is applied to calculate the harmonic distortion of a silicon-on-insulator (Sol) fully depleted (FD) MOS transistor in the triode regime to be used as an active resistor at the input of an operational amplifier in a MOSFET-C filter configuration. It is also demonstrated that the transistor I-DS-V-DS characteristics used in these calculations can be obtained from either measurements, analytical models or numerical simulations. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Belgium MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000173367200016 L2 - FILTERS SO - Solid-State Electronics 2002 ;46(1):103-108 5082 UI - 11982 AU - Cerdeirina CA AU - Tovar CA AU - Carballo E AU - Romani L AU - Delgado MD AU - Torres LA AU - Costas M AD - Univ Vigo, Dept Fis Aplicada, Fac Ciencias, E-32004 Vigo, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Lab Termofis, Dept Fis & Quim Teor, Fac Quim, Mexico City 04510, DF, MexicoRomani, L, Univ Vigo, Dept Fis Aplicada, Fac Ciencias, E-32004 Vigo, Spain TI - Temperature dependence of the excess molar heat capacities for alcohol-alkane mixtures. Experimental testing of the predictions from a two-state model AB - A simple association model for alcohol-alkane mixtures, based on the idea that only two energy states are accessible to alcohol molecules in the pure and in the solution states, predicts complex temperature and alcohol concentration dependences of the excess molar heat capacity, C-p.m(E). These predictions are tested through the accurate measurement of pure component and solution heat capacities in the 278.15-338.15 K temperature interval. These measurements were performed at low, equimolar, and high alcohol concentrations for a linear alcohol (1-butanol) and a branched alcohol (3-methyl-3-pentanol) mixed with n-decane and with toluene. The qualitative predictions from the two-state model are corroborated by the data. According to this model, the very different C-p.m(E) behaviors found for the different systems arise simply through the change in hydrogen bonding Gibbs energy occurring on moving from the linear to the branched alcohol and in going from the inert n-decane to the aromatic toluene MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000173256700027 L2 - SELF-ASSOCIATION; INERT SOLVENTS; LINEAR ALCOHOLS; NORMAL-HEPTANE; SYSTEMS; HYDROCARBONS; DENSITIES; WATER SO - Journal of Physical Chemistry B 2002 ;106(1):185-191 5083 UI - 12392 AU - Cerna JR AU - Morales G AU - Eyler GN AU - Canizo AI AD - Ctr Invest Quim Aplicada, Dept Quim Polimeros, Saltillo 25100, Coahuila, MexicoUNCPBA, Dept Ingn, Olavarria, BA, ArgentinaMorales, G, Ctr Invest Quim Aplicada, Dept Quim Polimeros, Blvd Enrique Reyna 140,Apdo Postal 379, Saltillo 25100, Coahuila, Mexico TI - Bulk polymerization of styrene catalyzed by bi- and trifunctional cyclic initiators AB - A study of the bulk free-radical polymerization of styrene in the presence of the cyclic bi- and trifunctional initiators cyclohexanone triperoxide, diethylketone triperoxide, acetone triperoxide, cyclohexanone diperoxide, and pinacolone diperoxide is reported. When these multifunctional initiators are used for styrene polymerization at high temperatures, it is possible to produce polymers with high molecular weights and narrow polydispersities at a high reaction rate. Additionally, the former initiators are used in a mixture that shows that the molecular parameters are influenced by the initiator concentration in the initiation system, in addition to the system employed. (C) 2002 John Wiley & Sons, Inc MH - Argentina MH - Mexico|Coahuila PB - NEW YORK: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 11 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000172104700001 L2 - styrene polymerization;cyclic peroxide initiators;bifunctional or trifunctional initiators;THERMAL-DECOMPOSITION REACTION; FREE-RADICAL POLYMERIZATION; BIFUNCTIONAL INITIATORS; MECHANISM; KINETICS SO - Journal of Applied Polymer Science 2002 ;83(1):1-11 5084 UI - 11286 AU - Cervantes-Martinez CT AU - Frey KJ AU - White PJ AU - Wesenberg DM AU - Holland JB AD - N Carolina State Univ, Dep Crop Sci, USDA ARS, Plant Sci Res Unit, Raleigh, NC 27695, USAUniv Autonoma Chapingo, Mexico City 56230, DF, MexicoIowa State Univ, Dept Agron, Ames, IA 50011, USAIowa State Univ, Dept Food Sci & Human Nutr, Ames, IA 50011, USAUSDA ARS, Natl Small Grains Germplasm Res Facil, Aberdeen, ID 83210, USAHolland, JB, N Carolina State Univ, Dep Crop Sci, USDA ARS, Plant Sci Res Unit, Box 7620, Raleigh, NC 27695 USA TI - Correlated responses to selection for greater beta-glucan content in two oat populations AB - Oat (Avena sativa L.) beta-glucan lowers serum cholesterol in humans. Thus, enhancing its content in oat cultivars for human consumption is desirable. Phenotypic selection for greater beta-glucan content was effective in two broad-based oat populations, BG1 and BG2. The initial and selected cycles of each of these populations were evaluated in 1996 and 1997 at two Iowa locations to determine the correlated responses of agronomic and grain quality traits to selection for greater beta-glucan content. Correlated responses were generally unfavorable for agronomic performance, but favorable in terms of human nutritional value of oat grain. Mean protein content increased by 5% in one population while mean oil content and heading date did not change. Mean grain yield, biomass, and test weight were reduced by 25, 23. and 2%, respectively, in one population and not affected in the other. Plant height decreased by 5% in one population only. Genotypic variances were unchanged by selection, except the genetic variance for plant height in BG2 increased. Selection strengthened negative genotypic correlations between beta-glucan content and grain yield, biomass, and oil content in both populations, and between P-glucan content and test weight, heading date, and height in one population. beta-Glucan yield (the product of beta-glucan content and grain yield) was positively genotypically correlated with both grain yield (r = 0.92 in both populations) and beta-glucan content (r = 0.66 and r = 0.26 in the two populations). Selection for greater beta-glucan yield could be used to improve beta-glucan content and grain yield simultaneously MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000175283900009 L2 - GRAIN-YIELD; PROTEIN YIELD; RECURRENT SELECTION; INHERITANCE; LEVEL SO - Crop Science 2002 ;42(3):730-738 5085 UI - 9693 AU - Cervantes FA AU - Lorenzo C AU - Yates TL AD - Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoColegio Frontera Sur, Dept Ecol & Sistemat Terr, San Cristobal de las Casas 29290, Chiapas, MexicoUniv New Mexico, Museum SW Biol, Albuquerque, NM 87131, USACervantes, FA, Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Genic variation in populations of Mexican lagomorphs AB - Genic variation among representatives of Mexican lagomorphs as revealed by allozymic variation at 31 presumptive loci of Lepus californicus, L. callotis, L. flavigularis, Romerolagus diazi, and Sylvilagus floridanus, was assessed using horizontal gel electrophoresis. Results indicated that the most genically variable species is the widespread L. callotis, whereas the least variable is the endangered L. flavigularis. Genetic distances and phenograms showed that jackrabbits are highly similar to each other and that Romerolagus is genically more similar to Sylvilagus than to Lepus MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000179583200017 L2 - allozymes;genic variation;lagomorphs;Lepus;Mexico;Romerolagus;Sylvilagus;GENETIC-VARIATION; PROTEIN VARIATION; LEPUS-EUROPAEUS; CYTOCHROME-B; SYLVILAGUS; RABBITS; DIFFERENTIATION; SYSTEMATICS; LEPORIDAE; DISTANCE SO - Journal of Mammalogy 2002 ;83(4):1077-1086 5086 UI - 12182 AU - Cervino M AU - Valls-Gabaud D AU - Luridiana V AU - Mas-Hesse JM AD - Observ Midi Pyrenees, CNRS, UMR 5572, F-31400 Toulouse, FranceUPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, FranceMax Planck Inst Extraterr Phys, D-85748 Garching, GermanyNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoEuropean So Observ, D-85748 Garching, GermanyINTA, LAEFF, Madrid 28080, SpainCervino, M, Observ Midi Pyrenees, CNRS, UMR 5572, 14 Ave Edouard Belin, F-31400 Toulouse, France TI - Confidence levels of evolutionary synthesis models - II. On sampling and Poissonian fluctuations AB - In terms of statistical fluctuations, stellar population synthesis models are only asymptotically correct in the limit of a large number of stars, where sampling errors become asymptotically small. When dealing with stellar clusters, starbursts, dwarf galaxies or stellar populations within pixels, sampling errors introduce a large dispersion in the predicted integrated properties of these populations. We present here an approximate but generic statistical formalism which allows a very good estimation of the uncertainties and confidence levels in any integrated property, bypassing extensive Monte Carlo simulations, and including the effects of partial correlations between different observables. Tests of the formalism are presented and compared with proper estimates. We derive the minimum mass of stellar populations which is required to reach a given confidence limit for a given integrated property. As an example of this general formalism, which can be included in any synthesis code, we apply it to the case of young (t less than or equal to 20 Myr) starburst populations. We show that, in general, the UV continuum is more reliable than other continuum bands for the comparison of models with observed data. We also show that clusters where more than 10(5) M. have been transformed into stars have a relative dispersion of about 10% in Q(He+) for ages smaller than 3 Myr. During the WR phase the dispersion increases to about 25% for such massive clusters. We further find that the most reliable observable for the determination of the WR population is the ratio of the luminosity of the WR bump over the H beta luminosity. A fraction of the observed scatter in the integrated properties of clusters and starbursts can be accounted for by sampling fluctuations MH - France MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 35 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000172791100015 L2 - galaxies : starbust;galaxies : evolution;galaxies : statistics;methods : numerical;STELLAR POPULATIONS; STAR-CLUSTERS; MASSIVE STARS; REGIONS; COLORS; GRIDS SO - Astronomy & Astrophysics 2002 ;381(1):51-64 5087 UI - 8068 AU - Cesarman G AU - Rios-Luna N AU - Deora AB AU - arcon-Segovia D AU - Cravioto M AU - Sanchez-Guerrero J AU - Hajjar KA AD - Inst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoCornell Univ, Weill Med Coll, New York, NY, USA TI - Antibodies to annexin II in antiphospholipid syndrome: Prevalence and association with thrombosis MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000179184700200 SO - Blood 2002 ;100(11):55A-56A 5088 UI - 11459 AU - Cespedes CL AU - Uchoa A AU - Salazar JR AU - Perich F AU - Pardo F AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv La Frontera, Dept Ciencias Quim, Temuco, ChileCespedes, CL, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Plant growth inhibitory activity of p-hydroxyacetophenones and tremetones from Chilean endemic Baccharis species and some analogous: A comparative study AB - Plant growth inhibitory effects of acetophenones 1-6, tremetones 7-12, and MeOH and CH2Cl2 extracts from the aerial parts of Baccharis linnearis, Baccharis magellanica, and Baccharis umbelliformis collected in Chile were assayed as growth inhibitory activity in ranges of 10-500 muM and 0.1-150 ppm, respectively. The effects on seedling growth, germination, and respiration of ryegrass, lettuce, green tomato, and red clover weedy target species were measured. In addition to the inhibitory activity on bleaching of crocin induced by alkoxyl radicals, these compounds also demonstrated scavenging properties toward 2,2-diphenyl-1-picrylhydrazyl in thin-layer chromatography autographic and spectrophotometric assays. In addition, acetophenones and tremetones also showed inhibition of H+ uptake and oxygen uptake respiration in isolated chioroplasts and mitochondria, respectively. Our results indicate that 1, 4, 7-12, and CH2Cl2 extracts interfere with the dicot preemergence properties, mainly energy metabolism of the seeds at the level of respiration. These compounds appear to have selective effects on the radicle more than shoot growth of dicot seeds. Also, the levels of radicle, inhibition obtained with some compounds on Physalis ixocarpa and Trifolium pratense are totally comparable to those of ovatifoiin, a known natural growth inhibitor. This behavior might be responsible for its plant growth inhibitory properties and its possible role as an allelopathic agent MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000174844800014 L2 - acetophenones;plant growth inhibitor;Baccharis species;OCCURRING TERPENE DERIVATIVES; SESQUITERPENE LACTONES; SECONDARY METABOLITES; IRIDOID GLUCOSIDES; DEHYDROZALUZANIN-C; CEDRELA-CILIOLATA; NATURAL-PRODUCTS; POTENTIAL USE; ALLELOCHEMICALS; CONSTITUENTS SO - Journal of Agricultural and Food Chemistry 2002 ;50(8):2283-2292 5089 UI - 11605 AU - Chacon-Baca E AU - Beraldi-Campesi H AU - Cevallos-Ferriz SRS AU - Knoll AH AU - Golubic S AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoHarvard Univ, Bot Museum, Cambridge, MA 02138, USABoston Univ, Dept Biol, Boston, MA 02215, USAChacon-Baca, E, Natl Autonomous Univ Mexico, Inst Geol, Circuito Invest Cient, Mexico City 04510, DF, Mexico TI - 70 Ma nonmarine diatoms from northern Mexico AB - Carbonaceous cherts of the Tarahumara Formation, exposed near Huepac, Sonora, Mexico, contain abundant diatom frustules occurring as benthic filamentous colonies. Stratigraphic and paleontological observations indicate that Tarahumara sediments accumulated in a nonmarine setting; radiometric ages on encompassing volcanic rocks delimit their depositional age to ca. 70 Ma. Tarahumara fossils therefore extend the paleontological record of nonmarine diatoms from middle Eocene to Late Cretaceous. Preserved populations include forms similar to species of the extant genera Amphora and Melosira, as well as filament-forming araphid pennates comparable to species of Fragilaria and Tahellaria. Tarahumara fossils indicate that by 70 Ma, nonmarine diatoms had achieved considerable environmental as well as taxonomic diversity MH - Mexico|Distrito Federal MH - USA PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 16 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000174374200022 L2 - Cretaceous;cherts;diatoms;frustules;silica SO - Geology 2002 ;30(3):279-281 5090 UI - 10431 AU - Chacon-Nava JG AU - Stott FH AU - De La Torre SD AU - Martinez-Villafane A AD - Complejo Ind Chihuahua, Div Deterioro Mat, Ctr Invest & Mat Avanzados, Chihuahua 31109, MexicoUniv Manchester, Inst Sci & Technol, Corros & Prot Ctr, Manchester M60 1QD, Lancs, EnglandChacon-Nava, JG, Complejo Ind Chihuahua, Div Deterioro Mat, Ctr Invest & Mat Avanzados, Ave Miguel Cervantes 120, Chihuahua 31109, Mexico TI - Erosion of alumina and silicon carbide at low-impact velocities AB - The erosion performance of two commercial ceramics, alumina (Al2O3) and silicon carbide (SiC), has been studied in a laboratory fluidized-bed (1713) facility in the temperature range from 250 to 560 degreesC. Tests were carried out in air using angular alumina particles with an average size of 100 mum as erodent material at an impact velocity of 5 m/s. The SiC ceramic revealed a better erosion resistance than Al2O3, irrespective of temperature. It is assumed that, at testing temperatures, oxidation plays no transcendental role in the extent of damage. Instead, under present conditions, the high hardness value conferred into the ceramics through higher densifications might lead to a better erosion resistance. At temperatures above 250 degreesC, SEM analysis on the surface of both ceramics disclosed ripple formation, i.e. a plastic deformation process occurring under particle impaction. This was less evident at the lowest testing temperature. Reasons to explain the behavior found are discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000177568600012 L2 - ceramic materials;erosion behavior;low-impact velocity;plastic deformation;ripples;fluidized-bed combustors;BRITTLE MATERIALS; CORROSION; COATINGS SO - Materials Letters 2002 ;55(4):269-273 5091 UI - 9455 AU - Chacon MR AU - Castro-Escarpulli G AU - Soler L AU - Guarro J AU - Figueras MJ AD - Univ Rovira & Virgili, Fac Med & Ciencies Salud, Dept Ciencias Medicas Basicas, Reus 43201, SpainEscuela Natl Ciencias Biol, Dept Bacteriol, Mexico City, DF, MexicoFigueras, MJ, Univ Rovira & Virgili, Fac Med & Ciencies Salud, Dept Ciencias Medicas Basicas, San Lorenzo 21, Reus 43201, Spain TI - A DNA probe specific for Aeromonas colonies AB - Members of the genus Aeromonas are important enteropathogens. Commercial identification systems are often unable to correctly identify Aeromonas strains and misidentification as Vibrio spp. is common. A digoxigenin-DNA probe based on a 237 bp of the glycerophospholipid-cholesterol acyltransferase gene has been tested in a colony hybridization assay. The probe hybridized with all Aeromonas species tested (n = 16) but not with strains of other enteropathogenic bacteria (n = 20). The probe allowed the unequivocal identification of Aeromonas in primary isolation media within 36 h. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0732-8893 UR - ISI:000180211600002 L2 - TARGETED OLIGONUCLEOTIDE PROBES; POLYMERASE-CHAIN-REACTION; CHOLESTEROL ACYLTRANSFERASE; AEROLYSIN GENE; IDENTIFICATION; HYBRIDIZATION; SEQUENCE; SALMONICIDA; HYDROPHILA; MEMBERS SO - Diagnostic Microbiology and Infectious Disease 2002 ;44(3):221-225 5092 UI - 10424 AU - Chamoun N AU - Vucetich H AD - HIAST, Dept Phys, Damascus, SyriaUNAM, Inst Fis, Mexico City, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaChamoun, N, HIAST, Dept Phys, POB 31983, Damascus, Syria TI - Weak interactions effect on the p-n mass splitting and the principle of equivalence AB - The weak interaction contribution to the proton-neutron mass difference is computed using a generalization of Cottingham's formula. When included in the analysis of the Eotvos experiment, this contribution reduces the bound on a possible weak interactions violation to the equivalence principle by one order of magnitude. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - Syria PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177558200012 L2 - DIFFERENCE SO - Physics Letters B 2002 ;541(3-4):291-297 5093 UI - 9875 AU - Charatonik JJ AU - Illanes A AU - Macias S AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUNAM, Inst Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Induced mappings on the hyperspaces C-n(X) of a continuum X AB - For a given mapping between continua we study the induced mappings between the corresponding hyperspaces of nonempty closed subsets with at most n components, and deduce some fixed point theorems. Our results extend various results that are known for the induced mappings between the hyperspaces of subcontinua MH - Mexico|Distrito Federal MH - Poland PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000179105700009 L2 - absolute retract;atomic;CE-mapping;confluent;continuum;contractible;epsilon-mapping;fixed point property;hereditarily;homeomorphism;hyperspace;induced mapping;monotone;open;order arc;quasi-monotone;r-mapping;refinable;semi-confluent;universal;weakly confluent;PROPERTY; OPENNESS SO - Houston Journal of Mathematics 2002 ;28(4):781-805 5094 UI - 10923 AU - Charatonik JJ AU - Charatonik WJ AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Missouri, Dept Math & Stat, Rolla, MO 65409, USACharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - A counterexample concerning Whitney reversible properties AB - Two properties of continua are shown which are strong Whitney reversible while not sequential strong Whitney reversible. This answers an old question of S. B. Nadler, Jr MH - Mexico|Distrito Federal MH - Poland MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000176101500035 L2 - continuum;hyperspace;Whitney map;Whitney property SO - Proceedings of the American Mathematical Society 2002 ;130(10):3097-3099 5095 UI - 11544 AU - Charatonik JJ AU - Covarrubias PP AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - On covering mappings on solenoids AB - Covering mappings on the dyadic solenoid are studied. Some results stated by Zhou Youcheng (2000) are discussed in a more detailed way by indicating certain inaccuracies in their proofs. These are either corrected or supplemented, or else suitable counterexamples are constructed. Some open questions are asked and connections with related results are considered MH - Mexico|Distrito Federal MH - Poland PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000174624600036 L2 - continuum;covering mapping;homotopic;inverse limit;solenoid SO - Proceedings of the American Mathematical Society 2002 ;130(7):2145-2154 5096 UI - 11806 AU - Charatonik JJ AU - Charatonik WJ AU - Prajs JR AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Opole, Inst Math, PL-45651 Opole, PolandCharatonik, JJ, UNAM, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Gate continua, absolute terminal continua and absolute retracts AB - The following classes K of continua are studied in the paper: (hereditarily decomposable) arc-like, hereditarily irreducible, atriodic, and containing no n-od. If X, Y, Z, K is an element of K, with X boolean OR Y = Z, X boolean AND Y = K and X not equal Z not equal Y, then K is called a gate continuum in X for K. We characterize gate subcontinua in members of the above classes K. The characterizations are used to construct absolute terminal continua for K, i.e., continua X in K that are terminal in Y is an element of K whenever X subset of Y. These results are applied to investigating properties of absolute retracts for K MH - Mexico|Distrito Federal MH - Poland PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000173864400006 L2 - absolute retract;arc component;arc-like;atriodic;continuum;decomposable;gate;hereditarily unicoherent;n-od;retraction;tree-like SO - Houston Journal of Mathematics 2002 ;28(1):89-117 5097 UI - 9790 AU - Charlier JC AU - Terrones M AU - Baxendale M AU - Meunier V AU - Zacharia T AU - Rupesinghe NL AU - Hsu WK AU - Grobert N AU - Terrones H AU - Amaratunga GAJ AD - Univ Sussex, Sussex Nanosci & Nanotechnol Ctr, Brighton BN1 9QJ, E Sussex, EnglandUniv Catholique Louvain, PCPM, B-1348 Louvain, BelgiumUniv Catholique Louvain, CERMIN, B-1348 Louvain, BelgiumIPICyT, Adv Mat Dept, San Luis Potosi 78210, MexicoUniv London Queen Mary Coll, Dept Phys, London E1 4NS, EnglandUniv Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandOak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831, USAOak Ridge Natl Lab, Comp & Computat Sci Directorate, Oak Ridge, TN 37831, USAMax Planck Inst Met Res, D-70569 Stuttgart, GermanyTerrones, M, Univ Sussex, Sussex Nanosci & Nanotechnol Ctr, Brighton BN1 9QJ, E Sussex, England TI - Enhanced electron field emission in B-doped carbon nanotubes AB - Field emission properties of B-doped carbon nanotubes are investigated from both theoretical and experimental standpoints. Using tight-binding and ab initio calculations, it is observed that B-saturating tip edges of carbon nanotubes induce the presence of large peaks within the local density of states (LDOS) located in an energy region close to the Fermi level (Ef). These localized states suggest a field emission enhancement for the B-doped tubes. In addition, ab initio theoretical results indicate that the work function for B-doped tubes is 1.7 eV lower when compared to pure carbon-terminated nanotubes. Experimentally, it is found that B-doped tubes, which are produced by arc discharge techniques and contain B mainly at the tips, exhibit stable electron field emission at lower turn-on voltages (1.4 V/mum) when compared to pure single- and multiwalled carbon nanotubes (2.8 and 3.0 V/mum, respectively) measured under the same conditions. We strongly believe our results will bring new insights in the fabrication of stable field emission sources MH - Belgium MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 37 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000179301800003 L2 - GAS SO - Nano Letters 2002 ;2(11):1191-1195 5098 UI - 11748 AU - Charrin L AU - Becquart-Gallissian A AU - Combe A AU - Gonzalez G AU - Charai A AD - Fac Sci & Tech St Jerome, CNRS, UMR 6122, Lab TECSEN, F-13397 Marseille 20, FranceFac Sci & Tech St Jerome, CNRS, UMR 6137, Lab L2MP, F-13397 Marseille, FranceUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCharrin, L, Fac Sci & Tech St Jerome, CNRS, UMR 6122, Lab TECSEN, Case 511, F-13397 Marseille 20, France TI - Key experimental parameters for internal-band formation: Relationship between stress and oxidation kinetics in silver-magnesium alloys AB - Microstructural features of dilute (1.3 to 5 at.%) Ag-Mg internally oxidized alloys were studied at temperatures from 400 to 750degreesC The experimental conditions needed for oxide-band formation were determined. A model is proposed based on kinetics and stress-relaxation considerations that explains band formation from the first stages. The kinetics are driven by oxygen diffusion and the formation of hyperstoichiometric MgO clusters leading to a dilatation of the crystal. If the Mg content is high enough (>3 at.%), the stress state induced by the clusters form a diffusion barrier that is responsible for the formation of internal oxide bands MH - France MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0030-770X UR - ISI:000173933600005 L2 - silver alloys;internal oxidation;oxide bands;magnesium oxide;oxidation kinetics;internal stress;AG-MG ALLOYS; MATRIX SO - Oxidation of Metals 2002 ;57(1-2):81-98 5099 UI - 8787 AU - Chaudhury MF AU - Alvarez LA AU - Velazquez LL AD - USDA ARS, Screwworm Res Unit, Tuxtla Gutierrez, Chiapas, MexicoChaudhury, MF, USDA ARS, Midw Livestock Insects Res Unit, 305 PI Bldg,UN L E Campus, Lincoln, NE 68583 USA TI - Recycled paper products as substitutes for gelling agent in screwworm (Diptera : Calliphoridae) larval diet AB - Absorbent recycled paper products were tested and compared with a sodium polyacrylate gelling agent, Aquatain, for solidifying larval diets of the screwworm, Cochliomyia hominivorax (Coquerel). A recycled newsprint product, Terra-Mulch. when mixed,with water and dietary ingredients produced a diet medium of homogeneous texture that supported lard a growth and development comparable to the standard diet prepared with the gelling agent. Biological yields as calculated from number of pupae per tray from both the diets were similar. Three other types of recycled paper products were tested. Although less homogeneous in texture, these diets were as good as the diet with Terra-Mulch. There were no significant differences in the mean larval and pupal weights, no. of pupae/tray, percent emergence, oviposition, percent hatch, and percent longevity. When tests were conducted through eight consecutive generations, no adverse effect was noticed in any of the life history parameters. Terra-Mulch is inexpensive and biodegradable compared with the gelling agent Aquatain that is expensive and not biodegradable. Replacing Aquatain with Terra-Mulch in the screwworm larval diet for mass rearing may result in an annual savings of more than half a million U.S. dollars in costs of material and labor MH - Mexico|Chiapas MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000182067200033 L2 - screwworm;larval diet;mass;rearing;recycled paper;GELLED MEDIA SO - Journal of Economic Entomology 2002 ;95(6):1337-1341 5100 UI - 11161 AU - Chavez-Cerda S AU - Padgett MJ AU - Allison I AU - New GHC AU - Gutierrez-Vega JC AU - O'Neil AT AU - MacVicar I AU - Courtial J AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv London Imperial Coll Sci Technol & Med, Quantum Opt & Laser Sci Grp, London SW7 2BW, EnglandUniv Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, ScotlandChavez-Cerda, S, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51-216, Puebla 72000, Mexico TI - Holographic generation and orbital angular momentum of high-order Mathieu beams AB - We report the first experimental generation of high-order Mathieu beams and confirm their propagation invariance over a limited range. In our experiment we use a computer-generated phase hologram. The peculiar behaviour of the vortices in Mathieu beams gives rise to questions about their orbital-angular-momentum content, which we calculate by performing a decomposition in terms of Bessel beams MH - United Kingdom MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 20 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000175436100022 L2 - computer-generated holograms;orbital angular momentum of light;diffraction-free beams;NONDIFFRACTING BEAMS; VORTICES; FIELDS SO - Journal of Optics B-Quantum and Semiclassical Optics 2002 ;4(2):S52-S57 5101 UI - 10456 AU - Chavez-Garcia FJ AU - Castillo J AU - Stephenson WR AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoInst Geol & Nucl Sci Ltd, Lower Hutt, New ZealandChavez-Garcia, FJ, Univ Nacl Autonoma Mexico, Inst Ingn, Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - 3D site effects: A thorough analysis of a high-quality datasset AB - This article is a contribution toward filling the large gap that currently exists between theoretical and observational studies of site effects. We present a detailed analysis of 10 events recorded by a dense temporary seismograph network that operated in the small (roughly 1.3 by 0.4 km) alluvial valley of Parkway, New Zealand. We computed f-k spectra for the three recorded components of those 10 events as a function of frequency and time window along the seismograms. Our results show that a major part of the energy in the records propagates as surface waves. The small size of the basin explains the observation that small phase velocity waves appear shortly after direct P- and S-wave arrivals. Both Love and Rayleigh waves are present. It was difficult to isolate individual wavetrains, but directions of propagation are dominated by southerly directions, especially at lower frequencies and earlier times along the seismograms. The inversion of observed phase velocity dispersion is in very good agreement with available information on the subsoil structure for this valley. A comparison with a different interpretation of one event from our dataset shows clearly how misleading it can be to analyze partial observations. The large variability of ground motion in the time domain contrasts with the very stable results obtained for this dataset in the frequency domain and indicates that we still have a long way to go before we are able to incorporate locally generated surface waves into the frame of modern building codes MH - Mexico|Distrito Federal MH - New Zealand PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000177485400021 L2 - SEDIMENT-FILLED VALLEYS; SEISMIC RESPONSE; FINITE-DIFFERENCES; WAVE PROPAGATION; EARTHQUAKE; SIMULATION; MOTION; SYSTEM SO - Bulletin of the Seismological Society of America 2002 ;92(5):1941-1951 5102 UI - 9085 AU - Chavez E AU - Navarro G AD - Univ Michoacana, Escuela Ciencias Fis Matemat, Morelia 58000, Michoacan, MexicoUniv Chile, Depto Ciencias Comp, Santiago 2120, ChileChavez, E, Univ Michoacana, Escuela Ciencias Fis Matemat, Ciudad Univ, Morelia 58000, Michoacan, Mexico TI - A metric index for approximate string matching AB - We present a radically new indexing approach for approximate string matching. The scheme uses the metric properties of the edit distance and can be applied to any other metric between strings. We build a metric space where the sites are the nodes of the suffix tree of the text, and the approximate query is seen as a proximity query on that metric space. This permits us finding the R occurrences of a pattern of length m in a text of length n in average time O(m log(2) n +m(2) + R), using O(n log n) space and O(n log(2) n) index construction time. This complexity improves by far over all other previous methods. We also show a simpler scheme needing O(n) space MH - Chile MH - Mexico|Michoacan PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000181140400017 L2 - SUFFIX TREES; CONSTRUCTION; ALGORITHM SO - Latin 2002: Theoretical Informatics 2002 ;2286():181-195 5103 UI - 10070 AU - Chavushyan V AU - Mujica R AU - Valdes JR AU - Gorshkov AG AU - Konnikova VK AU - Mingaliev MG AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357169, Karachaevo Cher, RussiaChavushyan, V, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Classification of optical identifications of radio sources from complete samples AB - Classifications of the optical counterparts and radio spectra of nine radio sources are presented. The observations were carried out using the 2.1-m optical telescope in Cananea (Mexico) at 4200-9000 Angstrom and the RATAN-600 radio telescope at 0.97-21.7 GHz. Five objects have been classified as quasars (three have redshifts z > 2), two as BL Lac objects, one as an elliptical galaxy, and one as an absorption-line galaxy. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000178533400001 L2 - SPECTRA; OBJECTS SO - Astronomy Reports 2002 ;46(9):697-703 5104 UI - 11002 AU - Chen CB AU - Marcus A AU - Li WX AU - Hu Y AU - Calzada JPV AU - Grossniklaus U AU - Cyr RJ AU - Ma H AD - Penn State Univ, Dept Biol, University Pk, PA 16802, USAPenn State Univ, Life Sci Consortium, University Pk, PA 16802, USAPenn State Univ, Intercoll Grad Program Plant Physiol, University Pk, PA 16802, USACold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USACINVESTAV, Plant Biotechnol Unit, Irapuato, Gto, MexicoUniv Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandMa, H, Penn State Univ, Dept Biol, University Pk, PA 16802, USA TI - The Arabidopsis ATK1 gene is required for spindle morphogenesis in male meiosis AB - The spindle plays a central role in chromosome segregation during mitosis and meiosis. In particular, various kinesins are thought to play crucial roles in spindle structure and function in both mitosis and meiosis of fungi and animals. A group of putative kinesins has been previously identified in Arabidopsis, called ATK1-ATK4 (previously known as KATA-KATD), but their in vivo functions have not been tested with genetic studies. We report here the isolation and characterization of a mutant, atk1-1, which has a defective ATK1 gene. The atk1-1 mutant was identified in a collection of Ds transposon insertion lines by its reduced fertility. Reciprocal crosses between the atk1-1 mutant and wild type showed that only male fertility was reduced, not female fertility. Molecular analyses, including revertant studies, indicated that the Ds insertion in the ATK1 gene was responsible for the fertility defect. Light microscopy revealed that, in the atk1-1 mutant, male meiosis was defective, producing an abnormal number of microspores of variable sizes. Further cytological studies indicated that meiotic chromosome segregation and spindle organization were both abnormal in the mutant. Specifically, the atk1-1 mutant male meiotic cells had spindles that were broad, unfocused and multi-axial at the poles at metaphase I, unlike the typical fusiform bipolar spindle found in the wild-type metaphase I cells. Therefore, the ATK1 gene plays a crucial role in spindle morphogenesis in male Arabidopsis meiosis MH - Mexico|Guanajuato MH - Switzerland MH - USA PB - CAMBRIDGE: COMPANY OF BIOLOGISTS LTD RP - NOT IN FILE U3 - TC 34 U4 - Developmental Biology U5 - J;Article AV - English IS - 0950-1991 UR - ISI:000176063600008 L2 - Arabidopsis thaliana;kinesin;meiosis;spindle;transposon;KINESIN-LIKE PROTEIN; MICROTUBULE MOTOR PROTEINS; NCD TAIL DOMAIN; MITOTIC SPINDLE; SACCHAROMYCES-CEREVISIAE; IDENTIFICATION; THALIANA; MOTILITY; MITOSIS; PLANTS SO - Development 2002 ;129(10):2401-2409 5105 UI - 9732 AU - Cheng WH AU - Endo A AU - Zhou L AU - Penney J AU - Chen HC AU - Arroyo A AU - Leon P AU - Nambara E AU - Asami T AU - Seo M AU - Koshiba T AU - Sheen J AD - Harvard Univ, Sch Med, Dept Genet, Boston, MA 02114, USAMassachusetts Gen Hosp, Dept Mol Biol, Boston, MA 02114, USAAcad Sinica, Inst Bot, Taipei 11529, TaiwanTokyo Metropolitan Univ, Dept Biol Sci, Hachioji, Tokyo 1920397, JapanUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoRIKEN, Inst Phys & Chem Res, Plant Sci Ctr, Wako, Saitama 3510198, JapanRIKEN, Inst Phys & Chem Res, Plant Funct Lab, Wako, Saitama 3510198, JapanSheen, J, Harvard Univ, Sch Med, Dept Genet, Boston, MA 02114, USA TI - A unique short-chain dehydrogenase/reductase in Arabidopsis glucose signaling and abscisic acid biosynthesis and functions AB - Glc has hormone-like functions and controls many vital processes through mostly unknown mechanisms in plants. We report here on the molecular cloning of GLUCOSE INSENSITIVE1 (GIN1) and ABSCISIC ACID DEFICIENT2 (ABA2) which encodes a unique Arabidopsis short-chain dehydrogenase/reductase (SDR1) that functions as a molecular link between nutrient signaling and plant hormone biosynthesis. SDR1 is related to SDR superfamily members involved in retinoid and steroid hormone biosynthesis in mammals and sex determination in maize. Glc antagonizes ethylene signaling by activating ABA2/GIN1 and other abscisic acid (ABA) biosynthesis and signaling genes, which requires Glc and ABA synergistically. Analyses of aba2/gin1 null mutants define dual functions of endogenous ABA in inhibiting the post-germination developmental switch modulated by distinct Glc and osmotic signals and in promoting organ and body size and fertility in the absence of severe stress. SDR1 is sufficient for the multistep conversion of plastid- and carotenoid-derived xanthoxin to abscisic aldehyde in the cytosol. The surprisingly restricted spatial and temporal expression of SDR1 suggests the dynamic mobilization of ABA precursors and/or ABA MH - Japan MH - Mexico|Morelos MH - Taiwan MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 121 U4 - Biochemistry & Molecular Biology;Plant Sciences;Cell Biology U5 - J;Article AV - English IS - 1040-4651 UR - ISI:000179264700007 L2 - GENE-EXPRESSION; 9-CIS-EPOXYCAROTENOID DIOXYGENASE; ALDEHYDE OXIDASE; ZEAXANTHIN EPOXIDASE; DEVELOPMENTAL ARREST; INSENSITIVE MUTANTS; HIGHER-PLANTS; WATER-STRESS; SDR ENZYMES; ETHYLENE SO - Plant Cell 2002 ;14(11):2723-2743 5106 UI - 9899 AU - Chernov V AU - Piters TM AU - Mironenko S AD - Univ Sonora, Ctr Invest Fis, Sonora 83000, MexicoIrkutsk Interreg Ctr Radiat Safety, Irkutsk 664020, RussiaChernov, V, Univ Sonora, Ctr Invest Fis, AP 5-088, Sonora 83000, Mexico TI - Temperature variation of the shape of the F band in undoped LiF AB - The optical absorption (OA) spectra between 3.1 and 6.2 eV of undoped X ray irradiated LiF measured during and after linear heating up to increasing end temperatures have been studied. The temperature variation of the OA near 5 eV, which is usually attributed to F centres has been analysed by direct comparison between different OA spectra and by deconvolution of the OA spectra. It was found that the OA consists of three overlapping bands belonging to three different centres. The bands, which are Gaussian with maxima at 4.4, 4.78 and 5.08 eV (at 300 K), have different behaviour under thermal treatment. The most stable band is the 5.08 eV band, which corresponds to the pure F centres. The 4.78 eV band disappears completely after heating up to 600 K and was supposed to be connected with F, centres. The 4.4 eV band (absent after irradiation) starts to increase and decrease after passing a maximum with temperature increasing. The 4.78 and 5.08 eV bands show strong linear temperature dependencies of the maximum position and the width MH - Mexico|Sonora MH - Russia PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899600036 L2 - OPTICAL-ABSORPTION; LIF-MG,TI; THERMOLUMINESCENCE SO - Radiation Protection Dosimetry 2002 ;100(1-4):175-178 5107 UI - 11779 AU - Cherpitel CJ AU - Borges G AD - Inst Publ Hlth, Alchohol Res Grp, Berkeley, CA, USAUAM Xochimilco, Mexico City, DF, MexicoNatl Inst Psychiat, Mexico City, DF, MexicoCherpitel, CJ, Inst Publ Hlth, Alchohol Res Grp, 20001 Ave, Berkeley, CA USA TI - Drinking in the injury event: A comparison of Mexican-American male ER patients in the United States and in Mexico AB - Probability samples of 66 Mexican-American injured male emergency room (ER) patients in Santa Clara County, CA, and 457 injured male ER patients in Pachuca, Mexico are compared on a number of drinking-in-the-event variables. While those in Pachuca were more likely to be positive on the breathalyzer than those in Santa Clara, they were less likely to attribute a causal association of their drinking with the event. Site (Santa Clara) was found to be a significant (positive) predictor of drinking prior to injury MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Substance Abuse;Psychiatry;Psychology U5 - J;Article AV - English IS - 1082-6084 UR - ISI:000173751800007 L2 - (ER) patients;drinking-in-the-event;Mexican Americans;Mexico;emergency room;EMERGENCY ROOM POPULATIONS; ALCOHOL-CONSUMPTION; SPAIN SO - Substance Use & Misuse 2002 ;37(1):133-143 5108 UI - 11522 AU - Chesley J AU - Ruiz J AU - Righter K AU - Ferrari L AU - Gomez-Tuena A AD - Univ Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Arizona, Lunar & Planetary Lab, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Geol, Unidad Ciencias Tierra, Queretaro 76001, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoChesley, J, Univ Arizona, Dept Geosci, Tucson, AZ 85721, USA TI - Source contamination versus assimilation: an example from the Trans-Mexican Volcanic Arc AB - Volcanic samples representing a wide range of lithologies and compositions were collected from the Miocene to Quaternary age Michoacan-Guanajuato volcanic field (MGVF) in the Trans-Mexican volcanic belt (TMVB). The samples were analyzed for major and trace elements, and Sr-87/Sr-86 and Os-187/Os-188 in an effort differentiate the importance of source contamination and assimilation in continental arc magmatism. Re concentrations in the MGVF samples range from 0.03 to 0.13 ppb and Os concentrations range from 0.05 to 0.001 ppb. The Sr-87/Sr-86 of the samples vary little, ranging from 0.7037 to 0.7047, despite a wide range in major element composition. However, the Os-187/Os-188 vary greatly, from 0.135 to 0.410. Decreasing Os concentration and increasing Os-187/Os-188 show a clear relation with indicators of fractionation such as MgO or Ni. A plot Of Os-187/Os-188 versus Ba/Nb for all samples from the MGVF show two distinct trends: (1) a wide variation in Ba/Nb (50-200) associated with minor variations in Os-187/Os-188 (similar to 0.135-0.145), and (2) increasing Os-187/Os-188 (0.145-0.40) associated with restricted Ba/Nb (35-70). These trends are best explained through a dynamic multi-component process. Fluids are released from the subducting slab, resulting in melting of the overlying asthenospheric wedge. The pristine fluids have high Ba and low Re and Os concentrations. The resulting melts have variable Ba/Nb, but unradiogenic Os-187/Os-188. Superimposed upon these melts are both assimilation and fractional crystallization processes, which affect both the Ba/Nb and Os-187/Os-188 systems as they ascend into the lower crust. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0012-821X UR - ISI:000174746000004 L2 - Re/Os;subduction;island arcs;volcanism;metasomatism;assimilation;OS ISOTOPIC SYSTEMATICS; RE-OS; SUBDUCTION ZONES; LITHOSPHERIC MANTLE; OCEANIC-CRUST; OSMIUM; MAGMAS; CONSTRAINTS; TEMPERATURE; XENOLITHS SO - Earth and Planetary Science Letters 2002 ;195(3-4):211-221 5109 UI - 10585 AU - Cheteri MK AU - Goodman KJ AU - McPherson RS AU - O'Rourke K AU - Redlinger T AU - Campos A AU - de la Rosa M AD - Univ Texas, Sch Publ Hlth, Houston, TX 77225, USAUniv Texas, El Paso, TX 79968, USAMexican Social Secur Inst, Ciudad Juarez, MexicoTexas Tech Univ, El Paso, TX, USA TI - Which socioeconomic indicators influence the incidence rate of Helicobacter pylori infection in infants from a US-Mexico border population? MH - Mexico|Chihuahua MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600507 SO - Epidemiology 2002 ;13(4):S176-S177 5110 UI - 7130 AU - Chibret H AU - Goldschmidt P AU - Garcia LE AU - Vargas LD AU - Montoya CM AU - Zago VV AD - Labs Thea, Clermont Ferrand, FranceAPEC, Coyoacan, MexicoCtr Medico Nacl Siglo XXI IMSS, Mexico City, DF, MexicoCMN La Raza IMSS, Mexico City, DF, Mexico TI - Detection of chlamydiae (Chl) in children presenting follicles (foll) in the inferior conjunctiva in Chiapas-Mexico MH - France MH - Mexico|Distrito Federal PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606602167 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U507-U507 5111 UI - 10857 AU - Chimal-Monroy J AU - Montero JA AU - Ganan Y AU - Macias D AU - Garcia-Porrero JA AU - Hurle JM AD - Univ Cantabria, Fac Med, Dept Anat & Biol Celular, Santander 39011, SpainUNAM, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City, DF, MexicoUniv Extremadura, Dept Ciencias Morfol & Biol Celular & Anim, Badajoz, SpainHurle, JM, Univ Cantabria, Fac Med, Dept Anat & Biol Celular, C Cardenal Herrera Oria S-N, Santander 39011, Spain TI - Comparative analysis of the expression and regulation of Wnt5a, Fz4, and Frzb1 during digit formation and in micromass cultures AB - Previous studies have shown that three members of the Wnt signaling pathway, the ligand WNT5A, the receptor FZ4, and the Wnt antagonist FRZB1, are implicated in the formation and differentiation of the digits. In this study, we have attempted to establish a functional correlation between them by comparing their expression patterns and their regulation by the signals controlling proliferation and differentiation of the limb mesoderm during formation of the avian digits in vivo and in micromass cultures. In vivo Wnt5a and Fz4 are expressed in the undifferentiated mesoderm of the autopod and in the differentiating digit cartilages. In the undifferentiated mesoderm, the expression of both genes is regulated positively by FGFs and negatively by bone morphogenetic proteins (BMPs). As chondrogenic differentiation starts, Fz4 becomes intensely up-regulated in the aggregate and in the developing perichondrium, whereas transcripts of Wnt5a are excluded from the core of the aggregate but maintained in the surrounding mesenchyme and perichondrium. In addition, at this stage, the expression of both genes become positively regulated by BMPs. These changes in expression and regulation are coincident with the induction of Frzb1 in the chondrogenic aggregate, which is expressed under the positive control of BMPs. Our findings fit with a role of Wnt5a/Fz4 negatively regulating in vivo the initiation and progression of cartilage differentiation. In vitro, only Frzb1 is expressed and regulated in a manner resembling that observed in vivo. Wnt5a and Fz4 are both expressed in the differentiating mesenchyme of micromass cultures, but their expression is not significantly regulated by the addition of FGF-2 or BMP-7 to the culture medium. (C) 2002 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 10 U4 - Anatomy & Morphology;Developmental Biology U5 - J;Article AV - English IS - 1058-8388 UR - ISI:000176576700006 L2 - chondrogenesis;limb development;BMP-signaling;FGFs;CHICK LIMB BUD; PROGRAMMED CELL-DEATH; TGF-BETA-S; PATTERN-FORMATION; IN-VITRO; ROLES; CHONDROGENESIS; BMP-2; DIFFERENTIATION; PROXIMODISTAL SO - Developmental Dynamics 2002 ;224(3):314-320 5112 UI - 10476 AU - Chinchure AD AU - Sandoval EM AU - Mydosh JA AD - Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, NetherlandsInst Postino Invest Cient & Tecnol, San Luis Potosi 78231, MexicoMax Planck Inst Chem Phys Solids, D-01187 Dresden, GermanyChinchure, AD, Leiden Univ, Kamerlingh Onnes Lab, POB 9504, NL-2300 RA Leiden, Netherlands TI - Metamagnetism and giant magnetoresistance of the rare-earth intermetallic compounds R2Ni2Pb (R=Er,Ho,Dy) AB - We have measured the magnetization and magnetoresistance for a series of rare-earth (R=Er,Ho,Dy) plumbide intermetallic compounds, R2Ni2Pb. These materials form in an unusual orthorhombic structure with space group Cmmm. After multiple magnetic transitions, the ground state exhibits a steplike series of large-moment metamagnetic transitions in low fields (1-2 T) concomitant with switchinglike properties of the magnetoresistance where sharp changes of up to 30% are found. We relate these properties to the layered magnetic structure of the compound MH - Germany MH - Mexico|San Luis Potosi MH - Netherlands PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000177338400014 L2 - MAGNETIC MULTILAYERS; UNIGA; TRANSITIONS SO - Physical Review B 2002 ;66(2): 5113 UI - 10298 AU - Cho I AD - Univ Paris 11, LPT, F-91405 Orsay, FranceUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCho, I, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - O(4) texture with a cosmological constant AB - We investigate O(4) textures in a background with a positive cosmological constant. We find static solutions which comove with the expanding background. There exists a solution in which the scalar field is regular at the horizon. This solution has a noninteger winding number smaller than 1. There also exist solutions in which scalar-field derivatives are singular at the horizon. Such solutions can complete one winding within the horizon. If the winding number is larger than some critical value, static solutions including the regular one are unstable under perturbations MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177912000090 L2 - SIMILAR GLOBAL TEXTURE; COSMIC STRINGS; INSTABILITY; COLLAPSE; GRAVITY; ORIGIN; FIELD SO - Physical Review D 2002 ;66(4): 5114 UI - 9116 AU - Choa TO AU - Riosmena-Rodriguez R AU - Boo SM AD - Chungnam Natl Univ, Dept Biol, Taejon 305764, South KoreaUABCS, Dept Marine Biol, Programa Invest Bot Marina, La Paz 23080, Baja Calif Sur, MexicoBoo, SM, Chungnam Natl Univ, Dept Biol, Taejon 305764, South Korea TI - Developmental morphology of a poorly documented alga, Ceramium recticorticum (Ceramiaceae, Rhodophyta), from the Gulf of California, Mexico AB - We studied the vegetative, reproductive, and developmental morphology of Ceramium recticorticum Dawson. Thalli are alternately branched and have four peraxial cells with four to five pseudoperiaxial cells. Acropetal and basipetal cortical cells are produced by transverse division of periaxial and pseudoperiaxial cells and are rectangular, horizontally elongated, and regularly arranged in four to five columns and rows. Spermatangia are produced on the adaxial side of the upper branches and later in whorls. Cystocarps are spherical and surrounded by 2-4 involucral branches. Tetrasporangia are produced in an opposite sequence, completely covered by cortical cells, and arranged in whorls. The development of spermatangia and cystocarps are described for the first time and conform to the description of the genus. Ceramium recticorticum is similar to C. fimbriatum Setchell et Gardner, C. flaccidum (Kutzing) Ardissone, and C. gracillimum (Mitzing) Griffiths et Harvey ex Harvey var. byssoideum (Harvey) Mazoyer in sharing a horizontally elongated basipetal cortical cell by transverse division of periaxial cells and rhizoids composed of unicellular filaments with pads produced from periaxial cells. These taxa may be considered as a group of closely related species MH - Mexico|Baja California Sur MH - South Korea PB - PARIS: ADAC-CRYPTOGAMIE RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0181-1568 UR - ISI:000181130000001 L2 - Ceramiaceae;Ceramium recticorticum;marine red algae;morphology;taxonomy;COAST SO - Cryptogamie Algologie 2002 ;23(4):277-289 5115 UI - 8621 AU - Choudhury A AU - Perez-Ponce de Leon G AD - St Norbert Coll, De Pere, WI 54115, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - Parascript studies and the historical biogeography of North American freshwater fishes MH - Mexico|Distrito Federal MH - USA PB - MCLEAN: SOC INTEGRATIVE COMPARATIVE BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Meeting Abstract AV - English IS - 1540-7063 UR - ISI:000182356600137 SO - Integrative and Comparative Biology 2002 ;42(6):1208-1208 5116 UI - 11373 AU - Chow JC AU - Watson JG AU - Edgerton SA AU - Vega E AD - Desert Res Inst, Reno, NV 89512, USABattelle Pacific NW Natl Lab, Washington, DC, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoChow, JC, Desert Res Inst, 2215 Raggio Pkwy, Reno, NV 89512, USA TI - Chemical composition of PM2.5 and PM10 in Mexico City during winter 1997 AB - PM2.5 and PM10 were measured over 24-h intervals at six core sites and at 25 satellite sites in and around Mexico City from 23 February to 22 March 1997. In addition, four 6-h samples were taken each day at three of the core sites. Sampling locations were selected to represent regional, central city, commercial, residential, and industrial portions of the city. Mass and light transmission concentrations were determined on all of the samples, while elements, ions and carbon were measured on approximately two-thirds of the samples. PM10 concentrations were highly variable, with almost three-fold differences between the highest and lowest concentrations. Fugitive dust was the major cause of PM10 differences, although carbon concentrations were also highly variable among the sampling sites. Approximately 50% of PM10 was in the PM2.5 fraction. The majority of PM mass was comprised of carbon, sulfate, nitrate, ammonium and crustal components, but in different proportions on different days and at different sites. The largest fine-particle components were carbonaceous aerosols, constituting similar to 50% Of PM2.5 mass, followed by similar to 30% secondary inorganic aerosols and similar to 15% geological material. Geological material is the largest component of PM10, constituting similar to 50% of PM10 mass, followed by similar to 32% carbonaceous aerosols and similar to 17% secondary inorganic aerosols. Sulfate concentrations were twice as high as nitrate concentrations. Sulfate and nitrate were present as ammonium sulfate and ammonium nitrate. Approximately two-thirds of the ammonium sulfate measured in urban areas appears to have been transported from regions outside of the study domain, rather than formed from emissions in the urban area. Diurnal variations are apparent, with two-fold increases in concentration from night-time to daytime. Morning samples had the highest PM2.5 and PM10 mass, secondary inorganic aerosols and carbon concentrations, probably due to a shallow surface inversion and rush-hour traffic. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000175007600003 L2 - PM2.5;PM10;Mexico City;satellite sites;CALIFORNIA AIR-QUALITY; LOS-ANGELES; DESCRIPTIVE ANALYSIS; SUSPENDED PARTICLES; RESPIRATORY HEALTH; AMMONIUM-NITRATE; CARBON; POLLUTION; AEROSOL; PM(10) SO - Science of the Total Environment 2002 ;287(3):177-201 5117 UI - 11393 AU - Chow JC AU - Watson JG AU - Edgerton SA AU - Vega E AU - Ortiz E AD - Univ & Community Coll Syst Nevada, Desert Res Inst, Reno, NV 89512, USANatl Sci Fdn, Atmospher Chem Program, Arlington, VA 22230, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoChow, JC, Univ & Community Coll Syst Nevada, Desert Res Inst, 2215 Raggio Pkwy, Reno, NV 89512 USA TI - Spatial differences in outdoor PM10 mass and aerosol composition in Mexico City AB - Twenty-five MiniVol samplers were operated throughout the Mexico City metropolitan region from February 22 through March 22, 1997, to evaluate the variability of PM10 concentrations and composition. The highest PM10 concentrations were found in neighborhoods with unpaved or dirty roads, and elements related to crustal material were the main cause of differences from nearby (<200 m) monitors that were not adjacent to the roadbed. SO42- concentrations were homogeneous across the city. SO42- measured at the city boundaries was about two-thirds of the concentrations measured within the urbanized area, indicating that most SO42- is of regional origin. Elemental carbon (EC) and organic carbon (OC) concentrations were highly variable, with higher concentrations in areas that had high diesel traffic and older vehicles. Spatial correlations among PM10 concentrations were high, even though absolute concentrations were variable, indicating a common effect of meteorology on the concentration or dispersion of local emissions MH - Mexico|Distrito Federal MH - USA PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000175002300007 L2 - AIR-QUALITY; PROJECT SO - Journal of the Air & Waste Management Association 2002 ;52(4):423-434 5118 UI - 12037 AU - Christen P AU - Domenech F AU - Michelena G AU - Auria R AU - Revah S AD - Univ Aix Marseille 1, BAIM, IFR,ESIL, Lab Microbiol IRD, F-13288 Marseille 9, FranceICIDCA, Dept Bioengn, Havana 11000, CubaIRD Mexico, Mexico City 11530, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Chem Engn, Mexico City 09340, DF, MexicoChristen, P, Univ Aix Marseille 1, BAIM, IFR,ESIL, Lab Microbiol IRD, Case 925,163 Ave Luminy, F-13288 Marseille 9, France TI - Biofiltration of volatile ethanol using sugar cane bagasse inoculated with Candida utilis AB - Candida utilis (C utilis) growing on sugar cane bagasse complemented with a mineral salt solution was studied for gaseous ethanol removal in a biofilter. Ethanol loads from 93.7 to 511.9 g/h m(3) were used, by varying both inlet ethanol concentration (9.72 to 52.4 g/m(3)) and air flow rate (1.59 x 10(-3) to 2.86 x 10(-3) m(3)/h). At a loading rate of 933 g/h m(3), a steady-state was maintained for 300 h. Ethanol removal was complete, and 76.3% of the carbon consumed was found in carbon dioxide. At an higher aeration rate (ethanol load = 153.8 g/h m(3)), the biofilter displayed an average removal efficiency (RE) of 70%, and an elimination capacity (EC) of 107.7 g/h m(3). Only 64.4% of the carbon consumed was used for CO2 production. Acetaldehyde and ethyl acetate in the outlet gas attained 7.86 and 20.4% in terms of carbon balance, respectively. In both cases, the transient phase was less than one day. At a high inlet ethanol concentration (52.4 g/m(3)), no steady-state was observed and the process stopped during the third day. In the three cases, final biomass was poor, ranging from 10.5 to 14.8 mg/g dm. Final pH 4.0-4.6, indicated that acidifying non-volatile metabolites, such as acetate, accumulated in the reactor. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0304-3894 UR - ISI:000173119600011 L2 - biofiltration;Candida utilis;ethanol;mass balance;sugar cane bagasse;BIOFILTER; VAPORS; REMOVAL; TOLUENE; GROWTH; GAS SO - Journal of Hazardous Materials 2002 ;89(2-3):253-265 5119 UI - 9513 AU - Chrobak M AU - Epstein L AU - Noga J AU - Sgall J AU - van Stee R AU - Tichy T AU - Vakhania N AD - Univ Calif Riverside, Dept Comp Sci, Riverside, CA 92521, USASch Comp Sci, Interdisciplinary Ctr, IL-46150 Herzliyya, IsraelCalif State Univ Northridge, Dept Comp Sci, Northridge, CA 91330, USAAS CR, Math Inst, CZ-11567 Prague 1, Czech RepublicUniv Freiburg, Inst Informat, D-79110 Freiburg, GermanyUniv Autonoma Esrtado Morelos, Fac Ciencias, Cuernavaca 62251, Morelos, MexicoChrobak, M, Univ Calif Riverside, Dept Comp Sci, Riverside, CA 92521 USA TI - Preemptive scheduling in overloaded systems AB - The following scheduling problem is studied: We are given a set of tasks with release times, deadlines, and profit rates. The objective is to determine a I-processor preemptive schedule of the given tasks that maximizes the overall profit. In the standard model, each completed task brings profit, while non-completed tasks do not. In the metered model, a task brings profit proportional to the execution time even if not completed. For the metered task model, we present an efficient offline algorithm and improve both the lower and upper bounds on the competitive ratio of online algorithms. Furthermore, we prove three lower bound results concerning resource augmentation in both models MH - Czech Republic MH - Germany MH - Israel MH - Mexico|Morelos MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000180069500068 L2 - ONLINE SO - Automata, Languages and Programming 2002 ;2380():800-811 5120 UI - 11638 AU - Chuenpagdee R AU - Fraga J AU - Euan-Avila JI AD - Coll William & Mary, Virginia Inst Marine Sci, Gloucester Point, VA 23062, USAIPN, Ctr Invest & Estudios Avanzados, Dept Ecol Humana, Unidad Merida, Yucatan, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Recursos Mar, Unidad Merida, Yucatan, MexicoChuenpagdee, R, Coll William & Mary, Virginia Inst Marine Sci, POB 1346, Gloucester Point, VA 23062 USA TI - Community perspectives toward a marine reserve: A case study of San Felipe, Yucatan, Mexico AB - San Felipe marine reserve, in Yucatan, Mexico, is unique, and particularly suited for a case study because the local community created it without a mandate from higher levels of government. This article presents the results of a survey of local interest groups using the method of paired comparisons and rank correlation analysis, to reveal local judgments about the severity of damages to coastal habitats and the level of impacts of activities that cause the damages. The results show that fishers differ significantly from other interest groups in their rankings of the severity of damages to habitats and of impacting activities. These findings suggest that despite the overlapping interests in protecting the resources and the critical habitats, the different perspectives of local interest groups about the severity of damages must be considered in the management of San Felipe marine reserve MH - Mexico|Yucatan MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0892-0753 UR - ISI:000174297200005 L2 - community perspectives;marine reserve;severity rankings SO - Coastal Management 2002 ;30(2):183-191 5121 UI - 9620 AU - Churyumov KI AU - Luk'yanyk IV AU - Berezhnoi AA AU - Chavushyan VH AU - Sandoval LS AU - Palma AA AD - Kyiv Natl Shevchenko Univ, Astron Observ, Kiev, UkraineInst Nacl Astrofis Opt & Elect, Puebla, MexicoSternberg Astron Inst, Moscow, RussiaBenemerita Univ Autonoma Puebla, Puebla, MexicoChuryumov, KI, Kyiv Natl Shevchenko Univ, Astron Observ, Kiev, Ukraine TI - Optical spectroscopy of comet C/2000 WM1 (LINEAR) at the Guillermo Haro Astrophysical Observatory in Mexico AB - We present a preliminary analysis of medium resolution optical spectra of comet C/2000 WM1 (LINEAR) obtained on 22 November 2001. The emission lines of the molecules C-2, C-3, CN, NH2, H2O+ and presumably CO (Asundi and triplet bands) and C-2(-) were identified in these spectra. By analysing the brightness distributions of the C-2, C3(,) CN emission lines along the slit of the spectrograph we determined some physical parameters of these neutrals, such as their lifetimes and expansion velocities in the coma. The Franck-Condon factors for the CO Asundi bands and C-2(-) bands were calculated using a Morse potential model MH - Mexico|Puebla MH - Russia MH - Ukraine PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0167-9295 UR - ISI:000179660800037 L2 - C-2;C-3;CN;comet C/2000 WM1 (LINEAR);expansion velocity;Franck-Condon factors;negative ions;optical spectroscopy;EMISSION; C-2 SO - Earth Moon and Planets 2002 ;90(1-4):361-368 5122 UI - 11900 AU - Cifuentes E AU - Mazari-Hiriart M AU - Carneiro F AU - Bianchi F AU - Gonzalez D AD - CENSA, CISP, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoCtr Mineiro Estudos Epidemiol & Ambientais, BR-31310580 Belo Horizonte, MG, BrazilWilfrid Laurier Univ, Dept Geog, Waterloo, ON N2L 3C5, CanadaCifuentes, E, CENSA, CISP, Inst Nacl Salud Publ, Av Univ 655,Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - The risk of enteric diseases in young children and environmental indicators in sentinel areas of Mexico City AB - The overall objective of this study is to promote the development of environmental health indicators in Mexico City. Specific examples focused on water quality, household characteristics e.g., sanitation and risk of enteric diseases. A geographic information system (GIS) was used in order to identify eligible wells and their surrounding homesteads (0.5 km around each well). A pilot study was conducted during the rainy season (1999), and a total of 1, 250 eligible households were visited on a random sample basis; only those having children under 5 years of age were interviewed. Data on diarrheal disease (i.e. occurrence in the previous two weeks) were obtained from 950 children, and their guardians provided information on their water supply, sanitation and socioeconomic variables. A total of 320 water samples were obtained from 40 wells, and tested for Total coliforms (TC/100 ml), Fecal coliforms (FC/100 ml). Escherichia coli (EC) and Fecal streptococci (FS). Bacterial indicators were detected in 40% of the wells in the western zone and in 32% of the southern zone (p = 0.01). The rate of diarrheal diseases was higher for children from the southern areas than in the west (OR = 1.7 and 95% CI: 0.99, 2.86). The final analysis showed a higher risk of diarrhea in children from rented homes than those living in owned dwellings (OR = 1.7 and 95% Cl: 1.04, 2.77): the risk was also highest for children living in houses with poor sanitation facilities (e.g., latrine) than those connected to a sewerage (OR = 1.7 and 95% Cl: 1.00, 2.93). Children from households perceiving unpleasant taste of water showed a higher risk than those without complaints (OR = 2.2 and 95% Cl: 1.28, 3.75). Linkages between environmental factors and health risk were created from spatially distributed information, and the proposed environmental health indicator (EHI) summarized the most significant predictors of diarrheal diseases. This baseline information may contribute to further environmental health investigation and policy making analysis MH - Brazil MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0960-3123 UR - ISI:000173645000005 L2 - health risk;groundwater;sanitation;diarrhea;Mexico City;DIARRHEAL DISEASES; SANITATION SO - International Journal of Environmental Health Research 2002 ;12(1):53-62 5123 UI - 10922 AU - Cira LA AU - Huerta S AU - Hall GM AU - Shirai K AD - Univ Autonoma Metropolitana, Dept Biotecnol, Vicentina 09340, MexicoUniv Loughborough, Dept Chem Engn, Loughborough, Leics, EnglandShirai, K, Univ Autonoma Metropolitana, Dept Biotecnol, DF Av San Rafael Atlixco 186, Vicentina 09340, Mexico TI - Pilot scale lactic acid fermentation of shrimp wastes for chitin recovery AB - Lactic fermentation of shrimp waste on solid substrates was studied as a means of preservation for chitin recovery. Shrimp wastes were fermented in 100-g flasks with varying levels of inoculation with lactobacilli as well as different types and levels of carbohydrate. Sucrose was selected as the carbohydrate source in further experimental work due to its better acid production potential as compared to lactose and milk whey powder. Lactic acid fermentation was scaled-up from 2 to 30 kg in column reactors using geometric similarity as the scale-up criterion. The pH rapidly decreased to less than 5.0, allowing preservation of wastes for at least 3 months. During ensilation, deproteinisation and demineralisation were observed. Chitin obtained from the silage was treated with acid and alkali for mineral and protein removal. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0032-9592 UR - ISI:000176219300003 L2 - chitin;proteins;lactic acid fermentation;silage;Lactobacillus spp.;SHELL WASTE SO - Process Biochemistry 2002 ;37(12):1359-1366 5124 UI - 11867 AU - Cisneros J AU - Goulson D AU - Derwent LC AU - Penagos DI AU - Hernandez O AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoUniv Southampton, Southampton SO16 7PX, Hants, EnglandWilliams, T, ECOSUR, Carr Ant Aeropuerto KM2-5,AP 36, Tapachula 30700, Chiapas, Mexico TI - Toxic effects of spinosad on predatory insects AB - Spinosad (Dow AgroSciences) is a mixture of tetracyclic-macrolide compounds produced by a soil actinomycete and has been classified as a bioinsecticide. Spinosad is highly active against Lepidoptera but is reported to be practically nontoxic to insect natural enemies. We assessed the impact of Spinosad in a granular maize-flour formulation on a selection of insect predators over periods of 2-14 days. In all cases, the quantities of Spinosad used were less than the maximum recommended rates given on the product label. Adults of Aleochara bilineata Gyllenhal (Coleoptera: Staphylinidae) suffered a high prevalence of mortality following consumption of 1000 or 2000 ppm Spinosad active ingredient (a.i.), but little mortality at 200 ppm. Larvae of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) did not consume the granular formulation and suffered little overall mortality. After 14 days of exposure, the earwig, Doru taeniatum (Dohrn) (Dermaptera:Forficulidae), suffered 48% mortality in the 1.2 ppm Spinosad treatment increasing to 98% in the 1200 ppm Spinosad treatment compared to 20% in controls. Earwigs suffered 86% mortality/intoxication 72 h after feeding on Spinosad-contaminated Spodoptera frugiperda J. E. Smith (Lepidoptera:Noctuidae) larvae. A field trial was performed to compare applications of commercial granular chlorpyrifos and Spinosad in maize-flour granules (200 and 2000 ppm ad.; 4.8-48 g a.i./ha, respectively) or as an aqueous spray (160 ppm ad.; 48 g a.i/ha) on earwigs held inside gauze bags. Mortality of earwigs on control plants was less than 15% at 2 days postapplication compared to 33% on plants treated with granular chlorpyrifos, 83% on plants sprayed with 160 ppm Spinosad, and 91-95% on plants treated with 200-2000 ppm Spinosad granules, respectively. Further mortality in the 24-h period postsampling ranged from <5% in control treatments, to 9% in the chlorpyrifos treatment, and to 55-65% in the Spinosad spray and granule treatments. We conclude that Spinosad cannot be considered to have an environmental safety profile similar to most established biological insecticides. (C) 2002 Elsevier Science MH - United Kingdom MH - Mexico|Chiapas PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 19 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000173596500008 L2 - Spinosad;toxicity;natural enemies;formulation;Forficulidae;BACILLUS-THURINGIENSIS; LEPIDOPTERA; FORMULATIONS; NOCTUIDAE; FIELD; LARVAE; MAIZE SO - Biological Control 2002 ;23(2):156-163 5125 UI - 12005 AU - Cisneros J AU - Perez JA AU - Penagos DI AU - Ruiz J AU - Goulson D AU - Caballero P AU - Cave RD AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoIPN, CIIDIR, Indeco Xo Xo, Oaxaca, MexicoUniv Southampton, Sch Biol Sci, Southampton SO16 7PX, Hants, EnglandUniv Publ Navarra, Dept Prod Agraria, Pamplona 31006, SpainEscuela Agricola Panamericana, El Zamorano, HondurasWilliams, T, ECOSUR, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Formulation of a nucleopolyhedrovirus with boric acid for control of Spodoptera frugiperda (Lepidoptera : Noctuidae) in maize AB - The degree of control of the fall armyworm, Spodoptera frugiperda, by a multiple nucleopolyhedrovirus (SfMNPV) appears to be limited by the quantity of inoculum consumed by the insect and the delivery of the virus to the insect feeding site. The formulation of the virus with phagostimulants and/or viral synergists, such as boric acid, may help overcome this problem. The present study aimed to determine the degree of potentiation of boric acid toward SfMNPV in a granular phagostimulant formulation. In a laboratory bioassay the LC50 value for second-instar larvae was reduced from 114 virus occlusion bodies (OBs)/mm(2) of diet surface for virus alone to 51 OBs/mm(2) of diet in the presence of 1% boric acid. The mean time to death of larvae exposed to virus mixed with 0.5 or 1% boric acid was not significantly different from that of larvae inoculated with virus alone. Increasing the concentration of boric acid at a single determined concentration of virus (80 OBs/mm(2)) resulted in a significant increase in the prevalence of virus-induced mortality. The boric acid alone did not cause S. frugiperda mortality at the concentrations tested. A field trial performed with S. frugiperda larvae held on plants within fine gauze bags indicated that application of maize flour granules containing virus + 1% boric acid caused a significant increase in virus-induced mortality compared to application of granules containing virus alone. A randomized block experiment performed later also resulted in a higher prevalence of virus-induced mortality in S. frugiperda larvae exposed to virus mixed with 1% boric acid in samples collected at 5 days postapplication and reared in the laboratory until death or pupation, but not in samples made at 1 day and 3 days postapplication. Differences in the prevalence of virus infection in insects collected at each time point may have been related to the consistency of the granular formulation, which turned into a paste and adhered to the surface of maize plants under conditions of heavy rainfall. Granules containing 1 and 4% boric acid were not toxic to the earwig, Doru taeniatum, in the laboratory. The same concentrations of boric acid sprayed onto maize plants did not significantly reduce the abundance of natural enemies or other nontarget insects at any sample time point. Boric acid offers an economical means of enhancing baculovirus activity with little apparent risk to nontarget arthropods. (C) 2002 Elsevier Science MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Mexico|Oaxaca MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000173275300010 L2 - baculovirus;fall armyworm;potentiation;phagostimulant;nontarget effects;NUCLEAR POLYHEDROSIS-VIRUS; BACULOVIRUS BIOINSECTICIDE; BACILLUS-THURINGIENSIS; OPTICAL BRIGHTENER; LYMANTRIIDAE; CANNIBALISM; NICARAGUA; STRAINS; AMERICA SO - Biological Control 2002 ;23(1):87-95 5126 UI - 10837 AU - Cisneros MM AU - Lopez HF AU - Mancha H AU - Vazquez D AU - Valdes E AU - Mendoza G AU - Mendez M AD - Inst Tecnol Saltillo, Dept Met Mecan, Saltillo, Coahuila, MexicoUniv Wisconsin, Dept Mat, Milwaukee, WI 53201, USAIPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoCisneros, MM, Inst Tecnol Saltillo, Dept Met Mecan, Saltillo, Coahuila, Mexico TI - Development of austenitic nanostructures in high-nitrogen steel powders processed by mechanical alloying AB - In this work, mechanical alloying was employed in producing high-nitrogen Fe1 8Cr11Mn stainless-steel powders. It was found that the nitrogen solubility in the powder mixtures increases exponentially with milling time at room temperature. Maximum nitrogen levels of 2.47 wt pet N were achieved after milling for 170 hours. In addition, the grain size structure continually decreased and reached a plateau at nanometric grain sizes of the order of 3 nm. In addition, measured, interplanar lattice spacing, d((110)), did not follow a linear trend. Apparently, initially the nitrogen tendency was to be preferentially dissolved at dislocations and grain boundaries. However, after long milling times, the crystal lattice tended to be saturated with N. Annealing at 900 degreesC to 1200 degreesC for 2 hours led to various microstructures, where the matrix was almost always gamma-iron, but Cr2N, CrN, and alpha-iron were also present depending on the annealing temperatures. In particular, it was found that a fully austenitic, nanometric grain structure can be achieved by annealing at 1000 degreesC and 1100 degreesC Fe18Cr11Mn alloys with 1.02 and 0.7 wt pct N, respectively MH - Mexico|Coahuila MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000176532600025 L2 - GRAIN-GROWTH; THERMAL-STABILITY; STAINLESS-STEELS; BEHAVIOR SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2002 ;33(7):2139-2144 5127 UI - 6838 AU - Clark GG AU - Martinez HQ AD - Ctr Dis Control & Prevent, Dengue Branch, San Juan, PR 00920, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Entomol Lab, San Nicolas De Los Garza, Nuevo Leon, MexicoClark, GG, Ctr Dis Control & Prevent, Dengue Branch, 1324 Calle Canada, San Juan, PR 00920 USA TI - Mosquito Vector Control and Biology in Latin America - A Twelfth Symposium AB - The 12th annual Latin American symposium presented by the American Mosquito Control Association (AMCA) was held as part of the 68th Annual Meeting in Denver, CO, in February 2002. The principal objective, as for the previous I I symposia, was to promote participation in the AMCA by vector control specialists, public health workers, and academicians from Latin America. This publication includes summaries of 35 presentations that were given orally in Spanish or presented as posters by participants from 7 countries in Latin America. Topics addressed in the symposium included results from chemical and biological control programs and studies; studies of insecticide resistance; and population genetics, molecular, ecological, and behavioral studies of vectors of dengue (Aedes aegypti and Aedes albopictus) and other arboviruses, malaria (Anopheles albimanus and Anopheles pseudopunctipennis), leishmaniasis (Lutzomyia), and Chagas Disease (Triatoma). Related topics included biology and control of Culiseta inornata, Ochlerotatus taeniorhynchus, scorpions, Chironomus plumosus, and Musca domestica MH - Mexico|Nuevo Leon MH - USA PB - EATONTOWN: AMER MOSQUITO CONTROL ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Editorial Material AV - English IS - 8756-971X UR - ISI:000186837300002 L2 - mosquitoes;mosquito control;bionomics;Aedes;Anopheles;Culiseta;Ochlerotatus;Lutzomyia;Triatoma;scorpions;Loxosceles;Musca domestica;Chironomus;insecticide resistance SO - Journal of the American Mosquito Control Association 2002 ;18(3):138-138 5128 UI - 9879 AU - Clark S AU - Krishna U AU - Kallenbach L AU - Mandlekar A AU - Raote V AU - Ellertson C AD - Populat Council, Mexico City, DF, MexicoLarsen & Toubro Hlth Ctr, Bombay, Maharashtra, IndiaPopulat Council, New York, NY 10021, USAEllertson, C, Populat Council, Mexico City, DF, Mexico TI - Women's preferences for general or local anesthesia for pain during first trimester surgical abortion in India AB - Women in India are rarely given a choice about their pain management methods for first trimester abortions. To investigate women's preferences and perceptions of pain, we allowed 100 women in Mumbai to choose between local and general anesthesia (60% selected general, while 40% elected local anesthesia). Using visual analog scales ranging from I to 7, women characterized their pain several times during their abortion visits. Local anesthesia clients reported more pain during (2.3 local vs. 1.0 general) and immediately after (1.9 vs. 1.0) the procedure. By three hours post-procedure, none of the women in either group reported any pain. General anesthesia clients reported that having no pain (95%) or anxiety (38%) were the best features, while local anesthesia clients liked being ambulatory (26%), avoiding side effects (26%), and feeling awake (21%). Though women in both groups were satisfied, local anesthesia clients were more likely to recommend it to friends (95% vs. 85%). Given these advantages, our study suggests that some women willingly accept additional pain incurred by exchanging local for general anesthesia. (C) 2002 Elsevier Science Inc. All rights reserved MH - India MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000179192400012 L2 - abortion;pain;anesthesia SO - Contraception 2002 ;66(4):275-279 5129 UI - 10506 AU - Clarke KE AU - Rinderer TE AU - Franck P AU - Quezada-Euan JG AU - Oldroyd BP AD - Univ Sydney, Sch Biol A12, Sydney, NSW 2006, AustraliaUSDA ARS, Honey Bee Breeding Genet & Physiol Res Lab, Baton Rouge, LA 70820, USACtr Biol & Gest Populat, F-34988 St Gely Fec, FranceUniv Autonoma Yucatan, Fac Med Vet & Zootecnica, Yucatan 97100, MexicoClarke, KE, Univ Sydney, Sch Biol A12, Sydney, NSW 2006, Australia TI - The Africanization of honeybees (Apis mellifera L.) of the Yucatan: A study of a massive hybridization event across time AB - Until recently, African and European subspecies of the honeybee (Apis mellifera L.) had been geographically separated for around 10,000 years. However, human-assisted introductions have caused the mixing of large populations of African and European subspecies in South and Central America, permitting an unprecedented opportunity to study a large-scale hybridization event using molecular analyses. We obtained reference populations from Europe. Africa, and South America and used these to provide baseline information for a microsatellite and mitochondrial analysis of the process of Africanization of the bees of the Yucatan Peninsula, Mexico. The genetic structure of the Yucatecan population has changed dramatically over time. The pre-Africanized Yucatecan population (1985) comprised bees that were most similar to samples from southeastern Europe and northern and western Europe. Three years after the arrival of Africanized bees (1989). substantial paternal gene flow had occurred from feral Africanized drones into the resident European population, but maternal gene flow from the invading Africanized population into the local population was negligible. However by 1998, there was a radical shift with both African nuclear alleles (65%) and African-derived mitochondria (61%) dominating the genomes of domestic colonies. We suggest that although European mitochondria may eventually be driven to extinction in the feral population, stable introgression of European nuclear alleles has occurred MH - Australia MH - France MH - Mexico|Yucatan MH - USA PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 25 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000177434400014 L2 - Africanized bee;Apis mellifera;gene flow;honeybee;hybridization;microsatellites;MITOCHONDRIAL-DNA VARIABILITY; POPULATION-STRUCTURE; GENETIC-STRUCTURE; TROPICAL YUCATAN; BEE POPULATIONS; HYBRID ZONES; ORIGIN; MICROSATELLITE; PENINSULA; LIGUSTICA SO - Evolution 2002 ;56(7):1462-1474 5130 UI - 11707 AU - Clemente MEN AU - Saavedra PJ AU - Vasquez MC AU - Paz-Sandoval MA AU - Arif AM AU - Ernst RD AD - Inst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Utah, Dept Chem, Salt Lake City, UT 84112, USAPaz-Sandoval, MA, Inst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Syntheses, structures, and reactivity studies of half-open ruthenocenes and their oxodienyl analogues AB - Improved synthetic routes to Cp*Ru(Pdl) complexes (Pdl = 2,4-dimethylpentadienyl and various oxodienyl ligands) including Cp*Ru(eta(5)-2,4-Me-2-C4H3O) (1), Cp*Ru[eta(5)-2,4-(t-Bu)(2)-C4H3O] (1'), and CP*Ru(eta(5)-2,4-Me-2-C5H5) (1") have been developed, and the relative reactivities of the resulting complexes toward oxidative addition or ligand addition reactions have been examined. Thus, the oxopentadienyl complexes 1 and 1' and the 2,4-dimethylpentadienyl complex 1" were found to undergo oxidative addition of SnCl4, Me-2,SnCl2, I-2, Cl-2 (via CHCl3), and O-2, yielding Cp*Ru[eta(3)-CH2C(R)CHC(R)O](X-1)(X-2) [R = Me, X-1 Cl, X-2 = SnCl3 (2); R = Me, X-1 = X-2 = I (3); R = t-Bu, X-1 = X-2 = I, (3'); R = Me, X-1 = X-2 Cl (4); R = t-Bu, X-1 = X-2 = Cl (4')] or Cp*Ru[eta(3)-CH2C(Me)CHC(Me)CH2](X-1)(X-2) [(X-1) = Cl, (X-2) = SnClMe2 (2a"); (X-1) = (X-2) = I-2 (3"); (X-1) = (X-2) = Cl-2 (4")] and a peroxide Cp*Ru[eta(3)-CH2C-(Me)CHC(MeO](O-2) (5) readily, the oxodienyl products having eta(3)-oxodienyl coordination occurring preferentially through an all-carbon allylic fragment, in line with ruthenium's soft nature. The O-2 reaction was of additional interest in that it also led to a product in which oxidation of the Cp* ligand to a C5Me4(CHO) ligand had occurred, giving (eta(5)-C5Me4-CHO)Ru[eta(5)-CH2C(Me)CHC(Me)O] (6). In contrast to the above, reactions of the 2,4-di(tertbutyl)oxodienyl or 2,4-dimethylpentadienyl ligand complexes were much less favorable, occurring much more slowly, if at all. For the reaction of CHCl3 with the 2,4-dimethylpentadienyl complex, a small amount of an eta(6)-toluene complex, [Cp*Ru(eta(6)-C7H8)][Cp*RuCl3] (11), was formed, apparently as a result of a carbon-carbon bond activation, giving a rearrangement of the dienyl ligand. The additions of Lewis bases to the oxodienyl complexes, leading to Cp*Ru[eta(3)-CH2C(Me)CHC(Me)O]L species [L = PPh3 (7), PHPh2 (8), PMe3 (9), CO (10)], were most facile for small donors such as PMe3, while PPh3 and CO additions were more reversible. Structural data have been obtained for representative examples of the above, i.e., complexes 1, 1', 2, 5, 6, 7, and 11 MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000174013500005 L2 - X-RAY STRUCTURES; RING-METHYL ACTIVATION; CP-ASTERISK-RU+; PENTAMETHYLCYCLOPENTADIENYL-RUTHENIUM COMPLEXES; SILOXY-SUBSTITUTED DIENE; CARBON-CHLORINE BONDS; CRYSTAL-STRUCTURE; OXIDATIVE ADDITION; ALLYL COMPLEXES; (PENTAMETHYLCYCLOPENTADIENYL)RUTHENIUM COMPLEXES SO - Organometallics 2002 ;21(4):592-605 5131 UI - 10466 AU - Cocke DL AU - Mollah MYA AU - Parga JR AD - Lamar Univ, Dept Chem, Beaumont, TX 77710, USALamar Univ, Dept Chem Engn, Beaumont, TX 77710, USATechnol Inst Saltillo, Dept Met & Mat Sci, Saltillo, Coahuila, Mexico TI - Electrocoagulation: An evolving electrochemical technology for wastewater treatment MH - Mexico|Coahuila MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000177422202681 SO - Abstracts of Papers of the American Chemical Society 2002 ;224():U527-U527 5132 UI - 10102 AU - Cocker MA AU - Goodoff LR AU - Cuevas-Leree JA AU - Martinez-Sierra R AU - Hernandez-Mendoza JJ AU - Hamilton DS AD - Scotia Grp Inc, Houston, TX, USAPemex Explorat & Prod, Reynosa, MexicoHamilton Geosci, Austin, TX, USACocker, MA, Scotia Grp Inc, Houston, TX, USA TI - Burgos targets - 2 - Frio-Vicksburg exploration focus areas identified in Mexico's Burgos basin MH - Mexico|Tamaulipas MH - USA PB - TULSA: PENNWELL PUBL CO ENERGY GROUP RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels;Engineering, Petroleum U5 - J;Article AV - English IS - 0030-1388 UR - ISI:000178386200014 SO - Oil & Gas Journal 2002 ;100(40):46-+ 5133 UI - 10212 AU - Cocker MA AU - Goodoff LR AU - Leree JAC AU - Sierra RM AU - Mendoza JJH AU - Hamilton DS AD - Scotia Grp Inc, Houston, TX, USAPemex Explorat & Prod, Reynosa, MexicoHamilton Geosci, Austin, TX, USACocker, MA, Scotia Grp Inc, Houston, TX, USA TI - Burgos targets - 1: Burgos basin play analysis reveals Frio-Vicksburg exploration focus areas MH - Mexico|Tamaulipas MH - USA PB - TULSA: PENNWELL PUBL CO ENERGY GROUP RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Engineering, Petroleum U5 - J;Article AV - English IS - 0030-1388 UR - ISI:000178237200011 SO - Oil & Gas Journal 2002 ;100(39):34-+ 5134 UI - 11149 AU - Cocoletzi GH AU - Takeuchi N AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoTakeuchi, N, CeCiMac UNAM, POB 439036, San Ysidro, CA 92143, USA TI - First principles total energy calculations of the Al induced Si(001)-(3 x 4) reconstruction AB - First principles total energy calculations were performed to investigate the Si(0 0 1)-(3 x 4)-Al reconstruction obtained when Al is deposited at high temperatures. Three different models were considered in the optimization of the surface atomic structure. The first one was based in the model schematically proposed by Zhu et al. to explain their STM images of Al on Si(0 0 1). The other two models. due to Zotov et al. [Phys. Rev. B 57 (1998) 12492] and Bunk et al. [Appl. Surf. Sci. 123-124 (1998) 104] respectively. have been previously. proposed to explain a similar reconstruction for the Si(0 0 1)-In system. Results show that the structure based on Bunk's et al. model yields the most stable configuration. The formation of pyramid-like Al-subunits is clearly manifested with a trimer on top. The trimer is formed by a Si atom occupying the highest vertical position and bound to two Al atoms with lower vertical positions. Local density of state images were calculated for this model and compared with the experimental STM measurement of Zhu et al. [Phys. Rev. B 59 (1999) 9760] giving excellent results. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000175557700015 L2 - ab initio quantum chemical methods and calculations;aluminum;silicon;surface relaxation and reconstruction;SCANNING-TUNNELING-MICROSCOPY; SURFACE PHASE; STRUCTURAL MODEL; SI(100) SURFACE; GROWTH; DIFFRACTION; TEMPERATURE; ADSORPTION; GA SO - Surface Science 2002 ;504(1-3):101-107 5135 UI - 8436 AU - Coello CAC AU - Montes EM AD - CINVESTAV, IPN, Dept Ingn Electr, Secc Computac, Mexico City 07300, DF, MexicoCoello, CAC, POB 60326-394, Houston, TX 77205, USA TI - Constraint-handling in genetic algorithms through the use of dominance-based tournament selection AB - In this paper, we propose a dominance-based selection scheme to incorporate constraints into the fitness function of a genetic algorithm used for global optimization. The approach does not require the use of a penalty function and, unlike traditional evolutionary multiobjective optimization techniques, it does not require niching (or any other similar approach) to maintain diversity in the population. We validated the algorithm using several test functions taken from the specialized literature on evolutionary optimization. The results obtained indicate that the approach is a viable alternative to the traditional penalty function, mainly in engineering optimization problems. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 24 U4 - Computer Science, Artificial Intelligence;Engineering, Multidisciplinary U5 - J;Article AV - English IS - 1474-0346 UR - ISI:000182977100003 L2 - genetic algorithms;constraint-handling;multiobjective optimization;self-adaptation;evolutionary optimization;numerical optimization;EVOLUTIONARY OPTIMIZATION SO - Advanced Engineering Informatics 2002 ;16(3):193-203 5136 UI - 10917 AU - Coello CAC AU - Aguirre AH AD - CINVESTAV, IPN, Dept Ingn Elect, Secc Computac, Mexico City 07300, DF, MexicoTulane Univ, Dept Comp Sci & Elect Engn, New Orleans, LA 70118, USA TI - Design of combinational logic circuits through an evolutionary multiobjective optimization approach AB - In this paper, we propose a population-based evolutionary multiobjective optimization approach to design combinational circuits. Our results indicate that the proposed approach can significantly reduce the computational effort required by a genetic algorithm (GA) to design circuits at a gate level while generating equivalent or even better solutions (i.e., circuits with a lower number of gates) than a human designer or even other GAs. Several examples taken from the literature are used to evaluate the performance of the proposed approach MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Computer Science, Artificial Intelligence;Computer Science, Interdisciplinary Applications;Engineering, Multidisciplinary;Engineering, Manufacturing U5 - J;Article AV - English IS - 0890-0604 UR - ISI:000176252400004 L2 - circuit design;evolvable hardware;evolutionary multiobjective optimization;genetic algorithms;multiobjective optimization SO - Ai Edam-Artificial Intelligence for Engineering Design Analysis and Manufacturing 2002 ;16(1):39-53 5137 UI - 11039 AU - Coello CAC AU - Gutierrez RLZ AU - Garcia BM AU - Aguirre AH AD - IPN, CINVESTAV, Dept Ingn Elect, Secc Computac Av,Inst Politecn Nacl, Mexico City, DF, MexicoLANIA UV, MIA, Lab Nacl Informat Avanzada, Xalapa, Veracruz, MexicoTulane Univ, EECS Dept, New Orleans, LA 70118, USACoello, CAC, IPN, CINVESTAV, Dept Ingn Elect, Secc Computac Av,Inst Politecn Nacl, 2508 Col San Pedro Zacatenco, Mexico City, DF, Mexico TI - Automated design of combinational logic circuits using the Ant System AB - This paper proposes an application of the Ant System (AS) to optimize combinational logic circuits at the gate level. A measure of quality improvement is defined in partially built circuits to compute the distances required by the AS, and those solutions that represent functional circuits with a minimum number of gates are considered as optimal. The proposed methodology is described together with some examples taken from the literature that illustrate the feasibility of the approach MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Multidisciplinary;Operations Research & Management Science U5 - J;Article AV - English IS - 0305-215X UR - ISI:000175960900001 L2 - circuit design;ant colony system;evolvable hardware;circuit optimization SO - Engineering Optimization 2002 ;34(2):109-127 5138 UI - 12000 AU - Coello CAC AD - CINVESTAV, IPN, Dept Ingn Elect, Secc Comp, Mexico City 07300, DF, MexicoCoello, CAC, POB 60326-394, Houston, TX 77205, USA TI - Theoretical and numerical constraint-handling techniques used with evolutionary algorithms: a survey of the state of the art AB - This paper provides a comprehensive survey of the most popular constraint-handling techniques currently used with evolutionary algorithms. We review approaches that go from simple variations of a penalty function, to others, more sophisticated, that are biologically inspired on emulations of the immune system, culture or ant colonies. Besides describing briefly each of these approaches (or groups of techniques), we provide some criticism regarding their highlights and drawbacks. A small comparative study is also conducted, in order to assess the performance of several penalty-based approaches with respect to a dominance-based technique proposed by the author, and with respect to some mathematical programming approaches. Finally, we provide some guidelines regarding how to select the most appropriate constraint-handling technique for a certain application. and we conclude with some of the most promising paths of future research in this area. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 93 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications;Mechanics U5 - J;Review AV - English IS - 0045-7825 UR - ISI:000173304000009 L2 - evolutionary algorithms;constraint handling;evolutionary optimization;GENETIC ALGORITHMS; OPTIMAL-DESIGN; OPTIMIZATION; SEARCH; PROPAGATION; NETWORK; GRAPH SO - Computer Methods in Applied Mechanics and Engineering 2002 ;191(11-12):1245-1287 5139 UI - 11873 AU - Cohen FR AU - Gitler S AD - Univ Rochester, Dept Math, Rochester, NY 14627, USACINVESTAV, Dept Matemat, Mexico City 07300, DF, MexicoCohen, FR, Univ Rochester, Dept Math, Rochester, NY 14627, USA TI - On loop spaces of configuration spaces AB - This article gives an analysis of topological and homological properties for loop spaces of configuration spaces. The main topological results are given by certain choices of product decompositions of these spaces, as well as "twistings" between the factors. The main homological results are given in terms of extensions of the "infinitesimal braid relations" or "universal Yang-Baxter Lie relations" MH - Mexico|Distrito Federal MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000173651800001 L2 - braid groups;configuration spaces;descending central series;loop spaces;HOMOLOGY SO - Transactions of the American Mathematical Society 2002 ;354(5):1705-1748 5140 UI - 11967 AU - Cohen FR AU - Xicotencatl MA AD - Max Planck Inst Math, D-53072 Bonn, GermanyCINVESTAV, Dept Matemat, Mexico City 07300, DF, MexicoUniv Rochester, Dept Math, Rochester, NY 14627, USAXicotencatl, MA, Max Planck Inst Math, POB 7280, D-53072 Bonn, Germany TI - On orbit configuration spaces associated to the Gaussian integers: Homotopy and homology groups AB - The purpose of this article is to analyze several Lie algebras associated to "orbit configuration spaces" obtained from the standard integral lattice Z + iZ in the complex numbers. The Lie algebra obtained from the descending central series for the associated fundamental group is shown to be isomorphic, up to a regrading, to the Lie algebra obtained from the higher homotopy groups of "higher dimensional arrangements" modulo torsion. The resulting Lie algebras are similar to those studied by T. Kohno associated to elliptic KZ systems [Topology Appl. 78 (1997) 79-94]. A question about the generality of this behavior is posed. (C) 2002 Elsevier Science B.V All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000173288800003 L2 - orbit configuration space;descending central series;loop space homology;integral lattice SO - Topology and Its Applications 2002 ;118(1-2):17-29 5141 UI - 9408 AU - Coimbra JC AU - Arai M AU - Carreno AL AD - Univ Fed Rio Grande Sul, Dept Paleontol & Estratig, Inst Geociencias, BR-91501970 Porto Alegre, RS, BrazilPetr Brasileiro SA, CENPES, PDEP, BPA, BR-21949900 Rio De Janeiro, RJ, BrazilNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoCoimbra, JC, Univ Fed Rio Grande Sul, Dept Paleontol & Estratig, Inst Geociencias, CxP 15001, BR-91501970 Porto Alegre, RS, Brazil TI - Biostratigraphy of Lower Cretaceous microfossils from the Araripe Basin, northeastern Brazil AB - A biostratigraphic study was carried out in the Lower Cretaceous Araripe basin, northeastern Brazil, allowing the recognition of several chronostratigraphic units: the Dom Jodo (Jurassic?-Lower Cretaceous?), the Rio da Serra (Neocomian) and the Alagoas (Aptian/Albian) local stages. For the first time a large hiatus between the Rio da Serra and Alagoas local stages is carefully documented. The palynomorphs and the ostracode associations throughout the Jurassic?-Aptian/Albian sequence allow the interpretation of the paleoenvironmental evolution of the Araripe basin which otherwise confirms that a polycyclical sedimentation occurred in the basin, being one of the controlling factors on the distribution of ostracodes and palynomorphes. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Paleontology U5 - J;Article AV - English IS - 0016-6995 UR - ISI:000180281800004 L2 - ostracoda;palynomorphs;Lower Cretaceous;Araripe basin;biostratigraphy;northeastern Brazil SO - Geobios 2002 ;35(6):687-698 5142 UI - 10167 AU - Coleman KS AU - Sloan J AU - Hanson NA AU - Brown G AU - Clancy GP AU - Terrones M AU - Terrones H AU - Green MLH AD - Univ Oxford, Inorgan Chem Lab, Oxford OX1 3QR, EnglandUniv Oxford, Dept Mat, Oxford OX1 3PH, EnglandIPICyT, San Luis Potosi 78210, MexicoColeman, KS, Univ Oxford, Inorgan Chem Lab, S Parks Rd, Oxford OX1 3QR, England TI - The formation of ReS2 inorganic fullerene-like structures containing Re-4 parallelogram units and metal-metal bonds MH - United Kingdom MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000178317100010 L2 - M = MO; OPTICAL-ABSORPTION; CARBON NANOTUBES; NANOPARTICLES; MICROSCOPY; DISULFIDE; GROWTH SO - Journal of the American Chemical Society 2002 ;124(39):11580-11581 5143 UI - 9381 AU - Coley AA AU - Sarmiento A AU - Sussman RA AD - Dalhousie Univ, Dept Math & Stat, Halifax, NS B3H 3J5, CanadaUNAM, Inst Matemat, Unidad Cuernavaca, Chamilpa 62200, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoColey, AA, Dalhousie Univ, Dept Math & Stat, Halifax, NS B3H 3J5, Canada TI - Qualitative and numerical study of the matter-radiation interaction in Kantowski-Sachs cosmologies AB - We examine, from both a qualitative and a numerical point of view, the evolution of Kantowski-Sachs cosmological models whose source is a mixture of a gas of weakly interacting massive particles (WIMP's) and a radiative gas made up of a "tightly coupled" mixture of electrons, baryons and photons. Our analysis is valid from the end of nucleosynthesis up to the duration of radiative interactions (10(6) K>T>4x10(3) K). In this cosmic era annihilation processes are negligible, while the WIMP's only interact gravitationally with the radiative gas and the latter behaves as a single dissipative fluid that can be studied within a hydrodynamical framework. Applying the full transport equations of extended irreversible thermodynamics, coupled with the field and balance equations, we obtain a set of governing equations that becomes an autonomous system of ordinary differential equations once the shear viscosity relaxation time tau(rel) is specified. Assuming that tau(rel) is proportional to the Hubble time, the qualitative analysis indicates that models begin in the radiation-dominated epoch close to an isotropic equilibrium point (saddle). We show how the form of tau(rel) governs the relaxation time scale of the models towards an equilibrium photon entropy, leading to "near-Eckart" and transient regimes associated with "abrupt" and "smooth" relaxation processes, respectively. Assuming the WIMP particle to be a supersymmetric neutralino with a mass m(w)similar to100 GeV, the numerical analysis reveals that a physically plausible evolution, compatible with a stable equilibrium state and with observed bounds on CMB anisotropies and neutralino abundance, is only possible for models characterized by initial conditions associated with nearly zero spatial curvature and total initial energy density close to unity. An expression for the relaxation time, complying with physical requirements, is obtained in terms of the dynamical equations. It is also shown that the "truncated" transport equation does not give rise to acceptable physics MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000180317800029 L2 - RELATIVISTIC THERMODYNAMICS; MODELS; FLUIDS SO - Physical Review D 2002 ;66(12): 5144 UI - 11172 AU - Colin LSG AU - Sandoval-Villalbazo A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoEl Colegio Nacl, Mexico City 06020, DF, MexicoUniv Iberoamer, Dept Ciencias, Mexico City 01210, DF, MexicoUniv Portsmouth, Sch Comp Sci & Math, Relat & Cosmol Grp, Portsmouth PO1 2EG, Hants, EnglandColin, LSG, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Av Purisima & Michoacan S-N, Mexico City 09340, DF, Mexico TI - On the gravitational instability of a dissipative medium AB - This paper shows that the ordinary Jeans wave number can be obtained as a limiting case of a more general approach that includes dissipative effects. Corrections to the Jeans critical mass associated with viscosity are established. Some possible implications of the results are finally discussed MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000175433400012 SO - Classical and Quantum Gravity 2002 ;19(8):2171-2176 5145 UI - 9567 AU - Colin P AU - vila-Reese V AU - Valenzuela O AU - Firmani C AD - Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoNew Mexico State Univ, Dept Astron, Las Cruces, NM 88003, USAOsserv Astron Brera, I-23807 Merate, LC, ItalyColin, P, Univ Nacl Autonoma Mexico, Astron Inst, AP 70-264, Mexico City 04510, DF, Mexico TI - Structure and subhalo population of halos in a self-interacting dark matter cosmology AB - A series of high-resolution numerical simulations were performed to study the structure and substructure of Milky Way sized (MW-sized) and cluster-sized halos in a LambdaCDM cosmology with self-interacting (SI) dark matter particles. The cross section per unit of particle mass has the form sigma(DM) = sigma(0) (1 /nu(100))(alpha), where sigma(0) is a constant in units of cm(2) g(-1) and nu(100) is the relative velocity in units of 100 km s(-1). Different values for sigma(0) with alpha = 0 or 1 were used. For small values of sigma(DM) = const (less than or similar to0.5, alpha = 0), the core density of the halos at z = 0 is typically higher at a given mass for lower values of sigma(0) or, at a given sigma(0), for lower masses. For values of sigma(0) as high as 3.0, both cluster- and MW-sized halos may undergo the gravothermal catastrophe before z = 0. The core expansion occurs in a stable regime because the heat capacity C is positive in the center. After the maximum expansion, the isothermal core is hotter than the periphery and C < 0. Then the gravothermal catastrophe is triggered. The instability onset can be delayed by both the dynamical heating of the halo by major mergers and the interaction of cool particles with the hot environment of a host halo. When α = 1, the core density of cluster- and MW-sized halos is similar. Using σ(DM) = 0.5-1.0 (1/ν(100)), our predictions agree with the central densities and the core scaling laws of halos inferred from the observations of both dwarf and low surface brightness galaxies and clusters of galaxies. Regarding the cumulative ν(max) function of subhalos within MW-sized halos, when (σ(0), α) = (0.1, 0.0), (0.5, 0.0), or (0.5, 1.0) it agrees roughly with observations ( luminous satellites) for ν(max) &GSIM; 30 km s(-1), while at ν(max) = 20 km s(-1) the functions are already a factor of 5-8 higher, similar to the CDM predictions. For (σ(0), α) = (1.0, 1.0), this function lies above the corresponding CDM function. The structure and number of subhalos are affected by the scattering properties of the host halo rather than by those of the subhalos. The halos with SI have more specific angular momentum at a given mass shell and are rounder than their CDM counterparts. However, the angular momentum excess with regard to CDM is small. We conclude that the introduction of SI particles with σ(DM) &PROP; 1/ν(100) may remedy the cuspy core problem of the CDM cosmogony, at the same time keeping a subhalo population similar to that of the CDM halos MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179914300001 L2 - cosmology : theory;dark matter;galaxies : formation;galaxies : halos;methods : n-body simulations;SURFACE BRIGHTNESS GALAXIES; RESOLUTION ROTATION CURVES; ELLIPTIC GALAXIES; SPIRAL GALAXIES; DWARF GALAXIES; DISC GALAXIES; MASS; SIMULATIONS; EVOLUTION; CONSTRAINTS SO - Astrophysical Journal 2002 ;581(2):777-793 5146 UI - 9721 AU - Conan R AU - Avila R AU - Sanchez LJ AU - Ziad A AU - Martin F AU - Borgnino J AU - Harris O AU - Gonzalez SI AU - Michel R AU - Hiriart D AD - European So Observ, D-85748 Garching, GermanyUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nice Sophia Antipolis, CNRS, UMR 6525, F-06108 Nice 2, FranceUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoConan, R, European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany TI - Wavefront outer scale and seeing measurements at San Pedro Martir Observatory AB - The first measurements of the spatial coherence outer scale at the Observatorio Astronomico Nacional at San Pedro Martir (OAN-SPM) are reported along with long term seeing measurements. These parameters were measured with the Generalized Seeing Monitor and with a Differential Image Motion Monitor. An instrumented mast was also used to measure the structure constant of the refractive index C-n(2) in the first 15 m. Log-normal statistics were found for the seeing and for the outer scale, with median values of 0.92" and 27.0 m, respectively. The distribution of the outer scale values is similar to that found in other observatories around the world, suggesting that the presence of trees in the OAN-SPM do not affect the outer scale values. Correlation studies suggest that large values of the seeing and the outer scale are likely to occur when the wind blows from the SSW. Further studies are recommended to confirm this tendency MH - France MH - Germany MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000179574300038 L2 - atmospheric effects;turbulence;site testing;techniques : high angular resolution;instrumentation : adaptive optics;BAJA-CALIFORNIA; IMAGE MOTION; MONITOR SO - Astronomy & Astrophysics 2002 ;396(2):723-730 5147 UI - 7745 AU - Contreras-Balderas S AU - Edwards RJ AU - Lozano-Vilano MD AU - Garcia-Ramirez ME AD - Bioconservac AC, San Nicolas 66450, NL, MexicoUniv Texas Pan Amer, Dept Biol, Edinburg, TX, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, San Nicolas 66450, NL, MexicoContreras-Balderas, S, Bioconservac AC, AP 504, San Nicolas 66450, NL, Mexico TI - Fish biodiversity changes in the Lower Rio Grande/Rio Bravo, 1953-1996 - A review AB - Clearly defined changes in the fishes of the Lower Rio Grande/Rio Bravo, Texas and Mexico, have been documented since 1953. More recent surveys show that the original freshwater fish fauna has been retreating from the lower reaches and is being replaced by brackish and marine invaders. A total of 13 localities between Colombia (Nuevo Leon, Mexico) and the delta ( 580 km) were surveyed, with a total fish fauna of 142 species, which include native, exotic, and intruding species. Changes were analysed by locality. These changes show a loss of the majority of freshwater species, replacement of low to higher salinity forms. This shift is very clear in marine invaders, with some species penetrating the whole area investigated. Those changes are more noticeable in the lower-most localities, and diminish upstream. Data suggest that the changes in the basin, reflecting shifts in whole-basin ecology, include elevated temperature, salinity, turbidity, and lower runoff levels. There are indications of higher levels of pollution as well. Information obtained in this study is being incorporated in an Index of Biological Integrity to appear elsewhere MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0960-3166 UR - ISI:000184595600011 L2 - biodiversity changes;fish;Lower Rio Grande/Rio Bravo;Mexico/Texas;ICHTHYOFAUNA; MEXICO; TEXAS SO - Reviews in Fish Biology and Fisheries 2002 ;12(2):219-240 5148 UI - 9097 AU - Contreras-Barandiaran G AU - Paternain GP AD - CIMAT, Guanajuato 36000, MexicoUniv Cambridge, Cambridge CB3 0WB, EnglandContreras-Barandiaran, G, CIMAT, Guanajuato 36000, Mexico TI - Genericity of geodesic flows with positive topological entropy on S-2 AB - We show that the set of C-infinity Riemannian metrics on S-2 or RP2 whose geodesic flow has positive topological entropy is' open and dense in the C-2 topology. The proof is partially based on an analogue of Franks' lemma for geodesic flows on surfaces MH - United Kingdom MH - Mexico|Guanajuato PB - BETHLEHEM: LEHIGH UNIV RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0022-040X UR - ISI:000181205800001 L2 - CLOSED GEODESICS; CONSERVATIVE SYSTEMS; HYPERBOLIC FLOWS; MANIFOLDS; CURVATURE; DYNAMICS; ORBITS; POINTS SO - Journal of Differential Geometry 2002 ;61(1):1-49 5149 UI - 10655 AU - Contreras-Sanchez WM AU - Fitzpatrick MS AU - ALonso M AU - Schreck CB AU - Leong JAC AD - Oregon State Univ, Dept Fisheries & Wildlife, Biol Resources Div, USGS,Oregon Cooperat Fish & Wildlife Res Unit, Corvallis, OR 97331, USAOregon State Univ, Dept Microbiol, Corvallis, OR 97331, USADept Environm Qual, Portland, OR, USAUniv Juarez Autonoma Tabasco, Lab Acuacultura, Villahermosa, Mexico TI - Identification of unique genes expressed during sex inversion of nile tilapia, Oreochromis niloticus, by cDNA subtractive hybridization MH - Mexico|Tabasco MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000176561900212 SO - Biology of Reproduction 2002 ;66():159-160 5150 UI - 11024 AU - Contreras AP AU - Tlenkopatchev MA AU - Lopez-Gonzalez MD AU - Riande E AD - CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoRiande, E, CSIC, Inst Ciencia & Tecnol Polimeros, Juan Cierva 3, E-28006 Madrid, Spain TI - Synthesis and gas transport properties of new high glass transition temperature ring-opened polynorbornenes AB - The synthesis and polymerization of the new monomers N-(1-adamantyl)-exo-norbornene-5,6-dicarboximide (AdNDI), N-cyclohexyl-exo-norbornene-5,6-dicarboximide (ChNDI), and N-phenyl-exonorbornene-5,6-dicarboximide (PhNDI) are reported. Copolymers of IV-(1-adamantyl)-exo-norbornene-5,6-dicarboximide/norbornene, with molar compositions 50/50, 70/30, and 30/70, were also obtained. The transport of hydrogen, oxygen, nitrogen, carbon monoxide, carbon dioxide, methane, ethylene, and ethane across membranes prepared from these homopolymers and copolymers was determined at 30 degreesC using permeation techniques. Diffusion coefficients correlate rather well with the diameter of diffusant molecules except in the case of carbon dioxide. The values of the permselectivity coefficient for different gases depend on the type of membranes. For example, the permselectivity of oxygen with respect to nitrogen, alpha(O-2/N-2), is ca. 5.50 for membranes prepared from N-(1-adamantyl)-exo-norbornene-5,6-dicarboximide/norbornene (50/50) copolymers, which compares favorably with the values reported for this parameter in membranes with imide groups located in the backbone. The values of alpha(H-2/C2H6) in membranes of poly(N-(1-adamantyl)-exo-norbornene-5,6-dicarboximide), poly(N-cyclohexyl-exo-norbornene-5,6-dicarboximide), and poly(N-phenyl-exo-norbornene-5,6-dicarboximide) are 183, 124, and 122, respectively, whereas the values of alpha(C2H4/C2H6) amount to 6.9, 7.6, and 6.4, respectively. For most membranes used in this study, diffusion rather than solubility is responsible for the discrimination of gas transport. However, solubility is mainly responsible for the high permselectivity of ethylene with respect to ethane displayed by the membranes MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000175937400021 L2 - METATHESIS POLYMERIZATION; POLYCARBONATE MEMBRANES; CONTAINING NORBORNENE; SORPTION PROPERTIES; FREE-VOLUME; PERMEATION; POLYMERS; SIMULATION; ARGON; PERMEABILITY SO - Macromolecules 2002 ;35(12):4677-4684 5151 UI - 11377 AU - Contreras AP AU - Tlenkopatchev MA AU - Ogawa T AU - Nakagawa T AD - Natl Autonomous Univ Mexico, Inst Invest Mat, CU, Mexico City 04510, DF, MexicoMeiji Univ, Dept Ind Chem, Kawasaki, Kanagawa 2140033, JapanTlenkopatchev, MA, Natl Autonomous Univ Mexico, Inst Invest Mat, CU, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Synthesis and oxygen permeability of polynorbornene with tosylate side chain group AB - A new oxygen/nitrogen separation membrane based on a polynorbornene with tosylate side chain group was synthesized using well-defined vinylidene ruthenium catalysts. The permeability, separation factor, diffusion and solubility coefficients of a polynorbornene membrane were studied. The introduction of tosylate group into the five-membered ring of the polynorbornene main chain results in increase of T-g and significant improvement in selectivity for O-2/N-2 MH - Japan MH - Mexico|Distrito Federal PB - TOKYO: SOC POLYMER SCIENCE JAPAN RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3896 UR - ISI:000174960700001 L2 - norbornene with tosylate substituent;metathesis polymerization;ruthenium catalysts;polynorbornene with tosylate side chain group oxygen permeability;OPENING METATHESIS POLYMERIZATION; SORPTION PROPERTIES; NORBORNENE; TRANSPORT; POLYMERS SO - Polymer Journal 2002 ;34(2):49-53 5152 UI - 10958 AU - Contreras G AU - Paternain GP AD - CIMAT, Guanajuato 3600, MexicoFac Ciencias, Ctr Matemat, Montevideo 11400, UruguayPaternain, GP, CIMAT, AP 402, Guanajuato 3600, Mexico TI - Connecting orbits between static classes for generic Lagrangian systems AB - Let L be a C-alpha convex superlinear Lagrangian on a closed manifold M. We show that if the number of static classes is finite, then there exist chains of semistatic orbits that connect any two given static classes. Using this property we show that if there is only one static class, then the homoclinic orbits to the set of static orbits generate over R the relative homology of the pair (M, U). where U is a sufficiently small connected neighborhood of the set of static orbits in M. We show that generically in the sense of Mane (in: F. Ledrappier, J. Lewowicz, S. Newhouse (Eds.), International Congress on Dynamical Systems in Montevideo (a tribute to Ricardo Mane), Pitman Research Notes in Mathematics, Vol. 362, 1996 pp. 120-131 (reprinted in Bol. Soc. Bras. Mat. 28(2) (1997) 141-157) the set of semistatic orbits coincides with the support of a uniquely minimizing measure, therefore generically, the homoclinic orbits to the support of the minimizing measure generate over R the relative homology of the pair (M, U), where U is a sufficiently small connected neighborhood of the projection of the support of the measure to M. This last result was obtained-with a different proof-by Bolotin (Proceedings of the International Congress of Mathematics, Vol. 1,2, Zurich, 1994, Birkhauser, Basel, 1995, pp. 1169-1178: in: V.V. Kozlov (Ed.). Dynamical Systems in Classical Mechanics, American Mathematical Society Translation Series 2, Vol. 168, American Mathematical Society, Providence, RI, 1995, pp. 21-90) assuming the existence of a C1+Lip function f: M --> R such that L + c - df greater than or equal to 0, where c is the critical value of L. Finally, we obtain two consequences. The first one says that if M is a closed manifold with first Betti number greater than or equal to, 2 then there exists a generic set O subset of C-alpha (M, R) such that if psi is an element of O the Lagrangian L + psi has a unique minimizing measure and this measure is uniquely ergodic. When this measure is supported on a periodic orbit, this orbit is hyperbolic and the stable and unstable manifolds have transverse homoclinic intersections. The second consequence says that if M is a closed manifold with first Betti number different from zero and if L is a symmetric Lagrangian, then there exists a generic set O subset of C-infinity (M, R) such that if psi is an element of O, then L + psi has a unique minimizing measure and this measure is supported on a hyperbolic fixed point whose stable and unstable manifolds have transverse homoclinic intersections. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Guanajuato MH - Uruguay PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0040-9383 UR - ISI:000175989500001 SO - Topology 2002 ;41(4):645-666 5153 UI - 10407 AU - Contreras ME AU - Sicilia-Aguilar A AU - Muzerolle J AU - Calvet N AU - Berlind P AU - Hartmann L AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Arizona, Steward Observ, Tucson, AZ 85721, USAContreras, ME, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - A study of intermediate-mass stars in Trumpler 37 AB - We present results from optical spectra for intermediate-mass stars in the young cluster Trumpler 37. The spectroscopy presented helps to re ne the membership, reddening ( A(V) similar to 1.5 +/- 0.5), and distance modulus [ (m-M) = 9. 7 +/- 0.2] to this cluster. Only three new emission-line stars were found in our sample, resulting in a total of four stars in the cluster with emission lines and spectral type earlier than G. One of these emission-line stars, LkHalpha 349, is probably not a member of the central cluster, since it lies within a dark globule on the periphery of the H II region IC 1396. Thus, at an age of about 3 Myr, as estimated from the expansion age of molecular material around the cluster, emission-line phenomena possibly driven by disk accretion are extremely rare through spectral types F (masses not greater than or equal to 1.5 M-circle dot) MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000177589300022 L2 - circumstellar matter;color-magnitude diagrams;stars : early-type;stars : emission-line, Be;ALPHA EMISSION STARS; CIRCUMSTELLAR DISKS; PROTOSTELLAR DISKS; CLUSTER TRUMPLER-37; DUST PROPERTIES; AE/BE STARS; AE STARS; PHOTOEVAPORATION; SYSTEMS; RESOLUTION SO - Astronomical Journal 2002 ;124(3):1585-1592 5154 UI - 9643 AU - Contreras O AU - Ponce FA AU - Christen J AU - Dadgar A AU - Krost A AD - Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAUniv Magdeburg, Inst Expt Phys, Fak Nat Wissensch, D-39016 Magdeburg, GermanyContreras, O, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, Mexico TI - Dislocation annihilation by silicon delta-doping in GaN epitaxy on Si AB - The addition of bursts of silicon has been observed to correlate with the reduction of threading screw dislocations during epitaxial growth of GaN on silicon by metalorganic chemical vapor deposition. The reduction is associated with bending of screw dislocations and "pairing" with equivalent neighboring dislocations with opposite Burgers vectors. This results in the formation of square dislocation loops. When the right type of dislocation is not available, the dislocation continues propagating in the original direction, leaving behind a kink at the silicon-rich position. These observations apply only to dislocations with a screw component. Edge dislocations are not affected by silicon delta-doping. A mechanism for the termination of threading screw dislocation is proposed, which involves pinning by the silicon impurities of the surface lattice steps associated with screw dislocations. (C) 2002 American Institute of Physics MH - Germany MH - Mexico|Baja California MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 26 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000179731000010 L2 - VAPOR-PHASE EPITAXY; GROWTH SO - Applied Physics Letters 2002 ;81(25):4712-4714 5155 UI - 10364 AU - Contreras O AU - Srinivasan S AU - Ponce FA AU - Hirata GA AU - Ramos F AU - McKittrick J AD - Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoUniv Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093, USAContreras, O, Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA TI - Microstructural properties of Eu-doped GaN luminescent powders AB - GaN powders doped with europium have been prepared using Eu and Ga nitrates and N2H4 as reactants. The resulting particles have dimensions ranging from 0.5 to 1.0 mum. The crystalline structure was studied by transmission electron microscopy, and it consisted of single crystals with a hexagonal (wurtzite) structure containing small cubic domains (zinc blende) and a high density of stacking faults, all aligned along the [0001] and <111> directions, respectively. Cathodoluminescence measurements show strong light emission in the red region. This luminescence corresponds to transitions of Eu with the strongest emission in the 611 nm line, which is associated to the Eu3+ 4f transition from D-5(0) to F-7(2). These results demonstrate the feasibility of GaN:RE powders for luminescent applications. (C) 2002 American Institute of Physics MH - Mexico|Baja California MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 17 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000177864400020 L2 - ELECTROLUMINESCENCE; EMISSION; BLUE SO - Applied Physics Letters 2002 ;81(11):1993-1995 5156 UI - 9228 AU - Cooper J AU - Gimpelson R AU - Laberge P AU - Galen D AU - Garza-Leal JG AU - Scott J AU - Leyland N AU - Martyn P AU - Liu J AD - Univ Arizona, Sch Med, Dept Obstet & Gynecol, Phoenix, AZ, USASt Louis Sch Med, Dept Obstet & Gynecol, St Louis, MO, USACHUQ, St Foy, PQ, CanadaUniv Calif Davis, Dept Obstet & Gynecol, San Ramon, CA, USAUniv Hosp Dr Jose E Gonzalez, Dept Obstet & Gynecol, Monterrey, MexicoUniv Alberta, Dept Obstet & Gynecol, Div Reprod Endocrinol, Edmonton, AB T6G 2M7, CanadaMt Sinai Hosp, Toronto, ON M5G 1X5, CanadaUniv Hlth Network, Toronto, ON, CanadaCalgary Hlth Reg, Dept Obstet & Gynecol, Calgary, AB, CanadaUniv Hosp Cleveland, Cleveland, OH 44106, USACooper, J, Ob Gyn Consultants, 6036 N 19th Ave,Suite 401, Phoenix, AZ 85015 USA TI - A randomized, multicenter trial of safety and efficacy of the NovaSure system in the treatment of menorrhagia AB - Study Objective. To compare the safety and effectiveness of the NovaSure impedance-controlled endometrial ablation system with hysteroscopic wire loop resection plus rollerball ablation for treatment of excessive uterine bleeding in premenopausal women. Design. Randomized, multicenter, double-arm study (Canadian Task Force classification 1). Setting. Nine academic medical centers and private offices. Patients. Two hundred sixty-five premenopausal women with symptomatic menorrhagia. Intervention. Ablation performed with the NovaSure system or wire loop resection and rollerball. Measurements and Main Results. Success [pictorial blood loss-assessment chart (PBLAC) score 5751 was achieved in 88.3% of NovaSure-treated and 81.7% of rollerball-treated patients. One year after treatment 90.9% and 87.8%, respectively, reported normal bleeding or less (PBLAC less than or equal to 100) and 41% and 35%, respectively, experienced amenorrhea (PBLAC = 0). Mean procedure time was 4.2 minutes (average 84 sec) in the NovaSure group and 24.2 minutes in the rollerball group. Local and/or intravenous sedation was administered in 73% of NovaSure patients and 18% of rollerball patients. Intraoperative adverse events occurred less frequently with NovaSure (0.6%) than with rollerball (6.7%). Postoperative adverse events occurred in 13% and 25.3% of patients, respectively. Conclusion. The NovaSure system was safe and effective in treatment of women with menorrhagia. The procedure is both quick and effective, and eliminates the expense and side effects of endometrial pretreatment MH - USA MH - Canada MH - Mexico|Nuevo Leon PB - SANTA FE SPRINGS: JOURNAL AMER ASSOC GYNECOLOGIC LAPAROSCOPISTS RP - NOT IN FILE U3 - TC 40 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 1074-3804 UR - ISI:000180942600005 L2 - ENDOMETRIAL ABLATION; OPERATIVE HYSTEROSCOPY; ABDOMINAL HYSTERECTOMY; RESECTION; COMPLICATIONS; OUTCOMES SO - Journal of the American Association of Gynecologic Laparoscopists 2002 ;9(4):418-428 5157 UI - 11030 AU - Corbacho AM AU - de las Escalera GM AU - Clapp C AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76220, MexicoUniv Calif Davis, Dept Internal Med, Div Pulm & Crit Care Med, Davis, CA 95616, USACorbacho, AM, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76220, Mexico TI - Roles of prolactin and related members of the prolactin/growth hormone/placental lactogen family in angiogenesis AB - Prolactin, growth hormone and placental lactogen are members of a family of polypeptide hormones which share structural similarities and biological activities. Numerous functions have been attributed to these hormones, among which stand out their recently discovered effects on angiogenesis, the process by which new blood vessel, are formed from the pre-existing microvasculature. Prolactin, growth hormone and placental lactogen, along with two non-classical members of the family proliferin and proliferin-related protein, can act both as circulating hormones and as paracrine/autocrine factors to either stimulate or inhibit various stages of the formation and remodeling of new blood vessels, including endothelial cell proliferation, migration, protease production and apoptosis. Such opposing actions can reside in similar but independent molecules, as is the case of proliferin and proliferin-related protein, which stimulate and inhibit angiogenesis respectively. The potential to exert opposing effects on angiogenesis can also reside within the same molecule as the parent protein can promote angiogenesis (i.e. prolactin. growth hormone and placental lactogen), but after proteolytic processing the resulting peptide fragment acquires anti-angiogenic properties (i.e, 16 kDa prolactin, 16 kDa growth hormone and 16 kDa placental lactogen). The unique properties of the peptide fragments versus the full-length molecules, the regulation of the protease responsible for specific protein cleavage, the selective expression of specific receptor and their associated signal transduction pathways are issues that are being investigated to further establish the precise contribution of these hormones to angiogenesis under both physiological and pathological situations. In this review article, we summarize the known and speculative issues underlying the effects of the prolactin, growth hormone and placental lactogen family of proteins on angiogenesis, and address important remaining enigmas in this field of research MH - Mexico|Queretaro MH - USA PB - BRISTOL: SOC ENDOCRINOLOGY RP - NOT IN FILE U3 - TC 72 U4 - Endocrinology & Metabolism U5 - J;Review AV - English IS - 0022-0795 UR - ISI:000175904400002 L2 - GROWTH-FACTOR-I; CAPILLARY ENDOTHELIAL-CELLS; PROLIFERIN-RELATED PROTEIN; HEMATOPOIETIN RECEPTOR SUPERFAMILY; REGULATED PROTEIN/PROLIFERIN GENE; MIMICKING DIABETIC-RETINOPATHY; N-TERMINAL FRAGMENT; BREAST-CANCER-CELLS; TUMOR-GROWTH; CATHEPSIN-D SO - Journal of Endocrinology 2002 ;173(2):219-238 5158 UI - 9871 AU - Corchi A AU - Cortez J AU - Quevedo H AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Mississippi, Dept Phys & Astron, University, MS 38677, USACorchi, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - On unitary time evolution in gowdy T-3 cosmologies AB - A non-perturbative canonical quantization of the Gowdy T-3 polarized models is considered here. This approach profits from the equivalence between the symmetry reduced model and 2 + 1 gravity coupled to a massless real scalar field. The system is partially gauge fixed and a choice of internal time is made, for which the true degrees of freedom of the model reduce to a massless free scalar field propagating on a two-dimensional expanding torus. It is shown that the symplectic transformation that determines the classical dynamics cannot be unitarily implemented on the corresponding Hilbert spare of quantum states. The implications of this result for both the quantization of fields on curved manifolds and other physically relevant questions regarding the initial singularity axe discussed MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000179176900010 L2 - QUANTUM-GRAVITY; QUANTIZATION; OPERATOR; FIELDS; MODEL SO - International Journal of Modern Physics D 2002 ;11(9):1451-1468 5159 UI - 11321 AU - Cordero-Cid A AU - Martin X AU - Peter P AD - BUAP, Inst Fis, Puebla 72570, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoInst Astrophys, CNRS, UPR 341, F-75014 Paris, FranceCordero-Cid, A, BUAP, Inst Fis, AP J-48, Puebla 72570, Mexico TI - Current-carrying cosmic string loop 3D simulation: Towards a reduction of the vorton excess problem AB - The dynamical evolution of superconducting cosmic string loops with specific equations of state describing timelike and spacelike currents is studied numerically. This analysis extends previous work in two directions: first it shows results coming from a fully three-dimensional simulation (as opposed to the two-dimensional case already studied), and it now includes fermionic as well as bosonic currents. We confirm that in the case of bosonic currents, shocks are formed in the magnetic regime and kinks in the electric regime. For a loop endowed with a fermionic current with zero-mode carriers, we show that only kinks form along the string worldsheet, therefore making these loops slightly more stable against charge carrier radiation, the likely outcome of either shocks or kinks. All these combined effects tend to reduce the number density of stable loops and contribute to ease the vorton excess problem. As a bonus, these effects also may provide new ways of producing high energy cosmic rays MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000175146900036 L2 - RAY ENERGY-SPECTRUM; PARTICLE PHYSICS; EQUATION; STATE; MONOPOLES; CUTOFF; CONSTRAINTS; INSTABILITY; CONJECTURE; EVOLUTION SO - Physical Review D 2002 ;65(8): 5160 UI - 11254 AU - Cordero G AU - Garcia MG AU - Guzman LA AU - Salinas V AU - Fernandez LA AU - Christensen RD AD - Natl Inst Perinatol, Mexico City, DF, MexicoUniv S Florida, All Childrens Hosp, St Petersburg, FL 33701, USA TI - Intravenous immune globulin therapy for hyperbilirubinemia caused by Rh hemolytic disease: A meta-analysis MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714601994 SO - Pediatric Research 2002 ;51(4):344A-344A 5161 UI - 11320 AU - Cordero R AU - Vilenkin A AD - Tufts Univ, Dept Phys & Astron, Inst Cosmol, Medford, MA 02155, USAIPN, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoCordero, R, Tufts Univ, Dept Phys & Astron, Inst Cosmol, Medford, MA 02155 USA TI - Stealth branes AB - We discuss the brane world model of Dvali, Gabadadze and Porrati in which branes evolve in an infinite bulk and the brane curvature term is added to the action. If Z(2) symmetry between the two sides of the brane is not imposed, we show that the model admits the existence of "stealth branes" which follow the standard 4D internal evolution and have no gravitational effect on the bulk space. Stealth branes can nucleate spontaneously in the bulk spacetime. This process is described by the standard 4D quantum cosmology formalism with tunneling boundary conditions for the brane world wave function. The notorious ambiguity in the choice of boundary conditions is fixed in this case due to the presence of the embedding spacetime. We also point to some problematic aspects of models admitting stealth brane solutions MH - USA MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000175146900033 L2 - QUANTUM CREATION; WORLD COSMOLOGY; WAVE-FUNCTION; UNIVERSE; DIMENSIONS; GRAVITY; MILLIMETER; HIERARCHY; SYMMETRY SO - Physical Review D 2002 ;65(8): 5162 UI - 11802 AU - Cordero R AU - Rojas E AD - IPN, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoSyracuse Univ, Dept Phys, Syracuse, NY 13244, USAInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoCordero, R, IPN, Escuela Super Fis & Matemat, Dept Fis, Edificio 9, Mexico City 07738, DF, Mexico TI - Chiral superconducting membranes AB - We develop the dynamics of the chiral superconducting membranes (with null current) in an alternative geometrical approach either making a Lagrangian description and a Hamiltonian point of view. Besides this, we show the equivalence of the resulting descriptions to the one known Dirac-Nambu-Coto (DNG) case. Integrability for chiral string model is obtained using a proposed light-cone gauge. In a similar way, domain walls are integrated by means of a simple ansatz. We compare the results with recent works that appeared in the literature MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000173766900004 L2 - EXTENDED OBJECTS; COSMIC STRINGS; MODEL; DEFORMATIONS; DIMENSIONS; HIERARCHY; GEOMETRY; DYNAMICS; EDGES; SPACE SO - International Journal of Modern Physics A 2002 ;17(1):73-87 5163 UI - 10137 AU - Cordero S AU - Rojas F AU - Komhauser I AU - Dominguez A AU - Vidales AM AU - Lopez R AU - Zgrablich G AU - Riccardo JL AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, CONICET, Dept Fis, RA-5700 San Luis Obispo, ArgentinaRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Pore-blocking and pore-assisting factors during capillary condensation and evaporation AB - Thirty-four years ago Everett [The Solid-Gas Interface, Vol. 2, Marcel Dekker, New York, 1967, p. 1055] proposed a pore-blocking factor when establishing the foundations of a non-independent domain theory (IDT) of sorption hysteresis. Such pore-blocking factor was defined as the ratio between two desorbed volumes within the same pressure range. The first volume arose from a non-independent pore structure. The second quantity was a virtual one since it represented the volume desorbed if the pores of the substrate had acted as independent domains. In fact, Everett calculated the ratio between pore-blocking factors, while not their absolute values, from experimental data proceeding from sorption results on porous glasses. The astonishing conclusion of all this preliminary work, was that blocking factors depended upon the total amount of condensate at a certain stage of a desorption process rather than on the distribution of it within the porous network. In this way, a unique pore-blocking factor curve ensued from different sorption processes such as boundary and scanning curves. Now, through the aid of simulated heterogeneous 3-D porous networks and the sorption curves thereon developed, an assessment of the above mentioned important assertion has been undertaken. Besides, a pore-assisting factor that may arise during an ascending sorption process has been treated under a similar context. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000178418400024 L2 - pore blocking;assisted capillary condensation;delayed adsorption;heterogeneous porous networks;SIMULATION; NETWORKS; MODEL SO - Applied Surface Science 2002 ;196(1-4):224-238 5164 UI - 8998 AU - Cordova-Tellez L AU - Burris JS AD - Burris Consulting, Ames, IA 50010, USAIREGEP, Colegio Postgraduados, Mexico City 56230, DF, MexicoBurris, JS, Burris Consulting, 1707 Burnett Ave, Ames, IA 50010, USA TI - Alignment of lipid bodies along the plasma membrane during the acquisition of desiccation tolerance in maize seed AB - The impairment of lipid body alignment along the plasma membrane during artificial drying of maize (Zea mays L.) seed has been associated with decreases in germination and vigor. In this study, we question further its potential functions as well as the alignment mechanisms. Ears of hybrid maize [B73 x (H99 x H95)] were harvested at about. 550, 500, 400, and 320 g H2O kg(-1) fresh weight (fw) and subjected to preconditioning (PC) (ear drying at 35degreesC and 0.47 to s(-1) airflow rate) for 0, 12, 24, 36, and 48 h before fast drying (shelled seed, 35degreesC and 5.10 m s(-1) airflow rate) treatments to decrease seed moisture content (MC) to about 130 g H2O kg(-1) fw. In a cross section of the embryo radicle, alignment of lipid bodies (LB) occurred first in the root cap, followed by outer quiescent center (QC) cells and inner QC cells. This alignment pattern was observed during PC and under field drying conditions. Cell plasmolysis and aberrations of the LB were evident in seed harvested at MC > 400 g H2O kg(-1) fw and subjected to fast drying without PC. Lipid body aberrations decreased in severity with PC, seed development, and field drying. The alignment of LB coincided with changes in embryo-drying rates. Decreases in lipid body aberrations coincided with decreases in cell solute leakage and shoot/root ratio and increases in germination percentage. We conclude that alignment of LB along the plasma membrane is a progressive process that occurs from the periphery to the inner QC cells of the embryo radicle. Alignment of LB along the plasma membrane may change cell water relations leading to a more organized dehydration during seed drying. High embryo drying rates may prevent alignment of LB along the plasma membrane and are associated with low germination and vigor MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430200029 L2 - OIL-BODIES; STORAGE PROTEINS; OLEOSINS; EMBRYOS SO - Crop Science 2002 ;42(6):1982-1988 5165 UI - 8999 AU - Cordova-Tellez L AU - Burris JS AD - IREGEP, Colegio Postgraduados, Mexico City, DF, MexicoBurris Consulting, Ames, IA 50010, USABurris, JS, Burris Consulting, 1701 Burnett Ave, Ames, IA 50010, USA TI - Embryo drying rates during the acquisition of desiccation tolerance in maize seed AB - Maize (Zea mays L.) seed quality is often reduced because of drying injury, although the causes and impairment mechanisms are poorly understood. In this study, we investigated changes in embryo drying rates and their effect on the acquisition of desiccation tolerance in maize seed. Ears of hybrid maize [B73 x (H99 x H95)] were harvested at about 550, 500, 400, and 320 g H2O kg(-1) fresh weight (fw) and subjected to preconditioning (PC) (ear drying at 35degreesC and 0.47 m s(-1) airflow rate) for 0, 12, 24, 36, and 48 h before fluidized bed (FB) drying (shelled seed, 35degreesC and 5.10 m s(-1) airflow rate) treatments to decrease moisture content (MC) to about 130 g H2O kg(-1) fw. Additionally, ears were entirely dried under PC (35C) and unheated-air (NH) conditions. At the four harvests, different drying rate phases were evident in embryos of seed dried entirely at PC (35degreesC) conditions. A slower drying phase coincided with the PC period, which increased with increasing maturation. Under FB drying, embryo MC declined at a faster rate down to about 400 g H2O kg(-1) fw, followed by an intermediate drying rate down to about 200 g H2O kg(-1) fw, and a slower drying rate below this point. As embryo MC declined to 400 g H2O kg(-1) fw at slower drying rates, either with PC or field drying, the ability to withstand the faster drying rates of the FB progressively increased. This effect was illustrated by lower cell solute leakage and better performance in germination and vigor tests. We conclude that slow embryo drying rates to threshold levels may be crucial to acquire their ability to withstand higher drying rates without detrimental effect on seed germination and vigor MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430200030 L2 - CORN SEED; QUALITY SO - Crop Science 2002 ;42(6):1989-1995 5166 UI - 11010 AU - Cordova A AU - Perez-Gutierrez JF AU - Lleo B AU - Garcia-Artiga C AU - Alvarez A AU - Drobchak V AU - Martin-Rillo S AD - Univ Complutense, Fac Vet, Dept Patol Anim Reprod 2, E-28040 Madrid, SpainUniv Autonoma Metropolitana, Dept Prod Agr & Anim, Xochimilco, MexicoUniv Complutense Madrid, Ctr Citometria Flujo & Microscopia Confocal, Madrid, SpainPerez-Gutierrez, JF, Univ Complutense, Fac Vet, Dept Patol Anim Reprod 2, Avda Puerta de Hierro S-N, E-28040 Madrid, Spain TI - In vitro fertilizing capacity and chromatin condensation of deep frozen boar semen packaged in 0.5 and 5 ml straws AB - The effect of the straw volume employed for semen freezing was studied in 14 ejaculates from seven boars, by evaluating the viability, IVF capacity and chromatin state of spermatozoa. Frozen-thawed semen from 0.5 and 5 ml straws was compared to fresh semen. The chromatin condensation degree was determined by flow cytometry, using propidium iodide as fluorochrome, and the chromatin stability was evaluated by inducing its decondensation with SIDS and EDTA. The results obtained for IVF, motility and normal apical ridge (NAR) were: 91.64, 78.14 and 81.47% sperm penetration, 80.78, 68.38 and 70.83% monospermy, 10.86, 9.76 and 10.64% polyspermy, 87.14, 50.71 and 47.86% motility, 79.14, 56.14 and 53.36% NAR, for fresh semen, thawed semen in 0.5 and 5 ml straws, respectively. Frozen-thawed spermatozoa showed significantly increased (P < 0.05) chromatin compactness compared to fresh spermatozoa (55.42, 48.41 and 47.08 fluorescence units (MIFU), for fresh semen, thawed semen in 0.5 and 5 ml straws, respectively). Chromatin was significantly more unstable (P < 0.05) in spermatozoa frozen in 0.5 ml straws (174.7 MIFU) compared to those frozen in 5 ml straws (155.53 MIFU) or to those in fresh semen (149.74 MIFU). (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 12 U4 - Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0093-691X UR - ISI:000175988400014 L2 - sperm chromatin;in vitro fertilization;cryopreservation;porcine;HUMAN-SPERM CHROMATIN; HUMAN-SPERMATOZOA; NUCLEAR-STABILITY; ARTIFICIAL-INSEMINATION; INVITRO FERTILIZATION; PRONUCLEUS FORMATION; MAXI-STRAWS; DECONDENSATION; CRYOPRESERVATION; INFERTILITY SO - Theriogenology 2002 ;57(8):2119-2128 5167 UI - 11280 AU - Cordova AI AU - Hernandez-Saavedra NY AU - De Philippis R AU - Ascencio F AD - Ctr Biol Res, Marine Pathol Unit, La Paz 23000, Baja California, MexicoUniv Studi Firenze, Dipartimento Biotecnol Agrarie, I-50144 Florence, ItalyAscencio, F, Ctr Biol Res, Marine Pathol Unit, La Paz 23000, Baja California, Mexico TI - Generation of superoxide anion and SOD activity in haemocytes and muscle of American white shrimp (Litopenaeus vannamei) as a response to beta-glucan and sulphated polysaccharide AB - Juvenile American white shrimp (Litopenaeus vannamei) were immersed in aerated beta-glucan and sulphated polysaccharide solutions for 1, 3 and 6 h. Superoxide anion and SOD activity in haemocytes and muscle were investigated to evaluate whether beta-glucan and sulphated polysaccharide induce any immunostimulatory activity. Haemocytes and muscle showed different levels of superoxide anion generation and SOD activity (2(.)0 and 1(.)4 times that of control, respectively) when shrimp were immersed for 6 h in aerated sea water containing beta-glucan and sulphated polysaccharide. Total haemocyte count (THC) decreased within the first 24 h after challenge with immunostimulants, but THC and total soluble haemocyte protein increased over normal values after 48-120 h. Single immunostimulation with beta-glucan and sulphated polysaccharide is capable of generating an increase in the respiratory burst of L. vannamei haemocytes. (C) 2002 Elsevier Science Ltd MH - Italy MH - Mexico|Baja California PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Immunology;Marine & Freshwater Biology;Veterinary Sciences U5 - J;Article AV - English IS - 1050-4648 UR - ISI:000175248700004 L2 - Litopenaeus vannamei;American white shrimp;reactive oxygen;species;SOD;immunostimulants;sulphated polysaccharides;beta-glucan;PENAEUS-MONODON FABRICIUS; VIBRIOSIS RESISTANCE; DEFENSE-MECHANISMS; DISMUTASE ACTIVITY; CARCINUS-MAENAS; KURUMA SHRIMP; TIGER PRAWN; HEMOLYMPH; PROPHENOLOXIDASE; HEMOCYTES SO - Fish & Shellfish Immunology 2002 ;12(4):353-366 5168 UI - 9842 AU - Corichi A AU - Cortez J AU - Quevedo H AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Mississippi, Dept Phys & Astron, University, MS 38677, USAPerimeter Inst Theoret Phys, Waterloo, ON N2J 2W9, CanadaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCorichi, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Schrodinger representation for a scalar field on curved spacetime AB - It is generally known that linear (free) field theories are one of the few quantum field theories that are exactly soluble. In the Schrodinger functional description of a scalar field on flat Minkowski spacetime and for flat embeddings, it is known that the usual Fock representation is described by a Gaussian measure. In this paper, arbitrary globally hyperbolic spacetimes and embeddings of the Cauchy surface are considered. The classical structures relevant for quantization are used for constructing the Schrodinger representation in the general case. It is shown that, in this case, the measure is also Gaussian. Possible implications for the program of canonical quantization of midisuperspace models are pointed out MH - Canada MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000179081500077 L2 - QUANTUM-GRAVITY; VACUUM STATES; QUANTIZATION; EVOLUTION SO - Physical Review D 2002 ;66(8): 5169 UI - 10482 AU - Corichi A AU - Sudarsky D AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Mississippi, Dept Phys & Astron, University, MS 38677, USACorichi, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - When is S = A/4? AB - Black hole entropy and its relation to the horizon area are considered. More precisely, the conditions and specifications that are expected to be required for the assignment of entropy, and the consequences that these expectations have when applied to a black hole are explored. In particular, the following questions are addressed: When do we expect to assign an entropy?; when are entropy and area proportional? and, what is the nature of the horizon? It is concluded that our present understanding of black hole entropy is somewhat incomplete, and some of the relevant issues that should be addressed in pursuing these questions are pointed out MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000177365100003 L2 - black holes;entropy;quantum gravity;BLACK-HOLE ENTROPY; PARTICLE CREATION; BOLTZMANN ENTROPY; ISOLATED HORIZONS; TIMES ARROW; LAWS; MECHANICS; DYNAMICS; THERMODYNAMICS SO - Modern Physics Letters A 2002 ;17(22):1431-1443 5170 UI - 11066 AU - Corichi A AU - Ryan MP AU - Sudarsky D AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Mississippi, Dept Phys & Astron, University, MS 38677, USAUniv Maryland, Dept Phys, College Pk, MD 20742, USACorichi, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - Quantum geometry as a relational construct AB - The problem of constructing a quantum theory of gravity is considered from a novel viewpoint. It is argued that any consistent theory of gravity should incorporate a relational character between the matter constituents of the theory. In particular, the traditional approach of quantizing a space-time metric is criticized and two possible avenues for constructing a satisfactory theory are put forward MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000175727600005 L2 - quantum gravity;observables;quantum geometry;relational quantum theory;SPIN FOAM MODELS; EQUIVALENCE PRINCIPLE; GRAVITY; MECHANICS; SPACETIME; ENTROPY; LIMITS; LIGHT SO - Modern Physics Letters A 2002 ;17(9):555-567 5171 UI - 11550 AU - Corichi A AU - Cruz-Pacheco G AU - Minzoni A AU - Padilla P AU - Rosenbaum M AU - Ryan MP AU - Smyth NF AU - Vukasinac T AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, FENOMEC, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, IIMAS, FENOMEC, Mexico City 04510, DF, MexicoUniv Edinburgh, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Michoacana San Nicolas de Hidalgo, Dept Fis, Morelia, Michoacan, MexicoCorichi, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, FENOMEC, A Postal 70-543, Mexico City 04510, DF, Mexico TI - Quantum collapse of a small dust shell AB - The full quantum mechanical collapse of a small relativistic dust shell is studied analytically, asymptotically and numerically starting from the exact finite dimensional classical reduced Hamiltonian recently derived by Hajicek and Kuchar. The formulation of the quantum mechanics encounters two problems. The first is the multivalued nature of the Hamiltonian and the second is the construction of an appropriate self-adjoint momentum operator in the space of the shell motion which is confined to a half-line. The first problem is solved by identifying and neglecting orbits of small action in order to obtain a single valued Hamiltonian. The second problem is solved by introducing an appropriate lapse function. The resulting quantum mechanics is then studied by means of analytical and numerical techniques. We find that the region of total collapse has a very small probability. We also find that the solution concentrates around the classical Schwarzschild radius. The present work obtains from first principles a quantum mechanics for the shell and provides numerical solutions, whose behavior is explained by a detailed WKB analysis for a wide class of collapsing shells MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - United Kingdom PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000174548100041 L2 - GRAVITATING SHELLS; DYNAMICS; FORMALISM SO - Physical Review D 2002 ;65(6): 5172 UI - 11186 AU - Corma A AU - Bermudez O AU - Martinez C AU - Ortega FJ AD - Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia, SpainInst Mexicano Petr, Mexico City 07730, DF, MexicoCorma, A, Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Avda Naranjos S-N, Valencia, Spain TI - Dilution effect of the feed on yield of olefins during catalytic cracking of vacuum gas oil AB - A vacuum gas oil has been co-fed with nitrogen at different partial pressures in a microacitivity (MAT) unit. The cracking rate versus hydrocarbon partial pressure can be fitted to a first-order kinetic rate equation. On the other hand, hydrogen transfer reactions, which follow second-order kinetics, are more affected than conversion by the decrease in hydrocarbon partial pressure, resulting in an increase in the yield of propylene and in general of LPG olefins. The decrease in conversion, due to the lowering of hydrocarbon partial pressure, could be compensated by a mechanical mixing effect introduced by the dilution gas that improves feed vaporization and mixing. It will be shown that a MAT unit can be used to show both effects separately, i.e. feed dilution and feed dispersion. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000175431500011 L2 - cracking;catalytic;partial pressure;microactivity test;olefins;dilution effect;catalytic cracking SO - Applied Catalysis A-General 2002 ;230(1-2):111-125 5173 UI - 10373 AU - Cornejo DR AU - Medina-Boudri A AU - Matutes-Aquino J AD - Univ Nacl Cordoba, RA-5000 Cordoba, ArgentinaUniv Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, BrazilCIMAV, Complejo Ind Chihuahua, Chihuahua 31109, CP, MexicoCornejo, DR, Univ Nacl Cordoba, Ciudad Univ, RA-5000 Cordoba, Argentina TI - Time-dependent magnetization in co-precipitated cobalt ferrite AB - A study of the magnetic aftereffect in co-precipitated cobalt ferrite is presented. Measurements of the magnetic viscosity S were performed at room temperature along the demagnetization curve for different applied fields H-ap over a wide range of fields (0 kOe < H-ap < -7kOe). The interrelation function 17 - (partial derivativeM(rev)/partial derivativeM(irr))(Hi) between the DCD reversible M, and irreversible M-irr magnetization components was determined as well. The experimental results for S-eta(H-i), where H-i is the internal field, showed a broad distribution with a maximum at H-i = 2.7kOe. However, the irreversible susceptibility chi(jrr) displays a maximum at H-c = 0.75 kOe, the coercivity of the material. The experimental behavior of eta and the non-proportionality between S-eta and chi(irr)(i) suggest that the magnetic viscosity in this material is principally supplied by events of nucleation of inverse domains and the depinning of domain walls. When the main mechanism of reversal magnetization changes to rotation of magnetic moments for all the grains, the magnetic viscosity decreases. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000177607700073 L2 - magnetic viscosity;magnetic aftereffect;cobalt ferrite;reversal magnetization;IRREVERSIBLE MAGNETIZATION; VISCOSITY SO - Physica B-Condensed Matter 2002 ;320(1-4):270-273 5174 UI - 10841 AU - Cornejo DR AU - Medina-Boudri A AU - Bertorello HR AU - Matutes-Aquino J AD - Natl Univ Cordoba, FAMAF, RA-5000 Cordoba, ArgentinaCIMAV, Chihualhua 31109, MexicoCornejo, DR, Natl Univ Cordoba, FAMAF, Ciudad Univ,Haya de la Torre & Medina Allende, RA-5000 Cordoba, Argentina TI - Magnetization reversal in co-precipitated cobalt ferrite AB - A study about the magnetic viscosity and magnetization reversal in co-precipitated cobalt ferrite was carried out. Measurements of direct current demagnetization reversible M-rev and irreversible M-irr magnetization as well as magnetic viscosity S, were performed at room temperature along the demagnetization curve for different applied fields H-ap (0 > H-ap > -7 kOe). From these data M-rev (M-irr)(H) curves were built. The experimental results show a minimum in the M-rev(M-irr)(H), curves and a non-proportionality between S-eta and chi(irr), suggesting two different contributions to the reversal magnetization during the demagnetization process. (C) 2002 Published by Elsevier Science B.V MH - Argentina MH - Mexico|Chihuahua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000176509600038 L2 - magnetization reversal;magnetic viscosity;cobalt ferrite;IRREVERSIBLE MAGNETIZATION; COFE2O4 SO - Journal of Magnetism and Magnetic Materials 2002 ;242():194-196 5175 UI - 9614 AU - Corona M AU - Gurrola GB AU - Merino E AU - Cassulini RR AU - Valdez-Cruza NA AU - Garcia B AU - Ramirez-Dominguez ME AU - Coronas FIV AU - Zamudio FZ AU - Wanke E AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoUniv Milano Bicocca, Dept Biotechnol & Biosci, I-20126 Milan, ItalyPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Avenida Univ 2001,POB 510-3, Cuernavaca 62210, Morelos, Mexico TI - A large number of novel Ergtoxin-like genes and ERG K+-channels blocking peptides from scorpions of the genus Centruroides AB - Twenty-three novel sequences similar to Ergtoxin (ErgTx) were obtained by direct sequencing of peptides or deduced from gene cloned using cDNAs of venomous glands of Centruroides (C) elegans, C exilicauda, C gracilis, C limpidus limpidus, C noxius and C sculpturatus. These peptides have from 42 to 47 amino acid residues cross-linked by four disulfide bridges. They share sequence similarities (60-98% compared with ErgTx1) and were shown to block ERG K+-channels of F-11 clone (N18TG-2xrat DRG) cultured cells. An unrooted phylogenetic tree analysis of these peptides showed that they conform at least five different subfamilies, of which three are novel subfamilies. (C) 2002 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000179799200024 L2 - Centruroides;ERG-channel;Ergtoxin;K+-channel;nomenclature;phylogeny;scorpion toxin;LONG QT SYNDROME; POTASSIUM CHANNEL; CARDIAC-ARRHYTHMIA; HERG; FAMILY; RECTIFIER; CELLS SO - Febs Letters 2002 ;532(1-2):121-126 5176 UI - 9261 AU - Cortes DA AU - Hogg PJ AU - Tanner KE AU - Escobedo JC AD - Univ London Queen Mary & Westfield Coll, IRC Biomed Mat, London E1 4NS, EnglandUniv London Queen Mary & Westfield Coll, Dept Mat Sci, London E1 4NS, EnglandCINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoCortes, DA, Univ London Queen Mary & Westfield Coll, IRC Biomed Mat, Mile End Rd, London E1 4NS, England TI - Mechanical properties of a novel bioactive ceramic system AB - A basic ceramic system was developed by mixing the low temperature form of wollastonite ceramics, sodium silicate and aluminium phosphate. In some cases, UHMW polyethylene powder has been added to the ceramic system during the mixing. The effect of maturation time and aluminium phosphate and polyethylene contents on the mechanical properties has been evaluated. By using four-point bending and double torsion tests the mechanical characterisation has been performed. The mechanical properties, with the exception of the maximum strength, are of the order of human cortical bone. This system allows other constituents to be added to the basic formulation to improve mechanical properties due to the presence of liquid sodium silicate that decreases the interfacial energy of ceramics. Thus, from the mechanical point of view, the materials developed may be suitable for the repair and reconstruction of bone MH - United Kingdom MH - Mexico|Coahuila PB - KRAKOW: POLISH ACAD SCIENCES COMMITTEE METALLURGY RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0860-7052 UR - ISI:000180844500005 L2 - HYDROXYAPATITE-REINFORCED POLYETHYLENE SO - Archives of Metallurgy 2002 ;47(4):409-419 5177 UI - 9169 AU - Cortes JCR AU - Sheremetov LB AD - Natl Tech Univ, IPN, CIC, Ctr Res Comp, Mexico City, DF, MexicoUniv Autonoma Metropolitana, Mexico City, DF, MexicoRussian Acad Sci, St Petersburg Inst Informat & Automat, SPIIRAS, Moscow 117901, RussiaCortes, JCR, Natl Tech Univ, IPN, CIC, Ctr Res Comp, Mexico City, DF, Mexico TI - Model of cooperation in multi-agent systems with fuzzy coalitions AB - Agent-based computing is a new paradigm to build complex distributed computer systems. The article explores one of the key issues of agent-based computing - the problem of interactions in multi-agent systems (MAS) in dynamic organizational context. Particularly, the article describes an approach to the problem of coalition forming based on fuzzy coalition games with associated core, as well as fuzzy linear programming and genetic algorithms for the game solution search. The proposed approach enables coalition forming based on the fuzzy game theory and permits to change the way of MAS programming from the predefined ad-hoc architectures to dynamic flexible and agile systems with dynamic configurations developed on-line by the MAS itself. The proposed model is applied for the coalition forming for management of supply chain networks MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000181051500028 L2 - SEMANTICS SO - From Theory to Practice in Multi-Agent Systems 2002 ;2296():263-272 5178 UI - 11521 AU - Cortes MY AU - Bollmann J AD - Univ Autonoma Baja California Sur, Dept Geol Marina, La Paz 23080, BCS, MexicoETH Zurich, Inst Geol, CH-8092 Zurich, SwitzerlandCortes, MY, Univ Autonoma Baja California Sur, Dept Geol Marina, Carretera Km 5-5,Apdo Postal 19-B, La Paz 23080, BCS, Mexico TI - A new combination coccosphere of the heterococcolith species Coronosphaera mediterranea and the holococcolith species Calyptrolithophora hasleana MH - Mexico|Baja California Sur MH - Switzerland PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Editorial Material AV - English IS - 0967-0262 UR - ISI:000174629800013 L2 - INDIAN-OCEAN SO - European Journal of Phycology 2002 ;37(1):145-146 5179 UI - 10239 AU - Cortez-Rocha MO AU - Trigo-Stockli DM AU - Wetzel DL AU - Reed CR AD - Univ Sonora, Dept Food Res, Hermosillo 83000, Sonora, MexicoUniv Sonora, Grad Program, Hermosillo 83000, Sonora, MexicoKansas State Univ, Dept Grain Sci & Ind, Manhattan, KS 66506, USACortez-Rocha, MO, Univ Sonora, Dept Food Res, POB 1658, Hermosillo 83000, Sonora, Mexico TI - Effect of extrusion processing on fumonisin B-1 and hydrolyzed fumonisin B-1 in contaminated alkali-cooked corn MH - Mexico|Sonora MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000178203800002 L2 - LIQUID-CHROMATOGRAPHIC DETERMINATION; FUSARIUM-MONILIFORME; ESOPHAGEAL CANCER; TORTILLAS; TOXICITY; PRODUCTS; GRITS; FOODS SO - Bulletin of Environmental Contamination and Toxicology 2002 ;69(4):471-478 5180 UI - 10850 AU - Corzo G AU - Villegas E AU - Gomez-Lagunas F AU - Possani LD AU - Belokoneva OS AU - Nakajima T AD - Suntory Inst Bioorgan Res, Shimamoto, Osaka 6188503, JapanNatl Autonomous Univ Mexico, Dept Physiol, Sch Med, Mexico City 04510, DF, MexicoInst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoCorzo, G, Suntory Inst Bioorgan Res, Wakayamadai 1-1-1, Shimamoto, Osaka 6188503, Japan TI - Oxyopinins, large amphipathic peptides isolated from the venom of the wolf spider Oxyopes kitabensis with cytolytic properties and positive insecticidal cooperativity with spider neurotoxins AB - Five amphipathic peptides with antimicrobial, hemolytic, and insecticidal activity were isolated from the crude venom of the wolf spider Oxyopes kitabensis. The peptides, named oxyopinins, are the largest linear cationic amphipathic peptides from the venom of a spider that have been chemically characterized at present. According to their primary structure Oxyopinin 1 is composed of 48 amino acid residues showing extended sequence similarity to the ant insecticidal peptide ponericinL2 and to the frog antimicrobial peptide dermaseptin. Oxyopinins 2a, 2b, 2c, and 2d have highly similar sequences. At least 27 out of 37 amino acid residues are conserved. They also show a segment of sequence similar to ponericinL2. Circular dichroism analyses showed that the secondary structure of the five peptides is essentially a-helical. Oxyopinins showed disrupting activities toward both biological membranes and artificial vesicles, particularly to those rich in phosphatidylcholine. Electrophysiological recordings performed on insect cells (Sf9) showed that the oxyopinins produce a drastic reduction of cell membrane resistance by opening non-selective ion channels. Additionally, a new paralytic neurotoxin named Oxytoxin 1 was purified from the same spider venom. It contains 69 amino acid residue cross-linked by five disulfide bridges. Application of mixtures containing oxyopinins and Oxytoxin 1 to insect larvae showed a potentiation phenomenon, by which an increase lethality effect is observed. These results suggest that the linear amphipathic peptides in spider venoms and neuropeptides cooperate to capture insects efficiently MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000176475700069 L2 - AMINO-ACID-SEQUENCE; PHONEUTRIA-NIGRIVENTER KEYS; SCORPION PANDINUS-IMPERATOR; ANTIMICROBIAL PEPTIDES; ANTIBACTERIAL PEPTIDE; LIPID BILAYERS; CHANNELS; TOXINS; MODEL; MAGAININ-2 SO - Journal of Biological Chemistry 2002 ;277(26):23627-23637 5181 UI - 10168 AU - Cossio-Bayugar R AU - Wagner GG AU - Holman PJ AD - Texas A&M Univ, Dept Vet Pathobiol, Coll Vet Med, College Stn, TX 77843, USACossio-Bayugar, R, INIFAP, SAGAR, Cenid Parasitol Vet, Apartado Postal 206 Civac, Morelos 62500, Mexico TI - In vitro generation of organophosphate resistant Boophilus microplus (Acari : Ixodidae) cell lines AB - Three organophosphate resistant Boophilus microplus Canestrini cell lines were generated by exposing B. microplus VIII-SCC cell line to incrementally increased toxic concentrations of the acaricide coumaphos. The development of resistance was evidenced by LC50 values elevated over those of control cells. The resistant cell lines selected in higher concentrations of organophosphate, designated C44 and C54, also had significantly slower duplication rates than a resistant cell line selected in lower concentrations of coumaphos (C34) and the nonresistant control cells. Resistant cell lines C44 and C54 also bad significantly higher levels of esterase after exposure to coumaphos than resistant cell line C34 and the nonresistant controls. These in vitro results agree with reports of increased esterase activity associated with organophosphate resistance in B. microplus ticks in vivo MH - Mexico|Morelos MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000178371700005 L2 - Boophilus microplus;tick cell lines;organophosphate resistance;coumaphos;in vitro culture;esterases;CATTLE TICK; INSECTICIDE RESISTANCE; MULTIDRUG-RESISTANCE; ESTERASE-ACTIVITY; STRAINS; BIOCHEMISTRY; MECHANISMS; TOXICITY SO - Journal of Medical Entomology 2002 ;39(2):278-284 5182 UI - 9543 AU - costa-Alejandro M AU - de Leon JM AU - Conradson SD AU - Bishop AR AD - CINVESTAV Merida, Yucatan 97310, MexicoLos Alamos Natl Lab, Los Alamos, NM 87545, USAAcosta-Alejandro, M, CINVESTAV Merida, AP 73, Yucatan 97310, Mexico TI - Evidence for a local structural change in La2CuO4.1 across the superconducting transition AB - Polarized Cu-K edge XAFS (X-ray absorption fine structure) on La2CuO4.1 indicate that the radial distribution function of the copper in plane oxygen pairs is a two-site distribution, in agreement with the results found by Bianconi et A for temperatures below the appearance of a pseudogap. Additionally we find evidence of a change in this distribution across the superconducting transition, suggesting coupling between the local lattice structure and the charged particles involved in the superconductivity MH - Mexico|Yucatan MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 7 U4 - Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0896-1107 UR - ISI:000179847600010 L2 - dynamically inhomogeneous ground state;XAFS;radial distribution function;electron-lattice coupling;HIGH-TEMPERATURE SUPERCONDUCTORS; ABSORPTION FINE-STRUCTURE; CUO2 PLANE; PHASE-SEPARATION; LATTICE; LA1.85SR0.15CUO4; FLUCTUATIONS; YBA2CU3O7; SYSTEM SO - Journal of Superconductivity 2002 ;15(5):355-360 5183 UI - 10294 AU - Cosultchi A AU - Garcia-Borquez A AU - guilar-Hernandez J AU - Yee-Madeira H AU - Reguera E AU - Lara VH AU - Bosch P AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIPN, ESIQIE, Dept Engn Met, Mexico City 07738, DF, MexicoIPN, ESFM, Mexico City 07738, DF, MexicoUniv La Habana, Havana, CubaUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoCosultchi, A, Inst Mexicano Petr, 152 Eje Cent L Cardenas, Mexico City 07730, DF, Mexico TI - Formation of petroleum organic deposits on steel surfaces AB - An adhered organic deposit, formed within the petroleum well on the steel surface of the tubing walls, was systematically characterized following a sequence of bulk and surface techniques. The results allowed the identification of the tubing wall and its internal surface structures. As a consequence of the contact with sulphur-bearing compounds such as H2S and brine from petroleum, the pre-oxidized steel surface was modified by non-stoichiometric iron compound formation. These new iron phases favour adsorption and chemisorption of the petroleum polar compounds on the steel surface. Copyright (C) 2002 John Wiley Sons, Ltd MH - Cuba MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0142-2421 UR - ISI:000177885900083 L2 - petroleum well;carbon steel surface;adherence;SEM-EDS;AES;XRD;Mossbauer;FTIR;Raman;spectroscopy;OXIDE SURFACES; IRON-OXIDES; CATALYST SO - Surface and Interface Analysis 2002 ;34(1):384-388 5184 UI - 11242 AU - Cota E AU - Rojas F AU - Ulloa SE AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoOhio Univ, Dept Phys & Astonomy, Condensed Matter & Surface Sci Program, Athens, OH 45701, USACota, E, UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Dissipative dynamics in quantum dot cell Arrays AB - We present calculations for the static and dynamical properties of two parallel double dots, with one extra electron each, constituting a four-dot QCA basic cell. When a potential difference is applied to one of the double dots, causing the electron to switch, we find that the electron on the other double dot switches accordingly, in response to inter-cell Coulomb interactions. We include dissipative effects via a master equation approach describing the time evolution of the density matrix for the four-dot cell MH - Mexico|Baja California MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000175278300020 L2 - AUTOMATA; SYSTEMS SO - Physica Status Solidi B-Basic Research 2002 ;230(2):377-383 5185 UI - 10081 AU - Cota L AU - Ponce F AU - Ulloa S AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22835, Baja California, MexicoArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAOhio Univ, Dept Phys & Astron, Athens, OH 45701, USACota, L, UNAM, Ctr Ciencias Mat Condensada, Apdo Postal 2681, Ensenada 22835, Baja California, Mexico TI - Preface MH - Mexico|Baja California MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Editorial Material AV - English IS - 0218-625X UR - ISI:000178447400001 SO - Surface Review and Letters 2002 ;9(5-6):III-IIV 5186 UI - 10471 AU - Cotti U AU - az-Cruz JL AU - Gaitan R AU - Gonzales H AU - Hernandez-Galeana A AD - UMSNH, IFM, Morelia 58041, Michoacan, MexicoBUAP, Inst Fis, Puebla 72570, MexicoFac Estudios Super Cuautitlan, Ctr Invest Teor, Cuautitlan, Mexico, MexicoUniv Surcolombiana, Dept Fis, Neiva, ColombiaInst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoCotti, U, UMSNH, IFM, AP 2-82, Morelia 58041, Michoacan, Mexico TI - New Higgs signals induced by mirror fermion mixing effects AB - We study the conditions under which flavor violation arises in scalar-fermion interactions, as a result of the mixing phenomena between the standard model and exotic fermions. Phenomenological consequences are discussed within the specific context of a left-right model where these additional fermions have mirror properties under the new SU(2)(R) gauge group. Bounds on the parameters of the model are obtained from LFV processes; these results are then used to study the LFV Higgs decays (H-->taul(j), l(j)=e,mu), which reach branching ratios that could be detected at future colliders MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Michoacan MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177338600056 L2 - CHANGING NEUTRAL COUPLINGS; STRONG CP PROBLEM; MU-E CONVERSION; GAUGE THEORIES; PHYSICS; LEPTON; DECAYS; NONCONSERVATION; CONSTRAINTS; NEUTRINOS SO - Physical Review D 2002 ;66(1): 5187 UI - 11353 AU - Coureaud G AU - Schaal B AU - Hudson R AU - Orgeur P AU - Coudert P AD - Ctr European Sci Gout, Ethol & Sensory Psychobiol Grp, CNRS FRE2049, Dijon, FranceUniv Nacl Autonoma Mexico, Dev Psychobiol Lab, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nouzilly, INRA, CNRS, UMR 6073,Unite Rech Physiol Reprod & Comportement, Nouzilly, FranceINRA, Unite Pathol Lapin, Stn Rech Pathol & Parasitol Aviaire, F-37380 Nouzilly, FranceSchaal, B, Ctr European Sci Gout, Ethol & Sensory Psychobiol Grp, CNRS FRE2049, Dijon, France TI - Transnatal olfactory continuity in the rabbit: Behavioral evidence and short-term consequence of its disruption AB - This study investigates the role of prenatal odor learning on postnatal adaptive orientation responses in the newborn rabbit. Preference tests revealed that pups are equally attracted to the odors of placentae and colostrum (Experiments 1-4), suggesting that an odor continuity may exist between the fetal and neonatal environments. To test some predictions derived from this hypothesis, we manipulated the odor of the diet of pregnant-lactating does to control the chemical niches of their perinates. Fetuses exposed in this way to the odor of cumin (C) were selectively attracted as neonates to the odor of pare C (Experiment 6). Prenatal exposure to C also was followed, to a certain extent, by enhanced attraction to C odor in the placenta or colostrum from females which had consumed it (Experiments 5 & 7). Finally, the functional implications of perinatal odor continuity were tested by disrupting it. The odor component of the feto-neonatal transitional environment revealed indeed to affect the ability, of certain pups to gain colostrum and milk at the very first sucking opportunities (Experiment 8). (C) 2002 Wiley Periodicals, Inc MH - France MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 19 U4 - Developmental Biology;Psychology U5 - J;Article AV - English IS - 0012-1630 UR - ISI:000175174100003 L2 - european rabbit (Oryctolagus cuniculus);fetus;newborn;olfaction;placenta;colostrum;fetal perception;neonatal adaptation;AMNIOTIC-FLUID; NEWBORN RABBITS; MOTHERS DIET; NEONATAL RESPONSIVENESS; RAT PUPS; ODOR; FETAL; FOOD; MILK; STIMULI SO - Developmental Psychobiology 2002 ;40(4):372-390 5188 UI - 9268 AU - Covington AM AU - Aguilar A AU - Covington IR AU - Gharaibeh MF AU - Hinojosa G AU - Shirley CA AU - Phaneuf RA AU - Alvarez I AU - Cisneros C AU - Dominguez-Lopez I AU - Sant'Anna MM AU - Schlachter AS AU - McLaughlin BM AU - Dalgarno A AD - Univ Nevada, Dept Phys, Reno, NV 89557, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USACovington, AM, Univ Nevada, Dept Phys, MS 220, Reno, NV 89557, USA TI - Photoionization of Ne+ using synchrotron radiation AB - Absolute measurements of cross sections for photoionization of a statistical admixture of Ne+ in the P-2(3/2)0 ground state and the P-2(1/2)0 metastable state are reported in the energy range 40-71 eV at photon energy resolutions ranging from 22 meV to 2 meV. The experiments were performed using synchrotron radiation from an undulator beamline of the Advanced Light Source with a newly developed ion-photon-beam endstation. The data are characterized by multiple Rydberg series of autoionizing resonances superimposed upon a direct photoionization background cross section where some of the observed resonance line shapes show evidence of interference between the direct and indirect photoionization channels. The resonance features are assigned spectroscopically, and their energies and quantum defects are tabulated. The experimental photoionization cross sections are in satisfactory agreement with the predictions from theoretical calculations performed in intermediate coupling using the semirelativistic Breit-Pauli approximation with ten states. The resonances nearest to the ionization thresholds exhibit anomalous behavior with respect to their positions and strengths due to the presence of interloping resonances associated with higher-lying ionic states causing disruption of the regular Rydberg, spectral pattern MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 40 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000180656800062 L2 - R-MATRIX THEORY; CROSS-SECTIONS; ATOMIC FLUORINE; IONS; NEON; C+ SO - Physical Review A 2002 ;66(6): 5189 UI - 11236 AU - Cowie MR AU - Mendez GF AD - Univ London Imperial Coll Sci Technol & Med, Royal Brompton Hosp, London, EnglandNatl Med Ctr, Inst Mexicano Seguro Social, Cardiol Hosp Siglo XXI, Mexico City, DF, MexicoCowie, MR, Univ London Imperial Coll Sci Technol & Med, Fac Med, Natl Heart & Lung Inst, Dovehouse St, London SW3 6LY, England TI - BNP and congestive heart failure MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 60 U4 - Cardiac & Cardiovascular Systems U5 - J;Review AV - English IS - 0033-0620 UR - ISI:000175237500006 L2 - BRAIN NATRIURETIC PEPTIDE; LEFT-VENTRICULAR DYSFUNCTION; ACUTE MYOCARDIAL-INFARCTION; ANGIOTENSIN-CONVERTING-ENZYME; INCREASED PLASMA-LEVELS; TRANSLUMINAL CORONARY ANGIOPLASTY; IDIOPATHIC DILATED CARDIOMYOPATHY; NEUTRAL ENDOPEPTIDASE INHIBITION; HYPERVENTILATION-INDUCED ATTACKS; DEPENDENT DIABETIC-PATIENTS SO - Progress in Cardiovascular Diseases 2002 ;44(4):293-321 5190 UI - 10396 AU - Coyaji K AU - Elul B AU - Krishna U AU - Otiv S AU - Ambardekar S AU - Bopardikar A AU - Raote V AU - Ellertson C AU - Winikoff B AD - KEM Hosp, Pune, Maharashtra, IndiaPopulat Council, New York, NY 10021, USABhatia Gen Hosp, Mumbai, IndiaPopulat Council, Mexico City, DF, MexicoWinikoff, B, KEM Hosp, Pune, Maharashtra, India TI - Mifepristone-misoprostol abortion: a trial in rural and urban Maharashtra, India AB - As several important policy questions remain regarding the use of medical abortion in developing countries, we investigated the safety, efficacy, and acceptability of mifepristone-misoprostol abortion in the outpatient family planning departments of two urban hospitals and one rural hospital in India, Nine-hundred women (with gestations of less than or equal to63 days in the urban sites and less than or equal to56 days in the rural site) received 600 mg mifepristone followed 48 h later by 400 mug oral misoprostol in the clinic. Four point four percent or fewer urban women and 1.0% rural women were lost to follow-up. Perfect and typical-use failure rates were low at all sites. While rural women reported fewer side effects at all sites, the vast majority of women were satisfied with their medical abortions. Medical abortion can be offered safely, effectively, and acceptably in the outpatient family planning departments of urban and rural hospitals in India. (C) 2002 Elsevier Science Inc. All rights reserved MH - India MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 10 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000177673900007 L2 - mifepristone;misoprostol;medical abortion;developing countries;MEDICAL ABORTION; ACCEPTABILITY; PREGNANCY; EFFICACY; SAFETY; CHINA; CUBA SO - Contraception 2002 ;66(1):33-40 5191 UI - 11651 AU - Crescio E AU - Bondila M AU - Bonvicini V AU - Cerello P AU - Giubellino P AU - Kolojvari A AU - Martinez MI AU - Mazza G AU - Montano LM AU - Nouais D AU - Piano S AU - Piemonte C AU - Rashevsky A AU - Rivetti A AU - Tosello F AU - Vacchi A AU - Wheadon R AD - Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyUniv Turin, Turin, ItalyUniv Jyvaskyla, SF-40351 Jyvaskyla, FinlandIst Nazl Fis Nucl, Sez Trieste, Trieste, ItalySt Petersburg State Univ, St Petersburg 198904, RussiaCINVESTAV, Mexico City 14000, DF, MexicoCrescio, E, Ist Nazl Fis Nucl, Sez Torino, Via Pietro Giuria 1, I-10125 Turin, Italy TI - Recent results from beam tests of large area silicon drift detectors AB - Silicon drift detectors with an active area of 7.0 x 7.5 cm(2) will equip the two middle layers of the Inner Tracking System of the ALICE experiment. The performance of several prototypes was studied during beam tests carried out at the CERN SPS facility, The results of the beam test data analysis are discussed in this paper. (C) 2002 Elsevier Science B.V. All rights reserved MH - Finland MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000174205100060 L2 - silicon drift detectors;beam test;resolution SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;478(1-2):321-324 5192 UI - 9913 AU - Cretiu G AU - Silaghi-Dumitrescu L AU - Silaghi-Dumitrescu L AU - Escudie J AU - Toscano A AU - Hernandez S AU - Cea-Olivares R AD - Univ Babes Bolyai, Dept Chem, RO-3400 Cluj Napoca, RomaniaUniv Toulouse 3, UMR 5069, F-31062 Toulouse 04, FranceUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoSilaghi-Dumitrescu, L, Univ Babes Bolyai, Dept Chem, Kogalniceanu Str 1, RO-3400 Cluj Napoca, Romania TI - Difluorenylsilane derivatives, a class of compounds exhibiting strong intra- and intermolecular C-H center dot center dot center dot pi interactions. Crystal and molecular structures of bis(9-methylfluoren-9-yl)dimethylsilane and (9-methylfluoren-9-yl)(fluoren-9-yl) dimethylsilane AB - The crystal and molecular structures of substituted difluorenyl-(dimethyl)silanes Me2Si(CR'R-2)(CR"R-2) (R = H, R" = Me 1 and R' = R" = Me 2, CR2 = fluorenyl) have been determined by X-ray diffraction and compared with the conformations available in the gas phase. 1 and 2 crystallize in the P2(1)/m and P2(1)/c space groups with the cell parameters: a 7.191 Angstrom, b = 17.658 Angstrom, c = 8.982 Angstrom, a = gamma = 90degrees, beta = 101.880degrees (1) and a = 13.132 Angstrom, b = 7.463 Angstrom, c = 24.438 Angstrom, alpha = gamma = 90degrees, beta = 99.73degrees (2), respectively. Both compounds as well as the unsubstituted parent silane Me2Si(CHR2)(2) (3) exhibit extensive intramolecular and intermolecular C-H...pi. it interactions leading to supramolecular associations. Gas phase conformations predicted on the basis of AMI sermempirical molecular orbital calculations support the existence of these intramolecular interactions and correlate well with the temperature dependent proton NMR spectra. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Romania PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000179023300014 L2 - difluorenylsilanes;crystal structures of;molecular structures of;conformationat analysis;AMI semiempirical calculations;inter- and intramolecular C-H center dot center dot center dot pi interactions;DOUBLE-BOND; = ALKYL; POLYMERIZATION; COMPLEXES; STABILIZATION; METALLOCENES; PRECURSORS; CATALYSTS; PROPYLENE; ETHYLENE SO - Journal of Organometallic Chemistry 2002 ;659(1-2):95-101 5193 UI - 8705 AU - Criado-Sancho M AU - Jou D AU - Casas-Vazquez J AU - del Castillo LF AD - Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, SpainUNED, Dept Ciencias & Tecn Fis Quim, Madrid 28040, SpainInst Estudis Catalans, Barcelona 08001, Catalonia, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCriado-Sancho, M, Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, Spain TI - Shear-induced shift of the critical point in diluted and entangled polymer solutions AB - Previous thermodynamic analyses of shear-induced shift of the spinodal line in diluted polymer solutions in plane Couette flows are extended here to the entangled regime by using the reptation model. The most significant difference with respect to the dilute regime is a shift of the critical point towards lower temperature at constant viscous pressure, in contrast with the increase of the critical temperature in the dilute regime; at constant shear rate, a positive shift of the critical temperature is predicted both in the dilute and the entangled regimes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000176342700001 L2 - polymer solutions;chemical potential;non-equilibrium thermodynamics;PHASE-SEPARATION; COMPLEX FLUIDS; FLOW; THERMODYNAMICS; MIGRATION; DYNAMICS SO - Physica A-Statistical Mechanics and Its Applications 2002 ;309(1-2):1-14 5194 UI - 9378 AU - Criado-Sancho M AU - Jou D AU - Casas-Vazquez J AU - del Castillo LF AD - UNED, Fac Ciencias, Dept Ciencias & Tecn Fisicoquim, Madrid, SpainUniv Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, SpainInst Estudis Catalans, Bellaterra 08001, Catalonia, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Dept Polimeros, Mexico City 04510, DF, MexicoCriado-Sancho, M, UNED, Fac Ciencias, Dept Ciencias & Tecn Fisicoquim, Senda Rey 9, Madrid, Spain TI - Shear-induced shift of spinodal line in entangled polymer blends AB - We study the shear-flow effects on phase separation of entangled polymer blends by incorporating into the chemical potential a nonequilibrium contribution due to the flow. The results are compared with those of a previous analysis by other authors which did not modify the chemical potential but used a different assumption for the stress tensor of the blend MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000180427000055 L2 - EXTENDED IRREVERSIBLE THERMODYNAMICS; PHASE-SEPARATION; FLOW; MIGRATION; EQUATIONS; STRESS SO - Physical Review e 2002 ;66(6): 5195 UI - 11124 AU - Crich D AU - Sartillo-Piscil F AU - Quintero-Cortes L AU - Wink DJ AD - Univ Illinois, Dept Chem, Chicago, IL 60607, USAUniv Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, MexicoCrich, D, Univ Illinois, Dept Chem, 845 W Taylor St, Chicago, IL 60607 USA TI - Radical contraction of 1,3,2-dioxaphosphepanes to 1,3,2-dioxaphosphorinanes: A kinetic and O-17 NMR spectroscopic study AB - Two diastereomeric 5-bromo-4-phenyl-2-phetioxy-2-oxo-1,3,2-dioxophosphopanes have been synthesized and used to study the contraction of 4-phenyl-2-phenoxy-2-oxo-1,3,2-dioxophosphorinan-5-yl radicals. Kinetics were determined by competition methods and demonstrate Arrhenius parameters typical of rearrangements of this kind. Isotopic labeling reveals, that all rearrangements are formally of the 1,2-type with retention of configuration at phosphorus. Analysis of the stereochemistry of the rearrangements, however, reveals the two diastereomers to take different paths with respect to the geometry of the presumed alkene radical cation intermediate MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000175602300026 L2 - LASER FLASH-PHOTOLYSIS; BETA-(PHOSPHATOXY)ALKYL RADICALS; ARRHENIUS PARAMETERS; CATALYTIC QUANTITIES; DIPHENYL DISELENIDE; PHOSPHATE MIGRATION; RATE CONSTANTS; STEREOCHEMISTRY; BENZENESELENOL; REARRANGEMENT SO - Journal of Organic Chemistry 2002 ;67(10):3360-3364 5196 UI - 12013 AU - Crich D AU - de la Mora MA AU - Cruz R AD - Univ Illinois, Dept Chem, Chicago, IL 60607, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoCrich, D, Univ Illinois, Dept Chem, 845 W Taylor St, Chicago, IL 60607 USA TI - Synthesis of the mannosyl erythritol lipid MEL A; confirmation of the configuration of the meso-erythritol moiety AB - The total synthesis of the two possible diastereomers of mannosylerythritol lipid A, a novel biosurfactant from Candida antartica T-34 with promising anti-proliferative properties in several cell lines, is described. By comparison with an authentic sample, the natural material is confirmed as a single diastereomer with the 4-O-(beta -D-mannopyranosyl) D-erythritol configuration. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000173069900003 L2 - mannosyl erythritol lipid;meso-erythritol;biosurfactant;GLYCOSYLATION; DIFFERENTIATION; GLYCOLIPIDS SO - Tetrahedron 2002 ;58(1):35-44 5197 UI - 9705 AU - Cristan AC AU - Walden AT AD - Natl Autonomous Univ Mexico, Inst Invest Matemat Aplicados & Sistemas, Mexico City 04510, DF, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Math, London, EnglandCristan, AC, Natl Autonomous Univ Mexico, Inst Invest Matemat Aplicados & Sistemas, Mexico City 04510, DF, Mexico TI - Multitaper power spectrum estimation and thresholding: Wavelet packets versus wavelets AB - Recently, it was suggested that spectrum estimation can be accomplished by applying wavelet denoising methodology to wavelet packet coefficients derived from the logarithm of a spectrum estimate. The particular algorithm we consider consists of computing the logarithm of the multitaper spectrum estimator, applying an orthonormal transform derived from a wavelet packet tree to the log multitaper spectrum ordinates, thresholding the empirical wavelet packet coefficients, and then inverting the transform. For a small number of tapers, suitable transforms/partitions for the logarithm of the multitaper spectrum estimator are derived using a method matched to statistical thresholding properties. The partitions thus derived starting from different stationary time series are all similar and easily derived, and any differences between the wavelet packet and discrete wavelet transform (DWT) approaches are minimal. For a larger number of tapers, where the chosen parameters satisfy the conditions of a proven theorem, the simple DWT again emerges as appropriate. Hence, using our approach to thresholding and the method of partitioning, we conclude that the DWT approach is a very adequate wavelet-based approach and that the use of wavelet packets is unnecessary MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1053-587X UR - ISI:000179611000007 L2 - estimation;spectral analysis;statistics;time series;wavelet transforms;NOISE SO - Ieee Transactions on Signal Processing 2002 ;50(12):2976-2986 5198 UI - 9468 AU - Crivellari L AU - Cardona O AU - Simonneau E AD - Osserv Astron Trieste, I-34131 Trieste, ItalyInst Astrofis Canarias, E-38200 San Cristobal la Laguna, SpainInst Nacl Astrofis Opt & Elect, Puebla, MexicoCNRS, Inst Astrophys, F-75700 Paris, FranceCrivellari, L, Osserv Astron Trieste, I-34131 Trieste, Italy TI - Multilevel line transfer with the implicit integral method AB - Once the need for an iterative procedure in order to solve the problem of the formation of spectral lines in the case of a model atom with many energy levels, the sequel is to seek for the most effective form of such an iterative scheme. It is an almost universal is assumed within all the iterative methods for the solution of those radiative transfer problems, in which the transfer equations are coupled to the state of the matter, to take as the input of each step of iterations the values of the opacity coefficients obtained as a result of the previous one. This is, for instance, the procedure used to correct the temperature in the computation of stellar atmosphere models, or that to build the Lambda -operator (either the exact or the approximated one) within the Accelerated Lambda Iteration methods. Yet, if we assume, in order to solve the multilevel line transfer problem, that at each step of iterations the line opacities are known, we can express via the statistical equilibrium equations the populations of the energy levels - and consequently the source functions of the relevant spectral lines - as a linear function of the full set of the corresponding mean intensities of the radiation field. Once such linear forms for the source functions, we are able to solve without the need of any further approximation the radiative transfer equations for are obtained lines, now linearly coupled through the above linear forms of the statistical equilibrium equations. This is achieved by means of the Implicit Integral Method that we already presented in a series of previous papers MH - France MH - Italy MH - Mexico|Puebla MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0571-7256 UR - ISI:000180277500012 L2 - line : formation;radiative transfer;RADIATIVE-TRANSFER PROBLEMS SO - Astrophysics 2002 ;45(4):480-488 5199 UI - 11078 AU - Crocco AG AU - Villasis-Keever M AU - Jadad AR AD - McGill Univ, Montreal Childrens Hosp, Montreal, PQ H3H 1P3, CanadaInst Mexicano Seguro Social, Pediat Hosp, Clin Epidemiol Unit, Mexico City, DF, MexicoUniv Hlth Network, Ctr Global eHlth Innovat, Dept Hlth Policy, Toronto, ON, CanadaUniv Hlth Network, Ctr Global eHlth Innovat, Dept Management & Evaluat, Toronto, ON, CanadaUniv Hlth Network, Ctr Global eHlth Innovat, Dept Anaesthesia, Toronto, ON, CanadaUniv Toronto, Toronto, ON, CanadaJadad, AR, Toronto Gen Hosp, Ctr Global eHlth Innovat, Fraser Elliott Bldg,4th Floor,190 Elizabeth St, Toronto, ON M5G 2C4, Canada TI - Analysis of cases of harm associated with use of health information on the Internet AB - Context There is concern about the potential harm associated with the use of poor quality health information on the Internet. To date, there have been no systematic attempts to examine reported cases of such harm. Methods We conducted a systematic review of the peer-reviewed literature, to evaluate the number and characteristics of reported cases of harm associated with the use of health information obtained on the Internet. Using a refined strategy, we searched MEDLINE (from 1966 to February 2001), CINAHL (from 1982 to March 2001), HealthStar (from 1975 to December 2000), PsycINFO (from 1967 to March 2001), and EMBASE (from 1980 to March 2001). This was complemented with searches of reference lists. Two authors separately reviewed the abstracts to identify articles that describe at least 1 case of harm associated with the use of health information found on the Internet. Articles of any format and in any language deemed possibly relevant by either researcher were obtained and reviewed by both researches. Results The search yielded 1512 abstracts. Of these 186 papers were reviewed in full text. Of these, 3 articles satisfied the selection criteria. One article described 2 cases in which improper Internet searches led to emotional harm. The second article described dogs being poisoned because of misinformation obtained on the Internet. The third article described hepatorenal failure in an oncology patient who obtained misinformation about the use of medication on the Internet. Conclusions Despite the popularity of publications warning of the potential harm associated with using health information from the Internet, our search found few reported cases of harm. This may be due to an actual low risk for harm associated with the use of information available on the Internet, to underreporting of cases, or to bias MH - Canada MH - Mexico|Distrito Federal PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 32 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0098-7484 UR - ISI:000176002200034 L2 - READABILITY; PATIENT SO - Jama-Journal of the American Medical Association 2002 ;287(21):2869-2871 5200 UI - 11649 AU - Crocco AG AU - Villasis-Keever M AU - Jadad AR AD - McGill Univ, Montreal, PQ H3G 1Y6, CanadaMcMaster Univ, Fac Hlth Sci, Hlth Informat Res Unit, Hamilton, ON L8N 3Z5, CanadaInst Mexicano Seguro Social, Pediat Hosp, Clin Epidemiol Unit, Mexico City 6698, DF, MexicoUniv Toronto, Toronto, ON M5G 2C4, CanadaUniv Hlth Network, Ctr Global eHlth Innovat, Rose Family Chair Support Care, Dept Anesthesiol & Hlth Policy, Toronto, ON M5G 2C4, CanadaUniv Hlth Network, Ctr Global eHlth Innovat, Rose Family Chair Support Care, Dept Management, Toronto, ON M5G 2C4, CanadaUniv Hlth Network, Ctr Global eHlth Innovat, Rose Family Chair Support Care, Dept Evaluat, Toronto, ON M5G 2C4, CanadaJadad, AR, Toronto Gen Hosp, Ctr Global eHlth Innovat, Eaton Wing EN 6-238,200 Elizabeth St, Toronto, ON M5G 2C4, Canada TI - Two wrongs don't make a right: Harm aggravated by inaccurate information on the Internet AB - There has been much concern expressed in the literature about the use of medical information on the Internet by patients and families. Although much work has been done to quantify the misinformation available on the Internet, there have not been reports of actual harm to children resulting from this misinformation. We present the case of a 1-year-old boy whose clinical course of diarrhea was complicated not only by inaccurate advice given by the emergency room physician, but also by the same advice received from the Internet MH - Canada MH - Mexico|Distrito Federal PB - ELK GROVE VILLAGE: AMER ACAD PEDIATRICS RP - NOT IN FILE U3 - TC 6 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-4005 UR - ISI:000174202800036 L2 - Internet;child;case report;medical errors;harm SO - Pediatrics 2002 ;109(3):522-523 5201 UI - 10930 AU - Croll DA AU - Clark CW AU - Acevedo A AU - Tershy B AU - Flores S AU - Gedamke J AU - Urban J AD - Univ Calif Santa Cruz, Ctr Ocean Hlth, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95060, USACornell Lab Ornithol, Bioacoust Res Program, Ithaca, NY 14850, USACalif Acad Sci, San Francisco, CA 94118, USAUniv Autonoma Baja Calif Sur, La Paz, BCS, MexicoCroll, DA, Univ Calif Santa Cruz, Ctr Ocean Hlth, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95060 USA TI - Bioacoustics: Only male fin whales sing loud songs - These mammals need to call long-distance when it comes to attracting females MH - USA MH - Mexico|Baja California Sur PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 18 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0028-0836 UR - ISI:000176285600034 L2 - BLUE SO - Nature 2002 ;417(6891):809-809 5202 UI - 11609 AU - Cronin K AU - Abodayeh K AU - Caro-Corrales J AD - Natl Univ Ireland Univ Coll Cork, Dept Proc Engn, Cork, IrelandInst Politecn Nacl, Mexico City, DF, MexicoCronin, K, Natl Univ Ireland Univ Coll Cork, Dept Proc Engn, Cork, Ireland TI - Probabilistic analysis and design of the industrial timber drying process AB - The distribution in the moisture content of dried planks is an important parameter for kiln operators. The evolution of variability in the moisture content of timber boards during a batch drying process is investigated. This random variability in moisture content arises from a distribution in plank initial moisture content and dispersion in plank drying rate. A simple deterministic model of timber drying is outlined. Theoretical probabilistic analysis is applied to this model to predict the mean and standard deviation in board moisture content as a function of time. The solution is assessed with representative industrial kiln drying data. The utility of the approach in suggesting strategies to promote uniformity in anal moisture content is outlined using some design studies. These strategies include sorting of the timber by moisturecontent and adjusting the drying rate and equilibrium Moisture content to reduce variability. It is also demonstrated that the probabilistic approach can yield a better estimation of kiln average moisture content MH - Ireland MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical;Engineering, Mechanical U5 - J;Article AV - English IS - 0737-3937 UR - ISI:000174438400004 L2 - batch timber drying;probabilistic analysis;process design;LUMBER; SIMULATION; KILNS SO - Drying Technology 2002 ;20(2):307-324 5203 UI - 10278 AU - Crossa J AU - Cornelius PL AU - Yan WK AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Biomet & Stat Unit, Mexico City 06600, DF, MexicoUniv Kentucky, Dept Agron, Lexington, KY 40546, USAUniv Kentucky, Dept Stat, Lexington, KY 40546, USAUniv Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, CanadaCrossa, J, CIMMYT, Int Maize & Wheat Improvement Ctr, Biomet & Stat Unit, Lisboa 27,Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Biplots of linear-bilinear models for studying crossover genotype x environment interaction (vol 42, pg 619, 2001) MH - Canada MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Correction AV - English IS - 0011-183X UR - ISI:000177928000065 SO - Crop Science 2002 ;42(5):1761-1761 5204 UI - 11731 AU - Crossa J AU - Cornelius PL AU - Yan WK AD - CIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoUniv Kentucky, Dept Agron, Lexington, KY 40546, USAUniv Kentucky, Dept Stat, Lexington, KY 40546, USAUniv Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, CanadaCrossa, J, CIMMYT, Biometr & Stat Unit, Lisboa 27,Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Biplots of linear-bilinear models for studying crossover genotype x environment interaction AB - Linear-bilinear models, such as the Shifted Multiplicative Model (SHMM) and Sites Regression Model (SREG), have been used to develop clustering procedures for finding subsets of sites (or cultivars) without cultivar crossover interaction (non-COI). Biplots of these models are useful for visual evaluation of cultivar responses across environments. The main purposes of this study were to investigate (i) SREG(2) and SHMM2 biplots with the first multiplicative components constrained to be non-COI SREG(1) and SHMM1 solutions, (ii) how the biplots can be used for identifying subsets of sites and cultivars with different levels of COI and with non-COI, and (iii) how these biplots compare with results obtained when clustering only sites or cultivars without cultivar rank change. Transformed and untransformed data from two multienvironment cultivar trials were used for illustration. Biplots from SHMM2 and SREG(2) models graphically display the interaction variation due to low level COI or non-COI (first multiplicative term) versus the interaction variation due to COI (second multiplicative term). The biplots obtained by means of the non-COI first term constrained solution of the SREG(2) and SHMM2 models have the same interpretability properties as the standard biplots obtained by means of the unconstrained solution. With the unconstrained and constrained solutions, it is possible to identify subsets of sites and cultivars with low level COI and non-COL Biplots based on unsealed or scaled data produced similar results. Groups of sites and cultivars with low level COI and non-COI were similar to those found when only sites (or cultivars) were clustered into non-COI groups using the SHMM and SREG clustering approach MH - Canada MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 18 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000174093500042 L2 - SHIFTED MULTIPLICATIVE MODEL; RANK-CHANGE; GROUPING ENVIRONMENTS; CULTIVAR TRIALS; MATRICES SO - Crop Science 2002 ;42(2):619-633 5205 UI - 10203 AU - Cruz-Castillo JG AU - Woolley DJ AU - Lawes GS AD - Univ Autonoma Chapingo, Ctr Reg Univ Oriente, Huatusco 94100, Veracruz, MexicoMassey Univ, Coll Sci, Nat Resources Inst, Palmerston North, New ZealandCruz-Castillo, JG, Univ Autonoma Chapingo, Ctr Reg Univ Oriente, Apartado 49, Huatusco 94100, Veracruz, Mexico TI - Kiwifruit size and CPPU response are influenced by the time of anthesis AB - The cytokinin-active compound, N-1-(2-chloro-4-pyridyl)-N-3-phenylurea (CPPU), applied at different flowering dates, affected final 'Hayward' kiwifruit size. Ovaries from early opening flowers had significantly greater (P less than or equal to 0.05) length, diameter, and fresh and dry weight than late ovaries. Cell number and cell size in the inner and outer pericarp of the ovary at anthesis were similar for early and late opening flowers but core cell number was significantly higher (P < 0.05) in the early flowers. Fruit shape and ovary dry matter percentage at harvest was unaffected by the time of anthesis. When fruitlets from both types of flowers were treated with CPPU at 15 mul l(-1) there was a significant interaction, with the early flowers achieving a much larger commercial fruit size (153 g) than fruit from later flowers (126 g). CPPU-treated fruit from the two bloom dates achieved higher cell number in the outer pericarp at harvest. In contrast, the cell size in the inner pericarp of early and late untreated fruits was higher than CPPU-treated fruit. Pre-anthesis factors and early fruit growth were important in determining final fruit size. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Veracruz MH - New Zealand PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Horticulture U5 - J;Article AV - English IS - 0304-4238 UR - ISI:000178233200003 L2 - Actinidia deliciosa;cytokinin;fruit growth;forchlorfenuron;flower quality;FRUIT-GROWTH; QUALITY; APPLE; CULTIVARS; SEASON SO - Scientia Horticulturae 2002 ;95(1-2):23-30 5206 UI - 10385 AU - Cruz-Estrada RH AU - Folkes MJ AD - Brunel Univ, Fac Technol & Informat Syst, Uxbridge UB8 3PH, Middx, EnglandCruz-Estrada, RH, Ctr Invest Cient Yucatan, AC, Unidad Mat, Calle 43,No 130,Col Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Structure formation and modelling of the electrical conductivity in SBS-polyaniline blends - Part I - Percolation theory approach MH - United Kingdom MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000177677100011 L2 - POLYSTYRENE BLENDS; COMPOSITES; RESISTIVITY SO - Journal of Materials Science Letters 2002 ;21(18):1427-1429 5207 UI - 10386 AU - Cruz-Estrada RH AU - Folkes MJ AD - Brunel Univ, Fac Technol & Informat Syst, Uxbridge UB8 3PH, Middx, EnglandCruz-Estrada, RH, Ctr Invest Cient Yucatan, Ac, Unidad Mat, Calle 43,No 130,Col Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Structure formation and modelling of the electrical conductivity in SBS-polyaniline blends - Part II - Generalized effective media theories approach MH - United Kingdom MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000177677100012 L2 - COMPOSITES; RESISTIVITY SO - Journal of Materials Science Letters 2002 ;21(18):1431-1434 5208 UI - 10616 AU - Cruz-Morales SE AU - Santos NR AU - Brandao ML AD - FFCLRP, Lab Psicobiol, BR-14049901 Ribeirao Preto, SP, BrazilUNAM, FES Iztacala, Lab Psychopharmacol, Mexico City, DF, MexicoBrandao, ML, FFCLRP, Lab Psicobiol, Campus USP,Av Bandeirantes 3900, BR-14049901 Ribeirao Preto, SP, Brazil TI - One-trial tolerance to midazolam is due to enhancement of fear and reduction of anxiolytic-sensitive behaviors in the elevated plus-maze retest in the rat AB - The anxiolytic-like effects of benzodiazepines (BZDs) in rats is reduced after a single exposure to the elevated plus-maze test (EPM). Several hypotheses have been formulated but no conclusive explanation exists for this phenomenon called "one-trial tolerance." In this study, we examined this phenomenon further by carrying out an ethopharmacological analysis of the behavior of rats submitted to the EPM in two trials. Rats injected with saline before both trials (control), treated with 1.0 mg/kg of midazolam before both trials (MM), or only before Trial 2 (SM), were exposed to the EPM. The SM group did not differ from the controls in the Trial 1 and Trial 2 conditions. The MM group showed a clear anxioselective profile in Trial 1 and no anxiolytic-like effects in Trial 2. Whereas midazolam injected before the first trial caused no significant change in immobility, there was a pronounced increase in immobility during Trial 2 for all three conditions. These data suggest that the anxiolytic-like action of midazolam in the first trial gives way to the fear-related insensitive behaviors (phobic/avoidance responses) responsible for the one-trial tolerance to BZDs in Trial 2. Furthermore, an additional experiment showed that midazolam does not seem to affect the acquisition of the learned avoidance response since it is present upon retesting even after midazolam administration in Trial 1 (MS group). Rather, the present data suggest an emotional shift from Trial 1 to Trial 2, which leads to change in the responsiveness of the animals to BZDs. (C) 2002 Elsevier Science Inc. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Behavioral Sciences;Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0091-3057 UR - ISI:000176990600025 L2 - elevated plus-maze;midazolam;one-trial tolerance;ethological analysis;DORSAL PERIAQUEDUCTAL GRAY; ETHOPHARMACOLOGICAL ANALYSIS; ANIMAL-MODELS; ANXIETY; EXPERIENCE; CHLORDIAZEPOXIDE; VALIDATION; MECHANISMS; STATE; MICE SO - Pharmacology Biochemistry and Behavior 2002 ;72(4):973-978 5209 UI - 10662 AU - Cruz-Sampedro J AU - Herbst I AU - Martinez-Avendano R AD - Inst Ciencias Basicas & Ingn, Pachuca 42090, Hgo, MexicoUniv Virginia, Dept Math, Charlottesville, VA 22903, USAMichigan State Univ, Dept Math, E Lansing, MI 48824, USACruz-Sampedro, J, Inst Ciencias Basicas & Ingn, Pachuca 42090, Hgo, Mexico TI - Perturbations of the Wigner-Von Neumann potential leaving the embedded eigenvalue fixed AB - We investigate the Schrodinger operator H = -d(2)/dx(2) + (gamma/x) sin alphax+V, acting in L-p(R), 1 less than or equal to p < infinity, where gamma epsilon R \ {0} alpha > 0, and V epsilon L-1 (R), For \gamma\ less than or equal to 2alpha/p we show that H does not have positive eigenvalues. For \gamma\ > 2alpha/p we show that the set of functions V epsilon L-1(R), such that H has a positive eigenvalue embedded in the essential spectrum sigma(ess)(H) = (0, infinity), is a smooth unbounded sub-manifold of L-1 (R) of codimension one MH - Mexico|Hidalgo MH - USA PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 1424-0637 UR - ISI:000176980800004 L2 - ASYMPTOTIC INTEGRATION; SCHRODINGER-OPERATORS; PSEUDO-LAPLACIANS; SEMIGROUPS; SPECTRUM SO - Annales Henri Poincare 2002 ;3(2):331-345 5210 UI - 9599 AU - Cruz-Vazquez C AU - Altamira G AU - Ramos M AU - Medina L AU - Garcia-Vazquez Z AU - George J AD - INIFAP SAGAR, Jiutepec 62500, Morelos, MexicoUSDA ARS, Knipling Bushland US Livestock Insects Res Lab, Kerrville, TX 78028, USACruz-Vazquez, C, Inst Tecnol Agropecuario Aguascalientes, AP 74-2,Admon,Postal 2, Aguascalientes 20041, Mexico TI - Susceptibility of Haematobia irritans (Diptera : Muscidae) to permethrin in dairies in aguascalientes, Mexico AB - The purpose of this study was to conduct a survey for the susceptibility of the horn fly, Hematobia irritans (L.), populations to permethrin on dairy cattle from Aguascalientes, Mexico. Samples of populations of horn flies at 25 dairies were exposed to two discriminating doses (2.5 and 6.0 mug/cm(2)) on permethrin-treated filter papers and the percentage of mortality was compared with that of a susceptible strain treated with same doses of permethrin. The results show that there was a difference in the mortality from two discriminating doses and the mortality of the susceptible strain. Therefore, horn fly populations at all dairies tested in Aguascalientes, Mexico, were susceptible to permethrin. This insecticide, as well as other pyrethroids, could continue to be used to provide satisfactory control of horn flies in the study region MH - Mexico|Aguascalientes MH - Mexico|Morelos MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000179669900022 L2 - Hematobia irritans;pyrethroid susceptibility;dairy herd;Mexico;HORN FLIES; RESISTANCE SO - Journal of Medical Entomology 2002 ;39(6):939-941 5211 UI - 11915 AU - Cruz J AU - valos-Borja M AU - Cordero RL AU - Banares MA AU - Fierro JLG AU - Palacios JM AU - Agudo AL AD - CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, SpainCtr Invest Petroleo, Havana, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoUABC, Fac Ciencias Quim, Tijuana 22100, BC, MexicoAgudo, AL, CSIC, Inst Catalisis & Petroleoquim, Campus Univ Autonoma, E-28049 Madrid, Spain TI - Influence of pH of the impregnation solution on the phosphorus promotion in W/Al2O3 hydrotreating catalysts AB - W/Al2O3 and WP/Al2O3 catalysts, prepared by co-impregnation at different pH values (1.5, 7 and 9), were characterised by several techniques (XRD, TPR, Raman spectroscopy, SEM-EDX. XPS and HRTEM) and tested in the parallel hydrodesulfurization (HDS) of gas oil and hydrodenitrogenation (HDN) of pyridine. The results show that P addition, whichever the pH of the impregnation solution is, has a positive effect on HDS activity and, to a minor extent, on HDN activity. The promoter effect of P for gas oil HDS was clearly influenced by the impregnation pH, which increased substantially by decreasing the impregnation pH. This improvement in HDS activity is interpreted as a result of an increased homogeneous distribution of tungsten on alumina, formation of more polytungsten oxide species and incipient WO3 crystallites. and slightly greater sulfidation of the oxo-tungsten species, as well as a slight increase in WS2-like stacking. By contrast. the P promotion for pyridine HDN was not significantly affected by the impregnation pH. indicating that HDN activity is less sensitive to the changes in the W distribution than the HDS activity. The possible role of P in the catalytic properties of W/Al2O3 catalysts is discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Baja California MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000173486300009 L2 - supported tungsten catalysts;phosphorus promotion;impregnation pH effect;gas oil hydrodesulfurization;pyridine hydrodenitrogenation;TEMPERATURE-PROGRAMMED REDUCTION; HYDRODESULFURIZATION ACTIVITY; HYDRODENITROGENATION ACTIVITY; P-NI-W/AL2O3 CATALYSTS; AL2O3 CATALYSTS; ALUMINA; WO3/AL2O3; HYDROGENATION; NAPHTHALENE; SELECTIVITY SO - Applied Catalysis A-General 2002 ;224(1-2):97-110 5212 UI - 10747 AU - Cuchacovich R AU - Japa S AU - Huang WQ AU - Calvo A AU - Vega L AU - Vargas RB AU - Singh R AU - Flores D AU - Castro I AU - Espinoza LR AD - Louisiana State Univ, Ctr Hlth Sci, Dept Med, Sect Rheumatol, New Orleans, LA 70112, USAHosp Gen Mexico City, Mexico City, DF, MexicoUniv Peruana Cayetano Heredia, Lima, PeruEspinoza, LR, Louisiana State Univ, Ctr Hlth Sci, Dept Med, Sect Rheumatol, 1542 Tulane Ave, New Orleans, LA 70112 USA TI - Detection of bacterial DNA in Latin American patients with reactive arthritis by polymerase chain reaction and sequencing analysis AB - Objective. Bacteria and/or their antigens are thought to play a role in the pathogenesis of reactive arthritis (ReA). Polymerase chain reaction (PCR) using the 16S ribosornal RNA-PCR method was used to identify bacterial DNA in synovial fluid (SF) and tissue (ST) in a well defined group of patients with chronic ReA. In addition, species found were identified by means of sequence analysis. Methods. We examined 15 ST and 5 SF samples of 15 patients with ReA, 5 ST samples of 5 patients with osteoarthritis (OA), and 8 SF from 8 patients with closed traumatic knee injuries using a nested PCR with universal 16S rRNA primers. In addition, a nested PCR was developed to detect DNA sequences of Salmonella sp. and Myeoplasma sp. Automated sequencing and comparative data analysis (GenBank) were also performed to identify the species. Results. Bacterial DNA was identified in 8 cases, 5 ST and 3 SF; Chlamydia trachomatis (n = 2) Pseudomonas sp. (n = 3), and Bacillus cereus (n = 2) were the most common microorganisms identified. A variety of microorganisms including Clostridium sp., Lactobacillus sp.. Pseudomonas migidae, P. fluorescens, and R putida, and Neisseria meningitidis serogroup B were also identified. In half of the cases (4/8) 2 to 3 bacterial antigens were identified simultaneously. Conclusion. Bacterial DNA is present in the joints in patients with chronic ReA. A wide spectrum of bacteria including some not previously associated with ReA were identified. Further studies are needed to establish their exact role in the pathogenesis of ReA and related arthritides MH - USA MH - Mexico|Distrito Federal MH - Peru PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 14 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000176746000017 L2 - reactive arthritis;psoriatic arthritis;oligoarthritis;ankylosing spondylitis;polybacterial DNA;INFLAMMATORY BOWEL-DISEASE; SYNOVIAL-FLUID; CHLAMYDIA-TRACHOMATIS; RHEUMATIC DISEASES; HLA-B27; GUT; SPONDYLOARTHROPATHIES; IDENTIFICATION; PATHOGENESIS; SAMPLES SO - Journal of Rheumatology 2002 ;29(7):1426-1429 5213 UI - 8150 AU - Cuchacovich RS AU - Flores D AU - Gedalia A AU - Cuchacovich M AU - Marquez J AU - Singh R AU - Thompson H AU - Menon Y AU - Vincent M AD - LSU, Hlth Sci Ctr, New Orleans, LA, USAUniv Chile, Santiago, ChileUniv Autonoma Nuevo Leon, Monterrey, Mexico TI - Antinucleosome Autoantibodies in rheumatoid arthritis (RA) patients treated with methotrexate (MTX) or TNF antagonists: Prevalence, clinical and serological correlations MH - Chile MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800902 SO - Arthritis and Rheumatism 2002 ;46(9):S343-S343 5214 UI - 11221 AU - Cuervo R AU - Valencia C AU - Chandraratna RAS AU - Covarrubias L AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Genet & Fisiol Mol, Cuernavaca 62210, Morelos, MexicoAllergan, Retinoid Res, Dept Biol, Irvine, CA 92623, USAAllergan, Retinoid Res, Dept Chem, Irvine, CA 92623, USACovarrubias, L, Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Genet & Fisiol Mol, Cuernavaca 62210, Morelos, Mexico TI - Programmed cell death is required for palate shelf fusion and is regulated by retinoic acid AB - The actual role of programmed cell death (PCD) in embryonic processes and the extrinsic signals that define the death fate in developing cells are still poorly understood. Here, we show that during secondary palate shelf fusion in the mouse, PCD appeared in the medial edge epithelia (MEE) of the anterior region only after shelf contact. Contact was necessary for efficient cell death activation in the MEE. However, exogenous all-trans-retinoic acid (RA) increased cell death independently of contact. Competence to induce cell death by contact or by RA exposure was obtained when the MEE were close to touch. Endogenous RA is a relevant regulator of the secondary palate PCD since this was reduced by a retinol dehydrogenase inhibitor and an RAR specific antagonist. Bmp-7 expression was positively regulated by RA. However, BMP-7 was unable to activate cell death within the palate tissue and NOGGIN, a natural BMP antagonist, did not block PCD. Reduction of PCD at the MEE directly with a caspase inhibitor or by inhibiting retinol dehydrogenase resulted in unfused palate shelves, but adhesion was not affected. In contrast, exogenous RA also blocked fusion, but in this situation the increased cell death within the MEE appeared to affect ahesion, thereby causing cleft palate in vivo. (C) 002 Elsevier Science (USA) MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 42 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000175376400012 L2 - programmed cell death;palate development;tissue fusion;retinoic acid;CHICK LIMB DEVELOPMENT; EDGE EPITHELIAL-CELLS; CLEFT-PALATE; DIFFERENTIAL EXPRESSION; SECONDARY PALATE; MESSENGER-RNA; ALL-TRANS; APOPTOSIS; BMP-7; INHIBITION SO - Developmental Biology 2002 ;245(1):145-156 5215 UI - 10953 AU - Cuesta-Rubio O AU - Frontana-Uribe BA AU - Ramirez-Apan T AU - Cardenas J AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv La Habana, Inst Farm & Alimentos, Havana 13600, CubaCardenas, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Polyisoprenylated benzophenones in Cuban propolis; Biological activity of nemorosone AB - The Copey tree (Clusia rosea) has a large distribution in Cuba and its floral resin is a rich source of polyisoprenylated benzophenones. To determine the presence of these natural products, we carried out a study by HPLC of 21 propolis samples produced by honey bees (Apis mellifera) from different provinces of Cuba. Nemorosone resulted to be the most abundant polyisoprenylated benzophenone and the mixture of xanthochymol and guttiferone E was also observed, but in minor proportion. We studied the biological activity of the pure natural product nemorosone and its methyl derivatives. We found that nemorosone has cytotoxic activity against epitheloid carcinoma (HeLa), epidermoid carcinoma (Hep-2), prostate cancer (PC-3) and central nervous system cancer (U251). It also exhibited antioxidant capacity. Methylated nemorosone exhibited less biological activity than the natural product MH - Cuba MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000175998100029 L2 - propolis;prenylated benzophenones;nemorosone;FLORAL RESINS; CHEMICAL-COMPOSITION; CLUSIA-ROSEA SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2002 ;57(3-4):372-378 5216 UI - 10348 AU - Cuevas-Jimenez A AU - Ardisson PL AU - Condal AR AD - IPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoUniv Laval, Dept Sci Geomat, Quebec City, PQ G1K 7P4, CanadaCuevas-Jimenez, A, IPN, CINVESTAV, Unidad Merida, Antigua Carretera Progreso,Km 6 Apdo Postal 73-Co, Merida 97310, Yucatan, Mexico TI - Mapping of shallow coral reefs by colour aerial photography AB - True-colour aerial photography and underwater photography together with digital image processing techniques were applied to identify and describe the spatial array of the main bottom elements of two common reef environments: a stony coral assemblage and a seagrass bed. The procedure adopted consisted of generating an unsupervised classification, coupled with field verification, and then a supervised classification. This method permitted the generation of stony corals and seagrass distribution maps; the spatial resolution of these maps is of the order of 40 cm. Limitations and potentiality of the method to high-resolution mapping of shallow coral reef environments are discussed MH - Canada MH - Mexico|Yucatan PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0143-1161 UR - ISI:000177859700012 SO - International Journal of Remote Sensing 2002 ;23(18):3697-3712 5217 UI - 11438 AU - Cuevas G AU - Renugopalakrishnan V AU - Madrid G AU - Hagler AT AD - Harvard Univ, Sch Med, Childrens Hosp, Boston, MA 02115, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBioFold Inc, San Jose, CA 95129, USADiscovery Partners Int, San Diego, CA 92121, USARenugopalakrishnan, V, Harvard Univ, Sch Med, Childrens Hosp, 300 Longwood Ave, Boston, MA 02115 USA TI - Density function studies of peptides - Part I. Vibrational frequencies including isotopic effects and NMR chemical shifts of N-methylacetamide, a peptide model, from density function and MP2 calculations AB - Isotopic effects on vibrational frequencies and chemical shifts of N-methylacetamide (NMA) are of significance to the further development of multi-dimensional NMR and IR studies in protein structural biology. Density functional theory (DFT) has proven to be a powerful method for the calculation of molecular structure, conformation, and torsional barriers for small molecules. In the first part of the paper we demonstrate that DFT reproduces experimentally observed geometries, conformation, and torsional barriers before we proceed to a discussion of chemical shifts in NMA, whose accurate calculation has been made possible by sum-over-states density functional perturbation theory. There is good agreement between the calculated proton and carbon chemical shifts of NMA and the experimentally derived values of the same in DMSO-d(6). We have used gradient corrected non-local functional BPW91/6-31 G(d,p) for the calculation of vibrational frequencies of NMA and the effect of H-2, C-13, N-15 isotopic effects. The unscaled calculated vibrational frequencies of NMA are in agreement with the gas-phase vibrational frequencies of NMA obtained from electron diffraction of NMA at low temperatures in an inert matrix. The results presented in this paper auger well for the application of DFT to di-, tri, and larger peptides and we have such studies in progress in our laboratories MH - USA MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Review AV - English IS - 1463-9076 UR - ISI:000174796000037 L2 - MOLECULAR ORBITAL CALCULATIONS; EXCHANGE-ENERGY; ELECTRON-DENSITIES; UVRR SPECTROSCOPY; AB-INITIO; H-BOND; AMIDE; ABINITIO; GRADIENT; TRANS SO - Physical Chemistry Chemical Physics 2002 ;4(8):1490-1499 5218 UI - 11476 AU - cuna-Soto R AU - Stahle DW AU - Cleaveland MK AU - Therrell MD AD - Univ Arkansas, Tree Ring Lab, Dept Geosci, Fayetteville, AR 72701, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoStahle, DW, Univ Arkansas, Tree Ring Lab, Dept Geosci, Ozark Hall 113, Fayetteville, AR 72701 USA TI - Megadrought and megadeath in 16th century Mexico AB - The native population collapse in 16th century Mexico was a demographic catastrophe with one of the highest death rates in history. Recently developed tree-ring evidence has allowed the levels of precipitation to be reconstructed for north central Mexico, adding to the growing body of epidemiologic evidence and indicating that the 1545 and 1576 epidemics of cocoliztli (Nahuatl for "pest") were indigenous hemorrhagic fevers transmitted by rodent hosts and aggravated by extreme drought conditions MH - USA MH - Mexico|Distrito Federal PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 20 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000174832700004 SO - Emerging Infectious Diseases 2002 ;8(4):360-362 5219 UI - 10193 AU - Curiel F AU - Vargas WE AU - Barrera RG AD - COMEX, Ctr Invest Polimeros, Tepexpan 55885, Estado De Mexic, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Costa Rica, Excuela Fis, San Jose 2060, Costa RicaUniv Costa Rica, Ctr Invest Ciencia & Ingn Mat, San Jose 2060, Costa RicaCuriel, F, COMEX, Ctr Invest Polimeros, Marcos Achar Lobaton 2, Tepexpan 55885, Estado De Mexic, Mexico TI - Visible spectral dependence of the scattering and absorption coefficients of pigmented coatings from inversion of diffuse reflectance spectra AB - A spectral-projected gradient method and an extension of the Kubelka-Munk theory are applied to obtain the relevant parameters of the theory from measured diffuse reflectance spectra of pigmented samples illuminated with visible diffuse radiation. The initial estimate of the spectral dependence of the parameters, required by a recursive spectral-projected gradient method, was obtained by use of direct measurements and up-to-date theoretical estimates. We then tested the consistency of the Kubelka-Munk theory by repeating the procedure with samples of different thicknesses. (C) 2002 Optical Society of America MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000178292800021 L2 - KUBELKA-MUNK THEORY; APPLICABILITY; THICKNESS; PARTICLES; PAINTS; FILMS SO - Applied Optics 2002 ;41(28):5969-5978 5220 UI - 12055 AU - Curiel S AU - Trinidad MA AU - Canto J AU - Rodriguez LF AU - Torrelles JM AU - Ho PTP AU - Patel NA AU - Greenhill L AU - Gomez JF AU - Garay G AU - Hernandez L AU - Contreras ME AU - Anglada G AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USALab Astrofis Espacial & Fis Fundamental INTA, E-28080 Madrid, SpainUniv Chile, Dept Astron, Santiago, ChileCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainCuriel, S, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Detection of a candidate for the exciting source of the expanding water maser bubble in Cepheus A AB - We report sensitive, high angular resolution VLA 3.6 cm and 7 mm continuum observations toward the star-forming region Cepheus A. Three embedded young stellar objects (YSOs) were found within a projected area of similar or equal to 0".6 x 0".6 (400x400 AU(2)). One of the sources is the already known radio continuum jet HW2 (detected at 3.6 cm and 7 mm), while the other two weak sources were not previously known. One of these two new sources is detected only at 7 mm and is located similar or equal to0".15 south from HW2. The other source, detected only at 3.6 cm, is located 0".6 south from HW2 and nearly coincides with the center of the enigmatic expanding bubble of water masers recently detected with the Very Long Baseline Array. We suggest that this radio continuum source is the embedded YSO powering the water maser structure, but its nature is still unknown at present. We also discuss possible scenarios that could explain the surprisingly precise spherical geometry of the water maser bubble MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173154400009 L2 - ISM : individual (Cepheus A);ISM : jets and outflows;radio continuum : ISM;stars : formation;THERMAL RADIO JET; A HW2 SO - Astrophysical Journal 2002 ;564(1):L35-L38 5221 UI - 9092 AU - Currie CA AU - Hyndman RD AU - Wang K AU - Kostoglodov V AD - Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC, CanadaGeol Survey Canada, Pacific Geosci Ctr, Sidney, BC V8L 4B2, CanadaNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCurrie, CA, Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC, Canada TI - Thermal models of the Mexico subduction zone: Implications for the megathrust seismogenic zone AB - [1] It has been proposed that the seismogenic zone of subduction thrust faults is primarily controlled by temperature or rock composition changes. We have developed numerical models of the thermal structure of the Mexico subduction zone to examine the factors that affect the temperature of the subduction thrust fault. Although the oceanic plates subducting beneath Mexico are young, the top of the oceanic plate at the trench is cool, because of the lack of a thick cover of insulating sediments. Marine heat flow observations suggest that hydrothermal circulation may further cool the oceanic plate. This results in a cool subduction thrust fault, where the brittle part of the fault extends to depths of over 40 km. At these depths, even slight frictional heating may have significant effects on temperature along the thrust fault, particularly for regions with a high convergence rate and shallow plate dip. With the addition of a small amount of frictional heating, the temperatures of the deep (30-40 km) thrust fault are increased by over 200 degreesC. As the observed downdip limit of rupture in recent well-constrained megathrust earthquakes is confined to depths above the intersection of the thrust fault and the continental Moho, a temperature of 350 degreesC may control the downdip extent of the seismogenic zone. Thus, in order to be consistent with the observed shallow rupture areas, it is necessary to include a small amount of frictional heating, corresponding to an average shear stress of 15 MPa MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000181227300005 L2 - thermal models;subduction zone;megathrust earthquakes;seismogenic zone;heat flow;Mexico subduction zone;NORTH-AMERICAN PLATES; 1995 COLIMA-JALISCO; SOUTHERN MEXICO; RIVERA PLATE; HEAT-FLOW; CURRENT DEFORMATION; THRUST EARTHQUAKES; CONVERGENT MARGIN; SLIP DISTRIBUTION; SOUTHWEST JAPAN SO - Journal of Geophysical Research-Solid Earth 2002 ;107(B12): 5222 UI - 11329 AU - Cvetic M AU - Nojiri S AU - Odintsov SD AD - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104, USANatl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanTomsk State Pedag Univ, Tomsk 634041, RussiaUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoCvetic, M, Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104, USA TI - Black hole thermodynamics and negative entropy in de Sitter and anti-de Sitter Einstein-Gauss-Bonnet gravity AB - We investigate the charged Schwarzschild-anti-de Sitter (SAdS) BH thermodynamics in 5d Einstein-Gauss-Bonnet gravity with electromagnetic field. The Hawking-Page phase transitions between SAdS BH and pure AdS space are studied. The corresponding phase diagrams (with critical line defined by GB term coefficient and electric charge) are drawn. The possibility to account for higher derivative Maxwell terms is mentioned. In frames of proposed dS/CFT correspondence it is demonstrated that brane gravity maybe localized similarly to AdS/CFT. SdS 1314 thermodynamics in 5d Einstein and Einstein-Gauss-Bonnet gravity is considered. The corresponding (complicated) surface counterterms are found and used to get the conserved BH mass, free energy and entropy. The interesting feature of higher derivative gravity is the possibility for negative (or zero) SdS (or SAdS) 1314 entropy which depends on the parameters of higher derivative terms. We speculate that the appearance of negative entropy may indicate a new type instability where a transition between SdS (SAdS) BH with negative entropy to SAdS (SdS) BH with positive entropy would occur. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 105 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000175111900011 L2 - HIGHER-DERIVATIVE GRAVITY; ADS SUPERGRAVITY; SPACE; BRANE; CFT SO - Nuclear Physics B 2002 ;628(1-2):295-330 5223 UI - 10797 AU - Daessle LW AU - Cronan DS AD - Univ London Imperial Coll Sci Technol & Med, TH Huxley Sch Environm Earth Sci & Engn, London SW7 2BP, EnglandDaessle, LW, Univ Autonoma Baja California, Inst Invest Oceanol, Apdo 453, Ensenada 22800, Baja California, Mexico TI - Late Quaternary hydrothermal sedimentation adjacent to the Central Lau Spreading Center AB - The partition geochemistry of 10 sediment cores collected adjacent to the southward-propagating Central Lau Spreading Center (CLSC) has been studied. The hydrothermal oxide component in these sediments is mainly formed of Mn oxides containing other hydrothermally associated elements (e.g., Fe, Zn, Cu, Mo and Pb). The Mn oxides represent distal plume fall-out derived from hydrothermal vents. Hydrothermal Mn accumulation rates are between 2.6 and 74.4 mg cm(-2) ka(-1) during the 0-30-ka period and between 2.1 and 12.8 mg cm(-2) ka(-1) during the 30-120-ka period. Recent (< 30 ka) hydrothermal input to the sediments adjacent to the CLSC has been more variable than in the older sediments from the area. This may be attributed to localised hydrothermal activity occurring behind the propagator, and possibly to magma chamber development. Periods of enhanced hydrothermal input from the CLSC at ca. 30 ka and 175 ka appear to be contemporaneous along the CLSC; however, an enrichment in Mn at ca. 112 ka probably represents distal hydrothermal plume fall-out from increased activity on the Valu Fa Ridge in the southern Lau Basin. Hydrothermal Mn input derived from the CLSC is below that from the VFR. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0025-3227 UR - ISI:000176422800010 L2 - hydrothermal sediments;geochemistry;Central Lau Spreading Center;Lau Basin;Mn oxides;BACK-ARC BASIN; METAL ACCUMULATION RATES; EAST PACIFIC RISE; METALLIFEROUS SEDIMENTS; SW PACIFIC; PELAGIC SEDIMENTS; GEOCHEMISTRY; 26-DEGREES-N; RIDGE; MN SO - Marine Geology 2002 ;182(3-4):389-404 5224 UI - 10907 AU - Daessle LW AU - Ramos SE AU - Carriquiry JD AU - Camacho-Ibar VF AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoDaessle, LW, PMB 133,POB 189003, Coronado, CA 92178, USA TI - Clay dispersal and the geochemistry of manganese in the Northern Gulf of California AB - The regional distribution of Fe and Mn in bulk sediments, and in different geochemical fractions, has been determined in surficial sediments from the Northern Gulf of California. The regional distribution of Fe (0.35-2.83%) and Mn (97-922 mug g(-1)) in the sediments is mainly controlled by the distribution of fine-grained particles. Unlike silt (4-62.5 mum), clay (< 4 μm) in the NGC is mainly derived from the eroding Colorado River Delta and transported southward adjacent to the Baja California coast, making up to 50% of the sediments. Normalisation of Fe and Mn against the relative abundance of clay indicates that the main source of these metals toward the Central Gulf of California is the re-suspension and re-deposition of the estuarine sediments derived from the Colorado River Delta. Iron and Mn correlate statistically; their concentrations are similar to other coastal sediments in Baja California and in seston from the Colorado River Delta. While the partition geochemistry of Fe suggests a dominant association of this element with the lithogenic phases throughout the NGC, Mn is significantly partitioned in the exchangeable (average 15%) and carbonate (average 32%) sediment phases, especially in clayey sediments derived from the estuarine region. The influence of Colorado River Delta-derived exchangeable Mn extends at least as far as the central Tiburon Basin, being probably responsible for the anomalously high Mn concentrations found in near-bottom waters in the Central Gulf of California. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Oceanography U5 - J;Article AV - English IS - 0278-4343 UR - ISI:000176272000003 L2 - gulf of California;Colorado River;sediment;geochemistry;manganese;iron;OF-CALIFORNIA; SEDIMENTS; ESTUARINE; METALS; CIRCULATION; SPECIATION; DIAGENESIS; DISCHARGE; WATER SO - Continental Shelf Research 2002 ;22(9):1311-1323 5225 UI - 11823 AU - Davies FT AU - Olalde-Portugal V AU - guilera-Gomez L AU - Alvarado MJ AU - Ferrera-Cerrato RC AU - Boutton TW AD - Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843, USAColegio Postgrad, Montecillo, MexicoTexas A&M Univ, Dept Rangeland Ecol & Management, College Stn, TX 77843, USACINVESTAV, Inst Plant Biol, Dept Biochem & Biotechnol, Irapuato, MexicoDavies, FT, Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843, USA TI - Alleviation of drought stress of Chile ancho pepper (Capsicum annuum L. cv. San Luis) with arbuscular mycorrhiza indigenous to Mexico AB - Selecting indigenous mycorrhizal fungi that enhance plant water status is important in Mexico for sustainable production systems of Chile ancho pepper (Capsicum annuum L. cv. San Luis). To determine mycorrhizal enhancement of drought resistance, plants were either non-inoculated (NonAMF), or inoculated with arbuscular mycorrhizal fungi (AMF): Glomus fasciculatum and a mixed Glomus spp, from Mexico (ZAC-19). Plants were then exposed to a 20-day drought cycle. To equalize growth and minimize tissue-P differences, NonAMF plants received higher P than AMF plants. Drought reduced leaf water potential tissue relative water content (RWC), stomatal conductance (g(s)), whole plant transpiration (mg H2O m(-2) s(-1)), leaf transpirational surface area and plant biomass. Only plants colonized with ZAC-19 had enhanced drought resistance, as indicated by higher Psi(leaf) and fewest plants with visible wilting during peak drought stress. A higher root/shoot ratio occurred with ZAC-19 plants (despite equal total plant biomass among droughted plants), which may have also contributed to drought resistance. Drought enhanced arbuscule formation and hyphae development of ZAC-19, while reducing colonization of G. fasciculatum. Tissue P was not a contributing factor to drought resistance. AMF did not enhance water-use efficiency (WUE) as-determined gravimetric ally on a whole plant basis (g carbon/kg H2O) or by carbon isotope discrimination (Delta). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Horticulture U5 - J;Article AV - English IS - 0304-4238 UR - ISI:000173641400014 L2 - arbuscular mycorrhiza;carbon isotope discrimination;drought resistance;water-use efficiency;EXTRARADICAL HYPHAE; WATER RELATIONS; VA MYCORRHIZAL; ROSE PLANTS; ACCLIMATION; CONDUCTANCE; RESISTANCE; ROOTS SO - Scientia Horticulturae 2002 ;92(3-4):347-359 5226 UI - 11464 AU - Davies SJ AU - Metcalfe SE AU - Caballero ME AU - Juggins S AD - Univ Edinburgh, Dept Geog, Edinburgh EH8 9XP, Midlothian, ScotlandUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Newcastle Upon Tyne, Dept Geog, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandDavies, SJ, Univ Edinburgh, Dept Geog, Drummond St, Edinburgh EH8 9XP, Midlothian, Scotland TI - Developing diatom-based transfer functions for Central Mexican lakes AB - This paper is the first attempt to produce diatom-based transfer functions for the northern tropical Americas. A dataset of 53 modern diatom samples and associated hydrochemical variables from 31 sites in the volcanic highlands of central Mexico is presented. The relationship between diatom species distribution and water chemistry is explored using canonical correspondence analysis (CCA) and partial CCA. Variance partitioning indicates that ionic strength and ion type both account for significant and independent portions of this variation. Transfer functions are developed for electrical conductivity (r(2) = 0.91) and alkalinity (as a percentage of total anions) (r(2) = 0.90), reflecting ionic strength and ionic composition respectively. Prediction errors, estimated using jack-knifing, are low for the conductivity model, but the carbonate transfer function performs less well. This study highlights the potential for diatom-based quantitative palaeoenvironmental reconstructions in central Mexico. However, a number of key diatom species found in fossil material are not represented in the modern flora. Sampling of additional sites may resolve this, but it is thought that the lack of modern analogues may reflect the high degree of anthropogenic disturbance in many of the catchments. This highlights the problem of trying to reconstruct pre-disturbance environmental changes in highly modified ecosystems. One possible solution is to merge the central Mexican data with the African dataset, which includes sites of similar chemical composition, but which have not suffered the same degree of disturbance MH - Mexico|Distrito Federal MH - United Kingdom PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000174759600018 L2 - Mexico;diatoms;palaeolimnology;transfer function;CCA;WATER CHEMISTRY; CLIMATE-CHANGE; SALINITY; ASSEMBLAGES; RECONSTRUCTION; FLUCTUATIONS; BASIN; PH SO - Hydrobiologia 2002 ;467(1-3):199-213 5227 UI - 10078 AU - Dawson DA AU - Gorostiza LG AU - Li ZH AD - Carleton Univ, Sch Math & Stat, Ottawa, ON K1S 5B6, CanadaCtr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoBeijing Normal Univ, Dept Math, Beijing 100875, Peoples R ChinaCtr Invest Matemat, Guanajuato, MexicoCarleton Univ, Ottawa, ON K1S 5B6, CanadaDawson, DA, Carleton Univ, Sch Math & Stat, 1125 Colonel Dr, Ottawa, ON K1S 5B6, Canada TI - Nonlocal branching superprocesses and some related models AB - A new formulation of nonlocal branching superprocesses is given from which we derive as special cases the rebirth, the multitype, the mass-structured, the multilevel and the age-reproduction-structured superprocesses and the superprocess-controlled immigration process. This unified treatment simplifies considerably the proof of existence of the old classes of superprocesses and also gives rise to some new ones MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000178532700005 L2 - superprocess;nonlocal branching;rebirth;multitype;mass-structured;multilevel;age-reproduction structured;superprocess-controlled immigration;PERSISTENCE; IMMIGRATION; BEHAVIOR; MOTION SO - Acta Applicandae Mathematicae 2002 ;74(1):93-112 5228 UI - 11284 AU - day-Sanz V AU - Roque A AU - Turnbull JF AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandCtr Aquaculture Serv, Diagnost Unit, Guayaquil, EcuadorCtr Invest Alimentac & Desarrollo, Mazatlan, Sinaloa, MexicoTurnbull, JF, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - Clearing mechanisms of Vibrio vulnificus biotype I in the black tiger shrimp Penaeus monodon AB - Vibrio species' infections are a common sequelae to environmental stress or other disease processes in shrimp, but the mechanism by which the shrimp eliminate the bacteria is poorly understood. In this study, the penetration, fate and the clearing of V. vulnificus were investigated in Penaeus monodon. A bacterial disease isolate from a shrimp farm was identified as V. vulnificus biotype I. Polyclonal antiserum was raised in rabbits against the bacterium and the specificity was verified by ELISA and immunoblot against a range of Vibrio spp. and other Gram-negative bacteria. The bacteria were then administered to R monodon juveniles by injection, immersion and oral intubation. An indirect immunoperoxidase technique was employed in a time course study to follow the bacteria and bacterial antigens in the tissue of the shrimp. Bacteria were cleared by a common route, regardless of the method of administration. Observations in immersion challenge were similar to a combination of those for oral and injection challenges. With immersion, bacteria entered the shrimp through damaged cuticle or via insertion points of cuticular setae, Shortly after entry, whole bacterial cells were. observed in the haemolymph and connective tissue, They were either phagocytosed by haemocytes, or broken down outside host cells. Haemocytes containing bacterial cells or antigens (HCB) were observed in the connective tissue and haemolymph, HCB accumulated around the hepatopancreas, midgut, midgut-caecum, gills, heart and lymphoid organ. Free bacterial antigens also accumulated in the heart and lymphoid organ. Bacteria entering through the mouth by oral intubation or immersion were broken down so that only soluble or very fine particles entered the hepatopancreas. Bacterial antigens passed through the hepatopancreas into the haemolymph. Antigens were initially observed in the haemolymph sinuses and subsequently accumulated in the heart and lymphoid organ. Bacterial antigens were released from the shrimp, initially through the gills and subsequently through hepatopancreatic B-cells, branchial podocytes and sub-cuticular podocytes MH - Ecuador MH - Mexico|Sinaloa MH - United Kingdom PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 15 U4 - Fisheries;Veterinary Sciences U5 - J;Article AV - English IS - 0177-5103 UR - ISI:000175341500002 L2 - shrimp;Vibrio;Penaeus monodon;BACTERIAL DISEASE; B-CELLS; HEPATOPANCREAS; VANNAMEI SO - Diseases of Aquatic Organisms 2002 ;48(2):91-99 5229 UI - 10553 AU - de-Bashan LE AU - Moreno M AU - Hernandez JP AU - Bashan Y AD - Environm Biol Ctr Biol Res NW CIB, La Paz 23000, BCS, MexicoPontificia Univ Javeriana, Dept Biol, Santafe De Bogota, ColombiaBashan, Y, Environm Biol Ctr Biol Res NW CIB, POB 218, La Paz 23000, BCS, Mexico TI - Removal of ammonium and phosphorus ions from synthetic wastewater by the microalgae Chlorella vulgaris coimmobilized in alginate beads with the microalgae growth-promoting bacterium Azospirillum brasilense AB - Coimmobilization of the freshwater microalga Chlorella vulgaris in alginate beads with the microalgae growth-promoting bacterium Azospirillum brasilense under semi-continuous synthetic wastewater culture conditions significantly increased the removal of ammonium and soluble phosphorus ions compared to immobilization of the microalgae alone. In continuous or batch cultures removal of these ions followed a similar trend but was less efficient than in semi-continuous culture. It is proposed that coimmobilization of a microalgae with microalgae growth-promoting bacteria can serve as a tool in devising novel wastewater treatments. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Colombia MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000177109900002 L2 - ammonium and phosphorus removal;microbial immobilization;microalgae;plant growth-promoting bacteria;wastewater treatment;WATER NUTRIENT REMOVAL; PLANT-GROWTH; PHYLLOBACTERIUM-MYRSINACEARUM; CARRAGEENAN; CELLS; ENHANCEMENT; NITROGEN; ALGAE; SOIL SO - Water Research 2002 ;36(12):2941-2948 5230 UI - 10597 AU - de-Bashan LE AU - Bashan Y AU - Moreno M AU - Lebsky VK AU - Bustillos JJ AD - Ctr Biol Res NW CIB, La Paz 23000, Baja Calif Sur, MexicoPontificia Univ Javeriana, Dept Biol, Bogota, ColombiaBashan, Y, Ctr Biol Res NW CIB, POB 128, La Paz 23000, Baja Calif Sur, Mexico TI - Increased pigment and lipid content, lipid variety, and cell and population size of the microalgae Chlorella spp. when co-immobilized in alginate beads with the microalgae-growth-promoting bacterium Azospirillum brasilense AB - Three strains of the freshwater microalgae used for wastewater treatment, Chlorella vulgaris and Chlorella sorokiniana co-immobilized separately in alginate beads with the microalgae-growth-promoting bacterium Azospirillum brasilense Cd, resulted in significant changes in microalgal-population size, cell size, cell cytology, pigment, lipid content, and the variety of fatty acids produced in comparison with microalgae immobilized in alginate without the bacterium. Cells of C. vulgaris UTEX 2714 did not change in size, but the population size within the beads significantly increased. On the other hand, C. vulgaris UTEX 395 cells grew 62% larger, but their numbers did not increase. The population of C. sorokiniana UTEX 1602 increased, but not their cell size. The content of pigments chlorophyll a and b, lutein, and violoaxanthin increased in all microalgal species. The lipid content also significantly increased in all three strains, and the number of different fatty acids in the microalgae increased from four to eight. This study indicates that the microalgae-growth-promoting bacterium induced significant changes in the metabolism of the microalgae MH - Colombia MH - Mexico|Baja California Sur PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000177192200004 L2 - alginate;Azospirillum;Chlorella;bacterial immobilization;microalgae;wastewater;WATER NUTRIENT REMOVAL; PLANT-GROWTH; WASTE-WATER; PHYLLOBACTERIUM-MYRSINACEARUM; VULGARIS; ENHANCEMENT; ALGAE SO - Canadian Journal of Microbiology 2002 ;48(6):514-521 5231 UI - 10685 AU - De-Miguel FF AU - Muller KJ AU - Adams WB AU - Nicholls JG AD - UNAM, Inst Fisiol Celular, Dept Biofis, Mexico City 04510, DF, MexicoUniv Miami, Sch Med, Dept Physiol & Biophys, Miami, FL 33136, USAUniv Miami, Sch Med, Neurosci Program, Miami, FL 33136, USASISSA, Dept Biophys, I-34014 Trieste, ItalyDe-Miguel, FF, UNAM, Inst Fisiol Celular, Dept Biofis, Apartado Postal 70-253, Mexico City 04510, DF, Mexico TI - Axotomy of single fluorescent nerve fibers in developing mammalian spinal cord by photoconversion of diaminobenzidine AB - A technique has been developed for cutting single nerve fibers in mammalian spinal cord. In the presence of diaminobenzidine (DAB), a laser microbeam was applied to carbocyanine (Di1) stained sensory fibers in cultured spinal cords of the newly born opossum Monodelphis domestica. Digital images of fluorescent fibers were acquired with an intensified video CCD-camera coupled to an image processor. Laser illumination of two spots on a fiber in the presence of 3 mg/ml DAB cut it, so that following DAB wash out, Di1 fluorescence did not return after the intermediate segment was bleached. In contrast, when a similar procedure was carried out without DAB, fluorescence of the bleached segment was recovered within minutes in darkness, by dye diffusion from adjacent regions of the uncut fiber. After exposure to DAB, through-conduction of compound action potentials continued in undamaged fibers. The DAB reaction product remained as a dark precipitate,, helping to localize the lesion sites. By illuminating a continuous series of spots it was possible to cut whole nerve roots. Fluorescent fibers extended across the cut segment 24 h later. With minor modifications, the procedure described here allows a precise lesioning of single fibers within an intact nervous system. (C) 2002 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Neurosciences U5 - J;Article AV - English IS - 0165-0270 UR - ISI:000176921700008 L2 - axotomy;single fiber;regeneration;spinal cord;opossum;laser ablation;MONODELPHIS-DOMESTICA; ELECTRON-MICROSCOPY; PERIPHERAL AXOTOMY; NEURITE OUTGROWTH; NEWBORN OPOSSUM; NEUROPEPTIDE-Y; NEURONS; LIGHT; SYSTEM; GROWTH SO - Journal of Neuroscience Methods 2002 ;117(1):73-79 5232 UI - 11700 AU - de Arenas JL AU - Castanos-Lomnitz H AU - renas-Licea J AD - Natl Autonomous Univ Mexico, Fac Philosophy & Letters, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Econ Res, Mexico City 04510, DF, MexicoUniv Coll London, Dept Biochem & Mol Biol, London, Englandde Arenas, JL, Natl Autonomous Univ Mexico, Fac Philosophy & Letters, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Significant Mexican research in the health sciences: A bibliometric analysis AB - In the 1970s Mexico started to consolidate its S&T system by training human resources and,actively preventing brain drain, mainly by motivating researchers through economic incentives. Considering Bradford's Law, an analysis of significant Mexican research in the health sciences, i.e., papers published in journals with a high-impact factor which grant a degree of credibility and importance was carried out, Significant papers produced in Mexico show a measure of the country's productivity, and these papers' citations measure the country's international impact MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Interdisciplinary Applications;Information Science & Library Science U5 - J;Article AV - English IS - 0138-9130 UR - ISI:000174044500003 SO - Scientometrics 2002 ;53(1):39-48 5233 UI - 9497 AU - De Blas G AU - Michaut M AU - Trevino CL AU - Tomes CN AU - Yunes R AU - Darszon A AU - Mayorga LS AD - Univ Nacl Cuyo, Lab Biol Celular & Mol, Inst Histol & Embriol,IHEM, CONICET,Fac Ciencias Med, RA-5500 Mendoza, ArgentinaUniv Nacl Autonoma Mexico, Dept Genet & Fisiol Mol, Inst Biotechnol, Cuernavaca 62250, Morelos, MexicoMayorga, LS, Casilla Correo 56, RA-5500 Mendoza, Argentina TI - The intraacrosomal calcium pool plays a direct role in acrosomal exocytosis AB - The acrosome reaction is a unique type of regulated exocytosis. The single secretory granule of the sperm fuses at multiple points with the overlying plasma membrane. In the past few years we have characterized several aspects of this process using streptolysin O-permeabilized human spermatozoa. Here we show that Rab3A triggers acrosomal exocytosis in the virtual absence of calcium in the cytosolic compartment. Interestingly, exocytosis is blocked when calcium is depleted from intracellular stores. By using a membrane-permeant fluorescent calcium probe, we observed that the acrosome actually behaves as a calcium store. Depleting calcium from this compartment by using a light-sensitive chelator prevents secretion promoted by Rab3A. LTV inactivation of the chelator restores exocytosis. Rab3A-triggered exocytosis is blocked by calcium pump and inositol 1,4,5-trisphosphate (IP3)-sensitive calcium channel inhibitors. Calcium measurements inside and outside the acrosome showed that Rab3A promotes a calcium efflux from the granule. Interestingly, release of calcium through IP3-sensitive calcium channels was necessary even when exocytosis was initiated by increasing free calcium in the extraacrosomal compartment in both permeabilized and intact spermatozoa. Our results show that a calcium efflux from the acrosome through IP3-sensitive channels is necessary downstream Rab3A activation during the membrane fusion process leading to acrosomal exocytosis MH - Argentina MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 36 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000180028900029 L2 - INOSITOL 1,4,5-TRISPHOSPHATE RECEPTORS; GTP-BINDING PROTEIN; MOUSE SPERM; HUMAN SPERMATOZOA; MEMBRANE-FUSION; ZONA-PELLUCIDA; EGG ZP3; RAB3A; CA2+; SYNAPTOTAGMIN SO - Journal of Biological Chemistry 2002 ;277(51):49326-49331 5234 UI - 12058 AU - De Buizer JM AU - Watson AM AU - Radomski JT AU - Pena RK AU - Telesco CM AD - Natl Opt Astron Observ, Cerro Tololo Interamer Observ, La Serena, ChileUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Florida, Dept Astron, Gainesville, FL 32601, USADe Buizer, JM, Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile TI - Mid-infrared detection of a hot molecular core in G29.96-0.02 AB - We present high angular resolution ( 0".5) 10 and 18 m m images of the region around G29.96-0.02 taken from the Gemini North Observatory 8 m telescope using the mid-infrared imager and spectrometer OSCIR. These observations were centered on the location of a group of water masers, which delineate the site of a hot molecular core believed to contain an extremely young massive star. We report here the direct detection of a hot molecular core at mid-infrared wavelengths at this location. The size and extent of the core at 18 m m appears to be very similar to the morphology as seen in integrated NH3 maps. However, our observations indicate that the mid-infrared emission may not be exactly coincident with the NH3 emission MH - Chile MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173167300011 L2 - infrared : ISM;ISM : individual (G29.96-0.02);stars : early-type;stars : formation;II REGION G29.96-0.02; METHANOL MASERS; MASSIVE STARS; HII-REGIONS; LINE SO - Astrophysical Journal 2002 ;564(2):L101-L104 5235 UI - 10805 AU - de Daruvar A AU - Collado-Vides J AU - Valencia A AD - CSIC, CNB, Prot Design Grp, E-28049 Madrid, SpainCSIC, INTA, Ctr AstroBiol, E-28049 Madrid, SpainUNAM, Ctr Invest Fijac Nitrogeno, Program Computat Biol, Cuernavaca, Morelos, MexicoLION BIOSCI AG, Heidelberg, GermanyValencia, A, CSIC, CNB, Prot Design Grp, E-28049 Madrid, Spain TI - Analysis of the cellular functions of Escherichia coli operons and their conservation in Bacillus subtilis AB - The common assumption of operons as composed of genes that cooperate in a biological process is confirmed here by showing that Escherichia coli operons tend to be composed of genes that belong to the same general class of cellular function. Furthermore, the comparison between the genomic organization of E. coli and that of Bacillus subtilis shows that the genes that are homologous to genes that belong to experimentally characterized E. coli operons tend to cluster in neighboring regions of the genome. This tendency is greater for the subset of E. coli operons whose genes belong to a single functional class. These observations indicate strong evolutionary pressure that, translated into functional constraints, leads to the inclusion of many essential functions in conserved operons and clusters in these two distant species MH - Germany MH - Mexico|Morelos MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0022-2844 UR - ISI:000176691400008 L2 - genome comparisons;gene order;operons;Escherichia coli;Bacillus subtilis;classes of cell function;COMPLETE GENOME SEQUENCE; TRANSCRIPTIONAL REGULATION; SELFISH OPERONS; GENE CLUSTERS; K-12; EVOLUTION; PROTEINS SO - Journal of Molecular Evolution 2002 ;55(2):211-221 5236 UI - 10041 AU - de Haro ML AU - Yuste SB AU - Santos A AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Extremadura, Dept Fis, E-06071 Badajoz, Spainde Haro, ML, UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Equation of state of additive hard-disk fluid mixtures: A critical analysis of two recent proposals AB - A detailed analysis of two different theoretical equations of state for a binary mixture of additive hard disks [C. Barrio and J. R. Solana, Phys. Rev. E 63, 011201 (2001); A. Santos, S. B. Yuste, and M. Lopez de Haro, Mol. Phys. 96, 1 (1999)], including their comparison with Monte Carlo results, is carried out. It is found that both proposals, which require the equation of state of the single-component system as input, lead to comparable accuracy when the same input is used in both, but that advocated by Santos is simpler and complies with the exact limit in which the small disks are point particles MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000178623300013 L2 - VIRIAL-COEFFICIENTS; SPHERE FLUID; PHASE SO - Physical Review e 2002 ;66(3): 5237 UI - 9604 AU - de la Fuente D AU - Morcillo M AU - Simancas J AU - Hernandez LS AU - Ruiz JL AD - Natl Ctr Met Res, CENIM, Madrid 28040, SpainUASLP, Inst Met, San Luis Potosi 78210, MexicoGalvanising Spanish Assoc, ATEG, Madrid 28046, Spainde la Fuente, D, Natl Ctr Met Res, CENIM, Avda Gregorio Arno 8, Madrid 28040, Spain TI - Atmospheric corrosion behavior of paint systems applied on weathered hot-dip galvanized steel AB - The durability of a paint coating applied on a galvanized steel surface which has been exposed for a certain time to the atmosphere depends on the aggressiveness of the atmosphere, the preparation of the weathered surface prior to painting, and the type of coating applied. This work presents the results of an atmospheric corrosion study carried out over 11 years in three Spanish atmospheres of highly different degrees of aggressiveness (Madrid, Bilbao, and Tenerife), applying eight paint coatings on galvanized steel weathered in different conditions and using different methods to prepare the aged metallic surface prior to painting MH - Mexico|San Luis Potosi MH - Spain PB - BLUE BELL: FEDERATION SOC COATING TECH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0361-8773 UR - ISI:000179788900012 SO - Journal of Coatings Technology 2002 ;74(935):59-68 5238 UI - 9892 AU - de la Fuente J AU - Van den Bussche RA AU - Garcia-Garcia JC AU - Rodriguez SD AU - Garcia MA AU - Guglielmone AA AU - Mangold AJ AU - Passos LMF AU - Ribeiro MFB AU - Blouin EF AU - Kocan KM AD - Oklahoma State Univ, Coll Vet Med, Dept Vet Pathobiol, Stillwater, OK 74078, USAOklahoma State Univ, Dept Zool, Stillwater, OK 74708, USAOklahoma State Univ, Collect Vertebrates, Stillwater, OK 74708, USACIVAC, SAGARPA, Inst Nacl Invest Forestales Agr & Pecuarias, CENID Parasitol Vet, Jiutepec 62550, Morelos, MexicoInst Nacl Tecnol Agropecuaria, Estac Expt Agropecuaria Rafaela, Santa Fe, ArgentinaUniv Fed Minas Gerais, Escola Vet, Belo Horizonte, MG, BrazilUniv Fed Minas Gerais, Inst Ciencias Biol, Belo Horizonte, MG, Brazilde la Fuente, J, Oklahoma State Univ, Coll Vet Med, Dept Vet Pathobiol, 250 McElroy Hall, Stillwater, OK 74078 USA TI - Phylogeography of New World isolates of Anaplasma marginale based on major surface protein sequences AB - Gene and protein sequences of major surface proteins (MSP) 1a and 4 of Anaplasma marginale (Rickettsiales: Anaplasmataceae) were used to infer phylogenetic relationships between New World isolates from Argentina, Brazil, Mexico and the United States. Seventeen isolates of A. marginale plus two outgroup taxa (A. centrale and A. ovis) were used for maximum-parsimony analysis of MSP4, while 20 isolates were used for phylogenetic analysis of MSP1a. msp4 analysis provided strong bootstrap support for a Latin American clade and, within this clade, support was detected for Mexican and South American clades. Isolates of A. marginale from the United States also grouped into two clades from the southern (isolates from Florida, Mississippi, and Virginia) and west-central (isolates from California, Idaho, Illinois, Oklahoma, and Texas) states. Although little phylogeographic resolution was detected within these higher clades, msp4 sequences appear to be a good genetic marker for inferring phylogeographic patterns of A. marginale isolates. In contrast to the phylogeographic resolution provided by msp4, MSPla DNA and protein sequence were quite variable and did not provide phylogeographic resolution. Most variation in MSP1a sequences appeared unique to a given isolate and similar DNA sequence variation in msp1alpha was detected within isolates from Idaho and Florida and from Idaho and Argentina. The results of these studies demonstrated that msp4 provided phylogenetic information on the evolution of A. marginale isolates. In contrast MSP1a sequences appeared to be rapidly evolving and these sequences may provide phylogeographic information only when numerous isolate MSP1a sequences are analyzed from a geographic area. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 35 U4 - Microbiology;Veterinary Sciences U5 - J;Article AV - English IS - 0378-1135 UR - ISI:000178872700006 L2 - Anaplasma marginale;biogeography;Ehrlichia spp.;major surface protein;tick;BOVINE ERYTHROCYTES; OVIS INFECTION; CATTLE; IDENTIFICATION; CONSERVATION; ADHESINS; STRAIN; CELLS; 1A; 1B SO - Veterinary Microbiology 2002 ;88(3):275-285 5239 UI - 11447 AU - De La Torre SD AU - Garcia DE AU - Claussen N AU - Janssen R AU - Nishikawa Y AU - Miyamoto H AU - Martinez-Sanchez R AU - Garcia L AU - Rios-Jara D AD - CIMAV, Adv Mat Res Ctr, Chih 31109, MexicoSt Catarina Fed Univ, Dept Chem Engn, BR-88010970 Florianopolis, SC, BrazilTechnol Res Inst Osaka Prefecture, Osaka 5941157, JapanTech Univ Hamburg, Adv Ceram Grp, DE-21071 Hamburg, GermanyDe la Torre, SD, CIMAV, Adv Mat Res Ctr, M Cervantes 120, Chih 31109, Mexico TI - Spark plasma sintering of alumina-Cr and -Nb composites AB - Attrition-milled Nb-50vol%Al2O3 and Cr-50vol%Al2O3 powders have been densified from 13 10 to 1450degreesC in about 10min using the spark plasma sintering (SPS) process applying 45MPa of pressure. The milling intensity as conducted on the metal-Al2O3 powders has been found to play a fundamental role determining not only the degree of densification but also the final nature of the composites thus processed. Although the longer milling time conducted on the precursor powders has lead to a material of finer microstructure, the formation of hydroxides hinders its densification capability and strength. The maximum fracture strength developed in these composites has been attained in the Nb-Al2O3 material reaching 825MPa. The SPS densification process of these cermets is discussed MH - Brazil MH - Germany MH - Japan MH - Mexico|Chihuahua PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000174657900045 L2 - alumina-based composites;fracture strength;spark plasma sintering SO - Metastable, Mechanically Alloyed and Nanocrystalline Materials 2002 ;386-3():299-303 5240 UI - 10501 AU - de Leon F AU - Semlyen A AD - Univ Michoacana, Fac Ingn Elect, Div Estudios Posgrado, Morelia 58030, Michoacan, MexicoUniv Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canadade Leon, F, Univ Michoacana, Fac Ingn Elect, Div Estudios Posgrado, Morelia 58030, Michoacan, Mexico TI - Iterative solvers in the Newton power flow problem: preconditioners, inexact solutions and partial Jacobian updates AB - A comparative study of available iterative solvers (for linear systems of equations) applied to the solution of the nonlinear Newton power flow problem is presented. Iterative solvers are combined with Newton's method and an optimal stopping strategy is included to obtain an efficient solution for large power systems. Using the solvers and preconditioners available in Matlab, it is shown that iterative solvers are more efficient than the direct LU solution for large power systems. An easy to implement refinement is the introduction of partial Jacobian updates to avoid additional computations when an equation has reached the convergence tolerance. For large power systems (3000 buses and more), we have obtained savings (in flops) in the order of 25% compared to the direct LU solution. A convergence characterisation of the Newton power flow based on the Jacobian's spectrum and its condition number is also presented MH - Canada MH - Mexico|Michoacan PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1350-2360 UR - ISI:000177339800015 SO - Iee Proceedings-Generation Transmission and Distribution 2002 ;149(4):479-484 5241 UI - 11862 AU - de Leon GPP AU - Choudhury A AD - Univ Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 04500, DF, MexicoUS Geol Survey, Natl Wildlife Hlth Ctr, Madison, WI 53711, USAde Leon, GPP, Univ Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Apartado Postal 70-153, Mexico City 04500, DF, Mexico TI - Adult endohelminth parasites of ictalurid fishes (Osteichthyes : Ictaluridae) in Mexico: Empirical evidence for biogeographical patterns AB - The helminth fauna of Mexican ictalurids was investigated through original surveys and published literature in order to evaluate the biogeography of host-parasite associations of a primarily nearctic host group in a major faunal transition area. In total. 84 specimens of 4 species of ictalurids (Ictalurus balsanus, Ictalurus dugesi. Ictalurus furcatus, and Ictalurus punctatus) were sampled from 7 localities in 5 hydrological drainages. Ten species of adult endohelminths were recovered from this survey. including 4 species of digeneans (Phyllodistomum lacustri, Genarchella tropica, Alloglossidium corti, and Campechetrema sp,), 3 cestodes (Corallobothrium fimbriatum, Megathylacoides giganteum, and Choanoscolex lamothei), and 3 nematodes (Dichelyne me,xi(anus. Goezia sp.. and Rhabdochona sp.). The adult helminth fauna of ictalurids reported in this study is composed of taxa that Lire typical of ictalurids in other parts of North America. north of Mexico, This core fauna (in a historical biogeographic sense) includes the corallobuthriines C. fimbriatum and M. giganteum and the digeneans P. lacustri and A. corti. Two other helminths, C. lamothei and D. mexicanus. may be added to this group in the future. Other helminths occurred sporadically and provide evidence for host-sharing (ecological host extensions), but we were unable to identify any valid cases of host-switching from more distantly related hosts. The helminth fauna provides evidence that the ictalurids developed their characteristic helminth fauna without neotropical influences and that the phylogenetic affinities of the ictalurids do not appear to be with any neotropical siluriform MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 11 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000173696300002 L2 - Ictaluridae;Ictalurus spp.;Digenea;Cestoda;Nematoda;Phyllodistomum lacustri;Genarchella tropica;Alloglossidium corti;Campechetrema sp.;Corallobothrium fimbriatum;Megathylacoides giganteum;Choanoscolex lamothei;Dichelyne mexicanus;Goezia sp.;Rhabdochona sp.;helminths;biogeography;Mexico;FRESH-WATER FISH; HELMINTH COMMUNITIES SO - Comparative Parasitology 2002 ;69(1):10-19 5242 UI - 9607 AU - De Mejia EG AU - Ramirez-Mares MV AU - Nair MG AD - Univ Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801, USAUniv Queretaro, Sch Chem, Queretaro 76010, MexicoMichigan State Univ, Dept Hort, E Lansing, MI 48824, USAMichigan State Univ, Natl Food Safety & Toxicol Ctr, E Lansing, MI 48824, USAde Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 228 ERML,M-C 051,11201 W Gregory Dr, Urbana, IL 61801 USA TI - Topoisomerase I and II enzyme inhibitory aqueous extract of Ardisia compressa and ardisin protect against benomyl oxidation of hepatocytes AB - Tea preparations of Ardisia compressa (AC) have been used in folk medicine against liver disorders. The objective of this study was to evaluate the in vitro topoisomerase I and II enzyme inhibition and the antioxidant effect of an aqueous extract from dry leaves of AC and a pure component (ardisin) purified from AC on benomyl (Be)-induced cytotoxicity in primary culture rat hepatocytes. Lipid peroxidation (malondialdehyde), antioxidant enzyme activities of glutathione reductase, glutathione peroxidase, and superoxide dismutase, and glutathione levels were studied. Topoisomerase I and II enzyme inhibition was used to guide purification of ardisin, which was purified using TLC, MPLC, and preparative and analytical HPLC methods. Benomyl increased malondialdehyde (58% change in comparison to the control) and glutathione peroxidase (10%), producing a significant consumption of endogenous antioxidant glutathione (65%, P < 0.05). A 94% hepatocyte protection was observed when cells were first exposed to ardisin (0.27 mug/mL), followed by Be (35 mug/mL). Cell protection by the tea extract of AC (AE) was greater than that by (-)-epigallocatechin 3-gallate (EGCG). Ardisin showed a clear inhibition of topoisomerases I and II catalytic activity in Saccharomyces cerevisiae mutant cells JN 394, JN394(t-1), and JN394t-(2-5). The potency of ardisin was superior to that of AE and EGCG as an antioxidant, protecting rat hepatocytes when exposed to Be. On the basis of the effective concentrations of equivalents to {+}catechin found in the present study, it can be estimated that, in order to gain antioxidative protection, a person would need to ingest approximately 1 L of AC tea per day, with a total content of 10.8 g of plant material MH - USA MH - Mexico|Queretaro PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000179833700035 L2 - Ardisia compressa;ardisin;epigallocatechin gallate;benomyl;oxidative stress;antioxidant protection;LIPID-PEROXIDATION; TEA EXTRACTS; BLACK TEA; GLUTATHIONE; RATS; CYTOTOXICITY; THEAFLAVINS; ANTIOXIDANT; METABOLISM; FUNGICIDE SO - Journal of Agricultural and Food Chemistry 2002 ;50(26):7714-7719 5243 UI - 10025 AU - De Mejia EG AU - Ramirez-Mares MV AD - Univ Queretaro, Sch Chem, Queretaro, Mexicode Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 228 ERML,M-C 051,11201 W Gregory Dr, Urbana, IL 61801 USA TI - Leaf extract from Ardisia compressa protects against 1-nitropyrene-induced cytotoxicity and its antioxidant defense disruption in cultured rat hepatocytes AB - Herbal tea preparations of Ardisia compressa (AC) have been used in folk medicine against liver disorders. The objective of this study was to evaluate the in vitro protective effect of an aqueous extract of dry leaves of AC on 1-nitropyrene (1-NP) induced cytotoxicity on rat hepatocytes. Lipid peroxidation (malondialdehyde), antioxidant enzyme activities (glutathione reductase, glutathione peroxidase, superoxide dismutase) and glutathione levels were studied. After 2 h of incubation, 0.25 mug/ml of 1-NP had an approximately 50% cytotoxic effect on hepatocytes. This environmental toxicant also increased malondialdehyde (77%), and glutathione peroxidase (46%), producing a significant consumption of endogenous antioxidant glutathione. (-)Epigallocatechin 3-gallato (EGCG) and AC decreased the viability of hepatocytes after 2 h of incubation at concentrations above 3 mug/ml and 2.52 mug, equivalents of (+)catechin/ml, respectively. A 100% hepatocyte protection was observed when cells were first exposed to AC (2.52 mug, equivalents of (+)catechin/ml), and then followed by 1-NP (0.25 mug/ml). Cells incubated with AC, either simultaneously or before treatment with 1-NP, were protected 75 and 84%, respectively. Cell protection of AC was superior to EGCG. Addition of AC to 1-NP (1:10) modulated superoxide dismutase and glutathione reductase activities (P < 0.005), as well as the cellular level of GSH. The results indicate that AC has an antioxidant protective effect on rat hepatocytes when exposed to 1-NP. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - USA MH - Mexico|Queretaro PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0300-483X UR - ISI:000178584000015 L2 - Ardisia compressa;1-nitropyrene;cytotoxicity;oxidative stress;antioxidant protection;OXIDATIVE STRESS; TEA EXTRACTS; BLACK TEA; LEAVES; ANTIMUTAGENICITY; HYDROPEROXIDE; GENOTOXICITY; POLYPHENOLS; GLUTATHIONE; THEAFLAVINS SO - Toxicology 2002 ;179(1-2):151-162 5244 UI - 11349 AU - De Mejia EG AU - Rocha N AU - Winter HC AU - Goldstein IJ AD - Univ Queretaro, DIPA, Queretaro 76040, MexicoTechnol Inst Durango, Durango, MexicoUniv Michigan, Dept Biol Chem, Ann Arbor, MI 48109, USA TI - Differential effect of a lectin from mesquite (Prosopis juliflora) on HeLa and normal human keratinocyte cells MH - Mexico|Durango MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593901548 SO - Faseb Journal 2002 ;16(5):A1005-A1005 5245 UI - 10358 AU - de Oliveira-Garcia D AU - Dall'Agnol M AU - Rosales M AU - Azzuz ACGS AU - Martinez MB AU - Giron JA AD - Benemerita Univ Autonoma Puebla, Ctr Invest Ciencias Microbiol, Puebla, MexicoInst Dante Pazzanese Cardiol, Clin Lab, Sao Paulo, BrazilUniv Sao Paulo, Inst Ciencias Biomed, Dept Microbiol, BR-05508 Sao Paulo, BrazilUniv Sao Paulo, Fac Ciencias Farmaceut, Dept Anal Clin, BR-05508 Sao Paulo, BrazilGiron, JA, Benemerita Univ Autonoma Puebla, Ctr Invest Ciencias Microbiol, Edificio 76,Ciudad Univ,CP 72000, Puebla, Mexico TI - Characterization of flagella produced by clinical strains of Stenotrophomonas maltophilia AB - Stenotrophomonas maltophilia is an emerging nosocomial pathogen associated with opportunistic infections in patients with cystic fibrosis, cancer, and HIV. Adherence of this organism to abiotic surfaces such as medical implants and catheters represents a major risk for hospitalized patients. The adhesive surface factors involved in adherence of these bacteria are largely unknown, and their flagella have not yet been characterized biochemically and antigenically. We purified and characterized the flagella produced by S. maltophilia clinical strains. The flagella filaments are composed of a 38-kDa subunit, SMFliC, and analysis of its N-terminal amino acid sequence showed considerable sequence identity to the flagellins of Serratia marcescens (78.6%), Escherichia coli, Proteus mirabilis, Shigella sonnei (71.4%), and Pseudomonas aeruginosa (57.2%). Ultrastructural analysis by scanning electron microscopy of bacteria adhering to plastic showed flagellalike structures within the bacterial clusters, suggesting that flagella are produced as the bacteria spread on the abiotic surface MH - Brazil MH - Mexico|Puebla PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 9 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000177728700007 L2 - CYSTIC-FIBROSIS PATIENTS; ESCHERICHIA-COLI; XANTHOMONAS-MALTOPHILIA; PSEUDOMONAS-MALTOPHILIA; BIOFILM FORMATION; MOTILITY; INFECTION; COLONIZATION; EXPRESSION; INVASION SO - Emerging Infectious Diseases 2002 ;8(9):918-923 5246 UI - 9562 AU - de Pablo-Galan L AU - de Pablo JJ AU - Chavez-Garcia MD AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexicode Pablo-Galan, L, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Diagenesis and rheology of a recent-Pleistocene volcanogenic sedimentary sequence, Mexican Basin AB - Diagenesis of the Holocene-Pleistocene volcanogenic sediments of the Mexican Basin produced, in strata of gravel and sand, 1H(2)O- and 2H(2)O-smectite, kaolinite, R3-2H(2)O-smectite (0.75)-kaolinite, R1-2H(2)O-smectite (0.75)-kaotinite, R3-kaolinite (0.75)-2H(2)O-smectite and R1-H2O-smectite (0.75)-kaolinite. Smectite platelets were formed from volcanic glass by loss of Si4+. Partially formed platelets have Si4+ between 4.55-4.10 a.p.f.u., Mg+Mn and the interlayer charge are relatively uniform while Al-VI+Fe3++Ti varies between 0.98 and 1.63 a.p.f.u. Almost fully transformed platelets have Si4+ of 4.08-4.04 a.p.f.u.; Mg+Mn and the interlayer charge decrease proportionally to increasing Al-VI+Fe3++Ti. Smectite-kaolinite mixed layers have octahedral occupancies of 2.01-2.15 a.p.f.u., Al-IV(3+) 0.09-0.55 a.p.f.u. and interlayer charges about half that of smectite; structural formulae corresponding to smectite (0.75-0.80)-kaolinite indicate octahedral occupancy of 2.50 a.p.f.u., tetrahedral replacement 0-0.31 a.p.f.u., and interlayer charge 0.24-0.51 equivalents, some indicating interstratifications of beidellite. Kaolinite is presumed to have formed from K-feldspar; smectite-kaolinite interstratifications sustain the transformation of kaolinite to smectite in an increasingly siliceous high-cation environment. In the mudstones of low-hydraulic conductivity and practically stagnant alkaline fluids, glass was transformed to 2H(2)O-smectite lamellae of Al-IV between 0 and 0.47 a.p.f.u., octahedral occupancy 1.70-2.00 a.p.f.u. and interlayer charge of 0.23-1.21 equivalents, some corresponding to beidellite. The interlayer charge increases with Al-IV and decreasing occupancy of the octahedral sheet; the abundance of Mg+Mn is inverse to that of Al-VI+Fe3++Ti. Clay suspensions containing 1H(2)O- and 2H(2)O-smectite, kaolinite and R3-H2O-smectite (0.75)kaolinite lead to low-energy edge-to-edge particle associations, non-Newtonian pseudoplastic behavior, and maximum apparent viscosity of 180 Pa s at 0.008 s(-1) followed by rapid descent. Clay fractions with slightly larger 2H(2)O-smectite contents and smaller kaolinite contents reach maximum viscosity of 3611 Pa s at a shear rate of 0.0018 s(-1) and of 3300 Pa s at 0.0024 s(-1). They denote two high-energy face-to-face particle associations, followed by slow descent of the apparent viscosity under viscous flow. Suspensions change from elastic to viscous behavior at shear stresses of 1.03 and 5.91 Pa, respectively. Clay suspension vibrated at a frequency of 1 Hz develops a shear storage dynamic modulus greater than the shear dynamic loss modulus or the energy is preferentially stored, whereas at 5 Hz more energy is dissipated than stored MH - Mexico|Distrito Federal MH - USA PB - AURORA: CLAY MINERALS SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Mineralogy;Soil Science;Water Resources U5 - J;Article AV - English IS - 0009-8604 UR - ISI:000179977900013 L2 - clay mineralogy;diagenesis;recent volcanogenics;Mexican Basin;rheology;ELECTROLYTE CONCENTRATION; CHLORITE; CORRENSITE; SMECTITE; ROCKS; TRANSFORMATION; SAPONITE; ORIGIN SO - Clays and Clay Minerals 2002 ;50(6):807-823 5247 UI - 10773 AU - de Paz AG AU - Silich SA AU - Madore BF AU - Contreras CS AU - Zamorano J AU - Gallego J AD - CALTECH, NASA IPAC Extragalact Database, Pasadena, CA 91125, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Golosiiv, UkraineCarnegie Inst Washington Observ, Pasadena, CA 91101, USAUniv Complutense Madrid, Dept Astrofis, E-28040 Madrid, Spainde Paz, AG, CALTECH, NASA IPAC Extragalact Database, MS 100-22,770 S Wilson Ave, Pasadena, CA 91125 USA TI - (CO)-C-12 mapping of the low-metallicity blue compact dwarf galaxy Markarian 86 AB - We have mapped the (CO)-C-12 J = 1-0 and J = 2-1 line emission in Markarian 86, one of the most metal-deficient blue compact dwarf galaxies so far detected in (CO)-C-12. The (CO)-C-12 emission is distributed in a horseshoe-like structure that follows the locus of the most recent star formation regions. The minimum in molecular line emission corresponds to the position of an older, massive nuclear starburst. The H-2 mass of the galaxy [in the range of (0.4-5) x 10(7) M.] and its morphology have been compared with the predictions of hydrodynamic simulations of the evolution of the interstellar medium surrounding a nuclear starburst. These simulations suggest that the physical conditions in the gas swept out by the starburst could have led to the formation of the ring of molecular gas reported here. This result provides an attractive scenario for explaining the propagation (in a galactic scale) of the star formation in dwarf galaxies MH - USA MH - Mexico|Puebla MH - Spain MH - Ukraine PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176663100008 L2 - galaxies : dwarf;galaxies : evolution;galaxies : individual (Markarian 86);galaxies : starburst;radio lines : galaxies;STAR-FORMATION; MOLECULAR GAS; RAY-EMISSION; CLOUDS; DRIVEN; BUBBLES; MRK-86; WINDS; CO SO - Astrophysical Journal 2002 ;573(2):L101-L105 5248 UI - 11835 AU - de Queiroz A AU - Lawson R AU - Lemos-Espinal JA AD - Univ Colorado, Dept Environm Populat & Organism Biol, Boulder, CO 80309, USAUniv Colorado Museum, Boulder, CO 80309, USACalif Acad Sci, Osher Fdn Lab Mol Systemat, San Francisco, CA 94118, USACalif Acad Sci, Dept Herpetol, San Francisco, CA 94118, USAEscuela Nacl Estudios Profes Iztacala, Ecol Lab, Los Reyes Iztacala 54090, Estado De Mexic, Mexicode Queiroz, A, Univ Colorado, Dept Environm Populat & Organism Biol, Campus Box 334, Boulder, CO 80309 USA TI - Phylogenetic relationships of North American garter snakes (Thamnophis) based on four mitochondrial genes: How much DNA sequence is enough? AB - The clade of garter snakes (Thamnophis) includes some of the most abundant and well-studied snakes in North America. However, phylogenetic relationships within this group have been little studied. We used DNA sequences of four mitochondrial genes (cytochrome b and NADH dehydrogenase subunits 1, 2, and 4) to estimate relationships among 29 of the 31 recognized species of Thamnophis plus the related species Adelophis foxi. Both maximum parsimony (MP) and maximum-likelihood (ML) analyses of all these genes combined produced well-resolved trees with moderate (70-89%) to strong (90-100%) bootstrap support for most clades. MP and ML trees were very similar, with no strongly supported conflict between the two analyses. These analyses identify a clade of 12 species largely restricted to Mexico (the "Mexican clade"), and a clade containing 15 species that collectively range from Central America to southern Canada (the "widespread clade"). These two groups are identified as sister taxa in both MP and ML analyses. A clade consisting of the ribbon snakes (T. sauritus and T. proximus) and the common garter snake (T. sirtalis) is placed as the sister group to all other Thamnophis (i.e., the Mexican + widespread clades) in our analyses. High bootstrap proportions at several levels in the tree support the inclusion of both Thamnophis validus, which has traditionally been placed in the genus Nerodia, and the poorly known species Adelophis foxi within Thamnophis. We used randomly sampled characters (i.e., standard bootstrapping) and randomly sampled contiguous blocks of characters to examine the effect of number of characters on resolution of and support for relationships within Thamnophis using NIP. In general, these analyses indicate that we have reached a point of strongly diminishing returns with respect to the effect of adding mtDNA sequence characters for the current set of taxa; our sample of 3809 mtDNA characters is apparently "enough." The next steps to improve the phylogenetic estimate may be to add nuclear DNA sequences, morphology, or behavior, or to sequence additional mtDNA lineages within species. (C) 2002 Elsevier Science (USA) MH - USA MH - Mexico|Estado De Mexico PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 32 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Review AV - English IS - 1055-7903 UR - ISI:000173689000014 L2 - Adelophis foxi;biogeography;Isthmus of Tehuantepec;Mexico;mitochondrial DNA;number of characters;phylogeny;snakes;Thamnophiini;Thamnophis;INFERRING COMPLEX PHYLOGENIES; NATURAL-POPULATIONS; MAXIMUM-LIKELIHOOD; COMBINING DATA; RESTRICTION ENDONUCLEASES; VANCOUVER ISLAND; DATA SETS; TAXA; CHARACTERS; ACCURACY SO - Molecular Phylogenetics and Evolution 2002 ;22(2):315-329 5249 UI - 10219 AU - Defeo O AU - Cardoso RS AD - Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97310, Yucatan, MexicoFac Ciencias, UNIDECIMAR, Montevideo 11400, UruguayUNIRIO, Dept Ciencias Nat, Lab Dinam Populacoes Marinhas, BR-22290240 Rio De Janeiro, RJ, BrazilDefeo, O, Ctr Invest & Estudios Avanzados, Unidad Merida, Carretera Antigua Progresso Km 6,POB 73, Merida 97310, Yucatan, Mexico TI - Macroecology of population dynamics and life history traits of the mole crab Emerita brasiliensis in Atlantic sandy beaches of South America AB - Several studies have shown consistent macroinfauna community patterns in sandy beaches that could be mainly explained by variations in physical factors (i.e. grain size, beach slope, swash processes). However, the macroecology of population dynamics and biogeographic patterns in life history traits have not been adequately assessed in sandy beach ecology. Here, we examine the latitudinal variation of population dynamics and life history traits of the Sandy intertidal mole crab Emerita brasiliensis in sandy beaches along the entire range of the species distribution of some 2700 km of the Atlantic coast of South America. Population structure by sex and size, individual growth, natural mortality, and the length-fecundity and length-weight relationships were compared. Most of the life history and population dynamics features of Emerita brasiliensis show clear geographical patterns: (1) a shift from continuous to seasonal reproductive and recruitment events from subtropical to temperate sandy beaches; (2) an increase in the individual size of the smallest ovigerous female and in the fecundity at size (length-fecundity relationship) from subtropical to temperate beaches; (3) a higher predominance of females towards temperate beaches; (4) an increase in male sizes towards subtropical beaches, following a direct relationship with mean water temperature of the surface zone; (5) a significant correlation between female growth parameters (L-infinity = inverse and K and phi' = direct) and surface water temperature; (6) an increase in the individual weight at size (length-weight relationship) from subtropical to temperate beaches, both for males and females; and (7) a linear decrease in life span and an asymptotic increase in natural mortality (both sexes) from temperate to subtropical beaches. The additional effect of morphodynamics at a regional scale was also detected, and in some cases masked or ameliorated clear latitudinal trends. Populations on dissipative beaches had a more extended reproductive season than in reflective beaches, as well as higher growth performance, fecundity and somatic weight at size. The decreasing occurrence of females in subtropical beaches might explain the unexpected but consistently increasing male crab sizes towards lower latitudes. This supports the hypothesis of asymmetric intraspecific competition between sexes, which may be considered a critical regulating process in sandy beach populations MH - Brazil MH - Mexico|Yucatan MH - Uruguay PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 16 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000178175000016 L2 - mole crab;Emerita brasiliensis;macroecology;population dynamics;sandy beaches;South America;GEOGRAPHIC-VARIATION; COMMUNITY STRUCTURE; ANALOGA STIMPSON; CALIFORNIA COAST; BIOLOGY; URUGUAY; MACROFAUNA; DECAPODA; BRAZIL; MORPHODYNAMICS SO - Marine Ecology-Progress Series 2002 ;239():169-179 5250 UI - 10740 AU - Defeo O AU - Rueda M AD - IPN, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoUNDECIMAR, Fac Ciencias, Montevideo, UruguayDefeo, O, IPN, Ctr Invest & Estudios Avanzados, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Spatial structure, sampling design and abundance estimates in sandy beach macroinfauna: some warnings and new perspectives AB - We discuss methodological aspects directed to quantify the across-shore population structure and abundance of sandy beach macroinfauna. The reliability of estimates derived from design-based (stratified random sampling) and model-based (geostatistics, kriging) approaches is discussed. Our analysis also addresses potential biases arising from environmentally driven designs that consider a priori fixed strata for sampling macroinfauna, as opposed to species-driven sampling designs, in which the entire range of across-shore distribution is covered. Model-based approaches showed, spatially, highly autocorrelated and persistent structures in two intertidal populations of the Uruguayan coast: the isopod Excirolana armata and the yellow clam Mesodesma mactroides. Both populations presented zonation patterns that ranged from the base of the dunes to upper levels of the subtidal. The Gaussian model consistently explained the spatial distribution of species and population components (clam recruits and adults), with a minor contribution (less than or equal to 5%) of unresolved, small-scale variability. The consistent structure of spatial dependence in annual data strongly suggests an across-shore-structured process covering close to 35 in. Kriging predictions through cross-validation corroborated the appropriateness of the models fitted through vario-graphic analysis, and the derived abundance estimates were very similar (maximum difference 7%) to those obtained from linear interpolation. Monthly analysis of E. armata data showed marked variations in its zonation and an unstable spatial structure according to the Gaussian model. The clear spatial structure resulting from species-driven sampling was not observed when data was truncated to simulate an environmentally driven sampling design. In this case, the linear semi-variogram indicated a spatial gradient, suggesting that sampling was not performed at the appropriate spatial scale. Further, the cross-validation procedure was not significant, and both density and total abundance were underestimated. We conclude that: (1) geostatistics provides useful additional information about population structure and aids in direct abundance estimation; thus we suggest it as a powerful tool for further applications in the study of sandy beach macroinfauna; and that (2) environmentally driven sampling strategies fail to provide conclusive results about population structure and abundance, and should be avoided in studies of sandy beach populations. This is especially true for microtidal beaches, where unpredictable swash strength precludes a priori stratification through environmental reference points. The need to use adaptive sampling designs and avoid snapshot sampling is also stressed. Methodological implications for the detection of macroecological patterns in sandy beach macroinfauna are also discussed MH - Mexico|Yucatan MH - Uruguay PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 20 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000176790700014 L2 - SOUTH-CENTRAL CHILE; PSEUDORCHESTOIDEA-BRASILIENSIS AMPHIPODA; CRAB EMERITA-BRASILIENSIS; TROPICAL ESTUARINE LAGOON; ZONATION PATTERNS; INTERTIDAL ZONATION; LIFE-HISTORY; POPULATIONS; MACROFAUNA; GEOSTATISTICS SO - Marine Biology 2002 ;140(6):1215-1225 5251 UI - 11148 AU - Del Angel P AU - Dominguez JM AU - Del Angel G AU - Montoya JA AU - Capilla J AU - Lamy-Pitara E AU - Barbier J AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Poitiers, LACCO, CNRS, Unite Rech Associee,DO 350, F-86022 Poitiers, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoDominguez, JM, Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, Mexico TI - Selective modification of Pt active sites on Pt-Au/C catalysts prepared by surface redox reactions AB - This study focused on the selective deposition of Au-0 onto (111), (100) faces and (111)/(100) edges of cuboctahedral Pt particles present on the Pt/C(graphite) model system. The Pt-Au/C catalysts were prepared by novel surface redox methods involving the direct reduction (DR) of AuCl4- species onto the Pt particles or reducing these species on the Pt-H interface. i.e., the refilling (RE) method. The presence of Au on the Pt particles was verified by means of high-resolution energy dispersive spectroscopy (EDS), and, after treatment at 300degreesC in H-2, the formation of crystalline Au-0 aggregates was verified by X-ray wide-angle diffraction; further treatments at 500degreesC in H-2 led to a true Pt-Au solid solution. The Monte Carlo simulation methods indicated the selective deposition of Au-0 onto the (111)/(100) edges of the Pt cuboctahedral particles when the relative Au concentration varied from 10 to 50 wt% Au. The catalytic conversion of n-heptane on the Pt-Au/C (DR and RE solids) catalysts presented an oscillatory behavior with respect to Pt/C, indicating modification of the active Pt ensembles. driven by the energy released during the exothermic n-C-7 dehydrogenation and cracking reactions, which should enhance the Au-0 mobility at the Pt particle surface level MH - France MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Applied;Chemistry, Physical U5 - J;Article AV - English IS - 1022-5528 UR - ISI:000175570300007 L2 - surface redox methods;EDS microanalysis of Pt-Au/C catalysts;Monte Carlo calculations of Pt ensembles;BIMETALLIC CATALYSTS; PRECURSORS; CONVERSION; PLATINUM SO - Topics in Catalysis 2002 ;18(3-4):183-191 5252 UI - 11220 AU - Del Angel PL AU - Muller-Stach SJ AD - Ctr Invest Matemat, Guanajuato 36000, MexicoUniv Essen Gesamthsch, Fachbereich Math 6, D-45117 Essen, GermanyDel Angel, PL, Ctr Invest Matemat, AP 402, Guanajuato 36000, Mexico TI - The transcendental part of the regulator map for K-1 on a mirror family of K3-surfaces AB - We compute the transcendental part of the normal function corresponding to the Deligne class of a cycle in K-1 of a mirror family of quartic K3 surfaces. The resulting multivalued function does not satisfy the hypergeometric differential equation of the periods, and we conclude that the cycle is indecomposable for most points in the mirror family. The occurring inhomogenous Picard-Fuchs equations are related to Painleve VI-type differential equations MH - Germany MH - Mexico|Guanajuato PB - DURHAM: DUKE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0012-7094 UR - ISI:000175379900006 L2 - HIGHER K-THEORY; ELLIPTIC-CURVES; SURFACES; CYCLES SO - Duke Mathematical Journal 2002 ;112(3):581-598 5253 UI - 10224 AU - del Castillo LF AU - az-Calleja R AU - Garcia-Bernabe A AU - Sanchis MJ AD - UNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Politecn Valencia, Dept Termodinam Aplicada, E-46071 Valencia, Spaindel Castillo, LF, UNAM, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - Properties of the first and second order memory functions of dielectric relaxation AB - The first and second order memory functions (FOMF, SOMF) are obtained considering their definitions given in terms of the complex dielectric permittivity, using numerical methods explained elsewhere and starting from the experimental data. The frequency behaviour of the correlation functions of the dipole-moment and the SOMF are analysed for two glass-forming materials. For a particular window of values of the Havriliak-Negami parameters, the imaginary part of the second order memory function shows an absorption type-band related to dipolar libration effect. Outside of this window this band is not observed. Furthermore, the corresponding first order memory function is presented and we discuss its mid-range variation and its temperature dependence. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000178038100040 L2 - SUPERCOOLED LIQUIDS; AMORPHOUS POLYMERS; DYNAMICS; BEHAVIOUR SO - Journal of Non-Crystalline Solids 2002 ;307():288-295 5254 UI - 10897 AU - del Pozo R AU - Diez V AU - Garrido SE AU - Morales M AU - Osorio R AD - Univ Burgos, Biotechnol & Food Sci Dept, Burgos 09006, SpainUniv State Mexico, Interamer Ctr Water Resources, Fac Engn, Edo De Mexico, MexicoOperadora Ecosistemas SA CV, Mexico City 03100, DF, MexicoDiez, V, Univ Burgos, Biotechnol & Food Sci Dept, Pza Misael Banuelos S-N, Burgos 09006, Spain TI - Hydraulic distribution effect on a real-scale trickling filter AB - In this work, the influence of several operational parameters on the efficiency of a real-scale trickling filter placed in an urban wastewater treatment plant in Mexico, is discussed. Special attention is placed on the parameters that influence the biofilm hydraulics such as the instantaneous dosing intensity (SK) and the radial distribution of the superficial hydraulic load. The low speed of the distribution arms forced an instantaneous dosing intensity of 150 mm/pass, resulting in a short liquid retention time of 32 s, which was the reason why a poor COD removal efficiency was obtained. The average removal is 36%, although the daily efficiencies increase with increasing inlet COD concentrations. However, the high shear forces of the water provides a constant and homogenous biofilm detachment, avoiding filter clogging because of the solids. Finally, a slight decrease in the theoretical efficiency has been found due to a nonuniform radial distribution of flow, because the real superficial load is too high in the center of the filter MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Spain PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1092-8758 UR - ISI:000176255100004 L2 - trickling filter;urban wastewater;hydraulic distribution;instantaneous dosing intensity;residence time SO - Environmental Engineering Science 2002 ;19(3):151-157 5255 UI - 8415 AU - Del Puerto F AU - Ben Ghalia M AD - Univ Texas Pan Amer, Dept Elect Engn, Edinburg, TX 78539, USALG Elect, Televis Div, Elect Design Dept, Reynosa, Tamaulipas, MexicoBen Ghalia, M, Univ Texas Pan Amer, Dept Elect Engn, Edinburg, TX 78539 USA TI - White color tracking adjustment in television receivers using neural networks AB - This paper discusses the application of neural networks to the white tracking adjustment of television receivers during production. High quality levels of tracking for the color temperature 8000 K were obtained with four-layer (7-10-10-6) network. The network input set consists of brightness level, high and low luminance levels, and "x" and "y" coordinates on the chromaticity diagram for both high and low luminance. The network output set consists of recommended adjustments for brightness, red, green, and blue cutoffs, and green and blue gains. The network was trained using the back-propagation algorithm. The experimental study has shown that the application of neural networks has reduced the testing time which has led to an increase in production rate. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Computer Science, Artificial Intelligence;Engineering, Multidisciplinary;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0952-1976 UR - ISI:000182964700008 L2 - television;color adjustment;quality control;neural networks;manufacturing applications SO - Engineering Applications of Artificial Intelligence 2002 ;15(6):601-606 5256 UI - 10607 AU - del Rio C AU - Sepulveda J AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoEmory Univ, Ctr AIDS Res, Atlanta, GA 30322, USASepulveda, J, Inst Nacl Salud Publ, Av Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - AIDS in Mexico: lessons learned and implications for developing countries MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 21 U4 - Immunology;Infectious Diseases;Virology U5 - J;Review AV - English IS - 0269-9370 UR - ISI:000177111900001 L2 - AIDS;Mexico;blood donor;commercial sex worker;COMMERCIAL SEX WORKERS; SEXUALLY-TRANSMITTED DISEASE; PAID PLASMA DONORS; RISK-FACTORS; HIV TRANSMISSION; VIRUS-INFECTION; BISEXUAL MEN; CITY; PREVALENCE; EPIDEMIC SO - Aids 2002 ;16(11):1445-1457 5257 UI - 10565 AU - Del Rio F AU - Avalos E AU - Espindola R AU - Rull LF AU - Jackson G AU - Lago S AD - Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2BY, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Pablo de Olavide, Fac Ciencias Expt, Seville 41013, SpainJackson, G, Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, Prince Consort Rd, London SW7 2BY, England TI - Vapour-liquid equilibrium of the square-well fluid of variable range via a hybrid simulation approach AB - The equilibrium between vapour and liquid in a square-well system has been determined by a hybrid simulation approach combining chemical potentials calculated via the Gibbs ensemble Monte Carlo technique with pressures calculated by the standard NVT Monte Carlo method. The phase equilibrium was determined from the thermodynamic conditions of equality of pressure and chemical potential between the two phases. The results of this hybrid approach were tested by independent NPT and muPT calculations and are shown to be of much higher accuracy than those of conventional GEMC simulations. The coexistence curves, vapour pressures and critical points were determined for SW systems of interaction ranges lambda = 1.25, 1.5, 1.75 and 2. The new results show a systematic dependence on the range lambda, in agreement with results from perturbation theory where previous work had shown more erratic behaviour MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 27 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177172900012 L2 - HYPERNETTED-CHAIN EQUATION; HMSA INTEGRAL-EQUATION; MONTE-CARLO SIMULATION; PERTURBATION-THEORY; COEXISTENCE PROPERTIES; COMPUTER-SIMULATION; ANALYTIC EQUATION; CRITICAL-BEHAVIOR; PHASE-BEHAVIOR; OF-STATE SO - Molecular Physics 2002 ;100(15):2531-2546 5258 UI - 9819 AU - del Valle L AU - Enam S AU - Lara C AU - Ortiz-Hidalgo C AU - Katsetos CD AU - Khalili K AD - Temple Univ, Coll Sci & Technol, Ctr Neurovirol & Canc Biol, Philadelphia, PA 19122, USAAmer British Cowdray Med Ctr IAP, Dept Pathol, Mexico City 01120, DF, MexicoMed Coll Penn & Hahnemann Univ, Dept Pediat, Philadelphia, PA 19129, USASt Christophers Hosp Children, Dept Pediat, Philadelphia, PA 19134, USASt Christophers Hosp Children, Dept Pathol, Philadelphia, PA 19134, USAKhalili, K, Temple Univ, Coll Sci & Technol, Ctr Neurovirol & Canc Biol, Philadelphia, PA 19122 USA TI - Detection of JC Polyomavirus DNA sequences and cellular localization of T-Antigen and agnoprotein in oligodendrogliomas AB - Conclusions: Collectively, these observations provide new evidence in support of the association of the oncogenic human neurotropic JCPyV and oligodendrogliomas. Purpose: Productive infection of the human neurotropic polyomavirus JCPyV in oligodendrocytes leads to the development of progressive multifocal leukoencephalopathy, a fatal demyelinating disorder of the central nervous system. In addition to its role in viral infection, JCPyV T-antigen can transform cells in vitro and induce tumors in experimental animals in the absence of viral DNA replication and late gene expression. The goal of this study is to examine the presence of JCPyV DNA sequences and viral antigens in a series of human oligodendrogliomas. Experimental Design: A total of 20 well-characterized oligodendrogliomas were examined for detection of the JCPyV genome by PCR and immunohistochemistry for expression of viral proteins. Results: Gene amplification has revealed the presence of JCPyV DNA sequences corresponding to the NH2-terminal of T-antigen in 15 of 20 samples. DNA sequences corresponding to late regions, which are responsible for production of the capsid protein, VP1, were detected in 14 of 20 samples. Sequencing of the viral control region determined the presence of JCPyV Mad-4 or JCPyV(cy) in these tumors. By immunohistochemistry, T-antigen expression was detected in the nuclei of tumor cells from 10 samples that also contained corresponding DNA sequences by PCR. Eleven of 20 tumors exhibited immunoreactivity for the late auxiliary gene product, agnoprotein. None of the samples showed immunoreactivity for the capsid proteins, ruling out productive infection of neoplastic cells by JCPyV. Conclusions: Collectively, these observations provide new evidence in support of the association of the oncogenic human neurotropic JCPyV and oligodendrogliomas MH - Mexico|Distrito Federal MH - USA PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 13 U4 - Oncology U5 - J;Article AV - English IS - 1078-0432 UR - ISI:000179266400005 L2 - PROGRESSIVE MULTIFOCAL LEUKOENCEPHALOPATHY; CENTRAL-NERVOUS-SYSTEM; BRAIN-TUMORS; ANAPLASTIC OLIGODENDROGLIOMAS; ONCOGENIC PROTEIN; ARMS 1P; VIRUS; EXPRESSION; 19Q; DIAGNOSIS SO - Clinical Cancer Research 2002 ;8(11):3332-3340 5259 UI - 11795 AU - Delboni LF AU - Iulek J AU - Burger R AU - da Silva ACR AU - Moreno A AD - Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP, BrazilUniv Estadual Ponta Grossa, Dept Quim, Ponta Grossa, PR, BrazilUniv Sao Paulo, Inst Quim, Sao Paulo, BrazilMoreno, A, Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - Applications of thermal-gradients method for the optimization of alpha-amylase crystallization conditions based on dynamic and static light scattering data AB - The expression, purification, crystallization, and characterization by X-ray diffraction of alpha-amylase are described here. Dynamic and static light scattering methods with a temperature controller was used to optimize the crystallization conditions of alpha-amylase from Bacillus stearothermophilus an important enzyme in many fields of industrial activity. After applying thermal gradients for growing crystals, X-ray cryo-crystallographic methods were employed for the data collection. Crystals grown by these thermal-gradients diffracted up to a maximum resolution of 3.8 Angstrom, which allowed the determination of the unit cell constants as follows: a = 61.7 Angstrom, b = 86.7 Angstrom, c = 92.2 Angstrom and space group C222 (or C222(1)). (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000173859500016 L2 - alpha-amylase;protein crystallization;dynamic and static light scattering;thermal gradients;ASPERGILLUS-AWAMORI GLUCOAMYLASE; SITE-DIRECTED MUTAGENESIS; BACILLUS-STEAROTHERMOPHILUS; CATALYTIC-SITE; RESIDUES; ENZYME; SPECIFICITY; TRANSITION; BINDING; BETA SO - Journal of Molecular Structure 2002 ;604(2-3):253-260 5260 UI - 9869 AU - Delgadillo JA AU - Flores JA AU - Veliz FG AU - Hernandez HF AU - Duarte G AU - Vielma J AU - Poindron P AU - Chemineau P AU - Malpaux B AD - Univ Autonoma Agraria Antonio Narro, Dept Anim Prod, Dept Ciencias Med Vet, Torreon, Coahuila, MexicoUniv Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla, Queretaro, MexicoUniv Tours, CNRS, INRA, Physiol Reprod & Comportements UMR 6073, F-37380 Nouzilly, FranceDelgadillo, JA, Univ Autonoma Agraria Antonio Narro, Dept Anim Prod, Dept Ciencias Med Vet, Carretera Santa Fe & Periferico,AP 940, Torreon, Coahuila, Mexico TI - Induction of sexual activity in lactating anovulatory female goats using male goats treated only with artificially long days AB - Two experiments were conducted to determine the response of Creole male goats treated with long days and melatonin implants, and the response of the anovulatory does to male effect using males treated only with artificially long days. All animals were allocated to open sheds. In Exp. 1, one group of males was under natural photoperiod (CG; n = 7); the second group was submitted to 2.5 mo of long days followed by the insertion of two s.c. melatonin implants (LD+MEL; n 7); the third group was subjected only to 2.5 mo of long days (LD; n = 7). Testicular weight was measured every 2 wk. Plasma testosterone concentrations were determined weekly. A treatment x time interaction was detected (P < 0.001) for testicular weight and plasma testosterone concentration. In the LD+MEL and LD groups, testicular size and plasma testosterone levels varied in a similar way, but differed from those observed in CG (P < 0.001). In this latter group, testicular weight displayed seasonal variations and peaked in June, whereas in treated groups this peak occurred in March. In CG, testosterone varied in a seasonal manner and plasma concentrations increased in June and remained elevated throughout the study. In experimental groups, testosterone increased in February and peaked in March. In Exp. 2, one group of males was left under natural photoperiod (CG, n = 5) and the other one was submitted to 2.5 mo of artificially long days (LD, n = 4). On March 16, two control and two treated males were put in contact with 20 and 19 females, respectively. Sexual behavior of the bucks was observed during the 5 d following male introduction. Progesterone assays and estrous behavior were used to determine ovarian and behavioral responses of the females to teasing. The anogenital sniffing, nudging, and mount instances registered in LD-treated males were greater than those observed in CG (P < 0.05). Of the does exposed to CG, none ovulated and only two of 20 females displayed estrous behavior. All does in contact with LD-treated males ovulated and showed at least one estrous behavior during the 15 d following joining (P < 0.001). These results indicate that the sexual activity of male goats from subtropical latitudes can be induced using only artificially long days. In addition, males treated in this way are capable of stimulating sexual activity in anovulatory females by the male effect MH - France MH - Mexico|Coahuila MH - Mexico|Queretaro PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000179152700002 L2 - goats;melatonin;photoperiod;sexual behavior;CIRCANNUAL REPRODUCTIVE RHYTHM; SUBTROPICAL NORTHERN MEXICO; AUSTRALIAN CASHMERE GOATS; MALE CREOLE GOATS; FEED-INTAKE; TESTOSTERONE; MELATONIN; SHEEP; EWE; PROGESTERONE SO - Journal of Animal Science 2002 ;80(11):2780-2786 5261 UI - 10971 AU - Deliza R AU - Saldivar SOS AU - Germani R AU - Benassi VT AU - Cabral LC AD - Dept Tecnol Alimentos, Monterrey 64849, NL, MexicoEMBRAPA, Food Technol, BR-23020470 Rio De Janeiro, BrazilSaldivar, SOS, Dept Tecnol Alimentos, Ave Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - The effects of colored textured soybean protein (TSP) on sensory and physical attributes of ground beef patties AB - Defatted soybean flour mixed with a combination of 0.03% Red No. 40 and 0.01% annatto (Bixa orellana) colorants was extruded into textured soy protein (TSP) in a counter-rotating twin extruder to produce a red-meat like product suitable for hamburger patties. Ground beef patties were processed replacing the meat (15 and 30%) with resulting hydrated textured soybean protein (TSP) prepared with and without the colorants. The resulting cooked patties were evaluated by eight trained judges for tenderness, juiciness, number of chews, beef flavor and overall flavor quality using a nine point nonstructured horizontal scale. Other patty characteristics examined included cooking losses (weight loss and diameter reduction) and color, by tristimulus colorimetric measurement. The results from sensory analysis revealed that ground beef patties with high TSP level were more tender than control, and they had less beef flavor and overall flavor quality. Weight loss was not significantly (P > 0.05) affected by TSP level but the patties with 30% TSP showed less shrinkage than the others. Results of the study suggested that while patties with 15% TSP had sensory attributes similar to the control, adding 30% TSP with coloring significantly (P < 0.05) increased the redness of the patties MH - Brazil MH - Mexico|Nuevo Leon PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0887-8250 UR - ISI:000176088900001 L2 - FAT MEAT-PRODUCTS; SOY PROTEIN; COOKING PROPERTIES; LEVEL; SHEAR SO - Journal of Sensory Studies 2002 ;17(2):121-132 5262 UI - 10042 AU - Demikhovskii VY AU - Izrailev FM AU - Malyshev AI AD - Nizhny Novgorod State Univ, Nizhnii Novgorod 603950, RussiaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoDemikhovskii, VY, Nizhny Novgorod State Univ, Gagarin Ave 23, Nizhnii Novgorod 603950, Russia TI - Quantum Arnol'd diffusion in a simple nonlinear system AB - We study the fingerprint of the Arnol'd diffusion in a quantum system of two coupled nonlinear oscillators with a two-frequency external force. In the classical description, this peculiar diffusion is due to the onset of a weak chaos in a narrow stochastic layer near the separatrix of the coupling resonance. We have found that global dependence of the quantum diffusion coefficient on model parameters mimics, to some extent, the classical data. However, the quantum diffusion happens to be slower than the classical one. Another result is the dynamical localization that leads to a saturation of the diffusion after some characteristic time. We show that this effect has the same nature as for the studied earlier dynamical localization in the presence of global chaos. The quantum Arnol'd diffusion represents a new type of quantum dynamics and can be observed, for example, in two-dimensional semiconductor structures (quantum billiards) perturbed by time-periodic external fields MH - Mexico|Puebla MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000178624100060 L2 - STOCHASTIC WEBS; RESONANCE; CHAOS SO - Physical Review e 2002 ;66(3): 5263 UI - 11436 AU - Demikhovskii VY AU - Izrailev FM AU - Malyshev AI AD - Nizhny Novgorod State Univ, Nizhnii Novgorod 603600, RussiaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoDemikhovskii, VY, Nizhny Novgorod State Univ, Gagarin Ave 23, Nizhnii Novgorod 603600, Russia TI - Manifestation of Arnol'd diffusion in quantum systems AB - We study an analog of the classical Arnol'd diffusion in a quantum system of two coupled nonlinear oscillators one of which is governed by an external periodic force with two frequencies. In a classical model this very weak diffusion happens in a narrow stochastic layer along the coupling resonance and leads to an increase of the total energy of the system. We show that quantum dynamics of wave packets mimics, up to some extent, global properties of the classical Arnol'd diffusion. This specific diffusion represents a new type of quantum dynamics and may be observed, for example, in 2D semiconductor structures (quantum billiards) perturbed by time-periodic external fields MH - Mexico|Puebla MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000174773400014 L2 - RESONANCE; CHAOS SO - Physical Review Letters 2002 ;88(15): 5264 UI - 11708 AU - Denicolo G AU - Terlevich R AU - Terlevich E AD - Univ Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla, MexicoDenicolo, G, Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England TI - New light on the search for low-metallicity galaxies - I. The N2 calibrator AB - We present a simple metallicity estimator based on the logarithmic [N II] lambda6584/Halpha ratio, hereafter N2, which we envisage will become very useful for ranking galaxies in a metallicity sequence from redshift survey-quality data even for moderately low spectral resolution. We have calibrated the N2 estimator using a compilation of H II galaxies having accurate oxygen abundances. plus photoionization models covering a wide range of abundances. The comparison of models and observations indicates that both primary and secondary nitrogen are important for the relevant range of metallicities. The N2 estimator follows a linear relation with log(O/H) that holds for the whole abundance range covered by the sample, from approximately 1/50th to twice the Solar value [7.2 < 12 + log(O/H) < 9.1]. We suggest that the ([S II] lambdalambda6717,6731/Halpha) ratio (hereafter S2) can also be used as a rough metallicity indicator. Because of its large scatter the S2 estimator will be useful only in systems with very low metallicity. where [N II] lambda6584 is not detected or in low-resolution spectra where [N II] lambda6584 is blended with Halpha MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 76 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000174057700013 L2 - galaxies : abundances;galaxies : evolution;galaxies : stellar content;NEAR-INFRARED SPECTROSCOPY; BLUE COMPACT GALAXIES; METAL-POOR GALAXY; CHEMICAL-COMPOSITION; SOUTHERN GALAXIES; OPTICAL SPECTROSCOPY; COMPOSITION GRADIENT; HELIUM ABUNDANCE; HII GALAXIES; REGIONS SO - Monthly Notices of the Royal Astronomical Society 2002 ;330(1):69-74 5265 UI - 10964 AU - Denisov A AU - Castro-Beltran HM AU - Carmichael HJ AD - Univ Oregon, Dept Phys, Eugene, OR 97403, USAUniv Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoDenisov, A, Univ Oregon, Dept Phys, Eugene, OR 97403, USA TI - Time-asymmetric fluctuations of light and the breakdown of detailed balance AB - Temporal fluctuations of the light radiated by a photoemissive source are studied through the cross correlation of output fields. Whereas microscopic reversibility guarantees time-symmetric fluctuations in thermal equilibrium where detailed balance holds away from equilibrium time asymmetry is permitted. Examples of time asymmetry in cavity QED are reported MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000175974800011 L2 - RESONANCE FLUORESCENCE; INTERFERENCE; EQUILIBRIUM; SYSTEMS SO - Physical Review Letters 2002 ;88(24): 5266 UI - 10345 AU - Descroix L AU - Barrios JLG AU - Vandervaere JP AU - Viramontes D AU - Bollery A AD - IRD, LTHE, F-38041 Grenoble 9, FranceINIFAP, Cenid Raspa, Gomez Palacio 35071, Dgo, MexicoUJF, LTHE, F-38041 Grenoble 9, FranceIMTA, CTH, Jiutepec 62560, Morelos, MexicoUJF, IGA, F-38041 Grenoble 9, FranceDescroix, L, IRD, LTHE, Domaine Univ,BP 53, F-38041 Grenoble 9, France TI - An experimental analysis of hydrodynamic behaviour on soils and hillslopes in a subtropical mountainous environment (Western Sierra Madre, Mexico) AB - Many soils parameters and features play a role in explaining the hydrodynamic behaviour of a watershed. Textural data are relatively easy to obtain and to spatialise, due to their low spatial variability. Inversely, structural features usually exhibit great spatial variability and thus, are difficult to interpolate and to integrate in the framework of a hydrologic model. However, structural characteristics of the soils seem to have a greater influence on catchment hydrological balance than the textural ones. The objectives of this study were to identify which parameters control the soil surface hydrological behaviour and quantify the magnitude of their spatial variability. Measurements of soils characteristics, including bulk density and hydraulic conductivity, were carried out in five watersheds in the Western Sierra Madre (Northern Mexico). It is shown in this study that on a natural grassland under subtropical mountainous climate, spatial variability of soil hydraulic conductivity is almost as high at a 1-m(2) scale as at a 1-km(2) one. The main discriminating variables which account for the spatial variability appeared to be the lithology and overall the soil surface features, both being related. The latter seems to be a synthetic indicator of basin hydrodynamic behaviour, and to be easier than others to spatialise. (C) 2002 Published by Elsevier Science B.V MH - France MH - Mexico|Durango MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000177786500001 L2 - spatial variability;hydraulic conductivity;Western Sierra Madre;surface features;Hortonian runoff;SATURATED HYDRAULIC CONDUCTIVITY; SPATIAL VARIABILITY; TENSION INFILTROMETERS; SURFACE-FEATURES; ROCK FRAGMENTS; INFILTRATION; VEGETATION; RUNOFF; SORPTIVITY; AFRICA SO - Journal of Hydrology 2002 ;266(1-2):1-14 5267 UI - 10763 AU - Dhaliwal HS AU - Harjit S AU - William M AD - Punjab Agr Univ, Dept Genet & Biotechnol, Ludhiana 141004, Punjab, IndiaCIMMYT, Appl Biotechnol Ctr, Mexico City, DF, MexicoDhaliwal, HS, Punjab Agr Univ, Dept Genet & Biotechnol, Ludhiana 141004, Punjab, India TI - Transfer of rust resistance from Aegilops ovata into bread wheat (Triticum aestivum L.) and molecular characterisation of resistant derivatives AB - An interspecific cross was made to transfer leaf rust and stripe rust resistance from an accession of Aegilops ovata (UUMM) to susceptible Triticum aestivum (AABBDD) cv. WL711. The F-1 was backcrossed to the recurrent wheat parent, and after two to three backcrosses and selfing, rust resistant progenies were selected. The C-banding study in a uniformly leaf rust and stripe rust resistant derivative showed a substitution of the 5M chromosome of Ae. ovata for 5D of wheat. Analysis of rust resistant derivatives with mapped wheat microsatellite makers confirmed the substitution of 5M for 5D. Some of these derivatives also possessed one or more of the three alien translocations involving 1BL, 2AL and 5BS wheat chromosomes which could not be detected through C-banding. A translocation involving 5DS of wheat and the substituted chromosome 5M of Ae. ovata was also observed in one of the derivatives. Susceptibility of this derivative to leaf rust showed that the leaf rust resistance gene(s) is/are located on short arm of 5M chromosome of Ae. ovata. Though the Ae. ovata segment translocated to 1BL and 2AL did not seem to possess any rust resistance gene, the alien segment translocated to 5BS may also possess gene(s) for rust resistance. The study demonstrated the usefulness of microsatellite markers in characterisation of interspecific derivatives MH - India MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000176811300001 L2 - microsatellite markers;Puccinia recondita f.sp tritici;Puccinia striiformis;rust resistance;wheat;INSITU HYBRIDIZATION; LEAF RUST; CHROMATIN SO - Euphytica 2002 ;126(2):153-159 5268 UI - 10913 AU - Di Carlo E AU - Massi F AU - Valentini G AU - Di Paola A AU - D'Alessio F AU - Brocato E AU - Guidubaldi D AU - Dolci M AU - Pedichini F AU - Speziali R AU - Li Causi G AU - Garatti ACO AU - Cappellaro E AU - Turatto M AU - Arkharov AA AU - Gnedin Y AU - Larionov VM AU - Benetti S AU - Pastorello A AU - Aretxaga I AU - Chavushyan V AU - Vega O AU - Danziger IJ AU - Tornambe A AD - Osservatorio Astron Collurania Teramo, I-64100 Teramo, ItalyOsserv Astron Roma, I-00040 Rome, ItalyOsserv Astron Padova, I-35122 Padua, ItalyCent Astron Observ Pulkovo, St Petersburg 196140, RussiaSt Petersburg Univ, Inst Astron, St Petersburg, RussiaIsaac Newton Inst Chile, St Petersburg Branch, St Petersburg, RussiaTelescopio Nazl Galileo, E-38700 Santa Cruz De La Palma, Canary Isl, SpainIst Nacl Astrofis Opt & Elect, Puebla, MexicoOsserv Astron Trieste, I-34131 Trieste, ItalyDi Carlo, E, Osservatorio Astron Collurania Teramo, Via M Maggini, I-64100 Teramo, Italy TI - Optical and infrared observations of the supernova SN 1999e1 AB - Optical and near-infrared light curves of the Type IIn supernova SN 1999el in NGC 6951 are presented. A period of 220 days ( 416 days in the near-infrared) is covered from the first observation obtained a few days before maximum light. Spectroscopic observations are also discussed. Using as a distance calibrator the Type Ia SN 2000E, which occurred some months later in the same galaxy, and fitting a blackbody law to the photometric data, we obtain a maximum bolometric luminosity for SN 1999el of similar to10(44) ergs s(-1). In general, the photometric properties of SN 1999el are very similar to those of SN 1998S, a bright and well-studied Type IIn supernova, showing a fast decline in all observed bands similar to those of Type II-L supernovae. The differences with SN 1998S are analyzed and ascribed to the differences in a preexisting circumstellar envelope in which dust was already present at the moment of the SN outburst. We infer that light echoes may play a possibly significant role in affecting the observed properties of the light curves, although improved theoretical models are needed to account for the data. We conclude that mass loss in the progenitor RG stars is episodic and occurs in an asymmetric way. This implies that collapsing massive stars appear as normal Type IIn supernovae if this occurs far from major mass-loss episodes, whereas they appear as Type IIn supernovae if a large mass-loss episode is in progress MH - Italy MH - Mexico|Puebla MH - Russia MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176340400015 L2 - galaxies : individual (NGC 6951);infrared : stars;supernovae : general;supernovae : individual (SN 1999e1);GALAXY NGC-6951; STANDARD STARS; II SUPERNOVAE; PHOTOMETRY; 1988Z; WIND; RADIOACTIVITY; CALIBRATION; EMISSION; SN1998S SO - Astrophysical Journal 2002 ;573(1):144-156 5269 UI - 10716 AU - Dias WS AU - Alessi BS AU - Moitinho A AU - Lepine JRD AD - Univ Sao Paulo, Dept Astron, BR-01060970 Sao Paulo, BrazilUNAM, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoDias, WS, Univ Sao Paulo, Dept Astron, CP 3386, BR-01060970 Sao Paulo, Brazil TI - New catalogue of optically visible open clusters and candidates AB - We have compiled a new catalogue of open clusters in the Galaxy which updates the previous catalogues of Lynga (1987) and of Mermilliod (1995) (included in the WEBDA database). New objects and new data, in particular, data on kinematics (proper motions) that were not present in the old catalogues, have been included. Virtually all the clusters (1537) presently known were included, which represents an increment of about 347 objects relative to the Lynga (1987) catalogue. The catalogue is presented in a single table containing all the important data, which makes it easy to use. The catalogue can be accessed on line either at http://www.astro.iag.usp.br/(similar to)wilton/ or as an electronic table which will be made available at the CDS MH - Brazil MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 114 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000176877800017 L2 - galaxy : open clusters and associations : general;catalogs;PROPER MOTIONS; STAR-CLUSTERS; SEARCH SO - Astronomy & Astrophysics 2002 ;389(3):871-873 5270 UI - 10415 AU - Diaz D AU - Geonel RG AU - Vazquez-Olmos A AU - Nemeth J AU - Dekany I AD - Univ Nacl Autonoma Mexico, Dept Chem, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoUniv Szeged, Dept Colloid Chem, H-6720 Szeged, Hungary TI - Synthesis of ZnO nanoparticles from spontaneous alkaline hydrolysis of zinc carboxylate salts in polar organic media MH - Hungary MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000177422301759 SO - Abstracts of Papers of the American Chemical Society 2002 ;224():U334-U334 5271 UI - 10337 AU - Diaz F AU - Sierra E AU - Re AD AU - Rodriguez L AD - CICESE, Dept Biotecnol Marina, Ensenada, Baja California, MexicoCICESE, Dept Acuicultura, Ensenada, Baja California, MexicoUniv Juarez Autonoma Tabasco, Div Acad Ciencias Biol, Villahermosa, Tabasco, MexicoDiaz, F, CICESE, Dept Marine Biotechnol, POB 434844, San Diego, CA 92143 USA TI - Behavioural thermoregulation and critical thermal limits of Macrobrachium acanthurus (Wiegman) AB - (1) The preferred temperatures of Macrobrachium acanthurus were determined for prawns acclimated to 20degreesC, 23degreesC, 26degreesC, 29degreesC and 32degreesC, and the final preferendum estimate was (29.5degreesC). (2) The critical thermal minima (CTMin) and maxima (CTMax) were 11.0degreesC, 12.1degreesC, 13.0degreesC and 14.8degreesC, and 34.2degreesC, 35.0degreesC, 36.1degreesC and 39.8degreesC, respectively. (3) The zone of thermal tolerance assessed using the CTMin and CTMax boundaries was 644degreesC(2). (4) The acclimation response ratio was between 0.33 and 0.62. (5) To cultivate this species in the southeastern region of Mexico it should be done in not <15degreesC (CTMin) during the winter and below 38degreesC in summer (CTMax). (C) 2002 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Tabasco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Biology;Zoology U5 - J;Article AV - English IS - 0306-4565 UR - ISI:000177739300013 L2 - preferred temperature;acute method;critical thermal minima and maxima;acclimation response ratio;Macrobrachium acanthurus;PROCAMBARUS-CLARKII DECAPODA; ORCONECTES-RUSTICUS; TEMPERATURE; ACCLIMATION; CRAYFISH; PREFERENDUM; CAMBARIDAE SO - Journal of Thermal Biology 2002 ;27(5):423-428 5272 UI - 10293 AU - Diaz FJ AU - Farfan-Ale JA AU - Olson KE AU - Lorono-Pino MA AU - Gubler DJ AU - Blair CD AU - Black WC AU - Beaty BJ AD - Colorado State Univ, Dept Microbiol, Arthropod Borne & Infect Dis Lab, Ft Collins, CO 80523, USAUniv Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Merida 97000, Yucatan, MexicoCtr Dis Control & Prevent, Div Vector Borne Dis, Natl Ctr Infect Dis, Ft Collins, CO 80523, USADiaz, FJ, Colorado State Univ, Dept Microbiol, Arthropod Borne & Infect Dis Lab, Foothills Res Campus,3107 Rampart Rd, Ft Collins, CO 80523 USA TI - Genetic variation within the premembrane coding region of dengue viruses from the Yucatan peninsula of Mexico AB - Single-strand conformation polymorphism (SSCP) and sequence analyses were used to characterize genetic polymorphisms and phylogenetic relationships, respectively, among dengue (DEN) viruses isolated between 1980 and 1997 from Yucatan, Mexico and surrounding states. Amplified cDNAs from the premembrane (prM) coding region of the DEN viruses were characterized by SSCP. There were six distinct haplotypes of DEN-1 viruses, four haplotypes of DEN-2, four haplotypes of DEN-3, and eight haplotypes of DEN-4. The diversity index for DEN-3 isolates was significantly lower than that of the other serotypes, probably reflecting the recent introduction of this viral serotype into Mexico. The SSCP was a sensitive (84.5%) and specific (95.5%) technique for identifying nucleotide substitutions. Sequence analyses provided insight into the phylogenetic relationships of the DEN strains isolated in Yucatan. One DEN-2 isolate from 1996 was demonstrated to cluster with viruses of the Sri Lanka genotype, none of which have been detected before in the Americas MH - USA MH - Mexico|Yucatan PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000178069600015 L2 - STRAND CONFORMATION POLYMORPHISMS; HEMORRHAGIC-FEVER; MOLECULAR EVOLUTION; EPIDEMIOLOGY; DNA; SEQUENCE; TYPE-1; RISK; RNA SO - American Journal of Tropical Medicine and Hygiene 2002 ;67(1):93-101 5273 UI - 9624 AU - Diaz SC AU - Therrell MD AU - Stahle DW AU - Cleaveland MK AD - Ctr Invest Biol Noroeste, La Paz 23090, Baja California, MexicoUniv Arkansas, Dept Geosci, Fayetteville, AR 72701, USADiaz, SC, Ctr Invest Biol Noroeste, Mar Bermejo 195,Col Playa Palo Santa Rita,PB 128, La Paz 23090, Baja California, Mexico TI - Chihuahua (Mexico) winter-spring precipitation reconstructed from tree-rings, 1647-1992 AB - The state of Chihuahua lies in an and to semiarid zone in the NW central plain of Mexico. Its agricultural economy is highly vulnerable to frequent droughts. In this study, we reconstruct winter-spring precipitation from 1647-1992 using 6 earlywood width chronologies of Douglas fir from around Chihuahua. The tree-ring data explain 56% of the winter-spring precipitation variance in a linear regression for 1949-1992, and there is strong correlation between the tree-ring reconstructed precipitation data and the observed precipitation data not used for calibration (r = 0.74, p < 0.01). The 5 driest years in the reconstructed precipitation record were 1974, 1954, 1742, 1980, and 1820 in order of severity, and the longest dry period in the 346 yr record lasted about 17 yr (1948-1964) during the severe 1950s drought that also affected the SW United States. The reconstructed precipitation record has a statistically significant 4 yr spectral peak in the El Ni (n) over tilde $o/Southern Oscillation (ENSO) frequency band and is significantly correlated with indices of ENSO (tropical rainfall index; r = 0.58, p = 0.001). The correlation between the ENSO and Chihuahuan reconstructed precipitation varied in strength when computed for non-overlapping 18 yr sub-periods (ranging from r = 0.43 to r = 0.68), which may reflect changes in the ENSO teleconnection to climate in northern Mexico MH - Mexico|Baja California MH - USA PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 11 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0936-577X UR - ISI:000179675900005 L2 - Chihuahua;Mexico;reconstructed precipitation;tree-ring chronologies;earlywood;Douglas fir;ENSO tropical rainfall index;SOUTHERN OSCILLATION SO - Climate Research 2002 ;22(3):237-244 5274 UI - 10145 AU - DiCesare D AU - Dupont HL AU - Mathewson JJ AU - Ashley D AU - Martinez-Sandoval F AU - Pennington JE AU - Porter SB AD - Univ Texas, Houston Sch Publ Hlth, Houston, TX, USAUniv Texas, Sch Med, Houston, TX, USABaylor Coll Med, Houston, TX 77030, USAMinist Hlth, Western Hlth Area Adm, Montego Bay, JamaicaUniv Autonoma Guadalajara, Guadalajara, Jalisco, MexicoShaman Pharmaceut Co, San Francisco, CA, USADuPont, HL, St Lukes Episcopal Hosp, 6720 Bertner Ave,MC 1-164, Houston, TX 77030 USA TI - A double blind, randomized, placebo-controlled study of SP-303 (Provir) in the symptomatic treatment of acute diarrhea among travelers to Jamaica and Mexico AB - OBJECTIVE: The study was designed to evaluate the effectiveness of SP-303 (Provir), a plant-derived product with novel antisecretory properties, in the treatment of travelers diarrhea. METHODS: A total of 184 persons from the United States who acquired diarrhea in Jamaica or Mexico were enrolled in a double-blind, placebo-controlled study examining the effectiveness of three doses of SP-303 in reducing illness. Subjects were treated with 125 mg, 250 mg, or 500 mg SP-303 or a matching placebo four times a day for 2 days. Subjects kept daily diaries of symptoms and were seen each day for 3 days. Of the subjects, 169 (92%) were included in the efficacy analysis. RESULTS: The most common etiological agent identified was enterotoxigenic Escherichia coli, found in 19% of subjects. The mean time interval from taking the first dose of medication until passage of the last informed stool during 48 h therapy (TLUS48) was 38.7 h for the placebo group. TLUS48 was shortened by SP-303: 30.6 h for the 125-mg dose group (p = 0.005); 30.3 h for the 250-mg group; and 32.6 h for the 500-mg group (p = 0.01). Treatment failures were seen in 29.3% in the placebo group compared with 7.3% (p = 0.01), 4.3 (p = 0.002), and 9.8 (p = 0.026) in the three treatment groups. SP-303 was well tolerated at all doses. CONCLUSIONS: SP-303 was effective in shortening the duration of travelers' diarrhea by 21%. This antisecretory approach works directly against the pathophysiology of travelers' diarrhea and is not likely to potentiate invasive forms of diarrhea or to produce posttreatment constipation MH - Jamaica MH - Mexico|Jalisco MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0002-9270 UR - ISI:000178504800018 L2 - INTESTINAL ELECTROLYTE TRANSPORT; LOPERAMIDE; INHIBITOR; THERAPY; DISEASE SO - American Journal of Gastroenterology 2002 ;97(10):2585-2588 5275 UI - 11197 AU - Dikranjan D AU - Tkachenko M AD - Univ Udine, Dipartimento Matemat & Informat, I-33100 Udine, ItalyUniv Autonoma Metropolitana, Dept Matemat, Mexico City, DF, MexicoDikranjan, D, Univ Udine, Dipartimento Matemat & Informat, Via Sci 206, I-33100 Udine, Italy TI - Varieties generated by countably compact Abelian groups AB - We prove under the assumption of Martin's Axiom that every precompact Abelian group of size less than or equal to 2N(0) belongs to the smallest class of groups that contains all Abelian countably compact groups and is closed under direct products, taking closed subgroups and continuous isomorphic images MH - Italy MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000175300300040 L2 - countably compact;precompact;sequentially complete;variety of topological groups;Martin's Axiom;TOPOLOGICAL-GROUPS SO - Proceedings of the American Mathematical Society 2002 ;130(8):2487-2496 5276 UI - 9680 AU - Diop CAK AU - Bassene S AU - Sidibe M AU - Sarr AD AU - Diop L AU - Molloy KC AU - Mahon MF AU - Toscano RA AD - Univ Cheikh Anta Diop, Fac Sci & Tech, Dept Chem, Lab Chim Mineral & Analyt,LACHIMIA, Dakar, SenegalUniv Bath, Dept Chem, Bath BA2 7AY, Avon, EnglandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoDiop, CAK, Univ Cheikh Anta Diop, Fac Sci & Tech, Dept Chem, Lab Chim Mineral & Analyt,LACHIMIA, Dakar, Senegal TI - Synthesis, characterization and X-ray structures of catena triphenyltin(IV) benzenesulphonate, catena-trimethyltin(IV) methylphosphonate and catena-trimethyltin(IV) phenylarsenate AB - The crystal and spectroscopic characterization of three triorganotin derivatives, namely [Ph3SnO3SPh](n), [Me3SnO2P(OH)(Me)](n) and [Me3SnO2As(OH)(Ph)](n) are reported. In each case the structure consists of one- or three-dimensional, polymeric chains involving R3Sn (R = Me, Ph) moieties axially bridged through either benzenesulphonato, methylphosphonato or phenylarsonato ligands. The tin atoms in each case are in a trans-O2SnC3 trigonal bipyramidal environment. Hydrogen bonds ensure the compactness of the structures of the methylphosphonato and phenylarsonato derivatives MH - United Kingdom MH - Mexico|Distrito Federal MH - Senegal PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0334-7575 UR - ISI:000179594200007 L2 - CRYSTAL-STRUCTURE; MOSSBAUER; ORGANOTIN; CHEMISTRY; NMR; IR SO - Main Group Metal Chemistry 2002 ;25(11):683-689 5277 UI - 10838 AU - Diop CAK AU - Diop L AU - Toscano AR AD - Univ Cheikh Anta Diop, Fac Sci & Tech, Dept Chim, LACHIMIA, Dakar, SenegalUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoDiop, L, Univ Cheikh Anta Diop, Fac Sci & Tech, Dept Chim, LACHIMIA, Dakar, Senegal TI - Synthesis, characterization and X-ray structure of polymeric [triphenyltin(IV)][aquatriphenyltin(IV)] sulphate, [(Ph3Sn)(H2OSnPh3)SO4](n) AB - Triphenyltin([V)][aquatriphenyltin(IV)] sulphate has been synthesized and its structure determined by X-ray diffraction. In the crystal, Ph3Sn units are bridged together in polymeric chains by means of the sulpha le anions, each poly hate being also bonded to another Ph3SnOH2 group, sulphate being to two different trigonal bipyramidal O2SnC3 moieties. Cross-linking is provided by hydrogen bonds between the water molecules' of one chain and the fourth oxygen atom of the sulphates of adjacent chains MH - Mexico|Distrito Federal MH - Senegal PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0334-7575 UR - ISI:000176468200018 SO - Main Group Metal Chemistry 2002 ;25(5):327-+ 5278 UI - 9285 AU - Dixon T AU - Decaix J AU - Farina F AU - Furlong K AU - Malservisi R AU - Bennett R AU - Suarez-Vidal F AU - Fletcher J AU - Lee J AD - Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149, USAPenn State Univ, Dept Geosci, Geodynam Res Grp, University Pk, PA 16802, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACent Washington Univ, Dept Geol Sci, Ellensburg, WA, USACtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoDixon, T, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Seismic cycle and rheological effects on estimation of present-day slip rates for the Agua Blanca and San Miguel-Vallecitos faults, northern Baja California, Mexico AB - [1] Geodesy can be used to infer long-term fault slip rates, assuming a model for crust and upper mantle rheology. We examine the sensitivity of fault slip rate estimates to assumed rheology for the Agua Blanca and San Miguel-Vallecitos faults in northern Baja California, Mexico, part of the Pacific-North America plate boundary zone. The Agua Blanca fault is seismically quiet, but offset alluvial fans indicate young activity. Current seismicity is confined to the nearby San Miguel-Vallecitos fault, a small offset fault better aligned with plate motion. GPS measurements between 1993 and 1998 suggest that both faults are active, with a combined slip rate of 4-8 mm yr(-1) regardless of rheological model. However, slip rate estimates for the individual faults are sensitive to assumed rheology. Elastic half-space models yield 2-3 mm yr(-1) for the Agua Blanca fault, and somewhat faster rates for the San Miguel-Vallecitos fault, 2-4 mm yr(-1), with uncertainties of about 1 mm yr(-1). Models incorporating viscoelastic rheology and seismic cycle effects suggest a faster slip rate for the Agua Blanca fault, 6 +/- 1 mm yr(-1), and a slower rate for the San Miguel-Vallecitos fault, 1 +/- 1 mm yr(-1), in better agreement with geological data, but these rates are sensitive to assumed rheology. Numerical simulations with a finite element model suggest that for similar rheological and friction conditions, slip on the San Miguel-Vallecitos fault should be favored due to better alignment with plate motion. Long-term faulting processes in the larger offset Agua Blanca fault may have lowered slip resistance, allowing accommodation of motion despite misalignment with plate motion MH - USA MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000180525500020 L2 - fault slip rates and the seismic cycle;northern Baja California;POSITIONING SYSTEM CONSTRAINTS; SOUTHERN CALIFORNIA; POSTSEISMIC RELAXATION; SURFACE DEFORMATION; EARTHQUAKE CYCLE; TENSILE FAULTS; ANDREAS FAULT; HALF-SPACE; MOTION; MODEL SO - Journal of Geophysical Research-Solid Earth 2002 ;107(B10): 5279 UI - 10300 AU - Diyadi J AU - Amechnoue K AU - Hlou L AU - Moatadid A AD - Univ Ibn Tofail, Lab Tech Numer Sci Appliquees, Fac Sci, Mexico City 14000, DF, MexicoUniv Mohammed 5, Lab Elect & Traitement Signal, Fac Sci, Rabat, MoroccoDiyadi, J, Univ Ibn Tofail, Lab Tech Numer Sci Appliquees, Fac Sci, BP 133, Mexico City 14000, DF, Mexico TI - Modeling multi-band effects of hot electron coupled transport in n-GaAs AB - We use a full band iterative matrix method to study the high-field transport in n-type GaAs for the first time using three non-parabolic valleys (IF, L, and X). The new simulation of transient electrons in GaAs shows that, even if there exist carriers in the X-valley beginning from an electric field E = 10 kV/cm, the two-valley model (IF and L) remains still valid until E = 20 kV/cm. We present results for the distribution functions, in the transient and permanent regimes in GaAs in the Gamma-, L-, and X-valleys, for electric fields in the range 1 to 60 kV/cm. These functions allow to calculate all parameters of the first order in both regimes. We obtain good agreement with the experimental velocity-field curves MH - Mexico|Distrito Federal MH - Morocco PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000177907700014 L2 - EQUATION; CARRIERS; VELOCITY SO - Physica Status Solidi B-Basic Research 2002 ;232(2):323-329 5280 UI - 11115 AU - Doffinger R AU - Dupuis S AU - Picard C AU - Fieschi C AU - Feinberg J AU - Barcenas-Morales G AU - Casanova JL AD - Necker Med Sch, Lab Human Genet Infect Dis, F-75015 Paris, FranceUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Lab Immunol Coordinac Estudios Posgrad, Mexico City 54700, DF, MexicoCasanova, JL, Necker Med Sch, Lab Human Genet Infect Dis, 156 Rue Vaugirard, F-75015 Paris, France TI - Inherited disorders of IL-12-and IFN gamma-mediated immunity: a molecular genetics update AB - In the last 6 years, considerable advances have been made in the molecular analysis of a rare clinical syndrome: Mendelian susceptibility to mycobacterial disease (MSMD). Infection with poorly virulent environmental non-tuberculous mycobacteria (NTM) or vaccination with bacillus Calmette-Guerin (BCG) may cause disseminating and even fatal disease in individuals suffering from this syndrome. Mutations in five genes (IFNGR1, IFNGR2, STAT1, IL12B and IL12RB1) have been shown to be responsible for MSMD and further allelic heterogeneity accounts for the existence of nine distinct inherited disorders. All of these disorders are caused by impaired IFNgamma-mediated immunity. These results have important medical and biological implications. In this report, we update the disease-causing mutations reported in the literature. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 32 U4 - Biochemistry & Molecular Biology;Immunology U5 - J;Article AV - English IS - 0161-5890 UR - ISI:000175631700006 L2 - IFN gamma;IL-12;mycobacteria;CALMETTE-GUERIN INFECTION; AVIUM COMPLEX INFECTION; INTERFERON-GAMMA; MYCOBACTERIAL INFECTION; RECEPTOR DEFICIENCY; INTERLEUKIN-12; SUSCEPTIBILITY; MUTATION; CHILD; CHAIN SO - Molecular Immunology 2002 ;38(12-13):903-909 5281 UI - 11267 AU - Dolan BP AU - O'Connor D AU - Presnajder P AD - CINVESTAV, Dept Fis, Mexico City 0730, DF, MexicoNUI, Dept Math Phys, Maynooth, Kildare, IrelandComenius Univ, Dept Theoret Phys, Bratislava 84215, SlovakiaDolan, BP, CINVESTAV, Dept Fis, Apartado Postal 70-543, Mexico City 0730, DF, Mexico TI - Matrix phi(4) models on the fuzzy sphere and their continuum limits AB - We demonstrate that the UV/IR mixing problems found recently for a scalar phi(4) theory on the fuzzy sphere are localized to tadpole diagrams and can be overcome by a suitable modification of the action. This modification is equivalent to normal ordering the phi(4) vertex. In the limit of the commutative sphere, the perturbation theory of this modified action matches that of the commutative theory MH - Ireland MH - Mexico|Distrito Federal MH - Slovakia PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 23 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000175277100013 L2 - renormalization regularization and renormalons;field theories in lower dimensions;non-commutative geometry;QUANTUM-FIELD THEORY; NONCOMMUTATIVE GEOMETRY; REGULARIZATION; PHYSICS; U(1) SO - Journal of High Energy Physics 2002 ;(3): 5282 UI - 11456 AU - Dominguez-Jimenez C AU - Sancho D AU - Nieto M AU - Montoya MC AU - Barreiro O AU - Sanchez-Madrid F AU - Gonzalez-Amaro R AD - Univ Autonoma Madrid, Serv Immunol, Hosp Princesa, Madrid 28006, SpainUniv Autonoma San Luis Potosi, Fac Med, Dept Immunol, San Luis Potosi, MexicoSanchez-Madrid, F, Univ Autonoma Madrid, Serv Immunol, Hosp Princesa, Diego de Leon 62, Madrid 28006, Spain TI - Effect of pentoxifylline on polarization and migration of human leukocytes AB - Leukocyte polarization has a key role in the induction and effector phases of immune response. We assessed the effect of pentoxifylline on the polarization mid migration of human lymphocytes anti neutrophills. A dose-dependeut, inhibitory effect on the polarization of lymphoid cells induced by chemokines or IL-15 was found. In addition, PTX interfered with the chemotaxis of peripheral blood T cells and T lymphoblasts. A similar effect was observed: on the transendothelial migration of these cells. In addition, the polarization of neutrophils, its adherence to endothelium, and their transendothelial migration, induced by different stimuli, were inhibited by PTX. By contrast. this drug had only a mild effect on endothelial cells and a partial inhibition on the induction of expression by TNF-alpha. The inhibitory ef-ICAM-1 feet of PTX on leukocyte polarization and extravasation may contribute significantly to the anti-inflammatory and immunoregulatory activity of this drug MH - Mexico|San Luis Potosi MH - Spain PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 24 U4 - Cell Biology;Hematology;Immunology U5 - J;Article AV - English IS - 0741-5400 UR - ISI:000174807800005 L2 - T lymphocytes;neutrophils;chemotaxis;chemokines;HUMAN T-LYMPHOCYTES; P-SELECTIN; ADHESION MOLECULES; ENDOTHELIAL-CELLS; ANTIINFLAMMATORY DRUGS; EXPRESSION; NEUTROPHILS; CHEMOKINES; CHEMOTAXIS; MECHANISM SO - Journal of Leukocyte Biology 2002 ;71(4):588-596 5283 UI - 11434 AU - Dominguez-Salazar E AU - Portillo W AU - Baum MJ AU - Bakker J AU - Paredes RG AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, MexicoBoston Univ, Dept Biol, Boston, MA 02215, USAParedes, RG, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Apartado Postal 1-1141, Queretaro 76001, Mexico TI - Effect of prenatal androgen receptor antagonist or aromatase inhibitor on sexual behavior, partner preference and neuronal Fos responses to estrous female odors in the rat accessory olfactory system AB - Many socially relevant odors are detected in rodent species by the vomeronasal organ and subsequently processed by the accessory olfactory system (AOS). We previously found that gonadectomized male and female rats treated in adulthood with testosterone propionate (TP) showed equivalent Fos responses in the AOS to odors derived from estrous females. Likewise, in contrast with numerous other mammalian species, gonadectomized female rats show surprisingly high levels of male-typical mounting behavior in response to adult TP. We tested the hypothesis that prenatal testosterone (T) exposure, acting via androgen receptors (ARs) or via estrogen receptors, masculinizes the AOS in rats of both sexes. Pregnant dams were treated with either the AR blocker, Flutamide, the aromatase inhibitor, 1,4,6-androstatriene-3,17-dione (ATD), or nothing (control) to assess the role of prenatal androgen and estradiol receptor activation, respectively, in this masculinization. Beginning at birth, male and female offspring were injected subcutaneously (sc) every other day with either ATD, (pre- and neonatal ATD group) or oil vehicle (Flutamide and control groups) until postnatal Day 12. Subjects were gonadectomized as adults, hormonally treated and tested for different behaviors before having their AOS Fos responses to estrous female odors assessed. Prenatal treatment with Flutamide (but not ATD) significantly decreased anogenital distance and severely impaired intromissive and ejaculatory behaviors in males tested after TP replacement without disrupting mounting capacity in either sex. Pre- and neonatal treatment with ATD, (but not Flutamide) enhanced lordosis responsiveness in males tested after se injections of estradiol and progesterone, whereas these perinatal treatments had no effect on any aspect of masculine coital performance in either sex. After TP treatment, male and female control subjects preferred to approach a tethered stimulus female as opposed to a male, and prenatal Flutamide or perinatal ATD treatments did not modify this pattern of partner preference. Neuronal Fos responses to estrous odors were (as in previous studies) identical in the AOS of gonadectomized TP-treated control males and females. Prenatal Flutamide or perinatal ATD treatments failed to disrupt consistently this profile of Fos responses to estrous odors in the AOS of rats of either sex. These behavioral and neuroanatomical findings raise the possibility that the similar level of male-typical responsiveness to social odors that occurs in male and female rats after adult TP treatment results from nonsteroid-hormone-dependent, species-specific factors that act perinatally in the brains of rats of both sexes. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000174883600010 L2 - accessory olfactory system (AOS);1,4,6-androstatriene-3,17-dione (ATD);flutamide;partner preference;estrous odors;Fos responses;MEDIAL AMYGDALOID NUCLEUS; TREATED MALE-RATS; C-FOS; CHEMOSENSORY STIMULATION; DIFFERENTIAL PROJECTIONS; SYRIAN-HAMSTERS; PREOPTIC AREA; TESTOSTERONE; EXPRESSION; BULB SO - Physiology & Behavior 2002 ;75(3):337-346 5284 UI - 10527 AU - Dominguez H AU - Velasco E AU - Alejandre JA AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Madrid, Fac Ciencias, Dept Fis Teor Mat Condensada, E-28049 Madrid, SpainAlejandre, JA, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Av San Rafael Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Stress anisotropy in liquid crystalline phases AB - Monte Carlo simulations of bulk liquid crystals in the isotropic, nematic and smectic phases were performed. The simulations were carried out using different box shapes. The diagonal components of the pressure tensor were calculated to verify that the system is in mechanical equilibrium. For simulations in cubic boxes it was found that the three components of the pressure tensor had the same values in the isotropic and nematic phases but they were different in the smectic phase, i.e. the system seemed to be under anisotropic stress. NVT and NPT simulations in the smectic phase were performed by allowing the box sides to fluctuate independently; in this case, the average diagonal components of the pressure tensor had the same value. Inaccurate calculation of the total pressure produces incorrect equilibrium boundaries in the phase diagram. Microphases and poorly defined layering can be found in simulations of smectic phases when they are performed on cubic boxes. Although the pressure anisotropy is relaxed out, the layering structure in smectic phases seems to depend on the initial configuration, regardless of the simulation method MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177250400017 L2 - GAY-BERNE MESOGEN; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; CONSTANT-PRESSURE; MODEL; BEHAVIOR; SYSTEMS; FLUID SO - Molecular Physics 2002 ;100(16):2739-2744 5285 UI - 10523 AU - Dominy NJ AU - Lucas PW AU - Ramsden LW AU - Riba-Hernandez P AU - Stoner KE AU - Turner IM AD - Univ Chicago, Dept Ecol & Evolut, Chicago, IL 60637, USAUniv Hong Kong, Dept Anat, Hong Kong, Hong Kong, Peoples R ChinaUniv Hong Kong, Dept Bot, Hong Kong, Hong Kong, Peoples R ChinaUniv Costa Rica, Escuela Biol, San Jose, Costa RicaUNAM, Dept Recursos Nat, Inst Ecol, Morelia 58089, Michoacan, MexicoSingapore Bot Gardens, Singapore 259569, SingaporeDominy, NJ, Univ Chicago, Dept Ecol & Evolut, 1101 E 57th St, Chicago, IL 60637 USA TI - Why are young leaves red? MH - Costa Rica MH - USA MH - Mexico|Michoacan MH - Peoples R China MH - Singapore PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 16 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000177271600017 L2 - RAIN-FOREST; COLOR-VISION; TROPICAL FOREST; HERBIVORY; LIGHT; EVOLUTION; PHENOLOGY; DEFENSE; TREES SO - Oikos 2002 ;98(1):163-176 5286 UI - 12022 AU - Donchev V AU - Saraydarov M AU - Shtinkov N AU - Germanova K AU - Vlaev SJ AD - Univ Sofia, Fac Phys, Sofia 1164, BulgariaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, MexicoDonchev, V, Univ Sofia, Fac Phys, 5 Blvd J Bourchier, Sofia 1164, Bulgaria TI - Diffused GaAs/AlGaAs quantum wells with equidistant electronic states AB - An alternative way to obtain quantum wells (QWs) with equidistant energy levels is proposed. It consists of interface grading of an initially rectangular QW induced by material interdiffusion. The latter can be realised for example by post-annealing. The electronic states in a large number of interdiffused GaAs/AlGaAs QWs are studied by varying the well width and diffusion length. The calculations are made by means of the envelope function approximation. It is shown that a nearly equidistant energy spectrum can be obtained in diffused QWs (DQWs) by choosing an appropriate value of the initial QW width and by adjusting the diffusion length. The annealing times and temperatures of the sample resulting in the needed diffusion lengths are calculated and reasonable values are obtained. (C) 2002 Elsevier Science B.V. All rights reserved MH - Bulgaria MH - Mexico|Zacatecas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000173080700028 L2 - interdiffusion;GaAs/AlGaAs quantum wells;equidistant energies;diffusion length SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2002 ;19(1-2):135-138 5287 UI - 9499 AU - Dong SH AU - Gu XY AU - Ma ZQ AU - Dong SS AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Mexicano Petr, Program Ingenieria Mol, Mexico City 07730, DF, MexicoDalian Univ, Ctr Computat, Dalian 116622, Peoples R ChinaDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - Exact solutions of the Dirac equation with a Coulomb plus scalar potential in 2+1 dimensions AB - The exact solutions of the (2+1)-dimensional Dirac equation with a Coulomb potential and a scalar one axe analytically presented by studying the second-order differential equations obtained from a pair of coupled first-order. ones. The eigenvalues are studied in some detail MH - Mexico|Distrito Federal MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0218-3013 UR - ISI:000180099900004 L2 - Dirac equation;Coulomb and scalar potentials;two dimensions SO - International Journal of Modern Physics E-Nuclear Physics 2002 ;11(6):483-489 5288 UI - 10235 AU - Dong SH AD - Kansas State Univ, Dept Phys, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Kansas State Univ, Dept Phys, Cardwell Hall, Manhattan, KS 66506 USA TI - The ansatz method for analyzing Schrodinger's equation with three anharmonic potentials in D dimensions AB - In this letter, by applying a suitable ansatz to the wave functions, the solutions of the D-dimensional radial Schrodinger equation with some anharmonic potentials are obtained MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0894-9875 UR - ISI:000178125100006 L2 - D-dimensional Schrodinger equation;anharmonic potentials;wave functions ansatz;ANALYTIC CONTINUED FRACTIONS; QUANTUM-MECHANICS; SINGULAR ANHARMONICITIES; STATES; V(R)=AR(2)+BR(-4)+CR(-6) SO - Foundations of Physics Letters 2002 ;15(4):385-395 5289 UI - 10943 AU - Dong SH AU - Ma ZQ AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - Algebraic approach to the pseudoharmonic oscillator in 2D AB - A realization of the ladder operators for the solutions to the Schrodinger equation with a pseudoharmonic oscillator in 2D is presented. It is shown that those operators satisfy the commutation relations of an SU(1, 1) algebra. Closed analytical expressions are evaluated for the matrix elements of some operators r(2) and rpartial derivative/partial derivativer MH - Mexico|Distrito Federal MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 14 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0218-3013 UR - ISI:000176180300006 L2 - pseudoharmonic oscillator;ladder operators;SU(1,1) algebra SO - International Journal of Modern Physics E-Nuclear Physics 2002 ;11(2):155-160 5290 UI - 11134 AU - Dong SH AU - Ma ZQ AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaKansas State Univ, Dept Phys, Manhattan, KS 66506, USAUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - The (2+1) Dirac equation with a delta potential AB - In this Letter the bound states of (2+1) Dirac equation with the cylindrically symmetric delta(r - r(0)) potential are discussed. It is surprisingly found that the relation between the radial functions at two sides of r(0) can be established by an SO(2) transformation. We obtain a transcendental equation for calculating the energy of the bound state from the matching condition in the configuration space. The condition for existence of bound states is determined by the Sturm-Liouville theorem MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0894-9875 UR - ISI:000175629000004 L2 - Dirac equation;delta potential;SO(2) transformation SO - Foundations of Physics Letters 2002 ;15(2):171-178 5291 UI - 11245 AU - Dong SH AD - Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, EnglandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England TI - On the solutions of the Schrodinger equation with some anharmonic potentials: Wave function Ansatz AB - By applying an ansatz to the wave function. the solutions of the D-dimensional radial Schrodinger equation with some anharmonic potentials are obtained. The restriction on the parameters of the given potential and eta are also presented, where eta depends on a linear combination of the angular momentum quantum number l and the spatial dimensions D MH - United Kingdom MH - Mexico|Distrito Federal PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-8949 UR - ISI:000175278500001 L2 - QUANTUM-MECHANICS; STATES; V(R)=AR(2)+BR(-4)+CR(-6) SO - Physica Scripta 2002 ;65(4):289-295 5292 UI - 11367 AU - Dong SH AU - Ma ZQ AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - The hidden symmetry for a quantum system with an infinitely deep square-well potential AB - An infinitely deep square-well potential is studied by an SU(11,) algebra, not by an SO(2) algebra. The creation and annihilation operators for the system are obtained from the factorization method. Closed analytical expressions for the matrix elements of some relevant functions are evaluated. (C) 2002 American Association of Physics Teachers MH - Mexico|Distrito Federal MH - Peoples R China PB - MELVILLE: AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0002-9505 UR - ISI:000175207000013 SO - American Journal of Physics 2002 ;70(5):520-521 5293 UI - 11381 AU - Dong SH AU - Ma ZQ AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoChina Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R ChinaDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - Nonrelativistic levinson's theorem in D dimensions AB - The Levinson theorem for the Schrodinger equation with a spherically symmetric potential in D dimensions is uniformly established by the Sturm-Liouville theorem. It is shown that the Levinson theorem for the cases without a half bound state does not depend on the spatial dimension D, namely, the phase-shift delta(l)(0) of the scattering state with angular momentum l at zero momentum is equal to the total number n(l) of bound states multiplied by pi. When a half bound state occurs the Levinson theorem may be modified MH - Mexico|Distrito Federal MH - Peoples R China PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000174978600084 L2 - KLEIN-GORDON EQUATION; ENERGY WAVE-FUNCTIONS; 2 DIMENSIONS; SCHRODINGER-EQUATION; DIRAC PARTICLES; THRESHOLD BEHAVIOR; SCATTERING SYSTEMS; INVERSE SCATTERING; NODAL STRUCTURE; PHASE-SHIFTS SO - Physical Review A 2002 ;65(4): 5294 UI - 11984 AU - Dong SH AD - Phys & Theoret Chem Lab, Oxford OX1 3QZ, EnglandUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SH, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England TI - Quantum monodromy in the spectrum of Schrodinger equation with a decatic potential AB - In this study the spectral problem of the two-dimensional Schrodinger equation with the cylindrically symmetrical decatic potential is carried out. The concept of quantum monodromy is introduced to give insight into the energy levels of system with this potential. It is shown that quantum monodromy occurs at rho = 0 in the distribution of eigenstates around a critical point on the spectrum at E = 0 with zero angular momentum, such that there can be no smoothly valid assignment of quantum number. Cases with the three-well and four-well potentials are presented to give rise to the double degeneracies with respect to energy except for the angular momentum m = 0 MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000173288700006 L2 - ANALYTIC CONTINUED FRACTIONS; ANHARMONIC-OSCILLATOR; BOUND-STATES; SINGULAR ANHARMONICITIES; CHAMPAGNE BOTTLE; WAVE-EQUATION; MECHANICS; SYSTEMS; V(R)=AR(2)+BR(-4)+CR(-6); EIGENVALUES SO - International Journal of Theoretical Physics 2002 ;41(1):89-99 5295 UI - 9735 AU - Dong SS AU - Dong SH AD - Dalian Univ Technol, Ctr Comp, Dalian 116622, Peoples R ChinaUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SS, Dalian Univ Technol, Ctr Comp, Dalian 116622, Peoples R China TI - Schrodinger equation with a Coulomb field in 2+1 dimensions AB - The solutions of the two-dimensional Schrodinger equation with a Coulomb potential are briefly studied and compared with those of the Klein-Gordon case studied in this work. The eigenvalues and the normalized eigenfunctions are analytically obtained. The fine structure of the energy level for this system is also discussed MH - Mexico|Distrito Federal MH - Peoples R China PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-8949 UR - ISI:000179465400002 L2 - HYDROGEN-ATOM SO - Physica Scripta 2002 ;66(5):342-344 5296 UI - 10124 AU - Dong SS AU - Dong SH AD - Dalian Univ, Ctr Computat, Dalian 116622, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SS, Dalian Univ, Ctr Computat, Dalian 116622, Peoples R China TI - A realization of dynamic group for an electron in a uniform magnetic field AB - The eigenvalues and eigenfunctions of the Schrodinger equation with a non-relativistic electron in a uniform magnetic field are presented. A realization of the creation and annihilation operators for the radial wave-functions is carried out. It is shown that these operators satisfy the commutation relations of an SU(l, 1) group. Closed analytical expressions are evaluated for the matrix elements of different functions rho(2) and rhod/dp MH - Mexico|Distrito Federal MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0218-3013 UR - ISI:000178432700001 L2 - SU(1,1) group;matrix elements;ladder operators SO - International Journal of Modern Physics E-Nuclear Physics 2002 ;11(4):265-271 5297 UI - 10706 AU - Dong SS AU - Dong SH AD - Dalian Univ, Ctr Computat, Dalian 116622, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDong, SS, Dalian Univ, Ctr Computat, Dalian 116622, Peoples R China TI - An alternative approach to study the dynamical group for the modified Poschl-Teller potential AB - The properties of the modified Poschl-Teller potential are outlined. The ladder operators are constructed directly from the wave functions without introducing any auxiliary variable. It is shown that these operators are associated to the SU(2) algebra. Analytical expressions for the functions sinh(alphax) and (1/alpha) cosh(alphax)d/dx are evaluated from these ladder operators. The harmonic limit for this system is discussed. The expansion of the coordinate x and the momentum (p) over cap from the operators of the SU(2) are also obtained MH - Mexico|Distrito Federal MH - Peoples R China PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000176901500003 L2 - Poschl-Teller potential;SU(2) group;algebraic approach;MORSE OSCILLATOR; SCATTERING; ALGEBRAS; MODEL SO - Czechoslovak Journal of Physics 2002 ;52(6):753-764 5298 UI - 11006 AU - Dopita MA AU - Groves BA AU - Sutherland RS AU - Binette L AU - Cecil G AD - Australian Natl Univ, Inst Adv Studies, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599, USADopita, MA, Australian Natl Univ, Inst Adv Studies, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611, Australia TI - Are the narrow-line regions in active galaxies dusty and radiation pressure dominated? AB - The remarkable similarity between emission spectra of narrow-line regions ( NLRs) in Seyfert galaxies has long presented a mystery. In photoionization models, this similarity implies that the ionization parameter is nearly always the same, about U similar to 0.01. Here we present dusty, radiation pressure dominated photoionization models that can provide natural physical insight into this problem. In these models, dust and the radiation pressure acting upon it provide the controlling factor in moderating the density, excitation, and surface brightness of photoionized NLR structures. Additionally, photoelectric heating by the dust is important in determining the temperature structure of the models. These models can also explain the coexistence of the low-, intermediate-, and coronal ionization zones within a single self-consistent physical structure. The radiation pressure acting on dust may also be capable of driving the fast (similar to3000 km s(-1)) outflows such as are seen in the HST observations of NGC 1068 MH - Australia MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 45 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176071200007 L2 - galaxies : active;galaxies : Seyfert;ISM : general;line : formation;GALACTIC NUCLEI; SEYFERT-GALAXIES; PHYSICAL CONDITIONS; CIRCINUS GALAXY; SIZE DISTRIBUTION; SHOCKS; GAS; CLOUDS; PHOTOIONIZATION; SPECTROSCOPY SO - Astrophysical Journal 2002 ;572(2):753-761 5299 UI - 9928 AU - Dossenbach M AU - Brunner E AU - Levitt L AU - Becker S AU - Sammut K AU - Madrigal L AU - Roque A AD - Eli Lilly Ges MBH, Vienna, AustriaEli Lilly, W Ryde, AustraliaEli Lilly, Mexico City, DF, MexicoHosp Psiquiatr Cruz Norte, Dept Psychiat, Hermosillo, Sonora, MexicoSanatorios Mexico SA CV, Dept Psychiat, Puebla, Mexico TI - Sexual dysfunction during treatment of schizophrenia: A largely underestimated problem? Baseline results from the 3-year intercontinental schizophrenia outpatient health outcomes (IC-SOHO) study MH - Australia MH - Austria MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0924-977X UR - ISI:000178905000479 SO - European Neuropsychopharmacology 2002 ;12():S317-S318 5300 UI - 9802 AU - Dostal J AU - Caby R AU - Keppie JD AU - Maza M AD - St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaUniv Montpellier 2, Lab Tectonophys, F-34095 Montpellier 05, FranceUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Bejaia, Dept Geol, Bejaia 06000, AlgeriaDostal, J, St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, Canada TI - Neoproterozoic magmatism in Southwestern Algeria (Sebkha el Melah inlier): a northerly extension of the Trans-Saharan orogen AB - The Neoproterozoic Sebkha el Melah inlier is a part of the Pan-African Trans-Saharan orogenic belt that is exposed in northwestern Africa east of the West African craton. The inlier is composed of a 4-5 km thick sequence of fine-grained marine to fluvial elastic sedimentary rocks intercalated with, and conformably overlain by, mafic lava flows and proximal volcaniclastic deposits, 600-1000 m thick. The lava flows and associated minor intrusives are mainly shoshonites. Their geochemical characteristics are indicative of subduction-related magmas and are characterized by relative depletion of Nb, Ta and Ti with respect to rare-earth elements and Th. Their positive but highly variable epsilon(Nd) values (+1-+5) are interpreted to reflect contamination of mantle-derived mafic melts (similar to+6) by continental crust. It is suggested that the Sebkha el Melah shoshonitic rocks formed in a backarc or rifted arc setting. Their location, close to the Trans-Saharan suture, is interpreted to be the result of subduction erosion which removed the forearc and possibly also part of the arc. The shallow source (<60 km) for the Sebkha el Melah volcanic rocks is related to flat-slab subduction. Traced along strike to the south, the >620 Ma, Neoproterozoic volcanic suites of the Trans-Saharan belt change to typical continental, Andean margin catc-alkaline rocks in the northwestern Hoggar and an oceanic island arc complex in Mali. This may indicate that the rate of convergence of the West African craton and the Tuareg (Saharan) paleocontinent increased from south to north due to a change in the angle of convergence across the margin (oblique in the south to orthogonal in the north), resulting from the curve of the eastern margin of the West African craton that swings from N-S to NW-SE. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Algeria MH - Canada MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0899-5362 UR - ISI:000179302000004 L2 - neoproterozoic;orogenic belt;metavolcanic rocks;ABITIBI GREENSTONE-BELT; OCEANIC ISLAND-ARC; CONVERGENT MARGIN; SUPERIOR-PROVINCE; VOLCANIC-ROCKS; GEOCHEMISTRY; CANADA; MANTLE; MALI; PETROGENESIS SO - Journal of African Earth Sciences 2002 ;35(2):213-225 5301 UI - 9524 AU - Draayer JP AU - Hirsch JG AU - Popa G AU - Pan F AU - Stoitcheva G AU - Georgieva AI AU - Sviratcheva KD AD - Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70808, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoRochester Inst Technol, Dept Phys, Rochester, NY 14623, USALiaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R ChinaBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, BulgariaDraayer, JP, Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70808 USA TI - Novel applications of group theory in nuclear physics MH - USA MH - Bulgaria MH - Mexico|Distrito Federal MH - Peoples R China PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7796 UR - ISI:000179894600006 L2 - HEAVY DEFORMED-NUCLEI; MEAN-FIELD; SCISSORS MODE; SHELL-MODEL; DEFORMATIONS; STATES; ER-168; BODY SO - Physics of Particles and Nuclei 2002 ;33():S25-S36 5302 UI - 9094 AU - Drdla K AU - Gandrud BW AU - Baumgardner D AU - Wilson JC AU - Bui TP AU - Hurst D AU - Schauffler SM AU - Jost H AU - Greenblatt JB AU - Webster CR AD - NASA, Ames Res Ctr, Moffett Field, CA 94035, USANatl Ctr Atmospher Res, Boulder, CO 80307, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Denver, Denver, CO, USANOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80303, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USABay Area Environm Res Inst, Sonoma, CA, USAPrinceton Univ, Program Atmospher & Ocean Sci, Princeton, NJ 08544, USANASA, Jet Propuls Lab, Pasadena, CA, USADrdla, K, NASA, Ames Res Ctr, Moffett Field, CA 94035, USA TI - Evidence for the widespread presence of liquid-phase particles during the 1999-2000 Arctic winter AB - In situ Multiangle Spectrometer Probe (MASP) particle measurements have been analyzed to determine the typical behavior of sulfate particles during the SAGE III Ozone Loss and Validation Experiment (SOLVE) campaign. The study has explored variations in the total particle concentration measured by MASP. A new analysis method has been developed in which increases of the MASP concentration can be interpreted as growth of small particles (those which are smaller than 0.2 mum in radius at midlatitudes). The method also allows all of the MASP measurements made during the SOLVE campaign to be incorporated in a single analysis. At all levels of the stratosphere, the total MASP concentration (and therefore aerosol growth) varies continuously with temperature. This behavior is well-reproduced by assuming that the sulfate aerosols are liquid solutions, but cannot be reproduced if the aerosol is assumed to be frozen. At sufficiently cold temperatures, larger increases in the MASP concentration are consistently seen; the observed onset temperature for this growth is in good agreement with model expectations for liquid ternary solutions. Liquid-like behavior is apparent for all measurements made in the Arctic during SOLVE, both inside and outside the vortex, and even at the coldest temperatures sampled during the campaign. At the levels with the coldest measured temperatures, which cause maximum particle sizes and thus the greatest total MASP concentrations, 90% of the particles grow as liquids. Therefore, the freezing that occurred during the 1999-2000 Arctic winter was selective, with most of the particles remaining liquid even in the presence of a small number of frozen particles MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000181256100001 L2 - sulfate aerosol;freezing;polar stratospheric clouds;stratosphere;Arctic;POLAR STRATOSPHERIC CLOUDS; OBSERVED SANDWICH STRUCTURE; SULFURIC-ACID TETRAHYDRATE; NITRIC-ACID; LIDAR OBSERVATIONS; VAPOR-PRESSURES; INSITU MEASUREMENTS; SIZE DISTRIBUTIONS; SULFATE AEROSOLS; LOW-TEMPERATURES SO - Journal of Geophysical Research-Atmospheres 2002 ;108(D5): 5303 UI - 9668 AU - Drever MJ AD - William Osler Hlth Ctr, Tijuana, MexicoGrp Zendo, Tijuana, MexicoDrever, MJ, 135 Queens Plate Dr, Toronto, ON M9W 6V1, Canada TI - Unilateral absence of the external oblique muscle with hypoplasia of the rectus abdominis muscle in a patient with Poland syndrome MH - Canada MH - Mexico|Baja California PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Surgery U5 - J;Letter AV - English IS - 0032-1052 UR - ISI:000179622400032 SO - Plastic and Reconstructive Surgery 2002 ;110(7):1802-1803 5304 UI - 11987 AU - Duarte-Mermoud MA AU - Castro-Linares R AU - Castillo-Facuse A AD - Univ Chile, Dept Elect Engn, Santiago, ChileIPN, CINVESTAV, Dept Elect Engn, Mexico City 07300, DF, MexicoDuarte-Mermoud, MA, Univ Chile, Dept Elect Engn, Av Tupper,Casilla 412-3, Santiago, Chile TI - Direct passivity of a class of MIMO non-linear systems using adaptive feedback AB - In this paper, an adaptive controller with adaptive laws specially designed is proposed to solve the problem of making a multi-input multi-output (MIMO) non-linear system, with explicit linear parametric uncertainty, equivalent to a passive system. These results are an extension of those obtained by the authors for the SISO case. Some stability issues associated to the resultant closed-loop passive system are also discussed. The results obtained are applied to models of dynamical MIMO systems, to illustrate the controller design methodology MH - Chile MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000173236300003 L2 - CASCADED NONLINEAR-SYSTEMS; GLOBAL STABILIZATION SO - International Journal of Control 2002 ;75(1):23-33 5305 UI - 10238 AU - Dubroeucq D AU - Geissert D AU - Barois I AU - Ledru MP AD - IRD, F-93143 Bondy, FranceInst Ecol AC, Xalapa 91000, Veracruz, MexicoDubroeucq, D, IRD, 32 Ave H Varagnat, F-93143 Bondy, France TI - Biological and mineralogical features of Andisols in the Mexican volcanic higlands AB - In the montane grasslands of Mexico, perennial grass and black Andisols are linked in a complex mechanism of soil formation in which both biogenic and mineral products interact. In this ecosystem, typical of the volcanic highlands, a sequence of profiles has been studied by macro- and micromorphology, scanning and transmission electron microscopy (TEM), infra-red spectroscopy of soil samples and humic acid (HA) extracts, radiocarbon dating and pollen record, soil moisture and available water determinations and soil water analyses. The grass Muhlenbergia macroura is important in the soil-forming process as it is the host of micro- and meso-fauna which produce abundant organic micro-aggregates. Soil formation began 7550 years ago and continued through several climatic and vegetation changes. The soil thickens as its age increases. Mineral neoformation is oriented towards allophane and halloysite, rather than Al-rich minerals such as imogolite and gibbsite, and high Si contents are observed in the soil water. The black Andisols have high water and carbon storage capacities and play a prominent role in regulating drainage. Present-day destruction of the grassland for potato cultivation will decrease the water reserve of these volcanic highlands. (C) 2002 Elsevier Science B.V All rights reserved MH - France MH - Mexico|Veracruz PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary;Soil Science;Water Resources U5 - J;Article AV - English IS - 0341-8162 UR - ISI:000178240200001 L2 - soil formation;grassland ecosystem;andisols;ASH SOILS; SPECTROSCOPY SO - Catena 2002 ;49(3):183-202 5306 UI - 9512 AU - Duch A AU - Martinez C AD - LANIA, Xalapa, Veracruz, Mexico. Univ Politecn Catalunya, Dept Llenguatges & Sistemes Informat, E-08034 Barcelona, Spain TI - On the average performance of orthogonal range search in multidimensional data structures AB - In this work we present the average-case analysis of orthogonal range search for several multidimensional data structures. We first consider random relaxed K-d trees as a prototypical example. Later we extend these results to many different multidimensional data structures. We show that the performance of range searches is related to the performance of a variant of partial matches using a mixture of geometric and combinatorial arguments. This reduction simplifies the analysis and allows us to give exact lower and upper bounds for the performance of range searches. Furthermore, under suitable conditions ("small range queries"), we can also get a very precise asymptotic estimate for the expected cost of range searches MH - Mexico|Veracruz MH - Spain T3 - AUTOMATALecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBV79X AV - English IS - 0302-9743 UR - ISI:000180069500044 SO - 2002 ;():514-524 5307 UI - 10173 AU - Duch A AU - Martinez C AD - Univ Politecn Catalunya, Dept Lienguatges Sist Informat, E-08034 Barcelona, SpainLANIA, Xalapa, Veracruz, MexicoMartinez, C, Univ Politecn Catalunya, Dept Lienguatges Sist Informat, E-08034 Barcelona, Spain TI - On the average performance of orthogonal range search in multidimensional data structures AB - In this work we present the average-case analysis of orthogonal range search for several multidimensional data structures. We first consider random relaxed K-d trees as a prototypical example. Later we extend these results to many different multidimensional data structures. We show that the performance of range searches is related to the performance of a variant of partial matches using a mixture of geometric and combinatorial arguments. This reduction simplifies the analysis and allows us to give exact upper and lower bounds for the performance of range searches (Theorems 3 and 4) and a useful characterization of the cost of range search as a sum of the costs of partial match-like operations (Theorem 5). Using these results, we can act very precise asymptotic estimates for the expected cost of range searches (Theorem 6). (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Veracruz MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0196-6774 UR - ISI:000178289900010 L2 - orthogonal range search;multidimensional data structures;multidimensional search;partial match search;K-d trees;quadtrees;average-case analysis;K-D TREES SO - Journal of Algorithms 2002 ;44(1):226-245 5308 UI - 8924 AU - Duggan C AU - Rizzo C AU - Cooper A AU - Klavon S AU - Fuchs V AU - Gura K AU - Richardson D AU - Collier S AU - Lo C AD - Childrens Hosp, Clin Nutr Serv, Div Gastroenterol & Nutr, Boston, MA 02115, USAChildrens Hosp, Clin Res Program, Boston, MA 02115, USAChildrens Hosp, Qualit Improvement Risk Management Dept, Boston, MA 02115, USAAmer British Hosp, Mexico City, DF, MexicoMexicos Gen Hosp, Mexico City, DF, MexicoPenn State Univ, Coll Med, University Pk, PA 16802, USADuggan, C, Childrens Hosp, Clin Nutr Serv, Div GI Nutr, 300 Longwood Ave, Boston, MA 02115 USA TI - Effectiveness of a clinical practice guideline for parenteral. nutrition: A 5-year follow-up study in a pediatric teaching hospital AB - Objective: To determine the effectiveness of a clinical practice guideline (CPG) on the use of parenteral nutrition (PN) at a tertiary care pediatric hospital. Methods: Review of prospectively collected data on hospital-wide PN use 2 years before and 5 years after the establishment of the CPG. Effectiveness of the CPG was measured as the percentage of PN courses lasting fewer than 5 days and the number of PN starts per 1000 patient days. Results: During the study period, 5745 PN courses were administered. The mean (SD) number of PN starts per 1000 inpatient days was 8.86 (0.78) before the CPG and 9.54 (2.49) afterwards (p = .28), The percentage courses of PN lasting for fewer than 5 days declined from 26.3% before the CPG to 18.4% afterwards (p < .0001). A multivariate model confirmed that the rate of short-term PN starts declined after the CPG was issued. The mean (SD) number of PN courses shorter than 5 days in the 2 years before the CPG was 2.33 (0.42) per 1000 patient days versus 1.75 (0.45) in the 5 years after the CPG was instituted (p = .005), which is a 25% decline. The services with the highest volume of PN use showed the most significant decreases in short-term PN use. A cost savings to the hospital of more than $50,000 may have been realized. Conclusions: In a large pediatric tertiary care hospital, a CPG was successfully deployed. CPGs can favorably affect the use rates and costs of parenteral nutrition MH - USA MH - Mexico|Distrito Federal PB - SILVER SPRING: AMER SOC PARENTERAL & ENTERAL NUTRITION RP - NOT IN FILE U3 - TC 6 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0148-6071 UR - ISI:000181548900012 L2 - INAPPROPRIATE USE; SUPPORT; CARE; ECONOMICS; QUALITY; BOWEL SO - Journal of Parenteral and Enteral Nutrition 2002 ;26(6):377-381 5309 UI - 10378 AU - Dumas M AU - Lozano R AU - Fauvet MC AU - Martin H AU - Scholl PC AD - Queensland Univ Technol, Brisbane, Qld 4005, AustraliaInst Tecnol Monterrey, Mexico City, DF, MexicoUniv Grenoble, LSR IMAG, F-38402 St Martin Dheres, FranceDumas, M, Queensland Univ Technol, GPO Box 2434, Brisbane, Qld 4005, Australia TI - A sequence-based object-oriented model for video databases AB - Structuration, annotation and composition are amidst the most crucial modeling issues that video editing and querying in the context of a database entail. In this paper, we propose a sequence-based, object-oriented data model that addresses them in an unified, yet orthogonal way. Thanks to this orthogonality, the interactions between these three aspects are properly captured, i.e., annotations may be attached to any level of video structuration, and all the composition operators preserve the structurations and annotations of the argument videos. We also propose to query both the structuration and the annotations of videos using an extension of ODMG's OQL which integrates a set of algebraic operators on sequences. The overall proposal is formalized and implemented on top of an object-oriented DBMS MH - Australia MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Information Systems;Computer Science, Software Engineering;Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1380-7501 UR - ISI:000177697800004 L2 - video databases;temporal databases;object-oriented databases;ODMG;QUERY SO - Multimedia Tools and Applications 2002 ;18(3):249-277 5310 UI - 9611 AU - Dumont HJ AU - Nandini S AU - Sarma SSS AD - State Univ Ghent, Lab Anim Ecol, B-9000 Ghent, BelgiumNatl Autonomous Univ Mexico, Tlalnepantla 54090, Mexico, MexicoDumont, HJ, State Univ Ghent, Lab Anim Ecol, Ledegancsktraat 35, B-9000 Ghent, Belgium TI - Cyst ornamentation in aquatic invertebrates: a defence against egg-predation AB - Eggs, including encysted embryos (cysts) of aquatic invertebrates may not only be thick-walled, but also provided with various external ornamentations such as spines and honeycombings. We argue that these provide protection, additional to that of the walls themselves, against invertebrate predators, and test this idea by offering intact (honeycombed) and decapsulated cysts of Chirocephalus diaphanus to the carnivorous flatworm Mesostoma sp. Except at the lowest density of cysts, when intact as well as decapsulated cysts seem to be poorly detected by the (tactile?) searching system of the flatworms, intact cysts were relatively immune from predation. Similar causes elicit similar responses: the defences that occur in eggs are essentially similar to those present in adults of rotifers and various branchiopod microcrustaceans, copepods (marine species), and ostracods. Circumstantial evidence suggests that egg defences may vary in intensity with predation pressure. In some cases, they might be predator-inducible MH - Belgium MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000179641100016 L2 - egg defences;egg predation;inducible morphologies;rotifers;Anomopoda;Anostraca;Copepoda;Ostracoda;Heterocypris;CRUSTACEA; DAPHNIA; BRANCHIOPODA; ANOSTRACA; COPEPOD; GENERA SO - Hydrobiologia 2002 ;486(1):161-167 5311 UI - 11460 AU - Dumont HJ AU - Briano MS AU - Babu KKS AD - State Univ Ghent, Inst Anim Ecol, B-9000 Ghent, BelgiumUniv Autonoma Aguascalientes, Ctr Ciencias Basicas, Dept Biol, Aguascalientes 20100, MexicoChristian Coll, Dept Zool, Irinjalakuda 680125, Kerala, IndiaDumont, HJ, State Univ Ghent, Inst Anim Ecol, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - A re-evaluation of the Macrothrix rosea-triserialis group, with the description of two new species (Crustacea Anomopoda : Macrothricidae) AB - We redescribe Macrothrix rosea (females and males) based on material collected in Belgium. We also compare seven populations of Macrothrix `triserialis' from different parts of the world, including a topotypical population of M. triserialis s. str. from Sri Lanka, and males from South India (here first described), relying heavily on the structure of the trunk limbs, beside classical features of morphology. M. rosea and M. triserialis are extremely closely related: males are easily separated, but the identification of females requires micro-characters such as the relative length of the apical segment of the setae natatoriae and the adornment of the first antenna and of the longest swimming seta of the antenna. M. rosea and triserialis together constitute a sub-group of the rosea-group. Macrothrix triserialis-like animals occur in the tropical-subtropical belts of four continents. We compare populations from Asia, South America and Africa, and find differences in microcharacters of the trunk limbs, but cannot decide whether these represent random variation or sound taxonomical differences. One of the basic characters of the Macrothrix rosea-triserialis subgroup is that the setae natatoriae of the postabdomen are implanted on a prominence, the `heel'. Other characters include the fact that the Fryer' forks are adorned with one or two big teeth only, and that the scrapers of trunk limb two form a row of eight without any doublings. Possibly, scraper five, and scraper four to a lesser degree has an enlarged subapical tooth. The exopodite of trunk limb three has four plumose setae, the back and front row of the endopodite six setae and/or receptors, the exopodite of trunk limb four has two setae, and the back row of the endopodite six setae, plus one on the gnathobase. The pre-epipodite of trunk limb five consists of three lobes, the `endopodite' is small, and the `exopodite' is reduced to a single seta. The male postabdomen has a tubular ending, without true end-claws, although a rudiment of an end-claw is seen in M. triserialis. Two new species are described: M. tabrizensis and M. agsensis. A comparison, including the males of Macrothrix triserialis, M. rosea, M. smirnovi and M. tabrizensis confirms the relationship of all these taxa, but also reveals a morphological series in the shape of the postabdomen, from a complete absence of end-claws, over rudiments of a pair of end-claws, to complete endclaws. Absence of end-claws is here considered to represent an evolved character state. Macrothrix smirnovi Ciros & Elias (1987) is less closely related to the rosea-triserialis group, and is considered to form a sub-group in its own right. It shows a short `heel' on the postabdomen, but carries a supplementary seta behind scraper 4 of the endopodite of trunk limb two, and has a male with a postabdomen that closely resembles that of the female. These are primitive characters, which are also found in Wlassicsia, Bunops and Onchobunops and provide a possible phylogenetic link between Macrothrix and these three genera, although the genetic distance between them is considered to be quite large MH - Belgium MH - India MH - Mexico|Aguascalientes PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000174759600001 L2 - Cladocera;Macrothricidae;taxonomy;males;trunk limbs;species groups and subgroups;world distribution;REDESCRIPTION SO - Hydrobiologia 2002 ;467(1-3):1-44 5312 UI - 10141 AU - Dumonteil E AU - Gourbiere S AU - Barrera-Perez M AU - Rodriguez-Felix E AU - Ruiz-Pina H AU - Banos-Lopez O AU - Ramirez-Sierra MJ AU - Menu F AU - Rabinovich JE AD - Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Parasitol Lab, Merida 97000, Yucatan, MexicoUniv Lyon 1, Lab Biometrie & Biol Evolut, CNRS, UMR 5558, F-69622 Villeurbanne, FranceUniv Nacl La Plata, Ctr Estudios Parasitol & Vectores, La Plata, Buenos Aires, ArgentinaDumonteil, E, Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Parasitol Lab, Ave Itzaes 490 59, Merida 97000, Yucatan, Mexico TI - Geographic distribution of Triatoma dimidiata and transmission dynamics of Trypanosoma cruzi in the Yucatan Peninsula of Mexico AB - Chagas disease represents a major public health concern in most of Latin America, and its control is currently based on vector control and blood bank screening. We investigated the geographic distribution and seasonal variations in triatomine populations in the Yucatan peninsula of Mexico to obtain entomologic data for the optimization of potential control programs. We collected domiciliated and peri-domiciliated Triatoma dimidiata from 115 houses in 23 villages distributed throughout most of the peninsula. A high abundance of bugs was observed in the northern part of the peninsula, indicating a prioritary area for vector control. Part of this distribution could be attributed to the type of vegetation. We also documented strong seasonal variations in T. dimidiata populations, with a higher abundance during the hot and dry season in April-June. These variations, associated with reduced year-round colonization of houses and the analysis of developmental stage structure, suggest that flying adults seasonally invading houses may play a larger role than domiciliated bugs in transmission of Trypanosoma cruzi to humans. The importance of this transmission dynamics may not be limited to the Yucatan peninsula, but may be a general mechanism contributing to natural transmission that should be taken into account in other regions for the design and optimization of control strategies MH - Argentina MH - France MH - Mexico|Yucatan PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 24 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000178479700011 L2 - CHAGAS-DISEASE; POPULATION-STRUCTURE; VECTOR CONTROL; INFESTANS; BRAZIL; HOUSES; AMAZON; STATE SO - American Journal of Tropical Medicine and Hygiene 2002 ;67(2):176-183 5313 UI - 10075 AU - Duncan NJ AU - Thrush MA AU - Elliott JAK AU - Bromage NR AD - CIAD, Unidad Mazatlan, Mazatlan, Sinaloa, MexicoTerregles Salmon, Dumfries, ScotlandUniv Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandDuncan, NJ, CIAD, Unidad Mazatlan, AP 711, Mazatlan, Sinaloa, Mexico TI - Seawater growth and maturation of Atlantic salmon (Salmo solar) transferred to sea at different times during the year AB - The use of photoperiod manipulation to alter the timing of seawater transfer of groups of salmon is a now common farming practice in Scotland. The present study was undertaken to examine and compare the seawater performance of out-of-season smolts with in-season smolts. A total of 12 groups were transferred to three different sea sites during May, June (three controls), January, March, October and November (nine out-of-season groups). At the two commercial sites, production times were similar ranging from 16 to 19 months to produce market-sized fish ranging from 2.3 to 3.8 kg. Different growth profiles were observed between groups and it was considered that this may be the result of the different photoperiod and temperature profiles experienced by the fish when transferred from the hatchery to the sea site. Percentage maturation in the different groups ranged from 9.2% to 98%. Maturation clearly increased with increasing growing period prior to the completion of maturation and two sites exhibited regressions (coefficient of determination R-2 = 0.64 and 0.98) between percentage maturation and days from transfer to completion of maturation. The data from this study show the performance of out-of-season smolts with emphasis on growth and maturation. Overall growth is similar to natural smolts and maturation can be reduced or increased depending on transfer date. This information provides the salmon industry the opportunity to produce a year round supply of marketable fish of consistent size and quality. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Sinaloa MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000178515500022 L2 - seawater growth;maturation;Atlantic salmon;Salmo solar;DIFFERENT PHOTOPERIODS; SALAR SMOLTS; MELATONIN; AGE SO - Aquaculture 2002 ;213(1-4):293-309 5314 UI - 10099 AU - Dunn GH AU - Belic DS AU - Cisneros C AU - Crandall DH AU - Falke RA AU - Gregory D AD - Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309, USANatl Inst Stand & Technol, Boulder, CO 80309, USAUniv Belgrade, Fac Phys, YU-11001 Belgrade, YugoslaviaUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoUS DOE, Washington, DC 20545, USAOptometrix Inc, Seattle, WA 98058, USAOak Ridge Natl Lab, Oak Ridge, TN 37831, USADunn, GH, Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA TI - Absolute emission cross sections for electron-impact excitation of the 3p-3s transition in Al2+ AB - Crossed beams of electrons and Al2+ ions combined with fluorescence detection were used to measure the absolute cross section for electron-impact excitation of the ions to yield 186.3 nm and 185.5 nm photons from the 3s-3p transition. The measured cross section near the 6.7 eV threshold energy is about 16x10(-16) cm(2), and some resonance structure near threshold is indicated. Total relative uncertainties (1sigma) are typically about 6%, to be combined with an 11% absolute calibration uncertainty. Total uncertainties at high confidence level (90%) are around 20%, using a coverage factor of 1.7. Comparisons made with various theoretical calculations, specifically distorted wave and nine-state close coupling, show better agreement of experimental values with distorted wave calculations, with the measured values being higher near threshold than the most recent close-coupling calculations MH - Mexico|Morelos MH - USA MH - Yugoslavia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000178382500065 L2 - SODIUM ISOELECTRONIC SEQUENCE; ENERGY-LOSS TECHNIQUE; MERGED-BEAMS METHODS; 2S-2P EXCITATION; POLARIZATION; COLLISION; IONS SO - Physical Review A 2002 ;66(3): 5315 UI - 9284 AU - Dunne GV AU - Gies H AU - Schubert C AD - Univ Connecticut, Dept Phys, Storrs, CT 06269, USACERN, Div Theory, CH-1211 Geneva 23, SwitzerlandUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoCalif Inst Phys & Astrophys, Palo Alto, CA 94306, USADunne, GV, Univ Connecticut, Dept Phys, Storrs, CT 06269, USA TI - Zero modes, beta functions and IR/UV interplay in higher-loop QED AB - We analyze the relation between the short-distance behavior of quantum field theory and the strong-field limit of the background field formalism, for QED effective lagrangians in self-dual backgrounds, at both one and two loop. The self-duality of the background leads to zero modes in the case of spinor QED, and these zero modes must be taken into account before comparing the perturbative beta function coefficients and the coefficients of the strong-field limit of the effective lagrangian. At one-loop this is familiar from instanton physics, but we find that at two-loop the role of the zero modes, and the interplay between IR and UV effects in the renormalization, is quite different. Our analysis is motivated in part by the remarkable simplicity of the two-loop QED effective lagrangians for a self-dual constant background, and we also present here a new independent derivation of these two-loop results MH - Mexico|Michoacan MH - Switzerland MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 4 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000180642700032 L2 - renormalization regularization and renormalons;renormalization group;nonperturbative effects;ENERGY-MOMENTUM-TENSOR; YANG-MILLS THEORY; QUANTUM ELECTRODYNAMICS; PSEUDOPARTICLE FIELDS; GAUGE-THEORY; VACUUM; QCD; AMPLITUDES; QUARKS; TRACE SO - Journal of High Energy Physics 2002 ;(11): 5316 UI - 9862 AU - Dunne GV AU - Schubert C AD - Univ Connecticut, Dept Phys, Storrs, CT 06269, USAUniv Michoacana San Nicolas de Hildalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoBoston Univ, Dept Math, Ctr Math Phys, Boston, MA 02215, USACalif Inst Phys & Astrophys, Palo Alto, CA 94306, USADunne, GV, Univ Connecticut, Dept Phys, Storrs, CT 06269, USA TI - Two-loop self-dual Euler-Heisenberg lagrangians 1. Real part and helicity amplitudes AB - We show that, for both scalar and spinor QED, the two-loop Euler-Heisenberg effective lagrangian for a constant euclidean self-dual background has an extremely simple closed-form expression in terms of the digamma function. Moreover, the scalar and spinor QED effective lagrangians are very similar to one another. These results are dramatic simplifications compared to the results for other backgrounds. We apply them to a calculation of the low energy limits of the two-loop massive N-photon 'all +' helicity amplitudes. The simplicity of our results can be related to the connection between self-duality, helicity and supersymmetry MH - Mexico|Michoacan MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 8 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000178999500053 L2 - renormalization regularization and renormalons;nonperturbative effects;electromagnetic processes and properties;STRONG MAGNETIC-FIELD; YANG-MILLS THEORY; STRING-INSPIRED FORMALISM; GAUGE-THEORIES; QUANTUM FLUCTUATIONS; QCD AMPLITUDES; EXTERNAL-FIELD; VACUUM; BREMSSTRAHLUNG; DIAGRAMS SO - Journal of High Energy Physics 2002 ;(8): 5317 UI - 10438 AU - Dunne GV AU - Schubert C AD - Univ Connecticut, Dept Phys, Storrs, CT 06269, USAUniv Michoacana de San Nicolas de Hidalgo, Inst Fis Matemat, Morelia 58040, Michoacan, MexicoBoston Univ, Ctr Math Phys, Dept Math, Boston, MA 02215, USACalif Inst Phys & Astrophys, Palo Alto, CA 94306, USADunne, GV, Univ Connecticut, Dept Phys, Storrs, CT 06269, USA TI - Two-loop self-dual Euler-Heisenberg lagrangians 2. Imaginary part and Borel analysis AB - We analyze the structure of the imaginary part of the two-loop Euler-Heisenberg QED effective lagrangian for a constant self-dual background. The novel feature of the two-loop result, compared to one-loop, is that the prefactor of each exponential (in-stanton) term in the imaginary part has itself an asymptotic expansion. We also perform a high-precision test of Borel summation techniques applied to the weak-field expansion, and find that the Borel dispersion relations reproduce the full prefactor of the leading imaginary contribution MH - Mexico|Michoacan MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 10 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000177447500042 L2 - renormalization regularization and renormalons;nonperturbative effects;electromagnetic processes and properties;FREE-ELECTRON LASER; PAIR-PRODUCTION SO - Journal of High Energy Physics 2002 ;(6): 5318 UI - 11400 AU - Dunne GV AU - Schubert C AD - Univ Connecticut, Dept Phys, Storrs, CT 06269, USAUniv Michoacana, Inst Phys & Math, Morelia 58040, Michoacan, MexicoDunne, GV, Univ Connecticut, Dept Phys, Storrs, CT 06269, USA TI - Two-loop Euler-Heisenberg Lagrangians and borel analysis AB - We present a simple closed formula for the two-loop scalar QED Euler-Heisenberg Lagrangian in a Euclidean self-dual field. The use of Borel techniques for the construction of Euler-Heisenberg Lagrangians is shortly discussed MH - Mexico|Michoacan MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000174916100034 L2 - FIELD SO - International Journal of Modern Physics A 2002 ;17(6-7):956-959 5319 UI - 11827 AU - Dunne GV AU - Schubert C AD - Univ Connecticut, Dept Phys, Storrs, CT 06269, USAUniv Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoCalif Inst Phys & Astrophys, Palo Alto, CA 94306, USADunne, GV, Univ Connecticut, Dept Phys, Storrs, CT 06269, USA TI - Closed-form two-loop Euler-Heisenberg Lagrangian in a self-dual background AB - We show that the two-loop Euler-Heisenberg effective Lagrangian for scalar QED in a constant Euclidean self-dual background has a simple explicit closed form expression in terms of the digamma function. This result leads to a simple analysis of the weak- and strong-field expansions, the two-loop scalar QED beta function, and the analytic continuation properties of the effective Lagrangian and its imaginary part. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000173649300007 L2 - QED;world-line;effective action;Euler-Heisenberg;self-dual;FIELD; VACUUM; AMPLITUDES SO - Physics Letters B 2002 ;526(1-2):55-60 5320 UI - 10233 AU - Duran-Gomez JL AU - Enjeti PN AD - Inst Tecnol Chihuahua, Chih 31310, MexicoTexas A&M Univ, Dept Elect Engn, College Stn, TX 77843, USADuran-Gomez, JL, Inst Tecnol Chihuahua, Chih 31310, Mexico TI - A new approach to mitigate nuisance tripping of PWM ASDs due to utility capacitor switching transients (CSTs) AB - Utility capacitor-switching transients (CSTs) are responsible,for numerous nuisance tripping of PWM adjustable speed drives (ASDs) and result in costly down times. During a CST event, the dc link voltage of the ASD can momentarily rise to greater than 1.3 p.u. resulting in nuisance tripping. In this paper, a new approach to mitigate nuisance tripping of PWM ASDs is discussed. In this approach, the soft-charge resistor available in most ASDs, is momentarily introduced in the series path of the power flow to effectively damping the CST. Further, damping effect is electronically adjusted. The proposed approach demonstrates a method that can be incorporated within an ASD to electronically damp the oscillatory transient generated during a CST event. The advantages of the proposed approach are i) electronic damping for CST event is achieved by low cost modifications to ASD hardware; ii) it adapts to several utility resonance conditions. The required additional hardware for ASDs to be immune to CSTs, can be viewed as an add-on option. This paper discusses the analysis, simulation and experimental performance on a 480 V, 16 kVA commercial ASD equipment MH - Mexico|Chihuahua MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8993 UR - ISI:000178228600023 L2 - adjustable speed drives;capacitor switching transients;electronic damping;power quality;ADJUSTABLE-SPEED DRIVES; VOLTAGE; MAGNIFICATION SO - Ieee Transactions on Power Electronics 2002 ;17(5):799-806 5321 UI - 9812 AU - Duran-Valencia C AU - Galicia-Luna LA AU - Richon D AD - Ecole Natl Super Mines, Lab Thermodynam, Ctr Energet, F-77305 Fontainebleau, FranceInst Politecn Nacl, ESIQIE, Lab Termodinam Grad, Mexico City 07738, DF, MexicoRichon, D, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Phase equilibrium data for the binary system N,N-dimethylformamide plus ethylene and plus ethane at several temperatures up to 18 MPa AB - The ethylene (C2H4)-NN-dimethylformamide (DMF) binary system at 293.25, 303.05 and 323.05 K and pressures up to 18 MPa presents only a vapor-liquid equilibrium (VLE) behavior. The ethane (C2H6)-NN-dimethylformamide binary system behaves quite differently. In fact this latter displays not only a vapor-liquid equilibrium (VLE) behavior but also liquid-liquid equilibrium (LLE) and vapor-liquid-liquid equilibrium (VLLE) behaviors. The ethane-NN-dimethylformamide binary system has been studied at 264.45, 278.55, 293.15 and 313.35 K up to 18MPa. Both systems are correlated using the Peng-Robinson equation-of-state with Wong-Sandler mixing rules. A stability test based on the tangent plan criterion, as described by Michelsen, is carried out during the flash calculations made on the ethane-NN-dimethylformamide binary system. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000179354100019 L2 - vapor-liquid equilibria;liquid-liquid equilibria;equation-of-state;N,N-dimethylformamide;ethane;ethylene;ISOTHERMAL FLASH PROBLEM; VAPOR-LIQUID-EQUILIBRIA; APPARATUS; STATE SO - Fluid Phase Equilibria 2002 ;203(1-2):295-307 5322 UI - 10153 AU - Durazo R AU - Baumgartner TR AD - USN, Postgrad Sch, Oc Dz, Monterey, CA 93943, USACtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Marine Life Res Grp, La Jolla, CA 92093, USADurazo, R, UABC, Fac Ciencias Marinas, Apdo Postal 453, Ensenada, Baja California, Mexico TI - Evolution of oceanographic conditions off Baja California: 1997-1999 AB - This paper examines the oceanic response off Baja California, Mexico, to the 1997-1998 El Nino and the transition to La Nina conditions. The data presented were gathered during seven cruises over a grid based on the CaICOFI station plan, from lines 100-130, out to station 80. T-S diagrams with data obtained during the peak phase of El Nino, demonstrate that warmer and saltier (spicier) than normal conditions prevailed in the upper 600 m over this region. Temperature and salinity anomalies calculated for CalCOFI line 120 revealed waters near the coast at 50 m depth to be up to 8.7 degreesC warmer and S = 0.8 saltier than the climatology during October 1997. These large anomalies persisted through January 1998, with some slight diminution in the magnitudes near the surface. This study suggests that anomalously warm and salty waters were fed from a source of spicy water to the southwest, identified as Subtropical Surface Water (StSW), and that low-salinity Tropical surface waters (TSW) were blocked to the southeast in the vicinity of the tip of the Peninsula. Subsurface waters associated with the California undercurrent (CU), fed from the Eastern Tropical Pacific (ETP), were also warmer and saltier than normal, and indicate a significant expansion in volume of the CU, presumably a result of intensification of poleward flow at depth. We postulate that the well defined near-surface and deep poleward flows in the study area reflect anomalous large-scale cyclonic circulation affecting the flow in the southeastern region of the North Pacific subtropical gyre east of 125degreesW. Following the El Nino event, warm and salty upper waters retreated to latitudes south of Punta Eugenia. With the return to normal and cooler conditions, equatorward flow over the sampling grid predominated with an increased meandering and mesoscale activity. Transition to La Nina conditions would have been associated with re-establishment of normal anticyclonic flow in the southeastern quadrant of the Pacific subtropical gyre. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 29 U4 - Oceanography U5 - J;Article AV - English IS - 0079-6611 UR - ISI:000178308900002 L2 - NORTH PACIFIC-OCEAN; GULF-OF-CALIFORNIA; EL-NINO SIGNAL; CURRENT SYSTEM; WEST-COAST; UNITED-STATES; VARIABILITY; WATER; TEMPERATURE; TRANSITION SO - Progress in Oceanography 2002 ;54(1-4):7-31 5323 UI - 10416 AU - Dureault A AU - Destarac M AU - Leising F AU - Guerrero R AU - Gnanou Y AU - Taton D AD - Univ Bordeaux 1, Lab Chim Polymeres Organ, F-33607 Pessac, FranceRhodia, Ctr Rech Aubervilliers, Aubervilliers, FranceCtr Invest Quim Aplicada, Saltillo, Coahuila, Mexico TI - Raft-mediated polymerization using dithioesters generated from tetrathiophosphates MH - France MH - Mexico|Coahuila PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000177422302574 SO - Abstracts of Papers of the American Chemical Society 2002 ;224():U475-U475 5324 UI - 10672 AU - Durou S AU - Dejean A AU - Olmsted I AU - Snelling RR AD - Univ Toulouse 3, UMR 5552, Lab Ecol Terrestre, F-31062 Toulouse 3, FranceCICY, Merida 97310 2, Yucatan, MexicoLos Angeles Cty Museum Nat Hist, Los Angeles, CA 90007, USADurou, S, Univ Toulouse 3, UMR 5552, Lab Ecol Terrestre, 118 Route Narbonne,Bat 4 R3, F-31062 Toulouse 3, France TI - Ant diversity in coastal zones of Quintana Roo, Mexico, with special reference to army ants AB - This work was conducted along the Mexican Caribbean coastline on a strip of land with dunes and mangroves separated from upland communities by fossil lagoons. In Puerto Morelos, Quintana Roo, Mexico, we evaluated the ant diversity and the role of vegetation zonation in the distribution of ant species. We recorded a total of 96 species and 33 genera of ants from a 140 ha area. The Myrmicinae had the most species; Pheidole and Camponotus were the most common genera. The species composition was influenced by the ecological zones and the presence of aggressive ant species. The army ant Eciton burchelli was spatially constrained and bivouacs were recorded only in the mangrove zone, which contained the greatest ant diversity. In a completely flooded mangrove area of the Sian Ka'an Biosphere Reserve, we sampled only dry hollowed branches of the red mangrove and the pseudobulbs of an epiphytic orchid in order to determine the role the arboreal stratum plays on ant distribution. By focusing on this ant community, we show that Cephalotes spp. and Pseudomyrmex spp. dominated the dry hollowed branches, while the most frequent inhabitant of the Myrmecophila cristinae pseudobulbs was Dolichoderus bispinosus, an ant species that also nests in bromeliads MH - France MH - Mexico|Yucatan MH - USA PB - CHICO: CALIF STATE UNIV RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0361-6525 UR - ISI:000176798600014 L2 - ant diversity;coastal zone;Ecitoninae;mangrove;Mexico;plant distribution;WASMANNIA-AUROPUNCTATA; MANGROVE FORESTS; RAIN-FOREST; TRAMP-ANT; FORMICIDAE; HYMENOPTERA; COMMUNITIES; PATTERNS; BORNEO; ISLAND SO - Sociobiology 2002 ;40(2):385-402 5325 UI - 11104 AU - Durrant B AU - Czekala N AU - Olson M AU - Anderson A AU - Amodeo D AU - Campos-Morales R AU - Gual-Sill F AU - Ramos-Garza J AD - Zool Soc San Diego, Reprod Physiol Div, Ctr Reprod Endanagered Species, San Diego, CA 92112, USAChapultepec Pk Zoo, Mexico City, DF, MexicoDurrant, B, Zool Soc San Diego, Reprod Physiol Div, Ctr Reprod Endanagered Species, POB 120551, San Diego, CA 92112 USA TI - Papanicolaou staining of exfoliated vaginal epithelial cells facilitates the prediction of ovulation in the giant panda AB - The giant panda is seasonally monoestrus, experiencing a single estrous with spontaneous ovulation in the spring. Therefore, accurate monitoring of the estrous cycle to pinpoint the time of ovulation is critical for the success of timed mating or artificial insemination. Analysis of exfoliated vaginal epithelial cells is a simple technique that rapidly yields information about the estrous status of a panda. Vaginal swabs were obtained during five estrous cycles of two nulliparous females. Cells were stained with the trichrome Papanicolaou and classified as basophils, intermediates or superficials. The color of stained cells, basophilic. acidophilic or keratinized, was recorded as a characteristic independent of the three standard cell types. The day urinary conjugates of estrogen fell from peak levels was considered the day of ovulation. A chromic shift occurred 8-9 days before ovulation when the majority of exfoliated vaginal cells changed from basophilic (blue) to acidophilic (pink) without accompanying nuclear or cytoplasmic changes. A second chromic shift was consistently observed 2 days prior to ovulation when keratinized (orange) cells replaced acidophils as the majority of vaginal cells. Monochrome staining of vaginal cells is sufficient to quantify superficial cells, which is a useful adjunct to behavioral and endocrinological data in determining estrous in the giant panda. However, the timing and duration of superficial cell elevations are substantially different between and within individual females. which limits the accuracy of timing ovulation for artificial insemination. The predictive value of vaginal cytology was greatly enhanced with the trichrome stain and evaluation of cell color. (C) 2002 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0093-691X UR - ISI:000175675100009 L2 - giant panda;vaginal cytology;estrous;ovulation;carnivore;AILUROPODA-MELANOLEUCA; CAPTIVITY; PREGNANCY SO - Theriogenology 2002 ;57(7):1855-1864 5326 UI - 9807 AU - Dutta PR AU - Cappello R AU - Navarro-Garcia F AU - Nataro JP AD - Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAIPN, CICATA, Program Mol Biomed, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Cell Biol, Mexico City 07738, DF, MexicoNataro, JP, Univ Maryland, Sch Med, Ctr Vaccine Dev, HSF 480,685 W Baltimore St, Baltimore, MD 21201 USA TI - Functional comparison of serine protease autotransporters of Enterobacteriaceae AB - The plasmid-encoded toxin (Pet) of enteroaggregative Escherichia coli (EAEC) belongs to a family of high-molecular-weight serine protease autotransporters of Enterobacteriaceae (SPATEs) which also includes Pic from EAEC and Shigella flexneri, EspC from enteropathogenic E. coli, EspP from enterohemorrhagic E. coli, Sat from uropathogenic E. coli, Tsh from avian pathogenic E. coli, and SepA from S. flexneri. Phylogenetic analysis shows the SPATE proteins to represent a distinct subfamily of autotransporters with amino acid identities ranging from 35 to 55%, providing a powerful resource to direct structure-function studies. In this study, we show that these related proteins are proteases with divergent substrate specificities, suggesting different functions. The cleavage profile of oligopeptides was found to be unique for each SPATE protein. The SPATEs showed proteolytic activity for several substrates, namely mucin, pepsin, human coagulation factor V, and erythroid spectrin. The cleavage of spectrin has been hypothesized as the mechanism through which Pet induces cytopathic effects. However, whereas Pet, Sat, and EspC cleaved spectrin, only Pet and Sat elicited cytopathic effects; the remaining SPATEs did not cause any morphological changes to HEp-2 cell monolayers. EspC and Pet exhibited acid-dissociable binding to HEp-2 cells. However, Pet was more efficient at entering HEp-2 cells, suggesting a basis for the different abilities of these two proteases to damage cells. Our data suggest that, despite the homologies observed among these proteins, the SPATEs have different pathogenetic functions only partly dependent on their substrate specificities MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 35 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000179377600074 L2 - ENTEROAGGREGATIVE ESCHERICHIA-COLI; SHIGELLA-FLEXNERI; ENTEROTOXIN; TOXIN; PROTEINS; PET; SECRETION; STRAIN; SEPA; ESPC SO - Infection and Immunity 2002 ;70(12):7105-7113 5327 UI - 11738 AU - Dykeman R AU - guilar-Madrid G AU - Smith T AU - Juarez-Perez CA AU - Piacitelli GM AU - Hu H AU - Hernandez-Avila M AD - Harvard Univ, Sch Med, Channing Lab, Brigham & Womens Hosp,Dept Med, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USANatl Inst Publ Hlth, Populat Res Ctr, Cuernavaca, Morelos, MexicoOff Work & Hlth, Mexican Inst Social Secur, Mexico City, DF, MexicoNIOSH, Div Surveillance Hazard Evaluat & Field Studi, Cincinnati, OH 45226, USAEmory Univ, Rollins Sch Publ Hlth, Div Occupat & Environm Hlth, Atlanta, GA 30322, USAHu, H, Harvard Univ, Sch Med, Channing Lab, Brigham & Womens Hosp,Dept Med, 118 Longwood Ave, Boston, MA 02115 USA TI - Lead exposure in Mexican radiator repair workers AB - Background Lead exposure was investigated among 73 Mexican radiator repair workers (RRWs), 12 members of their family (4 children and 8 wives), and 36 working controls. RRWs were employed at 4 radiator repair shops in Mexico City and 27 shops in Cuernavaca and surrounding areas. Methods Exposure was assessed directly through the use of personal air sampling and hand wipe samples. In addition, industrial hygiene inspections were performed and detailed questionnaires were administered. Blood lead levels were measured by graphite furnace atomic absorption spectroscopy (AAS). Results The mean (SD) values for blood lead of the RRWs, 35.5 (13.5) mug/dl, was significantly greater than the same values for the working controls, 13.6 (8.7) mug/dl; P < 001. After excluding a single outlier (247 μg/m(3)), air lead levels ranged from 0 to 99 μg/m(3) 3 with a mean (SD) value of 19 (23) μg/m(3) (median = 7.9 μg/m(3)). In a final multivariate regression model of elevated blood lead levels, the strongest predictors were smoking (vs. non-smoking), the number of radiators repaired per day on average, and the use (vs. non-use) of a uniform while at work, which were associated with blood lead elevations of 11.4 μg/dl, 1.95 μg/dl/radiator/day, and 16.4 μg/dl, respectively (all P < .05). Uniform use was probably a risk factor because they were not laundered regularly and consequently served as reservoir of contamination on which RRWS frequently wiped their hands. Conclusions Lead exposure is a significant problem of radiator repair work, a small industry that is abundant in Mexico and other developing countries. Am. J. Ind. Med. 41:179-187, 2002. (C) 2002 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 5 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0271-3586 UR - ISI:000174132200003 L2 - lead;radiator repair;industrial hygiene;occupational disease;BLOOD LEAD; CHILDREN; CITY; SURVEILLANCE SO - American Journal of Industrial Medicine 2002 ;41(3):179-187 5328 UI - 11520 AU - Dykova I AU - Avila EJF AU - Fiala I AD - Inst Parasitol ASCR, Ceske Budejovice 37005, Czech RepublicUniv S Bohemia, Fac Biol Sci, Ceske Budejovice 37005, Czech RepublicCIAD, AC Unidad Invest Acuicultura & Manejo Ambiental, Mazatlan, Sinaloa, MexicoDykova, I, Inst Parasitol ASCR, Branisovska 31, Ceske Budejovice 37005, Czech Republic TI - Kudoa dianae sp n. (Myxosporea : Multivalvulida), a new parasite of bullseye puffer, Sphoeroides annulatus (Tetraodontiformes : Tetraodontidae) AB - A new multivalvulid myxosporean species, Kudoa dianae sp. n., is described from bullseye puffer, Sphoeroides annulatus (Jenyns) (Tetraodontiformes: Tetraodontidae). Plasmodia develop in extramuscular sites, in the wall of oesophagus and less frequently on mesenteries, Mature spores can reach lumen of the digestive tract directly by disruption of plasmodial wall or via macrophage transport to the oesophageal epithelium. New species is characterised by morphology of spores and by the complete sequence of SSU rRNA gene that differs from all hitherto known sequences of Kudoa species. Spore morphology (moderate-sized, simple non-ornate spores, quadrate in apical view) clusters with that of Kudoa scienae, K. cerebralis, K. chilkaensis, K. leiostomi, K. funduli, K. cascasia and K. ovivora. Analysis of phylogenetic relationships (using SSU rRNA gene sequences) among five Kudoa species, the molecular data of which are available thus far, revealed that K. dianae is distinguishable from these five species and that its closest relation is with K. miniauriculata MH - Czech Republic MH - Mexico|Sinaloa PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 10 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000174728600004 L2 - myxosporea;multivalvulida;taxonomy;SSU rDNA;MERLUCCIUS-PRODUCTUS; AUSTRALIAN FISHES; SP MYXOZOA; MUSCULATURE; MEGLITSCH; TELEOSTEI; PACIFIC; PISCES SO - Folia Parasitologica 2002 ;49(1):17-23 5329 UI - 10601 AU - Dyson JE AU - Arthur SJ AU - Hartquist TW AD - UNAM, Inst Astron, Morelia 58090, Michoacan, MexicoUniv Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, EnglandArthur, SJ, UNAM, Inst Astron, Campus Morelia,Apartado Postal 3-72, Morelia 58090, Michoacan, Mexico TI - The evolution of mass loaded supernova remnants - I. Constant and Mach Number dependent mass injection rates AB - We describe the evolution of spherically symmetric supernova remnants in which mass addition takes place from embedded clouds. We derive simple approximations to the remnant evolution which can be used for investigating the generation of supernova induced phenomena such as galactic superwinds MH - United Kingdom MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000177182200028 L2 - ISM : kinematics and dynamics;ISM : supernova remnants;galaxies : ISM;ASTRONOMICAL FLOWS; INTERSTELLAR-MEDIUM; NOVA REMNANTS; SUPERWINDS; CLOUD SO - Astronomy & Astrophysics 2002 ;390(3):1063-1074 5330 UI - 11117 AU - Dzuba IG AU - Diaz EY AU - Allen B AU - Leonard YF AU - Ponce ECL AU - Shah KV AU - Bishai D AU - Lorincz A AU - Ferris D AU - Turnbull B AU - Avila MH AU - Salmeron J AD - Johns Hopkins Univ, Sch Publ Hlth, Baltimore, MD, USAMexican Inst Social Secur, Epidemiol & Hlth Serv Res Unit, Cuernavaca, Morelos, MexicoNatl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca, Morelos, MexicoDigene Corp, Gaithersburg, MD, USAMed Coll Georgia, Augusta, GA 30912, USAMexican Inst Social Secur, Nutrit Epidemiol Res Unit, Mexico City, DF, MexicoSalmeron, J, Hosp Reg 1, Unidad Invest Epidemiol, Plan Ayala S-N,Piso 11, Cuernavaca, Morelos, Mexico TI - The acceptability of self-collected samples for HPV testing vs. the pap test as alternatives in cervical cancer screening AB - Objective: To explore the acceptability of the self-collection of samples for human papillomavirus (HPV) testing in comparison with that of the Pap test. Methods: The study population consisted of 1069 women 20 years and older who were eligible for coverage through the Mexican Institute of Social Security (IMSS). These women were randomly selected among participants in a larger study to evaluate the use of HPV testing as an alternative in cervical cancer screening. All participants provided a self-collected vaginal sample for HPV testing according to explicit instructions and underwent a Pap test. Afterwards, each woman was interviewed about her experience and opinion regarding the two procedures. Acceptability was measured by a calculated score based on discomfort, pain, embarrassment, privacy, perception of personal treatment during the Pap test, and understanding of how to perform the self-sampling method. Results: Ninety-three percent of women experienced sufficient privacy with the Pap test, whereas 98% of women reported that privacy with the self-sampling procedure was acceptable. The Pap test consistently provoked more discomfort, pain, and embarrassment than self-sampling. Sixty-eight percent of the women who indicated a test preference chose self-sampling. Preference for this method was positively associated with monthly household income. Women reported a preference for self-sampling because it is more comfortable (71.2%) and causes less embarrassment (55.8%). Conclusions: Self-sampling is more acceptable than the Pap test and could improve coverage rates of early detection programs. The incorporation of self-collected samples to detect HPV could encourage participation in screening programs among those women who reject the Pap test because of the necessary pelvic examination MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 27 U4 - Public, Environmental & Occupational Health;Medicine, General & Internal;Obstetrics & Gynecology;Women's Studies U5 - J;Article AV - English IS - 1524-6094 UR - ISI:000175303000010 L2 - HUMAN PAPILLOMAVIRUS INFECTION; EPIDEMIOLOGIC EVIDENCE; MEXICO; PROGRAM; DNA; NEOPLASIA SO - Journal of Womens Health & Gender-Based Medicine 2002 ;11(3):265-274 5331 UI - 11428 AU - Echave P AU - Esparza-Ceron MA AU - Cabiscol E AU - Tamarit J AU - Ros J AU - Membrillo-Hernandez J AU - Lin ECC AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol & Biotecnol, Mexico City 04510, DF, MexicoUniv Lleida, Fac Med, Dept Ciencies Med Basiques, Lleida, SpainHarvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115, USAMembrillo-Hernandez, J, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol & Biotecnol, POB 70-228, Mexico City 04510, DF, Mexico TI - DnaK dependence of mutant ethanol oxidoreductases evolved for aerobic function and protective role of the chaperone against protein oxidative damage in Escherichia coli AB - The adhE gene of Escherichia coli encodes a multifunctional ethanol oxidoreductase (AdhE) that catalyzes successive reductions of acetyl-CoA to acetaldehyde and then to ethanol reversibly at the expense of NADH. Mutant JE52, serially selected for acquired and improved ability to grow aerobically on ethanol, synthesized an AdhE(A267T/E568K) with two amino acid substitutions that sequentially conferred improved catalytic properties and stability. Here we show that the aerobic growth ability on ethanol depends also on protection of the mutant AdhE against metal-catalyzed oxidation by the chaperone DnaK (a member of the Hsp70 family). No DnaK protection of the enzyme is evident during anaerobic growth on glucose. Synthesis of DnaK also protected E. coli from H2O2 killing under conditions when functional AdhE is not required. Our results therefore suggest that, in addition to the known role of protecting cells against heat stress, DnaK also protects numerous kinds of proteins from oxidative damage MH - Mexico|Distrito Federal MH - Spain MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 18 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000174856000088 L2 - enzyme evolution;Hsp70 chaperone;FERMENTATIVE ALCOHOL-DEHYDROGENASE; HEAT-SHOCK PROTEIN; ADHE GENE; CELLULAR DEFECTS; STRESS; TRANSCRIPTION; EXPRESSION; IDENTIFICATION; INACTIVATION; METABOLISM SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(7):4626-4631 5332 UI - 10236 AU - Echavez G AU - McCann E AD - Natl Autonomous Univ Mexico, Grad Engn Fac, Mexico City 04510, DF, MexicoBinnie Black & Veatch, Redhill RH1 LQ, Surrey, EnglandEchavez, G, Natl Autonomous Univ Mexico, Grad Engn Fac, Ciudad Univ,Ap Po 70-256, Mexico City 04510, DF, Mexico TI - An experimental study on the free surface vertical vortex AB - An experimental investigation of the three-dimensional configuration of a vertical vortex flow, showing the importance of separating the radial and axial components of the total outflow, is presented. The relative magnitudes of the axial and radial flow components are measured and the depth of the air core is shown to be highly sensitive to the axial flow component. A representation of the flow in the core zone is also presented which may indicate internal boundary conditions that may be of interest to those developing theoretical models MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0723-4864 UR - ISI:000178226800007 SO - Experiments in Fluids 2002 ;33(3):414-421 5333 UI - 9686 AU - Echevarria-Machado I AU - Munoz-Sanchez A AU - Loyola-Vargas VM AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97310, Yuc, MexicoInst Nacl Ciencias Agr, Havana, CubaHernandez-Sotomayor, SMT, Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Calle 43 130,Chuburna Hidalgo,Apdo,Postal 87,Cord, Merida 97310, Yuc, Mexico TI - Spermine stimulation of phospholipase C from Catharanthus roseus transformed roots AB - Polyamines (Pas) are aliphatic amines that are ubiquitous in all living organisms and regulate a broad spectrum of physiological processes. It has been suggested that they can act through a signal transduction pathway. Using Catharanthus roseus hairy roots as a model we determined the levels of Pas throughout a culture cycle. We found that there is a peak in the intracellular concentration of Pas during the first six days of culture. The effect of Pas on phospholipase C (PLC) activity was also investigated. Putrescine, spermidine and spermine were added in vitro to the PLC assay. Putrescine did not modify PLC activity; spermidine inhibited the enzyme but at very high, non-physiological concentrations; and spermine increased the PLC activity four-fold at physiological concentrations. Our results suggest that spermine could regulate root growth by regulating the PLC signal transduction mechanism MH - Cuba MH - Mexico|Yucatan PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000179581200003 L2 - Catharanthus roseus;phospholipase C;polyamines;SOMATIC EMBRYOGENESIS; POLYAMINE METABOLISM; OSMOTIC-STRESS; ARABIDOPSIS-THALIANA; SIGNAL TRANSDUCTION; PLANT-GROWTH; CELLS; CARROT; DECARBOXYLASE; PURIFICATION SO - Journal of Plant Physiology 2002 ;159(11):1179-1188 5334 UI - 11797 AU - Edmunds WM AU - Carrillo-Rivera JJ AU - Cardona A AD - British Geol Survey, Wallingford OX10 8BB, Oxon, EnglandUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoEdmunds, WM, British Geol Survey, Maclean Bldg, Wallingford OX10 8BB, Oxon, England TI - Geochemical evolution of groundwater beneath Mexico City AB - The geochemical evolution of groundwaters along a 24 km flow beneath Central Mexico City path from the Sierra de las Cruces towards Lake Texcoco has been investigated using stable isotopes, radiocarbon and major and trace elements to deter-mine the natural baseline conditions, the extent of any contamination and the effectiveness of the overlying aquitard seal. Modern groundwaters of low salinity (<200 mg l(-1)) are found up to 11 km. from the outcrop area and groundwater ages of up to 6000 yr BP occur in the middle part of the section. Groundwater stable isotope ratios 6 180 and 52 H lie close to the Global meteoric water line, indicating that the groundwater originates from local rainfall. The groundwater chemistry may be interpreted as the result of inputs from the source area with progressive water-rock interaction down the horizontal flow gradient. A redox boundary is found at 9 km along the line of section, coincident with the start of the confined section. Relatively low nitrate concentrations (below 9 m l(-1) NO3-N) are found in the aerobic waters; low concentrations of NO3 in the aerobic waters and low Cl reflect inputs prior to the modern development. Some elements (Cr, U, As, Se, Sb) increase their concentration with distance (time) as far as the redox boundary, but low concentrations occur in the reducing aquifer section. The chemistry of several major ions (Mg, Na/Cl, K) as well as trace elements such as Li, Rb, Ba reflect the weathering of the basaltic mineral assemblage (feldspars and mafic minerals) and their increases are generally proportional to residence time; phosphate, F and I concentrations indicate a probable source from apatite in the basaltic or rhyolitic rocks. A borehole in the east of the city (some 17 km downgradient) intercepted thermal water (Si geothermometry indicates 163degreesC at depth). This water gives a distinctive composition indicating possible addition of metamorphic CO, which has then reacted with the igneous rocks. Increases in B and Cl are derived from volatiles trapped in the glass or vesicular basalt. A thermal anomaly found in the middle section of the heavily pumped aquifer is interpreted as the up-coming of warmer water from medium to greater depth mainly from basalts, rhyolites and possibly limestones. The geochemistry indicates that groundwater beneath Mexico City is of good quality and there is no obvious evidence of leakage of inorganic compounds from surface sources of contamination through the aquitard. The younger groundwater drawn from the western outcrop area is generally of good inorganic quality. Increased drawdowns in the confined aquifer have induced flow of warmer water with higher Cl from depth. The resources in the aquifer represent an important reserve of good quality water which need to be properly managed as a high quality resource as part of integrated plans for the City's future supplies. (C) 2002 W.M. Edmunds. Published by Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000173810800001 L2 - groundwater;hydrogeochemistry;Mexico City;isotopes;trace elements;pollution;VALLEY; WATER; FLOW; ISOTOPE; AQUIFER; BASIN SO - Journal of Hydrology 2002 ;258(1-4):1-24 5335 UI - 10012 AU - ego-Orozco A AU - Chen Y AU - Henry B AU - Becq-Giraudon JF AD - CNRS, F-94107 St Maur, FranceIPGP, F-94107 St Maur, FranceInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Orleans, Dept Sci Terre, ISTO, F-45067 Orleans 2, FranceBur Rech Geol & Minieres, DR MGG, F-45060 Orleans 2, FranceHenry, B, CNRS, 4 Ave Neptune, F-94107 St Maur, France TI - Paleomagnetic results from the Permian Rodez basin implications: the Late Variscan tectonics in the southern French Massif Central AB - A paleomagnetic study has been carried out on three sedimentary formations of the Permian Rodez basin in the southern France. Two of them yield paleomagnetic poles of Saxonian and Thuringian age showing counterclockwise rotation of moderate amplitude, during or after the Thuringian deposition. For the French Massif Central, contrary to its stable southern (Lodeve basin) and eastern (Largentiere basin) borders, on its southwestern border, in a large area including the Rodez, Saint-Affrique and perhaps Brive basins suffered rotations due to the extensional tectonics during the Late Variscan period. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0985-3111 UR - ISI:000178657800003 L2 - paleomagnetism;rotations;Variscan;tectonics;FRANCE; EXTENSION; ROTATIONS; REMAGNETIZATION; BORDER; EUROPE; PLATE; MODEL; PATH SO - Geodinamica Acta 2002 ;15(4):249-260 5336 UI - 9836 AU - Ehrenfreund P AU - Irvine W AU - Becker L AU - Blank J AU - Brucato JR AU - Colangeli L AU - Derenne S AU - Despois D AU - Dutrey A AU - Fraaije H AU - Lazcano A AU - Owen T AU - Robert F AD - Leiden Observ, NL-2300 RA Leiden, NetherlandsLeiden Univ, Leiden Inst Chem, Soft Matter Astrobiol Lab, NL-2300 RA Leiden, NetherlandsUniv Massachusetts, Dept Astron, Lederle Grad Res Ctr 619, Amherst, MA 01003, USAUniv Calif Santa Barbara, Inst Crystal Studies, Dept Geol Sci, Santa Barbara, CA 93106, USALawrence Livermore Natl Lab, H Div, Shock Phys Grp, Livermore, CA 94551, USAOsserv Astron Capodimonte, INAF, I-80131 Naples, ItalyEcole Natl Super Chim Paris, CNRS, UMR 7573, Lab Chim Bioorgan & Organ Phys, F-75231 Paris 05, FranceObserv Aquitain Sci Univers OASO, F-33270 Florac, FranceObserv Grenoble, LAOG, Astrophys Lab, F-38041 Grenoble 9, FranceUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Hawaii, Inst Astron, Honolulu, HI 96822, USAMuseum Natl Hist Nat, Lab Mineral, F-75005 Paris, FranceEhrenfreund, P, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands TI - Astrophysical and astrochemical insights into the origin of life AB - Stellar nucleosynthesis of heavy elements such as carbon allowed the formation of organic molecules in space, which appear to be widespread in our Galaxy. The physical and chemical conditions-including density, temperature, ultraviolet (UV) radiation and energetic particles-determine reaction pathways and the complexity of organic molecules in different space environments. Dense interstellar clouds are the birth sites of stars of all masses and their planetary systems. During the protostellar collapse, interstellar organic molecules in gaseous and solid phases-are integrated into protostellar disks from which planets and smaller solar system bodies form. After the formation of the planets 4.6 billion years ago, our solar system, including the Earth, was subjected to frequent impacts for several hundred million years. Life on Earth may have emerged during or shortly after this heavy bombardment phase, perhaps as early as 3.90-3.85 billion years ago, but the exact timing remains uncertain. A prebiotic reducing atmosphere, if present, predicts that building blocks of biopolymers-such as amino acids, sugars, purines and pyrimidines-would be formed in abundance. Recent modelling of the Earth's early atmosphere suggests, in contrast, more neutral conditions (e.g. H2O, N-2, CO2), thus, precluding the formation of significant concentrations of prebiotic organic compounds. Moreover, even if the Earth's atmosphere were reducing, the presence of UV photons would readily destroy organic compounds unless they were quickly sequestered away in rocks or in the prebiotic ocean. Other possible sources of organic compounds would be high temperature vent chemistry, although the stability of such compounds (bases, amino acids) in these environments remains problematic. Finally, organic compounds may have been delivered to the Earth by asteroids, comets and smaller fragments, such as meteorites and interplanetary dust particles. It is likely that a combination of these sources contributed to the building blocks of life on the early Earth. It may even have taken several starts before life surpassed the less than ideal conditions at the surface. What is certain is that once life emerged, it learned to adapt quickly taking advantage of every available refuge and energy source (e.g. photosynthesis and chemosynthesis), an attribute that eventually led to complex metabolic life and even. our own existence. Current experimental research investigating the origin of life is focused on the spontaneous formation of stable polymers out of monomers. However, understanding the spontaneous formation of structure is not enough to understand the formation of life. The introduction and evolution of information and complexity is essential to our definition of life. The formation of complexity and the means to distribute and store information are currently being investigated in a number of theoretical frameworks, such as evolving algorithms, chaos theory and modem evolution theory. In this paper we review the physical and chemical processes that form and process organic matter in space. In particular we discuss the chemical pathways of organic matter in the interstellar medium, its evolution in protoplanetary disks and its integration into solar system material. Furthermore, we investigate the role of impacts and the delivery of organic matter to the prebiotic Earth. Processes that may have assembled prebiotic molecules to produce the first genetic material and ideas about the formation of complexity in chemical networks are also discussed MH - France MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 51 U4 - Physics, Multidisciplinary U5 - J;Review AV - English IS - 0034-4885 UR - ISI:000179211900002 L2 - INTERPLANETARY DUST PARTICLES; AMORPHOUS-CARBON GRAINS; DENSE MOLECULAR CLOUDS; EARLY SOLAR-SYSTEM; COMET HALE-BOPP; ULTRAVIOLET INTERSTELLAR EXTINCTION; MIDINFRARED SPECTRAL EVOLUTION; EXTRATERRESTRIAL AMINO-ACIDS; MARTIAN METEORITE ALH84001; INSOLUBLE ORGANIC-MATTER SO - Reports on Progress in Physics 2002 ;65(10):1427-1487 5337 UI - 11870 AU - Einasto M AU - Einasto J AU - Tago E AU - Andernach H AU - Dalton GB AU - Muller V AD - Tartu Astrophys Observ, EE-61602 Toravere, EstoniaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv Oxford, Dept Astrophys, Oxford OX1 3RH, EnglandAstrophys Inst Potsdam, D-14482 Potsdam, GermanyEinasto, M, Tartu Astrophys Observ, EE-61602 Toravere, Estonia TI - Optical and X-ray clusters as tracers of the supercluster-void network. III. Distribution of Abell and APM clusters AB - We present a comparison of how well the large-scale structure of the universe is traced by clusters from the Abell catalog and from the Automated Plate Measuring Facility (APM). We investigate selection functions for both cluster catalogs, using samples of all clusters (including clusters with estimated redshifts) and samples of clusters with measured redshifts. We present a catalog of superclusters of galaxies, based on APM clusters up to a redshift z(lim) = 0.13. We find that the distribution of rich superclusters, defined by all Abell and APM clusters, is similar in the volume covered by both cluster samples. We calculate the correlation function for Abell and APM cluster samples. We show that the supercluster-void network can be traced with both cluster samples; the network has a period of similar to120 h(-1) Mpc. However, the APM cluster sample with measured redshifts covers a small volume, which contains only a few very rich superclusters. These superclusters surround one void and have exceptionally large mutual separations. Because of this property, the secondary maximum of the correlation function of APM clusters with measured velocities is located at larger scales than the corresponding feature in the correlation function of Abell clusters. We conclude that the APM sample is not representative of the large-scale structure as a whole because of the small volume covered. The Abell cluster catalog is presently the best sample to investigate the large-scale distribution of high-density regions in the universe MH - United Kingdom MH - Estonia MH - Germany MH - Mexico|Guanajuato PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000173767400005 L2 - cosmology : observations;galaxies : clusters : general;large-scale structure of universe;COLD DARK MATTER; RICH CLUSTERS; POWER-SPECTRUM; GALAXY CLUSTERS; SPATIAL CORRELATIONS; REDSHIFT SURVEY; UNIVERSE; EVOLUTION; CATALOGS SO - Astronomical Journal 2002 ;123(1):51-65 5338 UI - 9557 AU - Elias-Zuniga A AU - Beatty MF AD - Univ Nebraska, Dept Engn Mech, Lincoln, NE 68588, USAInst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan, Monterrey 64849, Nuevo Leon, MexicoBeatty, MF, POB 910215, Lexington, KY 40591, USA TI - Constitutive equations for amended non-Gaussian network models of rubber elasticity AB - New constitutive equations based on an amended form of the Kuhn-Gran probability distribution function due to Jernigan and Flory are derived from the standard James-Guth (JG) 3-chain and Arruda-Boyce (AB) 8-chain non-Gaussian molecular network models. The kinematics describing the stretch of a 1-chain model in an affine deformation shows that the relative stretch of a single molecular chain initially oriented along the diagonal of a cube is determined by the first principal invariant of the Cauchy-Green deformation tensor. The Kuhn-Gran probability distribution for a randomly oriented chain and its more general amended form due to Wang and Guth, are functions of only the relative chain stretch. Hence, any non-Gaussian network model for which the configurational entropy of all chains may be uniform is characterized by an elastic response function that depends on only the first principal invariant of the Cauchy-Green deformation tensor. Both the regular and amended AB 8-chain models are characterized by specific response functions in this class; the regular and amended JG 3-chain models, however, are not. An amended form of the phenomenological composite 3-chain/8-chain model suggested by Wu and van der Giessen is introduced. Analytical relations for several kinds of homogeneous deformations of the standard and amended models are compared with a variety of experimental data by others. It is found that results for the amended 3-chain and 8-chain models do not vary significantly from results for the corresponding regular models. The composite model, on the other hand, shows excellent overall agreement with the diverse data, including equibiaxial deformations for which other models show greater variance; but it offers no improvement in comparison with data for plane strain compression. Some remarks relating the chain parameters of the 3-chain and 8-chain network models, and the limiting chain and continuum stretches for these models are discussed in an appendix. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Multidisciplinary U5 - J;Article AV - English IS - 0020-7225 UR - ISI:000179990000005 L2 - BEHAVIOR SO - International Journal of Engineering Science 2002 ;40(20):2265-2294 5339 UI - 12006 AU - Elizalde-Gonzalez MP AU - Mattusch J AU - Wennrich R AD - Univ Autonoma Puebla, Ctr Quim, Puebla 72570, MexicoEnvironm Res Ctr, Dept Analyt Chem, D-04318 Leipzig, GermanyElizalde-Gonzalez, MP, Univ Autonoma Puebla, Ctr Quim, Apdo Postal J-55, Puebla 72570, Mexico TI - Behaviour of organoarsenic compounds in contact with natural zeolites AB - Batch experiments were conducted on aqueous solutions containing arsenite, arsenobetaine, methylarsonic acid or phenylarsonic acid in contact with natural zeolites to examine their interaction. The concentration of the arsenic species in the liquid phase at equilibrium before and after contact was measured by means of liquid chromatography coupled with inductively coupled plasma mass spectrometry detection. Clinoptilolites completely removed arsenobetaine from the solution and the resulting amounts of dimethylarsinic acid were detected. The methylarsonic acid maximum concentration diminution was reached at a mass - to volume V value of m/V = 0.2. Phenylarsonic acid solution decreased its concentration 75% after treatment with clinoptilolites. Untreated mordenites in contact with arsenite solutions led to the formation of arsenate, whereas acid-washed mordenites practically removed arsenobetaine and were less effective for methylarsonic acid. To show the incompatibility of molecular dimensions with the zeolite windows, the molecular parameters of surface area, molecular volume, molecular length, and the width and depth of arsenite, arsenate and a series of ten organic arsenic compounds were calculated. Since sorption onto the external zeolite surface rather than a sieve process defined the interaction, an acid-catalysed reaction mechanism is proposed to explain the transformation results. Copyright (C) 2001 John Wiley Sons, Ltd MH - Germany MH - Mexico|Puebla PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0268-2605 UR - ISI:000173225000003 L2 - arsenite;arsenate;organoarsenicals;methylarsonic acid;dimethylarsinic acid;arsenobetaine;phenylarsonic acid;natural zeolites;speciation;HPLC-ICP-MS;ARSENIC COMPOUNDS; ICP-MS; ARSENOBETAINE SO - Applied Organometallic Chemistry 2002 ;16(1):9-16 5340 UI - 10320 AU - Elizarraras-Rivas J AU - Fragoso-Herrera R AU - Cerdan-Sanchez LF AU - Ramos-Zepeda R AU - Totsuka-Sutto SE AU - Gallegos-Arreola P AU - Saha S AU - McGrath J AD - IMSS, Ctr Invest Biomed Occidente CMNO, Div Genet Humana, Guadalajara, Jalisco, MexicoIMSS, Ctr Comunitario Salud Mental 1, Zapopan, Jalisco, MexicoCIBO, Div Inmunol, Mexico City, DF, MexicoUniv Guadalajara, CUCS, Dept Genet Humana, Guadalajara 44430, Jalisco, MexicoCIBO, Div Mol Med, Mexico City, DF, MexicoWolston Pk Hosp, Queensland Ctr Schizophrenia Res, Brisbane, Qld, AustraliaElizarraras-Rivas, J, IMSS, Ctr Invest Biomed Occidente CMNO, Div Genet Humana, Guadalajara, Jalisco, Mexico TI - Dermatoglyphics and schizophrenia: a Mexican study MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - CARLTON: BLACKWELL PUBLISHING ASIA RP - NOT IN FILE U3 - TC 0 U4 - Psychiatry U5 - J;Letter AV - English IS - 0004-8674 UR - ISI:000177966400026 L2 - B RIDGE COUNT; MARKER SO - Australian and New Zealand Journal of Psychiatry 2002 ;36(5):704-705 5341 UI - 12247 AU - Elizondo EJ AU - Srinivas V AD - Univ Nacl Autonoma Mexico, Math Inst, Mexico City 04510, DF, MexicoTata Inst Fundamental Res, Sch Math, Mumbai 400005, IndiaElizondo, EJ, Univ Nacl Autonoma Mexico, Math Inst, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Some remarks on Chow varieties and Euler-Chow series AB - In this article we give a geometric explanation of the fact that the Betti numbers of the d-fold symmetric product of the proyective space of dimension n are the same as those of the Grassmanian of d-planes in the complex vector space of dimension n + d. In fact, we give a correspondence which is the graph of a rational morph ism which induces an isomorphism, and whose matrix is the identity. We also prove some properties of Euler-Chow series and state some open problems related to this series. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000172584300003 SO - Journal of Pure and Applied Algebra 2002 ;166(1-2):67-81 5342 UI - 10103 AU - Elizondo MSG AU - Enriquez ILL AU - Wagner WL AD - Inst Politecn Nacl, CIIDIR, Durango 34000, Dgo, MexicoSmithsonian Inst, US Natl Herbarium, Dept Systemat Biol Bot, Washington, DC 20013, USAElizondo, MSG, Inst Politecn Nacl, CIIDIR, Apdo Postal 738, Durango 34000, Dgo, Mexico TI - Megacorax gracielanus (Onagraceae), a new genus and species from Durango, Mexico AB - Megacorax gracielanus, a distinctive new genus and species from the Sierra de Coneto in central Durango, Mexico, is described and illustrated. Its distinctive characters include: leaves linear, petals presented to one side of the flower, and capsule wall thin and distended by the seeds. It appears to be most closely related to Lopezia Cavanilles based on possession of 4-merous flowers, deciduous sepals, a capitate stigma, stipules, and a tendency toward the structural zygomorphy in the flowers found in Lopezia. In addition, the capsules of Megacorax gracielanus are very similar in, shape and structure to the capsules of certain species of Lopezia. Because Megacorax has distinctive morphological characters and does not have the unique synapomorphies of Lopezia (2 fertile stamens or 1 fertile stamen and 1 staminode, and petals unequal), it is here described as a related genus MH - Mexico|Durango MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000178421700009 L2 - Megacorax;Mexico;Onagraceae SO - Novon 2002 ;12(3):360-365 5343 UI - 9758 AU - Ellertson C AU - Heimburger A AU - cevedo-Garcia D AU - Schiavon R AU - Mejia G AU - Corona G AU - del Castillo E AU - Langer A AD - Populat Council, Reg Off Latin Amer & Caribbean, Mexico City 04000, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Hlth & Social Behav, Boston, MA 02115, USAFdn Mexicana Planeac Familiar, Tlalpan 04530, MexicoTestamos Funcionando Testa, Mexico City 11000, DF, MexicoGrp Informac Reprod Elegida, Mexico City 04100, DF, MexicoEllertson, C, Populat Council, Reg Off Latin Amer & Caribbean, Escondida 110, Mexico City 04000, DF, Mexico TI - Information campaign and advocacy efforts to promote access to emergency contraception in Mexico AB - Emergency contraception (EC) has the potential to reduce unwanted pregnancy significantly, in Mexico as elsewhere. Recent years have seen tremendous growth in programs and research devoted to expanding access to emergency methods worldwide. In Mexico we developed a comprehensive model introduction effort that included four components: provider training, public information (through a dedicated hotline and website, free media, paid radio and TV spots, participation in talk shows, and alternative media channels), collaboration with the public sector to include EC in the official family planning norms, and assistance to partner with commercial firms to register a dedicated EC product. Ongoing efforts to combat misperceptions and overcome opposition are crucial to informing the public and ensuring greater access to the method. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000179452600006 L2 - emergency contraception;Mexico;information campaign;YUZPE REGIMEN SO - Contraception 2002 ;66(5):331-337 5344 UI - 9395 AU - Emkey R AU - Reid I AU - Mulloy A AU - Correa-Rotter R AU - Favus M AU - Bone H AU - Gupta J AU - LaMotta A AU - Santora A AD - Merck Res Labs, Rahway, NJ, USAMichigan Bone & Mineral Clin, Detroit, MI, USAUniv Chicago, Chicago, IL 60637, USAInst Nacl Nutr Salvador Zubiran, Tlalpan, MexicoMed Coll Georgia, Augusta, GA 30912, USAAuckland Hosp, Auckland, New ZealandRadiant Res, Wyomissing, PA, USA TI - Ten-year efficacy and safety of alendronate in the treatment of osteoporosis in postmenopausal women MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 10 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000177952800060 SO - Journal of Bone and Mineral Research 2002 ;17():S139-S139 5345 UI - 8377 AU - Emkey RD AU - Reid I AU - Mulloy AL AU - Correa-Rotter R AU - Favus M AU - Bone H AU - Gupta J AU - LaMotta A AU - Santora AC AD - Radiant Res, Wyomissing, PA, USAAuckland Hosp, Auckland, New ZealandMed Coll Georgia, Augusta, GA 30912, USAInst Nacl Nutr Salvador Zubiran, Tlalpan, MexicoUniv Chicago, Chicago, IL 60637, USAMichigan Bone & Mienral Clin, Detroit, MI, USAMerck Res Labs, Rahway, NJ, USA TI - Ten-year efficacy and safety of alendronate in the treatment of osteoporosis in postmenopausal women MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100082 SO - Osteoporosis International 2002 ;13():S32-S32 5346 UI - 9716 AU - Enam S AU - del Valle L AU - Lara C AU - Gan DD AU - Ortiz-Hidalgo C AU - Palazzo JP AU - Khalili K AD - Temple Univ, Coll Sci & Technol, Ctr Neurovirol & Canc Biol, Philadelphia, PA 19122, USAAmer British Cowdray Med Ctr IAP, Dept Patol, Mexico City 01120, DF, MexicoThomas Jefferson Univ Hosp, Dept Pathol, Philadelphia, PA 19107, USAKhalili, K, Temple Univ, Coll Sci & Technol, Ctr Neurovirol & Canc Biol, 1900 N 12th St,015-96,Room 203, Philadelphia, PA 19122 USA TI - Association of human polyomavirus JCV with colon cancer: Evidence for interaction of viral T-antigen and beta-catenin AB - Infection of the gastrointestinal tract by the human polyomavirus, JCV, which has been frequently detected in raw urban sewage, can occur via intake of contaminated water and food. In light of earlier reports on the tumorigenecity of JCV, we investigated the presence of the JCV genome and the expression of viral proteins in a collection of 27 well-characterized epithelial malignant tumors of the large intestine. Results from gene amplification revealed the presence of the viral early genome in 22 of 27 samples. Expression of the viral oncogenic early protein, T-antigen, and the late auxiliary protein, Agnoprotein, was observed in >50% of the samples. The absence of the viral capsid protein in the tumor cells excludes productive replication of the virus in neoplastic cells. Laser capture microdissection confirmed the presence of the JCV genome and expression of T-antigen in precancerous villous adenomas and regions of invasive adenocarcinoma. The ability of JCV T-antigen to interact with beta-catenin and the nuclear detection of beta-catenin in T-antigen-positive cells suggests dysregulation of the Wnt pathway in the tumor cells. The coproduction of T-antigen and beta-catenin in colon cancer cells enhanced transcription of the c-myc promoter, the downstream target of beta-catenin. These observations provide evidence for a possible association of JCV with colon cancer and suggest a novel regulatory role for T-antigen in the deregulation of the Wnt signaling pathway through beta-catenin in tumors of the gastrointestinal tract MH - Mexico|Distrito Federal MH - USA PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 52 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000179641000046 L2 - PROGRESSIVE MULTIFOCAL LEUKOENCEPHALOPATHY; VIRUS-DNA SEQUENCES; GASTROINTESTINAL-TRACT; HUMAN-POPULATIONS; CELLS; TRANSMISSION; PROTEIN; EXPRESSION; REGION SO - Cancer Research 2002 ;62(23):7093-7101 5347 UI - 10515 AU - England R AU - Lamour R AU - Lopez-Estrada J AD - Open Univ, Milton Keynes MK7 6AA, Bucks, EnglandHumboldt Univ, Berlin, GermanyNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoEngland, R, Open Univ, Milton Keynes MK7 6AA, Bucks, England TI - Multiple shooting using a dichotomically stable integrator for solving differential-algebraic equations AB - yIn previous work by the first author, it has been established that a dichotornically stable discretization is needed when solving a stiff boundary-value problem in ordinary differential equations (ODEs), when sharp boundary layers may occur at each end of the interval. A dichotomically stable implicit Runge-Kutta method, using the 3-stage, fourth-order, Lobatto IIIA formulae, has been implemented in a variable step-size initial-value integrator, which could be used in a multiple-shooting approach. In the case of index-one differential-algebraic equations (DAEs) the use of the Lobatto IIIA formulae has an advantage, over a comparable Gaussian method, that the order is the same for both differential and algebraic variables, and there is no need to treat them separately. The ODE integrator (SYMIRK [R. England, R.M.M. Mattheij, in: Lecture Notes in Math., Vol. 1230, Springer, 1986, pp. 221-234]) has been adapted for the solution of index-one DAEs, and the resulting integrator (SYMDAE) has been inserted into the multiple-shooting code (MSHDAE) previously developed by R. Larnour for differential-algebraic boundary-value problems. The standard version of MSHDAE uses a BDF integrator, which is not dichotornically stable, and for some stiff test problems this fails to integrate across the interval of interest, while the dichotornically stable integrator SYMDAE encounters no difficulty. Indeed, for such problems, the modified version of MSHDAE produces an accurate solution, and within limits imposed by computer word length, the efficiency of the solution process improves with increasing stiffness. For some nonstiff problems, the solution is also entirely satisfactory. (C) 2001 IMACS. Published by Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000177312100009 L2 - differential-algebraic equations;boundary-value problems;dichotomic stability;multiple shooting;BOUNDARY-VALUE-PROBLEMS; DAES SO - Applied Numerical Mathematics 2002 ;42(1-3):117-131 5348 UI - 9622 AU - Erickson HS AU - Zarain-Herzberg M AU - Lightner DV AD - Univ Arizona, Dept Vet Sci & Microbiol, Aquaculture Pathol Lab, Tucson, AZ 85721, USACtr Ciencias Sinaloa, Sinaloa, MexicoErickson, HS, Univ Arizona, Dept Vet Sci & Microbiol, Aquaculture Pathol Lab, Tucson, AZ 85721 USA TI - Detection of Taura syndrome virus (TSV) strain differences using selected diagnostic methods: diagnostic implications in penaeid shrimp AB - Anecdotal industry reports of Taura syndrome (TS) epizootics in a Taura syndrome virus (TSV) tolerant strain of Penaeus stylirostris and collected evidence of field TS epizootics in P. stylirostris suggested that a distinct new TSV strain might have emerged since 1994, The Ecuadorian 1992 TSV genome published in GenBank is virtually identical to the Hawaiian 1994 TSV isolate (HI94TSV) used as reference throughout this investigation. Three other geographic and year isolates of TSV from naturally occurring TS epizootics of cultured penaeid shrimp were obtained from Mexico (SIN98TSV and MX99TSV from P. vannamei and SON2KTSV from P. stylirostris). Selected TSV diagnostic methods set forth by the Office International des Epizooties were utilized as the basis for isolate analysis. By Southern blot, TSV probes P15 and Q1 reacted specifically with all the diagnostic reverse transcription polymerase chain reaction (RT-PCR) fragments. Additionally, labeled RT-PCR amplicons from the TSV isolates amplified by routine diagnostic RT-PCR primers gave positive in situ hybridizations with TSV, indicating that all 4 isolates shared homology. By Western blot, immuno-dot blot, and immunohistochemistry, all TSV-purified isolates reacted with TSV polyclonal antibody (PAb). However, with TSV monoclonal antibody (MAb) 1A1 all isolates, except SIN98TSV, reacted, indicating that the difference in isolate SIN98TSV is within VP1, the target for MAb 1A1 The amino acid (AA) sequence of SIN98TSV VP1, MX99TSV VP1 and SON2KTSV VP1 has a 98% homology with the reference H194TSV VP1. A span of 12 AAs are identified in SIN98TSV VP1 containing significant AA substitutions which may account for a conformational change of the antigenic epitope sufficient to prevent MAb 1A1 from binding. The implications of these results with respect to the antibody-based diagnosis of TSV are discussed MH - USA MH - Mexico|Sinaloa PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 11 U4 - Fisheries;Veterinary Sciences U5 - J;Article AV - English IS - 0177-5103 UR - ISI:000179693000001 L2 - TSV;Taura syndrome virus;diagnostic methods;immunodetection;IN-SITU HYBRIDIZATION; SPOT SYNDROME VIRUS; POLYACRYLAMIDE GELS; VANNAMEI CRUSTACEA; GENE PROBES; PROTEINS; AMERICA; HISTOPATHOLOGY; ANTIBODIES; SEQUENCE SO - Diseases of Aquatic Organisms 2002 ;52(1):1-10 5349 UI - 10470 AU - Erler J AU - Langacker P AU - Li TJ AD - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Wisconsin, Dept Phys, Madison, WI 53706, USAErler, J, Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104, USA TI - Z-Z(') mass hierarchy in a supersymmetric model with a secluded U(1)(')-breaking sector AB - We consider the Z'/Z mass hierarchy in a supersymmetric model in which the U(1)' is broken in a secluded sector coupled to the ordinary sector only by gauge and possibly soft terms. A large mass hierarchy can be achieved while maintaining the normal sparticle spectra if there is a direction in which the tree level potential becomes flat when a particular Yukawa coupling vanishes. We describe the conditions needed for the desired breaking pattern, to avoid unwanted global symmetries, and for an acceptable effective mu parameter. The electroweak breaking is dominated by A terms rather than scalar masses, leading to tan betasimilar or equal to1. The spectrum of the symmetry breaking sector is displayed. There is significant mixing between the MSSM particles and new standard model singlets, for both the Higgs scalars and the neutralinos. A larger Yukawa coupling for the effective mu parameter is allowed than in the NMSSM because of the U(1)' contribution to the running from a high scale. The upper bound on the tree-level mass of the lightest CP even Higgs doublet mass is about cx174 GeV, where c is of order unity, but the actual mass eigenvalues are generally smaller because of singlet mixing MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 39 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177338600054 L2 - STRING MODELS; SYMMETRY-BREAKING; PARITY VIOLATION; GAUGE STRUCTURES; ATOMIC CESIUM; EXTRA U(1); MU-PROBLEM; PHYSICS; HIGGS; BOSONS SO - Physical Review D 2002 ;66(1): 5350 UI - 12216 AU - Escalante BA AU - Mcgiff JC AU - Oyekan AO AD - New York Med Coll, Dept Pharmacol, Valhalla, NY 10595, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07300, DF, MexicoTexas So Univ, Coll Pharm & Hlth Sci, Houston, TX 77004, USAMcGiff, JC, New York Med Coll, Dept Pharmacol, Valhalla, NY 10595, USA TI - Role of cytochrome P-450 arachidonate metabolites in endothelin signaling in rat proximal tubule AB - We examined the rat proximal tubule (PT) response to endothelin-1 (ET-1) in terms of 20-hydroxyeicosatetraenoic acid (HETE) dependency. Arachidonic acid (AA) (1 muM) decreased ouabain-sensitive Rb-86 uptake from 2.1 +/-0.1 to 0.3 +/-0.08 ng Rb.10 mug protein(-1).2min(-1) (P<0.05); 20-HETE (1 M) had similar effects. Dibromododecenoic acid (DBDD) (2 muM), an inhibitor of omega -hydroxylase, abolished the inhibitory action of AA on Rb-86 uptake whereas the PT response to 20-HETE was unaffected. ET-1 at 0.1, 1, 10, and 100 nM reduced Rb-86 uptake from 2.8 +/-0.3 in control PTs to 2.4 +/-0.2, 1.7 +/-0.1, 0.67 +/-0.08, and 0.1 +/-0.03 ng Rb.10 mug protein(-1).2 min(-1), respectively. DBDD (2 mM) abolished the inhibitory effect of ET-1 on Rb-86 uptake as did BMS182874 (1 muM), an ETA-selective receptor antagonist. ET-1 (100 nM) significantly increased PT 20-HETE release by similar to 50%, an effect prevented by DBDD. N-omega-nitro-L-arginine-methyl ester (L-NAME), given for 4 days to inhibit nitric oxide synthase (NOS), increased arterial pressure from 92 +/- 12 to 140 +/-8 mmHg and increased endogenous release of 20-HETE from isolated PTs (measured by gas chromatography/mass spectrometry). In L-NAME-treated PTs, but not in control PTs, 0.1 mM AA inhibited ouabain-sensitive Rb-86 uptake by >40%; the response to AA was attenuated by DBDD. We conclude that, in the PTs, 1) 20-HETE is a second messenger for ET-1 and 2) conversion of AA to 20-HETE is augmented when NOS is inhibited MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000172654900017 L2 - 20-hydroxyeicosatetraenoic acid;arachidonic acid metabolites;endothelin-1;nitric oxide;THICK ASCENDING LIMB; NA+-K+-ATPASE; NITRIC-OXIDE; EPOXYEICOSATRIENOIC ACIDS; EPITHELIAL-CELLS; STRAIGHT TUBULE; RABBIT; KIDNEY; TRANSPORT; 20-HETE SO - American Journal of Physiology-Renal Physiology 2002 ;282(1):F144-F150 5351 UI - 10679 AU - Escalona J AU - Jose JV AU - Tiesinga P AD - UAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoNortheastern Univ, Dept Phys, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115, USASalk Inst Biol Studies, Sloan Swartz Ctr Theoret Neurobiol, La Jolla, CA 92037, USASalk Inst Biol Studies, Computat Neurobiol Lab, La Jolla, CA 92037, USAEscalona, J, UAEM, Fac Ciencias, Cuernavaca 62210, Morelos, Mexico TI - Entrainment, Arnold tongues, and duality in a periodically driven integrate-and-fire model AB - We have studied an integrate-and-fire model neuron driven by a periodic sequence of Gaussian-shaped current pulses of width 1/2N and amplitude epsilon. For large N the current is a sequence of delta pulses and for smaller N it approaches a sine. When N is large, the firing rate f vs. epsilon curve is a staircase of entrainment steps yielding an Arnold tongue structure in the tau vs. epsilon plane. In the small N limit we find novel entrainment steps in the f vs. tau plane, without Arnold tongue structure. The steps in the two N regimes are related by a duality transformation. In the presence of noise in the pulse arrival times, the steps disappear above a critical noise value. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0925-2312 UR - ISI:000176839200015 L2 - integrate-and-fire model;entrainment;Arnold tongues;duality transformation;OSCILLATORS; SYNCHRONIZATION; NEURONS SO - Neurocomputing 2002 ;44():91-96 5352 UI - 9318 AU - Escamilla M AU - Ontiveros A AU - Nicolini H AU - Raventos H AU - Mendoza R AU - Delgado A AU - Esparza E AU - Montero P AU - Camacho A AU - Munoz R AU - Dassori A AU - Armas R AU - Medina R AU - Contreras S AU - Cano E AD - Univ Texas, Hlth Sci Ctr, Dept Psychiat, San Antonio, TX 78284, USAInst Informac & Invest Salud Mental, Monterrey, MexicoInst Mexicano Psiquiatria, Mexico City, DF, MexicoUniv Costa Rica, San Jose, Costa RicaUCLA Harbor, Dept Psychiat, Los Angeles, CA, USALogan Hts Family Clin, San Diego, CA, USAUniv Calif San Francisco, Dept Psychiat, San Francisco, CA 94143, USA TI - Clinical characteristics of subjects from a multi-site genetic study of schizophrenia (SC) in Latin American families MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000178414400408 SO - American Journal of Medical Genetics 2002 ;114(7):846-847 5353 UI - 9685 AU - Escamilla R AU - Gallardo-Amores JM AU - Moran E AU - ario-Franco MA AD - Univ Complutense, Fac Ciencias Quim, Dept Quim Inorgan, Lab Complutense Altas Presiones, Madrid 28040, SpainNatl Autonomous Univ Mexico, Inst Invest & Mat, Mexico City 04510, DF, MexicoAlario-Franco, MA, Univ Complutense, Fac Ciencias Quim, Dept Quim Inorgan, Lab Complutense Altas Presiones, Madrid 28040, Spain TI - Crystal chemistry and magnetic properties of SeCu1-xZnxO3 (0-<= x <= 1) perovskites AB - The effects of zinc substitution in the structural and magnetic properties of the orthorhombic solid solution SeCu1-xZnxO3 have been studied. Rietveld refinements of the X-ray diffraction patterns indicate that the zinc ions occupy the copper sites. This replacement induces some changes in the Cu-O bond lengths and [Cu-O-Cu] bond angles. Magnetization vs temperature measurements show a fast decrease in the Weiss constant that reveals a direct quadratic relationship with the increase of the average [Cu-O-Cu] bond angle. Besides, the introduction of a non-magnetic cation in the B-positions in the structure of SeCu1-xZnO3 system, progressively decreases the ferromagnetic interactions. (C) 2002 Elsevier Science (USA) MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000179544200020 L2 - perovskites;selenites;high pressure;copper oxides;ferromagnetism;Rietveld refinement;OXIDES SO - Journal of Solid State Chemistry 2002 ;168(1):149-155 5354 UI - 10852 AU - Escamilla R AU - Gallardo-Amores JM AU - Moran E AU - ario-Franco MA AD - Univ Complutense, Fac Ciencias Quim, Lab Complutense Altas Presiones, E-28040 Madrid, SpainUniv Complutense, Fac Ciencias Quim, Dept Quim Inorgan 1, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAlario-Franco, MA, Univ Complutense, Fac Ciencias Quim, Lab Complutense Altas Presiones, E-28040 Madrid, Spain TI - High-pressure synthesis of SeCu1-xZnxO3 perovskites AB - The SeCu1-xZnxO3 solid solution, with a distorted perovskite-type structure, has been synthesized under high pressures and temperatures. X-ray diffraction analysis indicates that the zinc ions occupy the copper sites, a solid solution being formed. It seems that high-pressure stabilises a small cation such as Se4+ in the A site of the perovskite structure ABO(3) although the material is better described as formed by selenite anions SeO(3) over bar and Cu2+/Zn2+ cations MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0895-7959 UR - ISI:000176460800011 L2 - distorted perovskites;high pressure;selenites;copper oxides SO - High Pressure Research 2002 ;22(3-4):551-554 5355 UI - 11356 AU - Escobar M AU - Odoni AR AU - Roth E AD - Bentley Coll, Dept Math Sci, Waltham, MA 02452, USAMIT, Ctr Operat Res, Cambridge, MA 02139, USAMcKinsey & Co Inc, Mexico City 11560, DF, MexicoRoth, E, Bentley Coll, Dept Math Sci, 175 Forest St, Waltham, MA 02452 USA TI - Approximate solution for multi-server queueing systems with Erlangian service times AB - Multi-server queueing systems with Poisson arrivals and Erlangian service times are among the most applicable of what are considered "easy" systems in queueing theory. By selecting the proper order, Erlangian service times can be used to approximate reasonably well many general types of service times which have a unimodal distribution and a coefficient of variation less than or equal to 1. In view of their practical importance, it may be surprising that the existing literature on these systems is quite sparse. The probable reason is that, while it is indeed possible to represent these systems through a Markov process, serious difficulties arise because of (1) the very large number of system states that may be present with increasing Erlang order and/or number of servers, and (2) the complex state transition probabilities that one has to consider. Using a standard numerical approach, solutions of the balance equations describing systems with even a modest Erlang order and number of servers require extensive computational effort and become impractical for larger systems. In this paper we illustrate these difficulties and present the equally likely combinations (ELC) heuristic which provides excellent approximations to typical equilibrium behavior measures of interest for a wide range of stationary multiserver systems with Poisson arrivals and Erlangian service. As system size grows, ELC computational times can be more than 1000 times faster than those for the exact approach. We also illustrate this heuristic's ability to estimate accurately system response under transient and/or dynamic conditions. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Engineering, Industrial;Operations Research & Management Science U5 - J;Article AV - English IS - 0305-0548 UR - ISI:000175165400006 L2 - MEAN WAITING TIME; G-C QUEUE; DIFFUSION-APPROXIMATION; M/G/M QUEUE; LENGTH SO - Computers & Operations Research 2002 ;29(10):1353-1374 5356 UI - 11402 AU - Escolar JD AU - Escolar MA AU - Guzman J AU - Roques M AD - Univ Zaragoza, Fac Med, Dept Morphol Sci, E-50009 Zaragoza, SpainHosp La Fe, Dept Pediat, E-46009 Valencia, SpainAutonomous Univ Ciudad Juarez, Anat Inst Biomed Sci, Mexico City, DF, MexicoEscolar, JD, Univ Zaragoza, Fac Med, Dept Morphol Sci, Domingo Miral S-N, E-50009 Zaragoza, Spain TI - Pressure volume curve and alveolar recruitment/de-recruitment. A morphometric model of the respiratory cycle AB - Hypothesis: The changes in pulmonary volume taking place during respiration are accompanied by the opening and closing of the alveoli, with the number of alveoli open, at the same transpulmonary pressure (TPP) differing, depending on whether the lung is insufflated or deflated. Material and methods: Seventy 344 Fischer rats divided into five groups. Group I lungs were fixed by instilling 10% formalin through the trachea to a pressure of 25 cm H2O. The lungs of the next four groups were air-filled and fixed via the pulmonary artery: group 2 lungs were fixed in inflation at 10 cm H2O TPP; group 3 lungs were fixed in inflation at 210 cm. H2O TPP; the lungs of groups 2 4 and 5 were fixed in deflation and, therefore, were inflated with air up to 27 cm. H2O to drop to 20 cm in group 4 and to 10 cm in group 5. The lungs were processed for light microscopy, carrying out a morphometric study. The results were statistically processed. Results: The lungs insufflated with liquid fixative at 25 cm of TPP reached higher values in the variables Pulmonary Volume, Internal Alveolar Surface (IAS) and Number of Alveoli, being statistically significant (p<0.05) in comparison with the other four groups. In the lungs fixed in deflation, the pulmonary volume, IAS and number of alveoli were greater than in those fixed in inflation. The lungs fixed to 20 cm in deflation displayed significant statistical differences compared with those fixed to 20 cm in inflation. The IAS and number of alveoli gave good rates in relation with the pulmonary volume (r greater than or equal to 0.65). Three variables were used to measure the size of the alveoli, alveolar cord, alveolar surface and Lm, but none showed significant modifications. Conclusion: This study supports the hypothesis that changes in lung volume are related to the increase/decrease in the number of alveoli that are open/closed and not to the modification in the size of the alveoli. Alveolar recruitment is the microscopic expression of pulmonary hysteresis, since the number of alveoli open in deflation is greater than the number open during inflation MH - Mexico|Distrito Federal MH - Spain PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 11 U4 - Cell Biology;Pathology U5 - J;Article AV - English IS - 0213-3911 UR - ISI:000174935900005 L2 - morphometry;alveolar recruitment;hysteresis;TLC;transpulmonary pressure;END-EXPIRATORY PRESSURE; RAT LUNG; IN-SITU; VENTILATION; HYSTERESIS; SIZE; AGE SO - Histology and Histopathology 2002 ;17(2):383-392 5357 UI - 10851 AU - Escoto-Rodriguez M AU - Bullock SH AD - Ctr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada 22800, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada 22860, Baja California, MexicoSan Diego State Univ, Dept Biol, San Diego, CA 92182, USABullock, SH, Ctr Invest Cient & Educ Super Ensenada, Dept Ecol, Apartado Postal 2732, Ensenada 22800, Baja California, Mexico TI - Long-term growth rates of cirio (Fouquieria columnaris), a giant succulent of the Sonoran Desert in Baja California AB - Factors affecting temporal and spatial variations of growth were studied in cirio, a succulent often surpassing 10 m in height. Measurements were obtained for intervals of 3-93 years at 14 sites in Baja California. Height tended to be asymptotic but total plant length (i.e. including all succulent stems) increased in linear relation to trunk diameter. Growth in length showed an overall average of 4-6cm year(-1) but ranged from 0.3-16.7cm year(-1) (annualized from data for intervals >34year). Most of the variation was among individuals, but some differences between sites were also significant. Growth was clearly and strongly related to size only for individuals less than 1 m in height. Repeated measures on the same individuals showed that the autocorrelation of growth was about 0.8 between intervals of 3 or more years. Differences among individuals were related to physiographic position, the presence of caliche and the density of neighboring plants, which together explained 43% of the variation. We discuss the implications of these results for age estimates, indicators of site quality and studies of similar plants. (C) 2002 Elsevier Science Ltd MH - Mexico|Baja California MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000176489300004 L2 - growth analysis;age estimation;autocorrelation;size dependence;site index;CARNEGIEA-GIGANTEA; PLANT-COMMUNITIES; SOUTHERN ARIZONA; PATTERNS; MEXICO; CACTUS; SOILS; ROCKS; SITE SO - Journal of Arid Environments 2002 ;50(4):593-611 5358 UI - 10865 AU - Eslava-Gomez A AU - Parry SJ AD - Univ London Imperial Coll Sci Technol & Med, Dept Environm Sci & Technol, Ascot SL5 7PY, Berks, EnglandUniv Nacl Autonoma Mexico, Inst Quim, Coyoacan 14510, MexicoParry, SJ, Univ London Imperial Coll Sci Technol & Med, Dept Environm Sci & Technol, Silwood Pk, Ascot SL5 7PY, Berks, England TI - Dual attenuation of X-rays for measurement of the concentration of metals in solution AB - This study examines the feasibility of dual energy attenuation metering to measure the concentration of two elements in aqueous solution, in a pipe of fixed thickness. Photon energies between 20 and 30 keV were selected in order to be able to determine mg L-1 metal concentrations. Pairs of elements from a group with atomic numbers between 24-82 (Cr, Cu, Zn, Hg and Pb) were used to test the methodology. The sensitivity of measurement for a mixture of two elements was predicted from the ratios of the attenuation coefficients at 20 keV to the ratios at 30 keV. Experimental results confirmed that the sensitivity was greatest for the mixture of Cr and Pb, since those elements have the largest ratio of attenuation coefficients (1.108) and it was possible to accurately analyse a solution containing 0.15 g L-1 of Cr and 0.13 g L-1 of Pb. Other pairs of elements with ratios at 1.074 and 1.078 (Cu/Pb, Cu/Hg,) could only be determined at g L-1 concentrations. It was not possible to differentiate between the pairs of elements with attenuation coefficient ratios below 1.03 (Cr/Zn and Cr/Cu) in this study MH - United Kingdom MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2654 UR - ISI:000176396800028 L2 - TRANSMISSION; WATER; OIL; GAS SO - Analyst 2002 ;127(6):847-851 5359 UI - 11494 AU - Espanol P AU - Vazquez F AD - Univ Nacl Educ Distancia, Dept Fis Fundamental, E-28040 Madrid, SpainUniv Autonoma Estado Morelos, Cuernavaca 62210, Morelos, MexicoEspanol, P, Univ Nacl Educ Distancia, Dept Fis Fundamental, Apartado 60141, E-28040 Madrid, Spain TI - Coarse graining from coarse-grained descriptions AB - We present a generalization of Zwanzig's method of projection operators to the case where the underlying dynamics is not deterministic. The method allows us to perform a coarse graining of an already coarse-grained level of description in which fluctuations are important. The initial level of description is described by a Fokker-Planck equation and, under suitable approximations, the final slower level of description is also described by a Fokker-Planck equation. We illustrate the method for the simple case of the diffusion of colloidal particles at two levels of descriptions MH - Mexico|Morelos MH - Spain PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 5 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1364-503X UR - ISI:000174649600010 L2 - coarse graining;colloidal suspensions;Fokker-Planck equation;DIFFUSING-WAVE SPECTROSCOPY; HYDRODYNAMIC INTERACTIONS; COLLOIDAL SUSPENSIONS; BROWNIAN PARTICLES; DYNAMICS; SYSTEMS; DECOMPOSITION; EQUATION SO - Philosophical Transactions of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 2002 ;360(1792):383-394 5360 UI - 9119 AU - Espinosa-Solares T AU - Brito-De la Fuente E AU - Tecante A AU - Medina-Torres L AU - Tanguy PA AD - Autonomous Univ Chapingo UACh, Dept Agroind Engn, Chapingo 56230, Edo De Mexico, MexicoNatl Autonomous Univ Mexico, Sch Chem E, Dept Food Sci & Biotechnol, Mexico City 04510, DF, MexicoURPEI, Ecole Polytech, Dept Chem Engn, Montreal, PQ, CanadaEspinosa-Solares, T, Autonomous Univ Chapingo UACh, Dept Agroind Engn, POB 161, Chapingo 56230, Edo De Mexico, Mexico TI - Mixing time in rheologically evolving model fluids by hybrid dual mixing systems AB - Mixing time experiments were performed using a hybrid dual mixing system, which included a helical ribbon impeller (HR) and either a Smith (ST) or Rushton turbine (RT). Xanthan gum solutions were used as rheologically evolving fluids to evaluate changes in mixing time under non-aerated and aerated conditions. The helical ribbon agitator and turbine of the hybrid dual mixing system was kept at a constant rotational speed ratio, N-T/N-HR = 10. Experiments showed that performance of the hybrid mixing system was superior to that of the individual impellers. Flow properties and gassing conditions played an important role in mixing time. While mixing time was practically identical under non-gassed conditions for both the ST-HR and RT-HR mixing systems in low-viscosity fluids, differences up to 1000% were observed in high shear-thinning fluids. In these fluids, the RT-HR combination exhibited better performance than the ST-HR. In high-viscosity fluids, gassing enhanced mixing time particularly when the ST-HR hybrid system was used. Both mixing systems showed similar mixing times under the highest gassed condition evaluated in this work MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0263-8762 UR - ISI:000181190900002 L2 - mixing time;hybrid geometry;stirred tanks;gassed conditions;shear-thinning fluids;POWER-CONSUMPTION; RESIDENCE TIME; GAS DISPERSION; STIRRED TANKS; FLOW; TURBINES; REACTORS; LIQUID; HOMOGENIZATION; FERMENTATIONS SO - Chemical Engineering Research & Design 2002 ;80(A8):817-823 5361 UI - 10650 AU - Espinosa-Solares T AU - Brito-De la Fuente E AU - Tecante A AU - Tanguy PA AD - Autonomous Univ Chapingo, Dept Agroind Engn, Chapingo 56230, Edo de Mexico, MexicoNatl Autonomous Univ Mexico, Dept Food Sci & Technol, Chem Fac E, Mexico City 04510, DF, MexicoEcole Polytech, Dept Chem Engn, URPE1, Montreal, PQ H3C 3A7, CanadaEspinosa-Solares, T, Autonomous Univ Chapingo, Dept Agroind Engn, POB 161, Chapingo 56230, Edo de Mexico, Mexico TI - Gas dispersion in rheologically-evolving model fluids by hybrid dual mixing systems AB - Gas dispersion experiments (0.18less than or equal toFrless than or equal to0.71,0.02less than or equal toFlless than or equal to0.09) were carried out using a hybrid dual mixing system, which included a helical ribbon impeller and either a Smith or a Rushton turbine. Newtonian and non-Newtonian model fluids were used as rheologically-evolving fluids to evaluate changes in gas dispersion performance. A motionless helical ribbon agitator was used as a baffle in low-viscosity Newtonian fluids. Both Smith and Rushton turbines produced a vortex, which was eliminated by the motionless helical ribbon impeller. Gas dispersion in low-viscosity fluids was enhanced when the helical ribbon agitator and turbine of the dual hybrid mixing system was kept at a rotational speed ratio of 10 (N-T/N-HR = 10), which allowed dispersion at a lower Fr than the turbine alone. For moderate-viscosity Newtonian fluids, gas dispersion was achieved at Frless than or equal to0.71 and Flless than or equal to0.05. Flow properties of non-Newtonian fluids played an important role in gas dispersion; transition from dispersing to flooding stages was observed for the fluids that were more shear-thinning (nless than or equal to0.38) MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0930-7516 UR - ISI:000177011400009 L2 - POWER-CONSUMPTION; IMPELLER TYPE; MASS-TRANSFER; FERMENTATIONS SO - Chemical Engineering & Technology 2002 ;25(7):723-727 5362 UI - 9945 AU - Espinosa G AU - Amero C AU - Gammage RB AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoOak Ridge Natl Lab, Oak Ridge, TN 37831, USAEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Measurements of alpha particle energy using nuclear tracks in solids methodology AB - In this paper we present a method for the measurement of alpha particle energy using polycarbonate materials as nuclear track detectors (NTDs). This method is based on the interaction of the radiation with the solid-state materials, using the relationship between the energy deposited in the material by the ionising particle and the track developed after an established chemical process. The determination of the geometrical parameters of the formed track. such as major axis, minor axis and overall track length, permit determination of the energy of the alpha particle. The track analysis is performed automatically using a digital image system, and the data are processed in a PC with commercial software. In this experiment Gd-148, U-238, Th-230, Pu-239 and Cm-244 alpha particle emitters were used. The values for alpha particle energy resolution. the linear response to energy, the confidence in the results and the automatisation of the procedure make this method a promising analysis system MH - Mexico|Distrito Federal MH - USA PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899900114 L2 - DETECTOR SO - Radiation Protection Dosimetry 2002 ;101(1-4):561-564 5363 UI - 10525 AU - Esqueda M AU - Herrera T AU - Perez-Silva E AU - Aparicio A AU - Moreno G AD - Ctr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Lab Micol, Mexico City 04510, DF, MexicoUniv Alcala de Henares, Dept Biol Vegetal, E-28871 Alcala De Henares, Madrid, SpainEsqueda, M, Ctr Invest Alimentac & Desarrollo AC, Apartado Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Distribution of Battarrea phalloides in Mexico AB - The distribution of Battarrea phalloides in Mexico is presented. Actually it is only known from the north and central part of the country, It has been usually collected in arid and semiarid areas and several times associated with Schinus molle in urban zones of different Mexican states. The largest basidiomata were observed on the floodplain of the Tastiota estuary associated with halophilic vegetation MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000177167900013 L2 - chorology;taxonomy;tulostomatales;Battarreaceae;STEVENII SO - Mycotaxon 2002 ;82():207-214 5364 UI - 11791 AU - Esquivel-Sirvent R AU - Green DH AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoOhio Univ, Dept Geol Sci, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAEsquivel-Sirvent, R, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Hydrodynamic acoustic absorption at the fluid/solid transition of suspensions AB - A theoretical calculation of the excess acoustic attenuation due to hydrodynamic interactions in colloidal suspensions, when the suspended particles are spheres or plates, is presented. Our model is based on the fluid flow shearing between suspended particles during the passage of a longitudinal acoustic wave. To incorporate the many-body effects of the system, the nearest-neighbor distribution function for finite-size particles is introduced. The results of the modeling are compared to available experimental results. The main features of the experimental curves (e.g., attenuation maxima as a function of concentration and an increase in attenuation with frequency) are reproduced and it is shown that the attenuation due to hydrodynamic effects is a significant contribution to wave damping in high-concentration suspensions. (C) 2002 Acoustical Society of America MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: ACOUSTICAL SOC AMER AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Acoustics U5 - J;Article AV - English IS - 0001-4966 UR - ISI:000173784900012 L2 - LONG-WAVELENGTH PROPAGATION; COMPOSITE ELASTIC MEDIA; ATTENUATION; PARTICLES; SOUND; INCLUSIONS; DEPENDENCE; BEHAVIOR; SEDIMENT; PACKINGS SO - Journal of the Acoustical Society of America 2002 ;111(2):763-768 5365 UI - 9634 AU - Esteban C AU - Peimbert M AU - Torres-Peimbert S AU - Rodriguez M AD - Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainUNAM, Inst Astron, Mexico City, DF, MexicoINAOE, Puebla, MexicoEsteban, C, Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain TI - Optical recombination lines of heavy elements in giant extragalactic HII regions AB - We present high-resolution observations of the giant extragalactic H II regions NGC 604, NGC 2363, NGC 5461, and NGC 5471, based on observations taken with the ISIS spectrograph on the William Herschel Telescope. We have detected, for the first time, C II and O II recombination lines in these objects. We find that recombination lines give larger C++ and O++ abundances than collisionally excited lines, suggesting that temperature variations may be present in the objects. We detect [Fe IV] lines in NGC 2363 and NGC 5471, the most confident detection of optical lines of this kind in H II regions. Considering the temperature structure, we derive their H, He, C, N, O, Ne, S, Ar, and Fe abundances. From the recombination lines of NGC 5461 and NGC 5471, we determine the presence of C/H and O/H gradients in M101. We calculate the DeltaY/DeltaO and DeltaY/DeltaZ values considering the presence of temperature variations and under the assumption of constant temperature. We obtain a better agreement with models of galactic chemical evolution by considering the presence of temperature variations than by assuming that the temperature is constant in these nebulae MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 40 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179681500017 L2 - galaxies : abundances;galaxies : ISM;HII regions;ISM : abundances;ISM : individual (NGC 604, NGC 5461, NGC 5471, NGC 2363);H-II REGIONS; HUBBLE-SPACE-TELESCOPE; EXCITATION COLLISION STRENGTHS; WOLF-RAYET GALAXIES; PLANETARY-NEBULAE; TEMPERATURE-FLUCTUATIONS; CHEMICAL-COMPOSITION; ABUNDANCE GRADIENTS; PHYSICAL CONDITIONS; CARBON ABUNDANCE SO - Astrophysical Journal 2002 ;581(1):241-257 5366 UI - 11596 AU - Esteves PM AU - Ramirez-Solis A AU - Mota CJA AD - Univ Fed Rio de Janeiro, Dept Quim Organ, Inst Quim, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoMota, CJA, Univ Fed Rio de Janeiro, Dept Quim Organ, Inst Quim, Cidade Univ CT Bloco A, BR-21949900 Rio De Janeiro, Brazil TI - The nature of superacid electrophilic species in HF/SbF5: A density functional theory study AB - A density functional theory study at the B3LYP/6-31++G** + RECP(Sb) level of the HF/SbF5 superacid system was carried out. The geometries of possible electrophilic species, such as H2F+.Sb2F11- and H3F2+.Sb2F11-, were calculated and correspond with available experimental results. Calculations of different equilibrium reactions involving HF and SbF5 allowed the relative concentration of the most energetically favorable species present in 1:1 HF/SbF5 solutions to be estimated. These species are H+.Sb2F11-, H2F+.Sb2F11-, H3F2+.Sb2F11-, and H4F3+-Sb2F11-, which correspond to 36.9, 16.8, 36.9, and 9.4%, respectively. Calculations of the acid strength of the electrophilic species were also performed and indicated that, for the same anion, the acid strength increases with the solvation degree. The entropic term also plays a significant role in proton-transfer reactions in superacid systems MH - Brazil MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000174435700058 L2 - HYDROGEN-DEUTERIUM EXCHANGE; PROTOLYSIS DEUTEROLYSIS; SINGLE BONDS; SYSTEM; ALKANES SO - Journal of the American Chemical Society 2002 ;124(11):2672-2677 5367 UI - 10049 AU - Estrada-Garcia MT AU - Jiang ZD AU - Adachi J AU - Mathewson JJ AU - Dupont HL AD - Univ Texas, Sch Publ Hlth, Ctr Infect Dis, Houston, TX, USAUniv Texas, Sch Med, Houston, TX, USASt Lukes Episcopal Hosp, Houston, TX 77030, USABaylor Coll Med, Houston, TX 77030, USAEstrada-Garcia, MT, IPN, CINVESTAV, Dept Biomed Mol, 2508 Zacatenco, Mexico City 07300, DF, Mexico TI - Intestinal immunoglobulin a response to naturally acquired enterotoxigenic Escherichia coli in US travelers to an endemic area of Mexico AB - Background: Simple methods for detecting secretory immunoglobulin A (sIgA) immune responses following natural enteric infection and oral immunization are needed. Methods: Fourteen students from the United States acquiring enterotoxigenic Escherichia coli(ETEC) diarrhea in Mexico were studied for fecal immunoglobulin A (IgA) response to their homologous infecting ETEC and to heat-labile (LT) toxin of ETEC using Dot-Blot microfiltration and enzyme-linked immunosorbent assay (ELISA) methods. Paired stool samples were collected on the day of presentation and 5 days later. Results: Twelve of 14 (86%) patients with ETEC diarrhea (5 heat-stable [ST]/LT positive, 4 LT-only, and 5 ST-only) developed sIgA antibodies directed against their homologous ETEC and 6 (66%) of the 9 patients harboring ST/LT or LT-only strains developed sIgA LT-antibody responses. Single fecal samples from 9 healthy controls were negative for ETEC specific antibodies. Conclusions: Patients with diarrhea due to noninvasive ST/LT ETEC and LT ETEC commonly produce a specific sIgA antibody response early in the illness. We feel that the methods employed will be useful to detect antibodies during natural infection by enteric pathogens and following oral enteric vaccine administration MH - Mexico|Distrito Federal MH - USA PB - HAMILTON: B C DECKER INC RP - NOT IN FILE U3 - TC 2 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 1195-1982 UR - ISI:000178623100005 L2 - ANTIBODY-RESPONSES; CHOLERA-TOXIN; DIARRHEA SO - Journal of Travel Medicine 2002 ;9(5):247-250 5368 UI - 8580 AU - Estrada-Venegas EG AU - Rodriguez-Navarro S AU - McMurtry JA AD - Colegio Postgrad, Programa Entomol & Acarol, Inst Fitosanidad, Montecillo 56230, Edo Mexico, MexicoUAM Xochimilco, Dept Prod Agr & Anim, Mexico City 04960, DF, MexicoOregon State Univ, Dept Entomol, Corvallis, OR 97331, USAEstrada-Venegas, EG, Colegio Postgrad, Programa Entomol & Acarol, Inst Fitosanidad, Km 35-5 Carr Mexico Texcoco, Montecillo 56230, Edo Mexico, Mexico TI - Some avocado mites from Michoacan, Mexico AB - The importance of the avocado crop (Persea americana var. Hass) in Mexico has increased during the last several years. Areas planted to avocado cover 124,829 ha with an average production of 8.5 ton/ha on irrigated lands. The objective of this study was to identify mite species associated with this crop. Orchards of P. americana var. Hass were sampled in seven of the most important producing counties in the State of Michoacan during 1997 and 1998. Eighteen species in nine families were found: six phytophagous, ten predatory and two species with diverse habits. Collections included representatives of the three most important phytophagous mite families - Eriophyidae, Tenuipalpidae and Tetranychidae MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - WEST BLOOMFIELD: INDIRA PUBLISHING HOUSE RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0164-7954 UR - ISI:000182603100008 L2 - Acari;Eriophyidae;Tenuipalpidae;Tetranychidae;mites;avacado;Persea americana;Michoacan;Mexico SO - International Journal of Acarology 2002 ;28(4):387-393 5369 UI - 9654 AU - Estrada M AU - Cerdeira A AU - Ortiz-Conde A AU - Sanchez FJG AU - Iniguez B AD - CINVESTAV, Secc Elect Estado Solido, Dept Ingn Elect, Mexico City 07300, DF, MexicoUniv Simon Bolivar, Lab Elect Estado Solido, Caracas 1080A, VenezuelaUniv Rovira & Virgili, Dept Ing Elect & Automat, Tarragona 43001, SpainEstrada, M, CINVESTAV, Secc Elect Estado Solido, Dept Ingn Elect, Av IPN No 2508,Apdo Postal 14-740, Mexico City 07300, DF, Mexico TI - Extraction method for polycrystalline TFT above and below threshold model parameters AB - A procedure is presented to extract above and sub-threshold model parameters in polysilicon TFTs. It is based on the integration of the experimental data current, which has the advantage of reducing the effects of experimental noise. This method is applied to the linear and saturation regions for the above-threshold regime and allows the extraction of all the above-threshold and sub-threshold parameters. We already presented a unified extraction method for the above threshold parameters of a-Si:H and polysilicon TFTs, where the above-threshold regime the mobility is modeled as a function of the gate voltage to a power. An integration procedure is used to extract the device model parameters. In this paper, we complete the extraction procedure to cover all the device operation regions, that is the sub-threshold and above-threshold regimes. The extraction procedure provides in addition the possibility of monitoring the crystallization process of a-Si:H TFTs into polysilicon, which has become a widely used process of fabricating low temperature polysilicon TFTs. The process of polycrystallization manifests itself by a variation and change in sign of one of the model parameters. Extracted parameters can be correlated to input parameters required by AIM-Spice circuit simulator for device modeling. The accuracy of the simulated curves using the extracted parameters is verified with measurements. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000179517100041 L2 - TFT modeling;parameter extraction procedure;TFT mobility modeling SO - Solid-State Electronics 2002 ;46(12):2295-2300 5370 UI - 11223 AU - Estrada P AU - Mavingui P AU - Cournoyer B AU - Fontaine F AU - Balandreau J AU - Caballero-Mellado J AD - Univ Lyon 1, CNRS, UMR5557, F-69622 Villeurbanne, FranceUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoBalandreau, J, Univ Lyon 1, CNRS, UMR5557, 43 Blvd 11 Novembre, F-69622 Villeurbanne, France TI - A N-2-fixing endophytic Burkholderia sp associated with maize plants cultivated in Mexico AB - In the frame of a survey of potentially endophytic N-2-fixing Burkholderia associated with maize in Mexico, its country of origin, the soil of an indigenous maize field near Oaxaca was studied. Under laboratory conditions, plant seedlings of two ancient maize varieties were used as a trap to select endophyte candidates from the soil sample. Among the N-2 fixers isolated from inside plant tissues and able to grow on PCAT medium, the most abundant isolates belonged to genus Burkholderia (API 20NE, rrs sequences). Representative isolates obtained from roots and shoots of different plants appeared identical (rrs and nifH RFLP), showing that they were closely related. In addition, their 16S rDNA sequences differed from described Burkholderia species and, phylogenetically, they constituted a separate deep-branching new lineage in genus Burkholderia. This indicated that these isolates probably constituted a new species. An inoculation experiment confirmed that these N-2-fixing Burkholderia isolates could densely colonize the plant tissues of maize. More isolates of this group were subsequently obtained from field-grown maize and teosinte plants. It was hypothesized that strains of this species had developed a sort of primitive symbiosis with one of their host plants, teosinte, which persisted during the domestication of teosinte into maize MH - France MH - Mexico|Morelos PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000175429100002 L2 - endophytic bacteria;nitrogen-fixation;Zea mays;Burkholderia;CYSTIC-FIBROSIS PATIENTS; SP-NOV; ACETOBACTER-DIAZOTROPHICUS; CEPACIA COMPLEX; PSEUDOMONAS-CEPACIA; SEQUENCE ALIGNMENT; NITROGEN FIXERS; SWEET CORN; BACTERIUM; SOIL SO - Canadian Journal of Microbiology 2002 ;48(4):285-294 5371 UI - 10195 AU - Etchenique R AU - Buhse T AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, DGIA&QF, INQUIMAE, RA-1428 Buenos Aires, DF, ArgentinaUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoEtchenique, R, Univ Buenos Aires, Fac Ciencias Exactas & Nat, DGIA&QF, INQUIMAE, Pab 2,Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina TI - Viscoelasticity in the diffuse electric double layer AB - The electroacoustical impedance of the quartz crystal microbalance (QCM) in contact with aqueous electrolyte solutions was measured using the transfer function method in a flow injection system. Measurements of both components of the impedance of the QCM, the resistance R and the inductive reactance XL, have been performed for modified and bare gold and silver surfaces and for different concentrations of several aqueous electrolyte solutions. For the experimental concentration range of 0-50 mM, unexpectedly the QCM impedance does not follow the Kanazawa equation, as is usual for bulk newtonian liquids. This behavior indicates the presence of a nanometric sized viscoelastic layer between the piezoelectric crystal and the bulk electrolyte solution. This layer can only be identified as the Gouy-Chapman diffuse double layer (DDL). Its elasticity and viscosity have been estimated by the measurement of R and XL. The viscoelasticity of the DDL appears to be independent of the chemical nature of the surface and of the solution viscosity but strongly dependent on the surface charge, the bulk electrolyte concentration and the dielectric constant of the solvent MH - Argentina MH - Mexico|Morelos PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2654 UR - ISI:000178348600014 L2 - QUARTZ-CRYSTAL MICROBALANCES; FREQUENCY IMPEDANCE ANALYSIS; LIQUIDS SO - Analyst 2002 ;127(10):1347-1352 5372 UI - 10590 AU - Ettinger AS AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Amarasiriwardena C AU - Hu H AD - Harvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAInst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62508, Morelos, Mexico TI - Influence of breastfeeding practices and bone lead burden on levels of lead in break milk over the course of lactation MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600863 SO - Epidemiology 2002 ;13(4):S248-S248 5373 UI - 9601 AU - Ezquerra-Brauer JM AU - Haard NF AU - Ramipez-Olivas R AU - Olivas-Burrola H AU - Velazquez-Sanchez CJ AD - Univ Sonora, Dept Invest & Posgrado Alimentos, Hermosillo 83000, Sonora, MexicoUniv Calif Davis, Inst Marine Resources, Dept Food Sci & Technol, Davis, CA 95616, USAEzquerra-Brauer, JM, Univ Sonora, Dept Invest & Posgrado Alimentos, POB 1658, Hermosillo 83000, Sonora, Mexico TI - Influence of harvest season on the proteolytic activity of hepatopancreas and mantle tissues from jumbo squid (Dosidicus gigas) AB - Jumbo squid (Dosidicus gigas) size and protease activities were evaluated after harvest in April (A) and November (N). A were smaller (560 120 g vs 6040 1130 g) and hepatopancreas was a larger percent of body weight (8.3+/-2.5 vs 4.6+/-2.1). Mantle from A had lower water (73.9+/-1.1 vs 79.1+/-1.2) and higher protein (29.0+/-1.1 vs 23.1+/-0.8). Lipid and protein contents of N and A hepatopancreas tissues did not differ (P<0.05). Azocaseinolytic, trypsin-like, chymotrypsin-like, aminopeptidase, and carboxypeptidase activities were detected in mantle (ME) and hepatopancreas extracts (HPE). HPE and ME from N had higher activity than A for all substrates (P<0.05). With azocasein substrate, HPE activity from A had a pH optimum of 5 - 6 and a temperature optimum of 70C, whereas HPE from N had highest activity at pH 9 and 40-70C ME from A had maximum proteolytic activity at pH 6 and 60C, whereas that from N had maximum activity at pH 10 and 40C SDS-PAGE zymograms of HPE from A and N revealed different patterns of activity and I and 2 major protease zones, respectively MH - Mexico|Sonora MH - USA PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Food Science & Technology U5 - J;Article AV - English IS - 0145-8884 UR - ISI:000179707000006 L2 - PROTEASE ACTIVITY; PURIFICATION; MUSCLE SO - Journal of Food Biochemistry 2002 ;26(5):459-475 5374 UI - 9539 AU - Fabila Y AU - Navarro L AU - Fujisawa T AU - Bode HR AU - Salgado LM AD - IPN, Dept Biochem, CINVESTAV, Mexico City, DF, MexicoNIG, Mishima, Shizuoka, JapanUCI, Dept Cell & Dev Biol, Irvine, CA, USASalgado, LM, IPN, Dept Biochem, CINVESTAV, Mexico City, DF, Mexico TI - Selective inhibition of protein kinases blocks the formation of a new axis, the beginning of budding, in Hydra AB - In Hydra, head regeneration and bud formation appear to be very similar processes. The fact that there are genes whose expression is specific for one of the two processes suggests that they do not have identical molecular bases. We analyzed the signal transduction pathways regulating bud development using inhibitors of protein kinase C, Src, PI3K and ERK. The four inhibitors reversibly blocked bud formation in Hydra when applied before stage 1. Once the bud reached stage 3, three of them had no effect and the bud developed normally. The inhibitors blocked the expression of Budhead, an early head marker, and of CnOtx which are specific for bud formation. The results are in agreement with the central role of a signaling pathway mediated by Src on bud development. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Developmental Biology U5 - J;Article AV - English IS - 0925-4773 UR - ISI:000179844300004 L2 - hydra;bud formation;kinase inhibitors;signal transduction;pattern formation;gene expression;development;Src;protein kinase C;P13K;ERK;FORKHEAD TRANSCRIPTION FACTOR; HEAD-ACTIVATION; TRANSPLANTATION PHENOMENA; EPITHELIAL-CELLS; GENE; HOMOLOG; DIFFERENTIATION; REGENERATION; MECHANISM; RESPONDS SO - Mechanisms of Development 2002 ;119(2):157-164 5375 UI - 11462 AU - Falcon LI AU - Escobar-Briones E AU - Romero D AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Sistemas Oceanog & Costeros, Mexico City 04510, DF, MexicoStony Brook Univ, Marine Sci Res Ctr, Stony Brook, NY 11794, USAUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca 62210, Morelos, MexicoEscobar-Briones, E, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Sistemas Oceanog & Costeros, AP 70-305, Mexico City 04510, DF, Mexico TI - Nitrogen fixation patterns displayed by cyanobacterial consortia in Alchichica crater-lake, Mexico AB - Alchichica is a saline crater-lake located in Mexico. Tufa grows on its periphery and a wind-driven Nodularia cf. spumigena bloom occurs annually. Fixation rates were assayed by the acetylene reduction method. Here, we describe the patterns of nitrogen fixation on two tufa forms before, during and after the bloom, as well as those from the planktonic cyanobacteria. We also analyzed the effect of ultraviolet radiation (under 390 nm) on the nitrogen fixation rates. Tufa showed light-stimulated nitrogen fixation, while N. cf. spumigena peaks in early morning and midnight. Both tufa forms diminished their nitrogen fixation rates after the planktonic bloom. UV radiation affected negatively nitrogen fixation rates in all forms MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000174759600005 L2 - UV radiation;benthos;plankton;tufa;Nodularia cf. spumigena;COMMUNITIES; REDUCTION; BACTERIA; DYNAMICS; UV SO - Hydrobiologia 2002 ;467(1-3):71-78 5376 UI - 10477 AU - Falkenberg G AU - Bunk O AU - Johnson RL AU - Rodriguez JA AU - Takeuchi N AD - Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Nacl Colombia, Dept Fis, Sede Bogota, ColombiaFalkenberg, G, DESY, HASYLAB, Notkestr 85, D-22603 Hamburg, Germany TI - Atomic structure of the indium-induced Ge(001)(nx4) surface reconstruction determined by scanning tunneling microscopy and ab initio calculations AB - Using scanning-tunneling microscopy (STM) and first-principles total-energy calculations, we have determined the atomic geometry of the superstructures formed by the adsorption of up to 0.5 monolayer of indium on Ge(001) and annealing at temperatures above 200 degreesC. A strong interaction between indium adatoms and the germanium substrate atoms leads to the formation of two different In-Ge subunits on the Ge(001) surface. In the subsaturation regime separate (nx4) subunits are observed where n can be either 3 or 4 and the STM images resemble those of the Si(001)-(3x4)-In and -Al reconstructions. An ordered arrangement of the subunits into a (7x4) reconstruction can be prepared at saturation coverage. The (3x4) subunits are well described by the pyramidlike model introduced by O. Bunk, G. Falkenberg, L. Seehofer, J. H. Zeysing, R. L. Johnson, M. Nielsen, R. Feidenhans'l, and E. Landermark, Appl. Surf. Sci. 123/124, 104 (1998) for In on Si(001). For the (4x4) subunit, we propose a model that includes the main features of the (3x4) subunit together with additional mixed Ge-In dimers. The atomic positions were optimized using ab initio total-energy calculations. The calculated local densities of states are in excellent agreement with the STM images MH - Colombia MH - Germany MH - Mexico|Baja California PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000177338500067 L2 - INDUCED SI(001)-(4X3) RECONSTRUCTION; X-RAY-DIFFRACTION; SI(100) SURFACE; HIGH-TEMPERATURE; GROWTH; ADSORPTION; PHASES; AL; MODEL SO - Physical Review B 2002 ;66(3): 5377 UI - 10451 AU - faro-Moreno E AU - Martinez L AU - Garcia-Cuellar C AU - Bonner JC AU - Murray JC AU - Rosas I AU - Rosales SPD AU - Osornio-Vargas AR AD - Inst Nacl Cancerol, Subdirecc Invest Basica, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNIEHS, NIH, Res Triangle Pk, NC 27709, USAUniv Nottingham, Nottingham NG7 2RD, EnglandInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoOsornio-Vargas, AR, Inst Nacl Cancerol, Subdirecc Invest Basica, Av San Fernando 22, Mexico City 14000, DF, Mexico TI - Biologic effects induced in vitro by PM10 from three different zones of Mexico City AB - Exposure to urban airborne particles is associated with an increase in morbidity and mortality. There is little experimental evidence of the mechanisms involved and the role of particle composition. We assessed cytotoxicity (crystal violet assay), apoptosis [terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) or annexin V assay], DNA breakage (comet assay), and production of proinflammatory mediators [tumor necrosis factor alpha (TNFalpha), interleukin 6 (IL-6), prostaglandin E-2 (PGE(2))] (enzyme-linked immunosorbent assay), and E-selectin (flow cytometry) in cell lines exposed to particulate matter < 10 μm in size (PM10) obtained from the northern, central, and southern zones of Mexico City. Particle concentrations ranged from 2.5 to 160 μg/cm(2). We used epithelial, endothelial, fibroblastic, and monocytic cells and assessed DNA damage in Balb-c cells, TNFα and IL-6 production in mouse monocytes, and PGE(2) in rat lung fibroblasts. We determined the expression of E-selectin in human endothelial cells and evaluated the cytotoxic potential of the PM10 samples in all cell types. PM10 from all three zones of Mexico City caused cell death, DNA breakage, and apoptosis, with particles from the north and central zones being the most toxic. All of these PM10 samples induced secretion of proinflammatory molecules, and particles from the central zone were the most potent. Endothelial cells exposed to PM10 from the three zones expressed similar E-selectin levels. Mexico City PM10 induced biologic effects dependent on the zone of origin, which could be caused by differences in the mixture or size distribution within particle samples. Our data suggest that particle composition as well as particle size should be considered in assessing the adverse effects of airborne particulate pollution MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 41 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000177546400032 L2 - apoptosis;cytotoxicity;DNA breakage;E-selectin;IL-6;Mexico City;particle composition;PGE(2);PM10;TNF alpha;PARTICULATE AIR-POLLUTION; ALVEOLAR MACROPHAGES; COARSE PARTICLES; MORTALITY; EXPRESSION; APOPTOSIS; FINE; INDUCTION; MONOCYTES; OUTDOOR SO - Environmental Health Perspectives 2002 ;110(7):715-720 5378 UI - 9531 AU - Felix-Medina R AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma Sinaloa, Escuela Ciencias Fisicomatemat, Culiacan, Sinaloa, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Toulouse 3, Phys Quant Lab, CNRS, F-31062 Toulouse, FranceFelix-Medina, R, Univ Autonoma Sinaloa, Escuela Ciencias Fisicomatemat, Culiacan, Sinaloa, Mexico TI - Spin moments, orbital moments and magnetic anisotropy of finite-length Co wires deposited on Pd(110) AB - The ground-state spin moments [S-z], orbital moments [L-z] and magnetic anisotropy energy (MAE) of Co-N one-dimensional (1D) clusters (N less than or equal to 12) deposited on the Pd(110) surface are determined in the framework of a self-consistent, real-space tight-binding method. Remarkably large total magnetic moments per Co atom, M-z = (2[S-z] + [L-z])/N = 2.8-2.9 mu(B), are obtained, which can be understood as the result of three physically distinct effects. The first and leading contribution is given by the local spin moments [S-iz] at the Co atoms i = 1, N (2[S-iz]Co similar or equal to 1 6 mu(B)). Second, significant spin moments are induced at the Pd atoms i > N close to the Co-Pd interface, which amount to about 25% of M-z (2[S-iz](Pd) = 0.2-0.3 mu(B)). Finally, enhanced orbital magnetic moments [L-iz] are responsible for approximately 20% of M-z. In the case of the Co atoms, [L-iz](Co) = 0.28-0.33 mu(B) is almost a factor of three larger than the Co bulk orbital moment, while in Pd atoms [L-iz](Pd) = 0.05 mu(B) represents about 15% of the total local moment mu(iz) = 2[S-iz] + [L-iz]. These results and the associated MAEs are analysed from a local perspective. The role of the cluster-surface interactions is discussed by comparison with the corresponding results for free-standing wires. Particularly in the case of monatomic 1D Co chains we observe that the lowest-energy magnetization direction (easy axis) changes from in line to off plane upon deposition on Pd(110). Wire-substrate hybridizations are therefore crucial for the magneto-anisotropic behaviour of 1D magnetic nanostructures on metallic substrates MH - France MH - Mexico|San Luis Potosi MH - Mexico|Sinaloa PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1367-2630 UR - ISI:000179915000001 L2 - ELECTRONIC-STRUCTURE; COBALT NANOCRYSTALS; TRANSITION-METALS; CLUSTERS; SURFACES; FILMS; FE; SUPERLATTICES; NANOWIRES; FE(110) SO - New Journal of Physics 2002 ;4(): 5379 UI - 11702 AU - Felix J AU - Berisso MC AU - Christian DC AU - Gara A AU - Gottschalk EE AU - Gutierrez G AU - Hartouni EP AU - Knapp BC AU - Kreisler MN AU - Lee S AU - Markianos K AU - Moreno G AU - Reyes MA AU - Sosa M AU - Wang MHLS AU - Wehmann A AU - Wesson D AD - Univ Guanajuato, Guanajuato, MexicoUniv Massachusetts, Amherst, MA 01003, USAFermilab Natl Accelerator Lab, Batavia, IL, USAColumbia Univ, Nevis Lab, New York, NY, USALawrence Livermore Natl Lab, Livermore, CA, USAUniv Michoacana, Morelia, Michoacan, MexicoFelix, J, Univ Guanajuato, Guanajuato, Mexico TI - Lambda(0) polarization in 800-GeV/cpp -> p(f) (Lambda K-0(+)) AB - We report results from a study of Lambda(0) polarization in the exclusive reaction pp --> p(f) (Lambda(0)K(+)) at 800-GeV/c. We observe a dependence of the polarization on the Lambda(0)K(+) invariant mass with large (+71%) positive polarization at small mass (1.63-GeV/c(2)) and large (-43%) negative polarization at large mass (2.75-GeV/c(2)). This observation confirms the result of the CERN ISR R608 experiment and extends the range over which the effect is observed. The strong dependence of the polarization on the Lambda(0)K(+) invariant mass suggests that the origin of the polarization is closely related to the production dynamics of the diffractively produced Lambda(0)K(+) system MH - Mexico|Guanajuato MH - Mexico|Michoacan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000173849300005 L2 - HYPERON POLARIZATION; INCLUSIVE PRODUCTION; HIGH-ENERGIES; QUARK POLARIZATION; MAGNETIC-MOMENT; 12-GEV PROTONS; ASYMMETRY; MODEL; TUNGSTEN SO - Physical Review Letters 2002 ;88(6): 5380 UI - 9722 AU - Feoli E AU - Badilla V AU - Bermudez M AU - Mendez E AU - Badilla X AD - Univ Latinoamer Ciencia & Tecnol Costa Rica, Res Ctr, San Jose, Costa RicaUniv Latinoamer Ciencia & Tecnol Costa Rica, Dept Expt Surg, San Jose, Costa RicaHosp Mexico, Serv Thorac Surg, Mexico City, DF, MexicoCaja Costarricense Seguro Social, Dept Epidemiol Vigilance, San Jose, Costa RicaFeoli, E, Univ Latinoamer Ciencia & Tecnol Costa Rica, Res Ctr, POB 5840-1000, San Jose, Costa Rica TI - Surgery in Costa Rica MH - Costa Rica MH - Mexico|Distrito Federal PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Article AV - English IS - 0004-0010 UR - ISI:000179661500024 SO - Archives of Surgery 2002 ;137(12):1435-1440 5381 UI - 10395 AU - Feria TP AU - Peterson AT AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAFeria, TP, Univ Missouri, Dept Biol, 8001 Nat Bridge Rd, St Louis, MO 63121 USA TI - Prediction of bird community composition based on point-occurrence data and inferential algorithms: a valuable tool in biodiversity assessments AB - Local biological communities are made up of species, each of which has its own particular relationship with the environment. To the extent that these autecological niches limit species' distributions, and by extension community composition, models of species' ecological niches can predict species composition at particular sites, or at least provide a null hypothesis of potential species composition in the absence of effects of species interactions. We developed distributional predictions (ecological niche models) for 89 species occurring in dry tropical forest in the Balsas Basin of south-western Mexico using an interpolation technique, and predicted the species likely to occur at 8 sites across the region. Onsite field inventory data were then used to test the community predictions, all of which were statistically significant. These results suggest that inventory efforts can be made more efficient by development beforehand of hypotheses that focus onsite collecting and inventory MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 24 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1366-9516 UR - ISI:000177683500001 L2 - community;birds;predicted distributions;ecological niche modelling;GEOGRAPHIC ANALYSIS; NATURE-RESERVES; NICHE; PRIORITY; AREAS SO - Diversity and Distributions 2002 ;8(2):49-56 5382 UI - 9549 AU - Fernald LC AU - Grantham-McGregor SM AD - Univ Calif Berkeley, Inst Business & Econ Res, Berkeley, CA 94720, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoUniv Coll London, Inst Child Hlth, Ctr Int Child Hlth, London, EnglandFernald, LC, Univ Calif Berkeley, Inst Business & Econ Res, Berkeley, CA 94720 USA TI - Growth retardation is associated with changes in the stress response system and behavior in school-aged Jamaican children AB - In the developing world, 39% of children <5 y old are short for their age (stunted, defined as height-for-age less than -2 So of National Center for Health Statistics references), and many have poor levels of mental development along with behavioral problems. We showed previously that 8- to 10-y-old children from a longitudinal cohort who experienced early childhood stunting had altered hypothalamic-pituitary-adrenocortical (HPA) and sympathetic-adrenomedullary (SAM) system activity. We repeated the study with 31 newly recruited, stunted Jamaican school children (less than -2.0 SD height-for-age) and nonstunted controls (n = 31, more than -1.0 SD height-for-age) matched for sex, age and school. All children were tested in a 1.5-h session, including psychological and physiologic stressors, in which their behaviors, salivary cortisol concentrations and heart rates were measured. In addition, we measured urinary catecholamine (epinephrine, norepinephrine, dopamine) concentrations, which were not reported for the children in the longitudinal cohort. After controlling for covariates that differed between groups (child intelligence quotient, body mass index and birth weight), stunted children had faster resting heart rates while lying and sitting (P < 0.05) and also during psychological testing (P < 0.05), as well as higher concentrations of urinary epinephrine (P < 0.05) and norepinephrine (P < 0.05), compared with nonstunted children. In addition, the stunted children were less happy (P < 0.01), more inhibited (P < 0.01) and more frustrated (P < 0.05) during the psychological tests than nonstunted children. These results suggest that growth retardation is associated with alterations in stress-sensitive systems, particularly the SAM system, and that this connection may contribute to the poor levels of development observed in stunted children MH - USA MH - United Kingdom MH - Mexico|Morelos PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 14 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000179833000018 L2 - stunting;linear growth retardation;stress sensitive systems;malnutrition;school age children;SALIVARY CORTISOL; CARDIOVASCULAR-RESPONSES; NUTRITIONAL SUPPLEMENTATION; SOCIOECONOMIC-STATUS; EARLY-CHILDHOOD; REACTIVITY; DISEASE; HEALTH; LIFE; NEUROENDOCRINE SO - Journal of Nutrition 2002 ;132(12):3674-3679 5383 UI - 11893 AU - Fernandez-Bertran J AU - Reguera E AU - Paneque A AU - Yee-Madeira H AU - Gordillo-Sol A AD - IPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoCtr Pharmaceut Chem, Havana, CubaUniv Havana, Inst Mat & Reagents, Havana, CubaYee-Madeira, H, IPN, Escuela Super Fis & Matemat, Edif 9 UP ALM Col Lindavista, Mexico City 07738, DF, Mexico TI - Mechanochemical reactions of telluric acid with alkaline fluorides AB - The mechanochemical reactions of telluric acid, Te(OH)(6) with alkaline fluorides (Na and K) have been studied using IR and XRD techniques. The reactions lead to the formation of hydrogen-bonding complexes, NaF.Te(OH)(6) and 2KF.Te(OH)(6). The reactions are free from side products such as alkali tellurates, alkali fluorotellurates or HF2_- salts. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-1139 UR - ISI:000173500000013 L2 - telluric acid;Bronsted acids;alkaline halides SO - Journal of Fluorine Chemistry 2002 ;113(1):93-95 5384 UI - 11222 AU - Fernandez-Bouzas A AU - Harmony T AU - Fernandez T AU - Aubert E AU - Ricardo-Garcell J AU - Valdes P AU - Bosch J AU - Casian G AU - Sanchez-Conde R AD - Ctr Neurobiol, Juriquilla 76230, Queretaro, MexicoCtr Neurociencias Cuba, Havana, CubaSecretariade Salud, Inst Mexicano Psiquiatria, Mexico City 07760, DF, MexicoSecretariade Salud, Hosp Juarez Mexico, Mexico City 07760, DF, MexicoFernandez-Bouzas, A, Ctr Neurobiol, Campus UNAM UAQ Juriquilla,Apartado Postal1-1141, Juriquilla 76001, Queretaro, Mexico TI - Sources of abnormal EEG activity in spontaneous intracerebral hemorrhage AB - This report describes the results obtained with EEG source analysis in the frequency domain (FD-VARETA), in 14 patients with brain hemorrhages; 6 hemorrhages were located in the putaminal region, 1 was mesencephalic and 7 were lobar cerebral hemorrhages, Our goal was to evaluate FDVARETA accuracy for the localization of fast growth expansive brain lesions. FD-VARETA produces brain electromagnetic tomography images of EEG sources in every frequency. The location of the most abnormal or the maximum Z value across all frequencies was compared with the location of spontaneous hemorrhages in computed tomographies (CT). In all patients the main source was within delta or theta bands. The spatial extent of the sources, in the brain atlas, at these frequency values was almost the same as the volume of hematoma in CT. Putaminal lesions produced larger regions of cortical deafferentation than lobar hematomas, with higher abnormal Z values. FD-VARETA was more accurate in locating the lesions than traditional maps of absolute and relative power in delta, theta, alpha and beta bands. Conclusion: FD-VARETA is a valuable procedure for the functional evaluation of brain hemorrhages MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - WHEATON: EEG & CLINICAL NEUROSCIENCE SOC (E C N S) RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Biomedical;Clinical Neurology U5 - J;Article AV - English IS - 0009-9155 UR - ISI:000175339900003 L2 - brain Hemorrhage;delta, theta, alpha, beta power;quantitative EEG;variable resolution electromagnetic tomography;BRAIN ELECTRICAL-ACTIVITY; CEREBRAL BLOOD-FLOW; LESIONS; TOMOGRAPHY; HEMATOMA SO - Clinical Electroencephalography 2002 ;33(2):70-76 5385 UI - 11123 AU - Fernandez-Zepeda JA AU - Vaidyanathan R AU - Trahan JL AD - Ctr Sci Res & Higher Educ Ensenada, Dept Comp Sci, Ensenada 22860, Baja California, MexicoLouisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USAFernandez-Zepeda, JA, Ctr Sci Res & Higher Educ Ensenada, Dept Comp Sci, CICESE Km 107 Carr, Ensenada 22860, Baja California, Mexico TI - Using bus linearization to scale the reconfigurable mesh AB - The reconfigurable mesh (R-Mesh) has drawn much interest in recent years due, in part, to its ability to admit extremely fast algorithms for a large number of problems. The unrestricted R-Mesh creates a great variety of bus shapes that facilitate algorithm design and reduce running time. In this paper, we present a bus linearization procedure that transforms an arbitrary non-linear bus configuration of an R-Mesh into an equivalent acyclic linear bus configuration implementable on a linear R-Mesh (LR-Mesh), a weaker version of the unrestricted R-Mesh. This procedure gives an algorithm designer the liberty of using buses of arbitrary shape, while automatically translating the algorithm to run on a simpler platform. We illustrate our bus linearization method through two important applications. The first leads to a faster scaling simulation for the unrestricted R-Mesh. This scaling simulation has an overhead of log N (smaller than the log P log N/P overhead of the previous fastest scaling simulation) and uses an exclusive write LR-Mesh as the simulating model; prior simulations needed concurrent write. The second application adapts algorithms designed for R-Meshes to run on models with pipelined optical buses. (C) 2002 Elsevier Science (USA) MH - Mexico|Baja California MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0743-7315 UR - ISI:000175601500001 L2 - bus linearization;reconfigurable architectures and algorithms;reconfigurable mesh;algorithm scalability;concurrent write rules;pipelined optical bus;PROCESSOR ARRAYS; ALGORITHMS; SIMULATION; NETWORK; POWER SO - Journal of Parallel and Distributed Computing 2002 ;62(4):495-516 5386 UI - 10237 AU - Fernandez B AU - Ugalde E AU - Urias J AD - CNRS, Ctr Phys Theor, F-13288 Marseille 09, FranceUASLP, Inst Invest Comunicac Opt, San Luis Potosi, MexicoFernandez, B, CNRS, Ctr Phys Theor, Case 907, F-13288 Marseille 09, France TI - Spectrum of dimensions for Poincare recurrences of Markov maps AB - The spectrum of dimensions for Poincare recurrences of Markov maps is obtained by constructing a sequence of approximating maps whose spectra are known to be solution of non-homogeneous Bowen equations. We prove that the spectrum of the Markov map also satisfies such an equation MH - France MH - Mexico|San Luis Potosi PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000178082600002 L2 - Markov maps;Poincare recurrences;spectra of dimensions SO - Discrete and Continuous Dynamical Systems 2002 ;8(4):835-849 5387 UI - 11648 AU - Fernandez CDJ AU - Mielnik B AU - Rosas-Ortiz O AU - Samsonov BF AD - CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoWarsaw Univ, Inst Theoret Phys, PL-02093 Warsaw, PolandTomsk VV Kuibyshev State Univ, Dept Quantum Field Theory, Tomsk 634050, RussiaFernandez, CDJ, CINVESTAV, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - The phenomenon of Darboux displacements AB - For a class of Schrodinger Hamiltonians the supersymmetry transformations can degenerate to simple coordinate displacements. We examine this phenomenon and show that it distinguishes the Weierstrass potentials including the one-soliton wells and periodic Lame functions. A supersymmetric sense of the addition formula for the Weierstrass functions is elucidated. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000174138100008 L2 - supersymmetry;factorization;addition laws;SUPERSYMMETRIC QUANTUM-MECHANICS; PERIODIC POTENTIALS; SCHRODINGER-EQUATION; CHAINS SO - Physics Letters A 2002 ;294(3-4):168-174 5388 UI - 10972 AU - Fernandez DJ AU - Mielnik B AU - Rosas-Ortiz O AU - Samsonov BF AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUW, Inst Theoret Phys, Warsaw, PolandTomsk VV Kuibyshev State Univ, Dept Quantum Field Theory, Tomsk 634050, RussiaFernandez, DJ, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Nonlocal supersymmetric deformations of periodic potentials AB - Irreducible second-order Darboux transformations are applied to the periodic Schrodinger operators. It is shown that for the pairs of factorization energies inside the same forbidden band they can create new nonsingular potentials with periodicity defects and bound states embedded in the spectral gaps. The method is applied to the Lam,6 and periodic piece-wise transparent potentials. An interesting phenomenon of translational Darboux invariance reveals nonlocal aspects of the supersymmetric deformations MH - Mexico|Distrito Federal MH - Poland MH - Russia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176009900012 L2 - SCHRODINGER-EQUATION; QUANTUM-MECHANICS; DERIVATIVE SUPERSYMMETRY; DARBOUX TRANSFORMATION; BREAKDOWN; STATES SO - Journal of Physics A-Mathematical and General 2002 ;35(19):4279-4291 5389 UI - 11060 AU - Fernandez DJ AU - Mielnik B AD - CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUW, Inst Theoret Phys, Warsaw, PolandFernandez, DJ, CINVESTAV, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Comment on "Charged particles in a rotating magnetic field" AB - We point out that the perturbative method of Qiong-gui Lin misses some exact solutions and some physical effects, which could be of interest for experimental areas MH - Mexico|Distrito Federal MH - Poland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Letter AV - English IS - 1050-2947 UR - ISI:000175744300085 L2 - WAVE-PACKETS; ELECTRON; PHASE SO - Physical Review A 2002 ;65(5): 5390 UI - 10271 AU - Ferrari L AU - Petrone CM AU - Francalanci L AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76001, Queretaro, MexicoUniv Florence, Dipartimento Sci Terra, I-50121 Florence, ItalyFerrari, L, Univ Nacl Autonoma Mexico, Ctr Geociencias, Campus Juriquilla,Apdo Postal 1-742, Queretaro 76001, Queretaro, Mexico TI - Generation of oceanic-island basalt-type voicanism in the western Trans-Mexican volcanic belt by slab rollback, asthenosphere infiltration, and variable flux melting: Reply MH - Italy MH - Mexico|Queretaro PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 1 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000177937900026 L2 - MAGMAS SO - Geology 2002 ;30(9):858-859 5391 UI - 11816 AU - Ferreira-Nuno A AU - Overstreet DH AU - Morales-Otal A AU - Velazquez-Moctezuma J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoUniv N Carolina, Ctr Alcohol Studies, Chapel Hill, NC 27599, USAVelazquez-Moctezuma, J, Univ Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, Mexico TI - Masculine sexual behavior features in the Flinders sensitive and resistant line rats AB - The Flinders sensitive (FSL) and resistant (FRL) lines of rats have been selectively bred for their differences in cholinergic sensitivity. The FSL rats display hypersensitive responses to agonists of muscarinic receptors. In addition, the FSL rats display behavioral alterations that support the notion that this strain could be useful as an animal model of depression. These abnormalities include increase in rapid eye movement sleep, decrease of saccharin consumption after stress, and reduced exploratory behavior in a novel open field. On the other hand, sexual behavior is a pleasure-seeking behavior that should be altered in a mood disorder characterized by anhedonia. In the present study, spontaneous masculine sexual behavior features were analyzed, both during 30-min tests as well as during a satiety test. Results showed that, compared to outbred Sprague-Dawley (SD) rats, both the FSL and the FRL rats displayed some behavioral impairment, like a marked decrease of the ejaculatory frequency. During the satiety tests, both the FSL and the FRL rats became exhausted sooner than their SD controls. In addition to considering the present results in terms of alterations in specific neurotransmitter systems, endogamy is proposed as a possible source of the behavioral alterations. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000173903200001 L2 - masculine sexual behavior;animal models of depression;Flinders rats;INCREASED CHOLINERGIC FUNCTION; GENETIC ANIMAL-MODEL; INCREASED REM-SLEEP; DEPRESSION; HYPERACTIVITY; OXOTREMORINE; FERTILITY SO - Behavioural Brain Research 2002 ;128(2):113-119 5392 UI - 9838 AU - Ferreira A AU - Pereira M AU - Agrati D AU - Uriarte N AU - Fernandez-Guasti A AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoUniv Republica, Fac Ciencias, Montevideo, UruguayFernandez-Guasti, A, IPN, CINVESTAV, Dept Farmacobiol, Calzada Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Role of maternal behavior on aggression, fear and anxiety AB - Concomitant to the expression of maternal behavior, the lactating female develops anxiolysis in the elevated plus maze test, aggression towards intruders and reduced fear in response to a sudden auditory stimulus. This study aims to determine if these behavioral changes are associated with maternal behavior independently of the endocrine status that characterizes gestation, parturition and lactation. To assess this purpose, the behavior of lactating females was compared to that exhibited by maternal and nonmaternal ovariectomized rats untreated with steroid hormones. In contrast with lactating dams, sensitized animals (rats that displayed maternal behavior after a continuous contact with young pups) did not display reduced anxiety in the plus maze test. However, the sensitized females showed behaviors characteristic of lactating rats, such as some components of maternal aggression and reduced fear, though much less intensely than dams. These results suggest that aggression and reduced fear, but not anxiolysis, partially depend on the development of maternal behavior. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Uruguay PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000179170700004 L2 - maternal aggression;fear;anxiety;sensitization;maternal behavior;HYPOTHALAMIC PARAVENTRICULAR NUCLEUS; RATS RATTUS-NORVEGICUS; FEMALE RATS; BURYING BEHAVIOR; LACTATING RAT; VIRGIN FEMALE; NORWAY RATS; PUP STIMULI; PLUS-MAZE; PROGESTERONE SO - Physiology & Behavior 2002 ;77(2-3):197-204 5393 UI - 10065 AU - Ferreira G AU - Gutierrez R AU - De la Cruz V AU - Bermudez-Rattoni F AD - Univ Nacl Autonoma Mexico, Dept Neurosci, Inst Cellular Physiol, Mexico City 04510, DF, MexicoUniv Tours, Lab Anim Behav, UMR 6073, CNRS,INRA, F-37380 Nouzilly, FranceBermudez-Rattoni, F, Univ Nacl Autonoma Mexico, Dept Neurosci, Inst Cellular Physiol, Apartado Postal 70-253, Mexico City 04510, DF, Mexico TI - Differential involvement of cortical muscarinic and NMDA receptors in short- and long-term taste aversion memory AB - In conditioned taste aversion, an animal avoids a taste previously associated with toxic effects, and this aversive memory formation requires an intact insular cortex. In this paper, we investigated the possible differential involvement of cholinergic and glutamatergic receptors in the insular cortex in short-term memory (STM) and long-term memory (LTM) of taste aversion in rats. Taste aversion was induced by intraperitoneal administration of lithium chloride (a malaise-inducing drug) 15 min after experience with an unfamiliar taste. In order to test STM and LTM of taste aversion, taste stimulus was again presented 4 h and 72 h after lithium injection, respectively. During the acquisition, microinjection of the muscarinic antagonist, scopolamine, in the insular cortex before, but not after, the presentation of the new taste, abolished STM as well as LTM. Blockade of the NMDA receptor, in the insular cortex, by AP5 before, but not after, the presentation of the taste stimulus, impaired LTM but left STM intact. Moreover, when injected 1 h after malaise induction (i.e., during taste-illness association), AP5 disrupted both STM and LTM. These results suggest that activation of muscarinic receptors in the insular cortex is involved in the acquisition of taste memory, whereas NMDA receptors participate in taste memory consolidation. These data demonstrate that different neurochemical mechanisms subserve different memory phases. NMDA receptors are also probably involved in processing the visceral input, thus allowing subsequent taste-illness association. This indicates that in the same cortical area the same neurotransmitter system can be involved in distinct processes: taste memory consolidation vs. taste-illness association MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000178538800016 L2 - acetylcholine;conditioned taste aversion;glutamate;learning;long-term memory;short-term memory;Wistar rats;INSULAR CORTEX DISRUPTS; D-ASPARTATE RECEPTORS; PROTEIN-SYNTHESIS; NEUROTRANSMITTER SYSTEMS; TYROSINE PHOSPHORYLATION; INHIBITORY AVOIDANCE; CHOLINERGIC ACTIVITY; UNFAMILIAR TASTE; CONDITIONAL FEAR; BASAL FOREBRAIN SO - European Journal of Neuroscience 2002 ;16(6):1139-1145 5394 UI - 10375 AU - Ficarra G AU - Mosqueda-Taylor A AU - Carlos R AD - Univ Florence, I-50121 Florence, ItalyAzienda Osped Careggi, Sect Oral Pathol & Med, Careggi, ItalyUniv Autonoma Metropolitana Xochimilco, Dept Oral Med & Pathol, Mexico City, DF, MexicoHosp herrera, Dept Pathol, Guatemala City, GuatemalaFicarra, G, Dept Odontol & Stomatol, Sect Oral Pathol & Med, Viale Morgagni 85, I-50134 Florence, Italy TI - Silicone granuloma of the facial tissues: A report of seven cases AB - The liquid form of silicone, called dimethicone (dimethylpolysiloxane), has been used extensively in some countries during the past 4 decades for soft tissue augmentation. Although considered biologically inert, this material has been reported as potentially inducing, after tissue injection, a granulomatous inflammatory response of variable severity. Interestingly, a remarkable paucity of reports exists about the development of complications after injections of liquid silicone into the facial tissues, especially considering its high frequency of use. The purpose of this article is to describe the clinical and microscopic features of 7 cases of silicone-induced granulomas that developed after injection of the facial tissues for cosmetic purposes and to discuss the differential diagnosis and management of this condition MH - Guatemala MH - Italy MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 15 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1079-2104 UR - ISI:000177751300014 L2 - INJECTION; AUGMENTATION; MINOCYCLINE; IMPLANTS; FACE SO - Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontics 2002 ;94(1):65-73 5395 UI - 8872 AU - Fiddy SG AU - Bogdanchikova NE AU - Petranovskii VP AU - Ogden JS AU - valos-Borja M AD - Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England. UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - EXAFS and optical spectroscopy characterisation of silver within zeolite matrices AB - The study of silver-zeolite samples by a combination of EXAFS and Diffuse Reflectance UV-Visible spectroscopy has been utilised to discover the effect of the structural type and Si/Al ratio of zeolite matrix as well as influence of reduction temperature on the size, structure and oxidation of silver species stabilised inside zeolite voids. The preparation of silver-zeolite samples at high temperature using mordenite with medium Bronsted acid strength or at low temperature using mordenite with high acid strength leads to fast oxidation of reduced silver species. After reduction at medium temperatures silver clusters interpreted as Ag-8(0) and Ag-8(delta+) are formed in mordenites with intermediate Bronsted acid strength. The reduction of silver samples at high temperature utilising mordenite with a very small concentration of weak Bronsted acid sites leads to the formation of amorphous Ag particles. Deformation of the eight-atom clusters is more prominent in the erionite cavities, where space is more severely restricted than in mordenite channels. It is proposed that the charged Ag-8(delta+) clusters are more deformed than neutral Ag-8(0) clusters MH - United Kingdom MH - Mexico|Baja California T3 - IMPACT OF ZEOLITES AND OTHER POROUS MATERIALS ON THE NEW TECHNOLOGIES AT THE BEGINNING OF THE NEW MILLENNIUMStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticle0SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALPart A&BBW36C AV - English IS - 0167English-2991 UR - ISI:000181696400241 SO - 2002 ;():1939-1946 5396 UI - 10463 AU - Fierro R AU - Schwed P AU - Foliguet B AU - Grignon G AU - Bene MC AU - Faure G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Mexico City, DF, MexicoBikur Holim Hosp, Gynecol Serv, Jerusalem, IsraelFac Med, Lab Microscopie Elect, Nancy, FranceFac Med, Immunol Lab, Nancy, FranceFierro, R, Univ Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Apdo Postal 55-535, Mexico City, DF, Mexico TI - Expression of IL-2 alpha and IL-2 beta receptors on the membrane surface of human sperm AB - Cytokines are secreted proteins that act as local immunological mediators. Increased seminal cytokine concentrations are associated with fertility problems. The Purpose of the present study was to investigate the presence of 1L-2alpha, and 1L-2beta receptors on fresh and isolated sperm by flow cytometry and transmission electron microscopy. Twenty sperm samples from oligospermic men were incubated with CD25, a mouse monoclonal antibody specific for IL-2alpha-chain receptor, and CD122, a mouse monoclonal antibody specific for 1L-2beta-chain receptor. The strong initial fluorescence intensity and, subsequently, a labeling index yielded by CD25 and CD122 decreased in sperm centrifuged on a Percoll gradient (p < .05). The expression of CD25 and CD 122 correlated negatively with fresh sperm concentration, but in sperm centrifuged on a Percoll gradient there was no correlation. Labeling with CD25 and CD122 antibody was evident on the head and the middle piece in fresh sperm, while in sperm centrifuged on a Percoll gradient a weak labeling was observed only on the principal piece. The authors have identified and localized cytokine receptors on human sperm for the first time. Cytokine receptors may be involved in the regulation of pathophysiological events in sperm cell functions and male infertility. The exact pathway involved in modulation of these receptors requires further investigation. These results contribute to the understanding of cytokine-sperm relationships MH - France MH - Israel MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 3 U4 - Andrology U5 - J;Article AV - English IS - 0148-5016 UR - ISI:000177524100010 L2 - cytokines;flow cytometry;human sperm;oligozoospermy;transmission electron microscopy;NECROSIS-FACTOR-ALPHA; INTERFERON-GAMMA; MOTION PARAMETERS; INFERTILITY; MOTILITY; SEMEN; MACROPHAGES; LYMPHOKINES; CYTOKINES; MONOKINES SO - Archives of Andrology 2002 ;48(5):397-404 5397 UI - 10951 AU - Filshtinsky ML AU - Rodriguez-Ramos R AU - Sanchez-Casals O AU - Serrania F AD - Univ La Habana, Fac Matemat & Computac, Dept Ecuac Diferenciales, Havana 10400, CubaSumy State Univ, Dept Mat Phys, UA-244007 Sumy, UkraineICIMAF, Havana, CubaInst Ingn, Sec Automatizac, Coyoacan 04510, DF, MexicoRodriguez-Ramos, R, Univ La Habana, Fac Matemat & Computac, Dept Ecuac Diferenciales, San Lazaro & L, Havana 10400, Cuba TI - Squeezing of composite piezoceramic plate under the loading of regular normal pressure AB - The electroelastic boundary value problem for thin composite plate of arbitrary configuration is studied under the action of regular normal pressure. The plane deformation parallel to the direction of the piezoceramic polarization is considered. The representation of the electroelastic magnitudes through three arbitrary analytic functions with complex variable is used. Using the fundamental solution for unbounded composite plate, the integral representations of complex potentials are constructed. The mechanical and electric boundary conditions at the interface of the composite plate are satisfied. Then, the corresponding boundary value problem is reduced to a system of singular integral equations of second order with fixed singularity. The solution of the problem is obtained. Numerical results using the algorithm of the quadrature method are shown. (C) 2002 Elsevier Science Inc. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Ukraine PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0096-3003 UR - ISI:000176137600013 L2 - composites;fracture mechanics;cracks;piezoelectricity;FRACTURE-MECHANICS SO - Applied Mathematics and Computation 2002 ;129(2-3):407-419 5398 UI - 11539 AU - Fimbres H AU - Kawas JR AU - Hernandez-Vidal G AU - Picon-Rubio JF AU - Lu CD AD - Univ Autonoma Nuevo Leon, Fac Med Vet, Dept Nutr & Metab Anim, Monterrey 64930, NL, MexicoSUNY Morrisville, Sch Agr & Nat Resources, Morrisville, NY 13408, USALu, CD, Univ Autonoma Nuevo Leon, Fac Med Vet, Dept Nutr & Metab Anim, Lazaro Cardenas 4600, Monterrey 64930, NL, Mexico TI - Nutrient intake, digestibility, mastication and ruminal fermentation of lambs fed finishing ration with various forage levels AB - This study was conducted to determine the effect of hay level in the finishing ration for lambs on intake, digestibility, nitrogen retention, mastication and ruminal parameters. Twenty Pelibuey growing male lambs, weighing an average of 36 kg, were assigned to one of the four treatment groups according to a completely randomized arrangement. Treatments were: 0, 10, 20 and 30% chopped hay. Dry matter (DM) intake increased linearly (P < 0.05) with an increase in hay percentage from 0 to 30% in the ration. There was a 38% difference in DM intake between lambs consuming the ration without hay and that with 30% hay, corresponding with DM intake of 61.1 and 84.8 g/kg(0.75). Rumination time varied from 2.4 h per day in lambs fed the ration without hay to 6.9 h per day in lambs fed the ration with 30% hay. Eating time varied from 1.5 to 2.9 h, and increased as the quantity of hay in the ration increased. DM digestibility was 85.5, 79.9, 67.5 and 66.6% for 0, 10, 20 and 30% hay ration, respectively. Neutral detergent fiber (NDF) digestibility was 59.4, 58.2, 42.5 and 35% for 0, 10, 20 and 30% hay ration, respectively. Digestibility of non-structural carbohydrates (NSCs) decreased linearly from 94.2% for the ration without hay to 86.6% for the ration with 30% hay. Retained N (%) decreased linearly (P < 0.01) as the hay in the ration increased, probably related to less readily available energy. Ruminal pH increased linearly (P > 0.01) as the hay in the ration increased. Concentration and molar percentage of acetate increased linearly (P < 0.01) as hay level in the ration increased, while propionate concentration decreased. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000174580300011 L2 - lambs;intake;digestibility;mastication;finishing ration;CONCENTRATE; STEERS; PERFORMANCE; SHEEP; FLUID; DIET; PH SO - Small Ruminant Research 2002 ;43(3):275-281 5399 UI - 11540 AU - Fimbres H AU - Hernandez-Vidal G AU - Picon-Rubio JF AU - Kawas JR AU - Lu CD AD - SUNY Morrisville, Sch Agr & Nat Resources, Morrisville, NY 13408, USAUniv Autonoma Nuevo Leon, Fac Med Vet & Zootecnia, Dept Nutr & Metab Anim, Monterrey 66470, NL, MexicoLu, CD, SUNY Morrisville, Sch Agr & Nat Resources, Morrisville, NY 13408 USA TI - Productive performance and carcass characteristics of lambs fed finishing ration containing various forage levels AB - This study was conducted to determine the effect of forage level in the finishing ration on productive performance and carcass characteristics in lambs. Twenty male Pelibuey lambs, weighing 24 kg, were assigned to one of the four groups according to a completely randomized design. Each group received one of the four treatments with hay levels at 0, 10, 20 or 30%. Lambs were individually confined to 1.5 m(2) metabolic cages. Dry matter (DM) intake was 48.9% greater for the 30% hay ration than for ration without hay during the entire 60-day-period, as compared to a 56.6% increase during the first 30 days. However, greater hay levels in the ration were associated with lower weight gain. Period differences were also noted, with an average daily gain of 268 g during the first 30 days, and a much lower (P < 0.01) average daily gain of 149 g during the last 30 days. It appeared that the more days the lambs stayed on feed, the less was their weight gain. Feed efficiency of the lambs during the first 30 days (5.0) was greater than during the last 30 days (10.1). Cold and hot carcass weights (kg) decreased (linear, P < 0.05) as the level of hay in the ration increased. Full gastrointestinal tract weight tended to increase with an increase in the hay level of the ration. However, there was no treatment effect on the weight of empty gastrointestinal tracts. Hay level in the ration did not affect marbling score, degree of finishing, external fat or longissimus muscle (ribeye) area. No effect of hay level in the ration was observed on weight of skin, liver, lungs, testicles or blood. First and second yield carcass grade reduced (linear, P < 0.001) as the level of hay in the ration increased. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000174580300012 L2 - lambs;finishing ration;forage;carcass;weight gain;GROWING LAMBS; ROUGHAGE LEVEL; FEEDLOT STEERS; WEIGHT-GAIN; ENERGY; CONCENTRATE; DIETS; NUTRITION SO - Small Ruminant Research 2002 ;43(3):283-288 5400 UI - 9450 AU - Fischer RA AU - Santiveri F AU - Vidal IR AD - ACIAR, Canberra, ACT 2601, AustraliaCIMMYT, Mexico City 06600, DF, MexicoCtr UdL IRTA, Area Cultius Extensius, Lleida 25198, SpainConcepcion Univ, Fac Agron, Chillan, ChileFischer, RA, ACIAR, GPO Box 1571, Canberra, ACT 2601, Australia TI - Crop rotation, tillage and crop residue management for wheat and maize in the sub-humid tropical highlands I. Wheat and legume performance AB - Cropping systems in the sub-humid tropical highlands are characterised by continuous cultivated cereal monoculture, leading to serious erosion and fertility decline. There is a lack of information on the impact on crop performance of improved agronomy designed to counter these problems, in particular crop rotation, the use of legumes, reduced tillage and crop residue retention. Over the period 1991-1995 an experiment to test improved agronomy was carried out in the central highlands of Mexico, at El Batan (latitude 19degreesN, longitude 99degreesW, altitude 2250 m). Under rainfed conditions (mean annual rainfall 603 mm, one crop per year), binary rotations (with phased entry) of wheat-maize, wheat-vetch and wheat-medic pasture were compared with continuous wheat and maize; most rotations were tested under the four combinations of tillage (cultivated versus zero) and crop residue (retained versus harvested). All plots were split for nitrogen fertiliser, and appropriate herbicides were used for weed control. Wheat grain yields are reported here for the first two complete cycles of the binary rotations (1992-1995), which comprised two dry years and two wet ones. Continuous wheat yielded slightly better than wheat after maize (3679 kg/ha versus 3441 kg/ha at 10% moisture), while wheat after vetch fluctuated, being superior in the wetter years and inferior in drier ones, the latter effect associated with lower soil water and greater plant water stress. Wheat after medic was only tested under zero tillage, and was superior most years (4123 kg/ha), compared to vetch-wheat (3925 kg/ha), wheat-wheat (3658 kg/ha) and maize-wheat (3356 kg/ha). Part of the yield benefit of wheat after legumes could be attributed to a lower responsiveness of yield to nitrogen fertiliser. Overall yield was unaffected by tillage, although zero tillage was significantly higher in the drier 2 years. Besides, for wheat after vetch, zero tillage was consistently superior, especially in the drier years. Overall yield was unaffected by straw residue retention, but there was a significant increase in the driest year. Yield components, disease levels and weed counts are reported. Of significance was the greater level of tan spot in zero till residue-retained wheat after wheat and after maize, the greater number of weeds in zero till wheat after legume, and the suppressive effect of cereal residue on grass weeds. Maize yields and overall economic performance of the different systems are presented in a subsequent paper (Fischer et al., 2002). (C) 2002 Elsevier Science B.V. All rights reserved MH - Australia MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000180281700002 L2 - Triticum aestivum;Zea mays;Vicia sativa;Medicago polymorpha;crop rotation;zero tillage;residue management;weed incidence;LEY-FARMING SYSTEMS; CONSERVATION TILLAGE; FIXED N; PASTURE SO - Field Crops Research 2002 ;79(2-3):107-122 5401 UI - 9451 AU - Fischer RA AU - Santiveri F AU - Vidal IR AD - ACIAR, Canberra, ACT 2601, AustraliaCIMMYT, Mexico City 06600, DF, MexicoCtr UdL IRTA, Area Cultius Extensius, Lleida 25198, SpainConcepcion Univ, Fac Agron, Chillan, ChileFischer, RA, ACIAR, GPO Box 1571, Canberra, ACT 2601, Australia TI - Crop rotation, tillage and crop residue management for wheat and maize in the sub-humid tropical highlands II. Maize and system performance AB - Cropping systems in the sub-humid tropical highlands are characterised by continuous cultivated cereal monoculture, leading to serious erosion and fertility decline. There is a lack of information on improved agronomy, in particular crop rotation, the use of legumes, reduced tillage and crop residue retention, designed to counter these problems. Over the period 1991-1995 an experiment was carried out in the central highlands of Mexico, at El Batan (latitude 19degrees31'N, longitude 98degrees50'W, altitude 2250 m) to test the effect of improved agronomy. Under rainfed conditions (mean annual rainfall 603 turn, one crop per year), binary rotations of maize-wheat, maize-vetch, wheat-vetch and wheat-medic pasture were compared with continuous wheat and maize. Most rotations were tested under the four combinations of tillage (zero versus cultivated) and crop residue (retained versus harvested). All plots were split for nitrogen fertilizer, and appropriate herbicides were used for weed control. Maize after wheat outyielded continuous maize under all conditions of tillage, residue and nitrogen fertilization. Within the maize-wheat rotation, zero tillage with residue retention was clearly superior (average yield across N levels of 5025 kg/ha at 10% moisture) to the other tillage-residue combinations (average 4249 kg/ha), and during dry periods, showed less wilting. With continuous maize, yield was especially poor with zero tillage regardless of residue (average 3113 kg/ha), and this was associated with poor early growth and variable stunting even under wet conditions and for which there is no clear explanation. Maize after vetch yielded well with zero tillage (4372 kg/ha), but poorly with cultivation (3128 kg/ha), possibly due to less soil water at sowing in the latter. The main treatment yield variation was associated with either wilting score or radiation interception or both, all measured before tasseling. Observations of ponding and runoff during rain events indicated that runoff was negligible where crop residue was retained on the surface with zero tillage, but significant in all the other tillage-residue combinations. Without nitrogen, maize after vetch outyielded the other rotations, but these latter yielded more with N, having a much greater response to fertilizer nitrogen (18.4 kg/kg versus 4.5 kg/kg). The average net economic benefit, calculated for each cropping system by partial budgeting, was best for farmer practice with fertilizer, although vetch-maize with zero tillage and residue removal, and wheat-maize with cultivation and residue removal, both with nitrogen fertilizer, were close behind this treatment. Residue retention was disadvantaged by the high value of residues as fodder, and Wheat rotations by the lower yield relative to maize, for no grain price advantage in the Mexican market. (C) 2002 Elsevier Science B.V. All rights reserved MH - Australia MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000180281700003 L2 - Zea mays;Triticum aestivum;Vicia sativa;crop rotation;zero tillage;residue management;net economic benefit;CONSERVATION TILLAGE; SOIL SO - Field Crops Research 2002 ;79(2-3):123-137 5402 UI - 11126 AU - Flammenkamp A AU - Luca F AD - Univ Bielefeld, Fak Math, D-33501 Bielefeld, GermanyUNAM, Inst Math, Morelia 58089, Michoacan, MexicoFlammenkamp, A, Univ Bielefeld, Fak Math, Postfach 10 01 31, D-33501 Bielefeld, Germany TI - Binomial coefficients and Lucas sequences MH - Germany MH - Mexico|Michoacan PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0022-314X UR - ISI:000175592900006 L2 - DIOPHANTINE EQUATIONS; ALGEBRAIC-NUMBERS; LOWER BOUNDS; POWERS SO - Journal of Number Theory 2002 ;93(2):246-284 5403 UI - 10617 AU - Fleming AS AU - Kraemer GW AU - Gonzalez A AU - Lovic V AU - Rees S AU - Melo A AD - Univ Toronto, Erindale Coll, Dept Psychol, Mississauga, ON L5L 1C6, CanadaUniv Wisconsin, Wisconsin Primate Ctr, Dept Kinesiol, Madison, WI, USAUniv Autonoma Tlaxcala, CINVESTAV, Ctr Invest Reprod Anim, Mexico City, DF, MexicoFleming, AS, Univ Toronto, Erindale Coll, Dept Psychol, Mississauga, ON L5L 1C6, Canada TI - Mothering begets mothering: The transmission of behavior and its neurobiology across generations AB - Early experiences exert their effects on adult parental behavior in part by altering the development of neurobiological mechanisms that initiate or support the initiation and sustenance of adult parental behavior. The effects of parental behavior on sensory, perceptual and emotional mechanisms in offspring constitute an experientially based mechanism by which neurobiological factors regulating behavior can be transferred from generation to generation somewhat independently of genetic endowment. (C) 2002 Elsevier Science Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 37 U4 - Behavioral Sciences;Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0091-3057 UR - ISI:000176945900007 L2 - maternal behavior;affiliation;mother-infant interactions;rats;monkeys;development;PITUITARY-ADRENAL AXIS; MATERNAL-DEPRIVATION; RHESUS-MONKEYS; ADULT-RATS; LACTATING RATS; SOCIAL ATTACHMENT; TACTILE STIMULATION; PREPULSE INHIBITION; REARING CONDITIONS; VENTRAL STRIATUM SO - Pharmacology Biochemistry and Behavior 2002 ;73(1):61-75 5404 UI - 10417 AU - Fleming WH AU - Hernandez-Hernandez D AD - Brown Univ, Div Appl Math, Providence, RI 02912, USACtr Invest Matemat, Guanajuato 36000, MexicoFleming, WH, Brown Univ, Div Appl Math, Providence, RI 02912, USA TI - An optimal consumption-investment problem for factor-dependent models AB - An extension of the classical Merton model with consumption is considered when the diffusion coefficient of the asset prices depends on some economic factor. The objective is to maximize total expected discounted HARA utility of consumption. Optimal controls are provided as well as a characterization of the value function in terms of the associated Hamilton-Jacobi-Bellman equation MH - Mexico|Guanajuato MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Computer Science, Information Systems U5 - S;Article AV - English IS - 0170-8643 UR - ISI:000177472100009 L2 - stochastic volatility;portfolio optimization;factor modeling;mean reverting;RISK-SENSITIVE CONTROL; MANAGEMENT SO - Stochastic Theory and Control, Proceedings 2002 ;280():121-130 5405 UI - 10004 AU - Flier WG AU - Grunwald NJ AU - Kroon LPNM AU - van den Bosch TBM AU - Garay-Serrano E AU - Lozoya-Saldana H AU - Bonants PJM AU - Turkensteen LJ AD - Plant Res Int, NL-6700 AA Wageningen, NetherlandsCornell Univ, CEEM, PICTIPAPA, Potato Late Blight Project,Dept Plant Pathol, Ithaca, NY 14853, USAUniv Autonoma Chapingo, Dept Fitotech, Chapingo 56230, Edo De Mexico, MexicoFlier, WG, Plant Res Int, POB 16, NL-6700 AA Wageningen, Netherlands TI - Phytophthora ipomoeae sp nov., a new homothallic species causing leaf blight on Ipomoea longipedunculata in the Toluca Valley of central Mexico AB - A Phytophthora species was found on blighted foliage of Ipomoea longipedunculata, a morning glory native to the highlands of central Mexico. Based on host range, morphology, allozymes, mitochondrial DNA haplotype and rDNA sequences it is concluded that a new Phytophthora species, P. ipomoeae sp. nov., is the causal agent of leaf blight disease on I. longipedunculata MH - Mexico|Estado De Mexico MH - Netherlands MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 8 U4 - Mycology U5 - J;Article AV - English IS - 0953-7562 UR - ISI:000178737300013 L2 - POPULATION-STRUCTURE; INFESTANS; PHYLOGENY; POTATO SO - Mycological Research 2002 ;106():848-856 5406 UI - 11728 AU - Fliess M AU - Marquez R AU - Delaleau E AU - Sira-Ramirez H AD - Ecole Normale Super, Ctr Math Applicat, F-94235 Cachan, FranceCtr Univ Paris Sud, Signaux & Syst Lab, CNRS, Supelec, F-91192 Gif Sur Yvette, FranceIPN, CINVESTAV, Dept Ingn Elect, Mexico City 14740, DF, MexicoFliess, M, Ecole Normale Super, Ctr Math Applicat, 61 Ave President Wilson, F-94235 Cachan, France TI - Generalized proportional-integral controllers AB - For constant linear systems we are introducing integral reconstructors and generalized proportional-integral controllers, which permit to bypass the derivative term in the classic PID controllers and more generally the usual asymptotic observers. Our approach, which is mainly of algebraic flavour, is based on the module-theoretic framework for linear systems and on operational calculus in Mikusinski's setting. Several examples are discussed MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - French IS - 1262-3377 UR - ISI:000174069100001 L2 - PID controllers;generalized proportional-integral controllers;integral reconstructors;modules;operational calculus;localization;NONLINEAR-SYSTEMS; LINEAR-SYSTEMS; FLATNESS; EXAMPLES SO - Esaim-Control Optimisation and Calculus of Variations 2002 ;7(2):23-41 5407 UI - 9676 AU - Floran B AU - Barajas C AU - Floran L AU - Erlij D AU - Aceves J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoSuny Downstate Med Ctr, Dept Physiol, Brooklyn, NY 11203, USAFloran, B, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Adenosine Al receptors control dopamine Dl-dependent [H-3]GABA release in slices of substantia nigra pars reticulata and motor behavior in the rat AB - Abnormalities in dopaminergic control of basal ganglia function play a key role in Parkinson's disease. Adenosine appears to modulate the dopaminergic control in striatum, where an inhibitory interaction between adenosine and dopamine receptors has been demonstrated. However the interaction has not been established in substantia nigra pars reticulata (SNr) where density of both receptors is high. Here we have explored the interaction between A1/D1 receptors in SNr. In SNr slices, SKF 38393, a selective D1 receptor agonist, produced a stimulation of depolarization-induced Ca2+-dependent [H-3]GABA release that was inhibited by adenosine. The adenosine inhibition was abolished by 8-cyclopentyl-1,3-dipropylxanthine (DPCPX), a selective adenosine A1 receptor antagonist. DPCPX per se enhanced GABA release, indicating inhibition of the release by endogenous adenosine. When D1 receptors were blocked with SCH 23390 or the slices were depleted of dopamine, the effect of DPCPX was suppressed, showing that activation of dopamine receptors was necessary for the adenosine inhibition. In normal slices, 2-chloro-eta(6)-cyclopentyladenosine (CCPA), a selective A1 agonist, inhibited GABA release, but the inhibition was prevented by the blockade of D1 receptors with SCH 23390. Superperfusion with 8-bromo-cAMP produced a stimulation of GABA release that was not blocked by CCPA: this finding indicates that the blockade of D1 effects caused by activation of A1 receptors is specific. To see if these actions on GABA release were correlated with changes in motor behavior we studied the effect of unilateral intranigral injections of modifiers of adenosine A1 and dopamine D1 receptors in rats challenged with systemic methamphetamine. Both the A1 agonist CCPA and the D1 antagonist SCH 23390 produced ipsilateral turning whereas the A1 antagonist DPCPX caused contralateral turning. These motor effects are consistent with the findings on GABA release. The results indicate the presence of an inhibitory A1/D1 receptor interaction in SNr. The inhibition exerted by A1 adenosine receptors on GABAergic striatonigral transmission would be due exclusively to blockade of the facilitation resulting from activation of D1 dopamine receptors. The data permit to better understand the action of adenosine antagonists in the treatment of Parkinson's disease. (C) 2002 IBRO. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000179524100010 L2 - adenosine antagonists;basal ganglia;cAMP;GABA transmission;Parkinson's disease;turning behavior;INTERSTITIAL FLUID ADENOSINE; ENDOGENOUS GABA RELEASE; D-1 RECEPTORS; BASAL GANGLIA; ROTATIONAL BEHAVIOR; PARKINSONS-DISEASE; CAUDATE-PUTAMEN; A(1); MODULATION; STIMULATION SO - Neuroscience 2002 ;115(3):743-751 5408 UI - 11258 AU - Flores S AU - Gosset G AU - Flores N AU - de Graaf AA AU - Bolivar F AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62250, Morelos, MexicoKFA Julich GmbH, Forschungszentrum, Inst Biotechnol 1, D-52425 Julich, GermanyFlores, S, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Apdo Postal 510, Cuernavaca 62250, Morelos, Mexico TI - Analysis of carbon metabolism in Escherichia coli strains with an inactive phosphotransferase system by C-13 labeling and NMR spectroscopy AB - We have developed Escherichia coli strains that internalize glucose utilizing the GaIP permease instead of the phosphoenolpyruvate:carbohydrate phosphotransferase system. It has been demonstrated that a strain with these modifications (PTS(-)Glc(+)) can direct more carbon flux into the aromatic pathway than the wild-type parental strain (N. Flores et al., 1996, Nat. Biotechnol. 14, 620-623; G. Gosset et al., 1996, J. Ind. Microbiol. 17, 47-52; J. L. Baez et al., 200 1, Biotechnol. Bioeng. 73, 530-535). In this study, we have determined and compared the carbon fluxes of a wild-type strain (JM101), a PTS(-)Glc(-) strain, and two isogenic PTS(-)Glc(+) derivatives named PB12 and PB13 by combining genetic, biochemical, and NMR approaches. It was determined that in these strains a functional glk gene in the chromosome is required for rapid glucose consumption; furthermore, glucokinase-specific activities were higher than in the wild-type strain. C-13 labeling and NMR analysis allowed the determination of differences in vivo which include higher glycolytic fluxes of 93.1 and 89.2% compared with the 76.6% obtained for the wild-type E. coli. In PB12 and PB13 we found a flux through the malic enzymes of 4 and 10%, respectively, compared to zero in the wild-type strain. While flux through the Pck enzyme was absent in PB12 and PB13, in the wild type it was 7.7%. Finally, it was found that in the JM101 and PB12 strains both the oxidative and the nonoxidative branches of the pentose phosphate pathway contributed to ribose 5-phosphate synthesis, whereas in PB13 this pentose was synthesized almost exclusively through the oxidative branch. The determined carbon fluxes correlate with biochemical and genetic characterizations. (C) 2002 Elsevier Science (USA) MH - Germany MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 36 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1096-7176 UR - ISI:000175318600003 L2 - NMR;glucose transport;phosphoenolpyruvate;central carbon metabolism;metabolic engineering;BIDIRECTIONAL REACTION STEPS; FLUX RATIO ANALYSIS; NETWORKS; CLONING; ACID; DEHYDROGENASES; BIOSYNTHESIS; GLUCOSE; BINDING; ENZYMES SO - Metabolic Engineering 2002 ;4(2):124-137 5409 UI - 11208 AU - Foeldvari I AU - Burgos-Vargas R AU - Thon A AU - Tuerck D AD - Allgemeinen Krankenhaus Eilbek, Pediat Rheumatol Klin, D-22081 Hamburg, GermanyHosp Gen Mexico City, Dept Rheumatol, Mexico City, DF, MexicoUniv Childrens Hosp, Dept Pediat Rheumatol, Hannover, GermanyBoehringer Ingelheim Pharma KG, Dept Pharmacokinet & Drug Metab, Biberach, GermanyFoeldvari, I, Allgemeinen Krankenhaus Eilbek, Pediat Rheumatol Klin, Friedrichsberger Str 60, D-22081 Hamburg, Germany TI - High response rate in the phase I/II study of meloxicam in juvenile rheumatoid arthritis AB - Objective. Use of meloxicam as a selective COX-2 inhibitor for treatment of adult rheumatic diseases decreases the frequency of gastrointestinal (GI) side effects in comparison with nonselective COX inhibitors. Up to 50% of children with juvenile rheumatoid arthritis (JRA) also develop GI side effects through nonselective COX inhibitors. In this 12 week Phase I/II studs, with an additional open extension lasting up to 52 weeks, the safety, efficacy, and pharmacokinetics of meloxicam in JRA were investigated. Methods. Meloxicam suspension 0.25 mg/kg once daily was given to 36 patients with JRA who required a nonsteroidal anti inflammatory drug. Safety evaluation and periodic measurement of efficacy were carried out using the Pediatric Rheumatology International Trials Organisation (PRINTO) criteria. Eighteen patients underwent pharmacokinetic (PK) evaluation. Results. Thirty-one patients completed the study. Four were dropped due to administrative reasons. One patient, who found the drug ineffective, discontinued participation. A response was seen according to PRINTO outcome criteria in 44% of the patients at Week 4, 621% at Week 12, and 74% at Week 52. Drug related adverse events were observed in 5 patients. PK evaluation showed that the maximum plasma concentration C-max of -34% and AUC(0-infinity) of -28% tended to be lower in younger children (2-6 years) versus older children. Plasma elimination half-life (13 h) was similar in all patients. Conclusion. Meloxicam suspension 0.25 mg/kg once daily seems to be effective and safe for treating active JRA over a period of 52 weeks MH - Germany MH - Mexico|Distrito Federal PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 10 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000175430100035 L2 - COX-2 inhibitor;COX-1 inhibitor;children;nonsteroidal antunflammatory drug;NONSTEROIDAL ANTIINFLAMMATORY DRUGS; DOUBLE-BLIND; HEALTHY-VOLUNTEERS; GASTROINTESTINAL TOLERABILITY; DIFFERENTIAL INHIBITION; DICLOFENAC SODIUM; 15 MG; OSTEOARTHRITIS; EFFICACY; PIROXICAM SO - Journal of Rheumatology 2002 ;29(5):1079-1083 5410 UI - 11441 AU - Foldvari I AU - Beregi E AU - Munoz FA AU - Sosa R AU - Horvath V AD - Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1121 Budapest, HungaryUniv Autonoma Metropolitana Iztapalapa, Dept Phys, Mexico City 09340, DF, MexicoFoldvari, I, Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Konkoly Thege U 29-23, H-1121 Budapest, Hungary TI - The energy levels of Er3+ ion in yttrium aluminum borate (YAB) single crystals AB - Er-doped yttrium aluminum borate (YAB) is a potential self-frequency-doubling laser crystal. The basic spectroscopic data for the Er3+ in flux-grown YAB crystals are presented. 12 transitions from the I-4(15/2) ground state and their Stark components are summarized and analyzed in the 10 300 K temperature range. (C) 2002 Elsevier Science B.V. All rights reserved MH - Hungary MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000174763300001 L2 - yttrium aluminum borate;YAB;Er-dopant;absorption spectra;LASER CRYSTAL; GROWTH; ND3+ SO - Optical Materials 2002 ;19(2):241-244 5411 UI - 8157 AU - Font J AU - Ramos-Casals M AU - Gil V AU - Claver G AU - de-la-Red G AU - Jimenez S AU - Garcia-Carrasco M AU - Cervera R AU - Ingelmo M AD - BUAP, Puebla, MexicoHosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, Spain TI - Muscular involvement in 600 patients with systemic lupus erythematosus MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421801191 SO - Arthritis and Rheumatism 2002 ;46(9):S442-S442 5412 UI - 9967 AU - Font J AU - Rousseau S AU - Shirasago B AU - Garcia-Gorriz E AU - Haney RL AD - CSIC, Inst Ciencies Mar, E-08003 Barcelona, SpainUSN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943, USAIPN, CICIMAR, Interdisciplinary Ctr Marine Sci, La Paz, Baja Calif Sur, MexicoFont, J, CSIC, Inst Ciencies Mar, Passeig Maritim 37-49, E-08003 Barcelona, Spain TI - Mesoscale variability in the Alboran Sea: Synthetic aperture radar imaging of frontal eddies AB - [1] In autumn 1992 the entire Alboran Sea (western Mediterranean) was sampled by the Spanish R/V Garcia del Cid. The incoming jet of Atlantic water, its associated meandering front, and the two big anticyclonic gyres were described from conductivity-temperature-depth (CTD) and acoustic Doppler current profiler (ADCP) data. Smaller-scale eddies were also observed. Additionally, 36 ERS-1 synthetic aperture radar (SAR) scenes were obtained from mid-September to mid-October. The SAR images capture these features when wind conditions are suitable. The current shear is mainly depicted as narrow lines of low backscatter because of the damping of waves by natural surface films. These lines delineate the northern border of both gyres and the beginning of the alongslope Algerian current at the eastern limit of the Alboran Sea. ADCP observations confirm that lines on SAR imagery follow the direction of the surface currents. The two gyres present high backscatter values in their center, while their frontal boundaries appear modulated by the variation of the marine atmospheric boundary layer stratification due to the surface thermal front. SAR has observed small spiral eddies that were not evidenced by the almost contemporaneous but too coarse CTD in situ sampling. Good spatial correspondence between radar-detected and in situ-measured structures occurs when comparing SAR images to the surface dynamic topography, rather than strictly surface water characteristics MH - Mexico|Baja California Sur MH - Spain MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000178993500005 L2 - ocean mesoscale;SAR;Alboran Sea;western Mediterranean Sea;surface layer circulation;SYNOPTIC HYDROGRAPHIC OBSERVATIONS; WESTERN MEDITERRANEAN SEA; ANTICYCLONIC GYRES; SAMPLING STRATEGY; OCEAN SURFACE; GULF-STREAM; CIRCULATION; SAR; IMAGERY; SPIRALS SO - Journal of Geophysical Research-Oceans 2002 ;107(C6): 5413 UI - 10248 AU - Font J AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Aldea AI AU - Cervera R AU - Ingelmo M AU - Vives J AU - Yague J AD - Univ Barcelona, Sch Med, Hosp Clin,IDIBAPS, Clin Inst Infect & Immunol,Dept Immunol, Barcelona, SpainUniv Barcelona, Sch Med, Hosp Clin,IDIBAPS, System Autoimmune Dis Unit, Barcelona, SpainBenemerita Univ Autonoma Puebla, Sch Med, Dept Rheumatol, Puebla, MexicoFont, J, Hosp Clin Barcelona, Unitat Malalties Autoimmunes Sistem, C Villarroel 170, E-08036 Barcelona, Spain TI - The role of interleukin-10 promoter polymorphisms in the clinical expression of primary Sjogren's syndrome AB - Objective. To analyse the role of polymorphisms of the interleukin-10 promoter region in the epidemiologic, clinical and immunologic characteristics of patients with primary Sjogren's syndrome (SS). Methods. Sixty-three consecutive patients (59 women and four men; mean age 57 yr; range 20-83 yr) were studied in our Unit. All patients fulfilled four or more of the modified diagnostic criteria for SS proposed by the European Community Study Group in 1996. As controls, 150 healthy volunteers were recruited from the medical and laboratory staff working in our hospital. All the samples from patients and controls were analysed by PCR amplification and direct sequencing. Results. The frequency of the interleukin-10 (IL-10) GCC haplotype was higher (0.48 vs 0.34, P=0.006) and the frequency of the IL-10 ACC haplotype lower (0.25 vs 0.39, P=0.005) in patients with primary SS compared with healthy controls. In the genotype analysis, the frequency of the GCC/ATA genotype was higher (29 vs 11%, P=0.001) and that of the ACC/ACC genotype lower (3 vs 12%, P=0.044) in patients with primary SS compared with healthy controls. GCC-carriers showed an earlier onset of the disease (48.06+/-14.98 yr vs 57.53+/-14.20 yr, P=0.034). The existence of systemic involvement (defined by cutaneous vasculitis, peripheral neuropathy, renal and/or pulmonary involvement) was more frequent in carriers of the GCC haplotype, although the difference did not reach statistical significance (40 vs 27%, P=0.278). No significant differences in the haematologic (hypergammaglobulinaemia, elevated ESR) and immunologic (ANA, RF, anti-Ro/SS-A and anti-La/SS-B antibodies) parameters were observed in carriers of the GCC haplotype. Conclusion. We describe an abnormal distribution of IL-10 promoter haplotypes in patients with primary SS compared with healthy controls. This consists of a predominance of the GCC haplotype, mainly related to a higher frequency of the heterozygote haplotype GCC/ATA. The presence of the GCC haplotype does not originate a different immunologic pattern but leads to an earlier onset of primary SS MH - Mexico|Puebla MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 27 U4 - Rheumatology U5 - J;Article AV - English IS - 1462-0324 UR - ISI:000178001800011 L2 - interleukin-10;IL-10 polymorphisms;primary Sjogren's syndrome;SYSTEMIC-LUPUS-ERYTHEMATOSUS; IMMUNOLOGICAL CHARACTERISTICS; RHEUMATOID-ARTHRITIS; GENE PROMOTER; IL-10 LOCUS; PREVALENCE; SERIES; ASSOCIATION; DISEASE; ANTIBODIES SO - Rheumatology 2002 ;41(9):1025-1030 5414 UI - 9636 AU - Fordham JLA AU - Vranesevic N AU - Carraminana A AU - Michel R AU - Much R AU - Wehinger P AU - Wyckoff S AD - Univ Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandAstron Observ Belgrade, YU-11160 Belgrade, YugoslaviaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoEuropean Space Agcy, Estec, Sci Operat & Data Syst Div, NL-2201 AZ Noordwijk, NetherlandsUniv Arizona, Steward Observ, Tucson, AZ 85721, USAArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAFordham, JLA, Univ Coll London, Dept Phys & Astron, Gower St, London WC1E 6BT, England TI - Phase-resolved spectroscopic imaging of the crab pulsar AB - High time resolution spectroscopic imaging of the Crab pulsar across the optical wave band has been undertaken utilizing the 4 m Mayall telescope at Kitt Peak National Observatory. The 33.51 ms period of the pulsar was split into 723.7 time slices of 46.3 mus and a spectrum within each slice acquired. These data have allowed analysis of both the light curve as a function of wavelength and the spectrum as a function of phase position. Wavelength-dependent changes in phase position for both emission peaks have been found, and these appear to be uncorrelated. Related to these changes are phase position dependent variations in the spectral index, and these have been measured, the shapes being in agreement with previously published data. Also related are energy-dependent changes in the FWHMs. In addition, we find, in support of previously published data, that the fluence of Peak 2 relative to Peak 1 decreases with increasing wavelength. These results then challenge the validity of currently existing models for pulsar emission MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Puebla MH - Netherlands MH - USA MH - Yugoslavia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179681500035 L2 - pulsars : individual (PSR B0531+21);radiation mechanisms : nonthermal;stars : neutron;RAPIDLY SPINNING PULSARS; TIME-RESOLUTION; GAMMA-RAY; ENERGETIC RADIATION; NEBULA PULSAR; EMISSION; ULTRAVIOLET; DETECTORS; MODEL; HST SO - Astrophysical Journal 2002 ;581(1):485-494 5415 UI - 11583 AU - Fouke BW AU - Zerkle AL AU - Alvarez W AU - Pope KO AU - Ocampo AC AU - Wachtman RJ AU - Nishimura JMG AU - Claeys P AU - Fischer AG AD - Univ Illinois, Dept Geol, Urbana, IL 61801, USAUniv Calif Berkeley, Dept Geol & Geophys, Berkeley, CA 94720, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USANASA Headquarters, Washington, DC 20546, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoFree Univ Brussels, Dept Geol, B-1050 Brussels, BelgiumUniv So Calif, Dept Earth Sci, Los Angeles, CA 90089, USAFouke, BW, Univ Illinois, Dept Geol, 245 Nat Hist Bldg,1301 W Green St, Urbana, IL 61801 USA TI - Cathodoluminescence petrography and isotope geochemistry of KT impact ejecta deposited 360 km from the Chicxulub crater, at Albion Island, Belize AB - The depositional and diagenetic history of Cretaceous-Tertiary (KT) impact ejecta deposited 360 km from the Chicxulub crater, at Albion Island, Belize, has been investigated using integrated cathodoluminescence and isotopic analyses. A quarry exposes 26 m of Upper Cretaceous Barton Greek Formation dolomitized marine limestone overlain by 16 m of dolomitized Albion Formation impact ejecta. The Albion Formation consists of a lower fine-grained approximate to1-m-thick spheroid bed and an upper 15-m-thick coarse conglomeratic diamictite bed. A 14-event paragenetic sequence has been documented and used as a temporal framework to interpret chemostratigraphic trends in bulk rock delta(18)O, delta(13)C and Sr-87/Sr-86. The uppermost surface of the Barton Creek Formation was subaerially exposed before the KT impact, as indicated by a brecciated palaeosol that caps upsection decreases in delta(13)C and delta(18)O. Small 1-cm-diameter spheroids in the spheroid bed exhibit vermicular crystalline textures but lack the concentric zonations common to accretionary lapilli. These spheroids are hypothesized originally to have been impact glass or reactive Ca and Mg oxide dusts that adhered to water vapour particles condensing from the cooling impact vapour cloud. The spheroids were dolomitized soon after deposition. The earliest dolomitization in the matrix sediments of the Albion Formation was also post-depositional, replacing clays formed by devitrification of impact glass. Dolomite and clay Sr-87/Sr-86 exhibit a distinct symmetrical distribution in the spheroid bed ranging from 0.707745 to 0.707872. Although unproven, this may represent primary changes in the chemical composition of the impact glass. The limestone clasts in the diamictite bed were dolomitized before the KT impact and exhibit upsection decreases in bulk rock Sr-87/Sr-86. This suggests that the clasts were excavated from strata equivalent in age or older than the Barton Creek Formation at locations closer to, or in, the Chicxulub crater MH - Belgium MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Geology U5 - J;Article AV - English IS - 0037-0746 UR - ISI:000174464900008 L2 - carbonates;cathodoluminescence;Chicxulub;Cretaceous-Tertiary (KT) boundary event;ejecta;isotopes;CRETACEOUS-TERTIARY BOUNDARY; ACCRETIONARY LAPILLI; YUCATAN PENINSULA; ASTEROID IMPACT; MELT ROCK; MEXICO; STRATIGRAPHY; CONSTRAINTS; SR-87/SR-86; GLASS SO - Sedimentology 2002 ;49(1):117-138 5416 UI - 11912 AU - Fox-Machado L AU - Alvarez M AU - Michel E AU - Li ZP AU - Hernandez FP AU - Chevreton M AU - Barban C AU - Belmonte JA AU - Dolez N AU - Fernandez A AU - Guo JP AU - Haywood M AU - Liu YY AU - Pau S AU - Planas H AU - Servan B AD - Inst Astrofis Canarias, La Laguna 38205, SpainUNAM, Inst Astron, Ensenada, Baja California, MexicoObserv Paris, DASGAL, UMR 8633, F-92195 Meudon, FranceChinese Acad Sci, Beijing Observ, Beijing, Peoples R ChinaUniv La Laguna, Dept Astrofis, Tenerife, SpainObserv Paris, DAEC, UMR 8632, F-92195 Meudon, FranceObserv Midi Pyrenees, F-31400 Toulouse, FranceFox-Machado, L, Inst Astrofis Canarias, La Laguna 38205, Spain TI - Pulsational frequencies in the delta Scuti stars V624 Tauri and HD 23194 - Results of the STEPHI X campaign on the Pleiades cluster AB - The results of the tenth multi-site campaign of the STEPHI network are reported. The delta Scuti stars V624 Tau (HD 23156) and HD 23194, belonging to the Pleiades cluster, were observed photometrically for 34 days on three continents during 1999 November-December. An overall run of 343 hours of data was collected. Seven frequencies for V624 Tau and two frequencies for HD 23194 have been found above a 99% confidence level. These results greatly improve those found in previous studies with much less data. A preliminary comparison of observed and theoretical frequencies suggests that both stars may oscillate with radial and non-radial p modes of radial orders typical among delta Scuti stars MH - France MH - Mexico|Baja California MH - Peoples R China MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000173561700014 L2 - stars : oscillations;stars : variables : delta Sct;stars : individual : HD 23156, HD 23194;A-TYPE STARS; PHOTOMETRY CAMPAIGN; PRAESEPE CLUSTER; ABUNDANCES; DISTANCE; NETWORK; CANCRI SO - Astronomy & Astrophysics 2002 ;382(2):556-562 5417 UI - 11204 AU - Fox MJ AU - Efstathiou A AU - Rowan-Robinson M AU - Dunlop JS AU - Scott S AU - Serjeant S AU - Mann RG AU - Oliver S AU - Ivison RJ AU - Blain A AU - Almaini O AU - Hughes D AU - Willott CJ AU - Longair M AU - Lawrence A AU - Peacock JA AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandRoyal Observ, UK ATC, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandINAOE, Puebla 72000, MexicoUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandUniv Kent, Sch Phys Sci, Unit Space Sci & Astrophys, Canterbury CT2 7NZ, Kent, EnglandUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandCALTECH, Dept Astron, Pasadena, CA 91125, USAFox, MJ, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, Prince Consort Rd, London SW7 2BW, England TI - The SCUBA 8-mJy survey - II. Multiwavelength analysis of bright submillimetre sources AB - We present the results of a multiwavelength study of the 19 most significant submillimetre (submm) sources detected in the SCUBA 8-mJy survey. As described in Scott et al., this survey covers similar or equal to 260 arcmin(2) using the submillimetre camera SCUBA, to a limiting source detection limit S-850 (mum) similar or equal to 8 mJy. One advantage of this relatively bright flux-density limit is that accurate astrometric positions are potentially achievable for every source using existing radio and/or millimetre-wave interferometers. However, an associated advantage is that spectral energy distribution (SED) based redshift constraints should be more powerful than in fainter submm surveys. Here we therefore exploit the parallel SCUBA 450-mum data, in combination with existing radio and Infrared Space Observatory (ISO) data at longer and shorter wavelengths to set constraints on the redshift of each source. We also analyse new and existing optical and near-infrared imaging of our SCUBA survey fields to select potential identifications consistent with these constraints. Our derived SED-based redshift constraints, and the lack of statistically significant associations with even moderately bright galaxies allow us to conclude that all 19 sources lie at z > 1, and at least half of them apparently lie at z > 2 MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 45 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000175270700006 L2 - galaxies : distances and redshifts;galaxies : evolution;galaxies : starburst;cosmology : observations;HUBBLE DEEP FIELD; X-RAY SOURCES; STAR-FORMATION HISTORY; AREA ISO SURVEY; HIGH-REDSHIFT; SOURCE COUNTS; ULTRALUMINOUS GALAXY; STARBURST GALAXIES; LOCKMAN FIELD; MOLECULAR GAS SO - Monthly Notices of the Royal Astronomical Society 2002 ;331(4):839-852 5418 UI - 10440 AU - Fracheboud Y AU - Ribaut JM AU - Vargas M AU - Messmer R AU - Stamp P AD - Swiss Fed Inst Technol, Inst Plant Sci, CH-8092 Zurich, SwitzerlandCIMMYT, Mexico City 06600, DF, MexicoFracheboud, Y, Swiss Fed Inst Technol, Inst Plant Sci, Univ Str 2, CH-8092 Zurich, Switzerland TI - Identification of quantitative trait loci for cold-tolerance of photosynthesis in maize (Zea mays L.) AB - The effects of low growth temperature (15 degreesC) on the photosynthetic apparatus of maize were investigated in a set of 233 recombinant inbred lines by means of chlorophyll fluorescence, gas exchange measurements and analysis of photosynthetic pigments. A quantitative trait loci (QTL) analysis of five traits related to the functioning of the photosynthetic apparatus revealed a total of eight genomic regions that were significantly involved in the expression of the target traits. Four of these QTLs, located on chromosomes 1 (around 146 cM), 2 (around 138 cM), 3 (around 70 cM), and 9 (around 62 cM), were identified across several traits and the phenotypic correlation observed among those traits confirmed at the genetic level. The two QTLs on chromosomes 1 and 9 were also expressed in leaves developed at near-optimal temperature (25 degreesC) whilst the two QTLs on chromosomes 2 and 3 were specific to leaves developed at sub-optimal temperature. A QTL analysis conducted on traits related to the pigment composition of the leaves developed at 15 degreesC detected the QTL on chromosome 3 around 70 cM in 7 of the 11 traits analysed. This QTL accounted for up to 28% of the phenotypic variance of the quantum yield of electron transport at PSII in the fourth leaf after about 3 weeks at a sub-optimal temperature. The results presented here suggest that key gene(s) involved in the development of functional chloroplasts of maize at low temperature should be located on chromosome 3, close to the centromere MH - Mexico|Distrito Federal MH - Switzerland PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000177505100017 L2 - chlorophyll fluorescence;cold-tolerance;maize;photosynthesis;pigment composition;QTL;LOW GROWTH TEMPERATURE; CHLOROPHYLL FLUORESCENCE; CO2 ASSIMILATION; TROPICAL MAIZE; PIGMENT COMPOSITION; ELECTRON-TRANSPORT; DROUGHT CONDITIONS; QUANTUM YIELD; LEAVES; SENSITIVITY SO - Journal of Experimental Botany 2002 ;53(376):1967-1977 5419 UI - 10631 AU - Franco-Gordo C AU - Godinez-Dominguez E AU - Suarez-Morales E AD - Univ Guadalajara, Ctr Ecol Costera, San Patricio Melaque 48980, Jalisco, MexicoColegio Frontera Sur Ecosur, Chetumal 77000, Quintana Roo, MexicoFranco-Gordo, C, Univ Coruna, Dept Biol Anim Biol Vegetal & Ecol, Campus Zapateira S-N, La Coruna 15071, Spain TI - Larval fish assemblages in waters off the central Pacific coast of Mexico AB - Spatial and seasonal variation of the ichthyoplankton assemblages was analysed using monthly samples collected during a 1 year cycle off the central Pacific coast of Mexico. Zooplankton samples were collected at 12 stations during 11 months, from December 1995 to December 1996. The analysis of coastal oceanographic conditions revealed two main seasonal patterns, one related to the California Current influence and the other a tropical one. A temporal recomposition of the ichthyoplankton assemblages was found to be related to each oceanographic pattern. During the California Current period (January-May) the larval fish assemblage was respresented mainly by Auxis sp., Bentosema panamense, Cetengraulis mysticetus, Opistonema sp., Symphurus elongatus, Gobionellus sp., Dormitator latifrons and Bregmaceros bathymaster. The tropical season assemblage (July, October and November) was represented by Harengula thrissina, Euthynnus lineatus, Vinciguerria lucetia, Syacium ovale, and representatives of the Eleotridae and Pomacentridae. An inshore-offshore gradient was observed during the tropical oceanographic periods, with a thermic stratification of the water column over the shelf. Conversely, during the California Current period, with coastal advective processes, the assemblages of fish larvae were more homogeneous. Although a mixed, richer faunistic composition was expected in this transitional area, the overall biogeographic affinity of the surveyed community remained stable even in contrasting conditions MH - Mexico|Jalisco MH - Mexico|Quintana Roo MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0142-7873 UR - ISI:000177061100004 L2 - DIEL VERTICAL-DISTRIBUTION; ICHTHYOPLANKTON ASSEMBLAGES; DISTRIBUTION PATTERNS; SOUTHERN-CALIFORNIA; SYDNEY SHELF; VARIABILITY; ZONE; HYDROGRAPHY; COMMUNITY; TAIWAN SO - Journal of Plankton Research 2002 ;24(8):775-784 5420 UI - 11415 AU - Franco-Vizcaino E AU - Escoto-Rodriguez M AU - Sosa-Ramirez J AU - Minnich RA AD - Calif State Univ Monteray Bay, Inst Earth Syst Sci & Policy, Seaside, CA 93955, USACtr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoUniv Autonoma Aguascalientes, Ctr Ciencias Agropecuarias, Aguascalientes, MexicoUniv Calif Riverside, Dept Earth Sci, Riverside, CA 92521, USAFranco-Vizcaino, E, Calif State Univ Monteray Bay, Inst Earth Syst Sci & Policy, 100 Campus Ctr, Seaside, CA 93955 USA TI - Water balance at the southern limit of the Californian mixed-conifer forest and implications for extreme-deficit watersheds AB - This study estimates the soil water balance at forest/chaparral, upper forest, and wet-meadow sites in the Sierra San Pedro Martir (SSPM), Baja California, Mexico, and compares the results to previously published data for similar sites in neighboring California, USA. Changes in soil water storage (0-80 cm) were determined by using a neutron probe, deep drainage (> 80 cm) was measured in minilysimeters, and runoff was estimated in 1 m 2 plots. Average annual precipitation was 714+/-226, 674+/-137, and 551+/-112 mm at the lower forest, upper forest, and wet-meadow sites, respectively. Evapotranspiration (ET) was 390+/-122, 478+/-87, and 446+/-122 mm, or 55%, 71% and 81% of precipitation. The relationship between average precipitation and average ET for SSPM was similar to published long-term ET data for extreme-deficit watersheds in southern California. Regression analyses of streamflow and ET data in review studies revealed that, as water deficit increases, the relationship between precipitation and ET becomes increasingly stronger, while that between precipitation and streamflow becomes concomitantly weaker. The slope of the regression line gives the proportion of precipitation lost to streamflow or ET, while the intercept indicates the amount of soil water recharge required annually before streamflow can occur. Available data from long-term studies in extreme-deficit watersheds revealed a near-zero intercept, and imply that 69% of precipitation is evapotranspired from the surface soil, Also, 15% is apparently transpired by deep roots extracting water below the solum, and the remaining 16% goes to streamflow MH - USA MH - Mexico|Aguascalientes MH - Mexico|Baja California PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Soil Science U5 - J;Article AV - English IS - 1532-4982 UR - ISI:000175048600002 L2 - Baja California;chaparral;evapotranspiration;Mediterranean climate;soil moisture;streamflow;water budget;VEGETATION; EVAPOTRANSPIRATION; CLIMATE SO - Arid Land Research and Management 2002 ;16(2):133-147 5421 UI - 10276 AU - Franco J AU - Crossa J AD - CIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoUniv Republ Oriental Uruguay, Fac Agron, Montevideo, UruguayCrossa, J, CIMMYT, Biometr & Stat Unit, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - The modified location model for classifying genetic resources: I. Association between categorical and continuous variables AB - When evaluating genetic resources, data on continuous and categorical attributes of accessions is collected. The Ward method and the modified location model (MLM) (Ward-MLM strategy) classify genetic resources using a mixture of categorical and continuous variables and combine all the categorical variables into one multinomial variable (11) that is assumed to be statistically independent from the continuous variables. The main objective of this study was to examine the robustness of the MLM for recovering underlying true subpopulations when independence between variable Wand the continuous variables does not hold. In addition, several scenarios, based on different degrees of overlap of the continuous and discrete variables in simulated data sets, were generated. Results showed that when the subpopulations were well-differentiated, the Ward-MLM strategy effectively predicted the true number of subpopulations and fully recovered their structure, regardless of the level of dependence between the W variable and the vector of continuous variables. When the subpopulations showed unclear boundaries and a high degree of overlap in the W variable and in the continuous variables, the Ward-MLM strategy predicted a different number of subpopulations but fully recovered the composition of the subpopulations. In this case, new groups are formed that show, a balanced and consistent structure in their composition as compared with the subpopulations. The MLM proved to be a robust model under medium and strong dependence between the variable Wand the vector of continuous variables and under various kinds of overlapping between subpopulations with respect to the continuous and discrete variables MH - Mexico|Distrito Federal MH - Uruguay PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000177928000046 L2 - MIXTURE SO - Crop Science 2002 ;42(5):1719-1726 5422 UI - 10277 AU - Franco J AU - Crossa J AU - Taba S AU - Eberhart SA AD - CIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoCIMMYT, Maize Genet Resources Unit, Mexico City 06600, DF, MexicoUniv Republ Oriental Uruguay, Fac Agron, Montevideo, UruguayUSDA ARS, Natl Seed Storage Lab, Ft Collins, CO 80523, USACrossa, J, CIMMYT, Biometr & Stat Unit, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - The modified location model for classifying genetic resources: II. Unrestricted variance-covariance matrices AB - When evaluating genetic resources and forming core subsets, gene bank accessions are classified into homogeneous and well-separated groups. The modified location model (MLM) is used in the context of a two-stage clustering strategy in which initial groups are first defined using a hierarchical clustering method (such as Ward) and then the MLM is applied to the groups that are formed (Ward-MLM). The MLM allows assuming correlations (between attributes) and variances (of the attributes) among subpopulations (SPs) to be equal (homogeneous, HOM) or different (heterogeneous, HET). The objectives of this study were (i) to compare the effect of assuming homogeneity with the effect of assuming heterogeneity of,,variance-covariance matrices on the classification of two simulated data sets using the Ward-MLM strategy; and (H) to make the same type of comparison using data from maize (Zea mays L.) accessions from nine countries. When simulated ROM data were analyzed with the HOM model and the simulated HET data were analyzed with the HET model, some of the original SPs were represented in the resulting clusters but others changed and formed more separated groups. The HET model always formed the most compact and separated clusters, even for HOM data. Classification of 10 real data sets showed that the HET model produced more compact and well-separated groups than the HOM model. However, only the HOM model identified and grouped a small number of observations with very peculiar attributes. Although the HET model may suffice in most situations, the recommended strategy when classifying genetic resources would be to use both models MH - Mexico|Distrito Federal MH - Uruguay MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000177928000047 L2 - VARIABLES SO - Crop Science 2002 ;42(5):1727-1736 5423 UI - 11177 AU - Franco J AU - Kim J AU - Alfaro EJ AU - Hong SS AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoKorea Astron Observ, Taejon 305348, South KoreaCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainSeoul Natl Univ, Dept Astron, Seoul 151742, South KoreaFranco, J, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264,Cd Univ, Mexico City 04510, DF, Mexico TI - The Parker instability in three dimensions: Corrugations and superclouds along the Carina-Sagittarius arm AB - Here we present three-dimensional MHD models for the Parker instability in a thick magnetized disk, including the presence of a spiral arm. The B field is assumed parallel to the arm, and the model results are applied to the optical segment of the Carina-Sagittarius arm. The characteristic features of the undular and interchange modes are clearly apparent in the simulations. The interchange mode appears first and generates small interstellar structures in the interarm regions, but its development inside the arm is hampered by the acceleration of the spiral wave. In contrast, the undular mode follows its normal evolution inside the spiral wave, creating large gas concentrations distributed along the arm. This results in a clear arm/interarm difference; the instability triggers the formation of large interstellar clouds ( with masses in the range of 10(6)-10(7) M-circle dot) inside the arms but generates only small structures with slight density enhancements in the interarm regions. The resulting clouds are distributed in an antisymmetric way with respect to the midplane, and their masses are similar to those inferred for H I superclouds in our Galaxy. Such a cloud distribution results in an azimuthal corrugation along the arm, and for conditions similar to those of the optical segment of the Carina-Sagittarius arm, it has a wavelength of about 2.4 kpc. This structuring, then, can explain the origin of both H I superclouds and the azimuthal corrugations in spiral arms. In particular, the wavelength of the fastest growing undular mode matches the corrugation length derived with the young stellar groups located in the optical segment of the Carina-Sagittarius arm MH - Mexico|Distrito Federal MH - South Korea MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175527100015 L2 - Galaxy : kinematics and dynamics;Galaxy : structure;ISM : clouds;ISM : magnetic fields;ISM : structure MHD;GALACTIC MAGNETIC-FIELD; H-II REGIONS; STAR-FORMATION; MOLECULAR CLOUD; INNER GALAXY; DISKS; DENSITY; EQUILIBRIUM; EVOLUTION; COMPLEXES SO - Astrophysical Journal 2002 ;570(2):647-655 5424 UI - 11973 AU - Frank A AU - Alonso CE AU - Arias JM AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoUniv Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainFrank, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, AP 70-543,Circuito Exterior,CU, Mexico City 04510, DF, Mexico TI - Search for E(5) symmetry in nuclei: The Ru isotopes AB - We carry out an interacting boson model study of the Ru isotopes using a U(5)-SO(6) transitional Hamiltonian with fixed parameters, where the variation is due only to the change in boson number N. Transitional behavior in Ru-104 is compared with recent predictions of an E(5) critical symmetry, including a modified version with an alternative beta dependence for the T-(E2) operator MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 33 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000173308000010 L2 - INTERACTING-BOSON MODEL; DYNAMICAL SYMMETRIES SO - Physical Review C 2002 ;65(1): 5425 UI - 10321 AU - Frauel Y AU - Javidi B AD - Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269, USAUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicades & Sistemas, Mexico City 01000, DF, MexicoFrauel, Y, Univ Connecticut, Dept Elect & Comp Engn, 260 Glenbrook Rd,U-157, Storrs, CT 06269 USA TI - Digital three-dimensional image correlation by use of computer-reconstructed integral imaging AB - We use integral images of a three-dimensional (3D) scene to estimate the longitudinal depth of multiple objects present in the scene. With this information, we digitally reconstruct the objects in three dimensions and compute 3D correlations of input objects. We investigate the use of nonlinear techniques for 3D correlations. We present experimental results for 3D reconstruction and correlation of 3D objects. We demonstrate that it is possible to perform 3D segmentation of 3D objects in a scene. We finally present experiments to demonstrate that the 3D correlation is more discriminant than the two-dimensional correlation. (C) 2002 Optical Society of America MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 29 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000177898300005 L2 - 3-DIMENSIONAL OBJECT RECOGNITION; DISPLAY SYSTEM; PHOTOGRAPHY; HOLOGRAPHY SO - Applied Optics 2002 ;41(26):5488-5496 5426 UI - 9717 AU - Frey E AU - Buchy MC AU - Stinnesbeck W AU - Lopez-Oliva JG AD - Staatl Museum Naturkunde, D-76133 Karlsruhe, GermanyUniv Karlsruhe, Inst Geol, D-76128 Karlsruhe, GermanyUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares, MexicoFrey, E, Staatl Museum Naturkunde, Erbprinzenstr 13, D-76133 Karlsruhe, Germany TI - Geosaurus vignaudi n.sp (Crocodyliformes : Thalattosuchia), first evidence of metriorhynchid crocodilians in the Late Jurassic (Tithonian) of central-east Mexico (State of Puebla) AB - Thalattosuchian crocodilians of the genus Geosaurus have mostly been recorded from the Jurassic of Europe. A single species was reported from Argentina. Here we describe a new species of Geosaurus vignaudi from the middle Tithonian La Pimienta Formation of State of Puebla, Mexico. Diagnostic for this species are the extremely low tooth count and a rostroventrally directed process at the rostral terminus of the mandible combined with a pair of horizontally directed rostral teeth. The skull of the holotype shows bite marks that probably caused the death of the animal MH - Germany MH - Mexico|Nuevo Leon PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0008-4077 UR - ISI:000179504600003 SO - Canadian Journal of Earth Sciences 2002 ;39(10):1467-1483 5427 UI - 8541 AU - Friedman R AU - Mostefaoui A AU - Rajsbaum S AU - Raynal M AD - Technion Israel Inst Technol, Dept Comp Sci, IL-32000 Haifa, IsraelUniv Rennes 1, IRISA, F-35042 Rennes, FranceHP Res Lab, Cambridge, MA 02139, USAUNAM, Inst Matem, Mexico City, DF, MexicoFriedman, R, Technion Israel Inst Technol, Dept Comp Sci, IL-32000 Haifa, Israel TI - Distributed agreement and its relation with error-correcting codes AB - The condition based approach identifies sets of input vectors, called conditions, for which it is possible-to design a protocol solving a distributed problem despite, process crashes. This paper investigates three related agreement problems, namely consensus interactive consistency, and k-set aggrement in the context of the condition-based approach. In consensus, processes have to agree on one of the proposed values; in interactive consistency, they have to agree on the vector of proposed values; in k-set agreement, each process decides on one of the proposed values, and at most k different values can be decided on. For both consensus and interactive consistency, a direct correlation between these problems and error correcting codes is established. In particular, crash failures in distributed agreement problems correspond to erasure failures in error correcting codes, and Byzantine and value domain faults correspond to corruption errors. It is also shown that less restrictive codes can be-used to solve k-set agreement, but without a necessity proof, which is still an open problem MH - France MH - Israel MH - Mexico|Distrito Federal MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000182802700005 L2 - asynchronous distributed system;code theory;condition;consensus;crash failure;distributed computing;erroneous value;error-correcting code;fault-tolerance;hamming distance;interactive consistency;UNRELIABLE FAILURE DETECTORS; CONSENSUS; IMPOSSIBILITY; SYSTEMS; FAULTS SO - Distributed Computing, Proceedings 2002 ;2508():63-87 5428 UI - 11427 AU - Froman DP AU - Pizzari T AU - Feltmann AJ AU - Castillo-Juarez H AU - Birkhead TR AD - Oregon State Univ, Dept Anim Sci, Corvallis, OR 97331, USAUniv Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandUniv Autonoma Metropolitana Xochimilco, Mexico City 04960, DF, Mexico TI - Sperm mobility: mechanisms of fertilizing efficiency, genetic variation and phenotypic relationship with male status in the domestic fowl, Gallus gallus domesticus AB - When females are sexually promiscuous, sexual selection continues after insemination through sperm competition and cryptic female choice, and male traits conveying an advantage in competitive fertilization are selected for. Although individual male and ejaculate traits are known to influence paternity in a competitive scenario, multiple mechanisms co-occur and interact to determine paternity. The way in which different traits interact with each other and the mechanisms through which their heritability is maintained despite selection remain unresolved. In the promiscuous fowl, paternity is determined by the number of sperm inseminated into a female, which is mediated by male social dominance, and by the quality of the sperm inseminated, measured as sperm mobility. Here we show that: (i) the number of sperm inseminated determines how many sperm reach the female sperm-storage sites, and that sperm mobility mediates the fertilizing efficiency of inseminated sperm, mainly by determining the rate at which sperm are released from the female storage sites, (ii) like social status, sperm mobility is heritable, and (iii) subdominant males are significantly more likely to have higher sperm mobility than dominant males. This study indicates that although the functions of social status and sperm mobility are highly interdependent, the lack of phenotypic integration of these traits may maintain the variability of male fitness and heritability of fertilizing efficiency MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 42 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000174837200009 L2 - fertilizing efficiency;fowl;maternal inheritance;sperm competition;sperm mobility;social dominance;SOCIAL-DOMINANCE; NAUPHOETA-CINEREA; MITOCHONDRIAL-DNA; SEXUAL SELECTION; MATING-BEHAVIOR; LEK PARADOX; MATE CHOICE; COMPETITION; SPERMATOZOA; BIRDS SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2002 ;269(1491):607-612 5429 UI - 9734 AU - Froufe-Perez LS AU - Garcia-Mochales P AU - Serena PA AU - Mello PA AU - Saenz JJ AD - Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, SpainCSIC, Ctr Nacl Microelect, Inst Microelect Madrid, E-28760 Madrid, SpainCSIC, Inst Ciencia Mat, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoFroufe-Perez, LS, Univ Autonoma Madrid, Dept Fis Mat Condensada, Cantoblanco, E-28049 Madrid, Spain TI - Conductance distributions in quasi-one-dimensional disordered wires AB - A detailed analysis of the distribution of conductances P(g) of quasi-one-dimensional disordered wires in the metal-insulator crossover is presented. P(g) obtained from a Monte Carlo solution of the Dorokhov, Mello, Pereyra, and Kumar (DMPK) scaling equation is in full agreement with "tight-binding" numerical calculations of bulk disordered wires. Perturbation theory is shown to be valid even for mean dimensionless conductances [g] of the order of 1. In the crossover regime [g] less than or similar to 1, P(g) presents a sharp feature at g = 1 which is different from that observed in surface disordered wires MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000179484700036 L2 - RANDOM-MATRIX THEORY; TRANSMISSION EIGENVALUES; QUANTUM-TRANSPORT; WAVE-GUIDES; ANDERSON TRANSITION; LEVEL STATISTICS; MOBILITY EDGE; LOCALIZATION; SURFACE; FLUCTUATIONS SO - Physical Review Letters 2002 ;89(24): 5430 UI - 11044 AU - Fuentes-Carrera I AU - Amram P AU - Rosado M AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoLab Astrophys Marseille, Marseille, FranceFuentes-Carrera, I, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Dark matter haloes in interacting isolated galaxy pairs: The Importance of the H alpha rotation curve AB - We present Halpha scanning Fabry-Perot observations of the interacting galaxy pair NGC 3893/96 (Kar 302), an M51-type galaxy pair. The velocity field and rotation curve of the main galaxy (NGC 3893) were derived. These show the galaxy follows a rather axisymmetric behaviour. Together with HI observations, several mass models were adjusted in order to study the nature of the dark halo as well as the mass-to-light ratio of the galaxy. We find that in order to constrain these models, it is important to have a high resolution Halpha rotation curve for the inner parts of the galaxy MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000175921200095 L2 - CLUSTER SO - Astrophysics and Space Science 2002 ;281(1-2):411-414 5431 UI - 10701 AU - Fuentes ME AU - Mehta A AU - Lascano L AU - Camacho H AU - Chianelli R AU - Fernandez JF AU - Fuentes L AD - Ctr Invest Mat Avanzados, Chih, MexicoStanford Synchrotron Radiat Lab, Stanford, CA 94309, USAInst Ceram & Vidrio, Arganda Del Rey, SpainUniv Texas, El Paso, TX 79968, USAFuentes, ME, Ctr Invest Mat Avanzados, Chih, Mexico TI - The crystal structure of BaBi4Ti4O15 AB - The room temperature structure of BaBi4Ti4O15 is determined by means of high resolution synchrotron x-ray powder diffraction. At Stanford Synchrotron Radiation Lab., the sample was mounted on a zero background holder and data was collected in reflection geometry at 10 KeV (1.24 Angstrom) from 2degrees to 138degrees in 2theta. Rietveld refinement was performed with programs FULLPROF and GSAS. Starting space group followed Aurivillius' choice 14/mmm. This tetragonal symmetry group does not explain observed peaks splitting, so orthorhombic symmetry was selected. Symmetry F2mm was considered, for it is consistent with observed electric dipole moment in the elementary cell. The selected space group allowed stable and accurate convergence of the refinement. Treatment of the experimental data included diffuse scattering characterization. Structured background fitting gave place to the derivation of the radial distribution function, as a measurement of short range segregation. BaBi4Ti4O15 is orthorhombic, polar and with partial short-range ordering of the Ba and Bi ions. Variations of atomic coordinates, relative to those corresponding to the tetragonal paraelectric condition, give place to the appearance of spontaneous electric polarisation MH - Mexico|Chihuahua MH - Spain MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000176861800028 L2 - Aurivillius;Rietveld refinement;synchrotron radiation;SINGLE-CRYSTAL; AURIVILLIUS SO - Ferroelectrics 2002 ;269():159-164 5432 UI - 10462 AU - Fujita Y AU - Sarazin CL AU - Kempner JC AU - Rudnick L AU - Slee OB AU - Roy AL AU - Andernach H AU - Ehle M AD - Natl Astron Observ, Tokyo 1818588, JapanUniv Virginia, Dept Astron, Charlottesville, VA 22903, USAUniv Minnesota, Dept Astron, Minneapolis, MN 55455, USACSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaMax Planck Inst Radioastron, D-53121 Bonn, GermanyUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoXMM Newton Sci Operat Ctr, E-28080 Madrid, SpainESA, ESTEC, Res & Sci Support Dept, Sci Operat & Data Syst Div, NL-2200 AG Noordwijk, NetherlandsFujita, Y, Natl Astron Observ, Osawa 2-21-1, Tokyo 1818588, Japan TI - Chandra observations of the disruption of the cool core in A133 AB - We present the analysis of a Chandra observation of the galaxy cluster A133, which has a cooling flow core, a central radio source, and a diffuse, filamentary radio source that has been classified as a radio relic. The X-ray image shows that the core has a complex structure. The most prominent feature is a tongue of emission that extends from the central cD galaxy to the northwest and partly overlaps the radio relic. Spectral analysis shows that the emission from the tongue is thermal emission from relatively cool gas at a temperature of similar to1.3 keV. One possibility is that this tongue is produced by Kelvin-Helmholtz (KH) instabilities through the interaction between the cold gas around the cD galaxy and hot intracluster medium. We estimate the critical velocity and timescale for the KH instability to be effective for the cold core around the cD galaxy. We find that the KH instability can disrupt the cold core if the relative velocity is greater than or similar to400 km s(-1). We compare the results with those of clusters in which sharp, undisrupted cold fronts have been observed; in these clusters, the low-temperature gas in their central regions has a more regular distribution. In contrast to A133, these cluster cores have longer timescales for the disruption of the core by the KH instability when they are normalized to the timescale of the cD galaxy motion. Thus, the other cores are less vulnerable to KH instability. Another possible origin of the tongue is that it is gas that has been uplifted by a buoyant bubble of non-thermal plasma that we identify with the observed radio relic. From the position of the bubble and the radio estimate of the age of the relic source, we estimate a velocity of 700 km s(-1) for the bubble. The structure of the bubble and this velocity are consistent with numerical models for such buoyant bubbles. The energy dissipated by the moving bubble may affect the cooling flow in A133. The combination of the radio and X-ray observations of the radio relic suggest that it is a relic radio lobe formerly energized by the central cD rather than a merger shock generated cluster radio relic. The lobe may have been displaced from the central cD galaxy by the motion of the cD galaxy or by the buoyancy of the lobe MH - Australia MH - Germany MH - Japan MH - Mexico|Guanajuato MH - Netherlands MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000177430600014 L2 - cooling flows;galaxies : clusters : general;galaxies : clusters : individual (A133);intergalactic medium;radio continuum : galaxies;X-rays : galaxies : clusters;RAY-EMITTING GAS; HYDRA-A CLUSTER; X-RAY; MASS-DISTRIBUTION; PERSEUS CLUSTER; TEMPERATURE MAP; HIGH-RESOLUTION; FLOW CLUSTERS; RADIO-SOURCES; DARK-MATTER SO - Astrophysical Journal 2002 ;575(2):764-778 5433 UI - 9729 AU - Funes S AU - Davidson E AU - Reyes-Prieto A AU - Magallon S AU - Herion P AU - King MP AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoThomas Jefferson Univ, Dept Mol Pharmacol & Biochem, Philadelphia, PA 19107, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoGonzalez-Halphen, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, Mexico TI - A green algal apicoplast ancestor MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 51 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000179773700038 L2 - MITOCHONDRIAL GENOME; PARASITES; NUCLEAR; GENES; APICOMPLEXAN; EVOLUTION; PLASTIDS; ORIGIN; DNA SO - Science 2002 ;298(5601):2155-2155 5434 UI - 11724 AU - Funes S AU - Davidson E AU - Claros MG AU - van Lis R AU - Perez-Martinez X AU - Vazquez-Acevedo M AU - King MP AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoThomas Jefferson Univ, Dept Biochem & Mol Pharmacol, Philadelphia, PA 19107, USAUniv Malaga, Fac Ciencias, Dept Biol Mol & Bioquim, E-29071 Malaga, SpainGonzalez-Halphen, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-243, Mexico City 04510, DF, Mexico TI - The typically mitochondrial DNA-encoded ATP6 subunit of the F1F0-ATPase is encoded by a nuclear gene in Chlamydomonas reinhardtii AB - The atp6 gene, encoding the ATP6 subunit of F1F0-ATP synthase, has thus far been found only as an mtDNA-encoded gene. However, atp6 is absent from mtDNAs of some species, including that of Chlamydomonas reinhardtii. Analysis of C. reinhardtii expressed sequence tags revealed three overlapping sequences that encoded a protein with similarity to ATP6 proteins. PCR and 5'- and 3'-RACE were used to obtain the complete cDNA and genomic sequences of C. reinhardtii atp6. The atp6 gene exhibited characteristics of a nucleus-encoded gene: Southern hybridization signals consistent with nuclear localization, the presence of introns, and a codon usage and a polyadenylation signal typical of nuclear genes. The corresponding ATP6 protein was confirmed as a subunit of the mitochondrial F1F0-ATP synthase from C. reinhardtii by N-terminal sequencing. The predicted ATP6 polypeptide has a 107-amino acid cleavable mitochondrial targeting sequence. The mean hydrophobicity of the protein is decreased in those transmembrane regions that are predicted not to participate directly in proton translocation or in intersubunit contacts with the multimeric ring of c subunits. This is the first example of a mitochondrial protein with more than two transmembrane stretches, directly involved in proton translocation, that is nucleus-encoded MH - Mexico|Distrito Federal MH - Spain MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000173989200048 L2 - COMPLETE SEQUENCE; SCENEDESMUS-OBLIQUUS; NUCLEOTIDE-SEQUENCE; PROTEIN-STRUCTURE; APOCYTOCHROME-B; SYNTHASE; GENOME; MEMBRANE; PARAMECIUM; DISORDERS SO - Journal of Biological Chemistry 2002 ;277(8):6051-6058 5435 UI - 9934 AU - Furumura T AU - Singh SK AD - Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 1130032, JapanNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoFurumura, T, Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, 1-1-1 Yayoi, Tokyo 1130032, Japan TI - Regional wave propagation from Mexican subduction zone earthquakes: The attenuation functions for interplate and inslab events AB - The seismic waves from subduction zone earthquakes are significantly affected by the presence of 3D variation in crust and upper-mantle structure around the source area. These heterogeneous structures also profoundly modify the character of seismic waves as they propagate from the source area to regional distances. This is illustrated by studying shallow, interplate earthquakes along the Mexican subduction zone, and deeper, inslab, normal-faulting earthquakes in the subducted Cocos plate beneath Mexican mainland. The strong-motion recordings of these earthquakes are used to evaluate the character of wave propagation along the path between the source region and Mexico City. We compare the wavefield from two large earthquakes of different source type. During the shallow (H = 17 km), interplate, 1995 Guerrero earthquake (M-w 7.3), the Lg phase is the most prominent feature at regional distances of about 150 to a few hundred kilometers from the source. The presence of a lateral velocity gradient in the crust, caused by the subduction of the Cocos plate, enhances the Lg-wave amplitude, which is then amplified further in the Mexican Volcanic belt by amplification in the low-velocity volcanic rocks. Both effects lead to very large ground motions along the path from the coast to the Mexican inland, in the frequency band from 0.2 to 4 Hz. However, for the deeper (H 40 km), inslab, normal-faulting, 1999 Oaxaca earthquake (M-w 7.5), the amplitude of the Lg phase is too small to produce the abnormal wave propagation, and the direct S wave and its multiple SmS reflections between the free-surface and Moho show a simple attenuation with increasing distance. We compare these observations with numerical simulations of seismic-wave propagation using the Fourier spectral method. The results provide a key to the understanding of seismic-wave field generated by shallow interplate and deeper inslab earthquakes in a realistic 3D heterogeneous structure MH - Japan MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000179024900004 L2 - 1985 MICHOACAN EARTHQUAKE; STRONG GROUND MOTION; FOURIER METHOD; LONG-DURATION; CITY; GUERRERO; AMPLIFICATION; SITE; OAXACA; VALLEY SO - Bulletin of the Seismological Society of America 2002 ;92(6):2110-2125 5436 UI - 9890 AU - gadillo-Velazquez O AU - Vivaldo-Lima E AU - Quintero-Ortega IA AU - Zhu SP AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Ingn, Mexico City 04510, DF, MexicoMcMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7, CanadaMcMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, CanadaVivaldo-Lima, E, Natl Autonomous Univ Mexico, Fac Quim, Dept Ingn, Conjunto E, Mexico City 04510, DF, Mexico TI - Effects of diffusion-controlled reactions on atom-transfer radical polymerization AB - A kinetic model incorporating effects of diffusion-controlled reactions on atom-transfer radical polymerization (ATRP) was developed. The reactions considered to be diffusion-controlled are monomer propagation, bimolecular radical termination, chain transfer between propagating radical and catalyst, and transfer to small molecules. Model predictions indicate that a diffusion-controlled propagation reduces the "living" behavior of the system, whereas a diffusion-controlled termination enhances its livingness. When diffusion-controlled transfer between chains and catalyst is considered the same in the forward and backward directions, the livingness of the system is enhanced, but if one of them is kept unchanged while the other is increased, the livingness of the system is reduced. When diffusion-controlled termination is important, our simulations show that the overall effect of diffusion-controlled phenomena in A TRP is to enhance the livingness of the system. Experimental data from the literature for styrene, methyl methacrylate, and methyl acrylate ATRP homopolymerizations validate the kinetic model MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: AMER INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 18 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0001-1541 UR - ISI:000179203600017 L2 - METHYL-METHACRYLATE; RATE COEFFICIENTS; KINETIC-ANALYSIS; STYRENE; SIMULATIONS; TERMINATION SO - Aiche Journal 2002 ;48(11):2597-2608 5437 UI - 9486 AU - gado-Escueta AV AU - Medina MT AU - Bai DS AU - Fong CY AU - Tanaka M AU - Alonso ME AD - Univ Calif Los Angeles, Los Angeles, CA 90024, USAAutonomous Natl Univ Honduras, Honduran Assoc Neurol, Fac Med Sci, Tegucigalpa, HondurasQueen Mary Hosp, Div Neurol, Hong Kong, Hong Kong, Peoples R ChinaChinese Acad Sci, Shanghai, Peoples R ChinaNatl Inst Neurol & Neurosurg, Dept Genet, Mexico City, DF, MexicoDelgado-Escueta, AV, Univ Calif Los Angeles, Los Angeles, CA 90024, USA TI - Genetics of idiopathic myoclonic epilepsies: An overview MH - Honduras MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 5 U4 - Clinical Neurology;Neurosciences U5 - S;Article AV - English IS - 0091-3952 UR - ISI:000180075900019 L2 - FRONTAL-LOBE EPILEPSY; FAMILIAL NEONATAL CONVULSIONS; FEBRILE SEIZURES PLUS; CHILDHOOD ABSENCE EPILEPSY; ONSET ALZHEIMERS-DISEASE; NEURONAL SODIUM-CHANNEL; GENERALIZED EPILEPSY; SUSCEPTIBILITY LOCUS; ROLANDIC EPILEPSY; Y-CHROMOSOME SO - Myoclonus and Paroxysmal Dyskinesias 2002 ;89():161-184 5438 UI - 10559 AU - gado-Escueta AV AU - Bai D AU - Bailey J AU - Medina MT AU - Alonso ME AU - Morita R AU - Suzuki T AU - Ganesh S AU - Sugimoto T AU - Yamakawa K AU - Ochoa A AU - Jara-Prado A AU - Rasmussen A AU - Ramos-Peek J AU - Cordova S AU - Onn FRD AD - RIKEN, Neurogenet Lab, Tokyo, JapanInst Neurol & Neurocirurgia, Ciudad Mexico, MexicoUniv Nacl Autonoma, Tegucigalpa, HondurasUniv Calif Los Angeles, Los Angeles, CA, USAUniv Calif Los Angeles, Div Genet Stat, Inst Neuropsychiat, Los Angeles, CA, USAUniv Calif Los Angeles, Ctr Med VA GLAHS, Gen Program Epilepsy, Sch Med,Lab Genet Genom Epilepsy, Los Angeles, CA 90024, USA TI - Juvenile myoclonic epilepsy in chromosome 6p12: Clinical and genetic advances AB - Amongst idiopathic generalized epilepsies, juvenile myoclonic epilepsy (JME) is the most common, accounting for 12 to 30% of all epilepsies in the Western world. 'Classic' JME consists of awakening myoclonias, grand mal convulsions and EEG 4 to 6 Hz polyspike waves that appear in adolescence. Probands and affected family members do not have pyknoleptic 3 Hz spike and wave absences. However, in 10 to 30% of patients, rare or spanioleptic polyspike wave absences appear, In 1988, 1995 and 1996, we mapped 'classic' JME to a 7 cM locus in chromosome 6p12-11, called EJM1, using families from Los Angeles and Belize. In 2001, we studied one large family from Belize and 21 new families from Los Angeles and Mexico cities, aided by a BA CIPA C based physical map and six new dinucleotide repeats, to narrow EJM1 to an interval between D6S272 and D6S1573. In 2002, we found myoclonin, the putative gene for typical JME in 6p12. At the congress, we will reveal the identity of the myoclonin gene, its putative function and discuss the significance of this discovery in the JME population at large MH - Honduras MH - Japan MH - Mexico|Distrito Federal MH - USA PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000177126700015 L2 - chromosome 6p12;epilepsy and polyspike wave causing gene;juvenile myoclonic epilepsy;IDIOPATHIC GENERALIZED EPILEPSY; CHILDHOOD ABSENCE EPILEPSY; SUSCEPTIBILITY LOCUS; LAFORA TYPE; LINKAGE; HETEROGENEITY; FAMILIES; SEIZURES; 8Q24 SO - Revista de Neurologia 2002 ;35(1):82-86 5439 UI - 9655 AU - Gaggero-Sager LM AU - Mora-Ramos ME AD - CSIC, Inst Ciencia Mat Madrid, Madrid, SpainAutonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoGaggero-Sager, LM, CSIC, Inst Ciencia Mat Madrid, Cantoblanco, Madrid, Spain TI - Single-particle energy states in the two-dimensional electron gas of GaN-based single heterostructure field effect transistors AB - A Thomas-Fermi-based model for the electronic energy spectrum in nitride single heterostructure field effect transistors is introduced. The high values of the sheet density charges induced at an AlxGa1-xN/GaN interface guarantee the validity of the approximation. As a result, a simple analytical potential model becomes available for device designing. Single electron states contain information of the many-body Coulomb effects in the gas through the Hartree and exchange potentials. Qualitative features of the potential profile and energy spectrum are well reproduced. Comparison with reported self-consistent Schrodinger-Poisson calculations gives a very good quantitative agreement as well. Results are also used to estimate the drift mobility in the two-dimensional electron gas adjacent to the interface. A new way of determining the strain relaxation in the AlxGa1-xN layer is proposed MH - Mexico|Morelos MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000179545000012 L2 - THOMAS-FERMI APPROXIMATION; PIEZOELECTRIC POLARIZATION; DENSITY SO - Semiconductor Science and Technology 2002 ;17(11):1180-1183 5440 UI - 9656 AU - Galan OV AU - Larramendi JV AU - Riech I AU - Pena G AU - Iribarren A AU - guilar-Hernandez J AU - Contreras-Puente G AD - Univ La Habana, Fac Fis, IMRE, Havana 10400, CubaIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, MexicoIPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoIPN Altamira, CICATA, Mexico City, DF, MexicoGalan, OV, Univ La Habana, Fac Fis, IMRE, Havana 10400, Cuba TI - Characterization of the passivation of CdS thin films grown by chemical bath deposition on InP AB - Thin films of US with different nominal ratios c (thiourea)/c (CdCl2) have been grown by conventional chemical bath deposition on an InP substrate, in order to study the influence of each film on the surface passivation of the InP sample. The values of the surface recombination velocity were determined by the photoacoustic technique (PA) and photoluminescence. Atomic force microscopy measurements were also used to correlate the results obtained from the PA measurements MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000179545000015 L2 - CADMIUM-SULFIDE; SURFACE SO - Semiconductor Science and Technology 2002 ;17(11):1193-1197 5441 UI - 9820 AU - Gall D AU - Nielsen K AU - Bermudez MR AU - Moreno F AU - Smith P AD - Inst Anim Dis Res, Canadian Food Inspect Agcy, Nepean, ON K2H 8P9, CanadaUniv Autonoma Baja California, Coll Vet Med, Mexicali, Baja California, MexicoGall, D, Inst Anim Dis Res, Canadian Food Inspect Agcy, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada TI - Fluorescence polarization assay for detection of Brucella abortus antibodies in bulk tank bovine milk samples AB - A simple, rapid, inexpensive fluorescence polarization assay for the detection of antibodies to Brucella abortus in bulk tank milk samples at the farm level or at dairies with a sensitivity and specificity of 100 and 95.9%, respectively, is described. The assay detects antibodies to B. abortus in 15 min by testing undiluted whey produced by chemical and physical manipulation of milk from bulk tanks. This sampling is noninvasive and therefore costs less and is less stressful than blood-based tests. The assay is specific and can detect antibodies fit levels below that of the indirect enzyme immunoassay for milk and the fluorescence polarization assay for individual milk samples. Use of this test would make programs for surveillance of dairy animals and eradication of B. abortus more cost-effective MH - Canada MH - Mexico|Baja California PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1071-412X UR - ISI:000179271100033 L2 - LINKED IMMUNOSORBENT-ASSAY; ENZYME-IMMUNOASSAY; INDIRECT ELISA; DIAGNOSIS; SERUM; VALIDATION SO - Clinical and Diagnostic Laboratory Immunology 2002 ;9(6):1356-1360 5442 UI - 10777 AU - Gallardo PP AU - Pedroza-Islas R AU - Garcia-Galano T AU - Pascual C AU - Rosal C AU - Sanchez A AU - Gaxiola G AD - UNAM, Fac Ciencias, Grp Biol Marina Expt, Campeche, MexicoUniv Iberoamer, Dept Ingn, Mexico City, DF, MexicoUniv La Habana, Ctr Invest Marinas, Havana, CubaGaxiola, G, UNAM, Fac Ciencias, Grp Biol Marina Expt, Calle 26 1 Colonia Playa Norte,Ciudad Carmen,Apdo, Campeche, Mexico TI - Replacement of live food with a microbound diet in feeding Litopenaeus setiferus (Burkenroad) larvae AB - Microbound feeds have been well accepted by shrimps and farmers in many penaeid shrimp hatcheries. The present study focused on an adequate level of replacement of Artemia nauplii and microalgae by a microbound diet for rearing Litopenaeus setiferus (Burkenroad) larvae. A microbound diet (MBD) consisting of fishmeal, squid meal, shrimp meal, yeast meal and soybean meal was used. The first experiment was designed to obtain the optimum level of MBD to complete the live feeding schedule, from Protozoea (PZ(III) ) to Mysis (M-III ). The experimental levels of the microbound diet tested were 2, 4, 6 and 8 mg MBD L-1 day(-1) . The next step was to determine the Artemia nauplii replacement level from PZ(I) to M-III by MBD. These experiments were carried out either in the presence (Experiment 2) or in the absence of algae (Experiment 3). Four replacement levels were tested: 0% (4 mg MBD L-1 day(-1) : 1 Artemia nauplii mL(-1) ), 40% (5.5 mg MBD L-1 day(-1) : 0.6 Artemia nauplii), 60% (6.5 mg MBD L-1 day(-1) : 0.4 Artemia nauplii) and 100% (8 mg MBD L-1 day(-1) : 0 Artemia nauplii). In all experiments growth, survival, development, quality index (QI) and performance index (PI), were used to determine the optimum concentration of microbound diet. Results showed that 6 mg MBD L-1 day(-1) can be recommended as a complement to live food for L. setiferus larvae from PZ(III) to M-III . In the presence of algae, maximum growth and survival may be obtained in 40-60% (5.5-6.5 mg MBD L-1 day(-1) ) of Artemia nauplii replacement levels. In the absence of algae, the Artemia nauplii replacement resulted in slower development, less salinity resistance, lower growth and lower survival than was obtained in larvae fed with algae MH - Cuba MH - Mexico|Campeche MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000176688500005 L2 - Litopenaeus setiferus larvae;feeding and nutrition crustaceans;microbound diet;Artemia replacement;PENAEUS-JAPONICUS SO - Aquaculture Research 2002 ;33(9):681-691 5443 UI - 10571 AU - Galvan-Tejada N AU - Bernes S AU - Castillo-Blum SE AU - Noth H AU - Vicente R AU - Barba-Behrens N AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, Cuidad Univ, Mexico City 04510, DF, MexicoUAP, Ctr Quim IC, Puebla 72000, MexicoUniv Munich, Inst Inorgan Chem, D-81377 Munich, GermanyUniv Barcelona, Dept Quim Inorgan, Barcelona 08028, SpainBarba-Behrens, N, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, Cuidad Univ, Mexico City 04510, DF, Mexico TI - Supramolecular structures of metronidazole and its copper(II), cobalt(II) and zinc(II) coordination compounds AB - In this work we present the synthesis and structural and spectroscopic characterization of Cu-II, Co-II and Zn-II coordination compounds with the antibiotic metronidazole (=emni). Coordination to metal ions is through its imidazolic nitrogen, while the hydroxyethyl and nitro groups act as supramolecular synthons. [Co(emni)(2)Br-2], and [Zn(emni)(2)X-2] (X- = Cl, Br) stabilize zig-zag chains, and a 2D supramolecular structure is formed by inter-chain contacts through inter-molecular hydrogen-bonding. Pleated sheet or layers are formed by [Co(emni)(2)Cl-2] and [Cu(emni)(2)Cl(H2O)](2)Cl-2, respectively. The dinuclear Cu-II compound [Cu(emni)mu(O2CMe)(2)](2) gives a one-dimensional zig-zag arrangement. The contribution of metal ions in metronidazole coordination compounds is shown in the stabilization of the different aggregate structures. (C) 2002 Elsevier Science Inc. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0162-0134 UR - ISI:000177141500039 L2 - metronidazole;Co-II;Cu-II;Zn-II coordination compounds;supramolecular arrangements;PLATINUM(II) NITROIMIDAZOLE COMPLEXES; STATE GAMMA-RADIOLYSIS; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; FLASH-PHOTOLYSIS; METAL-COMPLEXES; RADICAL-ANIONS; DIMERS; RADIOSENSITIZATION; DERIVATIVES SO - Journal of Inorganic Biochemistry 2002 ;91(1):339-348 5444 UI - 11311 AU - Gama A AU - Flores-Lopez LZ AU - Aguirre G AU - Parra-Hake M AU - Somanathan R AU - Walsh PJ AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoUniv Penn, Dept Chem, Philadelphia, PA 19104, USASomanathan, R, Inst Tecnol Tijuana, Ctr Grad & Invest, Apartado Postal 1166, Tijuana 22000, BC, Mexico TI - Steric effects in the design of chiral Schiff base-titanium complexes: new catalysts for asymmetric trimethylsilylcyanation of aldehydes AB - New chiral Schiff base ligands derived from salicylaldehydes bearing bulky ring substituents were synthesized by reaction with various amino alcohols. These new ligands were used with titanium tetraisopropoxide to study steric effects on the enantioselectivity of the trimethylsilyleyanation of aldehydes. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000175109200009 L2 - HIGH OPTICAL PURITY; ENANTIOSELECTIVE TRIMETHYLSILYLCYANATION; CYANOHYDRINS; (R)-CYANOHYDRINS; KETONES SO - Tetrahedron-Asymmetry 2002 ;13(2):149-154 5445 UI - 11790 AU - Gamboa SA AU - Sebastian PJ AU - Feng F AU - Geng M AU - Northwood DO AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Morelos, MexicoUniv Windsor, Dept Mech & Mat Engn, Windsor, ON, CanadaRyerson Polytech Univ, Fac Engn & Appl Sci, Toronto, ON, CanadaGamboa, SA, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Morelos, Mexico TI - Cyclic voltametry investigation of a metal hydride electrode for nickel metal hydride batteries AB - In this study, an AB(5)-type hydrogen-absorbing alloy, Mm(Ni0.71Co0.14Al0.08Mn0.06)(5.02), was used as the negative electrode material. The metal-hydride (MH) electrode was charge/discharged over 200 cycles. The discharge capacity of the alloy was 250 mAh g(-1). The specific discharge capacity as a function of discharge current density and temperature effect is also discussed. Hydrogen diffusion reaction in the MH alloy powder of the negative MH alloy electrode dominates the high-rate discharge capability of the metal hydride electrode in a nickel metal hydride (Ni/MH) battery. Cyclic voltametry technique was used to analyze the charge-transfer reactions at the electrode/electrolyte interface and hydrogen surface coverage capacity. The charge-transfer reaction in the negative electrode reflects a capability of hydrogen reduction and oxidation reactions at the electrode/electrolyte interface. (C) 2001 The Electrochemical Society MH - Canada MH - Mexico|Morelos PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 2 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000173853800009 L2 - HYDROGEN STORAGE ALLOYS SO - Journal of the Electrochemical Society 2002 ;149(2):A137-A139 5446 UI - 10048 AU - Gan B AU - Ahn J AU - Zhang Q AU - Yoon SF AU - Melendrez R AU - Barboza-Flores M AD - Univ Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoNanyang Technol Univ, Ctr Microelect, Singapore 639798, SingaporeBarboza-Flores, M, Univ Sonora, Ctr Invest Fis, POB 5-088, Hermosillo 83190, Sonora, Mexico TI - Chemically vapor deposited diamond film ultraviolet thermoluminescence dosimeter AB - Thermoluminescence (TL) ultraviolet dosimetric characterization of chemically vapor deposited (CVD) diamond film has been performed. The 9-mum-thick film was exposed to UV radiation and exhibited an excitation thermoluminescence spectrum peaked at 220 nm with a significant TL efficiency in the 180-260 nm range. The deep ultraviolet response for lambda < 220 nm makes the material suitable for photodetectors and dosimeters with high discrimination between UV and visible light. The high-intensity TL band at 587 K has a broad emission band around 470 nm and shows linear behavior as a function of radiation dose, rendering this peak to be an adequate dosimetric one for ultraviolet dosimetry. The reading of the absorbed irradiation dose does not require any previous annealing or thermal bleaching of low-temperature glow peaks. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Sonora MH - Singapore PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000178527600016 L2 - diamond films;thermoluminescence;UV detectors;UV dosimetry;CVD diamond;UV radiation effects;radiation damage;CVD DIAMOND; ALPHA-AL2O3 CRYSTALS; RADIATION; IRRADIATION; DEPENDENCE; DETECTORS SO - Materials Letters 2002 ;56(1-2):80-84 5447 UI - 11081 AU - Ganesh S AU - gado-Escueta AV AU - Sakamoto T AU - Avila MR AU - hado-Salas J AU - Hoshii Y AU - Akagi T AU - Gomi H AU - Suzuki T AU - Amano K AU - Agarwala KL AU - Hasegawa Y AU - Bai DS AU - Ishihara T AU - Hashikawa T AU - Itohara S AU - Cornford EM AU - Niki H AU - Yamakawa K AD - RIKEN, Brain Sci Inst, Lab Neurobiol Emot, Wako, Saitama 3510198, JapanRIKEN, Brain Sci Inst, Lab Neural Architecture, Wako, Saitama 3510198, JapanRIKEN, Brain Sci Inst, Lab Behav Genet, Wako, Saitama 3510198, JapanUniv Nacl Autonoma Mexico, Dept Neurociencias, Mexico City 04510, DF, MexicoYamaguchi Univ, Sch Med, Dept Pathol 1, Yamaguchi, JapanVA GLAHS W Los Angeles Med Ctr, Los Angeles, CA, USAUniv Calif Los Angeles, Sch Med, Comprehens Epilepsy Program, Los Angeles, CA, USAUniv Calif Los Angeles, Sch Med, Epilepsy Genet Genom Labs, Los Angeles, CA, USARIKEN, Brain Sci Inst, Neurogenet Lab, Wako, Saitama 3510198, JapanDelgado-Escueta, AV, RIKEN, Brain Sci Inst, Neurogenet Lab, 2-1 Hirosawa, Wako, Saitama 3510198, Japan TI - Targeted disruption of the Epm2a gene causes formation of Lafora inclusion bodies, neurodegeneration, ataxia, myoclonus epilepsy and impaired behavioral response in mice AB - Mutations in the EPM2A gene encoding a dual-specificity phosphatase (laforin) cause Lafora disease (LD), a progressive and invariably fatal epilepsy with periodic acid-Schiff-positive (PAS+) cytoplasmic inclusions (Lafora bodies) in the central nervous system. To study the pathology of LD and the functions of laforin, we disrupted the Epm2a gene in mice. At two months of age, homozygous null mutants developed widespread degeneration of neurons, most of which occurred in the absence of Lafora bodies. Dying neurons characteristically exhibit swelling in the endoplasmic reticulum, Golgi networks and mitochondria in the absence of apoptotic bodies or fragmentation of DNA. As Lafora bodies become more prominent at 4-12 months, organelles and nuclei are disrupted. The Lafora bodies, present both in neuronal and non-neural tissues, are positive for ubiquitin and advanced glycation end-products only in neurons, suggesting different pathological consequence for Lafora inclusions in neuronal tissues. Neuronal degeneration and Lafora inclusion bodies predate the onset of impaired behavioral responses, ataxia, spontaneous myoclonic seizures and EEG epileptiform activity. Our results suggest that LD is a primary neurodegenerative disorder that may utilize a non-apoptotic mechanism of cell death MH - Japan MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 32 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0964-6906 UR - ISI:000175856200001 L2 - GLYCATION END-PRODUCTS; ALZHEIMERS-DISEASE; MAILLARD REACTION; BODY DISEASE; UBIQUITIN; PROTEINS; SYSTEM; STRESS; MODEL SO - Human Molecular Genetics 2002 ;11(11):1251-1262 5448 UI - 11082 AU - Ganesh S AU - gado-Escueta A AU - Suzuki T AU - Francheschetti S AU - Riggio C AU - Avanzini G AU - Rabinowicz A AU - Bohlega S AU - Bailey J AU - Alonso ME AU - Rasmussen A AU - Thomson AE AU - Ochoa A AU - Prado AJ AU - Medina MT AU - Yamakawa K AD - VA GLAHC Med Ctr, Comprehans Epilepsy Program, Epilepsy Genet Genom Labs, Los Angeles, CA 90073, USARIKEN, Brain Sci Inst, Neurogenet Lab, Wako, Saitama 35101, JapanUniv Calif Los Angeles, Sch Med, Epilepsy Genet Genom Labs, Comprehens Epilepsy Program, Los Angeles, CA, USAInst Nazl Neurol, Milan, ItalyFLENI Med Ctr, Buenos Aires, DF, ArgentinaKing Faisal Med Ctr, Riyadh, Saudi ArabiaNatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoUniv Natl Autonoma Honguras, Direcc Invest Cient, Tegulcigalpa, HondurasDelgado-Escueta, A, VA GLAHC Med Ctr, Comprehans Epilepsy Program, Epilepsy Genet Genom Labs, 11301 Wilshire Blvd, Los Angeles, CA 90073 USA TI - Genotype-phenotype correlations for EPM2A mutations in Lafora's progressive myoclonus epilepsy: exon 1 mutations associate with an early-onset cognitive deficit subphenotype AB - Mutations in the EPM2A gene encoding a dual-specificity phosphatase (laforin) cause an autosomal recessive fatal disorder called Lafora's disease (LD) classically described as an adolescent-onset stimulus-sensitive myoclonus, epilepsy and neurologic deterioration. Here we related mutations in EPM2A with phenotypes of 22 patients (14 families) and identified two subsyndromes: (I) classical LD with adolescent-onset stimulus-sensitive grand mal, absence and myoclonic seizures followed by dementia and neurologic deterioration, and associated mainly with mutations in exon 4 (P=0.0007); (ii) atypical LD with childhood-onset dyslexia and learning disorder followed by epilepsy and neurologic deterioration, and associated mainly with mutations in exon 1 (P=0.0015). To understand the two subsyndromes better, we investigated the effect of five missense mutations in the carbohydrate-binding domain (CBD-4; coded by exon 1) and three missense mutations in the dual phosphatase domain (DSPD; coded by exons 3 and 4) on laforin's intracellular localization in HeLa cells. Expression of three mutant proteins (T1941, G279S and Y294N) in DSPD formed ubiquitin-positive cytoplasmic aggregates, suggesting that they were folding mutants set for degradation. In contrast, none of the three CBD-4 mutants showed cytoplasmic clumping. However, CBD-4 mutants W32G and R108C targeted both cytoplasm and nucleus, suggesting that laforin had diminished its usual affinity for polysomes. Our data, thus, represent the first report of a novel childhood syndrome for LD. Our results also provide clues for distinct roles for the CBD-4 and DSP domains of laforin in the etiology of two subsyndromes of LD MH - Argentina MH - Honduras MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Saudi Arabia MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0964-6906 UR - ISI:000175856200002 L2 - GENE; DISEASE; PROTEIN; IDENTIFICATION; SPECTRUM; SKIN SO - Human Molecular Genetics 2002 ;11(11):1263-1271 5449 UI - 11680 AU - Garay G AU - Mardones D AU - Rodriguez LF AU - Caselli P AU - Bourke TL AD - Univ Chile, Dept Astron, Santiago, ChileUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoOsserv Astrofis Arcetri, I-50125 Florence, ItalyHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAGaray, G, Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile TI - Methanol and silicon monoxide observations toward bipolar outflows associated with Class 0 objects AB - We report Swedish-ESO Submillimetre Telescope observations of seven bipolar outflows thought to be associated with Class 0 objects in the upsilon=0 J=3-->2 and J=2-->1 transitions of SiO and J(k)= 3(k)-->2(k) and J(k)=2(k)-->1k transitions of CH3OH. Methanol and silicon monoxide emission from outflowing gas were detected toward the lobes of four objects (NGC 2264G, IRAS 16293-2422, Serpens S68N, and Serpens SMM 4). The SiO line profiles are characteristics of C-type bow shocks, showing a peak at a radial velocity close to but displaced from the ambient cloud velocity and a gradual decrease in intensity from the peak toward higher flow velocities. There is a significant correlation between the column density of SiO and the terminal SiO flow velocity, which suggests a velocity-selective enhancement in the production of SiO molecules. We find that the SiO abundance in the lobes is enhanced with respect to that of the ambient cloud by a factor of at least 330 in IRAS 16293-2422 and SMM 4, 170 in NGC 2264G, and 80 in S68N. The abundance is enhanced by a factor of 500 in CH 3 OH IRAS 16293-2422, 330 in SMM 4, 80 in S68N, and 23 in NGC 2264G. In addition, we find that the dependence of the SiO/CO and CH3OH/CO abundance ratios with radial flow velocity shows a steep increase in the range from similar to0 to similar to4-5 km s(-1) and a gradual decline toward higher flow velocities. In the remaining three sources (CG 30, IRAS 13036-7644, and VLA 1623-243), emission in methanol was detected from a narrow line at the velocity of the ambient cloud, and no emission was detected in silicon monoxide. Weak methanol emission from a low-velocity outflow component was detected toward CG 30 MH - Chile MH - Italy MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-637X UR - ISI:000174210400027 L2 - ISM : abundances;ISM : individual (IRAS 16293-2422, NGC 2264G, Serpens);ISM : jets and outflows;ISM : molecules;stars : formation;YOUNG STELLAR OBJECTS; OB1 MOLECULAR CLOUD; RHO-OPHIUCHI CLOUD; GRAIN-GRAIN COLLISIONS; SMALL DARK CLOUDS; STAR-FORMATION; INTERSTELLAR SHOCKS; IRAS 16293-2422; NGC 2264G; SUBMILLIMETER CONTINUUM SO - Astrophysical Journal 2002 ;567(2):980-998 5450 UI - 9269 AU - Garces-Chavez V AU - Volke-Sepulveda K AU - Chavez-Cerda S AU - Sibbett W AU - Dholakia K AD - Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandINAOE, Grp Foton & Fis Opt, Puebla 72000, MexicoDholakia, K, Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland TI - Transfer of orbital angular momentum to an optically trapped low-index particle AB - We demonstrate the transfer of orbital angular momentum from a light beam to a trapped low-index particle.. The particle is trapped in a dark annular region of a high-order Bessel beam and rotates around the beam axis due to scattering from the helical wave fronts of the light beam. A general theoretical geometrical optics model. is developed that, applied to our specific situation, corroborates tweezing and transfer of orbital angular momentum to the low-index particle. Good quantitative agreement between theory and experiment for particle rotation rates is observed MH - Mexico|Puebla MH - United Kingdom PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000180656800067 L2 - HORIZONTAL LASER-BEAMS; DIELECTRIC SPHERE; FORCE; LEVITATION; VORTEX; LIGHT; MICROPARTICLES SO - Physical Review A 2002 ;66(6): 5451 UI - 11763 AU - Garcia-Banuelos J AU - Siller-Lopez F AU - Miranda A AU - Aguilar LK AU - guilar-Cordova E AU - rmendariz-Borunda J AD - Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Guadalajara 44281, Jalisco, MexicoAdvantagene Inc, San Diego, CA, USAHarvard Gene Therapy Initiat, Boston, MA, USAArmendariz-Borunda, J, Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Apdo Postal 2-123, Guadalajara 44281, Jalisco, Mexico TI - Cirrhotic rat livers with extensive fibrosis can be safely transduced with clinical-grade adenoviral vectors. Evidence of cirrhosis reversion AB - Adenoviral vectors efficiently target normal liver cells; however, a clear-cut description of the safety boundaries for using adenovectors in hepatic cirrhosis has not been settled. With this in mind, we used a first-generation, replication-deficient adenoviral vector carrying the E. coli lacZ gene (Ad5betaGal) to monitor therapeutic range, biodistribution, toxicity and transduction efficiency in Wistar rats made cirrhotic by two different experimental approaches resembling alcoholic cirrhosis and biliary cirrhosis in humans. Further, we show proof of concept on fibrosis reversion by a 'therapeutic' Ad-vector (AdMMP8) carrying a gene coding for a collagen-degrading enzyme. Dose-response experiments with Ad5betaGal ranging from 1 x 10(8)-3 x 10(12) viral particles (vp) per rat (250 g), demonstrated that adenovirus-mediated gene transfer via iliac vein at 3 x 10(11) vp/rat, resulted in an approximately 40% transduction in livers of rats made cirrhotic by chronic intoxication with carbon tetrachloride, compared with approximately 80% in control non-cirrhotic livers. In rats made cirrhotic by bile-duct obstruction only, 10% efficiency of transduction was observed. Biodistribution analyses showed that vector expression was detected primarily in liver and at a low level in spleen and kidney. Although there was an important increase in liver enzymes between the first 48 h after adenovirus injection in cirrhotic animals compared to non-transduced cirrhotic rats, this hepatic damage was resolved after 72-96 h. Then, the cDNA for neutrophil collagenase, also known as Matrix Metalloproteinase 8 (MMP8), was cloned in an Ad-vector and delivered to cirrhotic rat livers being able to reverse fibrosis in 44%. This study demonstrates the potential use of adenoviral vectors in safe transient gene therapy strategies for human liver cirrhosis MH - Mexico|Jalisco MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 27 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0969-7128 UR - ISI:000173886200006 L2 - cirrhosis;gene transfer;safety;fibrosis reversion;MEDIATED GENE-TRANSFER; HEPATIC FIBROGENESIS; I COLLAGEN; EXPRESSION; CELLS; BETA; MECHANISMS; DELIVERY; THERAPY; VITRO SO - Gene Therapy 2002 ;9(2):127-134 5452 UI - 11486 AU - Garcia-Barreto JA AU - Franco J AU - Rudnick L AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Minnesota, Dept Astron, Minneapolis, MN 55455, USAGarcia-Barreto, JA, Natl Autonomous Univ Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - VLA high-resolution 1.4 and 8.4 GHz mapping of the barred galaxy NGC 3367 AB - We report new radio continuum observations with an angular resolution of 2."1 at 1.4 GHz (20 cm) and 0."28 at 8.4 GHz (3.6 cm) of the barred galaxy NGC 3367. In the map at 1.4 GHz, the central nuclear region connects to the southwest lobe, with a projected structure at a position angle (P.A.) of similar to230degrees, forming a jetlike structure. The map at 8.4 GHz shows a compact unresolved source (smaller than 65 pc in diameter) associated with emission from the nucleus and several compact sources located within a radius of about 300 pc, forming a circumnuclear structure. The compact core, jet, and lobes form a small, low-power counterpart to radio galaxies, with a flow axis that is out of the plane of the galaxy. The flow axis (P.A. similar to230degrees) coincides with the P.A. of the major axis of the galaxy and is thus inclined to the rotation axis of the disk. In addition, the flow axis differs by about 20degrees from the major axis of the stellar bar. Assuming that the stellar bar rotates counterclockwise (i.e., assuming trailing spiral arms), this difference in angle is taken as an argument in favor of having the jetlike structure out of the plane of the disk and not associated with the stellar bar MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000174756400008 L2 - galaxies : clusters : individual (NGC 3367);galaxies : ISM;galaxies : jets;galaxies : starburst;RADIO-CONTINUUM OBSERVATIONS; EXTRAGALACTIC IRAS SOURCES; SEYFERT-GALAXIES; SPIRAL GALAXIES; STARBURST RING; NUCLEAR RING; IONIZED-GAS; EMISSION; NGC-7469; SAMPLE SO - Astronomical Journal 2002 ;123(4):1913-1921 5453 UI - 8968 AU - Garcia-Becerra R AU - Borja-Cacho E AU - Cooney AJ AU - Jackson KJ AU - Lemus AE AU - Perez-Palacios G AU - Larrea F AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoBaylor Coll Med, Dept Mol & Cellular Biol, Houston, TX 77030, USAUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Sch Med, Gen Hosp, Mexico City 06726, DF, MexicoLarrea, F, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Quiroga 15, Mexico City 14000, DF, Mexico TI - The intrinsic transcriptional estrogenic activity of a non-phenolic derivative of levonorgestrel is mediated via the estrogen receptor-alpha AB - Levonorgestrel (LNG), a 19-nor-testosterone derivative, is widely used in contraceptive formulations. This compound does not bind to the estrogen receptor (ER), but it shows estrogen-like effects under in vivo and in vitro conditions. The estrogenicity of LNG may be attributed to its bio-transformation into non-phenolic metabolites. In this study, the ability of A-ring reduced LNG metabolites to activate transcription via an estrogenic mechanism of action, including differences between ERalpha and ERbeta subtypes, were investigated. Transactivation assays were performed in HeLa cells transfected with expression vectors for ERalpha and ERbeta and an estrogen-responsive reporter gene. Cells were also transfected with expression vectors for both progesterone receptor (PR) isoforms (A or 13). As expected, the tetrahydro, derivatives of LNG (3alpha,5alpha- and 3beta,5alpha-LNG) showed significantly lower PR-mediated transcriptional activities through both isoforms when compared with progesterone (P-4) and LNG. In contrast, the 3beta,5alpha-tetrahydro derivative resulted in a significant activation of estrogen-dependent gene transcription. This effect was selectively confined to the ERalpha, since little if any activity could be observed with the ERbeta and no antagonistic activities were demonstrated. This study provides structural and molecular clues for the well documented in vitro and in vivo intrinsic estrogenicity of 19-nor-testosterone-derived progestins and ligand requirements for ERalpha recognition. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0960-0760 UR - ISI:000181412100008 L2 - estrogen receptors;estrogen effects;levonorgestrel;synthetic progestins;transcription regulation;RING REDUCED METABOLITES; BREAST-CANCER; CONTRACEPTIVE PROGESTIN; TARGET ORGANS; IN-VITRO; NORETHISTERONE; BETA; MECHANISM; BINDING; GESTODENE SO - Journal of Steroid Biochemistry and Molecular Biology 2002 ;82(4-5):333-341 5454 UI - 9673 AU - Garcia-Calderon G AU - Villavicencio J AU - Delgado F AU - Muga JG AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoUniv Pais Vasco, Dept Quim Fis, EHU, E-48080 Bilbao, SpainGarcia-Calderon, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Time scale of forerunners in quantum tunneling AB - The forerunners preceding the main tunneling signal of the wave created by a source with a sharp onset or by a quantum shutter have been generally associated with over-the-barrier (nontunneling) components. We demonstrate that, while this association is true for distances that are larger than the penetration length, for smaller distances the forerunner is dominated by under-the-barrier components. We find that its characteristic arrival time is inversely proportional to the difference between the barrier energy and the incidence energy, a tunneling time scale different from both the phase time and the Buttiker-Landauer time MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000179502200029 L2 - FRONT PROPAGATION; EVANESCENT MEDIA; TRAVERSAL TIME; TRANSIENT; DEPENDENCE; BARRIER SO - Physical Review A 2002 ;66(4): 5455 UI - 8152 AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Rosas J AU - Pallares L AU - Calvo-Alen J AU - Garcia-Carrasco A AU - Cervera R AU - Font J AU - Ingelmo M AD - BUAP, Puebla, MexicoHosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainHosp Vila Joiosa, Rheumatol Unit, Alicante, SpainHosp Son Dureta, Palma de Mallorca, SpainHosp Sierrallana, Rheumatol Unit, Santander, Spain TI - Primary Sjogren's syndrome with ANA(+) and negative Anti-Ro/La antibodies (ANA+/ENA-) MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800977 SO - Arthritis and Rheumatism 2002 ;46(9):S366-S366 5456 UI - 8153 AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Gil V AU - Claver G AU - Brito MP AU - Belenguer R AU - Garcia-Carrasco A AU - Cervera R AU - Font J AU - Ingelmo M AD - BUAP, Puebla, MexicoHosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, Spain TI - Primary Sjogren's syndrome and hypogammaglobulinemia MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800978 SO - Arthritis and Rheumatism 2002 ;46(9):S367-S367 5457 UI - 8154 AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Rosas J AU - Calvo-Alen J AU - Pallares L AU - Belenguer R AU - Cervera R AU - Font J AU - Ingelmo M AD - BUAP, Puebla, MexicoHosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainHosp Vila Joiosa, Rheumatol Unit, Alicante, SpainHosp Sierrallana, Rheumatol Unit, Santander, SpainHosp Son Duerta, Palma de Mallorca, Spain TI - Primary Sjogren's syndrome with Sicca-Limited disease: Analysis of 400 patients MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800982 SO - Arthritis and Rheumatism 2002 ;46(9):S368-S368 5458 UI - 8158 AU - Garcia-Carrasco M AU - Jara LJ AU - Brito MP AU - Ramos-Casala M AU - Halperin I AU - Cervera R AU - Font J AU - Ingelmo M AD - BUAP, Puebla, MexicoIMSS, Hosp Especialidades CMN La Raza, Clin Res Unit, Mexico City, DF, MexicoHosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainHosp Clin Barcelona, Dept Endocrinol, Barcelona, Spain TI - Subclinical thyroid disease in patients with systemic lupus erythematosus: Analysis of 266 patients without previous evidence of thyroid involvement MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421801194 SO - Arthritis and Rheumatism 2002 ;46(9):S442-S443 5459 UI - 10768 AU - Garcia-Carreno FL AU - buquerque-Cavalcanti C AU - del Toro MAN AU - Zaniboni E AD - Ctr Invest Biol, Sel Noroese, La Paz 23000, MexicoUniv Fed Santa Catarina, BR-88040900 Florianopolis, SC, BrazilGarcia-Carreno, FL, Ctr Invest Biol, Sel Noroese, Apartado Postal 128, La Paz 23000, Mexico TI - Digestive proteinases of Brycon orbignyanus (Characidae, Teleostei): characteristics and effects of protein quality AB - Juvenile piracanjuba, Brycon orbignyanus, in the wild consume protein from both plant and animal sources. Digestion of protein in piracanjuba begins in the stomach with pepsin, at low pH, and is followed by hydrolysis at alkaline pH in the lumen of the intestine. The digestive system in piracanjuba was evaluated to characterize the enzymes responsible for the digestion of feed protein and their composition. The gastric tissue synthesizes pepsin and the intestine tissues trypsin and chymotrypsin. Operational variables were evaluated and defined for future studies of the digestive system physiology. The enzymatic activity in the intestine and the relative concentration of enzymes were heavily influenced by the composition of the feed and the feeding regime, as detected by substrate-SDS-PAGE. Piracanjuba possess a mechanism of enzyme adaptation responding to food quality and regime, by varying the amount and composition of digestive proteases. This is a requisite study to determine the enzymes digesting protein in food and their characteristics and to gain some clues about the possible regulation mechanisms of enzyme synthesis in piracanjuba. (C) 2002 Elsevier Science Inc. All rights reserved MH - Brazil MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 1096-4959 UR - ISI:000176788200005 L2 - fish digestive system;proteinases;protein digestion;SUBSTRATE-GEL-ELECTROPHORESIS; IN-VITRO; PROTEASES; DIGESTIBILITY; RABBITFISH; INHIBITORS; ENZYMES SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2002 ;132(2):343-352 5460 UI - 10973 AU - Garcia-Compean H AU - Plebanski JF AU - Przanowski M AU - Turrubiates FJ AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoTech Univ Lodz, Inst Phys, PL-93005 Lodz, PolandGarcia-Compean, H, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Deformation quantization of geometric quantum mechanics AB - Second quantization of a classical nonrelativistic one-particle system as a deformation quantization of the Schrodinger spinless field is considered. Under the assumption that the phase space of the Schrodinger field is C-infinity, both the Weyl-Wigner-Moyal and Berezin deformation quantizations are discussed and compared, Then the geometric quantum mechanics is also quantized using the Berezin method under the assumption that the phase space is CPinfinity endowed with the Fubini-Study Kahlerian metric. Finally, the Wigner function for an arbitrary particle state and its evolution equation are obtained. As is shown this new 'second quantization' leads to essentially different results than the former one. For instance, each state is an eigenstate of the total number particle operator and the corresponding eigenvalue is always 1/h MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176009900014 L2 - KAHLER-MANIFOLDS; FIELD-THEORY; PHASE-SPACE SO - Journal of Physics A-Mathematical and General 2002 ;35(19):4301-4319 5461 UI - 9627 AU - Garcia-de los Santos A AU - Morales A AU - Baldoma L AU - Clark SRD AU - Brom S AU - Yost CK AU - Hernandez-Lucas I AU - Aguilar J AU - Hynes MF AD - Univ Calgary, Dept Biol Sci, Calgary, AB T2N 1N4, CanadaUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca 62191, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Ecol Mol & Microbiana, Cuernavaca 62191, Morelos, MexicoUniv Barcelona, Fac Farm, Dept Bioquim, E-08028 Barcelona, SpainHynes, MF, Univ Calgary, Dept Biol Sci, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada TI - The glcB locus of Rhizobium leguminosarum VF39 encodes an arabinose-inducible malate synthase AB - In the course of a study conducted to isolate genes upregulated by plant cell wall sugars, we identified an arabinose-inducible locus from a transcriptional fusion library of Rhizobium leguminosarum VF39, carrying random insertions of the lacZ transposon Tn5B22. Sequence analysis of the locus disrupted by the transposon revealed a high similarity to uncharacterized malate synthase G genes from Sinorhizobium meliloti, Agrobacterium tumefaciens, and Mesorhizobium loti. This enzyme catalyzes the condensation of glyoxylate and acetyl-CoA to yield malate and CoA and is thought to be a component of the glyoxylate cycle, which allows microorganisms to grow on two carbon compounds. Enzyme assays showed that a functional malate synthase is encoded in the gIcB gene of R. leguminosarum and that its expression is induced by arabinose, glycolate, and glyoxylate. An Escherichia coli aceB glcB mutant, complemented with the R. leguminosarum PCR-amplified gene, recovered malate synthase activity. A very similar genome organization of the loci containing malate synthase and flanking genes was observed in R. leguminosarum, S. meliloti, and A. tumefaciens. Pea plants inoculated with the glcB mutant or the wild-type strain showed no significant differences in nitrogen fixation. This is the first report regarding the characterization of a mutant in one of the glyoxylate cycle enzymes in the rhizobia MH - Canada MH - Mexico|Morelos MH - Spain PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000179744300008 L2 - Rhizobium;malate synthase;glyoxylate cycle;arabinose metabolism;GRAM-NEGATIVE BACTERIA; INVITRO INSERTIONAL MUTAGENESIS; ESCHERICHIA-COLI; MOLECULAR CHARACTERIZATION; CLONING; GENE; GLYOXYLATE; PLASMID; OPERON; ENZYME SO - Canadian Journal of Microbiology 2002 ;48(10):922-932 5462 UI - 10400 AU - Garcia-Esquivel Z AU - Bricelj VM AU - Felbeck H AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoNatl Res Council Canada, Inst Marine Biosci, Halifax, NS B3H 3Z1, CanadaUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USAGarcia-Esquivel, Z, Univ Autonoma Baja California, Inst Invest Oceanol, Apdo Postal 453, Ensenada, Baja California, Mexico TI - Metabolic depression and whole-body response to enforced starvation by Crassostrea gigas postlarvae AB - Physiological and biochemical measurements were performed on six oyster (Crassostrea gigas) cohorts, in order to: (a) investigate the whole-body response (growth, energy content, metabolic and excretion rates) of 2-week-old postlarvae (spat) to enforced (0-8 days) starvation, and (b) test the potential use of three aerobic enzyme systems as indices of physiological condition. Starvation resulted in exponential reduction of postlarval metabolic and excretion rates, as well as a linear decrease in enzyme activity. These response mechanisms effectively limited the loss of endogenous reserves after 2 days of starvation and maintained the oyster's functional integrity over prolonged (8 days) starvation. Proteins appeared to be selectively conserved during short-term (2 days) starvation, as suggested by a decrease in total protein content, while maintaining constant weight-specific enzyme activity. Postlarvae starved for 2 days exhibited relatively higher lipid losses, lower mortality and lower metabolism than metamorphosing stages, thus suggesting a greater buffering capacity to starvation in the former. The activity of the electron transport system may be a useful indicator of long-term stress or developmental condition of oyster postlarvae, while citrate synthase and cytochrome oxidase could be used as indicators of growth rate. None of these enzyme systems is recommended as an index of aerobic metabolism during short-term starvation. (C) 2002 Elsevier Science Inc. All rights reserved MH - Canada MH - Mexico|Baja California MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Physiology;Zoology U5 - J;Article AV - English IS - 1095-6433 UR - ISI:000177608500006 L2 - aerobic enzymes;Crassostrea gigas;cytochrome oxidase;energetics;excretion;metabolic depression;oyster;starvation;ELECTRON-TRANSPORT-SYSTEM; ENERGY RESERVES; MYTILUS-EDULIS; JUVENILE DEVELOPMENT; BIOCHEMICAL-CHANGES; NUTRITIONAL-STATUS; ENZYME-ACTIVITIES; PROTEIN-SYNTHESIS; VIRGINICA GMELIN; PACIFIC OYSTER SO - Comparative Biochemistry and Physiology A-Molecular and Integrative Physiology 2002 ;133(1):63-77 5463 UI - 10555 AU - Garcia-Ferreira S AU - Gutev V AU - Nogura T AU - Sanchis M AU - Tomita A AD - Inst Matemat, Morelia 58000, Michoacan, MexicoUniv Natal, Fac Sci, Sch Math & Stat Sci, ZA-4041 Durban, South AfricaEhime Univ, Fac Sci, Dept Math, Matsuyama, Ehime 7908577, JapanUniv Jaume 1, Dept Matemat, Castellon 12071, SpainUniv Sao Paulo, Dept Math, Inst Matemat & Estatist, Sao Paulo, BrazilGarcia-Ferreira, S, Inst Matemat, Nicolas Romero 150, Morelia 58000, Michoacan, Mexico TI - Extreme selections for hyperspaces of topological spaces AB - We study properties of Hausdorff spaces X which depend on the variety of continuous selections for their Vietoris byperspaces F(X) of closed non-empty subsets. Involving extreme selections for F(X), we characterize several classes of connected-like spaces. In the same way, we also characterize several classes of disconnected-like spaces, for instance all countable scattered metrizable spaces. Further, involving another type of selections for F(X), we study local properties of X related to orderability. In particular, we characterize some classes of orderable spaces with only one non-isolated point. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Japan MH - Mexico|Michoacan MH - South Africa MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000177061300013 L2 - hyperspace topology;Vietoris topology;continuous selection;p-maximal selection;p-minimal selection;DISCONNECTEDNESS SO - Topology and Its Applications 2002 ;122(1-2):157-181 5464 UI - 10954 AU - Garcia-Ferreira S AU - Nogura T AD - Inst Matemat, Morelia, Michoacan, MexicoEhime Univ, Matsuyama, Ehime 790, JapanGarcia-Ferreira, S, Inst Matemat, Morelia, Michoacan, Mexico TI - Proceedings of the First Joint Japan-Mexico Meeting in Topology - 7-10 July 1999, Morelia, Mexico - Preface MH - Japan MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Editorial Material AV - English IS - 0166-8641 UR - ISI:000176081400001 SO - Topology and Its Applications 2002 ;121(1-2):1-1 5465 UI - 10464 AU - Garcia-Franco F AU - Munoz MD AU - Lozano-Fuentes S AU - Fernandez-Salas I AU - Garcia-Rejon J AU - Beaty BJ AU - Black WC AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Entomol Med, San Nicolas De Las Garza, Monterrey, MexicoUniv Autonoma Yucatan, Lab Arbovirol, Merida, Yucatan, MexicoColorado State Univ, Dept Microbiol, Ft Collins, CO 80523, USAMunoz, MD, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Large genetic distances among Aedes aegypti populations along the south Pacific coast of Mexico AB - A population genetic analysis was conducted among 20 Aedes aegypti collections from 19 cities along the south Pacific coast in the Mexican states of Guerrero, Oaxaca, and Chiapas and in Coatepeque, Guatemala. Genetic variation was scored at 131 random amplified polymorphic DNA loci. The amount of genetic differentiation among collections was similar to3 times as great as detected among collections in an earlier study in northeastern Mexico. Regression analysis of linear or road distances on linearized F-ST indicated that collections are genetically isolated by distance. Cluster analysis failed to group collections in geographic proximity, and there was as much genetic variation among collections 60 km apart as there was among all collections (similar to900-km range). The large genetic differentiation in southern Mexico reflects reduced gene flow among mosquitoes arising in a greater diversity of habitats and altitudes than exists among northeastern collections. It is likely that dispersal via human commerce in the northeast confounds patterns of natural gene flow MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|Yucatan MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000177501000027 L2 - PUERTO-RICO; MARKERS; MOSQUITO SO - American Journal of Tropical Medicine and Hygiene 2002 ;66(5):594-598 5466 UI - 9815 AU - Garcia-Garcia MD AU - Ponce-de-Leon A AU - Garcia-Sancho MC AU - Ferreyra-Reyes L AU - Palacios-Martinez M AU - Fuentes J AU - Kato-Maeda M AU - Bobadilla M AU - Small P AU - Sifuentes-Osornio J AD - Inst Nacl Salud Publ Ave, Unidad TB, Cuernavaca 62508, Morelos, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoInst Nacl Enfermedades Resp, Mexico City, DF, MexicoSecretaria Salud Estado Veracruz, Xalapa, Veracruz, MexicoStanford Univ, Palo Alto, CA 94304, USAGarcia-Garcia, MD, Inst Nacl Salud Publ Ave, Unidad TB, Univ 655,Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Tuberculosis-related deaths within a well-functioning DOTS control program AB - To describe the molecular epidemiology of tuberculosis (TB)-related deaths in a well-managed program in a low-HIV area, we analyzed data from a cohort of 454 pulmonary TB patients recruited between March 1995 and October 2000 in southern Mexico. Patients who were sputum acid-fast bacillus smear positive underwent clinical and mycobacteriologic evaluation (isolation, identification, drug-susceptibility testing, and IS6110-based genotyping and spoligotyping) and received treatment from the local directly observed treatment strategy (DOTS) program. After an average of 2.3 years of follow-up, death was higher for clustered cases (28.6 vs. 7%, p=0.01). Cox analysis revealed that TB-related mortality hazard ratios included treatment default (8.9), multidrug resistance (5.7), recently transmitted TB (4.1), weight loss (3.9), and having less than 6 years of formal education (2). In this community, TB is associated with high mortality rates MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Veracruz MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 10 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000179307700026 L2 - RURAL SOUTH-AFRICA; POSITIVE PULMONARY TUBERCULOSIS; DRUG-RESISTANT TUBERCULOSIS; DIRECTLY OBSERVED THERAPY; MYCOBACTERIUM-TUBERCULOSIS; MORTALITY; MEXICO; EPIDEMIOLOGY; CHEMOTHERAPY; COUNTRIES SO - Emerging Infectious Diseases 2002 ;8(11):1327-1333 5467 UI - 11787 AU - Garcia-Lopez JH AU - Aboites V AU - Kir'yanov AV AU - Holmgren S AU - Damzen MJ AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, EnglandGarcia-Lopez, JH, Ctr Invest Opt, Lomas Bosque 115, Leon 37150, Gto, Mexico TI - Experimental study and modelling of a diode-side-pumped Nd : YVO4 laser AB - The design of three cavities for a solid-state Nd:YVO4 laser side-pumped by a diode laser is presented as well as the theoretical model and computed simulation developed to describe each system. The computed results are compared with the experiments demonstrating to be in accordance with each other. It is found that an elliptical cavity provides the best balance between the laser power and quality of a transversal beam profile. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000173827000023 L2 - EFFICIENT SO - Optics Communications 2002 ;201(4-6):425-430 5468 UI - 10082 AU - Garcia-Mendez M AU - Elizondo-Villarreal N AU - Farias MH AU - Hirata GA AU - Beamson G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoDaresbury Lab, Warrington WA4 4AD, Cheshire, EnglandUANL, Fac Ciencias Fis Matemat, San Nicolas Los Garza 66450, NL, MexicoFarias, MH, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Chemical and structural characterization of Co-Ni silicide thin films AB - By means of pulsed laser deposition we prepared Co-Ni/p-Si thin films upon a Si(100) substrates. Samples were thermally treated in vacuum in order to promote silicide formation. Rom X-ray photoelectron spectroscopy (XPS) analysis, we detected chemical shifts of the Co2p and Ni2p transitions, characteristic of silicide binding energy, at the respective ranges of 778.3-778.6 and 853.2-853.6 eV. By means of high resolution transmission electron microscopy (HRTEM) we identified some nanocrystalline regions belonging to CoSi2, Ni2Si and NiSi2 structures. We also appreciate that the resulting films are of a polycrystalline nature MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Nuevo Leon MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400011 L2 - SI SYSTEM; COBALT; NICKEL; GROWTH SO - Surface Review and Letters 2002 ;9(5-6):1661-1666 5469 UI - 9675 AU - Garcia-Mendoza E AU - Matthijs HCP AU - Schubert H AU - Mur LR AD - Univ Amsterdam, IBED, AMB, NL-1018 WS Amsterdam, NetherlandsUniv Greifswald, Inst Ecol, Greifswald, GermanyGarcia-Mendoza, E, CICESE, Dept Ecol, Ensenada, Baja California, Mexico TI - Non-photochemical quenching of chlorophyll fluorescence in Chlorella fusca acclimated to constant and dynamic light conditions AB - Non-photochemical quenching of chlorophyll fluorescence (NPQ) involves dissipation of light energy in the photosynthetic apparatus via a number of physiologically distinct processes. The relationships among NPQ, the (de)epoxidation state of the xanthophyll cycle pigments and state transitions was studied in the green alga Chlorella fusca, acquired from six differently light-acclimated continuous cultures. A 10 h light and 14 h darkness, periodicity was obeyed in all cultures. Three cultures received a high total daily irradiance, three others a low one. High and low irradiances were each dosed in three different modes at constant supply, with sine shape intensity modulation, or as a sine with superimposed oscillations. In the constant supply mode, but not for the sine and oscillating modes, high-light rendered a three-fold higher xantophyll cycle pigment content than low-light. Dynamic interconversion of xantophyll cycle pigments was restricted to high-light cultures. NPQ followed the kinetics of the light supply mode and was highest in high light cultures. In low-light cultures, NPQ correlated mainly to state transitions. These observations were supported by experiments with dithiothreithol-treated samples. The relative impact of xantophyll cycle operation and state transitions on NPQ in green algae from different light climates will be discussed with reference to higher plants MH - Germany MH - Mexico|Baja California MH - Netherlands PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences U5 - J;Article AV - English IS - 0166-8595 UR - ISI:000179498600007 L2 - Chlorella fusca;dynamic light conditions;green algae;non-photochemical quenching;photoacclimation;state transitions;xanthophyll cycle;XANTHOPHYLL-CYCLE; UNICELLULAR ALGAE; PHOTOSYSTEM-II; ZEAXANTHIN; LEAVES; PLANTS; ENERGY; PHOTOPROTECTION; PHOTOSYNTHESIS; VARIABILITY SO - Photosynthesis Research 2002 ;74(3):303-315 5470 UI - 11446 AU - Garcia-Pacheco G AU - Cabanas-Moreno JG AU - Cruz-Gandarilla F AU - Yee-Madeira H AU - Umemoto M AD - Inst Politecn Nacl, Mexico City 07300, DF, Mexico. Toyohashi Univ Technol, Toyohashi, Aichi 441, Japan TI - Production of nanostructured CoO, Co3O4 and NiO particles by mechanically induced reactions AB - In the present work, the oxidation reactions: CO + (1)/O-2(2) --> CoO, 3CoO + (1)/O-2(2) --> Co3O4 and Ni + (1)/O-2(2) --> NiO were induced by mechanical milling. These oxidation reactions were carried out under air atmosphere and with the addition of methanol as a process control agent to avoid excessive agglomeration of the original metallic powders. Characterization of product phases has been done using x-ray diffraction, scanning electron microscopy, transmission electron microscopy and microanalysis by energy dispersive x-ray spectrometry. Oxidation of cobalt produced CoO and CO3O4 phases; the addition of methanol delayed the formation of the CO3O4 phase. For nickel, the product phases were NiO and a residual amount of Ni. Cobalt powders were more easily oxidized than Ni powders, probably as a result of their smaller initial particle size. The resulting crystallites in the oxide particle had sizes smaller than 20nm in both cases MH - Japan MH - Mexico|Distrito Federal T3 - METASTABLEMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle2BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBT98Y AV - English IS - 0255-5476 UR - ISI:000174657900042 L2 - mechanochemical reactions;nanocrystals;transition metal oxides SO - 2002 ;():281-286 5471 UI - 10146 AU - Garcia-Tovar CG AU - Luna J AU - Mena R AU - Soto-Zarate CI AU - Cortes R AU - Perez A AU - Leon-Avila G AU - Mornet D AU - Rendon A AU - Hernandez JM AD - IPN, CINVESTAV, Dept Cell Biol, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07360, DF, MexicoFES Cuautitlan, Morphol Unit, Cuautitlan, MexicoINSERM, U128, IFR 24, Montpellier, FranceINSERM, Strasbourg, FranceHernandez, JM, IPN, Dept Biol Celular, Ctr Invest & Estudios Avanzados, Av IPN 2508 Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Dystrophin isoform Dp71 is present in lamellipodia and focal complexes in human astrocytoma cells U-373 MG AB - Dp71 is the most abundant product of the dmd gene in the brain. There are at least 2 isoforms derived from alternative splicing of exon 78 (Dp71d, which contains exon 78 and Dp71f, the spliced isoform) but the precise localization and function of each isoform is still unknown. In the present study, we demonstrate by RT-PCR that the Dp71f isoform is present in an astrocytoma cell line U-373 MG, and its subcellular localization was determined in the cytoplasm, particularly in perinuclear areas, with lower amounts towards the periphery but increasing in the leader borders of lamellipodia and focal complexes. Double labeling indirect immunofluorescence showed that Dp71f colocalized with actin-like beta-dystroglycan and beta-1 integrin. We also demonstrated by triple labeling that Dp71f was colocalized with actin and two members of integrin complexes, alpha-actinin and vinculin, in focal complexes. Ventral plasma membranes were enriched and in those containing focal complex proteins, we found colocalization of Dp71f, actin and vinculin. It is concluded that U-373 MG cells express Dp71f as part of lamellipodia and focal complex proteins, and possibly connected via distroglycan complexes to integrin complexes MH - France MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Cell Biology U5 - J;Article AV - English IS - 0065-1281 UR - ISI:000178430800004 L2 - Dp71f;dystrophin;glycoprotein complex;integrin complex;cell adhesion;GLYCOPROTEIN-BINDING-SITE; MULLER GLIAL-CELLS; MUSCULAR-DYSTROPHY; SUBCELLULAR-LOCALIZATION; SARCOGLYCAN COMPLEX; EPSILON-SARCOGLYCAN; BETA-DYSTROGLYCAN; ALPHA-SARCOGLYCAN; DIFFERENTIAL DISTRIBUTION; MOLECULAR-ORGANIZATION SO - Acta Histochemica 2002 ;104(3):245-254 5472 UI - 10619 AU - Garcia-Valenzuela A AU - Pena-Gomar MC AU - Fajardo-Lira C AD - Univ Nacl Autonoma Mexico, Lab Opt Aplicada, Ctr Instrumentos, Mexico City 04510, DF, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoCalif State Univ Northridge, Family Environm Sci Dept, Northridge, CA 91330, USAGarcia-Valenzuela, A, Univ Nacl Autonoma Mexico, Lab Opt Aplicada, Ctr Instrumentos, Ciudad Univ,Apdo Postal 70-168, Mexico City 04510, DF, Mexico TI - Measuring and sensing a complex refractive index by laser reflection near the critical angle AB - We analyze the use of laser reflection near the critical angle for different refractometric measurements. We consider using dynamic reflectometry to obtain direct measurements of the angle differential of the reflectivity. From the angular profile of the differential reflectivity it is possible to obtain measurements of the absolute values of the real and imaginary parts of the refractive index (RI). For sensing purposes we consider monitoring the reflectance and/or its angular derivative near the critical angle for high-resolution sensing. We give simple and general formulas to estimate the resolution of the different measurements and give some estimates based on our experimental system. We show that a single instrument may be able to measure the real and imaginary parts of the RI with an uncertainty in the order of 10(-6). In sensing variations of the RI, the same instrument may yield a resolution of the order of 10(-7) for slow variations. However, if the RI is modulated harmonically in time, the same instrument might detect an amplitude of modulation as low as similar to10(-10). In addition, we study the applicability of the technique to turbid media consisting of particles in suspension. We illustrate the potential of the technique for that application with a few experiments on liquid milk and on water suspensions of polystyrene particles. We give experimental evidence showing it is possible to sense the physical state of particles in solution even when the particles have a diameter as large as the wavelength. We also show that the RI of a liquid sample can be monitored through a physical or chemical process even if the liquid is vigorously stirred. (C) 2002 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000177021900036 L2 - refractometry;complex index of refraction;critical angle;modulated techniques;high resolution;turbid media;particle suspension;REFRACTOMETRY; BEAM; SENSOR SO - Optical Engineering 2002 ;41(7):1704-1716 5473 UI - 10835 AU - Garcia-Varela M AU - Cummings MP AU - de Leon GPP AU - Gardner SL AU - Laclette JP AD - Inst Invest Biomed, Dept Immunol, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Dept Biol, Inst Biol, Mexico City 04510, DF, MexicoJosephine Bay Paul Ctr Comparat Mol Biol & Evolut, Biol Marine Lab, Woods Hole, MA 02543, USAUniv Nebraska, Harold W Manter Lab Parasitol, Lincoln, NE 68588, USALaclette, JP, Inst Invest Biomed, Dept Immunol, Mexico City, DF, Mexico TI - Phylogenetic analysis based on 18S ribosomal RNA gene sequences supports the existence of class polyacanthocephala (acanthocephala) AB - Members of phylum Acanthocephala are parasites of vertebrates and arthropods and are distributed worldwide. The phylum has traditionally been divided into three classes, Archiacanthocephala, Palaeacanthocephala, and Eoacanthocephala; a fourth class, Polyacanthocephala, has been recently proposed. However. erection of this new class, based on morphological characters, has been controversial. We sequenced the near complete 18S rRNA gene of Polyacanthorhynchus caballeroi (Polyacanthocephala) and Rhadinorhynchus sp. (Palaeacanthocephala);, these sequences were aligned with another 21 sequences of acanthocephalans representing the three widely recognized classes of the phylum and with 16 sequences from outgroup taxa. Phylogenetic relationships inferred by maximum-likelihood and maximum-parsimony analyses showed Archiacatithocephala as the most basal group within the phylum, whereas classes Polyacanthocephala + Eoacanthocephala formed a monophyletic clade, with Palaeacanthocephala as its sister group. These results are consistent with the view of Polyacanthocephala representing an independent class within Acanthocephala. (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000176576100016 L2 - Acanthocephala;18S rRNA;polyacanthocephala;Polyacanthorhynchus caballeroi;NUCLEOTIDE SUBSTITUTION; DNA-SEQUENCES SO - Molecular Phylogenetics and Evolution 2002 ;23(2):288-292 5474 UI - 8684 AU - Garcia Escalante G AU - Gonzalez-Herrera L AU - Castillo-Zapata I AU - Pinto-Escalante D AU - Gonzalez-del Angel A AD - Univ Autonoma Yucatan, Genet Lab, Merida, VenezuelaINP, Dept Invest Genet Humana, Mexico City, DF, Mexico TI - Frequency of deletions in dystrophin gene in Mexican patients with muscular dystrophy Duchenne/Becker and carrier status detection MH - Mexico|Distrito Federal MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000178025801120 SO - American Journal of Human Genetics 2002 ;71(4):364-364 5475 UI - 10494 AU - Garcia E AU - Fernandez JAL AU - De Haro L AU - Tercero F AU - Galocha B AU - Barcia A AU - Besada JL AD - Univ Politecn Madrid, Escuela Tecn Super Ingn Telecomunicac, Grp Radiac, E-28040 Madrid, SpainObserv Astron Nacl, Ctr Astron Yebes, Guadalajara, Jalisco, MexicoGarcia, E, Univ Politecn Madrid, Escuela Tecn Super Ingn Telecomunicac, Grp Radiac, E-28040 Madrid, Spain TI - Design of a common ellipsoidal mirror for the focalization of several radioastronomic bands: New method and application to three bands AB - The design of a common ellipsoidal mirror for the focalization of several radioastronomic bands, by means of a straightforward method, is presented. Three bands centered at 100, 80 and 45 GHz are chosen for the validation of the method. Quasi-optics theory is used to design an optical system that can focalize several bands with the minimum possible optic elements, and also to share the maximum of them. Lenses, mirrors, feeder dimensions and the distances among each component necessaries for the focalization in each band are calculated. The simultaneous design in several radioastronomic observation bands reduces the cost of manufacturing, the total number of optic elements and the density of optical elements on the receiver cabin MH - Mexico|Jalisco MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 0195-9271 UR - ISI:000177347000005 L2 - ellipsoidal mirror;Gaussian beam;quasi-optics;radiotelescope;focalization;GAUSSIAN-BEAM; SYSTEMS; HORNS; FEED SO - International Journal of Infrared and Millimeter Waves 2002 ;23(8):1193-1213 5476 UI - 11198 AU - Garcia E AU - Laquel P AU - Castroviejo M AU - Plasencia J AU - Vazquez-Ramos JM AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Bordeaux, CNRS, UMR 5097, REGER, F-33076 Bordeaux, FranceVazquez-Ramos, JM, Natl Autonomous Univ Mexico, Fac Quim, Dept Bioquim, Ave Univ & Copilco, Mexico City 04510, DF, Mexico TI - Maize replicative alpha-type DNA polymerase: separation of polymerase and primase activities and recognition of primase subunits AB - DNA polymerase and DNA primase activities in the maize alpha-type DNA polymerase 2 were dissociated and DNA polymerase-free DNA primase was studied. DNA primase synthesized primers that were 8-34 nucleotides long, with more intense bands at 15-17 nucleotides in length. DNA polymerase 1 (a putative delta-type enzyme) or DNA polymerase 2 were assayed after template-priming with purified DNA primase and showed a differential use of templates: whereas DNA polymerase 2 used a polydT template more efficiently than a natural template, DNA polymerase 1 used both of them poorly. The molecular size of DNA primase was estimated to be 68 kDa by gel filtration, western blotting and by a DNA primase 'trapping' assay MH - France MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9317 UR - ISI:000175376200005 L2 - CATALYTIC SUBUNIT; BINDING-PROTEIN; WHEAT EMBRYOS; CELL-CYCLE; PURIFICATION; DNA-POLYMERASE-2; IDENTIFICATION; DELTA; PROCESSIVITY; GERMINATION SO - Physiologia Plantarum 2002 ;114(4):533-539 5477 UI - 11589 AU - Garcia FG AU - Garcia FG AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - He KL AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Li YS AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko SV AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich B AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zukanovich-Funchal R AD - Univ Sao Paulo, Sao Paulo, BrazilIst Nazl Fis Nucl, Trieste, ItalyUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Roma La Sapienza, Rome, ItalyUniv Michigan, Flint, MI 48502, USAUniv Iowa, Iowa City, IA 52242, USAUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoTel Aviv Univ, IL-69978 Tel Aviv, IsraelPetersburg Nucl Phys Inst, St Petersburg, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyInst Theoret & Expt Phys, Moscow 117259, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst High Energy Phys, Protvino, RussiaFermilab Natl Accelerator Lab, Batavia, IL 60510, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCarnegie Mellon Univ, Pittsburgh, PA 15213, USABogazici Univ, TR-80815 Bebek, Istanbul, TurkeyBall State Univ, Muncie, IN 47306, USAGarcia, FG, Univ Sao Paulo, Sao Paulo, Brazil TI - Hadronic production of Lambda c from 600 GeV/c pi(-), Sigma(-) and p beams AB - We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for (&ULambda;) over bar((c)) over bar compared to Lambda(c)(+) as a function of x(F), and on p(t)(2) distributions for Lambda(c)(+). These data were measured in the same apparatus using incident pi(-),Sigma(-) beams at 600 GeV/c and proton beam at 540 GeV/c. The asymmetry is studied as a function of x(F). In the forward hemisphere with x(F) greater than or equal to 0.2 both baryon beams exhibit very strong preference for producing charm baryons rather than charm antibaryons, while the pion beam asymmetry is much smaller. In this energy regime the results show that beam fragments play a major role in the kinematics of Lambda(c) formation, as suggested by the leading quark picture. (C) 2002 Published by Elsevier Science B.V MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000174402400005 L2 - CROSS-SECTIONS; D-S; ASYMMETRIES; NUCLEI; MESON; CHARM SO - Physics Letters B 2002 ;528(1-2):49-57 5478 UI - 9118 AU - Garcia HH AU - Evans CAW AU - Nash TE AU - Takayanagui OM AU - White AC AU - Botero D AU - Rajshekhar V AU - Tsang VCW AU - Schantz PM AU - Allan JC AU - Flisser A AU - Correa D AU - Sarti E AU - Friedland JS AU - Martinez SM AU - Gonzalez AE AU - Gilman RH AU - Del Brutto OH AD - Inst Ciencias Neurol, Cysticercosis Unit, Lima 1, PeruUniv Peruana Cayetano Heredia, Dept Microbiol, Lima, PeruUniv Peruana Cayetano Heredia, Dept Pathol, Lima, PeruUniv Nacl Mayor San Marcos, Sch Vet Med, Lima 14, PeruUniv Cambridge, Sch Clin, Cambridge, EnglandImperial Coll Sci Technol & Med, London, EnglandUniv Salford, Dept Sci Biol, Salford M5 4WT, Lancs, EnglandPfizer Inc, Sandwich, Kent, EnglandNIAID, Parasit Dis Lab, NIH, Bethesda, MD 20892, USAJohns Hopkins Univ, Dept Int Hlth, Sch Hyg & Publ Hlth, Baltimore, MD, USAUniv Sao Paulo, Dept Neurol, Sch Med Ribeirao Preto, BR-14049 Ribeirao Preto, BrazilBaylor Coll Med, Infect Dis Sect, Dept Med, Houston, TX 77030, USAInst Colombiano Med Trop, Medellin, ColombiaChristian Med Coll & Hosp, Dept Neurol Sci, Vellore 632004, Tamil Nadu, IndiaCtr Dis Control, Natl Ctr Infect Dis, Div Parasit Dis, Atlanta, GA 30333, USAUniv Nacl Autonoma Mexico, Sch Med, Mexico City 04510, DF, MexicoInst Nacl Pediat, Secretaria Salud, Mexico City, DF, MexicoInst Nacl Diagnost & Referencia Epidemiol, Secretaria Salud, Mexico City, DF, MexicoHosp Clin Kennedy, Dept Neurol Sci, Guayaquil, EcuadorGarcia, HH, Inst Ciencias Neurol, Cysticercosis Unit, Jr Ancash 1271, Lima 1, Peru TI - Current consensus guidelines for treatment of neurocysticercosis AB - Taenia solium neurocysticercosis is a common cause of epileptic seizures and other neurological morbidity in most developing countries. It is also an increasingly common diagnosis in industrialized countries because of immigration from areas where it is endemic. Its clinical manifestations are highly variable and depend on the number, stage, and size of the lesions and the host's immune response. In pan due to this variability, major discrepancies exist in the treatment of neurocysticercosis. A panel of experts in taeniasis/cysticercosis discussed the evidence on treatment of neurocysticercosis for each clinical presentation, and we present the panel's consensus and areas of disagreement. Overall, four general recommendations were made: (i) individualize therapeutic decisions, including whether to use antiparasitic drugs, based on the number, location, and viability of the parasites within the nervous system; (ii) actively manage growing cysticerci either with antiparasitic drugs or surgical excision; (iii) prioritize the management of intracranial hypertension secondary to neurocysticercosis before considering any other form of therapy; and (iv) manage seizures as done for seizures due to other causes of secondary seizures (remote symptomatic seizures) because they are due to an organic focus that has been present for a long time MH - Brazil MH - Colombia MH - Ecuador MH - United Kingdom MH - India MH - Mexico|Distrito Federal MH - Peru MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 59 U4 - Microbiology U5 - J;Review AV - English IS - 0893-8512 UR - ISI:000181097200010 L2 - TAENIA-SOLIUM CYSTICERCOSIS; SINGLE-DAY PRAZIQUANTEL; GIANT SUBARACHNOID CYSTICERCI; DOUBLE-BLIND TRIAL; SMALL CT LESIONS; CEREBRAL CYSTICERCOSIS; ALBENDAZOLE THERAPY; MEDICAL-TREATMENT; INDIAN PATIENTS; TOMOGRAPHIC LESIONS SO - Clinical Microbiology Reviews 2002 ;15(4):747-+ 5479 UI - 10483 AU - Garcia JJ AU - Brunkan NM AU - Jones WD AD - Univ Rochester, Dept Chem, Rochester, NY 14627, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoJones, WD, Univ Rochester, Dept Chem, Rochester, NY 14627, USA TI - Cleavage of carbon-carbon bonds in aromatic nitriles using nickel(0) AB - The nickel(0) fragment [(dippe)Ni] has been found to react with a variety of aromatic nitriles. Initial pi-coordination to the C=C and CdropN bonds of 2-cyanoquinoline is found to lead ultimately to C-CN oxidative addition. 3-Cyanoquinoline reacts similarly, although no eta(2)-CN complex is observed. 2-, 3-, And 4-cyanopyridines react initially to give eta(2)-nitrile complexes that then lead to quantitative formation of C-CN oxidative addition products. Benzonitrile reacts similarly but undergoes reversible insertion into the Ph-CN bond to give an equilibrium mixture of Ni(II) and Ni(0) adducts. A series of para-substituted benzonitriles has been studied in terms of both the position of the equilibrium between (dippe)Ni(eta(2)-arylnitrile) reversible arrow (dippe)-Ni(CN)(aryl) and the rate of approach to equilibrium, and the Hammett plots indicate a buildup of negative charge at the ipso carbon both in the transition state and the Ni(II) product. Terephthalonitrile gives both eta(2)-nitrile and oxidative addition adducts, as well as dimetalated products. No C-C or C-N cleavage of the aromatic ring is seen with quinoline or acridine; only eta(2)-arene complexes are formed. The structures of many of these compounds are supported by X-ray data MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 39 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000177358600052 L2 - REDUCTIVE ELIMINATION; C-H; COMPLEXES; ACTIVATION; PALLADIUM; FUNCTIONALIZATION; PLATINUM; LIGAND SO - Journal of the American Chemical Society 2002 ;124(32):9547-9555 5480 UI - 9694 AU - Garcia L AU - Hernandez I AU - Sandoval A AU - Salazar A AU - Garcia J AU - Vera J AU - Grijalva G AU - Muriel P AU - Margolin S AU - rmendariz-Borunda J AD - Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Guadalajara 44281, Jalisco, MexicoIPN, CINVESTAV, Dept Farmacol, Mexico City 07738, DF, MexicoMarnac Inc, Dallas, TX 75225, USAArmendariz-Borunda, J, Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Apdo Postal 2-123, Guadalajara 44281, Jalisco, Mexico TI - Pirfenidone effectively reverses experimental liver fibrosis AB - Background/Aims: Our group has been involved in searching for different strategies to ameliorate hepatic cirrhosis. The aim of this study was to evaluate the effect of Pirfenidone in the reversion or prevention of cirrhosis experimentally induced in rats by chronic administration Of CCl4 and bile-duct ligation (BDL). Methods: Male cirrhotic Wistar rats (8 weeks of intoxication and then hepatotoxin was discontinued) received either oral saline or Pirfenidone at 500 mg/kg per day. Results: High levels of alanine aminotransferase, aspartate aminotransferase, and alkaline phosphatase decreased significantly (P < 0.001) in animals treated with Pirfenidone (n = 11) with regard to saline-administrated animals (n = 9). Prothrombin activity and bilirubins were also reduced. Computerized fibrosis index demonstrated a 70% decrease (P < 0.001) along with less hydroxyproline content, reduction in activated HSC and higher active cell regeneration. A rearrangement of the parenchyma was also noted and gene expression of collagens I, III and IV, transforming growth factor β-1, Smad-7, TIMP-1 and PAI-1 decreased considerably in treated animals. Cirrhotic rats in which CCl4 was not discontinued displayed 40% liver fibrosis reduction. In a different cirrhosis model, 4-week BDL rats treated with the drug showed a significant 50% reduction in hepatic fibrosis (P < 0.01). Conclusions: This new drug might be useful in healing human disease. © 2002 European Association for the Study of the Liver. Published by Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0168-8278 UR - ISI:000179584700013 L2 - hepatic regeneration;antifibrotic therapy;gene regulation;metalloprotease;ANTIFIBROTIC AGENT; KUPFFER CELLS; GENE-THERAPY; RAT LIVERS; CIRRHOSIS; COLLAGEN; MICE SO - Journal of Hepatology 2002 ;37(6):797-805 5481 UI - 11249 AU - Garcia MG AU - Lima V AU - Calhoun DA AU - Torres A AU - Roque R AU - Christensen RD AD - Natl Inst Perinatol, Mexico City, DF, MexicoNatl Inst Perinatol, San Luis Potosi City, San Luis Potosi, MexicoHosp Gen Dr Ignacio Morones Prieto, San Luis Potosi City, San Luis Potosi, MexicoUniv S Florida, All Childrens Hosp, St Petersburg, FL 33701, USA TI - Enteral administration of a sterile, isotonic, non-caloric solution containing recombinant growth factors to neonates recovering from necrotizing enterocolitis (NEC): A phase I/II dose-escalation trial MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 2 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714600848 SO - Pediatric Research 2002 ;51(4):146A-146A 5482 UI - 11253 AU - Garcia MG AU - Chevuru SC AU - Saxonhouse MA AU - Theriaque DW AU - Hutson AD AU - Christensen RD AU - Sola MC AD - Inst Nacl Perinatol, Mexico City, DF, MexicoUniv Florida, Gen Clin Res Ctr, Gainesville, FL, USAUniv S Florida, St Petersburg, FL 33701, USAUniv S Florida, All Childrens Hosp, St Petersburg, FL 33701, USA TI - Effect of implementing platelet transfusion guidelines in a neonatal intensive care unit MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714601793 SO - Pediatric Research 2002 ;51(4):308A-309A 5483 UI - 11711 AU - Garcia R AU - Hirata GA AU - Farias MH AU - McKittrick J AD - UNAM, CCMC, CICESE, Prog Posgrado Fis & Mat, Ensenada 22860, Baja California, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoUniv Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093, USAGarcia, R, UNAM, CCMC, CICESE, Prog Posgrado Fis & Mat, Km 103 Carretera Tijuana, Ensenada 22860, Baja California, Mexico TI - A novel method for the synthesis of sub-microcrystalline wurtzite-type InxGa1-xN powders AB - A novel method to synthesize wurtzite-type gallium-indium nitride powders (InxGa1-xN, x = 0, 0.5, 1) with small particle size, high purity and high crystallinity has been developed. The method produces finely divided powders via the pyrolysis reaction of a complex salt (ammonium hexafluoroindium-gallate, (NH4)(3)InxGa1-xF6) in an ultrahigh purity ammonia flow inside of a quartz tubular reactor at relatively low temperature, 630 C. The conditions of the process avoid the formation of metallic indium, oxides or fluorides. Scanning electron microscopy and X-ray diffraction analysis performed on these sub-micron particles of InxGa1-xN show an hexagonal wurtzite-type structure, which is very similar to pure InN produced by the same technique. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000174019500002 L2 - wurtzite-type;ammonium hexafluoroindium-gallate;microcrystalline;InxGa1-xN SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2002 ;90(1-2):7-12 5484 UI - 9551 AU - Garcia RA AU - Sanchez-Bringas F AD - Univ Fed Goias, Inst Matemat & Estatist, BR-74001970 Goiania, Go, BrazilUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoGarcia, RA, Univ Fed Goias, Inst Matemat & Estatist, Caixa Postal 131, BR-74001970 Goiania, Go, Brazil TI - Closed principal lines of surfaces immersed in the Euclidean 4-space AB - In this paper, nu-principal cycles of surfaces immersed in R-4 are studied. In terms of geometric invariants, an integral expression for the first derivative of the Poincare mapping associated with a nu-principal cycle is obtained MH - Brazil MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 1079-2724 UR - ISI:000179949000002 L2 - curvature lines;nu-principal configuration;principal cycles;Poincare map SO - Journal of Dynamical and Control Systems 2002 ;8(2):153-166 5485 UI - 10699 AU - Garcia S AU - Portelles J AU - Font R AU - Quinones JR AU - Heiras JL AU - Martinez E AU - Siqueiros JM AD - Univ La Habana, Fac Fis, Dept Fis Aplicada, Havana, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoGarcia, S, Univ La Habana, Fac Fis, Dept Fis Aplicada, San Lazaro & L, Havana, Cuba TI - Effect of Zr doping on the structural and dielectric properties of Ba0.7Sr0.3Ti1-yZryO3 ceramics AB - The effect of Zr4+ (0%, 1%, 3%, 5%, 7%, 10%) doping on Ba0.7Sr0.3Ti1-yZryO3 ceramics is studied by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Thermoelectric Analysis, Dielectric Polarization and Electromechanical Resonance. The a/c parameter ratio is evaluated as a function of Zr concentration. A uniform grain size distribution was found in the doped samples as opposed to the undoped samples where a bimodal distribution is found. The grain size seems to increase quadratically with Zr4+ content. From the dependence of the dielectric permittivity (epsilon) with temperature an increase of epsilon' with dopant concentration is observed as well as a decrease in the permittivity maximum temperature (T-max). The dielectric polarization vs. temperature curves are presented for the different doping concentrations MH - Cuba MH - Mexico|Baja California PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000176861500050 L2 - ferroelectric;doping;dielectric permittivity SO - Ferroelectrics 2002 ;268():721-727 5486 UI - 10097 AU - Garcilazo H AU - Pena MT AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoCtr Fis Interaccoes Fundamentais, P-1049001 Lisbon, PortugalInst Super Tecn, Dept Fis, P-1049001 Lisbon, PortugalGarcilazo, H, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - The reaction np ->eta d near threshold AB - We have calculated the cross section for the process np-->etad in the region near threshold, within the framework of a three-body model. We studied the dependence of the cross section to the production mechanism and to the initial- and final-state interactions. We found that the magnitude of the cross section is highly dependent on the reaction mechanism. However, its shape is essentially determined by the etad final-state interaction alone. This strong signature in turn directly provides information about the etaN scattering length. For a variety of reaction mechanisms it is verified that the np-->etad experimental data can only be explained if the etaN scattering length has a small real part, as it happens, for instance, in the etaN interaction model proposed recently by the Julich group MH - Mexico|Distrito Federal MH - Portugal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000178383900027 L2 - NUCLEON NUCLEON-INTERACTION; FREE P+N->D+ETA REACTION; QUASI-BOUND STATE; NEAR-THRESHOLD; ETA-D; SCATTERING LENGTH; EXCHANGE MODEL; MESON; PHOTOPRODUCTION; COLLISIONS SO - Physical Review C 2002 ;66(3): 5487 UI - 11384 AU - Gardea-Torresdey JL AU - Parsons JG AU - Gomez E AU - Peralta-Videa J AU - Troiani HE AU - Santiago P AU - Yacaman MJ AD - Univ Texas, CNM, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUNAM, Inst Fis, Mexico City 20, DF, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAUniv Texas, Environm Sci & Engn PhD Program, El Paso, TX 79968, USAYacaman, MJ, Univ Texas, CNM, Texas Mat Inst, Austin, TX 78712, USA TI - Formation and growth of Au nanoparticles inside live alfalfa plants AB - In modern nanotechnology one of the most exciting areas is the interaction between inorganic quantum dots and biological structures. For instance gold clusters surrounded by a shell of organic ligands covalently attach to proteins or other biological substances and can be used for labeling in structural biology. In the present report we show the possibility of using live plants for the fabrication of nanoparticles. Alfalfa plants were grown in an AUCl(4) rich environment, The absorption of Au metal by the plants was confirmed by X-ray absorption studies (XAS), and transmission electron microscopy (TEM). Atomic resolution analysis confirmed the nucleation and growth of Au nanoparticles inside the plant and that the Au nanoparticles are in a crystalline state. Images also showed defects such as twins in the crystal structure, and in some cases icosahedral nanoparticles were found, X-ray EDS studies corroborated that the nanoparticles are pure gold. This is the first report on the formation of gold nanoparticles by living plants and opens up new and exciting ways to fabricate nanoparticles. It shows how it is possible to link materials science and biotechnology in the new emerging field of nanobiotechnology MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 55 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000175041800030 L2 - RAY-ABSORPTION SPECTROSCOPY; MEDICAGO-SATIVA ALFALFA; GOLD(III); CLUSTERS; BIOMASS; IMAGES; GOLD SO - Nano Letters 2002 ;2(4):397-401 5488 UI - 11863 AU - Gardner SL AU - de Leon GPP AD - Univ Nebraska, State Museum, Harold W Manter Lab Parasitol, Lincoln, NE 68588, USAUniv Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 04510, DF, MexicoGardner, SL, Univ Nebraska, State Museum, Harold W Manter Lab Parasitol, W-529 Nebraska Hall, Lincoln, NE 68588 USA TI - Yungasicola travassosi gen. n., sp n. (Digenea : Dicrocoeliidae : Eurytrematinae) from two species of grass mice of the genus Akodon Meyen (Rodentia : Muridae) from the Yungas of Bolivia AB - A new species and genus of digenetic trematode of the family Dicrocoeliidae is described from 2 species of grass mice, Akodon fumeus and Akodon mimus, both collected from an isolated area in the eastern part of the Andes mountains or Yungas of Bolivia. This species differs from all known dicrocoeliids in the unique disposition of the vitelline fields, the much less extensive uterus through the body of the worm (extending posteriad only just past the rnidline), and cecal branches that are generally conspicuous and lined with a thick layer of glandular epithelial tissue MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 1 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000173696300007 L2 - Digenea;Dicrocoeliidae;Eurytrematinae;new species;Yungasicola travassosi sp n.;Mammalia;Muridae;Akodon;Yungas;Departamento de La Paz;Rio Aceromarca;Bolivia SO - Comparative Parasitology 2002 ;69(1):51-57 5489 UI - 11131 AU - Garibay-Alonso R AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Toulouse 3, Phys Quant Lab, CNRS, UMR 5626, F-31062 Toulouse, FranceGaribay-Alonso, R, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Temperature dependence of the magnetization of transition-metal thin films: Fe-monolayers and bilayers AB - The functional integral theory of bulk itinerant magnetism is extended to be applied to low-dimensional transition-metal systems. Using a real-space recursive expansion of the local Green's function we calculate the magnetization curves and the Curie temperature T-C for the bulk, monolayer, and bilayer of Fe. Disorder is treated by using the virtual crystal approximation. The local-environment dependence of T-C is analyzed by comparing the results for bulk and the (001) and (110) oriented films of Fe. Finally, the applicability of the theory is discussed. (C) 2002 American Institute of Physics MH - France MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000175576400143 L2 - ITINERANT-ELECTRON SYSTEMS; SPIN FLUCTUATION THEORY; NARROW BANDS; MAGNETISM; IRON SO - Journal of Applied Physics 2002 ;91(10):8254-8256 5490 UI - 9165 AU - Garipov GK AU - Kalmykov NN AU - Panasyuk MI AU - Silaev AA AU - Khrenov BA AU - Sharakin SA AU - Yashin IV AU - Aleksandrov VV AU - Bugrov DI AU - Saprykin OA AU - Syromyatnikov VS AU - Bitkin VE AU - Eremin SA AU - Urmantsev FF AU - Grebenyuk VM AU - Kalinin AI AU - Naumov DV AU - Shat NM AU - Sabirov BM AU - Skryl I AU - Tkachev LG AU - Finger M AU - Kordero A AU - Martinez O AU - Moreno E AU - Salazar H AU - Villasenor L AU - Zepeda A AU - Linsley J AU - Park I AD - DV Skobeltsyn Nucl Phys Res Inst, Moscow, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaSP Korolev Rocket Space Co, Korolev, RussiaLuch Special Design Bur, Syzran, RussiaDubna Joint Nucl Res Inst, Dubna 141980, RussiaUniv Autonoma Puebla, Puebla 72570, MexicoCINVESTAV, IPN, Mexico City 14000, DF, MexicoGaripov, GK, DV Skobeltsyn Nucl Phys Res Inst, Moscow, Russia TI - Space experiment TUS studying extremely-high-energy cosmic rays MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Russia PB - MOSCOW: MEZHDUNARODNAYA KNIGA RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - Russian IS - 0367-6765 UR - ISI:000180296700034 SO - Izvestiya Akademii Nauk Seriya Fizicheskaya 2002 ;66(11):1644-1646 5491 UI - 10122 AU - Garnovskii AD AU - Kharisov BI AU - Blanco LM AU - Sadimenko AP AU - Uraev AI AU - Vasilchenko IS AU - Garnovskii DA AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov Na Donu 344006, RussiaKharisov, BI, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, Mexico TI - Review: Metal complexes as ligands AB - Ligand properties of coordination and organometallic compounds are examined on the basis of acid-base interactions of metal-containing bases and Lewis acids. Such interactions lead to homo- or heteronuclear di- and polynuclear complexes. Special attention is given to coordinatively-unsaturated molecules of classic Werner complexes, o-hydroxyazomethine chelates, metal carbonyls and their derivatives, ferrocenes with donor fragments, and coordinated heteroaromatic compounds MH - Mexico|Nuevo Leon MH - Russia PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0095-8972 UR - ISI:000178382800002 L2 - bimetallic;coordination complexes;Lewis base;Lewis acid;polynuclear;TRIPLE-DECKER COMPLEXES; X-RAY STRUCTURE; ORGANOMETALLIC POLYDENTATE LIGANDS; PZ = PYRAZOLATE; CRYSTAL-STRUCTURE; BRIDGING LIGANDS; BINUCLEAR COMPLEXES; COORDINATION CHEMISTRY; PI-COMPLEXES; TRIDENTATE LIGAND SO - Journal of Coordination Chemistry 2002 ;55(10):1119-1141 5492 UI - 10584 AU - Garrido-Latorre F AU - Hernandez-Avila M AU - Tamayo-Orozco J AU - bores-Medina A AU - Aro A AU - Palazuelos E AU - Hu H AD - Inst Nacl Salud Publ, Cuernavaca, Morelos, MexicoHosp Med Sur, Mexico City, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoHarvard Univ, Sch Med, Brigham & Womens Hosp, Channing Lab,Dept Med, Cambridge, MA 02138, USAOccupat Hlth Program, Cambridge, MA 02138, USAAmer British Cowdray Hosp, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USA TI - The relationship of blood and bone lead to menopause and bone mineral density among middle aged woman in Mexico City MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600439 SO - Epidemiology 2002 ;13(4):S163-S163 5493 UI - 9403 AU - Garza-Gonzalez E AU - Hold GL AU - Perez-Perez GI AU - Bosques-Padilla FJ AU - Tijerina-Menchaca R AU - El-Omar EM AD - Univ Autonoma Nuevo Leon, Dept Microbiol, Fac Med, Monterrey, MexicoUniv Aberdeen, Dept Med & Therapeut, Aberdeen, ScotlandNYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USAUniv Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Monterrey, Mexico TI - Role of the polymorphic cytokines genes in gastric cancer in Mexico MH - Mexico|Nuevo Leon MH - United Kingdom MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000178344100085 SO - Gut 2002 ;51():A23-A23 5494 UI - 9404 AU - Garza-Gonzalez E AU - Bosques-Padilla FJ AU - Perez-Perez GI AU - Tijerina-Menchaca R AD - Univ Autonoma Nuevo Leon, Dept Microbiol, Fac Med, Monterrey, MexicoUniv Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Monterrey, MexicoNYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USA TI - Potential correlation of HLA-DQ alleles and clinical outcomes related to H-pylori CagA plus and VacA MH - Mexico|Nuevo Leon MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000178344100094 SO - Gut 2002 ;51():A25-A26 5495 UI - 11878 AU - Garza EHH AU - Garza JLH AU - Gonzalez HR AU - Trevino AT AU - Flores MI AU - Amione GT AD - IMSS, Dept Cardiol, Ctr Med Noreste 34, Monterrey, NL, MexicoIMSS, Dept Cirugia Cardiovasc & Torac, Ctr Med Noreste 34, Monterrey, NL, MexicoHosp Univ Dr Jose Eleuterio Gonzalez, Dept Hematol, Monterrey, NL, MexicoBaylor Coll Med, Dept Med, Secc Cardiol, Winters Ctr Heart Failure Res, Houston, TX 77030, USAMethodist Hosp, Houston, TX 77030, USAAmione, GT, 6550 Fannin,MS SM 1901, Houston, TX 77030, USA TI - Importance of tumor necrosis factor-alpha in the pathogenesis of heart failure AB - Clinical and experimental evidence demonstrating the effects of tumor necrosis factor-alpha (TNF-alpha) in patients with heart failure continues to accumulate. It is well established that high concentrations of TNF-alpha appear in the circulation of patients with heart failure and that these levels have a directly proportional correlation with the patient's functional class. TNF-alpha levels also show a linear relation with prognosis. These circulating levels are responsible for the decreased expression of myocardial TNF-alpha receptors observed in heart failure. As a result of extrapolation of findings from experimental animals, we assume that TNF-alpha is deleterious to myocardial function in humans because it induces a negative inotropic state in patients who have not undergone heart transplant. Supporting this assumption is the fact that the resolution or improvement of pressure overload (obstructive hypertrophic myocardiopathy, by ethanol ablation) and volume overload (terminal dilated myocardiopathy, by ventricular assistance) states is accompanied by a decrease in myocardial TNF-alpha expression. The use of specific antagonists of circulating TNF-alpha in patients with symptomatic heart failure has been demonstrated to be safe and possibly effective. At present, multicenter studies are under way to assess the efficacy of this antagonism in a larger number of patients. If the results of these studies are favorable, we will have new therapeutic elements for managing patients with advanced hear failure. The transplanted heart behaves differently from the native heart. From the early stages of HTx, myocardial TNF-alpha expression is greatly increased (much more than in patients with heart failure) and not associated with contractile dysfunction, in contrast with what occurs in the native heart. However, we know that the transplanted heart soon develops ventricular hypertrophy, fibrosis, diastolic dysfunction, and late graft failure, even in the presence of normal epicardial coronary arteries. Clinical evidence suggests that TNF-alpha may be involved in these processes MH - Mexico|Nuevo Leon MH - USA PB - BARCELONA: EDICIONES DOYMA S/L RP - NOT IN FILE U3 - TC 6 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - Spanish IS - 0300-8932 UR - ISI:000173540900010 L2 - tumor necrosis factor-alpha;heart failure;heart transplant;ADULT FELINE MYOCARDIUM; FACTOR-BINDING-PROTEIN; FAILING HUMAN HEART; FACTOR RECEPTORS; EXPRESSION; GENE SO - Revista Espanola de Cardiologia 2002 ;55(1):61-66 5496 UI - 11352 AU - Garza RSM AU - Fuller M AD - UNAM, Unidad Invest Ciencias Tierra, Queretaro 76230, MexicoUniv Hawaii, Hawaii Inst Geophys & Planetol, SOEST, Honolulu, HI 96822, USAGarza, RSM, UNAM, Unidad Invest Ciencias Tierra, Campus Juriquilla, Queretaro 76230, Mexico TI - Paleolatitudes and magnetostratigraphy for Cenozoic sediments, ODP leg 182: The Great Australian Bight AB - Cenozoic northward drift of the Australian plate was determined from paleomagnetism of Middle Eocene through Pleistocene sediment cores from ODP Leg 182 (Sites 1126, 1128, and 1134) in the Great Australian Bight. Paleolatitude estimates are based on stepwise AF and thermal demagnetization of -400 discrete samples, of which similar to250 provided reliable data. The characteristic magnetization of the sediments resides in magnetite and magnetic sulfides. Middle Eocene through Lower Oligocene (similar to36 Ma) paleolatitudes of similar to52degrees (+/-2degrees) change gradually to Late Miocene (similar to9 Ma) paleolatitudes of similar to48degrees (+/-2degrees). These data, combined with Australian paleomagnetic pole data, indicate a slow rate of northward motion through much of the Cenozoic (similar to28 mm/yr). These data also indicate an abrupt acceleration in the Late Miocene (drift rate similar to115 mm/yr), coinciding with tectonic events in Southeast Asia. Paleolatitude estimates support Miocene versions of the Australian apparent polar wander path that place the Oligocene-Miocene pole (similar to25 Ma) at similar to70degreesS-125degreesE and the Late Miocene pole at similar to70degreesS-105degreesE (e.g., Idnurm, 1985, 1994). Inclination data for discrete samples also provide a refined magnetostratigraphy for portions of the Miocene, Oligocene, and Eocene carbonate and siliciclastic section of the Great Australian Bight MH - Mexico|Queretaro MH - USA PB - TOKYO: TERRA SCIENTIFIC PUBL CO RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1343-8832 UR - ISI:000175131000006 L2 - POLAR WANDER PATH; PALEOMAGNETISM; PLATE; SEA SO - Earth Planets and Space 2002 ;54(4):399-413 5497 UI - 10074 AU - Gasca-Leyva E AU - Leon CJ AU - Hernandez JM AU - Vergara JM AD - IPN, Ctr Res & Adv Studies, Merida 97310, Yucatan, MexicoUniv Las Palmas Gran Canaria, Marine Sci Fac, Dept Biol, Las Palmas Gran Canaria 35017, SpainUniv Las Palmas Gran Canaria, Dept Quantitat Methods Econ & Management, Las Palmas Gran Canaria 35017, SpainUniv Las Palmas Gran Canaria, Dept Appl Econ Anal, Las Palmas Gran Canaria 35017, SpainGasca-Leyva, E, IPN, Ctr Res & Adv Studies, Apdo Postal 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Bioeconomic analysis of production location of sea bream (Sparus aurata) cultivation AB - This paper develops a bioeconomic model to evaluate the production of gilthead sea bream in floating cages based on two locations, the Canary Islands and the Mediterranean. The model includes four sub-models: biologic, environment, production management, and economic. The biologic sub-model contains a growth model based on this species physiology. A wide range of farm scales were considered, deriving the production and input costs for each scale and scenario. The results for average costs showed increasing returns, with a rising internal rate of return (IRR). The efficient farm size was obtained for alternative management decisions and location scenarios. The results revealed that input costs, and therefore product costs, were higher in the Canary Islands than in the Mediterranean. However, environmental conditions in the Canary Islands are shown to be more favorable than in the Mediterranean, resulting in a more rapid growth, which leads to higher returns. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Yucatan MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000178515500017 L2 - economics;bioeconomic model;simulation;Sparus aurata;FISH GROWTH; SYSTEM SO - Aquaculture 2002 ;213(1-4):219-232 5498 UI - 9943 AU - Gastelum S AU - Osuna I AU - Melendrez R AU - Cruz-Zaragoza E AU - Chernov V AU - Calderon T AU - Barboza-Flores M AD - Univ Sonora, Programa Maestria Ciencias Fis, Hermosillo 83190, Sonora, MexicoUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoUniv Autonoma Madrid, Dept Quim Agricola Geol Geoquim, E-28049 Madrid, SpainBarboza-Flores, M, Univ Sonora, Programa Maestria Ciencias Fis, Apartado Postal 5-088, Hermosillo 83190, Sonora, Mexico TI - Application of a thermoluminescence method for the detection of irradiated spices AB - -Food irradiation is extremely effective at reducing food-borne illness as well as losses caused by infestation and contamination. Despite the well-established regulations that permit irradiation to control pathogens in spices, there are no widespread methods to detect previously irradiated food. Therefore, it has become necessary to develop new detection and dose determination methods for food subjected previously to irradiation. The present work deals with the application of the thermoluminescence (TL) phenomenon to detect irradiated spices. The process is based upon the thermoluminescence properties exhibited by the polymineral content of the irradiated specimen. After separating the organic material. it is possible to extract some polymineral Substances that are suitable for thermoluminescence analysis due to interaction of the spice to ionising radiation. The method was Successfully applied to examine irradiated and non-irradiated paprika of Mexican origin. The spice was irradiated with gamma rays at doses of 5, 10 and 15 kGy. The separated thermoluminescent polymineral was found to be composed mainly of quartz and feldspar. The thermoluminescence glow Curve of the irradiated specimen shows a wide band peaked 228, 268 and 336degreesC, resembling closely the combined TL of quartz and feldspars. The method allows for the determination of the retrospective dose exposure MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - Spain PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899900025 L2 - LUMINESCENCE; FELDSPARS; HERBS SO - Radiation Protection Dosimetry 2002 ;101(1-4):137-140 5499 UI - 11639 AU - Gauthier PM AU - Zeron ES AD - Univ Montreal, Dept Math & Stat, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, Mexico TI - Approximation on arcs and dendrites going to infinity in C-n - In memoriam: Herbert James Alexander 1940-1999 AB - On a locally rectifiable arc going to infinity, each continuous function can be approximated by entire functions MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: CANADIAN MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0008-4395 UR - ISI:000174257400008 SO - Canadian Mathematical Bulletin-Bulletin Canadien de Mathematiques 2002 ;45(1):80-85 5500 UI - 9720 AU - Gavazzi G AU - Boselli A AU - Pedotti P AU - Gallazzi A AU - Carrasco L AD - Univ Milano Bicocca, I-20126 Milan, ItalyLab Astrophys Marseille, F-13376 Marseille 12, FranceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUNAM, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoGavazzi, G, Univ Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy TI - H alpha surface photometry of galaxies in the Virgo cluster - IV. The current star formation in nearby clusters of galaxies AB - Halpha + [NII] imaging observations of 369 late-type (spiral) galaxies in the Virgo cluster and in the Coma/A1367 supercluster are analyzed, covering 3 rich nearby clusters (A1367, Coma and Virgo) and nearly isolated galaxies in the Great-Wall. They constitute an optically selected sample (m(p) < 16.0) observed with &SIM;60% completeness. These observations provide us with the current (T < 10(7) yrs) star formation properties of galaxies that we study as a function of the clustercentric projected distances (Theta). The expected decrease of the star formation rate (SFR), as traced by the Halpha EW, with decreasing Theta is found only when galaxies brighter than M-p similar to -19.5 are considered. Fainter objects show no or reverse trends. We also include in our analysis Near Infrared data, providing information on the old (T > 109 yrs) stars. Put together, the young and the old stellar indicators give the ratio of currently formed stars over the stars formed in the past, or "birthrate" parameter b. For the considered galaxies we also determine the "global gas content" combining HI with CO observations. We define the "gas deficiency" parameter as the logarithmic difference between the gas content of isolated galaxies of a given Hubble type and the measured gas content. For the isolated objects we find that b decreases with increasing NIR luminosity. In other words less massive galaxies are currently forming stars at a higher rate than their giant counterparts which experienced most of their star formation activity at earlier cosmological epochs. The gas-deficient objects, primarily members of the Virgo cluster, have a birthrate significantly lower than the isolated objects with normal gas content and of similar NIR luminosity. This indicates that the current star formation is regulated by the gaseous content of spirals. Whatever mechanism (most plausibly ram-pressure stripping) is responsible for the pattern of gas deficiency observed in spiral galaxies members of rich clusters, it also produces the observed quenching of the current star formation. A significant fraction of gas "healthy" (i.e. with a gas deficiency parameter less than 0.4) and currently star forming galaxies is unexpectedly found projected near the center of the Virgo cluster. Their average Tully-Fisher distance is found approximately one magnitude further away (mu(o) = 31.77) than the distance of their gas-deficient counterparts (mu(o) = 30.85), suggesting that the gas healthy objects belong to a cloud projected onto the cluster center, but in fact lying a few Mpc behind Virgo, thus unaffected by the dense IGM of the cluster MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000179574300012 L2 - galaxies : photometry;galaxies : clusters : individual : Virgo;DWARF IRREGULAR GALAXIES; 2.2 M TELESCOPE; SPIRAL GALAXIES; DISK GALAXIES; NEUTRAL HYDROGEN; EVOLUTION; COMA; GAS; SUPERCLUSTER; MORPHOLOGY SO - Astronomy & Astrophysics 2002 ;396(2):449-461 5501 UI - 11360 AU - Gavazzi G AU - Boselli A AU - Pedotti P AU - Gallazzi A AU - Carrasco L AD - Univ Milano Bicocca, I-20126 Milan, ItalyTraverse Siphon, Astron Spatiale Lab, F-13376 Marseille 12, FranceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUNAM, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoGavazzi, G, Univ Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy TI - H alpha surface photometry of galaxies in the Virgo cluster - I. Observations with the San Pedro Martir 2.1 m telescope AB - Halpha imaging observations of 125 galaxies obtained with the 2.1 m telescope of the San Pedro Martir Observatory (SPM) (Baja California, Mexico) are presented. The observed galaxies are mostly Virgo cluster members (77), with 36 objects in the Coma/A1367 supercluster and 12 in the clusters A2197 and A2199 taken as fillers. Halpha+[NII] fluxes and equivalent widths, as well as images of the detected targets are presented MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000175132100013 L2 - galaxies : photometry;galaxies : clusters : individual : Virgo;SPIRAL GALAXIES; STAR-FORMATION; SUPERCLUSTER; CATALOG; COMA SO - Astronomy & Astrophysics 2002 ;386(1):114-123 5502 UI - 10624 AU - Gazarian KG AU - Gening LV AU - Gazarian TG AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol & Biotechnol, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Mol Genet, Moscow, RussiaUniv Nacl Autonoma Mexico, Fac Med, Dept Publ Hlth, Mexico City 04510, DF, MexicoGazarian, KG, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol & Biotechnol, Apartado Postal 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - L-homoserine: a novel excreted metabolic marker of hepatitis B abnormally produced in liver from methionine AB - The hepatitis B infection leads to various profound pathological processes in liver metabolism. Some biochemical alterations detectable by blood analysis are currently used for a preliminary evaluation of the infection. Based on existing data we present here evidence that non-protein amino acid L-homoserine is a pathological, hepatitis B-induced metabolite that is formed and excreted into urine from methionine via splitting S-adenosylmethionine. The urine L-homoserine is proposed as a new marker in the pre-diagnosis examinations that is easier for the clinical analysis than currently used blood test, and is applicable to large-scale epidemiological surveys of the probability of hepatitis B. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0306-9877 UR - ISI:000177023300008 L2 - MAMMALIAN-CELLS; RISK FACTOR; THREONINE SO - Medical Hypotheses 2002 ;58(4):279-283 5503 UI - 9826 AU - Gaztanaga E AD - INAOE, Astrofis, Puebla 7200, MexicoIEEC, CSIC, Barcelona 08034, SpainGaztanaga, E, INAOE, Astrofis, Apdo Postal 216 & 51, Puebla 7200, Mexico TI - Large-scale structures in the early Sloan Digital Sky Survey: Comparison of the north and south galactic strips AB - We compare the large-scale galaxy clustering between the north and south Sloan Digital Sky Survey (SDSS) early data release (EDR) and also with the clustering in the Automatic Plate Measuring Facility (APM) Galaxy Survey. The three samples are independent and cover an area of 150, 230, and 4300 deg(2), respectively. We combine SDSS data in different ways to approach the APM selection. Given the good photometric calibration of the SDSS data and the very good match of its north and south number counts, we combine them in a single sample. The joint clustering is compared with equivalent subsamples in the APM. The final sampling errors are small enough to provide an independent test for some of the results in the APM. We find evidence for an inflection in the shape of the two-point function in the SDSS that is very similar to what is found in the APM. This feature has been interpreted as evidence for nonlinear gravitational growth. By studying higher-order correlations, we can also confirm good agreement with the hypothesis of Gaussian initial conditions (and small biasing) for the structure traced by the large-scale SDSS galaxy distribution MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179291400016 L2 - cosmology : observations;galaxies : clusters : general;large-scale structure of universe;VARIANCE SO - Astrophysical Journal 2002 ;580(1):144-153 5504 UI - 10874 AU - Gaztanaga E AD - INAQE, Puebla 72000, MexicoUniv Barcelona, Dept Fis Fonamental, E-08028 Barcelona, SpainCSIC, ICE, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, SpainGaztanaga, E, INAQE, Apdo Postal 216 & 51, Puebla 72000, Mexico TI - Galaxy clustering in the Sloan Digital Sky Survey (SDSS): A first comparison with the APM Galaxy Survey AB - We compare the large-scale galaxy clustering in the new Sloan Digital Sky Survey (SDSS) early data release (EDR) with the clustering in the APM Galaxy Survey. We cut out pixel maps (identical in size and shape) from the SDSS and APM data to allow a direct comparison of the clustering. Here we concentrate our analysis on an equatorial SDSS strip in the South Galactic Cap (EDR/SGC) of 166 deg(2) , 25 wide and 65degrees long. Only galaxies with Petrosian magnitudes 16.8200 h after spawning) or as calyptopis 1 (C1) stage (>232 h), rather than as N1. Delayed hatching of embryos also was observed in T. spinifera as nauplius 2 (N2) (>120 h) or as MN stage (>180 h), and in T. inspinata as N2 (106 h) after spawning. Eggs with larvae in stages of development beyond N1 have not been observed from preserved zooplankton samples. However, eggs spawned in the field and incubated in the laboratory also had extended development and late hatching but with low frequency (<0.06%). It is proposed that, if the backward hatching mechanism fails, alternate hatching mechanisms can be used by the euphausiid. There is high flexibility in their hatching modes. The N2 and MN break the chorion with the first and second antennae, hatching forwards, and the C1 breaks it with the telson spines and by flipping of the abdomen, resembling the decapod hatching mechanism. Delayed hatching using the forward and flipping mechanisms were associated with low hatching success in comparison with the backward hatching mechanism MH - Mexico|Baja California Sur MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0142-7873 UR - ISI:000179669200002 L2 - SUPERBA DANA; YELLOW SEA; PACIFICA; EMBRYOS SO - Journal of Plankton Research 2002 ;24(12):1265-1276 5531 UI - 10218 AU - Gomez-Larranaga JC AU - Heil WH AD - Ctr Invest Matemat, Guanajuato 36000, Gto, MexicoFlorida State Univ, Dept Math, Tallahassee, FL 32306, USAGomez-Larranaga, JC, Ctr Invest Matemat, AP 402, Guanajuato 36000, Gto, Mexico TI - Seifert unions of solid tori AB - We obtain a list of all 3-manifolds that can be obtained by gluing 3-balls and solid tori along mutually disjoint surfaces in their boundaries MH - Mexico|Guanajuato MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0025-5874 UR - ISI:000178131500006 L2 - 3-MANIFOLDS SO - Mathematische Zeitschrift 2002 ;240(4):767-785 5532 UI - 11336 AU - Gomez-Larranaga JC AU - Heil WH AD - Ctr Invest & Matemat, Guanajuato 360005, MexicoFlorida State Univ, Dept Math, Tallahassee, FL 32306, USAGomez-Larranaga, JC, Ctr Invest & Matemat, AP 402, Guanajuato 360005, Mexico TI - Seifert unions and spaces of graphs in S-3 AB - Let Gamma be a non-splittable graph in S-3, not a tree. It is shown that if the space M = S-3 - N (Gamma) of Gamma is a Seifert union of solid tori then M is homeomorphic to the space of a tree of Burde-Murasugi links MH - Mexico|Guanajuato MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0218-2165 UR - ISI:000175098700009 L2 - Burde-Murasugi links;graphs;Seifert unions;Seifert-webs SO - Journal of Knot Theory and Its Ramifications 2002 ;11(2):277-282 5533 UI - 11561 AU - Gomez-Larranaga JC AU - Heil W AD - Ctr Invest Matemat, Guanajuato 36000, MexicoFlorida State Univ, Dept Math, Tallahassee, FL 32306, USAGomez-Larranaga, JC, Ctr Invest Matemat, AP 402, Guanajuato 36000, Mexico TI - Singhof fillings of closed 3-manifolds AB - We give a complete classification of all closed, connected 3-manifolds which admit a Singhof filling with any number of solid tori MH - Mexico|Guanajuato MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-2611 UR - ISI:000174621600002 L2 - STIEFEL-WHITNEY SURFACES; TRI-GENUS; CATEGORY SO - Manuscripta Mathematica 2002 ;107(1):15-23 5534 UI - 11285 AU - Gomez-Perez FJ AU - Fanghanel-Salmon G AU - Barbosa JA AU - Montes-Villarreal J AU - Berry RA AU - Warsi G AU - Gould EM AD - Inst Nacl Ciencias Med & Nutr SZ, Mexico City, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoCtr Invest Noroeste, Tijuana, MexicoHosp Univ Autonoma Nuevo Leon, Monterrey, MexicoGlaxoSmithKline, Collegeville, PA, USAGould, EM, 3 Franklin Plaza,Mail Code 3F0705,1600 Vine St, Philadelphia, PA 19102 USA TI - Efficacy and safety of rosiglitazone plus metformin in Mexicans with type 2 diabetes AB - Background Type 2 diabetes is a growing problem in Mexico. The present study was undertaken to evaluate the efficacy and safety of rosiglitazone 2 mg or 4 mg twice daily (bd) in combination with metformin 2.5 g/day in Mexican patients whose type 2 diabetes was inadequately controlled with metformin alone. Methods This randomized, double-blind, placebo-controlled study was conducted at four centers in Mexico. A total of 116 patients were randomized to metformin 2.5 g/day plus placebo (n = 39), metformin 2.5 g/day plus rosiglitazone 2 mg bd (n = 3 7), or metformin 2.5 g/day plus rosiglitazone 4 mg bd (n = 40) for 26 weeks. Results Mean hemoglobin A(1c) (HbA(1c)) levels decreased significantly from baseline to Week 26 in the rosiglitazone 2 mg bd (-0.7%; p = 0.0052) and 4 mg bd (-1.2%; p = 0.0008) groups, but increased in the placebo group (+0.3%; P=0.2651). Mean fasting plasma glucose and fructosamine levels also improved significantly with metformin plus rosiglitazone therapy in a dose-ordered manner compared with placebo (p less than or equal to 0.0019 and p = 0.0006, respectively). C-peptide and immunoreactive insulin levels were decreased from baseline in both rosiglitazone groups. Although mean increases in total cholesterol, low-density lipoprotein (LDL) -cholesterol, and high-density lipoprotein (HDL)-cholesterol were observed in the rosiglitazone groups, the total cholesterol: HDL-cholesterol ratio remained unchanged. The proportion of patients with one or more adverse events was similar across all three groups. There were no cases of hepatotoxicity. Conclusion Addition of rosiglitazone 2 mg bd and 4 mg bd to metformin therapy improved glycemic control in Mexican patients whose type 2 diabetes was inadequately controlled by metformin alone. Furthermore, the combination of rosiglitazone plus metformin was well tolerated. Copyright (C) 2002 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|Baja California MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 43 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 1520-7552 UR - ISI:000175336300006 L2 - rosiglitazone;metformin;type 2 diabetes;CORONARY HEART-DISEASE; CLINICAL RISK-FACTORS; GLYCEMIC CONTROL; INSULIN-RESISTANCE; MICROVASCULAR COMPLICATIONS; DIFFERING DIETARY; SAN-ANTONIO; FATTY-ACIDS; MELLITUS; MONOTHERAPY SO - Diabetes-Metabolism Research and Reviews 2002 ;18(2):127-134 5535 UI - 9968 AU - Gomez-Roman VR AU - Cao CH AU - Bai T AU - Santamaria H AU - Acero G AU - Manoutcharian K AU - Weiner DB AU - Ugen KE AU - Gevorkian G AD - Univ S Florida, Coll Med, Dept Med Microbiol & Immunol, Tampa, FL 33612, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Penn, Sch Med, Dept Pathol & Lab Med, Philadelphia, PA 19104, USAUgen, KE, Univ S Florida, Coll Med, Dept Med Microbiol & Immunol, MDC 10,12901 Bruce B Downs Blvd, Tampa, FL 33612 USA TI - Phage-displayed mimotopes recognizing a biologically active anti-HIV-1 gp120 murine monoclonal antibody AB - Antibody-dependent cellular cytotoxicity (ADCC) is a host defense mechanism in which Fc receptor-bearing effector cells in combination with antigen-specific antibodies recognize and kill antigen-expressing target cells. The authors previously described a murine monoclonal antibody (MAb-ID6) that mediated ADCC activity against HIV-infected cells. It was demonstrated that the specificity of MAb-ID6 maps to the first 204 amino acids of gp120; however, the exact epitope was not identified. In the present work, by screening phage display libraries with MAb-ID6, the authors have mapped the corresponding epitope to amino acids 86-100 (HIV-1(MN) gp120 sequence). This epitope lies within the C1 region of gp120 and is highly conserved among all subtypes and circulating recombinant forms of HIV-1. Thus, these phage mimotopes of C1 may serve as components of a vaccine for the induction of gp120-specific antibodies mimicking MAb-ID6 MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1525-4135 UR - ISI:000178884500004 L2 - ADCC antibody;phage display;epitope mapping;DEPENDENT CELLULAR CYTOTOXICITY; IMMUNODEFICIENCY-VIRUS TYPE-1; RANDOM PEPTIDE LIBRARIES; MEDIATED CYTOTOXICITY; HIV-INFECTION; EPITOPE; IDENTIFICATION; CELLS; CD4; FC SO - Jaids-Journal of Acquired Immune Deficiency Syndromes 2002 ;31(2):147-153 5536 UI - 10728 AU - Gomez A AU - Powers RF AU - Singer MJ AU - Horwath WR AD - Univ Calif Davis, Davis, CA 95616, USAColegio Post Grad, Programa Forestal, Montecillo Chapingo 56230, MexicoPacific SW Res Stn, Redding, CA 96001, USAHorwath, WR, Univ Calif Davis, 1 Shields Ave, Davis, CA 95616, USA TI - N uptake and N status in ponderosa pine as affected by soil compaction and forest floor removal AB - Soil compaction and forest floor removal influence fundamental soil processes that control forest productivity and sustainability. We investigated effects of soil compaction and forest floor removal on tree growth, N uptake and N status in ponderosa pine. Factorial combinations of soil compaction (non-compacted and compacted) and forest floor removal (forest floor present and no forest floor) were applied to three different surface soil textures. For studying N uptake, four trees from every treatment were N-15 labeled with 130.6 mg m(-2) of N-15. Tree responses to compaction were dependent on the forest floor removal level. In loam and clay soils, non-compacted+no forest floor was beneficial to tree growth. Tree growth was depressed with compaction+no forest floor in clay soil. In sandy loam soil, compaction+no forest floor showed the best tree growth. No N deficiency was found in any soil type but a graphical method suggested correlation between N status and tree growth. In loam and clay soils, compaction+forest floor present increased N uptake. Nitrogen uptake was explained significantly by potential N mineralization in loam and clay soils. In sandy loam soil, the effects of compaction and forest floor removal were more complex, with the N uptake improved in the compaction+no forest floor treatment and reduced under compaction+forest floor present. Soil compaction may have influenced N tracer uptake because of improved unsaturated flow and root-soil contact. However, N immobilization may have restricted N uptake in compaction+forest floor present in the sandy loam soil. The study illustrates how soil properties and site preparation can potentially interact to affect N dynamics and forest productivity MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000176806400010 L2 - forest productivity;forest soils;nutrient uptake;soil disturbances;tree growth;THIN-SECTION TECHNIQUE; VECTOR ANALYSIS; ORGANIC-MATTER; PICEA-MARIANA; PORE-SPACE; NITROGEN; GROWTH; MINERALIZATION; PRODUCTIVITY; VEGETATION SO - Plant and Soil 2002 ;242(2):263-275 5537 UI - 10924 AU - Gomez A AU - Lara VH AU - Bosch P AU - Reguera E AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaUniv Autonoma Metropolitana Iztapalapa, Unidad Iztapalapa, Mexico City 09340, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - The structure of two manganese hexacyanometallates(II): Mn-2[Fe(CN)(6)]center dot 8H(2)O and Mn-2[Os(CN)(6)]center dot 8H(2)O AB - The crystal structures of two manganese hexacyanometallates(II), Mn-2[Fe(CN)(6)].8H(2)O and Mn-2[Os(CN)(6)].8H(2)O, were refined from X-ray powder diffraction data using the Rietveld method, with the reported structure for Mn-2[Ru(CN)(6)].8H(2)O used as a structural model. These compounds are isomorphous and crystallize in the monoclinic space group P2(1)/n. Their crystallization water is not firmly bound and can be removed without disrupting the M-CdropN-Mn network. In the dehydrated complexes, the outer cation (Mn) remains linked to only three N atoms from CN ligands while the inner cation (Fe,Os) preserves its coordination sphere. The IR, Raman, and Mossbauer spectra for the hydrated and anhydrous forms are explained based on the refined structures. (C) 2002 International Centre for Diffraction Data MH - Cuba MH - Mexico|Distrito Federal PB - NEWTOWN SQ: J C P D S-INT CENTRE DIFFRACTION DATA RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0885-7156 UR - ISI:000176108300014 L2 - ferrocyanide;osmocyanide;X-ray diffraction;Rietveld method;Mossbauer;infrared;Raman;PRUSSIAN BLUE SO - Powder Diffraction 2002 ;17(2):144-148 5538 UI - 10554 AU - Gomez GA AU - Singer MJ AU - Powers RF AU - Horwath WR AD - Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616, USAColegio Postgrad, Programa Forestal, Montecillo Chapingo 56230, MexicoPacific SW Res Stn, Redding, CA 96001, USAHorwath, WR, Univ Calif Davis, Dept Land Air & Water Resources, 1 Shields Ave, Davis, CA 95616 USA TI - Soil compaction effects on water status of ponderosa pine assessed through C-13/C-12 composition (vol 22, pg 459, 2002) MH - USA MH - Mexico|Estado De Mexico PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Forestry U5 - J;Correction AV - English IS - 0829-318X UR - ISI:000177179000012 SO - Tree Physiology 2002 ;22(11):818-818 5539 UI - 11102 AU - Gomez GA AU - Singer MJ AU - Powers RF AU - Horwath WR AD - Pacific SW Res Stn, Redding, CA 96001, USAColegio Postgrad, Programa Forestal, Montecillo Chapingo 56230, MexicoHorwath, WR, Univ Calif Davis, Dept Land Air & Water Resources, 1 Shields Ave, Davis, CA 95616 USA TI - Soil compaction effects on water status of ponderosa pine assessed through C-13/C-12 composition AB - Soil compaction is a side effect of forest reestablishment practices resulting from use of heavy equipment and site preparation. Soil compaction often alters soil properties resulting in changes in plant-available water. The use of pressure chamber methods to assess plant water stress has two drawbacks: (1) the measurements are not integrative; and (2) the method is difficult to apply extensively to establish seasonal soil water status. We evaluated leaf carbon isotopic composition (delta(13)C) as a means of assessing effects of soil compaction on water status and growth of young ponderosa pine (Pinus ponderosa var. ponderosa Dougl. ex Laws) stands across a range of soil textures. Leaf delta(13)C in cellulose and whole foliar tissue were highly correlated. Leaf delta(13)C in both whole tissue and cellulose (holocellulose) was up to 1.0parts per thousand lower in trees growing in non-compacted (NC) loam or clay soils than in compacted (SC) loam or clay soils. Soil compaction had the opposite effect on leaf delta(13)C in trees growing on sandy loam soil, indicating that compaction increased water availability in this soil type. Tree growth response to compaction also varied with soil texture, with no effect, a negative effect and a positive effect as a result of compaction of loam, clay and sandy loam soils, respectively. There was a significant correlation between C-13 signature and tree growth along the range of soil textures. Leaf delta(13)C trends were correlated with midday stem water potentials. We conclude that leaf delta(13)C can be used to measure retrospective water status and to assess the impact of site preparation on tree growth. The advantage of the leaf delta(13)C approach is that it provides an integrative assessment of past water status in different aged leaves MH - USA MH - Mexico|Estado De Mexico PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Forestry U5 - J;Article AV - English IS - 0829-318X UR - ISI:000175714000003 L2 - C-13;Pinus ponderosa;soil texture;tree growth;STABLE-CARBON ISOTOPE; USE EFFICIENCY; GAS-EXCHANGE; TREE-RINGS; GROWTH; NITROGEN; FORESTS; PRODUCTIVITY; DROUGHT; STRESS SO - Tree Physiology 2002 ;22(7):459-467 5540 UI - 10442 AU - Gomez I AU - Miranda-Rios J AU - Rudino-Pinera E AU - Oltean DI AU - Gill SS AU - Bravo A AU - Soberon M AD - Univ Nacl Autonoma Mexico, Dept Mol Microbiol, Cuernavaca 62250, Morelos, MexicoUniv Nacl Autonoma Mexico, Dept Reconocimeinto Mol & Bioestructura, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Calif Riverside, Dept Cell Biol & Neurosci, Riverside, CA 92521, USASoberon, M, Univ Nacl Autonoma Mexico, Dept Mol Microbiol, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Hydropathic complementarity determines interaction of epitope (HITDTNNK876)-H-869 in Manduca sexta Bt-R-1 receptor with loop 2 of domain II of Bacillus thuringiensis Cry1A toxins AB - In susceptible insects, Cry toxin specificity correlates with receptor recognition. In previous work, we characterized an scFv antibody (scFv73) that inhibits binding of Cry1A toxins to cadherin-like receptor. The CDR3 region of scFv73 shared homology with an 8-amino acid epitope ((HITDTNNK876)-H-869) of the Manduca sexta cadherin-like receptor Bt-R-1 (Gomez, I., Oltean, D. I., Gill, S. S., Bravo, A., and Soberon, M. (2001) J. Biol. Chem. 276, 28906-28912). In this work, we show that the previous sequence of scFv73 CDR3 region was obtained from the noncoding DNA strand. However, most importantly, both scFv73 CDR3 amino acid sequences of the coding and noncoding DNA strands have similar binding capabilities to Cry1Ab toxin as Bt-R-1 (HITDTNNK876)-H-869 epitope, as demonstrated by the competition of scFv73 with binding to Cry1Ab with synthetic peptides with amino acid sequences corresponding to these regions. Using synthetic peptides corresponding to three exposed loop regions of domain II of Cry1Aa and Cry1Ab toxins, we found that loop 2 synthetic peptide competed with binding of scFv73 to Cry1A toxins in Western blot experiments. Also, loop 2 mutations that affect toxicity of Cry1Ab toxin are affected in scFv73 binding. Toxin overlay assays of Cry1A toxins to M. sexta brush border membrane proteins showed that loop 2 synthetic peptides competed with binding of Cry1A toxins to cadherin-like Bt-R-1 receptor. These experiments identified loop 2 in domain II of as the cognate binding partner of Bt-R-1 (HITDTNNK876)-H-869. Finally, 10 amino acids from beta-6-loop 2 region of Cry1Ab toxin ((SSTLYRRPFNI373)-S-363) showed hydropathic pattern complementarity to a 10-amino acid region of Bt-R-1 ((NITIHITDTNN875)-N-865), suggesting that binding of Cry1A toxins to Bt-R-1 is determined by hydropathic complementarity and that the binding epitope of Bt-R-1 may be larger than the one identified by amino acid sequence similarity to scFv73 MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000177509300097 L2 - BRUSH-BORDER MEMBRANE; DISPAR AMINOPEPTIDASE-N; DELTA-ENDOTOXIN; HELIOTHIS-VIRESCENS; INSECTICIDAL TOXIN; CRYSTAL PROTEINS; BOMBYX-MORI; IRREVERSIBLE BINDING; ARGININE RESIDUES; HIGH-AFFINITY SO - Journal of Biological Chemistry 2002 ;277(33):30137-30143 5541 UI - 8685 AU - Gomez M AU - Nath S AU - Bhatti S AU - Rasmussen A AU - Bidichandani SI AD - Univ Oklahoma, Hlth Sci Ctr, Oklahoma City, OK, USANatl Inst Neurol, Mexico City, DF, Mexico TI - Low frequency of Friedreich ataxia in the Mexican Mestizo population MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000178025801153 SO - American Journal of Human Genetics 2002 ;71(4):369-369 5542 UI - 10909 AU - Gomez MD AU - Rousseau G AU - Nadeau R AU - Berra R AU - Flores G AU - Suarez J AD - Univ Autonoma Puebla, Inst Fisiol, Puebla 72570, MexicoUniv Montreal, Hop Sacre Coeur Montreal, Ctr Rech, Montreal, PQ H4J 1C5, CanadaIPN, Escuela Super Med, Secc Estudios Postgrad & Invest, Mexico City 11340, DF, MexicoGomez, MD, Univ Autonoma Puebla, Inst Fisiol, 14 Sur,6301,Col San Manuel, Puebla 72570, Mexico TI - Functional and autoradiographic characterization of dopamine D-2-like receptors in the guinea pig heart AB - Dopamine receptors include the D-1- (D-1 and D-5 subtypes) and D-2-like (D-2, D-3, and D-4 subtypes) families. D-1-like receptors are positively and D-2-like receptors negatively coupled to the adenylyl cyclase. Dopamine D-2-like (D-4 subtype) receptors have been identified in human and rat hearts. However the presence of D-2 and D-3 receptor subtypes is unclear. Furthermore, their role in cardiac functions is unknown. By autoradiographic studies of guinea pig hearts, we identified D-3 and D-4 receptors, using the selective radioligands [H-3]-7-OH-DPAT and [H-3]emonapride (YM-09151-2 plus raclopride). Western blot analysis confirmed D-3 and D-4 receptors in the right and left ventricle of the same species. Selective agonists of D-3 and D-4 receptors (+/-)-7-OH-DPAT and PD 168 077 (10(-9) to 10(-5) M, respectively) induced a significant negative chronotropic and inotropic effect in the isolated guinea pig heart preparation. Negative inotropic effect induced by PD 168 077 was associated with an inhibition in cyclase activity. No changes in cyclase activity were found with (+/-)-7-OH-DPAT. The aim of this study is to support the presence of D-3 and D-4 receptors in the heart. Although our results suggest that D-3 and D-4 receptors are functionally active in the heart, we need additional information with an antagonist and an agonist of improved potency and selectivity to understand the respective roles of D-3 and D-4 receptors in the cardiac functions MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy;Physiology U5 - J;Article AV - English IS - 0008-4212 UR - ISI:000176313100009 L2 - dopamine receptors (D-2,D-3,D-4 subtypes);autoradiography;Western blot;cAMP;heart;RAT STRIATAL SYNAPTOSOMES; PHARMACOLOGICAL CHARACTERIZATION; CELL-LINES; HUMAN D-2; IN-VIVO; D2; EXPRESSION; LOCALIZATION; BINDING; D3 SO - Canadian Journal of Physiology and Pharmacology 2002 ;80(6):578-587 5543 UI - 10441 AU - Gomez S AD - Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan 82040, Sinaloa, MexicoLimburgs Univ Ctr, Dept SBG, Res Grp Zool, B-3610 Diepenbeek, BelgiumGomez, S, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Joel Montes Camarena S-N Ap,Postal 811, Mazatlan 82040, Sinaloa, Mexico TI - Some additions to the Mexican fauna: The family paramesochridae (Copepoda : harpacticoida) AB - Sediment samples were taken during a short-term study of the distribution of meiofauna from a coastal lagoon in Sinaloa (northwestern Mexico). Several species of harpacticoids (Copepoda: Harpacticoida) were observed among the taxa recovered. Some of these species are new to science, whereas some others are new records for Mexican brackish systems. Three species of Apodopsyllus (Harpacticoida: Paramesochridae) are described herein. One of them, A. alejandrovillalobosi sp. nov. proved to be closely related to its northern congener A. vermiculiformis known from California and British Columbia. Apodopsyllus samuelgomezi sp. nov. and A. pseudocubensis sp. nov. constitute new records of the neotropical arcuatus-chilensis-cubensis lineage. Apodopsyllus samuelgomezi sp. nov. is unique within this clade in the male P6 with two long inner setae. Apodopsyllus pseudocubensis sp. nov. was found to be allied to its Cuban relative A. cubensis. These two species share the general shape of female P5 and male P6 MH - Belgium MH - Mexico|Sinaloa PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000177574900014 SO - Journal of Crustacean Biology 2002 ;22(3):627-641 5544 UI - 9851 AU - Gomez Y AU - Miranda LF AU - Torrelles JM AU - Rodriguez LF AU - Lopez JA AD - UNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainCSIC, IEEC, E-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, Edifici Nexus, E-08034 Barcelona, SpainUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoGomez, Y, UNAM, Inst Astron, Campus Morelia,Apdo Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico TI - VLA observations at 7 mm of the planetary nebula IC 4997 AB - We present high angular resolution (0.1 arcsec) VLA observations at 7-mm wavelength towards the bipolar planetary nebula IC 4997. The 7-mm emission in IC 4997 is dominated by a bright, compact core, the flux density of which at this wavelength is about six times brighter than at 2.0 and 3.6 cm. We model the centimetre and millimetre continuum spectrum in terms of free-free emission from an ionized core-halo source. In this model a dense (2.6 x 10(6) cm(-3)), optically thick inner core dominates the millimetre emission, while a low-density (1 x 10(4) cm(-3)), optically thin halo dominates the centimetre emission. The spectral index of the core (between 2 cm and 7 mm) is alpha similar or equal to 1.6 +/- 0.1 (S-nu proportional to nu(alpha)), which is consistent with optically thick free-free emission. An upper limit for the mass-loss rate that created this inner core is similar to3 x 10(-6) M-. yr(-1), suggesting that this core may have been formed at the end of the superwind phase MH - Mexico|Baja California MH - Mexico|Michoacan MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000178981200010 L2 - ISM : jets and outflows;planetary nebulae : individual : IC 4997;radio continuum : ISM;PROTOPLANETARY DISKS; IC-4997; EVOLUTION; SYSTEM; JET SO - Monthly Notices of the Royal Astronomical Society 2002 ;336(4):1139-1142 5545 UI - 11095 AU - Gomez Y AU - Rodriguez LF AU - Garay G AD - UNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Chile, Dept Astron, Santiago, ChileGomez, Y, UNAM, Inst Astron, Apartado Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico TI - The nature of the cluster of radio sources in GGD 14 AB - We present sensitive radio continuum observations at 3.6 and 6 cm made quasi-simultaneously toward the star-forming region GGD 14. The observations reveal the presence of nine extremely compact (less than or equal to 0."3) and faint radio sources in a region of similar to30" around the bright cometary H II region, VLA 1. Most of these sources show variability at radio wavelengths, and their spectral indices are characteristically negative. Four of the faint sources have an infrared counterpart. We propose that gyrosynchrotron radiation from an active magnetosphere explains the emission from almost all the faint compact sources, suggesting that the GGD 14 region harbors a cluster of low-mass, pre-main-sequence stars. Two sources that do not show time variability are VLA 1, the cometary H II region, and VLA 7. The derived spectral index for VLA 7 (+0.6 +/- 0.3) fits the stellar wind model better than other possibilities, supporting the idea that VLA 7 is the powering source of the molecular outflow observed toward the GGD 14 region MH - Chile MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175830800027 L2 - HII regions;ISM : individual (GGD 14);ISM : jets and outflows;radio continuum : ISM;stars : pre-main-sequence;HERBIG-HARO OBJECTS; H-II REGION; SPECTRAL INDEXES; CONTINUUM; GGD-12-15; OUTFLOW; AMMONIA; STARS SO - Astrophysical Journal 2002 ;571(2):901-905 5546 UI - 11815 AU - Gomora JC AU - Murbartian J AU - Lee JH AU - Perez-Reyes E AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Virginia, Charlottesville, VA 22908, USA TI - Prepulse facilitation of human Ca(v)3.3 T-type calcium channels MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000173252703052 SO - Biophysical Journal 2002 ;82(1):622A-622A 5547 UI - 9785 AU - Gongora A AU - Jose JV AU - Schaffner S AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62250, Morelos, MexicoNortheastern Univ, Dept Phys, Boston, MA 02115, USANortheastern Univ, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115, USAGongora, A, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartheid Postal 48-3, Cuernavaca 62250, Morelos, Mexico TI - Classical solutions of an electron in magnetized wedge billiards AB - We have studied the classical solutions of a free electron constrained to move inside a circular wedge of angle theta(w), in the presence of a homogeneous constant magnetic field B. These billiards have broken rotational symmetry. As B and theta(w) are varied, the apex of the billiards affects the classical dynamics in an important way. We find that for billiards with angles (root5-1)/2less than or equal totheta(w)less than or equal topi/2, the dynamics exhibits a reentrant transition as the field increases. The transition is from regular-to-mixed-to-chaotic-to-mixed-to-chaotic regimes. The reentrance is connected to the appearance and disappearance of periodic orbits nucleated at the boundaries of these billiards as the field increases. There is no reentrance when theta(w)>pi/2. In the latter case as B increases the dynamics goes from quasiintegrable, to intermediate and then to chaotic whispering gallery Larmor modes MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179176300147 L2 - PERIODIC ORBIT THEORY; QUANTUM DOTS; FLUCTUATIONS; FIELDS SO - Physical Review e 2002 ;66(4): 5548 UI - 9665 AU - Gonzalez-Amaro R AU - Sanchez-Madrid F AD - Univ Autonoma San Luis Potosi, Fac Med, Dept Immunol, Mexico City, DF, MexicoUniv Autonoma Madrid, Hosp Univ Princesa, Serv Immunol, Madrid, Spain TI - Intercellular adhesion molecules and chemotaxic factors in the pathogenesis of multiple sclerosis AB - Introduction. Multiple sclerosis (MS) is an inflammatory immune disorder of the central nervous system characterized by the destruction of myelin sheaths and the cells which make them, the oligodendrocytes. Experimental allergic encephalitis (EAE) is an autoimmune condition mainly induced by the myelin basic protein (MBP) that is a very useful model for the study of demyelinating inflammatory diseases, particularly MS. Method. Cellular adhesion molecules are a wide group of membrane receptors which mediate adhesion processes, both cell-to-cell and between cells and the extracellular matrix. These molecules play an essential role in inflammatory phenomena, including EAE/MS Integrins of the beta(1) subfamily (mainly alpha(4)beta(1)), as well as leukocyte integrins and adhesion receptors of the immunoglobulin superfamily (ICAM-1, VCAM-1) are the main molecules involved. Chemokines also have an important role in MS, since they are able to attract and activate leukocytes, essential phenomena in the inflammatory reaction. An increased expression of chemokines CC or beta (e.g., RANTES, MIP-1alpha and beta, MCP-1, etc) has been found in EAE/MS, and it is very likely that they are involved in the migration of lymphocytes and monocytes towards the MS inflammatory lesions. Conclusion. The pharmacological blockade of adhesion molecules and chemokines is a promising and novel therapeutic approach in MS MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 2 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000179473200013 L2 - chemokines;inflammation;integrins;lymphocytes;EXPERIMENTAL AUTOIMMUNE ENCEPHALOMYELITIS; EXPERIMENTAL ALLERGIC ENCEPHALOMYELITIS; CENTRAL-NERVOUS-SYSTEM; MACROPHAGE INFLAMMATORY PROTEIN-1-ALPHA; MICROVASCULAR ENDOTHELIAL-CELLS; CHEMOKINE-RECEPTOR EXPRESSION; TYROSINE KINASE INHIBITOR; NECROSIS-FACTOR RECEPTOR; BLOOD-BRAIN-BARRIER; L-SELECTIN SO - Revista de Neurologia 2002 ;35(10):985-993 5549 UI - 10221 AU - Gonzalez-Barba G AU - Schwennicke T AU - Goedert JL AU - Barnes LG AD - Univ Autonoma Baja Calif Sur, Dept Geol Marina, La Paz, MexicoUniv Washington, Burke Museum Nat Hist & Culture, Div Geol, Seattle, WA 98195, USANat Hist Museum Los Angeles, Los Angeles, CA 90007, USAInst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz, Baja Calif Sur, MexicoGonzalez-Barba, G, POB 153, Wauna, WA 98395, USA TI - Earliest Pacific Basin record of the Pelagornithidae (Aves : Pelecaniformes) MH - Mexico|Baja California Sur MH - USA PB - NORTHBROOK: SOC VERTEBRATE PALEONTOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Paleontology U5 - J;Article AV - English IS - 0272-4634 UR - ISI:000178190800024 L2 - BAJA-CALIFORNIA-SUR; TEPETATE FORMATION; NORTH PACIFIC; LOWER EOCENE; MEXICO SO - Journal of Vertebrate Paleontology 2002 ;22(3):722-725 5550 UI - 10834 AU - Gonzalez-Chavez C AU - Harris PJ AU - Dodd J AU - Meharg AA AD - Univ Aberdeen, Dept Plant & Soil Sci, Aberdeen AB24 3UU, ScotlandColegio Postgrad, IRENAT, Area Microbiol Especialidad Edafol, Montecillo 56230, MexicoUniv Reading, Dept Soil Sci, Reading RG6 6DW, Berks, EnglandSittingbourne Res Ctr, Int Inst Biotechnol, Sittingbourne ME9 8HL, Kent, EnglandMeharg, AA, Univ Aberdeen, Dept Plant & Soil Sci, Cruickshank Bldg,St Machat Dr, Aberdeen AB24 3UU, Scotland TI - Arbuscular mycorrhizal fungi confer enhanced arsenate resistance on Holcus lanatus AB - The role of arbuscular mycorrhizal fungi (AMF) in arsenate resistance in arbuscular mycorrhizal associations is investigated here for two Glomus spp. isolated from the arsenate-resistant grass Holcus lanatus. Glomus mosseae and Glomus caledonium were isolated from H. lanatus growing on an arsenic-contaminated mine-spoil soil. The arsenate resistance of spores was compared with nonmine isolates using a germination assay. Short-term arsenate influx into roots and long-term plant accumulation of arsenic by plants were also investigated in uninfected arsenate resistant and nonresistant plants and in plants infected with mine and nonmine AMF. Mine AMF isolates were arsenate resistant compared with nonmine isolates. Resistant and nonresistant G. mosseae both suppressed high-affinity arsenate/phosphate transport into the roots of both resistant and nonresistant H. lanatus. Resistant AMF colonization of resistant H. lanatus growing in contaminated mine spoil reduced arsenate uptake by the host. We conclude that AMF have evolved arsenate resistance, and conferred enhanced resistance on H. lanatus MH - United Kingdom MH - Mexico|Estado De Mexico PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 17 U4 - Plant Sciences U5 - J;Article AV - English IS - 0028-646X UR - ISI:000176221300016 L2 - arbuscular mycorrhizal fungi;arsenate resistance;Glomus mosseae;Holcus lanatus;PHOSPHATE-UPTAKE KINETICS; YORKSHIRE FOG; HYMENOSCYPHUS-ERICAE; PHOSPHORUS-NUTRITION; UPTAKE SYSTEM; POT CULTURES; IANATUS L; L POACEAE; TOLERANCE; INFECTION SO - New Phytologist 2002 ;155(1):163-171 5551 UI - 10962 AU - Gonzalez-Chavez C AU - D'Haen J AU - Vangronsveld J AU - Dodd JC AD - Int Inst Biotechnol, Sittingbourne Res Ctr, Sittingbourne ME9 8HL, Kent, EnglandColegio Postgrad, Inst Recursos Nat, Programa Edafol, Area Microbiol Suelos, Montecillo 56230, Mexico, MexicoLimburgs Univ Ctr, Inst Mat Res, B-3590 Diepenbeek, BelgiumDodd, JC, Int Inst Biotechnol, Sittingbourne Res Ctr, 1-13 Innovat Bldg 1000, Sittingbourne ME9 8HL, Kent, England TI - Copper sorption and accumulation by the extraradical mycelium of different Glomus spp. (arbuscular mycorrhizal fungi) isolated from the same polluted soil AB - The form and localisation of Cu accumulation in the extraradical mycelium (ERM) of three arbuscular mycorrhizal fungi (AMF), isolated from the same polluted soil contaminated with the Cu and Arsenate, was studied. There were differences in the capacity of the ERM of the three AMF to sorb and accumulate Cu. Glomus caledonium BEG133 had a significantly lower Cu-sorption capacity than Glomus mosseae BEG132 and Glomus claroideum BEG134 isolated from the polluted soil as well as an isolate of G. mosseae BEG25 from a non-polluted soil. This was directly related to the cation exchange capacity (CEC) of the ERM of these fungi. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) linked to an energy dispersive X-ray spectrometer (EDAX) gave more detailed information, showing that the ERM of AMF from the polluted soil was able to accumulate Cu in the mucilaginous outer hyphal wall zone, cell wall and inside the hyphal cytoplasm. The EDAX spectra showed that the accumulated Cu was mainly associated with Fe in the mucilaginous outer hyphal wall zone and in the cell wall. Cu was associated with traces of arsenate inside the cytoplasm of the ERM of Glomus mosseae BEG132 but this was not visible inside the ERM of Glomus caledonium BEG133 or Glomus claroideum BEG134. This work suggests that the ERM of AMF is able to sorb and accumulate Cu, but different tolerance mechanisms exist between the three AMF isolated from the same polluted soil providing further evidence for functional diversity within populations of AMF in soils MH - Belgium MH - United Kingdom MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 22 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000176005400008 L2 - arbuscular mycorrhizal fungi;functional diversity;heavy metals;metal sequestration;potentially toxic elements;ECTOMYCORRHIZAL PINUS-SYLVESTRIS; HEAVY-METAL TOLERANCE; ZINC TOXICITY; PISOLITHUS-TINCTORIUS; MUCOR-ROUXII; AMELIORATION; BIOSORPTION; INFECTION; CADMIUM; LOCALIZATION SO - Plant and Soil 2002 ;240(2):287-297 5552 UI - 10351 AU - Gonzalez-Estrada E AU - Fawcett RH AU - Herrero M AD - Univ Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JG, Midlothian, ScotlandNatl Autonomous Univ Mexico, Fac Med Vet, Mexico City, DF, MexicoGonzalez-Estrada, E, Univ Edinburgh, Inst Ecol & Resource Management, Agr Bldg,W Mains Rd, Edinburgh EH9 3JG, Midlothian, Scotland TI - Integrating models of relative abundance of species with the dry-weight-rank method for the botanical analysis of forest understorey vegetation AB - The objective of this work was to determine the applicability of the dry-weight-rank (DWR) method for evaluating the botanical composition of forest understorey vegetation. An analysis of plant species abundance was carried out, and instead of ranking the three most abundant species, as is commonly used, up to twelve ranks were scored. Concurrently, four models of relative abundance distribution (RAD) of species were compared for their ability to explain the abundance of species in the study area. The Power-fraction model resulted in the best goodness-of-fit and it was subsequently used to produce the coefficients for the DWR method. Lin's concordance correlation coefficient, the adjusted coefficient of determination, the residual standard deviation and Spearman's rank-order correlation coefficient indicated a good performance of the DWR method. Biomass data and the Shannon index for diversity were also considered. Further analyses showed that there was a trade-off between the number of ranks scored and the accuracy of the botanical composition produced by the DWR method. It is concluded that, so long as the RAD model that explains the distribution of plant species is known, the DWR method can be applied to forest understorey vegetation MH - Mexico|Distrito Federal MH - United Kingdom PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0142-5242 UR - ISI:000177852800010 L2 - dry-weight-rank method;species abundance;botanical composition;understorey vegetation;sampling method;COMMUNITY STRUCTURE; PATTERNS; PASTURE; EXPLANATION; GRASSLAND; BIOMASS SO - Grass and Forage Science 2002 ;57(2):171-183 5553 UI - 11015 AU - Gonzalez-Galvan EJ AU - Pazos-Flores F AU - Skaar SB AU - Cardenas-Galindo A AD - Univ Autonoma San Luis Postosi, Fac Ingn, Ctr Invest & Estudios Posgrado, San Luis Potosi 78290, MexicoUniv Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556, USAGonzalez-Galvan, EJ, Univ Autonoma San Luis Postosi, Fac Ingn, Ctr Invest & Estudios Posgrado, Av Dr Manuel Nava 8, San Luis Potosi 78290, Mexico TI - Camera pan/tilt to eliminate the workspace-size/pixel-resolution tradeoff with camera-space manipulation AB - The successful implementation of close-tolerance. three-dimensional rigid body assembly has been robustly achieved using camera-space manipulation in a limited region of the manipulator's workspace. The extension of this capability to a broader region can in general be achieved by mounting the cameras on computer-controlled platforms or "pan/tilt" units. The use of this type of platform enables the encompassing of a large physical region within the fields of view of the cameras, while preserving an approximately constant image-plane resolution per unit physical space. The paper describes the derivations involved in the determination of view parameters when the information of the angles of pan/tilt rotation of the cameras is available. Such procedure enables adequate parameter observability with a greatly reduced sampling in terms of number and breadth. Practical considerations for the implementation of this capability for a high-precision, three-dimensional task across a large workspace region are also presented. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|San Luis Potosi MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Interdisciplinary Applications;Engineering, Manufacturing;Robotics U5 - J;Article AV - English IS - 0736-5845 UR - ISI:000175915500002 L2 - robotics;vision;camera-space manipulation;estimation;MOMENTS; VISION SO - Robotics and Computer-Integrated Manufacturing 2002 ;18(2):95-104 5554 UI - 11696 AU - Gonzalez-Hernandez J AU - Gorley PM AU - Horley PP AU - Vartsabyuk OM AU - Vorobiev YV AD - Chernivtsi Natl Univ, UA-58012 Chernovtsy, UkraineCINVESTAV, IPN, Queretaro 76001, QRO, MexicoGorley, PM, Chernivtsi Natl Univ, 2 Kotsyubynsky Str, UA-58012 Chernovtsy, Ukraine TI - X-Ray, kinetic and optical properties of thin CuInS2 films AB - In this paper we present the copper indium disulfide thin films production technology by spraying with further pyrolysis, and the results of the investigation of X-ray. kinetic and optical properties of manufactured films at 300 K. It was shown that the conductivity type and specific resistance values depend on chemical elements that dominate in the solution (indium or copper).The band gap value for CuInS2 films, measured by absorption spectra analysis was within the range of 1.3-1.5 eV, depending on molar composition of components, temperature and type of substrate. It was shown that if the anisotropy and non-parabolicity of the hole dispersion law in D-2d(12) crystals are left without consideration, it will lead to significant errors in determination of semiconductor material parameters with chalcopyrite structure. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000174053800091 L2 - CuInS2 films;spraying;pyrolysis;X-ray diffraction;absorption spectra;SPRAY-PYROLYSIS SO - Thin Solid Films 2002 ;403():471-475 5555 UI - 8155 AU - Gonzalez-Lopez L AU - Garcia-Gonzalez A AU - Vazquez-del-Mercado M AU - Munoz-Valle JF AU - Gamez-Nava JI AD - Inst Mexicano Segruo Social, Dept Med Interna Reumatol, Guanajuato, MexicoUniv Guadalajara, Inst Biol Mol & Med, Guadalajara, SpainIMSS, Clin HECMNO, Unidad Invest & Epidemiol, Guanajuato, Mexico TI - Efficacy of methotrexate in ankylosing spondylitis: A randomized, placebo-controlled, double-blind trial MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421801166 SO - Arthritis and Rheumatism 2002 ;46(9):S433-S433 5556 UI - 9704 AU - Gonzalez-Partida E AU - Carrillo-Chavez A AU - Grimmer JOW AU - Pironon J AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Qro, MexicoUnvi Henri Poincare Nancy 1, Fac Sci, CREGU, F-54501 Vandoeuvre Les Nancy, FranceGonzalez-Partida, E, Univ Nacl Autonoma Mexico, Ctr Geociencias, Campus Juriquilla AP 1-742, Juriquilla 76230, Qro, Mexico TI - Petroleum-rich fluid inclusions in fluorite, Purisima mine, Coahuila, Mexico AB - Mexico has been a world leader in fluorite production. This study demonstrates a genetic link between petroleum basinal fluids and fluorite deposits. Fluid inclusions in fluorite from the La Purisima mine, northeast Mexico, were analyzed using UV-fluorescence, petrographic, and microthermometric techniques. Three different populations of inclusions were identified: (1) petroleum-rich (L-1 + V); (2) aqueous-rich (L-2 + V), and (3) immiscible liquids (L-1 + L-2 + V), where L-1 is liquid hydrocarbon, L-2 is a brine, and V is vapor phase. The L-2 + V inclusions are primary, whereas the L-1 + V and the L-1 + L-2 + V are pseudo- secondary. Some of the L-1 + V petroleum-rich inclusions show necking down and leakage. Frequently, these inclusions contain a solid phase composed of heavy hydrocarbons (solid bitumens?). At low temperature, the petroleum-rich L-1 + V inclusions were unaffected by freezing, and it was only possible to measure ice melting temperature (Tm = -10.2degreesC) in one three-phase, petroleum-rich inclusion (L-1 + L-2 + V), which corresponds to a salinity of 14.15 wt% NaCl equivalent. UV-fluorescence micro-thermometry indicates the presence of light dim heavy hydrocarbons in the oily inclusions. During heating runs. these oil-bearing inclusions have homogenization temperatures between 50degrees and 150degreesC. The aqueous-rich L-2 + V inclusions range ill salinity from 5.7 to 18.13 wt. % NaCl equivalent with homogenization temperature ranging front 75degrees to 155degreesC. These inclusions show white fluoreseence under UV indicative of a brine. The salinity and homogenization temperature of all the inclusions are similar to those of Mississippi Valley-type (MVT) deposits and petroleum basins. In this Study, we interpreted the Upper Jurassic rock sequence of the Chihuahua-Sabinas basin to be the source of the oil-trapped inclusions, and very likely, of some of the fluorine. The alkaline magmatism of the Trans-Pecos Province was the source of mineralizing fluids, and hence, of some of the fluorine too. This event remobilized the petroleum brine and hydrocarbons trapped as fluid inclusions within fluorite MH - France MH - Mexico|Queretaro PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 2 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000179531300005 L2 - MINERALIZATION SO - International Geology Review 2002 ;44(8):755-764 5557 UI - 10130 AU - Gonzalez-Solis D AU - Moravec F AD - IPN, CINVESTAV, Ctr Res & Adv Studies, Parasitol Lab,Merida Unit, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicGonzalez-Solis, D, IPN, CINVESTAV, Ctr Res & Adv Studies, Parasitol Lab,Merida Unit, Antigua Carretera Progreso Km 6,AP 73, Merida 97310, Yucatan, Mexico TI - A new atractid nematode, Atractis vidali sp n. (Nematoda : Atractidae), from cichlid fishes in southern Mexico AB - A new nematode species, Atractis vidali sp. n., is described from the intestine of cichlid fishes, Vieja intermedia (Gunther) (type host) and Cichlasoma pearsei (Hubbs), from specimens collected in three localities in the Mexican states of Campeche (Santa Gertrudis Creek) and Chiapas (Cedros and Lacanja Rivers). It differs from the only other atractid species reported in fishes of Mexico, Atractis bravoae, mainly in possessing two very unequal spicules. In contrast to the 10 species parasitising amphibians and reptiles in America, the new species has a longer body, spicules and a gubernaculum, and a different distribution of the caudal papillae. This is the second species of the genus Atractis recorded from freshwater fishes MH - Czech Republic MH - Mexico|Yucatan PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000178489300009 L2 - parasitic nematode;Atractis vidali;Atractidae;freshwater fishes;Cichlasoma;Vieja;Mexico SO - Folia Parasitologica 2002 ;49(3):227-230 5558 UI - 11572 AU - Gonzalez-Solis D AU - Moravec F AU - Vidal-Martinez VM AU - Zarate-Perez SE AD - Natl Polytech Inst, Ctr Res & Adv Studies, Parasitol Lab, Merida Unit, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicGonzalez-Solis, D, Natl Polytech Inst, Ctr Res & Adv Studies, Parasitol Lab, Merida Unit, Carretera Antigua Progreso Km 6,AP 73, Merida 97310, Yucatan, Mexico TI - Parasitic nematodes of the Florida pompano, Trachinotus carolinus, from the Peninsula of Yucatan, Mexico AB - A helminthological examination of 51 specimens of the Florida pompano, Trachinotus carolinus (Linnaeus), from three localities (Campeche, Progreso and Celestun) off the coast of the Yucatan Peninsula, Mexico, revealed the presence of the following species of parasitic nematodes: Cucullanus trachinoti, Capillaria (Procapillaria) gracilis, Ascarophis sp., Echinocephalus sp. larvae and Hysterothylacium sp. type MD of Deardorff and Overstreet, 1981 larvae. Cucullanus trachinoti and C. gracilis were the most frequently recorded species. All findings represent new host and geographical records MH - Czech Republic MH - Mexico|Yucatan PB - BRATISLAVA: SLOVAK ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 1 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 0440-6605 UR - ISI:000174574500006 L2 - nematodes;parasites;Trachinotus carolinus;Mexico SO - Helminthologia 2002 ;39(1):35-40 5559 UI - 11864 AU - Gonzalez-Solis D AU - Moravec F AU - Vidal-Martinez VM AU - guirre-Macedo ML AD - IPN, CINVESTAV, Ctr Res Adv Studies, Parasitol Lab,Merida Unit, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicGonzalez-Solis, D, IPN, CINVESTAV, Ctr Res Adv Studies, Parasitol Lab,Merida Unit, Carretera Antigua Progreso Km 6,AP 73, Merida 97310, Yucatan, Mexico TI - Redescription of Ascarophis ayalai (Nematoda : Cystidicolidae) from the Mayan Sea catfish Ariopsis assimilis from the Bay of Chetumal, Quintana Roo, Mexico AB - The nematode Ascarophis ayalai Caballero. 1975, originally inadequately described from Arius liropus (Bristol in Gilbert, 1897) in Nayarit and Sonora, Mexico, is redescribed on the basis of examination of types and new material obtained from the stomach of the Mayan sea catfish Ariopsis assimilis (Gunther, 1864) from the Bay of Chetumal. Quintana Roo, Mexico. Ascarophis ayalai differs markedly from its congeners in possessing a left spicule of unusual shape and structure. Ariopsis assimilis represents a new host record for A. ayalai MH - Czech Republic MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 6 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000173696300010 L2 - Ascarophis ayalai;Ariopsis assimilis;Mayan sea catfish;Nematoda;Chetumal;Mexico SO - Comparative Parasitology 2002 ;69(1):66-71 5560 UI - 9646 AU - Gonzalez-Velarde JL AU - Laguna M AD - Ctr Sistemas Manufactura, Monterrey 64920, NL, MexicoUniv Colorado, Leeds Sch Business, Boulder, CO 80309, USAGonzalez-Velarde, JL, Ctr Sistemas Manufactura, Monterrey 64920, NL, Mexico TI - Tabu search with simple ejection chains for coloring graphs AB - We present a Tabu Search (TS) method that employs a simple version of ejection chains for coloring graphs. The procedure is tested on a set of benchmark problems. Empirical results indicate that the proposed TS implementation outperforms other metaheuristic methods, including Simulated Annealing, a previous version of Tabu Search and a recent implementation of a Greedy Randomized Adaptive Search Procedure (GRASP) MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0254-5330 UR - ISI:000179770500010 L2 - graph coloring;metaheuristics;tabu search;ejection chains SO - Annals of Operations Research 2002 ;117(1-4):165-174 5561 UI - 9737 AU - Gonzalez AE AU - Martinez-Lopez F AU - Moncho-Jorda A AU - Hidalgo-Alvarez R AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Granada, Dept Fis Aplicada, Grp FIs Fluidos & Biocoloides, E-18071 Granada, SpainGonzalez, AE, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Concentration effects on two- and three-dimensional colloidal aggregation AB - By means of extensive numerical simulations of diffusion-limited colloidal aggregation in two and three dimensions, we have found the concentration dependence of the structural and dynamical quantities. Both on- and off-lattice simulations were used in 2D to check the independence of our results on the simulational algorithms and on the space structure. The range in concentration studied spanned two-and-a-half orders of magnitude, in both dimensionalities. In two dimensions, it was found that the cluster fractal dimension difference from the zero-concentration value shows a linear increase with the concentration, while this increase is of a square root type for the three-dimensional case. For the exponent z, defining the increase of the weight-average cluster size as a function of time, the difference from the zero-concentration value in three dimensions is again of a square root type increase with concentration, while in two dimensions this increase goes as the 0.6 power of the concentration. We give arguments for the drastic change in the power laws for the case of the fractal dimension, when going from two to three dimensions, and for the small change for the case of the kinetic exponent z. We also present the master curves for the scaling of the cluster size distribution and their dependence on concentration, in both dimensionalities. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000179502800034 L2 - colloidal aggregation;fractal dimension;kinetic exponents;concentration dependence;SIMULATIONS; CLUSTERS SO - Physica A-Statistical Mechanics and Its Applications 2002 ;314(1-4):235-245 5562 UI - 11799 AU - Gonzalez AE AU - Martinez-Lopez F AU - Moncho-Jorda A AU - Hidalgo-Alvarez R AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Granada, Dept Fis Aplicada, Grp Fis Fluidos & Biocoloides, E-18071 Granada, SpainGonzalez, AE, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Two-dimensional colloidal aggregation: Concentration effects AB - Extensive numerical simulations of diffusion-limited (DLCA) and reaction-limited (RLCA) colloidal aggregation in two dimensions were performed to elucidate the concentration dependence of the cluster fractal dimension and of the different average cluster sizes. Both on-lattice and off-lattice simulations were used to check the independence of our results on the simulational algorithms and on the space structure. The range in concentration studied spanned 2.5 orders of magnitude. In the DLCA case and in the flocculation regime, it was found that the fractal dimension shows a linear-type increase with the concentration phi, following the law: d(f) = d(f0) + aphi(c). For the on-lattice simulations the fractal dimension in the zero concentration limit, d(f0), was 1.451 +/- 0.002, while for the off-lattice simulations the same quantity took the value 1.445 +/- 0.003. The prefactor a and exponent c were for the on-lattice simulations equal to 0.633 +/- 0.021 and 1.046 +/- 0.032, while for the off-lattice simulations they were 1.005 +/- 0.059 and 0.999 +/- 0.045, respectively. For the exponents z and z', defining the increase of the weight-average (S-w(t)) and number-average (S-n(t)) cluster sizes as a function of time, we obtained in the DLCA case the laws: z = z(o) + bphi(d) and z' = z'(o) + b'phi(d'). For the on-lattice simulations, z(o), b, and d were equal to 0.593 +/- 0.008, 0.696 +/- 0.068, and 0.485 +/- 0.048, respectively, while for the off-lattice simulations they were 0.595 +/- 0.005, 0.807 +/- 0.093, and 0.599 +/- 0.051. In the case of the exponent z', the quantities z'(o), b', and d' were, for the on-lattice simulations, equal to 0.615 +/- 0.004, 0.814 +/- 0.081, and 0.620 +/- 0.043, respectively, while for the off-lattice algorithm they took the values 0.598 +/- 0.002, 0.855 +/- 0.035, and 0.610 +/- 0.018. In RLCA we have found again that the fractal dimension, in the flocculation regime, shows a similar linear-type increase with the concentration d(f) = d(f0) + aphi(c), with d(f0) = 1.560 +/- 0.004, a = 0.342 +/- 0.039, and c = 1.000 +/- 0.112. In this RLCA case it was not possible to find a straight line in the log-log plots of S-w(t) and S-n(t) in the aggregation regime considered, and no exponents z and z' were defined. We argue however that for sufficiently long periods of time the cluster averages should tend to those for DLCA and, therefore, their exponents should coincide with z and z' of the DLCA case. Finally, we present the bell-shaped master curves for the scaling of the cluster size distribution function and their evolution when the concentration increases, for both the DLCA and RLCA cases. (C) 2002 Elsevier Science (USA) MH - Mexico|Morelos MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000173783600002 L2 - colloidal aggregation;fractal dimension;kinetic exponents;2 DIMENSIONS; INVARIANCE; PARTICLES; ORDER SO - Journal of Colloid and Interface Science 2002 ;246(2):227-234 5563 UI - 9084 AU - Gonzalez CAL AU - Pina GL AD - Denver Zool Fdn, Dept Cons Biol, Denver, CO 80205, USACESUES, Hermosillo, Sonora, MexicoGonzalez, CAL, Denver Zool Fdn, Dept Cons Biol, 2300 Steele St, Denver, CO 80205 USA TI - Carrion use by jaguars (Panthera onca) in Sonora, Mexico MH - USA MH - Mexico|Sonora PB - PARIS: MUSEUM NAT HIST NATURELLE RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0025-1461 UR - ISI:000181084600010 L2 - LIVESTOCK SO - Mammalia 2002 ;66(4):603-605 5564 UI - 10566 AU - Gonzalez GM AU - Tijerina R AU - Najvar L AU - Rinaldi M AU - Yeh IT AU - Graybill JR AD - Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Colonia Mitras Ctr, Monterrey 64460, Nuevo Leon, MexicoUniv Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78229, USAS Texas Vet Hlth Care Syst, Aldie L Murphy Div, San Antonio, TX 78229, USAGonzalez, GM, Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Colonia Mitras Ctr, Madero & Dr Eduardo A Pequeno SN, Monterrey 64460, Nuevo Leon, Mexico TI - Experimental murine model of disseminated Pseudallescheria infection AB - Pseudallescheria boydii is found in soil and has a worldwide distribution. This fungus was initially identified as a pathogen targeting a variety of tissues. There are fragmentary data in the literature on the in vitro susceptibility of P. boydii to different antifungal compounds. P. boydii is highly refractory to antifungal treatments. In this study, a murine model of disseminated Pseudallescheria infection was developed to evaluate efficacy of different treatment regimens. A clinical strain of P. boydii was studied in normal and neutropenic outbred ICR mice. Several inocula were tested over a range from 1 x 10(3) to 5 x 10(6) cfu. Groups of eight mice were injected with a intravenous dose of one inoculum. Mortality correlated with the dose of the inoculum, and with immunosuppression. Quantitative cultures of various tissues showed initial dissemination of disease in immune competent mice. This was followed by reduction of tissue burden, except in the brain. In contrast, disseminated infection persisted in most organs in immunosuppressed animals (p < 0.0001). This model should be appropriate for in vivo evaluation of antifungal chemotherapy MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: B I O S SCIENTIFIC PUBLISHERS LTD RP - NOT IN FILE U3 - TC 4 U4 - Mycology;Veterinary Sciences U5 - J;Article AV - English IS - 1369-3786 UR - ISI:000177080400002 L2 - experimental infection;murine model;Pseudallescheria;pseudallescheriosis;CENTRAL-NERVOUS-SYSTEM; SCEDOSPORIUM-APIOSPERMUM; PETRIELLIDIUM-BOYDII; BRAIN-ABSCESS; ENDOPHTHALMITIS; TRANSPLANTATION; ENDOCARDITIS; PATIENT; THERAPY; VALVE SO - Medical Mycology 2002 ;40(3):243-248 5565 UI - 11364 AU - Gonzalez GM AU - Tijerina R AU - Najvar LK AU - Bocanegra R AU - Rinaldi M AU - Loebenberg D AU - Graybill JR AD - Univ Autonama Nuevo Leon, Dept Microbiol, Fac Med, Monterrey 64460, NL, MexicoUniv Texas, Hlth Sci Ctr, Div Infect Dis 7881, Dept Med, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78229, USAS Texas Vet Hlth Care Syst, Audie L Murphy Div, San Antonio, TX 78224, USASchering Plough Res Inst, Kenilworth, NJ 07033, USAGonzalez, GM, Univ Autonama Nuevo Leon, Dept Microbiol, Fac Med, Madero & Dr Eduardo A Pequeno S-N Colonia Mitras, Monterrey 64460, NL, Mexico TI - In vitro and in vivo activities of posaconazole against Coccidioides immitis AB - Posaconazole (SCH 565921) was tested against 25 strains of Coccidioides immitis to determine their in vitro susceptibilities. The geometric mean 48-h MIC of posaconazole (POSA) was 0.5 mug/ml, the MIC range was 0.25 to 1 mug/ml, and the MIC at which 50% of the isolates tested are inhibited (MIC50) and the MIC90 were 0.5 and 1 mug/ml, respectively. The geometric mean 48-h MIC of itraconazole (ITRA) was 0.23 mug/ml, the MIC range was 0.125 to 0.5 mug/ml, and the MIC50 and MIC90 were both 0.25 mug/ml. Two strains of C immitis were selected for in vivo studies on the basis of the POSA 48-h MICs for the isolates. POSA orally administered at 0.01, 0.1, 0.5, 1, 5, and 10 mg/kg of body weight/day was compared with ITRA administered at 10 and 30 mg/kg three times a day. The spleens and livers of mice that died or survived to day 50 were removed to measure the fungal burdens. Mice had greater than or equal to90% survival when they were treated with greater than or equal to0.5 mg of POSA per kg or 30 mg of ITRA per kg. Cultures of whole spleens and livers from mice treated with 10 mg of POSA per kg showed greater than or equal to70% sterilization. No sterilization of whole spleens and livers from mice treated with ITRA was seen. POSA displayed potent in vivo activity against the two strains of C immitis tested MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 39 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000175100800028 L2 - TRIAZOLE ANTIFUNGAL AGENT; IN-VITRO; AMPHOTERICIN-B; CRYPTOCOCCUS-NEOFORMANS; SCH-56592; ITRACONAZOLE; SCH56592; FLUCONAZOLE; EFFICACY; CANDIDA SO - Antimicrobial Agents and Chemotherapy 2002 ;46(5):1352-1356 5566 UI - 11365 AU - Gonzalez GM AU - Tijerina R AU - Sutton DA AU - Graybill JR AU - Rinaldi MG AD - Univ Autonoma Nuevo Leon, Dept Microbiol, Fac Med, Monterrey 64460, Nuevo Leon, MexicoS Texas Vet Hlth Care Syst, Audie L Murphy Div, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, Testing Lab, San Antonio, TX 78284, USAGonzalez, GM, Univ Autonoma Nuevo Leon, Dept Microbiol, Fac Med, Madero & Dr Eduardo A Pequeno S-N,Colonia Mitras, Monterrey 64460, Nuevo Leon, Mexico TI - In vitro activities of free and lipid formulations of amphotericin B and nystatin against clinical isolates of Coccidioides immitis at various saprobic stages AB - We investigated the susceptibilities of hyphal, mixed hyphal, ungerminated arthroconidial, and germinated arthroconidial populations of Coccidioides immitis to lipid formulations of amphotericin B and nystatin and their conventional preparations, utilizing the National Committee for Clinical Laboratory Standards M38-P broth macrodilution method. The differences in effects of the three different growth stages of the saprobic phase of C. immitis on the MIC/minimum lethal concentration (MLC) ratio were not statistically significant for any of the antifungal agents tested. These results suggest that either inocula could be used for in vitro susceptibility studies with C. immitis MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000175100800066 L2 - FILAMENTOUS FUNGI; ANTIFUNGAL AGENTS; INOCULUM; SUSCEPTIBILITIES; CONIDIA SO - Antimicrobial Agents and Chemotherapy 2002 ;46(5):1583-1585 5567 UI - 11138 AU - Gonzalez LM AU - Montero E AU - Puente S AU - Lopez-Velez R AU - Hernandez M AU - Sciutto E AU - Harrison LJS AU - Parkhouse RME AU - Garate T AD - Univ Edinburgh, Dept Trop Anim Hlth, Sir Alexander Robertson Ctr Trop Vet Med, Roslin EH25 9RG, Midlothian, ScotlandInst Salud Carlos III, Ctr Nacl Microbiol, Madrid, SpainInst Salud Carlos III, Ctr Invest Clin, Madrid, SpainHosp Ramon y Cajal, E-28034 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoGulbenkian Inst Sci, P-2781 Oeiras, PortugalHarrison, LJS, Univ Edinburgh, Dept Trop Anim Hlth, Sir Alexander Robertson Ctr Trop Vet Med, Roslin EH25 9RG, Midlothian, Scotland TI - PCR tools for the differential diagnosis of Taenia saginata and Taenia solium taeniasis/cysticercosis from different geographical locations AB - The potential value of PCRs in the species-specific diagnosis of Taenia saginata and Taenia solium have been investigated, using of T. saginata and T. solium from different geographical areas. The PCRs examining inter-species differences were based on the sequence of the HDP2 DNA fragment, specific for T. saginata/T. solium, and the sequence of the rDNA internal transcribed spacer 1 and spacer 2 (ITS-1 and ITS-2). This PCR analysis of DNA isolates confirmed morphologic diagnosis and allowed the speciation of samples too small or fragmented for morphologic identification, with clear and consistent inter-species differences between T. saginata (twenty-two) and T. solium (three) geographical isolates. Possible intra-species genomic variability, within these species, was similarly studied through analysis of PCR amplification products (PCR-RFLP) and only encountered one exceptional T saginata isolate from Kenya, which yielded a unique PCR-RFLP pattern, different from T. saginata DNA of Mexican (one sample) and Spanish (seven samples) origin. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Portugal MH - United Kingdom MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0732-8893 UR - ISI:000175580300004 L2 - Taenia solium;Taenia saginata;differential diagnosis;multiplex-PCR;PCR;PCR-RFLP;POLYMERASE CHAIN-REACTION; RIBOSOMAL DNA; ASSAY; NEUROCYSTICERCOSIS; INFECTION; STRAINS; CESTODE; HUMANS; PROBES; RFLP SO - Diagnostic Microbiology and Infectious Disease 2002 ;42(4):243-249 5568 UI - 10134 AU - Gonzalez MP AU - Navarro R AU - Saucedo I AU - Avila M AU - Revilla J AU - Bouchard C AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36040, MexicoGIRSACO, Ctr Invest & Desarrollo, Mexico City 52000, DF, MexicoUniv Laval, Dept Civil Engn, Quebec City, PQ G1K 7P4, CanadaNavarro, R, Univ Guanajuato, Inst Invest Cient, Cerro Venada S-N, Guanajuato 36040, Mexico TI - Purification of phosphoric acid solutions by reverse osmosis and nanofiltration AB - Purification of phosphoric acid by reverse osmosis (RO) and nanofiltration (NF) was studied using different commercial membranes of common industrial use. Both techniques represent an interesting alternative in purifying industrial phosphoric acid solutions. RO is a good choice to purify solutions up to a concentration of 2 M. Among the RO membranes, SX01 (Osmonics) yields the best global performance: permeate flux of 13.5 L/m(2)h, at 1800 psi, 46.3% of acid permeation and 99.3% of global rejection of cationic impurities. The performance of membrane was better by applying a simple pretreatment with a solution of phosphoric acid/ethanol/water. However, NF is a better alternative since it can yield good results at concentrations up to 8 M. The DS5DL (Osmonics) is the NF membrane with the best global performance: permeate flux of 3.02 L/m(2)h at 1000 psi, 94.2% of acid permeation and 99.2% of cationic impurities rejection MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Chemical;Water Resources U5 - J;Article AV - English IS - 0011-9164 UR - ISI:000178455100051 L2 - phosphoric acid purification;reverse osmosis;nanofiltration SO - Desalination 2002 ;147(1-3):315-320 5569 UI - 12173 AU - Gonzalez R AU - Rieumont J AU - Figueroa JM AU - Siller J AU - Gonzalez H AD - Univ La Habana, Fac Quim, IMRE, Havana 10400, CubaInst Politecn Nacl, CICATA, Mexico City 11500, DF, MexicoGonzalez, R, Univ Havana, Fac Chem, Havana 10400, Cuba TI - Kinetics of furfuryl alcohol polymerisation by iodine in methylene dichloride AB - The kinetic studies of furfuryl alcohol polymerisation by iodine in methylene dichloride showed a pseudo-first-order behaviour in monomer. The pseudo-first-order constant obtained varies linearly with the concentration of iodine. Our previous work on the system concluded for a pseudo-cationic polymerisation mechanism based on the admission of non-ionic propagating species. The good fitting among the experimental monomer concentration data and the one obtained from computer simulation justifies the mechanism proposed for the system. The set of estimated values of the rate parameters is also reported. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000172760100010 L2 - furfuryl alcohol;iodine;modelling;pseudo-cationic polymerisation;TRIFLUOROACETIC-ACID; POLYMERIZATION SO - European Polymer Journal 2002 ;38(2):281-286 5570 UI - 12174 AU - Gonzalez R AU - Figueroa JM AU - Gonzalez H AD - Univ Havana, Fac Chem, IMRE, Havana 10400, CubaNatl Polytechn Inst, Res Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoGonzalez, R, Univ Havana, Fac Chem, IMRE, Havana 10400, Cuba TI - Furfuryl alcohol polymerisation by iodine in methylene chloride AB - Furforyl alcohol (FA) was polymerised by iodine in methylene chloride to give a coloured, amorphous and branched polymer. Structure of FA polymers obtained with iodine have no significant differences according to the IR and NMR spectra respect to those obtained by using Bronsted or Lewis acids as initiators. Changes on the experimental conditions, such as the presence of air, iodine concentration or reaction temperature, did not lead to an increase in the linear structure of the polymer. On the contrary, an increase in the iodine concentration or in the temperature produces a highly crosslinked polymer. DSC of the polymer indicates that remaining groups are able to undergo further exothermic reactions and crosslinking. A mechanism of polymerisation was proposed to explain all the above features. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000172760100011 L2 - polyfurfuryl alcohol;branched structures;polyunsaturated sequences;amorphous structure;reaction mechanism;pseudocationic polymerisation;TRIFLUOROACETIC-ACID; POLYMERIZATION SO - European Polymer Journal 2002 ;38(2):287-297 5571 UI - 10486 AU - Gonzalez S AU - Sousa C AU - Fernandez-Garcia M AU - Bertin V AU - Illas F AD - Univ Barcelona, Dept Quim Fis, Ctr Especial Recerca Quim Teor, E-08028 Barcelona, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, SpainIllas, F, Univ Barcelona, Dept Quim Fis, Ctr Especial Recerca Quim Teor, Parc Cientif Barcelona,C Marti I Franques 1, E-08028 Barcelona, Spain TI - Theoretical study of the catalytic activity of bimetallic RhCu surfaces and nanoparticles toward H-2 dissociation AB - First principles based density functional methods and theoretical models have been used to investigate the reactivity of different RhCu alloys toward molecular hydrogen dissociation. For pure Rh(111), it is predicted that H-2 can either dissociate spontaneously or be physisorbed as molecular hydrogen. These predictions agree with recent experimental findings. The simple addition of a Cu atom to a Rh-rich environment is enough to eliminate the presence of the energy minimum associated with molecularly adsorbed hydrogen and to convert H-2 dissociation in an activated process. From the present results it is concluded that increasing the Cu content may lead to a change in the active site and permits us to speculate about the enhancement on the irreversible hydrogen uptake on going from Rh to RhCu alloys with a small Cu content MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000177354000017 L2 - PDCU(111) SURFACES; BINDING-ENERGIES; MGO(001) SURFACE; ADSORPTION; CO; ALLOYS; PD; HYDROGEN; SYSTEMS; BOND SO - Journal of Physical Chemistry B 2002 ;106(32):7839-7845 5572 UI - 11105 AU - Gonzalez SB AU - Bandoni AL AU - van Baren C AU - Lira PD AU - Cerda-Garcia-Rojas CM AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Patagonia, Fac Ciencias Nat, Catedra Quim Organ, RA-9200 Esquel, Chubut, ArgentinaUniv Buenos Aires, Fac Farm & Bioquim, Catedra Farmacognosia, RA-1113 Buenos Aires, DF, ArgentinaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - Structure, conformation and absolute configuration of novel bisnorsesquiterpenes from the Adesmia boronioides essential oil AB - Two novel bisnorsesquiterpenes (1R,4S,5R)-esquel-6-en-9-one (1) and (1R,4S,5S)-esquel-7-en-9-one (2) were isolated from the essential oil of Adesmia boronioides. Their structures and relative stereochemistry were elucidated by 1D and 2D NMR data, including carbon-carbon connectivity and NOESY experiments. The absolute configuration was determined by chemical conversion of 1 into phenol 6, whose Cotton effect was compared with that of cacalol. The conformational behavior of the new compounds containing the hydrindane skeleton was studied by molecular mechanics. Compound 1 possesses a very pleasant fruity odor. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000175580900018 L2 - bisnorsesquiterpenes;stereochemistry;conformation;molecular mechanics;absolute configuration;Adesmia boronioides SO - Tetrahedron 2002 ;58(15):3065-3071 5573 UI - 11574 AU - Good-Avila SV AU - Stephenson AG AD - Penn State Univ, Dept Biol, Mueller Lab 208, University Pk, PA 16802, USAGood-Avila, SV, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, AP Postal 70-275, Mexico City 04510, DF, Mexico TI - The inheritance of modifiers conferring self-fertility in the partially self-incompatible perennial, Campanula rapunculoides L. (Campanulaceae) AB - The role of partial self-incompatibility in plant breeding system evolution has received little attention. Here, we examine the genetic basis of modifiers conferring self-fertility in the creeping bellflower, Campanula rapunculoides L, (Campanulaceae), a partially self-incompatible herb. A survey of 35 individuals from two natural populations indicates that 45% of them are strongly self-incompatible, 40% intermediately self-incompatible, and 15% weakly self-incompatible and that some plants show a strong breakdown in self-incompatibility over floral age. We generated 101 F-1 families by random crossing among 31 parental plants and estimated the heritability of self-fertility in day 1 and day 4 female-phase flowers, the genetic correlation between day 1 and day 4 self-fertility, and the coefficient of additive genetic variance of self-fertility. We use linear regression and data from additional crosses to examine whether there are significant maternal effects in the expression of self-fertility. We use Fain's test to determine if a major gene influences self-fertility and, finding no evidence, use data from additional crosses on an F-2 generation to estimate the mean number and dominance of genes conferring self-fertility. These analyses indicate that the heritability (h(2)) of self-fertility is 0.24 in day 1 female-phase flowers and 0.44 in day 4 flowers, self-fertility is primarily additive but shows some recessive effects, and self-fertility is estimated to be controlled by four genetic factors. In addition, we have evidence that there may be maternal effects for self-fertility, especially for weakly self-incompatible plants. The significance of these results in the context of mating system evolution is discussed MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 20 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000174486200005 L2 - breeding system;gene number;heritability;maternal effects;partial self-incompatibility;self-fertility;NEMESIA-STRUMOSA BENTH; INBREEDING DEPRESSION; QUANTITATIVE GENETICS; FLORAL TRAITS; LYCOPERSICON-PERUVIANUM; COMPATIBILITY; EVOLUTION; PLANTS; FERTILIZATION; POPULATIONS SO - Evolution 2002 ;56(2):263-272 5574 UI - 9466 AU - Gorelik J AU - Gu YC AU - Spohr HA AU - Shevchuk AI AU - Lab MJ AU - Harding SE AU - Edwards CRW AU - Whitaker M AU - Moss GWJ AU - Benton DCH AU - Sanchez D AU - Darszon A AU - Vodyanoy I AU - Klenerman D AU - Korchev YE AD - Univ London Imperial Coll Sci Technol & Med, MRC, Ctr Clin Sci, Div Med, London W12 ONN, EnglandImperial Coll Sci Technol & Med, Natl Heart & Lung Inst, MRC Clin Sci Ctr, London W12 ONN, EnglandUniv Newcastle, Dept Physiol Sci, Newcastle Upon Tyne, Tyne & Wear, EnglandUniv Coll London, Dept Pharmacol, London, EnglandNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Cuernavaca, Morelos, MexicoOff Naval Res, Arlington, VA 22217, USAUniv Cambridge, Dept Chem, Cambridge CB2 1EW, EnglandKorchev, YE, Univ London Imperial Coll Sci Technol & Med, MRC, Ctr Clin Sci, Div Med, Hammersmith Campus,5th Floor,DuCane Rd, London W12 ONN, England TI - Ion channels in small cells and subcellular structures can be studied with a smart patch-clamp system AB - We have developed a scanning patch-clamp technique that facilitates single-channel recording from small cells and submicron cellular structures that are inaccessible by conventional methods. The scanning patch-clamp technique combines scanning ion conductance microscopy and patch-clamp recording through a single glass nanopipette probe. In this method the nanopipette is first scanned over a cell surface, using current feedback, to obtain a high-resolution topographic image. This same pipette is then used to make the patch-clamp recording. Because image information is obtained via the patch electrode it can be used to position the pipette onto a cell with nanometer precision. The utility of this technique is demonstrated by obtaining ion channel recordings from the top of epithelial microvilli and openings of cardiomyocyte T-tubules. Furthermore, for the first time we have demonstrated that it is possible to record ion channels from very small cells, such as sperm cells, under physiological conditions as well as record from cellular microstructures such as submicron neuronal processes MH - United Kingdom MH - Mexico|Morelos MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 22 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000180256300033 L2 - GLUTAMATE-RECEPTOR ACTIVATION; CARDIAC MYOCYTES; CONDUCTANCE MICROSCOPY; SPATIAL-DISTRIBUTION; SYMPATHETIC NEURONS; SPERMATOGENIC CELLS; SODIUM-CHANNELS; MUSCLE-FIBERS; CA2+ CHANNELS; K+ CHANNELS SO - Biophysical Journal 2002 ;83(6):3296-3303 5575 UI - 10339 AU - Gorin T AU - Seligman TH AD - Univ Freiburg, Fak Phys, D-79104 Freiburg, GermanyUniv Mexico, UNAM, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoGorin, T, Univ Freiburg, Fak Phys, Hermann Herder Str 3, D-79104 Freiburg, Germany TI - A random matrix approach to decoherence AB - In order to analyse the effect of chaos or order on the rate of decoherence in a subsystem, we aim to distinguish the effects of the two types of dynamics by choosing initial states as random product states from two factor spaces representing two subsystems. We introduce a random matrix model that allows us to vary the coupling strength between the subsystems. The case of strong coupling is analysed in detail, and we find no significant differences except for very low-dimensional spaces MH - Germany MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 13 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000177793900026 L2 - decoherence;purity;random matrix theory;CHAOTIC BEHAVIOR; SYSTEMS; TRANSITION; SPECTRA; MOTION SO - Journal of Optics B-Quantum and Semiclassical Optics 2002 ;4(4):S386-S392 5576 UI - 11068 AU - Gorin T AD - Univ Mexico UNAM, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoUniv Freiburg, Fak Phys, D-79104 Freiburg, GermanyGorin, T, Univ Mexico UNAM, Ctr Ciencias Fis, Ave Univ S-N, Cuernavaca 62210, Morelos, Mexico TI - Integrals of monomials over the orthogonal group AB - A recursion formula is derived which allows one to evaluate invariant integrals over the orthogonal group O(N), where the integrand is an arbitrary finite monomial in the matrix elements of the group. The value of such an integral is expressible as a finite sum of partial fractions in N. The recursion formula largely extends presently available integration formulas for the orthogonal group. (C) 2002 American Institute of Physics MH - Germany MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000175746200031 L2 - MATRIX SO - Journal of Mathematical Physics 2002 ;43(6):3342-3351 5577 UI - 11705 AU - Gorin T AU - Seligman TH AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoGorin, T, Univ Freiburg, Hermann Herder Str 3, D-79104 Freiburg, Germany TI - Signatures of the correlation hole in total and partial cross sections AB - In a complex scattering system with few open channels, say a quantum dot with leads, the correlation properties of the poles of the scattering matrix are most directly related to the internal dynamics of the system. We may ask how to extract these properties from an analysis of cross sections. In general this is very difficult, if we leave the domain of isolated resonances. We propose to consider the cross correlation function of two different elastic or total cross sections. For these we can show numerically and to some extent also analytically a significant dependence on the correlations between the scattering poles. The difference between uncorrelated and strongly correlated poles is clearly visible, even for strongly overlapping resonances MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000174038300064 L2 - COMPOUND-NUCLEUS REACTIONS; STATISTICAL PROPERTIES; S-MATRIX; SCATTERING; SPECTRA; SYSTEMS; FLUCTUATIONS; RESONANCES; BEHAVIOR SO - Physical Review e 2002 ;65(2): 5578 UI - 11837 AU - Gorley PM AU - Horley PP AU - Gonzalez-Hernandez J AU - Vorobiev YV AD - Chernivtsi State Univ, UA-58012 Chernovtsy, UkraineCINVESTAV, IPN Unidad Queretaro, Queretaro 76001, MexicoGorley, PM, Chernivtsi State Univ, Kotsyubynsky Str 2, UA-58012 Chernovtsy, Ukraine TI - Self-organization processes in semiconductor under photo-induced Gunn effect AB - Theoretical investigation of self-organization of non-equilibrium carriers system in n-GaAs under photo-stimulated Gunn effect was performed. It was shown that the behavior of carrier system could be controlled using incident light intensity resulting in different oscillation regimes. Results obtained allow us to predict application ranges for devices working on the phenomena investigated. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Queretaro MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000173616300036 L2 - self-organization;Gunn effect;semiconductor;non-linear system;n-GaAs SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2002 ;88(2-3):286-291 5579 UI - 11981 AU - Gorokhovsky A AU - Escalante-Garcia JI AU - Gorokhovsky V AU - Mescheryakov D AD - Cinvestav Unidad Saltillo, Dept Engn Ceram, Saltillo, Coahuila, MexicoSaratov State Tech Univ, Dept Bldg Mat, Saratov 410054, RussiaGorokhovsky, A, Cinvestav Unidad Saltillo, Dept Engn Ceram, Saltillo, Coahuila, Mexico TI - Inorganic wastes in the manufacture of glass and glass-ceramics: Quartz-feldspar waste of ore refining, metallurgical slag, limestone dust, and phosphorus slurry AB - This work presents the results of an investigation on producing diopside glass-ceramic materials based on various combinations of quartz-feldspar waste from ore refining and limestone dust. Other industrial wastes were added to contribute as nucleation agents; when the concentration of the latter was Insufficient, they were added in the pure state. Additionally, relatively high concentrations of alkalis were used to accelerate glass melting. Low-cost materials with promising exploitation properties were produced. A two-stage regime of crystallization of the basic glass composition was determined, including nucleation at 720degreesC and crystal growth at 950degreesC. Local environmental regulations must be considered for the selection of the type of admixtures and the combination of wastes MH - Mexico|Coahuila MH - Russia PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000173250800058 L2 - CRYSTALLIZATION; NUCLEATION SO - Journal of the American Ceramic Society 2002 ;85(1):285-287 5580 UI - 9558 AU - Gorokhovsky AV AU - Escalante-Garcia JI AU - Mendez-Nonell J AU - Gorokhovsky VA AU - Mescheryakov DV AD - Ctr Res & Adv Studies Cinvestav, Coahuila 2500, MexicoSaratov State Tech Univ, Saratov, RussiaGorokhovsky, AV, Ctr Res & Adv Studies Cinvestav, Apartado Postal 663, Coahuila 2500, Mexico TI - Foamed glass-ceramic materials based on oil shale by-products AB - The feasibility and features of the production of foamed glass-ceramic materials based on oil shale ash were investigated. The optimal regime of synthesis found involved the following steps: glass fusion at 1400degreesC, preparation of the glass powders and blending with the foaming agent. The foaming was carried out at 900 to 920degreesC with a further one-stage crystallization at 790 to 820degreesC. It was noted that the admixture of calcium carbonate, as a foaming agent, changed the phase composition of the resulting glass-ceramics by an increased rate of the crystallization process and the intensive formation of gehlenite simultaneously with diopside MH - Mexico|Coahuila MH - Russia PB - FRANKFURT: VERLAG DEUTSCHEN GLASTECHNISCHEN RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0946-7475 UR - ISI:000179934500006 L2 - WASTES SO - Glass Science and Technology 2002 ;75(5):259-262 5581 UI - 10780 AU - Gorrochotegui-Escalante N AU - Gomez-Machorro C AU - Lozano-Fuentes S AU - Fernandez-Salas I AU - Munoz MD AU - Farfan-Ale JA AU - Garcia-Rejon J AU - Beaty BJ AU - Black WC AD - Colorado State Univ, Dept Microbiol, Ft Collins, CO 80523, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Biol Mol, Mexico City, DF, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Entomol Med, Monterrey, MexicoUniv Automoma Yucatan, Lab Arbovirol, Merida 9700, VenezuelaBlack, WC, Colorado State Univ, Dept Microbiol, Ft Collins, CO 80523 USA TI - Breeding structure of Aedes aegypti populations in Mexico varies by region AB - A population genetic analysis of Aedes aegypti was conducted among 38 collections from throughout coastal regions of Mexico. Multiple collections were made within 5 cities to examine local patterns of gene How. Single-strand conformation polymorphism analysis was used to screen for variation in a 387-bp region of the Nicotinamide Adenine Dinucleotide Dehydrogenase subunit 4 mitochondrial gene (ND4) and 25 haplotypes were detected. Northeastern Mexico collections were genetically differentiated from and had lower genetic diversity than Yucatan and Pacific coastal collections. Yucatan and Pacific collections were genetically homogeneous. Regression analysis of geographic distances and F., values indicated that collections were genetically isolated by distance in the Pacific and the Yucatan, but not among collections in the northeast. Free gene flow occurred among all collections within 130 km of one another in the northeast and within 180 km in the Yucatan. F, values were never large among Pacific collections, suggesting extensive gene flow along the Pacific coast MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA MH - Venezuela PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 20 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000176717600020 L2 - DNA; GENETICS; DISTANCE; GENES; SSCP SO - American Journal of Tropical Medicine and Hygiene 2002 ;66(2):213-222 5582 UI - 9456 AU - Gould H AU - Ellertson C AU - Corona G AD - Populat Council, Reg Off Latin Amer & Caribbean, Mexico City, DF, MexicoUniv Calif Berkeley, Sch Publ Hlth, Dept Maternal & Child Hlth, Berkeley, CA 94720, USATrstamos Funcionando AC, Mexico City, DF, MexicoEllertson, C, Populat Council, Reg Off Latin Amer & Caribbean, Mexico City, DF, Mexico TI - Knowledge and attitudes about the differences between emergency contraception and medical abortion among middle-class women and men of reproductive age in Mexico City AB - Two reproductive technologies-emergency contraception and medical abortion-have the potential to reduce unintended pregnancy significantly in Latin America. Lack of knowledge and negative attitudes about the methods may limit their impact, however. Results from focus group discussions' with middle-class men and women of reproductive age residing in Mexico City indicate that knowledge about emergency contraception and medical abortion is low. After being informed about both methods, participants supported emergency contraception but tied their support for medical abortion to its legal status. Participants remained concerned about the methods' efficacy, mechanism of action, and potential to encourage sexual risk-taking: While almost all desired greater dissemination of information about and access to both methods in Mexico, participants cited religious and cultural concerns, as well as barriers in communication with providers and within families, as significant challenges. Participants hoped, however, that both emergency contraception and medical abortion might play important roles in preventing unwanted pregnancy and abortion-related morbidity and mortality in Mexico in the future. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 8 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000180245300006 L2 - emergency contraception;post-coital contraception;medical abortion;mifepristone;misoprostol;Mexico;ADVANCE PROVISION; ACCEPTABILITY; MISOPROSTOL; PROVIDERS; EFFICACY; USERS; PILLS; CHINA; INDIA; CUBA SO - Contraception 2002 ;66(6):417-426 5583 UI - 11262 AU - Gracia-Fadrique J AU - Brocos P AU - Pineiro A AU - Amigo A AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Lab Superficies, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Fac Fis, Dept Fis Aplicada, E-15782 Santiago De Compostela, SpainGracia-Fadrique, J, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Lab Superficies, Mexico City 04510, DF, Mexico TI - Activity coefficients at infinite dilution from surface tension data AB - A method for calculating activity coefficients at infinite dilution from surface tension data is derived from the conditions for equilibrium between surface and bulk phases rather than from the conditions for liquid-vapor or liquid-liquid equilibrium, as is more usual. Specifically, the method combines the Volmer surface equation of state and the Gibbs adsorption equation to derive an expression for the surface chemical potential. The key operation of this treatment is the choice of the same reference state for both bulk and surface phases. The gamma (infinity) values calculated for systems for which suitable data are available in the literature agree well with values obtained by other methods MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000175289600035 L2 - PROTEIN DENATURANTS; AQUEOUS-SOLUTIONS; WATER; MIXTURES SO - Langmuir 2002 ;18(9):3604-3608 5584 UI - 12210 AU - Graczyk J AU - Gonzalez-Alvarez A AU - Arellano M AU - Buggisch H AD - Univ Karlsruhe, Inst Mecchan Verfahrenstech & Mech, D-76126 Karlsruhe, Germany. Univ Guadalajara, Dept Ingn Quim, CUCEI, Guadalajara, Jalisco, Mexico TI - Characterization of wall slip in extrusion of ceramic pastes AB - The flow properties of pastes; particularly, the wall slip properties are very significant in extrusion processes. These properties must be determined experimentally. In this work a new experimental method of local wall slip characterization is presented. A capillary rheometer transparent wall die has been developed to characterize the slip velocity of pastes. Six pressure sensors and a CCD - camera were used to follow the evolution of the extrusion pressure drop and the images of colour marked flow profiles. Thus, the slip velocity could be determined at certain point along the die wall as a function of extrudate velocity or shear stress. The wall slip behaviour of pastes of aluminium. oxide - hydroxide in silicone oil have been tested as a sample system. The influence of several parameters as solid phase concentration, extrudate velocity, and the die dimensions on wall slip velocity has been verified MH - Germany MH - Mexico|Jalisco T3 - EURO CERAMICS VIIKey engineering materials PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics; Materials Science, Composites U5 - S;Article NT - SEnglishArticle2BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDKEY ENG MATBT32X AV - English IS - 1013-9826 UR - ISI:000172651400081 L2 - ceramic paste;flow properties;extrusion;wall slip;flow visualization SO - 2002 ;():321-324 5585 UI - 9358 AU - Graham C AU - Martinez-Leyva JE AU - Cruz-Paredes L AD - Univ Missouri, Dept Biol, St Louis, MO 63121, USAUniv Veracruzana, Xalapa 91000, Veracruz, MexicoGraham, C, Univ Calif Berkeley, Museum Vertebrate Zool, 3101 Valley Life Sci Bldg, Berkeley, CA 94720 USA TI - Use of fruiting trees by birds in continuous forest and riparian forest remnants in Los Tuxtlas, Veracruz, Mexico AB - The composition of plant species in fragmented landscapes may be influenced by the pattern of visitation by birds to fruiting trees and by the movement of seeds among and within fragments. We compared bird visitation patterns to two tree species (Dendropanax arboreus, Araliaceae; Bursera simaruba, Burseraceae) in continuous forest and remnants of riparian vegetation in a region dominated by pasture in Los Tuxtlas, Veracruz, Mexico. We quantified frequency of visitation, fruit consumption, consistency of visitation (percentage of total tree observation periods during which a given bird species was recorded), and species composition of birds at individuals of both tree species in continuous forest and riparian remnants. Bird visitation rate, species richness, and fruit consumption rates were similar within both tree species in the two habitats. Species assemblages at D. arboreus were different between continuous forest and remnants. Species assemblages at B. simaruba did not differ by habitat. Our results demonstrate that habitat disturbance may influence avian visitation patterns, which may in turn affect subsequent recruitment patterns in some tree species. Our results, however, were not consistent between the tree species, suggesting that it is difficult to generalize concerning the effects of forest disturbance on avian species assemblages in fruiting trees MH - USA MH - Mexico|Veracruz PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 9 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000180539800012 L2 - avian fragivores;Bursera;Dendropanax;forest remnants;fragmentation;Mexico;seed dispersal;tree visitation;tropical forest;SEED DISPERSAL; MONTANE FOREST; FRUGIVOROUS BIRDS; ATLANTIC FOREST; FRAGMENTATION; PLANT; LANDSCAPE; BURSERA; MANAGEMENT; DIVERSITY SO - Biotropica 2002 ;34(4):589-597 5586 UI - 11139 AU - Graham DR AU - Lucasti C AU - Malafaia O AU - Nichols RL AU - Holtom P AU - Perez NQ AU - McAdams A AU - Woods GL AU - Ceesay TP AU - Gesser R AD - Springfield Clin, Springfield, IL 62703, USAS Jersey Infect Dis, Somers Point, NJ, USATulane Univ, Sch Med, New Orleans, LA 70112, USAUniv So Calif, Med Ctr, Los Angeles, CA 90033, USAHosp Evangelico, Curitiba, Parana, BrazilHosp Civil Guadalajara, Mexico City, DF, MexicoMerck Res Labs, W Point, PA, USAGraham, DR, Springfield Clin, 1025 S 7th St, Springfield, IL 62703, USA TI - Ertapenem once daily versus piperacillin-tazobactam 4 times per day for treatment of complicated skin and skin-structure infections in adults: Results of a prospective, randomized, double-blind multicenter study AB - We conducted a prospective, randomized, double-blind trial comparing ertapenem (1 g once daily) with piperacillin-tazobactam (3.375 g every 6 h) as parenteral treatment for 540 adults with complicated skin and skin-structure infections. The most common diagnoses were skin or soft-tissue abscesses and lower-extremity infections associated with diabetes. The mean duration (+/-standard deviation) of therapy was days 9.1 +/- 3.1 days for ertapenem and 9.8 +/- 3.3 days for piperacillin-tazobactam. At the assessment of primary efficacy end point, 10-21 days after treatment, 82.4% of those who received ertapenem and 84.4% of those who received piperacillin-tazobactam were cured. The difference in response rates, adjusting for the patients' assigned strata, was -2.0% (95% confidence interval, -10.2% to 6.2%), indicating that the response rates in the 2 treatment groups were equivalent. Cure rates for the 2 treatment groups were similar when compared by stratum, diagnosis, and severity of infection. The frequency and severity of drug-related adverse events were similar in the treatment groups MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 45 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000175620900006 L2 - IN-VITRO ACTIVITIES; HOSPITALIZED-PATIENTS; MK-0826 SO - Clinical Infectious Diseases 2002 ;34(11):1460-1468 5587 UI - 11296 AU - Graham MF AU - Meaburn J AU - Garrington ST AU - O'Brien TJ AU - Henney WJ AU - O'Dell CR AD - Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoVanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAGraham, MF, Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England TI - MERLIN radio detection of an interaction zone within a binary Orion proplyd system AB - Presented here are high angular resolution MERLIN 5 GHz (6 cm) continuum observations of the binary proplyd system LV 1 in the Orion nebula, which consists of proplyd 168-326 SE and its binary proplyd companion 168-326 NW (separation 0."4). Accurate astrometric alignment allows a detailed comparison between these data and published Hubble Space Telescope (HST) PC Halpha and [O III] lambda5007 images. Thermal radio sources coincide with the two proplyds and originate in the ionized photoevaporating flows seen in the optical emission lines. Flow velocities of approximate to50 km s(-1) from the ionized proplyd surfaces and greater than or equal to100 km s(-1) from a possible microjet have been detected using the Manchester echelle spectrometer. A third radio source is found to coincide with a region of extended, high-excitation, optical line emission that lies between the binary proplyds 168-326 SE/326 NW. This is modeled as a bow shock caused by the collision of the photoevaporating flows from the two proplyds. Both a thermal and a nonthermal origin for the radio emission in this collision zone are considered MH - United Kingdom MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175309300020 L2 - circumstellar matter;HII regions;ISM : individual (Orion Nebula);radio continuum : ISM;stars : formation;TRAPEZIUM CLUSTER; NEBULA M42; HIGH-SPEED; TELESCOPE; DISKS; RESOLUTION; NGC-1976; OBJECTS; STARS; PROFILES SO - Astrophysical Journal 2002 ;570(1):222-230 5588 UI - 10023 AU - Gramatica L AU - Herrera MF AU - Mercado-Luna A AU - Sierra M AU - Verasay G AU - Brunner N AD - Clin Sucre, Dept Surg, Cordoba, ArgentinaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Surg, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Radiol, Mexico City, DF, MexicoGramatica, L, Clin Sucre, Dept Surg, Santa rosa 770,B Alberdi, Cordoba, Argentina TI - Videolaparoscopic resection of insulinomas: Experience in two institutions AB - Laparoscopic resection of islet cell tumors has been performed in some selected cases. The aim of the study was. to analyze the experience of two institutions in the laparoscopic management of insulinomas. In a 4-year period, videolaparoscopic resection of sporadic insulinomas was performed in 9 patients. All patients had hypoglycemia/hyperinsulinism 9 and a solitary tumor demonstrated by image studies,. Demographics, surgical findings,. results, and complications were analyzed. Mean age of the patients was 43 years. One patient was male and eight were females. One tumor was located in the head of the pancreas, 4 in the body, and 4 in the tail. Laparoscopic resection was completed in all patients. Procedures included 4 enucleations and 5 distal pancreatectomies. Pancreatic resection with splenic preservation was achieved in 4 cases. Intraoperative ultrasound Was used in 7 patients. Mean size of the tumors was 1.6 cm. All patients became normoglycemic after surgery. Complications included one pancreatic fistula, one pleural effusion, and one peripancreatic fluid collection. All resolved spontaneously. In a follow-up period between 3 and 48 months no evidence of recurrence has been observed. This series supports laparoscopic resection of preoperatively localized benign solitary insulinomas. The operation provides the advantages of minimally invasive surgery and can be safely performed in most cases MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 34 U4 - Surgery U5 - J;Article AV - English IS - 0364-2313 UR - ISI:000178581400023 L2 - ISLET-CELL TUMORS; INTRAOPERATIVE ULTRASONOGRAPHY; ENDOSCOPIC ULTRASONOGRAPHY; LOCALIZATION; PANCREAS; STIMULATION; CALCIUM SO - World Journal of Surgery 2002 ;26(10):1297-1300 5589 UI - 9806 AU - Grevy JM AU - Tellez F AU - Bernes S AU - Noth H AU - Contreras R AU - Barba-Behrens N AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62000, Morelos, MexicoUAP, IC, Ctr Quim, Puebla 72000, MexicoUniv Munich, Dept Inorgan Chem, D-81377 Munich, GermanyUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoContreras, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - Coordination compounds of thiabendazole with main group and transition metal ions AB - We report li-i, na-i, k-i, pb-ii, co-ii, ni-ii, cu-ii, zn-ii, cd-ii and hg-ii coordination compounds derived from thiabendazole [2-(4'-Thiazolyl)Benzimidazole (Tbz)]. The compounds were characterised by analytical and spectroscopic techniques. Nmr studies of diamagnetic compounds were performed in solution. X-ray diffraction analysis of na-i, pb-ii, co-ii, ni-ii, cu-ii and cd-ii complexes showed that tbz stabilises bis- and tris-chelated coordination compounds. In solution and in solid state the ligand coordinates to the metal ions through the imidazolic and thiazole nitrogen atoms regardless of the nature of the metal ion. (C) 2002 Elsevier science b.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Puebla PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000179281100064 L2 - alkaline metal;lead;transition metal;coordination compounds;thiabendazole;RAY CRYSTAL-STRUCTURES; LEWIS-BASE ADDUCTS; X-RAY; SPECTROSCOPIC CHARACTERIZATION; LEAD(II) COMPOUNDS; SOLID-STATE; SODIUM; COMPLEXES; 2-GUANIDINOBENZIMIDAZOLE; CHEMISTRY SO - Inorganica Chimica Acta 2002 ;339():532-542 5590 UI - 11668 AU - Grismer LL AU - Wong H AU - Galina-Tessaro P AD - La Sierra Univ, Dept Biol, Riverside, CA 92515, USACtr Invest Biol Noroeste SC, Div Biol Terrestre, La Paz 23000, Baja California, MexicoGrismer, LL, La Sierra Univ, Dept Biol, Riverside, CA 92515, USA TI - Geographic variation and taxonomy of the sand snakes, Chilomeniscus (Squamata : Colubridae) AB - We reevaluated geographic variation and taxanomy in the colubrid genus Chilomeniscus. We used color pattern, head scale morphology, andscale and band counts in an attempt to differentiate the four currently recognized species: the unbanded C. stramineus, banded C. cinetus, and the banded insular forms C.punctatissimus and C. savagei. Because only head scale morphology could be used to discretely diagnose (i.e., no character state overlap) two of the four species ,we propose that the current evidence supports the recognition of C. savagei from Isla Cerralvo and two disjunct populations of C. stramineus, one ranging throughout the Baja California peninsula and the other occuring in arizona,U.S.A., and Sonora and Sinaloa, Mexico. We consider C. cinctus and C. punctatissimus to be junior synonyms of C. stramineus MH - Mexico|Baja California MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000174172700002 L2 - geographic variations;taxonomy;pattern classy;Baja California;sand snakes;Chilomeniscus cinctus;Chilomeniscus stramineus;Chilomeniscus punctatissimus;Chilomeniscus savagei SO - Herpetologica 2002 ;58(1):18-31 5591 UI - 9287 AU - Grooss JU AU - Gunther G AU - Konopka P AU - Muller R AU - McKenna DS AU - Stroh F AU - Vogel B AU - Engel A AU - Muller M AU - Hoppel K AU - Bevilacqua R AU - Richard E AU - Webster CR AU - Elkins JW AU - Hurst DF AU - Romashkin PA AU - Baumgardner DG AD - KFA Julich GmbH, Forschungszentrum, Inst Stratospher Chem ICG1, D-52425 Julich, GermanyUniv Frankfurt, Inst Meteorol, D-60325 Frankfurt, GermanyUSN, Res Lab, Washington, DC 20375, USANOAA, Aeron Lab, Boulder, CO 80303, USANOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80303, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoGrooss, JU, KFA Julich GmbH, Forschungszentrum, Inst Stratospher Chem ICG1, Postfach 1913, D-52425 Julich, Germany TI - Simulation of ozone depletion in spring 2000 with the Chemical Lagrangian Model of the Stratosphere (CLaMS) AB - Simulations of the development of the chemical composition of the Arctic stratosphere for spring 2000 are made with the Chemical Lagrangian Model of the Stratosphere (CLaMS). The simulations are performed for the entire Northern Hemisphere on four isentropic levels (400-475 K). The initialization in early February is based on observations made from satellite, balloon and ER-2 aircraft platforms. Tracer-tracer correlations from balloon-borne cryosampler (Triple) and ER-2 measurements, as well as tracer-PV correlations, are used to derive a comprehensive hemispherical initialization of all relevant chemical trace species. Since significant denitrification has been observed on the ER-2 flights, a parameterization of the denitrification is derived from NOy and N2O observations on board the ER-2 aircraft and the temperature history of the air masses under consideration. Over the simulation period from 10 February to 20 March, a chemical ozone depletion of up to 60% was derived for 425-450 K potential temperature. Maximum vortex-averaged chemical ozone loss rates of 50 ppb d(-1) or 4 ppb per sunlight hour were simulated in early March 2000 at the 425 and 450 K potential temperature levels. We show comparisons between the measurements and the simulations for the location of the ER-2 flight paths in late February and March and the location of the Triple balloon flight. The simulated tracer mixing ratios are in good agreement with the measurements. It was not possible to reproduce the exact details of the inorganic chlorine compounds. The simulation agrees with ClOx observations on the Triple balloon flight but overestimates for the ER-2 flights. The simulated ozone depletion agrees with estimates from other observations in the 425 and 450 K levels, but is underestimated on the 475 K level MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180466200092 L2 - stratosphere;ozone;ozone depletion;CLaMS;Lagrangian;denitrification;IN-SITU MEASUREMENTS; ARCTIC WINTER STRATOSPHERE; POLAR VORTEX; ER-2 AIRCRAFT; LOSS RATES; CLO; PHOTOCHEMISTRY; TROPOSPHERE; RADIATION; IMPACT SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D20): 5592 UI - 11125 AU - Grossman G AU - Luca F AD - Cent Michigan Univ, Dept Math, Mt Pleasant, MI 48859, USAUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoUniv Bielefeld, D-4800 Bielefeld, GermanyAcad Sci Czech Republ, Math Inst, Prague, Czech RepublicGrossman, G, Cent Michigan Univ, Dept Math, Mt Pleasant, MI 48859, USA TI - Sums of factorials in binary recurrence sequences AB - In this paper, we consider the problem of expressing a term of a given nondegenerate binary recurrence sequence as a sum of factorials. We show that if one bounds the number of factorials allowed, then there are only finitely many effectively computable terms which can be represented in this way. As an application, we also find the largest members of the classical Fibonacci and Lucas sequences which can be written as a sum or a difference of two factorials. (C) 2002 Elsevier Science (USA) MH - Czech Republic MH - Germany MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0022-314X UR - ISI:000175592900001 L2 - NUMBERS; FORMS SO - Journal of Number Theory 2002 ;93(2):87-107 5593 UI - 10393 AU - Grudsky SM AU - Vasilevski NL AD - Rostov Don State Univ, Dept Math, Rostov Na Donu 344711, RussiaInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoGrudsky, SM, Rostov Don State Univ, Dept Math, Rostov Na Donu 344711, Russia TI - Toeplitz operators on the Fock space: Radial component effects AB - The paper is devoted to the study of specific properties of Toeplitz operators with (unbounded, in general) radial symbols a=a(r). Boundedness and compactness conditions, as well as examples, are given. It turns out that there exist non-zero symbols which generate zero Toeplitz operators. We characterize such symbols, as well as the class of symbols for which T-a=0 implies a(r)=0 a.e. For each compact set M there exists a Toeplitz operator T-a such that sp T-a=ess-sp T-a=M. We show that the set of symbols which generate bounded Toeplitz operators no longer forms an algebra under pointwise multiplication. Besides the algebra of Toeplitz operators we consider the algebra of Weyl pseudodifferential operators obtained from Toeplitz ones by means of the Bargmann transform. Rewriting our Toeplitz and Weyl pseudodifferential operators in terms of the Wick symbols we come to their spectral decompositions MH - Mexico|Distrito Federal MH - Russia PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000177631100002 SO - Integral Equations and Operator Theory 2002 ;44(1):10-37 5594 UI - 11189 AU - Gruenhage G AU - Tkachuk VV AU - Wilson RG AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoAuburn Univ, Dept Math, Auburn, AL 36849, USAGruenhage, G, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Av Michoacan & Purisima,AP 55-532, Mexico City 09340, DF, Mexico TI - Weaker connected and weaker nowhere locally compact topologies for metrizable and similar spaces AB - We prove that any metrizable non-compact space has a weaker metrizable nowhere locally compact topology. As a consequence, any metrizable non-compact space has a weaker Hausdorff connected topology. The same is established for any Hausdorff space X with a sigma-locally finite base whose weight w(X) is a successor cardinal. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000175420700006 L2 - metrizable space;nowhere locally compact space;connected space;condensation SO - Topology and Its Applications 2002 ;120(3):365-384 5595 UI - 10208 AU - Grunwald NJ AU - Montes GR AU - Saldana HL AU - Covarrubias OAR AU - Fry WE AD - ARS, USDA, Prosser, WA 99350, USACEEM PICTIPAPA, Potato Late Blight Project, Metepec 52176, MexicoINIFAP, Metepec 52142, MexicoCornell Univ, Dept Plant Pathol, Ithaca, NY 14853, USAGrunwald, NJ, ARS, USDA, Prosser, WA 99350, USA TI - Potato late blight management in the Toluca Valley: Field validation of SimCast modified for cultivars with high field resistance AB - Management of potato late blight in the highland tropics is very costly and remains difficult. Reducing the impact of late blight through the use of resistant cultivars in combination with a fungicide forecasting system could lower the number of costly fungicide applications. Previously, we evaluated the fungicide advisory SimCast for use with Mexican cultivars of high levels of field resistance for use in the central highlands of Mexico and found that it predicted too many fungicide applications for cultivars of moderate to high levels of resistance. We adapted SimCast for cultivars with higher levels of resistance, and field validations conducted in 1999 and 2000 show that SimCast resulted in good disease control on cultivars ranging from susceptible to highly resistant. The number of fungicide applications forecast for cultivars with moderate to high levels of resistance was reduced. Precipitation was the environmental variable responsible for most of the forecasts made, Our work demonstrates that a predictive system can be portable from the temperate climate to a tropical highland climate. A user-friendly decision support system consisting of just a rain-gauge and the exclusive use of SimCast's fungicide units could be a valuable and affordable tool in managing potato late blight in the highland tropics MH - Mexico|Estado De Mexico MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000178170300017 L2 - epidemiology;plant pathogen;yield loss;PHYTOPHTHORA-INFESTANS POPULATIONS; CENTRAL MEXICO; FORECASTS SO - Plant Disease 2002 ;86(10):1163-1168 5596 UI - 10873 AU - Grunwald NJ AU - Hinojosa MAC AU - Covarrubias OR AU - Pena AR AU - Niederhauser JS AU - Fry WE AD - Cornell Univ, Dept Plant Pathol, Ithaca, NY 14853, USAINIFAP, Metepec 52142, Edo Mexico, MexicoGrunwald, NJ, USDA ARS, 24106 N Bunn Rd, Prosser, WA 99350, USA TI - Potato cultivars from the Mexican National Program: Sources and durability of resistance against late blight AB - The Mexican National Potato Program has produced several cultivars with high levels of field resistance. We evaluated the durability of resistance to potato late blight of a selection of 12 such cultivars using data from 1960 to the present. Data were extracted from the field notebooks located in the archives of the Mexican National Potato Program in the John S. Niederhauser Library in Toluca, Mexico. There was a trend indicating that field resistances to potato late blight of Mexican cultivars released between 1965 to 1999 were durable. At least two of the cultivars, namely 'Sangema' and 'Tollocan', have been gown on at least 4 to 5% of the potato acreage and over long periods of time without decay in levels of field resistance. Pedigrees of the 12 cultivars indicate that most of the field resistance was introgressed from Solanum demissum. Field resistance might also be derived from commonly grown land-race cultivars such as 'Amarilla de Puebla' and 'Leona'. These have been grown in Mexico since about the 1780s. They have the appearance of S. andigena-derived material but their genetic background is unknown MH - Mexico|Estado De Mexico MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Plant Sciences U5 - J;Letter AV - English IS - 0031-949X UR - ISI:000176399400001 L2 - breeding;germ plasm;Phytophthora infestans;S. tuberosum;PHYTOPHTHORA-INFESTANS POPULATIONS; NEVADO-DE-TOLUCA; GENERAL RESISTANCE; DISEASE RESISTANCE; FIELD RESISTANCE; WESTERN SLOPES; MONT DEBARY; SOLANUM; FUNGICIDE; VALLEY SO - Phytopathology 2002 ;92(7):688-693 5597 UI - 10120 AU - Gu J AU - Rihl M AU - Marker-Hermann E AU - Baeten D AU - Kuipers JG AU - Song YW AU - Maksymowych WP AU - Burgos-Vargas R AU - Veys EM AU - De Keyser F AU - Deister H AU - Xiong MM AU - Huang F AU - Tsai WC AU - Yu DTY AD - Univ Calif Los Angeles, Div Rheumatol, Rehabil Ctr 35 40, Los Angeles, CA 90095, USAUniv Texas, Ctr Human Genet, Houston, TX, USAUniv Mainz, D-6500 Mainz, GermanyHannover Med Sch, D-3000 Hannover, GermanyState Univ Ghent, B-9000 Ghent, BelgiumSeoul Natl Univ, Seoul, South KoreaUniv Alberta, Edmonton, AB, CanadaUniv Nacl Autonoma Mexico, Hosp Gen Mexico, Mexico City 04510, DF, MexicoChinese PLA Hosp, Beijing, Peoples R ChinaKaohsiung Med Univ, Kaohsiung, TaiwanYu, DTY, Univ Calif Los Angeles, Div Rheumatol, Rehabil Ctr 35 40, 1000 Vet Ave, Los Angeles, CA 90095 USA TI - Clues to pathogenesis of spondyloarthropathy derived from synovial fluid mononuclear cell gene expression profiles AB - Objective. To use gene expression profiles of spondyloarthropathy (SpA) synovial fluid mononuclear cells (SFMC) to determine if there are transcripts that support the unfolded protein response (UPR) hypothesis, and to identify which cytokines/chemokines are being expressed and which cell fractions are involved. Methods: Gene expression profiles were generated by microarray screening of SFMC of 5. patients with SpA, 5 patients with rheumatoid arthritis (RA), and peripheral blood mononuclear cells (PBMC) of 6 controls. Results were validated by reverse transcription polymerase chain reaction using samples from a larger panel of subjects. Results. The repertoires of proinflammatory cytokines/chemokines expressed by SpA and RA SFMC Were very similar: monocyte chemotractant protein I (MCP-1), interleukin 8 (IL-8), IL-1beta, endothelial-monocyte activating polypeptide 11, interferon-gamma, and tumor necrosis factor-alpha. MCP-1 was highly expressed in SpA SFMC. There was enhanced expression of immunoglobulin heavy chain binding protein (BiP) in SpA, which is compatible with the UPR hypothesis. BiP was most highly expressed in the adherent fraction of SpA SFMC. Conclusion. Previous data postulating UPR in SpA are based on in vitro experiments with transfected cell. lines. Our patient derived data suggest that it also occurs in vivo in the macrophages of SpA joints MH - Belgium MH - USA MH - Canada MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China MH - South Korea MH - Taiwan PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 20 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000178374000022 L2 - spondyloarthropathy;microarray;unfolded protein response;ANKYLOSING-SPONDYLITIS; ENDOPLASMIC-RETICULUM; RHEUMATOID-ARTHRITIS; REACTIVE ARTHRITIS; HLA-B27; SPONDYLARTHROPATHY; INDUCTION; CRITERIA; BIP SO - Journal of Rheumatology 2002 ;29(10):2159-2164 5598 UI - 10125 AU - Gu XY AU - Ma ZQ AU - Dong SH AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGu, XY, Inst High Energy Phys, Beijing 100039, Peoples R China TI - Exact solutions to the Dirac equation for a Coulomb potential in D+1 dimensions AB - The Dirac equation is generalized to D + 1 space-time. The conserved angular momentum operators and their quantum numbers are discussed. The eigenfunctions of the total angular momenta axe calculated for both odd D and even D cases. The radial equations for a spherically symmetric system are derived. The exact solutions for the system with a Coulomb potential axe obtained analytically. The energy levels and the corresponding fine structure axe also presented MH - Mexico|Distrito Federal MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 15 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0218-3013 UR - ISI:000178432700007 L2 - Dirac equation;D+1 dimensions;exact solutions;SO(D) group;HYDROGEN-ATOM; SPHERE SO - International Journal of Modern Physics E-Nuclear Physics 2002 ;11(4):335-346 5599 UI - 11585 AU - guado-Santacruz GA AU - Garcia-Moya E AU - Creque JA AU - Meyer S AU - Flores-Flores JL AD - Inst Nacl Invest Agropecuarias & Forestales, Celaya 38110, Gto, MexicoColegio Postgrad, Especialidad Bot, Montecillo 56230, Edo de Mexico, MexicoGolden Bear Land & Water Bolinas, Bolinas, CA 94924, USAUS Forest Serv, Intermt Res Stn, Shrub Sci Lab, Provo, UT 84606, USAAguado-Santacruz, GA, Inst Nacl Invest Agropecuarias & Forestales, Campo Expt Bajio,Apfo Postal 112, Celaya 38110, Gto, Mexico TI - Environmental factors and community dynamics at the southernmost part of the North American Graminetum - II. Temporal plant assemblages determined by rainfall patterns AB - We have delineated the spatio-temporal plant assemblages prevailing under contrasting environmental conditions at the southernmost part of the North American Graminetum in central Mexico and discuss the relative importance of these factors in determining plant community structure and composition. 353 line-transect samples were collected during 11 years from exclosures and adjacent grazed areas within three Bouteloua-dominated grasslands and one Acacia schaffneri shrubland and analyzed using TWINSPAN. In addition, eight edaphic variables were utilized to evaluate similarities in soil properties among sites, using unweighted-pair groups method. Results from TWINSPAN were translated into mosaic patterns to show the distribution of communities as a function of environmental factors over time. Under no or moderate grazing, summer precipitation promotes an initial differentiation of vegetation into high, low or average rainfall communities. This situation is altered in grasslands degraded by intensive grazing pressure, where rainfall patterns play a subordinate role to that of livestock herbivory. Soil influences are secondary to those of precipitation and grazing in affecting grassland structure and composition. In shrubland, community stability is related to high floristic and edaphic spatial heterogeneity in the face of climatic variability MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1385-0237 UR - ISI:000174492100005 L2 - Bouteloua gracilis;classification;community dynamics;community structure;grazing;North American grassland;rainfall;spatial heterogeneity;SPECIES COMPOSITION; GRASSLAND; SHRUB; SOILS SO - Plant Ecology 2002 ;158(1):49-63 5600 UI - 11294 AU - Gueguen P AU - Bard PY AU - Chavez-Garcia FJ AD - LGIT, F-38041 Grenoble 9, FranceLCPC, F-75732 Paris, FranceUNAM, Inst Ingn, Mexico City 14510, DF, MexicoGueguen, P, LGIT, BP53, F-38041 Grenoble 9, France TI - Site-city seismic interaction in Mexico City-like environments: An analytical study AB - Recent destructive earthquakes have confirmed the importance of hazard and vulnerability studies to predict and prevent the impact of large seisms. Most seismic risk analysis considers the buildings as a passive constituent integrated into the vulnerability analysis. This approach neglects the possible contribution of the building vibration to the free field. This article describes an analysis of site-city effects, that is, the seismic interaction of the city with soft soil layers. An analytic method derived from soil-structure interaction studies is described and applied to the Roma Norte zone of Mexico City. The building parameters are derived from detailed studies of the JA and PC buildings. The soil-city system is subjected to the Mexican (M-w 7.3) 14 September 1995 earthquake. The simulated ground surface motions, which incorporate the wave field radiated from the buildings of Roma Norte district, are compared to seismic records from this zone. Analytical procedures reproduce the long time duration and beating of the observed ground motion in Mexico City. Parametric analysis are also performed to identify the predominant factors (e.g., urbanization density, soil-to-city stiffness ratio) that favor the site-city interaction effects. A simple relation is proposed to estimate the expected efficiency of the site-city interaction effects for any city MH - France MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000175320500021 L2 - COMPUTING GREENS-FUNCTIONS; LAYERED HALF-SPACE; GROUND MOTION; EFFICIENT METHOD; CLOSE DEPTHS; RECEIVERS; BUILDINGS SO - Bulletin of the Seismological Society of America 2002 ;92(2):794-811 5601 UI - 10543 AU - Guerra-Rivas G AU - Gomez-Gutierrez CM AU - Marquez-Rocha FJ AD - Univ Autonoma Baja California, Ensenada, Baja California, MexicoCICESE, Dept Biotecnol Marina, Lab Bioprocesos, Ensenada, Baja California, MexicoGuerra-Rivas, G, 416 W San Ysidro Blvd,Suite 609 L, San Ysidro, CA 92173 USA TI - Effect of polycyclic aromatic hydrocarbons on the pallial fluid buffering capacity of the marine mussel, Mytilus galloprovincialis AB - Pallial fluid buffering capacity of the sea mussel Mytilus galloprovincialis was investigated to establish the potential of this biological parameter to serve as a biomarker. Four groups of 15 animals were used in a 72-h toxicity test. Group 1, the aerobic control group, was placed in a filtered aerated natural seawater aquarium. Groups 2-4 were subjected to hypoxic conditions by removal from water after animals were injected with a single dose of the following: group 2 (anaerobic control) was administered 10 mul of UV-treated filtered natural seawater; group 3 (anaerobic solvent control) was injected with 10 mul of acetonitrile and group 4 (PAH exposed group) with 10 mul of 2 mM anthracene. Pallial fluid was taken from all the animals following seawater immersion or air exposure. Pallial fluid from each individual was extracted, adjusted to pH 5.0 and titrated with NaOH until reaching pH 6.0. The buffering capacity index (beta), defined as the amount of muequivalents of NaOH needed to change in one unit the pH of a 5-ml sample of pallial fluid, was calculated for each group. Values were: for group 1, beta = 3.17 (+/- 0.782); for group 2, beta = 15.713 (+/-2.992); group 3 was beta=18.124 (+/-2.288); and group 4 was beta=28.109 (+/-11.398). The statistically significant increase (P<0.05) in group 4 compared with the other groups indicates that the buffering capacity index (β) is a worthy biological parameter to be further explored as a biomarker for ecotoxicological monitoring programs. The increase in buffering capacity is discussed and a biochemical link between anaerobic metabolism and the exposure to PAH is suggested to explain changes of this biological parameter. (C) 2002 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism;Toxicology;Zoology U5 - J;Article AV - English IS - 1532-0456 UR - ISI:000177257300006 L2 - anaerobic metabolism;biomarker;buffering capacity;hypoxic;mussel;PAH;pallial fluid;succinate;MIXED-FUNCTION OXYGENASE; DIGESTIVE-GLAND; COMMON-MUSSEL; EDULIS-L; ENERGY-METABOLISM; SEA MUSSEL; BENZOPYRENE; SYSTEM; BENZO(A)PYRENE; RESPONSES SO - Comparative Biochemistry and Physiology C-Toxicology & Pharmacology 2002 ;132(2):171-179 5602 UI - 10225 AU - Guerrero FD AU - Li AY AU - Hernandez R AD - USDA ARS, Knipling Bushland US Livestock Insects Res La, Kerrville, TX 78028, USACenid Parasitol Vet INFAP SAGARPA, Morelos 62500, MexicoGuerrero, FD, USDA ARS, Knipling Bushland US Livestock Insects Res La, Kerrville, TX 78028 USA TI - Molecular diagnosis of pyrethroid resistance in Mexican strains of Boophilus microplus (Acari : Ixodidae) AB - Polymerase chain reaction (PCR) diagnostic assays were used to identify possible resistance-associated roles of two amino acid substitutions found in pyrethroid resistance-associated genes of Boophilus microplus (Canestrini). Individual larvae from the San Felipe target site resistant strain and the Coatzacoalcos (Cz) metabolic resistant strain were separated into resistant and susceptible groups by larval packet bioassays and analyzed by PCR. A Phe --> Ile amino acid mutation in the sodium channel gene S6 transmembrane segment of domain III was found to have a close association with survival of acaricide treatments containing as high as 30% permethrin. As the permethrin close was increased, an increase was seen in the proportion of surviving larvae that possessed two mutated sodium channel alleles. An Asp --> Asn amino acid Substitution, originally found in high allele frequency in alleles of the CzEst9 esterase of the Cz strain, appeared to provide some resistance to permethrin. However, the presence of the mutation did not associate with resistance in the dose-response fashion seen with the sodium channel amino acid mutation. Resistance provided by CzEst9 might be more dependent on concentration of CzEst9 more so than the presence of a mutated allele MH - Mexico|Morelos MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000178032800011 L2 - Boophilus microplus;polymerase chain reaction;resistance mechanism;diagnostic;sodium channel;mutation;SODIUM-CHANNEL GENE; SOUTHERN CATTLE TICK; POINT MUTATIONS; IDENTIFICATION; KDR; INSECTICIDES SO - Journal of Medical Entomology 2002 ;39(5):770-776 5603 UI - 7128 AU - Guerrero J AU - Pinto R AU - Feuer W AU - Smiddy WE AD - Retina Asoc Para Evitar Ceguera, Mexico City, DF, MexicoIMOL, Belo Horizonte, MG, BrazilBascom Palmer Eye Inst, Miami, FL 33136, USA TI - Avoiding retinal detachment after Vitrectomy for retained lens fragments MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606600621 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U140-U140 5604 UI - 9606 AU - guilar-Cisneros BO AU - Lopez MG AU - Richling E AU - Heckel F AU - Schreier P AD - Univ Wurzburg, Lehrstuhl Lebensmittelchem, D-97074 Wurzburg, GermanyCtr Invest & Estudios, Unidad Biotecnol & Ingn Genet Plantas, Irapuato 36500, MexicoSchreier, P, Univ Wurzburg, Lehrstuhl Lebensmittelchem, Am Hubland, D-97074 Wurzburg, Germany TI - Tequila authenticity assessment by headspace SPME-HRGC-IRMS analysis of C-13/C-12 and O-18/O-16 ratios of ethanol AB - By use of headspace SPIVIE sampling and a PLOT column, on-line capillary gas chromatography-isotope ratio mass spectrometry was employed in the combustion (C) and the pyrolysis (P) modes (HRGC-C/P-IRMS) to determine the delta(13)C(VPDB) and delta(18)O(VSMOW) values of ethanol in authentic (n = 14) and commercial tequila samples (n = 15) as well as a number of other spirits (n = 23). Whereas with delta(13)C(VPDB) values ranging from -12.1 to -13.2parts per thousand and from -12.5 to -14.8parts per thousand similar variations were found for 100% agave and mixed tequilas, respectively, the delta(18)O(VSMOW) data differed slightly within these categories: ranges from +22.1 to +22.8parts per thousand and +20.8 to +21.7parts per thousand were determined for both the authentic 100% agave and mixed products, respectively. The data recorded for commercial tequilas were less homogeneous; delta(13)C(VPDB) data from -10.6 to -13.9parts per thousand and delta(18)O(VSMOW) values from +15.5 to +22.7%. were determined in tequilas of both categories. Owing to overlapping data, attempts to differentiate between white, rested, and aged tequilas within each of the two categories failed. In addition, discrimination of tequila samples from other spirits by means of delta(13)C(VPDB) and delta(18)O(VSMOW) data of ethanol was restricted to the products originating from C-3 as well as C-4/CAM raw materials MH - Germany MH - Mexico|Guanajuato PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000179833700005 L2 - Agave (Agave tequilana Weber var. Azul);tequila;authenticity;spirits;ethanol;isotope ratio analysis;carbon isotope;oxygen isotope;HRGC-C/P-IRMS;GAS-CHROMATOGRAPHY; MASS-SPECTROMETRY; ISOTOPE; FLAVOR; PRODUCTS SO - Journal of Agricultural and Food Chemistry 2002 ;50(26):7520-7523 5605 UI - 12080 AU - guilar-Lemarroy A AU - Gariglio P AU - Whitaker NJ AU - Eichhorst ST AU - zur Hausen H AU - Krammer PH AU - Rosl F AD - Deutsch Krebsforschungszentrum, Forsch Schwerpunkt Angew Tumorvirol, Abt Tumorvirus Immunol, D-69120 Heidelberg, GermanyInst Politecn Nacl, CINVESTAV, Dept Mol Biol & Genet, Mexico City, DF, MexicoUniv New S Wales, Sch Biochem & Mol Genet, Sydney, NSW 2052, AustraliaDeutsch Krebsforschungszentrum, Forsch Schwerpunkt Tumorimmunol, D-69120 Heidelberg, GermanyRosl, F, Deutsch Krebsforschungszentrum, Forsch Schwerpunkt Angew Tumorvirol, Abt Tumorvirus Immunol, Neuenheimer Feld 242, D-69120 Heidelberg, Germany TI - Restoration of p53 expression sensitizes human papillomavirus type 16 immortalized human keratinocytes to CD95-mediated apoptosis AB - To understand the function of the individual oncogenes of HPV16 in modulating the cellular response to apoptogenic signals, we used human keratinocytes immortalized with either E6, E7 or E6/E7 oncoproteins as model system. Applying CD95 antibodies or recombinant CD95 ligand, only the E7-immortalized cells underwent extensive apoptosis. In contrast, E6- and E6/E7-expressing keratinocytes were resistant. Dominance of E6 correlated with significant down-regulation of p53, c-Myc, p21 and Bcl-2. CD95 was found to be reduced in resistant HPV-positive cells, while there were no quantitative differences in expression levels of FADD, FLICE/caspase-8 or caspase-3. Notably, in contrast to primary human keratinocytes, all immortalized cells showed a general reduction of c-FLIP, an inhibitory protein which normally prevents unscheduled CD95-induced apoptosis. E6- and E6/E7-positive keratinocytes, however, can be sensitized to CD95 apoptosis by blocking proteasome-mediated proteolysis. CD95-resistant HPV-positive cells underwent apoptosis within 3-5 h upon co-incubation with MG132 and agonistic antibodies or CD95 ligand, which was preceded by a strong re-expression of p53 and c-Myc, but not of other half-life controlled proteins such as Bax or I kappaB alpha. Blockage of proteasomal activity alone did not result in apoptosis, although the same set of pro-apoptotic proteins was up-regulated. Performing similar experiments with cervical carcinoma cells expressing mutated p53 (C33a) or with P53-'null' lung carcinoma cells (H1299), no CD95 cell killing occurred eventhough c-Myc was strong induced. These data indicate that the reduced bioavailability of p53 is a key-regulatory event in perturbation of CD95 signaling in HPV16 immortalized keratinocytes MH - Australia MH - Germany MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 23 U4 - Biochemistry & Molecular Biology;Oncology;Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0950-9232 UR - ISI:000173026200001 L2 - CD95;cervical cancer;myc;p53;HPV;proteasome inhibitor;PROGRAMMED CELL-DEATH; RETINOBLASTOMA GENE-PRODUCT; FAS-MEDIATED APOPTOSIS; IN-VIVO; EPITHELIAL-CELLS; CANCER-CELLS; PROTEASOME INHIBITORS; MONOCLONAL-ANTIBODY; SIGNALING COMPLEX; MOLECULAR-CLONING SO - Oncogene 2002 ;21(2):165-175 5606 UI - 10050 AU - guilar-Santillan J AU - Cuenca-Alvarez R AU - Balmori-Ramirez H AU - Bradt RC AD - Inst Politecn Nacl, ESIQIE, Dept Met Engn, Mexico City 07300, DF, MexicoUniv Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487, USAAguilar-Santillan, J, Inst Politecn Nacl, ESIQIE, Dept Met Engn, AP 75-872, Mexico City 07300, DF, Mexico TI - Mechanical activation of the decomposition and sintering of kyanite AB - The influence of attrition milling on the thermal decomposition of kyanite ((Al2O3SiO2)-Si-.) to mullite (3Al(2)O(3)(.)2SiO(2)) and SiO2, and its subsequent sintering, was studied. A commercial kyanite was attrition-milled for times up to 12 h. Dilatometry confirmed that as-received unmilled kyanite decomposes between 1300degrees and 1435degreesC. The decomposition reaction is slow initially and accelerates during the later stages until about one-half of the decomposition occurs in the last 35degreesC. For the attrition-milled kyanite, the onset decomposition temperature decreases, the transformation temperature interval is reduced, and both the decomposition reaction and subsequent sintering are accelerated. A dense microstructure of fine equiaxed mullite grains in the 1 mum size range, evenly dispersed in a glassy matrix, is obtained by sintering the attrition-milled kyanites. These results are explained in terms of the energy accumulated during attrition milling, a reduction of the milled kyanite particle size, and the presence of a liquid phase during sintering MH - Mexico|Distrito Federal MH - USA PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000178562400007 L2 - TEMPERATURE TRANSFORMATION; ALPHA-ALUMINA; BEACH SAND; MULLITE; SILLIMANITE; KAOLINITE; EVOLUTION; TIO2 SO - Journal of the American Ceramic Society 2002 ;85(10):2425-2431 5607 UI - 10257 AU - guilar-Setien A AU - Campos YL AU - Cruz ET AU - Kretschmer R AU - Brochier B AU - Pastoret PP AD - Ctr Med Nacl Siglo XXI, Hosp Pediat, Inst Mexicano Seguro Social, Unidad Invest Med Inmunol Coordinac Invest Med, Mexico City 06725, DF, MexicoInst Pasteur Belgium, B-1180 Brussels, BelgiumUniv Liege, Fac Vet Med, Dept Immunol Vaccinol, B-4000 Liege, BelgiumAguilar-Setien, A, Ctr Med Nacl Siglo XXI, Hosp Pediat, Inst Mexicano Seguro Social, Unidad Invest Med Inmunol Coordinac Invest Med, Av Cuauhtemoc 330,Col Doctores, Mexico City 06725, DF, Mexico TI - Vaccination of vampire bats using recombinant vaccinia-rabies virus AB - Adult vampire bats (Desmodus rotundus) were vaccinated by intramuscular, scarification, oral, or aerosol routes (n=8 in each group) using a vaccinia-rabies glycoprotein recombinant virus. Sera were obtained before and 30 days after vaccination. All animals were then challenged intramuscularly with a lethal dose of rabies virus. Neutralizing antirabies antibodies were measured by rapid fluorescent focus inhibition test (RFFIT). Seroconversion was observed with each of the routes employed, but some aerosol and orally vaccinated animals failed to seroconvert. The highest antibody titers were observed in animals vaccinated by intramuscular and scarification routes. All animals vaccinated by intramuscular, scarification, and oral routes survived the viral challenge, but one of eight vampire bats receiving aerosol vaccination succumbed to the challenge. Of 31 surviving vaccinated and challenged animals, nine lacked detectable antirabies antibodies by RFFIT (five orally and four aerosol immunized animals). In contrast, nine of 10 non-vaccinated control bats succumbed to viral challenge. The surviving control bat had antiviral antibodies 90 days after viral challenge. These results suggest that the recombinant vaccine is an adequate and safe immunogen for bats by all routes tested MH - Belgium MH - Mexico|Distrito Federal PB - LAWRENCE: WILDLIFE DISEASE ASSN, INC RP - NOT IN FILE U3 - TC 8 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0090-3558 UR - ISI:000178013100007 L2 - rabies;recombinant vaccinia-rabies;vaccination;vampire bats;GLYCOPROTEIN VIRUS; ORAL VACCINATION; VULPES-VULPES; EPIDEMIOLOGY; INFECTION; WILDLIFE SO - Journal of Wildlife Diseases 2002 ;38(3):539-544 5608 UI - 9422 AU - guilera-Granja F AU - Rodriguez-Lopez JL AU - Michaelian K AU - Berlanga-Ramirez EO AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainAguilera-Granja, F, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Structure and magnetism of small rhodium clusters AB - We report a systematic study of the structural and magnetic properties of free-standing rhodium clusters (Rh-N, 4less than or equal toNless than or equal to26). The geometrical structures of the global minima and lowest energy isomers were obtained with a semiempirical Gupta potential and employing a global evolutive search algorithm. The spin-polarized electronic structure and related magnetic properties of these geometries were calculated by solving self-consistently a spd tight-binding Hamiltonian. We determined the possible coexistence of different isomers and found that inclusion does not, in general, change significantly the magnetic moments obtained for the global minima structures. Results are compared with the experiment and with other theoretical calculations available in the literature MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 32 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000180279000047 L2 - TRANSITION-METAL CLUSTERS; ELECTRONIC-STRUCTURE; NICKEL CLUSTERS; COBALT CLUSTERS; IRON CLUSTERS; AG(001) SURFACE; NI CLUSTERS; 4D CLUSTERS; MOMENTS; BEHAVIOR SO - Physical Review B 2002 ;66(22): 5609 UI - 11641 AU - Guillen L AU - Aluja M AU - Equihua M AU - Sivinski J AD - Inst Ecol, AC, Xalapa 91000, Veracruz, MexicoARS, Ctr Med Agr & Vet Entomol, USDA, Gainesville, FL 32608, USAAluja, M, Inst Ecol, AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Performance of two fruit fly (Diptera : Tephritidae) pupal parasitoids (Coptera haywardi [Hymenoptera : Diapriidae] and Pachycrepoideus vindemiae [Hymenoptera : Pteromalidae]) under different environmental soil conditions AB - We evaluated the performance of Coptera haywardi (Ogloblin) (Diapriidae) and Pachycrepoideus vindemiae (Rondani) (Pteromalidae), both hymenopteran pupal parasitoids of Anastrepha spp. (Diptera: Tephritidae). Performance was studied by manipulating the following environmental conditions in the laboratory: (1) soil type, (2) soil moisture content, (3) soil compaction, and (4) depth at which pupae were buried in the soil. There were two experiments: in the first, exposure time of pupae was held constant and in the second, it varied. In the first experiment, C. haywardi was significantly more effective than P. vindemiae in parasitizing fly pupae. With exposure time held constant (36 h), only soil type and pupal burial depth were significantly related to parasitism rates. While P. vindemiae only parasitized pupae located on the soil surface, C. haywardi attacked pupae that were buried up to 5 cm deep, performing better in clayey than in loamy soil. In the second experiment, exposure time (24, 36, 48, and 72 h) had no significant effect on parasitism rates, but soil type did. P. vindemiae again only attacked pupae on the soil surface while C. haywardi was also able to parasitize pupae that were buried up to 5 cm deep. We conclude that C. haywardi represents a viable candidate to replace the environmentally unfriendly P. vindemiae in augmentative biological control programs against fruit flies. (C) 2002 Elsevier Science (USA) MH - Mexico|Veracruz MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000174354900002 L2 - Coptera haywardi;Pachycrepoideus vindemiae;pupal burial depth;Tephritidae;parasitoids;biological control;soil type;FLIES DIPTERA; HOUSE-FLY; LARVAL-PUPAL; DEPTH; SUPPRESSION; POPULATION; PUPATION; MUSCIDAE; MEXICO SO - Biological Control 2002 ;23(3):219-227 5610 UI - 9852 AU - Guinovart-Diaz R AU - Bravo-Castillero J AU - Rodriguez-Ramos R AU - Martinez-Rosado R AU - Serrania F AU - Navarrete M AD - Univ La Habana, Fac Matemat & Computac, Havana 10400 4, CubaInst Tecnol Estudios Super Monterrey, Monterrey, MexicoNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoRodriguez-Ramos, R, Univ La Habana, Fac Matemat & Computac, Havana 10400 4, Cuba TI - Modeling of elastic transversely isotropic composite using the asymptotic homogenization method. Some comparisons with other models AB - The objective of this paper is to apply the asymptotic homogenization method (AHM) to determine the analytical formulae for the elastic effective coefficients of a two-phase fibrous composite provided with a periodic structure. In the analysis, the periodicity of the structure is assumed to be much smaller than the elastic wavelength. The fibres are aligned unidirectional with respect to the x(3)-axis. The constituents are transversely isotropic materials. The results are used to determine numerically the linear elastic behavior of two types of fibre composites. Some comparisons with different experimental results and theoretical models are shown. (C) 2002 Elsevier Science BY. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000179087900003 L2 - effective properties;fibrous composite;homogenization;transversely isotropic;periodic structure;FIBER-REINFORCED COMPOSITE; CLOSED-FORM EXPRESSIONS; EFFECTIVE COEFFICIENTS; CONSTITUENTS; SYMMETRY SO - Materials Letters 2002 ;56(6):889-894 5611 UI - 10028 AU - Guinto G AU - del Valle R AU - Nishimura E AU - Mercado M AU - Nettel B AU - Salazar F AD - Ctr Med Nacl Siglo XXI, Dept Neurosurg, Mexico City, DF, MexicoCtr Med Nacl Siglo XXI, Dept Endocrinol, Mexico City, DF, MexicoHosp Med Sur, Dept Neurosurg, Mexico City, DF, MexicoUniv Iowa Hosp, Dept Neurosurg, Iowa City, IA, USAGuinto, G, Hosp Angeles Pedregal, Periferico Sur 3697,Consultorio 1025,Colonia Hero, Mexico City 10700, DF, Mexico TI - Primary empty sella syndrome: The role of visual system herniation AB - BACKGROUND It has been traditionally accepted that ophthalmologic alterations in cases of primary empty sella syndrome are caused by the herniation of the visual system in the pituitary fossa, but this cannot be stated categorically. METHODS Two female patients with primary empty sella syndrome and visual field defects were included in this series. The peculiarity of these cases was that in neither of them was there an evident herniation of the visual system. In the absence of other causes that could explain the visual defects, the patients were operated on through a trans-sphenoidal approach. RESULTS Both patients showed immediate improvement of their visual deficits without recurrence. Postoperative imaging studies have shown continuance of an adequate elevation of the sellar contents during the 5-year follow-up period. CONCLUSIONS Visual field defects in cases of primary empty sella syndrome may occur even without radiological evidence of herniation of the visual system. The fact that the two patients described in this paper improved after surgery supports other reports that in this syndrome traction on the infundibular stalk may cause some microscopic anatomic alteration in the visual system or in its vascular supply that is not evident on imaging studies. (C) 2002 by Elsevier Science Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology;Surgery U5 - J;Article AV - English IS - 0090-3019 UR - ISI:000178543800009 L2 - empty sella syndrome;headaches;transsphenoidal surgery;visual deficit;SURGERY SO - Surgical Neurology 2002 ;58(1):42-48 5612 UI - 10497 AU - guirre-Diaz GJ AU - Dubois M AU - Laureyns J AU - Schaaf P AD - Univ Nacl Autonoma Mexico, Inst Geol, Unidad Invest Ciencias Tierra, Queretaro 76230, MexicoUniv Sci & Tech Lille Flandres Artois, FRE 2255, UFR Sci Terre, F-59655 Villeneuve Dascq, FranceUniv Sci & Tech Lille Flandres Artois, Lab Spectrochim Infrarouge & Raman, Ctr Etud & Rech Lasers & Applicat, F-59655 Villeneuve Dascq, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Lab Univ Geoquim & Isotopes, Mexico City 014510, DF, MexicoAguirre-Diaz, GJ, Univ Nacl Autonoma Mexico, Inst Geol, Unidad Invest Ciencias Tierra, Campus Juriquilla, Queretaro 76230, Mexico TI - Nature and P-T conditions of the crust beneath the central Mexican Volcanic Belt based on a Precambrian crustal xenolith AB - A granulite xenolith was encountered in an ignimbrite of Amealco caldera, Mexico. This sample is one of three granulite occurrences in the central Mexican Volcanic Bell. It is a medium-grained, equigranular rock, with plagioclase (60 vol%), quartz (10%), orthopyroxene (8%), clinopyroxene (2%), accessory ilmenite (<1%), apatite and zircon (both <1%), and glass (20%). The glass represents partial fusion, probably due to decompression. Absence of alumina-rich phases or graphite indicates an igneous protolith. Isotope values of Nd-143/Nd-144 = 0.512681 +/- 16 (epsilonNd = +0.84) and Sr-87/Sr-86 0.705874 +/- 39 confirm a volcanic are tectonic setting. The granulite yielded a model age of 683 Ma. Whole-rock chemistry indicates a dacite composition. BEE patterns show a positive Eu anomaly with a general negative slope from La to Lu, and HFSE such as Nb are relatively depleted, as expected for subduction-generated magmas. Fluid inclusion (FI) studies performed mainly on feldspars revealed four FI types. Type I is represented by very rare FI composed of CO2 water. Other types (2. 3. and 4) are essentially composed of CO2. Type 2 comprises large (up to 60 pm) FI, whereas type 3 FI are distributed along planes crosscutting the crystal (quartz and feldspar). Type 4 are complex low-maturity FI surrounding type 3 FI. Densities in type 3 FI are between 0.07 and 0.75 g/cm(3). This scattering is interpreted as being due to decrepitation of FI during the decompression stage of the sample. Using the highest recorded densities, maximum trapping pressure was estimated at 2.9 to 3.2 kbar, assuming a temperature of 800-900degreesC, corresponding to a lower to upper crust pressure (5-10 kin depth) following the decompression stage. A granulitic basement of arc affinity and Precambrian age is inferred at depths of >5 km beneath Amealco caldera. A fragment of this basement was incorporated into an ascending pulse of mafic magma that was injected into the relatively shallow magma chamber of Amealco caldera, and was erupted together with voluminous pyroclastic flows MH - France MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 4 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000177336200002 L2 - PLUME-RELATED MAGMATISM; CALC-ALKALIC VOLCANISM; ISLAND BASALT TYPE; PERIDOTITE XENOLITHS; FLUID INCLUSIONS; ACTIVE MARGIN; TERRANES; ROCKS; EVOLUTION; BASEMENT SO - International Geology Review 2002 ;44(3):222-242 5613 UI - 10787 AU - guirre-Hernandez R AU - Farewell VT AD - UNAM, IIMAS, Dept Probabil & Estadist, Mexico City 04510, DF, MexicoMRC, Biostat Unit, Cambridge CB2 2BW, EnglandAguirre-Hernandez, R, UNAM, IIMAS, Dept Probabil & Estadist, Circuito Escolar,Cd Univ, Mexico City 04510, DF, Mexico TI - A Pearson-type goodness-of-fit test for stationary and time-continuous Markov regression models AB - Markov regression models describe the way in which a categorical response variable changes over time for subjects with different explanatory variables. Frequently it is difficult to measure the response variable on equally spaced discrete time intervals. Here we propose a Pearson-type goodness-of-fit test for stationary Markov regression models fitted to panel data, A parametric bootstrap algorithm is used to study the distribution of the test statistic. The proposed technique is applied to examine the fit of a Markov regression model used to identify markers for disease progression in psoriatic arthritis. Copyright (C) 2002 John Wiley Sons, Ltd MH - United Kingdom MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Mathematical & Computational Biology;Public, Environmental & Occupational Health;Medical Informatics;Medicine, Research & Experimental;Statistics & Probability U5 - J;Article AV - English IS - 0277-6715 UR - ISI:000176642000006 L2 - panel data;stationary transition probabilities;Markov regression;goodness of fit;parametric bootstrap SO - Statistics in Medicine 2002 ;21(13):1899-1911 5614 UI - 11673 AU - Guo JY AU - Martinez-Villa R AD - Hunan Normal Univ, Dept Math, Changsha, Peoples R ChinaUNAM, Inst Matemat, Mexico City 04510, DF, MexicoGuo, JY, Hunan Normal Univ, Dept Math, Changsha, Peoples R China TI - Algebra pairs associated to Mckay quivers AB - It is known that preprojective algebras are related to the McKay quiver of the finite subgroups of SL(2, C). In this note we relate two algebras to the McKay quiver of a finite subgroup of GL(m, C) for any in. Some properties of the McKay quiver are also studied with these algebras MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000174141200030 L2 - SINGULARITIES SO - Communications in Algebra 2002 ;30(2):1017-1032 5615 UI - 9936 AU - Guo XP AU - Yu W AU - Li XO AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoZhongshan Univ, Dept Stat Sci, Guangzhou, Peoples R ChinaIPN, CINVESTAV, Dept Ingn Elect, Secc Computac, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Matemat, Mexico City 07360, DF, MexicoYu, W, IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, Mexico TI - Minimax control for discrete-time time-varying stochastic systems AB - This paper gives a self-contained presentation of minimax control for discrete-time time-varying stochastic systems under finite- and infinite-horizon expected total cost performance criteria. Suitable conditions for the existence of minimax strategies are proposed. Also, we prove that the values of the finite-horizon problem converge to the values of the infinite-horizon problems. Moreover, for finite-horizon problems an algorithm of calculation of minimax strategies is developed and tested by using time-varying stochastic systems. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000179083100017 L2 - minimax techniques;time-varying system;stochastic system;MARKOV DECISION-PROCESSES; MODEL-PREDICTIVE CONTROL; DYNAMIC NEURAL NETWORKS; LINEAR-SYSTEMS; STATE-SPACE; CRITERION SO - Automatica 2002 ;38(11):1991-1998 5616 UI - 10324 AU - Gupta PK AU - Balyan HS AU - Edwards KJ AU - Isaac P AU - Korzun V AU - Roder M AU - Gautier MF AU - Joudrier P AU - Schlatter AR AU - Dubcovsky J AU - De la Pena RC AU - Khairallah M AU - Penner G AU - Hayden MJ AU - Sharp P AU - Keller B AU - Wang RCC AU - Hardouin JP AU - Jack P AU - Leroy P AD - CCS Univ, Meerut, Uttar Pradesh, IndiaUniv Bristol, Dept Biol Sci, Bristol BS8 1TH, Avon, EnglandAgrogene, Moissy Cramayel, FranceLochow Petkus GmbH, D-37574 Einbeck, GermanyIPK, Inst Plant Genet & Crop Plant Res, D-06466 Gatersleben, GermanyINRA, F-34060 Montpellier, FranceINTA, IRB, RA-1712 Buenos Aires, DF, ArgentinaUniv Calif Davis, Davis, CA 95616, USAMonsanto Co, St Louis, MO 63137, USACIMMYT, Mexico City, DF, MexicoUniv Sydney, Qual Wheat CRC, Camden, NSW 2570, AustraliaUniv Sydney, Plant Breeding Inst, Camden, NSW 2570, AustraliaUniv Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandUSDA ARS, FRRL, Logan, UT 84322, USAUBP, UMR INRA, APS, F-63039 Clermont Ferrand 2, FranceGupta, PK, CCS Univ, Meerut, Uttar Pradesh, India TI - Genetic mapping of 66 new microsatellite (SSR) loci in bread wheat AB - In hexaploid bread wheat (Triticum aestivum L. em. Thell), ten members of the IWMMN (International Wheat Microsatellites Mapping Network) collaborated in extending the microsatellite (SSR = simple sequence repeat) genetic map. Among a much larger number of microsatellite primer pairs developed as a part of the WMC (Wheat Microsatellite Consortium), 58 out of 176 primer pairs tested were found to be polymorphic between the parents of the ITMI (International Triticeae Mapping Initiative) mapping population W7984 x Opata 85 (ITMIpop). This population was used earlier for the construction of RFLP (Restriction Fragment Length Polymorphism) maps in bread wheat (ITMImap). Using the ITMIpop and a framework map (having 266 anchor markers) prepared for this purpose, a total of 66 microsatellite loci were mapped, which were distributed on 20 of the 21 chromosomes (no marker on chromosome 6D). These 66 mapped microsatellite (SSR) loci add to the existing 384 microsatellite loci earlier mapped in bread wheat MH - Argentina MH - Australia MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 78 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000177739800031 L2 - Triticum aestivum;bread wheat;molecular genetic maps;microsatellites;SSRs;TRITICUM-AESTIVUM L; PHYSICAL MAPS; COMMON WHEAT; HOMOEOLOGOUS GROUP-4; CHROMOSOMES; MARKERS SO - Theoretical and Applied Genetics 2002 ;105(2-3):413-422 5617 UI - 10083 AU - Gurevich YG AU - Logvinov GN AU - Titov OY AU - Giraldo J AD - IPN, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoInst Politecn Nacl, SEPI ESIME Culhuacan, San Francisco, CA, USAIPN, CICATA, Queretaro 76040, Qro, MexicoUniv Nacl Colombia, Grp Fis Mat Condensada, AA-60739 Bogota, ColombiaGurevich, YG, IPN, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - New physical principles of contact thermoelectric cooling AB - We suggest a new approach to theory of contact thermoelectric cooling (Peltier effect). The metal-metal, metal-n-type semiconductor, metal-p-type semiconductor, p-n junction contacts are analyzed. Both degenerate and nondegenerate electron and hole gases are considered. The role of recombination in the contact cooling effect is discussed for the first time MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400019 L2 - thermoelectric cooling;Peltier effect;contact phenomena;generation and recombination;SEMICONDUCTORS SO - Surface Review and Letters 2002 ;9(5-6):1703-1708 5618 UI - 10928 AU - Gurevich YG AU - Logvinov GN AU - Volovichev IN AU - Espejo G AU - Titov OY AU - Meriuts A AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoIPN, CICATA, Morelia 58000, Michoacan, MexicoIPN, CICATA, Santiago Queretaro 76040, Qro, MexicoKharkov Politech Univ, UA-310002 Kharkov, UkraineUkrainian Acad Sci, Inst Radiophys & Elect, UA-310085 Kharkov, UkraineGurevich, YG, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - The role of non-equilibrium carriers in the formation of thermo-EMF in bipolar semiconductors AB - A new approach is presented to thermoelectric phenomena, as a linear transport process of non-equilibrium charge carriers. The role of non-equilibrium carriers, as well as surface and bulk recombination, has shown to be crucial even within the linear approximation. Electron and hole Fermi quasi-levels that appeared in a thermal field are calculated for the case of thermoelectric current flow through a circuit and the corresponding boundary conditions are obtained. It is shown for the first time that the Fermi quasi-level of one of the subsystems of quasi-particles can be a non-monotonous function of the coordinates. General expressions for the thermoelectric current, thermo-e.m.f., and electrical resistance of bipolar semiconductors have been obtained. For the first time, surface recombination and surface resistance were taken into account in thermoelectric phenomena MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Queretaro MH - Ukraine PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000176126500033 L2 - PHONON DRAG SO - Physica Status Solidi B-Basic Research 2002 ;231(1):278-293 5619 UI - 11416 AU - Gurevich YG AU - Logvinov GN AU - Aguirre NM AU - Perez LM AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoOak Ridge Natl Lab, Oak Ridge, TN 37830, USAInst Politecn Nacl, Unidad Profes Interdisciplinaria Ingn & Tecnol Av, Mexico City 07340, DF, MexicoGurevich, YG, Inst Politecn Nacl, ESIME Culhuacan, Secc Estudios Posgrado Invest, Av Santa Anna 1000,Col San Francisco, Culhuacan 04430, DF, Mexico TI - "Resonance" phenomena in thermal diffusion processes in two-layer structures AB - The dependence on the chopper frequency of the effective thermal diffusivity and effective thermal conductivity in photoacoustic experiments is discussed. The theoretical model of a two-layer structure at rear-surface illumination in the high frequency limit is considered. It is shown that the effective thermal diffusivity presents "resonance" while the effective thermal conductivity sharply changes its magnitude and sign. Such "resonant" behavior strongly depends on the surface thermal conductivities associated with the interface thermal contacts. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000175068900027 SO - Applied Physics Letters 2002 ;80(16):2898-2900 5620 UI - 12123 AU - Gurevich YG AU - Logvinov GN AU - Carballo-Sanchez AF AU - Drogobitskiy YV AU - Salazar JL AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoTernopol Pedag State Univ, UA-46027 Ternopol, UkraineGurevich, YG, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Electron and phonon temperature relaxation in semiconductors excited by thermal pulse AB - Electron and phonon transient temperatures are analyzed in the case of nondegenerate semiconductors. An analytical solution is obtained for rectangular laser pulse absorption. It is shown that thermal diffusion is the main energy relaxation mechanism in the phonon subsystem. The mechanism depends on the correlation between the sample length l and the electron cooling length l(epsilon) in an electron subsystem. Energy relaxation occurs by means of the electron thermal diffusion in thin samples (l<>l(epsilon)). Characteristic relaxation times are obtained for all the cases, and analysis of these times is made. Electron and phonon temperature distributions in short and long samples are qualitatively and quantitatively analyzed for different correlations between the laser pulse duration and characteristic times. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000172835600030 L2 - TRANSPORT SO - Journal of Applied Physics 2002 ;91(1):183-191 5621 UI - 12023 AU - Gurin VS AU - Petranovskii VP AU - Bogdanchikova NE AD - Belarussian State Univ, Phys Chem Res Inst, Minsk 220080, ByelarusUNAM, CCMC, Ensenada 22800, Baja California, MexicoGurin, VS, Belarussian State Univ, Phys Chem Res Inst, Leningradskaja Str 14, Minsk 220080, Byelarus TI - Metal clusters and nanoparticles assembled in zeolites: an example of stable materials with controllable particle size AB - An ion-exchangeable zeolite (mordenite) is used to control the formation of nanoparticles and clusters within the solid matrix by the hydrogen reduction of metal ions (Ag+, Cu2+, and Ni2+). SiO2/Al2O3 molar ratio in mordenite appears to be an efficient tool to manage the reducibility of the metal ions. Few-atomic silver clusters in line with the larger silver nanoparticles were observed with DRS for the reduced Ag+-exchanged mordenites. Cu2+-exchanged ones produce the copper nanoparticles with different optical appearance, and Ni2+-exchanged mordenites are reduced up to complicated species with no explicit assignment of metal particles under the conditions studied. (C) 2002 Elsevier Science B.V. All rights reserved MH - Byelarus MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000173080700067 L2 - zeolite;clusters;metal nanoparticles;SILVER NANOPARTICLES; ION-IMPLANTATION; FUSED-SILICA; GLASSES SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2002 ;19(1-2):327-331 5622 UI - 10558 AU - Gutierrez-Puente Y AU - Zapata-Benavides P AU - Tari AM AU - Lopez-Berestein G AD - Univ Texas, MD Anderson Canc Ctr, Dept Bioimmunotherapy, Houston, TX 77030, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, Monterrey, NL, MexicoLopez-Berestein, G, Univ Texas, MD Anderson Canc Ctr, Dept Bioimmunotherapy, 1515 Holcombe Blvd,Box 422, Houston, TX 77030 USA TI - Bcl-2-related antisense therapy MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 19 U4 - Oncology U5 - J;Review AV - English IS - 0093-7754 UR - ISI:000177095800010 L2 - BCL-2 PROTEIN EXPRESSION; BREAST-CANCER PATIENTS; PROSTATE-CANCER; CELL-LINE; PROTOONCOGENE EXPRESSION; INHIBITS APOPTOSIS; HUMAN MELANOCYTES; DOWN-REGULATION; RECEPTOR STATUS; P53 PROTEIN SO - Seminars in Oncology 2002 ;29(3):71-76 5623 UI - 11564 AU - Gutierrez-Wing C AU - Ascencio JA AU - de la Cruz W AU - Cota L AU - Jose-Yacaman M AD - ININ, Ocoyocac 52045, Estado Mexico, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUNAM, Ctr Ciencias Mat Condensada, Mexico City 04510, DF, MexicoUniv Texas, Dept Chem Engn, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Ctr Nano & Mol Technol, Austin, TX 78712, USAUNAM, Inst Fis, Mexico City 01000, DF, MexicoJose-Yacaman, M, ININ, Km 36-5 Carr Mexico Toluca, Ocoyocac 52045, Estado Mexico, Mexico TI - Observation of sulfur on the surface of giant aurothiol nanoclusters AB - We report the study of aurothiol nanoclusters using high-resolution electron microscopy, energy loss spectroscopy, X-ray photoelectron spectroscopy, Auger spectroscopy, and microscopy. It is concluded that the sulfur atoms are located on the surface of the gold nanoparticles in both (100) and (111) microfacets. The X-ray photoelectron spectroscopy data show that there is a Au-Au bond as well as a Au-S bond. Auger depth profile measurements made by sputtering of the nanoparticles corroborates that the sulfur is located on the surface of the nanoparticle. Quantitative Auger analysis indicates a ratio Au/S between approximate to1.79 and 1.98 MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - STEVENSON RANCH: AMER SCIENTIFIC PUBLISHERS RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1533-4880 UR - ISI:000174564900016 L2 - aurothiol nanoclusters;sulfur;Auger analysis;HREM;EELS;XPS;microscopy;GOLD NANOPARTICLES; MONOLAYERS; MOLECULES; AU(111); THIOLS; LIQUID SO - Journal of Nanoscience and Nanotechnology 2002 ;2(1):101-105 5624 UI - 11074 AU - Gutierrez G AU - Sixtos S AU - Gutierrez MC AU - Sanchez F AU - Torres L AU - Ramirez T AU - Vargas F AU - Diehl AM AU - Kershenobich D AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoJohns Hopkins Univ, Baltimore, MD 21218, USA TI - Proinflammatory cytokines in liver biopsy of patients with alcoholic liver disease MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0168-8278 UR - ISI:000175704700916 SO - Journal of Hepatology 2002 ;36():255-255 5625 UI - 10140 AU - Guzman-Novoa E AU - Hunt GJ AU - Page RE AU - Fondrk MK AD - INIFAP, CENIFMA, Metepec 52140, Edo De Mexico, MexicoPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USAUniv Calif Davis, Dept Entomol, Davis, CA 95616, USAGuzman-Novoa, E, INIFAP, CENIFMA, Santa Cruz 29-B, Metepec 52140, Edo De Mexico, Mexico TI - Genetic correlations among honey bee (Hymenoptera : Apidae) behavioral characteristics and wing length AB - Genetic correlations for behavioral characteristics and forewing length of worker honey bees, Apis mellifera L., were estimated. All characteristics associated with defensive behavior were correlated with each other. The tendency of bees to fly off the combs was correlated with their tendency to run on the combs, and with stinging behavior. Tendency to run was positively correlated with tendency to hang from combs, and with hygienic behavior, but was negatively correlated with forewing length. Forewing length was negatively correlated with hygienic behavior, but it was not significantly correlated with stinging behavior. The correlations obtained suggest that smaller bees have higher activity levels than larger bees. The implications of these results on the adaptive success of Africanized honey bee populations to tropical environments and on selective breeding are discussed MH - Mexico|Estado De Mexico MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000178373200020 L2 - Africanized honey bee;genetic correlations;size;defensive behavior;APIS-MELLIFERA L; VARROA-JACOBSONI OUDEMANS; QUANTITATIVE TRAIT LOCI; DEFENSIVE BEHAVIOR; COLONY DEFENSE; HYGIENIC BEHAVIOR; IDENTIFICATION; HYBRIDS; AFRICAN; BROOD SO - Annals of the Entomological Society of America 2002 ;95(3):402-406 5626 UI - 11225 AU - Guzman-Novoa E AU - Hunt GJ AU - Uribe JL AU - Smith C AU - rechavaleta-Velasco ME AD - INIFAP, CENIFMA, Metepec 52140, MexicoPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USAGuzman-Novoa, E, INIFAP, CENIFMA, Santa Cruz 29-B, Metepec 52140, Mexico TI - Confirmation of QTL effects and evidence of genetic dominance of honeybee defensive behavior: Results of colony and individual behavioral assays AB - The stinging and guarding components of the defensive behavior of European, Africanized, hybrid, and backcross honeybees (Apis mellifera L.) were compared and analyzed at both colony and individual levels. Hybrid and Africanized backcross colonies stung as many times as Africanized ones. European backcross colonies stung more than European bees but not as many times as Africanized or Africanized backcross colonies. The degree of dominance for the number of times that worker bees stung a leather patch was estimated to be 84.3%, 200.8%, and 145.8% for hybrid, backcross European, and backcross Africanized colonies, respectively. Additionally, both guards at the colony entrance and fast-stinging workers of one European backcross colony had a significantly higher frequency of an Africanized DNA marker allele, located near "sting1," a QTL previously implicated in stinging behavior at the colony level. However, guards and fast-stinging bees from a backcross to the Africanized parental colony did not differ from control bees in their frequency for the Africanized and European markers, as would be expected if large genetic dominance effects for sting1 exist. These results support the hypothesis that genetic dominance influences the defensive behavior of honeybees and confirm the effect of sting1 on the defensiveness of individual worker bees MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 18 U4 - Behavioral Sciences;Genetics & Heredity;Psychology, Multidisciplinary U5 - J;Article AV - English IS - 0001-8244 UR - ISI:000175458100002 L2 - Apis mellifera;defensive behavior;Africanized honeybees;genetic dominance;QTL;DIVISION-OF-LABOR; APIS-MELLIFERA L; QUANTITATIVE TRAIT LOCI; BEE FORAGING BEHAVIOR; EUROPEAN HONEYBEES; MITOCHONDRIAL-DNA; GENOTYPIC VARIABILITY; TASK SPECIALIZATION; AFRICAN HONEYBEES; SOCIAL INSECTS SO - Behavior Genetics 2002 ;32(2):95-102 5627 UI - 9547 AU - Guzman-Uriostegui A AU - Garcia-Jimenez P AU - Marian F AU - Robledo D AU - Robaina R AD - IPN, Ctr Invest & Estudios Avanzados, Cordemex Merida, Yucatan, MexicoUniv Las Palmas Gran Canaria, Dept Biol, Las Palmas Gran Canaria 35017, SpainRobledo, D, IPN, Ctr Invest & Estudios Avanzados, Unidad Merida,AP 73, Cordemex Merida, Yucatan, Mexico TI - Polyamines influence maturation in reproductive structures of Gracilaria cornea (Gracilariales, Rhodophyta) AB - Naturally occurring levels of putrescine, spermidine, and spermine were analyzed in female gametophyte (nonfertilized) and reproductive tissues (cystocarps) at two different stages of development in the marine red algae Gracilaria cornea J. Agardh. Endogenous polyamine levels changed at differential stages of cystocarp maturation. Highest polyamine values were found on tissue from the early post-fertilization stage, decreasing as the cystocarp matured. Incubation experiments revealed that exogenous polyamines induced cystocarp maturation and promoted carpospore liberation, developing cell masses within 4 to 7 days in treatments with spermine. This is the first report on the effect of polyamines on cystocarp maturation in marine algae MH - Mexico|Yucatan MH - Spain PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-3646 UR - ISI:000179910900013 L2 - carpospores;cell mass;cystocarp maturation;Gracilaria cornea;polyamines;putrescine;spermidine;spermine;PLANT DEVELOPMENT; CONJUGATED POLYAMINES; IN-VITRO; GROWTH; STRESS; BIOSYNTHESIS; METABOLISM; PHYSIOLOGY; MACROALGAE; PUTRESCINE SO - Journal of Phycology 2002 ;38(6):1169-1175 5628 UI - 11654 AU - Guzman J AU - Saucedo I AU - Navarro R AU - Revilla J AU - Guibal E AD - Ecole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, FranceUniv Guanajuato, Inst Invest Cientif, Guanajuato 36040, Gto, MexicoCtr Invest & Desarrollo, Mexico City 52000, DF, MexicoGuibal, E, Ecole Mines Ales, Lab Genie Environm Ind, 6 Ave Clavieres, F-30319 Ales, France TI - Vanadium interactions with chitosan: Influence of polymer protonation and metal speciation AB - Chitosan is very efficient at removing vanadium from dilute solutions: sorption capacity can reach 400-450 mg V g(-1) under optimum experimental conditions, which correspond to pH 3. In acidic solutions, the chitosan's amine groups are protonated, and vanadate anions can be exchanged with counterions bound to -NH3+ sites. A correlation is observed between the speciation diagram and the sorption isotherms, and it appears that decavanadate species are more favorable to sorption than other anionic vanadate species. Selecting experimental conditions under which decavanadate ions are the predominant form of vanadium results in enhanced sorption capacities and improved sorption kinetics. The results obtained in the study of vanadate desorption confirm the high affinity of chitosan for these polyoxoanions MH - France MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 35 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000174130500019 L2 - PHYSICOCHEMICAL PARAMETERS; URANYL IONS; SORPTION; EQUILIBRIUM; ADSORPTION; KINETICS; BEADS; CU SO - Langmuir 2002 ;18(5):1567-1573 5629 UI - 11108 AU - Hadyn N AU - Luevano J AU - Mantica G AU - Vaienti S AD - Univ So Calif, Dept Math, Los Angeles, CA 90089, USAUniv Aix Marseille 2, Ctr Phys Theor, F-13284 Marseille 07, FranceUniv Autonoma Metropolitana Azcapotzalco, Azcapotzalco, MexicoUniv Insubria, Ctr Nonlinear & Complex Syst, Como, ItalyIst Nazl Fis Nucl, Sez Milano, INFM, Unita Como, I-20133 Milan, ItalyCtr Phys Theor, Marseille, FranceUniv Toulon & Var, PHYMAT, Toulon, FranceHadyn, N, Univ So Calif, Dept Math, Los Angeles, CA 90089, USA TI - Multifractal properties of return time statistics AB - The global statistics of the return times of a dynamical system can be described by a new spectrum of generalized dimensions. Comparison with the usual multifractal analysis of measures is presented, and the difference between the two corresponding sets of dimensions is established. Theoretical analysis and numerical examples of dynamical systems in the class of iterated functions are presented MH - France MH - Italy MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000175709100014 L2 - SYSTEMS; ENTROPY; CHAOS SO - Physical Review Letters 2002 ;88(22): 5630 UI - 10820 AU - Halfar J AU - Nava-Sanchez EH AD - Univ Stuttgart, Inst Geol & Palaeontol, D-70174 Stuttgart, GermanyCICIMAR, Dept Oceanol, La Paz 23000, BCS, MexicoHalfar, J, Univ Stuttgart, Inst Geol & Palaeontol, Herdweg 51, D-70174 Stuttgart, Germany TI - Sedimentation and tectonics along a rift basin margin: The Gulf of California (vol 144, pg 1, 2001) MH - Germany MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geology U5 - J;Correction AV - English IS - 0037-0738 UR - ISI:000176469800007 SO - Sedimentary Geology 2002 ;149(4):281-281 5631 UI - 9865 AU - Hamann S AU - Kiilgaard JF AU - Litman T AU - varez-Leefmans FJ AU - Winther BR AU - Zeuthen T AD - Univ Copenhagen, Panum Inst, Dept Med Physiol, DK-2200 Copenhagen N, DenmarkUniv Copenhagen, Eye Pathol Inst, DK-2100 Copenhagen, DenmarkInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Farmacobiol, Mexico City 07000, DF, MexicoInst Nacl Paiquiatria, Dept Neurobiol, Mexico City, DF, MexicoGlostrup Cty Hosp, Dept Clin Biochem, DK-2600 Glostrup, DenmarkHamann, S, Univ Copenhagen, Panum Inst, Dept Med Physiol, Blegdamsvej 3, DK-2200 Copenhagen N, Denmark TI - Measurement of cell volume changes by fluorescence self-quenching AB - At high concentrations, certain fluorophores undergo self-quenching, i.e., fluorescence intensity decreases with increasing fluorophore concentration. Accordingly, the self-quenching properties can be used for measuring water volume changes in lipid vesicles. In cells, quantitative determination of water transport using fluorescence self-quenching has been complicated by the requirement of relatively high (mM) and often toxic loading concentrations. Here we report a simple method that uses low (muM) loading concentrations of calcein-acetoxymethyl ester (calcein-AM) to obtain intracellular concentrations of the fluorophore calcein suitable for measurement of changes in cell water volume by self-quenching. The relationship between calcein fluorescence intensity, when excited at 490 nm (its excitation maximum), and calcein concentration was investigated in vitro and in various cultured cell types. The relationship was bell-shaped, with the negative slope in the concentration range where the fluorophore undergoes fluorescence self-quenching. In cultured retinal pigment epithelial cells, calcein fluorescence and extracellular osmolarity were linearly related. A 25-mOsm hypertonic challenge corresponded to a decrease in calcein fluorescence with high signal-to-noise ratio (>15). Similar results were obtained with the fluorophore BCECF when excited at its isosbestic wavelength (436 nm). The present results demonstrate the usefulness of fluorescence self-quenching to measure rapid changes in cell water volume MH - Denmark MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 25 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1053-0509 UR - ISI:000179175500005 L2 - water transport;cell volume;calcein;self-quenching;epithelial cells;WATER PERMEABILITY; HYPERTONIC STRESS; RAT HEPATOCYTES; MEMBRANE WATER; PROTON PUMPS; FLUOROPHORE; LIPOSOMES; VESICLES; CHANNELS SO - Journal of Fluorescence 2002 ;12(2):139-145 5632 UI - 7438 AU - Han TS AU - Sattar N AU - Williams K AU - Gonzalez-Villalpando C AU - Lean MEJ AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, Dept Med 7873, San Antonio, TX 78229, USAUniv Cambridge, Addenbrookes Hosp, Sch Med, Cambridge CB2 2QQ, EnglandGlasgow Royal Infirm, Dept Pathol Biochem, Glasgow G4 0SF, Lanark, ScotlandCtr Estudios Diabet, Mexico City, DF, MexicoGlasgow Royal Infirm, Dept Human Nutr, Glasgow G4 0SF, Lanark, ScotlandHaffner, SM, Univ Texas, Hlth Sci Ctr, Dept Med 7873, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Prospective study of C-reactive protein in relation to the development of diabetes and metabolic syndrome in the Mexico City Diabetes Study AB - OBJECTIVE - Recent evidence suggests that C-reactive protein (CRP) may predict development of diabetes in Caucasian populations. We evaluated CRP as a possible risk factor of the development of diabetes and metabolic syndrome in a 6-year study of 515 men and 729 women from the Mexico City Diabetes Study. RESEARCH DESIGN AND METHODS - Baseline CRP, indexes of adiposity, and insulin resistance (homeostasis model assessment [HOMA-IR]) were used to predict development of the metabolic syndrome defined as including two or more of the following: 1) dyslipidemia (triglyceride greater than or equal to2.26 mmol/l or HDL cholesterol less than or equal to0.91 mmol/l in men and less than or equal to1.17 mmol/l in women; <35 and 40 mg/dl for men and women); 2) hypertension (blood pressure > 140/90 mmHg or on hypertensive medication); or 3) diabetes (1999 World Health Organization criteria). RESULTS - At baseline, CRP correlated significantly (P < 0.001) with all metabolic indexes in women, but less so in men. After 6 years, 14.2% of men and 16.0% of women developed the metabolic syndrome. Compared with tertile 1, women with CRP in the highest tertile had an increased relative risk of developing the metabolic syndrome by 4.0 (95% CI 2.0-7.9) and diabetes by 5.5 (2.2-13.5); these risks changed minimally after adjusting for BMI or HOMA-IR. The area under receiver-operating characteristic (ROC) curve for the prediction of the development of the syndrome was 0.684 for CRP, increasing to 0.706 when combined with BMI and to 0.710 for a complex model of CRP, BMI, and HOMA-IR. CONCLUSIONS - CRP was not a significant predictor of the development of the metabolic syndrome in men. Our data strongly support the notion that inflammation is important in the pathogenesis of diabetes and metabolic disorders in women MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 142 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000185504600019 L2 - INSULIN-RESISTANCE SYNDROME; CARDIOVASCULAR-DISEASE; GLUCOSE-TOLERANCE; ADIPOSE-TISSUE; HEART-DISEASE; LIFE-STYLE; HIGH-RISK; INFLAMMATION; MELLITUS; CYTOKINES SO - Diabetes Care 2002 ;25(11):2016-2021 5633 UI - 9286 AU - Hanisco TF AU - Smith JB AU - Stimpfle RM AU - Wilmouth DM AU - Perkins KK AU - Spackman JR AU - Anderson JG AU - Baumgardner D AU - Gandrud B AU - Webster CR AU - Dhaniyala S AU - McKinney KA AU - Bui TP AD - Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80305, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USACALTECH, Dept Geol & Planetary Sci, Pasadena, CA 91107, USANASA, Ames Res Ctr, Mt View, CA, USAHanisco, TF, Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA TI - Quantifying the rate of heterogeneous processing in the Arctic polar vortex with in situ observations of OH AB - We present simultaneous in situ observations of OH, HO2, ClONO2, HCl, and particle surface area inside a polar stratospheric cloud undergoing rapid heterogeneous processing. A steady-state analysis constrained by in situ observations is used to show that concentrations of OH calculated during a processing event are extremely sensitive to the assumptions regarding aerosol composition and reactivity. This analysis shows that large perturbations in the abundance of OH are consistent with the heterogeneous production of HOCl via ClONO2 + H2O --> HOCl + HNO3 and removal via HOCl + HCl --> Cl-2 + H2O in a polar stratospheric cloud. If the cloud is composed of supercooled ternary solution (STS) aerosols and solid nitric acid trihydrate (NAT) particles, comparison with observations of OH show that modifications to surface reactivity to account for high HNO3 content in STS aerosols and low HCl coverage on NAT particles are appropriate. These results indicate that with the low HCl levels in this encounter and in a processed polar vortex in general, reactions on STS aerosols dominate the total heterogeneous processing rate. As a consequence, the formation of NAT does not lead to significantly faster reprocessing rates when HCl concentrations are low and STS aerosols are present. Model calculations that include these modifications to uptake coefficients for STS and NAT will lead to significantly slower reprocessing and faster recovery rates of chlorine in the springtime Arctic polar vortex MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180466200049 L2 - NITRIC-ACID TRIHYDRATE; SOLID STRATOSPHERIC PARTICLES; REACTIVE UPTAKE COEFFICIENTS; SULFURIC-ACID; CLONO2; HCL; OZONE; ICE; UNCERTAINTIES; DEPENDENCE SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D20): 5634 UI - 11097 AU - Harmanec P AU - Bozic H AU - Percy JR AU - Yang S AU - Ruzdjak D AU - Sudar D AU - Wolf M AU - Iliev L AU - Huang L AU - Buil C AU - Eenens P AD - Charles Univ, Inst Astron, CR-18000 Prague 8, Czech RepublicAcad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech RepublicHvar Observ, Fac Geodesy, Zagreb 10000, CroatiaUniv Toronto, Erindale Coll, Mississauga, ON L5L 1C6, CanadaUniv Toronto, Dept Astron, Mississauga, ON L5L 1C6, CanadaUniv Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, CanadaNatl Astron Observ, Rozhen, BulgariaChinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R ChinaAUDE, F-31130 Quint Fonsegrives, FranceUniv Guanajuato, Dept Astron, Guanajuato 36000, GTO, MexicoHarmanec, P, Charles Univ, Inst Astron, V Holesovickach 2, CR-18000 Prague 8, Czech Republic TI - Properties and nature of Be stars - XXI. The long-term and the orbital variations of V832 Cyg=59 Cyg AB - An analysis of numerous homogenized UBV photoelectric observations and red spectra of the Be star V832 Cyg from several observatories led to the following principal findings: 1. Pronounced long-term light and colour variations of V832 Cyg result from a combination of two effects: from the gradual formation of a new Be envelope, and from an asymmetry and a slow revolution of the envelope (or its one-armed oscillation). The colour variations associated with the envelope formation are characterized by a positive correlation between brightness and emission strength, typical for stars which are not seen roughly equator-on. 2. The V magnitude observations prewhitened for the long-term changes follow a sinusoidal orbital light curve with a small amplitude and a period of 28(d).1971 which is derived from observations spanning 43 years. This independently confirms a 12-year old suggestion that the star is a spectroscopic binary with a 29-d period. V832 Cyg thus becomes the fifth known Be star with cyclic long-term V/R variations, the duplicity of which has been proven, the four other cases being zeta Tau, V923 Aql, gamma Cas and X Per. Therefore, the hypothesis that the long-term V/R variations may arise due to the attractive force of the binary companion at certain phases of the envelope formation is still worth considering as a viable alternative to the model of one-armed oscillation. 3. We have shown that the RV and V/R variations of the Halpha and He I 6678 emission lines are all roughly in phase. In particular, the He I 6678 emission also moves with the Be primary which differs from what was found for another Be binary, phi Per. 4. We derived the orbital elements and found that in spite of the remaining uncertainties, the basic physical properties of the 28(d).2 binary are well constrained. 5. The light minimum of the orbital light curve occurs at elongation when the Be star is approaching us and the object becomes bluest in (B-V) and reddest in (U-B) at the same time. This may indicate that a part of the optically thick regions of the envelope is eclipsed at these orbital phases MH - Bulgaria MH - Canada MH - Croatia MH - Czech Republic MH - France MH - Mexico|Guanajuato MH - Peoples R China PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000175858200023 L2 - stars : emission-line, Be;stars : binaries : close;stars : binaries : spectroscopic;stars : fundamental parameters;stars : individual : V832 Cyg;SMOOTHING OBSERVATIONAL DATA; PHYSICAL-PROPERTIES; STELLAR MASSES; PHI-PERSEI; FAR UV; BRIGHT; SPECTROSCOPY; VARIABILITY; RESOLUTION; PHOTOMETRY SO - Astronomy & Astrophysics 2002 ;387(2):580-594 5635 UI - 11480 AU - Harper C AU - Ellertson C AU - Winikoff B AD - Univ Calif San Francisco, Ctr Reprod Hlth Res & Policy, San Francisco, CA 94143, USAPopulat Council, Mexico City, DF, MexicoPopulat Council, New York, NY 10021, USAHarper, C, Univ Calif San Francisco, Ctr Reprod Hlth Res & Policy, San Francisco, CA 94143 USA TI - Could American women use mifepristone-misoprostol pills safely with less medical supervision? AB - Medical methods of early abortion differ from surgical methods in that women themselves can potentially ad-minister the regimens. As currently researched and offered, however, the main regimen used for medical abortion, mifepristone-misoprostol, is highly medicalized, involving several clinic visits and extensive physician involvement. We re-examined the role of clinical supervision in each step of the abortion process. using data collected during a large clinical trial of mifepristone-misoprostol abortions in the US, fielded during 1994-1995. The trial was carried out in 17 geographically diverse centers, including private, public, and nongovernmental organization clinics, and enrolled 2121 women, aged 18-45 years, seeking early abortion (:563 days since last menstrual period). Women received 600 mg oral mifepristone, followed 48 h later by 400 mug oral misoprostol. Evidence suggests that most women can handle most steps of the medical abortion process themselves, effectively and safely. The utility of clinic visits to ingest mifepristone and misoprostol is questionable. For many women, even the follow-up visit could perhaps be replaced by telephone follow-up, combined with home pregnancy tests. Alternatives to the present protocol might allow greater control, comfort, and convenience at lower cost. Where clinician involvement might be useful, mid-level health care providers typically possess the skills necessary to offer the method safely, implying that physicians might be necessary only as complications arise. Future research useful for determining the optimal amount of medical involvement to provide mifepristone-misoprostol safely and effectively should include self-screening tests, label comprehension tests, calendars to aid in calculating gestational age, and the development of special pregnancy tests with telephone Follow-up. (C) 2002 Elsevier Science Inc. All iights reserved MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 10 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000174844000003 L2 - abortion;mifepristone;misoprostol;home use;United States;EARLY-PREGNANCY TERMINATION; VAGINAL MISOPROSTOL; UNITED-STATES; POSTCOITAL CONTRACEPTION; VACUUM ASPIRATION; BLOOD-LOSS; ABORTION; TRIAL; ACCEPTABILITY; CHINA SO - Contraception 2002 ;65(2):133-142 5636 UI - 11808 AU - Harrington L AU - White J AU - Grace P AU - Hodson D AU - Hartkamp AD AU - Vaughan C AU - Meisner C AD - Int Maize & Wheat Improvement Ctr, CIMMYT, Mexico City 06600, DF, MexicoSinclair Knight Merz, Brisbane, Qld, AustraliaProd Org Grains Seeds & Pulses, The Hague, NetherlandsHarrington, L, Int Maize & Wheat Improvement Ctr, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Delivering the goods: Scaling out results of natural resource management research AB - To help integrated natural resource management (INRM) research "deliver the goods" for many of the world's poor over a large area and in a timely manner, the authors suggest a problem-solving approach that facilitates the scaling out of relevant agricultural practices. They propose seven ways to foster scaling out: (1) develop more attractive practices and technologies through participatory research (2) balance supply-driven approaches with resource user demands, (3) use feedback to redefine the research agenda, (4) encourage support groups and networks for information sharing, (5) facilitate negotiation among stakeholders, (6) inform policy change and institutional development, and (7) make sensible use of information management tools, including models and geographic information systems (GIS). They also draw on experiences in Mesoamerica, South Asia, and southern Africa to describe useful information management tools, including site similarity analyses, the linking of simulation models with GIS, and the use of fanner and land type categories MH - Australia MH - Mexico|Distrito Federal MH - Netherlands PB - WOLFVILLE: RESILIENCE ALLIANCE RP - NOT IN FILE U3 - TC 1 U4 - Ecology U5 - J;Article AV - English IS - 1195-5449 UR - ISI:000173848000014 L2 - Mexico;South Asia;Southern Africa;conservation tillage;diffusion of research;environments;geographic information systems;natural resource management;participatory research;scaling out;simulation models;technology transfer;SYSTEMS SO - Conservation Ecology 2002 ;5(2): 5637 UI - 9044 AU - Harris PM AU - Mayden RL AU - Perez HSE AU - de Leon FG AD - Univ Alabama, Dept Biol Sci, Tuscaloosa, AL 35487, USASt Louis Univ, Dept Biol, St Louis, MO 63103, USANatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoInst Tecnol Ciudad Victoria, Lab Biol Integrat, Tamaulipas 87010, MexicoHarris, PM, Univ Alabama, Dept Biol Sci, Box 870345, Tuscaloosa, AL 35487 USA TI - Phylogenetic relationships of Moxostoma and Scartomyzon (Catostomidae) based on mitochondrial cytochrome b sequence data AB - A recent phylogenetic study based on morphological, biochemical and early life history characters resurrected the genus Scartomyzon (jumprock suckers, c. eight-10 species) from Moxostoma (redhorse suckers, c. 10-11 species) and advanced the understanding of relationships among species in these two genera, and the genealogical affinities of these genera with other evolutionary lineages within the tribe Moxostomatini in the subfamily Catostominae. To further examine phylogenetic relationships among moxostomatin suckers, the complete mitochondrial (mt) cytochrome b gene was sequenced from all species within this tribe and representative outgroup taxa from the Catostomini and other catostomid subfamilies. Phylogenetic analysis of gene sequences yielded two monophyletic clades within Catostominae: Catostomus + Deltistes + Xyrauchen + Erimyzon + Minytrema and Moxostoma + Scartomyzon + Hypentelium + Thoburnia. Within the Moxostomatini, Thoburnia was either unresolved or polyphyletic; Thoburnia atripinnis was sister to a monophyletic Hypentelium. In turn, this clade was sister to a monophyletic clade containing Scartomyzon and Moxostoma. Scartomyzon was never resolved as monophyletic, but was always recovered as a polyphyletic group embedded within Moxostoma, rendering the latter genus paraphyletic if 'Scartomyzon' continues to be recognized. Relationships among lineages within the Moxostoma and 'Scartomyzon' clade were resolved as a polytomy. To better reflect phylogenetic relationships resolved in this analysis, the following changes to the classification of the tribe Moxostomatini are proposed: subsumption of 'Scartomyzon' into Moxostoma; restriction of the tribe Moxostomatini to Moxostoma; resurrect the tribe Erimyzonini, containing Erimyzon and Minytrema, classified as incertae sedis within Catostominae; retain the tribe Thoburniini. (C) 2002 The Fisheries Society of the British Isles. Published by Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-1112 UR - ISI:000181220000009 L2 - Catostomidae;Catostominae;Moxostoma;Scartomyzon;molecular phylogeny;mtDNA cytochrome b;DUPLICATE GENE-EXPRESSION; FRESH-WATER FISHES; SPECIES CONCEPTS; TELEOSTEI; CYPRINIFORMES; BIOGEOGRAPHY; CYPRINIDAE; LIMITS SO - Journal of Fish Biology 2002 ;61(6):1433-1452 5638 UI - 9482 AU - Harrison NA AU - Narvaez M AU - Almeyda H AU - Cordova I AU - Carpio ML AU - Oropeza C AD - Univ Florida, Res & Educ Ctr, Ft Lauderdale, FL 33314, USACtr Invest Cient Yucatan, Merida, Yucatan, MexicoINIFAP, Monterrey, Nuevo Leon, MexicoHarrison, NA, Univ Florida, Res & Educ Ctr, 3205 Coll Ave, Ft Lauderdale, FL 33314 USA TI - First report of group 16SrIV phytoplasmas infecting coconut palms with leaf yellowing symptoms on the Pacific coast of Mexico MH - USA MH - Mexico|Nuevo Leon MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences U5 - J;Editorial Material AV - English IS - 0032-0862 UR - ISI:000180061200027 SO - Plant Pathology 2002 ;51(6):808-808 5639 UI - 10354 AU - Hartkamp AD AU - Hoogenboom G AU - White JW AD - Univ Wageningen & Res Ctr, Grp Plant Prod Syst, NL-6700 AK Wageningen, NetherlandsUniv Georgia, Dept Biol & Agr Engn, Griffin, GA 30223, USACIMMYT, Nat Resources Grp, Mexico City 06600, DF, MexicoHartkamp, AD, Univ Wageningen & Res Ctr, Grp Plant Prod Syst, POB 430, NL-6700 AK Wageningen, Netherlands TI - Adaptation of the CROPGRO growth model to velvet bean (Mucuna pruriens) I. Model development AB - Velvet bean (Mucuna pruriens (L.) DC cv. group utilis) is widely promoted as a GMCC for tropical regions. Reports of insufficient biomass production in certain environments and concerns over seed production, however, suggest a need for a more complete description of growth and development of velvet bean under different production scenarios and environments. Process-based simulation models offer the potential for facilitating an assessment of management strategies for different environments, soils and production systems. The objective of this study was to review the physiology of velvet bean and using the generic legume model CROPGRO, to provide a structured and quantitative framework for describing crop response to management and environment. Model coefficients used to describe growth and development of soybean (Glycine max (L.) Merr.) served as initial reference values. Information on velvet bean from published sources was then used to revise the functions and parameters of the model. Phenology, canopy development, growth and partitioning were calibrated for two velvet bean varieties using experimental data from three sites in Mexico. Compared to soybean, velvet bean has a much longer growth cycle, allowing a very large numbers of nodes to form. Velvet bean has larger, thinner leaves than soybean, resulting in more rapid leaf area development, and larger seeds, which affects germination, early season growth and pod development. A modification to CROPGRO to track senesced tissues was incorporated. Overall, the physiological processes underlying growth and development of velvet bean appear to be similar to other tropically adapted legumes. The new model, incorporated as part of the DSSAT, version 3.5 suite of crop simulation models, has potential for evaluating management strategies in specific environments and to identify potential regions for introduction of velvet bean as a green manure cover crop. Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000177722800002 L2 - green manure cover crop;simulation modeling;DSSAT;SOYBEAN-CHICKPEA ROTATION; WATER-BALANCE; LEGUMES; YIELDS; COVER SO - Field Crops Research 2002 ;78(1):9-25 5640 UI - 10355 AU - Hartkamp AD AU - Hoogenboom G AU - Gilbert RA AU - Benson T AU - Tarawali SA AU - Gijsman AJ AU - Bowen W AU - White JW AD - Univ Wageningen & Res Ctr, NL-6700 AK Wageningen, NetherlandsUniv Georgia, Dept Biol & Agr Engn, Griffin, GA 30223, USAUniv Florida, Everglades Res & Educ Ctr, Belle Glade, FL 33430, USAInt Food Policy Res Inst, Lilongwe 3, MalawiInt Inst Trop Agr, Ibadan, NigeriaInt Livestock Res Inst, Ibadan, NigeriaInt Ctr Trop Agr, Sustainable Syst Smallholders Project, Cali, ColombiaInt Fertilizer Dev Ctr, Lima, PeruInt Potato Improvement Ctr, Lima 12, PeruCIMMYT, Nat Resources Grp, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoHartkamp, AD, Univ Wageningen & Res Ctr, POB 430, NL-6700 AK Wageningen, Netherlands TI - Adaptation of the CROPGRO growth model to velvet bean (Mucuna pruriens) II. Cultivar evaluation and model testing AB - Velvet bean (Mucuna pruriens (L.) DC. cv.-group utilis) is widely promoted in tropical and sub-tropical regions as a green manure cover crop that can reduce weed growth and soil erosion and enhance soil fertility. To provide these benefits, the crop must attain rapid ground cover and develop substantial aboveground biomass. To assist biophysical targeting of the crop to environments that can provide adequate growth conditions, the CROPGRO model was adapted to simulate velvet bean growth and development. This paper evaluates the performance of the model for phenology, growth, senescence and N accumulation for multiple locations that represent a range of environmental and agronomic management scenarios. Vegetative development, as described by main stem leaf appearance rate, varied linearly with thermal time. Time to flowering showed departures from the linear photoperiod response used in the model. Additional research is required to determine whether the crop is influenced by factors besides photoperiod and air temperature, especially water and nutrient deficits. The linear response to photoperiod did, however, provide reasonable values for partitioning to vegetative, reproductive and senesced materials. Simulation of nitrogen concentration for various plant components matched observed data. Sensitivity analyses evaluating the ability of the crop to provide ground cover, intercept light and develop adequate growth for soil protection and weed suppression indicated that a mean temperature of over 22 degreesC and a soil moisture holding capacity of at least 100 turn are required. The CROPGRO model proved to be a reliable decision support tool for guiding analyses of velvet bean response to crop management and environmental conditions. Further research, however, is warranted to improve its predictive capability, especially for phenology. Published by Elsevier Science B.V MH - Colombia MH - Malawi MH - Mexico|Distrito Federal MH - Netherlands MH - Nigeria MH - Peru MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000177722800003 L2 - crop management;DSSAT;environmental conditions;green manure;ground cover;N fixation;sensitivity analysis;sustainability;LEAF APPEARANCE; TEMPERATURE; WHEAT; PHOTOPERIOD; EMERGENCE; PHENOLOGY; BARLEY; RATES; DATE SO - Field Crops Research 2002 ;78(1):27-40 5641 UI - 11324 AU - Hartley DJ AU - Riedinger LL AU - Danchev M AU - Reviol W AU - Zeidan O AU - Zhang JY AU - Galindo-Uribarri A AU - Gross CJ AU - Baktash C AU - Lipoglavsek M AU - Paul SD AU - Radford DC AU - Yu CH AU - Sarantites DG AU - Devlin M AU - Carpenter MP AU - Janssens RVF AU - Seweryniak D AU - Padilla E AD - Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAWashington Univ, Dept Chem, St Louis, MO 63130, USAOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAArgonne Natl Lab, Div Phys, Argonne, IL 60439, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoHartley, DJ, Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA TI - Toward complete spectroscopy of Pr-128 and rotational structures in Pr-126 AB - Over 240 transitions and three new rotational bands have been observed in the well-deformed, odd-odd Pr-128(59)69 nucleus. The high-spin states were populated in two experiments using the Mo-92(Ca-40,3pn) reaction at beam energies of 170 and 184 MeV. Several structures were confirmed in the former experiment using the Clarion and HyBall arrays with the recoil mass spectrometer at Oak Ridge National Laboratory. Gammasphere, in conjunction with the Microball, were employed in the latter experiment at Argonne National Laboratory to extend the sequences to very high spins. Rotational structures in Pr-126 were also identified in the alphapn channel of the same reaction. The recent discrepancies of spin assignments for the yrast bands in Pr-126,Pr-128 and the interpretation of the lowest crossing in the pih(11/2) band in Pr-127 are discussed. An adiabatic crossing of the intruder i(13/2) neutron with one of the normal-deformed bands in Pr-128 is observed at high rotational frequency. Experimental trends in the signature inversion phenomenon of the pih(11/2)nuh(11/2) bands in the Aapproximate to130 region are defined and prove to be surprisingly irregular with respect to those found in the pih(11/2)nui(13/2) bands of the Aapproximate to160 region MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000175186200050 L2 - ODD-ODD NUCLEI; HIGH-SPIN STATES; SIGNATURE INVERSION; DRIP-LINE; DETAILED SPECTROSCOPY; ENHANCED-DEFORMATION; BAND STRUCTURES; EXCITED-STATES; REGION; TRIAXIALITY SO - Physical Review C 2002 ;65(4): 5642 UI - 9577 AU - Hashimoto H AU - Ushio K AU - Kaneko T AU - Kobayashi K AU - Greenberg JM AU - Yamashita M AU - Brack A AU - Colangeli L AU - Horneck G AU - Ishikawa Y AU - Kouchi A AU - Navarro-Gonzalez R AU - Oshima T AU - Raulin F AU - Saito T AD - Univ Tsukuba, Inst Engn Mech & Syst, Tsukuba, Ibaraki 3058573, JapanYokohama Natl Univ, Dept Chem & Biochem, Yokohama, Kanagawa 2408501, JapanLeiden Univ, Astrophys Lab, NL-2300 RA Leiden, NetherlandsInst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, JapanCNRS, Ctr Biophys Mol, F-45071 Orleans 2, FranceOsserv Astron Capodimonte, I-80131 Naples, ItalyDLR, Inst Aerosp Med, D-51140 Cologne, GermanyObayashi Corp, Tech Res Inst, Kiyose 2040011, JapanHokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, JapanNatl Autonomous Univ Mexico, Inst Nucl Sci, Mexico City 04510, DF, MexicoTokyo Univ Pharm & Life Sci, Dept Mol Biol, Hachioji, Tokyo 1920355, JapanUniv Paris 07, LISA CNRS, F-94010 Creteil, FranceUniv Paris 12, LISA CNRS, F-94010 Creteil, FranceUniv Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, JapanHashimoto, H, Univ Tsukuba, Inst Engn Mech & Syst, Tsukuba, Ibaraki 3058573, Japan TI - Formation of prebiotic organics in space: Its simulation on ground and conceptual design of space experiment in earth orbit AB - The formation of prebiotic organics in outer space has been simulated on ground. In order to verify abiotic formation of such compounds in earth orbit, the concept of cosmobiology experiment was developed. Simulated interstellar ice over dust grains is exposed to vacuum ultraviolet light and other space environment to induce organic formation. A system configuration and its engineering specification were,determined to meet the scientific requirements, which were defined by the ground based study. The system consists of cryogenics to keep volatile species solidified, optics to filter and amplify the ultraviolet portion of the solar light for the accelerated irradiation of sample, and analysis subsystem to evaluate formation of organics in-situ together with post flight analysis of involatile products in trace. (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Germany MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000179771000014 L2 - INTERSTELLAR SO - Space Life Sciences: Extraterrestrial Organic Chemistry, Uv Radiation on Biological Evolution, and Planetary Protection 2002 ;30(6):1495-1500 5643 UI - 10969 AU - Hashimoto JM AU - Nabeshima EH AU - Cintra HS AU - Dias ARG AU - Bustos FM AU - Chang YK AD - Univ Estadual Campinas, Fac Engn Alimentos, Dept Tecnol Alimentos, BR-13083970 Campinas, SP, BrazilIPN, Ctr Invest & Estudios Avanzados, Queretaro 7600, Qro, MexicoChang, YK, Univ Estadual Campinas, Fac Engn Alimentos, Dept Tecnol Alimentos, Caixa Postal 6121, BR-13083970 Campinas, SP, Brazil TI - Effect of processing conditions on some functional characteristics of extrusion-cooked cassava starch/wheat gluten blends AB - Extrusion-cooked blends of cassava starch (CS) and wheat gluten (WG) were studied. The data were analysed using response surface methodology. The results showed the formation of new structures characterised by lower radial expansion (RE) and specific volume (SV) when gluten was added to CS. WG content was the most important variable affecting RE, water absorption index (WAI), water solubility index (WSI), SV and difference in colour (DeltaE) of the extruded products, but feed moisture content and barrel temperature also influenced RE. WAI was affected by a significant interaction between WG content and barrel temperature. The extruded products had lower WAI values and higher WSI values than WG-free products. Heat, high shear rate and high pressure during extrusion cooking caused mechanical destruction or denaturation of the WG and gelatinisation and dextrinisation of the starch components. The extruded blends could have diverse applications. (C) 2002 Society of Chemical Industry MH - Brazil MH - Mexico|Queretaro PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000175980700023 L2 - moisture;temperature;extrusion;blends;cassava starch;wheat gluten;WHEAT GLUTEN; PROTEIN BLENDS; TEMPERATURE; FLOUR; MIXTURES; PRODUCTS; HEAT SO - Journal of the Science of Food and Agriculture 2002 ;82(8):924-930 5644 UI - 11041 AU - Hass CC AU - Valenzuela D AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, Mexico, USA Garrison, ATZS ISB Wildlife, Ft Huachuca, AZ 85313 USAUniv Autonoma Estado Morelos, Cuernavaca 62210, Morelos, MexicoValenzuela, D, Univ Nacl Autonoma Mexico, Inst Ecol, AP 70-270,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Anti-predator benefits of group living in white-nosed coatis (Nasua narica) AB - Predation is often considered an important factor in the evolution of sociality among animals. We studied mortality patterns and grouping behavior of white-nosed coatis (Nasua narica) at sites in southern Arizona, USA, and western Jalisco, Mexico. Coatis were monitored by radio-tracking and recaptures for more than 3 years at each site. In both populations, predation by large felids, including jaguars (Panthera onca) and pumas (Plana concolor), accounted for more than 50% of mortality of adult coatis. Predation rates were significantly higher on solo coatis than on coatis in groups at both study sites. Predation rates were negatively related to group size in Arizona. However, mortality of juveniles, as measured by the ratios of juveniles to adult females, was not related to the number of adult females per group in Arizona or Jalisco. Coatis exhibit a suite of behaviors, including foraging with the juveniles in the center of the group, sharing vigilance, alarm calling, mobbing and attacking predators, and a highly synchronous birth season, that are all consistent with the hypothesis that predation has played an important role in shaping coati social behavior MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 17 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 0340-5443 UR - ISI:000175867800009 L2 - Nasua narica;predation;group living;survival analysis;radio-telemetry;BARRO-COLORADO ISLAND; GROUP-SIZE; CEBUS-CAPUCINUS; BIRTH SYNCHRONY; SOCIAL-BEHAVIOR; MORTALITY-RATES; FORAGING COSTS; PANTHERA-ONCA; ECOLOGY; RANGE SO - Behavioral Ecology and Sociobiology 2002 ;51(6):570-578 5645 UI - 11072 AU - Hassanien TI AU - Cooksley WGE AU - Sulkowski M AU - Smith C AU - Marinos G AU - Lai MY AU - Pastore G AU - Trejo-Estrada R AU - Horta A AU - Vale E AU - Wintfeld NS AU - Neary M AU - Green J AD - Univ Calif San Diego, Ctr Liver, San Diego, CA 92103, USARoyal Brisbane Hosp, Brisbane, Qld 4029, AustraliaJohns Hopkins Univ, Baltimore, MD, USAMinn Clin Res Ctr, St Paul, MN, USAPrince Wales Hosp, Randwick, NSW 2031, AustraliaNatl Taiwan Univ Hosp, Taipei, TaiwanUniv Policlin, Bari, ItalyCtr Med Nacl Siglo XXI, Mexico City, DF, MexicoClin Diagnost Med Integral, Vila Nova De Gaia, PortugalHoffmann La Roche Inc, Nutley, NJ 07110, USA TI - QoL benefits observed as early as week 2 with peginterferon alfa-2a (40KD) (pegasys) in combination with ribavirin (RBV) versus interferon alfa-2b plus RBV MH - Australia MH - Italy MH - Mexico|Distrito Federal MH - Portugal MH - Taiwan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0168-8278 UR - ISI:000175704700384 SO - Journal of Hepatology 2002 ;36():110-110 5646 UI - 10307 AU - Haus JW AU - Soon BY AU - Scalora M AU - Sibilia C AU - Mel'nikov IV AD - Univ Dayton, Electroopt Program, Dayton, OH 45469, USA, USA, Missile Command, Ctr Res Dev & Engn, Weapons Sci Directorate,AMSMI RD WS ST, Redstone Arsenal, AL 35898 USAUniv Roma La Sapienza, Dipartimento Energet, Ist Nazl Fis Mat, I-00161 Rome, ItalyUniv Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaHaus, JW, Univ Dayton, Electroopt Program, Dayton, OH 45469, USA TI - Coupled-mode equations for Kerr media with periodically modulated linear and nonlinear coefficients AB - We apply the multiple-scales formalism to derive a complete set of equations for a finite medium with periodic linear and nonlinear Kerr optical coefficients. The equations for a single-frequency field reveal three new, nonlinear terms that are related to the difference in the Kerr nonlinearity in two-component media. The nonlinear evolution of coupled forward and backward fields in a multilayered film is numerically simulated by a spectral method. We examine the linear stability of the steady-state solution for an infinite medium and extend previous discussions of modulational instabilities to the new set of equations. We find that the inhomogeneous coefficient can selectively suppress modulational instability in the longitudinal or transverse direction. (C) 2002 Optical Society of America MH - Italy MH - Mexico|Morelos MH - Russia MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000177881600039 L2 - PHOTONIC BAND-EDGE; 2ND-HARMONIC GENERATION; PULSE-PROPAGATION; GAP STRUCTURES; WAVE-GUIDES; SOLITONS SO - Journal of the Optical Society of America B-Optical Physics 2002 ;19(9):2282-2291 5647 UI - 8192 AU - Hawes MC AU - Bengough G AU - Cassab G AU - Ponce G AD - Univ Arizona, Dept Plant Pathol, Tucson, AZ 85721, USAScottish Crop Res Inst, Dundee DD2 5DA, ScotlandUNAM, IBT, Cuernavaca, Morelos, MexicoHawes, MC, Univ Arizona, Dept Plant Pathol, Tucson, AZ 85721, USA TI - Root caps and rhizosphere AB - in this paper we discuss recent work on the physiological, molecular, and mechanical mechanisms that underlie the capacity of root caps to modulate the properties of the rhizosphere and thereby foster plant growth and development. The root cap initially defines the rhizosphere by its direction of growth, which in turn occurs in response to gradients in soil conditions and gravity. The ability of the root cap to modulate its environment is largely a result of the release of exudates and border cells, and so provides a potential method to engineer the rhizosphere. Factors affecting the release of border cells from the outer surface of the root cap, and function of these cells and their exudates in the rhizosphere, are considered in detail. Release of border cells into the rhizosphere depends on soil matric potential and mechanical impedance, in addition to a host of other environmental conditions. There is good evidence of unidentified feedback signals between border cells and the root cap meristem, and some potential mechanisms are discussed. Root border cells play a significant mechanical role in decreasing frictional resistance to root penetration, and a conceptual model for this function is discussed. Root and border cell exudates influence specific interactions between plant hosts and soil organisms, including pathogenic fungi. The area of exudates and border cell function in soil is an exciting and developing one that awaits the production of appropriate mutant and transgenic lines for further study in the soil environment MH - Mexico|Morelos MH - United Kingdom MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0721-7595 UR - ISI:000183628600009 L2 - root caps;rhizosphere;plant growth;BORDER CELLS; ZEA-MAYS; QUIESCENT CENTER; AGROBACTERIUM-TUMEFACIENS; FRICTIONAL RESISTANCE; PHYSICAL-PROPERTIES; GENE-EXPRESSION; PISUM-SATIVUM; SPRING WHEAT; GROWTH SO - Journal of Plant Growth Regulation 2002 ;21(4):352-367 5648 UI - 10475 AU - Hawkins RM AU - Lidsey JE AD - Univ London, Queen Mary, Sch Math Sci, Astron Unit, London E1 4NS, EnglandIPN, Ctr Invest & Estudios Avanzados, Mexico City 07738, DF, MexicoHawkins, RM, Univ London, Queen Mary, Sch Math Sci, Astron Unit, Mile End Rd, London E1 4NS, England TI - Ermakov-Pinney equation in scalar field cosmologies AB - It is shown that the dynamics of cosmologies sourced by a mixture of perfect fluids and self-interacting scalar fields are described by the nonlinear, Ermakov-Pinney equation. The general solution of this equation can be expressed in terms of particular solutions to a related, linear differential equation. This characteristic is employed to derive exact cosmologies in the inflationary and quintessential scenarios. The relevance of the Ermakov-Pinney equation to the braneworld scenario is discussed MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Review AV - English IS - 0556-2821 UR - ISI:000177285600033 L2 - DEPENDENT HARMONIC-OSCILLATOR; ELLIPTIC GAUSSIAN BEAMS; ANGULAR POWER SPECTRUM; CHAOTIC INFLATION; EXTRA DIMENSION; EXACT INVARIANTS; SITTER SPACE; OF-STATE; UNIVERSE; MODELS SO - Physical Review D 2002 ;66(2): 5649 UI - 9603 AU - Hayashi N AU - Naumkin PI AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanInst Matemat, Morelia 58089, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - A quadratic nonlinear Schrodinger equation in one space dimension AB - In this paper, we study the Cauchy problem for the quadratic derivative nonlinear Schrodinger equation (*) iu(t) + u(xx) = ((u) over bar (x))(2), (t,x) is an element of R-2, u(0,x) = u(0), xis an element ofR. We suppose that the initial data are small in the weighted Sobolev space H-3,H-1(R) then we prove that there exist global in time small solutions to the Cauchy problem (*). We study the large time behavior of solutions and construct the modified asymptotics for large time values. (C) 2002 Elsevier Science (USA). All rights reserved MH - Japan MH - Mexico|Michoacan PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0022-0396 UR - ISI:000179818500008 L2 - nonlinear schrodinger equation;large time asymptotics;KLEIN-GORDON EQUATIONS; GLOBAL EXISTENCE SO - Journal of Differential Equations 2002 ;186(1):165-185 5650 UI - 9763 AU - Hayashi N AU - Kaikina EI AU - Naumkin PI AD - Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoUniv Michoacana, Inst Fis & Mtemat, Morelia 58040, Michoacan, Mexico TI - Asymptotic expansion of small solutions to the Landau-Ginzburg type equations AB - We obtain the large time asymptotic expansion of small solutions to the Landau-Ginzburg type equations [GRAPHICS] where alpha,beta is an element of C, Ralpha > 0, R(beta/root2\alpha\(2) + alpha(2)) greater than or equal to 0, under the condition that the initial data phi are sufficiently small in a suitable weighted norm and the mean value integral phi(x) dx not equal 0 MH - Japan MH - Mexico|Michoacan PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0921-7134 UR - ISI:000179439600001 L2 - dissipative nonlinear evolution equation;asymptotic expansions;Landau-Ginzburg equation;LARGE TIME BEHAVIOR; SEMILINEAR PARABOLIC EQUATION; CAUCHY-PROBLEM; LOCAL SPACES SO - Asymptotic Analysis 2002 ;32(2):91-106 5651 UI - 10172 AU - Hayashi N AU - Kaikina EI AU - Paredes HFR AD - Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, Japan TI - Korteweg-de Vries-Burgers equation on a half-line with large initial data AB - We study the following initial-boundary value problem for the Korteweg-de Vries-Burgers equation [GRAPHICS] We prove that if the initial data mu(0) is an element of H-0,H-omega boolean AND H-1,H-0 where omega is an element of (1/2, 3/2), then there exists a unique solution u is an element of C ([0,infinity) H-l,H-omega) of the initial-boundary value problem (0.1). Moreover if the initial data are such that x(l+mu)u(0)(x) is an element of L-1, mu = omega - 1/2, then there exists a constant A such that the solution has the following asymptotics [GRAPHICS] for t --> infinity uniformly with respect to x > 0 MH - Japan MH - Mexico|Michoacan PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1424-3199 UR - ISI:000178285900003 L2 - dissipative nonlinear evolution equation;large time asymptotics;Korteweg-de Vries-Burgers equation;DISSIPATION; TIME SO - Journal of Evolution Equations 2002 ;2(3):319-347 5652 UI - 10188 AU - Hayashi N AU - Naumkin PI AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - Large time behavior for the cubic nonlinear Schrodinger equation AB - We consider the Cauchy problem for the cubic nonlinear Schrodinger equation in one space dimension (1) {iu(t) + 1/2u(xx) + (u) over bar (3) = 0, t is an element of R, x is an element of R, u(0, x) = u(0)(x), x is an element of R. Cubic type nonlinearities in one space dimension heuristically appear to be critical for large time. We study the global existence and large time asymptotic behavior of solutions to the Cauchy problem 1). We prove that if the initial data u(0) is an element of H-1,H-0 boolean AND H-0,H-1 are small and such that sup(\xi\less than or equal to1) \arg Fu(0)(xi) - pin/2\ < pi/8 for some n is an element of Z, and inf(\xi\less than or equal to1) \Fu(0)(xi)\ > 0, then the solution has an additional logarithmic time-decay in the short range region \x\ less than or equal to roott. In the far region \x\ > roott the asymptotics have a quasi-linear character MH - Japan MH - Mexico|Michoacan PB - OTTAWA: CANADIAN MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0008-414X UR - ISI:000178287900007 L2 - LONG-RANGE SCATTERING; ONE SPACE DIMENSION; HARTREE-EQUATIONS; WAVE-OPERATORS; MAGNETIC-FIELD; EXISTENCE SO - Canadian Journal of Mathematics-Journal Canadien de Mathematiques 2002 ;54(5):1065-1085 5653 UI - 11944 AU - Hayashi N AU - Kaikina EI AU - Shishmarev IA AD - Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoMoscow MV Lomonosov State Univ, Dept Computat Math & Cybernet, Moscow 119899, RussiaHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Osaka 5600043, Japan TI - Asymptotics of solutions to the boundary value problem for the Korteweg-de Vries-Burgers equation on a half-line AB - We study the following initial-boundary value problem for the Korteweg-de Vries-Burgers equation, u(t) + (-1)(alpha) uu(x) - u(xx) + (-1)(alpha)u(xxx) = 0, (x, t) is an element of R+ x R+, (0.1) u(x,0) = u(0)(x), x is an element of R+, partial derivative(x)(n)u(0, t) = 0, n = 0, alpha, t is an element of R+, where alpha = 0, 1. We prove that if the initial data u(0) is an element of H-0,H-w boolean AND H-1,H-0, where H-s,H-k = {f is an element of L-2; parallel tofparallel to(Hs,k) = parallel to(k) 'fparallel to(L)(2) < infinity}, w is an element of (1/2, 3/2), and the norm parallel tou(0)parallel to(H)(0,w) + parallel tou(0)parallel to(H)(1,0) is sufficiently small, then there exists a unique solution u is an element of C([0, infinity), H-0,H-x) boolean AND C((0, infinity),H-1,H-w) of the initial-boundary value problem (0.1), where x is an element of (0,1/2). Moreover, if the initial data are such that x(1+mu)u(0)(x) is an element of L-1, mu = w - 1/2 then there exists a constant A such that the solution has the asymptotics u(x,t)= A/t Phi(alpha) (x/2roott, t)+O(min(x/roott, 1) t(-1-mu/2)) for t --> infinity uniformly with respect to x > 0, where alpha = 0, 1, Phi(0)(q, t) = (q/rootpi)(e-q2), Phi(1), (q, t) = (1/2rootpiroott) (e(-q2) (2qroott - 1) + e(-2qroott)). (C) 2002 Elsevier Science MH - Japan MH - Mexico|Michoacan MH - Russia PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000173372900009 L2 - dissipative nonlinear evolution equation;large time asymptotics;Korteweg-de Vries-Burgers equation;half-line;DISSIPATION SO - Journal of Mathematical Analysis and Applications 2002 ;265(2):343-370 5654 UI - 11995 AU - Hayashi N AU - Naumkin P AD - Osaka Univ, Dept Math, Grad Sch Sci, Toyonaka, Osaka 5600043, JapanUniv Michoacana, Inst Fis & Matemat, Michoacan 58040, MexicoHayashi, N, Osaka Univ, Dept Math, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan TI - On the reduction of the modified Benjamin-Ono equation to the cubic derivative nonlinear Schrodinger equation AB - We study the asymptotic behavior for large time of small solutions to the Cauchy problem for the modified Benjamin-Ono equation: u(t) + (u(3))(x) + Hu(xx) = 0, where H is the Hilbert transformation, x,t epsilon R. We investigate the reduction of the modified Benjamin-Ono equation to the cubic derivative nonlinear Shrodinger equation and then apply techniques developed in [11] - [14] to the resulting cubic nonlocal nonlinear Schrodinger equation. Our method is simpler than that used in [10] because we can use the factorization of the free Schrodinger group. Our purpose in this paper is to show that solutions have the same L-infinity time decay rate as in the corresponding linear Benjamin-Ono equation and to prove the existence of modified scattering states, when the initial data are sufficiently small in the weighted Sobolev spaces H-2,H-0 boolean AND H-1,H-1, where H-m,H-s = {phi epsilon S' : parallel tophiparallel to(m,s) = parallel to(1 + x(2))(s/2)(1 - partial derivative(x)(2))(m/2)phiparallel to(L2) < infinity}, m, s epsilon R. This is an improvement of the previous result [10], where we considered small initial data from the space H-3,H-0 boolean AND H-1,H-2. Our method is based on a certain gauge transformation and an appropriate phase function MH - Japan MH - Mexico|Michoacan PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000173251000015 L2 - modified B-O equation;asymptotic behavior of solutions;modified scattering states;SMOOTHING PROPERTIES; CAUCHY-PROBLEM; REGULARITY SO - Discrete and Continuous Dynamical Systems 2002 ;8(1):237-255 5655 UI - 12241 AU - Hayashi N AU - Kaikina EI AU - Manzo R AD - Sci Univ Tokyo, Dept Appl Math, Shinjuku Ku, Tokyo 1628601, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58080, Michoacan, MexicoHayashi, N, Sci Univ Tokyo, Dept Appl Math, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan TI - Local and global existence of solutions to the nonlocal Whitham equation on half-line MH - Japan MH - Mexico|Michoacan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0362-546X UR - ISI:000172505700004 L2 - nonlocal nonlinear equation;dissipative equation;large time asymptotics;boundary value problem on half-line SO - Nonlinear Analysis-Theory Methods & Applications 2002 ;48(1):53-75 5656 UI - 11114 AU - Hayashi T AU - Terrones M AU - Scheu C AU - Kim YA AU - Ruhle M AU - Nakajima T AU - Endo M AD - Shinshu Univ, Fac Engn, Nagano 3808553, JapanUniv Sussex, CPES, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandIPICYT, Adv Mat Dept, San Luis Potosi 78210, MexicoMax Planck Inst Met Res, D-70174 Stuttgart, GermanyAichi Inst Technol, Dept Appl Chem, Toyota 4700392, JapanHayashi, T, Shinshu Univ, Fac Engn, Wakasato 4-17-1, Nagano 3808553, Japan TI - NanoTeflons: Structure and EELS characterization of fluorinated carbon nanotubes and nanofibers AB - For the first time, we report high-resolution electron energy loss spectroscopy (HREELS) studies on fluorinated carbon nanotubes and nanofibers of various diameters. In addition, we have carried out high-resolution transmission electron microscope studies on the material, as well as HREELS elemental line scans, and elemental mappings. From the experimental EEL near edge structure of the F-K edge, we observed that F establishes two different types of bonds with C: covalent and ionic. From the elemental mapping, we noted that F is always uniformly distributed within the fluorinated carbon tubes of diameters >20 nm. EELS calculations using density functional theory confirmed the existence of covalent and ionic F bonded to the carbon within the tubes at similar to685 and 690 eV, respectively, These values are in good agreement with those obtained experimentally MH - United Kingdom MH - Germany MH - Japan MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000175609200012 L2 - INTERCALATED GRAPHITE FIBERS; SIDEWALL FUNCTIONALIZATION SO - Nano Letters 2002 ;2(5):491-496 5657 UI - 10825 AU - Hede AR AU - Skovmand B AU - Ribaut JM AU - Gonzalez-de-Leon D AU - Stolen O AD - CIMMYT, Mexico City 06600, DF, MexicoNorwegian Crop Res Inst, N-6861 Leikanger, NorwayHede, AR, CIMMYT, Apartado Postal 6-641, Mexico City 06600, DF, Mexico TI - Evaluation of aluminium tolerance in a spring rye collection by hydroponic screening AB - Aluminium (Al) tolerance of 63 rye accessions from a world spring rye collection was evaluated using the haematoxylin method and the root growth method. The haematoxylin method is based on the ability of Al-tolerant seedlings to continue root growth following a short pulse treatment with a high Al concentration, while the root growth method uses the root growth and root tolerance index to judge Al tolerance. Significantly higher levels of Al tolerance were found in rye than in the Al-tolerant bread wheat cultivar `Maringa'. Under the assumption that the ability of roots to grow under Al stress is a combination of root vigour (long roots) and Al tolerance, a hypothesis allowing for the differentiation of five genotype classes was suggested. This study demonstrated that the haematoxylin method and the root growth parameter identify genotypes with long root growth under Al stress, but failed to detect Al tolerance in genotypes with poor root vigour. These genotypes can only be identified using the root tolerance index parameter. However, the haematoxylin method is highly suitable for screening large segregating populations derived from improved germplasm that has been preselected for agronomically preferable traits, including plant vigour MH - Mexico|Distrito Federal MH - Norway PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0179-9541 UR - ISI:000176474600011 L2 - Secale cereale;aluminium toxicity;aluminium screening;root vigour;ACID SOILS; WHEAT; TRITICALE; EXPRESSION; HEMATOXYLIN; PHYSIOLOGY; SELECTION; STRESS; ROOTS; GENE SO - Plant Breeding 2002 ;121(3):241-248 5658 UI - 9552 AU - Hedrick AV AU - Perez D AU - Lichti N AU - Yew J AD - Univ Calif Davis, Davis, CA 95616, USAInst Ecol, Veracruz, MexicoPortland State Univ, Dept Biol, Portland, OR 97207, USAUniv Wisconsin, Sch Med, Dept Neurol, Madison, WI, USAHedrick, AV, Univ Calif Davis, 1 Shields Ave, Davis, CA 95616, USA TI - Temperature preferences of male field crickets (Gryllus integer) alter their mating calls AB - Temperature affects the mating displays of many ectothermic animals, yet almost no information exists on the temperature preferences of ectotherms while they are displaying for mates. This study investigated the preferences of displaying male field crickets (Gryllus integer) for microhabitats of different temperatures. G. integer males attract sexually receptive females by calling from cracks in the ground. We collected data from the field on the temperature of male calling sites (cracks in the ground), on the amount of herbaceous cover (which affects crack temperature) surrounding calling sites, and on the temporal properties of male calls at different temperatures. Laboratory experiments demonstrated that males prefer warmer sites and confirmed that temperature influences mating calls. We conclude that males of this ectothermic species prefer to call for mates from warmer sites, and that microhabitat choice on the basis of temperature affects their mating calls, and potentially their reproductive success MH - Mexico|Veracruz MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Behavioral Sciences;Neurosciences;Physiology;Zoology U5 - J;Article AV - English IS - 0340-7594 UR - ISI:000179968700006 L2 - calling;Gryllus;mating displays;temperature;temperature preferences;ACOUSTIC COMMUNICATION; SONG PRODUCTION; SITE SELECTION; BODY-SIZE; THERMOREGULATION; ORTHOPTERA; GRYLLIDAE; RECOGNITION; LEPIDOPTERA; BEHAVIOR SO - Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology 2002 ;188(10):799-805 5659 UI - 9385 AU - Heil M AU - Delsinne T AU - Hilpert A AU - Schurkens S AU - Andary C AU - Linsenmair KE AU - Sousa MS AU - Mckey D AD - CNRS, UM1, UPR 9056, Lab Bot Phytochim & Mycol, FR-34060 Montpellier 2, FranceUniv Nacl Mexico, Inst Biol, Mexico City 04510, DF, MexicoCEFE, CNRS, UPR 9256, Ctr Ecol Fonctionelle & Evolut, FR-34293 Montpellier 5, FranceHeil, M, Lehrstuhl Zool 3, Biozentrum, DE-97074 Wurzburg, Germany TI - Reduced chemical defence in ant-plants? A critical re-evaluation of a widely accepted hypothesis AB - Since its original formulation by Janzen in 1966, the hypothesis that obligate ant-plants (myrmecophytes) defended effectively against herbivores by resident mutualistic ants have reduced their direct, chemical defence has been widely adopted. We tested this hypothesis by quantifying three classes of phenolic compounds (hydrolysable tannins, flavonoids, and condensed tannins) spectrophotometrically in the foliage of 20 ant-plant and non-ant-plant species of the three unrelated genera Leonardoxa, Macaranga and Acacia (and three other closely related Mimosoideae from the genera Leucaena, Mimosa and Prosopis). We further determined biological activities of leaf extracts of the mimosoid species against fungal spore germination (as measure of pathogen resistance), seed germination (as measure of allelopathic activity), and caterpillar growth (as measure of anti-herbivore defence). Condensed tannin content in three of four populations of the non-myrmecophytic Leonardoxa was significantly higher than in populations of the myrmecophyte. In contrast, we observed no consistent differences between ant-plants and non-ant-plants in the Mimosoideae and in the genus Macaranga, though contents of phenolic compounds varied strongly among different species in each of these two plant groups. Similarly, among the investigated Mimosoideae, biological activity against spore or seed germination and caterpillar growth varied considerably but showed no clear relation with the existence of an obligate mutualism with ants. Our results did not support the hypothesis of 'trade-offs' between indirect, biotic and direct, chemical defence in ant-plants. A critical re-evaluation of the published data suggests that support for this hypothesis is more tenuous than is usually believed. The general and well-established phenomenon that myrmecophytes are subject to severe attack by herbivores when deprived of their ants still lacks an explanation. It remains to be studied whether the trade-off hypothesis holds true only for specific compounds (such as chitinases and amides whose cost may be the direct negative effects on plants' ant mutualists), or whether the pattern of dramatically reduced direct defence of ant-plants is caused by classes of defensive compounds not yet studied MH - France MH - Germany MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 23 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000180428700005 L2 - GLIOCLADIUM-ROSEUM; GENUS MACARANGA; ANTIHERBIVORE DEFENSES; LEONARDOXA-AFRICANA; DISEASE RESISTANCE; MEASURING TANNINS; DEFINING TANNINS; RAIN-FOREST; STEM-BORERS; TRADE-OFFS SO - Oikos 2002 ;99(3):457-468 5660 UI - 9757 AU - Heimburger A AU - cevedo-Garcia D AU - Schiavon R AU - Langer A AU - Mejia G AU - Corona G AU - del Castillo E AU - Ellertson C AD - Populat Council, Reg Off Latin Amer & Caribbean, Mexico City 04000, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Hlth & Social Behav, Boston, MA 02115, USAInst Nacl Pediat, Mexico City 04530, DF, MexicoFdn Mexicana Planeac Familiar, Mexico City 14000, DF, MexicoTestamos Funcionando Testa, Mexico City 11000, DF, MexicoGrp Informac Reprod Elegida, Mexico City 04100, DF, MexicoEllertson, C, Populat Council, Reg Off Latin Amer & Caribbean, Escondida 110, Mexico City 04000, DF, Mexico TI - Emergency contraception in Mexico City: knowledge, attitudes, and practices among providers and potential clients after a 3-year introduction effort AB - Emergency contraception (EC) has the potential to reduce unwanted pregnancy significantly, in Mexico as elsewhere. Recent years have seen tremendous growth in programs and research devoted to expanding access to emergency methods worldwide. In Mexico City, we conducted a pre-intervention/post-intervention research study of one way to introduce EC. Following a baseline survey of family planning providers and clients in 1997, we organized and implemented a three-year program of training for health care providers and a multi-faceted information campaign for the general public, including a national toll-free hotline and website. In 2000, we again surveyed family planning clinic providers and clients, using instruments similar to those employed in the baseline study. EC awareness increased significantly from 13% of clients to 32%, and support jumped from 73% to 83%. Providers at study clinics improved method recognition from 88% to 100%. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 15 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000179452600005 L2 - emergency contraception;Mexico;knowledge;attitudes;practices;YUZPE REGIMEN; UNIVERSITY; STUDENTS SO - Contraception 2002 ;66(5):321-329 5661 UI - 9800 AU - Henaut Y AU - Alauzet C AU - Lambin M AD - Univ Toulouse 3, UMR 5552, Lab Ecol Terr, F-31062 Toulouse, FranceUniv Toulouse 3, Lab Neurobiol & Comportement, F-31062 Toulouse, FranceColegio Frontera Sur, Tapachula, Chiapas, MexicoHenaut, Y, Carr Antiguo Aeropuerto Km 2-5,Apartado Postal 36, Tapachula 30700, Chiapas, Mexico TI - Effects of starvation on the search path characteristics of Orius majusculus (Reuter) (Het., Anthocoridae) AB - Orius majusculus (Reuter) is a polyphagous predator bug used to control western flower thrips Frankliniella occidentalis (Pergande). As physiological factors may be highly influential upon the predatory behaviour of Orius spp. we studied the possible impact of starvation on the search path of this bug. Orius majusculus was maintained on a diet of Ephestia kuehniella Zeller (Lep., Pyralidae) eggs in laboratory. Adults were collected immediately after the imaginal moult and were individually placed in Petri dishes with abundant food. Each adult was randomly assigned to one of the following five treatments: immediate observation or starved for 2, 6, 9 or 12 h prior to observation. The observation procedure consisted of placing a single O. majusculus adult at the centre of an empty arena. The displacement of each insect was recorded with a video camera until it had reached the limits of the arena. The recorded paths were digitized and the digitized search path was used to calculate the mean walking speed, the number of stops per second, the duration of stops and the diffusion rate. The results clearly show that, in comparison with unstarved bugs, insects that experienced 6 h of prey deprivation walked more slowly, stopped more frequently and for longer periods, and had a lower rate of diffusion away from the release point. In contrast, all search path variables returned to the levels measured in unstarved bugs in the group that experienced the longest period of starvation (12 h), whereas groups of O. majusculus that had experienced 2 or 9 h of prey deprivation presented intermediate values for all the variables tested. Starvation produced evident changes in the search path characteristics that we assume to be related to physiological states of hunger and energy availability. These behavioural changes related to physiological state could have consequences for the use of this pirate bug in biological control MH - France MH - Mexico|Chiapas PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0931-2048 UR - ISI:000179240500010 L2 - HETEROPTERA; BEHAVIOR SO - Journal of Applied Entomology-Zeitschrift fur Angewandte Entomologie 2002 ;126(9):501-503 5662 UI - 7742 AU - Hendrickson DA AU - Norris SM AU - Schmitter-Soto JJ AD - Univ Texas, Texas Mem Museum, Texas Nat Hist Collect, Austin, TX 78758, USACalif State Univ, Biol Program, Camarillo, CA 93012, USASoc Ictiol Mexicana AC, ECOSUR, MX-77000 Chetumal, QR, MexicoSchmitter-Soto, JJ, Univ Texas, Texas Mem Museum, Texas Nat Hist Collect, PRC 176-R4000,10100 Burnet Rd, Austin, TX 78758 USA TI - Dedication to Dr. Robert "Bob" Rush Miller MH - Mexico|Quintana Roo MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Biographical-Item AV - English IS - 0960-3166 UR - ISI:000184595600002 L2 - conservation;freshwater fishes;history;Mexico;Robert R. Miller;systematics;CYPRINODONTIDAE; PUPFISH SO - Reviews in Fish Biology and Fisheries 2002 ;12(2):113-118 5663 UI - 7746 AU - Hendrickson DA AU - Perez HE AU - Findley LT AU - Forbes W AU - Tomelleri JR AU - Mayden RL AU - Nielsen JL AU - Jensen B AU - Campos GR AU - Romero AV AU - van der Heiden A AU - Camarena F AU - De Leon FJG AD - Univ Texas, Texas Mem Museum, Texas Nat Hist Collect, Austin, TX 78758, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoCtr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Guaymas, Sonora, MexicoUniv N Texas, Environm Sci Program, Dept Biol Sci, Denton, TX 76203, USASt Louis Univ, Dept Biol, St Louis, MO 63103, USAUS Geol Survey, Alaska Sci Ctr, Anchorage, AK, USAUS Fish & Wildlife Serv, Alchesay Williams Creek Natl Fish Hatchery, Whiteriver, AZ, USAUniv Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoUniv Sonora, DICTUS Dept Invest Cient & Tecnol, Hermosillo, Sonora, MexicoCtr Invest Alimentac & Desarrollo AC, Unidad Mazatlan, Mazatlan, Sinaloa, MexicoInst Tecnol Cd Victoria, Lab Biol Integrat, Cd Victoria, Tamaulipas, MexicoHendrickson, DA, Univ Texas, Texas Mem Museum, Texas Nat Hist Collect, PRC 176-R4000,10100 Burnet Rd, Austin, TX 78758 USA TI - Mexican native trouts: a review of their history and current systematic and conservation status AB - While biologists have been aware of the existence of native Mexican trouts for over a century, they have received little study. The few early studies that did muchmore than mention their existence began in the 1930s and continued into the early 1960s, focusing primarily on distributional surveys and taxonomic analyses. Starting in the 1980s the Baja California rainbow trout became the subject of more detailed studies, but very little remains known of mainland trouts of the Sierra Madre Occidental. We review earlier studies and report on our own collections and observations made between 1975 and 2000. We present newly discovered historical evidence that leads us to conclude that a "lost" cutthroat trout, a lineage not previously known from Mexico, was collected more than a century ago from headwaters of the Rio Conchos ( a major tributary of the Rio Grande (= Rio Bravo)), a basin not previously considered to harbor a native trout. We review the last century of regional natural resource management and discuss our own observations of trout habitats. Impacts of logging, road building and overgrazing are widespread and expanding. Many streams suffer from heavy erosion, siltation and contamination, and though long-term hydrologic data are generally not available, there is evidence of decreased discharge in many streams. These problems appear related to region-wide land management practices as well as recent regional drought. Trout culture operations using exotic rainbow trout have rapidly proliferated throughout the region, threatening genetic introgression and/or competition with native forms and predation on them. Knowledge of distribution, abundance, relationships and taxonomy, not to mention ecology and population biology, of native trouts of the Sierra Madre Occidental remains inadequate. Vast areas of most mainland drainages are still unexplored by fish collectors, and even rudimentary information regarding basic biology, ecology and population structure of stocks remains lacking. Concentrated exploration, research and management of this long overlooked and undervalued resource are all urgently needed. The history of natural resources exploitation that placed so many native trouts of the western United States on threatened and endangered species lists is repeating itself in the Sierra Madre Occidental. Without concerted action and development of region-wide socio-economic solutions for current, largely non-sustainable resource management practices, native Mexican trout gene pools will soon be in grave danger of extinction MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Sinaloa MH - Mexico|Sonora MH - Mexico|Tamaulipas MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0960-3166 UR - ISI:000184595600014 L2 - conservation;history;Mexico;native trouts;Oncorhynchus;systematics;ONCORHYNCHUS-MYKISS-NELSONI; SOUTHWESTERN UNITED-STATES; LAMPREYS PETROMYZONTIDAE; SUBGENUS TETRAPLEURODON; BAJA-CALIFORNIA; RAINBOW-TROUT; ARIZONA; LAMPETRA; FISHES; SALMO SO - Reviews in Fish Biology and Fisheries 2002 ;12(2):273-316 5664 UI - 11817 AU - Henney WJ AU - O'Dell CR AU - Meaburn J AU - Garrington ST AU - Lopez JA AD - Inst Astron, Morelia 58089, Michoacan, MexicoVanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoHenney, WJ, Inst Astron, UNAM Campus Morelia,Apartado Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico TI - Mass loss and jet outflow in the Orion Nebula proplyd LV 2 AB - We have obtained Hubble Space Telescope (HST) Space Telescope Imaging Spectrometer high-resolution spectra of the Orion proplyd LV 2 in the C III doublet at 1906.68 and 1908.73 Angstrom. New images at the 6 cm wavelength with MERLIN complement earlier HST images at a similar spatial resolution. This object is one of the closest proplyds to theta(1) Ori C, the source of the photoionizing and photoevaporating radiation. Combining the spectra with the HST images and detailed theoretical models has allowed a determination of the mass-loss rate as 8.2 x 10(-7) M. yr(-1) +/- 10%. This rate of mass loss is used to address the conundrum of the continued existence of proplyds. Even though they should be photoevaporated in only about 10(5) yr, there is no evidence for their destruction. It is concluded that the only explanation is that the age of theta(1) Ori C is less than 105 yr. These spectra and previously unpublished ground-based spectra in [O III] also show the presence of a monopolar microjet, redshifted by about 100 km s(-1) with respect to the systemic velocity. This jet is more visible in the 6 cm MERLIN images than in HST images, and this image together with the spectra are used to determine the flow parameters for the jet. Our spectra also include the stand-off shock that lies between LV 2 and theta(1) Ori C. This is the result of the high-velocity wind coming from the hot star theta(1) Ori C with the low-velocity wind coming from the proplyd. As expected, this shock is at rest with respect to the two objects MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173766700028 L2 - HII regions;ISM : clouds;ISM : individual (Orion nebula);stars : formation;CIRCUMSTELLAR DISKS; STAR-FORMATION; HIGH-SPEED; CLUSTER; RESOLUTION; OBJECTS; TRAPEZIUM; SYSTEM; PHOTOEVAPORATION; INTERFEROMETRY SO - Astrophysical Journal 2002 ;566(1):315-331 5665 UI - 11489 AU - Herbert TD AU - Schuffert JD AU - Andreasen D AU - Heusser L AU - Lyle M AU - Mix A AU - Ravelo AC AU - Stott LD AU - Heguera JC AD - Brown Univ, Dept Geol Sci, Providence, RI 02912, USAUniv Calif Santa Cruz, Santa Cruz, CA 95064, USALamont Doherty Earth Observ, Palisades, NY 10964, USABoise State Univ, Ctr Geophys Invest Shallow Subsurface, Boise, ID 83725, USAOregon State Univ, Corvallis, OR 97331, USAUniv So Calif, Los Angeles, CA 90089, USACtr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoHerbert, TD, Brown Univ, Dept Geol Sci, Providence, RI 02912, USA TI - The California Current, devils hole, and Pleistocene climate - Response MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000174858800002 L2 - TEMPERATURE SO - Science 2002 ;296(5565): 5666 UI - 10368 AU - Heredia-Tapia A AU - rredondo-Vega BO AU - Nunez-Vazquez EJ AU - Yasumoto T AU - Yasuda M AU - Ochoa JL AD - NW Ctr Biol Res SC, La Paz 23000, Baja Calif Sur, MexicoJapan Food Res Lab, Tama Lab, Tokyo 2060025, JapanOchoa, JL, NW Ctr Biol Res SC, POB 128,La Paz, La Paz 23000, Baja Calif Sur, Mexico TI - Isolation of Prorocentrum lima (Syn. Exuviaella lima) and diarrhetic shellfish poisoning (DSP) risk assessment in the Gulf of California, Mexico AB - A benthic toxic dinoflagellate identified as Prorocentrum lima (Syn. Exuviaella lima), and designated as strain PRL-1 was isolated from the coast of El Pardito (Coyote) Island in Baja California Sur, Mexico, after a fisherman poisoning incident involving consumption of liver from Lutjanus colorado, and Mycteroperca prionura fish. Purification and culturing was done in ES-Si medium, under 12:12 light/dark cycle (4 X 20 W cool-white fluorescent lamps), at 22 degreesC and constant stirring during 28 days. Whole cells were toxic to Artemia franciscana and its methanolic extract to mouse and to the marine yeast Debaryomyces hansenii. Chromatographic analysis (TLC and HPLC-MS) of such extract indicated an unusual proportion (1:2) okadaic acid (OA) and dinophysistoxin-1 (DTX-1). Estimated total toxin content by mouse bioassay (based on OA toxicity) was 19 pg/cell, a value significantly higher than that found by HPLC-MS (about 5.2 pg/cell, taking into account OA and DTX-1 only), suggesting that additional toxic components of unidentified nature are detected with the bioassay. This is the first report of a successful isolation and culturing of a toxic dinoflagellate from the Gulf of California, Mexico. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000177655500006 L2 - diarrhetic shellfish poisoning;dinoflagellate;Prorocentrum lima;okadaic acid;SCALLOP ARGOPECTEN-IRRADIANS; OKADAIC ACID; MARINE DINOFLAGELLATE; HERON-ISLAND; TOXINS; LOCATIONS; CIGUATERA; COAST; VARIABILITY; MORPHOLOGY SO - Toxicon 2002 ;40(8):1121-1127 5667 UI - 9811 AU - Heredia G AU - Arias RM AU - Reyes M AU - Castaneda-Ruiz C AD - Inst Ecol AC, Xalapa 91070, Veracruz, MexicoInst Invest Fundamentales Agr Trop Alejandro Humb, Havana 10800, CubaHeredia, G, Inst Ecol AC, Km 2-5,Carretera Antigua Xalapa Coatepec,Congrega, Xalapa 91070, Veracruz, Mexico TI - New anamorph fungi with rhombic conidia from Mexican tropical forest litter AB - Two anamorph fungi, collected on leaf litter from Mexico are proposed as new taxa. One of them, Beltraniella fertilis, is characterized by having branched conidiophores with fertile apices. The other species, Pseudobeltrania macrospora, is characterized by having much longer conidia than all known species of Pseudobeltrania. Descriptions and illustrations in situ are provided, as well as culture characteristics. A key to the species of the genus Pseudobeltrania is included MH - Cuba MH - Mexico|Veracruz PB - YUNNAN: FUNGAL DIVERSITY PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 1560-2745 UR - ISI:000179354500007 L2 - anamorphic fungi;hyphomycetes;litter fungi;Mexican mycobiota SO - Fungal Diversity 2002 ;11():99-107 5668 UI - 9458 AU - Hermes-Lima M AU - Zenteno-Savin T AD - Univ Brasilia, Oxyrad Res Grp, Dept Cellular Biol, BR-70910900 Brasilia, DF, BrazilCent Investigac Biol Noroeste SC, Acucultura & Biotecnol Marina, La Paz 23090, Baja Calif Sur, MexicoHermes-Lima, M, Univ Brasilia, Oxyrad Res Grp, Dept Cellular Biol, BR-70910900 Brasilia, DF, Brazil TI - Animal response to drastic changes in oxygen availability and physiological oxidative stress AB - Oxygen is essential for most life forms, but it is also inherently toxic due to its biotransformation into reactive oxygen species (ROS). In fact, the development of many animal and plant pathological conditions, as well as natural aging, is associated with excessive ROS production and/or decreased antioxidant capacity. However, a number of animal species are able to tolerate, under natural conditions, situations posing a large potential for oxidative stress. Situations range from anoxia in fish, frogs and turtles, to severe hypoxia in organs of freeze-tolerant snakes, frogs and insect larvae, or diving seals and turtles, and mild hypoxia in organs of dehydrated frogs and toads or estivating snails. All situations are reminiscent of ischemia/reperfusion events that are highly damaging to most mammals and birds. This article reviews the responses of anoxia/hypoxia-tolerant animals when subjected to environmental and metabolic stresses leading to oxygen limitation. Abrupt changes in metabolic rate in ground squirrels arousing from hibernation, as well as snails arousing from estivation, may also set up a condition of increased ROS formation. Comparing the responses from these diverse animals, certain patterns emerge. The most commonly observed response is an enhancement of the antioxidant defense. The increase in the baseline activity of key antioxidant enzymes, as well as 'secondary' enzymatic defenses, and/or glutathione levels in preparation for a putative oxidative stressful situation arising from tissue reoxygenation seem to be the preferred evolutionary adaptation. Increasing the overall antioxidant capacity during anoxia/hypoxia is of relevance for species such as garter snakes (Thamnophis sirtalis parietalis) and wood fogs (Rana sylvatica), while diving freshwater turtles (Trachemys scripta elegans) appear to rely mainly upon high constitutive activities of antioxidant enzymes to deal with oxidative stress arising during tissue reoxygetiation. The possibility that some animal species might control post-anoxic ROS generation cannot be excluded. (C) 2002 Elsevier Science Inc. All rights reserved MH - Brazil MH - Mexico|Baja California Sur PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 71 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism;Toxicology;Zoology U5 - J;Article AV - English IS - 1532-0456 UR - ISI:000180245100009 L2 - reactive oxygen species;antioxidants;ischemia;metabolic depression;anoxia tolerance;hypoxia;estivation;hibernation;diving;FRESH-WATER TURTLE; ANTIOXIDANT DEFENSES; LAND SNAILS; GLUTATHIONE-PEROXIDASE; DEHYDRATION TOLERANCE; HYPOXIA-REOXYGENATION; ISCHEMIA-REPERFUSION; METABOLIC DEPRESSION; LIPID-PEROXIDATION; HYDROGEN-PEROXIDE SO - Comparative Biochemistry and Physiology C-Toxicology & Pharmacology 2002 ;133(4):537-556 5669 UI - 8946 AU - Hernandez-Avila M AU - Peterson KE AU - Gonzalez-Cossio T AU - Sanin LH AU - Aro A AU - Schnaas L AU - Hu H AD - Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAUniv Autonoma Chihuahua, Chihuaha, MexicoHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAInst Nacl Perinatol, Dept Dev Neurobiol, Mexico City, DF, MexicoHernandez-Avila, M, Av Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca, Morelos, Mexico TI - Effect of maternal bone lead on length and head circumference of newborns and 1-month-old infants AB - The authors evaluated the effects that maternal bone lead stores have in anthropometry at birth in 223 mother-infant pairs. The participants were recruited between April and November 1994. Anthropometric data were collected within the first 12 hr following delivery. Maternal information was obtained 1 mo after delivery occurred. Bone lead burden was determined with in-vivo K-x-ray fluorescence of the tibia (cortical bone) and the patella (trabecular bone). The authors transformed anthropometric measurements to an ordinal 5-category scale, and the association of measurements with other factors was evaluated with ordinal logistic-regression models. Mean bone lead levels were 9.8 mug/gm bone mineral and 14.4 mug/gm bone mineral for the tibia and patella, respectively. Birth length of newborns decreased as tibia lead levels increased. Compared with women in the lower quintiles of the distribution of tibia lead, those in the upper quintile had a 79% increase in risk of having a lower birth length newborn (odds ratio = 1.79; 95% confidence interval = 1.10, 3.22). The authors adjusted by birth weight, and the effect was attenuated-but nonetheless significant. Patella lead was positively and significantly related to the risk of a low head circumference score; this score remained unaffected by inclusion of birth weight. The authors estimated the increased risk to be 1.02 per mug lead/gm bone mineral (95% confidence interval = 1.01, 1.04 per mug lead/gm bone mineral). Odds ratios did not vary substantially after the authors adjusted for birth weight and other important determinants of head circumference MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 15 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000181523000015 L2 - birth anthropometry;bone lead;pregnancy;reproductive outcomes;smoking;RAY-FLUORESCENCE MEASUREMENTS; BLOOD LEAD; DENSITY CHANGES; PREGNANCY; EXPOSURE; GROWTH; LACTATION; STATURE; MOBILIZATION; CHILDREN SO - Archives of Environmental Health 2002 ;57(5):482-488 5670 UI - 10592 AU - Hernandez-Avila M AU - Tellez-Rojo MM AU - Hernandez-Cadena L AU - Smith D AU - Schwartz J AU - Hu H AD - Ct Populat Hlth Res, Natl Publ Hlth Inst, Cuernavaca, Morelos, MexicoUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Cambridge, MA 02138, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USA TI - Controlled trial in pregnancy of calcium supplements for the supression of bone resorption and mobilization of lead into plasma MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600869 SO - Epidemiology 2002 ;13(4):S249-S249 5671 UI - 10414 AU - Hernandez-Beltran F AU - Quintana-Solorzano R AU - Sanchez-Valente J AU - Pedraza-Archila F AU - Figueras F AD - Inst Mexicano Petr, Programa Tratamiento Crudo Maya, Mexico City 07730, DF, MexicoInst Rech Catalyse, Villeurbanne, France TI - Effect of highly reactive sulfur species on sulfur reduction in cracking gasoline MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000177422301458 SO - Abstracts of Papers of the American Chemical Society 2002 ;224():U274-U274 5672 UI - 9163 AU - Hernandez-Carmona G AU - Mchugh DJ AU - rvizu-Higuera DL AU - Rodriguez-Montesinos YE AD - Interdisciplinario Ciencias Marinas, La Paz, BCS, MexicoUniv New S Wales, Sch Chem, Univ Coll, Australian Def Force Acad, Canberra, ACT 2600, AustraliaHernandez-Carmona, G, Interdisciplinario Ciencias Marinas, Ap Postal 592, La Paz, BCS, Mexico TI - Pilot plant scale extraction of alginates from Macrocystis pyrifera 4. Conversion of alginic acid to sodium alginate, drying and milling AB - The last three steps of the alginate production process were studied: conversion of alginic acid to sodium alginate, drying, and milling. Three methods were used to follow the conversion reaction: measuring the pH (a) in the ethanol-water liquid of the reaction mixture, (b) after dissolving a sample of the fiber taken from the reaction mixture, (c) after dissolving the dried sodium alginate obtained from the reaction. To obtain a neutral dried sodium alginate, in the first method the pH should be adjusted to 9, and in the second the pH should be adjusted to 8. The best method to control the reaction was to dissolve a sample of the fiber and adjust the pH to 8. The best proportion to reach the critical point, where pH just begins to rise, was 0.25 parts of sodium carbonate to 1 part of alginate in the initial dry algae. A pH above 7 may produce a break down of the molecule, reducing significantly the viscosity of the final alginate. Four different temperatures were used to dry the alginate: 50, 60, 70, and 80 degreesC. Drying time to reach 12% moisture ranged from 1.5 h at 80 degreesC to 3 h at 50 degreesC. The best drying temperature was 60 degreesC for 2.5 h. The effect of drying temperature on alginate viscosity was dependent on the alginate type. Low and medium viscosity alginates were not significantly affected, but alginate with high viscosity was reduced by 40 to 54% using the temperature range of 60 to 80 degreesC. A fixed hammer mill was used to reduce the particle size of the dried sodium alginate. Particle size measurements showed that after a first milling the product contained 76% large particles (20-60 mesh) and 24% fine particles (80-120 mesh). After a third milling the product still contained 42.9% large particles. No significant effect was found on alginate viscosity because of the milling steps MH - Australia MH - Mexico|Baja California Sur PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0921-8971 UR - ISI:000181010700002 L2 - alginate;alginic acid;conversion;drying;Macrocystis pyrifera;milling;pilot plant process;sodium alginate SO - Journal of Applied Phycology 2002 ;14(6):445-451 5673 UI - 10261 AU - Hernandez-Cobos J AU - Vega LF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Rovira & Virgili, Dept Engn Quim, Escola Tecn Super Engn Quim, Tarragona 43007, SpainHernandez-Cobos, J, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - The influence of the density in the hydrophobic hydration of methane in supercritical water AB - We present a molecular simulation study for the hydrophobic hydration of methane as a function of density, at supercritical temperature. Thermodynamics and structural properties of methane in water for a wide range of densities of water, at a given temperature are presented here. In order to check the influence of the molecular model on these properties, two different intermolecular potentials are used, a semiempirical, well-known model for water, the TIP4P model, and an ab-initio based, polarizable model, the MCHO potential. Both models predict the same qualitative behavior at all conditions studied. The main results obtained from this work are that while the free energy is a strong function of the water density, the water-water structure remains almost unaltered, from medium to high density of water. The strong dependency of the free energy on density is then attributed to changes in entropy, reflected in the water-methane correlation functions. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0167-7322 UR - ISI:000178067200011 L2 - VAPOR COEXISTENCE CURVE; MOLECULAR SIMULATION; COMPUTER-SIMULATION; LIQUID; 25-DEGREES-C; TEMPERATURE; EQUILIBRIA; MODEL SO - Journal of Molecular Liquids 2002 ;101(1-3):113-125 5674 UI - 11695 AU - Hernandez-Contreras H AU - Contreras-Puente G AU - guilar-Hernandez J AU - Morales-Acevedo A AU - Vidal-Larramendi J AU - Vigil-Galan O AD - UPALM, Escuela Super Fis & Matemat, Inst Politecn Nacl, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Ingn Elect, Mexico City, DF, MexicoUniv La Habana, IMRE, Fac Fis, Havana 10400, CubaHernandez-Contreras, H, UPALM, Escuela Super Fis & Matemat, Inst Politecn Nacl, Edificio 9, Mexico City 07738, DF, Mexico TI - US and CdTe large area thin films processed by radio-frequency planar-magnetron sputtering AB - We present in this work the processing of large area US and CdTe thin films. We have been working for this purpose with a Radio-Frequency Planar Magnetron Sputtering (RF-PMS) system with two 6-inch balanced guns, processing thin films in areas as large as 450 cm(-2) grown on soda-lime glasses. Conducting glasses (SnO2 of 7 Omega/square) were also used only for CdS deposition in order to further analyze the heterojunction CdS/CdTe. The best films have been processed with substrate temperatures (T-s) of 250degreesC for US and 215degreesC for CdTe, Ar chamber-pressure of 20 mtorr, radio frequency power of 300 W, and different deposition time between target materials. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000174053800031 L2 - CdS;CdTe;radio-frequency planar-magnetron sputtering;X-rays;photoluminescence resistivity;optical absorbtion SO - Thin Solid Films 2002 ;403():148-152 5675 UI - 12093 AU - Hernandez-Cordero J AU - Kozlov VA AU - Morse TF AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoBoston Univ, Lab Lightware Technol, Dept Elect & Comp Engn, Photon Ctr, Boston, MA 02215, USAHernandez-Cordero, J, Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Highly accurate method for single-mode fiber laser wavelength measurement AB - We propose a simple technique by which the wavelength of a single-mode fiber laser can be easily measured to accuracy of the order of 1 pm. The technique is based on the wavelength dependence of polarization mode beating frequencies. Direct application of this method for wavelength stabilization of fiber lasers and the possibility of obtaining information about the polarization mode dispersion of the fiber used within the laser cavity are discussed MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000172994500028 L2 - laser tuning;optical fiber devices;optical fiber lasers;optical fiber polarization;wavelength measurement;POLARIZATION; BIREFRINGENCE; SENSORS SO - Ieee Photonics Technology Letters 2002 ;14(1):83-85 5676 UI - 9338 AU - Hernandez-Cordero S AU - Rivera J AU - Villalpando S AU - Gonzalez-Cossio T AU - Neufeld L AU - Ramakrishnan U AU - Martorell R AD - Inst Nacl Salud Publ, Cuernavaca, Morelos, MexicoInst Mexicano Seguro Social, Mexico City, DF, MexicoEmory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA, USA TI - Effects of multiple micronutrient supplementation during pregnancy on breast milk retinol concentration at one month postpartum MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 0 U4 - Nutrition & Dietetics U5 - J;Meeting Abstract AV - English IS - 0022-3166 UR - ISI:000178033300089 SO - Journal of Nutrition 2002 ;132(9):2978S-2978S 5677 UI - 10227 AU - Hernandez-Eugenio G AU - Fardeau ML AU - Cayol JLA AU - Patel BKC AU - Thomas P AU - Macarie H AU - Garcia JL AU - Ollivier B AD - Univ Provence & Mediterranee, ESIL, IFR BAIM, UR Extremophiles,IRD, F-13288 Marseille 09, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoGriffith Univ, Sch Biomol & Biomed Sci, Brisbane, Qld 4111, AustraliaMission IRD, Mexico City, DF, MexicoOllivier, B, Univ Provence & Mediterranee, ESIL, IFR BAIM, UR Extremophiles,IRD, F-13288 Marseille 09, France TI - Clostridium thiosulfatireducens sp nov., a proteolytic, thiosulfate- and sulfur-reducing bacterium isolated from an upflow anaerobic sludge blanket (UASB) reactor AB - A strictly anaerobic, Gram-positive, sporulating rod (0.5-0.6 x 2.0-4.0 mum), designated strain Lup 21(T), was isolated from an upflow anaerobic sludge blanket (UASB) reactor treating cheese-factory wastewater. Strain Lup 21(T) was motile by means of peritrichous flagella, had a G+C content of 31.4 mol % and grew optimally at 37 degreesC, pH 7.4, in the absence of NaCl. It is a heterotrophic micro-organism, utilizing proteinaceous compounds (gelatin, peptides, Casamino acids and various single amino acids) but unable to use any of the carbohydrates tested as a carbon and energy source. It reduced thiosulfate and elemental sulfur to sulfide in the presence of Casamino acids as carbon and energy sources. Acetate, butyrate, isobutyrate, isovalerate, CO2 and sulfide were end products from oxidation of gelatin and Casamino acids in the presence of thiosulfate as an electron acceptor. In the absence of thiosulfate, serine, lysine, methionine and histidine were fermented. On the basis of 16S rRNA similarity, strain Lup 21(T) was related to members of the low-G+C Clostridiales group, Clostridium subterminale DSM 6970(T) being the closest relative (with a sequence similarity of 99.4%). DNA-DNA hybridization was 56% with this species. On the basis of phenotypic, genotypic and phylogenetic characteristics, the isolate was designated as a novel species of the genus Clostridium, Clostridium thiosulfatireducens sp. nov. The type strain is strain Lup 21(T) (= DSM 13105(T) = CIP 106908(T)) MH - Australia MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000178117500004 L2 - Clostridium thiosulfatireducens;thiosulfate reduction;sulfur reduction;taxonomy;anaerobe;OIL-PRODUCING WELL; WASTE-WATER TREATMENT; GREAT-ARTESIAN-BASIN; THERMOANAEROBACTER-BROCKII; GEN-NOV; THERMOPHILIC BACTERIUM; EMENDED DESCRIPTION; RENATURATION RATES; DNA HYBRIDIZATION; ELEMENTAL SULFUR SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():1461-1468 5678 UI - 10639 AU - Hernandez-Eugenio G AU - Fardeau ML AU - Cayol JC AU - Patel BKC AU - Thomas P AU - Macarie H AU - Garcia JL AU - Ollivier B AD - Univ Aix Marseille 1, BAIM, IFR, IRD,UR 101 Extremophiles, F-13288 Marseille, FranceUniv Mediterranee, BAIM, IFR, IRD,UR 101 Extremophiles, F-13288 Marseille, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoGriffith Univ, Sch Biomol Biomed Sci, Brisbane, Qld 4111, AustraliaMission IRD, Mexico City, DF, MexicoOllivier, B, Univ Aix Marseille 1, BAIM, IFR, IRD,UR 101 Extremophiles, ESIL Case 925,163 Ave Luminy, F-13288 Marseille, France TI - Sporanaerobacter acetigenes gen. nov., sp nov., a novel acetogenic, facultatively sulfur-reducing bacterium AB - A strictly anaerobic, moderately thermophilic, sporulating rod, designated strain Lup 33(T), was isolated from an upflow anaerobic sludge blanket (UASB) reactor in Mexico. Strain Lup 33(T) possessed a few laterally inserted flagella, had a DNA G+C content of 32.2 mol% and grew optimally at pH 7.4 and 40 degreesC. Growth was observed at temperatures of up to 50 degreesC and was inhibited in the presence of 5% NaCl. Strain Lup 33(T) is heterotrophic and utilized some sugars, peptides and various single amino acids. Gelatin and casein were not used as energy sources. It performed the Stickland reaction and reduced elemental sulfur to sulfide. Acetate was the only fatty acid detected from glucose fermentation, whereas acetate together with isobutyrate and isovalerate were found as end products from peptone fermentation. Phylogenetically, strain Lup 33(T) branched with members of cluster XII of the order Clostridiales, with Clostridium hastiforme as the closest relative (similarity of 93%). On the basis of the phenotypic, genotypic and phylogenetic characteristics of the isolate, it is proposed as a novel species of a new genus, Sporanaerobacter acetigenes gen. nov., sp. nov. The type strain is strain Lup 33(T) (= DSM 13106(T) = CIP 106730(T)) MH - Australia MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000176925200021 L2 - Sporanaerobacter acetigenes;acetogenic;sulfur reduction;taxonomy;phylogeny;GREAT-ARTESIAN-BASIN; OIL-PRODUCING WELL; CLOSTRIDIUM-THERMOSULFUROGENES; THERMOANAEROBACTER-BROCKII; PHYLOGENETIC ANALYSIS; THIOSULFATE; RECLASSIFICATION; AUSTRALIA; SEDIMENTS; OXIDATION SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():1217-1223 5679 UI - 9975 AU - Hernandez-Gallegos O AU - Roberto F AU - La Cruz MD AU - Cruz MVS AU - Andrews RM AD - Virginia Polytech Inst & State Univ, Dept Biol, Blacksburg, VA 24061, USANatl Autonomous Univ Mexico, Inst Biol, Dept Zool, Lab Herpetol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Lab Biol Reprod Anim, Mexico City 04510, DF, MexicoAndrews, RM, Virginia Polytech Inst & State Univ, Dept Biol, Blacksburg, VA 24061 USA TI - Continuous spermatogenesis in the lizard Sceloporus bicanthalis (Sauria : Phrynosomatidae) from high elevation habitat of Central Mexico AB - Sceloporus bicanthalis is a viviparons lizard that inhabits high altitude temperate zone habitats in Mexico. Our histological observations indicate that adult males exhibit spermatogenesis and spermiogenesis throughout the year; no seasonal differences were found in testes mass, height of epididymal epithelial cells, and number of layers of spermatogonia, primary and secondary spermatocytes, and spermatids. Seminiferous tubules exhibited slight, but statistically significant, seasonal variation in diameter. Continuous spermatogenesis and spermiogenesis of S. bicanthalis differ from the cyclical pattern exhibited by most species of lizards and from lizard species sympatric with S. bicanthalis. Continuous reproductive activity of males of S. bicanthalis, and maturation at a relatively small size, is associated with a female reproductive activity in which vitellogenic or pregnant females are present in the population during all months of the year. As a consequence, males can encounter potential mates as soon as they mature MH - Mexico|Distrito Federal MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000178924400003 L2 - reproductive cycle;Sceloporus bicanthalis;spermatogenesis;viviparity;REPRODUCTIVE-CYCLE; GENUS SCELOPORUS; EUMECES-COPEI; LIFE-HISTORY; VIVIPARITY; EVOLUTION; BIOLOGY; ECOLOGY; SIZE SO - Herpetologica 2002 ;58(4):415-421 5680 UI - 7770 AU - Hernandez-Hernandez R AU - Alcocer L AU - Velasco M AU - Reyes AJ AD - Univ Centro Occidentale, Barquisimeto, VenezuelaGen Hosp, Mexico City, DF, MexicoUniv Cent, Caracas, VenezuelaInst Cardiovasc Theory, Montevideo, Uruguay TI - Rate of change of blood pressure over the first weeks after the start of antihypertensive monotherapy with two calcium antagonists MH - Mexico|Distrito Federal MH - Uruguay MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0263-6352 UR - ISI:000178386300776 SO - Journal of Hypertension 2002 ;20():S167-S167 5681 UI - 11290 AU - Hernandez-Lamoneda R AU - Salazar MR AU - Pack RT AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUnion Univ, Dept Chem, Jackson, TN 38305, USALos Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USAHernandez-Lamoneda, R, CSIC, Inst Matemat & Fis Fundamentale, C Serrano 123, E-28006 Madrid, Spain TI - Does ozone have a barrier to dissociation and recombination? AB - The barrier associated with the dissociation and recombination of ozone has been calculated using highly correlated ab initio methods, Our calculations show that. for fixed equilibrium values of the bending angle and one bond distance. there is a very small barrier. 100 cm(-1). as opposed to much larger values previously reported. When the saddle point geometry is optimized, the reaction path still contains a barrier but the top of the barrier lies below the dissociation limit. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000175310400014 L2 - POTENTIAL-ENERGY SURFACES; 2ND-ORDER PERTURBATION-THEORY; SIZE-EXTENSIVE MODIFICATION; VIBRATIONAL FREQUENCIES; GROUND-STATE; SPECTROSCOPY; EXCITATIONS; TEMPERATURE; DEPENDENCE; RESONANCE SO - Chemical Physics Letters 2002 ;355(5-6):478-482 5682 UI - 10069 AU - Hernandez-Lucas I AU - Mavingui P AU - Finan T AU - Chain P AU - Martinez-Romero E AD - Univ Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoMcMaster Univ, Hamilton, ON, CanadaUniv Lyon 1, F-69622 Villeurbanne, FranceHernandez-Lucas, I, Univ Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Apdo Postal 565-A, Cuernavaca 62191, Morelos, Mexico TI - In vivo cloning strategy for Rhizobium plasmids AB - We have developed a simple system to clone indigenous Rhizobium plasmids into E. coli. The strategy consists of three matings: the first is to insert TO in the plasmid to be cloned, the second incorporates the integrative vector into the inserted Tn5 in the native Rhizobium plasmid, and the last mating transfers the target plasmid directly into E. coli . This mating-based system was successfully used to clone plasmids of Rhizobium species with sizes ranging from 150 to 270 kb. In addition, a 500-kb fragment of a 600-kb megaplasmid was also cloned. This. strategy could be used for cloning indigenous replicons of other Gram-negative bacteria into a different host MH - Canada MH - France MH - Mexico|Morelos PB - NATICK: EATON PUBLISHING CO RP - NOT IN FILE U3 - TC 0 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0736-6205 UR - ISI:000178641900012 L2 - PHASEOLUS-VULGARIS; TROPICI; NODULATION; LEGUMINOSARUM; MELILOTI; AGROBACTERIUM; SEQUENCES; STRAINS; ORIGIN; GENE SO - Biotechniques 2002 ;33(4):782-+ 5683 UI - 10854 AU - Hernandez-Ortiz V AU - Manrique-Saide P AU - fin-Gonzalez H AU - Novelo-Rincon L AD - Inst Ecol, AC Dept Entomol, Xalapa 91000, Veracruz, MexicoUADY, Fac Med Vet & Zootecn, Dept Zool, Merida, Yucatan, VenezuelaHernandez-Ortiz, V, Inst Ecol, AC Dept Entomol, Km 2-5 Antigua Carretera Coatepec,Apdo Postal 63, Xalapa 91000, Veracruz, Mexico TI - First report of Anastrepha compressa in Mexico and new records for other Anastrepha species in the Yucatan Peninsula (Diptera : Tephritidae) MH - Mexico|Veracruz MH - Venezuela PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000176498700019 SO - Florida Entomologist 2002 ;85(2):389-391 5684 UI - 10372 AU - Hernandez AD AU - Hart C AU - Escudero R AU - Ares O AD - Univ La Habana, IMRE, Lab Superconductividad, Havana 10400, CubaCtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUNAM, Inst Invest Mat, Lab Bajas Temp, Mexico City, DF, MexicoHernandez, AD, Univ La Habana, IMRE, Lab Superconductividad, San Lazaro & L, Havana 10400, Cuba TI - Fitting of transport measurements in polycrystalline La2/3Ca1/3MnO3 AB - Using a previous qualitative explanation to describe the transport properties of polycrystalline La2/3Ca1/3MnO3 thick films, we achieved a good fit of the temperature dependence of the resistance R(T). Depending oil the sample, we have observed different metal-insulator (MI) transitions while the magnetic behavior is always similar. Small regions of depleted T-c adjacent to the grain boundary could have an important resistance contribution without affecting the magnetic properties in an appreciable manner. In this work, we achieve a quantitative explanation for the different transport behaviors that we have observed experimentally. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000177607700018 L2 - manganites;metal-insulator transition;extrinsic magnetoresistance;MAGNETORESISTANCE; FILMS SO - Physica B-Condensed Matter 2002 ;320(1-4):64-66 5685 UI - 11627 AU - Hernandez EP AU - Beier E AU - Lavin MF AU - Ripa P AD - CICESE, Dept Oceanog Fis, Ensenada, Baja California, MexicoOregon State Univ, Coll Oceanog & Atmospher Sci, Corvallis, OR 97331, USALavin, MF, CICESE Oceanog, POB 434844, San Diego, CA 92143, USA TI - The effect of the seasonal variation of stratification on the circulation of the northern Gulf of California AB - Direct current measurements reveal that the circulation of the northern Gulf of California in the annual timescale consists of a cyclonic basinwide gyre (similar to0.35 m s(-1)) that lasts from June to September (4 months), and an anticyclonic gyre (similar to0.35 m s(-1)) lasting from November to April (6 months). The transitions between regimes take about three weeks each. The hypothesis that the difference in duration of the two circulation regimes is due to the seasonal variation of stratification of the water column is explored by simulations with a nonlinear two-layer numerical model of circulation and thermodynamics that includes vertical mixing, parameterized as an entrainment velocity. The model results agree remarkably well with the observations, considering its simplified vertical structure. In addition, the model predicts a net circulation consisting of an anticyclonic gyre of similar to0.05 m s(-1), with a corresponding average concavity of the interface, and a two-layer exchange through the main channels of the archipelago MH - Mexico|Baja California MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Oceanography U5 - J;Article AV - English IS - 0022-3670 UR - ISI:000174278600001 L2 - OF-CALIFORNIA; HEAT-BALANCE; VARIABILITY; OCEAN SO - Journal of Physical Oceanography 2002 ;32(3):705-728 5686 UI - 10234 AU - Hernandez H AU - Serafin N AU - Terrazas AM AU - Marnet PG AU - Kann G AU - Delgadillo JA AU - Poindron P AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, Qro, MexicoINRA, ENSAR Rech Prod Lait, Unite Mixte INRA, F-35042 Rennes, FranceINRA, Unite Rech Endocrinol Placenta & Perinatalite, Biol Cellulaire & Mol Lab, F-78352 Jouy En Josas, FranceUniv Autonoma Agraria Antonio Narro, Dept Ciencias Med Vet, Carretera Santa Fe & Periferico, Torreon Coahuila, MexicoPoindron, P, INRA, UMR Physiol Reprod & Comportements 6073, F-37380 Nouzilly, France TI - Maternal olfaction differentially modulates oxytocin and prolactin release during suckling in goats AB - In postparturient goats, olfactory recognition of the young allows the establishment of a selective bond between the mother and her kids. Once this bond is formed, the mother rejects alien young that attempt to suckle. We tested whether the development of the maternal selective bond in goats modulates prolactin (PRL) and oxytocin (OT) release in response to suckling. On day 37 of lactation, serial blood samples were taken during nursing of the mother's own or alien kid(s) in 10 intact/selective goats and in 10 goats rendered anosmic/nonselective through prepartum peripheral ZnSO4 irrigation. Spontaneous nursing behavior was also studied weekly from day 7 to 30 of lactation, at which time milk production was measured. Maternal selectivity had no effect on PRL release, in contrast to OT release, which was significantly affected by this factor. Intact mothers released OT only when nursing their own kids, but not with aliens, while anosmic/nonselective dams showed an increase in OT levels regardless of the identity of the kids. In addition to these effects on maternal selectivity, the amplitude of the response of both hormones was lower in anosmic mothers than in intact mothers. Finally, nursing behavior and milk production were not significantly affected by anosmia. We conclude that maternal selective behavior in goats, which relies on the individual olfactory signature of the kid, modulates the OT, but not the PRL, response to suckling. In addition, perception of the smell of the young appears to have a general facilitatory effect, independent of the kid's identity, on the release of both hormones. (C) 2002 Elsevier Science (USA) MH - France MH - Mexico|Queretaro MH - Mexico|Coahuila PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Behavioral Sciences;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0018-506X UR - ISI:000178049800014 L2 - goat;maternal behavior;suckling;prolactin;oxytocin;olfaction;anosmia;selectivity;lactation;SUPRAOPTIC NUCLEUS AFFERENTS; PERIPHERALLY INDUCED ANOSMIA; BETA-ENDORPHIN; VAGINOCERVICAL STIMULATION; LUTEINIZING-HORMONE; PLASMA PROLACTIN; ULTRASONIC CRIES; MILK EJECTION; SHEEP; BULB SO - Hormones and Behavior 2002 ;42(2):232-244 5687 UI - 10010 AU - Hernandez L AU - Parmenter RR AU - Dewitt JW AU - Lightfoot DC AU - Laundre JW AD - AC Ctr Reg Chihuahua, Inst Ecol, Aldama 32900, Chih, MexicoUniv New Mexico, Dept Biol, Albuquerque, NM 87131, USAHernandez, L, AC Ctr Reg Chihuahua, Inst Ecol, AP 28, Aldama 32900, Chih, Mexico TI - Coyote diets in the Chihuahuan Desert, more evidence for optimal foraging AB - With 7 years data on coyote prey use and availability, we tested three predictions based on optimal foraging: (1) the proportion eaten of the most profitable item is constant regardless of availability, (2) under a constant density of higher ranked prey, there is no relationship between the proportion eaten of low profitability items and their density, (3) the ratio of number consumed to availability for the highest ranking prey item should be negatively related to availability. We tested these predictions with regression analyses. We found no significant linear relationship between lagomorph availability and use. There was no significant linear relationship between percent frequency of occurrence of rodents nor arthropods and their respective availabilities for two levels of availability of lagomorphs. We found a significant negative relationship between number consumed/number available to availability for lagomorphs but not for rodents nor arthropods. The results supported the three predictions and we concluded that coyotes are foraging optimally. (C) 2002 Elsevier Science Ltd MH - Mexico|Chihuahua MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000178755000010 L2 - Chihuahuan Desert;optimal foraging theory;coyote;Canis latrans;long term study;RODENT COMMUNITY; POPULATIONS; PREDATION; DENSITY; ECOLOGY SO - Journal of Arid Environments 2002 ;51(4):613-624 5688 UI - 10290 AU - Hernandez M AU - Buckle LF AU - Espina S AD - Ctr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Ensenada 22860, Baja California, MexicoUniv Nacl Autonoma Mexico, Lab Ecofisiol, Dept Biol, Fac Ciencias, Mexico City 04510, DF, MexicoBuckle, LF, Dept Aquaculture, POB 434844, San Diego, CA 92143, USA TI - Temperature preference and acclimation in Poecilia sphenops (Pisces, Poeciliidae) AB - The preferred temperature (PT) of Poecilia sphenops (Pisces, Poeciliidae) (n = 240; 1.13 +/- 0.06 g wet weight; 3.26 +/- 0.88 cm standard length) from Presa Piedra Azul, Oaxaca, Mexico, was measured at acclimation temperature of 20 degreesC, 23 degreesC, 26 degreesC, 29 degreesC, 32 degreesC and 35 degreesC. The thermal preference of males was 25.5 degreesC in summer and 29.6 degreesC in winter; whereas females preferred 29 degreesC in both seasons. Fish held at 20 degreesC and 23 degreesC preferred temperatures 36% higher than their acclimation temperature (AT), and those held at 35 degreesC and 32 degreesC preferred 30% and 20% lower temperatures than their AT. In intermediate temperatures, no significant differences between PT and AT were found. The interval of thermal selection based on the higher (HAT) and lower (LAT) avoidance temperatures was of 10-14 degreesC and not different between sexes in both seasons. Knowledge of the thermal biology of P. sphenops based on the preferred and avoidance temperatures was very important in order to understand the capacity of the species to adapt to the thermal changes occurring in its habitat. Based on the results, we can recommend the use of P. sphenops in aquaculture owing to its thermal plasticity MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000178005800004 L2 - preferred and avoided temperature;Poecilia sphenops (Pisces, Poeciliidae);GAMBUSIA-AFFINIS; FISH; TOLERANCE; MOSQUITOFISH SO - Aquaculture Research 2002 ;33(12):933-940 5689 UI - 10084 AU - Hernandez MP AU - Pena JL AU - Alonso CF AU - Bartolo-Perez P AU - Farias MH AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Altamira 89600, Tamps, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaIPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Merida 97310, Yuc, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoUniv La Habana, Inst Mat & Reactivos, Havana 10400, CubaHernandez, MP, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Km 14-5,Carretera Tampico Puerto Ind Altamira, Altamira 89600, Tamps, Mexico TI - AlGe alloy composition calculated by Auger electron spectroscopy AB - The Al and Ge molar fraction of a few surface atomic layers in AlGe binary alloys was calculated using Auger electron spectroscopy (AES) and the evaluation of the Auger electron matrix factor or the matrix correction. The electron backscattering correction factor (R) and the inelastic mean path (IMFP) were taken into account to calculate the matrix correction. The IMFP was obtained from experimental optical data and elastic peak electron spectroscopy (EPES) measurements. The electron backscattering correction factor was calculated using Monte Carlo simulations. The main sources of the uncertainty of the Al and Ge molar fraction of a few surface atomic layers in AlGe binary alloys is the uncertainty of Al IMFP MH - Cuba MH - Mexico|Baja California MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400020 L2 - MEAN FREE PATHS; BACKSCATTERING CORRECTION; SURFACES; SOLIDS; MODEL SO - Surface Review and Letters 2002 ;9(5-6):1709-1713 5690 UI - 10127 AU - Hernandez R AU - Guerrero FD AU - George JE AU - Wagner GG AD - USDA ARS, Knipling Bushland US Livestock Insects Res La, Kerrville, TX 78028, USASAGARPA, INIFAP, Cenid Parasitol Vet, Morelia 62500, Michoacan, MexicoTexas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843, USAGuerrero, FD, USDA ARS, Knipling Bushland US Livestock Insects Res La, 2700 Fredericksburg Rd, Kerrville, TX 78028 USA TI - Allele frequency and gene expression of a putative carboxylesterase-encoding gene in a pyrethroid resistant strain of the tick Boophilus microplus AB - We utilized RNA Northern blot analysis and ribonuclease protection assays (RPA) to study the mRNA expression level of a putative carboxylesterase-encoding gene from several strains of Boophilus microplus (Canestrini). Both the Northern analysis and RPAs indicated that an esterase transcript was more abundant in the pyrethroid resistant strain, Coatzacoalcos (Cz), compared to a susceptible control strain and a resistant strain whose pyrethroid resistance is mediated through a target site insensitivity mechanism. A PCR-based assay was designed to identify the presence of a previously reported point mutation in this B. microplus esterase gene. The reported G-A substitution at nucleotide 1120 creates an EcoR I site in the mutant allele which can be detected by EcoR I digestion of the amplification products. The PCR assays showed that the frequency of the mutant allele was highest in the Cz-resistant strain, which has been shown to have an esterase-mediated resistance mechanism. The PCR assay can be performed either on individual tick larvae or hemolymph from adults. Published by Elsevier Science Ltd MH - Mexico|Michoacan MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0965-1748 UR - ISI:000178361300007 L2 - Boophilus microplus;pyrethroid resistance;mRNA expression;specific allele detection;polymerase chain reaction;SOUTHERN CATTLE TICK; INSECTICIDE RESISTANCE; LUCILIA-CUPRINA; POINT MUTATION; ESTERASE; IXODIDAE; ACARI; IDENTIFICATION; BIOCHEMISTRY; LEPIDOPTERA SO - Insect Biochemistry and Molecular Biology 2002 ;32(9):1009-1016 5691 UI - 12031 AU - Hernandez RM AU - Buckle RLF AD - Ctr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Tijuana Ensenada 22860, Baja California, MexicoBuckle, RLF, CICESE, Dept Aquaculture, POB 434844, San Diego, CA 92143 USA TI - Temperature tolerance polygon of Poecilia sphenops Valenciennes (Pisces : Poeciliidae) AB - 1. The critical thermal maximum (CTMax) and minimum (CTMin), the upper and lower incipient lethal temperature, and the high and low avoidance temperature of Poecilia sphenops were established. 2. The area of thermal tolerance of P. sphenops upon considering the lethal limits was 863.9 (degreesC)(2), the estimated area using the critical temperatures, as well as the zone of thermal preference were 959 and 323.4 (degreesC)(2), respectively. 3. P. sphenops is a species highly eurythermical that possesses a high tolerance, resistance and capacity of adaptation to environmental variations. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biology;Zoology U5 - J;Article AV - English IS - 0306-4565 UR - ISI:000173098400001 L2 - thermal tolerance;incipient lethal temperature;critical thermal maximum and minimum;avoided temperatures polygon;CRITICAL THERMAL LIMITS; NORTH-WEST ENGLAND; 3 POPULATIONS; SALMON SO - Journal of Thermal Biology 2002 ;27(1):1-5 5692 UI - 11021 AU - Hernandez S AU - Ogawa T AU - Watanabe T AU - Miyata S AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoTokyo Univ Agr & Technol, Grad Sch Bioengn & Syst Engn, Tokyo, JapanHernandez, S, Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Novel diacetylene- and chromophore-containing polymers and their second order nonlinear optical properties AB - Several new polymers, which contain diacetylene groups in the main chains and polar chromophores in the side chains were synthesized and characterized. The polymers gave films with excellent optical quality by spin coating or casting due to their amorphous nature. The SHG measurements showed that the main chains have very important role to determine the second order nonlinear properties. For example the polymers having para benzoates chains had much higher SHG values than meta benzoate chains and pentynoic chains. Some of these polymers demonstrated very,high SHG values, and this is probably because their extremely high order parameters, which is around 0.5 - 0.6 MH - Japan MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 10 U4 - Crystallography U5 - J;Article AV - English IS - 1058-725X UR - ISI:000175887000077 L2 - diacetylenic groups;polar dyes;second order nonlinear optics;high orientation parameter;2ND-ORDER SO - Molecular Crystals and Liquid Crystals 2002 ;374():503-512 5693 UI - 10265 AU - Herrera-Acosta J AU - Tapia E AU - Sanchez-Lozada LG AU - Franco M AU - Striker LJ AU - Striker GE AU - Iturbe BR AD - Inst Nacl Cardiol Ignacio Chavez, Dept Nefrol, Mexico City, DF, MexicoUniv Miami, Sch Med, Dept Med, Div Nephrol,Lab Renal Cell Biol, Miami, FL 33152, USAUniv Hosp, Renal Serv & Lab, Maracaibo, VenezuelaInst Invest Biomed, Maracaibo, VenezuelaHerrera-Acosta, J, Inst Nacl Cardiol Ignacio Chavez, Dept Nefrol, Juan badiano 1,Tlapan 1,DF 4080-1408, Mexico City, DF, Mexico TI - Restoration of glomerular haemodynamics and renal injury independent of arterial hypertension in rats with subtotal renal ablation AB - To study whether prevention of renal injury using the anti-inflammatory drugs pentosan polysulphate (PPS) and mycophenolate mofetil (MMF) is associated with improvement of glomerular haemodynamics, PPS and MMF were compared with losartan. The awake systolic blood pressure (SBP), proteinuria (Uprot) and micropuncture studies were performed 30 days after five-sixths nephrectomy in untreated rats and in rats treated with PPS (100 mg/kg per day), MMF (30 mg/kg per day) or losartan (30 mg/kg per day). In the rats receiving no treatment there was a rise in SBP (to 180-200 mmHg) and in Uprot, which were prevented by losartan. In the PPS and MMF groups, the SBP was elevated but the Uprot did not increase. In the untreated rats the total glomerular filtration rate (GFR) decreased (-80%) and the single-nephron GFR (37-42%), plasma flow (67-127%) and glomerular pressure (10-15 mmHg) increased. These changes were prevented by PIPS and MMF to the same extent as by losartan:the rise in single-nephron GFR and plasma flow were reduced by 50% and the glomerular pressure was normal. In rats receiving losartan, this was due to the fall in arterial pressure, whereas in PPS- and MMF-treated rats it was due to a rise in afferent resistance, indicating autoregulatory capacity. Total GFR was similar, despite the lower single-nephron GFR in treated groups, suggesting a larger proportion of functioning nephrons. Losartan, PIPS and MMF significantly reduced glomerular sclerosis and tubular dilation and atrophy in association with a reduction in the lymphocyte and macrophage infiltrate. These results suggest an interaction between the haemodynamic and inflammatory changes that perpetuate each other during progression of renal injury. Renal protection provided by anti-inflammatory drugs is partially mediated by the prevention of glomerular haemodynamic alterations. (C) 2002 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000177951700005 L2 - anti-inflammatory drugs;remnant kidney;persisting;hypertension;glomerular hypertension;renal injury;REMNANT KIDNEY MODEL; ANGIOTENSIN-II; MYCOPHENOLATE-MOFETIL; TUBULOINTERSTITIAL FIBROSIS; SALT RESTRICTION; EXPRESSION; PROLIFERATION; DISEASE; GLOMERULOSCLEROSIS; PATHOGENESIS SO - Journal of Hypertension 2002 ;20():S29-S35 5694 UI - 10352 AU - Herrera-Aguilar A AU - Kechkin OV AD - Univ Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Morelia, Michoacan, MexicoMoscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, RussiaHerrera-Aguilar, A, Univ Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Apdo Postal 2-82, Morelia, Michoacan, Mexico TI - Kalb-Ramond dipole solution in low-energy bosonic string theory AB - We construct a new solution subspace for the bosonic string theory toroidally compactified to 3 dimensions. This subspace corresponds to the complex harmonic scalar field coupled to the effective 3-dimensional gravity. We calculate a class of the asymptotically flat and free of the Dirac string peculiarity solutions which describes a Kalb-Ramond dipole source with the generally nontrivial dilaton characteristics MH - Mexico|Michoacan MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000177777400001 L2 - bosonic string;3-dimensional gravity;SYMMETRIES; DUALITIES; GRAVITY SO - General Relativity and Gravitation 2002 ;34(9):1331-1344 5695 UI - 10220 AU - Herrera-Campos MA AU - Lucking R AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoField Museum Nat Hist, Dept Bot, Chicago, IL 60605, USAHerrera-Campos, MA, Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Apdo Postal 70-233, Mexico City 04510, DF, Mexico TI - The foliicolous lichen flora of Mexico. I. New species from Los Tuxtlas Tropical Biology Station, Veracruz AB - Nine new species of foliicolous lichens are described from Los Tuxtlas Tropical Biology Station, Veracruz, Mexico: Asterothyrium atromarginatum sp. nov. (Asterothyriaceae), Enterographa perez-higaredae sp. nov. (Roccellaceae), Gyalectidium barbatum sp. nov., G. pallidum sp. nov., G. ulloae sp. nov. (Gomphillaceae), Opegrapha heliabravoa sp. nov., O. tuxtlensis sp. nov. (Roccellaceae), Pocsia alvari sp. nov. (Verrucariaceae) and Tricharia sublancicarpa sp. nov. (Gomphillaceae). Pycnidia are reported for the first time in Coenogonium hypophyllum (Vezda) Kalb Lucking. (C) 2002 The British Lichen Society. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Mycology U5 - J;Article AV - English IS - 0024-2829 UR - ISI:000178049400006 L2 - foliicolous lichens;Mexico;COSTA-RICA; ADDITIONS; KNOWLEDGE SO - Lichenologist 2002 ;34():211-222 5696 UI - 10604 AU - Herrera-Gomez A AU - Hegedus A AU - Meissner PL AD - CINVESTAV Queretaro, Real De Juriqulla 76230, Queretaro, MexicoAppl Mat Inc, Thermal Proc Div, Santa Clara, CA 95054, USAHerrera-Gomez, A, CINVESTAV Queretaro, Libramiento Norponiente 2000, Real De Juriqulla 76230, Queretaro, Mexico TI - Chemical depth profile of ultrathin nitrided SiO2 films AB - Ultrathin nitrided SiO2/Si(001) films were studied using angle-resolved x-ray photoemission spectroscopy. The structure of the oxynitride depended on the nitridation process. Under one type of nitridation the film kept the structure of the SiO2, with N assuming O sites. By taking advantage of the nonuniformity on the chemical depth profile, the Si 2p chemical shift was determined for those Si atoms bonded to three O and one N atom, and for those bonded to two O and two N atoms. The stoichiometry depth profile was recognized through a simple method that allowed the input of physical constrains. (C) 2002 American Institute of Physics MH - Mexico|Queretaro MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000177171400022 L2 - INTERFACE; NITROGEN; N2O SO - Applied Physics Letters 2002 ;81(6):1014-1016 5697 UI - 9904 AU - Herrera LG AU - Gutierrez E AU - Hobson KA AU - Altube B AU - Diaz WG AU - Sanchez-Cordero V AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Saskatchewan, Dept Biol, Saskatoon, SK S7N 0X4, CanadaHerrera, LG, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Sources of assimilated protein in five species of New World frugivorous bats AB - Fruits are N-poor items and their availability in the tropics varies throughout the year. Field and experimental studies debate whether frugivorous bats have to switch to N-rich sources of food during part of the year or if they are able to subsist on a fruit-only diet. Different strategies to meet their N requirements may influence the way in which frugivorous bats partition food resources allowing the coexistence of numerous species in tropical communities. We examined the extent to which five species of frugivorous bats relied on plant and insect sources of assimilated protein using stable-N isotope analysis. We assumed that bats only had access to fruits and insects in our analysis but we also collected fecal samples to examine the presence of other food items. We conducted the study during at least I full year depending on the species of bat in a tropical rain forest in southern Mexico. In the five species of bats examined, plant sources (i.e. fruits) provided most of the protein assimilated during the year, although there was a general trend for all species to show a decrease in relative plant contribution at the end of the rainy season and beginning of the dry season. In Artibeus jamaicensis, Uroderma bilobatum and Dermanura phaeotis, plants were still a major source of protein during this period, but in some individuals of Sturnira lilium and Carollia brevicauda insects represented an important contribution to their diet. Fecal samples of most bats presented fruit remains, and insects and pollen were found in small proportions. Bat reproductive activity was detected at the end of the dry season and in the middle of the rainy season, and plants were the major source of protein during this period with the exception of pregnant S. lilum and one pregnant D. phaeotis during the dry season. Our findings showed that frugivorous bats might differ in their strategies to satisfy their N demands with some species relying almost completely on fruits during most of the year and some species switching to insects when fruits were less abundant MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 17 U4 - Ecology U5 - J;Article AV - English IS - 0029-8549 UR - ISI:000179035500002 L2 - frugivory;phyllostomid bats;nutritional ecology;protein requirements;stable-isotope analysis;CAROLLIA-PERSPICILLATA; ARTIBEUS-JAMAICENSIS; ENERGY-REQUIREMENTS; DIETARY OVERLAP; STABLE ISOTOPES; FRUIT BATS; NITROGEN; BIRDS; PHENOLOGY; NUTRITION SO - Oecologia 2002 ;133(3):280-287 5698 UI - 11632 AU - Herrera W AU - Fernandez T AU - az-Comas L AU - Santiago E AU - Sanchez L AU - Bosch J AU - Aubert E AD - Natl Autonomous Univ Mexico, Ctr Neurobiol, Queretaro, MexicoCtr Neurosci, Havana, Cuba TI - Neurofeedback in learning disabled children MH - Cuba MH - Mexico|Queretaro PB - CAMBRIDGE: M I T PRESS RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences;Psychology, Experimental U5 - J;Meeting Abstract AV - English IS - 0898-929X UR - ISI:000174072000038 SO - Journal of Cognitive Neuroscience 2002 ;():23-23 5699 UI - 11881 AU - Herrero-Bervera E AU - Canon-Tapia E AU - Walker GPL AU - Guerrero-Garcia JC AD - Univ Hawaii Manoa, Hawaii Inst Geophys & Planetol, SOEST, Paleomagnet & Petrofabr Lab, Honolulu, HI 96822, USACICESE, Dept Geol, San Diego, CA 92143, USAUniv Bristol, Dept Geol, Bristol BS8 1JR, Avon, EnglandUNAM, Inst Geol, Mexico City, DF, MexicoHerrero-Bervera, E, Univ Hawaii Manoa, Hawaii Inst Geophys & Planetol, SOEST, Paleomagnet & Petrofabr Lab, 2525 Correa Rd, Honolulu, HI 96822 USA TI - The Nuuanu and Wailau giant landslides: insights from paleomagnetic and anisotropy of magnetic susceptibility (AMS) studies AB - The Koolau volcano on the northeastern flank of the Island of Oahu in Hawaii is the source area for one of the largest landslides on Earth, the Nuuanu debris avalanche. The offshore expression of this slide is an extensive rubbly field of debris extending approximately 230 km from the island across the Hawaiian Deep and onto the Hawaiian Arch. We have studied the subaerial lavas of the Koolau volcano as well as the deep-sea sediments on top of the Nuuanu and Wailau landslides by means of magnetostratigraphy and magnetic anisotropy studies to investigate the volcanic evolution, the plumbing of the Koolau volcano and the timing of the Nuuanu detachment. In addition, we have conducted deep-sea magnetostratigraphic studies of a 20 and 7 in piston core recovered by the RV Kana Keoki and the RV Bertha Ann, as well as three 7 m piston cores recovered by the RV Kairei to understand the origins of the giant landslides. The results derived from these investigations indicate that the plumbing of the Koolau volcano is characterized by a very coherent dike complex and by a high dike injection nature. Parts of the Koolau complex are a sheeted dike swarm as in ophiolites as demonstrated by geologic and anisotropy of magnetic susceptibility (AMS) studies. On the other hand, the magnetostratigraphic results of the subaerial part of the Koolau complex indicate that at least one of the normal Reunion Subchrons (ca. Reunion II 2.15 +/- 0.04 to 2.11 +/- 0.04 Ma) had been registered at two different locations. Deep-sea cores have recorded several reversals. The oldest one is the top of the Olduvai Subchron (ca. 1.78 Ma). Land and deep-sea paleomagnetic and plumbing investigations indicate that the collapse of the Koolau volcano had to be relatively rapid in a period of less than 0.5 Ma due to forceful injection of dikes associated with extension and gravitational effects. Therefore, the timing of the main collapse of the Koolau volcano that originated the Nuuanu landslide had to occur between 2.1 and 1.78 million years ago based on the magnetostratigraphic evidence. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000173492200006 L2 - anisotropy of magnetic susceptibility (AMS);deep-sea sediments;Koolau volcano;OAHU; REVERSALS; INTENSITY; COMPLEX SO - Physics of the Earth and Planetary Interiors 2002 ;129(1-2):83-98 5700 UI - 11076 AU - Hess B AU - Saint-Martin H AU - Berendsen HJC AD - Univ Groningen, Dept Biophys Chem, NL-9747 AG Groningen, NetherlandsUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoHess, B, Univ Groningen, Dept Biophys Chem, Nijenborgh 4, NL-9747 AG Groningen, Netherlands TI - Flexible constraints: An adiabatic treatment of quantum degrees of freedom, with application to the flexible and polarizable mobile charge densities in harmonic oscillators model for water AB - In classical molecular simulations chemical bonds and bond angles have been modeled either as rigid constraints, or as nearly harmonic oscillators. However, neither model is a good description of a chemical bond, which is a quantum oscillator that in most cases occupies the ground state only. A quantum oscillator in the ground state can be represented more faithfully by a flexible constraint. This means that the constraint length adapts itself, in time, to the environment, such that the rotational and potential forces on the constraint cancel out. An accurate algorithm for flexible constraints is presented in this work and applied to study liquid water with the flexible and the polarizable "mobile charge densities in harmonic oscillators" model. The iterations for the flexible constraints are done simultaneously with those for the electronic polarization, resulting in negligible additional computational costs. A comparison with fully flexible and rigidly constrained simulations shows little effect on structure and energetics of the liquid, while the dynamics is somewhat faster with flexible constraints. (C) 2002 American Institute of Physics MH - Mexico|Morelos MH - Netherlands PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 17 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000175744600007 L2 - MOLECULAR-DYNAMICS SIMULATION; PATH CENTROID DENSITY; LIQUID WATER; NEUTRON-DIFFRACTION; POTASSIUM CHANNEL; FORMULATION; GEOMETRY; SYSTEMS; ENERGY; EQUILIBRIUM SO - Journal of Chemical Physics 2002 ;116(22):9602-9610 5701 UI - 9243 AU - Hess PO AU - Algora A AU - Hunyadi M AU - Cseh J AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoHungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryUniv Valencia, IFIC, Valencia 46071, SpainKernfys Versneller Inst, NL-9747 AA Groningen, NetherlandsHess, PO, UNAM, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Configuration-mixed effective SU(3) symmetries AB - The procedure of Jarrio et al. (Nuct. Phys. A 528, 409 (1991)) for the determination of the effective SU(3) symmetry of nuclear states is extended to small deformations and to oblate nuclei. Self-consistency checks are carried out both for light and for heavy nuclei MH - Hungary MH - Mexico|Distrito Federal MH - Netherlands MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000180850200007 L2 - SHELL-MODEL; NUCLEI; STATES; SPIN SO - European Physical Journal A 2002 ;15(4):449-454 5702 UI - 11643 AU - Hidaka C AU - Ibarra C AU - Hannafin JA AU - Torzilli PA AU - Quitoriano M AU - Jen SS AU - Warren RF AU - Crystal RG AD - Cornell Univ, Weill Med Coll, Div Pulm & Crit Care Med, New York, NY 10021, USAHosp Special Surg, Lab Soft Tissue Res, New York, NY 10021, USACornell Univ, Belfer Gene Therapy Core Facil, New York, NY, USAInst Nacl Ortopedia, Mexico City, DF, MexicoCornell Univ, Weill Med Coll, Inst Med Genet, New York, NY, USAHidaka, C, Cornell Univ, Weill Med Coll, Div Pulm & Crit Care Med, 520 E 70th St,ST 505, New York, NY 10021 USA TI - Formation of vascularized meniscal tissue by combining gene therapy with tissue engineering AB - Ingrowth of host blood vessels into engineered tissues has potential benefits for successful transplantation of engineered tissues as well as healing of surrounding host tissues. In particular, the use of a vascularized bioengineered tissue could be beneficial for treating injuries to the meniscus, a structure in the knee where the lack of a vascular supply is associated with an inadequate healing response. In this study, gene transfer using an adenovirus vector encoding the hepatocyte growth factor gene (AdHGF) was used to induce blood vessel formation in tissue-engineered meniscus. Bovine meniscal cells were treated with AdHGF, a vector encoding a marker gene E. coli beta-galactosidase (Adbetagal), or no virus. Cells were seeded onto poly-glycolic acid felt scaffolds and then transplanted into the subcutaneous pouch of athymic nude mice for 8 weeks. Expression of the marker gene and HGF was detectable for several weeks after gene transfer. Ink injection studies showed that AdHGF-treated meniscal cells formed tissue which contained fourfold more blood vessels at 2 weeks (p < 0.02) and 2.5-fold more blood vessels at 8 weeks (p < 0.001) posttransplantation than controls. This study demonstrates the feasibility of using adenovirus-mediated gene transfer to engineer a blood supply in the bioengineered meniscal tissue MH - Mexico|Distrito Federal MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 27 U4 - Biotechnology & Applied Microbiology;Cell Biology U5 - J;Article AV - English IS - 1076-3279 UR - ISI:000174157000010 L2 - HEPATOCYTE GROWTH-FACTOR; SCATTER FACTOR; ADENOVIRUS VECTORS; MOLECULAR-CLONING; KNEE-JOINT; ANGIOGENESIS; REPAIR; EXPRESSION; DELIVERY; INVIVO SO - Tissue Engineering 2002 ;8(1):93-105 5703 UI - 10715 AU - Hidalgo-Gamez AM AU - Olofsson K AD - Astron Observ, S-75120 Uppsala, SwedenHidalgo-Gamez, AM, Inst Politecn Nacl, Mexico City, DF, Mexico TI - The chemical content of a sample of dwarf irregular galaxies AB - We present abundances of neon, nitrogen and oxygen of some nearby dwarf irregular galaxies. The elemental abundances are retrieved from long-slit spectroscopy of H II regions in the objects. The abundances are found to be sub-solar in all cases. For the dwarf irregular galaxy DDO 190 the abundances reported in this work are the first ever published. One object, DDO 167, proved to have an oxygen abundance about similar to the one of I Zw 18, even though the uncertainties are high. A comparison of the chemical abundances between all the groups of gas-rich galaxies have been performed and the main conclusion is that the dwarf gas-rich galaxies are not distinguishable on the basis of their chemical content MH - Mexico|Distrito Federal MH - Sweden PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000176877800014 L2 - galaxies : evolution;galaxies : irregular;galaxies : stellar content;galaxies : dwarf;H-II REGIONS; BLUE COMPACT GALAXIES; OXYGEN ABUNDANCES; STELLAR POPULATIONS; ELEMENT ABUNDANCES; STAR-FORMATION; HII-REGIONS; EVOLUTION; GR-8; NITROGEN SO - Astronomy & Astrophysics 2002 ;389(3):836-844 5704 UI - 11500 AU - Hilgert N AU - Minjarez-Sosa JA AD - ENSAM, INRA, Lab Biometrie, F-34060 Montpellier 1, FranceUniv Sonora, Dept Matemat, Hermosillo 83000, Sonora, MexicoHilgert, N, ENSAM, INRA, Lab Biometrie, 2 Pl Viala, F-34060 Montpellier 1, France TI - Adaptive policies for time-varying stochastic systems under discounted criterion AB - We consider a class of time-varying stochastic control systems, with Borel state and action spaces, and possibly unbounded costs. The processes evolve according to a discrete-time equation x(n+1) = G(n)(x(n), a(n), xi(n)), n = 0, 1,..., where the xi(n) are i.i.d. R-k-valued random vectors whose common density is unknown, and the G, are given functions converging, in a restricted way, to some function Ginfinity as n --> infinity. Assuming observability of xi(n), we construct an adaptive policy which is asymptotically discounted cost optimal for the limiting control system x(n+1) = Ginfinity(x(n), a(n), xi(n)) MH - France MH - Mexico|Sonora PB - HEIDELBERG: PHYSICA-VERLAG GMBH & CO RP - NOT IN FILE U3 - TC 0 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 1432-2994 UR - ISI:000174672100012 L2 - non-homogeneous Markov control processes;discrete-time stochastic systems;discounted cost criterion;optimal adaptive policy;MARKOV CONTROL PROCESSES; UNBOUNDED COSTS SO - Mathematical Methods of Operations Research 2002 ;54(3):491-505 5705 UI - 10883 AU - Hille L AU - de la Pena JA AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Hamburg, D-20146 Hamburg, Germanyde la Pena, JA, Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Stable representations of quivers AB - Let Q be a finite quiver without oriented cycles and let kQ the path algebra of Q over an algebraically closed field k. We investigate stable finite dimensional representations of Q. That is for a fixed dimension vector d and a fixed weight theta we consider theta-stable representations of Q with dimension vector d. If we wish to compare also representations with different dimension vectors, then it is more convenient to consider a slope p instead of a weight theta, In particular, we apply the results of Harder-Narasimhan on natural filtrations associated to any fixed slope mu to the category of representations of Q. Further we introduce the wall system for weights with respect to a fixed dimension vector d and consider several examples, (C) 2001 Published by Elsevier Science B.V MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000176265000007 L2 - FINITE-DIMENSIONAL ALGEBRAS; COXETER TRANSFORMATIONS; BUNDLES; SPACES; CURVES; MODULI SO - Journal of Pure and Applied Algebra 2002 ;172(2-3):205-224 5706 UI - 10478 AU - Hingerl K AU - Bonanni A AU - Balderas R AU - Stifter D AD - Profactor GmbH, A-4400 Steyr, AustriaJohannes Kepler Univ, Inst Halbleiter & Festkorperphys, A-4040 Linz, AustriaUniv Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi, SLP, MexicoHingerl, K, Profactor GmbH, Wehrgrabengasse 5, A-4400 Steyr, Austria TI - In situ optical techniques for monitoring the formation of nanostructures AB - Various optical techniques have been developed to meet new challenges in epitaxial growth. The primary parameters needed for growth control, layer thicknesses, and composition strongly influence the formation of nanostructures on surfaces. These two parameters can be obtained with spectroscopic ellipsometry. In this article, we discuss a similiar technique, reflectance difference/anisotropy spectroscopy, which is capable of monitoring in situ the surface stress occuring from surface reconstructions, e.g. dimerization. Using reflectance difference spectroscopy in situ the size and shape of epitaxially grown self-assembling Mn-based nanostructures was reproducibly achieved by tracing the formation process. A variety of well controlled strain-induced island morphologies was obtained with the deposition of semiconducting materials on different Mn surfaces MH - Austria MH - Mexico|San Luis Potosi PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000177304400006 L2 - REFLECTANCE-DIFFERENCE SPECTROSCOPY; MOLECULAR-BEAM EPITAXY; INAS QUANTUM DOTS; LIGHT-SCATTERING; GROWTH; GAAS; RELAXATION; GAAS(001); TRANSITION; ANISOTROPY SO - Physica Status Solidi B-Basic Research 2002 ;232(1):13-23 5707 UI - 10100 AU - Hinojosa G AU - Covington AM AU - Phaneuf RA AU - Sant'Anna MM AU - Hernandez R AU - Covington IR AU - Dominguez I AU - Bozek JD AU - Schlachter AS AU - Alvarez I AU - Cisneros C AD - UNAM, Ctr Ciencias Fis, Cuernavaca 61213, Morelos, MexicoUniv Nevada, Dept Phys, Reno, NV 89557, USAUniv Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, BrazilUAEM, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoCtr Nacl Metrol, Queretaro 76241, MexicoUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAHinojosa, G, UNAM, Ctr Ciencias Fis, Apartado Postal 6-96, Cuernavaca 61213, Morelos, Mexico TI - Formation of long-lived CO2+ via photoionization of CO+ AB - The formation of long-lived CO2+ from CO+ via photoionization in the energy range 25 to 45 eV was studied experimentally at high spectral resolution. All five allowed components of a Rydberg series with an electronically excited (3)Sigma(+)(nu=0) core are identified. Four components of a second Rydberg series with a vibrationally excited (3)Sigma(+)(nu=1) core and structure due to the initial vibrational state of the ion beam are also discernible. The total photoionization cross section was measured with a vibrationally relaxed CO+ ion beam. Franck-Condon factors from ground state CO+ to the relevant CO2+ states were calculated MH - Brazil MH - Mexico|Morelos MH - Mexico|Queretaro MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000178382500077 L2 - PHOTOELECTRONS COINCIDENCE SPECTROSCOPY; DOUBLY-CHARGED IONS; DISSOCIATION; COLLISION; MOLECULES; DYNAMICS; DICATION SO - Physical Review A 2002 ;66(3): 5708 UI - 10573 AU - Hirotani H AU - Naranjo J AU - Moroyoqui PG AU - Gerba CP AD - Ehime Univ, Dept Environm Conservat, Matsuyama, Ehime 790, JapanUniv Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721, USAOsaka Kyoiku Univ, Dept Arts & Sci, Kashiwara, Osaka 5828552, JapanInst Technol Sonora, Mexico City, DF, MexicoHirotani, H, Ehime Univ, Dept Environm Conservat, Tarumi 3-5-7, Matsuyama, Ehime 790, Japan TI - Demonstration of indicator microorganisms on surface of vegetables on the market in the United States and Mexico AB - Presence of indicator microorganisms of fecal pollution on the surface of vegetables sold in retail markets is demonstrated. Vegetables were obtained from local markets in the U.S.A. and Mexico. At least I of the indicators, among coliphages, fecal streptococci, total coliforms, and fecal coliforms, was detected in every sample tested. Relatively small amounts of indicators were recovered from the U.S.A. samples. Fecal streptococci showed significant correlations with all other indicators. However, some U.S.A. samples low in fecal streptococci were found to harbor certain levels of other indicators. Upon introduction of an indicator system to detect the fecal contamination of agriculture crops, it is recommended that multiple indicator microorganisms be measured MH - Japan MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000177064100045 L2 - vegetable;microbial indicators;coliphages;fecal streptococci;coliforms;HEPATITIS-A; PATHOGENIC MICROORGANISMS; CLOSTRIDIUM-PERFRINGENS; COSTA-RICA; COLIPHAGES; POLLUTION; OUTBREAK; PRODUCE; LETTUCE SO - Journal of Food Science 2002 ;67(5):1847-1850 5709 UI - 9651 AU - Hirsch JG AU - Popa G AU - Vargas CE AU - Draayer JP AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoRochester Inst Technol, Dept Phys, Rochester, NY 14623, USAGrand Accelerateur Natl Ions Lourds, F-14076 Caen, FranceLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAHirsch, JG, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Microscopic description of odd- and even-mass Er isotopes MH - France MH - Mexico|Distrito Federal MH - USA PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000179714300032 L2 - Er isotopes;rotational bands;electromagnetic transitions;pseudo-SU(3) model;HEAVY DEFORMED-NUCLEI; SHELL-MODEL DESCRIPTION; NORMAL PARITY BANDS; GROUND-STATE; ER-167; GDR; EXCITATIONS; STRENGTHS SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2002 ;16(1-4):291-301 5710 UI - 10357 AU - Hirsch JG AU - Hess PO AU - Civitarese O AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Phys, RA-1900 La Plata, ArgentinaHirsch, JG, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Postal 70-543, Mexico City 04510, DF, Mexico TI - The use of coherent states in the variational treatment of proton-neutron interactions AB - Coherent states are used as trial states to determine, variationally, the structure of the eigenvectors belonging to a schematic Hamiltonian consisting of single-particle, pairing and residual proton-neutron interaction terms. It is shown that the standard proton-neutron quasiparticle random-phase approximation (pn-QRPA) is recovered, as a variational theory, by replacing quasiparticle pair creation and annihilation operators by bosons. It is also shown that an exact, algebra preserving, mapping of the Hamiltonian is needed to describe the spectrum beyond the QRPA phase transition. The role of the spurious components of the trial wave functions is discussed MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000177729100010 L2 - DOUBLE-BETA-DECAY; RANDOM-PHASE-APPROXIMATION; BOSON-EXPANSION THEORIES; EXACTLY SOLVABLE MODEL; ART. NO. 064303; FERMI TRANSITIONS; SPURIOUS STATES; RPA; SUPPRESSION; UNIFICATION SO - European Physical Journal A 2002 ;14(3):355-364 5711 UI - 10425 AU - Hirsch JG AU - Castanos O AU - Hess PO AU - Civitarese O AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaHirsch, JG, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Theoretical description of double beta decay of Gd-160 AB - The half-life of the betabeta(2nu) decay of Gd-160 is estimated by including the pairing interaction within the pseudo-SU(3) model. This process was previously reported as theoretically forbidden in the context of that model, however, the pairing interaction is able to mix different occupations and opens new channels for the decay. Explicit expressions are presented for the mixing induced by the pairing force. Matrix elements for the betabeta(2nu) and betabeta(0nu) decays are now calculated by assuming both a dominant component in the wave function of the ground state of Gd-160 and a more general model space. The results, of the calculated betabeta half-lives, suggest that the planned experiments would succeed in detecting the betabeta(2nu) decay of Gd-160 and, eventually, would improve the limits for the zero-neutrino mode MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000177529700059 L2 - HEAVY DEFORMED-NUCLEI; SHELL-MODEL DESCRIPTION; NORMAL PARITY BANDS; LOW-ENERGY STRUCTURE; EXCITED-STATES; SCISSORS MODE; SUPPRESSION; STRENGTHS; SCHEME; MO-100 SO - Physical Review C 2002 ;66(1): 5712 UI - 10899 AU - Hirsch JG AU - Castanos O AU - Hess PO AU - Ceron VE AU - Civitarese O AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUAEH, Ctr Invest Avabzadas & Ingn Ind, Pachuca 42020, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaHirsch, JG, UNAM, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Double-beta decay in deformed nuclei AB - A brief review of theoretical results for the double-beta decay and the double-electron capture in heavy deformed nuclei is presented. The betabeta half life of Gd-160 is evaluated using an extended version of the pseudo SU(3) model. While the 2nu mode is forbidden when the most probable occupations are considered, states with different occupation numbers can be mixed through the pairing interaction. The amount of this mixing is calculated using perturbation theory. The possibility of observing the betabeta decay in Gd-160 is discussed for both the 2nu and 0nu modes MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Hidalgo PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000176267400008 L2 - double-beta decay;two- and zero-neutrino modes;deformed nuclei;SHELL-MODEL DESCRIPTION; LOW-ENERGY STRUCTURE; NORMAL PARITY BANDS; CAPTURE; GD-160; STATES SO - Czechoslovak Journal of Physics 2002 ;52(4):513-519 5713 UI - 11017 AU - Hirsch JG AU - Castanos O AU - Hess PO AU - Civitarese O AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaHirsch, JG, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Selection rules in the beta beta decay of deformed nuclei AB - The 2nu betabeta decay half-lives of six nuclei, whose decays were previously reported as theoretically forbidden, are calculated by including the pairing interaction, which mixes different occupations and opens up the possibility of the decay. All allowed channels for the Onu betabeta decay are also computed. The estimated 2nu betabeta half-lives suggest that measurements in Pu-244 may find positive signals. and that planned experiments would succeed in detecting betabeta(2nu) decay in Gd-160. Limits for the zero neutrino mode, in the analyzed deformed emitters, are predicted. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000175909300008 L2 - NORMAL PARITY BANDS; SHELL-MODEL; PSEUDOSPIN SYMMETRY; MATRIX-ELEMENTS; GD-160; MO-100; SUPPRESSION; STRENGTHS; SEARCH; GE-76 SO - Physics Letters B 2002 ;534(1-4):57-62 5714 UI - 11366 AU - Hirsch JG AU - Mariano A AU - Dukelsky J AU - Schuck P AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaCSIC, Inst Estructura Mat, Madrid 28006, SpainUniv Paris 11, Inst Nucl Phys, F-91406 Orsay, FranceHirsch, JG, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Fully self-consistent RPA description of the many level pairing model AB - The self-consistent RPA (SCRPA) equations in the particle-particle channel are solved without any approximation for the picket fence model, The results are in excellent agreement with the exact solutions found with the Richardson method. Particularly interesting features are that screening corrections reverse the sign of the interaction and that SCRPA yields the exact energies in the case of two levels with two particles. (C) 2002 Elsevier Science (USA) MH - Argentina MH - France MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 23 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000175074400003 L2 - RANDOM-PHASE-APPROXIMATION; NUCLEAR-MATTER; FERMI SYSTEMS SO - Annals of Physics 2002 ;296(2):187-213 5715 UI - 10546 AU - Hoedjes JCB AU - Zuurbier RM AU - Watts CJ AD - Univ Wageningen & Res Ctr, Meteorol & Air Qual Grp, NL-6701 AP Wageningen, NetherlandsReyes & Aguascalientes Esq, IMADES, Hermosillo 83190, Sonora, MexicoZuurbier, RM, Univ Wageningen & Res Ctr, Meteorol & Air Qual Grp, Duivendaal 2, NL-6701 AP Wageningen, Netherlands TI - Large aperture scintillometer used over a homogeneous irrigated area, partly affected by regional advection AB - Scintillometer measurements were collected over an irrigated wheat field in a semi-arid region in northwest Mexico. Conditions were unstable in the morning and stable during the afternoon, while latent heat fluxes remained high throughout the day. Regional advection was observed during near-neutral conditions. Monin-Obukhov similarity relationships for the structure parameter of temperature were verified in both unstable and stable conditions, but were violated close to near-neutral conditions. We found that, using additional measurements of radiation, soil heat flux and windspeed, areally averages of both sensible and latent heat fluxes can be reliably predicted by large aperture scintillometer measurements, as long as the net radiation is greater than zero MH - Mexico|Sonora MH - Netherlands PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0006-8314 UR - ISI:000177292600006 L2 - Monin-Obukhov similarity theory;regional advection;scintillation method;structure parameter of temperature;surface fluxes;INDEX-STRUCTURE PARAMETER; SURFACE-LAYER FLUXES; REFRACTIVE-INDEX; TEMPERATURE; SCINTILLATION; FLUCTUATIONS; HUMIDITY; HEAT; BEHAVIOR SO - Boundary-Layer Meteorology 2002 ;105(1):99-117 5716 UI - 10564 AU - Hoffmann K AU - Dreger CK AU - Olins AL AU - Olins DE AU - Shultz LD AU - Lucke B AU - Karl H AU - Kaps R AU - Muller D AU - Vaya A AU - Aznar J AU - Ware RE AU - Cruz NS AU - Lindner TH AU - Herrmann H AU - Reis A AU - Sperling K AD - Max Delbruck Ctr Mol Med, Gene Mapping Ctr, D-13125 Berlin, GermanyHumboldt Univ, Charite, HELIOS Klinikum, Franz Volhard Clin, Berlin, GermanyGerman Canc Res Ctr, D-6900 Heidelberg, GermanyFdn Blood Res, Scarborough, ME 04074, USABowdoin Coll, Brunswick, ME 04011, USAJackson Lab, Bar Harbor, ME 04609, USADRK, Inst Transfus Med, Chemnitz, GermanyKlinikum Chemnitz, Inst Med Genet, Chemnitz, GermanyLa Fe Univ Hosp, Dept Clin Pathol, Valencia, SpainDuke Univ, Dept Pediat, Med Ctr, Durham, NC 27706, USAHosp Infantil Estado Sonora, Hermosillo, Sonora, MexicoUniv Wurzburg, Med Clin, Dept Nephrol, Wurzburg, GermanyUniv Erlangen Nurnberg, Inst Human Genet, D-8520 Erlangen, GermanyHumboldt Univ, Charite, Inst Human Genet, D-13353 Berlin, GermanySperling, K, Max Delbruck Ctr Mol Med, Gene Mapping Ctr, Robert Rossle Str 10, D-13125 Berlin, Germany TI - Mutations in the gene encoding the lamin B receptor produce an altered nuclear morphology in granulocytes (Pelger-Huet anomaly) AB - Pelger-Huet anomaly (PHA; OMIM *169400) is an autosomal dominant disorder characterized by abnormal nuclear shape and chromatin organization in blood granulocytes. Affected individuals show hypolobulated neutrophil nuclei with coarse chromatin. Presumed homozygous individuals have ovoid neutrophil nuclei, as well as varying degrees of developmental delay, epilepsy and skeletal abnormalities(1-3). Homozygous off-spring in an extinct rabbit lineage showed severe chondrodystrophy, developmental anomalies and increased pre- and postnatal mortality(4,5). Here we show, by carrying out a genome-wide linkage scan, that PHA is linked to chromosome 1q41-43. We identified four splice-site, two frameshift and two nonsense mutations in LBR, encoding the lamin B receptor. The lamin B receptor (LBR), a member of the sterol reductase family(6), is evolutionarily conserved and integral to the inner nuclear membrane; it targets heterochromatin and lamins to the nuclear membrane(7,8). Lymphoblastoid cells from heterozygous individuals affected with PHA show reduced expression of the lamin B receptor, and cells homozygous with respect to PHA contain only trace amounts of it. We found that expression of the lamin B receptor affects neutrophil nuclear shape and chromatin distribution in a dose-dependent manner. Our findings have implications for understanding nuclear envelope-heterochromatin interactions, the pathogenesis of Pelger-like conditions in leukemia(9), infection(10) and toxic drug reactions(11), and the evolution of neutrophil nuclear shape(12) MH - Germany MH - Mexico|Sonora MH - Spain MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 82 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1061-4036 UR - ISI:000177147100018 L2 - DREIFUSS MUSCULAR-DYSTROPHY; ENVELOPE INNER MEMBRANE; INTEGRAL PROTEIN; PORE COMPLEXES; ROD DOMAIN; A/C; LBR; ORGANIZATION; SYSTEM; CELLS SO - Nature Genetics 2002 ;31(4):410-414 5717 UI - 10583 AU - Holguin F AU - Tellez-Rojo M AU - Cortez M AU - Hernandez M AU - Chow J AU - Watson J AU - Romieu J AD - Inst Nacl Salud Publ, Mexico City, DF, MexicoEmory Univ, Sch Med, Atlanta, GA, USA TI - A preliminary study to assess the role of PM2.5 elemental composition and elemental carbon content on heart rate variability MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600245 SO - Epidemiology 2002 ;13(4):S125-S125 5718 UI - 11519 AU - Holt SJ AU - Cress WA AU - Van Staden J AD - Univ Natal, Sch Bot & Zool, Res Ctr Plant Growth & Dev, ZA-3209 Scottsville, South AfricaUniv Missouri, Div Biol Sci, Columbia, MO 65211, USAInst Potosino Invest Cient & Tecnol, San Luis Potosi 78210, MexicoVan Staden, J, Univ Natal, Sch Bot & Zool, Res Ctr Plant Growth & Dev, Private Bag X01, ZA-3209 Scottsville, South Africa TI - Evidence for dynamic alteration in histone gene clusters of Caenorhabditis elegans: a topoisomerase II connection? AB - Chromatin integrity is maintained throughout the cell cycle through repair mechanisms and intrinsically by the ordered packaging of DNA in association with histone proteins; however, aberrant rearrangements within and between chromosomes do occur. The role of the nuclear matrix protein topoisomerase II (TopoII) in generating chromosome breakpoints has been a focus of recent investigations. TopoII preferentially binds in vitro to scaffold-associated regions (SARs) and is involved in many DNA processing activities that require chromosome untangling. SARs, biochemically defined DNA elements rich in A + T, have been proposed to serve as structural boundaries for chromatin loops and to delineate functional domains. In our investigation of gene compartmentalization in a eukaryotic genome, SAR-associated nucleotide motifs from Drosophila were mapped in the regions of three histone gene clusters in an in silico analysis of the genome of Caenorhabditis elegans. Sites with similarity to the 15 bp consensus for TopoII cleavage were found predominantly in A + T enriched intergenic regions. Reiteration of sites matching the TopoII core consensus led to the identification of a novel core histone gene on chromosome IV and provided evidence for duplication and inversion in each of the three histone gene clusters. Breakpoint analysis of DNA flanking reiterated regions revealed potential sites for TopoII cleavage and a base composition phenomenon suggestive of a trigger for inversion events MH - Mexico|San Luis Potosi MH - South Africa MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6723 UR - ISI:000174721100002 L2 - STRAND DNA CLEAVAGE; ATTACHMENT SITES; DROSOPHILA-MELANOGASTER; SEQUENCE ALIGNMENT; NUCLEAR SCAFFOLD; ORGANIZATION; CHROMOSOME; REGIONS; LOOP; RECOMBINATION SO - Genetical Research 2002 ;79(1):11-22 5719 UI - 10108 AU - Hoover RS AU - Poch E AU - Monroy A AU - Vazquez N AU - Nishio T AU - Gamba G AU - Hebert SC AD - Yale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06510, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City, DF, Mexico TI - N-glycosylation at two sites critically alters thiazide binding and activity of the rat thiazide-sensitive NaCl cotransporter MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757500364 SO - Journal of the American Society of Nephrology 2002 ;13():75A-75A 5720 UI - 9588 AU - Hoppe M AU - Barboza-Gudino JR AU - Schulz HM AD - Tech Univ Clausthal, Inst Geol & Palaeontol, Dept Petrol Geol, D-38678 Clausthal Zellerfeld, GermanyUniv Autonoma San Luis Potosi, Inst Geol, San Luis Potosi 78240, MexicoHoppe, M, Tech Univ Clausthal, Inst Geol & Palaeontol, Dept Petrol Geol, Leibnizstr 10, D-38678 Clausthal Zellerfeld, Germany TI - Late Triassic submarine fan deposits in northwestern San Luis Potosi, Mexico - lithology, facies and diagenesis AB - Rare outcrops of Late Triassic marine sediments in northern Central-Mexico point to a passive margin. The lack of relevant paleontological data prohibits a clear Triassic classification of similar sediments in this region (e. g. in the Sierra de Catorce, S.L.P.). Sedimentological analysis of outcrops in the Sierra de Catorce and in the Sierra de Charcas reflects deposition within a submarine fan, implicating that sediments of both localities may be correlated regarding age and depositional environment. Sedimentological data of both locations point to deposition within a Mid-Fan environment. The graywacke composition favors a consolidated continental block as sediment source. In contrast to previous assumptions, no metamorphic overprint affected the investigated sediments MH - Germany MH - Mexico|San Luis Potosi PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 0 U4 - Paleontology U5 - J;Article AV - English IS - 0028-3630 UR - ISI:000179812800001 SO - Neues Jahrbuch fur Geologie und Palaontologie-Monatshefte 2002 ;(12):705-724 5721 UI - 10018 AU - Horneff G AU - Burgos-Vargas R AD - Univ Halle Wittenberg, Klin & Poliklin Kinder & Jugendmed, Dept Paediat, D-06097 Halle Saale, GermanyHosp Gen Mexico City, Div Res, Mexico City, DF, MexicoHorneff, G, Univ Halle Wittenberg, Klin & Poliklin Kinder & Jugendmed, Dept Paediat, D-06097 Halle Saale, Germany TI - TNF-alpha antagonists for the treatment of juvenile-onset spondyloarthritides AB - Juvenile-onset spondyloarthritides (SpA) is a term for a group of HLAB27 related disorders. The hallmark signs and symptoms of this group of disorders include peripheral arthritis and enthesitis while sacroiliitis and spondylitis develop in some cases later on and extrarticular manifestations such as anterior uveitis occurs occasionally. Conventional medical therapy in children consists of non-steroidal anti-inflammatory drugs and corticosteroids that are administered intraarticulary, even in the sacroiliac joints. Sulfasalazine and methotrexate are given in cases of chronic synovitis or enthesitis. Unfortunately, these forms of therapy have limited efficacy in many cases and disease activity and damage may lead to various degrees of functional impairment. Recently, experience with TNFalpha-antagonists in adults has opened new perspectives for treating patients with refractory SpA, particularly ankylosing spondylitis (AS). So far there is only little experience in the treatment of juvenile-onset SpA, consisting of case reports and case series where etanercept or infliximab have been given to children suffering from refractory juvenile-onset AS and psoriatic arthritis. From these observations there is evidence that treatment seems to be as effective as in adults. Risks are likely to be the same as in patients suffering from other forms of juvenile idiopathic arthritides. However, without further studies no recommendations can be provided for indication for treatment, dosing, intervals and duration of treatment MH - Germany MH - Mexico|Distrito Federal PB - PISA: CLINICAL & EXPER RHEUMATOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Rheumatology U5 - J;Article AV - English IS - 0392-856X UR - ISI:000178700400029 L2 - juvenile arthritis;juvenile-onset spondyloarthritides;etanercept;infliximab;NECROSIS-FACTOR-ALPHA; ANKYLOSING-SPONDYLITIS; RHEUMATOID-ARTHRITIS; PSORIATIC-ARTHRITIS; PEDIATRIC-RHEUMATOLOGY; MONOCLONAL-ANTIBODY; ETANERCEPT THERAPY; DIFFERENT FORMS; DISEASE; INFLIXIMAB SO - Clinical and Experimental Rheumatology 2002 ;20(6):S137-S142 5722 UI - 9897 AU - Horowitz YS AU - Satinger D AU - Avila O AD - Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoHorowitz, YS, Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel TI - Theory of heavy charged particle thermoluminescence response: The extended track interaction model AB - The theory of heavy charged particle TL response is described in the framework of the extended track interaction model (ETIM) which includes an enhanced understanding of the role/parameters of the individual track (i.e. the track structure) which influence the track interaction effects, a more sophisticated treatment of track interaction effects as well as it revised analytical treatment of saturation effects based on knowledge of the dose-filling constants of the TCs and LCs MH - Israel MH - Mexico|Distrito Federal PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899600016 L2 - SUPRALINEARITY SO - Radiation Protection Dosimetry 2002 ;100(1-4):91-94 5723 UI - 9898 AU - Horowitz YS AU - Satinger D AU - Brandan ME AU - Avila O AU - Rodriguez-Villafuerte M AD - Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoHorowitz, YS, Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel TI - Supralinearity of peaks 5a, 5 and 5b in TLD-100 following 6.8 MeV and 2.6 MeV He ion irradiation: The extended track interaction model AB - The extended track interaction model (ETIM) is applied to the TL fluence response of peaks 5, 5b and 5a following 6.8 MeV and 2.6 MeV He ion irradiation of LiF:Mg,Ti (TLD-100) MH - Israel MH - Mexico|Distrito Federal PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000178899600017 SO - Radiation Protection Dosimetry 2002 ;100(1-4):95-98 5724 UI - 11099 AU - Howard RW AU - Perez-Lachaud G AD - USDA ARS, GMPRC, Manhattan, KS 66502, USAEl Colegio Frantera Sur, Chiapas, MexicoHoward, RW, USDA ARS, GMPRC, 1515 Coll Ave, Manhattan, KS 66502, USA TI - Cuticular hydrocarbons of the ectoparasitic wasp Cephalonomia hyalinipennis (Hymenoptera : Bethylidae) and its alternative host, the stored product pest Caulophilus oryzae (Coleoptera : Curculionidae) AB - Cuticular hydrocarbons of an ectoparositic wasp attacking two beetle hosts have been identified and examined for the influence of age, gender, mating status, and host on hydrocarbon composition. The 37 wasp hydrocarbons identified consisted of a series of n-alkanes (C-16 to C-33), 3-, 5-, 9-, 10-, 11-, and 12-methyl alkanes and a series of Z-7 and Z-9 monoenes (C-23:1 to C-27.1). One C-25:2 diene was found. No effects of hydrocarbon composition as a function of age, gender, or mating status were found for the wasps. Wasps reared on Hypothenemus hampei, however, had 12/37 significant abundance differences to those reared on Caulophilus oryzae, although all but one of these differences were for components in less than 2% relative abundance. The C-25:2 diene from wasps reared on H. hampei was present in about 10% whereas from wasps reared on C. oryzae it was present in about 2%. The hydrocarbons of one host for this wasp, the coffee berry borer (Coleoptera: Scolytidae), have been previously reported [Howard and Infante, Ann. Entomol. Soc. Am. 89:700-709 (1996)]. The hydrocarbons of the alternative host, C. oryzae (Coleoptera: Curculionidoe) consists of n-olkanes (C-17 to C-31, 3-, 4-, 5-, 7-, 9-, 11 -, 12-, 13-, 14-, and 1 5-methyl alkanes, and a series of dimethyl alkanes of the series 3, 17-; 5, 11 -; 5, 17-; 7, 11-; 7, 13-; 13, 17-; and 15, 19-. No unsaturated hydrocarbons were found. No significant differences in hydrocarbon composition were found between male and female C. oryzae. Hydrocarbon patterns of four species of Cephalonomia are compared and shown to be species-specific. The data are discussed in terms of ecological and physiological parameters.Published 2002 Wiley-Liss, Inc.(dagger) MH - Mexico|Chiapas MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Entomology;Physiology U5 - J;Article AV - English IS - 0739-4462 UR - ISI:000175784800003 L2 - semiochemical;chemical ecology;gender recognition;chemotaxonomy;Cephalonomia hyalinipennis;Caulophilus oryzae;Hypothenemus hampei;COFFEE BERRY BORER; CRYPTOLESTES-FERRUGINEUS COLEOPTERA; HYPOTHENEMUS-HAMPEI COLEOPTERA; STEPHANODERIS HYMENOPTERA; WATERSTONI HYMENOPTERA; TARSALIS HYMENOPTERA; SCOLYTIDAE; CUCUJIDAE; BIOLOGY; OVIPOSITION SO - Archives of Insect Biochemistry and Physiology 2002 ;50(2):75-84 5725 UI - 11499 AU - Hoyle C AU - Narvaez V AU - Alldus G AU - Lovell-Badge R AU - Swain A AD - Inst Canc Res, Sect Gene Funct & Regulat, Chester Beatty Labs, London SW3 6JB, EnglandNatl Inst Med Res, MRC, Div Dev Genet, London NW7 1AA, EnglandUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoSwain, A, Inst Canc Res, Sect Gene Funct & Regulat, Chester Beatty Labs, 237 Fulham Rd, London SW3 6JB, England TI - Dax1 expression is dependent on steroidogenic factor 1 in the developing gonad AB - The nuclear hormone receptor DAX1 has been implicated.,in mammalian gonad development and sex determination. The expression of the gene in the gonad follows a dynamic pattern in time and place in the embryo and the adult. We have undertaken the first in vivo study of the regulation of Dax1 expression. Using a transgenic mouse approach we have identified a novel 500-bp region 4 kb upstream of the mouse Dax1 start codon that is essential for LacZ reporter gene expression in the embryonic gonad. Within this region, a highly conserved steroidogenic factor 1 (SF1) consensus-binding site is necessary to direct LacZ expression to the embryonic gonad implicating SF1 in the regulation of Dax1 in the developing gonad. Consistent with this, Dax1 is expressed at much reduced levels in gonads of embryos that are deficient in SF1. In addition, our results show that SF1 consensus-binding sites close to the start of Dax1 transcription are important in regulating levels of expression in the developing gonad. These studies have identified the critical in vivo regulatory region for expression of Dax1 in the early gonad and provide novel information on how a specific enhancer element acts in different cell types at different stages of development MH - United Kingdom MH - Mexico|Morelos PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 23 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0888-8809 UR - ISI:000174622100008 L2 - ADRENAL HYPOPLASIA CONGENITA; MULLERIAN-INHIBITING SUBSTANCE; NUCLEAR RECEPTOR SF-1; FACTOR-I; SEX DETERMINATION; GENE-EXPRESSION; TRANSCRIPTION FACTOR; SERTOLI CELLS; PROMOTER; DOMAIN SO - Molecular Endocrinology 2002 ;16(4):747-756 5726 UI - 11375 AU - Hoyos SEG AU - Nieto LM AU - Rubio FC AU - Cormenzana AR AD - Ctr Interamer Recursos Agua Interamer Ctr Water R, CIRA, Toluca 50130, Edo De Mexico, MexicoUniv Granada, Dept Chem Engn, Fac Sci, Granada, SpainUniv Granada, Dept Microbiol, Fac Pharm, Granada, SpainHoyos, SEG, Ctr Interamer Recursos Agua Interamer Ctr Water R, CIRA, Toluca 50130, Edo De Mexico, Mexico TI - Kinetics of aerobic treatment of olive-mill wastewater (OMW) with Aspergillus terreus AB - A kinetic study was carried out on the aerobic treatment of olive-mill wastewater by fermentation with Aspergillus terreus. The bioreactor used was batch fed at several concentrations. The aerobic treatment process followed a Quiroga and Sales model, which is represented by a second-grade polynomial from which the kinetic constants; maximum substrate concentration (h), maximum specific growth rate (P) and organic matter present in the medium (q) were calculated by using a non-linear regression. The mean values for chemical oxygen demand (COD) elimination velocity were 126.3 mg l(-1) h(-1) in the first 24 h and 77.3 mg l(-1) h(-1) at 72 h, An increase in airflow allowed higher degradation percentages in less time (COD: 65.77% and BOD: 85.41%). The kinetic parameters 'q = S', corresponds to the organic matter present in the medium, which cannot be metabolized by the microorganisms under operating conditions. The value of P = mu(max) was influenced by the transfer of pure oxygen, the value of theta(c)(M) (minimum cellular retention time) decreased from 22.42 h for air with a porous plate to 8.31 h for pure oxygen. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 0032-9592 UR - ISI:000175038300016 L2 - Aspergillus terreus;degradation;elimination rate;kinetics;olive-mill waste;WATER SO - Process Biochemistry 2002 ;37(10):1169-1176 5727 UI - 10382 AU - Hribar B AU - Vlachy V AU - Pizio O AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Ljubljana, Fac Chem & Chem Technol, Ljubljana 1000, SloveniaPizio, O, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Chemical potential of electrolytes adsorbed in porous media with charged obstacles: application of the continuum replica methodology AB - A theoretical study is reported of a quenched-annealed system where both components were modelled as size symmetric +1 : -1 primitive model electrolytes. The partly quenched system was studied by using the replica Ornstein-Zernike (ROZ) integral equation theory in the hypernetted chain (HNC) approximation and grand canonical Monte Carlo (GCMC) simulations. The primary interest was the excess Gibbs free energy (logarithm of the mean activity coefficient) of the adsorbed electrolyte and an expression for this quantity, valid within the ROZ/HNC formalism, was derived. The effects of the concentration of matrix ions, prequenching conditions, and the electrolyte and solvent conditions (concentration, temperature, dielectric constant) on the structure and thermodynamics of the adsorbed electrolyte were examined. The numerical results indicated that the mean activity of the adsorbed electrolyte differs substantially from the corresponding quantity for the bulk electrolyte. The excess chemical potential depends strongly on the concentration of charged obstacles and matrix preparation, and also on the temperature and dielectric constant of the annealed electrolyte solution. Newly generated computer simulation results for the structural and thermodynamic parameters, obtained by the grand canonical Monte Carlo method, were used to assess the validity of the ROZ/HNC approximation. It was shown that the ROZ/HNC theory yields good agreement with the computer simulations MH - Mexico|Distrito Federal MH - Slovenia PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177615700006 L2 - ORNSTEIN-ZERNIKE EQUATIONS; ION-ION CORRELATIONS; INTEGRAL-EQUATION; BINARY-LIQUID; THERMODYNAMIC PROPERTIES; FLUID DISTRIBUTIONS; DISORDERED MATRICES; ARBITRARY MATRICES; HYPERNETTED-CHAIN; CRITICAL-DYNAMICS SO - Molecular Physics 2002 ;100(19):3093-3103 5728 UI - 9572 AU - Hu H AU - Hernandez-Avila M AD - Harvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAInst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca, Morelos, MexicoHu, H, Channing Labs, 181 Longwood Ave, Boston, MA 02115, USA TI - Invited commentary: Lead, bones, women, and pregnancy - The poison within? MH - Mexico|Morelos MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health U5 - J;Editorial Material AV - English IS - 0002-9262 UR - ISI:000179930500002 L2 - X-RAY-FLUORESCENCE; BLOOD LEAD; NATIONAL-HEALTH; PLASMA; BURDEN; DETERMINANTS; HYPERTENSION; ABSORPTION; RETENTION; CHILDREN SO - American Journal of Epidemiology 2002 ;156(12):1088-1091 5729 UI - 11949 AU - Huang FY AU - Xiu QP AU - Sun JN AU - Hong E AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoBeijing Univ Chinese Med, Dept Pharmacol, Beijing, Peoples R ChinaHuang, FY, IPN, CINVESTAV, Dept Farmacobiol, Calz Tenorios 235, Mexico City 14330, DF, Mexico TI - Anti-platelet and anti-thrombotic effects of triacetylshikimic acid in rats AB - Because shikimic acid is the key intermediate in the shikimate pathway in plants and microorganisms, shikimic acid and its derivatives have been described as herbicides and anti-microbial agents. Triacetylshikimic acid (TSA) is an acetylate derivative of shikimic acid. The possible anti-platelet activity and anti-thrombotic efficacy of TSA were evaluated and its effect on arachidonic acid (AA) metabolism and second messengers including cyclic adenosine monophosphate (CAMP) and cyclic guanosine monophosphate (cGMP) was evaluated. After oral pretreatment with TSA, adenosine diphosphate (ADP)-, collagen-, and AA-induced rat platelet aggregation was inhibited ex vivo in a dose-dependent manner. In an arteriovenous-shunt thrombosis model, oral administration of TSA resulted in a dose-dependent inhibition of thrombus growth. TSA markedly increased the CAMP level and showed no effect on the cGMP level in rat platelets. Also, no significant changes in ADP-induced thromboxane B-2 formation in rat platelets or 6-keto-prostaglandin F-1alpha production from the abdominal aorta were observed after oral administration of low and medium doses of TSA (12.5 and 50 mg/kg). Additionally, prothrombin time, activated partial thromboplastin time, and thrombin time were unchanged at effective anti-platelet doses of TSA. These results demonstrate that TSA exerts oral anti-platelet and anti-thrombotic efficacy without perturbation of systemic hemostasis in rats, which was partially concerned with the elevation of CAMP in platelets MH - Mexico|Distrito Federal MH - Peoples R China PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Cardiac & Cardiovascular Systems;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0160-2446 UR - ISI:000173401000013 L2 - cAMP;platelets;thrombosis;triacetylshkimic acid;SHIKIMATE METABOLITES; ANTIPLATELET THERAPY; RECEPTOR ANTAGONIST; CORONARY-ARTERIES; RANDOMIZED TRIAL; CLOPIDOGREL; ASPIRIN; BIOSYNTHESIS; TICLOPIDINE; AGGREGATION SO - Journal of Cardiovascular Pharmacology 2002 ;39(2):262-270 5730 UI - 9509 AU - Huang MH AU - Kartono F AU - Dunn B AU - Zink JI AD - Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoZink, JI, Univ Calif Los Angeles, Dept Chem & Biochem, 405 Hilgard Ave, Los Angeles, CA 90095 USA TI - Hexagonal to lamellar mesostructural changes in silicate films caused by organic additives AB - The presence of dopant molecules and cosolvents in the sols from which mesostructured silicate thin films are pulled can have profound influences on the resulting structure and long range order. Dopants are frequently desired in order to induce a function such as luminescence. An important luminescent molecule, carbazole, is very effective at converting the film mesophase from hexagonal to lamellar. A very small change in the mole ratio of carbazole to the structure-directing surfactant, from 0.41 to 0.44, causes a very abrupt change of the structure of CTAB-templated mesostructured silica from two-dimensional hexagonal to lamellar. A molecule with a very similar structure, fluorene, also affects the structure in a similar manner, but much higher concentrations are necessary and the final order is not as high. Molecules having similar functional groups (especially amine groups) but nonplanar structures show that both the shape and the presence of the amine group play a role in causing the structural change. Many luminescent molecules require cosolvents in order to incorporate them into the sol from which the films are pulled. The effects of cosolvents, especially THF and benzene, on the structures of the films are also studied. The reasons for the structural change from 2-d hexagonal to lamellar as the concentrations of these molecules are increased are discussed in terms of modifications in the effective shapes of the micelles, and subtle local effects on the hydrolysis and condensation reaction rates caused by the basic aromatic amine functional group MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000180016600038 L2 - GEL THIN-FILMS; MESOPOROUS SILICA SO - Chemistry of Materials 2002 ;14(12):5153-5162 5731 UI - 11936 AU - Hubacher D AU - Lara-Ricalde R AD - Family Hlth Int, Res Triangle Pk, NC 27709, USAInst Nacl Perinatol, Mexico City 11000, DF, MexicoHubacher, D, Family Hlth Int, POB 13950, Res Triangle Pk, NC 27709, USA TI - Copper intrauterine devices and tubal infertility among nulligravid women - Reply MH - Mexico|Distrito Federal MH - USA PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0028-4793 UR - ISI:000173545300018 SO - New England Journal of Medicine 2002 ;346(5):376-377 5732 UI - 9449 AU - Huczko A AU - Lange H AU - Cota-Sanchez G AU - Soucy G AD - Univ Warsaw, Dept Chem, PL-02093 Warsaw, PolandNatl Inst Nucl Res, Salazar, Edo Mex, MexicoUniv Sherbrooke, Dept Chem Engn, Sherbrooke, PQ J1K 2R1, CanadaHuczko, A, Univ Warsaw, Dept Chem, 1 Pasteur St, PL-02093 Warsaw, Poland TI - Plasma synthesis of nanocarbons AB - Nanocarbons (fullerenes, nanotubes, "carbon onions", encapsulates,...) are efficiently produced by using a sublimation of carbon-bearing materials followed by the condensation of a carbon gas. Due to the very high sublimation temperature of carbon (close to 4000 K) different thermal plasma techniques (e.g., arc and radio frequency discharges, laser excitation) have been successfully demonstrated for synthesis of gram quantities of these nanomaterials. Non-thermal plasmas have also been reviewed as a source of aligned elongated nanocarbons MH - Canada MH - Mexico|Estado De Mexico MH - Poland PB - NEW YORK: BEGELL HOUSE INC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1093-3611 UR - ISI:000180261000011 L2 - plasma;carbon;synthesis;fullerenes;nanotubes;CHEMICAL-VAPOR-DEPOSITION; CARBON NANOTUBE ELECTRODES; LASER-ABLATION; THERMAL PLASMA; FIELD-EMISSION; ROOM-TEMPERATURE; AMORPHOUS-CARBON; FULLERENES; C-60; NANOSTRUCTURES SO - High Temperature Material Processes 2002 ;6(3):369-384 5733 UI - 11421 AU - Huerta AM AU - Glasner JD AU - Gutierrez-Rios RM AU - Blattner FR AU - Collado-Vides J AD - UNAM, CIFN, Program Computat Genom, Cuernavaca 62100, Morelos, MexicoUniv Wisconsin, Genome Ctr, Madison, WI 53706, USAHuerta, AM, UNAM, CIFN, Program Computat Genom, AP 565-A, Cuernavaca 62100, Morelos, Mexico TI - GETools: gene expression tool for analysis of transcriptome experiments in E. coli AB - Microarray methods provide global evaluation of changes in gene expression that the cell uses to adapt to different conditions. Given the rich legacy of biological knowledge available for Escherichia coli, the analysis of microarray data poses the challenge of comparing them against the knowledge available in the literature and against computational predictions. Here we present Gene Expression Tools (GETools), a computational environment to analyze expression profiles in Escherichia coliK-12, evaluating their congruence with characterized transcription units, upstream regulatory signals and putative transcriptional factors MH - Mexico|Morelos MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 7 U4 - Genetics & Heredity U5 - J;Editorial Material AV - English IS - 0168-9525 UR - ISI:000174770300014 L2 - K-12 SO - Trends in Genetics 2002 ;18(4):217-218 5734 UI - 11448 AU - Huesca-Gomez C AU - Franco M AU - Luc G AU - Montano LF AU - Masso F AU - Posadas-Romero C AU - Perez-Mendez O AD - Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Mexico City 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Cellular Biol, Mexico City, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Endocrinol, Mexico City, DF, MexicoInst Pasteur, Dept Atherosclerosis, F-59019 Lille, FranceInst Pasteur, INSERM, UR545, F-59019 Lille, FrancePerez-Mendez, O, Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Juan Badiano 1,Secc 16, Mexico City 14080, DF, Mexico TI - Chronic hypothyroidism induces abnormal structure of high-density lipoproteins and impaired kinetics of apolipoprotein A-I in the rat AB - Abnormal levels of plasma high-density lipoproteins (HDL) commonly reflect altered metabolism of the major HDL-apolipoprotein A-I (apo A-I) It is well known that thyroid hormones are involved in the regulation of lipoprotein metabolism, inducing significant, changes in the concentration, size, and composition of plasma HDL. The purpose of this study was to evaluate the mechanisms responsible of the decreased HDL-apo A-I in chronic thyroidectomized rats (Htx) and to assess the role of HDL structure in apo A-I turnover. Htx: rats were found to have a 3-fold increase in low-density lipoprotein-cholesterol (LDL-C), whereas HDL-C and apo A-I showed a 25.9% and 22.6% decrease compared to controls (P <.05), thus suggesting a defect in HDL metabolism. Turnover studies of apo A-I incorporated into normal HDL, using exogenous I-125-radiolabeling, confirmed an altered fractional catabolic rate (FCR) in Htx rats (0.097 +/- 0.009 d(-1) v 0.154 +/- 0.026 d(-1) for Htx and control rats, respectively, P <.005). Apo A-I production rates calculated with autologous HDL data showed that apo A-I synthesis was decreased to a higher extent than the already reduced apo A-I catabolism, thus explaining the low apo A-1 plasma levels in Htx: rats. Composition analysis of HDL-Htx revealed increased phospholipid and apo E content, whereas apo A-IV was diminished. Such structural changes contribute to the reduced apo A-I catabolism as demonstrated with further kinetic turnover studies in normal rats treated with I-125-radiolabeled apo A-1 reincorporated into HDL isolated from plasma of Htx rats (FCR, 0.102 +/- 0.017 v 0.154 +/- 0.026 d(-1), for Htx: and normal rats, respectively, P <.005). In summary, chronic hypothyroidism in rat a species that lacks cholesteryl ester transfer protein (CETP) activity is characterized by low HDL-C and apo A-I plasma levels as a result of a low apo A-1 production rate that exceeds a decreased FCR. Both structural abnormalities of HDL and changes induced in the animal that affect HDL catabolism contribute to the low FCR of apo A4 in the hypothyroid state. Copyright 2002, Elsevier Science (USA). All rights reserved MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 10 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0026-0495 UR - ISI:000174820900009 L2 - CHOLESTERYL ESTER TRANSFER; PHOSPHOLIPID TRANSFER PROTEIN; THYROID-HORMONE; GENE-EXPRESSION; PLASMA-LIPOPROTEINS; NONHUMAN-PRIMATES; HEPATIC LIPASE; RECEPTOR GENE; METABOLISM; LIVER SO - Metabolism-Clinical and Experimental 2002 ;51(4):443-450 5735 UI - 10162 AU - Hughes DH AU - Aretxaga I AU - Chapin EL AU - Gaztanaga E AU - Dunlop JS AU - Devlin MJ AU - Halpern M AU - Gundersen J AU - Klein J AU - Netterfield CB AU - Olmi L AU - Scott D AU - Tucker G AU - Rowan-Robinson M AD - INAOE, Puebla, MexicoCSIC, IEEC, ES-08034 Barcelona, SpainUniv Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Penn, Dept Phys & Astron, Philadelphia, PA 19104, USAUniv British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, CanadaUniv Miami, Dept Phys, Coral Gables, FL 33416, USAUniv Toronto, Dept Astron, Toronto, ON MSS 1A1, CanadaUniv Puerto Rico, Dept Phys, Rio Piedras, PR 00931, USAUniv British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, CanadaBrown Univ, Dept Phys, Providence, RI 02912, USAHughes, DH, INAOE, Aptdo Postal 51 & 216, Puebla, Mexico TI - Breaking the 'redshift deadlock' - I. Constraining the star formation history of galaxies with submillimetre photometric redshifts AB - Future extragalactic submillimetre and millimetre surveys have the potential to provide a sensitive census of the level of obscured star formation in galaxies at all redshifts. While in general there is good agreement between the source counts from existing Submillimetre Common User Bolometer Array (SCUBA; 850-mum) and Max Planck Millimetre Bolometer Array (MAMBO; 1.25-mm) surveys of different depths and areas, it remains difficult to determine the redshift distribution and bolometric luminosities of the submillimetre and millimetre galaxy population. This is principally due to the ambiguity in identifying an individual submillimetre source with its optical, IR or radio counterpart which, in turn, prevents a confident measurement of the spectroscopic redshift. Additionally, the lack of data measuring the rest-frame FIR spectral peak of the submillimetre galaxies gives rise to poor constraints on their rest-frame FIR luminosities and star formation rates. In this paper we describe Monte Carlo simulations of ground-based, balloon-borne and satellite submillimetre surveys that demonstrate how the rest-frame FIR-submillimetre spectral energy distributions (250-850 mum) can be used to derive photometric redshifts with an rms accuracy of +/-0.4 over the range 0 < z < 6. This opportunity to break the redshift deadlock will provide an estimate of the global star formation history for luminous optically obscured galaxies (L-FIR > 3 x 10(12) L.) with an accuracy of similar to20 per cent MH - Canada MH - Mexico|Puebla MH - United Kingdom MH - Spain MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000178284000007 L2 - surveys;galaxies : evolution;galaxies : formation;galaxies : high-redshift;cosmology : observations;submillimetre;HUBBLE DEEP FIELD; STARBURST GALAXIES; SCUBA-8-MJY SURVEY; FORMING GALAXIES; SPECTRAL INDEX; SOURCE COUNTS; IDENTIFICATION; EVOLUTION; INDICATOR; SCUBA SO - Monthly Notices of the Royal Astronomical Society 2002 ;335(4):871-882 5736 UI - 12033 AU - Huilgol RR AU - Mena B AU - Piau JM AD - Flinders Univ S Australia, Sch Informat & Engn, Adelaide, SA 5001, AustraliaNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoLab Rheol, F-38041 Grenoble, FranceHuilgol, RR, Flinders Univ S Australia, Sch Informat & Engn, GPO Box 2100, Adelaide, SA 5001, Australia TI - Finite stopping time problems and rheometry of Bingham fluids AB - It is shown that steady channel, simple shear and Couette flows of a Bingham fluid come to rest in a finite amount of time, if either the applied pressure falls below a critical value, or the moving boundaries are brought to rest. An explicit formula for a bound on the finite stopping time in each case is derived. This bound depends on the density, the viscosity, the yield stress, a new geometric constant, and the least eigenvalue of the second order linear differential operator for the interval under consideration. (C) 2002 Elsevier Science B.V. All rights reserved MH - Australia MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Mechanics U5 - J;Article AV - English IS - 0377-0257 UR - ISI:000173149800005 L2 - bingham fluid;rheometry;variational inequality;finite stopping time;YIELD-STRESS FLUID; VARIATIONAL-INEQUALITIES; FLOWS SO - Journal of Non-Newtonian Fluid Mechanics 2002 ;102(1):97-107 5737 UI - 11661 AU - Hunt ML AU - Zenit R AU - Campbell CS AU - Brennen CE AD - CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125, USANatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv So Calif, Dept Mech Engn, Los Angeles, CA 90089, USAHunt, ML, CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125, USA TI - Revisiting the 1954 suspension experiments of R. A. Bagnold AB - In 1954 R. A. Bagnold published his seminal findings on the theological properties of a liquid-solid suspension. Although this work has been cited extensively over the last fifty years, there has not been a critical review of the experiments. The purpose of this study is to examine the work and to suggest an alternative reason for the experimental findings. The concentric cylinder rheometer was designed to measure simultaneously the shear and normal forces for a wide range of solid concentrations, fluid viscosities and shear rates. As presented by Bagnold, the analysis and experiments demonstrated that the shear and normal forces depended linearly on the shear rate in the 'macro-viscous regime; as the grain-to-grain interactions increased in the 'grain-inertia' regime, the stresses depended on the square of the shear rate and were independent of the fluid viscosity. These results, however, appear to be dictated by the design of the experimental facility. In Bagnold's experiments, the height (h) of the rheometer was relatively short compared to the spacing (t) between the rotating outer and stationary inner cylinder (h/t = 4.6). Since the top and bottom end plates rotated with the outer cylinder, the flow contained two axisymmetric counter-rotating cells in which flow moved outward along the end plates and inward through the central region of the annulus. At higher Reynolds numbers, these cells contributed significantly to the measured torque, as demonstrated by comparing Bagnold's pure-fluid measurements with studies on laminar-to-turbulent transitions that pre-date the 1954 study. By accounting for the torque along the end walls, Bagnold's shear stress measurements can be estimated by modelling the liquid-solid mixture as a Newtonian fluid with a corrected viscosity that depends on the solids concentration. An analysis of the normal stress measurements was problematic because the gross measurements were not reported and could not be obtained MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 25 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000174197200001 L2 - SHEAR; TRANSPORT; STRESS; WATER; RATES; FLOWS SO - Journal of Fluid Mechanics 2002 ;452():1-24 5738 UI - 11699 AU - Hupp D AU - Frankenburg A AU - Bartel P AU - Roberts G AD - BP Explorat Inc, Anchorage, AK, USABP Explorat Co Ltd, Gulf of Mexico, MexicoHupp, D, Schlumberger, Anchorage, AK, USA TI - Gas shutoff evaluation and implementation, North Slope, Alaska AB - Oil production on Alaska's North Slope has been limited as a result of gas production and the ensuing gas handling-facility constraints. Diagnosis of gas production problems is complicated by the fact that many of the wells are high-angle or horizontal. This paper presents case studies in the diagnosis and treatment of excess gas production in three horizontal oil wells located on the North Slope of Alaska. Candidate wells for gas shutoff (GSO) were identified based on gas flow rates and the gas/oil ratio (GOR). Wells that were not commercially producible were selected for evaluation as potential GSO wells. These wells were assessed with new-technology logging tools conveyed on coiled tubing or with a downhole tractor. The new production-logging technology provided direct gas and oil holdup measurements, allowing for interpretation of three-phase production in the horizontal well environments. The goal was to identify dry-gas production (i.e., gas production without associated oil production). After dry-gas production was identified, GSO procedures were designed based on the location of the gas entry into the wellbore. Two of the case studies involved GSO from the toe of the horizontal section of the wells, which was accomplished by placing a cast-iron bridge plug on coiled tubing above the gas-producing perforations. The third case study identified dry-gas production from the top perforated interval. This GSO involved setting a plug below the gas-producing perforations and squeezing them off. The plug was then drilled out with coiled tubing and pushed to total depth (TD). These techniques proved to be economical GSO solutions in difficult well environments, and each case resulted in significant reduction of free gas and increased oil production MH - Mexico|Gulf of Mexico MH - USA PB - RICHARDSON: SOC PETROLEUM ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Petroleum U5 - J;Article AV - English IS - 1064-668X UR - ISI:000174004800001 SO - Spe Production & Facilities 2002 ;17(1):4-10 5739 UI - 9484 AU - Hurrell R AU - Bothwell T AU - Cook JD AU - Dary O AU - Davidsson L AU - Fairweather-Tait S AU - Hallberg L AU - Lynch S AU - Rosado J AU - Walter T AU - Whittaker P AD - Swiss Fed Inst Technol, Zurich, SwitzerlandUniv Witwatersrand, Johannesburg, South AfricaUniv Kansas, Med Ctr, Kansas City, KS 66103, USAMOST, Micronutrient, USAID Program, Arlington, VA USAInst Food Res, Norwich NR4 7UA, Norfolk, EnglandUniv Gothenburg, Gothenburg, SwedenEastern Virginia Med Sch, Norfolk, VA 23501, USAInst Med Sci & Nutr, Mexico City, DF, MexicoInst Nutr & Food Technol, Santiago, ChileUS FDA, Washington, DC 20204, USAHurrell, R, Swiss Fed Inst Technol, Zurich, Switzerland TI - The usefulness of elemental iron for cereal flour fortification: A SUSTAIN task force report AB - Fortification of cereal flours may be a useful public health strategy to combat iron deficiency. Cereal flours that are used shortly after production (e.g., baking flour) can be fortified with soluble iron compounds, such as ferrous sulfate, whereas the majority of flours stored for longer periods is usually fortified with elemental iron powders to avoid unacceptable sensory changes. Elemental iron powders are less well absorbed than soluble iron compounds and they vary widely in their absorption depending on manufacturing method and physicochemical characteristics. Costs vary with powder type, but elemental iron powders are generally less expensive than ferrous sulfate. This review evaluates the usefulness of the different elemental iron powders based on results from in vitro studies, rat assays, human bioavailability studies, and efficacy studies monitoring iron status in human subjects. It concludes that, at the present time, only electrolytic iron powder can be recommended as an iron fortificant. Because it is only approximately half as well absorbed as ferrous sulfate, it should be added to provide double the amount of iron MH - Chile MH - United Kingdom MH - Mexico|Distrito Federal MH - South Africa MH - Sweden MH - Switzerland MH - USA PB - LAWRENCE: INT LIFE SCIENCES INST RP - NOT IN FILE U3 - TC 34 U4 - Nutrition & Dietetics U5 - J;Review AV - English IS - 0029-6643 UR - ISI:000180148500001 L2 - elemental iron;iron bioavailability;cereal fortification;wheat flour fortification;DEFICIENCY ANEMIA; INFANT CEREALS; CARBONYL IRON; NUTRITIONAL-ANEMIA; BIOAVAILABILITY; ABSORPTION; FOODS; PRODUCTIVITY; INDONESIA; PREGNANCY SO - Nutrition Reviews 2002 ;60(12):391-406 5740 UI - 9420 AU - Huu-Tai PC AU - Frank A AU - Smirnova NA AU - Van Isacker P AD - Grand Accelerateur Natl Ions Lourds, F-14076 Caen 5, FranceUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Louvain, Inst Kern Stralingsfys, B-3001 Heverlee, BelgiumHuu-Tai, PC, Grand Accelerateur Natl Ions Lourds, Boite Postale 55027, F-14076 Caen 5, France TI - Geometry of random interactions AB - It is argued that spectral features of quantal systems with random interactions can be given a geometric interpretation. This conjecture is investigated in the context of two simple models: a system of randomly interacting d bosons and one of randomly interacting fermions in a j=7/2 shell. In both examples the probability for a given state to become the ground state is shown to be related to a geometric property of a polygon or polyhedron which is entirely determined by particle number, shell size, and symmetry character of the states. The extensions to more general situations are discussed MH - Belgium MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000180279900003 L2 - GROUND-STATES; SPECTRA SO - Physical Review C 2002 ;66(6): 5741 UI - 10757 AU - ias-Salinas R AU - Fair JR AD - Univ Texas, Seperat Res Program, Austin, TX 78712, USAMacias-Salinas, R, Inst Politecn Nacl, ESIQIE, UPALM, Zacatenco 07738, DF, Mexico TI - Axial mixing effects in packed gas-liquid contactors AB - The usual assumption of plug flow of gas and liquid in packed columns may not be correct in many instances. If there is departure from this ideal flow case, then the driving force for mass transfer is diminished, and allowance must be made for additional packed height if the specified separation is to be made. On the basis of our earlier experimental work, we present here the methodology for making the nonideal flow correction and show examples of how the correction can have a significant impact on the separating capability of the contactor. In particular, newer high-efficiency packings are included in the study, specifically "through-flow" rings and strucured packings of both the gauze and sheet-metal types MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000176752200012 L2 - MODERN PACKINGS; PHASES; FLOW SO - Industrial & Engineering Chemistry Research 2002 ;41(14):3429-3435 5742 UI - 10493 AU - ias-Silva M AU - Li W AU - Leu JI AU - Crissey MAS AU - Taub R AD - Univ Penn, Sch Med, Dept Genet, Philadelphia, PA 19104, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoTaub, R, Bristol Myers Squibb Co, Rte 141 & Clay Rd,Expt Stn 400,Rm 2418, Wilmington, DE 19880 USA TI - Up-regulated transcriptional repressors SnoN and Ski bind Smad proteins to antagonize transforming growth factor-beta signals during liver regeneration AB - Transforming growth factor-beta (TGF-beta) functions as an antiproliferative factor for hepatocytes. However, for unexplained reasons, hepatocytes become resistant to TGF-beta signals and can proliferate despite the presence of TGF-beta during liver regeneration. TGF-beta is up-regulated during liver regeneration, although it is not known whether it is active or latent. TGF-beta activity may be examined by assessing Smad activation, a downstream signaling pathway. Smad pathway activation during liver regeneration induced by partial hepatectomy or CCl4 injury was examined by assessing the levels of phospho-Smad2 and Smad2-Smad4 complexes . We found that Smad proteins were slightly activated in quiescent liver, but that their activation was further enhanced in regenerating liver. Interestingly, TGF-beta/Smad pathway inhibitors (SnoN and Ski) were up-regulated during regeneration, and notably, SnoN was induced mainly in hepatocytes. SnoN and Ski are transcriptional repressors that may render some cells resistant to TGF-beta via binding Smad proteins. Complexes between SnoN, Ski, and the activated Smad proteins were detected from 2 to 120 h during the major proliferative phase in regenerating liver. Inhibitory complexes decreased after liver mass restitution (5-15 days), suggesting that persistently activated Smad proteins might participate in returning the liver to a quiescent state. Our data show that active TGF-beta/Smad signals are present during regeneration and suggest that SnoN/Ski induction might explain hepatocyte resistance to TGF-beta during the proliferative phase MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000177342600019 L2 - MESSENGER-RNA EXPRESSION; TGF-BETA; RAT-LIVER; DNA-SYNTHESIS; INTERLEUKIN-6-DEFICIENT MICE; PARTIAL-HEPATECTOMY; CO-REPRESSOR; IN-VIVO; RECEPTOR; HEPATOCYTES SO - Journal of Biological Chemistry 2002 ;277(32):28483-28490 5743 UI - 9692 AU - Ibanez C AU - Juste J AU - Lopez-Wilchis R AU - Albuja L AU - Nunez-Garduo A AD - CSIC, Estac Biol Donana, E-41080 Seville, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Biol, Mexico City 09340, DF, MexicoEscuela Politec Nacl, Dept Ciencias Biol, Quito, EcuadorUniv Michoacana, Fac Biol, Morelia 58040, Michoacan, MexicoIbanez, C, CSIC, Estac Biol Donana, Apartado 1056, E-41080 Seville, Spain TI - Echolocation of three species of sac-winged bats (Balantiopteryx) AB - We describe and compare field recordings of echolocation calls of the neotropical emballonurid sac-winged bats Balantiopteryx plicata, B. io, and B. infusca. These 3 species have search-phase calls with principal energy in the 2nd harmonic, characterized by a long narrowband component followed by a short broadband component. Variation in call parameters follows only partially the scaling pattern with body size generally found in bats. Based on characteristics of their echolocation calls, we hypothesize that B. io and B. infusca forage in more cluttered habitats than does the congeneric B. plicata, which typically hunts in open areas MH - Ecuador MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000179583200014 L2 - Balantiopteryx;bats;body size;echolocation;emballonuridae;habitat;ATMOSPHERIC ATTENUATION; EMBALLONURID BATS; NEOTROPICAL BATS; BEHAVIOR; CALLS; PIPISTRELLUS; FREQUENCIES; PLASTICITY; ECOLOGY; SIGNALS SO - Journal of Mammalogy 2002 ;83(4):1049-1057 5744 UI - 11883 AU - Ibarra-Alvarado C AU - Galle J AU - Melichar VO AU - Mameghani A AU - Schmidt HHHW AD - Univ Giessen, Rudolf Buchheim Inst Pharmakol, D-35392 Giessen, GermanyUniv Wurzburg, Dept Pharmacol & Toxicol, Wurzburg, GermanyUniv Wurzburg, Dept Med Nephrol, Wurzburg, GermanyUniv Queretaro, Fac Chem, Ctr Univ, Queretaro, MexicoIbarra-Alvarado, C, Univ Giessen, Rudolf Buchheim Inst Pharmakol, Frankfurter Str 107, D-35392 Giessen, Germany TI - Phosphorylation of blood vessel vasodilator-stimulated phosphoprotein at serine 239 as a functional biochemical marker of endothelial nitric oxide/cyclic GMP signaling AB - The endothelium-derived relaxing factors nitric oxide (NO) and prostacyclin (PGI(2)) are important antithrombotic, relaxant, and anti proliferative agents of the blood vessel wall that exert their intracellular effects primarily via cGMP- and cAMP-dependent protein kinases (cGK, cAK). However, no biochemical marker for their activity in the intact blood vessel is available except for transient increases in the concentration of cGMP and cAMP. Using Western blot analysis and specific antibodies, we show here that phosphorylation of the vasodilator-stimulated phosphoprotein (VASP) at Ser239 (P-Ser239-VASP) in rabbit aorta was detectable only in segments with an intact endothelium, although at least one third of VASP is contained in the remaining vascular wall. In endothelium-denuded aorta, VASP phosphorylation was increased by the NO donor sodium nitroprusside (SNP). Levels Of P-Ser239-VASP, in the presence of endothelium and either SNP or 8-bromo-cAMP, were maximal. VASP phosphorylation elicited by 8-bromo-cAMP was inhibited significantly by the cGK inhibitor Rp-8-Br-PET-cGMPS. Stimulated P-Ser239-VASP formation was fully reversible, reaching basal levels after 10 min of repeated washouts. Consistent with the important role that the NO/cGMP pathway plays in the formation of P-Ser239-VASP in rabbit aorta, inhibition of NO synthase by N-omega-nitro-L-arginine methyl ester (L-NAME; 1 mM) or of soluble guanylyl cyclase by 1H-[1,2,4]oxadiazolo[3,4-a]quinoxalin-1-one (ODQ; 50 muM) almost completely abolished P-Ser239-VASP formation in endothelium intact blood vessels. These data suggest that vascular P-Ser239-VASP is primarily regulated by the NO/cGMP pathway and may thus serve as a biochemical marker for the activity state of this essential pathway in endothelial function MH - Germany MH - Mexico|Queretaro PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 15 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0026-895X UR - ISI:000173518400009 L2 - DEPENDENT PROTEIN-KINASE; INTACT HUMAN PLATELETS; VASP IN-VITRO; SMOOTH-MUSCLE; CAMP; ADHESION; CELLS; AGGREGATION; INHIBITION; EXPRESSION SO - Molecular Pharmacology 2002 ;61(2):312-319 5745 UI - 11531 AU - Ibarra C AU - Muller H AU - Nedvetsky PI AU - Lohmann S AU - Feil R AU - Hofmann F AU - Schmidt HHHW AD - Univ Giessen, Rudolf Buchheim Inst Pharmakol, D-6300 Giessen, GermanyUniv Wurzburg, Med Klin, Dept Clin Biochem & Pathobiochem, D-8700 Wurzburg, GermanyTech Univ Munich, Inst Pharmacol & Toxicol, D-8000 Munich, GermanyUniv Queretaro, Fac Chem, Queretaro, Mexico TI - NO down-regulates expression of its receptor, soluble guanylyl cyclase, in a cGMP-independent manner in vascular endothelial cells MH - Germany MH - Mexico|Queretaro PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0007-1188 UR - ISI:000174541900149 SO - British Journal of Pharmacology 2002 ;135(): 5746 UI - 9946 AU - Ilchenko L AU - Grimalsky V AU - Koshevaya S AU - Burlak G AD - Natl Inst Astrophys Opt & Elect, Puebla 72000, Pue, MexicoKiev Natl Univ, Radiophys Fac, UA-02137 Kiev, UkraineAutunomous Univ Morelos, Cuernavaca 62210, Morelos, MexicoGrimalsky, V, Natl Inst Astrophys Opt & Elect, Puebla 72000, Pue, Mexico TI - Dynamic regimes of three-wave interaction of ultrasonic beams in TeO2 AB - Results of experimental and theoretical investigations of dynamic phenomena, which occur under the three-wave resonant interaction of ultrasonic beams in a crystal TeO2, are presented. The interacting waves are fast longitudinal ultrasonic wave (pump, its frequency is 100-1000 MHz) and two slow co- and counter-propagating transverse ones. When the input intensity of the pump wave exceeds similar to5 times the threshold of parametric generation, a complex spatial-temporal dynamics is observed, both regular and chaotic. The resonant three-wave interaction has been simulated by means of solving coupled equations for slowly varying amplitudes of interacting waves, when a transverse inhomogeneity has been taken into account. The spatial-temporal distributions of wave amplitudes within the crystal are complex in all directions and they qualitatively describe the experimental data. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000178879900011 L2 - three-wave interaction;ultrasonic beams;diffraction;dynamic regimes SO - Physics Letters A 2002 ;303(2-3):169-178 5747 UI - 10603 AU - Imaz A AU - Hernandez MA AU - Arino AH AU - Armendariz I AU - Jordana R AD - Univ Navarra, Dept Zool & Ecol, E-31080 Pamplona, SpainUniv Tamaulipas, Unidad Acad Multidisciplinaria Agron & Ciencias, Mexico City 87000, DF, MexicoImaz, A, Univ Navarra, Dept Zool & Ecol, E-31080 Pamplona, Spain TI - Diversity of soil nematodes across a Mediterranean ecotone AB - As an indicator of ecological maturity, we have analyzed the nematode community of an erosion-prone Mediterranean macchia and a pine stand within it. Species richness, abundance, diversity and maturity indexes have been measured from a number of standardized soil samples taken along parallel transects laid across the boundary between the pine stand and the macchia. Results of multifactor analysis on these data show three distinct nematode communities of different species composition. The intermediate nematode community (ecotone) is not a mixture of elements of adjacent communities (pine stand and macchia), thus suggesting the existence of an ecotone-specific community beyond the expected boundary effect. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Soil Science U5 - J;Article AV - English IS - 0929-1393 UR - ISI:000177124100003 L2 - ecotone;nematode;diversity;boundary effect;desertification;Mediterranean region;MATURITY INDEX; FOREST SOIL; COMMUNITIES; EXTRACTION; VEGETATION; PASTURE; SPAIN; PINE SO - Applied Soil Ecology 2002 ;20(3):191-198 5748 UI - 12036 AU - Inoue MB AU - Inoue M AU - Fernando Q AU - Valcic S AU - Timmermann BN AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoUniv Arizona, Coll Pharm, Dept Pharmacol & Toxicol, Tucson, AZ 85721, USAInoue, MB, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - Potentiometric and H-1 NMR studies of complexation of Al3+ with (-)-epigallocatechin gallate, a major active constituent of green tea AB - The acid dissociation of (-)-epigallocatechin gallate (abbreviated as egcg) and its complexation with Al3+ were studied by potentiometric titrations, and were compared with those of (-)-epicatechin (ec) and (-)-epigallocatechin (egc). In Al3+ ec and Al3+ -egc reaction systems, [Al(LH-2)](+), [Al(LH-2)(OH)](0), and [Al(LH-2)(2)](-) are formed, as reported for Al3+-catechin (c). Reactions between Al3+ and egcg at pH <4.1 yield AlLH-2 and AlLH-3 species. The H-1 NMR studies have shown that two hydroxyl groups of the gallate (D) ring are deprotonated and coordinated to an Al3+ ion in [Al(egcgH(-2))](+). The AlLH-3 species of egcg is supposed to be formulated as [Al(egcgH(-3))](0) in which one hydroxyl group of the pyrogallol (B) ring and two hydroxyl groups of the D ring are deprotonated; an Al3+ ion is coordinated to two oxygen atoms of the D ring and one oxygen atom from the B ring of the neighboring chelate molecule, resulting in the formation of a polymeric structure. In the Al3+ complex of egcg, the gallate group forms major coordinate bonds and results in solution properties that are different from those of ec, egc and c which have no gallate group. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0162-0134 UR - ISI:000173121000002 L2 - aluminum complexes;catechins;formation constants;NMR;ALUMINUM; INHIBITION; IRON(III); CATECHINS SO - Journal of Inorganic Biochemistry 2002 ;88(1):7-13 5749 UI - 10809 AU - Insuasty B AU - Fernandez F AU - Quiroga J AU - Martinez R AU - Gavino R AU - Angeles E AD - Univ Valle, Dept Quim, Grp Invest Compuestos Heterociclicos, Cali, ColombiaUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Estuios Super Cuautitlan, Lab Quim Med, Cuautitlan, Estado de Mexic, MexicoInsuasty, B, Univ Valle, Dept Quim, Grp Invest Compuestos Heterociclicos, Valle AA 25360, Cali, Colombia TI - Reaction of 1,2-diaminobenzimidazole with 1-aryl-2-bromo-3-phenylpropanone. Synthesis of 2-aryl-3-benzyl-9-aminoimidazo[1,2-a]benzimidazoles AB - The reaction of 1.2-diaminobenzimidazole 1 with one equivalent of 1-aryl-2-bromo-3phenylpropanones 2. in methanol. leads to the formation of 2-Aryl-3-benzyl-9-aminoimidazo[1.2a]benzimidazoles 3. The structure elucidation of the products is based on detail nmr analysis of experiments such as H-1.COSY. NOESY.C-13. DEPT. HETCOR and COLOC MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0793-0283 UR - ISI:000176533700007 SO - Heterocyclic Communications 2002 ;8(2):151-156 5750 UI - 11003 AU - Islas-Flores I AU - Corrales-Villamar S AU - Bearer E AU - Raya JC AU - Villanueva MA AD - UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62250, Morelos, MexicoCtr Invest Cient Yucatan, Meridan 97200, Yucatan, MexicoBrown Univ, Dept Pathol & Lab Med, Providence, RI 02912, USAVillanueva, MA, UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Isolation of lipoxygenase isoforms from Glycine max embryo axes based on apparent cross-reactivity with anti-myosin antibodies AB - Three lipoxygenase isoforms were isolated from Glycine max embryo axes. A number of proteins a-round 97 kDa cross-reacted with several anti-actin and anti-myosin antibodies and these were used to follow their purification through gel filtration, hydroxyapatite and anion exchange columns. The 97-kDa cross-reactive material eluted in the unbound fractions of the last anion exchange column, and displayed two components of pGammas 6.2 and 6.3. Further phase partition of this fraction in TX-114 yielded a hydrophobic 97 kDa protein. Additionally, a 95-kDa protein was retained and eluted from this last column. Partial peptide sequences indicated that the 95 kDa protein was soybean lipoxygenase-1, the first 97 kDa protein was lypoxygenase-3, and the hydrophobic 97 kDa protein was lipoxygenase-2. Several possible reasons for the cross-reactivity with the antibodies are discussed. To our knowledge, this is the first example of individual lipoxygenase isoforms isolated from soybean embryo axes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0304-4165 UR - ISI:000176058800008 L2 - embryo;lipoxidase;lipoxygenase;purification;seed;Glycine max;PROTEINS SO - Biochimica et Biophysica Acta-General Subjects 2002 ;1571(1):64-70 5751 UI - 10813 AU - Iturbide-Sanchez F AU - Jardon-Aguilar H AU - Tirado-Mendez JA AD - Univ Massachusetts, Dept Elect Engn, Lab Millimeter Wave Devices & Applicat, Amherst, MA 01003, USANatl Polytech Inst, Ctr Res & Adv Studies, Telecommun Sect, Mexico City 07000, DF, MexicoIturbide-Sanchez, F, Univ Massachusetts, Dept Elect Engn, Lab Millimeter Wave Devices & Applicat, Amherst, MA 01003 USA TI - Comparison of different high-linear LNA structures for PCS applications using SiGeHBT and low bias voltage AB - Different high-linear low noise amplifier (LNA) structures have been designed, simulated and compared, providing good performance results concerning noise figure, bandwidth, power gain, intermodulation and gain compression, when a low-level voltage supply is used. The structures were designed to be used in personal communication systems (PCSs), operating at 1900 MHz using a SiGe heterojunction bipolar transistor (HBT) and 2.4 V bias polarisation MH - USA MH - Mexico|Distrito Federal PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000176632000002 SO - Electronics Letters 2002 ;38(12):536-538 5752 UI - 11195 AU - Iturriaga R AD - CIMAT, Guanajuato 36000, MexicoUniv Cambridge, I Newton Inst, Cambridge CB2 1TN, EnglandIturriaga, R, CIMAT, AP 402, Guanajuato 36000, Mexico TI - A geometric proof of the existence of the green bundles AB - We give a new proof of the existence of the Green bundles MH - United Kingdom MH - Mexico|Guanajuato PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000175300300018 L2 - CONJUGATE-POINTS; ENTROPY SO - Proceedings of the American Mathematical Society 2002 ;130(8):2311-2312 5753 UI - 9792 AU - Ivison RJ AU - Greve TR AU - Smail I AU - Dunlop JS AU - Roche ND AU - Scott SE AU - Page MJ AU - Stevens JA AU - Almaini O AU - Blain AW AU - Willott CJ AU - Fox MJ AU - Gilbank DG AU - Serjeant S AU - Hughes DH AD - Royal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, ScotlandRoyal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Durham, Dept Phys, Durham DH1 3LE, EnglandUniv Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, EnglandCALTECH, Dept Astron, Pasadena, CA 91125, USAUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandBlackett Lab, Astrophys Grp, London SW7 2BW, EnglandUniv Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NZ, Kent, EnglandInst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoIvison, RJ, Royal Observ, Astron Technol Ctr, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - Deep radio imaging of the SCUBA 8-mJy survey fields: submillimetre source identifications and redshift distribution AB - The SCUBA 8-mJy survey is the largest submillimetre (submm) extragalactic mapping survey undertaken to date, covering 260 arcmin(2) to a 4sigma detection limit of similar or equal to8 mJy at 850 mum, centred on the Lockman Hole and ELAIS N2 regions. Here, we present the results of new 1.4-GHz imaging of these fields, of the depth and resolution necessary to reliably identify radio counterparts for 18 of 30 submm sources, with possible detections of a further 25 per cent. Armed with this greatly improved positional information, we present and analyse new optical, near-infrared (near-IR) and XMM Newton X-ray imaging to identify optical/IR host galaxies to half of the submm-selected sources in those fields. As many as 15 per cent of the submm sources detected at 1.4 GHz are resolved by the 1.4-arcsec beam and a further 25 per cent have more than one radio counterpart, suggesting that radio and submm emission arise from extended starbursts and that interactions are common. We note that less than a quarter of the submm-selected sample would have been recovered by targeting optically faint radio sources, underlining the selective nature of such surveys. At least 60 per cent of the radio-confirmed optical/IR host galaxies appear to be morphologically distorted; many are composite systems - red galaxies with relatively blue companions; just over one half are found to be very red (I - K > 3.3) or extremely red (I - K > 4); contrary to popular belief, most are sufficiently bright to be tackled with spectrographs on 8-m telescopes. We find one submm source which is associated with the steep-spectrum lobe of a radio galaxy, at least two more with flatter radio spectra typical of radio-loud active galactic nuclei (AGN), one of them variable. The latter is amongst four sources (=15 per cent of the full sample) with X-ray emission consistent with obscured AGN, though the AGN would need to be Compton thick to power the observed far-IR luminosity. We exploit our well-matched radio and submm data to estimate the median redshift of the S-850 mum similar to8 mJy submm galaxy population. If the radio/far-IR correlation holds at high redshift, and our sample is unbiased, we derive a conservative limit of (z) greater than or equal to2.0, or greater than or equal to2.4 using spectral templates more representative of known submm galaxies MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 139 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0035-8711 UR - ISI:000179273700001 L2 - galaxies : formation;galaxies : starburst;cosmology : observations;early Universe;STAR-FORMATION HISTORY; ULTRAVIOLET LUMINOSITY DENSITY; GALAXY SMM J14011+0252; LYMAN-BREAK GALAXIES; MASSIVE BLACK-HOLES; STARBURST GALAXIES; LOCAL UNIVERSE; SOURCE COUNTS; ENERGY-DISTRIBUTIONS; ULTRALUMINOUS GALAXY SO - Monthly Notices of the Royal Astronomical Society 2002 ;337(1):1-25 5754 UI - 10521 AU - Ivlev BI AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, San Luis Potosi, MexicoIvlev, BI, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USA TI - Euclidean resonance and quantum tunneling AB - The extremely small probability of tunneling through an almost classical potential barrier may become not small under the action of the specially adapted nonstationary signal which selects the certain particle energy E-R. For particle energies close to this value, the tunneling rate is not small during a finite interval of time and has a very sharp peak at the energy E-R. After entering inside the barrier, the particle emits electromagnetic quanta and exits the barrier with a lower energy. The signal amplitude can be much less compared to the field of the static barrier. This phenomenon can be called the Euclidean resonance since the under-barrier motion occurs in imaginary time. The resonance may stimulate chemical and biochemical reactions in a selective way by adapting the signal to a certain particular chemical bond. The resonance may be used in search of the soft-alpha-particle decay for which a conventional observation is impossible due to an extremely small decay rate MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000177200800015 L2 - COHERENT CONTROL; GENERATION; SCATTERING; DYNAMICS; BARRIER; PULSES; LASER; TIME SO - Physical Review A 2002 ;66(1): 5755 UI - 11026 AU - Ivlev BI AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoIvlev, BI, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USA TI - Hydrodynamic fluctuation forces AB - Two mechanisms of interaction of particles in a fluid are proposed on the basis of forces mediated by hydrodynamic thermal fluctuations. The first one is similar to the conventional van der Waals interaction, but instead of being mediated by electromagnetic fluctuations, it is mediated by fluctuations of hydrodynamic sound waves. The second one is due to a thermal drift of particles to a region with a bigger effective mass, which is formed by the surrounding fluid involved and depends on the inter-particle distance. Both mechanisms are likely to be relevant in the interpretation of the observed long-range attraction of colloidal particles, since a set of different experiments show an attraction energy of the order of k(B)T and, perhaps, only a fluctuation mechanism of attraction can provide this universality MH - Mexico|San Luis Potosi MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000175951700012 L2 - VANDERWAALS ATTRACTION ENERGY; CHARGED COLLOIDAL SUSPENSIONS; AIR/WATER INTERFACE; LIFSHITZ THEORY; SYSTEM; TEMPERATURE; PARTICLES; CRYSTALS; COUNTERIONS; MACROIONS SO - Journal of Physics-Condensed Matter 2002 ;14(19):4829-4842 5756 UI - 9198 AU - Izazola-Licea JA AU - vila-Figueroa C AU - Aran D AU - Piola S AU - Perdomo R AU - Hernandez P AU - Saavedra-Lopez JA AU - Valladares-Cardona R AD - Fdn Mexicana Salud AC, Reg AIDS Initiat Latin Amer & Caribbean, SIDALAC, Mexico City 14610, DF, MexicoSecretaria Salud Mexico, Mexico City, DF, MexicoCEES, Montevideo, UruguayIPEA, Brasilia, DF, BrazilCtr Amer, Tegucigalpa, AC, HondurasWHO, Natl Hlth Accounts, CH-1211 Geneva, SwitzerlandHlth & HIV AIDS Policy & Management, Mexico City, DF, MexicoGSD Consultores Asociados, Guatemala City, GuatemalaIzazola-Licea, JA, Fdn Mexicana Salud AC, Reg AIDS Initiat Latin Amer & Caribbean, SIDALAC, Av Periferico Sur 4809, Mexico City 14610, DF, Mexico TI - Country response to HIV/AIDS: National health accounts on HIV/AIDS in Brazil, Guatemala, Honduras, Mexico and Uruguay AB - National expenditures on HIV/AIDS were estimated as summary indicators to assess the country's response to HIV/AIDS. The methodology is based on a matrix system describing the level and flow of health expenditures on HIV/AIDS: an adaptation of the National Health Accounts methods. The expenditures were classified by source (public, private, international), by the use of funds (prevention, care), by object, and by type of provider institution. The results are reported in US$ using the official exchange rate for the year of estimation. For international comparisons monetary units were adjusted by the purchasing power parity (US$PPP). National HIV/AIDS total expenditures were: Guatemala US$PPP29.5 million, Uruguay US$PPP32.5 million, Mexico US$PPP257 million, and Brazil US$PPP587.4 million during 1998, and Honduras US$PPP33.9 million for 1999. The total HIV/AIDS expenditures per capita for 1998 were: Brazil US$2.69, Mexico US$1.25, Guatemala US$1.08, Uruguay US$6.63, and Honduras US$3.6 for 1999. The 1998 distribution of the total HIV/AIDS expenditures in prevention and care were, respectively, Brazil 10 and 80%, Guatemala 15 and 70%, Mexico 29 and 66%, Uruguay 36 and 51%, and Honduras 28 and 65% for 1999. The share of total expenditures on antiretroviral drugs ranged from 52% in Guatemala to 75% in Brazil, even when the estimated coverage of antiretroviral therapy was close to 10% in Guatemala and universal in Brazil. The estimated flow from international sources per capita in 1998 was Uruguay US$0.03, Brazil US$0.24, Guatemala US$0.11, Mexico US$0.01, and Honduras US$1.04 in 1999. The data allow international comparisons and provide critical information to improve equity and efficiency in the allocation of scarce resources. The National HIV/AIDS Accounts also constitute a powerful too[ to describe the country's response to HIV/AIDS. (C) 2002 Lippincott Williams Wilkins MH - Brazil MH - Guatemala MH - Honduras MH - Mexico|Distrito Federal MH - Switzerland MH - Uruguay PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0269-9370 UR - ISI:000180932000010 L2 - costs;financing;expenditures;resource allocation;country response;National Health Accounts;HIV/AIDS;Latin America;COST-EFFECTIVENESS; HIV SO - Aids 2002 ;16():S66-S75 5757 UI - 11391 AU - Jacob MC AU - Sauter MJ AD - Univ Calif Los Angeles, Dept Hist, Los Angeles, CA 90024, USACtr Invest & Docencia Econ AC, Mexico City, DF, MexicoJacob, MC, Univ Calif Los Angeles, Dept Hist, Box 951473, Los Angeles, CA 90024 USA TI - Why did Humphry Davy and associates not pursue the pain-alleviating effects of nitrous oxide? MH - USA MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;History & Philosophy Of Science U5 - J;Article AV - English IS - 0022-5045 UR - ISI:000175051000002 SO - Journal of the History of Medicine and Allied Sciences 2002 ;57(2):161-176 5758 UI - 11160 AU - James KE AU - Wagner FA AU - Anthony JC AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mental Hyg, ELCID, Baltimore, MD 21205, USAInst Nacl de Pesquisas da Amazonia, Direcc Invest Epidemiol & Psicosociales, Dept Invest Serv Salud, Mexico City, DF, MexicoAnthony, JC, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mental Hyg, ELCID, 324 N Broadway,ELCID Room 893, Baltimore, MD 21205 USA TI - Regional variation in drug purchase opportunity among youths in the United States, 1996-1997 AB - This study was designed to examine geographic variation in illegal drug purchase opportunity among young people living in the United States; there was a subfocus on age, sex, and urban/rural residence. Data from the 1996-1997 National Household Surveys on Drug Abuse were analyzed; the nationally representative sample of community residents included 21,531 participants aged 12-24 years old. Respondents were asked if someone bad approached them to sell them an illegal drug during the past 30 days. To protect respondents' confidentiality, there is no fine-grained geographical coding of data in the National Household Surveys on Drug Abuse public use data files, but nine geographical divisional indicators are provided (i.e., West North Central, New England, etc.). Results indicated males were an estimated 1.8 times more likely than females to have bad a recent illicit drug purchase opportunity, and urban residents were 1.5 times more likely than rural residents to have bad a recent drug purchase opportunity. As for geographic divisions, the Pacific division surpassed all other divisions: Its residents were 1.5 times more likely to have recent drug purchase opportunities than the West North Central division (used here as a reference category). After controlling statistically for age, sex, and urban/rural residence, residence in four divisions was found to be associated with greater likelihood of an illicit drug purchase opportunity. The observed patterns of drug purchase opportunity add new features to our understanding of illicit drug involvement across the United States MH - USA MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health;Medicine, General & Internal U5 - J;Article AV - English IS - 1099-3460 UR - ISI:000175565300013 L2 - adolescence;adult;neighborhood;street drugs;substance-related disorders;urban-rural;MARIJUANA SO - Journal of Urban Health-Bulletin of the New York Academy of Medicine 2002 ;79(1):104-112 5759 UI - 10005 AU - Jaquet N AU - Gendron D AD - Texas A&M Univ, Dept Marine Biol, Galveston, TX 77551, USAInst Politecn Nacl, Ctr Interdisciplinario & Ciencias Marinas, La Paz, BCS, MexicoJaquet, N, Texas A&M Univ, Dept Marine Biol, Galveston, TX 77551, USA TI - Distribution and relative abundance of sperm whales in relation to key environmental features, squid landings and the distribution of other cetacean species in the Gulf of California, Mexico AB - Sperm whales (Physeter macrocephalus) feed predominantly on meso- and bathypelagic cephalopods for which effective sampling methods have not been developed. The Gulf of California is one of the very few areas where sperm whales might feed on a commercially fished species of squid (jumbo squid, Dosidicus gigas), presenting a unique opportunity to investigate the impacts of variations in jumbo squid abundance on sperm whale distribution. This study examines sperm whale distribution and relative abundance in relation to the distribution of D. gigas, other cetacean species and key environmental features over spatial scales ranging from a few kilometers to a several hundreds of kilometers. Data were collected during two field seasons in spring-summer 1998 and 1999 using non-invasive techniques. Landing statistics show that the jumbo squid fishery collapsed in 1998 and started recovering in early 1999. Despite this collapse in 1998, sperm whales remained abundant during both years, but there were strong differences in their aggregative behavior. In 1998, sperm whales were roughly evenly distributed, while in 1999, there were three super-aggregations (similar to55 x 75 km across), which were stable for over a month. During both 1998 and 1999, sperm whales were uniformly distributed with respect to mean depth, slope and sea surface temperature over spatial scales of similar to10, 19, and 37 km segments and over areas of similar to70 x 90 km. There was no close association between sperm whale distribution and the distribution of jumbo squid landings in 1998. In 1999, about two-thirds of the individuals were found in areas of possibly high jumbo squid biomass. There was a significant correlation between the occurrence of sperm whales and that of bottlenose dolphins (Tursiops truncatus), despite the fact that they usually inhabit different water depths. This is the first study which was able to relate sperm whale distribution and relative abundance to the abundance of their main prey items. It suggests that sperm whales change their distribution in response to a decline in jumbo squid but that they do not leave the Gulf of California. However, this study encompassed only 2 years and further investigations are needed to gain an understanding of what may trigger large-scale movements MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000178722300018 L2 - OF-CALIFORNIA; DOSIDICUS-GIGAS; PACIFIC; BIOMASS; SHELF; BEHAVIOR; DORBIGNY; WATERS; SLOPE SO - Marine Biology 2002 ;141(3):591-601 5760 UI - 9626 AU - Jaramillo RD AU - Barraza BC AU - Polo A AU - Sara M AU - Contreras M AU - Escamilla JE AD - Univ Libre Secc Barranquilla, GIBIOM, Fac Ciencias Salud, Ctr Secc Invest, Barranquilla, ColombiaUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoJaramillo, RD, Univ Libre Secc Barranquilla, GIBIOM, Fac Ciencias Salud, Ctr Secc Invest, Antigue Via Puerto Colombia Km 7, Barranquilla, Colombia TI - The aerobic electron transport system of Eikenella corrodens AB - The respiratory system of the fastidious beta-proteobacterium Eikenella corrodens grown with limited oxygen was studied. Membranes showed the highest oxidase activity with ascorbate plus N, N, N', N'-tetramethyl-p-phenylenediamine (TMPD) or succinate and the lowest activity with NADH and formate. The presence of a bc(1)-type complex was suggested by the inhibition exerted by 2-heptyl-4-hydroxyquinoline-N-oxide (HOQNO), myxothiazol, and antimycin A on respiration with succinate and by the effect of the latter two inhibitors on the succinate-reduced difference spectra. Respiration with succinate or ascorbate-TMPD was abolished by low KCN concentrations, suggesting the presence of a KCN-sensitive terminal oxidase. Cytochromes b and c were spectroscopically detected after reduction with physiological or artificial electron donors, whereas type a and d cytochromes were not detected. The CO difference spectrum of membranes reduced by dithionite and its photodissociation spectrum (77 K) suggested the presence of a single CO compound that had the spectral features of a cytochrome o-like pigment. High-pressure liquid chromatography analysis of membrane haems confirmed the presence of haem B; in contrast, haems A and O were not detected. Peroxidase staining of membrane type c cytochromes using SDS-PAGE revealed the presence of five bands with apparent molecular masses of 44, 33, 30, 26, and 14 kDa. Based on our results, a tentative scheme of the respiratory chain in E. corrodens, comprising (i) dehydrogenases for succinate, NADH, and formate, (ii) a ubiquinone, (iii) a cytochrome bc(1), and (iv) a type-cbb' cytochrome c oxidase, is proposed MH - Colombia MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000179744300005 L2 - Eikenella corrodens;respiratory chain;bc(1) complex;oxidase cbb;BACILLUS-CEREUS; CYTOCHROME OXIDASES; TERMINAL OXIDASE; ESCHERICHIA-COLI; HEME-O; EXPRESSION; COMPLEXES; BACTERIA; MUTANT; OXYGEN SO - Canadian Journal of Microbiology 2002 ;48(10):895-902 5761 UI - 11181 AU - Jayawardhana R AU - Luhman KL AU - D'Alessio P AU - Stauffer JR AD - Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCALTECH, Ctr Sci, SIRTF, Pasadena, CA 91125, USAJayawardhana, R, Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA TI - Discovery of an edge-on disk in the MBM 12 young association AB - We report the discovery of a spatially resolved edge-on protoplanetary disk in the similar to2 Myr old MBM 12 young association. Our near-infrared images of LkHalpha 263C (MBM 12A 3C), obtained with the Hokupa' a adaptive optics system on the Gemini North telescope, clearly show two elongated reflection nebulosities separated by a dark lane, a morphology well matched by scattered-light models of an optically thick (at near-infrared wavelengths) edge-on disk. An optical spectrum of the scattered-light nebulosity obtained with the Keck II telescope exhibits a spectral type of M0 +/- 0.5 (T-eff = 3850 +/- 100 K) for the central star and contains H and forbidden emission lines, which may indicate the presence of a jet. The absence of a near-infrared point source implies A(g) > 9.5 K toward the unseen central star. The disk is flared and has a radius of similar to150 AU (at a distance of 275 pc) and an inclination of 87degrees. The aspect ratio of the model disk in the J band is 0.72. There is possible evidence of dust settling to the disk midplane. LkHalpha 263C is 4."115 from the 0."415 binary LkHalpha 263 A and B (MBM 12A 3A and 3B), which is itself 15."5 from LkHalpha 262 (MBM 12A 2). Thus, LkHalpha 263C may be the first disk to be clearly resolved around an individual star in a young quadruple system. The detection of a faint edge-on disk near a bright star demonstrates both the high angular resolution and the high sensitivity that can be achieved with adaptive optics imaging on large telescopes MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175519700011 L2 - binaries : close;circumstellar matter;open clusters and associations : individual (MBM 12);stars : pre-main-sequence;techniques : high angular resolution;PROTOPLANETARY DISKS; OPTICAL SPECTROSCOPY; ACCRETION DISKS; MOLECULAR CLOUD; STARS; MULTIPLICITY; OBJECTS; SYSTEM SO - Astrophysical Journal 2002 ;571(1):L51-L54 5762 UI - 10051 AU - Jenchen U AU - Rosenfeld U AD - Univ Autonoma Neuvo Leon, Fac Ciencias Tierra, Linares 67700, MexicoRosenfeld, U, Wiedehagen 91, D-48163 Munster, Germany TI - Continental Triassic in Argentina: response to tectonic activity AB - In Argentina, continental Triassic sediments occur in many sedimentary basins. They overlie a complex basement consisting of several terranes. The sediments form cycles at different scales. Small-scale cycles, such as point bar fining upward sequences, are common structures. Large-scale cycles, covering several lithostratigraphic formations, and middle-scale cycles, which create the formations or parts thereof, indicate uplift pulses of the basin hinterlands or the respective terranes, respectively. The middle-scale cycles also may be connected with volcanic events. The uplift pulses in the different terranes occurred, with few exceptions, independently of one another and were a main controlling factor in the evolution of the basins. Field work and pebble, modal, and geochemical analyses provide a differentiated view of the evolution of the Triassic sedimentary basins in space and time. In general, the sediments were derived from traceable stable blocks. In the Marayes-Desaguadadero basin, the Rincon Blanco section (Cuyo basin), Malargue basin, and perhaps the Deseado massif, the sources include magmatic arcs and a variety of terranes. (C) 2002 Published by Elsevier Science Ltd MH - Germany MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000178599900005 L2 - tectonic uplift;depositional cycles;geochemical analyses;PROVENANCE; TERRANE SO - Journal of South American Earth Sciences 2002 ;15(4):461-479 5763 UI - 11533 AU - Jennings DE AU - Deming D AU - McCabe G AU - Sada PV AU - Moran T AD - NASA, Goddard Space Flight Ctr, Planetary Syst Branch, Greenbelt, MD 20771, USACatholic Univ Amer, Inst Astrophys & Computat Sci, Washington, DC 20064, USAUniv Monterrey, Dept Fis & Matemat, San Pedro Garza Garcia 66259, NL, MexicoCatholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20064, USAJennings, DE, NASA, Goddard Space Flight Ctr, Planetary Syst Branch, Greenbelt, MD 20771 USA TI - Solar magnetic field studies using the 12 micron emission lines. IV. Observations of a Delta region solar flare AB - We have recently developed the capability to make solar vector ( Stokes IQUV) magnetograms using the infrared line of Mg I at 12.32 mum. On 2001 April 24, we obtained a vector magnetic map of solar active region NOAA 9433, fortuitously just prior to the occurrence of an M2 flare. Examination of a sequence of SOHO / Michaelson Doppler Imager magnetograms and comparison with ground-based Halpha images shows that the are was produced by the cancellation of newly emergent magnetic flux outside of the main sunspot. The very high Zeeman sensitivity of the 12 mum data allowed us to measure field strengths on a spatial scale which was not directly resolvable. At the are trigger site, opposite polarity fields of 2700 and 1000 G occurred within a single 2 00 resolution element, as revealed by two resolved Zeeman splittings in a single spectrum. Our results imply an extremely high horizontal field strength gradient (5 G km(-1)) prior to the are, significantly greater than seen in previous studies. We also find that the magnetic energy of the cancelling fields was more than sufficient to account for the flare's X-ray luminosity MH - USA MH - Mexico|Nuevo Leon PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000174625700047 L2 - line : profiles;magnetic fields;Sun : activity;Sun : flares;Sun : infrared;MG-I; FEATURES; SUNSPOTS SO - Astrophysical Journal 2002 ;568(2):1043-1048 5764 UI - 11059 AU - Jimenez-Mier J AU - Diebold U AU - Ederer DL AU - Callcott TA AU - Grush M AU - Perera RC AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoTulane Univ, Dept Phys, New Orleans, LA 70118, USAUniv Tennessee, Dept Phys, Knoxville, TN 37996, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAJimenez-Mier, J, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Decay channels for the Ti(2p(1/2)) core hole excitations in TiO2 observed by x-ray Raman scattering AB - We present high-resolution x-ray fluorescence spectra, corrected for self-absorption, following resonant excitation of a Ti(2p(1/2)) electron in TiO2. Several transitions are studied that show complex behavior as a function of photon excitation energy, indicative of interaction in the excitation and decay channels. Three peaks are identified as transitions resulting from the excitation of a 2p(1/2) electron, one of them corresponding to direct valence emission with a 3d spectator electron and the other two to participator emission following the Coster-Kronig decay of the 2p(1/2) hole. Additional emission features at higher photon energies correspond to valence emission in the presence of a charge-transfer excitation that has been found in the 2p x-ray photoelectron spectroscopy spectrum, and also in the x-ray absorption spectrum. A detailed analysis of the energy dispersion versus excitation energy provides information about the dynamical processes involved. The results are interpreted in terms of the calculated band structure of the compound MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000175758700038 L2 - RESONANT PHOTOEMISSION; ELECTRONIC-STRUCTURE; L-EDGE; RUTILE; ABSORPTION; SPECTRA; EMISSION; SPECTROSCOPY; DEPENDENCE; ANATASE SO - Physical Review B 2002 ;65(18): 5765 UI - 10458 AU - Jimenez-Montano MA AU - Ebeling W AU - Pohl T AU - Rapp PE AD - Univ Americas Puebla, Dept Fis & Matemat, Puebla 72820, MexicoUniv Veracruzana, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, MexicoHumboldt Univ, Inst Phys, D-10115 Berlin, GermanyMed Coll Penn & Hahnemann Univ, Dept Physiol, Philadelphia, PA 19129, USAJimenez-Montano, MA, Univ Americas Puebla, Dept Fis & Matemat, Sta Catarina Martir, Puebla 72820, Mexico TI - Entropy and complexity of finite sequences as fluctuating quantities AB - The paper is devoted to the analysis of digitized sequences of real numbers and discrete strings, by means of the concepts of entropy and complexity. Special attention is paid to the random character of these quantities and their fluctuation spectrum. As applications, we discuss neural spike-trains and DNA sequences. We consider a given sequence as one realization of finite length of certain random process. The other members of the ensemble are defined by appropriate surrogate sequences and surrogate processes. We show that n-gram entropies and the context-free grammatical complexity have to be considered as fluctuating quantities and study the corresponding distributions. Different complexity measures reveal different aspects of a sequence. Finally, we show that the diversity of the entropy (that takes small values for pseudorandom strings) and the context-free grammatical complexity (which takes large values for pseudorandom strings) give, nonetheless, consistent results by comparison of the ranking of sample sequences taken from molecular biology, neuroscience, and artificial control sequences. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Germany MH - Mexico|Puebla MH - Mexico|Veracruz MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Biology U5 - J;Article AV - English IS - 0303-2647 UR - ISI:000177586300004 L2 - block entropies;diversity of entropy;algorithmic complexity;spectrum of fluctuations;spike trains;DNA sequences;NEURAL SPIKE-TRAINS; ALGORITHMIC COMPLEXITY; DNA-SEQUENCES; TIME-SERIES; COMPRESSION SO - Biosystems 2002 ;64(1-3):23-32 5766 UI - 10840 AU - Jimenez-Ruiz FA AU - Garcia-Prieto L AU - de Leon GPP AD - Univ Nacl Autonoma Mexico, Inst Biol, Lab helmintol, Mexico City 04510, DF, MexicoJimenez-Ruiz, FA, Univ Nebraska, Harold W Manter Lab Parasitol, W529, Lincoln, NE 68588 USA TI - Helminth infracommunity structure of the sympatric garter snakes Thamnophis eques and Thamnophis melanogaster from the Mesa Central of Mexico AB - Seventy-two Mexican garter snakes (Thamnophis eques) and 126 black-bellied garter snakes (T melanogaster) were collected from 4 localities of the Mesa Central of Mexico between July 1996 and February 1998 and examined for helminths. Both species of garter snakes occurred sympatrically in every locality except in Lake Cuitzeo. Both species of snakes shared 9 helminth species. and in general, T. melanogaster hosted a number of species than T. eques. In each locality. a different helminth species showed the highest levels of prevalence and abundance (Spiroxys susanae in Cienaga de Lerma, Telorchis corti in Lago de Patzcuaro, Proteocephalus variabilis in Lago de Cuitzeo, and Contracaecum sp. in Lago de Chapala). Helminth communities in garter snakes of the Mesa Central arc depauperate and dominated by a single parasite species. In those localities where the snakes occurred in sympatry, helminth communities were, in general. more diverse and species-rich in T. Differences in the ecology and physiology of these species of garter snakes may explain this pattern because black-bellied garter snakes (T. melonogaster) are more aquatic than Mexican garter snakes (T. eques) and primarily eat aquatic prey, potentially exposing themselves to a larger number of helminths transmitted by predator-prey infection. The helminth infracommunities of garter snakes in the Mesa Central of Mexico show a strong Nearctic influence because most of the species infecting these hosts have, been recorded in other Nearctic colubrid snakes. However, the helminth infracommunities of these garter snakes are less species-rich and less diverse than those in colubrid snakes in more temperate latitudes. The widespread ecological perturbation of sampling sites in the Mesa Central because of human activity. and geographic differences in foraging ecology of the hosts and, thus, exposure to parasites transmitted by intermediate hosts may help to explain these patterns MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000176526500005 L2 - COMMUNITY STRUCTURE; LAKE PATZCUARO; PARASITES; RICHNESS; FISH; DIVERSITY SO - Journal of Parasitology 2002 ;88(3):454-460 5767 UI - 11159 AU - Jimenez RM AU - Soltero JFA AU - Manriquez R AU - Lopez-Dellamary FA AU - Palacios G AU - Puig JE AU - Morini M AU - Schulz PC AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Dept Madera, Guadalajara 44430, Jalisco, MexicoUniv Nacl Sur, Dept Quim & Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Guadalajara, Dept Celulosa & Papel & Quim, Guadalajara 44430, Jalisco, MexicoPuig, JE, Univ Guadalajara, Dept Ingn Quim, Blvd Marcelino Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Unusual Hofmann elimination under mild conditions in polymerizable cationic surfactant systems AB - Hofmann elimination and nucleophilic substitution reactions have been simultaneously observed at relatively low temperatures in a family of polymerizable alkyltrimethylammonium methacrylate surfactants, as well as in dodecyltrimethylammonium hydroxide. In concentrated aqueous solutions of the latter surfactant, Hofmann elimination occurs at room temperature. These reactions have been verified by IR, H-1 NMR, and C-13 NMR spectroscopies; differential scanning calorimetry; gas chromatography coupled to mass spectroscopy; and other techniques. A possible explanation of this phenomenon is provided MH - Argentina MH - Mexico|Jalisco PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000175500300003 L2 - LIQUID-CRYSTALLINE PHASES; BROMIDE; MICELLAR; WATER SO - Langmuir 2002 ;18(10):3767-3772 5768 UI - 9906 AU - Jin Y AU - Bok JW AU - Guzman-de-Pena D AU - Keller NP AD - Univ Wisconsin, Dept Plant Pathol, Madison, WI 53706, USATexas A&M Univ, Dept Plant Pathol, College Stn, TX 77843, USAIPN, Dept Genet & Mol Biol, Ctr Invest & Estud Avanzados, Irapuato, Gto, MexicoKeller, NP, Univ Wisconsin, Dept Plant Pathol, 1630 Linden Dr, Madison, WI 53706 USA TI - Requirement of spermidine for developmental transitions in Aspergillus nidulans AB - Deletion of the spermidine synthase gene in the fungus Aspergillus nidulans results in a strain, DeltaspdA, which requires spermidine for growth and accumulates putrescine as the sole polyamine. Vegetative growth but not sporulation or sterigmatocystin production is observed when DeltaspdA is grown on media supplemented with 0.05-0.10 mM exogenous spermidine. Supplementation of DeltaspdA with greater than or equal to0.10 mM spermidine restores sterigmatocystin production and greater than or equal to0.50 mM spermidine produces a phenotype with denser asexual spore production and decreased radial hyphal growth compared with the wild type. DeltaspdA spores germinate in unsupplemented media but germ tube growth ceases after 8 h upon which time the spores swell to approximately three times their normal diameter. Hyphal growth is resumed upon addition of 1.0 mM spermidine. Suppression of a G protein signalling pathway could not force asexual sporulation and sterigmatocystin production in DeltaspdA strains grown in media lacking spermidine but could force both processes in DeltaspdA strains supplemented with 0.05 mM spermidine. These results show that increasing levels of spermidine are required for the transitions from (i) germ tube to hyphal growth and (ii) hyphal growth to tissue differentiation and secondary metabolism. Suppression of G protein signalling can over-ride the spermidine requirement for the latter but not the former transition MH - Mexico|Guanajuato MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000178968400019 L2 - ORNITHINE DECARBOXYLASE GENE; PROTEIN-KINASE; SACCHAROMYCES-CEREVISIAE; CONIDIOPHORE DEVELOPMENT; POLYAMINE METABOLISM; SIGNALING PATHWAY; SPORULATION; GROWTH; BIOSYNTHESIS; EXPRESSION SO - Molecular Microbiology 2002 ;46(3):801-812 5769 UI - 11394 AU - Johal KK AU - Mendoza-Suarez G AU - Escalante-Garcia JI AU - Hill RG AU - Brook IM AD - IPN, Unidad Saltillo, Ctr Invest & Estudios Avanzados, Saltillo, Coahuila, MexicoUniv London, Imperial Coll, Dept Mat, London WC1E 7HU, EnglandUniv Sheffield, Dept Oral & Maxillofacial Surg, Sheffield S10 2TN, S Yorkshire, EnglandMendoza-Suarez, G, IPN, Unidad Saltillo, Ctr Invest & Estudios Avanzados, Carr Saltillo Mty Km 13,Apdo Postal No 663, Saltillo, Coahuila, Mexico TI - In vivo response of strontium and zinc-based ionomeric cement implants in bone AB - In this study the osteoconductive properties of strontium based ionomeric cements (ICs) named, LG 125 and LG 119, as well as zinc-based ICs, designated by LG 130 and LG 132, were compared. Wet ICs were surgically implanted into the femora of weaned Wistar rats for 4 weeks. To assess the percentage osseointegration the perimeter of the implant and the perimeter of bone in contact with the implant were measured using a pointer (the length of bone/implant interfacial contact). Osteoconduction was determined by taking six points at random around the perimeter of each ionomeric rod measuring the thickness of newly formed bone. The degree of osteoconduction was taken as the average thickness of new bone produced on the implant surface. It was found that osteoconduction was greatest in the strontium based IC implant LG125. From these studies it can be concluded that the composition LG125 might provide a useful purpose as a bone cement. (C) 2002 Kluwer Academic Publishers MH - United Kingdom MH - Mexico|Coahuila PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0957-4530 UR - ISI:000175054400005 L2 - OTOLOGIC SURGERY; RATS; DEFICIENCY; METABOLISM SO - Journal of Materials Science-Materials in Medicine 2002 ;13(4):375-379 5770 UI - 9942 AU - Johanneson B AU - Lima G AU - von Salome J AU - arcon-Segovia D AU - arcon-Riquelme ME AD - Univ Uppsala, Rudbeck Lab, Dept Genet & Pathol, Inst Genet & Pathol,Sect Med Genet, S-75185 Uppsala, SwedenInst Nacl ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoAlarcon-Riquelme, ME, Univ Uppsala, Rudbeck Lab, Dept Genet & Pathol, Inst Genet & Pathol,Sect Med Genet, Dag Hammarsjolds Vag 20, S-75185 Uppsala, Sweden TI - A major susceptibility locus for systemic lupus erythemathosus maps to chromosome 1q31 AB - A set of 87 multicase families with systemic lupus erythemathosus (SLE) from European (Iceland, Sweden, England, Norway, Italy, and Greece) and recently admixed (Mexico, Colombia, and the United States) populations were genotyped and analyzed for 62 microsatellite markers on chromosome 1. By parametric two-point linkage analysis, six regions (1p36, 1p21, 1q23, 1q25, 1q31, and 1q43) were identified that have LOD scores of Zgreater than or equal to1.50, with different contributions, depending on the population of origin of the families (European or admixed American). All of the regions have been described previously and have therefore been confirmed in this analysis. The locus at 1q31 showed a significant three-point LOD score of Z=3.79 and was contributed by families from all populations, with several markers and under the same parametric model. Analysis of a known mutation in the CD45 gene did not support the role that this mutation plays in disease. We conclude that the locus at 1q31 contains a major susceptibility gene, important to SLE in general populations MH - Mexico|Distrito Federal MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 35 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000178884300006 L2 - SEVERE COMBINED IMMUNODEFICIENCY; SIB-PAIR FAMILIES; MULTIPLE-SCLEROSIS; GENETIC-LINKAGE; POINT MUTATION; SOCIOECONOMIC-STATUS; RHEUMATIC DISEASES; AUTOIMMUNE-DISEASE; AFRICAN-AMERICANS; CELL MATURATION SO - American Journal of Human Genetics 2002 ;71(5):1060-1071 5771 UI - 10263 AU - Johnson RJ AU - Rodriguez-Iturbe B AU - Schreiner GF AU - Herrera-Acosta J AD - Baylor Coll Med, Dept Med, Div Nephrol, Houston, TX 77030, USAUniv Hosp, Maracaibo, VenezuelaUniv Zulia, Maracaibo 4011, VenezuelaInst Nacl Cardiol 1, Dept Nephrol, Mexico City, DF, MexicoScios Inc, Sunnyvale, CA, USAJohnson, RJ, Baylor Coll Med, Dept Med, Div Nephrol, SM-1273,6550 Fannin St, Houston, TX 77030 USA TI - Hypertension: a microvascular and tubulointerstitial disease AB - The vast majority of patients with essential hypertension have structural changes in their kidneys consisting of pre-glomerular vascular disease ('arteriolosclerosis') and tubulointerstitial injury. Most authorities have assumed that these structural changes occur secondary to hypertensive renal injury. However, Goldblatt proposed that primary renal microvascular disease might be the cause of some forms of hypertension. In this paper we present recent studies from our group that support a role for both pre-glomerular vascular disease as well as the tubulointerstitial inflammatory response in mediating salt-sensitivity. We propose that subtle acquired renal injury may underlie the etiology of some forms of salt-sensitive hypertension. (C) 2002 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000177951700001 L2 - hypertension;arterialopathy;salt sensitivity;interstitial fibrosis;angiotensin II;Goldblatt;SALT-SENSITIVE HYPERTENSION; BLOOD-PRESSURE VARIATION; ANGIOTENSIN-II; RENAL INJURY; URIC-ACID; RATS; KIDNEY; PATHOGENESIS; HEMODYNAMICS; EXPOSURE SO - Journal of Hypertension 2002 ;20():S1-S7 5772 UI - 10479 AU - Johnson RJ AU - Herrera-Acosta J AU - Schreiner GF AU - Rodriguez-Iturbe B AD - Baylor Coll Med, Houston, TX 77030, USAInst Nacl Cardiol Ignacio Chavez, Mexico City 14080, DF, MexicoScios, Sunnyvale, CA 94085, USAUniv Hosp, Maracaibo 4001 A, VenezuelaJohnson, RJ, Baylor Coll Med, Houston, TX 77030, USA TI - Salt-sensitive hypertension - Reply MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0028-4793 UR - ISI:000177672400024 SO - New England Journal of Medicine 2002 ;347(6):448-449 5773 UI - 11625 AU - Johnson RJ AU - Herrera-Acosta J AU - Schreiner GF AU - Rodriguez-Iturbe B AD - Baylor Coll Med, Div Nephrol, Houston, TX 77030, USAInst Nacl Cardiol I Chavez, Dept Nephrol, Mexico City, DF, MexicoScios, Sunnyvale, CA, USAUniv Zulia, Univ Hosp, Renal Serv, Maracaibo 4011, VenezuelaUniv Zulia, Univ Hosp, Dept Immunobiol, Maracaibo 4011, VenezuelaJohnson, RJ, Baylor Coll Med, Div Nephrol, SM-1273,6550 Fannin St, Houston, TX 77030 USA TI - Mechanisms of disease - Subtle acquired renal injury as a mechanism of salt-sensitive hypertension MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 143 U4 - Medicine, General & Internal U5 - J;Review AV - English IS - 0028-4793 UR - ISI:000174464100008 L2 - MUSCLE CELL-PROLIFERATION; BLOOD-PRESSURE VARIATION; ANGIOTENSIN-II; TUBULOINTERSTITIAL DISEASE; SYMPATHETIC OVERACTIVITY; MEDIATED HYPERTENSION; ARTERIAL-PRESSURE; IN-VIVO; SODIUM; RATS SO - New England Journal of Medicine 2002 ;346(12):913-923 5774 UI - 10612 AU - Juan-Salles C AU - Marco A AU - Ramos-Vara JA AU - Resendes A AU - Verges J AU - Valls X AU - Montesinos A AD - Clin Exot, Barcelona 08022, SpainUniv Autonoma Barcelona, Fac Vet, UD Histol & Anat Patol, E-08193 Barcelona, SpainUniv Missouri, Vet Med Diagnost Lab, Columbia, MO 65205, USACtr Vet Los Sauces, Madrid 28010, SpainJuan-Salles, C, Africam Safari, Dept Patol, 11 Oriente 2407 Col Azcarate, Puebla 72007, Mexico TI - Islet hyperplasia in callitrichids AB - Five callitrichids (three common marmosets -Callithrix jacchus -, a black tufted-eared marmoset -C penicillata, and a saddle-back tamarin -Saguinus fuscicollis) were diagnosed with islet hyperplasia by histopathology and immunohistochemistry. All were privately-owned, unrelated callitrichids ranging from 2- to 4-year-old. Relevant findings were anorexia (3/5), vomiting (2/5), ptyalism (1/5), polyuria/polydipsia (1/5), respiratory distress (1/5), hyperglycemia (2/3) and glycosuria (1/1); hyperglycemia and glycosuria were associated with pregnancy in a common marmoset and resolved after reducing simple carbohydrates in diet. All five animals died, three of them after few premonitory signs; in two cases, other concurrent diseases unrelated to islet hyperplasia were considered the cause of death. Additional animals from two facilities had high weight (4), physical obesity (3), polyuria/polydipsia/polyphagia/uriposia (1), hyperglycemia (1), and/or glycosuria (2). Pathologic findings in the deceased callitrichids were: islet hyperplasia (5/5); hemosiderosis (5/5); lipomatosis (4/5) of several tissues (atria, 3/5; pancreas, gall bladder, intestine, esophagus, and thyroid, 2/5; liver, 1/5); pancreatic necrosis or steatonecrosis, and/or acute pancreatitis (3/5); and vacuolation of hepatocytes and renal tubular cells most likely consistent with hepatorenal lipidosis (2/5). The islets of Langerhans were more numerous and larger than in a control, and morphologically normal in all cases, except in a common marmoset that had a few cells with a foamy cytoplasm and shrunken hyperchromatic or picknotic nucleus. Insulin (5/5), glucagon (3/5), and somatostatin (3/5) immunohistochemistry revealed that most cells stained positively for insulin diffusely in their cytoplasm (5/5) (staining restricted to the vascular pole of beta-cells in the control). These findings suggest that obesity, insulin resistance and/or type II diabetes may be implicated and thus a prospective study on these diseases in callitrichids is necessary to determine their etiopathogenesis MH - Mexico|Puebla MH - Spain MH - USA PB - TOKYO: SPRINGER-VERLAG TOKYO RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0032-8332 UR - ISI:000176969000003 L2 - callitrichid;Callithrix;diabetes;fatty liver-kidney syndrome;Hemosiderosis;insulin resistance;islet hyperplasia;lipomatosis;pancreatic steatonecrosis;saguinus;MARMOSETS CALLITHRIX-JACCHUS; MICE; HYPERINSULINISM SO - Primates 2002 ;43(3):179-190 5775 UI - 11733 AU - Juarez-Olguin H AU - Jung-Cook H AU - Flores-Perez J AU - Asseff IL AD - Natl Autonomous Univ Mexico, Fac Med, Dept Farmacol, Mexico City, DF, MexicoInst Nacl Pediat, Unidad Farmacol Clin, Mexico City, DF, MexicoInst Nacl Neurol & Neurocirug, Dept Neurofarmacol, Mexico City, DF, MexicoIPN, CHDIR, Durango, CO, USAJuarez-Olguin, H, Ave Iman 1,3 Piso,Colony Cuicuilco, Mexico City 04530, DF, Mexico TI - Clinical evidence of an interaction between imipramine and acetylsalicylic acid on protein binding in depressed patients AB - The binding of imipramine to plasma protein,,, was studied in 20 adult patients with endogenous depression, with the purpose of assessing the effect produced by its simultaneous administration with an analgesic. Patients were administered 156 mg/day imipramine for 5 days and the binding to plasma proteins was determined. This as repeated 2 days later. after simultaneous administration of imipramine with 1,000 mg/day acetylsalicylic acid (ASA). Adverse effects for each patient were registered during both phases and were classified as mild, moderate, or severe. Results showed 84.4 +/- 7.07% of imipramine bound to plasma proteins and 72.18 +/- 6.5% when imipramine was administered with ASA (p < 0.05). When imipramine as administered alone, 1.95 mild adverse events per patient were registered, When imipramine vas administered with ASA. the mild adverse events increased to 3.1 (p < 0.0 1) and the severe adverse events increased from 0.6 to 1.5 (p < 0.0 1). The levels of free imipramine increased hen ASA was administered. indicating a displacement on the binding to plasma proteins. When adverse events were compared for each treatment, the accumulation of the free fraction of imipramine caused an increase in adverse events as well as in their clinical severity MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 0362-5664 UR - ISI:000174100400006 L2 - adverse events;drug interactions;pharmacovigilance;impramine;tricyclic antidepressants;TRICYCLIC ANTIDEPRESSANTS; PLASMA-PROTEIN; TISSUE BINDING SO - Clinical Neuropharmacology 2002 ;25(1):32-36 5776 UI - 10284 AU - Juarez-Vazquez J AU - Bonizzoni E AU - Scotti A AD - Italfarmaco Spa, Dept Med, I-20092 Milan, ItalyDr Dario Fernandez Hosp, Mexico City, DF, MexicoUniv Milan, Inst Med Stat, Milan, ItalyScotti, A, Italfarmaco Spa, Dept Med, Via Lavoratori 54, I-20092 Milan, Italy TI - Iron plus folate is more effective than iron alone in the treatment of iron deficiency anaemia in pregnancy: a randomised, double blind clinical trial AB - Objective To evaluate whether folate supplementation to iron is able to accelerate solving of iron deficiency anaemia in pregnancy. Design Multicentre, double blind, randomised clinical trial. Setting Nine hospital gynaecologic units located in Mexico. Population Three hundred seventy-one women with iron deficiency anaemia between 14 and 27 weeks of pregnancy. Methods Random allocation of the study population to receive 80 mg iron proteinsuccinylate, with or without 0.370 mg folinic acid daily for 60 days. Main outcome measure Haemoglobin concentration increase. Results Combined iron and folate therapy showed a better therapeutic response: the increase in haemoglobin levels from baseline was 1.42 (0.14) g/dL for women treated with both compounds vs 0.80 (0.125) g/dL for those given iron only (P < 0.001). A multivariable regression analysis showed that this effect was independent of basal levels of blood iron, ferritine and serum folate and was more evident in women with more severe anaemia. In the 64 women belonging to the subgroup defined by the per-protocol (PP) population and the lowest quartile of baseline haemoglobin values (mean 8.96, range 5.9-9.8 g/dL), the increase at day 60 was estimated 2.3 (0.53) g/dL for the combined therapy vs 0.5 (0.5) g/dL for iron only (P = 0.07). No significant differences in tolerability were observed between the two groups. Conclusion Folate supplementation is recommended in pregnant women with iron deficiency anaemia irrespective of the serum levels of folate MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 1470-0328 UR - ISI:000178057800008 L2 - NEURAL-TUBE DEFECTS; FOLIC-ACID; ANEMIA; WOMEN SO - Bjog-An International Journal of Obstetrics and Gynaecology 2002 ;109(9):1009-1014 5777 UI - 10779 AU - Juarez LH AU - Glowinski R AU - Pettitt BM AD - UAM I, Dept Matemat, Mexico City, DF, MexicoUniv Houston, Dept Math, Houston, TX 77204, USAUniv Houston, Dept Chem, Houston, TX 77204, USAJuarez, LH, UAM I, Dept Matemat, AP55-532, Mexico City, DF, Mexico TI - Numerical simulation of the sedimentation of a tripole-like body in an incompressible viscous fluid AB - In this note, we discuss the application of a methodology combining distributed Lagrange multiplier based fictitious domain techniques, finite-element approximations and operator splitting, to the numerical simulation of the motion of a tripole-like rigid body falling in a Newtonian incompressible viscous fluid. The motion of the body is driven by the hydrodynamical forces and gravity. The numerical simulation shows that the distribution of mass of this rigid body and added moment of inertia compared to a simple cylinder (circular or elliptic) plays a significant role on the particle-fluid interaction. Apparently, for the parameters examined, the action of the moving rigid body on the fluid is stronger than the hydrodynamic forces acting on the rigid body. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0893-9659 UR - ISI:000176767500013 SO - Applied Mathematics Letters 2002 ;15(6):743-747 5778 UI - 10448 AU - Juaristi E AU - Hernandez-Rodriguez M AU - Lopez-Ruiz H AU - Avina J AU - Munoz-Muniz O AU - Hayakawa M AU - Seebach D AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoETH Honggerberg, Organ Chem Lab, Dept Chem, CH-8093 Zurich, SwitzerlandJuaristi, E, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Synthesis of new chiral derivatives of N,N '-dimethylpropyleneurea (DMPU) and examination of their influence on the regio- and enantioselectivity of addition of 2-(1,3-dithianyl)lithium to cyclohex-2-en-1-one AB - The preparation of three new chiral derivatives of DMPU (N,N'-dimethylpropyleneurea) is described (Schemes 2 - 4); one type of derivative carries I-phenylethyl or 1-cyclohexylethyl groups at the N-atoms of the tetrahydropyrimidin-2(1H)-one ring (2 and 4), another type of derivative is substituted at C(4) and C(6) of the heterocyclic ring (7). The potential of these chiral Lewis bases as promoters in the regio- and/or enantioselective addition of 2-(1,3-dithianyl)lithium to cyclohex-2-en-1-one was explored; they are all unable to effect enantioselective addition; the derivatives with branched substituents at the N-atoms do not shift the addition mode from 1,2 to 1,4, while the 3,4,5,6-tetrahydro-1,3,4,6-tetramethylpyrimidin-2(1H)-one does (Scheme 5). The results provide useful information regarding the nature of the nucleophilic organolithium reagent: obviously, the steric hindrance to Li complexation on the C=O O-atom of the tetrahydropyrimidin-2(1H)-one by branched substituents at N-atoms (cf. X-ray crystal structure of 2 in the Fig.) prevents solvent-separated-ion-pair (SSIP) formation; this was confirmed by PM3 and B3LYP/3-21-G(d)//PM3 calculations (Scheme 6) MH - Mexico|Distrito Federal MH - Switzerland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0018-019X UR - ISI:000177517300014 L2 - ORTHO-METHOXY GROUPS; SILICON TETRACHLORIDE; MESO EPOXIDES; LEWIS-BASES; LITHIUM; AGGREGATION; NMR; AMINES; HMPA; REGIOSELECTIVITY SO - Helvetica Chimica Acta 2002 ;85(7):1999-2008 5779 UI - 10175 AU - Jug K AU - Zimmermann B AU - Koster AM AD - Univ Hannover, D-30167 Hannover, GermanyCINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoJug, K, Univ Hannover, Kleinen Felde 30, D-30167 Hannover, Germany TI - Growth pattern and bonding of copper clusters AB - Density functional theory calculations of copper cluster Cu-n with n = 2-10 are analyzed with respect to their molecular orbitals. It is shown that shell type orbitals of s, p, and d character govern the electronic structure growth and have an influence on the geometric structure. They appear as highest occupied molecular orbital, lowest unoccupied molecular orbital, or as orbitals energetically close to these. Their occurrence can explain the magic numbers of shell models. The bonding in such structures can be explained by an analysis of the critical points of the molecular electrostatic potential. Six types of critical points are observed and related to bonds, rings, cages, lone pairs, and their connections. (C) 2002 Wiley Periodicals, Inc MH - Germany MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000178126500013 L2 - copper clusters;shell orbitals;critical points;MOLECULAR ELECTROSTATIC POTENTIALS; MINIMAL CHARACTERISTICS; METAL-CLUSTERS; NA-N; POLARIZABILITIES; PHYSICS SO - International Journal of Quantum Chemistry 2002 ;90(2):594-602 5780 UI - 11662 AU - Jug K AU - Zimmermann B AU - Calaminici P AU - Koster AM AD - Univ Hannover, D-30167 Hannover, GermanyCINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoJug, K, Univ Hannover, Kleinen Felde 30, D-30167 Hannover, Germany TI - Structure and stability of small copper clusters AB - The structure and stability of small copper clusters with up to ten atoms has been determined both for the neutral and the ionic clusters with density functional calculations. The calculations were of all-electron type. The structure optimization and frequency analysis were performed on the local density approximation level with the exchange correlation functional by Vosko, Wilk, and Nusair. Subsequently improved calculations for the stability were based on the generalized gradient approximation, where the exchange correlation functional of Perdew and Wang was used. Finally, the binding energies, ionization potentials, electron affinities, and separation energies were calculated. The results show that the trends are in agreement with available experimental data. (C) 2002 American Institute of Physics MH - Germany MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 46 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000174210100014 L2 - COLLISION-INDUCED DISSOCIATION; SPIN-DENSITY CALCULATIONS; PHOTOELECTRON-SPECTROSCOPY; METAL-CLUSTERS; ELECTRONIC-PROPERTIES; MOLECULAR INTEGRALS; ENERGY; FRAGMENTATION; APPROXIMATION; POTENTIALS SO - Journal of Chemical Physics 2002 ;116(11):4497-4507 5781 UI - 11453 AU - Jung C AU - Taylor HS AU - Atilgan E AD - Univ So Calif, Dept Chem, Los Angeles, CA 90089, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoTaylor, HS, Univ So Calif, Dept Chem, Los Angeles, CA 90089, USA TI - Extraction of the vibrational dynamics from spectra of highly excited polyatomics: DCO AB - The effective spectroscopic Hamiltonian fitted to experiment by Troellsch and Temps (Z Phys. Chem. 2001, 215, 207) and describing high vibrational excitation to bound and resonant states is used in conjunction with methods of nonlinear classical dynamics and semiclassical mechanics to extract, for all of the observed highly excited resonance levels in polyad 8, the molecular motions upon which they are quantized, Two types of interlaced dynamically distinct ladders of states are revealed. The rungs of these ladders intersperse, making the spectra complex. The resonant 2:2:1 frequency ratio of the DC and CO stretches and the bend, respectively, is what causes the complexity and is what caused past attempts at interpretation to be at best incomplete, All states are assigned with physically meaningful quantum numbers corresponding to quasiconserved quantities. Most interestingly, it is pointed out that much of the information and assignment call be done without any calculations at all, using only the qualitative ideas from nonlinear, semiclassical, and quantum mechanics, along with the information supplied by the experimentalist MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000174793100007 L2 - UNIMOLECULAR DISSOCIATION DYNAMICS; QUANTUM; SYSTEMS; DCO((X)OVER-TILDE(2)A'); FUNDAMENTALS; LOCALIZATION; ACETYLENE SO - Journal of Physical Chemistry A 2002 ;106(13):3092-3101 5782 UI - 10532 AU - Jurado-Chichay Z AU - Walker GPL AD - Univ Hawaii, Dept Geol & Geophys, Honolulu, HI 96822, USANatl Autonomous Univ Mexico, Inst Geofis, Coyoacan 04510, DF, MexicoUniv Bristol, Dept Earth Sci, Bristol BS8 1RJ, Avon, EnglandJurado-Chichay, Z, Univ Hawaii, Dept Geol & Geophys, 1680 East West Rd, Honolulu, HI 96822 USA TI - The intensity and magnitude of the Mangaone subgroup plinian eruptions from Okataina Volcanic Centre, New Zealand (vol 111, pg 219, 2001) MH - United Kingdom MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Correction AV - English IS - 0377-0273 UR - ISI:000177308000009 SO - Journal of Volcanology and Geothermal Research 2002 ;116(3-4):361-362 5783 UI - 11216 AU - Kaczmarek M AU - Shih MY AU - Cudney RS AU - Khoo IC AD - Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandPenn State Univ, Dept Elect Engn, University Pk, PA 16802, USACICESE, Div Fis Aplicada, Ensenada 22880, Baja California, MexicoKaczmarek, M, Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England TI - Electrically tunable, optically induced dynamic and permanent gratings in dye-doped liquid crystals AB - We report on further experimental studies of the ac field response of transient and permanent gratings written with visible light in both planar and homeotropic, dye-doped liquid crystal cells. It is found that the diffraction efficiency of these gratings can be controlled by the applied ac field. High ac frequencies can switch off diffraction completely in both permanent and transient gratings. The response time to the applied electric field is shown to be in the range of milliseconds. Permanent gratings persist for months and, when heated above the liquid crystal phase transition temperature, they can be only partially erased. Furthermore, on cooling the diffraction efficiency can be restored, indicating a strong anchoring at the boundaries of the cell MH - United Kingdom MH - Mexico|Baja California MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9197 UR - ISI:000175335000005 L2 - liquid crystals;transient and permanent gratings;ac field enhancement;switching;refractive index change;POLARIZED LASER-LIGHT; SPACE-CHARGE FIELDS; REORIENTATION; NONLINEARITY; ORIENTATION; ALIGNMENT; FULLERENE; FILM SO - Ieee Journal of Quantum Electronics 2002 ;38(5):451-457 5784 UI - 9837 AU - Kaikina E AU - Kato K AU - Naumkin PI AU - Ogawa T AD - Ist Tecnol Morelia, Dept Ciencias Baiscas, Morelia 58120, Michoacan, MexicoSci Univ Tokyo, Dept Math, Shinjuku Ku, Tokyo 1628601, JapanUniv Michoacana, Inst Fis Matemat, Morelia 58040, Michoacan, MexicoKyushu Univ, Grad Sch Math, Fukuoka 8128581, Japan TI - Wellposedness and analytic smoothing effect for the Benjamin-Ono equation MH - Japan MH - Mexico|Michoacan PB - KYOTO: KYOTO UNIV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0034-5318 UR - ISI:000179207100002 L2 - NONLINEAR SCHRODINGER-EQUATIONS; KORTEWEG-DEVRIES EQUATION; INITIAL-VALUE PROBLEM; DE-VRIES EQUATION; CAUCHY-PROBLEM; LOCAL EXISTENCE; REGULARITY; TIME; WAVES SO - Publications of the Research Institute for Mathematical Sciences 2002 ;38(3):651-691 5785 UI - 10966 AU - Kakazey M AU - Sanchez-Mondragon J AU - Gonzalez-Rodriguez G AU - Vlasova M AU - Sreckovic T AU - Nikolic N AU - Ristic MM AD - UAEM, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoSerbian Acad Arts & Sci, Joint Lab Adv Mat, YU-11000 Belgrade, YugoslaviaKakazey, M, UAEM, Ctr Invest Ingn & Ciencias Aplicadas, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Annealing effects in ZnO and ZnO-SnO2 powders during grinding AB - We report on the differences in the defect structure of ZnO particles that take place at the grinding of powders of pure ZnO and mixture ZnO-SnO2. The defect structure formed was studied by electron paramagnetic resonance (EPR). The results demonstrate that a sequential two-stage thermal process contributes to the defect structure during prolonged mechanical treatment (NIT). In the First stage of MT a collective process of break up of individual ZnO particles occurs and the defect structure is caused by hyper-rapid thermal defects annealing (HRTDA) of the particles. The second stage of the process of defect formation is associated with annealing effects caused by the sample heat accumulation. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Morelos MH - Yugoslavia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000176024800002 L2 - annealing;defects;deformation and fracture;electron paramagnetic resonance;powder technology;TRIBOPHYSICAL ACTIVATION; ZINC-OXIDE; EVOLUTION SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2002 ;94(1):8-13 5786 UI - 11512 AU - Kakazey MG AU - Gonzalez-Rodriguez JG AU - Vlasova MV AU - Shanina BD AD - UAEM, FCQI, Ctr Res Engn & Appl Sci, Cuernavaca 62210, Morelos, MexicoInst Semicond Phys NASU, UA-252028 Kiev, UkraineKakazey, MG, UAEM, FCQI, Ctr Res Engn & Appl Sci, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Electron paramagnetic resonance in boron carbide AB - Electron paramagnetic resonance (EPR) signals from powdered samples of boron carbide B4C are recorded at g factor 2.0028+/-0.0002. The dependence on temperature and thermal treatment of the samples is studied. We demonstrated that native defects of boron carbide and conduction electrons are responsible for EPR absorption. The temperature dependence of the EPR line width DeltaB(T) is accounted for via the Korringa mechanism. By fitting experimental and theoretical curves for DeltaB(T), distances of donor levels from the edge of the conduction band DeltaE(d) are obtained. The process of sample preparation strongly effects the value of DeltaE(d). We assume a radical formation of the type B3C with local concentration N(loc)similar to10(19)-2x10(20) cm(-3) is responsible for the EPR signal under these conditions. (C) 2002 American Institute of Physics MH - Mexico|Morelos MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000174663900074 L2 - TRANSPORT SO - Journal of Applied Physics 2002 ;91(7):4438-4446 5787 UI - 7126 AU - Kallberg ME AU - Brooks DE AU - Ellis AE AU - Garcia-Sanchez GA AU - Szabo NJ AU - Samuelson DA AU - Ollivier FJ AU - Komaromy AM AU - Lambrou GN AD - Univ Florida, Coll Vet Med, Gainesville, FL, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoNovartis Ophthalm, Basel, Switzerland TI - Correlation of retinal damage to endothelin-1 levels in aqueous humor and vitreous in dogs with spontaneous hypertensive glaucoma MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606600288 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U61-U61 5788 UI - 11395 AU - Kallberg ME AU - Brooks DE AU - Garcia-Sanchez GA AU - Komaromy AM AU - Szabo NJ AU - Tian LL AD - Univ Florida, Coll Vet Med, Gainesville, FL 32611, USAUniv Florida, Coll Med, Dept Stat, Gainesville, FL, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoBrooks, DE, Univ Florida, Coll Vet Med, Gainesville, FL 32611, USA TI - Endothelin 1 levels in the aqueous humor of dogs with glaucoma AB - Purpose: Endothelin 1 is a small peptide that is involved in regulation of intraocular pressure and modulation of ocular circulation. To investigate the role of endothelin 1 in canine glaucoma, the authors measured aqueous humor levels of endothelin 1 in healthy dogs and in dogs with hypertensive glaucoma. Methods: Aqueous humor samples were obtained with general anesthesia from the eyes of healthy dogs (n = 5) and dogs with hypertensive glaucoma (n = 10). Measurements, were made by enzyme immunoassay for endothelin 1. Results: The endothelin 1 aqueous humor range was 1. 12 - 3.63 pg/mL for healthy dogs and 1.97 - 14.97 pg/mL for glaucomatous dogs. The healthy and glaucomatous canine endothelin I aqueous levels (mean +/- SD) were 2.33 +/- 0.90 and 8.11 +/- 5.03 pg/mL, respectively. A two-way analysis of variance indicated that this difference was significant (P = 0.0084). The effect of age on endothelin 1 levels was not significant (P = 0.6283). The large variability found within the glaucomatous group could be explained by the degree of damage of the retina (P = 0.0006). There was no significant correlation between intraocular pressure and endothelin 1 aqueous humor levels within the glaucomatous group (P = 0.29). Conclusions: The aqueous humor of dogs with hypertensive glaucoma contains significantly higher levels of endothelin 1 than that of healthy dogs MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 34 U4 - Ophthalmology U5 - J;Article AV - English IS - 1057-0829 UR - ISI:000174913000005 L2 - aqueous humor;canine glaucoma;endothelin 1;OPEN-ANGLE GLAUCOMA; TRANSIENT COMPLETE OBSTRUCTION; CILIARY EPITHELIAL-CELLS; VITREOUS BODY; INTRAOCULAR-PRESSURE; RETINAL-VESSELS; ISCHEMIA; RABBITS; PLASMA; EYE SO - Journal of Glaucoma 2002 ;11(2):105-109 5789 UI - 10887 AU - Kalnins EG AU - Williams GC AU - Miller W AU - Pogosyan GS AD - Univ Waikato, Dept Math & Stat, Hamilton, New ZealandUniv Minnesota, Sch Math, Minneapolis, MN 55455, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Theoret Phys Lab, Dubna 141980, Moscow Region, RussiaYerevan State Univ, Int Ctr Adv Studies, Yerevan 375049, ArmeniaKalnins, EG, Univ Waikato, Dept Math & Stat, Hamilton, New Zealand TI - On superintegrable symmetry-breaking potentials in N-dimensional Euclidean space AB - We give a graphical prescription for obtaining and characterizing all separable coordinates for which the Schrodinger equation admits separable solutions for one of the superintegrable potentials V = 1/2Sigma(l=1)(n)[k(l)(2) - 1/4/x(l)(2) + omega(2)x(l)(2)] + 2omega(2)x(n+1)(2) or V = 1/2(2alpha/rootx(1)(2)+...+x(n+1)(2) + Sigma(l=1)(n)1/4 - k(l)(2)/x(l)(2)). Here x(n+1) is a distinguished Cartesian variable. The algebra of second-order symmetries of the resulting Schrodinger equation is given and, for the first potential, the closure relations of the corresponding quadratic algebra. These potentials are particularly interesting because they occur in all dimensions n greater than or equal to 1, the separation of variables problem is highly nontrivial for them, and many other potentials are limiting cases MH - Armenia MH - Mexico|Morelos MH - New Zealand MH - Russia MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176351700011 L2 - MULTISEPARABLE SUPERINTEGRABILITY; COMPLETENESS; SPHERE SO - Journal of Physics A-Mathematical and General 2002 ;35(22):4755-4773 5790 UI - 10888 AU - Kalnins EG AU - Kress JM AU - Miller W AU - Pogosyan GS AD - Univ Waikato, Dept Math, Hamilton, New ZealandUniv Minnesota, Sch Math, Minneapolis, MN 55455, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Theoret Phys Lab, Dubna 141980, Moscow Region, RussiaYerevan State Univ, Int Ctr Adv Studies, Yerevan 375049, ArmeniaKalnins, EG, Univ Waikato, Dept Math, Hamilton, New Zealand TI - Complete sets of invariants for dynamical systems that admit a separation of variables AB - Consider a classical Hamiltonian H in n dimensions consisting of a kinetic energy term plus a potential. If the associated Hamilton-Jacobi equation admits an orthogonal separation of variables, then it is possible to generate algorithmically a canonical basis Q, P where P-1=H, P-2,...,P-n are the other second-order constants of the motion associated with the separable coordinates, and {Q(i),Q(j)}={P-i,P-j}=0, {Q(i),P-j}=delta(ij). The 2n-1 functions Q(2),...,Q(n),P-1,...,P-n form a basis for the invariants. We show how to determine for exactly which spaces and potentials the invariant Q(j) is a polynomial in the original momenta. We shed light on the general question of exactly when the Hamiltonian admits a constant of the motion that is polynomial in the momenta. For n=2 we go further and consider all cases where the Hamilton-Jacobi equation admits a second-order constant of the motion, not necessarily associated with orthogonal separable coordinates, or even separable coordinates at all. In each of these cases we construct an additional constant of the motion. (C) 2002 American Institute of Physics MH - Armenia MH - Mexico|Morelos MH - New Zealand MH - Russia MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000176315000012 L2 - WINTERNITZ SYSTEM; SUPERINTEGRABILITY SO - Journal of Mathematical Physics 2002 ;43(7):3592-3609 5791 UI - 11577 AU - Kaminski N AU - Zuo FR AU - Cojocaro G AU - Yakhini Z AU - Ben-Dor A AU - Morris D AU - Sheppard D AU - Pardo A AU - Selman M AU - Heller RA AD - Chaim Sheba Med Ctr, IL-52621 Tel Hashomer, IsraelRoche Biosci, Palo Alto, CA, USAAgilent Labs, Palo Alto, CA, USALung Biol Ctr, San Francisco, CA, USAUniv Nacl Autonoma Mexico, Fac Sci, Mexico City 04510, DF, MexicoNatl Inst Resp Dis, Mexico City 04510, DF, MexicoKaminski, N, Chaim Sheba Med Ctr, IL-52621 Tel Hashomer, Israel TI - Use of oligonucleotide microarrays to analyze gene expression patterns in pulmonary fibrosis reveals distinct patterns of gene expression in mice and humans MH - Israel MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 5 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000174481400023 SO - Chest 2002 ;121(3):31S-32S 5792 UI - 11316 AU - Kanampiu F AU - Ransom J AU - Gressel J AU - Jewell D AU - Friesen D AU - Grimanelli D AU - Hoisington D AD - Weizmann Inst Sci, IL-76100 Rehovot, IsraelCIMMYT, Nairobi, KenyaCIMMYT, Kathmandu, NepalCIMMYT, Harare, ZimbabweInt Fertilizer Dev Ctr, Muscle Shoals, AL 35662, USACIMMYT, Mexico City 06600, DF, MexicoGressel, J, Weizmann Inst Sci, IL-76100 Rehovot, Israel TI - Appropriateness of biotechnology to African agriculture: Striga and maize as paradigms MH - Israel MH - Kenya MH - Mexico|Distrito Federal MH - Nepal MH - USA MH - Zimbabwe PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Editorial Material AV - English IS - 0167-6857 UR - ISI:000175103000001 L2 - acetolactate synthase;Bt genes;herbicide resistance;legume intercropping;maize;transposons;witchweed;CORN ZEA-MAYS; ACETOLACTATE SYNTHASE; FUSARIUM-OXYSPORUM; SEED-GERMINATION; HERMONTHICA; BIOCONTROL; RESISTANCE; SPP.; HERBICIDES; PARASITISM SO - Plant Cell Tissue and Organ Culture 2002 ;69(2):105-110 5793 UI - 10491 AU - Kaplan IG AU - Dolgounitcheva O AU - Watts JD AU - Ortiz JV AD - Univ Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoKansas State Univ, Dept Chem, Manhattan, KS 66506, USAJackson State Univ, Dept Chem, Jackson, MS 39217, USAKaplan, IG, Univ Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - Nondipole bound anions: Be-2(-) and Be-3(-) AB - Electron affinities (EAs) of beryllium clusters are calculated up to the complete coupled-cluster single double triple (CCSDT) level using reasonably large basis sets with many diffuse functions. At all levels of theory, the obtained values for the adiabatic EA are large enough to be observed with standard photodetachment techniques. The vertical electron detachment energy is 0.341 eV for Be-2(-) and is 1.470 eV for Be-3(-) at the most precise CCSDT level. All studied beryllium anions are valence bound but the nature of binding is different in Be-2(-) and the two Be-3(-) isomers. The only factor of stabilization of the excess electron in Be-2(-) is the relaxation energy. Be-3(-)(D-infinityh) is stabilized by the relaxation energy and the Koopmans electrostatic and exchange energies; in Be-3(-)(D-3h), the main factors of stabilization are the correlation and relaxation energies. As was revealed in our study, in linear molecules the correlation contribution to the electron binding energy is negative, i.e., it decreases the EA. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000177351100016 L2 - MOLECULAR ELECTRONIC-STRUCTURE; GAUSSIAN-BASIS SETS; FULL CCSDT MODEL; BINDING-ENERGIES; GROUND-STATE; BERYLLIUM DIMER; ORBITAL METHODS; EXCITED-STATES; WAVE-FUNCTIONS; NEGATIVE-IONS SO - Journal of Chemical Physics 2002 ;117(8):3687-3693 5794 UI - 11652 AU - Kaplan IG AU - Murrell JN AU - Roszak S AU - Leszczynski J AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoJackson State Univ, Dept Chem, Computat Ctr Mol Struct & Interact, Jackson, MS 39217, USAUniv Sussex, Fac Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandWroclaw Univ Technol, Inst Phys & Theoret Chem, PL-50370 Wroclaw, PolandKaplan, IG, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - Ab initio model potentials for the alkaline-earth trimers Be-3, Mg-3, and Ca-3 AB - Many-body model potentials for Be-3, Mg-3, and Ca-3 clusters have been constructed with parameters fitted to the corresponding ab initio many-body energy surfaces calculated at the MP4 (SDTQ) level. These ab initio model potentials are accurate over a wide range of atom-atom distances, and are suitable for molecular dynamics simulation, collision dynamics, and other physical applications MH - United Kingdom MH - Mexico|Distrito Federal MH - Poland MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000174231800013 L2 - SMALL METAL-CLUSTERS; ELECTRON CORRELATION; NONADDITIVE FORCES; BINDING-ENERGIES; WAVE-FUNCTIONS; BASIS-SET; STABILITY SO - Molecular Physics 2002 ;100(6):843-849 5795 UI - 11716 AU - Kapoor N AU - Russell M AU - Stojmenovic I AU - Zomaya AY AD - Nortel Networks, Ottawa, ON, CanadaUniv Waterloo, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, CanadaUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaUniv Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 04510, DF, MexicoUniv Western Australia, Dept Elect & Elect Engn, Perth, WA 6907, AustraliaKapoor, N, Nortel Networks, Ottawa, ON, Canada TI - A genetic algorithm for finding the pagenumber of interconnection networks AB - A "book-embedding" of a graph G comprises embedding the graph's nodes along the spine of a book and embedding the edges on the pages so that the edges embedded on the same page do not intersect. This is also referred to as the page model. The "pagenumber" of a graph is the thickness of the smallest (in number of pages) book into which G can be embedded. The problem has been studied only for some specific kind of graphs. The pagenumber problem is known to be NP-complete, even if the order of nodes on the spine is fixed. Using genetic algorithms, we describe the first algorithm for solving the pagenumber problem that can be applied on arbitrary graphs. Experimental results for several kinds of graphs are obtained. We were particularly interested in graphs that correspond to some well-known interconnection networks (such as hypercubes and meshes). We also introduced and experimented with 2-D pagenumber model for embedding graphs. (C) 2002 Elsevier Science (USA) MH - Australia MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0743-7315 UR - ISI:000174103000006 L2 - GENUS-G GRAPHS; SETS SO - Journal of Parallel and Distributed Computing 2002 ;62(2):267-283 5796 UI - 9873 AU - Kapoor P AU - Pathak A AU - Kapoor R AU - Venugopalan P AU - Corbella M AU - Rodriguez M AU - Robles J AU - Llobet A AD - Punjabi Univ, Dept Chem, Chandigarh 160014, IndiaUniv Barcelona, Dept Quim Inorgan, E-08028 Barcelona, SpainUniv Girona, Dept Quim, E-17071 Girona, SpainUniv Girona, Inst Quim Computat, E-17071 Girona, SpainUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoLlobet, A, Punjabi Univ, Dept Chem, Chandigarh 160014, India TI - Structural, electronic, and magnetic consequences of O-carbonyl vs O-alkoxy ester coordination in new dicopper complexes containing the Cu-2(mu-Cl)(2) core AB - The complexes [Cu-2(mu-Cl)(2)(Cl)(2)(L)(2)] (L = dialkylpyridine-2,6-dicarboxylate; R = Et, L = depc, 1; R = i-Pr, L = dppc, 2) have been prepared and their magnetic properties studied. The crystal structures of complexes 1 and 2 have been solved. Compound 1 belongs to the P1 space group with Z = 2, a = 8.3020(10) Angstrom, b = 9.2050(10) Angstrom, c = 10.065(2) Angstrom, a = 99.040(10)degrees, beta = 100.810(10)degrees, and gamma = 106.502(10)degrees whereas 2 belongs to the C2/c space group with Z = 8, a = 11.6360(10) Angstrom, b = 25.906(3) Angstrom, c = 11.76579(10) Angstrom, and beta = 107.900(10)degrees. The different alkyl ester substitutes produce substantial structural and electronic differences. The Cu2Cl2 core geometry is planar for 1 whereas it adopts a butterfly shape in the case of 2. Furthermore, in 2 the dppc ligand coordinates only by the carbonyl oxygen atoms whereas in 1 the depc ligand coordinates through carbonyl and alkoxy oxygen atoms. Magnetic susceptibility data show a ferromagnetic coupling between the two Cu(II) centers in both cases (J = 39.9(6) cm(-1) for 1, and J = 51.3(5) cm(-1) for 2) with very weak antiferromagnetic interactions (J' = -0.59 cm(-1) and -0.57 cm(-1) for 1 and 2, respectively). Theoretical calculations at the extended Huckel level have also been carried out to further understand the electronic nature of complexes 1 and 2 MH - India MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000179184200035 L2 - DIMERS; MO SO - Inorganic Chemistry 2002 ;41(23):6153-6160 5797 UI - 10016 AU - Karamysheva TV AU - Andreenkova OV AU - Bochkaerev MN AU - Borissov YM AU - Bogdanchikova N AU - Borodin PM AU - Rubtsov NB AD - Russian Acad Sci, Inst Cytol & Genet, SB, Novosibirsk 6300090, RussiaUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoNovosibirsk State Univ, Dept Cytol & Genet, Novosibirsk 630090, RussiaRubtsov, NB, Russian Acad Sci, Inst Cytol & Genet, SB, Lavrentjev Av 10, Novosibirsk 6300090, Russia TI - B chromosomes of Korean field mouse Apodemus peninsulae(Rodentia, Murinae) analysed by microdissection and FISH AB - Organization of B chromosomes in the Korean field mouse Apodemuspeninsulae was analyzed. We painted its metaphase chromosomes with whole and partial chromosome paints generated by microdissection and DOP-PCR. The results of the painting indicated that all B chromosomes contained a large amount of repeated DNA sequences. The repeats could be classified in terms of their homology and predominant location. Pericentromeric repeats of B chromosomes were present in many copies in pericentromeric C-blocks of all autosomes and in non-centromeric C-blocks of the sex chromosomes. B arm specific type I repeats comprised the main body of the arms of almost all B chromosomes and were present in the arms of A chromosomes as interspersed sequences. B arm-specific type 2 repeats were found at the ends of some B chromosomes that did not undergo compaction at the interphasemetaphase transition and remained uncondensed. On the basis of comparative analysis of localization of B chromosome repeats in the chromosomes of two related species, A. peninsulae and A. agrarius, we suggest a hypothesis of B chromosome origin and evolution in the genus Apodemus. Copyright (C) 2002 S. KargerAG, Basel MH - Mexico|Baja California MH - Russia PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 10 U4 - Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1424-8581 UR - ISI:000178731700021 L2 - BRACHYCOME-DICHROMOSOMATICA; FLAVICOLLIS RODENTIA; MOLECULAR ANALYSIS; CREPIS-CAPILLARIS; SEQUENCE; ORIGIN; MAMMALIA; HYBRIDIZATION; ORGANIZATION; BEHAVIOR SO - Cytogenetic and Genome Research 2002 ;96(1-4):154-160 5798 UI - 11902 AU - Karlovich AY AU - Karlovich YI AD - Inst Super Tecn, Dept Matemat, P-1049001 Lisbon, PortugalInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoKarlovich, AY, Inst Super Tecn, Dept Matemat, Av Rovisco Pais, P-1049001 Lisbon, Portugal TI - One-sided invertibility of binomial functional operators with a shift on rearrangement-invariant spaces AB - Let Gamma be an oriented Jordan smooth curve and alpha a diffeomorphism of Gamma onto itself which has an arbitrary nonempty set of periodic points. We prove criteria for one-sided invertibility of the binomial functional operator A = aI - bW where a and b are continuous functions, I is the identity operator, W is the shift operator, Wf = f circle a, on a reflexive rearrangement- invariant space X (Gamma) with Boyd indices alpha(X),beta(X) and Zippin indices p(X), q(X) satisfying inequalities 0 < α(X) = p(X) &LE; q(X) = β(X) < 1 MH - Mexico|Distrito Federal MH - Portugal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000173515700006 SO - Integral Equations and Operator Theory 2002 ;42(2):201-228 5799 UI - 12081 AU - Karp PD AU - Riley M AU - Saier M AU - Paulsen IT AU - Collado-Vides J AU - Paley SM AU - Pellegrini-Toole A AU - Bonavides C AU - Gama-Castro S AD - SRI Int, Bioinformat Res Grp, Menlo Pk, CA 94025, USAMarine Biol Lab, Woods Hole, MA 02543, USAUniv Calif San Diego, Dept Biol, La Jolla, CA 92093, USAInst Genome Res, Rockville, MD 20850, USAUNAM, Ctr Invest Sobre Fijac Nitrogeno, Programa Biol Mol Computac, Cuernavaca 62100, Morelos, MexicoKarp, PD, SRI Int, Bioinformat Res Grp, 333 Ravenswood Ave EK207, Menlo Pk, CA 94025 USA TI - The EcoCyc database AB - EcoCyc is an organism-specific pathway/genome database that describes the metabolic and signal-transduction pathways of Escherichia coli, its enzymes, its transport proteins and its mechanisms of transcriptional control of gene expression. EcoCyc is queried using the Pathway Tools graphical user interface, which provides a wide variety of query operations and visualization tools. EcoCyc is available at http://ecocyc.org/ MH - USA MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 182 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000173077100013 SO - Nucleic Acids Research 2002 ;30(1):56-58 5800 UI - 11475 AU - Kaufer-Horwitz M AU - Bermudez OI AU - Valdes-Ramos R AU - Anderson AS AU - Solomons NW AD - Inst Nacl Perinatol, Subdirecc Invest Salud Publ, Mexico City 11000, DF, MexicoTufts Univ, USDA, Human Nutr Res Ctr Aging, Boston, MA 02111, USAUniv Dundee, Dundee DD1 4HN, ScotlandCtr Studies Sensory Impairment Aging & Metab, Guatemala City, Guatemala TI - Variant emblems derived from national Dietary Guidelines: Are they helpful or confusing? MH - Guatemala MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533603621 SO - Faseb Journal 2002 ;16(4):A652-A652 5801 UI - 11684 AU - Kaufman M AU - Sheth K AU - Struck C AU - Elmegreen BG AU - Thomasson M AU - Elmegreen DM AU - Brinks E AD - Ohio State Univ, Dept Phys, Columbus, OH 43210, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAIowa State Univ, Dept Phys & Astron, Ames, IA 50010, USAIBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598, USAOnsala Space Observ, SE-43992 Onsala, SwedenVassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoKaufman, M, Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA TI - CO observations of the interacting galaxy pair NGC 5394/95 AB - BIMA (CO)-C-12 J = 1-->0 observations are presented of the spiral galaxies NGC 5394 and NGC 5395 that have undergone a recent, grazing encounter. In NGC 5394 approximately 80% of the CO emission detected by BIMA is concentrated in the central 800 pc (FWHM) starburst region, and the rest is from a portion of the inner disk south and west of the central starburst. In an encounter simulation that reproduces some of the main features of this galaxy pair, a considerable amount of gas in NGC 5394 falls into the central region early in the collision. The observed total gas distribution in the disk of NGC 5394 is lopsided, with more H I CO, and Halpha emission coming from the western or southwestern side. The innermost western arm of NGC 5394 is seen in CO and Halpha emission, but the eastern inner-disk arm, which is very bright in the optical continuum, is not detected in CO or Halpha emission. The NGC 5394 starburst region is similar in radio continuum luminosity and size to the M82 starburst and has a CO luminosity similar to4 times greater. A CO position-velocity diagram of the NGC 5394 nucleus reveals two separate velocity features very close to the center. This may indicate a nuclear ring or the "twin peaks" of an ILR or some depletion of (CO)-C-12 J = 1-->0 at the nucleus. From a comparison of the radio continuum, Halpha, 60 mum, and CO luminosities, we estimate that the average extinction A(v) of the starburst nucleus is 3-4 mag, the star formation rate is similar to6 M-circle dot yr(-1), and the conversion factor N(H-2)/I-CO in the starburst is a factor of 3-4 below the standard value. Comparison of NGC 5394 with two other systems previously studied suggests that in prograde grazing encounters a central starburst may not develop until near the end of the ocular phase. Very little of the CO emission from NGC 5395 found in previous single-dish observations is detected in the BIMA data; thus molecular gas in NGC 5395 does not appear to be strongly concentrated in compressed ridges MH - USA MH - Mexico|Guanajuato MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000174210800009 L2 - galaxies : individual (NGC 5394/95);galaxies : interactions;galaxies : ISM;galaxies : starburst;SPIRAL GALAXIES; MOLECULAR GAS; STAR-FORMATION; GALACTIC-CENTER; OCULAR GALAXY; M82; EMISSION; NGC-2207; IC-2163; REGIONS SO - Astronomical Journal 2002 ;123(2):702-719 5802 UI - 10430 AU - Kawasaki L AU - Sanchez O AU - Shiozaki K AU - Aguirre J AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoUniv Calif Davis, Microbiol Sect, Davis, CA, USAAguirre, J, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-242, Mexico City 04510, DF, Mexico TI - SakA MAP kinase is involved in stress signal transduction, sexual development and spore viability in Aspergillus nidulans AB - In eukaryotic cells, environmental stress signals are transmitted by evolutionarily conserved MAPKs, such as Hog1 in the budding yeast Saccharomyces cerevisiae, Spc1 in the fission yeast Schizosaccharomyces pombe and p38/JNK in mammalian cells. Here, we report the identification of the Aspergillus nidulans sakA gene, which encodes a member of the stress MAPK family. The sakA gene is able to complement the S. pombe spc1(-) defects in both osmo-regulation and cell cycle progression. Moreover, SakA MAPK is activated in response to osmotic and oxidative stress in both S. pombe and A. nidulans. However, in contrast to hog1 and spc1 mutants, the sakA null mutant is not sensitive to high osmolarity stress, indicating a different regulation of the osmostress response in this fungus. On the other hand, the DeltasakA mutant shows development and cell-specific phenotypes. First, it displays premature steA-dependent sexual development. Second, DeltasakA mutant produces asexual spores that are highly sensitive to oxidative and heat shock stress and lose viability upon storage. Indeed, SakA is transiently activated early after induction of conidiation. Our results indicate that SakA MAPK is involved in stress signal transduction and repression of sexual development, and is required for spore stress resistance and survival MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 45 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000177523700023 L2 - ACTIVATED PROTEIN-KINASE; ATF1 TRANSCRIPTION FACTOR; CELL-CYCLE CONTROL; FISSION YEAST; SACCHAROMYCES-CEREVISIAE; SCHIZOSACCHAROMYCES-POMBE; OXIDATIVE STRESS; CATALASE GENES; PATHWAY; CASCADES SO - Molecular Microbiology 2002 ;45(4):1153-1163 5803 UI - 10658 AU - Kaya C AU - Ak BE AU - Higgs D AU - Murillo-Amador B AD - Univ Harran, Fac Agr, Dept Hort, TR-63200 Sanliurfa, TurkeyUniv Hertfordshire, Hatfield AL10 9AB, Herts, EnglandCtr Invest Biol Noroeste, La Paz 23090, Baja Calif Sur, MexicoKaya, C, Univ Harran, Fac Agr, Dept Hort, TR-63200 Sanliurfa, Turkey TI - Influence of foliar-applied calcium nitrate on strawberry plants grown under salt-stressed conditions AB - A pot experiment was carried out with strawberry (Fragaria x ananassa Duch) cultivars Oso Grande and Camarosa in sand culture to investigate the effects of foliar-applied calcium nitrate [Ca(NO3)(2)] to plants grown at high salinity (NaCl, 35 mmol/L). Treatments were (i) nutrient solution alone (C), (ii) nutrient solution + Ca(NO3)(2) (9 mmol/L) as a foliar application (C+Fo), (iii) nutrient solution + NaCl (35 mmol/L) (C+S) and (iv) nutrient solution + NaCl (35 mmol/L) + Ca(NO3)(2) (9 mmol/L) as a foliar application twice weekly (C+S+Fo). The plants grown at high NaCl had less dry matter and lower fruit yield and chlorophyll content than those grown in normal nutrient solution for both cultivars. Foliar Ca(NO3) 2 sprays ameliorated the negative effects of salinity on plant growth, chlorophyll content and fruit yield. Membrane permeability increased with high NaCl and was reduced by Ca(NO3)(2) sprays. Sodium concentration in plant tissues increased in both cultivars in the high NaCl treatment. Concentrations of calcium and nitrogen were much lower in plants grown in high NaCl than in unstressed plants and foliar Ca(NO3)(2) sprays increased concentrations of both nutrients MH - United Kingdom MH - Mexico|Baja California Sur MH - Turkey PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0816-1089 UR - ISI:000177009400014 L2 - salinity;membrane permeability;strawberry;Fragaria x ananassa;ORYZA-SATIVA-L; SODIUM-CHLORIDE STRESS; DRY-MATTER YIELD; SALINITY TOLERANCE; NACL SALINITY; TOMATO; ACCUMULATION; PHOSPHORUS; POTASSIUM; SEEDLINGS SO - Australian Journal of Experimental Agriculture 2002 ;42(5):631-636 5804 UI - 10204 AU - Kaziev GZ AU - Quinones SH AU - Bel'skii VK AU - Zavodnik VI AU - Osminkina IV AU - Perez TH AD - Moscow State Pedag Univ, Moscow 119882, RussiaUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaKaziev, GZ, Moscow State Pedag Univ, Malaya Pirogovskaya 1, Moscow 119882, Russia TI - Synthesis and study of aluminum hexamolybdenocobaltate(III) and hexamolybdenochromate(III) AB - Aluminum hexamolybdenocobaltate and hexamolybdenochromate of the Al[MMo6O18(OH)(6)].16H(2)O composition, where M = Co(III) or Cr(III), were synthesized for the first time. X-ray diffraction study shows that the crystals of the compounds are triclinic; space group PL, Z = 1, and P-calcd = 2.665 and 2.611 g/cm(3), respectively. The compounds were studied by IR spectroscopy and thermogravimetry MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1070-3284 UR - ISI:000178260900006 SO - Russian Journal of Coordination Chemistry 2002 ;28(9):635-637 5805 UI - 11315 AU - Kaziev GZ AU - Qignones SO AU - Bel'skii VK AU - Zavodnik VE AU - Osminkina IV AU - de Ita A AD - Moscow State Pedag Univ, Moscow 119435, RussiaUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoRussian Acad Sci, Karpov Inst Phys Chem, Moscow, RussiaKaziev, GZ, Moscow State Pedag Univ, Moscow 119435, Russia TI - Synthesis and study of gallium hexamolybdochromate(III) AB - Gallium hexamolybdochromate(III), Ga[CrMo6O18(OH)(6)] (.) 16H(2)O, was synthesized. The crystals of the compound are triclinic, space group P1, Z = 1. The unit cell parameters are a = 6.810(1) Angstrom, b = 11.279(2) Angstrom, c = 11.643(2) Angstrom, alpha = 101.33(3)degrees, beta = 96.97(3)degrees, gamma = 101.94(3)degrees, V = 845.6(2) Angstrom(3), d(cacid) = 2.706 g/cm(3). The IR spectroscopical and thermogravimetric studies were conducted MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0036-0236 UR - ISI:000175064800006 SO - Russian Journal of Inorganic Chemistry 2002 ;47(3):335-340 5806 UI - 11780 AU - Kaziev GZ AU - Quignones SO AU - Bel'skii VK AU - Zavodnik VE AU - Osminkina IV AD - Moscow State Pedag Univ, Moscow 119435, RussiaMexico Natl Univ, Mexico City, DF, MexicoState Sci Ctr Russian Fed, Karpov Inst Phys Chem, Moscow 103064, RussiaKaziev, GZ, Moscow State Pedag Univ, Moscow 119435, Russia TI - Synthesis, thermal analysis, IR spectra, and crystal structure of gallium hexamolybdorhodate(III) AB - Gallium hexamolybdorhodate(III), Ga[RhMo6O18(OH)(6)] . 16H(2)O (I), was synthesized and studied by X-ray diffraction. Crystals of I are triclinic: space group P1, a 6.809(1) Angstrom, b = 11.27](2) Angstrom, c = 11.665(2) Angstrom, alpha = 10 1.27(2)0, beta = 96.94(2)0, gamma = 101.83(2)degrees, Z = 1, d(calcd) 2.796 g/cm(3). Compound I was studied by thermal analysis and IR spectroscopy MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0036-0236 UR - ISI:000173822600004 SO - Russian Journal of Inorganic Chemistry 2002 ;47(1):14-18 5807 UI - 11310 AU - Keesling J AU - Montejano L AU - Venema G AD - Calvin Coll, Dept Math, Grand Rapids, MI 49546, USANatl Autonomous Univ Mexico, Inst Math, Mexico City 04510, DF, MexicoUniv Florida, Dept Math, Gainesville, FL 32611, USAVenema, G, Calvin Coll, Dept Math, 3201 Burton St SE, Grand Rapids, MI 49546 USA TI - The mathematics of T. Benny Rushing MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Biographical-Item AV - English IS - 0166-8641 UR - ISI:000175113400001 SO - Topology and Its Applications 2002 ;120(1-2):1-7 5808 UI - 10104 AU - Kelly LM AU - Almeda F AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoCalif Acad Sci, Dept Bot, San Francisco, CA 94118, USAKelly, LM, Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Apartado Postal 70-233, Mexico City 04510, DF, Mexico TI - Three new species of Symplocos (Symplocaceae) from Panama and Costa Rica AB - Three species of Symplocos are newly described from Panama and Costa Rica. Symplocos morii Almeda & L. Kelly, known from high-elevation western Panama, is distinguished by coriaceous leaves with entire and revolute margins, short, glabrous styles, and white fruits. Symplocos naniflora L. Kelly & Almeda is a low-elevation Costa Rican species with serrate leaf margins, small flowers, densely villous styles, and small fruits. Symplocos elliptica L. Kelly & Almeda, known from Cerro Hornito and Cerro Sapo, Panama, is distinguished by broadly elliptic leaves with crenate-denticulate margins and solitary flowers. All three species are likely members of Symplocos sect. Symplocastrum Brand based on their basally connate stamens that are adnate to the petals MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000178421700011 L2 - Costa Rica;Panama;Symplocaceae;Symplocos SO - Novon 2002 ;12(3):369-374 5809 UI - 10795 AU - Kemp SN AU - Bates B AU - Beckman JE AU - Killow CJ AU - Barrena R AU - Kennedy DC AU - Alamo JR AD - Inst Astron & Meteorol, Guadalajara 44130, Jalisco, MexicoInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainQueens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North IrelandKemp, SN, Inst Astron & Meteorol, Av Vallarta 2602,Col Arcos Vallarta, Guadalajara 44130, Jalisco, Mexico TI - A study of the behaviour of the Na I/K I column density ratio in the interstellar medium using the Na ultraviolet doublet AB - Here we make a new study of the behaviour of the Na i/K i column density ratio in the interstellar medium, using a sample of new observations of 28 stars obtained at the Nordic Optical Telescope (NOT) in 1996 and 1997, and previously published observations (obtained by some of the authors) of 21 stars. The sightlines cover a range of distances and directions, including into the Galactic halo. We make use of new observations of the Na i ultraviolet (UV) doublet for some 18 stars. This doublet is much weaker than the Na i D doublet and so is less susceptible to saturation effects, and it is well known that it can be used to obtain more accurate Na i column densities with a smaller error range. We find an average N (Na i)/N (K i) ratio from the Na i UV data of about 90, which is rather higher than that found previously by Hobbs and Lequeux. The Na UV-K i ratio shows a small increase in value with increasing column density, while we also find a sample of low N (Na i)/N (K i) ratio clouds generally seen towards distant objects on high-latitude sightlines that reach into the halo, so that the ratio decreases more sharply at lower column densities. As the values of the ratio for these halo clouds (10-20) bracket the cosmic Na/K abundance ratio, we suggest that these ratios result from a harder radiation field in the lower halo, such that the ionized fractions of Na i and K i become similar. Clearly caution needs to be applied in using any kind of 'standard value' for the Na i/K i column density ratio MH - Mexico|Jalisco MH - United Kingdom MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000176530400008 L2 - ISM : atoms;ISM : clouds;ISM : general;ISM : structure;CRUTCHER COLD CLOUD; GLOBULAR-CLUSTER M4; H-I; PHYSICAL CONDITIONS; UV SPECTROSCOPY; STARS; GAS; ABSORPTION; DIRECTION; IONIZATION SO - Monthly Notices of the Royal Astronomical Society 2002 ;333(3):561-574 5810 UI - 11675 AU - Keppie DF AU - Kepple JD AU - Murphy JB AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSt Francis Xavier Univ, Dept Geol, Antigonish, NS B2G 2W5, CanadaKepple, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Saddle reef auriferous veins in a conical fold termination (Oldham anticline, Meguma terrane, Nova Scotia, Canada): reconciliation of structural and age data AB - Many auriferous veins dated at similar to370 Ma in the Meguma terrane of Nova Scotia are concentrated in tight domes, and conical fold hinges that are transected by 378 Ma low-pressure and high-temperature metamorphic isograds and 380-370 Ma granitoid plutons. Published experiments suggest that such folds are diachronous initiating at inhomogeneities and propagating both in amplitude and along their length. Thus fold terminations are typically conical in geometry and record only the youngest increment of folding. The northeastern termination of the Oldham anticline is characterized by (1) a conical fold, (2) saddle reef auriferous veins, (3) divergent and convergent cleavage fans, (4) a downdip lineation on the slaty cleavage defined by biotitic mineral aggregates inferred to have developed during fold growth. The age of the biotitic mineral aggregates is bracketed between peak metamorphism at > 600degreesC, defined by a nearly concordant 378 Ma U-Pb monazite age from a xenolith in lamprophyre dyke, and similar to366 Ma Ar-40/Ar-39 muscovite-biotite ages, recording cooling through similar to400-300degreesC. This suggests that the conical termination of the Oldham anticline grew between 378 and 366 Ma, an observation that reconciles the empirical structural control of the saddle reef auriferous veins with the similar to370 Ma age dating of vein minerals. Application of this conclusion to saddle reef auriferous veins in domes suggests that mineralization was related to the youngest increment of fold amplification MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0008-4077 UR - ISI:000174216000005 L2 - LODE GOLD DEPOSITS; NORTHERN APPALACHIANS; CONSTRAINTS; DURATION; EXAMPLE; SLATES; MODEL; ROCKS; ZONE SO - Canadian Journal of Earth Sciences 2002 ;39(1):53-63 5811 UI - 11093 AU - Kerp J AU - Walter F AU - Brinks E AD - Univ Bonn, Inst Radioastron, D-53121 Bonn, GermanyCALTECH, Dept Astron, Pasadena, CA 91125, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoKerp, J, Univ Bonn, Inst Radioastron, Hugel 71, D-53121 Bonn, Germany TI - ROSAT X-ray observations of the dwarf galaxy Holmberg II AB - We present a study of the irregular dwarf galaxy Holmberg II based on ROSAT Position Sensitive Proportional Counter observations ( total exposure time: 22 ks). Holmberg II is a nearby (3.2 Mpc), well-studied dwarf irregular galaxy. It is famous for its interstellar medium ( ISM), which is dominated by expanding structures such as H I holes and shells. We search for X-ray emission from point sources as well as for diffuse emission, down to the detection limit of the ROSAT data. Using X-ray hardness ratio diagrams we differentiate between thermal plasma and power-law X-ray spectra, which helps to determine the nature of the individual sources. Correlating the X-ray data with complementary observations ranging from the far-ultraviolet to the radio regime, we increase the probability of correctly identifying sources belonging to Holmberg II. We did not detect soft X-ray emission originating from hot gas within supergiant H I shells above our luminosity sensitivity limit of L-limit (0.1-2.1 keV) greater than or equal to 10(37) ergs s(-1). This finding can probably be attributed to blowout in the case of the largest holes and insufficient sensitivity (owing to strong photoelectric absorption) in the case of the smaller H I holes. However, we find faint X-ray sources well beyond the stellar body but within the H I distribution of Holmberg II, which suggests the presence of X-ray binaries. This indicates that star formation has taken place across the entire gaseous disk of Holmberg II in the past, some of which may have created the structures seen in the ISM at large galactocentric radii MH - Germany MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175830800019 L2 - galaxies : dwarf;galaxies : individual (Holmberg II);galaxies : ISM;X-rays;LARGE-MAGELLANIC-CLOUD; INTERSTELLAR-MEDIUM; SUPERNOVA-REMNANTS; SUPERBUBBLES; EMISSION; BUBBLE; HOLES SO - Astrophysical Journal 2002 ;571(2):809-817 5812 UI - 11650 AU - Kharchenko VK AD - Univ Nacl Autonoma Mexico, Cuautitlan 54768, Estado Mexico, MexicoRussian Acad Sci, Inst Math, Novosibirsk 630090, RussiaKharchenko, VK, Univ Nacl Autonoma Mexico, Cuautitlan 54768, Estado Mexico, Mexico TI - A combinatorial approach to the quantification of Lie algebras AB - We propose a notion of a quantum universal enveloping algebra for any Lie algebra defined by generators and relations which is based on the quantum Lie operation concept. This enveloping algebra has a PBW basis that admits a monomial crystallization by means of the Kashiwara idea. We describe all skew primitive elements of the quantum universal enveloping algebras for the classical nilpotent algebras of the infinite series defined by the Serre relations and prove that the above set of PBW-generators for each of these enveloping algebras coincides with the Lalonde-Ram basis of the ground Lie algebra with a skew commutator in place of the Lie operation. The similar statement is valid for Hall-Shirshov basis of any Lie algebra defined by one relation, but it is not so in the general case MH - Mexico|Estado De Mexico MH - Russia PB - BERKELEY: PACIFIC JOURNAL MATHEMATICS RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0030-8730 UR - ISI:000174179600009 L2 - UNIVERSAL ENVELOPING-ALGEBRAS; HOPF-ALGEBRAS; CRYSTAL BASES; Q-ANALOG; QUANTUM SO - Pacific Journal of Mathematics 2002 ;203(1):191-233 5813 UI - 10156 AU - Kharisov BI AU - Blanco LM AU - Burlov AS AU - Kuznetsova LI AU - Elizondo NV AU - Uraev AI AU - Kurbatov VP AU - Bondarenko GI AU - Garnovskii AD AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas De Los Garza 66450, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov Na Donu 344090, RussiaKharisov, BI, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, NL AP 18-F, San Nicolas De Los Garza 66450, Mexico TI - Trinuclear metal chelates of beta-aminovinylimines AB - The chemical and electrochemical synthesis of trinuclear metal chelates of Cu(II), Ni(II), Co(II), Zn(II), and Cd(II) with a new tetradentate ligand system bis-[(2-oxy, -mercapto, N-tosylamino)anyls] of nitro- and phenylmalondialdehyde was carried out. Magnetic and EPR-spectral data showed that the spin-spin exchange interactions of the antiferromagnetic type between copper ions possess inner- and intermolecular character and depend on the composition of the coordination unit, the nature of the substituent in the malondialdehyde fragment, and the synthetic technique applied. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000178229900001 L2 - trinuclear metal chelates;beta-aminovinylimines;chemical and electrochemical synthesis;CONFIGURATIONAL RIGIDITY; MAGNETIC-PROPERTIES; COMPLEXES; COPPER(II); STEREOCHEMISTRY; NICKEL(II); MODEL SO - Polyhedron 2002 ;21(21):2081-2088 5814 UI - 10490 AU - Kharisov BI AU - Mendez-Rojas MA AU - Garnovskii AD AU - Ivakhnenko EP AU - Ortiz-Mendez U AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas De Los Garza 66450, Nuevo Leon, MexicoUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Hidalgo, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov Na Donu 344090, RussiaUniv Autonoma Nuevo Leon, FIME, San Nicolas De Los Garza 66450, Nuevo Leon, MexicoKharisov, BI, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Apdo Postal 18-F,Ciudad Univ, San Nicolas De Los Garza 66450, Nuevo Leon, Mexico TI - Review: Coordination chemistry of o-quinone complexes AB - The structural and tautomeric peculiarities, as well as physical/chemical properties of transition metal complexes with o-quinones are reviewed. Synthetic routes for obtaining these complexes starting from different sources (elemental metals, metal carbonyls, salts, and metal complexes) are described and tabulated. The free-radical properties of metal-o-quinone complexes are discussed MH - Mexico|Hidalgo MH - Mexico|Nuevo Leon MH - Russia PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0095-8972 UR - ISI:000177398000003 L2 - o-quinones;o-semiquinones;coordination chemistry;free-radical processes;TRANSITION-METAL-COMPLEXES; ONE-ELECTRON TRANSFER; PERFORMANCE LIQUID-CHROMATOGRAPHY; ORTHO-SEMIQUINONE COMPLEXES; MAGNETIC-PROPERTIES; CHARGE-DISTRIBUTION; STRUCTURAL CHARACTERIZATION; ELECTROCHEMICAL DETECTION; RADICAL LIGANDS; SCHIFF-BASE SO - Journal of Coordination Chemistry 2002 ;55(7):745-770 5815 UI - 11718 AU - Khasanov SS AU - Perez-Benitez A AU - Narymbetov BZ AU - Zorina LV AU - Shibaeva RP AU - Singleton J AU - Klehe AK AU - Laukhin VN AU - Vidal-Gancedo J AU - Veciana J AU - Canadell E AU - Rovira C AD - CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainRussian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, MD, RussiaUniv Autonoma Puebla, Puebla 72570, MexicoUniv Oxford, Clarendon Lab, Oxford OX1 3PU, EnglandRussian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, MD, RussiaRovira, C, CSIC, Inst Ciencia Mat Barcelona, Campus Univ Bellaterra, E-08193 Barcelona, Spain TI - Interesting transport and magnetic properties in a new family of molecular materials based on the organic donor BET-TTF and the perrhenate anion AB - Three completely different salts, (BET-TTF) ReO4 (1), (BET-TTF)(3)(ReO4)(2) (2), and (BET-TTF)(9)(ReO4)(4).2(THF) (3) are obtained by small variations in the electrocrystallization conditions of bis(ethylenethio)tetrathiafulvalene (BET-TTF) with the ReO4- ion. The crystal structures of the three salts show strong differences between them. In salt 1, the completely ionic BET-TTF stacks, running along the a direction, are not regular but are forming weak dimers. Two different radical cation layers configure salt 2 and the analysis of the bond-length of BET-TTF molecules forming layers 1 and 2 shows that the beta-like layer 1 has mixed valence character, while layer 2 can be regarded as an anion-cation-anion [ReO4 (BET-TTF)ReO4](-) sandwich layer with completely ionised BET-TTF. Only one beta-like layer that consists of two different mixed valence stacks forms salt 3. Conductivity measurements show that mixed valence salts 2 and 3 are metals with a metal-semiconductor transition around 125 K and 75 K respectively whereas the completely ionised salt 1 is, as expected, a semiconductor. The effect of high quasi-hydrostatic pressure and magnetic field on the transport properties of salt 3 has also been studied. The relationship between the crystal structure and the transport properties of all three salts has been analysed by means of tight binding band structure calculations. These calculations show that layer 1 is responsible for metallic conductivity of salt 2 whereas in layer 2 the electrons are localised. EPR data of this salt indicate that there is an appreciable interaction between delocalised electrons in layer 1 and localised magnetic moments in layer 2 MH - United Kingdom MH - Mexico|Puebla MH - Russia MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000174034000008 L2 - CHARGE-TRANSFER SALTS; METALLIC CONDUCTIVITY; PHYSICAL-PROPERTIES; SUPERCONDUCTOR; CONDUCTORS; BIS(ETHYLENETHIO)TETRATHIAFULVALENE; SERIES; FIELD; CHAIN SO - Journal of Materials Chemistry 2002 ;12(3):432-441 5816 UI - 9492 AU - Khomenkova L AU - Korsunska N AU - Torchynska T AU - Yukhimchuk V AU - Jumayev B AU - Many A AU - Goldstein Y AU - Savir E AU - Jedrzejewski J AD - Natl Acad Sci Ukraine, Inst Semicond Phys, UA-03028 Kiev, UkraineUPAIM, Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelKhomenkova, L, Natl Acad Sci Ukraine, Inst Semicond Phys, 45 Prospect Nauky, UA-03028 Kiev, Ukraine TI - Defect-related luminescence of Si/SiO2 layers AB - Photoluminescence (PL), photoluminescence excitation (PLE), and Raman spectra of Si-SiOx, layers were measured a; a function of Si content. Samples were prepared by co-sputtering of Si and SiO2 and post-annealing. The average size of Si nanoparticles was estimated from Raman measurements. It was shown that, in general, the PL spectra consist of two bands with maxima in the 'red' and green spectral ranges. The 'red' PL band is complex and contains two (IR and red (R)) components. The shift of the peak position of the IR component from 1.38 to 1.54 eV correlates with the decrease of the Si nanoparticle size from 5 to 2.7 nm. It was shown that this PL component could be ascribed to carrier recombination in silicon nanoparticles, The. R component of the 'red' band as well as the 'green' band have similar dependences of the peak positions and intensities on the Si content and can be ascribed to defect-related luminescence. It was concluded that the light absorption in silicon nanocrystallites plays the main role in PLE process. Hot-carrier participation in the excitation of defect-related bands was deduced MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000180091100072 L2 - VISIBLE PHOTOLUMINESCENCE; SI NANOCRYSTALS; SILICON SO - Journal of Physics-Condensed Matter 2002 ;14(48):13217-13221 5817 UI - 10599 AU - Khrapunov S AU - Pastor N AU - Brenowitz M AD - Albert Einstein Coll Med, Dept Biochem, Bronx, NY 10461, USAUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoKhrapunov, S, Albert Einstein Coll Med, Dept Biochem, 1300 Morris Pk Ave, Bronx, NY 10461 USA TI - Solution structural studies of the Saccharomyces cerevisiae TATA binding protein (TBP) AB - The intrinsic fluorescence of the six tyrosines located within the C-terminal domain of the Saccharomyces cerevisiae TATA binding protein (TBP) and the single tryptophan located in the N-terminal domain has been used to separately probe the structural changes associated with each domain upon DNA binding or oligomerization of the protein. The unusually short-wavelength maximum of TBP fluorescence is shown to reflect the unusually high quantum yield of the tyrosine residues in TBP and not to result from unusual tryptophan fluorescence. The anisotropy of the C-terminal tyrosines is very high in monomeric, octameric, and DNA-complexed TBP and comparable to that observed in much larger proteins. The tyrosines have low accessibility to an external fluorescence quencher. The anisotropy of the single tryptophan located within the N-terminal domain of TBP is much lower than that of the tyrosines and is accessible to an external fluorescence quencher. Tyrosine, but not tryptophan, fluorescence is quenched upon TBP-DNA complex formation. Only the tryptophan fluorescence is shifted to longer wavelengths in the protein-DNA complex. In addition, the accessibility of the tryptophan residue to the external quencher and the internal motion of the tryptophan residue increase upon DNA binding by T13P. These results show the following: (i) The structure of the C-terminal domain structure is unchanged upon TBP oligomerization, in contrast to the N-terminal domain [Daugherty, M. A., Brenowitz, M., and Fried, M. G. (2000) Biochemistry 39, 4869-4880]. (ii) The environment of the tyrosine residues within the C-terminal domain of TBP is structurally rigid and unaffected by oligomerization or DNA binding. (iii) The C-terminal domain of TBP is uniformly in close proximity to bound DNA. (iv) While the N-terminal domain unfolds upon DNA binding by TBP, its increased correlation time shows that the overall structure of the protein is more rigid when complexed to DNA. A model that reconciles these results is proposed MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0006-2960 UR - ISI:000177111600032 L2 - RESOLUTION REFINED STRUCTURE; CRYSTAL-STRUCTURE; TERMINAL DOMAIN; MINOR-GROOVE; BOX COMPLEX; DNA; DYNAMICS; ELEMENT; TRANSCRIPTION; DISSOCIATION SO - Biochemistry 2002 ;41(30):9559-9571 5818 UI - 9996 AU - Khripun MK AU - Chervonenko KY AU - Kiselev AA AU - Petranovskii VP AD - St Petersburg State Univ, St Petersburg, RussiaNatl Autonomous Univ Mexico, Res Ctr Condensed Matter, Ensenada, Baja California, MexicoKhripun, MK, St Petersburg State Univ, St Petersburg, Russia TI - Features of component interaction in concentrated solutions of multicomponent systems AB - Classical complex formation processes in the multicomponent systems Cd(NO3)(2)-MCl-H2O. (M = Li, Cs) occur at pre-eutectic concentrations of salts. At posteutectic concentrations of salts the formation of cadmium chloride complexes is of structurally enforced nature and depends on the type of the cybotactic. group dominating in the solution. The example of the system Cd(NO3)2-LiCl-H2O was used to show that the law of mass action does not apply to systems in which structurally enforced processes occur. Differences in the solubility of MCl (M = Li, Cs, Na) in concentrated solutions of cadmium nitrate are proposed to explain in, terms of differences in interactions of cybotactic groups formed by cadmium nitrate and the corresponding chloride MH - Mexico|Baja California MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1070-3632 UR - ISI:000178691900009 SO - Russian Journal of General Chemistry 2002 ;72(6):870-875 5819 UI - 9532 AU - Kiel S AU - Bandel K AU - Perrilliat MD AD - Univ Hamburg, Inst Geol Palaontol, D-20146 Hamburg, GermanyUniv Hamburg, Geol Palaontol Museum, D-20146 Hamburg, GermanyUniv Nacl Autonoma Mexico, Inst Geol, Delegac Coyoacan, Mexico City 04510, DF, MexicoKiel, S, Univ Hamburg, Inst Geol Palaontol, Bundesstr 55, D-20146 Hamburg, Germany TI - New gastropods from the Maastrichtian of the Mexcala formation in Guerrero, southern Mexico, part II: Archaeogastropoda, Neritimorpha and Heterostropha AB - Seventeen gastropod species including six new ones, belonging to the Archaeogastropoda, Neritimorpha and Heterostropha, are described from the lower Maastrichtian of the Mexcala Formation in Mexico. Most of the species appear to have their closest relatives on the North American Gulf Coast and the Atlantic and Tethyan shores of Europe, a few are cosmopolitans. The new species are: Homalopoma chica, Pileolus cozatli, Mathilda mexicana, Mathilda gardnerae, Heliacus aleneasterae and Ringicula coronai MH - Germany MH - Mexico|Distrito Federal PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 6 U4 - Paleontology U5 - J;Article AV - English IS - 0077-7749 UR - ISI:000179941900002 SO - Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 2002 ;226(3):319-342 5820 UI - 9970 AU - Kim YM AU - Figueroa ME AU - Martin A AU - Silva R AU - Acosta SF AU - Hurtado M AU - Richardson P AU - Kols A AD - Johns Hopkins Univ, Sch Publ Hlth, Ctr Commun Programs, Baltimore, MD 21202, USACtr Human Serv, Qual Assurance Project, Bethesda, MD, USAFronteras Populat Council, Reg Off, Mexico City, DF, MexicoInst Mexicano Seguro Social, Programa Solidaridad IMSS S, Mexico City, DF, MexicoUniv Veracruzana, Jalapa, Veracruz, MexicoKim, YM, Johns Hopkins Univ, Sch Publ Hlth, Ctr Commun Programs, 111 Market Pl,Suite 310, Baltimore, MD 21202 USA TI - Impact of supervision and self-assessment on doctor-patient communication in rural Mexico AB - Objective. To determine whether supervision and self-assessment activities can improve doctor-patient communication Setting and participants. Six supervisors, 60 doctors in their last year of training, and 232 primary health care patients at rural health clinics in Michoacan, Mexico. Design. The main evaluation compared post-intervention measures in control and intervention groups. A small panel study also examined changes from baseline to post-intervention rounds in both groups. Intervention. Over a 4-month period, specially trained supervisors added 1 hour of supervision on interpersonal communication and counseling (IPC/C) to regular site visits. Doctors, who had received prior IPC/C training, periodically audiotaped and assessed their own consultations. Main outcome measures. These comprised frequency of doctors' facilitative communication, doctors' biomedical information-giving, and patients' active communication. Results. The performance of all doctors improved markedly over the study period, but gains in facilitative communication and in formation-giving were significantly greater in the intervention than the control group. No single component of the intervention was responsible for the improvement; it resulted from the combination of activities. The doctors appreciated the more supportive relationship with supervisors that resulted from the intervention and found listening to themselves on audiotape a powerful, although initially stressful, experience. Conclusion. Supportive supervision and self-assessment activities can reinforce IPC/C training, prompt reflection and learning, and help novice doctors improve their interpersonal communication skills MH - USA MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Article AV - English IS - 1353-4505 UR - ISI:000178777200003 L2 - communication;quality of care;physician-patient relations;self-assessment;supervision;HEALTH-CARE PROVIDERS; INTERPERSONAL-COMMUNICATION; CLINICAL SUPERVISION SO - International Journal for Quality in Health Care 2002 ;14(5):359-367 5821 UI - 11417 AU - Kipshidze G AU - Kuryatkov V AU - Borisov B AU - Kudryavtsev Y AU - Asomoza R AU - Nikishin S AU - Temkin H AD - Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409, USATexas Tech Univ, NanoTech Ctr, Lubbock, TX 79409, USACINVESTAV, Dept Elect Engn, SEES, SIMS Lab, Mexico City 07300, DF, MexicoNikishin, S, Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409 USA TI - Mg and O codoping in p-type GaN and AlxGa1-xN (0 < x < 0.08) AB - We describe Mg and O codoping experiments in gas-source molecular-beam epitaxy of GaN and AlGaN that produce high levels of Mg incorporation and activation. In order to obtain the highest level of Mg incorporation the surface stoichiometry was optimized by adjusting the NH3/Ga and NH3/(Ga+Al) flux ratios. The lowest acceptor activation energy and the highest hole concentration, p=2x10(18) cm(-3), were measured in samples of p-GaN and p-AlxGa1-xN with well-defined Mg/O ratios determined by secondary ion mass spectrometry. Measurements of the temperature dependence of diffusion current in p-n junctions formed in Al0.08Ga0.92N and GaN show acceptor activation energy of 195+/-10 and 145+/-15 meV, respectively. Low activation energies are attributed to successful codoping. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000175068900031 L2 - MOLECULAR-BEAM EPITAXY; DOPED GAN SO - Applied Physics Letters 2002 ;80(16):2910-2912 5822 UI - 10427 AU - Kir'yanov AV AU - Aboites V AU - Belovolov AM AU - Timoshechkin MI AU - Belovolov MI AU - Damzen MJ AU - Minassian A AD - AC, Ctr Invest & Opt, Leon 37150, Gto, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, EnglandKir'yanov, AV, AC, Ctr Invest & Opt, Apartado Postal 948, Leon 37150, Gto, Mexico TI - Powerful visible (530-770 nm) luminescence in Yb,Ho : GGG with IR diode pumping AB - Powerful visible luminescence in a Gadolinium Gallium Garnet (GGG) crystal, co-activated with Yb3+ (similar to15 at.%) and Ho3+ (similar to0.1 at.%) ions, is investigated under CW laser diode pumping (lambda = 938 and 976 nm). The main visible emission band is observed in the green with its peak at (lambda similar to540 nm) and measured to be about 10% with respect to Yb3+ IR luminescence (lambda similar to1000 nm). Red (lambda similar to650 nm) and near-IR (lambda similar to755 nm) emission bands are also observed but are weaker (about 3-5%). Analysis of the crystal absorption and luminescence spectra allows one to conclude that Yb3+ Ho3+ stepwise up-conversion is the mechanism explaining the phenomenon. Ho3+ ions embedded in the crystal in small concentration are shown to form an effective reservoir for energy transferred from the excited Yb3+ subsystem and to be an efficient source of the visible emission. (C) 2002 Optical Society of America MH - United Kingdom MH - Mexico|Guanajuato MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 19 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000177417300010 L2 - RED EMISSION; MU-M; CONVERSION; LASER; GREEN SO - Optics Express 2002 ;10(16):832-839 5823 UI - 11389 AU - Kir'yanov AV AU - Filippov VN AU - Lukashev AV AD - Ctr Invest Opt AC, Leon 37150, GTO, MexicoPARADIGM Med Corp, Laser Div, San Diego, CA, USAKir'yanov, AV, Ctr Invest Opt AC, Apartado Postal 948, Leon 37150, GTO, Mexico TI - Modeling of all-solid-state erbium fiber laser passively Q-switched with Co2+: ZnSe crystal AB - Numerical modeling of a cw-pumped all-solid-state fiber erbium laser passively Q-switched with a Co2+:ZnSe crystal is proceeded. Features of the laser dynamics are investigated from a super-luminescence regime via passive Q-switching mode to cw operation. The basical parameters of the passive Q-switching mode-average power, pulse repetition rate, duration, and energy-are calculated numerically depending on the laser pump power. Results of the modeling for a long-cavity moderately doped erbium fiber laser are shown to be in a quite-well agreement with its experimental realization. The advanced configuration representing a short-cavity highly-doped large-mode-aperture fiber laser is simulated as well giving the more output efficiency and shorter giant pulse width MH - Mexico|Guanajuato MH - USA PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000175065500016 L2 - ABSORBER Q-SWITCHES; SATURABLE-ABSORBER SO - Laser Physics 2002 ;12(4):684-690 5824 UI - 9915 AU - Klimov AB AU - Sanchez-Soto LL AU - Navarro A AU - Yustas EC AD - Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoSanchez-Soto, LL, Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, Spain TI - Effective Hamiltonians in quantum optics: a systematic approach AB - A general and systematic method for obtaining effective Hamiltonians that describe different nonlinear optical processes is discussed. The method exploits the existence of a nonlinear deformation of the usual su( 2) algebra that arises as the dynamical symmetry of the original model. When some physical parameter, dictated by the process under consideration, becomes small, a diagonal effective Hamiltonian is obtained immediately, that correctly represents the dynamics for arbitrary states and long times. The technique is extended to su(3) and su(N), finding the corresponding effective Hamiltonians when some resonance conditions are fulfilled MH - Mexico|Jalisco MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 13 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000178885600013 L2 - DICKE-MODEL; RESONANCE; DYNAMICS; STATES; REPRESENTATION; ALGEBRA; FIELDS; ECHOES; CAVITY; ATOM SO - Journal of Modern Optics 2002 ;49(13):2211-2226 5825 UI - 10435 AU - Klimov AB AU - Man'ko OV AU - Man'ko VI AU - Smirnov YF AU - Tolstoy VN AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoPN Lebedev Phys Inst, Moscow 119991, RussiaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, Moscow 119899, RussiaKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Tomographic representation of spin and quark states AB - We present a short review of the general principles of constructing tomograms of quantum states. We derive a general tomographic reconstruction formula for the quantum density operator of a system with a dynamical Lie group. In the reconstruction formula, the multiplicity of irreducible representation in Clebsch-Gordan decomposition is taken into account. Various approaches to spin tomography are discussed. An integral representation for the tomographic probability is found and a contraction of the spin tomogram to the photon-number tomography distribution is considered. The case of SU (3) tomography is discussed with the examples of quark states (related to the simplest triplet representations) and octet states MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Russia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 31 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000177512500016 L2 - PROBABILITY-DISTRIBUTIONS; DENSITY-MATRIX; SYMPLECTIC TOMOGRAPHY; QUANTUM-MECHANICS; WIGNER FUNCTION; RECONSTRUCTION; SYSTEMS; QUADRATURES; VACUUM; PHASE SO - Journal of Physics A-Mathematical and General 2002 ;35(29):6101-6123 5826 UI - 10325 AU - Klimov VA AU - Timofeeva IO AU - Khanin SD AU - Shadrin EB AU - Ilinskii AV AU - Silva-Andrade F AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaGertsen State Pedag Univ, St Petersburg 191186, RussiaUniv Autonoma Puebla, Puebla 72570, MexicoKlimov, VA, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - Hysteresis loop construction for the metal-semiconductor phase transition in vanadium dioxide films AB - Thermal hysteresis of the reflectivity of vanadium dioxide films observed upon the metal-semiconductor phase transition is studied. The major hysteresis loop is assumed to form when the phase equilibrium temperature in film grains and the grain size vary and correlate with each other. Within the suggested concept of hysteresis loop formation, it is demonstrated that the major loop may be asymmetric, i.e., broadened (shifted) toward lower temperatures. Unlike hysteresis branches for VO2 bulk single crystal, those for VO2 films are extended along the temperature axis and may exhibit a step if the grain size distribution has several maxima. The validity of the concept is verified experimentally. It is also shown that atomic force microscopy (AFM) data for the grain size distribution can serve to determine the distribution parameters from the phase equilibrium temperatures without constructing a complete set of minor hysteresis loops, as was required before. (C) 2002 MAIK "Nauka / Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 13 U4 - Physics, Applied U5 - J;Article AV - English IS - 1063-7842 UR - ISI:000177866000010 SO - Technical Physics 2002 ;47(9):1134-1139 5827 UI - 9657 AU - Klimova T AU - Solis D AU - Ramirez J AU - Lopez-Agudo A AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, UNICAT, Mexico City 04510, DF, Mexico. CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain TI - NiMo/HNaY(x)-Al2O3 catalysts for hydrodesulfurization of hindered dibenzothiophenes: effect of the preparation method AB - Three NiMo-HNaY-alumina catalysts with similar composition were prepared by different methods and tested in the hydrodesulfurization of dibenzothiophene (DBT) and 4,6-dimethyl-DBT. It was found that the catalyst preparation method induces some changes of the characteristics of the deposited metallic species as well as of the acidic properties of the zeolite component. These changes affect the catalytic behavior in the hydrodesulfurization of DBT and 4,6-DMDBT. Acidic properties of the catalyst seem to be more important for the conversion of alkyl-substituted DBT MH - Mexico|Distrito Federal MH - Spain T3 - SCIENTIFIC BASES FOR THE PREPARATION OF HETEROGENEOUS CATALYSTSStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticle6SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALBV62A AV - English IS - 0167-2991 UR - ISI:000179552800029 SO - 2002 ;():267-275 5828 UI - 11725 AU - Klippert R AU - Rosu HC AD - Univ Guanajuato, Inst Fis, Leon, Gto, MexicoInt Ctr Relat Astrophys, Pescara, ItalyBrazilian Ctr Res Phys, Rio De Janeiro, BrazilRosu, HC, Univ Guanajuato, Inst Fis, Apdo Postal E-143, Leon, Gto, Mexico TI - Strictly isospectral potentials from excited quantum states AB - The strictly nonrelativistic isospectral scheme based on the general Riccati solution and Darboux transformation function corresponding to excited states is presented on the following examples: the harmonic oscillator, the square well, and the hydrogen atom MH - Brazil MH - Italy MH - Mexico|Guanajuato PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000174055600010 L2 - SUPERSYMMETRY SO - International Journal of Theoretical Physics 2002 ;41(2):331-340 5829 UI - 10861 AU - Klocke R AU - Gomez-Lechon MJ AU - Ehrhardt A AU - Mendoza-Figueroa T AU - Donato MT AU - Lopez-Revilla R AU - Castell JV AU - Paul D AD - Fraunhofer Inst Toxicol & Aerosol Res, Dept Cell Biol, Hannover, GermanyHosp Univ La Fe, Ctr Invest, Unidad Hepatol Expt, Valencia, SpainCINVESTAV, IPN, Dept Pharmacol & Toxicol, Mexico City 14000, DF, MexicoCINVESTAV, IPN, Dept Cell Biol, Mexico City 14000, DF, MexicoIPICYT, Dept Biol Mol, San Luis Potosi, SLP, MexicoKlocke, R, Ingenium Pharmaceut AG, Fraunhofer Str 13, D-82152 Martinsried, Germany TI - Establishment and characterization of immortal hepatocytes derived from various transgenic mouse lines AB - The potential of three genetic changes introduced into mice by the transgenic or knockout technology aimed at immortalizing hepatocytes in vitro and concomitantly preserving their differentiated hepatic functions was analyzed. Six hepatocyte lines were isolated from neonatal and adult transgenic mice expressing either IgEGF (a secretable variant of hEGF) or SV40 T antigen in the liver and from neonatal and adult p53 knockout (KO) mice and have been subcultured >150 times in serum-free, arginine-deficient medium. Only in SV40 T antigen transgenic lines profiles of mRNAs encoding serum proteins, transcription factors, and liver-specific enzymes were similar to those found in livers and primary hepatocytes. Accordingly, these cells displayed basal and inducible expression of CYP proteins as well as testosterone metabolizing activities. Thus, either knockout of the p53 gene or expression of SV40 T antigen or of IgEGF imparts immortality to hepatocytes in vitro, but only SV40 T antigen expression is compatible with the concomitant long-term preservation of differentiated liver functions. (C) 2002 Elsevier Science (USA). All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000176490100019 L2 - mouse hepatocytes;immortalization;differentiation;epidermal growth factor;p53 knockout;SV40 T antigen;FETAL-RAT HEPATOCYTES; SV40 T-ANTIGEN; DIFFERENTIATED FUNCTIONS; PRIMARY CULTURE; POLYOMA-VIRUS; LIVER; MICE; EXPRESSION; TRANSFORMATION; GROWTH SO - Biochemical and Biophysical Research Communications 2002 ;294(4):864-871 5830 UI - 10336 AU - Kluzniak W AU - Lee WH AD - Copernicus Astron Ctr, PL-00716 Warsaw, PolandZielona Gora Univ, Inst Astron, PL-65265 Zielona Gora, PolandUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoKluzniak, W, Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland TI - The swallowing of a quark star by a black hole AB - In three-dimensional smooth particle hydrodynamic simulations of the coalescence of a quark star with a pseudo-Newtonian black hole all of the quark matter is quickly accreted by the black hole. The Madsen-Caldwell-Friedman argument against the existence of quark stars may need to be re-examined MH - Mexico|Distrito Federal MH - Poland PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000177790700006 L2 - dense matter;gravitational waves;hydrodynamics;binaries : close;stars : general;gamma-rays : bursts;TIDALLY LOCKED BINARIES; GAMMA-RAY BURSTS; STRANGE STARS; NEUTRON-STARS; NEWTONIAN HYDRODYNAMICS; STIFF EQUATION; COALESCENCE; FREQUENCY; REPEATERS; LIMITS SO - Monthly Notices of the Royal Astronomical Society 2002 ;335(1):L29-L32 5831 UI - 10678 AU - Knjazhanski SY AU - Cadenas G AU - Garcia M AU - Perez CM AU - Nifant'ev IE AU - Kashulin IA AU - Ivchenko PV AU - Lyssenko KA AD - CIQA, Saltillo 25100, Coahuila, MexicoMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaRussian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 117813, RussiaKnjazhanski, SY, CIQA, Saltillo 25100, Coahuila, Mexico TI - (Fluorenyl)titanium triisopropoxide and bis(fluorenyl)titanium diisopropoxide: A facile synthesis, molecular structure, and catalytic activity in styrene polymerization AB - [(eta(1)-Flu)Ti(mu-(OPr)-Pr-i)((OPr)-Pr-i)(2)](2) (1) and (eta(1)-Flu)(eta(5)-Flu)Ti((OPr)-Pr-i)(2) (2) were easily prepared from FluLi and ClTi((PrO)-Pr-i)(3) and demonstrated a remarkable thermal stability in comparison with known (fluorenyl)titanium complexes. Both complexes were characterized by X-ray analysis and temperature-dependent NMR spectroscopy. In combination with methylaluminoxane, both compounds are highly efficient initiators for styrene polymerization, producing highly syndiotactic polymers MH - Mexico|Coahuila MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000176869300008 L2 - FREE TITANIUM CATALYSTS; SYNDIOSPECIFIC POLYMERIZATION; OLEFIN POLYMERIZATION; FLUORENYL COMPLEXES; CRYSTAL-STRUCTURE; ZIRCONIUM; HAFNIUM; MECHANISM SO - Organometallics 2002 ;21(15):3094-3099 5832 UI - 11530 AU - Knowles ID AU - Centurion D AU - Villalon CM AU - Ramage AG AD - Univ Coll London, Dept Pharmacol, London NW3 2PF, EnglandIPN, CINVESTAV, Mexico City 14330, DF, Mexico TI - Evidence that central AT(2) as well as AT(1) receptors play a role in the cardiovascular effects evoked by activation of central 5-HT2A receptors with quipazine in anaesthetized rats MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0007-1188 UR - ISI:000174541900145 SO - British Journal of Pharmacology 2002 ;135(): 5833 UI - 11501 AU - Koch V AU - Wolff M AD - Ctr Coastal Studies, Puerto San Carlos, Baja California, MexicoCtr Trop Marine Ecol, D-28359 Bremen, GermanyKoch, V, Ctr Coastal Studies, Ap Postal 15, Puerto San Carlos, Baja California, Mexico TI - Energy budget and ecological role of mangrove epibenthos in the Caete estuary, North Brazil AB - Epibenthic community structure, somatic production and energy flow were studied in the Caete mangrove estuary in North Brazil on for 3 representative strata: high intertidal forest (F), small creeks in the forest (SC) and open mudbanks of large intertidal creeks (LC). Seven decapod crustaceans and I gastropod accounted for > 95 % of total epifaunal biomass, with highest values in the forest followed by large and small creeks (228.2, 103.6 and 69.7 kJ m(-2) respectively). The leaf-consuming crab Ucides cordatus was clearly dominant in the forest, followed by the fiddler crabs Uca rapax and U. vocator. The large creek stratum was strongly dominated by the fiddler crab U. maracoani, while in the small creek 4 species (Uca cumulanta, U. maracoani, Pachygrapsus gracilis and Eurytium limosum) contributed similar quantities to total biomass. Per area somatic production (P) and respiration (R) was highest in the large creek, followed by the forest and small creek stratum. Based on the contribution of each stratum, total biomass (332.8 kJ m(-2)), production (455.8 kJ m(-2) yr(-1)) and assimilation (2959.6 kJ m(-2) yr-1) were estimated for the whole area. While the herbivorous feeding guild with U. cordatus was the most prominent in terms of biomass (75 % of the total), the detritivorous fiddler crabs and P. gracilis clearly dominated in terms of respiration and somatic production (60 and 90 % respectively). Carnivores (Eurytium limosum and Thais coronata) contributed < 2 % to the epibenthic energy budget. A system picture emerges whereby energy flow is strongly dominated by herbivorous and detritivorous species, Both guilds probably promote mangrove primary production by (1) conserving nutrients in the system, (2) enhancing nutrient remineralization, and (3) oxygenizing the soil through their burrowing and feeding activities. A resulting positive feedback loop between mangroves, crabs and bacteria could explain the very high mangrove productivity and the high efficiency with which mangrove primary production is assimilated by the crabs (almost 15 %) MH - Germany MH - Mexico|Baja California PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 12 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000174655000011 L2 - mangrove benthos;energy flow;production;assimilation;energy budget;fiddler crabs;Uca;Ucides;TROPHIC FLOW MODEL; FIDDLER CRABS; SECONDARY PRODUCTION; GENUS UCA; SALT-MARSH; MUD-FLAT; COMMUNITY; OCYPODIDAE; CRUSTACEA; HABITATS SO - Marine Ecology-Progress Series 2002 ;228():119-130 5834 UI - 9637 AU - Koenigsberger G AU - Kurucz RL AU - Georgiev L AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoKoenigsberger, G, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, Mexico TI - The photospheric absorption lines in the ultraviolet spectrum of the multiple system HD 5980 AB - We search for radial velocity variations in the ultraviolet spectra of the erupting Wolf-Rayet/luminous blue variable system HD 5980, located in the Small Magellanic Cloud. We obtain an average radial velocity of 22 +/- 22 km s(-1) for five observations in 1999 at different orbital phases, -39 +/- 24 km s(-1) for one observation in 2001, and 20 +/- 45 km s(-1) for one observation in 2002. These velocities are with respect to the SMC O3 star MPG 355, which is used as one of the templates. Hence, radial velocity variations on the 19.265 day (star A+ star B) orbital timescale attributable to the erupting star ( star A) of the system are not detected, thus confirming that the visible absorption lines in the spectrum have their origin in a third stellar component ( star C). We propose that star A has very broad (v sin i similar to 250 km s(-1)) absorption lines, which would escape detection in the complicated emission-line spectrum of the system. Such broad lines, combined with the 128 km s(-1) orbital motion, would lead to a lower amplitude fictitious radial velocity curve when the stationary set of absorption lines is measured. We conclude that line pro le variations at orbital phase 0.0 from one epoch of observations to another are associated with these broad underlying absorption lines, arising in the unstable photosphere of star A. The analysis is performed with the aid of synthetic UV spectra that are calculated from LTE line-blanketed atmosphere models, and the HST Space Telescope Imaging Spectrograph spectra of four O-type stars in the cluster NGC 346, to which HD 5980 is believed to belong. We estimate T-eff and obtain values of v sin i and the mean radial velocity for MPG 324 [O4 V((f))], MPG 368 [O4-5 V((f))], MPG 355 [O3 V(f*)], and MPG 113 (OC 6Vz) MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179681500045 L2 - binaries : spectroscopic;Magellanic Clouds;stars : atmospheres;stars : individual (HD 5980);SMALL-MAGELLANIC-CLOUD; WOLF-RAYET STARS; BINARY HD-5980; O-STARS; OPTICAL-SPECTRUM; SMC; MICROTURBULENCE; SPECTROSCOPY; ATMOSPHERES; SUPERGIANTS SO - Astrophysical Journal 2002 ;581(1):598-609 5835 UI - 11058 AU - Kolata JJ AU - Goldberg VZ AU - Lamm LO AU - Marino MG AU - O'Keeffe CJ AU - Rogachev G AU - Aguilera EF AU - Garcia-Martinez H AU - Martinez-Quiroz E AU - Rosales P AU - Becchetti FD AU - O'Donnell TW AU - Roberts DA AU - Brown JA AU - DeYoung PA AU - Hinnefeld JD AU - Shaheen SA AD - Univ Notre Dame, Dept Phys, Notre Dame, IN 46556, USAInst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Michigan, Dept Phys, Ann Arbor, MI 48109, USAMillikin Univ, Dept Phys & Astron, Decatur, IL 62522, USAIndiana Univ S Bend, Dept Phys, South Bend, IN 46634, USAKing Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah, Saudi ArabiaKurchatov Inst, Moscow, RussiaKolata, JJ, Univ Notre Dame, Dept Phys, Notre Dame, IN 46556, USA TI - Elastic scattering and transfer in the Li-8+Pb-208 system near the Coulomb barrier AB - The interaction of Li-8 with Pb-208 has been studied over a range of energies near the nominal Coulomb barrier. An excitation function for the total reaction cross section is obtained from elastic-scattering angular distributions and compared with existing data for Li-6,Li-7 scattering. The result of this comparison indicates that the interaction barrier for Li-8+Pb-208 is reduced by approximately 4 MeV relative to that of Li-7. The yields of Li-7 and He-4 from breakup and/or transfer processes are determined, and compared with similar data for other light, weakly bound projectiles MH - Mexico|Distrito Federal MH - Russia MH - Saudi Arabia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000175772600057 L2 - NUCLEAR-REACTIONS; REACTION CHANNELS; BREAKUP; FUSION; LI-8 SO - Physical Review C 2002 ;65(5): 5836 UI - 9953 AU - Kolmanovskii V AU - Shaikhet L AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoDonetsk State Acad Management, Dept Math Informat & Comp, UA-83015 Donetsk, UkraineKolmanovskii, V, IPN, CINVESTAV, Dept Automat Control, Av Ipn 2508,Ap 14-740,Col SP Zacatenco, Mexico City 07360, DF, Mexico TI - Construction of Lyapunov functionals for stochastic hereditary systems: A survey of some recent results AB - It is well known that many processes in automatic regulation, physics, mechanics, biology, economy, ecology, etc., can be modelled by hereditary systems. Many stability results in the theory of hereditary systems and their applications were obtained by construction of appropriate Lyapunov functionals (see, for instance, [1-4]). The construction of every such functional was a long time an art of its author. In this paper, formal procedure for construction of Lyapunov functionals for stochastic difference and differential equations and some results on asymptotic mean square stability conditions are considered. More details on these results are presented in [5-52]. The bibliography does not contain works of other researchers since this paper is a short survey of the authors' works. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000178852700006 L2 - stochastic systems;delay;stability;Lyapunov functionals;method of construction;DIFFERENCE-EQUATIONS; VOLTERRA-EQUATIONS; STABILITY SO - Mathematical and Computer Modelling 2002 ;36(6):691-716 5837 UI - 9916 AU - Kolmanovskii VB AU - Richard JP AD - Ecole Cent Lille, CNRS, LAIL, UPRESA 8021, Villeneuve Dascq, FranceIPN, CINVESTAV, Mexico City 07738, DF, MexicoMoscow Univ Elect & Math, Russian Acad Sci, Space Res Inst, IKI, Moscow 109172, RussiaRichard, JP, Ecole Cent Lille, CNRS, LAIL, UPRESA 8021, BP 48, Villeneuve Dascq, France TI - Estimation of the solutions of Volterra difference equations MH - France MH - Mexico|Distrito Federal MH - Russia PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000178940400024 SO - Journal of Mathematical Analysis and Applications 2002 ;273(2):618-626 5838 UI - 11269 AU - Konyaev KV AU - Filonov AE AD - Russian Acad Sci, NN Andreev Acoust Inst, Moscow 117036, RussiaUniv Guadalajara, Guadalajara 44421, Jalisco, MexicoKonyaev, KV, Russian Acad Sci, NN Andreev Acoust Inst, Ul Shvernika 4, Moscow 117036, Russia TI - Internal tide along the Pacific coast of Mexico AB - The features of the generation and structure of an internal tide along the Pacific coast of Mexico are discussed using the data of a temperature-salinity field survey and temperature data obtained by an anchored instrument. The shelf in the experimental area is not clearly defined, and a steep continental slope starts nearly from the seacoast; this leads to unusual conditions for internal-tide generation. Upper-layer oceanic measurements reveal relatively short (oblique and semidiurnal) tidal waves and soliton groups propagating from the coast, The semidiurnal tidal ray patterns constructed with respect to the sea-bottom profile and buoyancy frequency data show that all internal-tide rays are directed from every segment of the slope with a critical oceanward tilt of the bottom. Possibly, this is why relatively short and intense internal tidal waves that are subjected to a nonlinear dispersion transformation with soliton formation appear over the continental slope MH - Mexico|Jalisco MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 2 U4 - Meteorology & Atmospheric Sciences;Oceanography U5 - J;Article AV - English IS - 0001-4338 UR - ISI:000175319800013 L2 - GENERATION; WAVES SO - Izvestiya Atmospheric and Oceanic Physics 2002 ;38(2):228-234 5839 UI - 10199 AU - Kopani M AU - Mikula M AU - Jergel M AU - Falcony C AU - Ortega L AU - Pincik E AD - Slovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaComenius Univ, Inst Pathol, Fac Med, Bratislava 81108, SlovakiaDept Graph Arts Tech & Appl Photochem, Fac Chem Technol, Bratislava 81237, SlovakiaIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoCNRS, Cristallog Lab, F-38042 Grenoble 09, FrancePincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84228, Slovakia TI - About an influence of Ar ion beam of very low energy on a-Si : H properties AB - The aim of this paper is to present results of experimental research and find out correlation between structural and optical properties of a-Si:H layers exposed to an influence of ion beam of very low energy. We have characterized the virgin and bombarded layers of a-Si:H by the following techniques: infrared spectroscopy (IR), X-ray diffraction at grazing incidence (XRDGI) and scanning electron microscopy. The XRDGI and IR measurements indicate that amorphous layer contains multiatomic Si-H complexes (as e.g. Si80H20) which are gradually decomposed due to atom/ion impact to the layers. We suppose this is the reason why the amplitude of similar to2000 cm(-1) IR maximum considerably increased after the bombardment. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Slovakia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000178111100020 L2 - a-Sr : H layers;ion beam modification;infrared spectroscopy;X-ray diffraction;AMORPHOUS-SILICON; SPECTRA; FILMS SO - Vacuum 2002 ;67(1):149-153 5840 UI - 11472 AU - Kordas K AU - Patricia L AU - Rosado JL AU - Stoltzfus RJ AD - Johns Hopkins Univ, Baltimore, MD 21205, USAInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoUniv Autonoma Queretaro, Queretaro, Mexico TI - Lead exposure and nutritional status of first-grade children in Mexico MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533601538 SO - Faseb Journal 2002 ;16(4):A278-A278 5841 UI - 10057 AU - Koriyama C AU - Akiba S AU - Itoh T AU - Kijima Y AU - Sueyoshi K AU - Corvalan A AU - Herrera-Goepfert R AU - Eizuru Y AD - Kagoshima Univ, Fac Med, Dept Publ Hlth, Kagoshima 8908520, JapanKagoshima Inst Prevent Med, Dept Pathol, Kagoshima, JapanKagoshima Univ, Fac Med, Dept Surg 1, Kagoshima 8908520, JapanKagoshima City Hosp, Dept Pathol, Kagoshima, JapanHosp San Borja Arriaran, Inst Chileno Japones Enfermedades Digest, Santiago, ChileInst Nacl Cancerol, Dept Pathol, Mexico City 14000, DF, MexicoKagoshima Univ, Fac Med, Ctr Chron Viral Dis, Div Oncogen & Persistent Viruses, Kagoshima 8908520, JapanAkiba, S, Kagoshima Univ, Fac Med, Dept Publ Hlth, 8-35-1 Sakuragaoka, Kagoshima 8908520, Japan TI - Prognostic significance of Epstein-Barr virus involvement in gastric carcinoma in Japan AB - We examined the prognosis of 64 EBV-associated gastric carcinoma (EBV-GC) cases and 128 EBV-negative gastric carcinoma cases. EBV-GCs were identified by detecting EBV-encoded small RNA (EBER) using in situ hybridization assay of paraffin-embedded tissue. For each EBV-GC case, 2 EBER-negative cases (EBV-negative, cases) were selected, matching the EBV-GC case with respect to ago, sex, tumor location, and depth of invasion. The average follow-up period was 70.9 months (SD=61.1) in EBV-GCs and 63.8 months (SD=59.7) in EBV-negative cases. Tumor-advanced stage determined by TNM classification of UICC, tumor location, and p53 over-expression were statistically significant prognostic factors. On the other hand, EBER expression was not related to the survival of patients. However, further analysis specific for intestinal and diffuse types of Lauren classification revealed that the association of EBER expression with prognosis was different in the two histological types. EBER expression was related to poor prognosis in intestinal-type carcinoma [hazard ratio (HR) = 2.5, 95% confidence intervals (CI) = 1.3-4,8] after adjusting for stage, p53 overexpression, and tumor location, whereas the diffuse-type EBV-GC had better prognosis (HR = 0.4, 95% CI = 0.2-0.9) even when lymphoepithelioma-like carcinomas were excluded. To examine the interactive prognostic effects between EBER expression and p53 over-expression, the study subjects were divided into 4 groups on the basis of EBER expression and p53 over-expression. In intestinal-type tumors, the cases having both EBER expression and p53 over-expression showed the poorest prognosis (HR = 10.0, 9511 CI = 3.3-30.4), and the cases with either EBER expression or p53 over-expression had an intermediate prognosis. In diffuse-type tumor, only EBER was an important prognostic factor. These results give additional evidence implicating EBV in the natural history of EBV-GCs MH - Chile MH - Japan MH - Mexico|Distrito Federal PB - ATHENS: PROFESSOR D A SPANDIDOS RP - NOT IN FILE U3 - TC 7 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 1107-3756 UR - ISI:000178628200021 L2 - Epstein-Barr virus;gastric carcinoma;p53;survival;LYMPHOEPITHELIOMA-LIKE CARCINOMA; P53 OVEREXPRESSION; HODGKINS-DISEASE; EXPRESSION; PROTEIN; CANCER; ASSOCIATION; INFECTION; ADENOCARCINOMA; ACCUMULATION SO - International Journal of Molecular Medicine 2002 ;10(5):635-639 5842 UI - 10689 AU - Korneev N AU - Ramirez OF AU - Bertram RP AU - Benter N AU - Soergel E AU - Buse K AU - Hagen R AU - Kostromine SG AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Bonn, Inst Phys, D-53115 Bonn, GermanyBayer AG, Dept Cent Res, D-51368 Leverkusen, GermanyKorneev, N, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Pyroelectric properties of electrically poled photoaddressable polymers AB - In this article, we present pyroelectric investigations of electrically poled side-chain polymers containing mesogenic disazobenzene chromophores using a very simple setup. Heating above the glass temperature (about 104degreesC) usually eliminates the pyroelectric effect of the sample. However, in samples with an indium tin oxide/aluminum electrode design, a self-poling effect is observed. The pyroelectric coefficients of electrically poled samples reach values of up to 0.2 muC/(m(2)K). From this, we conclude that the strongly anisometric side chains can be reoriented, and that their degree of alignment is about 3%. (C) 2002 American Institute of Physics MH - Germany MH - Mexico|Puebla PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000176907700053 L2 - 2ND-HARMONIC GENERATION; DATA-STORAGE; PERFORMANCE; ELECTRETS; FILMS SO - Journal of Applied Physics 2002 ;92(3):1500-1503 5843 UI - 11619 AU - Kornev KG AU - Shingareva IK AU - Neimark AV AD - TRI Princeton, Ctr Modeling & Characterizat Nanoporous Mat, Princeton, NJ 08542, USAUniv Sonora, Dept Matemat, Hermosillo 83000, Sonora, MexicoNeimark, AV, TRI Princeton, Ctr Modeling & Characterizat Nanoporous Mat, 601 Prospect Ave, Princeton, NJ 08542 USA TI - Capillary condensation as a morphological transition AB - The process of capillary condensation/ evaporation in cylindrical pores is considered within the idea of symmetry breaking. Capillary condensation/evaporation is treated as a morphological transition between the wetting film configurations of different symmetry. We considered two models: (i) the classical Laplace theory of capillarity and (ii) the Derjaguin model which takes into account the surface forces expressed in terms of the disjoining pressure. Following the idea of Everett and Haynes, the problem of condensation/ evaporation is considered as a transition from bumps/undulations to lenses. Using the method of phase portraits, we discuss the mathematical mechanisms of this transition hidden in the Laplace and Derjaguin equations. Analyzing the energetic barriers of the bump and lens formation, it is shown that the bump formation is a prerogative of capillary condensation: for the vapor-liquid transition in a pore, the bump plays the same role as the spherical nucleus in a bulk fluid. We show also that the Derjaguin model admits a variety of interfacial configurations responsible for film patterning at specific conditions. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0001-8686 UR - ISI:000174331800009 L2 - capillary condensation/evaporation;interfacial configurations;bump formation;film patterning;THIN LIQUID-FILMS; MONTE-CARLO SIMULATIONS; PHASE-SEPARATION; EQUILIBRIUM-CONFIGURATIONS; CONFINED GEOMETRY; CYLINDRICAL PORES; SPINODAL DECOMPOSITION; ADSORPTION HYSTERESIS; MOLECULAR-DYNAMICS; SOLID-SURFACES SO - Advances in Colloid and Interface Science 2002 ;96(1-3):143-167 5844 UI - 10330 AU - Korovin LI AU - Lang IG AU - Contreras-Solorio DA AU - Pavlov ST AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Escuela Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaKorovin, LI, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - Penetration of a symmetric light pulse through a wide quantum well AB - The reflection, transmission, and absorption of a symmetric electromagnetic pulse whose carrier frequency is close to the frequency of the interband transition in a quantum well are calculated. The energy levels in the quantum well are assumed to be discrete, and one excited level is taken into account. Consideration is given to the case of a sufficiently wide quantum well when the pulse wavelength corresponding to the carrier frequency is comparable to the quantum well width and when allowance should be made for the dependence of the matrix element of the interband transition on the photon wave vector. The calculations are performed with due regard for the difference between the refractive indices of the material of the quantum well and the barrier at an arbitrary ratio of the reciprocal radiative to nonradiative lifetimes of the excited level of the electronic system. It is demonstrated that the inclusion of the spatial dispersion and the difference in the refractive indices most strongly affects the reflection of the electromagnetic pulse, because the reflection due to interband transitions in the quantum well is accompanied by an additional reflection from the quantum well boundaries. Compared to the previously considered model, the most radical changes in the reflection are observed in the case when the reciprocal nonradiative lifetime of the excited state is substantially longer than the reciprocal radiative lifetime. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000177865400025 SO - Physics of the Solid State 2002 ;44(9):1759-1768 5845 UI - 10335 AU - Kosevicha YA AU - Corso G AD - Max Planck Inst Phys Complex Syst, D-01187 Dresden, GermanyUniv Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoUniv Fed Rio Grande Norte, Dept Fis Teor & Expt, BR-59072090 Natal, RN, BrazilKosevicha, YA, Max Planck Inst Phys Complex Syst, Noethnitzer Str 38, D-01187 Dresden, Germany TI - Temporal Fourier spectra of stationary and slowly moving breathers in Fermi-Pasta-Ulam anharmonic lattice AB - The temporal Fourier spectra of stationary and slowly moving self-localized large-amplitude modes (breathers) in translationally invariant chain of coupled classical anharmonic oscillators are studied. The breathers arise naturally in the anharmonic lattice from modulational instability of short-wavelength extended vibrational modes. The frequencies of the resonant spectral peaks of the stationary breather are measured numerically and compared with an exact analytical solution for the stationary extended nonlinear sinusoidal wave in the anharmonic lattice, which is conveniently adapted. Symmetrical satellite peaks of the fundamental frequency and its higher odd harmonics in the temporal Fourier spectrum of the stationary breather are observed. Small admixture of the slowly moving breather solution to the stationary one is discussed in connection with these peaks. It is observed that the temporal Fourier spectrum of slowly moving breather consists of two main frequencies symmetrically shifted upwards and downwards with respect to the fundamental frequency of the stationary breather with the same energy, in perfect agreement with the earlier theoretical prediction of one of the authors. The relation between the group velocity of slowly moving breather and the fundamental frequency of the stationary breather with the same energy is derived. (C) 2002 Elsevier Science B.V. All fights reserved MH - Brazil MH - Germany MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000177793300001 L2 - stationary breather;slowly moving breather;group velocity;temporal Fourier spectra;INTRINSIC LOCALIZED MODES; NONLINEAR SCHRODINGER BREATHERS; MODULATIONAL INSTABILITY; ENERGY EQUIPARTITION; VIBRATIONAL-MODES; EXISTENCE; STABILITY; DYNAMICS; DECAY; CHAIN SO - Physica D-Nonlinear Phenomena 2002 ;170(1):1-12 5846 UI - 12316 AU - Kosky RG AU - Silva MD AU - Perez LP AU - Gilliard T AU - Martinez FB AU - Vega MR AU - Milian MC AU - Mendoza EQ AD - Univ Cent Las Villas, Inst Biotecnol Plantas, Santa Clara 54830, Villa Clara, CubaUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoKosky, RG, Univ Cent Las Villas, Inst Biotecnol Plantas, Carretera Comajuani Km 5-5, Santa Clara 54830, Villa Clara, Cuba TI - Somatic embryogenesis of the banana hybrid cultivar FHIA-18 (AAAB) in liquid medium and scaled-up in a bioreactor AB - The development of somatic embryos in liquid culture medium has a number of advantages for large-scale propagation of plants. This paper describes an improved system for the mass propagation via somatic embryogenesis of the banana hybrid cultivar FHIA-18 (AAAB). Explants from immature male flowers were used to form high frequency embryogenic tissue, this tissue was then used to establish embryogenic cell suspensions in a basic MS medium plus 1.0 mg l(-1) biotin, 100 mg l(-1) glutamine, 100 mg l(-1) malt extract (Sigma), 1.0 mg l(-1) 2,4-D and 45 g l(-1) sucrose. Secondary multiplication of somatic embryos was achieved in liquid media in rotary shaker and in bioreactors. The number of embryos per litre obtained with 80.0% DO2 and effects of pH were also studied. A high regeneration percentage of plants were obtained (89.3%) in only 1 month of culture, somatic embryos were then placed to germinate in temporary immersion systems and field testing of somaclonal variation MH - Cuba MH - Mexico|Jalisco PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0167-6857 UR - ISI:000172384500001 L2 - bioreactors;cell density;dissolved oxygen;Musa;pH;somatic embryos;TEMPORARY IMMERSION; IMPROVEMENT; CULTURES; OXYGEN; MUSA SO - Plant Cell Tissue and Organ Culture 2002 ;68(1):21-26 5847 UI - 9752 AU - Kotov AA AU - Paggi JC AU - Elias-Gutierrez M AD - Colegio Frontera Sur, Chetumal 77000, Quintana Roo, MexicoAN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaInst Nacl Limnol, RA-3016 Santo Tome, S Fe, ArgentinaKotov, AA, Colegio Frontera Sur, Km 2 Carretera Chetumal Bacalar,Zona Ind 2, Chetumal 77000, Quintana Roo, Mexico TI - Redescription of Ilyocryptus brevidentatus Ekman, 1905 (Anomopoda, Cladocera, Branchiopoda) AB - The morphology of Ilyocryptus brevidentatus Ekman, 1905 is redescribed based on the syntypes from Falklands and South Georgia, and additional material from Signy Island and southern portion of Chile and Argentina. It is not possible to select a lectotype, and specify the exact type locality, because Ekman, or a subsequent investigator, mixed all specimens from all localities in one tube. A series of unique traits in the thoracic limbs of this species was revealed. A preliminary key for the discrimination of all adequately studied species of Ilyocryptus based exclusively on characters of their limbs is proposed. All Australian records of I. brevidentatus seem to apply to other species, superficially similar to it MH - Argentina MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000179387400001 L2 - Cladocera;Anomopoda;Ilyocryptus;systematics;redescription;South America;Subantarctic islands;SUB-ANTARCTIC ISLANDS; CHYDORIDAE; ARGENTINA SO - Hydrobiologia 2002 ;481(1-3):1-18 5848 UI - 10759 AU - Kotov AA AU - Elias-Gutierrez M AU - Williams JL AD - El Colegio Frontera Sur, Chetumal 77000, Quintana Roo, MexicoAN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaUniv So Mississippi Gulf Coast, Long Beach, MS 39560, USAKotov, AA, El Colegio Frontera Sur, Km 2 Carretera Chetumal Bacalar,Zona Ind 2, Chetumal 77000, Quintana Roo, Mexico TI - A preliminary revision of sordidus-like species of Ilyocryptus Sars, 1862 (Anomopoda, Branchiopoda) in North America, with description of I-bernerae n. sp AB - Presently the inter-generic structure of the Ilyocryptus Sars, 1862 is not clear, and we regard as ` sordidus-like' all the species with (1) incomplete moulting, (2) valves without lateral horns or other remarkable structures, (3) non-distal position of anus on postabdomen, (4) long lateral setae on the postabdomen, which reaches the anus; (5) single or doubled teeth on preanal margin of postabdomen. Available material on sordidus-like forms of Ilyocryptus Sars, 1862 (Anomopoda, Branchiopoda) from North America was investigated. We also analyzed a limited amount of material similar to I. sordidus s. str., but not enough to be presented now. Three other conventional species were found and redescribed: the exclusively North American I. gouldeni Williams, 1978, as well as I. cuneatus Stifter, 1988 and I. spinosus Stifter, 1988, both described earlier from Europe. An original analysis of the differences between all species was performed. A new sordidus-like species, I. bernerae n. sp., from a single locality in South Carolina, U.S.A., is described. The main diagnostic features of this new species within sordidus-like members of the Ilyocryptus are: thin and sharp dorsal keel; exclusively single preanal teeth, greatly increasing in size in basal direction; lateral setae on postabdomen, not decreasing in size basad; absence of denticles on base of postabdomen; complete absence of any denticles on distal and middle portion of ventral margin of postabdominal claws; distalmost spine on claw base longer than basalmost; bases of antennules compressed against each other (although not touching); slightly different armature of two sides of lateral swimming setae; presence of small hooks on tips of lateral swimming setae; distal segments of setae on trunk of limb I setulated only in basal portion; sensillum on gnathobase II curved MH - Mexico|Quintana Roo MH - Russia MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000176811800015 L2 - Ilyocryptus;Cladocera;Anomopoda;systematics;revision;North America;DAPHNIA CRUSTACEA; CLADOCERA; MACROTHRICIDAE; REDESCRIPTION; CHYDORIDAE; SMIRNOVI; COMPLEX; MEXICO; MEMBER SO - Hydrobiologia 2002 ;472(1-3):141-176 5849 UI - 10760 AU - Kotov AA AU - Dumont HJ AU - Van Damme K AD - El Colegio Frontera Sur, Chetumal 77000, Quintana Roo, MexicoAN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaState Univ Ghent, Inst Ecol, B-9000 Ghent, BelgiumKotov, AA, El Colegio Frontera Sur, Km 2 Carretera Chetumal Bacalar,Zona Ind 2, Chetumal 77000, Quintana Roo, Mexico TI - Redescription of Ilyocryptus sarsi Stingelin, 1913 AB - Ilyocryptus sarsi Stingelin, 1913, earlier regarded as a subspecies of I. sordidus Lievin, 1848, is a valid species, relatively common and widely distributed in South America. It is here redescribed based on material from a number of localities in Brazil. The type specimen is lost, and therefore a neotype is selected from Sars' (1901) specimens, hatched from dried mud from Ipiranga, Parana, Brazil. Differences between I. sarsi, I. sordidus and some other species are indicated. Recent problems in the systematics of the sordidus-group are discussed. The validity of all species in the sordidus-group described after Lievin and Stingelin is in need of checking MH - Belgium MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000176811800018 L2 - Cladocera;Anomopoda;Ilyocryptus;systematics;redescription;morphology;South America;ANOMOPODA; BRANCHIOPODA; MACROTHRICIDAE; CLADOCERA SO - Hydrobiologia 2002 ;472(1-3):207-222 5850 UI - 11276 AU - Kotov AA AU - Elias-Gutierrez M AD - Colegio Frontera Sur, Chetumal 77000, Quintana Roo, MexicoAN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaKotov, AA, Colegio Frontera Sur, Km 2Carretera Chetumal Bacalar,Zona Ind 2, Chetumal 77000, Quintana Roo, Mexico TI - Analysis of the morphology of Spinalona anophtalma Ciros-Perez & Elias-Gutierrez, 1997 (Aloninae, Anomopoda, Cladocera) AB - Morphology and variability of Spinalona anophtalma Elias-Gutierrez & Ciros-Perez, 1997 were re-examined using material from the original sample from type locality. As a result, some additions were given to the first description, and thoracic limbs were completely redescribed. We revealed and discussed some rare or unique traits of Spinalona, like a peculiar setulation on the labrum, distribution of aesthetascs in the antennular tip, position of the lateral seta on basal segment of endopodite of the second antenna, and the armature of swimming setae, and new structures on thoracic limbs. Although we confirmed previously reported opinion, that Spinalona is the most specific animal among Alonini, it clearly belongs to this taxon. The genus diagnosis was re-worked according to recent standards MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000175212000019 L2 - Spinalona anophtalma;Chydoridae;Anomopoda;Cladocera;limb;redescription;systematics;Mexico;1969 CHYDORIDAE; BRANCHIOPODA; REDESCRIPTION; GENUS; CONCHOSTRACA; DIPLOSTRACA; ASSIGNMENT; CRUSTACEA; PHYLOGENY; VASILJEVA SO - Hydrobiologia 2002 ;468(1-3):185-192 5851 UI - 10637 AU - Kovalenko DL AU - Gurin VS AU - Bogdanchikova NE AU - Prokopenko VB AU - Alexeenko AA AU - Melnichenko IM AD - GSU, Adv Mat Res Lab, Gomel 246699, ByelarusBSU, Physicochem Rese Inst, Minsk, ByelarusUNAM, CCMC, Ensenada, Baja California, MexicoUppsala Univ, Dept Earth Sci, Uppsala, SwedenGomel State Tech Univ, Gomel, ByelarusKovalenko, DL, GSU, Adv Mat Res Lab, Sovetskaya 104, Gomel 246699, Byelarus TI - Features of spectroscopy and formation process of silica sol-gel films doped with silver nanoparticles AB - Silver nanoparticles and clusters were produced within the conventional sol-gel process with tetraethylorthosilicate hydrolysis. The appearance of the reduced silver species was recorded by optical absorption spectroscopy as the plasmon resonances in the range of lambda < 370 nm, and the other absorption features (lambda < 370 nm) were prescribed to small silver clusters. The tuning of the preparation method can provide the participation of low-size pores in the sol-gel silica films like those in zeolites with regular cavities whose sizes are compatible with sizes of few-atomic clusters. (C) 2002 Elsevier Science B.V. All rights reserved MH - Byelarus MH - Mexico|Baja California MH - Sweden PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000177023400039 L2 - clusters;thin films;nanostructures;chemical synthesis;light absorption;RARE-GAS MATRICES; CLUSTERS; STABILIZATION SO - Journal of Alloys and Compounds 2002 ;341(1-2):208-210 5852 UI - 9628 AU - Kozanoglu BU AU - Vilchez JA AU - Casal J AU - Arnaldos J AD - Univ Las Amer, Mech Engn Dept, Puebla 72820, MexicoUniv Politecn Catalunya, Dept Chem Engn, Barcelona 08028, SpainKozanoglu, BU, Univ Las Amer, Mech Engn Dept, Puebla 72820, Mexico TI - Drying of solids in vacuum fluidized bed AB - A drying process in a fluidized, bed under vacuum conditions is experimentally and theoretically studied. A fluidized bed operating in reduced pressure presents a possibility for a better quality of production, with safer process conditions. A mathematical model is developed for the reduced-pressure drying process in a fluidized bed. Some parameters were analyzed by comparing experimental results with model predictions. The predictions from the model agreed quite closely with the experimental data. The results showed that a decrease in pressure reduces the interparticular resistance. A good agreement was also found applying the model to data, at atmospheric pressure, from other authors MH - Mexico|Puebla MH - Spain PB - OTTAWA: CANADIAN SOC CHEMICAL ENGINEERING RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0008-4034 UR - ISI:000179832300006 L2 - fluidization;drying modelling;parametric analysis;vacuum;REDUCED PRESSURE; MASS-TRANSFER; PREDICTION; PARTICLES; MODEL SO - Canadian Journal of Chemical Engineering 2002 ;80(3):376-385 5853 UI - 10405 AU - Kraan-Korteweg RC AU - Henning PA AU - Schroder AC AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandObserv Paris, Meudon, FranceUniv Groningen, Kapteyn Astron Inst, NL-9700 AB Groningen, NetherlandsKraan-Korteweg, RC, Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico TI - Parkes HI observations of galaxies behind the southern Milky Way - I. The Hydra/Antlia region (l approximate to 266 degrees to 296 degrees) AB - As part of our program to map the large-scale distribution of galaxies behind the Milky Way, we used the Parkes 210 ft (64 m) radio telescope for pointed HI observations of a sample of low surface-brightness (due to heavy obscuration) spiral galaxies selected from the deep optical Zone of Avoidance (ZOA) galaxy catalog in the Hydra/Antlia region (Kraan-Korteweg 2000a). Searching a simultaneous velocity range of either 300 to 5500 km s(-1) or 300 to 10 500 km s(-1) to an rms level of typically 2-4 mJy resulted in detections in 61 of the 139 pointings, leading to a total of 66 detections (an additional detection was made in a reference position, and two other pointings revealed two and four independent signals respectively). Except for 2 strong HI emitters identified in the shallow Zone of Avoidance HI survey (Henning et al. 2000), all HI detections are new. An analysis of the properties of the observed and detected galaxies prove that pointed HI observations of highly obscured galaxies allow the tracing of a population of nearby, intrinsically large and bright spiral galaxies that otherwise would not be recovered. The new data identified a previously unrecognized nearby group at l similar to 287.degrees5; b similar to -9.degrees5, V similar to 1700 km s(-1), the continuation of the Hydra/Antlia filament on the opposite side of the Galactic plane, and helped to delimit a distinct void in the ZOA centered at 2000 km s(-1) MH - United Kingdom MH - France MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000177590500009 L2 - catalogs;surveys;ISM : dust, extinction;galaxies : fundamental parameters;radio lines : galaxies;cosmology : large-scale structure of the Universe;GREAT-ATTRACTOR REGION; LARGE-SCALE STRUCTURES; HYDRA ANTLIA; SAAO; EXTENSION; CATALOG; MAPS SO - Astronomy & Astrophysics 2002 ;391(3):887-902 5854 UI - 10926 AU - Krasheninnikov SI AU - Soboleva TK AU - Catto PJ AD - Univ Calif San Diego, La Jolla, CA 92093, USAUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoIV Kurchatov Atom Energy Inst, Moscow 123182, RussiaMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139, USAKrasheninnikov, SI, Univ Calif San Diego, La Jolla, CA 92093, USA TI - Parallel flow and plasma equilibrium in a dipolar magnetic configuration AB - The effect of parallel plasma flow on plasma equilibrium in a dipolar magnetic configuration is investigated by considering a separable form of the magnetic flux function. Both analytical and numerical solutions of the plasma equilibrium are presented. These solutions are either sub-Alfvenic or just reach the Alfven velocity. The solution in the later case has an azimuthal current sheet located at the midplane and is characterized by flux surfaces which are squeezed about the equatorial plane and resemble disk like structures. No physically meaningful solutions with super-Alfvenic plasma flow are found. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000176219900016 L2 - plasma;dipole;equilibrium;Alfven velocity SO - Physics Letters A 2002 ;298(2-3):171-178 5855 UI - 11179 AU - Krist JE AU - Stapelfeldt KR AU - Watson AM AD - Space Telescope Sci Inst, Baltimore, MD 21218, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoKrist, JE, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA TI - Hubble Space Telescope/WFPC2 images of the GG Tauri circumbinary disk AB - We present the first visible wavelength images of the GG Tau circumbinary ring obtained with the Hubble Space Telescope's (HST) Wide Field and Planetary Camera 2. Scattered light from the ring is detected in both V- and I-band images. The images show that the ring is smooth, except for a small gap that could be a shadow caused by material between the stars and the ring. The spokes seen extending from the stars to the ring in ground-based adaptive optics images are not seen in our data, which suggests that they may be image artifacts. The nearside/farside surface brightness ratio is 6.9 in the I band, consistent with forward scattering by small dust grains. The azimuth of the peak ring surface brightness appears offset by 13degrees from the azimuth closest to us, as seen in previous near-IR HST observations. This may indicate that the ring is warped or somehow shadowed by the circumstellar disks. The color of the ring is redder than the combined light from the stars as observed by HST, confirming previous measurements that indicate that circumstellar disks may introduce extinction of light illuminating the ring. We detect a bright, compact arc of material 0."3 from the secondary star at an azimuth opposite the primary. It appears to be too large to be a circumstellar disk and is not at the expected location for dust trapped at a Lagrange point MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175527100027 L2 - binaries : general;circumstellar matter;stars : individual (GG Tauri);stars : pre-main-sequence;RING; WFPC2; MODELS SO - Astrophysical Journal 2002 ;570(2):785-792 5856 UI - 9688 AU - Krizek M AU - Luca F AU - Somer L AD - Acad Sci Czech Republ, Math Inst, CZ-11567 Prague 1, Czech RepublicUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoCatholic Univ Amer, Dept Math, Cardinal Stn, Washington, DC 20064, USAKrizek, M, Acad Sci Czech Republ, Math Inst, Zitna 25, CZ-11567 Prague 1, Czech Republic TI - On the convergence of series of reciprocals of primes related to the Fermat numbers AB - We examine densities of several sets connected with the Fermat numbers F-m = 2(2m) + 1. In particular, we prove that the series of reciprocals of all prime divisors of Fermat numbers is convergent. We also show that the series of reciprocals of elite primes is convergent. (C) 2002 Elsevier Science (USA) MH - Czech Republic MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0022-314X UR - ISI:000179557500007 L2 - Fermat numbers;elite primes;sum of reciprocals;density SO - Journal of Number Theory 2002 ;97(1):95-112 5857 UI - 10157 AU - Krokhin A AU - Izrailev F AU - Kuhl U AU - Stockmann HJ AU - Ulloa SE AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Marburg, Fachbereich Phys, D-35032 Marburg, GermanyOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAKrokhin, A, Univ Autonoma Puebla, Inst Fis, Apdo Post J-48, Puebla 72570, Mexico TI - Random 1D structures as filters for electrical and optical signals AB - We present experimental and theoretical studies of the transport properties of random ID site potentials. The key result is that exponentially weak transmissivity of a disordered system may be modified by finite correlations. We show that the long-range correlations give rise to a continuum of extended states, which are separated from localized states by mobility edges. For energies (or frequencies) between the mobility edges, the disordered system is transparent, while it is not outside this interval. We propose to exploit this property for filtering of electrical and optical signals. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000176869100139 L2 - localization;mobility edge;filter;correlations;RANDOM-DIMER MODEL; CORRELATED DISORDER; MOBILITY EDGE; LOCALIZATION; POTENTIALS SO - Physica E-Low-Dimensional Systems & Nanostructures 2002 ;13(2-4):695-698 5858 UI - 11004 AU - Krongold Y AU - Dultzin-Hacyan D AU - Marziani P AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsserv Astron Padova, INAF, I-35122 Padua, ItalyKrongold, Y, Univ Nacl Autonoma Mexico, Inst Astron, Apartamentado Postal 70-264, Mexico City 04510, DF, Mexico TI - The circumgalactic environment of bright IRAS galaxies AB - This paper systematically studies, for the first time, the circumgalactic environment of bright IRAS galaxies as defined in 1989 by Soifer and coworkers. While the role of gravitational interaction for luminous and ultraluminous IRAS galaxies has been well established by various studies, the situation is by far more obscure in the IR luminosity range of the bright IRAS sample, 10(10) L-. less than or similar toL(FIR) less than or similar to 10(11) L-.. To easily identify nearby companion galaxies, the bright IRAS sample is restricted to 87 objects with redshift range 0.008 less than or equal to z less than or equal to 0.018 and Galactic latitude delta greater than or equal to \30degrees\. A control sample, selected from the CfA redshift-survey catalog, includes 90 objects matching the IRAS bright galaxy survey sample for distribution of isophotal diameter, redshift, and morphological type. From a search of nearby companion galaxies within 250 kpc in the second-generation Digitized Sky Survey (DSS-II), we find that the circumgalactic environments of bright IRAS galaxies contain more large companions than the galaxies in the optically selected control sample and are similar to those of Seyfert 2 galaxies. We find a weak correlation over a wide range of far-IR luminosity (10(9) L-. less than or similar to L-FIR less than or similar to 10(12.5) L-.) between projected separation and L-FIR, which confirms a very close relationship between the star formation rate of a galaxy and the strength of gravitational perturbations. We also find that the far-IR colors depend on whether a source is isolated or interacting. Finally, we discuss the intrinsic difference between and evolution expectations for the bright IRAS galaxies and the control sample, as well as the relationship between starbursting and active galaxies MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176005100015 L2 - galaxies : interactions;galaxies : starburst;ACTIVE GALACTIC NUCLEI; SEYFERT-GALAXIES; STAR-FORMATION; INFRARED GALAXIES; COMPANIONS; MORPHOLOGY; EMISSION; QUASARS; MERGERS; CATALOG SO - Astrophysical Journal 2002 ;572(1):169-177 5859 UI - 11694 AU - Kryshtab TG AU - Khomchenko VS AU - Papusha VP AU - Mazin MO AU - Tzyrkunov YA AD - UPALM, ESFM Inst Polytech Natl, Dept Mat Sci, Mexico City 07738, DF, MexicoNAS Ukraine, ISP, UA-03028 Kiev, UkraineISP, Special Technol & Design Off, Kiev, UkraineKryshtab, TG, UPALM, ESFM Inst Polytech Natl, Dept Mat Sci, Av IPN,Edificio 9,Col Lindavista, Mexico City 07738, DF, Mexico TI - Thin ZnS : Cu,Ga and ZnO : Cu,Ga film phosphors AB - A new technique for electro- and cathodoluminescent screen fabrication with the application of a new method of doping ZnS:Cu and ZnO:Cu thin film phosphors is proposed. Thin films of ZnS:Cu were grown by electron-beam evaporation (EBE) from a ZnS:Cu target on substrates heated to 150-200degreesC, and the Cu concentration in the target was varied from 0.06 to 0.25 wt.%. BaTiO3 and sapphire single crystal substrates were used. The film thickness varied from 0.6 to 9 mum. Parameters of ZnS:Cu films grown by EBE were modified by the use of non-vacuum annealing at 700-1000degreesC in S-rich or O-2-rich atmosphere both with and without Ga co-doping. The measurement of electroluminescent (EL) and cathodoluminescent (CL) parameters, as well as X-ray diffraction (XRD) techniques and atomic force microscopy (AFM) were used for this research. The EL ZnS:Cu,Ga blue color emission film with a luminance of 30 cd/m(2) and green (yellow) color emission film with a luminance of 900 cd/m(2) were obtained. Devices with such films have a threshold voltage of 10 V. The CL luminance was 200 cd/m2 for ZnS:Cu,Ga and 1100 cd/m(2) for ZnO:Cu.Ga films at 300 K and 3700 cd/m(2) for ZnO:Cu.Ga films at 77 K. The films show a deeper green color than commercial phosphors. Clarification that gallium co-doping affects the luminance, since Ga influences on recrystallization process, has been carried out. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000174053800016 L2 - EBE;ZnS : Cu;ZnO : Cu;XRD;AFM;luminescence SO - Thin Solid Films 2002 ;403():76-80 5860 UI - 8969 AU - Kubli-Garfias C AU - Vazqueza R AU - Cooney AJ AU - Larrea F AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Lab Quim Hormonal, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Mol & Cellular Biol, Houston, TX 77030, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoKubli-Garfias, C, Natl Autonomous Univ Mexico, Inst Invest Biomed, Lab Quim Hormonal, Apartado Postal 70-469, Mexico City 04510, DF, Mexico TI - Ab initio electronic structure of the progestogen norethisterone and its 5 alpha-derivatives AB - The steroid 17alpha-ethynyl-19-nor-4-androsten-17beta-ol, 3-one (Norethisterone; NET) and its 5(x-dihydro (5alpha-NET), 3alpha- and 3beta-tetrahydro derivatives (3alpha,5beta- and 3beta,5alpha-NET), were comparatively studied by the ab initio quantum mechanics theory. Additionally, 5alpha-androstan-3beta,17beta-diol (ADIOL) was also studied. The Hartree-Fock method and the 6-31G* basis set were used to obtain the lowest energy conformation, geometries, electronic structure and physicochemical properties of the steroids. The results showed bond distances and valence angles similar among all steroids, but some differences in dihedral angles in the A-13-ring system were observed. The electronic structure analysis showed that NET has both frontier orbitals that is, the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) located at the C4-C5 pi-bond. In A-ring reduced derivatives, the HOMO was found at the 17beta-OH and ethynyl groups. In the case of 5alpha-NET, the LUMO was confined to the A-ring and its C3 carbonyl group while the two NET tetrahydro-reduced derivatives showed the LUMO at the 17beta-OH and ethynyl groups. The energy changes of the rotational barrier of the I7beta-OH group suggest that its movement is somewhat restricted by the 17alpha-ethynyl group. Interestingly both groups at C 17 form a single electrostatic potential with high electronic density. On the other side, the 19-nor condition increases the A-ring mobility. However, the 3beta-OH group of 3beta,5alpha-NET may rotate without significant energy differences as compared to the same group in ADIOL. The electronic structure of NET and its A-ring reduced derivatives explains in some extent their interaction with androgen and progesterone receptors as well as their selectivity for the estrogen alpha-receptor. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0960-0760 UR - ISI:000181412100014 L2 - NET;A-ring reduced NET metabolites;ab initio electronic structure;quantum mechanics;RING REDUCED METABOLITES; LIGAND-BINDING DOMAINS; ESTROGEN-RECEPTOR; PROGESTERONE; ALPHA SO - Journal of Steroid Biochemistry and Molecular Biology 2002 ;82(4-5):385-391 5861 UI - 11582 AU - Kuelbs J AU - Meda A AD - Univ Wisconsin, Dept Math, Madison, WI 53706, USANatl Autonomous Univ Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoKuelbs, J, Univ Wisconsin, Dept Math, 480 Lincoln Dr, Madison, WI 53706 USA TI - Rates of convergence for the Nummelin conditional weak law of large numbers AB - Let (B, parallel to . parallel to) be a real separable Banach space of dimension 1 less than or equal to d less than or equal to infinity, and assume X,X-1, X-2,... are i.i.d. B valued random vectors with law mu=L(X) and mean m=integral(B) xdmu(x). Nummelin's conditional weak law of large numbers establishes that under suitable conditions on (D subset of B, mu) and for every epsilon > 0, lim(n) P(parallel toS(n)/n-a(0)parallel to < ε\S-n/n &ISIN; D)=1, with a(0) the dominating point of D and S-n = &USigma;(n)(j=1) X-j. We study the rates of convergence of such laws, i.e., we examine lim(n) P(parallel toS(n)/n - a(0)parallel to < t/n(r)/S-n/n &ISIN; D) as d, r, t and D vary. It turns out that the limit is sensitive to variations in these parameters. Additionally, we supply another proof of Nummelin's law of large numbers. Our results are most complete when 1 &LE; d < infinity, but we also include results when d=infinity, mainly in Hilbert space. A connection to the Gibbs conditioning principle is also examined. (C) 2001 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0304-4149 UR - ISI:000174407900004 L2 - large deviation probabilities;dominating points;Nummelin's conditional law of large numbers;rates of convergence;conditional limit theorems;Gibbs conditioning principle;LARGE DEVIATIONS; DOMINATING POINTS SO - Stochastic Processes and Their Applications 2002 ;98(2):229-252 5862 UI - 10164 AU - Kumar GA AD - Ctr Invest Opt, Opt Mat Grp, Leon 37150, MexicoKumar, GA, Univ Electrocommun, Inst Laser Sci, Tokyo, Japan TI - Optical studies of phthalocyanine molecules in PMMA matrix AB - Optical absorption and emission spectral studies of various rare earth phthalocyanine (RePc) molecules in polymethyl methacrylate (PMMA) matrix have been reported for the first time. The recorded spectra are analyzed to yield the important spectral parameters such as optical absorption cross-section (sigma(a)), emission cross-section (sigma(c)), oscillator strength (f), dipole strength (q), fluorescence band width (Deltalambda), emission wavelength (lambda), radiative decay time (tau) and optical gain (G). Analysis shows that the emission cross-section and optical gain are maximum in the europium diphthalocyanine (EuH(Pc)(2))-doped PMMA matrix. A comparison of the calculated emission parameters with other polymer matrices viz. PVA and cyano acrylate, shows that they are smaller in the neodymium diphthalocyanine (NdH(Pc)(2)) and samarium, diphthalocyanine (SmH(Pc)(2))impregnated PMMA matrices. The parameters are found to be improved in the PMMA matrices of lanthanum phthalocyanine (LaPc) and EuH(PC)(2) as compared to the PVA matrix. On the other hand, these parameters greatly underestimate the values for all the PMMA-based systems as compared to the borate glassy systems. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000178331400004 L2 - phthalocyanine;polymethyl methacrylate;oscillator strength;radiative decay time;emission cross-section SO - Materials Letters 2002 ;55(6):364-369 5863 UI - 10311 AU - Kumar GA AU - Martinez A AU - De la Rosa E AD - Ctr Invest Opt AC AP, Leon 37160, MexicoKumar, GA, Univ Electrocommun, Inst Laser Sci, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan TI - Stimulated emission and radiative properties of Nd3+ ions in barium fluorophosphate glass containing sulphate AB - Spectroscopic properties of Nd3+ in barium fluorophosphate glassy matrix containing sulphate have been analysed by fitting the experimental data with the standard Judd-Ofelt theory. Various spectroscopic parameters viz. radiative transition probabilities, radiative decay time, fluorescence branching ratios, electric dipole line strengths, stimulated emission cross sections and optical gain of the principal fluorescence transition from the (4)f(3/2) metastable level are obtained. Results show that addition of sulphate to the fluorophosphate matrix will enhance the fluorescence spectral properties of Nd3+ considerably. Quantum efficiency of the F-4(3/2) emission is found to be higher than that of fluorophosphate glasses and stimulated emission cross section of the F-4(3/2)-->I-4(11/2) transition is the highest among all reported values. Quantitative estimation of the non-radiative processes such as multiphonon relaxation and quenching by water content was carried out and the results show that the water content is below the critical level for optimum laser performance. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000177829500008 L2 - fluorophosophate glass;absorption spectra;oscillator strength;fluorescence quenching;optical gain;Judd-Ofelt theory;PHOSPHATE-GLASSES; SULFATE GLASSES; TRANSITION; SPECTRA SO - Journal of Luminescence 2002 ;99(2):141-148 5864 UI - 11978 AU - Kumar GA AU - Thomas V AU - Jose G AU - Unnikrishnan NV AU - Nampoori VPN AD - Mahatama Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, Kerala, IndiaCtr Invest & Opt, Opt Mat Grp, Guanajuato 37000, MexicoCochin Univ Sci & Technol, Int Sch Photon, Cochin 682022, Kerala, IndiaUnnikrishnan, NV, Mahatama Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, Kerala, India TI - Optical properties of porphyrins in borate glassy matrix AB - Optical properties of free and substituted porphyrins (PP) doped borate glass matrix are reported for the first time. Absorption spectral measurements of H2TPP, CdTPP, MgTPP and ZnTPP doped borate glass matrix have been made in the 200-1100 nm region and the spectra obtained are analyzed to obtain the optical bandgap (E-g) and other important spectral parameters viz. oscillator strength (f), molar extinction coefficient (epsilon). electric dipole strength (q(2)), absorption cross-section (sigma(a)) and molecular concentration (N). Intense fluorescence was observed in the region 668-685 nm for CdTPP, ZnTPP and MgTPP doped matrices, whereas no such fluorescence was observed in H2TPP doped matrix. Fluorescence intensity was observed to be almost similar in all the metallated porphyrine matrices. Fluorescence bandwidth (Deltalambda), decay time (tau), stimulated emission cross-section (sigma) and optical gain (G) of the principal fluorescence transitions corresponding to the Q-band excitation were also evaluated and discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Guanajuato PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000173252100016 L2 - borate glass matrix;porphyrins;metallated porphyrine matrices;PHTHALOCYANINE SO - Materials Chemistry and Physics 2002 ;73(2-3):206-211 5865 UI - 10186 AU - Kumar H AD - Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoKumar, H, Proagro Seed Co, A-306,Ansals Chamber 1,3 Bhikaiji Cama Pl, New Delhi 110066, India TI - Plant damage and grain yield reduction by fall armyworm and stem borers on certain maize hybrids containing resistance genes from varying sources under experimental and farmers field conditions AB - The fall armyworm (FAW), Spodoptera frugiperda (J,E. Smith) is an important pest of maize in central, south and north America. The objective of this study was to examine certain hybrids with resistance to FAW and compare these hybrids with agronomically good (CML-AG) lines developed at the International Maize and Wheat Improvement Center (CIMMYT). The insect-resistant lines (CML-IR) used belonged to two categories: CML-IR with high inbreeding and CML-IR lines with low inbreeding derived from population 390. The following three categories of hybrids were examined in three different experiments: (1) CML-AG x CML-AG; (2) CML-AG x CML-IR (high inbreeding); (3) CML-AG x CML-IR (low inbreeding). The hybrids were grown along with CML67 x CML135 (resistant check), Ki3 x CML69 (susceptible check) and Criollo (local check). Resistance among CML-IR lines belonging to the first category (high inbreeding) was much more effective than that of second category in inhibiting FAW damage on the 24 hybrids tested. FAW caused much damage on the hybrids (CML-AG x CML-AG) but they still produced the highest yield. Leaf feeding resistance in the CML-AG x CML-IR hybrids did not cause any significant reduction of yield losses. Leaf feeding damage by FAW also did not cause any reduction in the growth of the CML-AG x CML-AG hybrids. In farmers fields, CML-AG x CML-IR hybrids were less damaged by FAW than CML-AG x CML-AG hybrids, but grain yield of the latter was significantly higher. Hybrids grown with a mulch suffered more stalk rot than those grown in the absence of mulch. Sources of resistance can be used therefore to reduce damage and less of yield caused by FAW provided that the grain yield is not the primary consideration. It is suggested that through conventional backcrossing procedures, inbred lines with desired levels of resistance and agronomic traits can be developed for utilization in breeding program to produce FAW resistant hybrids with high yields. (C) 2002 Published by Elsevier Science Ltd MH - India MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0261-2194 UR - ISI:000178268000007 L2 - fall armyworm;Spodoptera frugiperda;plant resistance;tillage;Zea mays;plant breeding;SOUTHWESTERN CORN-BORER; DIATRAEA-SACCHARALIS FABRICIUS; GRANDIOSELLA DYAR; SUGARCANE BORER; CHILO-PARTELLUS SO - Crop Protection 2002 ;21(7):563-573 5866 UI - 11505 AU - Kumar H AD - Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoKumar, H, Proagro Seed Co, A-306,Ansal Chambers 1,3 Bhikaiji Cama Pl, New Delhi 110066, India TI - Resistance in maize to the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera : Bostrichidae) AB - Host plant resistance in maize can be a useful component of Integrated Pest Management (IPM) of the Larger Grain Borer (LGB), Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae). The germplasm bank of the International Maize and Wheat Improvement Centre (CIMMYT) has more than 14,000 maize accessions from all over the world. In 1993, from the seed regeneration nursery of Caribbean land races, 105 land races were selected using good plant type as the criterion. When grains of these land races were infested with LGB in the laboratory, 19 showed resistance as evidenced by the low amount of powder (chewed uneaten maize plus feces) formed 140 days after the infestation. Through a series of infestation, selection and inbreeding (self-pollination of land races) over four generations, S-3 maize ears were generated. These ears showed a high level of resistance as indicated by a low powder production relative to the susceptible control. The LGB reproduction was adversely affected on resistant ears as indicated by the small size of adult populations. Thus, antibiosis could be the mechanism of resistance operating within the S3 progenies of selected land races. Such sources of resistance can be very useful in developing maize populations/ hybrids for use in IPM of LGB. (C) 2002 Elsevier Science Ltd. All rights reserved MH - India MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0022-474X UR - ISI:000174637400007 L2 - plant resistance;Prostephanus truncatus;Zea mays;stored products;DIATRAEA-SACCHARALIS FABRICIUS; SITOPHILUS-ZEAMAIS MOTSCH; SOUTHWESTERN CORN-BORER; GRANDIOSELLA DYAR; SUGARCANE BORER; HYBRIDS; TOGO SO - Journal of Stored Products Research 2002 ;38(3):267-280 5867 UI - 11611 AU - Kumar H AU - Mihm JA AD - CIMMYT, Mexico City 06600, DF, MexicoKumar, H, Proagro Seed Co, A-306,Ansal Chambers-1,3 Bhikaiji Cama Pl, New Delhi 110066, India TI - Fall armyworm (Lepidoptera : Noctuidae), southwestern corn borer (Lepidoptera : Pyralidae) and sugarcane borer (Lepidoptera : Pyralidae) damage and grain yield of four maize hybrids in relation to four tillage systems AB - Zero tillage can be used tactic to prevent soil erosion and save the top soil for maize production. The effects of tillage systems on the growth, grain yield and resistance of maize hybrids against fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), sugarcane borer (SCB), Diatraea saccharalis Fabricius and southwestern corn borer (SWCB), Diatraea grandiosella (Dyar) were examined. Four single cross hybrids used were: Ki3 x CML139 (resistant), Ki3 x CML131 (susceptible), CML67 x CML135 (resistant) and Ki3 x CML69 (susceptible). These hybrids were sown on land with conventional tillage, minimum tillage and zero tillage, with and without mulch, in infested and insecticide-protected plots. The resistance/susceptibility of these hybrids against FAW, SCB and SWCB was not altered by the tillage systems. Hybrids planted under zero-tillage +mulch suffered significantly higher damage by SCB and FAW probably because of the retention of moisture in the mulch, which provided optimum conditions for larval feeding. Damage by SWCB on hybrids was the same in different tillage systems because of relatively dry conditions prevailing in the trial. Grain yield of the four hybrids was generally higher in zero-tilled plots in comparison to conventional or minimum tillage systems. These observations support the use of zero-tillage for maize production. Data also show that FAW infestation at 4-5 leaf stage caused grain yield reduction of 10-13% across all tillage systems in the tropical environment but in a subtropical environment, yield reduction was only 1-2%. Grain yield of the hybrids Ki3 x CML139 and Ki3 x CML69 was affected by SCB infestation in all the tillage systems but that of CML67 x 135 and Ki3 x CML131 was not affected. SWCB infestation on the hybrid Ki3 x CML131 was less in the infested plots but that of remaining hybrids was the same in infested and protected plots in different tillage systems. Thus, zero-tillage can be used on community-wide basis to prevent the soil erosion and save our dwindled soil resources. (C) 2002 Elsevier Science Ltd. All rights reserved MH - India MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0261-2194 UR - ISI:000174435900005 L2 - Diatraea grandiosella;Diatraea saccharalis;Spodoptera frugiperda;Zea mays L.;tillage;plant resistance;DIATRAEA-SACCHARALIS FABRICIUS; GRANDIOSELLA DYAR; RESISTANCE SO - Crop Protection 2002 ;21(2):121-128 5868 UI - 10299 AU - Kunchur MN AU - Ivlev BI AU - Knight JM AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoKunchur, MN, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA TI - Shear fragmentation of unstable flux flow AB - When free flux flow is pushed beyond its instability, the homogeneous flow becomes spatially distorted leading to a new class of dynamic phases with steps in resistivity. At high-flux densities B, the relatively incompressible vortex matter fragments into domains of constant shear curvature, leading to a horizontal-sawtooth-shaped current-voltage characteristic. Measurements on Y1Ba2Cu3O7-delta films confirm this behavior and are quantitatively consistent with the model, which has no adjustable parameters MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000177911700018 L2 - SUPERCONDUCTORS; REGIME SO - Physical Review B 2002 ;66(6): 5869 UI - 11042 AU - Kunth D AU - Legrand F AU - Tenorio-Tagle G AU - Silich S AU - Mas-Hesse JM AU - Cervino M AD - Inst Astrophys, F-75014 Paris, FranceInst Astrofis Opt & Elect N, Puebla 72000, MexicoINTA, LAEFF, E-28080 Madrid, SpainObserv Midi Pyrenees, F-31400 Toulouse, FranceKunth, D, Inst Astrophys, 98bis Bld Arago, F-75014 Paris, France TI - Metals from star-forming dwarfs: Retention or ejection? AB - We show evidences that gas outflows occur in starburst galaxies as superbubbles evolve. We then question whether hot gas will be expelled and enrich the IGM with metals or be retained within the host galaxy. For this purpose we construct three extreme scenarios of the star formation histories for a sample of dwarf galaxies using either their present metallicity or their luminosity. The three scenarios imply different mechanical energy input rates, those are compared with theoretical lower limits for the ejection of processed matter out of host galaxies. The comparison strongly points at the existence of extended gaseous haloes acting as a barrier that allows these galaxies to retain their metals and enhance their abundance. Our findings strongly point that continuous star-forming processes, rather than coeval bursts, must contribute to the overall metallicity in our galaxy sample MH - France MH - Mexico|Puebla MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000175921200052 L2 - metals;star-forming galaxies;superbubbles;ISM;INTERSTELLAR-MEDIUM; GALAXIES; MATTER; ALPHA SO - Astrophysics and Space Science 2002 ;281(1-2):261-266 5870 UI - 7016 AU - Kuppermann BD AU - Quiroz-Mercado H AU - Graute-Wieebers F AU - Thomas EL AU - Calvillo PN AU - Grillone LR AD - Univ Calif Irvine, Dept Ophthalmol, Irvine, CA, USALa Ceguera Hosp, Mexico City, DF, MexicoConde Valenciana, Mexico City, DF, MexicoRetina Vitreous Associates, Los Angeles, CA, USAISTA Pharmaceut Inc, Irvine, CA, USA TI - Effect of intravitreous hyaluronidase (Vitrase (R)) on progression of diabetic retinopathy in humans MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606701017 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U1110-U1110 5871 UI - 9476 AU - Kurdyumov V AU - Fernandez-Tarrazo E AU - Linan A AD - Inst Nacl Tecn Aeroespacial, Madrid, SpainInst Tecnol Veracruz, Veracruz, MexicoUPM, ETSI Aeronaut, Madrid, SpainFernandez-Tarrazo, E, Inst Nacl Tecn Aeroespacial, Madrid, Spain TI - The anchoring of gaseous jet diffusion flames in stagnant air AB - A numerical analysis is presented to describe the structure of the attachment region of gaseous jet diffusion flames in stagnant air. For the typical Reynolds numbers encountered in applications, the region of flame attachment, in the near wake at the injector, rim, is small compared with the injector radius. The local flow, which we consider to be laminar, quasi-steady and two-dimensional, is determined by the wall value of the fuel stream velocity gradient and the chemical reaction time or residence time in the premixed flame of a stoichiometric mixture of the fuel stream and required amount of air. When the Karlovitz number, or product of the velocity gradient and the flame residence,time, grows above a critical value the flame is lifted off the injector. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Mexico|Veracruz MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Aerospace U5 - J;Article AV - English IS - 1270-9638 UR - ISI:000180230900005 L2 - flame attachment;diffusion flame;flame anchoring;jet combustion;methane flame;FLOW SO - Aerospace Science and Technology 2002 ;6(7):507-516 5872 UI - 11527 AU - Kurdyumov VN AU - Fernandez-Tarrazo E AD - Inst Nacl Tecn Aerospacial, Madrid, SpainUPM, ETSI Aeronaut, Madrid, SpainInst Tecnol Veracruz, Veracruz, MexicoKurdyumov, VN, Inst Nacl Tecn Aerospacial, Madrid, Spain TI - Lewis number effect on the propagation of premixed laminar flames in narrow open ducts AB - The propagation of premixed laminar flames with different Lewis numbers in open ducts of circular cross-section is investigated numerically in a thermal-diffusive model. Ducts with adiabatic and cold isothermal walls are considered. The existence of multiple solutions in the case of an isothermal wall is demonstrated and a quenching radius is determined. When the Lewis number is less than unity the flame velocities in ducts with an isothermal wall may exceed those in ducts with an adiabatic wall of the same diameter, because of the appearance of cellular structures, which increase the curvature effect triggered by the boundary conditions at the wall. (C) 2002 by The Combustion Institute MH - Mexico|Veracruz MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Thermodynamics;Energy & Fuels;Engineering, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0010-2180 UR - ISI:000174675500004 L2 - CELLULAR FLAMES; FRAGMENTATION; EXTINCTION; STABILITY SO - Combustion and Flame 2002 ;128(4):382-394 5873 UI - 11325 AU - Kushwaha MS AU - Martinez G AD - Concordia Univ, Dept Phys, Montreal, PQ H3G 1M8, CanadaUniv Autonoma Puebla, Inst Phys, Puebla 72570, MexicoKushwaha, MS, Concordia Univ, Dept Phys, 1455 Maisonneuve Blvd W, Montreal, PQ H3G 1M8, Canada TI - Magnetic-field-dependent band gaps in two-dimensional photonic crystals AB - This paper concerns the first band-structure determination of two-dimensional periodic semiconductor-dielectric photonic crystals in the presence of an applied magnetic field. We introduce an augmented-block-matrix method that allows to transform the determination of photonic band structure for H polarization into a standard eigenvalue problem. The complete polarization-dependent band gaps are reported for a filling fraction f=10%, for both square and hexagonal arrangements MH - Canada MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000175147100012 L2 - 2-DIMENSIONAL SYSTEMS; SPONTANEOUS EMISSION; PERIODIC STRUCTURES; COMPOSITES SO - Physical Review B 2002 ;65(15): 5874 UI - 9746 AU - Kussul E AU - Baidyk T AU - Ruiz-Huerta L AU - Caballero-Ruiz A AU - Velasco G AU - Kasatkina L AD - Natl Autonomous Univ Mexico, Ctr Instruments, Mexico City 04510, DF, MexicoNatl Acad Sci Ukraine, Int Res & Training Ctr Informat Technol & Syst, UA-03680 Kiev, UkraineKussul, E, Natl Autonomous Univ Mexico, Ctr Instruments, Cd Univ,AP 70-186, Mexico City 04510, DF, Mexico TI - Development of micromachine tool prototypes for microfactories AB - At present, many areas of industry have strong tendencies towards miniaturization of products. Mechanical components of these products as a rule are manufactured using conventional large-scale equipment or micromechanical equipment based on microelectronic technology (MEMS). The first method has some drawbacks because conventional large-scale equipment consumes much energy, space and material. The second method seems to be more advanced but has some limitations, for example, two-dimensional (213) or 2.5-dimensional shapes of components and materials compatible with silicon technology. In this paper, we consider an alternative technology of micromechanical device production. This technology is based on micromachine tools (MMT) and microassembly devices, which can be produced as sequential generations of microequipment. The first generation can be produced by conventional large-scale equipment. The machine tools of this generation can have overall sizes of 100-200 mm. Using microequipment of this generation, second generation microequipment having smaller overall sizes can be produced. This process can be repeated to produce generations of micromachine tools having overall sizes of some millimetres. In this paper we describe the efforts and some results of first generation microequipment prototyping. A micromachining centre having an overall size of 130 x 160 x 85 mm(3) was produced and characterized. This centre has allowed us to manufacture micromechanical details having sizes from 50 mum to 5 mm. These details have complex three-dimensional shapes (for example, screw, gear, graduated shaft, conic details, etc), and are made from different materials, such as brass, steel, different plastics etc. We have started to investigate and to make prototypes of the assembly microdevices controlled by a computer vision system. In this paper we also describe an example of the applications (microfilters) for the proposed technology MH - Mexico|Distrito Federal MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Instruments & Instrumentation;Materials Science, Multidisciplinary;Mechanics U5 - J;Article AV - English IS - 0960-1317 UR - ISI:000179510600011 L2 - MICRO-HEAT-EXCHANGERS; ACTUATORS SO - Journal of Micromechanics and Microengineering 2002 ;12(6):795-812 5875 UI - 10869 AU - Kuz'menkov LS AU - Maksimov SG AD - Moscow MV Lomonosov State Univ, Moscow, RussiaInst Tecnol Morelia, Mexico City, DF, MexicoKuz'menkov, LS, Moscow MV Lomonosov State Univ, Moscow, Russia TI - Distribution functions in quantum mechanics and Wigner functions AB - We formulate and solve the problem of finding a distribution function F(r, p, t) such that calculating statistical averages leads to the same local values of the number of particles, the momentum, and the energy as those in quantum mechanics. The method is based on the quantum mechanical definition of the probability density not limited by the number of particles in the system. The obtained distribution function coincides with the Wigner function only for spatially homogeneous systems. We obtain the chain of Bogoliubov equations, the Liouville equation for quantum distribution functions with an arbitrary number of particles in the system, the quantum kinetic equation with a self-consistent electromagnetic field, and the general expression for the dielectric permittivity tensor of the electron component of the plasma. In addition to the known physical effects that determine the dispersion of longitudinal and transverse waves in plasma, the latter tensor contains a contribution from the exchange Coulomb correlations significant for dense systems MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0040-5779 UR - ISI:000176246100006 L2 - Wigner function;microscopic BBGKY hierarchy;kinetic equation;Coulomb correlations;SYSTEMS; HYDRODYNAMICS; FERMIONS SO - Theoretical and Mathematical Physics 2002 ;131(2):641-650 5876 UI - 11865 AU - Kwok OH AU - Prpic R AU - Gaspar J AU - Mathey DG AU - Escobar A AU - Goldar-Najafi A AU - Reifart N AU - Ischinger TA AU - Popma JJ AD - Harvard Univ, Sch Med, Div Cardiovasc,Dept Med, Brigham & Womens Hosp, Boston, MA 02138, USANatl Inst Cardiol, Mexico City, DF, MexicoKlinikum Bogenhausen, Div Cardiol, Munich, GermanyCtr Cardiol & Vasc Intervent, Hamburg, GermanyClin Medellin, Medellin, ColombiaMain Taunus Heart Inst, Bad Soden, GermanyKwok, OH, Grantham Hosp, Angiog Core Lab, Kwok Tak Seng Heart Ctr 5F, Univ Dept Med, 125 Wong Chuk Hang Rd, Aberdeen, Hong Kong, Peoples R China TI - Angiographic outcome after intracoronary X-Sizer helical atherectomy and thrombectomy: First use in humans AB - The objective of this study was to evaluate the early angiographic outcome in the first human subjects who underwent intracoronary atherectomy and thrombectomy using the X-Sizer helical cutting and aspiration system. Percutaneous coronary interventions in patients with thrombo-occlusive disease or friable degenerative saphenous vein grafts are associated with considerable periprocedural morbidity and mortality, predominantly related to microscopic distal embolization. X-Sizer catheter system is a novel atherectomy and thrombectomy device that consists of a helix cutter connected to a handheld motor drive unit and a vacuum collection chamber for aspiration of excised atheroma, thrombus, and debris. Quantitative coronary angiography was obtained in 14 patients before and after X-Sizer extraction atherectomy with adjunctive balloon angioplasty and stenting. Thirteen native coronary arteries and one saphenous vein graft were treated. Mean preprocedural reference vessel diameter was 3.06 +/- 0.66 mm. There were 71.4% AHA/ACC type 132 and C lesions. Preprocedural thrombus was present in nine patients and total occlusion in 64% of cases. Minimal luminal diameter was increased from 0.29 +/- 0.47 mm to 1.32 +/- 0.64 mm, a gain of 1.04 +/- 0.69 mm after atherectomy. Final total gain was 1.47 +/- 0.61 mm. Mean diameter stenosis was reduced from 89.3% to a final residual stenosis of 14.4%. Postatherectomy distal embolization occurred in one patient who had heavy preprocedural thrombus burden. No episodes of perforation, distal coronary spasm, abrupt closure, or slow/no-reflow occurred. The angiographic analysis of the first cohort of human subjects suggests that X-Sizer helical atherectomy is a feasible method of removing occlusive tissue or thrombus in coronary artery disease with a low angiographic complication rate. A large-scale randomized phase 11 clinical trial is underway to determine the ultimate safety and efficacy of this device in thrombo-occlusive native coronary arteries and saphenous vein grafts. (C) 2002 Wiley-Liss, Inc MH - Colombia MH - Germany MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 11 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 1522-1946 UR - ISI:000173617000001 L2 - angioplasty;transluminal;percutaneous;atherectomy;treatment outcome;TRANSLUMINAL EXTRACTION ATHERECTOMY; SAPHENOUS-VEIN GRAFTS; ACUTE MYOCARDIAL-INFARCTION; NATIVE CORONARY-ARTERIES; NO-REFLOW PHENOMENON; DISTAL EMBOLIZATION; CATHETER; INTERVENTION; ANGIOPLASTY; THROMBUS SO - Catheterization and Cardiovascular Interventions 2002 ;55(2):133-139 5877 UI - 8378 AU - Laine L AU - Connors LG AU - Reicin A AU - Hawkey CJ AU - Burgos-Vargas R AU - Schnitzer TJ AU - Yu Q AU - Bombardier C AU - Corral C AU - Daruwala P AD - Merck & Co Inc, Whitehouse Stn, NJ, USAUniv Nottingham, Nottingham NG7 2RD, EnglandHosp Gen Mexico City, Mexico City, DF, MexicoNorthwestern Univ, Chicago, IL 60611, USAUniv Toronto, Toronto, ON, CanadaMerck Sharp & Dohme Ltd, Madrid, SpainUniv So Calif, Sch Med, Los Angeles, CA 90089, USA TI - Serious lower GI clinical events with nonselective NSAID or coxib use: A double-blind GI outcomes trial of naproxen vs. rofecoxib MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain MH - USA PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100160 SO - Osteoporosis International 2002 ;13():S60-S60 5878 UI - 10575 AU - Lalezari J AU - Lindley J AU - Walmsley S AU - Kuppermann B AU - Fisher M AU - Friedberg D AU - Lalonde R AU - Matheron S AU - Nieto L AU - Torriani FJ AU - Van Syoc R AU - Sutton MA AU - Buhles W AU - Stempien MJ AD - Quest Clin Res, San Francisco, CA 94115, USASt Pauls Hosp, Vancouver, BC, CanadaUniv Toronto, Toronto Gen Hosp, Toronto, ON M5G 1L7, CanadaUniv Calif Irvine, Irvine, CA, USARoyal Sussex Cty Hosp, Brighton, E Sussex, EnglandNew York Univ, Med Ctr, New York, NY, USAMcGill Univ, Hlth Ctr, Montreal, PQ, CanadaHop Bichat Claude Bernard, Paris, FranceHosp Reg Zona Gabriel Mancera, Del Valle, MexicoUniv Calif San Diego, Antiviral Res Ctr, San Diego, CA, USARoche Pharmaceut, Palo Alto, CA, USALalezari, J, Quest Clin Res, 2300 Sutter St,Suite 202, San Francisco, CA 94115 USA TI - A safety study of oral valganciclovir maintenance treatment of cytomegalovirus retinitis AB - Valganciclovir, an oral prodrug of the anti-cytomegalovirus (CMV) agent ganciclovir, was evaluated in a single-arm open-label safety study. AIDS patients (median CD4 lymphocyte count of 140 cells/muL) with treated CMV retinitis (N = 212) received 900-mg once-daily valganciclovir maintenance therapy with courses of 900-mg twice-daily valganciclovir induction therapy as needed to treat progression. After a median treatment duration of 372 days, the adverse event profile was similar to that reported for intravenous (IV) and oral ganciclovir. Adverse event rates of note were diarrhea (35%), nausea (23%), fever (18%), neutropenia (absolute neutrophil count <500 cells/muL) (10%), and anemia (hemoglobin <8.0 g/dL) (12%). Consistent with prior treatment studies of oral ganciclovir, IV catheter-related adverse events were uncommon (6%) and lower than previously reported for IV ganciclovir. The mortality rate was 0.072 deaths per patient-year. Progression of CMV retinitis occurred in 17% of patients during the study treatment period, usually in association with a low CD4 cell count. Other than a higher than expected frequency of oral candidiasis (17%), no clinical toxicities or laboratory abnormalities occurred during treatment with valganciclovir that have not been observed during treatment with ganciclovir MH - USA MH - Canada MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 12 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1525-4135 UR - ISI:000177144800003 L2 - cytomegalovirus;retinitis;ganciclovir;valganciclovir;opportunistic infection;AIDS;HUMAN-IMMUNODEFICIENCY-VIRUS; LIVER-TRANSPLANT RECIPIENTS; ANTIRETROVIRAL THERAPY; ANTICYTOMEGALOVIRUS THERAPY; CONTROLLED TRIAL; CMV RETINITIS; GANCICLOVIR; AIDS; DISEASE; PHARMACOKINETICS SO - Journal of Acquired Immune Deficiency Syndromes 2002 ;30(4):392-400 5879 UI - 11762 AU - Lammers PI AU - Rubio-Aurioles E AU - Castell R AU - Castaneda J AU - de Leon RP AU - Hurley D AU - Lipezker M AU - Loehr LA AU - Lowrey F AD - Zonagen Inc, The Woodlands, TX 77380, USAAssoc Mexicana Salud Sexual Mexico, Mexico City, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoEstadist & Clin Asociados, Mexico City, DF, MexicoLammers, PI, Zonagen Inc, 2408 Timberloch Pl,Suite B-4, The Woodlands, TX 77380 USA TI - Combination therapy for erectile dysfunction: a randomized, double blind, unblinded active-controlled, cross-over study of the pharmacodynamics and safety of combined oral formulations of apomorphine hydrochloride, phentolamine mesylate and papaverine hydrochloride in men with moderate to severe erectile dysfunction AB - Oral therapy has become first line treatment for patients with mild to moderate erectile dysfunction (ED). Studies have shown that sildenafil may not be effective in all patients, and has been associated with a variety of adverse effects and an adverse interaction with nitrates and inhibitors of cytochrome P450 enzymes. The objective was to compare the efficacy and safety of three different oral combinations with the highest dose of sildenafil in men with moderate to severe ED. Randomized, double blind, unblinded active-controlled, Phase II study was carried out at three sites in Mexico. After a 4-week placebo run-in period, patients received all four of the following treatments using a 4-way cross-over design: 40 mg phentolamine (PM) + 6 mg apomorphine (Apo); 40 mg PM + 150 mg papaverine (Pap); 40 mg PM + 6 mg Apo + 150 mg Pap (Tricombo); 100 mg sildenafil (SC). With the exception of sildenafil tablets, all study medication was blinded. Moderate to severe ED was defined as a less than 50% vaginal penetration success rate during the placebo run-in period. A total of 44 patients were enrolled, of whom 36 completed all four treatinent periods. All treatments produced a significant effect in primary efficacy variable (Sexual Encounter Profile) compared to baseline, however, no statistically significant differences were found between treatments. A significant period effect was observed. Also, the four treatments were found not to differ significantly in five out of six secondary efficacy variables. The lowest incidence of treatment-related adverse events (AE) occurred in the 40 mg PM + 6 mg Apo group (9.8%), followed by 100 mg SC (15%), and the other two combinations (16.7 and 17.5%, respectively). Nasocongestion and headache were the most frequently reported A.E. An oral combination of vasoactive agents may provide an alternative approach to sildenafil. Based on these results a combination of phentolamine and apornorphine warrants further clinical investigation MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 10 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0955-9930 UR - ISI:000173991500009 L2 - erectile dysfunction;impotence;pharmacodynamics;safety;oral combination;apomorphine;phentolamine;papaverine;SILDENAFIL CITRATE SO - International Journal of Impotence Research 2002 ;14(1):54-59 5880 UI - 10135 AU - Lamprea MR AU - Cardenas FP AU - Vianna DM AU - Castilho VM AU - Cruz-Morales SE AU - Brandao ML AD - FFCLRP, LAb Psicobiol, BR-14049901 Ribeirao Preto, BrazilUNAM, Lab Psychopharmacol, FES Iztacala, Mexico City 54090, DF, MexicoBrandao, ML, FFCLRP, LAb Psicobiol, Campus USP,Av Bandeirantes 3900, BR-14049901 Ribeirao Preto, Brazil TI - The distribution of fos immunoreactivity in rat brain following freezing and escape responses elicited by electrical stimulation of the inferior colliculus AB - Several sources of evidence indicate that the inferior colliculus also integrates acoustic information of an aversive nature besides its well-known role as a relay station for auditory pathways. Gradual increases of the electrical stimulation of this structure cause in a hierarchical manner alertness, freezing and escape behaviors. Independent groups of animals implanted with bipolar electrodes into the inferior colliculus received electrical stimulation at one of these aversive thresholds. Control animals were submitted to the same procedure but no current was applied. Next, analysis of Fos protein expression was used to map brain areas activated by the inferior colliculus stimulation at each aversive threshold and in the controls. Whereas alertness elicited by stimulation of the inferior colliculus did not cause any significant labeling in any structure studied in relation to the respective control, electrical stimulation applied at the freezing threshold increased Fos-like immunoreactivity in the central amygdaloid nucleus and entorhinal cortex. In contrast, escape response enhanced Fos-like immunoreactivity in the nucleus cuneiform and the dorsal periaqueductal gray matter of the mesencephalon. This evidence supports the notion that freezing and escape behaviors induced by electrical stimulation of the inferior colliculus activate different neural circuitries in the brain. Both defensive behaviors caused significant expression of c-fos in the frontal cortex, hippocampus and basolateral amygdaloid nucleus. This indistinct pattern of c-fos distribution may indicate a more general role for these structures in the modulation of fear-related behaviors. Therefore, the present data bring support to the notion that amygdala, dorsal hippocampus, entorhinal cortex, frontal cortex, dorsal periaqueductal gray matter and cuneiform nucleus altogether play a role in the integration of aversive states generated at the level of the inferior colliculus. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000178477600021 L2 - fos expression;freezing;escape;fear;inferior colliculus;amygdala;periaqueductal gray matter;DORSAL PERIAQUEDUCTAL GRAY; UNCONDITIONED AVERSIVE STIMULI; ELEVATED PLUS-MAZE; FREELY MOVING RATS; C-FOS; DEFENSIVE BEHAVIOR; MESSENGER-RNA; DOPAMINE RELEASE; CONDITIONED FEAR; NEUROCHEMICAL MECHANISMS SO - Brain Research 2002 ;950(1-2):186-194 5881 UI - 9839 AU - Lang IG AU - Korovin LI AU - Contreras-Solorio DA AU - Pavlov ST AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Escuela Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaLang, IG, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - A manifestation of the magnetopolaron effect in reflection and absorption of light by a three-level system in a quantum well AB - The absorption and reflection of light by a quantum well are investigated in the case of two closely spaced levels of electronic excitations in the well. The dependences of the dimensionless absorptance A and reflectance R on the frequency omega(l) of the exciting light are calculated. The overall sequence of processes involving absorption and reemission of photons is taken into account. This is beyond the scope of the perturbation theory for the photon-electron coupling constant. It is shown that the perturbation theory is inapplicable when the reciprocal radiative lifetimes of excitations are comparable to the reciprocal nonradiative lifetimes. In this case, the nontrivial dependences A(omega(l)) and R(omega(l)) are obtained. The total reflection and the total transparency points are determined. The relationships derived are used to analyze the special case of two excitation levels that are formed in the quantum well in a strong magnetic field H normal to its plane due to the Johnson-Larsen magnetopolaron effect. The reciprocal radiative lifetimes of electron-hole pairs are calculated far from and in the vicinity of the magnetophonon resonance. It is found that these lifetimes are proportional to H in the range far from the resonance and depend strongly on the difference H-H-res in the vicinity of the resonance. The dependences of the coefficients A and R on the magnetic field H at different frequencies of the exciting light are deduced. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000179042500028 L2 - RAMAN-SCATTERING; MAGNETIC-FIELD; PHONON INTERACTION; DISPERSION; RESONANCE; EXCITONS; SPECTRUM; PULSE SO - Physics of the Solid State 2002 ;44(11):2181-2195 5882 UI - 11214 AU - Lange CG AU - Lederman MM AU - Madero JS AU - Medvik K AU - Asaad R AU - Pacheko C AU - Carranza C AU - Valdez H AD - Univ Hosp Cleveland, Dept Med, Div Infect Dis, Cleveland, OH 44106, USACase Western Reserve Univ, Dept Med, Div Infect Dis, Ctr AIDS Res, Cleveland, OH 44106, USAInst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoInst Nacl Enfemedades Resp, Mexico City, DF, MexicoLederman, MM, Univ Hosp Cleveland, Dept Med, Div Infect Dis, 2061 Cornell Room 301 C, Cleveland, OH 44106 USA TI - Impact of suppression of viral replication by highly active antiretroviral therapy on immune function and phenotype in chronic HIV-1 infection AB - We compared immune phenotypes, lymphocyte proliferation (LP), and delayed type hypersensitivity (DTH) responses in 28 male antiretroviral treatment-naive and experienced HIV-1-infected patients, matched pair-wise according to age and CD4(+) T-lymphocyte count. Median CD4(+) T-lymphocyte counts Were 441 cells/muL and 483 cells/muL and median CD4(+) T-lymphocyte nadirs were 435 cells/muL and 150 cells/muL in both groups, respectively. Absolute numbers of circulating T-lymphocyte subpopulations and proportions of naive and memory T-lymphocytes were comparable in the two groups. Untreated patients had greater proportions of activated CD4(+) (p < .05) and CD8(+) (p < .01) T-cells expressing human leukocyte antigen (HLA)DR and CD38 and fewer CD8(+) cells expressing CD28 (p < .05). DTH and LP responses were comparable in both groups except for filVp24, LP responses, and mumps DTH responses, which were of greater magnitude in the group treated with highly active antiretroviral therapy (HAART) (p < .05). Thus, HIV-1-infected patients who experienced substantial increases in CD4(+) T-lymphocyte counts after suppression of viral replication on HAART had fewer activated lymphocytes and similar immune function when compared with Findings in untreated patients with similar CD4(+) T-cell counts. HIV replication has minimal real-time effect on CD4(+) T-cell function in response to non-HIV antigens but helper T-cell responses to HIV-gag antigen are impaired during ongoing viral replication and may be restored by antiretroviral therapy MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1525-4135 UR - ISI:000175401600005 L2 - HIV;CD4(+) nadir;HAART;immune function;phenotype;lymphoproliferation;DTH;HIV p24;HUMAN-IMMUNODEFICIENCY-VIRUS; T-CELL SUBSETS; LYMPHOCYTE PROLIFERATIVE RESPONSES; DISEASE PROGRESSION; PROTEASE INHIBITOR; ACTIVATION MARKERS; TYPE-1 INFECTION; PROGNOSTIC VALUE; CD28 EXPRESSION; RECONSTITUTION SO - Journal of Acquired Immune Deficiency Syndromes 2002 ;30(1):33-40 5883 UI - 11411 AU - Langer A AU - Villar J AD - Populat Council, Latin Amer & Caribbean Off, Mexico City 04000, DF, MexicoWHO, Dept Reprod Hlth & Res, CH-1211 Geneva 27, SwitzerlandLanger, A, Populat Council, Latin Amer & Caribbean Off, Escondida 110, Mexico City 04000, DF, Mexico TI - Promoting evidence based practice in maternal care - Would keep the knife away MH - Mexico|Distrito Federal MH - Switzerland PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 11 U4 - Medicine, General & Internal U5 - J;Editorial Material AV - English IS - 0959-535X UR - ISI:000175179500002 SO - British Medical Journal 2002 ;324(7343):928-929 5884 UI - 9931 AU - Lares ML AU - Flores-Munoz G AU - Lara-Lara R AD - Ctr Invest Cientif & Educ Super, Dept Ecol, Ensenada 22800, Baja California, MexicoUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoLares, ML, CICESE, Dept Ecol, POB 434844, San Diego, CA 92143, USA TI - Temporal variability of bioavailable Cd, Hg, Zn, Mn and Al in an upwelling regime AB - Monthly variability of Cd, Hg, Zn, Mn and Al concentrations in mussels (Mytilus californianus) soft tissue and brown seaweed (Macrocystis pyrifera) was studied at a pristine rocky shore off San Quintin Bay, Baja California, Mexico. The results were related to climatic and hydrographic conditions and to the physiological state of the mussels (condition index) by correlation analysis and principal component analysis (PCA). A "normalization" to account for the variability induced by the physiological state of the mussel was performed. The PCA was performed in two ways to relate the environmental variables and the condition index to: (1) the metal concentrations in mussels, and (2) the "normalized" mussel concentrations. The association of the variability of Cd with the upwelling season was revealed in both PCAs. The temporal variability of this metal in mussels was highly correlated to that in seaweed, suggesting that the dissolved phase determined the variability of Cd in mussels. However, for Hg, Zn, Mn and Al the results from both PCAs were different. The first PCA showed the relationship of these metals to pluvial precipitation and to the condition index. The PCA for the normalized mussel concentrations showed that, after eliminating the effect of the condition index, only Al was related to pluvial precipitation. Manganese, and to a less degree Zn, were related to these metals in seaweed. Because zinc is an essential element in mussels, some regulation of their internal concentrations is likely. Mercury was not detected in seaweed, but because of its reactive nature, it is not expected that the dissolved fraction could be a significant pathway; therefore, it can be concluded that its temporal variability was determined by the variability in the condition index only. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 13 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000179013200012 L2 - temporal variation;mussels;seaweed;trace metals;Cd;Hg;Zn;Mn;Al;NORTHEAST PACIFIC WATERS; HEAVY-METALS; TRACE-METALS; MYTILUS CALIFORNIANUS; BAJA-CALIFORNIA; BROWN SEAWEED; MUSSEL-WATCH; CADMIUM; INDICATOR; ALUMINUM SO - Environmental Pollution 2002 ;120(3):595-608 5885 UI - 11614 AU - Larios GB AU - Sivinski J AU - Holler T AU - Aluja M AD - ARS, USDA, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USALab Aurora, Programa Moscamed, Guatemala City, GuatemalaAPHIS, USDA, PPQ, PPPC,DPI, Gainesville, FL 32602, USAInst Ecol AC, Xalapa 91000, Veracruz, MexicoSivinski, J, ARS, USDA, Ctr Med Agr & Vet Entomol, POB 14565, Gainesville, FL 32604 USA TI - The effects of chilling on the fecundity and life span of mass-reared parasitoids (Hymenoptera : Braconidae) of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera : Tephritidae) AB - Suppression of Mediterranean fruit fly (medfly), Ceratitis capitata (Wiedemann), populations may be achieved through the mass-rearing and augmentative aerial release of opiine braconid parasitoids. Typically, aerial release techniques require up to one hour of chilling of adult parasitoids at temperatures as low as 3.5degreesC prior to their dissemination. Such chilling potentially could affect the subsequent performance of the insects. Among three species of the genus Diachasmimorpha longicaudata (Ashmead), tryoni (Cameron), and krausii (Fullaway) there was little or no affect of chilling in the laboratory on female longevity, production of daughters, or offspring sex ratio. This is consistent with previous experiments that found chilling to have no discernable effect on the short-term mortality of D. tryoni or on its ability to take flight immediately after aerial release. While there was little effect of chilling on longevity and fecundity in a species from another opiine genus, Fopius arisanus (Sonan), exposure to low temperatures did result in a significantly more male-biased offspring sex ratio MH - USA MH - Guatemala MH - Mexico|Veracruz PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 0958-3157 UR - ISI:000174500700006 L2 - medfly;Diachasmimorpha;augmentative biological control;aerial releases;SUPPRESSION; POPULATION SO - Biocontrol Science and Technology 2002 ;12(2):205-215 5886 UI - 11019 AU - Larraga ME AU - del Rio JA AU - Mehta A AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoSN Bose Natl Ctr Basic Sci, Calcutta 700098, W Bengal, IndiaLarraga, ME, Univ Nacl Autonoma Mexico, Ctr Invest Energia, AP 34, Temixco 62580, Morelos, Mexico TI - Two effective temperatures in traffic flow models: analogies with granular flow AB - We present a model of traffic flow, with rules that describe the behaviour of automated vehicles in an open system. We show first of all that the fundamental diagram of this system collapses to a point, where states of free and jammed traffic can coexist in phase space. This leads us to consider separately the roles of average velocities and densities as better descriptors of the actual state of the traffic. Next, we observe that the transition between free and jammed traffic as a function of the braking parameter R is different for high and low initial densities, in the steady state; it turns out to be 'smeared out' for low densities, a behaviour which is already portended by the transient behaviour of the system. Our results indicate strongly that, at least for such models, two effective temperatures (one related to R, and the other to the density) are needed to describe the global behaviour of this system in statistical mechanical terms. Analogies with granular flow are discussed in this context. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000175975500015 L2 - VIBRATED POWDERS; DYNAMICS; SYSTEMS; RHEOLOGY; GASES SO - Physica A-Statistical Mechanics and Its Applications 2002 ;307(3-4):527-547 5887 UI - 10085 AU - Larramendi EM AU - Lopez-Luna E AU - de Melo O AU - Hernandez-Calderon I AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Havana, Fac Phys, Havana, CubaLarramendi, EM, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Interaction between Zn and Cd atoms during the atomic layer epitaxy growth of CdZnTe/ZnTe quantum wells AB - Layers of 6 and 16 Cd-Te-Zn-Te periods were grown by atomic layer epitaxy (ALE) within ZnTe thin films. Different samples were grown at substrate temperatures of 260 and 290degreesC. Information about the kinetics of growth and surface reconstruction during the ALE growth of CdTe and ZnTe films, and Cd-Te-Zn-Te periods was obtained by means of reflection high-energy electron diffraction (RHEED) experiments and through the analysis of the temporal behavior of the intensities of several features of the RHEED patterns. The photoluminescence of the sample grown at 260degreesC presents two narrow and intense peaks corresponding to emission from quantum wells (QWs). However, the spectrum of the samples grown at 290degreesC does not show any feature associated with QWs, the spectrum resembling that of a ZnTe film. Cd replacement by Zn atoms explains the absence of the CdZnTe QWs at 290degreesC and a lower Cd content than expected at 260degreesC. The replacement of Cd atoms by Zn atoms in the CdTe surface was clearly demonstrated by Auger experiments MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400023 L2 - MBE SO - Surface Review and Letters 2002 ;9(5-6):1725-1728 5888 UI - 11924 AU - Larramendi EM AU - Puron E AU - de Melo O AD - Univ Havana, Fac Phys, IMRE, Havana, CubaIPN, CINVESTAV, Dept Phys, Mexico City 07738, DF, MexicoLarramendi, EM, Univ Havana, Fac Phys, IMRE, Colina Univ, Havana, Cuba TI - Thickness measurement and optical properties of very thin ZnxCd(1-x)Te layers AB - A theoretical procedure based on the model dielectric function is, used to fit he room temperature reflectivity spectra of ZnxCd1-xTe alloys in the range 1.5-4.5 eV. This procedure allows calculation of the thickness of very thin films as well as determination of the composition dependence of the critical points. A parabolic dependence on Zn molar fraction is reported. Calculated optical data, such as refractive index and extinction coefficient, are also presented MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000173432500002 L2 - TERNARY ALLOYS; CONSTANTS; CDTE; PARAMETERS; GROWTH SO - Semiconductor Science and Technology 2002 ;17(1):8-12 5889 UI - 11917 AU - Larrybia MA AU - Gutierrez-Alejandre A AU - Ramirez J AU - Busca G AD - Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, ItalyUniv Nacl Autonoma Mexico, UNICAT, Dept Ingn Quim, Fac Quim, Mexico City 04510, DF, MexicoUniv Malaga, Dept Ingn Quim, E-29071 Malaga, SpainBusca, G, Univ Genoa, Dipartimento Ingn Chim & Proc, Ple JF Kennedy, I-16129 Genoa, Italy TI - A FT-IR study of the adsorption of indole, carbazole, benzothiophene, dibenzothiophene and 4,6-dibenzothiophene over solid adsorbents and catalysts AB - The adsorption of benzothiophene (BT), dibenzothiophene (DBT), 4,6-dimethyldibenzothiophene (DMDBT), dibenzofuran (DBF). indole (IND) and carbazole (CARB) on alumina, zirconia and magnesia has been studied by IR spectroscopy. The main adsorption process is due to adsorption on Lewis sites or on acid-base pairs. On alumina the adsorption is strongest, desorption being not obtained above 723 K. BT also undergoes a transformation with likely the heteroaromatic ring opening. Adsorption of 4,6-DBT is definitely limited in extent likely due to steric hindrance. The N-containing compounds IND and CARB are adsorbed dissociatively with breaking of the NH bond. (C) 2002 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000173486300016 L2 - FT-IR;indole;benzothiophene;dibenzothiophene;4,6-dibenzothiophene;alumina;magnesia;zirconia;carbazole;HYDRODESULFURIZATION; OXIDES SO - Applied Catalysis A-General 2002 ;224(1-2):167-178 5890 UI - 9903 AU - Lasserre JB AU - Zeron ES AD - CNRS, LAAS, F-31077 Toulouse 4, FranceInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoLasserre, JB, CNRS, LAAS, 7 Ave Colonel Roche, F-31077 Toulouse 4, France TI - Solving the knapsack problem via Zeta-transform AB - Given vectors a, c is an element of Z(n) and b is an element of Z, we consider the (unbounded) knapsack optimization problem P: min {c'x \ a'x = b; x is an element of N-n}. We compute the minimum value p* using techniques from complex analysis, namely Cauchy's Residue Theorem to integrate a function in C-2, and the Z-transform of an appropriate function related to P. The computational complexity depends on s:= Sigma(j=1)(n) a(j), not on the magnitude of b as in dynamic programming based approaches. We also completely characterize the number of solutions with value less than p, as a function of p. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6377 UR - ISI:000179012500006 L2 - LATTICE POINTS; POLYTOPES SO - Operations Research Letters 2002 ;30(6):394-400 5891 UI - 10433 AU - Laundre JW AU - Hernandez L AD - Inst Ecol AC, Aldama 32900, Chihuahua, MexicoIdaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USALaundre, JW, Inst Ecol AC, Km 33-3 Carretera Chihuahua Ojinaga, Aldama 32900, Chihuahua, Mexico TI - Growth curve models and age estimation of young cougars in the northern Great Basin AB - We analyzed mass growth of 96 cougars (Puma concolor) from south-central Idaho and northwestern Utah with a Richards growth curve, tested the applicability of the curve for total body length and tail length, and tested whether changes in mass, total length, and tail length could be used to predict ages of voting animals. The Richards curve provided good fits of the data for mass (M: R-2 = 0.986; F: R-2 = 0.966), total length (M: R-2 = 0.961; F: R-2 = 0.958), and tail length (M: R-2 = 0.949; F: R-2 = 0.948). The mass growth model analysis indicated differences in sex for adult mass, growth rate, and birth weight. The growth model for total length indicated a sex effect for adult total length. The model for tail length was free of any sex effects. Separate simple linear regressions of the log(e)(age) to the log(e)(mass), log(e)(total), and log(e)(tail length) provided good fits of the data for males and females (r(mass)(2) = 0.957 and 0.938, r(total length)(2) = 0.939 and 0.968, and r(tail length)(2) = 0.918 and 0.955, respectively). We propose that models based on body mass, total length, and tail length are useful in studying the biology and ecology of cougar populations and developing sound management policies for this species MH - Mexico|Chihuahua MH - USA PB - BETHESDA: WILDLIFE SOC RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Zoology U5 - J;Article AV - English IS - 0022-541X UR - ISI:000177475600027 L2 - age estimates;cougar;Great Basin;growth models;Idaho;mass;Puma concolor;Richards curve;total length;Utah;COLORADO SO - Journal of Wildlife Management 2002 ;66(3):849-858 5892 UI - 10686 AU - Laureano JSF AU - Navar J AD - Univ Toronto, Fac Forestry, Toronto, ON M5S 3B3, CanadaUANL, Fac Ciencias Forestales, Linares 67700, Nuevo Leon, MexicoNavar, J, Univ Toronto, Fac Forestry, 33 Wilcocks St, Toronto, ON M5S 3B3, Canada TI - An assessment of stream water quality of the Rio San Juan, Nuevo Leon, Mexico, 1995-1996 AB - Good water quality of the Rio San Juan is critical for economic development of northeastern Mexico. However, water quality of the river has rapidly degraded during the last few decades. Societal concerns include indications of contamination problems and increased water diversions for agriculture, residential, and industrial water supplies. Eight sampling sites were selected along the river where water samples were collected monthly for 10 mo (October 1995-July 1996). The concentration of heavy metals and chemical constituents and measurements of bacteriological and physical parameters were determined on water samples. In addition, river discharge was recorded. Constituent concentrations in 18.7% of all samples exceeded at least one water quality standard. In particular, concentrations of fecal and total coliform bacteria, sulfate, detergent, dissolved solids, Al, Ba, Cr, Fe, and Cd, exceeded several water quality standards. Pollution showed spatial and temporal variations and trends. These variations were statistically explained by spatial and temporal changes of constituent inputs and discharge. Samples collected from the site upstream of El Cuchillo reservoir had large constituent concentrations when discharge was small; this reservoir supplies domestic and industrial water to the city of Monterrey MH - Canada MH - Mexico|Nuevo Leon PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0047-2425 UR - ISI:000176918200022 SO - Journal of Environmental Quality 2002 ;31(4):1256-1265 5893 UI - 10154 AU - Lavaniegos BE AU - Jimenez-Perez LC AU - Gaxiola-Castro G AD - Ctr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada 22800, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Marine Life Res Grp, La Jolla, CA 92093, USALavaniegos, BE, Ctr Invest Cient & Educ Super Ensenada, Dept Ecol, Km 107 Carr,Tijuana Ensenada,Apdo Postal 2732, Ensenada 22800, Baja California, Mexico TI - Plankton response to El Nino 1997-1998 and La Nina 1999 in the southern region of the California Current AB - The IMECOCAL Program began in 1997, with the objective of sampling plankton systematically in the Mexican region of the California Current. We present results of chlorophyll a concentrations and zooplankton displacement volumes for the eight cruises from September 1997 to October 1999. The abundance of 22 zooplankton groups was also analyzed for the first four cruises. The response of plankton to the 1997-1998 El Nino was atypical. From September 1997 to January 1998, chlorophyll a and zooplankton volume were at typical values (median integrated chlorophyll was 27 mg/m(2) and zooplankton 100 ml/1000 m(3) in 9801/02). After the peak of El Nino, the system shifted to cooler conditions. Integrated chlorophyll gradually increased to a median of 77 mg/m(2) in April 1999. In contrast, zooplankton volumes decreased from October 1998 onward, despite favorable phytoplankton availability in 1999. Zooplankton structure was dominated by copepods and chaetognaths through the ENSO cycle, but interannual changes were evident. In the fall of 1997 there was a higher proportion of copepods, chaetognaths, and other minor groups, while the fall of 1998 zooplankton was richer in salps and ostracods. Historical data from previous Baja California CalCOFI cruises indicated that zooplankton volumes measured during the IMECOCAL cruises were above the longterm mean for the period 1951-1984. This suggests a differential response of plankton to the El Nino of 1997-1998 compared to the El Nino of 1957-1959. Regional differences in zooplankton volumes were also found, with central Baja California having 41% higher biomass than northern Baja California. Volumes from both regions were larger than those recorded by CalCOFI off southern California during 1997-1998, but the situation was reversed in 1999. The higher biomasses in the 1997-1998 El Nino can be attributed to high abundance of salps, which showed an affinity with warm, saline water. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Oceanography U5 - J;Article AV - English IS - 0079-6611 UR - ISI:000178308900003 L2 - BAJA-CALIFORNIA; CURRENT SYSTEM; PACIFIC-OCEAN; ZOOPLANKTON; VARIABILITY; TRANSITION; EVOLUTION; BIOMASS; OREGON; STATE SO - Progress in Oceanography 2002 ;54(1-4):33-58 5894 UI - 11086 AU - Lavariega JC AU - Urban SD AD - Ctr Invest Informat, Monterrey 64849, NL, MexicoArizona State Univ, Dept Comp Sci & Engn, Tempe, AZ 85287, USALavariega, JC, Ctr Invest Informat, ITESM Campus Monterrey, Monterrey 64849, NL, Mexico TI - An object algebra approach to multidatabase query decomposition in Donaji AB - This paper presents an approach to query decomposition in a multidatabase environment. The unique aspect of this approach is that it is based on performing transformations over an object algebra that can be used as the basis for a global query language. In the paper, we first present our multidatabase environment and semantic framework, where a global conceptual schema based on the Object Data Management Group standard encompasses the information from heterogeneous data sources that include relational databases as well as object-oriented databases and flat file sources. The meta-data about the global schema is enhanced with information about virtual classes as well as virtual relationships and inheritance hierarchies that exist between multiple sources. The AQUA object algebra is used as the formal foundation for manipulation of the query expression over the multidatabase. AQUA is enhanced with distribution operators for dealing with data distribution issues. During query decomposition we perform an extensive analysis of traversals for path expressions that involve virtual relationships and hierarchies for access to several heterogeneous sources. The distribution operators defined in algebraic terms enhance the global algebra expression with semantic information about the structure, distribution, and localization of the data sources relevant to the solution of the query. By using an object algebra as the basis for query processing, we are able to define algebraic transformations and exploit rewriting techniques during the decomposition phase. Our use of an object algebra also provides a formal and uniform representation for dealing with an object-oriented approach to multidatabase query processing. As part of our query processing discussion, we include an overview of a global object identification approach for relating semantically equivalent objects from diverse data sources, illustrating how knowledge about global object identity is used in the decomposition and assembly processes MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Information Systems;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0926-8782 UR - ISI:000175855700002 L2 - multidatabase systems;query processing;object algebras;SYSTEMS SO - Distributed and Parallel Databases 2002 ;12(1):27-71 5895 UI - 10091 AU - Lazcano A AU - Bada JL AD - Natl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USALazcano, A, Natl Autonomous Univ Mexico, Fac Ciencias, Apdo Postal 70-407,Cd Univ, Mexico City 04510, DF, Mexico TI - Discussing the origin of life - Response MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000178791200024 SO - Science 2002 ;298(5594):749-749 5896 UI - 8217 AU - Lazo-Langner A AU - Lome-Maldonado C AU - Piedras J AU - Gaulard P AU - Quintanilla-Martinez L AU - Lopez-Karpovitch X AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHop Henri Mondor, F-94010 Creteil, FranceGSF, Inst Pathol, Neuherberg, Germany TI - Fludarabine/Rituximab-Induced cytogenetic remission in a patient with B-cell prolymphocytic leukemia bearing Burkitt's variant translocation t(2;8)(p12;q24.1) MH - France MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000179184801556 SO - Blood 2002 ;100(11):364B-364B 5897 UI - 10485 AU - Le Creurer IJ AU - Marmolejo F AU - Vitale EM AD - Univ Catholique Louvain, Dept Math, B-1348 Louvain, BelgiumUniv Nacl Autonoma Mexico, Area Invest Cient, Mexico City 04510, DF, MexicoVitale, EM, Univ Catholique Louvain, Dept Math, Chemin Cyclotron 2, B-1348 Louvain, Belgium TI - Beck's theorem for pseudo-monads AB - In this work we establish a 2-categorical analogue of Beck's theorem characterizing monadic functors. We show that a 2-functor (a pseudo-functor) U is monadic iff it is a right pseudo-adjoint, it reflects adjoint equivalences and it creates U-absolute pseudo-coequalizers of codescent objects. (C) 2002 Elsevier Science B.V. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000177328300005 L2 - BICATEGORIES SO - Journal of Pure and Applied Algebra 2002 ;173(3):293-313 5898 UI - 10165 AU - Leanos-Castaneda O AU - Van Der Kraak G AU - Lister A AU - Sima-Alvarez R AU - Gold-Bouchot G AD - CINVESTAV, Unidad Merida, Dept Recursos Mar, Merida 97310, Yucatan, MexicoUniv Guelph, Dept Zool, Guelph, ON N1G 2W1, CanadaLeanos-Castaneda, O, CINVESTAV, Unidad Merida, Dept Recursos Mar, Carretera Antigua Progreso Km 6,Ap Postal 73 Cord, Merida 97310, Yucatan, Mexico TI - o,p '-DDT induction of vitellogenesis and its inhibition by tamoxifen in Nile tilapia (Oreochromis niloticus) AB - In order to investigate the mechanism by which o,p'-DDT disrupts endocrine functioning of Nile tilapia in vivo, the estrogenicity of o,p'-DDT was investigated in conjunction with 17beta-pestradiol (E-2) and tamoxifen. Mature, male tilapia were treated intraperitoneally with o,p'-DDT (60 mg/kg, one dose) or E-2 (5 mg/kg, four doses) in the presence or absence of tamoxifen (5 mg/kg, six doses) for 12 days and then plasma vitellogenin (Vtg) (measured as alkaline-labile phosphorous), E-2, and testosterone (T) were measured. Vtg levels were increased dramatically by E-2 (1744 +/- 171 mug/ml) and moderately by op'-DDT (82 +/- 15 mug/ml) compared with controls (23 +/- 13.5 mug/ml). Tamoxifen alone had no effect on Vtg production, but inhibited both E-2 and op'-DDT stimulated vitellogenesis. T levels were reduced with E-2 administration (1688 +/- 383 pg/ml) and declined further with the combined treatment of E-2 and tamoxifen (281 +/- 70 pg/ml), compared with controls (6558 +/-1438 pg/ml). Tamoxifen or o,p'-DDT alone did not affect T levels, but their combined treatment did (2069 +/- 647 pg/ml). The results of this-study suggest that op'-DDT is weakly estrogenic in male tilapia, and that this activity may be mediated through the estrogen receptor. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Yucatan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 14 U4 - Environmental Sciences;Marine & Freshwater Biology;Toxicology U5 - J;Article AV - English IS - 0141-1136 UR - ISI:000178360100087 L2 - DDT;tamoxifen;vitellogenin;estradiol;testosterone;tilapia;fish;endocrine disruption;antiestrogen;ESTROGEN-RECEPTOR; CHEMICALS; GOLDFISH; BINDING; TROUT SO - Marine Environmental Research 2002 ;54(3-5):703-707 5899 UI - 11266 AU - Lecchi M AU - Redaelli E AU - Rosati B AU - Gurrola G AU - Florio T AU - Crociani O AU - Curia G AU - Cassulini RR AU - Masi A AU - Arcangeli A AU - Olivotto M AU - Schettini G AU - Possani LD AU - Wanke E AD - Univ Milano Bicocca, Dipartimento Biotecnol & Biosci, I-20126 Milan, ItalyNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62271, Morelos, MexicoUniv G DAnnunzio Chieti, Dept Biomed Sci, I-66013 Chieti, ItalyUniv Florence, Dept Gen Pathol & Oncol, I-50134 Florence, ItalyUniv Genoa, Dept Oncol, Adv Biotechnol Ctr, Natl Canc Res Inst,Sect Pharmacol & Neurosci, I-16132 Genoa, ItalyWanke, E, Univ Milano Bicocca, Dipartimento Biotecnol & Biosci, Piazza Sci 2, I-20126 Milan, Italy TI - Isolation of a long-lasting eag-related gene-type K+ current in MMQ lactotrophs and its accommodating role during slow firing and prolactin release AB - Native rat lactotrophs express thyrotrophin-releasing hormone-dependent K+ currents consisting of fast and slow deactivating components that are both sensitive to the class III antiarrhythmic drugs that block the eag-related gene (ERG) K+ current (I-ERG). Here we describe in MMQ prolactin-releasing pituitary cells the isolation of the slowly deactivating long-lasting component (I-ERGS), which, unlike the fast component (I-ERGF), is insensitive to verapamil 2 muM but sensitive to a novel scorpion toxin (ErgTx-2) that hardly affects I-ERGF. The time constants of I-ERGS activation, deactivation, and recovery from inactivation are more than one order of magnitude greater than in I-ERGF, and the voltage-dependent inactivation is left-shifted by similar to25 mV. The very slow MMQ firing frequency (similar to0.2 Hz) investigated in perforated patch is increased approximately four times by anti-arrhythmic agents, by ErgTx-2, and by the abrupt I-ERGS deactivation. Prolactin secretion in the presence of anti-arrhythmics is three- to fourfold higher in comparison with controls. We provide evidence from I-ERGS and I-ERGF simulations in a firing model cell to indicate that only I-ERGS has an accommodating role during the experimentally observed very slow firing. Thus, we suggest that I-ERGS potently modulates both firing and prolactin release in lactotroph cells MH - Italy MH - Mexico|Morelos PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 22 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000175296200019 L2 - K+ channels;lactotrophs;firing;anterior pituitary cells;erg genes;prolactin release;ANTERIOR-PITUITARY-CELLS; POTASSIUM CHANNEL; RAT LACTOTROPHS; I-KR; CARDIAC-ARRHYTHMIA; FUNCTIONAL-ROLE; MESSENGER-RNA; HERG ENCODES; HORMONE; MODULATION SO - Journal of Neuroscience 2002 ;22(9):3414-3425 5900 UI - 10755 AU - Ledesma-Montes C AU - Mosqueda-Taylor A AU - Carlos-Bregni R AU - De Leon ER AU - Meneses-Garcia A AU - Palma-Guzman M AU - Paez-Valencia C AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana, Mexico City, DF, MexicoServ Diagnost Clin & Patol, Guatemala City, GuatemalaUniv Nuevo Leon, San Nicolas De Los Garza, Nuevo Leon, MexicoInst Nacl Cancerol, Mexico City, DF, MexicoUniv Autonoma Puebla, Puebla 72570, Mexico TI - Differences among cystic and solid ameloblastoma. Analysis of 163 Latin American cases MH - Guatemala MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|Puebla PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Meeting Abstract AV - English IS - 0022-0345 UR - ISI:000176024704025 SO - Journal of Dental Research 2002 ;81():A496-A496 5901 UI - 10397 AU - Ledig FT AU - Hodgskiss PD AU - Jacob-Cervantes V AD - US Forest Serv, USDA, Pacific SW Res Stn, Inst Forest Genet, Placerville, CA 95667, USAColegio Postgrad Ciencias Agr, Especialidad Bot, Mexico City 56230, DF, MexicoLedig, FT, US Forest Serv, USDA, Pacific SW Res Stn, Inst Forest Genet, 2480 Carson Rd, Placerville, CA 95667 USA TI - Genetic diversity, mating system, and conservation of a Mexican subalpine relict, Picea mexicana Martinez AB - Mexican spruce (Picea mexicana Martinez), an endangered species of the highest sky islands in Mexico's Sierra Madre Oriental and Sierra Madre Occidental, is threatened by fire, grazing, and global warming. Its conservation depends on whether it also is threatened by inbreeding and loss of genic diversity. We used 18 isozyme markers in 12 enzyme systems to assay genic diversity, characterize the mating system, and test for recent bottlenecks in three known populations. Unbiased, expected heterozygosity (H-e) averaged 0.125. Despite a separation of 676 km between populations in the Sierra Madre Oriental and the Sierra Madre Occidental, Wright's F-ST, the proportion of total genic diversity among populations, was only 6.9%. Nei's genetic distance was 0.001 between the populations in the Sierra Madre Oriental and more than an order of magnitude greater, 0.019, between the Sierra Madre Oriental and Sierra Madre Occidental. However, both values point to relatively recent divergence. Mating systems were predominantly outcrossing, but with significant selling. Multilocus estimates of selling varied from 19% to 41%, and the means of single-locus estimates were higher, suggesting that additional inbreeding occurred by mating among relatives. Despite significant inbreeding, observed heterozygosity was as high as or higher than H-e; Wright's fixation index, F-IS, was -0.107. Under the observed level of selfing, positive values of F-IS were expected. Therefore, selection against inbreds and homozygotes must be intense. Cornuet-Luikart tests indicate recent bottlenecks in at least two of the three populations. The results suggest that Mexican spruce is a genetically viable species, and threats are primarily environmental MH - USA MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 19 U4 - Biodiversity Conservation;Genetics & Heredity U5 - J;Article AV - English IS - 1566-0621 UR - ISI:000177685600002 L2 - bottlenecks;endangered species;fragmentation;global warming;isozymes;ALLELE FREQUENCY DATA; POPULATION; SPRUCE; HETEROZYGOSITY; PROGRAM; PINE SO - Conservation Genetics 2002 ;3(2):113-122 5902 UI - 10190 AU - Lee WH AU - Ramirez-Ruiz E AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandLee, WH, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Accretion disks around black holes: Dynamical evolution, meridional circulations, and gamma-ray bursts AB - We study the hydrodynamic evolution of massive accretion disks around black holes, formed when a neutron star is disrupted by a black hole in a binary system. The initial conditions are taken from three-dimensional calculations of coalescing binaries. By assuming azimuthal symmetry we are able to follow the time dependence of the disk structure for 0.2 s in cylindrical coordinates (r, z). We use an ideal gas equation of state and assume that all the dissipated energy is radiated away. The disks evolve because of viscous stresses, modeled with an alpha law. We study the disk structure and, in particular, the strong meridional circulations that are established and persist throughout our calculations. These consist of strong outflows along the equatorial plane that reverse direction close to the surface of the disk and converge on the accretor. In the context of gamma-ray bursts (GRBs), we estimate the energy released from the system in neutrinos and through magnetic-dominated mechanisms and find it can be as high as E-nu approximate to 10(52) ergs and E-BZ approximate to 10(51) ergs, respectively, during an estimated accretion timescale of 0.1-0.2 s. The nu(ν) over bar annihilation is likely to produce bursts from only a short, impulsive energy input Lnu(ν) over bar proportional to t(-5/2) and so would be unable to account for a large fraction of bursts that show complicated light curves. On the other hand, a gas mass approximate to0.1-0.25 M. survives in the orbiting debris, which enables strong magnetic fields approximate to10(16) G to be anchored in the dense matter long enough to power short duration GRBs. We highlight the effects that the initial disk and black holes masses, viscosity, and binary mass ratio have on the evolution of the disk structure. Finally, we investigate the continuous energy injection that arises as the black hole slowly swallows the rest of the disk and discuss its consequences on the GRB afterglow emission MH - United Kingdom MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000178300000028 L2 - accretion, accretion disks;gamma rays : bursts;hydrodynamics;SMOOTHED PARTICLE HYDRODYNAMICS; LOCAL SHEAR INSTABILITY; WEAKLY MAGNETIZED DISKS; TIDALLY LOCKED BINARIES; RUNAWAY INSTABILITY; NEUTRON-STARS; NEWTONIAN HYDRODYNAMICS; FLUID-DYNAMICS; STIFF EQUATION; CENTRAL ENGINE SO - Astrophysical Journal 2002 ;577(2):893-903 5903 UI - 11382 AU - Lefebvre R AU - Atabek O AU - Leon V AD - Univ Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, FranceUniv Paris 06, UFR Phys Fondamentale & Appl, F-75231 Paris, FranceBUAP, Inst Fis, Puebla 72570, MexicoAustralian Natl Univ, Res Sch Phys, Canberra, ACT, AustraliaLefebvre, R, Univ Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, France TI - Occurrence of unit transmissivity in scattering AB - Unit transition probability occurs when a bound state works as a doorway state between two continua. It is shown that in the limit of small coupling this is still true if there is direct coupling between the continua. A cancellation of this coupling occurs in the appropriate element of the transition operator MH - Australia MH - France MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000174978600093 SO - Physical Review A 2002 ;65(4): 5904 UI - 10995 AU - Lefevre T AU - Toscani S AU - Picquart M AU - Dugue J AD - Univ Paris 05, FRE CNRS 2303, UFR Biomed St Peres, Lab Objets Complexes & Interfaces Interet, F-75270 Paris 06, FranceUniv Laval, Ctr Rech Sci & Technol Lait, STELA, Fac Sci Agr & Alimentat, St Foy, PQ G1K 7P4, CanadaUniv Paris 05, Fac Sci Pharmaceut & Biol, Lab Chim Phys & Chim Minerale, F-75270 Paris 06, FrancePicquart, M, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Crystallization of water in multilamellar vesicles AB - The two-step crystallization of water in multilamellar vesicles (MLVs) of phosphatidylcholines has been investigated. The main crystallization occurs near - 15 degreesC and involves bulk water. Contrary to unilamellar vesicles, a sub-zero phase transition is observed for MLVs at -40 degreesC that corresponds to the crystallization of interstitial water. as proved by Fourier transform infrared absorption and differential scanning calorimetry (DSC) experiments. Furthermore, by means of the DSC method and, more specifically, using the enthalpy change values DeltaH(sub) at the sub-zero transition, the number of water molecules per 1,2-dipalmitoylpzhosphatidylcholine (DPPC) molecule giving rise to this transition has been estimated for different H2O/DPPC molar ratios. The curve of the molecular fraction of water molecules involved in the sub-zero transition versus the H2O/DPPC molar ratio exhibits a maximum for H2O/DPPC equal to 27 (40% in mass of water) and tends towards zero for H2O/DPPC ratio values approaching that of the swelling limit of the membrane. A smaller enthalpy value of the sub-zero transition is found for 1-oleoyl-2-palmitoyl-3-phosphatidylcholine (OPPC) than for DPPC. This may be explained by the decrease of interstitial water's quantity when the lipid contains an unsaturated chain. When troxerutin, a hydrophilic drug, is added to the DPPC multilayers, the decrease of DeltaH(sub) and melting enthalpy of bulk water is attributed to a decrease of the entropy of the liquid phase owing to the network of water molecules surrounding troxerutin molecules. In all cases, the experiments revealed that the sub-zero transition occurs only in the presence of excess water with respect to the swelling limit of membranes. This evidence could be, at least qualitatively, related to an increase of membrane pressure on interstitial water subsequent to bulk water crystallization MH - Canada MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Biophysics U5 - J;Article AV - English IS - 0175-7571 UR - ISI:000176088600006 L2 - interstitial water;bulk water;phospholipid multilayers;crystallization;troxerutin;PHOSPHOLIPID-BILAYERS; PHASE-TRANSITION; SYSTEMS; TEMPERATURES; HEADGROUP SO - European Biophysics Journal with Biophysics Letters 2002 ;31(2):126-135 5905 UI - 9635 AU - Lefloch B AU - Cernicharo J AU - Rodriguez LF AU - Miville-Deschenes MA AU - Cesarsky D AU - Heras A AD - Observ Grenoble, Astrophys Lab, F-38041 Grenoble 9, FranceCSIC, Inst Estructura Mat, E-28006 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoEcole Normale Super, Dept Phys, Lab Radioastron, F-75231 Paris, FranceMax Planck Inst Extraterr Phys, D-85741 Garching, GermanyEuropean Space Agcy, ESTEC, SCI SAF, NL-2200 AG Noordwijk, NetherlandsLefloch, B, Observ Grenoble, Astrophys Lab, BP 53, F-38041 Grenoble 9, France TI - The photoionization of a star-forming core in the Trifid Nebula AB - We have carried out a comprehensive multiwavelength study of the bright-rimmed globule TC2 in the Trifid Nebula, using the IRAM 30 m telescope, the VLA centimeter array, and the Infrared Space Observatory (ISO). TC2 is one of the very few globules to exhibit signs of active ongoing star formation while being photoevaporated by the Lyman continuum flux of the exciting star of the nebula (similar to10(10) cm(-2) s(-1)). The globule consists of a cold dense core of mass 27 M-circle dot surrounded by a lower density envelope of molecular gas. The impinging Lyman continuum photons induce the propagation of an ionization front into the globule. The evaporation of the ionized gas forms a thin layer of density n(e)=(1-2)x10(3) cm(-3) around the globule, which could be mapped with the VLA. The globule is illuminated mainly on its rear side, by a far-ultraviolet field of intensity G(0)similar or equal to1000. It creates a photon-dominated region (PDR) below the surface, which was mapped and characterized with the ISOCAM circular variable filter and the Short Wavelength Spectrometer (SWS) on board ISO. The physical conditions derived from the analysis of the far-infrared lines [O I] 63, 145 mum and [C II] 158 mum and the continuum emission are in good agreement with some recent PDR models. The emission of the polycyclic aromatic hydrocarbon band at 6.2, 7.7, 8.6, and 11.3 mum is detected over the whole globule. The relative intensity variations observed across the globule, in the PDR and the photoionized envelope, are consistent with the changes in the ionization fraction. In the head of TC2, we find a second kinematic component, which is the signature of the radiatively driven collapse undergone by the globule. This component indicates that the PDR propagates at low velocity inside the body of TC2. The molecular emission suggests that the star formation process was probably initiated a few times 10(5) years ago, in the large burst that led to the formation of the nebula. The globule has already evaporated half the mass of its envelope. However, the ionization timescale of the globule is long enough (similar to2 Myr) to let the protostellar objects reach smoothly the ultimate stages of protostellar evolution. The impact of photoionization on the star formation process appears limited MH - France MH - Germany MH - Mexico|Michoacan MH - Netherlands MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179681500024 L2 - dust, extinction;HII regions;ISM : globules;ISM : individual (Trifid Nebula);ISM : jets and outflows;stars : formation;POLYCYCLIC AROMATIC-HYDROCARBONS; RADIATION-DRIVEN IMPLOSION; H-II REGIONS; PHOTODISSOCIATION REGIONS; COMETARY GLOBULES; WAVELENGTH SPECTROMETER; INTERSTELLAR CLOUDS; PHYSICAL CONDITIONS; LINE EMISSION; 158 MICRON SO - Astrophysical Journal 2002 ;581(1):335-356 5906 UI - 11615 AU - Lekht EE AU - Silant'ev NA AU - Mendoza-Torres JE AU - Tolmachev AM AD - Inst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Pulkovo Astron Observ, St Petersburg 196140, RussiaRussian Acad Sci, Astrospace Ctr, Lebedev Phys Inst, Pushchino Radio Astron Observ, Pushchino 142292, Moscow Oblast, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Tonantzintla 72840, Puebla, Mexico TI - An analysis of the line shape for H2O maser emission peaks in star-forming regions AB - We analyze the line shape for emission peaks Of H2O maser sources associated with star-forming regions by using the spectra obtained with the RT-22 radio telescope at the Pushchino Radio Astronomy Observatory. For five sources, we found the line profile of emission peaks to be asymmetric. In all cases, the left (high-frequency) line wing is higher than the right wing. Our analysis of the line shape yielded additional information on the structure and evolution of the maser sources under study. In G43.8-0.1, the emission feature was found to split up into two components. To explain the evolution of the 16.8 km s(-1) line in NGC 2071, we propose a model in which the line-of-sight velocity gradient changes under the effect of a (non-shock) wave. The observed short-duration flares of individual emission features in W75N can emerge due to a chance projection of the numerous clumps of matter involved in Keplerian motion onto each other. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000174464300004 L2 - radio sources;star formation;G43.8-0.1 SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2002 ;28(2):89-99 5907 UI - 11820 AU - Lekht EE AU - Mendoza-Torres JE AU - Berulis II AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, Pushchino Radio Astron Observ, Ctr Astro Space, Lebedev Inst Phys, Pushchino 142292, Moscow, RussiaKaunus Univ Technol, LT-3006 Kaunas, LithuaniaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Cyclic activity of the water-vapor maser in S128 AB - The results of observations of the S128 H2O maser carried out from February 1995 to March 2001 on the 22-m radio telescope of the Pushchino Radio Astronomy Observatory are presented. Two activity cycles of the H2O maser with a period of about 10 years were observed during the total monitoring interval (1981-2001). This may be connected either with cyclic activity of the central star in S 128 during its formation or with the influence on the H2O masering region of shocks arising near an ionization front at the interface of two colliding CO clouds. The emission at radial velocities from -73 to -70 km/s consists of four emission features. The emission feature at -71.8 km/s exhibits a flux dependence on linewidth that is typical of an unsaturated maser. (C) 2002 MAIK "Nauka/Interperiodica" MH - Lithuania MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000173818400006 L2 - H2O SO - Astronomy Reports 2002 ;46(1):57-66 5908 UI - 11145 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AD - Denison Univ, Dept Biol, Granville, OH 43023, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USAEscuela Nacl Estudios Profes Iztacala, UBIPRO, Ecol Lab, Los Reyes Iztacala 54090, Estado Mexico, MexicoSmith, GR, Denison Univ, Dept Biol, Granville, OH 43023, USA TI - Body temperature and sexual dimorphism of Sceloporus aeneus and Sceloporus palaciosi from Mexico MH - Mexico|Estado De Mexico MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0173-5373 UR - ISI:000175683300012 L2 - SIZE DIMORPHISM; ELEVATIONAL VARIATION; LIZARDS; MATURITY; JARROVI; GROWTH; FIELD SO - Amphibia-Reptilia 2002 ;23(1):114-119 5909 UI - 9990 AU - Lemos D AU - Garcia-Carreno FL AU - Hernandez P AU - del Toro AN AD - Univ Sao Paulo, Inst Oceanog, BR-05315937 Sao Paulo, BrazilCIBNOR, La Paz 23000, BCS, MexicoLemos, D, Univ Sao Paulo, Inst Oceanog, CP 66149, BR-05315937 Sao Paulo, Brazil TI - Ontogenetic variation in digestive proteinase activity, RNA and DNA content of larval and postlarval white shrimp Litopenaeus schmitti AB - Proteinase (endopeptidase), trypsin and chymotrypsin activities, RNA, and DNA contents were examined throughout the ontogenetic development of cultured Litopenaeus schmitti. Whole individuals from larval and postlarval stages, and adult hepatopancreas were homogenized and assayed for quantification of enzyme activity. Proteinase activity of different life stages was characterized by substrate-SDS-PAGE. Specific inhibitors for trypsin (TLCK) and serine proteinases (PMSF) were used to identify activity zones of these enzymes in gels. Nucleic acids were also quantified in larval and postlarval stages. Protein-specific activity of total proteinases and trypsin presented higher values in nauplius IV (N IV), protozoea I (PZ I), and PZ III, compared to the remaining stages, while chymotrypsin activity peaked in N IV and PZ III. Enzyme activity was lower in egg, early nauplius, mysis, and postlarval stages. Different proteinase patterns were observed in SDS-PAGE during ontogenetic, development. Active bands of 15.5, 16.0, 19.9, 21.8, 24.0, 27.9, 30.3, 33.5, 35.5, 38.2, and 48.1 kDa were detected in the adult hepatopancreas. In the course of development, proteolytic activity was detected in N IV, and intense bands of 17.3, 19.9, and 20.9 kDa were found up to mysis (M III). A band at 38.2 kDa was present between N IV and M I, and between PL II and PL IV. Most bands were serine proteinases, and only two bands in adult (15.5 and 15.9 kDa) were inhibited by TLCK. Both RNA and DNA contents (mug mg(-1) of fresh weight) reduced with development from egg to PZ III, increasing afterwards until PL IV. RNA/DNA ratios increased from egg, reaching a peak in PZ I, and decreased in the following stages until a minimum was reached in M II. A secondary peak was observed in PL III followed by reduction in PL IV. The variation in enzyme activity indicates different strategies of energy use throughout development. Higher enzyme activity combined with increased RNA/DNA in protozoeal stages denotes intense food energy use and accumulation into growth. The shift in energy strategy during the ontogeny of L. schmitti is accompanied by variation in proteinase characteristics as observed in other penaeid species. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000178793800024 L2 - digestion;enzyme activity;metabolic rates;white shrimp;Litopenaeus schmitti;PENAEUS-VANNAMEI CRUSTACEA; FARFANTEPENAEUS-PAULENSIS CRUSTACEA; LOBSTER HOMARUS-AMERICANUS; BIOCHEMICAL-COMPOSITION; JAPONICUS LARVAE; TRYPSIN ACTIVITY; ARTEMIA-NAUPLII; ENZYME-ACTIVITY; ENERGY CONTENT; DECAPODA SO - Aquaculture 2002 ;214(1-4):363-380 5910 UI - 10568 AU - Lemus R AU - Carvajal M AU - Lopez V AU - Frank A AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoLemus, R, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, AP 70-543,Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Spectroscopic description of H2O in the su(2) vibron model approximation AB - The spectroscopic description of the vibrational excitations of the (H2O)-O-16 molecule is presented in the framework of the su(2) vibron model approximation. Both Darling-Dennison and Fermi-like interactions are taken into account in the energy fit, where an rms deviation of 3.05 cm(-1) for 58 experimental levels is obtained. We are able to establish for the first time a direct connection between the spectroscopic parameters and the molecular structure constants in the vibron model. To test the physical content of the potential constants, a comparison is made between the predicted and observed energies for (H2O)-O-18. In addition, an analysis of the transition intensities is presented. (C) 2002 Elsevier Science (USA) MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Physics, Atomic, Molecular & Chemical;Spectroscopy U5 - J;Article AV - English IS - 0022-2852 UR - ISI:000177105100006 L2 - vibron model;H2O;POTENTIAL-ENERGY SURFACE; OVERTONE SPECTRA; ALGEBRAIC MODEL; MOLECULAR VIBRATIONS; POLYATOMIC-MOLECULES; TRIATOMIC-MOLECULES; BENDING VIBRATIONS; MORSE OSCILLATORS; WATER MOLECULE; LOCAL MODES SO - Journal of Molecular Spectroscopy 2002 ;214(1):52-68 5911 UI - 11112 AU - Lennard WN AU - Kim JK AU - Rodriguez-Fernandez L AD - Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, CanadaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoKorea Inst Geosci & Mineral Resources, Yusung Ku, Taejon 305350, South KoreaLennard, WN, Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada TI - Surface sensitive particle-induced X-ray emission AB - A technique for quantitative and non-destructive surface spectroscopy using charged particle X-ray production at grazing exit angles is described. The enhanced surface sensitivity derives from: (i) the effect of refraction which increases the probability for emission near the critical angle, and (ii) self-absorption for those photons emitted at depth and almost parallel to the sample surface, including bremsstrahlung radiation. For near- and on-surface impurities, quantification and depth profiling can be achieved in favourable cases by combining measured yields with the results of theoretical calculations. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - South Korea PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000175595500010 L2 - particle-induced X-ray emission;surface spectroscopy;grazing exit;depth profiling;SPIX; SPECTROSCOPY; RBS SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2002 ;189():49-55 5912 UI - 10562 AU - Leon-Regagnon V AU - Osorio-Sarabia D AU - Garcia-Prieto L AU - Akahane H AU - Lamothe-Argumedo R AU - Koga M AU - Messina-Robles M AU - varez-Guerrero C AD - Univ Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 70153, DF, MexicoFukuoka Univ, Sch Med, Dept Parasitol, Fukuoka 8140180, JapanKyushu Univ, Grad Sch Med Sci, Dept Microbiol Parasitol, Fukuoka 8128582, JapanHosp Gen Tepic, Dept Dermatol, Tepic, Nayarit, MexicoUniv Autonoma Nayarit, Tepic, Nayarit, MexicoLeon-Regagnon, V, Univ Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 70153, DF, Mexico TI - Study of the ethiological agent of gnathostomosis in Nayarit, Mexico AB - In order to clarify the specific identity of the ethiological agent of human gnathostomosis in Nayarit State, Mexico, morphological and molecular studies were conducted on advanced third stage larvae obtained from human and fish tissue. Cathorops fuerthii from Agua Brava lagoons complex, was the only fish species found to be infected among four species surveyed. Morphological variability does not allow specific identification of the larvae. Internal transcribed spacer 2 of the ribosomal DNA was sequenced for six larvae (five from fish, one from human tissue). Low divergence in the sequences of Nayarit larvae and Gnathostoma binucleatum (0.24% or less) indicate that the larvae examined belong to this species. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Nayarit PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 10 U4 - Parasitology U5 - J;Article AV - English IS - 1383-5769 UR - ISI:000177178000008 L2 - Gnathostoma binucleatum;human gnathostomosis;Nayarit;Mexico SO - Parasitology International 2002 ;51(2):201-204 5913 UI - 9561 AU - Leon CA AU - Drew RAL AD - McGill Univ, Dept Min Met & Mat Engn, Montreal, PQ H3A 2B2, CanadaUniv Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoDrew, RAL, McGill Univ, Dept Min Met & Mat Engn, 3610 Univ St, Montreal, PQ H3A 2B2, Canada TI - The influence of nickel coating on the wettability of aluminum on ceramics AB - The wetting behavior and interfacial phenomena of plain and nickel-coated alumina and silicon carbide ceramics with liquid aluminum at 800 degreesC was investigated. The coatings applied to the ceramic plates improved wettability with aluminum resulting from the dissolution of the coating in the liquid drop. The non-wetting condition of the as received ceramics was overcome to contact angles of 12.2degrees for Ni-coated SiC and 11.6degrees for Ni-coated Al2O3. With the addition of nickel as a coating, there was no dissolution of SiC in the alloy, and interfacial carbide did not appear. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Michoacan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Manufacturing;Materials Science, Composites U5 - J;Article AV - English IS - 1359-835X UR - ISI:000179976800026 L2 - wettability;interface/interphase;electron microscopy;surface treatments;KINETICS; COMPOSITES; AL SO - Composites Part A-Applied Science and Manufacturing 2002 ;33(10):1429-1432 5914 UI - 9908 AU - Leon CA AU - Drew RAL AD - Univ Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoMcGill Univ, Dept Min Metal & Mat Engn, Montreal, PQ H3A 2B2, CanadaDrew, RAL, Univ Michoacana, Inst Invest Met, Apdo Postal 888, Morelia 58000, Michoacan, Mexico TI - Small punch testing for assessing the tensile strength of gradient AlNi-SiC composites AB - The versatility of the shear punch test (SPT) was considered as an alternative for assessing the tensile properties of Al/Ni-SiC gradient composites fabricated by infiltration of liquid aluminum into coated ceramics. Tensile strength values of the order of 220 to 250 MPa were obtained. The nature of the shear-fractured surfaces was irregular for the composite specimens, with shear failure over most of the surfaces but with some tensile failure at the margins. The substantial accumulation of NiAl3 in the upper section specimen resulted in a higher strength and brittleness of the matrix compared to the low nickel content matrix sections. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000179001500035 L2 - metal matrix composites;gradient materials;coatings;infiltration;small punch test;tensile strength;shear strength;MATRIX COMPOSITES; ALUMINUM SO - Materials Letters 2002 ;56(5):812-816 5915 UI - 10436 AU - Leon CA AU - Aguilar EA AU - Quintana-Puchol R AU - Drew RAL AD - Univ Michoacana, Inst Invest Met, Morelia 58000, Michoacan, MexicoUniv Cent Villas, Welding Res Ctr, Santa Clara, Villa Clara, CubaMcGill Univ, Dept Min Met & Mat Engn, Montreal, PQ H3A 2B2, CanadaLeon, CA, Univ Michoacana, Inst Invest Met, Apto Postal 888, Morelia 58000, Michoacan, Mexico TI - Determination of metal coating thickness on ceramic substrates MH - Canada MH - Cuba MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000177458200018 SO - Journal of Materials Science Letters 2002 ;21(17):1375-1377 5916 UI - 10634 AU - Leon CA AU - Lopez VH AU - Bedolla E AU - Drew RAL AD - Univ Michoacana San Nicolas Hidalgo, Inst Invest Met, Morelia 58000, Michoacan, MexicoMcGill Univ, Dept Min & Met Engn, Montreal, PQ H3A 2B2, CanadaLeon, CA, Univ Michoacana San Nicolas Hidalgo, Inst Invest Met, POB 52-B, Morelia 58000, Michoacan, Mexico TI - Wettability of TiC by commercial aluminum alloys AB - The effect of alloying elements on the wettability of TiC by commercial aluminum alloys (1010, 2024, 6061 and 7075) was investigated at 900degreesC using a sessile drop technique. Wetting increased in the order 6061 < 7075 < 2024 < 1010 for both, static argon or vacuum atmospheres. Alloys 1010 and 2024 wet TiC under both atmospheres, leading to contact angles in the order of 60degrees and less, while 7075 only wets under vacuum, with the poorest wettability being exhibited by 6061. Evaporation of Zn and Mg under vacuum conditions contributed to the rupture of the oxide film covering the aluminum drop and thereby improving wetting and spreading. Continuous and isolate Al4C3 was detected in all the cases. CuAl2 precipitation at the interface slightly decreased Al4C3 formation and increased the adhesion of 2024 to TiC. (C) 2002 Kluwer Academic Publishers MH - Canada MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 17 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000177008600022 L2 - METAL-MATRIX COMPOSITES; MOLTEN ALUMINUM; INFILTRATION; INTERFACE; SYSTEM SO - Journal of Materials Science 2002 ;37(16):3509-3514 5917 UI - 9834 AU - Leonard JA AU - Wayne RK AU - Wheeler J AU - Valadez R AU - Guillen S AU - Vila C AD - Univ Calif Los Angeles, Dept Organism Biol Ecol & Evolut, Los Angeles, CA 90095, USACONOPA, Coordinadora Invest & Desarrollo Camelidos, Lima 19, PeruUniv Nacl Autonoma Mexico, Inst Invest Antropol, Lab Paleozool, Mexico City 04510, DF, MexicoBioanthropol Fdn Peru, Ctr Mallqui, Lima 11, PeruUppsala Univ, Dept Evolutionary Biol, S-75236 Uppsala, SwedenLeonard, JA, Smithsonian Inst, Natl Museum Nat Hist, Dept Systemat Biol, Genet Program, 3001 Connecticut Ave NW, Washington, DC 20008 USA TI - Ancient DNA evidence for Old World origin of New World dogs AB - Mitochondrial DNA sequences isolated from ancient dog remains from Latin America and Alaska showed that native American dogs originated from multiple Old World lineages of dogs that accompanied late Pleistocene humans across the Bering Strait. One clade of dog sequences was unique to the New World, which is consistent with a period of geographic isolation. This unique clade was absent from a large sample of modern dogs, which implies that European colonists systematically discouraged the breeding of native American dogs MH - USA MH - Mexico|Distrito Federal MH - Peru MH - Sweden PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 59 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000179361600047 L2 - DOMESTIC DOG; CANIS-LUPUS; EVOLUTION; WOLF SO - Science 2002 ;298(5598):1613-1616 5918 UI - 10332 AU - Leppanen T AU - Karttunen M AU - Kaski K AU - Barrio RA AU - Zhang LM AD - Helsinki Univ Technol, Res Ctr Computat Sci & Engn, FIN-02015 Espoo, FinlandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Autonomous Univ Mexico, Fac Med, Dept Fisiol Celular, Mexico City 04510, DF, MexicoKaski, K, Helsinki Univ Technol, Res Ctr Computat Sci & Engn, POB 9203, FIN-02015 Espoo, Finland TI - A new dimension to Turing patterns AB - It is well known that simple reaction-diffusion systems can display very rich pattern formation behaviour. Here we have studied two examples of such systems in three dimensions. First we investigate the morphology and stability of a generic Turing system in three dimensions and then the well-known Gray-Scott model. In the latter case, we added a small number of morphogen sources in the system in order to study its robustness and the formation of connections between the sources. Our results raise the question of whether Turing patterning can produce an inductive signalling mechanism for neuronal growth. (C) 2002 Elsevier Science B.V. All rights reserved MH - Finland MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000177751200005 L2 - pattern formation;reaction-diffusion system;mathematical biology;SYSTEMS SO - Physica D 2002 ;168():35-44 5919 UI - 9845 AU - Lerma S AU - Jesgarz S AU - Hess PO AU - Civitarese O AU - Reboiro M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaLerma, S, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Schematic model for QCD at finite temperature AB - The simplest version of a class of toy models for QCD is presented. It is a Lipkin-type model, for the quark-antiquark sector, and, for the gluon sector, gluon pairs with spin zero are treated as elementary bosons. The model restricts to mesons with spin zero and to few baryonic states. The corresponding energy spectrum is discussed. We show that ground state correlations are essential to describe physical properties of the spectrum at low energies. Quantum phase transitions are described in an effective manner, by using coherent states. The appearance of a Goldstone boson for large values of the interaction strength is discussed, as related to a collective state. The formalism is extended to consider finite temperatures. The partition function is calculated, in an approximate way, showing the convenience of the use of coherent states. The energy density, heat capacity, and transitions from the hadronic phase to the quark-gluon plasma are calculated MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000179103500070 L2 - RELATIVISTIC QUARK-MODEL; STRANGE-BARYON SPECTRUM; DOUBLE-BETA DECAY; LIPKIN MODEL; FORCES; STATES SO - Physical Review C 2002 ;66(4): 5920 UI - 11496 AU - Leskova TA AU - Maradudin AA AU - Mendez ER AD - Russian Acad Sci, Inst Spect, Troitsk 142092, RussiaUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USACtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoLeskova, TA, Russian Acad Sci, Inst Spect, Troitsk 142092, Russia TI - Multiple-scattering phenomena in the second-harmonic generation of light reflected from and transmitted through randomly rough metal surfaces AB - Theories of multiple-scattering effects in the second-harmonic generation of light reflected from clean randomly rough metal surfaces and reflected from and transmitted through randomly rough metal surfaces in Kretschmann attenuated total reflection geometry are outlined. Both weakly rough and strongly rough surfaces are considered, the former by perturbative approaches, the latter by numerical simulations. Comparisons of theoretical results with experimental data for second-harmonic generation on clean random metal surfaces are presented MH - Mexico|Baja California MH - Russia MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - S;Review AV - English IS - 0303-4216 UR - ISI:000174624800016 L2 - OPTICAL 2ND-HARMONIC GENERATION; BACKSCATTERING ENHANCEMENT; COHERENT BACKSCATTERING; LOCALIZATION; PLASMONS; POLARIZATION; BOUNDARY; FILMS SO - Optical Properties of Nanostructured Random Media 2002 ;82():359-442 5921 UI - 9894 AU - Leskow J AU - Napolitano A AD - Univ Naples Federico II, Dipartimento Ingn Elettron & Telecommun, I-80125 Naples, ItalyWyzsza Szkola Biznesu, Zaklad Ekonmetrii, Nowy Sacz, PolandCtr Invest Matemat, Guanajuato, MexicoNapolitano, A, Univ Naples Federico II, Dipartimento Ingn Elettron & Telecommun, Via Claudio 21, I-80125 Naples, Italy TI - Quantile prediction for time series in the fraction-of-time probability framework AB - The aim of this work is to introduce the concept of the quantile and propose its prediction algorithms using the fraction-of-time probability approach. In such an approach, unlike the classical one based on stochastic processes, statistical functions and probability concepts are defined starting from a single observed time series instead of an ensemble of realizations of a stochastic process. Two prediction algorithms based on a single observed time series and without any distributional assumption are proposed. The former is devoted to deal with statistics not depending on time (stationary case) whereas the latter considers statistics that depend on time (nonstationary case). Convergence and estimation accuracy issues are considered in the paper without checking the usual mixing assumptions, used in the classical stochastic approach. Moreover, applications to the design of constant false-alarm rate radar processors and the analysis of real financial data are presented. (C) 2002 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Guanajuato MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0165-1684 UR - ISI:000178707700021 L2 - quantile prediction;fraction-of-time probability;CFAR processors;CUMULANT THEORY SO - Signal Processing 2002 ;82(11):1727-1741 5922 UI - 8987 AU - Levachkine S AU - Velazquez A AU - Alexandrov V AU - Kharinov M AD - IPN, Ctr Comp Res, UPALM Zacateonco, Edificio CIC, Mexico City 07738, DF, MexicoRussian Acad Sci, Inst Informat & Automat, St Petersburg 199178, RussiaLevachkine, S, IPN, Ctr Comp Res, UPALM Zacateonco, Edificio CIC, Cubo 2019 Ala Sur, Mexico City 07738, DF, Mexico TI - Semantic analysis and recognition of raster-scanned color cartographic images AB - Semantic analysis of cartographic images is interpreted as a separate representation of cartographic patterns (alphanumeric, punctual, linear, and area). We present an approach to map interpretation exploring the idea of synthesis of invariant graphic images at low level processing (vectorization and segmentation). This means that we ran "vectorization-recognition" and "segmentation-interpretation" systems simultaneously. Although these systems can generate some errors in interpretation, they are much more useful, for the following understanding algorithms because its output is nearly recognized objects of interest MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000181394100015 L2 - SEGMENTATION SO - Graphics Recognition: Algorithms and Applications 2002 ;2390():178-189 5923 UI - 9929 AU - Levitt L AU - Becker S AU - Boland J AU - Rodriguez I AU - Dossenbach M AU - Schawoush M AU - Granim M AD - Eli Lily Australia Pty Ltd, W Ryde, AustraliaEli Lilly Mexico, SA CV, Mexico City, DF, MexicoEli Lilly Ges MBH, Vienna, AustriaJeddah Psychiat Hosp, Jeddah, Saudi ArabiaAin Shams Univ, Dept Psychiat, Cairo, Egypt TI - Baseline results of patients initiating treatment with olanzapine or risperidone in the 3-year intercontinental schizophrenia outpatient health outcomes (IC-SOHO) study MH - Australia MH - Austria MH - Egypt MH - Mexico|Distrito Federal MH - Saudi Arabia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0924-977X UR - ISI:000178905000500 SO - European Neuropsychopharmacology 2002 ;12():S327-S327 5924 UI - 9533 AU - Lewis EA AU - Bills GF AU - Heredia G AU - Reyes M AU - Arias RM AU - White JF AD - Rutgers State Univ, Cook Coll, Dept Plant Biol & Pathol, New Brunswick, NJ 08901, USAMerck Sharp & Dohme Espana, Ctr Invest Basica, E-28027 Madrid, SpainInst Ecol AC, Xalapa 91000, Veracruz, MexicoLewis, EA, Rutgers State Univ, Cook Coll, Dept Plant Biol & Pathol, New Brunswick, NJ 08901 USA TI - A new species of endophytic Balansia from Veracruz, Mexico AB - A new graminicolous species of Clavicipitaceae, Balansia brunnans sp. nov., has been found to infect Panicum xalapense. Staining of living host tissues indicates the presence of intercellular endophytic mycelium. Stromata develop just below the nodes on the culms. Balansia. brunnans is comparable to Balansia arislidae, B. discoidea, B. gaduae, B. nigricans, and B. strangulans in development of stromata on culms and possession of an endophytic mycelial stage. Among the differences between Balansia brunnans and other comparable species is that it possesses a brown perithecial stroma, whereas comparable species have black perithecial stromata. A key is provided to distinguish B. brunnans from similar species MH - Mexico|Veracruz MH - USA MH - Spain PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000179862700015 L2 - Clavicipitaceae;endophyte;grass;stromata;systematics;HOST ASSOCIATIONS; GRASSES; EPICHLOE; TYPHINA SO - Mycologia 2002 ;94(6):1066-1070 5925 UI - 11358 AU - Ley-Koo E AU - Villa-Torres G AU - Kouznetsov D AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Arizona, Tucson, AZ 85721, USALey-Koo, E, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Aharonov-Bohm effect on Landau states in annular cylindrical boxes AB - The Schrodinger equation for an electron inside an annular cylindrical box and in the presence of an axial uniform magnetic field is solved in two comparative situations: i) when the magnetic induction (B) over right arrow (0) = (k) over capB(0) is the same in the central perforation and in the box, and ii) when its values in the perforation (B) over right arrow (i) = (k) over capB(i) and in the box (B) over right arrow (0) = (k) over capB(0)) are different. The Aharonov-Bohm effect on the Landau states of the confined electron is exhibited through the analysis of the dependence of the energy eigenvalues and eigenfunctions on the difference of the magnetic flux in the perforation as B-i - B-0 changes MH - Mexico|Distrito Federal MH - USA PB - TAIPEI: PHYSICAL SOC REPUBLIC CHINA RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0577-9073 UR - ISI:000175102300004 SO - Chinese Journal of Physics 2002 ;40(2):130-141 5926 UI - 10783 AU - Leyva-Guerrero E AU - Platz MS AU - Poole J AD - Univ Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, MexicoOhio State Univ, Dept Chem, Columbus, OH 43210, USA TI - Laser flash photolysis and complexation studies of Tirapazamine MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296701487 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():U269-U269 5927 UI - 10939 AU - Leyvraz F AU - Firpo MC AU - Ruffo S AD - Univ Florence, Dipartimento Energet Sergio Stecco, I-50139 Florence, ItalyINFM, Florence, ItalyIst Nazl Fis Nucl, I-50125 Florence, ItalyUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoMIT, Cambridge, MA 02139, USALeyvraz, F, Univ Florence, Dipartimento Energet Sergio Stecco, Via Santa Marta 3, I-50139 Florence, Italy TI - Inhomogeneous quasi-stationary states in a mean-field model with repulsive cosine interactions AB - The system of N particles moving on a circle and interacting via a global repulsive cosine interaction is well known to display spatially inhomogeneous structures of extraordinary stability starting from certain low-energy initial conditions. The aim of this paper is to show in a detailed manner how these structures arise and to explain their stability. By a convenient canonical transformation we rewrite the Hamiltonian in such a way that fast and slow variables are singled out and the canonical coordinates of a collective mode are naturally introduced. If, initially, enough energy is put in this mode, its decay can be extremely slow. However, both analytical arguments and numerical simulations suggest that these structures eventually decay to the spatially uniform equilibrium state, although this can happen on impressively long time scales. Finally, we heuristically introduce a one-particle time-dependent Hamiltonian that well reproduces most of the observed phenomenology MH - Italy MH - Mexico|Morelos MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176165900004 L2 - SYSTEMS; STABILITY; DYNAMICS; CHAOS SO - Journal of Physics A-Mathematical and General 2002 ;35(20):4413-4427 5928 UI - 10974 AU - Leyvraz F AU - Ruffo S AD - Univ Florence, Dipartimento Energet S Stecco, I-50139 Florence, ItalyINFM, Florence, ItalyIst Nazl Fis Nucl, I-50125 Florence, ItalyCtr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoLeyvraz, F, Univ Florence, Dipartimento Energet S Stecco, Via S Marta 3, I-50139 Florence, Italy TI - Ensemble inequivalence in systems with long-range interactions AB - Ensemble inequivalence has been observed in several systems. In particular it has been recently shown that negative specific heat can arise in the microcanonical ensemble in the thermodynamic limit for systems with long-range interactions. We display a connection between such behaviour and a mean-field like structure of the partition function. Since short-range models cannot display this kind of behaviour, this strongly suggests that such systems are necessarily non-mean field in the sense indicated here. We illustrate our results showing an application to the Blume-Emery-Griffiths model. We further show that a broad class of systems with non-integrable interactions are indeed of mean-field type in the sense specified, so that they are expected to display ensemble inequivalence as well as the peculiar behaviour described above in the microcanonical ensemble MH - Italy MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176075300010 L2 - MODEL SO - Journal of Physics A-Mathematical and General 2002 ;35(2):285-294 5929 UI - 11703 AU - Leyvraz F AU - Redner S AD - Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoBoston Univ, Ctr Biodynam, Boston, MA 02215, USABoston Univ, Ctr Polymer Studies, Boston, MA 02215, USABoston Univ, Dept Phys, Boston, MA 02215, USALeyvraz, F, Ctr Ciencias Fis, Ave Univ S-N Colonia Chamilpa, Cuernavaca, Morelos, Mexico TI - Scaling theory for migration-driven aggregate growth AB - We give a comprehensive description for the irreversible growth of aggregates by migration from small to large aggregates, For a homogeneous rate K(i; j) at which monomers migrate from aggregates of size i to those of size j, that is, K(ai; aj) similar to a(lambda)K(i;j) the mean aggregate size grows with time as t(1/(2 -lambda)) for lambda < 2. The aggregate size distribution exhibits distinct regimes of behavior that are controlled by the scaling properties of the migration rate from the smallest to the largest aggregates. Our theory applies to diverse phenomena such as the distribution of city population,, late stage coarsening of nonsymmetric binary systems, and models for wealth exchange MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000173849300069 L2 - KINETICS SO - Physical Review Letters 2002 ;88(6): 5930 UI - 10160 AU - Leznov AN AD - Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, MexicoInst High Energy Phys, Protvino 142280, Moscow Region, RussiaJoint Inst Nucl Res Dubna, Bogoliubov Lab Theoret Phys, Dubna, Moscow Region, RussiaLeznov, AN, Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, Mexico TI - Some integrable models in quantized spaces AB - It is shown that in a quantized space determined by the B-2 (O(5) = Sp(4)) algebra with three-dimensional parameters of the length L-2, momentum (MC)(2), and action S, the spectrum of the Coulomb problem with conserving Runge-Lenz vector coincides with the spectrum found by Schrodinger for the space of constant curvature but with the values of the principal quantum number limited from the side of higher values. The same problem is solved for the spectrum of a harmonic oscillator. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000178340100004 L2 - ALGEBRA SO - Nuclear Physics B 2002 ;640(3):469-480 5931 UI - 10323 AU - Leznov AN AD - Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, MexicoInst High Energy Phys, Protvino, Moscow Oblast, RussiaJoint Inst Nucl Res, Dubna, Moscow Oblast, RussiaLeznov, AN, Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, Mexico TI - Discrete symmetries of the n-wave problem AB - We show that discrete symmetries T of multicomponent integrable systems have a fine structure and can be represented as products of positive integer powers of pairwise commuting basis discrete transformations T-i. The calculations are completed for the n-wave problem MH - Mexico|Morelos MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0040-5779 UR - ISI:000177713500004 L2 - integrable mappings and chains;discrete transformations;Darboux transformation;higher-dimensional integrable systems SO - Theoretical and Mathematical Physics 2002 ;132(1):955-969 5932 UI - 9829 AU - Li ZP AU - Michel E AU - Machado LF AU - Alvarez M AU - Hernandez MM AU - Chevreton M AU - Zhou AY AU - Barban C AU - Dolez N AU - Belmonte JA AU - Fernandez A AU - Fremy J AU - Pau S AU - Servan B AU - Hernandez FP AU - Jiang SY AU - Liu ZL AU - Ringot O AU - Suarez JC AU - Xu Y AD - Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R ChinaObserv Paris, LESIA, FRE 2461, F-92195 Meudon, FranceInst Astrofis Canarias, Tenerife 38200, SpainUNAM, Astron Inst, Ensenada, Baja California, MexicoCNRS, Observ Midi Pyrenees, UMR, F-31400 Toulouse, FranceObserv Paris, GEPI, FRE2459, F-92195 Meudon, FranceNatl Solar Observ, Tucson, AZ 85719, USAUniv La Laguna, Dept Astrofis, Tenerife, SpainLi, ZP, Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China TI - New delta Scuti variable in the Pleiades: HD 23628 AB - We report here the discovery of very low amplitude oscillations in the Pleiades star HD 23628. The 14-nights high quality light curve designates HD 23628 as a new member of the delta Scuti stars class. Amplitude spectra indicate a multi-periodic pulsation behaviour, and four pulsation frequencies have been detected so far. The frequency distribution suggests the presence of nonradial modes. Pulsation constant values of the four modes are distributed in the range corresponding to fundamental f to p(4) radial modes MH - France MH - Mexico|Baja California MH - Peoples R China MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000179291200015 L2 - stars : oscillations;stars : individual : HD 23628;stars : variables : delta Sct;OPEN CLUSTERS; PRAESEPE CLUSTER; BETA PHOTOMETRY; STARS; CAMPAIGN; CALIBRATIONS; CANCRI SO - Astronomy & Astrophysics 2002 ;395(3):873-876 5933 UI - 10107 AU - Liao XF AU - Chen GR AU - Sanchez EN AD - Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R ChinaCINVESTAV, Unidad Guadalajara, Guadalajara 45090, Jalisco, MexicoLiao, XF, Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R China TI - Delay-dependent exponential stability analysis of delayed neural networks: an LMI approach AB - For neural networks with constant or time-varying delays, the problems of determining the exponential stability and estimating the exponential convergence rate are studied in this paper. An approach combining the Lyapunov-Krasovskii functionals with the linear matrix inequality is taken to investigate the problems, which provide bounds on the interconnection matrix and the activation functions, so as to guarantee the systems' exponential stability. Some criteria for the exponentially stability, which give information on the delay-dependence property, are derived. The results obtained in this paper provide one more set of easily verified guidelines for determining the exponentially stability of delayed neural networks, which are less conservative and less restrictive than the ones reported so far in the literature. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Jalisco MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 116 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0893-6080 UR - ISI:000178497800004 L2 - neural network;time delay;exponential stability;linear matrix inequality;exponential convergence;convergence rate;Lyapunov-Krasovskii functional;BIDIRECTIONAL ASSOCIATIVE MEMORY; TIME-DELAY; QUALITATIVE-ANALYSIS; ABSOLUTE STABILITY; OSCILLATION; DYNAMICS SO - Neural Networks 2002 ;15(7):855-866 5934 UI - 10642 AU - Liao XF AU - Chen GR AU - Sanchez EN AD - Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R ChinaCINVESTAV, Unidad Guadalajara, Guadalajara 45090, Jalisco, MexicoLiao, XF, Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R China TI - LMI-Based approach for asymptotically stability analysis of delayed neural networks AB - This paper derives some sufficient conditions for asymptotic stability of neural networks with constant or time-varying delays. The Lyapunov-Krasovskii stability theory for functional differential equations and the linear matrix inequality (LMI) approach are employed to investigate the problem. It shows how some well-known results can be refined and generalized in a straightforward manner. For the case of constant time delays, the stability criteria are delay-independent; for the case of time-varying delays, the stability criteria are delay-dependent. The results obtained in this paper are less conservative than the ones reported so far in the literature and provides one more set of criteria for determining the stability of delayed neural networks MH - Mexico|Jalisco MH - Peoples R China PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 134 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1057-7122 UR - ISI:000177017500018 L2 - GLOBAL STABILITY; TIME-DELAY; QUALITATIVE-ANALYSIS; ABSOLUTE STABILITY; ASSOCIATIVE MEMORY; DYNAMICS; MODEL SO - Ieee Transactions on Circuits and Systems I-Fundamental Theory and Applications 2002 ;49(7):1033-1039 5935 UI - 10473 AU - Lidsey JE AU - Matos T AU - Urena-Lopez LA AD - Univ London, Astron Unit, Sch Math Sci, London E1 4NS, EnglandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoLidsey, JE, Univ London, Astron Unit, Sch Math Sci, Mile End Rd, London E1 4NS, England TI - Inflaton field as self-interacting dark matter in the braneworld scenario AB - A unified model is developed within the context of the braneworld paradigm, where a single scalar field can act as both the inflaton field in the very early universe and also as strong, self-interacting dark matter in the post-inflationary universe. Reheating proceeds due to the overproduction and subsequent evaporation of primordial black holes. Observational constraints, most notably from gravitational waves, are satisfied if the probability of PBH formation is sufficiently high MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177285600024 L2 - PRIMORDIAL BLACK-HOLES; QUINTESSENTIAL INFLATION; COSMOLOGICAL CONSTANT; EXTRA DIMENSION; SCALAR FIELDS; OBSERVATIONAL EVIDENCE; CHAOTIC INFLATION; PARTICLE CREATION; RELIC GRAVITONS; DWARF GALAXIES SO - Physical Review D 2002 ;66(2): 5936 UI - 10161 AU - Lim AJ AU - Raga AC AU - Rawlings JMC AU - Williams DA AD - Univ Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04512, DF, MexicoLim, AJ, Univ Coll London, Dept Phys & Astron, Gower St, London WC1E 6BT, England TI - The acceleration of molecular hydrogen to high velocities in time-dependent fast J-shocks AB - It is a well known but puzzling result that zones within star formation regions sometimes show molecular hydrogen emission at very high (similar to100 km s(-1)) velocities. These kinds of observations are somewhat difficult to explain because non-magnetized, J-type shock waves of velocities above similar to20 km s(-1) mostly dissociate the molecules present in the preshock medium, and therefore produce almost no H-2 emission. We quantify this result by presenting models of steady shock waves moving into a molecular environment, which show that the H-2 molecules are indeed dissociated in the immediate postshock region for higher shock velocities. We argue that the total destruction of molecules by high-velocity shocks is a direct result of the assumption of an instantaneous 'turning on' of the flow that is generally done in computing shock models. We present models in which a shock wave gradually accelerates over a period of similar to1000 yr as would be expected, for example, from the 'turning on' of an outflow from a young star. We find that such shock waves are indeed able to accelerate significant masses of molecular material to velocities of similar to100 km s(-1), and are a plausible explanation for widely observed high-velocity H-2 emission MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000178283100033 L2 - stars : formation;stars : winds, outflows;ISM : jets and outflows;ISM : kinematics and dynamics;ISM : lines and bands;ISM : molecules;INTER-STELLAR SHOCKS; INFRARED-EMISSION; DISSOCIATION; OUTFLOWS; JETS SO - Monthly Notices of the Royal Astronomical Society 2002 ;335(3):817-824 5937 UI - 8900 AU - Lim SJ AU - Gutierrez-Puente Y AU - Tari AM AD - Univ Texas, MD Anderson Canc Ctr, Drug Carriers Unit 422, Houston, TX 77030, USAUniv Texas, MD Anderson Canc Ctr, Dept Bioimmunotherapy, Sect Immunobiol & Drug Carriers, Houston, TX 77030, USAUniv Autonoma Nuevo Leon, Dept Inmunol & Microbiol, Fac Ciencias Biol, Monterrey, MexicoTari, AM, Univ Texas, MD Anderson Canc Ctr, Dept Bioimmunotherapy, Immunobiol Sect, 1515 Holcombe Blvd, Houston, TX 77030 USA TI - N-(4-hydroxyphenyl)-retinamide selectively increases all-trans retinoic acid inhibitory effects in HER2/neu-overexpressing breast cancer cells AB - We previously reported that overexpression of the HER2/ neu oncogene induces all-trans retinoic acid (ATRA) resistance in breast cancer cells. N-(4-hydroxyphenyl)-retinamide (4HPR), a synthetic analogue of ATRA, has been shown to repress the expression of HER2/neu and its family member, epidermal growth factor receptor (EGFR). We investigated whether 4HPR, by suppressing HER2/neu or EGFR expression, could sensitize breast cancer cells to ATRA. At 1.3 muM concentration (a clinically pharmacologically achievable dose), 4HPR increased ATRA sensitivity synergistically in HER2/neu-overexpressing BT-474, MDA-MB-453, and MCF-7/Her2 breast cancer cells. However, 4HPR did not sensitize EGFR-overexpressing MDA-MB-468, Hs578T, and MCF-7/EGFR breast cancer cells to ATRA. The increased inhibitory effects in HER2/neu-overexpressing cells were not correlated with increases in expression levels of p21(WAF1)/(CIP1) or retinoblastoma protein. Combining 4HPR with ATRA may lead to a novel, selective therapeutic or chemopreventive strategy against HER2/neu-overexpressing breast tumors. Copyright (C) 2002 S. Karger AG, Basel MH - Mexico|Nuevo Leon MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 3 U4 - Oncology U5 - J;Article AV - English IS - 1010-4283 UR - ISI:000181635000002 L2 - all-trans-retinoic acid;breast cancer;fenretinide;HER2/neu 4HPR;N-(4-hydroxyphenyl)-retinamide;GROWTH-INHIBITION; GENE-EXPRESSION; N-(4-HYDROXYPHENYL)RETINAMIDE; FENRETINIDE; CARCINOMA; APOPTOSIS; LINES; PHARMACOKINETICS; DIFFERENTIATION; PROLIFERATION SO - Tumor Biology 2002 ;23(5):279-286 5938 UI - 12189 AU - Limon-Ortega A AU - Sayre KD AU - Drijber RA AU - Francis CA AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Nebraska, Lincoln, NE 68583, USASayre, KD, CIMMYT, POB 6-641, Mexico City 06600, DF, Mexico TI - Soil attributes in a furrow-irrigated bed planting system in northwest Mexico AB - In the Yaqui valley, northwest Mexico, wheat (Triticum aestivum L.) is grown as a winter crop followed by maize (Zea mays L.) as a summer crop both planted on beds. Straw of both crops is usually burned to facilitate seedbed preparation for the succeeding crop. Soil physical and biological attributes were determined from 1996 to 2000 from a study initiated in 1992 at the CIANO (Centro de Investigaciones Agr colas del Noroeste) experiment station. The objective was to compare five treatments: (1) conventional tilled bed (CTB)-straw incorporated, and permanent bed (PB) with (2) straw removed, (3) straw partly removed, (4) straw retained, and (5) straw burned - on soil strength, soil structure, and soil microbial biomass carbon (SMB). Seven N treatments were applied to wheat, but for the purpose of this study we chose a subset of three N treatments (0, 150 and 300 kg N ha(-1)) for measurements. Maize received a uniform application of 150 kg N ha(-1) each year. Soil strength decreased as the amount of crop residues applied for each tillage-straw treatment increased. Permanent beds-straw burned treatment had the highest soil strength and CTB-straw incorporated the lowest. The largest soil aggregate fractionation, evaluated with a fractal dimension parameter (D), corresponded to PB-straw burned treatment and the lowest to PB-straw retained treatment. SMB was greater at 0-7 cm than at 7-15 cm depth. As the amount of crop residues increased in each tillage PB-straw treatment, the SMB generally increased. The largest amount of SMB occurred most often on either CTB-straw incorporated or PB-straw retained and the lowest in PB-straw burned treatment. The practice of retaining crop residues as stubble should be adopted in the Yaqui valley since changes resulting from burning crop residues showed the tendency to decrease productivity and soil quality as shown by increased soil strength and soil fractionation, and reduced SMB. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Soil Science U5 - J;Article AV - English IS - 0167-1987 UR - ISI:000172724500003 L2 - wheat;maize;bed-planting;furrow-irrigation;MICROBIAL BIOMASS; WHEAT; FRAGMENTATION; STRAW SO - Soil & Tillage Research 2002 ;63(3-4):123-132 5939 UI - 10753 AU - Lin XB AU - Vivancos IB AD - N Carolina State Univ, Dept Math, Raleigh, NC 27695, USAUniv Nacl Autonoma Mexico, IIMAS, Dept Matemat & Mecan, Mexico City 01000, DF, MexicoLin, XB, N Carolina State Univ, Dept Math, Box 8205, Raleigh, NC 27695 USA TI - Heteroclinic and periodic cycles in a perturbed convection model AB - Vivancos and Minzoni (New Choatic behaviour in a singularly perturbed model, preprint) proposed a singularly perturbed rotating convection system to model the Earth's dynamo process. Numerical simulation shows that the perturbed system is rich in chaotic and periodic solutions. In this paper, we show that if the perturbation is sufficiently small, the system can only have simple heteroclinic solutions and two types of periodic solutions near the simple heteroclinic solutions. One looks like a figure "Delta" and the other looks like a figure "Eight". Due to the fast - slow characteristic of the system, the reduced slow system has a relay nonlinearity ("Asymptotic Method in Singularly Perturbed Systems," Consultants Bureau, New York and London, 1994) - solutions to the slow system are continuous but their derivative changes abruptly at certain junction surfaces. We develop new types of Melnikov integral and Lyapunov-Schmidt reduction methods which are suitable to study heteroclinic and periodic solutions for systems with relay nonlinearity. (C) 2002 Elsevier Science (USA) MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0022-0396 UR - ISI:000176770000009 L2 - singular perturbations;heteroclinic bifurcations;relay non-linearity;Melnikov's method;dynamo process;symmetry;SYMMETRY; SYSTEMS; DYNAMO SO - Journal of Differential Equations 2002 ;182(1):219-265 5940 UI - 9830 AU - Linan-Cabello MA AU - Paniagua-Michel J AU - Hopkins PM AD - Ctr Invest Cient & Educ Super Ensenada, Dept Marine Biotechnol, Ensenada, Baja California, MexicoUniv Oklahoma, Dept Zool, Norman, OK 73019, USAPaniagua-Michel, J, CICESE Marine Biotechnol, POB 43-4844, San Diego, CA 92143 USA TI - Bioactive roles of carotenoids and retinoids in crustaceans AB - Among the proposed functions of carotenoids in aquaculture have been those of pigmentation, antioxidant functions, as a source of pro-vitamin A, cellular protection from photodynamic damage, enhancement of growth and reproductive potential. However results reported by various authors are often contradictory. Some evidence suggests that these pigments may perform vital roles in growth and reproductive success in Crustaceans. Additional efforts need to be devoted to the understanding of the active forms of the carotenoid derived metabolites, retinoids in crustaceans. Dietary carotenoids are the sole biological precursors of retinoids in crustaceans. The importance of carotenoids as bioactive molecules reside to a large degree on their conversion to retinoids that are involved in the activation of hormonal nuclear receptors. Retinoids play a prominent role in many developmental processes, including embryonic development and differentiation of various cell types. The presence of receptors of retinoic acid in crustaceans and our findings of retinoids in the neuroendocrine complex and in reproductive tissue, as well as the enhancement of the ovarian development in shrimp suggests an important role of these metabolites in shrimp physiology for their successful aquaculture MH - USA MH - Mexico|Baja California PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Fisheries U5 - J;Article AV - English IS - 1353-5773 UR - ISI:000179238500008 L2 - bioactivity;cartenoids;crustaceans;reproduction;retinoids;shrimp;PRAWN PENAEUS-JAPONICUS; LARVAL JAPANESE FLOUNDER; RECEPTOR MESSENGER-RNA; HOMARUS-GAMMARUS LINNE; VITAMIN-A; UCA PUGILATOR; DIETARY ASTAXANTHIN; BETA-CAROTENE; FIDDLER-CRAB; X-RECEPTOR SO - Aquaculture Nutrition 2002 ;8(4):299-309 5941 UI - 11463 AU - Lind OT AU - valos-Lind LO AD - Baylor Univ, Dept Biol, Limnol Lab, Waco, TX 76798, USAUniv Autonoma Guadalajara, Chapala Ecol Stn, Guadalajara, Jalisco, MexicoLind, OT, Baylor Univ, Dept Biol, Limnol Lab, Waco, TX 76798, USA TI - Interaction of water quantity with water quality: the Lake Chapala example AB - Water quality may be significantly determined by water quantity. Lake Chapala, Mexico is a large lake beset with numerous water quality problems. The decline in water volume over the past 20 years, a serious problem itself, is associated with causing or enhancing several problems of quality. Five such problems are explored herein. These are: extensive infestations of water hyacinth (Eichhornia crassipes), a declining native fishery, light limitation of phytoplankton production at the base of the food chain, shallow-water algal blooms resulting in water supply treatment problems, and the presence of toxic metals in the harvested and sold fishes MH - Mexico|Jalisco MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000174759600014 L2 - water quality;water quantity;pollution;turbidity;Eichhornia;phytoplankton;CLAY TURBIDITY; TROPICAL LAKE; PHYTOPLANKTON; METALS; MEXICO SO - Hydrobiologia 2002 ;467(1-3):159-167 5942 UI - 9951 AU - Lindig-Cisneros R AU - Zedler JB AD - Univ Wisconsin, Arboretum, Madison, WI 53706, USAUniv Wisconsin, Dept Bot, Madison, WI 53706, USAZedler, JB, Univ Michoacana San Nicolas de Hidalgo, Inst Invest Recursos Nat, Apdo Postal 2-105, Morelia 58041, Michoacan, Mexico TI - Relationships between canopy complexity and germination microsites for Phalaris arundinacea L AB - Microsites that prevent seed germination are critical for slowing the invasion of native plant communities by aggressive, clonal species. A suitable model for study is the clonal grass, Phalaris arundinacea, which reproduces prolifically from seed and is spreading into wetlands across temperate North America. Knowing that light conditions control its seed germination in the laboratory and that light varies with canopy complexity in a Wisconsin fen, we tested multiple attributes of microsites under spatially and temporally dynamic canopies (namely, presence/absence of a matrix species, number of species in the canopy, plus indirect effects of three soil water levels) for their control of germination in microcosms. Our 6-species canopies + the matrix of Glyceria striata had the densest cover and reduced R arundinacea germination to 1.9%, compared to 7.3% for 1-species canopies + the matrix. After selectively removing canopy components, germination increased to 36.1% for 6-species and 33.0% for 1-species canopies. Comparing canopies with each of the six species, germination declined in relation to increasing leaf width. Given moist soil, P. arundinacea germination microsites are determined by canopy complexity, which affects light penetration, which in turn determines germination rate MH - Mexico|Michoacan MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Ecology U5 - J;Article AV - English IS - 0029-8549 UR - ISI:000178825900008 L2 - diversity;fen;gaps;invasion;invasibility;REED CANARY GRASS; RECRUITMENT LIMITATION; SEEDLING RECRUITMENT; SOLIDAGO-ALTISSIMA; PLANT-POPULATIONS; NORTH-AMERICA; BIODIVERSITY; PRODUCTIVITY; DIVERSITY; DYNAMICS SO - Oecologia 2002 ;133(2):159-167 5943 UI - 9922 AU - Lindner A AU - Bonn D AU - Poire EC AU - Ben Amar M AU - Meunier J AD - Ecole Normale Super, Phys Stat Lab, F-75231 Paris, FranceNatl Autonomous Univ Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoLindner, A, Ecole Super Phys & Chim Ind Ville Paris, Lab Physicochim Struct & Macromol, 10 Rue Vauquelin, F-75231 Paris 05, France TI - Viscous fingering in non-Newtonian fluids AB - We study the viscous fingering or Saffman-Taylor instability in two different dilute or semi-dilute polymer solutions. The different solutions exhibit only one non-Newtonian property, in the sense that other non-Newtonian effects can be neglected. The viscosity of solutions of stiff polymers has a strong shear rate dependence. Relative to Newtonian fluids, narrower fingers are found for rigid polymers. For solutions of flexible polymers, elastic effects such as normal stresses are dominant, whereas the shear viscosity is almost constant. Wider fingers are found in this case. We characterize the non-Newtonian flow properties of these polymer solutions completely, allowing for separate and quantitative investigation of the influence of the two most common non-Newtonian properties on the Saffman-Taylor instability. The effects of the non-Newtonian flow properties on the instability can in all cases be understood quantitatively by redefining the control parameter of the instability MH - France MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 21 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000178965700010 L2 - HELE-SHAW CELL; SAFFMAN-TAYLOR PROBLEM; SHEAR-THINNING FLUID; SURFACE-TENSION; FLOW; INSTABILITY; SELECTION; PERTURBATIONS; STABILITY; MODELS SO - Journal of Fluid Mechanics 2002 ;469():237-256 5944 UI - 10000 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang CH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Cerutti A AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Observation of a 1750 MeV/c(2) enhancement in the diffractive photoproduction of K+K- AB - Using the FOCUS spectrometer with photon beam energies between 20 and 160 GeV, we confirm the existence of a diffractively photoproduced enhancement in K+K- at 1750 MeV/c(2) with nearly 100 times the statistics of previous experiments. Assuming this enhancement to be a single resonance with a Breit-Wigner mass shape, we determine its mass to be 1753.5 +/- 1.5 +/- 2.3 MeV/c(2) and its width to be 122.2 +/- 6.2 +/- 8.0 MeV/c(2). We find no corresponding enhancement at 1750 MeV/c(2) in K*K, and again neglecting any possible interference effects we place limits on the ratio Gamma(X(1750) --> K*K)/Gamma(X(1750) --> K+K-). Our results are consistent with previous photoproduction experiments, but, because of the much greater statistics, challenge the common interpretation of this enhancement as the phi(1680) seen in e(+)e(-) annihilation experiments. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000178757800007 L2 - RELATIVIZED QUARK-MODEL; VECTOR-MESON; ANNIHILATION; DECAYS; STATES SO - Physics Letters B 2002 ;545(1-2):50-56 5945 UI - 10038 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang KH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Cerutti A AU - Boschini M AU - D'Angelo PD AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - New measurements of the D+->(K)over-bar*(0)mu(+)nu form factor ratios AB - Using a large sample of D+ --> K- pi(+) mu(+) nu decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic form factor ratios: r(nu) and r(2). We find r(nu) = 1.504 +/- 0.057 +/- 0.039 and r(2) = 0.875 +/- 0.049 +/- 0.064. Our form factor results include the effects of the s-wave interference discussed in Phys. Lett. B 535 (2002) 43. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000178437300009 L2 - DECAY SO - Physics Letters B 2002 ;544(1-2):89-96 5946 UI - 10420 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang KH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Choi K AU - Park H AU - Alimonti G AU - Barberis S AU - Cerutti A AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Dept Geol, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - A new measurement of the Xi(0)(c) lifetime AB - Using data collected by the Fermilab experiment FOCUS, we measure the lifetime of the charmed baryon Xi(c)(0) using the decay channels Xi(c)(0) --> Xi(-) pi(+) and Xi(c)(0) --> Omega(-) K+. From a combined sample of 110 +/- 17 events we find tau (Xi(c)(0)) = 118(-12)(+14) +/-5 fs, where the first and second errors are statistical and systematic, respectively. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177558200002 L2 - LAMBDA(+)(C) SO - Physics Letters B 2002 ;541(3-4):211-218 5947 UI - 10421 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang KH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Cerutti A AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurement of the D+ and D-s(+) decays into K+K-K+ AB - We present the first clear observation of the doubly Cabibbo suppressed decay D+ --> K- K+ K+ and the first observation of the singly Cabibbo suppressed decay D-s(+) --> K-K+K+. These signals have been obtained by analyzing the high statistics sample of photoproduced charm particles of the FOCUS (E83 1) experiment at Fermilab. We measure the following relative branching ratios: Gamma(D+ --> K-K+K+)/Gamma(D+ --> K(-)pi(+)pi(+)) = (9.49 +/- 2.17 0.22) x 10(-4) and Gamma(D-s(+) --> K-K+K+)/Gamma(D-s(+) ---> K(-)K(+)pi(+)) = (8.95 +/- 2.12(-2.31)(+2.24)) x 10(-3) where the first error is statistical and the second is systematic. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177558200004 L2 - DALITZ PLOTS; SEARCH SO - Physics Letters B 2002 ;541(3-4):227-233 5948 UI - 10422 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang KH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Cerutti A AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - New measurements of the Gamma(D+->(K)over-bar(*0)mu(+)nu)/Gamma(D+-> K-pi(+)pi(+)) and Gamma(D-s(+)->phi mu(+)nu)/Gamma(D-s(+)->phi pi(+)) branching ratios AB - Using a large sample of charm semileptonic decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic branching ratios. We obtain values of Gamma(D+-->(K) over bar*(0)mu(+)nu)/Gamma(D+ --> (K) over bar (-)pi(+)pi(+)) = 0.602 +/- 0.010(stat) +/- 0.021(sys) and Gamma(D-s(+) --> phimu(+)nu)/Gamma(D-s(+) --> phipi(+)) = 0.54 +/- 0.033(stat) +/- 0.048(sys). Our D+ --> (K) over bar*(0)mu(+)nu result includes the effects of the s-wave interference discussed in Phys. Lett. B 535 (2002) 43. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177558200006 L2 - DECAYS SO - Physics Letters B 2002 ;541(3-4):243-250 5949 UI - 10518 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang KH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Cerutti A AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurements of relative branching ratios of Lambda(+)(c) decays into states containing Sigma AB - We have studied the Cabibbo suppressed decay Lambda(c)(+) --> K*(0)(892) and the Cabibbo favored decays Lambda(c)(+) --* Sigma(+)K(+)K(-), Lambda(c)(+) - - E(+)phi and Lambda(c)(+) -- - Xi*(0)(Sigma(+)K(-))K+ and measured their branching ratios relative to Lambda(c)(+) --+ Sigma(+)pi(+)pi(-) to be (7.8 +/- 1.8 +/- 1.3) %, (7.1 +/- 1.1 +/- 1.1) %, (8.7 +/- 1.6 +/- 0.6) % and (2.2 +/- 0.6 +/- 0.6) %, respectively. The first error is statistical and the second is systematic. We also report two 90% confidence level limits Gamma(Lambda(c)(+) --> Sigma(-)K(+)pi(+))/Gamma(Lambda(c)(+) --> Sigma+K*(0)(892)) < 35% and Gamma(Lambda(c)(+) --> Sigma(+)K(+)K(-))(NR)/Gamma(Lambda(c)(+) --> Sigma(+)pi(+)pi(-)) < 2.8%. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000177203200005 SO - Physics Letters B 2002 ;540(1-2):25-32 5950 UI - 10827 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Choi K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - New measurements of the D-0 and D+ lifetimes AB - A high statistics sample of photoproduced charm particles from the FOCUS (E831) experiment at Fermilab has been used to measure the D-0 and D+ lifetimes. Using about 210000 D-0 and 110000 D+ events we obtained the following values: 409.6 +/- 1.1 (statistical) +/- 1.5 (systematic) fs for D-0 and 1039.4 +/- 4.3 (statistical) +/- 7.0 (systematic) fs for D+. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000176556900003 L2 - D-MESON SYSTEM; PHYSICS SO - Physics Letters B 2002 ;537(3-4):192-200 5951 UI - 10831 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Webster M AU - Sheaff M AD - Univ Colorado, Dept Phys, Boulder, CO 80309, USAUniv Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20133 Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Colorado, Dept Phys, Boulder, CO 80309, USA TI - Reconstruction of Vees, Kinks, Xi(-)'s, and Omega(-)'s in the FOCUS spectrometer AB - We describe the various techniques developed in the Fermilab Wideband Experiments, E687 and FOCUS, to reconstruct long-lived states. The techniques all involve modifications to standard tracking techniques and are useful to report for future experiments. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000176527100018 L2 - charm physics;charged particle track reconstruction;hyperon decay;PERFORMANCE SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;484(1-3):174-193 5952 UI - 10832 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Sarwar S AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Mitchell R AU - Engh D AU - Johns WE AU - Hosack M AU - Nehring MS AU - Sheldon PD AU - Stenson K AU - Webster MS AU - Sheaff M AD - Univ Illinois, Loomis Lab 413, Urbana, IL 61801, USAUniv Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Illinois, Loomis Lab 413, Urbana, IL 61801, USA TI - Cherenkov particle identification in FOCUS AB - We describe the algorithm used to identify charged tracks in the fixed-target charm-photoproduction experiment FOCUS. We begin by describing the new algorithm and contrast this approach with that used in our preceding experiment - E687. We next illustrate the algorithm's performance using physics signals. Finally, we briefly describe some of the methods used to monitor the quantum efficiency and noise of the Cherenkov cells. (C) 2001 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 47 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000176527100026 L2 - Cherenkov;particle identification;experimental techniques;DECAYS SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;484(1-3):270-286 5953 UI - 10963 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Evidence for new interference phenomena in the decay D+-> K-pi(+)mu(+)nu AB - Using a large sample of charm semileptonic decays collected by the FOCUS photoproduction experiment at Fermilab, we present evidence for a small, even spin K(-)pi(+) amplitude that interferes with the dominant (K) over bar *(0) component in the D+ --> K(-)pi(+)mu(+)nu final state. Although this interference significantly distorts the D+ --> K(-)pi(+)mu(+)nu decay angular distributions, the new amplitude creates only a very small distortion to the observed kaon pion mass distribution when integrated over the other kinematic variables describing the decay. Our data can be described by (K) over bar *(0) interference with either a constant amplitude or broad spin zero resonance. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 38 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000176094400009 SO - Physics Letters B 2002 ;535(1-4):43-51 5954 UI - 11437 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferi A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - A high statistics measurement of the Lambda(+)(c) lifetime AB - A high statistics measurement of the Lambda(c)(+) lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis technique with particular attention to the determination of the systematic uncertainty. The measured value of 204.6+/-3.4 (stat )+/-2.5 (syst) fs from 8034+/-122 Lambda(c)(+) -->pK(-)pi(+) decays represents a significant improvement over the present world average MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000174905400008 SO - Physical Review Letters 2002 ;88(16): 5955 UI - 11745 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Vaandering EW AU - Butler JN AU - Cheung HWK AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Agostino L AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Segoni I AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Mirles A AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Search for CP violation in the decays D+ -> K-S pi(+) and D+ -> KSK+ AB - A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for D+ --> K(S)pi(+) and D+ --> KSK+. We have measured the following asymmetry parameters relative to D+ --> K- pi(+) pi(+): A(CP)(K(S)pi(+)) = (-1.6 +/- 1.5 +/- 0.9)%, A(CP)(KSK+) = (+6.9 +/- 6.0 +/- 1.5)%, and A(CP)(KSK+) = (+7.1 +/- 6.1 +/- 1.2)% relative to D+ --> K(S)pi(+). We have also measured the relative branching ratios and found Gamma(D+ --> (K) over bar K-0(+))/Gamma(D+ --> (K) over bar (0)pi(+))/Gamma(D+ --> K- pi(+) pi(+)) = (30.60 +/- 0.46 +/- 0.32)%, Gamma(D+ --> (K) over bar K-0(+))/Gamma(D+ --> K- pi(+) pi(+)) = (6.04 +/- 0.35 +/- 0.30)%, and Gamma(D+ --> (K) over bar K-0(-))/Gamma(D+ --> (K) over bar (0)pi(+)) = (19.96 +/- 1.19 +/- 0.96)% MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000173907500010 L2 - PHYSICS; MESONS SO - Physical Review Letters 2002 ;88(4): 5956 UI - 11927 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Bianco S AU - Kryemadhi A AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Cho K AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurement of natural widths of Sigma(0)(c) and Sigma(++)(c) baryons AB - In this letter we present a measurement of the natural widths of Sigma(c)(0) and Sigma(c)(++). Using data from the FOCUS experiment, we find Gamma( Sigma(c)(0)) = 1.55(-0.37)(+0.41) +/- 0.38 MeV/c(2) and Gamma(Sigma(c)(++)) = 2.05(-0.38)(+0.41) +/- 0.38 MeV/c(2). The first errors are statistical, the second systematic. These results are obtained with a sample of 913 Sigma(c)(0) --> Lambda(c)(+)pi(-) decays and 1110 Sigma(c)(++) --> Lambda(c)(++)pi(+) decays. These results are compared with recent theoretical predictions. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000173393000001 L2 - CHARMED BARYONS; QUARK-MODEL; DECAYS SO - Physics Letters B 2002 ;525(3-4):205-210 5957 UI - 11257 AU - Liou JJ AU - Shireen R AU - Ortiz-Conde A AU - Sanchez FJG AU - Cerdeira A AU - Gao X AU - Zou XC AU - Ho CS AD - Univ Cent Florida, Dept Elect & Comp Engn, Sch Elect Engn & Comp Sci, Orlando, FL 32816, USAHuazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R ChinaUniv Simon Bolivar, LEES, Caracas 1080A, VenezuelaCINVESTAV, IPN, Dept Ingn Electr, SEES, Mexico City 07300, DF, MexicoProMOS Technol Inc, R&D Div, Hsinchu, TaiwanLiou, JJ, Univ Cent Florida, Dept Elect & Comp Engn, Sch Elect Engn & Comp Sci, Orlando, FL 32816 USA TI - Influence of polysilicon-gate depletion on the subthreshold behavior of submicron MOSFETs AB - Ion implantation. followed by annealing process, often leads to nonuniform doping and considerable depletion effect in the polysilicon gate of submicron MOS devices. Such an effect can alter notably the subthreshold characteristics and invalidate the conventional subthreshold current model. This paper studies the polysilicon-gate depletion effects on the subthreshold behavior based on results obtained from two-dimensional device simulation. An empirical expression is also suggested to describe the subthreshold current including the depletion effect. (C) 2002 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Peoples R China MH - Taiwan MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 0026-2714 UR - ISI:000175318700005 L2 - IV CHARACTERISTICS SO - Microelectronics Reliability 2002 ;42(3):343-347 5958 UI - 11433 AU - Lira-Ruan V AU - Ross EJH AU - Sarath G AU - Klucas RV AU - rredondo-Peter R AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Autonoma Estado Morelos, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoUniv Nebraska, George W Beadle Ctr, Dept Biochem, Lincoln, NE 68588, USAArredondo-Peter, R, Univ Autonoma Estado Morelos, Fac Ciencias, Ave Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Mapping and analysis of a hemoglobin gene family from Oryza sativa AB - A hemoglobin (hb) gene family was identified in rice, consisting of four functional hb copies located in BAC inserts OSM11719 and OSM11676, which contain the gene clusters hb1/hb3/hb4 and hb2, respectively. Sequence comparison with databases revealed that a number of potential promoters exist upstream from the hb genes suggesting that these genes are differentially expressed in rice. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Mexico|Morelos MH - USA PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0981-9428 UR - ISI:000174884700002 L2 - function;gene family;hemoglobin;Oryza;promoters;PLANTS SO - Plant Physiology and Biochemistry 2002 ;40(3):199-202 5959 UI - 10399 AU - Lira J AU - Maletti G AD - Natl Autonomous Univ Mexico, Inst Geofis, Circuito Inst, Mexico City 04510, DF, MexicoTech Univ Denmark, DK-2800 Lyngby, DenmarkLira, J, Natl Autonomous Univ Mexico, Inst Geofis, Circuito Inst, Cd Univ, Mexico City 04510, DF, Mexico TI - A supervised contextual classifier based on a region-growth algorithm AB - A supervised classification scheme to segment optical multi-spectral images has been developed. In this classifier, an automated region-growth algorithm delineates the training sets. This algorithm handles three parameters: an initial pixel seed, a window size and a threshold for each class. A suitable pixel seed is manually implanted through visual inspection of the image classes. The best value for the window and the threshold are obtained from a spectral distance and heuristic criteria. This distance is calculated from a mathematical model of spectral separability. A pixel is incorporated into a region if a spectral homogeneity criterion is satisfied in the pixel-centered window for a given threshold. The homogeneity criterion is obtained from the model of spectral distance. The set of pixels forming a region represents a statistically valid sample of a defined class signaled by the initial pixel seed. The grown regions therefore constitute suitable training sets for each class. Comparing the statistical behavior of the pixel population of a sliding window with that of each class performs the classification. For region-growth, a window size is employed for each class. For classification, the centered pixel of the sliding window is labeled as belonging to a class if its spectral distance is a minimum to the class. The window size used for classification is a function of the best separability between the classes. A series of examples, employing synthetic and satellite images are presented to show the value of this classifier. The goodness of the segmentation is evaluated by means of the x coefficient and a visual inspection of the results. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Denmark MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0098-3004 UR - ISI:000177671200009 L2 - region growing;context classification;homogeneity criterion;spectral;distance;spectral separability;IMAGE CLASSIFICATION; SEGMENTATION; INFORMATION; TEXTURE SO - Computers & Geosciences 2002 ;28(8):951-959 5960 UI - 9940 AU - Lisenfeld U AU - Braine J AU - Duc PA AU - Leon S AU - Charmandaris V AU - Brinks E AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainObserv Bordeaux, INSU, CNRS, UMR 5804, F-33270 Florac, FranceCNRS, URA 2052, F-91191 Gif Sur Yvette, FranceCEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceUniv Cologne, Inst Phys, D-5000 Cologne 41, GermanyCornell Univ, Dept Astron, Ithaca, NY 14853, USAObserv Paris, LERMA, F-75014 Paris, FranceUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoINAOE, Puebla 72000, MexicoLisenfeld, U, CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain TI - Abundant molecular gas in the intergalactic medium of Stephan's Quintet AB - Stephan's Quintet (SQ) is a system consisting of at least four interacting galaxies which is well known for its complex dynamical and star formation history. It possesses a rich intergalactic medium (IGM), where hydrogen clouds, both atomic and molecular, associated with two starbursts (refered to as SQ A and B) have been found. In order to study the extent, origin and fate of the intergalactic molecular gas and its relation to the formation of stars outside galaxies and Tidal Dwarf Galaxies (TDGs), we mapped with the IRAM30 m antenna the carbon monoxide (CO) towards several regions of the IGMin SQ. In both SQ A and B, we detected unusually large amounts of molecular gas (3.1 x 10(9) M-. and 7 x 10(8) M-., respectively). In contrast, no significant CO detection was achieved towards HII regions south of the pair NGC 7318a/b despite their high Halpha luminosities. The molecular gas is very extended in both SQ A and SQ B, over areas of between 15 and 25 kpc. The CO clouds seem to have otherwise different properties and may be of a different nature. The integrated CO line of SQ A is in particular much wider than in SQ B. Its CO spectrum shows emission at two velocities (6000 and 6700 km s(-1)) that are coincident with two HI lines. The strongest emission at 6000 km s(-1) is however spatially offset from the HI emission and situated on a ridge south-east of the starburst region. In SQ B the CO emission coincides with that of tracers of star formation (Halpha, 15 mum and radio continuum). The CO peak lies slightly offset from the HI peak towards a steep HI gradient. This is indicating that the molecular gas is forming in-situ, possibly in a region of compressed HI, with subsequent star formation. The star forming region at SQ B is the object in SQ that most resembles a TDG MH - France MH - Germany MH - Mexico|Guanajuato MH - Mexico|Puebla MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178885000011 L2 - galaxies : clusters : individual : Stephan's Quintet;galaxies : individual : NGC 7319, NGC 7318b galaxies : interaction;galaxies : ISM;intergalactic medium;TIDAL DWARF GALAXIES; INFRARED-EMISSION; SPIRAL GALAXIES; COMPACT-GROUPS; SHOCKS; STARBURST; SYSTEM; CO SO - Astronomy & Astrophysics 2002 ;394(3):823-833 5961 UI - 10492 AU - Litwak S AU - Zadok D AU - Garcia-de Quevedo V AU - Robledo N AU - Chayet AS AD - CODET Aris Vis Inst, Tijuana 22320, BC, MexicoAsaf A Roffe Hosp, Dept Ophthalmol, Tel Aviv, IsraelChayet, AS, CODET Aris Vis Inst, Padre Kino 10159, Tijuana 22320, BC, Mexico TI - Laser-assisted subepithelial keratectomy versus photorefractive keratectomy for the correction of myopia - A prospective comparative study AB - Purpose: To compare the early postoperative visual rehabilitation after laser-assisted subepithelial keratectomy (LASEK) and photorefractive keratectomy (PRK) for the correction of myopia. Setting: CODET Aris Vision Institute, Tijuana, Mexico. Methods: This prospective study included 50 eyes of 25 patients with myopia who received LASEK in 1 eye and PRK in the contralateral eye. Excimer laser corneal ablation was done using the Nidek EC-5000 excimer laser. Patients were seen at 1 and 3 days, 1 week, and 1 month. Discomfort, subjective uncorrected visual acuity (UCVA), objective UCVA, best corrected visual acuity (BCVA), corneal clarity (haze), and time for corneal reepithelialization were analyzed. Results: Seventy-two percent and 80% of the LASEK eyes had more discomfort at 1 day and 3 days, respectively. Eighty percent and 96% of the PRK eyes had better subjective UCVA at 1 day and 3 days, respectively. Corneas were fully reepithelialized at a mean of 3.3 days +/- 0.5 (SD) and 3.6 +/- 0.5 days in the PRK and LASEK groups, respectively. At 1 month, the UCVA was similar in both groups; no eye had lost lines of BCVA or developed haze. Conclusions: Both LASEK and PRK were effective and safe procedures in the surgical correction of myopia at the 1-month postoperative visit. Patients reported less discomfort and better visual acuity in their PRK eye during the early postoperative period. Patients should be informed that LASEK, whose acronym is similar to that of laser in situ keratomileusis, has a recovery speed that is similar to that of surface laser refractive procedures such as PRK. (C) 2002 ASCRS and ESCRS MH - Israel MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 38 U4 - Ophthalmology;Surgery U5 - J;Article AV - English IS - 0886-3350 UR - ISI:000177417200015 L2 - IN-SITU KERATOMILEUSIS; EPITHELIAL KERATOMILEUSIS; IATROGENIC KERATECTASIA; DIOPTERS SO - Journal of Cataract and Refractive Surgery 2002 ;28(8):1330-1333 5962 UI - 10944 AU - Liu J AU - Vemuri BC AU - Marroquin JL AD - Univ Florida, Dept Comp & Informat Sci, Gainesville, FL 32611, USACIMAT, Guanajuato 36000, MexicoVemuri, BC, Univ Florida, Dept Comp & Informat Sci, Gainesville, FL 32611 USA TI - Local frequency representations for robust multimodal image registration AB - Automatic registration of multimodal images involves algorithmically estimating the coordinate transformation required to align the data sets. Most existing methods in the literature are unable to cope with registration of image pairs with large nonoverlapping field of view (FOV). We propose a robust algorithm, based on matching dominant local frequency image representations, which can cope with image pairs with large nonoverlapping FOV. The local frequency representation naturally allows for processing the data at different scales/resolutions, a very desirable property from a computational efficiency view point Our algorithm involves minimizing-over all rigid/affine transformations-the integral of the squared error (ISE or L2E) between a Gaussian model of the residual and its true density function. The residual here refers to the difference between the local frequency representations of the transformed (by an unknown transformation) source and target data. We present implementation results for image data sets, which are misaligned magnetic resonance (MR) brain scans obtained using different image acquisition protocols as well as misaligned MR-computed tomography scans. We experimently show that our L2E-based scheme yields better accuracy over the normalized mutual information MH - USA MH - Mexico|Guanajuato PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Computer Science, Interdisciplinary Applications;Engineering, Biomedical;Engineering, Electrical & Electronic;Imaging Science & Photographic Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0278-0062 UR - ISI:000176174400005 L2 - L2B;local frequency;normalized mutual information (MI);robust image reigstration;OPTICAL-FLOW; FILTERS SO - Ieee Transactions on Medical Imaging 2002 ;21(5):462-469 5963 UI - 10794 AU - Liubashina O AU - Bagaev V AU - Khotiantsev S AD - IP Pavlov Physiol Inst, Lab Cort Visceral Physiol, St Petersburg 199034, RussiaNatl Autonomous Univ Mexico, Fac Engn, Div Elect Engn, Mexico City 04510, DF, MexicoLiubashina, O, IP Pavlov Physiol Inst, Lab Cort Visceral Physiol, Nab Makarova 6, St Petersburg 199034, Russia TI - Amygdalofugal modulation of the vago-vagal gastric motor reflex in rat AB - In experiments on urethane anaesthetized rats the influence of electrical stimulation of the central nucleus of the amygdala (CNA) on gastric motility and activity of gastric-related neurons of the dorsal vagal complex was studied. Stimulation of the CNA effected spontaneous gastric motility and caused both excitatory and inhibitory changes of vagal-induced gastric relaxation. The most significant effects, mainly inhibitory, were observed under stimulation of the medial CNA. This amygdaloid area was found to influence activity of gastric-related neurons of the dorsal vagal complex. Excitatory and inhibitory changes of their vagal-induced responses under the amygdala stimulation Manifested as general modulation of all phases of the reaction or selective modulation of some of them. These mechanisms may lie at the base of amygdalofugal modulation of gastric reflex activity. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000176622200010 L2 - amygdala;bulbar dorsal vagal complex;vagus nerve;gastric motility;CENTRAL NUCLEUS; ELECTRICAL-STIMULATION; PROJECTIONS; COMPLEX; NERVE SO - Neuroscience Letters 2002 ;325(3):183-186 5964 UI - 10060 AU - Lizano S AU - Garay G AD - UNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Chile, Dept Astron, Santiago, ChileLizano, S, UNAM, Inst Astron, Apdo Postal 72-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Environs and formation of massive stars MH - Chile MH - Mexico|Michoacan PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article AV - English IS - 0074-1809 UR - ISI:000178493500041 L2 - MOLECULAR CLOUDS; CORES SO - Highlights of Astronomy, Vol 12 2002 ;12():161-163 5965 UI - 9724 AU - Lobell DB AU - Ortiz-Monasterio JI AU - Addams CL AU - Asner GP AD - Carnegie Inst Washington, Dept Global Ecol, Stanford, CA 94305, USAStanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305, USACIMMYT, Int Maize & Wheat Improvement Ctr, Wheat Program, Mexico City 06600, DF, MexicoLobell, DB, Carnegie Inst Washington, Dept Global Ecol, 290 Panama St, Stanford, CA 94305 USA TI - Soil, climate, and management impacts on regional wheat productivity in Mexico from remote sensing AB - Understanding sources of variability in net primary productivity is critical for projecting ecosystem responses to global change, as well as for improving management in agricultural systems. However, the processes controlling productivity cannot be fully addressed with field-, or global-scale observations. In this study, we performed a regional observational experiment using remote sensing to analyze sources of yield variability in an irrigated wheat system in Northwest Mexico. Four different soil types and 3 years with contrasting weather served as the two main experimental factors, while remotely sensed yields provided thousands of observations within each treatment. Analysis of variance revealed that 6.6 and 4.6% of the variability in yields could be explained by soil type and climate, respectively, with a negligible fraction explained by soil-type-climate interactions. The majority of the variability in yields (88.6%) was observed within treatments and was attributed mainly to variations in management. The impacts of management were observed to depend significantly on both soil type and climate, as revealed by distributions of yields within each treatment. The results indicate that changes in management will have the greatest impact on regional production, and will also play a large role in determining the impact of any changes in climate or soil. This work also demonstrates the use of consistent remote sensing estimates to perform regional studies unfeasible with field-based approaches. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000179618000003 L2 - carbon cycle;climate impacts;remote sensing;wheat;yield;yield loss;NET PRIMARY PRODUCTION; TERRESTRIAL ECOSYSTEMS; FOOD-PRODUCTION SO - Agricultural and Forest Meteorology 2002 ;114(1-2):31-43 5966 UI - 9991 AU - Logvinov GN AU - Gurevich YG AU - Lashkevich IM AD - JPN, ESIME Culhuacan, SEPI, Mexico City 04430, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoTernopil State Med Acad, UA-46001 Ternopol, UkraineLogvinov, GN, JPN, ESIME Culhuacan, SEPI, Av Santa Ana 1000,Code Post 04430, Mexico City 04430, DF, Mexico TI - Electron thermal waves in submicron semiconductor films AB - Electron thermal waves originated owing to absorption of modulation laser beam are studied in submicron unipolar semiconductor films. We assume that the film's thickness is much less than the electron cooling length. Thanks to this assumption the thermal waves propagate only in the electron gas, and there are absent in the phonon subsystem. General boundary conditions are obtained for a heat diffusion equation taking into account both the electron surface thermal conductivity and the electron surface heat capacity. The concept of the electron surface heat capacity is introduced for the first time. Complex thermoelectric response to the electron thermal waves is analyzed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000178896700033 L2 - thermal waves;surface thermal conductivity;surface heat capacity;DIFFUSION SO - Applied Surface Science 2002 ;199(1-4):312-318 5967 UI - 9483 AU - Loinard L AU - Castets A AU - Ceccarelli C AU - Lefloch B AU - Benayoun JJ AU - Caux E AU - Vastel C AU - Dartois E AU - Tielens AGGM AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoObserv Univ Bordeaux 1, F-33270 Florac, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble, FranceUniv Toulouse 3, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 04, FranceInst Astrophys Spatiale, F-91405 Orsay, FranceSpace Res Org Netherlands, NL-9700 AV Groningen, NetherlandsLoinard, L, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 7203 Xangari, Morelia 58089, Michoacan, Mexico TI - Doubly deuterated formaldehyde in star-forming regions: an observational approach AB - We present the results of a search for the doubly deuterated form of formaldehyde (D2CO) in a large sample of objects associated to star-formation. D2CO was detected in nearly 20 low-mass protostars, a success rate of 100%, with [D2CO]/[H2CO] abundance ratios of 2-40%. On the other hand, no detection was obtained towards more massive protostars (where [D2CO]/[H2CO] < 0.5%) nor towards the shocks along the molecular outflows powered by protostars (where [D2CO]/[H2CO] < 0.5-1%). The results reported here multiply the number of D2CO detections by a factor of 6. Since low temperatures and high densities are needed to obtain high levels of multiple deuteration, the D2CO detected towards low-mass protostars is most likely currently desorbed from dust grain mantles where it has accumulated and/or formed during the earlier and colder pre-stellar stage. The lack of detection towards molecular outflows is naturally explained in this scheme since the high-velocity gas there is mostly previously ambient material, that never went through the cold phase required to attain high deuteration levels. The lack of detection towards higher mass protostars indicates that the chemistry in low-mass protostars is significantly different from that in higher mass objects, and that much caution should be used when generalizing chemical results obtained in high-mass sources to low-mass objects. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Michoacan MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000180142300013 L2 - astrochemistry-ISM;abundances-ISM;molecules-stars;formation-ISM;outflows;GRAIN SURFACE-CHEMISTRY; PROTOSTAR IRAS-16293-2422; SIO SHOCKS; EMISSION; TAURI; RESOLUTION; ABUNDANCES; CLOUDS; L134N; D2CO SO - Planetary and Space Science 2002 ;50(12-13):1205-1213 5968 UI - 9569 AU - Loinard L AU - Rodriguez LF AU - D'Alessio P AU - Wilner DJ AU - Ho PTP AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USALoinard, L, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 72-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Orbital proper motions in the protobinary system L1527/IRAS 04368+2557? AB - Using high angular resolution 7 mm Very Large Array (VLA) observations, we show that the low-mass protostellar object IRAS 04368+2557 in L1527 is composed of two radio sources separated in projection by 25 AU. One of the two components is extended in the direction perpendicular to the outflow powered by IRAS 04368+2557 and is, most likely, a compact accretion disk (R similar to 20 AU), similar to those found in L1551 IRS 5 by Rodriguez et al. As in L1551 IRS 5, the disk found here is small compared to those around T Tauri stars. Tidal interactions with nearby companions provide a natural way of truncating disks, and we argue that the two millimeter-wavelength sources in L1527 trace a compact binary system, where the disk surrounding one of the components has been truncated by the tidal influence of the other. A comparison between observations obtained in 1996 and 2002 reveals large proper motions, which can be only partly attributed to the overall large-scale motion of the region in which IRAS 04368+2557 is located. The remaining "residual" proper motions might trace the orbital motion of the binary and would suggest a total mass for the system larger than 0.2 M. and likely of the order of 0.5-2 M. This mass (only a small fraction of which is in the disk) is of the same order as that of the extended surrounding envelope of gas and dust traced by far-infrared and submillimeter observations (M-env similar to 0.5 M.), implying that the stars that will eventually form out of IRAS 04368+2557 would have already acquired a significant fraction of their final masses. It is worth noting that multiepoch VLA studies of nearby protobinary systems similar to that presented here could provide direct mass estimates in most nearby star-forming sites. Combined with submillimeter observations of the surrounding envelopes, this would provide a more reliable measure of the evolutionary status of binary protostars MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179914500012 L2 - astrometry;binaries : general;ISM : jets and outflows;stars : formation;LOW-MASS PROTOSTARS; DISK; TAURUS; STARS SO - Astrophysical Journal 2002 ;581(2):L109-L113 5969 UI - 10977 AU - Lopez-Alarcon M AU - Garza C AU - Habicht JP AU - Martinez L AU - Pegueros V AU - Villalpando S AD - Cornell Univ, Div Nutr Sci, Ithaca, NY 14853, USAHosp Pediat Mexico City, Ctr Med Nacl, IMSS, Unidad Invest Med Nutr, Mexico City, DF, MexicoGarza, C, Cornell Univ, Div Nutr Sci, Ithaca, NY 14853, USA TI - Breastfeeding attenuates reductions in energy intake induced by a mild immunologic stimulus represented by DPTH immunization: Possible roles of interleukin-1 beta, tumor necrosis factor-alpha and leptin AB - An attenuated severity of infections is among the well-documented benefits of breast-feeding. The degree to which this attenuated severity extends to the amelioration of anorexia is understood incompletely, and possible underlying mechanisms have received limited evaluation. This study was designed to test whether breast-feeding attenuates reductions in energy intake associated with a mild immunologic stimulus and to assess poststimulus relationships among putative reductions in energy intake and serum interleukin (IL)-1beta, tumor necrosis factor (TNF)-alpha and leptin concentrations. A quasi-experimental, hospital-based study was conducted in 23 healthy fully breast- (BF) and formula-fed (FF) infants who received the quadruple diphtheria, pertussis, tetanus and hemophilus influenza (DPTH) immunization as an immunologic challenge. Only FF infants had decreased energy intakes (12 +/- 2%, P = 0.001) after immunization. Leptin concentrations increased after immunization only in FF infants (30 +/- 7%, P = 0.03). Correlations between postimmunization increases in IL-beta and reductions in energy intake were of borderline significance (r = -0.56, P = 0.08). These findings support the view that breast-feeding protects against anorectic responses to mild immunologic stimuli. Increases in leptin are associated with reductions in energy consumption in the postimmunization period in FF infants and postimmunization changes in IL-1beta concentrations likely are related to reductions in energy intake in response to immunologic stimuli MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 4 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000176033300033 L2 - breast-feeding;infants;interleukin-1 beta;tumor necrosis factor-alpha;leptin;infections;anorexia;FOOD-INTAKE; BREAST-MILK; FED INFANTS; HUMANS; CHILDREN SO - Journal of Nutrition 2002 ;132(6):1293-1298 5970 UI - 9553 AU - Lopez-Alvarenga JC AU - Zarinan T AU - Olivares A AU - Gonzalez-Barranco J AU - Veldhuis JD AU - Ulloa-Aguirre A AD - Inst Mexicano Seguro Social, Res Unit Reprod Med, Unidad Independencia, Mexico City 10101, DF, MexicoInst Mexicano Seguro Social, Res Unit Dev Biol, Unidad Independencia, Mexico City 10101, DF, MexicoInst Mexicano Seguro Social, Inst Nacl Ciencias Med & Nutr, Unidad Independencia, Mexico City 10101, DF, MexicoInst Mexicano Seguro Social, Dept Endocrinol & Metab, Unidad Independencia, Mexico City 10101, DF, MexicoUniv Virginia, Hlth Sci Ctr, Dept Internal Med, Charlottesville, VA 22908, USAUlloa-Aguirre, A, Inst Mexicano Seguro Social, Res Unit Reprod Med, Unidad Independencia, Apartado Postal 99-065, Mexico City 10101, DF, Mexico TI - Poorly controlled type I diabetes mellitus in young men selectively suppresses luteinizing hormone secretory burst mass AB - Alterations in the reproductive axis function are present to a variable extent in patients with type 1 diabetes mellitus (IDDM). Results from studies in IDDM men have yielded discrepant findings, which may reflect nonuniform patient selection criteria, age, diabetic status, duration of the disease and differences in sampling protocols. To more clearly define the impact of early diabetic alterations in the male reproductive axis, we applied a combined strategy of patient selection restricted to young men with relatively short duration of IDDM, dual control groups, multiparameter deconvolution analysis to assess LH secretory activity, and assessment of time-dependent changes in human chorionic gonadotropin (hCG)-stimulated serum testosterone concentrations. Three groups of subjects were studied: 11 young men with poorly controlled IDDM, 9 well controlled diabetics, and 9 healthy men. All volunteers underwent blood sampling at 10-min intervals before and after 2 consecutive iv pulses of 10 mug GnRH. On a separate day, 40 IU/kg hCG were given im, and blood samples were collected before hCG administration, every 60 min thereafter for 6 h, and then 24, 48, and 72 h after the injection. Mean serum LH concentrations across the basal 6-h sampling period were significantly (P < 0.05) decreased in men with poorly controlled IDDM (11 +/- 1.6 IU/liter) compared with those in well controlled diabetics (19 +/- 1.8 IU/Iiter) and healthy controls (19 +/- 1.5 IU/liter). Multiple parameter deconvolution analysis revealed a 50% reduction in the mass of LH secreted per burst and the pulsatile LH secretion rate in poorly controlled IDDM (mass of LH secreted/burst, 7 +/- 1.1 vs. 12 +/- 2.1 and 13 +/- 1.5 IU/liter; LH secretion rate, 47 +/- 6.3 vs. 78 +/- 10 and 87 +/- 11 IU/liter.6 h; poorly controlled vs. well controlled IDDM and healthy controls, respectively; P < 0.05 for both parameters). Uncontrolled IDDM patients had significantly (P<0.05) lower integrated serum LH concentrations after the first and second GnRH pulses (first GnRH pulse, 4460+/-770 vs. 7250+/-1200 and 5120+/-910 IU/liter; second pulse, 4700+/-615 vs. 7640+/-881 and 7100+/-1230 IU/liter; poorly controlled vs. well controlled IDDM and healthy men, respectively) and markedly attenuated LH secretory burst mass after the second GnRH stimulus (49+/-8.8 vs. 90+/-13 and 83+/-19 IU/liter; poorly controlled vs. well controlled IDDM and healthy controls, respectively). The biological to immunological ratio of LH released in baseline conditions was higher in uncontrolled IDDM patients (0.81+/-0.10) than in controlled IDDM (0.37+/-0.08) and healthy controls (0.48+/-0.06; P<0.01), whereas LH released in response to exogenous GnRH exhibited comparable ratios among the three study cohorts. Baseline serum testosterone levels as well as absolute and incremental responses to exogenous hCG did not differ by degree of metabolic control. Collectively, these results indicate that the function of the hypothalamic-gonadotrope axis is compromised in young men with poorly controlled IDDM, such that the amplitude of spontaneous pulsatile and exogenous GnRH-stimulated LH secretion is attenuated. This central hypogonadotropism is paradoxically associated with the presence in the circulation of gonadotropin molecules with enriched biological activity, which is evidently sufficient to temporarily maintain normal total testosterone concentrations in the earlier stages of IDDM MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 3 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000179976300027 L2 - GONADOTROPIN-RELEASING-HORMONE; HUMAN CHORIONIC-GONADOTROPIN; FOLLICLE-STIMULATING-HORMONE; RAT TESTICULAR CELLS; GROWTH-FACTOR-I; DECONVOLUTION ANALYSIS; GONADAL DYSFUNCTION; APPROXIMATE ENTROPY; SERUM TESTOSTERONE; SEXUAL-MATURATION SO - Journal of Clinical Endocrinology and Metabolism 2002 ;87(12):5507-5515 5971 UI - 11934 AU - Lopez-Bastidas C AU - Maytorena JA AU - Liebsch A AD - KFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, D-52425 Julich, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoLopez-Bastidas, C, KFA Julich GmbH, Forschungszentrum, Inst Festkorperforsch, Postfach 1913, D-52425 Julich, Germany TI - Hot-electron dynamics at noble metal surfaces AB - The dynamics of excited electronic states at Ag surfaces is studied by evaluating the quasiparticle self-energy within the GW approximation. The screened Coulomb interaction W is shown to be sensitive to the spatial variation of s-d screening near the surface. In the region of s-electron spill-out electronic damping is stronger than in the bulk due to the reduced s-d polarization, giving rise to shorter surface-state lifetimes. The lifetime of Ag image states is expected to be strongly reduced due to decay into surface plasmons MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000173448900104 L2 - IMAGE-POTENTIAL STATES; SCANNING TUNNELING SPECTROSCOPY; RESOLVED 2-PHOTON PHOTOEMISSION; INELASTIC LIFETIMES; PLASMON DISPERSION; COPPER SURFACES; AG CLUSTERS; ENERGY; NANOPARTICLES; MICROSCOPE SO - Physical Review B 2002 ;65(3): 5972 UI - 11219 AU - Lopez-Carrillo L AU - Lopez-Cervantes M AU - Torres-Sanchez L AU - Blair A AU - Cebrian ME AU - Garcia RM AD - Mexico Secretariat Hlth, Natl Inst Publ Hlth, Cuernavaca, Morelos, MexicoNatl Inst Hlth, Mexico City, DF, MexicoNCI, Rockville, MD, USANatl Polytech Inst, Ctr Res & Adv Studies, Mexico City, DF, MexicoLopez-Carrillo, L, Av Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Serum levels of beta-hexachlorocyclohexane, hexachloro benzene and polychlorinated biphenyls and breast cancer in Mexican women AB - Information on the association between exposure to beta-hexachlorocyclobexane (beta-HCH), hexachlorobenzene (HCB) or polychlorinated byphenyls (PCBs) and the incidence of breast cancer is inconclusive. However, exposure to such compounds is a public health concern in Mexico and is subject to recent regulation. Serum levels of beta-HCH, HCB and PCBs were analysed in 95 histologically confirmed breast cancer cases and 95 hospital controls, 20-79 years of age, from Mexico City, enrolled between March 1994 and April 1996. After adjusting for established risk factors, there was no evidence of a relationship between beta-HCH, HCB and PCBs and breast cancer risk (OR for beta-HCH tertile 3 versus tertile 1: 1.05 95% CI 0.46-2.40; OR for HCB tertile 3 versus tertile 1: 0.46 95% CI 0.20-1.07; OR for PCBs 1.3195% CI 0.33-5.21 for the high category of exposure). This study lends no support to the case for a role for beta-HCH, HCB or PCBs in breast cancer aetiology. (C) 2002 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Oncology U5 - J;Article AV - English IS - 0959-8278 UR - ISI:000175436600004 L2 - beta-hexachlorocyclohexane;breast cancer;case-control;hexachlorobenzene;Mexico;organochlorine compounds;polychlorinated biphenyls;serum levels;ENVIRONMENTAL ORGANOCHLORINE EXPOSURE; ADIPOSE-TISSUE CONCENTRATIONS; RISK; PESTICIDES SO - European Journal of Cancer Prevention 2002 ;11(2):129-135 5973 UI - 9926 AU - Lopez-Juarez I AU - Howarth M AD - CIATEO AC, Ctr Tecnol Avanzada, El Marques 76246, Queretaro, MexicoSheffield Hallam Univ, Sch Engn, Sheffield S1 1WB, S Yorkshire, EnglandLopez-Juarez, I, CIATEO AC, Ctr Tecnol Avanzada, Manantiales 23 A,, El Marques 76246, Queretaro, Mexico TI - Knowledge acquisition and learning in unstructured robotic assembly environments AB - Mechanical assembly by robots has traditionally depended on simple sensing systems and the robot manufacturers programming language. However, this restricts the use of robots in complex manufacturing operations. An alternative to robot programming is the creation of self-adaptive robots based on the adaptive resonance theory (ART) artificial neural network (ANN). The research presented in this paper shows how robots can operate autonomously in unstructured environments. This is achieved by providing the robot with a primitive knowledge base (PKB) of the environment. This knowledge is gradually enhanced on-line based on the contact force information acquired during operations. The robot resembles a blindfold person performing the same task since no information is provided about the localisation of the fixed assembly component. The design of a novel neural network controller (NNC) based on the Fuzzy ARTMAP network and its implementation results on an industrial robot are presented, which validate the approach. (C) 2002 Elsevier Science Inc. All rights reserved MH - United Kingdom MH - Mexico|Queretaro PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Information Systems U5 - J;Article AV - English IS - 0020-0255 UR - ISI:000178952100005 L2 - robotic assembly;neural network controller;force control;on-line learning;adaptive resonance theory;skill acquisition;knowledge discovery;NEURAL-NETWORK ARCHITECTURE; MULTIDIMENSIONAL MAPS; RECOGNITION; ARTMAP SO - Information Sciences 2002 ;145(1-2):89-111 5974 UI - 11568 AU - Lopez-Malo A AU - Alzamora SM AU - Palou E AD - Univ Amer Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, Cholula, MexicoUniv Buenos Aires, FCEyN, Dept Ind, Buenos Aires, DF, ArgentinaLopez-Malo, A, Univ Amer Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, Cholula, Mexico TI - Aspergillus flavus dose-response curves to selected natural and synthetic antimicrobials AB - The effects of selected concentrations of antimicrobials from natural (vanillin, thymol, eugenol, carvacrol or citral) or synthetic (potassium sorbate or sodium benzoate) origin on Aspergillus flavus lag time inoculated in laboratory media formulated at water activity (a(w)) 0.99 and pH 4.5 or 3.5, were evaluated. Time to detect a colony with a diameter > 0.5 mm was determined. Mold response was modeled using the Fermi function. Antimicrobial minimal inhibitory concentration (MIC) was defined as the minimal required inhibiting mold growth for 2 months, Fermi function successfully captured A. flavus dose-response curves to the tested antimicrobials with a highly satisfactory fit. Fermi equation coefficients, P-c and k, were used to compare antimicrobials and assess the effect of pH. Important differences in P-c and k were observed among antimicrobials, being natural antimicrobials less pH dependent than synthetic antimicrobials. A large P-c value represents a small antimicrobial effect on A. flavus lag time; thus, high concentrations are needed to delay growth, A. flavus exhibited higher sensitivity to thymol, eugenol, carvacrol, potassium sorbate (at pH 3.5), and sodium benzoate (at pH 3.5) than to vanillin or citral. MICs varied from 200 ppm of sodium benzoate at pH 3.5 to 1800 ppm of citral at both evaluated pHs. (C) 2002 Elsevier Science B.V All rights reserved MH - Argentina MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0168-1605 UR - ISI:000174523900013 L2 - Aspergillus flavus;dose-response;antimicrobials;VANILLIN; GROWTH; TIME SO - International Journal of Food Microbiology 2002 ;73(2-3):213-218 5975 UI - 11938 AU - Lopez-Marin LM AU - Montrozier H AU - Lemassu A AU - Garcia E AU - Segura E AU - Daffe M AD - CNRS, Inst Pharmacol & Biol Struct, F-31077 Toulouse 04, FranceUniv Toulouse 3, UMR 5089, F-31077 Toulouse, FranceInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Mexico City, DF, MexicoDaffe, M, CNRS, Inst Pharmacol & Biol Struct, F-31077 Toulouse 04, France TI - Structure and antigenicity of the major glycolipid from Taenia solium cysticerci AB - Lipids were extracted from cysticerci of the human tapeworm Taenia solium isolated from various infected pigs and analysed by two-dimensional thin-layer chromatography. These consisted of both alkali-labile and alkali-stable glycolipids, and phosphorylated non-glycosylated lipids. Because abundant and immunogenic glycolipids of parasites have been implicated in host-parasite interactions, the major lipid. an alkali-stable glycolipid. was purified by chromatography and its structure and antigenicity were determined. The structure of the major glycolipid of T solium, GSL-I, was elucidated through a combination of chemical degradative methods, gas chromatography/mass spectrometry analyses of the degradative products, matrix-assisted-laser desorption/ionisation time of flight mass spectrometry and nuclear magnetic resonance spectroscopy. This analytical strategy led to the identification of a family of beta-galactosylceramides composed mainly of phytosphinganine (2-hydroxylated sphinganine) N-acylated by C16-C24 fatty acids, with the predominance of 2-hydroxylated homologues. Enzyme-linked immunosorbent assay showed no correlation between the antibody titres directed against GSL-I in the human sera and the infective status, in contrast, a very high specific immunoreactivity and a sensitivity above 50% were observed when GSL-I was tested with cerebrospinal fluids from well characterised infected humans. Thus, although these results do not support the use of GSL-I alone as an antigen for the detection of neurocysticercosis, its use as part of an antigen cocktail for the diagnosis of the disease in cerebrospinal fluids merits further investigations. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Parasitology U5 - J;Article AV - English IS - 0166-6851 UR - ISI:000173460300005 L2 - Taenia solium;glycosphingolipid;cestode;antigenicity;serodiagnosis;ECHINOCOCCUS-MULTILOCULARIS; PROLIFERATIVE RESPONSE; GLYCOPROTEIN ANTIGENS; NEUTRAL GLYCOLIPIDS; TRYPANOSOMA-CRUZI; CERAMIDE; GLYCOSPHINGOLIPIDS; METACESTODES; INHIBITION; TAENIAEFORMIS SO - Molecular and Biochemical Parasitology 2002 ;119(1):33-42 5976 UI - 10948 AU - Lopez-Martin L AU - Lopez JA AU - Esteban C AU - Vazquez R AU - Raga A AU - Torrelles JM AU - Miranda LF AU - Meaburn J AU - Olguin L AD - Inst Astrofis Canarias, Tenerife 38200, SpainObserv Paris, DEMIRM, CNRS, UMR 8540, F-75014 Paris, FranceUNAM, Inst Astron, Ensenada 22860, Baja California, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Estudis Espacials Catalunya, Barcelona 08034, SpainInst Ciencias Espacio, Barcelona 08034, SpainCSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainUniv Manchester, Dept Astron, Macclesfield SK11 9DL, Cheshire, EnglandUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoLopez-Martin, L, Inst Astrofis Canarias, C Via Lactea S-N, Tenerife 38200, Spain TI - Unveiling the structure of the planetary nebula M 2-48: Kinematics and physical conditions AB - The kinematics and physical conditions of the bipolar planetary nebula M 2-48 are analysed from high and low dispersion long-slit spectra. Previous CCD narrow-band optical observations have suggested that this nebula is mainly formed by a pair of symmetric bow-shocks, an off-center semi-circular shell, and an internal bipolar structure. The bipolar outflow has a complex structure, characterised by a series of shocked regions located between the bright core and the polar tips. There is an apparent kinematic discontinuity between the bright bipolar core and the outer regions. The fragmented ring around the bright bipolar region presents a low expansion velocity and could be associated with ejection in the AGB-PN transition phase, although its nature remains unclear. The chemical abundances of the central region are derived, showing that M 2-48 is a type I planetary nebula (PN) MH - United Kingdom MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000176100000035 L2 - ISM : jets and outflows;hydrodynamics;shock waves;planetary nebulae : individual : M 2-48;LONG-SLIT SPECTROSCOPY; RECOMBINATION COEFFICIENTS; COLLIMATED OUTFLOWS; LINE-INTENSITIES; HE-I; BIPOLAR; MODELS; JETS; EVOLUTION; DISCOVERY SO - Astronomy & Astrophysics 2002 ;388(2):652-659 5977 UI - 10118 AU - Lopez-Sanchez P AU - Harris RC AD - Vanderbilt Univ, Nashville, TN 37235, USAIPN, Escuela Super Med, Mexico City 07738, DF, Mexico TI - Influence of blood glucose on prostaglandin synthesis in experimental diabetes mellitus MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757503172 SO - Journal of the American Society of Nephrology 2002 ;13():650A-650A 5978 UI - 10839 AU - Lopez-Sandoval H AU - Contreras R AU - Escuer A AU - Vicente R AU - Bernes S AU - Noth H AU - Leigh GJ AU - Barba-Behrens N AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, CU, Mexico City 04510, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Barcelona, Dept Quim Inorgan, E-08028 Barcelona, SpainICUAP, Ctr Quim, Puebla 72000, MexicoUniv Munich, Inst Inorgan Chem, D-81377 Munich, GermanyUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandBarba-Behrens, N, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan, CU, Mexico City 04510, DF, Mexico TI - Synthesis, crystal structure and magnetic properties of the triangulo-tricopper(II) complex [Cu-3(cpse)(3)(H2O)(3)]center dot 8.5H(2)O AB - The trinuclear copper(II) complex [Cu-3(cpse)(3)(H2O)(3)].8.5H(2)O has been obtained from mononuclear [Cu(Hcpse)(2)].H2O {H(2)cpse = N-[2-hydroxy-1(S)-methyl-(2)(S)-phenylethyl]-N-methylglycine, threo isomer} and crystallographically characterised. The structure of the compound consists of three Cu II atoms, each having distorted square-pyramidal geometry, linked by oxo-bridges to form an equilateral triangular array. The magnetic behaviour corresponds to an antiferromagnetically coupled triangular system, with J = -114.2 cm(-1). The EPR spectra at different temperatures have been determined. The analogue [Cu(Hceph)(2)].H2O (H(2)ceph = N-[2-hydroxy-1(S)-methyl-2(R)-phenylethyl] N- methylglycine), prepared from the erythro isomer, was obtained and characterised by X-ray crystallography MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000176467300012 L2 - TRINUCLEAR COPPER(II) COMPLEX; X-RAY STRUCTURES; ASCORBATE OXIDASE; TRIANGULAR ARRAY; ACTIVE-SITES; BEHAVIOR; DERIVATIVES; ZUCCHINI; CLUSTER; MODEL SO - Journal of the Chemical Society-Dalton Transactions 2002 ;(13):2648-2653 5979 UI - 9846 AU - Lopez-Sandoval R AU - Pastor GM AD - Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78210, MexicoUniv Toulouse 3, Phys Quant Lab, CNRS, F-31062 Toulouse, FranceLopez-Sandoval, R, Inst Potosino Invest Cient & Tecnol, Ave Venustiano Carranza 2425-A, San Luis Potosi 78210, Mexico TI - Density-matrix functional theory of strongly correlated lattice fermions AB - A density-functional theory (DFT) of lattice fermion models is presented, which uses the single-particle density matrix gamma(ij) as basic variable. A simple, explicit approximation to the interaction-energy functional W[gamma] of the Hubbard model is derived from exact dimer results, scaling properties of W[gamma] and known limits. Systematic tests on the one-dimensional chain show a remarkable agreement with the Bethe-ansatz exact solution for all interaction regimes and band fillings. New results are obtained for the ground-state energy and charge-excitation gap in two dimensions. A successful description of strong electron correlations within DFT is achieved MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000179080800057 L2 - HUBBARD-MODEL; REPRESENTABILITY PROBLEM; SUSCEPTIBILITY; TEMPERATURE; ELECTRONS SO - Physical Review B 2002 ;66(15): 5980 UI - 10811 AU - Lopez-Valdes HE AU - Garcia-Colunga J AU - Miledi R AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Queretaro 76001, MexicoUniv Calif Irvine, Lab Cellular & Mol Neurobiol, Dept Neurobiol & Behav, Irvine, CA 92697, USAMiledi, R, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Queretaro 76001, Mexico TI - Effects of clomipramine on neuronal nicotinic acetylcholine receptors AB - The action of the tricyclic antidepressant clomipramine on membrane currents elicited by acetylcholine was studied in Xenopus oocytes expressing neuronal alpha2beta4 nicotinic acetylcholine receptors. Clomipramine inhibited the acetylcholine responses rapidly and reversibly, with a similar IC50 when the oocytes were preincubated with clomipramine (1.3 +/- 0.2 muM) or when they were exposed simultaneously with acetylcholine and clomipramine (1.5 +/- 0.3 gM). The EC50 was 39.9 +/- 2.1 muM for acetylcholine alone and 65.7 +/- 3.6 muM for acetylcholine in the presence of 2 muM clomipramine. The inhibitory effect of clomipramine was weakly voltage-dependent, with an electric distance of similar to0.14. Moreover, clomipramine increased the rate of decay of currents elicited by acetylcholine. From all of these, we conclude that clomipramine reversibly and noncompetitively regulates neuronal alpha2beta4 nicotinic acetylcholine receptors by blocking the open receptor-channel complex at a site close to the extracellular vestibule of the channel. The actions of clomipramine on neuronal nicotinic acetylcholine receptors may play an important role in the treatment of mental depression and other mood disorders. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000176636300002 L2 - clomipramme;cholinergic - serotonergic interaction;nicotinic receptor modulation;Xenopus oocyte;mental depression;FLUOXETINE PROZAC; MONOAMINE UPTAKE; HUMAN BRAIN; BLOCKAGE; MODULATION; ANTIDEPRESSANTS; MUSCLE; DESMETHYLCLOMIPRAMINE; 5-HYDROXYTRYPTAMINE; PHARMACOLOGY SO - European Journal of Pharmacology 2002 ;444(1-2):13-19 5981 UI - 11270 AU - Lopez-Vidal Y AU - Palavecino E AU - Rossi F AD - GlaxoSmithKline, Mexico City 01020, DF, MexicoCatholic Univ Chile, Santiago, ChileHosp Emilio Ribas, Sao Paulo, BrazilLopez-Vidal, Y, GlaxoSmithKline, Av Insurgentes Sur 1605,Piso 20,Col San Jose Insu, Mexico City 01020, DF, Mexico TI - Prevalence of beta-lactamase production in H-influenzae isolated in Latin America in 1998-1999: results of the LASER study AB - The objective of this study was to assess the prevalence of P-lactamase production in Haemophilus influenzae clinical isolates obtained throughout Latin America and the West Indies in 1998-1999. Isolates were collected from 15 centres (seven countries), identified by standard methods and grouped by patient age. The overall prevalence of beta-lactamase production was 17.8% (270/1513 isolates). The prevalence of P-lactamase positive strains varied between countries, with the highest prevalence detected in Panama (23.4%, 29/124) and the lowest in the West Indies (10.5%, 4/38). beta-Lactamase-positive strains were more frequently isolated from children aged greater than or equal to3 years (22.0%) and from adults aged 65 years (26.5%). The high prevalence of beta-lactamase production found should be considered when choosing empirical antibiotic therapy where H. influenzae is suspected. (C) 2002 Published by Elsevier Science B.V. and International Society of Chemotherapy MH - Brazil MH - Chile MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0924-8579 UR - ISI:000175290600006 L2 - haemophilus influenzae;beta-lactamase positive;clinical isolates;antibiotic therapy;Latin America;West Indies;HAEMOPHILUS-INFLUENZAE; ANTIBIOTIC-RESISTANCE; ALEXANDER PROJECT; UNITED-STATES; SURVEILLANCE; AMOXICILLIN; SINUSITIS; CHILDREN SO - International Journal of Antimicrobial Agents 2002 ;19(3):201-205 5982 UI - 11439 AU - Lopez CP AU - Santoyo FM AU - Cywiak M AU - Barrientos B AU - Pedrini G AD - AC, Ctr Invest & Opt, Leon 37150, Gto, MexicoUniv Stuttgart, Inst Tech Opt, D-70569 Stuttgart, GermanySantoyo, FM, AC, Ctr Invest & Opt, Loma Bosque 115, Leon 37150, Gto, Mexico TI - New method for optical object derotation AB - A new optical method capable of measuring out-of-plane deformations of rotating objects based on the Fourier transform phase decoding technique is presented. Digital holography is used to test the method, which digitally derotates one of the holograms at its phase reconstruction stage to accurately remove object rotation fringes, uniquely rendering phase maps that quantitatively show the out-of-plane deformation. Commonly, object derotators are based on creating standing images of the rotating object under study. Typically, this is achieved by means of a rotating prism that has to be precisely synchronised with the object rotation. In contrast, this new method eliminates the need of using the expensive mechanical servomechanisms contained in the commercially available optomechanical derotators by using double pulsed digital holography in conjunction with Fourier optics. (C) 2002 Published by Elsevier Science B.V MH - Germany MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000174824200009 L2 - optical derotator;digital holography;INTERFEROMETRY; HOLOGRAPHY SO - Optics Communications 2002 ;203(3-6):249-253 5983 UI - 11451 AU - Lopez HF AU - Rodriguez AS AD - Univ Wisconsin, Dept Mat, Milwaukee, WI 53201, USACINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoLopez, HF, Univ Wisconsin, Dept Mat, POB 784, Milwaukee, WI 53201, USA TI - Aging effects on transformation temperatures of cold worked Ni-52 at.-%Ti shape memory alloy AB - In the present work, a Ni - 52Ti (at.-%) shape memory alloy was cold worked under compression at various plastic strain levels of 0 -20%. The cold worked alloys were then aged at temperatures in the range 723 - 873 K for I hour. It was found that aging promoted the precipitation of secondary phases in the cold worked specimens. The extent of precipitation was apparently related to the aging temperature and the amount of cold work. This, in turn, influenced the martensitic M-s, M-p, and M-f and austenitic A(s), A(p), and A(f) transformation temperatures. At temperatures between 823 and 873 K, there was no consistent trend in the transformation temperatures, owing to the inhomogeneous nature of the precipitation reaction. However, in cold worked specimens (>5%) aged at temperatures below 823 K, a depression in the peak austenitic temperatures A(p) was found. In addition, the martensite peak transformation temperatures M-p initially increased (0-5% cold working), but then decreased in all cases, with the effect being more pronounced at 723 - 773 K. Aging at 873 K where secondary phase precipitation was copious did not seem to have a significant influence on the exhibited transformation temperatures. Apparently, at this aging temperature, alloy recovery and defect annihilation counteracted most of the effects of the accumulated elastic and friction energy components of the thermoelastic transformation. MST/4915 MH - Mexico|Coahuila MH - USA PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0267-0836 UR - ISI:000174897300005 L2 - MARTENSITIC-TRANSFORMATION; THERMODYNAMIC ANALYSIS; NITI; PRECIPITATION; BEHAVIOR SO - Materials Science and Technology 2002 ;18(3):268-272 5984 UI - 10629 AU - Lopez J AU - Bell CI AU - Tremblay N AU - Dorais M AU - Gosselin A AD - Univ Laval, Dept Plant Sci, Hort Res Ctr, St Foy, PQ G1K 7P4, CanadaHort Res Int, Dept Soil Sci, Wellesbourne CV35 9EF, Warwick, EnglandAgr Canada, Res Stn, St Jean, PQ J3B 3E6, CanadaLopez, J, Inst Tecnol Agropecuario Oaxaca, Apartado Postal 273, Oaxaca 68000, Mexico TI - Uptake and translocation of sulphate in tomato seedlings in relation to sulphate supply AB - Uptake and translocation of (SO42-)-S-35 sulfate in intact tomato seedlings (Lycopersicon esculentum cv. Solairo) incubated in nutrient solutions containing four concentrations of sulfate were investigated. The S-35 fractions were measured in roots, stem, old leaves, and young leaves over a 24-hour period. At deficient and excessive sulfate levels, the instantaneous sulfate uptake (Phioc) in tomato seedlings was strongly influenced by the sulfate concentration in the rhizosphere. Increasing the sulfate concentration in the rhizosphere from 0.1 to 10.4 mM resulted in a proportional increase in net uptake into the whole seedling. The transport of sulfate from root to shoot (Phicx) was almost the same in seedlings incubated at both 20.8 mM sulfate and 10.4 mM sulfate. Young tomato plants can regulate sulfate influx from the cytoplasm to the xylem and the net uptake. The highest influx of SO42- from the external solution to the cytoplasm (Phioc) and the highest efflux (Phico) was observed at the highest sulfate concentrations (20.8 mM), indicating extensive recycling at the plasma membrane. Our results suggest for the greenhouse tomato a sulfate concentration of 10.4 mM in the nutrient solution, which allowed an optimum uptake. The data provided further information on the events associated with sulfur redistribution MH - Canada MH - United Kingdom MH - Mexico|Oaxaca PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000176964400009 L2 - Lycopersicon esculentum;sulphate;nutrient solution;sulphate supply;translocation;fluxes;SULFATE TRANSPORT; COMPARTMENTAL ANALYSIS; GLUTATHIONE GSH; TOBACCO PLANTS; NET UPTAKE; GROWTH; ROOTS SO - Journal of Plant Nutrition 2002 ;25(7):1471-1485 5985 UI - 10630 AU - Lopez J AU - Parent LE AU - Tremblay N AU - Gosselin A AD - Univ Laval, Dept Soil Sci & Agrifood Engn, Quebec City, PQ G1K 7P4, CanadaUniv Laval, Dept Plant Sci, Quebec City, PQ G1K 7P4, CanadaAgr Canada, Hort R&D Ctr, St Jean, PQ J3B 3E, CanadaInst Tecnol Agropecuario Oaxaca, Xoxocotlan 71230, Oaxaca, MexicoParent, LE, Univ Laval, Dept Soil Sci & Agrifood Engn, Paul Comtois Bldg, Quebec City, PQ G1K 7P4, Canada TI - Sulfate accumulation and calcium balance in hydroponic tomato culture AB - Sulfate accumulation may reduce calcium (Ca) activity in solution. The objective of this study was to relate solution and foliar nutrients for greenhouse tomato (Lycopersicon esculentum Mill. cv 'Trust') receiving nutrient solutions enriched with 0.1, 5.2, 10.4, or 20.8 mM of sulfate. Solution components were expressed as crude or free concentrations, which were row-centered log ratioed (RCLR). As an expression for nutrient balance, RCLR adjusts any nutrient value to the geometric mean of all nutrient levels. Solution and foliar datasets were related to each other using canonical correlations. RCLR produced greatest redundancy between the two datasets (R-2 = 0.640-0.654), and raw data, the smallest (R-2 = 0.498-0.513). Canonical analysis of RCLR-transformed free concentrations indicated a dominant sulfate effect and significant secondary effects clue to adjustment of the anion-cation balance in solution. Free sulfate concentration as RCLR explained 66% of the variation in foliar sulfur (S) and 71% of the variation in foliar Ca. The RCLR transformation should be further examined in relation with Ca imbalance and interactions in fruit crops MH - Canada MH - Mexico|Oaxaca PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000176964400015 L2 - PLANT-TISSUE; GROWTH SO - Journal of Plant Nutrition 2002 ;25(7):1585-1597 5986 UI - 9648 AU - Lopez JA AU - Chavez E AU - Moshinsky M AU - Borunda ME AD - Univ Texas, El Paso, TX 79968, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoEl Colegio Nacl, Mexico City, DF, MexicoUniv Autonoma Ciudad Juarez, Mexico City, DF, MexicoLopez, JA, Univ Texas, El Paso, TX 79968, USA TI - Proceedings of the IVth Latin American symposium on nuclear physics - 24-28 September 2001, Mexico D. F., Mexico - Editor's preface MH - Mexico|Distrito Federal MH - USA PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Editorial Material AV - English IS - 1219-7580 UR - ISI:000179714300001 SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2002 ;16(1-4):1-1 5987 UI - 10842 AU - Lopez LC AU - Patricio EFLR AU - Maile R AU - Morgan ED AD - Univ Keele, Chem Ecol Grp, Lennard Jones Lab, Sch Chem & Phys, Keele ST5 5BG, Staffs, EnglandColegio Frontera Sur, Mexico City 30700, DF, MexicoUniv Sao Paulo, Lab Abelhas, Inst Biociencias, BR-05508900 Sao Paulo, BrazilMorgan, ED, Univ Keele, Chem Ecol Grp, Lennard Jones Lab, Sch Chem & Phys, Keele ST5 5BG, Staffs, England TI - Secretions of stingless bees: cephalic secretions of two Frieseomelitta species AB - Gas chromatographic and mass spectrometric analysis of the volatile compounds in the mandibular glands of Frieseomelitta varia and the heads of Frieseomelitta silvestrii have revealed relatively simple or more complex mixtures of volatile oxygenated compounds. 2-Alkanols were found to be important components for both species. In F. varia the composition was essentially the same in samples from two widely separated areas and there were small differences between callows and mature, foraging bees. The first electroantennographic studies on stingless bees, using hexane extracts of heads of both species, have demonstrated a response in the workers' antennae to these, as well as to the pure compounds 2-heptanol and 2-nonanol. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Brazil MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Entomology;Physiology U5 - J;Article AV - English IS - 0022-1910 UR - ISI:000176513300007 L2 - Frieseomelitta varia;Frieseomelitta silvestrii;mandibular glands;2-ketones;2-alcohols;electroantennography;SCAPTOTRIGONA-POSTICA; HYMENOPTERA; APIDAE; WORKERS SO - Journal of Insect Physiology 2002 ;48(4):453-458 5988 UI - 9966 AU - Lopez M AU - Rojas JC AU - Vandame R AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoWilliams, T, Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, Spain TI - Parasitoid-mediated transmission of an iridescent virus AB - We examined the interaction between an invertebrate iridescent virus (IIV) isolated from Spodoptera frugiperda (J.E. Smith) and the solitary ichneumonid endoparasitoid Eiphosoma vitticolle Cresson. In choice tests, parasitoids examined and stung significantly more virus infected than healthy larvae, apparently due to a lack of defense reaction in virus infected hosts. Parasitoid-mediated virus transmission was observed in 100% of the female parasitoids that stung a virus infected host in the laboratory. Each female parasitoid transmitted the virus to an average (+/-SE) of 3.7 +/- 0.3 larvae immediately after stinging an infected larva. Caged field experiments supported this result; virus transmission to healthy larvae only occurred in cages containing infected hosts (as inoculum) and parasitoids (as vectors). The virus was highly detrimental to parasitoid development because of premature host death and lethal infection of the developing endoparasitoid. Female parasitoids that emerged from virus infected hosts did not transmit the virus to healthy hosts. We suggest that the polyphagous habits of many noctuid parasitoids combined with the catholic host range of most IIVs may represent a mechanism for the transmission of IIVs between different host species in the field. (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Chiapas MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000178837300003 L2 - Iridoviridae;virus transmission;endoparasitoid;Eiphosoma vitticolle;Spodoptera frugiperda;infection;survival;NUCLEAR POLYHEDROSIS-VIRUS; MICROPLITIS-CROCEIPES HYMENOPTERA; APANTELES-GLOMERATUS; GRANULOSIS-VIRUS; IRIDOVIRUS INFECTION; HOST INTERACTIONS; PIERIS-BRASSICAE; FALL ARMYWORM; LARVAE; LEPIDOPTERA SO - Journal of Invertebrate Pathology 2002 ;80(3):160-170 5989 UI - 11575 AU - Lopez MAA AU - Macdonald DC AD - Inst Tecnol Laguna, Dept Ingn Elect & Elect, Torreon, Coahuila, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Elect & Elect Engn, London, EnglandLopez, MAA, Inst Tecnol Laguna, Dept Ingn Elect & Elect, Torreon, Coahuila, Mexico TI - Analysis of synchronous reactances as a function of airgap MMF AB - Saturation modeling in synchronous machines normally involves assumptions in order to formulate proper mathematical models. A problem exists in the characterization of saturated synchronous reactances when they are represented as a function of total airgap ampere-turns. This paper presents a finite element numerical analysis of this saturation representation, and it is shown that it does not hold in all operating conditions. A steady-state model to predict field current and load angle is presented. It is based on the use of d-q mmf components. Two large turbo-generators of 13.8 kV, 150 MVA and 22 kV, 588 MVA are studied MH - United Kingdom MH - Mexico|Coahuila PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1532-5008 UR - ISI:000174588700002 L2 - synchronous machines;finite elements;parameters;saturation;steady state;MACHINES; SATURATION; MODEL SO - Electric Power Components and Systems 2002 ;30(4):345-359 5990 UI - 10770 AU - Lopez RH AU - Vidales AM AU - Zgrablich G AU - Rojas F AU - Kornhauser I AU - Cordero S AD - Univ Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaUniv Nacl San Luis, CONICET, RA-5700 San Luis, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoVidales, AM, Univ Nacl San Luis, Dept Fis, RA-5700 San Luis, Argentina TI - Determination of pore size distributions using the Dual Site-Bond Model: experimental evidence AB - In previous papers, we have described a suitable method to obtain pore size distributions for voids and necks using the Dual Site-Bond Model (DSBM) and Monte Carlo simulations. This method basically consists in the determination of the corresponding size distributions by using adsorption-desorption hysteresis data. Void size frequency functions are featured from the ascending curve. From the descending curve, we obtain a characteristic pressure value that will give us, via a quasi-universal curve, information about the neck size distribution function. In this work, we use our method to predict, using experimental hysteresis loops, the size distributions of several mesoporous samples. Once these functions are determined, we simulate the adsorption-desorption isotherms on a simple cubic network of voids and necks whose radii are sampled from the obtained size distributions. Comparison with experimental data is performed, drawing out fruitful conclusions and future perspectives based on the simplicity and predictive capability of the method. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000176724500033 L2 - adsorption;hysteresis;characterization;mesoporous solids;pore distributions;POROUS-MEDIA; PERCOLATION; ADSORPTION; SOLIDS; HYSTERESIS; SIMULATION SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2002 ;206(1-3):393-400 5991 UI - 11719 AU - Lopez TL AU - Moreno JA AU - Gomez R AU - Bokhimi X AU - Wang JA AU - Yee-Madeira H AU - Pecchi G AU - Reyes P AD - Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, MexicoUPALM, IPN, ESIQIE, Mexico City 07738, DF, MexicoConcepcion Univ, Fac Chem Sci, Dept Chem Phys, Concepcion, ChileLopez, TL, Univ Autonoma Metropolitana Iztapalapa, Dept Chem, POB 55-534, Mexico City 09340, DF, Mexico TI - Characterization of iron-doped titania sol-gel materials AB - Fe/TiO2 materials at 1 wt% Fe content have been prepared by the addition of aqueous solutions of FeCl2 to titanium n-tetrabutoxide using hydrochloric acid (pH 3) as a hydrolysis catalyst. The obtained gel was thermally treated at 200, 400, 600 and 800 degreesC. Characterization of the materials was performed by FTIR, UV-Vis, Mossbauer and X-ray powder diffraction. FTIR spectra of the calcined samples showed the presence of highly hydroxylated TiO2. The XRD patterns show the coexistance of brookite, anatase and rutile TiO2 phases in samples treated up to 600 degreesC. In the sample treated at 800 degreesC rutile was the only phase observed. UV-Vis spectroscopy revealed that the band gap E-g of the samples increased with increased thermal treatment temperature. Mossbauer spectroscopy showed the coexistance of Fe2+ and Fe3+ on the TiO2 samples treated at high temperatures MH - Chile MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000174034000054 L2 - CATALYSTS; ANATASE; TRANSFORMATION; HYDROLYSIS; ALKOXIDE; PHASES SO - Journal of Materials Chemistry 2002 ;12(3):714-718 5992 UI - 9718 AU - Lorea-Hernandez FG AU - Van Der Werff H AD - Inst Ecol, Xalapa 91000, Veracruz, MexicoMissouri Bot Garden, St Louis, MO 63166, USALorea-Hernandez, FG, Inst Ecol, AC,Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Three new species of Ocotea (Lauraceae) from southern Mexico AB - Lorea-Hernandez, E G. (Instituto de Ecologia, A. C., Apartado Postal 63, Xalapa, Veracruz, 91000, Mexico; loreaf@ecologia.edu.mx) and H. van der Werff (Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri, 63166-0299, U.S.A.; Henk.Vanderwerff@mobot.org). Three new species of Ocotea (Lauraceae) from southern Mexico. Brittonia 54: 145-153. 2002.-Three new species of Ocotea (O. disjuncta, O. iridescens, and O. rovirosae) from southern Mexico are described and illustrated. Ocotea disjuncta is related to the O. effusa group, while O. iridescens seems to be related to the O. heydeana group. The relationships of O. rovirosae are not clear MH - Mexico|Veracruz MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-196X UR - ISI:000179595500001 L2 - Mexico;Lauraceae;Ocotea SO - Brittonia 2002 ;54(3):145-153 5993 UI - 11727 AU - Lorenzo C AU - Serrano-Rios M AU - Martinez-Larrad MT AU - Gabriel R AU - Williams K AU - Gonzalez-Villalpando C AU - Stern MP AU - Hazuda HP AU - Haffner S AD - Univ Texas, Hlth Sci Ctr, Div Clin Epidemiol, Dept Med, San Antonio, TX 78284, USAUniv Madrid, Hosp San Carlos, Dept Internal Med, Madrid 3, SpainHosp La Princesa, Dept Clin Epidemiol, Madrid, SpainAmer British Cowdray Hosp, Ctr Studies Diabet, Mexico City, DF, MexicoLorenzo, C, Univ Texas, Hlth Sci Ctr, Div Clin Epidemiol, Dept Med, 7703 Floyd Curl Dr, San Antonio, TX 78284 USA TI - Prevalence of hypertension in Hispanic and non-Hispanic white Populations AB - Mexican nationals in Mexico City and Mexican Americans in San Antonio, Tex, have a lower adjusted prevalence of hypertension than San Antonio non-Hispanic whites, especially after adjusting for the greater obesity of San Antonio Mexican Americans. The concomitant examination of a new study from Spain may better explain the association of genetic and environmental factors with hypertension. Three population-based epidemiological studies conducted in Mexico City, Spain, and San Antonio, Tex, were available for comparisons. Hypertension was defined as systolic blood pressure greater than or equal to140 mm Hg, diastolic blood pressure greater than or equal to90 mm Hg, or the use of antihypertensive medications. The prevalence of hypertension was independently associated with age, body mass index, glucose tolerance, and alcohol consumption, with comparable degrees of relationship in all 4 populations. Relative to San Antonio non-Hispanic whites, an excess prevalence of hypertension was observed in Spaniards (odds ratio [OR], 1.53; 95% confidence interval [95% CI], 1.24 to 1.90). A deficit in hypertension prevalence was statistically significant in Mexican nationals (OR, 0.67; 95% CI, 0.53 to 0.85) and close to significance in San Antonio Mexican Americans (OR, 0.86; 95% CI, 0.71 to 1.03). Thus, obesity, educational attainment, type 2 diabetes, glucose tolerance, and marked alcohol consumption (greater than or equal to14 drinks/wk) do not fully explain the increased prevalence of hypertension in Spain and the lower prevalence of hypertension in Mexican-origin populations. Although we cannot conclude definitively that these differences are genetically driven, our results suggest no relationship between Spanish genetic admixture and the deficit in hypertension prevalence in Mexican-origin populations MH - Mexico|Distrito Federal MH - Spain MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0194-911X UR - ISI:000174045700003 L2 - clinical trials;diabetes;obesity;epidemiology;CARDIOVASCULAR RISK-FACTORS; MEXICAN-AMERICANS; SAN-ANTONIO; BLOOD-PRESSURE; ALCOHOL-CONSUMPTION; SPAIN; CITY; TEXAS SO - Hypertension 2002 ;39(2):203-208 5994 UI - 10080 AU - Louie JN AU - Chavez-Perez S AU - Henrys S AU - Bannister S AD - Univ Nevada, Mackay Sch Mines, Seismol Lab, Reno, NV 89557, USAUniv Nevada, Mackay Sch Mines, Dept Geol Sci, Reno, NV 89557, USAInst Mexicano Petr, Direcc Ejecutiva Explorac & Prod, Inst Mexicano Petr, Mexico City 07730, DF, MexicoInst Geol & Nucl Sci, Lower Hutt, New ZealandLouie, JN, Univ Nevada, Mackay Sch Mines, Seismol Lab, Reno, NV 89557 USA TI - Multimode migration of scattered and converted waves for the structure of the Hikurangi slab interface, New Zealand AB - Reflectivity imaging of local earthquake seisniograrns has revealed the structure of the Hikurangi subduction interface at the location of two strong earthquakes that occurred in 1990, The earthquakes originated within the continental plate of the North Island of New Zealand and below in the subducting Pacific slab. We used seismograms from 500 well-located events in two earthquake sequences recorded by a small temporary seismograph deployment to directly image the structure and multiphase reflectivity of the plate interface, Synthetic tests of the imaging method show the effects of the poor 3-d geometric coverage afforded by the seismometer array, Kirchhoff summation image sections computed from synthetics show accurate depth imaging of backscattering interfaces. Phase-converting interfaces imaged with forward-scattered waves are smeared by poor ray coverage to 5-km depth inaccuracy and are only imaged over a small range of their horizontal extent, From the data, we computed image sections for P-P, P-S, S-P and S-S scattering. We mitigated imaging artifacts due to poor ray coverage with an obliquity factor, an antialiasing criterion and enhancement by resampling statistics. Imaging used a sharply layered velocity model. We tested for the effects of imaging with first-arriving headwaves by imaging through smoothly varying velocity models. For our ray geometry, early-arrival headwaves contribute little to the images. The plate interface appears as a 3-5-km thick P-P and possibly S-S backscatterer with 5degrees NW dip, offset 5 km down-to-the-NW above a normal fault in the slab. When illuminated from below, a wedge of the interface on the downdip side of the slab fault forms a very prominent P-P forward scatterer. The edges of the wedge forward-scatter some S-P and S-S energy, but an order of magnitude less than the P-P forward scattering. The imbalances between forward scattering of P and S energy suggest a wedge of subducted sediment retaining significant porosity but with rigidity close to that of surrounding rocks. (C) 2002 Elsevier Science BA. All rights reserved MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000178396500015 L2 - subduction;seismic reflection;migration;imaging;shear wave;thrust fault;SOUTHERN CALIFORNIA; SHALLOW SUBDUCTION; CONVERGENT MARGIN; PLATE BOUNDARY; NORTH-ISLAND; EARTHQUAKE; FAULT; ZONE; SEISMOGRAMS; REFLECTION SO - Tectonophysics 2002 ;355(1-4):227-246 5995 UI - 9702 AU - Loukianov AG AU - Castillo-Toledo B AU - Dodds S AD - IPN, Ctr Invest & Estudios Avanzados, Guadalajara 44550, Jalisco, MexicoUniv E London, Dept Elect & Elect Engn, Dagenham RM8 2AS, Essex, EnglandCastillo-Toledo, B, IPN, Ctr Invest & Estudios Avanzados, Apdo Postal 31-438,Plaza Luna, Guadalajara 44550, Jalisco, Mexico TI - Robust stabilization of a class of uncertain system via block decomposition and VSC AB - In this paper, a block decomposition procedure for sliding mode control of a class of nonlinear systems with matched and unmatched uncertainties, is proposed. Based on the nonlinear block control principle, a sliding manifold design problem is divided into a number of sub-problems of lower dimension which can be solved independently. As a result, the nominal parts of the sliding mode dynamics is linearized. A discontinuous feedback is then used to compensate the matched uncertainty. Finally, a step-by-step Lyapunov technique and a high gain approach is applied to obtain hierarchical fast motions on the sliding manifolds and to achieve the robustness property of the closed-loop system motion with respect to unmatched uncertainty. Copyright (C) 2002 John Wiley Sons, Ltd MH - United Kingdom MH - Mexico|Jalisco PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000179655500004 L2 - nonlinear systems;uncertain dynamic systems;decomposition methods;sliding mode control;DYNAMICAL-SYSTEMS; CONTROL PRINCIPLE SO - International Journal of Robust and Nonlinear Control 2002 ;12(15):1317-1338 5996 UI - 10936 AU - Louzada ES AU - del Rio HS AU - Xia D AU - Moran-Mirabal JM AD - Texas A&M Univ, Kingsville Citrus Ctr, Weslaco, TX 78596, USACtr Biotecnol, Inst Tecnol Estudios Super Monterrey, Monterrey, NL, MexicoLouzada, ES, Texas A&M Univ, Kingsville Citrus Ctr, 312 N Int Blvd, Weslaco, TX 78596 USA TI - Preparation and fusion of Citrus sp microprotoplasts AB - Large-scale production of microprotoplasts from 'Ruby Red' grapefruit (Citrus paradisi Macf.) and from the Citrus L. sp. relative Swinglea glutinosa (Blanco) Merr., was performed after treatment of suspension cells with APM. An average of 75.2% of the microprotoplasts contained a single chromosome, followed by 17.1% with two, 4.6% with three, and 2.0% with four. Only 1.1% had more than five chromosomes. Maximum chromosome number observed was eight and the average yield was 2 x 106 of total microprotoplasts per gram of suspension cells. Flow cytometry analysis confirmed low DNA content. The polyethylene glycol fusion method was used to fuse microprotoplasts from 'Ruby Red' grapefruit with protoplasts of 'Succari' sweet orange [Citrus sinensis (L.) Osbeck], and microprotoplasts from S. glutinosa with protoplasts from sour orange (C. aurantium L.). Embryos or suspension cells from the recipient species with a few additional chromosomes were obtained; however, embryogenesis of the fusion products was reduced or inhibited. Chemical name used: amiprophos-methyl (APM) MH - Mexico|Nuevo Leon MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Horticulture U5 - J;Article AV - English IS - 0003-1062 UR - ISI:000176210800004 L2 - citrus;chromosome transfer;amiprophos-methyl;MMCT;AGROBACTERIUM-MEDIATED TRANSFORMATION; PARTIAL GENOME TRANSFER; COAT PROTEIN GENE; SOMATIC HYBRIDIZATION; NICOTIANA-PLUMBAGINIFOLIA; CULTIVAR IMPROVEMENT; INTEGRAL COMPONENT; AMIPROPHOS-METHYL; TRISTEZA VIRUS; PLANTS SO - Journal of the American Society for Horticultural Science 2002 ;127(4):484-488 5997 UI - 10379 AU - Lozada-Cassou M AU - Jackson G AD - Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn, London SW7 2BY, EnglandUniv Autonoma Metropolitana, Dept Phys, Mexico City, DF, MexicoInst Mexicano Petr, Programa Simulac Mol, Mexico City, DF, MexicoJackson, G, Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn, Prince Consort Rd, London SW7 2BY, England TI - Applied Statistical Physics Molecular Engineering Conference - Cancun, Mexico 23-27 July 2001 - Foreword MH - United Kingdom MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Editorial Material AV - English IS - 0026-8976 UR - ISI:000177615400001 SO - Molecular Physics 2002 ;100(18):2909-2909 5998 UI - 9573 AU - Lozano A AU - Storchi G AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Roma La Sapienza, Dipartimento Stat Probabil & Stat Applicate, I-00185 Rome, ItalyLozano, A, Univ Nacl Autonoma Mexico, Inst Ingn, Apdo Postal 70-472,Coyoacan, Mexico City 04510, DF, Mexico TI - Shortest viable hyperpath in multimodal networks AB - In this work both the multimodal hypergraph and the viable hyperpath conceptualizations are presented. The shortest viable hyperpath problem (SVHP) in a multimodal transportation network is defined. We consider a label correcting approach to find the shortest viable hyperpath from an origin to a destination, for different values of the upper limit of modal transfers. Such hyperpaths compose a Pareto-optimal set, from where the user could choose the "best" hyperpath according to personal preferences with respect to the expected travel time and the upper limit of modal transfers. An application example on a multimodal network is presented. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Civil;Operations Research & Management Science;Transportation;Transportation Science & Technology U5 - J;Article AV - English IS - 0191-2615 UR - ISI:000179686600001 L2 - GEOGRAPHIC INFORMATION-SYSTEM; FREIGHT TRANSPORTATION; PATH ALGORITHM; FRAMEWORK; DESIGN; MODELS SO - Transportation Research Part B-Methodological 2002 ;36(10):853-874 5999 UI - 9667 AU - Lu C AU - Han MH AU - Guevara-Garcia A AU - Fedoroff NV AD - Penn State Univ, Dept Biol, University Pk, PA 16802, USAPenn State Univ, Life Sci Consortium, University Pk, PA 16802, USADelaware Biotechnol Inst, Newark, DE 19711, USAPenn State Univ, Dept Biochem & Mol Biol, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoFedoroff, NV, Penn State Univ, Dept Biol, University Pk, PA 16802, USA TI - Mitogen-activated protein kinase signaling in postgermination arrest of development by abscisic acid AB - Abscisic acid (ABA) mediates plant responses to environmental stress, particularly to water status. During germination, the embryo emerges from dormancy as the ABA concentration declines. Exposure to exogenous ABA during germination arrests development rapidly, but reversibly, enabling seedlings to withstand early water stress without loss of viability. Postgermination proteolytic degradation of the essential AB15 transcription factor is interrupted by perception of an increase in ABA concentration, leading to AB15 accumulation and reactivation of embryonic genes. Making use of the ABA-hypersensitive hyl1 mutant of Arabidopsis, we show that the ABA signal is transmitted to the transcriptional apparatus through mitogenactivated protein kinase signaling MH - Mexico|Morelos MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 47 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000179530000099 L2 - AGROBACTERIUM-MEDIATED TRANSFORMATION; OXIDATIVE STRESS; MAP KINASE; ARABIDOPSIS-THALIANA; BINDING-PROTEIN; PHOSPHATASE 2C; GUARD-CELLS; PLANTS; TRANSDUCTION; RESPONSES SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(24):15812-15817 6000 UI - 5330 AU - Luca F AD - UNAM, Math Inst, Morelia 58089, Michoacan, MexicoTata Inst Fundamental Res, Sch Math, Bombay 400005, Maharashtra, IndiaLuca, F, UNAM, Math Inst, Campus Morelia,Ap 61-3 Xangari, Morelia 58089, Michoacan, Mexico TI - On integers which are not differences of two powers MH - India MH - Mexico|Michoacan PB - LONDON: UNIV COLLEGE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-5793 UR - ISI:000221830800021 SO - Mathematika 2002 ;49(97-98):231-243 6001 UI - 10053 AU - Luca F AU - Walsh PG AD - UNAM, Inst Matemat, Morelia, Michoacan, MexicoUniv Ottawa, Dept Math, Ottawa, ON K1N 6N5, CanadaLuca, F, UNAM, Inst Matemat, Campus Morelai,Ap Postal 61-3 Xangari,CP 50 089, Morelia, Michoacan, Mexico TI - The product of like-indexed terms in binary recurrences AB - In recent work by Hajdu and Szalay, Diophantine equations of the form (a(k) -1)(b(k) - 1) = x(2) were completely solved for a few pairs (a,b). In this paper, a general finiteness theorem for equations of the form u(k)nu(k) = x(11) is proved, where u(k) and nu(k) are terms in certain types of binary recurrence sequences. Also, a unified computational approach for solving equations of the type (a(k) - 1) (b(k) - 1) = x(2) is described, and this approach is used to completely solve such equations for almost all (a,b) in the range 1 < a < b less than or equal to 100. In the final section of this paper, it is shown that the abc conjecture implies much stronger results on these types of Diophantine problems. (C) 2002 Elsevier Science (USA) MH - Canada MH - Mexico|Michoacan PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0022-314X UR - ISI:000178617300009 L2 - DIOPHANTINE EQUATIONS SO - Journal of Number Theory 2002 ;96(1):152-173 6002 UI - 11063 AU - Lucach SO AU - Bowler BFJ AU - Frewin N AU - Larter SR AD - Univ Newcastle Upon Tyne, NRG, Postgrad Inst, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandInst Mexicano Petr, Mexico City 07730, DF, MexicoPetr Dev Oman LLC, Dept XGS 2, Muscat, OmanLarter, SR, Univ Newcastle Upon Tyne, NRG, Postgrad Inst, Drummond Bldg, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England TI - Variation in alkylphenol distributions in a homogenous oil suite from the Dhahaban petroleum system of Oman AB - As part of a study to determine the effect of migration processes on the abundance and distribution of alkylphenols in crude oils, we have analysed a homogeneous suite of 15 oils from the Dhahaban petroleum system in Oman that lies along a secondary migration pathway in a foreland basin setting. Geochemical parameters based on aliphatic hydrocarbon biomarkers and aromatic hydrocarbon concentrations and ratios suggest a similar maturity and source facies for the oils, despite the wide variation in relative petroleum migration distance (up to c. 260 km), Given the similarity in source facies and maturity characteristics of the oils, we conclude that the observed variations in alkylphenol concentrations in this sample suite are controlled mainly by secondary migration processes. The majority of the oils are not degraded and in these samples we observe a significant decrease in total alkylphenol concentration within the first c. 50 km relative migration distance, Supporting similar studies on North Sea petroleum systems and suggesting that alkylphenols may be Useful as geotracers over shorter migration distances. There is little evidence of systematic migration distance-related variation in the relative abundance of individual alkylphenol isomers or homologue groups. The alkylphenol distributions in two biodegraded oils in the sample suite, both from relatively shallow reservoirs. were dominated almost completely by phenol. and this is discussed in the context of the microbial production and alteration of phenols, and the influence of water-washing on the content and distribution of phenols in crude oils. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Oman PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0146-6380 UR - ISI:000175737200005 L2 - CRUDE OILS; AROMATIC-HYDROCARBONS; ANAEROBIC DEGRADATION; DISTRIBUTION PATTERN; ORGANIC-MATTER; MATURITY; TRANSFORMATION; IDENTIFICATION; BIODEGRADATION; TOLUENE SO - Organic Geochemistry 2002 ;33(5):581-594 6003 UI - 9180 AU - Ludke E AU - Migenes V AU - Balasubramanyam R AU - Cassol NC AD - Univ Fed Santa Maria, CCNE DEFIS LARIE, BR-97150900 Santa Maria, RS, Brazil. Univ Guanajuato, Dept Astron, Mexico City 36000, DF, Mexico. Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia TI - A 3mm SiO maser survey in the galactic bulge region AB - We have made a blind survey of SiO masers, of the J=2-1 v = 1 transition, toward 106 bright OH/IR stars which have been previously detected in the OH main line at 1662 MHz with the ATCA in the galactic bulge by Sevenster et al (2000) and in the galactic disk at J=1-0 (v = 1-2) line by Miyazaki (2001). A comparison with published data shows that new SiO masers are detected for OH/IR stars in the galactic center, suggesting that those stars are undergoing strong mass loss with dense circumstellar envelopes with apparent angular sizes far smaller than the OH maser shell as obtained by interferometric observations. At the moment, our detection rate is about 23% and it may be increased when the project is completed MH - Australia MH - Brazil MH - Mexico|Guanajuato T3 - COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLESIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBW16P AV - English IS - 0074-1809 UR - ISI:000181054300062 SO - 2002 ;(206):294-296 6004 UI - 9889 AU - Luengo WD AU - Martinez AR AU - Lopez RO AU - Basalo CM AU - Rojas-Atencio A AU - Quintero M AU - Borjas L AU - Morales-Machin A AU - Ferrer SG AU - Bernal LP AU - Canizalez-Tarazona J AU - Pena J AU - Luengo JD AU - Hernandez JC AU - Chang JC AD - Univ Zulia, Unidad Genet Med, Fac Med, Maracaibo 4011, VenezuelaUniv Zulia, Dept Pediat, Fac Med, Maracaibo 4011, VenezuelaUniv Zulia, Fac Med, Residencia Postgrad Pediat, Maracaibo 4011, VenezuelaUniv Autonoma Nuevo Leon, Fac Med, Dept Bioquim, Monterrey, MexicoLuengo, WD, Univ Zulia, Unidad Genet Med, Fac Med, Apartado 15-374, Maracaibo 4011, Venezuela TI - Del(1)(q23) in a patient with Hutchinson-Gilford progeria AB - A 9-year-old patient with the classical clinical picture of Hutchinson-Gilford progeria (HGP) is described. The karyotype shows a 46,XY,del(1)(q23) constitution. Our findings suggest that the interval 1q23 may play a roll in the etiology of HGP. A perturbation in glycosylation in connective tissue has been demonstrated in patients with this condition. This abnormality may be due to a defect in the UDP-galactose:beta-N-acetylglucosamina-beta-1,4-galactosyltransferase 3 (B4GALT3) gene that has been mapped in the interval 1q21-23. The cytogenetical analyses of this patient suggest that the B4GALT3 gene could be involved in the pathogenesis of HGP. (C) 2002 Wiley-Liss, Inc MH - Mexico|Nuevo Leon MH - Venezuela PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 11 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000179171500014 L2 - Hutchinson-Gilford progeria syndrome;karyotype;candidate genes SO - American Journal of Medical Genetics 2002 ;113(3):298-301 6005 UI - 11513 AU - Lugo JE AU - Lopez HA AU - Chan S AU - Fauchet PM AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Rochester, Dept Elect & Comp Engn, Rochester, NY 14627, USALugo, JE, McGill Univ, Dept Elect & Comp Engn, Montreal, PQ H3A 2A7, Canada TI - Porous silicon multilayer structures: A photonic band gap analysis AB - A photonic model for freshly anodized porous silicon multilayer structures is presented. The photonic structures are composed of alternating high and low dielectric function porous silicon layers. The model takes into account the presence of silicon dioxide and its lattice expansion in the porous structure. We work with oxidized structures and our results fit completely the experimentally measured optical shift. (C) 2002 American Institute of Physics MH - Canada MH - Mexico|Morelos MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000174666600029 L2 - LIGHT-EMITTING DEVICES; OPTICAL-PROPERTIES; MACROPOROUS SILICON; POROSITY SUPERLATTICES; MU-M; CRYSTALS; SURFACE SO - Journal of Applied Physics 2002 ;91(8):4966-4972 6006 UI - 10761 AU - Luisi PL AU - Oberholzer T AU - Lazcano A AD - Swiss Fed Inst Technol, Inst Polymers, CH-8092 Zurich, SwitzerlandUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoLuisi, PL, Swiss Fed Inst Technol, Inst Polymers, Univ Str 6, CH-8092 Zurich, Switzerland TI - The notion of a DNA minimal cell: A general discourse and some guidelines for an experimental approach AB - The staggering complexity of even the simplest living microorganisms on Earth elicits the question of whether such complexity is really necessary for life, or whether, instead, the basic functions of cellular life (homeostasis, reproduction, and evolution) can be, in principle, expressed by much simpler unicellular entities that contain only a few dozen genes. This suggests the notion of a minimal cell, i.e., the (potential) cell having the minimal sufficient molecular components to be defined as alive. The conceptual and practical implementation of such minimal cell(s) for our understanding of the notion of life, and also for possible biotechnological applications, is discussed here MH - Mexico|Distrito Federal MH - Switzerland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0018-019X UR - ISI:000176722300018 L2 - CRYOTRANSMISSION ELECTRON-MICROSCOPY; AUTOPOIETIC SELF-REPRODUCTION; COMPLETE GENOME SEQUENCE; FATTY-ACID VESICLES; GIANT VESICLES; ENZYMATIC-SYNTHESIS; LIPID VESICLES; LIPOSOMES; LIFE; RNA SO - Helvetica Chimica Acta 2002 ;85(6):1759-1777 6007 UI - 11318 AU - Luna-Acosta GA AU - Mendez-Bermudez JA AU - Seba P AU - Pichugin KN AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Hradec Kralove, Dept Phys, Hradec Kralove, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicLV Kirenskii Inst Phys, Krasnoyarsk 660036, RussiaLuna-Acosta, GA, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Classical versus quantum structure of the scattering probability matrix: Chaotic waveguides AB - The purely classical counterpart of the scattering probability matrix (SPM) \S-n,S-m\(2) of the quantum scattering matrix S is defined for two-dimensional quantum waveguides for an arbitrary number of propagating modes M. We compare the quantum and classical structures of \S-n,S-m\(2) for a waveguide with generic Hamiltonian chaos. It is shown that even for a moderate number of channels, knowledge of the classical structure of the SPM allows us to predict the global structure of the quantum one and, hence, understand important quantum transport properties of waveguides in terms of purely classical dynamics. It is also shown that the SPM, being an intensity measure, can give additional dynamical information to that obtained by the Poincare maps MH - Czech Republic MH - Mexico|Puebla MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000175146600039 L2 - SEMICLASSICAL CROSS-SECTION; CONDUCTANCE FLUCTUATIONS; S-MATRIX; BALLISTIC-TRANSPORT; WEAK-LOCALIZATION; CAVITIES; COLLISIONS; MICROSTRUCTURES; DENSITY; CHANNEL SO - Physical Review e 2002 ;65(4): 6008 UI - 10369 AU - Luna E AU - Cordova A AU - Medina A AU - Higuera FJ AD - Inst Mexicano Petr, Programa YNF, Grp Medios Porosos & Granulados, Mexico City 07730, DF, MexicoETS Ingn Aeronaut, Madrid, SpainMedina, A, Inst Mexicano Petr, Programa YNF, Grp Medios Porosos & Granulados, Mexico City 07730, DF, Mexico TI - Convection in a finite tilted fracture in a rock AB - A constant temperature difference is imposed between the two bases of a horizontal solid slab containing a fluid-filled fracture that crosses the slab at an angle to the horizontal. The distortion of the vertical thermal gradient due to the presence of the fracture induces a natural convection flow in the fracture, which is analyzed along with the temperature distributions in the solid and in the fluid, in the limit of small Rayleigh numbers. The numerical and analytical results compare favorably with the temperatures and velocities measured experimentally. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000177601600021 L2 - convection and heat transfer;heat transfer in porous media;NATURAL-CONVECTION; DISPERSION SO - Physics Letters A 2002 ;300(4-5):449-455 6009 UI - 10444 AU - Lunetta RS AU - Alvarez R AU - Edmonds CM AU - Lyon JG AU - Elvidge CD AU - Bonifaz R AU - Garcia C AD - US EPA, Natl Exposure Res Lab, Res Triangle Pk, NC 27711, USAUniv Nacl Autonoma Mexico, Inst Invest Math Aplicadas & Sistemas, Mexico City 04510, DF, MexicoUS EPA, Nat Exposure Res Lab, Las Vegas, NV 89119, USANOAA, NESDIS, Natl Geophys Data Ctr, Boulder, CO 80303, USAUniv Nacl Autonoma Mexico, Direcc Gen Serv Comp Acad, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoLunetta, RS, US EPA, Natl Exposure Res Lab, MD-56, Res Triangle Pk, NC 27711 USA TI - NALC/Mexico land-cover mapping results: implications for assessing landscape condition AB - An inventory of land-cover conditions throughout Mexico was performed using North American Landscape Characterization ( NALC) Landsat Multi-Spectral Scanner (MSS) 'triplicate' images, corresponding to the 1970s, 1980s and 1990s epoch periods. The equivalent of 300 image scenes were analysed using an unsupervised classification approach by a consortium of 13 universities and institutes across Mexico. Accuracy assessments were conducted to validate the 1970s and 1990s results using independent land-cover classifications (reference data) developed from the interpretation of 1: 100 000-scale aerial photography collected in 1973, and Landsat Thematic Mapper (TM) imagery collected between 1990 and 1993. The 1980s epoch classifications were compared with both reference datasets, collectively. The relative accuracy of the classifications results were 60% for both the 1970s and 1990s epoch and 67% for the 1980s epoch. The significantly ( p= 0.05) higher accuracy for the 1980s epoch ( 67%) was thought to be an aberration resulting from the combined application of two reference datasets, resulting in a random compensation of reference data error. Significantly different ( p= 0.05) results were documented for a subset of Mexico's major habitat regions. Desert and xeric shrublands were most accurate (74%), followed by conifer and xeric dominated habitats (64%) and other mixed habitats (54%). Scenes representing the highest accuracies ( 15 percentile) almost exclusively represented desert and xeric shrub habitat regions, and the lowest (17 percentile) represented predominantly mixed habitat regions. Significant differences among the 13 member consortium universities and institutes were attributed to habitat region assignments. Results indicated that large area spectral based land-cover categorizations should be stratified and processed on a habitat or ecoregion basis. Results also suggested that any future land-cover conversion analysis for Mexico would probably best be accomplished using a post-classification approach, based on major habitat regions, rather than on a scene-by-scene or pixel-wise basis MH - USA MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 6 U4 - Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0143-1161 UR - ISI:000177446900002 L2 - CONTERMINOUS UNITED-STATES; HABITAT; ISSUES SO - International Journal of Remote Sensing 2002 ;23(16):3129-3148 6010 UI - 9739 AU - Luque-Garcia JL AU - Soto-Ayala R AU - de Castro MDL AD - Univ Cordoba, Dept Analyt Chem, E-14071 Cordoba, SpainUNAM, Fac Engn, Div Basic Sci, Mexico City, DF, Mexicode Castro, MDL, Univ Cordoba, Dept Analyt Chem, Campus Rabanales,Annex C-3, E-14071 Cordoba, Spain TI - Determination of the major elements in homogeneous and heterogeneous samples by tandem laser-induced breakdown spectroscopy-partial least square regression AB - The tandem laser-induced breakdown spectroscopy-partial least square regression (LIBS-PLS) was applied for the analysis of both, a smelting product from a noble metal ore (as example of a homogeneous sample) and a calcareous rock from a Maya building (as a heterogeneous sample). The method was designed for the analysis of both samples without perceptible deterioration of the pieces, by monitoring the emission lines of the major elements present in each sample while subjecting the pieces to a number of laser shots. The results obtained, as well as the precision provided by the LIBS-PLS method, were statistically compared with those obtained by graphite furnace-atomic absorption spectroscopy (for Ag and Cu) and flame atomic emission spectroscopy (for Ca), showing good agreement between methods. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0026-265X UR - ISI:000179488500011 L2 - laser-induced breakdown spectroscopy;partial least square regression;graphite furnace-atomic absorption spectroscopy;flame atomic emission spectroscopy;QUANTITATIVE-ANALYSIS; SPECTROMETRY; EMISSION; ALLOYS SO - Microchemical Journal 2002 ;73(3):355-362 6011 UI - 9226 AU - Luque SNP AU - urioles-Gamboa D AD - Inst Politecn Nacl, Ctr Interdisciplinaria Ciencias Marinas, La Paz 23096, Baja California, MexicoLuque, SNP, CNRS, UPR 1934, Ctr Etud Biol Chize, F-79360 Villiers En Bois, France TI - Estimation of body volume and body density in California sea lion pups AB - Body volume was measured directly by the water displacement method and using three different geometric models, consisting of a series of cones and truncated cones, in California sea lion (Zalophus californianus) pups from the Gulf of California. Volume is required for the estimation of density, an indicator of the ratio of fat to lean mass. A model consisting of two cones and four truncated cones predicted body volume with greatest accuracy (volume=1.11+1.06 x estimated volume, r(2)=0.90, p<0.001, SEE=0.673, N=274). This model, however, was not adequate to estimate absolute pup body density (mass to volume ratio), as it yielded values poorly correlated with observed body density (r=0.14, P=0.02). However, the regression line of mass on volume indicated that density decreased with volume, so the mass to volume ratio is a biased estimate of density and is not appropriate for comparing whole body density among sea lion pups. The direct analysis of the relationship between body mass and body volume (observed or estimated) through analysis of covariance provided a better tool to compare the relative density among pups of different sex, populations, or born in different years. The results from such analyses are consistent with previous evidence of sex and age effects on body composition MH - France MH - Mexico|Baja California PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000180834800015 L2 - HYDROGEN ISOTOPE-DILUTION; ARCTOCEPHALUS-GAZELLA; CONDITION INDEXES; DIVING BEHAVIOR; SMALL MAMMALS; SIZE; PERCENTAGES; METABOLISM; BUOYANCY SO - Journal of the Marine Biological Association of the United Kingdom 2002 ;82(6):1019-1022 6012 UI - 11043 AU - Luridiana V AU - Cervino M AU - Binette L AD - European So Observ, D-8046 Garching, GermanyCSIC, Inst Astrofis Andalucia, Granada, SpainMax Planck Inst Extraterr Phys, D-8046 Garching, GermanyUNAM, Inst Astron, Mexico City, DF, MexicoLuridiana, V, European So Observ, Karl Schwarzschild Str 2, D-8046 Garching, Germany TI - Can stellar winds account for temperature fluctuations? The case of NGC 2363 MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000175921200069 L2 - HII regions;ISM : individual (NGC 2366, NGC 2363);stars : clusters;MODELS SO - Astrophysics and Space Science 2002 ;281(1-2):323-324 6013 UI - 11342 AU - Lux SA AU - Vilardi JC AU - Liedo P AU - Gaggl K AU - Calcagno GE AU - Munyiri FN AU - Vera MT AU - Manso F AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, ArgentinaColegio Frontera Sur, Tapachula, Chiapas, MexicoAgr Univ Warsaw, Warsaw, PolandIAEA, A-2444 Seibersdorf, AustriaINTA, CICA, Inst Genet Ewald Favret, RA-1712 Castelar, ArgentinaLux, SA, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, Argentina TI - Effects of irradiation on the courtship behavior of medfly (Diptera, Tephritidae) mass reared for the sterile insect technique AB - The effects of routine irradiation of the mass-reared males of the medfly, Ceratitis capitata on their mating performance were re-evaluated. Male courtship behavior was observed and quantified both in laboratory (video recording cages) and field cage conditions. For the experiments, samples of the strains routinely mass-reared for SIT operations at Seibersdorf, Austria; Mendoza, Argentina and Metapa, Mexico, were used. No major qualitative differences were found in the courtship pattern between irradiated and non-irradiated males. However, the results revealed that the process of routine irradiation as commonly used in the mass rearing facilities at the time of the experiments, reduces the mating performance of the sterilized males nearly two-fold. A whole range of quantitative differences between the irradiated and non-irradiated males were detected and described, and their implications for the efficiency of SIT operations are discussed. In contrast, partial sterilization with low doses of radiation did not affect the mating competitiveness of the treated males to a noticeable degree. In view of the results obtained, and due to the current wider use of "male-only" strains in SIT operations, a re-evaluation of the sterilization strategy and irradiation doses for males used in SIT is recommended MH - Argentina MH - Austria MH - Mexico|Chiapas MH - Poland PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000175200200012 L2 - medfly;Ceratitis capitata;mating behavior;courtship;sterilization;irradiation;SIT;MEDITERRANEAN FRUIT-FLY; SEXUAL COMPETITIVENESS; GAMMA-IRRADIATION; MATING SUCCESS; FLIES DIPTERA; MALES; NITROGEN; FITNESS; WILD SO - Florida Entomologist 2002 ;85(1):102-112 6014 UI - 11343 AU - Lux SA AU - Munyiri FN AU - Vilardi JC AU - Liedo P AU - Economopoulos A AU - Hasson O AU - Quilici S AU - Gaggl K AU - Cayol JP AU - Rendon P AD - Agr Univ Warsaw, Warsaw, PolandUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, ArgentinaColegio Frontera Sur, Tapachula, Chiapas, MexicoUniv Crete, Iraklion 71409, Crete, GreeceFLHOR, CIRAD, Stn Bassin Martin, St Pierre 97455, ReunionIAEA, A-2444 Seibersdorf, AustriaIAEA, Tech Cooperat Div, W Asia Sect, A-1400 Vienna, AustriaUS Embassy, PPQ, APHIS, USDA,Guatemala Medfly Stn,Unit 3319, Guatemala City 340303319, GuatemalaLux, SA, Int Ctr Insect Physiol & Ecol, POB 30 772, Nairobi, Kenya TI - Consistency in courtship pattern among populations of medfly (Diptera : Tephritidae): Comparisons among wild strains and strains mass reared for sit operations AB - The objective of the study was to compare courtship behavior of various wild and mass reared medfly strains, in order to document the degree of diversity in courtship behavior among medfly populations and to assess its implications for strategy of application of the Sterile Insect Technique. Recordings of medfly courtship behavior were collected from several locations world-wide using a standard protocol. Qualitative and quantitative analysis of the collected behavioral materials was conducted. No major differences were found among the strains both in male and female behavioral repertoire, which indicates general lack of behavioral incompatibility among the strains studied. However, the analysis revealed several qualitative and quantitative differences in courtship details among locations. The females from Madeira strain were more "choosy" then those from other strains, rejecting male courtship most frequently in spite of the fact that the males from this strain displayed their courtship activities in the most expressed manner. It has been suggested, therefore, that development of an efficient strain for world-wide application shall be based on the most competitive strains (such as Madeira strain), and only individuals with the most pronounced pattern of male courtship should be selected as founders MH - Argentina MH - Austria MH - Greece MH - Guatemala MH - Kenya MH - Mexico|Chiapas MH - Poland MH - Reunion PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000175200200013 L2 - Ceratitis capitata;Mediterranean fruit fly;medfly;mating behavior;courtship;strain comparisons;MEDITERRANEAN FRUIT-FLY; FITNESS; SUCCESS SO - Florida Entomologist 2002 ;85(1):113-125 6015 UI - 10029 AU - M'Passi-Mabiala B AU - Meza-Aguilar S AU - Demangeat C AD - Univ Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Culiacan 80010, MexicoUniv Marien NGouabi, Dept Phys, Lab Mat & Energies, Brazzaville, CongoInst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, FranceMeza-Aguilar, S, Univ Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Bldv Americas & Univ,Ciudad Univ, Culiacan 80010, Mexico TI - Short-range induced ferromagnetism in Mn thin films on Co(001) AB - X-ray magnetic circular dichroism (XMCD) as well as magneto-optic Kerr effect display a ferromagnetic coupling at the Mn-Co interface followed by a non-ferromagnetic signal when the thickness of the Mn film on Co(0 0 1) increases. Ab initio density functional with gradient corrections (GGA) can explain this behavior. Within GGA the Mn-Co interfacial alloy with ferromagnetic coupling between Mn and Co is shown to be the ground state. Adding one and two Mn monolayers on it leads to a complex non-ferromagnetic behavior with high magnetic moments on the Mn atoms. As a result of this complex non-ferromagnetic behavior, the Mn mean magnetic moment decreases dramatically for one Mn monolayer and tends to zero for two Mn monolayers in quantitative agreement with the XMCD results. (C) 2002 Elsevier Science B.V. All rights reserved MH - Congo MH - France MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000178643200012 L2 - cobalt;density functional calculations;magnetic surfaces;manganese;metal-metal interfaces;SURFACE ALLOY; MAGNETISM; DENSITY SO - Surface Science 2002 ;518(1-2):104-110 6016 UI - 12015 AU - M'Passi-Mabiala B AU - Meza-Aguilar S AU - Demangeat C AD - Univ Marien NGouabi, Dept Phys, Lab Mat & energies, Brazzaville, CongoAbdus Salam Inst Ctr Theoret Phys, I-34100 Trieste, ItalyUniv Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Culiacon Sinaloa 80010, MexicoInst Phys & Chim Mat Strasbourg, F-63037 Strasbourg, FranceM'Passi-Mabiala, B, Univ Marien NGouabi, Dept Phys, Lab Mat & energies, BP 69, Brazzaville, Congo TI - Ferromagnetic ground state for Mn-Co surface ordered alloy on a Co(001) substrate AB - Recent low-energy electron diffraction experiments concerning submonolayer Mn coverage on Co/Cu(001) substrates displayed a well-defined Mn0.5Co0.5 surface-ordered alloy. Through the magneto-optic Kerr effect and x-ray magnetic circular dichroism a ferromagnetic coupling between Mn and Co was obtained. Ab initio density functional theory within a generalized gradient approximation is able to explain these results MH - Congo MH - France MH - Italy MH - Mexico|Sinaloa PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000173186000032 L2 - MAGNETIC-PROPERTIES; FCC CO(001); FILMS SO - Physical Review B 2002 ;65(1): 6017 UI - 9910 AU - Maass JM AU - Martinez-Yrizar A AU - Patino C AU - Sarukhan J AD - Univ Nacl Autonoma Mexico, Inst Ecol, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Hermosillo 83000, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoMaass, JM, USDA FS, Coweeta Hydrol Lab, 3160 Coweeta Lab Rd, Otto, NC 28763 USA TI - Distribution and annual net accumulation of above-ground dead phytomass and its influence on throughfall quality in a Mexican tropical deciduous forest ecosystem AB - The amount and annual net accumulation of above-ground dead woody material were quantified in a tropical deciduous forest in western Mexico. Three plots were located within a small watershed (16 ha) and distributed along a 150-m-elevation gradient (Upper, Middle and Lower plot). Total amount of above-ground dead phytomass (fine + coarse) was 27.2 Mg ha(-1). Coarse dead category (branches + logs) made up 70.6% (19.2 Mg ha(-1)) of the total. The rest comprised the fine fraction, which was lying on the forest floor as surface litter. Of the total coarse dead woody mass, 70.8% was standing, hanging or still attached to live trees (13.6 Mg ha(-1)). Dead wood net accumulation was 6.6 Mg ha(-1) y(-1); 58% of this was coarse woody material and the rest comprised the fine litterfall fraction. The amount of standing, hanging/attached dead branches (2-20 cm circumference) varied significantly among plots, with the highest value in the Upper plot. Dead wood net accumulation was similar between the Upper and Middle plots, and significantly higher than the Lower plot. Compared to the intact canopy, the removal of dead mass (hanging/attached dead branches and standing dead logs) caused a significant decrease in throughfall nutrient concentration and nutrient flux by this pathway MH - USA MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Sonora PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000179020900002 L2 - carbon pool;Chamela forest;coarse woody debris;forest canopy;litterfall;nutrient cycling;throughfall quality;watershed;NORTHEASTERN YUCATAN PENINSULA; DRY FOREST; WOODY DEBRIS; TREES; DECOMPOSITION; LITTERFALL; TURNOVER; DETRITUS; DYNAMICS; BIOMASS SO - Journal of Tropical Ecology 2002 ;18():821-834 6018 UI - 11192 AU - MacDonald MP AU - Paterson L AU - Volke-Sepulveda K AU - Arlt J AU - Sibbett W AU - Dholakia K AD - Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandInst Nacl Astron Opt & Elect, Puebla 72000, MexicoUniv Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, ScotlandDholakia, K, Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland TI - Creation and manipulation of three-dimensional optically trapped structures AB - An interferometric pattern between two annular laser beams is used to construct three-dimensional (3D) trapped structures within an optical tweezers setup. In addition to being fully translatable in three dimensions, the trapped structure can be rotated controllably and continuously by introducing a frequency difference between the two laser beams. These interference patterns could play an important rote in the creation of extended 3D crystalline structures MH - Mexico|Puebla MH - United Kingdom PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 111 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000175565000047 L2 - ORBITAL ANGULAR-MOMENTUM; MICROSCOPIC PARTICLES; LASER-BEAMS; SINGLE; LIGHT; PROPAGATION; ALIGNMENT; ENERGY; FIELDS; WAVE SO - Science 2002 ;296(5570):1101-1103 6019 UI - 9583 AU - Macias A AU - Lammerzahl C AU - Pimentel LO AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Dusseldorf, Inst Expt Phys, D-4000 Dusseldorf, GermanyMacias, A, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Matching conditions in metric-affine gravity AB - By using an isotropic field configuration for the triplet ansatz sector of the metric-affine theories of gravity (MAG), we find a class of harmonic solutions which represents the interior and exterior field of a distribution endowed with electric and strong gravitoelectric multipole moments. Moreover, the general matching and junction conditions in MAG and their reduction to the triplet ansatz sector are presented MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000179679900038 L2 - STATIC BLACK-HOLES; GAUGE-THEORY; INFLATIONARY UNIVERSE; STRING THEORY; FLATNESS; DILATION; COMPUTER; HORIZON; TORSION; CHARGES SO - Physical Review D 2002 ;66(10): 6020 UI - 9748 AU - Macias E AU - Castillejos AH AU - Acosta FA AU - Herrera M AU - Neumann F AD - Univ Autonoma San Luis Potosi, San Luis Potosi, MexicoCINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoHYLSA, SA CV, San Nicolas, NL, MexicoMet GmbH & Co KG, Mulheim, GermanyMacias, E, Univ Autonoma San Luis Potosi, San Luis Potosi, Mexico TI - Modelling molten flux layer thickness profiles in compact strip process moulds for continuous thin slab casting AB - The important functions promoted by powdered flux added over the liquid steel surface in continuous casting moulds are strongly affected by the thickness of the liquid layer that forms as a result of the heat absorbed. The present work discusses the results of a three-dimensional steady state model, developed to represent the coupled fluid flow and heat transfer phenomena that determine thickness profiles of the liquid flux layer. Since the laminar flow of the liquid slag layer depends on the shearing imposed on it by the turbulent motion of the liquid steel beneath it, and since additionally this motion is strongly influenced by the flow characteristics of the steel stream poured into the mould through the submerged entry nozzle (SEN), separate turbulent flow models for the liquid steel in the SEN and the mould were also developed. The consistency among the models and their accuracy was judged by comparing thickness and temperature flux profiles measured in plant against predicted ones; the comparison showed good agreement. The effects of casting speed, mould width, and flux viscosity and heat of melting on the liquid layer thickness were investigated. The last variable was found to exert the most marked influence. Different from conventional casting moulds, where the liquid layer thickness increases with increasing casting speed, in compact strip process moulds the thickness remains almost constant with increasing casting speed. This difference is well accounted for by the model, which suggests that this behaviour stems from the different slag flow patterns generated in straight, wide moulds and in thin moulds having a central upper funnel shaped section MH - Germany MH - Mexico|Coahuila MH - Mexico|Nuevo Leon MH - Mexico|San Luis Potosi PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0301-9233 UR - ISI:000179386200004 L2 - TURBULENT-FLOW SO - Ironmaking & Steelmaking 2002 ;29(5):347-358 6021 UI - 9833 AU - Macias S AU - Nadler SB AD - W Virginia Univ, Dept Math, Morgantown, WV 26506, USANatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMacias, S, W Virginia Univ, Dept Math, Morgantown, WV 26506, USA TI - Fans whose hyperspace of subcontinua are cones AB - It is proved that if F is a fan, then the hyperspace of subcontinua of F is homeomorphic to a cone over a continuum if and only if F is homeomorphic to a cone over a compact metric space. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000179162000003 L2 - cone;continuum;dendroid;fan;hyperspace;smooth fan SO - Topology and Its Applications 2002 ;126(1-2):29-36 6022 UI - 11130 AU - MacKelvie KJ AU - Mckay HA AU - Petit MA AU - Moran O AU - Khan KM AD - Univ British Columbia, Sch Human Kinet, Vancouver, BC V6T 1Z1, CanadaPenn State Univ, Coll Med, Dept Hlth Evaluat Sci, Hershey, PA, USAUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi, MexicoUniv British Columbia, Dept Family Practice, Fac Med, Vancouver, BC V5Z 1M9, CanadaMacKelvie, KJ, Univ British Columbia, Sch Human Kinet, 6081 Univ Blvd, Vancouver, BC V6T 1Z1, Canada TI - Bone mineral response to a 7-month randomized controlled, school-based jumping intervention in 121 prepubertal boys: Associations with ethnicity and body mass index AB - We examined the effects of a 7-month jumping intervention (10 minutes, 3 times per week) on bone mineral gain in prepubertal Asian and white boys (10.3 +/- 0.6 years, 36.0 +/- 9.2 kg) at 14 schools randomized to control (n = 60) and intervention (n = 61) groups. Intervention and control groups had similar mean baseline and change in height, weight, lean mass and fat mass, baseline areal bone mineral density (aBMD; g/cm(2)), bone mineral content (BMC; g; dual-energy X-ray absorptiometry [DXA], QDR 4500W), and similar average physical activity and calcium intakes. Over 7 months, the intervention group gained more total body (TB) BMC (1.6%,p < 0.01) and proximal femur (PF) aBMD (1%,p < 0.05) than the control group after adjusting for age, baseline weight, change in height, and loaded physical activity. We also investigated the 41 Asian and 50 white boys (10.2 +/- 0.6 years and 31.9 +/- 4.4 kg) who were below the 75th percentile (19.4 kg/m(2)) of the cohort mean for baseline body mass index (BMI). Boys in the intervention group gained significantly more TB and lumbar spine (LS) BMC, PF aBMD, and trochanteric (TR) aBMD (+ similar to2%) than boys in the control group (adjusted for baseline weight, final Tanner stage, change in height, and loaded physical activity). Bone changes were similar between Asians and whites. Finally, we compared the boys in the control group (n = 16) and the boys in the intervention group (n = 14) whose baseline BMI fell in the highest quartile (10.5 +/- 0.6 years and 49.1 +/- 8.2 kg). Seven-month bone changes (adjusted as aforementioned) were similar in the control and intervention groups. In summary, jumping exercise augmented bone mineral accrual at several regions equally in prepubertal Asian and white boys of average or low BMI, and intervention effects on bone mineral were undetectable in high BMI prepubertal boys MH - Canada MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 29 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0884-0431 UR - ISI:000175229100011 L2 - PHYSICAL-ACTIVITY QUESTIONNAIRE; EXERCISE INTERVENTION; APPENDICULAR SKELETONS; INACCURACIES INHERENT; SEXUAL-MATURATION; GROWING CHILDREN; HEALTHY-CHILDREN; CONTROLLED TRIAL; OLDER CHILDREN; OBESE CHILDREN SO - Journal of Bone and Mineral Research 2002 ;17(5):834-844 6023 UI - 9439 AU - Macotela Y AU - Mendoza C AU - Corbacho AM AU - Cosio G AU - Eiserich JP AU - Zentella A AU - de la Escalera GM AU - Clapp C AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Juriquilla 76001, Qro, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Internal Med, Davis, CA 95616, USAClapp, C, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Juriquilla 76001, Qro, Mexico TI - 16K Prolactin induces NF-kappa B activation in pulmonary fibroblasts AB - The amino-terminal 16 kDa fragment of prolactin (16K PRL) promotes the expression of the inducible isoform of nitric oxide synthase (iNOS) accompanied by the production of nitric oxide (NO) by rat pulmonary fibroblasts. The present study was designed to elucidate whether the mechanism by which 16K PRL promotes iNOS expression involves the activation of nuclear factor-kappa B (NF-kappaB), a key transcription factor for iNOS induction. 16K PRL stimulated DNA-binding activity of NF-kappaB in pulmonary fibroblasts as demonstrated by gel shift assays. Likewise, fluorescence immunocytochemistry showed that 16K PRL promotes nuclear translocation of the p65 subunit of NF-kappaB. Finally, treatment with 16K PRL induced the degradation of the NF-kappaB inhibitor kappaB-beta (IkappaB-beta), and such degradation was prevented by blocking IkappaB-beta phosphorylation. Altogether, these results show that 16K PRL activates NF-kappaB nuclear translocation via the phosphorylation and degradation of IkappaB-beta. These findings are consistent with NF-kappaB being part of the signal transduction pathway activated by 16K PRL to induce iNOS expression MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BRISTOL: SOC ENDOCRINOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0022-0795 UR - ISI:000180182500026 L2 - NITRIC-OXIDE SYNTHASE; TUMOR-NECROSIS-FACTOR; ENDOTHELIAL-CELLS; PROTEOLYTIC CLEAVAGE; SIGNAL-TRANSDUCTION; INDUCTION; PATHWAYS; RAT; PHOSPHORYLATION; EXPRESSION SO - Journal of Endocrinology 2002 ;175(3):R13-R18 6024 UI - 11840 AU - Maczka M AU - Hanuza J AU - Fuentes AF AU - Amador U AD - Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, PolandWroclaw Univ Econ, Fac Ind & Econ, Dept Bioorgan Chem, PL-53345 Wroclaw, PolandIPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoUniv San Pablo, CEU, Fac Ciencias Expt & Tecn, Dept Quim Inorgan & Mat, Madrid 28668, SpainMaczka, M, Polish Acad Sci, Inst Low Temp & Struct Res, POB 1410, PL-50950 Wroclaw 2, Poland TI - Vibrational characteristics of new double tungstates Li2MII(WO4)(2) (M = Co, Ni and Cu) AB - For the first time, Raman and IR studies were performed on new double tungstates Li2MII(WO4)(2) (M = Co, Ni and Cu) crystallizing in the wolframite-type structure. The observed vibrational modes were assigned to the respective motions of atoms in the unit cell. The vibrational properties of the Cu derivative differ significantly from those of the cobalt and nickel derivatives. The differences were attributed to the differences in the crystal structures. A comparison of the results with literature data for (MWO4)-W-II and LiMIII(WO4)(2) (M-II = Zn, Fe, Cu; M-III = Fe, In, Sc), crystallizing in the wolframite-like structure, revealed a very large splitting for a few bridging modes and large shifts of the low-wavenumber modes towards higher wavenumbers in the case of Li2MII(Wo(4))(2). These features were assigned to different arrangements of tungsten-oxygen interactions within the infinite chains, which results in the formation of two non-equivalent oxygen bridges in the structure of the compounds studied. Copyright (C) 2002 John Wiley Sons, Ltd MH - Mexico|Coahuila MH - Poland MH - Spain PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Spectroscopy U5 - J;Article AV - English IS - 0377-0486 UR - ISI:000173735500010 L2 - WOLFRAMITE STRUCTURE; CRYSTALS SO - Journal of Raman Spectroscopy 2002 ;33(1):56-61 6025 UI - 9522 AU - Madera-Santana TJ AU - guilar-Vega MJ AU - Marquez A AU - Moreno FV AU - Richardson MOW AU - Machin JLC AD - Ctr Invest Cientif Yucatan AC, Merida 97310, Yucatan, MexicoLoughborough Univ Technol, Inst Polymer Technol & Mat Engn, Loughborough LE11 3TU, Leics, EnglandEscuela Militar Ingn, Mexico City, DF, MexicoAguilar-Vega, MJ, Ctr Invest Cientif Yucatan AC, AP 87 Cordemex, Merida 97310, Yucatan, Mexico TI - Production of leather-like composites using short leather fibers. II. Mechanical characterization AB - Leather-like composites were prepared by addition of chemically modified short leather fibers (SLF) into a plasticized polyvinyl chloride (pPVC) matrix. The fibers were subjected to chemical modification by emulsion polymerization to achieve good interfacial adhesion between SLF and the pPVC matrix. The SLF with chemical modification were obtained from three different reaction conditions where these SLF have different percentages of grafted and deposited PMMA polymer onto the fiber surface. The incorporation of the SLF into the thermoplastic matrix was carried out using a torque-rheometer and the composites obtained were molded by compression. Tensile and tear mechanical tests were performed on composite samples, and the morphology of the fractured surfaces was analyzed using scanning electron microscopy (SEM). The results show that the incorporation by grafting of polymethyl metacrylate (PMMA) onto the fibers produced a significant improvement of their interfacial adhesion,to pPVC, promoting the compatibilization between the fiber surface and matrix. The findings are discussed and interpreted in terms of enhanced adhesion at phase boundaries. Overall, the results confirm that it is possible to produce modified leather composites based on a pPVC matrix, which exhibit relatively high tensile strength, tear resistance and flexibility. These composites are very suitable candidate materials for applications in the footwear industry MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Composites;Polymer Science U5 - J;Article AV - English IS - 0272-8397 UR - ISI:000179979600002 L2 - LOW-DENSITY POLYETHYLENE; NATURAL FIBER; CELLULOSE FIBERS; POLYPROPYLENE; BLENDS; SURFACES; FILLERS; RUBBER; FLOUR SO - Polymer Composites 2002 ;23(6):991-1002 6026 UI - 10919 AU - mador-Ramirez MD AU - Wilson RG AU - Martin AR AD - INIFAP, Calera DE VR 98500, Zacatecas, MexicoUniv Nebraska, Panhandle Res & Extens Ctr, Scottsbluff, NE 69361, USAUniv Nebraska, Dept Agron, Lincoln, NE 68583, USAAmador-Ramirez, MD, INIFAP, Campo Expt Calera,Apartado Postal 18, Calera DE VR 98500, Zacatecas, Mexico TI - Effect of in-row cultivation, herbicides, and dry bean canopy on weed seedling emergence AB - Field experiments were conducted in 1996 and 1997 to evaluate the effect of EPTC (S-ethyl dipropyl carbamothioate) plus ethalfluralin at 2.4 plus 0.83 kg ai ha(-1), rotary hoeing, in-row cultivation, rotary hoeing plus in-row cultivation, and dry bean canopy on weed seedling emergence. Cumulative weed emergence in 1996 and 1997 was similar in cropped and noncropped areas. Herbicides were more effective than mechanical cultivation in reducing weed emergence 91% in 1996 and 88% in 1997. Weed emergence was similar in both rotary hoed area and cultivated area in 1996 but weed emergence was 44% lower in rotary hoed plots than in cultivated plots in 1997. The Gompertz equation did not adequately predict weed seedling emergence in the untreated control and with in-row cultivation in 1996. Initial weed seedling emergence was observed at about 120 growing degree-days with 3 to 9% cumulative emergence among treatments. In 1997, the Gompertz equation adequately described weed seedling emergence in plots with or without disturbed soil. Weed emergence was first observed at 80 growing degree-days with 6 to 16% cumulative emergence among treatments. Predicted percent weed emergence closely approximated observed emergence in 1996 and 1997. Rotary hoeing plus in-row cultivation reduced maximum percent emergence rate 37% on an average. The greater maximum percent emergence rate obtained with in-row cultivation suggests that this treatment increased weed seedling emergence in 1997. On average, weed seedling emergence in the untreated check was lower in cropped areas than in noncropped areas, implying a competitive effect by the dry bean crop. Although weed seedling emergence occurred throughout the growing season, more weed seedlings emerged in June and early July than in late July and August MH - Mexico|Zacatecas MH - USA PB - LAWRENCE: WEED SCI SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0043-1745 UR - ISI:000176184300015 L2 - EPTC (S-ethyl dipropyl carbamothioate);ethalfluralin;redroot pigweed;Amaranthus retroflexus L. AMARE;common lambsquarters, Chenopodium album L. CHEAL;hairy nightshade, Solanum sarrachoides Sendt. SOLSA;wild proso millet, Panicum miliaceum L. PANMI;dry bean, Phaseolus vulgaris cv;Great Northern 'Beryl';nonlinear regression;preplant incorporated herbicides;rotary hoeing;undisturbed soil;thermal time units;SENECIO-VULGARIS L; PASTORIS L MEDIK; PHASEOLUS-VULGARIS; PIGWEED AMARANTHUS; GERMINATION; TIME; TILLAGE; SORGHUM; TEMPERATURE; SUPPRESSION SO - Weed Science 2002 ;50(3):370-377 6027 UI - 8357 AU - Magallon S AU - Sanderson MJ AD - Univ Calif Davis, Sect Evolut & Ecol, Davis, CA 95616, USAMagallon, S, Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Circuito Exterior,Anexo Jardin Bot,AP 70-233, Mexico City 04510, DF, Mexico TI - Relationships among seed plants inferred from highly conserved genes: Sorting conflicting phylogenetic signals among ancient lineages AB - Phylogenetic studies based on different types and treatment of data provide substantially conflicting hypotheses of relationships among seed plants. We conducted phylogenetic analyses of sequences of two highly conserved chloroplast genes, psaA and psbB, for a comprehensive taxonomic sample of seed plants and land plants. Parsimony analyses of two different codon position partitions resulted in well-supported, but significantly conflicting, phylogenetic trees. First and second codon positions place angiosperms and gymnosperms as sister clades and Gnetales as sister to Pinaceae. Third positions place Gnetales as sister to all other seed plants. Maximum likelihood trees for the two partitions are also in conflict. Relationships among the main seed plant clades according to first and second positions are similar to those found in parsimony analysis for the same data, but the third position maximum likelihood tree is substantially different from the corresponding parsimony tree, although it agrees partially with the first and second position trees in placing Gnetales as the sister group of Pinaceae. Our results document high rate heterogeneity among lineages, which, together with the greater average rate of substitution for third positions, may reduce phylogenetic signal due to long-branch attraction in parsimony reconstructions. Whereas resolution of relationships among major seed plant clades remains pending, this study provides increased support for relationships within major seed plant clades MH - Mexico|Distrito Federal MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 45 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000183132500014 L2 - angiosperms;Gnetales;gymnosperms;long-branch attraction;maximum likelihood;psaA;psbB;third codon positions;FLOWERING PLANTS; DOUBLE FERTILIZATION; EXTANT GYMNOSPERMS; CHLOROPLAST-DNA; LAND PLANTS; SEXUAL REPRODUCTION; MULTIGENE PHYLOGENY; 18S RDNA; SEQUENCES; ANGIOSPERMS SO - American Journal of Botany 2002 ;89(12):1991-2006 6028 UI - 10443 AU - Magnabosco CDU AU - Ojala M AU - de los Reyes A AU - Sainz RD AU - Fernandes A AU - Famula TR AD - Brazilian Agr Res Corp, Natl Res Council Cerrados Syst, EMBRAPA CERRADOS, ARROZ & FEIJAO, Planaltina, BrazilUniv Helsinki, Dept Anim Sci, Helsinki, FinlandFed Univ Goias, Dept Anim Prod, Goiania, Go, BrazilUniv Calif Davis, Dept Anim Sci, Davis, CA 95616, USAAMCC, Tampico, Tamaulipas, MexicoMagnabosco, CDU, Rua T-36 Q154 Lt 04 Apto,202 REsidencial Ipanema,, BR-74223050 Goiania, Go, Brazil TI - Estimates of environmental effects and genetic parameters for body measurements and weight in Brahman cattle raised in Mexico AB - A Derivative Free Restricted Maximum Likelihood (DFREML) algorithm was used with single trait and two traits animal models to estimate the variance and covariance components and thus, heritabilities and phenotypic, genetic and environmental correlations among nine different body measurements and weights of Brahman cattle raised in Mexico. The following measurements were considered: hip width, pin width, hip-pin width, anterior height, posterior height, body length, thorax perimeter, scrotal circumference and weight. The analysis was based on a total of 1018 animals, born between 1992 and 1995, from 17 herds in the Mexican States of Chiapas, San Luis Potosi, Tabasco, Tamaulipas and Veracruz. The model included the following fixed effects: herd, year-season of birth, sex, age of the animal and feed management. The only random effect was the direct additive genetic contribution of each animal. All fixed effects in the model were significant for all traits (p < 0.05). Estimated heritabilities for the traits were: hip width 0.57, pin width 0.32, hip-pin width 0.41, anterior height 0.56, posterior height 0.54, body length 0.32, thorax perimeter 0.49, scrotal circumference 0.02 and weight 0.66. The magnitude of the heritabilities was medium to high, with the exception of scrotal circumference. The genetic correlations among all body measurements were consistently positive and high, ranging from 0.64 to 1.00. Although other measures showed higher genetic correlations with weight, thorax perimeter combines a high value (0.70) with ease and repeatability, making it a useful field measurement to estimate body weight when scales are not available MH - Brazil MH - Finland MH - Mexico|Tamaulipas MH - USA PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0931-2668 UR - ISI:000177464100003 SO - Journal of Animal Breeding and Genetics 2002 ;119(4):221-228 6029 UI - 10669 AU - Mahalingam T AU - John VS AU - Rajendran S AU - Ravi G AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaAlagappa Univ, Crystal Res Ctr, Karaikkudi 630003, Tamil Nadu, IndiaUNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco, Morelos, MexicoTDMNS COll, T Kallikulam 627113, IndiaMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Annealing studies of electrodeposited zinc telluride thin films AB - Zinc telluride (ZnTe) thin films were prepared potentiostatically from an aqueous solution bath containing ZnSO4 and TeO2. Structural studies were carried out for films deposited at various potentials and lattice parameters were evaluated using the Nelson-Riley plot. The effects of annealing on the structural, optical and morphological behavior were studied. Current-voltage studies revealed a space charge limited conduction mechanism and the trap density of films was estimated. The microscopic composition was analyzed by EDAX, XPS and the results are discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Morelos PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000176873900022 L2 - zinc telluride;electrodeposition;annealing;morphology;surface composition;space charge limited conduction;SOLAR-CELLS; ZNTE; SEMICONDUCTORS SO - Surface & Coatings Technology 2002 ;155(2-3):245-249 6030 UI - 10789 AU - Mahalingam T AU - Chitra JSP AU - Rajendran S AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaUNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Potentiostatic deposition and characterization of Cu2O thin films AB - Semiconducting Cu2O thin films were electrodeposited potentiostatically on Cu and SnO2, substrates. The deposition kinetics of film growth and the conditions to obtain spotty and uniform Cu2O films are studied. X-ray diffraction studies revealed the formation of single phase cubic Cu2O films. The effects of deposition potential, solution pH and bath temperature on the structure are studied. The optical, electrical, composition and morphological analysis are carried out for Cu2O films prepared at various deposition conditions and the results are discussed MH - India MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000176642800013 L2 - CUPROUS-OXIDE; SOLAR-CELLS SO - Semiconductor Science and Technology 2002 ;17(6):565-569 6031 UI - 10885 AU - Mahalingam T AU - John VS AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaTDMNS Coll, Dept Phys, T Kallikulam 627113, IndiaUNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoJohn, VS, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Characterization of zinc telluride thin films for photoelectrochemical applications AB - Zinc telluride (ZnTe) semiconducting thin films were prepared by cathodic electrodeposition on to tin-oxide-coated glass and titanium substrates. Studies revealed that stoichiometric ZnTe films were synthesized by maintaining the deposition potential, solution pH, zinc concentration, and bath temperature as -1.1 V versus a saturated calomel electrode, 3.5 +/- 0.01, 0.15 M, and 90 degreesC respectively. The effect of deposition potential on the structure of ZnTe films was investigated. The variations of the optical constants and dielectric constant of ZnTe thin films with wavelength were studied. The surface morphology and film composition were analysed by means of a scanning electron microscope and energy-dispersive x-ray analysis respectively. It is found that a minimum concentration of Zn2+ ions in the solution bath yielded stoichiometric films with smooth surfaces. Preliminary studies on photoelectrochemical solar cells based on ZnTe were carried out and the results are discussed MH - India MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000176400700013 L2 - OPTICAL-PROPERTIES; QUANTUM-WELLS; ZNTE SO - Journal of Physics-Condensed Matter 2002 ;14(21):5367-5375 6032 UI - 11014 AU - Mahalingam T AU - John VS AU - Rajendran S AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaUNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoTDMNS Coll, T Kallikulam 627113, IndiaMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Electrochemical deposition of ZnTe thin films AB - The electrodeposition of zinc telluride (ZnTe) thin films on tin conductive oxide substrates in aqueous solution containing TeO2 and ZnSO4 was studied. The electrodeposition mechanism was investigated by cyclic voltammetry. The appropriate potential region where formation of stoichiometric ZnTe semiconductor occurs, was found to be -1.1 V versus saturated calomel electrode, and the pH was maintained at 3.5 +/- 0.1. The crystallographic structure of the deposited film is seen to be cubic with a preferential orientation along the (111) phase. Optical absorption studies reveal a bandgap of 2.26 eV and optical constants (n and k) are evaluated. Scanning electron microscopy imaging was used to study the surface morphology. The composition of ZnTe films was analysed using an electron microprobe analyser, and the results are discussed MH - India MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000175969200013 L2 - CDTE SOLAR-CELLS; POLYCRYSTALLINE ZNTE; QUANTUM-WELLS; ELECTRODEPOSITION; PHOTOLUMINESCENCE; TEMPERATURE; EPITAXY; GROWTH SO - Semiconductor Science and Technology 2002 ;17(5):465-470 6033 UI - 11407 AU - Mahalingam T AU - John VS AU - Ravi G AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaEnergy Res Ctr, Solar Hydrogen Fuel Cell Grp, Unam 62580, Morelos, MexicoTDMNS Coll, Dept Phys, T Kallikulam 627113, Tamil Nadu, IndiaMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Microstructural characterization of electrosynthesized ZnTe thin films AB - Thin films of zinc telluride (ZnTe) were electrosynthesized on tin oxide coated conducting glass substrates at various bath temperatures. The deposited films were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The structure was found to be cubic with preferential orientation along (1 1 1) plane. X-ray line profile analysis technique by the method of the variance has been used to evaluate the microstructural parameters. The variation of different microstructural parameters such as, crystallite size, RMS strain, dislocation density and stacking fault probability affecting the fraction of planes with film thickness and bath temperatures were studied. The experimental observations are discussed in detail MH - India MH - Mexico|Morelos PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Crystallography U5 - J;Article AV - English IS - 0232-1300 UR - ISI:000174944700002 L2 - zinc telluride;electrosynthesis;line broadening;microstructural parameters;surface morphology;CDTE; EPITAXY SO - Crystal Research and Technology 2002 ;37(4):329-339 6034 UI - 11922 AU - Maillo M AU - Aguilar MB AU - Lopez-Vera E AU - Craig AG AU - Bulaj G AU - Olivera BM AU - de la Cotera EPH AD - Univ Utah, Dept Biol, Salt Lake City, UT 84112, USAUniv Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla, Queretaro, MexicoInst Venezolano Invest Cient, Ctr Quim, Caracas 1020A, VenezuelaSalk Inst, Clayton Fdn Labs Peptide Biol, San Diego, CA 92186, USAOlivera, BM, Univ Utah, Dept Biol, Salt Lake City, UT 84112, USA TI - Conorfamide, a Conus venom peptide belonging to the RFamide family of neuropeptides AB - A novel Conus peptide, conorfamide-Srl, has been characterized. The sequence of the natural peptide was determined using standard Edman sequencing methods and mass spectrometry, and confirmed by chemical synthesis. The peptide has 12 amino acids and no cysteine residues. The following sequence was obtained: GPMGWVPVFYRF-NH2 No other peptide from a vermivorous Atlantic Conus species has previously been characterized. Conorfamide-Srl belongs to the RFamide neuropeptide family, and is the first RFamide peptide to be found in any venom. The presence of conorfamide-Srl as a major peptide in Conus spurius venom suggests that Conus lineages in the Atlantic may have evolved novel Conus venom peptide families. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - USA MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000173462600003 L2 - Conus venom;neuropeptide;RFamide peptides;molluscs;ENaC channels;MORPHINE MODULATING PEPTIDES; CAENORHABDITIS-ELEGANS; GENE FAMILY; FMRFAMIDE; SNAIL; EVOLUTION; PRECURSOR; FARPS; HELIX; NPFF SO - Toxicon 2002 ;40(4):401-407 6035 UI - 11555 AU - Makarets MV AU - Koshevaya SV AU - Gernets AA AD - Autonomous Univ Morelos, CIICAP, Cuernavaca 62210, Morelos, MexicoKyiv Natl Shevchenko Univ, Dept Phys, UA-01033 Kiev, UkraineKoshevaya, SV, Autonomous Univ Morelos, CIICAP, Av Univ,Col Chamilpa 1001, Cuernavaca 62210, Morelos, Mexico TI - Electromagnetic emission caused by the fracturing of piezoelectrics in rocks AB - Electromagnetic emission caused by the fracturing of piezoelectrics in rocks has been studied. It is revealed that the source of the emission is the transient magnetization appearing due to the moving crack. The frequency-angle distribution of the emission is found. The maximal frequency of the emission is determined by 1/T-0. where T-0 is the time of the crack's movement in the material. The wavelength is about L/ V (V is the velocity of the moving crack and L is the size of the piezocrystal in the rock). The polar pattern of the emission is located in the piezoactive plane of the crystal. The considered problem is very promising for investigations of natural hazards as seismic and volcano activities MH - Mexico|Morelos MH - Ukraine PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-8949 UR - ISI:000174547100014 SO - Physica Scripta 2002 ;65(3):268-272 6036 UI - 11335 AU - Maldonado C AU - North TH AD - Univ Michoacana, Inst Invest Met, Morelia, Michoacan, MexicoUniv Toronto, Dept Met & Mat Sci, Toronto, ON, CanadaMaldonado, C, Univ Michoacana, Inst Invest Met, Morelia, Michoacan, Mexico TI - Softened zone formation and joint strength properties in dissimilar friction welds AB - The mechanical properties of dissimilar MMC/AISI 304 stainless steel friction welds with and without silver interlayers were examined. The notch tensile strengths of MMC/AISI 304 stainless steel and MMC/Ag/AISI 304 stainless steel friction welds increased when high friction pressures were applied during the joining operation. The higher notch tensile strengths of dissimilar MMC/AISI and MMC/Ag/AISI 304 stainless steel friction welds resulted from the formation of narrow softened zones in MMC material immediately adjacent to the bondline. The influence of softened zone width and hardness (yield strength) on the notch tensile strengths of dissimilar welds was analysed using finite element modelling (FEM). FEM in combination with the assumption of a ductile failure criterion was used to calculate the notch tensile strengths of dissimilar joints. The key assumption in this work is that dissimilar weld failure wholly depended on the characteristics (mechanical properties and dimensions) of the softened zone formed in MMC material immediately adjacent to the bondline. The modelling results produced based on this assumption closely correspond with the actual notch tensile strengths of dissimilar MMC/Ag/AISI 304 stainless steel and MMC/Ag/AISI 304 stainless steel friction welds. (C) 2002 Kluwer Academic Publishers MH - Canada MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000175095300021 L2 - ALUMINUM-ALLOY JOINT; WELDMENTS; TENSION SO - Journal of Materials Science 2002 ;37(10):2087-2095 6037 UI - 10876 AU - Maldonado JM AU - Arias R AU - Oelze HH AU - Bean VE AU - Houser JF AU - Lachance C AU - Jacques C AD - CENAM, Queretaro 76900, DF, MexicoPhys Tech Bundesanstalt, D-38023 Braunschweig, GermanyNIST, Gaithersburg, MD 20899, USAMeasurement Canada, Ottawa, ON K1A 0C9, CanadaNatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, CanadaMaldonado, JM, CENAM, Queretaro 76900, DF, Mexico TI - International comparison of volume measurement standards at 50 1 at the CENAM (Mexico), PTB (Germany), Measurement Canada and NIST (USA) AB - The Centro Nacional de Metrologia (CENAM), the Physikalisch-Technische Bundesanstalt (PTB), Measurement Canada (MC), and the National Institute of Standards and Technology (NIST) maintain the national primary standard facilities for the measurement of volume in Mexico, Germany, Canada and the United States, respectively. These laboratories have compared volume measurements at 50 1. The comparison was accomplished by each laboratory calibrating a transfer standard volume that was circulated among the laboratories, with the CENAM acting as pilot laboratory. All the participants used gravimetric methods. The maximum and minimum reported volumes differ by 0.0098 % MH - Canada MH - Germany MH - Mexico|Distrito Federal MH - USA PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000176411800010 L2 - TEMPERATURE SCALE; WATER DENSITY; EQUATION SO - Metrologia 2002 ;39(1):91-95 6038 UI - 9377 AU - Malijevsky A AU - Malijevsky A AU - Yuste SB AU - Santos A AU - de Haro ML AD - Inst Chem Technol, CR-16628 Prague 6, Czech RepublicUniv Extremadura, Dept Fis, E-06071 Badajoz, SpainUNAM, Ctr Invest Energia, Temixco, Morelos, MexicoMalijevsky, A, Inst Chem Technol, CR-16628 Prague 6, Czech Republic TI - Structure of ternary additive hard-sphere fluid mixtures AB - Monte Carlo simulations on the structural properties of ternary fluid mixtures of additive hard spheres are reported. The results are compared with those obtained from a recent analytical approximation [S. B. Yuste, A. Santos, and M. Lopez de Haro, J. Chem. Phys. 108, 3683 (1998)] to the radial distribution functions of hard-sphere mixtures and with the results derived from the solution of the Ornstein-Zernike integral equation with both the Martynov-Sarkisov and the Percus-Yevick closures. Very good agreement between the results of the first two approaches and simulation is observed, with a noticeable improvement over the Percus-Yevick predictions especially near contact MH - Czech Republic MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000180427000017 L2 - IMPROVED PERTURBATION-THEORY; THERMODYNAMIC PROPERTIES; 2 COMPONENTS; STABILITY; EQUATION; LIQUIDS SO - Physical Review e 2002 ;66(6): 6039 UI - 10460 AU - Malkan MA AU - Hicks EK AU - Teplitz HI AU - Mclean IM AU - Sugai H AU - Guichard J AD - Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095, USANatl Opt Astron Observ, Tucson, AZ 85719, USAGoddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771, USAKyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, JapanInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoMalkan, MA, Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA TI - 1-1.4 micron spectral atlas of stars AB - We present a catalog of J-band (1.08 to 1.35 mum) stellar spectra at low resolution (R similar to 400). The targets consist of 105 stars ranging in spectral type from O9.5 to M7 and luminosity classes I through V. The relatively featureless spectra of hot stars, earlier than A4, can be used to remove the atmospheric features which dominate ground-based J-band spectroscopy. We measure equivalent widths for three absorption lines and nine blended features which we identify in the spectra. Using detailed comparison with higher resolution spectra, we demonstrate that low-resolution data can be used for stellar classification, since several features depend on the effective temperature and gravity. For example, the CN index (1.096-1.104 mum) decreases with temperature, but the strength of a blended feature at 1.28 mum (consisting of primarily Pbeta) increases. The slope of a star's spectrum can also be used to estimate its effective temperature. The luminosity class of a star correlates with the ratio of the Mg I(1.1831 mum) line to a blend of several species at 1.16 mum. Using these indicators, a star can be classified to within several subclasses. Fifteen stars with particularly high and low metal abundances are included in the catalog, and some spectral dependence on metal abundance is also found MH - USA MH - Japan MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000177524600005 L2 - infrared : stars;line : identification;stars : fundamental parameters;TELESCOPE; BAND SO - Astrophysical Journal Supplement Series 2002 ;142(1):79-94 6040 UI - 9857 AU - Malone JR AU - Nance RD AU - Keppie JD AU - Dostal J AD - Ohio Univ, Dept Geol Sci, Athens, OH 45701, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaNance, RD, Ohio Univ, Dept Geol Sci, Athens, OH 45701, USA TI - Deformational history of part of the Acatlan Complex: Late ordovician-early silurian and early permian orogenesis in southern Mexico AB - The Paleozoic Acatlan Complex of southern Mexico comprises polydeformed metasedimentary, granitoid, and mafic-ultramafic rocks variously interpreted as recording the closure of the Iapetus, Rheic, and Ouachitan Oceans. The complex is tectonically juxtaposed on its eastern margin against Grenville-age gneisses (Oaxacan Complex) that are unconformably overlain by Lower Paleozoic strata containing fossils of Gondwanan affinity. A thick siliciclastic unit (Chazumba and Cosoltepec Formations) at the base of the complex is considered part of a Lower Paleozoic accretionary prism with a provenance that isotopically resembles the Oaxacan Complex. This unit is tectonically overridden by a locally eclogitic mafic-ultramafic unit interpreted as a westward-obducted ophiolite, the emplacement of which was synchronous with mylonitic granitoid intrusion at ca. 440 Ma. Both units are unconformably overlain by a deformed volcano-sedimentary sequence (Tecomate Formation) attributed to a volcanic arc of presumed Devonian age. Deformed granitoids in contact with this sequence have been dated at ca. 371 (La Noria granite) and 287 Ma (Totoltepec pluton). Three phases of penetrative deformation (D1-3) affect the Cosoltepec Formation; the last two correlate with two penetrative deformational phases that affect the Tecomate Formation. D-1 is of unknown kinematics but predates deposition of the Tecomate Formation and likely records obduction at ca. 440 Ma (Acatecan orogeny). A folded foliation in the Totoltepec pluton appears to record both deformational phases in the Tecomate Formation, bracketing D-2 and D-3 between 287 Ma and the deposition of the nonconformably overlying Leonardian Matzitzi Formation. D-2 records north-south dextral transpression and south-vergent thrusting and is attributed to the collision of Gondwana and southern Laurentia (Ouachitan orogeny) at ca. 290 Ma, the kinematics being consistent with the northward motion of Mexico that is required by most continental reconstructions for the final assembly of Pangea. D-3, which produced broadly north-south, upright folds, is also attributed to this collision and likely followed D-2 closely in the latest Paleozoic. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000179111700002 L2 - Acatlan Complex;Paleozoic orogenesis;Totoltepec pluton;ASSEMBLAGES; EVOLUTION; GULF SO - Journal of South American Earth Sciences 2002 ;15(5):511-524 6041 UI - 10729 AU - Manko OV AU - Manko VS AU - Ruiz E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMoscow MV Lomonosov State Univ, Dept Quantum Stat & Field Theory, Moscow 119899, RussiaUniv Salamanca, Area Fis Teor, E-37008 Salamanca, SpainManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Equilibrium of two compound Kerr disks AB - We introduce the notion of compound Kerr disks within the framework of the quadruple-Kerr solution and demonstrate that gravitational equilibrium of two such objects is possible. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000176725600007 L2 - DIFFERENTIALLY ROTATING-DISKS; GRAVITATIONAL-FIELD; DUST; EQUATIONS SO - Physics Letters A 2002 ;299(1):43-45 6042 UI - 11322 AU - Manko OV AU - Manko VS AU - Ruiz E AD - Moscow MV Lomonosov State Univ, Dept Quantum Stat & Field Theory, Moscow 119899, RussiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Salamanca, Area Fis Teor, E-37008 Salamanca, SpainManko, OV, Moscow MV Lomonosov State Univ, Dept Quantum Stat & Field Theory, Moscow 119899, Russia TI - Equilibrium of three collinear Kerr particles AB - The equilibrium problem of three collinear Kerr particles is studied within the framework of an exact solution of Einstein's equations. The system of conditions defining the equilibrium of the particles is derived in an explicit form and particular equilibrium configurations involving black-hole and hyperextreme constituents are considered. It is demonstrated that in some equilibrium states a spinning particle can exhibit combined properties characteristic both of black holes and hyperextreme objects MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000175146900064 L2 - EXTENDED MULTISOLITON SOLUTIONS; EINSTEIN FIELD-EQUATIONS; BLACK-HOLES; ASYMPTOTICALLY FLAT; MASS; TRANSFORMATIONS; PARAMETERS; SYMMETRY SO - Physical Review D 2002 ;65(8): 6043 UI - 10860 AU - Manko VS AU - Ruiz E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Salamanca, Area Fis Teor, E-37008 Salamanca, SpainManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - A remark on the mass-angular-momentum relation in the double-Kerr solution AB - A very simple relation between the coordinate distance, masses and angular momenta of two balancing Kerr particles is derived and compared with a recent approximate result published by Bonnor MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000176448300024 L2 - EQUATIONS SO - Classical and Quantum Gravity 2002 ;19(11):3077-3081 6044 UI - 10693 AU - Manning-Cela R AU - Gonzalez A AU - Swindle J AD - Infect Dis Res Inst, Seattle, WA 98104, USAIPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City 07738, DF, MexicoCSIC, Inst Parasitol & Biomed, Granada, SpainSwindle, J, Infect Dis Res Inst, 1124 Columbia St,Suite 600, Seattle, WA 98104 USA TI - Alternative splicing of LYT1 transcripts in Trypanosoma cruzi AB - As a result of alternative trans splicing, three distinct LYT1 mRNAs are produced in Trypanosoma cruzi, two encoding the full-length LYT1 protein and the third encoding a truncated LYT1 protein lacking a possible signal sequence. Analysis of the three mRNAs in different developmental forms of the parasite revealed that the alternative processing events were regulated differently during the parasite life cycle MH - Mexico|Distrito Federal MH - Spain MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 10 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000176909400090 L2 - PRE-MESSENGER-RNA; INTERGENIC REGIONS; POLYADENYLATION; BRUCEI; GENE; SITE SO - Infection and Immunity 2002 ;70(8):4726-4728 6045 UI - 10996 AU - Manske GGB AU - Ortiz-Monasterio JI AU - van Ginkel RM AU - Rajaram S AU - Vlek PLG AD - Univ Bonn, Ctr Dev Res, D-53113 Bonn, GermanyCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoManske, GGB, Univ Bonn, Ctr Dev Res, Walter Flex Str 3, D-53113 Bonn, Germany TI - Phosphorus use efficiency in tall, semi-dwarf and dwarf near-isogenic lines of spring wheat AB - The impact of the Rht dwarfing genes on P utilization efficiency (PUTE = grain dry matter per kg P in above-ground biomass), total P uptake (Pt) and related traits was studied in the varietal backgrounds of two tall wheat cultivars, Maringa and Nainari 60. Four sets of near-isogenic lines carrying different combinations of the alleles Rht-B1b, Rht-D1b and Rht-B1c for gibberellin-insensitive dwarfism in the hexaploid wheat (Triticum aestivum L.) were compared with tall controls in two field trials under conditions of adequate nutrient supply and irrigation in Northwest Mexico. The yield-increasing effect of the dwarfing genes Rht-D1b and Rht-B1b led to improved PUTE in Maringa and total P uptake in both cultivars. Also, the double dwarf line of Maringa had larger grain yields and P uptake compared to the tall control. The Rht-B1c genotypes showed low PUTE, thick roots and high P concentration in vegetative biomass indicating a surplus of assimilates and P, which could not be translocated into the grains. A similar problem could be observed in Nainari 60 with Rht-B1b and Rht-D1b, which produced the largest grain dry matter with the lowest P concentrations in grains although they showed high P accumulation in straw. Most of the net P uptake occurred before anthesis. P absorption after anthesis was more critical for the dwarf genotypes. For double dwarfs and Rht-B1c, respectively, only 3% and 21% of the total accumulated P at maturity was absorbed at post-anthesis. The grain P of the dwarf lines came more from P accumulated at pre-anthesis and translocated from the vegetative biomass into the grain. The pre-anthesis P accumulation was positively correlated with spikes per m(2) (r = 0.91), whereas post-anthesis P accumulation correlated better with grains per spike (r = 0.72), and thousand kernel weight (r = 0.51). P uptake efficiency played a secondary role under these non-P-limiting conditions, and differences in root length density were only slightly affected by Rht-genes MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000176034200013 L2 - dwarfing genes;phosphorus uptake;roots;spring wheat;utilization;YIELD; SEMIDWARF; NITROGEN; MEXICO; HEIGHT; ROOT SO - Euphytica 2002 ;125(1):113-119 6046 UI - 11697 AU - Manso-Silvan A AU - Fuentes-Cobas L AU - Martin-Palma RJ AU - Hernandez-Velez M AU - Martinez-Duart JM AD - Univ Autonoma Madrid, Dept Fis Aplicada, E-28049 Madrid, SpainCIMA, Lab Ceram Piezoelect, Chihuahua 31110, MexicoManso-Silvan, A, Univ Autonoma Madrid, Dept Fis Aplicada, E-28049 Madrid, Spain TI - BaTiO3 thin films obtained by sol-gel spin coating AB - BaTiO3 thin film deposition techniques are the subject of many research studies mainly due to their influence on the optical and electrical properties of this material. which are of increasing interest for the processing of opto- and microelectronic devices. In this work, BaTiO3 thin films were grown onto silicon substrates by using a sol-gel spin coating procedure from Ba(OH)(2) and tetraisopropyl-orthotitanate (TIPT)-based precursors. The as-grown films were annealed at different temperatures. Both the preparation of the starting solutions through a multi-step process together with an activation energy reached by sintering at approximately 800 degreesC, were the most important parameters necessary to obtain the ferroelectric phase in these films. The evolution of the network bonds and the structural characterization of the films was studied by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) techniques, respectively. In order to ascertain the suitability of BaTiO3 films for the processing of electronic devices. the electrical behaviour (I-V curves) of different thin films was also determined. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Chihuahua MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000174011400026 L2 - ferroelectrics;sol-gel;BaTiO3;thin films;BARIUM-TITANATE; DEPOSITION SO - Surface & Coatings Technology 2002 ;151():118-121 6047 UI - 8024 AU - Manzanilla-Lopez RH AU - Costilla MA AU - Doucet M AU - Inserra RN AU - Lehman PS AU - del Prado-Vera IC AU - Souza RM AU - Evans K AD - Coll Postgrad, Montecillo, MexicoEstac Expt Agro Ind Obispo Columbres, RA-4101 Las Talitas, Tucuman, ArgentinaUniv Nacl Cordoba, Nematol Lab, RA-5000 Cordoba, ArgentinaPROINPA, Proyecto MIP, Cochabamba 4285, BoliviaFlorida Dept Agr & Consumer Serv, DPI, Nematol Sect, Gainesville, FL 32614, USAManzanilla-Lopez, RH, Coll Postgrad, Km 35-5 Carretera Mexico Texcoco, Montecillo, Mexico TI - The genus Nacobbus Thorne & Allen, 1944 (Nematoda : Pratylenchidae): Systematics, distribution, biology and management AB - The two known species of Nacobbus, N. aberrans and N. dorsalis, are sedentary root endoparasites that occur in the Americas. The parasitic habits of these two so-called "false root-knot nematode" species include similarities to both root lesion and root-knot nematodes. The migratory and vermiform juveniles and immature adults behave like lesion nematodes, causing cavities and lesions inside the root tissues, whereas the mature females are sedentary and obese and induce root galls and specialized feeding sites as do true root-knot nematodes. Limited information is available on the less well-known species X dorsalis, which is present only in California where it has negligible economic importance and parasitizes only a few non-cultivated plants without evidence of attack on agricultural crops. In contrast, many studies have examined the biology, economic impact, and management of the more economically important N. aberrans, which occurs in temperate and subtropical latitudes of North and South America. This false root-knot (or potato rosary) nematode has a wide host range, which includes at least 84 plant species. Many common weeds are good hosts. The results of host and field studies conducted in North and South America indicate that N. aberrans populations can be separated into bean, potato and sugarbeet groups. The populations of each group have distinct host preferences and do not reproduce on graminaceous species or on leguminous species of the genera Medicago and Lupinus. The yield losses reported on staple and industrial crops infected by N. aberrans average 65% for potato in the Andean region of Latin America, 55% and 36% for tomato and bean in Mexico, respectively, and 10-20% for sugarbeet in the United States (Nebraska). Different levels of resistance, varying according to the nematode population, have been found in bean, chilli pepper, potato, and tomato. Most research on crop rotation, mixed cropping, and chemical and non-chemical strategies for management of N. aberrans has been conducted on bean, chilli pepper, and tomato in Mexico, potato in Argentina, Bolivia and Peru, and sugarbeet in the United States MH - Argentina MH - Bolivia MH - Mexico|Estado De Mexico MH - USA PB - AUBURN: ORGANIZATION TROP AMER NEMATOLOGISTS RP - NOT IN FILE U3 - TC 8 U4 - Zoology U5 - J;Review AV - English IS - 0099-5444 UR - ISI:000183919800006 L2 - biology;diagnostics;distribution;false root-knot nematode;histopathology;host range;life cycle;management;morphology;Nacobbus aberrans;Nacobbus dorsalis;potato rosary nematode;quarantine;races;systematics;thermal requirements;yield losses;PLANT-PARASITIC NEMATODES; ROOT-KNOT NEMATODE; N-ABERRANS THORNE; MELOIDOGYNE-JAVANICA; LIFE-CYCLE; HETERODERA-SCHACHTII; POPULATION-DYNAMICS; DISEASE PROGRESSION; TOMATO ROOTS; RESISTANCE SO - Nematropica 2002 ;32(2):149-227 6048 UI - 10979 AU - Manzotti A AU - Perez FJ AU - Quiroz AJ AD - Univ Metropolitana, Caracas, VenezuelaUniv Guanajuato, Guanajuato, MexicoUniv Simon Bolivar, Caracas, VenezuelaManzotti, A, Univ Metropolitana, Caracas, Venezuela TI - A statistic for testing the null hypothesis of elliptical symmetry AB - We present and study a procedure for testing the null hypothesis of multivariate elliptical symmetry. The procedure is based on the averages of some spherical harmonics over the projections of the scaled residual (1978, N. J. H. Small, Biometrika 65, 657-658) of the d-dimensional data on the unit sphere of R-d. We find, under mild hypothesis, the limiting null distribution of the statistic presented, showing that, for an appropriate choice of the spherical harmonics included in the statistic, this distribution does not depend on the parameters that characterize the underlying elliptically symmetric law. We describe a bivariate simulation study that shows that the finite sample quantiles of our statistic converge fairly rapidly, with sample size, to the theoretical limiting quantiles and that our procedure enjoys good power against several alternatives. (C) 2001 Elsevier Science (USA) MH - Mexico|Guanajuato MH - Venezuela PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0047-259X UR - ISI:000176009300006 L2 - elliptically contoured distributions;spherical harmonics;quadratic forms;empirical processes;MULTIVARIATE DISTRIBUTION; SPHERICAL-SYMMETRY SO - Journal of Multivariate Analysis 2002 ;81(2):274-285 6049 UI - 10205 AU - Marchant R AU - Almeida L AU - Behling H AU - Berrio JC AU - Bush M AU - Cleef A AU - Duivenvoorden J AU - Kappelle M AU - De Oliveira P AU - de Oliveira AT AU - Lozano-Garcia S AU - Hooghiemstra H AU - Ledru MP AU - Ludlow-Wiechers B AU - Markgraf V AU - Mancini V AU - Paez M AU - Prieto A AU - Rangel O AU - Salgado-Labouriau ML AD - Univ Amsterdam, Fac Sci, Inst Biodivers & Ecosyst Dynam, NL-1098 SM Amsterdam, NetherlandsUniv Nacl Autonoma Mexico, Lab Biogeog, Fac Ciencias, Mexico City 04510, DF, MexicoCtr Trop Maritime Ecol, D-28359 Bremen, GermanyFlorida Inst Technol, Dept Biol Sci, Melbourne, FL 32905, USAInst Nacl Biodiversidad, INBio, Santo Domingo De Heredia, Costa RicaUniv Sao Paulo, Inst Geociencias, DPE, BR-05422970 Sao Paulo, BrazilUniv Fed Lavras, Dept Ciencias Florestais, BR-37200000 Lavras, MG, BrazilUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoInst Geociencias, Dept Paleontol & Estratigrafia, BR-05422970 Sao Paulo, BrazilUniv Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309, USAUniv Nacl Mar Plata, Fac Ciencias Exactas & Nat, Lab Paleocol & Palinol, RA-7600 Mar Del Plata, ArgentinaUniv Nacl Colombia, Inst Ciencias Nat, Bogota, ColombiaUniv Brasilia, Inst Geociencias, Brasilia, DF, BrazilMarchant, R, Univ Amsterdam, Fac Sci, Inst Biodivers & Ecosyst Dynam, Kruislaan 318, NL-1098 SM Amsterdam, Netherlands TI - Distribution and ecology of parent taxa of pollen lodged within the Latin American Pollen Database AB - The cornerstone of palaeoecological research, concerned with vegetation dynamics over the recent geological past, is a good understanding of the present-day ecology and distribution of the taxa. This is particularly necessary in areas of high floral diversity such as Latin America. Vegetation reconstructions, based on numerous pollen records, now exist with respect to all major vegetation associations from Latin America. With this ever-increasing number of sedimentary records becoming available, there is a need to collate this information and to provide information concerning ecology and distribution of the taxa concerned. The existing Latin American Pollen Database (LAPD) meets the first of these needs. Information concerning the ecology and distribution of the parent taxa responsible for producing the pollen, presently lodged within the LAPD, is the focus of this paper. The 'dictionary' describes the ecology and distribution of the parent taxa responsible for producing pollen identified within sedimentary records. These descriptions are based on a wide range of literature and extensive discussions with members of the palaeoecological community working in different parts of Latin America investigating a range of different vegetation types. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Costa Rica MH - Germany MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences;Paleontology U5 - J;Review AV - English IS - 0034-6667 UR - ISI:000178121400001 L2 - biome;distribution;ecology;Latin American Pollen Database;pollen;NEOTROPICAL RAIN-FOREST; HIGH TEMPERATE ANDES; SPECIES RICHNESS; CENTRAL CHILE; COSTA-RICA; FLORISTIC COMPOSITION; POLLINATION ECOLOGY; VEGETATION CHANGES; PARAMO VEGETATION; BRAZILIAN AMAZON SO - Review of Palaeobotany and Palynology 2002 ;121(1):1-75 6050 UI - 11528 AU - Margitfalvi JL AU - Fasi A AU - Hegedus M AU - Lonyi F AU - Gobolos S AU - Bogdanchikova N AD - Hungarian Acad Sci, Inst Chem, Chem Res Ctr, H-1025 Budapest, HungaryUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoMargitfalvi, JL, Hungarian Acad Sci, Inst Chem, Chem Res Ctr, Pusztaszeri Ut 59-67, H-1025 Budapest, Hungary TI - Au/MgO catalysts modified with ascorbic acid for low temperature CO oxidation AB - Au/Mg(OH)(2) catalyst was modified with different amounts of ascorbic acid. After dehydration at 350degreesC, in various atmospheres, the modified Au/MgO catalysts were characterized and tested in the oxidation of CO. It has been shown for the first time that at high CO pressure supported gold chemisorbs CO and the apparent gold dispersion can be determined. The oxidation of CO was investigated in the temperature range between -30 and 250 degreesC using both temperature-programmed oxidation technique and time on stream experiments. A characteristic feature of Au/MgO catalysts is the decrease of the activity upon increasing the reaction temperature from -30 to 110-120 degreesC. The results showed that the introduction of ascorbic acid had a definite positive effect on the activity of Au/MgO catalyst in low temperature CO oxidation. This effect strongly depended on the amount of ascorbic acid introduced and had a distinct optimum. Based on diffuse reflection UV-VIS and in situ FTIR spectroscopic data it is suggested that the addition of ascorbic acid (i) slightly alters the (ionic gold)/(metallic gold) ratio in both the parent (Au/Mg(OH)(2)) and the working catalysts (Au/MgO) and (ii) suppresses the carbonate formation responsible for the deactivation, It is proposed that the activation of CO requires the formation of "(Audelta+)(m)-Au-n" ensemble sites, in which the ionic gold is involved in the activation of CO molecule via Audelta+-carbonyl oxygen interaction. (C) 2002 Elsevier Science B.V. All rights reserved MH - Hungary MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 35 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000174755600019 L2 - Au/MgO catalyst;CO oxidation;low temperature oxidation;catalyst modification;ascorbic acid;CARBON-MONOXIDE OXIDATION; SUPPORTED GOLD CATALYSTS; SN-PT/SIO2 CATALYSTS; AU/TIO2 CATALYSTS SO - Catalysis Today 2002 ;72(1-2):157-169 6051 UI - 10608 AU - Marimuthu G AU - Rajan KE AU - Kandula S AU - Parsons S AU - Jones G AD - Madurai Kamaraj Univ, Sch Biol Sci, Dept Anim Behav & Physiol, Madurai 625021, Tamil Nadu, IndiaUniv Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, EnglandNatl Univ Autonomous Mexico, Inst Biotechnol, Dept Mol Recognit & Biostruct, Cuernavaca 62250, Morelos, MexicoMarimuthu, G, Madurai Kamaraj Univ, Sch Biol Sci, Dept Anim Behav & Physiol, Madurai 625021, Tamil Nadu, India TI - Effects of different surfaces on the perception of prey-generated noise by the Indian false vampire bat Megaderma lyra AB - The low- and high-frequency components of a rustling sound, created when prey (freshly killed frog) was jerkily pulled on dry and wet sandy floors and asbestos, were recorded and played back to individual Indian false vampire bats (Megaderma lyra). Megaderma lyra responded with flight toward the speakers and captured dead frogs, that were kept as reward. The spectral peaks were at 8.6, 7.1 and 6.8 kHz for the low-frequency components of the sounds created at the dry, asbestos and wet floors, respectively. The spectral peaks for the high-frequency sounds created on the respective floors were at 36.8, 27.2 and 23.3 kHz. The sound from the dry floor was more intense than that of from the other two substrata. Prey movements that generated sonic or ultrasonic sounds were both sufficient and necessary for the bats to detect and capture prey. The number of successful prey captures was significantly greater for the dry floor sound, especially to its high-frequency components. Bat-responses were low to the wet floor and moderate to the asbestos floor sounds. The bats did not respond to the sound of unrecorded parts of the tape. Even though the bats flew toward the speakers when the prey generated sounds were played back and captured the dead frogs we cannot rule out the possibility of M. lyra using echolocation to localize prey. However, the study indicates that prey that move on dry sandy floor are more vulnerable to predation by M. lyra MH - United Kingdom MH - India MH - Mexico|Morelos PB - WARSAW: POLISH ACAD OF SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 1508-1109 UR - ISI:000177124900003 L2 - Megaderma lyra;gleaning;passive sound localization;prey detection;PASSIVE SOUND-LOCALIZATION; FEEDING-BEHAVIOR; EARED BATS; ECHOLOCATION; CHIROPTERA; VESPERTILIONIDAE; PREDATION; STRATEGY; PALLIDUS SO - Acta Chiropterologica 2002 ;4(1):25-32 6052 UI - 10014 AU - Marin E AU - Marin-Antuna J AU - az-Arencibia P AD - Univ La Habana, Fac Fis, Havana, CubaInst Politecn Nacl, CINVESTAV, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMarin, E, Univ La Habana, Fac Fis, San Lazaro & L Vedado 10400, Havana, Cuba TI - On the wave treatment of the conduction of heat in photothermal experiments with solids AB - In this paper we discuss the conduction of heat in solids excited by a periodically time-dependent source, commonly encountered in photothermal experiments. In the analysis, we take into account the relaxation time necessary for the onset of the heat flux which leads to a second time derivative in the heat diffusion equation. It is shown that there exists a critical modulation frequency at which the heat flux changes its diffusive character to a wave propagation process with the velocity of sound. Evidence is provided for the possibility of detecting second sound in solids by means of a photothermal experiment MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0143-0807 UR - ISI:000178695800009 SO - European Journal of Physics 2002 ;23(5):523-532 6053 UI - 10893 AU - Marionneau S AU - Ruvoen N AU - Le Moullac-Vaidye B AU - Clement M AU - Cailleau-Thomas A AU - Ruiz-Palacois G AU - Huang PW AU - Jiang X AU - Le Pendu J AD - INSERM U419, Inst Biol, F-44093 Nantes, FranceEcole Natl Vet, Nantes, FranceEastern Virginia Med Sch, Childrens Hosp Kings Daughters, Norfolk, VA 23501, USAInst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoLe Pendu, J, INSERM U419, Inst Biol, 9 Quai Moncousu, F-44093 Nantes, France TI - Norwalk virus binds to histo-blood group antigens present on gastroduodenal epithelial cells of secretor individuals AB - Background & Aims: Norwalk Virus (NV) is a member of the Caliciviridae family, which causes acute epidemic gastroenteritis in humans of all ages and its cellular receptors have not yet been characterized. Another calicivirus, Rabbit Hemorrhagic Disease Virus, attaches to H type 2 histo-blood group oligosaccharide present on rabbit epithelial cells. Our aim was to test if, by analogy, recombinant NV-like particles (rNV VLPs) use carbohydrates present on human gastroduodenal epithelial cells as ligands. Methods: Attachment of rNV VLPs was tested on tissue sections of the gastroduodenal junction and on saliva from individuals of known ABO, Lewis, and secretor phenotypes. It was also tested on human Caco-2 cells and on animal cell lines transfected with glycosyl-transferases complementary DNA (cDNA). Competition experiments were performed with synthetic oligosaccharides and anticarbohydrate antibodies. Internalization was monitored by confocal microscopy. Results: Attachment of rNV VLPs to surface epithelial cells of the gastroduodenal junction as well as to saliva was detected, yet only from secretor donors. It was abolished by alpha1,2fucosidase treatment, and by competition with the H types 1 and 3 trisaccharides or with anti-H type I and anti-H types 3/4 antibodies. Transfection of CHO and TS/A cells with an alpha1,2fucosyltransferase cDNA allowed attachment of VLPs. These transfectants as well as differentiated Caco-2 cells expressing H type 1 structures internalized the bound particles. Conclusions: rNV VLPs use H type 1 and/or H types 3/4 as ligands on gastroduodenal epithelial cells of secretor individuals MH - France MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 72 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0016-5085 UR - ISI:000176280300029 L2 - HEMORRHAGIC-DISEASE VIRUS; MONOCLONAL-ANTIBODIES; SIALIC-ACID; ENTERIC CALICIVIRUSES; VIRAL GASTROENTERITIS; CELLULAR RECEPTOR; EXPRESSION; OUTBREAK; PROTEIN; EPIDEMIOLOGY SO - Gastroenterology 2002 ;122(7):1967-1977 6054 UI - 10651 AU - Mariscal R AU - Rojas S AU - Gomez-Cortes A AU - Diaz G AU - Perez R AU - Fierro JLG AD - CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, SpainUNAM, Inst Phys, Dept Phys Chem, Mexico City 01000, DF, MexicoFierro, JLG, CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain TI - Support effects in Pt/TiO2-ZrO2 catalysts for NO reduction with CH4 AB - ZrO2-TiO2 mixed oxides, prepared using the sol-gel method, were used as supports for platinum catalysts. The effects of catalyst pre-reduction and surface acidity on the performance of Pt/ZT catalysts for the reduction of NO with CH4 were studied. The diffuse reflectance infrared Fourier transformed (DRIFT) spectra of CO adsorbed on the Pt/ZT catalysts, and also on the Pt/T and Pt/Z references, pre-reduced at 773 K in hydrogen, revealed that an SMSI state is developed in the Ti-rich oxide-supported platinum catalysts. However, no shift in the binding energy of Pt 4f(7/2) level for Pt/T and Pt deposited on Ti-rich support counterparts pre-reduced at 773 K was found by photoelectron spectroscopy. The DRIFT spectra of the catalysts under the NO+O-2 co-adsorption revealed the appearance of nitrite/nitrate species on the surface of the Zr-containing catalysts, which displayed acidic properties, but were almost absent in the Pt/T catalyst. The intensity of these bands reached a maximum for the Pt/ZT(1:1) catalyst, which in turn exhibited a larger specific area. In the absence of oxygen in the feed stream, the NO + CH4 reaction showed DRIFT spectra assigned to surface isocyano species. Since the intensity of this band is higher for the Pt/ZT (9:1) catalyst, it seems that such species are developed at the Pt-support interface. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000176981900052 L2 - emission control;nitrogen oxides;selective catalytic reduction;methane;Pt/ZrO2-TiO2 catalysts;SELECTIVE REDUCTION; EXCESS OXYGEN; METHANE; SPECTROSCOPY; ZEOLITE; IR SO - Catalysis Today 2002 ;75(1-4):385-391 6055 UI - 11404 AU - Markow TA AU - Castrezana S AU - Pfeiler E AD - Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USACtr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Sonora 85480, MexicoArizona State Univ, Dept Biol, Tempe, AZ 85287, USAMarkow, TA, Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA TI - Flies across the water: Genetic differentiation and reproductive isolation in allopatric desert Drosophila AB - Between sister species of Drosophila, both pre- and postzygotic reproductive isolation commonly appear by the time a Nei's genetic distance of 0.5 is observed. The degree of genetic differentiation present when allopatric populations of the same Drosophila species exhibit incipient reproductive isolation has not been systematically investigated. Here we compare the relationship between genetic differentiation and pre- and postzygotic isolation among allopatric populations of three cactophilic desert Drosophila: D. mettleri, D. nigrospiracula, and D. mojavensis. The range of all three is interrupted by the Gulf of California, while two species, D. mettleri and D. mojavensis, have additional allopatric populations residing on distant Santa Catalina Island, off the coast of southern California. Significant population structure exists within all three species, but only for allopatric populations of D. mojavensis is significant isolation at the prezygotic level observed. The genetic distances for the relevant populations of D. mojavensis were in the range of 0.12, similar to that for D. mettleri whose greatest D = 0.11 was unassociated with any form of isolation. These observations suggest further investigations of Drosophila populations with genetic distances in this range be undertaken to identify any potential patterns in the relationship between degree of genetic differentiation and the appearance of pre- and/or postzygotic isolation MH - USA MH - Mexico|Sonora PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000175040500010 L2 - allozymes;Drosophila mettleri;D. nigrospiracula;population structure;reproductive isolation;CACTOPHILIC DROSOPHILA; COURTSHIP BEHAVIOR; MITOCHONDRIAL-DNA; SEXUAL ISOLATION; MOJAVENSIS; POPULATIONS; SPECIATION; EVOLUTION; PATTERNS SO - Evolution 2002 ;56(3):546-552 6056 UI - 11597 AU - Marmolejo F AU - Rosebrugh RD AU - Wood RJ AD - Inst Matemat, Area Invest Cientif, Circuito Exterior, Mexico City 04510, DF, MexicoMt Allison Univ, Dept Math & Comp Sci, Sackville, NB E4L 1E6, CanadaDalhousie Univ, Dept Math & Stat, Halifax, NS B3H 3J5, CanadaMarmolejo, F, Inst Matemat, Area Invest Cientif, Circuito Exterior, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A basic distributive law AB - We pursue distributive laws between monads, particularly in the context of KZ-doctrines, and show that a very basic distributive law has (constructively) completely distributive lattices for its algebras. Moreover, the resulting monad is shown to be also the double dualization monad (with respect to the subobject classifier) on ordered sets. (C) 2001 Published by Elsevier Science B.V MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000174334400007 L2 - CONSTRUCTIVE COMPLETE-DISTRIBUTIVITY SO - Journal of Pure and Applied Algebra 2002 ;168(2-3):209-226 6057 UI - 9682 AU - Marquez LA AU - Moog C AU - Velasco-Villa M AD - CICESE, Dept Elect & Telecommun, San Diego, CA 92143, USACNRS, UMR 6597, IRCCyN, F-44321 Nantes 3, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Elect Engn, Mechatron Sect, Mexico City 07000, DF, MexicoMarquez, LA, CICESE, Dept Elect & Telecommun, POB 434944, San Diego, CA 92143 USA TI - Observatility and observers for nonlinear systems with time delays AB - Basic properties on linearization by output injection are investigated in this paper. A special structure is sought which is linear up to a suitable output injection and under a suitable change of coordinates. It is shown how an observer may be designed using theory available for linear time delay systems MH - USA MH - France MH - Mexico|Distrito Federal PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000179608100004 L2 - CONTROLLER SO - Kybernetika 2002 ;38(4):445-456 6058 UI - 9507 AU - Marroquin JL AU - Vemuri BC AU - Botello S AU - Calderon F AD - Ctr Invest Matemat, Guanajuato 36000, MexicoUniv Florida, Dept Comp & Informat Sci & Engn, Gainesville, FL 32611, USAUniv Michoacana San Nicolas Hidalgo, Div Estudios Postgrado, Morelia, Michoacan, MexicoMarroquin, JL, Ctr Invest Matemat, Apdo Postal 402, Guanajuato 36000, Mexico TI - An accurate and efficient Bayesian method for automatic segmentation of brain MRI AB - Automatic 3D segmentation of the brain from MR scans is a challenging problem that has received enormous amount of attention lately. Of the techniques reported in literature, very few are fully automatic. In this paper, we present an efficient and accurate, fully automatic 3D segmentation procedure for brain MR scans. It has several salient features namely, (1) instead of a single multiplicative bias field that affects all tissue intensities, separate parametric smooth models are used for the intensity of each class. This may be a more realistic model and avoids the need for a logarithmic transformation. (2) A brain atlas is used in conjunction with a robust registration procedure to find a non-rigid transformation that maps the standard brain to the specimen to be segmented. This transformation is then used to: segment the brain from non-brain tissue, compute prior probabilities for each class at each voxel location and find an appropriate automatic initialization. (3) Finally, a novel algorithm is presented which is a variant of the EM procedure, that incorporates a fast and accurate way to find optimal segmentations, given the intensity models along with the spatial coherence assumption. Experimental results with both synthetic and real data are included, as well as comparisons of the performance of our algorithm with that of other published methods MH - Mexico|Guanajuato MH - Mexico|Michoacan MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000180067300038 L2 - IMAGES; ALGORITHM; VISION SO - Computer Vision - Eccv 2002, Pt Iv 2002 ;2353():560-574 6059 UI - 9751 AU - Marroquin JL AU - Vemuri BC AU - Botello S AU - Calderon F AU - Fernandez-Bouzas A AD - Univ Florida, Dept Comp & Informat Sci & Engn, Gainesville, FL 32611, USAUniv Michoacana San Nicolas de Hidalgo, Fac Ingn Elect, Div Estud Posgrado, Morelia, Michoacan, MexicoCtr Invest Matemat, Guangjuato 36000, MexicoUNAM, Ctr Neurobiol, Juriquilla 76001, Qro, MexicoVemuri, BC, Univ Florida, Dept Comp & Informat Sci & Engn, Gainesville, FL 32611 USA TI - An accurate and efficient Bayesian method for automatic segmentation of brain MRI AB - Automatic three-dimensional (3-D) segmentation of the brain from magnetic resonance (MR) scans is a challenging problem that has received an enormous amount of attention lately. Of the techniques reported in the literature, very few are fully automatic. In this paper, we present an efficient and accurate, fully automatic 3-D segmentation procedure for brain MR scans. It has several salient features; namely, the following. 1) Instead of a single multiplicative bias field that affects all tissue intensities, separate parametric smooth models are used for the intensity of each class. 2) A brain atlas is used in conjunction with a robust registration procedure to find a nonrigid transformation that maps the standard brain to the specimen to be segmented. This transformation is then used to: segment the brain from nonbrain tissue; compute prior probabilities for each class at each voxel location and find an appropriate automatic initialization. 3) Finally, a novel algorithm is presented which is a variant of the expectation-maximization procedure, that incorporates a fast and accurate way to find optimal segmentations, given the intensity models along with the spatial coherence assumption. Experimental results with both synthetic and real data are included, as well as comparisons of the performance of our algorithm with that of other published methods MH - USA MH - Mexico|Guanajuato MH - Mexico|Michoacan MH - Mexico|Queretaro PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 30 U4 - Computer Science, Interdisciplinary Applications;Engineering, Biomedical;Engineering, Electrical & Electronic;Imaging Science & Photographic Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0278-0062 UR - ISI:000179502400009 L2 - Bayes procedures;biomedical magnetic resonance imaging;hidden Markov models;image registration;image segmentation;IMAGES; ALGORITHM; FIELD; RECONSTRUCTION; PARALLEL; VISION SO - Ieee Transactions on Medical Imaging 2002 ;21(8):934-945 6060 UI - 10419 AU - Marsch-Martinez N AU - Greco R AU - Van Arkel G AU - Herrera-Estrella L AU - Pereira A AD - Plant Res Int, NL-6700 AA Wageningen, NetherlandsInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Guanajuato, MexicoPereira, A, Plant Res Int, POB 16, NL-6700 AA Wageningen, Netherlands TI - Activation tagging using the En-I maize transposon system in Arabidopsis AB - A method for the generation of stable activation tag inserts was developed in Arabidopsis using the maize (Zen mays) En-I transposon system. The method employs greenhouse selectable marker genes that are useful to efficiently generate large populations of insertions. A population of about 8,300 independent stable activation tag inserts has been produced. Greenhouse-based screens for mutants in a group of plants containing about 2,900 insertions revealed about 31 dominant mutants, suggesting a dominant mutant frequency of about 1%. From the first batch of about 400 stable insertions screened in the greenhouse, four gain-in-function, dominant activation-tagged, morphological mutants were identified. A novel gain-in-function mutant called thread is described, in which the target gene belongs to the same family as the YUCCA flavin-mono-oxygenase that was identified by T-DNA activation tagging. The high frequency of identified gain-in-function mutants in the population suggests that the En-I system described here is an efficient strategy to saturate plant genomes with activation tag inserts. Because only a small number of primary transformants are required to generate an activation tag population, the En-I system appears to be an attractive alternative to study plant species where the present transformation methods have low efficiencies MH - Mexico|Guanajuato MH - Netherlands PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 42 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000177502100014 L2 - ASYMMETRIC INTERLACED PCR; FUNCTIONAL GENOMICS; PHENYLPROPANOID BIOSYNTHESIS; HERBICIDE-RESISTANCE; ZEA-MAYS; GENE; DNA; THALIANA; EXPRESSION; PLANTS SO - Plant Physiology 2002 ;129(4):1544-1556 6061 UI - 9332 AU - Marschang RE AU - Donahoe S AU - Manvell R AU - Lemos-Espinal J AD - Univ Giessen, Inst Avian & Reptile Med, D-35390 Giessen, GermanyPoint Defiance Zoo & Aquarium, Tacoma, WA 98407, USAVet Labs Agcy, Addlestone KT15 3NB, Surrey, EnglandUniv Nacl Autonoma Mexico, Ecol Lab, Unidad Biol Technol & Prototipos, Tlalnepantla, Estado De Mexic, MexicoMarschang, RE, Univ Hohenheim, Inst Environm & Anim Hyg 460, Garbenstr 30, D-70599 Stuttgart, Germany TI - Paramyxovirus and reovirus infections in wild-caught Mexican lizards (Xenosaurus and Abronia spp.) AB - Virus isolation attempts were carried out on wild-caught Xenosaurus grandis, X. platyceps, and Abronia graminea from Mexico. These animals were also tested for exposure to paramyxoviruses and reoviruses. Pharyngeal and cloacal swabs were collected from 30 lizards, and blood was collected from 23 lizards. A cytopathogenic virus was isolated from the cloacal swab of one of the X. platyceps. The isolate was identified as a paramyxovirus on the basis of its sensitivity to chloroform, resistance to 5-iodo-2'-deoxyuridine, size and morphology of the viral particles, hemagglutination of chicken erythrocytes, and serologic reaction with paramyxovirus-specific antisera. Antibodies against the paramyxovirus isolated in this study were found in four animals from three species. Antibodies against a different paramyxovirus isolated from a monitor lizard were found in seven animals from three species, showing that all the species tested are susceptible to paramyxovirus infections. Antibodies to a reptilian reovirus were found in three of the X. grandis MH - United Kingdom MH - Germany MH - Mexico|Estado De Mexico MH - USA PB - MEDIA: AMER ASSOC ZOO VETERINARIANS RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 1042-7260 UR - ISI:000180504000003 L2 - paramyxovirus;reovirus;Xenosaurus;Abronia;lizard;serology;virus isolation;OPHIDIAN PARAMYXOVIRUS; SNAKES; VIRUS; COLLECTION; PNEUMONIA SO - Journal of Zoo and Wildlife Medicine 2002 ;33(4):317-321 6062 UI - 11361 AU - Marti J AU - Mirabel IF AU - Rodriguez LF AU - Smith IA AD - Univ Jaen, Escuela Politecn Super, Dept Fis, Jaen, SpainCSIC, Inst Astrofis Andalucia, Granada, SpainCtr Etud Saclay, Serv Astrophys, CEA, DSM,DAPNIA, F-91191 Gif Sur Yvette, FranceInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoRice Univ, Dept Phys & Astron, Houston, TX 77005, USAMarti, J, Univ Jaen, Escuela Politecn Super, Dept Fis, Virgen Cabeza 2, Jaen, Spain TI - Radio images of the microquasar GRS 1758-258 AB - We present sensitive images of the microquasar GRS 1758-258 at two different radio wavelengths. The positions, flux densities and spectral indices of the central source and the extended radio lobes are reported. Our results confirm the synchrotron nature of the radio lobes. We also present a very deep radio image of the jet flow at arcminute scales. The source VLA-C, previously proposed as the exciting source of the system, is found to coincide with the Chandra position MH - Argentina MH - France MH - Mexico|Michoacan MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000175132400017 L2 - stars : individual : GRS 1758-258;stars : winds, outflows;GRS-1758-258; COUNTERPART SO - Astronomy & Astrophysics 2002 ;386(2):571-575 6063 UI - 11497 AU - Martin DF AU - Sierra-Madero J AU - Walmsley S AU - Wolitz RA AU - Macey K AU - Georgiou P AU - Robinson CA AU - Stempien MJ AD - Emory Univ, Sch Med, Dept Ophthalmol, Atlanta, GA 30322, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infect Dis, Mexico City, DF, MexicoUniv Toronto, Toronto Gen Hosp, Dept Med, Toronto, ON M5G 1L7, CanadaKaiser Permanente, Dept Ophthalmol, San Francisco, CA, USARoche Pharmaceut, Welwyn Garden City, Herts, EnglandRoche Pharmaceut, Palo Alto, CA, USAMartin, DF, Emory Univ, Sch Med, Dept Ophthalmol, 1365B Clifton Rd NE, Atlanta, GA 30322 USA TI - A controlled trial of valganciclovir as induction therapy for cytomegalovirus retinitis AB - Background: Valganciclovir is an orally administered prodrug that is rapidly hydrolyzed to ganciclovir. We compared the effects of oral valganciclovir with those of intravenous ganciclovir as induction therapy for newly diagnosed cytomegalovirus retinitis in 160 patients with the acquired immunodeficiency syndrome (AIDS). Methods: The primary end point was photographically determined progression of cytomegalovirus retinitis within four weeks after the initiation of treatment. Secondary end points included the achievement of a prospectively defined satisfactory response to induction therapy and the time to progression of cytomegalovirus retinitis. After four weeks, all patients received valganciclovir as maintenance therapy. Results: Eighty patients were randomly assigned to each treatment group. Of the patients who could be evaluated, 7 of 70 assigned to intravenous ganciclovir (10.0 percent) and 7 of 71 assigned to oral valganciclovir (9.9 percent) had progression of cytomegalovirus retinitis during the first four weeks (difference in proportions, 0.1 percentage point; 95 percent confidence interval, -9.7 to 10.0). Forty-seven of 61 patients (77.0 percent) assigned to intravenous ganciclovir and 46 of 64 (71.9 percent) assigned to valganciclovir had a satisfactory response to induction therapy (difference in proportions, 5.2 percentage points; 95 percent confidence interval, -20.4 to 10.1). The median times to progression of retinitis were 125 days in the group assigned to intravenous ganciclovir and 160 days in the group assigned to oral valganciclovir. The mean values for the area under the curve for the ganciclovir dosage interval were similar at both induction doses and maintenance doses. The frequency and severity of adverse events were similar in the two treatment groups. Conclusions: Orally administered valganciclovir appears to be as effective as intravenous ganciclovir for induction treatment and is convenient and effective for the long-term management of cytomegalovirus retinitis in patients with AIDS MH - Canada MH - United Kingdom MH - USA MH - Mexico|Distrito Federal PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 91 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0028-4793 UR - ISI:000174880600004 L2 - RELEASE GANCICLOVIR IMPLANT; ORAL GANCICLOVIR; AIDS; PHARMACOKINETICS SO - New England Journal of Medicine 2002 ;346(15):1119-1126 6064 UI - 10677 AU - Martin M AU - Lefebvre R AU - Atabek O AD - BUAP, Fac Ciencias Computac, Puebla 72001, MexicoUniv Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, FranceUniv Paris 06, Unite Format & Rech Phys Fondamentale & Appl, F-75231 Paris, FranceMartin, M, BUAP, Fac Ciencias Computac, Puebla 72001, Mexico TI - Nonadiabatic tunneling in the presence of an oscillating field AB - Nonadiabatic tunneling is an effect occurring when two potentials are crossing each other with opposite slopes. It is characterized by the vanishing of the transmission probability at a set of energies (or nodes) that can be identified as the resonance energies of the system. We investigate the modification of this probability induced by the interaction of the particle with an oscillating field. The main result of this study is the presence of additional dips in the transmissivity, representing replicas of the nodal structure. They are due to processes implying an absorption (or emission) followed by an emission (or absorption) of one or even more than one quantum MH - France MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000176763600067 L2 - ELECTRON-SCATTERING; TRANSITIONS SO - Physical Review A 2002 ;65(6): 6065 UI - 11946 AU - Martinez-Barnetche J AU - Madrid-Marina V AU - Flavell RA AU - Moreno J AD - Inst Mexicano Seguro Social, Ctr Med Nacl XXI, Autoimmune Dis Res Unit, Mexico City 03020, DF, MexicoInst Nacl Salud Publ, Ctr Res Infect Dis, Dept Mol Virol, Cuernavaca, Morelos, MexicoYale Univ, Sch Med, Immunobiol Sect, Howard Hughes Med Inst, New Haven, CT 06520, USAMoreno, J, Inst Mexicano Seguro Social, Ctr Med Nacl XXI, Autoimmune Dis Res Unit, Apartado Postal 73-032, Mexico City 03020, DF, Mexico TI - Does CD40 ligation induce B cell negative selection? AB - Binding of CD154 to its receptor, CD40, provides costimulation for mature B cell activation and differentiation in response to Ag receptor signals. In mice, early B cell precursors express CD40, but its function at this stage is unknown. We examined the effects of CD40 ligation during B cell ontogeny in transgenic mice constitutively expressing CD154 on B cells (kappaEP-CD154). Precursors beyond pro-B cells were absent in adult bone marrow but were increased in the fetal liver. Newborn kappaEP-CD154 mice had largely increased numbers of peripheral B cells,which were CD154(+), and that 36 h after birth expressed high surface levels of CD23 and MHC class II, resembling activated mature B cells. Nevertheless, kappaEP-CD154 mice were hypogammaglobulinemic, indicating that the expanded population of apparently activated B cells was nonfunctional. Further analysis revealed that soon after birth, kappaEP-CD154 mice-derived B cells became CD5(+)/Fas(+), after which progressively decreased in the periphery in a CD154-CD40-dependent manner. These results indicate that CD40 ligation during B cell ontogeny induces negative selection characterized by either hyporesponsiveness or an arrest in maturation depending on the time of analysis and the anatomic site studied MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 5 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000173429300011 L2 - CD40-CD40 LIGAND INTERACTIONS; SYSTEMIC LUPUS-ERYTHEMATOSUS; IG-SECRETING CELLS; T-CELL; GENE-EXPRESSION; SWITCH RECOMBINATION; GERMINAL-CENTERS; LYMPHOCYTES; ACTIVATION; DIFFERENTIATION SO - Journal of Immunology 2002 ;168(3):1042-1049 6066 UI - 10176 AU - Martinez-Burnes J AU - Lopez A AU - Wright GM AU - Ireland WP AU - Wadowska DW AU - Dobbin GV AD - Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Dept Anat & Physiol, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Grad Studies & Res, Charlottetown, PE C1A 4P3, CanadaMartinez-Burnes, J, Univ Autonoma Tamaulipas, Fac Med Vet & Zootecn, Km 5 Carretera Victoria Mante, Tamaulipas 87000, Mexico TI - Microscopic changes induced by the intratracheal inoculation of amniotic fluid and meconium in the lung of neonatal rats AB - Meconium aspiration syndrome is a major contributor to neonatal respiratory distress in infants and it has been sporadically recognized in neonatal animals. This investigation was designed to study the short and long term effects of meconium and amniotic fluid in the lungs of neonatal rats. Seven-day-old rats (n=123) divided in three groups were intratracheally inoculated with saline solution, amniotic fluid or meconium. Rats were euthanatized on 1, 3, 7, 14, 28, 56 and 112 postinoculation days (PID) and the lungs were examined by light microscopy. Saline solution did not induce any change while amniotic fluid elicited only a mild foreign body response which disappeared by PID 14. In contrast, meconium induced an exudative alveolitis characterized by recruitment of neutrophilsn in the bronchoalveolar spaces. Meconium also induced atelectasis, hyperinflation and thickening of alveolar septa all of which had disappeared by PID 14. Starting at PID 7, neutrophils were progressively replaced by macrophages, giant cells, and some fibroblasts. There were sporadic foci of mineralization starting at PID 14 and lasting up to PID 112. Some mineralized foci became lined with cuboidal epithelial cells at PID 28. Meconium was slowly degraded but still evident by PID 112. It was concluded that inoculation of meconium in neonatal rats induces acute microscopic changes typical of meconium aspiration syndrome. The long term lesions induced by meconium consisted of persistent multifocal histiocytic alveolitis and bronchiolitis reaction with occasional foci of calcification MH - Canada MH - Mexico|Tamaulipas PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 7 U4 - Cell Biology;Pathology U5 - J;Article AV - English IS - 0213-3911 UR - ISI:000178234100008 L2 - lung;neonatal rats;amniotic fluid;meconium;aspiration;ASPIRATION SYNDROME; SURFACTANT; CALVES; SYSTEM SO - Histology and Histopathology 2002 ;17(4):1067-1076 6067 UI - 10734 AU - Martinez-Celorio RA AU - Barrientos B AU - Sanchez-Marin FJ AU - Lopez LM AU - Rayas JA AD - Ctr Invest Opt AC, Leon 37150, Gto, MexicoCtr Neurociencias Cuba, Havana 10600, CubaMartinez-Celorio, RA, Ctr Invest Opt AC, Apdo 1-948, Leon 37150, Gto, Mexico TI - Out-of-plane displacement measurement by electronic speckle pattern interferometry in presence of large in-plane displacement AB - We measured out-of-plane displacement in presence of large in-plane displacements and deformations by electronic speckle pattern interferometry (ESPI). By means of digital speckle photography (DSP) the large in-plane displacement is measured and then compensated by software from interferometric images, before calculating the phase distribution related to the out-of-plane deformation. This means that decorrelation effects are not present and that the use of intermediate images is not necessary. The optical phase was extracted by spatial phase shifting, which enables the study of rapid transient events. The proposed method was applied to different combinations of out-of-plane deformation and large in-plane displacement. The compensation of large in-plane displacement allows us to maintain the contrast of ESPI fringes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000176767400003 L2 - spatial phase stepping;digital speckle photography;ESPI SO - Optics Communications 2002 ;208(1-3):17-24 6068 UI - 11390 AU - Martinez-Garza C AU - Gonzalez-Montagut R AD - Natl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoHarvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138, USAMartinez-Garza, C, Univ Illinois, Dept Biol Sci, M-C 066,845 W Taylor St, Chicago, IL 60607 USA TI - Seed rain of fleshy-fruited species in tropical pastures in Los Tuxtlas, Mexico MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000174907100009 L2 - Cecropia obtusifolia;Ficus eugeniaefolia;Los Tuxtlas;natural regeneration;riparian forest;seed dispersal;tropical rain forest;FRUGIVOROUS BIRDS; ABANDONED PASTURE; FOREST; BATS; REGENERATION; DISPERSAL; DIVERSITY; AMAZONIA; PLANTS SO - Journal of Tropical Ecology 2002 ;18():457-462 6069 UI - 10522 AU - Martinez-Gonzalez D AU - Prospero-Garcia O AU - Mihailescu S AU - Drucker-Colin R AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurosci, Mexico City 04510, DF, MexicoMartinez-Gonzalez, D, WISPIC, Dept Psychiat, 6001 Res Pk Blvd, Madison, WI 53719 USA TI - Effects of nicotine on alcohol intake in a rat model of depression AB - Clinical studies suggest that depression facilitates alcohol abuse. Depressed individuals also have increased rates of smoking, and it has been suggested that nicotine may improve depression. It is therefore possible that nicotine may reduce alcohol use in depression. To investigate this potential relationship, we evaluated alcohol intake in an animal model of depression, which consists of administering clomipramine (CLI), a preferential serotonin reuptake inhibitor, to neonatal rats. This pharmacological manipulation produces adult depression-like behaviors, such as reduced aggressiveness, decreased pleasure seeking, diminished sexual activity, increased locomotor activity and increased REM sleep. In this study, we found that CLI rats exhibited significantly higher locomotor activity, lower aggressiveness and higher alcohol intake than control rats. Chronic administration of a low dose of nicotine (0.25 mg/kg/day) or a sham operation did not modify these behaviors. However, chronic administration of nicotine at a higher dose (1.5 mg/kg/day) significantly increased aggressive behavior and reduced alcohol intake in CLI rats. The effect of nicotine on alcohol intake lasted at least 1 month after cessation of nicotine administration. These results indicate that nicotine reverted some depression signs and reduce alcohol self-administration in the CLI model of depression. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Behavioral Sciences;Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0091-3057 UR - ISI:000177065200045 L2 - alcohol;depression;nicotine;animal model;MAJOR DEPRESSION; ANIMAL-MODEL; PREFERRING RATS; ACETYLCHOLINE-RECEPTORS; PSYCHIATRIC-DISORDERS; SEROTONERGIC SYSTEM; NEONATAL TREATMENT; SMOKING CESSATION; MENTAL-DISORDERS; SEXUAL-BEHAVIOR SO - Pharmacology Biochemistry and Behavior 2002 ;72(1-2):355-364 6070 UI - 9472 AU - Martinez-Guerrero E AU - Chabuel F AU - Daudin B AU - Rouviere JL AU - Mariette H AD - CEA Grenoble, Dept Rech Fondamentale Mat Condensee, CEA CNRS UJF Grp Nanophys & Semicond, F-38054 Grenoble, FranceUniv Grenoble 1, Spectrometrie Phys Lab, F-38041 Grenoble, FranceMartinez-Guerrero, E, Univ ITESO, Perifer Sur 8585, Tlaquepaque Jal 45090, Mexico TI - Control of the morphology transition for the growth of cubic GaN/AlN nanostructures AB - The Stransky-Krastanow growth mode of strained layers Which gives rise to a morphology transition from two-dimensional layer to three-dimensional islands, is studied in details for the cubic gallium nitride on cubic aluminum nitride (GaN/AlN) system grown by molecular beam epitaxy. Besides the lattice parameter mismatch which governs this transition, we evidence the importance of two other parameters, namely the substrate temperature and the III/V flux ratio. Tuning each of these two parameters enables to control the strain relaxation mechanism of a GaN deposited onto AlN, leading to the growth of either quantum wells or quantum dots. (C) 2002 American Institute of Physics. [DOI:10.1063/1.1527975] MH - France MH - Mexico|Jalisco PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000180160800007 L2 - MOLECULAR-BEAM EPITAXY; QUANTUM DOTS; GAN SO - Applied Physics Letters 2002 ;81(27):5117-5119 6071 UI - 11631 AU - Martinez-Martinez L AU - Bernal JS AD - Texas A&M Univ, Biol Control Lab, College Stn, TX 77843, USABernal, JS, COFAA, IPN, Ctr Desarrollo Prod Biot, Apartado Postal 24, Yautepec 62730, Morelos, Mexico TI - Ephestia kuehniella Zeller as a factitious host for Telenomus remus Nixon: Host acceptance and suitability AB - Telenomus remus Nixon is an egg parasitoid used against fall armyworm, Spodoptera frugiperda (J. E. Smith), in various countries of the Americas. The feasibility of rearing T remus at lower cost and greater efficiency on a novel host, Ephestia kuehniella Zeller, was addressed in a two-part study. The first part of the study compared acceptance of eggs of E. kuehniella, fall armyworm, and E. kuehniella with a kairomone from the accessory gland of fall army-worm females. Acceptance was assessed as residence time on eggs and parasitism rates. Females of T remus spent more time and showed higher parasitism rates on eggs of fall armyworm followed by those of E. kuehniella with kairomone, and E. kuehniella. The second part of the study compared the suitability of eggs of fall armyworm versus eggs of E. kuehniella for development of T. remus. Suitability was assessed by comparing various fitness components between parasitoids reared on fall armyworm and E. kuehniella. Compared to T remus reared on eggs of fall armyworm, those reared on eggs of E. kuehniella had longer egg to adult developmental times, shorter longevities, and reduced egg loads and adult sizes. In contrast, significant differences were not evident in levels of fluctuating asymmetry (lengths of hind tibiae and distances between apices of stigmata and hamular folds of forewings) between T. remus reared on eggs of fall armyworm or E. kuehniella. Longevity was not significantly correlated with adult size, or the correlation was poor, whereas egg load and adult size were significantly correlated in females reared both on fall armyworm and E. kuehniella MH - Mexico|Morelos MH - USA PB - TIFTON: GEORGIA ENTOMOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0749-8004 UR - ISI:000174307600002 L2 - augmentative biological control;insectary rearing;development;egg load;longevity;adult size;fluctuating asymmetry;fitness;FALL ARMYWORM LEPIDOPTERA; TRICHOGRAMMA-PRETIOSUM; FLUCTUATING ASYMMETRY; SPODOPTERA-FRUGIPERDA; HELIOTHIS-VIRESCENS; QUALITY ASSESSMENT; HYMENOPTERA; SIZE; FITNESS; SCELIONIDAE SO - Journal of Entomological Science 2002 ;37(1):10-26 6072 UI - 11239 AU - Martinez-Orozco JC AU - Gaggero-Sager LM AU - Mora-Ramos ME AU - Perez-Quintana I AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaGaggero-Sager, LM, Univ Autonoma Estado Morelos, Fac Ciencias, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Differential capacitance for the AlN/GaN heterostructure field effect transistors AB - The differential capacitance in single heterostructure AlxGai-xN/GaN field effect transistors is calculated. It is shown that the existence of a non-homogeneously distributed density of fixed charges, like the polarization-induced one (sigma) at the interface, explains the deviation of the measured C-2-V characterization from the linear behavior in AlN/GaN metal-insulator semiconductor structures. The results suggest the possibility of using the C-V experiment to measure the value of a in nitride single heterostructures as well as to determine the degree of strain relaxation in such systems MH - Cuba MH - Mexico|Morelos PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000175278300011 L2 - ALGAN/GAN HETEROSTRUCTURES; VOLTAGE CHARACTERISTICS; QUANTUM-WELL SO - Physica Status Solidi B-Basic Research 2002 ;230(2):335-338 6073 UI - 10778 AU - Martinez-Palacios CA AU - Tovar EB AU - Taylor JF AU - Duran GR AU - Ross LG AD - Univ Michoacana San Nicolas Hidalgo, Inst Invest Sobre Recursos Nat & Ambientales, Morelia, Michoacan, MexicoUniv Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandMartinez-Palacios, CA, Univ Michoacana San Nicolas Hidalgo, Inst Invest Sobre Recursos Nat & Ambientales, Morelia, Michoacan, Mexico TI - Effect of temperature on growth and survival of Chirostoma estor estor, Jordan 1879, monitored using a simple video technique for remote measurement of length and mass of larval and juvenile fishes AB - The growth and survival of white fish (Chirostoma estor estor) larvae were measured at different temperatures ranging from 16.1 to 34degreesC. A single camera video system was used for accurate measurement of length of larval and juvenile fish, which enabled growth experiments on delicate animals with minimal handling. Use of a length/weight relationship then enabled estimation of mass. When applied to C. estor estor, the error of the system was generally less than 0.5% for length, but increased to over 1% when the distance of the larva to the grids increased. The total practical error in estimation of biomass using the video method was -2.05% for dry weight, with a range from -7.1% to +4.1%. Over a number of experiments, the recorded mortality due to the measuring process was less than 1%, representing a dramatic advance on all previous attempts to work with Chirostoma. This simple method could have wider utility for fragile larvae such as. marine fish. Larvae were fed ad libitum with Brachionus rubens rotifers and Artemia franciscana nauplii for 1 month. The results showed that the optimum temperature for specific growth rates (SGR) was 28degreesC, although survival was only 18% at this temperature. The best survival (53%) was at temperatures of 22 and 25degreesC. The best overall temperature for growth and survival was 25 degreesC. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000176764100029 L2 - specific growth rate;Chirostoma estor estor;video technique;HALIBUT; LIGHT; SIZE SO - Aquaculture 2002 ;209(1-4):369-377 6074 UI - 10694 AU - Martinez-Perez ME AU - Hughes AD AU - Stanton AV AU - Thom SA AU - Chapman N AU - Bharath AA AU - Parker KH AD - Univ Nacl Autonoma Mexico, IIMAS, Dept Comp Sci, Mexico City 04510, DF, MexicoUniv London Imperial Coll Sci Technol & Med, St Marys Hosp, Natl Heart & Lung Inst, London W2 1NY, EnglandUniv London Imperial Coll Sci Technol & Med, Dept Bioengn, London SW7 2BY, EnglandMartinez-Perez, ME, Univ Nacl Autonoma Mexico, IIMAS, Dept Comp Sci, Circuito Escolar S-N Ciudad Univ, Mexico City 04510, DF, Mexico TI - Retinal vascular tree morphology: A semi-automatic quantification AB - A semi-automatic method to measure and quantify geometrical and topological properties of continuous vascular trees in clinical fundus images is described. Measurements are made from binary images obtained with a previously described segmentation process. The skeletons of the segmented trees are produced by thinning,ff branch and crossing points are identified and segments of the trees are labeled and stored as a chain code. The operator selects a tree to be measured and decides if it is an arterial or venous tree. An automatic process then measures the lengths, areas and angles of the individual segments of the tree. Geometrical data and the connectivity information between branches from continuous retinal vessel trees are tabulated. A number of geometrical properties and topological indexes are derived. Vessel diameters and branching angles are validated against manual measurements and several derived geometrical and topological properties are extracted from red-free fundus images of ten normotensive and ten age- and sex-matched hypertensive subjects and compared with previously reported results MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 20 U4 - Engineering, Biomedical U5 - J;Article AV - English IS - 0018-9294 UR - ISI:000176909100018 L2 - image analysis;ophthalmology;retinal imaging;vascular geometry;vascular topology;vascular tree morphology;BLOOD-VESSELS; IMAGES; SEGMENTATION; AGE SO - Ieee Transactions on Biomedical Engineering 2002 ;49(8):912-917 6075 UI - 8995 AU - Martinez-Reyna JM AU - Vogel KP AD - Univ Autonoma Agraria Antonio Narro, Saltillo, Coahuila, MexicoVogel, KP, Univ Nebraska, USDA ARS, 344 Keim Hall,POB 830937, Lincoln, NE 68583 USA TI - Incompatibility systems in switchgrass AB - Switchgrass (Panicum virgatum L.), a cross-pollinated perennial, produces very little or no seed when self-pollinated, indicating the presence of self-incompatibility mechanisms. Knowledge of self-incompatibility mechanisms is required to use germplasm effectively in a breeding program. The objective of this study was to characterize features of the incompatibility systems in switchgrass. Seed set and seed characteristics of reciprocal matings of tetraploid, octaploid, and tetraploid X octaploid plants were used as measures of incompatibility. Both bagged mutual pollination and manual emasculation and pollination methods were used to make crosses. The percentages of self-compatibility in the tetraploid and octaploid parent plants were 0.35 and 1.39%, respectively. Prefertilization incompatibility in switchgrass is apparently under gametophytic control, since there were significant differences in percentage of compatible pollen as measured by percentage of total seed set between reciprocal matings within ploidy levels. Results indicated that the prefertilization incompatibility system in switchgrass is similar to the S-Z incompatibility system found in other members of the Poaceae. A postfertilization incompatibility system also exists that inhibits intermatings among octaploid and tetraploid plants. In these interploidy crosses, two very distinctive types of abnormal seed were found. When the female parent was the tetraploid plant, the resulting seed was small and shriveled, while when the female parent was the octaploid, small seed with floury endosperm was obtained. These results are similar to those obtained for endosperm incompatibility due to the endosperm balance number system found in other species MH - Mexico|Coahuila MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430200004 L2 - ENDOSPERM BALANCE NUMBER; DNA CONTENT; CROSSES SO - Crop Science 2002 ;42(6):1800-1805 6076 UI - 11152 AU - Martinez-Villafane A AU - Stott FH AU - Chacon-Nava JG AU - Wood GC AD - Ctr Invest Mat Avanzados SC, Div Deterioro Mat & Integridad Estruct, Chihuahua, MexicoUniv Manchester, Inst Sci & Technol, Ctr Corros & Protect, Manchester M60 1QD, Lancs, EnglandMartinez-Villafane, A, Ctr Invest Mat Avanzados SC, Div Deterioro Mat & Integridad Estruct, Av Miguel de Cervantes 120 Complejo Ind Chihuahua, Chihuahua, Mexico TI - Enhanced oxygen diffusion along internal oxide-metal matrix interfaces in Ni-Al alloys during internal oxidation AB - A study of the internal oxidation of dilute Ni-Al alloys in an NiO/Ni Rhines pack was performed at 800, 1000, and 1100degreesC Considerable deviations from the classical internal oxidation model have been observed. The rate of internal oxidation depends not only on the concentration of the alloying element but also on its nature, which contributes to determining the size, shape, orientation and distribution of the internal oxide precipitates. For instance, the precipitates in the Ni-Al alloys are continuous rods, arranged in a cone-shaped configuration that extends from the surface to the internal oxide front. The observed depths of internal oxidation for the various concentrations of aluminum are discussed and related to the morphologies of the internal oxide precipitates. The apparent N-o((s)) D-o values determined from internal oxide penetrations increase with increasing solute content in the alloy. It is postulated that diffusivity of oxygen is enhanced along the internal oxide-metal matrix interface compared with that in the metal matrix MH - United Kingdom MH - Mexico|Chihuahua PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 12 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0030-770X UR - ISI:000175465800005 L2 - internal oxidation;Ni-Al alloys;enhanced oxygen diffusion;NICKEL-BASE ALLOYS; HIGH-TEMPERATURE SO - Oxidation of Metals 2002 ;57(3-4):267-279 6077 UI - 8216 AU - Martinez A AU - Gutierrez M AU - Collazo J AU - Montesinos JJ AU - Mayani H AU - McCurdy D AU - Ostrosky P AU - Garrido E AU - Miranda EI AD - CINVESTAV, IPN, Mexico City 14000, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoIMSS, CMNSXXI, Unidad Inv Med Enfermedades Oncol, Mexico City, DF, MexicoChildrens Hosp Orange Cty, Orange, CA 92668, USAUNAM, IIB, Mexico City, DF, Mexico TI - MAGE-A and -B genes are expressed in acute leukemia MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000179184800850 SO - Blood 2002 ;100(11):201B-201B 6078 UI - 9912 AU - Martinez A AU - Sansores LE AU - Salcedo R AU - Tenorio FJ AU - Ortiz JV AD - UNAM, Inst Invest Mat, Coyoacan 04510, DF, MexicoKansas State Univ, Dept Chem, Manhattan, KS 66506, USAMartinez, A, UNAM, Inst Invest Mat, Circuito Exterior S-N,CU,POB 70-360, Coyoacan 04510, DF, Mexico TI - Al3On and Al3On- (n=1-3) clusters: Structures, photoelectron spectra, harmonic vibrational frequencies, and atomic charges AB - Structure and bonding in Al3On and Al3On- aluminum oxide clusters where n = 1-3 are studied with electronic structure calculations and are compared with some experimental results. Geometry optimizations with the B3LYP/6-311+G(2d,p) density functional method produced minima which were verified with frequency calculations. Several initial geometries and distinct spin multiplicities were considered for each case. The most stable anionic structures from density functional calculations were confirmed with additional. geometry optimizations at the QCISD level. Equilibrium geometries, harmonic frequencies, and atomic charges. are presented. These results, in combination with previous assignments of anion photoelectron spectra, provide a consistent explanation for changes in isomerization energies between anionic and neutral species MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000179011300020 L2 - MOLECULAR-ORBITAL METHODS; GAUSSIAN-BASIS SETS; ELECTRONIC-STRUCTURE; ALO; ENERGIES; CHEMILUMINESCENCE; SPECTROSCOPY SO - Journal of Physical Chemistry A 2002 ;106(44):10630-10635 6079 UI - 9671 AU - Martinez DF AU - Reichl LE AU - Luna-Acosta GA AD - Univ Texas, Dept Phys, Austin, TX 78712, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoMartinez, DF, Univ Texas, Dept Phys, 1 Univ Stn C1609, Austin, TX 78712 USA TI - Quasienergy band structure of the harmonically driven delta-function chain AB - We study the quasienergy band structure of a potential consisting of a periodic array of harmonically oscillating delta functions. The perturbative and non-perturbative regimes are investigated using Floquet-Bloch states and the Floquet translation matrix whose eigenvalues and eigenvectors are given in terms of continued fractions. We study the structure of these eigenstates and relate it to the structure of the quasibound state of a single delta-function potential. We also study the dynamics of the bands as a function of the strength of the oscillating potential and find that the collapse of one of the quasienergy bands is related to the quenching of the transmission through a single delta-function potential MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000179611700043 L2 - DYNAMIC LOCALIZATION; ELECTRIC-FIELD; SEMICONDUCTOR SUPERLATTICES; BLOCH OSCILLATIONS; PARTICLE; SYSTEM; SPACE; ATOMS; CHAOS SO - Physical Review B 2002 ;66(17): 6080 UI - 11663 AU - Martinez E AU - Fundora A AU - Amorin H AU - Portelles J AU - Siqueiros JM AD - CICESE, Ensada 22860, BC, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoMartinez, E, CICESE, Ensada 22860, BC, Mexico TI - Study by high resolution electron microscopy and electron diffraction of the La0.03Sr0.255Ba0.7Nb2-yTiyO6-y/2 ferroelectric ceramic AB - The stoichiometric La0.03Sr0.255Ba0.7Nb2-yTiyO6-y/2 (LSBNT) ceramic system was obtained for three different concentrations of titanium ions (y=1%, 3%, and 5%) where the Nb5+ was substituted by Ti4+ according to the expression La0.03Sr0.255Ba0.7Nb2-yTiyO6-y/2. The incommensurate modulation in the LSBNT structure has been studied by high-resolution transmission electron microscopy (HRTEM) and electron diffraction. The location of the incommensurate superlattice spots in the tetragonal phase through the [110] zone in the electron diffraction patterns was measured to determine the incomensuration parameter delta. Structural modulation was also evident by HRTEM for the [001] zone, where a sinusoidal variation along [110] and [1 (1) over bar0] was identified in coincidence with the electron diffraction patterns. Random occupation of the crystallographic sites that promotes structural variations may be the cause for structural incommensuration. It was possible to identify directly the tetragonal tungsten bronze structure and the presence of point defects that influence the dielectric properties. (C) 2002 American Institute of Physics MH - Cuba MH - Mexico|Baja California PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000174182400091 L2 - STRONTIUM BARIUM NIOBATE; INCOMMENSURATE PHASES; SODIUM NIOBATE; TRANSITION SO - Journal of Applied Physics 2002 ;91(5):3154-3159 6081 UI - 9895 AU - Martinez MG AU - Klimova-Berestneva T AU - mian-Zea K AU - Meleshonkova NN AU - Klimova EI AD - Natl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Moscow, RussiaMartinez, MG, Natl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, Mexico TI - Ene synthesis of bicyclic arylmethylenedihydropyrazoles using 4-phenyl-4,5-dihydro-3H-1,2,4-triazole-3,5-dione AB - 8-Acetyl-7-aryl-2-arylmethylene-8,9-diaza- and 4,8,9-triazabicyclo[4.3.0]non-9-enes react with 4-phenyl-4,5-dihydro-3H-1,2,4-triazole-3,5-dione, following the ene addition pattern. Under similar conditons 7-aryl-2-arylmethylene-8-methyl-8,9-diazabicyclo[4.3.0]non-9-enes give rise to both mono- and polyaddition products. The product structures were studied by H-1 and C-13 NMR, IR, and UV spectroscopy and single crystal X-ray diffraction MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1070-3632 UR - ISI:000179024700027 SO - Russian Journal of General Chemistry 2002 ;72(7):1132-1140 6082 UI - 11224 AU - Martinez ML AU - Vazquez G AU - White DA AU - Thivet G AU - Brengues M AD - Inst Ecol, Dept Ecol Vegetal, AC, Xalapa 91070, Veracruz, MexicoLoyola Univ, Dept Biol Sci, New Orleans, LA 70112, USAMartinez, ML, Inst Ecol, Dept Ecol Vegetal, AC, Km 2-5 Antigue Carretera Coatepec, Xalapa 91070, Veracruz, Mexico TI - Effects of burial by sand and inundation by fresh- and seawater on seed germination of five tropical beach species AB - Plants growing on the beach are exposed to substrate mobility, freshwater inundation, and immersion in seawater, which greatly affect germination and species spatial distribution. In greenhouse experiments, we tested whether the most abundant species on the beach at La Mancha (on the Gulf of Mexico) were tolerant to burial and flooding. We buried seeds of Canavalia maritima, Ipomoea pes-caprae, Chamaecrista chamaecristoides, Palafoxia lindenii, and Ambrosia artemisiifolia at different depths. We used fresh- and seawater flooding with two frequencies: permanent and intermittent. The hard-coated seeds of Canavalia, Ipomoea, and Chamaecrista were left scarified and not scarified to test if dormancy was broken by the flooding regimes. Germination decreased as burial depth increased. We calculated a tolerance index for the burial responses, which indicated that Chamaecrista was the most tolerant species, followed by Canavalia and Palafoxia. Flooding inhibited germination, but more so permanent seawater flooding; it was especially lethal for species closest to the ocean such as Canavalia and Ipomoea. After transfer to freshwater, seeds of Chamaecrista, Palafoxia, and Ambrosia germinated. There was no evidence that hard-coat dormancy was broken by flooding. Tolerance to burial seems to be related to the spatial distribution of species but not to germination responses to flooding MH - Mexico|Veracruz MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0008-4026 UR - ISI:000175373500011 L2 - germination;sand burial;freshwater;seawater;flooding;Gulf of Mexico;CALAMOVILFA-LONGIFOLIA; COASTAL DUNES; EMERGENCE; SALINITY; GROWTH; TEMPERATURE; SURVIVAL; ESTABLISHMENT; HALOPHYTES; SEEDLINGS SO - Canadian Journal of Botany-Revue Canadienne de Botanique 2002 ;80(4):416-424 6083 UI - 9477 AU - Martini S AU - Wagner FA AU - Anthony JC AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mental Hlth, Elect Collaboratory Invest Drugs,ELCID, Baltimore, MD 21205, USAWayne State Univ, Dept Psychiat & Behav Sci, Detroit, MI 48202, USAInst Nacl Psiquiatria, Dept Invest Serv Salud, Xochimilco, MexicoAnthony, JC, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mental Hlth, Elect Collaboratory Invest Drugs,ELCID, 624 N Broadway,ELCID & 893, Baltimore, MD 21205 USA TI - The association of tobacco smoking and depression in adolescence: Evidence from the United States AB - Introduction. We examine a suspected causal association between tobacco smoking and depression. Using data from the National Household Survey on Drug Abuse (NHSDA), we explore variation in depression severity among current and former smokers compared to nonsmokers. We focus on the association between time since last smoke in former smokers and depression severity, to examine whether the level of tobacco-depression relationship might vary in a time-dependent fashion. Methods. Our cross-sectional data come from three public use files of the U.S. National Household Survey on Drug Abuse (NHSDA), collected with different respondents each year from 1994 to 1996, for participants 12-17 years old (N = 13,827). Ordinal logistic regression is used to assess the association between severity of depression and cigarette smoking among former. and current smokers. Results. Current smokers had the highest odds for depression, followed by former smokers, then nonsmokers. Females had higher odds of depression compared to males. The odds of depression varied in subgroups of former smokers. Odds of depression were lower with more elapsed time since last smoke. Discussion. We add new evidence on depression in association with tobacco smoking. Teens who quit smoking may reduce their odds of depressed mood, but more research is needed before a definite causal path can be established MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 15 U4 - Substance Abuse;Psychiatry;Psychology U5 - J;Article AV - English IS - 1082-6084 UR - ISI:000180004900002 L2 - depression;adolescence;tobacco;smoking cessation;CIGARETTE-SMOKING; US ADOLESCENTS; SYMPTOMS SO - Substance Use & Misuse 2002 ;37(14):1853-1867 6084 UI - 11670 AU - Marty S AU - Wehrle R AU - varez-Leefmans FJ AU - Gasnier B AU - Sotelo C AD - Hop La Pitie Salpetriere, INSERM, U106, F-75013 Paris, FranceIPN, Ctr Invest & Estudios Avanzados, Dept Farmacobiol, Mexico City 0700, DF, MexicoInst Nacl Psiquiatria, Div Neurociencias, Mexico City 14370, DF, MexicoInst Biol Physicochim, CNRS, UPR 1929, F-75005 Paris, FranceMarty, S, Hop La Pitie Salpetriere, INSERM, U106, 47 Blvd Lhop, F-75013 Paris, France TI - Postnatal maturation of Na+, K+, 2Cl(-) cotransporter expression and inhibitory synaptogenesis in the rat hippocampus: an immunocytochemical analysis AB - GABA, a major inhibitory neurotransmitter, depolarizes hippocampal pyramidal neurons during the first postnatal week. These depolarizations result from an efflux of Cl- through GABA(A)-gated anion channels. The outward Cl- gradient that provides the driving force for Cl- efflux might be generated and maintained by the Na+, K+, 2Cl(-) cotransporter (NKCC) that keeps intracellular Cl- concentration above electrochemical equilibrium. The developmental pattern of expression of the cotransporter in the hippocampus is not known. We studied the postnatal distribution pattern of NKCC in the hippocampus using a monoclonal antibody (T4) against a conserved epitope in the C-terminus of the cotransporter molecule, We also examined the temporal relationships between the developmental pattern of NKCC expression and the formation of perisomatic GABAergic synapses. This study was aimed at determining, with antivesicular inhibitory amino acid transporter (VIAAT) antibodies, whether perisomatic GABAergic synapses are formed preferentially at the time when GABA is depolarizing. During the first postnatal week, NKCC immunolabelling was restricted to cell bodies in the pyramidal cell layer and in the strata oriens and radiatum. In contrast, at postnatal day 21 (P21) and in adult animals little or no labelling occurred in cell bodies; instead, a prominent dendritic labelling appeared in both pyramidal and nonpyramidal neurons. The ultrastructural immunogold study in P21 rat hippocampi corroborated the light-microscopy results. In addition, this study revealed that a portion of the silver-intensified colloidal gold particles were located on neuronal plasmalemma, as expected for a functional cotransporter. The formation of inhibitory synapses on perikarya of the pyramidal cell layer was a late process. The density of VIAAT-immunoreactive puncta in the stratum pyramidale at P21 reached four times the P7 value in CA3, and six times the P7 value in CA1. Electron microscopy revealed that the number of synapses per neuronal perikaryal profile in the stratum pyramidale of the CA3 area at P21 was three times higher than at P7, even if a concomitant 20% increase in the area of these neuronal perikaryal profiles occurred. It is concluded that, in hippocampal pyramidal cells, there is a developmental shift in the NKCC localization from a predominantly somatic to a predominantly dendritic location. The presence of NKCC during the first postnatal week is consistent with the hypothesis that this transporter might be involved in the depolarizing effects of GABA. The depolarizing effects of GABA may not be required for the establishment of the majority of GABAergic synapses in the stratum pyramidale, because their number increases after the first postnatal week, when GABA action becomes hyperpolarizing MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 33 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000174154800002 L2 - GABAergic synapses;hippocampus;NKCC;pyramidal cells;VIAAT;VESICULAR GABA TRANSPORTER; NA-K-2CL COTRANSPORTER; GABAERGIC NEURONS; CL COTRANSPORTER; NEUROTROPHIC FACTOR; INTRACELLULAR CL; IN-VITRO; BRAIN; LOCALIZATION; RECEPTORS SO - European Journal of Neuroscience 2002 ;15(2):233-245 6085 UI - 9271 AU - Marzantowicz W AU - Prieto C AD - UAM, Fac Math & Comp Sci, Poznan, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Generalized Lefschetz numbers for equivariant maps MH - Mexico|Distrito Federal MH - Poland PB - TOYONAKA: OSAKA JOURNAL OF MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0030-6126 UR - ISI:000180795800004 SO - Osaka Journal of Mathematics 2002 ;39(4):821-841 6086 UI - 9764 AU - Masciadri E AU - Dal Pino EMD AU - Raga AC AU - Noriega-Crespo A AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoMax Planck Inst Astron, D-69117 Heidelberg, GermanyUniv Sao Paulo, Inst Astron & Geofis, BR-05508090 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCALTECH, SIRTF Sci Ctr, Pasadena, CA 91125, USAMasciadri, E, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - The precession of the giant HH 34 outflow: A possible jet deceleration mechanism AB - The giant jets represent a fundamental trace of the historical evolution of the outflow activity over timescales of similar to10(4) yr, i.e., a timescale comparable to the accretion time of the outflow sources in their main protostellar phase. The study of such huge jets provides the possibility of retrieving important elements related to the life of the outflow sources. In this paper, we study the role of precession (combined with jet velocity variability and the resulting enhanced interaction with the surrounding environment) as a deceleration mechanism for giant jets, using a numerical approach. This thesis was proposed for the first time by Devine et al., but it could not be numerically explored until now, because it is intrinsically difficult to reproduce, at the same time, the large range of scales from similar to100 AU up to a few parsecs. In the present paper, we obtain predictions of Halpha intensity maps and position-velocity diagrams from three-dimensional simulations of the giant HH 34 jet (including an appropriate ejection velocity time variability and a precession of the outflow axis), and we compare them with previously published observations of this object. Our simulations represent a step forward from previous numerical studies of HH objects, in that the use of a seven-level, binary adaptive grid has allowed us to compute models that appropriately cover all relevant scales of a giant jet, from the similar to100 AU jet radius close to the source to the similar to1 pc length of the outflow. A good qualitative and quantitative agreement is found between the model predictions and the observations, indicating that a precession of the jet axis can indeed be the probable cause of the deceleration of the giant jets. Moreover, we show that a critical parameter for obtaining a better or worse agreement with the observations is the ratio rho(j)/rho(a) between the jet and the environmental densities. The implications of this result in the context of the current star formation models are discussed MH - Brazil MH - Germany MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179458300030 L2 - hydrodynamics;ISM : Herbig-Haro objects;ISM : jets and outflows;methods : numerical;stars : pre-main-sequence;HERBIG-HARO FLOWS; YOUNG STARS; HH-34; SUPERJET; OBJECTS SO - Astrophysical Journal 2002 ;580(2):950-958 6087 UI - 10914 AU - Masciadri E AU - Velazquez PF AU - Raga AC AU - Canto J AU - Noriega-Crespo A AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCALTECH, SIRTF Sci Ctr, Pasadena, CA 91125, USAMasciadri, E, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Analytic and numerical models for the knots along the HH 111 jet AB - We consider a model for HH 111 as a jet ejected with a sawtooth, time-dependent ejection velocity. Such a variability is suggested by the position-velocity (PV) diagrams obtained from Hubble Space Telescope observations. We calculate both analytic and numerical models describing the flow resulting from such an ejection velocity time variability. Analytically, we calculate the flow for the limiting cases of massless working surfaces (i.e., those that efficiently eject mass sideways into the cocoon of the jet) and mass-conserving working surfaces, and we find that the numerically computed flow lies between these two limits. From the numerical simulations, we compute PV diagrams that can be directly compared with the corresponding observations. We find a surprisingly good agreement, which can be seen as a partial confirmation of the interpretation of the knots along HH 111 as the result of a time dependence in the ejection. Also, we show that a sawtooth functional form for the ejection velocity variability appears to be particularly appropriate for modeling the detailed radial velocity structure of the knots along HH 111 MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176340400025 L2 - ISM : Herbig-Haro objects;ISM : individual (HH 111);ISM : jets and outflows;ISM : kinematics and dynamics;shock waves;MULTIPLE OUTFLOW EPISODES; HUBBLE-SPACE-TELESCOPE; YOUNG STELLAR OBJECTS; HERBIG-HARO JETS; HH-111 JET; PROPER MOTIONS; HH111 JET; SIMULATIONS; HH-34; FLOWS SO - Astrophysical Journal 2002 ;573(1):260-269 6088 UI - 9232 AU - Massie S AU - Gettelman A AU - Randel W AU - Baumgardner D AD - Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoMassie, S, Natl Ctr Atmospher Res, Div Atmospher Chem, 1850 Table Mesa Dr, Boulder, CO 80307 USA TI - Distribution of tropical cirrus in relation to convection AB - Daily values of Halogen Occultation Experiment (HALOE) aerosol extinction and Climate Diagnostics Center (CDC) outgoing longwave radiation (OLR) data are used to quantify the statistical and geographical relationships of tenuous cirrus to OLR for pressure levels near the equatorial tropopause. Daily locations of deep convection are identified by analysis of the CDC OLR data. Analysis of the HALOE and CDC data demonstrates that cirrus extinction is larger over deep convection than over clearer regions by a factor of 3. Deep convection, however, occupies only 7% of the equatorial region. Ninety percent of the cirrus clouds near the tropopause are located outside of regions of deep convection. Estimates of the equivalent H2O amount in the cirrus are calculated by applying transformations from extinction to volume density. Averaged over the HALOE 2 km vertical field of view, the amount of equivalent H2O in cirrus is 0.1-0.2 ppmv, which is 2 to 5% of the local gas phase H2O. Five-day back trajectories near the tropopause are calculated for 1995-2000. Half of the HALOE cirrus observations over the maritime continent are consistent with formation by convective blow-off, while the other half are consistent with in situ formation processes MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 20 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180860300043 L2 - cirrus;tropopause;convection;equatorial;satellite;aerosol;HALOGEN OCCULTATION EXPERIMENT; LOWER STRATOSPHERE; UPPER TROPOSPHERE; THIN CIRRUS; EL-NINO; TROPOPAUSE; CLOUDS; DEHYDRATION; AEROSOL; CEPEX SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D21): 6089 UI - 9275 AU - Massone CA AU - Titov A AU - Malinovsky L AU - Cogno J AU - Viliesid M AU - Pichardo R AU - Madej A AU - Chartier A AU - Chartier JM AD - Inst Nacl Metrol, BR-2225020 Duque De Caxias, RJ, BrazilInst Nacl Tecnol Ind, RA-1001 Buenos Aires, DF, ArgentinaCtr Nacl Metrol, Queretaro 76900, MexicoNatl Res Council Canada, NRC INMS, Ottawa, ON K1A 0R6, CanadaBur Int Poids & Mesures, F-92312 Sevres, FranceMassone, CA, Inst Nacl Metrol, Av Nossa Senhora das Gracas 50, BR-2225020 Duque De Caxias, RJ, Brazil TI - International comparisons of He-Ne lasers stabilized with I-127(2) at lambda approximate to 633 nm (July 2000) - Part X: Comparison of INMETRO (Brazil), INTI (Argentina), NRC-INMS (Canada), CENAM (Mexico), and BIPM lasers at lambda approximate to 633 nm AB - This paper reports the tenth set of results of a series of grouped laser comparisons from national laboratories undertaken by the Bureau International des Poids et Mesures (BIPM) at the request of the Consultative Committee for Length (CCL), formerly the Consultative Committee for the Definition of the Metre (CCDM), for the periods July 1993 to September 1995 and March 1997 to March 2001. As with the previous nine comparisons, this one is expected to be listed as a key comparison in the context of the ongoing BIPM.L-K10 series. The results of this comparison, involving seven lasers from four countries in the Americas and the BIPM, meet the goals set by the CCDM in 1992 and in 1997 and adopted by the International Committee for Weights and Measures (CIPM) the same year. The standard uncertainty (I a) of the frequency of the He-Ne laser stabilized on the saturated absorption of I-127(2) at lambda approximate to 633 nm is reduced to a level of 12 kHz (2.5 parts in 10(11)) when the lasers compared meet the recommended values of the parameters. The lasers were first compared with the BIPMP3 laser, with all the lasers set to the parameter values normally used in each laboratory; the results then ranged from -31.5 kHz to +10.0 kHz. After checking and correcting when possible the values of all the parameters, the range stayed about the same, -31.5 kHz to +9.1 kHz. Under the latter conditions, the average frequency difference of the group of seven lasers, with respect to the BIPM4 laser, was -4.4 kHz with a standard uncertainty (1 sigma) of 13.2 kHz. If the INMETRO2 laser, considered as a secondary laser, is removed from the group, then the average is -0.5 kHz with a standard deviation (1 sigma) of 9.2 kHz. The best relative frequency stabilities, with Allan standard deviations of about 9.3 x 10(-13), 3.5 x 10(-13) and 1.4 x 10(-11), were observed with sampling times of 10 s, 100 s and 1000 s, respectively. Results obtained with NRC and BIPM lasers over a period of five months in two beat-frequency laser comparisons and in an absolute frequency measurement lie within 1 kHz (2 parts in 10(12)) MH - Argentina MH - Brazil MH - Canada MH - France MH - Mexico|Queretaro PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000180706600008 L2 - LAMBDA-APPROXIMATE-TO-633 NM; SEPTEMBER 1995; EUROPEAN LASERS; IODINE CELLS; WAVELENGTH; STANDARDS; JAPAN SO - Metrologia 2002 ;39(6):579-585 6090 UI - 10533 AU - Mata R AU - Rivero-Cruz I AU - Rivero-Cruz B AU - Bye R AU - Timmermann BN AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Mexico City 04510, DF, MexicoUniv Arizona, Coll Pharm, Dept Pharmacol & Toxicol, Tucson, AZ 85721, USAMata, R, Univ Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, Mexico TI - Sesquiterpene lactones and phenylpropanoids from Cosmos pringlei AB - Activity-directed fractionation of a phytotoxic extract from Cosmos pringlei led to the isolation of three new compounds, namely, 1'-isovaleroyloxy-4-O-isobutyryleugenol (1), zaluzanin C isobutyrate (2), and zaluzanin C isovalerate (3). In addition, mokko lactone, 1'-isobutiroyloxy-4-O-isobutyryleugenol (4), dehydrocostus lactone (5), costunolide (6), 15-isovaleroyloxycostunolide (7), 15-isobutiroyloxycostunolide (8), 1',2'-epoxy-3',4'-di-isobutyryl-Z-coniferyl alcohol, and 3beta-hydroxy-5alpha-pregn-16-en-20-one were obtained. The structures of the new compounds were established by spectral methods. Compounds 5-7 caused inhibition of radicle growth of seedlings of Amaranthus hypochondriacus MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000177226800017 L2 - DERIVATIVES SO - Journal of Natural Products 2002 ;65(7):1030-1032 6091 UI - 9600 AU - Matamoras-Veloza Z AU - Yanagisawa K AU - Rendon-Angeles JC AU - Yamasaki N AD - Kochi Univ, Fac Sci, Res Lab Hydrothermal Chem, Kochi 7808520, JapanFac Met Mecan, Inst Tecnol Saltillo, Saltillo 25000, Coahuila, MexicoIPN, Ctr Invest & Estudios Avanzados, Saltillo 29800, Coahuila, MexicoTohoku Univ, Sch Engn, Dept Geosci & Technol, Aoba Ku, Sendai, Miyagi 9808577, JapanMatamoras-Veloza, Z, Kochi Univ, Fac Sci, Res Lab Hydrothermal Chem, 2-5-1 Akebono Cho, Kochi 7808520, Japan TI - Preparation of porous materials from hydrothermally hot pressed glass compacts MH - Japan MH - Mexico|Coahuila PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000179659900013 L2 - CERAMICS; FOAMS SO - Journal of Materials Science Letters 2002 ;21(23):1855-1858 6092 UI - 9625 AU - Mateo-Cid LE AU - Mendoza-Gonzalez AC AU - Searles RB AD - Duke Univ, Dept Biol, Durham, NC 27708, USAEscuela Nacl Ciencias Biol, Lab Ficol, Mexico City 11340, DF, MexicoMateo-Cid, LE, Duke Univ, Dept Biol, Durham, NC 27708, USA TI - New Mexican records of marine algae including Crouania mayae sp nov (Ceramiaceae, Rhodophyta) AB - We report new records from the Mexican Caribbean of three species of Rhodophyta (including Crouania mayae sp. nov.), two species of Heterokontophyta, and two species of Chlorophyta, all are rare species in the Caribbean. The only previous Caribbean record of Rhodochaete pulchella is from Jamaica, and Naccaria antillana was known only from Jamaica and Nevis Island. Herponema tortugense has been reported from Florida, Puerto Rico and Brazil. The record of Verosphacella ebrachia is the first outside the type locality in Florida and that of Rhipidosiphon floridensis is the first outside of Florida and Puerto Rico. Rhipiliopsis stri is reported for the first time outside of Panama, Colombia and the Netherlands Antilles. Information is given on the morphology, reproductive stage, localities and habitats of these taxa MH - Mexico|Distrito Federal MH - USA PB - MAYAGUEZ: UNIV PUERTO RICO, RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation U5 - J;Article AV - English IS - 0008-6452 UR - ISI:000179683900004 SO - Caribbean Journal of Science 2002 ;38(3-4):205-221 6093 UI - 10978 AU - Mathew X AU - Bansal A AU - Turner JA AU - Dhere R AU - Mathews NR AU - Sebastian PJ AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoNREL, Golden, CO 80401, USAMathew, X, UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Photoelectrochemical characterization of surface modified CdTe for hydrogen production AB - photo electrochemical measurements of a p-CdTe/water PEC system are reported. The CdTe was prepared by close spaced sublimation on flexible metallic substrates. The p-CdTe is more stable in solutions with pH in the range of 7 to 10. Under one sun illumination the hydrogen evolution potential of the p-CdTe/electrolyte system shift significantly. The V-fb has a linear dependence on the pH of the solution. The hydrogen evolution onset potential is lower in solutions having low pH. It was observed that the open circuit potentials tinder dark and light has a different dependence on the pH of the solution. The modification of the p-CdTe surface with Ru improves both the hydrogen evolution efficiency and the stability of the photocathode MH - Mexico|Morelos MH - USA PB - MONTREAL: ECOLE POLYTECHNIQUE MONTREAL RP - NOT IN FILE U3 - TC 2 U4 - Electrochemistry;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1480-2422 UR - ISI:000175980900011 L2 - CdTe;close spaced sublimation;PEC;water splitting;hydrogen production;flat band potential;ELECTROLYTE INTERFACE; SOLAR-CELL; SEMICONDUCTOR SO - Journal of New Materials for Electrochemical Systems 2002 ;5(2):149-154 6094 UI - 11193 AU - Matsuoka Y AU - Vigouroux Y AU - Goodman MM AU - Sanchez GJ AU - Buckler E AU - Doebley J AD - Univ Wisconsin, Genet Lab, Madison, WI 53706, USAN Carolina State Univ, Dept Genet, Raleigh, NC 27695, USAN Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695, USAN Carolina State Univ, USDA ARS, Raleigh, NC 27695, USAUniv Guadalajara, Ctr Univ Cienicas Biol & Agropecuarias, Zapopan 45110, Jalisco, MexicoDoebley, J, Univ Wisconsin, Genet Lab, Madison, WI 53706, USA TI - A single domestication for maize shown by multilocus microsatellite genotyping AB - There exists extraordinary morphological and genetic diversity among the maize landraces that have been developed by pre-Columbian cultivators. To explain this high level of diversity in maize, several authors have proposed that maize landraces were the products of multiple independent domestications from their wild relative (teosinte). We present phylogenetic analyses based on 264 individual plants, each genotyped at 99 microsatellites, that challenge the multiple-origins hypothesis. Instead, our results indicate that all maize arose from a single domestication in southern Mexico about 9,000 years ago. Our analyses also indicate that the oldest surviving maize types are those of the Mexican highlands with maize spreading from this region over the Americas along two major paths. Our phylogenetic work is consistent with a model based on the archaeological record suggesting that maize diversified in the highlands of Mexico before spreading to the lowlands. We also found only modest evidence for postdomestication gene flow from teosinte into maize MH - Mexico|Jalisco MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 144 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000175377800061 L2 - ZEA-MAYS L.; GENETIC DISTANCES; EVOLUTION; ORIGIN; DIVERSITY; TEOSINTE; MEXICO; LOCI SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(9):6080-6084 6095 UI - 10487 AU - Matta CF AU - Hernandez-Trujillo J AU - Bader RFW AD - McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaUniv Toronto, Dept Chem, Lash Miller Chem Labs, Toronto, ON M5S 1A1, CanadaUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoBader, RFW, McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada TI - Proton spin-spin coupling and electron delocalization AB - The spin-spin coupling of protons measured by the constant J(HH), in NMR experiments is dominated by a term proportional to the product of the electron spin densities at the two nuclei, the Fermi contact term. The probability of beta electrons being in excess over alpha electrons at the position of nucleus n', given that there is an alpha election at n, is proportional to the negative of the exchange density, the total Fermi correlation between n and n'. Thus the delocalization of the Fermi hole between n and n' is the, mechanism whereby the spin perturbation caused by the magnetic interaction of an electron with nucleus n is transmitted to n'. The density and exchange density within the basin of a hydrogen atom are described primarily in terms of s-type basis functions, and one may approximate the exchange density between two protons at n and n' by the exchange between the two associated atomic basins determined by the delocalization index delta(A,B) within the quantum theory of atoms in molecules. It is shown that this model yields good linear regression equations relating J(HH), to delta(H,H') for hydrogen atoms bonded to different carbons in alkanes, alkenes, their cyclic congeners, and polybenzenoid hydrocarbons MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000177353700016 L2 - PAIR; MOLECULES SO - Journal of Physical Chemistry A 2002 ;106(32):7369-7375 6096 UI - 10370 AU - Mattson M AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - He KL AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Yunshan L AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Mathew P AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Oliveira E AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko SV AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zukanovich-Funchal R AD - Carnegie Mellon Univ, Pittsburgh, PA 15213, USABall State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, Istanbul, TurkeyCtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Ramat Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyMattson, M, Carnegie Mellon Univ, Pittsburgh, PA 15213, USA TI - First observation of the doubly charmed baryon Xi(+)(cc) AB - We observe a signal for the doubly charmed baryon Xi(cc)(+) in the charged decay mode Xi(cc)(+)-->Lambda(c)(+)K(-)pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 68 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000177676400004 L2 - PARTICLES SO - Physical Review Letters 2002 ;89(11): 6097 UI - 11406 AU - Maunsell J AU - Romo R AD - Baylor Coll Med, Dept Neurosci, Houston, TX 77030, USABaylor Coll Med, Howard Hughes Med Inst, Houston, TX 77030, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoMaunsell, J, Baylor Coll Med, Dept Neurosci, 1 Baylor Plaza,S-603, Houston, TX 77030 USA TI - Cognitive neuroscience - Editorial overview MH - Mexico|Distrito Federal MH - USA PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences U5 - J;Editorial Material AV - English IS - 0959-4388 UR - ISI:000174961900001 SO - Current Opinion in Neurobiology 2002 ;12(2):131-133 6098 UI - 11776 AU - Maupome G AU - Borges-Yanez SA AU - ez-de-Bonilla FJ AU - Irigoyen-Camacho ME AD - Ctr Hlth Res, Hlth Serv Res Program, Portland, OR 97227, USANatl Autonomous Univ Mexico, Sch Dent, Mexico City, DF, MexicoMetropolitan Univ Xochimilco, Dept Hlth Sci, Mexico City, DF, MexicoMaupome, G, Ctr Hlth Res, Hlth Serv Res Program, 3800 N Interstate Ave, Portland, OR 97227 USA TI - Attitudes toward HIV-infected individuals and infection control practices among a group of dentists in Mexico City - a 1999 update of the 1992 survey AB - Background: The teaching of infection control (IC) was introduced at dental schools in Mexico during the 1990s, A 1992 survey indicated that some dentists had limited access to current IC standards, Deficient knowledge of bloodborne pathogens may influence dentists' attitudes about infected individuals and reduce compliance with IC recommendations. Objective: To update the 1992 appraisal of attitudes about persons infected with HIV or the hepatitis B virus (HBV) and IC knowledge and practices in a nonrepresentative sample of dentists in Mexico City. Method, One hundred eighty dentists were interviewed in 1999 (response rate, 84.1%) with the same methods used in 1992, Results: Seventy-nine percent of respondents perceived the risk of HIV infection as "considerable" to "very strong." The risk of HBV infection was considered higher than that of HIV, Only 32% of respondents had not been immunized against HBV. Reported use of personal protective equipment remained high. Dry heat was the preferred method for sterilization in 1992, but by 1999 it had been displaced by steam under pressure. Reported preference for more effective disinfectants was also evident overall, Conclusions: We found certain improvements in IC knowledge and practices between 1992 and 1999, and the results Suggest targets for educational and regulatory efforts that are needed to promote better adherence to current IC standards MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 4 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0196-6553 UR - ISI:000173994100002 L2 - KNOWLEDGE SO - American Journal of Infection Control 2002 ;30(1):8-14 6099 UI - 12122 AU - Mavingui P AU - Flores M AU - Guo XW AU - Davila G AU - Perret X AU - Broughton WJ AU - Palacios R AD - Univ Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca, Morelos, MexicoUniv Geneva, Lab Biol Mol Plant Superieures, CH-1211 Geneva 4, SwitzerlandMavingui, P, Univ Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Ap Postal 565-A, Cuernavaca, Morelos, Mexico TI - Dynamics of genome architecture in Rhizobium sp strain NGR234 AB - Bacterial genomes are usually partitioned in several replicons, which are dynamic structures prone to mutation and genomic rearrangements, thus contributing to genome evolution. Nevertheless, much remains to be learned about the origins and dynamics of the formation of bacterial alternative genomic states and their possible biological consequences. To address these issues, we have studied the dynamics of the genome architecture in Rhizobium sp. strain NGR234 and analyzed its biological significance. NGR234 genome consists of three replicons: the symbiotic plasmid pNGR234a (536,165 bp), the megaplasmid pNGR234b (>2,000 kb), and the chromosome (>3,700 kb). Here we report that genome analyses of cell siblings showed the occurrence of large-scale DNA rearrangements consisting of cointegrations and excisions between the three replicons. As a result, four new genomic architectures have emerged. Three consisted of the cointegrates between two replicons: chromosome-pNGR234a, chromosome-pNGR234b, and pNGR234a-pNGR234b. The other consisted of a cointegrate of the three replicons (chromosome-pNGR234a-pNGR234b). Cointegration and excision of pNGR234a with either the chromosome or pNGR234b were studied and found to proceed via a Campbell-type mechanism, mediated by insertion sequence elements. We provide evidence showing that changes in the genome architecture did not alter the growth and symbiotic proficiency of Rhizobium derivatives MH - Mexico|Morelos MH - Switzerland PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 20 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000172800500019 L2 - EVOLUTION; GENE; REARRANGEMENTS; SEPARATION; REPLICONS; SYMBIOSIS; BACTERIA; BROAD SO - Journal of Bacteriology 2002 ;184(1):171-176 6100 UI - 11129 AU - Maya-Nunez G AU - Janovick JA AU - Ulloa-Aguirre A AU - Soderlund D AU - Conn PM AU - Mendez JP AD - Hosp Pediat Mexico City, Ctr Med Nacl Siglo 21, Inst Mexicano Seguro Social, Res Unit Dev Biol, Mexico City 06725, DF, MexicoHosp Ginecobstet Luis Castelazo Ayala, Inst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City 01090, DF, MexicoOregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Beaverton, OR 97006, USAOregon Hlth Sci Univ, Dept Physiol & Pharmacol, Beaverton, OR 97006, USAMaya-Nunez, G, Coordinac Invest Med, Unidad Invest Med Biol Desarrollo, Avenida Cuauhtemoc 330,Apartado Postal 73-032, Mexico City 06725, DF, Mexico TI - Molecular basis of hypogonadotropic hypogonadism: Restoration of mutant ((EK)-K-90) GnRH receptor function by a deletion at a distant site AB - GnRH regulates the synthesis and release of pituitary gonadotropins. Mutations in the human GnRH receptor (hGnRHR) gene have been reported in families with hypogonadotropic hypogonadism. Our group recently described a novel homozygous (EK)-K-90 mutation of the hGnRHR in two siblings with the complete form of hypogonadotropic hypogonadism. In the present study, mutational analysis of the (EK)-K-90 substitution was performed to assess the functional role of this particular residue, which is located in the second transmembrane helix of the hGnRHR. Although E-90 is highly conserved in all other known mammalian GnRH receptors, this residue has not been previously implicated in GnRH binding and/or GnRHR activation. Transient expression of the mutant (EK)-K-90 receptor in COS-7 cells resulted in a virtual abolition of GnRH agonist binding and agonist-stimulated phosphoinositide turnover, initially suggesting that E90 may be essential for GnRH binding. Furthermore, incubation with 1 muM of different GnRH agonists (D-Trp(6)-GnRH, GnRH, leuprolide, Catfish-1 GnRH, Catfish-2 GnRH, D-Lys(6)-Pro(9)-EA-GnRH, DesGly(10)-GnRH, D-Trp(6)Pro(9)-EA-GnRH, Buserelin, and D-Lys(6)-GnRH) or antagonists (Antide and "Nal-Arg") did not result in elevated inositol phosphate production from cells expressing the (EK)-K-90 mutant. To examine the role of a site known to suppress hGnRHR function, mutants with deletion of K-191 (DeltaK(191)) from the hGnRHR and/or addition of catfish GnRHR intracellular carboxyl-terminal tail (cfCtail) to hGnRHR were prepared. Exposure to the GnRH analog Buserelin resulted in a significant increase in total inositol phosphate production in cells expressing the hGnRHR-cfCtail, hGnRHR(DeltaK(191)) and hGnRHR(DeltaK(191))-cfCtail. Activation of intracellular signaling in response to Buserelin was restored by deletion of K-191 from the (EK)-K-90 mutant receptor but minimally by addition of the catfish GnRHR carboxyl-terminal tail. There were no significant differences in total inositol phosphate production between the chimeric receptors bearing the DeltaK(191) or the (EK)-K-90/DeltaK(191) modifications. All but the ((EK)-K-90) and ((EK)-K-90)-efCtail altered receptors were membrane expressed as disclosed by Western blot analysis of epitope-tagged receptors. This study provides evidence that the (EK)-K-90 mutation impairs hGnRHR-effector coupling. The observation that sequence modifications that enhance surface expression of the receptor restore function, presents the possibility that loss of surface expression may underlie the severe phenotype exhibited by hypogonadotropic hypogonadism patients bearing this mutational defect MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 25 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000175648100038 L2 - LINKED KALLMANNS-SYNDROME; HORMONE-RECEPTOR; GENE; MUTATIONS; FAMILY; EXPRESSION; ACTIVATION; BINDING; XP22.3 SO - Journal of Clinical Endocrinology and Metabolism 2002 ;87(5):2144-2149 6101 UI - 10526 AU - maya-Tapia A AU - Larsen SY AU - Baxter J AU - Lassaut M AU - Berrondo M AD - UNAM, Ctr Ciencias FIs, Cuernavaca 62251, Morelos, MexicoTemple Univ, Dept Phys, Philadelphia, PA 19122, USAInst Phys Nucl, Grp Phys Theor, F-91406 Orsay, FranceBrigham Young Univ, Dept Phys, Provo, UT 84602, USAAmaya-Tapia, A, UNAM, Ctr Ciencias FIs, AP 48-3, Cuernavaca 62251, Morelos, Mexico TI - S matrix poles and the second virial coefficient AB - For cutoff potentials, a condition which is not a limitation for the calculation of physical systems, the S matrix is meromorphic. It may be expressed in terms of its poles, and then the quantum mechanical second virial coefficient of a neutral gas may be calculated. This paper takes another look at this approach, and discusses the feasibility, attraction and problems of the method. Among concerns are the rate of convergence of the 'pole' expansion and the physical significance of the 'higher' poles MH - France MH - Mexico|Morelos MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177250400003 SO - Molecular Physics 2002 ;100(16):2605-2615 6102 UI - 10128 AU - Maya Y AU - Lopez-Cortes A AU - Soeldner A AD - CIBNOR, La Paz, BCS, MexicoOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USAMaya, Y, CIBNOR, Mar Bermejo 195,Col Playa Palo Sta Rita, La Paz, BCS, Mexico TI - Cyanobacterial microbiotic crusts in eroded soils of a tropical dry forest in the Baja California peninsula, Mexico AB - This study deals with the cyanobacterial composition, and the nitrogen fixation of four members, of cryptobiotic crusts collected from eroded soils in a transitional area between arid and tropical climatic environments. Identification was based on microscopic analyses. Morphotypes were identified directly from reactivated natural crusts and from cultured strains. The identified morphotypes were Scytonema cf. ocellatum; Scytonema sp., Microcoleus cf. paludosus; M. cf. sociatus; Calothrix cf. elenkinii; C. cf. marchica; Nostoc cf. microscopicum; and Phormidium sp. Results show that the cyanobacterial composition of the microbiotic crusts studied is different from those in warmer and cooler deserts, particularly the absence of Microcoleus cf. vaginatus and Nostoc cf. commune in our samples. Such differences could be caused by the transitional character of the area. The results of the acetylene reduction assay show that the capacity of nitrogen fixation of some morphotypes is limited to the heterocyst-forming morphotypes MH - Mexico|Baja California Sur MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-0451 UR - ISI:000178512700003 L2 - Calothrix;cyanobacteria;Microcoleus;nitrogen fixation;Phormidium;Scytonema;soil crusts;soil erosion;NITROGEN-FIXATION; DESERT CRUSTS SO - Geomicrobiology Journal 2002 ;19(5):505-518 6103 UI - 11452 AU - Mayorga-Cruz D AU - Mel'nikov IV AD - Univ Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaMayorga-Cruz, D, Univ Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Relaxation oscillations in solid-state laser containing a polarizable saturable absorber AB - In this work we present a numerical study of a three-level laser containing a polarizable saturable absorber inside the cavity. This model allows us to study the kinetics of solid-state lasers in a general form. The stability of Q-switching regime is analyzed by means of numerical solution of rate equations; and main results of our analysis let us suggest that under certain conditions, the laser may pass from unstable relaxation oscillations to a stable cw operation by changing the mutual orientation of the absorber and polarizer, or by choosing the pump level MH - Mexico|Morelos MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000174822800001 L2 - SWITCH; OUTPUT SO - Laser Physics 2002 ;12(3):515-519 6104 UI - 11057 AU - Mazumdar A AU - Perez-Lorenzana A AD - Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - Affleck-Dine baryogenesis in large extra dimensions AB - Baryogenesis in models in which the fundamental scale is as low as 1 TeV in the context of large extra dimensions is a challenging problem. The requirement for the departure from thermal equilibrium necessarily ties any low-scale baryogenesis with that of a successful inflationary model, which automatically provides the out-of-equilibrium condition after the end of inflation. However, it is also noticeable that in these models the reheat temperature of the Universe is strongly constrained from the overproduction of Kaluza-Klein modes, which enforces a very low reheat temperature. In this paper, we describe a possible scenario for baryogenesis which has similar characteristics to an Affleck-Dine field. We notice that in order to have an adequate baryon to entropy ratio, one must to promote this Affleck-Dine field to reside in the bulk MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000175774200103 L2 - QUANTUM-GRAVITY; CONSTRAINTS; MILLIMETER; MECHANISM; COLLIDERS; SIGNALS; MODELS; SCALE; TEV SO - Physical Review D 2002 ;65(10): 6105 UI - 8372 AU - McClung MR AU - Miller PD AU - Civitelli R AU - Warren ML AU - Greenspan SL AU - Tamayo JA AU - Donley DW AU - San Martin J AD - Oregon Osteoporosis Ctr, Portland, OR, USAColorado Ctr Bone Res, Lakewood, CO, USAWashington Univ, Sch Med, Div Bone & Mineral Dis, St Louis, MO, USAPhys East, Greenville, NC, USAUniv Pittsburgh, Ctr Med, Osteoporosis Prevent & Treatment Ctr, Pittsburgh, PA, USACOMOP Osteoporosis Res Ctr, Mexico City, DF, MexicoEli Lilly & Co, Lilly Res Labs, Indianapolis, IN 46285, USA TI - Distinctive effects of teriparatide [rhPTH(1-34)] and alendronate on bone turnover and lumbar spine bone density in women with osteoporosis MH - Mexico|Distrito Federal MH - USA PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100044 SO - Osteoporosis International 2002 ;13():S18-S18 6106 UI - 10253 AU - McDowell JR AU - az-Jaimes P AU - Graves JE AD - Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Gloucester Point, VA 23062, USAUNAM, Lab Genet Organismos Acuat, Inst Ciencias Mar & Limnol, Mexico City, DF, MexicoMcDowell, JR, Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Rt 1208 Greate Rd Gloucester Point, Gloucester Point, VA 23062 USA TI - Isolation and characterization of seven tetranucleotide microsatellite loci from Atlantic northern bluefin tuna Thunnus thynnus thynnus AB - Microsatellite-enriched genomic libraries were obtained from the Atlantic northern bluefin tuna, Thunnus thynnus thynnus and seven tetranucleotide markers were successfully isolated and characterized from this library. These markers were found to have between 1 and 17 alleles in Atlantic northern bluefin tuna and heterozygosity ranged from 0 to 0.85. No deviations from the expectation of Hardy-Weinburg equilibrium were found for any marker. Several of these markers amplify reliably in other tuna species MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000177964300005 L2 - Atlantic northern bluefin tuna;microsatellites;population structure;Thunnus thynnus thynnus SO - Molecular Ecology Notes 2002 ;2(3):214-216 6107 UI - 11347 AU - Mcgiff JC AU - Escalante B AU - Oyekan AO AD - New York Med Coll, Valhalla, NY 10595, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoTexas So Univ, Houston, TX 77004, USA TI - 20 hydroxyeicosatetraenoic acid (HETE) mediates endothelin-1 (ET-1) effects in rat proximal tubules (PTs) MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593900652 SO - Faseb Journal 2002 ;16(5):A843-A843 6108 UI - 9818 AU - McGrady MJ AU - Maechtle TL AU - Vargas JJ AU - Seegar WS AU - Pena MCP AD - Earthspan, Glen Arm, MD 21057, USAFdn Ara, Monterrey 64988, NL, MexicoMcGrady, MJ, Nat Res Ltd, Am Rosenhugel 59, A-3500 Krems, Austria TI - Migration and ranging of Peregrine Falcons wintering on the Gulf Of mexico coast, Tamaulipas, Mexico AB - Movements of 11 female and 1 male adult Peregrine Falcons (Falco peregrinus) wintering in coastal Gulf of Mexico, Tamaulipas, Mexico, were monitored with satellite-received transmitters (PTTs), 1997-1998. Median areas for minimum convex polygon winter home ranges at 50% and 90% levels (both years) were 1173 and 8311 ha, respectively. Most birds left wintering grounds in the first week of May. Duration of northward migration averaged 30 days. Distances between capture location and summer settling place were between 4580 and 5844 km; birds traversed 40.4-46.4 degrees of latitude. Birds summered between far western Canada and coastal west Greenland. One was followed to the same summering ground in both years. Autumnal migration routes were through the middle of the continent, and initiated in August and September. Falcons arrived on wintering grounds in September and October, averaging 40 days to make the journey. PTT data and capture locations of birds trapped in more than 1 year suggest fidelity to wintering areas, although perhaps not particular winter home ranges MH - Austria MH - Mexico|Nuevo Leon MH - USA PB - LAWRENCE: COOPER ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Ornithology U5 - J;Article AV - English IS - 0010-5422 UR - ISI:000179348100004 L2 - bird migration;Falco peregrinus;Mexico;nonbreeding grounds;Peregrine Falcon;winter ranging;ROUTES; SATELLITE; BEHAVIOR; RATES; TEXAS SO - Condor 2002 ;104(1):39-48 6109 UI - 11346 AU - Meade P AU - Hoover R AU - Vazquez N AU - Gamba G AU - Hebert SC AD - INCMNSZ, Mexico City 14000, DF, MexicoUNAM, Mexico City 14000, DF, MexicoYale Univ, Sch Med, New Haven, CT, USA TI - Regulation of the renal-specific Na-K2Cl cotransporter surface expression by the shorter C-terminal spliced isoform MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593900649 SO - Faseb Journal 2002 ;16(5):A842-A842 6110 UI - 11677 AU - Medina-Boudri A AU - Cornejo DR AU - Bertorello HR AU - Matutes-Aquino J AD - Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv Nacl Cordoba, FaMAF, RA-5000 Cordoba, ArgentinaMedina-Boudri, A, Ctr Invest Mat Avanzados, Miguel de Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Mexico TI - Reversible processes in magnetization reversal of co-precipitated cobalt ferrite AB - A study of the magnetization reversal process at 300 K in a co-precipitated cobalt ferrite material was carried out. The evolution of the reversible M-tet and irreversible M-irr magnetization components were determined by measuring sets of recoil curves from different points on the initial magnetization curve and mayor demagnetization curve (Isothermal Remanent Magnetization and Direct Current Demagnetization Methods), The M-rep (M-in)(in) curves at constant H < H-c, where H-c is the coercivity of the sample, exhibit a well-defined maximum (minimum) for the initial magnetization (demagnetization) process. This is characteristic of an increasing in the total domain wall area in the material during the processes of magnetization and demagnetization. This behavior for M-ret, and the shape of the η= (&PARTIAL;M-res/&PARTIAL;M-in)(n) function, suggest that domain wall movement subject to pinning is the dominant mechanism for the reversal magnetization process in this material MH - Argentina MH - Mexico|Chihuahua PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000174151200030 L2 - cobalt ferrite;magnetization reversal;reversible and irreversible magnetization;pinning;IRREVERSIBLE MAGNETIZATION SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2002 ;41(1):154-157 6111 UI - 11506 AU - Medina A AU - Luna E AU - Perez-Rosales C AU - Higuera FJ AD - IMP, Grp Medios Porosos & Granulados, Programa YNF, Mexico City 07730, DF, MexicoETS Ingn Aeronaut, Madrid 28040, SpainMedina, A, IMP, Grp Medios Porosos & Granulados, Programa YNF, AP 14-805, Mexico City 07730, DF, Mexico TI - Thermal convection in tilted porous fractures AB - We study theoretically and experimentally the thermal convection in long tilted fractures filled with a porous material (porous layer) embedded in an impermeable solid and saturated with a fluid. The solid is subjected to a constant, vertical temperature gradient and has thermal conductivity larger than that of the saturated porous layer. We discuss different cases of interest in terms of the fracture aspect ratio and the fracture-to-solid conductivity ratio. Analytical expressions for the temperature and velocity profiles of the flow in the porous layer are worked out for low-Rayleigh-number flows MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000174715200035 SO - Journal of Physics-Condensed Matter 2002 ;14(9):2467-2474 6112 UI - 9615 AU - Medina LM AU - Martin SJ AU - Espinosa-Montano L AU - Ratnieks FLW AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Apicultura, Merida 97100, Yucatan, VenezuelaUniv Sheffield, Dept Anim & Plant Sci, Lab Apiculture & Social Insects, Sheffield S10 2TN, S Yorkshire, EnglandUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Mexico City 04510, DF, MexicoMedina, LM, Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Apicultura, Apartado Postal 4-116, Merida 97100, Yucatan, Venezuela TI - Reproduction of Varroa destructor in worker brood of Africanized honey bees (Apis mellifera) AB - Reproduction and population growth of Varroa destructor was studied in ten naturally infested, Africanized honey bee (AHB) (Apis mellifera) colonies in Yucatan, Mexico. Between February 1997 and January 1998 monthly records of the amount of pollen, honey, sealed worker and drone brood were recorded. In addition, mite infestation levels of adult bees and worker brood and the fecundity of the mites reproducing in worker cells were determined. The mean number of sealed worker brood cells (10,070 +/- 1,790) remained fairly constant over the experimental period in each colony. However, the presence and amount of sealed drone brood was very variable. One colony had drone brood for 10 months and another for only 1 month. Both the mean infestation level of worker brood (18.1 +/- 8.4%) and adult bees (3.5 +/- 1.3%) remained fairly constant over the study period and did not increase rapidly as is normally observed in European honey bees. In fact, the estimated mean number of mites fell from 3,500 in February 1997 to 2,380 in January 1998. In May 2000 the mean mite population in the study colonies was still only 1,821 mites. The fertility level of mites in this study was much higher (83-96%) than in AHB in Brazil (25-57%), and similar to that found in EHB (76-94%). Mite fertility remained high throughout the entire study and was not influenced by the amount of pollen, honey or worker brood in the colonies MH - United Kingdom MH - Mexico|Distrito Federal MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0168-8162 UR - ISI:000179745900007 L2 - Africanized bees;Apis mellifera;Mexico;reproduction;tolerance;Varroa destructor;JACOBSONI OUD; L. COLONIES; MITE; YUCATAN; MEXICO; INFESTATION; CELLS; SUSCEPTIBILITY; BRAZIL SO - Experimental and Applied Acarology 2002 ;27(1-2):79-88 6113 UI - 9319 AU - Medina R AU - Escamilla M AU - Dassori A AU - Contreras S AU - Levinson D AU - Raventos H AU - Montero P AU - Balderas T AU - Ontiveros A AU - Nicolini H AU - Mendoza R AU - Camacho A AU - Delgado A AD - Univ Texas, Hlth Sci Ctr, San Antonio, TX 78284, USAS Texas Vet Hlth Syst, San Antonio, TX, USAUniv Penn, Sch Med, Philadelphia, PA 19104, USAUniv Costa Rica, San Jose, Costa RicaUniv Nuevo Leon, Monterrey, MexicoInst Nacl Psiquiatria, Mexico City, DF, MexicoUniv Calif Los Angeles, Los Angeles, CA, USAUniv Calif San Diego, San Diego, CA 92103, USA TI - Cluster analysis of schizophrenia patients using lifetime dimensions of psychosis MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000178414400443 SO - American Journal of Medical Genetics 2002 ;114(7):859-859 6114 UI - 9355 AU - Medrano A AU - Anderson WJ AU - Millar JD AU - Holt WV AU - Watson PF AD - Univ London Royal Vet Coll, Dept Vet Basic Sci, London NW1 OTU, EnglandZool Soc London, Inst Zool, London NW1 4RY, EnglandMedrano, A, Natl Autonomous Univ Mexico, Fac Estudios Super Cuautitlan, Dept Anim Sci, Cuautitlan 54740, Mexico TI - A custom-built controlled-rate freezer for small sample cryopreservation studies AB - A custom-built controlled-rate freezing machine is described. It operates by automatically raising and lowering the sample carrier in a static column of liquid nitrogen vapour. It is controlled by a computer-assisted thermocouple feedback system that operates a stepper motor driving the sample carrier. The cooling protocol is divided into three phases: cooling from +5 to -5degreesC, initiation of ice nucleation, and cooling from -5 to -80degreesC. Experiments are described to validate the device over a range of different cooling rates. A freezing protocol is established to cool samples in plastic straws over a range of rates up to 80degreesC min(-1), with rapid and consistent absorption of the latent heat MH - United Kingdom MH - Mexico|Estado De Mexico PB - LONDON: CRYO LETTERS RP - NOT IN FILE U3 - TC 3 U4 - Biology;Physiology U5 - J;Article AV - English IS - 0143-2044 UR - ISI:000180530700007 L2 - cooling rate;latent heat of fusion;boar spermatozoa;controlled-rate freezer;ACROSOMAL INTEGRITY; BOAR SEMEN; SPERMATOZOA; FROZEN; VELOCITY; MOTILITY; STRAWS; SPERM SO - Cryoletters 2002 ;23(6):397-404 6115 UI - 10541 AU - Medrano A AU - Cabrera F AU - Gonzalez F AU - Batista M AU - Gracia A AD - Natl Autonomous Univ Mexico, Fac Super Studies Cuautitlan, Dept Anim Sci, Cuautitlan, MexicoUniv Las Palmas Gran Canaria, Fac Vet, Unit Reprod & Obstet, Las Palmas Gran Canaria, SpainMedrano, A, Natl Autonomous Univ Mexico, Fac Super Studies Cuautitlan, Dept Anim Sci, Cuautitlan, Mexico TI - Is sperm cryopreservation at-150 degrees C a feasible alternative? AB - A series of experiments was carried out to validate a -150degreesC ultra-low temperature freezer for its possible use to properly freeze and store semen. In the first part, crude sample handling was simulated to see whether temperature of stored samples was maintained within a safe range; also, the freezing point and latent heat of fusion plateau of a semen extender were monitored. In the second part, buck semen was (i) frozen in liquid nitrogen and stored in the ultra-low freezer, (ii) frozen and stored in the ultra-low freezer, and (iii) frozen and stored in liquid nitrogen, to compare sperm cryosurvival between freezing methods. Both, frequent removal of samples and long opening of the freezer door did not negatively affect stored sample temperature; latent heat of fusion plateau was 5 minutes long. Semen stored either at -150degreesC or at -196degreesC cryosurvived similarly after 2 days and after 2 months of cryopreservation MH - Mexico|Estado De Mexico MH - Spain PB - LONDON: CRYO LETTERS RP - NOT IN FILE U3 - TC 2 U4 - Biology;Physiology U5 - J;Article AV - English IS - 0143-2044 UR - ISI:000177248500006 L2 - semen;goat;freezing;ultra-low temperature freezer;SPERMATOZOA SO - Cryoletters 2002 ;23(3):167-172 6116 UI - 11781 AU - Medrano A AU - Watson PF AU - Holt WV AD - Univ London Royal Vet Coll, Dept Vet Basic Sci, London NW1 0TU, EnglandZool Soc London, Inst Zool, London NW1 4RY, EnglandMedrano, A, UNAM, Dept Anim Sci, Fac Super Studies Cuautitlan, Km 2-5 Carretera Cuautitlan Teoloyucan, Cuautitlan 54700, Izcalli, Mexico TI - Importance of cooling rate and animal variability for boar sperm cryopreservation: insights from the cryomicroscope AB - A series of experiments was set up to investigate the effect of different cooling rates on boar sperm cryosurvival using cryomicroscopy. The cooling protocols were split into two stages: (i) from +5degreesC to -5degreesC and (ii) from -5degreesC to -50degreesC. Fluorescent probes (SYBR14 and propidium iodide) were used to monitor plasma membrane integrity during the entire process. Cooling rates in the range 3degreesC min(-1) to 12degreesC min(-1) did not cause significant damage to the sperm plasma membrane between +5degreesC and -5degreesC; however, spermatozoa cooled at 24degreesC min(-1) to -5degreesC were slightly damaged. Motility was not particularly sensitive to variations in cooling rate. Cooling rates in the range 15degreesC min(-1) to 60degreesC min(-1) did not produce differences in sperm cryosurvival during freezing between -5degreesC and -50degreesC, or after thawing. In addition, cooling rates in the range 3degreesC min(-1) to 80degreesC min(-1) did not produce significant differences in sperm cryosurvival. However, slow freezing 3degreesC min(-1)) induced a slight increase in the percentage of plasma membrane-damaged spermatozoa (propidium iodide-positive) at -50degreesC. Inter-ejaculate and inter-boar differences in sperm cryosurvival were manifested independently of cooling rate. The sperm plasma membrane remained intact (SYBR14-positive) during cooling and freezing, but upon rewarming, the plasma membrane of a high proportion of spermatozoa was damaged (propidium iodide-positive), indicating that rewarming is a critical step of the freezing-thawing process MH - United Kingdom MH - Mexico|Estado De Mexico PB - CAMBRIDGE: SOC REPRODUCTION FERTILITY RP - NOT IN FILE U3 - TC 18 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1470-1626 UR - ISI:000173779600015 L2 - ACROSOMAL INTEGRITY; MAMMALIAN SPERM; SPERMATOZOA; FROZEN; SEMEN; STRAWS; CHOLESTEROL; VIABILITY; VELOCITY; MOTILITY SO - Reproduction 2002 ;123(2):315-322 6117 UI - 9974 AU - Meenagh A AU - Williams F AU - Ross OA AU - Patterson C AU - Gorodezky C AU - Hammond M AU - Leheny WA AU - Middleton D AD - Belfast City Hosp, No Ireland Reg Histocompatibil & Immunogenet Lab, Belfast BT9 7TS, Antrim, North IrelandUniv Ulster, Sch Biomed Sci, Coleraine BT52 1SA, Londonderry, North IrelandQueens Univ Belfast, Dept Epidemiol & Publ Hlth, Belfast BT7 1NN, Antrim, North IrelandSSA, INDRE, Dept Immunogenet, Mexico City, DF, MexicoNatal Inst Immunol, Transplantat Unit, Durban, South AfricaSultan Qaboos Univ, Transplant Immunol Lab, Muscat, OmanQueens Univ Belfast, Sch Biol & Biochem, Belfast, Antrim, North IrelandMiddleton, D, Belfast City Hosp, No Ireland Reg Histocompatibil & Immunogenet Lab, Belfast BT9 7TS, Antrim, North Ireland TI - Frequency of cytokine polymorphisms in populations from Western Europe, Africa, Asia, the Middle East and South America AB - PCR-SSOP identification procedures for IL-2, IL-6, IL-10, TNF-alpha and TNF-beta cytokine polymorphisms have been developed. Application of the procedures to a range of diverse geographically distributed populations has identified ethnic differences within the groups studied. Five populations were investigated, Northern Ireland, South African Zulu, Omani, Singapore Chinese and Mexican Mestizos. (C) American Society for Histocompatibility and Immunogenetics, 2002. Published by Elsevier Science Inc MH - Mexico|Distrito Federal MH - United Kingdom MH - Oman MH - South Africa PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 42 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000178924200011 L2 - cytokine;SNP;PCR-SSOP;populations;SYSTEMIC LUPUS-ERYTHEMATOSUS; NECROSIS-FACTOR-ALPHA; HLA-B-ALLELES; PROMOTER POLYMORPHISMS; GENE POLYMORPHISMS; TYPING STRATEGY; 5 CONTINENTS; INTERLEUKIN-10; ASSOCIATION; DISEASE SO - Human Immunology 2002 ;63(11):1055-1061 6118 UI - 9361 AU - Meersseman L AU - Verjovsky A AD - Univ Rennes 1, IRMAR, F-35042 Rennes, FranceUNAM, Math Inst, Unidad Cuernavaca, Cuernavaca, Morelos, MexicoMeersseman, L, Univ Rennes 1, IRMAR, F-35042 Rennes, France TI - A smooth foliation of the 5-sphere by complex surfaces AB - In this paper we construct a smooth, codimension-one, foliation on the 5-sphere in which every leaf is a complex surface, and such that the complex structure varies smoothly MH - France MH - Mexico|Morelos PB - PRINCETON: ANN MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0003-486X UR - ISI:000180624000006 L2 - codimension-one foliation;Levi flat CR-structures SO - Annals of Mathematics 2002 ;156(3):915-930 6119 UI - 11067 AU - Megina C AU - Carballo JL AU - Cervera JL AU - Garcia-Gomez JC AD - Univ Cadiz, Fac Ciencias Mar, Dept Biol Anim Vegetal & Ecol, Puerto Real 11510, SpainUNAM, Estac Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoUniv Sevilla, Fac Biol, Dept Fisiol & Biol Anim, E-41080 Seville, SpainMegina, C, Univ Cadiz, Fac Ciencias Mar, Dept Biol Anim Vegetal & Ecol, Apartado 40, Puerto Real 11510, Spain TI - The diet of Platydoris argo (Gastropoda : Nudibranchia) and the dietary specialization of sponge eating dorids AB - The diet of the dorid nudibranch Platydoris argo was studied in relation to prey availability, and under different environmental conditions to evaluate richness, evenness, and plasticity of its diet. In order to assess the availability of possible prey, the sponge assemblage at two different habitats was characterized. The results showed that P. argo is a relatively specialized benthic carnivore, feeding exclusively on spiculated demosponges. However, it has a relatively polyphagous diet (16 prey-species) and adapts well to contrasting patterns of prey availability at different sites. At the location with lower sponge diversity, the diet of P. argo included more prey categories, was more diverse, and less selective (lower dietary evenness), foraging preferentially on the most frequent resource, Stylopus dujardini. In contrast, at a station with a clearly more diverse and abundant sponge assemblage, the diet was more selective, and Phorbas tenacior was its principal component. Despite its trophic plasticity, P. argo displayed a specialized pattern of resource exploitation in terms of niche breadth within a given habitat. Foraging was focussed on one preferred prey (which changed from one habitat to another) as indicated by the significant positive selection indexes (S. dujardini = +0.29, P. tenacior = +0.74). The revision of quantitative data on the diet of so-called 'sponge eating dorids' indicates the existence of a more specialized guild of 'spiculated demosponge eating dorids'. Most species revised are 'non-stereotyped specialist`, which indicates that they have a polyphagous and plastic diet but only exploit one or few main prey species in each habitat. However, obligate specialists, with a monophagous (or rather oligophagous) diet also seem to be present MH - Mexico|Sinaloa MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0260-1230 UR - ISI:000175845400009 L2 - CADLINA-LUTEOMARGINATA; NICHE BREADTH; OVERLAP SO - Journal of Molluscan Studies 2002 ;68():173-179 6120 UI - 10305 AU - Meiners C AU - Cabrera I AU - Fichtner T AU - Kuropka R AU - Grottenmuller R AU - Zingerle H AU - Ibarraran C AU - Anquetil JY AD - Clariant GmbH, BU Emuls, Frankfurt, GermanyClariant GmbH, BU Textile Chem, Burgkirchen, GermanyClariant Mexico SA, Ecatepec 55540, MexicoClariant France SA, BU Emuls, F-60350 Trosly Breuil, FranceMeiners, C, Clariant GmbH, BU Emuls, Frankfurt, Germany TI - Binders for exterior coatings exhibiting low soiling tendency AB - Elastomeric coatings protect building facades and flat roofs from moisture and weather exposure. As a drawback, these coatings are prone to dirt-pickup due to the low glass transition temperature of the used polymeric binders. Strategies to overcome this enhanced soiling tendency are discussed, and the results of laboratory and outdoor soiling tests are compared. A novel method for the assessment of wet soiling tendency is presented MH - France MH - Germany MH - Mexico|Estado De Mexico PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1360 UR - ISI:000177886700022 SO - Macromolecular Symposia 2002 ;187():207-214 6121 UI - 11251 AU - Meinzen-Derr J AU - Guerrero ML AU - Altaye M AU - Ruiz-Palacios GM AU - Morrow AL AD - Childrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USAInst Nacl Ciencias Med & Nutr, Dept Infectol, Mexico City, DF, Mexico TI - Duration of exclusive breastfeeding and risk of iron deficiency anemia in a cohort of Mexican infants MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714601191 SO - Pediatric Research 2002 ;51(4):205A-205A 6122 UI - 11025 AU - Mejia-Rosales SJ AU - Gil-Villegas A AU - Ivlev BI AU - Ruiz-Garcia J AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, MexicoUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoUniv S Carolina, Dept Phys & Astron, Columbia, SC 29208, USARuiz-Garcia, J, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, Alvaro Obregon 64, San Luis Potosi 78000, Mexico TI - Computer simulations of confined colloidal systems at the air/water interface AB - We present Monte Carlo simulations in the NVT ensemble for spherical particles of diameter or interacting via a hard-core potential with a square-shoulder (SS) repulsive barrier, a square-well (SW) attraction, and a second SS repulsion. This discrete potential is used to mimic the pair interaction in confined colloidal systems at the air/water interface. The SW attraction represents a secondary minimum for-large interparticle distances, and the SS repulsion is a shallow secondary maximum after the secondary minimum. The effect of the SS range lambda(r)sigma is studied for the cases lambda(r) = 0, 6, and 7. The simulation results for the last two cases indicate the important role of the presence of the secondary maximum in-the inter-action potential, since they are able to reproduce the main features observed in colloidal particles trapped at the air/water interface, such as clustering, chain formation, foams, and the presence of voids MH - Mexico|Guanajuato MH - Mexico|San Luis Potosi MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000175951700008 L2 - AIR-WATER-INTERFACE; ATTRACTIONS; MONOLAYERS; PARTICLES; CLUSTERS SO - Journal of Physics-Condensed Matter 2002 ;14(19):4795-4804 6123 UI - 9973 AU - Mejia EB AU - Senin AA AU - Talmadge JM AU - Eden JG AD - Ctr Invest & Opt, Leon, MexicoUniv Illinois, Lab Opt Phys & Engn, Dept Elect & Comp Engn, Urbana, IL 61801, USAMejia, EB, Ctr Invest & Opt, AP 1-948, Leon, Mexico TI - Gain and saturation intensity of the green Ho : ZBLAN upconversion fiber amplifier and laser AB - The gain and saturation intensity of the green Ho-doped fluorozirconate (ZBLAN) glass fiber amplifier and laser, pumped in the red (643 less than or equal to lambda(p) less than or equal to 649 nm; F-5(5) <-- I-5(8)), have been measured. For a 2.4-μm core diameter fiber 45 em in length, the single-pass gain at 543.4 nm exceeds 12 dB for 90 mW of pump power at 643.5 nm. The saturation power for the F-5(4), S-5(2) --> I-5(8) lasing transition was determined from gain measurements to be 970 +/- 175 muW, which corresponds to a saturation intensity of 19.8 +/- 3.5 kW . cm(-2), and a stimulated emission cross section approximately one order of magnitude larger than theoretical estimates MH - Mexico|Guanajuato MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000178847200004 L2 - fiber amplifier;fiber laser;gain saturation;optical amplifier;saturation intensity;visible laser;GLASS SO - Ieee Photonics Technology Letters 2002 ;14(11):1500-1502 6124 UI - 9584 AU - Mejia JE AU - Mendoza BS AU - Palummo M AU - Onida G AU - Del Sole R AU - Bergfeld S AU - Daum W AD - Ctr Invest Opt, AC, Leon Guanajuato, MexicoUniv Roma Tor Vergata, Dipartimento Fis 2, Ist Nazl Fis Mat, I-00173 Rome, ItalyKFA Julich GmbH, Forschungszentrum, Inst Schichten & Grenzflachen, D-52428 Julich, GermanyMejia, JE, Ctr Invest Opt, AC, Leon Guanajuato, Mexico TI - Surface second-harmonic generation from Si(111)(1x1)H: Theory versus experiment AB - Comparing calculations of the second-harmonic generation (SHG) from the monohydride-terminated Si(111)(1x1)H surface with experimental spectra covering the two-photon energy range from 2.4 eV to 5.0 eV, we present a quantitative test of available state-of-the-art theory of surface SHG from a well-characterized semiconductor surface. We conclude that the density-functional theory within the local-density approximation approach with quasiparticle corrections leads to a semiquantitative agreement between theory and experiment and that the SHG arises from transition across bulk states which are perturbed by the surface. The calculations show that the spectra are sensitive to relaxations of the second-layer Si atoms MH - Germany MH - Italy MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000179677900083 L2 - OPTICAL 2ND-HARMONIC SPECTROSCOPY; POLARIZABLE-BOND MODEL; SEMICONDUCTOR SURFACES; HYDROGEN TERMINATION; MICROSCOPIC THEORY; SILICON SURFACES; SI(100) SURFACES; INTERFACES; SI(001); SI(111)-7X7 SO - Physical Review B 2002 ;66(19): 6125 UI - 11422 AU - Melendez-Rodriguez M AU - Cerda-Garcia-Rojas CM AU - Catalan CAN AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Tucuman, Inst Quim Organ, Fac Bioquim Quim & Farm, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - Mechanistic studies of the photochemical rearrangement of 1-oxolongipin-2-ene derivatives AB - Ultraviolet irradiation of (4R,5S,7S,8R,9S,10R,11R)-7,8,9-triacetyloxy-1-oxolongipin-2-ene (2) afforded the vulgarone A 7 and the pingilonene 8 derivatives as the major products, which were formed by a [1,3]-shift, together with the minor secondary photoproducts 9 and 10. The phototransformation mechanism is discussed in terms of individual ultraviolet irradiation of 7 and 8 in combination with the monitoring reaction progress of 2 by H-1 NMR measurements. The stereostructures of the new carbocyclic skeleta were geometry optimized using density functional calculations. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000174820300002 L2 - photochemistry;mechanisms;molecular modeling;density functional calculations;terpenes;longipinene;OCCURRING LONGIPINENE DERIVATIVES; APPROXIMATION; ENERGY SO - Tetrahedron 2002 ;58(12):2331-2338 6126 UI - 11274 AU - Melgoza E AU - Rodger D AD - Inst Tecnol Morelia, Morelia 58120, Michoacan, MexicoUniv Bath, Appl Electromagnet Res Ctr, Bath BA2 7AY, Avon, EnglandMelgoza, E, Inst Tecnol Morelia, Morelia 58120, Michoacan, Mexico TI - Comparison of table models of electromagnetic actuators AB - A number of possibilities for constructing table-based lumped-parameter models of linear or rotary actuators are compared. Two of them have not been published previously. The accuracy of the models is evaluated by comparing simulated results against experimental measurements taken from a prototype actuator. The computational cost of the models is also discussed MH - United Kingdom MH - Mexico|Michoacan PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9464 UR - ISI:000175086800160 L2 - actuators;finite-element method;lumped parameters;modeling;FINITE-ELEMENT METHOD; DYNAMIC ANALYSIS; LINEAR-ACTUATOR; SIMULATION SO - Ieee Transactions on Magnetics 2002 ;38(2):953-956 6127 UI - 10319 AU - Mellink E AU - Ceballos G AU - Luevano J AD - CICESE, Ensenada, Baja California, MexicoUniv Nacl Autonoma Mexico, CU, Inst Ecol, Mexico City 04510, DF, MexicoMellink, E, PMP 1079 482 W San Ysidro Blvd 2, San Ysidro, CA 92173, USA TI - Population demise and extinction threat of the Angel de la Guarda deer mouse (Peromyscus guardia) AB - We analyze the status of the Angel de la Guarda deer mouse (Peromyscus guardia), a species endemic to Mexico, based on our own fieldwork, bibliographic records and information from colleagues. This species, with different subspecies on three islands and a population of an undetermined subspecies on a fourth, was apparently common until the mid-1960s. Currently the species is critically endangered, if not already extinct. One of the subspecies and the undetermined population are presumed extinct. Of the two other subspecies, one is at least in critical condition, and the other at least reduced. The demise of the species can be attributed to the introduction of domestic cats. The case of P. guardia is a good example of the vulnerability of other taxa of endemic rodents on islands in the Gulf of California. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000177885800011 L2 - Angel de la Guarda deer mouse;island mammals;introduced cats;mammals;mammal extinction;Mexico;Rodentia;Peromyscus guardia;MAMMALIAN DIVERSITY; CONSERVATION; MEXICO; ENDANGERMENT; SYSTEMATICS SO - Biological Conservation 2002 ;108(1):107-111 6128 UI - 11312 AU - Mellink E AU - Orozco-Meyer A AD - CICESE, Ensenada, Baja California, MexicoMellink, E, CICESE, POB 434844, San Diego, CA 92143, USA TI - A group of gray whales (Eschrichtius robustus) in the Northeastern Gulf of California, Mexico MH - Mexico|Baja California MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000175099900022 L2 - NORTHERN GULF SO - Southwestern Naturalist 2002 ;47(1):129-132 6129 UI - 11062 AU - Mello PA AU - Baranger HU AD - UNAM, Inst Fis, Mexico City, DF, MexicoDuke Univ, Dept Phys, Durham, NC 27706, USAMello, PA, UNAM, Inst Fis, Mexico City, DF, Mexico TI - Statistical wave scattering: from the atomic nucleus to mesoscopic systems to microwave cavities AB - Universal statistical aspects of wave scattering by a variety of physical systems ranging from atomic nuclei to mesoscopic systems and microwave cavities are described. A statistical model for the scattering matrix, introduced in the past in the context of nuclear physics, is employed to address the problem of quantum chaotic scattering. The main application of the model is the analysis of electronic transport through ballistic mesoscopic cavities: it describes well the results from the numerical solutions of the Schrodinger equation for two-dimensional systems. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000175781700034 L2 - INFORMATION-THEORY; CHAOTIC CAVITIES; MATRIX THEORY; QUANTUM DOTS; TRANSPORT; CONDUCTANCE; LEADS SO - Physica A-Statistical Mechanics and Its Applications 2002 ;306(1-4):323-333 6130 UI - 11647 AU - Mello PA AU - Kogan E AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBar Ilan Univ, Dept Phys, Minerva Ctr, IL-52900 Ramat Gan, IsraelBar Ilan Univ, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, IsraelMello, PA, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Wave scattering through classically chaotic cavities in the presence of absorption: A maximum-entropy model AB - We present a maximum-entropy model for the transport of waves through a classically chaotic cavity in the presence of absorption. The entropy of the S-matrix statistical distribution is maximized, with the constraint = alphan: n is the dimensionality of S, and 0 less than or equal to alpha less than or equal to 1. For alpha = 1 the S-matrix distribution concentrates on the unitarity sphere and we have no absorption; for alpha = 0 the distribution becomes a delta function at the origin and we have complete absorption, For strong absorption our result agrees with a number of analytical calculations already given in the literature. In that limit, the distribution of the individual (angular) transmission and reflection coefficients becomes exponential - Rayleigh statistics - even for n = 1. For n much greater than 1 Rayleigh statistics is attained even with no absorption; here we extend the study to alpha < 1. The model is compared with random-matrix-theory numerical simulations: it describes the problem very well for strong absorption, but fails for moderate and weak absorptions. The success of the model for strong absorption is understood in the light of a central-limit theorem. For weak absorption, some important physical constraint is missing in the construction of the model MH - Israel MH - Mexico|Distrito Federal PB - BANGALORE: INDIAN ACADEMY SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0304-4289 UR - ISI:000174159000017 L2 - chaotic systems;wave propagation;INFORMATION-THEORY; RANDOM-MEDIA; TRANSMISSION; PROBABILITY; TRANSPORT SO - Pramana-Journal of Physics 2002 ;58(2):325-331 6131 UI - 11759 AU - Mencer DE AU - Hossain MA AU - Parga JR AU - Cocke DL AD - Wilkes Univ, Dept Chem, Wilkes Barre, PA 18776, USALamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710, USAInst Technol Saltillo, Dept Met & Mat Sci, Saltillo 25000, Coahuila, MexicoMencer, DE, Wilkes Univ, Dept Chem, Wilkes Barre, PA 18776, USA TI - Cu3O2 evidence from linear sweep voltammetry data MH - Mexico|Coahuila MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000173999800008 L2 - COPPER; OXIDATION; OXIDES SO - Journal of Materials Science Letters 2002 ;21(2):125-127 6132 UI - 10202 AU - Mendelson JR AU - Canseco-Marquez L AD - Utah State Univ, Dept Biol, Logan, UT 84322, USANatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Dept Biol Evolut, Mexico City 04510, DF, MexicoMendelson, JR, Utah State Univ, Dept Biol, Logan, UT 84322, USA TI - Rediscovery of the rare treefrog, Hyla cembra Caldwell, in Oaxaca, Mexico MH - Mexico|Distrito Federal MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000178233500015 L2 - POPULATION DECLINES SO - Southwestern Naturalist 2002 ;47(3):459-461 6133 UI - 9782 AU - Mendez-Bermudez JA AU - Luna-Acosta GA AU - Seba P AU - Pichugin KN AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Hradec Kralove, Dept Phys, Hradec Kralove, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicLV Kirenskii Inst Phys, Krasnoyarsk 660036, RussiaMendez-Bermudez, JA, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Understanding quantum scattering properties in terms of purely classical dynamics: Two-dimensional open chaotic billiards AB - We study classical and quantum scattering properties of particles in the ballistic regime in two-dimensional chaotic billiards that are models of electron- or micro-waveguides. To this end we construct the purely classical counterparts of the scattering probability (SP) matrix \S-n,S-m\(2) and Husimi distributions specializing to the case of mixed chaotic motion (incomplete horseshoe). Comparison between classical and quantum quantities allows us to discover the purely classical dynamical origin of certain general as well as particular features that appear in the quantum description of the system. On the other hand, at certain values of energy the tunneling of the wave function into classically forbidden regions produces striking differences between the classical and quantum quantities. A potential application of this phenomenon in the field of microlasers is discussed briefly. We also see the manifestation of whispering gallery orbits as a self-similar structure in the transmission part of the classical SP matrix MH - Czech Republic MH - Mexico|Puebla MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179176300058 L2 - BALLISTIC-TRANSPORT; POINCARE SECTIONS; CAVITIES; EIGENFUNCTIONS; LOCALIZATION; CHANNEL SO - Physical Review e 2002 ;66(4): 6134 UI - 11243 AU - Mendez-Bermudez JA AU - Luna-Acosta GA AU - Seba P AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoAcad Sci Czech Republ, Inst Phys, Prague 10, Czech RepublicMendez-Bermudez, JA, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Directional emission from microlasers with open chaotic resonators AB - Using topological classical considerations (Poincare maps) the appearance of "bow-tie" shaped resonances is predicted for certain types of waveguides. The geometry of such waveguides is chosen to yield mixed chaotic dynamics. Then, based on resonance effects, we propose the construction of directional emission microlasers using open chaotic semiconductor resonators of high refractive index MH - Czech Republic MH - Mexico|Puebla PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000175278300021 L2 - CAVITIES; BILLIARDS; RAY SO - Physica Status Solidi B-Basic Research 2002 ;230(2):385-389 6135 UI - 10661 AU - Mendez ER AU - Garcia-Guerrero EE AU - Leskova TA AU - Maradudin AA AU - Munoz-Lopez J AU - Simonsen I AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USANORDITA, Nord Inst Theoret Phys, DK-2100 Copenhagen O, DenmarkMendez, ER, Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Apdo Postal 2732, Ensenada 22800, Baja California, Mexico TI - Design of one-dimensional random surfaces with specified scattering properties AB - We propose a method for designing a one-dimensional random perfectly conducting surface which, when illuminated by a plane wave, scatters it with a prescribed angular distribution of intensity. The method is applied to the design of a surface that scatters light uniformly within a specified range of scattering angles, and produces no scattering outside this range. It is tested by computer simulations, and a procedure for fabricating such surfaces on photoresist is described. (C) 2002 American Institute of Physics MH - Denmark MH - Mexico|Baja California MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000177008900004 L2 - DIFFUSERS SO - Applied Physics Letters 2002 ;81(5):798-800 6136 UI - 10270 AU - Mendez F AU - Trevino C AU - Pop I AU - Linan A AD - Univ Cluj, Fac Math, R-3400 Cluj Napoca, RomaniaNatl Autonomous Univ Mexico, Fac Ingn, Mexico City 04510, DF, MexicoUPM, ETSI Aeronaut, Madrid 28040, SpainNatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoPop, I, Univ Cluj, Fac Math, R-3400 Cluj Napoca, Romania TI - Conjugate free convection along a thin vertical plate with internal nonuniform heat generation in a porous medium AB - The steady state heat transfer characteristics of a thin vertical strip with internal heat generation placed in a porous medium is studied in this work. The non-dimensional. temperature distribution in the strip is obtained as a function of the intensity and distribution of the internal heat sources. Both the thermally thin as the thick wall approximations are considered in this paper. The mass flow rate of fluid induced by heating the strip decreases as the longitudinal heat conduction effects along the strip decreases MH - Mexico|Distrito Federal MH - Romania MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Thermodynamics;Mechanics U5 - J;Article AV - English IS - 0947-7411 UR - ISI:000177993700011 L2 - NATURAL-CONVECTION; FLAT-PLATE; SURFACE; WALL; CONDUCTION SO - Heat and Mass Transfer 2002 ;38(7-8):631-638 6137 UI - 10045 AU - Mendez M AU - Mancha H AU - Cisneros MM AU - Mendoza G AU - Escalante JI AU - Lopez HF AD - IPN, Ctr Res & Adv Studies, Saltillo 25000, Coahuila, MexicoTechnol Inst Saltillo, Saltillo 25280, Coahuila, MexicoUniv Wisconsin, Dept Mat, Milwaukee, WI 53201, USAMendez, M, IPN, Ctr Res & Adv Studies, Saltillo 25000, Coahuila, Mexico TI - Structure of a Fe-Cr-Mn-Mo-N alloy processed by mechanical alloying AB - Elemental Fe, Cr, Mn. and Mo powders were processed by mechanical alloying to develop a nanostructured Fe-18Cr-11Mn-5Mo alloy under a N-2 atmosphere. It was found that the nitrogen contents in the as-milled powder mixture increased up to 1.6 wt pct after 190 hours processing time. The as-milled powders were then annealed under vacuum at either 1173 or 1473 K to promote the formation of the resultant equilibrium phases. In the annealed powder mixtures, depending on the temperature and nitrogen content, the phases identified by X-ray diffraction were either austenite, ferrite, or chromium nitrides, Annealing at 1173 K promoted the development of gamma-Fe, alpha-Fe. and Cr2N for all the nitrogen contents considered (0.5 to 1.6 wt pct). The volume fractions of the various phases formed were found to be strongly influenced by the nitrogen content and annealing temperature. In addition, the levels of nitrogen absorbed during processing were retained after annealing. Finally, the outcome indicates that a fully austenitic structure can be obtained by annealing powder mixtures at 1473 K with maximum nitrogen contents of up to I wt pct MH - Mexico|Coahuila MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000178508600022 L2 - HIGH-NITROGEN; SYSTEM SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2002 ;33(10):3273-3278 6138 UI - 10066 AU - Mendez N AU - Baird DJ AD - UNAM, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Lab Invertebrados Bentonicos, Mazatlan 82000, Sinaloa, MexicoUniv Stirling, Inst Aquaculture, Environm Grp, Stirling FK9 4LA, ScotlandMendez, N, UNAM, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Lab Invertebrados Bentonicos, Apdo Postal 811, Mazatlan 82000, Sinaloa, Mexico TI - Effects of cadmium on sediment processing on members of the Capitella species-complex AB - The effect of cadmium on sediment processing by laboratory-cultured specimens of Capitella sp I and Capitella sp B was investigated. Specimens were exposed to 0, 60, 90 and 140 mug Cd g(-1) dry weight sediment for a 10 day period (two census days) to observe effects of cadmium on their feeding activity. Under unstressed conditions, Capitella sp I specimens were larger, had higher biomass and produced more fecal pellets than Capitella sp B. Cadmium concentrations had no effect on pellet production and body mass Of the Studied populations. However, cadmium exposure time significantly affected Capitella sp B pellet production and body mass of both populations following different trends: after 10 days of exposure, the average processed sediment per unit worm mass decreased in Capitella sp I but increased in Capitella sp B. The latter population did not reduce its feeding activity in the presence of cadmium maybe related to the fact that it is derived from a highly polluted environment. This study has shown an unimpaired response of Capitella sp I and Capitella sp B to cadmium in their sediment processing activity, which indicates the potential importance of this species complex in the trophic transfer of metals from sediments to other marine organisms. (C) 2002 Elsevier Scicnec Ltd. All rights reserved MH - Mexico|Sinaloa MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000178582800017 L2 - Capitella;cadmium;sediment processing;bioassay;environmental impact;POPULATION-DYNAMICS; ORGANIC-MATTER; FLUORANTHENE; POLYCHAETA; METALS; CAPITATA; INVERTEBRATES; METABOLISM; POLLUTION; EXPOSURE SO - Environmental Pollution 2002 ;120(2):299-305 6139 UI - 9805 AU - Mendoza-Diaz G AU - Driessen WL AU - Reedijk J AU - Gorter S AU - Gasque L AU - Thompson KR AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoLeiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, NetherlandsUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoMendoza-Diaz, G, Univ Guanajuato, Fac Quim, Noria Alta S-N, Guanajuato 36050, Mexico TI - Synthesis, characterization and X-ray structures of the new dinucleating ligand 2,8-dimethyl-1,4,5,6,7,10,11,12-octahydroimidazo[4,5-h] imidazo[4,5-c][1,6]diazecine-5,11-diethanoic acid and its Cu(II) complex; an alternating chain of Cu(II) ions, coupled both intramolecularly and intermolecularly AB - The design and synthesis of a new, rigid dinucleating ligand 2,8-dimethyl-1,4,5,6,7,10,11,12-octahydroimidazo[4,5-h] imidazo[4,5-c][1,6]diazecine-5,11-diethanoic acid (H(2)glymeim) is reported together with its molecular and crystal structure. The rigid ligand structure is confirmed by the structure and magnetic properties of its his Cu(II) complex, [Cu-2(C16H22N6O6)(H2O)(4)](ClO4)(2)(H2O)(2), (Cu(2)glymeim). Crystals of free glymeim are composed of units Of C16H22N6O4 and eight water molecules linked by a two dimensional network of hydrogen bonds. Six of them contribute to a one-dimensional network that links the organic molecules. The 1,6-diazecine ring shows a chair conformation, with expected angles and bond distance values. A stretched conformation of the glycine residue is observed in the free ligand. When this residue is coordinated, it produces significant stress over the diazecine ring caused by the closure of the glycine residue around the metal ion. The copper complex has a dinuclear structure with a square pyramidal environment around both metal ions. The apical position in the two pyramids point to opposite directions in the molecule and they are related by an inversion center. The pyramidal bases of both copper atoms are in the same plane. The intramolecular metal-metal distance in the complex is 7.445(3) Angstrom. However, the shortest distance is of intermolecular nature, with a value of 5.378(2) Angstrom. The crystal structure of the complex consists of a chain of dinuclear units, with an alternating chain arrangement. Low temperature magnetic susceptibility and EPR are in agreement with an antiferromagnetic dinuclear behavior in solution and like a linear chain uniformly spaced, with J = -8.54 cm(-1) and alpha = 1. The magnetic behavior of this compound can be explained as the result of an intramolecular magnetic exchange (long distance), and a superexchange path through the hydrogen bond network between adjacent dinuclear molecules. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Netherlands PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000179281100008 L2 - dinuclear complexes;imidazole;diazecine ring;copper(II) complex;CRYSTAL-STRUCTURE; HEXAHYDRATE SO - Inorganica Chimica Acta 2002 ;339():51-59 6140 UI - 11487 AU - Mendoza-Marin M AU - Hoang MP AU - bores-Saavedra J AD - Univ Texas, SW Med Ctr, Dept Pathol, Dallas, TX 75230, USAReg Gen Hosp, Dept Pathol, Social Sec Syst, Mexico City, DF, MexicoAlbores-Saavedra, J, Univ Texas, SW Med Ctr, Dept Pathol, 5323 Harry Hines Blvd, Dallas, TX 75230 USA TI - Malignant stromal tumor of the gallbladder with interstitial cells of Cajal phenotype AB - Malignant mesenchymal tumors of the gallbladder are exceedingly rare. We report a malignant stromal tumor of the gallbladder with a phenotype of interstitial cells of Cajal. To our knowledge, only the benign counterpart of this tumor has been described previously. A 34-year-old woman presented with right upper quadrant abdominal pain. At the time of cholecystectomy, the gallbladder was noted to have a thickened wall and a polypoid mass arising in the neck of the gallbladder. Histologic sections showed a cellular proliferation of spindle neoplastic cells that were arranged in short fascicles. Numerous mitotic figures and foci of necrosis were noted. The neoplastic cells expressed CD117 (c-Kit protein) and vimentin. They were negative for smooth muscle actin, desmin, myoglobin, cytokeratin, 5100 protein, and CD34. Our case demonstrates that a malignant stromal tumor that is histologically and immunohistochemically identical to gastrointestinal stromal tumor can occur in the gallbladder, and that the expression of CD117 may be of therapeutic importance MH - Mexico|Distrito Federal MH - USA PB - NORTHFIELD: COLLEGE AMER PATHOLOGISTS RP - NOT IN FILE U3 - TC 16 U4 - Medical Laboratory Technology;Medicine, Research & Experimental;Pathology U5 - J;Article AV - English IS - 0003-9985 UR - ISI:000174857100019 L2 - C-KIT; CD34 SO - Archives of Pathology & Laboratory Medicine 2002 ;126(4):481-483 6141 UI - 11386 AU - Mendoza S AU - Longair MS AD - Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoUniv Cambridge, Cavendish Lab, Cambridge CB3 0HE, EnglandMendoza, S, Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico TI - Formation of internal shock waves in bent jets AB - We discuss the circumstances under which the bending of a jet can generate an internal shock wave. The analysis is carried out for relativistic and non-relativistic astrophysical jets. The calculations are carried out by using the method of characteristics for the case of steady simple waves. This generalizes the non-relativistic treatment first used by Icke in 1991. We show that it is possible to obtain an upper limit to the bending angle of a jet in order not to create a shock wave at the end of the curvature. This limiting angle has a value of similar to75degrees for non-relativistic jets with a polytropic index kappa = 4/3, similar to135degrees for non-relativistic jets with kappa = 5/3 and similar to50degrees for relativistic jets with kappa = 5/3. We also discuss under which circumstances jets will form internal shock waves for smaller deflection angles MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000175032200007 L2 - hydrodynamics;relativity;galaxies : active;galaxies : jets;VARIABLE STELLAR JETS; RADIO-SOURCES; KNOTS SO - Monthly Notices of the Royal Astronomical Society 2002 ;331(2):323-332 6142 UI - 9417 AU - Menendez M AU - Herrera J AU - Comin FA AD - Univ Barcelona, Dept Ecol, E-08028 Barcelona, SpainCINVESTAV, IPN, Meridan 97310, Yucatan, MexicoMenendez, M, Univ Barcelona, Dept Ecol, Avgda Diagonal 645, E-08028 Barcelona, Spain TI - Effect of nitrogen and phosphorus supply on growth, chlorophyll content and tissue composition of the macroalga Chaetomorpha linum (OF Mull.) Kutz in a Mediterranean coastal lagoon AB - The effect of dissolved nutrients on growth, nutrient content and uptake rates of Chaetomorpha linum in a Mediterranean coastal lagoon (Tancada, Ebro delta, NE Spain) was studied in laboratory experiments. Water was enriched with distinct forms of nitrogen, such as nitrate or ammonium and phosphorus. Enrichment with N, P or with both nutrients resulted in a significant increase in the tissue content of these nutrients. N-enrichment was followed by an increase in chlorophyll content after 4 days of treatment, although the difference was only significant when nitrate was added without P. P-enrichment had no significant effect on chlorophyll content. In all the treatments an increase in biomass was obseved after 10 days. This increase was higher in the N+P treatments. In all the treatments the uptake rate was significantly higher when nutrients were added than in control jars. The uptake rate of N, as ammonium, and P were significantly higher when they were added alone while that of N as nitrate was higher in the N+P treatment. In the P-enriched cultures, the final P-content of macroalgal tissues was ten-fold that of the initial tissue concentrations, thereby indicating luxury P-uptake. Moreover, at the end of the incubation the N:P ratio increased to 80, showing that P rather than N was the limiting factor for C. linum in the Tancada lagoon. The relatively high availability of N is related to the N inputs from rice fields that surround the lagoon and to P binding in sediments MH - Mexico|Yucatan MH - Spain PB - BARCELONA: INST CIENCIAS MAR BARCELONA RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0214-8358 UR - ISI:000180251900004 L2 - macroalgae;coastal lagoons;growth;nitrogen;phosphorus;HARVEY ESTUARINE SYSTEM; SACCA-DI-GORO; GRACILARIA-TIKVAHIAE; ULVA-RIGIDA; CLADOPHORA-VAGABUNDA; WESTERN AUSTRALIA; AMMONIUM UPTAKE; NITRATE UPTAKE; NUTRIENT; CARBON SO - Scientia Marina 2002 ;66(4):355-364 6143 UI - 11852 AU - Menendez MC AU - Garcia MJ AU - Navarro MC AU - Merchand JA AU - Rivera-Gutierrez S AU - Garcia-Sanchez L AU - Cox RA AD - Natl Inst Med Res, Div Mycobacterial Res, London NW7 1AA, EnglandUniv Autonoma Madrid, Fac Med, Dept Prevent Med, E-28029 Madrid, SpainIPN, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 06400, DF, MexicoCox, RA, Natl Inst Med Res, Div Mycobacterial Res, Ridgeway,Mill Hill, London NW7 1AA, England TI - Characterization of an rRNA operon (rrnB) of Mycobacterium fortuitum and other mycobacterial species: Implications for the classification of mycobacteria AB - Mycobacteria are thought to have either one or two rRNA operons per genome. All mycobacteria investigated to date have an operon, designated rrnA, located downstream from the murA gene. We report that Mycobacteriun fortuitum has a second rrn operon, designated rrnB, which is located downstream from the tyrS gene; tyrS is very close to the 3' end of a gene (3-mag) coding for 3-methylpurine-DNA-glycosylase. The second rrn operon of Mycobacterium smegmatis was shown to have a similar organization, namely, 5' 3-mag-tyrS-rrnB 3'. The rrnB operon of M. fortuitum was found to have a single dedicated promoter. During exponential growth in a rich medium, the rrnB and rrnA operons were the major and minor contributors, respectively, to pre-rRNA synthesis. Genomic DNA was isolated from eight other fast-growing mycobacterial species. Samples were investigated by Southern blot analysis using probes for murA, tyrS, and 16S rRNA sequences. The results revealed that both rrn,4 and rrnB operons were present in each species. The results form the basis for a proposed new scheme for the classification of mycobacteria. The approach, which is phylogenetic in concept, is based on particular properties of the rrn operons of a cell, namely, the number per genome and a feature of 16S rRNA gene sequences MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 14 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000173688300024 L2 - 16S RIBOSOMAL-RNA; COMPLETE NUCLEOTIDE-SEQUENCE; ESCHERICHIA-COLI; GENUS MYCOBACTERIUM; GROWTH-CONDITIONS; SPACER REGION; GENES; LEPRAE; TUBERCULOSIS; SMEGMATIS SO - Journal of Bacteriology 2002 ;184(4):1078-1088 6144 UI - 9096 AU - Meneses-Garcia A AU - Kumagai J AU - Takizawa T AU - Koike M AU - Kawano T AD - Int Nacl Cancerol, Mexico City, DF, MexicoTokyo Med & Dent Univ, Dept Endoscopy, Tokyo, JapanTokyo Med & Dent Univ, Dept Pathol, Tokyo, JapanMeneses-Garcia, A, Int Nacl Cancerol, Av San Fernando 22, Mexico City, DF, Mexico TI - Histopathological diagnosis of biopsy samples from early esophageal carcinoma AB - Carcinoma of the esophagus is frequently diagnosed in advanced clinical stages. When an esophagic carcinoma has infiltrated the submucosa or the muscular or serosa, metastases are a common finding. Thus, early diagnosis and opportune treatment are vital for patients with this type of neoplasms. Timely diagnosis can be done through endoscopic or X-ray studies and confirmed through a histopathological study by directed biopsy. We presently report the case of a 65 year old man with precedents of achalasia who underwent an endoscopic study using the Lugol staining technique for suspected malignant lesion classified as 0-IIc. After two biopsies it was diagnosed as early carcinoma of the esophagus and was subjected to mucosectomy. Histopathological findings are reviewed at architectural and cellular level and are essential to establish the diagnosis of early neoplastic lesions of the esophagus epithelium. These cellular changes are corroborated by immunohistochemical studies with nuclear expression of p53. The relevant literature was reviewed and experiences by Japanese and North American pathologists compared with emphasis on the need for multidisciplinary management to make an early diagnosis by endoscopic studies, Lugol staining, X-rays, biopsy and conservative treatment based on mucosectomy MH - Japan MH - Mexico|Distrito Federal PB - ROME: APSIT ASSOC PROM STUD IMMUNOL TUMOR RP - NOT IN FILE U3 - TC 0 U4 - Oncology U5 - J;Editorial Material AV - English IS - 0392-9078 UR - ISI:000181083800024 L2 - early cancer;esophageal cancer;diagnosis of early cancer;SQUAMOUS-CELL CARCINOMA; DYSPLASIA; P53; SUPPRESSOR; LESIONS; CANCER SO - Journal of Experimental & Clinical Cancer Research 2002 ;21(4):621-626 6145 UI - 11683 AU - Mennickent RE AU - Tovmassian G AU - Zharikov SV AU - Tappert C AU - Greiner J AU - Gansicke BT AU - Fried RE AD - Concepcion Univ, Fac Ciencias Fis & Matemat, Dept Fis, Concepcion, ChileUNAM, Observ Astron Nacl, Astron Inst, Ensenada 22860, Baja California, MexicoAstrophys Inst Potsdam, D-14482 Potsdam, GermanyBraeside Observ, Flagstaff, AZ 86002, USAUniv Sternwarte, D-37083 Gottingen, GermanyMennickent, RE, Concepcion Univ, Fac Ciencias Fis & Matemat, Dept Fis, Casilla 160-C, Concepcion, Chile TI - On the secondary star of the cataclysmic variable 1RXS J094432.1+035738 AB - We present V and R-c-band photometry and optical near-infrared spectroscopy of the cataclysmic variable 1RXS J094432.1+035738. We detected features of a cool secondary star, which can be modeled with a red dwarf of spectral type M2(-1.0)(+0.5) V at a distance of 433 +/- 100 pc MH - Chile MH - Germany MH - Mexico|Baja California MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000174185400023 L2 - stars : individual : 1RXS J094432.1+035738;novae;cataclysmic variables;stars : fundamental parameters;stars : evolution;binaries : general;SOUTHERN SPECTROPHOTOMETRIC STANDARDS SO - Astronomy & Astrophysics 2002 ;383(3):933-937 6146 UI - 9587 AU - Mercado-Sierra A AU - Mena-Portales J AU - Guarro J AU - Heredia-Abarca G AD - Univ Rovira & Virgili, Unitat Microbiol, Fac Med & Ciencies Salut, E-43201 Reus, SpainMinist Ciencia Tecnol & Medio Ambiente, Inst Ecol & Sistemat, Havana, CubaInst Ecol, Xalapa 91000, Veracruz, MexicoGuarro, J, Univ Rovira & Virgili, Unitat Microbiol, Fac Med & Ciencies Salut, C St Llorenc 21, E-43201 Reus, Spain TI - Veracruzomyces, a new anamorphic genus from Mexico AB - A new anamorph genus, Veracruzomyces, with V obclavatus as the type species, is described and illustrated. The fungus was found growing on old conidiophores of Helminthosporium velutinum on unknown branches in Veracruz, Mexico. It is characterized by an unusual combination of a peculiar percurrent proliferation of conidiogenous cells and obclavate, rostrate, muriform large conidia. It is compared with other genera and species of hyphomycetes MH - Cuba MH - Mexico|Veracruz MH - Spain PB - STUTTGART: GEBRUDER BORNTRAEGER RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0029-5035 UR - ISI:000179609200017 L2 - hifomicetes;hojarasca;taxonomia;Mexico SO - Nova Hedwigia 2002 ;75(3-4):533-537 6147 UI - 7743 AU - Mercado-Silva N AU - Lyons JD AU - Maldonado GS AU - Nava MM AD - Univ Wisconsin, Ctr Limnol, Madison, WI 53706, USAState Wisconsin Dept Nat Resources, Monona, WI 53716, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Michoacana San Nicolas de Hidalgo, Fac Biol, Morelia, Michoacan, MexicoMercado-Silva, N, Univ Wisconsin, Ctr Limnol, 680 N Pk St, Madison, WI 53706 USA TI - Validation of a fish-based index of biotic integrity for streams and rivers of central Mexico AB - An existing version of a fish assemblage-based index of biotic integrity (IBI) for the streams and rivers of west central Mexico was tested with independent data to validate its usefulness as a measure of ecosystem quality and to determine the geographic area where it is effective. Fish assemblages from 63 upland sites in 10 basins in central Mexico ( Armeria, Ameca, Coahuayana, Marabasco, Purificacion, Grande de Morelia, Grande de Santiago, Lerma, Balsas and Panuco) were assessed using the metrics and scoring criteria from the existing IBI and then compared with independent evaluations of habitat and water quality. IBI scores were congruent with habitat and water quality values in the Armeria, Purificacion and Marabasco basins, where the IBI was first developed, as well as in the adjacent Ameca and Coahuayana basins. We conclude that the IBI can be used without modification to assess environmental quality in non-coastal streams and rivers within these five basins. Further data are needed from the Grande de Morelia, Grande de Santiago and middle Lerma basins, but our results suggest that the existing IBI may also be effective here. However, the existing IBI does not consistently reflect habitat and water quality conditions in the Balsas and Panuco basins and must be modified before it can be applied there. Necessary modifications in the Balsas basin appear to be small and related primarily to changes in the scoring criteria for metrics. However, in the Panuco basin more substantive changes in the nature of the metrics are required. Changes in the IBI for these basins are proposed. The IBI is now validated for use in river monitoring, conservation and restoration efforts in 5 basins in west central Mexico and suggestions for its application in other basins are available here MH - USA MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0960-3166 UR - ISI:000184595600008 L2 - environmental quality;fish;index of biotic integrity (IBI);Mexico;rivers;WEST-CENTRAL MEXICO; BIOLOGICAL INTEGRITY; ECOSYSTEM CONDITION; CONSERVATION; ASSEMBLAGES SO - Reviews in Fish Biology and Fisheries 2002 ;12(2):179-191 6148 UI - 11470 AU - Mercado A AU - Mount DB AU - Cortes R AU - Vazquez N AU - Gamba G AD - INCMNSZ, Mol Physiol Unit, Mexico City, DF, MexicoUNAM, Mexico City, DF, MexicoHarvard Univ, Sch Med, Brigham & Womens Hosp, Boston, MA 02115, USAW Roxbury VA Med Ctr, Boston, MA, USA TI - Functional characterization of two alternative Isoforms of tire KCC3K-Cl cotransporter MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533600325 SO - Faseb Journal 2002 ;16(4):A58-A58 6149 UI - 9874 AU - Mercado GA AU - Luce BP AU - Xin J AD - Georgia Inst Technol, Sch Math, Atlanta, GA 30332, USAUniv Autonoma Zacatecas, Fac Matemat, Zacatecas 98068, MexicoLos Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USAUniv Texas, Dept Math, Austin, TX 78712, USAUniv Texas, TICAM, Austin, TX 78712, USAMercado, GA, Georgia Inst Technol, Sch Math, Atlanta, GA 30332, USA TI - Modelling thermal front dynamics in microwave heating AB - The formation and propagation of thermal fronts in a cylindrical medium that is undergoing microwave heating is studied in detail. The model consists of Maxwell's wave equation coupled to a temperature diffusion equation containing a bistable nonlinear term. When the thermal diffusivity is sufficiently small the leading-order temperature solution of a singular perturbation analysis is used to reduce the system to a free boundary problem. This approximation is then used to derive predictions for the steady-state penetration and profiles of the temperature and electric fields. These solutions are valid for arbitrary values of the electric conductivity, and thus extend the previous (small conductivity) results found in the literature. A quasi-static approximation for the electric field is then used to obtain an ordinary differential equation for the relaxation dynamics to the steady state. This equation appears to accurately describe the time scale of the electric field's evolution both with and without the presence of a strongly coupled temperature front, and may be of wider interest than the model for microwave heating studied here MH - Mexico|Zacatecas MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0272-4960 UR - ISI:000179121000001 L2 - front dynamics;Maxwell's wave;microwave heating;thermal fronts SO - Ima Journal of Applied Mathematics 2002 ;67(5):419-439 6150 UI - 9861 AU - Mercado R AU - Lopez S AU - Cantu C AU - Sanchez A AU - Revuelta R AU - Gomez-Llata S AU - Bouffard JA AU - Pineda C AD - Inst Nacl Cardiol Ignacio Chavez, Dept Rheumatol, Mexico City 14080, DF, MexicoInst Nacl Neurol & Neurocirurgia Manuel Velasco S, Dept Neurosurg, Mexico City, DF, MexicoInst Nacl Neurol & Neurocirurgia Manuel Velasco S, Dept Neuroradiol, Mexico City, DF, MexicoInst Nacl Neurol & Neurocirurgia Manuel Velasco S, Stroke Clin, Mexico City, DF, MexicoHenry Ford Hosp, Dept Diagnost Radiol, Detroit, MI 48202, USAPineda, C, Inst Nacl Cardiol Ignacio Chavez, Dept Rheumatol, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Intracranial aneurysms associated with unsuspected aortic coarctation - Report of three cases and review of the literature AB - Intracranial aneurysms (IAs) are found more often in patients with aortic coarctation (AC) than in the general population and aneurysm rupture occurs much earlier in the lives of these patients when there is coexistent AC. The diagnosis of AC is frequently made only after a serious cerebrovascular complication has developed. The aim of this paper is to call attention to AC in patients presenting with aneurysmal subarachnoid hemorrhage. The literature is reviewed, the key clinical features are highlighted, and the proposed pathogenesis of this association is discussed. The authors present clinical information and imaging data obtained in three young patients with ruptured IAs that were associated with initially unnoticed AC. Abnormal results of cardiovascular examinations led the authors to consider an underlying AC, which was later confirmed by aortography. These aneurysms were successfully treated prior to correction of the ACs. The diagnosis of AC should be considered in adolescent and young adult patients presenting with IAs MH - Mexico|Distrito Federal MH - USA PB - CHARLOTTESVILLE: AMER ASSOC NEUROLOGICAL SURGEONS RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology;Surgery U5 - J;Article AV - English IS - 0022-3085 UR - ISI:000179109800036 L2 - intracranial aneurysm;cardiovascular disease;aortic coarctation;subarachnoid hemorrhage;POSSIBLE PATHOGENETIC FACTOR; CONGENITAL HEART-DISEASE; NEURAL CREST; MANAGEMENT SO - Journal of Neurosurgery 2002 ;97(5):1221-1225 6151 UI - 11783 AU - Merrill CE AU - Riesgo-Escovar J AU - Pitts RJ AU - Kafatos FC AU - Carlson JR AU - Zwiebel LJ AD - Vanderbilt Univ, Dept Biol Sci, Program Dev Biol, Nashville, TN 37235, USAVanderbilt Univ, Dept Biol Sci, Ctr Mol Neurosci, Nashville, TN 37235, USAYale Univ, Dept Mol Cellular & Dev Biol, New Haven, CT 06520, USACtr Neurobiol, Dept Dev Neurobiol, Mexico City 76001, DF, MexicoEuropean Mol Biol Lab, D-69117 Heidelberg, GermanyZwiebel, LJ, Vanderbilt Univ, Dept Biol Sci, Program Dev Biol, VU Stn B35-1812, Nashville, TN 37235 USA TI - Visual arrestins in olfactory pathways of Drosophila and the malaria vector mosquito Anopheles gambiae AB - Arrestins are important components for desensitization of G protein-coupled receptor cascades that mediate neurotransmission as well as olfactory and visual sensory reception. We have isolated AgArr1, an arrestin-encoding cDNA from the malaria vector mosquito, Anopheles gambiae, where olfaction is critical for vectorial capacity. Analysis of AgArr1 expression revealed an overlap between chemosensory and photoreceptor neurons. Furthermore, an examination of previously identified arrestins from Drosophila melanogaster exposed similar bimodal expression, and Drosophila arrestin mutants demonstrate impaired electrophysiological responses to olfactory stimuli. Thus, we show that arrestins in Drosophila are required for normal olfactory physiology in addition to their previously described role in visual signaling. These findings suggest that individual arrestins function in both olfactory and visual pathways in Dipteran insects; these genes may prove useful in the design of control strategies that target olfactory-dependent behaviors of insect disease vectors MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 19 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000173752500096 L2 - BETA-ARRESTIN; MAXILLARY PALP; WILD-TYPE; GENE; CDNA; PHOTORECEPTOR; RHODOPSIN; SEQUENCE; HOMOLOG; DESENSITIZATION SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(3):1633-1638 6152 UI - 10056 AU - Mersey JE AU - Millward AA AU - Martinez LM AD - Univ Guelph, Dept Geog, Guelph, ON N1G 2W1, CanadaUniv Waterloo, Waterloo, ON N2L 3G1, CanadaUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoMersey, JE, Univ Guelph, Dept Geog, Guelph, ON N1G 2W1, Canada TI - Realizing the potential of GIS in community-based management of protected areas AB - This paper explores the roles GIS technology can play in support of land management, focusing in particular on its application in protected environments such as Biosphere Reserves. These ecologically significant areas present complex planning situations since, unlike areas set aside solely for conservation, they must continue to support human populations that depend on natural resources for their economic and social well being. In situations such as marginal tropical locations, land managers often face major economic and political disincentives to the conservation of precious natural resources. The necessity for community participation and local expertise in the planning process becomes increasingly critical as GIS evolves from a basic presentation aid for spatial data to a synthesizing problem-solving tool. Coupled with enhanced community participation is the opportunity for greater education of stakeholders; the potential for GIS to serve as a medium for information gathering and dissemination is discussed. A case study in the Sierra de Manantlan Biosphere Reserve (SMBR), Mexico, is presented MH - Canada MH - Mexico|Jalisco PB - LANCASTER: PARTHENON PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 1350-4509 UR - ISI:000178666900002 L2 - GIS;community-based management;protected areas;biosphere reserves;modelling;decision support;LANDSCAPE ECOLOGY; CONSERVATION; FOREST; ELEMENTS; PATTERN SO - International Journal of Sustainable Development and World Ecology 2002 ;9(3):208-222 6153 UI - 10507 AU - Mertelj A AU - rauz-Lara JL AU - Maret G AU - Gisler T AU - Stark H AD - Jozef Stefan Inst, Ljubljana 1001, SloveniaUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Konstanz, Fachbereich Phys, D-78457 Constance, GermanyMertelj, A, Jozef Stefan Inst, Jamova 39, Ljubljana 1001, Slovenia TI - Rotational diffusion in a bistable potential AB - Using depolarized quasielastic light scattering, we have investigated the rotational diffusion of optically anisotropic colloidal particles in a dilute suspension subject to external electric and magnetic fields (E-0, B-0). The particles were produced by the polymerization of nematic liquid crystal droplets, leading to birefringent colloidal spheres whose frozen orientational order is rigidly coupled to the particle orientation. The torque on the droplet director u(t) originating from the coupling of E-0 and B-0 to the particles anisotropy in the refractive index and in the diamagnetic susceptibility, respectively, leads to a suppression of the orientational fluctuations about the direction of the external field. We observe a strong dependence of the measured relaxation rates on the field strength and on the orientation of the field relative to the scattering plane. We explain our findings by a solution of the Smoluchowski equation describing rotational diffusion in a bistable potential V (u) which has two equivalent minima separated by a potential barrier whose height is proportional to (E-0, B-0)(2) MH - Germany MH - Mexico|San Luis Potosi MH - Slovenia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000177304600004 L2 - LIGHT-SCATTERING; RELAXATION; TIME SO - Europhysics Letters 2002 ;59(3):337-343 6154 UI - 11288 AU - Messina P AU - Morini MA AU - Schulz PC AU - Ferrat G AD - Univ Nacl Sur, Dept Quim & Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaInst Mexicano Petr, Mexico City 07730, DF, MexicoSchulz, PC, Univ Nacl Sur, Dept Quim & Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - The aggregation of sodium dehydrocholate in water AB - We used a battery of different methods to study the association in aqueous sodium dehydrocholate (NaDHC) solutions. This salt associates by a stepwise mechanism. Below (9.6 +/- 4.2) x 10(-4) mol dm(-3) there is a molecular solution with some strongly insoluble dehydrocholic acid produced by hydrolysis. Between (9.6 +/- 4.2) x 10(-4) and (5.2 +/- 2.2) x 10(-3) mol dm(-3), an aggregate similar to acid soap (NaDHC.HDHC) appears and its amount and the aggregate's size increase with concentration. At = (2.20 +/- 0.85) x 10(-2) Mol dm(-3) the aggregates formed have properties usually associated with true micelles, such as solubilisation of water-insoluble dyes. These aggregates increase in size with concentration and change their shape at 8 X 10(-2) mol dm(-3), giving nonsymmetrical aggregates. The changes in the solution physicochemical properties at these concentrations may be misinterpreted and this explains the different values of the critical micelle concentration reported in the literature for substances with similar structure, such as bile salts MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000175285400005 L2 - sodium dchydrocholate;micelles;stepwise association;bile salts;critical micelle concentration;BILE-ACID SALTS; SELF-ASSOCIATION; AQUEOUS-SOLUTIONS; TAUROCHOLATE; TAURODEOXYCHOLATE; MICELLAR; BEHAVIOR; CHOLATE; SOLUBILIZATION; PATTERNS SO - Colloid and Polymer Science 2002 ;280(4):328-335 6155 UI - 9979 AU - Messina R AU - Gonzalez-Tovar E AU - Lozada-Cassou M AU - Holm C AD - Max Planck Inst Polymer Res, D-55128 Mainz, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoMessina, R, Max Planck Inst Polymer Res, Ackermannweg 10, D-55128 Mainz, Germany TI - Overcharging: The crucial role of excluded volume AB - In this letter we investigate the mechanism for the overcharging of a single spherical colloid in the presence of aqueous salts within the framework of the primitive model by molecular dynamics (MD) simulations as well as integral-equation theory. We find that the occurrence and strength of overcharging strongly depends on the salt-ion size, and the available volume in the fluid. To understand the role of the excluded volume of the microions, we first consider an uncharged system. For a fixed bulk concentration we find that upon increasing the fluid particle size one strongly increases the local concentration nearby the colloidal surface and that the particles become laterally ordered. For a charged system the first surface layer is built up predominantly by strongly correlated counterions. We argue that this is a key mechanism to produce overcharging with a low electrostatic coupling, and as a more practical consequence, to account for charge inversion with monovalent aqueous salt ions MH - Germany MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 32 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000178821900009 L2 - HYPERNETTED CHAIN APPROXIMATION; ELECTRICAL DOUBLE-LAYER; CHARGE INVERSION; HARD-SPHERES; MONTE-CARLO; MULTIVALENT COUNTERIONS; MODEL; MACROION; SURFACE; IONS SO - Europhysics Letters 2002 ;60(3):383-389 6156 UI - 10449 AU - Mexal JG AU - Rangel RAC AU - Negreros-Castillo P AU - Lezama CP AD - New Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USAINIFAP, Coyoacan 04110, DF, MexicoIowa State Univ, Dept Forestry, Ames, IA 50011, USAINIFAP, Quintana Roo, DF, MexicoMexal, JG, New Mexico State Univ, Dept Agron & Hort, POB 3Q, Las Cruces, NM 88003 USA TI - Nursery production practices affect survival and growth of tropical hardwoods in Quintana Roo, Mexico AB - Tropical forests are endangered from deforestation and overexploitation. The objective of this study was to examine the effects of production practices of the tropical hardwoods, mahogany and Spanish cedar, on survival and early growth in the state of Quintana Roo, Mexico. Mahogany seedlings were grown in polybags and Spanish cedar seedlings were grown in bareroot nursery beds. In addition, seedlings of both species were grown in R-L containers for the outplanting comparison. Fertilization had a minor affect on seedling morphology, but the amount of shade had a strong affect on seedling morphology in the nursery. Following outplanting, initial seedling diameter influenced seedling survival and growth. Survival and growth of Spanish cedar was strongly correlated with initial seedling diameter. Seedlings larger than 4 mm had excellent survival and good growth. Large diameter (>5 mm) mahogany seedlings had exceptional growth, achieving over 4 m in height at 57 months There appeared to be no interaction between stocktype and performance. Polybag mahogany seedlings were larger than containerized seedlings, and grew better. Conversely, containerized cedar seedlings were larger than the bareroot seedlings and performed better. Nearly all the bareroot cedar seedlings had died by 57 months, whereas 50% of the larger containerized seedlings lived. Growth of cedar was less than one-half that of mahogany. Successful reforestation of both species can be accomplished with just small improvements in seedling quality using the conventional systems. Larger seedlings survive and grow better, and on this site, mahogany was superior in performance compared to Spanish cedar. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000177478900011 L2 - Cedrela odorata;Swietenia macrophylla;caoba;cedro;polybags;bareroot nursery;reforestation;FOREST SO - Forest Ecology and Management 2002 ;168(1-3):125-133 6157 UI - 11244 AU - Meza-Montes L AU - Ulloa SE AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoOhio Univ, Dept Phys & Astron & Condensed Matter, Athens, OH 45701, USAOhio Univ, Surface Sci Program, Athens, OH 45701, USAMeza-Montes, L, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48,Col San Manuel, Puebla 72570, Mexico TI - Triangular quantum dots in magnetic fields AB - The finite-element method allows one to determine the eigenstates of an electron confined in a two-dimensional infinite well of arbitrary shape under a magnetic field. Here we study triangular billiards, which are known to exhibit singular chaotic properties. We find that the magnetic response varies according to the three different triangle classes determined by the ratio of the angles with respect to pi. As the irrationality of the angles increases, the spectra show an increasing number of avoided crossings, smoothing the peaks on the magnetic susceptibility at very low temperatures. Our results suggest that ergodicity appears as the irrationality of the triangles increases MH - Mexico|Puebla MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000175278300032 L2 - BILLIARDS; ORBITS SO - Physica Status Solidi B-Basic Research 2002 ;230(2):451-456 6158 UI - 10719 AU - Meza AD AU - Meyer EM AU - Gonzalez CAL AD - UNAM, Inst Biol, Mexico City, DF, MexicoUniv Kansas, Dept Geog, Lawrence, KS 66045, USADenver Zool Fdn, Dept Conservat, Denver, CO 80205, USAGonzalez, CAL, Denver Zool Fdn, Dept Conservat, 2300 Steele St, Denver, CO 80205 USA TI - Ocelot (Leopardus pardalis) food habits in a tropical deciduous forest of Jalisco, Mexico AB - Few studies have been conducted oil the food habits of the ocelot (Leopardus pardalis), considered all endangered feline in Mexico. Past studies showed that rodents were the main component of ocelot diet. In out-study ocelot prey consumption was measured as frequency of occurrence of prey in scats and then converted to biomass. The spiny-tailed iguana (Ctenosauro, pectinata) was the most important prey of ocelots, followed by the spiny pocket mouse (Liomys pictus). Other rodents and some birds were also present in the scats, although representing only a minor proportion of the ocelot's diet. Evidence of subadult white-tailed deer (Odocoileus virginianus) was also found in scats indicating that ocelots call either capture prey bigger than themselves or are using deer as carrion MH - USA MH - Mexico|Distrito Federal PB - NOTRE DAME: AMER MIDLAND NATURALIST RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0003-0031 UR - ISI:000176839400014 L2 - FEEDING ECOLOGY; PREY SELECTION; COUGAR; LYNX SO - American Midland Naturalist 2002 ;148(1):146-154 6159 UI - 10503 AU - Michan S AU - Lledias F AU - Baldwin JD AU - Natvig DO AU - Hansberg W AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Bioquim, Mexico City 04510, DF, MexicoUniv New Mexico, Dept Biol, Albuquerque, NM 87131, USAHansberg, W, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Bioquim, Apartado Postal 70-242, Mexico City 04510, DF, Mexico TI - Regulation and oxidation of two large monofunctional catalases AB - The two Neurospora crassa catalase genes cat-1 and cat-3 were shown to encode Cat-1 and Cat-3 large monofunctional catalases. cat-1 and cat-3 genes are regulated differentially during the asexual life cycle and under stress conditions. A stepwise increase in catalase activity occurs during conidiation. Conidia have 60 times more catalase activity than exponentially growing hyphae. Cat-1 activity was predominant in conidia, during germination and early exponential growth. It was induced during prestationary growth and by ethanol or heat shock. Cat-3 activity was predominant during late exponential growth and at the start of the conidiation process. It was induced under stress conditions, such as H2O2, paraquat, cadmium, heat shock, uric acid, and nitrate treatment. In general, Cat-1 activity was associated with nongrowing cells and Cat-3 activity with growing cells. The Cat-3 N-terminus sequence indicates that this catalase is processed and presumably secreted. Paraquat caused modification and degradation of Cat-1. Under heat shock both Cat-1 and Cat-3 were modified and degraded and Cat-1 was resynthesized. Paraquat and heat shock effects were observed only in the presence of air and are probably related to in vivo generation of singlet oxygen. Purified Cat-3 was modified with a photosensitizing reaction in which singlet oxygen is produced. (C) 2002 Elsevier Science Inc MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0891-5849 UR - ISI:000177393800012 L2 - catalase;reactive oxygen species;singlet oxygen;stress;cell differentiation;conidia;Neurospora crassa;free radicals;ASPERGILLUS-NIDULANS DEVELOPMENT; NEUROSPORA-CRASSA; CELL-DIFFERENTIATION; HYPEROXIDANT STATE; SINGLET OXYGEN; AERIAL GROWTH; CLONING; GENES; CONIDIATION; DISRUPTION SO - Free Radical Biology and Medicine 2002 ;33(4):521-532 6160 UI - 8703 AU - Michelitsch TM AU - Gao HJ AU - Levin VM AD - Max Planck Inst Met Res, Dept Theory Mesoscop Phenomena, D-70569 Stuttgart, GermanyInst Mexicano Petr, Mexico City 07730, DF, MexicoMichelitsch, TM, Max Planck Inst Met Res, Dept Theory Mesoscop Phenomena, Heisenbergstr 3, D-70569 Stuttgart, Germany TI - Dynamic Eshelby tensor and potentials for ellipsoidal inclusions AB - The dynamic Eshelby inclusion problem for an ellipsoidal inclusion in a three-dimensional infinite elastic isotropic medium is considered. The dynamic Eshelby tenser is expressed in terms of solutions of the Helmholtz equation (Helmholtz potentials). A compact formulation for the components of the dynamic Eshelby tensor is derived for the inside region of the inclusion. For spheroidal inclusions, one-dimensional integrals similar to the elliptic integrals are obtained. The approach leads to closed-form expressions in cases such as spheres and continuous fibres coinciding with those given in 1990 by Mikata & Nemat-Nasser and in 2002 by Michelitsch et al. by employing other techniques. For the inside region of the inclusion, the static limit is performed in closed form and coincides with Eshelby's classical 1957 result MH - Germany MH - Mexico|Distrito Federal PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 6 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1364-5021 UR - ISI:000182247600005 L2 - Helmholtz equation;dynamic Green's function;dynamic Eshelby tensor;dynamic inclusion problem;ISOTROPIC PIEZOELECTRIC MEDIUM; INHOMOGENEITY; WAVES SO - Proceedings of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 2002 ;459(2032):863-890 6161 UI - 11713 AU - Michiue Y AU - Onoda M AU - Watanabe A AU - Watanabe M AU - Brown F AU - Kimizuka N AD - Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, JapanUniv Sonora, Dept Invest Polimeros & Mat, Sonora 83000, MexicoMichiue, Y, Natl Inst Mat Sci, Adv Mat Lab, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan TI - Crystal structure of pseudorhombohedral InFe1-xTixO3+x/2 (x=2/3) AB - The structure of pseudorhombohedral-type InFe1-xTixO3-(x/2) (x = 2/3) was refined by Rietveld profile fitting. The crystal is a commensurate member of a series in a solution range on InFeO3-In2Ti2O7 including incommensurate structures. The structure with the unit cell of a = 5.9188(1), b = 10.1112(2), and c = 6.3896(t) Angstrom, beta = 108.018(2)degrees, and a space group P2(1)/a is the alternate stacking of an edge-shared InO6 octahedral layer and an Fe/Ti-O plane along c*. Metal sites on the Fe/Ti-O plane are surrounded by four oxygen atoms on the Fe/Ti-O plane and two axial ones. Electric conductivities of the order 10(-4) S/cm were observed for the samples at 1000 K, while the oxide ion transport number is almost zero as no electromotive force was detected by an oxygen concentration cell. (C) 2002 Elsevier Science MH - Japan MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000174002700014 L2 - InFe1-xTiO3+x/2;Rietveld analysis;superstructure;composite crystal;PHASE-RELATIONS; 1100-DEGREES-C SO - Journal of Solid State Chemistry 2002 ;163(2):455-458 6162 UI - 12004 AU - Miedema H AD - Univ Cambridge, Dept Plant Sci, Cambridge CB2 3EA, EnglandMiedema, H, UAEM, Fac Ciencias, Cuernavaca 62210, Morelos, Mexico TI - Surface potentials and the calculated selectivity of ion channels AB - Ion channels catalyze the transport of ions across biological membranes. A proper understanding of ion-channel functioning is essential to our knowledge of cell physiology, and, in this context, ion-channel selectivity is a key concept. The extent to which a channel permeates two ion species, a and b, is expressed by the permeability ratio, P-a/P-b. This paper addresses a complication in the calculation of P-a/P-b that is related to the existence of surface potentials (psi) and that so far has not been fully appreciated. This paper shows the rather surprising effect of psi on the calculated P-a/P-b of a channel that is permeable to two ion species of different valence. If we ignore psi, we conclude, for instance, P-a > P-b. If we implement psi in the calculation of P-a/P-b, we may, however, conclude exactly the reverse, i.e., P-a < P-b. Because electrostatic potentials arise at the surface of essentially all biological membranes, this paper argues for a more critical evaluation of ion channel selectivity measurements MH - United Kingdom MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 6 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000173250500015 L2 - POTASSIUM CHANNEL; MEMBRANE-SURFACE; DIVALENT IONS; CHARGE; CONDUCTANCE; PERMEATION; BINDING; MODEL; JUNCTION; PH SO - Biophysical Journal 2002 ;82(1):156-159 6163 UI - 10013 AU - Mielke EW AU - Schunck FE AU - Peralta HH AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyMielke, EW, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Scalar soliton in Newtonian gravity modelling dark matter halos AB - Within standard Newtonian gravity, galactic dark matter is modelled by a scalar field in order to effectively modify Kepler's law. In particular, we show that a solvable toy model with a self-interaction U(Phi) borrowed from non-topological solitons produces already qualitatively correct rotation curves. Although relativistic effects in the halo are very small, we indicate corrections arising from the general relativistic formulation MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000178669300013 L2 - dark matter;rotation curves;scalar field models;BOSON STARS; GALAXIES; STABILITY; FIELD SO - General Relativity and Gravitation 2002 ;34(11):1919-1930 6164 UI - 10472 AU - Mielke EW AU - Schunck FE AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyMielke, EW, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico TI - Nontopological scalar soliton as dark matter halo AB - Galactic dark matter can be modeled by a scalar field coupled to standard gravity in order to effectively modify Kepler's law. In particular, we show that a solvable toy model with a self-interaction U(Phi) borrowed from nontopological solitons produces already qualitatively correct rotation curves. Although the relativistic effects in the halo are very small, our generally relativistic formulation aids at reconstructing more realistic scalar models with self-interaction MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177285600013 L2 - BOSON STARS; CATASTROPHE-THEORY; GALAXIES; STABILITY; NEUTRON; FIELD SO - Physical Review D 2002 ;66(2): 6165 UI - 10008 AU - Mikumo T AU - Yagi Y AU - Singh SK AU - Santoyo MA AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 1130032, JapanUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoMikumo, T, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Coseismic and postseismic stress changes in a subducting plate: Possible stress interactions between large interplate thrust and intraplate normal-faulting earthquakes AB - [1] A large intraplate, normal-faulting earthquake (M-w = 7.5) occurred in 1999 in the subducting Cocos plate below the downdip edge of the ruptured thrust fault of the 1978 Oaxaca, Mexico, earthquake (M-w = 7.8). This situation is similar to the previous case of the 1997 normal-faulting event (M-w = 7.1) that occurred beneath the rupture area of the 1985 Michoacan, Mexico, earthquake (M-w = 8.1). We investigate the possibility of any stress interactions between the preceding 1978 thrust and the following 1999 normal-faulting earthquakes. For this purpose, we estimate the temporal change of the stress state in the subducting Cocos plate by calculating the slip distribution during the 1978 earthquake through teleseismic waveform inversion, the dynamic rupture process, and the resultant coseismic stress change, together with the postseismic stress variations due to plate convergence and the viscoelastic relaxation process. To do this, we calculate the coseismic and postseismic changes of all stress components in a three-dimensional space, incorporating the subducting slab, the overlying crust and uppermost mantle, and the asthenosphere. For the coseismic stress change we solve elastodynamic equations, incorporating the kinematic fault slip as an observational constraint under appropriate boundary conditions. To estimate postseismic stress accumulations due to plate convergence, a virtual backward slip is imposed to lock the main thrust zone. The effects of viscoelastic stress relaxations of the coseismic change and the back slip are also included. The maximum coseismic increase in the shear stress and the Coulomb failure stress below the downdip edge of the 1978 thrust fault is estimated to be in the range between 0.5 and 1.5 MPa, and the 1999 normal-faulting earthquake was found to take place in this zone of stress increase. The postseismic variations during the 21 years after the 1978 event modify the magnitude and patterns of the coseismic stress change to some extent but are not large enough to overcome the coseismic change. These results suggest that the coseismic stress increase due to the 1978 thrust earthquake may have enhanced the chance of occurrence of the 1999 normal-faulting event in the subducting plate. If this is the case, one of the possible mechanisms could be static fatigue of rock materials around preexisting weak planes involved in the subducting plate, and it is speculated that that one of these planes might have been reactivated and fractured because of stress corrosion cracking under the applied stress there for 21 years MH - Japan MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000178909600005 L2 - thrust earthquakes;normal-faulting earthquakes;waveform inversion;subducting plate;stress interactions;1977 SUMBA EARTHQUAKE; SOUTHWEST JAPAN; DYNAMIC RUPTURE; GPS DATA; TECTONIC IMPLICATIONS; INVERSION ANALYSIS; DISLOCATION MODEL; TOKAI DISTRICT; GEODETIC DATA; COCOS PLATE SO - Journal of Geophysical Research-Solid Earth 2002 ;107(B1): 6166 UI - 11092 AU - Milan Z AU - Borja R AU - Sanchez E AU - Martin A AU - Weiland P AU - Ilangovan K AD - CNIC, DECA, Havana, CubaCONAM, Div Consultores Ambientales, Havana, CubaFAL, Inst Technol & Biosyst Tech, D-38116 Braunschweig, GermanyCSIC, Inst Grasa, E-41012 Seville, SpainFac Ciencias, Dpto Ingn Quim, Cordoba 14071, SpainNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoMilan, Z, CNIC, DECA, POB 6990, Havana, Cuba TI - Reply to the comments made by H.S. Lee et al. to the paper: "Influence of different natural zeolite concentrations on the anaerobic digestion of piggery waste" (Bioresource Technology, 80 (2001) 37-43) MH - Cuba MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Letter AV - English IS - 0960-8524 UR - ISI:000175744400017 SO - Bioresource Technology 2002 ;83(3):267-269 6167 UI - 10092 AU - Miledi R AU - Eusebi F AU - Martinez-Torres A AU - Palma E AU - Trettel F AD - Univ Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USAUniv Roma La Sapienza, Dipartimento Fisiol Umana & Farmacol, I-00185 Rome, ItalySan Raffaele Pisana, Dipartimento Sci Internistiche, I-00163 Rome, ItalyUniv Autonoma Queretaro, Lab Neurobiol Celular & Mol, Inst Neurobiol, Juriquilla 76230, Queretaro, MexicoMiledi, R, Univ Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697 USA TI - Expression of functional neurotransmitter receptors in Xenopus oocytes after injection of human brain membranes AB - The Xenopus oocyte is a very powerful tool for studies of the structure and function of membrane proteins, e.g., messenger RNA extracted from the brain and injected into oocytes leads to the synthesis and membrane incorporation of many types of functional receptors and ion channels, and membrane vesicles from Torpedo electroplaques injected into oocytes fuse with the oocyte membrane and cause the appearance of functional Torpedo acetylcholine receptors and CI- channels. This approach was developed further to transplant already assembled neurotransmitter receptors from human brain cells to the plasma membrane of Xenopus oocytes. Membranes isolated from the temporal neocortex of a patient, operated for intractable epilepsy, were injected into oocytes and, within a few hours, the oocyte membrane acquired functional neurotransmitter receptors to gamma-aminobutyric acid, alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid, kainate, and glycine. These receptors were also expressed in the plasma membrane of oocytes injected with mRNA extracted from the temporal neocortex of the same patient. All of this makes the Xenopus oocyte a more useful model than it already is for studies of the structure and function of many human membrane proteins and opens the way to novel pathophysiological investigations of some human brain disorders MH - USA MH - Italy MH - Mexico|Queretaro PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 20 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000178391700133 L2 - gamma-aminobutyric acid receptors;kainate receptors;NICOTINIC ACETYLCHOLINE-RECEPTOR; VOLTAGE-OPERATED CHANNELS; MESSENGER-RNA; GABA(A) RECEPTORS; RAT-BRAIN; RESPONSES; TORPEDO SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(20):13238-13242 6168 UI - 11551 AU - Milton KA AU - Odintsov SD AU - Zerbini S AD - Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019, USAUniv Guanajuato, Inst Fis, Lomas Del Bosque, Leon, MexicoUniv Trent, Dept Phys, Trent, ItalyUniv Trent, Grp Collegato INFN, Trent, ItalyTomsk State Pedag Univ, Tomsk, RussiaMilton, KA, Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019, USA TI - Bulk versus brane running couplings AB - A simplified higher dimensional Randall-Sundrum-like model in 6 dimensions is considered. It has been observed previously by Goldberger and Wise that in such a self-interacting scalar theory on the bulk with a conical singularity there is mixing of renormalization of 4D brane couplings with that of the bulk couplings. We study the influence of the running bulk couplings on the running of the 4D brane couplings. We find that bulk quantum effects may completely alter the running of brane couplings. In particular, the structure of the Landau pole may be drastically altered and nonasymptotically free running may turn into asymptotically safe (or free) behavior MH - Italy MH - Mexico|Guanajuato MH - Russia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000174548100086 L2 - SCALAR FIELD; BOUNDARY SO - Physical Review D 2002 ;65(6): 6169 UI - 10514 AU - Mimila-Arroyo J AU - Bland SW AU - Lusson A AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoIQE Europe Ltd, Cardiff CF3 0EG, S Glam, WalesLab Pys Solides & Cristalogenese, UMR CNRS, F-92190 Meudon, FranceMimila-Arroyo, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, AP 14-740, Mexico City 07000, DF, Mexico TI - Carbon site switching in carbon-doped GaAs AB - Carbon thermal stability in carbon-doped GaAs layers is studied. Epitaxial layers were grown by low-pressure metalorganic chemical vapor deposition extrinsically doped with an atomic carbon concentration around 1x10(20) cm(-3). The hole concentration is found to be a complex function of the annealing time, increasing from an initial value similar to7.2x10(19) cm(-3), to some intermediate value whereupon the hole concentration decreases before resuming its increase to a value consistent with the atomic concentration. The observed carrier loss and its subsequent recovery is explained by a double-site switch of one carbon from the C-As-Ga-C-As dimer. First, the carbon moves to an interstitial site C-i, where it behaves like a double donor, followed by a move to a more distant As substitutional site where it behaves as a normal shallow acceptor. This process allows to recover an additional hole concentration equal to the initial carbon dimer concentration. Both processes follow a first-order kinetics with different kinetic coefficients. (C) 2002 American Institute of Physics MH - France MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000177351600023 L2 - EPITAXIAL LAYERS; COMPENSATION; RELAXATION SO - Applied Physics Letters 2002 ;81(8):1435-1437 6170 UI - 11183 AU - Mimila-Arroyo J AU - Bland SW AU - Chevallier J AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoIQE Europe Ltd, Cardiff CF3 0EG, S Glam, WalesLab Phys Solides & Cristalogenese, UMR CNRS, F-92190 Meudon, FranceMimila-Arroyo, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, AP 14-740, Mexico City 07000, DF, Mexico TI - Carbon reactivation kinetics in the base of heterojunction GaInP-GaAs bipolar transistors AB - The reactivation kinetics of carbon acceptors in the base region of GaInP/GaAs heterojunction bipolar transistors was studied. The reactivation was achieved by ex situ thermal annealing, through a multistage annealing experiment where the carrier concentration was monitored at each stage. Results indicate that carbon reactivation follows a first-order kinetics process in which the activation energy appears to be the sum of the energy needed to debond the hydrogen from the carbon-hydrogen complex, and the energy necessary to overcome the electrostatic junction barrier. The reactivation constant is thermally activated with an activation energy of 2.83 eV and an attempt frequency of 1.2x10(13) s(-1). (C) 2002 American Institute of Physics MH - France MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000175464100056 L2 - CHEMICAL-VAPOR-DEPOSITION; P-TYPE GAAS; DOPED GAAS; DEVICE CHARACTERISTICS; THERMAL-STABILITY; HYDROGEN; EPITAXY; HBTS SO - Applied Physics Letters 2002 ;80(19):3632-3634 6171 UI - 11339 AU - Mimila-Arroyo J AU - Bland S AU - Barbe M AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoIQE Europe Ltd, Cardiff CF3 0EG, S Glam, WalesLab Phys Solide & Cristallogenese, CNRS, UMR 8635, F-92195 Meudon, FranceMimila-Arroyo, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, AP 14-740, Mexico City 07000, DF, Mexico TI - Carbon reactivation kinetics in GaAs: Its dependence on dopant precursor, doping level, and layer thickness AB - The reactivation kinetics of the acceptor behavior of carbon, its dependence on dopant precursors, doping level, layer thickness, and annealing temperature, as well as the behavior of carbon-hydrogen complexes in GaAs grown by metalorganic chemical vapor deposition are studied. Independent of the carbon source, in the "as grown" material, systematically carbon hydrogen complexes are present and the hole concentration is lower than the corresponding carbon concentration. The carbon reactivation kinetics was achieved by ex situ rapid thermal annealing through a series of multistage annealing experiments and assessed at each annealing stage by infrared absorption, hydrogen secondary ion mass spectroscopy profiling, and hole concentration measurements. Carbon reactivation occurs solely by the debonding of hydrogen from the isolated carbon acceptor and its out-diffusion from the sample. The carbon reactivation kinetics can be treated as a first order one with an activation energy, E-a=1.42+/-0.01 eV, independent of doping precursors, doping level, and layer thickness. The reactivation constant results to decrease as doping level and layer thickness increase. An empirical formula has been obtained that allows one to calculate the reactivation constant as a function of the carbon doping, layer thickness, and annealing temperature, allowing one to determine the optimal carbon reactivation conditions for any C:GaAs layer. (C) 2002 American Institute of Physics MH - France MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000175069000058 L2 - MOLECULAR-BEAM EPITAXY; CHEMICAL-VAPOR-DEPOSITION; DOPED GAAS; HOLE CONCENTRATION; PHASE EPITAXY; HYDROGEN; GROWTH; TETRACHLORIDE; TEMPERATURE; PASSIVATION SO - Journal of Applied Physics 2002 ;91(9):5923-5928 6172 UI - 9196 AU - Minichiello SN AU - Magis C AU - Uribe P AU - Anaya L AU - Bertozzi S AD - SIDA, Consejo Nacl Prevenc & Control, Dept Res, Mexico City 14050, DF, MexicoDept Hlth Policy & Econ, Cuernavaca, Morelos, MexicoCIDE, Ctr Res & Teaching Econ, Mexico City, DF, MexicoUniv Calif San Francisco, Inst Global Hlth, San Francisco, CA 94143, USAMagis, C, SIDA, Consejo Nacl Prevenc & Control, Dept Res, Calz De Tlalpan 4585, Mexico City 14050, DF, Mexico TI - The Mexican HIV/AIDS surveillance system: 1986-2001 AB - Objective: The objective of this article is to provide a comprehensive overview of the evolution of the Mexican HIV/AIDS surveillance system between 1986 and 2001. Design: All information was collected through an extensive literature search. Methods: Databases such as the Mexican National AIDS Programmes RIMSIDA (Registry of Mexican AIDS Research), MedLINE, PopLine, and AIDSLINE were used. Databases, keywords, and MeSH headings to search were discussed and agreed upon before and during the literature search. Results: Two hundred and twenty articles and conference abstracts were reviewed and showed that the Mexican surveillance system has undergone many adaptations. The HIV/AIDS surveillance system began in 1986, when the focus was on identifying AIDS cases. This period was followed by special studies among risk groups, and served as the basis for the sentinel surveillance system that was adopted in 1990. The system now requires HIV and AIDS case reporting as well as sentinel surveillance. Mexico has also carried out the piloting of the behavioural surveillance component of Second Generation Surveillance. Conclusion: The Mexican experience illustrates how surveillance systems need to be dynamic in order to monitor trends in HIV over time. This review also demonstrates that middle-income countries can successfully implement surveillance systems. However, although Mexico has had many successes, a need exists to address issues that limit its ability to implement AIDS case and behavioural surveillance fully and consistently. (C) 2002 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0269-9370 UR - ISI:000180932000003 L2 - AIDS;behavioural surveillance;HIV;surveillance;HIV; AIDS SO - Aids 2002 ;16():S13-S17 6173 UI - 9828 AU - Mirabel IF AU - Mignani R AU - Rodrigues I AU - Combi JA AU - Rodriguez LF AU - Guglielmetti F AD - CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, FranceConsejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1033 Buenos Aires, DF, ArgentinaEuropean So Observ, D-85740 Garching, GermanyInst Argentino Radioastron, RA-1894 Buenos Aires, DF, ArgentinaUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoMax Planck Inst Extraterr Phys, D-85748 Garching, GermanyMax Planck Inst Plasma Phys, D-85748 Garching, GermanyMirabel, IF, CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France TI - The runaway black hole GRO J1655-40 AB - We have used the Hubble Space Telescope to measure the motion in the sky and compute the galactocentric orbit of the black hole X-ray binary GRO J1655-40. The system moves with a runaway space velocity of 112 +/- 18 km s(-1) in a highly eccentric (e = 0.34 +/- 0.05) orbit. The black hole was formed in the disk at a distance greater than 3 kpc from the Galactic centre and must have been shot to such an eccentric orbit by the explosion of the progenitor star. The runaway linear momentum and kinetic energy of this black hole binary are comparable to those of solitary neutron stars and millisecond pulsars. GRO J1655-40 is the first black hole for which there is evidence for a runaway motion imparted by a natal kick in a supernova explosion MH - Argentina MH - France MH - Germany MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000179291000029 L2 - stars : individual : GRO J1655-40;black hole physics;X-rays : binaries;astrometry;SUPERLUMINAL SOURCE; RELATIVISTIC JETS; LIGHT-CURVE; LMC X-3; GALAXY; QUIESCENCE; VELOCITIES; HALO; MASS SO - Astronomy & Astrophysics 2002 ;395(2):595-599 6174 UI - 10334 AU - Miramontes O AU - Luque B AD - Univ Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, MexicoUniv Complutense Madrid, Fac Quim, Grp Biofis, Dept Bioquim, Madrid 28040, SpainMiramontes, O, Univ Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Cd Univ,Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Dynamical small-world behavior in an epidemical model of mobile individuals AB - Preliminary results in a simple model of disease spreading within a population of socially interacting mobile individuals are discussed. It is shown that when the traveling path of random walkers is varied from the local neighborhood to possible long-distance, a small-world effect appears affecting the percolation density that separates the endemic state from the disease-free state. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000177751200037 L2 - small world networks;epidemics;mobile automata;MOVING INDIVIDUALS; NETWORKS; SPREAD SO - Physica D-Nonlinear Phenomena 2002 ;168():379-385 6175 UI - 10829 AU - Miramontes O AU - Rohani P AD - Univ Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, MexicoUniv Cambridge, Dept Zool, Cambridge CB2 3EJ, EnglandUniv Georgia, Inst Ecol, Athens, GA 30602, USAMiramontes, O, Univ Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, Mexico TI - Estimating 1/f(alpha) scaling exponents from short time-series AB - In recent years, there has been a concerted effort to develop methods for estimating the scaling exponents of time-series data, thus permitting a characterisation of their underlying dynamical behaviour. This task becomes rather inaccurate with data of limited length (less than 100 points), as is the case in many real studies where observation time is constrained. In this paper, we explore a novel method for accurately calculating the scaling exponents of short-term data, using what we term the multiple segmenting method (MSM). This approach relies on maximising the available information within a time-series by generating pseudo-replicates. We believe this method is potentially useful, especially when applied to biological data. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000176390900002 L2 - noise;noise parameter estimation;1/f;coloured noise;time-series;POPULATION-MODELS; NOISE SO - Physica D-Nonlinear Phenomena 2002 ;166(3-4):147-154 6176 UI - 10882 AU - Miranda E AU - Reyes CJ AD - Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305, USACEN, APRED, Natl Ctr Disaster Prevent, Mexico City 04360, DF, MexicoMiranda, E, Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA TI - Approximate lateral drift demands in multistory buildings with nonuniform stiffness AB - An approximate method is presented to estimate the maximum lateral drift demands in multistory buildings with nonuniform lateral stiffness responding primarily in the fundamental mode when subjected to earthquake ground motions. The method is aimed at the estimation of the maximum roof displacement and of the maximum interstory drift ratio for a given response spectrum. A simplified model of the multistory building is used based on an equivalent continuum structure with nonuniform lateral stiffness distribution consisting of a combination of a flexural cantilever beam and a shear cantilever beam. The effect of the type and amount of reduction in lateral stiffness along the height of the building and of the ratio of overall flexural and shear deformations on the ratio of the spectral displacement to the roof displacement and on the ratio of the maximum interstory drift ratio to the roof drift ratio is investigated. It is shown that reductions in lateral stiffness along the height have a negligible effect on the ratio of spectral displacement to maximum roof displacement and only a small effect on the ratio of maximum interstory drift ratio to roof drift ratio, The use of the method is exemplified with a ten-story steel moment-resisting frame building with nonuniform lateral stiffness. Results computed with the simplified method are compared with those computed using linear and nonlinear time history analyses. It is shown that the method provides good approximations that are adequate for the preliminary design of new buildings or for a rapid evaluation of existing buildings MH - USA MH - Mexico|Distrito Federal PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 10 U4 - Construction & Building Technology;Engineering, Civil U5 - J;Article AV - English IS - 0733-9445 UR - ISI:000176345000002 L2 - drift;buildings, multistory;stiffness;seismic design;roofs;SEISMIC DESIGN; METHODOLOGY SO - Journal of Structural Engineering-Asce 2002 ;128(7):840-849 6177 UI - 11111 AU - Miranda J AU - Romo-Kroger C AU - Lugo-Licona M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Tarapaca, Arica, ChileMiranda, J, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Effect of atomic parameters on L-shell X-ray production cross-sections by proton impact with energies below 1 MeV AB - The role of the atomic parameters involved in the calculation of L-shell X-ray production cross-sections due to the impact of protons with energies below I MeV is discussed. Three data sets of emission rates and two tables of fluorescence yields and Coster-Kronig probabilities are compared. based on the whole body of published experimental measurements of L X-ray lines and theoretical predictions of the ECPSSR model. It is found that one specific set of emission rates together with one specific set of fluorescence yields and Coster-Kronig factors provide the best results for X-ray lines involving L-2 and L-3 subshell transitions. For lines based on L-1 subshell transitions, however, that set of emission rates is not the best to predict the cross-sections. It is noted, however, that more reliable measurements of Coster-Kronig probabilities are necessary, in spite of the availability of refined experimental methods. (C) 2002 Elsevier Science B.V. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000175595500005 L2 - x-ray emission;fluorescence yields;emission rates;Coster-Kronig probabilities;KRONIG TRANSITION-PROBABILITY; SUBSHELL FLUORESCENCE YIELDS; COSTER-KRONIG; SYNCHROTRON RADIATION; EMISSION RATES; FOCK VALUES; IONIZATION; ELEMENTS; PB; BI SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2002 ;189():21-26 6178 UI - 9383 AU - Mireles F AU - Kirczenow G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSimon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, CanadaMireles, F, UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Coherent spin-valve phenomena and electrical spin injection in ferromagnetic/semiconductor/ferromagnetic junctions AB - Coherent quantum transport in ferromagnetic/semiconductor/ferromagnetic junctions is studied theoretically within the Landauer framework of ballistic transport. We show that quantum coherence can have unexpected implications for spin injection and that some intuitive spintronic concepts which are founded in semiclassical physics no longer apply: A quantum spin-valve (QSV) effect occurs even in the absence of a net spin polarized current flowing through the device, unlike in the classical regime. The converse effect also arises, i.e., a zero spin-valve signal for a nonvanishing spin current. We introduce criteria useful for analyzing quantum and classical spin-transport phenomena and the relationships between them. The effects on QSV behavior of spin-dependent electron transmission at the interfaces, interface Schottky barriers, Rashba spin-orbit coupling, and temperature, are systematically investigated. While the signature of the QSV is found to be sensitive to temperature, interestingly, that of its converse is not. We argue that the QSV phenomenon can have important implications for the interpretation of spin injection in quantum spintronic experiments with spin-valve geometries MH - Canada MH - Mexico|Baja California PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000180318800070 L2 - FERROMAGNET-SEMICONDUCTOR INTERFACE; POLARIZED TRANSPORT; ORBIT INTERACTION; QUANTUM-WELLS; GAS; TRANSMISSION; MAGNETORESISTANCE; HETEROSTRUCTURE; TRANSISTOR; CONTACTS SO - Physical Review B 2002 ;66(21): 6179 UI - 10762 AU - Mireles F AU - Kirczenow G AD - Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, CanadaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoMireles, F, Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada TI - From classical to quantum spintronics: Theory of coherent spin injection and spin valve phenomena AB - We present a theory of coherent quantum transport in ferromagnetic/ nonmagnetic/ ferromagnetic heterojunctions. We predict quantum coherence to give rise to a quantum spin valve effect that, unlike its familiar classical analog, occurs even in the absence of a net spin current through the heterostructure. Thus the relationship between spin and charge transport is qualitatively different in the presence of quantum interference than in the (semi-) classical regime. This has important implications for the design of quantum coherent spintronic devices and the interpretation of experiments MH - Canada MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 25 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000176740700017 L2 - FERROMAGNET-SEMICONDUCTOR INTERFACE; 2-DIMENSIONAL ELECTRON-GAS; ORBIT INTERACTION; MAGNETORESISTANCE; TRANSPORT; DEVICE; HETEROSTRUCTURE; TRANSISTOR; RESISTANCE; CONTACTS SO - Europhysics Letters 2002 ;59(1):107-113 6180 UI - 10391 AU - Mireles J AU - Lewis FL AU - Gurel A AD - UACJ, Inst Ingn & Tecnol, Juarez 31310, MexicoUTA, ARRI, Ft Worth, TX 76118, USAEastern Mediterranean Univ, Dept Elect & Elect Engn, Gazi Margosa Mersin 10, TurkeyMireles, J, UACJ, Inst Ingn & Tecnol, Ave Charro 610 Nte, Juarez 31310, Mexico TI - Deadlock avoidance for manufacturing multipart re-entrant flow lines using a matrix-based discrete event controller AB - A deadlock avoidance supervisory controller for Discrete Event (DE) Systems is implemented. The DE controller uses a novel rule-based matrix dispatching formulation (US patent received). This matrix formulation makes it easy to write down the DE controller from standard manufacturing tools such as the bill of materials or the assembly tree. It is shown that the DE controller's matrix form equations plus the Petri Net (PN) marking transition equation provide a complete dynamical description of DE systems. We provide circular wait analysis (CW) for deadlock-free dispatching rules for Multipart Re-entrant Flow line (MRF) regular systems, and provide a regularity test for these systems in PN and matrix notations. We analyse the so-called critical siphons, and certain critical subsystems to develop a DE controller that guaranties deadlock-free dispatching by limiting the work-in-progress in the critical subsystems associated with each CW. This least-restrictive dispatching policy avoids deadlock. The deadlock-free dispatching rules are implemented by the DE controller on a three-robot, two-machine re-entrant flow line, the Intelligent Material Handling cell at the Automation and Robotics Research Institute of UTA. Technical information given includes the development of the deadlock-free controller in LabVIEW MH - Mexico|Distrito Federal MH - Turkey MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Industrial;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7543 UR - ISI:000177609100009 L2 - SYSTEMS; POLICY; NETS SO - International Journal of Production Research 2002 ;40(13):3139-3166 6181 UI - 10077 AU - Mironov SV AU - Perez TM AD - Russian Acad Sci, Inst Zool, St Petersburg 199034, RussiaUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoMironov, SV, Russian Acad Sci, Inst Zool, Univ Skaya Embankment 1, St Petersburg 199034, Russia TI - Two new feather mites (Astigmata, Analgoidea) from ground finches of the genus Geospiza AB - Two new feather mite species are described from ground finches of the genus Geospiza (Passeriformes, Emberizidae) collected on Galapagos Islands, Ecuador. Mesalgoides (s. str.) geospizae sp. nov. (Psoroptoididae) is found on Geospiza scandens (type host), G. fortis, G. fuliginosa, and G. conirostris; Xolalgoides palmai sp. nov. (Xolalgidae) is found on G. scandens (type host), G. fortis, and G. fuliginosa MH - Mexico|Distrito Federal MH - Russia PB - WARSAW: WITOLD STEFANSKI INST PARASITOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Parasitology U5 - J;Article AV - English IS - 1230-2821 UR - ISI:000178557900007 L2 - feather mites;Analgoidea;Astigmata;systematics;new species;birds;Geospiza SO - Acta Parasitologica 2002 ;47(3):228-234 6182 UI - 11595 AU - Miyake H AU - Watanabe M AU - Takemura M AU - Hasegawa T AU - Kojima Y AU - Inoue MB AU - Inoue M AU - Fernando Q AD - Univ Arizona, Dept Chem, Tucson, AZ 85721, USAOsaka City Univ, Grad Sch Sci, Dept Chem, Sumiyoshi Ku, Osaka 5588585, JapanUniv Sonora, CIPM, Hermosillo 83000, Sonora, MexicoMiyake, H, Univ Arizona, Dept Chem, Tucson, AZ 85721, USA TI - Novel optically-active bis(amino acid) ligands and their complexation with gadolinium AB - A condensation reaction of glyoxal with (S)-histidine and (S)-aspartic acid yielded a new optically-active bis(amino acid) ligand, N-[(S)-1-carboxy-2-(imidazol-4-yl)ethyl]-N'-[(S)-1,2-dicarboxyethyl]ethy lenediamine. Two bis(amino acid) ligands with picolyl (pyridylmethyl) groups were synthesized by condensation reactions of glyoxal with the picolyl derivative of (S)-histidine and that of (S)-aspartic acid: the obtained ligands are N,N'-bis(2-pyridylmethyl)-N-[(S)-1-carboxy-2-(imidazol-4-yl)ethyl]-N'-[( S)-1,2-dicarboxyethyl]ethylenediamine and N,N'-bis(2-pyridylmethyl)-N, N'-bis[(S)-1-carboxy-2-(imidazol-4-yl) ethyl]ethylenediamine. The protonation constants of these ligands were determined by potentiometry, and the corresponding protonation sites were located on the basis of H-1 NMR spectra obtained at different pD values. The formation constants of the Gd3+ complexes were determined by potentiometric titrations, and the NMR relaxivities r(1) and r(2) by the measurements of the NMR relaxation times MH - Japan MH - Mexico|Sonora MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000174433000047 L2 - CONTRAST AGENT; METAL-COMPLEXES; CHELATE; NMR; MRI; MACROCYCLES; CONSTANTS; H-1-NMR; DTPA SO - Journal of the Chemical Society-Dalton Transactions 2002 ;(6):1119-1125 6183 UI - 11008 AU - Miyoshi A AU - Poquet I AU - Azevedo V AU - Commissaire J AU - Bermudez-Humaran L AU - Domakova E AU - Le Loir Y AU - Oliveira SC AU - Gruss A AU - Langella P AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceUniv Fed Minas Gerais, Inst Biol Sci, Belo Horizonte, MG, BrazilUniv Autonoma Nuevo Leon, Lab Inmunol & Virol, Fac Ciencias Biol, San Nicolas De Los Garza, Neuvo Leon, MexicoLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - Controlled production of stable heterologous proteins in Lactococcus lactis AB - The use of Lactococcus lactis (the most extensively characterized lactic acid bacterium) as a delivery organism for heterologous proteins is, in some cases, limited by low production levels and poor-quality products due to surface proteolysis. In this study, we combined in one L. lactis strain use of the nisin-inducible promoter P-nisA and inactivation of the extracellular housekeeping protease HtrA. The ability of the mutant strain, designated htrA-NZ9000, to produce high levels of stable proteins was confirmed by using the staphylococcal nuclease (Nuc) and the following four heterologous proteins fused or not fused to Nuc that were initially unstable in wild-type L. lactis strains: (i) Staphylococcus hyicus lipase, (ii) the bovine rotavirus antigen nonstructural protein 4, (iii) human papillomavirus antigen E7, and (iv) Brucella abortus antigen L7/L12. In all cases, protein degradation was significantly lower in strain htrA-NZ9000, demonstrating the usefulness of this strain for stable heterologous protein production MH - Brazil MH - France MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 29 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000176030100068 L2 - CONTROLLED GENE-EXPRESSION; STAPHYLOCOCCUS-HYICUS LIPASE; GRAM-POSITIVE BACTERIA; ACID BACTERIA; ESCHERICHIA-COLI; SUBSP LACTIS; SECRETION; HTRA; PROTEASE; SYSTEMS SO - Applied and Environmental Microbiology 2002 ;68(6):3141-3146 6184 UI - 8933 AU - Mock C AU - Rissa CA AU - Perez RT AU - Saavedra VA AU - Zozaya JE AU - Solis RG AU - Simpson K AU - Torre MH AD - Univ Washington, Harborview Med Ctr, Harborview Injury Prevent & Res Ctr, Seattle, WA 98104, USAHosp San Jose, Sch Med, Inst Tecnol & Estudios Super Monterrey, Monterrey, NL, MexicoHosp 21, Inst Mexicano Seguro Social, Monterrey, NL, MexicoMock, C, Univ Washington, Harborview Med Ctr, Harborview Injury Prevent & Res Ctr, Box 359960,325 9th Ave, Seattle, WA 98104 USA TI - Childhood injury prevention practices by parents in Mexico AB - Objective: Scientifically based injury prevention efforts have not been widely implemented in Latin America. This study was undertaken to evaluate the baseline knowledge and practices of childhood safety on the part of parents in Monterrey, Mexico and in so doing provide information on which to base subsequent injury prevention efforts. Methods: Interviews were carried out with parents from three socioeconomic strata (upper, middle, lower). Questionnaires were based on Spanish language materials developed by The Injury Prevention Program (TIPP) of the American Academy of Pediatrics. Results: Data were obtained from parents of 1123 children. Overall safety scores (percent safe responses) increased with increasing socioeconomic status. The differences among the socioeconomic groups were most pronounced for transportation and less pronounced for household and recreational safety. The differences were most notable for activities that required a safety related device such as a car seat, seat belt, helmet, or smoke detector. Appropriate use of such devices declined from 47% (upper socioeconomic group) to 25% (middle) to 15% (lower). Conclusions: Considerable differences in the knowledge and especially the practice of childhood safety exist among parents in different socioeconomic levels in Mexico. Future injury prevention efforts need to address these and especially the availability, cost, and utilization of specific highly effective safety devices MH - Mexico|Nuevo Leon MH - USA PB - SAN FRANCISCO: B M J PUBLISHING INC RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1353-8047 UR - ISI:000181498000012 L2 - CITY SO - Injury Prevention 2002 ;8(4):303-305 6185 UI - 10297 AU - Mohapatra RN AU - Perez-Lorenzana A AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAInt Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Left-right symmetry in 5D and neutrino mass in TeV-scale gravity models AB - We construct a left-right symmetric model based on the gauge group SU(2)(L)xSU(2)(R)xU(1)(B-L) in five dimensions where both the gauge bosons and fermions reside in all five dimensions. The orbifold boundary conditions are used not only to break the gauge symmetry down to SU(2)(L)xU(1)(Y)xU(1)(Y)(') but also to "project" the right handed neutrino out of the zero mode part of the spectrum, providing a new way to understand the small neutrino masses without adding (singlet) bulk neutrinos. This formulation of the left-right model also has two new features: (i) it avoids most existing phenomenological bounds on the scale of the right handed W-R boson allowing for the possibility that the right handed gauge bosons could have masses under a TeV, and (ii) it predicts a stable lepton with mass of order of the inverse radius of the fifth dimension MH - Italy MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177873600067 L2 - LARGE EXTRA DIMENSIONS; PROTON STABILITY; QUANTUM-GRAVITY; GAUGE-SYMMETRY; CP VIOLATION; STRONG P; B-L; CONSTRAINTS; B->S-GAMMA; SU(2)LXSU(2)RXU(1) SO - Physical Review D 2002 ;66(3): 6186 UI - 10144 AU - Mohar A AU - Ley C AU - Guarner J AU - Herrera-Goepfert R AU - Figueroa LS AU - Halperin D AU - Parsonnet J AD - Inst Nacl Cancerol, Direcc Invest, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoStanford Univ, Sch Med, Stanford, CA 94305, USACtr Dis Control & Prevent, Atlanta, GA, USAEl Colegio Frontera Sur, Chiapas, MexicoMohar, A, Inst Nacl Cancerol, Direcc Invest, Ave San Fernando 22, Mexico City 14000, DF, Mexico TI - Eradication rate of Helicobacter pylori in a Mexican population at high risk for gastric cancer and use of serology to assess cure AB - OBJECTIVES: Helicobacter pylori causes gastric adenocarcinoma. We assessed the success of H. pylori eradication therapy in a medically underserved population in Chiapas, Mexico, that is at high risk for gastric cancer risk. METHODS: Healthy volunteers with both antibodies to CagA and gastrin levels greater than or equal to25 ng/ml were randomly assigned to receive either a combination of omeprazole, amoxicillin, and clarithromycin or matched placebo for 1 wk. Endoscopy with seven biopsies was performed at baseline, at 6 wk, and 1 yr after treatment. Treatment success was defined as loss of H. pylori by histological analysis. Cure was assessed using change in serology based on the standardized absorbance of a H. pylori ELISA. RESULTS: H. pylori eradication rates were high (intent-to-treat analysis: 76.3% [95% CI = 68.7-84.0%] after 6 wk and 76.1% [95% Cl = 67.7-84.6%] after 1 yr; per protocol analysis: 77.8% [95% Cl = 70.1-85.4%] after 6 wk and 75.2% [95% Cl = 66.5-84.0%] after 1 yr). Nine subjects on active treatment and one subject on placebo who were without H. pylori at 6 wk were infected at I yr (recurrence rates 10.7% and 33.3%, respectively, p = 0.31). Median changes in standardized absorbance at 1 yr were 47% and 1% for successfully and unsuccessfully treated patients, respectively. A 10% decline in standardized absorbance after 1 yr had 84% sensitivity and 100% specificity for H. pylori eradication. CONCLUSIONS: Even with a short course of treatment against H. pylori, a high rate of eradication rate can be achieved in populations at high risk for stomach cancer. Serum antibodies are useful in assessing efficacy of therapy MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0002-9270 UR - ISI:000178504800009 L2 - TERM FOLLOW-UP; INFECTION; THERAPY; CHIAPAS; STRAINS; CAGA SO - American Journal of Gastroenterology 2002 ;97(10):2530-2535 6187 UI - 10641 AU - Moises-Alfaro CB AU - Caceres-Rios HW AU - Rueda M AU - Velazquez-Acosta A AU - Ruiz-Maldonado R AD - Natl Inst Pediat, Dept Dermatol, SS Serv Dermatol, Mexico City 04530, DF, MexicoInst Child Hlth, Dept Dermatol, Lima, PeruRuiz-Maldonado, R, Natl Inst Pediat, Dept Dermatol, SS Serv Dermatol, Insurgentes Sur 3700-C, Mexico City 04530, DF, Mexico TI - Are infantile seborrheic and atopic dermatitis clinical variants of the same disease? AB - Background The relationship between infantile seborrheic dermatitis (ISD) and infantile atopic dermatitis (AD) is controversial. Methods Ninety-six children aged 2-12 months diagnosed with atopic dermatitis and a comparable control group of healthy children were evaluated. Demographic data, personal history of ISD and personal or family history of atopy was considered in both groups. Results A personal history of ISD was found in 49% of AD cases and in 17% of controls (P < 0.05). Conclusions Our result and those of the literature do not demonstrate a relationship between ISD and IAD. However, a number of cases of AD have an ISD-like clinical picture. It is probable that ISD is a syndrome and not a disease MH - Mexico|Distrito Federal MH - Peru PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Dermatology U5 - J;Article AV - English IS - 0011-9059 UR - ISI:000176662700009 L2 - CRITERIA SO - International Journal of Dermatology 2002 ;41(6):349-351 6188 UI - 9708 AU - Molina-Aja A AU - Garcia-Gasca A AU - breu-Grobois A AU - Bolan-Mejia C AU - Roque A AU - Gomez-Gil B AD - CIAD, Mazatlan Unit Aquaculture, Mazatlan 82000, Sinaloa, MexicoUNAM, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoGomez-Gil, B, State Univ Ghent, Microbiol Lab, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - Plasmid profiling and antibiotic resistance of Vibrio strains isolated from cultured penaeid shrimp AB - Resistance to different antibiotics was found in 26 of the 30 strains analyzed, more than 70% of the strains analyzed were resistant to carbenicillin and ampicillin and a significant correlation was found between the resistance to both antibiotics. Plasmids were found in 80% of the strains analyzed, and 11 different plasmid profiles were observed. The most common profile obtained had only a 21.2-kbp plasmid, a significant correlation was found between the presence of this plasmid and resistance to carbenicillin, although some exceptions could be detected. Plasmids were cured from a cephalothin resistant strain and reintroduced into the plasmid-free cell and into Escherichia coli kDH5alpha, both strains gained resistance to this antibiotic. (C) 2002 Published by Elsevier Science B.V. on behalf of the Federation of European Microbiological Societies MH - Belgium MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000177219100002 L2 - plasmid profiling;shrimp;antibiotic resistance;Vibrio;DRUG-RESISTANCE; ANGUILLARUM; SEROVAR; AYU SO - Fems Microbiology Letters 2002 ;213(1):7-12 6189 UI - 10207 AU - Molina-Hernandez M AU - Garcia JP AU - Lopez JIO AD - Univ Veracruzana, Inst Invest Psicol, Lab Conducta, Jalapa, Veracruz, MexicoUniv Veracruzana, Direcc Gen Invest, Jalapa, Veracruz, MexicoUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Salud, Izatnagar, Uttar Pradesh, IndiaMolina-Hernandez, M, Univ Veracruzana, Inst Invest Psicol, Lab Conducta, Jalapa, Veracruz, Mexico TI - Female Wistar rats tested during late proestrus or during pregnancy and ovariectomized rats tested after receiving progesterone or allopregnanolone displayed reduced conflict behavior AB - In a conflict test based on the rat's choice between an immediate punished reinforcer or a delayed nonpunished reinforcer, anxiolytic drugs increase the number of immediate punished reinforcers. In this study, two hypotheses were tested: first, during late proestrus or during midpregnancy, female rats will display an elevated amount of immediate punished reinforcers; second, ovariectomized rats will display an elevated amount of immediate punished reinforcers when they receive anxiolytic doses of neurosteroids. Thus, female rats (n = 15) were tested repeatedly during late proestrus, diestrus, and pregnancy in the aforementioned conflict task. They displayed an elevated amount of immediate punished reinforcers during late proestrus (P <.05) and during the 14th (P < .05) and 17th (P < .05) days of pregnancy compared to diestrus or 3rd, 7th, or 20th days of pregnancy. Likewise, ovariectomized rats (n = 90) displayed an elevated amount of immediate punished reinforcers compared to control rats only when they received anxiolytic doses of progesterone (1.0-2.0 mg/kg, P < .05) or allopregnanolone (1.0-2.0 mg/kg, P < .05). In conclusion, female rats displayed reduced conflict behavior during late proestrus and pregnancy, or after received anxiolytic doses of neurosteroids. (C) 2002 Elsevier Science Inc. All rights reserved MH - India MH - Mexico|Veracruz PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Clinical Neurology;Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Review AV - English IS - 0278-5846 UR - ISI:000178043300004 L2 - conflict behavior;estrous cycle;neurosteroids;pregnancy;NEUROACTIVE STEROID PREGNANOLONE; GABA(A) RECEPTOR FUNCTION; MAJOR DEPRESSION; NEUROSTEROID ALLOPREGNANOLONE; GONADAL-STEROIDS; BURYING BEHAVIOR; OVARIAN HORMONES; PANIC DISORDER; ESTROUS-CYCLE; A RECEPTOR SO - Progress in Neuro-Psychopharmacology & Biological Psychiatry 2002 ;26(5):839-844 6190 UI - 11340 AU - Molina A AU - Bell R AD - ITESM, Ctr Sist Integrados Manufactura, Monterrey 64849, MexicoLoughborough Univ Technol, Dept Mfg Engn, Loughborough LE11 3TU, Leics, EnglandMolina, A, ITESM, Ctr Sist Integrados Manufactura, Ave Eugenio Garza Sada 2501, Monterrey 64849, Mexico TI - Reference models for the computer aided support of simultaneous engineering AB - The results of research carried out in the world of reference models to assist in the selection of the model(s) that best set the context and basis for the definition of a reference model for the computer aided support of simultaneous engineering are presented. The reference models employed are the Open System Architecture for Computer Integrated Manufacturing (CIMOSA) and the Reference Model for Open Distributed Processing (RM-ODP). The CIMOSA model is appropriate because it enables us to set the context and requirements for CAE systems within an integrated enterprise. The RM-ODP allows the definition of the structure and characteristic of the CAE systems in terms of five different views (enterprise, information, computational, engineering and technology). The result of the research is a CAE framework targeted to assist in the system specification, development and integration of future computer-based systems that support Simultaneous Engineering. A case study is presented to demonstrate the use of the CAE framework MH - United Kingdom MH - Mexico|Nuevo Leon PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Interdisciplinary Applications;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0951-192X UR - ISI:000175075200001 SO - International Journal of Computer Integrated Manufacturing 2002 ;15(3):193-213 6191 UI - 11178 AU - Molinari S AU - Testi L AU - Rodriguez LF AU - Zhang QZ AD - Ist Fis Spazio Interplanetario, CNR, I-00133 Rome, ItalyOsserv Astrofis Arcetri, I-50125 Florence, ItalyUNAM, Inst Astron, Morelia 58190, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAMolinari, S, CALTECH, Ctr Infrared Proc & Anal, MS 100-22, Pasadena, CA 91125 USA TI - The formation of massive stars. I. High-resolution millimeter and radio studies of high-mass protostellar candidates AB - We used the Owens Valley Millimeter Array and the Very Large Array to obtain interferometric maps at millimeter and centimeter wavelengths in both the continuum and various lines [HCO+ (1-0), (HCO+)-C-13 (1-0), SiO (v = 0, J = 2-1) and (HCN)-C-13(1-0)] toward a sample of 11 high-mass protostellar candidates. These sources are known from a previous study to be associated with dense gas and dust and to not be associated with H II regions. All 11 sources were detected in HCO+ (1-0), nine in the millimeter continuum and five (of eight observed) in the centimeter continuum. The derived physical parameters confirm the high-mass nature of these molecular clumps and suggest they are gravitationally bound. Molecular outflows were detected toward six sources, with flow masses and momenta much higher than in low-mass young stellar objects. In many of the sources the molecular emission is organized in substructures, resolved both spatially and in velocity. We find that the sources may be characterized by their degree of fragmentation, turbulence, and outflow activity, with the sample dividing into two groups: group 1 cores have multiple peaks but with a clearly dominant component and larger line widths and are systematically associated with outflows, while group 2 cores have several comparable subentities, smaller line widths, and no association with outflows. We speculate that more massive cores may form from smaller cores via coalescence or competitive accretion. Even conservative estimates of outflow mass-loss rates, however, indicate that accretion is the dominant process in the later formation of massive protostars from such cores. We find a flattening of the outflow mass spectra with increasing flow velocities, at variance with previous studies that suggest a steepening with increasing flow velocities. In the light of this result we suggest a reevaluation of the wide-angle wind momentum-driven flow models to describe the acceleration of outflows in the earliest stages of massive star formation MH - USA MH - Italy MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 30 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175527100025 L2 - ISM : jets and outflows;ISM : molecules;radio continuum : ISM;stars : formation;submillimeter;MAGNETOCENTRIFUGALLY DRIVEN FLOWS; ULTRACOMPACT HII-REGIONS; LUMINOUS IRAS SOURCES; YOUNG STELLAR OBJECTS; MOLECULAR OUTFLOWS; HYDRODYNAMIC SIMULATIONS; BIPOLAR OUTFLOWS; JET-DRIVEN; SEARCH; SAMPLE SO - Astrophysical Journal 2002 ;570(2):758-778 6192 UI - 9741 AU - Moncho-Jorda A AU - Martinez-Lopez F AU - Gonzalez AE AU - Hidalgo-Alvarez R AD - Univ Granada, Biocolloid & Fluid Phys Grp, Dept Appl Phys, E-18071 Granada, SpainNatl Autonomous Univ Mexico, Ctr Phys Sci, Cuernavaca 62251, Morelos, MexicoHidalgo-Alvarez, R, Univ Granada, Biocolloid & Fluid Phys Grp, Dept Appl Phys, E-18071 Granada, Spain TI - Role of long-range repulsive interactions in two-dimensional colloidal aggregation: Experiments and simulations AB - A theoretical model for the interaction between colloidal particles trapped at the air-water interface is proposed in order to explain experimental aggregation results. Kinetic and structural aspects of 2D aggregation processes point out the long-range nature of the particle interactions. These interactions have been modeled by means of monopolar and dipolar repulsive forces, which depend on the monopole and dipole surface fractions at the emergent part of the colloidal particles, f(mon) and f(dip), respectively. Brownian dynamics simulations have been used to fit the model to experiment results using the fractal dimension d(f) and the kinetics exponent z as comparative parameters. Simulation results show that dipolar interaction controls aggregation at high subphase salt concentration whereas the monopolar interaction determines aggregation at low salt concentrations. Moreover, results show that f(mon) is the main parameter controlling kinetics in 2D aggregation and, hence, a critical coagulation concentration (CCC) can be defined from the salt concentration at which the monopole fraction becomes zero, f(mon) = 0 MH - Mexico|Morelos MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000179428400012 L2 - AIR-WATER-INTERFACE; 2 DIMENSIONS; MOLECULAR-DYNAMICS; BOUNDARY-LAYER; PARTICLES; MONOLAYERS; SYSTEMS; PHASES; BEADS SO - Langmuir 2002 ;18(24):9183-9191 6193 UI - 9036 AU - Mondie S AU - Dambrine M AU - Santos O AD - CINVESTAV, IPN, Dept Automat Control, Mexico City 07300, DF, MexicoEcole Cent Lille, UPRESA 8021, CNRS, LAIL, Lille, FranceUniv Autonoma Estado Hidalgo, ICBI, Ctr Invest Technol & Sistemas, Pachuca, MexicoMondie, S, CINVESTAV, IPN, Dept Automat Control, AP 14740,Av IPN 2508, Mexico City 07300, DF, Mexico TI - Approximation of control laws with distributed delays: A necessary condition for stability AB - The implementation of control laws with distributed delays that assign the spectrum of unstable linear multivariable systems with delay in the input requires an approximation of the integral. A necessary condition for stability of the closed-loop system is shown to be the stability of the controller itself. An illustrative multivariable example is given MH - France MH - Mexico|Distrito Federal MH - Mexico|Hidalgo PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000181338500004 L2 - FINITE SPECTRUM ASSIGNMENT; SYSTEMS SO - Kybernetika 2002 ;38(5):541-551 6194 UI - 11812 AU - Monje F AU - Pardo LA AU - Sanchez A AU - Camacho J AU - Stuhmer W AD - Max Planck Inst Expt Med, D-37075 Gottingen, GermanyCINVESTAV, Mexico City 14000, DF, Mexico TI - Inactivating properties in human EAG channels MH - Germany MH - Mexico|Distrito Federal PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000173252701128 SO - Biophysical Journal 2002 ;82(1):230A-230A 6195 UI - 10111 AU - Monreal-Puente R AU - Tapia E AU - Santamaria J AU - Rodriguez-Iturbe B AU - Johnson RJ AU - Herrera-Acosta J AU - Franco M AD - INC Ignacio Chavez, Nephrol, Mexico City, DF, MexicoUniv Hosp, INBIOMED, Maracaibo, Zulia, VenezuelaBaylor Coll Med, Houston, TX 77030, USA TI - Angiotensin II (AngII) mediates salt-sensitive hypertension (SSHT) in rats MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757500722 SO - Journal of the American Society of Nephrology 2002 ;13():146A-146A 6196 UI - 9597 AU - Monroy-Guzman F AU - Trubert D AU - Le Naour C AD - ININ, Toluca 52045, MexicoInst Phys Nucl, IN2P3, CNRS, UPS, F-91406 Orsay, FranceMonroy-Guzman, F, ININ, Km 36-5 Carr Mexico Toluca, Toluca 52045, Mexico TI - Adsorption behavior of Zr, Hf, Nb, Ta and Pa on macroporous anion exchanger in NH4SCN/HClO4 and NH4SCN/HF media AB - The possible use of thiocyanate and ammonium thiocyanate-hydrofluoric acid mixtures for quantitative anion exchange separation of zirconium from hafnium and niobium from tantalum and protactinium has been investigated. Distribution coefficients of zirconium(IV), hafnium(IV), niobium(V), tantalum(V) and protactinium(V) on macroporous BIO-RAD AGMP1 resin over a wide range of SCN and SCN/HF concentrations have been determined. The simultaneous presence of these two complexing agents causes a strong decrease of the adsorption phenomena MH - France MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000179811700002 L2 - EXTRACTION; SEPARATION; ELEMENTS SO - Journal of Radioanalytical and Nuclear Chemistry 2002 ;254(3):431-437 6197 UI - 10698 AU - Monsivais G AU - Rodriguez-Ramos R AU - Fernandez-Alvarez L AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUNAM, Inst Ingn, Mexico City 045, DF, MexicoUniv La Habana, Fac Matemat & Computac, Havana 4, CubaCSIC, Inst Ciencia Mat, Madrid, SpainMonsivais, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Resonances of the Stark-Ladder-type in the transmission coefficient of piezocomposites AB - We discuss the existence of Stark Ladder resonances in the structure of the transmission coefficient T associated with the propagation of SH piezoelectric waves in a multilayered piezoelectric medium. The structure of T is analyzed as a function of the angle of incidence theta. For periodic multilayered piezocomposite we obtain a band structure in the curves T-vs-sin(2)theta. However, when we add a linear term in the values of the parameters of the layers, the periodicity is lost, the bands disappear and the curves T-vs-sin(2)theta show a Stark-Ladder structure MH - Cuba MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000176861500039 L2 - Stark-Ladder;piezocomposite;ELECTRIC-FIELD; WAVES; PROPAGATION; CHAINS SO - Ferroelectrics 2002 ;268():653-657 6198 UI - 10410 AU - Monterde J AU - Vallejo JA AD - Univ Valencia, Dept Geometria & Topol, E-46100 Burjassot, SpainCIMAT, Guanajuato, Mexico TI - Poisson brackets of even symplectic forms on the algebra of differential forms AB - Given a symplectic form and a pseudo-Riemannian metric on a manifold, a nondegenerate even Poisson bracket on the algebra of differential forms is defined and its properties are studied. A comparison with the Koszul-Schouten bracket is established MH - Mexico|Guanajuato MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0232-704X UR - ISI:000177676500002 L2 - graded manifolds;Poisson brackets;Koszul-Schouten form SO - Annals of Global Analysis and Geometry 2002 ;22(3):267-289 6199 UI - 9880 AU - Monterrubio T AU - Enkerlin-Hoeflich E AU - Hamilton RB AD - Louisiana State Univ, Sch Renewable Nat Resources, Baton Rouge, LA 70803, USAInst Tecnol & Estud Super Monterrey, Ctr Calidad Ambiental, Monterrey, Nuevo Leon, MexicoMonterrubio, T, Univ Michoacana San Nicolas Hidalgo, Fac Biol, Edificio R Ciudad Univ, Morelia 58040, Michoacan, Mexico TI - Productivity and nesting success of Thick-billed Parrots AB - We studied productivity and nesting success of the Thick-billed Parrot (Rhynchopsina pachyrhyncha) during a 7-year period (1995-2001) in five nesting areas at the Sierra Madre Occidental in Mexico. Two breeding areas continue to be the breeding strongholds for the species. We found 553 cavities with associated pairs and determined the outcome of 187 accessible nests. Of 510 eggs followed, 405 (79%) hatched, and 307 (60%) produced fledglings. Clutch size averaged 2.7 eggs, and mean reproductive output was 1.6 fledglings per egg-laying pair. Overall nest success was 80% and ranged from 88% in 1996 to 60% in 2000. This was higher than nest success of most psittacines, and we consider productivity excellent in remaining areas of good habitat. Nevertheless, the species has nearly disappeared from many areas of its former range that have been converted from old-growth coniferous stands to immature stands deficient in both nest sites and food MH - Mexico|Michoacan MH - Mexico|Nuevo Leon MH - USA PB - LAWRENCE: COOPER ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Ornithology U5 - J;Article AV - English IS - 0010-5422 UR - ISI:000179190400008 L2 - nesting success;pine forest;productivity;Rhynchopsitta pachyrhyncha;Thick-billed Parrot. SO - Condor 2002 ;104(4):788-794 6200 UI - 10703 AU - Montiel-Smith S AU - Cervantes-Mejia V AU - Dubois J AU - Guenard D AU - Gueritte F AU - Sandoval-Ramirez J AD - CNRS, ICSN, F-91190 Gif Sur Yvette, FranceBenemerita Univ Autonoma Puebla, Puebla, MexicoDubois, J, CNRS, ICSN, Ave Terrasse, F-91190 Gif Sur Yvette, France TI - Synthesis of new analogs of the C-13 docetaxel side chain by asymmetric aminohydroxylation AB - The synthesis of six new beta-phenyl isoserines, each bearing an amino or a nitro substituent on the phenyl ring in various positions, is reported. These compounds, analogues of the docetaxel side chain, have been obtained by asymmetric aminohydroxylation of the corresponding cinnamates with excellent regiospecificity and in good enantiomeric excess. (C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002 MH - France MH - Mexico|Puebla PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000176885300003 L2 - asymmetric synthesis;hydroxylation;natural products;taxoids;VICINAL OXYAMINATION; NITROGEN-SOURCE; OLEFINS SO - European Journal of Organic Chemistry 2002 ;(14):2260-2264 6201 UI - 11715 AU - Montiel D AU - Muller J AU - Poire EC AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoLeiden Univ, Inst Lorentz, NL-2300 RA Leiden, NetherlandsPoire, EC, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Morphological instability at the early stages of heteroepitaxial growth on vicinal surfaces AB - We study the strain-induced morphological instability at the submonolayer coverage stage of heteroepitaxial growth on a vicinal substrate with regularly spaced steps. We study the regime in which diffusion along the film edge is the dominant mechanism of transport of matter. We perform a linear stability analysis and determine for which conditions of coverage a flat front is unstable and for which conditions it is stable. We discuss the effect of step energy. Our results predict that when the thin film covers less than one-half of the terraces the flat front is unstable. For very small coverage, the front will spontaneously break into a regular array of islands. We obtain expressions for the aspect ratio, the size and the spacing of the islands forming this array. This opens the possibility of inducing the spontaneous formation of an array of two-dimensional quantum structures with the desired size and spacing by controlling the cutting angle of the vicinal surface and the fraction of the surface covered by the material MH - Mexico|Distrito Federal MH - Netherlands PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Letter AV - English IS - 0953-8984 UR - ISI:000174008100001 L2 - SELF-ORGANIZATION; CRYSTAL-GROWTH; FILMS SO - Journal of Physics-Condensed Matter 2002 ;14(3):L49-L55 6202 UI - 11202 AU - Montoya A AU - Weiss AP AU - Price BH AU - Cassem EH AU - Dougherty DD AU - Nierenberg AA AU - Rauch SL AU - Cosgrove GR AD - Massachusetts Gen Hosp, Dept Neurosurg, Wang ACC 331, Boston, MA 02114, USAMassachusetts Gen Hosp, Dept Neurol, Boston, MA 02114, USAMassachusetts Gen Hosp, Dept Psychiat, Boston, MA 02114, USAMcLean Hosp, Dept Neurol, Belmont, MA 02178, USANatl Inst Neurol & Neurosurg, Dept Neuropsychiat, Mexico City, DF, MexicoCosgrove, GR, Massachusetts Gen Hosp, Dept Neurosurg, Wang ACC 331, 15 Parkman St, Boston, MA 02114 USA TI - Magnetic resonance imaging-guided stereotactic limbic leukotomy for treatment of intractable psychiatric disease AB - OBJECTIVE: To assess the efficacy and complication rates of magnetic resonance imaging-guided stereotactic limbic leukotomy for the treatment of intractable major depressive disorder (MDD) and obsessive-compulsive disorder (OCD). METHODS: We conducted preoperative evaluations and postoperative follow-up assessments of efficacy and complications for 21 patients who underwent limbic leukotomy. Efficacy was based on physician- and patient-rated global assessments of functioning, as well as evaluations using disease-specific rating scales commonly used in studies of MDD and OCD. RESULTS: The mean time from limbic leukotomy to follow-up assessment was 26 months. On the basis of standard outcome measures, 36 to 50% of patients were considered to be treatment responders. Although permanent surgical morbidity was rare, there were reports of postoperative sequelae, including apathy, urinary incontinence, and memory complaints, which occurred in a substantial minority of cases. CONCLUSION: For this cohort of 21 patients with chronic severe MDD or OCD, who had experienced failure with an exhaustive array of previous treatments, limbic leukotomy was associated with substantial benefit for 36 to 50%. This rate is comparable to those of previous studies of limbic system surgery and indicates that limbic leukotomy is a feasible treatment option for severe, treatment-refractory MDD or OCD. Adverse consequences associated with the procedure included affective, cognitive, and visceromotor sequelae, which were generally transient MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 16 U4 - Clinical Neurology;Surgery U5 - J;Article AV - English IS - 0148-396X UR - ISI:000175370100025 L2 - anterior cingulate gyrus;functional neurosurgery;limbic leukotomy;major depression;obsessive-compulsive disorder;psychosurgery;subcaudate tractotomy;OBSESSIVE-COMPULSIVE DISORDER; TERM FOLLOW-UP; CINGULOTOMY; PSYCHOSURGERY SO - Neurosurgery 2002 ;50(5):1043-1049 6203 UI - 9515 AU - Monzon-Bordonaba F AU - Vadillo-Ortega F AU - Feinberg RF AD - Univ Penn, Ctr Res Reprod & Womens Hlth, Dept Obstet & Gynecol, Philadelphia, PA 19104, USAInst Nacl Perinatol, Direcc Invest, Mexico City, DF, MexicoResprod Associates Delaware, Newark, DE, USAYale Univ, Sch Med, Dept Obstet & Gynecol, New Haven, CT 06520, USAMonzon-Bordonaba, F, Univ Pittsburgh, Med Ctr, Div Mol Diagnost, 701 Scaife Hall,3550 Terrace St, Pittsburgh, PA 15213 USA TI - Modulation of trophoblast function by tumor necrosis factor-alpha: A role in pregnancy establishment and maintenance? AB - OBJECTIVE: Trophoblast differentiation is a critical process for successful implantation and establishment of the human placenta. The aim of this study was to characterize the effect of tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) on the expression of markers of trophoblast function and differentiation. STUDY DESIGN: Human cytotrophoblasts were stimulated with 1 and 10 ng/mL recombinant TNF-alpha or IL-6. Cell viability was determined and conditioned culture media was analyzed by gelatin zymography to assess protease secretion and by enzyme-linked immunosorbent assays to measure production of beta-human chorionic gonadotropin and oncofetal fibronectin. RESULTS: TNF-alpha increased secretion of urokinase-type plasminogen activator up to 3-fold of basal unstimulated production. Stimulation of cytotrophoblasts with this cytokine also inhibited beta-human chorionic gonadotropin secretion up to 75%. TNF-alpha did not modify the secretion of matrix metalloproteinase-9 and oncofetal fibronectin. IL-6 had no effect on these trophoblast differentiation markers. CONCLUSION: These results show that TNF-alpha stimulated cytotrophoblasts modulate the expression of differentiation markers, down-regulating the autocrine signals that promote syncytialization, and increasing their invasive capacity through up-regulation of proteases. We suggest that this regulatory mechanism of trophoblast function could play an important role during trophoblast implantation, in pregnancy failure and in the normal and pathologic rupture of fetal membranes MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 13 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000180131200055 L2 - trophoblast;differentiation;tumor necrosis factor-alpha;proteases;urokinase;human chorionic gonadotropin;HUMAN CHORIONIC-GONADOTROPIN; INTERLEUKIN-6 IL-6; HUMAN CYTOTROPHOBLASTS; ONCOFETAL FIBRONECTIN; IN-VITRO; IMPLANTATION; RELEASE; GENE; DIFFERENTIATION; EXPRESSION SO - American Journal of Obstetrics and Gynecology 2002 ;187(6):1574-1580 6204 UI - 10708 AU - Mora-Mendoza JL AU - Chacon-Nava JG AU - Zavala-Olivares G AU - Gonzalez-Nunez MA AU - Turgoose S AD - Inst Mexicano Petr, Grp Corros, Mexico City 07730, DF, MexicoCtr Invest Mat Avanzados SC, Chihuahua 31109, MexicoInst Invest Elect, Col Palmira 62490, Morelos, MexicoUMIST, Ctr Corros & Protect, Manchester M60 1QD, Lancs, EnglandMora-Mendoza, JL, Inst Mexicano Petr, Grp Corros, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Influence of turbulent flow on the localized corrosion process of mild steel with inhibited aqueous carbon dioxide systems AB - Three percent sodium chloride (NaCl) solutions saturated with carbon dioxide (CO2) were used to study the corrosion inhibition of mild steel samples under turbulent flow conditions. The performance of cetyl trimethyl ammonium bromide (CTAB) was tested with three different concentrations (20, 60, and 100 ppm) and three different pH values (3.8, 5. and 6). The rotating cylinder electrode (RCE) was used to test different turbulent flow conditions (1,000 rpm to 5,000 rpm). It was found that the inhibitor performance is a junction of concentration and pH. A localized corrosion process was found on the surface samples and further research was caned out to determine its causes. With the use of cyclic anodic polarization curves and surface examinations, it was demonstrated that the localized corrosion process does not occur at a specific rotation speed. Potentiostatic experiments simulated the effect of shear stress and the instantaneous changes in corrosion potential (E-corr) observed when the rotation speed was increased. The electrochemical measurements and surface examinations showed that changes in E-corr to more positive values are more important in producing the localized process, and removing the electrostatically adsorbed inhibitor from the surface sample, than increases in shear stress MH - United Kingdom MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000176916700007 L2 - carbon dioxide corrosion;electrochemistry;inhibitors;localized corrosion;turbulent flow;ROTATING CYLINDER ELECTRODE SO - Corrosion 2002 ;58(7):608-619 6205 UI - 11526 AU - Mora-Mendoza JL AU - Turgoose S AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUMIST, Ctr Corros & Protect, Manchester M60 1QD, Lancs, EnglandMora-Mendoza, JL, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Fe3C influence on the corrosion rate of mild steel in aqueousCO(2) systems under turbulent flow conditions AB - The corrosion and corrosion inhibition of mild Steel in CO2 saturated solutions were studied under turbulent flow conditions at different pH. Electrochemical measurements using a.c. and d.c. techniques in uninhibited solutions of pH 3.8 indicated the formation of protective surface films (FeCO3) in short immersion times. However, as the exposure time was increased the corrosion rate always increased, an effect attributed to the increased surface area of Fe3C residue from corrosion of the steel. At pH 5.5, the corrosion rate always increased with time, behaviour also associated with the presence of Fe3C surface film. The huge cathodic area of Fe3C seems to have a more important impact on the electrochemical behaviour than the poorly formed FeCO3 products. The effect of Fe3C on inhibition by a quaternary amine inhibitor at pH 3.8 is to increase the corrosion rate as the pre-corrosion time is increased. The Fe3C causes either (a) a cathodic area increase reflected in the corrosion rate increase with time or (b) a potential gradient in the pores of the Fe3C layer that prevents positively charge amine ions from reaching all anodic sites. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000174671900005 L2 - CO2 corrosion;turbulent flow;electrochemical techniques;iron carbide and inhibitors;SATURATED NEUTRAL ELECTROLYTE; CARBON-DIOXIDE SOLUTIONS; IRON ELECTRODE; MECHANISM; BEHAVIOR; MODEL SO - Corrosion Science 2002 ;44(6):1223-1246 6206 UI - 9960 AU - Mora JC AU - Macias JL AU - Saucedo R AU - Orlando A AU - Manetti P AU - Vaselli O AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Florence, Dipartimento Sci Terra, I-50121 Florence, ItalyCNR, CS Minerogenesi & Geochim Appl, I-50121 Florence, ItalyMora, JC, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Petrology of the 1998-2000 products of Volcan de Colima, Mexico AB - The 1998-2000 activity of Volcan de Colima generated a series of lava flows and block-and-ash flows of andesitic composition (59-61% SiO2). Juvenile clasts from both lava flows and pyroclastic deposits contain phenocrysts of plagioclase > two pyroxenes > Fe-Ti oxides and rare amphibole set in a groundmass of the same minerals and rhyolitic glass (74-77% SiO2). Prior to the eruption, the andesitic magma was stored at a temperature of similar to900degreesC based on titanomagnetite-ilmenite equilibrium. The magma had an oxygen fugacity of 10(-11.1), corresponding to 0.8 log units above the NNO oxygen buffer, and water contents in the rhyolitic melt of similar to2 wt%, suggesting that the magma was water-undersaturated at depth. The presence of amphibole with clear signs of disequilibrium, quartz xenocrysts, and plagioclase (An(<50)) as inclusions in pyroxenes and phenocryst cores suggests that the magma chamber was first occupied by an andesitic magma at temperatures < 900degreesC and probably as low as 840degreesC. The presence of plagioclase phenocrysts with reverse zoning (rims, An(>50)) and microphenocrysts (An(>50)) indicate the injection of a new hotter and more mafic andesite into the magma chamber. This process was the main trigger of the 1998-2000 activity. (C) 2002 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000178855900015 L2 - andesitic magma;magma recharge;disequilibrium textures;Volcan de Colima;Mexico;FE-TI OXIDES; PHASE-EQUILIBRIA; COMPLEX SYSTEMS; MAGMA; CONSTRAINTS; ANDESITES; ERUPTION; MG SO - Journal of Volcanology and Geothermal Research 2002 ;117(1-2):195-212 6207 UI - 9999 AU - Moraghan JT AU - Padilla J AU - Etchevers JD AU - Grafton K AU - costa-Gallegos JA AD - N Dakota State Univ, Dept Soil Sci, Fargo, ND 58105, USAN Dakota State Univ, Dept Plant Sci, Fargo, ND 58105, USAColegio Postgrad, Inst Recursos Nat, Montecillo 56230, MexicoINIFAP, Chapingo 56230, MexicoMoraghan, JT, N Dakota State Univ, Dept Soil Sci, Fargo, ND 58105, USA TI - Iron accumulation in seed of common bean AB - The effect of soil and genotype on iron concentration [Fe] in common bean (Phaseolus vulgaris L.) seed was studied in the greenhouse. Liming an acid soil increased soil pH from 6.0 to 7.3 but had no effect on seed [Fe] of three bean genotypes (Voyager, T39, UI911) from the Middle American gene pool in North Dakota. However, liming decreased seed-manganese concentration [Mn]. The influence of FeEDDHA on Fe accumulation in seed of the three bean genotypes, grown on acid (pH=6.0) and naturally calcareous (pH=8.2) soils, was also studied in North Dakota. Seed from the acid soil contained 25% higher [Fe] than seed from the calcareous soil. FeEDDHA increased seed [Fe] only on the calcareous soil, but reduced seed [Mn] on both soils. Voyager seed, characterized by a relatively low [Fe] in the seed coat, had a higher seed [Fe] than the other two genotypes. The hypothesis that high seed [Fe] is characterized by a low seed-coat [Fe] was next investigated. Voyager, T39 and 10 diverse Latin American genotypes from the Middle American gene pool were grown on a soil (pH=7.0) with Andic properties in Mexico in the presence and absence of FeEDTA. FeEDTA increased seed [Fe]. Seed of Voyager and a Mexican genotype (Bayo 400) had the highest seed [Fe]. However, Bayo 400, unlike Voyager, contained a high percentage of its seed Fe in the seed coat. Consequently, a high seed [Fe] genotype does not necessarily have a low seed-coat [Fe]. Both soil and genotype affect Fe accumulation in bean seed MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000178651400004 L2 - bean genotypes;iron chelates;Phaseolus vulgaris;seed iron;seed manganese;soil pH;PHASEOLUS-VULGARIS L; PLANTS; AVAILABILITY; CALCIUM; SOILS; COAT SO - Plant and Soil 2002 ;246(2):175-183 6208 UI - 9872 AU - Morales-Montor J AU - Hallal-Calleros C AU - Romano MC AU - Damian RT AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoCINVESTAV, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoUniv Georgia, Dept Cellular Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30602, USAMorales-Montor, J, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, AP 70228, Mexico City 04510, DF, Mexico TI - Inhibition of P-450 aromatase prevents feminisation and induces protection during cysticercosis AB - Cysticercotic male mice undergo an impressive feminisation process, characterised by 200 times increased serum 17beta-estradiol levels while testosterone and dihydrotestosterone are 90% reduced, which results in elevated parasite burden. Administration of Fadrozole (an aromatase inhibitor) in male and female mice suppressed the production of 17beta-estradiol, accompanied with a 70% reduction in parasite burden. This protective effect was associated in male mice with a recovery of the specific cellular immune response. Interleukin-6 (IL-6) serum levels, and its production by splenocytes, was augmented by 80%, together with a 10-fold increase in its expression in testes of infected male mice. Fadrozole treatment returned these levels to baseline values. Aromatase expression in the testes of infected male mice was not affected by Fadrozole. These results suggest that aromatase and IL-6 are key molecules in the production of the feminisation undergone by infected male mice and to Fadrozole treatment as a possible new therapeutic approach to cysticercosis. (C) 2002 Australian Society for Parasitology Inc. Published by Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Parasitology U5 - J;Article AV - English IS - 0020-7519 UR - ISI:000179073800005 L2 - parasitic helminth;cellular immune response;humoral immune response;interleukin-6;cytokine;immunoendocrine;TH1;TH2;Fadrozole;cysticercosis;feminisation;protection;TAENIA-CRASSICEPS CYSTICERCOSIS; RAT GRANULOSA-CELLS; CYTOCHROME-P450 AROMATASE; REPRODUCTIVE-SYSTEM; IMMUNE-RESPONSE; MALE-MICE; EXPRESSION; INTERLEUKIN-6; HORMONE; FEMINIZATION SO - International Journal for Parasitology 2002 ;32(11):1379-1387 6209 UI - 10101 AU - Morales-Montor J AU - Baig S AU - Kabbani A AU - Damian RT AD - UNAM, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoUniv Georgia, Dept Cellular Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30602, USAMorales-Montor, J, UNAM, Inst Invest Biomed, Dept Inmunol, AP 70228, Mexico City 04510, DF, Mexico TI - Do interleukin-6 and macrophage-migration inhibitory factor play a role during sex-associated susceptibility in murine cysticercosis? AB - In murine Taenia crassiceps cysticercosis, females sustain larger intensities of infection than males. However, during chronic infection, this difference disappears and males show a feminization process. To further study the role of two cytokines, interleukin-6 (IL-6) and macrophage-migration inhibitory factor (MIF), known to be involved in immunoendocrinological processes during sex-associated susceptibility in cysticercosis, IL-6 and MIF gene knockout (KO) mice were infected, and the number of parasites and serum sex-steroid levels were measured. Results show that IL-6 and MIF KO mice of both genders infected with T. crassiceps cysticerei harbor similar numbers of parasites, with no change in sex-hormone levels. However, in wild-type strains, females have twice as many parasites as males. At the same time, there is a decrease of 80% in testosterone and dihydrotestosterone serum levels, and a 100-fold increase in the levels of estradiol in infected male mice. These results suggest a role for both IL-6 and MIF genes in sex-associated susceptibility in murine T. crassiceps cysticercosis MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000178419600005 L2 - TAENIA-CRASSICEPS CYSTICERCOSIS; PARASITIC INFECTION; LEYDIG-CELLS; FEMINIZATION; INVITRO SO - Parasitology Research 2002 ;88(10):901-904 6210 UI - 10582 AU - Morales-Montor J AU - Baig S AU - Hallal-Calleros C AU - Damian RT AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoUniv Georgia, Dept Cellular Biol, Athens, GA 30602, USAMorales-Montor, J, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, AP 70228, Mexico City 04510, DF, Mexico TI - Taenia crassiceps: androgen reconstitution of the host leads to protection during cysticercosis AB - The effects of testosterone, dihydrotestosterone, and 17beta-estradiol in castrated mice of both sexes infected with Taenia crassiceps cysticerci were studied. The results showed that castration and treatment with either testosterone or dihydrotestosterone before infection decreased parasite loads by 50 and 70%, respectively, while the treatment with 17beta-estradiol increased it by three times in both genders, as compared with control mice. The specific splenocyte cell proliferation and IL-2 and IFN-gamma production were depressed in infected castrated mice of both genders, while treatment with testosterone or dihydrotestosterone produced a significant proliferation recovery and enhanced production of IL-2 and IFN-gamma. On the other hand, the humoral response was unaffected with testosterone or dihydrotestosterone restitution, while the treatment with estradiol in both genders augmented the levels of anti-cysticerci IgG, as well as IL-6 and IL-10 production. These results suggest a protective role for androgens, possibly through the stimulation of the specific cellular immunity MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Parasitology U5 - J;Article AV - English IS - 0014-4894 UR - ISI:000177127400001 L2 - Taenia crassiceps;Cestoda;cysticercosis;protection;immunoendocrine;parasite loads;reconstitution;cytokines;TH1;TH2;humoral immunity;cellular immunity;IMMUNE-RESPONSE; SEX-HORMONES; ANTIGENS; SOLIUM; MICE; FEMINIZATION; SYSTEM; RATS SO - Experimental Parasitology 2002 ;100(4):209-216 6211 UI - 10803 AU - Morales-Morales D AU - Cramer RE AU - Jensen CM AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Hawaii Manoa, Dept Chem, Honolulu, HI 96822, USAMorales-Morales, D, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior,Cd Univ, Mexico City 04510, DF, Mexico TI - Enantioselective synthesis of platinum group metal complexes with the chiral PCP pincer ligand R,R-{C6H4-2,6-(CH2P*PhBut)(2)}. The crystal structure of R,R-PdCl{C6H3-2,6-(CH2P*PhBut)(2)} AB - The novel PCP chiral ligand R,R-{C6H4-2,6-(CH2P*PhBut)(2)} and its platinum metal complexes have been easily synthesized in enantiomeric pure form. The palladium compound R,R-PdCl{C6H3-2,6-(CH2P*PhBut)(2)} has been characterized by X-ray crystal structure analysis thus confirming the absolute configuration of the complexated ligand. Preliminary catalytic experiments with the iridium and palladium complexes R,R-IrH4{C6H3-2,6-(CH2P*PhBut)(2)} and R,R-PdCl{C6H3-2,6-(CH2P*PhBut)(2)} in the dehydrogenation of cycloalkanes and in the hydrosilylation of styrene, allylic alkylation and Heck coupling reactions, respectively have been carried out. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 40 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000176474300008 L2 - chiral phosphines;asymmetric catalysis;PCP pincer complexes;ASYMMETRIC ALDOL REACTION; METHYL ISOCYANOACETATE; PHOSPHINE BORANES; DEHYDROGENATION; EFFICIENT; ARYL SO - Journal of Organometallic Chemistry 2002 ;654(1-2):44-50 6212 UI - 11215 AU - Morales-Morales D AU - Rodriguez-Morales S AU - Dilworth JR AU - Sousa-Pedrares A AU - Zheng YF AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Oxford, Inorgan Chem Lab, Oxford OX1 3QR, EnglandMorales-Morales, D, Univ Nacl Autonoma Mexico, Inst Quim, Cd Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - Synthesis of neutral iridium(III) and rhodium(III) complexes with the proligands (Pr2P)-P-i(C6H4-SH-2) [pr(i)PSH](1); PhP(C6H4-SH-2)(2) [phPS(2)H(2)] and PhP(C2H4SH)(2) [ePS(2)H(2)](3). The X-ray crystal structures of [Ir(pr(i)PS)(3)] and [Rh(H)(phPS(2))(CO)(PPh3)] AB - The reactivity of the hybrid phosphorus-sulfur proligands pr(i)PSH, phPS(2)H(2) and ePS(2)H(2) with iridium and rhodium precursors has been explored. By reacting IrCl3 with pr(i)PSH in the presence of NEt3 as base, the octahedral Ir(111) specie [Ir(pr(i)PS)(3)] was obtained and its crystal structure determined. Reactions of the potentially tridentated proligands phPS(2)H(2) and ePS(2)H(2) with trans-[MF(CO)(PPh3)(2)] (M = Rh and Ir) were also investigated. Complexes of general formula [M(H)(phPS(2))(CO)(PPh3)] were obtained with phPS(2)H(2). A single crystal X-ray structure determination for [Rh(H)(PhPS2)(CO)(PPh3)] showed the complex to be octahedral. Reactions with the aliphatic proligand ePS(2)H(2) afforded analogous species to those with phPS(2)H(2). (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000175344600015 L2 - phosphorus-sulfur proligands;rhodium complexes;iridium complexes;hydrides;crystal structures;SULFUR DONOR LIGANDS; MOLECULAR-STRUCTURES; COORDINATION CHEMISTRY; ASYMMETRIC HYDROGENATION; PLATINUM(II) COMPLEXES; PHOSPHINOTHIOL LIGANDS; THIOLATO-COMPLEXES; HYBRID LIGANDS; TRIDENTATE; RHENIUM SO - Inorganica Chimica Acta 2002 ;332():101-107 6213 UI - 11903 AU - Morales-Morales D AU - Redon R AU - Zheng YF AU - Dilworth JR AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Hawaii, Dept Chem, Honolulu, HI 96822, USAUniv Oxford, Inorgan Chem Lab, Oxford OX1 3QR, EnglandMorales-Morales, D, Natl Autonomous Univ Mexico, Inst Quim, Cd Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - Highly efficient and regioselective couplings of aryl halides to olefins catalyzed by a palladium complex with a hybrid phosphorus-sulfur ligand AB - The novel palladium phosphino-thioether P-S chelate complex, [PdCl2{MeSC6H4-2-(CH2PPh2)}] (3) is a highly efficient catalyst for the olefinic coupling of aryl bromo and iodo compounds to olefins under aerobic conditions, leading to more than 10(6) turnovers for the reactions with bromo and iodo benzenes. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000173502200005 L2 - Heck reaction;P-S hybrid ligands;palladium complexes;catalysis;PCP PINCER COMPLEX; HECK REACTION; ASYMMETRIC CATALYSIS; ENANTIOSELECTIVE CATALYSIS; ALLYLIC SUBSTITUTIONS; CATIONIC COMPLEXES; PD COMPLEXES; HYDROGENATION; PALLADACYCLES; RHODIUM(I) SO - Inorganica Chimica Acta 2002 ;328():39-44 6214 UI - 11581 AU - Morales-Peza N AU - Auewarakul P AU - Juarez V AU - Garcia-Carranca A AU - Cid-Arregui A AD - Deutsch Krebsforschungszentrum, D-69120 Heidelberg, GermanyNatl Autonomous Univ Mexico, Inst Biomed Res, Mexico City 04510, DF, MexicoEuropean Mol Biol Lab, D-69012 Heidelberg, GermanyNatl Canc Inst, Div Basic Res, Mexico City 14000, DF, MexicoCid-Arregui, A, Deutsch Krebsforschungszentrum, Neuenheimer Feld 242, D-69120 Heidelberg, Germany TI - In vivo tissue-specific regulation of the human papillomavirus type 18 early promoter by estrogen, progesterone, and their antagonists AB - Human papillomavirus type 18 is a causative agent of epithelial cancers in the uterine cervix. We show here that estrogen and progesterone activate beta-galactosidase expression from the early promoter of this virus in the genital epithelia of transgenic mice. Ovariectomy caused suppression of transgene expression exclusively in vagina and cervix epithelia. beta-Galactosidase expression could be restored in ovariectomized females by administration of estrogen, alone or in combination with progesterone. Further, rescue of transgene expression was inhibited by the estrogen antagonist tamoxifen and the anti-progesterone RU486, suggesting that this was a specific effect. (C) 2002 Elsevier Science (USA) MH - Germany MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Virology U5 - J;Article AV - English IS - 0042-6822 UR - ISI:000174456200013 L2 - oncogenic HPV;LCR;gene expression;estrogen;progesterone;receptor;cervical cancers;tamoxifen;RU486;CERVICAL-CARCINOMA CELLS; TRANSGENIC MICE; RECEPTOR; TRANSCRIPTION; ASSOCIATION; EXPRESSION; REPRESSION; HORMONE; CANCER; REGION SO - Virology 2002 ;294(1):135-140 6215 UI - 10384 AU - Morales J AU - Olayo MG AU - Cruz GJ AU - Olayo R AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoInst Nacl Invest Nucl, Dept Sintesis & Caracterizacion, Mexico City 11801, DF, MexicoUniv Autonoma Estado Mexico, Fac Quim, Posgrad Mat, Chiang Mai 50000, ThailandCruz, GJ, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Synthesis by plasma and characterization of bilayer aniline-pyrrole thin films doped with iodine AB - The synthesis by plasma and characterization of aniline-pyrrole bilayer polymers doped in situ with iodine were studied. The objective was to study the electrical conductivity of thin films composed of alternating layers of different polymers. The results indicated that the plasma technique is capable of forming chemically bonded layered polymers with several possible combinations. The electric conductivity was studied during heating-cooling cycles so the dependence of the bilayer polymers on temperature could be observed. The behavior was related with the Arrhenius model, with average activation energies of 0.4 +/- 0.1 eV in the heating steps and 0.5 +/- 0.1 eV in the cooling steps. The difference in both steps shows the influence of the aniline in the bilayer polymer network because polyaniline presents changes in the structure during heating processes. The bilayer aniline-pyrrole polymers had greater electric conductivity at room temperature than that shown by the separate homopolymers. (C) 2002 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Thailand PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0887-6266 UR - ISI:000177634300008 L2 - polyaniline;polypyrroles;iodine;plasma polymerization;thin films;CONDUCTING POLYMER COMPOSITES; POLYANILINE SO - Journal of Polymer Science Part B-Polymer Physics 2002 ;40(17):1850-1856 6216 UI - 12047 AU - Morales JL AU - Nocedal J AD - Inst Tecnol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, MexicoNorthwestern Univ, ECE Dept, Evanston, IL 60208, USAMorales, JL, Inst Tecnol Autonomo Mexico, Dept Matemat, Rio Hondo 1,Col Tizapan San Angel, Mexico City 01000, DF, Mexico TI - Enriched methods for large-scale unconstrained optimization AB - This paper describes a class of optimization methods that interlace iterations of the limited memory BFGS method (L-BFGS) and a Hessian-free Newton method (HFN) in such a way that the information collected by one type of iteration improves the performance of the other. Curvature information about the objective function is stored in the form of a limited memory matrix, and plays the dual role of preconditioning the inner conjugate gradient iteration in the HFN method and of providing an initial matrix for L-BFGS iterations. The lengths of the L-BFGS and HFN cycles are adjusted dynamically during the course of the optimization. Numerical experiments indicate that the new algorithms are both effective and not sensitive to the choice of parameters MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 0926-6003 UR - ISI:000173207800002 L2 - limited memory method;Hessian-free Newton method;truncated Newton method;L-BFGS;conjugate gradient method;quasi-Newton preconditioning;NEWTON ALGORITHMS; STORAGE SO - Computational Optimization and Applications 2002 ;21(2):143-154 6217 UI - 8470 AU - Moran AL AU - Favela J AU - Martinez-Enriquez AM AU - Decouchant D AD - Lab Logiciel Syst Reseaux, Grenoble, FranceCICESE, Ensenada, Baja California, MexicoCINVESTAV, Dept Ingn Elect, Mexico City 14000, DF, MexicoUABC, Fac Ciencias, Ensenada, Baja California, MexicoMoran, AL, Lab Logiciel Syst Reseaux, Grenoble, France TI - Before getting there: Potential and actual collaboration AB - In this paper we introduce the concepts of Actual and Potential Collaboration Spaces. The former applies to the space where collaborative activities are performed, while the second relates to the initial space where opportunities for collaboration are identified and an initial interaction is established. We present a characterization for Potential Collaboration Spaces featuring awareness elements for the potential of collaboration and mechanisms to gather and present them, as well as mechanisms to establish an initial interaction and associated GUI elements. We argue that by making this distinction explicit, and characterizing Potential Collaboration Spaces, designers of groupware can better identify the technical requirements of their systems and thus provide solutions that more appropriately address their users concerns. We illustrate this concept with the design of an application that supports Potential Collaboration Spaces for the PINAS web-based coauthoring middleware MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000182748200011 L2 - Potential and Actual Collaboration Spaces;potential collaboration awareness;casual and informal interactions;PINAS;Doc2U;SOFTWARE SO - Groupware: Design, Implementation, and Use, Proceedings 2002 ;2440():147-167 6218 UI - 8940 AU - Moran AL AU - Decouchant D AU - Favela J AU - Martinez-Enriquez AM AU - Beltran BG AU - Mendoza S AD - Lab Logiciels Syst Reseaux, Grenoble, FranceCICESE, Ciencias Computac, Ensenada, Baja California, MexicoIPN, CINVESTAV, Dept Ingn Elect, Mexico City, DF, MexicoUABC, Fac Ciencias, Ensenada, Baja California, MexicoMoran, AL, Lab Logiciels Syst Reseaux, Grenoble, France TI - PINAS: Supporting a community of co-authors on the Web AB - To provide efficient support for collaborative writing to a community of authors is a complex and demanding task, members need to communicate, coordinate, and produce in a concerted fashion in order to obtain a final version of the documents that meets overall expectations. In this paper, we present the PINAS middleware, a platform that provides potential and actual collaboration spaces, as well as specific services customized to support collaborative writing on the Web. We start by introducing PINAS Collaborative Spaces and an extended version of Doc2U, the current tool that implements them, that integrate and structure a suite of specialized project and session services. Later, a set of services for the naming, identification, and shared management of authors, documents and resources in a replicated Web architecture is presented. Finally, a three-tier distributed architecture that organizes these services and a final discussion on how they support a community of authors on the Web is presented MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000181619800012 L2 - author community;web collaborative authoring;Doc2U;PICoS SO - Distributed Communities on the Web 2002 ;2468():113-124 6219 UI - 11926 AU - Moran JF AU - Sun ZH AU - Sarath G AU - rredondo-Peter R AU - James EK AU - Becana M AU - Klucas RV AD - Consejo Super Invest Cient, Estac Expt Aula Dei, Dept Nutr Vegetal, Zaragoza 50080, SpainUniv Nebraska, Dept Biochem, Lincoln, NE 68588, USAUniv Autonoma Estado Morelos, Fac Ciencias, Lab Biofis & Biol Mol, Cuernavaca 62210, Morelos, MexicoUniv Dundee, Sch Life Sci, Ctr High Resolut Imaging & Proc, MSI WTB Complex, Dundee DD1 5EH, ScotlandMoran, JF, Consejo Super Invest Cient, Estac Expt Aula Dei, Dept Nutr Vegetal, Zaragoza 50080, Spain TI - Molecular cloning, functional characterization, and subcellular localization of soybean nodule dihydrolipoamide reductase AB - Nodule ferric leghemoglobin reductase (FLbR) and leaf dihydrolipoamide reductase (DLDH) belong to the same family of pyridine nucleotide-disulfide oxidoreductases. We report here the cloning, expression, and characterization of a second protein with FLbR activity, FLbR-2, from soybean (Glycine max) nodules. The cDNA is 1,779 bp in length and codes for a precursor protein comprising a 30-residue mitochondrial transit peptide and a 470-residue mature protein of 50 kD. The derived protein has considerable homology with soybean nodule FLbR-1 (93% identity) and pea (Pisum sativum) leaf mitochondria DLDH (89% identity). The cDNA encoding the mature protein was overexpressed in Escherichia coli. The recombinant enzyme showed K-m and k(cat) values for ferric leghemoglobin that were very similar to those of DLDH. The transcripts of FLbR-2 were more abundant in stems and roots than in nodules and leaves. Immunoblots of nodule fractions revealed that an antibody raised against pea leaf DLDH cross-reacted with recombinant FLbR-2, native FLbR-2 of soybean nodule mitochondria, DLDH from bacteroids, and an unknown protein of approximately 70 kD localized in the nodule cytosol. Immunogold labeling was also observed in the mitochondria, cytosol, and bacteroids of soybean nodules. The similar biochemical, kinetic, and immunological properties, as well as the high amino acid sequence identity and mitochondrial localization, draw us to conclude that FLbR-2 is soybean DLDH MH - Mexico|Morelos MH - United Kingdom MH - Spain MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000173351600033 L2 - FERRIC LEGHEMOGLOBIN REDUCTASE; LEGUME ROOT-NODULES; GLYCINE DECARBOXYLASE; LIPOAMIDE DEHYDROGENASE; GLUTAMINE-SYNTHETASE; TARGETING PEPTIDES; ESCHERICHIA-COLI; PURIFICATION; PROTEIN; EXPRESSION SO - Plant Physiology 2002 ;128(1):300-313 6220 UI - 9725 AU - Moravec F AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Redescription of Perezitrema bychowskyi (Caballero & Caballero, 1975) (Trematoda : Macroderoididae), with remarks on the systematic status of Perezitrema Barus & Moravec, 1996 AB - A description is given of Perezitrema bychowskyi (Caballero & Caballero, 1975) based on newly collected specimens from the intestine of the tropical gar Atractosteus tropicus Gill in the Pantalos de Centla Biological Reserve, State of Tabasco, southeastern Mexico, collected in April 2001, and on a re-examination of the type-specimens. In contrast to the original description, the excretory vesicle of P. bychowskyi was found to be elongate saccular and the intestinal caeca join near the posterior extremity and open via a common median anus. These features, and the presence of a cirrus-sac, were found, using differential interference contrast optics in the type-specimens of P. viguerasi Barus & Moravec, 1967, the type-species of the genus. This made possible a re-diagnosis of Perezitrema Barus & Moravec, 1967. Although P. bychowskyi is very similar to P. viguerasi and their conspecificity cannot be excluded, the poor condition of the type-specimens of the latter does not enable their detailed comparison and, consequently, both are considered independent species for the time being. P. lepisostei (Watson, 1976) is considered a junior synonym of P. bychowskyi. Perezitrema is provisionally placed in the plagiorchioid family Macroderoididae, even though some of its morphological features are similar to those of the lepocreadioid families Enenteridae and Lepocreadiidae MH - Czech Republic MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0165-5752 UR - ISI:000179373200006 L2 - DIGENEA SO - Systematic Parasitology 2002 ;53(3):199-206 6221 UI - 10076 AU - Moravec F AU - Garcia-Magana L AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicUniv Juarez Autonoma Tabasco, Villahelmosa, Tabasco, MexicoNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Spinitectus tabascoensis sp nov (Nematoda, Cystidicolidae) from Ictalurus furcatus (Pisces) in southeastern Mexico AB - A new species of parasitic nematode, Spinitectus tabascoensis sp. nov., is described based on museum specimens recovered from the intestine of the blue catfish Ictalurus furcatus (Valenciennes) from the upper reaches of the Usumacinta River near Tenosique, Tabasco, southeastern Mexico. The new species is characterized mainly by markedly long cuticular spines and their arrangement, the situation of the excretory pore between the 6th and 7th rings of spines, the length of the left spicule (213 mum), and the number and arrangement of caudal papillae in the male. This is the fifth species of Spinitectus reported from freshwater and migratory fishes in Mexico MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Tabasco PB - WARSAW: WITOLD STEFANSKI INST PARASITOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Parasitology U5 - J;Article AV - English IS - 1230-2821 UR - ISI:000178557900006 L2 - parasitic nematode;Spinitectus;fish;Ictalurus;Tabasco;Mexico;FRESH-WATER FISH; N. SP NEMATODA; GENUS SO - Acta Parasitologica 2002 ;47(3):224-227 6222 UI - 10129 AU - Moravec F AU - Salgado-Maldonado G AU - guilar-Aguilar R AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Gibsonnema nom. n., a new name for the nematode genus Paraseuratoides Moravec, Salgado-Maldonado et Aguilar-Aguilar, 2002 MH - Czech Republic MH - Mexico|Distrito Federal PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000178489300006 SO - Folia Parasitologica 2002 ;49(3):217-217 6223 UI - 10695 AU - Moravec F AU - Salgado-Maldonado G AU - guilar-Aguilar R AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoravec, F, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Two new nematodes, Paraseuratoides ophisterni gen. et sp n. (Quimperiidae) and Philometra ophisterni sp n. (Philometridae), from the swamp-eel Ophisternon aenigmaticum in Mexico AB - Two new nematodes, Paraseuratoides ophisterni gen. et sp. n. (Seuratoidea: Quimperiidae) and Philometra ophisterni sp. n. (Dracunculoidea: Philometridae) are described based on specimens recovered from the intestine and mesentery, respectively, of the swamp-eel Ophisternon aenigmaticum Rosen et Greenwood (Synbranchiformes: Synbranchidae) from a canal of the Papaloapan River in Tlacotalpan, State of Veracruz, Mexico. The genus Paraseuratoides is most similar to Paraseuratum Johnston et Mawson, 1940, differing from it mainly in the absence of a bulbous inflation on the anterior end of the oesophagus and in the structure of the mouth (presence of 6 spines in addition to 6 oesophageal teeth). Neoquimperia Wang, Zhao, Wang et Zhang, 1979 and Wuinema Yu et Wang, 1992 are synonymised with Ezonema Boyce, 1971 and Paragendria Baylis, 1939, respectively, and Haplonema hamulatum Moulton, 1931 is considered a junior synonym of Ichthyobronema conoura Gnedina et Savina, 1930. Philometra ophisterni (only females) is mainly characterised by minute cephalic papillae, a greatly developed anterior oesophageal bulb separated from the cylindrical part of the oesophagus, anterior extension of the oesophageal gland anterior to the nerve ring, and by the character of large caudal projections. This is the first Philometra species recorded from inland fishes in Mexico MH - Czech Republic MH - Mexico|Distrito Federal PB - CESKE BUDEJOVICE: FOLIA PARASITOLOGICA RP - NOT IN FILE U3 - TC 9 U4 - Parasitology U5 - J;Article AV - English IS - 0015-5683 UR - ISI:000176921200006 L2 - Nematoda;parasites;Paraseuratoides;Philometra;fish;Ophisternon;Mexico;EPINEPHELUS-MORIO; OCULAR CAVITY; PISCES SO - Folia Parasitologica 2002 ;49(2):109-117 6224 UI - 11951 AU - Moreno A AU - Saridakis E AU - Chayen NE AD - Univ London Imperial Coll Sci Technol & Med, Fac Med, Div Biomed Sci, Biol Struct & Funct Sect, London SW7 2AZ, EnglandUniv Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoChayen, NE, Univ London Imperial Coll Sci Technol & Med, Fac Med, Div Biomed Sci, Biol Struct & Funct Sect, London SW7 2AZ, England TI - Combination of oils and gels for enhancing the growth of protein crystals AB - This note focuses on two different ways of enhancing the use of gels in protein crystallization by applying oils to the trials. Using a five-channel motorized syringe setup, crystals were grown in gelled microbatch drops under oil and compared with those grown under similar conditions in standard microbatch drops. The advantage of this technique over existing gel techniques is that numerous trials can be dispensed automatically, while consuming very small quantities of protein. The application of oil to improve the gel acupuncture technique was also investigated; crystal growth in the presence of an oil barrier was slower than in its absence, giving rise in each case to a single large crystal with no precipitation nor smaller crystals in the capillary MH - United Kingdom MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 7 U4 - Crystallography U5 - J;Article AV - English IS - 0021-8898 UR - ISI:000173441000023 L2 - VAPOR DIFFUSION; CRYSTALLIZATION SO - Journal of Applied Crystallography 2002 ;35():140-142 6225 UI - 9460 AU - Moreno C AU - Nunez D AU - Sarbach O AD - Penn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAMoreno, C, Penn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Kerr-Schild-type initial data for black holes with angular momenta AB - Generalizing previous work we propose how to superpose spinning black holes in a Kerr-Schild initial slice. This superposition satisfies several physically meaningful limits, including the close and the far ones. Further, we consider the close limit of two black holes with opposite angular momenta and explicitly solve the constraint equations in this case. Evolving the resulting initial data with a linear code, we compute the radiated energy as a function of the masses and the angular momenta of the black holes MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000180197300014 L2 - ISOLATED HORIZONS; CLOSE LIMIT SO - Classical and Quantum Gravity 2002 ;19(23):6059-6073 6226 UI - 9969 AU - Moreno C AU - Nunez D AD - Penn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAIPN, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMoreno, C, Penn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Gravitational perturbations of the Kerr black hole due to arbitrary sources AB - We describe the Kerr black hole in the ingoing and outgoing Kerr-Schild horizon penetrating coordinates. Starting from the null vector naturally defined in these coordinates, we construct the null tetrad for each case, as well as the corresponding geometrical quantities allowing us to explicitly derive the field equations for the perturbed scalar projections Psi(0)((1)) and Psi(4)((1)) of the Weyl tensor, including arbitrary source terms. This perturbative description, including arbitrary sources, described in horizon penetrating coordinates is desirable in several lines of research on black holes, and contributes to the implementation of a formalism aimed to study the evolution of the spacetime in the region where two black holes are close together MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000178842700015 L2 - GENERAL-RELATIVITY; EQUATIONS; SYSTEMS SO - International Journal of Modern Physics D 2002 ;11(8):1331-1346 6227 UI - 11065 AU - Morice M AU - Serruys PW AU - Sousa JE AU - Fajadet J AU - Hayashi EB AU - Perin M AU - Colombo A AU - Schuler G AU - Barragan P AU - Guagliumi G AU - Molnar F AU - Falotico R AD - Inst Cardiovasc Paris Sud, Massy, FranceErasmus Univ, Thoraxctr, NL-3000 DR Rotterdam, NetherlandsInst Dante Pazzanese Cardiol, Sao Paulo, BrazilClin Pasteur, Toulouse, FranceInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoUniv Sao Paulo, Inst Heart, Sao Paulo, BrazilCtr Cuore Columbus, Milan, ItalyHerzzentrum, Leipzig, GermanyCtr Hosp Prive Beauregard, Marseille, FranceOsped Riuniti Bergamo, Azienda Osped, I-24100 Bergamo, ItalySemmelweis Egyetem Egeszegtudomanyi Kar, Budapest, HungaryJohnson & Johnson, Cordis, Warren, NJ, USAMorice, M, Inst Hosp Jacques Cartier, Ave Noyer Lambert, F-91300 Massy, France TI - A randomized comparison of a sirolimus-eluting stent with a standard stent for coronary revascularization AB - Background: The need for repeated treatment of restenosis of a treated vessel remains the main limitation of percutaneous coronary revascularization. Because sirolimus (rapamycin) inhibits the proliferation of lymphocytes and smooth-muscle cells, we compared a sirolimus-eluting stent with a standard uncoated stent in patients with angina pectoris. Methods: We performed a randomized, double-blind trial to compare the two types of stents for revascularization of single, primary lesions in native coronary arteries. The trial included 238 patients at 19 medical centers. The primary end point was in-stent late luminal loss (the difference between the minimal luminal diameter immediately after the procedure and the diameter at six months). Secondary end points included the percentage of in-stent stenosis of the luminal diameter and the rate of restenosis (luminal narrowing of 50 percent or more). We also analyzed a composite clinical end point consisting of death, myocardial infarction, and percutaneous or surgical revascularization at 1, 6, and 12 months. Results: At six months, the degree of neointimal proliferation, manifested as the mean (+/-SD) late luminal loss, was significantly lower in the sirolimus-stent group (-0.01+/-0.33 mm) than in the standard-stent group (0.80+/-0.53 mm, P<0.001). None of the patients in the sirolimus-stent group, as compared with 26.6 percent of those in the standard-stent group, had restenosis of 50 percent or more of the luminal diameter (P<0.001). There were no episodes of stent thrombosis. During a follow-up period of up to one year, the overall rate of major cardiac events was 5.8 percent in the sirolimus-stent group and 28.8 percent in the standard-stent group (P<0.001). The difference was due entirely to a higher rate of revascularization of the target vessel in the standard-stent group. Conclusions: As compared with a standard coronary stent, a sirolimus-eluting stent shows considerable promise for the prevention of neointimal proliferation, restenosis, and associated clinical events MH - Brazil MH - France MH - Germany MH - Hungary MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 1226 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0028-4793 UR - ISI:000176012500002 L2 - BALLOON ANGIOPLASTY; ARTERY DISEASE; INTRAVASCULAR ULTRASOUND; NEOINTIMAL FORMATION; COATED STENTS; RESTENOSIS; IMPLANTATION; ATHERECTOMY; RAPAMYCIN; MECHANISMS SO - New England Journal of Medicine 2002 ;346(23):1773-1780 6228 UI - 10240 AU - Moron I AU - Ramirez-Lugo L AU - Ballesteros MA AU - Gutierrez R AU - Miranda MI AU - Gallo M AU - Bermudez-Rattoni F AD - Univ Granada, Dept Expt Psychol & Physiol Behav, E-18071 Granada, SpainUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoUniv Granada, Inst Neurosci F Oloriz, E-18071 Granada, SpainMoron, I, Univ Granada, Dept Expt Psychol & Physiol Behav, Campus Cartuja, E-18071 Granada, Spain TI - Differential effects of bicuculline and muscimol microinjections into the nucleus basalis magnocellularis in taste and place aversive memory formation AB - The role of the nucleus basalis magnocellularis (NBM) in learning and memory has been demonstrated in different learning paradigms such as conditioned taste aversion (CTA) and inhibitory avoidance (IA). This participation has been related to the cholinergic system, but recent studies have reported the potential role of other neurotransmitters such as GABA. The effects of acute intracerebral administration of the GABAergic antagonist bicuculline (0.05 mug) and the GABAergic agonist muscimol (0.05 mug) into the NBM of male Wistar rats were assessed in CTA and IA learning. In both learning tasks, the drug administration was performed before the acquisition. Taste aversion learning was not affected by the infusion of any of the drugs administered. IA acquisition was not affected by the administration of bicuculline or muscimol, requiring similar number of trials to reach the learning criterion. However, when the rats were tested 24 h later, those injected with bicuculline or muscimol showed an impairment of the IA learning. The present results support a role of the GABAergic system in the consolidation process of IA learning. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000178116800045 L2 - behavioral conditioning;GABA;learning;amygdala;insular cortex;CORTICAL ACETYLCHOLINE-RELEASE; DOUBLE Y-MAZE; PASSIVE-AVOIDANCE; CHOLINERGIC PROJECTIONS; REVERSIBLE INACTIVATION; INHIBITORY AVOIDANCE; EXCITOTOXIC LESIONS; CHRONIC INFUSION; INSULAR CORTEX; WATER MAZE SO - Behavioural Brain Research 2002 ;134(1-2):425-431 6229 UI - 10287 AU - Morossi C AU - Di Marcantonio P AU - Franchini M AU - Malagnini L AU - Chavez M AD - Osserv Astron Trieste, INAF, I-34131 Trieste, ItalyUniv Trieste, Dipartimento Astron, I-34131 Trieste, ItalyInst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoMorossi, C, Osserv Astron Trieste, INAF, Via GB Tiepolo 11, I-34131 Trieste, Italy TI - Metallicity determinations from ultraviolet-visual spectrophotometry. I. The test sample AB - New visual spectrophotometric observations of non-supergiant solar neighborhood stars are combined with IUE Newly Extracted Spectra (INES) energy distributions in order to derive their overall metallicities, [M/H]. This fundamental parameter, together with effective temperature and apparent angular diameter, is obtained by applying the flux-fitting method while surface gravity is derived from the comparison with evolutionary tracks in the theoretical H-R diagram. Trigonometric parallaxes for the stars of the sample are taken from the Hipparcos Catalogue. The quality of the flux calibration is discussed by analyzing a test sample via comparison with external photometry. The validity of the method in providing accurate metallicities is tested on a selected sample of G-type stars with well-determined atmospheric parameters from recent high-resolution spectral analysis. The extension of the overall procedure to the determination of the chemical composition of all the INES non-supergiant G-type stars with accurate parallaxes is planned in order to investigate their atmospheric temperature structure MH - Italy MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000178033200035 L2 - stars : abundances;stars : fundamental parameters;ultraviolet : stars;METAL-POOR STARS; EFFECTIVE TEMPERATURES; CHEMICAL-COMPOSITION; GALACTIC DISK; NEARBY STARS; COOL STARS; T-EFF; PARAMETERS; ABUNDANCES; CATALOG SO - Astrophysical Journal 2002 ;577(1):377-388 6230 UI - 9240 AU - Morrow AL AU - Ruiz-Palacios GM AU - Altaye M AU - Jiang X AU - Guerrero ML AU - Meinzen-Derr JK AU - Farkas T AU - Chaturvedi P AU - Pickering LK AU - Newburg DS AD - Cincinnati Childrens Hosp Med Ctr, Cincinnati, OH, USAInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoUniv Massachusetts, Sch Med, Shriver Ctr, Waltham, MA, USACtr Dis Control & Prevent, Atlanta, GA, USA TI - Human milk oligosaccharide homologs of Lewis blood group epitopes and protection against diarrhea in breastfed infants MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 0959-6658 UR - ISI:000178448200029 SO - Glycobiology 2002 ;12(10):648-648 6231 UI - 11012 AU - Moses Y AU - Rajsbaum S AD - Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, IsraelUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMoses, Y, Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel TI - A layered analysis of consensus AB - This paper introduces a simple notion of layering as a tool for analyzing well-behaved runs of a given model of distributed computation. Using layering, a model-independent analysis of the consensus problem is performed and then applied to proving lower bounds and impossibility results for consensus in a number of familiar and less familiar models. The proofs are simpler and more direct than existing ones, and they expose a unified structure to the difficulty of reaching consensus. In particular, the proofs for the classical synchronous and asynchronous models now follow the same outline. A new notion of connectivity among states in runs of a consensus protocol, called potence connectivity, is introduced. This notion is more general than previous notions of connectivity used for this purpose and plays a key role in the uniform analysis of consensus MH - Israel MH - Mexico|Distrito Federal PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 15 U4 - Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0097-5397 UR - ISI:000175899100001 L2 - distributed systems;shaved-memory systems;topology;consensus;impossibility results;lower bounds;DISTRIBUTED 1-SOLVABLE TASKS; TIGHT BOUNDS; AGREEMENT; COMPLEXITY; MEMORY SO - Siam Journal on Computing 2002 ;31(4):989-1021 6232 UI - 9902 AU - Mosqueda-Taylor A AU - Carlos-Bregni R AU - Ramirez-Amador V AU - Palma-Guzman JM AU - Esquivel-Bonilla D AU - Hernandez-Rojas LA AD - Univ Autonoma Metropolitana Xochimilco, Dept Atenc Salud, Mexico City 04960, DF, MexicoHosp Herrera Llerandi, AMEDESGUA, Dept Pathol, Guatemala City, GuatemalaUniv Autonoma Puebla, Fac Estomatol Benemerita, Puebla, MexicoHosp Gen Puebla Dr Eduardo Vazquez Navarro, Serv Cirugia Oral & Maxilofacial, Puebla, MexicoHosp Gen San Juan de Dios, Dept Cirugia Bucomaxilofacial, Guatemala City, GuatemalaMosqueda-Taylor, A, Univ Autonoma Metropolitana Xochimilco, Dept Atenc Salud, Calzado del Hueso 1100,Col Villa Quietud, Mexico City 04960, DF, Mexico TI - Odontoameloblastoma. Clinico-pathologic study of three cases and critical review of the literature AB - The odontoameloblastoma (OA), is an infrequent neoplasm. To date, there are less than 50 cases reported as OA or ameloblastic odontoma in the English dental literature, but only 14 (including three of our own material), fulfill the histological criteria of the current WHO histological classification of odontogenic tumours. Nine occurred in men and five in women (male to female ratio 1.8:1). Age ranged from 2 to 50 years (mean 20.2 years), and nine cases (64.2%) were diagnosed during the first two decades. Maxilla and mandible were equally involved, and most cases occurred posterior to the canines (71.4%). Follow-up ranged from 6 months to 8 years (mean: 25.5 months). Of the 12 cases with informed follow-up, two recurred once (at 24 and 18 months, respectively), and one case had two documented recurrences, at 6 and 49 months. Although OA tends to occur at an earlier age than conventional ameloblastoma, it has practically the same potential to produce bone expansion, root resorption and recurrence. For these reasons OA should be treated in a similar fashion, with wide surgical excision and close follow-up for at least 5 years. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Guatemala MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Oncology;Dentistry, Oral Surgery & Medicine U5 - J;Review AV - English IS - 0964-1955 UR - ISI:000179044100011 L2 - odontogenic tumours;ameloblastoma;odontoma;odontoameloblastoma;mixed odontogenic tumours;MIXED ODONTOGENIC-TUMORS; ODONTOMAS SO - Oral Oncology 2002 ;38(8):800-805 6233 UI - 10957 AU - Mostovoy J AU - Stanford T AD - Univ Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca, Morelos, MexicoNew Mexico State Univ, Dept Math Sci, Las Cruces, NM 88003, USAMostovoy, J, Univ Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, AP 273-3, Cuernavaca, Morelos, Mexico TI - On invariants of Morse knots AB - We define and study Vassiliev invariants for (long) Morse knots. It is shown that there are Vassiliev invariants which can distinguish some topologically equivalent Morse knots. In particular, there is an invariant of order 3 for Morse knots with one maximum that distinguishes two different representations of the figure eight knot. We also present the results of computer calculations for some invariants of low order. It turns out that for Morse knots with two maxima there is a Z/2-valued invariant of order 6 which is not a reduction of any integer-valued invariant. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000176081400010 L2 - Morse knots;Vassiliev invariants SO - Topology and Its Applications 2002 ;121(1-2):105-118 6234 UI - 11836 AU - Mostovoy J AU - Willerton S AD - Univ Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca 62191, Morelos, MexicoHeriot Watt Univ, Dept Math, Edinburgh EH14 4AS, Midlothian, ScotlandMostovoy, J, Univ Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, AP 273-3, Cuernavaca 62191, Morelos, Mexico TI - Free groups and finite-type invariants of pure braids AB - In this paper finite type invariants (also known as Vassiliev invariants) of pure braids are considered from a group-theoretic point of views. New results include a construction of a universal invariant with integer coefficients based on the Magnus expansion of a free group and a calculation of numbers of independent invariants of each type for all pure braid groups MH - Mexico|Morelos MH - United Kingdom PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0305-0041 UR - ISI:000173665600008 L2 - DIMENSION SUBGROUP; SERIES SO - Mathematical Proceedings of the Cambridge Philosophical Society 2002 ;132():117-130 6235 UI - 9886 AU - Mota-Rojas D AU - Martinez-Burnes J AU - Trujillo-Ortega ME AU - onso-Spilsbury ML AU - Ramirez-Necoechea R AU - Lopez A AD - Univ Autonoma Tamaulipas, Fac Med Vet & Zootecnia, Div Estudios Posgrado & Invest, Mexico City, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Dept Prod Agr & Anim, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Cerdos, Mexico City 04510, DF, MexicoUniv Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaMartinez-Burnes, J, Univ Autonoma Tamaulipas, Fac Med Vet & Zootecnia, Div Estudios Posgrado & Invest, Mexico City, DF, Mexico TI - Effect of oxytocin treatment in sows on umbilical cord morphology, meconium staining, and neonatal mortality of piglets AB - Objective-To evaluate the effect of 2 oxytocin products administered to sows at the onset of fetal expulsion on the integrity of umbilical cords, meconium staining, and piglet mortality. Animals-2099 neonatal pigs. Procedure-180 parturient sows were randomly assigned to 3 stratified groups of 60 sows each. Two groups of sows were injected IM at the onset of fetal expulsion with 1 of 2 oxytocin commercial products (20, 40, or 50 U for sows weighing 120 to 150 kg, 151 to 250 kg, or greater than or equal to251 kg, respectively). Control sows were treated IM with saline (0.9% NaCl) solution. Farrowing time, expulsion intervals, and numbers of stillborn and liveborn piglets were recorded for each sow. Piglets were evaluated for inspiratory effort, heart rates, and degree of meconium staining of skin (nonstained, and moderately or severely stained). Umbilical cords were classified as normal in appearance, edematous, congested, hemorrhagic, or ruptured. Results-Oxytocin-treated sows had a significant decrease in farrowing time and expulsion intervals and also had a significantly higher number of stillborn piglets per litter, compared with control sows. The number of piglets per litter with ruptured and hemorrhagic umbilical cords was significantly greater in oxytocin-treated sows, compared with control sows. In near-death stillborn piglets, oxytocin treatment significantly decreased inspiratory efforts at birth and increased the rate and severity of meconium staining, compared with saline treatment. Conclusions and Clinical Relevance-Oxytocin given to sows at the onset of fetal expulsion significantly increases the rate of fetal distress, anoxia, and intrapartum death in piglets MH - Canada MH - Mexico|Distrito Federal PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 18 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000179048600016 L2 - ASPIRATION SYNDROME; PERINATAL MORTALITY; AMNIOTIC-FLUID; PARTURITION; SWINE; MANAGEMENT; INDUCTION; BEHAVIOR; MODEL; PIG SO - American Journal of Veterinary Research 2002 ;63(11):1571-1574 6236 UI - 11553 AU - Mota RD AU - Valcarce A AU - Fernandez F AU - Entem DR AU - Garcilazo H AD - Inst Politecn Nacl, Unidad Profes Interdisciplinaria Ingn & Tecnol Av, Mexico City 07740, DF, MexicoInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainUniv Valencia, Dept Fis Teor, E-46100 Valencia, SpainUniv Idaho, Dept Phys, Moscow, ID 83844, USAMota, RD, Inst Politecn Nacl, Unidad Profes Interdisciplinaria Ingn & Tecnol Av, A Inst Politecn Nacl 2580,Col Laguna Ticoman, Mexico City 07740, DF, Mexico TI - Nonlocal calculation for nonstrange dibaryons and tribaryons AB - We study the possible existence of nonstrange dibaryons and tribaryons by solving the bound-state problem of the two- and three-body systems composed of nucleons and deltas. The two- body systems are NN, NDelta, and DeltaDelta, while the three-body systems are NNN, NNDelta, NDeltaDelta, and DeltaDeltaDelta. We use as input the nonlocal NN, NDelta, and DeltaDelta potentials derived from the chiral quark cluster model by means of the resonating group method. We compare with previous results obtained from the local version based on the Born-Oppenheimer approximation MH - Mexico|Distrito Federal MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000174548200017 L2 - QUARK CLUSTER MODEL; NUCLEON ELASTIC-SCATTERING; DELTA-DELTA SYSTEMS; BOUND-STATE PROBLEM; P PHASE-SHIFTS; DIPROTON RESONANCES; MASS RANGE SO - Physical Review C 2002 ;65(3): 6237 UI - 9810 AU - Motamayor JC AU - Risterucci AM AU - Lopez PA AU - Ortiz CF AU - Moreno A AU - Lanaud C AD - CIRAD, F-34398 Montpellier 5, FranceINIFAP, Huimanguillo, Tabasco, MexicoColegio Postgrad, Huimanguillo, Tabasco, MexicoFONAIAP, Estac Expt Miranda, Caucagua, Edo Miranda, VenezuelaMotamayor, JC, ARS, USDA, 13601 Old Cutler Rd, Miami, FL 33158, USA TI - Cacao domestication I: the origin of the cacao cultivated by the Mayas AB - Criollo cacao (Theobroma cacao ssp. cacao) was cultivated by the Mayas over 1500 years ago. It has been suggested that Criollo cacao originated in Central America and that it evolved independently from the cacao populations in the Amazon basin. Cacao populations from the Amazon basin are included in the second morphogeographic group: Forastero, and assigned to T. cacao ssp. sphaerocarpum. To gain further insight into the origin and genetic basis of Criollo cacao from Central America, RFLP and microsatellite analyses were performed on a sample that avoided mixing pure Criollo individuals with individuals classified as Criollo but which might have been introgressed with Forastero genes. We distinguished these two types of individuals as Ancient and Modern Criollo. In contrast to previous studies, Ancient Criollo individuals formerly classified as 'wild', were found to form a closely related group together with Ancient Criollo individuals from South America. The Ancient Criollo trees were also closer to Colombian-Ecuadorian Forastero individuals than these Colombian-Ecuadorian trees were to other South American Forastero individuals. RFLP and microsatellite analyses revealed a high level of homozygosity and significantly low genetic diversity within the Ancient Criollo group. The results suggest that the Ancient Criollo individuals represent the original Criollo group. The results also implies that this group does not represent a separate subspecies and that it probably originated from a few individuals in South America that may have been spread by man within Central America MH - France MH - Mexico|Tabasco MH - USA MH - Venezuela PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 20 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-067X UR - ISI:000179334600008 L2 - Theobroma cacao L.;Criollo;genetic diversity;domestication;RFLP;microsatellites;THEOBROMA-CACAO; GENETIC DIVERSITY; LINKAGE MAP; RFLP; MARKERS; VARIABILITY; VULGARIS; MEXICO; RAPD; DNA SO - Heredity 2002 ;89():380-386 6238 UI - 10792 AU - Moukarzel CF AU - de Menezes MA AD - IPN, CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoUniv Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, BrazilMoukarzel, CF, IPN, CINVESTAV, Dept Fis Aplicada, Ave Tecnol Km 6, Merida 97310, Yucatan, Mexico TI - Shortest paths on systems with power-law distributed long-range connections AB - We discuss shortest-path lengths l(l)(r) on periodic rings of size L supplemented with an average of pL randomly located long-range links whose lengths are distributed according to P(l)similar tol(-mu). Using resealing arguments and numerical simulation on systems of up to 10(7) sites, we show that a characteristic length exists such that l(r)similar tor for r<ξ but l(r)&SIM;r(θs(μ)) for r>>xi. For small p we find that the shortest-path length satisfies the scaling relation l(r,mu,p)/xi = f(mu,r/xi). Three,regions with different asymptotic behaviors are found, respectively: (a) mu > 2 where theta(s) = 1, (b) 1 < μ < 2, where 0 < θ(s)(μ) < 1/2, and (c) mu < 1 where l(r) behaves logarithmically, i.e., θ(s) = 0. The characteristic length ξ is of the form ξ&SIM;p(-ν) with ν = 1/(2 - μ) in region (b), but depends on L as well in region (c). A directed model of shortest paths is solved and compared with numerical results MH - Brazil MH - Mexico|Yucatan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000176552500128 L2 - SMALL-WORLD NETWORKS; RENORMALIZATION-GROUP; CRITICAL-BEHAVIOR; ISING-MODEL; POTTS-MODEL; COMPUTER-SIMULATION; CRITICAL EXPONENTS; LINEAR-POLYMERS; ONE-DIMENSION; SPIN MODELS SO - Physical Review e 2002 ;65(5): 6239 UI - 11345 AU - Mount DB AU - Arias I AU - Xie QZ AU - Mercado A AU - Gamba G AD - Harvard Inst Med, Brigham & Womens Hosp, Div Renal, Boston, MA 02115, USAHarvard Inst Med, Vet Adm Med Ctr W Roxbury, Div Renal, Boston, MA 02115, USAUNAM, Mexico City, DF, MexicoINNSZ, Unit Mol Physiol, Mexico City, DF, MexicoVanderbilt Univ, Ctr Med, Nashville, TN 37232, USA TI - Cloning and characterization of SLC12A9, a new member of the cation-chloride cotransporter gene family MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593900455 SO - Faseb Journal 2002 ;16(5):A807-A807 6240 UI - 11854 AU - Moustafa MA AU - Samuel FH AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaCent Met Res & Dev Inst, Cairo, EgyptMet Casting Technol Inc, GM Powertrain Grp, Milford, MA, USACorp Nemak SA CV, Res & Dev, Garza Carcia, NL, MexicoSamuel, FH, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Effect of Mg and Cu additions on the microstructural characteristics and tensile properties of Sr-modified Al-Si eutectic alloys AB - The present work was performed on twenty-one alloys containing Al-11.5 wt% Si, with magnesium (Mg) in the range of 0.1-0.4 wt%, and copper (Cu) in the range of 1.0-3.0 wt%. Fluidity measurements and thermal analysis for each of these alloy melts were carried out. The alloys were cast in the form of tensile test bars. The test bars were solution heat treated at a temperature of similar to500degreesC for 8 h, then quenched in hot water (60degreesC), followed by artificial ageing at 155 degreesC for 5 h, and then cooling in air. The effects of Mg and Cu additions on the tensile properties, depression in the Al-Si eutectic temperature, and microstructural characteristics (Si and Cu-phase particle characteristics and morphology) have been discussed in detail. The results show that the addition of Mg decreases the fluidity and the eutectic Si temperature. While addition of Cu also decreases the eutectic temperature, the fluidity, however, is increased. The presence of Mg and Cu decreases the modifying effect of Sr on the Si particles due to an increase in the solidification time, as well as the Sr, Mg, Cu interactions that occurs as a result of these additions. Mg additions in the range of 0.1-0.4 wt% increase YS (from 22% up to 94%) and UTS (from 7% up to 52%) and decrease the percent elongation (40%) depending on the Cu content of the alloy, i.e., the higher the Cu content, the lower the increase in strength. Addition of Cu has a similar effect on YS and UTS at alloy Mg levels of 0.1 wt% only, with no effect at higher Mg values, while elongation continuously decreases. The volume fraction of Al2Cu phase increases by approximately 0.76% for every 1 wt% increase in Cu. This observation is important in the selection of the appropriate solution heat treatment regime in order to avoid incipient melting MH - Canada MH - Egypt MH - Mexico|Nuevo Leon MH - USA PB - SHEFFIELD: CASTINGS TECHNOLOGY INT RP - NOT IN FILE U3 - TC 15 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000173639000005 L2 - 413 type aluminium alloys;Al-Si eutectic alloys;Mg and Cu additions;Sr modification;fluidity;thermal analysis;heat treatment;tensile properties;SOLUTION HEAT-TREATMENT; PRECIPITATION; DISSOLUTION; SYSTEMS SO - International Journal of Cast Metals Research 2002 ;14(4):235-253 6241 UI - 11760 AU - Moya-Hernandez R AU - Rueda-Jackson JC AU - Ramirez MT AU - Vazquez GA AU - Havel J AU - Rojas-Hernandez A AD - Univ Nacl Autonoma Mexico, Secc Quim Analit, Cuautittlan Izcalli, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoMasaryk Univ, Dept Analyt Chem, CS-61137 Brno, Czech RepublicMoya-Hernandez, R, Univ Nacl Autonoma Mexico, Secc Quim Analit, Cuautittlan Izcalli, Mexico TI - Statistical study of distribution diagrams for two-component systems: Relationships of means and variances of the discrete variable distributions with average ligand number and intrinsic buffer capacity MH - Czech Republic MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Education, Scientific Disciplines U5 - J;Article AV - English IS - 0021-9584 UR - ISI:000173959300027 L2 - PREDOMINANCE-ZONE DIAGRAMS SO - Journal of Chemical Education 2002 ;79(3):389-392 6242 UI - 10912 AU - Moya M AU - Pandis SN AU - Jacobson MZ AD - Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213, USACarnegie Mellon Univ, Dept Engn & Publ Policy, Pittsburgh, PA 15213, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City, DF, MexicoStanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305, USAPandis, SN, Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA TI - Is the size distribution of urban aerosols determined by thermodynamic equilibrium? An application to Southern California AB - A size-resolved equilibrium model, SELIQUID, is presented and used to simulate the size-composition distribution of semi-volatile inorganic aerosol in an urban environment. The model uses the efflorescence branch of aerosol behavior to predict the equilibrium partitioning of the aerosol components between the gas phase and a size-resolved aerosol population over the entire RH domain. Predictions of SELIQUID are compared against size-resolved composition measurements at different locations during the Southern California Air Quality Study. Based on the modeling results, the size distribution of sub-micrometer nitrate and ammonium can be determined by thermodynamic equilibrium when the RH > 60%. In cases where the RH < 60%, the assumption that all aerosol particles are metastable liquid solutions may introduce unacceptable errors. On the other hand, the equilibrium assumption, in some cases at least, introduces errors in the calculation of the coarse (particles with diameter <1 mum or so) nitrate and ammonium that increase with particle size. Finally, the inclusion of crustal species is important in modeling the size distribution of coarse inorganic aerosols when the concentration of these species is high. The effect of these crustal species can be complex and counterintuitive. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000176431500007 L2 - thermodynamic equilibrium;inorganic aerosols;efflorescence;aerosol size distribution;SCAQS;AMMONIUM-NITRATE AEROSOL; INORGANIC AEROSOL; REGIONAL AEROSOLS; ACID NEUTRALITY; MODELING URBAN; GAS; DISSOCIATION; EVAPORATION; COEFFICIENT; SYSTEM SO - Atmospheric Environment 2002 ;36(14):2349-2365 6243 UI - 10002 AU - Mozerov M AU - Kober V AU - Tchernykh A AU - Choi TS AD - Russian Acad Sci, Inst Informat Transmiss Problems, Lab Digital Opt, Moscow 101447, RussiaCICESE, Div Fis Applicada, Dept Ciencias Computac, Ensenada 22860, Baja California, MexicoKwangju Inst Sci & Technol, Dept Mechatron, Kwang San Ku, Kwangju 506712, South KoreaMozerov, M, Russian Acad Sci, Inst Informat Transmiss Problems, Lab Digital Opt, Bolshoi Karetnii 19, Moscow 101447, Russia TI - Motion estimation using modified dynamic programming AB - A new method for computing precise estimates of the motion vector field of moving objects in a sequence of images is proposed. Correspondence vector-field computation is formulated as a matching optimization problem for multiple dynamic images. The proposed method is a heuristic modification of dynamic programming applied to the 2-D optimization problem. Motion-vector-field estimates using real movie images demonstrate good performance of the algorithm in terms of dynamic motion analysis. 2002 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Russia MH - South Korea PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000178713900029 L2 - motion analysis;motion estimation;stereo vision;dynamic programming;OPTICAL-FLOW; STEREO; ALGORITHM; GRADIENT SO - Optical Engineering 2002 ;41(10):2592-2598 6244 UI - 11988 AU - Muci-Kuchler KH AU - Miranda-Valenzuela JC AU - Soriano-Soriano S AD - Univ Detroit Mercy, Dept Engn Mech, Detroit, MI 48219, USAProlec GE, Power Div, Apodaca 66600, Nuevo Leon, MexicoMuci-Kuchler, KH, Univ Detroit Mercy, Dept Engn Mech, 4001 W McNichols Rd,POB 19900, Detroit, MI 48219 USA TI - Use of the tangent derivative boundary integral equations for the efficient computation of stresses and error indicators AB - In this work, a new global reanalysis technique for the efficient computation of stresses and error indicators in two-dimensional elastostatic problems is presented. In the context of the boundary element method, the global reanalysis technique can be viewed as a post-processing activity that is carried out once an analysis using Lagrangian elements has been performed. To do the reanalysis, the functional representation for the displacements is changed from Lagrangian to Hermite, introducing the nodal values of the tangential derivatives of those quantities as additional degrees of freedom. Next, assuming that the nodal values of the displacements and the tractions remain practically unchanged from the ones obtained in the analysis using Lagrangian elements, the tangent derivative boundary integral equations are collocated at each functional node in order to determine the additional degrees of freedom that were introduced. Under this scheme, a second system of equations is generated and, once it is solved, the nodal values of the tangential derivatives of the displacements are obtained. This approach gives more accurate results for the stresses at the nodes since it avoids the need to differentiate the shape functions in order to obtain the normal strain in the tangential direction. When compared with the use of Hermite elements, the global reanalysis technique has the attraction that the user does not have to give as input data the additional information required by this type of elements. Another important feature of the proposed approach is that an efficient error indicator for the values of the stresses can also be obtained comparing the values for the stresses obtained through the use of Lagrangian elements and the global reanalysis technique. Copyright (C) 2001 John Wiley Sons, Ltd MH - Mexico|Nuevo Leon MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0029-5981 UR - ISI:000173285100003 L2 - adaptive meshing;Hermite boundary elements;hypersingular boundary integral equations;global reanalysis;SUPERCONVERGENT PATCH RECOVERY; ADAPTIVE MESH REFINEMENT; ELEMENT METHOD; FORMULATION; ELASTICITY; DISPLACEMENT; GRADIENTS SO - International Journal for Numerical Methods in Engineering 2002 ;53(4):797-824 6245 UI - 7530 AU - Muller A AU - Homey B AU - Soto H AU - Catron D AU - Buchanan ME AU - McClanahan T AU - Murphy E AU - Yuan W AU - Wagner SN AU - Barrera JL AU - Mohar A AU - Verastegui E AU - Zlotnik A AU - Ge N AD - DNAX Res Inst Mol & Cellular Biol Inc, Palo Alto, CA 94304, USAUniv Dusseldorf, Dept Radiat Oncol, D-40225 Dusseldorf, GermanyUniv Dusseldorf, Dept Dermatol, D-40225 Dusseldorf, GermanyUniv Essen Gesamthsch, Dept Dermatol, D-45147 Essen, GermanyInst Nacl Cancerol, Tlalpan 14000, DF, Mexico TI - Chemokines: a molecular basis for organ-specific metastasis MH - Germany MH - Mexico|Distrito Federal MH - USA PB - MUNICH: URBAN & VOGEL RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Meeting Abstract AV - English IS - 0179-7158 UR - ISI:000176659600071 SO - Strahlentherapie und Onkologie 2002 ;178():18-18 6246 UI - 11209 AU - Muller A AU - Phaneuf RA AU - Aguilar A AU - Gharaibeh MF AU - Schlachter AS AU - Alvarez I AU - Cisneros C AU - Hinojosa G AU - McLaughlin BM AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyUniv Nevada, Dept Phys, Reno, NV 89557, USALawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoQueens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North IrelandHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USAMuller, A, Univ Giessen, Inst Kernphys, D-35392 Giessen, Germany TI - Photoionization of C2+ ions: time-reversed recombination of C3+ with electrons AB - We have investigated photoionization (PI) of the S-1 ground state and P-3(o) metastable states of C2+ ions in the photon energy range 40.8-56.9 eV at a resolution of 30 meV. Absolute PI cross sections have been measured using a photon-ion merged beam arrangement at the Advanced Light Source. Detailed calculations using the semi-relativistic Breit-Pauli R-matrix approach suggest a fraction of 40% of metastable ions in the primary beam of the experiment. The present results are discussed in the light of previous electron-C3+-ion photorecombination (PR) studies. As an example, the role of the intermediate C2+(2p4d P-1) resonance in both PI and PR is analysed MH - Germany MH - Mexico|Morelos MH - United Kingdom MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 20 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000175364400001 L2 - CROSS-SECTIONS; THRESHOLD; CARBON SO - Journal of Physics B-Atomic Molecular and Optical Physics 2002 ;35(7):L137-L143 6247 UI - 9779 AU - Munoz-Gutierrez M AU - Blache D AU - Martin GB AU - Scaramuzzi RJ AD - Univ London Royal Vet Coll, Dept Vet Basic Sci, London NW1 0TU, EnglandUniv Western Australia, Dept Anim Sci & Prod, Nedlands, WA 6000, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoMunoz-Gutierrez, M, Univ London Royal Vet Coll, Dept Vet Basic Sci, Royal Coll St, London NW1 0TU, England TI - Folliculogenesis and ovarian expression of mRNA encoding aromatase in anoestrous sheep after 5 days of glucose or glucosamine infusion or supplementary lupin feeding AB - Improved nutrition increases ovulation rate in sheep and there is evidence that intra-ovarian pathways mediate responses to nutrition. An experiment was conducted to examine the effect of dietary energy on folliculogenesis. Anoestrous Merino ewes were fed a diet of wheat straw alone (control, n = 5), or wheat straw supplemented with lupins (500 g day(-1), n = 5). Other ewes were fed wheat straw and infused with glucose (50 mmol h(-1), n = 5) or with glucosamine (3.5 mmol h(-1), n = 5). Intravaginal progestagen sponges were inserted for 12 days, and nutritional treatments were started 5 days before sponge removal. At sponge removal, the ewes were injected with a regimen of GnRH pulses (500 ng every 4 h from 0 to 12 h; 250 ng every 2 h from 14 to 24 h; and 200 ng every I h from 25 to 36 h) to simulate normal follicular development. Thirty-six hours after sponge removal, the animals were killed and the ovaries were collected and stored at -80degreesC. The ovaries were sectioned serially every 10 pm. Every 20th section was stained (to estimate number and diameter of follicles) and every 17-19th section was probed by in situ hybridization for P-450 aromatase. Data were analysed using ANOVA and chi-squared tests. There was an effect of treatment (P < 0.05) on the number of follicles 2-3, 3-4 and 6-7 mm in diameter. Aromatase-positive follicles (1.6-7.9 mm) were detected in 31 follicles from 15 ewes across all four groups. In ten animals, the largest follicle was aromatase-positive. The diameters of aromatase-positive follicles were larger (P = 0.004) in lupin fed compared with glucose-infused ewes (4.9 +/- 0.5, 3.6 +/- 0.7, 5.3 +/- 0.5 and 4.2 +/- 0.5 mm for control, glucose-infused, lupin-fed and glucosamine-infused groups, respectively). Treatment did not affect the plasma concentration of FSH when compared with controls, indicating that the energy supplements were modifying recruited (2-3 mm and 3-4 mm) and selected follicles (> 6 mm) directly. In conclusion, dietary energy can directly stimulate folliculogenesis in recruited and selected follicles, and this effect may be mediated by changes in systemic leptin concentrations and the hexosamine energy-sensing pathway in the follicle MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal PB - CAMBRIDGE: SOC REPRODUCTION FERTILITY RP - NOT IN FILE U3 - TC 11 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1470-1626 UR - ISI:000179389700015 L2 - GROWTH-FACTOR-ALPHA; DIET-INDUCED OBESITY; RAT GRANULOSA-CELLS; OVULATION RATE; LEPTIN RESISTANCE; ESTROUS-CYCLE; OVARIECTOMIZED EWES; FOLLICULAR DYNAMICS; OXYTOCIN RECEPTOR; STEROID SECRETION SO - Reproduction 2002 ;124(5):721-731 6248 UI - 11940 AU - Munoz-Hernandez MA AU - Mckee ML AU - Keizer TS AU - Yearwood BC AU - Atwood DA AD - Auburn Univ, Dept Chem, Auburn, AL 36849, USAUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Kentucky, Dept Chem, Lexington, KY 40506, USAMcKee, ML, Auburn Univ, Dept Chem, Auburn, AL 36849, USA TI - Six-coordinate aluminium cations: characterization, catalysis, and theory AB - The new thf supported cations, [Salen(Bu-t)Al(thf)(2)](+) (2), [Salpen(Bu-t)Al(thf)(2)](+) (3), [Salben(Bu-t)Al(thf)(2)](+) (4) [Salophen(Bu-t)Al(thf)(2)](+) (5) and [Salomphen(Bu-t)Al(thf)(2)](+) (6), with BPh4(-) as the counter anion, have been prepared from salt elimination reactions with the respective Salen(Bu-t)AlCl reagent, including one that is new, Salben(Bu-t)AlCl (1). The cations were observed to polymerize propylene oxide. Based upon the results of experimental and theoretical work the mechanism appears to be one in which a carbocation is the propagating species although the PDI values are remarkably low, approximate to1.2 in some cases. All of the potential catalysts were characterized spectroscopically and, in the case of 3, by X-ray crystallography MH - Mexico|Morelos MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000173477100024 L2 - ETHYLENE POLYMERIZATION CATALYSTS; RING-OPENING POLYMERIZATION; D-ORBITALS; PROPYLENE-OXIDE; COMPLEXES; LIGANDS; 5-COORDINATE; EXTENSION; LACTIDE; MNDO SO - Journal of the Chemical Society-Dalton Transactions 2002 ;(3):410-414 6249 UI - 10131 AU - Murbartian J AU - Arias JM AU - Lee JH AU - Gomora JC AU - Perez-Reyes E AD - Univ Virginia, Dept Pharmacol, Charlottesville, VA 22908, USASogang Univ, Dept Life Sci, Mapo Gu, Seoul 121742, South KoreaUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biofis, Mexico City 04510, DF, MexicoPerez-Reyes, E, Univ Virginia, Dept Pharmacol, POB 800735,1300 Jefferson Pk Ave, Charlottesville, VA 22908 USA TI - Alternative splicing of the rat Ca(v)3.3 T-type calcium channel gene produces variants with distinct functional properties AB - Molecular diversity in T-type Ca2+ channels is produced by expression of three genes, and alternative splicing of those genes. Prompted by differences noted between rat and human Ca(v)3.3 sequences, we searched for splice variants. We cloned six variants, which are produced by splicing at exon 33 and exon 34. Expression of the variants differed between brain regions. The electrophysiological properties of the variants displayed similar voltage-dependent gating, but differed in their kinetic properties. The functional impact of splicing was interrelated, suggesting an interaction. We conclude that alternative splicing of the Ca(v)3.3 gene produces channels with distinct properties. (C) 2002 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000178282500052 L2 - calcium channel;T-type;gene;alternative splicing;electrophysiology;rat;brain;NEURONS; CURRENTS; FAMILY; INACTIVATION; EXPRESSION; ALPHA(1I); NUCLEUS; SUBUNIT; CELLS SO - Febs Letters 2002 ;528(1-3):272-278 6250 UI - 11811 AU - Murbartian J AU - Gomora JC AU - Perez-Reyes E AD - Univ Virginia, Charlottesville, VA 22908, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, Mexico TI - Electrophysiological characterization of two new isoforms of rat CaV3.3 T-type calcium channel MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000173252700493 SO - Biophysical Journal 2002 ;82(1):101A-101A 6251 UI - 9854 AU - Murgich J AU - Merino-Garcia D AU - Andersen SI AU - del Rio JM AU - Galeana CL AD - Inst Venezolano Invest Cient, Ctr Quim, Caracas 1020A, VenezuelaTech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoMurgich, J, Inst Venezolano Invest Cient, Ctr Quim, Apartado 21827, Caracas 1020A, Venezuela TI - Molecular mechanics and microcalorimetric investigations of the effects of molecular water on the aggregation of asphaltenes in solutions AB - The interaction of two model asphaltene molecules from the Athabasca sand oil with a water molecule in a toluene solution was studied by means of molecular mechanics calculations. It was found that water forms bridging H bonds between the heteroatoms of asphaltenes with a considerable span in energies. The stronger H bond found has energies higher than those corresponding to the stacking of the aromatic areas of the same asphaltene molecules. This shows that the water molecule may generate additional mechanisms of aggregation of asphaltenes in toluene solution, as found experimentally. The H bond mechanism depends on the heteroatoms involved, the extension of the aromatic regions, and the steric interference present in the asphaltene molecules. The simulation results have been compared with experimental values of enthalpy of association of two different petroleum asphaltenes obtained by titration calorimetry. A simple dimer dissociation model was used to derive the information about the heat and the constant of dissociation from asphaltenes of Mexico and Alaska obtained from the calorimetric data. The association enthalpies calculated were found to be in excellent agreement with those measured, although the simulation only employed the interaction between averaged molecular structures MH - Denmark MH - Mexico|Distrito Federal MH - Venezuela PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000179087100051 L2 - CALORIMETRY; RECOGNITION; COMPLEX SO - Langmuir 2002 ;18(23):9080-9086 6252 UI - 10602 AU - Murguia-Sanchez G AU - Novelo RA AU - Philbrick CT AU - Marquez-Guzman GJ AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoWestern Connecticut State Univ, Dept Biol & Environm Sci, Danbury, CT 06810, USAMarquez-Guzman, GJ, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Apartado Postal 70-356, Mexico City 04510, DF, Mexico TI - Embryo sac development in Vanroyenella plumosa, Podostemaceae AB - Species of Podostemaceae grow in rapidly flowing tropical rivers, streams and water falls, strongly attached to rock substrates via expanded, adhesive-secreting holdfasts (haptera). Vanroyenella is a monotypic genus endemic to Mexico, occurring in the northern extent of the tropical distribution of Podostemaceae in the New World. Embryo sac development and nucellar plasmodium formation of Vanroyenella plumosa Novelo and Philbrick was studied. The numerous ovules are anatropous, bitegmic, exostomous, and terminucellate, each with a four-celled monosporic embryo sac of the Apinagia type. Disintegration of the nucellus into a plasmodium takes place prior to fertilization. Embryo sac development of Vanroyenella is similar to other members of the Podostemoideae subfamily. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000177124800002 L2 - embryo sac development;Mexico;New World Podostemaceae;Podostemoideae;NEW-WORLD PODOSTEMACEAE; MARATHRUM; SEED SO - Aquatic Botany 2002 ;73(3):201-210 6253 UI - 9884 AU - Murillo-Amador B AU - Troyo-Dieguez E AU - LopezAguilar R AU - Lopez-Cortes A AU - Tinoco-Ojanguren CL AU - Jones HG AU - Kaya C AD - Ctr Invest Biol Noroeste, SC La Paz 23090, Baja Calif Sur, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Hermosillo, Sonora, MexicoUniv Dundee, Dundee DD1 4HN, ScotlandHarran Univ, Fac Agr, Dept Hort, Sanliurfa, TurkeyMurillo-Amador, B, Ctr Invest Biol Noroeste, SC La Paz 23090, Baja Calif Sur, Mexico TI - Matching physiological traits and ion concentrations associated with salt stress in cowpea genotypes AB - The salt tolerance of 25 cowpea genotypes (Vigna unguiculata L. Walp.) was studied during early vegetative growth. Salinity treatments were applied by irrigating with a nutrient solution containing 0, 85, and 170 mmol NaCl/L. Seedling survival decreased linearly as salinity increased, but this enabled cowpea genotypes to be ranked for salinity tolerance according to the magnitudes of slopes of regression of survival percentage on salinity. Sodium concentration was higher in roots than in shoots in all genotypes, and increased significantly in both roots and shoots as salinity increased. Chloride concentration in both roots and shoots increased with increasing salinity in all genotypes, and was higher in shoots than in roots at 85 and 170 mmol NaCl/L. In some cases, Ca, Mg, K, and P concentrations were reduced by an increase in salinity, but none of the genotypes appeared to suffer any nutrient deficiency. We observed wide differences in responses to salinity, and our results suggest that during the growth stage studied, 7 of the 25 genotppes tested could be classified as tolerant or relatively tolerant to salinity (Sonorense, CB3, CB27, Cuarenteno, CB46, Paceno, and IT82D-889) MH - Mexico|Baja California Sur MH - Mexico|Sonora MH - United Kingdom MH - Turkey PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0004-9409 UR - ISI:000179080500007 L2 - Vigna unguiculata;salt tolerance;genetic variability;ion concentration;PHASEOLUS-VULGARIS L; VIGNA-UNGUICULATA; SALINE CONDITIONS; GROWTH-STAGES; TOLERANCE; PLANTS; CULTIVARS; RESPONSES; CALCIUM; SODIUM SO - Australian Journal of Agricultural Research 2002 ;53(11):1243-1255 6254 UI - 10537 AU - Murillo-Amador B AU - Lopez-Aguilar R AU - Kaya C AU - Larrinaga-Mayoral J AU - Flores-Hernandez A AD - Ctr Invest Biol Noroeste, La Paz 23090, Baja California, MexicoHarran Univ, Fac Agr, Dept Hort, Sanliurfa, TurkeyUnidad Reg Univ Zonas Aridas, Bermejillo, Durango, MexicoMurillo-Amador, B, Ctr Invest Biol Noroeste, SC Mar Bermejo No 195 Col,Playa Santa Rita, La Paz 23090, Baja California, Mexico TI - Comparative effects of NaCl and polyethylene glycol on germination, emergence and seedling growth of cowpea AB - Seeds of Paceno and Cuarenteno cultivars of cowpea (Vigna unguiculata L. Walp.) were tested for salt and drought tolerance at germination, seedling emergence and early seedling growth in NaCl and PEG-8000 solutions of different osmotic potentials (0, -0.2, -0.4, -0.6, and -0.8 MPa). Daily and final germination and emergence percentage, as well as germination and seedling emergence rate, and seedling growth were recorded under controlled conditions. Results showed that germination and emergence rate were delayed by both solutions in both cultivars, with differences between cultivars among growth stages, given that cultivar Cuarenteno, showed a higher germination rate than Paceno in NaCl, but Paceno was less affected by NaCl and PEG solutions at the emergence stage. Sodium chloride had a lesser effect on both cultivars in terms of germination rate, emergence rate and the final germination and emergence percentage than did PEG-8000. This conclusively proves that the adverse effect of PEG-8000 on germination, emergence and early seedling growth was due to the osmotic effect rather than the specific ion. Seedling growth was reduced by both stresses, but NaCl usually caused less damage than PEG to cowpea seedlings, suggesting that NaCl and PEG acted through different mechanisms MH - Mexico|Baja California MH - Mexico|Durango MH - Turkey PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Agronomy U5 - J;Article AV - English IS - 0931-2250 UR - ISI:000177256600003 L2 - drought;emergence percentage;emergence rate;germination percentage;germination rate;salinity;seedling growth;Vigna unguiculata;PHASEOLUS-VULGARIS L; SALT TOLERANCE; WATER-STRESS; PROSOPIS-CHILENSIS; SODIUM-CHLORIDE; ION ABSORPTION; SALINITY; PLANTS; YIELD; SEEDS SO - Journal of Agronomy and Crop Science 2002 ;188(4):235-247 6255 UI - 10502 AU - Murphy JB AU - Nance RD AU - Keppie JD AD - St Francis Xavier Univ, Dept Geol, Antigonish, NS B2G 2W5, CanadaOhio Univ, Dept Geol Sci, Athens, OH 45701, USANatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoMurphy, JB, St Francis Xavier Univ, Dept Geol, Antigonish, NS B2G 2W5, Canada TI - Discussion and reply: West African proximity of the Avalon terrane in the latest Precambrian - Discussion MH - Canada MH - Mexico|Distrito Federal MH - USA PB - COLLEGE STN: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0016-7606 UR - ISI:000177389400010 L2 - Avalonia;Amazonia;Neoproterozoic;paleomagnetism;Sm-Nd;isotopes;U-Pb isotopes;West African craton;NOVA-SCOTIA; CONSTRAINTS; HISTORY; BELT; MA SO - Geological Society of America Bulletin 2002 ;114(8):1049-1050 6256 UI - 9958 AU - Murray JB AU - Ruiz JJR AD - Open Univ, Dept Earth Sci, Milton Keynes MK7 6AA, Bucks, EnglandColima Volcano Observ, Colima, Col, MexicoMurray, JB, Open Univ, Dept Earth Sci, Walton Hall, Milton Keynes MK7 6AA, Bucks, England TI - Long-term predictions of the time of eruptions using remote distance measurement at Volcan de Colima, Mexico AB - Series of up to 37 distance measurements made between remote instrument stations and nine reflectors permanently installed on the dome and summit cone of Volcan de Colima, Mexico, show accelerating expansion of the summit and upper part of the cone prior to the eruption that began on 20 November 1998. Acceleration began nearly a year before the eruption, and inverse-rate analysis of measured distances indicates that the time of the eruption could have been predicted. The accuracy increases from approximately 5 weeks for predictions made 25 weeks in advance, down to 13 to 15 days for predictions made 4 weeks in advance. More regular measurement at weekly intervals might have greatly improved the accuracy of the predictions. This and other studies suggest that under some circumstances, for example where observed movements are large and intervals between observations short, regularly repeated ground deformation measurements might give satisfactory predictions of the timing of volcanic eruptions earlier than other methods. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Colima PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000178855900008 L2 - volcanoes;eruption prediction;Colima;ground deformation;inverse rate;dome growth;materials failure forecast method SO - Journal of Volcanology and Geothermal Research 2002 ;117(1-2):79-89 6257 UI - 10550 AU - Murrieta-Cid R AU - Parra C AU - Devy M AD - ITESM, Mexico City, DF, MexicoPontificia Univ Javeriana, Bogota, DC, ColombiaCNRS, LAAS, F-31077 Toulouse 4, FranceMurrieta-Cid, R, ITESM, Campus Ciudad Mexico,Calle Puente 222, Mexico City, DF, Mexico TI - Visual navigation in natural environments: From range and color data to a landmark-based model AB - This paper concerns the exploration of a natural environment by a mobile robot equipped with both a video color camera and a stereo-vision system. We focus on the interest of such a multi-sensory system to deal with the navigation of a robot in an a priori unknown environment, including (1) the incremental construction of a landmark-based model, and the use of these landmarks for (2) the 3-D localization of the mobile robot and for (3) a sensor-based navigation mode. For robot localization, a slow process and a fast one are simultaneously executed during the robot motions. In the modeling process (currently 0.1 Hz), the global landmark-based model is incrementally built and the robot situation can be estimated from discriminant landmarks selected amongst the detected objects in the range data. In the tracking process (currently 4 Hz), selected landmarks are tracked in the visual data; the tracking results are used to simplify the matching between landmarks in the modeling process. Finally, a sensor-based visual navigation mode, based on the same landmark selection and tracking, is also presented; in order to navigate during a long robot motion, different landmarks (targets) can be selected as a sequence of sub-goals that the robot must successively reach MH - Colombia MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence;Robotics U5 - J;Article AV - English IS - 0929-5593 UR - ISI:000177292200004 L2 - vision;robotics;outdoor model building;target tracking;multi-sensory fusion;visual navigation;HAUSDORFF DISTANCE SO - Autonomous Robots 2002 ;13(2):143-168 6258 UI - 9346 AU - Myartseva SN AU - Coronado-Blanco JM AD - Univ Autonoma Tamaulipas, UAM Agron & Ciencias, Ciudad Victoria 87149, Tamaulipas, MexicoMinist Nat Protect Turkmenistan, Natl Inst Deserts Flora & Fauna, Ashkhabad, TurkmenistanMyartseva, SN, Univ Autonoma Tamaulipas, UAM Agron & Ciencias, Ciudad Victoria 87149, Tamaulipas, Mexico TI - A new parasitoid of whiteflies from Mexico, with a key to new world species of the genus Encarsiella (Hymenoptera : Aphelinidae) AB - A new species, Encarsiella tamaulipeca Myartseva and Coronado-Blanco sp. nov., from Mexico is described and illustrated. A new combination is proposed, Encarsiella narroi (Gomez & Garcia) from Encarsia. A key to the species of Encarsiella (females) of the New World is given MH - Mexico|Tamaulipas MH - Turkmenistan PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000180498600012 L2 - Encarsiella sp nov.;distribution;HAYAT HYMENOPTERA; GENERA; ALEYRODIDAE SO - Florida Entomologist 2002 ;85(4):620-624 6259 UI - 10110 AU - Nakagawa T AU - Mazzali M AU - Kang DH AU - Watanabe S AU - Kanellis J AU - Ohashi R AU - Lozada LGS AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AU - Johnson RJ AD - Baylor Coll Med, Div Nephrol, Houston, TX 77030, USAInst Nacl Cardiol 1, Mexico City, DF, MexicoUniv Hosp, Maracaibo, VenezuelaUniv Zulia, Maracaibo 4011, Venezuela TI - On the mechanism of glomerular hypertrophy induced by mild hyperuricemia MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757500667 SO - Journal of the American Society of Nephrology 2002 ;13():135A-135A 6260 UI - 10151 AU - Nance RD AU - Murphy JB AU - Keppie JD AD - Ohio Univ, Dept Geol Sci, Clippinger Labs 316, Athens, OH 45701, USASt Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoNance, RD, Ohio Univ, Dept Geol Sci, Clippinger Labs 316, Athens, OH 45701 USA TI - A Cordilleran model for the evolution of Avalonia AB - Striking similarities between the late Mesoproterozoic-Early Paleozoic record of Avalonia and the Late Paleozoic-Cenozoic history of western North America suggest that the North American Cordillera provides a modem analogue for the evolution of Avalonia and other peri-Gondwanan terranes during the late Precambrian. Thus: (1) The evolution of primitive Avalonian arcs (proto-Avalonia) at 1.2-1.0 Ga coincides with the amalgamation of Rodinia, just as the evolution of primitive Cordilleran arcs in Panthalassa coincided with the Late Paleozoic amalgamation of Pangea. (2) The development of mature oceanic arcs at 750-650 Ma (early Avalonian magmatism), their accretion to Gondwana at ca. 650 Ma, and continental margin arc development at 635 570 Ma (main Avalonian magmatism) followed the breakup of Rodinia at ca. 755 Ma in the same way that the accretion of mature Cordilleran arcs to western North America and the development of the main phase of Cordilleran arc magmatism followed the Early Mesozoic breakup of Pangea. (3) In the absence of evidence for continental collision, the diachronous termination of subduction and its transition to an intracontinental wrench regime at 590-540 Ma is interpreted to record ridge-trench collision in the same way that North America's collision with the East Pacific Rise in the Oligocene led to the diachronous initiation of a transform margin. (4) The separation of Avalonia from Gondwana in the Early Ordovician resembles that brought about in Baja California by the Pliocene propagation of the East Pacific Rise into the continental margin. (5) The Late Ordovician-Early Silurian sinistral accretion of Avalonia to eastern Laurentia emulates the Cenozoic dispersal of Cordilleran terranes and may mimic the paths of future terranes transferred to the Pacific plate. This close similarity in tectonothermal histories suggests that a geodynamic coupling like that linking the evolution of the Cordillera with the assembly and breakup of Pangea, may have existed between Avalonia and the late Precambrian supercontinent Rodinia. Hence, the North American Cordillera is considered to provide an actualistic model for the evolution of Avalonia and other peri-Gondwanan terranes, the histories of which afford a proxy record of supercontinent assembly and breakup in the late Precambrian. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 37 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000178358700002 L2 - Avalonia;arc terranes;supercontinents;North American Cordillera;CAPE-BRETON ISLAND; SOUTHERN NEW-BRUNSWICK; PB GEOCHRONOLOGICAL CONSTRAINTS; PRECAMBRIAN IGNEOUS ROCKS; ND ISOTOPIC EVIDENCE; OSSA-MORENA ZONE; NOVA-SCOTIA; U-PB; COMPOSITE TERRANE; CAROLINA TERRANE SO - Tectonophysics 2002 ;352(1-2):11-31 6261 UI - 11110 AU - Napsuciale M AU - Wirzba A AU - Kirchbach M AD - FZ Julich, Inst Kernphys Theorie, D-52425 Julich, GermanyUniv Guanajuato, Inst Fis, Leon 37150, SpainUniv Aut Zacatecas, Escuela Fis, Zacatecas 98068, MexicoWirzba, A, FZ Julich, Inst Kernphys Theorie, D-52425 Julich, Germany TI - Instantons as unitary spin maker AB - We investigate the relevance of the instanton-induced determinantal 't Hooft interaction to the eta-nucleon coupling g(nNN) within the framework of a three-flavor linear sigma model in the OZI-rule-respecting basis {((s) over bars),(1/root2 + (d) over bard)}. Instantons, in combination with the spontaneous breaking of chiral symmetry, are shown to provide the major mechanism for the ideal mixing between pseudoscalar strange and non-strange quarkonia. As long as 't Hooft's interaction captures most of the basic features of the axial QCD gluon anomaly, we identify the anomaly as the main culprit for the appearance of octet flavor symmetry in the anomalous sectors of the pseudoscalar (and axial vector) mesons. Within this context, unitary spin is shown to be an accidental symmetry due to anomalous gluon dynamics rather than a fundamental symmetry in its own right. Though we find the eta-nucleon coupling constant g(etaNN) to obey a Goldberger-Treiman like relation, the latter does not take its origin front a pole dominance of the induced pseudoscalar form factor of the octet axial current, but from a subtle flavor-mixing mechanism that is traced back to instanton dynamics. The model presented allows for possible generalizations to non-ideal mixing angles and different values of the meson decay constants in the strange and non-strange sectors, respectively. Finally, we discuss the issue as to what extent the eta meson may be considered as a Goldstone boson under the constraints of the anomaly-produced unitary spin. (C) 2001 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Zacatecas MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000175730000015 L2 - flavor symmetry;eta meson;instantons;OZI rule;eta N coupling;GOLDBERGER-TREIMAN RELATION; LINEAR SIGMA-MODEL; ZWEIG-IIZUKA RULE; PSEUDOSCALAR MESONS; PROTON SCATTERING; CURRENT-ALGEBRA; U(1); PHOTOPRODUCTION; THRESHOLD SO - Nuclear Physics A 2002 ;703(1-2):306-326 6262 UI - 6301 AU - Nara C AU - Sakai T AU - Urrutia J AD - Tokai Univ, Res Inst Educ Dev, Shibuya Ku, Tokyo 1518677, JapanUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoNara, C, Tokai Univ, Res Inst Educ Dev, Shibuya Ku, 2-28-4 Tomigaya, Tokyo 1518677, Japan TI - Maximal number of edges in geometric graphs without convex polygons AB - A geometric graph G is a graph whose vertex set is a set P-n of n points on the plane in general position, and whose edges are straight line segments (which may cross) joining pairs of vertices of G. We say that G contains a convex r-gon if its vertex and edge sets contain, respectively, the vertices and edges of a convex polygon with r vertices. In this paper we study the following problem: Which is the largest number of edges that a geometric graph with n vertices may have in such a way that it does not contain a convex r-gon? We give sharp bounds for this problem. We also give some bounds for the following problem: Given a point set, how many edges can a geometric graph with vertex set P. have such that it does not contain a convex r-gon? A result of independent interest is also proved here, namely: Let P. be a set of n points in general position. Then there are always three concurrent lines such that each of the six wedges defined by the lines contains exactly [n/6] or [n/6] elements of P-n MH - Japan MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000188862800023 SO - Discrete and Computational Geometry 2002 ;2866():215-220 6263 UI - 9545 AU - Nares R AU - Ramirez J AU - Gutierrez-Alejandre A AU - Louis C AU - Klimova T AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Paris 06, CNRS, URA 1106, Lab React Surface, F-75252 Paris 05, FranceInst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Ni/H beta-zeolite catalysts prepared by deposition-precipitation AB - The deposition-precipitation (DP) method, which was extensively developed for the preparation of Ni/SiO2, is applied here to the preparation of Ni/Hbeta zeolite catalysts. The Ni/Hbeta samples prepared at different deposition-precipitation times (1-4 h) were characterized by BET, XRD, TPR, FTIR, SEM, and TEM. The results indicate that as in the case of the deposition-precipitation of Ni on silica of low surface area, for short DP times (=2 h), nickel hydroxide is the main Ni(II) phase deposited on Hbeta zeolite whereas, for longer DP times (3 and 4 h), the Ni(II) phase is a mixture of nickel hydroxide and 1:1 nickel phyllosilicate. The behavior of the OH groups of the Hbeta zeolite indicates that the Ni(II) phase species are formed mainly on the external surface of the zeolite. After reduction at 450degreesC, the samples contain well-dispersed Ni metal particles with sizes between 9.5 and 120 Angstrom and with average particle sizes between 29 and 44 Angstrom, depending on the DP time MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000179985100027 L2 - METAL-PARTICLE SIZE; NI(II) PHASE; NICKEL-OXIDE; MAS-NMR; SILICA; REDUCTION; SUPPORT; REDUCIBILITY; MECHANISM; LOCATION SO - Journal of Physical Chemistry B 2002 ;106(51):13287-13293 6264 UI - 9659 AU - Nares R AU - Ramirez J AU - Gutierrez-Alejandre A AU - Cuevas R AU - Louis C AU - Klimova T AD - UNAM, Fac Quim, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Paris 06, URA 1106 CNRS, Lab React Surface, F-75252 Paris 05, FranceInst Mexicano Petr, Mexico City 07730, DF, MexicoNares, R, UNAM, Fac Quim, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, Mexico TI - Ni/H beta-zeolite catalysts prepared by deposition-precipitation AB - In the preparation of Ni/Hbeta catalysts by the deposition-precipitation method (DP), nickel hydrosilicates are formed mainly but not exclusively in the external surface of the HP zeolite. The strong metal-support interaction induced by the DP preparation method prevents the Ni metal particles from sintering during the activation of the catalysts (calcination and reduction) and a homogeneous distribution of small nickel particles is obtained. The catalyst prepared by DP showed better catalytic activity in the hydrogenation of naphthalene than the catalyst prepared by cationic competitive exchange MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000179552800059 L2 - NI/SIO2 MATERIALS; NI(II) PHASE; SILICA; NICKEL; REDUCTION; SUPPORT; STATE; IONS SO - Scientific Bases for the Preparation of Heterogeneous Catalysts 2002 ;143():537-545 6265 UI - 10821 AU - Narvaez-Berthelemot N AU - Russell JM AU - Arvanitis R AU - Waast R AU - Gaillard J AD - Univ Nacl Autonoma Mexico, Ctr Univ Invest Bibliotecol, Mexico City 04510, DF, MexicoInt Sci Fdn, Stockholm, SwedenInst Rech Dev, LSS, Bondy, FranceNarvaez-Berthelemot, N, Apartado Postal 105-218, Mexico City, DF, Mexico TI - Science in Africa: An overview of mainstream scientific output AB - The total scientific output of mainstream articles for the 15 most productive African countries for the period 1991 to 1997 was 45,080, with South Africa and Egypt publishing 15,725 and 10,433, respectively. The productions of these two top ranked countries varied little from 1991-1997 while others such as the Maghreb countries increased between 75-102%. Total contributions were mainly in the fields of Clinical Medicine (36%), Biology (17%), Chemistry (14%), and Biomedical Research (12%). Papers in international collaboration were overriding in Biomedical Research, Biology, Earth and Space Science, and Physics. Institutions in the US were the principal collaborators followed closely by those in France MH - France MH - Mexico|Distrito Federal MH - Sweden PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Interdisciplinary Applications;Information Science & Library Science U5 - J;Article AV - English IS - 0138-9130 UR - ISI:000176415300005 L2 - INTERNATIONAL COLLABORATION; LATIN-AMERICA; PARTICIPATION SO - Scientometrics 2002 ;54(2):229-241 6266 UI - 10918 AU - Nassar AA AU - Valdes-Martinez J AU - Hernandez-Ortega S AU - West DX AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoEl Menoufia, Dept Chem, Shibin Al Kawm, EgyptUniv Washington, Dept Chem, Seattle, WA 98195, USAValdes-Martinez, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - 2-{[1-(2-Aminophenyl)ethylidene]hydrazino}-5-piperidyl-1,3,4-thiadiazole MH - Egypt MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 1600-5368 UR - ISI:000176271700070 L2 - 2-AMINOACETOPHENONE N(4)-SUBSTITUTED THIOSEMICARBAZONES; COMPLEXES SO - Acta Crystallographica Section E-Structure Reports Online 2002 ;58():O694-O695 6267 UI - 10268 AU - Naumis GG AU - Aragon JL AU - Torres M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, Qro, MexicoCSIC, Inst Fis Aplicada, E-28006 Madrid, SpainNaumis, GG, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Average lattice and the long-wave length behavior of quasicrystals AB - Using the generalized dual method, close analytical expressions for the coordinates of the quasiperiodic lattice are given. This allows to define the lattice as an average plus a fluctuation part. The average is a superposition of crystalline lattices, and the dynamical structure factor or the diffraction pattern of the quasiperiodic structure can be expressed in terms of the average plus the fluctuation part. The average lattice dominates the response for long-wave modes of a probe particle or field, which is relevant in some recent application of quasiperiodic structures. The method can be extended for quasiperiodic grids, and is a very efficient algorithm to perform calculations in quasicrystals. Finally, the present approach can be used to define a Brillouin zone without ambiguities in the reciprocal space. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000177932400046 L2 - quasicrystals;dynamic structure factor;average lattice;QUASI-CRYSTALS; UNIT-CELL SO - Journal of Alloys and Compounds 2002 ;342(1-2):210-212 6268 UI - 9413 AU - Navar J AU - Mendez E AU - Dale V AD - UANL, Fac Ciencias Forestales, Monterrey 67700, NL, MexicoOak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831, USANavar, J, UANL, Fac Ciencias Forestales, Km 145 Carretera Nacl Linares, Monterrey 67700, NL, Mexico TI - Estimating stand biomass in the Tamaulipan thornscrub of northeastern Mexico AB - This paper presents information on below and aboveground standing biomass measurements and estimates using quadrat attributes in the Tamaulipan thornscrub of northeastern Mexico. Biomass components (i.e., leaves, branches, stem, and roots) were measured in 55 (5 m x 5 m) quadrats across northeastern Mexico. Total aboveground standing biomass was estimated on a per ha basis using six equations from two additive procedures, and contrasted against two conventional sets of equations. The results indicated that total standing weighted biomass averages 60.31 +/- 12.24 Mg ha(-1), composed of leaf (2.51 +/- 0.47 Mg ha(-1)), branch (24.44 +/- 4.88 Mg ha(-1)), stem (9.80 +/- 2.62 Mg ha(-1)), and root (23.56 +/- 4.25 Mg ha(-1)) biomass. The additive equations developed in seemingly unrelated linear regression that use quadrat attributes provided unbiased biomass estimates within the range of precision reported by conventional procedures. The additive equations are recommended for use in estimating total stand biomass for several land management issues MH - Mexico|Nuevo Leon MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Forestry U5 - J;Article AV - English IS - 1286-4560 UR - ISI:000180346500002 L2 - seemingly unrelated linear regressions;FOREST INVENTORY DATA; BELOW-GROUND BIOMASS; ROOT BIOMASS; LEVEL; TREE SO - Annals of Forest Science 2002 ;59(8):813-821 6269 UI - 11674 AU - Navar J AU - Mendez J AU - Bryan RB AU - Kuhn NJ AD - UANL, Fac Ciencias Forestales, Linares 67700, NL, MexicoUniv Toronto, Soil Eros Lab, Toronto, ON M1C 1A4, CanadaNavar, J, UANL, Fac Ciencias Forestales, Linares 67700, NL, Mexico TI - The contribution of shrinkage cracks to bypass flow during simulated and natural rainfall experiments in northeastern Mexico AB - Understanding the spatial and temporal dynamics of desiccation cracks and related hydro-geomorphologic processes is a key component for the sustainable management of water resources in Vertisols. The contribution of shrinkage cracks to infiltration of runoff and sediments was studied during natural and simulated rainfall experiments in Vertisols of the semi-arid plains of northeastern Mexico during the summer of 1998. Surface runoff amounted to 10.7% of the total applied rainfall, but it increased from 2.3 to 18.3% during the first and last applied rainfall. Soil cracks partially filled with transported sediments in surface runoff, but never sealed by swelling or by sedimentation during the sprinkling of 180 mm of rainfall applied in three installments during I wk. However, cracks observed in 1999 closed during natural rainfalls with a total depth of 450 mm, distributed in 10 storms during 3 mo. The development of soil cracks and their contribution to promote short-circuit flow are highly variable processes in tine and space MH - Canada MH - Mexico|Nuevo Leon PB - OTTAWA: AGRICULTURAL INST CANADA RP - NOT IN FILE U3 - TC 3 U4 - Soil Science U5 - J;Article AV - English IS - 0008-4271 UR - ISI:000174219000007 L2 - dynamics of shrinkage cracks;irregular wetting fronts;SUBSURFACE FLOW; CLAY SOILS; MACROPORES; VERTISOL; WATER SO - Canadian Journal of Soil Science 2002 ;82(1):65-74 6270 UI - 11657 AU - Navarrete AG AU - Chaikina EI AU - Mendez ER AU - Leskova TA AD - Ctr Invest Cient & Educ Super, Ensenada, Baja California, MexicoRussian Acad Sci, Inst Spect, Troitsk 142092, Moscow Oblast, RussiaNavarrete, AG, Ctr Invest Cient & Educ Super, Ensenada, Baja California, Mexico TI - Experimental study of the reflectance of two-dimensional metal surfaces with a random roughness distribution AB - This paper presents an evaluation of three perturbation theories and the Kirchhoff approximation for calculating the reflectance (the intensity of the coherent component) of two-dimensional metallic surfaces with a random roughness distribution. The theoretical results are compared with experimental data obtained on typical samples. The samples were fabricated from photoresist, and their metallized surface profiles are a good match with a Gaussian correlation function and a Gaussian random process. The correlation distances of these surfaces range from approximately one-fifth to two wavelengths of the IR range used in the experiment. (C) 2002 Optical Society of America MH - Mexico|Baja California MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 1070-9762 UR - ISI:000174214900002 L2 - LIGHT-SCATTERING SO - Journal of Optical Technology 2002 ;69(2):71-76 6271 UI - 9488 AU - Navarrete M AU - Serrania F AU - Villagran-Muniz A AU - Bravo J AU - Guinovart R AU - Rodriguez R AD - Univ Nacl Autonoma Mexico, Secc Ing Mecan Term & Fluidos, Edificio 12, Inst Ingn, Mexico City 70472, DF, MexicoUniv Nacl Autonoma Mexico, Lab Fotofis, Ctr Instrumentos, Mexico City 04510, DF, MexicoUniv La Habana, Fac Matemat & Computac, Havana, CubaNavarrete, M, Univ Nacl Autonoma Mexico, Secc Ing Mecan Term & Fluidos, Edificio 12, Inst Ingn, Apartado Postal 70-472, Mexico City 70472, DF, Mexico TI - An experimental-numerical technique for evaluating the elastic constants of unidirectional laminates by the optoacoustic method: Comparison with some theoretical results AB - In the present article, the elastic constants for unidirectional transversely isotropic laminated composites are measured using the optoacoustic method. In this method, a laser pulse is used as a standard source of ultrasound. Different three-layer unidirectional laminated specimens with different volume fractions of reinforced graphite 716, Kevlar KS-400, and S-2 glass fibers were prepared. The engineering elastic constants (E-1, E-2, G(12),nu(12)) were obtained by means of the longitudinal velocity measured indifferent directions and then fitted in the stress-strain relations for a lamina that is stressed in nonprincipal x-y coordinates. The elastic constants determined with the experimental-numerical technique were compared to different theoretical models reported in the literature, such as Hill's modified model, Hashin and Hashin-Rosen's upper and lower bounds models, and the asymptotic homogenization method. The experimental results obtained in this work show good agreement with those mentioned above MH - Cuba MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Mechanics;Materials Science, Characterization & Testing;Materials Science, Composites U5 - J;Article AV - English IS - 1537-6532 UR - ISI:000180090400004 L2 - ANISOTROPIC MATERIALS; ALUMINUM; HOMOGENIZATION; COMPOSITES SO - Mechanics of Advanced Materials and Structures 2002 ;9(2):157-173 6272 UI - 11656 AU - Navarrete M AU - Gaudry A AU - Cabrera L AU - Martinez T AD - Natl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoCE Saclay, Lab Pierre Sue, F-91191 Gif Sur Yvette, FranceNavarrete, M, Natl Autonomous Univ Mexico, Fac Quim, Bldg D,CU, Mexico City 04510, DF, Mexico TI - Concentration of iodine traces in solution by filtering through activated carbon AB - The retention of iodine traces (ppb) was investigated in small activated carbon filters (50 mg) from solution at a yielding rate exclusively determined by pH. Retention is approximately 100% at pH values of 4-6, while no retention of iodine traces occurs after filtering them through an activated carbon filter from very acidic and basic solutions (pH values of 1 and 11, respectively) with 0% yielding rate. Since activated carbon is a very pure material this procedure may be an alternative method of the activation analysis of iodine traces in foodstuffs, because the half-life of L-128, formed by (n,gamma) reaction, is only 25 minutes. It does not allow either the sample to be placed readily in solution or the radioisotope to be separated after irradiation with the purpose of attaining maximal accuracy and sensitivity in this type of analysis MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000174193800020 L2 - SELENIUM; SAMPLES SO - Journal of Radioanalytical and Nuclear Chemistry 2002 ;251(2):297-298 6273 UI - 11430 AU - Navarro-Gonzalez R AU - Coll P AU - Aliev R AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Paris 12, CNRS, Lab Interuniv Syst Atmospher, Fac Sci & Technol, F-94010 Creteil, FranceUniv Paris 07, CNRS, Lab Interuniv Syst Atmospher, Fac Sci & Technol, F-94010 Creteil, FranceAliev, R, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Pyrolysis of gamma-irradiated bisphenol-A polycarbonate AB - A new approach to study the mechanism of radiation-induced degradation of polymeric materials based on the combined analysis of radiolytic gases and pyrolytic products from preirradiated polymers is proposed. Bisphenol-A polycarbonate (PC) was gamma-irradiated under vacuum in the dose range from 0.125 to 1.0 MGy followed by its flash pyrolysis under an inert atmosphere coupled to GC-FTIR-MS. Pyrolyzed PC at 750degreesC released mainly carbon dioxide, methane, benzene, toluene, phenol and 4-methylphenol. The yields of some of these products linearly decrease or increase with absorbed dose. On the basis of this behavior and combining our previous data on gas evolution, we infer two main pathways of PC radiation-induced scission with equal probabilities: (a) carbonate bond and (b) aliphatic-aromatic bond ruptures MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 0170-0839 UR - ISI:000174873000006 L2 - GAS CHROMATOGRAPHY; MASS-SPECTROMETRY; CROSS-LINKING; POLYMERS; RADIATION; FILMS SO - Polymer Bulletin 2002 ;48(1):43-51 6274 UI - 9298 AU - Navarro-Lopez EM AU - Sira-Ramirez H AU - Fossas-Colet E AD - Univ Politecn Catalunya, Inst Organitzacio & Control, E-08028 Barcelona, SpainCINVESTAV, IPN, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, MexicoFossas-Colet, E, Univ Politecn Catalunya, Inst Organitzacio & Control, Avda Diagonal 647,11 Planta, E-08028 Barcelona, Spain TI - Dissipativity and feedback dissipativity properties of general nonlinear discrete-time systems AB - The dissipativity of single-input single-output discrete-time systems which are nonlinear in the states and the control input is examined. Necessary conditions for the characterization of what is regarded as (V, s)-dissipative systems are given; in the special case of Quadratic Storage Supply lossless systems, necessary and sufficient conditions are proposed. The results obtained are compared with the ones already existing in the literature for losslessness, passivity and dissipativity cases. Sufficient conditions under which a class of non-affine discrete-time control systems can be rendered dissipative are derived. A procedure for dealing with feedback dissipativity and passivation problems is proposed, in addition to the extension of the Energy Shaping phis Damping Injection controller design method for the discrete-time case. A discrete-time model for the DC-to-DC buck converter is used as an example to illustrate the control scheme proposed MH - Mexico|Distrito Federal MH - Spain PB - PARIS: HERMES SCIENCE PUBLICATION RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0947-3580 UR - ISI:000180631900011 L2 - discrete-time systems;dissipativity;dissipativity-based control;feedback dissipativity;nonlinear systems;GLOBAL STABILIZATION; DYNAMICAL-SYSTEMS; INPUT-OUTPUT; PASSIVITY; EQUIVALENCE SO - European Journal of Control 2002 ;8(3):265-274 6275 UI - 10748 AU - Navarro JM AU - Galt D AU - Holechek J AU - McCormick J AU - Molinar F AD - BLM, Roswell Field Off, Roswell, NM 88201, USANew Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003, USAUSDI, Bur Land Management, Las Cruces Field Off, Las Cruces, NM 88005, USAAutonomous Univ Juarez, Sch Vet Med & Anim Sci, Chihuahua, MexicoNavarro, JM, BLM, Roswell Field Off, 2909 W 2nd St, Roswell, NM 88201 USA TI - Long-term impacts of livestock grazing on Chihuahuan Desert rangelands AB - Rangeland ecological condition was monitored over a 48 year period on 41 sites on Bureau of Land Management rangelands scattered across 6 counties in southwestern New Mexico. All sites were grazed by livestock during the study period. Sampling occurred in 1952, 1962, 1982, 1992, 1997, 1998, and 1999. A modified Parker 3 step method in conjunction with Dyksterhuis quantitative climax procedures were used to determine rangeland ecological condition. At the end of the 48 year study period (1952-1999), the average rangeland ecological condition score across study sites was the same (P > 0.05) as the beginning of the study (39% versus 41% remaining climax vegetation. respectively). Major changes (P > 0.05) in rangeland condition occurred within the study period due to annual fluctuations in precipitation. Ecological condition scores increased in the 1980s and early 1990s due to above average precipitation. However, drought in the early to mid 1950's and again in the mid to late 1990's caused rangeland condition scores to decline. At the end of the study (1997-1999), 38% of the sites were in late seral ecological condition, compared to an average of 25% in the 1952 to 1982 period. The amount of rangeland in late seral ecological condition increased while the amount of rangeland in mid seral and early seral condition decreased in the 1990s compared to the 1952-1962 period. The average percent cover of black grama (Bouteloua eriopoda Torr.) and tobosa (Hilaria mutica Buckley), the primary forage grasses in the Chihuahuan Desert, were the same (P > 0.05) in 1952 and 1999. Over the 48 year study period, the average cover of shrubs including honey mesquite (Prosopis glandulosa Torr.) showed no change (P > 0.05). However major increases in honey mesquite basal cover occurred on 1 site and creosotebush (Larria tridentata [Pursh] Nutt.) increased on another. Grazing intensity was evaluated during the last 3 years of study (1997, 1998, 1999). Overall grazing use of forage across sites and years averaged 34% or conservative. Our research shows controlled livestock grazing is sustainable on Chihuahuan Desert rangelands receiving from 26-35 cm annual precipitation MH - Mexico|Chihuahua MH - USA PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 0022-409X UR - ISI:000176819300012 L2 - rangeland condition;succession;drought;grazing management;plant ecology SO - Journal of Range Management 2002 ;55(4):400-405 6276 UI - 11606 AU - Navea C AU - Terrazas T AU - gado-Salinas A AU - Ramirez-Vallejo P AD - Colegio Postgrad Montecillo, Especialidad Bot, Montecillo 56230, Estado de Mexic, MexicoULA, Grp Fisiol & Post Cosecha, Dept Biol & Quim, Merida, VenezuelaUNAM, Inst Biol, Dept Bot, Mexico City 04150, DF, MexicoColegio Postgrad Montecillo, Especialidad Genet, Montecillo 56230, Estado de Mexic, MexicoTerrazas, T, Colegio Postgrad Montecillo, Especialidad Bot, Montecillo 56230, Estado de Mexic, Mexico TI - Foliar response of wild and domesticated Phaseolus vulgaris L. to water stress AB - It is surmised that domestication has reduced genetic variability in the common bean (Phaseolus vulgaris L.). However, little is known about leaf anatomy responses to water stress in wild or domesticated forms of P. vulgaris. In this study, anatomical variation was evaluated in watered and water stressed plants of wild and domesticated genotypes of P. vulgaris from Mexico, growing under greenhouse conditions. Five terminal leaflets of completely expanded leaves were used to evaluate leaf area (LA) and their middle-regions to evaluate leaf thickness (LT), and various anatomical features. Domesticated genotypes showed bigger LA than that of the wild ones; there was an effect due to the origin of materials, LA being bigger in genotypes from warm and humid lands that those from dry and temperate ones. No differences were detected in LT among materials; however, in domesticated plants the palisade parenchyma predominated over the spongy one, contrasting with the wild genotypes. Under drought conditions, stomatal abortion was observed in wild and domesticated genotypes, especially on the abaxial surface. We conclude that, in fact, there are contrasting differences in leaf anatomy among wild and domesticated forms of Mexican Phaseolus vulgaris. Results suggest that domestication not only favours the enlargement of the LA, but also an increase in palisade parenchyma, suggesting a divergence toward assimilation in domesticated forms, in contrast with a better internal gas diffusion in wild forms. Domestication seems to have accentuated stomatal abortion as means of a transpirational control mechanism to counteract the effects of drought MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000174482300002 L2 - drought;leaf anatomy;Phaseolus vulgaris;water stress;LEAF PHOTOSYNTHESIS; COMMON; ULTRASTRUCTURE; POPULATIONS; TRICHOMES; LANDRACES; FABACEAE SO - Genetic Resources and Crop Evolution 2002 ;49(2):125-132 6277 UI - 11471 AU - naya-Loyola MA AU - Allen LH AU - Rosado-Loria JL AU - Lopez-Romero P AD - Univ Calif Davis, Davis, CA 95616, USAUniv Autonoma Queretaro, Queretaro, MexicoInst Nacl Nutr, Mexico City, DF, Mexico TI - Vitamin B12 and folate status in vegetarian Mexican men MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533601531 SO - Faseb Journal 2002 ;16(4):A277-A277 6278 UI - 9827 AU - Naze Y AU - Hartwell JM AU - Stevens IR AU - Corcoran MF AU - Chu YH AU - Koenigsberger G AU - Moffat AFJ AU - Niemela VS AD - Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, BelgiumUniv Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, EnglandNASA, Goddard Space Flight Ctr, Univ Space Res Assoc, High Energy Astrophys Sci Archive Res Ctr, Greenbelt, MD 20771, USAUniv Illinois, Dept Astron, Urbana, IL 61801, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaUniv Nacl La Plata, Fac Ciencias Astron & Geofis, La Plata, ArgentinaNaze, Y, Univ Liege, Inst Astrophys & Geophys, Allee 6 Aout 17,Bat B5C, B-4000 Liege, Belgium TI - An X-ray investigation of the NGC 346 field in the Small Magellanic Cloud - I. The luminous blue variable HD 5980 and the NGC 346 cluster AB - We present results from a Chandra observation of the NGC 346 cluster. This cluster contains numerous massive stars and is responsible for the ionization of N66, the most luminous H II region and the largest star formation region in the SMC. In this first paper we will focus on the characteristics of the main objects of the field. The NGC 346 cluster itself shows only relatively faint X-ray emission (with L-X(unabs) similar to 1.5x10(34) ergs s(-1)), tightly correlated with the core of the cluster. In the field also lies HD 5980, a luminous blue variable star in a binary (or possibly a triple) system that is detected for the first time at X-ray energies. The star is X-ray bright, with an unabsorbed luminosity of L-X(unabs) similar to 1.7x10(34) ergs s(-1), but needs to be monitored further to investigate its X-ray variability over a complete 19 day orbital cycle. The high X-ray luminosity may be associated either with colliding winds in the binary system or with the 1994 eruption. HD 5980 is surrounded by a region of diffuse X-ray emission, which is a supernova remnant. While it may be only a chance alignment with HD 5980, such a spatial coincidence may indicate that the remnant is indeed related to this peculiar massive star MH - Argentina MH - Belgium MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179291400022 L2 - galaxies : star clusters;Magellanic Clouds;X-rays : individual (NGC 346, HD 5980);X-rays : stars;COLLIDING WINDS; ETA-CARINAE; BINARY HD-5980; MASSIVE STARS; O-STAR; SMC; REMNANTS; EMISSION; GALAXY; HOT SO - Astrophysical Journal 2002 ;580(1):225-234 6279 UI - 10158 AU - Necchi O AU - Jimenez JC AD - Sao Paulo State Univ, Dept Bot & Zool, BR-15054000 Sao Jose Do Rio Preto, SP, BrazilNatl Autonomous Univ Mexico, Fac Sci, Phycol Lab, Mexico City 04510, DF, MexicoNecchi, O, Sao Paulo State Univ, Dept Bot & Zool, Rua Cristovao,Colombo,2265, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil TI - Somatic meiosis and development of the juvenile gametophyte in members of the Batrachospermales sensu lato (Rhodophyta) AB - Seven populations (six in culture and one sampled directly from nature) of the freshwater red algal families Batrachospermaceae, Lemaneaceae and Thoreaceae were examined, involving three species of Batrachospermum, two of Paralemanea and one of Thorea. All 'Chantransia' stages ultimately produced juvenile gametophytes. The production of juvenile gametophytes in the three populations of Batrachospermum was generally most abundant at 15 degrees C and low irradiances (47-68 mumol photons m(-2) s(-1)). The most abundant gametophyte development in the Paralemanea species was observed at 10 degrees C and low or high irradiances (47-142 mumol photons m(-2) s(-1)). Gametophyte production in Thoreaceae occurred at higher temperatures (20 degrees C) and also at low irradiances. In species of the Batrachospermaceae and Lemaneaceae, the 'elimination cells' can be situated on the basal or suprabasal cell of the juvenile gametophyte, but the position is usually fixed in individual species. The presence and position of the elimination cells remain to be established in Thoreaceae. Our results corroborate a previous study suggesting that the position of elimination cells is such a constant feature that it is of potential diagnostic value at the generic or infrageneric (sectional or specific) level. The characteristics observed in the development of the juvenile gametophytes in species of Batrachospermaceae and Lemaneaceae essentially agreed with general descriptions in the previous studies. The characteristics of the Thoreaceae, with a distinctive developmental pattern of the juvenile gametophyte and the occurrence of two morphological types in the 'Chantransia' stage, support the proposal to elevate it to the ordinal level. Two remark-able observations in Batrachospermum species were the production of numerous juvenile gametophytes; from filaments of the same plant of the 'Chantransia' stage and the formation of a system of rhizoidal filaments or cell agglomeration of the juvenile gametophytes, which produced new gametophytes. These two characteristics potentially increase the formation of additional gametophytes under favourable conditions MH - Brazil MH - Mexico|Distrito Federal PB - LAWRENCE: INT PHYCOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0031-8884 UR - ISI:000178190400004 L2 - NORTH-AMERICA; SYSTEMATICS SO - Phycologia 2002 ;41(4):340-347 6280 UI - 11734 AU - Negron A AU - Ramos S AU - Blumenfeld AL AU - Pacheco G AU - Fripiat JJ AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Chem, Milwaukee, WI, USAUniv Wisconsin, Surface Studies Lab, Milwaukee, WI 53201, USAFripiat, JJ, 95 Montserrat,Casa 12,Col Los Reyes, Mexico City 04330, DF, Mexico TI - On the structural stability of montmorillonite submitted to heavy gamma-irradiation AB - The effect of heavy doses (up to 200 Mrad) of gamma-radiation on the short-range structural organization in montmorillonite was studied using infrared (IR) spectroscopy and solid-state high-resolution Al-27 and Si-29 nuclear magnetic resonance (NMR). No change attributable to irradiation was observed. A small variation in the water content was noted but it is not systematic. The results show that the montmorillonite structure can accumulate high doses of radiation without damage and therefore this clay is a suitable material for use in the safe disposal of radioactive waste MH - Mexico|Distrito Federal MH - USA PB - AURORA: CLAY MINERALS SOCIETY RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary;Mineralogy;Soil Science;Water Resources U5 - J;Article AV - English IS - 0009-8604 UR - ISI:000174132700006 L2 - gamma-radiation;smectite SO - Clays and Clay Minerals 2002 ;50(1):35-37 6281 UI - 10039 AU - Nesterov AI AU - de la Cruz FA AD - Univ Guadalajara, Dept Fis, CUCEI, Guadalajara 44420, Jalisco, MexicoLV Kirenskii Inst Phys, Krasnoyarsk 660036, RussiaUniv Guanajuato, Inst Fis, Guanajuato, MexicoNesterov, AI, Univ Guadalajara, Dept Fis, CUCEI, Av Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Magnetic monopoles with generalized quantization condition AB - Theory of pointlike magnetic monopole with an arbitrary magnetic charge is considered. It is shown that a proper description requires making use of nonunitary representations of the rotation group and the nonassociative generalization of the gauge group and fibre bundle theory. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Jalisco MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000178629100005 L2 - monopole;nonunitary representations;nonassociativity;gauge loop;quasigroups;QUANTUM-MECHANICS; DIRAC MONOPOLE; 3-COCYCLE; SPACE SO - Physics Letters A 2002 ;302(5-6):253-260 6282 UI - 11350 AU - Neufeld LM AU - Ramakrishnan U AU - Gonzalez-Cossio T AU - Rivera JA AU - Martorell R AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoEmory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322, USA TI - Effect of multiple micronutrient supplements during pregnancy on child size at 3 months: a randomized double blind clinical trial in semi-rural Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593901669 SO - Faseb Journal 2002 ;16(5):A1028-A1028 6283 UI - 12024 AU - Nevado R AU - Camarillo E AU - Bravo D AU - De Carcer IA AU - Lifante G AU - Jaque F AD - Univ Autonoma Madrid, Dept Fis Mat C4, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoJaque, F, Univ Autonoma Madrid, Dept Fis Aplicada, E-28049 Madrid, Spain TI - Induced changes in the refractive index of LiNbO3 crystals through Sc2O3 doping AB - The dependence of the ordinary (n(o)) and extraordinary (n(e)) refractive indices in congruent Sc2O3-doped LiNbO3 crystals are reported. The Sc3+ ion concentrations in the crystals were varied from 0% to 7%. It has been found that n(o) shows a clear singularity for a Sc3+ ion concentration of 3%. The experimental data of n(o) and n(e) are described by a generalised Sellmeier equation, which takes into account different Sc3+ ions sites location in the host matrix. Additionally, the role of the Sc2O3 content in the intrinsic defect distribution in LiNbO3 crystals has been studied by using Cr3+ ions as an EPR probe. (C)2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000173168200001 L2 - lithium niobate;refractive index;metal impurities SO - Materials Letters 2002 ;52(1-2):1-4 6284 UI - 11474 AU - Newburg DS AU - Chaturvedi P AU - Ruiz-Palacios GM AU - Altaye M AU - Guerrero MD AU - Meinzen-Derr JK AU - Morrow AL AD - Eunice Kennedy Shriver Ctr Mental Retardat Inc, Waltham, MA 02452, USAInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoChildrens Hosp, Med Ctr, Cincinnati, OH 45229, USA TI - High ratios of alpha 1,2-linked to alpha 1,3/4-linked fucosyloligosaccharides in human milk are associated with protection of breast-fed infants against diarrhea MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533603378 SO - Faseb Journal 2002 ;16(4):A608-A608 6285 UI - 10771 AU - Newkome GR AU - Cho TJ AU - Moorefield CN AU - Cush R AU - Russo PS AU - Godinez LA AU - Saunders MJ AU - Mohapatra P AD - Univ Akron, Dept Polymer Sci, Akron, OH 44325, USAUniv Akron, Dept Chem, Akron, OH 44325, USAChong Kun Dang Pharmaceut Co, Cheonan, South KoreaLouisiana State Univ, Dept Chem, Baton Rouge, LA 70803, USACtr Invest & Desarrollo Tecnol Electroquim, Pedro Escobedo 76700, Queretaro, MexicoUniv S Florida, Inst Biomol Sci, Tampa, FL 33620, USANewkome, GR, Univ Akron, Dept Polymer Sci, Akron, OH 44325, USA TI - Hexagonal terpyridine-ruthenium and -iron macrocyclic complexes by stepwise and self-assembly procedures AB - Methods for the self-assembly, as well as directed construction, of hexaruthenium metallomacrocycles employing bisterpyridine building blocks are described. Self-assembly is effected by a combination of equimolar mixtures of bismetalated and nonmetalated bis(terpyridinyl) monomers each possessing the requisite planar, 60degrees, terpyridine-metal-terpyridine connectivity. Stepwise synthesis of the identical hexamer is also discussed and used to aid in verification of the self-assembled product. Preparation and analysis of the related Fe-II metallomacrocycle are detailed and its TEM image confirms the hexameric structure. Characterization of the metalated products includes cyclic voltammetry along with the routine analytical techniques MH - Mexico|Queretaro MH - South Korea MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 52 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0947-6539 UR - ISI:000176724800015 L2 - iron;metallomacrocycles;metallocycle;N ligands;self-assembly;ruthenium;HYDRODYNAMIC RADII; CRYSTAL-STRUCTURE; CASCADE POLYMERS; MULTICOMPONENT; COORDINATION; DENDRIMERS; METALLOMACROMOLECULES; NANOARCHITECTURES; ELECTROCHEMISTRY; FUNCTIONALITIES SO - Chemistry-A European Journal 2002 ;8(13):2946-2954 6286 UI - 10269 AU - Newton AC AU - Allnutt TR AU - Dvorak WS AU - Del Castillo RF AU - Ennos RA AD - Univ Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JU, Midlothian, ScotlandN Carolina State Univ, Coll Nat Resources, Grinnells Lab, CAMCORE Cooperat, Raleigh, NC 27695, USAInst Politecn Nacl, CIIDIR Oaxaca, Xoxocotlan 71230, Oaxaca, MexicoNewton, AC, UNEP World Conservat Monitoring Ctr, 219 Huntingdon Rd, Cambridge CB3 0DL, England TI - Patterns of genetic variation in Pinus chiapensis, a threatened Mexican pine, detected by RAPD and mitochondrial DNA RFLP markers AB - Pinus chiapensis (Pinaceae) is a large conifer, endemic to central and southern Mexico and north-western Guatemala. In order to assess the extent of genetic variation within and between populations of this species, samples were obtained from throughout the natural range and analysed using random amplified polymorphic DNA (RAPD) and mtDNA RFLPs markers. Probes for the Coxl mitochondrial gene enabled two mitotypes to be observed. Populations from the eastern and western limit of the range of the species were fixed for one mitotype ('A'), whereas two populations distributed near the centre of the range were fixed for another ('B'). When the samples were screened with eight 10-mer RAPD primers, a total of 12 polymorphic bands were detected. The proportion of polymorphic bands was unusually low (24.5%) compared with other tree species. AMOVA analysis indicated that a significant proportion of the variation (P < 0.002) was distributed between populations; the extent of population differentiation detected (&UPhi;(st) = 0.226; G(ST) = 0.194) was exceptionally high for a pine species. Pair-wise comparison of &UPhi;(st) values derived from AMOVA indicated that populations were significantly (P < 0.05) different from each other in virtually every case. These results are interpreted in the context of the evolutionary history of the species, and the implications for its in- and ex situ conservation are discussed MH - United Kingdom MH - Mexico|Oaxaca MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 9 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-067X UR - ISI:000178026200004 L2 - white pine;Pinus strobus var. chiapensis;genetic variation;conservation;POPULATIONS; DIVERSITY; CONSERVATION; SPRUCE SO - Heredity 2002 ;89():191-198 6287 UI - 9703 AU - Ni FB AU - Cavazos T AU - Hughes MK AU - Comrie AC AU - Funkhouser G AD - Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721, USAUniv Arizona, Dept Geog & Reg Dev, Tucson, AZ 85721, USACICESE, Dept Oceanog Fis, Mexico City, DF, MexicoNi, FB, Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721, USA TI - Cool-season precipitation in the southwestern USA since AD 1000: Comparison of linear and nonlinear techniques for reconstruction AB - A 1000 year reconstruction of cool-season (November-April) precipitation was developed for each climate division in Arizona and New Mexico from a network of 19 tree-ring chronologies in the southwestern USA. Linear regression (LR) and artificial neural network (NN) models were used to identify the cool-season precipitation signal in tree rings. Using 1931-88 records, the stepwise LR model was cross-validated with a leave-one-out procedure and the NN was validated with a bootstrap technique. The final models were also independently validated using the 1896-1930 precipitation data. In most of the climate divisions, both techniques can successfully reconstruct dry and normal years, and the NN seems to capture large precipitation events and more variability better than the LR. In the 1000 year reconstructions. the NN also produces more distinctive wet events and more variability, whereas the LR produces more distinctive dry events. The 1000 year reconstructed precipitation from the two models shows several sustained dry and wet periods comparable to the 1950s drought (e.g. 16th century mega drought) and to the post-1976 wet period (e.g. 1330s, 1610s). The impact of extreme periods on the environment may be stronger during sudden reversals from dry to wet, which were not uncommon throughout the millennium, such as the 1610s wet interval that followed the 16th century mega drought. The instrumental records suggest that strong dry to wet precipitation reversals in the past 1000 years might be linked to strong shifts from cold to warm El Nino-southern oscillation events And from a negative to positive Pacific decadal oscillation. Copyright (C) 2002 Royal Meteorological Society MH - Mexico|Distrito Federal MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 19 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0899-8418 UR - ISI:000179579000004 L2 - tree-ring reconstructions;climate variables;droughts;wet periods;southwest;neural networks;DECADAL CLIMATE VARIABILITY; CONTIGUOUS UNITED-STATES; LARGE-SCALE CIRCULATION; WESTERN NORTH-AMERICA; DENDROCLIMATIC RECONSTRUCTIONS; NEURAL NETWORKS; SIERRA-NEVADA; TREE GROWTH; TEMPERATURE; RAINFALL SO - International Journal of Climatology 2002 ;22(13):1645-1662 6288 UI - 11392 AU - Ni T AU - Nagesha DK AU - Robles J AU - Materer NF AU - Mussig S AU - Kotov NA AD - Oklahoma State Univ, Dept Chem, Stillwater, OK 74078, USAUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoUniv Hamburg, Dept Chem, D-20146 Hamburg, GermanyKotov, NA, Oklahoma State Univ, Dept Chem, Stillwater, OK 74078, USA TI - CdS nanoparticles modified to chalcogen sites: New supramolecular complexes, butterfly bridging, and related optical effects AB - All present approaches to surface modification of nanoparticles (NPs) with organic ligands exploit metal (cadmium) sites as anchor points. To obtain efficient interaction of NP surface with p-orbitals of organic chromophores, we utilize the chalcogen (sulfur) sites on the NP surface. These sites present several advantages stemming from a stronger interaction of their atomic orbitals with both modifier and NP core. The chalcogen modification of CdS was achieved by using a mixed ligand (2,2'-bipyridyl-N,N)(malonato-O,O')-copper(II) monohydrate complex. The weak monodentate ligands (water) are replaced by a copper-sulfur bond during the modification reaction. The structure of the product was investigated by optical spectroscopy, electron spin resonance, and nuclear magnetic resonance. The modified NP can be described as a few tens (<40) of (2,2'-bipyridyl-N,N) (malonato-O,O') -copper units attached to the CdS core, Steady-state and time-resolved luminescence measurements, molecular orbital calculations, and UPS data indicate that delocalized surface states enveloping the surface chalcogen atoms of NP, transition metal, and p-orbitals of the bipyridine ligand are present in the synthesized species. The delocalized states are made possible due to the bridging of p-levels of sulfur and π-orbitals of bipyridine by butterfly d-orbitals of the transition metal atom placed between them. Chalcogen-modified NP can be considered as a new member of the family of supramolecular compounds based on transition metal complexes. Both NP and metal complex parts of the prepared supramolecules are very versatile structural units, and new molecular constructs of similar design, in which quantum effects of NPs are combined with optical properties of transition metal complexes, can be obtained with different NPs and metal complexes MH - Germany MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Multidisciplinary U5 - J;Review AV - English IS - 0002-7863 UR - ISI:000175014000042 L2 - QUANTUM-CONFINED NANOCLUSTERS; MLCT EXCITED-STATES; CADMIUM SELENIDE NANOCRYSTAL; SURFACE FUNCTIONALIZATION; SEMICONDUCTOR NANOCRYSTALS; ELECTRONIC DELOCALIZATION; GOLD NANOPARTICLES; PHOTOELECTRON-SPECTROSCOPY; RESOLVED EMISSION; SULFIDE CLUSTERS SO - Journal of the American Chemical Society 2002 ;124(15):3980-3992 6289 UI - 9881 AU - Nichita DV AU - Gomez S AU - Luna E AD - PETROM Inst Res & Technol ICPT, Campina, RomaniaUNAM, IIMAS, Mexico City, DF, MexicoNichita, DV, Inst Francais Petr, Div Chim & Phys Chim Appliquees, 1&4 Ave Bois Preau Rucil Malmaison, F-92852 Malmaison, France TI - Multiphase equilibria calculation by direct minimization of Gibbs free energy with a global optimization method AB - This paper presents a new method for multiphase equilibria calculation by direct minimization of the Gibbs free energy of multicomponent systems. The methods for multiphase equilibria calculation based on the equality of chemical potentials cannot guarantee the convergence to the correct solution since the problem is non-convex (with several local minima), and they can find only one for a given initial guess. The global optimization methods currently available are generally very expensive. A global optimization method called Tunneling, able to escape from local minima and saddle points is used here, and has shown to be able to find efficiently the global solution for all the hypothetical and real problems tested. The Tunneling method has two phases. In phase one, a local bounded optimization method is used to minimize the objective function. In phase two (tunnelization), either global optimality is ascertained, or a feasible initial estimate for a new minimization is generated. For the minimization step, a limited-memory quasi-Newton method is used. The calculation of multiphase equilibria is organized in a stepwise manner, combining phase stability analysis by minimization of the tangent plane distance function with phase splitting calculations. The problems addressed here are the vapor-liquid and liquid-liquid two-phase equilibria, three-phase vapor -liquid -liquid equilibria, and three-phase vapor -liquid -solid equilibria, for a variety of representative systems. The examples show the robustness of the proposed method even in the most difficult situations. The Tunneling method is found to be more efficient than other global optimization methods. The results showed the efficiency and reliability of the novel method for solving the multiphase equilibria and the global stability problems. Although we have used here a cubic equation of state model for Gibbs free energy, any other approach can be used, as the method is model independent. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Romania PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000179253200004 L2 - phase stability;tangent plane distance;multiphase equilibria;global optimization;equation of state;ISOTHERMAL FLASH PROBLEM; LIQUID-EQUILIBRIUM; STABILITY ANALYSIS; PHASE-STABILITY; VAPOR-LIQUID; MULTICOMPONENT MIXTURES; WAX PRECIPITATION; INTERVAL-ANALYSIS; EQUATION; STATE SO - Computers & Chemical Engineering 2002 ;26(12):1703-1724 6290 UI - 11468 AU - Nichita DV AU - Gomez S AU - Luna E AD - Univ Nacl Autonoma Mexico, Inst Appl Math & Syst, IIMAS, Mexico City 01000, DF, MexicoPetrom Inst Res & Technol, ICPT, Campina 2150, RomaniaNichita, DV, Inst Francais Petr, F-92500 Rueil Malmaison, France TI - Phase stability analysis with cubic equations of state by using a global optimization method AB - In this paper. we propose a new method for phase stability analysis with cubic equations of state by minimization of the tangent plane distance (TPD) function. A global optimization method called tunneling, able to escape from local minima and saddle points is used here. The tunneling method has two phases. In phase one, a local bounded optimization method is used to minimize the TPD function. In phase two (tunneling), either global optimality is ascertained. or a feasible initial estimate for a new minimization is generated. For the minimization step, a limited-memory quasi-Newton method is used. The tunneling method is used for the conventional approach, and for the reduced variables approach. In the latter case, the number of independent variables does not depend on the number of components in the mixture. The solution of the minimization of TPD function should be found in a space with a significantly reduced number of dimensions. The new method is used for testing phase stability for a variety of representative systems. The examples show the robustness of the method even in the most difficult situations. The proposed method is more efficient than other global optimization methods. Furthermore, in many cases, the reduced approach is faster than the conventional approach. The results showed the efficiency and reliability of the novel method for solving the global stability problem. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Romania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000174775600037 L2 - phase stability;tangent plane distance;multiphase equilibria;global optimization;equation of state;reduced variables;GIBBS FREE-ENERGY; MULTICOMPONENT MIXTURES; EQUILIBRIUM CALCULATIONS; LIQUID EQUILIBRIUM; INTERVAL-ANALYSIS; HYDROCARBON; FLASH; MINIMIZATION SO - Fluid Phase Equilibria 2002 ;194():411-437 6291 UI - 10344 AU - Nielsen K AU - Gall D AU - Bermudez R AU - Renteria T AU - Moreno F AU - Corral A AU - Monroy O AU - Monge F AU - Smith P AU - Widdison J AU - Mardrueno M AU - Calderon N AU - Guerrero R AU - Tinoco R AU - Osuna J AU - Kelly W AD - Agr Canada, Inst Anim Dis Res, Nepean, ON K2H 8P9, CanadaUniv Autonoma Baja California, Inst Invest Ciencia Vet, Unidad Lab Diagnost, Mexicali 21100, Baja California, MexicoNielsen, K, Agr Canada, Inst Anim Dis Res, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada TI - Field trial of the brucellosis fluorescence polarization assay AB - Fluorescence polarization assay (FPA) is a homogeneous technique which was applied to the serological diagnosis of bovine brucellosis. Because of its simplicity and because it may be performed very rapidly, it was an ideal test to adapt to field use. The FPA was used to test cattle on six dairy farms in Baja California, Mexico. Anticoagulated blood, serum, and milk were collected from each animal. The, anticoagulated blood was. tested immediately on the farm while serum and milk were tested subsequently in the laboratory. Cattle on one farm (n = 140) were thought not to be infected with Brucella abortus and the other farms were thought to have high prevalence of the infection. The whole blood FPA (FPA(bld)) did not detect antibody in any of the cattle on the first premise. This finding was confirmed using a number of other serological tests, including the buffered antigen plate agglutination test, the complement fixation test, the indirect and competitive enzyme immunoassays, and the FPA using serum and milk. Cattle on the other premises (n = 1122) were tested in a similar fashion. The sensitivity of the FPA(bld), relative to the serum FPA (considered the definitive test), was 99.1% and the relative specificity of the FPA(bld) was 99.6%. These results compared favourably with those obtained using the other serological tests MH - Canada MH - Mexico|Baja California PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemical Research Methods;Immunology;Medical Laboratory Technology U5 - J;Article AV - English IS - 1532-1819 UR - ISI:000177856700004 L2 - fluorescence polarization assay;field test;comparative serology;brucellosis;BOVINE BRUCELLOSIS; SEROLOGICAL ASSAYS; DIAGNOSIS; ABORTUS; VALIDATION; ANTIBODY SO - Journal of Immunoassay & Immunochemistry 2002 ;23(3):307-316 6292 UI - 10327 AU - Nieto-Barajas LE AU - Walker SG AD - Univ Bath, Bath BA2 7AY, Avon, EnglandNieto-Barajas, LE, ITAM, Dept Estadist, Rio Hondo 1, Mexico City 01780, DF, Mexico TI - Markov beta and gamma processes for modelling hazard rates AB - This paper generalizes the discrete time independent increment beta process of Hjort (1990), for modelling discrete failure times, and also generalizes the independent gamma process for modelling piecewise constant hazard rates (Walker and Mallick, 1997). The generalizations are from independent increment to Markov increment prior processes allowing the modelling of smoothness. We derive posterior distributions and undertake a full Bayesian analysis MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 11 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0303-6898 UR - ISI:000177785500005 L2 - Bayes non-parametrics;beta process;gamma process;Markov process;stationary process;survival analysis;BAYESIAN-ANALYSIS; GIBBS SAMPLER; SURVIVAL-DATA; INFERENCE SO - Scandinavian Journal of Statistics 2002 ;29(3):413-424 6293 UI - 10033 AU - Nieto-Sampedro M AU - Collazos-Castro JE AU - Taylor JS AU - Gudino-Cabrera G AU - Verdu-Navarro E AU - Pascual-Piedrola JI AU - Insausti-Serrano R AD - CSIC, Inst Cajal Neurobiol, Grp Plasticidad Neural, E-28002 Madrid, SpainHosp Nacl Paraplejicos, Unidad Neurol Expt, Toledo, OH, USAUniv Guadalajara, Dept Biol Celular & Mol, Jalisco, MexicoUniv Autonoma Barcelona, Grp Neuroplast & Regeneracio, E-08193 Barcelona, SpainServ Navarro Salud, Serv Urol, Unidad Regenerac Neural, Pamplona, SpainUniv Castilla La Mancha, Fac Med, Dept Salud, Albacete, Spain TI - Traumatic injuries to the central nervous system and their repair AB - Development Brain and spinal cord lesions have an increasing social and economic importance. Accidental trauma of various kinds is the main cause of mortality of children and young adults in developed countries. Only cardiac disease and cancer surpass the number of death caused by accidents and, examining the number of potential work years lost, CNS lesions surpass all other problems. Most brain and spinal cord injuries cause chronic incapacity and frequently occur to individuals under 45 years of age. Edema and other acute events can be efficiently treated and CNS lesions may not be mortal, but are incurable. Conclusion The final outcome of CNS injury depend on the area damaged and the extent of the lesion, but the best present therapies can offer is relief of the symptoms and rehabilitation. This review examines the present state of functional repair of experimental central nervous system trauma MH - Mexico|Jalisco MH - Spain MH - USA PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology U5 - J;Review AV - Spanish IS - 0210-0010 UR - ISI:000178636100010 L2 - brain;function recovery;injury;lesion repair;locomotion;neuronal death;sensorimotor recovery;spinal cord.;trauma;visceral function;voluntary movement;RAT SPINAL-CORD; PARASYMPATHETIC PREGANGLIONIC NEURONS; ENSHEATHING GLIA TRANSPLANTS; NEURITE OUTGROWTH INHIBITOR; DORSAL-ROOT AXONS; ESTROGEN-RECEPTOR IMMUNOREACTIVITY; PRIMARY AFFERENT-PROJECTIONS; FIBRILLARY ACIDIC PROTEIN; CELL-ADHESION MOLECULE; GROWTH-FACTOR RECEPTOR SO - Revista de Neurologia 2002 ;35(6):534-552 6294 UI - 10613 AU - Nieto-Sotelo J AU - Martinez LM AU - Ponce G AU - Cassab GI AU - Alagon A AU - Meeley RB AU - Ribaut JM AU - Yang RY AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Plant Mol Biol, Cuernavaca 62250, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Biostruct, Cuernavaca 62250, Morelos, MexicoPioneer HiBred Int Inc, Trait & Technol Dev, Johnston, IA 50310, USAInt Maiz & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoNieto-Sotelo, J, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Plant Mol Biol, Cuernavaca 62250, Morelos, Mexico TI - Maize HSP101 plays important roles in both induced and basal thermotolerance and primary root growth AB - HSP101 belongs to the ClpB protein subfamily whose members promote the renaturation of protein aggregates and are essential for the induction of thermotolerance. We found that maize HSP101 accumulated in mature kernels in the absence of heat stress. At optimal temperatures, HSP101 disappeared within the first 3 days after imbibition, although its levels increased in response to heat shock. In embryonic cells, HSP101 concentrated in the nucleus and in some nucleoli. Hsp101 maps near the umc132 and npi280 markers on chromosome 6. Five maize hsp101-m-::Mu1 alleles were isolated. Mutants were null for HSP101 and defective in both induced and basal thermotolerance. Moreover, during the first 3 days after imbibition, primary roots grew faster in the mutants at optimal temperature. Thus, HSP101 is a nucleus-localized protein that, in addition to its role in thermotolerance, negatively influences the growth rate of the primary root. HSP101 is dispensable for proper embryo and whole plant development in the absence of heat stress MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 24 U4 - Biochemistry & Molecular Biology;Plant Sciences;Cell Biology U5 - J;Article AV - English IS - 1040-4651 UR - ISI:000177065400015 L2 - QUANTITATIVE TRAIT LOCI; ABSCISIC-ACID CONCENTRATION; SHOCK PROTEIN COMPLEMENTS; HEAT-SHOCK; ACQUIRED THERMOTOLERANCE; TEMPERATURE STRESS; GRAIN-YIELD; ZEA-MAYS; GERMINATION; ARABIDOPSIS SO - Plant Cell 2002 ;14(7):1621-1633 6295 UI - 11775 AU - Nieves M AU - Voltolina D AU - Medina A AU - Pina P AU - Ruiz JL AD - UAS CIBNOR, Lab Microalgas, Ctr Invest Biol Noroeste, Mazatlan, Sinaloa, MexicoUniv Autonoma Sinaloa, Fac Ciencias Mar, Mazatlan, Sinaloa, MexicoUniv Cadiz, CASEM, Grp Invest Zeolitas Acuicultura, Cadiz 11510, SpainVoltolina, D, UAS CIBNOR, Lab Microalgas, Ctr Invest Biol Noroeste, POB 1132, Mazatlan, Sinaloa, Mexico TI - Zeolites and diatom growth AB - Zeolites are widely used in some Asiatic countries, as they are believed to improve water quality and selectively enhance diatom growth through silicon leaching. Culture experiments with the diatom Chaetoceros sp. in medium f, with no silicate, and enriched with two natural and three artificial zeolitic products, showed an enhancement of between 0.2 and 0.6 cell duplications, which cannot be as a result of higher silicate availability because solubility experiments showed that natural zeolites do not leach any silicon, and that the amounts released by the artificial products are too small to improve diatom growth MH - Mexico|Sinaloa MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000174013200008 L2 - Chaetoceros;growth;zeolites;zeolific silicon SO - Aquaculture Research 2002 ;33(1):75-79 6296 UI - 10245 AU - Niklas KJ AU - Molina-Freaner F AU - Tinoco-Ojanguren C AU - Paolillo DJ AD - Cornell Univ, Dept Plant Biol, Ithaca, NY 14853, USAUNAM, Inst Ecol, Hermosillo 83000, Sonora, MexicoNiklas, KJ, Cornell Univ, Dept Plant Biol, Ithaca, NY 14853, USA TI - The biomechanics of Pachycereus pringlei root systems AB - We report on the root system of the large columnar cactus species Pachycereus pringlei to explore the hypothesis that increasing plant size decreases the ability to resist wind-throw but increases the capacity to absorb and store nutrients in roots (i.e., plant size limits the performance of these functions and may shift the performance of one function in favor of another as size increases). Based on 18 plants differing in size, the root system is characterized by a broad and deep bayonet-like root central to a shallow and extensive lateral system of root elements bearing sinker roots near the stem base. All root types have a living secondary cortex and contain wood with a large volume fraction of ray tissues that increases toward the stem base. Wood stiffness and tensile strength are correlated negatively with the ray tissue volume fraction and thus decrease toward the stem base in lateral and bayonet roots. Calculations show that the ability of the bayonet and proximal lateral root elements to resist wind-throw decreases with increasing plant size, whereas the nutrient absorption/storage capacity of the total root system increases with plant size (ie, a size-dependent shift between these two root functions occurs) MH - Mexico|Sonora MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000178097900002 L2 - biomechanics;Cactaceae;plant anatomy roots;wind drag;wood;HYDRAULIC CONDUCTIVITY; TREE STABILITY; SITKA SPRUCE; ANCHORAGE; SOIL; WOOD; ARCHITECTURE; RESISTANCE; MECHANICS; RESPONSES SO - American Journal of Botany 2002 ;89(1):12-21 6297 UI - 10806 AU - Nishimura LS AU - Giron JA AU - Nunes SL AU - Guth BEC AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Puebla, MexicoUniv Fed Sao Paulo, Escola Paulista Med, UNIFESP, Dept Microbiol Imunol & Parasitol, Sao Paulo, BrazilGiron, JA, Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Edificio 76 Complejo Ciencas,Ciudad Univ, Puebla, Mexico TI - Prevalence of enterotoxigenic Escherichia coli strains harboring the longus pilus gene in Brazil AB - The longus type IV pilus gene (IngA) was highly prevalent (32.8%) among Brazilian enterotoxigenic Escherichia coli strains producing both heat-labile and heat-stable enterotoxins and bearing the CFA/I, CS1CS3, or CS6 antigen. Furthermore, IngA was more often found in strains isolated from children with diarrhea than in strains isolated from children without diarrhea MH - Brazil MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000176605800045 L2 - COLONIZATION FACTOR ANTIGENS; SAO-PAULO; MONOCLONAL-ANTIBODIES; STRUCTURAL GENE; IV PILUS; CHILDREN; DIARRHEA; TOXIN; BANGLADESH; INFECTIONS SO - Journal of Clinical Microbiology 2002 ;40(7):2606-2608 6298 UI - 9699 AU - Noa M AU - Perez N AU - Gutierrez R AU - Escobar I AU - Diaz G AU - Vega S AU - Prado G AU - Urban G AD - Univ Autonoma Metropolitana Xochimilco, Dept Prod Agricola & Anim, Instrumental Anal Lab, Mexico City 04960, DF, MexicoUniv Agraria La Habana, Fac Med Vet Autopista Nacl & Carretera Tapaste, Fac Med Vet, Havana, CubaPerez, N, Univ Autonoma Metropolitana Xochimilco, Dept Prod Agricola & Anim, Instrumental Anal Lab, Calzada Hueso 1100, Mexico City 04960, DF, Mexico TI - Stability of sulfonamides, nitrofurans, and chloramphenicol residues in preserved raw milk samples measured by liquid chromatography AB - A stability study was made of 10 antimicrobials: sulfonamides, 3 nitrofurans, and chloramphenicol residues in raw milk samples preserved with 0.1% potassium dichromate (K2Cr2O7) and 0.05% mercuric bichloride (HgCl2) during cold storage for 7 days. Preserved milk samples fortified with 50 ppb of each antimicrobial were analyzed by liquid chromatography (modified AOAC Method 993.32). Drugs were extracted with chloroform-acetone after solvent evaporation residues were dissolved with aqueous sodium acetate buffer solution (0.02M, pH 4.8), and fat was removed with hexane. Sulfonamides and chloramphenicol were detected at 275 nm (UV) by using a gradient system of sodium acetate buffer solution-acetonitrile starting at 95 + 5 (v/v) and finishing at 80 + 20 (v/v). Nitrofurans were detected at 375 nm (UV) isocratically with sodium acetate buffer solution-acetonitrile (80 + 20, v/v). Residues stability was measured through recovery data. Sulfamethoxazole, sulfachloropyridazine, nitrofurazone, furazolidone, and furaltadone residues remained stable in the presence of either preservative for 7 days. Sulfamethazine and chloramphenicol were not affected by K2Cr2O7, but had significant losses (p <0.05) when HgCl2 was used: 26.2 and 13.4%, respectively. Average recoveries of sulfamonomethoxine, sulfamerazine, and sulfathiazole significantly decreased by Day 7, with losses of 17.1, 17.2, and 23.2% for K2Cr2O7, and 23.3, 20.7, and 48.0% for HgCl2, respectively. During 5 days of cold storage all antimicrobials tested, except sulfathiazole, remained stable in milk samples preserved with 0.1% K2Cr2O7 or 0.05% HgCl2 MH - Cuba MH - Mexico|Distrito Federal PB - GAITHERSBURG: AOAC INTERNATIONAL RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Analytical;Food Science & Technology U5 - J;Article AV - English IS - 1060-3271 UR - ISI:000179524700027 SO - Journal of Aoac International 2002 ;85(6):1415-1419 6299 UI - 10551 AU - Nobel PS AU - Pimienta-Barrios E AU - Hernandez JZ AU - Ramirez-Hernandez BC AD - Univ Calif Los Angeles, Dept Organism Biol Ecol & Evol, Los Angeles, CA 90095, USAUniv Guadalajara, Dept Ecol, Zapopan 45110, Jalisco, MexicoNobel, PS, Univ Calif Los Angeles, Dept Organism Biol Ecol & Evol, Los Angeles, CA 90095 USA TI - Historical aspects and net CO2 uptake for cultivated Crassulacean acid metabolism plants in Mexico AB - Use of Crassulacean acid metabolism (CAM) plants in Mexico and worldwide has a long history, but the morphological and photosynthetic aspects of these plants have only been considered recently. Emphasis in this article is on the daily net CO, uptake ability by three species of agaves and three species of cacti that are currently extensively cultivated in Mexico for beverages, food, fodder, and forage - Agave mapisaga, A. salmiana, A. tequilana, Opuntia ficus-indica, O. robusta and Stenocereus queretaroensis. Data under controlled conditions are used to help interpret seasonal net CO2 uptake patterns observed in the field. These CAM plants have instantaneous and total daily net CO2 uptake values similar to those for highly productive C-3 and C-4 crops. The future increase in the cultivated area of CAM plants will have both agronomical and ecological ramifications because of the ability of these plants to endure prolonged drought and to sequester carbon during extended dry periods when few C-3 and C-4 crops and non-CAM native plants can fix atmospheric CO2 MH - USA MH - Mexico|Jalisco PB - WARWICK: ASSOC APPLIED BIOLOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0003-4746 UR - ISI:000177249600004 L2 - Agave;cactus;CO2 uptake;Crassulacean acid metabolism;Mexico;morphology;Opuntia;stenocereus;OPUNTIA-FICUS-INDICA; AGAVE-TEQUILANA; ELEVATED CO2; STENOCEREUS-QUERETAROENSIS; ENVIRONMENTAL RESPONSES; ATMOSPHERIC CO2; WATER RELATIONS; GAS-EXCHANGE; CAM PLANTS; GROWTH SO - Annals of Applied Biology 2002 ;140(2):133-142 6300 UI - 10313 AU - Nocetti FG AU - Stojmenovic I AU - Zhang JY AD - Univ Nacl Autonoma Mexico, DISCA, IIMAS, Mexico City 04510, DF, MexicoUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaUniv Alabama, Dept Comp Sci, Tuscaloosa, AL 35487, USANocetti, FG, Univ Nacl Autonoma Mexico, DISCA, IIMAS, Circuito Escolar SN,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Addressing and routing in hexagonal networks with applications for tracking mobile users and connection rerouting in cellular networks AB - Nodes in a hexagonal network are placed at the vertices of a regular triangular tessellation, so that each node has up to six neighbors. The network is proposed as an alternative interconnection network to mesh connected computer (with nodes serving as processors) and is used also to model cellular networks where nodes are base stations. In this paper, we propose a suitable addressing scheme for nodes (with two variants), derive a formula for distance between nodes, and present a very simple and elegant routing algorithm. This addressing scheme and corresponding routing algorithm for hexagonal interconnection are considerably simpler than previously proposed solutions. We then apply the addressing scheme for solving two problems in cellular networks. With the new scheme, the distance between the new and old cell to which a mobile phone user is connected can be easily determined and coded with three integers, one of them being zero. Further, in order to minimize the wireless cost of tracking mobile users, we propose hexagonal cell identification codes containing three, four, or six bits, respectively, to implement a distance based tracking strategy. These schemes do not have errors in determining cell distance in existing hexagonal based cellular networks, which is not the case with recently proposed 3 bit cell identification codes based on an artificial square mesh placed over a hexagonal network (moreover, the existing mesh schemes fail to address the diagonal moves that may cause additional unrecoverable errors). Our schemes provide efficient implementation of distance and movement based tracking schemes in cellular networks, by providing information generally not available to the user, and means to manipulate it for accurate cell distance determination. Another application is for connection rerouting in cellular networks during a path extension process. In a path extension scheme, the path for ongoing calls is extended from the old base station to a new one using the link between neighboring base stations. If the path is extended several times due to mobility, our scheme provides an elegant way to reroute the connection from the latest base station to the base station of original connection and, therefore, minimize the length of extended path MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 11 U4 - Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1045-9219 UR - ISI:000177895800009 L2 - cellular networks;hexagonal networks;routing;location management;GUARANTEED DELIVERY; WIRELESS NETWORKS; PCS NETWORKS; MANAGEMENT; ALGORITHMS; HARTS SO - Ieee Transactions on Parallel and Distributed Systems 2002 ;13(9):963-971 6301 UI - 12016 AU - Noel Y AU - Zicovich-Wilson CM AU - Civalleri B AU - D'Arco P AU - Dovesi R AD - Univ Turin, Dept CIFM, I-10125 Turin, ItalyUniv Paris 06, Lab PMMP, F-75252 Paris 05, FranceUnita INFM Torino, I-10125 Turin, ItalyUniv Autonoma Estado Morelos, Dept Fis, Cuernavaca 62210, Morelos, MexicoDovesi, R, Univ Turin, Dept CIFM, Via Giuria 5, I-10125 Turin, Italy TI - Polarization properties of ZnO and BeO: An ab initio study through the Berry phase and Wannier functions approaches AB - The spontaneous polarization and the piezoelectric constants of ZnO and BeO are calculated at an ab initio quantum-mechanical level by using two alternative strategies, namely, through the Berry phase scheme applied to delocalized crystalline orbitals, and through the definition of well-localized Wannier functions. The two sets of results, obtained in the same computational conditions (both schemes are implemented in the CRYSTAL code) compare extremely well, and are in good agreement with available experimental data MH - France MH - Italy MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000173186000057 L2 - ELECTRON CORRELATION; LOCALIZED ORBITALS; BERYLLIUM-OXIDE; HARTREE-FOCK; PIEZOELECTRICITY; CONSTANTS; BOND SO - Physical Review B 2002 ;65(1): 6302 UI - 10291 AU - Noguera FA AU - Zaragoza-Caballero S AU - Chemsak JA AU - Rodriguez-Palafox A AU - Ramirez E AU - Gonzalez-Soriano E AU - Ayala R AD - IBUNAM, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoIBUNAM, Dept Zool, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Essig Museum Entomol, Berkeley, CA 94720, USANoguera, FA, IBUNAM, Estac Biol Chamela, Apartado Postal 21, San Patricio 48980, Jalisco, Mexico TI - Diversity of the family Cerambycidae (Coleoptera) of the tropical dry forest of Mexico, I. Sierra de Huautla, Morelos AB - The cerambyeid fauna of the tropical dry forest of the Sierra of Huautla, Morelos, Mexico, is described. Collections were made between November 1995 and October 1996, during 5 d of every month, and collection methods included light trapping, Malaise trapping, and netting, sweeping and beating. A total of 153 species, 91 genera, 32 tribes, and four subfamilies was recorded. The subfamily with the greatest number of species was Cerambycinae with 78, followed by Lamiinae with 67, Lepturinae with six, and Prioninae with two. The tribes with the largest number of genera and species were Trachyderini with 13 and 17 and Acanthocini with 12 and 23. The genera with the most species were Phaea Newman with 11 and Lepturges Bates with eight. Estimated richness values using the nonparametric estimators ICE and Chao 2 were 251 and 241, respectively. A few species were very abundant, but many were represented by only a few individuals. The diversity value calculated with the Shannon Index over the entire year was 3.86. Species richness and abundance varied with time, with the highest values recorded in the rainy season and lowest values in the dry season. The fauna was more similar to the fauna of Chamela, Jalisco, than to El Aguacero, Chiapas, and consists of 65% species endemic to Mexico MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000178032700014 L2 - Cerambycidae;tropical dry forest;Mexico;richness;abundance SO - Annals of the Entomological Society of America 2002 ;95(5):617-627 6303 UI - 10474 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Yokosuka 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoKyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Hashirimizu, Yokosuka 2398686, Japan TI - Graviton correlator and metric perturbations in a de Sitter brane-world AB - We consider a de Sitter brane-world motivated by the dS/conformal field theory (CFT) correspondence where both the bulk and brane are de Sitter spaces. The brane tension is fixed by holographic RG. The 4D effective action for metric perturbations and 4D graviton correlator are explicitly found. The induced values of cosmological and Newton constants are calculated. The short distance behavior of the graviton correlator (when no brane matter presents) turns out to be significantly stronger than in the case of general relativity. It is shown that quantum brane CFT gives the dominant contribution to the graviton correlator on small scales such as in the brane new world scenario MH - Japan MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000177285600032 L2 - INFLATION; SPACES; TENSOR SO - Physical Review D 2002 ;66(2): 6304 UI - 11200 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanTomsk State Pedag Univ, Tomsk, RussiaUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Asymptotically de Sitter dilatonic spacetime, holographic RG flow and conformal anomaly from (dilatonic) dS/CFT correspondence AB - The number of asymptotically de Sitter (non-singular) solutions of 5d dilatonic gravity with positive cosmological constant is found. These solutions are similar to the previously known asymptotically AdS spaces where dilaton may generate the singularity. Using these solutions the consistent c-function is proposed in the same way as in AdS/CFT. The consistency of RG flow gives further support for dS/CFT correspondence. From holographic RG flow equations we calculate the holographic 4d conformal anomaly with dilatonic contributions. This conformal anomaly turns out to be the same as in AdS/CFT correspondence. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000175170400018 L2 - HIGHER-DERIVATIVE GRAVITY; ADS/CFT CORRESPONDENCE; GAUGED SUPERGRAVITY; DIMENSIONS SO - Physics Letters B 2002 ;531(1-2):143-151 6305 UI - 11590 AU - Nojiri S AU - Odintsov SD AD - Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, JapanTomsk State Pedag Univ, Tomsk, RussiaUniv Guanajuato, Inst Fis, Leon, Gto, MexicoNojiri, S, Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan TI - Wilson loop and dS/CFT correspondence AB - We calculate Wilson loop (quark-antiquark potential) in dS/CFT correspondence. The brane-world model is considered where bulk is two 5d Euclidean de Sitter spaces and boundary (brane) is 4d de Sitter one. Starting from the Nambu-Goto action, the calculation of the effective tension (average energy) is presented. Unlike to the case of supergravity calculation of Wilson loop in AdS/CFT setup, there is no need to regularize the Nambu-Goto action (the volume of de Sitter space is finite). it turns out that at sufficiently small curvature of 5d background the energy (potential) is positive and linear on the distance between quark and antiquark what indicates to the possibility of confinement. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000174402400021 L2 - WORLD SO - Physics Letters B 2002 ;528(1-2):169-174 6306 UI - 11931 AU - Nojiri S AU - Odintsov SD AU - Ogushi S AD - Natl Def Acad, Dept Appl Phys, Hashirimizu Yokosuka 2398686, JapanUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoKyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, JapanNojiri, S, Natl Def Acad, Dept Appl Phys, Hashirimizu Yokosuka 2398686, Japan TI - Cosmological and black hole brane-world universes in higher derivative gravity AB - A general model of multidimensional R 2 gravity including a Riemann tensor square term (non-zero c case) is considered. The number of brane-worlds in such a model is constructed (mainly in five dimensions) and their properties are discussed. The thermodynamics of a Schwarzschild-anti-deSitter (S-AdS) BH (with boundary) is presented when perturbation on c is used. The entropy, free energy, and energy are calculated. For a nonzero c the entropy (energy) is not proportional to the area (mass). The equation of motion of the brane in a BH background is presented as a FRW equation. Using a dual CFT description it is shown that the dual field theory is not a conformal one when c is riot zero. In this case the holographic entropy does not coincide with the BH entropy (they coincide for Einstein gravity or c=0 HD gravity where the AdS/CFT description is well applied). An asymmetrically warped background (an analogue of a charged AdS BH) where Lorentz invariance violation occurs is found. The cosmological 4D dS brane connecting two dS bulk spaces is formulated in terms of the parameters of R 2 gravity. Within the proposed dS/CFT correspondence the holographic conformal anomaly from five-dimensional higher derivative gravity in a de Sitter background is evaluated MH - Japan MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 81 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Review AV - English IS - 0556-2821 UR - ISI:000173402500036 L2 - HOLOGRAPHIC RENORMALIZATION-GROUP; PROBING F-THEORY; DE-SITTER SPACE; ADS/CFT CORRESPONDENCE; EXTRA DIMENSION; DESITTER SPACE; STRING THEORY; DOMAIN-WALLS; GAUGE-THEORY; ENTROPY SO - Physical Review D 2002 ;65(2): 6307 UI - 11084 AU - Nolasco G AU - Sequeira Z AU - Soares C AU - Mansinho A AU - Bailey AM AU - Niblett CL AD - Univ Algarve, FERN, P-8000 Faro, PortugalCINVESTAV IPN, Dept Ingn Genet Plantas, Irapuato, MexicoUniv Florida, Dept Hort Sci, Gainesville, FL 32611, USANolasco, G, Univ Algarve, FERN, Campus Gambelas, P-8000 Faro, Portugal TI - Asymmetric PCR ELISA: Increased sensitivity and reduced costs for the detection of plant viruses AB - PCR ELISA is the immunodetection of the products of a polymerase chain reaction (PCR). It is effective for detecting and differentiating plant viral nucleic acids, but as currently performed, it is laborious and expensive. The procedure has been modified and simplified by using asymmetric PCR. This eliminated the need to denature and neutralize samples prior to hybridization. It also increased the relative concentration of the target DNA species, making PCR ELISA more sensitive than TaqMan(TM), a fluorescence-based detection method. Reducing the reaction volumes to half and the concentration of the dNTPs and the digoxigenin label by tenfold significantly reduced the costs of PCR ELISA without reducing its sensitivity. The usefulness of these modifications was demonstrated for the detection of Citrus tristeza virus and Rupestris stem pitting-associated virus. We expect that with only minor modifications asymmetric PCR ELISA could be used effectively for the detection of most nucleic acid molecules of interest MH - Mexico|Guanajuato MH - Portugal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0929-1873 UR - ISI:000175803500002 L2 - asymmetric PCR;CTV;nucleic acids detection;RSPaV;RT-PCR ELISA;PITTING ASSOCIATED VIRUS-1; ASSAY SO - European Journal of Plant Pathology 2002 ;108(4):293-298 6308 UI - 11751 AU - Nouais D AU - Boetti N AU - Bonvicini V AU - Cerello P AU - Giubellino P AU - Hernandez-Montoya R AU - Kolojvari A AU - Mazza G AU - Nissinen J AU - Rashevsky A AU - Rivetti A AU - Tosello F AU - Vacchi A AD - Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyIst Nazl Fis Nucl, Sez Trieste, Trieste, ItalyUniv Jyvaskyla, Jyvaskyla, FinlandPolitecn Turin, Turin, ItalyCINVESTAV, Mexico City 14000, DF, MexicoCyclotron Lab, St Petersburg, RussiaCERN, Geneva, SwitzerlandNouais, D, Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy TI - Beam test results of a drift velocity monitoring system for silicon drift detectors AB - We report results on drift velocity monitoring using MOS charge injectors in silicon drift detectors obtained in beam test conditions. The correction of velocity variations as small as 0.03% caused by temperature variations of the order of 0.04 K allowed to get an average space resolution along all the drift path of 28 mum. Preliminary result demonstrating the possibility to correct for temperature gradients along the anode axis are also presented. (C) 2002 Elsevier Science B.V. All rights reserved MH - Finland MH - Italy MH - Mexico|Distrito Federal MH - Russia MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000173886100019 L2 - position sensitive detector;silicon detector;drift detector;drift velocity calibration;MOS charge injector SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;477(1-3):99-103 6309 UI - 9738 AU - Nowakowski M AD - Univ Guanajuato, Inst Fis, Guanajuato, MexicoUniv Los Andes, Dept Fis, Bogota, ColombiaNowakowski, M, Univ Guanajuato, Inst Fis, Apdo Postal E-143, Guanajuato, Mexico TI - Quantum instability for mixed states AB - The analysis of the time evolution of unstable states which are linear superposition of other, observable, states can, in principle, be carried out in two distinct, non-equivalent ways. One of the methods, usually employed for the neutral kaon system, combines the mixing and instability into one single step which then results in unconventional properties of the mass-eigenstates. An alternative method is to remain within the framework of a Lagrangian formalism and to perform the mixing prior to the instability analysis, Staying close to the K-0-(K) over bar (0) system, we compare both methods pointing out some of their shortcomings and advantages MH - Colombia MH - Mexico|Guanajuato PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000179483000002 L2 - CP-violation;instability;neutral kaons;CP-VIOLATION; NONCONSERVATION; INTERFERENCE; EVOLUTION; DECAYS; PAST; KAON SO - Modern Physics Letters A 2002 ;17(31):2039-2048 6310 UI - 11735 AU - Nozdrachev AD AU - Jimenez B AU - Morales MA AU - Fateev MM AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular, Mexico City 04510, DF, MexicoSt Petersburg State Univ, Dept Physiol, St Petersburg, RussiaMed State Acad, Dept Normal Physiol, Yaroslavl, RussiaMorales, MA, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular, Apartado Postal 70-221, Mexico City 04510, DF, Mexico TI - Neuronal organization and cell interactions of the cat stellate ganglion AB - The functional structure of the cat stellate ganglion (SG) and, in particular, its extra- and intraganglionic connections and neuronal organization, were investigated using histochemical, immunohistochemical, morphological and histological methods. Retrograde axonal transport of horseradish peroxidase was used to determine most of the extraganglionic interactions. Of the targets tested, the most extensive efferent connections of the SG were with the sternocleidomastoid muscle, trachea, esophagus and heart. Neurons of the SG also send a small number of postganglionic efferents to the thyroid and stomach. Furthermore, ganglion cells send axons to the spinal ganglia. Several afferent connections of the SG were determined. Sympathetic preganglionic neurons of segments C8-T10 of the spinal cord, sensory neurons of C8-T9 spinal ganglia, intramural ganglia of the thoracic viscera and the reticular formation of the medulla oblongata send their axons to the SG. Intraganglionic interactions of interneurons with principal ganglionic cells were assumed to occur, based on the presence of interneurons immunoreactive to GABA and substance P. GABA- and substance P-immunoreactive fibers located around a small number of postganglionic neurons were also identified. Morphological study revealed asymmetry between the left and right ganglia: the right ganglion is larger than the left and contains more cells. This asymmetry was also reflected in basic structural parameters of neurons, such as average neuronal area and average diameter of cell somata. The present data has been used to develop a scheme for the basic inter- and intraneuronal connections of the cat SG. This ganglion is a true nervous center, with postganglionic neurons, some of which might be performing sensory functions, and interneurons. The ganglion is connected not only with the spinal cord and spinal ganglia, but also with neurons of the intramural ganglia and, by direct links, with efferent neurons of the medulla oblongata. Thus, the SG may play an essential role in viscera-visceral reflexes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Neurosciences U5 - J;Article AV - English IS - 1566-0702 UR - ISI:000174043900005 L2 - sympathetic nervous system;morphology;morphometry;neuron location;efferent and afferent connections;SUPERIOR CERVICAL-GANGLION; SYMPATHETIC PREGANGLIONIC NEURONS; INFERIOR MESENTERIC GANGLION; GENE-RELATED PEPTIDE; SPINAL-CORD; GUINEA-PIG; HORSERADISH-PEROXIDASE; AUTONOMIC GANGLIA; AFFERENT-FIBERS; SENSORY NEURONS SO - Autonomic Neuroscience-Basic & Clinical 2002 ;95(1-2):43-56 6311 UI - 11098 AU - O'Dell CR AU - Balick B AU - Hajian AR AU - Henney WJ AU - Burkert A AD - Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAUniv Washington, Dept Astron, Seattle, WA 98195, USAUSN Observ, Washington, DC 20392, USAUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoMax Planck Inst Astron, D-69117 Heidelberg, GermanyO'Dell, CR, Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA TI - Knots in nearby planetary nebulae AB - HST emission-line images of five of the arguably closest planetary nebulae have shown that there is a progression of characteristics of their knots. This progression begins with dark tangential structures showing no alignment with the central star and location near the main ionization front. At the end of the progression in the largest nebulae, the knots are located throughout much of the ionized zone, where they are photoionized on the side facing the central star and accompanied by long tails well aligned radially. This modi cation of characteristics is what would be expected if the knots were formed near or outside the main ionization front, obtaining densities high enough to lead to their being only partially ionized as they are fully illuminated by the Lyman continuum (Lyc) radiation field. Their expansion velocities must be lower than that of the main body of the nebular shell. Their forms are altered by exposure to the radiation field from the star, although it is not clear as to the relative role of radiation pressure acting on the dust component vis-a-vis ionization shadowing. The one object that does not fit into this sequence is NGC 2392, which is the most complex nebula in our sample. In this case the inner part of the nebula is composed of a series of loops of material, some being ionization bounded, which cover only a small fraction of the area illuminated by the star. This complex structure may be what gives rise to the large variations in electron temperature inferred from low spatial resolution observations. Cometary-form knots are seen in the outer part of this object, with these objects closely resembling those found in the largest nebula in our sample, NGC 7293 MH - Germany MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 31 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000175830300027 L2 - planetary nebulae : individual (NGC 2392, NGC 6720, NGC 6853, NGC 7293, IC 4406);HELIX-NEBULA; COMETARY KNOTS; RING NEBULA; EXPANSION DISTANCES; NGC-2392; NGC-7293; KINEMATICS; TELESCOPE; NGC-6853; VELOCITY SO - Astronomical Journal 2002 ;123(6):3329-3347 6312 UI - 11398 AU - O'Neill MS AU - Loomis D AU - Meza VT AU - Retama A AU - Gold D AD - Harvard Univ, Sch Publ Hlth, Environm Epidemiol Program, Boston, MA 02115, USAUniv N Carolina, Chapel Hill, NC, USASecretaria Salud Mexico, Direcc Salud Amb, Mexico City, DF, MexicoUniv Autonoma Metropolitana, Unidad Xochimilco, Mexico City, DF, MexicoHarvard Univ, Sch Med, Brigham & Womens Hosp, Channing Lab, Boston, MA 02115, USAO'Neill, MS, Harvard Univ, Sch Publ Hlth, Environm Epidemiol Program, 665 Huntington Ave,14th Floor, Boston, MA 02115 USA TI - Estimating particle exposure in the Mexico City metropolitan area AB - Study question: We examined whether methods for measuring exposure to airborne particles less than 10 pm in aerodynamic diameter (PM10) in the Mexico City metropolitan area give different estimates of PM (10) levels, and the nature of these differences, and developed a model for estimating missing PM10 data for one measurement method. Methods: Government PM10 measurements using two different technologies at five sites (the Sierra-Anderson PM10 High-Volume Air Sampler System, Hi-Vol) (every sixth day) and the Rupprecht and Patashnik Tapered Element Oscillating Microbalance (TEOM) monitor (daily), as well as Harvard Impactor (141) data collected for research purposes from one monitoring station were matched by day and monitoring site, then compared visually and with basic descriptive statistics. We Fit linear regression models with airport visual range measurements, meteorological data, and information on other air pollutants to predict the Hi-Vol measured PM10 levels for those days when direct measurements were not available. Results: NVefound relatively low correlations (r ranging from 0.46 to 0.63)between PM10 measured with the TEOM and Hi-Vol methods, and highly variable differences (0-70 mug/m(3)) between the means of these measurements, depending on monitoring site. The HI measurements had a relatively high correlation with the Hi-Vel measurements (r=0.90). The models developed for the missing Hi-Vol measurements provided a series of estimated values similar to the actual Hi-Vol measurements, although the estimated series did not have high values in the range observed in the measured data. Conclusions: The differences we observed in the PM10 measurements across methods in Mexico City may be important when studying health effects associated with particle exposure, evaluating method performance under conditions and operating protocols similar to those in Mexico City, and determining compliance with air quality standards, The estimated series of PM10 measures may be a useful index of exposure for use in studies of the effects of air pollution on health MH - USA MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Toxicology U5 - J;Article AV - English IS - 1053-4245 UR - ISI:000175036100007 L2 - air pollution;exposure;linear regression;Mexico City;particles;visibility;PARTICULATE AIR-POLLUTION; DAILY MORTALITY; INFANT-MORTALITY; ASSOCIATIONS; CALIFORNIA; CHILDREN; LONDON; MASS SO - Journal of Exposure Analysis and Environmental Epidemiology 2002 ;12(2):145-156 6313 UI - 10890 AU - O'Shaughnessy J AU - Miles D AU - Vukelja S AU - Moiseyenko V AU - Ayoub JP AU - Cervantes G AU - Fumoleau P AU - Jones S AU - Lui WY AU - Mauriac L AU - Twelves C AU - Van Hazel G AU - Verma S AU - Leonard R AD - Baylor Sammons Canc Ctr, Dallas, TX 75246, USAUS Oncol, Houston, TX, USAPerth Oncol, Perth, WA, AustraliaWestern Gen Hosp, Edinburgh EH4 2XU, Midlothian, ScotlandWestern Infirm & Associated Hosp, Beatson Oncol Ctr, Glasgow G11 6NT, Lanark, ScotlandTaipei Vet Gen Hosp, Taipei, TaiwanInst Bergonie, Bordeaux, FranceCtr Rene Gauucheau Nantes Atlantique, St Herblain, FranceIssste Hosp, Mexico City, DF, MexicoOttawa Reg Canc Ctr, Ottawa, ON K1Y 4K7, CanadaHop Notre Dame de Bon Secours, Montreal, PQ H2L 4K8, CanadaNN Petrov Oncol Res Inst, St Petersburg, RussiaGuys Hosp, London SE1 9RT, EnglandO'Shaughnessy, J, Baylor Sammons Canc Ctr, 3535 Worth St,5th Floor, Dallas, TX 75246 USA TI - Superior survival with capecitabine plus docetaxel combination therapy in anthracycline-pretreated patients with advanced breast cancer: Phase III trial results AB - Purpose: Docetaxel and capecitabine, a tumor-activated oral fluoropyrimidine, show high single-agent efficacy in metastatic breast cancer (MBC) and synergy in preclinical studies. This international phase III trial compared efficacy and tolerability of capecitabine/docetaxel therapy with single-agent docetaxel in anthracycline-pretreated patients with MBC. Patients and Methods: Patients were randomized to 21-day cycles of oral capecitabine 1,250 mg/m(2) twice daily on days 1 to 14 plus docetaxel 75 mg/m(2) on day 1 (n = 255) or to docetaxel 100 mg/m(2) on day 1 (n = 256). Results: Capecitabine/docetaxel resulted in significantly superior efficacy in time to disease progression (TTP) (hazard ratio, 0.652; 95% confidence interval [CI], 0.545 to 0.780; P = .0001; median, 6.1 v 4.2 months), overall survival (hazard ratio, 0.775; 95% CI, 0.634 to 0.947; P = .0126; median, 14.5 v 11.5 months), and objective tumor response rate (42% v 300%, P = .006) compared with docetaxel. Gastrointestinal side effects and hand-foot syndrome were more common with combination therapy, whereas myalgia, arthralgia, and neutropenic fever/sepsis were more common with single-agent docetaxel. More grade 3 adverse events occurred with combination therapy (71% v 49%, respectively), whereas grade 4 events were slightly more common with docetaxel (31% v 25% with combination). Conclusion: The significantly superior TTP and survival achieved with the addition of capecitabine to docetaxel 75 mg/m(2), with the manageable toxicity profile, indicate that this combination provides clear benefits over single-agent docetaxel 100 mg/m(2). Docetaxel/capecitabine therapy is an important treatment option for women with anthracycline-pretreated MBC MH - Australia MH - Canada MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Russia MH - Taiwan MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 305 U4 - Oncology U5 - J;Article AV - English IS - 0732-183X UR - ISI:000176289200009 L2 - ORAL FLUOROPYRIMIDINE CARBAMATE; THYMIDINE PHOSPHORYLASE; CHEMOTHERAPY; 5-FLUOROURACIL; MULTICENTER; ENHANCEMENT; PACLITAXEL; EFFICACY; SCORES; TUMORS SO - Journal of Clinical Oncology 2002 ;20(12):2812-2823 6314 UI - 9773 AU - Obrador GT AU - Pereira BJG AU - Kausz AT AD - Tufts Univ New England Med Ctr, Div Nephrol, Boston, MA 02111, USATufts Univ, Sch Med, Boston, MA 02111, USAUniv Panamericana, Sch Med, Mexico City, DF, MexicoPereira, BJG, Tufts Univ New England Med Ctr, Div Nephrol, 750 Washington St, Boston, MA 02111 USA TI - Chronic kidney disease in the United States: An underrecognized problem MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 19 U4 - Urology & Nephrology U5 - J;Review AV - English IS - 0270-9295 UR - ISI:000179276300002 L2 - CHRONIC DIALYSIS PATIENTS; RENAL-DISEASE; RISK-FACTORS; HOSPITAL UTILIZATION; SERUM CREATININE; MORTALITY; HEALTH; PREDICTORS; INSUFFICIENCY; PROGRESSION SO - Seminars in Nephrology 2002 ;22(6):441-448 6315 UI - 9849 AU - Obrador GT AU - Pereira BJG AD - Tufts Univ New England Med Ctr, Div Nephrol, Boston, MA 02111, USATufts Univ, Sch Med, Boston, MA 02111, USAUniv Panamer, Sch Med, Mexico City, DF, MexicoPereira, BJG, Tufts Univ New England Med Ctr, Div Nephrol, 750 Washington St,Box 5224, Boston, MA 02111 USA TI - Anaemia of chronic kidney disease: an under-recognized and under-treated problem AB - Patients with chronic kidney disease (CKD) almost invariably develop anaemia, which is associated with increased morbidity and mortality, and reduced quality of life. Anaemia begins early in the course of CKD, and although treatment with erythropoietin is effective, the condition is often under-treated. Because of the growing body of scientific literature on the significant morbidity and mortality associated with anaemia of CKD, a Renal Anaemia. Management Period (RAMP) was proposed. This is defined as the time after onset of CKD when anaemia develops and requires early diagnosis and treatment. The RAMP was developed to call attention to the need to improve outcomes for patients with CKD and possibly lower the economic burden by correcting anaemia earlier. It is an important opportunity for preventive care and has the potential to limit costs associated with comorbidities of CKD MH - USA MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Transplantation;Urology & Nephrology U5 - J;Article AV - English IS - 0931-0509 UR - ISI:000179100700012 L2 - anaemia;chronic kidney disease;erythropoietin;Renal Anaemia Management Period;LEFT-VENTRICULAR HYPERTROPHY; RECOMBINANT-HUMAN-ERYTHROPOIETIN; STAGE RENAL-DISEASE; QUALITY-OF-LIFE; HEMODIALYSIS-PATIENTS; RISK-FACTORS; PREDIALYSIS PATIENTS; DIALYSIS PATIENTS; ANEMIA; THERAPY SO - Nephrology Dialysis Transplantation 2002 ;17():44-46 6316 UI - 10970 AU - Obrador GT AU - Ojo A AU - Thadhani R AD - Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Med, Boston, MA 02114, USATufts Univ New England Med Ctr, Div Nephrol, Boston, MA 02111, USAPanamer Univ, Sch Med, Mexico City, DF, MexicoUniv Michigan, Dept Nephrol, Ann Arbor, MI, USAHarvard Univ, Massachusetts Gen Hosp, Sch Med, Renal Unit, Boston, MA 02114, USAThadhani, R, Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Med, Founders 036,55 Fruit St, Boston, MA 02114 USA TI - End-stage renal disease in patients with Fabry disease MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000175997000006 L2 - REPLACEMENT THERAPY; TRANSPLANTATION; INVOLVEMENT; EXPERIENCE; ALLOGRAFT; FAILURE SO - Journal of the American Society of Nephrology 2002 ;13(6):S144-S146 6317 UI - 11744 AU - Obrador GT AU - Pereira BJG AD - Tufts Univ, New England Med Ctr, Sch Med, Div Nephrol, Boston, MA 02111, USAUniv Panamericana, Sch Med, Mexico City, DF, MexicoPereira, BJG, Tufts Univ, New England Med Ctr, Sch Med, Div Nephrol, 750 Washington St,Box 5224, Boston, MA 02111 USA TI - Systemic complications of chronic kidney disease - Pinpointing clinical manifestations and best management AB - PREVIEW Kidneys bear a huge responsibility in the survival of the human body. They keep our internal environment in balance and play an essential role in the maintenance of normal homeostasis. It therefore comes as no surprise that chronic kidney disease (CKD)-and the resultant decline in kidney function -can seriously affect essentially every organ system. In this article, Drs Obrador and Pereira review the most frequent systemic complications of CKD and offer recommendations for their management MH - USA MH - Mexico|Distrito Federal PB - MINNEAPOLIS: MCGRAW HILL HEALTHCARE PUBLICATIONS RP - NOT IN FILE U3 - TC 5 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0032-5481 UR - ISI:000173948100012 L2 - STAGE RENAL-DISEASE; MECHANISMS; FAILURE; HYPERTENSION; PATHOGENESIS SO - Postgraduate Medicine 2002 ;111(2):115-122 6318 UI - 11461 AU - Obregon-Barboza H AU - Maeda-Martinez AM AU - Garcia-Velazco H AU - Dumont HJ AD - Ctr Invest Biol Noroeste SC, La Paz 23000, Baja Calif Sur, MexicoCtr Bachillerato Tecnol Agropecuario 198, Maneadero 22900, Baja California, MexicoState Univ Ghent, Lab Anim Ecol, B-9000 Ghent, BelgiumObregon-Barboza, H, Ctr Invest Biol Noroeste SC, Apdo Postal 128, La Paz 23000, Baja Calif Sur, Mexico TI - Branchinecta oterosanvicentei n. sp (Branchiopoda : Anostraca), a new fairy shrimp from the Chihuahuan desert, with a proposal for the conservation of the Branchinectidae of Mexico AB - Branchinecta oterosanvicentei, new species, a fairy shrimp endemic to the south of Coahuila, Mexico is described and figured. Differential features between the new species and the related B. lindahli are discussed on the basis of a SEM micrographs. The main diagnostic characters of Branchinecta oterosanvicentei are: (1) a pulvinus covered by scales localized on the middle of the median side of the proximal article of antenna, and (2) a network of prominent cortical crests on the cyst surface. Of seven Branchinecta species occurring in Mexico, four (B. belki, B. mexicana, B. oterosanvicentei, and B. sandiegonensis) have a restricted geographic range. Because, in addition, extreme fluctuations in the number of mature individuals per population occur, the survival of all of these species is threatened, and measures should be taken to protect them. Branchinecta mackini has a wide distribution in North America, but even this form is rare in Mexico MH - Belgium MH - Mexico|Baja California Sur MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000174759600002 L2 - Coahuila;Crustacea;geographical distribution;new species;DISTRIBUTION RECORDS; PACKARDI PEARSE; UNITED-STATES; CRUSTACEA; CALIFORNIA; NOTOSTRACA; SPINICAUDATA; CHECKLIST; DIVERSITY SO - Hydrobiologia 2002 ;467(1-3):45-56 6319 UI - 10098 AU - Ocherashvili A AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - Kangling H AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Yunshan L AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko SI AU - Pogodin P AU - Pouh B AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zukanovich-Funchal R AD - Ball State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, Istanbul, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Ramat Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyOcherashvili, A, Medson Ltd, IL-76702 Rehovot, Israel TI - First measurement of pi(-)e ->pi(-)e gamma pion virtual compton scattering AB - Pion virtual compton scattering (VCS) via the reaction pi(-)e-->pi(-)egamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi(-) beam incident on target atomic electrons, detecting the incident pi(-) and the final state pi(-), electron and gamma. Theoretical predictions based on chiral perturbation theory are incorporated into a Monte Carlo simulation of the experiment and are compared to the data. The number of reconstructed events (=9) and their distribution with respect to the kinematic variables (for the kinematic region studied) are in reasonable accord with the predictions. The corresponding pi(-) VCS experimental cross section is sigma=38.8+/-13 nb, in agreement with the theoretical expectation of sigma=34.7 nb MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000178383900034 L2 - GENERALIZED POLARIZABILITIES; PROTON SO - Physical Review C 2002 ;66(3): 6320 UI - 10635 AU - Oehen S AU - Odermatt B AU - Karrer U AU - Hengartner H AU - Zinkernagel R AU - Lopez-Macias C AD - Hosp Especialidades Ctr Med La Raza, Unidad Invest Med Immunoquim, Mexico City, DF, MexicoUniv Zurich Hosp, Inst Expt Immunol, CH-8091 Zurich, SwitzerlandOehen, S, Cytos Biotechnol, Wagistr 25, CH-8952 Zurich, Switzerland TI - Marginal zone macrophages and immune responses against viruses AB - The effective establishment of antiviral protection requires a coordinated interplay between the innate and adaptive immune system. Using osteopetrotic (op(-/-)) mice, this study investigated the influence of marginal zone macrophages in controlling and initiating a protective immune response against a cytopathic vs a non- or low-cytopathic virus. Despite the generation of potent adaptive immune responses, antiviral protection against cytopathic vesicular stomatitis virus critically depended on the presence of marginal zone macrophages. Infection with low doses (100 PFU) of non- or low-cytopathic lymphocytic choriomeningitis virus was rarely cleared and usually resulted in a carrier state in the majority of mice. This shows that the early innate immune system provides an important preparatory phase to the adaptive immune system and is particularly important for antiviral protection MH - Mexico|Distrito Federal MH - Switzerland PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 19 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000177025100039 L2 - VESICULAR STOMATITIS-VIRUS; DENDRITIC CELL NETWORKS; ALPHA-DEFICIENT MICE; OP OP MOUSE; GERMINAL-CENTERS; VIRAL-INFECTION; LISTERIA-MONOCYTOGENES; NATURAL ANTIBODIES; OP/OP MOUSE; T-CELLS SO - Journal of Immunology 2002 ;169(3):1453-1458 6321 UI - 11591 AU - Ogley RN AU - Chaty S AU - Crocker M AU - Eyres SPS AU - Kenworthy MA AU - Richards AMS AU - Rodriguez LF AU - Stirling AM AD - Univ Keele, Dept Phys, Keele ST5 5BG, Staffs, EnglandOpen Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, EnglandUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Cent Lancashire, CFA, Preston PR1 2HE, Lancs, EnglandUniv Arizona, Steward Observ, Tucson, AZ 85721, USAUNAM, Inst Astron, Morelia, Michoacan, MexicoOgley, RN, Univ Keele, Dept Phys, Keele ST5 5BG, Staffs, England TI - A search for radio emission from Galactic supersoft X-ray sources AB - We have made a deep search for radio emission from all the northern hemisphere supersoft X-ray sources using the Very Large Array (VLA) and multi-element radio-linked interferometer network (MERLIN) telescopes, at 5 and 8.4 GHz. Three previously undetected sources, T Pyx, V1974 Cygni and RX J0019.8+2156, were imaged in quiescence using the VLA in order to search for any persistent emission. No radio emission was detected in any of the VLA fields down to a typical 1 sigma rms noise of 20 muJy beam(-1), however, 17 new point sources were detected in the fields with 5-GHz fluxes between 100 and 1500 muJy, giving an average 100-muJy source density of similar to200 deg(-2), comparable to what was found in the MERLIN Hubble Deep Field survey. The persistent source AG Draconis was observed by MERLIN to provide a confirmation of previous VLA observations and to investigate the source at a higher resolution. The core is resolved at the milliaresec scale into two components that have a combined flux of similar to1 mJy. It is possible that we are detecting nebulosity, which is becoming resolved out by the higher MERLIN resolution. We have investigated possible causes of radio emission from a wind environment, both directly from the secondary star, and also consequently, of the high X-ray luminosity from the white dwarf. There is an order of magnitude discrepancy between observed and modelled values that can be explained by the uncertainty in fundamental quantities within these systems MH - United Kingdom MH - Mexico|Michoacan MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000174426800002 L2 - binaries : general;novae, cataclysmic variables;white dwarfs;radio continuum : stars;X-rays : stars;NOVA T-PYXIDIS; LARGE MAGELLANIC CLOUD; SOURCE RX J0019.8+2156; CLOSE BINARY-SYSTEMS; AG DRACONIS; SYMBIOTIC STARS; MASS-LOSS; EVOLUTION; NOVA-CYGNI-1992; SHELL SO - Monthly Notices of the Royal Astronomical Society 2002 ;330(4):772-777 6322 UI - 11368 AU - Ohlsson J AU - Villarreal G AU - Sjostrom A AU - Abrahamsson M AU - Sjostrand J AD - Gothenburg Univ, Inst Clin Neurosci, Dept Ophthalmol, Gothenburg, SwedenUniv Autonoma Nuevo Leon, Dept Ophthalmol, Monterrey, MexicoOhlsson, J, SU Molndal, Dept Ophthalmol, SE-43180 Molndal, Sweden TI - Screening for amblyopia and strabismus with the Lang II stereo card AB - Purpose: To evaluate the effectiveness of the Lang II stereo card as a screening test for amblyopia and/or strabismus. Methods: A total of 1046 children aged 12-13 years were examined in a field study in the Goteborg area, Sweden. In addition to the Lang II stereo card, the examination included visual acuity, cover testing, cycloplegic refraction, and inspection of the optical media and posterior pole. Results: If every incorrect subject response was considered a reason for referral, the Lang II test would have correctly identified 82% (23 subjects) of the 28 children with manifest strabismus and 38% (11 subjects) of the 29 children with amblyopia. The test failed to refer 45% (21 subjects). Of all subjects referred, 44 (63%) were found to be ophthalmologically normal. Conclusions: The Lang II stereo card is neither a reliable nor an efficient method of screening for amblyopia and/or strabismus MH - Mexico|Nuevo Leon MH - Sweden PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 5 U4 - Ophthalmology U5 - J;Article AV - English IS - 1395-3907 UR - ISI:000175092800008 L2 - vision screening;amblyopia;strabismus;child;depth perception;CHILDREN; SWEDEN SO - Acta Ophthalmologica Scandinavica 2002 ;80(2):163-166 6323 UI - 8066 AU - Ohman MD AU - Lavaniegos BE AD - Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093, USACtr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada 22800, Baja California, MexicoOhman, MD, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093 USA TI - Comparative zooplankton sampling efficiency of a ring net and bongo net with comments on pooling of subsamples AB - We analyzed the comparative sampling efficiency of CalCOFI 1 m diameter ring nets and bongo nets in a series of paired comparisons from the California Current. Seventeen major taxa of holozooplankton were enumerated and species-specific analyses were carried out for hyperiid amphipods. The only consistent difference detected between these two nets was a significant increase in abundance of salps in the bongo net. In contrast with comparisons of abundance, the species diversity of hyperiid amphipods was higher when estimated from ring net than from bongo net collections, at higher numbers of individuals enumerated. Analysis of a sample pooling procedure revealed that the average abundance of the more numerous taxa was generally similar, whether determined by enumerating plankton samples individually or from a pooled sample comprising quantitative splits of individual samples. The average abundance of rare taxa was not well represented in the pooled sample. Sample pooling is particularly inappropriate for studies of pelagic species diversity MH - USA MH - Mexico|Baja California PB - LA JOLLA: SCRIPPS INST OCEANOGRAPHY RP - NOT IN FILE U3 - TC 3 U4 - Fisheries U5 - J;Article AV - English IS - 0575-3317 UR - ISI:000183929400012 L2 - CLIMATE SO - California Cooperative Oceanic Fisheries Investigations Reports 2002 ;43():162-173 6324 UI - 10046 AU - Oidor-Juarez I AU - Garcia-Jimenez P AU - Torres-Delgado G AU - Castanedo-Perez R AU - Jimenez-Sandoval O AU - Chao B AU - Jimenez-Sandoval S AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, MexicoCtr Nacl Metrol, El Marques, Qro, MexicoEnergy Convers Devices, Rochester, MI 48309, USAJimenez-Sandoval, S, IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Unidad Queretaro,AP 1-798, Queretaro 76001, Mexico TI - Substrate temperature effects on the growth and properties of gamma-MnS thin films grown by rf sputtering AB - The growth of manganese(II) sulfide films by radiofrequency sputtering are shown for the first time. Polycrystalline, nearly stoichiometric films of the metastable hexagonaly-MnS phase were obtained when the substrate temperature was approximately 26degreesC. For higher substrate temperatures, 120 and 180degreesC, the films were amorphous and sulfur deficient. The sulfur loss is substrate-temperature dependant. This behavior is discussed in terms of the dissociation of the MnS molecules during the sputtering process and the phase diagram of sulfur. An analysis of the optical transmission spectrum of the gamma-MnS films allowed us to estimate their index of refraction in the non-absorbing region of the spectrum and the electronic band gap in the high absorbance region, obtaining an E-g value of 3.47 +/- 0.01 eV at room temperature. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000178577600006 L2 - semiconductors;thin films;sputtering;GAAS SO - Materials Research Bulletin 2002 ;37(10):1749-1754 6325 UI - 11011 AU - Okasha S AD - Univ York, Dept Philosophy, York YO1 5DD, N Yorkshire, EnglandUniv Nacl Autonoma Mexico, Inst Invest Filosof, Mexico City 04510, DF, MexicoOkasha, S, Univ York, Dept Philosophy, York YO1 5DD, N Yorkshire, England TI - Darwinian metaphysics: Species and the question of essentialism AB - Biologists and philosophers of biology typically regard essentialism about species as incompatible with modern Darwinian theory. Analytic metaphysicians such as Kripke, Putnam and Wiggins, on the other hand, believe that their essentialist theses are applicable to biological kinds. I explore this tension. I show that standard anti-essentialist considerations only show that species do not have intrinsic essential properties. I argue that while Putnam and Kripke do make assumptions that contradict received biological opinion, their model of natural kinds, suitably modified, is partially applicable to biological species. However, Wiggins' thesis that organisms belong essentially to their species is untenable, given modern species concepts. I suggest that Putnam's, Kripke's and Wiggins' errors stem from adopting an account of the point of scientific classification which implies that relationally-defined kinds are likely to be of little value, an account which is inapplicable to biology MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - History & Philosophy Of Science U5 - J;Article AV - English IS - 0039-7857 UR - ISI:000175925200003 L2 - NATURAL KINDS SO - Synthese 2002 ;131(2):191-213 6326 UI - 9541 AU - Olague C AU - Castro P AU - Lopez W AD - Univ Autonoma Chihuahua, Fac Ingn, Chihuahua, MexicoUniv Autonoma Chihuahua, Chihuahua, MexicoIPN, CINVESTAV, Unidad Merida, Merida, Venezuela TI - Alkali-silica reaction of aggregates for concrete pavements in Chihuahua's State, Mexico AB - The concrete of pavements must resist the climatic conditions, heavy traffic, chemical agents or any other type of aggressive agent. A methodology for characterizing materials that would influence concrete durability was developed considering chemical and physical factors. This methodology allows the consideration of several factors like physiography, geology, and climate, among others that would be of great importance to prevent future durability problems of pavements. This methodology takes into account several tests and this paper presents the results of potential reactivity aggregates of the State of Chihuahua. The tests for evaluating the reactive siliceous aggregate and the potential alkali-silica reactivity were performed according to the: petrographic examination (ASTM C 295) and standard quick chemical test (ASTM C 289). 38% of the tested sites resulted innocuous, 48% potentially reactive and 13% reactive. It is discussed the benefit of applying a conscious methodology in order to obtain the best results with a representative quantity of tests MH - Mexico|Chihuahua MH - Venezuela PB - MADRID: INSTITUTO CIENCIAS CONSTRUCCION EDUARDO TORROJA RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - Spanish IS - 0465-2746 UR - ISI:000179768900002 L2 - concrete;pavement deterioration;reactivity;aggregates;alkali;silica;ACCELERATED METHOD SO - Materiales de Construccion 2002 ;52(268):19-31 6327 UI - 11830 AU - Olague G AU - Mohr R AD - Ctr Invest Cient & Educ Super Ensenada, Dept Ciencias Computac, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoZIRST 655, MOVI GRAVIR, F-38330 Montbonnot St Martin, St Martin, FranceOlague, G, Ctr Invest Cient & Educ Super Ensenada, Dept Ciencias Computac, Div Fis Aplicada, BC Km 107, Ensenada 22860, Baja California, Mexico TI - Optimal camera placement for accurate reconstruction AB - Three-dimensional (3D) measurements can be recovered from several views by triangulation. This paper deals with the problem of where to place the cameras in order to obtain a minimal error in the 3D measurements, also called camera network design in photogrammetry. We pose the problem in terms of an optimization design, dividing it into two main components: (1) an analytical part dedicated to the analysis of error propagation from which a criterion is derived, and (2) a global optimization process to minimize this criterion. In this way, the approach consists of an uncertainty analysis applied to the reconstruction process from which a covariance matrix is computed. This matrix represents the uncertainty of the detection from which the criterion is derived. Moreover, the optimization has discontinuities due to the presence of occluding surfaces between the viewpoint and the object point group. which leads to a combinatorial optimization process. These aspects are solved using a multi-cellular genetic algorithm. Experimental results are provided to illustrate the effectiveness and efficiency of the solution. (C) 2002 Pattern Recognition Society, Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0031-3203 UR - ISI:000173670800012 L2 - camera network design;uncertainty analysis;global optimization;covariance matrix;genetic algorithms;SENSOR PLACEMENT SO - Pattern Recognition 2002 ;35(4):927-944 6328 UI - 9632 AU - Olamendi-Portugal T AU - Garcia BI AU - Lopez-Gonzalez I AU - van der Walt J AU - Dyason K AU - Ulens C AU - Tytgat J AU - Felix R AU - Darszon A AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Genet & Mol Physiol, Cuernavaca 62210, Morelos, MexicoPotchefstroom Univ Christian Higher Educ, ZA-2520 Potchefstroom, South AfricaKatholieke Univ Leuven, Toxicol Lab, B-3001 Louvain, BelgiumIPN, CINVESTAV, Dept Physiol BIophys & Neurosci, Mexico City 07738, DF, MexicoPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Two new scorpion toxins that target voltage-gated Ca2+ and Na+ channels AB - This report describes the isolation, primary structure determination, and functional characterization of two similar toxins from the scorpion Parabuthus granulatus named kurtoxin-like I and II (KLI and KLII, respectively). KLII from P. granulatus is identical to kurtoxin from Parabuthus transvaalicus (a 63 amino-acid long toxin) whereas KLI is a new peptide containing 62 amino acid residues closely packed by four disulfide bridges with a molecular mass of 7244. Functional assays showed that both toxins, KLI and kurtoxin from P. granulatus, potently inhibit native voltage-gated T-type Ca2+ channel activity in mouse male germ cells. In addition, KLI was shown to significantly affect the gating mechanisms of recombinant Na+ channels and weakly block alpha(1) 3.3 Ca-v channels expressed in Xenopus oocytes. KLI and kurtoxin from P. granulatus represent new probes to study the role of ion channels in germ cells, as well as in cardiac and neural tissue. (C) 2002 Elsevier Science (USA). All rights reserved MH - Belgium MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - South Africa PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 23 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000179818100008 L2 - Ca2+ channel;Na+ channel;kurtoxin;T-type Ca2+ channel;spermatogenic cells;sperm;scorpion toxin;PANDINUS IMPERATOR; SPERMATOGENIC CELLS; SODIUM-CHANNELS; PEPTIDES; GENES; INHIBITION; EXPRESSION; VENOM SO - Biochemical and Biophysical Research Communications 2002 ;299(4):562-568 6329 UI - 10040 AU - Oleschko K AU - Korvin G AU - Balankin AS AU - Khachaturov RV AU - Flores L AU - Figueroa B AU - Urrutia J AU - Brambila F AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoKing Fahd Univ Petr & Minerals, Dhahran 31261, Saudi ArabiaInst Politecn Nacl, Mexico City 07738, DF, MexicoColegio Postgrad, Montecillos 56230, Estado De Mexic, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoOleschko, K, Univ Nacl Autonoma Mexico, Inst Geol, Apartado Postal 70-296,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Fractal scattering of microwaves from soils AB - Using a combination of laboratory experiments and computer simulation we show that microwaves reflected from and transmitted through soil have a fractal dimension correlated to that of the soil's hierarchic permittivity network. The mathematical model relating the ground-penetrating radar record to the mass fractal dimension of soil structure is also developed. The fractal signature of the scattered microwaves correlates well with some physical and mechanical properties of soils MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Saudi Arabia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000178622000061 L2 - LACUNARITY SO - Physical Review Letters 2002 ;89(18): 6330 UI - 10626 AU - Olesen B AU - Enriquez S AU - Duarte CM AU - Sand-Jensen K AD - Univ Aarhus, Dept Plant Ecol, DK-8240 Risskov, DenmarkUniv Nacl Autonoma Mexico, Unidad Acad Puerto Morelos, Inst Ciencias Mar & Limnol, Cancun 77500, Quintana Roo, MexicoUniv Balearic Isl, Inst Mediterrano Estudios Avanzados, SCIC, Esporles 07190, Islas Baleares, SpainUniv Copenhagen, Freshwater Biol Lab, DK-3400 Hillerod, DenmarkOlesen, B, Univ Aarhus, Dept Plant Ecol, Nordlandsvej 68, DK-8240 Risskov, Denmark TI - Depth-acclimation of photosynthesis, morphology and demography of Posidonia oceanica and Cymodocea nodosa in the Spanish Mediterranean Sea AB - Depth-related changes in population structure, biomass partitioning and photosynthesis were studied in populations of Cymodocea nodosa and Posidonia oceanica on the NE Spanish coast. The population structure of both species changed much more with depth than leaf morphology and physiology. Leaf biomass declined 5- to 7-fold along the depth gradient reducing self-shading within the canopy, whereas the leaf area per unit leaf biomass and the photosynthesis-light response varied less than 1.5-fold among depths. Moreover, C. nodosa developed a greater proportion of leaves relative to rhizomes and roots at greater depths, thereby promoting the balance between photosynthesis and respiration in the shoots. C. nodosa, being a potentially fast-growing species compared to P. oceanica, had higher maximum photosynthetic and respiration rates as well as light compensation points for photosynthesis. Photosynthetic efficiency at low light, however, was almost the same for the 2 species as suggested by the relatively small differences in mass-specific light absorption. Only C. nodosa acclimated physiologically to depth as light-use efficiency increased, and light compensation point declined significantly from shallow to deep water. P. oceanica, however, possessed low respiration rates and slightly lower light compensation points values than C. nodosa throughout the depth range. Shoot mortality and recruitment rates were unaffected by rooting depth. C. nodosa stand experienced fast shoot turnover compared to R oceanica, and shoot longevity of the former species decreased significantly with depth, suggesting higher risk of patch mortality at the depth limit. In contrast, F oceanica shoot longevity was highest at great depths. Overall, these species differences in leaf metabolism and shoot dynamics suggest that C. nodosa responds faster to changing light conditions, whereas P. oceanica is able to survive longer at low irradiance due to low growth and respiratory maintenance rates MH - Denmark MH - Mexico|Quintana Roo MH - Spain PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 18 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000177007100009 L2 - seagrasses;biomass partitioning;shoot demography;leaf production;photosynthetic light response;EELGRASS ZOSTERA-MARINA; FRESH-WATER MACROPHYTES; THALASSIA-TESTUDINUM; LIGHT-INTENSITY; GROWTH; RESPONSES; REDUCTION; PRODUCTIVITY; TEMPERATURE; MAINTENANCE SO - Marine Ecology-Progress Series 2002 ;236():89-97 6331 UI - 10671 AU - Olguin D AU - Cardona A AU - Cantarero A AD - Univ Valencia, Inst Sci Mat, E-46071 Valencia, SpainMax Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyIPN, CINVESTAV, Dept Fis, Mexico City 07738, DF, MexicoCantarero, A, Univ Valencia, Inst Sci Mat, POB 22085, E-46071 Valencia, Spain TI - Electron-phonon effects on the direct band gap in semiconductors: LCAO calculations AB - Using a perturbative treatment of the electron-phonon interaction, we have studied the effect of phonons on the direct band gap of conventional semiconductors. Our calculations are performed in the framework of the tight-binding linear combination of atomic orbitals (LCAO) approach. Within this scheme we have calculated the temperature and isotopic mass dependence of the lowest direct band gap of several semiconductors with diamond and zincblende structure. Our results reproduce the overall trend of available experimental data for the band gap as a function of temperature, as well as give correctly the mass dependence of the band gap on isotopic. A calculation of conduction band intervalley deformation potentials is also reported. Finally, calculated Debye-Waller factors are compared with X-ray and EXAFS experimental results. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000176873500001 L2 - semiconductors;electron-phonon interaction;temperature dependence of band gaps;EXAFS Debye-Waller factors;INTERVALLEY DEFORMATION POTENTIALS; ZINCBLENDE-TYPE SEMICONDUCTORS; HIGH-PRECISION DETERMINATION; TEMPERATURE-DEPENDENCE; LATTICE-DYNAMICS; ENERGY-GAP; ABSORPTION-EDGE; ISOTOPIC COMPOSITION; OPTICAL-PROPERTIES; FUNDAMENTAL GAP SO - Solid State Communications 2002 ;122(11):575-589 6332 UI - 10001 AU - Olivares-Robles MA AU - Ulloa SE AD - Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USAOlivares-Robles, MA, Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Dipole crystals in two-dimensional systems AB - A two-dimensional (21)) interacting gas of excitons in it system with spatially separated electron-hole layers crystallizes at low densities into a 213 crystal. In this work, we study the properties of such a lattice for a gas of polarized excitons in the classical regime. The dipoles are assumed to be in the xy plane. while being constrained or 'polarized' in the z direction. We calculate the ground-state energy of the 2D dipole crystal at a constant number density, for all 2D Bravais lattices, We find that. similarly to the case of point charges, the hexagonal lattice has (lie lowest energy MH - Mexico|Morelos MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000178705900011 L2 - QUANTUM-WELLS; INDIRECT EXCITONS; CLUSTERS SO - Physica Status Solidi B-Basic Research 2002 ;233(2):280-285 6333 UI - 10512 AU - Olivares-Torres CA AU - Laniado-Laborin R AU - Chavez-Garcia C AU - Leon-Gastelum C AU - Reyes-Escamilla A AU - Light RW AD - Hosp Gen Tijuana, Dept Surg, Tijuana, MexicoHosp Gen Tijuana, Dept Pulm Dis, Tijuana, MexicoHosp Gen Tijuana, Dept Anesthesia, Tijuana, MexicoSt Thomas Hosp, Dept Med, Nashville, TN, USAVanderbilt Univ, Ctr Lung Res, Nashville, TN 37232, USALaniado-Laborin, R, PMB 953,482 W San Ysidro Blvd 2, San Ysidro, CA 92173 USA TI - Iodopovidone pleurodesis for recurrent pleural effusions AB - Study objective. Chemical pleurodesis may be the best available treatment for recurrent and troublesome pleural effusions when the underlying cause cannot be corrected. A wide variety of pleural irritants have been used, but the search for the ideal agent for pleurodesis continues. The purpose of our study is to evaluate the efficacy and safety of iodopovidone as an agent for pleurodesis in patients with recurrent pleural effusion. Design and setting. Multicenter prospective study. Intervention: The pleurodesis solution consisted of a mixture of 20 mL 10% iodopovidone and 80 mL normal saline solution. It was infused and left in the pleural cavity for 2 h. In 12 patients, pleurodesis was performed through a tube thoracostomy, and in the remaining 40 patients it was carried out at the end of diagnostic thoracoscopy. Results. Fifty-two patients were included, with a mean (+/- SEM) age of 56.6 +/- 1.84 years. Eighty-five percent of the cases were related to a malignant neoplasm. A complete response, with no reaccumulation of fluid during follow-up, was obtained in 50 patients (96.1%). A second procedure was successful in the two remaining patients. Three patients (5.8%) experienced intense pleuritic pain and systemic hypotension after the instillation of the sclerosing agent. They recovered without incident. The mean length of follow-up was 13 +/- 1.46 months, with a median of 8.5 months. There were no 30-day postoperative deaths. Conclusions: Iodopovidone is an effective, safe, readily available, and inexpensive alternative to achieve chemical pleurodesis in cases of recurred, incapacitating effusions, regardless of etiology MH - USA MH - Mexico|Baja California PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 14 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000177449400034 L2 - iodopovidone;malignant pleural effusion;pleurodesis;RESPIRATORY-FAILURE; TALC SO - Chest 2002 ;122(2):581-583 6334 UI - 10452 AU - Olivares JC AU - Canedo J AU - Moreno P AU - Driesen J AU - Escarela R AU - Palanivasagam S AD - Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061, USAOlivares, JC, Andador Lirio 351-A, Michoacan 59618, Mexico TI - Experimental study to reduce the distribution-transformers stray losses using electromagnetic shields AB - This paper examines the effects of using aluminum electromagnetic shields in a distribution transformer. The goal of placing electromagnetic shields in the distribution transformer tank walls is to reduce the stray losses. A 500 kVA shell-type transformer is used. The overall results presented in this research work indicate that stray losses can be considerably reduced when electromagnetic shielding is applied to the transformer tank. In the experiment, the walls of the steel tank of the transformer were lined with aluminum foil. A section of this paper is devoted to the characterization of stray losses against the transformer rating (kVA) and the stray losses over load losses against the transformer rating (kVA). The experimental data presented in this work, will be helpful for a practicing engineer in the transformer industry. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0378-7796 UR - ISI:000177567500001 L2 - distribution transformer;electromagnetic shields;aluminum;stray losses;tank walls;POWER TRANSFORMERS SO - Electric Power Systems Research 2002 ;63(1):1-7 6335 UI - 10731 AU - Olivares W AU - Degreve L AU - Villegas JC AU - Lozada-Cassou M AD - Univ Los Andes, Grp Quim Teor, Dept Quim, Merida 5101, VenezuelaUniv Sao Paulo, Dept Quim, Grp Simulacao Mol, BR-14049 Ribeirao Preto, BrazilInst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoOlivares, W, Univ Los Andes, Grp Quim Teor, Dept Quim, Merida 5101, Venezuela TI - Liquid correlation across the walls in a slit pore: Effect on the wetting and drying transition AB - The liquid structure next to the walls of a slit pore, immersed in a model simple liquid, is studied through a liquid theory and grand canonical Monte Carlo simulations. A liquid correlation across slit walls, of finite width, is found. This correlation modifies the structure and capillary partial wetting and drying transitions of the nonhomogeneous fluid, when close to its liquid-vapor coexistence curve MH - Brazil MH - Mexico|Distrito Federal MH - Venezuela PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000176762500057 L2 - CHARGED FLUIDS; ADSORPTION; EQUATION; ETHYLENE; GRAPHITE SO - Physical Review e 2002 ;65(6): 6336 UI - 11955 AU - Olivieri F AU - Zanetti ME AU - Oliva CR AU - Covarrubias AA AU - Casalongue CA AD - Univ Nacl Mar del Plata, Inst Invest Biol, RA-7600 Mar Del Plata, ArgentinaUniv Nacl Mar del Plata, Inst Invest Biol, Fac Ciencias Exactas & Nat, RA-7600 Mar Del Plata, ArgentinaUniv Nacl Mar del Plata, Dept Biol, Fac Ciencias Exactas & Nat, RA-7600 Mar Del Plata, ArgentinaUNAM, Inst Biotecnol, Cuernavaca 62210, Morelos, MexicoCasalongue, CA, Univ Nacl Mar del Plata, Inst Invest Biol, CC 1245, RA-7600 Mar Del Plata, Argentina TI - Characterization of an extracellular serine protease of Fusarium eumartii and its action on pathogenesis related proteins AB - Proteases have been proposed as part of the invasion strategies of some pathogenic fungi. In this work, a serine protease produced by the phytopathogenic fungus Fusarium solani f.sp. eumartii was purified and characterized. Purification of the enzyme was accomplished by gel filtration through a Superose 12 column, followed by hydrophobic interaction chromatography in Phenyl Superose and gel filtration chromatography through Superdex 75. Analysis of the purified enzyme by SDS/PAGE without heat treatment, revealed a single band, which corresponded to the proteolytic activity detected by zymogram. When this protein was subjected to denaturing conditions, two major polypeptides of approximately 30 and 33 kDa were revealed. The N-terminal amino acid sequence of one of these polypeptides showed a high similarity with fungal mature serine proteases of the subtilisin family. This protease hydrolysed in vitro, specific polypeptides of potato intercellular washing fluids and cell walls. The protease was also able to degrade pathogenesis-related proteins from the intercellular washing fluids. The role of this serine protease as part of the fungal strategy to colonize potato tuber tissues is discussed MH - Argentina MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0929-1873 UR - ISI:000173509700007 L2 - chitinase;extracellular protease;fungal protease;glucanase;Solanum tuberosum;ALKALINE PROTEASE; SACCHAROMYCES-CEREVISIAE; NUCLEOTIDE-SEQUENCE; CDNA CLONE; INFECTION; GENE; POTATO; SUBTILISIN; EXPRESSION; CHITINASE SO - European Journal of Plant Pathology 2002 ;108(1):63-72 6337 UI - 12254 AU - Olson ME AD - Missouri Bot Garden, St Louis, MO 63166, USAOlson, ME, Univ Nacl Autonoma Mexico, Dept Bot, Circuito Exterior S-N,Ciudad Univ,AP 70-367, Mexico City 04510, DF, Mexico TI - Intergeneric relationships within the Caricaceae-Moringaceae clade (Brassicales) and potential morphological synapomorphies of the clade and its families AB - Recently published molecular phylogenetic studies indicate a sister taxon relationship between Caricaceae and Moringaceae; such a relationship was not identified in nearly 250 yr of morphological studies because the families share few obvious similarities. This study tests the monophyly of both families and attempts to identify morphological synapomorphies of the two-family clade and of each family. Parsimony analysis of DNA sequence variation in the chloroplast gene rbcL supports the monophyly of both families. Sampling includes six original rbcL sequences and 20 from the GenBank database, with single representatives of each of the four genera of Caricaceae and four members of the monogeneric Moringaceae. To reconstruct intergeneric relationships, one nuclear (ITS) and one chloroplast (trnG) locus were sequenced from one to two members of each of the four genera of Caricaceae, with two species of Moringa used as an outgroup. In the tree resulting from the combined analysis of the ITS and trnG data sets, Cylicomorpha is the sister taxon to the rest of Caricaceae, which comprises Jarilla as the sister taxon to a Carica-Jacaratia clade. To identify synapomorphies, morphological characters with state distributions congruent with the clades of interest are assessed for their similarity in structure, location, and function. Synapomorphies of the Caricaceae-Moringaceae clade include subulate glands at the base and apex of the petiole and on the lamina and the pachycaul "bottle tree" life form. Synapomorphies of Caricaceae include articulated laticifers and the absence of libriform fibers. Synapomorphies of Moringaceae include pinnately compound leaves and monothecal, bisporangiate anthers MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences U5 - J;Article AV - English IS - 1058-5893 UR - ISI:000172542400004 L2 - Brassicales;Caricaceae;Moringaceae;phylogeny;morphology;GLUCOSINOLATE-PRODUCING PLANTS; FLORAL DEVELOPMENT; TAXONOMIC ANALYSIS; SEQUENCES; EVOLUTION; ANATOMY; RBCL; PHYLOGENIES; NUCLEAR; REGION SO - International Journal of Plant Sciences 2002 ;163(1):51-65 6338 UI - 11279 AU - Olson RJ AU - Galvan-Magana F AD - Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz, BCS, MexicoOlson, RJ, Interamer Trop Tuna Commiss, 8604 La Jolla Shore Dr, La Jolla, CA 92037 USA TI - Food habits and consumption rates of common dolphinfish (Coryphaena hippurus) in the eastern Pacific Ocean AB - An ecosystem approach to fisheries management requires an understanding of the impact of predatory fishes on the underlying prey resources. Defining trophic connections and measuring rates of food consumption by apex predators lays the groundwork for gaining insight into the role of predators and commercial fisheries in influencing food web structure and ecosystem dynamics. We analyzed the stomach contents of 545 common dolphinfish (Coryphaena hippurus) sampled from 74 sets of tuna purse-seine vessels fishing in the eastern Pacific Ocean (EPO) over a 22-month period. Stomach fullness of these dolphinfish and digestion state of the prey indicated that diel feeding periodicity varied by area and may be related to the digestibility and energy content of the prey. Common dolphinfish in the EPO appear to feed at night, as well as during the daytime. We analyzed prey importance by weight, numbers, and frequency of occurrence for five regions of the EPO. Prey importance varied by at-ea. Flyingfishes, epipelagic cephalopods, tetraodontiform fishes, several mesopelagic fishes, Auxis spp., and gempylid fishes predominated in the diet. Ratios of prey length to predator length ranged from 0.014 to 0.720. Consumption-rate estimates averaged 5.6% of body weight per day. Stratified by sex, area, and length class, daily rations ranged up to 9.6% for large males and up to 19.8% for small dolphinfish in the east area (0-15degreesN, 111degreesW-coastline). Because common dolphinfish exert substantial predation pressure on several important prey groups, we concluded that their feeding ecology provides important clues to the pelagic food web and ecosystem structure in the EPO MH - USA MH - Mexico|Baja California Sur PB - SEATTLE: NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE RP - NOT IN FILE U3 - TC 6 U4 - Fisheries U5 - J;Article AV - English IS - 0090-0656 UR - ISI:000175226800011 L2 - STOMACH CONTENTS; GASTRIC EVACUATION; THUNNUS-ALBACARES; YELLOWFIN TUNA; ECOSYSTEMS; FISH; MANAGEMENT; FISHERIES; ABUNDANCE; PREDATION SO - Fishery Bulletin 2002 ;100(2):279-298 6339 UI - 9091 AU - Omidi N AU - Blanco-Cano X AU - Russell CT AU - Karimabadi H AU - Acuna M AD - Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093, USANASA, Goddard Space Flight Ctr, Extraterr Phys Lab, Greenbelt, MD 20771, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024, USAUniv Calif San Diego, Calif Space Inst, La Jolla, CA 92093, USAOmidi, N, Univ Calif San Diego, Dept Elect & Comp Engn, Mail Code 0407, La Jolla, CA 92093 USA TI - Hybrid simulations of solar wind interaction with magnetized asteroids: General characteristics AB - Using electromagnetic hybrid (kinetic ions, fluid electrons) simulations, the interaction between solar wind and a magnetized asteroid is investigated. At no or very low levels of asteroid magnetization the solar wind remains undisturbed. As the level of magnetization is increased, a phase standing whistler wake is generated which owing to its propagation characteristics remains confined to planes close to that containing the solar wind flow velocity and the interplanetary magnetic field (IMF). No density perturbations are associated with this wake. Further increase in asteroid magnetization results in the additional generation of fast and slow magnetosonic wakes, which fall behind the whistler wake and are associated with the formation of a plasma tail. Because of their propagation characteristics, these wakes are more symmetric than the whistler wake. At still higher levels of magnetization where plasma pileup occurs upstream of the asteroid, the fast magnetosonic wake becomes dominant and eventually exhibits shock-like behavior. In general, the size of the interaction region increases with the level of asteroid's magnetic field strength. This interaction region is highly structured and asymmetric owing to wave propagation characteristics and the IMF direction. In addition, once the fast magnetosonic wake is strong enough to result in ion reflection the subsequent E x B motion of these ions results in considerable asymmetry in the interaction region. This is a purely ion kinetic effect which comes about as a result of the overall interaction region being comparable to ion scale lengths MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000181243000004 L2 - asteroids;solar wind interactions;whistler wake;hybrid simulations;FIELD SO - Journal of Geophysical Research-Space Physics 2002 ;107(A12): 6340 UI - 9565 AU - Ondarza RN AU - Iturbe A AU - Hernandez E AU - Hurtado G AD - Univ Calif San Diego, Scripps Inst Oceanog, Ctr Res Marine Biotechnol & Biomed, La Jolla, CA 92093, USANatl Autonomous Univ Mexico, Dept Biochem, Fac Med, Mexico City 04510, DF, MexicoNatl Inst Publ Hlth, Ctr Res Infect Dis, Cuernavaca 62508, Morelos, MexicoOndarza, RN, Olivar de los Padres 941, Mexico City 01780, DF, Mexico TI - Thiol compounds from a free-living pathogenic opportunistic amoeba, Acanthamoeba polyphaga AB - New bimane-reacting compounds from perchloric acid extracts have been detected by HPLC from Acanthamoeba polyphaga. The main compounds detected are cysteine, glutathione and other novel thiol compounds. All of these compounds must be thiols, since they disappear or decrease substantially when treated by N-ethylmaleimide prior to acetonitrile/bimane derivatization. Cysteine and glutathione increase in quantity when dithiothreitol reduction is applied to the fresh extract. This means that they are likely to be present in their oxidized and reduced form and indicates the possible presence of a corresponding thiol/disulphide enzymic system. There are other compounds that have a different behaviour, since although they can react with bimane, they do not disappear if treated previously by N-ethylmaleimide. This shows that they are not thiols but can react with bimane. The main thiol compounds found to be present, in both the parasite and the host lymphocyte cells, were cysteine and glutathione. We were unable to detect ovothiol A in Acanthamoeba but instead we found another thiol compound that could be structurally related to trypanothione. The new thiol compounds unique to this parasite and not present in lymphocytes will permit the study of disulphide-reducing enzymes as potential drug targets MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LONDON: PORTLAND PRESS RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0885-4513 UR - ISI:000179819000006 L2 - cysteine;disulphide-reducing enzyme;glutathione;novel thiol;potential drug target;ENTAMOEBA-HISTOLYTICA HK9; GLUTATHIONE METABOLISM; TRYPANOTHIONE; TRYPANOSOMATIDS; EUKARYOTE; REDUCTASE; OVOTHIOL SO - Biotechnology and Applied Biochemistry 2002 ;36():195-204 6341 UI - 10006 AU - Ongay F AU - Rabin JM AD - CIMAT, Guanajuato 36240, MexicoUniv Calif San Diego, Dept Math, La Jolla, CA 92093, USAOngay, F, CIMAT, Guanajuato 36240, Mexico TI - On decomposing N=2 line bundles as tensor products of N=1 line bundles AB - We obtain the existence of a cohomological obstruction to expressing N = 2 line bundles as tensor products of N = 1 bundles. The motivation behind this paper is an attempt at understanding the N = 2 super KP equation via Baker functions, which are special sections of line bundles on supercurves MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0377-9017 UR - ISI:000178667800002 L2 - complex supercurves;complex superline bundles;super Riemann surfaces;SUPER-RIEMANN SURFACES; KP SO - Letters in Mathematical Physics 2002 ;61(2):101-106 6342 UI - 8951 AU - Opuni M AU - Bertozzi S AU - Izazola JA AU - Gutierrez JP AU - McGreevey W AD - Natl Publ Hlth Inst, Div Hlth Econ & Policy, Cuernavaca 62508, Morelos, MexicoUniv Calif San Francisco, Inst Global Hlth, San Francisco, CA 94143, USACtr Res & Teaching Econ, CIDE, Mexico City, DF, MexicoReg AIDS Initiat Latin Amer, Mexico City, DF, MexicoCaribbean SIDALAC, Mexico City, DF, MexicoFuture Grp Int, Washington, DC, USABertozzi, S, Natl Publ Hlth Inst, Div Hlth Econ & Policy, Ave Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Resources for HIV/AIDS prevention and care MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0269-9370 UR - ISI:000181594100008 L2 - HIV;AIDS;financing;economics SO - Aids 2002 ;16():S53-S60 6343 UI - 9197 AU - Opuni M AU - Bertozzi S AU - Bollinger L AU - Gutierrez JP AU - Massiah E AU - McGreevey W AU - Stover J AD - Natl Inst Publ Hlth, Div Hlth Econ & Policy, Cuernavaca 62508, Morelos, MexicoUniv Calif San Francisco, Inst Global Hlth, San Francisco, CA 94143, USACIDE, Ctr Res & Teaching Econ, Mexico City, DF, MexicoFutures Grp Int, Washington, DC, USAInter Amer Dev Bank, Washington, DC, USABertozzi, S, Natl Inst Publ Hlth, Div Hlth Econ & Policy, Avenida Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Resource requirements to fight HIV/AIDS in Latin America and the Caribbean AB - Objectives: Economists and epidemiologists from 10 countries in Latin America and the Caribbean (LAC) reviewed the methods used to develop estimates for resource requirements to address HIV/AIDS prevention and care in low- and middle-income countries. Methods: They applied their country-specific knowledge to re-estimate the costs, coverage, and capacity of their health and education systems to expand HIV/AIDS interventions by 2005. A discrepancy of US$1173 million exists between the model estimates and those of country specialists. Results: The most important difference between the model estimates and those of country specialists was in the estimated future price of highly active antiretroviral therapy. To a large extent, the estimates of the model reflect the efficiency gains that could result from purchasing arrangements that lead LAC countries to lower prices for antiretroviral drugs. Conclusion: This preliminary exercise with 10 LAC countries confirmed the validity of the use of these estimates as tools at the international level, given current data limitations, both to guide the allocation of resources across diseases and countries, and for advocacy and resource mobilization. In addition, with the country revisions, these estimates have also been shown to be key tools for country-level strategic planning. (C) 2002 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Infectious Diseases;Virology U5 - J;Article AV - English IS - 0269-9370 UR - ISI:000180932000009 L2 - AIDS;economics;financing;HIV;Latin America;Caribbean SO - Aids 2002 ;16():S58-S65 6344 UI - 10982 AU - Orange JS AU - Brodeur SR AU - Jain A AU - Bonilla FA AU - Schneider LC AU - Kretschmer R AU - Nurko S AU - Rasmussen WL AU - Kohler JR AU - Gellis SE AU - Ferguson BM AU - Strominger JL AU - Zonana J AU - Ramesh N AU - Ballas ZK AU - Geha RS AD - Childrens Hosp, Div Immunol, Boston, MA 02115, USAHarvard Univ, Sch Med, Dept Pediat, Boston, MA, USANIAID, Clin Invest Lab, NIH, Bethesda, MD 20892, USAHosp ABC, Dept Pediat, Mexico City, DF, MexicoIowa City Vet Adm, Dept Internal Med, Iowa City, IA, USAHarvard Univ, Sch Med, Dept Pediat, Boston, MA 02115, USAChildrens Hosp, Div Infect Dis, Boston, MA 02115, USAOregon Hlth Sci Univ, Dept Mol & Med Genet, Portland, OR 97201, USAHarvard Univ, Dept Cell & Mol Biol, Cambridge, MA 02138, USAGeha, RS, Childrens Hosp, Div Immunol, 300 Longwood Ave, Boston, MA 02115 USA TI - Deficient natural killer cell cytotoxicity in patients with IKK-gamma/NEMO mutations AB - NF-kappaB essential modifier (NEMO), also known as IKK-gamma, is a member of the I-kappaB kinase complex responsible for phosphorylating I-kappaB, allowing the release and activation of NF-kappaB. Boys with an expressed NEMO mutation have an X-linked syndrome characterized by hypohidrotic ectodermal dysplasia with immune deficiency (HED-ID). The immunophenotype resulting from NEMO mutation is highly variable, with deficits in both T and B cell responses. We evaluated three patients with NEMO mutations (L153, Q403X, and C417R) and HED-ID who had evidence of defective CD40 signaling. All three patients had normal percentages of peripheral blood NK cells, but impaired NK cell cytotoxic activity. This was not due to a generalized defect in cytotoxicity because antibody-dependent cellular cytotoxicity was intact. This abnormality was partially reversed by in vitro addition of IL-2 which was also able to induce NF-kappaB activation. In one patient with recurrent cytomegalovirus infections, administration of IL-2 partially corrected the NK cell killing deficit. These data suggest that NEMO participates in signaling pathways leading to NK cell cytotoxicity and that IL-2 can activate NF-kappaB and partially overcome the NK cell defect in patients with NEMO mutations MH - USA MH - Mexico|Distrito Federal PB - ANN ARBOR: AMER SOC CLINICAL INVESTIGATION INC RP - NOT IN FILE U3 - TC 71 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0021-9738 UR - ISI:000176015300014 L2 - NF-KAPPA-B; HYPOHIDROTIC ECTODERMAL DYSPLASIA; MURINE CYTOMEGALOVIRUS-INFECTION; INCONTINENTIA PIGMENTI; NK CELLS; KINASE; ACTIVATION; NEMO; EXPRESSION; RECEPTORS SO - Journal of Clinical Investigation 2002 ;109(11):1501-1509 6345 UI - 11351 AU - Orange JS AU - Brodeur SR AU - Jain A AU - Bonilla FA AU - Schneider LC AU - Kretschmer R AU - Nurko S AU - Koehler JR AU - Rasmussen WL AU - Fergusson BM AU - Zonnana J AU - Ramesh N AU - Ballas ZK AU - Geha RS AD - Harvard Univ, Childrens Hosp, Boston, MA 02115, USANIH, Bethesda, MD 20892, USAHosp ABC, Mexico City, DF, MexicoIowa City Vet Adm, Iowa City, IA, USAOregon Hlth Sci Univ, Portland, OR 97201, USA TI - Deficiency of natural cytotoxicity in patients with IKK gamma/NEMO mutations MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593902859 SO - Faseb Journal 2002 ;16(5):A1242-A1242 6346 UI - 7744 AU - Orbe-Mendoza AA AU - cevedo-Garcia J AU - Lyons J AD - Ctr Reg Invest Pesquero Patzcuaro, Patzcuaro 61609, Michoacan, MexicoUniv Wisconsin, Zool Museum, Monona, WI 53716, USAWisconsin Dept Nat Resources, Monona, WI 53716, USAOrbe-Mendoza, AA, Ctr Reg Invest Pesquero Patzcuaro, Calzada Ibarra 28,Colonia Ibarra, Patzcuaro 61609, Michoacan, Mexico TI - Lake Patzcuaro fishery management plan AB - Lake Patzcuaro, a 97.5 km(2) lake in central Mexico, has an important artisanal multi-species fishery that is currently overexploited. Twelve fishes and one amphibian are important in the fishery, which is conducted largely from small wooden boats using seines, gill nets, and the traditional butterfly net. Fishery yields from the lake peaked in 1988, but have declined to near record lows since then. We propose a management plan to restore the fishery. Key components of the plan include: 1) licensing and restricting the number of fishermen; 2) continuing a recent ban on seines and implementing limits on the number and mesh sizes of gill nets to allow fish to complete at least one spawning before they are vulnerable to harvest; 3) establishing a closed season and areas closed to fishing to protect spawning fish; 4) increased education for fishermen in basic skills, fishing technology, and alternative jobs; 5) continued monitoring and research to assess trends in the fishery and to develop culture techniques to help restore fish populations; and 6) compliance and enforcement mechanisms to make the plan effective, including perhaps establishment of property rights for particular areas of the lake for specific groups of fishermen and more generally an equitable assignment of lake ecosystem uses between fishery and non-fishery users. We recommend the plan be implemented in an adaptive fashion with provisions for adjusting regulations as conditions warrant. If at least some elements of this plan are not adopted then the Lake Patzcuaro fishery is likely to collapse MH - Mexico|Michoacan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0960-3166 UR - ISI:000184595600010 L2 - Algansea lacustris;Chirostoma;Cyprinus carpio;Goodeidae;Lake Patzcuaro;Mexico;MEXICO SO - Reviews in Fish Biology and Fisheries 2002 ;12(2):207-217 6347 UI - 9823 AU - Orduna-Rojas J AU - Robledo D AU - Dawes CJ AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Cordemex 97310, Yucatan, MexicoCtr Interdisciplinario Invest Desarrollo Integral, Guasave 81101, Sinaloa, MexicoUniv S Florida, Dept Biol, Tampa, FL 33620, USAOrduna-Rojas, J, IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, AP 73, Cordemex 97310, Yucatan, Mexico TI - Studies on the tropical agarophyte Gracilaria cornea J.Agardh (Rhodophyta, Gracilariales) from Yucatan, Mexico. I. Seasonal physiological and biochemical responses AB - Photosynthetic performance, photosynthetic pigments, carbohydrate and protein content were measured monthly in Gracilaria cornea collected over 1 year in Yucatan, Mexico. The algae showed a marked seasonality in photosynthetic capacity and biochemical constituents. The photosynthetic rates (4 to 11 mg O-2 g d wt(-1) h(-1)) were higher during the cold (November - February) and dry (March - June) seasons compared to the wet (June-October) season. Compensation and saturation irradiances were low (17-37 and 72-155 mumol photons m(-2) s(-1)). Thus, although the populations occurred in shallow (2-4 m) water, the low light acclimation reflects the effect of high turbidity, sedimentation on the branches, and low irradiance values that were continuously recorded (1.97 to 8.85 mol photons m(-2) d(-1)) throughout the year. The low concentrations of chlorophyll a (0.25 to 0.49 mg g d wt(-1)) and phycoerythrin (0.03 to 0.25 mg g d wt(-1)) reflect the oligotrophic waters as shown by concentrations of dissolved inorganic nitrogen (9.1 mumol L-1) and dissolved reactive phosphate (0.5 mumol L-1). Total soluble carbohydrate levels increased from July to October reaching 56% (dry weight basis) coinciding with high water temperatures. Protein levels ranged from 5.1% in February to 3.0% (dry weight basis) in August with no significant differences between months. Thus, the growth period for Gracilaria cornea appears to be temperature limited, occurring mainly during the dry seasons MH - Mexico|Sinaloa MH - Mexico|Yucatan MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000179163800006 L2 - VERRUCOSA RHODOPHYTA; GROWTH; GIGARTINALES; TIKVAHIAE; PHOTOSYNTHESIS; NITROGEN; PIGMENT; TEMPERATURE; PHAEOPHYTA; SALINITY SO - Botanica Marina 2002 ;45(5):453-458 6348 UI - 12040 AU - Orgaz E AU - Gupta M AD - Univ Nacl Autonoma Mexico, Dept Fis & Quim Teorica, Mexico City 04510, DF, MexicoUniv Paris 11, Inst Sci Mat, UMR 8647, F-91405 Orsay, FranceOrgaz, E, Univ Nacl Autonoma Mexico, Dept Fis & Quim Teorica, Mexico City 04510, DF, Mexico TI - Electronic structure of the new manganese ternary hydride Mg3MnH7 AB - We have investigated the electronic structure of the new manganese hydride Mg3MnH7 by calculating ab initio the energy bands, density of states and the partial wave analysis of the density of states at each atomic site. We found that this hydride is an insulator with a large indirect energy gap of 2.56 eV. Partial wave analysis of the density of states shows that the electronic properties of this compound are strongly dominated by the bonding features of the MnH6 and Mg2H units. (C) 2002 Elsevier Science BY All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000173087800064 L2 - electronic structure;manganese ternary hydride;COMPLEX SO - Journal of Alloys and Compounds 2002 ;330():323-327 6349 UI - 9052 AU - Orjuela M AU - Titievsky L AU - Liu XH AU - Ponce-Castaneda MV AU - Ramirez-Ortiz M AU - Abramson D AU - Leal C AU - Mueller N AD - Columbia Univ, Mailman Sch Publ Hlth, New York, NY, USAInst Mexicano Seguro Social, Mexico City, DF, MexicoHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoWeill Cornell Med Coll, New York, NY, USAInst Nacl Pediat, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USA TI - Decreased maternal dietary folate and B6 intake during pregnancy as a risk factor for the development of sporadic retinoblastoma MH - Mexico|Distrito Federal MH - USA PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1055-9965 UR - ISI:000178634200126 SO - Cancer Epidemiology Biomarkers & Prevention 2002 ;11(10):1173S-1174S 6350 UI - 8936 AU - Orlov Y AU - Levaggi L AD - CICESE Res Ctr, Dept Elect, Ensenada, Baja California, MexicoUniv Genoa, Dipartimento Matemat, I-16146 Genoa, ItalyOrlov, Y, CICESE Res Ctr, Dept Elect, Ensenada, Baja California, Mexico TI - Discussion on: 'Infinite dimensional systems' sliding motions' by L.!Levaggi MH - Italy MH - Mexico|Baja California PB - PARIS: HERMES SCIENCE PUBLICATION RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Editorial Material AV - English IS - 0947-3580 UR - ISI:000181660000005 SO - European Journal of Control 2002 ;8(6):517-518 6351 UI - 10606 AU - Ornelas-Rodriguez M AU - Calixto S AU - Sheng YL AU - Turck C AD - Ctr Invest Opt, Leon 37000, Gto, MexicoUniv Laval, Dept Phys, Ctr Opt Photon & Laser, St Foy, PQ G1K 7P4, CanadaEcole Natl Super Chim, Dept Photochim Gen, F-68093 Mulhouse, FranceOrnelas-Rodriguez, M, Ctr Invest Opt, Apartado Postal 1-948, Leon 37000, Gto, Mexico TI - Thermal embossing of mid-infrared diffractive optical elements by use of a self-processing photopolymer master AB - Surface-relief transmissive diffractive elements were fabricated by embossing. The master was made by lithography with a self-developing photopolymer. The highly cross-linked structure exhibited by the polymer has made possible the direct replication by thermal embossing of polyethylene substrates. Fabricated elements are meant to work with mid-infrared radiation. The influence of some process variables, related to the performance of the diffractive elements, is analyzed. (C) 2002 Optical Society of America MH - Canada MH - France MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000177185800023 L2 - GRATINGS; SYSTEMS; DESIGN SO - Applied Optics 2002 ;41(22):4590-4595 6352 UI - 10862 AU - Oropeza N AU - Palomino G AU - Novelo A AU - Philbrick CT AD - Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Lab Citogenet, Inst Biol, Mexico City 04510, DF, MexicoWestern Connecticut State Univ, Dept Biol & Environm Sci, Danbury, CT 06810, USANovelo, A, Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Apartado Postal 70-233, Mexico City 04510, DF, Mexico TI - Karyomorphological studies in Oserya, Vanroyenella and Tristicha (Podostemaceae sensu lato) AB - Karyotype analyses of three Podostemaceae genera are reported for the first time. Somatic chromosome numbers were 2n = 28 (x = 14) for Oserya coulteriana Tul. and Vanroyenella plumosa Novelo and Philbrick (subfamily Podostemoideae). Their karyotypes were similar (13m + 1 sm chromosome pairs). The pantropical Tristicha trifaria (Bory ex Willdenow) Sprengel (subfamily Tristichoideae), with 2n = 20 (x = 10), had a karyotype of 10 m chromosome pairs. Although the karyotypes were homogeneous in the species studied, intergeneric variation of their genomes was evident in chromosome size and genome length. The largest chromosomes and genome lengths were found in O. coulteriana, while chromosomes of intermediate size occurred in V. plumosa. Tristicha trifaria had the smallest chromosomes. New data presented herein, combined with data from the published literature, indicates that Tristichoideae is uniform with x = 10 and that polyploidy is the principal mechanism of chromosome evolution. In contrast, in the Podostemoideae the main mechanism of evolution is aneuploidy. Podostemoideae possess a range of base numbers: x = 10, 13-15 and 17. Disploidy may be the underlying reason for such variation. Cytotaxonomic evidence supports the recognition of Podostemaceae s.s. and Tristichaceae as distinct families. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000176578000007 L2 - chromosome number;karyotype;Podostemaceae;Oserya;Vanroyenella;Tristicha;Mexico;MEXICAN PODOSTEMACEAE; RIVER-WEEDS SO - Aquatic Botany 2002 ;73(2):163-171 6353 UI - 9978 AU - Orozco A AU - Jeziorski MC AU - Linser PJ AU - Greenberg RM AU - Valverde R AD - Univ Florida, Whitney Lab, St Augustine, FL 32086, USAUniv Nacl Autonoma Mexico, Ctr Neurobiol, UNAM UAQ, Juriquilla 76230, Queretaro, MexicoOrozco, A, Univ Florida, Whitney Lab, 9505 Ocean Shore Blvd, St Augustine, FL 32086 USA TI - Cloning of the gene and complete cDNA encoding a type 2 deiodinase from Fundulus heteroclitus AB - Recently, we reported the cloning of a cDNA fragment from Fundulus heteroclitus liver encoding the open reading frame of type 2 deiodinase (FhD2). We here report the cloning of 14 kb of genomic sequence from F heteroclitus that includes the previously reported coding region of the E heteroclitus Dio2 gene (FhDio2), the 5' and 3' untranslated regions, and flanking regions and introns. This FhDio2 gene comprises two exons divided by a 4.8-kb intron. The position of the intron is similar to that of introns in other Dio2 genes. The analysis of approximately 1.3 kb of genomic sequence upstream of the mRNA start site revealed that, in contrast to mammalian Dio2 genes, there were no apparent TATA or CRE sequences. Nevertheless, a putative Sp1 site was found, similar to that in other F. heteroclitus TATA-less promoters. We have also cloned the complete FhD2 cDNA, which spans 4652bp and contains a sequence adjacent to its poly(A) tail that is highly similar to the selenocysteine insertion sequence (SECIS) found in human D2 cDNA. The expression of a construct containing the FhD2 ORF plus the native SECIS resulted: in a protein with deiodinase activity similar to that of the native FhD2. Analysis of the regulation of this gene, combined with ongoing studies of the F. heteroclitus D1 gene, will allow us to elucidate the functions of the colocalized deiodinases in teleost liver. (C) 2002 Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0016-6480 UR - ISI:000178785900009 L2 - III IODOTHYRONINE DEIODINASE; TATA-LESS PROMOTER; GENOMIC ORGANIZATION; PROXIMAL PROMOTER; SALMO-GAIRDNERI; GROWTH-HORMONE; RAINBOW-TROUT; EXPRESSION; TRANSCRIPTION; REGION SO - General and Comparative Endocrinology 2002 ;128(2):162-167 6354 UI - 9835 AU - Orozco I AU - Ortiz L AU - Elorza MV AU - Ruiz-Herrera J AU - Sentandreu R AD - Univ Valencia, Fac Farm, Seccio Dept Microbiol, Valencia 46100, SpainIPN, Ctr Invest & Estudios Avanzados, Irapuato, GTO, MexicoSentandreu, R, Univ Valencia, Fac Farm, Seccio Dept Microbiol, Vicent Andres Estelles S-N, Valencia 46100, Spain TI - Cloning and characterization of PRB1, a Candida albicans gene encoding a putative novel endoprotease B and factors affecting its expression AB - Several cDNA fragments corresponding to transcripts differentially expressed under conditions that favor mycelial growth of Candida albicans were identified by the "differential display" technique. One of these was cloned and used as a probe to rescue the full gene from a genomic library of the fungus. The sequence identified a single, uninterrupted open reading frame of 1395 nucleotides encoding a putative protein of 465 residues and a theoretical molecular weight of 50.3 kDa, present in the genome as a single copy located at chromosome 2 in different strains. The gene product showed high homology with subtilisin-like proteases, mainly PRBI, the vacuolar B protease from Saccharomyces cerevisiae, and for this reason it was designated as a putative CaPRBI. Expression of the gene was not directly related to fungal morphogenesis, but to the initial response to inducers: Heat shock and the presence of N-acetyl glucosamine. It was also subject to nitrogen, but not to carbon catabolite repression, although glucose inhibited the GlcNAc stimulatory effect. The gene was, in our hands, unable to complement PRBI mutation in S. cerevisiae. C. albicans prb null mutants did not show any distinct alteration in the phenotype. CaPRBI is the first gene coding for a putative vacuolar serine protease cloned from C. albicans. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0923-2508 UR - ISI:000179194800009 L2 - Candida albicans;differential display;PRB1 null mutants, construction;overexpressing prb1 strains;factors controlling expression of CaPRB1;generation of PRB1 by PCR;SACCHAROMYCES-CEREVISIAE; DIFFERENTIAL DISPLAY; SERINE PROTEASES; SEQUENCE; COMPLEMENTATION; PURIFICATION; PROTEINASE; DNA SO - Research in Microbiology 2002 ;153(9):611-620 6355 UI - 11770 AU - Orta-Salazar G AU - Bouchard RA AU - Morales-Salgado F AU - Salinas-Stefanon EM AD - Benemerita Univ Autonoma Puebla, Inst Fisiol, Puebla, MexicoSalinas-Stefanon, EM, Torys Barristare & Solicitors, T D Ctr, Maritime Life Tower,Suite 300,79 Wellington St W, Toronto, ON M5K 1N2, Canada TI - Inhibition of cardiac Na+ current by primaquine AB - 1 The electrophysiological effects of the anti-malarial drug primaquine on cardiac Na+ channels were examined in isolated rat ventricular muscle and myocytes. 2 In isolated ventricular muscle, primaquine produced a dose-dependent and reversible depression of dV/dt during the upstroke of the action potential. 3 In ventricular myocytes, primaquine blocked I-Na(+) in a dose-dependent manner, with a K-d of 8.2 muM. 4 Primaquine (i) increased the time to peak current, (ii) depressed the slow time constant of I-Na(+) inactivation, and (iii) slowed the fast component for recovery of I-Na(+) from inactivation. 5 Primaquine had no effect on: (i) the shape of the I-V curve, (ii) the reversal potential for Na+, (iii) the steady-state inactivation and g(Na)(+) Curves, (iv) the fast time constant of inactivation of I-Na(+), and (v) the slow component of recovery from inactivation. 6 Block of I-Na(+) by primaquine was use-dependent. Data obtained using a post-rest stimulation protocol suggested that there was no closed channel block of Na+ channels by primaquine. 7 These results suggest that primaquine blocks cardiac Na+ channels by binding to open channels and unbinding either when channels move between inactivated states or from an inactivated state to a closed state. 8 Cardiotoxicity observed in patients undergoing malaria therapy with aminoquinolines may therefore be due to block of Na+ channels, with subsequent disturbances of impulse conductance and contractility MH - Canada MH - Mexico|Puebla PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000173869000019 L2 - primaquine;Na+ channel;voltage-clamp;cardiac myocytes;DEPENDENT SODIUM-CHANNELS; VENTRICULAR MYOCYTES; RAT VENTRICLE; POTASSIUM CHANNEL; QUINIDINE; BLOCK; CHLOROQUINE; STATE; CELLS; 4-AMINOPYRIDINE SO - British Journal of Pharmacology 2002 ;135(3):751-763 6356 UI - 10024 AU - Ortega-Mayagoitia E AU - Rodrigo MA AU - Rojo C AU - varez-Cobelas M AD - CSIC, Ctr Ciencias Medioambientales, E-28006 Madrid, SpainUniv Valencia, Inst Cavanilles Biodiversidad & Biol Evolut, E-46071 Valencia, SpainOrtega-Mayagoitia, E, Univ Nacl Autonoma Mexico, Lab Limnol, CyMA, UIICSE,FES Iztacala, Av Barrios 1, Tlalnepantla 54090, Mexico TI - Picoplankton dynamics in a hypertrophic semiarid wetland AB - This study was carried out on a neglected component of wetlands: the picoplankton community. We analyzed the picoplanktonic community patterns and their related environmental factors in a hypertrophic semi-arid wetland located in Central Spain (Las Tablas de Daimiel National Park, TDNP). We determined the bacterial and autotrophic picoplankton (APP) abundance over a three-year period (1996: the end of a long drought period and 1997-1998: after flooding) in five sites of the wetland. The overall range of bacterial abundance was 0.2 x 10(6) to 10 x 10(6) cells/ml. The annual mean abundance increased in the wettest 1997. APP was composed mainly by coccoid phycocyanin-containing cyanobacteria, with the greatest abundance up to 25 X 101 cells/ml. The annual mean also increased considerably in wetter 1997-98. Despite the large APP biomass in some sites, its percentage of total phytoplankton biomass was low (the annual average did not exceed 1.5%). We observed spatial heterogeneity in the picoplankton fraction depending on the fluctuating hydrology: bacteria tends to spatial homogeneity after flooding while APP showed only similarity among the output sites. Among the considered predictive variables (temperature, phosphorus, nitrogen, zooplankton, phytoplankton) of the picoplanktonic dynamics, temperature was the most closely correlated to picoplankton, especially to bacterial abundance. Further, in two factorial, coupled-hierarchical laboratory experiments (constant temperature), we searched for control mechanisms of picoplankton. We tested (a) the trophic cascade hypothesis by analyzing the effect of presence/absence of mosquitofish (experiment 1) or directly modifying the zooplanktonic community (experiment 2) and (b) the bottom-up regulation by altering the nutrient conditions (presence/absence of sediment in experiment 1; reducing the nutrient content in experiment 2). Bacterioplankton failed to show any behavior related to trophic cascade direct effects, while nutrients increased its abundance. APP was affected positively by nutrients and negatively by zooplankton grazing MH - Mexico|Estado De Mexico MH - Spain PB - LAWRENCE: SOC WETLAND SCIENTISTS RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0277-5212 UR - ISI:000178600900013 L2 - bacteria;filamentous bacteria;autotrophic picoplankton;wetlands;top-down control;bottom-up control;microcosm experiments;MICROBIAL FOOD-WEB; COMMUNITY STRUCTURE; AUTOTROPHIC PICOPLANKTON; HETEROTROPHIC BACTERIA; PRIMARY PRODUCTIVITY; VERTICAL DIFFERENCE; LAKE BIWA; FRESH; BACTERIOPLANKTON; PHYTOPLANKTON SO - Wetlands 2002 ;22(3):575-587 6357 UI - 9397 AU - Ortega C AU - de Oca RM AU - Groman D AU - Yason C AU - Nicholson B AU - Blake S AD - Univ Prince Edward Isl, Atlantic Vet Coll, Aquat Diagnost Serv, Cornwall, PE C1A 4P3, CanadaUniv Autonoma Estado Mexico, Ctr Invest & Estudios Avanzados Salud Anim, Toluca, MexicoUniv Maine, Dept Biochem Microbiol & Mol Biol, Orono, ME 04469, USAGroman, D, Univ Prince Edward Isl, Atlantic Vet Coll, Aquat Diagnost Serv, Cornwall, PE C1A 4P3, Canada TI - Case report: Viral infectious pancreatic necrosis in farmed rainbow trout from Mexico AB - This case report provides pathologic and confirmatory diagnostic documentation of the first reported clinical epizootic of infectious pancreatic necrosis (IPN) in farmed rainbow trout Oncorhynchus mykiss from central Mexico. Both the gross and microscopic pathology were consistent with IPN. A virus was isolated in cell culture with the cytopathic effect typical of the IPN virus (IPNV). Positive identification as IPNV was achieved by means of an IPNV-specific indirect fluorescent antibody test and reverse transcription-polymerase chain reaction. Further genotyping identified this isolate as the Buhl strain of IPNV, which is a member of the West Buxton (Al) serotype of aquatic birnavirus serogroup A MH - Canada MH - Mexico|Estado De Mexico MH - USA PB - BETHESDA: AMER FISHERIES SOC RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Veterinary Sciences U5 - J;Article AV - English IS - 0899-7659 UR - ISI:000180443600010 L2 - AQUATIC BIRNAVIRUSES; ATLANTIC SALMON; VIRUS; IDENTIFICATION SO - Journal of Aquatic Animal Health 2002 ;14(4):305-310 6358 UI - 9589 AU - Ortega J AU - Maldonado JE AU - Arita HT AU - Wilkinson GS AU - Fleischer RC AD - Smithsonian Inst, Genet Lab, Natl Museum Natl Hist, Washington, DC 20008, USAUniv Maryland, Dept Biol, College Pk, MD 20742, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoOrtega, J, Smithsonian Inst, Genet Lab, Natl Museum Natl Hist, 3001 Connecticut Ave NW, Washington, DC 20008 USA TI - Characterization of microsatellite loci in the Jamaican fruit-eating bat Artibeus jamaicensis and cross-species amplification AB - Artibeus jamaicensis is one of the most common bat species in the neotropics, with a well-defined polygynous social structure in caves. In order to study behaviour and to examine patterns of paternity and relatedness between different harem groups, we developed 14 microsatellite loci from two different enriched genomic libraries. We screened 125 individuals from two different bat colonies and found that polymorphism ranged from five to 13 alleles. Heterozygosity ranged from 63 to 95%. The primers amplified across 14 bat species, indicating their potential utility for population-level studies in several closely related bat species MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000179678400026 L2 - Artibeus jamaicensis;cross-species amplification;heterozygosity;microsatellite;Phyllostomidae SO - Molecular Ecology Notes 2002 ;2(4):462-464 6359 UI - 10132 AU - Ortega MJ AU - Zubia E AU - Rodriguez S AU - Carballo JL AU - Salva J AD - Univ Cadiz, Dept Quim Organ, Fac Ciencias Mar & Ambientales, Puerto Real 11510, Cadiz, SpainUNAM, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoZubia, E, Univ Cadiz, Dept Quim Organ, Fac Ciencias Mar & Ambientales, Apdo 40, Puerto Real 11510, Cadiz, Spain TI - Muricenones A and B: New degraded pregnanes from a gorgonian of the genus Muricea AB - The gorgonian Muricea sp. contains two new degraded pregnanes, muricenones A (1) and B (2), whose structures have been defined by spectroscopic analysis. The uncommon carbon framework of muricenones may be biosynthetically derived by oxidative cleavage and loss of one carbon atom of the A-ring of the steroidal nucleus. The new compounds, I and 2, isolated from Muricea sp., selectively inhibit the growth of the A-549 human lung carcinoma cell line. ((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002) MH - Mexico|Sinaloa MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000178501100004 L2 - natural products;octocorals;steroids;structure elucidation;cytotoxicity;SOFT CORAL; ASTERIAS-FORBESI; APLYSIA-FASCIATA; GLYCOSIDE; SPONGE; STEROL; DERIVATIVES; CAPNELLA SO - European Journal of Organic Chemistry 2002 ;(19):3250-3253 6360 UI - 9653 AU - Ortiz-Pulido R AU - Peterson AT AU - Robbins MB AU - Diaz R AU - Navarro-Siguenza AG AU - Escalona-Segura G AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Veracruzana, Fac Biol, Xalapa 91000, Veracruz, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoColegio Frontera Sur, Campeche 24000, MexicoOrtiz-Pulido, R, Univ Autonoma Hidalgo, Ctr Invest Biol, AP 69, Pachucha 42001, Hidalgo, Mexico TI - The Mexican Sheartail (Doricha eliza): Morphology, behavior, distribution, and endangered status AB - We reviewed morphological variation, taxonomic status, geographic distribution, ecology, and behavior of the poorly known hummingbird, the Mexican Sheartail (Doricha eliza), based on museum specimens and field studies. Although the broadly disjunct distribution of the species would suggest that two taxa are involved, morphological differences between the populations appear minor, not deserving of formal taxonomic recognition. Ecological differences between the two populations are stronger, however; modeled ecological niches are nearly nonoverlapping, and ontogenetic and behavioral differences may exist. We recommend that, given its extremely restricted distribution, the Veracruz population be considered critically endangered, whereas the Yucatan population be designated as having a restricted range and accorded near-threatened status MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Mexico|Veracruz MH - USA PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000179535600001 L2 - GEOGRAPHIC DISTRIBUTIONS; NICHE; PREDICTION; BIRDS SO - Wilson Bulletin 2002 ;114(2):153-160 6361 UI - 10067 AU - Ortiz I AU - Alonso P AU - Urtiaga A AD - Univ Cantabria, ETSII, Dept Ingn Quim & Quim Inorgan, E-39005 Santander, SpainUniv Autonoma San lUis Potosi, Fac Ciencias Quim, San Luis Potosi, MexicoOrtiz, I, Univ Cantabria, ETSII, Dept Ingn Quim & Quim Inorgan, Avda Castros S-N, E-39005 Santander, Spain TI - Pervaporation of azeotropic mixtures ethanol/ethyl tert-butyl ether: influence of membrane conditioning and operation variables on pervaporation flux AB - This work reports the pervaporative separation of ethanol from ethanol-ethyl ter butyl ether mixtures using a commercial membrane, PERVAP 2256, that previously showed an interesting behavior in the separation of methanol-MTBE mixtures. Pervaporation flux has been obtained and analyzed as a function of feed composition in the range of ethanol concentration of 30-50 wt % and temperature in the range of 50-70degreesC whereas permeate pressure was kept constant in all the experiments and equal to 3 mmHg. Pervaporation fluxes showed an exponential dependence with both variables, that in the case of temperature fitted to an Arrhenius type expression. Achievement of steady state conditions referred to the pervaporation flux needed of long times that depended on the previous history of the membrane; thus new membranes needed a long conditioning period before reaching steady state that was considerably shortened in subsequent changes of the operation conditions MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Chemical;Water Resources U5 - J;Article AV - English IS - 0011-9164 UR - ISI:000178585600012 L2 - ethanol;ETBE;pervaporation flux;PERVAP 2256;VAPOR-LIQUID-EQUILIBRIA; ETHYL-TERT; BINARY-MIXTURES; SEPARATION; ETBE SO - Desalination 2002 ;149(1-3):67-72 6362 UI - 10896 AU - Ortiz R AU - Echeverria OM AU - Ubaldo E AU - Carlos A AU - Scassellati C AU - Vazquez-Nin GH AD - UNAM, Fac Sci, Dept Cell Biol, Electron Microscopy Lab, Mexico City, DF, MexicoUniv Lausanne, Ctr Electron Microscopy, CH-1005 Lausanne, SwitzerlandVazquez-Nin, GH, UNAM, Fac Sci, Dept Cell Biol, Electron Microscopy Lab, Apartado Postal 70-438, Mexico City, DF, Mexico TI - Cytochemical study of the distribution of RNA and DNA in the synaptonemal complex of guinea-pig and rat spermatocytes AB - The distribution of DNA and RNA in the synaptonemal complex and related structures, was studied using high resolution cytochemical methods and in situ hybridization, in guinea pig and rat testis. Serial sectioning demonstrates that frequently the formation of the synaptonemal complex (SC) occurs without a previous development of isolated chromosomal axes. The lateral elements of the forming SC are in continuity with pairs of DNA-containing thin filaments. These chromatin filaments fold in numerous short loops just before incorporating to the lateral elements. Some of these loops are included in the ribbon-like structure of the lateral elements of the mature SC. We propose that these short loops contain the DNA attachment sequences associated with the proteins of the LE. During the formation of the SC one of the two chromatin filaments incorporates at the central surface of the forming lateral element (LE) and the other is located at the external side of the LE. This unexpected distribution does not correspond to the pair of thick filaments previously discerned in structure of the LE. The presence of RNA associated with the DNA-containing thin filaments, as well as with the axial chromatin elements of the forming SC, may be related with the transcription occurring during meiotic prophase, specially during zygotene stage. We propose that RNA is involved in a still uncharacterized process essential for pairing MH - Mexico|Distrito Federal MH - Switzerland PB - PAVIA: LUIGI PONZIO E FIGLIO RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology U5 - J;Article AV - English IS - 1121-760X UR - ISI:000176277200003 L2 - mammalian testis;ribonucleoprotein;meiosis;in situ hybridization;electron microscopy;DROSOPHILA-MELANOGASTER FEMALES; MEIOTIC PROPHASE; SACCHAROMYCES-CEREVISIAE; RECOMBINATION NODULES; SYNAPTINEMAL COMPLEX; CHROMOSOME SYNAPSIS; MEIOSIS; YEAST; LOCALIZATION; PACHYTENE SO - European Journal of Histochemistry 2002 ;46(2):133-142 6363 UI - 9681 AU - Ortiz RMA AU - Galina MA AU - Carmona MMA AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Dept Ciencias Pecuaris, Cuautitlan 54720, MexicoUniv Aberdeen, Aberdeen, ScotlandGalina, MA, Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Dept Ciencias Pecuaris, Campo 4,Carretera Cuautitlan Teoloyucan Km 3-5, Cuautitlan 54720, Mexico TI - Effect of a slow non-protein nitrogen ruminal supplementation on improvement of Cynodon nlemfuensis or Brachiaria brizanta utilization by Zebu steers AB - An observation was carried out over 120 days to measure the effect of slow intake urea supplementation on Zebu steers grazing on Star (Cynodon nwlemfuensis) or Insurgent (Brachiaria brizanta) grass in the dry season. In experiment A (treatment 1): 40 steers (213+/-6 kg BW) grazing Cynodon were supplemented with 1.8 kg DM of slow intake urea supplement (SIUS). This supplement was a mixture of molasses (16.0%), urea (4.0%), salt (3.0%), orthophosphate (2.0%), limestone (3.0%), cottonseed meal (22.0%), rice polishing (12.0%), corn (11.0%), poultry litter (9.0%), mineral salts (1.5%), ammonium sulfate (0.5%), fish meal (3.0%), cement kiln dust (2.0%) and animal lard (11.0%). Steers in treatment 2 (n = 12; 214+/-4 kg BW) grazing Cynodon were supplemented with 2.7 kg DM of commercial concentrate (CC). It was made up of 28.0% corn, 38.0% wheat flour, 5.0% fishmeal, 25.0% cottonseed meal, 2.0% orthophosphate and 2.0% mineral salts. In experiment B (treatment 1), there were 40 steers (214 6 kg BW) grazing Brachiaria supplemented with 1.8 kg DM SIUS. In the second treatment, there were 12 animals (217+/-4 kg BW) grazing Brachiaria plus 2.7 kg DM CC. Each group had a ruminal fistulated animal to measure intake. All steers were under intensive mobile grazing. Stocking rates varied from 3.6 to 5.9 AU/ha and instant stocking rate from 57.0 to 93.3 AU/ha. At all times, grass was available exceeding the VDMI. Results were analyzed by ANOVA (P < 0.05). Analysis among treatments was performed with the Schaffe test (a = 0.05). Results in experiment A show body weight gains (BWG) of 851+/-15 g/day for treatment 1; 819+/-29 g/day were obtained in treatment 2; 910+/-21 and 843+/-32 g/day for the animals in experiment B: treatment 1 and 2, respectively. Only experiment B showed statistical differences (P < 0.05). VDMI was 3 and 2.7% BW for treatments 1 and 2 in the experiment A, and 3.2 and 2.8% BW for treatment 1 and 2 in experiment B. In the present study, SIUS was successfully used as supplement made with local feeds to steers grazed on regional forages on a profitable performance. Supplementation of 1.8 kg/M SIUS amounted to US$0.34 compared with 2.7 kg/DM CC added at US$0.63 per day. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Estado De Mexico MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0301-6226 UR - ISI:000179597400006 L2 - beef cattle;feeding and nutrition;nitrogen supplementation;BARLEY STRAW; FEED-INTAKE; CATTLE; UREA; DIGESTIBILITY; LIVEWEIGHT; ROUGHAGES; PASTURE; DIETS; SHEEP SO - Livestock Production Science 2002 ;78(2):125-131 6364 UI - 10353 AU - Osorio-Diaz P AU - Bello-Perez LA AU - gama-Acevedo E AU - Vargas-Torres A AU - Tovar J AU - Paredes-Lopez O AD - IPN, Ctr Desarrollo Prod Bioticos, Yautepec 62731, Morelos, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041A, VenezuelaIPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Guanajuato 36500, MexicoBello-Perez, LA, IPN, Ctr Desarrollo Prod Bioticos, Km 8-5 Carr Yautepec Jojutla,Colonia San Isidro,A, Yautepec 62731, Morelos, Mexico TI - In vitro digestibility and resistant starch content of some industrialized commercial beans (Phaseolus vulgaris L.) AB - Commercial bean products were studied in terms of chemical composition and starch digestibility. In general, commercial cooked flours did not show differences in protein and ash contents. Canned beans also did not show statistical differences (alpha = 0.05) in protein, but they were different in ash, perhaps due to botanical variety. Lipid content varied in the different flours, due to the formulation used in their preparation, whereas the canned bean samples had similar lipid values. Canned samples had the highest available starch (AS) values. These results suggest that the drying of samples decreases AS. Canned beans had the lowest total resistant starch (RS) values, and the flours obtained from canned seeds had the highest. These results agree with AS content in the samples. Retrograded resistant starch (RS type 3) showed the same pattern as RS (type 2 +type 3), but with lower absolute values. The in vitro alpha-amylolysis rate for canned beans and commercial flours was lower than for samples dried in the laboratory. Thus, the additional drying step increased the hydrolysis rate of the samples. Therefore, depending on the specific dietetic use of beans, appropriate processing methods and formulations are needed. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Guanajuato MH - Mexico|Morelos MH - Venezuela PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000177866700008 L2 - resistant starch;beans;starch hydrolysis;legumes;chemical composition;SMALL-INTESTINE; GLYCEMIC-INDEX; STEAM-COOKING; BLOOD-GLUCOSE; DIGESTION; LEGUMES; FLOURS; FOOD; AVAILABILITY; HYDROLYSIS SO - Food Chemistry 2002 ;78(3):333-337 6365 UI - 9645 AU - Osorio MA AU - Glover F AU - Hammer P AD - Autonomous Univ Puebla, Sch Comp Sci, Puebla 72560, MexicoUniv Mississippi, Sch Business, Hearin Ctr Enterprise Sci, University, MS 38677, USARutgers State Univ, Rutgers Ctr Operat Res, Piscataway, NJ 08854, USAOsorio, MA, Autonomous Univ Puebla, Sch Comp Sci, Puebla 72560, Mexico TI - Cutting and surrogate constraint analysis for improved multidimensional knapsack solutions AB - We use surrogate analysis and constraint pairing in multidimensional knapsack problems to fix some variables to zero and to separate the rest into two groups - those that tend to be zero and those that tend to be one, in an optimal integer solution. Using an initial feasible integer solution, we generate logic cuts based on our analysis before solving the problem with branch and bound. Computational testing, including the set of problems in the OR-library and our own set of difficult problems, shows our approach helps to solve difficult problems in a reasonable amount of time and, in most cases, with a fewer number of nodes in the search tree than leading commercial software MH - Mexico|Puebla MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0254-5330 UR - ISI:000179770500005 L2 - multidimensional knapsack problem;surrogate constraints;duality;constraint pairing;logic cuts;RIGHT-HAND SIDES; ZERO-ONE; GENERATING CUTS; TABU SEARCH; GROWTH; ALGORITHMS SO - Annals of Operations Research 2002 ;117(1-4):71-93 6366 UI - 10596 AU - Ostroumov M AU - Fritsch E AU - Faulques E AU - Chauvet O AD - Univ Michoacana, Dept Mineral, Inst Met, Morelia, Michoacan, MexicoUniv Nantes, Inst Mat Jean Rouxel, F-44322 Nantes, FranceOstroumov, M, Univ Michoacana, Dept Mineral, Inst Met, CP 58000, Morelia, Michoacan, Mexico TI - Spectrometric study of lazurite from the Pamir region of Tajikistan AB - The resonance Raman spectrum of lazurite from the Pamir region of Tajikistan has been obtained by the use of 457.9, 488, 514.5, 676 and 1064 nm excitations. The Raman bands are attributed to S-2(-), S-3(-) and SO4- sulfur radicals. The vibrational progression of the S-2(-) radicals is observed only with the 457.9 nm excitation, whereas two progressions of the S-3(-) centers take place with the 514 nm excitation. The bands of the SO4- radicals have maximum intensity with 676 and 1064 nm excitations. Ultraviolet-visible (UV-VIS), infrared (IR) and electron spin resonance (ESR) spectra confirm the presence of these molecular centers MH - France MH - Mexico|Michoacan PB - OTTAWA: MINERALOGICAL ASSOC CANADA RP - NOT IN FILE U3 - TC 3 U4 - Mineralogy U5 - J;Article AV - French IS - 0008-4476 UR - ISI:000177081400008 L2 - lazurite;Raman spectrometry;molecular sulfur radicals;Pamir;Tajikistan;RADICAL-ANIONS; SODALITE; STATE SO - Canadian Mineralogist 2002 ;40():885-893 6367 UI - 11171 AU - Ostroumov M AU - Faulques E AU - Lounejeva E AD - Univ Nantes, Inst Mat Jean Rouxel, F-44322 Nantes, FranceUniv Michoacana, Inst Met, Dept Mineral, Morelia 58000, Michoacan, MexicoUniv Mexico, Inst Geol, Mexico City 04510, DF, MexicoFaulques, E, Univ Nantes, Inst Mat Jean Rouxel, 2 Rue Houssiniere,BP 32229, F-44322 Nantes, France TI - Raman spectroscopy of natural silica in Chicxulub impactite, Mexico AB - A series of natural silica impactite samples from Chicxulub (Mexico) was investigated by Raman microprobe (RMP) analysis. The data yield evidence for high-pressure shock metamorphism in the rock. The impactite contains three polymorphs of silica: the original alpha-quartz, and two high-pressure varieties - coesite and disordered quartz representing various degrees of crystallinity. We found systematic changes in frequencies and half-widths of the Raman bands, caused by increasing irregularities of bond-lengths and bond-angles and a general breaking-up of the structure as a result of impact events. Therefore, RMP is an adequate tool for measuring the crystallinity of disordered quartz. The half-width F and the frequency a) of the symmetric Si-O-Si stretching vibrational band (A, mode) of the SiO4 tetrahedra are the most amenable parameters for estimating the degree of crystallinity. In well-crystallized quartz, Gamma = 5 cm(-1) and omega = 464 cm(-1), while in highly disordered quartz this line shifts up to omega = 455 cm(-1) and broadens up to Gamma = 30 cm(-1). The Raman lineshapes appear to depend strongly on the degree of lattice disorder subsequent to impact events MH - France MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1631-0713 UR - ISI:000175561200004 L2 - Raman spectroscopy;impactite Chicxulub;disordered quartz;Mexico;SPECTRA; CRISTOBALITE; COESITE; GLASSES; SIO2 SO - Comptes Rendus Geoscience 2002 ;334(1):21-26 6368 UI - 11579 AU - Osuna-Flores I AU - Riva MC AD - Univ Guadalajara, Univ Ctr Coastal Soud, Jalisco 48980, MexicoUniv Politecn Cataluna, INTEXTER, Text Res Inst, Lab Environm Toxicol, Terrassa 08222, SpainRiva, MC, Univ Guadalajara, Univ Ctr Coastal Soud, Jalisco 48980, Mexico TI - Organochlorine pesticide residue concentrations in shrimps, sediments, and surface water from Bay of Ohuira, Topolobampo, Sinaloa, Mexico MH - Mexico|Jalisco MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000174524900011 L2 - LAGOONS SO - Bulletin of Environmental Contamination and Toxicology 2002 ;68(4):532-539 6369 UI - 9772 AU - Osuna MR AU - Aguirre G AU - Somanathan R AU - Molins E AD - Ctr Grad & Invest, Inst Tecnol Tijuana, Tijuana 22000, BC, MexicoCSIC, Inst Ciencia Mat Barcelona, Cerdanyola Del Valles 08193, Barcelona, SpainSomanathan, R, Ctr Grad & Invest, Inst Tecnol Tijuana, Apartado Postal 1166, Tijuana 22000, BC, Mexico TI - Asymmetric synthesis of amathamides A and B: novel alkaloids isolated from Amathia wilsoni AB - Syntheses of the amathamides A and B ((2S)-N-[(E and Z)-2(2,4-dibromo-5-methoxyphenylethenyl]-1-methyl-2-pyrrolinecarboxamide s), new alkaloids isolated from the Tasmanian marine bryozoan Amathia wilsoni, were accomplished by a sequence of reactions starting from 3-hydroxybenzaldehyde. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000179311300014 L2 - KIRKPATRICK; INHIBITOR SO - Tetrahedron-Asymmetry 2002 ;13(20):2261-2266 6370 UI - 10557 AU - Otazo-Sanchez E AU - Ortiz-del-Toro P AU - Estevez-Hernandez O AU - Perez-Marin L AU - Goicoechea I AU - Beltran AC AU - Villagomez-Ibarra JR AD - Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42074, MexicoUniv La Habana, Inst Mat & Reactivos, Havana 10400, CubaInst Tecnol Toluca, Toluca 52140, MexicoOtazo-Sanchez, E, Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Carretera Pachuca Tulancingo Km 4-5,Colonia Ciuda, Pachuca 42074, Mexico TI - Aroylthioureas: new organic ionophores for heavy metal ion selective electrodes. A nuclear magnetic resonance study AB - The H-1 and C-13 NMR spectra of four series of 1-aroylthiourea derivatives in DMSO-d(6) are reported. The NH signals for 3-alkyl substituted aroylthioureas are identified by their multiplicity and by homonuclear irradiation experiments. Correlation analyzes are made for NH, CO and CS signals in order to determine the best way to modulate the nucleophilic character of the CS group, as thioureas are well-known ionophore groups. Almost all 1,3-substituted thioureas (Series 2-4) show the reported chelated structure with the exception of those with CF3, CN and NO, groups. Pyridine group promote a different equilibrium in solution. The fragment -CO-NH- transmits poorly the electronic effects of substituents in the aroylgroup. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Hidalgo MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000177181100025 L2 - H-1 NMR;C-13 NMR;thioureas;aroylthioureas;correlation analysis;BULK OPTODES; SENSORS SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2002 ;58(10):2281-2290 6371 UI - 10009 AU - Ottemoller L AU - Shapiro NM AU - Singh SK AU - Pacheco JF AD - Univ Bergen, Inst Solid Earth Phys, Bergen, NorwayUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoOttemoller, L, British Geol Survey, Murchison House, W Mains Rd, Edinburgh EH9 3LA, Midlothian, Scotland TI - Lateral variation of Lg wave propagation in southern Mexico AB - [1] In this study we investigated lateral variation of Lg wave propagation in southern Mexico from recordings of 92 crustal earthquakes along 591 travel paths. The efficiency of Lg propagation was measured in terms of Lg to Pn spectral ratio. It was found that Lg propagation is inefficient for travel paths through the Gulf of Mexico coastal plains and the Gulf of Tehuantepec, areas with thick layers of sediments. An average Lg quality factor, Q(Lg), as a function of frequency for southern Mexico was estimated for the efficient Lg travel paths. The relation obtained for QLg in the frequency range 1.6-8 Hz is Q(Lg) (f)= 204f(0.85). The lateral variation of Q(Lg)(-1) was solved as a mixed-determined inverse tomography problem, separately for each frequency, in which a spatial smoothness constraint was imposed and a priori information was added in poorly covered regions. The spatial resolution obtained was about 200 km. It was found that the Trans-Mexican Volcanic Belt, the Gulf of Mexico coastal plains, and the area east of 94 Ware characterized by lower than average Q(Lg) values, i.e., higher attenuation. High Q(Lg) values were obtained for the Mixteco-Oaxaca terranes, while for the Guerrero terrane, values similar to the average were obtained. The results show a correlation between Q(Lg) and crustal structure and provide valuable information on lateral variation of Q(Lg), which is needed for reliable prediction of ground motion during future earthquakes MH - Mexico|Distrito Federal MH - Norway MH - United Kingdom PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000178909600020 L2 - REGIONAL SEISMIC PHASES; CONTINENTAL UNITED-STATES; CRUSTAL HETEROGENEITY; NORTH-SEA; CODA-Q; SUBDUCTION ZONE; 1985 MICHOACAN; SOURCE SPECTRA; S-WAVES; ATTENUATION SO - Journal of Geophysical Research-Solid Earth 2002 ;107(B1): 6372 UI - 9893 AU - Ovalle F AU - Ovalle-Berumen JF AD - Univ Alabama, Sch Med, Dept Med, Div Endocrinol & Metab, Birmingham, AL 35294, USAUniv Autonoma Nuevo Leon, Dept Med, Monterrey, MexicoOvalle, F, Univ Alabama, Sch Med, Dept Med, Div Endocrinol & Metab, 1808 7th Ave S,BDB 813, Birmingham, AL 35294 USA TI - Thiazolidinediones: A review of their benefits and risks AB - Several new drugs have become available for the treatment of type 2 diabetes mellitus in the past few years, and among them the thiazolidinediones are probably the most promising and interesting. Their mechanism of action involves a reduction in insulin resistance while simultaneously improving some of the independent risk factors for cardiovascular disease frequently found in patients with type 2 diabetes mellitus. On the other hand, while they might have many advantages over the other available antihyperglycemic agents, there are still some concerns about their long-term safety. Consequently, while awaiting the results of the planned long-term cardiovascular outcome studies, which will help establish their true benefits and risks, physicians must remain skeptical about these drugs and consider not only their claimed advantages, but also their not-so-well-publicized risks. This article summarizes the known and/or presumed beneficial and toxic effects of these drugs MH - USA MH - Mexico|Nuevo Leon PB - BIRMINGHAM: SOUTHERN MEDICAL ASSN RP - NOT IN FILE U3 - TC 9 U4 - Medicine, General & Internal U5 - J;Review AV - English IS - 0038-4348 UR - ISI:000178898200016 L2 - ACTIVATED RECEPTOR-GAMMA; TYPE-2 DIABETES-MELLITUS; POLYCYSTIC-OVARY-SYNDROME; HUMAN BREAST-CANCER; HEPATIC-FAILURE; INSULIN ACTION; PPAR-GAMMA; PHARMACOLOGICAL THERAPY; FAT DISTRIBUTION; ADIPOSE-TISSUE SO - Southern Medical Journal 2002 ;95(10):1188-1194 6373 UI - 11765 AU - Ozawa L AU - Sheinbaum C AU - Martin N AU - Worrell E AU - Price L AD - Univ Nacl Autonoma Mexico, Inst Ingn, Coyoacan 04510, MexicoLawrence Berkeley Natl Lab, Energy Anal Dept, Berkeley, CA 94720, USASheinbaum, C, Univ Nacl Autonoma Mexico, Inst Ingn, Ciudad Univ,Apdo Postal 70-472, Coyoacan 04510, Mexico TI - Energy use and CO2 emissions in Mexico's iron and steel industry AB - Energy use and carbon dioxide emissions for the Mexican iron and steel industry are analyzed from 1970 to 1996. To assess the trends in energy use and carbon dioxide emissions, we used a decomposition analysis based on physical indicators to decompose the intra-sectoral structural changes and efficiency improvements. We used a structure/efficiency analysis for international comparisons, considering industrial structure and the best available technology. This study shows that steel production growth drove up primary energy use by 211% between 1970 and 1996, while structural changes (production and process mix) decreased primary energy use by 12% and energy efficiency changes drove down energy use by 51%. In addition, carbon dioxide emissions would have increased by 9% if the primary fuel mix had remained constant at 1970 levels. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Energy & Fuels U5 - J;Article AV - English IS - 0360-5442 UR - ISI:000173916900002 L2 - DECOMPOSITION SO - Energy 2002 ;27(3):225-239 6374 UI - 8686 AU - Pacheco-Alvarez D AU - Solorzano-Vargas S AU - Velazquez A AU - Zempleni J AU - Leon-Del-Rio A AD - UNAM, Dept Mol Biol, Mexico City, DF, MexicoUniv Nebraska, Dept Genom Med & Toxicol, Lincoln, NE, USAUniv Nebraska, Dept Nutrit Genet, Lincoln, NE, USA TI - Biotin availability regulates the expression of enzymes involved in it utilization and recycling in human cells MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000178025801432 SO - American Journal of Human Genetics 2002 ;71(4):416-416 6375 UI - 8156 AU - Pacheco-Tena C AU - Burgos-Vargas R AU - Aubin JE AU - Stone M AU - Perez-Tamayo R AU - Pineda C AU - Inman RD AD - Univ Toronto, Toronto, ON, CanadaHosp Gen Mexico City, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoInst Nacl Cardiol, Mexico City, DF, Mexico TI - Characterization of the osteoblast phenotype in spondyloarthropathy: Lessons from the ankylosing tarsitis environment MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421801173 SO - Arthritis and Rheumatism 2002 ;46(9):S436-S436 6376 UI - 10767 AU - Pacheco-Tena C AU - Zhang X AU - Stone M AU - Burgos-Vargas R AU - Inman RD AD - Toronto Western Hosp, Arthrit Ctr Excellence, Toronto, ON M5T 2S8, CanadaUniv Toronto, Dept Med & Immunol, Toronto, ON, CanadaHosp Gen Mexico City, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Dept Med, Mexico City 04510, DF, MexicoPacheco-Tena, C, Toronto Western Hosp, Arthrit Ctr Excellence, 399 Bathurst St, Toronto, ON M5T 2S8, Canada TI - Innate immunity in host-microbial interactions: Beyond B27 in the spondyloarthropathies AB - The spondyloarthropathies are diseases influenced by genetic predisposition and, to a varying extent, infectious triggers. A causal role for bacterial infections is most clear for reactive arthritis. Recent insights into arthritogenic components of bacteria may set the stage for a better understanding of disease pathogenesis, the role of heat shock proteins in antigen processing and immune activation, and the adjuvant effect of CpG-DNA. Recent developments in the area of innate immunity broaden current concepts of genetically defined factors in host-pathogen interactions. In particular, the biology of toll-like receptors as important elements in the innate immune response to pathogens is being defined. These factors in innate immunity may have important implications for sequelae of infections, such as reactive arthritis. (C) 2002 Lippincott Williams Wilkins, Inc MH - Canada MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Rheumatology U5 - J;Review AV - English IS - 1040-8711 UR - ISI:000176819200007 L2 - TOLL-LIKE RECEPTOR-2; HEAT-SHOCK-PROTEIN; POLYMERASE-CHAIN-REACTION; INFLAMMATORY-BOWEL-DISEASE; COLLAGEN-INDUCED ARTHRITIS; EUBACTERIUM CELL-WALL; HUMAN DENDRITIC CELLS; GENOME-WIDE SEARCH; BACTERIAL-DNA; CHLAMYDIA-TRACHOMATIS SO - Current Opinion in Rheumatology 2002 ;14(4):373-382 6377 UI - 11536 AU - Pacheco-Tena C AU - Londono JD AU - Cazarin-Barrientos J AU - Martinez A AU - Vazquez-Mellado J AU - Moctezumna JF AU - Gonzalez MA AU - Pineda C AU - Cardiel MH AU - Burgos-Vargas R AD - Hosp Gen Mexico City, Dept Rheumatol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Rheumatol, Mexico City, DF, MexicoPacheco-Tena, C, Toronto Western Hosp, Arthrit Ctr Excellence, 399 Bathurst St, Toronto, ON M5T 2S8, Canada TI - Development of a radiographic index to assess the tarsal involvement in patients with spondyloarthropathies AB - Objective: To develop and test an index to evaluate the radiographic changes that occur in the tarsus and adjacent areas of the foot in patients with spondyloarthropathies (SpA). Methods: The sponcyloarthropathy tarsal radiographic index (SpA-TRI) was developed in three consecutive steps: (a) detection of descriptors after reviewing 70 radiographic files; (b) descriptor gradation and subsequent modifications performed by a consensus committee, and (c) interobserver variability assessed by three blinded and independent observers on 272 radiographs: anteroposterior 118, lateral 90, oblique 64 from 12 1 patients with SpA, and intraobserver variability on 75 radiographs from 25 patients with SpA. Statistical analysis included percentage of agreement and K test. SpA-TRI score ranges from 0 to 4 (0=normal; 1 =osteopenia or suspicious findings; 2=definite joint space narrowing, bony erosion(s), periosteal whiskering, or enthesophyte(s) in the plantar fascia or Achilleal tendon attachments; 3=para-articular enthesophyte(s); 4=bony ankylosis (joint space fusion or complete bridging)). Results: Complete agreement for every evaluation was >40%, and discordance >1 grade was <15%. The K scores among the three observers were acceptable for all the single projections: oblique (0.52, 0.36, 0.35), lateral (0.50, 0.42, 0.56), and anteroposterior (0.40, 0.41, 0.21) views. The combination of lateral and oblique views achieved the highest concordance rates (0.72, 0.33, 0.66), surpassing that of the three projections altogether (0.34, 0.58, 0.37). In every case the concordance was comparable with that of sacroiliac joints (0.47, 0.41, 0.34); intraobserver concordance showed a similar trend. Conclusion: The SpA-TRI is an index that includes the most prominent features of tarsal disease and adjacent areas of the foot in SpA and grades them accordingly, it has an adequate reproducibility, and is suitable for use with two or more projections, preferably the combination of oblique and lateral MH - Canada MH - Mexico|Distrito Federal PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 6 U4 - Rheumatology U5 - J;Article AV - English IS - 0003-4967 UR - ISI:000174567800009 L2 - ANKYLOSING-SPONDYLITIS; ONSET; CLASSIFICATION; ARTHRITIS; CRITERIA; PROPOSAL; DISEASE SO - Annals of the Rheumatic Diseases 2002 ;61(4):330-334 6378 UI - 11975 AU - Padilla-Martinez II AU - Poveda ML AU - Carmona E AU - Monge MA AU - Ruiz-Valero C AD - Univ Sevilla, CSIC, Dept Quim Inorgan, Inst Invest Quim, Seville 41092, SpainCSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, SpainIPN, Unidad Profess Interdisciplinaria Biol, Mexico City 07340, DF, MexicoCarmona, E, Univ Sevilla, CSIC, Dept Quim Inorgan, Inst Invest Quim, Avda Amer Vespucio S-N,Isla Cartuja, Seville 41092, Spain TI - Synthesis and reactivity of [Ir(C2H4)(2)Tpm(Me2)]PF6 (Tpm(Me2) = tris(3,5-dimethylpyrazolyl)methane): Comparison with the analogous Tp(Me2) derivatives (Tp(Me2) = hydrotris(3,5-dimethylpyrazolyl)borate) AB - A series of cationic Ir complexes of the neutral Tpm(Me2) ligand (Tpm(Me2) = tris(3,5-dimethylpyrazolyl)methane) have been-investigated and compared, chemically and structurally, with the analogous derivatives of the monoanionic Tp(Me2) (Tp(Me2) = hydrotris(3,5-dimethylpyrazolyl)borate). The bis(ethene) compound [Ir(C2H4)(2)Tpm(Me2)]PF6 (1) undergoes olefinic C-H activation under very mild conditions to give first [Ir(H)(CH=CH2)(C2H4)Tpm(Me2)](+) (2) (all cationic species described have been isolated in the form of PF6- salts) and subsequently hydride-crotyl products derived from C-C coupling of the hydrocarbon ligands of 2. A different bond-forming reaction has been encountered during the solid-state thermal activation of I (suspended in C6H12), leading to the hydride-alpha,omega-butenyl derivative 4. X-ray studies on the latter compound show close structural analogies with related complexes of the Tp(Me2) ligand and, specifically, a striking similarity of the structural parameters of the IrTpm(Me2) and lrTp(Me2) moieties. Compound 4 reacts with hard donors, giving [Ir(CH2CH2CH2CH2)(L)TPmMe2](+) adducts (9; L = py, NCMe), whereas the soft donors PR3 (R = Me, Et) and CN- allow the isolation of complexes derived from the attack of the soft nucleophile at the internal coordinated olefinic carbon (complexes 10a-c). Hydrogenation of I under different experimental conditions permits the production of different hydride products, e.g. [Ir(H)(2)(C2H4)Tpm(Me2)](+) (13) and [Ir(H)(C2H5)(C2H4)Tpm(Me2)](+) (12). Carbene derivatives resulting from the regioselective double C-H bond activation of THF (compounds 11 and 16) have been produced using 4 and 13 as the reactants MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000173227400014 L2 - H BOND ACTIVATION; TRANSITION-METAL COMPLEXES; TRIS(PYRAZOLYL)METHANE LIGANDS; C-C; POLY(PYRAZOL-1-YL)METHANE LIGANDS; HYDRIDE COMPLEXES; ALKANE COMPLEXES; METHYL LIGANDS; INSERTION; CHEMISTRY SO - Organometallics 2002 ;21(1):93-104 6379 UI - 7655 AU - Padilla LE AU - Thilmany D AU - Davis SP AD - Univ Autonoma Zacatecas, Zacatecas, MexicoColorado State Univ, Ft Collins, CO 80523, USA TI - "Price relationships for Mexican fresh tomatoes in US and Mexican terminal markets." MH - Mexico|Zacatecas MH - USA PB - LOGAN: WESTERN AGRICULTURAL ECONOMICS ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Economics & Policy;Economics U5 - J;Meeting Abstract NT - DUPLICATE AV - English IS - 0162-1912 UR - ISI:000183192300069 SO - Journal of Agricultural and Resource Economics 2002 ;27(2):581-582 6380 UI - 10251 AU - Page D AU - Usov VV AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoWeizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, IsraelPage, D, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Thermal evolution and light curves of young bare strange stars AB - We study numerically the cooling of a young bare strange star and show that its thermal luminosity, mostly due to e(+)e(-) pair production from the quark surface, may be much higher than the Eddington limit. The mean energy of photons far from the strange star is similar to10(2) keV or even more. This differs both qualitatively and quantitatively from the thermal emission from neutron stars and provides a definite observational signature for bare strange stars. It is shown that the energy gap of superconducting quark matter may be estimated from the light curves if it is in the range from similar to0.5 MeV to a few MeV MH - Israel MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 40 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000178071800005 L2 - QUARK MATTER SURFACES; GAMMA-RAY BURSTS; NEUTRON-STARS; E(+)E(-) EMISSION; SUPERCONDUCTIVITY; SUPERFLUIDITY; BARYON; QCD SO - Physical Review Letters 2002 ;89(13): 6381 UI - 9971 AU - Paiva-Silva GO AU - Sorgine MHF AU - Benedetti CE AU - Meneghini R AU - Almeida IC AU - Machado EA AU - nsa-Petretski M AU - Yepiz-Plascencia G AU - Law JH AU - Oliveira PL AU - Masuda H AD - Univ Fed Rio de Janeiro, Inst Ciencias Biomed, Dept bioquim Med, BR-21941590 Rio De Janeiro, BrazilLab Nacl Luz Sincrotron, LNLS, BR-13084971 Campinas, SP, BrazilUniv Sao Paulo, Dept Parasitol, Inst Ciencias Biomed, BR-05508900 Sao Paulo, BrazilUniv Fed Rio de Janeiro, Lab Entomol Med, Inst Biofis Carlos Chagas Filho, BR-21941590 Rio De Janeiro, BrazilCIAD, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Biochem & Mol Biophys, Tucson, AZ 85721, USAPaiva-Silva, GO, Univ Fed Rio de Janeiro, Inst Ciencias Biomed, Dept bioquim Med, BR-21941590 Rio De Janeiro, Brazil TI - On the biosynthesis of Rhodnius prolixus heme-binding protein AB - The biosynthesis of Rhodnius prolixus heme-binding protein (RHBP), which is present in the hemolymph and oocytes of Rhodnius prolixtis, was investigated. Fat bodies of female insects incubated in vitro with C-14-leucine were able to synthesize and secrete C-14-RHBP to the culture medium. Titration of synthesized RHBP with hemin showed that the protein secreted by the fat bodies is bound to heme, despite the presence of apo-RHBP in the hemolymph. The sequence of the RHBP cDNA encodes a pre-protein of 128 amino acids with no significant homology to any known protein. Northern-blot assays revealed that RHBP expression was limited to fat bodies. The levels of both RHBP mRNA and secreted protein increased in response to blood meal. In addition, the time-course of RHBP secretion in vitro paralleled mRNA accumulation observed in vivo. The inhibition of the de novo heme biosynthesis by treatment of fat bodies with succinyl acetone (SA), an irreversible inhibitor of delta-aminolevulinic acid-dehydratase, led to a significant decrease of heme-RHBP secretion. Nevertheless, the levels of RHBP mRNA were not modified by SA treatment, suggesting that the herne availability is involved in a post-transcriptional control of the RHBP synthesis. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Brazil MH - Mexico|Sonora MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0965-1748 UR - ISI:000178849800020 L2 - heme;hematophagy;antioxidants;oogenesis;yolk proteins;Rhodnius prolixus;BLOODSUCKING INSECT; FAT-BODY; LIPID-PEROXIDATION; JUVENILE-HORMONE; MANDUCA-SEXTA; TRANSFERRIN; EXPRESSION; HEMOPEXIN; PROTECTION; OOGENESIS SO - Insect Biochemistry and Molecular Biology 2002 ;32(11):1533-1541 6382 UI - 11758 AU - Palacios-Fest MR AU - Carreno AL AU - Ortega-Ramirez JR AU - varado-Valdez G AD - Terra Nostra Earth Sci Res, Tucson, AZ 85741, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv San Luis Potosi, Dept Geol, San Luis Potosi 78290, MexicoPalacios-Fest, MR, Terra Nostra Earth Sci Res, 3220 W Ina Rd 8105, Tucson, AZ 85741 USA TI - A paleoenvironmental reconstruction of Laguna Babicora, Chihuahua, Mexico based on ostracode paleoecology and trace element shell chemistry AB - Paleoecology of Laguna Babicora, Chihuahua, Mexico was reconstructed using ostracode faunal assemblages and shell chemistry. The paleolimnological record is used to show the magnitude of paleoclimatic changes in the area from 25,000 years to the present. Faunal assemblages consist of four species of the genus Limnocythere: L. sappaensis, L. ceriotuberosa, L. bradburyi and L. platyforma, all associated with Candona caudata, Candona patzcuaro and Cypridopsis vidua. A paleosalinity index developed from these assemblages indicates that the lake's salinity fluctuated frequently from oligo- to meso-haline conditions during the last less than or similar to 25,000 years. This pattern and low salinity range are in good agreement with modern TDS (here used as an indicator of salinity) values recorded from 26 wells and one spring from the area (258-975 mg l(-1)). To estimate paleotemperature we examined the trace element content (Mg/Ca ratios) from individual valves of L. ceriotuberosa and L. platyforma, the two species most commonly recorded in Laguna Babicora. Shell Mg/Ca ratios of 204 specimens of these two species were used to estimate water temperature (Mg/Ca) by means of experimental standard coefficients. Our data show that paleowater temperature ranged from 5.6-21.3 degreesC (with 2sigma values ranging from 0.2-4.8 degreesC), which suggest a close correlation with atmospheric temperatures around the lake. These results are in good agreement with a modern mean winter temperature (3.5 degreesC) and mean summer temperature (20 degreesC) recorded in the area between 1970 and 1980 MH - USA MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Limnology U5 - J;Article AV - English IS - 0921-2728 UR - ISI:000173990500003 L2 - ostracodes;paleotemperature;lake evolution;Pleistocene-Holocene;SOUTHWESTERN UNITED-STATES; LATE PLEISTOCENE-HOLOCENE; PALEOCLIMATIC CHANGES; STABLE-ISOTOPE; NORTH-AMERICA; CLIMATE; DESERT; LAKE; PALEOTEMPERATURE; PALEOSALINITY SO - Journal of Paleolimnology 2002 ;27(2):185-206 6383 UI - 7772 AU - Palacios JM AU - Venegas S AU - Apella MC AU - Morando PJ AU - Blesa MA AD - UNT, FCN, CERELA, San Miguel De Tucuman, Tucuman, ArgentinaUAQ, CNEA, Queretaro, Mexico TI - Exogenous calcium influence on hydroxyapatite surface properties and on bacterial adsorption MH - Argentina MH - Mexico|Queretaro PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Meeting Abstract AV - English IS - 0022-0345 UR - ISI:000180217900162 SO - Journal of Dental Research 2002 ;81():B26-B26 6384 UI - 9363 AU - Palacios JM AU - del Sosa A AU - Uribe A AU - Davila B AU - Ibarra M AU - Torres M AU - Cantu S AU - Garza A AU - Aubanel P AD - Hosp Enfermedades Cardiovasc & Torax, IMSS, Monterrey, NL, MexicoHosp Prado, Tijuana, BC, Canada TI - Persistent ST elevation as a predictor of mortality after angiographically successful primary percutaneus coronary intervention MH - Canada MH - Mexico|Nuevo Leon PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0002-9149 UR - ISI:000178077400369 SO - American Journal of Cardiology 2002 ;90(6A):146H-146H 6385 UI - 10314 AU - Pali R AU - Loria-Basstarrachea M AU - guilar-Vega M AU - Angulo JL AU - Vazquez H AD - Ctr Invest Cient Yucatan AC, Merida 97200, Yucatan, VenezuelaCtr Invest Quim Aplicada, Saltillo, Coahuila, MexicoUniv Autonoma Metropolitana Unidad Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoAguilar-Vega, M, Ctr Invest Cient Yucatan AC, Calle 43 130,Col Chuburna de Hidalgo, Merida 97200, Yucatan, Venezuela TI - Synthesis and characterization of aromatic polyamides obtained from 4-4 '-(9-fluorenylidene)diamine, 4-4 '-(hexafluoro-isopropylidene)dianIline and 4-4 '-diamine-benzophenone AB - Nine aromatic polyamides were synthesized from three different diamines by high-temperature polycondensation using three different aromatic diacid chlorides. A comparison of the effect that structural modifications afforded by the substitutions at the diacid chloride pheryl position and the introduction of bulky side groups in the diamine contribution were evaluated. Polyamide properties were characterized by DSC, TGA, wide angle x-ray scattering, density, light scattering and solubility. Differential scanning calorimetry measurements indicated that all polymers have high glass transition temperatures ranging from 236 to 319 degreesC, while thermogravimetrical measurements show that the onset of decomposition of these polymers is above 460 degreesC and that they are thermally stable. It was also found that almost all polymers were soluble in polar aprotic solvents. The results indicate that introduction of bulky side groups in the structure of the aromatic polyamides increases the T-g, while packing efficiency is lowered by these aromatic groups. Furthermore, the hexafluoro substitution in the polyamides raises their thermal stability, which may be attributed to the strong C-F bond. A relationship between T-g and the conformational entropy determined by structure was found, indicating that the higher the rigidity of the polyamide the higher the T-g. Moreover, the incorporation of bulky side groups on the structure increases the T-g more than an increase on rigidity, which indicates that the effect of intermolecular interactions is more important for an increase in T-g than the effect of chain stiffness MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Venezuela PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0954-0083 UR - ISI:000177971800007 L2 - aromatic polyamides;polycondensation;thermal properties;wide angle x-ray diffraction;light scattering;chain stiffness;GAS-TRANSPORT PROPERTIES; DIRECT POLYCONDENSATION; PHYSICAL-PROPERTIES; DICARBOXYLIC-ACIDS; 2,2-BIS<4-(4-AMINOPHENOXY)PHENYL>HEXAFLUOROPROPANE; CONNECTOR; POLYMERS SO - High Performance Polymers 2002 ;14(1):77-91 6386 UI - 10975 AU - Palma A AU - Leon V AU - Lefebvre R AD - INAOE, Puebla 72000, MexicoBUAP, Inst Fis, Puebla 72570, MexicoUniv Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, FranceUniv Paris 06, UFR Phys Fondamentale & Appliquee, F-75231 Paris, FrancePalma, A, INAOE, Apdo Postal 51&216, Puebla 72000, Mexico TI - Harmonic oscillator Floquet states in the Bargmann-Segal space AB - The Floquet quasi-energies and eigenfunctions for the harmonic oscillator interacting with a monochromatic electric field are obtained by using the so-called Bargmann-Segal space. The Schrodinger second-order differential equation in configuration space is transformed into a linear first-order equation in such a space, which is easily solved by means of an auxiliary system (called the Lagrange system) of ordinary differential equations. This method compares favourably with others previously used MH - France MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176075300019 SO - Journal of Physics A-Mathematical and General 2002 ;35(2):419-424 6387 UI - 10213 AU - Palmer KA AU - Oldroyd BP AU - Quezada-Euan JJG AU - Paxton RJ AU - May-Itza WD AD - Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, AustraliaUniv Autonoma Yucatan, Fac Med Vet, Merida 97100, Yucatan, MexicoUniv Tubingen, Inst Zool, D-72076 Tubingen, GermanyPalmer, KA, Univ Copenhagen, Inst Zool, Univ Pk 15, DK-2100 Copenhagen, Denmark TI - Paternity frequency and maternity of males in some stingless bee species AB - In monogynous hymenopteran societies, the number of mates of a queen strongly influences the potential for conflict between workers and queens over the maternity of males. Queens always 'prefer' their own sons to sons of workers, regardless of queen mating frequency. When a queen mates once, workers are more closely related to, and therefore are expected to prefer, their own sons and then sons of sisters to sons of the queen. However, if effective paternity frequency exceeds 2, workers on average should prefer queen-produced males to males produced by their sisters. We studied the queen mating frequency of seven stingless bee species: the Mexican species Scaptotrigona mexicana , S. pectoralis and the Australian species Austroplebeia symei , Trigona clypearis , T. hockingsi , T. mellipes and T. sapiens . We then determined whether males arise from eggs laid by workers or queens in A. symei , T. clypearis , T. hockingsi and T. mellipes . We show that all seven species investigated are most likely singly mated and that the queen dominates reproduction. This indicates that the queen's mating frequency alone does not determine whether workers or the queen produces the males MH - Australia MH - Denmark MH - Germany MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000178134500020 L2 - Austroplebeia;paternity frequency;reproductive conflict;Scaptotrigona;stingless bees;Trigona;AUSTRALIS FRIESE HYMENOPTERA; EUSOCIAL HYMENOPTERA; WORKER REPRODUCTION; SOCIAL INSECTS; VESPINE WASPS; KIN SELECTION; APIDAE; RELATEDNESS; MELIPONINAE; HONEYBEE SO - Molecular Ecology 2002 ;11(10):2107-2113 6388 UI - 10380 AU - Pan HY AU - Yu DP AU - Lian GJ AU - Xiong GC AU - Zhang XP AU - Sun XC AD - Peking Univ, Dept Phys, Electron Microscopy Lab, Beijing 100871, Peoples R ChinaPeking Univ, Mesoscop Phys Natl Lab, Beijing 100871, Peoples R ChinaInst Mexicano Petr, Mexico City 07730, DF, MexicoYu, DP, Peking Univ, Dept Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China TI - Microstructure of epitaxial superconductive YBa2Cu3O7 thin films prepared at different deposition rates AB - A study is reported on the growth mechanism of YBa2Cu3O7 with different growth speeds by high resolution transmission microscopy (HRTEM) and analysis of the interface and thin film microstructure. Two thin films were synthesized by pulse laser deposition on [100], miscut 5degrees, SrTiO3 substrate at 820 degreesC, one with a pulse laser frequency of 1 Hz and one with 6 Hz. Cross-sections were studied by an H-9000 NAR HRTEM along the [010] direction. The growth process of the sample made at 1 Hz was as follows. First, distorted step flow growth occurred on a step-mediated substrate surface of 3-4 cells thickness. Second, about a 15 nm thickness of island shape growth becomes superimposed on the area of the step flow layer. Finally, thin film growth occurred but with growth fluctuation. The sample made at 6 Hz showed the characteristics of island growth; the growth area of island or ball shape was of small size and dense distribution, and seemed to be a confused mosaic stack. The influence of growth speed on YBCO epitaxial film microstructure was studied explicitly by HRTEM MH - Mexico|Distrito Federal MH - Peoples R China PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177615700001 L2 - TRANSPORT-PROPERTIES; GROWTH SO - Molecular Physics 2002 ;100(19):3049-3054 6389 UI - 11688 AU - Pan TL AU - Nielsen LD AU - Allen MJ AU - Shannon KM AU - Shannon JM AU - Selman M AU - Mason RJ AD - Natl Jewish Med & Res Ctr, Dept Med, Denver, CO 80206, USAUniv Colorado, Hlth Sci Ctr, Dept Med, Denver, CO 80206, USAUniv Cincinnati, Cincinnati, OH 45229, USANatl Inst Resp Dis, Mexico City 14080, DF, MexicoMason, RJ, Natl Jewish Med & Res Ctr, Dept Med, 1400 Jackson St,K625, Denver, CO 80206 USA TI - Serum SP-D is a marker of lung injury in rats AB - Pulmonary surfactant protein D (SP-D) is expressed in alveolar type II and bronchiolar epithelial cells and is secreted into alveoli and conducting airways. However, SP-D has also been measured in serum and is increased in patients with acute respiratory distress syndrome, pulmonary fibrosis, and alveolar proteinosis. To demonstrate that SP-D can be measured in rat serum, we instilled rats with keratinocyte growth factor, which produces type II cell hyperplasia and an increase in SP-D in bronchoalveolar lavage fluid (BALF). To evaluate serum SP-D as a biomarker of lung injury, we examined several injury models. In rats treated with 1 unit of bleomycin, serum SP-D was elevated on days 3, 7, 14, and 28 after instillation, and SP-D mRNA was increased in focal areas as detected by in situ hybridization. However, there was no increase in whole lung SP-D mRNA when the expression was normalized to whole lung 18S rRNA. After instillation of 2 units of bleomycin, the serum levels of SP-D were higher, and SP-D was also increased in BALF and lung homogenates. In another model of subacute injury, serum SP-D was increased in rats treated with paraquat plus oxygen. Finally to evaluate acute lung injury, we instilled rats with HCl; SP-D was increased at 4 h after instillation. Our data indicate that serum SP-D may be a useful indicator of lung injury and type II cell hyperplasia in rats MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physiology;Respiratory System U5 - J;Article AV - English IS - 1040-0605 UR - ISI:000174231500027 L2 - bleomycin injury;paraquat injury;HCl injury;keratinocyte growth factor;alveolar type II cells;surfactant protein D;SURFACTANT PROTEIN-A; KERATINOCYTE GROWTH-FACTOR; RESPIRATORY-DISTRESS-SYNDROME; INDUCED PULMONARY FIBROSIS; PHOSPHOLIPID COMPONENTS; II CELLS; BLEOMYCIN; PROLIFERATION; DISEASE; MORPHOLOGY SO - American Journal of Physiology-Lung Cellular and Molecular Physiology 2002 ;282(4):L824-L832 6390 UI - 11369 AU - Panayotaros P AD - Univ Nacl Autonoma Mexico, IIMAS, FENOMEC, Depto Matemat & Mecanica, Mexico City 01000, DF, MexicoPanayotaros, P, Univ Colorado, Dept Math Appl, Campus Box 526, Boulder, CO 80309 USA TI - An expansion method for non-linear Rayleigh waves AB - We use ideas from analytic bifurcation theory to develop expansions for periodic small amplitude traveling surface elastic waves of permanent form in the half-plane (Rayleigh waves). We focus on the case of hyperelastic materials where the traveling wave problem has a variational structure, and solve numerically the equations describing the lowest order approximation to the traveling wave solutions. For the materials considered, there is evidence for solutions describing elastic displacements that have discontinuous derivative at the boundary of the domain. (C) 2002 Published by Elsevier Science B.V MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Acoustics;Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 0165-2125 UR - ISI:000175064400001 SO - Wave Motion 2002 ;36(1):1-21 6391 UI - 10465 AU - Panella N AU - Dolan M AU - Xiong XP AU - Peralta-Cruz J AU - Khasawneh M AU - Karchesy J AD - Ctr Dis Control & Prevent, Ft Collins, CO 80522, USAOregon State Univ, Corvallis, OR 97331, USAIPN, Escuela Nacl Ciencias Biol, Dept Quim, Mexico City, DF, Mexico TI - Natural biocides from forest resources to control arthropod pests MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000177422200246 SO - Abstracts of Papers of the American Chemical Society 2002 ;224():U79-U79 6392 UI - 11891 AU - Paneque A AU - Reguera E AU - Fernandez-Bertran J AU - Yee-Madeira H AD - Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoCtr Pharmaceut Chem, Havana, CubaUniv Havana, Inst Mat & Reagents, Havana 10400, CubaIPN, Sch Math & Phys, Mexico City 07738, DF, MexicoReguera, E, Ctr Appl Sci & Adv Technol, Legaria 694,Colonia Irrigac, Mexico City 11500, DF, Mexico TI - Mechanochemical reactions of fluorides with hemin AB - Hemin has two potential sites to react with fluorides, the peripheral acid groups and the central Fe-lll cation. The mechanochemical reactions of hemin with fluorides (LiF, NaF, KF, CsF, NH4F and AgF) were monitored using X-ray diffraction (XRD), and IR and Mossbauer spectroscopies. LiF and NaF were found inert when milled with hemin, however KF, CsF, NH4F and AgF react at both hemin sites. At the iron site Cl- is replaced by F- with formation of KCl, CsCl, NH4Cl and AgCl, as detected by XRD, while with the peripheral acid groups, fluorides collect the acidic protons to form KHF2, CsHF2, NH4HF and AgHF2. The reactions of hemin with the reactive fluorides take place first at the iron site and then at the propionic, acid groups. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-1139 UR - ISI:000173500000001 L2 - mechanochemical reactions;hemin with fluorides;hemoglobin;IMIDAZOLE; ARGINATE SO - Journal of Fluorine Chemistry 2002 ;113(1):1-5 6393 UI - 11263 AU - Paniagua R AU - Amato D AU - Vonesh E AU - Correa-Rotter R AU - Ramos A AU - Moran J AU - Mujais S AD - Mexican Inst Social Secur, Mexico City, DF, MexicoBaxter Healthcare Corp, Deerfield, IL 60015, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoVasca Inc, Tewksbury, MA, USAPaniagua, R, IMSS, 4 Piso,Bloque B,Unidad Congresos,Ctr Med Nacl S X, Mexico City 06725, DF, Mexico TI - Effects of increased peritoneal clearances on mortality rates in peritoneal dialysis: ADEMEX, a prospective, randomized, controlled trial AB - Small-solute clearance targets for peritoneal dialysis (PD) have been based on the tacit assumption that peritoneal and renal clearances are equivalent and therefore additive. Although several studies have established that patient survival is directly correlated with renal clearances, there have been no randomized, controlled, interventional trials examining the effects of increases in peritoneal small-solute clearances on patient survival. A prospective. randomized. controlled. clinical trial was performed to study the effects of increased peritonea] small-solute clearances on clinical outcomes among patients with end-stage renal disease who were being treated with PD. A total of 965 subjects were randomly assigned to the intervention or control group (in a 1: 1 ratio). Subjects in the control group continued to receive their preexisting PD prescriptions, which consisted of four daily exchanges with 2 L of standard PD solution. The subjects in the intervention group were treated with a modified prescription. to achieve a peritoneal creatinine clearance (pCrCl]) of 60 L/wk per 1.73 m(2). The primary endpoint was death, The minimal follow-up period was 2 yr. The study groups were similar with respect to demographic characteristics, causes of renal disease, prevalence of coexisting conditions, residual renal function, peritoneal clearances before intervention, hematocrit values, and multiple indicators of nutritional status. In the control group, peritoneal creatinine clearance (pCrCl) and peritoneal urea clearance (Kt/V) values remained constant for the duration of the study. In the intervention group, pCrCl and peritoneal Kt[V values predictably increased and remained separated from the values for the control group for the entire duration of the study (P < 0.01). Patient survival was similar for the control and intervention groups in an intent-to-treat analysis, with a relative risk of death (intervention/control) of 1.00 [95% confidence interval (CI), 0.80 to 1.24]. Overall, the control group exhibited a 1-yr survival of 85.5% (Cl, 82.2 to 88.7%) and a 2-yr survival of 68.3% (Cl, 64.2 to 72.9%). Similarly, the intervention group exhibited a 1-yr survival of 83.9% (CI, 80.6 to 87.2%) and a 2-yr survival of 69.3% (Cl, 65.1 to 73.6%). An as-treated analysis revealed similar results (overall relative risk = 0.93; CI, 0.71 to 1.22; P = 0.6121). Mortality rates for the two groups remained similar even after adjustment for factors known to be associated with survival for patients undergoing PD (e.g., age, diabetes mellitus, serum albumin levels, normalized protein equivalent of total nitrogen appearance, and anuria). This study provides evidence that increases in peritoneal small-solute clearances within the range studied have a neutral effect on patient survival, even when the groups are stratified according to a variety of factors (age, diabetes mellitus, serum albumin levels, normalized protein equivalent of total nitrogen appearance, and anuria) known to affect survival. No clear survival advantage was obtained with increases in peritoneal small-solute clearances within the range achieved in this study MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 278 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000175210800021 L2 - RESIDUAL RENAL-FUNCTION; CAPD PATIENTS; HEMODIALYSIS-PATIENTS; NUTRITIONAL-STATUS; CLINICAL OUTCOMES; SOLUTE TRANSPORT; ADEQUACY; MORBIDITY; SURVIVAL; UREA SO - Journal of the American Society of Nephrology 2002 ;13(5): 6394 UI - 9860 AU - Panoiu NC AU - Mel'nikov IV AU - Mihalache D AU - Etrich C AU - Lederer F AD - Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027, USAInst Atom Phys, Dept Theoret Phys, Bucharest, RomaniaMorelos State Autonomous Univ, Ctr Res Engn & Appl Sci, Cuernavaca 62210, Morelos, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaUniv Jena, Inst Solid State Theory & Theoret Opt, D-07743 Jena, GermanyPanoiu, NC, Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA TI - Soliton generation from a multi-frequency optical signal AB - We present a comprehensive analysis of the generation of optical solitons in a monomode optical fibre from a superposition of soliton-like optical pulses at different frequencies. It is demonstrated that the structure of the emerging optical field is highly dependent on the number of input channels, the inter-channel frequency separation, the time shift between the pulses belonging to adjacent channels, and the polarization of the pulses. Also, it is found that there exists a critical frequency separation above which wavelength-division multiplexing with solitons is feasible and that this critical frequency increases with the number of transmission channels. Moreover, for the case in which only two channels are considered, we analyse the propagation of the emerging two-soliton solutions in the presence of several perturbations important for optical networks: bandwidth-limited amplification, nonlinear amplification, and amplitude and phase modulation. Finally, the influence of the birefringence of the fibre on the structure of the emerging optical field is discussed MH - USA MH - Germany MH - Mexico|Morelos MH - Romania MH - Russia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Optics;Physics, Applied U5 - J;Review AV - English IS - 1464-4266 UR - ISI:000179182700001 L2 - optical solitons;optical fibres;soliton interaction;adiabatic perturbation theory;WDM;birefringence;BANDWIDTH-LIMITED AMPLIFICATION; NONLINEAR SCHRODINGER-EQUATION; DIVISION MULTIPLEXING TRANSMISSION; DISPERSIVE DIELECTRIC FIBERS; INVERSE-SCATTERING TRANSFORM; PULSE-PROPAGATION; COMMUNICATION-SYSTEMS; PERTURBATION-THEORY; INTERACTION FORCES; LUMPED AMPLIFIERS SO - Journal of Optics B-Quantum and Semiclassical Optics 2002 ;4(5):R53-R68 6395 UI - 11630 AU - Pantoja O AU - Smith JAC AD - Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, EnglandPantoja, O, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Sensitivity of the plant vacuolar malate channel to pH, Ca2+ and anion-channel blockers AB - The organic anion malate is accumulated in the central vacuole of most plant cells. Malate has several important roles in plant vacuoles, such as the maintenance of charge balance and pH regulation, as an osmolyte involved in the generation of cell turgor, and as a storage form of CO2. Transport of malate across the vacuolar membrane is important for the regulation of cytoplasmic pH and the control of cellular metabolism, particularly in plants showing crassulacean acid metabolism (CAM), in which large fluxes of malate occur during the day/night cycle. By applying the patch-clamp technique, in the whole-vacuole configuration, to isolated vacuoles from leaf mesophyll cells of the CAM plant Kalanchoe daigremontiana, we studied the regulation of the vacuolar malate channel by pH and Ca2+, as well as its sensitivity to anion-channel blockers. Malate currents were found to be insensitive to Ca2+ on the cytoplasmic side of the membrane over a range from approximately 10(-8) m to 10(-4) M. In contrast, decreasing cytoplasmic pH below 7.5 had a significant modulatory effect on channel activity, reducing malate currents by 40%, whereas increasing cytoplasmic pH above 7.5 resulted in no change in current. Several known Cl--channel blockers inhibited the vacuolar malate currents: niflumic acid and indanoyloxyacetic acid (IAA-94) proved to be the most effective inhibitors, exerting half-maximal effects at concentrations of approximately 20 muM, suggesting that the plant vacuolar malate channel may share certain similarities with other classes of known anion channels MH - United Kingdom MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology;Cell Biology;Physiology U5 - J;Article AV - English IS - 0022-2631 UR - ISI:000174304900004 L2 - malate channel;tonoplast;CAM-kalanchoe;niflumic acid;CRASSULACEAN ACID METABOLISM; CA-2+-ACTIVATED K+ CHANNELS; CATHARANTHUS-ROSEUS CELLS; STOMATAL GUARD-CELLS; ION CHANNELS; PLASMA-MEMBRANE; CHLORIDE CHANNELS; CITRATE TRANSPORT; INWARD-RECTIFIER; SKELETAL-MUSCLE SO - Journal of Membrane Biology 2002 ;186(1):31-42 6396 UI - 9374 AU - Papachristou PK AU - Diakonos FK AU - Constantoudis V AU - Schmelcher P AU - Benet L AD - Univ Heidelberg, Inst Chem Phys, D-69120 Heidelberg, GermanyUniv Athens, Dept Phys, GR-15771 Athens, GreeceNatl Tech Univ Athens, Dept Phys, Athens 15780, GreeceMax Planck Inst Kernphys, D-69029 Heidelberg, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoSchmelcher, P, Univ Heidelberg, Inst Chem Phys, INF 229, D-69120 Heidelberg, Germany TI - Classical scattering from oscillating targets AB - We study planar classical scattering from an oscillating heavy target whose dynamics defines a five-dimensional phase space. Although the system possesses no periodic orbits, and thus topological chaos is not present, the scattering functions display a variety of structures on different time scales. These structures are due to scattering events with a strong energy transfer from the projectile to the moving disk resulting in low-velocity peaks. We encounter initial conditions for which the projectile exhibits infinitely many bounces with the oscillating disk. Our numerical investigations are supported by analytical results on a specific model with a simple time-law. The observed properties possess universal character for scattering off oscillating targets. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Greece MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000180382100010 L2 - CHAOTIC SCATTERING; POTENTIAL SCATTERING; HAMILTONIAN-SYSTEMS; DRIVEN HELIUM; SINGULARITIES SO - Physics Letters A 2002 ;306(2-3):116-126 6397 UI - 11165 AU - Pardo-Lopez L AU - Zhang M AU - Liu J AU - Jiang M AU - Possani LD AU - Tseng GN AD - Virginia Commonwealth Univ, Dept Physiol, Richmond, VA 23298, USANatl Autonomous Univ Mexico, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoTseng, GN, Virginia Commonwealth Univ, Dept Physiol, 1101 E Marshall St, Richmond, VA 23298 USA TI - Mapping the binding site of a human ether-a-go-go-related gene-specific peptide toxin (ErgTx) to the channel's outer vestibule AB - The goals of this study are to investigate the mechanism and site of action whereby a human ether-a-go-go-related gene (HERG)-specific scorpion peptide toxin, ErgTx, suppresses HERG current. We apply cysteine-scanning mutagenesis to the S5-P and P-S6 linkers of HERG and examine the resulting changes in ErgTx potency. Data are compared with the characteristics of charybdotoxin (ChTx, or its analogs) binding to the Shaker channel. ErgTx binds to the outer vestibule of HERG but may not physically occlude the pore. In contrast to ChTx-Shaker interaction, elevating [K](o) (from 2 to 98 mm) does not affect ErgTx potency, and through-solution electrostatic forces only play a minor role in influencing ErgTx.HERG interaction. Cysteine mutations of three positions in S5-P linker (Trp-585, Gly-590, and Ile-593) and 1 position in P-S6 linker (Pro-632) induce profound changes in ErgTx binding (DeltaDeltaG > 2 kcal/ mol). We propose that the long S5-P linker of the HERG channel forms an amphipathic a-helix that, together with the P-S6 linker, forms a hydrophobic ErgTx binding site. This study paves the way for future mutant cycle analysis of interacting residues in the ErgTx.HERG complex, which, in conjunction with NMR determination of the ErgTx solution structure, will yield information about the topology of HERG's outer vestibule MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 46 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000175564500010 L2 - SHAKER K+ CHANNEL; POTASSIUM CHANNEL; HERG-CHANNEL; I-KR; CHARYBDOTOXIN BLOCK; SCORPION VENOMS; PORE; INACTIVATION; MECHANISM; INHIBITOR SO - Journal of Biological Chemistry 2002 ;277(19):16403-16411 6398 UI - 12043 AU - Pardo-Lopez L AU - Garcia-Valdes J AU - Gurrola GB AU - Robertson GA AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Sturct Biol, Cuernavaca 62210, Morelos, MexicoUniv Wisconsin, Sch Med, Dept Physiol, Madison, WI 53706, USAPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Recognit & Sturct Biol, Avenida Univ 2001,POB 510-3, Cuernavaca 62210, Morelos, Mexico TI - Mapping the receptor site for ergtoxin, a specific blocker of ERG channels AB - We show here that ergtoxin (ErgTx) is a bona ride, specific blocker of the human ether-a-go-go-related gene (HERG) channels. It does not affect the function of either M-eag or M-elk channels. A chimeric construction containing a segment of the P-region of M-eag channel inserted into the HERG channel drastically diminished or completely abolished the inhibitory effect of ErgTx, whereas chimeras of the P-region of HERG channel into M-eag channels recovered the inhibitory effect. From the P-region point mutants of HERG channel assays, only the mutant N598Q shows about 25% decrement of the ErgTx inhibitory effect. ErgTx recognizes the P-region of HERG channels, blocking the channel function with a K-d in the order of 12 nM. (C) 2002 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000173129700011 L2 - human ether-a-go-go-related gene channel;K+;channel;ergtoxin;M-elk channel;M-eag channel;scorpion toxin;DEPENDENT K+ CHANNELS; LONG QT SYNDROME; POTASSIUM CHANNEL; CHARYBDOTOXIN BLOCK; CARDIAC-ARRHYTHMIA; MOLECULAR-BASIS; HERG; INHIBITOR; FAMILY; MECHANISM SO - Febs Letters 2002 ;510(1-2):45-49 6399 UI - 10192 AU - Parise B AU - Ceccarelli C AU - Tielens AGGM AU - Herbst E AU - Lefloch B AU - Caux E AU - Castets A AU - Mukhopadhyay I AU - Pagani L AU - Loinard L AD - UPS, CNRS, CESR, F-31028 Toulouse 04, FranceObserv Bordeaux, F-33270 Floirac, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble 09, FranceUniv Groningen, SRON, NL-9700 AV Groningen, NetherlandsOhio State Univ, Dept Phys, Columbus, OH 43210, USADakota State Univ, Coll Nat Sci, Madison, SD 57042, USAObserv Paris, LERMA, F-75014 Paris, FranceObserv Paris, CNRS, FRE 2460, F-75014 Paris, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoParise, B, UPS, CNRS, CESR, BP 4346, F-31028 Toulouse 04, France TI - Detection of doubly-deuterated methanol in the solar-type protostar IRAS 16293-2422 AB - We report the first detection of doubly-deuterated methanol (CHD2OH), as well as firm detections of the two singly-deuterated isotopomers of methanol (CH2DOH and CH3OD), towards the solar-type protostar IRAS 16293-2422. From the present multifrequency observations, we derive the following abundance ratios: [CHD2OH] / [CH3OH] = 0 2 +/- 0 1, [CH2DOH] / [CH3OH] = 0.9 +/- 0.3, [CH3OD] / [CH3OH] = 0.04 +/- 0.02. The total abundance of the deuterated forms of methanol is greater than that of its normal hydrogenated counterpart in the circumstellar material of IRAS 16293-2422, a circumstance not previously encountered. Formaldehyde, which is thought to be the chemical precursor of methanol, possesses a much lower fraction of deuterated isotopomers (similar to20%) with respect to the main isotopic form in IRAS 16293-2422. The observed fractionation of methanol and formaldehyde provides a severe challenge to both gas-phase and grain-surface models of deuteration. Two examples of the latter model are roughly in agreement with our observations of CHD2OH and CH2DOH if the accreting gas has a large (0.2-0.3) atomic D/H ratio. However, no gas-phase model predicts such a high atomic D H ratio, and hence some key ingredient seems to be missing MH - France MH - Mexico|Michoacan MH - Netherlands MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 56 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178313000002 L2 - ISM : abundances;ISM : molecules;stars : formation;ISM : individual : IRAS 16293-2422;GRAIN SURFACE-CHEMISTRY; GAS; IRAS-16293-2422; ORION; D2CO; FORMALDEHYDE; DEUTERIUM SO - Astronomy & Astrophysics 2002 ;393(3):L49-L53 6400 UI - 11547 AU - Park HK AU - Burnstein RA AU - Chakravorty A AU - Chan A AU - Chen YC AU - Choong WS AU - Clark K AU - Dukes EC AU - Durandet C AU - Felix J AU - Gidal G AU - Gu P AU - Gustafson HR AU - Ho C AU - Holmstrom T AU - Huang M AU - James C AU - Jenkins CM AU - Kaplan DM AU - Lederman LM AU - Leros N AU - Longo MJ AU - Lopez F AU - Lu L AU - Luebke W AU - Luk KB AU - Nelson KS AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Teng PK AU - Volk J AU - White C AU - White S AU - Zyla P AD - Univ Michigan, Ann Arbor, MI 48109, USAAcad Sinica, Inst Phys, Taipei 11529, TaiwanUniv Calif Berkeley, Berkeley, CA 94720, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Leon 37000, MexicoIIT, Chicago, IL 60616, USAUniv Lausanne, CH-1015 Lausanne, SwitzerlandUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv S Alabama, Mobile, AL 36688, USAUniv Virginia, Charlottesville, VA 22904, USAPark, HK, Univ Michigan, Ann Arbor, MI 48109, USA TI - Observation of the decay K-->pi(-)mu(+)mu(-) and measurements of the branching ratios for K-+/-->pi(+/-)mu(+)mu(-) AB - Using data collected with the HyperCP ( E871) spectrometer during the 1997 fixed-target run at Fermi-lab, we report the first observation of the decay K 2 ! p 2 m 1 m 2 and new measurements of the branching ratios for K+/- --> pi(+/-) mu(+/-) mu(+) mu(-). By combining the branching ratios for the decays K+ --> pi(+) mu(+) mu(-) and K- --> pi(-) mu(+) mu-, we measure Gamma(K+/- --> pi(+/-) mu(+) mu(-))/Gamma(K+/- --> all) = (9.8 +/- 1.0 +/- 0.5) x 10(-8). The CP asymmetry between the rates of the two decay modes is [Gamma(K+ --> pi(+) mu(+) mu(-)) - Gamma(K- --> pi(-) mu(+) mu(-))]/[Gamma(K+ --> pi(+) mu(+) mu(-)) + Gamma(K- --> pi(-) mu(+) mu(-))] = -0,02 +/- 0.11 +/- 0.04 MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000174541700006 SO - Physical Review Letters 2002 ;88(11): 6401 UI - 11038 AU - Parker GD AU - Fox PN AU - Langridge P AU - Chalmers K AU - Whan B AU - Ganter PF AD - Univ Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, EnglandCIMMYT, Mexico City 06600, DF, MexicoUniv Adelaide, Dept Plant Sci, CRC Mol Plant Breeding, Glen Osmond, SA 5064, AustraliaTennessee State Univ, Dept Biol, Nashville, TN 37209, USAParker, GD, Univ Manchester, Sch Biol Sci, 3-614 Stopford Bldg,Oxford Rd, Manchester M13 9PT, Lancs, England TI - Genetic diversity within Australian wheat breeding programs based on molecular and pedigree data AB - 124 wheat cultivars and breeding lines were screened with 19 microsatellite (SSR) loci generating 160 scorable bands which were used to construct a genetic distance (GD) matrix. A distance matrix based on coefficient of parentage (COP) scores was also generated for the cultivars for which good pedigree records were available. The SSR and COP data for 101 of the wheat cultivars were compared with genetic distance scores obtained using 1898 scorable restriction fragment length polymorphism (RFLP) bands previously generated. Phylograms were generated based on the SSR, RFLP, combined SSR and RFLP and COP data. The standardised Mantel's Z test showed that the distance matrices generated from all of the data sets were significantly correlated. Bootstrap analysis showed that, although the SSR and RFLP data were correlated, a large number of SSR loci are required for determining robust genetic relationships between large numbers of cultivars. In addition, accurate pedigree records are needed to determine genetic relatedness using COP. The molecular data were also used to determine the level of genetic variability within breeding programs and to assess the impact of the introduction of semidwarf and other germplasm. The results showed that the level of genetic diversity in Australian wheat cultivars has increased over time and that in particular, the introduction of semidwarf germplasm resulted in an increase in the overall diversity MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 14 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000175947700004 L2 - COP;GD;RFLP;SSR;wheat;EUROPEAN BARLEY GERMPLASM; MICROSATELLITE VARIABILITY; DROSOPHILA-MELANOGASTER; RFLP DATA; MARKERS; RAPD; CULTIVARS; SEQUENCES; WINTER; AFLP SO - Euphytica 2002 ;124(3):293-306 6402 UI - 10147 AU - Parmananda P AU - Sahle S AU - Baier G AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCtr Arts & Media Technol, D-76135 Karlsruhe, GermanyBaier, G, Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, Mexico TI - Detection of short term correlated events hidden within noise AB - A method for detecting transient correlated activity shrouded by high levels of noise is presented. An artificially constructed data set that is a composite of white noise and short periodic modulations is used as a probing perturbation for a spatially extended system exhibiting excitable spatiotemporal chaos. The periodic events are detected "on-line" by means of transiently induced coherence MH - Germany MH - Mexico|Morelos PB - MUNICH: R OLDENBOURG VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0942-9352 UR - ISI:000178286900007 L2 - excitable chaos;transient synchronization;time series analysis;EPILEPTIC SEIZURES; DYNAMICS; OSCILLATIONS; CYCLE; CHAOS SO - Zeitschrift fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics 2002 ;216(4):499-507 6403 UI - 11548 AU - Parmananda P AU - Green BJ AU - Hudson JL AD - UAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoUniv Virginia, Dept Chem Engn, Charlottesville, VA 22903, USAParmananda, P, UAEM, Fac Ciencias, Ave Univ 1001,Col Chamilpa, Cuernavaca, Morelos, Mexico TI - Suppressing spatiotemporal disorder via local perturbations in an electrochemical cell AB - We report experimental results depicting suppression of complex spatiotemporal dynamics under the influence of local periodic stimulations. In an experimental electrochemical system, applying a continuous forcing signal to one of the sites in an array of eight coupled oscillators, the naturally complex behavior of the remaining seven electrodes can be converted to periodic responses. The oscillations remain periodic as long as the forcing is active and revert back to exhibiting chaotic dynamics after the control is switched off. These results can also be interpreted as experimental realization of "phase-synchronization'' induced via local driving in an extended system. A possible relevance to the experimentally observed calcium wave patterns is pointed out MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000174548900010 L2 - CONTROLLING TURBULENCE; SYSTEMS; PATTERNS SO - Physical Review e 2002 ;65(3): 6404 UI - 10170 AU - Parra-Olea G AU - Garcia-Paris M AU - Wake DB AD - Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USAHarvard Univ, Museum Comparat Zool, Cambridge, MA 02138, USANatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoCSIC, Museo Nacl Ciencias Nat, E-28006 Madrid, SpainWake, DB, Univ Calif Berkeley, Museum Vertebrate Zool, 3101 Valley Life Sci Bldg, Berkeley, CA 94720 USA TI - Phylogenetic relationships among the salamanders of the Bolitoglossa macrinii species group (Amphibia : Plethodontidae), with descriptions of two new species from Oaxaca (Mexico) AB - The Bolitoglossa macrinii species group (restricted geographically to southern Oaxaca and southwestern Guerrero, Mexico) is a monophyletic assemblage of five species, B. macrinii, Bolitoglossa riletti, Bolitoglossa hermosa, Bolitoglossa oaxacensis sp. nov, and Bolitoglossa zapoteca sp, nov. DNA sequences totaling 1164 base pairs for the mitochondrial genes 16S ribosomal RNA and cytochrome b were analyzed to generate a phylogenetic hypothesis for the relationships within the group. Our hypothesis is in agreement with previous morphological and allozyme analyses. Divergence within the group is great (to 18.6% for cytochrome b, to 7.0% for 16S -rRNA) and two clades are well supported: one including B. riletti, B. hermosa, and B. zapoteca and the other including B. macrinii and B. oaxacensis. These clades likely diverged beginning in mid-Miocene times. We describe two new species, B. oaxacensis, for inland Oaxacan populations previously assigned to B. macrinii, and B. zapoteca for the easternmost populations of the clade. The new species are diagnosed by less interdigital webbing, distinctive coloration (each with subdued or no white spotting but differing from each other in pattern and hue) and by extensive differentiation in allozymes (B. oaxacensis) and mitochondrial DNA sequences (both species). The new taxa are the third and fourth species of Bolitoglossa endemic to the State of Oaxaca MH - USA MH - Mexico|Distrito Federal MH - Spain PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000178328600004 L2 - GENETIC DIFFERENTIATION; MITOCHONDRIAL GENOME; DNA-SEQUENCES; SUBSTITUTION; BOOTSTRAP; EVOLUTION; LIMITS; GENUS SO - Journal of Herpetology 2002 ;36(3):356-366 6405 UI - 11834 AU - Parra-Olea G AD - Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USAParra-Olea, G, Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, AP 70-153, Mexico City 04510, DF, Mexico TI - Molecular phylogenetic relationships of neotropical salamanders of the genus Pseudoeurycea AB - Pseudoeurycea, with 34 described species, is one of the most diversified groups of neotropical salamanders. I generated a phylogenetic hypothesis of relationships for Pseudoeurycea and related taxa, based on DNA sequences of 16S, Cyt b, and ND4 mitochondrial genes. The analyses include 27 species of Pseudoeurycea and samples from the monotypic Lineatriton, Ixalotriton, and Parvimolge. All phylogenetic analyses resulted in a paraphyletic Pseudoeurycea. Ixalotriton and Pseudoeurycea parva always form a monophyletic group. P. parva is transferred to Ixalotriton based on morphological and molecular grounds. The phylogenetic position of the newly defined Ixalotriton clade is uncertain since it is part of an unresolved basal polytomy. Parvimolge is closely related to Pseudoeurycea, and it is also part of the basal polytomy. Lineatriton, a highly specialized taxon, is deeply nested within Pseudoeurycea. In order to provide a taxonomic arrangement consistent with the monophyly of the different units that reflects both evolutionary history and morphological specialization, Pseudoeurycea should be split into several taxonomic units. (C) 2002 Elsevier Science (USA) MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000173689000007 L2 - MITOCHONDRIAL GENOME; DNA-SEQUENCES; SUBSTITUTION; AMPLIFICATION; CONFIDENCE; BOOTSTRAP; PATTERN; LIMITS; SITES SO - Molecular Phylogenetics and Evolution 2002 ;22(2):234-246 6406 UI - 8956 AU - Parra MS AU - Schnaas L AU - Meydani M AU - Perroni E AU - Martinez S AU - Romieu I AD - Natl Inst Publ Hlth Mexico, Cuernavaca 62508, Morelos, MexicoNatl Inst Perinatol, Dev Neurobiol Dept, Mexico City, DF, MexicoTufts Univ, Jean Mayer USDA Human Nutr Res Ctr Aging, Boston, MA 02111, USAParra, MS, Natl Inst Publ Hlth Mexico, Ave Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Erythrocyte cell membrane phospholipid levels compared against reported dietary intakes of polyunsaturated fatty acids in pregnant Mexican women AB - Objective: To evaluate the validity of a food-frequency questionnaire (FFQ) for assessment of the dietary intakes of polyunsaturated fatty acid (PUFAs) against a biochemical marker of fat intake, erythrocyte cell membrane phospholipid levels, during pregnancy. Design: Cross-sectional analysis. Setting: Developmental Neurobiology Department, National Institute of Perinatology, Mexico City. Subjects: One hundred forty-six healthy pregnant women during the last trimester of pregnancy. Among women enrolled, the first 35 pregnant women (24%) had their erythrocytes analysed for fatty acid status. Methods: We administered an FFQ and compared intakes of PUFAS against their erythrocyte cell membrane concentrations, processed by gas chromatography. Results: Pearson correlation coefficients among alpha-linolenic acid (ALN), docosahexaenoic acid (DHA) and eicosapentaenoic acid in erythrocyte cell membranes against their crude dietary counterparts were 0.32, 0.35 and 0.36 (each P < 0.05). In a simple linear regression, erythrocyte DHA and arachidonic acid (AA) were significantly related to their respective dietary intakes (β = 0.30, 95% confidence interval (CI): 0.007-0.60, P = 0.045 for DHA; β = 0.49, 95% CI: 0.010-0.98, P = 0.044 for AA). Erythrocyte cell membrane ALN concentration (%/total) was only marginally related to ALN dietary intake (mg day(-1)) (β = 0.52, 95% CI: -0.020-1.10, P = 0.061). However, after adjustment for long-chain n-3 PUFA/AA, this association reached significance (β = 0.44, 95% CI: 0.026-0.825, P = 0.038). Main dietary sources for n-3 PUFAs were canned tuna fish and fresh catfish; for n-6 these were eggs. and cow's milk. The use of this FFQ in these pregnant Mexican women provided estimates of average long-term intakes of PUFAs and correlated reasonably well with their erythrocyte cell membrane phospholipid status. However, we need to consider that, during pregnancy, there is a faster turnover of PUFAs from fat storage that may modify the profile of erythrocyte PUFAs and lower the correlation between dietary intake and erythrocyte PUFAs MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 11 U4 - Public, Environmental & Occupational Health;Nutrition & Dietetics U5 - J;Article AV - English IS - 1368-9800 UR - ISI:000181402100018 L2 - polyunsaturated fatty adds;alpha-linolenic acid;docosahexaenoic acid;eicosapentaenoic acid;arachidonic acid;pregnancy;food-frequency questionnaire;erythrocytes;QUESTIONNAIRE; PLASMA; TERM SO - Public Health Nutrition 2002 ;5(6A):931-937 6407 UI - 10563 AU - Parravicini V AU - Gadina M AU - Kovarova M AU - Odom S AU - Gonzalez-Espinosa C AU - Furumoto Y AU - Saitoh S AU - Samelson LE AU - O'Shea JJ AU - Rivera J AD - NCI, Cellular & Mol Biol Lab, NIH, Bethesda, MD 20892, USANIAMSD, Mol Inflammat Sect, NIH, Bethesda, MD 20892, USANIAMSD, Lymphocyte Cell Biol Sect, NIH, Bethesda, MD 20892, USAAcad Sci Czech Republ, Inst Mol Genet, Prague, Czech RepublicRivera, J, IPN, CINVESTAV, Pharmacobiol Dept, Tenorios 235, Mexico City 14330, DF, Mexico TI - Fyn kinase initiates complementary signals required for IgE-dependent mast cell degranulation AB - FcepsilonRI activation of mast cells is thought to involve Lyn and Syk kinases proximal to the receptor and the signaling complex organized by the linker for activation of T cells (LAT). We report here that FcepsilonRI also uses a Fyn kinase-dependent pathway that does not require Lyn kinase or the adapter LAT for its initiation, but is necessary for mast cell degranulation. Lyn-deficiency enhanced Fyn-dependent signals and degranulation, but inhibited the calcium response. Fyn-deficiency impaired degranulation, whereas Lyn-mediated signaling and calcium was normal. Thus, FcepsilonRI-dependent mast cell degranulation involves cross-talk between Fyn and Lyn kinases MH - Czech Republic MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 156 U4 - Immunology U5 - J;Article AV - English IS - 1529-2908 UR - ISI:000177118500013 L2 - FC-EPSILON-RI; PROTEIN-TYROSINE KINASE; LYN-DEFICIENT MICE; HIGH-AFFINITY; T-CELL; AUTOIMMUNE-DISEASE; PLASMA-MEMBRANE; GAMMA-CHAIN; SH2 DOMAIN; ACTIVATION SO - Nature Immunology 2002 ;3(8):741-748 6408 UI - 9467 AU - Parsamian ES AU - Mujica R AU - Corral L AD - VA Ambartsumian Byurakan Astrophys Observ, Byurakan, ArmeniaNatl Inst Astrophys Opt & Elect, Puebla, MexicoParsamian, ES, VA Ambartsumian Byurakan Astrophys Observ, Byurakan, Armenia TI - Spectroscopic observations of subfuors (exors). I. V1118 Ori AB - Spectroscopic observations of the star V1118 Ori during the 1992-94 outburst showed that, as during the 1989 outburst, the spectrum resembles that of a T Tauri star with strong hydrogen and Ca II lines, as well as Fe I, Fe II, He I, and Na I lines of moderate intensity MH - Armenia MH - Mexico|Puebla PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0571-7256 UR - ISI:000180277500001 L2 - stars : flare-individual : V1118 Ori;T-TAURI SO - Astrophysics 2002 ;45(4):393-399 6409 UI - 10864 AU - Parthasarathy V AU - Price EO AU - Orihuela A AU - Dally MR AU - Adams TE AD - Univ Calif Davis, Dept Anim Sci, Davis, CA 95616, USAUniv Autonoma Edo Cuernavaca Morelos, Cuernavaca 62240, Morelos, MexicoParthasarathy, V, Univ Georgia, Dept Psychol, Athens, GA 30602, USA TI - Passive immunization of rams (Ovis aries) against GnRH: effects on antibody titer, serum concentrations of testosterone, and sexual behavior AB - The effect of immunoneutralization of gonadotropin-releasing hormone (GnRH) on serum concentrations of testosterone and sexual behavior was evaluated in sexually mature male sheep. In Experiment 1, GnRH1 rams (n = 16) were passively immunized against GnRH (300 ml antiserum), control rams were either passively immunized against keyhole limpet hemocyanin (KLH, n = 15) or surgically castrated (Wethers1, n = 4). Sexual performance of the rams was assessed weekly for 3 weeks before and 6 weeks after immunization, using ovarihystertoniized ewes actively immunized against GnRH. Experiment 2 evaluated the effects of repeated immunization. Rams were immunized with two aliquots (400 and 300 ml, respectively) of anti-GnRH sera (GnRH, n = 5) or normal sheep serum (NSS, n = 4), 2 weeks apart. Surgically castrated animals were used as a second control group (Wethers2). Administration of anti-GnRH sera, but neither anti-KLH nor NSS sera, resulted in marked reduction (P < 0.05) in serum concentrations of testosterone. Sexual behavior was not consistently affected by administration of one aliquot of anti-GnRH sera, however repeated immunizations resulted in more persistent reduction in serum concentrations of testosterone and more consistent suppression of sexual behavior. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology U5 - J;Article AV - English IS - 0378-4320 UR - ISI:000176451100006 L2 - sheep;rams;passive immunization;anti-GnRH;testosterone;sexual behavior;GONADOTROPIN-RELEASING-HORMONE; OVARIECTOMIZED EWES; LUTEINIZING-HORMONE; ESTROUS EWES; SHEEP; PERFORMANCE; ESTRADIOL; RESPONSES; SECRETION; STIMULI SO - Animal Reproduction Science 2002 ;71(3-4):203-215 6410 UI - 11509 AU - Patricio EFLR AU - Cruz-Lopez L AU - Maile R AU - Tentschert J AU - Jones GR AU - Morgan ED AD - Univ Keele, Sch Chem & Phys, Lennard Jones Lab, Chem Ecol Grp, Keele ST5 5BG, Staffs, EnglandUniv Sao Paulo, Inst Biociencias, Lab Abelhas, BR-05508900 Sao Paulo, SP, BrazilEl Colegio Frontera Sur, Tapachula, Chiapas, MexicoMorgan, ED, Univ Keele, Sch Chem & Phys, Lennard Jones Lab, Chem Ecol Grp, Keele ST5 5BG, Staffs, England TI - The propolis of stingless bees: terpenes from the tibia of three Frieseomelitta species AB - The posterior tibia of foraging workers of three species of Frieseomelitta (Hymenoptera: Meliponinae) stingless bees have been shown to carry complex mixtures of plant-derived mono-, sesqui-, di- and tri-terpenes. These subtances were not found on the fore-or mid-legs, nor on other parts of the hind legs. F. silvestrii and F. silvestrii languida, when collecting. appear to exploit different plants for their resin even when housed in the same area. F. varia were found to be not collecting resin at the time of the initial sampling and were therefore sampled later. Mature foragers carry the resin. In the samples studied here, particularly prominent were the monoterpene alpha-pinene, the sesquiterpenes beta-caryophyllene, alpha-cubebene. alpha- and gamma-muurolene. gamma-cadinene, germacrene-D, and elemol and the diterpenes manool and totarol The collected material is used for the resin placed around the entrance to their nests and is also mixed with wax, to produce the cerum used for the structures in the nest. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Brazil MH - United Kingdom MH - Mexico|Chiapas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Entomology;Physiology U5 - J;Article AV - English IS - 0022-1910 UR - ISI:000174738100013 L2 - stingless bees;propolis;plant resin;monoterpenes;sesquiterpenes;diterpenes;triterpenes;beta-caryophyllene;alpha-cubebene;delta-cadinene;manool;totarol;HYMENOPTERA; MELIPONINAE; CHEMISTRY; VOLATILES SO - Journal of Insect Physiology 2002 ;48(2):249-254 6411 UI - 10308 AU - Patzer JF AU - Mazariegos GV AU - Lopez R AD - Univ Pittsburgh, Dept Surg, Pittsburgh, PA 15261, USAUniv Pittsburgh, Dept Chem Engn, Pittsburgh, PA 15261, USAUniv Pittsburgh, Inst Transplantat, Pittsburgh, PA 15261, USAUniv Pittsburgh, McGowan Inst Regenerat Med, Pittsburgh, PA 15261, USAUniv Monterrey, Dept Surg, Monterrey, ML, MexicoPatzer, JF, Univ Pittsburgh, Dept Surg, 1249 Benedum Hall, Pittsburgh, PA 15261 USA TI - Preclinical evaluation of the Excorp Medical, Inc, bioartificial liver support system AB - BACKGROUND: Acute liver failure has no medically recognized effective therapy other than orthotopic liver transplantation. Development of bioartificial livers for support of patients with acute liver failure requires meaningful preclinical evaluation before clinical trials. STUDY DESIGN: Complete results from preclinical safety and efficacy evaluation of the Excorp Medical Bioartificial Liver Support System (BLSS) using a D-galactosamine (D-gal) canine liver failure model are presented. From a total cohort of 23 purpose-bred male hounds, 18 animals were administered a lethal dose (1.5 g/kg) of D-gal. The 18 animals were divided into four treatment groups: no BLSS treatment (n = 6), BLSS treatment starting at 24 to 26 hours post D-gal (n = 5), BLSS treatment starting at 16 to 18 hours post D-gal (n = 4), and "mock support" treatment with a BLSS system containing no hepatocytes (n = 3). The animals were treated until death or death equivalent, or euthanized at 60 hours. Physiologic parameters were continuously monitored. Blood chemistries were obtained every 8 hours. RESULTS: Although survival times for BLSS-supported animals were significantly greater than for the unsupported group, the greatest impact on delaying progression of liver disease was time of intervention. Intervention at 16 to 18 hours post D-gal administration showed significant delay in increasing blood ammonia, lactate, and prothrombin time as compared with untreated animals. Elevated intracranial pressure was found in two of six untreated animals, but in none of the treated animals (zero of nine). Healthy animals supported by the BLSS system evidenced no significant safety problems. CONCLUSIONS: Results suggest the BLSS impacts the course of liver failure in the animal model. Phase I clinical safety evaluation is underway. (C) 2002 by the American College of Surgeons MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 11 U4 - Surgery U5 - J;Article AV - English IS - 1072-7515 UR - ISI:000177875700001 L2 - FULMINANT HEPATIC-FAILURE; CLINICAL-EXPERIENCE; TRIAL SO - Journal of the American College of Surgeons 2002 ;195(3):299-310 6412 UI - 10389 AU - Pavia EG AU - Graef F AD - CICESE, Ensenada, Baja California, MexicoPavia, EG, CICESE, POB 434844, San Diego, CA 92143, USA TI - The recent rainfall climatology of the Mediterranean Californias AB - In this work, recent (1948-2001) rainfall data in a southwestern California station (San Diego) and a northwestern Baja California station (Ensenada) within a region called Mediterranean California, around 33degreesN, 117degreesW, are studied. Cumulative annual means are used as indicators of climatological variability; but the entire datasets are analyzed by modeling the histogram of each set as a Weibull distribution probability density function, f. The climatology of both stations, defined simply as the arithmetic average, is compared with their theoretical mean; that is, the first moment of f. It is assumed that this comparison would be indicative of the reliability of the available rainfall climatologies. If these assumptions hold, in particular if the data is indeed Weibull distributed, it can be concluded that the climatological annual mean precipitation in this region is slightly overestimated at this time MH - Mexico|Baja California MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0894-8755 UR - ISI:000177573200009 L2 - WEIBULL SO - Journal of Climate 2002 ;15(18):2697-2701 6413 UI - 10536 AU - Pecchi G AU - Reyes P AU - Lopez T AU - Gomez R AU - Moreno A AU - Fierro JLG AD - Concepcion Univ, Fac Ciencias Quim, Concepcion, ChileUniv Autonoma Metropolitana Iztapalapa, Mexico City 55534, DF, MexicoCSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, SpainPecchi, G, Concepcion Univ, Fac Ciencias Quim, Casilla 160-C, Concepcion, Chile TI - Effect of precursors on surface and catalytic properties of Fe/TiO2 catalysts AB - Titania-supported iron (5wt%) catalysts were prepared by a sol-gel method using different gelation pH and metal precursors (Fe(II) and Fe(III)). Characterization data of calcined catalysts revealed that, irrespective of the nature of the metal precursor, iron is present in all cases as ferric oxide. However, the crystalline phase exhibited by titania does depend on the metal precursor used. The catalytic activity of the catalysts, tested in the combustion of methane at atmospheric pressure, is not related to the dispersion of iron oxide. Thus, Fe3+ ions may be obtained in two extreme situations; one highly dispersed in which Fe3+ ions are placed in the titania network and another in which large Fe2O3 crystals are located on the surface of the catalyst. The former exhibits the best performance in the combustion of methane. (C) 2002 Society of Chemical Industry MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0268-2575 UR - ISI:000177228900012 L2 - iron catalysts;sol-gel;titanium oxide;combustion;methane;MODEL SUPPORTED CATALYSTS; SOL-GEL METHOD; PHYSICAL CHARACTERIZATION; METHANE COMBUSTION; REDUCTION BEHAVIOR; PT/SIO2 CATALYSTS; OXIDATION; SYSTEM; METALS; TIO2 SO - Journal of Chemical Technology and Biotechnology 2002 ;77(8):944-949 6414 UI - 10772 AU - Pecchi G AU - Reyes P AU - Lopez T AU - Gomez R AU - Moreno A AU - Fierro JLG AD - Concepcion Univ, Fac Ciencias Quim, Concepcion, ChileUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoCSIC, Inst Catalisis & Petr Quim, Madrid 28049, SpainPecchi, G, Concepcion Univ, Fac Ciencias Quim, Casilla 160-C, Concepcion, Chile TI - Effect of chlorine precursor in surface and catalytic properties of Fe/TiO2 catalysts AB - Titania-supported iron (1wt%) catalysts were prepared by the sol-gel method using different gelation pH (3 and 9), metal precursors (FeCl2 and FeCl3) and calcination temperatures (873 and 1073K). Characterization data of calcined catalysts revealed that in all samples the dominant iron species is Fe 31 and the crystalline phase of the TiO2 substrate depends on the gelation pH and the metal precursor used. It was found that in the Fe/TiO2 ex-FeCl3 samples an important part of the iron ions became inserted in titania lattice, which makes the anatase phase stable even at high calcination temperatures. The solids were tested in the combustion of methane under stoichiometric conditions at atmospheric pressure. It was observed that the Fe/TiO2 ex-FeCl2 sample displays the highest activity. This behaviour is explained on the basis of the highest fraction of iron oxide deposited on the external surface of the catalyst particles MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - CONCEPCION: SOCIEDAD CHILENA DE QUIMICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0366-1644 UR - ISI:000176814300016 L2 - iron catalysts;sol-gel;titanium oxide;combustion;methane;MODEL SUPPORTED CATALYSTS; SOL-GEL METHOD; PHYSICAL CHARACTERIZATION; METHANE COMBUSTION; REDUCTION BEHAVIOR; TITANIUM ALKOXIDE; PT/SIO2 CATALYSTS; HYDROLYSIS; OXIDATION SO - Boletin de la Sociedad Chilena de Quimica 2002 ;47(2):191-197 6415 UI - 11563 AU - Pena-Cabrera E AU - Liebeskind LS AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, Gto, MexicoEmory Univ, Dept Chem, Atlanta, GA 30322, USAPena-Cabrera, E, Univ Guanajuato, Fac Quim, Col Noria Alta S-N, Guanajuato 36050, Gto, Mexico TI - Squaric acid ester-based total synthesis of echinochrome A AB - The total synthesis of echinochrome A is described. Both key intermediates 5 and 8 were efficiently prepared from diisopropyl squarate 7. Nucleophilic addition of aryllithium 8 to 5, followed by thermal ring-expansion/ cyclization of the 1,2-adduct 4, furnished hydroquinone 3. Oxidation and full deprotection of 3 gave the title compound MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000174399200038 L2 - OXIDE SO - Journal of Organic Chemistry 2002 ;67(5):1689-1691 6416 UI - 9863 AU - Pena-Ramos EA AU - Xiong YL AD - Ctr Invest Alimentac & Desarrollo AC, Anim Derived Food Dept, Hermosillo 83000, Sonora, MexicoUniv Kentucky, Dept Anim Sci, Food Sci Sect, Lexington, KY 40546, USAXiong, YL, Univ Kentucky, Dept Anim Sci, Food Sci Sect, Lexington, KY 40546 USA TI - Antioxidant activity of soy protein hydrolysates in a liposomal system AB - Native and heated soy protein isolate was hydrolyzed with 3 purified (pepsin, papain, and chymotrypsin) and 3 crude (Alcalase(R), Protamex(TM), and Flavourzyme(TM)) proteases. The hydrolysates were incubated (37 degreesC, 1 h) with a liposome-oxidizing system (50 muM FeCl3/0.1 mM ascorbate, pH 7.0) to test antioxidant activities by determining the concentrations of TBARS. Degree of hydrolysis of SPI hydrolysates ranged from 1.7 to 20.6%. Both hydrolyzed and nonhydrolyzed SPI decreased TBARS (by 28 to 65%), except for papain-hydrolyzed samples. Samples of chymotrypsin- and Flavourzyme-hydrolyzed (0.5 h) preheated SPI had the greatest inhibitory effect on lipid oxidation MH - USA MH - Mexico|Sonora PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 17 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000179254300027 L2 - soy protein;antioxidants;hydrolysis;oxidation;SOYBEAN PROTEIN; LIPID-PEROXIDATION; CARNOSINE; PEPTIDES; ACID; OXIDATION; FRACTION; DIGESTS; MUSCLE; BEEF SO - Journal of Food Science 2002 ;67(8):2952-2956 6417 UI - 11467 AU - Pena-Rangel MT AU - Rodriguez I AU - Riesgo-Escovar JR AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Dev Neurobiol & Neurophysiol, Queretaro 76230, MexicoUniv Autonoma Queretaro, Fac Ciecias Nat, Queretaro 76010, MexicoUniv Autonoma Madrid, CSIC, Ctr Biol Mol Severo Ochoa, E-28049 Madrid, SpainRiesgo-Escovar, JR, UNAM, Dept Dev Neurobiol, Inst Neurobiol, Futbol 149,Col Country Club, Mexico City 04220, DF, Mexico TI - A misexpression study examining dorsal thorax formation in Drosophila melanogaster AB - We studied thorax formation in Drosophila melanogaster using a misexpression screen with EP lines and thoracic Gal4 drivers that provide a genetically sensitized background. We identified 191 interacting lines showing alterations of thoracic bristles (number and/or location), thorax and scutellum malformations, lethality, or suppression of the thoracic phenotype used in the screen. We analyzed these lines and showed that known genes with different functional roles (selector, prepattern, proneural, cell cycle regulation, lineage restriction, signaling pathways, transcriptional control, and chromatin organization) are among the modifier lines. A few lines have previously been identified in thorax formation, but others, such as chromatin-remodeling complex genes, are novel. However, most of the interacting loci are uncharacterized, providing a wealth of new genetic data. We also describe one such novel line, poco pelo (ppv), where both misexpression and loss-of-function phenotypes are similar: loss of bristles and scutellum malformation MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - BALTIMORE: GENETICS RP - NOT IN FILE U3 - TC 22 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6731 UR - ISI:000174790600018 L2 - TRANSCRIPTION FACTOR; REMODELING FACTOR; GENE-EXPRESSION; SENSORY ORGAN; NEGATIVE REGULATOR; JNK PATHWAY; CELL-CYCLE; COMPLEX; ENCODES; PROTEIN SO - Genetics 2002 ;160(3):1035-1050 6418 UI - 11458 AU - Pena C AU - Galindo E AU - Diaz M AD - Univ Oviedo, Dept Chem Engn, Oviedo 33006, SpainNatl Autonomous Univ Mexico, Dept Bioengn, Inst Biotechnol, Cuernavaca 62250, Morelos, MexicoDiaz, M, Univ Oviedo, Dept Chem Engn, C Julian Claveria S-N, Oviedo 33006, Spain TI - Effectiveness factor in biological external convection: study in high viscosity systems AB - A study regarding the influence of mixing on the efficiency of alginate and xanthan synthesis was carried out. The effectiveness of these two systems in terms of a dimensionless reaction convection number (N-RC), which is a function of the power input per unit volume, was analysed and compared with low viscosity systems. The results revealed that a decrease in the power input caused a reduction in the growth rate as well as in production rate. It was observed that the effectiveness factor (n) both for alginate production and xanthan synthesis resulted weakly dependent on the biomass content. A good correlation between effectiveness and N-RC was obtained for the two tested models. N-RC number could be appropriately employed in correlating the effectiveness factor for processes with viscosities from 0.001 to more than 1 kg m(-1)s(-1). Due to the parallelism with the conventional internal diffusion approach (Thiele modulus), the advantages for applying N-RC in particular to correlate the efficiency in systems limited both for external convection and internal diffusional resistance, are shown. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0168-1656 UR - ISI:000174859800001 L2 - mixing;convection;polysaccharide;diffusion;bioreactor;XANTHOMONAS-CAMPESTRIS; XANTHAN PRODUCTION; AGITATOR SPEED; SHAKE FLASKS; FERMENTATION; POWER; BIOREACTORS; EVOLUTION; KINETICS; GUM SO - Journal of Biotechnology 2002 ;95(1):1-12 6419 UI - 11880 AU - Pena JH AU - Paparo M AU - Peniche R AU - Rodriguez M AU - Hobart MA AU - De la Cruz C AU - Garcia-Cole A AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoHungarian Acad Sci, Konkoly Observ, H-1525 Budapest, HungaryUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Veracruzana, Xalapa 91090, Veracruz, MexicoInst Astrofis Andalucia, E-18080 Granada, SpainUniv Nacl Autonoma Mexico, Colegio Ciencias & Humanidades Sur, Mexico City 04510, DF, MexicoPena, JH, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Physical parameter determination of the delta Scuti star V1719 Cygni AB - New uvbybeta photoelectric photometry of the short-period variable star V1719 Cygni (HD 200925) has been secured. A period analysis of these data and those reported in the literature has provided us with stable pulsation frequencies that fit all the available observations covering a time span of 20 yr. The frequencies determined are 3.7411556, 7.4823111, 11.2234667, and 4.6777749 cycles day(-1) and of smaller amplitude 8.4189900 cycles day(-1). It was found that this Population I star has around 3.1 and an effective temperature log g of 6750 K MH - Hungary MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6280 UR - ISI:000173597900011 L2 - RR LYRAE STARS; EMPIRICAL CALIBRATIONS; UVBY PHOTOMETRY; BETA PHOTOMETRY; PRAESEPE; SYSTEMS; GRIDS SO - Publications of the Astronomical Society of the Pacific 2002 ;114(792):214-223 6420 UI - 11603 AU - Peng GX AU - Tan ZY AU - Wang ET AU - Reinhold-Hurek B AU - Chen WF AU - Chen WX AD - China Agr Univ, Dept Microbiol, Coll Biol Sci, Beijing 100094, Peoples R ChinaUniv Bremen, Fac Biol & Chem, Lab Gen Microbiol, D-28334 Bremen, GermanyIPN, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 07738, DF, MexicoChen, WX, China Agr Univ, Dept Microbiol, Coll Biol Sci, Beijing 100094, Peoples R China TI - Identification of isolates from soybean nodules in Xinjiang Region as Sinorhizobium xinjiangense and genetic differentiation of S-xinjiangense from Sinorhizobium fredii AB - Eight fast-growing rhizobial isolates from Xinjiang soils were identified as Sinorhizobium xinjiangense by analyses of 16S rRNA gene sequences, SDS-PAGE of proteins, intergenic spacer sequences and DNA-DNA hybridization. Based on all of the results, these isolates and the reference strains for S. xinjiangense were a distinct genomic species, although the 16S rRNA genes were closely related to that of Sinorhizobium fredii MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000174516900017 L2 - phylogeny;DNA-DNA relatedness;Sinorhizobium xinjiangense;soybean;Xinjiang region;INTERGENIC SPACER REGIONS; SP-NOV; RHIZOBIUM-FREDII; GEN-NOV; BACTERIA; ENVIRONMENT; PROPOSAL; TREES; PCR SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():457-462 6421 UI - 10247 AU - Peniche-Cardena A AU - Dominguez-Alpizar JL AU - Sima-Alvarez R AU - rgaez-Rodriguez F AU - Fraser A AU - Craig PS AU - Rodriguez-Canul R AD - CINVESTAV, Lab Immunol & Biol Mol, IPN, Unidad Merida, Merida 97310, Yucatan, MexicoUniv Autonoma Yucatan, Lab Parasitol & Salud Publ Vet, Fac Med Vet & Zootecn, UADY, Merida 97100, Yucatan, MexicoUniv Salford, Cestode Zoonoses Res Grp, Biosci Res Inst, Sch Environm & Life Sci, Salford M5 4WT, Lancs, EnglandRodriguez-Canul, R, CINVESTAV, Lab Immunol & Biol Mol, IPN, Unidad Merida, Carretera Antigua Progreso Km 6, Merida 97310, Yucatan, Mexico TI - Chemotherapy of porcine cysticercosis with albendazole sulphoxide AB - Cysticercosis is a zoonotic disease of humans produced by the larval stage of swine parasite, Taenia solium. Chemotherapy of infected pigs is a possible strategy for avoiding disease transmission and improving health programs in endemic areas of cysticercosis. In this preliminary study, seven naturally infected pigs from 6 to 12 months of age were allotted to treated (n = 4) and control groups (n = 3). The treated animals received a subcutaneous injection in their forelegs and thighs of 15 mg/kg per body weight of albendazole sulphoxide (ABZSO; Pisa, Mexico) once per day for 8 days. At the same time, the control group received a subcutaneous injection of saline solution (9% NaCl). After 12 weeks, all the animals were slaughtered and at least 200 metacestodes were isolated from the muscles and brain of each animal. Using histology and the metacestode viability criteria described in this study, treated animals had no viable cysts in their muscle (0/200), while 7 of 17 (41.1%) viable cysts were observed in those isolated from their brains. In the control group, 183/200 (91.5%) muscle metacestodes were viable and from brain, 22/29 (75.8%) metacestodes were viable. The 15 mg/kg per body weight dosage of ABZSO was 100% effective against muscular cysticercosis as shown by the lack of viable cysts and the micro-calcifications in meat from the treated pigs. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000177964400006 L2 - anti-helminthic;benzimidazole;albendazole sulphoxide;chemotherapy;Taenia solium porcine;cysticercosis;TAENIA-SOLIUM CYSTICERCOSIS; OXFENDAZOLE; MEXICO; PIGS; PRAZIQUANTEL; DIAGNOSIS; THERAPY SO - Veterinary Parasitology 2002 ;108(1):63-73 6422 UI - 10766 AU - Peralta-Videa JR AU - Gardea-Torresdey JL AU - Gomez E AU - Tiemann KJ AU - Parsons JG AU - Carrillo G AD - Univ Texas, Environm Sci & Engn PhD Program, El Paso, TX 79968, USAITESM, El Paso, TX 79995, USAUniv Texas, Dept Chem, El Paso, TX 79968, USAIREGEP, Colegio Postgrad, Montecillo 56230, MexicoGardea-Torresdey, JL, Univ Texas, Environm Sci & Engn PhD Program, El Paso, TX 79968 USA TI - Effect of mixed cadmium, copper, nickel and zinc at different pHs upon alfalfa growth and heavy metal uptake AB - Alfalfa plants were grown in soil-pots contaminated with a mixture of Cd(II), Cu(II), Ni(II), and Zn(II), (at 50 mg/kg each) Lit pHs of 4.5, 5.8, and 7.1. The plants were fertilized using a nutrient solution, which was adjusted appropriately to the same pH. Plants in the control treatment were grown in the absence of the heavy metals mixture. The growth of the control plants was the same at the three pHs studied and the heavy metal stressed plants also showed similar behavior at each pHs. There were statistically significant differences (P<0.05) between the shoot length of the control treatment plants and the length of plants grown in the presence of the heavy metal mixture. Under the effects of the heavy metal mixture, nickel was the most accumulated element in the shoot tissue, with 437, 333, and 308 ppm at pH 7.1, 5.8, and 4.5, respectively. Cadmium was found to be second in accumulated concentrations with 202 ppm, 124 ppm, and 132 ppm at pH 7.1, 5.8, and 4.5, respectively; while zinc was third, followed by copper. The maximum relative uptakes (element in plant/element in soil-water-solution) were found to be 26 times for nickel, 23 times for cadmium, 12 times for zinc, and 6 times for copper. We considered these relations as indicative of the ability of alfalfa plants to take up elements from a soil matrix contaminated with a mixture of cadmium, copper, nickel, and zinc. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 23 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000176728400003 L2 - CONTAMINATED SOIL; PLANT-GROWTH; ACCUMULATION; RESPONSES; ROOTS; ZN; CD SO - Environmental Pollution 2002 ;119(3):291-301 6423 UI - 10910 AU - Peralta-Videa JR AU - Gardea-Torresdey JL AU - Gomez E AU - Tiemann KJ AU - Parsons JG AU - de la Rosa G AU - Carrillo G AD - Univ Texas, Environm Sci & Engn Program, El Paso, TX 79968, USAITESM, El Paso, TX 79995, USAUniv Texas, Dept Chem, El Paso, TX 79968, USAIREGEP, Colegio Postgraduados, Montecillo 56230, MexicoGardea-Torresdey, JL, Univ Texas, Environm Sci & Engn Program, El Paso, TX 79968 USA TI - Potential of alfalfa plant to phytoremediate individually contaminated montmorillonite-soils with cadmium(II), chromium(VI), copper(II), nickel(II), and zinc(II) MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000176297800012 L2 - METALS; GROWTH SO - Bulletin of Environmental Contamination and Toxicology 2002 ;69(1):74-81 6424 UI - 10577 AU - Peralta MV AU - Dix M AU - Lesemann M AU - Wakeham WA AD - Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2BY, EnglandPeralta, MV, Inst Invest Elect, Av Reforma No 113 Col Palmira, Temixco 62490, Morelos, Mexico TI - Thermal conductivity of liquid mercury AB - The thermal conductivity of liquid mercury has been measured in a range of temperature from 300 to 520 K at atmospheric pressure. The measurements were carried out with a new experimental technique based on the transient hot-wire technique. Special efforts have been made to ensure the elimination of the phenomenon of convection, which is one of the main problems found in the measurement of the thermal conductivity of molten metals. The results obtained demonstrate the validity of the theoretical model of the experimental technique and they support the claimed accuracy of +/-2%. The present results are compared with the disparate values reported in the literature by other authors and are thought to be of a superior accuracy MH - United Kingdom MH - Mexico|Morelos PB - LONDON: PION LTD RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Mechanics;Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0018-1544 UR - ISI:000177099300005 SO - High Temperatures-High Pressures 2002 ;34(1):35-39 6425 UI - 9375 AU - Peralta RD AU - Infante R AU - Cortez G AU - Angulo JL AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Volumetric properties of ethylbenzene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of ethylbenzene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densitometer. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are positive for the systems ethylbenzene + (methyl methacrylate, ethyl acrylate) and negative for the systems ethylbenzene + (butyl acrylate, styrene) MH - Israel MH - Mexico|Coahuila PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-9104 UR - ISI:000180365300001 L2 - densities;excess volumes;monomers;ethylbenzene;EXCESS VOLUMES; BEHAVIOR; MIXTURES; ESTERS SO - Physics and Chemistry of Liquids 2002 ;40(6):649-660 6426 UI - 10723 AU - Peralta RD AU - Infante R AU - Cortez G AU - Villarreal L AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Volumetric properties of cyclohexane with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of cyclohexane with ethyl acrylate (EA), butyl acrylate (BA), methyl methacrylate (MMA), and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densitometer. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are positive for the systems reported here. (C) 2002 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000176793300006 L2 - densities;excess volumes;monomers;cyclohexane;EXCESS VOLUMES; BEHAVIOR; MIXTURES; ESTERS SO - Thermochimica Acta 2002 ;390(1-2):47-53 6427 UI - 10937 AU - Peralta RD AU - Infante R AU - Cortez G AU - Rodriguez O AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Volumetric properties of toluene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 25 degrees C AB - Densities of the binary systems of toluene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 25degreesC and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densitometer. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for systems toluene + (ethyl acrylate, butyl acrylate, and styrene) and positive for the system toluene + methyl methacrylate MH - Israel MH - Mexico|Coahuila PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0095-9782 UR - ISI:000176190000001 L2 - densities;excess volumes;monomers;toluene;alkyl acrylates;styrene;densimeter;MIXTURES SO - Journal of Solution Chemistry 2002 ;31(3):175-186 6428 UI - 9730 AU - Perea-Lopez N AU - Rakov N AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Consensada, Ensenada 22800, Baja California, MexicoUNAM, CCMC, San Ysidro, CA 92143, USAXiao, MF, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Consensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - Current-heating formation of small holes in thin gold or silver films AB - We describe a process to form small holes in thin gold or silver films. The prepared films are useful for optical studies on surface plasmon induced transmission as well as some related phenomena. (C) 2002 American Institute of Physics MH - Mexico|Baja California MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000179393200046 SO - Review of Scientific Instruments 2002 ;73(12):4399-4401 6429 UI - 11420 AU - Pereira-Suarez AL AU - Meraz MA AU - Lizanoc M AU - Estrada-Chavez C AU - Hernandez F AU - Olivera P AU - Perez E AU - Padilla P AU - Yaniv M AU - Thierry F AU - Garcia-Carranca A AD - Natl Autonomous Univ Mexico, BIOMEDICAS, Dept Mol Biol & Biotechnol, Mexico City 04510, DF, MexicoInst Nacl Carbon, SSA, Div Invest, Mexico City, DF, MexicoEscola Paulista Med, Dept Mol Biol, Mexico City, DF, MexicoIMSS, Ctr Med Puebla, Puebla, MexicoIMSS, Hosp Victorio Fuente Narvaez, Mexico City, DF, MexicoInst Pasteur, Dept Biotechnol, Unite Virus Oncogenes, Paris, FranceGarcia-Carranca, A, Natl Autonomous Univ Mexico, BIOMEDICAS, Dept Mol Biol & Biotechnol, Apartado Postal 70-228, Mexico City 04510, DF, Mexico TI - Frequent alterations of the beta-catenin protein in cancer of the uterine cervix AB - Cancer of the uterine cervix is still the leading cause of death among women with cancer in developing countries. Although infections with human papillomavirus are necessary, other molecular alterations that are needed at the cellular level for development of these tumors remain largely unknown. beta-Catenin is a key regulator located within the Wnt signaling cascade whose alterations constitute an important event in colon carcinogenesis. In many malignancies increased levels of the beta-catenin protein have been found, associated with its nuclear and/or cytoplasmic accumulation. To search for possible alterations of this pathway we examined the expression and localization of the beta-catenin protein in tumors from the uterine cervix and cell lines derived from them. beta-Catenin was found accumulated in the cytoplasm and/or nuclei of 12 out of 32 samples. In accordance, increased levels of this protein were observed in 9 out of 20 tumors analyzed. Importantly, PCR-SSCP and sequence analysis showed no mutations in exons 3, 4 and 6 of the beta-catenin gene. Our findings indicate that alterations of beta-catenin are frequent in these tumors and suggest that they may play an important role in the development of cancer of the uterine cervix. They also indicate that higher protein levels and abnormal localization may result from several different mechanisms. Copyright (C) 2002 S, Karger AG, Basel MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 6 U4 - Oncology U5 - J;Article AV - English IS - 1010-4283 UR - ISI:000174879200003 L2 - beta-catenin;uterine cervix;cancer;protein level;cellular localization;APC TUMOR-SUPPRESSOR; CELL-LINES; E-CADHERIN; HEPATOCELLULAR CARCINOMAS; COLORECTAL CARCINOMAS; HUMAN-PAPILLOMAVIRUS; CYCLIN D1; MUTATIONS; GENE; EXPRESSION SO - Tumor Biology 2002 ;23(1):45-53 6430 UI - 10927 AU - Pereyra P AU - Castillo E AD - Univ Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Mexico City 02200, DF, MexicoAbdus Salam Int Ctr Theoret Phys, Trieste, ItalyUniv Guadalajara, Dept Fis, Guadalajara 44100, Jalisco, MexicoPereyra, P, Univ Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Av S Pablo 180, Mexico City 02200, DF, Mexico TI - Theory of finite periodic systems: General expressions and various simple and illustrative examples AB - A comprehensive presentation of an approach to finite periodic systems is given. The general expressions obtained here allow simple and precise calculations of various physical quantities characteristic of crystalline systems. Transmission amplitudes through n-cell multichannel quantum systems are rigorously derived. General expressions for several physical quantities are entirely expressed in terms of single-cell amplitudes and a new class of polynomials p(N,n). Besides the general expressions, we study some superlattice properties such as the band structure and its relation to the phase coherence phenomena, the level density and the Kronig-Penney model as its continous espectrum limit. Band structure tailoring, optical multilayer systems, resonant energies and functions, and channel-mixing effects in multichannel transport processes are also analyzed in the light of this approach MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000176066600041 L2 - MULTILAYER SYSTEMS; TRANSFER-MATRIX; TUNNELING TIME; SCATTERING; HETEROSTRUCTURES; TRANSPORT; SUPERLATTICES; PARAMETRIZATION; SYMMETRIES; HOLES SO - Physical Review B 2002 ;65(20): 6431 UI - 8985 AU - Perez-Castro EE AU - May-Itza WD AU - Quezada-Euan JJG AD - Univ Autonoma Yucatan, Dept Apicultura, Fac Med Vet & Zootecn, Merida 97100, Yucutan, MexicoUniv Nacl Ctr Peru, Fac Zootecn, Uancayo, PeruQuezada-Euan, JJG, Univ Autonoma Yucatan, Dept Apicultura, Fac Med Vet & Zootecn, Apdo Postal 4-116, Merida 97100, Yucutan, Mexico TI - Thirty years after: a survey on the distribution and expansion of Africanized honey bees (Apis mellifera) in Peru AB - Peru is one of the first South American countries colonized by Africanized honey bees (AHB). Paradoxically, little information is available on the distribution and economic impact of AHB on the beekeeping industry of the country. In this study we report the results of a survey of 186 managed colonies sampled during July 2000 in 16 departments of Peru covering all climatic environments within two transects. Morphometric classification showed that AHB colonies were found in all the Peruvian departments under study. However, the occupation of the Peruvian territory by AHB has produced varied levels of Africanization. Only 53% of the colonies were of 'pure' Africanized morphotype, whilst 30% were of intermediate African-European categories and 17% were of 'pure' European morphotype. There were also significant differences in the percentage of AHB colonies between departments and transects: the tropical departments and transects of the east were practically saturated with AHB colonies, but the tropical areas of the western Pacific coast showed more predominance of European honey bee (EHB) colonies. These results suggest that hybridization between EHB and AHB in western Peru has occurred as a result of reduced numerical advantages of the latter, in this case, due to a geographic barrier limiting the continued influx of AHB swarms. Currently, the beekeeping industry in Peru is increasing which probably reflects the adaptation of a new generation of beekeepers to AHB. We suggest that the establishment of national plans for selection and transfer of technology are feasible given the great potential for beekeeping in Peru MH - Mexico|Yucatan MH - Peru PB - CARDIFF: INT BEE RESEARCH ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0021-8839 UR - ISI:000181457300001 L2 - Africanized honey bees;Apis mellifera;morphometrics;beekeeping;Peru SO - Journal of Apicultural Research 2002 ;41(3-4):69-73 6432 UI - 11137 AU - Perez-Flores MA AU - Schultz A AD - CICESE Earth Sci, Ensenada 22860, Baja California, MexicoUniv Wales Coll Cardiff, Dept Earth Sci, Cardiff CF10 3YE, S Glam, WalesPerez-Flores, MA, CICESE Earth Sci, Km 107 Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - Application of 2-D inversion with genetic algorithms to magnetotelluric data from geothermal areas AB - We apply a modified genetic algorithm, the "recombinant genetic analogue" (RGA) to the inversion of magnetotelluric (MT) data from two different geothermal areas, one in El Salvador and another in Japan. An accurate 2-D forward modelling algorithm suitable for very heterogeneous models forms the core of the inverse solver. The forward solution makes use of a gridding algorithm that depends on both model structure and frequency. The RGA represents model parameters as parallel sets of bit strings, and differs from conventional genetic algorithms in the ways in which the bit strings are manipulated in order to increase the probability of convergence to a global minimum objective function model. A synthetic data set was generated from a chessboard model, and the RGA was shown capable of reconstructing the model to an acceptable tolerance. The algorithm was applied to NIT data from Ahuachapan geothermal area in El Salvador and compared with other interpretations. Data from the geothermal area of Minamikayabe in Japan served as a second test case. The RGA is highly adaptable and well suited to non-linear hypothesis testing as well as to inverse modelling MH - Mexico|Baja California MH - United Kingdom PB - TOKYO: TERRA SCIENTIFIC PUBL CO RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1343-8832 UR - ISI:000175653400017 L2 - INDUCTION SO - Earth Planets and Space 2002 ;54(5):607-616 6433 UI - 9825 AU - Perez-Lachaud G AU - Hardy ICW AU - Lachaud JP AD - Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, Leics, EnglandEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Toulouse 3, FRE CNRS 2382, Lab Ethol & Cognit Anim, F-31062 Toulouse, FranceHardy, ICW, Univ Nottingham, Sch Biosci, Sutton Bonington Campus, Loughborough LE12 5RD, Leics, England TI - Insect gladiators: competitive interactions between three species of bethylid wasps attacking the coffee berry borer, Hypothenemus hampei (Coleoptera : Scolytidae) AB - The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), originates from Africa and has since invaded all major coffee growing areas in the world. The parasitoid species, Cephalonomia stephanoderis Betrem and Prorops nasuta Waterston (Hymenoptera: Bethylidae) have been introduced into many countries as biological control agents. Recently, a further bethylid, Cephalonomia hyalinipennis Ashmead, was found naturally attacking the coffee berry borer in southern Mexico. The biologies of these three species are broadly similar. We evaluate the potential for interspecific competition by observing direct behavioral contests for hosts occurring between adult female parasitoids. We show that such contests readily occur and the loser is frequently killed. Prior ownership of hosts and ovipositional experience influence contest outcome, probably via the dynamics of egg maturation. There are also competitive asymmetries between these species: C stephanoderis is generally the most successful. We discuss the implications of interspecific competition on the question of the best number and combination of natural enemy species for biological pest control. (C) 2002 Elsevier Science (USA). All rights reserved MH - United Kingdom MH - France MH - Mexico|Chiapas PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000179236100004 L2 - agonistic behavior;prior ownership;previous experience;coffee berry borer;biological control;bethylidae;Cephalonomia stephanoderis;Cephalonomia hyalimpennis;Prorops nasuta;BIOLOGICAL-CONTROL; PARASITOID WASP; PATCH DEFENSE; CEPHALONOMIA-STEPHANODERIS; TRISSOLCUS-BASALIS; ANIMAL CONTESTS; CLUTCH SIZE; SEX-RATIO; GAME; HYMENOPTERA SO - Biological Control 2002 ;25(3):231-238 6434 UI - 9325 AU - Perez-Marin L AU - Gutierrez-Lozano O AU - Otazo-Sanchez E AU - Lopez-Valdivia H AU - vila-Perez P AU - Arias O AU - Estevez O AD - Inst Tecnol Toluca, Metepec 52140, Edo, MexicoUniv La Habana, Inst Mat & Reactivos, Havana, CubaInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUnvi Autonoma Estado Hidalgo, Ctr Invest Quim, Hidalgo, MexicoOtazo-Sanchez, E, Inst Tecnol Toluca, Ave Tecnol S-N, Metepec 52140, Edo, Mexico TI - The 1-furoyl-3-ciclohexylthiourea as ionophore mercury (II) ion-selective electrode. Twice Nernstian response AB - With 1-Furoyl-3-Ciclohexytthiourea as neutral mobile carrier, a selective liquid membrane electrode to mercury (11) was developed. The PVC membrane was deposited dropwise directly into a composite graphite- epoxy support. The sensor exhibits a Twice Nernstian response for both pH: The experimental slope at pH = 7.0 was 59.15 +/- 1.38 mV per decade and the experimental slope at pH = 4 was 29.66 mV per decade. The ISE minimum lifetime is 10 weeks, with a response time of 27 s. The ISE showed a good selectivity for mercury, The selectivity coefficients Kpot were obtained by four method. Only one interference for Ag+ was found MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Hidalgo PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0001-9704 UR - ISI:000180767600013 L2 - ion-selective electrode (ISE);mercury selective electrode;1-furoyl-3-ciclohexylthiourea as ionophore;NEUTRAL CARRIER; LIQUID-MEMBRANE; SENSORS; COEFFICIENTS; CHLORIDE; TIME SO - Afinidad 2002 ;59(501):581-585 6435 UI - 11355 AU - Perez-Martinez X AU - Funes S AU - Tolkunova E AU - Davidson E AU - King MP AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoThomas Jefferson Univ, Dept Mol Pharmacol & Biochem, BLSB 308, Philadelphia, PA 19107, USAGonzalez-Halphen, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-243, Mexico City 04510, DF, Mexico TI - Structure of nuclear-localized cox3 genes in Chlamydomonas reinhardtii and in its colorless close relative Polytomella sp AB - Several chlorophyte algae do not have the cox gene, encoding subunit III of cytochrome c oxidase, in their mitochondrial genomes. The cox3 gene is nuclear-encoded in the photosynthetic alga Chlamydomonas reinhardtii and in the colorless alga Polytomella sp. In this work. the genomic sequences of the cox3 genes of these two closely related algae are reported. The cox3 genes of both C. reinhardtii and Polytomella sp. contain four introns in the region encoding the putative mitochondrial-targeting sequences. These four introns show low sequence identities, but their locations are conserved between these species. The cox3 gene of C. reinhardtii has five additional introns in the region encoding the mature subunit III of cytochrome e oxidase. Sequence analysis of intron 6 of the cox3 gene of C. reinhardtii revealed similarity with two sequence elements present in introns of several other nuclear genes from this green alga. In the majority of the genes. these conserved sequences are located either near the 3' end or near the 5' end of the introns. Based on these data, we propose that the colorless genus Polytomella separated from C. reinhardtii after the cox3 gene was transferred to the nucleus' The data also support the evolutionary hypothesis of a recent acquisition of introns in C. reinhardtii MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0172-8083 UR - ISI:000175208500006 L2 - Chlamydomonas reinhardtii;cytochrome c oxidase;mitochondrial-targeting signals;Polytomella sp.;CYTOCHROME-C-OXIDASE; MITOCHONDRIAL GENOME; APOCYTOCHROME-B; PHYLOGENETIC ANALYSIS; COMPLETE SEQUENCE; SACCHAROMYCES-CEREVISIAE; ALGA POLYTOMELLA; SUBUNIT; INTRONS; DNA SO - Current Genetics 2002 ;40(6):399-404 6436 UI - 10123 AU - Perez-Tello M AU - Tirado-Ochoa JA AU - Sohn HY AU - Sanchez-Corrales VM AD - Univ Sonora, Dept Chem Engn & Met, Hermosillo 83000, Sonora, MexicoUniv Utah, Dept Met Engn, Salt Lake City, UT 84112, USAPerez-Tello, M, Univ Sonora, Dept Chem Engn & Met, Blvd Luis Encinas & Rosales, Hermosillo 83000, Sonora, Mexico TI - Size distribution analysis for copper matte particles oxidized under flash-converting conditions AB - Mathematical correlations were developed to represent the size distributions of high-grade (72%) copper matte particles oxidized underflash-converting conditions in a large laboratory. furnace. The correlation parameters for the oxidized particles were expressed as functions of the operating conditions in the furnace, namely, the mean size of the feed material and the oxygen-to-matte ratio. The statistical correlation parameter r(2) obtained with the mathematical expressions averaged 0.95 for the feed particles and 0.99 for the oxidized particles. The mathematical correlations were used to compute the amount of dust generated during the experimental runs. Good agreement between the correlated values and the experimental data was obtained. The potential application of the mathematical correlations for an industrial operation is discussed MH - Mexico|Sonora MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 1047-4838 UR - ISI:000178512500005 L2 - FURNACE SHAFT; MORPHOLOGY; MINERALOGY; MODEL SO - Jom-Journal of the Minerals Metals & Materials Society 2002 ;54(10):27-30 6437 UI - 10072 AU - Perez-Velazquez M AU - Lawrence AL AU - Gatlin DM AU - Gonzalez-Felix ML AU - Bray WA AD - Univ Sonora, Dept Invest Cient & Tecnol, Hermosillo 83000, Sonora, MexicoTexas A&M Univ Syst, TAES Shrimp Mariculture Project, Port Aransas, TX 78373, USATexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAPerez-Velazquez, M, Univ Sonora, Dept Invest Cient & Tecnol, Rosales & Ninos Heroes S-N AP 1819, Hermosillo 83000, Sonora, Mexico TI - Replacement of fresh dietary components by a dry feed for successful maturation of male Litopenaeus vannamei (Boone) broodstock MH - Mexico|Sonora MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000178608700010 L2 - diet;Litopenaeus vannamei;reproductive quality;sperm;REPRODUCTION; CAPTIVITY SO - Aquaculture Research 2002 ;33(13):1091-1095 6438 UI - 11666 AU - Perez-Villasenor F AU - Iglesias-Silva GA AU - Hall KR AD - Inst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, Mexico TI - Osmotic and activity coefficients using a modified Pitzer equation for strong electrolytes 1 : 1 and 1 : 2 at 298.15 K AB - We have correlated simultaneously experimental data for osmotic and activity coefficients of strong electrolyte solutions using the Pitzer equation and a modification of it. The optimal value for the Pitzer b parameter is different from the traditional value of 1.2 when using higher concentrations in its determination. An analysis of the equation shows that it is possible to reduce the model to a three-parameter form that represents the coefficients at molalities as high as 25 with better accuracy than the model as proposed by Pitzer MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000174114200015 L2 - EXCESS GIBBS ENERGY; AQUEOUS-SOLUTIONS; THERMODYNAMICS; MODEL SO - Industrial & Engineering Chemistry Research 2002 ;41(5):1031-1037 6439 UI - 11800 AU - Perez N AU - Gutierrez R AU - Noa M AU - Diaz G AU - Luna H AU - Escobar I AU - Munive Z AD - Univ Autonoma Metropolitana, Dept Prod Agr & Anim, Mexico City, DF, MexicoCtr Nacl Sanidad Agropecuaria, Havana, CubaUniv Autonoma Metropolitana, Dept Sistemas Biol, Mexico City, DF, MexicoPerez, N, Univ Autonoma Metropolitana, Dept Prod Agr & Anim, Mexico City, DF, Mexico TI - Liquid chromatographic determination of multiple sulfonamides, nitrofurans, and chloramphenicol residues in pasteurized milk AB - A rapid and selective liquid chromatographic method was developed to detect 6 sulfonamides, 3 nitrofurans, and chloramphenicol residues in pasteurized milk. The 10 drugs were extracted with chloroform-acetone and the organic phase was evaporated; the residues were dissolved in an aqueous sodium acetate buffer solution 0.02M (pH = 4.8), and the fat was removed by washing with hexane. The aqueous layer was collected, filtered, and injected. The 6 sulfonamides and chloramphenicol were detected at 275 nm ultraviolet (UV) using a gradient system starting with sodium acetate buffer solution-acetonitrile (95 + 5) and finishing with sodium acetate buffer solution-acetonitrile (80 + 20). Nitrofurans were detected at 375 nm (UV) isocratically with sodium acetate buffer solution-acetonitrile (80 + 20). For 50 ppb fortified milk, the average recoveries were (sulfathiazole) 65.52%; (sulfamerazine) 75.36%; (sulfamethazine) 93.94%; (sulfachlorpyridazine) 75.94%; (sulfamethoxazole) 85.18%; (sulfamonomethoxine) 83.45%; (chloramphenicol) 104.17%; (nitrofurazone) 91.81%; (furazolidone) 100.76%; and (furaltadone) 72.38%. Method detection limits ranged from 4 ppb (nitrofurazone) to 16 ppb (sulfamethazine). Some matrix interferences (3-7 ppb) were observed only with sulfonamides MH - Cuba MH - Mexico|Distrito Federal PB - GAITHERSBURG: AOAC INTERNATIONAL RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Analytical;Food Science & Technology U5 - J;Article AV - English IS - 1060-3271 UR - ISI:000173893000004 L2 - BOVINE-MILK SO - Journal of Aoac International 2002 ;85(1):20-24 6440 UI - 10496 AU - Perry E AU - Velazquez-Oliman G AU - Marin L AD - No Illinois Univ, Dept Geol & Environm Geosci, De Kalb, IL 60115, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoPerry, E, No Illinois Univ, Dept Geol & Environm Geosci, De Kalb, IL 60115 USA TI - The hydrogeochemistry of the karst aquifer system of the northern Yucatan Peninsula, Mexico AB - Based on groundwater geochemistry, stratigraphy, and surficial and tectonic characteristics, the northern Yucatan Peninsula, Mexico, a possible analog for ancient carbonate platforms, is divided into six hydrogeochemical/physiographic regions: (1) Chicxulub Sedimentary Basin, a Tertiary basin within the Chicxulub impact crater; (2) Cenote Ring, a semicircular region of sinkholes; (3) Pockmarked Terrain, a region of mature karst; (4) Ticul fault zone; (5) Holbox Fracture Zone-Xel-Ha Zone; and (6) Evaporite Region. Regional characteristics result from tectonics, rock type, and patterns of sedimentation, erosion, and rainfall. The Cenote Ring, characterized by high groundwater flow, outlines the Chicxulub Basin. Most groundwater approaches saturation in calcite and dolomite but is undersaturated in gypsum. Important groundwater parameters are: SO4/Cl ratios related to seawater mixing and sulfate dissolution; Sr correlation with SO4, and saturation of Lake Chichancanab water with celestite. indicating celestite as a major source of Sr; high Sr in deep water of cenotes, indicating deep circulation and contact of groundwater with evaporite; and correlation of Ca, Mg, and SO4, probably related to gypsum dissolution and dedolomitization. Based on geochemistry we propose: (1) a fault between Lake Chichancanab and Cenote Azul; (2) deep seaward movement of groundwater near Cenote Azul; and (3) contribution of evaporite dissolution to karst development in the Pockmarked Terrain. Chemical erosion by mixing-zone dissolution is important in formation of Estuario Celestun and other estuaries, but is perhaps inhibited at Lake Bacalar where groundwater dissolves gypsum, is high in Ca, low in CO3, and does not become undersaturated in calcite when mixed with seawater MH - USA MH - Mexico|Distrito Federal PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 9 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000177336200001 L2 - CHICXULUB IMPACT CRATER; GROUNDWATER DISCHARGE; COASTAL YUCATAN; MIXING ZONE; DISSOLUTION; CENOTES; BASIN; SIZE; SEA; LIMESTONE SO - International Geology Review 2002 ;44(3):191-221 6441 UI - 9767 AU - Persi P AU - Polcaro VF AU - Tapia M AU - Bohigas J AD - Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, ItalyUNAM, Inst Astron, Ensenada 22830, Baja California, MexicoPersi, P, Ist Astrofis Spaziale & Fis Cosm, Via Fosso Cavaliere 100, I-00133 Rome, Italy TI - Young stellar objects in Gy 2-18 (IRAS 05439+3035) AB - We present the results of optical and near-IR spectra and mid-infrared images of the star forming region Gy 2-18, which is associated with IRAS 05439+3035. Within this region, there is a star with strong Halpha emission that is illuminating an optical reflection nebula. Optical and near-IR spectra indicate that this star, named IRS 11, is a possible Herbig Be star of spectral type BO-B2, with a strong stellar wind and an infrared excess probably originating in a circumstellar dust disk. The mid-infrared images at 8.7, 9.7, and 12.5 mum show the presence of a second very red source, IRS 9, deeply embedded in the cloud and with a remarkably strong silicate feature in absorption. The estimated bolometric luminosity of 8.6 x 10(3) L-. and the infrared spectral index alpha(IR) = 1.9 suggest that IRS 9 is a massive protostellar object. These two sources form the core of the young stellar cluster associated with Gy 2-18. The infrared luminosity and spectral index of another member, IRS 13, are estimated to be less than or equal to165 L-. and less than or equal to0.44 MH - Italy MH - Mexico|Baja California PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000179361700030 L2 - stars : emission-line, Be;stars : formation;stars : pre-main-sequence;HERBIG AE/BE STARS; INFRARED-SPECTROSCOPY; EMISSION; DUST; PHOTOMETRY; FEATURES; SPECTRA; LINES; DISKS SO - Astronomical Journal 2002 ;124(6):3379-3386 6442 UI - 9245 AU - Pestana JM AU - Sancio RB AU - Bray JD AU - Romo MP AU - Mendoza MJ AU - Moss RES AU - Mayoral JM AU - Seed RB AD - Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Engn, Mexico City 04510, DF, MexicoPestana, JM, Univ Calif Berkeley, Dept Civil & Environm Engn, 440 Davis Hall, Berkeley, CA 94720 USA TI - Geotechnical engineering aspects of the June 1999 Central Mexico earthquakes AB - An earthquake of moment magnitude (M-W) 7.0 struck the central region of Mexico on 15 June 1999 between the states of Puebla and Oaxaca. A second event with a moment magnitude 6.3 occurred on June 21, also affecting the central region of Mexico but with minor consequences. Attenuation relationships of peak ground acceleration with hypocentral distance for the June 15th event were compared with strong-motion recordings over a variety of geologic site conditions. Significant site amplification was observed and was correlated with deep soil conditions. The June 15th event caused significant damage of unreinforced masonry structures, such as churches and houses, including more than 500 historical buildings. Puebla City and the towns of Tehuacan and Acatlan de Osorio were the urban areas hardest hit by the earthquake. Although the earthquake was felt in Mexico City, the damage was light and mostly restricted to nonstructural elements. Comparison with observations obtained during the September 1985 earthquake suggest that significant soil nonlinearity, resulting in increased amplification at larger periods, can be observed for soft soil sites MH - USA MH - Mexico|Distrito Federal PB - OAKLAND: EARTHQUAKE ENGINEERING RESEARCH INSTITUTE RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Civil;Engineering, Geological U5 - J;Article AV - English IS - 8755-2930 UR - ISI:000180828000005 SO - Earthquake Spectra 2002 ;18(3):481-499 6443 UI - 9745 AU - Pestryakov AN AU - Lunin VV AU - Kharlanov AN AU - Kochubey DI AU - Bogdanchikova N AU - Stakheev AY AD - Tomsk Polytech Univ, Dept Organ Chem, Tomsk 634034, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaBoreskov Inst Catalysis, Novosibirsk 630090, RussiaCtr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoInst Organ Chem, Moscow 119899, RussiaPestryakov, AN, Tomsk Polytech Univ, Dept Organ Chem, Lenin Ave 30, Tomsk 634034, Russia TI - Influence of modifying additives on electronic state of supported gold AB - Using the methods of IR spectroscopy of adsorbed CO, electron spectroscopy of diffuse reflectance, XRD, XPS, EXAFS and electron microscopy the influence of modifying additions of Ce, Zr, La and Cs oxides on the surface electronic states of supported gold have been studied. The additions of Ce and Zr oxides stabilize the ionic states of supported gold and increase the effective charge of the ions. In contrast, La and Cs oxides lower the effective charge of gold cation and favor their fast reduction. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000179486200015 L2 - gold catalysts;electronic states;IR spectroscopy;UV-visible spectroscopy;GAS SHIFT REACTION; CARBON-MONOXIDE; AU/ALPHA-FE2O3 CATALYST; SELECTIVE OXIDATION; SILVER CATALYSTS; CO OXIDATION; SURFACE; OXIDES; TEMPERATURE; METHANOL SO - Journal of Molecular Structure 2002 ;642(1-3):129-136 6444 UI - 11642 AU - Pestryakov AN AU - Lunin VV AU - Devochkin AN AU - Petrov LA AU - Bogdanchikova NE AU - Petranovskii VP AD - Tomsk State Univ Civil Engn, Tomsk 634003, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaInst Organ Chem, Ekaterinburg 620027, RussiaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoPestryakov, AN, Tomsk State Univ Civil Engn, Tomsk 634003, Russia TI - Selective oxidation of alcohols over foam-metal catalysts AB - Catalysts based on the foam metals (silver and copper) were studied in the processes of partial oxidation of methanol, ethanol and ethylene glycol. The experiments showed that the foam catalysts have high gas permeability, mechanical strength, thermostability and catalytic properties exceeding the ones of the traditional crystal and granular metal catalysts. Electronic states of silver and copper on the surface of the catalysts were studied by the method of diffuse reflectance electron spectroscopy in UV-VIS range. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000174265400012 L2 - silver;copper;catalysts;foam metals;alcohol oxidation;DIFFUSE-REFLECTANCE; METHANOL OXIDATION; SILVER CATALYSTS; DEEP OXIDATION; STATE; HYDROCARBONS SO - Applied Catalysis A-General 2002 ;227(1-2):125-130 6445 UI - 10114 AU - Peter WLS AU - Obrador G AU - Roberts TL AU - Collins AJ AD - Minneapolis Med Res Fdn Inc, United States Renal Data Syst, Minneapolis, MN, USAUniv Minnesota, Minneapolis, MN 55455, USATufts Univ New England Med Ctr, Boston, MA 02111, USAPan Amer Univ, Sch Med, Mexico City, DF, Mexico TI - Trends in intravenous iron use in dialysis patients in the United States MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757501086 SO - Journal of the American Society of Nephrology 2002 ;13():221A-222A 6446 UI - 10898 AU - Peterson AT AU - Sanchez-Cordero V AU - Ben Beard C AU - Ramsey JM AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoCtr Dis Control & Prevent, Atlanta, GA, USACISEI, Cuernavaca, Morelos, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USA TI - Ecologic niche modeling and potential reservoirs for Chagas disease, Mexico AB - Ecologic niche modeling may improve our understanding of epidemiologically relevant vector and parasite-reservoir distributions. We used this tool to identify host relationships of Triatoma species implicated in transmission of Chagas disease. Associations have been documented between the protracta complex (Triatoma: Triatominae: Reduviidae) with packrat species (Neotoma spp.), providing an excellent case study for the broader challenge of developing hypotheses of association. Species pairs that were identified coincided exactly with those in previous studies, suggesting that local interactions between Triatoma and Neotoma species and subspecies have implications at a geographic level. Nothing is known about sylvatic associates of T. barberi, which are considered the primary Chagas vector in Mexico; its geographic distribution coincided closely with that of N. mexicana, suggesting interaction. The presence of this species was confirmed in two regions where it had been predicted but not previously collected. This approach may help in identifying Chagas disease risk areas, planning vector-control strategies, and exploring parasite-reservoir associations for other emerging diseases MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 33 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000176394200004 L2 - GEOGRAPHIC DISTRIBUTIONS; TRIATOMINAE; PREDICTION; OAXACA SO - Emerging Infectious Diseases 2002 ;8(7):662-667 6447 UI - 11498 AU - Peterson AT AU - Ortega-Huerta MA AU - Bartley J AU - Sanchez-Cordero V AU - Soberon J AU - Buddemeier RH AU - Stockwell DRB AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Dept Geog, Lawrence, KS 66045, USAUniv Kansas, Kansas Appl Remote Sensing Program, Lawrence, KS 66045, USAUniv Kansas, Kansas Geol Survey, Lawrence, KS 66045, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Calif San Diego, San Diego Supercomp Ctr, La Jolla, CA 92093, USAPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USA TI - Future projections for Mexican faunas under global climate change scenarios AB - Global climates are changing rapidly, with unexpected consequences(1). Because elements of biodiversity respond intimately to climate as an important driving force of distributional limitation(2), distributional shifts and biodiversity losses are expected(3,4). Nevertheless, in spite of modelling efforts focused on single species(2) or entire ecosystems(5), a few preliminary surveys of fauna-wide effects(6,7), and evidence of climate change-mediated shifts in several species(8,9), the likely effects of climate change on species' distributions remain little known, and fauna-wide or community-level effects are almost completely unexplored(6). Here, using a genetic algorithm and museum specimen occurrence data, we develop ecological niche models for 1,870 species occurring in Mexico and project them onto two climate surfaces modelled for 2055. Although extinctions and drastic range reductions are predicted to be relatively few, species turnover in some local communities is predicted to be high (> 40% of species), suggesting that severe ecological perturbations may result MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 168 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000174901900041 L2 - SPECIES RANGE; BIODIVERSITY; NICHES SO - Nature 2002 ;416(6881):626-629 6448 UI - 9633 AU - Peterson BM AU - Berlind P AU - Bertram R AU - Bischoff K AU - Bochkarev NG AU - Borisov N AU - Burenkov AN AU - Calkins M AU - Carrasco L AU - Chavushyan VH AU - Chornock R AU - Dietrich M AU - Doroshenko VT AU - Ezhkova OV AU - Filippenko AV AU - Gilbert AM AU - Huchra JP AU - Kollatschny W AU - Leonard DC AU - Li W AU - Lyuty VM AU - Malkov YF AU - Matheson T AU - Merkulova NI AU - Mikhailov VP AU - Modjaz M AU - Onken CA AU - Pogge RW AU - Pronik VI AU - Qian B AU - Romano P AU - Sergeev SG AU - Sergeeva EA AU - Shapovalova AI AU - Spiridonova OI AU - Tao J AU - Tokarz S AU - Valdes JR AU - Vlasiuk VV AU - Wagner RM AU - Wilkes BJ AD - Univ Arizona, Steward Observ, Tucson, AZ 85721, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAUniv Sternwarte Gottingen, D-37083 Gottingen, GermanyMoscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, RussiaRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAUniv Florida, Dept Astron, Gainesville, FL 32611, USASternberg Astron Inst, Crimean Lab, UA-98409 Crimea, UkraineUzbek Acad Sci, Ulugbek Astron Inst, Tashkent 700052, UzbekistanCrimean Astrophys Observ, UA-98409 Crimea, UkraineShanghai Astron Observ, Shanghai 200030, Peoples R ChinaPeterson, BM, Univ Arizona, Steward Observ, Tucson, AZ 85721, USA TI - Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XVI. A 13 year study of spectral variability in NGC 5548 AB - We present the final installment of an intensive 13 year study of variations of the optical continuum and broad Hbeta emission line in the Seyfert 1 galaxy NGC 5548. The database consists of 1530 optical continuum measurements and 1248 Hbeta measurements. The Hbeta variations follow the continuum variations closely, with a typical time delay of about 20 days. However, a year-by-year analysis shows that the magnitude of emission-line time delay is correlated with the mean continuum flux. We argue that the data are consistent with the simple model prediction between the size of the broad-line region and the ionizing luminosity, rproportional toL(ion)(1/2). Moreover, the apparently linear nature of the correlation between the Hbeta response time and the nonstellar optical continuum F-opt arises as a consequence of the changing shape of the continuum as it varies, specifically F(opt)proportional toF(UV)(0.56). MH - Germany MH - Mexico|Puebla MH - Peoples R China MH - Russia MH - Ukraine MH - USA MH - Uzbekistan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 33 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179681500013 L2 - galaxies : active;galaxies : individual (NGC 5548);galaxies : nuclei;galaxies : Seyfert;OPTICAL WAVELENGTHS; SEYFERT-GALAXIES; NGC-5548; EMISSION; CONTINUUM; QUASARS; LUMINOSITY; ACCURACY SO - Astrophysical Journal 2002 ;581(1):197-204 6449 UI - 10255 AU - Peterson WT AU - Gomez-Guteirrez J AU - Morgan CA AD - Oregon State Univ, Hatfield Marine Sci Ctr, NOAA, NMFS, Newport, OR 97365, USACtr Interdisciplinario Ciencias Marinas, Dept Plancton & Ecol Marina, La Paz 23000, Baja California, MexicoOregon State Univ, Hatfield Marine Sci Ctr, Cooperat Inst Marine Resources Studies, Newport, OR 97365, USAPeterson, WT, Oregon State Univ, Hatfield Marine Sci Ctr, NOAA, NMFS, 2030 S Marine Sci Dr, Newport, OR 97365 USA TI - Cross-shelf variation in calanoid copepod production during summer 1996 off the Oregon coast, USA AB - The fecundity of nine species of adult female calanoid copepods, and molting rates for copepodite stages of Calanus marshallae were measured in 24 h shipboard incubations from samples taken during the upwelling season off the Oregon coast. Hydrographic and chlorophyll measurements were made at approximately 300 stations, and living zooplankton were collected at 36 stations on the continental shelf (< 150 m depth) and 37 stations offshore of the shelf (> 150 m depth) for experimental work. In our experiments, maximum egg production rates (EPR) were observed only for Calanus pacificus and Pseudocalanus mimus, 65.7 and 3.9 eggs fem(-1) day(-1) respectively, about 95% of the maximum rates known from published laboratory observations. EPR of all other copepod species (e.g., C. marshallae, Acartia longiremis and Eucalanus californicus) ranged from 3% to 65% of maximum published rates. Fecundity was not significantly related to body weight or temperature, but was significantly correlated with chlorophyll a concentration for all species except Paracalanus parvus and A. longiremis. Copepod biomass and production in on-shelf waters was dominated by female P. mimus and C. marshallae, accounting for 93% of the adult biomass (3.1 in C m(-3)) and 81% of the adult production (0.19 mg C m(-3) day(-1)). Biomass in the off-shelf environment was dominated by female E. californicus, P. mimus, and C. pacificus, accounting for 95% of the adult biomass (2.2 mg C m(-3)) and 95% of the adult production (0.08 mg C m(-3) day(-1)). Copepodite (C1-C5) production was estimated to be 2.1 mg C m(-3) day 1 (on-shelf waters) and 1.2 mg C m(-3) day(-1) (off-shelf water). Total adult + juvenile production averaged 2.3 mg C m(-3) day(-1) (on-shelf waters) and 1.3 mg C m(-3) day(-1) (off-shelf waters). We compared our measured female weight-specific growth rates to those predicted from the empirical models of copepod growth rates of Huntley and Lopez [Am Nat (1992) 140:201-242] and Hirst and Lampitt [Mar Biol (1998) 132:247-257]. Most of our measured values were lower than those predicted from the equation of Huntley and Lopez. We found good agreement with Hirst and Lampitt for growth rates <0.10 day(-1) but found that their empirical equations underestimated growth at rates > 0.10 day(-1). The mismatch with Hirst and Lampitt resulted because some of our species were growing at maximum rates whereas their composite empirical equations predict "global" averages that do not represent maximum growth rates MH - Mexico|Baja California MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000177995900016 L2 - MARINE PLANKTONIC COPEPODS; BENGUELA UPWELLING SYSTEM; ZOOPLANKTON GROWTH-RATES; WEIGHT-SPECIFIC GROWTH; EGG-PRODUCTION RATES; LABORATORY OBSERVATIONS; POPULATION-DYNAMICS; PSEUDOCALANUS SP; EMPIRICAL-MODEL; ENGLISH-CHANNEL SO - Marine Biology 2002 ;141(2):353-365 6450 UI - 8873 AU - Petranovskii V AU - Marzke RF AU - Diaz G AU - Gomez A AU - Bogdanchikova N AU - Fuentes S AU - Katada N AU - Pestryakov A AU - Gurin V AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoArizona State Univ, Tempe, AZ 85287, USAUNAM, Inst Fis, Mexico City 01000, DF, MexicoTottori Univ, Dept Mat Sci, Tottori 6808552, JapanTomsk State Univ Civil Engn, Tomsk 634003, RussiaBSU, Physicochem Res Inst, Minsk 220080, ByelarusPetranovskii, V, UNAM, Ctr Ciencias Mat Condensada, Apdo Postal 2681, Ensenada 22800, Baja California, Mexico TI - Characterization of H and Cu mordenites with varying SiO2/Al2O3 ratios, by optical spectroscopy, MAS NMR of Si-29, Al-27 and H-1, temperature programmed desorption and catalytic activity for nitrogen oxide reduction AB - H-mordenites (HMor) with variable SiO2/Al2O3 molar ratio (MR) varying from 10 to 206 were incorporated with copper (CuMor). Maximum total acidity and maximum concentration of the strongest acid sites were found for MR=15 (HMor15). This sample has the lowest micropore and mesopore content, but also show strongly disordered Si sites in the crystalline lattice. A consistent finding has been the disappearance of the NMR line from extra-framework Al-27, whenever Cu is present. The reducibility of copper ions and stability of reduced species depend on MR. The MR also influences optical lineshapes from different reduced species of Cu. A plasmon resonance band at 580 nm, due to small Cu particles formed in the zeolite, occurs at low and high MR but not at MR=15. Catalytic tests of NO conversion reveal that the reduced Cu-mordenites with MR=15 are the most stable and active ones MH - Byelarus MH - Japan MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000181696400102 L2 - SILVER CLUSTERS; ZEOLITE; NO; STABILITY SO - Impact of Zeolites and Other Porous Materials on the New Technologies at the Beginning of the New Millennium, Pts A and B 2002 ;142():815-822 6451 UI - 9218 AU - Petranovskii V AU - Gurin V AU - Bogdanchikova N AU - Hernandez MA AU - Avalos M AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoBSU, Physicochem Res Inst, Minsk, ByelarusUniv Autonoma Puebla, Inst Sci, Puebla 72570, MexicoPetranovskii, V, UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - A selectivity of zeolite matrices in the Cu(II) reduction process AB - Copper nanoparticles were produced within a series of protonated and alkaline metal forms of zeolites (mordenite, erionite and clinoptilolite) by the hydrogen reduction of corresponding Cu(II)-exchanged forms. Variation of the zeolite structure, the reduction temperature and the acidity of zeolites (regulated via cation types and in the case of mordenite via Si/Al ratio from 5 to 103) are the main factors influencing the appearance of copper reduced forms. They were detected by means of optical absorption using Diffuse Reflectance Spectroscopy (DRS) technique as the plasmon resonance band of different shape and position and simulated with the Mie theory for the simple model of spherical copper particles embedded in a dielectric medium. The observed effects are interpreted as a difference in the acidity strength and type of matrix playing a role of medium for the reduction process. The acidity control and zeolite type structure are proposed as the main tools for selectivity of copper reduction and its final state MH - Byelarus MH - Mexico|Baja California MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000180926800071 L2 - ION-EXCHANGED MORDENITE; COPPER-ACTIVE-SITES; OPTICAL-PROPERTIES; SILVER CLUSTERS; METAL-CLUSTERS; PARTICLES; SPECTROSCOPIES; STABILIZATION; ABSORPTION; CATALYSTS SO - Nanoporous Materials Iii 2002 ;141():561-568 6452 UI - 10878 AU - Petranovskii V AU - Gurin V AU - Bogdanchikova N AU - Licea-Claverie A AU - Sugi Y AU - Stoyanov E AD - UNAM, CCMC, Ensenada 22800, Baja California, MexicoBelarussian State Univ, Physicochem Res Inst, Minsk 220080, ByelarusInst Tecnol Tijuana, Grad Ctr, Tijuana, Baja California, MexicoGifu Univ, Gifu 50511, JapanInst Catalysis, Novosibirsk 680005, RussiaPetranovskii, V, UNAM, Ctr Ciencias Mat Cond, POB 439036, San Ysidro, CA 92143 USA TI - The effect of SiO2/Al2O3 molar ratio in mordenite upon the optical appearance of reduced copper AB - A series of protonated copper-containing mordenites with variable SiO2/Al2O3 molar ratio (MR) in the range 10 less than or equal to MR less than or equal to 206 was prepared by ion exchange in copper nitrate aqueous solution. The reduction of copper ions incorporated into the mordenites by hydrogen was shown to lead to different reduced copper species including small metallic particles inter alia. The optical appearance of the copper particles depends strongly on the value of MR, however, in a non-monotonic manner in line with the variation of acidity of this series of mordenites. Copper particles formation in the mordenite with MR = 15 is almost non-existent, while an efficient reduction proceeds for MR = 10 and 20 less than or equal to MR less than or equal to 206. The optical appearance of copper particles is different and consists of a contribution of the pronounced plasmon resonance maximum at 550-600 nm for MR = 10 and MR = 206, while for MR = 20 and MR = 31, it has the shape of shoulder in the same range. These features are simulated using Mie theory, taking into account the size-dependence of the imaginary part of the dielectric constant and the properties of the host medium. The differences in size and particle localization are considered as the main reasons for the difference of the optical features in the visible range. (C) 2002 Elsevier Science B.V. All rights reserved MH - Byelarus MH - USA MH - Japan MH - Mexico|Baja California MH - Russia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 12 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000176260800025 L2 - mordenite;SiO2/Al2O3 molar ratio;copper;small metal particles;optical absorption;plasmon resonance;SILVER CLUSTERS; ELECTRON DYNAMICS; COLLOIDAL PARTICLES; METALLIC PARTICLES; AQUEOUS-SOLUTIONS; REVERSE MICELLES; ION-IMPLANTATION; SIO2 COATINGS; NOX REDUCTION; FUSED-SILICA SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2002 ;332(1-2):174-183 6453 UI - 10931 AU - Petricevich VL AU - Pena CF AD - Inst Butantan, Lab Imunoquim, Sao Paulo, BrazilUNAM, Inst Biotechnol, Cuernavaca, Morelos, MexicoPetricevich, VL, Inst Butantan, Lab Imunoquim, Sao Paulo, Brazil TI - The dynamics of cytokine d nitric oxide secretion in mice injected with Tityus serrulatus scorpion venom AB - AIMS: The effects of Tityus serrulatus venom (TSV) were analysed with respect to the susceptibility of four isogenic mouse, the symptoms following injection of venom and the inflammatory mediators in an experimental model of severe envenomation induced in mice. Methods: The susceptibility was analysed by lethal dose (LD50) determination, including the symptoms observed during envenomating and glucose levels. The detection of cytokines in serum from mice were analysed using enzyme-linked immunosorbent assay, and nitric oxide (NO) was analysed using nitrite determination. Results: The estimated LD50 values were in micrograms per 100 microliters, and the susceptibility of mice to TSV varies with: (a) mouse strain and route of injection (A/J < BALB/c < C57Bl/6 = DBA); (b) mouse strain and sex (A/J female and male < BALB/c female and male); and (c) body weight (all groups of A/J < BALB/c groups). Among the mouse strains studied, BALB/c mice presented moderate sensibility to TSV, with changes in specific signs and serum levels of glucose, several cytokines and NO, when injected intraperitoneally (i.p.) with 1 LD50 of venom. Sweating, salivation and tremor were the specific signs that preceded death. The maximum levels of glucose in sera from mice injected i.p. with 1 LD50 of TSV were observed 60-90 min post-injection. Significant differences were observed in the time-course of cytokine levels, and the venom induced marked elevations of interleukin (IL)-1alpha, IL-1beta, IL-6, IL-10 and interferon gamma (IFN-gamma). The maximum levels of IL-1alpha and IL-1beta were observed 2 h post-injection. The more pronounced levels of IL-6 were observed 4 h post-injection. There was an early increase in IFN-gamma followed by an even higher level after 4 h. IL-10 levels peaked between 6 and 8 h, and this cytokine probably modulates the secretion of IFN-gamma. Tumor necrosis factor release was not detected in BALB/c mice injected with TSV. NO levels attained maximal release after 2 h, following venom injection, while a second peak for NO was at 6 h. Conclusions: These findings indicate that the susceptibility to the systemic effects of the venom varies among mice of different haplotypes, and that the cytokines such as IL-1, IL-6, IFN-gamma and NO are strongly involved in the pathogenesis caused by this venom and are correlated with the severity of envenomation MH - Brazil MH - Mexico|Morelos PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Cell Biology;Immunology U5 - J;Article AV - English IS - 0962-9351 UR - ISI:000176195600005 L2 - Tityus serrulatus venom;symptoms;cytokines;nitric oxide;TUMOR-NECROSIS-FACTOR; SEPTIC SHOCK; BOTHROPS-ASPER; SERUM; CELLS; INTERLEUKIN-10; EXPRESSION; SYNTHASE; MOUSE; INFLAMMATION SO - Mediators of Inflammation 2002 ;11(3):173-180 6454 UI - 9679 AU - Pfeiffer H AU - Bosch P AU - Bulbulian S AD - Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Nacl Invest Nucl, Dept Quim, Mexico City 11801, DF, MexicoPfeiffer, H, Univ Cambridge, Dept Mat Sci & Met, Pembroke St, Cambridge CB2 3QZ, England TI - Zr alkoxide chain effect on the sol-gel synthesis of lithium metazirconate AB - Lithium metazirconate (Li2ZrO3) was synthesized by the sol-gel method, using four different Zr alkoxides: zirconium ethoxide, zirconium iso-propoxide, zirconium propoxide and zirconium butoxide. The syntheses were made under two different catalytic regimes, acid and basic. The resulting powders were mixtures of Li2ZrO3 and ZrO2. The best yield of Li2ZrO3 (100%) was obtained when the sol-gel reaction was developed with lithium methoxide and zirconium ethoxide under acid catalysis regime. This study establishes that, for base-catalyzed reactions the ZrO2 formation decreases when the alkyl-chain increases in the alkoxides. By contrast, for acid-catalyzed reactions the ZrO2 formation increases as the alkyl-chain increases. Finally, when Zr propoxide and Zr iso-propoxide were used, the Li2ZrO3 amounts were different due to steric effects. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000179569300043 L2 - lithium zirconate;sol-gel;XRD;zirconium alkoxide;FUSION-REACTOR BLANKET SO - Materials Chemistry and Physics 2002 ;78(2):558-561 6455 UI - 10769 AU - Pfeiler E AU - Toyoda H AU - Williams MD AU - Nieman RA AD - Ctr Invest Alimentac & Desarrollo AC, Unidad Gurymas, Guaymas 85480, Sonora, MexicoArizona State Univ, Dept Biol, Tempe, AZ 85287, USAChiba Univ, Fac Pharmaceut Sci, Inage Ku, Chiba 2638522, JapanArizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287, USAPfeiler, E, Ctr Invest Alimentac & Desarrollo AC, Unidad Gurymas, Apartado Postal 284, Guaymas 85480, Sonora, Mexico TI - Identification, structural analysis and function of hyaluronan in developing fish larvae (leptocephali) AB - Hyaluronan (HA) has been identified as the principal glycosaminoglycan (GAG) in the highly hydrated, extracellular body matrix of the larval stage (leptocephalus) of seven species of true eels (Teleostei: Elopomorpha: Anguilliformes) and the ladyfish Elops saurus (Elopiformes), and was found as a minor GAG component in the bonefish Albula sp. (Albuliformes). Identification was based on: (1) HPLC separation of unsaturated disaccharides derived from chondroitinase ABC digests of whole-body GAG extracts; (2) H-1 NMR analyses of native GAG polymers; and (3) degradation of GAG extracts by Streptomyces hyaluronan lyase. The unsaturated disaccharide 2-acetamido-2-deoxy-3-0-(beta-D-gluco-4-enepyranosyluronic acid)-D-glucose (DeltaDi-HA) accounted for 92.4-99.8% of the total disaccharides in chondroitinase digests. Trace amounts of unsaturated disaccharides of chondroitin sulfate were also present. Two-dimensional gCOSY spectra of the native HA polymer were similar for all species. Proton assignments for the HA disaccharide repeat (GlcAbeta1-3GlcNAcbeta1-4) in D2O, based on gCOSY, DQF-COSY and TOCSY analyses for the eel Ahlia egmontis, were concordant with published chemical shifts for HA oligosaccharides. In addition to its presumed role in maintaining the structural integrity and hydration of the gelatinous body of the leptocephalus, HA is postulated to function as a storage polysaccharide in those species in which it is the predominant GAG. (C) 2002 Elsevier Science Inc. All rights reserved MH - Japan MH - Mexico|Sonora MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 1096-4959 UR - ISI:000176788200017 L2 - Elopomorpha;energetics;glycosaminoglycan;HPLC;hyaluronan;hyaluronan lyase;leptocephali;H-1 NMR;BONEFISH ALBULA; KERATAN SULFATE; GLYCOSAMINOGLYCAN COMPOSITION; ELOPOMORPH LEPTOCEPHALI; METAMORPHOSIS; NMR; OLIGOSACCHARIDES; DISACCHARIDES; PROTEINS; BINDING SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2002 ;132(2):443-451 6456 UI - 11764 AU - Pfeiler E AU - Colborn J AU - Douglas MR AU - Douglas ME AD - Ctr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Guaymas 85480, Sonora, MexicoArizona State Univ, Dept Biol, Tempe, AZ 85287, USAUniv Florida, Dept Fisheries & Aquat Sci, Gainesville, FL 32653, USAPfeiler, E, Ctr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Apartado Postal 284, Guaymas 85480, Sonora, Mexico TI - Systematic status of bonefishes (Albula spp.) from the eastern Pacific Ocean inferred from analyses of allozymes and mitochondrial DNA AB - Recent molecular evidence suggests that at least eight species of bonefishes (Albuliformes: Albulidae: Albula) are found worldwide (Colborn et al. 2001). Adults of most of these species, including two that are restricted to the eastern Pacific Ocean (Albula sp. A from the Gulf of California and Albula sp. C from the Gulf of Panama), have not been formally described. Because cryptic species of bonefishes are known to occur sympatrically, population genetics data provide an important tool for taxonomic studies on this group. Isozyme analyses conducted on larval, juvenile and adult bonefish from the Guaymas region of the central Gulf of California confirmed that only a single species (Albula sp. A) was present there. In addition, analysis of a segment of the cytochrome b gene from three adult Albula collected from coastal waters of southern California revealed high sequence homology with Albula sp. A, suggesting that the southern California specimens were conspecific with those from Guaymas. However, the southern distributional limit of Albula sp. A, and whether there are regions where Albula sp. A and C occur sympatrically, are unknown. The historical background of the available name Atopichthys esunculus Garman, 1899 [= Albula esuncula (Garman, 1899)], and problems associated with the nomenclature of the two species of eastern Pacific bonefishes, are summarized. The systematic status of the related shafted bonefish, Dixonina (= Albula) nemoptera Fowler, 1911, is also reviewed MH - Mexico|Sonora MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000173985800004 L2 - Albuliformes;Albulidae;cytochrome b;population genetics;speciation;GULF-OF-CALIFORNIA; GROWTH; POPULATIONS; SPECIATION; EVOLUTION; PROTEINS; FISHES; GENE; AGE SO - Environmental Biology of Fishes 2002 ;63(2):151-159 6457 UI - 11153 AU - Pianese CP AU - Hidalgo LOV AU - Gonzalez RH AU - Madrid CE AU - Ponce JEC AU - Ramirez AM AU - Moran LM AU - Arenas JEP AU - Rubio ATYG AU - Uribe JO AU - Abiuso J AU - Hanuch J AU - Alegria J AU - Volpi J AU - Flaskamp R AU - Sanjuan AP AU - Gomez JMG AU - Hernandez J AU - Pedraza A AU - Quijano D AU - Martinez C AU - Castaneda JR AU - Guerra SJC AU - Valencia GF AD - SSA, Inst Nacl Neurol & Neurocirug Dr Manuel Velasco S, Mexico City, DF, MexicoHosp Univ Jose E Gonzalez, Mexico City, DF, MexicoCtr Especialidades Med, Mexico City, DF, MexicoHosp Reg Dr Valentin Gomez Farias, ISSSTE, Mexico City, DF, MexicoBayer Mexico SA DE CV, Mexico City, DF, MexicoClin Alemana Santiago SA, Santiago, SA, ChileFdn Santa Fe Bogota, Santa Fe de Bogota, ColombiaHosp San Jose, Santa Fe de Bogota, ColombiaClin Medellin, Medellin, ColombiaHosp San Ignacio, Santa Fe de Bogota, ColombiaPianese, CP, Av Insurgentes Sur 3877,Col La Fama, Mexico City 14269, DF, Mexico TI - New approaches to the management of peripheral vertigo: Efficacy and safety of two calcium antagonists in a 12-week, multinational, double-blind study AB - Objective: To evaluate the efficacy and safety profile of one 30-mg nimodipine oral tablet taken three times per day (one tablet with breakfast, one with lunch, and one with dinner) or one 150-mg cinnarizine verum oral capsule taken once each day with dinner for 12 weeks. Study Design: Comparative in a double-blind, multinational pilot study. Setting: Tertiary referral center. Patients: A total of 221 patients met the study criteria; of that total, 181 adult patients completed the study, including 135 women and 46 men whose ages ranged from 20 to 80 years. Interventions: Two calcium antagonists were used to treat vertigo (nimodipine, 89 patients; cinnarizine, 92 patients), and all patients were maintained on the same dosage regimen until they completed 12 weeks of treatment. Patients were evaluated at 2- and 4-week intervals; an additional evaluation was made at Week 14 to determine vertigo recurrence in the post-treatment period. Main Outcome Measures: The response was evaluated by using the vertigo severity index, a count of vertigo episodes in a given time period. Each episode is weighted according to its intensity. Results: Nimodipine treatment decreased the incidence of moderate vertigo episodes by 78.8% and decreased severe vertigo episodes by 85.0%. Cinnarizine treatment decreased the incidence of moderate vertigo episodes by 65.8% and decreased severe vertigo episodes by 89.8%. Nimodipine and cinnarizine exhibited similar safety profiles. Only two patients withdrew from the study because of adverse events possibly related to the study drug. One patient withdrew from the cinnarizine group because of headache, and one patient withdrew from the nimodipine group because of lipothymia. Conclusion: These data confirm the marked efficacy of both nimodipine and cinnarizine in the treatment of vestibular vertigo MH - Chile MH - Colombia MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology;Otorhinolaryngology U5 - J;Article AV - English IS - 1531-7129 UR - ISI:000175417500023 L2 - calcium antagonist;electronystagmography;peripheral vertigo therapy;vestibular system SO - Otology & Neurotology 2002 ;23(3):357-363 6458 UI - 11849 AU - Pichel MG AU - Binsztein N AU - Qadri F AU - Giron JA AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Puebla, MexicoANLIS Carlos G Malbran, Inst Nacl Enfermedades Infecciosas, Buenos Aires, DF, ArgentinaInt Ctr Diarrhoeal Dis Res, Dhaka 1000, BangladeshGiron, JA, Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Ciencias Microbiol, Apartado Postal 1622, Puebla, Mexico TI - Type IV longus pilus of enterotoxigenic Escherichia coli: Occurrence and association with toxin types and colonization factors among strains isolated in Argentina AB - The longus type IV pilus structural gene (lngA) was sought among 217 clinical enterotoxigenic Escherichia coli (ETEC) strains isolated in Argentina. lngA was present in 20.7% of the isolates and was highly associated with ETEC producing heat-stable toxin and the most common colonization factors. The prevalence of longus among ETEC strains in Argentina was comparable to that of colonization factor antigen I (CFA/I), CFA/II, and CFA/IV in other regions of the world MH - Argentina MH - Bangladesh MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000173731900065 L2 - FACTOR ANTIGENS CFAS; MONOCLONAL-ANTIBODIES; PROSPECTIVE COHORT; DIARRHEA; CHILDREN; PREVALENCE; GENE; BANGLADESH; RESPONSES; VACCINES SO - Journal of Clinical Microbiology 2002 ;40(2):694-697 6459 UI - 11142 AU - Picos-Cardenas VJ AU - Meza-Espinoza JP AU - Gutierrez-Angulo M AU - Esparza-Flores MA AU - yala-Madrigal ML AU - Hansmann I AU - Gonzalez GJR AD - Inst Mexicano Seguro Social, Ctr Med Nacl Occidente, Ctr Invest Biomed Occidente, Div Genet, Guadalajara, Jalisco, MexicoInst Mexicano Seguro Social, Ctr Med Nacl Occidente, Hosp Pediat, Dept Hematol, Guadalajara, Jalisco, MexicoUniv Halle Wittenberg, Inst Humangenet & Med Biol, Halle Saale, Saale, GermanyGonzalez, GJR, Univ Guadalajara, CUCS, Dept Fisiol, Guadalajara 44430, Jalisco, Mexico TI - Paternal isodisomy 7q secondary to monosomy 7 at recurrence in a Down syndrome child with acute myelogenous leukemia AB - We report a boy with Down syndrome and leukemia who acquired uniparental isodisomy of chromosome 7q as a secondary chromosomal change during recurrence of the disease. His karyotype before therapy was 46,XY,der(1)t(1;1)(p36;q32).-7,+21c[17]/46,idem.del(9)(p22)[10], whereas at recurrence it was 46,XY,der(1)t(1;1)(p36:q32,-7,der(7)(qter-->p22similar topter::q 10-- qter),del(9)(p22),+21c[13]/47,XY,+21c[2]. By using polymerase chain reaction amplification of D7S493 and D7S527 markers, we identified the loss of the maternal chromosome 7 with a consequent paternal isodisomy in the clone with dup7q. This rearrangement could be implicated in the progression of the disease by causing (1) nullisomy for a gene or genes located on 7p22-->pter, (2) functional double doses of exclusively paternal expressed genes, and (3) restoration of the effects produced by haploinsufficiency of biparental expressed genes. (C) 2002 Elsevier Science Inc. All rights reserved MH - Germany MH - Mexico|Jalisco PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Genetics & Heredity U5 - J;Article AV - English IS - 0165-4608 UR - ISI:000175695600009 L2 - MYELODYSPLASTIC SYNDROME; ALLELIC LOSS; BREAST-CANCER; WILMS-TUMOR; CHROMOSOME-7; HETEROZYGOSITY; ARM SO - Cancer Genetics and Cytogenetics 2002 ;134(2):138-141 6460 UI - 10751 AU - Picquart M AU - Escobar-Alarcon L AU - Torres E AU - Lopez T AU - Haro-Poniatowski E AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoInst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoUniv La Habana, Fac Quim, IMRE, Havana 10400, CubaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoHaro-Poniatowski, E, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Structural study of lithium titanium mixed oxides prepared by sol-gel process AB - A structural study, using TGA-DSC analysis, X-ray diffraction, Raman scattering and FT Infrared absorption, is performed on mixed titanium lithium oxide with 20% of lithium prepared by sol-gel process. The structure is investigated as a function of the annealing temperature. At low temperatures the sample is in the anatase phase and transforms to the rutile phase near 500degreesC. The crystallite size of rutile TiO2 increases from 40 to 100 nm as the temperature increases. However the size increase presents some discontinuity at temperature around 600degreesC. At thermal treatment temperatures from 500degreesC to 850degreesC the presence of LiTi2O4 in the sample is clearly observed. Finally at 1000degreesC the sample is composed by a mixture of rutile TiO2 and Li2Ti3O7. (C) 2002 Kluwer Academic Publishers MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000176760800020 L2 - CATALYSTS; TIO2; SURFACE; PH; PHOTOCHEMISTRY; PARTICLES; PLATINUM; SPECTRA; RUTILE SO - Journal of Materials Science 2002 ;37(15):3241-3249 6461 UI - 10867 AU - Pimienta-Barrios E AU - Pimienta-Barrios E AU - Salas-Galvan ME AU - Zanudo-Hernandez J AU - Nobel PS AD - Univ Guadalajara, CUCBA, Dept Ecol, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, CUCBA, Dept Agr Prod, Guadalajara 44430, Jalisco, MexicoIPN, CINVESTAV, Dept Bioquim & Biotecnol Vegetal, Mexico City 07738, DF, MexicoUniv Calif Los Angeles, Dept Biol, OBEE, Los Angeles, CA 90095, USAPimienta-Barrios, E, Cerrada Maestranza 1098,Residencial Guadalupe Jar, Zapopan, Jalisco, Mexico TI - Growth and reproductive characteristics of the columnar cactus Stenocereus queretaroensis and their relationships with environmental factors and colonization by arbuscular mycorrhizae AB - Three natural populations of pitayo (Stenocereus queretaroensis (Weber) Buxbaum), a columnar arborescent cactus, were studied in their subtropical environments in western Mexico. All of the sites were characterized by shallow, nutrient-poor soils. Percentage of colonization by arbuscular mycorrhizae (AM) fungi, stem growth, fruit mass, and percentage germination were greater in S. queretaroensis at Autlan, Jalisco (AJ) than at Zacoalco de Torres, Jalisco (ZTJ) or Santa Rosa, Zacatecas (SRZ). The onset of root colonization by arbuscular mycorrhizae during the middle of the summer wet period preceded increases in stem extension rate and stem phosphorus concentration. Based on previous studies of effects of environmental factors on photosynthesis, climatic conditions were more favorable for photosynthesis at AJ than at SRZ and ZTJ, as indicated by the amount of summer rainfall, the amount of light, and the moderate air temperatures that prevailed during the fall and winter seasons. There was a significant positive correlation between stem growth and percentage of total root length colonized by arbuscules of AM fungi for S. queretaroensis at SRZ and AJ, but not at ZTJ. A negative significant correlation was observed between stem growth and maximal and minimal air temperatures at the three study sites. Stem growth was positively related to rainfall only at SRZ, and light was statistically related to stem growth only at ZTJ. Among sites, S. queretaroensis at AJ had the highest carbon gain and greatest AM colonization, creating physiological conditions that led to the highest stem growth, fruit mass and percentage of seed germination MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Forestry U5 - J;Article AV - English IS - 0829-318X UR - ISI:000176245400009 L2 - AM fungi;fruit;phosphorus;seed quality;subtropical environments;SEMIARID ENVIRONMENT; CO2 UPTAKE; FUNGI; PLANT; PHOSPHORUS; INFECTION; DESERT; NUTRITION; RESPONSES; CACTACEAE SO - Tree Physiology 2002 ;22(9):667-674 6462 UI - 12137 AU - Pimienta-Barrios E AU - Del Castillo-Aranda MEG AU - Nobel PS AD - Univ Guadalajara, Dept Ecol, Ctr Univ Ciencias Biol & Agropecuarias, Zapopan 45110, Jalisco, MexicoUniv Calif Los Angeles, Dept Organism Biol Ecol & Evolut, Los Angeles, CA 90095, USAPimienta-Barrios, E, Carrada de la Maeestranza 1098,Residencial Guadal, Zapopan Jalisco 45030, Mexico TI - Ecophysiology of a wild platyopuntia exposed to prolonged drought AB - The effects of reduced annual rainfall over a 7-year period on the daily patterns of gas exchange were analyzed for a wild platyopuntia (Opuntia robusta) growing in rocky soil. In spite of the prolonged water stress, stomata opened at night and net carbon gain was observed for eight 1-day sampling periods during 2000. Daily net CO2 uptake increased more than five-fold from the end of the dry spring season to the middle of the summer wet season. Curtailment in the formation of both new cladodes and new roots is considered to be an avoidance strategy to water scarcity, which in combination with net CO2 Uptake responses to temperature and relative humidity at night, and perhaps association with arbuscular-mycorrhizal fungi, were the most important adaptations for O. robusta to the prolonged drought conditions that prevailed in its rocky environment. Such adaptations of O. robusta are in addition to the classical physiological and structural modifications of CAM plants to tolerate prolonged drought. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Jalisco MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences;Environmental Sciences U5 - J;Article AV - English IS - 0098-8472 UR - ISI:000172897600007 L2 - CO2 uptake;drought;Opuntia robusta;rocky soil;OPUNTIA-FICUS-INDICA; CRASSULACEAN ACID METABOLISM; PITAYO STENOCEREUS-QUERETAROENSIS; ARBUSCULAR MYCORRHIZAL FUNGI; CO2 UPTAKE; WATER RELATIONS; SEMIARID ENVIRONMENT; DEVELOPING CLADODES; PEAR OPUNTIA; CACTUS SO - Environmental and Experimental Botany 2002 ;47(1):77-86 6463 UI - 10198 AU - Pincik E AU - Gleskova H AU - Mullerova J AU - Nadazdy V AU - Mraz S AU - Ortega L AU - Jergel M AU - Falcony C AU - Brunner R AU - Gmucova K AU - Zeman M AU - van Swaaij RACM AU - Kucera M AU - Jurani R AU - Zahoran M AD - Slovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaPrinceton Univ, Dept Elect Engn, Princeton, NJ 08544, USAPrinceton Univ, Dept Elect Engn, Mikulas, SlovakiaCNRS, Cristallog Lab, F-38042 Grenoble, FranceFPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoDelft Univ Technol, DIMES, Lab Elect Components Technol & Mat, NL-2600 GB Delft, NetherlandsSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaComenius Univ, Fac Math Phys & Informat, Bratislava, SlovakiaPincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84228, Slovakia TI - Properties of semiconductor surfaces covered with very thin insulating overlayers prepared by impacts of low-energy particles AB - This paper deals with the formation of very thin insulating layers on crystalline (GaAs) and amorphous semiconductors (a-Si:H and a-SiGe:H) prepared by the impacts of particles of a very low energy. Plasma, ion beams and plasma immersion ion implantation (PIII) as the sources of impacting particles were used and compared. The last technique was applied successfully for the first time in the case of amorphous silicon-based semiconductors. More diagnostics techniques were used for the investigation of the transformation of the semiconductor surface properties. In the a-Si:H based MOS structures prepared by PIII technology, only two groups of defects 0.82 and 1.25 eV (D-z and D-e, respectively) were found. We suppose that the PIII technology using the implantation at the sample voltage of similar to-1000V causes the formation of a-Si:H layers with missing group of D-h states. The only decisive parameter determining the formation of two groups of states is the negative potential of the sample during the implantation. In aSiGe:H based MOS structures, three distributions could be prepared by a bias annealing procedure: 0.47, 0.58 and 0.95 eV corresponding to p-type (D-h) intrinsic (D-z) and n-type (D-e) distributions, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Netherlands MH - Slovakia MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000178111100018 L2 - insulating layers;semiconductors;crystalline and amorphous substrates;MOS structures;DEFECT-POOL MODEL; AMORPHOUS-SILICON SO - Vacuum 2002 ;67(1):131-141 6464 UI - 8147 AU - Pineda C AU - Martinez JL AU - Nava A AU - Silveira LH AU - Bouffard A AD - Inst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoHenry Ford Hosp, Detroit, MI 48202, USA TI - The musculoskeletal complications of retained foreign bodies: A clinical-sonographic study MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800207 SO - Arthritis and Rheumatism 2002 ;46(9):S103-S103 6465 UI - 10946 AU - Pineda J AU - Lopez M AD - Woods Hole Oceanog Inst, Biol Dept MS34, Woods Hole, MA 02543, USACtr Invest Cient & Educ Super Ensenada, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoPineda, J, Woods Hole Oceanog Inst, Biol Dept MS34, Woods Hole, MA 02543 USA TI - Temperature, stratification and barnacle larval settlement in two Californian sites AB - Barnacle settlement was monitored in two sites 100km apart along the coast of Alta and Baja California. Ill five periods of Observations completed between 1991 and 1996, Chthamalus spp., Pollicipcs polymerus, and Balanus glandula settlement was consistently higher in the northern site, La Jolla (LJ), than ill the southern site, La Salina (LS). For Chthamalus, the most abundant settler, settlement was higher in LJ in 58 Out of 60 paired dates, by a mean factor of 141. In 1996, time series of temperature in about 15m of water showed that the stratification was 72% higher, on average, and that the thermocline was shallower in LJ than in LS. Spectra Of temperature showed that internal motions of tidal and higher frequencies were more energetic and closer to the surface in LJ compared to LS. In LJ changes in settlement were positively correlated with changes in stratification. These results suggest that high-frequency internal motions are important in the onshore transport of larvae. low-frequency cooling events recorded in LJ apparently caused the energetic semidiurnal temperature variability to migrate from the bottom towards the surface, leading to the surface manifestation of the internal tide and surface internal tidal bores, which indicates that the surface nearshore bores occur in response to the shallowing of the thermocline. Tidal and higher frequency internal motions were more energetic when the thermocline was shallow during the low-frequency cooling events, than when it was deep and relatively weak during ordinary conditions. The major cooling event in LJ correlated with the local wind, suggesting local wind-driven upwelling. Oil the other hand, correlation of LS temperature with LJ temperature, winds, and sea level suggest propagation from the South. These results suggest that the low-frequency drops in temperature that modulate the nearshore internal tidal bores Lire Caused by a combination of the local wind and events that propagate poleward, possibly as coastally trapped waves. (C) 2002 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Oceanography U5 - J;Article AV - English IS - 0278-4343 UR - ISI:000176179200004 L2 - larval settlement;larval transport;stratification;internal tidal bores;internal waves;INTERNAL TIDAL BORES; INTERTIDAL BARNACLES; SHOREWARD TRANSPORT; CONTINENTAL-SHELF; TEMPORAL PATTERNS; WEST-COAST; CURRENTS; RECRUITMENT; WAVES; USA SO - Continental Shelf Research 2002 ;22(8):1183-1198 6466 UI - 10178 AU - Pingali PL AU - Traxler G AD - CIMMYT Int, Econ Program, Mexico City, DF, MexicoAuburn Univ, Auburn, AL, USAPingali, PL, CIMMYT Int, Econ Program, Mexico City, DF, Mexico TI - Changing locus of agricultural research: will the poor benefit from biotechnology and privatization trends? MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 10 U4 - Agricultural Economics & Policy;Economics;Food Science & Technology;Nutrition & Dietetics U5 - J;Article NT - DUPLICATE AV - English IS - 0306-9192 UR - ISI:000178298600003 L2 - biotechnology;agricultural research;public sector;private sector;developing countries;poverty reduction SO - Food Policy 2002 ;27(3):223-238 6467 UI - 11212 AU - Pino JA AU - Borges P AU - Martinez MA AU - Varges M AU - Flores H AU - del Campo STM AU - Fuentes V AD - Inst Invest Indistria Alimenticia IIIA, Havana 19200, CubaCtr Invest & Asistencia Tecnol & Diseno Estado Ja, Guadalajara, Jalisco, MexicoInst Invest Fundamentales Agr Trop Alejandro de H, Havana, CubaPino, JA, Inst Invest Indistria Alimenticia IIIA, Carr Del Guatao Km 3 1-2, Havana 19200, Cuba TI - Essential oil of Mentha piperita L. grown in Jalisco AB - Steam-distilled volatiles of Mentha piperita L. grown in Jalisco was analyzed by GC/MS. Among the 64 compounds identified, menthone (15.4%), menthofuran (18.2%), menthol (35.4%) and menthyl acetate (12.4%) were the major constituents MH - Cuba MH - Mexico|Jalisco PB - CAROL STREAM: ALLURED PUBL CORP RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1041-2905 UR - ISI:000175411700013 L2 - Mentha piperita;Labiatae;essential oil composition;menthone;menthofuran;menthol;inenthyl acetate SO - Journal of Essential Oil Research 2002 ;14(3):189-190 6468 UI - 9706 AU - Pisarchik AN AU - Kuntsevich BF AD - Ctr Invest Opt, Guanajuato 37150, MexicoNatl Acad Sci, BI Stepanov Inst Phys, Minsk 220072, ByelarusPisarchik, AN, Ctr Invest Opt, Guanajuato 37150, Mexico TI - Control of multistability in a directly modulated diode laser AB - A semiconductor laser with modulated injection current has the property that many competing behaviors are possible and the system tends to alternate among them. Such a situation is not desirable if a stable output is required. We show with numerical simulations that additional slow harmonic modulation can annihilate undesirable coexisting attractors in this laser. We demonstrate great flexibility of the method in manipulating the laser's dynamics to select a desired behavior and even to make the system monostable MH - Byelarus MH - Mexico|Guanajuato PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9197 UR - ISI:000179647000005 L2 - amplitude modulation;nonlinear systems;semiconductor lasers;SEMICONDUCTOR-LASERS; COEXISTING ATTRACTORS; SYSTEM; SYNCHRONIZATION; PARAMETER; ORBITS SO - Ieee Journal of Quantum Electronics 2002 ;38(12):1594-1598 6469 UI - 9669 AU - Planat M AU - Rosu H AU - Perrine S AD - CNRS, Lab Phys & Metrol Oscillateurs, F-25044 Besancon, FranceIPIC&T, Dept Appl Math, San Luis Potosi, MexicoPlanat, M, CNRS, Lab Phys & Metrol Oscillateurs, 32 Ave Observ, F-25044 Besancon, France TI - Ramanujan sums for signal processing of low-frequency noise AB - An aperiodic (low-frequency) spectrum may originate from the error term in the mean value of an arithmetical function such as Mobius function or Mangoldt function, which are coding sequences for prime numbers. In the discrete Fourier transform the analyzing wave is periodic and not well suited to represent the low-frequency regime. In place we introduce a different signal processing tool based on the Ramanujan sums c(q)(n), well adapted to the analysis of arithmetical sequences with many resonances p/q. The sums are quasiperiodic versus the time n and aperiodic versus the order q of the resonance. Different results arise from the use of this Ramanujan-Fourier transform in the context of arithmetical and experimental signals MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179630800125 SO - Physical Review e 2002 ;66(5): 6470 UI - 10743 AU - Plank LR AU - Lawrence JM AU - Lawrence AL AU - Olvera RM AD - Univ S Florida, Dept Biol, Tampa, FL 33620, USATexas A&M Univ, Texas Agr Expt Stn, Port Aransas, TX 78373, USAInd Organ, Nuevo Leon 64260, MexicoLawrence, JM, Univ S Florida, Dept Biol, 4202 E Fowler Ave,SCA 110, Tampa, FL 33620 USA TI - The effect of dietary carotenoids on gonad production and carotenoid profiles in the sea urchin Lytechinus variegatus AB - Although dietary carotenoids are generally considered important in sea urchin aquaculture only for their effect on gonad color, they also have important biological roles. The effects of dietary carotenoids on gonad production and organ carotenoid profiles of Lytechinus variegatus were examined. Individuals were collected in January 1999 and fed a replete diet with a level of 0.60 mg carotenoids/kg for 4 wk, followed by one of four prepared diets for 8 wk: one without supplemental carotenoids, one with beta-carotene (16.92 mg carotenoids/kg feed), and two carotenoid mixtures, one high in zeaxanthin (5.28 mg carotenoids/kg feed) and another high in capsanthin (9.63 mg carotenoids/kg feed). The carotenoid profiles of the body compartments differed. The primary carotenoid in gonads of males and females was echinenone. The carotenoid profile of the test was similar to that of the gonad. The carotenoid profile of the gut varied with diet, but was not identical to composition of the diet. The gut profiles included echinenone but at lower concentrations than in the gonad and test. The carotenoid profile in the gut probably results from the presence of the carotenoids absorbed and those metabolized. The results suggest that several pathways exist to metabolize dietary carotenoids and that some of them are in the gut. The concentration of carotenoids in the gut (g wet weight) was higher than that of the gonad, which was higher than that of the test. The gonads increased significantly in size regardless of diet, indicating carotenoids; are not required for gonad production under the conditions of this experiment. Although the concentration of carotenoids in the gonad decreased over time, the absolute amount of carotenoids increased with the increase in gonad size. Either gonad growth was more rapid than carotenoid deposition or differential deposition in nutritive cells and gametogenic cells occurred, or the amount of carotenoids used in the diets was too low to have an effect MH - USA MH - Mexico|Nuevo Leon PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 8 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000176741800004 L2 - PSEUDOCENTROTUS-DEPRESSUS; STRONGYLOCENTROTUS-DROEBACHIENSIS; ARTIFICIAL DIETS; VITAMIN-A; SURVIVAL; EGG SO - Journal of the World Aquaculture Society 2002 ;33(2):127-137 6471 UI - 11205 AU - Plascencia-Jatomea M AU - Olvera-Novoa MA AU - rredondo-Figueroa JL AU - Hal GM AU - Shirai K AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Merida, Mexico City 07000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Hidrobiol, Mexico City 09340, DF, MexicoUniv Loughborough, Dept Chem Engn, Loughborough, Leics, EnglandShirai, K, Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Av San Rafael Atlixco,186 Col Vicertina, Mexico City 09340, DF, Mexico TI - Feasibility of fishmeal replacement by shrimp head silage protein hydrolysate in Nile tilapia (Oreochromis niloticus L) diets AB - This study provides information on the use of shrimp head silage protein hydrolysate (SPH) as an alternative protein source for tilapia feeding. Six diets (28% protein, 12% lipid) were prepared where fishmeal protein was replaced at levels of 0 (control), 10, 15, 209 25 and 30% with the hydrolysate. The diets were supplied to Nile tilapia fry (338mg initial weight) stocked in plastic recirculating 201 tanks (10 animals per tank), with three replicates per treatment. After an 8 week experimental period, fish fed the diets containing 10 and 15% SPH showed significantly better performance in terms of final body weight, weight gain (%), mean daily weight gain (mg day (-1) ), specific growth ratio and feed conversion ratio than those fed the control diet (fishmeal as protein source) and higher-SPH diets. It is concluded that shrimp head hydrolysate is a promising alternative protein source for tilapia feeding, improving growth ratio at dietary inclusion levels as high as 15%. In addition, the diets with added shrimp silage protein were well accepted by the fish, which avidly consumed the feed during the experiment. (C) 2002 Society of Chemical Industry MH - United Kingdom MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000175399800010 L2 - silage;protein hydrolysates;tilapia;fishmeal;lactic acid fermentation;nutrition;shrimp wastes;AMINO-ACID HYDROLYSATE; CARP CYPRINUS-CARPIO; MEAL; FRY; CONCENTRATE; MOSSAMBICUS; GROWTH; WASTE SO - Journal of the Science of Food and Agriculture 2002 ;82(7):753-759 6472 UI - 11469 AU - Plata C AU - Meade P AU - Vazquez N AU - Hebert SC AU - Gamba G AD - Inst Nacl Ciencias Med & Nutr SZ, Unit Mol Physiol, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 14000, DF, MexicoYale Univ, Sch Med, New Haven, CT, USA TI - Functional characterization of the renal-specific Na-K-2Cl cotransporter isoforms MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533600291 SO - Faseb Journal 2002 ;16(4):A52-A52 6473 UI - 11511 AU - Plata C AU - Meade P AU - Vazquez N AU - Hebert SC AU - Gamba G AD - Univ Nacl Autonoma Mexico, Mol Physiol Unit, Inst Invest Biomed, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoYale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06520, USAGamba, G, Univ Nacl Autonoma Mexico, Mol Physiol Unit, Inst Invest Biomed, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Functional properties of the apical Na+-K+-2Cl(-) cotransporter isoforms AB - The bumetanide-sensitive Na+:K+:2Cl(-) cotransporter (BSC1) is the major pathway for salt reabsorption in the apical membrane of the mammalian thick ascending limb of Henle. Three isoforms of the cotransporter, known as A, B, and F, exhibit axial expression along the thick ascending limb. We report here a functional comparison of the three isoforms from mouse kidney. When expressed in Xenopus oocytes the mBSC1-A isoform showed higher capacity of transport, with no difference in the amount of surface expression. Kinetic characterization revealed divergent affinities for the three cotransported ions. The observed EC50 values for Na+, K+, and Cl- were 5.0 +/- 3.9, 0.96 +/- 0.16, and 22.2 +/- 4.8 mm for mBSC1-A, 3.0 +/- 0.6, 0.76 +/- 0.07, and 11.6 +/- 0.7 mm for mBSC1-B; and 20.6 +/- 7.2, 1.54 +/- 0.16, and 29.2 +/- 2.1 mM for mBSC1-F, respectively. Bumetanide sensitivity was higher in mBSC1-B compared with the mBSC1-A and mBSC1-F isoforms. All three transporters were partially inhibited by hypotonicity but to different extents. The cell swelling-induced inhibition profile was mBSC1-F > mBSC1-B > mBSC1-A. The function of the Na+:K+:2Cl(-) cotransporter was not affected by extracellular pH or by the addition of metolazone, 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid (DIDS), or R(+)-[(2n-butyl-6,7-dichloro-2-cyclopentyl-2,3-dihydro-1-oxo-1- H-indenyl-5-yl) -oxyl acetic acid (DIOA) to the extracellular medium. In contrast, exposure of oocytes to HgCl2 before the uptake period reduced the activity of the cotransporter. The effect of HgCl2 was dose-dependent, and mBSC1-A and mBSC1-B exhibited higher affinity than mBSC1-F. Overall, the functional comparison of the murine apical renal-specific Na+:K+:2Cl(-) cotransporter isoforms A, B, and F reveals important functional, pharmacological, and kinetic differences, with both physiological and structural implications MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 35 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000174613100033 L2 - K-CL COTRANSPORTER; THICK ASCENDING LIMB; NA-K-2CL COTRANSPORTER; CHLORIDE TRANSPORT; SODIUM-CHLORIDE; BUMETANIDE BINDING; BARTTERS-SYNDROME; XENOPUS-LAEVIS; ION-TRANSPORT; CO-TRANSPORT SO - Journal of Biological Chemistry 2002 ;277(13):11004-11012 6474 UI - 9459 AU - Plebanski JF AU - Rozga K AD - IPN, Ctr Invest & Estud Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Puerto Rico, Dept Math, Mayaguez, PR 00681, USAPlebanski, JF, IPN, Ctr Invest & Estud Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - On certain twisting type-N solutions of Einstein equations with pure radiation energy-momentum tensor and nonvanishing shear AB - An explicit form of a certain class of type-N solutions of Einstein equations with pure radiation energy-momentum tensor is studied. In particular, the general solution of a constraint equation is found and the uniqueness of an example which already exists in the literature is established. The metric depends on two nonzero real parameters and a holomorphic function h of one complex variable. The congruence of principal null geodesics possesses nonvanishing twist and shear. If h is entire and nowhere vanishing, the solution is interpreted by means of geometrically distinguished set of freely failing observers as a gravitational wave accompanied by an incoherent electromagnetic radiation in an 'expanding' half-space of a three-space with the curvature's singularity at the boundary of the half-space MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000180197300012 L2 - GRAVITATIONAL-FIELDS; NONLINEAR GRAVITONS; METRICS SO - Classical and Quantum Gravity 2002 ;19(23):6025-6048 6475 UI - 11692 AU - Plebanski JF AU - Przanowski M AU - Turrubiates FJ AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoTech Univ Lodz, Inst Phys, PL-93005 Lodz, PolandPlebanski, JF, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Matrix representation of the generalized Moyal algebra AB - It is shown that the isomorphism between the generalized Moyal algebra and the matrix algebra follows in a natural manner from the generalized Weyl quantization rule and from the well known matrix representation of the annihilation and creation operators MH - Mexico|Distrito Federal MH - Poland PB - KRAKOW: ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0587-4254 UR - ISI:000174179400002 L2 - INFINITE-DIMENSIONAL ALGEBRAS; FORMALISM SO - Acta Physica Polonica B 2002 ;33(2):575-581 6476 UI - 11005 AU - Plionis M AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Observ Athens, Inst Astron & Astrophys, Athens 18110, GreecePlionis, M, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Recent dynamical evolution of galaxy clusters AB - Evidence is presented for the recent evolution of the relaxation processes in clusters of galaxies, using large optical and X-ray cluster samples. The criteria of the cluster relaxation used are the cluster ellipticity, the intracluster medium (ICM) temperature, and X-ray cluster luminosity. We find evidence of varying strength and significance of all three indicators evolving with redshift for z less than or similar to 0.15. This result supports the view that clusters have mostly stopped undergoing mergers and accreting matter, as expected in a low-Omega(m) universe, and are now in the process of gravitational relaxation, which reduces their flattening, their ICM temperature (shock heated during the merging phase), and their X-ray luminosity. These results support similar recent claims of Melott, Chambers, Miller MH - Greece MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176005600014 L2 - galaxies : clusters : general;galaxies : evolution;large scale structure of universe;SAMPLE; SUBSTRUCTURE SO - Astrophysical Journal 2002 ;572(1):L67-L70 6477 UI - 11747 AU - Poater J AU - Sola M AU - Duran M AU - Robles J AD - Univ Girona, Inst Quim Computac, E-17071 Girona, Catalonia, SpainUniv Girona, Dept Quim, E-17071 Girona, Catalonia, SpainUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoSola, M, Univ Girona, Inst Quim Computac, E-17071 Girona, Catalonia, Spain TI - Analysis of the effect of changing the a(0) parameter of the Becke3-LYP hybrid functional on the transition state geometries and energy barriers in a series of prototypical reactions AB - A series of eleven gas-phase chemical reactions have been examined to assess the dependence of transition state geometries and energy barriers, as well as energy differences between reactants and products, on the a(0) B3LYP functional parameter. Throughout the study we have changed the a(0) parameter from 0.1 to 0.9 and for the a(c) and a(x) parameters we have followed the relationships a(x) = 1 - a(0) and a(c) = a(x). By comparing with the QCISD transition state geometries and energy barriers, our systematic study allows us to identify the influence of the a(0) parameter in the reactions studied. In general, B3LYP calculations with the original parameters underestimate energy barriers, this trend being corrected when the a(0) parameter increases. Our study also shows that the fraction of Hartree-Fock exchange needed to predict accurate barrier heights differs from the optimal fraction needed to predict thermochemical properties and geometries MH - Mexico|Guanajuato MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Review AV - English IS - 1463-9076 UR - ISI:000173964200004 L2 - DIELS-ALDER REACTIONS; GENERALIZED GRADIENT APPROXIMATION; MOLECULAR-ORBITAL METHODS; AB-INITIO DYNAMICS; POST-HARTREE-FOCK; GAS-PHASE; PROTON-TRANSFER; ADIABATIC-CONNECTION; PRACTICAL TOOL; VINYL ALCOHOL SO - Physical Chemistry Chemical Physics 2002 ;4(5):722-731 6478 UI - 9525 AU - Pogosyan G AU - Sissakian A AU - Winternitz P AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Theoret Phys Lab, Dubna 141980, RussiaYerevan State Univ, Int Ctr Adv Studies, Yerevan 375025, ArmeniaUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaPogosyan, G, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Separation of variables and Lie algebra contractions. Applications to special functions AB - A review is given of some recently obtained results on analytic contractions of Lie algebras and Lie groups and their application to special function theory. The contractions considered are from O(3) to E(2) and from O(2, 1) to E(2) or E(1, 1). The analytic contractions provide relations between separable coordinate systems on various homogeneous manifolds. They lead to asymptotic relations between basis functions and overlap functions for the representations of different groups MH - Armenia MH - Canada MH - Mexico|Morelos MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7796 UR - ISI:000179894600022 L2 - CONTINUOUS GRADED CONTRACTIONS; REPRESENTATIONS; POLYNOMIALS; DISCRETE SO - Physics of Particles and Nuclei 2002 ;33():S123-S144 6479 UI - 11069 AU - Pogosyan GS AU - Winternitz P AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoYerevan State Univ, Int Ctr Adv Sutides, Yerevan 375049, ArmeniaUniv Montreal, Ctr Rech Math, Montreal, PQ H3C 3J7, CanadaUniv Montreal, Dept Math & Stat, Montreal, PQ H3C 3J7, CanadaPogosyan, GS, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Separation of variables and subgroup bases on n-dimensional hyperboloids AB - A graphical formalism is introduced for describing subgroup type coordinates on n-dimensional Lorentzian hyperboloids imbedded into n+1 dimensional Minkowski spaces. The O(n,1) group element is parametrized according to different subgroup chains, involving Lorentz, rotation, and Euclidean subgroups. The coordinates are then induced by the corresponding group action. Eigenfunctions of the Laplace-Beltrami operator are obtained as products of Jacobi functions, associated Legendre functions, and modified Bessel functions. (C) 2002 American Institute of Physics MH - Armenia MH - Canada MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000175746200034 L2 - MAXIMAL ABELIAN SUBALGEBRAS; LIE-ALGEBRAS; CONTRACTIONS; SPHERE SO - Journal of Mathematical Physics 2002 ;43(6):3387-3410 6480 UI - 9652 AU - Pohlan J AD - Colegio Frontera Sur, ECOSUR, Tapachula 30700, Chiapas, MexicoUniv Bonn, Inst Obst & Gemusebau, D-53121 Bonn, GermanyPohlan, J, Colegio Frontera Sur, ECOSUR, Carretera Antiguo Aeropuerto Km 2,5,Apdo Postal 3, Tapachula 30700, Chiapas, Mexico TI - Complementary effects of weeds in coffee plantations in Chiapas, Mexico AB - The State of Chiapas, with 76.000 ha of coffee plantations is the most important growing area in Mexico. The coffee ecosystem with Coffea arabica and Coffea canephora are characterized by different intensities of cultivating, high diversity of soil and climatic conditions and are distributed between 450 and 1800 m a.s.l. The ethnic and cultural differences among coffee growers, small holders and farmers, influence cultivation practices leading to differences in the structure and composition of weed communities. Field experiments were carried out in three different areas of the Soconusco region of Chiapas. The dominance of weeds, the growth and yield of coffee were used to evaluate quantitatively the effects of different weed management regimes. Additionally, the use of weeds as medicinal, spice and vegetable plants, was studied MH - Germany MH - Mexico|Chiapas PB - STUTTGART: EUGEN ULMER GMBH CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - German IS - 0340-8159 UR - ISI:000202836900020 L2 - coffee;weed communities;complementary effects;biomass;yield parameters SO - Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz-Journal of Plant Diseases and Protection 2002 ;():175-182 6481 UI - 9631 AU - Poltev VI AU - Deryabina AS AU - Gonzalez E AU - Grokhlina TI AD - Russian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, RussiaUniv Autonoma Puebla, Puebla 72570, MexicoRussian Acad Sci, Inst Math Problems Biol, Pushchino 142290, Moscow Region, RussiaPoltev, VI, Russian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, Russia TI - Interactions between nucleic acid bases. New parameters of potential functions and new energy minima AB - The parameters of atom - atom potential functions suggested by one of the authors in 1979-1986 were slightly changed. The changes were performed to achive a better agreement with experimental data of interaction energy values in global minima and hydrogen bond lengths. These changes resulted in better accord with experimental values of distances between the layers in DNA monomer crystals and between the base pairs in oligonucleotide duplexes. The refined potential functions were used to calculate the energy of interactions between nucleic acid bases in various mutual positions. The calculations revealed a few types of mutual base arrangements in minima of interaction energy. for each pairwise base combination. A new type of minima was found, which correspond to a nearly perpendicular arrangement of base rings and the formation of the intermolecular hydrogen bond MH - Mexico|Puebla MH - Russia PB - MOSCOW: MEZHDUNARODNAYA KNIGA RP - NOT IN FILE U3 - TC 5 U4 - Biophysics U5 - J;Article AV - Russian IS - 0006-3029 UR - ISI:000179774600005 L2 - nucleic acids;computer simulation;molecular mechanics;interaction of bases;potential functions;COMPLEX-FORMATION; SIMULATION; ENERGETICS SO - Biofizika 2002 ;47(6):996-1004 6482 UI - 10446 AU - Ponce-Macotela M AU - Martinez-Gordillo MN AU - Bermudez-Cruz RM AU - Salazar-Schettino PM AU - Ortega-Pierres G AU - Ey PL AD - Parasitol Expt Inst Nacl Pediat, Mexico City 04530, DF, MexicoIPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07738, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoUniv Adelaide, Dept Mol Biosci, Adelaide, SA 5005, AustraliaPonce-Macotela, M, Parasitol Expt Inst Nacl Pediat, Insurgentes Sur 3700-C, Mexico City 04530, DF, Mexico TI - Unusual prevalence of the Giardia intestinalis A-II subtype amongst isolates from humans and domestic animals in Mexico MH - Australia MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Parasitology U5 - J;Letter AV - English IS - 0020-7519 UR - ISI:000177414600014 L2 - AUSTRALIA; DOGS SO - International Journal for Parasitology 2002 ;32(9):1201-1202 6483 UI - 9540 AU - Pons-Porrata A AU - Ruiz-Shulcloper J AU - Martinez-Trinidad JF AD - Univ Oriente, Dept Comp Sci, Santiago De Cuba, CubaInst Cybernet Math & Phys, Lab Pattern Recognit, Havana, CubaNatl Inst Astrophys Opt & Elect, Dept Comp Sci, Puebla, MexicoPons-Porrata, A, Univ Oriente, Dept Comp Sci, Santiago De Cuba, Cuba TI - RGC: A new conceptual clustering algorithm for mixed incomplete data sets AB - In this paper, a new conceptual algorithm for the conceptual analysis of mixed incomplete data sets is introduced. This is a logical combinatorial pattern recognition (LCPR) based tool for the conceptual structuralization of spaces. Starting from the limitations of the elaborated conceptual algorithms, our laboratories are working in the application of the methods, the techniques, and in general, the philosophy of the logical combinatorial pattern recognition with the task to improve those limitations. An extension of Michalski's concept of l-complex for any similarity measure, a generalization operator for symbolic variables, and an extension of Michalski's refunion operator are introduced. Finally, the performance of the RGC algorithm is analyzed. A comparison with several known conceptual algorithms is presented. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000179831300015 L2 - conceptual algorithms;logical combinatorial pattern recognition;refunion operator;generalization rules;data analysis SO - Mathematical and Computer Modelling 2002 ;36(11-13):1375-1385 6484 UI - 10116 AU - Pons HA AU - Quiroz Y AU - Herrera-Acosta J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - Inst Nacl Cardiol I Chavez, Mexico City, DF, MexicoUniv Zulia Hosp, INBIOMED Fundacite, Maracaibo, VenezuelaBaylor Coll Med, Houston, TX 77030, USA TI - Nitric oxide synthesis (NOS) inhibition induces activation of nuclear factor kappa B (NF-kappa B) MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757501636 SO - Journal of the American Society of Nephrology 2002 ;13():331A-331A 6485 UI - 8687 AU - Poon AH AU - Jimenez-Corona A AU - Palacios-Martinez M AU - Sifuentes-Osornio J AU - Ponce-de-Leon A AU - Bobadilla M AU - Kato M AU - Laprise C AU - Bitton A AU - Smail PM AU - Garcia-Garcia ML AU - Hudson T AU - Schurr E AD - McGill Univ, Ctr Study Host Resistance, Montreal, PQ H3A 2T5, CanadaInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoStanford Univ, Stanford, CA 94305, USAMontreal Genome Ctr, Montreal, PQ, CanadaComplexe Hosp Sagami, Chicoutimi, PQ, CanadaUniv Quebec, Chicoutimi, PQ, CanadaMcGill Univ, Ctr Hlth, Div Gastroenterol, Montreal, PQ H3A 2T5, Canada TI - Comparative genetic study of tuberculosis, asthma and inflammatory bowel disease susceptibilities MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000178025801618 SO - American Journal of Human Genetics 2002 ;71(4):448-448 6486 UI - 9994 AU - Possingham HP AU - Andelman SJ AU - Burgman MA AU - Medellin RA AU - Master LL AU - Keith DA AD - Univ Queensland, Ctr Ecol, Brisbane, Qld 4072, AustraliaUCSB, Natl Ctr Ecol Anal & Synth, Santa Barbara, CA 93101, USAUniv Melbourne, Sch Bot, Parkville, Vic 3010, AustraliaUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoNatureServe, Boston, MA 02111, USANew S Wales Natl Parks & Wildlife Serv, Hurstville 2220, AustraliaPossingham, HP, Univ Queensland, Ctr Ecol, Brisbane, Qld 4072, Australia TI - Limits to the use of threatened species lists AB - Threatened species lists are designed primarily to provide an easily understood qualitative estimate of risk of extinction. Although these estimates of risk can be accurate, the lists have inevitably become linked to several decision-making processes. There are four ways in which such lists are commonly used: to set priorities for resource allocation for species recovery; to inform reserve system design; to constrain development and exploitation; and to report on the state of the environment. The lists were not designed for any one of these purposes, and consequently perform some of them poorly. We discuss why, if and how they should be used to achieve these purposes MH - Australia MH - Mexico|Distrito Federal MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 59 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Editorial Material AV - English IS - 0169-5347 UR - ISI:000178637900010 L2 - CONSERVATION PRIORITIES; UNITED-STATES; ENDANGERMENT; DIVERSITY; RHINOS; RISK SO - Trends in Ecology & Evolution 2002 ;17(11):503-507 6487 UI - 10052 AU - Potter KN AU - Velazquez-Garcia JD AU - Torbert HA AD - USDA ARS, Grassland Soil & Water Res Lab, Temple, TX 76502, USAINIFAP, CENAPROS, Natl Ctr Sustainable Agr, Morelia, Michoacan, MexicoPotter, KN, USDA ARS, Grassland Soil & Water Res Lab, Temple, TX 76502 USA TI - Use of a submerged jet device to determine channel erodibility coefficients of selected soils of Mexico AB - More than half of Mexico's soil and water resources are considered moderately to severely degraded, primarily due to erosion and sedimentation. Characterization of soil susceptibility to erosion in the field is often hampered by difficulty in obtaining adequate water supplies. We tested a method to determine soil erodibility coefficients for concentrated water flow that had not been previously applied to agricultural soils. The submerged jet method of determining soil erodibility coefficients was tested on six soils in central Mexico of varying texture and predominant clay mineralogy near the end of the corn (Zea mays Q growing season. The resulting erodibility coefficients generally segregated soils of similar texture and mineralogy. Soil silt plus very fine sand percentage and Plasticity Index were important soil properties affecting the Jet Index values. Moldboard plowed soils were more erodible at the end of the growing season than no-tilled soils at all sites except for two recent volcanic soils. The results of these tests, along with the relative ease of use and minimum labor and water requirements, suggest that the submerged jet device is a useful too to determine soil erodibility coefficients of agricultural soils MH - Mexico|Michoacan MH - USA PB - ANKENY: SOIL WATER CONSERVATION SOC RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Soil Science;Water Resources U5 - J;Article AV - English IS - 0022-4561 UR - ISI:000178600300013 L2 - concentrated flow;erosion;submerged jet;SURFACE ERODIBILITY; EARTHEN CHANNELS; HIGH STRESSES; EROSION SO - Journal of Soil and Water Conservation 2002 ;57(5):272-277 6488 UI - 9609 AU - Poznyak AS AU - Duncan TE AU - Pasik-Duncan B AU - Boltyanski VG AD - Dept Control Automat, Mexico City 07000, DF, MexicoUniv Kansas, Dept Math, Lawrence, KS 66045, USACIMAT, Guanajuato 36000, MexicoPoznyak, AS, Dept Control Automat, AP 14 740, Mexico City 07000, DF, Mexico TI - Robust maximum principle for multi-model LQ-problem AB - This paper presents the version of the robust maximum principle in the context of multi-model control formulated as the minimax Bolza problem. The cost function contains a terminal term as well as an integral one. A fixed horizon and terminal set are considered. The necessary conditions of the optimality are derived for the class of uncertain systems given by an ordinary differential equation with parameters from a given finite set. This problem consists in the control design providing a good behaviour for a given class of multi-model system. It is shown that the design of the minimax optimal controller is reduced to a finite-dimensional optimization problem given at the corresponding simplex set containing the weight parameters to be found. The robust optimal control may be interpreted as a mixture (with the optimal weights) of the controls which are optimal for each fixed parameter value. The proof is based on the recent results obtained for minimax Mayer problem (Boltyanski and Poznyak 1999a). The minimax linear quadratic control problem is considered in detail and the illustrative examples dealing with finite as well as infinite horizons conclude this paper MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000179664100003 L2 - MINIMAX CONTROL SO - International Journal of Control 2002 ;75(15):1170-1177 6489 UI - 9750 AU - Poznyak AS AU - Najim K AD - IPN, CINVESTAV, Dept Control Automat, Mexico City 07300, DF, MexicoENSIGC, Proc Control Lab, F-31078 Toulouse, FrancePoznyak, AS, IPN, CINVESTAV, Dept Control Automat, Mexico City 07300, DF, Mexico TI - Learning through reinforcement for N-person repeated constrained games AB - The design and analysis of an adaptive strategy for N-person averaged constrained stochastic repeated game are addressed. Each player is modeled by a stochastic variable-structure learning automaton. Some constraints are imposed on some functions of the probabilities governing the selection of the player's actions. After each stage, the payoff to each player as well as the constraints are random variables. No information concerning the parameters of the game is a priori available. The "diagonal concavity" conditions are assumed to be fulfilled to guarantee the existence and uniqueness of the Nash equilibrium. The suggested, adaptive strategy which uses only the current realizations (outcomes and constraints) of the game, is based on the Bush-Mosteller reinforcement scheme in connection with a normalization procedure. The, Lagrange multipliers approach with a regularization is used. The asymptotic properties of this algorithm are analyzed. Simulation results illustrate the feasibility and the performance of this adaptive strategy MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Computer Science, Artificial Intelligence;Computer Science, Cybernetics U5 - J;Article AV - English IS - 1083-4419 UR - ISI:000179444900006 L2 - adaptive strategies;learning automata (LA);reinforcement learning;repeated game;NASH EQUILIBRIUM; DYNAMICS SO - Ieee Transactions on Systems Man and Cybernetics Part B-Cybernetics 2002 ;32(6):759-771 6490 UI - 10058 AU - Poznyak AS AU - Duncan TE AU - Pasik-Duncan B AU - Boltyansky VG AD - Inst Politecn Nacl, CINVESTAV, Dept Automat Control, Mexico City 07000, DF, MexicoUniv Kansas, Dept Math, Lawrence, KS 66045, USACIMAT, Guanajuato 36000, MexicoPoznyak, AS, Inst Politecn Nacl, CINVESTAV, Dept Automat Control, AP 14 740, Mexico City 07000, DF, Mexico TI - Robust optimal control for minimax stochastic linear quadratic problem AB - The robust maximum principle applied to the minimax linear quadratic problem is derived for stochastic differential equations containing a control-dependent diffusion term. The parametric families of the first and second order adjoint stochastic processes are obtained to construct the corresponding Hamiltonian formalism. The Hamiltonian function used for the construction of the robust optimal control is shown to be equal to the sum of the standard stochastic Hamiltonians corresponding to each value of the uncertain parameter from a given finite set. The cost function is considered on a finite horizon (contains the mathematical expectation of both an integral and a terminal term) and on an infinite one (a time-averaged losses function). These problems belong to the class of minimax stochastic optimization problems. It is shown that the construction of the minimax optimal controller can be reduced to an optimization problem on a finite-dimensional simplex and consists in the analysis of the dependence of Riccati equation solution on the weight parameters to be found MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000178607800002 L2 - CONTINUOUS-TIME; SYSTEMS; UNCERTAINTY SO - International Journal of Control 2002 ;75(14):1054-1065 6491 UI - 10126 AU - Poznyak AS AU - Duncan TE AU - Pasik-Duncan B AU - Boltyansky VG AD - Inst Politecn Nacl, CINVESTAV, Dept Automat Control, Mexico City 07000, DF, MexicoUniv Kansas, Dept Math, Lawrence, KS 66045, USACIMAT, Guanajuato 36000, MexicoPoznyak, AS, Inst Politecn Nacl, CINVESTAV, Dept Automat Control, AP 14740, Mexico City 07000, DF, Mexico TI - Robust stochastic maximum principle for multi-model worst case optimization AB - This paper develops a version of the robust maximum principle applied to the minimax Mayer problem formulated for stochastic differential equations with a control-dependent diffusion term. The parametric families of first and second order adjoint stochastic processes are introduced to construct the corresponding Hamiltonian formalism. The Hamiltonian function used for the construction of the robust optimal control is shown to be equal to the sum of the standard stochastic Hamiltonians corresponding to each possible value of the parameter. The cost function is defined on a finite horizon and contains the mathematical expectation of a terminal term. A terminal condition, given by a vector function, is also considered. The optimal control strategies, adapted for available information, for the wide class of multi- model systems given by a stochastic differential equation with parameters from a given finite set are constructed. This problem belongs to the class of minimax stochastic optimization problems. The proof is based on the recent results obtained for deterministic minimax Mayer problem by Boltyanski and Poznyak as well as on the results of Zhou and of Yong and Zhou, obtained for stochastic maximum principle for non-linear stochastic systems with a single-valued parameter. Two illustrative examples, dealing with production planning and reinsurance-dividend management, conclude this study MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000178498400007 L2 - CONTINUOUS-TIME; MINIMAX CONTROL; SYSTEMS; SENSITIVITY; FEEDBACK; RISK SO - International Journal of Control 2002 ;75(13):1032-1048 6492 UI - 10983 AU - Poznyak T AU - Puga JM AU - Kiseleva E AU - Martinez L AD - Natl Polytech Inst Mexico, Super Sch Chem Engn, Mexico City 07708, DF, MexicoNatl Polytech Inst Mexico, Natl Sch Med & Homeopath, Mexico City 07708, DF, MexicoRussian Acad Sci, Inst Chem Phys, Dept Polymer & Composite Mat, Moscow, RussiaNatl Polytech Inst Mexico, Natl Sch Biol Sci, Dept Aquat Toxicol, Mexico City 07708, DF, MexicoPoznyak, T, Natl Polytech Inst Mexico, Super Sch Chem Engn, Edif 7 UPALM, Mexico City 07708, DF, Mexico TI - Chromium toxic effect monitoring using ozonation method AB - The hexavalent chromiumtoxicity (in vitro) to plasma, erythrocytes, and semen lipids was evaluated. The ozonation technique is suggested to realize the rapid measurements of the lipid peroxidation (LPO) by means of the double bond indexes (DB-index and DBcell-index) calculation. The obtained experimental results permit to conclude that it is possible to detect the chromium effect on LPO by ozonation. The DB-index and DBcell-index determination in the plasma, erythrocytes, and sperm can be considered as a measure of this effect. Ozonation, suggested in this work, can provide the useful preliminary information for specialists and is a quantitative, fast, inexpensive, and simple method. In view of these comments, we conclude that the suggested ozonation method can be considered as the acceptable modern technique for the chromium toxic effect monitoring in vitro MH - Mexico|Distrito Federal MH - Russia PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 1091-5818 UR - ISI:000176049200007 L2 - chromium effect;ozonation;erythrocytes;plasma;semen;HEXAVALENT CHROMIUM; UNSATURATION; MORTALITY; SINGLE; PLASMA; WATER SO - International Journal of Toxicology 2002 ;21(3):211-217 6493 UI - 11308 AU - Pozo JM AU - Sobczyk G AD - Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, SpainUniv Americas Puebla, Dept Fis & Matemat, Mexico City 72820, DF, MexicoPozo, JM, Univ Barcelona, Dept Fis Fonamental, Diagonal 647, E-08028 Barcelona, Spain TI - Geometric algebra in linear algebra and geometry AB - This article explores the use of geometric algebra in linear and multilinear algebra, and in affine, projective and conformal geometries. Our principal objective is to show how the rich algebraic tools of geometric algebra are fully compatible with and augment the more traditional tools of matrix algebra. The novel concept of an h-twistor makes possible a simple new proof of the striking relationship between conformal transformations in a pseudo-Euclidean space to isometries in a pseudo-Euclidean space of two higher dimensions. The utility of the h-twistor concept, which is a generalization of the idea of a Penrose twistor to a pseudo-Euclidean space of arbitrary signature, is amply demonstrated in a new treatment of the Schwarzian derivative MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000175275600001 L2 - affine geometry;Clifford algebra;conformal group;Euclidean geometry;geometric algebra;Grassmann algebra;horosphere;Lie algebra;linear algebra;Mobius transformation;non-Euclidean geometry;null cone;projective geometry;spectral decomposition;Schwarzian derivative;twistor;CLIFFORD-ALGEBRA SO - Acta Applicandae Mathematicae 2002 ;71(3):207-244 6494 UI - 9821 AU - Pozzo ALMD AU - Aceves F AU - Espinasa R AU - Aguayo A AU - Inguaggiato S AU - Morales P AU - Cienfuegos E AD - Univ Nacl Autonoma Mexico, Circuito Inst, Inst Geofis, Mexico City 04510, DF, MexicoIst Nazl Geofis & Vulcanol, Sez Palermo, I-90146 Palermo, ItalyUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoPozzo, ALMD, Univ Nacl Autonoma Mexico, Circuito Inst, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Influence of volcanic activity on spring water chemistry at Popocatepetl Volcano, Mexico AB - The results of the 7 years (1994-2000) of monthly monitoring of spring water before and during eruptions show response to volcanic activity. Low salinity and temperature characterize most of the springs, which are located on the flanks of Popocatepetl Volcano. The pH ranges from 5.8 to 7.8 and temperature from 3 to 36 degreesC. Oxygen and hydrogen isotopic data show that the is of meteoric origin, but SO42-, Cl-, F-, HCO3-, B, and SO42-/Cl- variations precede main eruptive activity, which is considered linked to influx of magmatic gases and acid fluids that react with sublimates and host rock and mix with the large water system. Na+, Ca2+, SiO2 and Mg2+ concentrations in the water also increased before eruptive activity. The computed partial pressure of CO2 in equilibrium with spring waters shows values higher than air-saturated water (ASW), with the highest values up to 0.73 bar of PCO2. Boron is detected in the water only preceding the larger eruptions. When present, boron concentration is normally under health standard limits, but in two cases the concentration was slightly above. Other components are within health standard limits, except for F- in one spring. (C) 2002 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000179349900011 L2 - volcano monitoring;spring water chemistry;Popocatepetl;Mexico;GEOCHEMISTRY SO - Chemical Geology 2002 ;190(1-4):207-229 6495 UI - 8631 AU - Prades C AU - Arnould I AU - Annilo T AU - Shulenin S AU - Chen ZQ AU - Orosco L AU - Triunfol M AU - Devaud C AU - Maintoux-Larois C AU - Lafargue C AU - Lemoine C AU - Denefle P AU - Rosier M AU - Dean M AD - NCI Frederick, Human Genet Sect, Lab Genom Divers, Frederick, MD 21702, USANCI Frederick, Intramural Res & Support Program, SAIC Frederick, Frederick, MD 21702, USAAventis Pharma SA, Funct Genom, Vitry Sur Seine, FranceIst Pediat, Mexico City, DF, MexicoAventis Pharmaceut, Evry, FranceDean, M, NCI Frederick, Human Genet Sect, Lab Genom Divers, Bld 560,Rm 21-18, Frederick, MD 21702 USA TI - The human ATP binding cassette gene ABCA13, located on chromosome 7p12.3, encodes a 5058 amino acid protein with an extracellular domain encoded in part by a 4.8-kb conserved exon AB - The ABCA subfamily of ATP-binding cassette (ABC) transporters includes eleven members to date. In this study, we describe a new, unusually large gene on chromosome 7p12.3, ABCA13. This gene spans over 450 kb and is split into 62 exons. The predicted ABCA13 protein consists of 5,058 amino acid residues making it the largest ABC protein described to date. Like the other ABCA subfamily members, ABCA13 contains a hydrophobic, predicted transmembrane segment at the N-terminus, followed by a large hydrophilic region. In the case of ABCA13, the hydrophilic region is unexpectedly large, more than 3,500 amino acids, encoded by 30 exons, two of which are 4.8 and 1.7 kb in length. These two large exons are adjacent to each other and are conserved in the mouse Abca13 gene. Tissue profiling of the major transcript reveals the highest expression in human trachea, testis, and bone marrow. The expression of the gene was also determined in 60 tumor cell lines and the highest expression was detected in the SR leukemia, SNB-19 CNS tumor and DU-145 prostate tumor cell lines. ABCA13 has high similarity with other ABCA subfamily genes which are associated with human inherited diseases: ABCA 1 with the cholesterol transport disorders Tangier disease and familial hypoalphalipoproteinemia, and ABCA4 with several retinal degeneration disorders. The ABCA 13 gene maps to chromosome 7p12.3, a region that contains an inherited disorder affecting the pancreas (Shwachman-Diamond syndrome) as well as a locus involved in T-cell tumor invasion and metastasis (INM7), and therefore is a positional candidate for these pathologies. Copyright (C) 2002 S. Karger AG, Basel MH - France MH - USA MH - Mexico|Distrito Federal PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 10 U4 - Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1424-8581 UR - ISI:000182472500006 L2 - RECESSIVE RETINITIS-PIGMENTOSA; STARGARDT-DISEASE; TANGIER-DISEASE; TRANSPORTER GENE; ABCR; MUTATIONS; SEQUENCE; IDENTIFICATION; SUPERFAMILY; DEFICIENCY SO - Cytogenetic and Genome Research 2002 ;98(2-3):160-168 6496 UI - 10258 AU - Prado R AU - Huerta G AD - Univ Simon Bolivar, Caracas 1080, VenezuelaCtr Invest Matemat, Mexico City, DF, MexicoPrado, R, Univ Simon Bolivar, Caracas 1080, Venezuela TI - Time-varying autoregressions with model order uncertainty AB - We explore some aspects of the analysis of latent component structure in non-stationary time series based on time-varying autoregressive (TVAR) models that incorporate uncertainty on model order. Our modelling approach assumes that the AR coefficients evolve in time according to a random walk and that the model order may also change in time following a discrete random walk. In addition, we use a conjugate prior structure on the autoregressive coefficients and a discrete uniform prior on model order. Simulation from the posterior distribution of the model parameters can be obtained via standard forward filtering backward simulation algorithms. Aspects of implementation and inference on decompositions, latent structure and model order are discussed for a synthetic series and for an electroencephalogram (EEG) trace previously analysed using fixed order TVAR models MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Interdisciplinary Applications;Statistics & Probability U5 - J;Article AV - English IS - 0143-9782 UR - ISI:000177950900006 L2 - dynamic linear models;time-varying autoregressions;model uncertainty;time-series decompositions;Markov chain;Monte Carlo (MCMC);CHAIN MONTE-CARLO; PARTICLE FILTERS; SERIES SO - Journal of Time Series Analysis 2002 ;23(5):599-618 6497 UI - 11185 AU - Praserthdam P AU - Ngamsom B AU - Bogdanchikova N AU - Phatanasri S AU - Pramotthana M AD - Chulalongkorn Univ, Dept Chem Engn, Res Ctr Catalysis & Catalyt React Engn, Bangkok 10330, ThailandUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoPraserthdam, P, Chulalongkorn Univ, Dept Chem Engn, Res Ctr Catalysis & Catalyt React Engn, Bangkok 10330, Thailand TI - Effect of the pretreatment with oxygen and/or oxygen- containing compounds on the catalytic performance of Pd-Ag/Al2O3 for acetylene hydrogenation AB - Catalytic performance of Pd-Ag/alpha-Al2O3 was studied for the selective hydrogenation of acetylene in the presence of excess ethylene. The catalyst activation was undertaken prior to the reaction test by the pretreatment with oxygen and/or oxygen-containing compounds, i.e. O-2, NO, N2O, CO and CO2. The enhancement of catalytic performances by the pretreatment was a consequence of an increase in accessible Pd sites responsible for acetylene hydrogenation to ethylene. Further-more, the sites involving direct ethane formation from acetylene could be suppressed by NO, treatment. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Thailand PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000175431500005 L2 - acetylene hydrogenation;Pd-Ag/Al2O3;oxygen-containing compounds;pretreatment;SOL-GEL CATALYSTS; PD-AG ALLOYS; SELECTIVE HYDRODECHLORINATION; SUPPORTED PALLADIUM; UNOCCUPIED STATES; CARBON-MONOXIDE; LOCAL-DENSITY; 1,2-DICHLOROETHANE; PARTICLES; BEHAVIOR SO - Applied Catalysis A-General 2002 ;230(1-2):41-51 6498 UI - 10461 AU - Prieur JL AU - Koechlin L AU - Ginestet N AU - Carquillat JM AU - Aristidi E AU - Scardia M AU - Arnold L AU - Avila R AU - Festou MC AU - Morel S AU - Perez JP AD - CNRS, Observ Midi Pyrenees, UMR 5572, F-31400 Toulouse, FranceUniv Nice, UMR 6525, CNRS, F-06108 Nice 2, FranceOsserv Astron Brera, I-22055 Merate, ItalyObserv Haute Provence, F-04870 St Michel, FranceUNAM, Astron Inst, Morelia 58089, Michoacan, MexicoESO, D-85748 Garching, GermanyPrieur, JL, CNRS, Observ Midi Pyrenees, UMR 5572, 14 Ave E Belin, F-31400 Toulouse, France TI - Speckle observations of composite spectrum stars with PISCO in 1993-1998 AB - We present speckle interferometry observations of 47 composite spectrum stars obtained between 1993 and 1998 at the Pic du Midi Observatory with the PISCO speckle camera. 76% of over 150 independent 10 minute sequences of observations led to a companion detection. Binary component angular separations ranged from 0."05 to 1."2. We also obtained a series of 23 measurements of an additional nine close binaries. PISCO observations confirm, for the first time since their, discovery, the duplicity of HD 29104 (L4), HD 83808 (WGT 1Aa), HD 183912 Aa' (BON Ap), and HD 15729 (HR 6436). Discovered as double by Hipparcos, the particularly difficult to resolve HD 156729 was observed despite the large magnitude difference, Deltam = 4.2, between its two components MH - France MH - Germany MH - Italy MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000177524600006 L2 - astrometry;binaries : visual;stars : fundamental parameters;techniques : high angular resolution;techniques : interferometric;PEAK 4-M TELESCOPE; PIC-DU-MIDI; BINARY STARS; ORBITAL ELEMENTS; MULTIPLE STARS; SAO 6-M; SYSTEMS; INTERFEROMETRY; HIPPARCOS; CLASSIFICATIONS SO - Astrophysical Journal Supplement Series 2002 ;142(1):95-104 6499 UI - 9463 AU - Pritchard DJ AU - Hollington PA AU - Davies WP AU - Gorham J AU - de Leon JLD AU - Mujeeb-Kazi A AD - Univ Wales, Ctr Arid Zone Studies, Bangor LL57 2UW, Gwynedd, WalesRoyal Agr Coll, Cirencester GL7 6JS, Glos, EnglandUniv Autonoma Baja California Sur, Dept Agr, La Paz 23054, BCS, MexicoCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoHollington, PA, Univ Wales, Ctr Arid Zone Studies, Bangor LL57 2UW, Gwynedd, Wales TI - K+/Na+ discrimination in synthetic hexaploid wheat lines: Transfer of the trait for K+/Na+ discrimination from Aegilops tauschii into a Triticum turgidum background AB - Irrigation-induced salinity is a major constraint to crop production in many countries. K+/Na+ discrimination is a trait which enhances salinity tolerance in bread wheat compared to durum wheat, and is present in the wheat ancestor Aegilops tauschii. An experiment is described to assess K+/Na+ discrimination, and other traits, in a number of synthetic hexaploid wheat genotypes, produced by crossing Ae. tauschii with durum wheat. The durum parents of the synthetics were also used in the experiment, along with the CIMMYT test set of salt tolerant entries, and some synthetic hexaploid-based drought-tolerant germplasm. K+/Na+ ratios were lower in the durum parents than in the elite synthetics, confirming that the trait was present in the synthetics, and demonstrating its successful transfer from Ae. tauschii to the synthetic hexaploid wheat (2n=6x=42, AABBDD). The 14 best-performing synthetics had similar K+/Na+ ratios to the tolerant check S24. There were highly significant correlations between K+/Na+ discrimination and fresh weight within the durum parents, the elites, and the CIMMYT set. Backcrosses of some elite synthetics with the drought-susceptible hexaploid Opata failed to show the same level of discrimination as Opata.. The potential of two elite synthetics which were also tolerant to waterlogging, and one tolerant to multiple biotic stresses, for use in breeding programmes for stressed conditions was noted MH - United Kingdom MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal PB - SZEGED: CEREAL RES INST RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0133-3720 UR - ISI:000180339400004 L2 - K+/Na+ discrimination;wide hybridisation;salinity tolerance;synthetic hexaploid wheat;durum wheat;Triticum turgidum;K/NA DISCRIMINATION; SALT TOLERANCE; D-GENOME; YIELD SO - Cereal Research Communications 2002 ;30(3-4):261-267 6500 UI - 9677 AU - Prokunina L AU - Castillejo-Lopez C AU - Oberg F AU - Gunnarsson I AU - Berg L AU - Magnusson V AU - Brookes AJ AU - Tentler D AU - Kristjansdottir H AU - Grondal G AU - Bolstad AI AU - Svenungsson E AU - Lundberg I AU - Sturfelt G AU - Jonssen A AU - Truedsson L AU - Lima G AU - cocer-Varela J AU - Jonsson R AU - Gyllensten UB AU - Harley JB AU - arcon-Segovia D AU - Steinsson K AU - arcon-Riquelme ME AD - Univ Uppsala, Rudbeck Labs, Inst Genet & Pathol, Med Genet Sect, S-75185 Uppsala, SwedenEverygene AB, Uppsala, SwedenUniv Uppsala, Rudbeck Labs, Inst Genet & Pathol, Sect Pathol, S-75185 Uppsala, SwedenUniv Uppsala, Evolut Biol Ctr, Dept Comparat Physiol, S-75185 Uppsala, SwedenKarolinska Inst, Rheumatol Unit, Stockholm, SwedenKarolinska Inst, Ctr Microbiol & Tumor Biol, Stockholm, SwedenKarolinska Inst, Ctr Genom & Bioinformat, Stockholm, SwedenLabdpitalinn, Dept Rheumatol, Reykjavik, IcelandLabdpitalinn, Ctr Rheumatol Res, Reykjavik, IcelandUniv Bergen, Broegelmann Res Lab, Bergen, NorwayHaukeland Univ Hosp, Ctr Med Genet & Mol Med, N-5021 Bergen, NorwayUniv Lund Hosp, Dept Clin Immunol, S-22185 Lund, SwedenUniv Lund Hosp, Dept Rheumatol, S-22185 Lund, SwedenInst Nacl Ciencias Med & Nutr Salvador Zubirdan, Dept Immunol & Rheumatol, Mexico City, DF, MexicoUniv Oklahoma, Dept Med, Arthrit & Immunol Program, Oklahoma Med Res Fdn, Oklahoma City, OK, USAUS Dept Vet Affairs, Oklahoma City, OK, USAAlarcon-Riquelme, ME, Univ Uppsala, Rudbeck Labs, Inst Genet & Pathol, Med Genet Sect, Dag Hammarsjolds Vag 20, S-75185 Uppsala, Sweden TI - A regulatory polymorphism in PDCD1 is associated with susceptibility to systemic lupus erythematosus in humans AB - Systemic lupus erythematosus (SLE, OMIM 152700) is a complex autoimmune disease that affects 0.05% of the Western population, predominantly women(1-4). A number of susceptibility loci for SLE have been suggested in different populations, but the nature of the susceptibility genes and mutations is yet to be identified(5-9). We previously reported a susceptibility locus (SLEB2) for Nordic multi-case families(9,10). Within this locus, the programmed cell death 1 gene (PDCD1, also called PD-1) was considered the strongest candidate for association with the disease(11-14). Here, we analyzed 2,510 individuals, including members of five independent sets of families as well as unrelated individuals affected with SLE, for single-nucleotide polymorphisms (SNPs) that we identified in PDCD1. We show that one intronic SNP in PDCD1 is associated with development of SLE in Europeans (found in 12% of affected individuals versus 5% of controls; P=0.00001, r.r. (relative risk)=2.6) and Mexicans (found in 7% of affected individuals versus 2% of controls; P=0.0009, r.r.=3.5). The associated allele of this SNP alters a binding site for the runt-related transcription factor 1 (RUNX1, also called AML1) located in an intronic enhancer, suggesting a mechanism through which it can contribute to the development of SLE in humans MH - Iceland MH - Mexico|Distrito Federal MH - Norway MH - Sweden MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 240 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1061-4036 UR - ISI:000179593000022 L2 - ALLELE-SPECIFIC HYBRIDIZATION; SIB-PAIR FAMILIES; HUMAN PD-1 GENE; AUTOIMMUNE-DISEASES; CROHNS-DISEASE; T-LYMPHOCYTES; EXPRESSION; IMMUNORECEPTOR; TOLERANCE; PEDIGREES SO - Nature Genetics 2002 ;32(4):666-669 6501 UI - 9932 AU - Prol-Ledesma RM AU - Canet C AU - Melgarejo JC AU - Tolson G AU - Rubio-Ramos MA AU - Cruz-Ocampo JC AU - Ortega-Osorio A AU - Torres-Vera MA AU - Reyes A AD - UNAM, Inst Geofis, Mexico City 04510, DF, MexicoUniv Barcelona, Fac Geol, Dept Cristallog Mineral & Diposits Minerals, Barcelona 08028, SpainUNAM, Inst Geol, Mexico City 04510, DF, MexicoUNAM, Posgrad Ciencias Tierra, Mexico City 04510, DF, MexicoInst Mexicano Petr, Grp Invest Sistemas Marinos, PIMAS, Mexico City 07730, DF, MexicoUNAM, Inst Geog, Mexico City 04510, DF, MexicoInst Geol & Nucl Sci, Lower Hutt, New ZealandProl-Ledesma, RM, UNAM, Inst Geofis, Cd Univ, Mexico City 04510, DF, Mexico TI - Cinnabar deposition in submarine coastal hydrothermal vents, pacific margin of central Mexico AB - Cinnabar deposition was observed in submarine hydrothermal vents at about 10 m depth in the Punta Mita area in western Mexico. The vents occur in basaltic rocks and discharge a mixture of liquid and gas at a temperature of 85degreesC. Tertiary ignimbrites, basaltic lava flows, and mafic intrusions crop out in Punta Mita; however, at present there is no volcanic activity in the area, and the hydrothermal vents do not possess characteristics compatible with a magmatic heat source. The water discharged by the vents is more dilute than seawater, and precious and base metal contents are below detection limits. The gas is composed mostly of nitrogen and methane, and it contains only trace amounts of He, Ar, H-2, CO2, H2S, and O-2. Deposits of carbonates (calcite and aragonite), sulfides (pyrite, cinnabar, minor thallium sulfide, and galena), sulfates (barite), and phosphates (carbonate-hydroxyl apatite) were observed. Cinnabar occurs in association with thallium sulfide within pyrite crusts that line the upflow channels and cover the outflow areas near the vents. The hydrothermal activity in Punta Mita is related to deep circulation of ground water from onshore and convective heating in the high geothermal gradient of the area. The interaction of the hot water with organic matter in the layers of sedimentary rocks produces nitrogen and methane, and mercury and other elements are leached from the volcanic and sedimentary rocks. Mercury remains in solution in the thermal fluid until it reaches the sea floor MH - Mexico|Distrito Federal MH - New Zealand MH - Spain PB - LITTLETON: ECONOMIC GEOLOGY PUBL CO RP - NOT IN FILE U3 - TC 16 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0361-0128 UR - ISI:000179086600010 L2 - NORTHERN BAJA CALIFORNIA; PAPUA-NEW-GUINEA; VOLCANIC BELT; RIVERA PLATE; GEOCHEMISTRY; SUBDUCTION; SEDIMENTS; SEAWATER; MERCURY; EARTHQUAKES SO - Economic Geology and the Bulletin of the Society of Economic Geologists 2002 ;97(6):1331-1340 6502 UI - 10226 AU - Prosen T AU - Seligman TH AU - Weidenmuller HA AD - Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana, SloveniaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyCtr Int Ciencias, Cuernavaca, Morelos, MexicoUniv Mexico, UNAM, Ctr Ciencias Fis, Mexico City, DF, MexicoProsen, T, Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana, Slovenia TI - Integration over matrix spaces with unique invariant measures AB - We present a method to calculate integrals over monomials of matrix elements with invariant measures in terms of Wick contractions. The method gives exact results for monomials of low order. For higher-order monomials, it leads to an error of order 1/N-alpha, where N is the dimension of the matrix and where alpha is independent of the degree of the monomial. We give a lower bound on the integer alpha and show how alpha can be increased systematically. The method is particularly suited for symbolic computer calculation. Explicit results are given for O(N), U(N), and for the circular orthogonal ensemble. (C) 2002 American Institute of Physics MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Slovenia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000178095500041 SO - Journal of Mathematical Physics 2002 ;43(10):5135-5144 6503 UI - 10886 AU - Prosen T AU - Seligman TH AD - Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana, SloveniaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoProsen, T, Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana, Slovenia TI - Decoherence of spin echoes AB - We define a quantity, the so-called purity fidelity, which measures the rate of dynamical irreversibility due to decoherence, observed e.g. in echo experiments, in the presence of an arbitrary small perturbation of the total (system + environment) Hamiltonian. We derive a linear response formula for the purity fidelity in terms of integrated time correlation functions of the perturbation. Our relation predicts, similar to the case of fidelity decay, that the faster the decay of purity fidelity the slower is the decay of time correlations. In particular, we find exponential decay in quantum mixing regime and faster, initially quadratic and later typically Gaussian decay in the regime of nonergodic, e.g. integrable quantum dynamics. We illustrate our approach by an analytical calculation and numerical experiments in the Ising spin 1/2 chain kicked with tilted homogeneous magnetic field where part of the chain is interpreted as a system under observation and part as an environment MH - Mexico|Morelos MH - Slovenia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 37 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000176351700007 L2 - THERMODYNAMIC LIMIT; QUANTUM-SYSTEMS; STABILITY; MOTION; CHAIN; CHAOS SO - Journal of Physics A-Mathematical and General 2002 ;35(22):4707-4727 6504 UI - 9715 AU - Proverbio ZE AU - Schulz PC AU - Puig JE AD - Univ Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Guadalajara, Ctr Ciencias & Ingenierias, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoSchulz, PC, Univ Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - Aggregation of the aqueous dodecyl-trimethylammonium bromide-didodecyldimethylammonium bromide system at low concentration AB - The dodecyltrimethylammonium bromide (DTAB)-didodecyldimethylammonium bromide (DDAB)-water system was studied to elucidate whether the mixed surfactant aggregates are mainly micelles or vesicles, and whether the surfactant-surfactant interaction is ideal or not. The regular solution theory of mixed micelles and the Israelachvili-Mitchell-Ninham (IMN) packing parameter of the aggregated mixture were used. The interaction between dissimilar surfactant species was found to be non-ideal, with a positive value of the regular solution theory interaction parameter. The steric hindrance interaction parameter of Huang and Somasundaran theory indicated that the introduction of DTAB into DDAB layers was favoured at very low DTAB content, but became highly unfavourable when the proportion of DTAB increased. The aggregates were systematically much richer in DDAB than the solution of interaggregates. The IMN values systematically were compatible with flat surfaces, i.e., lamellar liquid crystals and vesicles. The results may be explained by a different composition of the inner and outer monolayers in the bilayer structure of the vesicles MH - Argentina MH - Mexico|Jalisco PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000179563000010 L2 - mixed surfactants;vesicles;packing parameter;cationic surfactants;BINARY SURFACTANT MIXTURES; CRITICAL MICELLE CONCENTRATIONS; MIXED MICELLES; DIALKYLDIMETHYLAMMONIUM BROMIDE; SPONTANEOUS VESICLES; CATIONIC VESICLES; PHASE-BEHAVIOR; DRUG-DELIVERY; SOLUBILIZATION; WATER SO - Colloid and Polymer Science 2002 ;280(11):1045-1052 6505 UI - 9494 AU - Przanowski M AU - Turrubiates FJ AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoTech Univ Lodz, Inst Phys, PL-93005 Lodz, PolandPrzanowski, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Uncertainty relations in deformation quantization AB - Robertson and Hadamard-Robertson theorems on non-negative definite Hermitian forms are generalized to an arbitrary ordered field. These results are then applied to the case of formal power series fields, and the Heisenberg-Robertsop, Robertson-Schrodinger and trace uncertainty relations in deformation. quantization are found. Some conditions under which the uncertainty relations are minimized are also given MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000180090900014 L2 - INTELLIGENT STATES; WIGNER FUNCTIONS; STAR-PRODUCTS; MANIFOLDS SO - Journal of Physics A-Mathematical and General 2002 ;35(49):10643-10661 6506 UI - 11301 AU - Puello-Cruz AC AU - Sangha RS AU - Jones DA AU - Le Vay L AD - CIAD, Unidad Mazatlan Acuicultura & Manejo Ambiental, Mazatlan 82010, Sinaloa, MexicoUniv Wales, Sch Ocean Sci, Menai Bridge, Gwynedd, WalesPuello-Cruz, AC, CIAD, Unidad Mazatlan Acuicultura & Manejo Ambiental, Apdo Postal 711, Mazatlan 82010, Sinaloa, Mexico TI - Trypsin enzyme activity during larval development of Litopenaeus vannamei (Boone) fed on live feeds AB - Larval stages of the Pacific white shrimp, Litopenaeus vannamei (Boone) were fed standard live diets of mixed microalgae from the first to the third protozoea (PZ1 to PZ3), followed by Artemia nauplii until post-larvae 1 (PL1). Trypsin enzyme activity for each larval stage was determined using N -alpha-p-toluenesulphonyl-l-arginine methyl ester (TAME) as a substrate. Results were expressed as enzyme content to assess ontogenetic changes during larval development. Tissue trypsin content (IU mug(-1) DW for each larval stage) was significantly highest at the PZ1 stage and declined through subsequent stages to PL1. This contrasts with previously observed patterns of trypsin development in Litopenaeus setiferus (Linnaeus) and other penaeid genera, which exhibit a peak in trypsin activity at the third protozoea/first mysis (PZ3/M1) larval stage. Litopenaeus vannamei larvae transferred to a diet of Artemia at the beginning of the second protozoea (PZ2) stage were significantly heavier on reaching the first mysis stage (M1) than those fed algae, while survival was not significantly different between treatments. At both PZ2 and PZ3 stages, trypsin content in larvae feeding on Artemia was significantly lower than in those feeding on algae. The rapid decline in trypsin content from PZ1 and the flexible enzyme response from PZ2 suggest that L. vannamei is physiologically adapted to transfer to a more carnivorous diet during the mid-protozoeal stages MH - Mexico|Sinaloa MH - United Kingdom PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000175251600003 L2 - white shrimp larvae;digestive enzymes;trypsin;Litopenaeus vannamei;PENAEUS-SETIFERUS CRUSTACEA; MONODON FABRICIUS; DECAPODA; PENAEIDAE SO - Aquaculture Research 2002 ;33(5):333-338 6507 UI - 9528 AU - Pusztai L AU - Dominguez H AU - Pizio OA AD - Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Neutron Phys Lab, H-1525 Budapest, HungaryUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoPusztai, L, Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Neutron Phys Lab, POB 49, H-1525 Budapest, Hungary TI - Reverse Monte Carlo simulation of the microscopic structure for chemically associating fluids by using experimental data AB - We have performed molecular dynamics simulations of systems consisting of monoatomic and diatomic species, which mimick either equilibrium distributions of particles in dimerizing associating fluids under given external conditions or equivalently, fluid mixtures of spherical and nonspherical particles. The results of MD simulations are given in terms of pair distribution functions of atoms and of the corresponding structure factors. Both sets of data are considered as "experimentally obtained input" for the reverse Monte Carlo (RMC) procedure aimed at the evaluation of the (a priori, unknown) composition of the system, and at getting insight into structural properties that are hidden in the experimental structure factor. We discuss usefulness of the simulation scheme, its accuracy and limitations with a hope of applying the RMC method for more complex chemically associating fluids. (C) 2002 Elsevier Science B.V. All rights reserved MH - Hungary MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000179857700006 L2 - chemically associating liquids;diffraction dat;reverse Monte Carlo modelling;DIRECTIONAL ATTRACTIVE FORCES; REACTION ENSEMBLE METHOD; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; PHASE-EQUILIBRIA; LIQUID WATER; DIMERIZATION; EQUATIONS; SYSTEM SO - Physica A-Statistical Mechanics and Its Applications 2002 ;316(1-4):65-76 6508 UI - 10692 AU - Qadoumi M AU - Becker I AU - Donhauser N AU - Rollinghoff M AU - Bogdan C AD - Univ Erlangen Nurnberg, Inst Klin Mikrobiol Immunol & Hyg, D-91054 Erlangen, GermanyUniv Nacl Autonoma Mexico, Fac Med, Dept Expt Med, Mexico City 04510, DF, MexicoBogdan, C, Univ Erlangen Nurnberg, Inst Klin Mikrobiol Immunol & Hyg, Wasserturmstr 3, D-91054 Erlangen, Germany TI - Expression of inducible nitric oxide synthase in skin lesions of patients with American cutaneous leishmaniasis AB - Cytokine-inducible (or type 2) nitric oxide synthase (iMOS) is indispensable for the resolution of Leishmania major or Leishmania donovani infections in mice. In contrast, little is known about the expression and function of MOS in human leishmaniasis. Here, we show by immunohistological analysis of skin biopsies from Mexican patients with local (LCL) or diffuse (DCL) cutaneous leishmaniasis that the expression of iNOS was most prominent in LCL lesions with small numbers of parasites whereas lesions with a high parasite burden (LCL or DCL) contained considerably fewer iNOS-positive cells. This is the first study to suggest an antileishmanial function of MOS in human Leishmania infections in vivo MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000176909400075 L2 - HUMAN MACROPHAGES; LATENT LEISHMANIASIS; TYPE-2 EXPRESSION; REACTIVE NITROGEN; IMMUNE-RESPONSE; IN-VIVO; INTERFERON; OXYGEN; INNATE; CELLS SO - Infection and Immunity 2002 ;70(8):4638-4642 6509 UI - 11892 AU - Qrtiz P AU - Reguera E AU - Fernandez-Bertran J AD - Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoUniv Havana, Fac Chem, Havana, CubaUniv Havana, Inst Mat & Reagents, Havana, CubaCtr Pharmaceut Chem, Havana, CubaQrtiz, P, Ctr Appl Sci & Adv Technol, Legaria 694,Colonia Irrigac, Mexico City 11500, DF, Mexico TI - Study of the interaction of KF with carbohydrates in DMSO-d(6) by H-1 and C-13 NMR spectroscopy AB - The interaction of KF with sugars (D-glucose, D-xylose, D-galactose, D-ribose, D-mannose, D-lyxose, cellobiose, maltose, maltotriose, amylose, saccharose and gamma-cyclodextrin) were studied by H-1 and C-13 NMR spectroscopies in DMSO-d(6). The main interactions are of the hydrogen bonding type between the sugar hydroxyl protons and the F- anions of KF. The shifts in mutarotation toward the beta anomers are due to the breaking of the (OH)(1)(. . .)(OH)(2) intramolecular hydrogen bonds by F-, which destabilizes the alpha form in glucose, xylose, galactose and ribose. KF also attacks and breaks intermolecular hydrogen bond bridges as those observed between (OH)(2) and (OH)(3), groups of neighboring hexose units in amylose. (C) 2002 Published by Elsevier Science B.V MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-1139 UR - ISI:000173500000002 L2 - potassium fluoride;sugars;mutarotation;hydrogen bonding;H-1 and C-13 NMR;COMPLEXES SO - Journal of Fluorine Chemistry 2002 ;113(1):7-12 6510 UI - 10940 AU - Quevedo R AU - Carlos LG AU - Aguilera JM AU - Cadoche L AD - Pontificia Univ Catolica Chile, Dept Chem Engn & Bioproc, Santiago, ChileUniv Los Lagos, Dept Ciencia & Tecnol Alimentos, Osorno, ChileInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Grad & Invest Alimentos, Mexico City 11340, DF, MexicoAguilera, JM, Pontificia Univ Catolica Chile, Dept Chem Engn & Bioproc, POB 306, Santiago, Chile TI - Description of food surfaces and microstructural changes using fractal image texture analysis AB - Images, particularly photomicrographs, provide qualitative information about surfaces of foods and cells. Methods to analyze the texture of images such as fractional Brownian motion (FBMM), box counting (BCM), and fractal dimension (FD) estimation from frequency domain (FDM), were used to numerically describe the surfaces of foods and the microstructure of potato cells. A FD was calculated for each image using the power-law scaling for self-similar fractals. The surface of analyzed foods had FD varying from 2.22 for chocolate to 2.44 for pumpkin shell. As reference, the FD of sandpaper having increasing grain size or roughness varied from 2.37 to 2.65. FD was also useful to numerically describe microstructural changes with time of an isolated potato cell during heating in oil and of the surface of chocolate undergoing crystallization of fats (blooming). (C) 2002 Elsevier Science Ltd. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 23 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000176206800007 L2 - surface;fractal;image processing;microscopy;starch;frying;blooming;BOX-COUNTING METHOD; CLASSIFICATION; DIMENSION; INSPECTION SO - Journal of Food Engineering 2002 ;53(4):361-371 6511 UI - 10711 AU - Quezada-Calvillo R AU - Rodriguez-Zuniga F AU - Underdown BJ AD - Univ Autonoma San Luis Potosi, CIEP, Fac Ciencias Quim, San Luis Potosi 78340, SLP, MexicoMcMaster Univ, Dept Pathol, Hamilton, ON L8N 3Z5, CanadaQuezada-Calvillo, R, Univ Autonoma San Luis Potosi, CIEP, Fac Ciencias Quim, Av M Nava 6,Zona Univ, San Luis Potosi 78340, SLP, Mexico TI - Partial characterization of murine intestinal maltase-glucoamylase AB - Using papain digestion together with molecular sieving and ion-exchange HPLC, maltase-glucoamylase (MGA) was purified from small intestinal mucosa of CBA/J mice. The Purified enzyme displayed all apparent M.W. of 500-600kDa by SDS-PAGE analysis and under fully denaturing conditions was found to comprise at least three different glycoproteins with apparent M.W. of 410, 275. and 260 kDa, respectively. Thus, murine MGA displayed structural homology to the enzymes obtained from rat and rabbit intestines and differed substantially from the structures reported for the human, pig. and chicken counterparts. The enzyme showed spontaneous degradation during storage at -20 degreesC with accumulation particularly of the 275 and 260 kDa proteins. In addition, IgG obtained from sent of MGA-deficient CBA/Ca mice previously immunized with murine MGA reacted with the native enzyme, as well as with the 410, 275. and 260 kDa components. These results indicated that the 410 kDa component might constitute a precursor of the components with lower apparent M.W. (C) 2002 Elsevier Science (USA). All rights reserved MH - Canada MH - Mexico|San Luis Potosi PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000176911500029 L2 - maltase-glucoamylase;intestine;small;mouse;molecular structure;LACTASE-PHLORIZIN HYDROLASE; SUCRASE-ISOMALTASE COMPLEX; BRUSH-BORDER MEMBRANE; EPITHELIAL-CELLS; DISACCHARIDASE ACTIVITY; MICROVILLAR PROTEINS; RAT INTESTINE; CDNA CLONING; BIOSYNTHESIS; CLEAVAGE SO - Biochemical and Biophysical Research Communications 2002 ;295(2):394-400 6512 UI - 9438 AU - Quintero-Ramos A AU - Bourne M AU - Barnard J AU - Gonzalez-Laredo R AU - nzaldua-Morales A AU - Pensaben-Esquivel M AU - Marquez-Melendez R AD - Univ Autonoma Chihuahua, Fac Chem, Chihuahua, MexicoCornell Univ, New York State Agr Exp Stn, Inst Food Sci, Geneva, NY 14456, USAInst Tecnol Durango, Durango 34080, MexicoQuintero-Ramos, A, Univ Autonoma Chihuahua, Fac Chem, POB 1542-C, Chihuahua, Mexico TI - Low temperature blanching of frozen carrots with calcium chloride solutions at different holding times on texture of frozen carrots AB - The objective of this study was to evaluate the effect of low temperature blanching in calcium chloride solutions to increase firmness retention of frozen carrot slices and to determine optimum conditions to provide a final product with maximum firmness. Low temperature (65C) blanching in CaCl2 solutions (0.05-0.6 molar) for holding times (5-90 min) was performed on carrots 'Apache' cultivar. Calcium absorption was affected (P less than or equal to0.05) by the CaCl2 concentration. Behavior of this variable was adequately fitted by a second order model (R-2=0.99). Firmness was affected (Pless than or equal to0.05) by the CaCl2 solutions and holding times. Optimum conditions gave extrusion forces of 1693-2095 N and calcium levels of 69-144 mg/100 g. These were verified experimentally and agreed closely with predicted calcium absorption and firmness values MH - Mexico|Chihuahua MH - Mexico|Durango MH - USA PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0145-8892 UR - ISI:000180197200004 L2 - RESPONSE-SURFACE METHODOLOGY; GREEN BEANS; OPTIMIZATION; CHEMISTRY; FIRMNESS SO - Journal of Food Processing and Preservation 2002 ;26(5):361-374 6513 UI - 10628 AU - Quiroga JA AU - Servin M AU - Cuevas F AD - Univ Complutense Madrid, Dept Opt, E-28040 Madrid, SpainCtr Invest Opt AC, Guanajuato 37150, MexicoQuiroga, JA, Univ Complutense Madrid, Dept Opt, Ciudad Univ S-N, E-28040 Madrid, Spain TI - Modulo 2 pi fringe orientation angle estimation by phase unwrapping with a regularized phase tracking algorithm AB - The fringe orientation angle provides useful information for many fringe-pattern-processing techniques. From a single normalized fringe pattern (background suppressed and modulation normalized), the fringe orientation angle can be obtained by computing the irradiance gradient and performing a further aretangent computation. Because of the 180degrees ambiguity of the fringe direction, the orientation angle computed from the gradient of a single fringe pattern can be determined only modulo pi. Recently, several studies have shown that a reliable determination of the fringe orientation angle modulo 2pi is a key point for a robust demodulation of the phase from a single fringe pattern. We present an algorithm for the computation of the modulo 2pi fringe orientation angle by unwrapping the orientation angle obtained from the gradient computation with a regularized phase tracking method. Simulated as well as experimental results are presented. (C) 2002 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000177021500007 L2 - DEMODULATION SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2002 ;19(8):1524-1531 6514 UI - 11789 AU - Quiroga JA AU - Servin M AU - Marroquin JL AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainCtr Invest Opt AC, Leon 37150, MexicoCtr Invest Matemat, Guanajuato 36240, Gto, MexicoQuiroga, JA, Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, Ciudad Univ S-N, E-28040 Madrid, Spain TI - Regularized phase tracking technique for demodulation of isochromatics from a single tricolour image AB - In this work we propose a robust fringe demodulation technique applied to the analysis of tricolour isochromatic fringe patterns produced in photoelasticity. The method used is a regularized phase tracking (RPT) algorithm, which takes into account the different information contained in the three bands of the colour image obtained with an RGB-CCD camera. Automatic determination of the zero-order isochromatic and the area of interest, the use of a discrete fluorescent illumination and the use of the RPT configures a robust method for automatic demodulation of isochromatic fringe patterns. The performance of the method is discussed and experimental results are presented MH - Mexico|Guanajuato MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Multidisciplinary;Instruments & Instrumentation U5 - J;Article AV - English IS - 0957-0233 UR - ISI:000173837700020 L2 - stress;retardation;photoelasticity;polariscope;fringe pattern processing;PHOTOELASTICITY SO - Measurement Science & Technology 2002 ;13(1):132-140 6515 UI - 10727 AU - Quiroz-Figueroa FR AU - Fuentes-Cerda CFJ AU - Rojas-Herrera R AU - Loyola-Vargas VM AD - Ctr Invest Cient Yucatan, Merida 97200, Yucatan, MexicoInst Nacl Ciencias Agr, Havana, CubaLoyola-Vargas, VM, Ctr Invest Cient Yucatan, Calle 43 130,Col Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Histological studies on the developmental stages and differentiation of two different somatic embryogenesis systems of Coffea arabica AB - Histocytological analysis carried out on leaf explants of Coffea arabica undergoing somatic embryogenesis revealed that, using a culture method involving a single Gelrite-containing semisolid medium, the entire region surrounding the edge of the plant-derived leaf explants showed the differentiation of organized structures with little or no callusing. Histological examination of embryogenesis without callus formation (direct somatic embryogenesis) revealed that at approximately I week after the explant had been placed in culture, the development of the embryo began in the form of a small, isodiametric, densely cytoplasmic cell that underwent a series of organized divisions. In embryogenesis from callus (indirect somatic embryogenesis), however, the embryogenic cell was observed within the first week. Our histological observations indicate that both direct and indirect somatic embryos of coffee that form on explanted leaf segments and callus, respectively, have a unicellular origin MH - Cuba MH - Mexico|Yucatan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 21 U4 - Plant Sciences U5 - J;Article AV - English IS - 0721-7714 UR - ISI:000176831900007 L2 - Coffea arabica;somatic embryogenesis;histological study;ontogenesis;CULTURED LEAF EXPLANTS; HIGH-FREQUENCY; EMBRYOS; INDUCTION SO - Plant Cell Reports 2002 ;20(12):1141-1149 6516 UI - 7129 AU - Quiroz-Mercado H AU - Blumenkranz MS AU - Palanker DV AU - Sanislo SR AU - Garcia-Aguirre G AU - Magdalenic R AU - raya-Munoz CE AU - Ruiz M AD - APEC, Retina Serv, Mexico City, DF, MexicoStanford Univ, Stanford, CA 94305, USA TI - Surgical therapy of central retinal vein occlusion by creation of choroidal retinal anastomosis MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606601829 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U431-U431 6517 UI - 11622 AU - Quiroz-Mercado H AU - Gonzalez RS AU - Yeshurun I AD - Univ Nacl Autonoma Mexico, Asociac Para Evitar Ceguera Mexico, IAP Hosp Dr Luis Sanchez Bulnes, Mexico City 04030, DF, MexicoTel Aviv Univ, Sackler Fac Med, Edith Wolfson Med Ctr, IL-69978 Tel Aviv, IsraelQuiroz-Mercado, H, Univ Nacl Autonoma Mexico, Asociac Para Evitar Ceguera Mexico, IAP Hosp Dr Luis Sanchez Bulnes, Vincente Garcia Torres 46,Col San Lucas, Mexico City 04030, DF, Mexico TI - Single-bite suture for securing the infusion cannula in vitrectomy MH - Israel MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Article AV - English IS - 0275-004X UR - ISI:000174279600027 SO - Retina-the Journal of Retinal and Vitreous Diseases 2002 ;22(1):121-123 6518 UI - 9770 AU - Quiroz Y AU - Herrera-Acosta J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - FUNDACITE Zulia, Inst Invest Biomed, Maracaibo, VenezuelaUniv Hosp, Renal Serv & Lab, Maracaibo, VenezuelaBaylor Med Sch, Div Nephrol, Houston, TX 77030, USAInst Nacl Cardiol, Div Nephrol, Mexico City, DF, MexicoRodriguez-Iturbe, B, Apartado Postal 1430, Maracaibo 4001 A, Venezuela TI - Mycophenolate mofetil treatment in conditions different from organ transplantation MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Surgery;Transplantation U5 - J;Article AV - English IS - 0041-1345 UR - ISI:000179162200007 L2 - SALT-SENSITIVE HYPERTENSION; ISCHEMIA-REPERFUSION INJURY; SYSTEMIC-LUPUS-ERYTHEMATOSUS; ANGIOTENSIN-II EXPOSURE; STEROID-SPARING AGENT; ACTIVE CROHNS-DISEASE; RAT REMNANT KIDNEY; WEGENERS-GRANULOMATOSIS; HEYMANN NEPHRITIS; RENAL INJURY SO - Transplantation Proceedings 2002 ;34(7):2523-2526 6519 UI - 10112 AU - Quiroz Y AU - Pons HA AU - Herrera-Acosta J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - Univ Zulia, Univ Hosp, INBIOMED Fundacite, Maracaibo 4011, Zulia, VenezuelaInst Nacl Cardiol I Chavez, Mexico City, DF, MexicoBaylor Coll Med, Houston, TX 77030, USA TI - Short-term angiotensin II (AII) infusion in the rat is associated with activation of NF-kappa B MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757500726 SO - Journal of the American Society of Nephrology 2002 ;13():147A-147A 6520 UI - 10683 AU - Rabinovich V AU - Schulze BW AU - Tarkhanov N AD - IPN, ESIME, Dept Telecommun, Unidad Zacatenco, Mexico City 07738, DF, MexicoUniv Potsdam, Inst Math, D-14415 Potsdam, GermanyRussian Acad Sci, Inst Phys, Krasnoyarsk 660036, RussiaRabinovich, V, IPN, ESIME, Dept Telecommun, Unidad Zacatenco, Av IPN,S-N Ed 1, Mexico City 07738, DF, Mexico TI - C*-algebras of singular integral operators in domains with oscillating conical singularities AB - For a domain D subset of R-n with singular points on the boundary, we consider a C*-algebra A(D; w) of operators acting in the weighted space L-2(D, \w\(2)dx). It is generated by the operators of multiplication by continuous functions on D and the operators chiD F-1 sigma F chiD where a is a homogeneous function. We show that the techniques of limit operators apply to define a symbol algebra for A(D; w). When combined with the local principle, this leads to describing the Fredholm operators in A(D; w) MH - Germany MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-2611 UR - ISI:000176918400005 SO - Manuscripta Mathematica 2002 ;108(1):69-90 6521 UI - 9523 AU - Racagni-Di Palma G AU - Brito-Argaez L AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, MexicoUniv Nacl Rio Cuarto, Dept Mol Biol, RA-5800 Rio Cuarto, Cordoba, ArgentinaHernandez-Sotomayor, SMT, Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Calle 43 130,Col Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Phosphorylation of signaling phospholipids in Coffea arabica cells AB - Membrane preparations of Coffea arabica suspension cells were incubated in the presence of [P-32]gamma-ATP. After lipid extraction and separation by thin layer chromatography, the following phosphorylated lipids were detected: phosphatidylinositol 4,5 bis-phosphate (PtdIns4,5P(2)), lyso-phosphatidylinositol 4-phosphate (LPtdIns4P), phosphatidylinositol 4-phosphate (Ptdlns4P), diacylglycerol pyrophosphate (DGPP), lyso-phosphatidic acid (LPA) and phosphatidic acid (PA). This suggests the presence of phosphatidylinositol (EC 2.7.1.67), phosphatidylinositol 4 phosphate (EC 2.7.1.68), diacylglycerol (EC 2.7.1.107) and monoacylglycerol (EC 2.1.1.94) kinases. The activities of these lipid kinases changed during the culture period of the C. arabica cells reaching peak at day 7 of culture; however, enzymatic activities were very low before and after day 7. The behavior of these lipid kinases in the presence of their respective substrates and exogenous substrates such as ATP was characterized. The apparent K-m values for ATP of all the lipid kinase activities were lower than 30 muM. All kinase activities assayed were totally dependent on the presence of Mg2+ and were unable to use Mn2+ or Ca2+ which produced a strong inhibition of all the lipid kinase activities. By using polyclonal antibodies against PtdIns 4-kinase and PtdInsP 5-kinase, we were able to identify at least two putative isoforms for the PtdIns 4-kinase and one for the PtdInsP 5-kinase. In both cases, the correlation of the amount of these proteins with their respective kinase activities depended on the culture cycle. The present work describes for the first time the characterization of the lipid kinases of C. arabica suspension cells, and the correlation of these activities with the culture cycle. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Argentina MH - Mexico|Yucatan PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0981-9428 UR - ISI:000179850800001 L2 - Coffea arabica;lipid kinases;phospholipids;signal transduction;PHOSPHATIDYLINOSITOL 4-KINASE; PHOSPHOINOSITIDE KINASES; SACCHAROMYCES-CEREVISIAE; PHOSPHATIDIC-ACID; PLASMA-MEMBRANES; CULTURE CELLS; TOBACCO CELLS; PLANT-CELLS; PURIFICATION; POLYPHOSPHOINOSITIDES SO - Plant Physiology and Biochemistry 2002 ;40(11):899-906 6522 UI - 11090 AU - Radabaugh TR AU - Sampayo-Reyes A AU - Zakharyan RA AU - Aposhian HV AD - Univ Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USAIMSS, Ctr Invest Biomed Noreste, Monterrey, Nuevo Leon, MexicoAposhian, HV, Univ Arizona, Dept Mol & Cellular Biol, 1007 E Lowell,Life Sci S Bldg,Room 444,POB 210106, Tucson, AZ 85721 USA TI - Arsenate reductase II. Purine nucleoside phosphorylase in the presence of dihydrolipoic acid is a route for reduction of arsenate to arsenite in mammalian systems AB - An arsenate reductase has been partially purified from human liver using ion exchange, molecular exclusion, hydroxyapatite chromatography, preparative isoelectric focusing, and electrophoresis. When SDS-beta-mercaptoethanol-PAGE was performed on the most purified fraction, two bands were obtained. One of these bands was a 34 kDa protein. Each band was excised from the gel and sequenced by LC-MS/MS, and sequest analyses were performed against the OWL database SWISS-PROT with PIR. Mass spectra analysis matched the 34 kDa protein of interest with human purine nucleoside phosphorylase (PNP). The peptide fragments equal to 40.1% of the total protein were 100% identical to the corresponding regions of the human purine nucleoside phosphorylase. Reduction of arsenate in the purine nucleoside arsenolysis reaction required both PNP and dihydrolipoic acid (DHLP). The PNP rate of reduction of arsenate with the reducing agents GSH or ascorbic acid was negligible compared to that with the naturally occurring dithiol DHLP and synthetic dithiols such as BAL (British anti-lewisite), DMPS (2,3-dimereapto-1-propanesulfonate), or DTT (alpha-dithiothreltol). The arsenite production reaction of thymidine phosphorylase had approximately 5% of such PNP activity. Phosphorylase b was inactive. Monomethylarsonate (MMA(V)) was not reduced by PNP. The experimental results indicate PNP is an important route for the reduction of arsenate to arsenite in mammalian systems MH - USA MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 48 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Toxicology U5 - J;Article AV - English IS - 0893-228X UR - ISI:000175735400012 L2 - MONOMETHYLARSONOUS ACID; LIPOIC ACID; ENZYMATIC METHYLATION; PARTIAL-PURIFICATION; LIVER; METABOLISM; TOXICITY; RAT; HEPATOCYTES; TRIVALENT SO - Chemical Research in Toxicology 2002 ;15(5):692-698 6523 UI - 9616 AU - Radford DC AU - Baktash C AU - Galindo-Uribarri A AU - Gross CJ AU - Lewis TA AU - Mueller PE AU - Hausladen PA AU - Shapira D AU - Stracener DW AU - Yu CH AU - Fuentes B AU - Padilla E AU - Hartley DJ AU - Barton CJ AU - Caprio M AU - Zamfir NV AD - Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAOak Ridge Inst Sci & Educ, Oak Ridge, TN 37831, USAUNAM, Fac Ciencias, Mexico City, DF, MexicoUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAYale Univ, Wright Nucl Struct Lab, New Haven, CT 06520, USARadford, DC, Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USA TI - Physics with heavy neutron-rich RIBs at the HRIBF AB - The Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory has recently produced the world's first post-accelerated beams of heavy neutron-rich nuclei. The first experiments with these beam are described, and the results discussed. B(E2; 0(+) --> 2(+)) values for neutron-rich Sn-121,Sn-128 and Te-132,Te-134,Te-136 isotopes have been measured by Coulomb excitation in inverse kinematics. The results for Te-132 and Te-134 (N = 80, 82) show excellent agreement with systematics of lighter Te isotopes, but the B(E2) value for Te-136 (N = 84) is unexpectedly small. Single-neutron transfer reactions with a Te-134 beam on Be-nat and C-13 targets at energies just above the Coulomb barrier have also been studied MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000179688500036 SO - European Physical Journal A 2002 ;15(1-2):171-173 6524 UI - 11107 AU - Radford DC AU - Baktash C AU - Beene JR AU - Fuentes B AU - Galindo-Uribarri A AU - Gross CJ AU - Hausladen PA AU - Lewis TA AU - Mueller PE AU - Padilla E AU - Shapira D AU - Stracener DW AU - Yu CH AU - Barton CJ AU - Caprio MA AU - Coraggio L AU - Covello A AU - Gargano A AU - Hartley DJ AU - Zamfir NV AD - Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoOak Ridge Inst Sci & Educ, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06520, USAUniv Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, ItalyIst Nazl Fis Nucl, I-80126 Naples, ItalyUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAClark Univ, Worcester, MA 01610, USARadford, DC, Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USA TI - Coulomb excitation of radioactive Te-132,Te-134,Te-136 beams and the low B(E2) of Te-136 AB - The B(E2;0(+)-->2(+)) values for the first 2(+) excited states of neutron-rich Te-132,Te-134,Te-136 have been measured using Coulomb excitation of radioactive ion beams. The B(E2) values obtained for Te-132,Te-134 are in excellent agreement with expectations based on the systematics of heavy stable Te isotopes, while that for Te-136 is unexpectedly small. These results are discussed in terms of proton-neutron configuration mixing and shell-model calculations using realistic effective interactions MH - Italy MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 53 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000175709100008 L2 - SHELL-MODEL; SN-132; NUCLEI SO - Physical Review Letters 2002 ;88(22): 6525 UI - 9938 AU - Raga AC AU - Dal Pino EMD AU - Noriega-Crespo A AU - Mininni PD AU - Velazquez PF AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo, BrazilCALTECH, SIRTF Sci Ctr, IPAC 100 22, Pasadena, CA 91125, USAUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaRaga, AC, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70, Mexico City 04510, DF, Mexico TI - Jet/cloud collision, 3D gasdynamic simulations of HH 110 AB - We present 3D, gasdynamic simulations of jet/cloud collisions, with the purpose of modelling the HH 270/110 system. From the models, we obtain predictions of Halpha and H-2 1-0 s(1) emission line maps, which qualitatively reproduce some of the main features of the corresponding observations of HH 110. We find that the model that better reproduces the observed structures corresponds to a jet that was deflected at the surface of the cloud similar to 1000 yr ago, but is now boring a tunnel directly into the cloud. This model removes the apparent contradiction between the jet/cloud collision model and the lack of detection of molecular emission in the crossing region of the HH 270 and HH 110 axes MH - Argentina MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 35 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000177868700026 L2 - ISM : Herbig-Haro objects;ISM : jets and outflows;ISM : kinematics and dynamics;ISM : individual (HH 110);shock waves;MOLECULAR CLOUDS; STEADY STRUCTURE; HH-110; JETS; CORE; STRATIFICATION; EVOLUTION; HYDROGEN; SHOCKS SO - Astronomy & Astrophysics 2002 ;392(1):267-276 6526 UI - 11911 AU - Raga AC AU - Noriega-Crespo A AU - Reipurth B AU - Garnavich PM AU - Heathcote S AU - Bohm KH AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCALTECH, Ctr Infrared Proc & Anal, SIRTF Sci Ctr, Pasadena, CA 91125, USAUniv Hawaii, Inst Astron, Honolulu, HI 96822, USAUniv Notre Dame, Ctr Astrophys, Notre Dame, IN 46556, USACerro Tololo Interamer Observ, Natl Opt Astron Observ, La Serena, ChileUniv Washington, Dept Astron, Seattle, WA 98195, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoRaga, AC, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Kinematics of the HH 111 jet from the space telescope imaging spectrograph AB - We present a long-slit spectrum of the Herbig-Haro object HH 111, obtained with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. This spectrum has a spectral resolution of approximate to50 km s(-1), so it gives a good picture of the kinematical properties of the observed object at very high angular resolution. We find that some of the knots along the jet are associated with sudden drops in the radial velocity (modulus), confirming that the emission from the knots is formed in shocks. We interpret the observed position-velocity diagrams in terms of a model of a jet from a variable source, and we attempt to carry out a reconstruction of the ejection velocity variability necessary for reproducing the observed kinematical structure MH - Chile MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173507400008 L2 - ISM : Herbig-Haro objects;ISM : individual (HH 111);ISM : jets and outflows;ISM : kinematics and dynamics;shock waves;MULTIPLE OUTFLOW EPISODES; STELLAR JETS; YOUNG STARS; HH-111 JET; VARIABILITY; SIMULATIONS; BULLETS; MODELS; FLOWS SO - Astrophysical Journal 2002 ;565(1):L29-L33 6527 UI - 10177 AU - Rakheja S AU - Romero JA AU - Lozano A AU - Liu PJ AU - Ahmed AKW AD - Concordia Univ, CONCAVE Res Ctr, Montreal, PQ, CanadaMexican Transport Inst, Queretaro, MexicoRakheja, S, Concordia Univ, CONCAVE Res Ctr, Montreal, PQ, Canada TI - Assessment of open-loop rollover control of articulated vehicles under different manoeuvres AB - In this paper, a comprehensive three-dimensional heavy vehicle model is developed to investigate the effectiveness of an open-loop roll instability control. The steering system compliance, roll steer, bump steer, Ackerman steer and wrap steer are incorporated in the vehicle model, along with a comprehensive tyre model and ABS algorithm. Time delays due to a driver's reaction and the transportation lag of the braking system are characterized by a variable called the reaction delay. The rollover indicators in terms of roll safety factor, tractor and trailer lateral accelerations and roll angles, and the rearmost axle roll angle are investigated for their effectiveness for open-loop roll stability control in various cornering and evasive manoeuvres, road conditions, braking efforts, and different reaction delays MH - Canada MH - Mexico|Queretaro PB - GENEVA AEROPORT: INDERSCIENCE ENTERPRISES LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Transportation Science & Technology U5 - J;Article AV - English IS - 1351-7848 UR - ISI:000178362100002 L2 - anti-lock brake system;driver reaction delays;open-loop rollover control;potential rollover measures;roll dynamics;roll safety factor;transport lag SO - Heavy Vehicle Systems-International Journal of Vehicle Design 2002 ;9(3):204-222 6528 UI - 11941 AU - Ramirez-Aguilar M AU - Cicero-Fernandez P AU - Winer AM AU - Romieu I AU - Meneses-Gonzalez F AU - Hernandez-Avila M AD - Univ Calif Los Angeles, Sch Publ Hlth, Dept Environm Hlth Sci, Los Angeles, CA 90024, USAPan Amer Hlth Org, Mexico City, DF, MexicoCtr Invest Salud Poblac, Inst Nacl Salud Publ, Cuernavaca, Morelos, MexicoRamirez-Aguilar, M, Sch Publ Hlth, Natl Inst Publ Hlth, 655 Av Univ,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Measurements of personal exposure to nitrogen dioxide in four Mexican cities in 1996 AB - Nitrogen dioxide is a ubiquitous pollutant in urban areas. Indoor NO2 concentrations are influenced by penetration of outdoor concentrations and by indoor sources. The objectives of this study were to evaluate personal exposure to NO2, taking into account human time-activity patterns in four Mexican cities. Passive filter badges were used for indoor, outdoor, and personal NO2 measurements over 48 hr and indoor workplace measurements over 16 hr. Volunteers completed a questionnaire on exposure factors and a time-activity diary during the sample period. An unpaired t test, an analysis of variance (ANOVA), and a linear regression were performed to compare differences among cities and mean personal NO2 concentrations involving housing characteristics, as well as to determine which variables predicted the personal NO2 concentration. Sampling periods were in April, May, and June 1996 in Mexico City, Guadalajara, Cuernavaca, and Monterrey. All 122 volunteers in the study were working adults, with a mean age of 34 (SD +/- 7.38); 64% were female, and the majority worked in public offices and universities. The highest NO2 concentrations were found in Mexico City (36 ppb for outdoor, 57 ppb for indoor, and 39 ppb for personal concentration) and the lowest in Monterrey (19 ppb for outdoor, 24 ppb for indoor, and 24 ppb for personal concentration). Significant differences in NO2 concentrations were found among the cities in different microenvironments. During the sampling period, volunteers spent 85% of their time indoors. The highest personal NO2 concentration was found when volunteers kept their windows closed (p = 0.03). In the regression model adjusted by city and gender, the best predictors of personal NO2 concentration were outdoor levels and time spent outdoors (R-2 = 0.68). These findings suggest that outdoor NO2 concentrations were an important influence on the personal exposure to NO2, due to the specific characteristics and personal behavior of the people in these Mexican cities MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000173381000006 L2 - RESPIRATORY SYMPTOMS; NO2 EXPOSURE; CHILDREN; ASSOCIATION; CITY SO - Journal of the Air & Waste Management Association 2002 ;52(1):50-57 6529 UI - 10618 AU - Ramirez-Amador V AU - Esquivel-Pedraza L AU - Lozada-Nur F AU - De la Rosa-Garcia E AU - Volkow-Fernandez P AU - Suchil-Bernal L AU - Mohar A AD - Univ Autonoma Metropolitana Xochimilco, Mexico City 04960, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Calif San Francisco, San Francisco, CA 94143, USAInst Nacl Cancerol, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoRamirez-Amador, V, Camino Sta Teresa 277-9, Mexico City 14010, DF, Mexico TI - Intralesional vinblastine vs. 3% sodium tetradecyl sulfate for the treatment of oral Kaposi's sarcoma. A double blind, randomized clinical trial AB - In this double-blind, randomized trial. we compared the clinical efficacy of intralesional vinblastine (VNB) and sodium tetradecyl sulfate (STS) in the treatment of oral Kaposi's sarcoma (OKS). Subjects with OKS were randomly assigned to receive a single intralesional injection of either VNB or STS, at a standard dose (0.2 mg/cm(2)). Differences were evaluated by the Mann Whitney U and Fisher's exact tests. Sixteen HIV-infected patients were included, eight received VNB and eight received STS. clinical response was evaluated at days 7, 14, and 28 following treatment. Tumor size reduction was 0.68 and 0.61 cm in the VNB and STS groups, respectively (P=0.80). Two VNB patients had complete or partial response whereas four STS subjects had partial responses (P=0.61). Patients in both groups experienced minimal toxicity. We conclude that intralesional vinblastine or STS are adequate for the management of OKS. The benefits of STS are its low cost and ease of use. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Oncology;Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0964-1955 UR - ISI:000176941900008 L2 - AIDS;Kaposi's sarcoma;vinblastine;sodium tetradecyl sulfate;oral;ACQUIRED-IMMUNODEFICIENCY-SYNDROME; DNA-SEQUENCES; HIV-INFECTION; AIDS PATIENTS; HUMAN-HERPESVIRUS-8; VIRUS; EPIDEMIOLOGY; HERPESVIRUS-8; SCLEROTHERAPY; MANAGEMENT SO - Oral Oncology 2002 ;38(5):460-467 6530 UI - 10843 AU - Ramirez-Bautista A AU - Ramos-Flores O AU - Sites JW AD - Univ Nacl Autonoma Mexico, FES Iztacala, Ecol Lab, Unidad Biol Tecnol & Prototipos, Tlalnepantla 54090, Edo Mexico, MexicoBrigham Young Univ, Dept Zool, Provo, UT 84602, USARamirez-Bautista, A, Univ Nacl Autonoma Mexico, FES Iztacala, Ecol Lab, Unidad Biol Tecnol & Prototipos, Av Barrios S-N,AP 314, Tlalnepantla 54090, Edo Mexico, Mexico TI - Reproductive cycle of the spiny lizard Sceloporus jarrovii (Sauria : Phrynosomatidae) from north-central Mexico AB - We studied the reproductive cycle of Sceloporus "jarrovii" from a temperate environment of the Sierra Madre Oriental in Mexico. Males reached sexual maturity at a smaller snout vent length (SVL; 46 mm) than females (60 mm). Reproductive activity of both sexes was asynchronous, similar to other species inhabiting montane zones. Testes increased in size from June to November and declined rapidly in November. Vitellogenesis occurred from August to October, with ovulation occurring between November and December. Embryonic development was observed from December to early May. There was a significant positive correlation between litter size and female SVL. The reproductive cycle of S. 'jarrovii" is similar to other montane species of several families (Anguidae, Scincidae, Phrynosomatidae). Vitellogenesis, ovulation, and gestation time are shorter in northern (Arizona) than southern populations (Mexico). Females from northern populations are larger in SVL and have larger litter sizes than southern populations. Our study suggests that the montane environment (cool temperatures, short growing season, rainfall during the summer) of S. 'jarrovii" has played a role in the evolution of a set of reproductive characteristics shared by evolutionarily distant viviparous lizard species inhabiting the montane zone MH - Mexico|Estado De Mexico MH - USA PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 8 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000176456800012 L2 - HIGH ELEVATION; GRAMMICUS-MICROLEPIDOTUS; IGUANID LIZARDS; EUMECES-COPEI; EVOLUTION; VIVIPARITY; SIZE; CONSTRAINTS; DEMOGRAPHY; DIMORPHISM SO - Journal of Herpetology 2002 ;36(2):225-233 6531 UI - 10243 AU - Ramirez-Garcia P AU - Terrados J AU - Ramos F AU - Lot A AU - Ocana D AU - Duarte CM AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoCSIC, Ctr Estudios Avanzados Blanes, Blanes 17300, SpainCSIC, UIB, Inst Mediterraneo Estudios Avanzados, Grp Oceanog Interdisciplinaria, Esporales 07190, Malloraca, SpainRamirez-Garcia, P, Univ Nacl Autonoma Mexico, Inst Biol, Apdo Postal 70-233, Mexico City 04510, DF, Mexico TI - Distribution and nutrient limitation of surfgrass, Phyllospadix scouleri and Phyllospadix torreyi, along the Pacific coast of Baja California (Mexico) AB - Three field surveys and an extensive review of surfgrass (Phyllospadix) specimens from herbarium collections in USA and Mexico were performed to delimit the geographical distribution of Phyllospadix scouleri and Phyllospadix torreyi along the coasts of Baja California (Mexico) which showed that both species had the same distribution in the peninsula with a southern limit at 24degrees31'N. Cover estimates along three to eight transects laid in the lower intertidal and upper subtidal of three locations in Baja California indicated that P. scouleri occurs shallower than P. torreyi when coexisting. A preliminary, short-term experimental increase of nutrient availability in the water column at one of the study sites suggested that the biomass and growth rates of P. torreyi were more limited by the availability of nutrients than those of P. scouleri. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000178231500003 L2 - geographical range;depth distribution;nutrient limitation;seagrass;Phyllospadix spp.;Mexico;SEAGRASS PHYLLOSPADIX; ORGANISMS; BIOMASS SO - Aquatic Botany 2002 ;74(2):121-131 6532 UI - 11720 AU - Ramirez-Herrera MT AU - Orozco JJZ AD - Calif State Univ Long Beach, Dept Geol Sci, Long Beach, CA 90840, USAUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoRamirez-Herrera, MT, Calif State Univ Long Beach, Dept Geol Sci, 1250 Bellflower Blvd, Long Beach, CA 90840 USA TI - Coastal uplift and mortality of coralline algae caused by a 6.3Mw earthquake, Oaxaca, Mexico AB - Mortality of coralline algae proved to be a useful indicator of rapid coastal uplift produced by a strong shallow-focus earthquake. Because these encrusting algae can not survive desiccation, they can provide estimates of coseismic uplift. After the Mw 6.3, February 2, 1998, Puerto Angel earthquake, southern Mexico, a bleached white belt appeared along the Puerto Angel coast. We measured this white belt two weeks and, again, two months after the earthquake, when coralline algae had experienced low tide sequences. Detailed measurements at 15 sites allowed us to determine the extent of the uplifted coastal zone and to reconstruct the amount of coseismic uplift along the Puerto Angel coast. The width of the dead algal belt varied from 0.07 to 0.50 m. The largest observed values are related to local parameters (exposition to wave splash, geometric disposition, and morphology of the coast) that account for an amplification of the width of the dead algal belt. A detailed survey indicates that coastal coseismic uplift was recorded for ca. 70 km along the Oaxaca coast from Puerto Angel, which is near the epicentral area. The maximum coseismic uplift recorded 0.3 m at La Boquilla and Ixtacahuite, near Puerto Angel, and at Agua Blanca MH - USA MH - Mexico|Distrito Federal PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000174006900007 L2 - coseismic uplift;tectonic deformation;crustose algae;SEISMICITY; ECOLOGY SO - Journal of Coastal Research 2002 ;18(1):75-81 6533 UI - 10790 AU - Ramirez-Vargas E AU - Medellin-Rodriguez FJ AU - Navarro-Rodriguez D AU - vila-Orta CA AU - Solis-Rosales SG AU - Lin JS AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUASLP, FCQ, CIEP, San Luis Potosi 78210, MexicoOak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831, USARamirez-Vargas, E, Ctr Invest Quim Aplicada, Blvd Enrique Reyna 140, Saltillo 25100, Coahuila, Mexico TI - Morphological and mechanical properties of polypropylene [PP]/poly(ethylene vinyl acetate) [EVA] blends. II: Polypropylene-(ethylene-propylene) heterophasic copolymer [PP-EP]/EVA systems AB - Morphological characteristics and mechanical properties of PP-EP/EVA blends were studied and compared to those of PP/EVA previously reported. For the PP-EP/EVA blends, interfacial interactions in amorphous zones, which were associated with shifts in T-g, were well defined compared to those of PP/EVA blends, although the nature of crystalline zones was similar for both systems. At EVA concentrations up to 20%, the elongation at break and impact strength slightly increased in both systems. However, PP-EP/EVA displayed higher values of these properties compared with PP/EVA. At high EVA concentrations (above 20%), the indicated properties were enhanced in both polymeric systems, and the same proportional behavior was maintained. The decrease in tensile strength of PP-EP/EVA was not as marked as in PP/EVA with the addition of EVA, and it remained below PP/EVA at high EVA concentrations. The improvement in properties of PP-EP/EVA was attributed to favorable interactions between the ethylene groups contained in both copolymers. These interactions rendered a high degree of compatibility between the PP-EP and EVA components MH - Mexico|Coahuila MH - Mexico|San Luis Potosi MH - USA PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0032-3888 UR - ISI:000176645900020 L2 - ANGLE X-RAY; LAMELLAR 2-PHASE SYSTEMS; TRIPLE MELTING BEHAVIOR; SCATTERING; ETHYLENE; CRYSTALLIZATION SO - Polymer Engineering and Science 2002 ;42(6):1350-1358 6534 UI - 9683 AU - Ramirez FD AU - Varbanov S AU - Cecile C AU - Muller G AU - Fatin-Rouge N AU - Scopelliti R AU - Bunzli JCG AD - Swiss Fed Inst Technol, Inst Mol & Biol Chem, CH-1015 Lausanne, SwitzerlandInst Nacl Invest Nucl, Dept Quim, Mexico City 52045, DF, MexicoBulgarian Acad Sci, Inst Polymer, BG-1113 Sofia, BulgariaBunzli, JCG, Swiss Fed Inst Technol, Inst Mol & Biol Chem, BCH 1402, CH-1015 Lausanne, Switzerland TI - A p-tert-butylcalix[6]arene bearing phosphinoyl pendant arms for the complexation and sensitisation of lanthanide ions AB - The new lower rim functionalised macrocycle 5,11,17,23,29,35-hexa-tert-butyl-37,38,39,40,41,42-hexakis(dimethylphosp hinoylmethoxy)calix[6]arene (B(6)bL(6)) has been synthesised. Temperature dependent H-1 and P-31 NMR studies indicate a mixture of conformers with a time-averaged C-6v, symmetry at 405 K in dmso-d(6); DeltaGdouble dagger values for conformational interconversion processes are equal to 68(1) and 75(2) kJ mol(-1) and reveal a semi-flexible macrocycle with alternate in-out cone conformation, a fact confirmed by molecular mechanics and dynamics calculations. B(6)bL(6) crystallises as a dimer where the two calixarenes are linked through hydrogen bonding and surrounded by water and toluene molecules in the lattice. UV-Vis spectrophotometric titration of B(6)bL(6) with La(III) in acetonitrile yields stability constants logbeta(1) = 9.8 and logbeta(2) = 19.6 for the 1 : 1 and 1 : 2 (Ln : B(6)bL(6)) species, respectively. The corresponding complexes with La, Eu, Gd and Tb have been isolated and characterised. Lifetime determinations of the Eu(III) and Tb(III) complexes in acetonitrile solution are consistent with no or little interaction of water molecules in the inner co-ordination sphere. The new ligand sensitises reasonably well the luminescence of the Tb(III) (Q(abs) = 4.8%, tau(f) = 2.1 ms, 1 : 1 complex) and Eu(III) (Q(abs) = 2.5%, tau = 2.0 ms, 1 : 2 complex) ions MH - Bulgaria MH - Mexico|Distrito Federal MH - Switzerland PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1472-7773 UR - ISI:000179551300029 L2 - MOLECULAR-STRUCTURE; NMR-SPECTROSCOPY; CALIXARENES; CALIX<4>ARENES; EXTRACTION; RIM; PARA-TERT-BUTYLCALIX<6>ARENE; CALIX<6>ARENES; CONFORMATION; SEPARATIONS SO - Journal of the Chemical Society-Dalton Transactions 2002 ;(23):4505-4513 6535 UI - 12008 AU - Ramirez I AU - Imberger J AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Western Australia, Dept Environm Engn, Water Res Ctr, Nedlands, WA 6907, AustraliaRamirez, I, Ctr Invest Cient & Educ Super Ensenada, Km 107 Carretera Tijuana, Ensenada, Baja California, Mexico TI - The numerical simulation of the hydrodynamics of Barbamarco Lagoon, Italy AB - A three-dimensional numerical model in finite differences was used to simulate the transport and mixing in Barbamarco Lagoon, Italy. The field data for the boundary conditions and for the conditions within the lagoon are described in an earlier paper by Ran-drez and Imberger [Hydrodynamics of a shallow lagoon: Barbamarco Lagoon, Italy, submitted, 2000]. In general, the model reproduced the main features of the circulation and stratification regimes. (C) 2002 IMACS. Published by Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000173209600023 L2 - SHALLOW-WATER FLOW SO - Applied Numerical Mathematics 2002 ;40(1-2):273-289 6536 UI - 10572 AU - Ramirez J AU - Uresti R AU - Tellez S AU - Vazquez M AD - Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Reynosa 88700, Tamaulipas, MexicoUniv Santiago de Compostela, Area Tecnol Alimentos, Dept Quim Analit, Escuela Politecn Super, Lugo 27002, SpainRamirez, J, Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Apdo Postal 1015, Reynosa 88700, Tamaulipas, Mexico TI - Using salt and microbial transglutaminase as binding agents in restructured fish products resembling hams AB - Restructured products were obtained from fish paste of silver carp (Hypophthalmichthys molitrix) by massaging and cooking in ham presses. Assayed were 3 levels of salt (0 as control, 1, or 2%) and 3 levels of microbial transglutaminase (MTGase). Changes on solubility of pastes, mechanical properties, WHC, and SDS-PAGE of the cooked product were evaluated. MTGase needed the addition of NaCl to improve the mechanical properties of these restructured products. Better textural properties were obtained with 2% NaCl. Adding 0.3% of MTGase and 1% NaCl obtained a low-salt, homogenous restructured meat block with 2773 g hardness, 29106 g/cm gel strength, 0.233 cohesiveness, and 11.6% extracted water MH - Mexico|Tamaulipas MH - Spain PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 15 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000177064100034 L2 - restructured;transglutaminase;binding;salt;fish;TWITCH RABBIT MUSCLES; HEAT-INDUCED GELATION; SURIMI; MYOSIN; QUALITY; BEEF SO - Journal of Food Science 2002 ;67(5):1778-1784 6537 UI - 12208 AU - Ramirez JA AU - Barrera M AU - Morales OG AU - Vazquez M AD - Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Reynosa 88700, Tamaulipas, MexicoUniv Autonoma Tamaulipas, Inst Ecol & Alimentos, Cd Victoria, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Dpto Quim Anailit, Lugo 27002, SpainRamirez, JA, Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Apdo Postal 1015, Reynosa 88700, Tamaulipas, Mexico TI - Effect of xanthan and locust bean gums on the gelling properties of myofibrillar protein AB - Protein-hydrocolloids interactions play an important role on textural and mechanical properties of foods. The objective of this work was to evaluate the effect of xanthan and locust bean gums on the gelling ability of myofibrillar proteins at different levels of calcium addition. Surimi was supplemented with xanthan (X) and locust bean (LB) gums at different X/LB ratios: 0.00/1.00, 0.25/0.75, 0.50/0.50, 0.75/0.25, 1.00/0.00. Calcium chloride was added at 0.2 or 0.4%. Changes on shear stress and shear strain at the failure of surimi gels were evaluated. Addition of 0.4% of calcium chloride improved the mechanical properties. Locust bean added alone negatively affected the shear stress of gels. Xanthan at levels of 0.75 and 1.00 had a disruptive effect on the gelling forming ability. This negative effect was partially inhibited with addition of 0.4% of calcium chloride. A profitable effect was found when a X/LB ratio of 0.2510.75 was added, with an increase on the mechanical properties of surimi gels. Xanthan and locust bean gums could be employed to elaborate surimi gels when added at a X/LB ratio of 0.25/0.75. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000172637800002 L2 - xanthan;locust bean;surimi;myofibrillar protein;calcium;SURIMI; GELS; TRANSGLUTAMINASE; MIXTURES; CALCIUM SO - Food Hydrocolloids 2002 ;16(1):11-16 6538 UI - 9727 AU - Ramirez LE AU - Castro M AU - Mendez M AU - Lacaze J AU - Herrera M AU - Lesoult G AD - CINVESTAV, IPN, Ctr Invest & Estudios Avanzados, Saltillo 25000, Coahuila, MexicoUPS, INPT, CNRS, UMR 5085,CIRIMAT, F-31077 Toulouse 4, FranceENSMN, CNRS, UMR 7584, Lab Sci & Genie Mat Met, F-54042 Nancy, FranceCastro, M, CINVESTAV, IPN, Ctr Invest & Estudios Avanzados, Carr Saltillo Monterrey Km 13,A Postal 663, Saltillo 25000, Coahuila, Mexico TI - Precipitation path of secondary phases during solidification of the Co-25.5%Cr-5.5%Mo-0.26%C alloy AB - The solidification of the alloy ASTM F-75 ends with sigma phase formation instead of M7C3 carbide as presumed from literature. The M23C6 carbide observed in cast specimens precipitates from the sigma phase (a) according to the global reaction sigma + C --> M23C6 over the range 1403-1303 K. Additionally, lamellar carbides appear below 1262 K for cooling rates lower than 35 K/min. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Coahuila PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000179429700004 L2 - solidification;biomaterials;casting;carbides;CARBIDE SO - Scripta Materialia 2002 ;47(12):811-816 6539 UI - 10341 AU - Ramirez MO AU - Bausa LE AU - Lira A AU - Caldino U AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoRamirez, MO, Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain TI - Photoluminescence of Bi12SiO20 : Er3+ excited in the commercial laser diode emission region MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000177777300013 L2 - STATE ABSORPTION; UP-CONVERSION; CRYSTALS SO - Journal of Materials Science Letters 2002 ;21(19):1517-1519 6540 UI - 10580 AU - Ramirez MO AU - Lira A AU - Romero JJ AU - Bausa LE AU - Caldino U AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoRamirez, MO, Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain TI - Up-conversion luminescence in the Bi12SiO20 : Er3+ photo-refractive crystal AB - Up-converted luminescence from Er(3+)doped Bi12SiO20 photo-refractive crystal has been studied at room temperature under continuous wave laser excitation. Green and red up-converted emissions are observed under excitation within the I-4(11/2) state (similar to980 nm). In addition, near infrared up-converted emissions at around 805 and 860 nm have also been observed. All these emissions can be related the transitions H-2(11/2), S-4(3/2)-->I-4(15/2) (green), F-4(9/2)-->I-4(15/2) (red) and H-2(11/2), S-4(3/2)-->I-4(13/2) (near infrared). The intensity of these emissions versus the excitation power has been studied and the mechanism responsible for the up-conversion processes are discussed MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000177216900013 L2 - up-conversion;optical spectroscopy;Er3+;ENERGY-TRANSFER SO - Ferroelectrics 2002 ;272():2061-2066 6541 UI - 10638 AU - Ramirez MO AU - Lira A AU - Garcia JAS AU - Bausa LE AU - Caldino U AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoRamirez, MO, Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain TI - Optical spectroscopy of Er3+-doped Bi12SiO20 piezoelectric crystal AB - Photoluminescence of Er3+ ions in a Bi12SiO20 crystal is investigated under excitation in the near infrared region (I-4(15/2)-->I-4(9/2) transition) at low temperature. Two non-equivalent Er3+ centers are detected in the crystal. Besides the one photon infrared emission (I-4(11/2)-->I-4(15/2)), up-converted luminescence in the green (S-4(3/2)-->I-4(15/2)) and red (F-4(9/2)-->I-4(15/2)) spectral regions and down-converted emission (S-4(3/2)-->I-4(13/2)) in the near infrared region have been observed and resolved for each type of Er center. The mechanisms responsible for the conversion process are analyzed. The position of the Stark energy levels are obtained for each center for different Er3+ multiplets. (C) 2002 Elsevier Science B V All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000177023400053 L2 - Er3+;BSO;photoluminescence;ENERGY-TRANSFER SO - Journal of Alloys and Compounds 2002 ;341(1-2):275-279 6542 UI - 11133 AU - Ramirez SI AU - Coll P AU - Da Silva A AU - Navarro-Gonzalez R AU - Lafait J AU - Raulin F AD - Univ Paris 07, UMR 7583, Lab Interuniv Syst Atmospher, Paris, FranceUniv Paris 12, UMR 7583, Lab Interuniv Syst Atmospher, Paris, FranceUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoUniv Paris 06, Lab Opt Solides, UMR 7601, Paris, FranceRamirez, SI, Univ Paris 07, UMR 7583, Lab Interuniv Syst Atmospher, Paris, France TI - Complex refractive index of Titan's aerosol analogues in the 200-900 nm domain AB - The main gas-phase constituents of Titan's upper atmosphere, N-2 and CH4, are photolyzed and radiolyzed by solar photons and magnetospheric electrons, respectively. The primary products of these chemical interactions evolve to heavier organic compounds that are likely to associate into the particles of haze layers that hide Titan's surface. The different theories and models that have been put forward to explain the characteristics and properties of the haze composites require a knowledge of their optical properties, which are determined by the complex refractive index. We present a new set of values for refractive index n and extinction coefficient k calculated directly from the transmittance and reflectance curves exhibited by a laboratory analogue of Titan's aerosols in the 200900 nm range. Improvements in the aerosol analogue quality have been made. The effects of variables such as the uncertainty in sample thickness, aerosol porosity, and amount of scattered light on the final n and k values are assessed and discussed. Within the studied wavelength domain, n varies from 1.53 to 1.68 and k varies from 2.62 x 10(-4) to 2.87 x 10(-2). These final n and k values should be considered as a new reference to modelers who compute the properties of Titan's aerosols in trying to explain the atmospheric dynamics and surface characteristics. (C) 2002 Elsevier Science (USA) MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0019-1035 UR - ISI:000175662000014 L2 - Titan;Titan's aerosols;tholins;complex refractive index;OPTICAL-PROPERTIES; ATMOSPHERE; SURFACE; EQUILIBRIUM; REANALYSIS; DISCHARGE; CONSTANTS; THOLINS; ALBEDO; PHASE SO - Icarus 2002 ;156(2):515-529 6543 UI - 8145 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Gil V AU - Trejo O AU - Rosas J AU - Ingelmo M AD - Hosp Clin Barcelona, Dept Atuoimmune Dis, Barcelona, SpainBUAP, Puebla, MexicoHosp Vila Joiosa, Rheumatol Unit, Alicante, Spain TI - One hundred and four patients with systemic autoimmune disease plus hepatitis C virus infection MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800100 SO - Arthritis and Rheumatism 2002 ;46(9):S66-S66 6544 UI - 8146 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Lopez-Medrano F AU - Trejo O AU - Munoz C AU - Forns X AU - Lopez-Guillermo A AU - Font J AU - Ingelmo M AD - Hosp Clin Barcelona, Dep Autoimmune Dis, Barcelona, SpainBUAP, Puebla, MexicoHosp Clin Barcelona, Dep Hepatol, Barcelona, SpainHosp Clin Barcelona, Dept Hematol, Barcelona, Spain TI - Severe autoimmune cytopenias in Treatment-NAIVE patients with hepatitis C virus infection MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800102 SO - Arthritis and Rheumatism 2002 ;46(9):S66-S66 6545 UI - 8151 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Rosas J AU - Calvo-Alen J AU - Pallares L AU - Brito MP AU - Cervera R AU - Font J AU - Ingelmo M AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainBUAP, Puebla, MexicoHosp Vila Joiosa, Rheumatol Unit, Alicante, SpainHosp Sierrallana, Santander, SpainHosp Son Dureta, Dept Internal Med, Palma de Mallorca, Spain TI - The clinical significance of circulating monoclonal immunoglobulins in primary Sjogren's syndrome MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800971 SO - Arthritis and Rheumatism 2002 ;46(9):S365-S365 6546 UI - 10295 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Cervera R AU - Filella X AU - Trejo O AU - de la Red G AU - Gil V AU - Sanchez-Tapias JM AU - Font J AU - Ingelmo M AD - Univ Autonoma Puebla, Sch Med, Rheumatol Unit, Puebla 72570, MexicoUniv Barcelona, Sch Med, Hosp Clin, IDIBAPS,Dept Biochem, Barcelona, Catalonia, SpainRamos-Casals, M, Univ Barcelona, Sch Med, Hosp Clin,IDIBAPS, Dept Autoimmune Dis,Serv Malalties Autoimmunes, C Villarroel 170, E-08036 Barcelona, Catalonia, Spain TI - Th1/Th2 cytokine imbalance in patients with Sjogren syndrome secondary to hepatitis C virus infection AB - Objective: To investigate if the serum immunologic profile, as delineated by serum circulating levels of Th1/Th2 cytokines and autoantibodies, is different in patients with Sjogren syndrome (SS) with and without hepatitis C virus (HCV) infection. Methods: This study included 20 patients with HCV-related SS and 47 consecutive patients with primary SS. All fulfilled 4 or more of the modified 1996 European criteria for SS. Serum levels of interleukin (IL)-2 (pg/mL), srIL-2 (pM), tumor necrosis factor (TNF)-alpha (pg/mL), IL-6 (pg/mL), and IL-10 (pg/mL) were determined using enzyme immunoassay. We also analyzed the following immunologic tests: anti-nuclear antibodies (ANA), anti-mitochondrial antibodies (AMA), anti-parietal cell antibodies (PCA), anti-smooth muscle antibodies (SMA), anti-liver-kidney microsome antibodies type-1 (LKM-1), anti-Ro/SS-A, anti-La/SS-B, rheumatoid factor (1317), complement factors (C3 and C4), and cryoglobulins. Results: Of the 20 patients with HCV-related SS, 18 were women and 2 men (mean age, 66 years). Patients with HCV-related SS had a different cytokine profile compared with patients with primary SS, with higher circulating levels of IL-6 (73.6 v 33.0 pg/mL, P = .045), IL-10 (6.7 v 3.1 pg/mL, P = .01), srIL-2 (124.6 v 72.7 pM, P = .001), and TNF-alpha (59.8 v 31.7 pg/mL, P = .003). The main immunologic features were ANA, detected in 75% of patients, RF in 63%, cryoglobulinemia in 50%, hypocomplementemia in 40%, SMA in 30%, PCA in 25%, anti-Ro/SS-A in 25%, AMA in 20% and anti-La/SS-B in 16%. When compared with primary SS patients, those with HCV-related SS had a higher prevalence of AMA (20% v 2%, P = .025), hypocomplementemia (40% v 11%, P = .015), and cryoglobulinemia (50% v 12%, P = .003). Conclusion: Although chronic HCV infection may mimic the main clinical, histologic and immunologic features of primary SS, patients with HCV-related SS showed some differentiated characteristics, including a predominant Th2 pattern and a higher frequency of cryoglobulinemia and hypocomplementemia (features closely related to HCV). This suggests that the SS observed in some HCV patients should be interpreted as one of the extrahepatic manifestations of chronic HCV infection MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 9 U4 - Rheumatology U5 - J;Review AV - English IS - 0049-0172 UR - ISI:000177913200006 L2 - cytokines;hepatitis C virus;Sjogren syndrome;CHRONIC VIRAL-HEPATITIS; ORGAN-SPECIFIC AUTOANTIBODIES; CHRONIC ACTIVE HEPATITIS; INTERFERON-ALPHA; EXTRAHEPATIC MANIFESTATIONS; PROSPECTIVE MULTICENTER; IMMUNOLOGICAL FEATURES; AUTOIMMUNE HEPATITIS; CELL RESPONSES; SICCA SYNDROME SO - Seminars in Arthritis and Rheumatism 2002 ;32(1):56-63 6547 UI - 10680 AU - Ramos-Casals M AU - Font J AU - Garcia-Carrasco M AU - Brito MP AU - Rosas J AU - Calvo-Alen J AU - Pallares L AU - Cervera R AU - Ingelmo M AD - Benemetria Univ Autonoma Puebla, Puebla, MexicoHosp de Son Dureta, Dept Internal Med, Palma de Mallorca, SpainHosp Sierrallana, Rheumatol Unit, Santander, SpainHosp Vila Joiosa, Rheumatol Unit, Vila Joiosa, Alacant, SpainUniv Barcelona, Hosp Clin, Serv Malalties Autoimmunes,IDIBAPS,Sch Med, Dept Autoimmune Dis,Clin Inst Infect & Immunol, E-08036 Barcelona, SpainRamos-Casals, M, Univ Barcelona, Hosp Clin, Serv Malalties Autoimmunes,IDIBAPS,Sch Med, Dept Autoimmune Dis,Clin Inst Infect & Immunol, C Villarroel 170, E-08036 Barcelona, Spain TI - Primary Sjogren syndrome - Hematologic patterns of disease expression MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 24 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000176843900004 L2 - SYSTEMIC LUPUS-ERYTHEMATOSUS; NON-HODGKINS-LYMPHOMA; TERM FOLLOW-UP; LA SS-B; IMMUNOLOGICAL CHARACTERISTICS; CLINICAL-SIGNIFICANCE; APLASTIC-ANEMIA; ANTICARDIOLIPIN ANTIBODIES; AUTOIMMUNE NEUTROPENIA; ISOTYPE DISTRIBUTION SO - Medicine 2002 ;81(4):281-292 6548 UI - 11686 AU - Ramos-de la Medina A AU - Medina-Franco H AU - Eltoum IE AU - Baquera J AU - Nuncio JF AU - Angeles A AU - Cortes R AU - Urist MM AU - Heslin MJ AD - Univ Alabama, Birmingham, AL, USANatl Inst Med Sci & Nutr, Mexico City, DF, Mexico TI - Overexpression of p53 predicts survival in primary gastrointestinal sarcomas MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Surgery U5 - J;Meeting Abstract AV - English IS - 1068-9265 UR - ISI:000173586700075 SO - Annals of Surgical Oncology 2002 ;9(1):S31-S31 6549 UI - 9698 AU - Ramos-Gonzalez MI AU - Olson M AU - Gatenby AA AU - Mosqueda G AU - Manzanera M AU - Campos MJ AU - Vichez S AU - Ramos JL AD - CSIC, Estac Expt Zaidin, Dept Biochem & Mol & Cellular Biol Plants, Granada 18008, SpainDuPont Co Inc, Cent Res & Dev, Expt Stn, Wilmington, DE 19880, USACtr Invest & Estudios Avanzados, Dept Plant Genet Engn, Plant Biotechnol Unit, Guanajuato 36500, MexicoRamos-Gonzalez, MI, CSIC, Estac Expt Zaidin, Dept Biochem & Mol & Cellular Biol Plants, Prof Albareda 1, Granada 18008, Spain TI - Cross-regulation between a novel two-component signal transduction system for catabolism of toluene in Pseudomonas mendocina and the TodST system from Pseudomonas putida AB - The tmoABCDEF genes encode the toluene-4-monooxygenase from Pseudomonas mendocina KR1. Upstream from the tmoA gene an open reading frame, tmoX, encoding a protein 83% identical to TodX (todX being the initial gene in the todXFC1C2BADEGIH operon from Pseudomonas putida DOT-T1E) was found. The tmoX gene is also the initial gene in the tmoXABCDEF gene cluster. The transcription initiation point from the tmoX promoter was mapped, and the sequence upstream revealed striking identity with the promoter of the tod operon of P. putida. The tod operon is regulated by a two-component signal transduction system encoded by the todST genes. Two novel genes from P. mendocina KR1, tmoST, were rescued by complementation of a P. putida DOT-TIE todST knockout mutant, whose gene products shared about 85% identity with TodS-TodT. We show that transcription from P-tmoX and P-todX can be mediated by TmoS-TmoT or TodS-TodT, in the presence of toluene, revealing cross-regulation between these two catabolic pathways MH - Mexico|Guanajuato MH - Spain MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000179529200034 L2 - CLUSTER ENCODING TOLUENE-4-MONOOXYGENASE; GRAM-NEGATIVE BACTERIA; FUNCTIONAL-ANALYSIS; CLONING VECTOR; GENES; PLASMID; PATHWAY; STRAIN; KR1; DEGRADATION SO - Journal of Bacteriology 2002 ;184(24):7062-7067 6550 UI - 10567 AU - Ramos-Velasco LE AU - Ruiz-Leon JJ AU - Celikovsky S AD - Acad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague, Czech RepublicCtr Invest & Estudios Avanzados, Unidad Guadalajara, Guadalajara 44550, Jalisco, MexicoRamos-Velasco, LE, Acad Sci Czech Republ, Inst Informat Theory & Automat, Pod Vodarenskou Vezi 4, CR-18208 Prague, Czech Republic TI - Rotary inverted pendulum: Trajectory tracking via nonlinear control techniques AB - The nonlinear control techniques are applied to the model of rotary inverted pendulum. The model has two degrees of freedom and is not exactly linearizable. The goal is to control output trajectory of the rotary inverted pendulum asymptotically along a desired reference. Moreover, the designed controller should be robust with respect to specified perturbations and parameters uncertainties. A combination of techniques based on nonlinear normal forms, output regulation and sliding mode approach is used here. As a specific feature, the approximate solution of the so-called regulator equation is used. The reason is that its exact analytic solution can not be, in general, expressed in the closed form. Though the approximate solution does not give asymptotically decaying tracking error, it provides reasonable bounded error. The performance of the designed feedback regulator is successfully tested via computer simulations MH - Czech Republic MH - Mexico|Jalisco PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000177156400007 L2 - SERVOMECHANISM PROBLEM; OUTPUT REGULATION; SYSTEMS; LINEARIZATION SO - Kybernetika 2002 ;38(2):217-232 6551 UI - 11085 AU - Rangel-Gonzalez FJ AU - Garcia-Colunga JD AU - Miledi R AD - Univ Nacl Autonoma Mexico, Ctr Neurobiol, Juriquilla 76001, Queretaro, MexicoUniv Calif Irvine, Cellular & Mol Neurobiol Lab, Dept Neurobiol & Behav, Irvine, CA 92697, USAMiledi, R, Univ Nacl Autonoma Mexico, Ctr Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Juriquilla 76001, Queretaro, Mexico TI - Inhibition of neuronal nicotinic acetylcholine receptors by La3+ AB - A study was made of the effects of La3+ on neuronal alpha2beta4 nicotinic acetylcholine receptors expressed in Xenopus oocytes. La3+ by itself (up to 10 muM) did not elicit significant membrane currents. However, La3+ reversibly inhibited the ionic currents induced by acetylcholine (IC50 = 13.5 +/- 4.3 muM). When La3+ and acetylcholine were simultaneously applied onto an oocyte, the level of inhibition of the acetylcholine response was the same as when the oocyte was first preincubated with La3+ and then exposed to acetylcholine plus La3+. In the presence of La3+, the EC50 decreased from 43.8 +/- 6.4 to 26.5 +/- 5.1 muM, suggesting a small increase in the affinity of acetylcholine for the receptors through a noncompetitive mechanism. The inhibition of acetylcholine response was independent of the membrane potential. From these results we conclude that La3+ regulates nicotinic receptors, reversibly and noncompetitively, presumably by inhibiting allosterically the receptor through interactions at an external domain of the receptor complex. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000175720800002 L2 - noncompetitive inhibition;nicotinic receptor modulation;Xenopus oocyte;metal ion;XENOPUS OOCYTES; LANTHANUM IONS; MODULATION; BLOCKAGE; MUSCLE; CELLS; 5-HYDROXYTRYPTAMINE; HETEROGENEITY; FLUOXETINE; CHANNELS SO - European Journal of Pharmacology 2002 ;441(1-2):15-21 6552 UI - 11440 AU - Rangel-Rojo R AU - Stranges L AU - Kar AK AU - Mendez-Rojas MA AU - Watson WH AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoHeriot Watt Univ, Dept Phys, Edinburgh EH14 4AS, Midlothian, ScotlandTexas Christian Univ, Dept Chem, Ft Worth, TX 76129, USARangel-Rojo, R, Ctr Invest Cient & Educ Super Ensenada, Apartado Postal 2732, Ensenada 22860, Baja California, Mexico TI - Saturation in the near-resonance nonlinearities in a triazole-quinone derivative AB - In this work, we present a study of the third-order nonlinearities of a novel organic material, a derivative of the molecule 2-amino-1,2,3 triazole-quinone. The absorptive and refractive contributions to the nonlinearity were resolved using the z-scan technique with a 88 ps pulse source at 532 nm. The open aperture z-scan results show a nonlinearity arising from a combination of induced and saturable absorption, and the closed aperture the signature of a negative n(2). The irradiance dependence of the closed aperture signal reveals a saturating nonlinearity which even decreases at high irradiances. A three-level model is used to explain the observed irradiance dependence of the nonlinearity. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - United Kingdom MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000174824200028 L2 - nonlinear optics;organics;nonlinear refractive index;3RD-ORDER NONLINEARITY; Z-SCAN; POLYDIACETYLENE; ABSORPTION; DEPENDENCE; FILM SO - Optics Communications 2002 ;203(3-6):385-391 6553 UI - 9972 AU - Rapoport YG AU - Zaspel CE AU - Mantha JH AU - Grimalsky VV AD - T Shevchenko Kiev Univ, Dept Astron & Space Sci, UA-252022 Kiev, UkraineUniv Montana Western, Dept Environm Sci, Dillon, MT 59725, USANatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoRapoport, YG, T Shevchenko Kiev Univ, Dept Astron & Space Sci, UA-252022 Kiev, Ukraine TI - Multisoliton formation from a single narrow pulse in ferrite films AB - The formation of solitons in ferrite films is modeled by a nonlinear Schroedinger equation, and numerical solution will indicate how multisoliton pulses form from a single pulse. Modeling is done using a narrow initial pulse of duration 13 ns with additional higher order terms in the equation. It is shown that the higher order terms will result in an asymmetric two-peak structure which is similar to experimentally observed soliton structures in yttrium iron garnet thin films MH - Mexico|Puebla MH - Ukraine MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9464 UR - ISI:000178867200401 L2 - ferrites;microwave envelope solitons;nonlinear Schroedinger equation;ENVELOPE SOLITONS SO - Ieee Transactions on Magnetics 2002 ;38(5):3129-3131 6554 UI - 11974 AU - Rapoport YG AU - Zaspel CE AU - Mantha JH AU - Grimalsky VV AD - Univ Montana Western, Dept Environm Sci, Dillon, MT 59725, USAT Shevchenko Kiev Univ, Dept Space Phys & Astron, UA-252022 Kiev, UkraineNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoZaspel, CE, Univ Montana Western, Dept Environm Sci, Dillon, MT 59725 USA TI - Multisoliton formation in magnetic thin films AB - Magnetostatic waves propagating in a yttrium iron garnet thin film will evolve according to the nonlinear Schrodinger equation, which supports soliton formation owing to a balance of the dispersive and nonlinear effects. Numerical simulations of this equation are performed to show that a symmetric initial pulse will evolve into a symmetric single or multipeak structure depending on the amplitude of the initial pulse. Simulations performed with the addition of a nonlinear dispersive term and a third-order linear dispersive term show the development of significant asymmetry of the two- and three-soliton structure. Comparison of the calculated multisoliton profiles with previous experimental data show a qualitative similarity, thereby providing evidence for the necessity of higher-order terms for the modeling of soliton formation MH - Mexico|Puebla MH - Ukraine MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000173213100068 L2 - NONLINEAR SCHRODINGER-EQUATION; IRON-GARNET FILMS; ENVELOPE SOLITONS; OPTICAL SOLITONS; DISPERSION SO - Physical Review B 2002 ;65(2): 6555 UI - 10289 AU - Rauw G AU - Crowther PA AU - Eenens PRJ AU - Manfroid J AU - Vreux JM AD - Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Sart Tilman, BelgiumUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoRauw, G, Univ Liege, Inst Astrophys & Geophys, Allee 6 Aout,BAt B5C, B-4000 Liege, Sart Tilman, Belgium TI - The evolved early-type binary HDE 228766 revisited AB - We use an extensive set of spectroscopic observations to reinvestigate the properties of the massive binary HDE 228766. Conventional classification criteria suggest that HDE 228766 consists of an O7 primary and an Of(+) secondary. However, several spectral features of the secondary, such as the simultaneous presence of N III, N IV and N V emissions, make it a rather unusual object. We find that the orbital motion of the secondary is probably best described by the radial velocities of the narrow N III emission lines. Our orbital solution yields m(1) sin(3) i = 31:7 and m(2) sin(3) i = 25:5 M. for the primary and secondary respectively. The He II lambda 4542 absorption in the secondary's spectrum appears considerably blue-shifted with respect to the narrow emission lines, indicating that the absorption is probably formed in the accelerating part of the secondary's wind. We use a tomographic technique to investigate the profile variability of the broader emission lines. In addition to a strong emission from the secondary, the Halpha line displays a weak emission feature that is probably associated with a wind interaction region located near the surface of the primary star. Finally, our analysis of the spectrum with a non-LTE code indicates that the secondary is an evolved object that exhibits some CNO processed material in its atmosphere and has a large mass loss rate. Assuming a distance of 3.5 kpc (which follows from adopting M-V,M-s = -6 for the secondary) we infer (M) over dot similar or equal to 10(5) M. yr(-1) for the secondary. Our results suggest that HDE 228766 could be in a post-Roche lobe overflow stage. The secondary may be classified as WN8ha and is currently in a transition stage between a "normal" Of staranda WNL-type Wolf-Rayet star MH - Belgium MH - United Kingdom MH - Mexico|Guanajuato PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178001100018 L2 - binaries : spectroscopic;stars : early-type;stars : fundamental parameters;stars : individual : HDE 228766;O-TYPE STARS; COLLIDING WINDS; WNL STARS; SYSTEMS; CLASSIFICATION; SPECTROSCOPY; EVOLUTION; CYG SO - Astronomy & Astrophysics 2002 ;392(2):563-574 6556 UI - 10871 AU - Rebollar-Tellez EA AU - Hamilton JGC AU - Ward RD AD - Univ Keele, Sch Life Sci, Ctr Appl Entomol & Parsitol, Chem Ecol Grp, Keele ST5 5BG, Staffs, EnglandRebollar-Tellez, EA, Univ Autonoma Yucatan, Dr Invest Reg Dr Hideyo Noguchi, Ave Itzaes 490, Merida 97000, Yucatan, Mexico TI - Biting site selection on a human volunteer by members of the Lutzomyia longipalpis complex AB - Biting site distribution by three members of the Lutzomyia longipalpis (Lutz and Neiva) complex was documented on a 29-year-old male human volunteer. Observations were carried out in an experimental cage. Populations originated from Curarigua, Lara State, Venezuela; Jacobina, Bahia State, Brazil; and Marajo Island, Para State, Brazil. Female sand flies from Jacobina displayed a marked preference for biting on the ears; whereas, those from Curarigua and Marajo exhibited less preference for biting on the ears. Biting selection behavior seemed to be odor-mediated as revealed by female sand fly responses to ear extracts. The time required by each population to locate the host was compared and results showed that female sand flies from Jacobina took significantly less time to find the host than the other two members of the complex MH - United Kingdom MH - Mexico|Yucatan PB - DALLAS: SOUTHWESTERN ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0147-1724 UR - ISI:000176309400012 L2 - ANOPHELES-GAMBIAE SS; SEX-PHEROMONE; PROPOSED STRUCTURE; LIMBURGER CHEESE; HUMAN SKIN; PARA STATE; DIPTERA; PSYCHODIDAE; BRAZIL; HOMOSESQUITERPENE SO - Southwestern Entomologist 2002 ;27(1):97-104 6557 UI - 9658 AU - Rebollar M AU - Yates M AU - Valenzuela MA AD - Inst Catalisis & Petroleoquim, Madrid 28049, Spain. UPALM, Inst Politecn Nacl, ESIQIE, Lab Catalisis & Mat, Mexico City 07738, DF, Mexico TI - Application of experimental design for NOx reduction by Pd-Cu catalysts AB - The possibilities of working with experimental design and the corresponding model to determine the formulation of new catalysts and calculate a priori their expected conversion values was studied. Eight Pd-Cu catalysts supported on mixed Al-Mg oxides prepared via a sol-gel route were produced and evaluated in the reduction of NO employing propane as the reducing agent. This technique greatly reduces the number of experiments necessary in order to define the factors of greatest importance in the preparation and operational variables, thus reducing the time needed to fine tune a catalyst composition towards the particular reaction system under study MH - Mexico|Distrito Federal MH - Spain T3 - SCIENTIFIC BASES FOR THE PREPARATION OF HETEROGENEOUS CATALYSTSStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticle0SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALBV62A AV - English IS - 0167-2991 UR - ISI:000179552800045 L2 - experimental design;NO reduction;environmental catalysis SO - 2002 ;():407-414 6558 UI - 9761 AU - rechavaleta-Velasco F AU - Ogando D AU - Parry S AU - Vadillo-Ortega F AD - Inst Nacl Perinatol, Res Direct, Mexico City 11000, DF, MexicoUniv Penn, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAVadillo-Ortega, F, Inst Nacl Perinatol, Res Direct, Montes Urales 800, Mexico City 11000, DF, Mexico TI - Production of matrix metalloproteinase-9 in lipopolysaccharide-stimulated human amnion occurs through an autocrine and paracrine proinflammatory cytokine-dependent system AB - The objective of this study was to determine the presence of autocrine/paracrine regulation of matrix metalloproteinase-9 (MMP-9) expression mediated by proinflammatory cytokines in human fetal membranes. Fetal membranes obtained from women who underwent cesarean delivery before labor were manually separated into amnion and chorion layers and maintained in culture. These explants; were stimulated with tumor necrosis factor alpha (TNFalpha), interleukin-1beta (IL-1beta), and either lipopolysaccharide (LPS) alone or LPS with anti-TNFalpha or anti-IL-1beta-neutralizing antibodies. Levels of proMMP-9 in culture media were evaluated by zymography. Enzyme-linked immunosorbant assay was performed to measure the quantity of IL-1beta, TNFalpha, and tissue inhibitor of matrix metalloproteinases-1 (TIMP-1) after LPS stimulation. ProMMP-9 activity was upregulated after stimulation of the amnion by LPS, TNFalpha, and IL-10. The increased activity of proMMP-9 resulting from LPS stimulation in the amnion was blocked by the addition of TNFalpha neutralizing antibody but not with anti-IL-10. No significant effect of LPS, TNFalpha, or IL-10 on proMMP-9 expression was observed in the chorion; however, the chorion produced both cytokines when stimulated with LPS. In contrast, TMP-1 levels remained unchanged in all cultures incubated in the presence of LPS. Therefore, these data indicate that proMMP-9 is produced by the amnion but not the chorion in response to LPS. Because anti-TNFalpha-neutralizing antibody inhibits proMMP-9 activity in the amnion, TNFalpha appears to upregulate proMMP-9 production by the amnion in an autocrine fashion. Meanwhile, TNFalpha and IL-10 produced by the chorion may upregulate amnionic proMMP-9 production in a paracrine manner MH - Mexico|Distrito Federal MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 20 U4 - Reproductive Biology U5 - J;Article AV - English IS - 0006-3363 UR - ISI:000179472900037 L2 - cytokines;parturition;pregnancy;NECROSIS-FACTOR-ALPHA; HUMAN-TISSUE INHIBITOR; HUMAN GESTATIONAL TISSUES; HUMAN FETAL MEMBRANES; HUMAN CHORIONIC CELLS; PREMATURE RUPTURE; PRETERM LABOR; INTRAAMNIOTIC INFECTION; INFLAMMATORY CYTOKINES; IV COLLAGENASE SO - Biology of Reproduction 2002 ;67(6):1952-1958 6559 UI - 10801 AU - Redon R AU - Torrens H AU - Wang ZH AU - Morales-Morales D AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Div Estudios Posgrado, Mexico City 04510, DF, MexicoUniv Hawaii Manoa, Dept Chem, Honolulu, HI 96822, USAMorales-Morales, D, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Allyl-palladium complexes with fluorinated benzene thiolate ligands. Examination of the electronic effects in the Pd-catalyzed allylic alkylation reaction with the catalytic system [(eta(3)-C3H5)Pd(mu-SRf)](2)/PR3 AB - The bimetallic complexes [(eta(3)-C3H5)Pd(mu-SRf)](2) [R-f = C6F5, (1); C6F4H-4, (2); C6H4F-2, (3); C6H4F-3, (4) and C6H4F-4, (5)] in the presence of para-substituted phosphines P(C6H4X-4)(3) [X = OCH3, CH3, H, F, Cl, and CF3] are efficient catalytic systems in the allylic alkylation couplings of (E)-3-acetoxy-1,3-diphenyl-1-propene and dimethyl malonate. Results concerning the electronic effects of both sulfur and phosphorus substituents in this reaction are discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000176474300004 L2 - allyl palladium complexes;allylic alkylation;fluorothiolate complexes;electronic effects;catalysis;DINUCLEAR RHODIUM COMPLEXES; HOMOGENEOUS CATALYSIS; PHOSPHORUS LIGANDS; HECK REACTION; HYDROFORMYLATION; PRECURSORS; MIXTURES SO - Journal of Organometallic Chemistry 2002 ;654(1-2):16-20 6560 UI - 7926 AU - Regar E AU - Morice MC AU - Sousa J AU - Fajadet J AU - Perin M AU - Hayashi EB AU - Colombo A AU - Serruys R AD - Thorax Ctr Rotterdam, Rotterdam, NetherlandsL Inst Cardiovasc Paris Sud, Massy, FranceInst Dante Pazzaneze Cardiol, Sao Paulo, BrazilClin Pasteur, Toulouse, FranceIncor Hosp, Sao Paulo, BrazilInst Nacl Cardiol, Mexico City, DF, MexicoCtr Cuore Columbus, Milan, ItalyThorax Ctr Rotterdam, Rotterdam, Netherlands TI - Can sirolimus-eluting stents prevent restenosis in diabetic patients? A subanalysis of the randomized, multi-center RAVEL trial MH - Brazil MH - France MH - Italy MH - Mexico|Distrito Federal MH - Netherlands PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000179753300532 SO - European Heart Journal 2002 ;23():142-142 6561 UI - 11851 AU - Reguera RM AU - Balana-Fouce R AU - Perez-Pertejo Y AU - Fernandez FJ AU - Garcia-Estrada C AU - Cubria JC AU - Ordonez C AU - Ordonez D AD - Univ Leon, Fac Vet, Dept Farmacol & Toxicol, E-24071 Leon, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol Ciencias Biol & Salud, Mexico City 09340, DF, MexicoOrdonez, D, Univ Leon, Fac Vet, Dept Farmacol & Toxicol, Campus Vegazana S-N, E-24071 Leon, Spain TI - Cloning expression and characterization of methionine adenosyltransferase in Leishmania infantum promastigotes AB - Methionine adenosyltransferase (MAT) catalyzes the synthesis of s-adenosylmethionine (AdoMet), a metabolite that plays an important role in a variety of cellular functions, such as methylation, sulfuration, and polyamine synthesis. In this study, genomic DNA from the protozoan parasite Leishmania infantum was cloned and characterized. L infantum NUT, unlike mammalian MAT, is codified by two identical genes in a tandem arrangement and is only weakly regulated by AdoMet. L. infantum MAT mRNA is expressed as a single transcript, with the enzyme forming a homodimer with tripolyphosphatase in addition to MAT activity. Expression of L. infantum MAT in Escherichia coli proves that the MAT and tripolyphosphatase activities are functional in vivo. MAT shows sigmoidal behavior and is weakly inhibited by AdoMet, whereas tripolyphosphatase activity has sigmoidal behavior and is strongly activated by AdoMet. Plasmids containing the regions flanking MAT2 were fused immediately upstream and downstream of the luciferase-coding region and transfected into L. infantum. Subsequent examination of luciferase activity showed that homologous expression in L infantum promastigotes was dramatically dependent on the presence of polypyrimidine tracts and a spliced leader junction site upstream of the luciferase gene, whereas down. stream sequences appeared to have no bearing on expression MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000173688000015 L2 - S-ADENOSYLMETHIONINE SYNTHETASE; ESCHERICHIA-COLI; SACCHAROMYCES-CEREVISIAE; NUCLEOTIDE-SEQUENCE; TRYPANOSOMA-BRUCEI; MOLECULAR-CLONING; GENE-EXPRESSION; STRUCTURAL GENE; ACTIVATION; SUBUNIT SO - Journal of Biological Chemistry 2002 ;277(5):3158-3167 6562 UI - 9783 AU - Reigada R AU - Sarmiento A AU - Lindenberg K AD - Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Matemat, Chamilpa 62200, Morelos, MexicoReigada, R, Univ Calif San Diego, Dept Chem & Biochem, 9500 Gilman Dr, La Jolla, CA 92093 USA TI - Asymptotic dynamics of breathers in Fermi-Pasta-Ulam chains AB - We carry out a numerical study of the asymptotic dynamics of breathers in finite Fermi-Pasta-Ulam chains at zero and nonzero temperatures. While at zero temperature such breathers remain essentially stationary and decay extremely slowly over wide parameter ranges, thermal fluctuations tend to lead to breather motion and more rapid decay. In both cases the decay is essentially exponential over long time intervals MH - USA MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179176300108 L2 - INTRINSIC LOCALIZED MODES; NONLINEAR LATTICES; DISCRETE BREATHERS; RELAXATION; EXISTENCE; STABILITY; SYSTEMS SO - Physical Review e 2002 ;66(4): 6563 UI - 11247 AU - Reigada R AU - Sarmiento A AU - Lindenberg K AD - Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Matemat, Chamilpa 62200, Morelos, MexicoLindenberg, K, Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA TI - Energy relaxation in Fermi-Pasta-Ulam arrays AB - The dynamics of energy relaxation in thermalized one- and two-dimensional arrays with nonlinear interactions depend in detail on the interactions and, in some cases, on dimensionality. We describe and explain these differences for arrays of the Fermi-Pasta-Ulam type. In particular, we focus on the roles of harmonic contributions to the interactions and of breathers in the relaxation process. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000175238100010 L2 - localized modes;thermal relaxation;Fermi-Pasta-Ulam arrays;INTRINSIC LOCALIZED MODES; ANHARMONIC LATTICES; NONLINEAR LATTICES; BREATHERS; EXISTENCE; CHAIN; LEVY SO - Physica A-Statistical Mechanics and Its Applications 2002 ;305(3-4):467-485 6564 UI - 10301 AU - Reimbert CG AU - Garza-Hume CE AU - Minzoni AA AU - Smyth NF AD - Univ Edinburgh, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandNatl Autonomous Univ Mexico, IIMAS, Dept Math & Mech, FENOMEC, Mexico City 01000, DF, MexicoSmyth, NF, Univ Edinburgh, Dept Math & Stat, Kings Bldgs,Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland TI - Active TM mode envelope soliton propagation in a nonlinear nernatic waveguide AB - In this note the propagation of an envelope optical soliton in a nematic waveguide is examined. The waveguide is subject to an elastic distortion and this distortion propagates as a front, which in turn influences the propagation of the soliton. It is found that the re-orientation of the optical director can produce either defocusing or focusing of the soliton, thus influencing its motion. Both approximate equations and numerical solutions show that a modulation in the defocusing optical regime can catch up with the re-orientation front and then form an envelope soliton in the focusing region ahead of the front. Furthermore, numerical solutions show that slow modulations in the defocusing region disintegrate into radiation. A limiting solution of a coherent optical soliton locked onto the front also exists, but it is meta-stable and eventually disintegrates. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000177842000002 L2 - soliton;nematic;nonlinear Schrodinger equation;liquid crystal;SCHRODINGER-EQUATION; LIQUID-CRYSTALS SO - Physica D-Nonlinear Phenomena 2002 ;167(3-4):136-152 6565 UI - 10717 AU - Reipurth B AU - Rodriguez LF AU - Anglada G AU - Bally J AD - Univ Hawaii, Inst Astron, Honolulu, HI 96822, USAUNAM, Astron Inst, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USAReipurth, B, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA TI - Radio continuum maps of deeply embedded protostars: Thermal jets, multiplicity, and variability AB - We have carried out a deep, 3.6 cm radio continuum survey of young outflow sources using the Very Large Array in its A configuration providing subarcsecond resolution. The seven regions observed are L1448-N, IRAS 2 and 4 in NGC 1333, L1551-NE, SSV 63 in L1630, HH 124 IRS in NGC 2264, and B335 IRS. The first three of these objects are known from submillimeter observations to be multiple sources, and we detect almost all known submillimeter components at 3.6 cm. The L1551-NE source is confirmed to be a subarcsecond binary. We find a third radio source in the SSV 63 system, which drives the multiple HH 24 jets. HH 124 IRS is embedded in a cometary cloud, where we detect a small cluster of six time-variable radio continuum sources. Six of the observed sources are resolved into compact thermal radio jets MH - USA MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 35 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000176888900031 L2 - binaries : general;ISM : jets and outflows;radio continuum;stars : formation;stars : pre-main-sequence;HARO ENERGY-SOURCES; YOUNG STELLAR OBJECTS; SMALL-SCALE STRUCTURE; EXCITING SOURCES; STAR-FORMATION; VLA DETECTION; MOLECULAR OUTFLOWS; NGC-1333 IRAS-4; BIPOLAR OUTFLOW; BINARY-SYSTEM SO - Astronomical Journal 2002 ;124(2):1045-1053 6566 UI - 12056 AU - Relano M AU - Peimbert M AU - Beckman J AD - Inst Astrofis Canarias, Tenerife, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoConsejo Super Invest Cient, Madrid, SpainRelano, M, Inst Astrofis Canarias, Via Lactea S-N, Tenerife, Spain TI - Photoionization models of NGC 346 AB - We present spherically symmetric and plane-parallel photoionization models of NGC 346, an H II region in the Small Magellanic Cloud. The models are based on CLOUDY and on the observations of Peimbert, Peimbert, & Ruiz. We find that approximately 45% of the H ionization photons escape from the H II region, providing an important ionizing source for the low-density interstellar medium of the SMC. The predicted I(4363)/I(5007) value is smaller than that observed, probably implying that there is an additional source of energy not taken into account by the models. From the ionization structure of the best model and the observed line intensities we determine the abundances of N, Ne, S, Ar, and Fe relative to O MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173166900017 L2 - galaxies : abundances;galaxies : individual (Small Magellanic Cloud);galaxies : ISM;HII regions;ISM : abundances;COMBINED STELLAR STRUCTURE; SMALL-MAGELLANIC-CLOUD; H-II REGIONS; CHEMICAL-COMPOSITION; MASSIVE STARS; ATMOSPHERE MODELS; EVOLUTION; GALAXIES; NGC-346; FLUXES SO - Astrophysical Journal 2002 ;564(2):704-711 6567 UI - 10149 AU - rellano-Carbajal F AU - Olmos-Soto J AD - Ctr Invest Cient & Educ Super Ensenada, Mol Microbiol Lab, Dept Marine Biotechnol, Ensenada, Baja California, MexicoOlmos-Soto, J, Dept Biotecnol Marina, POB 434844, San Diego, CA 92143 USA TI - Thermostable alpha-1,4- and alpha-1,6-glucosidase enzymes from Bacillus sp isolated from a marine environment AB - Penaeus vannamei ( the shrimp) is an omnivorous species and it can be assumed that a high level of carbohydrates is necessary for its growth. alpha-1,4- and 1,6-glucosidases are important enzymes necessary for the ultimate liberation of glucose residues from various carbohydrates, principally starch. However, the shrimps hepatopancreas produces only alpha-1,4-glucosidases, which limits the growth rate in different sources of starch. In order to identify strains with alpha-1,4- and 1,6-glucosidase enzymes with potential uses in shrimp feed production, Bacillus strains were isolated from marine environments. One strain produced large amounts of an extracellular thermostable alpha-glucosidase that permitted good growth on starch. The organism was identified by polymorphism (restriction-fragment-length polymorphism, RFLP), sequenced, and named B. subtilis LMM-12 MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000178319200013 L2 - amylopectin-alpha-1,6-bonds;digestibility-shrimp;alpha-glucosidase;phylogenetic identification;starch;GLUCOSIDASE; GENE; IDENTIFICATION; LICHENIFORMIS; SUBTILIS; MALTASE SO - World Journal of Microbiology & Biotechnology 2002 ;18(8):791-795 6568 UI - 11140 AU - Rendon-Villalobos R AU - Bello-Perez LA AU - Osorio-Diaz P AU - Tovar J AU - Paredes-Lopez O AD - IPN, Ctr Desarrollo Prod Biot, Yautepec, Morelos, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas, VenezuelaIPN, Ctr Invest & Estudios Avanzados, Irapuato, Guanajuato, MexicoBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, Yautepec, Morelos, Mexico TI - Effect of storage time on in vitro digestibility and resistant starch content of nixtamal, masa, and tortilla AB - Nixtamal, masa, and tortilla samples were stored for 24-96 hr and their chemical composition, retrogradation, and in vitro starch digestibility features were evaluated. Ash and fat contents in the three products were smaller than in the original corn sample, but protein levels were higher, all in accordance with previous studies. In general, a minor decrease in available starch (AS) content was observed with storage time. Masa showed the greatest AS values, followed by tortilla and nixtamal. Tortilla presented slightly higher retrograded resistant starch (RS3) values (1.1-1.8%, dmb) than masa (0.7-0.9%) and nixtamal (0.7-0.8%) and only minor increases were observed after 24 hr of storage, suggesting that retrogradation phenomenon in these samples takes place very rapidly and is more pronounced in the final product (tortilla). The development of RS3 explains the observed decrease in AS, Higher total resistant starch values were found in all samples at a range of 2.1-2.6% for nixtamal and masa, and a range of 3.1-3.9% in tortilla. This indicates that, apart from retrograded resistant starch, some ungelatinized fractions appear to contibute to the indigestible content of these products. The alpha-amylolysis rate of the three materials decreased with storage. Tortilla showed the greatest hydrolysis indices. Differential scanning calorimetry (DSC) analysis showed that the nixtamal, masa, and tortilla did not show differences in amylopectin crystal melting temperature with storage time, but tortilla exhibited higher enthalpy values after 72 hr of storage, in accordance with the greater total RS contents recorded after prolonged storage MH - Mexico|Guanajuato MH - Mexico|Morelos MH - Venezuela PB - ST PAUL: AMER ASSOC CEREAL CHEMISTS RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0009-0352 UR - ISI:000175629300003 L2 - SMALL-INTESTINE; GLYCEMIC-INDEX; FLOURS; FOOD; DIGESTION; BEANS; AVAILABILITY; HYDROLYSIS; LEGUMES; INVITRO SO - Cereal Chemistry 2002 ;79(3):340-344 6569 UI - 11401 AU - Renton K AD - Univ Kent, Durrell Inst Conservat & Ecol, Canterbury CT2 7NS, Kent, EnglandRenton, K, Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, Aptdo Postal 21, San Patricio 48980, Jalisco, Mexico TI - Influence of environmental variability on the growth of Lilac-crowned Parrot nestlings AB - Growth rate parameters were analysed for Lilac-crowned Parrot Amazona finschi nestlings in the tropical dry forest of the Reserva de la Biosfera Chamela-Cuixmala, Mexico. Growth rates for psittacine species follow the inverse relation with body mass observed for neotropical landbirds, with larger parrot species exhibiting slower growth rates. There was significant variation between years in size and growth rates of Lilac-crowned Parrot nestlings with nestlings exhibiting slower growth rates in 1996 than in 1997. Food abundance for parrots also varied significantly between years, with greater food availability during the 1997 breeding season than that of 1996. The increased size and growth rates of nestlings in 1997 may have reflected this, and suggests the potential influence of environmental variability on parrot reproduction, particularly in such a markedly seasonal habitat MH - United Kingdom MH - Mexico|Jalisco PB - TRING: BRITISH ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 8 U4 - Ornithology U5 - J;Article AV - English IS - 0019-1019 UR - ISI:000175064100016 L2 - COCKATOO CALYPTORHYNCHUS-FUNEREUS; MARTINS DELICHON-URBICA; BREEDING BIOLOGY; AMERICAN KESTRELS; CRIMSON ROSELLAS; FOOD REDUCTIONS; FRUIT ABUNDANCE; PARENTAL EFFORT; TREE SWALLOWS; CANOPY TREES SO - Ibis 2002 ;144(2):331-339 6570 UI - 9859 AU - Resendes AR AU - Almeria S AU - Dubey JP AU - Obon E AU - Juan-Salles C AU - Degollada E AU - Alegre F AU - Cabezon O AU - Pont S AU - Domingo M AD - USDA, Agr Res Serv, Parasite Biol Epidemiol & Systemat Lab, Anim & Nat Resources Inst, Beltsville, MD 20705, USAUniv Autonoma Barcelona, Fac Vet, Bellaterra 08193, SpainCRAM, Barcelona 08330, SpainAfricam Safari, Dept Patol, Puebla 72007, MexicoDubey, JP, USDA, Agr Res Serv, Parasite Biol Epidemiol & Systemat Lab, Anim & Nat Resources Inst, Bldg 1001, Beltsville, MD 20705 USA TI - Disseminated toxoplasmosis in a Mediterranean pregnant Risso's dolphin (Grampus griseus) with transplacental fetal infection AB - Fatal disseminated toxoplasmosis was diagnosed in a Risso's dolphin (Grampus griseus) dam and its fetus on the basis of pathologic findings, immunohistochemistry, and structure of the parasite. The dolphin was stranded alive on the Spanish Mediterranean coast and died a few hours later. At necropsy the dam was in good condition. From the standpoint of pathology, however, it had generalized lymphadenomegaly and splenomegaly, enlargement of and multifocal hemorrhage in the adrenal glands, diffuse mucosal hemorrhage of the glandular and pyloric stomach, ulcerative glossitis and stomatitis, focal erosions and reddening of the laryngeal appendix, and severe paraotic sinusitis with intralesional nematodes Crassicauda grampicola. The dolphin was pregnant, most probably in the first gestational trimester. The most prominent microscopic lesions were multifocal granulomatous encephalomyelitis, diffuse subacute interstitial pneumonia, mild multifocal necrotizing hepatitis and nonsuppurative cholangiohepatitis, gastritis and adrenalitis, mild lymphoid depletion, medullary sinus and follicular histyocitosis, and systemic hemosiderosis. The fetus had foci of coagulative and lytic necrosis in the kidneys, the, lung, and the heart. Most lesions were associated with tachyzoites and tissue cysts of Toxoplasma gondii. The diagnosis was confirmed immunohistochemically. This is the first report on toxoplasmosis in a Risso's dolphin (G. griseus) and on transplacental transmission to an early-stage fetus in any cetaceans MH - USA MH - Mexico|Puebla MH - Spain PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 12 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000179016200038 L2 - NEOSPORA-CANINUM; GONDII; MICE; SEAL SO - Journal of Parasitology 2002 ;88(5):1029-1032 6571 UI - 11628 AU - Resendes AR AU - Juan-Salles C AU - Almeria S AU - Majo N AU - Domingo M AU - Dubey JP AD - USDA ARS, Parasite Biol Epidemiol & Systemat Lab, Anim & Nat Resources Inst, Beltsville, MD 20705, USAUniv Autonoma Barcelona, Fac Vet, UD Histol & Anat Patol, Bellaterra 08193, SpainDept Patol, Puebla 72007, MexicoUniv Autonoma Barcelona, Fac Vet, UD Parasitol, Bellaterra 08193, SpainDubey, JP, USDA ARS, Parasite Biol Epidemiol & Systemat Lab, Anim & Nat Resources Inst, Bldg 1001, Beltsville, MD 20705 USA TI - Hepatic sarcocystosis in a striped dolphin (Stenella coeruleoalba) from the Spanish Mediterranean coast AB - Fatal hepatic sarcocystosis was diagnosed in a striped dolphin (Stenella coeruleoalba) from the northeastem Spanish Mediterranean coast based on pathologic findings and the microscopic and ultrastructural characteristics of the intralesional parasite. Main gross lesions were icterus, subcutaneous hemorrhages, and hepatic congestion. The most prominent microscopic lesions consisted of severe acute multifocal to coalescing necrotizing hepatitis with cholestasis and intralesional protozoa. There was severe chronic pancreatitis with generalized distension of pancreatic ducts by hyaline plugs and adult trematodes. Only asexual stages of the protozoa were found. The parasite in the liver divided by endopolygeny. Schizonts varied in shape and size. Mature schizonts had morazoites randomly arranged or budding peripherally around a central residual body. Schizonts were up to 22 mum long, and merozoites were up to 6 lain long. Ultrastructurally, merozoites lacked rhoptries. This parasite failed to react by immunohistochemistry with anti-Toxoplasma gondii, anti-Neospora caninum and anti-Sarcocystis neurona antibodies. The microscopic and ultrastructural morphologies of the parasite were consistent with Sarcocystis canis, so far described only from animals in the Unites States. The life cycle and source of S. canis are unknown. The present report of S. canis-like infection in a sea mammal from Spain indicates that the definitive host for this parasite also exists outside of the United States MH - USA MH - Mexico|Puebla MH - Spain PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 7 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000174215300040 L2 - ETIOLOGIC AGENT; SEA OTTER; APICOMPLEXA; CHINCHILLA; INFECTION; FRENKELIA; PROTOZOA; DOGS SO - Journal of Parasitology 2002 ;88(1):206-209 6572 UI - 8689 AU - Reta-Sanchez DG AU - Fowler JL AD - INIFAP, Torreon 27000, Coahuila, MexicoNew Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USAReta-Sanchez, DG, INIFAP, Apartado Postal 247, Torreon 27000, Coahuila, Mexico TI - Canopy light environment and yield of narrow-row cotton as affected by canopy architecture AB - Alterations of plant architecture in narrow-row cotton (Gossypium hirsutum L.) using management and genetic strategies to improve light penetration into the canopy may increase crop yields. The objective of this study was to quantify how plant architecture changes affect light penetration into the canopy, yield, and yield components of narrow-row cotton. The study was conducted on a Glendale clay loam soil (fine montmorillonitic, thermic Typic Torrert). Two field experiments were established on 0.76-m rows in 1995 and 1996. Treatments consisted of the following plant architecture modifications: pruning leaves throughout the canopy, mechanical topping, trimming of branches, and temporarily opening the canopy during boll production. Photosynthetic photon flux density (PPFD) interception and PPFD penetration into the canopy were measured when the canopy was fully developed. Seed-cotton yield and yield components by plots, fruiting positions, and strata by four main-stem node groups were obtained. Early canopy modifications simulating plant characteristics such as reduced plant height, short branches, and modified leaf shape increased light availability at the medium and upper part of the canopy. Modified canopy treatments grown at 97 000 plants ha(-1) reached high PPFD interception (90-97%), with leaf area index from 3.7 to 5.2. Treatments to increase light distribution in the canopy while maintaining a high PPFD interception increased seed-cotton yield by 34% due to a 26% increase in number of bolls per square meter. A canopy light environment improved during the first 3 wk after canopy closure (86-107 d after sowing) increased number of bolls per square meter by 33% MH - Mexico|Coahuila MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 1 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000182260900012 L2 - LINT YIELD; LEAF MORPHOLOGY; PHOTOSYNTHESIS; GROWTH SO - Agronomy Journal 2002 ;94(6):1317-1323 6573 UI - 10981 AU - Revilla MC AU - ndrade-Cetto A AU - Islas S AU - Wiedenfeld H AD - Natl Med Ctr, Metab Dis Res Unit, SXXI, IMSS, Mexico City, DF, MexicoUNAM, Fac Ciencias, Dept Biol Celular, Mexico City, DF, MexicoUniv Bonn, Inst Pharmaceut, D-53121 Bonn, GermanyAndrade-Cetto, A, Apartado Postal 70-359, Mexico City 04511, DF, Mexico TI - Hypoglycemic effect of Equisetum myriochaetum aerial parts on type 2 diabetic patients AB - The hypoglycemic effect of a water extract from aerial parts (0.33 g/kg) of Equisetum myriochaetum Schlecht and Chain (Equisetaceae) was analyzed in 11 recently diagnosed type 2 diabetic patients. A single dose of this extract was orally administered. Glucose and insulin were determined at 0, 30, 60, 90,120 and 180 min after administration. The same patients served as the control group and received only colored water as placebo. The administration of the extract significantly reduced the blood glucose levels of the type 2 diabetic patients within 90, 120 and 180 min. There were no significant changes in the insulin levels. The results demonstrate that the water extract of the aerial parts of E. myriochaetum shows a hypoglycemic effect in type 2 diabetic patients starting 90 min after its administration. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000176030400016 L2 - Mexican hypoglycemic plants;Equisetum myriochaetum;type 2 dibetes SO - Journal of Ethnopharmacology 2002 ;81(1):117-120 6574 UI - 9304 AU - Reyes-Bonilla H AU - Carriquiry JD AU - Leyte-Morales GE AU - Cupul-Magana AL AD - Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149, USAUniv Autonoma Baja California, Inst Invest Oceanologicas, Div Geoquim Ambiental, Ensenada 22800, Baja California, MexicoUniv Mar del Plata, Inst Recursos, Puerto Angel 70902, Oaxaca, MexicoUniv Guadalajara, Ctr Univ Costa, Puerto Vallarta 48280, Jalisco, MexicoReyes-Bonilla, H, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Effects of the El Nino-Southern Oscillation and the anti-El Nino event (1997-1999) on coral reefs of the western coast of Mexico MH - USA MH - Mexico|Baja California MH - Mexico|Jalisco MH - Mexico|Oaxaca PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0722-4028 UR - ISI:000180653000007 L2 - El Nino;La Nina;Mexico;Pacific;coral bleaching;coral mortality;GULF-OF-CALIFORNIA; CABO-PULMO REEF; COMMUNITY STRUCTURE; PACIFIC; TEHUANTEPEC; MORTALITY; HUATULCO SO - Coral Reefs 2002 ;21(4):368-372 6575 UI - 12205 AU - Reyes-Bonilla H AD - Univ Autonoma Baja California, Sur Dept Biol Marina, La Paz 23080, BCS, MexicoReyes-Bonilla, H, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Checklist of valid names and synonyms of stony corals ( Anthozoa : Scleractinia) from the eastern Pacific AB - The taxonomy and species richness of the stony corals of the eastern Pacific have been studied for more than a hundred years, but discrepancies in the nomenclature of some species were common, a situation which affected the quality of ecological and biogeographic analysis. During the last decade, the identity of most scleractinians of the region was well established but subsequently, the discovery of new colonizing and endemic species demanded a new revision of the taxonomic status of this fauna. The objective of this paper is to present an updated checklist of all accepted and synonym names of coral species of the eastern Pacific, from Alaska (USA) to Tierra del Fuego (Chile), considering as valid those which have appeared in recent reviews of this fauna (1993 to date). The status of each species was tracked in the literature as far as its original description or first report in the region, a strategy which also enabled recording and detailed assignment of the respective synonyms and their geographic distribution. There are 124 valid species names of stony corals in the eastern Pacific from 51 genera and 15 families; of them, 83 species have no synonyms, three are only tentatively identified and six are considered valid but in the process of formal description. This updated list comprises more taxa than any previous compilation. The increase in number is due to the recent discoveries of species in extreme latitudes or oceanic islands, and the description of new species. This study shows that the eastern Pacific coral fauna is relatively poor, but nevertheless there are many more species than originally thought MH - USA MH - Mexico|Baja California Sur PB - LONDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0022-2933 UR - ISI:000172731500001 L2 - checklist;Scleractinia;corals;eastern Pacific;taxonomy;biogeography;SCLERACTINIAN CORALS; EASTERN PACIFIC; ANTHOZOA; BIOGEOGRAPHY SO - Journal of Natural History 2002 ;36(1):1-13 6576 UI - 10524 AU - Reyes-Chilpa R AU - Jimenez-Estrada M AU - Godinez MV AU - Hernandez-Ortega S AU - Campos M AU - Bejar E AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoSan Diego State Univ, San Diego, CA 92182, USAInst Mexicano Seguro Social, CMN Siglo 21, Hosp Especialidades, UIM Frmacol, Mexico City 06725, DF, MexicoPlant Bioassay, Spring Valley, CA 91977, USA TI - A novel cacalolide from Psacalium decompositum AB - A new cacalolide sesquiterpenoid, named as Romo-A, was isolated from the roots of Psacalium decompositum, Asteraceae, a Mexican medicinal shrub with antidiabetic properties. Its structure was elucidated by NMR, MS, IR, UV, and confirmed by X-ray diffraction studies MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Chemistry, Medicinal U5 - J;Article AV - English IS - 1057-5634 UR - ISI:000177267900006 L2 - Psacalium decompositum;Asteraceae;cacalolides;sesquiterpenoids;furanoeremophilanes;diabetes mellitus;MICE SO - Natural Product Letters 2002 ;16(4):239-242 6577 UI - 11054 AU - Reyes-Grajeda JP AU - Jauregui-Zuniga D AU - Rodriguez-Romero A AU - Hernandez-Santoyo A AU - Bolanos-Garcia VM AU - Moreno A AD - Natl Autonomous Univ Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Cambridge, Dept Biochem, Cambridge CB2 1GA, England TI - Crystallization and preliminary X-ray analysis of ovocleidin-17 a major protein of the Gallus gallus eggshell calcified layer AB - In this work. we report the crystallization of ovocleidin-17. the major protein of the avian eggshell calcified layer and the preliminary X-ray characterization of this soluble protein which is implied into the CaCO3 formation of the eggshell in avians, Crystals belong to one of the trigonal space group P3 with cell dimensions a = b = 59.53 Angstrom and c = 83.33 Angstrom, and alpha = beta = 90degrees and gamma = 120degrees. Crystals diffract up to 3.0 Angstrom MH - United Kingdom MH - Mexico|Distrito Federal PB - HILVERSUM: BENTHAM SCIENCE PUBL LTD RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0929-8665 UR - ISI:000175843000008 SO - Protein and Peptide Letters 2002 ;9(3):253-257 6578 UI - 9049 AU - Reyes-Valdes MH AU - Williams CG AD - Univ Autonoma Agraria Antonio Narro, Dept Fitomejoramiento, Saltillo 25315, Coahuila, MexicoTexas A&M Univ, Fac Genet, College Stn, TX 77843, USAReyes-Valdes, MH, Univ Autonoma Agraria Antonio Narro, Dept Fitomejoramiento, Saltillo 25315, Coahuila, Mexico TI - A haplotypic approach to founder-origin probabilities and outbred QTL analysis AB - Founder-origin probability methods are used to trace specific chromosomal segments in individual offspring. A haplotypic method was developed for calculating founder-origin probabilities in three-generation outbred pedigrees suited to quantitative trait locus (QTL) analysis. Estimators for expected founder-origin proportions were derived for a linkage group segment, an entire linkage group and a complete haplotype. If the founders are truly outbred, the haplotypic method gives a close approximation when compared with the Haley et al. (1994) method that simultaneously uses all marker information for QTL analysis, and it is less computationally demanding. The chief limitation of the haplotypic method is that some information in two-allele intercross marker-type configurations is ignored. Informativeness of marker arrays is discussed in the framework of founder-origin probabilities and proportions. The haplotypic method can be extended to more complex pedigrees with additional generations MH - Mexico|Coahuila MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6723 UR - ISI:000181272900009 L2 - QUANTITATIVE TRAIT LOCI; FLANKING MARKERS; LINE CROSSES; PROPORTION; PROGRAMS; MODEL SO - Genetical Research 2002 ;80(3):231-236 6579 UI - 10169 AU - Reyes H AU - Munoz BM AU - Farfan N AU - Santillan R AU - Rojas-Lima S AU - Lacroix PG AU - Nakatani K AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Unidad Univ, Pachuca 42076, Hidalgo, MexicoCNRS, Chim Coordinat Lab, F-31077 Toulouse, FranceEcole Normale Super, CNRS, UMR 8531, Lab Photophys & Photochim Supramol & Macromol, F-94235 Cachan, FranceFarfan, N, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Synthesis, crystal structures, and quadratic nonlinear optical properties in a series of push pull boronate derivatives AB - A series of eighteen new push pull molecules obtained by self-assembly of salicylideniminophenols and various phenylboronic acids is reported. Electric field-induced second-harmonic measurements of the nonlinear optical response reveal that the nature of the phenylboron moieties has a modest influence on the molecular hyperpolarizabilities (beta). The crystal data available suggest the possibility of easy rotation of the phenyl substituents, with an energy barrier around 10 kcal mol(-1), while a computational investigation conducted at the semi-empirical ( INDO) level leads to a prediction of 30% beta-modulation occuring upon the rotation MH - France MH - Mexico|Distrito Federal MH - Mexico|Hidalgo PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000178250400012 L2 - CONJUGATED ORGANIC-MOLECULES; HETEROTOPIC HOST MOLECULES; HYPERPOLARIZABILITY; 2ND; COMPLEXES; DONOR; PHOTOISOMERIZATION; BINDING; DESIGN; GUESTS SO - Journal of Materials Chemistry 2002 ;12(10):2898-2903 6580 UI - 11000 AU - Reyes JGG AU - la-Venezia L AU - Alvarez MGL AD - Univ Autonoma Sinaloa, Fac Ciencias Mar, Mazatlan 82000, Sinalao, MexicoIst Biol Mare, CNR, I-30122 Venice, ItalyReyes, JGG, Univ Autonoma Sinaloa, Fac Ciencias Mar, Paseo Claussen S-N, Mazatlan 82000, Sinalao, Mexico TI - Effect of some organophosphorus pesticides on oxygen consumption of shrimp, Litopenaeus vannamei AB - Oxygen consumption was measured in adult specimens of Litopenaeus vannamei shrimps from a coastal lagoon of Sinaloa, Mexico, during exposure to sublethal concentrations of the organophosphorus pesticides, Diazinon, Folidol, and Gusathion. Each individual was used as a control of itself, to avoid differences between treatments being masked by individual variability. In all three treatments with pesticides, respiration rate, measured by a polarographic electrode, was significantly lower than in controls. This may, at least partly, explain the decrease in shrimp production observed in recent years in the coastal lagoons of Sinaloa. (C) 2002 Elsevier Science (USA) MH - Italy MH - Mexico|Sinaloa PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0147-6513 UR - ISI:000176103800008 L2 - organophosphorus pesticides;oxygen consumption;shrimp;California Gulf;WATER; SEDIMENTS; LAGOON; MEXICO SO - Ecotoxicology and Environmental Safety 2002 ;52(2):134-136 6581 UI - 10741 AU - Reyes JL AU - Lamas M AU - Martin D AU - Namorado MD AU - Islas S AU - Luna J AU - Tauc M AU - Gonzalez-Mariscal L AD - CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07000, DF, MexicoUniv Nice, Lab Physiol Cellulaire & Mol, Nice, FranceGonzalez-Mariscal, L, CINVESTAV, Dept Physiol Biophys & Neurosci, Ave Politecn Nacl 2508, Mexico City 07000, DF, Mexico TI - The renal segmental distribution of claudins changes with development AB - Background. Permeability properties of mammalian nephron are tuned during postnatal maturation. The transepithelial electrical resistance (TER) and complexity of tight junctions (TJs) vary along the different tubular segments, suggesting that the molecules constituting this structure change. We studied the differential expression of occludin and several claudins in isolated renal tubules from newborn and adult rabbits. Methods. Isolated renal tubules from newborn and adult rabbits were processed for occludin, claudin-1 and claudin-2 immunofluorescence, and Western blot detection of claudin-1 and -2. Claudin-5 was detected in whole kidney frozen sections. RT-PCR from isolated tubules was performed for claudins-1 to -8. Results. Immunofluorescence revealed that occludin, claudin-1 and -2 were present at the cell boundaries at the neonatal stage of development. Claudin-1 was detected in the tighter segments of the nephron (distal and collecting duct), while claudin-2 was found in the leaky portions (proximal). Claudin 5 was found in the kidney vasculature. PCR amplification revealed the presence of claudins-1 to -4 in tubules of newborns. In adults, claudins-1, -2 and -4 were present in proximal, Henle's loop and collecting segments; claudin-3 was in proximal and collecting tubules, while claudins-5 and -6 were absent from all tubular portions. Claudin-7 was restricted to proximal tubules, while claudin-8 was present in proximal and Henle's segments. Conclusions. The pattern of occludin distribution is present from the neonatal age. Claudins-7 and -8 are up-regulated after birth. Each tubular segment expresses a peculiar set of claudins that might be responsible for the permeability properties of their TJs MH - France MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 55 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000176746600012 L2 - occludin;nephron permeability;tight junction;postnatal maturation;kidney tubules;growth and development;TIGHT-JUNCTION STRANDS; INTEGRAL MEMBRANE-PROTEINS; THICK ASCENDING LIMB; ENDOTHELIAL-CELLS; ELECTRICAL-RESISTANCE; ZONULAE-OCCLUDENTES; COLLECTING TUBULES; BARRIER FUNCTION; PROXIMAL TUBULE; RABBIT KIDNEY SO - Kidney International 2002 ;62(2):476-487 6582 UI - 11963 AU - Reyes MEP AU - Barahona EEC AU - Cahuich MB AU - Barragan A AU - Malina RM AD - Michigan State Univ, Dept Kinesiol, E Lansing, MI 48824, USAEscuela Nacl Antropol & Hist, Mexico City, DF, MexicoMalina, RM, Michigan State Univ, Dept Kinesiol, 128 IM Sports Circle, E Lansing, MI 48824 USA TI - Growth status of children 6-12 years from two different geographic regions of Mexico AB - Primary objectives: The purposes of the study are to assess the growth status of urban Mexican children living in difference geographic areas of the country, to estimate the prevalence of overweight and obesity, and to explore secular trends in body size. Design: Cross-sectional surveys of 293 children 6-11 years from Sonora in the north-west of the country (155 boys, 138 girls), and 356 children 7-12 years from Veracruz on the Gulf Coast (194 boys, 162 girls) were undertaken in 1992 and 1993, respectively. Procedures: Height and weight were measured; the body mass index (BMI, kg m(-2),) was calculated, Growth status was compared to USA reference data and to samples of Mexican children in 1926 and 1975. The prevalence of overweight (BMI greater than or equal to 85th and < 95th percentiles, and obesity (BMI > 95th percentile) was estimated. Results: Girls and boys from Sonora and Veracruz do not differ in height, weight and the BMI. Mean heights are at (girls) or below (boys) the medians of USA growth charts, while mean weights are at (boys) or just below (girls) the 75th percentiles at most ages. As a result, mean BMIs are above (boys) and below (girls) the 75th percentiles over the age range studied. The prevalence of overweight and obesity is 40% in boys and 35% in girls, whereas the prevalence of obesity per se is 23% in boys and 17% in girls, Compared to urban Mexican children in the Federal District surveyed in 1926, children in the present sample are taller and heavier, but the secular trend in body weight is more pronounced since the mid 1960s. Heights of the current samples are similar to those of well-off children in Mexico City in the early 1970s, but weights are heavier. Conclusions: The gap in height between well-off and lower socioeconomic status chidren in different regions of Mexico has been reduced, but there is an increase in the prevalence of overweight and obesity MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 9 U4 - Biology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0301-4460 UR - ISI:000173447800002 L2 - OVERWEIGHT; POPULATION; FATNESS SO - Annals of Human Biology 2002 ;29(1):11-25 6583 UI - 11717 AU - Reynolds WF AU - Enriquez RG AD - Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, CanadaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04100, DF, MexicoReynolds, WF, Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada TI - Choosing the best pulse sequences, acquisition parameters, postacquisition processing strategies, and probes for natural product structure elucidation by NMR spectroscopy AB - The relative merits of different pairs of two-dimensional NMR pulse sequences (COSY-90 vs, COSY-45, NOESY vs T-ROESY, HSQC vs HMQC, HMBC vs CIGAR, etc.) are compared and recommendations are made for the preferred choice of sequences for natural product structure elucidation. Similar comparisons are made between different selective ID sequences and the corresponding 2D sequences. Many users of 2D NMR use longer than necessary relaxation delays and neglect to use forward linear prediction processing. It is shown that using shorter relaxation delays in combination with forward linear prediction allows one to get better resolved spectra in less time. The relative merits of different probes and likely future probe developments are also discussed MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 36 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 0163-3864 UR - ISI:000174048900026 L2 - HETERONUCLEAR SHIFT CORRELATION; BOND CORRELATION SPECTROSCOPY; TWO-DIMENSIONAL NMR; NUCLEAR MAGNETIC-RESONANCE; HIGH-RESOLUTION NMR; POLARIZATION TRANSFER; FIELD GRADIENTS; COUPLING-CONSTANTS; TOTAL ASSIGNMENT; IMPROVED SENSITIVITY SO - Journal of Natural Products 2002 ;65(2):221-244 6584 UI - 11730 AU - Ribaut JM AU - Jiang C AU - Hoisington D AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoMonsanto Life Sci Res Ctr, St Louis, MO 63198, USARibaut, JM, CIMMYT, Int Maize & Wheat Improvement Ctr, Lisboa 27,Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Simulation experiments on efficiencies of gene introgression by backcrossing AB - Designing a highly efficient backcross (BC) marker-assisted selection (MAS) experiment is not a straightforward exercise, efficiency being defined here as the ratio between the resources that need to be invested at each generation and the number of generations required to achieve the selection. This paper presents results of simulations conducted for different strategies, using the maize genome as a model, to compare allelic introgression with DNA markers through BCs. Simulation results indicate that the selection response in the BC1 could be increased significantly when the selectable population size (N-sl) is <50, and that a diminished return is observed when this number >100. Selectable population size is defined as the number of individuals with favorable alleles at the target loci from which selection with markers can be carried out on the rest of the genome at nontarget loci, simulations considered the allelic introgression at one to five target loci, with different population sizes, changes in the recombination frequency between target loci and flanking markers, and different numbers of genotypes selected at each generation. For an introgression at one target locus in a partial line conversion, and using MAS at nontarget loci only at one generation, a selection at BC3 would be more efficient than a selection at BC1 or BC2, due to the increase over generations of the ratio of the standard deviation to the mean of the donor genome contribution. With selection only for the presence of a donor allele at one locus in BC1 and BC2, and MAS at BC3, lines with <5% of the donor genome can be obtained with a N-sl of 10 in BC1 and BC2, and 100 in BC3. These results are critical in the application of molecular markers to introgress elite alleles as part of plant improvement programs MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 23 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000174093500034 L2 - MARKER-ASSISTED SELECTION; BREEDING PROGRAMS; COMPUTER-SIMULATION; QUANTITATIVE TRAITS; STRATEGIES; TOOLS; POPULATIONS; IMPROVEMENT; PROPORTION; LINES SO - Crop Science 2002 ;42(2):557-565 6585 UI - 9795 AU - Ricalde RHS AU - Lean IJ AD - UADY, Fac Med Vet & Zootecn, Yucatan 97000, MexicoUniv London Wye Coll, Ashford TN25 5AH, Kent, EnglandRicalde, RHS, UADY, Fac Med Vet & Zootecn, Apartado Postal 4-116 Itzimna, Yucatan 97000, Mexico TI - Effect of feed intake during pregnancy on productive performance and grazing behaviour of primiparous sows kept in an outdoor system under tropical conditions AB - Twenty-four primiparous sows were allocated randomly in four blocks distributed through a year to evaluate the effect of feeding level on productive performance and grazing behaviour of primiparous pregnant sows kept outdoors under tropical conditions. Three diets designed to supply 19 (L), 26 (M) and 33 (H) MJ of DE/day were used. The sows had opportunity to graze freely in a paddock of star grass (SG). Total weight gain (kg) from mating to weaning increased linearly as feeding level increased (L: 30.5, M: 36.3, H: 48.7; P < 0.05). However, sows in treatment L had a negative balance in back fat depth (mm) (L: - 1.3, M: 0.5 H: 3.6; P < 0.05) during the same period. Time spent grazing (min/day) (L: 130.4, M: 96. 1, H: 67.8; P < 0.05) grazing activity (%) (L: 17.4, M: 13.2, H: 9.2; P < 0.05) and distances walked (meters) (L: 305.8, M: 185.8, H: 169.8; P < 0.05) reduced significantly with dietary energy intake. Rectal temperature (T) increased significantly (P < 0.05) as energy intake increased (L: 38.9, M: 39.1, H: 39. 1; P < 0.05). The average ambient temperature recorded during daytime in block IV was higher (34.0 &DEG;C) than average ambient temperature recorded in block I (29.6 &DEG;C), II (29.5 &DEG;C) and III (28.8 &DEG;C). There was a significant (P < 0.05) treatment X block (season) interaction for distance walked. Also, a significant (P < 0.05) block X days of pregnancy (D) interaction for grazing time, distances walked and rectal temperature. In our experimental conditions, 26 MJ DE/day was sufficient to ensure live weight gain and back fat gain during pregnancy in primiparous sows. Increases in feed intake during pregnancy reduced grazing behaviour during daytime and increased the rectal temperature. The interactions observed suggested that extremely high ambient temperature had more effect on grazing behaviour and body temperature than energy intake in pregnant sows kept outdoors under tropical conditions. © 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0301-6226 UR - ISI:000179264900002 L2 - pig-feeding and nutrition;tropical environment;digestible energy;pregnancy;grazing;ENVIRONMENTAL-TEMPERATURE; REPRODUCTIVE-PERFORMANCE; AMBIENT-TEMPERATURE; ENERGY-METABOLISM; BODY RESERVES; GROWING PIGS; FEMALE PIGS; GROWTH; NUTRITION; PROTEIN SO - Livestock Production Science 2002 ;77(1):13-21 6586 UI - 10855 AU - Richman AD AU - Herrera LG AU - Nash D AD - MSU, Dept Plant Sci, Bozeman, MT 59719, USAUniv Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoRichman, AD, MSU, Dept Plant Sci, Bozeman, MT 59719, USA TI - Characterization of Peromyscus MHC class II beta sequences by ligation-anchored RT PCR and denaturing gradient gel electrophoresis AB - We characterized MHC class II beta sequences in deer-mice (genus Peromyscus), which are amongst the most common mammals in North America. We find evidence for two different families of class II beta loci, most closely related to either the A-type or E-type loci in Mus. Population studies suggest the presence of more than one A-type locus but only one E-type locus for the species investigated MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Genetics & Heredity;Immunology U5 - J;Article AV - English IS - 0960-7420 UR - ISI:000176439100003 L2 - LEUCOPUS; ANTIGEN; GENES SO - European Journal of Immunogenetics 2002 ;29(3):213-217 6587 UI - 10645 AU - Richter RB AU - Salazar G AD - Univ Waterloo, Fac Math, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, CanadaUASLP, IICO, San Luis Potosi 78210, SLP, MexicoRichter, RB, Univ Waterloo, Fac Math, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, Canada TI - The crossing number of P(N,3) AB - It is proved that the crossing number of each Generalized Petersen Graph P(3k + h) is k + h if h is an element of {0,2} and k + 3 if h = 1, for each k greater than or equal to 3, with the single exception of P(9, 3), whose crossing number is 2 MH - Canada MH - Mexico|San Luis Potosi PB - TOKYO: SPRINGER-VERLAG TOKYO RP - NOT IN FILE U3 - TC 9 U4 - Mathematics U5 - J;Article AV - English IS - 0911-0119 UR - ISI:000176993400016 L2 - GENERALIZED PETERSEN GRAPHS SO - Graphs and Combinatorics 2002 ;18(2):381-394 6588 UI - 11408 AU - Rico-Ramirez V AU - Westerberg AW AD - Carnegie Mellon Univ, Inst Complex Engineered Syst, Pittsburgh, PA 15213, USACarnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoWesterberg, AW, Carnegie Mellon Univ, Inst Complex Engineered Syst, Pittsburgh, PA 15213 USA TI - Structural analysis of conditional models AB - Structural analysis is applied to exploit sparsity in the solving of a system of equations [Direct Methods for Sparse Matrices. Monographs on Numerical Analysis (1989)]. Zaher [Conditional modeling (1995)] studied the issues involved in the structural analysis of conditional models and presented a methodology to ensure consistency in a conditional model, the complexity of such an analysis being combinatorial. In that work Zaher considered only cases in which the number of variables and equations of all the alternatives in a conditional model are the same. In this paper, an extension to Zaher's consistency analysis is presented. This extension allows the consistency analysis to be applied to the conditional models in which the number of variables and equations for each of the alternatives may not be the same. Also, we show how, by taking advantage of the structure of the problem, it is sometimes possible to reduce the combinatorial effort required by such an analysis. In particular, the cases of the existence of repeated structures and common incidence pattern among alternatives are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000174909200002 L2 - structural analysis;variable partitioning;conditional models SO - Computers & Chemical Engineering 2002 ;26(3):359-373 6589 UI - 11409 AU - Rico-Ramirez V AU - Westerberg AW AD - Carnegie Mellon Univ, Inst Complex Engineered Syst, Dept Chem Engn, Pittsburgh, PA 15213, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoWesterberg, AW, Carnegie Mellon Univ, Inst Complex Engineered Syst, Dept Chem Engn, Pittsburgh, PA 15213 USA TI - Interior point methods for the solution of conditional models AB - Interior point methods have recently become an interesting alternative in a number of numerical applications. In particular, their performance in the solution of problems involving complementarity equations has been the subject of extensive research and their efficacy is well documented. In this paper, following a brief description of the fundamentals of interior point methods and the globally convergent framework proposed by Wang et al. (Mathematical Programming 74 (1996) 159), we show how we can apply such an algorithm for solving the complementarity representation of a conditional model (Industrial Engineering and Chemical Research 38 (1999) 519), where such models involve sums of complementary products being zero. Furthermore, we modified Wang's algorithm in order to apply a high order strategy designed to improve convergence (SIAM Journal of Optimization 2 (1992) 575). We then use the proposed approach to solve some conditional models encountered in the field of chemical engineering. This technique has been incorporated into the ASCEND modeling environment with the implementation of the solver IPSLV. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000174909200003 L2 - interior point methods;complementarity formulation;conditional models;EQUATIONS SO - Computers & Chemical Engineering 2002 ;26(3):375-383 6590 UI - 9789 AU - Riestra AR AU - Womack KB AU - Crucian GP AU - Heilman KM AD - Natl Ctr Environm Hlth, Natl Inst Publ Hlth, Mexico City, DF, MexicoUniv Florida, Dept Neurol, Gainesville, FL, USAMalcolm Randall Vet Adm Med Ctr, Gainesville, FL, USARiestra, AR, Avenida San Antonio 158,Piso 7,Colonia Ciudad Dep, Mexico City 03710, DF, Mexico TI - Is the middle between both halves? Midpoint location and segment size estimation in neglect AB - Background: Line bisection errors in neglect are attributed to perceptual size distortions. In order to compare the two segments of the line to determine if they are equal, one might first estimate the location of a midpoint that defines the two line segments to be compared. Objectives: The authors attempted to determine whether estimating a line's midpoint can be dissociated from comparing the two segments of this line, and if so, what the relative contribution of each of these tasks is to the perceptual bias in neglect. Methods: The authors studied two patients with hemispatial neglect from right hemisphere lesions by asking them where bisection marks were placed on prebisected lines and whether the two adjacent line segments were equal. Results: There was a stronger bias judging the position of the bisecting marks ("where" determination) than comparing the size of two adjacent line segments. Conclusions: These results suggest that percepibal size distortion of line segments alone cannot explain the subjects' line bisection bias, but postperceptual deficits in "where" computations may better account for their errors locating the midpoint. "Where" determinations might require more attentional capacity, depend more heavily on viewer-centered allocation of attention, and be mediated by the right hemisphere's "where" dorsal stream. In contrast, comparing the length of two segments might be mediated by the left hemisphere's "what" ventral stream MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0028-3878 UR - ISI:000179370800021 L2 - UNILATERAL SPATIAL NEGLECT; LINE BISECTION JUDGMENTS; VISUAL NEGLECT; HEMISPATIAL NEGLECT; FUNCTIONAL-ANATOMY; LEFTWARD SEARCH; LANDMARK TASK; OBJECTS; SPACE; MECHANISMS SO - Neurology 2002 ;59(10):1580-1584 6591 UI - 10929 AU - Ringman JM AU - az-Olavarrieta C AU - Rodriguez T AU - Fairbanks L AU - Cummings JL AD - Univ Calif Irvine, Sch Med, Dept Neurol, Irvine, CA, USANatl Inst Neurol & Neurosurg, Expt Psychol Lab, Mexico City, DF, MexicoUniv Calif Los Angeles, Sch Med, Dept Neurol, Los Angeles, CA 90024, USAUniv Calif Los Angeles, Sch Med, Dept Psychiat & Behav Sci, Los Angeles, CA 90024, USARingman, JM, 101 City Dr S Bldg 53,Room 203, Orange, CA 92868, USA TI - The prevalence and correlates of neuropsychiatric symptoms in a population with Parkinson's disease in Mexico AB - Objective: To study the incidence of behavioral abnormalities in patients with Parkinson's disease (PD) and extend them to a Mexican population. Background: Reports from the US and Europe suggest depression, anxiety, and apathy occur with increased frequency in PD, but data on the occurrence of neuropsychiatric symptoms in patients with PD in Latin America are lacking. Methods: The investigators performed a cross-sectional survey of psychiatric symptoms and cognitive status in 40 patients with PD and 83 controls in Mexico City. Results: Results were compared between groups and correlations sought between symptoms and disease variables. Patients with PD had a higher rate of dysphoria, anxiety, and apathy (p < 0.001). Within the patients, with PD, there was a positive correlation between disease severity (rho = 0.496), age (rho 0.340), and degree of self-rated depression. Conclusions: This study confirmed the observation previously described in other PD populations of increased rates of dysphoria, anxiety, and apathy in Mexican patients with PD. We found no relation between disease duration, severity, cognitive impairment, and neuropsychiatric symptoms as measured on the Neuropsychiatric Inventory, possibly a result of the relative lack of advanced cases in our population MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 5 U4 - Clinical Neurology;Psychiatry;Psychology U5 - J;Article AV - English IS - 0894-878X UR - ISI:000176107500005 L2 - MINI-MENTAL-STATE; ALZHEIMER TYPE; DEPRESSION; HALLUCINATIONS; INVENTORY; DEMENTIA; ANXIETY; SPANISH; AGE SO - Neuropsychiatry Neuropsychology and Behavioral Neurology 2002 ;15(2):99-105 6592 UI - 9647 AU - Rios-Mercado RZ AU - Wu SM AU - Scott LR AU - Boyd EA AD - Univ Autonoma Nuevo Leon, Grad Program Syst Engn, San Nicolas De Los Garza 66450, NL, MexicoKnowledge Syst Inc, Stafford, TX 77497, USAUniv Chicago, Dept Comp Sci, Chicago, IL 60637, USAPROS Revenue Management, Houston, TX 77006, USARios-Mercado, RZ, Univ Autonoma Nuevo Leon, Grad Program Syst Engn, AP 111-F,Cd Univ, San Nicolas De Los Garza 66450, NL, Mexico TI - A reduction technique for natural gas transmission network optimization problems AB - We address the problem of minimizing the fuel consumption incurred by compressor stations in steady-state natural gas transmission networks. In the practical world, these type of instances are very large, in terms of the number of decision variables and the number of constraints, and very complex due to the presence of non-linearity and non-convexity in both the set of feasible solutions and the objective function. In this paper we present a study of the properties of gas pipeline networks, and exploit them to develop a technique that can be used to reduce significantly problem dimension, without disrupting problem structure, making it more amenable to solution MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0254-5330 UR - ISI:000179770500013 L2 - natural gas;pipeline optimization;transmission networks;preprocessing;PIPELINE SO - Annals of Operations Research 2002 ;117(1-4):217-234 6593 UI - 10513 AU - Ripepi V AU - Palla F AU - Marconi M AU - Bernabei S AU - Ferro AA AU - Terranegra L AU - Alcala JM AD - Osserv Astron Capodimonte, I-80131 Naples, ItalyOsserv Astrofis Arcetri, I-50125 Florence, ItalyOsservatorio Astron Bologna, I-40127 Bologna, ItalyUniv Laguna, Dept Astrofis, San Cristobal la Laguna 30071, SpainNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoRipepi, V, Osserv Astron Capodimonte, Via Moiariello 16, I-80131 Naples, Italy TI - Detection of delta Scuti-like pulsation in H254, a pre-main sequence F-type star in IC 348 AB - We present time series observations of intermediate mass PMS stars belonging to the young star cluster IC 348. The new data reveal that a young member of the cluster, H254, undergoes periodic light variations with delta Scuti-like characteristics. This occurrence provides an unambiguous evidence confirming the prediction that intermediate-mass pre-main sequence (PMS) stars should experience this transient instability during their approach to the main-sequence. On the basis of the measured frequency f = 7.406 d(-1), we are able to constrain the intrinsic stellar parameters of H254 by means of linear, non adiabatic, radial pulsation models. The range of the resulting luminosity and effective temperature permitted by the models is narrower than the observational values. In particular, the pulsation analysis allows to derive an independent estimate of the distance to IC 348 of about 320 pc. Further observations could either confirm the monoperiodic nature of H254 or reveal the presence of other frequencies MH - Italy MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000177402100020 L2 - stars : variables : delta Scuti;stars : oscillations;stars : fundamental parameters;stars : pre-main sequence;HERBIG AE STAR; YOUNG CLUSTER IC-348; LIGHT VARIABILITY; V351 ORI; PHOTOMETRY; HR-5999 SO - Astronomy & Astrophysics 2002 ;391(2):587-593 6594 UI - 7907 AU - Riquelme C AU - Lopez-Casillas F AU - Brandan E AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoCatholic Univ Chile, Santiago, Chile TI - Decorin null myoblasts are less sensitive to TGF-beta biological activity MH - Chile MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000179569101916 SO - Molecular Biology of the Cell 2002 ;13():340A-341A 6595 UI - 9877 AU - Riquelme M AU - Roberson RW AU - McDaniel DP AU - Bartnicki-Garcia S AD - Arizona State Univ, Dept Plant Biol, Mol & Cellular Biol Program, Tempe, AZ 85287, USAUniv Calif Riverside, Dept Plant Pathol, Riverside, CA 92521, USAArizona State Univ, Dept Biol, Wm Keck Bioimaging Lab, Tempe, AZ 85287, USACICESE, Ensenada 22830, Baja California, MexicoRoberson, RW, Arizona State Univ, Dept Plant Biol, Mol & Cellular Biol Program, Tempe, AZ 85287 USA TI - The effects of ropy-1 mutation on cytoplasmic organization and intracellular motility in mature hyphae of Neurospora crassa AB - We have used light and electron microscopy to document the cytoplasmic effects of the ropy (ro-1) mutation in mature hyphae of Neurospora crassa and to better understand the role(s) of dynein during hyphal tip growth. Based on video-enhanced DIC light microscopy, the mature, growing hyphae of N. crassa wild type could be divided into four regions according to cytoplasmic organization and behavior: the apical region (1) and three subapical regions (11, 111, and IV). A well-defined Spitzenkorper dominated the cytoplasm of region 1. In region 11, vesicles (similar to0.48 mum diameter) and mitochondria maintained primarily a constant location within the advancing cytoplasm. This region was typically void of nuclei. Vesicles exhibited anterograde and retrograde motility in regions III and IV and followed generally parallel paths along the longitudinal axis of the cell. A small population of mitochondria displayed rapid anterograde and retrograde movements, while most maintained a constant position in the advancing cytoplasm in regions III and IV. Many nuclei occupied the cytoplasm of regions III and IV. In ro-1 hyphae, discrete cytoplasmic regions were not recognized and the motility and/or positioning of vesicles, mitochondria, and nuclei were altered to varying degrees, relative to the wild type cells. Immunofluorescence microscopy revealed that the microtubule cytoskeleton was severely disrupted in ro-1 cells. Transmission electron microscopy of cryofixed cells confirmed that region I of wild-type hyphae contained a Spitzenkorper composed of an aggregation of small apical vesicles that surrounded entirely or partially a central core composed, in part, of microvesicles embedded in a dense granular to fibrillar matrix. The apex of ro-1 the hypha contained a Spitzenkorper with reduced numbers of apical vesicles but maintained a defined central core. Clearly, dynein deficiency in the mutant caused profound perturbation in microtubule organization and function and, consequently, organelle dynamics and positioning. These perturbations impact negatively on the organization and stability of the Spitzenkorper, which, in turn, led to severe reduction in growth rate and altered hyphal morphology. (C) 2002 Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Baja California PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 19 U4 - Genetics & Heredity;Mycology U5 - J;Article AV - English IS - 1087-1845 UR - ISI:000179218100004 L2 - Neurospora crassa;Ropy;dynein;laser scanning confocal microscopy;microtubules;Spitzenkorper;ultrastructure;video-enhanced light microscopy;DYNEIN HEAVY-CHAIN; NUCLEAR-DISTRIBUTION; FILAMENTOUS FUNGI; MUTANTS; MORPHOGENESIS; DYNACTIN; GROWTH; SPITZENKORPER; LOCALIZATION; MIGRATION SO - Fungal Genetics and Biology 2002 ;37(2):171-179 6596 UI - 10312 AU - Rito-Palomares M AU - Middelberg APJ AD - Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, EnglandRito-Palomares, M, ITESM, Dept Tecnol Alimentos, Ave Eugenio Garza Sada 2504 Sur, Monterrey 64849, NL, Mexico TI - Aqueous two-phase systems for the recovery of a recombinant viral coat protein from Escherichia coli AB - In this study the use of an aqueous two-phase system (ATPS) following the direct chemical extraction of a recombinant viral coat protein, from the cytoplasm of Escherichia coli, is evaluated. The driving force is the need to establish an economically-viable process for the manufacture of a vaccine against human papilloma infection. The partition behaviour of recombinant L1 protein, the major structural protein of the virus, and DNA was investigated in a polyethylene glycol (PEG)phosphate system. An evaluation of system parameters including PEG molecular mass and the concentrations of PEG and phosphate was conducted, to estimate conditions under which the L1 protein and DNA partition to opposite phases. ATPS extraction comprising a volume ratio of 1.00, PEG 1000 (18.0%(w/w)) and phosphate (15.0%(w/w)) provided the conditions for accumulation of DNA into the bottom phase and concentration of L1 protein into the opposite phase (ie partition coefficient of DNA; In K-DNA<0.0 and partition coefficient of L1; In K-L1>2.5). The findings reported here demonstrate the potential of ATPS to recover recombinant protein released from E coli by direct chemical extraction. (C) 2002 Society of Chemical Industry MH - United Kingdom MH - Mexico|Nuevo Leon PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0268-2575 UR - ISI:000177844400006 L2 - aqueous two-phase systems;protein recovery;chemical extraction;VIRUS-LIKE PARTICLES; HUMAN-PAPILLOMAVIRUS; 2-PHASE SYSTEMS; EXTRACTION; PARAMETERS SO - Journal of Chemical Technology and Biotechnology 2002 ;77(9):1025-1029 6597 UI - 10340 AU - Rito-Palomares M AD - Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, EnglandITESM, Dept Tecnol Alimentos, Monterrey 64849, NL, MexicoRito-Palomares, M, Univ Cambridge, Dept Chem Engn, Pembroke St, Cambridge CB2 3RA, England TI - The practical application of aqueous two-phase processes for the recovery of biological products AB - Although the generic implementation of aqueous two-phase systems (ATPS) processes for the recovery of biological products has been exploited for several years, this has not resulted in a wide adoption of the technique. The main reasons involve the poor understanding of the mechanism governing phase formation and the behavior of solute partitioning in ATPS processes, the cost of phase forming polymers, and the necessary extended time to optimize the technique. In this review paper, some of the practical disadvantages attributed to ATPS are addressed. The practical approach exploited to design ATPS processes, the application to achieve process integration, the extended use for the recovery of high-value products, and the recent development of new low-cost ATPS, are discussed. It is proposed that the trend of the practical application of ATPS processes for the recovery of biological products will involve the purification of new high-value bioparticulate products with medical applications. Such a trend will give new impetus to the technique, and will draw attention from industries needing to develop new, and improve existing, commercial processes MH - United Kingdom MH - Mexico|Nuevo Leon PB - SEOUL: KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Hardware Review AV - English IS - 1017-7825 UR - ISI:000177720400001 L2 - ATPS processes;recovery of biological products;proteins;process integration;2-PHASE SYSTEMS; POLY(ETHYLENE GLYCOL); ESCHERICHIA-COLI; EXTRACTIVE FERMENTATION; PROTEIN-PURIFICATION; BIPHASIC SYSTEMS; WHEY PROTEINS; LACTIC-ACID; SEPARATION; POLYMER SO - Journal of Microbiology and Biotechnology 2002 ;12(4):535-543 6598 UI - 10453 AU - Rito-Palomares M AU - Lyddiatt A AD - ITESM, Ctr Biotecnol, Monterrey 64849, NL, MexicoUniv Birmingham, Sch Chem Engn, Ctr Bioproc Engn, Biochem Recovery Grp, Birmingham B15 2TT, W Midlands, EnglandRito-Palomares, M, ITESM, Ctr Biotecnol, Avenida Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - Process integration using aqueous two-phase partition for the recovery of intracellular proteins AB - This paper presents an integrated process for the primary recovery of intracellular glyceraldehyde 3-phosphate dehydrogenase (G3PDH) and other proteins from bakers' yeast wherein cell disruption and aqueous two-phase systems (ATPS) were operated simultaneously. Polyethylene glycol and potassium phosphate were added to the cell suspension before disruption such that the bead mill was exploited as both cell disrupter and product extractor. The partition behaviour of both bulk protein and G3PDH for the integrated process was similar to that for a conventional process in which cell disruption and ATPS extraction were operated as discrete unit operations. The target products concentrated in the upper phase for all the systems evaluated. However, the cell debris generated during the integrated process also concentrated in the upper phase which limited the potential application of the system. Subsequent evaluation of the variation of system volume ratio (V-r) with the partition behaviour of cell debris recommended process conditions (i.e. PEG 12% (w/w), phosphate 28% (w/w), V-r = 0.45, pH = 7.0) suitable for the primary recovery of intracellular proteins from debris. The results are discussed in the context of the practical potential of the direct integration of ATPS with cell disruption processes. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Nuevo Leon PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 1385-8947 UR - ISI:000177584300004 L2 - cell disruption;aqueous two-phase;bead mill;protein recovery;process integration;intracellular proteins;glyceraldehyde 3-phosphate dehydrogenase;CELL DISRUPTION; 2-PHASE SYSTEMS; PARAMETERS SO - Chemical Engineering Journal 2002 ;87(3):313-319 6599 UI - 10027 AU - Rivas L AU - Quintero L AU - Fourrey JL AU - Benhida R AD - Univ Autonoma Puebla, Ctr Invest, Fac Ciencias Quim, Puebla 72570, MexicoInst Chim Subst Nat, CNRS, F-91128 Palaiseau, FranceUniv Nice, UMR CNRS 6001, Chim Bioorgan Lab, F-06108 Nice, FranceBenhida, R, Univ Autonoma Puebla, Ctr Invest, Fac Ciencias Quim, Puebla 72570, Mexico TI - A short synthesis of aspergillamide B. The marine natural product from Aspergillus sp AB - A short route to the marine natural product aspergillamide B has been developed. The key step is the stereoselective formation of the trans indole-enamide pharmacophore by indole-assisted dehydration front the functionalised aminoalcohol intermediate. HPLC and H-1 NMR analyses show that aspergillamide B is more stable in the cis rotamer form. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000178397400044 L2 - ENAMIDES SO - Tetrahedron Letters 2002 ;43(42):7639-7641 6600 UI - 11850 AU - Rivas R AU - Shapiro F AD - Childrens Hosp, Dept Orthopaed Surg, Orthopaed Res Lab, Boston, MA 02115, USACtr Nacl Rehabil, Mexico City, DF, MexicoRivas, R, Childrens Hosp, Dept Orthopaed Surg, Orthopaed Res Lab, 300 Longwood Ave,Enders 11, Boston, MA 02115 USA TI - Structural stages in the development of the long bones and epiphyses - A study in the New Zealand white rabbit AB - Background: Histologic delineation of the events involved in the development of long bones and the developmental age at which these events occur is needed to elucidate the genetic and molecular mechanisms associated with these events. This report describes the sequence of histologic events involved in the formation of long bones and their epiphyses in the New Zealand White rabbit. Methods: Prenatal studies were performed on twelve, fourteen, fifteen, sixteen, eighteen, twenty-one, twenty-four, and twenty-seven-day-old rabbit embryos, and postnatal studies were performed on newborn rabbits and on three-to-four-day-old; one, two, four, and six-week-old; and two, three, four, six, and eight-month-old rabbits. Histologic specimens from embryos were embedded in plastic and stained with toluidine blue or safranin O-fast green, and specimens from postnatal rabbits were embedded in paraffin and stained with hematoxylin and eosin or safranin O-fast green. Results: Studies of twelve-day-old embryos demonstrated upper and lower limb buds filled with undifferentiated mesenchymal cells, and studies of fourteen-day-old embryos showed mesenchymal condensation and beginning cartilage formation outlining major long bones. Long-bone and epiphyseal development progressed through sixteen structural stages, and the developmental age at which these stages occurred was determined. These stages included limb-bud formation with uniform distribution of mesenchymal cells and formation of an apical ectodermal ridge (stage 1); mesenchymal condensation (stage 2); cartilage differentiation (stage 3); formation of a primary center of ossification (stage 4a); epiphyseal cartilage vascularization with formation of cartilage canals (stage 7); vascular invasion of the developing secondary ossification center (stage 9); bone formation and marrow cavitation in the secondary ossification center with formation of hematopoietic marrow (stage 10); fullest relative extent of secondary-ossification-center development in epiphyseal cartilage (stage 14); thinning of the physis (stage 15); and resorption of the physis with establishment of continuity between epiphyseal and metaphyseal circulations (stage 16). Clinical Relevance: The detailed classification system presented here will allow for correlations between genetic and molecular mechanisms and histologic events in normal and abnormal development of long bones and their epiphyses. Many of the nonosseous structures formed during long-bone and epiphyseal development in the fetus, infant, and child are amenable to assessment with sonography and magnetic resonance imaging. An understanding of the histopathological features of developmental abnormalities of the long bones and their epiphyses revealed with newer imaging techniques should greatly improve management by allowing earlier diagnosis MH - USA MH - Mexico|Distrito Federal PB - NEEDHAM: JOURNAL BONE JOINT SURGERY INC RP - NOT IN FILE U3 - TC 25 U4 - Orthopedics;Surgery U5 - J;Article AV - English IS - 0021-9355 UR - ISI:000173573100013 L2 - PERICHONDRIAL OSSIFICATION GROOVE; CARTILAGE CANALS; SECONDARY CENTERS; LIMB DEVELOPMENT; INDIAN HEDGEHOG; GROWTH; DIFFERENTIATION; FEMUR; PROTEINS; BIOLOGY SO - Journal of Bone and Joint Surgery-American Volume 2002 ;84A(1):85-100 6601 UI - 11163 AU - Rivera-Becerril F AU - Calantzis C AU - Turnau K AU - Caussanel JP AU - Belimov AA AU - Gianinazzi S AU - Strasser RJ AU - Gianinazzi-Pearson V AD - Univ Bourgogne, INRA, UMR 1088, BBCE,IPM,CMSE, F-21065 Dijon, FranceUniv Geneva, Lab Bioenerget, CH-1254 Geneva, SwitzerlandJagiellonian Univ, Inst Bot, PL-31512 Krakow, PolandAll Russian Res Inst Agr Microbiol, St Petersburg 189620 8, RussiaUniv Autonoma Metropolitana Xochimilco, CBS, Dept Hombre & Ambiente, Mexico City 04960, DF, MexicoGianinazzi-Pearson, V, Univ Bourgogne, INRA, UMR 1088, BBCE,IPM,CMSE, BP 86510, F-21065 Dijon, France TI - Cadmium accumulation and buffering of cadmium-induced stress by arbuscular mycorrhiza in three Pisum sativum L. genotypes AB - The role of arbuscular mycorrhiza in reducing Cd stress was investigated in three genotypes of Pisum sativum L. (cv. Frisson, VIR4788, VIR7128), grown in soil/sand pot cultures in the presence and absence of 2-3 mg kg(-1) bioavailable Cd, and inoculated or not with the arbuscular mycorrhizal fungus Glomus intraradices. Shoot, root and pod biomass were decreased by Cd in non-mycorrhizal plants. The presence of mycorrhiza attenuated the negative effect of Cd so that shoot biomass and activity of photosystem II, based on chlorophyll a, fluorescence, were not significantly different between mycorrhizal plants growing in the presence or absence of the heavy metal (HM). Total P concentrations were not significantly different between mycorrhizal and non-mycorrhizal plants treated with Cd. From 20-50-fold more Cd accumulated in roots than in shoots of Cd-treated plants, and overall levels were comparable to other metal-accumulating plants. Genetic variability in Cd accumulation existed between the pea genotypes. Concentration of the HM was lowest in roots of VIR4788 and in pods of VIR4788 and VIR7128. G. intraradices inoculation decreased Cd accumulation in roots and pods of cv. Frisson, whilst high concentrations were maintained in roots and pods of mycorrhizal VIR7128. Shoot concentrations of Cd increased in mycorrhizal cv. Frisson and VIR4788. Sequestration of Cd in root cell walls and/or cytoplasm, measured by EDS/SEM, was comparable between non-mycorrhizal pea genotypes but considerably decreased in mycorrhizal cv. Frisson and VIR7128. Possible mechanisms for mycorrhiza buffering of. Cd-induced stress in the pea genotypes are discussed MH - France MH - Mexico|Distrito Federal MH - Poland MH - Russia MH - Switzerland PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 29 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000175444300018 L2 - cadmium;Glomus intraradices;pea genotypes;phytoremediation;HEAVY-METAL UPTAKE; PHASEOLUS-VULGARIS; MAIZE SEEDLINGS; LOW-TEMPERATURE; GLOMUS-MOSSEAE; PLANTS; ROOTS; FLUORESCENCE; FUNGI; PHOTOSYNTHESIS SO - Journal of Experimental Botany 2002 ;53(371):1177-1185 6602 UI - 11049 AU - Rivera A AU - Torres OL AU - Leiton JD AU - Morales-Rios MS AU - Joseph-Nathan P AD - Univ Nacl Colombia, Dept Quim, Santa Fe De Bogota, DC, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRivera, A, Univ Nacl Colombia, Dept Quim, AA 14490,Ciudad Univ, Santa Fe De Bogota, DC, Colombia TI - An efficient approach to 1,3,5-trisarylhexahydro-1,3,5-triazines AB - In this paper we report a facile and efficient procedure for the synthesis of 1,3,5-tris-arylhexahydro-1,3,5-triazines (3) by reaction of anilines 1 with 1,3,6,8-tetrazatricyclo[4.4.1.1(3.8)]- dodecane (TATD) (2). The diequatorial chair conformational preference of 3b (Ar = p-tolyl) in the solid state was established by X-ray crystallography and agrees well with molecular mechanics calculations MH - Colombia MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0039-7911 UR - ISI:000175809600015 SO - Synthetic Communications 2002 ;32(9):1407-1414 6603 UI - 9564 AU - Rivera JA AU - Habicht JP AD - Inst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca 62508, Morelos, MexicoCornell Univ, Div Nutr Sci, Ithaca, NY 14853, USARivera, JA, Inst Nacl Salud Publ, Ctr Invest Nutr & Salud, Ave Univ 655,Colonia Santa Maria, Cuernavaca 62508, Morelos, Mexico TI - Effect of supplementary feeding on the prevention of mild-to-moderate wasting in conditions of endemic malnutrition in Guatemala AB - Objective To estimate the effect of supplementary feeding on the prevention of wasting in preschool children in a rural area of Guatemala with a high prevalence of malnutrition. Methods Children aged 6-48 months, with a weight-for-length exceeding 40% of that of the median NCHS/WHO/CDC reference population, received either Atole, a drink with a high protein and moderate energy content, or Fresco, a drink with no protein and a low energy content. Children consuming amounts of Atole equivalent to more than 10% of the age-adjusted recommended dietary intake for energy were termed "supplemented". A comparable group of children consuming Fresco was termed "non-supplemented". The energy intake in the supplemented group was higher than that in the non-supplemented group by 16-18% of the recommended daily intake. The corresponding difference in protein intake was 45-80% of the recommended daily intake. The children were followed up at intervals of three or six months in order to evaluate their weight-for-length development. The difference between supplemented and non-supplemented children in the proportions maintaining their weight-for-length category at the end of the study intervals represented the prevention of wasting attributable to supplementary feeding (attributable prevention). Households were used as,units of analysis in order to avoid cluster effects. Findings The attributable prevention in children aged 6-24 months with weight-for-length between 90% and 99.9% of the reference population at entry ranged from 0.21 to 0.26 and was statistically significant after three and six months of supplementation However, it was not significant in children at or above 100% weight-for-length or in older children. Children above 100% weight-for-length did not become overweight as a result of supplementation. Conclusion Supplementary feeding of children aged 6-24 months in populations with inadequate dietary intakes cart prevent the onset of wasting in a large proportion of children MH - Mexico|Morelos MH - USA PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 9 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000179997300004 L2 - deficiency diseases/therapy/prevention and control;cachexia/prevention and control;endemic diseases;dietary supplements/utilization;energy intake;bias (epidemiology);child;preschool;controlled clinical trials;Guatemala;RECOVERY; CHILDREN SO - Bulletin of the World Health Organization 2002 ;80(12):926-932 6604 UI - 10511 AU - Rivera JL AU - Alejandre J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoRivera, JL, Univ Tennessee, Dept Chem Engn, Knoxville, TN 37996, USA TI - Vapor-liquid equilibrium simulations of nitrogen and n-alkane binary mixtures AB - Molecular dynamics simulations have been carried out to study nitrogen-n-alkane binary mixtures in the liquid-vapor phase equilibrium. The coexisting densities, composition, vapor pressure, and surface tension of mixtures are calculated in a wide range of pressures at constant temperature. The n-alkane molecules varied from n-pentane to n-decane. The coexistence diagrams were obtained using a recently developed potential model for n-alkane molecules, NERD. Results from this work show that these potential models reproduce available experimental data at low and moderate pressures for the composition-pressure diagram. The models over-predicted the vapor pressure compared with experimental data. At the same temperature and pressure, the surface tension increases with n-alkane chain length. At 310.93 K and 200 bars, the surface tension increased about 90% by changing n-hexane for n-decane in the binary mixture. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000177356400024 L2 - molecular simulation;VLE;surface tension;nitrogen;alkanes;MOLECULAR-DYNAMICS SIMULATION; TRANSPORT-PROPERTIES; SURFACE-TENSION; WATER SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2002 ;207(1-3):223-228 6605 UI - 9003 AU - Rivera M AU - Gee J AD - Univ Penn, Dept Radiol, Philadelphia, PA 19104, USACtr Invest Matemat AC, Guanajuato 36020, MexicoRivera, M, Univ Penn, Dept Radiol, 3600 Market St,suite 370, Philadelphia, PA 19104 USA TI - Image segmentation by flexible models based on robust regularized networks AB - The object of this paper is to present a formulation for the segmentation and restoration problem using flexible models with a robust regularized network (RRN). A two-steps iterative algorithm is presented. In the first step an approximation of the classification is computed by using a local minimization algorithm, and in the second step the parameters of the RRN are updated. The use of robust potentials is motivated by (a) classification errors that can result from the use of local minimizer algorithms in the implementation, and (b) the need to adapt the RN using local image gradient information to improve fidelity of the model to the data MH - Mexico|Guanajuato MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000181393900041 L2 - segmentation;restoration;edge-preserving regularization;RESTORATION; RECOVERY; RELAXATION; VISION SO - Computer Vision - Eccv 2002 Pt Iii 2002 ;2352():621-634 6606 UI - 11704 AU - Rivera M AU - Parmananda P AU - Eiswirth M AD - UAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoMax Planck Gesell, Fritz Haber Inst, D-14195 Berlin, GermanyRivera, M, UAEM, Fac Ciencias, Ave Univ 1001,Col Chamilpa, Cuernavaca, Morelos, Mexico TI - Birhythmicity induced by perturbing an oscillating electrochemical system AB - We describe the generation of new limit cycles in electrochemical systems under the influence of external periodic perturbations. For certain specific parameters of a nonharmonic forcing function, two coexisting periodic orbits can be generated from a single limit cycle observed in the unperturbed dynamics. This inception of birhythmicity (bistability) is observed in both simulations and actual experiments involving potentiostatic electrodissolution of copper in an acetate buffer MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000174038300002 L2 - BIFURCATIONS; COPPER SO - Physical Review e 2002 ;65(2): 6607 UI - 10833 AU - Rivetti A AU - Anelli G AU - Martinez MI AU - Mazza G AU - Rotondo F AU - Tosello F AU - Wheadon R AD - Univ Turin, I-10125 Turin, ItalyIst Nazl Fis Nucl, I-10125 Turin, ItalyCERN, Div EP, CH-1211 Geneva, SwitzerlandCINVESTAV, Mexico City 14000, DF, MexicoIst Nazl Fis Nucl, Sezione Torino, I-10125 Turin, ItalyRivetti, A, Univ Turin, Via Pietro Giuria 1, I-10125 Turin, Italy TI - Test results of the front-end system prototype for the silicon drift detectors of ALICE AB - The front-end system of the Silicon Drift Detectors (SDDs) of the ALICE experiment is made of two ASICs. The first chip performs the preamplification, temporary analogue storage and analogue-to-digital conversion of the detector signals. The second chip is a digital buffer that allows for a significant reduction of the connections from the front-end module to the outside world. In this paper. the architecture of the system is described and the results achieved on a first prototype are presented. (C) 2002 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000176461000031 L2 - silicon drift detection;front-end electronics;mixed-mode integrated circuits;radiation tolerance SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;485(1-2):188-192 6608 UI - 8534 AU - rmendariz-Borunda J AU - Garcia L AU - Hernandez I AU - Garcia J AU - Sandoval AS AU - Salazar A AU - Grijalva G AD - Univ Guadalajara, Guadalajara 44430, Jalisco, MexicoMarnac Inc, Dallas, TX, USA TI - Liver cirrhosis can efficiently be reversed with pirfenidone MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000178301701282 SO - Hepatology 2002 ;36(4):488A-488A 6609 UI - 11073 AU - rmendariz-Borunda J AU - Miranda A AU - Salgado S AU - Bueno M AU - Vera J AU - guilar-Cordova E AD - Univ Guadalajara, CUCS, Inst Biol Mol & Terapia Gen, Guadalajara 44430, Jalisco, MexicoHarvard Gene Therapy Initiat, Boston, MA, USA TI - Human UPA gene therapy as a co-adyuvant element of bilio-digestive anastomosis in the treatment of secondary biliary cirrhosis MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0168-8278 UR - ISI:000175704700644 SO - Journal of Hepatology 2002 ;36():183-183 6610 UI - 10105 AU - Roa AR AU - Skog LE AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Herbario Nacl Mexico, Mexico City 04510, DF, MexicoSmithsonian Inst, US Natl Herbarium, Washington, DC 20013, USARoa, AR, Univ Nacl Autonoma Mexico, Fac Ciencias, Herbario Nacl Mexico, Mexico City 04510, DF, Mexico TI - Novae Gesneriaceae Neotropicarum X: A new species of Achimenes from Mexico AB - A new species of Achimenes Persoon, A. hintoniana, is described from western Mexico and distinguished from the closely related A. mexicana by the pilose indumentum of the stem, leaves, and pedicels, the linear-lanceolate calyx lobes, and the slightly saccate purple or rarely white corolla MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000178421700014 L2 - Achimenes;Gesnerjaceae;Mexico SO - Novon 2002 ;12(3):382-384 6611 UI - 9749 AU - Robinson M AU - Kochekseraii SB AD - ITESM, Dept Engn Mech, Mexico City 52926, DF, MexicoUMIST, Dept Engn Mech, Manchester M60 IQD, Lancs, EnglandKochekseraii, SB, ITESM, Dept Engn Mech, Campus Estado Mexico, Mexico City 52926, DF, Mexico TI - Parametric survey of upper and lower bound limit in-plane bending moments for single mitred pipe bends of various geometries AB - The problem of limit analysis for a cylinder-cylinder intersection forming a single mitred pipe bend subject to in-plane bending has been investigated. Lower bound analysis with new equations of force and moment equilibrium together with a higher number of parameters resulted in more stability as compared to a previous analysis of the same problem [PhD Thesis, The University of Manchester, 1991]. Concurrently, ABAQUS finite element plastic collapse moments were obtained as upper bounds to the problem. Two sets of results were compared, showing good agreement with each other. It could be finally concluded that the true limit moments are bounded in between. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Multidisciplinary;Engineering, Mechanical U5 - J;Article AV - English IS - 0308-0161 UR - ISI:000179490000002 L2 - shell limit analysis;lower bound limit moments;finite element;ABAQUS SO - International Journal of Pressure Vessels and Piping 2002 ;79(11):735-740 6612 UI - 10196 AU - Robinson M AU - Gordon G AU - Murthy A AU - Mao L AU - Jokubaitis L AD - Oklahoma Fdn Digest Res, Oklahoma City, OK, USACtr Digest & Liver Dis, Mexico City, DF, MexicoJanssen Pharmaceut Inc, Titusville, NJ, USAEisai & Co Ltd, Teaneck, NJ, USA TI - Rabeprazole efficacy in relief of regurgitation symptoms alone and in combination with heartburn in patients with erosive GERD MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0002-9270 UR - ISI:000178230400048 SO - American Journal of Gastroenterology 2002 ;97(9):S16-S16 6613 UI - 11061 AU - Robledo A AU - Barbosa MC AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUFRGS, Inst Fis, BR-91501970 Porto Alegre, RS, BrazilRobledo, A, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Invited Papers from the 21st IUPAP International Conference on Statistical Physics held in Cancun, Mexico, 15-21 July 2001 - Foreword MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0378-4371 UR - ISI:000175781700001 SO - Physica A-Statistical Mechanics and Its Applications 2002 ;306(1-4):XVII-XVIII 6614 UI - 11801 AU - Robles M AU - Perondi L AU - Kaski K AD - Helsinki Univ Technol, Lab Computat Engn, FIN-02015 Helsinki, FinlandInst Nacl Pesquisas Espaciais, BR-12227010 Sao Jose Dos Campos, SP, BrazilRobles, M, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Priv Xochicalco S-N Col,Ctr Temxico Mor Ap 34, Mexico City 62580, DF, Mexico TI - Dynamics of a dislocation set in motion by an external stress AB - The relation between dislocation velocity and resolved shear stress is studied computationally at the atomic scale using Molecular Dynamics simulations in a two-dimensional Lennard-Jones system. Mimicking a well known experimental technique, we apply a calibrated stress pulse to a system with a single dislocation and follow with a run-time graphics tool and displacement-field based tracking method, the dislocation motion caused by momentum transfer from an externally generated stress pulse. The empirically suggested power law relation between dislocation velocity and resolved shear stress seems to hold also in the atomic scale MH - Brazil MH - Finland MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Physics, Mathematical U5 - J;Article AV - English IS - 0129-1831 UR - ISI:000173899700010 L2 - molecular dynamics;dislocation;Lennard-Jones potential;PLASTICITY; CRYSTALS SO - International Journal of Modern Physics C 2002 ;13(1):97-105 6615 UI - 10625 AU - Robles R AU - Alvarez F AU - Alcaraz G AD - Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoUniv Louisiana, Dept Biol, Lafayette, LA 70504, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Lab Ecofisiol, Mexico City 04510, DF, MexicoAlvarez, F, Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Oxygen consumption of the crab Callinectes rathbunae parasitized by the rhizocephalan barnacle Loxothylacus texanus as a function of salinity AB - Rhizocephalan parasitism is one of the most important biotic factors affecting commercially valuable crab species in families such as Portunidae and Lithodidae. In addition to the long term and permanent effects of this parasitism on the hosts (e.g. sterilization, cessation of growth), other functional problems may arise due to the considerable size of the parasite and to its particular position inside and outside of the host. In this study, experiments with the Mexican blue crab Callinectes rathbunae parasitized by the rhizocephalan barnacle Loxothylacus texanus were conducted in the laboratory to test whether the parasite affects the host's oxygen consumption rate under changing salinity conditions, A total of 83 crabs (49 parasitized and 34 controls), all initially acclimated to a salinity of 5, were used for metabolic rate measurements over sequential 24 h periods at salinities of 5, 15 and 25, During this 3 d period, oxygen consumption of individual crabs was measured 5 times per day. Parasitized crabs were classified, according to the degree of maturation of the parasite, as: (1) crabs with internal parasites, bearing a modified abdomen; (2) crabs with virgin, immature, recently emerged parasites; and (3) crabs with mature, fully developed parasites. Crabs with internal and virgin parasites did not show differences in oxygen consumption rates with respect to control crabs, Crabs with mature parasites consumed from 57 to 139% more than other crabs under all salinity conditions, Although there is a significant metabolic cost for the host associated to the presence of mature L texanus, it is not clear what specific process is responsible for the observed results. Since the increased oxygen consumption was unrelated to salinity, it is concluded that the host's osmoregulatory capabilities are not affected; other possible explanations include the constant grooming and maintenance of the parasite, At the population level, our results suggest that hosts bearing mature parasites may move within the estuaries from low to high salinity areas in order to reduce the metabolic energy expenditure caused by the combination of the parasite and hypoosmotic conditions MH - Mexico|Distrito Federal MH - USA PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000176988400018 L2 - oxygen consumption;Callinectes rathbunae;Loxothylacus texanus;CIRRIPEDIA; REPRODUCTION SO - Marine Ecology-Progress Series 2002 ;235():189-194 6616 UI - 10015 AU - Rocha-Ramirez V AU - Omero C AU - Chet I AU - Horwitz BA AU - Herrera-Estrella A AD - Ctr Invest & Estudios Avanzados, Unidad Irapuato, Dept Plant Genet Engn, Guanajuato 36500, MexicoHebrew Univ Jerusalem, Otto Warburg Ctr Agr Biotechnol, Fac Agr, IL-76100 Rehovot, IsraelTechnion Israel Inst Technol, Dept Biol, IL-32000 Haifa, IsraelHerrera-Estrella, A, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Dept Plant Genet Engn, AP 629,Irapuato, Guanajuato 36500, Mexico TI - Trichoderma atroviride G-protein alpha-subunit gene tga1 is involved in mycoparasitic coiling and conidiation AB - The soil fungus Trichoderma atroviride, a mycoparasite, responds to a number of external stimuli. In the presence of a fungal host, T. atroviride produces hydrolytic enzymes and coils around the host hyphae. In response to light or nutrient depletion, asexual sporulation is induced. In a biomimetic assay, different lectins induce coiling around nylon fibers; coiling in the absence of lectins can be induced by applying cyclic AMP (CAMP) or the heterotrimeric G-protein activator mastoparan. We isolated a T. atroviride G-protein a-subunit (Galpha) gene (tga1) belonging to the fungal subfamily with the highest similarity to the Got, class. Generated transgenic lines that overexpress Galpha show very delayed sporulation and coil at a higher frequency. Furthermore, transgenic lines that express an activated mutant protein with no GTPase activity do not sporulate and coil at a higher frequency. Lines that express an antisense version of the gene are hypersporulating and coil at a much lower frequency in the biomimetic assay. The loss of Tga1 in these mutants correlates with the loss of GTPase activity stimulated by the peptide toxin Mas-7. The application of Mas-7 to growing mycelial colonies raises intracellular cAMP levels, suggesting that Tga1 can activate adenylyl cyclase. In contrast, cAMP levels and cAMP-dependent protein kinase activity drop when diffusible host signals are encountered and the mycoparasitism-related genes ech42 and prb1 are highly expressed. Mycoparasitic signaling is unlikely to be a linear pathway from host signals to increased cAMP levels. Our results demonstrate that the product of the tga1 gene is involved in both coiling and conidiation MH - Israel MH - Mexico|Guanajuato PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 27 U4 - Microbiology U5 - J;Article AV - English IS - 1535-9778 UR - ISI:000178729400010 L2 - SACCHAROMYCES-CEREVISIAE; NEUROSPORA-CRASSA; ASPERGILLUS-NIDULANS; SCLEROTIUM-ROLFSII; CYCLIC-AMP; TRANSCRIPTION FACTOR; SIGNALING PATHWAYS; USTILAGO-MAYDIS; ENCODING GENE; BETA-SUBUNIT SO - Eukaryotic Cell 2002 ;1(4):594-605 6617 UI - 9518 AU - Rodil SE AU - Ferrari AC AU - Robertson J AU - Muhl S AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandRodil, SE, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Infrared spectra of carbon nitride films AB - The assignment of the vibrational modes in amorphous carbon nitride (CN) films is discussed by considering CN films deposited using a variety of methods. The infrared (IR) spectra of CN show three main absorption bands. In hydrogenated CN samples, CHx and NHx groups give rise to stretching vibrations at 3000 and 3400 cm(-1), respectively. A weaker sharp band is observed approximately 2200 cm(-1) due to CN-sp(1) bonds. Finally, there is a broad band between 1000 and 2000 cm(-1). It is usually stated that the effect of nitrogen into carbon films is to break the symmetry of the sp(2) carbon bonds making the Raman 'G' (graphitic) and 'D' (disorder) modes IR active, so the broad band between 1000 and 2000 cm(-1) is similar in both IR and Raman spectra. However, it is shown that nitrogen is not necessary to have significant IR activity in the 1000-2000 cm(-1) region. Also, Raman spectroscopy in carbon is always a resonant process, so that the spectra depend on the excitation energy. Therefore, the similarity of the visible Raman and IR spectra of some CNs is generally a coincidence. We show that the IR broad band in the 1000-2000 cm(-1) region is an electronic effect and is not due to activation of IR forbidden modes due to symmetry breaking. This explains the IR spectra not only of CN films but also of N-free amorphous carbon films and is related to the presence of the system of delocalized pi bonds with increasing conjugation. (C) 2002 Elsevier Science B.V All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 31 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000179922500021 L2 - infrared spectroscopy;carbon;nitrides;Raman scattering;optical properties;electron energy loss spectroscopy (EELS);HYDROGENATED AMORPHOUS-CARBON; X-RAY-ABSORPTION; THIN-FILMS; OPTICAL-PROPERTIES; DIAMOND-LIKE; CNX FILMS; NITROGEN INCORPORATION; RAMAN-SPECTROSCOPY; CHARGE FLUXES; C-H SO - Thin Solid Films 2002 ;420():122-131 6618 UI - 11396 AU - Rodriguez-Canul R AU - rgaez-Rodriguez F AU - de la Gala DP AU - Villegas-Perez S AU - Fraser A AU - Craig PS AU - Cob-Galera L AU - Dominguez-Alpizar JL AD - Inst Politecn Nacl, CINVESTAV, Lab Inmunol & Biol Mol, Merida 97310, Yucatan, MexicoUniv Autonoma Yucatan, Fac Med Vet & Zootecn, Lab Parasitol & Inmunol & Salud Publ Vet, Merida 97100, Yucatan, MexicoUniv Salford, Sch Environm & Life Sci, Div Biol Sci, Cestode Zoonoses Res Grp, Salford M5 4WT, Lancs, EnglandRodriguez-Canul, R, Inst Politecn Nacl, CINVESTAV, Lab Inmunol & Biol Mol, Carretera Antigua Progreso Km 6,AP 73, Merida 97310, Yucatan, Mexico TI - Taenia solium metacestode viability in infected pork after preparation with salt pickling or cooking methods common in Yucatan, Mexico AB - The cestode parasite Taenia solium is an important cause of foodborne infection throughout tropical and subtropical regions. Ingestion of pork meat infected with T. solium larvae can lead to taeniasis infection in humans. With tourism and the consumption of native food increasing, it is important to investigate potential risks of transmission associated with food preparation methods. In this study, traditional Mexican salt pickling and two methods of pork preparation (as roast pork [cochinita pibil and in pork and beans [frijol con puerco]) were evaluated in order to determine their effects on T. solium cyst viability in infected tissue. In the control groups, all metacestodes isolated were 100% viable, and only small changes in pH (from 6.0 to 5.9) and temperature (29 to 30degreesC) were recorded. No viable cysts were detected after 12 and 24 h of salt pickling. The pH of the meat during salting dropped from 6.0 to 5.3. Osmotic changes and dehydration from the salting, rather than a change in pH, could be considered the main cause of cyst death. Temperatures of >65degreesC damaged T. solium metacestodes in roast pork and in pork and beans. The results of this study indicate that if traditional pork dishes are prepared properly, T. solium cysts are destroyed. The criteria used in this study to evaluate the viability, of tissue cysts are discussed MH - United Kingdom MH - Mexico|Yucatan PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000175000200013 L2 - CYSTICERCOSIS SO - Journal of Food Protection 2002 ;65(4):666-669 6619 UI - 11508 AU - Rodriguez-Castro R AU - Kelestemur MH AD - Firat Univ, Sch Engn, Dept Met & Mat Sci, Elazig, TurkeyInst Tecnol Celaya, Dept Ingn Mecan, Celaya 38010, Gto, MexicoKelestemur, MH, Firat Univ, Sch Engn, Dept Met & Mat Sci, Elazig, Turkey TI - Processing and microstructural characterization of functionally gradient Al A359/SiCp composite AB - A centrifugal casting method is presented in this paper for processing Al/SiCp Functionally Gradient Material (FGM), along with the corresponding microstructural characterization. Results are presented and discussed on SiC particles distribution, particles-solidification front interactions, matrix micro-structure, and porosity distribution in the castings as a function of the centrifugal forces applied. Three different casting rotational speeds (700, 1000 and 1300 rpm) were utilized while keeping all other casting conditions constant. For the highest speed applied, a variation of graded composition in the range of 20 to 44 vol% of SiC was obtained. Moreover, such progressive concentration of particles was observed to be very homogeneous due to engulfment of particles (promoted by the high relative velocity between the solidification front and particles) and also as a consequence of elevated cooling rates developed in this case. Additional results showed that the matrix micro-structure is modified according to the SiC reinforcement content and cooling rates, which both depend on the centrifugal forces applied. (C) 2002 Kluwer Academic Publishers MH - Mexico|Guanajuato MH - Turkey PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000174752800011 L2 - GRADED MATERIAL; SOLIDIFICATION; BEHAVIOR SO - Journal of Materials Science 2002 ;37(9):1813-1821 6620 UI - 11884 AU - Rodriguez-Castro R AU - Wetherhold RC AU - Kelestemur MH AD - Inst Tecnol Celaya, Dept Ingn Mecan, Celaya 38010, Gto, MexicoSUNY Buffalo, Dept Mech & Aerosp Engn, Buffalo, NY 14260, USAFirat Univ, Sch Engn, Met & Mat Sci Dept, TR-23119 Elazig, TurkeyRodriguez-Castro, R, Inst Tecnol Celaya, Dept Ingn Mecan, Av Tecnol & Garcia Cubas, Celaya 38010, Gto, Mexico TI - Microstructure and mechanical behavior of functionally graded Al A359/SiCp composite AB - The microstructure and mechanical behavior including tensile and fracture properties of a. functionally gradient Al A359/SiCp composite processed by centrifugal casting have been investigated. The particle volume fraction and, therefore, elasticity modulus was gradually changed in the continuous form along a certain direction by using the centrifugal casting. The effect of SiC particulate reinforcement on strengthening of A359 Al alloy was experimentally studied by tensile testing specimens with different SiC contents. There was a continuous increase in tensile and yield strength with increasing SiC volume, fractions in the range of 0.20-0.30. On the contrary, there was a reduction in tensile and yield strength for SiC concentrations in the range of 0.30-0.40. The fracture experiments were performed according to the ASTM E399 standards. Single edge cracked plate tension (SECT) and single edge cracked four point bending (4PB) specimens, which are taken, from rectangular Al/SiCp blocks, were used for fracture tests. The fracture toughness, K-1C, and fractographic characteristics of the material were determined by using MTS 810 servohydraulic machine and Hitachi S-800 scanning electron microscopy (SEM), respectively. At elevated SiC concentrations (low values of crack length), limited dissipation of energy by restrained plastic deformation of the matrix at the crack tip produced low fracture toughness values. On the contrary, at longer crack. lengths SiC content decreased and there was more absorption of energy, resulting in higher fracture toughness values. A ductile failure process of void coalescence type fracture in the matrix of the composite was observed but the void size was less when the SiC concentration was higher. In addition, SEM fractographs also displayed that fracture and de-cohesion of SiC occurred with particle fracture dominating over de-cohesion and with fracture incidence increasing as particle concentration increases. (C) 2002 Elsevier Science BN. All rights reserved MH - Mexico|Guanajuato MH - Turkey MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000173579800057 L2 - Al/SiCp composites;functionally graded material;microstructure;fracture mechanics behavior;METAL-CERAMIC COMPOSITES; GRADIENT MATERIALS; MATRIX COMPOSITES; THERMAL-STRESSES; FRACTURE-MECHANICS; RESIDUAL-STRESSES; SIC COMPOSITES; CRACK PROBLEM; DEFORMATION; REINFORCEMENT SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2002 ;323(1-2):445-456 6621 UI - 11495 AU - Rodriguez-Contreras D AU - de la Torre P AU - Velasco J AU - Shoemaker CB AU - Laclette JP AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoAgRes, Wallaceville Anim Res Ctr, Upper Hutt, New ZealandLaclette, JP, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, AP 70228, Mexico City 04510, DF, Mexico TI - The Taenia solium glucose transporters TGTP1 and TGTP2 are not immunologically recognized by cysticercotic humans and swine AB - Cysticercosis caused by the metacestode of the tapeworm Taenia solium causes economic losses in pork meat production, as well as being a human health hazard in some parts of the world. In order to determine if the glucose transporters GTP1 and TGTP2 are recognized by antibodies in the sera from cysticercotic humans and pigs, western blot assays were carried out using membrane fractions of insect cells expressing the two T. solium glucose transporters. Results demonstrated a complete lack of recognition of both TGTPs. These results are unexpected, because at least one transporter is present on the apical surface of the cysticercus tegument MH - Mexico|Distrito Federal MH - New Zealand PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000174665000016 L2 - PROTEIN SO - Parasitology Research 2002 ;88(3):280-282 6622 UI - 10499 AU - Rodriguez-Dagnino RM AU - Ruiz-Cedillo JJ AU - Takagi H AD - Monterrey Inst Technol, Ctr Elect & Telecomunicac, Monterrey 64849, NL, MexicoUniv Tsukuba, Inst Policy & Planning Sci, Tsukuba, Ibaraki 3058573, JapanRodriguez-Dagnino, RM, Monterrey Inst Technol, Ctr Elect & Telecomunicac, Sucursal de Correos J, Monterrey 64849, NL, Mexico TI - Dynamic mobility management for cellular networks: A delayed renewal process approach AB - Tracking mobile users in cellular wireless networks involves two basic functions: location update and paging. Location update refers to the process of tracking the location of mobile users that are not in conversation. Three basic algorithms have been proposed in the literature, namely the distance-based, time-based, and movement-based algorithms. The problem of minimizing the location update and paging costs has been solved in the literature by considering exponentially distributed Cell Residence Times (CRT) and Inter-Call Time (ICT), which is the time interval between two consecutive phone calls. In this paper we select the movement-based scheme since it is effective and easy to implement. Applying the theory of the delayed renewal process, we find the distribution of the number of cell crossings when the ICT is a mixture of exponentially distributed random variables and the CRT comes from any distribution with Laplace transform. In particular, we consider the case in which the first CRT may have a different distribution from the remaining CRT's, which includes the case of circular cells. We aim at the total cost minimization in this case MH - Japan MH - Mexico|Nuevo Leon PB - TOKYO: IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0916-8516 UR - ISI:000177322800001 L2 - cellular networks;location registration;delayed renewal process;optimal updating threshold;PERFORMANCE ANALYSIS; PCS NETWORKS; SYSTEMS SO - Ieice Transactions on Communications 2002 ;E85B(6):1069-1074 6623 UI - 10256 AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AU - Johnson RJ AD - FUNDACITE Zulia, Renal Serv & Lab, Univ Hosp, Maracaibo, VenezuelaFUNDACITE Zulia, Inst Invest Biomed, Maracaibo, VenezuelaInst Nacl Cardiol, Dept Nephrol, Mexico City, DF, MexicoBaylor Coll Med, Div Nephrol, Houston, TX 77030, USARodriguez-Iturbe, B, Apartado Postal 1430, Maracaibo 4001 A, Venezuela TI - Interstitial inflammation, sodium retention, and the pathogenesis of nephrotic edema: A unifying hypothesis AB - Background. The pathophysiology of edema in the nephrotic syndrome is controversial. Some investigators believe that sodium retention may result from a primary renal defect that causes an "overfilled" blood volume. In contrast, other authors believe that fluid escapes the vascular compartment due a low oncotic pressure, and sodium retention is a compensatory physiological response to an "underfilled" blood volume. The patients that best fit the "underfilled" hypothesis are children with minimal-change nephrotic syndrome (MCNS). Methods. We analyzed critically the available evidence for and against each proposed pathogenic mechanism in the light of recent evidence indicating that the inflammatory infiltrate may play a role in primary renal sodium retention. Results. Inflammatory infiltrate in the kidney is a constant characteristic in nephrotic syndrome associated with primary sodium retention and it is absent in most cases of MCNS in children Conclusions. We propose that primary sodium retention in the nephrotic syndrome depends on the existence and the intensity of renal inflammatory infiltrate, conspicuously absent in most cases of MCNS in children and present in other conditions associated with massive proteinuria. The tubulointerstitial inflammatory infiltrate is associated with increased vasoconstrictive mediators that result in increased tubular sodium reabsorption and with glomerular hemodynamic changes that reduce filtered sodium load MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 13 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000178042000029 L2 - nephrotic syndrome;hypoalbuminemia;glomerulonephritis;renin-angiotensin;interstitial cells;SALT-SENSITIVE HYPERTENSION; ATRIAL NATRIURETIC PEPTIDE; ANGIOTENSIN-II EXPOSURE; NF-KAPPA-B; RENAL-FUNCTION; BLOOD-VOLUME; ALDOSTERONE SYSTEM; ONCOTIC PRESSURE; OXIDATIVE STRESS; PLASMA-PROTEIN SO - Kidney International 2002 ;62(4):1379-1384 6624 UI - 10264 AU - Rodriguez-Iturbe B AU - Quiroz Y AU - Herrera-Acosta J AU - Johnson RJ AU - Pons HA AD - Univ Hosp, Renal Serv & Lab, Maracaibo, VenezuelaFundacite Zulia, Inst Invest Biomed, INBIOMED, Maracaibo, VenezuelaInst Nacl Cardiol Ignacio Chavez, Div Renal, Mexico City, DF, MexicoBaylor Coll Med, Div Renal, Houston, TX 77030, USARodriguez-Iturbe, B, POB 1430, Maracaibo 4001A, Venezuela TI - The role of immune cells infiltrating the kidney in the pathogenesis of salt-sensitive hypertension AB - This work summarizes recent evidence that suggests that renal infiltration with immune cells plays a role in the pathogenesis of salt-sensitive hypertension. The presence of immunocompetent cells is a conspicuous finding in conditions associated with hypertension induced or maintained by a high salt intake. Studies in models of salt-sensitive hypertension following angiotensin H infusion and nitric oxide synthesis inhibition indicate that a reduction in the tubulointerstitial infiltration of lymphocytes and macrophages during the induction period results in protection from the subsequent development of salt-sensitive hypertension. Reduction of the renal immune infiltrate in spontaneously hypertensive rats results in near normalization of the blood pressure. The reduction in the immune infiltrate is associated with a reduction in the number of cells expressing angiotensin 11 (some of which are immune cells) and a reduction in renal oxidative stress. Since increased intrarenal angiotensin activity tends to reduce filtered sodium and increase sodium reabsorption, and the tubulointerstitial damage resulting from oxidative stress can induce a shift to the right in the pressure-natriuresis relationship, these findings suggest potential mechanisms by which the immune infiltrate could induce or worsen salt-driven hypertension. (C) 2002 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 17 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000177951700002 L2 - immune system;hypertension;angiotensin II;superoxide;positive cells;MYCOPHENOLATE-MOFETIL PREVENTS; NITRIC-OXIDE SYNTHESIS; ANGIOTENSIN-II; BLOOD-PRESSURE; RENAL INJURY; MEDIATED HYPERTENSION; MONONUCLEAR-CELLS; KAPPA-B; RATS; EXPRESSION SO - Journal of Hypertension 2002 ;20():S9-S14 6625 UI - 11821 AU - Rodriguez-Iturbe B AU - Quiroz Y AU - Nava M AU - Bonet L AU - Chavez M AU - Herrera-Acosta J AU - Johnson RJ AU - Pons HA AD - Univ Zulia, Inst Invest Biomed, Univ Hosp, Renal Serv & Lab, Zulia 4001A, VenezuelaInst Cardiol, Dept Nephrol, Mexico City 14080, Tlalpan, MexicoBaylor Coll Med, Div Renal, Houston, TX 77030, USARodriguez-Iturbe, B, Apartado Postal 1430, Zulia 4001A, Venezuela TI - Reduction of renal immune cell infiltration results in blood pressure control in genetically hypertensive rats AB - Immunocompetent cells infiltrate the kidney in several models of experimental hypertension. We have previously shown that reduction of this infiltrate results in prevention of salt-sensitive hypertension induced by short-term angiotensin II infusion and nitric oxide inhibition (Quiroz Y, Pons H, Gordon KI, Rincon J, Chavez M, Parra G, Herrera-Acosta J, Gomez-Garre D, Largo R, Egido J, Johnson RJ, and Rodriguez-Iturbe B. Am J Physiol Renal Physiol 281: F38-F47, 2001; Rodriguez-Iturbe B, Pons H, Quiroz Y, Gordon K, Rincon J, Chavez M, Parra G, Herrera-Acosta J, Gomez-Garre D, Largo R, Egido J, and Johnson RJ. Kidney Int 59: 2222-2232, 2001). We therefore studied whether hypertension could be controlled in genetically hypertensive rats [spontaneously hypertensive rats (SHR)] by the administration of 20 mg.kg(-1).day(-1) of the immunosuppressive drug mycophenolate mofetil (MMF group; n = 35). Other SHR received vehicle (n = 35), and Wistar-Kyoto rats (n = 20) were used as controls. MMF or vehicle was given in two separate 4-wk periods, separated by a 3-wk interval. Systemic hypertension was reduced to normal levels in both periods of MMF treatment in association with a reduction in lymphocyte, macrophage, and angiotensin II-positive cells infiltrating the kidney. Oxidative stress was also reduced by MMF, as indicated by a reduction in urinary malondialdehyde (MDA), renal MDA content, and superoxide-positive cells, and was highly correlated with blood pressure levels. We conclude that the renal immune infiltrate plays a major role in the hypertension in SHR MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 60 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000173348100002 L2 - immune cells;spontaneously hypertensive rats;mycophenolate mofetil;oxidative stress;MYCOPHENOLATE-MOFETIL PREVENTS; ANGIOTENSIN-II; IN-VIVO; SUPEROXIDE PRODUCTION; ADHESION MOLECULES; OXIDATIVE STRESS; UP-REGULATION; TNF-ALPHA; SYSTEM; EXPRESSION SO - American Journal of Physiology-Renal Physiology 2002 ;282(2):F191-F201 6626 UI - 10457 AU - Rodriguez-Manzo G AU - Lopez-Rubalcava C AU - Hen R AU - Fernandez-Guasti A AD - CINVESTAV, Dept Farmacobiol, IPN, Sede Sur, Mexico City 14330, DF, MexicoColumbia Univ, Ctr Neurobiol & Behav, New York, NY 10032, USARodriguez-Manzo, G, CINVESTAV, Dept Farmacobiol, IPN, Sede Sur, Calzada Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Participation of 5-HT1B receptors in the inhibitory actions of serotonin on masculine sexual behaviour of mice: pharmacological analysis in 5-HT1B receptor knockout mice AB - 1 The role of the 5-Hydroxytryptamine(1B) (5-HT1B) receptor subtype in masculine sexual behaviour in mice was analysed in both 5-HT1B receptor knockout (KO1B) and wild-type (WT) animals. 2 Comparison of male copulatory behaviour of WT and KOIB strains revealed that KOIB mice become interested earlier in sexual behaviour, but require more stimulation to achieve ejaculation than its corresponding WT strain. 3 The pharmacological manipulation of male sexual activity in the WT strain showed that the serotonin precursor 5-Hydroxytryptophan (5-HTP), the 5-HT1B agonist (1-(m-trifluoromethylphenyl) piperazine (TFMPP) and the 5-Hydroxytryptaminc(1A) (5-HT1A) receptor agonist 8-hydroxy-2-di-n-propylamino-tetralin (8-OH-DPAT) all inhibited male copulatory behaviour in mice. 4 In KO1B mice, TFMPP lacked an effect, 5-HTP exerted a mild inhibitory effect while 8-OHDPAT provoked only a tendency towards a reduction in the percentage of animals that achieved ejaculation. In general, KO1B mice were less sensitive to the inhibitory actions of 5-HTP and 8-OH-DPAT than the WT strain. 5 Based on these results, we can suggest that serotonin plays a general inhibitory role in the sexual behaviour of male mice and that both 5-HT1B and 5-HT1A receptor subtypes participate in the inhibitory actions of this neurotransmitter. 6 The absence of the 5-HT1B receptor subtype affected both components of mouse masculine sexual behaviour, motivation and execution, further confirming the involvement of this receptor subtype in the control of this behaviour. In addition, the diminished sensitivity to serotonergic stimulation exhibited by KOIB mice suggests the occurrence of compensatory changes as a consequence of the absence of the 5-HT1B receptor subtype MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000177471600009 L2 - masculine sexual behaviour in mice;5-HT1B knockout;5-HT1B receptors;5-HT1A receptors;5-HTP;8-OH-DPAT;TFMPP;serotonin;RAT EJACULATORY BEHAVIOR; COPULATORY-BEHAVIOR; 5-HYDROXYTRYPTAMINE(1B) RECEPTOR; ANTAGONISTS NAD-299; PREPULSE INHIBITION; WILD-TYPE; AGONISTS; 8-OH-DPAT; COCAINE; LACKING SO - British Journal of Pharmacology 2002 ;136(8):1127-1134 6627 UI - 11385 AU - Rodriguez-Palma M AU - Garcia AV AU - Lado C AD - Univ Autonoma Tlaxcala, Ctr Invest Ciencias Biol, Ixtacuixtla 90122, Tlaxcala, MexicoCSIC, Real Jardin Bot Madrid, Madrid 28014, SpainRodriguez-Palma, M, Univ Autonoma Tlaxcala, Ctr Invest Ciencias Biol, Km 10-5 Carr, Ixtacuixtla 90122, Tlaxcala, Mexico TI - Corticolous myxomycetes associated with four tree species in Mexico AB - Results obtained from 108 moist chamber cultures with bark from living trees of four species of the Mexican temperate forests, Abies religiosa, Juniperus deppeana, Pinus pseudostrobus and Quercus crassipes, are presented. A total of 23 species of myxomycetes were recognized, of which seven are first records for Mexico. Clastoderma pachypus, Echinostelium apitectum and E. brooksii are new species for the Neotropics, and information on the presence of Licea nannengae in the American Continent is reported here for the first time. Some questions are raised on the variation of Comatricha laxa MH - Mexico|Tlaxcala MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 4 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000174968200030 L2 - bark culture;Neotropics;distribution;taxonomy SO - Mycotaxon 2002 ;81():345-355 6628 UI - 10306 AU - Rodriguez-Romo S AU - Taft E AD - Univ Nacl Autonoma Mexico, Ctr Invest Teor, Cuautitlan 54740, Edo De Mexico, MexicoRutgers State Univ, Dept Math, Piscataway, NJ 08854, USARodriguez-Romo, S, Univ Nacl Autonoma Mexico, Ctr Invest Teor, Campus Cuautitlan,Apdo Postal 142, Cuautitlan 54740, Edo De Mexico, Mexico TI - Some quantum-like Hopf algebras which remain noncommutative when q=1 AB - Starting with only three of the six relations defining the standard (Manin) GL(q)(2), we try to construct a quantum group. The antipode condition requires some new relations, but the process stops at a Hopf algebra with a Birkhoff-Witt basis of irreducible monomials. The quantum determinant is group-like but not central, even when q = 1. So, the two Hopf algebras constructed in this way are not isomorphic to the Manin GL(q)(2), all of whose group-like elements are central. Analogous constructions can be made starting with the Dipper-Donkin version of GL(q)(2), but these turn out to be included in the two classes of Hopf algebras described above MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0377-9017 UR - ISI:000177986700004 L2 - Hopf algebras;quantum groups;DEFORMATIONS SO - Letters in Mathematical Physics 2002 ;61(1):41-50 6629 UI - 11980 AU - Rodriguez-Saldana J AU - Morley JE AU - Reynoso MT AU - Medina CA AU - Salazar P AU - Cruz E AU - Torres ALN AD - St Louis Univ, Hlth Sci Ctr, Div Geriatr Med, St Louis, MO 63104, USAUNAM, Pacific Operating Ctr, Sch Med, Dept Publ Hlth, Mexico City, DF, MexicoUNAM, Pacific Operating Ctr, Sch Med, AFINES Program, Mexico City, DF, MexicoSt Louis VAMC, GRECC, St Louis, MO, USAHosp Dr Dario Fernande ISSSTE, Coordinac Internal Med, Mexico City, DF, MexicoMorley, JE, St Louis Univ, Hlth Sci Ctr, Div Geriatr Med, 1402 S Grand Blvd,Room M238, St Louis, MO 63104 USA TI - Diabetes mellitus in a subgroup of older Mexicans: Prevalence, association with cardiovascular risk factors, functional and cognitive impairment, and mortality AB - OBJECTIVES: To examine the prevalence and effects of diabetes mellitus in a subgroup of older Mexicans to allow comparisons to older persons of Mexican origin living in the United States. DESIGN: Longitudinal study. SETTING: High-rise retirement housing in Mexico City. PARTICIPANTS: Seven hundred eighty-five public servants and their family members aged 65 and older. MEASUREMENTS: Geriatric survey of function; mental status and depression; a physical examination; and blood samples for glucose and cholesterol. RESULTS: The prevalence of diabetes mellitus in this population was 15.1%, substantially lower than the prevalence reported in people of Mexican origin living in the United States. Nondiabetics were more obese than diabetics. Diabetes mellitus was more common in men than women. The mortality rate was greater in diabetics than nondiabetics (relative risk = 1.73, P < .05). Diabetics had more coronary artery disease and were more likely to die from myocardial infarction and neoplasms than nondiabetics. Diabetics were more likely to be functionally impaired (P < .0001) but no more likely to fall or to have fractures. Diabetics did not differ from nondiabetics in cognitive impairment or level of dysphoria. CONCLUSION: These studies highlight some important similarities and differences in comparing a middle class subgroup of older diabetics in Mexico City with diabetics of Mexican origin living in the United States MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 16 U4 - Geriatrics & Gerontology;Gerontology U5 - J;Article AV - English IS - 0002-8614 UR - ISI:000173236200018 L2 - diabetes mellitus;function;mortality;Mexico;CORONARY HEART-DISEASE; GLUCOSE-TOLERANCE; ELDERLY PATIENTS; HEALTH BURDEN; AMERICANS; POPULATION; ADULTS; CARE; COMPLICATIONS; COMMUNITY SO - Journal of the American Geriatrics Society 2002 ;50(1):111-116 6630 UI - 10892 AU - Rodriguez-Sosa M AU - Satoskar AR AU - Calderon R AU - Gomez-Garcia L AU - Saavedra R AU - Bojalil R AU - Terrazas LI AD - Inst Nacl Cardiol Ignacio Chavez, Dept Immunol, Mexico City 14080, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USATerrazas, LI, Inst Nacl Cardiol Ignacio Chavez, Dept Immunol, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Chronic helminth infection induces alternatively activated macrophages expressing high levels of CCR5 with low interleukin-12 production and Th2-biasing ability AB - Helminth infections induce Th2-type biased immune responses. Although the mechanisms involved in this phenomenon are not yet clearly defined, antigen-presenting cells (APC) could play an important role in this process. Here, we have used peritoneal macrophages (F4/80+) recruited at different times after challenge with Taenia crassiceps as APC and tested their ability to regulate Th1/Th2 differentiation. Macrophages from acute infections produced high levels of interleukin-12 (IL-12) and nitric oxide (NO), paralleled with low levels of IL-6 and prostaglandin E-2 (PGE(2)) and with the ability to induce strong antigen-specific CD4(+) T-cell proliferation in response to nonrelated antigens. In contrast, macrophages from chronic infections produced higher levels of IL-6 and PGE(2) and had suppressed production of IL-12 and NO, associated with a poor ability to induce antigen-specific proliferation in CD4(+) T cells. Failure to induce proliferation was not due to a deficient expression of accessory molecules, since major histocompatibility complex class II, CD40, and B7-2 were up-regulated, together with CD23 and CCR5 as infection progressed. These macrophages from chronic infections were able to bias CD4(+) T cells to produce IL-4 but not gamma interferon (IFN-gamma), contrary to macrophages from acute infections. Blockade of B7-2 and IL-6 and inhibition of PGE(2) failed to restore the proliferative response in CD4(+) T cells. Furthermore, studies using STAT6(-/-) mice revealed that STAT6-mediated signaling was essential for the expansion of these alternatively activated macrophages. These data demonstrate that helminth infections can induce different macrophage populations that have Th2-biasing properties MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 40 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000176302600041 L2 - ANTIGEN-PRESENTING CELLS; CD4(+) T-CELLS; DENDRITIC CELLS; IMMUNE-RESPONSE; SCHISTOSOMA-MANSONI; PROSTAGLANDIN E-2; INHIBIT PROLIFERATION; CYTOKINE RESPONSES; TAENIA-CRASSICEPS; HUMAN MONOCYTES SO - Infection and Immunity 2002 ;70(7):3656-3664 6631 UI - 11565 AU - Rodriguez-Sosa M AU - David JR AU - Bojalil R AU - Satoskar AR AU - Terrazas LI AD - Inst Nacl Cardiol Ignacio Chavez, Dept Immunol, Mexico City 14080, DF, MexicoHarvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115, USAOhio State Univ, Dept Microbiol, Columbus, OH 43210, USATerrazas, LI, Inst Nacl Cardiol Ignacio Chavez, Dept Immunol, Mexico City 14080, DF, Mexico TI - Cutting edge: Susceptibility to the larval stage of the helminth parasite Taenia crassiceps is mediated by Th2 response induced via STAT6 signaling AB - Using STAT6(-/-) BALB/c mice, we analyzed the role of STAT6-induced Th2 response in determining the outcome of murine cysticercosis caused by the helminth parasite Taenia crassiceps. After T. crassiceps infection, wild-type BALB/c mice developed a strong Th2-like response; produced high levels of IgG1, IgE, IL-4, as well as IL-13; and remained susceptible to T. crassiceps. In contrast, similarly infected STAT6(-/-) mice mounted a strong Th1-like response; produced high levels of IgG2a, IL-12, IFN-gamma, as well as nitric oxide; and efficiently controlled T. crassiceps infection. These findings demonstrate that Th2-like response induced via STAT6-mediated signaling pathway mediates susceptibility to T. crassiceps and, furthermore, that unlike the case in most helminths, immunity against T. crassiceps is mediated by a Th1-like rather than Th2-like response MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 25 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000174566400003 L2 - SCHISTOSOMA-MANSONI; PROTECTIVE IMMUNITY; TRYPANOSOMA-CRUZI; MICE; RESISTANCE; EXPULSION; NEMATODES; INFECTION; RECEPTOR; DEFENSE SO - Journal of Immunology 2002 ;168(7):3135-3139 6632 UI - 10746 AU - Rodriguez-Valencia JA AU - Caballero-Alegria F AD - CRIP Ensenada, Inst Nacl Pesca, El Sauzel, Baja California, MexicoRodriguez-Valencia, JA, Alfred Wegener Inst Polar & Marine Res, Wadden Sea Stn Sylt, D-25992 List Auf Sylt, Germany TI - Temporal fluctuations (1989-1999) in the populations of Haliotis fulgens and H-corrugata (Gastropoda : Haliotidae), at Islas San Benito (Baja California, Mexico) AB - In our study area, green abalone (Haliotis fulgens) was more abundant than pink abalone (H. corrugata) until the end of the 1980s, but nowadays, both species have similar density levels and are close to values were recruitment failures may occur. In comparison to pink abalone, green abalone showed higher abundance of legal-sized stock and condition factors. Abundance of the legal-sized stock of both species has significantly decreased, but the density extracted by fishing, remained the same. Overfishing of legal sizes and recruits, or poaching, may have not significantly contributed to the observed patterns. Only the proportion of recruits of pink abalone decreased significantly along the time and its fluctuation patterns support the ideal that non-severe "El Nino" events may have a positive effect on recruitment. The lack of significant changes in recruitment of green abalone suggests that this effect may be species-specific. On the other hand, our results indicate that "El Nino" events lead to poor physiological condition. Mean condition factors of both species decreased significantly along the time, and are significantly related with the mean annual surface temperatures. The proportion of sexually mature organisms of both sexes, in both species, also decreased significantly along the time and could be a by-product of impoverished condition. Additionally, the sex ratio of green abalone varied significantly along the time, in favor to males MH - Germany MH - Mexico|Baja California PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000176764900023 L2 - abalone surveys;long-term dynamics;Baja California;Haliotis fulgens;H. corrugata;ABALONE GENUS HALIOTIS; CLIMATE-CHANGE; ABUNDANCE; FISHERY; HABITAT; RUBRA SO - Journal of Shellfish Research 2002 ;21(1):163-171 6633 UI - 11889 AU - Rodriguez A AU - Mezzetti M AU - Fodor P AU - Colas R AD - Univ Pittsburgh, Basic Met Proc Res Inst, Pittsburgh, PA 15261, USAEmpresas Riga SA CV, Cienega De Flores 65550, NL, Mexico TI - Forming of seamless pipe fittings AB - Analysis and results of the high temperature forming of seamless pipe fittings produced at a local factory are presented in this work. The studies were conducted by recording the thermal evolution in different parts of the piece as it was being forged, which was done by placing a series of type K thermocouples within the part and logging the data into a computer driven system. The initial trials put in evidence the need to change the heating practice in order to ensure a greater thermal homogeneity. Metallographic evaluation was carried out on formed pieces to study variations in their microstructure before and after the changes in the heating practice were made. Modification of this practice resulted in improvements in quality, such as the reduction in the variation in microstructure and wall thickness, as well as an increase in productivity, as the pressing speed was augmented. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Industrial;Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0924-0136 UR - ISI:000173548200059 L2 - forming;hot working;seamless fittings;microstructal evolution;heating SO - Journal of Materials Processing Technology 2002 ;120(1-3):432-437 6634 UI - 10745 AU - Rodriguez JL AU - De Aza AH AU - Pena P AU - Campo J AU - Convert P AU - Turrillas X AD - CSIC, Inst Ceram & Vidrio, Dept Ceram, Madrid 28500, SpainInst Max Von Laue Paul Langevin, F-38042 Grenoble, FranceCSIC, Inst Ciencias Construcc Eduardo Torroja, Madrid 28032, SpainDe Aza, AH, IPN, CINVESTAV, Carr, Saltillo, Coahuila, Mexico TI - Study of zircon-dolomite reactions monitored by neutron thermodiffractometry AB - The reaction mechanism that takes place in ZrSiO4-Mg Ca(CO3)(2) mixtures was studied in air up to 1300degreesC by collecting neutron diffraction patterns during the heating ramp. Neutron diffraction intensities were used to monitor and establish the mechanism of reaction that occurs in successive stages. (a) MgCa(CO3)(2) decomposition yielding MgO and CaCO3; (b) CaCO3 decomposition; (c) reactions between CaO, MgO, and ZrSiO4 involving the formation of phases such as: tetragonal-ZrO2, alpha-Ca2SiO4, and Ca3MgSi2O8, some of them acting as transitory phases; and (d) formation of CaZrO3. The results obtained by this technique agree with data obtained by differential thermal analysis and thermogravimetry. The final product has a porous structure, due to the release of CO2, with a very narrow pore size distribution (approximate to 1 mum). This open-porosity can be controlled by tailoring the reaction sintering process. (C) 2002 Elsevier Science (USA) MH - France MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000176808000023 L2 - neutron thermodiffractometry;solid-state reactions;MgCa(CO3)2;ZrSiO4;porous ceramics;DIFFRACTION; DECOMPOSITION SO - Journal of Solid State Chemistry 2002 ;166(2):426-433 6635 UI - 9176 AU - Rodriguez LF AU - Anglada G AU - Torrelles JM AU - Mendoza-Torres JE AU - Haschick AD AU - Ho PTP AD - UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USA. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Inst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, Mexico. MIT, Haystack Observ, Westford, MA 01886, USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USA TI - VLA Observations of water maser emission associated with SVS 13 AB - The young stellar object SVS 13 has been proposed as the powering source of the HH 7-11 objects. Recent observations have revealed that in the radio continuum (3.6-cm) the source is a binary separated by about 0."3 in the east-west direction. We present Very Large Array observations, made in the highest angular resolution A configuration, of H2O maser emission toward this source. Our data show that the H2O spots appear to be segregated in two velocity groups: a group with radial velocity similar to that of the ambient cloud (V-LSR similar or equal to 8 km s(-1)) that is associated with the western radio source, and a blueshifted (by similar to20 km s(-1)) velocity group that is associated with the eastern radio source. We discuss the possible implications of this observation MH - Mexico|Michoacan MH - Mexico|Puebla MH - Spain MH - USA T3 - COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLESIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBW16P AV - English IS - 0074-1809 UR - ISI:000181054300011 SO - 2002 ;(206):59-62 6636 UI - 10659 AU - Rodriguez LF AU - Goss WM AU - Williams R AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58190, Michoacan, MexicoNatl Radio Astron Observ, Socorro, NM 87801, USASpace Telescope Sci Inst, Baltimore, MD 21218, USARodriguez, LF, Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58190, Michoacan, Mexico TI - VLA observations of HI in the Helix Nebula (NGC 7293) AB - We report the detection of 21 cm line emission from H I in the planetary nebula NGC 7293 (the Helix Nebula). The observations, made with the Very Large Array, show the presence of a ring of atomic hydrogen that is associated with the outer portion of the ionized nebula. This ring is most probably gas ejected in the asymptotic giant branch phase that has been subsequently photodissociated by radiation from the central star. The H I emission spreads over similar to50 km s(-1) in radial velocity. The mass in H I is similar to0.07 M., about 3 times larger than the mass in molecular hydrogen and comparable to the mass in ionized hydrogen MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000176978200017 L2 - planetary nebulae : individual (NGC 7293);radio lines : ISM;stars : AGB and post-AGB;PLANETARY-NEBULAE; COMETARY KNOTS; NGC-7293; EMISSION; ENVELOPES; HYDROGEN; MODELS; STARS SO - Astrophysical Journal 2002 ;574(1):179-186 6637 UI - 10775 AU - Rodriguez LF AU - Anglada G AU - Torrelles JM AU - Mendoza-Torres JE AU - Haschick AD AU - Ho PTP AD - UNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACSIC, IEEC, ES-08034 Barcelona, SpainCSIC, Inst Ciencias Espacio, ES-08034 Barcelona, SpainInst Nacl Astrofis Opt & Electr, Puebla 72840, MexicoMIT, Haystack Observ, Westford, MA 01886, USARodriguez, LF, UNAM, Inst Astron, Campus Morelia,Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico TI - VLA observations of water maser emission associated with SVS 13 and other sources in NGC 1333 AB - The young stellar object SVS 13 is believed to power the chain formed by the HH 7-11 objects. Recent observations have revealed that in the radio continuum (3.6-cm) the source is a binary with components separated by about 0."3 in the east-west direction. The members of the binary are named VLA 4A (western component) and VLA 4B (eastern component). In an attempt to ascertain which of the two components of the binary is the most likely candidate to drive the outflow, we obtained accurate positions for the H2O maser spots toward this source, also known as H2O(A), derived from Very Large Array observations in its highest angular resolution A configuration. We detected a total of eleven spots over four observational sessions (made in the years 1983, 1985, 1988, and 1989). The spots are segregated in two velocity groups: a velocity group with v(LSR) similar to that of the ambient cloud (v(LSR) similar or equal to 8 km s(-1)), for which we detected five features (with v(LSR) in the range of 6.5 to 12.2 km s(-1)) and a blueshifted velocity group (six features with vLSR in the range of -25.4 to 5.6 km s(-1)). Remarkably, all the spots in the first velocity group are associated with VLA 4A, while all the spots in the blueshifted velocity group are associated with VLA 4B. We discuss the possible implications of this observation. We also present accurate positions of the H2O maser HH 7(B) and of the masers associated with IRAS4B (VLA 28) and IRAS7 (VLA 27, the exciting source of HH 6) MH - Mexico|Michoacan MH - Mexico|Puebla MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000176817200028 L2 - ISM : Herbig-Haro objects;ISM : jets and outflows;masers;stars : pre-main sequence;HERBIG-HARO OBJECTS; HH 7-11; NGC-1333; STAR; REGION SO - Astronomy & Astrophysics 2002 ;389(2):572-576 6638 UI - 10774 AU - Rodriguez M AD - Inst Astrofis Canarias, Tenerife 38200, Canarias, SpainRodriguez, M, INAOE, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - Iron abundance in HII regions AB - Optical CCD spectra are used to determine the Fe abundances at several positions inside seven bright Galactic H II regions. The observed [Fe III] line ratios are compared with the predictions of different sets of collision strengths and transition probabilities for this ion to select the atomic data providing the best fit to the observations. The values found for the Fe++ and Fe+ abundances, along with ionization correction factors for the contribution of Fe3+, obtained from available grids of photoionized models, imply that the Fe/O ratio in the ionized gas is between 2% and 30% of solar. The Fe abundances derived for each area are correlated both with the degree of ionization and the colour excess. A possible explanation is suggested, namely the presence of a population of small grains, probably originating from the fragmentation of larger grains. These small grains would release Fe atoms into the gas after the absorption of energetic photons; the small grains surviving this destruction process would be swept out of the ionized region by the action of radiation pressure or stellar winds. An indication of a further and more efficient destruction agent is given by the high Fe abundance derived for a position sampling the optical jet H 399 in M 20, where dust destruction due to shock waves has presumably taken place MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000176817200026 L2 - HII regions;ISM : abundances;dust, extinction;ELECTRON-IMPACT EXCITATION; ORION NEBULA; ATOMIC DATA; FE-III; COLLISION STRENGTHS; PHYSICAL CONDITIONS; INTERSTELLAR-MEDIUM; RATE COEFFICIENTS; TRANSITION-PROBABILITIES; FORBIDDEN TRANSITIONS SO - Astronomy & Astrophysics 2002 ;389(2):556-567 6639 UI - 10179 AU - Rodriguez MC AU - Margos G AU - Compton H AU - Ku M AU - Lanz H AU - Rodriguez MH AU - Sinden RE AD - Univ London Imperial Coll Sci Technol & Med, Dept Biol, Infect & Immun Sect, London SW7 2AZ, EnglandCtr Invest Sobre Enfermedades Infecciosas, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoUniv Cambridge, Ctr Vet Sci, Microbial Immunol Grp, Cambridge CB3 0ES, EnglandUniv Philadelphia, Philadelphia, PA, USARodriguez, MC, Univ London Imperial Coll Sci Technol & Med, Dept Biol, Infect & Immun Sect, Alexander Fleming Bldg,Imperial Coll Rd, London SW7 2AZ, England TI - Plasmodium berghei: routine production of pure gametocytes, extracellular gametes, zygotes, and ookinetes MH - United Kingdom MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Parasitology U5 - J;Article AV - English IS - 0014-4894 UR - ISI:000178327700010 L2 - TRANSMISSION-BLOCKING ANTIBODIES; SEXUAL DEVELOPMENT; MONOCLONAL-ANTIBODIES; MALARIAL PARASITES; SURFACE PROTEIN; TRANSFORMATION; GALLINACEUM; ANTIGENS; INVITRO; GAMETOCYTOGENESIS SO - Experimental Parasitology 2002 ;101(1):73-76 6640 UI - 11768 AU - Rodriguez ME AU - Restrepo JI AU - Carr AJ AD - Natl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoUniv Calif San Diego, Dept Struct Engn, La Jolla, CA 92093, USAUniv Canterbury, Dept Civil Engn, Christchurch 1, New ZealandRodriguez, ME, Natl Autonomous Univ Mexico, Apartado Postal 70-290, Mexico City 04510, DF, Mexico TI - Earthquake-induced floor horizontal accelerations in buildings AB - Floor horizontal accelerations are needed for obtaining forces for the design of diaphragms. for the design of their connections and for the design of non-structural components and equipment supported by structures. Large floor horizontal accelerations have been recorded in buildings during earthquakes. Such accelerations have been responsible for inertia forces causing damage to services and are a major reason for structural damage and even building collapse. This paper describes an analytical investigation into earthquake-induced floor horizontal accelerations that arise in regular buildings built with rigid diaphragms. The paper also describes several methods prescribed by design standards and proposes a new method. The method is based on modal superposition modified to account for the inelastic response of the building's lateral force resisting system. Results obtained from time-history inelastic analysis are compared with the proposed method. Copyright (C) 2001 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Civil;Engineering, Geological U5 - J;Article AV - English IS - 0098-8847 UR - ISI:000173870500011 L2 - floor accelerations;diaphragms;non-structural components;non-linear analysis;seismic demands;building codes;SEISMIC BEHAVIOR; DESIGN; DIAPHRAGMS; WALLS SO - Earthquake Engineering & Structural Dynamics 2002 ;31(3):693-718 6641 UI - 10807 AU - Rodriguez O AU - Picano E AU - Fedele S AU - Morelos M AU - Marzilli M AD - CNR, Inst Clin Physiol, I-56100 Pisa, ItalyInst Mexicano Seguridad Social, Mexico City, DF, MexicoPicano, E, CNR, Inst Clin Physiol, Via Moruzzi 1, I-56100 Pisa, Italy TI - Noninvasive prediction of coronary artery disease progression by comparison of serial exercise electrocardiography and dipyridamole stress echocardiography AB - Background: The possibility of noninvasive prediction of angiographically assessed coronary artery disease (CAD) progression by comparison of serial studies of exercise electrocardiography (EET) and dipyridamole stress echocardiography (DET) is not known. Aim: To assess the relative value of EET and DET in predicting angiographically assessed progression of CAD. Methods: From the Institute of Clinical Physiology, National Research Council, Pisa Italy stress echo data bank (1983-1998), we selected 46 patients with two repeated EET, DET and coronary angiography (CA) in two different hospital admissions (46 30 months). A priori, angiographic progressors were defined as any stenosis progression to occlusion and/or any stenosis >30% with >20% stenosis progression measured by visual and quantitative CA. EET progressors were defined as a previous negative test becoming positive or as a positive test with decrease in ischemic threshold response in the second test. DET progressors were defined as previous negative test becoming positive or as a positive test with a more severe ischemic response in the second test. Results: Angiographic progressors were 31/46 patients (67%) and angiographic nonprogressors were 15/46 (33%). When angiography was taken as the gold standard, there were no differences in sensitivity for EET and DET (87 vs. 87%). Specificity was significantly higher for DET (93 vs. 40% p =< 0.001). By κ statistics DET had a good concordance (κ = 0.768) and EET a poor concordance (κ = 0.299) with angiographic progression. Conclusion: DET is more accurate than EET at predicting angiographically assessed CAD progression MH - Italy MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0167-9899 UR - ISI:000176545900003 L2 - atherosclerosis;dipyridamole;echocardiography;stress;CARDIAC ALLOGRAFT VASCULOPATHY; POSITRON EMISSION TOMOGRAPHY; LOW-FAT DIET; CHEST PAIN; MYOCARDIAL PERFUSION; SYNDROME-X; PROGNOSTIC VALUE; CLINICAL-TRIALS; ANGINA-PECTORIS; ANGIOGRAPHY SO - International Journal of Cardiovascular Imaging 2002 ;18(2):93-99 6642 UI - 10781 AU - Rodriguez RE AU - Serrano K AU - Herrera MS AD - Texas Wesleyan Univ, Ft Worth, TX 76134, USAInst Tecnol & Estudios Superlores Monterrey, Dept Quim, Mexico City, DF, Mexico TI - Oxidative modification of glucose-6-phosphate isomerase by Chloroamine-T: Kinetic and electrophoretic analysis MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296701101 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():U214-U214 6643 UI - 10782 AU - Rodriguez RE AU - Olvera E AU - Duran S AD - Texas Wesleyan Univ, Dept Chem, Ft Worth, TX 76134, USAInst Tecnol & Estudios Superiores Monterrey, Dept Quim, Mexico City, DF, Mexico TI - Intermediate formation by the deuteroferriheme-T-butylhydroperoxide system: A kinetic study MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296701261 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():U237-U237 6644 UI - 10934 AU - Rodriguez SR AU - Siebe C AU - Komorowski JC AU - Abrams M AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoOVSG, Inst Phys Globe Paris, Gourbeyre 97113, GuadeloupeCALTECH, Jet Prop Lab, Pasadena, CA 91109, USARodriguez, SR, Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - The Quetzalapa Pumice: a voluminous late Pleistocene rhyolite deposit in the eastern Trans-Mexican Volcanic Belt AB - The study area is located in the cast part of the Trans-Mexican Volcanic Belt, in the Las Cumbres Volcanic Complex (LCVC) which lies between two large stratovolcanoes: Pico de Orizaba (5700 m a.s.l.) to the south, and Cofre de Perote (4200 m a.s.l.) to the NNE. The most conspicuous structure of the LCVC is a 4-km-diameter circular crater with a dacitic dome in the center, which constitutes the remains of a destroyed stratovolcano. The Quetzalapa Pumice (QP) was produced by a plinian eruption that was dated by the C-14 method at 20000 yr. BP. The eruptive sequence consists predominantly of pumice fall deposits and scarce intra-plinian pyroclastic flow deposits, which crop out on the west flank of the LCVC. The absence of post-plinian ignimbrite deposits is striking. The deposits are well sorted, clast-supported with reverse grading at the base, with a medium to high accessory lithics content. The maximum average thickness of the deposit in the proximal areas is about 15 m and has been divided into three members: the Basal Member (BM), 2 m thick with four submembers (BMf(1), BMf(2). BMf(3), and BMafl), the Intermediate Member (IM), 10 m thick with two submembers (IMpf and IMaf). and the Upper Member (UM), 3 m thick with four submembers (UMpl, UMsdf, UMwaf, and UMpls). The predominant component of the fall deposits is a white, highly vesiculated pumice with 71% SiO2 content. Plagioclase is the most abundant mineral followed by 1-3-mm-long biotite phenocrysts. The accessory lithics are lavas mostly of andesitic composition. Their abundance increases toward the uppermost levels of the sequence. We calculate a minimum volume of 8.4 km(3) (2.22 km(3) dense rock equivalent), for the entire QP deposit. Isopach and isopleth maps show that the IM deposit has an elongated distribution with a NNE-SSW direction, whereas the UM deposit has a circular distribution. We estimate a maximum eruptive column height for the IM of 20 km. Field studies and isopach and isopleth maps indicate that the eruptive column was affected by a strong wind. Previous studies located the QP source in the Las Cumbres crater. However. based on the isopach and isopleth distribution, and the lack of pumice fall deposits inside the Las Cumbres crater, we consider that the QP emission center is located on the west flank of the LCVC, and was buried by its own pumice fall deposits. It coincides with an explosion crater called La Capilla formed during the closing phase of the QP eruption. A 'pumice fountain' model is proposed to explain the observed sequence of deposits. According to this model, the material was emitted through a 'hose-type' conduit during a monogenetic eruption of rhyolitic composition. This kind of volcanic activity is not extensively reported in the literature. (C) 2002 Elsevier Science B.V. All rights reserved MH - Guadeloupe MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000176143100011 L2 - rhyolitic pumice;Trans-Mexican Volcanic Belt;plinian deposits;pumice fall deposits;PICO-DE-ORIZABA; TEPHRA FALL DEPOSITS; PLINIAN ERUPTIONS; CITLALTEPETL VOLCANO; EXPLOSION; PUEBLA; VOLUME SO - Journal of Volcanology and Geothermal Research 2002 ;113(1-2):177-212 6645 UI - 10609 AU - Rogers JD AU - San Martin F AU - Ju YM AD - Washington State Univ, Dept Plant Pathol, Pullman, WA 99164, USABIOTA AC, CD Victoria, Tamaulipas, MexicoAcad Sinica, Inst Bot, Taipei 11529, TaiwanRogers, JD, Washington State Univ, Dept Plant Pathol, Pullman, WA 99164 USA TI - Three new taxa of Camillea from Costa Rica AB - Three new taxa of Camillea from Costa Rica are described. C. coroniformis has distinctive ostiolar rims and ascospores ornamented with contiguous rods. C. labiatirima has slightly ornamented ascospores with a germ slit. This is the first among species of Camillea reported to have an ascospore germ slit. C. heterostoma var. microspora has smaller ascospores than the typical variety MH - Mexico|Tamaulipas MH - Taiwan MH - USA PB - HORN: VERLAG FERDINAND BERGER SOHNE GESELLSCHAFT MBH RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0082-0598 UR - ISI:000177052200009 L2 - Camillea;Costa Rica;pyrenomycetes;Xylariaceae;HYPOXYLON SO - Sydowia 2002 ;54(1):84-90 6646 UI - 10610 AU - Rogers JD AU - San Martin F AU - Ju YM AD - Washington State Univ, Dept Plant Pathol, Pullman, WA 99164, USABIOTA AC, CD Victoria, Tamaulipas, MexicoAcad Sinica, Inst Bot, Taipei 11529, TaiwanRogers, JD, Washington State Univ, Dept Plant Pathol, Pullman, WA 99164 USA TI - A reassessment of the Xylaria on Liquidambar fruits and two new taxa on Magnolia fruits AB - Xylaria liquidambar sp. nov. is proposed for a common inhabitant of Liquidambar species fruits that is usually considered to be X. persicaria. The status of X. persicaria is discussed. Xylaria jaliscoensis sp. nov. is described from fruits of Magnolia iltisiana from Mexico. Xylaria magnoliae var. microspora var. nov. is described from fruits of Magnolia sp. from Thailand MH - Mexico|Tamaulipas MH - Taiwan MH - USA PB - HORN: VERLAG FERDINAND BERGER SOHNE GESELLSCHAFT MBH RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0082-0598 UR - ISI:000177052200010 L2 - Liquidambar;Magnolia;Xylaria;Xylariaceae SO - Sydowia 2002 ;54(1):91-97 6647 UI - 11374 AU - Rojas-Bracho L AU - Suh HH AU - Oyola P AU - Koutrakis P AD - Harvard Univ, Sch Publ Hlth, Boston, MA 02115, USAComis Nacl Medio Ambiente, Santiago, ChileRojas-Bracho, L, Direcc Gen Salud Ambiental, Mariano Escobedo 366-6 Piso,Col Anzures, Mexico City 11590, DF, Mexico TI - Measurements of children's exposures to particles and nitrogen dioxide in Santiago, Chile AB - An exposure study of children (aged 10-12 years) living in Santiago, Chile, was conducted. Personal, indoor and outdoor fine and inhalable particulate matter (< 2.5 mum in diameter, PM2.5 and < 10 mum in diameter, PM10, respectively), and nitrogen dioxide (NO2) were measured during pilot (N = 8) and main (N 20) studies, which were conducted during the winters of 1998 and 1999, respectively. For the main study, personal, indoor and outdoor 24-h samples were collected for five consecutive days. Similar mean personal, indoor and outdoor PM2.5 concentrations (69.5, 68.5 and 68.1 mug/m(3), respectively) were found. However, for coarse particles (calculated as the difference between measured PM10 and PM2.5, PM2.5-10), indoor and outdoor levels (35.4 and 47.4 mug/m(3)) were lower than their corresponding personal exposures (76.3 mug/m(3)). Indoor and outdoor NO2 concentrations were comparable (35.8 and 36.9 ppb) and higher than personal exposures (25.9 ppb). Very low ambient indoor and personal O-3 levels were found, which were mostly below the method's limit of detection (LOD). Outdoor particles contributed significantly to indoor concentrations, with effective penetration efficiencies of 0.61 and 0.30 for PM2.5 and PM2.5-10, respectively. Personal exposures were strongly associated with indoor and outdoor concentrations for PM2.5 All rights reserved. but weakly associated for PM2.5-10. For NO2 weak associations were obtained for indoor-outdoor and personal-outdoor relationships. This is probably a result of the presence of gas cooking stoves in all the homes. Median I/O, P/I and P/O ratios for PM2.5 were close to unity, and for NO2 they ranged between 0.64 and 0.95. These ratios were probably due to high ambient PM2.5 and NO2 levels in Santiago, which diminished the relative contribution of indoor sources and subjects' activities to indoor and personal PM2.5 and NO2 levels. (C) 2002 Elsevier Science B.V MH - Chile MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000175007600008 L2 - personal exposure;indoor and outdoor microenvironments;particulate matter;fine particles;coarse particles;inhalable particles;nitrogen dioxide;penetration efficiency;ventilation;air exchange rates;limit of detection;ASSESSMENT METHODOLOGY PTEAM; AIR-POLLUTION; PERSONAL EXPOSURE; ACTIVITY PATTERNS; INDOOR; OUTDOOR; PARTICULATE; MORTALITY; QUALITY; ASSOCIATION SO - Science of the Total Environment 2002 ;287(3):249-264 6648 UI - 10392 AU - Rojas-Espinosa O AU - Wek-Rodriguez K AU - rce-Paredes P AU - guilar-Torrentera F AU - Truyens C AU - Carlier Y AD - Natl Polytech Inst, Natl Sch Biol Sci, Dept Immunol, Mexico City, DF, MexicoFree Univ Brussels, Fac Med, Parasitol Lab, Brussels, BelgiumRojas-Espinosa, O, Esuela Nacl Ciencias Biol, Inst Politecn Nacl, Dept Immunol, Carpio & Plan Ayala, Mexico City 11340, DF, Mexico TI - Contrary to BCG, MLM fails to induce the production of TNF alpha and NO by macrophages MH - Belgium MH - Mexico|Distrito Federal PB - GREENVILLE: INT JOURNAL LEPROSY RP - NOT IN FILE U3 - TC 1 U4 - Microbiology;Pathology;Tropical Medicine U5 - J;Article AV - English IS - 0148-916X UR - ISI:000177667900003 L2 - TUMOR-NECROSIS-FACTOR; MYCOBACTERIUM-BOVIS BCG; NITRIC-OXIDE PRODUCTION; PERITONEAL-MACROPHAGES; ANTIMICROBIAL ACTIVITY; ACTIVATED MACROPHAGES; ALVEOLAR MACROPHAGES; MURINE MACROPHAGES; IFN-GAMMA; IN-VITRO SO - International Journal of Leprosy and Other Mycobacterial Diseases 2002 ;70(2):111-118 6649 UI - 9423 AU - Rojas F AU - Cota E AU - Ulloa SE AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701, USARojas, F, UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Quantum dynamics, dissipation, and asymmetry effects in quantum dot arrays AB - We study the role of dissipation and structural defects on the time evolution of quantum dot arrays with mobile charges under external driving fields. These structures, proposed as quantum dot cellular automata, exhibit interesting quantum dynamics which we describe in terms of equations of motion for the density matrix. Using an open system approach, we study the role of asymmetries and the microscopic electron-phonon interaction on the general dynamical behavior of the charge distribution (polarization) of such systems. We find that the system response to the driving field is improved at low temperatures (and/or weak phonon coupling), before deteriorating as temperature and asymmetry increase. In addition to the study of the time evolution of polarization, we explore the linear entropy of the system in order to gain further insights into the competition between coherent evolution and dissipative processes MH - Mexico|Baja California MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000180279400072 L2 - CELLULAR-AUTOMATA; BEHAVIOR; SYSTEMS; CELLS SO - Physical Review B 2002 ;66(23): 6650 UI - 11109 AU - Rojas F AU - Kornhauser I AU - Felipe C AU - Esparza JM AU - Cordero S AU - Dominguez A AU - Riccardo JL AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Capillary condensation in heterogeneous mesoporous networks consisting of variable connectivity and pore-size correlation AB - Heterogeneous three-dimensional mesoporous networks (A. J. Ramirez-Cuesta, S. Cordero, F. Rojas, R. J. Faccio and J. L. Riccardo, J. Porous Mater., 2001, 8, 61, ref. 1) constructed under the premises of the dual site bond model have been used as probe substrates to study the effects of variable connectivity and pore-size correlation on the aspects of both hysteresis loops and primary sorption scanning curves. The shapes of the hysteresis loops obtained from sorption simulation in networks of diverse morphologies are compared and discussed. It is found that the precursor structural parameters of the Monte Carlo simulated networks together with the sorption algorithm used in this work, can lead to IUPAC types H1, H2 and H3-like hysteresis loops, depending on the values chosen for the pore-size distribution parameters and mean connectivity. Network morphology also influences greatly the mechanisms of sorption processes in poorly or highly size correlated porous substrates. Sorption results on these 3-D porous specimens help to visualize the extents of pore blocking (vapour percolation) and delayed adsorption (liquid percolation) phenomena and also to foresee the most appropriate methods to ascertain the structure of porous materials MH - Argentina MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000175708800045 L2 - NITROGEN SORPTION MEASUREMENTS; POROUS SOLIDS; SIMULATION; ADSORPTION; GLASSES; MODEL SO - Physical Chemistry Chemical Physics 2002 ;4(11):2346-2355 6651 UI - 11567 AU - Rojas G AU - Almagro JC AU - Acevedo B AU - Gavilondo JV AD - Ctr Genet Engn & Biotechnol, Div Pharmaceut, Recombinant Antibodies Lab, Havana 10600, CubaUNAM, Inst Biotechnol, Cuernavaca, Morelos, MexicoRojas, G, Ctr Genet Engn & Biotechnol, Div Pharmaceut, Recombinant Antibodies Lab, POB 6162,Ave 31 E-158 & 190, Havana 10600, Cuba TI - Phage antibody fragments library combining a single human light chain variable region with immune mouse heavy chain variable regions AB - We describe the construction of a phage antibody fragments library which combines, in a single cloning step, a synthetic human light chain variable region (V-L) with a diverse set of heavy chain variable regions, from a mouse immunized with the prostate specific antigen (PSA). Despite V-L restriction, selection from this library rendered two different single chain Fv antibody fragments, specifically recognizing PSA. The human V-L, used as a general partner for mouse heavy chains, was constructed by linking the germline A27 gene and the J(K)1 minigene segment, both of which are prominently involved in human antibody responses. Our approach offers a fast and simple way to produce half-human molecules, while keeping the advantage of immunizing animals for high affinity antibodies. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0168-1656 UR - ISI:000174565900008 L2 - phage display;antibody library;single chain Fv;PSA;V-GENE LIBRARIES; MONOCLONAL-ANTIBODIES; DISPLAY APPROACH; REPERTOIRES; SEGMENTS; HUMANIZATION; GENERATION; EVOLUTION; BINDING; CLONING SO - Journal of Biotechnology 2002 ;94(3):287-298 6652 UI - 11227 AU - Rojas M AU - Ascencio F AU - Conway PL AD - Univ Autonoma Baja California, La Paz 23000, Baja California, MexicoCtr Invest Biol Baja Calif, La Paz 23000, Baja California, MexicoUniv Gothenburg, Dept Gen & Marine Microbiol, S-412390 Gothenburg, SwedenUniv New S Wales, Sch Microbiol & Immunol, CRC, Sydney, NSW 2052, AustraliaRojas, M, Univ Autonoma Baja California, Apdo Postal 19-B, La Paz 23000, Baja California, Mexico TI - Purification and characterization of a surface protein from Lactobacillus fermentum 104R that binds to porcine small intestinal mucus and gastric mucin AB - An adhesion-promoting protein involved in the binding of Lactobacillus fermentum strain 104R to small intestinal mucus from piglets and to partially purified gastric mucin was isolated and characterized. Spent culture supernatant fluid and bacterial cell wall extracts were fractionated by ammonium sulfate precipitation and gel filtration. The active fraction was purified by affinity chromatography. The adhesion-promoting protein was detected in the fractions by adhesion inhibition and dot blot assays and visualized by polyacrylamide gel electrophoresis (PAGE), sodium dodecyl sulfate-PAGE, and Western blotting with horseradish peroxidase-labeled mucus and mucin. The active fraction was characterized by estimating the relative molecular weight and by assessing the presence of carbohydrates in, and heat sensitivity of, the active region of the adhesion-promoting protein. The purified protein was digested with porcine trypsin, and the peptides were purified in a SMART system. The peptides were tested for adhesion to horseradish peroxidase-labeled mucin by using the dot blot adhesion assay. Peptides which bound mucin were sequenced. It was shown that the purified adhesion-promoting protein on the cell surface of L. fermentum 104R is extractable with 1 M LiCl and low concentrations of lysozyme but not with 0.2 M glycine. The protein could be released to the culture supernatant fluid after 24 h of growth and had affinity for both small intestinal mucus and gastric mucin. In the native state this protein was variable in size, and it had a molecular mass of 29 kDa when denatured. The denatured protein did not contain carbohydrate moieties and was not heat sensitive. Alignment of amino acids of the adhering peptides with sequences deposited in the EMBL data library showed poor homology with previously published sequences. The protein represents an important molecule for development of probiotics MH - Australia MH - Mexico|Baja California MH - Sweden PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 27 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000175407300030 L2 - ESCHERICHIA-COLI STRAINS; LACTIC-ACID BACTERIA; S-LAYER PROTEIN; EPITHELIAL-CELLS; CHEMICAL CHARACTERIZATION; MEDIATED ADHESION; ILEAL MUCUS; ADHERENCE; ACIDOPHILUS; GLYCOPROTEINS SO - Applied and Environmental Microbiology 2002 ;68(5):2330-2336 6653 UI - 12063 AU - Roldan FJ AU - Vargas-Barron J AU - Espinola-Zavaleta N AU - Romero-Cardenas A AU - Vazquez-Antona C AD - Inst Nacl Cardiol Ignacio Chavez, Dept Echocardiog, Mexico City 14080, DF, MexicoUniv Texas, Hlth Sci Ctr, Div Cardiol, San Antonio, TX, USARoldan, FJ, Inst Nacl Cardiol Ignacio Chavez, Dept Echocardiog, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Three-dimensional echocardiography of the right atrial embryonic remnants AB - Three-dimensional (3-D) transesophageal echocardiography had a better anatomic and functional correlation with matched embryonic remnant specimens of the right sinus valve (i.e., crista terminalis, Eustachian valve, Thebesian valve, and cor triatriatum dexter) than with the corresponding 2-D images alone. When the 3-D images were played in real time, there was a better spatial appreciation of the surrounding structures, providing a more "realistic" conceptualization of the cardiac anatomy, particularly with structures located at different tomographic planes MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000173168900026 L2 - RIGHT-HEART; NETWORK; VALVE SO - American Journal of Cardiology 2002 ;89(1):99-+ 6654 UI - 11087 AU - Romero-Fuster MD AU - Sanchez-Bringas F AD - Univ Valencia, Dept Geometria & Topol, E-46100 Burjassot, Valencia, SpainNatl Autonomous Univ Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, Mexico TI - Umbilicity of surfaces with orthogonal asymptotic lines in R-4 AB - We study some properties of surfaces in 4-space all whose points are umbilic with respect to some normal field. In particular, we show that this condition is equivalent to the orthogonality of the (globally defined) fields of asymptotic directions. We also analyze necessary and sufficient conditions for the hypersphericity of surfaces in 4-space. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0926-2245 UR - ISI:000175815700002 L2 - asymptotic direction;nu-principal curvature foliation;umbilicity;sphericity SO - Differential Geometry and Its Applications 2002 ;16(3):213-224 6655 UI - 9882 AU - Romero AH AU - Sebastiani D AU - Ramirez R AU - Kiwi M AD - Pontificia Univ Catolica Chile, Fac Fis, Santiago 6904411, ChileIPICyT, Adv Mat Dept, San Luis Potosi 78231, MexicoMax Planck Inst Polymer Res, D-55128 Mainz, GermanyRomero, AH, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 6904411, Chile TI - Is NMR the tool to characterize the structure of C-20 isomers? AB - We investigate the feasibility of using nuclear magnetic resonance (NMR) chemical shift calculations as a tool to provide structural information for C-20 fullerene type molecules. NMR chemical shifts are extremely sensitive to the local chemical environment of an atom, reflecting unambiguously its bond lengths and angles as well as its hybridization. Thus, they can distinguish between the different isomers that are candidates for the ground state of this molecule. We calculate the NMR shifts for several C-20 isomers and show that NMR constitutes a potential tool to discriminate and identify experimentally a particular C-20 molecular conformation, and also the level of theory which best describes the experimental structure. (C) 2002 Elsevier Science B.V. All rights reserved MH - Chile MH - Germany MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000179253000021 L2 - GRADIENT APPROXIMATION FUNCTIONALS; LOCALIZED QUANTITIES; CHEMICAL-SHIFTS; MAGNETIC-SUSCEPTIBILITIES; SMALLEST FULLERENE; CLUSTERS; CARBON; TERMS; C-60 SO - Chemical Physics Letters 2002 ;366(1-2):134-140 6656 UI - 10976 AU - Romero AL AU - West KL AU - Zern T AU - Fernandez ML AD - Univ Sonora, Dept Food Sci, Hermosillo, Sonora, MexicoUniv Connecticut, Dept Nutr Sci, Storrs, CT 06269, USARomero, AL, Univ Sonora, Dept Food Sci, Hermosillo, Sonora, Mexico TI - The seeds from Plantago ovata lower plasma lipids by altering hepatic and bile acid metabolism in guinea pigs AB - Psyllium, the husks from Plantago ovata (PO), is recognized as a potent agent in lowering plasma cholesterol. In this study, we tested the potential hypolipidemic effects of the seeds from PO and the mechanisms associated with the lowering of plasma lipids. Male Hartley guinea pigs (n = 30; 10 per group) were fed either a control diet or diets containing 7.5 or 10 g/100 g PO for 4 wk. Diets were identical in composition except for the fiber source. The control diet contained 10 g/100 g cellulose and 2.5 g/100 g guar gum, whereas the PO diets were adjusted to a total of 12.5 g/100 g fiber with cellulose. Although a dose response was not observed, plasma triglycericles and LDL cholesterol were 34 and 23% lower in the PO groups compared with the control (P < 0.01). Lecithin cholesterol acyltransferase (LCAT) and cholesterol ester transfer protein (CETP) activities were significantly affected by the PO diets. The control group had 100 and 36% higher LCAT and CETP (P < 0.01) activities, respectively, compared with the PO groups. Hepatic total and free cholesterol concentrations were not affected by PO, but cholesteryl ester concentrations were 50% (P < 0.01) lower in the PO groups compared with the control. The activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase, the rate-limiting enzyme of cholesterol synthesis was up-regulated in the PO groups by 37%. Similarly, the activity of cholesterol 7alpha-hydroxylase, the regulatory enzyme of cholesterol catabolism to bile acids was 33% higher in the PO groups (P < 0.02). Fecal bile acids were 3 times higher in the PO groups than in the control group. These results suggest that PO exerts its hypolipidemic effect by affecting bile acid absorption and altering hepatic cholesterol metabolism MH - Mexico|Sonora MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 15 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000176033300017 L2 - Plantago ovata;bile acids;plasma triglycerides;plasma cholesterol;guinea pigs;HUMAN CHOLESTEROL 7-ALPHA-HYDROXYLASE; DIETARY SOLUBLE FIBER; LDL-CHOLESTEROL; SERUM-CHOLESTEROL; ENZYMATIC DETERMINATION; CARDIOVASCULAR-DISEASE; APOLIPOPROTEIN-B; NORTHERN MEXICO; GUAR-GUM; PSYLLIUM SO - Journal of Nutrition 2002 ;132(6):1194-1198 6657 UI - 9538 AU - Romero J AU - Garcia-Varela M AU - Laclette JP AU - Espejo RT AD - Univ Chile, Inst Nutr & Tecnol Alimentos, Lab Bioingn, Santiago 11, ChileUniv Nacl Autonoma Mexico, Dept Inmunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoRomero, J, Univ Chile, Inst Nutr & Tecnol Alimentos, Lab Bioingn, Santiago 11, Chile TI - Bacterial 16S rRNA gene analysis revealed that bacteria related to Arcobacter spp. constitute an abundant and common component of the oyster microbiota (Tiostrea chilensis) AB - To explore the bacterial microbiota in Chilean oyster (Tiostrea chilensis), a molecular approach that permits detection of different bacteria, independently of their capacity to grow in culture media, was used. Bacterial diversity was assessed by analysis of both the 16S rDNA and the 16S-23S intergenic region, obtained by PCR amplifications of DNA extracted from depurated oysters. RFLP of the PCR amplified 16S rDNA showed a prevailing pattern in most of the individuals analyzed, indicating that a few bacterial species were relatively abundant and common in oysters. Cloning and sequencing of the 16S rDNA with the prevailing RFLP pattern indicated that this rRNA was most closely related to Arcobacter spp. However, analysis by the size of the amplified 16S-23S rRNA intergenic regions revealed not Arcobacter spp. but Staphylococcus spp. related bacteria as a major and common component in oyster. These different results may be caused by the absence of target for one of the primers employed for amplification of the intergenic region. Neither of the two bacteria species found in large abundance was recovered after culturing under aerobic, anaerobic, or microaerophilic conditions. This result, however, is expected because the number of bacteria recovered after cultivation was less than 0.01% of the total. All together, these observations suggest that Arcobacter-related strains are probably abundant and common in the Chilean oyster bacterial microbiota MH - Chile MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Ecology;Marine & Freshwater Biology;Microbiology U5 - J;Article AV - English IS - 0095-3628 UR - ISI:000179873500008 L2 - CAMPYLOBACTER-JEJUNI; SP-NOV; SAMPLES; IDENTIFICATION; COMMUNITY; SEDIMENTS; SEQUENCE SO - Microbial Ecology 2002 ;44(4):365-371 6658 UI - 10945 AU - Romero JA AU - Rakheja S AU - Ahmed AKW AU - Lozano A AD - Mexican Transport Inst, Mexico City, DF, MexicoQueretaro Autonomous Univ, Mexico City, DF, MexicoConcordia Univ, CONCAVE Res Ctr, Dept Engn Mech, Montreal, PQ H3G 1M8, CanadaRomero, JA, Mexican Transport Inst, Mexico City, DF, Mexico TI - Restrained cargo dynamics in road transportation: indirect tiedowns AB - A simple model is proposed to study the load-securement properties of indirect tiedowns under a longitudinal deceleration. The elasticity of the tiedown is expressed by an equivalent stiffness as a function of the material properties, tiedown angle, initial tension and cargo geometry. The equivalent stiffness is observed to be a strongly nonlinear function of cargo displacement and tiedown angle. The model further incorporates the effects of load-deck interface friction and vertical trailer vibration. The dynamic response characteristics of the restrained cargo are evaluated in terms of peak cargo motion and peak tiedown force under a longitudinal deceleration. The model is utilized to study the effects of tiedown materials, tiedown angle, cargo-deck friction and nature of vertical vibration (frequency, amplitude and phase). The results of the analysis revealed the strong influence of cargo-deck friction, vibration amplitude, tiedown material and tiedown angle on the potential cargo movement. The initial tension is also found to influence the effectiveness of the restraints MH - Canada MH - Mexico|Distrito Federal PB - GENEVA AEROPORT: INDERSCIENCE ENTERPRISES LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Mechanical;Transportation Science & Technology U5 - J;Article AV - English IS - 1351-7848 UR - ISI:000176211800001 L2 - cargo dynamics;cargo restraint;heavy vehicles;indirect tiedowns;road transport SO - Heavy Vehicle Systems-International Journal of Vehicle Design 2002 ;9(2):93-114 6659 UI - 11895 AU - Romero JJ AU - Jaque D AU - Ramos-Lara F AU - Boulon G AU - Guyot Y AU - Caldino U AU - Sole JG AD - Univ Autonoma Madrid, Dept Fis Mat C IV, E-28049 Madrid, SpainUniv Complutense Madrid, Fac Ciencias Fis, Dept Fis Mat, E-28040 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Lyon 1, Lab Physicochim Mat Luminescents, CNRS, UMR 5620, F-69629 Villeurbanne, FranceRomero, JJ, Univ Autonoma Madrid, Dept Fis Mat C IV, E-28049 Madrid, Spain TI - Stimulated emission, excited state absorption, and laser modeling of the Nd3+: Ca3Ga2Ge3O12 laser system AB - We report on a full spectroscopic characterization of the Nd3+ ion doped Ca3Ga2Ge3O12 garnet laser host for different ion concentrations ranging from 2.5x10(-2) up to 2 at. %. The Judd-Ofelt formalism has been applied, from which the stimulated emission cross section corresponding to the F-4(3/2)-->I-4(11/2) laser channel has been determined. Excited state absorption cross section in the 1020-1090 nm region has been measured by using two beam spectroscopy, demonstrating that the 1060 and 1065 nm laser emissions are not affected by excited state absorptions. Finally, once the basic parameters are known, we have applied the mode overlap formalism in order to determine the Nd3+ concentration and crystal length which optimize the laser performance of an end diode pumped laser system. We have concluded that the maximum output power is reached when the Nd3+ concentration and crystal length are around 0.75 at. % and 0.6 mm, respectively (C) 2002 American Institute of Physics MH - France MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000173553800002 L2 - CRYSTAL; ND3+; GARNET SO - Journal of Applied Physics 2002 ;91(4):1754-1760 6660 UI - 10089 AU - Romero MT AU - rbey-Rodriguez J AU - Takeuchi N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Ctr Invest Cientifica & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Nacl Colombia, Dept Phys, GFMC, Grp Fsica Mat Condensada, Bogota, ColombiaTakeuchi, N, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - S on Si(001): Adsorption of a single atom up to a full monolayer AB - We have studied the adsorption of S on the Si(001) c(4 x 2) surface by first principles total energy calculations. It is found that the first S atom is adsorbed on top of a symmetric Si dimer. Following atoms occupy similar bridge sites up to half-monolayer coverage. Increasing the amount of S atoms leads to the breaking of the underlying Si dimers. Our calculations predict that from 1/2 ML up to a full ML the growth of S is highly anisotropic. There is a preference of the S atoms to grow along the Si dimers rows. At full monolayer, all the Si dimers are broken and the surface is completely de-reconstructed with all Si atoms near bulk ideal positions MH - Colombia MH - Mexico|Baja California PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400041 L2 - SI(100) SURFACE; ELEMENTAL S; GE(001); RESTORATION; AL; RECONSTRUCTIONS; TELLURIUM; DYNAMICS; INDIUM; GROWTH SO - Surface Review and Letters 2002 ;9(5-6):1815-1819 6661 UI - 10365 AU - Romieu I AU - Sienra-Monge JJ AU - Ramirez-Aguilar M AU - Tellez-Rojo MM AU - Moreno-Macias H AU - Reyes-Ruiz NI AU - Del Rio-Navarro BE AU - Ruiz-Navarro MX AU - Hatch G AU - Slade R AU - Hernandez-Avila M AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoUS EPA, Durham, NC, USARomieu, I, Inst Nacl Salud Publ, 655 Avenida Univ,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Antioxidant supplementation and lung functions among children with asthma exposed to high levels of air pollutants AB - To evaluate whether acute effects of ozone, nitrogen dioxide, and particulates with mass median diameter less than 10 mum could be attenuated by antioxidant vitamin supplementation, we conducted a randomized trial using a double-blinded design. Children with asthma (n = 158) who were residents of Mexico City were randomly given a daily supplement of vitamins (50 mg/day of vitamin E and 250 mg/day of vitamin Q or a placebo and were followed from October 1998 to April 2000. Pulmonary function tests were carried out twice a week in the morning. During the follow-up observation period, the mean 1-hour maximum ozone level was 102 ppb (SD = 47), and the mean 24-hour average PM10 level was 56.7 mug/m(3) (SD = 27.4). In children with moderate and severe asthma, ozone levels 1 day before spirometry were inversely associated significantly with forced expiratory flow (FEF25-75) (-13.32 ml/ second/10 ppb; p = 0.000), FEV1 (-4.59 ml/10 ppb; p = 0.036), and peak expiratory flow (PEF) (-15.01 ml/second/10 ppb; p = 0.04) in the placebo group after adjusting for potential confounding factors. No association between ozone and lung functions was observed in the supplement group. We observed significant differences in lung function decrements between groups for FEF25-75 and PEF. Our results suggest that supplementation with antioxidants might modulate the impact of ozone exposure on the small airways of children with moderate to severe asthma MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 74 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000177734100017 L2 - childhood asthma;antioxidants;air pollution;Mexico;OZONE EXPOSURE; VITAMIN-E; LIPID-PEROXIDATION; PULMONARY-FUNCTION; ALPHA-TOCOPHEROL; RHESUS-MONKEYS; ASCORBIC-ACID; MILD ASTHMA; MEXICO-CITY; GLUTATHIONE SO - American Journal of Respiratory and Critical Care Medicine 2002 ;166(5):703-709 6662 UI - 10684 AU - Romieu I AU - Samet JM AU - Smith KR AU - Bruce N AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoJohns Hopkins Univ, Dept Epidemiol, Bloomberg Sch Publ Hlth, Baltimore, MD, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Liverpool, Dept Publ Hlth, Liverpool L69 3BX, Merseyside, EnglandRomieu, I, Inst Nacl Salud Publ, 655 Ave Univ,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Outdoor air pollution and acute respiratory infections among children in developing countries AB - Acute respiratory infections (ARIs) are the most common cause of illness and death in children in the developing world. This review focuses on outdoor air pollutants associated with pediatric ARI mortality and morbidity. Studies were identified using MEDLINE and other electronic databases. Four studies showed an increase in infant mortality in relation to outdoor air pollution. Short-term follow-up and time-series studies suggest that air pollutants act as risk factors for respiratory infection. Air pollution exposure increases the incidence of upper- and lower-respiratory infections in children. Because complex pollution mixtures are Present in the studied urban areas, pollutant levels at which ARI risk would be expected to increase cannot be determined. Children may be at greater risk, given the poor environmental and nutritional conditions prevalent in developing countries MH - United Kingdom MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 21 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1076-2752 UR - ISI:000176845300009 L2 - TIME-SERIES ANALYSIS; MEXICO-CITY; INFANT-MORTALITY; MEDICAL VISITS; LATIN-AMERICA; SAO-PAULO; HEALTH; EPIDEMIOLOGY; DISEASES; BRAZIL SO - Journal of Occupational and Environmental Medicine 2002 ;44(7):640-649 6663 UI - 9905 AU - Romo R AU - Hernandez A AU - Zainos A AU - Lemus L AU - Brody CD AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoCold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USARomo, R, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Apartado Postal 70-253, Mexico City 04510, DF, Mexico TI - Neuronal correlates of decision-making in secondary somatosensory cortex AB - The ability to discriminate between two sequential stimuli requires evaluation of current sensory information in reference to stored information. Where and how does this evaluation occur? We trained monkeys to compare two mechanical vibrations applied sequentially to the fingertips and to report which of the two had the higher frequency. We recorded single neurons in secondary somatosensory cortex (S2) while the monkeys performed the task. During the first stimulus period, the firing rate of S2 neurons encoded the stimulus frequency. During the second stimulus period, however, some S2 neurons did not merely encode the stimulus frequency. The responses of these neurons were a function of both the remembered (first) and current (second) stimulus. Moreover, a few hundred milliseconds after the presentation of the second stimulus, these responses were correlated with the monkey's decision. This suggests that some S2 neurons may combine past and present sensory information for decision-making MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NATURE AMERICA INC RP - NOT IN FILE U3 - TC 55 U4 - Neurosciences U5 - J;Article AV - English IS - 1097-6256 UR - ISI:000178884600026 L2 - POSTERIOR PARIETAL CORTEX; PREFRONTAL CORTEX; CORTICOCORTICAL CONNECTIONS; PSYCHOPHYSICAL MEASUREMENTS; CORTICAL MICROSTIMULATION; SENSORY DISCRIMINATION; VISUAL RESPONSES; MACAQUE MONKEY; RHESUS-MONKEY; AREAS SO - Nature Neuroscience 2002 ;5(11):1217-1225 6664 UI - 11035 AU - Roncagliolo M AU - Fuenzalida M AU - Bonansco C AU - Diaz I AU - Morales BE AU - Eguibar JR AD - Univ Valparaiso, Dept Physiol, Fac Sci, Valparaiso, ChileBUAP, Inst Physiol, Puebla, Mexico TI - Myelin mutant taiep rat show an alteration in the spinal cord (SC) monosynaptic responses MH - Chile MH - Mexico|Puebla PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences U5 - J;Meeting Abstract AV - English IS - 0894-1491 UR - ISI:000175586100158 SO - Glia 2002 ;():S36-S36 6665 UI - 10764 AU - Ronco A AU - Gagnon P AU - az-Baez MC AU - Arkhipchuk V AU - Castillo G AU - Castillo LE AU - Dutka BJ AU - Pica-Granados Y AU - Ridal J AU - Srivastava RC AU - Sanchez A AD - Natl Univ La Plata, Fac Sci, RA-1900 La Plata, ArgentinaEnvironm Canada, St Lawrence Ctr, Montreal, PQ, CanadaNatl Univ Colombia, Fac Engn, Bogota, ColombiaUkrainian Acad Sci, Inst Colloid Chem & Water Chem, Kiev, UkraineUniv Chile, Dept Civil Engn, Santiago, ChileNatl Univ, Cent Amer Inst Studies Toxic Substances, Heredia, Costa RicaEnvironm Canada, Natl Water Res Inst, Burlington, ON L7R 4A6, CanadaMexican Inst Water Technol, Cuernavaca, Morelos, MexicoSt Lawrence River Inst Environm Sci, Cornwall, ON, CanadaAll India Inst Hyg & Publ Hlth, Calcutta, W Bengal, IndiaInt Dev Res Ctr, Ottawa, ON, CanadaRonco, A, Natl Univ La Plata, Fac Ciencias Exactas, Dept Quim, Ctr Invest Medio Ambiente, 47 & 115, RA-1900 La Plata, Argentina TI - Overview of results from the WaterTox intercalibration and environmental testing phase II program: Part 1, statistical analysis of blind sample testing AB - There is an urgent need to evaluate the presence of toxicants in waters used for human consumption and to develop strategies to reduce and prevent their contamination. The International Development Research Centre undertook an intercalibration project to develop and validate a battery of bioassays for toxicity testing of water samples. The project was carried out in two phases by research institutions from eight countries that formed the WaterTox network. Results for the first phase were reported in the special September 2000 issue of Environmental Toxicology, Phase 11 involved toxicity screening tests of environmental and blind samples (chemical solutions of unknown composition to participating laboratories) using the following battery: Daphnia magna, Hydra attenuata, seed root inhibition with Lactuca sativa, and Selenastrum capricornutum. This battery was also used to assess potential toxicity in concentrated (10 X) water samples. Results are presented for a set of six blind samples sent to the participating laboratories over a 1-year period. Analyses were performed for each bioassay to evaluate variations among laboratories of responses to negative controls, violations of test quality control criteria, false positive responses induced by sample concentration, and variability within and between labs of responses to toxic samples. Analyses of the data from all bioassays and labs provided comparisons of false positive rates (based on blind negative samples), test sensitivities to a metal or organic toxicant, and interlaboratory test variability. Results indicate that the battery was reliable in detecting toxicity when present. However, some false positives were identified with a concentrated soft-water sample and with the Lactuca and Hydra (sublethal end-point) tests. Probabilities of detecting false positives for individual and combined toxic responses of the four bioassays are presented. Overall, interlaboratory comparisons indicate a good reliability of the battery. (C) 2002 Wiley Periodicals, Inc MH - Argentina MH - Canada MH - Chile MH - Colombia MH - Costa Rica MH - India MH - Mexico|Morelos MH - Ukraine PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Toxicology;Water Resources U5 - J;Article AV - English IS - 1520-4081 UR - ISI:000176717400010 L2 - toxicity test battery;Daphnia;Hydra;Lactuca;Selenastrum capricornutum;intercalibration blind samples;quality controls;false positives;developing countries;ACUTE TOXICITY; ASSAY SO - Environmental Toxicology 2002 ;17(3):232-240 6666 UI - 11157 AU - Rosa-Gonzalez D AU - Terlevich E AU - Terlevich R AD - INAOE, Puebla 72840, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandTerlevich, E, INAOE, Luis Enrique Erro 1 Tonantzintla, Puebla 72840, Mexico TI - An empirical calibration of star formation rate estimators AB - The observational determination of the behaviour of the star formation rate (SFR) with look-back time or redshift has two main weaknesses: (i) the large uncertainty of the dust/extinction corrections, and (ii) that systematic errors may be introduced by the fact that the SFR is estimated using different methods at different redshifts. Most frequently, the luminosity of the Halpha emission line, that of the forbidden line [O ii] lambda 3727 and that of the far-ultraviolet continuum are used with low-, intermediate- and high-redshift galaxies, respectively. To assess the possible systematic differences among the different SFR estimators and the role of dust, we have compared SFR estimates using Halpha , [O ii] lambda 3727 Angstrom, ultraviolet (UV) and far-infrared (FIR) luminosities [SFR (Halpha ), SFR (O ii), SFR (UV) and SFR (FIR), respectively] of a sample comprising the 31 nearby star-forming galaxies that have high-quality photometric data in the UV, optical and FIR. We review the different 'standard' methods for the estimation of the SFR and find that while the standard method provides good agreement between SFR (Halpha ) and SFR (FIR), both SFR (O ii) and SFR (UV) are systematically higher than SFR (FIR), irrespective of the extinction law. We show that the excess in the SFR (O ii) and SFR (UV) is mainly due to an overestimation of the extinction resulting from the effect of underlying stellar Balmer absorptions in the measured emission line fluxes. Taking this effect into consideration in the determination of the extinction brings the SFR (O ii) and SFR (UV) in line with the SFR (FIR), and simultaneously reduces the internal scatter of the SFR estimations. Based on these results, we have derived 'unbiased' SFR expressions for the SFR (UV), SFR (O ii) and SFR (Halpha ). We have used these estimators to recompute the SFR history of the Universe using the results of published surveys. The main results are that the use of the unbiased SFR estimators brings into agreement the results of all surveys. Particularly important is the agreement achieved for the SFR derived from the FIR/millimetre and optical/UV surveys. The 'unbiased' star formation history of the Universe shows a steep rise in the SFR from z=0 to z =1 with SFR proportional to(1+z )(4.5), followed by a decline for z >2 where SFR proportional to(1+z )(-1.5). Galaxy formation models tend to have a much flatter slope from z = 0 to z =1 MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 47 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000175536700003 L2 - stars : formation;HII regions;galaxies : evolution;HUBBLE DEEP FIELD; ULTRAVIOLET LUMINOSITY DENSITY; HIGH-REDSHIFT GALAXIES; FORMING GALAXIES; FORMATION HISTORY; STARBURST GALAXIES; SPACE-TELESCOPE; ALPHA EMISSION; LY-ALPHA; ABSORPTION SO - Monthly Notices of the Royal Astronomical Society 2002 ;332(2):283-295 6667 UI - 9592 AU - Rosales JJ AU - Tkach VI AU - Torres J AD - Univ Gto, Fac Ingn Mecan Elect & Elect, Salamanca 36730, Gto, SpainUniv Guanajuato, Inst Fis, Leon 05315970, Gto, MexicoRosales, JJ, Univ Gto, Fac Ingn Mecan Elect & Elect, Av Tampico 912,Apdo Postal 215-A, Salamanca 36730, Gto, Spain TI - Extended supersymmetry for the Bianchi-type cosmological models AB - In this paper we propose a superfield description for all Bianchi-type cosmological models. The action is invariant under world-line local n = 4 supersymmetry with SU(2)(local) x SU(2)(global) internal symmetry. Due to the invariance of the action we obtain the constraints, which form a closed superalgebra of the n = 4 supersymmetric quantum mechanics. This procedure provides the inclusion of supermatter in a systematic way MH - Mexico|Guanajuato MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000179800600006 L2 - supersymmetry;cosmology;QUANTUM COSMOLOGY; FRW MODEL; SUPERGRAVITY; BREAKING; MECHANICS; FORMULATION SO - Modern Physics Letters A 2002 ;17(33):2199-2207 6668 UI - 9480 AU - Rosas-Sandoval G AU - Ambrogelly A AU - Rinehart J AU - Wei D AU - Cruz-Vera LR AU - Graham DE AU - Stetter KO AU - Guarneros G AU - Soll D AD - Yale Univ, Dept Mol Biophys, New Haven, CT 06520, USAYale Univ, Dept Biochem, New Haven, CT 06520, USAYale Univ, Dept Chem, New Haven, CT 06520, USACtr Invest & Estudios Avanzados, Inst Politecn Nacl, Dept Genet & Biol Mol, Mexico City 7000, DF, MexicoVirginia Polytech Inst & State Univ, Dept Biochem, Blacksburg, VA 24061, USAUniv Regensburg, Lehrstuhl Mikrobiol, D-8400 Regensburg, GermanyUniv Regensburg, Archaeenzentrum, D-8400 Regensburg, GermanySoll, D, Yale Univ, Dept Mol Biophys, New Haven, CT 06520, USA TI - Orthologs of a novel archaeal and of the bacterial peptidyl-tRNA hydrolase are nonessential in yeast AB - Peptidyl-tRNA hydrolase (encoded by pth) is an essential enzyme in all bacteria, where it releases tRNA from the premature translation termination product peptidyl-tRNA. Archaeal genomes lack a recognizable peptidyl-tRNA hydrolase (Pth) ortholog, although it is present in most eukaryotes. However, we detected Pth-like activity in extracts of the archaeon Methanocaldococcus jannaschii. The uncharacterized MJ0051 ORF was shown to correspond to a protein with Pth activity. Heterologously expressed MJ0051 enzyme catalyzed in vitro the cleavage of the Pth substrates diacetyl[C-14]lysyl-tRNA and acetyl-[C-14]phenylalanyl-tRNA. On transformation of an Escherichia coli pth(ts) mutant, the MJ0051 gene (named pth2) rescued the temperature-sensitive phenotype of the strain. Analysis of known genomes revealed the presence of highly conserved orthologs of the archaeal pth2 gene in all archaea and eukaryotes but not in bacteria. The phylogeny of pth2 homologs suggests that the gene has been vertically inherited throughout the archaeal and eukaryal domains. Deletions in Saccharomyces cerevisiae of the pth2 (YBL057c) or pth (YHR189w) orthologs were viable, as was the double deletion strain, implying that the canonical Pth and Pth2 enzymes are not essential for yeast viability MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 18 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000180101600038 L2 - TRANSFER-RNA HYDROLASE; ESCHERICHIA-COLI; PROTEIN-SYNTHESIS; SACCHAROMYCES-CEREVISIAE; GENE; IDENTIFICATION; ACCUMULATION; DEGRADATION; SENSITIVITY; EXPRESSION SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(26):16707-16712 6669 UI - 11894 AU - Rosas C AU - Cuzon G AU - Gaxiola G AU - Pascual C AU - Taboada G AU - Arena L AU - van Wormhoudt A AD - UNAM, Fac Ciencias, Grp Biol Marina Expt, Campeche, MexicoIFREMER, Ctr Oceanol Pacific, Taravao, Tahiti, Fr PolynesiaMuseum Natl Hist Nat, Biol Stn, F-29900 Concarneau, FranceColl France, F-29900 Concarneau, FranceRosas, C, UNAM, Fac Ciencias, Grp Biol Marina Expt, Apdo Post 69,Cd Carmen, Campeche, Mexico TI - An energetic and conceptual model of the physiological role of dietary carbohydrates and salinity on Litopenaeus vannamei juveniles AB - We are reporting results directed to explain the relation between carbohydrates (CHO), protein metabolism, and the energetic balance of Litopenaeus vannamei juveniles. The interaction of dietary CHO and salinity was measured to try to understand the relation between osmotic control and metabolism, both from a biochemical and energetic point of view. Two experiments were done. In the first experiment, shrimp were fed with 0%, 5%, 33%, and 61% CHO and maintained at 15% and 40% salinity. Glucose, lactate protein, hemocyanin, ammonia concentration, and osmotic pressure were measured in blood. Digestive gland glycogen (DGG) was measured also. In the second experiment, shrimp were fed with 0% and 38% dietary CHO and maintained at 15% and 40% salinity. From that shrimp, absorbed energy (Abs) was calculated as: Abs=respiration (R)+ammonia excretion (U) and production (P); assimilated energy (As) was calculated as the product of R x P. Osmotic pressure, hemocyanin, protein, lactate, and blood ammonia increased with the reduction in dietary CHO. In contrast, an increase in blood glucose was observed with an increase in dietary CHO. Digestive gland glycogen (DGG) increased following a saturation curve with a DGG maximum at 33% dietary CHO. Blood metabolites of fasting and feeding shrimp showed the same behavior. Energy balance results showed that shrimp maintained in low salinity and fed without CHO waste more energy in U production than for shrimp maintained in high salinity and fed with high CHO levels. Notwithstanding, the production efficiency was higher in shrimp fed without CHO than that observed in shrimp fed with high CHO independent of salinity. A scheme trying to integrate the relation between CHO and protein metabolism and the way in which both are modulated by salinity is presented. From published and present results, there are two factors that apparently control the use of high dietary CHO levels; alpha-amylase enzyme-dietary CHO level capacity and glycogen saturation in DG. Production of glucose is limited in shrimp because of saturation of alpha-amylase when shrimp are fed with diets above 33% CHO. This is the first control point of starch metabolism. The digestive gland is saturated with glycogen in shrimp fed with dietary CHO levels >33%. This is apparently the second control point of CHO metabolism that limits growth rate in such conditions. The high metabolic cost related to high CHO diets could explain why shrimp are well adapted to use protein as a source of energy. (C) 2002 Elsevier Science B.V. All rights reserved MH - Fr Polynesia MH - France MH - Mexico|Campeche PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000173572600004 L2 - carbohydrate metabolism;salinity;Litopenaeus vannamei hemolymph proteins;oxygen consumption;ammonia excretion;internal ammonia;PENAEUS-MONODON; PROTEIN-LEVELS; METABOLISM; HEMOLYMPH; REQUIREMENTS; STYLIROSTRIS; HEMOCYANIN; CRUSTACEA; DECAPODA; SURVIVAL SO - Journal of Experimental Marine Biology and Ecology 2002 ;268(1):47-67 6670 UI - 9428 AU - Rosas G AU - Fragoso G AU - Garate T AU - Hernandez B AU - Ferrero P AU - Foster-Cuevas M AU - Parkhouse RME AU - Harrison LJS AU - Briones SL AU - Gonzalez LM AU - Sciutto E AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Autonoma Estado Morelos, Fac Med, Unidad Biomed Mol, Cuernavaca 62210, Morelos, MexicoCtr Nacl Microbiol Virol & Inmunol Sanitarias Maja, Minist Sanidad & Consumo, Inst Salud Carlos III, Madrid, SpainUniv Nacl Autonoma Mexico, Fac Med, Mexico City, DF, MexicoPirbright Labs, Inst Anim Hlth, Woking GU24 0NF, Surrey, EnglandInst Gulbenkian Ciencias, P-2780156 Oeiras, PortugalUniv Edinburgh, Easter Bush Veterinary Ctr, Dept Trop Anim Hlth,Royal Dick Sch Vet Studies, Sir Alexander Robertson Ctr Trop Vet Med, Roslin EH25 9RG, Midlothian, ScotlandSciutto, E, Univ Nacl Autonoma Mexico, Inst Invest Biomed, AP 70228, Mexico City 04510, DF, Mexico TI - Protective immunity against Taenia crassiceps murine cysticercosis induced by DNA vaccination with a Taenia saginata tegument antigen AB - This study investigated the protective capacity of the recombinant Taenia saginata Tso18 antigen administered as a DNA vaccine in the Taenia crassiceps murine model of cysticercosis. This Tso18 DNA sequence, isolated from a T saginata oncosphere cDNA library, has homologies with Taenia solium and Echinococcus sp. It was cloned in the pcDNA3.1 plasmid and injected once intramuscularly into mice. Compared to saline-vaccinated control mice, immunization reduced the parasite burden by 57.3-81.4%, while lower levels of non-specific protection were induced in control mice injected with the plasmid pcDNA3.1 (18.8-33.1%) or a plasmid with irrelevant construct, pcDNA3.1/3D15 (33.4-38.8%). Importantly, significant levels of protection were observed between the pcDNA3.1/Tso18 plasmid and pcDNA3.1/3D15 plasmid immunized mice. Mice immunized with pTso18 synthesized low levels of, primarily IgG1 sub-class, antibodies.. These antibodies were shown to recognize a 66 kDa antigen fraction of T crassiceps and T solium: Splenocytes enriched in both CD4+CD8-and CD4-CD8+ T cells from these vaccinated mice proliferated in vitro when exposed to antigens from both T solium and T crassiceps cestodes. Immunolocalization studies revealed the Tso18 antigen in oncospheres of T saginata and T solium, in the adult tapeworm and in the tegument of T solium cysticerci. The protective capacity of this antigen and its extensive distribution in different stages, species and genera of cestodes points to the potential of Tso 18 antigen for the possible design of a vaccine against cestodes. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Portugal MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Microbiology;Virology U5 - J;Article AV - English IS - 1286-4579 UR - ISI:000180243900005 L2 - DNA immunization;vaccination;cysticercosis;Taenia solium;Taenia crassiceps;Taenia saginata;MAJOR SURFACE-ANTIGEN; ECHINOCOCCUS-MULTILOCULARIS; SOLIUM CYSTICERCOSIS; GENE; IMMUNIZATION; FAMILY; MOESIN; EZRIN; SUSCEPTIBILITY; GRANULOSUS SO - Microbes and Infection 2002 ;4(14):1417-1426 6671 UI - 9992 AU - Rosete-Aguilar M AU - Rayces JL AD - Univ Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoRayces Consulting Inc, Tucson, AZ 85718, USARosete-Aguilar, M, Univ Nacl Autonoma Mexico, Ctr Instrumentos, Mexico City 04510, DF, Mexico TI - Eye rotation and vignetting in visual instruments AB - The eye can rotate to accommodate the angular position of an object and the distance of the object from it. The rotation of the eye inside its socket to align its visual axis in the direction of an off-axis image may introduce full or partial vignetting when one is looking through a visual instrument with a real exit pupil. We analyze the effects of vignetting owing to rotation of the eye in visual instruments with real exit pupils. (C) 2002 Optical Society of America MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000178847600008 SO - Applied Optics 2002 ;41(31):6593-6602 6672 UI - 10529 AU - Rosu HC AU - Planat M AD - IPICyT, Dept Math Appl, San Luis Potosi, MexicoCNRS, Lab Phys & Metrol Oscilateurs, F-25044 Besancon, FranceRosu, HC, IPICyT, Dept Math Appl, Apdo Postal 3-74 Tangamanga, San Luis Potosi, Mexico TI - On arithmetic detection of grey pulses with application to Hawking radiation AB - Micron-sized black holes do not necessarily have a constant horizon temperature distribution. The black hole remote-sensing problem means to find out the "surface" temperature distribution of a small black hole from the spectral measurement of its (Hawking) grey pulse. This problem has been previously considered by Rosu, who used Chen's modified Mobius inverse tran form. Here, we hint on a Ramanujan generalization of Chen's modified Mobius inverse transform that may be considered as a special wavelet processing of the remote-sensed grey signal coming from a black hole or any other distant grey source MH - France MH - Mexico|San Luis Potosi PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000177312600005 L2 - Mobius transform;Ramanujan sums;grey-body;Hawking radiation;black hole;THICK EINSTEIN SHELLS; BLACK-HOLES; ELEMENTARY-PARTICLES; SPECTROSCOPY; INVERSION; FORMULA; PHYSICS; MOBIUS SO - Modern Physics Letters A 2002 ;17(21):1377-1381 6673 UI - 9571 AU - Rothenberg SJ AU - Kondrashov V AU - Manalo M AU - Jiang J AU - Cuellar R AU - Garcia M AU - Reynoso B AU - Reyes S AU - Diaz M AU - Todd AC AD - Charles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USANatl Publ Hlth Inst, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoMt Sinai Sch Med, Dept Community & Prevent Med, New York, NY, USARothenberg, SJ, Charles R Drew Univ Med & Sci, Dept Anesthesiol, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Increases in hypertension and blood pressure during pregnancy with increased bone lead levels AB - Prior studies have revealed associations of current lead exposure (blood lead) and past lead exposure (bone lead) with risks of hypertension and elevated blood pressure. The authors examined the effects of blood and bone lead on hypertension and elevated blood pressure in the third trimester and postpartum among 1,006 women enrolled in Los Angeles prenatal care clinics between 1995 and 2001. The authors measured bone lead concentration by K-shell x-ray fluorescence in the tibia (mean = 8.0 mug/g (standard deviation (SD) 11.4)) and calcaneus (heel) (mean = 10.7 mug/g (SD 11.9)). Geometric mean, prenatal and postnatal blood lead levels were 1.9 mug/dl (geometric SID +3.6/-1.0) and 2.3 mug/dl (geometric SID +4.3/-1.2), respectively. For each 10-mug/g increase in calcaneus bone lead level, the odds ratio for third-trimester hypertension (systolic blood pressure greater than or equal to140 mmHg or diastolic blood pressure greater than or equal to90 mmHg) was 1.86 (95% confidence interval (Cl): 1.04, 3.32). In normotensive subjects, each 10-mug/g increase in calcaneus bone lead level was associated with a 0.70-mmHg (95% Cl: 0.04, 1.36) increase in third-trimester systolic blood pressure and a 0.54-mmHg (95% Cl: 0.01, 1.08) increase in diastolic blood pressure. Tibia bone lead concentration was not related to hypertension or elevated blood pressure either in the third trimester or postpartum, nor was calcaneus bone lead related to postpartum hypertension or elevated blood pressure. Past lead exposure influences hypertension and elevated blood pressure during pregnancy. Controlling blood pressure may require reduction of lead exposure long before pregnancy MH - USA MH - Mexico|Morelos PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 20 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000179930500001 L2 - blood;blood pressure;bone and bones;lead;pregnancy;CENTRAL LOS-ANGELES; FETAL GROWTH; NHANES-II; PREECLAMPSIA; WOMEN SO - American Journal of Epidemiology 2002 ;156(12):1079-1087 6674 UI - 11032 AU - Rothenberg SJ AU - Schnaas L AU - Salgado-Valladares M AU - Casanueva E AU - Geller AM AU - Hudnell HK AU - Fox DA AD - Univ Houston, Coll Optometry, Dept Biol & Biochem, Houston, TX 77204, USAUniv Houston, Coll Optometry, Dept Pharmacol, Houston, TX 77204, USAUniv Houston, Coll Optometry, Dept Pharmaceut Sci, Houston, TX 77204, USANatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoCharles R Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Perinatol, Mexico City, DF, MexicoUS EPA, Div Neurotoxicol, Res Triangle Pk, NC 27711, USAFox, DA, Univ Houston, Coll Optometry, Dept Biol & Biochem, 505 J Davis Armistead Bldg, Houston, TX 77204 USA TI - Increased ERG a- and b-wave amplitudes in 7- to 10-year-old children resulting from prenatal lead exposure AB - PURPOSE. To determine the dose-response relationship between blood lead concentration ([PbB]) and scotopic ERG amplitude in 7- to 10-year-old children with lifetime lead exposure. METHODS. Full-field flash scotopic ERGS were recorded over a 4-log-unit range in 45 dark-adapted children with normal visual acuity. [PbB] was measured throughout pregnancy and postnatal development, and the subjects' [PbB] levels were grouped at each age by tertiles. RESULTS. The median [PbB] during pregnancy was, from lowest to highest tertile, 2.5 to 5.0, 7.5 to 9.0, and 14.0 to 16.5 mug/dL, and after birth was 4.0 to 8.0, 6.0 to 14.5, and 7.5 to 21.0 mug/dL. Only maternal [PbB] at 12 weeks of pregnancy showed a significant dose-response relationship with the ERG measures, so that with increasing [PbB] there were significant increases in leading-edge a-wave amplitude, peak a-wave amplitude, and b-wave amplitude and sensitivity, with no changes in implicit times. Data analyses showed that children whose mothers had [PbB] of 10.5 mug/dl, or more at 12 weeks of pregnancy had relatively increased a- and b-waves. CONCLUSIONS. Lead exposure during the first trimester of pregnancy produces dose-dependent increases in scotopic a- and b-wave amplitudes in 7- to 10-year-old children. The results suggest that the increases in a- and b-wave amplitudes originate front rods; however, the increased b-wave amplitude and sensitivity may also originate in the inner retina. These alterations Occurred at maternal [PbB] at or below currently accepted safe levels. These novel findings reveal that the developing retina is a sensitive target for lead and suggest that lead-exposed children be examined for possible future visual system deficits MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BETHESDA: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 13 U4 - Ophthalmology U5 - J;Article AV - English IS - 0146-0404 UR - ISI:000175927800051 L2 - BLOOD LEAD; CONE DYSTROPHY; PHOSPHODIESTERASE INHIBITORS; RETINAL DEGENERATION; 6-YEAR-OLD CHILDREN; MERCURY LEVELS; SECULAR TREND; SCOTOPIC ERG; MEXICO-CITY; MONKEYS SO - Investigative Ophthalmology & Visual Science 2002 ;43(6):2036-2044 6675 UI - 10925 AU - Roux J AU - Wingfield MJ AU - Cibrian D AD - Univ Pretoria, FABI, TPCP, ZA-0002 Pretoria, South AfricaUniv Autonoma Chapingo, Chapingo 56230, MexicoRoux, J, Univ Pretoria, FABI, TPCP, ZA-0002 Pretoria, South Africa TI - First report of coniothyrium canker of Eucalyptus in Mexico MH - Mexico|Estado De Mexico MH - South Africa PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences U5 - J;Editorial Material AV - English IS - 0032-0862 UR - ISI:000175861700016 SO - Plant Pathology 2002 ;51(3):382-382 6676 UI - 9350 AU - Rowe GT AU - Kaegi MEC AU - Morse JW AU - Boland GS AU - Briones EGE AD - Texas A&M Univ, Dept Oceanog, College Stn, TX 77843, USADept Interior, Minerals Management Serv, New Orleans, LA 70123, USAUniv Nacl Autonoma Mexico, Inst Ciencias Mat & Limnol, Mexico City 04510, DF, MexicoRowe, GT, Texas A&M Univ, Dept Oceanog, College Stn, TX 77843, USA TI - Sediment community metabolism associated with continental shelf hypoxia, Northern Gulf of Mexico AB - Net fluxes of respiratory metabolites (O-2, dissolved inorganic carbon (DIC), NH4+, NO3-, and NO2-) across the sediment-water interface were measured using in-situ benthic incubation chambers in the area of intermittent seasonal hypoxia associated with the Mississippi River plume. Sulfate reduction was measured in sediments incubated with trace-levels of S-35-labeled sulfate. Heterotrophic remineralization, measured as nutrient regeneration, sediment community oxygen consumption (SOC), sulfate reduction, or DIC production, varied positively as a function of temperature. SOC was inversely related to oxygen concentration of the bottom water. The DIC fluxes were more than 2 times higher than SOC alone, under hypoxic conditions, suggesting that oxygen uptake alone cannot be used to estimate total community remineralization under conditions of low oxygen concentration in the water column. A carbon budget is constructed that compares sources, stocks, transformations, and sinks of carbon in the top meter of sediment. A comparison of remineralization processes within the sediments implicates sulfate reduction as most important, followed by aerobic respiration and denitrification. Bacteria accounted for more than 90% of the total community biomass, compared to the metazoan invertebrates, due presumably to hypoxic stress MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: ESTUARINE RES FEDERATION RP - NOT IN FILE U3 - TC 11 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0160-8347 UR - ISI:000180611200004 L2 - MISSISSIPPI RIVER PLUME; OF-MEXICO; ORGANIC-CARBON; SULFATE REDUCTION; RESPIRATION RATES; DISSOLVED-OXYGEN; MARINE SEDIMENT; COASTAL WATERS; BOTTOM WATER; LOUISIANA SO - Estuaries 2002 ;25(6A):1097-1106 6677 UI - 9918 AU - Roy D AU - Daoudi L AU - Azaola A AD - Agr & Agri Food Canada, Ctr Food Res & Dev, St Hyacinthe, PQ J2S 8E3, CanadaUniv Autonoma Metropolitana, Dept Sistemas Biol, Mexico City 16000, DF, MexicoRoy, D, Agr & Agri Food Canada, Ctr Food Res & Dev, 3600 Casavant Blvd W, St Hyacinthe, PQ J2S 8E3, Canada TI - Optimization of galacto-oligosaccharide production by Bifidobacterium infantis RW-8120 using response surface methodology AB - Oligosaccharlde (OS) production, cell concentration (2x10(9) colony-forming unit/ml), lactose concentration (25% wt/vol), reaction time (6 h), and temperature (50degreesC) were chosen as the central condition of the central composite design (CCD) for optimizing the production process using Bifidobacterium intantis RW-8120 in skim milk. Statistical analysis (P < 0.01) revealed that the most relevant variable concerning OS production and yield was the lactose concentration. The coefficient of determination (R-2) is good for the second-order OS production model (0.92) and fairly good for the second-order nonlinear OS yield model (0.816). An increase of lactose concentration and temperature resulted in a higher OS production. The optimal values for OS production appear to be near the area associated with the central points of the modeling design except for the lactose concentration, which was 40% (wt/vol) of the final volume MH - Canada MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1367-5435 UR - ISI:000179052500013 L2 - prebiotic;probiotic strains;bifidobacteria;central composite design;galacto-oligosaccharides;lactose concentration;optimization;BETA-GALACTOSIDASE; PROBIOTICS; EXPRESSION; BIFIDUM; CLONING SO - Journal of Industrial Microbiology & Biotechnology 2002 ;29(5):281-285 6678 UI - 11914 AU - Royse DJ AU - Rhodes TW AU - Sanchez JE AD - Penn State Univ, Dept Plant Pathol, Mushroom Res Ctr, Buckhout Lab 316, University Pk, PA 16802, USAColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoRoyse, DJ, Penn State Univ, Dept Plant Pathol, Mushroom Res Ctr, Buckhout Lab 316, University Pk, PA 16802 USA TI - Vacuum-soaking of wood chip shiitake (Lentinula edodes) logs to reduce soak time and log weight variability and to stimulate mushroom yield MH - Mexico|Chiapas MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000173559200007 L2 - SUBSTRATE SO - Applied Microbiology and Biotechnology 2002 ;58(1):58-62 6679 UI - 11359 AU - Rozas M AU - Relano M AU - Zurita A AU - Beckman JE AD - Inst Astrofis Canarias, E-38200 Tenerife, Canarias, SpainUNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoCSIC, Madrid, SpainRozas, M, Inst Astrofis Canarias, E-38200 Tenerife, Canarias, Spain TI - Fabry-Perot observations of the ionized gas in the spiral galaxy NGC 6951 AB - We present two dimensional kinematic observations at high angular and velocity resolution measured via the Halpha emission line in the active barred spiral NGC 6951, obtained using the TAURUS II Fabry-Perot system on the 4.2 m William Herschel Telescope. From the radial velocity map we produced the rotation curve, which has a rapidly rising inner portion, and then remains remarkably at to large radii. Subtracting a two-dimensional projected model of this rotation from the observed map yields a residual velocity map which shows significant non-circular motions, above all in the circumnuclear zone, where they reach projected values of 45 km s(-1). The kinematic and morphological properties of this zone, a narrow well-defined annular region, point to inflow of gas resulting from perturbation in the stream-lined gas flow due to the bar, as predicted in dynamical models. The overall gas kinematics leads us to infer the presence of an inner disc within the main galactic disc, whose presence is marked by two inner Lindblad resonances at 180 pc and 900 pc from the centre respectively. Our map of the Halpha velocity dispersion shows characteristic values of 20 km s(-1) for the HII regions, and an obvious correlation between higher values and the brightest HII regions. The value rises to >100 km s(-1) as the nucleus is approached MH - Mexico|Baja California MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000175132100008 L2 - galaxies : individual : NGC 6951;galaxies : spiral;ISM : HII regions;CIRCUMNUCLEAR STAR-FORMATION; H-II REGIONS; SPACE-TELESCOPE OBSERVATIONS; NEAR-INFRARED OBSERVATIONS; ACTIVE GALACTIC NUCLEI; GRAND-DESIGN GALAXIES; DISK GALAXIES; INTERACTING GALAXIES; MOLECULAR GAS; SEYFERT-2 GALAXIES SO - Astronomy & Astrophysics 2002 ;386(1):42-59 6680 UI - 10859 AU - Rozen DE AU - de Visser JAGM AU - Gerrish PJ AD - Los Alamos Natl Lab, Los Alamos, NM 87545, USAMichigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824, USAUniv Dundee, Dundee, ScotlandUniv Wageningen & Res Ctr, Dept Genet, NL-6703 BD Wageningen, NetherlandsInst Mexicano Petr, Programa Invest & Matemat Aplicadas, Mexico City 07730, DF, MexicoGerrish, PJ, Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545, USA TI - Fitness effects of fixed beneficial mutations in microbial populations AB - Beneficial mutations are intuitively relevant to understanding adaptation [1-3], yet not all beneficial mutations are of consequence to the long-term evolutionary outcome of adaptation. Many beneficial mutations-mostly those of small effect-are lost due either to (1) genetic drift [4, 5] or to (2) competition among clones carrying different beneficial mutations, a phenomenon called the "Hill-Robertson effect" for sexual populations [6] and "clonal interference" for asexual populations [7]. Competition among clones becomes more prevalent with increasing genetic linkage and increasing population size, and it is thus generally characteristic of microbial populations [8, 9]. Together, these two phenomena suggest that only those beneficial mutations of large fitness effect should achieve fixation, despite the fact that most beneficial mutations produced are predicted to have very small fitness effects DO, 11]. Here,we confirm this prediction-both empirically and theoretically- by showing that fitness effects of fixed beneficial mutations follow a distribution whose mode is positive MH - Mexico|Distrito Federal MH - Netherlands MH - United Kingdom MH - USA PB - CAMBRIDGE: CELL PRESS RP - NOT IN FILE U3 - TC 42 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0960-9822 UR - ISI:000176468000029 L2 - ESCHERICHIA-COLI; ADAPTATION; EVOLUTION; COMPETITION SO - Current Biology 2002 ;12(12):1040-1045 6681 UI - 10742 AU - rroyo-Cabrales J AU - Gregorin R AU - Schlitter DA AU - Walker A AD - INAH, Lab Paleozool, Mexico City 06060, DF, MexicoSmithsonian Inst, Natl Museum Nat Hist, Biodivers Programs Off, Washington, DC 20560, USAUniv Sao Paulo, Museu Zool, BR-04299970 Sao Paulo, BrazilTexas A&M Univ, Dept Wildlife & Fisheries Sci, Texas Cooperat Wildlife Collect, College Stn, TX 77843, USAPenn State Univ, Dept Anthropol & Biol, University Pk, PA 16803, USAArroyo-Cabrales, J, INAH, Lab Paleozool, Moneda 16,Col Ctr, Mexico City 06060, DF, Mexico TI - The oldest African molossid bat cranium (Chiroptera : Molossidae) AB - A fossil cranium from Rusinga Island, Kenya, is described as a new species of free-tailed hat, Tadarida rusingae (Chiroptera, Molossidae). The sediments where the skull was found are dated by Potassium-Argon assay at about 17.5-18.0 million years before present (early Miocene). Comparisons with fossil molossids and all the extant species of Tadarida show that T. rusingae is distinguished by its large size, well developed posterior sagittal crest, deeply domed palate, and several features of the Upper molars. This skull represents one of the most complete fossil molossid bats known MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: SOC VERTEBRATE PALEONTOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Paleontology U5 - J;Article AV - English IS - 0272-4634 UR - ISI:000176772200014 L2 - OUTGROUPS; PROCONSUL; HOMOLOGY; KENYA SO - Journal of Vertebrate Paleontology 2002 ;22(2):380-387 6682 UI - 11624 AU - Rubin LJ AU - Badesch DB AU - Barst RJ AU - Galie N AU - Black CM AU - Keogh A AU - Pulido T AU - Frost A AU - Roux S AU - Leconte I AU - Landzberg M AU - Simonneau G AD - Univ Calif San Diego, Div Pulm & Crit Care Med, La Jolla, CA 92037, USAUniv Colorado, Hlth Sci Ctr, Denver, CO, USAColumbia Presbyterian Med Ctr, Babies & Childrens Hosp, New York, NY 10032, USAUniv Bologna, Bologna, ItalyRoyal Free Hosp, Sch Med, London, EnglandSt Vincents Hosp, Darlinghurst, NSW 2010, AustraliaInst Nacl Cardiol, Mexico City, DF, MexicoBaylor Coll Med, Houston, TX 77030, USAMethodist Hosp, Houston, TX 77030, USAActelion, Allschwil, SwitzerlandChildrens Hosp, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA, USAHop Antoine Beclere, Clamart, FranceRubin, LJ, Univ Calif San Diego, Div Pulm & Crit Care Med, 9300 Campus Point Dr,M-C 7372, La Jolla, CA 92037 USA TI - Bosentan therapy for pulmonary arterial hypertension AB - Background: Endothelin-1 is a potent vasoconstrictor and smooth-muscle mitogen. In a preliminary study, the orally administered dual endothelin-receptor antagonist bosentan improved exercise capacity and cardiopulmonary hemodynamics in patients with pulmonary arterial hypertension. The present trial investigated the effect of bosentan on exercise capacity in a larger number of patients and compared two doses. Methods: In this double-blind, placebo-controlled study, we randomly assigned 213 patients with pulmonary arterial hypertension (primary or associated with connective-tissue disease) to receive placebo or to receive 6.25 mg of bosentan twice daily for 4 weeks followed by either of two doses of bosentan (125 or 250 mg twice daily) for a minimum of 12 weeks. The primary end point was the degree of change in exercise capacity. Secondary end points included the change in the Borg dyspnea index, the change in the World Health Organization (WHO) functional class, and the time to clinical worsening. Results: At week 16, patients treated with bosentan had an improved six-minute walking distance; the mean difference between the placebo group and the combined bosentan groups was 44 m (95 percent confidence interval, 21 to 67; P<0.001). Bosentan also improved the Borg dyspnea index and WHO functional class and increased the time to clinical worsening. Conclusions: The endothelin-receptor antagonist bosentan is beneficial in patients with pulmonary arterial hypertension and is well tolerated at a dose of 125 mg twice daily. Endothelin-receptor antagonism with oral bosentan is an effective approach to therapy for pulmonary arterial hypertension. (N Engl J Med 2002;346:896-903.) Copyright (C) 2002 Massachusetts Medical Society MH - Australia MH - USA MH - United Kingdom MH - France MH - Italy MH - Mexico|Distrito Federal MH - Switzerland PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 635 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0028-4793 UR - ISI:000174464100005 L2 - CONTINUOUS INTRAVENOUS EPOPROSTENOL; SYSTEMIC-SCLEROSIS; 6-MINUTE WALK; HEART-FAILURE; PROSTACYCLIN; ENDOTHELIN-1; DISEASE SO - New England Journal of Medicine 2002 ;346(12):896-903 6683 UI - 10611 AU - Rubio-Chevannier H AU - Ramirez-Segura R AU - Campos-Castello J AU - Serdio-Carranza A AU - Torres MT AD - Unidad Neurol Satelite, Serv Neurol, Ciudad Satelite, MexicoUnidad Neurol Satelite, Serv Neurol Pediat, Ciudad Satelite, MexicoHosp Clin Univ San Carlos, Madrid, SpainHosp Pediat Aragon, Serv Pediat, Mexico City, DF, Mexico TI - Spindle coma secondary to thyrotoxicosis MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000176942900018 L2 - PROGNOSTIC VALUE; ENCEPHALITIS SO - Revista de Neurologia 2002 ;34(11):1096-1097 6684 UI - 8794 AU - Rubio-Gonzalez C AU - Mason JJ AD - Ctr Ingn & Desarrollo Ind, Queretaro 76130, MexicoUniv Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556, USARubio-Gonzalez, C, Ctr Ingn & Desarrollo Ind, Pie de la Cuesta 702,Desarrollo San Pablo, Queretaro 76130, Mexico TI - Dynamic stress intensity factor due to concentrated loads on a propagating semi-infinite crack in orthotropic materials AB - The elastodynamic response of an infinite orthotropic material with a semi-infinite crack propagating at constant speed under the action of concentrated loads on the crack faces is examined. Solution for the stress intensity factor history around the crack tip is found for the loading modes I and II. Laplace and Fourier transforms along with the Wiener-Hopf technique are employed to solve the equations of motion. The asymptotic expression for the stress near the crack tip is analyzed which lead to a closed-form solution of the dynamic stress intensity factor. It is found that the stress intensity factor for the propagating crack is proportional to the stress intensity factor for a stationary crack by a factor similar to the universal function k(v) from the isotropic case. Results are presented for orthotropic materials as well as for the isotropic case MH - Mexico|Queretaro MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mechanics U5 - J;Article AV - English IS - 0376-9429 UR - ISI:000181927900006 L2 - stress intensity factor;dynamic fracture;orthotropic materials;propagating crack;SEMIINFINITE CRACK SO - International Journal of Fracture 2002 ;118(1):77-96 6685 UI - 10185 AU - Rudzinski WE AU - Oehlers L AU - Zhang Y AD - SW Texas State Univ, Dept Chem, San Marcos, TX 78666, USASW Texas State Univ, Inst Environm & Ind Sci, San Marcos, TX 78666, USAUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, MexicoRudzinski, WE, SW Texas State Univ, Dept Chem, San Marcos, TX 78666, USA TI - Tandem mass spectrometric characterization of commercial naphthenic acids and a Maya crude oil AB - Elemental analysis, Fourier transform infrared, C-13 nuclear magnetic resonance, and electrospray ionization/mass spectrometry (ESI/MS) experiments were performed on two commercial naphthenic acid mixtures in order to determine the acidity, ring type, and carbon number distribution. Critical MS/TMS experimental parameters, i.e., isolation width and collision-activated dissociation energy, were optimized and fragmentation patterns elucidated for a series of acid standards and the commercial naphthenic acid mixtures. The MS/MS experiments confirm that P&B and Fluka naphthenic acid mixtures consist primarily of carboxylic acids with dominant hydrogen deficiency values of -6 and 0, respectively, with respect to an alkanoic acid reference. The MS/MS experiments validated the preponderance of carboxylic acid moieties in these samples. The approach was then used to determine the composition of a Maya crude oil extract. Surprisingly, the extract was found to contain a dominant alkylsulfonic acid homologous series MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000178122100024 L2 - HEAVY PETROLEUM; IDENTIFICATION; RESOLUTION; ORIGIN SO - Energy & Fuels 2002 ;16(5):1178-1185 6686 UI - 11566 AU - Ruhle M AU - Seeger T AU - Redlich P AU - Grobert N AU - Terrones M AU - Walton DRM AU - Kroto HW AD - Max Planck Inst Met Res, D-70174 Stuttgart, GermanyUniv Sussex, CPES, Fullerene Sci Ctr, Brighton BN1 9JQ, E Sussex, EnglandUNAM, Inst Fis, Lab Juriquilla, Queretaro 76000, MexicoRuhle, M, Max Planck Inst Met Res, Seestr 92, D-70174 Stuttgart, Germany TI - Novel SiOx-coated carbon nanotubes AB - A room temperature colloidal method for coating carbon nanotubes with silicon oxide is described. Morphology, chemical composition and SiOx/C interfaces of the coatings were investigated using state-of-the-art transmission electron microscopy and high spatially resolved electron energy-loss spectroscopy. The amorphous SiOx coatings exhibit a thickness of up to 10 mn. In addition, coatings were also created by a high temperature route. However, they tend to be more unstable and spallate when compared to coatings deposited at room temperature MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - SEOUL: KOREAN ASSOC CRYSTAL GROWTH, INC RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1229-9162 UR - ISI:000174500200001 L2 - carbon nanotubes;coating;SOx;HRTEM;HREELS;ENERGY-LOSS SPECTROSCOPY; PULP FIBERS; TEMPLATES; DEPOSITION; NANORODS; CHARGE SO - Journal of Ceramic Processing Research 2002 ;3(1):1-5 6687 UI - 10166 AU - Ruiz-Cortes VA AU - Dainty JC AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Dept Opt, Ensenada 22860, Baja California, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Photon Grp, London SW7 2BZ, EnglandRuiz-Cortes, VA, Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Dept Opt, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - Experimental light-scattering measurements from large-scale composite randomly rough surfaces AB - We present experimental measurements of the angular distribution of light scattered from large-scale composite randomly rough surfaces (oceanlike surfaces) with different statistical parameters illuminated at small and large angles of incidence. The surfaces are composed of a small-scale roughness superimposed on a slowly (large-scale) varying surface. The large-scale surfaces are diamond-machined periodic surfaces made on aluminum substrates and have either a sinusoidal or a Stokes wave profile. The small-scale roughness is added with microlithographic techniques, and the surfaces are then gold coated. For a linearly polarized incident beam, it is found that the diffusely scattered light is strongly depolarized and that its pattern is rather different for each large-scale surface profile. Enhanced backscattering is also observed. (C) 2002 Optical Society of America MH - United Kingdom MH - Mexico|Baja California PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000178289200012 L2 - KIRCHHOFF APPROXIMATION; BACKSCATTERING ENHANCEMENT; ELECTROMAGNETIC-WAVES; MULTIPLE-SCATTERING; DEPOLARIZATION SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2002 ;19(10):2043-2052 6688 UI - 11283 AU - Ruiz-Fernandez AC AU - Hillaire-Marcel C AU - Ghaleb B AU - Soto-Jimenez M AU - Paez-Osuna F AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mazatlan 82040, Sin, MexicoRuiz-Fernandez, AC, Univ Quebec, Ctr GEOTOP UQAM McGill, 201 President Kennedy, Montreal, PQ H2Y 3X7, Canada TI - Recent sedimentary history of anthropogenic impacts on the Culiacan River Estuary, northwestern Mexico: geochemical evidence from organic matter and nutrients AB - Pb-210 geochronology and sediment profiles of carbon, phosphorus and nitrogen were used to study time dependent changes in nutrients fluxes to Culiacan River Estuary. Results indicate that the release of urban sewage and agriculture wastes transported through Culiacan River has produced historically increased carbon, phosphorus and nitrogen fluxes to the study area. C:N:P elemental ratios showed that increments in the nutrients input begins simultaneously for C, N and P in 1948 with the clearing of the catchment for agriculture, although excess of nutrients input increased most importantly around the 1970s to roughly follow the rapidly growing population of Culiacan City. C/N ratios, delta(13)C and delta(15)N suggested that nutrient enrichment is mostly influenced by sewage delivered through Culiacan River. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Sinaloa PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 12 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000175229700010 L2 - Pb-210 geochronology;isotope ratios;nutrient enrichment;sewage pollution;sedimentary organic matter;AGRICULTURAL DRAINAGE-BASIN; LONG-ISLAND SOUND; HEAVY-METALS; MARINE-SEDIMENTS; LAKE SEDIMENTS; SOURCE IDENTIFICATION; PARTICULATE MATTER; CONTINENTAL-SHELF; STABLE-ISOTOPE; C/N RATIOS SO - Environmental Pollution 2002 ;118(3):365-377 6689 UI - 9640 AU - Ruiz-Herrera J AU - Sentandreu R AD - Univ Valencia, Fac Farm, Secc Microbiol, E-46100 Burjassot, Valencia, SpainIPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Dept Ingn Genet, Guanajuato, MexicoSentandreu, R, Univ Valencia, Fac Farm, Secc Microbiol, Ave Vicent Andres Estelles S-N, E-46100 Burjassot, Valencia, Spain TI - Different effectors of dimorphism in Yarrowia lipolytica AB - Yarrowia lipolytica is an ascomycete with biotechnological potential. In common media, the fungus grows as a mixture of yeast-like and short mycelial cells. The environmental factors that affect dimorphism in the wildtype strain, W29, and its auxotrophic derivative, PO1a, were analyzed. In both strains, pH was the most important factor regulating the dimorphic transition. Mycelium formation was maximal at pH near neutrality and decreased as pH was lowered to become almost null at pH 3. Carbon and nitrogen sources, namely glucose and ammonium, were also important for mycelium formation; and their effect was antagonized by some alternative carbon and nitrogen sources. Citrate was an important positive effector of mycelium growth. Anaerobic stress induced formation of mycelial cells. The importance of the protein kinase A pathway was suggested by the inhibition of mycelium growth by cAMP. We propose that the interplay of these factors regulates the adaptation of the fungus, to better exploit its natural ecological niches MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000179674200014 L2 - dimorphic fungi;mycelial cells;yeast-mycelial cell transition;cAMP;GERM-TUBE FORMATION; PH-REGULATED GENE; CANDIDA-ALBICANS; USTILAGO-MAYDIS; CYCLIC-AMP SO - Archives of Microbiology 2002 ;178(6):477-483 6690 UI - 10328 AU - Ruiz-Herrera J AU - Martinez AI AU - Sentandreu R AD - Unidad Mexico DF, Dept Ingn Genet, Unidad Irapuato & Genet & Biol Mol, Ctr Invest & Estudios Avanzados Inst Politecn, Irapuato, Gto, MexicoUniv Valencia, Dept Microbiol & Ecol, Fac Farm, Valencia, SpainSentandreu, R, Univ Valencia, Seccio Dept Microbiol, Fac Farm, Avgda Vicent Andres Estelles S-N, E-46100 Valencia, Spain TI - Determination of the stability of protein pools from the cell wall of fungi AB - Stability of the protein populations present in the cell wall of three ascomycetous fungi Candida albicans, Saccharomyces cerevisiae and Yarrowia lipolytica was investigated. Cell wall proteins were either labeled with biotin or radiolabeled with amino acids, and chased for a period of time representing several generations. Proteins linked by non-covalent or covalent bonds were separated and their turnover was analyzed. No significant turnover took place during the chase period, and in fact radioactive proteins were accumulated in the wall during the period possibly by transfer through the secretory pathway. This transfer did not involve de novo protein synthesis; it was inhibited by azide, and by incubation of a sec] mutant of S. cerevisiae at the non-permissive temperature. It is concluded that proteins bound to the cell wall are stable and that there is no precursor-product relationship among those linked by non-covalent bonds and the covalently bound ones. (C) 2002 Editions scientifques et medicales Elsevier SAS. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 0923-2508 UR - ISI:000177803200008 L2 - turnover of wall proteins;wall protein non-covalently linked;wall proteins covalently-linked;SACCHAROMYCES-CEREVISIAE; CANDIDA-ALBICANS; MYCELIAL CELLS; YEAST SO - Research in Microbiology 2002 ;153(6):373-378 6691 UI - 11804 AU - Ruiz-Leon J AU - Castellanos A AU - Ramos LE AD - IPN, CINVESTAV, Unidad Guadalajara, Guadalajara, Jalisco, MexicoAcad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague, Czech RepublicRuiz-Leon, J, IPN, CINVESTAV, Unidad Guadalajara, POB 31-438,Plaza Luna, Guadalajara, Jalisco, Mexico TI - A definition of column reduced proper rational matrices AB - The aim of this work is to develop analogue concepts of column reduced polynomial matrices for proper rational matrices. A definition of column reducedness for a class of proper rational matrices is proposed and the properties of such matrices are studied, in particular reduction to column reduced form by elementary operations over the ring of proper rational functions, and the relationship between the degrees of the invariant factors of a column reduced matrix and the so-defined column indices. The physical significance of such matrices in terms of their finite structure is explained; this interpretation completely complements the physical interpretation of a column reduced polynomial matrix. An application of the properties of column reduced proper rational matrices to the decoupling problem is also presented: the infinite structure which can be obtained while decoupling a linear multivariable system by non-regular static state feedback is completely characterized MH - Czech Republic MH - Mexico|Jalisco PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000173791100005 L2 - INVARIANTS SO - International Journal of Control 2002 ;75(3):195-203 6692 UI - 10891 AU - Ruiz-Perez F AU - Leon-Kempis R AU - Santiago-Machuca A AU - Ortega-Pierres G AU - Barry E AU - Levine M AU - Gonzalez-Bonilla C AD - Hosp Infectol Dr Daniel Mendez Hernandez, Ctr Med La Raza, IMSS, Unidad Invest Med Inmunol & Infectol, Mexico City, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Mexico City 07738, DF, MexicoUniv Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAGonzalez-Bonilla, C, Hosp Infectol Dr Daniel Mendez Hernandez, Ctr Med La Raza, IMSS, Unidad Invest Med Inmunol & Infectol, Apartado Postal 15-095, Mexico City, DF, Mexico TI - Expression of the Plasmodium falciparum immunodominant epitope (NANP)(4) on the surface of Salmonella enterica using the autotransporter MisL AB - Gram-negative bacterial proteins which are exported from the cytosol to the external environment by the type V secretion system are also known as auto transporters. Once translocated to the periplasmic compartment by the sec-dependent general secretory pathway, their C-terminal domain forms a pore through which the N-terminal domain travels to the outer membrane without the need of other accessory proteins. MisL (protein of membrane insertion and secretion) is a protein of unknown function located in the pathogenicity island SPI-3 of Salmonella enterica and classified as an autotransporter due to its high homology to Escherichia coli AIDA-I. In the present work, the MisL C-terminal translocator domain was used to display the immunodominant B-cell epitope of the circumsporozoite protein (CSP) from Plasmodium falciparum on the surface of Salmonella enterica serovar Typhimurium (serovar Typhimurium SL3261) and serovar Typhi (serovar Typhi CVD 908). The MisL beta domain was predicted by alignment with AIDA-I, amplified from serovar Typhimurium SL3261, cloned in a plasmid fused to four repeats of the tetrapeptide NANP behind the Escherichia coli heat-labile enterotoxin B subunit signal peptide to ensure periplasmic traffic, and expressed under the control of the anaerobically inducible nirB promoter. The fusion protein was translocated to the outer membrane of both bacterial strains, although the foreign epitope was displayed more efficiently in serovar Typhimurium SL3261, which elicited a better specific antibody response in BAB/c mice. More importantly, antibodies were able to recognize the native CSP in P. falciparum sporozoites. These results confirm that MisL is indeed an autotransporter and that it can be used to express foreign immunogenic epitopes on the surface of gram-negative bacteria MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 19 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000176302600036 L2 - AIDA-I AUTOTRANSPORTER; ESCHERICHIA-COLI; CIRCUMSPOROZOITE PROTEIN; PATHOGENICITY ISLAND; SHIGELLA-FLEXNERI; FLOW-CYTOMETRY; NIRB PROMOTER; VACCINE; SECRETION; IMMUNOGENICITY SO - Infection and Immunity 2002 ;70(7):3611-3620 6693 UI - 10232 AU - Ruiz-Vega D AU - Olivares TIA AU - Salinas DO AD - Univ Liege, B-4000 Liege, BelgiumInst Politecn Nacl, Escuela Super Ingn Mecan & Elect, Mexico City, DF, MexicoRuiz-Vega, D, Univ Liege, B-4000 Liege, Belgium TI - An approach to the initialization of dynamic induction motor models AB - This paper proposes a steady state method as a solution to the problem of initializing the dynamic models of induction motors in transient stability studies. The results of the proposed method are compared to those obtained by two conventional initialization methods that are used in current production grade simulation programs, in a test power system that includes an industrial subsystem with a significant amount of induction motor loads. It is also shown in this paper that using a correct initialization method for these dynamic devices is important, because the choice of the method can modify the results of the dynamic time-domain simulation, and therefore the assessment of power system stability MH - Belgium MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000178057200031 L2 - induction motor models;numerical initialization;power flow methods;transient stability simulation SO - Ieee Transactions on Power Systems 2002 ;17(3):747-751 6694 UI - 10054 AU - Ruiz F AU - Martinez JR AU - Gonzalez-Hernandez J AD - Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, SLP, MexicoMIT, GR Harrison Spect Lab, Cambridge, MA 02139, USACtr Invest & Estud Avanzados, Unidad Queretaro, Queretaro 76010, Qro, MexicoRuiz, F, Univ Autonoma San Luis Potosi, Fac Ciencias, Alvaro Orbrego 64, San Luis Potosi 78000, SLP, Mexico TI - A simple model to analyze vibrationally decoupled modes on SiO2 glasses AB - By using a simple model, the sharp bands at about 495 and 606 cm(-1) in the Raman spectrum of vitreous SiO2 have been identified as due to vibrational modes of regular rings with 4- and 3-members, respectively. For that the restrictions in the SiO-Si intertetrahedral angle, which depends on the number of members in a ring, are taken into account. Our model also predict infrared (IR) features, corresponding to ring structures, these vibrational IR modes might be weak and quite broad and probably buried by the LO-TO pairs modes at 1160-1250 cm(-1). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000178635000015 L2 - SiO2 glasses;Raman spectrum;infrared;INFRARED REFLECTION SPECTROSCOPY; VITREOUS SIO2; SILICON DIOXIDE; BERYLLIUM FLUORIDE; DYNAMICS; DISORDER; FILMS; RAMAN; RINGS; GEL SO - Journal of Molecular Structure 2002 ;641(2-3):243-250 6695 UI - 9707 AU - Rupp H AU - Zarain-Herzberg A AU - Maisch B AD - Univ Marburg, Dept Internal Med & Cardiol, Mol Cardiol Lab, D-35033 Marburg, GermanyUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mol Biol Lab, Mexico City 04510, DF, MexicoRupp, H, Univ Marburg, Dept Internal Med & Cardiol, Mol Cardiol Lab, Karl Von Frisch Str 1, D-35033 Marburg, Germany TI - The use of partial fatty acid oxidation inhibitors for metabolic therapy of angina pectoris and heart failure AB - Background: Partial fatty acid oxidation inhibitors have raised great interest since they are expected to counteract a dysregulated gene expression of hypertrophied cardiocytes. Some of these compounds have been developed for treating non-insulin-dependent diabetes mellitus and stable angina pectoris. A shift from fatty acid oxidation to glucose oxidation leads to a reduced gluconeogenesis and improved economy of cardiac work. An increased glucose oxidation can be achieved with the following enzyme inhibitors: etomoxir, oxfenicine, methyl palmoxirate, S-15176, metoprolol, amiodarone, perhexiline (carnitine palmitoyltransferase-1); aminocarnitine, perhexiline (carnitine palmitoyltransferase-2); hydrazonopropionic acid (carnitine-acylcarnitine translocase); MET-88 (gamma-butyrobetaine hydroxylase); 4-bromocrotonic acid, trimetazidine, possibly ranolazine (thiolases); hypoglycin (butyryl-CoA dehydrogenase); dichloroacetate (pyruvate dehydrogenase kinase). Clinical Trials with trimetazidine and ranolazine showed that this shift in substrate oxidation has an antianginal action. Etomoxir and MET-88 improved the function of overloaded hearts by increasing the density of the Ca2+ pump of sarcoplasmic reticulum (SERCA2). The promoters of SERCA2 and alpha-myosin heavy-chain exhibit sequences which are expected to respond to transcription factors responsive to glucose metabolites and/or peroxisome proliferator-responsive element (PPAR) agonists. Further progress in elucidating novel compounds which upgregulate SERCA2 expression is closely linked to the characterization of regulatory sequences of the SERCA2 promoter MH - Germany MH - Mexico|Distrito Federal PB - MUNICH: URBAN & VOGEL RP - NOT IN FILE U3 - TC 19 U4 - Cardiac & Cardiovascular Systems U5 - J;Review AV - English IS - 0340-9937 UR - ISI:000179539200007 L2 - heart failure;angina pectoris;metabolism;fatty acid oxidation;glucose oxidation;gene expression;PROLIFERATOR-ACTIVATED RECEPTOR; BUTYROBETAINE HYDROXYLASE INHIBITOR; SARCOPLASMIC-RETICULUM CA2+-ATPASE; PALMITOYLTRANSFERASE-I INHIBITION; LEFT-VENTRICULAR DYSFUNCTION; CARDIAC HYPERTROPHIC GROWTH; LONG-CHAIN ACYLCARNITINE; MYOCARDIAL INFARCT SIZE; DENERVATED DOG HEART; OVERLOADED RAT-HEART SO - Herz 2002 ;27(7):621-636 6696 UI - 9832 AU - Rusanov AL AU - Likhachev DY AU - Mullen K AD - Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 119991, RussiaNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoMax Planck Inst Polymer Res, D-55128 Mainz, GermanyRusanov, AL, Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, 28 Ul Vavilova, Moscow 119991, Russia TI - Electrolytic proton-conducting membranes based on aromatic condensation polymers AB - The results of investigations in the field of electrolytic proton-conducting membranes based on aromatic condensation polymers are analysed and summarised. Primary attention is paid to characteristics of the starting polymer such as thermal stability, water absorption and proton conductivity. General approaches to the preparation of aromatic condensation polymers with high proton conductivity are considered, which include sulfonation, synthesis on the basis of monomers containing sulfonic groups, incorporation of sulfoalkylated substituents and the formation of acid-basic polymer complexes MH - Germany MH - Mexico|Distrito Federal MH - Russia PB - MOSCOW: MEZHDUNARODNAYA KNIGA RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Multidisciplinary U5 - J;Review AV - Russian IS - 0042-1308 UR - ISI:000179139400004 L2 - POLYAROMATIC ETHER-KETONES; FUEL-CELLS; EXCHANGE MEMBRANES; SULFOPROPYLATED POLY(BENZIMIDAZOLE); POLY(ARYL-ETHER-ETHER-KETONE) PEEK; PHYSICAL-PROPERTIES; WATER; ACID; POLYBENZIMIDAZOLE; POLYELECTROLYTES SO - Uspekhi Khimii 2002 ;71(9):862-877 6697 UI - 10498 AU - Ryabov AD AU - Otto S AU - Samuleev PV AU - Polyakov VA AU - Alexandrova L AU - Kazankov GM AU - Shova S AU - Revenco M AU - Lipkowski J AU - Johansson MH AD - Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaUniv Orange Free State, Dept Chem, ZA-9300 Bloemfontein, South AfricaDI Mendeleev Moscow Univ Chem Technol, Moscow 125820, RussiaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPolish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, PolandState Univ Moldova, Dept Chem, Kishinev 2009, MoldovaLund Univ, Ctr Chem & Chem Engn, S-22100 Lund, SwedenRyabov, AD, Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia TI - Structural and mechanistic look at the orthoplatination of aryl oximes by dichlorobis(sulfoxide or sulfide)platinum(II) complexes AB - Structural and mechanistic aspects of orthoplatination of acetophenone and benzaldehyde oximes by the platinum(II) sulfoxide and sulfide complexes [PtCl2L2] (2, L = SOMe2 (a), rac-SOMePh (b), R-SOMe(C6H4Me-4) (c), and SMe2 (d)) to afford the corresponding platinacycles cis-(CS)-[Pt-II(C6H3-2-CR'=NOH-5-R)CI(L)] (3, R, R' = H, Me) have been investigated. The reaction of acetophenone oxime with sulfoxide complex 2a in methanol solvent occurs noticeably faster than with sulfide complex 2d due to the fact that the sulfoxide is a much better platinum(II) leaving ligand than the sulfide. Evidence is presented that the orthoplatination is a multistep process. The formation of unreactive dichlorobis(N-oxime)platinum(II) cations accounts for the rate retardation by excess acetophenone oxime and suggests the importance of pseudocoordinatively unsaturated species for the C-H bond activation by Pt-II. A comparative X-ray structural study of dimethyl sulfoxide platinacycle 3b (R = R' = Me) and its sulfide analogue 3e (R = H, R' - Me), as well as of SOMePh complex 3c (R = H, R' = Me), indicated that they are structurally similar and a sulfur ligand is coordinated in the cis position with respect to the Q-bound phenyl carbon. The differences concern the Pt-S bond distance, which is notably longer in the sulfide complex 3e (2.2677(11) Angstrom) as compared to that in sulfoxide complexes 3b (2.201(2)-2.215(2) Angstrom) and 3c (2.2196(12) Angstrom). Whereas the metal plane is practically a plane of symmetry in 3b due to the H-bonding between the sulfoxide oxygen and the proton at carbon ortho to the Pt-C bond, an S-bonded methyl of SOMePh and SMe2 is basically in the platinum(II) plane in complexes 3c and 3e, respectively. There are intra- and intermolecular hydrogen bond networks in complex 3b. An interesting structural feature of complex 3c is that the two independent molecules in the asymmetric unit of the crystal reveal an extremely short Pt-Pt contact of 3.337 Angstrom MH - Mexico|Distrito Federal MH - Moldova MH - Poland MH - Russia MH - South Africa MH - Sweden PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000177365500034 L2 - RAY CRYSTAL-STRUCTURE; PLANAR PLATINUM(II) COMPLEXES; TRANSITION-METAL-COMPLEXES; SUBSTITUTION-REACTIONS; SULFOXIDE COMPLEXES; OXIDATIVE ADDITION; DIMETHYL-SULFOXIDE; BOND ACTIVATION; KINETICS; SULFOXIDE)PLATINUM(II) SO - Inorganic Chemistry 2002 ;41(16):4286-4294 6698 UI - 10241 AU - Ryan-Weber E AU - Koribalski BS AU - Staveley-Smith L AU - Jerjen H AU - Kraan-Korteweg RC AU - Ryder SD AU - Barnes DG AU - de Blok WJG AU - Kilborn VA AU - Bhathal R AU - Boyce PJ AU - Disney MJ AU - Drinkwater MJ AU - Ekers RD AU - Freeman KC AU - Gibson BK AU - Green AJ AU - Haynes RF AU - Henning PA AU - Juraszek S AU - Kesteven MJ AU - Knezek PM AU - Mader S AU - Marquarding M AU - Meyer M AU - Minchin RF AU - Mould JR AU - O'Brien J AU - Oosterloo T AU - Price RM AU - Putman ME AU - Sadler EM AU - Schroder A AU - Stewart IM AU - Stootman F AU - Waugh M AU - Webster RL AU - Wright AE AU - Zwaan MA AD - Univ Melbourne, Sch Phys, Melbourne, Vic 3010, AustraliaCSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaMt Stromlo & Siding Spring Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoAnglo Australian Observ, Epping, NSW 1710, AustraliaSwinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, AustraliaUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Western Sydney Macarthur, Dept Phys, Campbelltown, NSW 2560, AustraliaUniv Bristol, Dept Phys, Bristol BS8 1TL, Avon, EnglandUniv Wales Coll Cardiff, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, WalesUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAWIYN Inc, Tucson, AZ 85726, USAASTRON, NL-7990 AA Dwingeloo, NetherlandsUniv Colorado, CASA, Boulder, CO 80309, USAUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandRyan-Weber, E, Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia TI - The 1000 brightest HIPASS galaxies: Newly cataloged galaxies AB - The H I Parkes All-Sky Survey (HIPASS) is a blind 21 cm survey for extragalactic neutral hydrogen, covering the whole southern sky. The HIPASS Bright Galaxy Catalog (BGC) is a subset of HIPASS and contains the 1000 H I brightest (peak flux density) galaxies. Here we present the 138 HIPASS BGC galaxies that had no redshift measured prior to the Parkes multibeam H I surveys. Of the 138 galaxies, 87 are newly cataloged. Newly cataloged is defined as having no optical ( or infrared) counterpart in the NASA/IPAC Extragalactic Database. Using the Digitized Sky Survey, we identify optical counterparts for almost half of the newly cataloged galaxies, which are typically of irregular or Magellanic morphological type. Several H I sources appear to be associated with compact groups or pairs of galaxies rather than an individual galaxy. The majority ( 57) of the newly cataloged galaxies lie within 10degrees of the Galactic plane and are missing from optical surveys as a result of confusion with stars or dust extinction. This sample also includes newly cataloged galaxies first discovered by Henning et al. in the H I shallow survey of the zone of avoidance. The other 30 newly cataloged galaxies escaped detection because of their low surface brightness or optical compactness. Only one of these, HIPASS J0546-68, has no obvious optical counterpart, as it is obscured by the Large Magellanic Cloud. We find that the newly cataloged galaxies with |b|>10degrees are generally lower in H I mass and narrower in velocity width compared with the total HIPASS BGC. In contrast, newly cataloged galaxies behind the Milky Way are found to be statistically similar to the entire HIPASS BGC. In addition to these galaxies, the HIPASS BGC contains four previously unknown H I clouds MH - Australia MH - United Kingdom MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000178143400009 L2 - galaxies : distances and redshifts;galaxies : fundamental parameters;galaxies : kinematics and dynamics;radio emission lines;surveys;SURFACE-BRIGHTNESS GALAXIES; NEUTRAL HYDROGEN SURVEY; BLIND HI SURVEY; DWARF GALAXIES; SPIRAL GALAXIES; NORTHERN DWARF; MASS FUNCTION; MILKY-WAY; AVOIDANCE; ZONE SO - Astronomical Journal 2002 ;124(4):1954-1974 6699 UI - 11116 AU - Rydell J AU - Arita HT AU - Santos M AU - Granados J AD - Univ Gothenburg, Dept Zool, SE-40530 Gothenburg, SwedenUNAM, Inst Ecol, Morelia 58089, Michoacan, MexicoRydell, J, Univ Gothenburg, Dept Zool, Box 463, SE-40530 Gothenburg, Sweden TI - Acoustic identification of insectivorous bats (order Chiroptera) of Yucatan, Mexico AB - The echolocation calls of insectivorous bats of the northern Yucatan Peninsula, Mexico, with the exception of the phyllostomids and molossids, are presented, The aim is to provide a catalogue of bat sounds that can be used for acoustic inventories of insectivorous bats using the Pettersson heterodyne and time-expansion bat detectors. The acoustic method can be used alone or in combination with inventories based on mist-netting, a method more suitable for the low-intensity echolocators (mainly the phyllostomids), which are difficult to monitor acoustically. The insectivorous species of the Yucatan are generally easy to identify by their echolocation calls, particularly when combined with visual observations of foraging bats at dusk MH - Mexico|Michoacan MH - Sweden PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Zoology U5 - J;Article AV - English IS - 0952-8369 UR - ISI:000175690400003 L2 - conservation;echolocation;inventories;tropics;ultrasound;insectivorous bats;ECHOLOCATION CALLS; NEOTROPICAL BATS; HABITAT; VESPERTILIONIDAE; EMBALLONURIDAE; FLIGHT; DESIGN SO - Journal of Zoology 2002 ;257():27-36 6700 UI - 10627 AU - Rzeznicka I AU - de la Garza LM AU - Matsushima T AD - Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0600811, JapanHokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 0600810, JapanUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoMatsushima, T, Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0600811, Japan TI - Surface, phase transitions of Pt(110) studied by desorption dynamics of product CO2 in steady-state CO oxidation AB - The transformation of (1 X 2) into (1 X 1) on a Pt(110) surface in the course of CO oxidation was studied through the analysis of both angular and velocity distributions of desorbing product CO2 and low-energy electron diffraction (LEED) intensity. The intensity of half-order LEED spots decreased quickly, showing the beginning of the transformation of (1 X 2)-->(1 X 1) just below the kinetic transition, where the rate-determining step switched from CO adsorption to O-2 dissociation. On the other hand, the angular distribution of, desorbing CO2 sharply changed at a CO pressure far above the kinetic transition, where (1 X 2) domains disappeared. Below this approximate CO pressure, CO2 was mostly formed on (1 X 2) domains regardless of its reduced area. (C) 2002 American Vacuum Society MH - Japan MH - Mexico|Baja California PB - MELVILLE: A V S AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000176912500047 L2 - CARBON-DIOXIDE; MOLECULAR-BEAM; REACTION SITES; TRANSFORMATION; 1X1 SO - Journal of Vacuum Science & Technology A-Vacuum Surfaces and Films 2002 ;20(4):1475-1480 6701 UI - 11723 AU - Rzysko W AU - Sokolowski S AU - Pizio O AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRzysko, W, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Theory of adsorption in a polydisperse templated porous material: Hard sphere systems AB - A theoretical description of adsorption in a templated porous material, formed by an equilibrium quench of a polydisperse fluid composed of matrix and template particles and subsequent removal of the template particles is presented. The approach is based on the solution of the replica Ornstein-Zernike equations with Percus-Yevick and hypernetted chain closures. The method of solution uses expansions of size-dependent correlation functions into Fourier series, as described by Lado [J. Chem. Phys. 108, 6441 (1998)]. Specific calculations have been carried out for model systems, composed of hard spheres. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000174087000036 L2 - ORTHOGONAL POLYNOMIAL-EXPANSIONS; ORNSTEIN-ZERNIKE EQUATIONS; QUENCHED-ANNEALED FLUIDS; RANDOM-MEDIA; ARBITRARY MATRICES; LIQUID; DISTRIBUTIONS; SILICA; THERMODYNAMICS; EQUILIBRIUM SO - Journal of Chemical Physics 2002 ;116(10):4286-4292 6702 UI - 10191 AU - Saar E AU - Einasto J AU - Toomet O AU - Starobinsky AA AU - Andernach H AU - Einasto M AU - Kasak E AU - Tago E AD - Tartu Observ, EE-61602 Toravere, EstoniaUniv Tokyo, Res Ctr Early Universe, Tokyo 1130033, JapanLD Landau Theoret Phys Inst, Moscow 117334, RussiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoEinasto, J, Tartu Observ, EE-61602 Toravere, Estonia TI - The supercluster-void network V. The regularity periodogram AB - We analyze the distribution of Abell clusters of galaxies to study the regularity of the supercluster-void network. We apply a new method, the regularity periodogram, that is sensitive to the geometry of the location of clusters, and measure the regularity of the network. We find that the supercluster-void network resembles a cubic lattice over the entire volume considered (out to the distance of 350 h(-1) Mpc). The distribution of clusters in rich superclusters is not isotropic: it is periodic along a cubic lattice approximately aligned with the supergalactic coordinates SGX; SGY; SGZ. This large-scale inhomogeneity does not contradict recent CMB data, but its theoretical explanation remains a challenge MH - Estonia MH - Japan MH - Mexico|Guanajuato MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178193200007 L2 - cosmology : observations;cosmology : large-scale structure of the Universe;LARGE-SCALE DISTRIBUTION; 2-DIMENSIONAL POWER SPECTRUM; CAMPANAS REDSHIFT SURVEY; GALACTIC POLE REGION; APM GALAXY SURVEY; RICH CLUSTERS; UNIVERSE; PERIODICITY; CATALOG; MATTER SO - Astronomy & Astrophysics 2002 ;393(1):1-23 6703 UI - 10109 AU - Sabath E AU - Meade P AU - Vazquez N AU - Berkman J AU - Ellison DH AU - Gamba G AD - INCMNSZ, Mexico City, DF, MexicoUNAM, Mexico City, DF, MexicoOregon Hlth Sci Univ, Portland, OR 97201, USA TI - Characterization of functional mutations in Gitelman's disease MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757500368 SO - Journal of the American Society of Nephrology 2002 ;13():75A-76A 6704 UI - 11985 AU - Sabina FJ AU - Bravo-Castillero J AU - Guinovart-Diaz R AU - Rodriguez-Ramos R AU - Valdiviezo-Mijangos OC AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, Havana 4, CubaUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20-726,Delegac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Overall behavior of two-dimensional periodic composites AB - The overall properties of a binary elastic periodic fiber-reinforced composite are studied here for a cell periodicity of square type. Exact formulae are obtained for the effective stiffnesses, which give closed-form expressions for composites with isotropic components including ones for empty and rigid fibers. The new formulae are simple and relatively easy to compute. Examples show the dependences of the stiffnesses as a function of fiber volume fraction up to the percolation limit. The specific example of glass fibers in epoxy yields new curves, which correct those displayed before by Meguid and Kalamkarov. Comparison with experimental data is very good. Bruno, Hill and Hashin's bounds are compared with the exact solution. In most cases, the latter is very close to a bound in a given interval. A useful fact to know, where the easy formula afforded by the bound is advantageous. Plots of effective properties are also given for values of the shear moduli ratio of the two media. The overall parameters in the cases of empty and rigid fibers are also shown. The exact formulae explicitly display Avellaneda and Schwarts's micro structural parameters, which have a physical meaning, and provide formulae for them. The equations easily lead to Hill's universal relations. (C) 2001 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Mechanics U5 - J;Article AV - English IS - 0020-7683 UR - ISI:000173340700013 L2 - fiber-reinforced composites;isotropic components;empty fibers;rigid fibers;asymptotic homogenization;tetragonal symmetry;MICROSTRUCTURE SO - International Journal of Solids and Structures 2002 ;39(2):483-497 6705 UI - 10673 AU - Saenz-Romero C AU - Guries RP AD - Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706, USASaenz-Romero, C, Univ Michoacana San Nicolas de Hidalgo, Adm La Colina, Inst Invest Recuros Nat, Apartado Postal 12, Morelia 58141, Michoacan, Mexico TI - Landscape genetic structure of Pinus banksiana: Seedling traits AB - The extent and patterning of genetic diversity at a landscape scale (30 km x 30 km) was investigated using seedlings from 47 stands of Pinus banksiana LAMB. collected in a pine-oak barrens in west-central Wisconsin, USA. Seedlings grown for six months in a greenhouse were evaluated for the number of cotyledons, the length of the longest cotyledon, the number of early needle fascicles, seedling height, timing of bud set, and the dry weight of roots, foliage, stern and total seedling, shoot:root ratio and foliage:root ratio. A pronounced genetic structure exists for most traits, with stands showing significant differentiation at geographic distances up to 25 km. Seedlings originating from trees growing on sandy sites were larger than those from sandy-loam sites. The scale and pattern of differentiation for several traits parallels the scale and pattern of soil variation on the landscape, supporting the hypothesis that stand genetic differentiation corresponds to a gradient of environmental differences. The combined effect of soil texture, drainage and ground-water influence, apparently are the primary selective forces influencing among-stand genetic differentiation for the traits under study within this landscape. The results could be useful in a program of genetic resource management MH - Mexico|Michoacan MH - USA PB - FRANKFURT: J D SAUERLANDERS VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Forestry;Genetics & Heredity U5 - J;Article AV - English IS - 0037-5349 UR - ISI:000176867000005 L2 - landscape;genetic variation;genetic differentiation;quantitative traits;Pinus banksiana;spatial statistics;autocorrelation;kriging;forest gene conservation;HEIGHT GROWTH COMPONENTS; JACK PINE; DOUGLAS-FIR; POPULATION DIFFERENTIATION; MOSAIC ENVIRONMENT; CONTORTA; OREGON; ARCHITECTURE; GENECOLOGY; SOUTHWEST SO - Silvae Genetica 2002 ;51(1):26-35 6706 UI - 10086 AU - Saenz A AU - Montero ML AU - Castano VM AD - Univ Costa Rica, Escuela Fis, San Jose 2060, Costa RicaUniv Costa Rica, CICIMA, San Jose 2060, Costa RicaUniv Autonoma Estado Morelos, Cuernavaca, Morelos, MexicoUniv Costa Rica, Escuela Quim, San Jose 2060, Costa RicaUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, Qro, MexicoSaenz, A, Univ Costa Rica, Escuela Fis, San Jose 2060, Costa Rica TI - Hydroxyapatite coatings on metals of orthopedic interest AB - Hydroxyapatite coatings on metallic surfaces of orthopedic interest are achieved, with a chemical bond metal-hydroxyapatite established by the chemical process known as functionalizing. Two different functionalizing agents were used and the pH of the solutions was varied. Results show that crystal size and morphology depend on pH MH - Costa Rica MH - Mexico|Morelos MH - Mexico|Queretaro PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400037 L2 - PHOSPHATE; INGROWTH SO - Surface Review and Letters 2002 ;9(5-6):1795-1798 6707 UI - 10087 AU - Saenz A AU - Montero ML AU - Castano VM AD - Univ Costa Rica, Escuela Fis, San Jose 2060, Costa RicaUniv Costa Rica, CICIMA, San Jose 2060, Costa RicaUniv Autonoma Estado Morelos, Cuernavaca, Morelos, MexicoUniv Costa Rica, Escuela Quim, San Jose 2060, Costa RicaUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, Qro, MexicoSaenz, A, Univ Costa Rica, Escuela Fis, San Jose 2060, Costa Rica TI - Silica-hydroxyapatite nanometric composites grown at boiling water temperature AB - Silica-hydroxyapatite composites have been produced with a novel method. Particle size can be selected by the pH of the solution as well as crystallite morphology which also depends on pH. An ion reservoir is built by means of the complex solution Ca/EDTA (ethylenediaminetetra-acetic acid). The formation of hydroxyapatite (HAp) at low temperatures (boiling water) and in short periods of time (around 4 h) is achieved. It is thought that the production of silica promotes the nucleation of hydroxyapatite MH - Costa Rica MH - Mexico|Morelos MH - Mexico|Queretaro PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400038 SO - Surface Review and Letters 2002 ;9(5-6):1799-1802 6708 UI - 11240 AU - Saenz A AU - Montero ML AU - Castano VM AD - Univ Costa Rica, CICIMA, San Jose, Costa RicaUniv Costa Rica, Escuela Fis, San Jose, Costa RicaUniv Autonoma Estado Morelos, Mexico City, DF, MexicoUniv Costa Rica, Escuela Quim, San Jose, Costa RicaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoSaenz, A, Univ Costa Rica, CICIMA, San Jose, Costa Rica TI - Preparation of silica-hydroxyapatite nanometric composites AB - Composites of hydroxyapatite with silica are produced in a novel way. Using EDTA, a reservoir of calcium ions is made available and mixed with a sol typically used in the sol-gel technique. This allows the formation of the composite by refluxing. Size and morphology change with the pH of the reaction MH - Costa Rica MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000175278300014 L2 - PHOSPHATE SO - Physica Status Solidi B-Basic Research 2002 ;230(2):347-350 6709 UI - 11164 AU - Sagar RP AU - Ramirez JC AU - Esquivel RO AU - Ho M AU - Smith VH AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City, DF, MexicoQueens Univ, Dept Chem, Kingston, ON K7L 3N6, CanadaSagar, RP, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Apartado Postal 55-534, Mexico City, DF, Mexico TI - Relationships between Jaynes entropy of the one-particle density matrix and Shannon entropy of the electron densities AB - Relationships between the Jaynes and Shannon information entropies, both of which are related to the correlation energy, are given and the physical implications are explored. Evidence is provided from a study of the Be and Ne isoelectronic sequences that the Shannon entropy is more sensitive to the effects of the nuclear charge than is the Jaynes entropy. It is shown that the Jaynes entropy may be considered as the difference between the mean orbital Shannon entropy per electron and the mean orbital Shannon entropy of one electron. These mean orbital entropies display the same functional behavior as the total Shannon entropy throughout the isoelectronic sequence. We demonstrate that the Jaynes entropy may be considered as the sum of the Kullback-Leibler distance entropies occurring between natural spin orbital densities and a reference point whose occupation number is one. The large Z asymptotic behavior of the Jaynes and Shannon entropies is discussed. From a study of a Ne isonuclear sequence, it is shown that both Shannon and Jaynes entropies increase with the number of electrons, illustrating that these quantities are sensitive to the amount of electronic interactions present in the system. Relationships for the changes in the Shannon and Jaynes entropies with respect to the number of electrons for an isonuclear sequence are obtained, which depend on the electron affinity, first and second ionization potentials, and the hardness and chemical potential of the system. (C) 2002 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000175487300010 L2 - ATOMIC INFORMATION ENTROPIES; MEAN EXCITATION-ENERGY; ISOELECTRONIC SEQUENCE; COLLINS CONJECTURE; MOMENTUM-SPACE; CHARGE-DENSITY; BERYLLIUM-ATOM; APPROXIMATION; EXPANSION; ORBITALS SO - Journal of Chemical Physics 2002 ;116(21):9213-9221 6710 UI - 12113 AU - Sagastegui-Rodriguez JA AU - Cruz-Flores S AD - Univ Autonoma Nuevo Leon, Monterrey, MexicoSt Louis Univ, St Louis, MO 63110, USASagastegui-Rodriguez, JA, Univ Autonoma Nuevo Leon, Monterrey, Mexico TI - Syringomyelia MH - Mexico|Nuevo Leon MH - USA PB - WALTHAM: MASSACHUSETTS MEDICAL SOC/NEJM RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0028-4793 UR - ISI:000173033600007 SO - New England Journal of Medicine 2002 ;346(1):E1-E1 6711 UI - 10388 AU - Sagols F AU - Riccio LP AU - Colbourn CJ AD - Arizona State Univ, Dept Comp Sci & Engn, Tempe, AZ 85287, USAUniv Calif Berkeley, Dept Math, Berkeley, CA 94720, USACINVESTAV, Dept Elect Engn, Mexico City 14000, DF, Mexico TI - Dominated error correcting codes with distance two AB - We study the hamiltonicity of certain graphs obtained from the hypercube as a means of producing a binary code of distance two and length n, whose codewords are ordered so that for each two consecutive codewords, one dominates the other. One vector dominates the other, if and only if, in all the positions where one of them has a zero, the other has a zero too. These dominated codes have applications in group testing for consecutive defectives. We also determine when the vectors can be ordered so that every two consecutive vectors have the domination property, and are at distance two; this is a natural generalization of Gray codes. (C) 2002 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 1063-8539 UR - ISI:000177657200002 L2 - error correcting code;hamiltonian cycle;nonadaptive group testing;PARITY DIFFERENCE SO - Journal of Combinatorial Designs 2002 ;10(5):294-302 6712 UI - 11771 AU - Sagols F AU - Colbourn CJ AD - CINVESTAV, Elect Engn, Mexico City 14000, DF, MexicoUniv Vermont, Burlington, VT 05405, USA TI - NS1D0 sequences and anti-Pasch Steiner triple systems AB - We present an algorithmic construction of anti-Pasch Steiner triple systems for orders congruent to 9 mod 12. This is a Bose-type method derived from a particular type of 3-triangulations generated from non-sum-one-difference-zero sequences (NS1D0 sequences). We introduce NS1D0 sequences and describe their basic properties; in particular we develop an equivalence between the problem of finding NS1D0 sequences and a variant of the n-queens problem. This equivalence, and an algebraic characterization of the NS1D0 sequences that produce anti-Pasch Steiner triple systems, form the basis of our algorithm MH - Mexico|Distrito Federal MH - USA PB - WINNIPEG: CHARLES BABBAGE RES CTR RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0381-7032 UR - ISI:000173922800002 SO - Ars Combinatoria 2002 ;62():17-31 6713 UI - 9774 AU - Sala E AU - burto-Oropeza O AU - Paredes G AU - Parra I AU - Barrera JC AU - Dayton PK AD - Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093, USAUniv Autonoma Baja California, La Paz, Baja Calif Sur, MexicoWorld Wildlife Fund, Gulf Calif Program, Hermosillo, Sonora, MexicoSala, E, Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093 USA TI - A general model for designing networks of marine reserves AB - There is debate concerning the most effective conservation of marine biodiversity, especially regarding the appropriate location, size, and connectivity of marine reserves. We describe a means of establishing marine reserve networks by using optimization algorithms and multiple levels of information on biodiversity, ecological processes (spawning, recruitment, and larval connectivity), and socioeconomic factors in the Gulf of California. A network covering 40% of rocky reef habitat can fulfill many conservation goals while reducing social conflict. This quantitative approach provides a powerful tool for decision-makers tasked with siting marine reserves MH - USA MH - Mexico|Baja California Sur MH - Mexico|Sonora PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 67 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000179629200045 L2 - REEF FISHES; CONNECTIVITY; MANAGEMENT; POPULATION; RETENTION; HABITAT SO - Science 2002 ;298(5600):1991-1993 6714 UI - 11592 AU - Salamanca I AU - Terlevich RJ AU - Tenorio-Tagle G AD - Leiden Observ, NL-2300 RA Leiden, NetherlandsUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoSalamanca, I, Leiden Observ, Postbus 9513, NL-2300 RA Leiden, Netherlands TI - The circumstellar material around SNIIn 1997eg: another detection of a very narrow P Cygni profile AB - We report the detection of a very narrow P Cygni profile on top of the broad emission Halpha and Hbeta lines of the Type IIn Supernova 1997eg. A similar feature has been detected in SN 1997ab, SN 1998S and SN 1995G. The detection of the narrow P Cygni profile indicates the existence of a dense circumstellar material (CSM), into which the ejecta of the supernova is expanding. From the analysis of the spectra of SN 1997eg we deduce (i) that such CSM is very dense (n greater than or similar to 5 x 10(7) cm(-3)), (ii) that it has a low expanding velocity of about 160 km s(-1). The origin of such dense CSM can be either a very dense progenitor wind ((M)over dot similar to 10(-2) M-circle dot yr(-1)) or a circurnstellar shell product of the progenitor wind expanding into a hi ghpressure environment MH - United Kingdom MH - Mexico|Puebla MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000174426800009 L2 - line : profiles;circumstellar matter;ISM : individual : SN 1997eg;supernova remnants;ACTIVE GALACTIC NUCLEI; STARBURST MODEL; II SUPERNOVAE; EMISSION SO - Monthly Notices of the Royal Astronomical Society 2002 ;330(4):844-854 6715 UI - 9950 AU - Salas IIR AU - Paz-Sandoval MA AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyPaz-Sandoval, MA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Synthesis, structure, spectroscopy, and reactivity of half-open rhodocenium and iridocenium with oxodienyl ligands AB - The syntheses of the oxopentadienyl complex [Cp*Rh(eta(5)-CH2C(Me)CHC(Me)O)][BF4] (6) and the iridaoxabenzene [Cp*IrAg2(mu(2)-OPF2O)(2)(1,5-eta-CHC(CMe3)CHC(CMe3)O)] (9) are reported. Compound 9 is an organometallic polymer, formed in competition with complex [(Cp*Ir)(2)(mu(2)-OPF2O)(3)][PF6] (8). Treatment of [Cp*MCl2](2) (M = Rh, Ir) with lithium 2-methyl-4-oxopentadienide produces Cp*M(Cl)[eta(3)-CH2C(Me)CHC(Me)(O)] (M = Ir, 7; Rh, 10). H-1 and C-13 NMR, as well as IR spectra, indicate that the ligand acts as an eta(3)-oxodienyl group with an exo-syn conformation. The addition of phosphines, PR3 (R = Ph, Me or PR3 = PHPh2), in acetone to compound [Cp*Ir(eta(5)-CH2C(Me)CHC(Me)O)][PF6] (1) led to the formation of isomers [Cp*Ir(1,5-eta-CH2C(Me)CHC(Me)O)(L)][PF6] [L = PMe3, 11; PPh3, 15] and [Cp*Ir(eta(3)-CH2C-(Me)CHC(Me)O)L] [PF6] [L = PMe3, 12; PHPh2, 14; PPh3, 16]. The 1,5-eta and the eta(3) isomers are the kinetic and thermodynamic products, respectively. The addition of phosphines PR3 (R = Me, Ph) in methylene chloride to compound 6 led to the formation of compounds [Cp*Rh-(eta(3)-CH2C(Me)CHC(Me)O)(L)] [BF4] [L = PMe3, 18; PPh3, 20]. Compounds 18, 20, and [Cp*Rh-(eta(3)-CH2C(Me)CHC(Me)O)(PHPh2)] [OTf] (21) can also be obtained by adding the corresponding phosphine to compound 10, followed by the addition of AgOTf. The addition at room temperature of acetonitrile to compound 1 led to the formation of [Cp*Ir(eta(3)-CH2C(Me)CHC-(Me)O)(NCMe)] [PF6] (22), with an exo-anti conformation of the oxodienyl ligand. Facile dissociation of MeCN became evident. The exo-anti isomer structure of 22 has unequivocally been established by an X-ray diffraction study. The analogous rhodium exo-syn isomer [Cp*Rh(eta(3)-CH2C(Me)CHC(Me)O)(NCMe)][BF4] (23) has been established by H-1 and C-13 NMR spectroscopy. Exo-anti and exo-syn preferences have been established for all synthesized rhodium and iridium compounds. Compounds 1 and 6 did not suffer oxidative addition with SnCl4 and I-2. With I-2 the bridged iodine compounds [(Cp*M)(2)(mu(2)-I)(3)][X] (M = Ir, X = PF6, 25; M = Rh, X = BF4, 26) were obtained. Crystal structures for iridium compounds 1, 9, 22, and 25 and rhodium compounds 6, 10, 18, and [Cp*Rh(eta(3)-CH2C(Me)CHC(Me)O)(H2O)][BF4] (24) are described MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000178778100018 L2 - IRIDIUM-PHOSPHINE CHEMISTRY; H BOND ACTIVATION; X-RAY STRUCTURE; ETA-3-ALLYL ETHYLENE COMPLEXES; PENTAMETHYLCYCLOPENTADIENYL-RHODIUM; CRYSTAL-STRUCTURE; AROMATIC-COMPOUNDS; CONTAINING IRIDACYCLES; NUCLEOPHILIC-ADDITION; SILVER(I) COMPLEXES SO - Organometallics 2002 ;21(22):4696-4710 6716 UI - 10647 AU - Salas NS AU - Velasco S AU - Hernandez AC AD - Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoSalas, NS, Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, Spain TI - Unified working regime of irreversible Carnot-like heat engines with nonlinear heat transfer laws AB - We present the results of efficiency and power output for irreversible Carnot-like heat engines with nonlinear inverse, Dulong-Petit and Stefan-Boltzmann heat transfer laws when optimized with a recent criterion. A unified working regime is found intermediate between those predicted by the maximum efficiency and maximum power for all realistic values of the parameters accounting for the irreversibilities: finite rate heat transfer between the working fluid and the external heat sources, internal dissipation in the working fluid, and heat leak between reservoirs. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Thermodynamics;Energy & Fuels;Mechanics;Physics, Nuclear U5 - J;Article AV - English IS - 0196-8904 UR - ISI:000177073600006 L2 - power plants;optimization;nonlinear heat transfer laws;ENDOREVERSIBLE THERMAL ENGINES; ECOLOGICAL OPTIMIZATION CRITERION; GENERAL PROPERTY; PERFORMANCE; CYCLES SO - Energy Conversion and Management 2002 ;43(17):2341-2348 6717 UI - 10749 AU - Salas NS AU - Hernandez AC AD - Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, SpainSalas, NS, IPN, Escuela Super Fis & Matemat, Dept Fis, Edif 9, Mexico City 07738, DF, Mexico TI - Nonlinear systems rectifying thermal fluctuations: maximum power and maximum efficiency regimes AB - We present the optimal performance of nonlinear systems rectifying thermal fluctuations considering the power and efficiency as objective functions. We also obtain the behaviour of the power-efficiency curves of these mesoscopic systems. This behaviour is analysed and discussed in relation with previous results reported for macroscopic heat engine models in classical thermodynamics, some biological steady models using linear irreversible thermodynamics, and the Feynman's ratchet. Interestingly, we find a unified qualitative behaviour of power and efficiency versus an appropriate independent variable for all considered heat engines, independent of its nature MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000176818900025 L2 - ENGINE; OPTIMIZATION; RATCHET; OUTPUT SO - Journal of Physics D-Applied Physics 2002 ;35(12):1442-1446 6718 UI - 9796 AU - Salceda E AU - Garateix A AU - Soto E AD - Univ Autonoma Puebla, Inst Fisiol, Puebla 72001, MexicoMinist Ciencia Tecnol & Medio Ambieute, Inst Oceanol, Havana, CubaSalceda, E, Univ Autonoma Puebla, Inst Fisiol, Apartado Postal 406, Puebla 72001, Mexico TI - The sea anemone toxins BgII and GgIII prolong the inactivation time course of the tetrodotoxin-sensitive sodium current in rat dorsal root ganglion neurons AB - We have characterized the effects of BgII and BgIII, two sea anemone peptides with almost identical sequences (they only differ by a single amino acid), on neuronal sodium currents using the whole-cell patch-clamp technique. Neurons of dorsal root ganglia of Wistar rats (P5-9) in primary culture (Leibovitz's L15 medium; 37degreesC, 95% air/5% CO2) were used for this study (n = 154). These cells express two sodium current subtypes: tetrodotoxin-sensitive (M-S; K-i = 0.3 nM) and tetroclotoxin-resistant (TTX-R; K-i = 100 muM). Neither BgII nor BgIII had significant effects on TTX-R sodium current. Both BgII and BgIII produced a concentration-dependent slowing of the TTX-S sodium current inactivation (IC50 = 4.1 +/- 1.2 and 11.9 +/- 1.4 muM, respectively), with no significant effects on activation time course or current peak amplitude. For comparison, the concentration-dependent action of Anemonia sulcata toxin II (ATX-II), a well characterized anemone toxin, on the TTX-S current was also studied. ATX-II also produced a slowing of the TTX-S sodium current inactivation, with an IC50 value of 9.6 +/- 1.2 muM indicating that BgII was 2.3 times more potent than ATX-II and 2.9 times more potent than BgIII in decreasing the inactivation time constant (tau(h)) of the sodium current in dorsal root ganglion neurons. The action of BgIII was voltage-dependent, with significant effects at voltages below -10 mV. Our results suggest that BgII and BgIII affect voltage-gated sodium channels in a similar fashion to other sea anemone toxins and a-scorpion toxins MH - Cuba MH - Mexico|Puebla PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 14 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0022-3565 UR - ISI:000179290500024 L2 - ALPHA-SCORPION TOXIN; BUNODOSOMA-GRANULIFERA; IONIC CURRENTS; FUNCTIONAL-ANATOMY; SENSORY NEURONS; CHANNEL; RESIDUES; CELLS; NEUROTOXINS; MODULATION SO - Journal of Pharmacology and Experimental Therapeutics 2002 ;303(3):1067-1074 6719 UI - 11601 AU - Saldivar E AU - Araujo O AU - Giudici R AU - Guerrero-Sanchez C AD - Cid, GIRSA, Lerma, MexicoRhodia SA, Usina Quim Paulinia, BR-13140000 Sao Paulo, BrazilUniv Sao Paulo, Dept Engn Quim, BR-05424970 Sao Paulo, BrazilSaldivar, E, Cid, GIRSA, Av Sauces 87,Mza6, Lerma, Mexico TI - Modeling and experimental studies of emulsion copolymerization systems. III. Acrylics AB - Using a previously published model and continuing the series of papers started with styrenic copolymers, predictions for evolution of conversion and average particle diameter in batch experiments are compared against experimental data for four emulsion copolymerizations involving at least one acrylic monomer: (1) methyl methacrylate/butyl acrylate, (2) methyl methacrylate/butadiene, (3) methyl methacrylate-vinyl acetate, and (4) butyl acrylate/vinyl acetate. For each system a fraction of factorial experiments were run covering simultaneous variations in five variables: initiator [11 and surfactant [E] concentrations, water to monomer ratio (W/M), monomer composition, and temperature. Data fitting is performed to represent the experimental data as several parameters are not available from independent experimental sources. The model is able to explain the effects of simultaneous changes in emulsifier concentration, initiator concentration, and water to monomer ratio on conversion and average particle size histories, although in some cases only qualitatively. An assessment of the degree in which a general emulsion copolymerization model is useful for practical applications is made. Physical insight is also gained by observing the trends of adjusted parameters with temperature and copolymer composition. (C) 2002 Wiley Periodicals, Inc MH - Brazil MH - Mexico|Estado De Mexico PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000174468700002 L2 - emulsion copolymerization;mathematical modeling;ACETATE-BUTYL ACRYLATE; METHYL-METHACRYLATE; VINYL-ACETATE; CO-POLYMERIZATION; POLY(METHYL METHACRYLATE); MIXED EMULSIFIERS; CALORIMETRIC DATA; DYNAMIC BEHAVIOR; REACTORS; BATCH SO - Journal of Applied Polymer Science 2002 ;84(7):1320-1338 6720 UI - 9848 AU - Salin-Pascual RJ AU - Upadhyay U AU - Shiromani PJ AD - Vet Adm Med Ctr W Roxbury, Boston, MA 02132, USAHarvard Univ, Sch Med, Boston, MA 02132, USAUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoShiromani, PJ, Vet Adm Med Ctr W Roxbury, 1400 VFW Pkwy, Boston, MA 02132 USA TI - Effects of hypocaloric diet on sleep in young and old rats AB - Aging produces a loss in a number of behavioral and cognitive functions, including sleep. Hypocaloric diet is one of the few methods that have been shown to retard the effects due to age. However, the effects of such a diet on sleep have never been investigated. In the present study, 21 months old male F344 rats fed a 60% calorie-reduced diet continued to have a significant reduction in delta power (0.3-4 Hz EEG), less sleep following 12 It total sleep deprivation (TSD) and increased sensitivity to caffeine compared to young rats (3 months) fed a similar diet. These results indicate that caloric restriction is unable to prevent the decline in sleep that occurs with aging. (C) 2002 Elsevier Science Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Geriatrics & Gerontology;Neurosciences U5 - J;Article AV - English IS - 0197-4580 UR - ISI:000179231800017 L2 - hypocaloric diet;calorie;aging;sleep;rapid eye movement sleep;AGE-RELATED-CHANGES; CALORIC RESTRICTION; DEPENDENT CHANGES; RECEPTOR-BINDING; HUMAN NARCOLEPSY; GENE-EXPRESSION; WAKEFULNESS; CORTEX; HIPPOCAMPUS; DISORDERS SO - Neurobiology of Aging 2002 ;23(5):771-776 6721 UI - 10788 AU - Salinas-Garcia JR AU - Velazquez-Garcia JD AU - Gallardo-Valdez A AU - az-Mederos P AU - Caballero-Hernandez F AU - Tapia-Vargas LM AU - Rosales-Robles E AD - Inst Nacl Invest Forestales Agr & Pecuarias, Ctr Invest Reg Noreste, Tamaulipas, MexicoInst Nacl Invest Forestales Agr & Pecuarias, Ctr Invest Reg Noreste, Morelia, Michoacan, MexicoSalinas-Garcia, JR, Inst Nacl Invest Forestales Agr & Pecuarias, Ctr Invest Reg Noreste, POB 70, Progreso, TX 78579 USA TI - Tillage effects on microbial biomass and nutrient distribution in soils under rain-fed corn production in central-western Mexico AB - Quantifying how tillage systems affect soil microbial biomass and nutrient cycling by manipulating crop residue placement is important for understanding how production systems can be managed to sustain long-term soil productivity. Our objective was to characterize soil microbial biomass, potential N mineralization and nutrient distribution in soils (Vertisols, Andisols, and Alfisols) under rain-fed corn (Zea mays L.) production from four mid-term (6 years) tillage experiments located in central-western, Mexico. Treatments were three tillage systems: conventional tillage (CT), minimum tillage (MT) and no tillage (NT). Soil was collected at four locations (Casas Blancas, Morelia, Apatzingan and Tepatitlan) before corn planting, at depths of 0-50, 50-100 and 100-150 mm. Conservation tillage treatments (MT and NT) significantly increased crop residue accumulation on the soil surface. Soil organic C, microbial biomass C and N, potential N mineralization, total N, and extractable P were highest in the surface layer of NT and decreased with depth. Soil organic C, microbial biomass C and N, total N and extractable P of plowed soil were generally more evenly distributed throughout the 0-150 mm depth. Potential N mineralization was closely associated with organic C and microbial biomass. Higher levels of soil organic C, microbial biomass C and N, potential N mineralization, total N, and extractable P were directly related to surface accumulation of crop residues promoted by conservation tillage management. Quality and productivity of soils could be maintained or improved with the use of conservation tillage. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - Mexico|Tamaulipas MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Soil Science U5 - J;Article AV - English IS - 0167-1987 UR - ISI:000176641700006 L2 - tillage;soil organic carbon;microbial biomass;nutrient distribution;Mexico;WHEAT MANAGEMENT-SYSTEMS; ORGANIC-MATTER DYNAMICS; NO-TILLAGE; NITROGEN-FERTILIZATION; PHYSICAL-PROPERTIES; SEASONAL-CHANGES; MINERALIZABLE-C; CARBON; AGGREGATION; RESIDUE SO - Soil & Tillage Research 2002 ;66(2):143-152 6722 UI - 10206 AU - Salinas-Zavala CA AU - Douglas AV AU - Diaz HF AD - BCS, CIBNOR, La Paz, MexicoCreighton Univ, Dept Atmospher Sci, Omaha, NE 68178, USANOAA, ERL, CDC, Boulder, CO 80303, USASalinas-Zavala, CA, BCS, CIBNOR, POB 128, La Paz, Mexico TI - Interannual variability of NDVI in northwest Mexico. Associated climatic mechanisms and ecological implications AB - The relation between the Normalized Difference Vegetation Index (NDVI) interannual variability, precipitation and atmospheric circulation at 700 mbar in northwest Mexico is analyzed during the warm and cold phases of the El Nino Southern Oscillation (ENSO). A conditional probability test was conducted between this phenomenon and NDVI values. It was found that the negative ENSO phase is associated with drought conditions with a delay of 4 - 6 months related to the start of event, while the positive phase is related to high NDVI values during the driest season in the region. Clustering the NDVI values by terciles, it was determined that summers with high NDVI values are related to an intensification of the Mexican summer monsoon; while, in dry summers, the flow is characterized by the presence of an enhanced ridge of high-pressure aloft over most of the national territory. In winters with high NDVI values, a very intense low-pressure trough induces a meridional flow with penetration of humid air associated with frontal activity. This circulation pattern is common during the ENSO warm phase. Winters with low NDVI are associated atmospheric circulation patterns typical of the so-called Pacific North American (PNA) type. Based on the bio-seasonality and precipitation modulation in northwest Mexico due to the ENSO, it is concluded that the delay of a few months observed in NDVI values with respect to precipitation inputs supports the Seed Hydration Memory (SHM) concept. The ecological implications of this phenomenon for the region are also discussed. (C) 2002 Published by Elsevier Science Inc MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences;Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0034-4257 UR - ISI:000178123800020 L2 - VEGETATION; OSCILLATION; DROUGHT SO - Remote Sensing of Environment 2002 ;82(2-3):417-430 6723 UI - 10844 AU - Sanchez-Brambila GY AU - Lyon BG AU - Huang YW AU - Santiago JRF AU - Lyon CE AU - Gates KW AD - ARS, USDA, RRC, Athens, GA 30604, USACIAD, Hermosillo 83000, Sonora, MexicoUniv Georgia, Dept Food Sci & Technol, Athens, GA 30602, USACSL, Cooperat Calif San Ignacio, Bahia Asuncion, Baja California, MexicoUniv Georgia, Marine Extens Serv, Brunswick, GA 31522, USALyon, BG, ARS, USDA, RRC, POB 677, Athens, GA 30604, USA TI - Sensory and texture quality of canned whelk (Astraea undosa) subjected to tenderizing treatments AB - Whelk (Astraea undosa), treated with 0.25% papain solution infused by tumbling for 5, 10, or 20 min before canning, was compared to commercial abalone (standard) and untreated canned whelk (control) for sensory and texture characteristics. Treated whelk samples showed changes in sweetness and bitterness. Opercular muscle treated with papain for 10 or 20 min had lower sensory hardness, springiness and chewiness than untreated canned whelk. Instrumental texture analysis (TPA) indicated opercular muscle with 20 min papain treatment had lower hardness and chewiness compared to untreated whelk. Thus, papain treatment demonstrated the feasibility of improvement of canned whelk eating quality by reducing hardness and chewiness MH - Mexico|Baja California MH - Mexico|Sonora MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000176422000047 L2 - whelk;papain;hardness;chewiness;shear force;BATILLUS-CORNUTUS MUSCLE SO - Journal of Food Science 2002 ;67(4):1559-1563 6724 UI - 11075 AU - Sanchez-Brambila GY AU - Lyon BG AU - Huang YW AU - Lyon CE AU - Gates KW AD - ARS, USDA, Richard B Russell Agr Res Ctr, Athens, GA 30604, USACtr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Georgia, Dept Food Sci & Technol, Athens, GA 30602, USAUniv Georgia, Marine Extens Serv, Brunswick, GA 31522, USALyon, BG, ARS, USDA, Richard B Russell Agr Res Ctr, POB 5677, Athens, GA 30604 USA TI - Sensory characteristics and instrumental texture attributes of abalones, Haliods fulgens and Cracherodii AB - Tenderization treatments of black abalone (Haliods cracherodii) were conducted using papain solutions (0.25% or 0.50%) with tumbling (10 or 20 min) prior to canning. The treated adductor and opercular (foot) muscle were evaluated by sensory and instrumental methods and compared to untreated black abalone, to untreated blue abalone (H. fulgens) and to commercially canned blue abalone. Treatment with papain did not significantly alter the texture of the abalone but did increase metallic and bitter character notes, possibly by releasing amino acids on protein degradation. Instrumental texture measurements correlated with sensory texture measurements and may aid in the establishment of quality parameters for canned abalone MH - USA MH - Mexico|Sonora PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000175794600059 L2 - Haliotis fulgens;H. cracherodii;shear force;hardness;chewiness SO - Journal of Food Science 2002 ;67(3):1233-1239 6725 UI - 10849 AU - Sanchez-Chapula JA AU - Navarro-Polanco RA AU - Culberson C AU - Chen J AU - Sanguinetti MC AD - Univ Utah, Eccles Inst Human Genet, Eccles Program Human Mol Biol & Genet, Salt Lake City, UT 84112, USAUniv Utah, Dept Med, Salt Lake City, UT 84112, USAUniv Utah, Dept Physiol, Salt Lake City, UT 84112, USAUniv Colima, Unidad Invest Carlos Mendez, Ctr Univ Invest Biomed, Colima 23000, MexicoMerck Res Labs, Mol Syst, W Point, PA 19486, USASanguinetti, MC, Univ Utah, Eccles Inst Human Genet, Eccles Program Human Mol Biol & Genet, 15 N 2030 E,Rm 4220, Salt Lake City, UT 84112 USA TI - Molecular determinants of voltage-dependent human ether-a-go-go related gene (HERG) K+ channel block AB - The structural determinants for the voltage-dependent block of ion channels are poorly understood. Here we investigate the voltage-dependent block of wild-type and mutant human ether-a-go-go related gene (HERG) K+ channels by the antimalarial compound chloroquine. The block of wild-type HERG channels expressed in Xenopus oocytes was enhanced as the membrane potential was progressively depolarized. The IC50 was 8.4 +/- 0.9 muM when assessed during 4-s voltage clamp pulses to 0 mV. Chloroquine also slowed the apparent rate of HERG deactivation, reflecting the inability of drug-bound channels to close. Mutation to alanine of aromatic residues (Tyr-652 or Phe-656) located in the S6 domain of HERG greatly reduced the potency of channel block by chloroquine (IC50 > 1 mM at 0 mV). However, mutation of Tyr-652 also altered the voltage dependence of the block. In contrast to wild-type HERG, block of Y652A HERG channels was diminished by progressive membrane depolarization, and complete relief from block was observed at +40 mV. HERG channel block was voltage-independent when the hydroxyl group of Tyr-652 was removed by mutating the residue to Phe. Together these findings indicate a critical role for Tyr-652 in voltage dependent block of HERG channels. Molecular modeling was used to define energy-minimized dockings of chloroquine to the central cavity of HERG. Our experimental findings and modeling suggest that chloroquine preferentially blocks open HERG channels by cation-pi and v-stacking interactions with Tyr-652 and Phe-656 of multiple subunits MH - Mexico|Colima MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 65 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000176475700064 L2 - LONG QT SYNDROME; CATION-PI INTERACTIONS; POTASSIUM CHANNEL; XENOPUS OOCYTES; RECEPTOR-SITE; VENTRICULAR MYOCYTES; CARDIAC-ARRHYTHMIA; CELL-LINE; DOFETILIDE; MECHANISM SO - Journal of Biological Chemistry 2002 ;277(26):23587-23595 6726 UI - 11814 AU - Sanchez-Chapula JA AU - Navarro-Polanco RA AU - Sanguinetti MC AD - Univ Colima, Colima 28041, MexicoUniv Utah, Salt Lake City, UT 84112, USA TI - Mechanism of HERG channel block by the antimalarial drug chloroquine MH - Mexico|Colima MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000173252702856 SO - Biophysical Journal 2002 ;82(1):581A-581A 6727 UI - 9295 AU - Sanchez-Garcia J AU - Smith DR AD - CICESE Res ctr, Elect & Telecommun Dept, Ensenada, Baja California, MexicoGeorge Washington Univ, Dept Elect & Comp Engn, SEAS, Washington, DC 20052, USASanchez-Garcia, J, CICESE Res ctr, Elect & Telecommun Dept, Ensenada, Baja California, Mexico TI - Capture probability in rician fading channels with power control in the transmitters AB - Capture probability for signals over Rician-fading channels (with equal mean power) is analyzed. Expressions for probability density function and cumulative distribution function for power of n interferers are derived, validating with a known expression for Rayleigh fading. These equations are applied to Slotted ALOHA, showing an increase in throughput MH - Mexico|Baja California MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0090-6778 UR - ISI:000180781200006 L2 - capture probability;indoor radio;Rayleigh fading;Rician fading;Slotted ALOHA;MOBILE; RADIO SO - Ieee Transactions on Communications 2002 ;50(12):1889-1891 6728 UI - 10376 AU - Sanchez-Gil JA AU - Garcia-Ramos JV AU - Mendez ER AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoSanchez-Gil, JA, CSIC, Inst Estructura Mat, Serrano 121, E-28006 Madrid, Spain TI - Electromagnetic mechanism in surface-enhanced Raman scattering from Gaussian-correlated randomly rough metal substrates AB - We investigate the electromagnetic mechanism in surface-enhanced Raman scattering (SERS) from randomly rough metal surfaces with Gaussian statistics and Gaussian correlation function. By means of rigorous numerical calculations, large average SERS enhancement factors ( above 10 4) a e encountered when the correlation length is of the order of (or lower than) a hundred nanometers, with excitation in the visible and near infrared. These Gaussian-correlated metal surfaces can be used as SERS substrates. Furthermore, local SERS enhancement factors are obtained of up to 10(8) that make them appropriate for resonant SERS single molecule (C) 2002 Optical Society of America MH - Mexico|Baja California MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000177630600004 L2 - LIGHT-SCATTERING; NANOPARTICLES; LITHOGRAPHY; NANOWIRES; MOLECULES; FILMS SO - Optics Express 2002 ;10(17):879-886 6729 UI - 11206 AU - Sanchez-Gil JA AU - Garcia-Ramos JV AU - Mendez ER AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoSanchez-Gil, JA, CSIC, Inst Estructura Mat, Serrano 121, E-28006 Madrid, Spain TI - Light scattering from self-affine fractal silver surfaces with nanoscale cutoff: far-field and near-field calculations AB - We study the light scattered from randomly rough, one-dimensional, self-affine fractal silver surfaces with nanoscale lower cutoff illuminated by s- or p-polarized Gaussian beams a few micrometers wide. By means of rigorous numerical calculations based on the Green's theorem integral equation formulation (GTIEF), we obtain both the far- and near-field scattered intensities. The influence of diminishing the size of the fractal lower-scale irregularities (from similar to50 nm to a few nanometers) is analyzed in the, case of both single realization and ensemble-average magnitudes. For s polarization, variations are small in the far field, being significant only in the higher-spatial-frequency components of evanescent character in the near field. In the case of p polarization, however, the nanoscale cutoff has remarkable effects stemming from the roughness-induced excitation of surface-plasmon polaritons. In the far field, the effect is noticed both in the speckle pattern variation and in the decrease of the total reflected energy upon ensemble averaging, as a result of increased absorption. In the near field, more efficient excitation of localized optical modes is achieved with smaller cutoff, which in turn leads to huge surface electric field enhancements. (C) 2002 Optical Society of America MH - Mexico|Baja California MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000175372100009 L2 - ENHANCED RAMAN-SCATTERING; ELECTROMAGNETIC-WAVE SCATTERING; ROUGH METAL-SURFACE; CORRUGATED SURFACES; 2ND-HARMONIC GENERATION; OPTICAL-EXCITATIONS; COLLOID CLUSTERS; THIN-FILMS; DIFFRACTION; BACKSCATTERING SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2002 ;19(5):902-911 6730 UI - 10411 AU - Sanchez-Guillen MD AU - Perez-Fuentes R AU - Salgado-Rosas H AU - Ruiz-Arguelles A AU - Ackers J AU - Shire A AU - Talamas-Rohana P AD - IMSS, Parasitol Lab, Ctr Invest Biomed Oriente, Puebla 72430, MexicoBUAP, Fac Med, Puebla 72000, MexicoLab Clin Puebla, Puebla 72000, MexicoUniv London London Sch Hyg & Trop Med, London WC1E 7HT, EnglandIPN, CINVESTAV, Dept Patol Expt, Mexico City 07360, DF, MexicoSanchez-Guillen, MD, IMSS, Parasitol Lab, Ctr Invest Biomed Oriente, 19 Sur 4717,Col Reforma Agua Azul, Puebla 72430, Mexico TI - Differentiation of Entamoeba histolytica/entamoeba dispar by PCR and their correlation with humoral and cellular immunity in individuals with clinical variants of amoebiasis AB - To correlate a particular state of immunity with Entamoeba spp., we used colorimetric PCR to differentiate E. histolytica from E. dispar in individuals with amoebiasis and to associate its presence with the clinical profile, including humoral and cellular immune responses to E. histolytica. Our results showed high levels of antibody in acute amoebiasis and elevation of IL-4 production, a cytokine related to Th2 profile, associated with E. histolytica. In chronic amoebiasis, even with anti-E. histolytica seropositivity, intestinal symptoms were associated with E. dispar in all the cases, without differences in level of antibodies, BTI, CD4+/CD8+ ratio, INF-gamma, and IL-4. Among asymptomatic carriers, E. dispar was more frequently found; however, identification of E. histolytica in two asymptomatic carriers associated with high levels of INF-gamma, a cytokine related to Th1 profile, demonstrate the importance of making specific diagnosis of Entamoeba spp., to establish the clinical and epidemiological behavior in both intestinal and extra-intestinal amoebiasis MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 10 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000177660700017 L2 - POLYMERASE CHAIN-REACTION; AMEBIC LIVER-ABSCESS; INTESTINAL AMEBIASIS; INTERLEUKIN-2 PRODUCTION; INTERFERON-GAMMA; PERIPHERAL-BLOOD; LYMPHOCYTE-T; IN-VIVO; INFECTION; DIAGNOSIS SO - American Journal of Tropical Medicine and Hygiene 2002 ;66(6):731-737 6731 UI - 12209 AU - Sanchez-Herencia AJ AU - Gutierrez CA AU - Millan AJ AU - Nieto MI AU - Moreno R AD - Inst Ceram & Vidrio, Madrid 28500, Spain. IPN, CINVESTAV, Unidad Saltillo, Saltillo 250000, Coahuila, Mexico. IUT Dr Federico Rivero Palacios, Dept Mat, Caracas, Venezuela TI - Colloidal forming of metal/ceramic composites AB - Metal/Ceramic composites have very attractive properties as either structural or electronic materials. For certain applications, complex microstructures and shapes are required. Colloidal processing of ceramics has proved to provide better properties and allows to obtain near net complex shaped parts. However colloidal processing has not received a similar attention in powder metallurgy, This work deals with the colloidal approach to the forming of metallic and metal/ceramic composites in an aqueous medium. Rheological behavior of concentrated pure nickel, nickel/alumina and nickel/zirconia suspensions is studied and optimized for obtaining flat surfaces or near net shaped parts by tape casting and gel casting respectively. In each case the influence of the processing additives (acrylic binders for tape casting and carrageenans for gel casting) on the rheological behavior of the slurries is determined. Pure nickel and nickel/ceramic composites with different compositions have been prepared, Static and dynamic sintering studies were performed at different conditions in order to control the porosity and microstructure of the final bodies, which were characterized by optical microscopy MH - Mexico|Coahuila MH - Spain MH - Venezuela T3 - EURO CERAMICS VIIKey engineering materials PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U4 - Materials Science, Ceramics; Materials Science, Composites U5 - S;Article NT - SEnglishArticle1BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDKEY ENG MATBT32X AV - English IS - 1013-9826 UR - ISI:000172651400058 L2 - cermet;colloidal processing;nickel;alumina;zirconia;tape casting;gel casting SO - 2002 ;():227-230 6732 UI - 9794 AU - Sanchez-Hernandez C AU - Romero-Almaraz MD AU - Cuisin J AD - Natl Autonomous Univ Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoMuseum Natl Hist Nat, Lab Mammiferes & Oiseaux, F-75005 Paris, FranceSanchez-Hernandez, C, Natl Autonomous Univ Mexico, Inst Biol, Dept Zool, AP 70-153, Mexico City 04510, DF, Mexico TI - Sturnira mordax (Chiroptera, Phyllostomidae), in Ecuador MH - France MH - Mexico|Distrito Federal PB - PARIS: MUSEUM NAT HIST NATURELLE RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0025-1461 UR - ISI:000179006600011 SO - Mammalia 2002 ;66(3):439-441 6733 UI - 9630 AU - Sanchez-Huerta L AU - Ayala G AU - Marroquin J AU - Calderon R AU - Silva-Gomez AB AU - Khotiaintsev KS AU - Degtiareva L AU - Khotiaintsev SN AU - Flores G AD - Univ Autonoma Puebla, Inst Fisiol, Puebla 72570, MexicoUniv Autonoma Puebla, Fac Ciencias Computac, Puebla, MexicoRes Inst Human Ecol, Kiev, UkraineUniv Nacl Autonoma Mexico, Fac Ingn, Mexico City 04510, DF, MexicoFlores, G, Univ Autonoma Puebla, Inst Fisiol, 14 Sur 6301, Puebla 72570, Mexico TI - Neonatal prefrontal cortex lesion using CO2 laser technique AB - Prefrontal cortex (PFC) is a large area of the brain and its neonatal lesion with ibotenic or kainic acid is used to study the early abnormalities in neurodevelopment that lead to behavioral changes linked to schizophrenia. However, these exitotoxic drugs produce a large and asymmetric damage in the PFC. We produced the bilateral lesions of the dorsal part of the PFC of neonatal Sprague-Dawley rats (postnatal day 7, P7) at the anteroposterior +2.5 mm and mediolateral +/-0.4 coordinates by the new laser technique that employ the confined radiation of the CO2 laser in the pulsed mode. The laser was used because its coherent radiation can be focused in a very small spot and as small as of several tens of micrometers in diameters. The CO, laser radiation is strongly absorbed by water that is present in any soft tissue. Thereafter, the configuration of the heated zone and, consequently, that of the lesion does not depend on the morphological non-homogeneity of particular structures. We obtained the symmetric, conical in shape and small-size bilateral lesions of the PFC. The size of the lesion depended on the beam spot-size and could be as small as several dozens of micrometers in diameter. Our data suggests that the laser technique will be used for the anatomical-functional studies of the PFC in the brain. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Biochemical Research Methods;Neurosciences U5 - J;Article AV - English IS - 1385-299X UR - ISI:000179818800003 L2 - prefrontal cortex;schizophrenia;animal model;laser;neurodevelopment;HOLLOW WAVE-GUIDES; EXCITOTOXIC LESIONS; FRONTAL LESIONS; RATS; RECOVERY; DOPAMINE; NUCLEUS; BRAIN SO - Brain Research Protocols 2002 ;10(2):69-74 6734 UI - 10682 AU - Sanchez-Loreda MG AU - Robledo-Cabrera A AU - Grote M AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Gesamthsch Paderborn, Dept Analyt Chem, D-33098 Paderborn, GermanySanchez-Loreda, MG, Univ Autonoma San Luis Potosi, Inst Met, Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Preparation of gold powders by means of redox-active extractive systems AB - Solvent extraction of gold by means of two S-decyldithizone derivatives was studied, where partial precipitation of the gold and oxidation of the extractants were observed. Gold was recovered from the loaded organic phases by reduction as fine particles, and the extractants could be reduced and fully regenerated. The efficiency of extractant regeneration increased with increasing ascorbic acid concentration. In the case of reduction with sodium borohydride, the best reduction efficiency was achieved by use of an alkaline borohydride solution. A scanning electron microscopy method has been used to characterise the precipitated gold powders. The presence of the carboxylic group on one of the aromatic rings of the substituted S-decyldithizone greatly influences the morphology and size of the produced metal particles. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|San Luis Potosi PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000176920200011 L2 - chemical synthesis;solvent extraction;gold ultrafine powders;SODIUM-BOROHYDRIDE; PRECIPITATION; REDUCTION SO - Materials Chemistry and Physics 2002 ;76(3):279-284 6735 UI - 10142 AU - Sanchez-Lozada LG AU - Tapia E AU - vila-Casado C AU - Soto V AU - Franco M AU - Santamaria J AU - Nakagawa T AU - Rodriguez-Iturbe B AU - Johnson RJ AU - Herrera-Acosta J AD - Inst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Pathol, Mexico City 14080, DF, MexicoBaylor Coll Med, Div Nephrol, Houston, TX 77030, USAUniv Zulia, Maracaibo 4011, VenezuelaUniv Hosp, Maracaibo, VenezuelaSanchez-Lozada, LG, Inst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Mild hyperuricemia induces glomerular hypertension in normal rats AB - Mildly hyperuricemic rats develop renin-dependent hypertension and interstitial renal disease. Hyperuricemia might also induce changes in glomerular hemodynamics. Micropuncture experiments under deep anesthesia were performed in Sprague-Dawley rats fed a low-salt diet (LS group), fed a low-salt diet and treated with oxonic acid (OA/LS group), and fed a low-salt diet and treated with oxonic acid + allopurinol (OA/LS/AP group) for 5 wk. The OA/LS group developed hyperuricemia and hypertension compared with the LS group: 3.1 +/- 0.2 vs. 1.1 +/- 0.2 mg/dl (P < 0.01) and 143 +/- 4 vs. 126 +/- 2 mmHg (P < 0.01). Hyperuricemic rats developed increased glomerular capillary pressure compared with the LS rats: 56.7 +/- 1.2 vs. 51.9 +/- 1.4 mmHg (P < 0.05). Pre- and postglomerular resistances were not increased. Histology showed afferent arteriolar thickening with increased α-smooth muscle actin staining of the media. Allopurinol prevented hyperuricemia (1.14 +/- 0.2 mg/ dl), systemic (121.8 +/- 2.8 mmHg) and glomerular hypertension (50.1 +/- 0.8 mmHg), and arteriolopathy in oxonic acid-treated rats. Linear regression analysis showed that glomerular capillary pressure and arteriolar thickening correlated positively with serum uric acid and systolic blood pressure. Glomerular hypertension may be partially mediated by an abnormal vascular response to systemic hypertension due to arteriolopathy of the afferent arteriole MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 62 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000178465500027 L2 - uric acid;arteriolopathy;renal hemodynamics;micropuncture;hypertension;XANTHINE-OXIDASE; SALT RESTRICTION; RENAL-DISEASE; INJURY; NEPHROPATHY; NEPHRECTOMY; SUPEROXIDE; MECHANISM; PRESSURE; KIDNEY SO - American Journal of Physiology-Renal Physiology 2002 ;283(5):F1105-F1110 6736 UI - 10063 AU - Sanchez-Martinez G AU - Wagner MR AD - No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011, USASanchez-Martinez, G, INIFAP, Campo Expt Pabellon,Km 32-5,Apdo Postal 20, Pabellon de Arteaga 20660, Ags, Mexico TI - Bark beetle community structure under four ponderosa pine forest stand conditions in northern Arizona AB - We studied the bark beetle guild (Coleoptera: Scolytidae) in the ponderosa pine forests of northern Arizona to explore if the species assemblages and relative abundance differ between managed and unmanaged stands. Four stand conditions were assessed: (1) unmanaged stands with high tree density, (2) thinned stands, (3) thinned and burned (with prescribed fire) stands and (4) stands that had been burned by stand replacing wildfires. The study was conducted in the ponderosa pine forests of the Coconino Plateau, northern Arizona. For several decades this area has been relatively free of bark beetle outbreaks despite the current overstocked condition of many stands. We found that a similar species assemblage composed of Dendroctonus frontalis, D. brevicomis, D. valens, A approximatus, D. ponderosae, and Ips pini occurred across all four stand conditions over 3 years of study. The population levels of all these species were endemic across all stand conditions. The non-aggressive D. approximatus and D. valens were indicator species for thinned and unmanaged stands, respectively, but this was not consistent among years. The ambrosia beetle Gnathotrichus sp. and the bark beetle predator Enoclerus sp. consistently indicated stands burned by wildfire. In addition to our field experiment, we analyzed the historical pattern of attacks of bark beetles in our area of study. Our findings suggest that the pattern of attack of D. brevicomis (the only Dendroctonus species for which attacks have been reported) and Ips spp. has been through scattered small infestations in groups of 1-10 trees. Whereas small infestations by Ips spp. are increasing, those for A brevicomis are decreasing. Although we agree that the high density stands in northern Arizona are in an "unhealthy" condition, our results do not show that they were supporting large bark beetle outbreaks. Our results challenge the theoretical assumptions about the relationship between stand structure, tree resistance and bark beetle performance. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Aguascalientes MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000178567000011 L2 - Ponderosa pine;bark beetles;Dendroctonus spp.;stand structure;forest health;indicator species;ECOSYSTEM ENGINEERS; GUILD COLEOPTERA; SCOLYTIDAE; RESISTANCE; AREA; LANDSCAPES; DYNAMICS; SYSTEMS SO - Forest Ecology and Management 2002 ;170(1-3):145-160 6737 UI - 11618 AU - Sanchez-Perez HJ AU - Hernan MA AU - Hernandez-Diaz S AU - Jansa JM AU - Halperin D AU - Ascherio A AD - Colegio Frontera Sur, Div Poblac & Salud, Dept Epidemiol & Publ Hlth, San Cristobal de las Casas 29290, Chiapas, MexicoHarvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115, USAInst Municipal Salud, Serv Epidemiol, Barcelona, SpainHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USASanchez-Perez, HJ, Colegio Frontera Sur, Div Poblac & Salud, Dept Epidemiol & Publ Hlth, Carretera Panamer & Perifer Sur S-N, San Cristobal de las Casas 29290, Chiapas, Mexico TI - Detection of pulmonary tuberculosis in Chiapas, Mexico AB - PURPOSE: To estimate the prevalence of undiagnosed pulmonary tuberculosis (PTB) and the sensitivity of bacilloscopy in the border region of Chiapas, Mexico, METHODS: We actively sought individuals aged 15 years or more with chronic cough from the Border Region of Chiapas, Mexico in three settings: One regional hospital, seven Primary Care Centers (PCC), and 32 communities. Individuals (a total of 899) reporting chronic cough were asked to provide three samples Of sputum for acid-fast smears and cultured. The quality of acid-fast smears was evaluated using culture as the gold standard. RESULTS: We obtained Sputum specimens from 590 of 899 individuals With chronic cough. A diagnosis of PTB was confirmed in 78. A conservative estimate Of the overall prevalence of PTB at the population level was 151 per 100,000 (95% Cl: 38 to 241). In the regional hospital, the estimated case detection rate was 66% (29/44). The proportion of candidates for PTB therapy that were actually on treatment was 50% (14/28) at the PCC and 11% (2/19) in the communities. The sensitivity of the bacilloscopy was about 90%, in the hospital, and slightly lower than 50% in the PCC and the communities. CONCLUSION: Improved procedures for PTB detection are required in the studied area to adequately control the disease and to provide therapy to affected patients. Ann Epidemiol 2002; 12:166-172, (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Chiapas MH - Spain MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1047-2797 UR - ISI:000174448900004 L2 - pulmonary tuberculosis;diagnosis;Mexico;WORLDWIDE SO - Annals of Epidemiology 2002 ;12(3):166-172 6738 UI - 9672 AU - Sanchez-Soto LL AU - Delgado J AU - Klimov AB AU - Bjork G AD - Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoRoyal Inst Technol KTH, Dept Microelect & Informat Technol, SE-16440 Kista, SwedenSanchez-Soto, LL, Univ Complutense, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, Spain TI - Description of entanglement in terms of quantum phase AB - We explore the role played by the phase in an accurate description of the entanglement of bipartite systems. We first present an appropriate polar decomposition that leads to a truly Hermitian operator for the phase of a single qubit. We also examine the positive operator-valued measures that can describe the qubit phase properties. When dealing with two qubits, the relative phase seems to be a natural variable to understand entanglement. In this spirit, we propose a measure of entanglement based on this variable MH - Mexico|Jalisco MH - Spain MH - Sweden PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000179502200022 L2 - CONJUGATE VARIABLES; RELATIVE PHASE; 2 QUBITS; STATE; GATE; REPRESENTATION; DISTRIBUTIONS; DIFFERENCE; ALGORITHM; UNIVERSAL SO - Physical Review A 2002 ;66(4): 6739 UI - 11671 AU - Sanchez-Valenzuela OA AU - Victoria-Monge C AD - CIMAT, Guanajuato 36000, MexicoUniv Politecn Catalunya, Dpt Mat Apl I Telem, Barcelona 08034, SpainSanchez-Valenzuela, OA, CIMAT, Apdo Postal 402,CP, Guanajuato 36000, Mexico TI - Colored Yang-Baxter operators and representations of the braid and symmetric groups AB - Let Delta be an abelian group, and let Delta be a Delta-graded algebra which is commutative with respect to a symmetric bicharacter epsilon: on Delta. Associated to any Delta-graded Delta-module M there is a tensor Delta-algebra colored by Delta with epsilon-compatible left and right A-module structures. It is proved that this tensor algebra comes equipped with a set of - up to a scalar-unique Yang-Baxter operators satisfying a specific set of natural conditions, by means of which nontrivial representations of the braid and symmetric groups are obtained. It is shown that, when M is freely generated by homogeneous elements, the submodule of invariant elements under the corresponding representation is also freely generated, and has a canonical epsilon-commutative algebra structure. Several symmetric-like and,exterior-like algebras in the literature can be obtained as examples of the so constructed algebras of invariant elements for particular choices of epsilon. Algebra endomorphisms induced in a functorial fashion from A-module endomorphisms of the original M are also obtained MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000174141200008 L2 - ALGEBRAS SO - Communications in Algebra 2002 ;30(2):631-651 6740 UI - 11672 AU - Sanchez-Valenzuela OA AU - Victoria-Monge C AD - CIMAT, Guanajuato 36000, MexicoUniv Politecn Catalunya, Dpt Mat Apl I Telem, Barcelona 08034, SpainSanchez-Valenzuela, OA, CIMAT, Apdo Postal 402,CP, Guanajuato 36000, Mexico TI - Quantum minors associated to Yang-Baxter operators AB - The graded algebra of invariant elements under the representations induced by the Yang-Baxter operators constructed in our previous work is used here to generalize the notion of minors associated to a matrix with coefficients in any E-commutative algebra A. We call them quantum minors to be reminded that they are obtained in a non commutative context. Quantum minors are elements of A appearing as coefficients of the algebra endomorphism induced on the graded algebra of invariant elements by a given A-module endomorphism. It turns out that quantum minors are multiplicative and satisfy a Laplace-like expansion. It is shown that the usual determinant, the various Z(2)-graded determinants, and the quantum and multiparametric quantum determinants are special cases of quantum minors, depending on the choice of the commutation factor epsilon MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000174141200009 SO - Communications in Algebra 2002 ;30(2):653-670 6741 UI - 10489 AU - Sanchez-Velasquez LR AU - Ezcurra E AU - Martinez-Ramos M AU - varez-Buylla E AU - Lorente R AD - Univ Guadalajara, Ctr Univ Costa Sur, Inst Manantlan, Lab Ecol Aplicada, Guadalajara 44430, Jalisco, MexicoSan Diego Nat Hist Museum, San Diego, CA 92101, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoSanchez-Velasquez, LR, Univ Veracruzana, Inst Genet Forestal, Parque Ecol Haya,AP 551, Xalapa 91000, Veracruz, Mexico TI - Population dynamics of Zea diploperennis, an endangered perennial herb: effect of slash and burn practice AB - 1 Zea diploperennis is a wild relative of maize that is endemic to the Sierra de Manantlan Biosphere Reserve in Mexico. Because this species is a priority for conservation in the reserve, the effects on its populations of the most common types of anthropogenic disturbance - slash-and-burn, and slash without subsequent burning - were investigated in three populations for 5 years. 2 The patterns of establishment and mortality were similar in all populations studied. Numbers of ears and fruits produced were significantly higher when disturbances were applied. 3 Because permanence is the most important stage in contributing to lambda, the results suggest that the first genets to become established have an advantage over newly recruited plants. 4 When the two disturbance types were applied, lambda was close to 1 or > 1. After the first disturbance, lambda increased by almost 100%. In almost all situations, with or without disturbance, the persistence loops of Z. diploperennis are the most important life history pathways in the relative contribution to lambda. In general, when lambda increases, sexual growth loops also increase in importance, and persistence loops decrease. Changes in lambda are not related to changes in vegetative growth loops. 5 If populations of Z. diploperennis are not disturbed at least once every 5 years, then species will go locally extinct in the wild MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Veracruz MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Ecology U5 - J;Article AV - English IS - 0022-0477 UR - ISI:000177368400010 L2 - demography;disturbances;loop analysis;teosinte;Zea diploperennis;LOOP ANALYSIS; FIRE; PLANTS; CONSERVATION; DEMOGRAPHY; VIABILITY; GRASS; ECOLOGY; MEXICO SO - Journal of Ecology 2002 ;90(4):684-692 6742 UI - 10690 AU - Sanchez A AU - Rotstein G AU - Alsop N AU - Bromberg JP AU - Gollain C AU - Sorensen S AU - Macchietto S AU - Jakeman C AD - Univ London Imperial Coll Sci Technol & Med, Ctr Proc Syst Engn, London SW7 2BY, EnglandSanchez, A, CINVESTAV, Dept Elect & Comp Engn, Apdo Postal 31-438, Guadalajara 44550, Jalisco, Mexico TI - Improving the development of event-driven control systems in the batch processing industry. A case study AB - This paper presents the results of an academia-industry collaborative project whose main objective was to test novel techniques for the development of event-driven control systems in the batch processing (e.g., pharmaceutical, fine chemicals, food) industries. Proposed techniques build upon industrial standards and focus on (i) formal synthesis of phase control logic and its automatic translation into procedural code, and (ii) verification of the complete discrete-event control system via dynamic simulation. In order to test the techniques in an engineering environment, a complete discrete-event control system was produced for a benchmark batch process plant based on a standard development method employed by one of the industrial partners. The control system includes functional process specification, control architecture, distributed control system (DCS) proprietary programming code for procedural control at equipment, unit, and process cell levels, and human-machine interfaces. A technical assessment of the development method and the obtained control system was then carried out. Improvements were suggested using the proposed techniques in the specification, code generation and, verification steps. The project assessed the impact of these techniques from both an engineering and economic point of view. Results suggest that the introduction of computer aided engineering (CAE) practices based on the benchmarked techniques and a structured approach could effect a 75% reduction of errors produced in the development process. This translates into estimated overall savings of 7% for green-field projects. Figures were compared with other partners' experience. It is expected that the work load on a given project will shift, increasing the load on process engineers during the specification stage and decreasing the load on the software engineers during the code writing. (C) 2002 ISA-The Instrumentation, Systems, and Automation Society MH - United Kingdom MH - Mexico|Jalisco PB - RES TRIANGLE PK: I S A-THE INSTRUMENTATION SYSTEMS AUTOMATION SOC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Multidisciplinary;Instruments & Instrumentation U5 - J;Article AV - English IS - 0019-0578 UR - ISI:000176911600007 L2 - batch process control;discrete-event systems;dynamic simulation;automation design economics;PROCEDURAL CONTROLLERS; IMPLEMENTATION; PLANT SO - Isa Transactions 2002 ;41(3):343-363 6743 UI - 11954 AU - Sanchez FJG AU - Ortiz-Conde A AU - Cerdeira A AU - Estrada M AU - Flandre D AU - Liou JJ AD - Univ Simon Bolivar, LEES, Caracas 1080A, VenezuelaIPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City 07300, DF, MexicoUniv Catholique Louvain, Microelect Lab, B-1348 Louvain, BelgiumUniv Cent Florida, Sch Elect Engn & Comp Sci, Orlando, FL 32816, USAHuazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R ChinaSanchez, FJG, Univ Simon Bolivar, LEES, Apartado Postal 89000, Caracas 1080A, Venezuela TI - A method to extract mobility degradation and total series resistance of fully-depleted SOI MOSFETs AB - Free-carrier mobility degradation in the channel and drain/source series resistance are two important parameters limiting the performance of MOS devices. In this paper, we present a method to extract these parameters from the drain current versus gate voltage characteristics of fully-depleted (FD) SOI MOSFETs operating in the saturation region. This method is developed based on an integration function which reduces errors associated with the extraction procedure and on the d.c. characteristics of MOS devices having several different channel lengths. Simulation results and measured data of FD SOI MOSFETs are used to test and verify the method developed MH - Belgium MH - Mexico|Distrito Federal MH - Peoples R China MH - USA MH - Venezuela PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9383 UR - ISI:000173338000014 L2 - mobility degradation;parameter extraction;series resistance;SOI MOSFETs;threshold voltage;velocity saturation;CURRENT-CONDUCTANCE METHOD; PARAMETER EXTRACTION; THRESHOLD VOLTAGE; CHANNEL-LENGTH; DRAIN; FRESH SO - Ieee Transactions on Electron Devices 2002 ;49(1):82-88 6744 UI - 10640 AU - Sanchez G AU - Latombe JC AD - ITESM, Cuernavaca, Morelos, MexicoStanford Univ, Dept Comp Sci, Stanford, CA 94305, USASanchez, G, ITESM, Campus Cuernavaca, Cuernavaca, Morelos, Mexico TI - On delaying collision checking in PRM planning: Application to multi-robot coordination AB - This paper describes the foundations and algorithms of a new probabilistic roadmap (PRM) planner that is: single-query-instead of pre-computing a roadmap covering the entire free space, it uses the two input query configurations to explore as little space as possible; bi-directional-it explores the robot's free space by building a roadmap made of two trees rooted at the query configurations,and lazy in checking collisions-it delays collision tests along the edges of the roadmap until they are absolutely needed. Several observations motivated this strategy: (1) PRM planners spend a large fraction of their time testing connections for collision; (2) most connections in a roadmap are not on the final path; (3) the collision test for a connection is most expensive when there is no collision; and (4) any short connection between two collision-free configurations has high prior probability of being collision-free. The strengths of single-query and bi-directional sampling techniques and those of delayed collision checking reinforce each other. Experimental results show that this combination reduces planning time by a large factor, making it possible to efficiently handle difficult planning problems, such as problems involving multiple robots in geometrically complex environments. This paper specifically describes the application of the planner to multi-robot planning and compares results obtained when the planner uses a centralized planning approach (PRM planning is then performed in the joint configuration space of the robots) and when it uses a decoupled approach (the PRM planner is invoked several times, first to compute a path of each robot independent of the others, and then to coordinate those paths). On a simulated six-robot welding station combining 36 degrees of freedom, centralized planning has proven to be a much more effective approach than decoupled planning MH - Mexico|Morelos MH - USA PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 16 U4 - Robotics U5 - J;Article AV - English IS - 0278-3649 UR - ISI:000177051400001 L2 - motion planning;probabilistic roadmaps;lazy collision checking;multi-robot coordination;PROBABILISTIC ROADMAPS; CONFIGURATION-SPACES; MOTION; PATH; OBJECTS; OBSTACLES SO - International Journal of Robotics Research 2002 ;21(1):5-26 6745 UI - 9582 AU - Sanchez GT AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoFlorida State Univ, Dept Phys, Tallahassee, FL 32306, USASanchez, GT, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Structure of radiative interferences and g=2 for vector mesons AB - The result of Burnett and Kroll (BK) states that for radiative decays, the interference of O(omega(-1)) in the photon energy omega vanishes after the sum over polarizations of the involved particles. Using radiative decays of vector mesons, we show that if the vector meson is polarized, the O(omega(-1)) terms are null only for the canonical value of the magnetic dipole moment of the vector meson, namely, g=2 in Bohr magneton units. A subtle cancellation of all O(omega(-1)) terms happens when summing over all polarizations to recover the Burnett-Kroll result. We also show the source of these terms and the corresponding cancellation for the unpolarized case and exhibit a global structure that can make them individually vanish in a particular kinematical region MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000179679400073 L2 - HIDDEN LOCAL SYMMETRIES; MAGNETIC DIPOLE-MOMENT; DECAY SO - Physical Review D 2002 ;66(9): 6746 UI - 9719 AU - Sanchez J AU - Jose MV AD - Univ Gothenburg, Dept Med Microbiol & Immunol, SE-41346 Gothenburg, SwedenUAEM, Fac Med, Cuernavaca 62210, Morelos, MexicoUNAM, Inst Invest Biomed, Mexico City 70228, DF, MexicoSanchez, J, Univ Gothenburg, Dept Med Microbiol & Immunol, SE-41346 Gothenburg, Sweden TI - Analysis of bilateral inverse symmetry in whole bacterial chromosomes AB - The positions of the 64 DNA tri-nucleotides (triplets) along the Borrelia burgdorferi chromosome were determined and cumulative position plots (CPP) were obtained. Analysis of CPP for complementary triplets revealed close correlations in complementary triplet frequencies (CTF) between opposing leading and lagging strands. Such bilateral inverse symmetry (BIS) applied also to complementary mono- and di-nucleotides and to some >3 n-tuples. At the level of individual bases BIS explains Chargaff's second parity rule for whole bacterial chromosomes. Using shuffled control sequences we show that single-base BIS was not the source of higher-order BIS. Analysis of CTF in 45 other chromosomes suggests that BIS is a general property of eubacteria. BIS at the various levels may be due to the very similar numbers of codons used in chromosomal halves. Evolutionarily, BIS could have resulted from asymmetric substitution of bases combined with genetic rearrangements. However, the provocative theoretical alternative of whole-genome inverse duplication is here considered. (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Sweden PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000179496700019 L2 - complementary triplets;bacterial replication origins;dot-plot analyses;codons in leading and lagging strands;strand asymmetry;Chargaff's DNA parity rules;bacterial genome evolution;ASYMMETRIC SUBSTITUTION PATTERNS; ESCHERICHIA-COLI; REPLICATION ORIENTATION; BORRELIA-BURGDORFERI; GENOMES; SEQUENCE; STRAND; FREQUENCIES; OLIGOMERS; SKEW SO - Biochemical and Biophysical Research Communications 2002 ;299(1):126-134 6747 UI - 10266 AU - Sanchez J AU - Wallerstrom G AU - Fredriksson M AU - Angstrom J AU - Holmgren J AD - Univ Autonoma Estado Morelos, Fac Med, Cuernavaca 62210, Morelos, MexicoGothenburg Univ, Dept Med Microbiol & Immunol, SE-41346 Gothenburg, SwedenGothenburg Univ, Vaccine Res Inst, SE-41346 Gothenburg, SwedenGothenburg Univ, Inst Med Biochem, SE-40530 Gothenburg, SwedenSanchez, J, Univ Autonoma Estado Morelos, Fac Med, Av Univ 101,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Detoxification of cholera toxin without removal of its immunoadjuvanticity by the addition of (STa-related) peptides to the catalytic subunit - A potential new strategy to generate immunostimulants for vaccination AB - Peptides related to the heat-stable enterotoxin STa were fused to the N terminus of the A-subunit of cholera toxin (CTA) to explore whether peptide additions could help generate detoxified cholera toxin (CT) derivatives. Proteins carrying APRPGP (6-CTA), ASRCAELCC-NPACPAP (16-CTA), or ANSSNYCCELCCNPACTGCYPGP (23-CTA) were genetically constructed. Using a two-plasmid system these derivatives were co-expressed in Vibrio cholerae with cholera toxin B-subunit (CTB) to allow formation and secretion of holotoxin-like molecules (engineered CT, eCTs). Purified eCTs maintained all normal CT properties yet they were more than 10-fold (eCT-6), 100-fold (eCT-16), or 1000-fold (eCT-23) less enterotoxic than wild-type CT. The inverse correlation between enterotoxicity and peptide length indicated sterical interference with the ADP-ribosylating active site in CTA. This interpretation agreed with greater than 1000-fold reductions in cAMP induction, with reductions, albeit not proportional, in in vitro agmatine ADP-ribosylation, and was supported by molecular simulations. Intranasal immunization of mice demonstrated that eCTs retained their inherent immunogenicity and ability to potentiate immune responses to a co-administered heterologous protein antigen, although in variable degrees. Therefore, the addition of STa-related peptides to CTA reduced the toxicity of CT while partly preserving its natural immunoadjuvanticity. These results suggest peptide extensions to CTA are a useful alternative to site-directed mutagenesis to detoxify CT. The simplicity of the procedure, combined with efficient expression and assembly of derivatives, suggests this approach could allow for large scale production of de. toxified, yet immunologically active CT molecules MH - Mexico|Morelos MH - Sweden PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000177859000126 L2 - HEAT-LABILE ENTEROTOXIN; ADP-RIBOSYLTRANSFERASE ACTIVITY; TOXIGENIC ESCHERICHIA-COLI; CRYSTAL-STRUCTURE; VIBRIO-CHOLERAE; A-SUBUNIT; B-SUBUNIT; MONOCLONAL-ANTIBODIES; ADENYLATE-CYCLASE; MUCOSAL ADJUVANT SO - Journal of Biological Chemistry 2002 ;277(36):33369-33377 6748 UI - 8437 AU - Sanchez JS AU - Barandela R AU - Ferri FJ AD - U Jaume I, Dept Llenguatges & Sistemes Informat, Castello 12071, SpainInst Tecnol Toluca, Metepec 52140, MexicoUniv Valencia, Dept Informat, E-46100 Burjassot, Valencia, SpainSanchez, JS, U Jaume I, Dept Llenguatges & Sistemes Informat, Castello 12071, Spain TI - On filtering the training prototypes in nearest neighbour classification AB - Filtering (or editing) is mainly effective in improving the classification accuracy of the Nearest Neighbour (NN) rule, and also in reducing its storage and computational requirements. This work reviews some well-known editing algorithms for NN classification and presents alternative approaches based on combining the NN and the, Nearest Centroid Neighbourhood of a sample. Finally, an empirical analysis over real data sets is provided MH - Mexico|Estado De Mexico MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000182749300021 L2 - LEARNING ALGORITHMS; SELECTION; CLASSIFIERS; DESIGN; GRAPHS; RULE SO - Topics in Artificial Intelligence, Proceedings 2002 ;2504():239-248 6749 UI - 11188 AU - Sanchez L AU - Seila RL AU - Christen P AU - Revah S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Chem Engn, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Dept Chem Engn, Mexico City 04510, DF, MexicoUS EPA, Res Triangle Pk, NC 27711, USAIRD Inst Francais Rech Sci Dev & Cooperat, Mexico City 11530, DF, MexicoSanchez, L, Fernando Lizardi 14,Colonial Iztapalapa, Iztapalapa 09270, DF, Mexico TI - Effect of leucine on aroma volatiles production from Ceratocystis fimbriata grown in liquid culture AB - Aroma volatiles produced by Ceratocystis fimbriata on a defined liquid synthetic medium with and without the addition of leucine were identified by gas chromatography-mass spectrometry and quantified by gas chromatography-flame ionisation detection in the liquid medium as well as in the headspace. Volatiles were extracted from the liquid by simultaneous steam distillation-solvent extraction. Ceratocystis fimbriata produced a complex set of volatile intermediary metabolites, of which ethanol was the dominant compound (similar to92-95% of total volatiles). Low molecular weight esters, alcohols, aldehydes, ketones, alkanes, and carboxylic acids were identified in the liquid broth. Alcohols and esters were the most abundant aroma volatiles. Leucine addition effected further growth and higher volatiles production. In the headspace, ethanol and ethyl acetate accounted for 92% of total volatiles over the synthetic medium and 89% when leucine was added. Aroma perception (fruity and banana) correlated closely with liquid and headspace total volatiles MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000175407500009 L2 - aroma;Ceratocystis fimbriata;flavouring;leucine;synthetic liquid culture;volatiles;SACCHAROMYCES-CEREVISIAE; FRUITY AROMA; FERMENTATION; COMPONENTS; ASPERGILLUS; ALCOHOLS; FLAVORS; LIPASE; ESTERS SO - World Journal of Microbiology & Biotechnology 2002 ;18(3):231-237 6750 UI - 11344 AU - Sanchez LA AU - Moran C AU - Reyna R AU - Ochoa T AU - Boots LR AU - Azziz R AD - Mexican Inst Social Secur, Mexico City, DF, MexicoUniv Alabama, Dept Med, Birmingham, AL, USAAzziz, R, Univ Alabama, Dept Obstet & Gynecol, 618 South 20th St, Birmingham, AL 35233 USA TI - Adrenal progestogen and androgen production in 21-hydroxylase-deficient nonclassic adrenal hyperplasia is partially independent of adrenocorticotropic hormone stimulation AB - Objective: To test the hypothesis that adrenal steroidogenesis in nonclassic adrenal hyperplasia (NCAH) patients is, at least in part, independent of adrenocorticotropic hormone (ACTII) control. Design: Prospective controlled clinical study. Setting: Patients and healthy volunteers in an academic research environment. Patient(s): Four patients with 21-hydroxylase (21-OH) deficient NCAH and four healthy control women. Intervention(s): Patients received the long-acting gonadotropin-releasing hormone analog (GnRH-a) leuprolide acetate (3.75 mg/month IM) on weeks 0 and 4; and dexamethasone (DEX) in weekly incremented doses (0.25 mg/day, 0.50 mg/day, 1.0 mg/day, and 1.5 mg/day), beginning on weeks 4, 5, 6, and 7, respectively. Main Outcome Measure(s): The levels of 17-hydroxyprogesterone (17-HP), progesterone (N). androstenedione (A4), dehydroepiandrosterone sulfate (DHS), and cortisol (F) were measured at the beginning of weeks 0, 4, 5, 6, 7, and at the end of the study (beginning of week 8). Result(s): Patients and controls had a similar median age and body mass index (BMI). There were no significant decreases in the median levels of the studied hormones following 4 weeks of treatment with GnRH-a only, in either NCAH patients or controls. Analysis of individual hormonal values demonstrated that by the end of the study (after DEX of 1.5 mg/day during a week) only 2 of 4, 0 of 4, 3 of 4 and 3 of 4 NCAH patients had 17-HP, P4, A4, and DHS levels within the range of control values, respectively. Conclusion(s): Ovarian and incremental adrenal suppression did not fully suppress progestogen and androgen production in all of the study patients with 2 1 -OH-deficient NCAH, suggesting that their production was partially independent of ACTH stimulation. Potentially in these patients subtle degrees of adrenocortical hyperplasia and/or abnormal enzymatic kinetics are responsible for the nonsupressibility MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000175066400020 L2 - nonclassic adrenal hyperplasia;glucocorticoid suppression;adrenal androgens;progestogens;hyperandrogenism;17-hydroxyprogesterone;DEFICIENCY; AXIS SO - Fertility and Sterility 2002 ;77(4):750-753 6751 UI - 10569 AU - Sanchez LV AU - Maldonado M AU - Bastidas-Ramirez BE AU - Norder H AU - Panduro A AD - Univ Guadalajara, Civil Hosp, Hlth Sci Ctr, Inst Chron Degenerat Dis, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Civil Hosp, Hlth Sci Ctr, Dept Mol Biol Med & Gastroenterol, Guadalajara 44430, Jalisco, MexicoSwedish Inst Infect Dis Control, Dept Virol, Stockholm, SwedenPanduro, A, Civil Hosp Belen, Dept Mol Biol Med, POB 2-500, Guadalajara 44280, Jalisco, Mexico TI - Genotypes and S-gene variability of Mexican hepatitis B virus strains AB - The genotypes and subtypes of 15 Mexican hepatitis B virus strains were determined by sequencing and phylogenetic analysis of the small S-gene. The most predominant strains were found to be divergent genotype/subtype F/adw4 strains (66.6%), followed by A/adw2 (20.0%), D/ayw3 (6.7%), and G/adw2 (6.7%). The S-genes of the Mexican genotype F strains and two Nicaraguan strains described previously formed a subcluster with more than 4% divergence from the other strains within this genotype. The Mexican strains within genotypes A and D showed the highest homology with strains from Europe and the United States. Ten amino acid substitutions not described previously were found in the S-genes of strains from nine chronic carriers, whereas the S gene in strains from six acute hepatitis B patients were highly conserved as compared to their respective genotypes. One genotype F strain from an HBsAg positive chronic carrier had a T to A mutation at position 647, forming a translational stop at codon 216. Two genotype F strains from HBsAg negative chronic carriers had a Val180 instead of an Ala found in the other genotype F strains. This study shows that a divergent genotype F predominates in Mexican strains analyzed, which presented amino acid substitutions not reported previously outside the a determinant. (C) 2002 Wiley-Liss, Inc MH - Mexico|Jalisco MH - Sweden PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 29 U4 - Virology U5 - J;Article AV - English IS - 0146-6615 UR - ISI:000177188000005 L2 - HBV genotype;small S-gene;hBsAg;SURFACE-ANTIGEN HBSAG; MONOCLONAL-ANTIBODIES; PHYLOGENETIC RELATEDNESS; CENTRAL-AMERICA; SOUTH-AFRICA; SUBTYPES; DETERMINANT; MUTATIONS; HBV; PREVALENCE SO - Journal of Medical Virology 2002 ;68(1):24-32 6752 UI - 10802 AU - Sanchez M AU - Keizer TS AU - Parkin S AU - Hopfl H AU - Atwood DA AD - Univ Kentucky, Dept Chem, Lexington, KY 40506, USAUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoAtwood, DA, Univ Kentucky, Dept Chem, Chem Phys Bldg, Lexington, KY 40506 USA TI - Salen-supported dinuclear and trinuclear boron compounds AB - Six boron compounds have been synthesized through the combination of phenylboronic acid and various Salen (N,N'-ethylenebis(2-hydroxy)benzylidenimine) ligands. They contain seven- and eight-membered heterocycles with a bridging oxygen and have the formula: L[(PhB)(2)(mu-O)] (L = Acmen (1), Salen(Bu-t) (2), Sal(2-OH)pen (3), Salpen(Bu-t) (4), Acpen (5)) and L[B-2(mu-O)(O2BPh)] (L = Acen (6), Salmen (7)). Compounds 6 and 7 are interesting trinuclear boron derivatives with two four-coordinate and one three-coordinate boron atoms. The compounds have been characterized by MP, MS, IR, EA and H-1- and B-11-NMR, by B-11-MAS for 6 and 7 and by X-ray crystallography for 2, 4-7. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000176474300007 L2 - boron;salen;binuclear;trinuclear;(SALEN)MANGANESE(III) COMPLEXES; ASYMMETRIC OXIDATION; KINETIC RESOLUTION; INDIUM COMPLEXES; LIGANDS; EPOXIDES; 5-COORDINATE; CATALYSTS; ALUMINUM; CRYSTAL SO - Journal of Organometallic Chemistry 2002 ;654(1-2):36-43 6753 UI - 10824 AU - Sanchez MDP AU - Torres A AU - Boniotti MB AU - Gutierrez C AU - Vazquez-Ramos JM AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Autonoma Madrid, Ctr Biol Mol Severo Ochoa, E-28049 Madrid, SpainVazquez-Ramos, JM, Univ Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Ave Univ & Copilco, Mexico City 04510, DF, Mexico TI - PCNA protein associates to Cdk-A type protein kinases in germinating maize AB - In higher eukaryotes, the proliferating cell nuclear antigen (PCNA) can be found associated to Cyclin D and Cdk4/6, the kinase complex responsible for cell cycle commitment in response to growth and mitogenic signals. During maize germination, PCNA can be found in protein complexes between 131 and 163 kDa. The sizes of PCNA protein complexes seem to change during germination, so that by the time the S phase starts, a complex of 100 kDa (likely the homotrimeric ring) is the predominant one. PCNA complexes during early germination contain (any of) two PSTAIRE-containing protein kinases of 32 and 36 kDa that readily phosphorylate both histone H1 and maize retinoblastoma-related (RBR) proteins. Kinase activity in PCNA complexes is markedly inhibited by roscovitine and olomoucine, two known Cdk inhibitors. The protein p13(Suc1) only pulls down the 36 kDa PSTAIRE protein. Kinase activity in PCNA immunoprecipitates is maximal during early germination, before the onset of the S-phase, whereas kinase activity associated to p13(Suc1) reaches a peak later, after the onset of the S-phase. We discuss the physiological repercussions of these findings MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0167-4412 UR - ISI:000176462800002 L2 - germination;maize;PCNA;PSTAIRE kinase;CELL NUCLEAR ANTIGEN; DNA POLYMERASE-DELTA; CYCLIN-DEPENDENT KINASES; AUXILIARY PROTEIN; DIVISION CYCLE; ZEA-MAYS; PLANTS; COMPLEX; GROWTH; GENES SO - Plant Molecular Biology 2002 ;50(2):167-175 6754 UI - 9618 AU - Sanchez S AU - Demain AL AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoDrew Univ, RISE, Charles A Dana Res Inst, Madison, NJ 07940, USASanchez, S, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, Mexico TI - Metabolic regulation of fermentation processes AB - To compete in nature against other forms of life, microorganisms possess regulatory mechanisms which control production of their metabolites, thus, protecting against overproduction and excretion of these primary and secondary metabolites into the environment. To effect such an economical form of life, they possess regulatory mechanisms which control production of these metabolites and protect against overproduction and excretion into the environment of excess concentrations. In the field of industrial fermentation, the opposite concept prevails. Fermentation microbiologists search for a rare overproducing strain in nature, then further deregulate the microorganism so that it overproduces huge quantities of a desired commercially important product such as a metabolite or an enzyme. Deregulation is brought about by nutritional as well as classical and molecular genetic manipulations to bypass and/or remove negative regulatory mechanisms and to enhance positive regulatory mechanisms. These mechanisms include induction, nutritional regulation by sources of carbon, nitrogen and phosphorus, and feedback control. The controls and their modification by biotechnologists are the subjects of this review. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 22 U4 - Biotechnology & Applied Microbiology U5 - J;Review AV - English IS - 0141-0229 UR - ISI:000179783500001 L2 - regulation;fermentation;industrial microbiology;production of metabolites;STREPTOMYCES-COELICOLOR A3(2); FED-BATCH FERMENTATIONS; GRAM-POSITIVE BACTERIA; PEUCETIUS VAR. CAESIUS; YEAST CANDIDA-UTILIS; GLUCOSE KINASE GENE; A-FACTOR RECEPTOR; BACILLUS-SUBTILIS; PENICILLIUM-CHRYSOGENUM; GLUTAMINE-SYNTHETASE SO - Enzyme and Microbial Technology 2002 ;31(7):895-906 6755 UI - 10538 AU - Sanchis M AU - Tamariz-Mascarua A AD - Univ Jaume 1, Dept Matemat, Castello, SpainNatl Autonomous Univ Mexico, Dept Matemat, Fac Ciencias, Mexico City 04510, DF, MexicoSanchis, M, Univ Jaume 1, Dept Matemat, Campus Riu Sec S-N, Castello, Spain TI - A note on p-bounded and quasi-p-bounded subsets AB - We discuss the relationship between p-boundedness and quasi-p-boundedness in the realm of GLOTS for p is an element of omega*. We show that p-pseudocompactness, p-compactness, quasi-p-pseudocompactness and quasi-p-compactness are equivalent properties for a GLOTS; that bounded subsets of a GLOTS are strongly-bounded; and C-compact subsets of a GLOTS are strongly-C-compact. We also show that a topologically orderable group is locally precompact if and only if it is metrizable. For bounded subsets of a GLOTS, a version of the classical Gilcksberg's Theorem on pseudocompactness is obtained: if A(alpha) is a bounded subset of a GLOTS X-alpha for each alpha is an element of Delta, then cl(beta(Pialphais an element ofDelta) X-alpha) (Pi(alphais an element ofDelta) A(alpha)) = Pi(alphais an element ofDelta) cl(beta(Xalpha))A(alpha). Also we prove that there exists an ultrapseudocompact topological group which is not quasi-p-compact for any p is an element of omega*. To see this example, p-pseudocompactness and p-compactness are investigated in the field of C-pi-spaces, proving that ultracompactness, quasi-p-compactness for a p is an element of omega* and countable compactness (respectively, ultrapseudocompactness, quasi-p-pseudocompactness for a p is an element of omega* and pseudocompactness) are equivalent properties in the class of spaces of the form C-pi(X, [0, 1]) MH - Mexico|Distrito Federal MH - Spain PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000177257700006 L2 - p-limit point;p-pseudocompact space;p-compact space;p-bounded set;quasi p-bounded set;strongly bounded set;C-compact set;spaces of continuous functions;Generalized Linearly Topological Spaces;P-space;alpha-b-discrete space;topological group;COMPACT SUBSETS; SPACES SO - Houston Journal of Mathematics 2002 ;28(3):511-527 6756 UI - 10938 AU - Sanchis M AU - Tkachenko M AD - Univ Jaume I, Dept Matemat, Castello 12071, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoSanchis, M, Univ Jaume I, Dept Matemat, Campus Riu Sec, Castello 12071, Spain TI - Suitable sets for subgroups of direct sums of discrete groups AB - Let G = circle plus (x0.9) as well as satisfactory detection limits (<0.35 ppm) were achieved. The analytical results provided by CE were compared with those obtained by traditional wet-chemical (WCH) methods. Most of the results obtained by CE were consistent with those of WCH, except for one sample. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000176486700035 L2 - hailstones;inorganic anions;WATER; IONS SO - Journal of Chromatography A 2002 ;956(1-2):279-286 6771 UI - 11510 AU - Santoyo E AU - Verma SP AU - Sandoval F AU - Aparicio A AU - Garcia R AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoComis Fed Elect Residencia Geoterm Los Azufres, Michoacan, MexicoCSIC, Museo Nacl Ciencias Nat, Dept Volcanol, Madrid 28006, SpainSantoyo, E, UNAM, Ctr Invest Energia, Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Suppressed ion chromatography for monitoring chemical impurities in steam for geothermal power plants AB - A suppressed ion chromatography (IC) technique has been evaluated as a chemical monitoring tool for detecting major anions (F-, Cl-, NO3- and SO42-) of condensed steam in geothermal power plants. It is shown that the suppressed IC technique provides a suitable means for preventing possible damage to generating equipment in the geothermal industry. An electrical conductivity detector (0.1 muS sensitivity) with an anion-exchange column (IonPac AS4A-SC), a micro-membrane suppressor (AMMS II), and an isocratic high-pressure pump system were successfully used for detecting low concentrations of inorganic anions. Method detection limits for the anions of interest were < 0.184 mg/L. Details of the IC methodology as well as some experimental results obtained during its application for the chemical monitoring of geothermal steam pipes are also described. (C) 2002 Elsevier Science B V All rights reserved MH - Mexico|Michoacan MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000174633300029 L2 - process control;geothermal fluids;inorganic ions;INORGANIC ANIONS; ELUENT; WATER SO - Journal of Chromatography A 2002 ;949(1-2):281-289 6772 UI - 11679 AU - Sanvicente-Anorve L AU - Lepretre A AU - Davoult D AD - Univ Sci & Technol Lille, Lab Ecol Numer SN3, F-59655 Villeneuve Dascq, FranceUniv Littoral Cote Opale, F-62930 Wimereux, FranceSanvicente-Anorve, L, Univ Nacl Autonoma Mexico, FES Zaragoza, Campo 2,Batalla 5 Mayo S-N Esq, Mexico City 09230, DF, Mexico TI - Diversity of benthic macrofauna in the eastern English Channel: comparison among and within communities AB - The diversity of benthic macrofaunal assemblages in the eastern English Channel is described from 707 samples collected with a Rallier-du-Baty dredge during 1971-1975. Four assemblages were primarily defined by means of multivariate data analyses and clustering methods: the 'Abra alba community', the 'Ophelia borealis community', the 'pebbles community' and a 'mixed assemblage' of the first three communities. Spatial heterogeneity of these communities is significantly correlated with sedimentary characteristics, although local variability appears to be controlled by both physical and biological processes. Ecological diversity of these communities was analysed considering species richness (S), the Shannon diversity index (H'), and rank-frequency diagrammes (RFD). These analyses were performed at two spatial scales: for a single sample, and for a 'site' of 10 pooled samples. Thus, several sites were chosen in order to compare diversity patterns and species quantitative structure among and within the communities. The greatest species richness was recorded for the pebbles (57-69) and the A. alba (63-79) communities. In the former, high values may be due to the complexity of microhabitats and the large flux of food related to strong currents. In the latter, both organic matter and terrestrial inputs associated with the mud favour the presence of deposit-feeder organisms. No clear trend was observed among and within the community sites in terms of the species quantitative structure. Thus, convex RFD shapes were observed in three assemblages: the 'mixed assemblage' (offshore site), the A. alba (North Sea), and the pebbles (Normandy coast). 'Sigmoid' shapes were observed in the pebbles (Dover Strait) and A. alba (English coast) communities. Presumably, these shapes can be caused by the combined action of physical (strong currents, substrate stability, mud content in the sediments) and biological factors (co-occurrence of species from different communities, strong species recruitment, relative dominance of carnivorous species) MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000174253500005 L2 - benthos;community structure;diversity;English Channel;spatial scales;HABITAT COMPLEXITY; SPECIES-DIVERSITY; DOVER STRAIT; NORTH-SEA; BIODIVERSITY; SEDIMENTS; RICHNESS SO - Biodiversity and Conservation 2002 ;11(2):265-282 6773 UI - 9711 AU - Sar EA AU - Hernandez-Becerril DU AU - Sunesen I AD - Natl Univ La Plata, Fac Ciencias Nat & Museo, Dept Cient Ficol, RA-1900 La Plata, ArgentinaUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoSar, EA, Natl Univ La Plata, Fac Ciencias Nat & Museo, Dept Cient Ficol, Paseo Bosque S-N, RA-1900 La Plata, Argentina TI - A morphological study of Chaetoceros tenuissimus meunier, a little-known planktonic diatom, with a discussion of the Section Simplicia, subgenus Hyalochaete AB - The morphology of Chaetoceros tenuissimus Meunier, a little-known species, has been studied for the first time with electron microscopy. C. tenuissimus has been placed as a synomyn of C. simplex Ostenfeld since approximately 1930, and has been misidentified or neglected in routine phytoplankton counts. The cells are very small and solitary, square to rectangular in girdle view. The setae are narrow and straight, arising from the two poles of the valve at an angle of 45degrees to its apical axis. The valve face possesses an annulus, delimited by a hyaline rim. Costae and small areolae radiate from the annulus. A single rimoportula occurs within the annulus. The rimoportula opens externally in a flatened tube and internally by a simple slit. The setae exhibit spirals of minute pores and an intricate pattern of spiral and perpendicular costae; spines are regularly present. Similarities with closely related species in Section Simplicia are discussed MH - Argentina MH - Mexico|Distrito Federal PB - BRISTOL: BIOPRESS LIMITED RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0269-249X UR - ISI:000179522500007 L2 - BACILLARIOPHYCEAE SO - Diatom Research 2002 ;17(2):327-335 6774 UI - 10197 AU - Saridakis E AU - Dierks K AU - Moreno A AU - Dieckmann MWM AU - Chayen NE AD - Univ London Imperial Coll Sci Technol & Med, Fac Med, Div Biomed Sci, Biol Struct & Funct Sect, London SW7 2AZ, EnglandDierks & Partner Syst Tech, D-20257 Hamburg, GermanyUNAM, Inst Quim, Dept Bioquim, Mexico City, DF, MexicoEuropean Space Agcy, ESTEC, NL-2200 AG Noordwijk, NetherlandsChayen, NE, Univ London Imperial Coll Sci Technol & Med, Fac Med, Div Biomed Sci, Biol Struct & Funct Sect, London SW7 2AZ, England TI - Separating nucleation and growth in protein crystallization using dynamic light scattering AB - A means of controlling crystallization is to separate the phases of nucleation and growth. Methods to achieve this, other than seeding, involve lowering the supersaturation by changing the temperature or diluting drops after incubating them for a given time at nucleation conditions. However, by the time nuclei or crystals are visible under the microscope too many nuclei will have formed. Dynamic Light Scattering was applied practically, to determine the most likely time for nucleation-growth decoupling to be performed successfully. The time at which DLS showed a significant change in the size-distribution of species in solution, corresponded to that optimal time MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Netherlands PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 8 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biophysics;Crystallography U5 - J;Article AV - English IS - 0907-4449 UR - ISI:000178248000020 L2 - protein crystallization;nucleation;microbatch;dynamic light scattering;biological macromolecules;crystallogenesis;SOLUBILITY SO - Acta Crystallographica Section D-Biological Crystallography 2002 ;58():1597-1600 6775 UI - 9753 AU - Sarma SSS AU - Nandini S AU - Gulati RD AD - Natl Autonomous Univ Mexico, Div Res & Postgrad Studies, Lab Aquat Zool, Unit UMF, Los Reyes 54090, Tlalnepantla, MexicoNatl Autonomous Univ Mexico, Div Res & Postgrad Studies, CyMA Project, Los Reyes 54090, Tlalnepantla, MexicoNetherlands Inst Ecol, Ctr Limnol, NL-63631 AC Nieuwersluis, NetherlandsSarma, SSS, Natl Autonomous Univ Mexico, Div Res & Postgrad Studies, Lab Aquat Zool, Unit UMF, Campus Iztacala,AP 314, Los Reyes 54090, Tlalnepantla, Mexico TI - Cost of reproduction in selected species of zooplankton (rotifers and cladocerans) AB - Reproduction is an energetically costly biological process. Among the freshwater zooplankton, rotifers and cladocerans reproduce parthenogenetically and the cost of reproduction can be estimated using the life table data from demographic studies. Reduced probability of future survival or future reproduction as a result of current investment in offspring production (trade-off) is the central theme of the cost hypothesis. Correlations using present reproduction vs. future reproduction ( called the reproductive costs) or future survival ( called the survival costs) can be used to evaluate the cost hypothesis. In this work sets of correlations were made: (1) between present reproduction (m(x)) vs. future survival (l(x+1), l(x+2), l(x+3) etc. for the entire lifespan) ( survival costs), and ( 2) present reproduction (m(x)) vs. future reproduction (m(x+1), m(x+2), m(x+3) etc. for the entire reproductive span) ( reproductive costs). These correlations were plotted against the cohort age-classes in order to quantify survival and reproductive costs in rotifers (Asplanchna girodi, Brachionus macracanthus, B. variabilis and Platyias quadricornis) and cladocerans ( Ceriodaphnia cornuta - one strain maintained on Chlorella and another strain adapted to Microcystis), Daphnia carinata, D. laevis, Moina macrocopa, Pleuroxus aduncus, Scapholeberis kingi and Simocephalus vetulus). All the tested rotifer species showed negative tendency in correlation coefficients ( when the data of current reproduction vs. future reproduction and future survival were plotted) for both reproductive and survival costs. However, from the total survival and reproductive costs derived, 84% of the former and 42% of the latter were statistically significant. In cladocerans about 80% of the costs ( correlations between current reproduction vs. future survival or future reproduction) were negative suggesting that present reproduction had negatively affected both the further survival and reproduction of test populations. In terms of statistically significant survival costs, the cladocerans showed a trend slightly lower (72%) but comparable to rotifers. The reproductive costs were significant in 45% cases. In our study, the simple statistical correlations detected the trade-offs between reproduction and survival. Thus, in more than 60% cases of both survival and reproductive costs in zooplankton were negative, and our data supported the cost hypothesis, in the majority of cases where reproduction by zooplankton of a given age class caused reduced survival and reproduction of the next age class MH - Mexico|Estado De Mexico MH - Netherlands PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000179387400007 L2 - demography;reproductive cost;survival cost;rotifers;cladocerans;correlation analysis;LIFE TABLE DEMOGRAPHY; CHLORELLA-VULGARIS; POPULATION-GROWTH; FOOD; DENSITIES; SEX SO - Hydrobiologia 2002 ;481(1-3):89-99 6776 UI - 10570 AU - Saucedo-Munoz ML AU - Komazaki S AU - Takahashi T AU - Hashida T AU - Shoji T AD - Tohoku Univ, Fac Engn, Fracture Res Inst, Sendai, Miyagi 9808579, JapanESIQIE IPN, Inst Poltecn Nacl, Mexico City 07300, DF, MexicoMuroran Inst Technol, Muroran, Hokkaido 0508585, JapanSaucedo-Munoz, ML, Tohoku Univ, Fac Engn, Fracture Res Inst, Sendai, Miyagi 9808579, Japan TI - Creep property measurement of service-exposed SUS 316 austenitic stainless steel by the small-punch creep-testing technique AB - The creep properties for SUS 316 HTB austenitic stainless steel were evaluated by using the small-punch creep test at 650 degreesC for loads of 234, 286, 338, 408, and 478 N and at 700 degreesC for loads of 199 and 234 N. The creep curves, determined by means of the small-punch creep test, were similar to those obtained from a conventional uniaxial creep test. That is, they exhibited clearly the three creep stages. The width of secondary creep stage and rupture time t(r) decreased with the increase in testing load level. The creep rupture strength for the service-exposed material was lower than that of the as-received material at high testing loads. However, the creep resistance behavior was opposite at relatively low load levels. This difference in creep resistance was explained on the basis of the difference in the creep deformation and microstructural evolution during tests. It was also found that the ratio between the load of small-punch creep test and the stress of uniaxial creep test was about I for having the same value of creep rupture life MH - Japan MH - Mexico|Distrito Federal PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000177208800013 SO - Journal of Materials Research 2002 ;17(8):1945-1953 6777 UI - 11455 AU - Saucedo-Munoz ML AU - Liu SC AU - Komazaki SI AU - Kwon IH AU - Hashida T AU - Takahashi H AU - Nakajima H AD - Tohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 9808579, JapanESIQIE IPN, Inst Politecn Nacl, Mexico City 07300, DF, MexicoDalian Inst Railway Technol, Dept Mat Engn, Dalian 116022, Peoples R ChinaMuroran Inst Technol, Muroran, Hokkaido 0508585, JapanChonbuk Natl Univ, Dept Precis Mech Engn, Chonju, South KoreaJapan Atom Energy Res Inst, Nakamichi, Ibaraki 31102, JapanSaucedo-Munoz, ML, Tohoku Univ, Fracture Res Inst, Aoba Ku, Sendai, Miyagi 9808579, Japan TI - Evaluation of thermal aging embrittlement of austenitic stainless steels JN1, JJ1, and JK2 by cryogenic small-punch testing AB - Small-punch tests were conducted at 4, 77, and 293 K on three newly developed cryogenic austenitic stainless steels, JN1, JJ1, and JK2, which were solution treated, water-quenched, and then aged at 923, 973, 1023, and 1073 K for 5 h. Small-punch test energy was employed for the evaluation of the aging-induced embrittlement behavior in these materials. An SEM analysis of the fracture surface for the solution-treated steel specimens indicated a ductile fracture, having the highest SP test energy values. On the contrary, intergranular brittle fracture was observed in aged specimens. The small-punch test energy of materials decreased significantly as the aging process progressed. The highest and lowest decrease in small-punch test energy with aging temperature occurred in JN1 and JK2 steels, respectively. The decrease in small-punch test energy was shown to follow appropriately the aging-induced embrittlement in these materials. The difference in aging-induced embrittlement behavior for these steels was explained on the basis of the volume fraction of intergranular precipitates in aged samples MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China MH - South Korea PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000174805700022 L2 - FRACTURE-TOUGHNESS; TRANSITION SO - Journal of Materials Research 2002 ;17(4):852-860 6778 UI - 9959 AU - Saucedo R AU - Macias JL AU - Bursik MI AU - Mora JC AU - Gavilanes JC AU - Cortes A AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoSUNY Buffalo, Dept Geol, Buffalo, NY 14260, USAUniv Colima, Observ Vulcanol, Colima 28000, Col, MexicoSaucedo, R, UNASLP, Fac Ingn, Inst Geol, Av Manuel Nava 5,Zona Univ, San Luis Potosi 78240, SLP, Mexico TI - Emplacement of pyroclastic flows during the 1998-1999 eruption of Volcan de Colima, Mexico AB - After three years of quiescence, Volcan de Colima reawakened with increasing seismic and rock fall activity that reached its peak on November 20, 1998, when a new lava dome forced its way to the volcano's summit. The new lava rapidly reached the S-SW edge of the summit area, beginning the generation of Merapi-type pyroclastic flows that traveled down La Lumbre, and the El Cordoban Western and Eastern ravines, reaching distances of 3, 4.5, and 3 km, respectively. On December 1, 1998, the lava flow split into three fronts that in early 1999 had reached 2.8, 3.1, and 2.5 kin in length, advancing down the El Cordoban ravines. The lava flow fronts disaggregated into blocks forming pyroclastic flows. One of the best examples occurred on December 10, 1998. As the lava flow ceased moving in early 1999, activity became more explosive. Strong blasts were recorded on February 10, May 10, and July 17, 1999. The last event developed a 10-km-high eruptive column from which a pyroclastic flow developed from the base, traveling 3.3 km SW from the summit into the San Antonio-Montegrande ravines. Regardless of the mechanism of pyroclastic-flow generation, each flow immediately segregated into a basal avalanche that moved as a granular flow and an upper ash cloud in which particles were sustained in turbulent suspension. When the basal avalanche lost velocity and eventually stopped, the upper ash cloud continued to move independently as a dilute pyroclastic flow that produced a massive pyroclastic-flow deposit and an upper dune-bedded surge deposit. The dilute pyroclastic flow scorched and toppled maguey plants and trees, and sandblasted vegetation in the direction of the flow. At the end of the dilute pyroclastic-flow path, the suspended particles lifted off in a cloud from which a terminal ash fall was deposited. The basal avalanche emplaced block-and-ash flow deposits (up to 8 in thick) that filled the main ravines and consisted of several flow units. Each flow unit was massive, monolithologic, matrix-supported, and had a clast-supported steep front (ca. 1.5 to 2 m thick) composed of boulders up to 1.7 m in diameter. The juvenile lithic clasts had an average density of 1800 kg/ml. The dilute pyroclastic flow emplaced overbank deposits, found on valley margins or beyond the tip of block-and-ash flow deposits. They consist from bottom to top of a massive medium to coarse sand-size flow layer (2-4 cm thick), a dune-bedded surge layer (2-10 cm thick), and a massive silt-size layer (0.5 cm thick). The total estimated volume of the pyroclastic-flow deposits produced during the 1998-1999 eruption is 24 X 10(5) m(3). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000178855900012 L2 - Merapi and Soufriere type block-and-ash flows;detached dilute pyroclastic flow;Colima;Mexico;SOUFRIERE-HILLS-VOLCANO; MOUNT-ST-HELENS; UNZEN VOLCANO; TRANSPORT MECHANISMS; DEPOSITS; MONTSERRAT; LAVA; AVALANCHES; GENERATION; WASHINGTON SO - Journal of Volcanology and Geothermal Research 2002 ;117(1-2):129-153 6779 UI - 9181 AU - Sawada-Satoh S AU - Inoue M AU - Shibata KM AU - Kameno S AU - Nakai N AU - Migenes V AU - Diamond PJ AD - Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, JapanNatl Astron Observ, Mitaka, Tokyo 1818588, JapanNobeyama Radio Observ, Minamisa Ku, Nagano 3841305, JapanUniv Guanajuato, Guanajuato 36000, MexicoUniv Manchester, Nuffield Radio Astron Labs, Jodrell Bank, JBO, Macclesfield SK11 9DL, Cheshire, EnglandSawada-Satoh, S, Inst Space & Astronaut Sci, Yoshinodai, Sagamihara, Kanagawa 2298510, Japan TI - Proper motion of a nuclear jet relative to a maser feature in NGC 3079 AB - We present high resolution studies of the nuclear region in NGC 3079 with phase-referenced VLBI monitoring between its water maser and continuum emission. From results of the observations, NGC 3079 showed relative motion between core-jet-like continuum components. One of the components (A) relative to the reference maser feature moved with an apparent subluminal velocity along the SE-NW direction, almost parallel to alignment of the components. On the other hand, the position of the other component (13) did not show such a significant change. If the maser gas is associated with a rotating disk, the maser gas should be gravitationally bound to the central mass. This suggests that B and A are the nucleus and jet, respectively MH - United Kingdom MH - Japan MH - Mexico|Guanajuato PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article AV - English IS - 0074-1809 UR - ISI:000181054300084 L2 - GALAXY NGC-3079; EMISSION SO - Cosmic Masers: from Protostars to Blackholes 2002 ;(206):404-407 6780 UI - 10620 AU - Schaaf P AU - Weber B AU - Weis P AU - Gross A AU - Ortega-Gutierrez F AU - Kohler H AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCICESE, Div Ciencias Tierra, Ensenada 22860, Baja California, MexicoUniv Munich, Inst Mineral Petrol & Geochem, D-80333 Munich, GermanyUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSchaaf, P, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - The Chiapas Massif (Mexico) revised: New geologic and isotopic data and basement characteristics AB - In this contribution we present the results of detailed geological mapping in the central region of the Chiapas igneous massif, SE Mexico, accompanied by new Sr-Nd isotopic data. In the study area, intrusive rocks range from granitoids to diorites and gabbros. Nearly all of them display ductile deformation features and metamorphic textures, locally forming mylonites. A Rb-Sr whole rock regression line for seven mafic samples yields an age value of 509 +/- 97 Ma (2sigma) which provides evidence for the existence of a Pan-African basement. Rb-Sr biotite ages are distributed into two groups: 230 Ma and 175 Ma, which corresponds to Triassic and middle Jurassic tectonothermal overprints MH - Germany MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 7 U4 - Paleontology U5 - J;Article AV - English IS - 0077-7749 UR - ISI:000177007800001 L2 - SOUTHERN MEXICO; SM-ND; GEOCHRONOLOGY; NEODYMIUM; EVOLUTION; COMPLEX; ORIGIN SO - Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 2002 ;225(1):1-23 6781 UI - 10836 AU - Schaaf P AU - Muller-Sohnius D AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Munich, Inst Mineral Petrol & Geochem, D-80333 Munich, GermanySchaaf, P, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Strontium and neodymium isotopic study of Libyan Desert Glass: Inherited Pan-African age signatures and new evidence for target material AB - Libyan Desert Glass (LDG) is an impact-related, natural glass of still unknown target material. We have determined Rb-Sr and Sm-Nd isotopic ratios from seven LDG samples and five associated sandstones from the LDG strewn field in the Great Sand Sea, western Egypt. Planar deformation features were recently detected in quartz from these sandstones. Sr-87/Sr-86 ratios and epsilon-Nd values for LDG range between 0.71219 and 0.71344, and between -16.6 and -17.8, respectively, and hence are distinct from the less radiogenic 87Sr/86Sr ratios of 0.70910-0.71053 and epsilon-Nd values from -6.9 to -9.6 for the local sandstones from the LDG strewn field. Previously published isotopic ratios from the Libyan BP and Oasis crater sandstones are generally incompatible with our LDG values. LDG formation undoubtedly occurred at 29 Ma, but neither the Rb-Sr nor the Sm-Nd isotopic system were rehomogenised during the impact event, as we can deduce from Pan-African ages of similar to540 Ma determined from the regression lines from a total of 14 LDG samples from this work and the literature. Together with similar Sr and Nd isotopic values for LDG and granitoid rocks from northeast Africa west of the Nile, these findings point to a sandy matrix target material for the LDG derived from a Precambrian crystalline basement, ruling out the Cretaceous sandstones of the former "Nubian Group" as possible precursors for LDG MH - Germany MH - Mexico|Distrito Federal PB - FAYETTEVILLE: METEORITICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1086-9379 UR - ISI:000176537100008 L2 - TEKTITES; SR; ND; PROVENANCE SO - Meteoritics & Planetary Science 2002 ;37(4):565-576 6782 UI - 10519 AU - Schafer R AU - Barth M AU - Leyvraz F AU - Muller M AU - Seligman TH AU - Stockmann HJ AD - Univ Marburg, Fachbereich Phys, D-35032 Marburg, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, Mexicouniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoSchafer, R, Univ Marburg, Fachbereich Phys, Renthof 5, D-35032 Marburg, Germany TI - Transition from Gaussian-orthogonal to Gaussian-unitary ensemble in a microwave billiard with threefold symmetry AB - Recently it has been shown that time-reversal invariant systems with discrete symmetries may display, in certain irreducible subspaces, spectral statistics corresponding to the Gaussian-unitary ensemble (GUE) rather than to the expected orthogonal one (GOE). A Kramers-type degeneracy is predicted in such situations. We present results for a microwave billiard with a threefold rotational symmetry and with the option to display or break a reflection symmetry. This allows us to observe the change from GOE to GUE statistics for one subset of levels. Since it was not possible to separate the three subspectra reliably, the number variances for the superimposed spectra were studied. The experimental results are compared with a theoretical and numerical study considering the effects of level splitting and level loss MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000177200600050 L2 - SPECTRA; STATISTICS; SYSTEMS SO - Physical Review e 2002 ;66(1): 6783 UI - 9744 AU - Schaller M AU - Hoffmann KH AU - Rivero R AU - Andresen B AU - Salamon P AD - Tech Univ Chemnitz, Dept Phys, D-09107 Chemnitz, GermanyMexican Inst Petr, Mexico City, DF, MexicoUniv Copenhagen, Orsted Lab, Copenhagen, DenmarkSan Diego State Univ, Dept Math Sci, San Diego, CA 92182, USASchaller, M, Tech Univ Chemnitz, Dept Phys, D-09107 Chemnitz, Germany TI - The influence of heat transfer irreversibilities on the optimal performance of diabatic distillation columns AB - A distillation column with the possibility of heat exchange on every tray (a fully diabatic column) is optimized in the sense of minimizing its total entropy production. This entropy production counts the interior losses due to heat and mass flow as well as the entropy generated in the heat exchangers. It is observed that the optimal heating distribution, i.e. the heat exchange required on each tray, is essentially the same for all trays in the stripping and rectification sections, respectively. This makes a column design with consecutive interior heat exchanger and only one exterior supply for each of the two sections very appealing. The result is only slightly dependent on the heat transfer law considered. In the limit of an infinite number of trays even this column with resistance to transfer of heat becomes reversible MH - Denmark MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 12 U4 - Thermodynamics;Mechanics U5 - J;Article AV - English IS - 0340-0204 UR - ISI:000179447700005 L2 - SEPARATION PROCESSES; BINARY DISTILLATION; EQUIPARTITION SO - Journal of Non-Equilibrium Thermodynamics 2002 ;27(3):257-269 6784 UI - 9947 AU - Schippers S AU - Muller A AU - Ricz S AU - Bannister ME AU - Dunn GH AU - Bozek J AU - Schlachter AS AU - Hinojosa G AU - Cisneros C AU - Aguilar A AU - Covington AM AU - Gharaibeh MF AU - Phaneuf RA AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyHungarian Acad Sci ATOMKI, Inst Nucl Res, H-4001 Debrecen, HungaryOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Colorado, JILA, Boulder, CO 80309, USALawrence Berkeley Lab, Adv Light Source, Berkeley, CA, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Nevada, Dept Phys, Reno, NV 89557, USASchippers, S, Univ Giessen, Inst Kernphys, D-35392 Giessen, Germany TI - Experimental link of photoionization of Sc2+ to photorecombination of Sc3+: An application of detailed balance in a unique atomic system AB - The principle of microscopic time reversal of physical processes, detailed balance, is widely used and depended upon in the theoretical community as a connection between photorecombination (PR) and photoionization (PI). This paper reports on a novel use of detailed balance and the comparison of experimental results obtained by two very distinct techniques to determine both the metastable fraction of an ion beam and partial Sc3+ PR cross sections and partial Sc2+ PI cross sections for the ground state and for two metastable states. The Sc2+ to Sc3+ system presents a unique opportunity to obtain comprehensive state-selective information by combining results from PR and PI experiments MH - Germany MH - Hungary MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000178790900013 L2 - IONS; REGION SO - Physical Review Letters 2002 ;89(19): 6785 UI - 10484 AU - Schmid-Grendelmeier P AU - Mahe A AU - Ponnighaus JM AU - Welsh O AU - Stingl P AU - Leppard B AD - Univ Hosp, Dept Dermatol, CH-8190 Zurich, SwitzerlandReg Dermatol Training Ctr RDTC, Moshi, TanzaniaSwiss Inst Allergy & Asthma Res SIAF, Davos, SwitzerlandInst Hyg, Dept Dermatol & Sexually Transmitted Dis, Dakar, SenegalVogtland Klinikum, Dept Dermatol, Plauen, GermanyUniv Autonoma Nuevo Leon, Sch Med, Dept Dermatol, Monterrey, MexicoKlinikum Univ Munich, Dept Infect & Trop Med, Munich, GermanySchmid-Grendelmeier, P, Univ Hosp, Dept Dermatol, Gloriastr 31, CH-8190 Zurich, Switzerland TI - Tropical dermatology. Part I MH - Germany MH - Mexico|Nuevo Leon MH - Senegal MH - Switzerland MH - Tanzania PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Dermatology U5 - J;Bibliography AV - English IS - 0190-9622 UR - ISI:000177313600016 SO - Journal of the American Academy of Dermatology 2002 ;46(4):571-583 6786 UI - 11465 AU - Schmitter-Soto JJ AU - Comin FA AU - Escobar-Briones E AU - Herrera-Silveira J AU - Alcocer J AU - Suarez-Morales E AU - Elias-Gutierrez M AU - az-Arce V AU - Marin LE AU - Steinich B AD - ECOSUR, Chetumal, Quintana Roo, MexicoIPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida, Yucatan, MexicoUniv Barcelona, Dept Ecol, E-08007 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoEscuela Nacl Estudios Profes Iztacala, Lab Limnol, Proyecto CyMA, UIICSE, Tlalnepantla 54090, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUNAM, Inst Geofis, Unidad Ciencias Tierra, Queretaro 76001, MexicoSchmitter-Soto, JJ, ECOSUR, Apdo Postal 424, Chetumal, Quintana Roo, Mexico TI - Hydrogeochemical and biological characteristics of cenotes in the Yucatan Peninsula (SE Mexico) AB - Cenotes (sinkholes) are the most peculiar aquatic ecosystem of the Yucatan Peninsula (SE Mexico). They are formed by dissolution of the carbonate rock in the karstic platform of the Yucatan Peninsula. A wide morphological variety is observed from caves filled with ground water to open cenotes. In some cenotes, particularly those close to the sea, underneath the fresh water one finds saltwater, where meromixis can take place. This occurs because in the Yucatan Peninsula there is a thin lens (10s of meters thick) that floats above denser saline water. In these cenotes, a relative enrichment of sodium related to calcium is observed while conductivity increases. In contrast, a higher increase of calcium associated to sulfate is observed in cenotes located in SE Yucatan Peninsula. A marked vertical stratification of the water is established during the warm and rainy season of the year (May-October). In cenotes with good hydraulic connection with the rest of the aquifer, the water remains clear during most of the year. However, cenotes with poor hydraulic connection with the aquifer are characterized by turbid waters and very low light transparency. In this group of cenotes, the water column contains a high concentration of chlorophyll (mostly due to chlorophyceans, cyanobacteria, diatoms and dinoflagellates); the hypolimnion and the sediment are rich in organic matter and anaerobic bacteria mediated biogeochemical processes are dominant. The upper part of the cenotes walls is well illuminated and covered by a rich microbial mat. Floating macrophytes may also occupy part of the water surface in oligotrophic cenotes. A great variety of food web paths are represented in the habitats occurring in the cenotes, in which few trophic levels are involved. A few endemic species (crustaceans and fishes) have been reported from cenotes found in the Yucatan Peninsula. Because of the high organic matter input (alochthonous) and production (autochthonous) and the low water flow, cenotes can be considered heterotrophic systems MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Quintana Roo MH - Mexico|Estado De Mexico MH - Mexico|Yucatan MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000174759600019 L2 - karst;tropical limnology;sinkholes;nutrients;chlorophyll;biodiversity;COPEPODS CRUSTACEA; WATER; CAVES; FAUNA SO - Hydrobiologia 2002 ;467(1-3):215-228 6787 UI - 9593 AU - Schneider B AU - Shapiro M AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelIPN, ESFM, Dept Matemat, Mexico City, DF, MexicoSchneider, B, Ben Gurion Univ Negev, Dept Math, POB 653, IL-84105 Beer Sheva, Israel TI - Some properties of the Cauchy-type integral for the time-harmonic relativistic Dirac equation AB - In this paper we study an analogue of the Cauchy-type integral for the theory of time-harmonic solutions of the relativistic Dirac equation in case of a piece-wise Liapunov surface of integration and we prove the Sokhotski-Plemelj theorem for it as well as the necessary and sufficient condition for the possibility to extend a given Holder function from such a surface up to a solution of the relativistic Dirac equation in a domain. Formula for the square of the singular Cauchy-type integral is given. The proofs of all these facts are based on intimate relations between time-harmonic solutions of the relativistic Dirac equation and some versions of quaternionic analysis. Copyright (C) 2002 John Wiley Sons, Ltd MH - Israel MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0170-4214 UR - ISI:000179656000009 L2 - Cauchy-type integral;relativistic Dirac equation;quaternionic analysis;HELMHOLTZ SO - Mathematical Methods in the Applied Sciences 2002 ;25(16-18):1441-1463 6788 UI - 10394 AU - Schneider B AU - Shapiro M AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelIPN, ESFM, Dept Matemat, Mexico City, DF, MexicoSchneider, B, Ben Gurion Univ Negev, Dept Math, POB 653, IL-84105 Beer Sheva, Israel TI - Some properties of the Cauchy-type integral for the time-harmonic Maxwell equations AB - We study the analog of the Cauchy-type integral for the theory of time-harmonic electromagnetic fields in case of a piece-wise Liapunov surface of integration and we prove the Sokhotski-Pletnelj theorem for it as well as the necessary and sufficient condition for the possibility to extend a given pair of vector fields from such a surface up to a solution of the time-harmonic Maxwell equations in a domain. Formula for the square of the singular Cauchy-type integral is given. The proofs of all these facts are based on intimate relations between time-harmonic solutions of the Maxwell equations and some versions of quaternionic analysis MH - Israel MH - Mexico|Distrito Federal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000177631100007 L2 - LIPSCHITZ-DOMAINS; BOUNDARY; OPERATOR SO - Integral Equations and Operator Theory 2002 ;44(1):93-126 6789 UI - 10959 AU - Scholz T AU - Kuchta R AU - Salgado-Maldonado G AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicIPN, CINVESTAV, Parasitol Lab, Merida 97310, Yucatan, VenezuelaUniv S Bohemia, Fac Biol Sci, Ceske Budejovice 37005, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoScholz, T, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Cestodes of the family Dilepididae (Cestoda : Cyclophyllidea) from fish-eating birds in Mexico: a survey of species AB - A survey of adults of dilepidid tapeworms (Cyclophyllidea) from piscivorous birds from Mexico is presented on the basis of the taxonomic evaluation of freshly collected and voucher specimens. The following species are reported (first records from Mexico marked with an asterisk): Cyclustera capito (Rudolphi, 1819); C-*. ibisae (Schmidt Bush, 1972); (*)Dendrouterina ardeae Rausch, 1955; D-*. herodiae Fuhrmann, 1912; D-*. papillifera (Fuhrmann, 1908); Glossocercus auritus (Rudolphi, 1819); (*)Neogryporhynchus cheilancristrotus (Wedl, 1855); Paradilepis caballeroi Rysavy Macko, 1973; Paradilepis sp.; Parvitaenia cochlearii Coil, 1955; and Valipora mutabilis Linton, 1927. Dendrouteria herodiae is reported from America for the first time. New definitive hosts are Phalacrocorax olivaceus for C. capito, N. cheilancristrotus and P. caballeroi; Casmerodius albus and Egretta thula for G. auritus; and E. thula for D. herodiae. Data on the morphology of the rostellar hooks of all species, their hosts and distribution in Mexico are provided MH - Czech Republic MH - Mexico|Distrito Federal MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Parasitology U5 - J;Article AV - English IS - 0165-5752 UR - ISI:000175974000003 L2 - HELMINTHS; FLORIDA; EUCESTODA; PARASITES SO - Systematic Parasitology 2002 ;52(3):171-182 6790 UI - 9546 AU - Schuler RH AU - Albarran G AU - Zajicek J AU - George MV AU - Fessenden RW AU - Carmichael I AD - Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USAUniv Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCSIR, Reg Res Lab, Photochem Res Unit, Trivandrum 695019, Kerala, IndiaSchuler, RH, Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USA TI - On the addition of (OH)-O-center dot radicals to the ipso positions of alkyl-substituted aromatics: Production of 4-hydroxy-4-methyl-2,5-cyclohexadien-1-one in the radiolytic oxidation of p-cresol AB - 4-Hydroxy-4-methyl-2,5-cyclohexadien-1-one has been conclusively identified by its H-1 and C-13 NMR spectra as a significant initial product in the radiolysis of aqueous solutions of p-cresol. This product is formed as the result of oxidation of the hydroxycyclohexadienyl radicals produced by addition of similar to12% of the *OH radicals to the aromatic ring at the ipso position adjacent to the methyl group. It has a strong absorption band at 228 nin that is similar to the 246 nm band of p-benzoquinone. Its proton NMR spectrum exhibits strong coupling between two pairs of ring protons. A quartet is observed in the spectrum of the methyl-C-13 labeled product, confirming that a methyl group is attached to the dienone ring. C-13 chemical shifts and C-13-H spin-spin splittings of the dienone are reported. Although DFr calculations of the proton NMR parameters are in very good agreement with the experimental values, the calculated chemical shifts of the ring C-13 carbons are 4-8 ppm too high, indicating that the DFT calculations do not properly take into account the dienone 17 system. This conclusion is confirmed by parallel experimental and theoretical studies,of 4H-pyran-4-one that provides a model system closely related to the dienone. The observation of 4-hydroxy-4-methyl-2,5-cyclohexadien-1-one as a product in the radiolysis of aqueous solutions is important in demonstrating that addition of *OH radicals to aromatic rings at positions substituted with alkyl groups can be of appreciable importance in the *OH oxidation of aromatic substrates MH - India MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000179921000024 L2 - SPIN COUPLING-CONSTANTS; NMR SO - Journal of Physical Chemistry A 2002 ;106(50):12178-12183 6791 UI - 10961 AU - Schuler RH AU - Albarran G AD - Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSchuler, RH, Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USA TI - The rate constants for reaction of (OH)-O-center dot radicals with benzene and toluene AB - The rate constant for reaction of (OH)-O-. radical with toluene in aqueous solutions saturated with N2O or containing 0.1 M H2O2 has been determined by pulse radiolysis to be 8.1 x 10(9) 1 mol(-1) s(-1). This rate constant is comparable to the value of 7.8 x 10(9) 1 mol(-1) s(-1) for reaction with benzene determined under similar conditions. This latter rate constant provides a reference value of 1.3 x 10(9) 1 mol(-1) s(-1) with which to compare the partial rate constants for reaction of (OH)-O-. at the various positions of substituted aromatics. Comparison of the kinetic responses in the N2O and H2O2 Systems provides a direct measure of the pseudo-first-order rate constant for reaction of O-.(-) with water as 7.9 x 10(7) s(-1). (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000176050000005 L2 - benzene;toluene;pulse radiolysis;rate constants;hydroxyl radical;oxide radical anion;AQUEOUS-SOLUTION; OXIDATION; IONS; OH SO - Radiation Physics and Chemistry 2002 ;64(3):189-195 6792 UI - 11287 AU - Schulz PC AU - Morini MA AU - Palomeque M AU - Puig JE AD - Univ Nacl Sur, Dept Quim & Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Guadalajara, Dept Ingn Quim, Ctr Univ Ciencias & Ingn, Guadalajara 44430, Jalisco, MexicoSchulz, PC, Univ Nacl Sur, Dept Quim & Ingn Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - Vanadium(V)-doped MCM-41 synthesised by a novel one-step procedure AB - A novel procedure to synthesise V-doped surfactant-templated mesoporous materials in one step using a V(V) complex is described. The resulting V(V) MCM-41 material had a bimodal pore size distribution MH - Argentina MH - Mexico|Jalisco PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000175285400004 L2 - MCM-41 synthesis;vanadium MCM-41;mesopores;doped materials;DIFFUSE-REFLECTANCE SPECTROSCOPY; ZEOLITE-HOSTED MONONUCLEAR; PARTIAL OXIDATION; MESOPOROUS SILICA; VANADIA CATALYSTS; SURFACE-AREA; METHANE; ADSORPTION; PHASE SO - Colloid and Polymer Science 2002 ;280(4):322-327 6793 UI - 11175 AU - Schutt BD AU - Serano B AU - Cerro RL AU - Abraham MA AD - Univ Toledo, Dept Environm Chem & Engn, Toledo, OH 43606, USAUniv Autonoma Zacatecas, Fac Ciencias Quim, Mexico City 98600, DF, MexicoUniv Alabama, Huntsville, AL 35899, USAAbraham, MA, Univ Toledo, Dept Environm Chem & Engn, 3055 Nitschke Hall, Toledo, OH 43606 USA TI - Production of chemicals from cellulose and biomass-derived compounds through catalytic sub-critical water oxidation in a monolith reactor AB - Selective conversion of cellulose to small organic molecules, including carboxylic acids, represents a potential route for upgrading biomass resources to value-added chemical precursors. However, since biomass resources such as cellulose are not soluble in water, the use of a catalyzed system requires a novel reactor design that facilitates slurry flow. As demonstrated herein, the monolith froth reactor is uniquely suited for the conversion of solid materials in a four-phase (solid catalyst, solid reactant, gaseous reactant, and aqueous solution) reaction system. Reactions were performed using a palladium catalyst and 1000 ppm (W) Cellulose, and results were compared with previous experiments conducted over platinum. At 150degreesC, nearly 100% conversion of the cellulose was achieved in approximately 5 h, which compares favorably with results obtained using a platinum catalyst. The palladium catalyst gave a different distribution of intermediate products compared to platinum. For example, acetic acid and malic acid achieved yields of 40 and 80 ppm (w), respectively, using the palladium catalyst. The product selectivity was evaluated under pH control, through the addition of acetic or carbonic acid, and shown to have only a minor effect on the performance of the system. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0961-9534 UR - ISI:000175573200003 L2 - cellulose;monolith froth reactor;supported palladium catalyst;partial oxidation;WET AIR OXIDATION; BUBBLE-TRAIN FLOW; SELECTIVE OXIDATION; GLUCOSE-OXIDATION; METAL-CATALYSTS; ACID; CAPILLARIES; PALLADIUM SO - Biomass & Bioenergy 2002 ;22(5):365-375 6794 UI - 10288 AU - Schwarz R AU - Greiner J AU - Tovmassian GH AU - Zharikov SV AU - Wenzel W AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyUNAM, Inst Astron, Ensenada 22860, Baja California, MexicoSonneberg Observ, D-96515 Sonneberg, GermanySchwarz, R, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - A new two-pole accretion polar: RX J1846.9+5538 AB - We report the discovery of a new, bright (V similar to 17(m)) AM Her system as the optical counterpart of the soft ROSAT All-Sky-Survey source RX J1846.9+5538 (=1RXS J184659.4+553834). Optical photometric and spectroscopic follow-up observations reveal a single period of 128.7 min, consistent with a high degree of spin-orbit synchronization, and a low polar field strength (B < 20 MG) of the primary accretion region. The system was observed in optical intermediate and high states that differ by about 1 mag. These brightness variations were accompanied by a correlated change of the optical light curve, which we interpret as a switch between one- and two-pole accretion. This explanation is also supported by the X-ray light curves, which at two different epochs display emission from two equally bright accretion regions separated by &SIM; 160&DEG;. Both spots possess distinct spectral X-ray properties as seen from the X-ray hardness ratio, where the secondary accretion region appears significantly softer, thus probably indicating a higher field strength compared to the primary region. In all ROSAT pointings a deep dip is present during the primary flux maxima, very likely caused by absorption in one of the accretion streams MH - Germany MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178001100012 L2 - X-rays : stars;cataclysmic variables;accretion;stars : magnetic fields;stars : individual : RX J1846.9+5538;AM HERCULIS BINARIES; X-RAY; OPTICAL OBSERVATIONS; DISCOVERED POLAR; PERIOD GAP; QS-TEL; ROSAT; RADIATION; FIELD; HS-1023+3900 SO - Astronomy & Astrophysics 2002 ;392(2):505-514 6795 UI - 9743 AU - Schweitzer CE AU - Feldmann RM AU - Gonzalez-Barba G AU - Vega FJ AD - Kent State Univ, Dept Geol, Canton, OH 44720, USAKent State Univ, Dept Geol, Kent, OH 44242, USAUABCS, Dept Geol, La Paz 23080, BCS, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoSchweitzer, CE, Kent State Univ, Dept Geol, Stark Campus, Canton, OH 44720 USA TI - New crabs from the Eocene and Oligocene of Baja California Sur, Mexico and an assessment of the evolutionary and paleobiogeographic implications of Mexican fossil decapods AB - A new collection of fossil decapod crustaceans from the Cretaceous Rosario Formation, the Eocene Tepetate Formation and the Oligocene El Cien Formation, Baja California Sur, Mexico, has yielded two new genera and several new species, Anlydrocarcinus dantei n. gen. and sp., Levicyclus tepetate n. gen. and sp,, Eriosachila bajaensis n. sp., Oregonia spinifera n. sp., Archaeopus mexicanus n. sp., and Necronectes nodosa n. sp. Additionally, new occurrences of the previously described Lophoranina bishopi, Xandaros sternbergi, Icriocarcinus xestos, and Lobonotus mexicanus as well as Dardanus cf. D. mexicanus are reported. As part of ongoing work on global evolutionary and paleobiogeographic patterns within the Decapoda, the work has prompted a review and synthesis of decapod occurrences in the tropical and subtropical Americas including the southern United States, the Caribbean, Mexico, Central America, and northern South America. As a result of the systematic review, several new combinations are reported herein which include Eriosachila bartholomaeensis (Rathbun, 1919), Lobonotus sandersi (Blow and Manning, 1996; 1998), and Matutites americamis (Rathbun, 1935). kriocarcinus is transferred to the Goneplacidae, extending the range of that family into the Cretaceous. Most Cretaceous through Miocene tropical and subtropical American taxa appear to have originated within the area and a large number were endemic. Most of the immigrants to the central Americas appear to have evolved along North Atlantic shelves and subsequently dispersed to the Americas, probably via continental shelf routes. In addition, as demonstrated by several previous studies, decapod crustaceans appear to have evolved in numerous middle- and high- latitude areas with subsequent dispersal to lower latitudes, contrary to the long held notion that the tropics are areas of origin with subsequent dispersal to other regions. Low-latitude decapod taxa tend to remain in low-latitude areas. The Maastrichtian and the Eocene appear to have been times of elevated extinctions within the Decapoda; however, the extinction patterns for those two time intervals are very complex MH - USA MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 5 U4 - Paleontology U5 - J;Review AV - English IS - 0022-3360 UR - ISI:000179489300001 L2 - CRETACEOUS ROSARIO FORMATION; N-SP DECAPODA; NORTH-AMERICA; TEPETATE FORMATION; MIDDLE EOCENE; BRACHYURA; CRUSTACEA; WASHINGTON; FAUNA; REEVALUATION SO - Journal of Paleontology 2002 ;76(6):1-43 6796 UI - 8064 AU - Schwing FB AU - Bograd SJ AU - Collins CA AU - Gaxiola-Castro G AU - Garcia J AU - Goericke R AU - Gomez-Valdez J AU - Huyer A AU - Hyrenbach KD AU - Kosro PM AU - Lavaniegos BE AU - Lynn RJ AU - Mantyla AW AU - Ohman MD AU - Peterson WT AU - Smith RL AU - Sydeman WJ AU - Venrick E AU - Weeler PA AD - NOAA, Natl Marine Fisheries Serv, Pacific Fisheries Environm Lab, Pacific Grove, CA 93950, USAUSN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943, USACtr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Integrat Ocean Div, La Jolla, CA 92093, USAOregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331, USAPoint Reyes Bird Observ, Marine Sci Div, Stinson Beach, CA 94970, USANOAA, Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, La Jolla, CA 92037, USAPoint Reyes Bird Observ, Marine Sci Div, Stinson Beach, CA 94970, USASchwing, FB, NOAA, Natl Marine Fisheries Serv, Pacific Fisheries Environm Lab, 1352 Lighthouse Ave, Pacific Grove, CA 93950 USA TI - The state of the California Current, 2001-2002: Will the California Current System keep its cool, or is El Nino looming? AB - This report summarizes physical and biological conditions in the California Current System (CCS), from Oregon to Baja California, in 2001 and 2002. The principal sources of the observations described here are the CalCOFI (California Cooperative Oceanic Fisheries Investigations), IMECOCAL (Investigaciones Mexicanas de la Corriente de California), and U.S. GLOBEC-LTOP (Global Ecosystems Long-term Observation Program) programs. Large-scale atmospheric and oceanic conditions in the Pacific point to a fourth consecutive La Nina-like year. This has contributed to generally stronger than normal upwelling and uncharacteristically cool waters in much of the CCS, a pattern that has persisted since late 1998. Biological productivity has been generally higher as well, particularly off Oregon. Within the observed interannual fluctuations of recent years, these conditions suggest a generally elevated production off California and Oregon, but cool conditions have led to lower than normal zooplankton biomass off Baja California. Although the tropical Pacific has exhibited some indications of a developing El Nino, it is not likely to impact the CCS during the productive upwelling season of 2002. These observations are continuing evidence that a regime shift may have occurred in 1998, resulting in substantial change in ecosystem structure in the CCS. Continued monitoring and analysis of the state of the CCS in this context is needed. We outline a plan for an integrated monitoring program for the entire region, through the creation of ACCEO (Alliance for California Current Ecosystem Observation) MH - USA MH - Mexico|Baja California PB - LA JOLLA: SCRIPPS INST OCEANOGRAPHY RP - NOT IN FILE U3 - TC 17 U4 - Fisheries U5 - J;Article AV - English IS - 0575-3317 UR - ISI:000183929400004 L2 - NORTHEAST PACIFIC; COASTAL OCEAN; TRANSITION; OREGON; ZOOPLANKTON; OSCILLATION; ANOMALIES; PERIOD; EVENTS; REGIME SO - California Cooperative Oceanic Fisheries Investigations Reports 2002 ;43():31-68 6797 UI - 11203 AU - Scott SE AU - Fox MJ AU - Dunlop JS AU - Serjeant S AU - Peacock JA AU - Ivison RJ AU - Oliver S AU - Mann RG AU - Lawrence A AU - Efstathiou A AU - Rowan-Robinson M AU - Hughes DH AU - Archibald EN AU - Blain A AU - Longair M AD - Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandUniv Kent, Sch Phys Sci, Unit Space Sci & Astrophys, Canterbury CT2 7NZ, Kent, EnglandRoyal Observ, UK ATC, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Sussex, CPES, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandINAOE, Puebla 72000, MexicoJoint Astron Ctr, Hilo, HI 96720, USAUniv Cambridge, Inst Astron, Cambridge CB3 0HE, EnglandUniv Cambridge, Cavendish Lab, Cavendish Astrophys Grp, Cambridge CB3 0HE, EnglandScott, SE, Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland TI - The SCUBA 8-mJy survey - I. Submillimetre maps, sources and number counts AB - We present maps, source lists and derived number counts from the largest, unbiased, extragalactic submillimetre (submm) survey so far undertaken with the SCUBA camera on the James Clerk Maxwell Telescope (JCMT). Our maps are located in two regions of sky (ELAIS N2 and Lockman-Hole E) and cover 260 arcmin(2), to a typical rms noise level of sigma(850) similar or equal to 2.5 mJy beam(-1). We have reduced the data using both the standard JCMT SURF procedures, and our own IDL-based pipeline which produces zero-footprint maps and noise images. The uncorrelated noise maps produced by the latter approach have enabled us to apply a maximum likelihood method to measure the statistical significance of each peak in our maps, leading to properly quantified errors on the flux density of all potential sources. We detect 19 sources with signal-to-noise ratios (S/N) > 4, and 38 with S/N > 3.5. To assess both the completeness of this survey and the impact of source confusion as a function of flux density, we have applied our source-extraction algorithm to a series of simulated images. The result is a new estimate of the submm source counts over the flux-density range S-850 similar or equal to 5-15 mJy, which we compare with estimates derived by other workers, and with the predictions of a number of models. Our best estimate of the cumulative source count at S850 > 8 mJy is 320 80 per square degree. Assuming that the majority of sources he at z > 1.5, this result implies that the comoving number density of high-redshift galaxies forming stars at a rate in excess of 1000 M. yr(-1) is similar or equal to 10(-5) Mpc(-3), with only a weak dependence on the precise redshift distribution. This number density corresponds to the number density of massive ellipticals with L > 3-4L* in the present-day Universe, and is also the same as the comoving number density of comparably massive, passively evolving objects in the redshift band 1 < z < 2 inferred from recent surveys of extremely red objects. Thus the bright submm sources uncovered by this survey can plausibly account for the formation of all present-day massive ellipticals. Improved redshift constraints, and ultimately an improved measure of submm source clustering can refine or refute this picture MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 173 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000175270700005 L2 - galaxies : evolution;galaxies : formation;galaxies : starburst;cosmology : observations;infrared : galaxies;STAR-FORMATION HISTORY; HUBBLE DEEP FIELD; AREA ISO SURVEY; ULTRAVIOLET LUMINOSITY DENSITY; EXTRAGALACTIC SOURCE COUNTS; FAR-INFRARED LUMINOSITY; UNIVERSE GALAXY SURVEY; LYMAN-BREAK GALAXIES; HIGH-REDSHIFT; RADIO GALAXY SO - Monthly Notices of the Royal Astronomical Society 2002 ;331(4):817-838 6798 UI - 11556 AU - Scrosati R AD - NW Biol Res Ctr CIBNOR, La Paz 23000, Baja California, MexicoScrosati, R, Univ British Columbia, Dept Bot, Vancouver, BC V6T 1Z4, Canada TI - Morphological plasticity and apparent loss of apical dominance following the natural loss of the main apex in Pterocladiella capillacea (Rhodophyta, Gelidiales) fronds AB - In an inter-tidal population of Pterocladiella capillacea from southern Baja California, Mexico, fronds that lacked their main apex were bushier than intact fronds. A multivariate statistical analysis showed that the absence of the main apex was associated with higher frond biomass, a higher degree of branching, higher frond width, and longer main branches. The variation in frond form hen the main apex is absent might be a response to the loss of apical dominance. The potential relevance of this morphological plasticity for the survival of thalli in the intertidal zone is discussed MH - Canada MH - Mexico|Baja California PB - LAWRENCE: INT PHYCOLOGICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0031-8884 UR - ISI:000174592000012 L2 - FUNCTIONAL-MORPHOLOGY; ALGAE; GROWTH; HORMONES; SEAWEEDS; GALLS; FORM SO - Phycologia 2002 ;41(1):96-98 6799 UI - 10816 AU - Seeger T AU - Kohler T AU - Frauenheim T AU - Grobert N AU - Terrones M AU - Seifert G AU - Ruhle M AD - Max Planck Inst Met Res, D-70569 Stuttgart, GermanyUniv Gesamthsch Paderborn, D-4790 Paderborn, GermanyUniv Sussex, Sch Chem Phys & Environm Sci, Brighton, E Sussex, EnglandIPICYT, San Luis Potosi, MexicoGrobert, N, Max Planck Inst Met Res, Heisenbergstr 3, D-70569 Stuttgart, Germany TI - SiO2-coated carbon nanotubes: theory and experiment AB - A novel route is reported for the processing of nanocomposites consisting of multi-walled carbon nanotubes (MWNT) embedded in amorphous SiO2. SiO2 is used for the sintered composite matrix and SiOx either for the unsintered or for the interface region with the MWNT. The material has been characterized by high-resolution transmission electron microscopy, high-resolution electron energy loss spectroscopy and thermal gravimetric analysis. Based on our observations, theoretical simulations were performed which were based on tight binding calculations. Models are proposed which acount for a stable SiOx/tube interface MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi PB - MUNICH: CARL HANSER VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0044-3093 UR - ISI:000176310600016 L2 - carbon nanotubes;SiO2;SiOx;nanocomposites;COMPOSITES; TOUGHNESS; TEMPLATES; STRENGTH; NANORODS SO - Zeitschrift fur Metallkunde 2002 ;93(5):455-458 6800 UI - 11960 AU - Seeger T AU - Kohler T AU - Frauenheim T AU - Grobert N AU - Ruhle M AU - Terrones M AU - Seifert G AD - Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Res, D-70174 Stuttgart, GermanyUniv Gesamthsch Paderborn, D-33098 Paderborn, GermanyIPICYT, San Luis Potosi 78210, MexicoTerrones, M, Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England TI - Nanotube composites: novel SiO2 coated carbon nanotubes AB - A novel route to nanocomposites consisting of multi-walled carbon nanotubes (MWNTs) embedded in amorphous SiOx is reported; the material has been characterised by high resolution transmission electron microscopy (HRTEM) and high resolution electron energy loss spectroscopy (HREELS); for the first time, and based on our observations, we propose theoretical models acounting for stable SiOx/tube interfaces using density functional based tight binding (DFTB) MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 43 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000173465800013 L2 - TEMPLATES; STRENGTH; NANORODS SO - Chemical Communications 2002 ;(1):34-35 6801 UI - 11714 AU - Seelenfreund A AU - Miranda J AU - Dinator MI AU - Morales JR AD - Univ Acad Humanismo Cristiano, Santiago 2015, ChileUniv Nacl Autonoma Mexico, Inst Fis, Circuito Invest Cient, Mexico City 04510, DF, MexicoUniv Chile, Fac Ciencias, Dept Fis, Santiago 3621, ChileSeelenfreund, A, Univ Acad Humanismo Cristiano, Santiago 2015, Chile TI - The provenance of archaeological obsidian artifacts from Northern Chile determined by source-induced X-ray fluorescence AB - A study of provenance of obsidian artifacts from "site 25-Las Estacas", Quebrada de Jorquera (Copiapo, Northern Chile) was carried out by means of X-ray fluorescence, using radioactive sources. Obsidian samples from different Chilean geological regions, located in South Central Chile (Laguna del Maule volcanic area, sources of La Coloradas and La Plata), "Radal Siete Tazas" and the North of Chile (Copiapo Volcano) were analyzed. The analysis was performed using Cd-109 and Am-241 annular excitation sources and X-ray fluorescence. This allowed the determination of Fe, Cu, Rb, Sr, Y, Zr, and Ba concentrations on samples of ground obsidian from the aforementioned sites. The measured Rb, Sr, and Zr concentrations were used to construct discriminant diagrams, which clearly showed clustering of the samples from the different sources, and the association of the archaeological obsidian sample to the Copiapo Volcano source, which is geographically close to the site MH - Chile MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000174041000003 SO - Journal of Radioanalytical and Nuclear Chemistry 2002 ;251(1):15-19 6802 UI - 11473 AU - Sellen DW AU - Thompson AL AU - Neufeld L AU - Grajeda R AU - Martorell R AD - Emory Univ, Dept Anthropol, Atlanta, GA 30322, USANatl Inst Publ Hlth, Div Nutr, Cuernavaca, Morelos, MexicoEmory Univ, Dept Int Hlth, Atlanta, GA 30322, USA TI - Causes and consequences of non-exclusive breastfeeding in the first week of life among Guatemalan infants MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174533603372 SO - Faseb Journal 2002 ;16(4):A607-A607 6803 UI - 9740 AU - Seminoff JA AU - Resendiz A AU - Nichols WJ AD - Univ Florida, Archie Carr Ctr Sea Turtle Res, Gainesville, FL 32611, USAUniv Florida, Dept Zool, Gainesville, FL 32611, USAInst Nacl Ecol, Direcc Gen Vida Silvestre, Secretaria Medio Ambiente & Recursos Nat, Ensenada, Baja California, MexicoCalif Acad Sci, Dept Herpetol, San Francisco, CA 94118, USAWildcoast Int Conservat Team, Davenport, CA 95017, USASeminoff, JA, NOAA, SW Fisheries Sci Ctr, Natl Marine Fisheries Serv, 8604 La Jolla Shores Dr, La Jolla, CA 92037 USA TI - Home range of green turtles Chelonia mydas at a coastal foraging area in the Gulf of California, Mexico AB - The green turtle Chelonia mydas is a circumglobal species that is susceptible to overexploitation as a food resource and incidental mortality in fisheries. Efforts to recover regional green turtle populations have been hampered by a lack of information on their biology. In particular, turtle movements and home ranges in neritic foraging habitats are not well understood. Thus, wildlife managers cannot accurately determine the habitat needs of green turtle populations. To address these understudied aspects, we carried out the first ever investigation of green turtle home range in neritic foraging habitats of the eastern Pacific Ocean. Twelve turtles, ranging from 50.9 to 82.5 cm in straight carapace length and from 17 to 70 kg in mass, were tracked with radio and sonic telemetry for 34 to 96 d at the Bahia de los Angeles foraging area in the Gulf of California, Mexico. Home range areas determined with minimum convex polygon and fixed kernel density estimator methods ranged from 584 to 3908 ha (mean = 1662 +/- 324 ha) and 409 to 3231 ha (mean = 1537 +/- 280 ha), respectively. There was no evidence that straight carapace length, mass, sex, tracking duration or number of re-sightings influenced the size of the home range. Green turtle home ranges contained from 1 to 3 activity centers ranging from 3.8 to 642.2 ha in area (mean = 178.8 +/- 62.0 ha). Turtles were re-sighted in all depth-class regions (0 to 10 m to 40+ m) in the study area but were not found with equal frequency among these regions. The distribution of re-sightings among depth classes varied significantly between diurnal (05:00 to 18:59 h) and nocturnal (19:00 to 04:59 h) periods. While the greatest frequency of diurnal re-sightings occurred in the 10 to 20 m depth class, nocturnal encounters were most frequent in the 0 to 10 m depth class. This study shows that Bahia de los Angeles remains an important feeding ground; thus, underscoring the need to develop conservation strategies that address the impacts of ongoing commercial marine-algae harvests and net fisheries that threaten green turtles in this region MH - USA MH - Mexico|Baja California PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 11 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000179463800022 L2 - Eastern Pacific Ocean;Sea of Cortez;black turtle;wildlife telemetry;fixed kernel density estimator;minimum convex polygon;ASCENSION ISLAND; HABITAT USE; MOVEMENTS; BEHAVIOR; ESTIMATORS; TELEMETRY; PATTERNS SO - Marine Ecology-Progress Series 2002 ;242():253-265 6804 UI - 10171 AU - Seminoff JA AU - Resendiz A AU - Nichols WJ AD - Univ Arizona, Wildlife & Fisheries Sci Sch Renewable Nat Resour, Tucson, AZ 85721, USACtr Reg Invest Pesquerra, Ensenada, Baja California, MexicoCalif Acad Sci, Dept Herpetol, San Francisco, CA 94118, USAWildcoast, Davenport, CA 95017, USASeminoff, JA, Univ Florida, Dept Zool, Archie Carr Ctr Sea Turtle Res, Dept Zool, POB 118525, Gainesville, FL 32611 USA TI - Diet of East Pacific green turtles (Chelonia mydas) in the central Gulf of California, Mexico AB - We studied the diet of green sea turtles (Chelonia mydas) at Bahia de los Angeles in the Gulf of California, Mexico. From 1995-1999, we collected esophageal lavage and fecal samples from live-captured turtles and analyzed stomach contents from stranded carcasses encountered in the study area. Foods ingested did not vary with carapace length. Turtles consumed diverse marine algae, with the filamentous red alga Gracilariopsis lemaneiformis the most abundant; other common genera included Gracilaria, Codium, Ulna, and Chaetomorpha. Turtles also augmented their diet with animal matter; 25 nonalga food items were identified, including sponges, tube worms, sea pens, and sea hares. Substratum and anthropogenic debris such as plastic bags and nylon cord were commonly recovered in diet samples MH - USA MH - Mexico|Baja California PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 8 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000178328600015 L2 - SEA-TURTLES; DIGESTIVE FERMENTATION; ECOLOGY SO - Journal of Herpetology 2002 ;36(3):447-453 6805 UI - 10359 AU - Seminoff JA AU - Resendiz A AU - Nichols WJ AU - Jones TT AD - Univ Florida, Archie Carr Ctr Sea Turtle Res, Gainesville, FL 32611, USAUniv Florida, Dept Zool, Gainesville, FL 32611, USACtr Reg Invest Pesquera, Ensenada, Baja California, MexicoWildcoast, Davenport, CA 95017, USACalif Acad Sci, Dept Herpetol, San Francisco, CA 94118, USAFlorida Atlantic Univ, Dept Biol, Boca Raton, FL 33431, USASeminoff, JA, Univ Florida, Archie Carr Ctr Sea Turtle Res, POB 118525, Gainesville, FL 32611 USA TI - Growth rates of wild green turtles (Chelonia mydas) at a temperate foraging area in the Gulf of California, Mexico AB - Growth rates recorded between 1995 and 2001 for green turtles in the central Gulf of California were analyzed using nonparametric regression modeling. A mixed longitudinal sampling design provided 21 growth rate estimates from 19 turtles recaptured at intervals greater than or equal to11 months. Initial straight carapace length (SCL) off turtles ranged from 58.6-93.8 cm. Growth rates ranged from 0.2 cm/yr to 3.4 cm/yr. The size-specific growth rate function was nonmonotonic, rising steadily from slightly under 1.0 cm/yr in the smallest sizes (approximately 60 cm SCL) to a maximum growth rate of 1.5 cm/yr at about 85 cm SCL, then declining to just over 1 cm/yr for turtles > 90 cm SCL. Mean annual growth was 1.4 cm/yr. We estimate turtles require 9-21 yr in this neritic habitat to attain maturity. These data represent the first information on wild green turtle growth in temperate regions of the Eastern Pacific Ocean MH - USA MH - Mexico|Baja California PB - CHARLESTON: AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS RP - NOT IN FILE U3 - TC 6 U4 - Zoology U5 - J;Article AV - English IS - 0045-8511 UR - ISI:000177687400004 L2 - GREAT-BARRIER-REEF; SEA-TURTLES; CARETTA-CARETTA; ABUNDANCE; PATTERNS; ISLANDS; CURVE SO - Copeia 2002 ;(3):610-617 6806 UI - 10174 AU - Sen KD AU - Mayer B AU - Schmidt PC AU - Garza J AU - Vargas R AU - Vela A AD - Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, IndiaTech Univ Darmstadt, Inst Phys Chem, D-64287 Darmstadt, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoSen, KD, Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, India TI - Static dipole and quadrupole polarizability of confined hydrogen atom with Z = N/3 (N=1-5) AB - First calculations of static dipole and quadrupole polarizability for the spherically confined hydrogen atom within the hard boundaries with nuclear charge Z = N/3, N = 1-5, are carried out using the Sternheimer perturbation-numerical procedure. The polarizability values strongly depend upon the radius of confinement. The polarizability calculations for the exotic hydrogenic ions with nuclear charges 1/3, 2/3, 4/3 and 5/3 exhibit strong dependence on the radius of confinement and the nuclear charge. (C) 2002 Wiley Periodicals, Inc MH - Germany MH - India MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000178126500002 L2 - confined atoms;static polarizabilities;quark atoms;reactivity of exotic atoms;COMPRESSED ATOMS; IONIZATION RADII; ELECTRONEGATIVITY; HARDNESS; BOXES SO - International Journal of Quantum Chemistry 2002 ;90(2):491-496 6807 UI - 11151 AU - Sen KD AU - Garza J AU - Vargas R AU - Aquino N AD - Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, IndiaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoSen, KD, Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, India TI - Static dipole polarizability of shell-confined hydrogen atom AB - Using the Sternheimer perturbation-numerical procedure, calculations of static dipole polarizability are reported for the shell-confined hydrogen atom as defined by two impenetrable concentric spherical walls. Unusually high polarizability states are predicted for the hydrogen atom as the inner sphere radius is increased to larger values inside the outer sphere of a constant radius. Implications of this model in mimicking internal compression leading to the metallic behaviour of the shell-confined hydrogen atoms are discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000175546500010 L2 - confined atoms static polarizabilities;reactivity of exotic atoms;encapsulated molecules;insulator-metal transition;COMPRESSED ATOMS; IONIZATION RADII; ELECTRON SYSTEMS; ENERGY; INEQUALITIES; BOXES SO - Physics Letters A 2002 ;295(5-6):299-304 6808 UI - 8373 AU - Sen SS AU - Geling O AU - Messina OD AU - Morales-Torres J AU - Riera G AU - ngulo-Solimano JM AU - Neto JFM AU - Frisoli A AU - Castro RS AU - Reginster JY AD - Merek & Co Inc, Whitehouse Stn, NJ, USARutgers State Univ, Piscataway, NJ 08855, USAC Argerich Hosp, Dept Rheumotol, Buenos Aires, DF, ArgentinaHosp Aranda Parra, Fac Med Leon, Leon, GTO, MexicoUniv Carabobo, Dept Med, Valencia, VenezuelaHosp Cent Fuerza, Aerea Lima, PeruUNICAMP, Campinas, SP, BrazilHosp Dr RA Calderon Guardia, Div Rheumatol, Dept Med, San Jose, Costa RicaUniv Liege, WHO Collaborat Ctr Publ Hlth Aspects Rheumat Diso, Liege, Belgium TI - A risk assessment tool (OsteoRisk) for identifying Latin American women with osteoporosis MH - Argentina MH - Belgium MH - Brazil MH - Costa Rica MH - Mexico|Guanajuato MH - Peru MH - USA MH - Venezuela PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100066 SO - Osteoporosis International 2002 ;13():S26-S27 6809 UI - 8374 AU - Sen SS AU - Geling O AU - Messina OD AU - Morales-Torres J AU - Riera G AU - ngulo-Solimano JM AU - Neto JFM AU - Frisoli A AU - Castro RS AU - Reginster JY AD - Merek & Co Inc, Whitehouse Stn, NJ, USARutgers State Univ, Piscataway, NJ 08855, USAC Argerich Hosp Buenos Aires, Dept Rheumatol, Buenos Aires, DF, ArgentinaFac Med, Leon, SpainHosp Aranda Parra Leon, Mexico City, DF, MexicoUniv Carabobo, Dept Med, Valencia, VenezuelaHosp Cent Fuerza, Aerea Lima, PeruUNICAMP, Campinas, SP, BrazilUNIFESP, EPM, Dept Med, Disciplina Reumatol, Sao Paulo, BrazilHosp Dr RA Calderon Guardia, San Jose, Costa RicaUniv Liege, WHO Collaborating Ctr Publ Hlth Aspects Rheumat D, Liege, Belgium TI - Comparison of body weight and body mass index as predictors for osteoporosis among postmenopausal Latin American women MH - Argentina MH - Belgium MH - Brazil MH - Costa Rica MH - Mexico|Distrito Federal MH - Peru MH - Spain MH - USA MH - Venezuela PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100067 SO - Osteoporosis International 2002 ;13():S27-S27 6810 UI - 8375 AU - Sen SS AU - Geling O AU - Messina OD AU - Morales-Torres J AU - Riera G AU - ngulo-Solimano JM AU - Neto JFM AU - Frisoli A AU - Castro RS AU - Reginster JY AD - Merck & Co Inc, Whitehouse Stn, NJ, USARutgers State Univ, Piscataway, NJ 08855, USAC Argerich Hosp Buenos Aires, Dept Rheumatol, Buenos Aires, DF, ArgentinaHosp Aranda Parra, Fac Med Leon, Leon, GTO, MexicoUniv Carabobo, Dept Med, Valencia, VenezuelaHosp Cent Fuerza, Lima, PeruUNICAMP, Campinas, SP, BrazilHosp Dr RA Calderon Guardia, Div Rheumatol, Dept Med, San Jose, Costa RicaUniv Liege, WHO Collaborat Ctr Publ Hlth Aspects Rheumat Diso, Liege, Belgium TI - Identification of key predictors for osteoporosis through use of different analytical techniques MH - Argentina MH - Belgium MH - Brazil MH - Costa Rica MH - Mexico|Guanajuato MH - Peru MH - USA MH - Venezuela PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100068 SO - Osteoporosis International 2002 ;13():S27-S27 6811 UI - 8376 AU - Sen SS AU - Geling O AU - Messina OD AU - Morales-Torres J AU - Riera G AU - ngulo-Solimano JM AU - Neto JFM AU - Frisoli A AU - Castro RS AU - Reginster JY AD - Merck & Co Inc, Whitehouse Stn, NJ, USARutgers State Univ, Piscataway, NJ 08855, USAC Argerich Hosp, Dept Rheumatol, Buenos Aires, DF, ArgentinaHosp Aranda Parra, Fac Med Leon, Leon, GTO, MexicoUniv Carabobo, Dept Med, Valencia, VenezuelaHosp Cent Fuerza Aerea, Lima, PeruUNICAMP, Campinas, SP, BrazilUNIFESP, EPM, Dept Med, Disciplina Reumatl, San Jose, Costa RicaUniv Liege, WHO Collaborat Ctr Publ Hlth Aspects Rheumat Diso, B-4000 Liege, Belgium TI - Comparison of the OsteoRisk, an osteoporosis risk assessment tool in Latin America, with the osteoporosis self-assessment tool (OST) MH - Argentina MH - Belgium MH - Brazil MH - Costa Rica MH - Mexico|Guanajuato MH - Peru MH - USA MH - Venezuela PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000179698100069 SO - Osteoporosis International 2002 ;13():S27-S28 6812 UI - 10818 AU - Sepulveda-Amor J AU - Valdespino-Gomez JL AU - Garcia-Garcia MD AU - Bennett J AU - Islas-Romero R AU - Echaniz-Aviles G AU - de Castro JF AD - Natl Inst Publ Hlth, Inst Nacl Salud Publ, Escuela Salud Publ Mexico, Cuernavaca 62508, Morelos, MexicoEmory Univ, Atlanta, GA 30322, USAValdespino-Gomez, JL, Natl Inst Publ Hlth, Inst Nacl Salud Publ, Escuela Salud Publ Mexico, Ave Univ 655, Cuernavaca 62508, Morelos, Mexico TI - A randomized trial demonstrating successful boosting responses following simultaneous aerosols of measles and rubella (MR) vaccines in school age children AB - The reactogenicity and immunogenicity of combined measles and rubella (MR) booster vaccination, via aerosol and subcutaneous routes, was assessed in 562 healthy children. Rates of rubella seroconversion and geometric mean titers (GMT) were similar for both routes. Races of measles PN seroconversion, GMT and measles ELISA post-vaccination seropositivity and seroconversion rate were each higher for aerosol vaccine (54%, 3928 IU/l, 99.6 and 98.8%), than for subcutaneous vaccine (7%, 866 IU/l, 92.2 and 82.4%) (P < 0.01). Reactogenicity was higher for subcutaneous vaccine (P < 0.05). This study demonstrates that aerosol vaccine was more immunogenic for measles antibodies, and equally immunogenic for rubella antibodies. Aerosol vaccine was less reactogenic. (C) 2002 Elsevier Science Ltd. All fights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 27 U4 - Immunology;Medicine, Research & Experimental;Veterinary Sciences U5 - J;Article AV - English IS - 0264-410X UR - ISI:000176538600020 L2 - measles;rubella;aerosol administration;SUBCUTANEOUS ROUTES; VACCINATION; IMMUNIZATION; ANTIBODY; VIRUS SO - Vaccine 2002 ;20(21-22):2790-2795 6813 UI - 10808 AU - Serkin VN AU - Hasegawa A AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72001, MexicoSoliton Commun, Higashiyama Ku, Kyoto 6050035, JapanSerkin, VN, Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72001, Mexico TI - Exactly integrable nonlinear Schrodinger equation models with varying dispersion, nonlinearity and gain: Application for soliton dispersion managements AB - We show that the methodology based on the generalized inverse scattering transform (IST) concept provides a systematic way to discover the novel exactly integrable nonlinear Schrodinger equation models with varying dispersion, nonlinearity and gain or absorption. The fundamental innovation of the present approach is to notice that it is possible both to allow for a variable spectral parameter with new dependent variables and to apply of the famous "moving in time focuses" concept of the self-focusing theory to the IST formalism. We show that for nonlinear optics this algorithm is a useful tool to design novel dispersion managed fiber transmission lines and soliton lasers. Fundamental soliton management regimes are predicted MH - Japan MH - Mexico|Puebla PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 35 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 1077-260X UR - ISI:000176680400004 L2 - dispersion managed solitons;inverse scattering transforin method;soliton-based fiber optics communications;soliton management;solitons;OPTICAL FIBERS; EVOLUTION EQUATIONS; DIELECTRIC FIBERS; NONUNIFORM MEDIA; PULSE-TRAIN; LONG FIBERS; BLOCH WAVES; PROPAGATION; COMPRESSION; GENERATION SO - Ieee Journal of Selected Topics in Quantum Electronics 2002 ;8(3):418-431 6814 UI - 9087 AU - Serrano MA AU - Carver DL AU - de Oca CM AD - Louisiana State Univ, Dept Comp Sci, Baton Rouge, LA 70803, USACtr Invest Matemat, Guanajuato 36000, MexicoCarver, DL, Louisiana State Univ, Dept Comp Sci, Baton Rouge, LA 70803 USA TI - Reengineering legacy systems for distributed environments AB - In the last decade, we have seen an increasing use of both the object-oriented paradigm and distributed systems. As a result, there is increasing interest in migrating and reengineering legacy systems to these new hardware technologies and software development paradigms. We define a reengineering environment that assists with the migration of legacy systems to distributed object environments. The reengineering environment includes the methodology and an integrated set of tools that support the implementation of the methodology. The methodology consists of multiple phases. First, we use reverse engineering techniques for program comprehension and design recovery. We then decompose the system into a hierarchy of subsystems by defining relationships between the entities of the underlying paradigm of the legacy system. The decomposition is driven by data mining, software metrics, and clustering techniques. Next, if the underlying paradigm of the legacy system is not object-based, we perform object-based adaptations on the subsystems. We then create components by wrapping objects and defining an interface. Finally, we allocate components to different sites by specifying the requirements of the system and characteristics of the network as an integer-programming model that minimizes the remote communication. We use middleware technologies for the implementation of the distributed object system. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Guanajuato MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Software Engineering;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0164-1212 UR - ISI:000181172900004 L2 - reengineering;legacy systems;distributed systems;OBJECT-ORIENTED DESIGN; METRICS SO - Journal of Systems and Software 2002 ;64(1):37-55 6815 UI - 10605 AU - Servin M AU - Davila A AU - Quiroga JA AD - Ctr Invest & Opt AC, Guanajuato 37150, MexicoUniv Complutense Madrid, Dept Opt, E-28040 Madrid, SpainServin, M, Ctr Invest & Opt AC, Apartado Postal 1-948, Guanajuato 37150, Mexico TI - Extended-range temporal electronic speckle pattern interferometry AB - In recent years the availability of high-speed digital video cameras has motivated the study of electronic speckle pattern interferometry (ESPI) in the time domain. To this end a properly sampled temporal sequence off-fringe patterns is used to analyze the temporal experiment. Samples of temporal speckle images must fulfill the Nyquist criteria over the time axis. When the transient phenomena understudy are too fast, the required sampling frequency over time may not be fulfilled. In that case one needs to extend the measuring range of the algorithm used to extract the modulating phase. We analyze how to use short laser pulses or short video acquisition times with fairly long temporal separation among them to estimate the modulating phase of a dynamic ESPI experiment. The only requirement is that the modulating phase being estimated be properly sampled in the spatial domain. (C) 2002 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000177185800015 L2 - DISPLACEMENT MEASUREMENT; PHASE; CAMERA SO - Applied Optics 2002 ;41(22):4541-4547 6816 UI - 10510 AU - Sessitsch A AU - Howieson JG AU - Perret X AU - Antoun H AU - Martinez-Romero E AD - ARC Seibersdorf Res GmbH, Div Environm & Life Sci, A-2444 Seibersdorf, AustriaMurdoch Univ, Ctr Rhizobium Studies, Murdoch, WA 6150, AustraliaUniv Geneva, Lab Biol Mol Plantes Super, CH-1292 Geneva, SwitzerlandUniv Laval, Quebec City, PQ, CanadaUNAM, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca, Morelos, MexicoSessitsch, A, ARC Seibersdorf Res GmbH, Div Environm & Life Sci, A-2444 Seibersdorf, Austria TI - Advances in Rhizobium research AB - Rhizobia are well known for their capacity to establish a symbiosis with legumes. They inhabit root nodules, where they reduce atmospheric nitrogen and make it available to the plant. Biological nitrogen fixation is an important component of sustainable agriculture, and rhizobial inoculants have been applied frequently as biofertilizers. In this review we present recently developed technologies and strategies for selecting quality inoculant strains by taking into consideration the complex interaction between the edaphic environment with the genotypes of both the legume and its microsymbiont. Enhanced competitive ability in an inoculant strain is a key requirement for successful colonization of plant roots, nodule formation, and subsequent N-2-fixation. We discuss several avenues for the management and manipulation of rhizobial competition as well as genes that influence competition in the rhizosphere. The use of molecular techniques has greatly contributed to our knowledge of nodule-bacterial diversity and phylogeny. Approaches to the study of rhizobial diversity as well as mechanisms for the evolutionary diversification of nodulating bacteria are presented. Rhizobium genomes ranging from 5.5 to 9 Mb have been sequenced recently and deposited in public databases. A comparison of sequence data has led to a better understanding of genes involved in the symbiotic process as well as possible mechanisms responsible for horizontal transfer of genetic elements and symbiosis genes among rhizobia. Furthermore, rhizobia are frequent rhizosphere colonizers of a wide range of plants and may also inhabit nonleguminous plants endophytically. In these rhizospheric and endophytic habitats they may exhibit several plant growth-promoting effects, such as hormone production, phosphate solubilization, and the suppression of pathogens MH - Australia MH - Austria MH - Canada MH - Mexico|Morelos MH - Switzerland PB - BOCA RATON: CRC PRESS LLC RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences U5 - J;Review AV - English IS - 0735-2689 UR - ISI:000177316800002 L2 - biological nitrogen fixation;rhizobial competition;diversity;genome structure;plant growth promotion;LEGUMINOSARUM BV-TRIFOLII; RIBOSOMAL-RNA GENE; ROOT-NODULE BACTERIA; BIOLOGICAL NITROGEN-FIXATION; BRADYRHIZOBIUM-JAPONICUM STRAINS; SYMBIONT SINORHIZOBIUM-MELILOTI; CLOSE PHYLOGENETIC RELATIONSHIP; GROWTH PROMOTING RHIZOBACTERIA; NATURAL ENDOPHYTIC ASSOCIATION; PLASMID-REPLICATION SEQUENCES SO - Critical Reviews in Plant Sciences 2002 ;21(4):323-378 6817 UI - 8131 AU - Shakhmatov D AU - Tkachenko M AD - Ehime Univ, Fac Sci, Dept Math Sci, Matsuyama, Ehime 7908577, JapanUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, Mexico TI - A compact Hausdorff topology that is a T-1-complement of itself AB - Topologies tau(1) and tau(2) on a set X are called T-1-complementary tau(1) boolean AND tau(2) = {X \ F : F subset of X is finite} boolean OR {0} and tau(1) boolean OR tau(2) is a subbase for the discrete topology on X. Topological spaces (X, tau(X)) and (Y, tau(Y)) are called T-1-complementary provided that there exists a bijection f : X --> Y such that tau(X) and {f(-1)(U) : U is an element of tau(Y)} are T-1-complementary topologies on X. We provide an example of a compact Hausdorff space of size 2(c) which is T-1-complementary to itself (c denotes the cardinality of the continuum). We prove that the existence of a compact Hausdorff space of size c that is T-1-complementary to itself is both consistent with and independent of ZFC. On the other hand, we construct in ZFC a countably compact Tikhonov space of size c which is T-1-complementary to itself and a compact Hausdorff space of size c which is T-1-complementary to a countably compact Tikhonov space. The last two examples have the smallest possible size: It is consistent with ZFC that c is the smallest cardinality of an infinite set admitting two Hausdorff T-1-complementary topologies [8]. Our results provide complete solutions to Problems 160 and 161 (both posed by S. Watson [14]) from Open Problems in Topology (North-Holland, 1990) MH - Japan MH - Mexico|Distrito Federal PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0016-2736 UR - ISI:000183832400006 L2 - T-1-complementary;transversal;T-1-independent;compact;countably compact;self-complementary;sequential;subsequential;convergent sequence SO - Fundamenta Mathematicae 2002 ;175(2):163-173 6818 UI - 10776 AU - Shamim EA AU - Rider LG AU - Pandey JP AU - O'Hanlon TP AU - Jara LJ AU - Samayoa EA AU - Burgos-Vargas R AU - Vazquez-Mellado J AU - cocer-Varela J AU - Salazar-Paramo M AU - Kutzbach AG AU - Malley JD AU - Targoff IN AU - Garcia-De La Torre I AU - Miller FW AD - NIEHS, Environm Autoimmun Grp, Off Clin Res, NIH, Bethesda, MD 20892, USAUS FDA, Ctr Biol Evaluat & Res, Bethesda, MD, USAMed Univ S Carolina, Charleston, SC 29425, USAHosp Especialidades Ctr Med La Raza, Mexico City, DF, MexicoHosp Gen San Juan de Dios, Ssn Juan De Dios, GuatemalaUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Occidente, Inst Mexicano Seura Social, Unidad Invest Med & Epidemiol, Guadalajara, Jalisco, MexicoUniv Francisco Marrequin, Guatemala City, GuatemalaNIH, Ctr Informat Technol, Bethesda, MD, USAUniv Oklahoma, Med Sci Ctr, Vet Affairs Med Ctr, Oklahoma City, OK, USAOklahoma Med Res Fdn, Oklahoma City, OK 73104, USAHosp Gen Occidente Secretaria Salud, Guadalajara, Jalisco, MexicoShamim, EA, NIEHS, Environm Autoimmun Grp, Off Clin Res, NIH, 9 Mem Dr,Room 1W101,MSC 0958, Bethesda, MD 20892 USA TI - Differences in idiopathic inflammatory myopathy phenotypes and genotypes between Mesoamerican Mestizos and North American Caucasians - Ethnogeographic influences in the genetics and clinical expression of myositis AB - Objective. As part of a larger, worldwide study of the ethnogeography of myositis, we evaluated the clinical, serologic, and immunogenetic features of Mestizo (Mexican and Guatemalan) and North American Cancasian patients with idiopathic inflammatory myopathy (IIM). Methods. Clinical manifestations, autoantibodies, HLA-DRB1 and DQA1 alleles, and immunoglobulin Gm/Km allotypes were compared between 138 Mestizos with IIM and 287 Caucasians with IIM, using the same classification criteria and standardized questionnaires. Results. IIM in Mestizo patients was characterized by a higher proportion of dermatomyositis (69% of adult Mestizos versus 35% of adult Caucasians; P < 0.001) and anti-Mi-2 autoantibodies (30% versus 7% of adults, respectively, and 32% versus 4% of children, respectively; P < 0.01). Genetic risk factors also differed in these populations. Whereas Mestizos had no HLA risk factors for IIM, HLA-DRBI*0301, the linked allele DQA1*0501, and DRB1 alleles sharing the first hypervariable region motif (EYSTS13)-E-9 were major risk factors in Caucasian patients with IIM. Furthermore, different HLA-DRB1 and DQA1 alleles were associated with anti-Mi-2 autoantibodies (DRB1*04 and DQA1*03 in Mestizos and DRB1*07 and DQA1*02 in Caucasians). Immunoglobulin gamma-chain allotypes Gm(1), Gm(17) (odds ratio for both 11.3, P = 0.008), and Gm(21) (odds ratio 7.3, P = 0.005) and kappa-chain allotype Km(3) (odds ratio 7.3, P = 0.005) were risk factors for IIM in Mestizos; however, no Gull or Km allotypes were risk or protective factors in Caucasians. In addition, Gull and Km phenotypes were unique risk factors (Gm 1,3,17 5,13,21 and Gm 1,17 23 21 and Km 3,3) or protective factors (Km 1,1) for the development of myositis and anti-Mi-2 autoantibodies (Gm 1,2,3,17 23 5,13,21) in adult Mestizos. Conclusion. IIM in Mesoamerican Mestizos differs from IIM in North American Caucasians in the frequency of phenotypic features and in the immune-response genes predisposing to and protecting from myositis and anti-Mi-2 autoantibodies at 4 chromosomal loci. These and other data suggest the likelihood that the expression of IIM is modulated by different genes and environmental exposures around the world MH - Guatemala MH - USA MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 17 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000176773200023 L2 - INCLUSION-BODY MYOSITIS; CLASS-II ALLELES; JUVENILE DERMATOMYOSITIS; RHEUMATOID-ARTHRITIS; ETHNIC-GROUPS; AUTOANTIBODIES; ASSOCIATION; DISEASES; ONSET; IMMUNOGENETICS SO - Arthritis and Rheumatism 2002 ;46(7):1885-1893 6819 UI - 12057 AU - Shang H AU - Glassgold AE AU - Shu FH AU - Lizano S AD - Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, MexicoShang, H, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - Heating and ionization of X-winds AB - In order to compare the X-wind with observations, one needs to be able to calculate its thermal and ionization properties. We formulate the physical basis for the streamline-by-streamline integration of the ionization and heat equations of the steady X-wind. In addition to the well-known processes associated with the interaction of stellar and accretion funnel hot spot radiation with the wind, we include X-ray heating and ionization, mechanical heating, and a revised calculation of ambipolar diffusion heating. The mechanical heating arises from fluctuations produced by star-disk interactions of the time-dependent X-wind that are carried by the wind to large distances where they are dissipated in shocks, MHD waves, and turbulent cascades. We model the time-averaged heating by the scale-free volumetric heating rate, Gamma(mech) = alpharhonu(3)s(-1), where rho and v are the local mass density and wind speed, respectively, s is the distance from the origin, and alpha is a phenomenological constant. When we consider a partially revealed but active young stellar object, we find that choosing alpha similar to 10(-3) in our numerical calculations produces temperatures and electron fractions that are high enough for the X-wind jet to radiate in the optical forbidden lines at the level and on the spatial scales that are observed. We also discuss a variety of applications of our thermal-chemical calculations that can lead to further observational checks of X-wind theory MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 66 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173166900030 L2 - accretion, accretion disks;stars : formation;stars : winds, outflows;X-rays : stars;MAGNETOCENTRIFUGALLY DRIVEN FLOWS; YOUNG STELLAR OBJECTS; T-TAURI STARS; RAY IONIZATION; MUTUAL NEUTRALIZATION; PROTON COLLISIONS; PROTOSTELLAR JETS; MOMENTUM-TRANSFER; THERMAL STRUCTURE; CROSS-SECTIONS SO - Astrophysical Journal 2002 ;564(2):853-876 6820 UI - 10062 AU - Shapiro NM AU - Olsen KB AU - Singh SK AD - Univ Nacl Autonoma Mexico, Dept Sismol & Vulcanol, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif Santa Barbara, Inst Crustal Studies, Santa Barbara, CA 93106, USAShapiro, NM, Univ Colorado, Dept Phys, Campus Box 390, Boulder, CO 80309 USA TI - On the duration of seismic motion incident onto the Valley of Mexico for subduction zone earthquakes AB - We have used finite difference simulations in 2-D models of the lithosphere to estimate the duration of long-period (>2 s) ground motion incident onto the Valley of Mexico for subduction zone earthquakes. Our simulations suggest that two heterogeneous structures extend the duration of the ground motion between the subduction zone and Mexico City by more than 1 min: (1) the Mexican Volcanic Belt and (2) two low-velocity layers in the coastal region; the accretionary prism and the water layer. The duration generated by a crustal model including these structures is similar to that for earthquake records observed in between the coast and Mexico City. In the Valley of Mexico, our models including only regional-scale heterogeneity reproduce approximately one half of the observed duration. The results suggest that both the regional- and the local-scale low-velocity structures must be taken into account in order to explain the observed extended signal duration in the Valley of Mexico MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000178611800015 L2 - duration of ground motion;finite difference;regional propagation;Valley of Mexico;1985 MICHOACAN EARTHQUAKE; STRONG GROUND MOTION; WAVE-PROPAGATION; LONG-DURATION; CITY; AMPLIFICATION; DEPTH; SITE; GUERRERO; CRUST SO - Geophysical Journal International 2002 ;151(2):501-510 6821 UI - 11778 AU - Sharma VK AU - Hicks SD AU - Rivera W AU - Vazquez FG AD - Florida Inst Technol, Dept Chem, Melbourne, FL 32901, USAUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoSharma, VK, Florida Inst Technol, Dept Chem, 150 W Univ Blvd, Melbourne, FL 32901 USA TI - Characterization and degradation of petroleum hydrocarbons following an oil spill into a coastal environment of south Texas, USA AB - Petroleum hydrocarbons were characterized at eleven sites within the sediments of a coastal stream in south Texas, U.S.A. following a medium sized crude oil spill. Bank and open-water (deep) sediments were collected at each site. Hydrocarbons targeted for analysis included 22 aliphatic hydrocarbons (C-11 to C-34) and 16 polynuclear aromatic hydrocarbons. Sediment concentrations were measured at intervals of 1, 2, 3, 4, 6, and 12 months post-spill. Higher hydrocarbon concentrations were observed for a longer duration within the deep sediments than bank sediments. Initial hydrocarbon constituents in impacted sediments matched the crude oil fingerprint accurately with the exception of the lighter-end hydrocarbons. The lighter-end aliphatic hydrocarbons are affected immediately by evaporation and dissolution processes during the spill event and were found below the detection levels at most of the sites. Total hydrocarbon concentrations in sediments within each hydrocarbon group returned to background levels by the end of the study period. Observed decreases in high molecular weight polycyclic aromatic hydrocarbons (PAH) concentrations exceeded known environmental degradation rates which suggests the influence of a sediment transport process. Overall, the fate of petroleum hydrocarbons within this type of environment were likely related to both degradation and sediment transport processes. By the end of the study period, most individual PAH constituent concentrations were below threshold concentrations thought to produce toxic effects in marine and estuarine organisms. PAH constituents concentrations remaining above threshold concentrations included benz(a)anthracene, chrysene, and benzo(a)pyrene MH - USA MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000173803800006 L2 - coastal environment;oil spill;petroleum hydrocarbons;sediments;POLYCYCLIC AROMATIC-HYDROCARBONS; CHEMICAL CONCENTRATIONS; SOURCE IDENTIFICATION; RECENT SEDIMENTS; NUECES-BAY; CRUDE-OIL; MARINE; FATE; CONTAMINATION; SEAWATER SO - Water Air and Soil Pollution 2002 ;134(1-4):111-127 6822 UI - 10113 AU - Shaw W AU - Hogg R AU - Koch V AU - Wells T AU - Frishberg Y AU - Jones D AU - Delucchi A AU - Hernandez O AU - Tenney F AU - Romero B AU - Murphy G AU - Lo M AU - Hand E AU - Panebianco D AU - Shahinfar S AD - Merck & Co Inc, West Point, PA 72202, USAMed City Dallas Hosp, IL-91031 Dallas, TX, USAUPS, Inst Crianca, Sao Paulo, BrazilArkansas Childrens Hosp, Little Rock, AR, USAShaare Zedek Med Ctr, Jerusalem, IsraelLebonheur Childrens Hosp & Med Ctr, Memphis, TN, USAHosp Ninos Luis Calvo Mackenna, Santiago, ChileInst Nacl Del Pino, Bogota, ColombiaLSU Med Ctr, Shreveport, LA, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, Mexico TI - Losartan (Los) and E-3174 (E) pharmacokinetics (PK) in hypertensive children and infants MH - Brazil MH - Chile MH - Colombia MH - Israel MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757500733 SO - Journal of the American Society of Nephrology 2002 ;13():149A-149A 6823 UI - 11226 AU - Shen YJ AU - Ochoa NA AU - Huntley JM AD - Loughborough Univ Technol, Dept Mech Engn, Loughborough LE11 3TU, Leics, EnglandCtr Invest Opt AC, Leon, Gto, MexicoShen, YJ, Loughborough Univ Technol, Dept Mech Engn, Loughborough LE11 3TU, Leics, England TI - Real-time speckle interferometry fringe formation with an adaptive phase mask AB - We describe what we believe is a novel speckle-pattern interferometry method of applying a spatial light modulator (SLM) as an adaptive phase mask to obtain real-time fringes of a deformed object without using conventional correlation methods of electronic subtraction or addition. The method is to use a SLM to cancel initial phase in the speckled image before the object is deformed. The fringes from the deformed object can be visualized directly after the initial phase has been canceled. A commercial liquid-crystal television is used as a SLM. The performance of using this SLM in an out-of-plane speckle interferometer is demonstrated. (C) 2002 Optical Society of America MH - United Kingdom MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000175347500012 L2 - LIQUID-CRYSTAL TELEVISION; SHIFTING INTERFEROMETRY SO - Applied Optics 2002 ;41(13):2454-2460 6824 UI - 11818 AU - Shepherd DS AU - Watson AM AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoShepherd, DS, Natl Radio Astron Observ, POB 0, Socorro, NM 87801, USA TI - A detailed study of G173.58+2.45: An intermediate-mass star-forming region AB - The G173.58 + 2.45 outflow was imaged in CO line emission, millimeter and centimeter continuum emission, and near-infrared emission. The observations provide evidence that the outflow is produced by at least two young stellar objects (spectral types late B to mid-A) located in a cluster of near-infrared sources near the center of the molecular outflow. The combined mass outflow rate of 1 x 10(-4) M. yr(-1) provides an upper limit on the luminosity of the young stellar objects powering the outflow of 50 L. (spectral type later than B7), which is consistent with the near-infrared data. There is no indication of a well-collimated jet, either on large or small scales, that could power the outflow. We conclude that G173.58 + 2.45 is an excellent example of clustered, intermediate-mass star formation at an age of roughly 10(5) yr. The near-infrared observations also suggest that the cluster contains at least two mid-to-early B stars, neither of which seem to be in an outflow stage. Our improved understanding of the G173.58 + 2.45 young star cluster contrasts sharply with previous conclusions, based on low-resolution images, that a single outflow with relatively simple morphology was powered by a jet from an early B star. This analysis illustrates that caution should be exercised before low-resolution images are used to infer conditions in massive star-forming regions and the accretion-outflow mechanism associated with massive stars MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173804900032 L2 - HII regions;ISM : jets and outflows;ISM : molecules;stars : formation;MOLECULAR OUTFLOWS; INFRARED CAMERA SO - Astrophysical Journal 2002 ;566(2):966-973 6825 UI - 10377 AU - Shlyagin MG AU - Swart PL AU - Miridonov SV AU - Chtcherbakov AA AU - Borbon IM AU - Spirin VV AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoRand Afrikaans Univ, Ctr Opt Commun, Dept Elect & Elect Engn, ZA-2006 Auckland Pk, South AfricaShlyagin, MG, CICESE, Div Fis Aplicada, Km 107 Carret Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - Static strain measurement with sub-micro-strain resolution and large dynamic range using a twin-Bragg-grating Fabry-Perot sensor AB - We present experimental results on testing a twin-grating fiber optic sensor for the measurement of static strain and temperature. The sensor is built with two identical Bragg gratings closely spaced in a single-mode fiber. It produces a reflection spectrum modulated by interference. As in traditional fiber Bragg grating sensors, strain of the fiber leads to the wavelength shift of the reflection spectrum. This shift can be determined precisely by measuring phase changes for corresponding components of Fourier transform of the reflection spectrum. Such an approach allows an absolute strain measurement with an interferometric sensitivity. Resolution of 0.2 mum/m and range to resolution similar to10(4) : 1 were demonstrated experimentally for static strain measurements using a pair of 0.7-mm-long Bragg gratings with reflectivity of 1% each. (C) 2002 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - South Africa PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000177626800010 L2 - fiber optic sensor;Bragg grating;Fabry-Perot interferometer;strain measurement;FIBER; DEMODULATION SO - Optical Engineering 2002 ;41(8):1809-1814 6826 UI - 10623 AU - Shortt K AU - Meghzifene A AU - Saravi M AU - Amorim R AU - Gutt F AU - Tovar V AU - Shobe J AD - Natl Res Council Canada, Ottawa, ON, CanadaIAEA, Vienna, AustriaComis Nacl Energia Atom, RA-1429 Buenos Aires, DF, ArgentinaComis Nacl Energia Nucl, Rio De Janeiro, BrazilInst Venezolano Invest Cient, Caracas, VenezuelaInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoNatl Inst Stand & Technol, Gaithersburg, MD 20899, USA TI - International dosimetry comparison MH - Argentina MH - Austria MH - Brazil MH - Canada MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - MELVILLE: AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Meeting Abstract AV - English IS - 0094-2405 UR - ISI:000176373400047 SO - Medical Physics 2002 ;29(6):1199-1199 6827 UI - 9765 AU - Shu FH AU - Lizano S AU - Galli D AU - Canto J AU - Laughlin G AD - Natl Tsing Hua Univ, Hsinchu 30013, TaiwanUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoOsserv Astrofis Arcetri, I-50125 Florence, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 4510, DF, MexicoUniv Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064, USAShu, FH, Natl Tsing Hua Univ, 101 Sect 2 Kuang Fu Rd, Hsinchu 30013, Taiwan TI - Self-similar champagne flows in HII regions AB - We consider the idealized expansion of an initially self-gravitating, static, singular, isothermal cloud core. For t greater than or equal to 0, the gas is ionized and heated to a higher uniform temperature by the formation of a luminous but massless star in its center. The approximation that the mass and gravity of the central star are negligible for the subsequent motion of the H II region holds for distances r much greater than similar to100 AU and for the massive cloud cores that give rise to high-mass stars. If the initial ionization and heating are approximated to occur instantaneously at t = 0, then the subsequent flow (for r >> 100 AU) caused by the resulting imbalance between self-gravity and thermal pressure is self-similar. Because of the steep density profile (rho proportional to r(-2)), pressure gradients produce a shock front that travels into the cloud, accelerating the gas to supersonic velocities in what has been called the "champagne phase.'' The expansion of the inner region at t > 0 is connected to the outer envelope of the now ionized cloud core through this shock, whose strength depends on the temperature of the H II gas. In particular, we find a modified Larson-Penston (L-P) type of solution as part of the linear sequence of self-similar champagne outflows. The modification involves the proper insertion of a shock and produces the right behavior at infinity (v --> 0) for an outflow of finite duration, reconciling the long-standing conflict on the correct (inflow or outflow) interpretation for the original L-P solution. For realistic heating due to a massive young central star that ionizes and heats the gas to similar to10(4) K, we show that even the self-gravity of the ionized gas of the massive molecular cloud core can be neglected. We then study the self-similar solutions of the expansion of H II regions embedded in molecular clouds characterized by more general power-law density distributions: rho proportional to r(-n) with 3/2 < n < 3. In these cases, the shock velocity is an increasing function of the exponent n and diverges as n --> 3. We show that this happens because the model includes an origin where the pressure driving the shock diverges because the enclosed heated mass is infinite. Our results imply that the continued photoevaporation of massive reservoirs of neutral gas (e.g., surrounding disks and/or globules) near the embedded ionizing source is required in order to maintain over a significant timescale the emission measure observed in champagne flows MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Taiwan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 29 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179458300032 L2 - HIII regions;hydrodynamics;ISM : clouds;stars : formation;H-II REGIONS; MASSIVE STARS; VELOCITY STRUCTURE; CORES; PHOTOEVAPORATION; CONDENSATION; COLLAPSE; SPHERES; CLOUDS; DISKS SO - Astrophysical Journal 2002 ;580(2):969-979 6828 UI - 9956 AU - Shumilin E AU - Grajeda-Munoz M AU - Silverberg N AU - Sapozhnikov D AD - IPN, Ctr Interdisciplinario Ciencias Marinas, La Paz 23096, Baja Calig Sur, MexicoRussian Acad Sci, VI Vernadskii Inst Geochem & Analyt Chem, Moscow, RussiaShumilin, E, IPN, Ctr Interdisciplinario Ciencias Marinas, Av IPN S-N Col Playa Palo Santa Rita,Apdo Postal, La Paz 23096, Baja Calig Sur, Mexico TI - Observations on trace element hypersaline geochemistry in surficial deposits of evaporation ponds of Exportadora de Sal, Guerrero Negro, Baja California Sur, Mexico AB - Trace element concentrations were determined for 28 samples of surficial deposits collected over a salinity gradient of 39parts per thousand to approximately 250parts per thousand in evaporation ponds of a large industrial NaCl production facility located near Guerrero Negro (Peninsula of Baja California, Mexico). Grain size and lithology are used to describe the mixed chemical-detrital material. Major earth and trace elements in the sediments were measured by a combination of an inductively coupled plasma mass spectrometry (ICPMS) for As, Ba, Cd, Cu, Mg, Ni, Pb, U, and Zn, flame atomic absorption spectrophotometry for Al, Fe, and Mn, isotope dilution ICPMS for Hg, and instrumental neutron activation analysis (INAA) for Cs, Ca, Sr, Cr, Sb, and Sc. Changes in grain-size, mineralogy, and chemical composition suggest that suspended particulate matter supplied to the system, mainly by seawater pumped in from the adjacent Ojo de Liebre Lagoon, and to a smaller extent, carried into the ponds by wind from adjacent dunes and by wave-induced erosion of retaining dikes, dominates the sediment in the first two concentration ponds. Freshly deposited fine sediments in these ponds are enriched in organic matter, biogenic carbonates, Al, Fe, Mn, and most of the trace elements, and are similar to surface sediments of the adjacent lagoon. In ponds 3 and 4, intensive evaporation-induced precipitation of calcium and magnesium carbonates occurs causing scavenging of Al, Fe, Mn carried by colloidal particles. The sediment in ponds 4 and 5 includes a thick microbial mat layer, which is enriched in organic carbon, and the accumulation of As and Cd is observed there. In ponds 7 through 11, the deposits generally are low in organic matter and trace elements (except for Sb) and are formed by intensive gypsum and anhydrite precipitation, with an admixture of terrigeneous material in ponds 8-10 supplied by a dyke erosion or carried in with wind from adjacent sand dunes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0304-4203 UR - ISI:000178807300004 L2 - geochemistry of hypersaline environments;trace elements;surficial deposits;Baja California Peninsula;Guerrero Negro Salt Works;MINOR ELEMENTS; DEAD-SEA; RED-SEA; COASTAL SEDIMENTS; ATLANTIS-II; SEAWATER; BRINE; COPRECIPITATION; ACCUMULATION; PENINSULA SO - Marine Chemistry 2002 ;79(3-4):133-153 6829 UI - 9955 AU - Shumilin EN AU - Carriquiry JD AU - Camacho-Ibar VF AU - Sapozhnikov D AU - Kalmykov S AU - Sanchez A AU - guiniga-Garcia S AU - Sapozhnikov YA AD - Ctr Interdisciplinario Ciencias Marinas, La Paz 23096, Baja Calif Sur, MexicoUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoRussian Acad Sci, VI Vernadskii Inst Geochem & Analyt Chem, Moscow, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Div Radiochem, Moscow, RussiaShumilin, EN, Ctr Interdisciplinario Ciencias Marinas, Av Inst Politecn Nacl,S-N Col Playa Palo Santa Ri, La Paz 23096, Baja Calif Sur, Mexico TI - Spatial and vertical distributions of elements in sediments of the Colorado River delta and Upper Gulf of California AB - The abundance of major components (Fe, Ca, K, and organic carbon) and trace elements was analyzed in surface sediments and core samples from the Colorado River delta (CRD) and the Upper Gulf of California (UGC) using instrumental neutron activation analysis. The spatial distribution patterns of the elements studied are consistent with the model of sedimentary dynamics proposed for this area [Mar. Geol. 158 (1999) 125]: intense tidal resuspension of sediments in the delta with subsequent transport of suspended particulate matter in a southerly direction, followed by sedimentation of fine-grained material in a depocenter near the southwestern margin of the UGC. Concentrations of most of the elements are higher in the surface sediments of this depocenter. The gradual mixing of terrigenous and marine biogenic materials, normally expected for the estuarine sediments, was not detected in the CRD-UGC system because of homogenization of the sediments by tides and wind. Vertical profiles of element contents in samples of the sediment core collected in the depocenter area revealed (i) almost no anthropogenic contamination of the area by environmentally important trace elements such as Cr, Co, Sb, and As; (ii) a twofold decrease of Fe, Sc, Cr, and Co in upper core sediments; and (iii) the enrichment of the sediments at 60-62 cm depth in the core, in calcium carbonate, Ca, Sr, and the Eu/Sm shale-normalized ratio along with a depletion in this layer of Fe, Sc, Cr, Co, light rare-earth elements (REEs), and some other elements of terrigenous origin, presumably caused by the dilution of fluvial terrigenous material by biogenic carbonates, which were probably introduced at this level in the sediments by the action of a strong episodic winter storm, followed by the advective transport of shell fragments from the coastal clam banks or as a result of strong planktonic bloom. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - Mexico|Baja California MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0304-4203 UR - ISI:000178807300003 L2 - major elements;trace elements;sediments;Colorado River delta;Upper Gulf of California;COASTAL SEDIMENTS; BAJA-CALIFORNIA; BOTTOM SEDIMENTS; OF-CALIFORNIA; ESTUARINE; MEXICO; SEA; POLLUTION; DISCHARGE; PENINSULA SO - Marine Chemistry 2002 ;79(3-4):113-131 6830 UI - 11229 AU - Sideris EB AU - Toumanides S AU - Macuil B AU - Gutierrez-Leonard H AU - Poursanov M AU - Sokolov A AU - Moulopoulos SD AD - Univ Athens, Athenian Inst Pediat Cardiol, GR-10679 Athens, GreeceUniv Athens, Dept Clin Therapeut, GR-10679 Athens, GreeceMil Hosp, Mexico City, DF, MexicoBakulev Inst, Moscow, RussiaCardiol Inst, Tomsk, RussiaSideris, EB, Pediat Cardiol, 1600 Coulter 200, Amarillo, TX 79106, USA TI - Transcatheter patch correction of secundum atrial septal defects AB - The efficacy and safety of the transcatheter patch (TP) correction of a secundum atrial septal defect (ASD) was studied acutely and on short-term follow-up in 20 patients, successfully implanted with the device. TPs are made of polyurethane foam and require temporary balloon catheter immobilization on the atrial septum for 48 hours. Eighteen patients were not suitable for disk-device repair. The patient median age and ASD diameter were 37 years and 26 mm, respectively. Eighteen patients had immediate effective ASD occlusion; 2 patients had significant residual shunts. Premature leaks of the supportive balloons were responsible for the residual shunts. One of the patients with residual shunt received a second patch 6 months later with full occlusion. All patients with implants were doing well up to 24 months after implantation. Existing symptoms improved although residual shunts remained; septal anatomy was normalized, with the patched area becoming progressively indistinguishable from the rest of the septum. in conclusion, TP occlusion of secundum ASD is feasible and effective even for defects unsuitable for disk-device repair. The method appears safe acutely and on short-term follow-up, with symptomatic improvement and normalization of septal anatomy. (C) 2002 by Excerpta Medica, Inc MH - Greece MH - Mexico|Distrito Federal MH - Russia MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 6 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000175406600014 L2 - CLOSURE; OCCLUSION; DEVICES SO - American Journal of Cardiology 2002 ;89(9):1082-1086 6831 UI - 10798 AU - Siebert L AU - Carrasco-Nunez G AD - Smithsonian Inst, Global Volcanism Program, Washington, DC 20560, USAUniv Nacl Autonoma Mexico, Unidad Invest Ciencias Tierra, Mexico City 04510, DF, MexicoSiebert, L, Smithsonian Inst, Global Volcanism Program, Washington, DC 20560 USA TI - Late-Pleistocene to precolumbian behind-the-arc mafic volcanism in the eastern Mexican Volcanic Belt; implications for future hazards AB - An area of widespread alkaline-to-subalkaline volcanism lies at the northern end of the Cofre de Perote-Citlaltepetl (Pico de Orizaba) volcanic chain in the eastern Mexican Volcanic Belt (MVB). Two principal areas were active. About a dozen latest-Pleistocene to precolumbian vents form the 11-km-wide, E-W-trending Cofre de Perote vent cluster (CPVC) at 2300-2800 in elevation on the flank of the largely Pleistocene Cofre de Perote shield volcano and produced an extensive lava field that covers > 100 km(2). More widely dispersed vents form the Naolinco volcanic field (NVF) in the Sierra de Chiconquiaco north of the city of Jalapa (Xalapa). Three generations of flows are delineated by cone and lava-flow morphology, degree of vegetation and cultivation, and radiocarbon dating. The flows lie in the behind-the-are portion of the northeastern part of the MVB and show major- and trace-element chemical patterns transitional between intraplate and subduction zone environments. Flows of the oldest group originated from La Joya cinder cone (radiocarbon ages similar to 42 000 yr BP) at the eastern end of the CPVC. This cone fed an olivine-basaltic flow field of similar to 20 km(2) that extends about 14 km southeast to underlie the heavily populated northern outskirts of Jalapa, the capital city of the state of Veracruz. The Central Cone Group (CCG), of intermediate age, consists of four morphologically youthful cinder cones and associated vents that were the source of a lava field > 27 km(2) of late-Pleistocene or Holocene age. The youngest group includes the westernmost flow, from Cerro Colorado, and a lava flow similar to 2980 BP from the Rincon de Chapultepec scoria cone of the NVF. The latest eruption, from the compound El Volcancillo scoria cone, occurred about 870 radiocarbon years ago and produced two chemically and rheologically diverse lava flows that are among the youngest precolumbian flows in Mexico and resemble paired aa-pahoehoe flows from Mauna Loa volcano. The El Volcancillo eruption initially produced the high effusion rate, short-duration Toxtlacuaya alkaline aa lava flow from the southeastern crater. This 12-km-long hawaiite (average 50.5% SiO2) flow Was followed by extrusion of the cale-alkaline Rio Naolinco lava flow from the northwestern crater. This large-volume (similar to 1.3 km(3)) tube-fed basaltic pahoehoe flow (average SiO2 49%) traveled 50 kin. Inferred effusion rates suggest emplacement over a decade-long period. Flows of all three age groups are transected by Highway 140 and the railway that form major transportation arteries between Jalapa and Puebla. This area has not previously been considered to be at volcanic risk, but volcanism here has continued into precolumbian time. Future eruptions of similar magnitude and location to those documented here could pose significant hazards to transportation corridors and to densely populated areas in and to the north of Jalapa. Slight variations in vent locations could produce future flows down one or more of more than a half dozen drainages with widely varying population densities. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000176608200010 L2 - Mexican Volcanic Belt;Cofre de Perote volcano;lava flows;volcanic risk;alkali basalts;calc-alkaline composition;PICO-DE-ORIZABA; PLUME-RELATED MAGMATISM; CALC-ALKALIC VOLCANISM; ISLAND BASALT TYPE; CITLALTEPETL VOLCANO; ACTIVE MARGIN; CINDER CONES; COSTA-RICA; FLOW-FIELD; ROCKS SO - Journal of Volcanology and Geothermal Research 2002 ;115(1-2):179-205 6832 UI - 10304 AU - Sievert LL AU - Freedman RR AU - Garcia JZ AU - Foster JW AU - Soriano MDR AU - Longcope C AU - Franz C AD - Univ Massachusetts, Dept Anthropol, Amherst, MA 01003, USAWayne State Univ, Sch Med, Detroit, MI, USAClin Climaterio & Osteoporosis, Puebla, MexicoUniv Amer, Dept Anthropol, Puebla, MexicoUniv Massachusetts, Sch Med, Dept Obstet & Gynecol, Worcester, MA 01605, USASievert, LL, Univ Massachusetts, Dept Anthropol, Machmer Hall, Amherst, MA 01003 USA TI - Measurement of hot flashes by sternal skin conductance and subjective hot flash report in Puebla, Mexico AB - Objective: To measure hot flashes by sternal skin conductance in an urban Mexican population and to determine variables associated with hot flash reporting and measurement. Design: From June 1999 to August 2000, 67 perimenopausal women aged 40 to 65 years participated in interviews, anthropometric measures, and a 2-h recording of sternal skin conductance. Changes in sweating were used to demonstrate the presence/absence of a hot flash. During the test, women were asked to report if they experienced a hot flash. Results: During the study period, 10 women reported and demonstrated every hot flash, 24 women never reported or demonstrated a hot flash, 7 demonstrated hot flashes but did not report any of them, 7 reported hot flashes but did not demonstrate any of them, and 19 showed a mixture of responses. Women who demonstrated hot flashes by sternal skin conductance were measured in a warmer room, had more years of education, consumed more eggs as a child, recalled a heavier weight at age 18, and had a lower body mass index at interview compared with women who did not demonstrate hot flashes by sternal skin conductance. Women who subjectively reported hot flashes were measured in a warmer room, were more likely to be postmenopausal, reported more frequent consumption of coffee, and spent fewer months breast-feeding their last child compared with women who did not report the experience of hot flashes during the testing period. Conclusion: Room temperature explained part of the variation between women who did and did not demonstrate hot flashes via sternal skin conductance, between women who did and did not report the experience of hot flashes, and between women who did and did not demonstrate concordance in objective and subjective measures. In addition to room temperature, coffee intake, months spent breast-feeding the last child, and recalled weight at age 18 were important variables predicting hot flash experience MH - USA MH - Mexico|Puebla PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 1072-3714 UR - ISI:000177857200010 L2 - hot flashes;sternal skin conductance;CORE BODY-TEMPERATURE; MENOPAUSAL SYMPTOMS; AGE; FLUSHES; PHYSIOLOGY; WOMEN; LIFE SO - Menopause-the Journal of the North American Menopause Society 2002 ;9(5):367-376 6833 UI - 10189 AU - Sil'chenko OK AU - Afanasiev VL AU - Chavushyan VH AU - Valdes JR AD - Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, RussiaIsaac Newton Inst Chile, Moscow Branch, Moscow, RussiaRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSil'chenko, OK, Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Univ Pr 13, Moscow 119992, Russia TI - Young stellar nuclei in lenticular galaxies: NGC 5574 and NGC 7457 AB - The stellar population properties in the centers of NGC 5574 and NGC 7457 ( two lenticular galaxies previously shown to have radially homogeneous blue optical-band colors) are studied by means of integral-field spectroscopy. The compact nuclei of the galaxies appear to be chemically distinct: in NGC 5574 the nucleus is distinguished by a higher than solar iron-to-magnesium ratio, and in NGC 7457 a drop of mean stellar metallicity by a factor of 2 exists between the nucleus and the bulge. Both galaxies demonstrate a rather young mean luminosity-weighted age of the stellar populations in the bulges, not older than 5-7 Gyr; however, the chemically distinct nuclei are still younger, 2-2.5 Gyr old. The kinematics of the stars in the center of NGC 5574 are probably affected by the influence of its global bar. The compact core of NGC 7457, with a radius of about 1."5, shows a visible counterrotation; a combined analysis of the photometric and kinematical two-dimensional maps allows us to conclude that the core rotates axisymmetrically, but its rotation plane is inclined to the main symmetry plane of the galaxy. The stellar velocity dispersion in the centers of both galaxies is anomalously low: 60-80 km s(-1) MH - Mexico|Puebla MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000178300000010 L2 - galaxies : evolution galaxies : individual ( NGC 5574;NGC 7457);galaxies : kinematics and dynamics galaxies : nuclei galaxies : structure;INTEGRAL-FIELD SPECTROGRAPH; S0 GALAXIES; VELOCITY DISPERSIONS; ELLIPTICAL GALAXIES; GALACTIC BULGES; SPIRAL GALAXIES; DISTINCT NUCLEI; DISK GALAXIES; H-I; SAMPLE SO - Astrophysical Journal 2002 ;577(2):668-679 6834 UI - 9696 AU - Silant'ev NA AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Pulkovo Astron Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico TI - Calculation of the diffusion coefficient in acoustic turbulence AB - The first (Born) approximation commonly used to calculate the diffusion coefficient D-T of a passive scalar in acoustic turbulence is shown to be insufficient. Even for a small main parameter-the Mach number, M < 1-the next approximation gives a larger contribution to D-T than does the first approximation, but negative in sign. We present a procedure for correctly calculating D-T based on the solution of a nonlinear DIA (direct interaction approximation) equation for the mean Green's function of the problem. We include an additional term in the general formula for D-T that directly describes the compressibility of acoustic turbulence. This term has not been known previously and has been disregarded even in the Born approximation. A positive value was obtained for D-T = CM(3)u(0)/p(0). The spectrum E(x) was assumed to be smooth at distances Deltax similar to M-2 < 1. (C) 2002 MAIK "Nauka / Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1063-7761 UR - ISI:000179629500019 SO - Journal of Experimental and Theoretical Physics 2002 ;95(5):957-964 6835 UI - 11297 AU - Silant'ev NA AU - Lekht EE AU - Mendosa-Torres JE AU - Tolmachev AM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoRussian Acad Sci, Pulkovo Astron Obser, St Petersburg 196140, RussiaSternberg Astron Inst, Moscow 119899, RussiaRussian Acad Sci, PN Lebedev Phys Inst, Astrospace Ctr, Pushchino Radio Astron Observ, Pushchino 142292, Moscow Oblast, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - A possible formation mechanism of the asymmetry in the H2O maser emission line AB - We present a possible formation mechanism of the asymmetry in the maser emission line of H2O sources associated with star-forming regions. Observations with the RT-22 radio telescope at the Pushchino Radio Astronomy Observatory are used. We analyze the line profiles of emission features in the sources G43.8-0.1, NGC 2071, and ON1. If the line is asymmetric, the left (low-velocity) wing is higher than the right wing. The proposed mechanism accounts for the observed asymmetry and makes it possible to estimate some physical parameters of the medium in the vicinity of a maser spot. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000175225400002 L2 - star-forming regions;interstellar molecules;maser radio sources;G43.8-0.1 SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2002 ;28(4):217-222 6836 UI - 11681 AU - Silant'ev NA AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Main Astron Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Polarization from magnetized optically thick accretion disks AB - We present simple approximate formulae for intensity and the other Stokes parameters of outgoing radiation for magnetized, plane-parallel optically thick atmospheres. We assume that the polarization arises as a result of the light scattering on free electrons in magnetized plasma of an atmosphere. Our asymptotic formulae take place when the Faraday rotation angle psi at the optical length tau approximate to 1 is large,psi greater than or equal to 1, and magnetic field less than or equal to 10(5) G, when the scattering cross-section has the Thomson value. The formulae describe the radiation for an arbitrary direction of the magnetic field. The Milne problem, the atmospheres with homogeneous and linearly distributed thermal sources, as well as exponential sources are considered. The superposition of these "standard" sources can represent practically any real distribution of sources in optically thick accretion disks. Polarization for some particular models of magnetic fields on the surface of at accretion disks are considered (chaotic fields in turbulent plasma, axially symmetric plane magnetic fields and the field of the magnetic dipole). The presented results allow us to calculate or estimate the polarization for a large variety of optically thick magnetized accretion disks MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000174183500039 L2 - accretion disks;polarization;magnetic fields;stars;quasars;galaxies : nuclei;YOUNG STELLAR OBJECTS; FARADAY-ROTATION; QUASARS; RADIATION; DISCS; LINE; QSOS SO - Astronomy & Astrophysics 2002 ;383(1):326-337 6837 UI - 9756 AU - Silich S AU - Oey S AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoLowell Observ, Flagstaff, AZ 86001, USASilich, S, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla 72000, Mexico TI - Superbubble metallicities and X-ray luminosities AB - We show that X-ray emission and dynamical properties of superbubbles around OB associations are affected by metal ejection from the enclosed Type 11 supernovae (SNe). The SN and massive star yields may significantly change the superbubble interior metallicity and enhance its X-ray luminosity MH - Mexico|Puebla MH - USA PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - S;Article AV - English IS - 0074-1809 UR - ISI:000179397100090 L2 - LARGE MAGELLANIC CLOUD SO - Extragalactic Star Clusters 2002 ;207():459-460 6838 UI - 11299 AU - Silich S AU - Tenorio-Tagle G AU - Munoz-Tunon C AU - Cairos LM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev 127, UkraineInst Astrofis Canarias, E-38200 San Cristobal la Laguna, SpainUniv Sternwarte, D-37083 Gottingen, GermanySilich, S, Inst Nacl Astrofis Opt & Elect, Apdo 51, Puebla 72000, Mexico TI - On the recent history of star formation in the blue compact dwarf galaxy VII Zw 403 AB - Here we attempt to infer the recent history of star formation in the BCD galaxy VII Zw 403, based on an analysis that accounts for the dynamics of the remnant generated either by an instantaneous burst or by a continuous star formation event. The models are restricted by the size of the diffuse X-ray emitting region, the H luminosity from the star-forming region, and the superbubble diffuse X-ray luminosity. We have reobserved VII Zw 403 with a better sensitivity corresponding to the threshold Halpha flux 8.15 x 10(-17) ergs cm(-2) s(-1). The total Halpha luminosity derived from our data is much larger than reported before and presents a variety of ionized laments and incomplete shells superimposed on the diffuse Halpha emission. This result has a profound impact on the predicted properties of the starburst-blown superbubble. Numerical calculations based on the Hubble Space Telescope Halpha data predict two different scenarios of star formation able to match simultaneously all observed parameters. These are an instantaneous burst of star formation with a total mass of 5 x 10(5) M-. and a star-forming event with a constant star formation rate SFR = 4 x 10(-3) M-. yr(-1), which lasts for 35 Myr. The numerical calculations based on the energy input rate derived from our observations predict a short episode of star formation lasting less than 10 Myr with a total star cluster mass of similar to(1-3 x 10(6) M-.. However, the five main star-forming knots are sufficiently distant to form a coherent shell in a short timescale and still keep their energies blocked within local, spatially separated bubbles. The X-ray luminosities of these are here shown to be consistent with the ROSAT PSPC diffuse X-ray emission MH - Germany MH - Mexico|Puebla MH - Spain MH - Ukraine PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000175311200019 L2 - galaxies : dwarf;galaxies : individual (VII Zw 403);galaxies : starburst;ISM : abundances;ISM : bubbles;LARGE-MAGELLANIC-CLOUD; X-RAY-EMISSION; INTERSTELLAR-MEDIUM; STARBURST GALAXIES; PROCESSED MATTER; OB ASSOCIATIONS; GALACTIC WINDS; MASS-LOSS; EVOLUTION; GAS SO - Astronomical Journal 2002 ;123(5):2438-2448 6839 UI - 11071 AU - Siller F AU - Salgado S AU - Garcia J AU - Vera JM AU - Miranda A AU - Grijalva G AU - Galvez J AU - guilar-Cordova E AU - rmendariz-Borunda J AD - Univ Guadalajara, CUCS, Inst Biol Mol & Terapia Gen, Guadalajara 44430, Jalisco, MexicoHarvard Univ, Gene Therapy Initiat, Boston, MA 02115, USA TI - Treatment with human metalloproteinase-8 gene delivery ameliorates experimental rat liver cirrhosis resembling alcoholic human disease MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0168-8278 UR - ISI:000175704700085 SO - Journal of Hepatology 2002 ;36():28-28 6840 UI - 10696 AU - Silva-Oliver G AU - Galicia-Luna LA AU - Sandler SI AD - Inst Politecn Nacl, ESIQIE, Lab Termodinam Grad, IER Piso, Mexico City 07738, DF, MexicoUniv Delaware, Ctr Mol & Engn Thermodynam, Dept Chem Engn, Newark, DE 19716, USAGalicia-Luna, LA, Inst Politecn Nacl, ESIQIE, Lab Termodinam Grad, IER Piso, Secc 6, Mexico City 07738, DF, Mexico TI - Vapor-liquid equilibria and critical points for the carbon dioxide+1-pentanol and carbon dioxide+2-pentanol systems at temperatures from 332 to 432 K AB - Vapor-liquid equilibria and critical points of the systems: carbon dioxide + I-pentanol at (333.08, 343.69, 374.93, 414.23 and 426.86 K) up to 18.6 MPa and carbon dioxide + 2-pentanol at (332.10, 343.61, 374.15, 397.56, 422.28 and 431.78 K) up to 15.7 MPa are reported at compositions near the critical point. An apparatus capable of measurement up to 60 MPa and 523 K based on the static-analytic method has been used to perform fast determinations of the vapor-liquid equilibria and critical pressures. The Soave, Peng-Robinson and Patel-Teja equations of state with Wong-Sandler type mixing rules and temperature independent parameters cannot predict the VLE of the carbon dioxide + I-pentanol and carbon dioxide + 2-pentanol systems well (deviations >10% for pressure). Instead the EoS mixture parameters were fitted to the VLE data at each temperature, separately. In this way the calculated VLE are found to be in good agreement with the experimental data. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000176886500013 L2 - VLE apparatus;EoS;mixing rules;VLE;FLUID-PHASE-EQUILIBRIA; MIXTURES; DIOXIDE; STATE; APPARATUS; BEHAVIOR; EQUATION SO - Fluid Phase Equilibria 2002 ;200(1):161-172 6841 UI - 8688 AU - Silva-Zolezzi I AU - Hebron KJ AU - Thomas G AU - Millington DS AU - Valle V AU - Jimenez-Sanchez G AD - Johns Hopkins Univ, HHMI, Baltimore, MD, USAJohns Hopkins Univ, Inst Med Genet, Baltimore, MD, USACINVESTAV, Programa Doctoral Biomed Mol, Mexico City 14000, DF, MexicoKennedy Krieger Inst, Baltimore, MD, USADuke Univ, Ctr Med, Durham, NC, USA TI - Impaired fuel homeostasis leads to defective non-shivering thermogenesis in the 70kDa Peroxisomal Membrane Protein (PMP70) deficient mouse MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000178025802176 SO - American Journal of Human Genetics 2002 ;71(4):541-541 6842 UI - 11252 AU - Silva-Zolezzi I AU - Hebron KJ AU - Mihalik SJ AU - Valle D AU - Jimenez-Sanchez G AD - Johns Hopkins Univ, McKusick Nathans Inst Genet Med, Baltimore, MD, USACINVESTAV, Programa Doctoral Biomed Mol, Mexico City 14000, DF, MexicoKennedy Krieger Inst, Baltimore, MD, USA TI - Defective non-shivering thermogenesis by innapropriate activation of PPAR alpha in the 70kDa peroxisomal membrane protein (PMP70) deficient mice MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714601306 SO - Pediatric Research 2002 ;51(4):225A-225A 6843 UI - 11399 AU - Silva AM AU - Queiroz DBC AU - Neto EFC AU - Naffah-Mazzacoratti MD AU - Godinho RO AU - Porto CS AU - Gutierrez-Ospina G AU - Avellar MCW AD - UNIFESP, Dept Pharmacol, Sect Expt Endocrinol, Escola Paulista Med, BR-04044020 Sao Paulo, BrazilUNIFESP, Dept Neurol & Neurosurg, Escola Paulista Med, BR-04044020 Sao Paulo, BrazilNatl Autonomous Univ Mexico, Inst Biomed Res, Dept Cell Biol, Mexico City 04510, DF, MexicoAvellar, MCW, UNIFESP, Dept Pharmacol, Sect Expt Endocrinol, Escola Paulista Med, Rua 03 Maio 100, BR-04044020 Sao Paulo, Brazil TI - Segment-specific decrease of both catecholamine concentration and acetylcholinesterase activity are accompanied by nerve refinement in the rat cauda epididymis during sexual maturation AB - In the present work, histochemical and biochemical studies were conducted to analyze changes in the pattern of autonomic innervation during sexual maturation, using the rat epididymis as a model. Glyoxylic acid histochemistry and immunohistochemical studies against dopamine beta-hydroxylase (DPH) and acetylcholinesterase (AChE) indicated a reduction in the amount of catecholaminergic and AChE-positive neurons, fibers, and puncta detected in the cauda epididymis of adult rats (120 days old), when compared to immature (40 days) and young adult (60 days) animals. No obvious age-related variations were detected in the few catecholaminergic and AChE-positive fibers and puncta present in the caput region. AChE-positive fibers were found sorting out among epithelial cells and ending free upon the epithelial surface or into the tubular lumen of the cauda region of adult rats. Furthermore, a positive staining for AChE in epithelial cells was also detected in the caput and cauda epididymis in all ages studied. Biochemical analysis confirmed a significant decrease in noradrenaline concentration as well as AChE activity in the cauda epididymis with sexual maturation. Immunohistochemical studies against microtubule-associated protein 1B (MAP 113), a neuronal cytoskeletal marker, further substantiated the quantitative changes observed in catecholaminergic and AChE-positive neuronal elements in the cauda epididymis. Thus, our results documented segment-specific variations in noradrenaline concentration and AChE activity during epididymal sexual maturation and suggest that such variations result, at least in part, from the refinement of the autonomic innervation pattern with age MH - Brazil MH - Mexico|Distrito Federal PB - LAWRENCE: AMER SOC ANDROLOGY, INC RP - NOT IN FILE U3 - TC 2 U4 - Andrology U5 - J;Article AV - English IS - 0196-3635 UR - ISI:000174957400014 L2 - autonomic innervation;male reproductive tract;development;neurons;age;COMPENSATORY OVARIAN HYPERTROPHY; PARTIAL SYMPATHETIC DENERVATION; MICROTUBULE-ASSOCIATED PROTEINS; POSTNATAL-DEVELOPMENT; TESTICULAR DENERVATION; ADRENERGIC-RECEPTORS; GENE-EXPRESSION; CEREBRAL-CORTEX; IMMATURE RATS; ADULT RATS SO - Journal of Andrology 2002 ;23(3):374-383 6844 UI - 10528 AU - Simmons MP AU - Ochoterena H AU - Freudenstein JV AD - Ohio State Univ Herbarium, Columbus, OH 43212, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoSimmons, MP, Colorado State Univ, Dept Biol, E106 Anat Zool Bldg, Ft Collins, CO 80523 USA TI - Amino acid vs. nucleotide characters: challenging preconceived notions AB - The Soltis et al. (2000) 567-terminal analysis of atpB, rbcL, and 185 rDNA was used as an empirical example to test the use of amino acid vs. nucleotide characters for protein-coding genes at deeper taxonomic levels. Nucleotides for atpB and rbcL had 6.5 times the amount of possible synapomorphy as amino acids. Based on parsimony analyses with unordered character states, nucleotides outperformed amino acids for all three measures of phylogenetic signal used (resolution, branch support, and congruence with independent evidence). The nucleotide tree was much more resolved than the amino acid tree, for both large and small clades. Nearly twice the percentage of well-supported clades resolved in the 185 rDNA tree were resolved using nucleotides (91.8%) relative to amino acids (49.2%). The well-supported clades resolved by both character types were much better supported by nucleotides (98.7% vs. 83.8% average jackknife support). The faster evolving nucleotides with a smaller average character-state space Outperformed the slower evolving amino acids with a larger average character-state space. Nucleotides outperformed amino acids even with 90% of the terminals deleted. The lack of resolution on the amino acid trees appears to be caused by a lack of congruence among the amino acids, not a lack of replacement substitutions. (C) 2002 Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 23 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000177233900008 L2 - CYTOCHROME-B GENE; MOLECULAR PHYLOGENETIC ANALYSIS; HORNWORT CHLOROPLASTS; MITOCHONDRIAL-DNA; LARGE SUBUNIT; SEQUENCE DATA; GREEN PLANTS; SEED PLANTS; LAND PLANTS; RBCL SO - Molecular Phylogenetics and Evolution 2002 ;24(1):78-90 6845 UI - 11289 AU - Simmons MP AU - Ochoterena H AU - Freudenstein JV AD - Ohio State Univ Herbarium, Columbus, OH 43212, USANatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoSimmons, MP, Colorado State Univ, Dept Biol, Ft Collins, CO 80523, USA TI - Conflict between amino acid and nucleotide characters AB - Slowly evolving characters, such as amino acids and replacement substitutions, have generally been favored over faster evolving characters for inferring phylogenetic relationships. However, amino acids constitute composite characters and, because of the degenerate genetic code, are subject to convergence. Based on an analysis of atpB and rbcL in 567 seed plants, we show that silent substitutions may be more phylogenetically informative than replacement substitutions and that artifacts caused by composite characters and/or convergence cause clades on amino acid trees to conflict with nucleotide trees and independent evidence. These findings indicate that coding nucleotide sequences only as amino acid characters for phylogenetic analysis provides little benefit and may yield misleading results. (C) 2002 The Will Hennig Society MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Evolutionary Biology U5 - J;Article AV - English IS - 0748-3007 UR - ISI:000175266000004 L2 - CYTOCHROME-B GENE; PHYLOGENETIC-RELATIONSHIPS; CLADISTIC-ANALYSIS; MITOCHONDRIAL-DNA; DATA SETS; SEQUENCES; SYSTEMATICS; RBCL; INFORMATION; ANGIOSPERMS SO - Cladistics-the International Journal of the Willi Hennig Society 2002 ;18(2):200-206 6846 UI - 11293 AU - Singh SK AU - Mohanty WK AU - Bansal BK AU - Roonwal GS AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoIndian Inst Technol, Dept Civil Engn, New Delhi 110016, IndiaGovt India, Dept Sci & Technol, New Delhi 110016, IndiaUniv Delhi, Ctr Geosources, New Delhi 110021, IndiaSingh, SK, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Ground motion in Delhi from future large/great earthquakes in the central seismic gap of the Himalayan arc AB - We estimate ground motions in Delhi from possible future large/great earthquakes in the central seismic gap in the Himalayan arc. The closest distance from the rupture areas of such postulated earthquakes to Delhi may be about 200 km. We have used two methods to synthesize the expected ground motions. In the first, recordings in Delhi (three on soft sites and one on a hard site) of the 1999 Chamoli earthquake (M-w 6.5; epicentral distance, similar to300 km), which was located in the gap, are used as empirical Green's functions (EGFs). The ground motion during the target event is synthesized by random summation of the EGFs. In the second, the stochastic method, the motions have been estimated from the expected Fourier spectrum of the ground motion in Delhi through the application of Parseval's theorem and results from random vibration theory. We apply two versions of the stochastic method: the first assumes a point source while the second considers the source to be finite. The predictions from the two methods are in reasonable agreement for Mw(w) less than or equal to 7.5. For M-w > 7.5 events, the finiteness of the source becomes important. Several rupture scenarios are considered in the application of the finite-source stochastic method. The largest ground motions are predicted in Delhi for rupture occurring between the main boundary thrust and main central thrust and the hypocenter located at the northeast edge of the fault. For this rupture scenario and a postulated M-w 8.0 earthquake, the maximum expected horizontal acceleration (A(max)), and velocity (V-max) at soft sites in Delhi range between 96 and 140 gal and 8 to 19 cm/sec, respectively. For M-w 8.5 event, the corresponding values range between 174 and 218 gal and 17 to 36 cm/sec. A(max) at the hard sites are 3 to 4 times less than at the soft sites. The differences are somewhat smaller for V-max, which are roughly 2 to 3 times at soft sites as compared to the hard site. The horizontal A(max) and V-max estimated by Khattri (1999) for Mw 8.5, using a composite source model, are remarkably similar to those estimated here. The seismic hazard in Delhi may be especially high to the east of Yamuna river because the area is underlain by recent fluvial deposits. More extensive earthquake recordings, microzonation studies, research on liquefaction potential of the fluvial deposits, and further work on the estimation of expected ground motions in Delhi area are urgently needed MH - India MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000175320500003 L2 - LARGE SHALLOW EARTHQUAKES; CENTRAL-ASIA; MAGNITUDE; FAULT; MODEL; INDIA; DEFORMATION; SPECTRA; PLATE SO - Bulletin of the Seismological Society of America 2002 ;92(2):555-569 6847 UI - 9808 AU - Sira-Ramirez H AD - Univ Los Andes, Dept Sistemas Control, Merida, VenezuelaSira-Ramirez, H, IPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, Mexico TI - Dynamic second-order sliding mode control of the hovercraft vessel AB - In this paper, a suitable combination of the differential flatness property and the second-order sliding mode controller design technique is proposed for the specification of a robust dynamic feedback multivariable controller accomplishing prescribed trajectory tracking tasks for the earth coordinate position variables of a hovercraft vessel model MH - Mexico|Distrito Federal MH - Venezuela PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 13 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000179341900009 L2 - flat systems;hovercraft;second-order sliding;trajectory planning;NONLINEAR-SYSTEMS; FLATNESS SO - Ieee Transactions on Control Systems Technology 2002 ;10(6):860-865 6848 UI - 9870 AU - Sira-Ramirez H AU - Marquez-Contreras R AU - Fliess M AD - CINVESTAV IPN, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, MexicoCNRS, Signaux & Syst Lab, Gif Sur Yvette, FranceCNRS, UMR 8536, Ctr Math & Leurs Applicat, Cachan, FranceSira-Ramirez, H, CINVESTAV IPN, Dept Ingn Elect, Secc Mecatron, Av IPN 2508,AP 14740, Mexico City 07300, DF, Mexico TI - Sliding mode control of DC-to-DC power converters using integral reconstructors AB - A sliding mode feedback controller, based on integral reconstructors is developed for the regulation of the 'boost' DC-to-DC power converter circuit conduction in continuous conduction mode. The feedback control scheme uses only output capacitor voltage measurements, as well as knowledge of the available input signal, represented by the switch positions. The robustness of the feedback scheme is tested with abusively large, unmodelled, sudden load resistance variations. Copyright (C) 2002 John Wiley Sons, Ltd MH - France MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000179103700003 L2 - integral reconstructors;sliding modes;DC-to-DC power converters SO - International Journal of Robust and Nonlinear Control 2002 ;12(13):1173-1186 6849 UI - 9179 AU - Slysh VI AU - Voronkov MA AU - Val'tts IE AU - Migenes V AU - Shibata KM AU - Umemoto T AU - Inoue M AD - Ctr Astro Space, Moscow 117810, Russia. Univ Guanajuato, Dept Astron, Guanajuato 36000, Mexico. Natl Astron Observ, Mitaka, Tokyo 181, Japan TI - Space-VLBI observations of OH masers AB - We report on the first space-VLBI observations of the OH masers in two main-line OH transitions at 1665 and 1667 MHz. The observations involved the space radio telescope on board the Japanese satellite HALCA and an array of ground radio telescopes. The maps of the maser region and images of individual maser spots were produced with an angular resolution of 1 mas, which is several times higher than the angular resolution available on the ground. The maser spots were only partly resolved and a lower limit to the brightness temperature 6 X 10(12) K was obtained. The masers seem to be located in the direction of low interstellar scattering MH - Japan MH - Mexico|Guanajuato MH - Russia T3 - COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLESIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBW16P AV - English IS - 0074-1809 UR - ISI:000181054300022 SO - 2002 ;(206):105-111 6850 UI - 9514 AU - Slysh VI AU - Voronkov MA AU - Val'tts IE AU - Migenes V AD - PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117997, RussiaUniv Guanajuato, Dept Astron, Guanajuato, MexicoSlysh, VI, PN Lebedev Phys Inst, Ctr Astro Space, Profsoyuznaya Ul 84-32, Moscow 117997, Russia TI - Methanol and H2O masers in a disk around GL 2789 AB - VLBA and EVN radio observations of H2O masers at 22 GHz and methanol masers at 6.67 GHz have been used to obtain images of the maser spots in the infrared object GL 2789, which is associated with the young stellar object V645 Cyg. The position of these masers coincides with that of the optical object to within 0".2. The maser spots are located in a line oriented north-south, and their positions and radial velocities can be described by a model with a Keplerian disk with maximum radius 40 A U for the H2O masers and 800 AU for the methanol masers. The H2O and methanol masers spots are unresolved, and the lower limits for their brightness temperatures are 2 x 10(13) K and 1.4 x 10(9) K, respectively. A model in which the maser radiation is formed in extended water-methanol clouds associated with ice planets forming around the young star is proposed. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Guanajuato MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000180074400002 L2 - VLBI OBSERVATIONS; RADIO-CONTINUUM; 6.7 GHZ; V645-CYGNI; CYGNI; OUTFLOWS; EMISSION; STARS SO - Astronomy Reports 2002 ;46(12):969-980 6851 UI - 11143 AU - Slysh VI AU - Val'tts IE AU - Migenes V AD - Russian Acad Sci, Lebedev Phys Inst, Astro Space Ctr, Moscow 117810, RussiaUniv Guanajuato, Dept Astron, Guanajuato 360005, MexicoSlysh, VI, Russian Acad Sci, Lebedev Phys Inst, Astro Space Ctr, Profsoyaznaya 84-32, Moscow 117810, Russia TI - A magnetized disk around an O star: Polarization of the OH maser emission AB - W75N is one of the first OH masers in which 100% linear polarization has been observed in several spots. Two spots contain Zeeman pairs, corresponding to magnetic fields of 5.2 and 7.7 mG. Another Zeeman pair consisting of two linearly polarized components was tentatively detected in one spot. The linearly polarized spots are sigma components for the case when the magnetic field is perpendicular to the line of sight. For these spots, the magnetic field is perpendicular to the plane of the circurmstellar disk, though a correction for Galactic Faraday rotation may considerably modify this conclusion. (C) 2002 MAIK "Nauka/Interperiodica" MH - Mexico|Guanajuato MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000175644300005 L2 - OUTFLOW SO - Astronomy Reports 2002 ;46(3):216-223 6852 UI - 12053 AU - Slysh VI AU - Migenes V AU - Val'tts IE AU - Lyubchenko SY AU - Horiuchi S AU - Altunin VI AU - Fomalont EB AU - Inoue M AD - PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117810, RussiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoNatl Astron Observ, Tokyo 1818588, JapanCALTECH, Jet Prop Lab, Pasadena, CA 91109, USANatl Radio Astron Observ, Charlottesville, VA 22903, USANobeyama Radio Observ, Minamisa Ku, Nagano 38413, JapanSlysh, VI, PN Lebedev Phys Inst, Ctr Astro Space, Profsoyuznaya 84-32, Moscow 117810, Russia TI - Total linear polarization in the OH maser W75N: VLBA polarization structure AB - W75 N is a star-forming region containing various ultracompact H II regions and OH, H2O, and CH3OH maser emission. Our VLBA map shows that the OH masers are located in a thin disk rotating around an O star, the exciting star of the ultracompact H II region VLA 1. A separate set of maser spots is associated with the ultracompact H II region VLA 2. The radial velocity of OH maser spots varies across the disk from 3.7 to 10.9 km s-1. The diameter of the disk is 4000 AU. All maser spots are strongly polarized. These are the first OH masers showing nearly 100% linear polarization in several spots. Two maser spots seem to be Zeeman pairs, corresponding to a magnetic field of 5.2 and 7.7 mG, and in one case we tentatively find a Zeeman pair consisting of two linearly polarized components. The linearly polarized maser spots are shown to be sigma components, which is the case when the magnetic field is perpendicular to the line of sight. The direction of the magnetic field as determined from linearly polarized spots is perpendicular to the plane of the disk, although the Galactic Faraday rotation may significantly affect this conclusion MH - Japan MH - Mexico|Guanajuato MH - Russia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173154300031 L2 - ISM : individual (W75 N) ISM : molecules;masers;radio lines : ISM;surveys;RADIATION; OUTFLOW; SCALE SO - Astrophysical Journal 2002 ;564(1):317-326 6853 UI - 8994 AU - Smale M AU - Reynolds MP AU - Warburton M AU - Skovmand B AU - Trethowan R AU - Singh RP AU - Ortiz-Monasterio I AU - Crossa J AD - IFPRI, IPGRI, Washington, DC 20006, USACIMMYT, Int Maize & Wheat Improvement Ctr, Texcoco, MexicoSmale, M, IFPRI, IPGRI, 2033 K St NW, Washington, DC 20006, USA TI - Dimensions of diversity in modern spring bread wheat in developing countries from 1965 AB - Diverse and varied crop genetic resources are necessary (though not sufficient) for adequate food production in a rapidly changing world. Since the scientific community first raised public concern several decades ago, modern cultivars have been viewed as the cause of declining diversity in the world's crop genetic resources. This paper tests the hypothesis of increasing genetic uniformity in modern spring bread wheat (Triticum aestivum L.) cultivars from 1965, a year which marks the release of some of the first modern semidwarf cuitivars carrying Rht1 and Rht2 genes in the developing world. Results from previously published studies are summarized. Preliminary molecular analyses, and new analyses of cultivar numbers, areas, ages, and genealogies are presented. An estimated 77% of the spring bread wheat area in the developing world today is sown to CIMMYT-related wheats, but this does not imply that they are genetically uniform. The hypothesis of increasing genetic uniformity is tested by assessing changes in the diversity of leading progenitors over three decades, in terms of several dimensions of diversity. Latent dimensions include genetic distance and genealogies. Apparent dimensions include performance with respect to yield potential, maintenance and stability across management (input use), and growing environments. The data are not consistent with the view that the genetic diversity of modern semidwarf wheat grown in the developing world has decreased over time. Moreover, since national programs in developing countries cross CIMMYT lines with their own materials before releasing them, the genetic diversity in their cultivars is at least as great as that present among CIMMYT lines MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430200001 L2 - GENETIC DIVERSITY; LEAF RUST; CHROMOSOMAL LOCATION; NORTHWEST MEXICO; YIELD; CULTIVARS; RESISTANCE; PROGRESS; IMPROVEMENT; PARENTAGE SO - Crop Science 2002 ;42(6):1766-1779 6854 UI - 11722 AU - Smeyers YG AU - Villa M AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoSmeyers, YG, CSIC, Inst Estructura Mat, Serrano 123, E-28006 Madrid, Spain TI - A theoretical determination of the methyl and aldehydic torsion far-infrared spectrum of propanal-d(0) with the vibrational zero point correction AB - The methyl and aldehydic torsions far-infrared (FIR) spectrum of standard propanal is determined theoretically taking into account the vibrational zero point energy (ZPE) of the remaining small amplitude vibration modes in an anharmonic approach. For this purpose, the potential energy function obtained in a previous calculation at the 6-311(3df,p) restricted Hartree-Fock/second-order Moller-Plesset level [J. Chem. Phys. 109, 2279 (1998)] is modified for the anharmonic ZPE corrections. With this corrected potential for the ZPE, the kinetic parameters, as well as the electric dipole moment variations, the FIR frequencies, and intensities for the methyl and aldehyde torsions of propanal were determined theoretically using a two-dimensional approach. The calculated torsional band structures of propanal determined without and with the ZPE corrections were compared between themselves and with the available experimental data. It is found that the theoretical calculations permit one to reproduce and assign 24 of the 25 observed bands. In the same way, the introduction of the ZPE corrections is seen to yield more satisfactory frequency values for the aldehyde torsion, double quanta, and methyl-aldehyde combination bands. (C) 2002 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000174087000014 L2 - NONRIGID MOLECULES; ENERGY SO - Journal of Chemical Physics 2002 ;116(10):4087-4093 6855 UI - 11083 AU - Smith AD AU - Thorkelson D AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoSimon Fraser Univ, Dept Earth Sci, Burnaby, BC V5A 1S6, CanadaSmith, AD, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemical and Nd-Sr-Pb isotopic evidence on the origin and geodynamic evolution of mid-Cretaceous continental arc volcanic rocks of the Spences Bridge Group, south-central British Columbia AB - The mid-Cretaceous Spences Bridge Group (SBG) comprises a series of basaltic to rhyolitic lavas and related volcaniclastic rocks (Pimainus Formation) overlain by a succession of mainly amygdaloidal andesites (Spins Formation) related to the closure of the Methow-Tyaughton basin and accretion of the Insular terrane in the North American Cordillera. Geochemical variation in the SBG is related primarily to metasomatic processes in the mantle wedge. Pimainus lavas include low- to high-K, tholeiitic and calc-alkaline types, and have isotopic compositions (epsilon(Nd)(100Ma) = + 5.2 to + 7.0, epsilon(Sr)(100Ma) = - 10 to - 20, Pb-206/Ph-204 = 18.82 to 18.91, Pb-207/Ph-204 = 15.55 to 15.60, Pb-208/Ph-204 38.24 to 38.43) between the ranges for primitive arcs and accreted terrane crust. Crustal sources are identified only for some low-medium K dacite and rhyolite compositions. The occurrence of intermediate compositions with high MgO contents (up to 6 wt%) and the presence of adakitic trace element features in medium-high K felsic lavas attests to metasomatism of the mantle wedge by slab melts during Pimainus volcanism. Spins lavas have comparable K2O and Ph isotopic compositions to the Pimainus, even higher MgO (up to 9.2 wt%), and display a mild intraplate character in having up to 0.6 wt% P2O5, 15 ppm Nb, and 240 ppm Zr. Spius Nd - Sr isotopic compositions (epsilon(Nd)(100Ma) = + 5.3 to + 6.9, epsilon(Sr)(100Ma) = - 14 to - 25) define an array extending from Pimainus to alkaline seamount compositions. The low epsilon(Sr) values, elevated high field strength element contents, and moderate silica contents suggest Spins volcanism was related to the introduction of small melt fractions from the asthenosphere into the mantle wedge which had previously generated Pimainus melts. The range of compositional types in the Pimainus Formation constrains tectonic scenarios to include an elevated slab thermal regime, likely from approach of an ocean ridge system toward the continental margin. Spins volcanism may have been generated by asthenospheric upwelling triggered by slab window development or slab-hinge rollback on closure of the Methow-Tyaughton basin. Copyright (C) 2002 John Wiley Sons, Ltd MH - Canada MH - Mexico|Morelos PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0072-1050 UR - ISI:000175737800006 L2 - arcs;North American Cordillera;Cretaceous;adakites;intraplate signatures;YOUNG PACIFIC SEAMOUNTS; MOUNT-ST-HELENS; TRACE-ELEMENT; ISLAND ARCS; SOUTHERNMOST CASCADES; SUBDUCTED LITHOSPHERE; MANTLE HETEROGENEITY; MAGNESIAN ANDESITES; CANADIAN CORDILLERA; MAGMA GENESIS SO - Geological Journal 2002 ;37(2):167-186 6856 UI - 11637 AU - Smith D AU - Hernandez-Avila M AU - Tellez-Rojo MM AU - Mercado A AU - Hu H AD - Univ Calif Santa Cruz, Santa Cruz, CA 95064, USAInst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca, Morelos, MexicoHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USASmith, D, Univ Calif Santa Cruz, Santa Cruz, CA 95064, USA TI - The relationship between lead in plasma and whole blood in women AB - Studies have suggested that plasma lead levels may better reflect the toxicologically labile fraction of circulator), Pb that is more freely available for exchange with target tissues than do Pb levels in whole blood. Studies have also reported an apparent severalfold variation in the relative partitioning of Pb between whole blood and plasma (or serum) for a given whole-blood Pb level, This may reflect inherent differences in the plasma Pb/whole blood Pb partitioning among individuals and/or methodologic challenges associated with the collection and analyses of samples that generally contain < 1-2 ng total Pb. Here, we conducted a longitudinal assessment of the relationship between Pb in whole blood and plasma in environmentally exposed reproductive-age women (n = 63) living in Mexico City, Mexico. We collected whole blood and plasma samples using trace metal clean techniques and analyzed them for Pb using high-resolution inductively coupled plasma mass spectrometry. A subset of subjects provided repeated blood samples weekly for 4 consecutive weeks (n = 17 subjects) or every 1-2 months over a 9-month period (n = 14 subjects). Plasma Pb concentration was significantly positively associated with whole-blood Pb in a curvilinear fashion over the range of blood Pb values observed here (2.13-39.7 mug/dL. This relationship was best described by the function Plasma Pb = e((2.392 + 0.0898) (x blood Pb)), where SEcoefficient at = 0.0054, SEConstant = 0.063 (n = 63 subjects, n = 141 observations). Results from the short- and long-term repeated collection subjects indicated that the within- and between-subject variance components were not significandy different between the two subsets of subjects. The betweensubjects component accounts for 78% of the variance in plasma Pb levels, while the residual variance (22%) may be attributed to other unmeasured factors. Collectively, this study demonstrates that plasma Pb measurements may be applied to general clinical settings, provided that established trace metal clean techniques are adopted. This study also shows that the relative (%) partitioning of whole-blood Pb in plasma naturally varies by a factor of about 2-4-fold among subjects at a given blood Ph level. Because Pb in the plasma is considered to more closely represent the frac i of Pb in the circulation that is readily exchanged with peripheral target tissues (e.g., brain, kidney, skeleton), the routine assessment of plasma Pb may provide a more meaningful measure of toxicologically available Pb MH - Mexico|Morelos MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 15 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000174311300025 L2 - blood;human;ICP-MS;lead;plasma;MASS-SPECTROMETRY METHOD; BONE LEAD; ICP-MS; ISOTOPE; HUMANS; SERUM; METABOLISM; POPULATION; CHILDREN; KINETICS SO - Environmental Health Perspectives 2002 ;110(3):263-268 6857 UI - 9728 AU - Smith SV AU - Renwick WH AU - Bartley JD AU - Buddemeier RW AD - Univ Hawaii, Dept Oceanog, Honolulu, HI 96822, USAMiami Univ, Dept Geog, Oxford, OH 45056, USAUniv Kansas, Kansas Geol Survey, Lawrence, KS 66047, USASmith, SV, CICESE, Dept Ecol, Ensenada, Baja California, Mexico TI - Distribution and significance of small, artificial water bodies across the United States landscape AB - At least 2.6 million small, artificial water bodies dot the landscape of the conterminous United States; most are in the eastern half of the country. These features account for approximately 20% of the standing water area across the United States, and their impact on hydrology, sedimentology, geochemistry, and ecology is apparently large in proportion to their area. These features locally elevate evaporation, divert and delay downstream water flow, and modify groundwater interactions. They apparently intercept about as much eroded soil as larger, better-documented reservoirs. Estimated vertical accretion rates are much higher, hence, inferred sedimentary chemical reactions must be different in the small features than in larger ones. Finally, these features substantially alter the characteristics of aquatic habitats across the landscape. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000179459100002 L2 - artificial water bodies;sediment accumulation;hydrology;conterminous United States;CARBON BURIAL; SEDIMENTATION; RESERVOIRS; DISCHARGE; EROSION; CYCLE SO - Science of the Total Environment 2002 ;299(1-3):21-36 6858 UI - 11383 AU - Soderberg BCG AU - Wallace JM AU - Tamariz J AD - W Virginia Univ, Dept Chem, Morgantown, WV 26506, USAIPN, Dept Organ Chem, Mexico City 11340, DF, MexicoSoderberg, BCG, W Virginia Univ, Dept Chem, Morgantown, WV 26506, USA TI - A novel palladium-catalyzed synthesis of 1,2-dihydroquinoxalines and 3,4-dihydroquinoxalinones AB - [GRAPHICS] Reactions of enamines, derived from 2-nitroanilines and alpha-substituted aldehydes, with carbon monoxide (6 atm) in the presence of a catalytic amount of bis(dibenzylideneacetone)palladium(0) (Pd(dba)(2)) and 1,3-bis(diphenylphosphino)propane (dppp) afford readily separated mixtures of 1,2-dihydroquinoxalines and 3,4-dihydroquinoxalinones. Addition of a catalytic amount of 1,10-phenanthroline to the reaction mixture substantially improved the yield of products MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1523-7060 UR - ISI:000174997600025 L2 - REDUCTIVE N-HETEROCYCLIZATION; CARBON-MONOXIDE; SUBSTITUTED NITROBENZENES; 2H-INDAZOLE DERIVATIVES; CARBONYLATION; NITROARENES; RUTHENIUM; INDOLES; DEOXYGENATION; 2-NITROSTYRENES SO - Organic Letters 2002 ;4(8):1339-1342 6859 UI - 9481 AU - Sohlenkamp C AU - Wood CC AU - Roeb GW AU - Udvardi MK AD - Max Planck Inst Mol Plant Physiol, D-14476 Golm, GermanyUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoForschungszentrum Julich GmbH, Inst Phytosphere Res, D-52425 Julich, GermanyUdvardi, MK, Max Planck Inst Mol Plant Physiol, Am Muhlenberg 1, D-14476 Golm, Germany TI - Characterization of Arabidopsis AtAMT2, a high-affinity ammonium transporter of the plasma membrane AB - AtAMT2 is an ammonium transporter that is only distantly related to the five members of the AtAMT1 family of high-affinity ammonium transporters in Arabidopsis. The short-lived radioactive ion (NH4+)-N-13 was used to show that AtAMT2, expressed in yeast (Saccharomyces cerevisiae), is a high-affinity transporter with a K-m for ammonium of about 20 mum. Changes in external pH between 5.0 and 7.5 had little effect on the K-m for ammonium, indicating that NH4+, not NH3, is the substrate for AtAMT2. The AtAMT2 gene was expressed in all organs of Arabidopsis and was subject to nitrogen (N) regulation, at least in roots where expression was partially repressed by high concentrations of ammonium nitrate and derepressed in the absence of external N. Although expression of AtAMT2 in shoots responded little to changes in root N status, transcript levels in leaves declined under high CO2 conditions. Transient expression of an AtAMT2-green fluorescent protein fusion protein in Arabidopsis leaf epidermal cells indicated a plasma membrane location for the AtAMT2 protein. Thus, AtAMT2 is likely to play a significant role in moving ammonium between the apoplast and symplast of cells throughout the plant. However, a dramatic reduction in the level of AtAMT2 transcript brought about by dsRNA interference with gene expression had no obvious effect on plant growth or development, under the conditions tested MH - Germany MH - Mexico|Morelos PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 28 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000179990100024 L2 - GREEN FLUORESCENT PROTEIN; DOUBLE-STRANDED-RNA; GLUTAMINE-SYNTHETASE; SACCHAROMYCES-CEREVISIAE; GENETIC INTERFERENCE; ROOT HAIRS; EXPRESSION; PLANTS; THALIANA; KINETICS SO - Plant Physiology 2002 ;130(4):1788-1796 6860 UI - 9924 AU - Sole J AU - Cosca M AU - Sharp Z AU - Enrique P AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Lausanne, Inst Mineral, CH-1015 Lausanne, SwitzerlandUniv New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131, USAUniv Barcelona, Dept Geoquim Petrol & Prospeccio Geol, Fac Geol, Barcelona 08028, SpainSole, J, Univ Nacl Autonoma Mexico, Inst Geol, Cd Univ, Mexico City 04510, DF, Mexico TI - Ar-40/Ar-39 geochronology and stable isotope geochemistry of Late-Hercynian intrusions from north-eastern Iberia with implications for argon loss in K-feldspar AB - The cooling history of Hercynian calc-alkalic, post-kinematic plutonic intrusions of the Montnegre massif (NE Spain) has been determined by Ar-40/Ar-39 analysis of two hornblendes, four biotites and eight K-feldspars (Kfs). The hornblendes have Ar-40/Ar-39 total fusion ages of 291+/-3 Ma and define the magmatic cooling of the basic and oldest structural intrusions. The biotites from the acid and intermediate rocks have Ar-40/Ar-39 plateau ages of 285+/-3 Ma, which date cooling of the intrusions through argon closure in biotite. The Ar-40/Ar-39 ages of the K-feldspars vary widely, ranging from 276-191 Ma. A correlation between K-feldspar Ar-40/Ar-39 total fusion age and several other features such as structural state, microstructures indicated by obliquity and, to some degree, optically visible perthites, is consistent with post-crystallisation partial argon loss in the K-feldspars. The deltaD values of the biotites also correlate with age and chlorite contents, but this is not so for the delta(18)O values of either feldspar or quartz. We infer that most microtextural changes occurred during cooling of the batholith, but a possibly Mesozoic, late disturbing hydrothermal event of weak intensity and with only minor fluid circulation must have occurred. This event provoked significant argon loss in the most structurally complex K-feldspars and is recorded in the hydrogen, but not oxygen, isotope data MH - Mexico|Distrito Federal MH - Spain MH - Switzerland MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1437-3254 UR - ISI:000178989500009 L2 - absolute-age;stable-isotopes;plutonic-rocks;biotite;hornblende;K-feldspar;obliquity;perthite;ALKALI FELDSPARS; HYDROGEN ISOTOPE; THERMAL HISTORY; EXCESS ARGON; BIOTITES; ROCKS; OXYGEN; FRACTIONATION; METAMORPHISM; MAGMATISM SO - International Journal of Earth Sciences 2002 ;91(5):865-881 6861 UI - 11113 AU - Solis C AU - Lagunas-Solar MC AU - Perley BP AU - Pina C AU - Aguilar LF AU - Flocchini RG AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Davis, Crocker Nucl Lab, Davis, CA 95616, USAPontificia Univ Catolica Valparaiso, Valparaiso, ChileSolis, C, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Development of a non-thermal accelerated pulsed UV photolysis assisted digestion method for fresh and dried food samples AB - A simple, fast digestion procedure for fresh and dried foods, using high-power pulsed UV photolysis in the presence of hydrogen peroxide, is being developed. The homogenized food samples were mixed with H2O2 or with a mixture of H2O2 and HNO3, and irradiated for short times with a 248-nm UV excimer laser. After centrifugation, a clear, colorless solution was obtained and aliquots were deposited on Teflon filters for XRF and/or PIXE analyses. Standard reference materials (NIST Peach Leaves; Typical Diet) were also analyzed to compare recoveries and detection limits. Improvements in detection limits were observed, but a few trace elements (<1 ppm) were not reproducibly detected (Fe, Sr). This method proved to be practical for the accelerated digestion of food samples and preparing analytes in short-time intervals. In combination with PIXE and XRF, it allows high-sensitivity multi-elemental analyses for screening the nutritional elements and for food safety purposes regarding the potential presence of toxic elements. Further development to optimize and validate this procedure for a broader range of analytes is in progress. (C) 2002 Elsevier Science B.V. All rights reserved MH - Chile MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000175595500015 L2 - pulsed UV photolysis;accelerated digestion;trace elements;PIXE;XRF SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2002 ;189():77-80 6862 UI - 8957 AU - Solomons NW AU - Valdes-Ramos R AD - CeSSIAM, Guatemala City, GuatemalaNatl Perinatol Inst, Mexico City, DF, MexicoSolomons, NW, CeSSIAM Guatemala, POB 02-5339,Sect 3163 GUATEMALA, Miami, FL 33102 USA TI - Dietary assessment tools for developing countries for use in multi-centric, collaborative protocols AB - In recent years, increasing interest in the format of multi-centric studies among different populations in developing nations has evolved in the field of health surveys and epidemiology. Dietary intake data are most often part of these cross-cultural and cross-national collaborative efforts. Various questions have been raised about the appropriate endeavours for dietetics and nutritional sciences in developing societies, the instruments available for application, and the pitfalls and caveats in their use. An important consideration is that studies be hypothesis-driven and not mere 'fishing expeditions' of unfocused data gathering. All known dietary intake measurement tools are within the purview of developing country research, but they often must be adapted individually and differentially to suit,a given population. In a multi-centric context, this is complicated. The watchword should be collecting comparable information across sites, not using identical approaches. Choice of dietary intake measurement tools must be honed to the hypotheses and assumptions, on the one hand, and the exigencies and pitfalls of working in the developing country milieu, in which linguistics, seasonality, migration, uncommonness of food systems and ethical considerations present barriers and caveats, on the other. Within the hypotheses, the assumptions regarding the penetration of the measured exposures must be borne in mind. Multi-centre studies in developing countries have relevance and importance in the context of food security, diet and disease, eating behaviour and satiety regulation, and nutritional anthropology MH - USA MH - Guatemala MH - Mexico|Distrito Federal PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health;Nutrition & Dietetics U5 - J;Article AV - English IS - 1368-9800 UR - ISI:000181402100021 L2 - dietary assessment;developing countries;multi-centre studies;nutritional epidemiology;MesoAmerica;FOOD FREQUENCY QUESTIONNAIRE; GLYCEMIC INDEX; NUTRITIONAL EPIDEMIOLOGY; OBESITY; GUATEMALA; REPRODUCIBILITY; ANTIOXIDANT; CONCORDANCE; GUIDELINES; DIVERSITY SO - Public Health Nutrition 2002 ;5(6A):955-968 6863 UI - 9529 AU - Solorio JMS AU - Sukow DW AU - Hicks DR AU - Gavrielides A AD - Washington & Lee Univ, Dept Phys & Engn, Lexington, VA 24450, USACtr Invest Opt, Guanajuato 37150, MexicoAFRL, DELO, Directed Energy Directorate, Kirtland AFB, NM 87117, USASukow, DW, Washington & Lee Univ, Dept Phys & Engn, 116 N Main St, Lexington, VA 24450 USA TI - Bifurcations in a semiconductor laser subject to delayed incoherent feedback AB - We examine experimentally and numerically the bifurcation sequence and route into chaos of a semiconductor laser subject to delayed incoherent feedback. We show that the sequence of bifurcations follows a three frequency scenario in which the steady-state of the laser destabilizes by a Hopf bifurcation at the relaxation frequency of the laser. Specifically, we show experimentally and numerically that the Hopf bifurcation can be supercritical or subcritical depending on the length of the delay and the pumping of the laser above threshold. This is followed by a torus bifurcation at the external cavity frequency and further by a tertiary bifurcation at a significantly lower frequency. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000179885500037 L2 - bifurcation;semiconductor laser;incoherent feedback;delayed feedback;OPTICAL FEEDBACK; OPTOELECTRONIC FEEDBACK; PERIODIC-SOLUTIONS; SYNCHRONIZATION; COMMUNICATION; INJECTION; MODEL; ROUTE SO - Optics Communications 2002 ;214(1-6):327-334 6864 UI - 10480 AU - Song LY AU - Mercado A AU - Vazquez N AU - Xie QZ AU - Desai R AU - George AL AU - Gamba G AU - Mount DB AD - Nashville VA Med Ctr, Dept Med, Nashville, TN 37232, USAVanderbilt Univ, Med Ctr, Dept Med, Nashville, TN 37232, USAVet Adm Med Ctr W Roxbury, Program Membrane Biol, Dept Med, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Boston, MA 02115, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 14000, DF, MexicoMount, DB, Nashville VA Med Ctr, Dept Med, Nashville, TN 37232, USA TI - Molecular, functional, and genomic characterization of human KCC2, the neuronal K-Cl cotransporter AB - The expression level of the neuronal-specific K-Cl cotransporter KCC2 (SLC12A5) is a major determinant of whether neurons will respond to GABA with a depolarizing, excitatory response or a hyperpolarizing, inhibitory response. In view of the potential role in human neuronal excitability we have characterized the hKCC2 cDNA and gene. The 5.9 kb hKCC2 transcript is specific to brain, and is induced during in vitro differentiation of NT2 teratocarcinoma cells into neuronal NT2-N cells. The 24-exon SLC12A5 gene is on human chromosome 20q13, and contains a polymorphic dinucleotide repeat within intron 1 near a potential binding site for neuron-restrictive silencing factor. Expression of hKCC2 cRNA in Xenopus laevis oocytes results in significant Cl--dependent Rb-86(+) uptake under isotonic conditions; cell swelling under hypotonic conditions causes a 20-fold activation, which is blocked by the protein phosphatase inhibitor calyculin-A. In contrast, oocytes expressing mouse KCC4 do not mediate isotonic K-Cl cotransport but express much higher absolute transport activity than KCC2 oocytes under hypotonic conditions. Initial and steady state kinetics of hKCC2-injected oocytes were performed in both isotonic and hypotonic conditions, revealing K(m)s for K+ and Cl of 9.3 +/- 1.8 mM and 6.8 +/- 0.9 mM, respectively; both affinities are significantly higher than KCCl and KCC4. The Km for Cl- is close to the intracellular Cl- activity of mature neurons, as befits a neuronal efflux mechanism. (C) 2002 Elsevier Science B V All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 28 U4 - Neurosciences U5 - J;Article AV - English IS - 0169-328X UR - ISI:000177440400009 L2 - GABA;POLYMORPHIC DINUCLEOTIDE REPEAT; RED-BLOOD-CELLS; GABA(A) RECEPTOR; PROMOTER ACTIVITY; INTRACELLULAR CHLORIDE; SHEEP ERYTHROCYTES; BUMETANIDE BINDING; EXCITATORY ACTIONS; RAT HIPPOCAMPUS; GENE SO - Molecular Brain Research 2002 ;103(1-2):91-105 6865 UI - 10622 AU - Song S AU - Lu S AU - Lopez-Valdivieso A AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Sci & Technol Beijing, Resources Engn Sch, Beijing 100083, Peoples R ChinaSong, S, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550,Lomas 2A Secc, San Luis Potosi 78210, Mexico TI - Magnetic separation of hematite and limonite fines as hydrophobic flocs from iron ores AB - Magnetic separation of weakly magnetic iron mineral fines in the form of flocs, which is termed Floc Magnetic Separation (FMS) process, has been studied in the present work, in order to find a substitution for high-intensity or high-gradient magnetic separators to treat the ores with weakly magnetic iron minerals in the fine size range. This study was performed on a hematite ore and a limonite ore that were finely ground to be micron particles, through the hydrophobic flocculation induced by sodium oleate and kerosene to make flocs. The experimental results have shown that the FMS process is effective to recover hematite and limonite fines at a middle magnetic field intensity, greatly increased the separation efficiency, compared with the conventional magnetic separation at the same conditions. By applying the process to the fine hematite ore containing 30.5% Fe, a concentrate assaying 64% Fe with 82% recovery has been produced. It has been found that the separation efficiency of the FMS process closely correlates with the main parameters of hydrophobic flocculation such as sodium oleate addition, conditioning time and kerosene addition. This finding suggests that the high efficiency achieved by the FMS process might be attributed to the considerable increase of the magnetic force on the iron mineral fines in the form of hydrophobic flocs in a magnetic field, thus the fines can be held by the separation plates in a magnetic separator and then be collected as magnetic concentrates. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|San Luis Potosi MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0892-6875 UR - ISI:000176966200003 L2 - flocculation;fine particle processing;magnetic separation;iron ores;SPHALERITE FINES; FLOCCULATION; FLOTATION; PARTICLES; MINERALS SO - Minerals Engineering 2002 ;15(6):415-422 6866 UI - 11545 AU - Song SX AU - Lopez-Valdivieso A AU - Lu SC AU - Ouyang J AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Sci & Technol Beijing, Resources Engn Sch, Beijing 100083, Peoples R ChinaSong, SX, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Selective dispersion in a diaspore-rutile suspension by sodium fluorosilicate AB - Heterocoagulation and dispersion of diaspore and rutile fines in aqueous suspensions have been studied through the measurements of aggregation efficiency, zeta potentials, particle hydrophilicity and IR spectra. This study was performed on 2.7-mum rutile and 3,7-mum diaspore in volumetric mean diameter. The experimental results have demonstrated that around pH 5.0 sodium fluorosilicate (SFS) can induce a selective dispersion of diaspore fines in a diaspore-rutile suspension, leaving rutile fines to coagulate. This finding would be very helpful in developing a new process for the separation of rutile and diaspore fines. The mechanism by which SFS selectively dispersed diaspore fines in a diaspore-rutile suspension has been found to be due to the adsorption of SiF62- on diaspore surfaces instead of rutile particles. This adsorption strongly increased the negative zeta potential and the hydrophilicity of the particles, and thereby the electrical double layer and the solvation repulsive forces. The latter plays a predominant role in the selective dispersion. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Peoples R China PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0032-5910 UR - ISI:000174483700007 L2 - selective dispersion;rutile fines;diaspore fines;sodium fluorosilicate;SURFACES; HEMATITE SO - Powder Technology 2002 ;123(2-3):178-184 6867 UI - 9878 AU - Sorhaindo A AU - Becker D AU - Fletcher H AU - Garcia SG AD - Populat Council, Mexico City, DF, MexicoUniv Hosp W Indies, Kingston, JamaicaGarcia, SG, Populat Council, Mexico City, DF, Mexico TI - Emergency contraception among university students in Kingston, Jamaica: a survey of knowledge, attitudes, and practices AB - Emergency contraceptives (ECs) are an important option for young women in Jamaica, where rates of unplanned pregnancy are high. Few previous studies of EC exist in Jamaica. We surveyed a random sample of 205 students living on campus at the University of the West Indies in Kingston, Jamaica, to learn more about students' knowledge and opinions of EC pills (ECPs). General awareness of ECPs was high (84%), although many students were unaware of specific details regarding the method's appropriate use, such as the time frame. Twenty students (10%) had used ECPs themselves or had a partner who had used them. Most had used ECPs for the first time because they lacked contraception or because of contraceptive failure. Following their first use of ECPs, 55% adopted an ongoing method of contraception. Most students felt ECPs were an important option for women in Jamaica; however, some feared ECPs might be overused. Future educational campaigns should provide Jamaican university students with detailed information about this method. (C) 2002 Elsevier Science Inc. All rights reserved MH - Jamaica MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 8 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000179192400010 L2 - emergency contraception;Jamaica;university students;pregnancy;family planning;PROVIDERS SO - Contraception 2002 ;66(4):261-268 6868 UI - 10222 AU - Sosa-Sanchez JL AU - Galindo A AU - Gnecco D AU - Bernes S AU - Fern GR AU - Silver J AU - Sosa-Sanchez A AU - Enriquez RG AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Disposit Semicond, Puebla 72570, MexicoBenemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla, MexicoUniv Greenwich, Sch Chem & Life Sci, London SE18 6PF, EnglandUNAM, Inst Quim, Mexico City, DF, MexicoSosa-Sanchez, JL, Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Disposit Semicond, Blvd 14 Sur & Av San Claudio,Ciudad Univ Puebla, Puebla 72570, Mexico TI - Synthesis and characterization of a new (phthalocyaninato)bis(carboxylate) silicon(IV) compound with increased solubility AB - The synthesis and spectroscopic characterization of a new soluble silicon(IV) phthalocyanine complex is presented. The compound shows an increased solubility compared to its SiPcCl2 precursor and this allowed solution H-1 NMR characterization. The assignment of the H-1 NMR signals for the axial ligands is greatly facilitated due to the anisotropic high ring current effects from the macrocycle. In addition, good quality crystals were grown from this more soluble material for molecular structure determination by single-crystal X-ray diffraction analysis. The molecular structure determination shows that the complex crystallizes in a non-centrosymmetric space group due to the inherent chirality of the naproxene ligands. Bond lengths and angles fit well to other analogous compounds previously reported. Copyright (C) 2002 Society of Porphyrins & Phthalocyanines MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - DIJON: SOC PORPHYRINS & PHTHALOCYANINES RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1088-4246 UR - ISI:000178134700003 L2 - axially substituted phthalocyanines;increased solubility;molecular structure;anisotropic ring current effects;PHTHALOCYANINE SO - Journal of Porphyrins and Phthalocyanines 2002 ;6(3):198-202 6869 UI - 10152 AU - Sosa M AU - Carneiro AAO AU - Baffa O AU - Colafemina JF AD - Univ Guanajuato, Inst Fis, Leon, Guanajuato, MexicoUniv Sao Paulo, FFCLRP, Dept Fis & Matemat, BR-14040901 Ribeirao Preto, SP, BrazilUniv Sao Paulo, FMRP, Dept Otorrinolaringol, BR-14049900 Ribeirao Preto, SP, BrazilSosa, M, Univ Guanajuato, Inst Fis, Leon, Guanajuato, Mexico TI - Human ear tympanum oscillation recorded using a magnetoresistive sensor AB - A magnetic probe using a commercial magnetoresistive sensor for monitoring the dynamics of the human tympanic membrane has been developed. The method is based on the measurement of the magnetic flux changes produced by the vibrations of a small magnet attached to the tympanic membrane. The system was evaluated with respect to its applicability to detect displacement amplitudes in the tympanum by measurements performed in an excised temporal bone. A sensitivity sufficient to detect vibrations down to about 65x10(-9) m was observed for a wide range of frequencies between 200 Hz and 5.0 kHz. Displacement amplitudes of 400 nm on average were detected with an error of +/-65 nm. (C) 2002 American Institute of Physics MH - Brazil MH - Mexico|Guanajuato PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000178257400042 L2 - MIDDLE-EAR; MEMBRANE SO - Review of Scientific Instruments 2002 ;73(10):3695-3697 6870 UI - 10322 AU - Soto-Pinto L AU - Perfecto I AU - Caballero-Nieto J AD - Colegio Frontera Sur, Chiapas 29200, San Cristobal, MexicoUMICH, Sch Nat Resources & Environm, Ann Arbor, MI 48109, USAUniv Nacl Autonoma Mexico, Jardin Bot, Mexico City 04510, DF, MexicoSoto-Pinto, L, Colegio Frontera Sur, Apartado Postal 63, Chiapas 29200, San Cristobal, Mexico TI - Shade over coffee: its effects on berry borer, leaf rust and spontaneous herbs in Chiapas, Mexico AB - The objective of this research was to determine the relationships between different ecological features of shade and the incidence of coffee berry borer, coffee leaf rust and spontaneous herbs in rustic coffee plantations in Chiapas, Mexico. Thirty-six 10 m by 10 m plots were established within coffee plantations. The following variables were measured or estimated: number of vegetation strata, percent canopy cover, direct, diffuse and total sunlight below the canopy, plant species richness and diversity, shade tree/shrub density, altitude, aspect, basal area, yields, percentage of coffee berry borer (Hypothenemus hampei Ferr), percentage of coffee leaf rust (Hemileia vastatrix Berk & Br.), percentage of spontaneous herb cover and the presence of paths and runoffs. Results showed a complex agroforestry system, composed of five strata. Coffee berry borer and coffee leaf rust incidence averages were 1.5% and 10.1%, respectively. Average spontaneous herb cover was 34.1%. Coffee leaf rust percentage correlated positively with the coffee berry borer. Number of strata of shade vegetation correlated negatively with leaf rust, while the presence of paths correlated positively with the leaf rust. Species richness and diversity correlated negatively to broad-leaf-herb cover and the presence of runoffs correlated positively to this last variable. Shade tree density (> 10 cm d.b.h.) correlated negatively to linear-leaf-herb cover. Percentage of shade cover, light, coffee density, aspect, stand age, basal area and yields were not correlated to pest, disease and weeds. Results support the ecological theory that postulates that diversity and structural complexity in mixed plant systems maintain a healthy system MH - Mexico|Distrito Federal MH - Mexico|Chiapas MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Agronomy;Forestry U5 - J;Article AV - English IS - 0167-4366 UR - ISI:000177978600005 L2 - basal area;crop protection;ecological diversity;shade density;species richness;vegetation strata;PEST-MANAGEMENT; BIODIVERSITY; PATHOGENS; SYSTEMS SO - Agroforestry Systems 2002 ;55(1):37-45 6871 UI - 10987 AU - Soto E AU - Vega R AU - Budelli R AD - Benemetria Univ Autonoma Puebla, Inst Fisiol, Puebla 72000, MexicoUniv Republica, Fac Ciencias, Inst Biol, Montevideo, UruguaySoto, E, Benemetria Univ Autonoma Puebla, Inst Fisiol, Apartado Postal 406, Puebla 72000, Mexico TI - The receptor potential in type I and type II vestibular system hair cells: A model analysis AB - Several studies have shown that type I hair cells present a large outward rectifying potassium current (g(K,L)) that is substantially activated at the resting potential, greatly reducing cell input resistance and voltage gain. In fact, mechanoelectrical transducer currents seem not to be large enough to depolarize type I hair cells to produce neurotransmitter release. Also, the strongly nonlinear transducer currents and the limited voltage oscillations found in some hair cells did not account for the bidirectionality of response in hair cell systems. We developed a model based in the analysis of nonlinear Goldman-Hodgkin-Katz equations to calculate the hair cell receptor potential and ionic movements produced by transducer current activation. Type I hair cells displaying the large g(K,L) current were found to produce small receptor potentials (3-13.8 mV) in response to mechanoelectrical transducer current input. In contrast, type II cells that lack g(K,L) produced receptor potentials of about 30 mV. Properties of basolateral ionic conductances in type II hair cells will linearize hair bundle displacement to receptor potential relationship, The voltage to obtain the half maximal activation of g(K,L) significantly affects the resting membrane potential, the amplitude. and the linearity of the receptor potential, Electrodiffusion equations were also used to analyze ionic changes in the intercellular space between type I hair cell and calyx endings. Significant K+ accumulation could take place at the intercellular space depending on calyx structure, (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - Uruguay PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences;Otorhinolaryngology U5 - J;Article AV - English IS - 0378-5955 UR - ISI:000176006000005 L2 - transduction;vestibular;sensory coding;membrane potential;afferent synapse;IONIC CURRENTS; K+ CHANNELS; MECHANOELECTRICAL TRANSDUCTION; POTASSIUM CURRENTS; CRISTA-AMPULLARIS; DELAYED RECTIFIER; CALCIUM CHANNELS; FROG; CONDUCTANCE; AFFERENTS SO - Hearing Research 2002 ;165(1-2):35-47 6872 UI - 10967 AU - Soto G AU - Diaz JA AU - de la Cruz W AU - Contreras O AU - Moreno M AU - Reyes A AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USASoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Epitaxial alpha-Be3N2 thin films grown on Si substrates by reactive laser ablation AB - Beryllium nitride thin films were grown on (1 1 1) and (1 0 0) silicon substrates by laser ablating a beryllium foil in molecular nitrogen ambient from room temperature up to 900 degreesC. Resulting films were characterized using scanning and transmission electron microscopies, X-ray diffraction, Auger electron and X-ray photoelectron spectroscopies. Epitaxial films were achieved at substrate temperatures of 750 degreesC on (1 1 1)-Si. The diffraction measurements are in agreement with the alpha-Be3N2 phase. The orientation relationship between film-substrate corresponds to [1 1 0](Si)parallel to [2 (1) over bar 0](Be3N2) and (1 (1) over bar 1)(Si)parallel to ((1) over bar (2) over bar 3)(Be3N2) (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000176024800009 L2 - beryllium nitride;laser ablation;thin films;epitaxy;ELECTRONIC-STRUCTURE; BERYLLIUM SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2002 ;94(1):62-65 6873 UI - 12025 AU - Soto G AU - Diaz JA AU - Machorro R AU - Reyes-Serrato A AU - de la Cruz W AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoCtr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoReyes-Serrato, A, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Beryllium nitride thin film grown by reactive laser ablation AB - Beryllium nitride thin films were grown on silicon substrates by laser ablating a beryllium foil in molecular nitrogen ambient. The composition and chemical state were determined with Auger (AES), X-ray photoelectron (XPS) and energy loss (EELS) spectroscopies. A low absorption coefficient in the visible region and an optical bandgap of 3.8 eV, determined by reflectance ellipsometry, were obtained for films grown at nitrogen pressures higher than 25 mTorr. The results show that the reaction of beryllium with nitrogen is very effective using this preparation method in producing high quality films. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000173168200007 L2 - beryllium nitrides;laser ablation;thin films;wide bandgap;optical properties;ENERGY SO - Materials Letters 2002 ;52(1-2):29-33 6874 UI - 11518 AU - Soto H AU - Diaz CA AU - Topomondzo J AU - Erasme D AU - Schares L AU - Guekos G AD - Ctr Invest Cient & Educ Super, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoEcole Natl Super Telecommun Bretagne, Dept Commun, CNRS URA 820, F-75634 Paris 13, FranceSwiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, SwitzerlandSoto, H, Ctr Invest Cient & Educ Super, Div Fis Aplicada, Ensenada 22800, Baja California, Mexico TI - All-optical AND gate implementation using cross-polarization modulation in a semiconductor optical amplifier AB - In this letter, we demonstrate experimentally a new design for an all-optical AND gate operating in the gigahertz regime using the cross-polarization modulation effect in a semiconductor optical amplifier. The efficiency of this effect was estimated by measuring the conversion coefficients C-TE/TM and C-TM/TE indicating the TE to TM mode conversion and vice versa when the amplifier is perturbed with a wavelength tunable control beam. The all-optical gate here described differ from others developed before using semiconductor optical amplifiers in its ability to operate on nondegenerate input signals and to produce an output signal with an independent wavelength of the wavelengths of the input signals MH - France MH - Mexico|Baja California MH - Switzerland PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 17 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000174666100022 L2 - Boolean functions;optical logic devices;optical propagation in nonlinear media;optical waveguides;optoelectronic devices;semiconductor optical amplifiers SO - Ieee Photonics Technology Letters 2002 ;14(4):498-500 6875 UI - 9605 AU - Soulie-Marsche I AU - Benammi M AU - Gemayel P AD - Univ Montpellier 2, Lab Paleobot CP 062, CNRS, UMR 5554, F-34095 Montpellier 05, FranceUniv Nacl Autonoma Mexico, Lab Palaeomagnetismo, Inst Geofis, Mexico City, DF, MexicoSoulie-Marsche, I, Univ Montpellier 2, Lab Paleobot CP 062, CNRS, UMR 5554, Pl E Bataillon, F-34095 Montpellier 05, France TI - Biogeography of living and fossil Nitellopsis (Charophyta) in relationship to new finds from Morocco AB - Aim To document the distribution of two closely related macrophyte species, the fossil Nitellopsis (Tectochara ) merianii (A. Braun ex Unger) Grambast & Soulie-Marsche and Nitellopsis obtusa (Desvaux) J. Groves, the single living species of genus Nitellopsis and to draw the relationships between first finds of N. merianii in North Africa and previously known records. Location South part of the High Atlas Range, Ait Kandoula basin, Morocco. Methods New finds of fossil charophyte gyrogonites were determined and illustrated. Using a large bibliographic database of both fossil and extant charophytes, we depict the biogeographical distribution N. merianii and N. obtusa and summarize the ecological requirements of N. obtusa as a modern analogue. Results The Ait Kandoula deposits, dated by magnetostratigraphy and vertebrate fossils to Upper Miocene, provided the first fossil populations of N. merianii in Africa. The distribution patterns of the Tertiary N. merianii and the living N. obtusa superimpose on a large area that extends from Spain to East Asia and characterize them as typically Eurasian taxa indicative for permanent, relatively cold and deep freshwater lakes. During the Quaternary, similar palaeolakes in the Sahara were colonized by N. obtusa . Main conclusions The presence of the Eurasian species N. merianii in North Africa is the result of dispersal by migratory waterbirds and attests to N-S migration occurring during the Upper Miocene (10-5 Myr ago). Gyrogonites imported from Southern Europe could germinate and fulfil their life cycle so as to form a new seed bank of gyrogonites because they had been deposited in a suitable environment consisting of a freshwater mountain lake MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0305-0270 UR - ISI:000179767400006 L2 - historical biogeography;palaeolimnology;Tertiary;Messinian;charophytes;Ait Kandoula basin;Africa;Eurasia;HIGH ATLAS; MIOCENE; BASIN SO - Journal of Biogeography 2002 ;29(12):1703-1711 6876 UI - 10138 AU - Souza V AU - Travisano M AU - Turner PE AU - Eguiarte LE AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Houston, Dept Biol & Biochem, Houston, TX 77204, USAYale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06520, USASouza, V, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Apartado Postal 70-275, Mexico City 04510, DF, Mexico TI - Does experimental evolution reflect patterns in natural populations? E-coli strains from long-term studies compared with wild isolates AB - Our results show that experimental evolution mimics evolution in nature. In particular, only 1000 generations of periodic recombination with immigrant genotypes is enough for linkage disequilibrium values in experimental populations to change from a maximum linkage value to a value similar to the one observed in wild strains of E. coli. Our analysis suggests an analogy between the recombination experiment and the evolutionary history of E. coli; the E. coli genome is a patchwork of genes laterally inserted in a common backbone, and the experimental E. coli chromosome is a patchwork where some sites are highly prone to recombination and others are very clonal. In addition, we propose a population model for wild E. coli where gene flow (recombination and migration) are an important source of genetic variation, and where certain hosts act as selective sieves; i.e., the host digestive system allows only certain strains to adhere and prosper as resident strains generating a particular microbiota in each host. Therefore we suggest that the strains from a wide range of wild hosts from different regions of the world may present an ecotypic structure where adaptation to the host may play an important role in the population structure MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 0003-6072 UR - ISI:000178390200014 L2 - Escherichia coli;experimental evolution;genetic structure;population genetics;recombination;wild isolates;ESCHERICHIA-COLI; GENETIC-STRUCTURE; 10,000-GENERATION EXPERIMENT; MOLECULAR EVOLUTION; RECOMBINATION; DYNAMICS; DIVERGENCE; ADAPTATION; CHROMOSOME; GENOTYPES SO - Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 2002 ;81(1-4):143-153 6877 UI - 10579 AU - Spirin VV AU - Mendieta FJ AU - No K AD - CICESE, Div Fis Aplicada, Ensenada, Baja California, MexicoKorea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South KoreaSpirin, VV, CICESE, Div Fis Aplicada, Apdo Postal 2732, Ensenada, Baja California, Mexico TI - Measurement of the differential Pockels and Kerr coefficients of thin films by a two-beam polarization interferometer with a reflection configuration AB - A simple procedure for the measurement of the linear and quadratic electrooptic coefficients of thin films by two-beam polarization (TBP) interferometery is developed. Differential electrooptic coefficients that allow clear mathematical definition and can be measured using a modulation method are introduced. It is shown that a TBP interferometer allows measuring both differential Pockels and Kerr coefficients of a thin film with a strong Fabry-Perot (FP) effect that is already present in thin films without special antireflection coating. The measured values of the electrooptic coefficients of PZT thin film are in agreement with the known data MH - Mexico|Baja California MH - South Korea PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000177216700054 L2 - Pockels;Kerr electrooptic coefficients;PZT thin film;POLED POLYMER-FILMS; ELECTROOPTIC COEFFICIENT SO - Ferroelectrics 2002 ;271():1911-1916 6878 UI - 11154 AU - Spirin VV AU - Shlyagin MG AU - Miridonov SV AU - Swart PL AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoRAU, Dept Elect & Elect Engn, ZA-2006 Auckland Pk, South AfricaSpirin, VV, CICESE, Div Fis Aplicada, Apdo Postal 2732,CP 22860, Ensenada 22860, Baja California, Mexico TI - Alarm-condition detection and localization using Rayleigh scattering for a fiber-optic bending sensor with an unmodulated light source AB - We present a simple method for the localization of a bending loss region for a fiber-optic alarm-condition sensor based on the measurement of transmitted and Rayleigh backscattered power. Bending the sensing fiber affects both the transmitted and backscattered power of unmodulated continuous-wave (CW) light that is launched into the fiber. The position of the loss region is determined from unique relationships between normalized transmitted and backscattered powers for different locations of the disturbance along the fiber. The localization of a strong disturbance with an accuracy of 1 m at positions near the source-end and of 5 in at positions near the remote-end of a 4.04 km length singlemode fiber was demonstrated. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - South Africa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000175550200005 L2 - fiber-optic sensor;Rayleigh scattering;bending losses;FREQUENCY-DOMAIN REFLECTOMETRY; SINGLE-MODE FIBERS; BACKSCATTERING SO - Optics Communications 2002 ;205(1-3):37-41 6879 UI - 11766 AU - Spirin VV AU - Shlyagin MG AU - Miridonov SV AU - Swart PL AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoRand Afrikaans Univ, Fac Engn, EE Dept, ZA-2006 Auckland Pk, South AfricaSpirin, VV, CICESE, Div Fis Aplicada, Apdo Postal 2732, Ensenada 22860, Baja California, Mexico TI - Transmission/reflection analysis for distributed optical fibre loss sensor interrogation AB - A novel interrogation method for fibre optic loss sensors based on the analysis of transmitted and reflected powers of a continuous wave light source is presented. The position of the loss region is determined from unique dependencies between normalised powers for different locations of the disturbance along the fibre containing a number of Bragg gratings MH - Mexico|Baja California MH - South Africa PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000173870400010 L2 - FREQUENCY-DOMAIN REFLECTOMETRY SO - Electronics Letters 2002 ;38(3):117-118 6880 UI - 9054 AU - Stamps J AU - Calderon-de Anda M AU - Perez C AU - Drummond H AD - Univ Calif Davis, Davis, CA 95616, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City, DF, MexicoStamps, J, Univ Calif Davis, Davis, CA 95616, USA TI - Collaborative tactics for nestsite selection by pairs of blue footed boobies AB - The dual concern model suggests that pairs of animals can use four different behavioural strategies to resolve disputes that arise when making joint decisions. Based on their reproductive biology, we predicted that mated pairs of blue footed boobies would use one of these strategies, collaboration, when deciding on a location for their nest. Many of the behaviour tactics diagnostic of collaboration were observed in boobies. For instance, nestsite selection was accompanied by extensive exchanges of a specialized communication signal (nestpointing), rates of nestpointing at a given site were strongly related to the likelihood that a pair would select that site for their nest, couples in which the mate and female 'disagreed' about the merits of an initial site went on to investigate additional sites together ('expanding the pie'), individuals pointed at maximal rates at a site only after their partner had already pointed at that same site ('feeling out procedures'), and both sexes appeared to have 'veto power' over potential nestsites, in the sense that a site was virtually never accepted for the nest if one of the two partners failed to point at that site prior to clutch initiation. These results support the hypothesis that mated pairs of blue footed boobies may use collaborative tactics when selecting a nestsite; descriptive accounts suggest that similar tactics may occur in other birds in which mated pairs jointly decide on the location for their nest MH - Mexico|Distrito Federal MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 6 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0005-7959 UR - ISI:000181286600001 L2 - decision-making;nestsite selection;dispute resolution;collaboration;LEARNING-BASED MODEL; BEHAVIOR; SHAPE; SIZE; BEES SO - Behaviour 2002 ;139():1383-1412 6881 UI - 9570 AU - Steinmann VW AU - Porter JM AD - Rancho Santa Ana Bot Garden, Claremont, CA 91711, USASteinmann, VW, Ctr Reg Bajio, AC, Inst Ecol, AP 386, Patzcuaro 61600, Michoacan, Mexico TI - Phylogenetic relationships in Euphorbieae (Euphorbiaceae) based on its and ndhF sequence data AB - The monophyly and phylogenctic relationships of the tribe Euphorbieae (Euphorbiaceae) were evaluated using separate weighted maximum parsimony analyses of nucleotide sequences of the nrDNA internal transcribed spacer (ITS) region and cpDNA coding region ndhF. The study included 223 ingroup species representing nearly all of the previously recognized genera, subgenera, and sections within the Euphorbieae and 4 outgroup taxa from the tribe Hippomaneae (Euphorbiaceae). Both the ITS and ndhF analyses support the monophyly of Euphorbieae in addition to the monophyly of its three subtribes, Anthosteminae, Neoguillauminiinae, and Euphorbiinae. Within Euphorbiinae, there are four major clades, only one of which corresponds with a previously recognized taxon; the three remaining clades are conglomerates of various subgenera and sections. The majority of the subtribe is composed of a paraphyletic Euphorbia. All other genera Currently recognized ill the subtribe are nested within Euphorbia. In addition, Synadenium and Endadellium, are nested within Monadenium. Within Euphorbia, the majority of the currently recognized subgenera are either paraphyletic or polyphyletic. Biogeographical patterns examined in light of the molecular evidence suggest that the tribe Euphorbieae arose in Africa, possibly before the breakup of Gondwanaland, at which time the major lineages of subtribe Euphorbiinae were already present. It is argued that the best solution for Euphorbia classification is a broad circumscription of Euphorbia that contains all of the about 2000 species of the subtribe Euphorbiinae MH - Mexico|Michoacan MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 24 U4 - Plant Sciences U5 - J;Article AV - English IS - 0026-6493 UR - ISI:000179804200001 L2 - classification;Euphorbia;Euphorbieae;ITS;ndhF;TRIBE EUPHORBIEAE; SOMALIA SO - Annals of the Missouri Botanical Garden 2002 ;89(4):453-490 6882 UI - 10216 AU - Stenkin YV AU - Valdes-Galicia JF AD - Russian Acad Sci, Inst Nucl Res, Moscow 117312, RussiaNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoStenkin, YV, Russian Acad Sci, Inst Nucl Res, 60th October Anniv Prosp 7A, Moscow 117312, Russia TI - On the neutron bursts origin AB - The origin of the neutron bursts in Extensive Air Showers (EAS) is explained using results of the experiments and CORSIKA based Monte-Carlo simulations. It is shown that events with very high neutron multiplicity observed last years in neutron monitors as well as in surrounding detectors, are caused by the usual EAS core with primary energies > 1 PeV. No exotic processes were needed for the explanation MH - Mexico|Distrito Federal MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000178201000007 L2 - neutron burst;EAS;neutron monitor SO - Modern Physics Letters A 2002 ;17(26):1745-1751 6883 UI - 9768 AU - Stepanian JA AU - Chavushyan VH AU - Carrasco L AU - Valdes JR AU - Mujica RM AU - Tovmassian HV AU - Ayvazyan VT AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Nacl Astrofis Opt & Elect, Puebla, MexicoUniv Nacl Autonoma Mexico, Observ Astron Nacl, Mexico City 04510, DF, MexicoRussian Acad Sci, Special Astrophys Observ, Moscow 117901, RussiaArmenian State Pedag Inst, Yerevan, ArmeniaStepanian, JA, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Spectral observations of faint Markarian galaxies of the second Byurakan survey. III (vol 124, pg 1283, 2002) MH - Armenia MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Correction AV - English IS - 0004-6256 UR - ISI:000179361700042 SO - Astronomical Journal 2002 ;124(6):3486-3491 6884 UI - 10406 AU - Stepanian JA AU - Chavushyan VH AU - Carrasco L AU - Valdes JR AU - Mujica RM AU - Tovmassian HM AU - Ayvazyan VT AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoSpecial Astrophys Observ, Zelenchukskaya 36917, Karachaevo Cher, RussiaArmenian State Pedagog Inst, Yerevan 375010, ArmeniaStepanian, JA, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - Spectral observations of faint Markarian galaxies of the Second Byurakan Survey. III AB - We continue our program of spectroscopic observations of objects from the Second Byurakan Survey (SBS). This survey contains more than 3600 objects with m(pg) < 19.5 mag, half of them being galaxies and the other half being starlike objects. The aim of this work is to compile a complete sample of faint ( B < 17) Markarian galaxies. Here we present spectroscopic data for 185 galaxies, obtained with the 6 m telescope of the Special Astrophysical Observatory in Russia and the 2.1 m telescope of the Guillermo Haro Astrophysical Observatory in Mexico. In the present subsample, we find three new Seyfert 1 galaxies ( SBS 0654+598, 1118+541, and 1320+551); one narrow-line Seyfert 1 ( SBS 0748+499), one Seyfert 2 ( SBS 0925+585), and three Seyfert 2/LINER ( SBS 0811+584, 1344+527, and 1428+529) galaxies; 12 LINERs; 13 blue compact dwarf galaxies; 65 starburst nuclei; 85 emission-line galaxies; and two absorption galaxies. Relevant astrophysical parameters ( magnitude, redshift, relative intensities of emission lines, etc.) are given for the observed galaxies MH - Armenia MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000177589300004 L2 - galaxies : active;galaxies : Seyfert;galaxies : starburst;EMISSION-LINE GALAXIES; SKY SURVEY SO - Astronomical Journal 2002 ;124(3):1283-1307 6885 UI - 10574 AU - Stepanov S AU - Seres I AU - Mansurova S AU - Nolte D AD - INAOE, Puebla 72000, MexicoUniv Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoPurdue Univ, Dept Phys, W Lafayette, IN 47907, USAStepanov, S, INAOE, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Characterization of photorefractive GaAlAs multiple quantum well structures by ac photoelectromotive force and modulated photocarrier grating techniques AB - Simultaneous utilization of ac photoelectromotive (photo-EMF) and modulated photocarrier grating (MPG) techniques for characterization of bipolar transport in semi-insulating photorefractive GaAlAs multiple quantum well structure is reported. From the ac photo-EMF experiment the electrons were determined as the dominant photocarriers for interband optical excitation at lambda=633 nm. From the self-consistent data obtained from photo-EMF and MPG experiments the diffusion length of the photoelectrons was evaluated as L(D)similar or equal to1.4+/-0.2 mum, and that of the photoholes (minority carriers)-as L(Dm)similar or equal to0.6+/-0.1 mum. In the MPG configuration, the contrast of the illuminating interference pattern was controlled by electro-optic modulation of the signal beam polarization, which allowed us to measure dielectric relaxation time of the photoconductor as well. As evaluated by both techniques it proved to be about tau(di)similar or equal to0.05 mus for the average light intensity I(0)similar or equal to0.3 mW/mm(2). The proposed combination of the characterization techniques seems to be especially promising for amorphous a-Si and polymer films. (C) 2002 American Institute of Physics MH - Mexico|Morelos MH - Mexico|Puebla MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000177171700015 L2 - SPACE-CHARGE FIELD; DIFFUSION LENGTH MEASUREMENT; PHOTOCONDUCTIVE SEMICONDUCTORS; STATE; PHOTOCURRENTS; ENHANCEMENT; BANDWIDTH; LIFETIME; CRYSTALS; SIGNAL SO - Journal of Applied Physics 2002 ;92(4):1825-1832 6886 UI - 9856 AU - Stinnesbeck W AU - Keller G AU - Schulte P AU - Stuben D AU - Berner Z AU - Kramar U AU - Lopez-Oliva JG AD - Univ Karlsruhe, Geol Inst 1, D-76131 Karlsruhe, GermanyPrinceton Univ, Dept Geosci, Princeton, NJ 08544, USAUniv Karlsruhe, Inst Mineral & Geochem, D-75128 Karlsruhe, GermanyUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares 67700, NL, MexicoStinnesbeck, W, Univ Karlsruhe, Geol Inst 1, Kaiserstr 12,Postfach 6980, D-76131 Karlsruhe, Germany TI - The Cretaceous-Tertiary (K/T) boundary transition at Coxquihui, state of Veracruz, Mexico: evidence for an early Danian impact event? AB - The Cretaceous-Tertiary (K/T) transition at Coxquihui, State of Veracruz, Mexico, differs from all other Mexican sections by the presence of two spherule-rich layers interbedded with pelagic marls, but lacking the characteristic siliciclastic deposit. A 1-cm-thick spherule layer is located at or near the K/T boundary and contains a small Ir enrichment of 0.2 ng/g (background values < 0.1 ng/g). The precise stratigraphic position of this spherule layer with respect to the K/T boundary is uncertain due to a hiatus that spans from to the lower Parvularugoglobigemia eugubina Zone (Pla) to the upper part of the latest Maastrichtian Plummerita hantkeninoides Zone. A 20-cm-thick marl layer separates the first spherule layer from a 60-cm-thick second spherule layer, which is also within Zone Pla. An Ir enrichment of 0.5 ng/g is present in the overlying 10-cm-thick marl layer. The stratigraphic positions of these two spherule layers and Ir enrichments are strikingly similar to those found at two other localities, Beloc in Haiti and Caribe in Guatemala, and suggest the possibility of an early Danian impact event. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000179111700001 L2 - Cretaceous-Tertiary boundary;spherule-rich deposits;early Danian impact event;NORMAL SEDIMENTARY DEPOSITS; NORTHEASTERN MEXICO; METEORITE IMPACT; MASS EXTINCTIONS; CHANNEL DEPOSITS; GRAVITY FLOWS; PETEN BASIN; HAITI; AGE; STRATIGRAPHY SO - Journal of South American Earth Sciences 2002 ;15(5):497-509 6887 UI - 9982 AU - Stojmenovic I AU - Russell M AU - Vukojevic B AD - Univ Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaUniv Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 04510, DF, MexicoUniv Waterloo, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, CanadaSS8 Networks, Ottawa, ON, CanadaStojmenovic, I, Univ Ottawa, SITE, Ottawa, ON K1N 6N5, Canada TI - Depth first search and location based localized routing and QoS routing in wireless networks AB - In a localized routing algorithm, node A currently holding the message forwards it based on the location of itself, its neighboring nodes and destination. We,propose to use depth first search (DFS) method for routing decisions. Each node A, upon receiving the message for the first time; sorts all its neighbors according to a criterion, such as their distance to destination; and uses that order in DFS algorithm. It is the first localized algorithm that guarantees delivery for (connected) wireless networks modeled by arbitrary graphs; including inaccurate location information. We then propose the first localized QoS routing algorithm for wireless networks. It performs DFS routing algorithm after edges with insufficient bandwidth or insufficient connection time are deleted from the graph, and attempts to minimize hop count. This is also the first paper to apply GPS in QoS routing decisions, and to consider the connection time (estimated lifetime of a link) as a QoS criterion. The average length of measured QoS path in our experiments, obtained by DFS method, was between 1 and 1.34 times longer than the length of QoS path obtained by shortest path algorithm. The overhead is considerably reduced by applying the concept of internal nodes MH - Canada MH - Mexico|Distrito Federal PB - BRATISLAVA: SLOVAK ACADEMY SCIENCES INST INFORMATICS RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 1335-9150 UR - ISI:000178807400004 L2 - wireless networks;routing;quality of service;GUARANTEED DELIVERY SO - Computing and Informatics 2002 ;21(2):149-165 6888 UI - 10758 AU - Stojmenovic I AD - Univ Ottawa, Ottawa, ON K1N 6N5, CanadaUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoStojmenovic, I, Univ Ottawa, Ottawa, ON K1N 6N5, Canada TI - Position-based routing in ad hoc networks AB - The recent availability of small, inexpensive low-power GPS receivers and techniques for finding relative coordinates based on signal strengths, and the need for the design of power-efficient and scalable networks provided justification for applying position-based routing methods in ad hoc networks. A number of such algorithms were developed recently. This tutorial will concentrate on schemes that are loop-free, localized, and follow a single-path strategy, which are desirable characteristics for scalable routing protocols. Routing protocols have two modes: greedy mode (when the forwarding node is able to advance the message toward the destination) and recovery mode (applied until return to greedy mode is possible). We shall discuss them separately. Methods also differ in metrics used (hop count, power, cost, congestion, etc.), and in past traffic memorization at nodes (memoryless or memorizing past traffic). Salient properties to be emphasized in this review are guaranteed delivery, scalability, and robustness MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 30 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0163-6804 UR - ISI:000176703600015 L2 - WIRELESS NETWORKS; GUARANTEED DELIVERY SO - Ieee Communications Magazine 2002 ;40(7):128-134 6889 UI - 11992 AU - Stojmenovic I AU - Seddigh M AU - Zunic J AD - UNAM, IIMAS, DISCA, Mexico City 04510, DF, MexicoUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaNortel Networks, Ottawa, ON, CanadaUniv Wales Coll Cardiff, Dept Comp Sci, Cardiff CF24 3XF, S Glam, WalesStojmenovic, I, UNAM, IIMAS, DISCA, Ciudad Univ,Coyoacan, Mexico City 04510, DF, Mexico TI - Dominating sets and neighbor elimination-based broadcasting algorithms in wireless networks AB - In a multihop wireless network, each node has a transmission radius and is able to send a message to all of its neighbors that are located within the radius. In a broadcasting task, a source node sends the same message to all the nodes in the network. In this paper, we propose to significantly reduce or eliminate the communication overhead of a broadcasting task by applying the concept of localized dominating sets. Their maintenance does not require any communication overhead in addition to maintaining positions of neighboring nodes. Retransmissions by only internal nodes in a dominating set is sufficient for reliable broadcasting. Existing dominating sets are improved by using node degrees instead of their ids as primary keys. We also propose to eliminate neighbors that already received the message and rebroadcast only if the list of neighbors that might need the message is nonempty. A retransmission after negative acknowledgements scheme is also described. The important features of proposed algorithms are their reliability (reaching all nodes in the absence of message collisions), significant rebroadcast savings, and their localized and parameterless behavior. The reduction in communication overhead for broadcasting task is measured experimentally, Dominating sets based broadcasting, enhanced by neighbor elimination scheme and highest degree key, provides reliable broadcast with less than or equal to 53 percent of node retransmissions (on random unit graphs with 100 nodes) for all average degrees d. Critical d is around less than or equal to 48, with 18 percent for less than or equal to 3, less than or equal to 40 percent for d greater than or equal to 10, and < 20 percent for d greater than or equal to 25. The proposed methods are better than existing ones in all considered aspects: reliability, rebroadcast savings, and maintenance communication overhead. In particular, the cluster structure is inefficient for broadcasting because of considerable communication overhead for maintaining the structure and is also inferior in terms of rebroadcast savings MH - Canada MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 70 U4 - Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1045-9219 UR - ISI:000173298100003 L2 - broadcasting;wireless networks;distributed algorithms;dominating sets;clustering;MOBILE SO - Ieee Transactions on Parallel and Distributed Systems 2002 ;13(1):14-25 6890 UI - 9548 AU - Stolik S AU - Tomas SA AU - Ramon-Gallegos E AU - Sanchez F AD - CITMA, Ctr Aplicaciones Tecnol & Desarrollo Nucl, Dept Fis, Playa, Ciudad Habana, CubaIPN, Ctr Ivest Ciencia Aplicada & Technol Avanzada, Mexico City 11500, DF, MexicoIPN, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07300, DF, MexicoStolik, S, CITMA, Ctr Aplicaciones Tecnol & Desarrollo Nucl, Dept Fis, Calle 30 No 502,Miramar, Playa, Ciudad Habana, Cuba TI - Kinetic study of delta-Ala induced porphyrins in mice using photoacoustic and fluorescence spectroscopies AB - The production of delta-aminolevulinic acid (ALA)-induced porphyrins in mice skin and blood was studied by photoacoustic and fluorescence spectroscopies. Mice were intraperitoneally administered with 30 mg/kg of ALA. The abdominal skin was subsequently excised. at specific times within an 8-h interval and its absorption spectrum obtained by photoacoustics. The highest porphyrins concentration in skin, determined from the optical absorption of the Soret band at 410 nm, was found to occur nearly 2 h after ALA administration, but a first peak was also observed at approximately 15 min. Our hypothesis that the first peak represents the porphyrins content in blood vessels within the skin, whereas the second peak corresponds to porphyrins production in skin tissue, was confirmed by analysing the evolution of protoporphyrin IX content in plasma extracted intracardiacally. By finally applying phase resolved photoacoustic spectroscopy, we were able to evaluate the mean depth at which porphyrins are generated. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 1011-1344 UR - ISI:000179892100008 L2 - photoacoustic spectroscopy;protoporphyrin IX;aminolevulinic acid;photodynamic therapy;INDUCED PROTOPORPHYRIN-IX; PHOTODYNAMIC THERAPY; 5-AMINOLEVULINIC ACID; DEPTH-PROFILE; FLUENCE RATES; SKIN; PHARMACOKINETICS; TISSUES; ACCUMULATION; DERIVATIVES SO - Journal of Photochemistry and Photobiology B-Biology 2002 ;68(2-3):117-122 6891 UI - 10632 AU - Stolte WC AU - Ohrwall G AU - Sant'Anna MM AU - Lopez ID AU - Dang LTN AU - Piancastelli MN AU - Lindle DW AD - Univ Nevada, Dept Chem, Las Vegas, NV 89154, USALawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720, USACtr Natl Metrol, Qreretaro 76900, MexicoUniv Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, ItalyStolte, WC, Univ Nevada, Dept Chem, Las Vegas, NV 89154, USA TI - 100% site-selective fragmentation in core-hole-photoexcited methanol by anion-yield spectroscopy AB - Anion-yield spectroscopy is shown to provide the first experimental demonstration of 100% site selectivity in small-molecule photofragmentation processes. In methanol, CH3OH, creation of the anionic OH- fragment occurs only via resonant excitation below the carbon K edge; the fragment is completely absent near the oxygen K edge. This observation and comparison of all anion and cation partial yields confirm the existence of at least two mechanisms for the creation of anions near the carbon K edge MH - Italy MH - Mexico|Queretaro MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 13 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000177016200002 L2 - OXYGEN K-EDGE; RESONANT PHOTOFRAGMENTATION; EXCITATION; MOLECULES; DYNAMICS; CARBON; DECAY SO - Journal of Physics B-Atomic Molecular and Optical Physics 2002 ;35(12):L253-L259 6892 UI - 9986 AU - Stoner KE AU - Quesada M AU - Rosas-Guerrero V AU - Lobo JA AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58009, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaStoner, KE, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Campus Morelia,Apartado Postal 27-3 Xangari, Morelia 58009, Michoacan, Mexico TI - Effects of forest fragmentation on the Colima long-nosed bat (Musonycteris harrisoni) foraging in tropical dry forest of Jalisco, Mexico AB - We determined the effect of forest fragmentation on the nectarivorous Colima long-nosed bat (Musonycteris harrisoni) by observing foraging behavior of this species in disturbed and undisturbed forests on the flowers of Ceiba grandiflora (Bombacaceae). The study was conducted in the area of the Chamela-Cuixmala Biosphere Reserve in Jalisco, Mexico. Musonycteris harrisoni was observed visiting flowers during six nights (88 visits), exclusively in undisturbed forest. This species feeds on the nectar and serves as a pollinator of C. grandiflora MH - Costa Rica MH - Mexico|Michoacan PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 8 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000178898900016 L2 - bat foraging;forest fragmentation;indicator species;Mexico;Musonycteris harrisoni;nectarivore;pollinator;tropical dry forest;GLOSSOPHAGA-SORICINA; FRENCH-GUIANA; RAIN-FOREST; POLLINATION; PHYLLOSTOMIDAE; COMMUNITIES; CHIROPTERA; INDICATORS; ABUNDANCE; DIVERSITY SO - Biotropica 2002 ;34(3):462-467 6893 UI - 9914 AU - Stout B AU - Auger JC AU - Lafait J AD - Fac Sci & Tech Marseille, Ctr St Jerome, Inst Fresnel, CNRS,Unite Mixte Rech Associee 6133, F-13397 Marseille 20, FranceCOMEX, Ctr Invest Polimeros, Tepexpan 55885, MexicoUniv Paris 06, Lab Opt Solides, CNRS, Unite Mixte Rech Associee 7601, F-75252 Paris 05, FranceStout, B, Fac Sci & Tech Marseille, Ctr St Jerome, Inst Fresnel, CNRS,Unite Mixte Rech Associee 6133, Case 262, F-13397 Marseille 20, France TI - A transfer matrix approach to local field calculations in multiple-scattering problems AB - We present a new recursive transfer matrix method for calculating local electromagnetic fields in systems of spheres subject to strong dependent scattering. Local field information is often lost or discarded in recursive transfer matrix approaches. In order to preserve the local field information, and to avoid problems associated with the dimensional cut-off of the translation matrices, we calculate the scatterer-centred transfer matrices. Our technique permits systematic studies of local field effects for all possible incident field directions, and configurations (including orientation averages). Illustrative calculations are presented MH - France MH - Mexico|Estado De Mexico PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 13 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000178885600007 L2 - T-MATRIX; CROSS-SECTIONS; SPHERES SO - Journal of Modern Optics 2002 ;49(13):2129-2152 6894 UI - 10007 AU - Stout B AU - Andraud C AU - Prot D AU - Lafait J AU - Auger JC AU - Stout S AD - Fac Sci & Tech St Jerome, Inst Fresnel, UMR 6133, Ctr St Jerome, F-13397 Marseille 20, FranceFac Sci & Tech St Jerome, Lab Interfaces Phys Med Biol, Ctr St Jerome, F-13397 Marseille, FranceCtr Invest Polimeros, COMEX, Tepexpan 55885 2, Estado Mexico, MexicoUniv Paris 06, Lab Opt Solides, F-75252 Paris 05, FranceStout, B, Fac Sci & Tech St Jerome, Inst Fresnel, UMR 6133, Ctr St Jerome, Case 161, F-13397 Marseille 20, France TI - Complete field descriptions in three-dimensional multiple scattering problems: a transfer-matrix approach AB - We illustrate that a recently formulated recursive transfer matrix method can be used to reliably calculate the electromagnetic fields throughout three-dimensional systems of strongly scattering spheres. and/or coated spheres. The exceptional features of our technique are its particularly stable and reliable numeric Implementations. In this work, we present new self-consistent formulae which permit the verification of the numerical stability at any stage of the calculations, and which ensure the satisfaction of the underlying multiple scattering equations for an arbitrary incident wave MH - France MH - Mexico|Estado De Mexico PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 1464-4258 UR - ISI:000178752000036 L2 - multiple scattering;field fluctuations;Mie scattering;PHOTONIC CRYSTALS; CROSS-SECTIONS SO - Journal of Optics A-Pure and Applied Optics 2002 ;4(5):S182-S187 6895 UI - 8148 AU - Strand V AU - Aranow C AU - Cardiel M AU - Furie R AU - Sherrer Y AU - Tumlin J AU - Wallace DJ AU - Crawford B AD - Stanford Univ, Palo Alto, CA 94304, USASUNY, Brooklyn, NY, USAInst Nacl Ciencias, Mexico City, DF, MexicoNSUH, Manhasset, NY, USACRIA Res, Ft Lauderdale, FL, USAEmory Univ, Sch Med, Atlanta, GA 30322, USAUniv Calif Los Angeles, Los Angeles, CA 90024, USAMapiValue, USA, Boston, MA USA TI - Improvement in health-related quality of life in SLE patients enrolled in a randomized clinical trial comparing LJP394 treatment with placebo MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000178421800254 SO - Arthritis and Rheumatism 2002 ;46(9):S119-S119 6896 UI - 9949 AU - Suarez A AU - Mendez-Rojas MA AU - Pizzano A AD - Univ Sevilla, CSIC, Inst Invest Quim, Seville 41092, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42073, Hidalgo, MexicoPizzano, A, Univ Sevilla, CSIC, Inst Invest Quim, C Americo Vespucio S-N, Seville 41092, Spain TI - Electronic differences between coordinating functionalities of chiral phosphine-phosphites and effects in catalytic enantioselective hydrogenation AB - A convenient synthesis of new chiral phosphine-phosphites (P-OP) has been described. The versatility of the synthetic protocol developed has allowed the preparation of ligands with different phosphine fragments and the choice of the stereogenic element location. Analyses of the values of (1)J(PSe) of the corresponding diselenides are in accord with the expected lower sigma-donor ability of the phosphite fragment, with respect to the phosphine group, and with an increase of phosphine basicity after substitution of phenyl substituents by methyl groups. Inspection of upsilon(CO) values on a series of complexes RhCl(CO)(P-OP) demonstrated a variable pi-aceptor ability of the phosphite group, compensating for the change of basicity of the phosphine functionality, as well as having a rather reduced electron density at the metal center compared with diphosphine analogues. The distinct nature of the phosphorus functionalities has also been evidenced in rhodium-catalyzed enantioselective hydrogenation of methyl Z-alpha-acetamido-cinnamate (MAC). Thus, the coordination mode of the substrate is governed by the chiral ligand, directing the olefinic bond to a cis position with respect to the phosphite group, as demonstrated by NMR studies performed with [Rh(P-OP)(MAC)](+) complexes. In consequence, the phosphite group has a greater impact on the enantioselectivity of the product. However, the optical purity of the process also depends on the nature of the phosphine group, and hence, an appropriate election of both phosphorus functionalities is required for the attainment of excellent enantioselectivities (99% ee) MH - Mexico|Hidalgo MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000178778100009 L2 - NUCLEAR MAGNETIC-RESONANCE; ASYMMETRIC HYDROGENATION; RHODIUM(I) COMPLEXES; DIPHOSPHINE LIGANDS; CARBON-MONOXIDE; HYDROFORMYLATION; SUBSTITUENTS; CHEMISTRY; SYMMETRY; DUPHOS SO - Organometallics 2002 ;21(22):4611-4621 6897 UI - 9733 AU - Sudarsky D AU - Urrutia L AU - Vucetich H AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaSudarsky, D, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - Observational bounds on quantum gravity signals using existing data AB - We consider a new set of effects arising from the quantum gravity corrections to the propagation of fields, associated with fluctuations of the spacetime geometry. Using already existing experimental data, we can put bounds on these effects that are more stringent by several orders of magnitude than those expected to be obtained in astrophysical observations. In fact, these results can already be interpreted as questioning the whole scenario of linear (in l(P)) corrections to the dispersion relations for free fields in Lorentz violating theories MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 53 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000179362700007 L2 - LOCAL LORENTZ INVARIANCE; CPT VIOLATION; SPATIAL ANISOTROPY; STANDARD MODEL; SPACE-TIME; LIMITS; LIGHT; PHENOMENOLOGY; FLUCTUATIONS; PROPAGATION SO - Physical Review Letters 2002 ;89(23): 6898 UI - 10095 AU - Suft G AU - Kretschmer W AU - Boschitz E AU - Meier R AU - Brinkmoller B AU - van den Brandt B AU - Hautle P AU - Konter JA AU - Mango S AU - Mathelitsch L AU - Garcilazo H AU - Gruebler W AD - Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-76131 Karlsruhe, GermanyPaul Scherrer Inst, CH-5232 Villigen, SwitzerlandGraz Univ, Inst Theoret Phys, A-8010 Graz, AustriaInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoETH Honggerberg, CH-8093 Zurich, SwitzerlandSuft, G, Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany TI - Polarization transfer observables in pi d elastic scattering AB - A complete set of pid polarization observables, including polarization transfer, in pid elastic scattering have been measured at backwards scattering angles for two pion energies below and at the Delta(3,3) resonance. Our results for the analyzing powers are in good agreement with the existing world dataset, while polarization transfer observables have not been measured before. The experimental data are compared to relativistic Faddeev calculations and different Virginia Tech Partial-Wave Analysis Facility solutions, in the laboratory as well as in the center-of-mass system MH - Austria MH - Germany MH - Mexico|Distrito Federal MH - Switzerland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000178383900006 L2 - DELTA-N INTERACTION; TENSOR POLARIZATION; T20; EQUATIONS; PHYSICS; SYSTEM; SPIN; IT11 SO - Physical Review C 2002 ;66(3): 6899 UI - 10908 AU - Sui YC AU - Cui BZ AU - Guardian R AU - Acosta DR AU - Martinez L AU - Perez R AD - Inst Mexicano Petr, Coordinac Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Ctr Instrumentos, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Fis, Mexico City 04510, DF, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoSui, YC, Univ Nebraska, Dept Phys & Astron, Brace Lab 205N, POB 880111, Lincoln, NE 68588 USA TI - Growth of carbon nanotubes and nanofibres in porous anodic alumina film AB - By acetylene pyrolysis at 650 and 550degreesC, carbon nanotubes were synthesized successfully in porous alumina templates anodized in sulfuric and/or oxalic acid solution. For templates anodized in oxalic acid followed by boiling in distilled water, thermal decomposition of acetylene at 650degreesC in the pores results in the formation of carbon nanofibres. For templates anodized in sulfuric acid, only carbon nanotubes were formed, even if boiling in water was adopted to process it. This indicates that the modifications of the catalytic effects in acetylene pyrolysis by boiling in water are different to for these two types of templates. All the carbon nanotubes and nanofibres have similar lattice structures under HRTEM examination. No carbon nanotubes or nanofibres can be formed when the chemical vapour deposition temperature decreases to 500degreesC. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000176400500005 L2 - carbon fibers, carbon nanotubes;chemical vapor deposition;transmission electron microscopy;TEMPLATE; MEMBRANES; STORAGE SO - Carbon 2002 ;40(7):1011-1016 6900 UI - 11103 AU - Sui YC AU - Cui BZ AU - Martinez L AU - Perez R AU - Sellmyer DJ AD - Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588, USAUniv Nebraska, Ctr Mat Res & Anal, Lincoln, NE 68588, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoKansas State Univ, Dept Phys, Manhattan, KS 66506, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoSui, YC, Univ Nebraska, Dept Phys & Astron, 116 Brace Lab,POB 880111, Lincoln, NE 68588 USA TI - Pore structure, barrier layer topography and matrix alumina structure of porous anodic alumina film AB - Different anodic voltages and methods were adopted to produce porous anodic alumina Films (PAAF) in an aqueous solution of oxalic acid. Carbon tube growth by chemical vapor deposition (CVD) in the films was used to copy the internal pore structure and was recorded by transmission electron microscopy (TEM) photos. Atomic force microscope (AFM) was employed to obtain the topography of the barrier layer of the corresponding films. When the anodic voltage was 40 V and the two-step method adopted, the barrier layer of the film had domains with highly ordered hexagonal cell distribution, and the corresponding pores were straight. When the anodic voltage increased to 60 V, the barrier layer showed random cell distribution with an obvious difference in cell size and form, and the corresponding pores exhibited multi-branch features. When the anodic voltage increased further to 110 V, the barrier layer also showed a random cell distribution. Additionally, smaller protrusions connected to bigger cells were found, which can be correlated to the formation of branches with smaller diameters. Most of the branches of carbon tubes grown in the film anodized at 110 V have a saw-tooth like feature. X-Ray diffraction analysis shows that all the anodic films are amorphous, regardless of the anodic voltage. However, unoxidized aluminum particles in the film anodized at 110 V was observed by TEM. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 24 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000175610800008 L2 - anodic oxidation;carbon;chemical vapor deposition;nanostructures;TEM;AFM;CARBON NANOTUBES; ARRAYS; NANOWIRES; TEMPLATE; GROWTH; METAL SO - Thin Solid Films 2002 ;406(1-2):64-69 6901 UI - 11819 AU - Sulentic JW AU - Marziani P AU - Zamanov R AU - Bachev R AU - Calvani M AU - Dultzin-Hacyan D AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAOsserv Astron Padova, I-35122 Padua, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSulentic, JW, Univ Alabama, Dept Phys & Astron, Box 870324, Tuscaloosa, AL 35487 USA TI - Average quasar spectra in the context of Eigenvector 1 AB - Recent work has shown that it is possible to systematize quasar spectral diversity in a parameter space called "Eigenvector 1" (E1). We present median active galactic nucleus (AGN) spectra for fixed regions of the E1 (optical) parameter space [FWHM(Hbeta) vs. equivalent width ratio R-Fe II = W(Fe II lambda4570)/W(Hbeta)]. Comparison of the median spectra shows considerable differences. We suggest that an E1-driven approach to median/average spectra emphasizes significant differences between AGNs and offers more insights into AGN physics than a single-population median/average spectrum derived from a large and heterogeneous sample of sources. We find that the Hbeta broad component line profile changes along the E1 sequence in FWHM, centroid shift, and profile asymmetry. While objects with FWHM(Hbeta(BC)) less than or similar to 4000 km s(-1) are well fitted by a Lorentz function, AGNs with FWHM(Hbeta(BC)) greater than or similar to 4000 km s(-1) are better fitted if two broad- line components are used: a "classical" broad-line component and a very broad/redshifted component MH - USA MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000173805100003 L2 - galaxies : active;quasars : emission lines;quasars : general;BROAD-LINE REGION; ACTIVE GALACTIC NUCLEI SO - Astrophysical Journal 2002 ;566(2):L71-L75 6902 UI - 9817 AU - Sun XC AU - Reyes-Gasga J AU - Nava N AU - Sun WS AD - Inst Mexicano Petr, IMP, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Inst Phys, Mexico City 04510, DF, MexicoChinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R ChinaSun, XC, Inst Mexicano Petr, IMP, Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Nanocrystallization process and ferromagnetic properties of amorphous (Fe0.99Mo0.01)(78)Si9B13 ribbons AB - The nanocrystallization process of soft ferromagnetic (Fe0.99Mo0.01)(78) Si9Bi3 ribbons has been studied in detail. Microstructural and ferromagnetic properties are examined by transmission electron microscopy (TEM), X-ray diffraction (XRD), Mossbauer spectroscopy (MS), differential scanning calorimetry (DSC) and magnetization measurements. The Curie and crystallization temperatures are determined to be T-C = 665 K and T-x = 750 K, respectively. The T-x value is in well agreement with DSC measurement results. XRD patterns had shown two metastable phases (Fe23B6Fe3B) which were formed under in situ nanocrystallization process. These metastable phases embedded in the amorphous matrix have a significant effect on magnetic ordering. The ultimate nanocrystalline (NC) phases of alpha-Fe(Mo, Si) and Fe2B at optimum annealing temperature had been observed respectively. It is notable that the magnetization of the amorphous phase decreases more rapidly with increasing temperature than those of NC ferromagnetism, which suggest the presence of the distribution of exchange interaction in the amorphous phase or high metalloid contents. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 1567-1739 UR - ISI:000179320100002 L2 - ferromagnetic properties;nanocrystallization;(Fe0.99Mo0.01)(78)Si9B13 ribbons;magnetization;MAGNETIC-PROPERTIES; CRYSTALLIZATION; FE78B13SI9; BEHAVIOR; ALLOY SO - Current Applied Physics 2002 ;2(3):187-191 6903 UI - 10381 AU - Sun XC AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoSun, XC, Univ Alabama, Ctr Informat Technol, MINT Ctr, Box 870209, Tuscaloosa, AL 35487 USA TI - Microstructure characterization and magnetic properties of nanomaterials AB - The microstructure and superparamagnetic properties of two systems of magnetic nanoparticles are reviewed. A new type of magnetic core-shell Ni-Ce nanocomposite particle (15-50 nm) has been prepared. Typical HREM images and FFT patterns of HREM images showed that many planar defects (nanotwins and stacking faults) exist in the large Ni core zone (10-45 nm). The shell layers (3-5 nm) consist of an innermost Ni-Ce alloy and an outermost NiO oxide. FFT patterns from different regions of typical HREM images show well defined spots characteristic of core-shell nanocomposite materials. Magnetization measurements as a function of magnetic field and temperature showed that superparamagnetic behaviour is exhibited above the average block temperature (T-B = 170 K). This superparamagnetic relaxation was found to be modified by interparticle interactions that depend on the applied field and size distribution. In addition, antiferromagnetic order occurred with a Neel temperature T-N of about 11 K. A spin-flip transition was observed below T-N at a certain applied field. Novel carbon encapsulated Ni nanoparticles assemblies have been synthesized by modified arc-discharge under a methane atmosphere. The presence of carbon encapsulation is confirmed by HR-TEM lattice imaging, and nanodiffraction. The intimate and contiguous carbon fringe around these Ni nanoparticles is good evidence for complete encapsulation by carbon shell layers. Superparamagnetic property studies show that the blocking temperature T-B is around 115 K at 0.1 T applied field. Above T-B, the magnetization M(H, T) can be described by the classical Langevin function L using the relation M/M-s (T = 0) = coth(muH/kT) - kT/muH. The particle size can be inferred from the Langevin fit (particle moment mu), which is a little larger than the HR-TEM observation. It is suggested that these assemblies of carbon encapsulated Ni nanoparticles have typical single-domain, field-dependent superparamagnetic relaxation properties, and this typical superparamagnetic behaviour is consistent with the Stoner-Wohlfarth theory of single-domain particles MH - USA MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177615700003 L2 - PARTICLE-SIZE SO - Molecular Physics 2002 ;100(19):3059-3063 6904 UI - 10383 AU - Sun XC AU - Reyes-Gasga J AU - Dong XL AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Inst Phys, Mexico City, DF, MexicoShenyang Polytech Univ, Shenyang, Peoples R ChinaSun, XC, Univ Alabama, Ctr Mat Informat Technol, Box 870209, Tuscaloosa, AL 35487 USA TI - Formation and microstructure of carbon encapsulated superparamagnetic Co nanoparticles AB - Carbon encapsulated magnetic cobalt nanoparticles have been synthesized by the modified arc-discharge method. Both high resolution transmission electron microscopy (HREM) and powder X-ray diffraction (XRD) profiles reveal the presence of 8-15 nm diameter crystallites coated with 1-3 carbon layers. In particular, HREM images indicate that the intimate and contiguous carbon fringe around those Co nanoparticles is good evidence for complete encapsulation by carbon shell layers. The encapsulated phases are identified as hcp alpha-Co, fcc beta-Co and cobalt carbide (Co3C) nanocrystals using X-ray diffraction (XRD), nano-area electron diffraction (SAED) and energy dispersive X-ray analysis (EDX). However, some fcc beta-Co particles with a significant fraction of stacking faults are observed by HREM and confirmed by means of numerical fast Fourier transform (FFT) of HREM lattice images. The carbon encapsulation formation and growth mechanism are also reviewed MH - USA MH - Mexico|Distrito Federal MH - Peoples R China PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000177615700012 L2 - ARC-DISCHARGE; NANOCAPSULES; METALS SO - Molecular Physics 2002 ;100(19):3147-3150 6905 UI - 10737 AU - Sun XC AU - Nava N AD - Univ Alabama, MINT, Ctr Mat Informat Technol, Tuscaloosa, AL 35487, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoSun, XC, Univ Alabama, MINT, Ctr Mat Informat Technol, POB 870209, Tuscaloosa, AL 35487 USA TI - Microstructure and magnetic properties of Fe(C) and Fe(O) nanoparticles AB - Both Fe(C) and Fe(O) nanoparticles have been successfully synthesized using a modified graphite arc-discharge method. X-ray diffraction (XRD), high-resolution transmission electron microscopy (HREM), and electron diffraction (SAED) analyses indicated that both of these Fe nanoparticles have an average grain size of 15-20 nm and alpha-Fe, gamma-Fe, and Fe3C phases are clearly identified in those Fe(C) particles, while an alpha-Fe and oxide layer (Fe3O4) are revealed in these Fe(O) particles. Mossbauer spectra and hyperfine magnetic fields at room temperature (RT) further confirm their distinct nanophases. At RT, the assemblies of Fe(O) nanoparticles exhibit ferromagnetic properties due to magnetocrystalline anisotropy effects. However, modified superparamagnetic relaxation is observed in the assemblies of Fe(C) nanoparticles MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000176827500019 L2 - FINE PARTICLES; IRON PARTICLES; ARC-DISCHARGE; NANOCAPSULES; MOSSBAUER; FE3C; SIZE; CO SO - Nano Letters 2002 ;2(7):765-769 6906 UI - 10879 AU - Sun XC AU - Dong XL AD - Inst Mexicano Petr, Program Mol Simulat, Mexico City 07730, DF, MexicoShenyang Polytech Univ, Lab Ultrafine Particles, Shenyang, Peoples R ChinaSun, XC, Univ Alabama, MINT Ctr, Tuscaloosa, AL 35487, USA TI - Magnetic properties and microstructure of carbon encapsulated Ni nanoparticles and pure Ni nanoparticles coated with NiO layer AB - Two kinds of nickel nanoparticles-carbon encapsulated Ni nanoparticles Ni(C) and pure Ni nanoparticles coated with NiO layers Ni(O) are successfully prepared. Structural characterizations (HR-TEM, SAED, and XRD) reveal their distinct morphological properties. Magnetization measurements for the assemblies of two kinds of Ni nanoparticles show a larger coercivity and remanence by a deviation between the zero-field-cooled and the field-cooled magnetization below the irreversibility temperature, T-irr,T- for the assemblies of Ni(O) particles. This deviation may be explained as a typical nanocluster-glass behavior (collective behavior) due to ferromagnetic dipole-dipole interaction effects among the assemblies of Ni(O) particles. However, Ni(C) particles exhibit modified superparamagnetic properties above the average blocking temperature of T-B, which is determined to be around 115 K at 1000 Oe. Moreover, a gradual decrease in saturation magnetization is observed, which is attributed to the nanocrystalline nature of the encapsulated particles, coupled with possible carbon solution in Ni nanocrystals. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000176387900019 L2 - magnetic materials;electron microscopy;electron diffraction;X-ray diffraction;magnetic properties;SPIN-GLASS PROPERTIES; NICKEL CLUSTERS; INTERPARTICLE INTERACTIONS; DIPOLE INTERACTIONS; RANDOM ANISOTROPY; PARTICLES; GAMMA-FE2O3; ARC; NANOCOMPOSITES; NANOCAPSULES SO - Materials Research Bulletin 2002 ;37(5):991-1004 6907 UI - 10315 AU - Sussman RA AU - Ishak M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoQueens Univ, Dept Phys, Kingston, ON K7L 3N6, CanadaSussman, RA, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Adiabatic models of the cosmological radiative era AB - We consider a generalization of the Lemaitre-Tolman-Bondi (LTB) solutions by keeping the LTB metric but replacing its dust matter source by an imperfect fluid with anisotropic pressure Pi(a)b. Assuming that total matter-energy density rho is the sum of a rest mass term, rho((m)), plus a radiation rho((r)) = 3p density where p is the isotropic pressure, Einstein's equations are fully integrated without having to place any previous assumption on the form of Pi(ab). Three particular cases of interest are contained: the usual LTB dust solutions (the dust limit), a class of FLRW cosmologies (the homogeneous limit) and of the Vaydia solution (the vacuum limit). Initial conditions are provided in terms of suitable averages and contrast functions of the initial densities of rho((m)), rho((r)) and the 3-dimensional Ricci scalar along an arbitrary initial surface t = t(i). We consider the source of the models as an interactive radiation-matter mixture in local thermal equilibrium that must be consistent with causal Extended Irreversible Thermodynamics (hence Pi(ab) is shear viscosity). Assuming near equilibrium conditions associated with small initial density and curvature contrasts, the evolution of the models is qualitatively similar to that of adiabatic perturbations on a matter plus radiation FLRW background. We show that initial conditions exist that lead to thermodynamically consistent models, but only for the full transport equation of Extended Irreversible Thermodynamics. These interactive mixtures provide a reasonable approximation to a dissipative 'tight coupling' characteristic of radiation-matter mixtures in the radiative pre-decoupling era MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000177908900003 L2 - cosmology;viscosity;irreversible thermodynamics;EINSTEIN-BOLTZMANN EQUATIONS; IDEAL-GAS SOURCES; ANISOTROPIC SOLUTIONS; INHOMOGENEITY; THERMODYNAMICS; QUINTESSENCE; EVOLUTION; UNIVERSE; LIMITS SO - General Relativity and Gravitation 2002 ;34(10):1589-1616 6908 UI - 10810 AU - Suzan-Azpiri H AU - Sanchez-Ramos G AU - Martinez-Avalos JG AU - Villa-Melgarejo S AU - Franco M AD - Univ Autonoma Tamaulipas, Inst Ecol & Alimentos, Cd Victoria 87040, Tamaulipas, MexicoUniv Plymouth, Dept Biol Sci, Plymouth PL4 8AA, Devon, EnglandSuzan-Azpiri, H, Univ Autonoma Queretaro, Fac Ciencias Nat, Cerro Campanas SN, Queretaro 76010, Qro, Mexico TI - Population structure of Pinus nelsoni Shaw, an endemic pinyon pine in Tamaulipas, Mexico AB - Pinus nelsoni Shaw and Pinus cembroides Zucc. are the most important pinyon pine species in the northern region of the Sierra Madre Oriental in Mexico. A demographic study of these two species was conducted between 1996 and 1998. The two species differed in their size structure: P cembroides had a higher proportion of large individuals and seedlings that P nelsoni. The growth rate of the P. nelsoni population projected with the 1996 data indicated moderate positive growth (lambda = 1.083), but the drought of 1997 predicted a long-run annual population decrease of 1% (lambda = 0.990). The forest fires of 1998, which occurred in 30% of the distribution area of these two species, will have long-term population consequences. The importance of this particular event in the development of a management strategy for these species is discussed in light of the results obtained from the previous 2 years. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Queretaro MH - Mexico|Tamaulipas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000176620100017 L2 - allometry;demography;Pinus cembroides;Pinus nelsonii;pinyon pines;population growth;PLANT; CONSERVATION SO - Forest Ecology and Management 2002 ;165(1-3):193-203 6909 UI - 10347 AU - Suzuki K AU - Wang X AU - Weilbacher T AU - Pernestig AK AU - Melefors O AU - Georgellis D AU - Babitzke P AU - Romeo T AD - Emory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322, USAKarolinska Inst, Microbiol & Tumorbiol Ctr, SE-17177 Stockholm, SwedenNatl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Genet Mol, Mexico City 04510, DF, MexicoPenn State Univ, Dept Biochem & Mol Biol, University Pk, PA 16802, USARomeo, T, Emory Univ, Sch Med, Dept Microbiol & Immunol, 3133 Rollins Res Ctr,1510 Clifton Rd,NE, Atlanta, GA 30322 USA TI - Regulatory circuitry of the CsrA/CsrB and BarA/UvrY systems of Escherichia coli AB - The global regulator CsrA (carbon storage regulator) is an RNA binding protein that coordinates central carbon metabolism, activates flagellum biosynthesis and motility, and represses biofilm formation in Escherichia coli. CsrA activity is antagonized by the untranslated RNA CsrB, to which it binds and forms a globular ribonucleoprotein complex. CsrA indirectly activates csrB transcription, in an apparent autoregulatory mechanism. In the present study, we elucidate the intermediate regulatory circuitry of this system. Mutations affecting the BarA/UvrY two-component signal transduction system decreased csrB transcription but did not affect csrA'-'lacZ expression. The uvrYdefect was severalfold more severe than that of barA. Both csrA and urrY were required for optimal barA expression. The latter observation suggests an autoregulatory loop for UvrY. Ectopic expression of uvrY suppressed the csrB-lacZ expression defects caused by uvrY, csrA, or barA mutations; csrA suppressed csrA or barA defects; and barA complemented only the barA mutation. Purified UvrY protein stimulated csrB-lacZ expression approximately sixfold in S-30 transcription-translation reactions, revealing a direct effect of UvrY on csrB transcription. Disruption of sdiA, which encodes a LuxR homologue, decreased the expression of uvrY'-'lacZ and csrB-lacZ fusions but did not affect csrA'-'lacZ. The BarA/UvrY system activated biofilm formation. Ectopic expression of uvrY stimulated biofilm formation by a csrB-null mutant, indicative of a CsrB-independent role for UvrY in biofilm development. Collectively, these results demonstrate that uvrY resides downstream from csrA in a signaling pathway for csrB and that CsrA stimulates UvrY-dependent activation of csrB expression by BarA-dependent and -independent mechanisms MH - USA MH - Mexico|Distrito Federal MH - Sweden PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 57 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000177700900022 L2 - RNA-BINDING PROTEIN; CAROTOVORA SUBSP CAROTOVORA; GENE-EXPRESSION; GLYCOGEN BIOSYNTHESIS; EXTRACELLULAR ENZYMES; SIGNAL-TRANSDUCTION; 2-COMPONENT SYSTEM; PSEUDOMONAS-FLUORESCENS; SALMONELLA-ENTERICA; MOLECULE CSRB SO - Journal of Bacteriology 2002 ;184(18):5130-5140 6910 UI - 10272 AU - Suzuki T AU - Morita R AU - Sugimoto Y AU - Sugawara T AU - Bai DS AU - Alonso ME AU - Medina MT AU - Bailey JN AU - Rasmussen A AU - Ramos-Peek J AU - Cordova S AU - Donnadieu FR AU - Ochoa A AU - Jara-Prado A AU - Inazawa J AU - gado-Escueta AV AU - Yamakawa K AD - Univ Calif Los Angeles, Sch Med, Comprehens Epilepsy Program, Epilepsy Genet Genom Labs, Los Angeles, CA 90073, USAVA GLAHS W Los Angeles, Los Angeles, CA 90073, USANatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoRIKEN, Inst Phys & Chem Res, Brain Sci Inst, Neurogenet Lab, Wako, Saitama 3510198, JapanNatl Autonomous Univ, Tegucigalpa, HondurasUniv Calif Los Angeles, Inst Neuropsychiat, Los Angeles, CA 90024, USATokyo Med & Dent Univ, Med Res Inst, Dept Mol Cytogenet, Tokyo, JapanDelgado-Escueta, AV, Univ Calif Los Angeles, Sch Med, Comprehens Epilepsy Program, Epilepsy Genet Genom Labs, Room 3405 127B,Bldg 500,11301 Wilshire Blvd, Los Angeles, CA 90073 USA TI - Identification and mutational analysis of candidate genes for juvenile myoclonic epilepsy on 6p11-p12: LRRC1, GCLC, KIAA0057 and CLIC5 AB - Juvenile myoclonic epilepsy (JME) is one of the most frequent hereditary epilepsies characterized by myoclonic and tonic-clonic convulsions beginning at 8-20 years of age. Genetic studies have revealed four major chromosomal loci on 6p21.3, 6p11-12 6q24, and 15q14 as candidate regions harboring genes responsible for JME. Previously we reported the region on 6p11-p12 (EJM1), and here we report the identification and mutational analysis of candidate genes for EJM1. One of those is a leucine-rich repeat-containing I (LRRC1) gene that is composed of 14 exons and codes for 524 amino acid residues. In Northern analysis. 7 kb transcripts of LRRC1 gene were detected in multiple tissues, most strongly, in heart, lung. and kidney, Mutation analysis of LRRC1 gene in 20 JME patients from ten families revealed one nucleotide substitution that lead to amino acid exchange (c.577 A > G Ile193Val). This variation, however, did not co-segregate with the disease phenotype. We further performed mutational analyses of CLIC5, KIAA0057 and GCLC genes in or flank tot lie EJM1 region. These analyses did not provide an evidences that these genes are responsible for the JME phenotype. and suggested that these may not be the EJM1 gene. (C) Elsevier Science B.V. All rights reserved MH - USA MH - Honduras MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0920-1211 UR - ISI:000177970100005 L2 - leucine-rich repeat-containing 1 gene;juvenile myoclonic epilepsy;EJM1;POTASSIUM CHANNEL GENE; GENERALIZED EPILEPSY; SUSCEPTIBILITY LOCUS; FEBRILE SEIZURES; CHROMOSOME-6; LINKAGE; PROTEIN; HETEROGENEITY; LOCALIZATION; FAMILIES SO - Epilepsy Research 2002 ;50(3):265-275 6911 UI - 11327 AU - Svirid V AU - Khotiaintsev S AU - Swart PL AD - Natl Autonomous Univ Mexico, Fac Engn, Mexico City 04510, DF, MexicoRand Afrikaans Univ, Fac Engn, ZA-2006 Auckland Pk, Johannesburg, South AfricaSvirid, V, Natl Autonomous Univ Mexico, Fac Engn, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Novel optical fiber refractometric transducer employing hemispherical detection element AB - We present the results of a theoretical numerical analysis of a novel fiber optic refractometric transducer. It consists of a hemispherical glass detection element and a pair of the multimode optical fibers attached symmetrically to the element's flat equatorial plane. The internal reflection of light from the element's spherical surface is sensitive to the refractive index of the surrounding medium. We exploit several internal reflections in series and the focusing of the beam by the element's spherical surface to achieve enhanced sensitivity to the refractive index of the surrounding medium and reduced intrinsic optical loss in the transducer. We present the data on the effect of transducer's parameters on its transmission function. We show that the transducer can operate in a relatively wide range of the refractive index of the surrounding medium (we show this for the interval n = 1.0 to n = 1.45). We also present experimental data confirming our theoretical results. (C) 2002 Society of Photo-optical instrumentation Engineers MH - Mexico|Distrito Federal MH - South Africa PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000175139500009 L2 - fiber optic sensors;refractometry;fluid detection;liquid-level measurement;LOCAL VOID FRACTION; LIQUID-LEVEL SENSOR; 2-PHASE FLOW; PROBE; SYSTEMS SO - Optical Engineering 2002 ;41(4):779-787 6912 UI - 9619 AU - Swart PL AU - Shlyagin MG AU - Chtcherbakov AA AU - Spirin VV AD - RAU, Ctr Optical Commun & Sensors, ZA-2006 Johannesburg, South AfricaCICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoSwart, PL, RAU, Ctr Optical Commun & Sensors, POB 524, ZA-2006 Johannesburg, South Africa TI - Photosensitivity measurement in optical fibre with Bragg grating interferometers AB - A new technique based on two low-finesse fibre Bragg grating Fabry-Perot interferometers to study photosensitivity in optical fibre is presented. Phase evaluation using the Fourier spectra allows precise determination of the evolution of the refractive index with accumulated fluence. Results are given for different germanium/boron codoped fibres and for hydrogen-loaded fibres MH - Mexico|Baja California MH - South Africa PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000179749100013 SO - Electronics Letters 2002 ;38(24):1508-1510 6913 UI - 9479 AU - Taboada-Urtuzuastegui VM AU - Martinez-Ramirez G AU - Abdoun T AD - Natl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoUniv Guadalajara, Inst Earthquake Engn, Guadalajara 44840, Jalisco, MexicoRensselaer Polytech Inst, Dept Civil Engn, Troy, NY 12180, USATaboada-Urtuzuastegui, VM, Natl Autonomous Univ Mexico, Inst Engn, Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - Centrifuge modeling of seismic behavior of a slope in liquefiable soil AB - Two centrifuge tests were designed to improve the understanding the response of liquefied sandy slopes beyond initial liquefaction. A distinctive dilative behavior of the soil was-observed near the slope where static shear stresses are present. The corresponding drops in the piezometric records and simultaneous negative upslope spikes in the acceleration records were measured in the transducer raw data. This dilative response became stronger as the input acceleration increased and tends to limit the downslope accumulation and thus reducing the permanent lateral displacements. Therefore, the maximum permanent displacement was smaller in the model with the larger input motion, because it developed a stronger dilative response. The dilative response was not observed away from the slope, where no static shear stresses are present. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0267-7261 UR - ISI:000180004500036 L2 - centrifuge modeling;liquefaction;lateral spreading;permanent displacement;dilative response;LIQUEFACTION SO - Soil Dynamics and Earthquake Engineering 2002 ;22(9-12):1043-1049 6914 UI - 10387 AU - Tadin M AU - Salas J AU - Moreno L AU - Uyttendaele H AU - Warburton D AU - Christiano AM AD - Columbia Univ, New York, NY, USAUniv Autonoma Nuevo Leon, Med Serv, Monterrey, Mexico TI - Congenital universal hypertrichosis with deafness and dental anomalies inherited as an X-linked trait MH - Mexico|Nuevo Leon MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Dermatology U5 - J;Meeting Abstract AV - English IS - 0022-202X UR - ISI:000177428100519 SO - Journal of Investigative Dermatology 2002 ;119(1):294-294 6915 UI - 11594 AU - Tadmor R AU - Hernandez-Zapata E AU - Chen NH AU - Pincus P AU - Israelachvili JN AD - Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106, USAUniv Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106, USAIsraelachvili, JN, Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA TI - Debye length and double-layer forces in polyelectrolyte solutions AB - We report experimental results and a theoretical analysis of the Debye length in aqueous solutions of nonadsorbing polyelectrolytes. The measurements were done using a surface forces apparatus, in which the normal forces between smooth mica surfaces in aqueous hyaluronic acid (HA) solutions were measured as a function of surface separation (to +/-1 Angstrom). HA is negatively charged and does not adsorb to the negatively charged surface of mica, as was established by optical and viscosity measurements and in agreement with the measured force-distance curves. From these measurements it appears that the multivalent polyelectrolyte is "depleted" from the gap between the surfaces. We use the mean-field Poisson-Boltzmann theory to theoretically predict the effective Debye length and double-layer force under such conditions and compare the predictions with the experimental results. The comparison gives excellent agreement and shows that the effective Debye length is determined solely by the monovalent ions in the solution. Specifically, the effective Debye length K-eff(-1) for the double-layer interaction is determined by an effective ionic concentration given by rootn(s)n(c), where n(s) and n(c) are the bulk negative and positive monovalent ion concentrations, respectively MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000174441800052 L2 - COUNTERION CONDENSATION; SECONDARY STRUCTURE; MOLECULAR-WEIGHT; OSMOTIC-PRESSURE; THIN-FILMS; SURFACES; SHEAR; HYALURONATE; CONFINEMENT; VISCOSITY SO - Macromolecules 2002 ;35(6):2380-2388 6916 UI - 11869 AU - Tago E AU - Saar E AU - Einasto J AU - Einasto M AU - Muller V AU - Andernach H AD - Tartu Astrophys Observ, EE-61602 Toravere, EstoniaAstrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoTago, E, Tartu Astrophys Observ, EE-61602 Toravere, Estonia TI - Optical and X-ray clusters as tracers of the supercluster-void network. II. The spatial correlation function AB - We study the spatial distribution of Abell and X-ray-selected clusters of galaxies from the ROSAT Bright Source Catalog and determine correlation functions for both cluster samples. We find that on small scales the correlation functions depend on the cluster environment: clusters in rich superclusters have a larger correlation length and amplitude than clusters of the whole sample. On large scales the correlation functions depend on the distribution of superclusters, but for both X-ray and Abell clusters they are oscillating with a period of similar to115 h(-1) Mpc, indicating the presence of a local peak in the power spectrum at an effective wavenumber k = 0.055 h Mpc(-1) MH - Estonia MH - Germany MH - Mexico|Guanajuato PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000173767400004 L2 - cosmology : observations;galaxies : clusters : general;large-scale structure of universe;LARGE-SCALE DISTRIBUTION; ALL-SKY SURVEY; TIME-SERIES ANALYSIS; RICH CLUSTERS; PERIODIC SIGNAL; POWER SPECTRUM; GALAXIES; CATALOG; SAMPLE; SEARCH SO - Astronomical Journal 2002 ;123(1):37-50 6917 UI - 10705 AU - Takahashi T AU - Garcia-Osogobio S AU - Valdovinos MA AU - Mass W AU - Jimenez R AU - Jauregui LA AU - Bobadilla J AU - Belmonte C AU - Edelstein PS AU - Utley DS AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Surg, Serv Colon & Rectal Surg, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Gastroenterol, Serv Colon & Rectal Surg, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Anesthesiol, Serv Colon & Rectal Surg, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept GI Endoscopy, Serv Colon & Rectal Surg, Mexico City 14000, DF, MexicoCent Mil Hosp, Serv Colon & Rectal Surg, Mexico City, DF, MexicoStanford Univ, Med Ctr, Dept Surg, Palo Alto, CA 94304, USAVA Palo Alto Hlth Care Syst, Palo Alto, CA, USATakahashi, T, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Surg, Serv Colon & Rectal Surg, Vasco Quiroga 15,Delegac Tlalpan, Mexico City 14000, DF, Mexico TI - Radio-frequency energy delivery to the anal canal for the treatment of fecal incontinence AB - PURPOSE: In this prospective study we investigated the feasibility, safety, and efficacy of radio-frequency energy delivery deep to the mucosa of the anal canal for the treatment of fecal incontinence. METHODS: We studied ten patients with fecal incontinence of varying causes. All patients underwent anoscopy, anorectal manometry, endorectal ultrasound, and pudendal nerve terminal motor latency testing at baseline and six months. The Cleveland Clinic Florida scale for fecal incontinence (Wexner, 0-20), fecal incontinence-related quality of life score, and Short Form 36 were administered at baseline, 1, 2, 3, 6, and 12 months. Using conscious sedation and local anesthesia, we delivered temperature-controlled radio-frequency energy via an anoscopic device with multiple needle electrodes to create thermal lesions deep to the mucosa of the anal canal. RESULTS: Ten females (age, 55.9 +/- 9.2 years; range, 44-74) were enrolled and treated. Median discomfort by visual analog scale (0-10) was 3.8 during and 0.9 two hours after the procedure. Bleeding occurred in four patients (14-21 days after procedure), spontaneous resolution (n = 3) and anoscopic suture ligation (n = 1). At 12 months, the median Wexner score improved from 13.5 to 5 (P < 0.001), with 80 percent of patients considered responders. All parameters in the fecal incontinence-related quality of life were improved (lifestyle (from 2.3 to 3.4), coping (from 1.4 to 2.7), depression (from 2.2 to 3.5), and embarrassment (from 1.3 to 2.8); P < 0.05 for all parameters). Protective pad use was eliminated in five of the seven baseline users. At six months, there was a significant reduction in both initial and maximum tolerable rectal distention volumes. Anoscopy was normal at six months. CONCLUSION: Radio-frequency energy delivery to the anal canal for treatment of fecal incontinence is a new modality that, in this study group, safely improved Wexner and fecal incontinence-related quality of life scores, eliminated protective pad use in most patients, and improved patient quality of life MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 20 U4 - Gastroenterology & Hepatology;Surgery U5 - J;Article AV - English IS - 0012-3706 UR - ISI:000176830000012 L2 - fecal incontinence;radio frequency;anal canal;anorectal manometry;sphincter injury;RADIOFREQUENCY ENERGY; OVERLAPPING SPHINCTEROPLASTY; GASTROESOPHAGEAL JUNCTION; NERVE-STIMULATION; TISSUE REDUCTION; PREVALENCE; QUALITY; PALATE; TRIAL; MODEL SO - Diseases of the Colon & Rectum 2002 ;45(7):915-922 6918 UI - 11079 AU - Takata T AU - El-Omar E AU - Camorlinga M AU - Thompson SA AU - Minohara Y AU - Ernst PB AU - Blaser MJ AD - Vanderbilt Univ, Sch Med, Dept Med, Div Infect Dis, Nashville, TN 37212, USAHosp Pediat Mexico City, Inst Mexicano Seguro Social, Unidad Invest Enfermedades Infecciosas, Mexico City, DF, MexicoUniv Virginia, Dept Internal Med, Charlottesville, VA, USAMed Coll Georgia, Dept Biochem & Mol Biol, Augusta, GA 30912, USAUniv Aberdeen, Dept Med & Therapeut, Aberdeen, ScotlandDept Vet Affairs Med Ctr, New York, NY, USANYU, Sch Med, Dept Med, New York, NY, USAFukuoka Univ, Sch Med, Dept Internal Med 1, Jonan Ku, Fukuoka 8140180, JapanTakata, T, Vanderbilt Univ, Sch Med, Dept Med, Div Infect Dis, Nashville, TN 37212 USA TI - Helicobacter pylori does not require Lewis X or Lewis Y expression to colonize C3H/HeJ mice AB - Helicobacter pylori strains frequently express Lewis X (Le(x)) and/or Le(y) on their cell surfaces as constituents of the O antigens of their lipopolysaccharide molecules. To assess the effect of Le(x) and Le(y) expression on the ability of H. pylori to colonize the mouse stomach and to adhere to epithelial cells, isogenic mutants were created in which fucT1 alone or fucT1 and fucT2, which encode the fucosyl transferases necessary for Le(x) and Le(y) expression, were deleted. C3H/HeJ mice were experimentally challenged with either wild-type 26695 H. pylori or its isogenic mutants. All strains, whether passaged in the laboratory or recovered after mouse passage, colonized the mice well and without consistent differences. During colonization by the mutants, there was no reversion to wild type. Similarly, adherence to AGS and KatoIII cells was unaffected by the mutations. Together, these findings indicate that Le expression is not necessary for mouse gastric colonization or for H. pylori adherence to epithelial cells MH - Japan MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 23 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000175761400043 L2 - GASTRIC EPITHELIAL-CELLS; BLOOD-GROUP ANTIGENS; PHASE VARIATION; MOUSE MODEL; GNOTOBIOTIC PIGLETS; LIPOPOLYSACCHARIDE; HOST; GENE; INFECTION; DISEASE SO - Infection and Immunity 2002 ;70(6):3073-3079 6919 UI - 10088 AU - Takeuchi N AU - Falkenberg G AU - Johnson RL AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Hamburg, Inst Expt Phys 2, D-22761 Hamburg, GermanyTakeuchi, N, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - The low coverage phases of Pb on Ge(001): Scanning tunneling microscopy and first principles AB - Using scanning tunneling microscopy and first principles total energy calculations, we have studied the atomic structure of the low coverage phases of Pb on Ge(001): the (2 x 2) and the c(4 x 8) - alpha reconstructions. Based on the analysis of the experimental bias-dependent STM images and supported by the ab initio pseudopotential density-functional calculations, we present models for each structure. In both cases, there is a coexistence of Ge and Pb dimers. The (2 x 2) phase is formed by asymmetric Pb dimers parallel and in the trenches between the underlying Ge dimers. The Pb coverage is 0.5 ML and it corresponds to the maximum packing density of Pb dimers without breaking Ge dimers. The c(4 x 8) - a reconstruction has a Pb coverage of 0.75 ML and it is characterized by asymmetric Pb dimers forming chains along the [110] direction, However, in this case half of the Ge dimers are broken. The other half remain intact and they are perpendicular to the Pb dimers MH - Germany MH - Mexico|Baja California PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400040 L2 - INDUCED RECONSTRUCTIONS; SURFACE; ADSORPTION; SI(100); SI(001); SUPERSTRUCTURES SO - Surface Review and Letters 2002 ;9(5-6):1809-1814 6920 UI - 10676 AU - Takeuchi N AU - Ulloa SE AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Condensed Matter & Surface Sci Program, Athens, OH 45701, USATakeuchi, N, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - First-principles calculations of the structural and electronic properties of the ScN(001) surface AB - We have studied the structural and electronic properties of the (001) surface of ScN by first-principles total-energy calculations. Since experimental scanning tunneling microscope (STM) images indicate a (1x1) periodicity, we have restricted our calculations to models compatible with this periodicity. Several structures were considered in our study. It was found that for a N-rich surface, the most stable configuration corresponds to a relaxed bulk terminated surface. Electronic properties of this surface are similar to those of the bulk and the surface is semiconductor. In contrast, the most favorable configuration for a Sc-rich surface corresponds to a surface with N vacancies in the first layer. In this case the surface is metallic. Our calculations, and predicted bias dependence of STM images, are in good agreement with experiments MH - Mexico|Baja California MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000176767900082 L2 - GALLIUM NITRIDE; SCN; MICROSTRUCTURE; SEMICONDUCTORS; CRYSTAL; GROWTH; PHASE SO - Physical Review B 2002 ;65(23): 6921 UI - 9396 AU - Talbot JR AU - Goette-Jaime M AU - Cons-Molina F AU - Messina OD AU - Schulz E AD - PAOF, Oceanside, CA, USABaja Calif Univ, Mexicali, Baja California, MexicoUnidad Diagnostico Osteoporosis, Mexicali, Baja California, MexicoLoma Linda Univ, Loma Linda, CA 92350, USACIRO, Buenos Aires, DF, Argentina TI - Prevalence of osteopenia and osteoporosis in Hispanic postmenopausal females MH - Argentina MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000177952800566 SO - Journal of Bone and Mineral Research 2002 ;17():S257-S257 6922 UI - 10437 AU - Tamez-Guerra P AU - McGuire MR AU - Behle RW AU - Shasha BS AU - Pingel RL AD - USDA ARS, Natl Ctr Agr Utilizat Res, Crop Bioprotect Res Unit, Peoria, IL 61604, USAUANL, Fac Ciencias Biol, Dep Microbiol & Inmunol, San Nicolas De Los Garza 66451, NL, MexicoWestern Integrated Cropping Syst Res Unit, Shafter, CA 93263, USAUSDA ARS, Trop Agr Res Stn 2200, Mayaguez, PR 00680, USABehle, RW, USDA ARS, Natl Ctr Agr Utilizat Res, Crop Bioprotect Res Unit, 1815 N Univ St, Peoria, IL 61604 USA TI - Storage stability of Anagrapha falcifera nucleopolyhedrovirus in spray-dried formulations AB - A multiply embedded nucleopolyhedrovirus isolated from Anagrapha falcifera (Kirby) (AfMNPV) can lose insecticidal activity during months of dry storage in ambient room conditions. We tested the spray-dried AfMNPV formulations after storage for up to 1 year at room temperatures for insecticidal activity against neonate Trichoplusia ni (Hubner). Experimental formulations were made using combinations of corn flours, lignin, and sucrose, and were selected based on previous work which demonstrated that these formulations resisted solar degradation in field experiments. Twelve experimental formulations (organized in three groups of four formulations) compared the effect of (1) the ratio of formulation ingredients (lignin and corn flour) to virus concentration, (2) different sources of lignin, or (3) different corn flours and sugar. Based on a single-dose plant assay with these 12 formulations, none of the formulations lost significant activity due to the drying process, when compared with the unformulated wet AfMNPV. Samples of the 12 dried formulations were stored at room (22 +/- 3 degreesC) and refrigerated (4 degreesC) temperatures. Insecticidal activity (LC50) was determined with a dosage-response assay for neonates fed on treated cotton-leaf disks. After 6 (or 9) and 12 months storage, refrigerated samples maintained insecticidal activity better than corresponding samples stored at room temperatures with LC(50)s that averaged 2.0 x 10(6) polyhedral inclusion bodies per milliliter (pibs/ml) for refrigerated samples and 5.4 x 10(6) pibs/ml for samples stored at room temperatures. Compared with unformulated stock virus stored frozen, six formulations stored at room temperature and 10 formulations stored in the refrigerator did not lose significant insecticidal activity after 1 year based on overlapping 90% confidence intervals. Changing the ratio of virus to formulation ingredients did not provide a clear trend over the range of concentrations tested, and may be less important for shelf-life of virus activity compared with formulations made with different ingredients. Two of the four formulations made with different lignins were about 15 times less active after 1 year at room temperature compared with refrigerated samples, indicating that specific formulation ingredients can affect storage stability. Formulations that contained sugar generally maintained activity during storage better than formulations without sugar. Unformulated virus stock maintained insecticidal activity (ranged from 0.20 to 2.5 x 10(6) pibs/ml) better during storage than dried formulations with LC(50)s that ranged from 0.39 to 27 x 10(6) pibs/ml. Unformulated virus stock, which is essentially a suspension of virus occlusion bodies in homogenized insect cadavers, did not lose activity when stored at refrigerated or room temperature. We believe that stability of AfMNPV insecticidal activity during storage as dry formulations is related to the general composition of the formulation and that sugar may play a critical role in maintaining insecticidal activity. (C) 2002 Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000177541800002 L2 - anagrapha falcifera nucleopolyhedrovirus;baculovirus;bioinsecticide;shelf-life;spray dry;formulation;lignin;corn flour;microencapsulation;NUCLEAR POLYHEDROSIS-VIRUS; BACILLUS-THURINGIENSIS; LEPIDOPTERA; PROTECTANTS; NOCTUIDAE; SUCROSE; PESTS SO - Journal of Invertebrate Pathology 2002 ;79(1):7-16 6923 UI - 11687 AU - Tanis PJ AU - Hernandez JFG AU - Deurloo EE AU - Nieweg OE AU - Olmos RAV AU - Rutgers EJ AU - Kroon BB AD - Netherlands Canc Inst, Amsterdam, NetherlandsHosp Oncol, Mexico City, DF, Mexico TI - Probe-guidance improves margins of excision in non-palpable breast cancer MH - Mexico|Distrito Federal MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Surgery U5 - J;Meeting Abstract AV - English IS - 1068-9265 UR - ISI:000173586700133 SO - Annals of Surgical Oncology 2002 ;9(1):S51-S51 6924 UI - 10117 AU - Tapia E AU - Sanchez-Lozada LG AU - Soto V AU - vila-Casado C AU - Franco M AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AD - INC Icnacio Chavez, Mexico City, DF, MexicoUniv Hosp, INBIOMED, Maracaibo, Zulia, Venezuela TI - Mycophenolate mofetil (MMF) prevents arteriolopathy in subtotal renal ablation (5/6Nx) despite persistent arterial hypertension MH - Mexico|Distrito Federal MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000177757501695 SO - Journal of the American Society of Nephrology 2002 ;13():343A-343A 6925 UI - 10360 AU - Taran YA AU - Fischer TP AU - Cienfuegos E AU - Morales P AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131, USANatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoTaran, YA, Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Geochemistry of hydrothermal fluids from an intraplate ocean island: Everman volcano, Socorro Island, Mexico AB - Socorro Island, Mexico, still volcanically active, is an alkaline and peralkaline volcanic island in the eastern Pacific Ocean located on a mid-ocean ridge spreading center that was abandoned at similar to3.5 Ma. Gas and water samples collected on the island in 1999 from the dome fumaroles and hot springs of Everman volcano have been analyzed for major components, H-O-C-S, He and Ar isotopic composition, and noble gas abundances. The boiling-point-temperature steam vents and low-salinity thermal springs discharge Cl-free meteoric water, and are typical surface manifestations of a high-temperature hydrothermal system. High H-2 and CH4 contents (up to 14 and 3.5 vol.% in dry gas, respectively) and an enrichment of CH4 in C-13 (delta(13)C(CH4) = -18 parts per thousand) may suggest that these reduced gases were at least partially produced by the interaction of ultramafic rocks with water inside volcanic edifice due to serpentinization of olivine. The He-3/He-4 ratios (6.0-6.6 R-a) which are lower than the MORB-values, and the high He/Ne ratios (>4000) and He/Ar ratios (up to 4) indicate a contribution of radiogenic He from the oceanic crust or shallow magma chamber like at a low-He-3 hot spot. The maximum of the Ar-40/Ar-36 values (311) is close to the maximum value found in the Socorro volcanic rocks. Noble gas abundances are close to values for the partially degassed air-saturated water, however, with some excess Ne concentrations. An enrichment in Xe-132 (or depletion in 94 Kr) of the least air-contaminated gas sample (He/Ne>4000) relative to air-saturated water can be related to the contribution of noble gases from a non-atmospheric source, probably oceanic crustal component assimilated in a shallow magma reservoir. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000177773800004 L2 - hydrothermal systems;volcanic gases;stable isotopes;He-3/He-4;rare gases;intraplate volcanism;water-rock interaction;MID-ATLANTIC RIDGE; NOBLE-GASES; ISOTOPIC COMPOSITION; CANARY-ISLANDS; PACIFIC-OCEAN; POPPING ROCK; UPPER-MANTLE; SERPENTINIZATION; SYSTEMATICS; ORIGIN SO - Chemical Geology 2002 ;188(1-2):51-63 6926 UI - 10799 AU - Taran YA AU - Inguaggiato S AU - Marin M AU - Yurova LM AD - Univ Nacl Autonoma Mexico, Inst Geophys, Mexico City 04510, DF, MexicoIst Nazl Geofis & Vulcanol, Sez Palermo, Palermo, ItalyInst Oceanog Secretaria Marina, Manzanillo, MexicoInst Volcan Geol & Geochem, Petropavlovsk Kamchatski 683006, RussiaTaran, YA, Univ Nacl Autonoma Mexico, Inst Geophys, Mexico City 04510, DF, Mexico TI - Geochemistry of fluids from submarine hot springs at Punta de Mita, Nayarit, Mexico AB - Thermal springs with a maximum measured temperature of 89degreesC discharge hot water and gas from a depth of 11 m, 400 in offshore of Punta Pantoque, located in the northern part of Bahia de Banderas, near Puerto Vallarta, Mexico. The composition of all water samples collected from the sea bottom is close to that of sea water. Nevertheless, it was possible to estimate the thermal endmember composition by extrapolating the sulfate concentration to zero. This endmember is similar in chemical composition both to waters of the Rio Purificacion and La Tuna thermal springs, located to the South along the Pacific coast of the Jalisco Block, and to pore waters from the deep-sea drilling cores from some accretionary complexes. Gas composition as well as isotopic composition of He and carbon from CO2, CH4 and C2B6 suggests an essentially thermo-biogenic origin for the gas and the presence of a high proportion of radiogenic, crustal helium. Isotopic composition of He in the Punta de Mita gas (0.4 R-a) is the lowest ever measured in Mexican hydrothermal gases. These findings do not support the idea that there exists a direct connection between the Punta de Mita springs and the last volcanic events which occurred in this area at similar to 3 Ma. Rather, this hydrothermal activity is related to deep active faulting and the existence of a deep regional aquifer or local aquifers of connate waters underlying the granites of the Jalisco Block. (C) 2002 Elsevier Science B,V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Colima MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000176603400004 L2 - submarine springs;hydrothermal systems;geothermometry;He-isotopes;formation waters;Jalisco Block;ACCRETIONARY COMPLEX; CHEMISTRY; ORIGIN; ICELAND; HELIUM; ALASKA; OCEAN; GASES; FLOW SO - Journal of Volcanology and Geothermal Research 2002 ;115(3-4):329-338 6927 UI - 9858 AU - Tarango LA AU - Krausman PR AU - Valdez R AU - Kattnig RM AD - Dept Wildlife, Salinas De Hidalgo 78600, San Luis Potosi, MexicoUniv Arizona, Sch Renewable Nat Resources, Tucson, AZ 85721, USANew Mexico State Univ, Dept Fisheries & Wildlife Sci, Las Cruces, NM 88003, USAUniv Arizona, Dept Anim Sci, Tucson, AZ 85721, USATarango, LA, Dept Wildlife, Campus SLP Colegio Postgrad, Salinas De Hidalgo 78600, San Luis Potosi, Mexico TI - Research observation: Desert bighorn sheep diets in northwestern Sonora, Mexico AB - We used microhistological analyses of fresh fecal pellets to determine seasonal diets of desert bighorn sheep (Ovis canadensis mexicana Merriam 1901) in northwestern Sonora, Mexico from April 1997 to December 1998. We identified 41 plant species (22 browse, 10 forbs, 5 grasses, and 4 succulents) in diets of bighorn sheep. We found no differences between diets of males and females, and diet diversity between sexes was similar (P > 0.05). Diet included: browse (45.7-%), forbs (32.0%), succulents (17.8%), and grasses (4.5%). The consumption of succulents was higher during spring, decreased during summer, increased in autumn, and decreased in winter. Consumption of forbs was higher during winter and summer. Globemallow (Sphaeralceae spp.), desert agaves (Agave spp.), range ratany (Krameria parvifolia Benth.), buck-wheatbrush (Eriogonum spp.), foothill palo verde (Cercidium microphyllum [Torrey] Rose & Johnst.), Engelmann prickly pear (Opuntia engelmanii Salm-Dyck), desert ironwood (Olneya tesota A. Gray), and elephant tree (Bursera microphylla A. Gray) were consumed throughout the study. As biologists identify potential release sites for restoration of bighorn sheep in Mexico, studies of diet composition will provide managers with information for successful translocations MH - Mexico|San Luis Potosi MH - USA PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 0022-409X UR - ISI:000179184900002 L2 - Ovis canadensis mexicana;sexual segregation SO - Journal of Range Management 2002 ;55(6):530-534 6928 UI - 11741 AU - Tartaj J AU - Zarate J AU - Tartaj P AU - Lachowski EE AD - CSIC, Inst Ceram & Vidrio, Dept Elect, E-28500 Madrid, SpainUMSNH, Dept Ceram, IIM, Morelia 58060, Michoacan, MexicoUniv York, Dept Phys, York YO10 5DD, N Yorkshire, EnglandUniv Aberdeen, Dept Chem, Aberdeen AB24 3UE, ScotlandTartaj, J, CSIC, Inst Ceram & Vidrio, Dept Elect, E-28500 Madrid, Spain TI - Sol-gel cyclic self-production of alpha-Al2O3 nanoseeds as a convenient route for the low-cost preparation of dense submicrometer size sintered alumina monoliths AB - The excellent properties of alpha-Al2O(3) are extremely dependent on the microstructural characteristics of the ceramic materials, which stress out the importance of designing new processing routes and/or improving the existing ones to reach a rigorous microstructural control on the final material. Here, a novel sol-gel self-production method for alpha-Al2O3 seeds and their application in-situ is demonstrated. The authors show that within an alpha-Al2O3 seed production cycle with input of a low-cost raw material, pseudoboehmite is adequate for the production of high-densified submicronic alpha-Al2O3 monoliths MH - United Kingdom MH - Mexico|Michoacan MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1438-1656 UR - ISI:000174079200012 L2 - BOEHMITE-DERIVED ALUMINA; ALPHA-ALUMINA; MICROSTRUCTURE DEVELOPMENT; TRANSFORMATION; DENSIFICATION; CERAMICS SO - Advanced Engineering Materials 2002 ;4(1-2):17-+ 6929 UI - 10450 AU - Tatsu Y AU - Nishigaki T AU - Darszon A AU - Yumoto N AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62250, Morelos, MexicoNatl Inst Adv Ind Sci & Technol, AIST, Ikeda, Osaka 5638577, JapanYumoto, N, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62250, Morelos, Mexico TI - A caged sperm-activating peptide that has a photocleavable protecting group on the backbone amide AB - A backbone-caged sperm-activating peptide (caged speract) that has a 2-nitrobenzyl group at a backbone amide and a vastly reduced affinity for its receptor (IC50 = 950 nM) was synthesized. UV irradiation of caged speract photocleaves the 2-nitrobenzyl group (tau(1/2)= 26 mus), restoring its affinity (IC50 = 0.67 nM) and ability to increase sperm intracellular pH and Ca2+, as intact speract. Backbone caging of the biological activity was more efficient than side chain caging, which adds a nitrobenzyl group on the peptide side chain. The backbone caging strategy described can be used as a general procedure to cage biologically active peptides, which have no side chain for introduction of a caging group. (C) 2002 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000177481000005 L2 - caged peptide;speract;backbone amide;sperm;SEA-URCHIN EGGS; JELLY COAT; PROTEIN; PHYSIOLOGY; INHIBITOR; ANALOGS SO - Febs Letters 2002 ;525(1-3):20-24 6930 UI - 9608 AU - Tavassoli FA AU - Ortiz-Hidalgo C AU - Baquera-Heredia J AU - Grassi P AD - Armed Forces Inst Pathol, Dept Gynecol & Breast Pathol, Washington, DC 20306, USAABC Hosp, Dept Pathol, Mexico City 01120, DF, MexicoNatl Canc Inst, Dept Pathol, Lab Cytopathol, I-20133 Milan, ItalyTavassoli, FA, Armed Forces Inst Pathol, Dept Gynecol & Breast Pathol, Bldg 54,Rm 1072,6825 16th St NW, Washington, DC 20306 USA TI - The hearts of a breast pathologist, a hematopathologist, and of a cytotechnologist MH - USA MH - Italy MH - Mexico|Distrito Federal PB - GLEN HEAD: WESTMINSTER PUBL INC RP - NOT IN FILE U3 - TC 0 U4 - Pathology;Surgery U5 - J;Article AV - English IS - 1066-8969 UR - ISI:000179838200009 SO - International Journal of Surgical Pathology 2002 ;10(4):295-295 6931 UI - 10666 AU - Taylor HS AU - Jung C AU - Atilgan E AD - Univ So Calif, Dept Chem, Los Angeles, CA 90089, USAUNAM, Ctr Ciencias Fis, Mexico City, DF, Mexico TI - Extraction of the vibrational dynamics from spectra of highly excited polyatomics; DCO MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296801930 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():C91-C91 6932 UI - 11091 AU - Tecante A AU - Doublier JL AD - Inst Natl Rech Agron, F-44316 Nantes, FranceTecante, A, Natl Autonomous Univ Mexico, Dept Alimentos & Biotechnol, Mexico City 04510, DF, Mexico TI - Rheological investigation of the interaction between amylose and kappa-carrageenan AB - By combining theological and turbidity measurements, the interaction and viscoelastic properties of amylose-kappa-carrageenan mixtures were investigated under conditions allowing gelation of the former and gelation or non-gelation of the latter. Amylose concentration was kept constant (1.34 wt%) and carrageenan content was varied from 0.093 to 1.38 wt%. Amylose was dispersed in water at 150degreesC and its gelation was induced by quenching aqueous solutions from 80 to 25degreesC. When desired, carrageenan gelation was also induced by addition of 20 mM KCl. Absorbance and gel-cure profiles were highly dependent on carrageenan concentration and presence of salt. The storage modulus at 15 h depended strongly on carrageenan concentration; for concentrations <0.2%, amylose aggregation occurred rapidly and the rigidity of gels was reinforced as a result of phase separation between amylose and K-carrageenan. Further addition of carrageenan, either without or with KCl, resulted in a maximum G' occurring at about 0.2 and 0.3%, respectively. Beyond such values a sharp decrease was observed suggesting phase inversion with carrageenan forming the continuous phase. Above 0.5%, G' increased steadily showing a predominance of carrageenan gel properties. Results support the existence of at least two different conditions in which amylose and carrageenan form the continuous and disperse phase alternately. (C) 2002 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Applied;Chemistry, Organic;Polymer Science U5 - J;Article AV - English IS - 0144-8617 UR - ISI:000175744500009 L2 - amylose;carrageenan;polysaccharides;rheology;viscoelasticity;gels;CHAIN-LENGTH; GELATION; INCOMPATIBILITY; AGGREGATION; BEHAVIOR; SYSTEMS; GELS SO - Carbohydrate Polymers 2002 ;49(2):177-183 6933 UI - 11691 AU - Tejero ME AU - Ibanez E AU - Farfan F AU - Zarrabe E AU - vila-Rosas H AD - Univ Texas, Austin, TX 78712, USAUniv Autonoma Metropolitana, Mexico City, DF, MexicoUniv Iberoamer, Mexico City, DF, MexicoEND ISSTE, Mexico City, DF, MexicoInst Nacl Perinatol, Mexico City, DF, Mexico TI - Effect of history of gestational disease on anthropometrical and biochemical risk factors for metabolic syndrome MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 0 U4 - Nutrition & Dietetics U5 - J;Meeting Abstract AV - English IS - 0002-9165 UR - ISI:000173542600067 SO - American Journal of Clinical Nutrition 2002 ;75(2):360S-360S 6934 UI - 10800 AU - Tellez-Luis SJ AU - Uresti RM AU - Ramirez JA AU - Vazquez M AD - Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Reynosa 88700, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, E-27002 Lugo, SpainRamirez, JA, Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Apdo Postal 1015, Reynosa 88700, Tamaulipas, Mexico TI - Low-salt restructured fish products using microbial transglutaminase as binding agent AB - Low-salt restructured silver carp products were obtained using mechanically deboned fish meat from filleting wastes of silver carp (Hypophthalmichthys molitrix). The additives used were NaCl at three levels (0 (control), 10 and 20 g kg(-1)) and microbial transglutaminase (MTGase) also at three levels (0 (control), 3 and 6 g kg(-1)). The fish meat was massaged with the additives at <15degreesC for 1 h. The massaged fish paste was then packed into steel stainless tubes and cooked at 40degreesC for 30 min followed by 90degreesC for 15 min. Changes in mechanical properties (texture profile analysis and punch test), solubility, electrophoretic profile and expressible water were evaluated. Hardness was in the range from 26.3 to 52.4N, cohesiveness varied from 0.185 to 0.318 and springiness varied from 0.418 to 0.768. Increasing the amount of both additives improved the mechanical and functional properties of the restructured silver carp products. MTGase activity was associated with a decrease in protein solubility and a decrease in the myosin band (SDS-PAGE). Increasing NaCl decreased the amount of expressible water. The results indicated that it is feasible to obtain low-salt restructured silver carp products with improved mechanical and good functional properties using 3 g kg(-1) MTGase and 10 g kg(-1) NaCl. (C) 2002 Society of Chemical Industry MH - Mexico|Tamaulipas MH - Spain PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 14 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000176610300002 L2 - fish;restructured;transglutaminase;salt;texture;IONIC-STRENGTH; CROSS-LINKING; SURIMI; MYOSIN; AGGREGATION; GELATION; PROTEINS; SARDINE; GELS; MEAT SO - Journal of the Science of Food and Agriculture 2002 ;82(9):953-959 6935 UI - 11397 AU - Tellez-Luis SJ AU - Ramirez JA AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, Spain TI - Mathematical modelling of hemicellulosic sugar production from sorghum straw AB - Xylose is a hemicellulosic sugar that can be used as a carbon and energy source for the growth of microorganisms. The main use of xylose is its bioconversion to xylitol. Sorghum straw is a raw material for xylose production that has not yet been studied. The objective of this work was to study xylose production by hydrolysis of sorghum straw at 122degreesC, using three concentrations of sulphuric acid (2%, 41% and 6%). Kinetic parameters of mathematical models for predicting the concentration of xylose, glucose, acetic acid and furfural were found and optimal conditions selected. These were 2% H2SO4 at 122degreesC for 71 min, which yielded a solution with 18.17 g xylose/1, 6.73 g glucose/1, 0.9 g furfural/1 and 1.51 g acetic acid/1. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 16 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000175036000011 L2 - xylose;sorghum;straw;modelling;hydrolysis;PINUS-PINASTER WOOD; PHAFFIA-RHODOZYMA; HYDROLYSIS; XYLITOL; OPTIMIZATION; TECHNOLOGY; FRACTION; XYLOSE SO - Journal of Food Engineering 2002 ;52(3):285-291 6936 UI - 11502 AU - Tellez-Luis SJ AU - Ramirez JA AU - Vazquez M AD - Univ Santiago Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Dept Quin Analit, E-27002 Lugo, SpainUniv Autonoma Tamaulipas, UAM Reynosta Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoVazquez, M, Univ Santiago Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Dept Quin Analit, Campus Lugo, E-27002 Lugo, Spain TI - Modelling of the hydrolysis of sorghum straw at atmospheric pressure AB - Sorghum straw is a renewable, cheap and widespread resource. The acid hydrolysis of sorghum straw to obtain xylose solutions could be a good alternative for this abundant resource. The H2SO4 hydrolysis of sorghum straw at two different temperatures (80 and 100degreesC) and three H2SO4 concentrations (2, 4 and 6%) using a solid/liquid ratio of 1:10 (w/w) was studied. Kinetic parameters of mathematical models for predicting the concentrations of xylose, glucose, acetic acid and furfural were determined. The activation energy of the release reaction was 183.3 kJ mol(-1) for xylose and 185.8 kJ mol(-1) for glucose. The optimal conditions found were 6% H2SO4 at 100degreesC for 60 min, which allow one to obtain a solution with 18.27g xylose l(-1), 6.788 glucose l(-1), 0.7g furfural l(-1) and 1.35g acetic acid l(-1). It is concluded that this process has potential for utilisation of this renewable lignocellulosic resource. (C) 2002 Society of Chemical Industry MH - Mexico|Tamaulipas MH - Spain PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000174630300003 L2 - hydrolysis;sorghum;xylose;glucose;acetic acid;furfural;modelling;PINUS-PINASTER WOOD; PHAFFIA-RHODOZYMA; HEMICELLULOSIC FRACTION; PRETREATMENT; CAROTENOIDS; TECHNOLOGY; XYLITOL; MEDIA SO - Journal of the Science of Food and Agriculture 2002 ;82(5):505-512 6937 UI - 10591 AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Hernandez-Cadena L AU - Mercado A AU - Smith D AU - Schwartz J AU - Hu H AD - Natl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca, Morelos, MexicoUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Cambridge, MA 02138, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USA TI - Bone lead mobilization during pregnancy and lactation MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600868 SO - Epidemiology 2002 ;13(4):S249-S249 6938 UI - 11690 AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Gonzalez-Cossio T AU - Romleu I AU - Aro A AU - Palazuelos E AU - Schwartz J AU - Hu H AD - Inst Nacl Salud Publ, Ctr Invest & Salud Poblac, Cuernavaca 62508, Morelos, MexicoHarvard Univ, Sch Med, Channing Lab, Brigham & Womens Hosp,Dept Med, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAAmer British Cowdray Hosp, Mexico City, DF, MexicoHernandez-Avila, M, Inst Nacl Salud Publ, Ctr Invest & Salud Poblac, Av Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Impact of breastfeeding on the mobilization of lead from bone AB - To evaluate the hypothesis that lactation stimulates lead release from bone to blood, the authors analyzed. breastfeeding patterns and bone lead concentrations as determinants of blood lead levels among 425 lactating women in Mexico City for 7 months after delivery (1994-1995). The authors measured in vivo patella and tibia lead concentrations at 1 month postpartum using K x-ray fluorescence. Maternal blood samples and questionnaire information were collected at delivery and at 1, 4, and 7 months postpartum. Blood lead was analyzed using graphite furnace atomic absorption spectroscopy. Mean blood lead level at delivery was 8.4 mug/dl (range: 1.8-23.4). Mean cortical and trabecular lead levels were 10.6 mug/g (range: nondetectable to 76.5) and 15.3 mug/g (range: nondetectable to 85.9), respectively, reflecting a population with elevated and diverse past and current lead exposure. The association of bone lead and breastfeeding with blood lead was estimated using generalized estimating equations. Breastfeeding practices and maternal bone lead were important predictors of blood lead level. After adjustment for bone lead and environmental exposure, women who exclusively breastfed their infants had blood lead levels that were increased by 1.4 mug/dl and women who practiced mixed feeding had levels increased by 1.0 mug/dl, in relation to those who had stopped lactation. These results support the hypothesis that lactation is directly related to the amount of lead released from bone MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 16 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000174153800007 L2 - breast feeding;lead;longitudinal studies;X-RAY-FLUORESCENCE; MATERNAL SKELETON; BLOOD; PREGNANCY; LACTATION; MARKER; HEALTH; URINE; WOMEN; DIET SO - American Journal of Epidemiology 2002 ;155(5):420-428 6939 UI - 10549 AU - Tellez-Valencia A AU - vila-Rios S AU - Perez-Montfort R AU - Rodriguez-Romero A AU - de Gomez-Puyou MT AU - Lopez-Calahorra F AU - Gomez-Puyou A AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Quim Organ, E-08028 Barcelona, SpainGomez-Puyou, A, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Apartado Postal 70242, Mexico City 04510, DF, Mexico TI - Highly specific inactivation of triosephosphate isomerase from Trypanosoma cruzi AB - We searched for molecules that selectively inactivate homodimeric triosephosphate isomerase from Trypanosoma cruzi (TcTIM), the parasite that causes Chagas' disease. We found that some benzothiazoles inactivate the enzyme. The most potent were 3-(2-benzothiazolytthio)-propanesulfonic acid. 2-(p-aminophenyl)-6-methylbenzothiazole-7-sulfonic acid, and 2-(2-4(4-aminophenyl)benzothiazole-6-methylbenzothiazole-7-sulfonic acid. Half-maximal inactivation by these compounds was attained with 33, 56, and 8 muM, respectively: in human TIM. half-maximal inactivation required 422 muM. 3.3 mM, and 1.6 mM. In TcTIM, the effect of the benzothiazoles decreased as the concentration of the enzyme was increased. TcTIM has a cysteine (Cys 15) at the dimer interface, whereas human TIM has methionine in that position. In M15C human TIM. the benzothiazole concentrations that caused half-maximal inactivation were much lower than in the wild type. The overall findings Suggest that the benzothiazoles perturb the interactions between the two subunits of TcTIM through a process in which the interface cysteine is central in their deleterious action. (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000177262000031 L2 - triosephosphate isomerase;Trypanosoma cruzi;protein interfaces;benzothiazoles;interface cysteine;PLASMODIUM-FALCIPARUM; CRYSTAL-STRUCTURE; ESCHERICHIA-COLI; BINDING-SITES; INHIBITION; DIMER; PROTEINS; INSIGHTS; ENZYMES; DESIGN SO - Biochemical and Biophysical Research Communications 2002 ;295(4):958-963 6940 UI - 11354 AU - Terrazas A AU - Nowak R AU - Serafin N AU - Ferreira G AU - Levy F AU - Poindron P AD - UNAM, Ctr Neurobiol, Queretaro 76001, MexicoUniv Tours, INRA, CNRS, UMR 6073,Lab Comportement Anim,PRC, F-37380 Nouzilly, FranceUNAM, Ctr Neurobiol, Queretaro 76001, MexicoUniv Tours, Lab Comportement Anim, UMR 6073, INRA,CNRS,PRC, F-37380 Nouzilly, FranceTerrazas, A, UNAM, Ctr Neurobiol, AP 1-141, Queretaro 76001, Mexico TI - Twenty-four-hour-old lambs rely more on maternal behavior than on the learning of individual characteristics to discriminate between their own and an alien mother AB - Lambs can discriminate their own mother from an alien dam on the first day of life, suggesting the recognition of individual physical characteristics of the mother Alternatively, their choice may depend on behavioral differences existing between the ewes because of their maternal selectivity. To clarify this, the ability of 24-hr-old lambs to discriminate between their own and an alien mother, that were either intact and accept only their own lamb at nursing (i.e., selective, n = 19) or anosmic, which nurse indiscriminately alien lambs as well as their own (i.e., nonselective, n = 24), was assessed by a 5-min, two-choice test. With intact dams, lambs spent significantly more time next to their own mother whereas this was not so in the presence of anosmic dams. Furthermore, in the intact group, the vocal activity by their own mother differed from that by the alien dam while this was not so in anosmic ewes. We conclude that 24-hr-old lambs rely more on the behavior of the ewes to select their dam than on their individual physical characteristics. (C) 2002 Wiley Periodicals, Inc MH - France MH - Mexico|Queretaro PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 14 U4 - Developmental Biology;Psychology U5 - J;Article AV - English IS - 0012-1630 UR - ISI:000175174100005 L2 - lamb;mother recognition;anosmia;sheep;hearing;selective bond;NEWBORN LAMBS; MERINO EWES; OLFACTORY RECOGNITION; CLUN FOREST; RAT PUPS; SHEEP; FACE; DETERMINANT; PREFERENCES; RESPONSES SO - Developmental Psychobiology 2002 ;40(4):408-418 6941 UI - 11319 AU - Terrero-Escalante CA AU - Lidsey JE AU - Garcia AA AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv London, Queen Mary, Sch Math Sci, Astron Unit, London E1 4NS, EnglandTerrero-Escalante, CA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Inflation with a constant ratio of scalar and tensor perturbation amplitudes AB - The single scalar field inflationary models that lead to scalar and tensor perturbation spectra with amplitudes varying in direct proportion to one another are reconstructed by solving the Stewart-Lyth inverse problem to next-to-leading order in the slow-roll approximation. The potentials asymptote at high energies to an exponential form, corresponding to power law inflation, but diverge from this model at low energies, indicating that power law inflation is a repellor in this case. This feature implies that a fine-tuning of initial conditions is required if such models are to reproduce the observations. The required initial conditions might be set through the eternal inflation mechanism. If this is the case, it will imply that the spectral indices must be nearly constant, making the underlying model observationally indistinguishable from power law inflation MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000175146900023 L2 - COSMOLOGICAL PARAMETERS; UNIVERSE SCENARIO; CONSTRAINTS; FLUCTUATIONS; SUPERNOVAE; MAXIMA-1 SO - Physical Review D 2002 ;65(8): 6942 UI - 9590 AU - Terrones H AU - Munoz-Navia M AU - Terrones M AU - Hayashi T AU - Kim YA AU - Endo M AU - Munoz-Navia M AU - Dorantes-Davila J AU - Terrones M AU - Grobert N AU - Kamalakaran R AU - Escudero R AU - Dresselhaus MS AD - IPIC&T, San Luis Potosi 78210, SLP, MexicoShinshu Univ, Fac Engn, Nagano 3808553, JapanUASLP, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, SLP, MexicoUniv Sussex, CPES, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Res, D-70174 Stuttgart, GermanyUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 01000, DF, MexicoMIT, Cambridge, MA 02139, USATerrones, H, IPIC&T, Venustiano Carranza 2425-A,Col Los Filtros, San Luis Potosi 78210, SLP, Mexico TI - Graphitic cones in carbon nanofibres AB - High yields of graphitic conical nanofibres (5-70 nm OD; <5 mum in length) are produced by pyrolysing various palladium precursors under an Ar atmosphere at 850-1000degreesC. The fibres exhibit diamond-shaped Pd particles at their tips, which are responsible for the carbon aggregation and its subsequent diffusion. This carbon replication phenomenon on the Pd particles results in the formation of stacked graphene cones, which grow aligned along a common axis, thus creating graphitic nanofibres. The cones within the fibres can be either open (lamp-shade type) or closed. The material has been analysed using sophisticated electron microscopy (HRTEM, SEM, ED) and spectroscopic techniques (Raman, EELS, EDX). Due to the large number of open edges, we envisage that these novel nanofibres may find important applications in the fabrication of field emitters, gas storage devices and composites MH - United Kingdom MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 1058-725X UR - ISI:000179751100006 L2 - nanocones;nanotubes;carbon;palladium;NANOTUBES; PYROLYSIS; ARRAYS SO - Molecular Crystals and Liquid Crystals 2002 ;387():263-274 6943 UI - 9591 AU - Terrones M AU - Grobert N AU - Terrones M AU - Terrones H AU - Ajayan PM AU - Banhart F AU - Blase X AU - Carroll DL AU - Czerw R AU - Foley B AU - Charlier JC AU - Foley B AU - Kamalakaran R AU - Kohler-Redlich PH AU - Ruhle M AU - Seeger T AD - Univ Sussex, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandIPIC&T, San Luis Potosi 78210, SLP, MexicoRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12181, USAUniv Ulm, ZE Elektronenmikroskopie, D-89069 Ulm, GermanyUniv Lyon 1, Dept Phys Mat, F-69622 Villeurbanne, FranceClemson Univ, Dept Phys & Astron, Clemson, SC 29634, USAUniv Louvain, Unit Phys Mat, B-1348 Louvain, BelgiumTerrones, M, Univ Sussex, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, England TI - Doping and connecting carbon nanotubes AB - Self-assembly pyrolytic routes to arrays of aligned CNx nanotubes are described. The electronic properties and the density of states (DOS) of these N doped tubes characterized by scanning tunneling spectroscopy (STS) are also presented. Using tight-binding calculations, we confirm that the presence of N is responsible for introducing donor states near the Fermi Level. Finally, it will be shown that high electron irradiation during annealing at 700-800degreesC, is capable of coalescing single-walled nanotubes (SWNTs). We investigate the merge at the atomic level using tight-binding molecular dynamics (TBMD). Vacancies induce the coalescence via a zipper-like mechanism, responsible of a continuous reorganization of atoms on individual tube lattices within the adjacent tubes. The latter results pave the way to the fabrication of nanotube contacts, nanocircuits and strong 3D composites using irradiation doses under annealing conditions MH - Belgium MH - United Kingdom MH - France MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 1058-725X UR - ISI:000179751100007 L2 - nanotubes;coalescence;doping;electronic;nanocircuits;BORON-NITRIDE NANOTUBES; ELECTRONIC-STRUCTURE; ROUTE; NANOFIBRES; DISULFIDE; PYROLYSIS; GROWTH SO - Molecular Crystals and Liquid Crystals 2002 ;387():275-286 6944 UI - 9847 AU - Terrones M AU - Charlier JC AU - Banhart F AU - Grobert N AU - Terrones H AU - Ajayan PM AD - IPICyT, Adv Mat Dept, San Luis Potosi 78210, SLP, MexicoUniv Catholique Louvain, UPCPM, B-1348 Louvain, BelgiumUniv Ulm, Zent Einrichtung Elektronenmikroskopie, D-89069 Ulm, GermanyMax Planck Inst Met Forschung, D-70569 Stuttgart, GermanyRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USATerrones, M, IPICyT, Adv Mat Dept, Venustiano Carranza 2425-A, San Luis Potosi 78210, SLP, Mexico TI - Towards nanodevice fabrication: Joining and connecting single-walled carbon nanotubes AB - Using state-of-the-art electron microscopy, we demonstrate that high-energy electron irradiation at elevated temperatures (700-800degreesC) results in the molecular merging of adjacent single-walled carbon nanotubes (SWNTs) via a zipper-like mechanism. In order to elucidate this coalescence process, we perform tight-binding molecular dynamics (TBMD) calculations at 1000degreesC. These simulations indicate that only a few vacancies (generated experimentally by knock-on effects on the tube surfaces) between two adjacent tubes of the same chirality trigger tube coalescence via a zipper-like mechanism. We further demonstrate theoretically that two crossing tubes containing a limited number of vacancies (dangling bonds) connect molecularly at 1000degreesC, resulting in the creation of an "X" molecular nanotube junction. Along this line, we propose a method for creating novel nanotube "X" and "Y" junctions, which could be developed in the fabrication of nanotube heterojunctions, robust composites, contacts, nanocircuits and strong 3D composites using SWNTs MH - Belgium MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - TOKYO: MYU K K RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 1344-9931 UR - ISI:000179096500006 L2 - carbon nanotubes;nanojunctions;coalescence;molecular dynamics;HRTEM;JUNCTIONS; GRAPHITE SO - New Diamond and Frontier Carbon Technology 2002 ;12(5):315-323 6945 UI - 10454 AU - Terrones M AU - Grobert N AU - Terrones H AD - Univ Sussex, Sch Chem Phys & Environm Sci, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandIPICyT, Adv Mat Dept, San Luis Potosi 78210, SLP, MexicoMax Planck Inst Met Res, D-70174 Stuttgart, GermanyTerrones, M, Univ Sussex, Sch Chem Phys & Environm Sci, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, England TI - Synthetic routes to nanoscale BxCyNz architectures AB - BxCyNz nanoscale materials, hybrids of h-BN and graphite, have been recently synthesised using various techniques. Here, we present the latest advances in the synthesis and characterisation of B-C-N nanotubes and nanofibres. In particular, we focus on layered BC2N, BN, BC and CNx systems, reviewing their production methods as well as their structural and electronic properties. These materials may find important applications in the fabrication of nanotransistors, robust nanocomposites, conducting polymers, storage components and field emission sources. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 56 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000177484600005 L2 - carbon nanotubes;doped carbons;pyrolysis;transmission electron microscopy;BORON-NITRIDE NANOTUBES; B-C-N; CONTAINING CARBON NANOTUBES; TUBULE FORMS; THIN-FILMS; BAND-GAP; NITROGEN; GROWTH; NANOFIBERS; PYROLYSIS SO - Carbon 2002 ;40(10):1665-1684 6946 UI - 10561 AU - Terrones M AU - Banhart F AU - Grobert N AU - Charlier JC AU - Terrones H AU - Ajayan PM AD - Univ Ulm, Zent Einrichtung Elektronenmikroskopie, D-89069 Ulm, GermanyIPICyT, Dept Adv Mat, San Luis Potosi 78210, San Luis Potosi, MexicoUniv Sussex, Sussex Nanosci & Nanotechnol Ctr, Brighton BN1 9QJ, E Sussex, EnglandUniv Catholique Louvain, PCPM, B-1348 Louvain, BelgiumCERMIN, B-1348 Louvain, BelgiumRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USABanhart, F, Univ Ulm, Zent Einrichtung Elektronenmikroskopie, D-89069 Ulm, Germany TI - Molecular junctions by joining single-walled carbon nanotubes AB - Crossing single-walled carbon nanotubes can be joined by electron beam welding to form molecular junctions. Stable junctions of various geometries are created in situ in a transmission electron microscope. Electron beam exposure at high temperatures induces structural defects which promote the joining of tubes via cross-linking of dangling bonds. The observations are supported by molecular dynamics simulations which show that the creation of vacancies and interstitials induces the formation of junctions involving seven- or eight-membered carbon rings at the surface between the tubes MH - Belgium MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 155 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000177200100021 SO - Physical Review Letters 2002 ;89(7): 6947 UI - 10921 AU - Terrones M AU - Terrones G AU - Terrones H AD - IPICYT Potosi Inst Sci & Technol Res, Adv Mat Dept, San Luis Potosi 78210, MexicoPacific NW Natl Lab, Proc Sci & Engn Dept, Richland, WA 99352, USATerrones, M, IPICYT Potosi Inst Sci & Technol Res, Adv Mat Dept, Venustiao Carranza 2425 A, San Luis Potosi 78210, Mexico TI - Structure, chirality, and formation of giant icosahedral fullerenes and spherical graphitic onions AB - We describe the topology, structure, and stability of giant fullerenes exhibiting various symmetries (I, I-h, D-2h, T). Our results demonstrate that it is possible to create two new families of nested "chiral" icosahedral (I) fullerenes namely C-260@C-560@C-980@C-1520@, ...,and C-140@C-380@C-740@C-1220@ ..., which exhibit interlayer separations of ca. 3.4 Angstrom. These chiral fullerenes are thought to possess metalliclike conduction properties. We discuss in detail the transformation of polyhedral graphitic particles into quasispherical nested giant fullerenes by reorganization of carbon atoms, which result in the formation of additional pentagonal and heptagonal carbon rings. These "spherical" structures are metastable and we believe they could be formed under extreme conditions, such as those produced by high-energy electron irradiation. There is circumstantial experimental evidence for the presence of heptagonal rings within these spherical fullerenes MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Crystallography U5 - J;Article AV - English IS - 1040-0400 UR - ISI:000176189800019 L2 - fullerenes;spherical onions;nested fullerenes;stability and symmetry;WALLED CARBON NANOTUBES; FORMATION MECHANISM; CONCENTRIC-SHELL; PARTICLES; SINGLE; C-60; IRRADIATION; DIAMOND; GROWTH; CURVATURE SO - Structural Chemistry 2002 ;13(3-4):373-384 6948 UI - 11534 AU - Terrones M AU - Ajayan PM AU - Banhart F AU - Blase X AU - Carroll DL AU - Charlier JC AU - Czerw R AU - Foley B AU - Grobert N AU - Kamalakaran R AU - Kohler-Redlich P AU - Ruhle M AU - Seeger T AU - Terrones H AD - Univ Sussex, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandIPICyT, San Luis Potosi 78210, SLP, MexicoRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USAUniv Ulm, ZE Elektronenmikroskopie, D-89069 Ulm, GermanyUniv Lyon 1, Dept Phys Mat, F-69622 Villeurbanne, FranceClemson Univ, Dept Phys & Astron, Clemson, SC 29634, USAUniv Louvain, PCPM, Unit Phys Mat, B-1348 Louvain, BelgiumTrinity Coll Dublin, Dept Phys, Dublin 2, IrelandMax Planck Inst Met Res, D-70174 Stuttgart, GermanyTerrones, M, Univ Sussex, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, England TI - N-doping and coalescence of carbon nanotubes: synthesis and electronic properties AB - Self-assembly pyrolytic routes to large arrays (< 2.5 cm(2)) of aligned CNx nanotubes (15-80 nm OD and < 100 mum in length) are presented. The method involves the thermolysis of ferrocene/melamine mixtures (5 : 95) at 900-1000degreesC in the presence of Ar. Electron energy loss spectroscopy (EELS) reveals that the N content varies from 2%-10%, and can be bonded to C in two different fashions (double-bonded and triple-bonded nitrogen). The electronic densities of states (DOS) of these CNx nanotubes, using scanning tunneling spectroscopy (STS), are presented. The doped nanotubes exhibit strong features in the conduction band close to the Fermi level (0.18 eV). Using tight-binding and ab initio calculations, we confirm that pyridine-like (double-bonded) N is responsible for introducing donor states close to the Fermi Level. These electron-rich structures are the first example of n-type nanotubes. Finally, it will be shown that moderate electron irradiation at 700-800 degreesC is capable of coalescing single-walled nanotubes (SWNTs). The process has also been studied using tight-binding molecular dynamics (TBMD). Vacancies induce the coalescence via a zipper-like mechanism, which has also been observed experimentally. These vacancies trigger the organization of atoms on the tube lattices within adjacent tubes. These results pave the way to the fabrication of nanotube heterojunctions, robust composites, contacts, nanocircuits and strong 3D composites using N-doped tubes as well as SWNTs MH - Belgium MH - United Kingdom MH - France MH - Germany MH - Ireland MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 80 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000174611600007 L2 - BORON-NITRIDE NANOTUBES; B-C-N; GRAPHITIC CARBON; NITROGEN; GROWTH; ROUTE; BC2N; HETEROJUNCTIONS; NANOFIBRES; DISULFIDE SO - Applied Physics A-Materials Science & Processing 2002 ;74(3):355-361 6949 UI - 10709 AU - Tesoro E AU - Leon Y AU - Hernandez R AU - De la Concha A AU - Kreschmer R AU - Aguilar A AD - Hosp Pediat Mexico City, Ctr Med Nacl Siglo XXI, IMSS, Unidad Invest Inmunol Med, Mexico City, DF, MexicoInst Nacl Nutr Salvador Zubiran, Unidad Invest Expt & Biot, Mexico City 14000, DF, MexicoTexas A&M Univ, Agr Expt Stn, Dept Pathobiol, San Angelo, TX, USA TI - Cross-reactivity between caprine arthritis-encephalitis virus (CAEV) and type 1 human immunodeficiency virus (HIV-1) MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Immunology U5 - J;Meeting Abstract AV - English IS - 1521-6616 UR - ISI:000176439600391 SO - Clinical Immunology 2002 ;103(3):S129-S129 6950 UI - 12117 AU - Thadhani R AU - Wolf M AU - West ML AU - Tonelli M AU - Ruthazer R AU - Pastores GM AU - Obrador GT AD - Harvard Univ, Sch Med, Massachusetts Gen Hosp, Renal Unit, Boston, MA 02114, USADalhousie Univ, Dept Med, Div Nephrol, Halifax, NS, CanadaTufts Univ New England Med Ctr, Div Clin Care Res, Boston, MA 02111, USANYU, Sch Med, Dept Neurol & Pediat, Neurogenet Program, New York, NY, USATufts Univ New England Med Ctr, Div Nephrol, Boston, MA 02111, USAPanamaricana Univ, Sch Med, Mexico City, DF, MexicoThadhani, R, Harvard Univ, Sch Med, Massachusetts Gen Hosp, Renal Unit, Founders 036,55 Fruit St, Boston, MA 02114 USA TI - Patients with Fabry disease on dialysis in the United States AB - Background. Fabry disease results from an X-linked deficiency of lysosomal alpha-galactosidase A and is a rare cause of end-stage renal disease, Little is known about the characteristics of patients with Fabry disease that initiate dialysis in the United States, although data from Europe suggests these individuals have a poor survival. Methods. Using the United States Renal Disease System database, we first studied in detail 42 Fabry patients who initiated dialysis between April 1995 (following the introduction of the new detailed HCFA 2728 form) and July 1998. To examine crude survival in a larger cohort, 95 Fabry patients were studied who initiated dialysis between 1985 and 1993, similar to the European Registry. Diabetic and non-diabetic controls matched by age, gender, race, year of dialysis initiation, and initial dialysis modality were examined for comparison. Results. During the years 1995 to 1998, the mean age of Fabry patients that initiated dialysis was 42 years, 83% were Caucasian, and 10% were African American. Despite the X-linked inheritance of Fabry disease, 12% of Fabry patients on dialysis were female. At initiation of dialysis mean serum albumin and creatinine were significantly higher and mean body mass index was significantly lower among Fabry patients, but mean glomerular filtration rate was similar to controls. Fabry patients tended to have a lower three-year survival compared to non-diabetic controls, but the results were not significantly different. In a larger cohort of Fabry patients who initiated dialysis between 1985 and 1993, the three-year survival of Fabry patients was significantly lower than non-diabetic controls: 63% (95% CI, 50 to 75%) versus 74% (95% CI, 67 to 80%; P = 0.03). Conclusion. End-stage renal disease is associated with Significant morbidity and mortality among patients with Fabry disease. Recent evidence that progression of Fabry disease may be attenuated by enzyme replacement therapy necessitates increased awareness of Fabry disease and its comorbidities MH - Canada MH - USA MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 63 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000172904900029 L2 - end-stage renal disease;X-linked inheritance;enzyme replacement therapy;lysosomal alpha-galactosidase A;STAGE RENAL-DISEASE; PREVALENCE; DISORDERS; THERAPY; FAILURE; GENE SO - Kidney International 2002 ;61(1):249-255 6951 UI - 9921 AU - Therrell MD AU - Stahle DW AU - Cleaveland MK AU - Villanueva-Diaz J AD - Univ Arkansas, Dept Geosci, Tree Ring Lab, Fayetteville, AR 72701, USAInst Nacl Invest Forestales & Agropecuarias, Torreon 27130, Coahuila, MexicoTherrell, MD, Univ Arkansas, Dept Geosci, Tree Ring Lab, Ozark Hall 113, Fayetteville, AR 72701 USA TI - Warm season tree growth and precipitation over Mexico AB - [1] We have developed a network of 18 new tree ring chronologies to examine the history of warm season tree growth over Mexico from 1780 to 1992. The chronologies include Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) and Montezuma pine (Pinus montezumae Lamb.) latewood width, and Montezuma bald cypress (Taxodium mucronatum Ten.) total ring width. They are located in southwestern Texas, the Sierra Madre Oriental, Sierra Madre Occidental, and southern Mexico as far south as Oaxaca. Seven of these chronologies are among the first precipitation sensitive tree ring records from the American tropics. Principal component analysis of the chronologies indicates that the primary modes of tree growth variability are divided north and south by the Tropic of Cancer. The tree ring data in northern Mexico (PC1) are most sensitive to June-August rainfall, while the data from southern Mexico (PC2) are sensitive to rainfall in April-June. We find that the mode of tree growth variability over southern Mexico is significantly correlated with the onset of the North American Monsoon. Anomalies in monsoon onset, spring precipitation, and tree growth in southern Mexico all tend to be followed by precipitation anomalies of opposite sign later in the summer over most of central Mexico MH - USA MH - Mexico|Coahuila PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000178977300024 L2 - drought;latewood;Mexico;monsoon;tree rings;NORTH-AMERICAN MONSOON; INTERANNUAL VARIABILITY; UNITED-STATES; RECONSTRUCTION; RAINFALL; DROUGHT; REGIME SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D14): 6952 UI - 9850 AU - Thomas KA AU - Manimohan P AU - Guzman G AU - Tapia F AU - Ramirez-Guillen F AD - Univ Calicut, Dept Bot, Calicut 673635, Kerala, IndiaInst Ecol, Xalapa 91000, Veracruz, MexicoThomas, KA, Univ Calicut, Dept Bot, Calicut 673635, Kerala, India TI - The genus Psilocybe in Kerala State, India AB - Eight species of Psilocybe from Kerala State, India, are considered. Psilocybe keralensis sp. nov. and P. wayanadensis sp. nov. are described. Psilocybe pegleriana, P. subaeruginascens, and P. subcubensis are recorded for the first time from India. Psilocybe argentina, P. coprophila, and P. cubensis are new records for Kerala MH - India MH - Mexico|Veracruz PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 6 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000179226600014 L2 - Basidiomycota;Agaricales;Strophariaceae;new species;new records SO - Mycotaxon 2002 ;83():195-207 6953 UI - 11925 AU - Thompson D AU - Szabo CI AU - Mangion J AU - Oldenburg RA AU - Odefrey F AU - Seal S AU - Barfoot R AU - Kroeze-Jansema K AU - Teare D AU - Rahman N AU - Renard H AU - Mann G AU - Hopper JL AU - Buys SS AU - Andrulis IL AU - Senie R AU - Daly MB AU - West D AU - Ostrander EA AU - Offit K AU - Peretz T AU - Osorio A AU - Benitez J AU - Nathanson KL AU - Sinilnikova OM AU - Olah E AU - Bignon YJ AU - Ruiz P AU - Badzioch MD AU - Vasen HFA AU - Futreal AP AU - Phelan CM AU - Narod SA AU - Lynch HT AU - Ponder BAJ AU - Eeles RA AU - Meijers-Heijboer H AU - Stoppa-Lyonnet D AU - Couch FJ AU - Eccles DM AU - Evans DG AU - Chang-Claude J AU - Lenoir G AU - Weber BL AU - Devilee P AU - Easton DF AU - Goldgar DE AU - Stratton MR AD - Int Agcy Res Canc, Unit Genet Epidemiol, F-69008 Lyon, FranceUniv Cambridge, CRC, Genet Epidemiol Unit, Strangeways Res Lab, Cambridge CB1 4RN, EnglandInst Canc Res, Sect Canc Genet, Sutton SM2 5NG, Surrey, EnglandLeiden Univ, Dept Human Genet, NL-2333 AA Leiden, NetherlandsLeiden Univ, Dept Pathol, NL-2333 AA Leiden, NetherlandsUniv Sydney, Westmead Inst Canc Res, Millennium Inst, Westmead, NSW 2145, AustraliaUniv Melbourne, Ctr Genet Epidemiol, Melbourne, Vic 3002, AustraliaUniv Utah, Dept Hematol Oncol, Salt Lake City, UT 84132, USAMt Sinai Hosp, Samuel Lunenfeld Res Inst, Fred A Litwin Ctr Canc Genet, Toronto, ON M5G 1X5, CanadaColumbia Univ, Mailman Sch Publ Hlth, New York, NY 10032, USAFox Chase Canc Ctr, Philadelphia, PA 19012, USANo Calif Canc Ctr, Union City, CA 94587, USAFred Hutchinson Canc Res Ctr, Div Clin Res, Seattle, WA 98109, USAMem Sloan Kettering Canc Ctr, Clin Genet Serv, Dept Med, New York, NY 10021, USAHebrew Univ Jerusalem, Sharett Inst Oncol, Hadassah Med Ctr, IL-91120 Jerusalem, IsraelCtr Nacl Invest Oncol, Dept Genet Humana, Madrid 28220, SpainUniv Penn, Abramson Family Canc Res Inst, Philadelphia, PA 19104, USANatl Canc Inst, Div Mol Biol, H-1122 Budapest, HungaryCtr Jean Perrin, Unite Oncogenet, F-63011 Clermont Ferrand, FranceCtr Jean Perrin, INSERM, U9502, CRI, F-63011 Clermont Ferrand, FranceCtr Jean Perrin, INSERM, EA 2145, F-63011 Clermont Ferrand, FranceUniv Autonoma Nuevo Leon, Dept Bioquim, Fac Med, Monterrey 64460, MexicoSanger Ctr, Canc Genome Project, Cambridge CB10 1SA, EnglandWomens Coll Hosp, Ctr Res Womens Hlth, Toronto, ON M5S 1N9, CanadaCreighton Univ, Dept Prevent Med, Omaha, NE 68178, USAUniv Cambridge, Canc Res Campaign, Dept Oncol, Cambridge Inst Med Res, Cambridge CB2 2XZ, EnglandRoyal Marsden NHS Trust, Sutton SM2 5PT, Surrey, EnglandErasmus Univ, Dept Clin Genet, NL-3016 AH Rotterdam, NetherlandsInst Curie, Unite Genet Oncol, F-75248 Paris, FranceINSERM, U434, F-75248 Paris, FranceMayo Clin & Mayo Fdn, Dept Lab Med & Pathol, Rochester, MN 55905, USAPrincess Anne Hosp, Wessex Clin Genet Serv, Southampton SO16 5YA, Hants, EnglandSt Marys Hosp, Reg Genet Serv, Manchester M13 0JH, Lancs, EnglandDeutsch Krebsforschungszentrum, Div Epidemiol, D-69120 Heidelberg, GermanyGoldgar, DE, Int Agcy Res Canc, Unit Genet Epidemiol, 150 Cours Albert Thomas, F-69008 Lyon, France TI - Evaluation of linkage of breast cancer to the putative BRCA3 locus on chromosome 13q21 in 128 multiple case families from the Breast Cancer Linkage Consortium AB - The known susceptibility genes for breast cancer, including BRCA1 and BRCA2, only account for a minority of the familial aggregation of the disease. A recent study of 77 multiple case breast cancer families from Scandinavia found evidence of linkage between the disease and polymorphic markers on chromosome 13q21. We have evaluated the contribution of this candidate "BRCA3" locus to breast cancer susceptibility in 128 high-risk breast cancer families of Western European ancestry with no identified BRCA1 or BRCA2 mutations. No evidence of linkage was found. The estimated proportion (a) of families linked to a susceptibility locus at D13S1308, the location estimated by Kainu et al. [(2000) Proc. Natl. Acad. Sci. USA 97, 9603-9608], was 0 (upper 95% confidence limit 0.13). Adjustment for possible bias due to selection of families on the basis of linkage evidence at BRCA2 did not materially alter this result (alpha = 0, upper 95% confidence limit 0.18). The proportion of linked families reported by Kainu et al. (0.65) is excluded with a high degree of confidence in our dataset [heterogeneity logarithm of odds (HLOD) at alpha = 0.65 was -11.0]. We conclude that, if a susceptibility gene does exist at this locus, it can only account for a small proportion of non-BRCA1/2 families with multiple cases of early-onset breast cancer MH - Australia MH - Canada MH - United Kingdom MH - France MH - Germany MH - Hungary MH - Israel MH - Mexico|Nuevo Leon MH - Netherlands MH - Spain MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 45 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000173450100053 L2 - SUSCEPTIBILITY GENE; MUTATIONS; 8P12-P22 SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(2):827-831 6954 UI - 10663 AU - Thomson LM AU - Hall MB AD - Univ Autonoma San Luis Postosi, Fac Ciencias Quim, San Luis Potosi 78280, MexicoTexas A&M Univ, Dept Chem, College Stn, TX 77843, USA TI - Modelling the peroxide intermediate of the enzyme MMO MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000176296800144 SO - Abstracts of Papers of the American Chemical Society 2002 ;223():A27-A27 6955 UI - 10691 AU - Tiburcio J AU - Jones WD AU - Loeb SJ AU - Torrens H AD - Natl Autonomous Univ Mexico, Fac Quim, Div Estudios Posgrado, Mexico City 04510, DF, MexicoUniv Rochester, Dept Chem, Rochester, NY 14627, USAUniv Windsor, Dept Chem & Biochem, Windsor, ON N9B 3P4, CanadaLoeb, SJ, Natl Autonomous Univ Mexico, Fac Quim, Div Estudios Posgrado, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Conformational behavior and coordination chemistry of 2,11-dithia[3.3]orthocyclophane with platinum group metals AB - The compound 2,11-dithia[3.3]orthocyclophane (L) is a mesocyclic dithioether that can act as a bidentate ligand in different conformations. In the ionic heteroleptic complexes [PtL(eta(4)-cod)][CF3SO3](2) (1), [RhL(eta(4)-cod)][CF3SO3] (2), and [IrL(eta(4)-cod)][CF3SO3] (3) (cod = 1,5-cyclooctadiene), L is coordinated in the anti I conformation both in solution and in the solid state, as revealed by an X-ray diffraction study of complex 1. However, in complexes [PdL(PPh3)(2)][SO3CF3](2) (4) and [PtL(PPh3)(2)][SO3CF3](2) (5), L exhibits two different conformations: anti I and anti II in a 40:60 ratio, as observed by H-1 and P-31 NMR spectroscopy, with no exchange up to 90 degreesC. The homoleptic complexes [PdL2][SO3CF3](2) (6) and [PtL2][SO3CF3](2) (7), with two ligands bound to the metal, display two isomers in solution, one of them with L in conformations anti I-anti II and the other with conformations anti II-anti II with a 75:25 ratio. The X-ray structure of 6 showed only the presence of the anti II-anti II isomer in the solid state. All complexes were synthesized by the reaction of a suitable chloride complex with 2 equiv of silver triflate and 1 equiv of L MH - Canada MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000176824100029 L2 - CROWN THIOETHER CHEMISTRY; SIMULTANEOUS FIRST-SPHERE; 2ND-SPHERE COORDINATION; 2,5,8-TRITHIA<9>-O-CYCLOPHANE TT<9>OC; SIMULTANEOUS 1ST-SPHERE; HYDRAZINIUM ION; ETHER COMPLEXES; SOLID-STATE; LIGANDS; CYCLOPHANE SO - Inorganic Chemistry 2002 ;41(14):3779-3785 6956 UI - 9691 AU - Tichit D AU - Rolland A AU - Prinetto F AU - Fetter G AU - Martinez-Ortiz MD AU - Valenzuela MA AU - Bosch P AD - ENSCM, CNRS, UMR 5618, Lab Mat Catalyt & Catalyse Chim Organ, F-34296 Montpellier 5, FranceUniv Turin, Dipartimento Chim, IFM, I-10125 Turin, ItalyBenemerita Univ Autonoma Puebla, Fac Ciencias Quim, Puebla 72570, MexicoUPALM, Inst Politecn Nacl, ESIQIE, SEPI, Mexico City 07738, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoTichit, D, ENSCM, CNRS, UMR 5618, Lab Mat Catalyt & Catalyse Chim Organ, 8 Rue Ecole Normal, F-34296 Montpellier 5, France TI - Comparison of the structural and acid-base properties of Ga- and Al-containing layered double hydroxides obtained by microwave irradiation and conventional ageing of synthesis gels AB - Structural and acid-base properties of Mg/Al and Mg/Ga layered double hydroxides (LDH's) obtained by microwave irradiation of the co-precipitated gels have been investigated and compared to those of samples conventionally aged by prolonged hydrothermal treatment of the gels. Similar crystallinities and chemical compositions were obtained whatever the synthesis method used. Besides, all samples, and remarkably the Ga-containing LDH's with a molar ratio Mg : Ga = 4.5, exhibited pure lamellar phases. The acid-base properties of the mixed oxides obtained by calcination of the LDH's have been examined by microcalorimetric adsorption of CO2 and by FTIR spectroscopy upon CH3CN interaction. These techniques gave evidence that the number and strength of acid and basic sites were influenced by the nature and amount of the trivalent cation, as well as by the preparation method MH - France MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 23 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000179554700083 L2 - CLAISEN-SCHMIDT CONDENSATION; ALDOL CONDENSATION; MG-AL; THERMAL-DECOMPOSITION; HYDROTALCITES; CATALYSIS; ACETONE; ZEOLITES; CATION; OXIDES SO - Journal of Materials Chemistry 2002 ;12(12):3832-3838 6957 UI - 11088 AU - Ticktin T AU - Nantel P AU - Ramirez F AU - Johns T AD - McGill Univ, Dept Plant Sci, St Anne De Bellevue, PQ, CanadaUniv Hawaii Manoa, Dept Bot, Honolulu, HI 96822, USAProyecto Sierra Santa Marta AC, Xalapa 91000, Veracruz, MexicoMcGill Univ, Ctr Indigenous Peoples Nutr & Environm, St Anne De Bellevue, PQ H9X 3V9, CanadaTicktin, T, McGill Univ, Dept Plant Sci, 21 111 Lakeshore Rd, St Anne De Bellevue, PQ, Canada TI - Effects of variation on harvest limits for nontimber forest species in Mexico AB - Successful conservation of nontimber products and their rainforest habitats requires the identification of optimal harvest regimes, the accurate estimation of maximum harvest limits, and the implementation of those limits by local harvesters. We used a combination of participatory research techniques and demographic modeling to determine maximum sustainable harvest rates of the bromeliad Aechmea magdalenae in the buffer zone of the Los Tuxtlas Biosphere Reserve in Mexico. We examined the effects of three types of variation on maximum harvest rates: variation between forest types, between harvest regimes, and over time. We also tested the accuracy of estimating maximum harvest limits using matrix-model projections of unharvested populations. Maximum harvest rates of ramets from secondary forest populations were much higher than from primary-forest populations. Likewise, variation in local harvest regimes had a large effect on maximum harvest rates. Populations concurrently harvested for leaves and ramets had higher maximum sustainable levels of ramet harvest than those harvested for ramets only. Simulations using harvested and unharvested populations yielded significantly different estimates of maximum sustainable harvest limits, indicating that methods for calculating maximum harvest limits that assume linear responses to harvest may lead to erroneous conclusions. Active participation in the research process enabled local harvesters to accept as valid the harvest limits determined in this study, to switch to using a more sustainable harvest regime, and to pass a local law prohibiting the destruction of their remaining primary forest because of its potential as A. magdalenae habitat MH - Canada MH - Mexico|Veracruz MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 23 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000175832000018 L2 - AMERICAN GINSENG; MATRIX MODEL; DEMOGRAPHY; MANAGEMENT; HERB SO - Conservation Biology 2002 ;16(3):691-705 6958 UI - 10530 AU - Tiemann KJ AU - Rascon AE AU - Gamez G AU - Parsons JG AU - Baig T AU - Cano-Aguilera I AU - Gardea-Torresdey JL AD - Univ Texas, Dept Chem & Environm Sci & Engn, PhD Program, El Paso, TX 79968, USAUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoGardea-Torresdey, JL, Univ Texas, Dept Chem & Environm Sci & Engn, PhD Program, El Paso, TX 79968 USA TI - Heavy metal binding by inactivated tissues of Solanum elaeagnifolium: chemical and subsequent XAS studies AB - Contamination caused by heavy metals as well as their toxic effects on the environment and mankind is well known. However, it has been observed that some native plants have survived within areas polluted with heavy metals. This has been the case with the woody subshrub Solanum elaeagnifolium. It is possible to take advantage of this singular feature by using its inactivated tissues as a biofiltration system. In this work we characterized the mechanism of the binding between the biomass tissues with heavy metals by using chemical modification techniques. These techniques included chemical esterification and hydrolyzation of carboxylic groups and methyl esters, respectively. These studies have shown an overall decrease in metal binding for the esterified biomass, and an overall increase in metal binding for the hydrolyzed biomass as compared with the unmodified biomass. These experiments were performed with Cu(II), Pb(II), Cr(III), Zn(II) and Ni(II). In addition, experiments conducted with modified biomass at different pH conditions were done in order to corroborate the biomass modification results. Also, we used X-ray absorption spectroscopy techniques (XANES and EXAFS) to elucidate the mechanism(s) of metal ion binding. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0026-265X UR - ISI:000177234600004 L2 - bioremediation;binding mechanism;heavy metals;solanum elaeagnifolium;X-ray absorption spectroscopy;MEDICAGO-SATIVA ALFALFA; RAY-ABSORPTION SPECTROSCOPY; BIOMASS; REDUCTION; CR(III); DETOXIFICATION; CR(VI) SO - Microchemical Journal 2002 ;71(2-3):133-141 6959 UI - 9937 AU - Tiersch H AU - Tovmassian HM AU - Stoll D AU - Amirkhanian AS AU - Neizvestny S AU - Bohringer H AU - MacGillivray HT AD - Sternwarte Konigsleiten, D-81477 Munich, GermanyInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNAS, Byurakan Astrophys Observ, Yerevan, ArmeniaRAS, Special Astrophys Observ, Nizhnii Arkhyz, RussiaMax Planck Inst Extraterr Phys, D-8046 Garching, GermanyRoyal Observ, Edinburgh EH9 3HJ, Midlothian, ScotlandTiersch, H, Sternwarte Konigsleiten, Leimbachstr 1A, D-81477 Munich, Germany TI - Shakhbazian compact galaxy groups - I. Photometric, spectroscopic and X-ray study of ShCG 154, ShCG 166, ShCG 328, ShCG 360 AB - Shakhbazian compact galaxy groups belong to the interesting class of compact groups. Because of their large number (the catalogue contains 377 entries) we are able to study the groups in different stages of evolution. Here we give the results of detailed study of four groups, ShCG 154, ShCG 166, ShCG 328 and ShCG 360. We present the redshifts of individual galaxies in groups, the results of the surface photometry in BVR, the contourplots of the surface brightness versus effective radius of galaxies, the twisting postion angle versus effective radius of galaxies, the radial velocity dispersions, the crossing times, the mass-to-luminosity ratios of groups and the results of the X-ray study. The dynamical state of groups, interactions between member galaxies, and the physical parameters of groups are discussed MH - Armenia MH - Germany MH - Mexico|Puebla MH - Russia MH - United Kingdom PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000177868700009 L2 - galaxies : clusters : general;galaxies : interactions;galaxies : kinematics and dynamics;galaxies : photometry;X-rays : galaxies;ELLIPTICAL GALAXIES; INFRARED-EMISSION; ABELL CLUSTERS; CATALOG; MORPHOLOGY; EVOLUTION; MERGERS; SIMULATIONS; SKY SO - Astronomy & Astrophysics 2002 ;392(1):33-52 6960 UI - 11331 AU - Timossi C AU - Maldonado D AU - Vizcaino A AU - Lindau-Shepard B AU - Conn PM AU - Ulloa-Aguirre A AD - Hosp Gineobstetricia Luis Castelazo Ayala, Inst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoNew York State Dept Hlth, Wadsworth Ctr, David Axelrod Inst Publ Hlth, Albany, NY, USAOregon Hlth Sci Univ, Oregon Reg Primate Res Ctr, Beaverton, OR, USAUlloa-Aguirre, A, IMSS, Res Unit, Unidad Independencia, Apartado Postal 99-065, Mexico City 10101, DF, Mexico TI - Structural determinants in the second intracellular loop of the human follicle-stimulating hormone receptor are involved in G(s) protein activation AB - In the present study, we analyzed the structural determinants present in the second intracellular loop (IL-2) of the human follicle-stimulating hormone (FSH) receptor (R) involved in G(s) protein-mediated signal transduction. Human embryonic kidney 293 (HEK-293) cells, stably expressing wild-type (Wt) human FSHR (HEK-293((+))), were transiently transfected with plasmids containing cDNAs encoding the entire IL-2 or several IL-2 sequences mutated in R467 (a residue located at the center of the conserved ERW motif in the glycoprotein hormone receptors). T470 (a potential site for phosphorylation by protein kinase-A and -C) or L477 (a residue conserved in all glycoprotein hormone receptors). Expression of the IL-2 Wt in HEK-293((+)) cells reduced the maximum FSH-stimulated cAMP production significantly by similar to 40%; similar results were observed with the R467A and R467K IL-2 mutants. The IL-2(R467H), IL-2(T470A), the triple R467A/T470A/L477A IL-2 mutant and the IL-2 of the oxytocin receptor (G(q.11)-coupled) had no effects on Wt FSHR-mediated intracellular signaling whereas the L477A mutation provoked a higher (similar to 55%) inhibition of FSH-stimulated cAMP than the free, Wt IL-2. These results suggested a specific role of IL-2 residues in FSHR function. Site directed mutagenesis of the FSHR and the expression of resulting mutants in HEK-293 cells were performed in order to corroborate the effects of these substitutions. Expression of FSHR(R467H), FSHR(R467A) and FSHR(T470A) failed to mediate ligand-provoked G(s) protein activation, whereas the R467K mutant behaved as the Wt receptor. Interestingly, the expression of L477A, L477D and L477P FSHR mutants conferred elevated basal cAMP levels to HEK-293 cells. This study indicates that the IL-2 of the human FSHR possesses amino acid residues that are important for both coupling the receptor to the G(s) protein (R467 and T470) and maintaining the receptor molecule in an inactive conformation (L477). It appears that this particular intracellular domain may act as a conformational switch to produce the activation of G proteins as has been reported for the IL-2 of other G protein-coupled receptors. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 12 U4 - Cell Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0303-7207 UR - ISI:000175082500015 L2 - follicle-stimulating hormone;follicle-stimulating hormone receptor;intracellular signaling;G protein-coupled receptors;G proteins;IMPAIR SIGNAL-TRANSDUCTION; HIGHLY-CONSERVED ARGININE; BETA-ADRENERGIC-RECEPTOR; RAT TESTIS MEMBRANES; 3RD CYTOPLASMIC LOOP; COUPLED RECEPTORS; CONSTITUTIVE ACTIVATION; LUTROPIN/CHORIOGONADOTROPIN RECEPTOR; SYNTHETIC PEPTIDES; AMINO-ACID SO - Molecular and Cellular Endocrinology 2002 ;189(1-2):157-168 6961 UI - 11363 AU - Titov OY AU - Giraldo J AU - Gurevich YG AD - IPN, CICATA, Queretaro 76040, MexicoUniv Nacl Colombia, Grp Fis Mat Condensada, Bogota, ColombiaIPN, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoTitov, OY, IPN, CICATA, Av Jose Siurob 10,Col Alameda, Queretaro 76040, Mexico TI - Boundary conditions in an electric current contact AB - In most electronic devices, the electric current of both types (electrons and holes) flows through a junction. Usually the boundary conditions have been formulated exclusively for open circuit. The boundary conditions proposed here bypass this limitation. Besides, these boundary conditions correctly describe the current flow in a circuit, i.e., closed circuit conditions, which are the usual operation conditions for electronic devices and for the measurement of many transport properties. We also have generalized the case (as much as it is possible in a classical treatment), so self-consistent boundary conditions that describe the current flow through a contact between two arbitrary conducting media are developed in the present work. These boundary conditions take into account a recently developed theory: influence of temperature space inhomogeneity due to the interfaces and quasiparticles temperature mismatch on thermogeneration and recombination. They also take into account surface resistance, surface recombination rates, and possible temperature discontinuities at the interface due to finite surface thermoconductivity. The temperature difference between current carriers and phonon subsystems is also included in this approach. (C) 2002 American Institute of Physics MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000175144300026 L2 - SEMICONDUCTORS SO - Applied Physics Letters 2002 ;80(17):3108-3110 6962 UI - 10556 AU - Tkachenko M AU - Yaschenko I AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoMoscow Ctr Continuous Math Educ, Moscow, RussiaTkachenko, M, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Av Michoacan & Purisima S-N, Mexico City 09340, DF, Mexico TI - Independent group topologies on Abelian groups AB - Two non-discrete T-1 topologies tau(1), tau(2) on a set X are called independent if their intersection tau(1) boolean AND tau(2) is the cofinite topology on X. We show that a countable group does not admit a pair of independent group topologies. We use MA to construct group topologies on the additive groups R and T independent of their usual interval topologies. These topologies have necessarily to be countably compact and cannot contain convergent sequences other than trivial. It is also proved that all proper unconditionally closed subsets of an Abelian (almost) torsion-free group are finite. Finally, we generalize the result proved for R and T by showing that every second countable group topology on an Abelian group of size 2(omega) without non-trivial unconditionally closed subsets admits an independent group topology (this also requires MA). In particular, this implies that under MA, every (almost) torsion-free Abelian group of size 2(omega) admits a Hausdorff countably compact group topology. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000177061300033 L2 - independent topology;transversal topology;dual group;countably compact;convergent sequence;unconditionally closed set;Martin's Axiom;Continuum Hypothesis;COUNTABLY COMPACT; MA(COUNTABLE) SO - Topology and Its Applications 2002 ;122(1-2):425-451 6963 UI - 11653 AU - To S AU - Lee WB AU - Zhu YH AD - Hong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Hong Kong, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoZhu, YH, Hong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Hong Kong, Peoples R China TI - Ultra-precision machining induced surface structural changes of Zn-Al alloy AB - Ultra-precision machining was carried out on a furnace cooled (FC) eutectoid Zn-Al alloy specimen using a new technology of single point diamond turning (SPDT). Microstructural changes and phase decomposition at the surface of the ultra-precision machined alloy specimen were investigated. It was found that the ultra-precision machining induced external stress resulted in decomposition of the epsilon phase and crystal orientation changes of the Zn-rich phases: eta and epsilon, at the surface of the machined FC Zn-Al alloy specimen, which were in agreement with the tensile stress induced phase transformations and crystal orientation changes in the FC Zn-Al alloy specimen. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000174080600060 L2 - ultra-precision machining;phase decomposition;tensile deformation;Zn-Al alloys;DEFORMATION SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2002 ;325(1-2):497-502 6964 UI - 12038 AU - Tobenas S AU - Larramendi EM AU - Puron E AU - de Melo O AU - Cruz-Gandarilla F AU - Hesiquio-Garduno M AU - Tamura M AD - Univ Havana, IMRE, Fac Phys, Havana 10400, CubaNatl Polytech Inst, ESFM, Mexico City, DF, MexicoIPN, CINVESTAV, Dept Phys, Mexico City 07738, DF, Mexicode Melo, O, Univ Havana, IMRE, Fac Phys, Colina Univ, Havana 10400, Cuba TI - Growth of Cd((1-chi))Zn chi Te epitaxial layers by isothermal closed space sublimation AB - The growth and structural characterization of Cd1-xZnxTe epitaxial films on (1 0 0) GaAs substrates is reported. The samples were obtained by a novel isothermal closed space sublimation technique, which was previously used for the growth of ZnTe in atomic layer epitaxy regime. For growing the films, a GaAs substrate is exposed alternately to the elemental sources (Cd, Zn, Te) at isothermal condition employing a closed space geometry. Eleven different ZnTe: CdTe cycle combinations were done to obtain different Zn compositions. The Zn molar fractions were measured by X-ray and transmission electron diffraction patterns that also revealed the epitaxial quality of the films. Influence of the growth parameters on the composition and the thickness of the films is discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000173057500005 L2 - vapor phase epitaxy;alloys;semiconducting II-VI materials;CDTE SO - Journal of Crystal Growth 2002 ;234(2-3):311-317 6965 UI - 9508 AU - Toledo VH AU - Noguera FA AU - Chemsak JA AU - Hovore FT AU - Giesbert EF AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoIBUNAM, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoEssig Museum Entomol, Berkeley, CA 94720, USAToledo, VH, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, AP 70-153, Mexico City 04510, DF, Mexico TI - The Cerambycid fauna of the tropical dry forest of "El Aguacero," Chiapas, Mexico (Coleoptera : Cerambycidae) AB - The results of a study on the fauna of Cerambycidae of the tropical dry forest of "El Aguacero," Chiapas, Mexico are presented. Data were obtained during a year of monthly collections and records obtained during sporadic collections carried out mainly during the rainy season. A total of 203 species, representing 119 genera, 42 tribes and four subfamilies were recorded. Seventy-nine species were recorded for the first time for the state of Chiapas. The subfamilies with the greater numbers of species, genera and tribes were the Cerambycinae with 111, 66 and 22 and Lamiinae with 81, 45 and 16, respectively. The genera with the greatest numbers of species were Stenosphenus Haldeman, Sphaenothecus Dupont, Lepturges Bates and Phaea Newman with six each and Anelaphus Linsley, Psyrassa Pascoe, Neocompsa Martins and Acyphoderes Serville with five each. The largest number of species was recorded during June (101) and the least during March (two); the largest number of individuals was recorded during September and the least during February. Seasonally, 165 species were collected during the rainy season, 17 during the dry season and 21 during both. Six hundred twenty two individuals were collected during the rainy season and 249 during the dry season. The species abundance pattern showed few abundant species and many with few individuals (63% were represented by three or fewer individuals). The most abundant species were Stenosphenus cribripennis cribripennis Thomson (51 individuals), Essostrutha laeta (Newman) (45), Ironeus pulcher Bates (43), Ochraethes sp. near O. sommeri (Chevrolat) (38), Sphaenothecus toledoi Chemsak and Noguera (33), Sphaenothecus trilineatus Dupont (3 1), Ochraethes pollinosa Chevrolat (3 1) and Sphaenothecus maccartyi Chemsak and Noguera (30). The seasonal activity of most species as adults was restricted, with 141 species found only during one month and 37 during two months. The fauna of "El Aguacero" was compared with two other similar sites in Mexico, and is more similar to that of Chamela, Jalisco than to that of Huautla, Morelos; sharing 78 species with the first and only 41 with the second MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000180092400007 SO - Coleopterists Bulletin 2002 ;56(4):515-532 6966 UI - 11996 AU - Topp CN AU - Ruiz-Herrera J AU - Martinez-Espinoza AD AU - Gold SE AD - Univ Georgia, Dept Plant Pathol, Athens, GA 30602, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Ingn Genet, Irapuato 36500, Gto, MexicoGold, SE, Univ Georgia, Dept Plant Pathol, Athens, GA 30602, USA TI - Integration of the gene for Carboxin resistance does not impact the Ustilago maydis - Maize interaction AB - A previous report indicated that insertion of the carboxin resistance (cbx(R)) gene into the Ustilago maydis genome impaired the pathogenic ability of the fungus towards Zea mays, the corn host. Because we had anecdotal evidence from work in our laboratory that this was not necessarily the case we decided to determine how general was the observation of reduced pathogenicity associated with cbx(R). To accomplish this we tested the pathogenicity of several strains that had been transformed with the cbx(R) gene and compared them with non-transformed strains or strains transformed with the gene conferring hygromycin resistance which is a commonly used selectable marker in this fungus. Our results indicate that carboxin resistance does not significantly alter pathogenicity and is therefore a suitable marker for use in genetic analysis of U. maydis MH - Mexico|Guanajuato MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000173276700012 L2 - SULFUR PROTEIN SUBUNIT; LOOSE SMUT; FILAMENTOUS GROWTH; CONFERS RESISTANCE; NUDA; FUNGICIDE; SEQUENCE; PATHOGEN; TRITICI; KINASE SO - Current Microbiology 2002 ;44(1):67-70 6967 UI - 11598 AU - Torchynska T AU - guilar-Hernandez J AU - Rodriguez MM AU - Mejia-Garcia C AU - Contreras-Puente G AU - Espinoza FGB AU - Bulakh BM AU - Scherbina LV AU - Goldstein Y AU - Many A AU - Jedrzejewski J AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoNatl Acad Sci, Inst Semicond Phys, UA-252028 Kiev, UkraineHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelTorchynska, T, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Comparative investigations of photoluminescence of silicon wire structures and silicon oxide films AB - Photoluminescence spectra and their dependence on temperature as well as Raman scattering spectra and Atomic Force Microscopy investigations have been used to study the peculiarities of the red photoluminescence band in low-dimensional Si structures, such as porous silicon and silicon oxide films. It has been shown that the red photoluminescence band of porous silicon is complex and can be decomposed into two elementary bands. It was discovered that elementary band intensities depend very much on surface morphology of porous silicon. The same positions of the photoluminescence bands are also observed in silicon oxide films for different oxide composition. Comparative investigation of the PL temperature dependences in porous silicon and silicon oxide films indicates that silicon-oxide defect related mechanisms of some elementary photoluminescence bands are involved. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000174453800004 L2 - POROUS SILICON; VISIBLE PHOTOLUMINESCENCE; LIGHT-EMISSION; LUMINESCENCE; EXCITATION; SI; NANOCRYSTALS; CONFINEMENT SO - Journal of Physics and Chemistry of Solids 2002 ;63(4):561-568 6968 UI - 10200 AU - Torchynska TV AU - Rodriguez MM AU - Polupan GP AU - Khomenkova LI AU - Korsunskaya NE AU - Papusha VP AU - Scherbina LV AU - Domashevskaya EP AU - Terekhov VA AU - Turischev SY AD - UPALM, Natl Polytech Inst, Mexico City 07738, DF, MexicoNatl Acad Sci, Inst Semicond Phys, UA-28 Kiev, UkraineVoronezh State Univ, Dept Solid State Phys, Voronezh 394693, RussiaTorchynska, TV, UPALM, Natl Polytech Inst, Mexico City 07738, DF, Mexico TI - USXES and optical phenomena in Si low-dimensional structures dependent on morphology and silicon oxide composition on Si surface AB - It has been shown that the intensive and broad "red" photoluminescence band in porous silicon is a nonelementary one and could be decomposed on at least three elementary bands. Photoluminescence, ultrasoft X-ray emission spectroscopy, infrared absorption and atomic force microscopy methods were used to study the reasons for both luminescence band appearance in porous silicon photoluminescence spectra, prepared in different technological conditions. The mechanisms of radiative transition for both elementary bands have been discussed as well MH - Mexico|Distrito Federal MH - Russia MH - Ukraine PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178109900060 L2 - POROUS SILICON; PHOTOLUMINESCENCE; EXCITATION SO - Surface Review and Letters 2002 ;9(2):1047-1052 6969 UI - 11554 AU - Torchynska TV AU - Rodriguez MM AU - Espinoza FGB AU - Khomenkova LY AU - Korsunska NE AU - Scherbina LV AD - Inst Politecn Nacl, UPALM, ESFM, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, Kiev, UkraineTorchynska, TV, Inst Politecn Nacl, UPALM, ESFM, Ed 9, Mexico City 07738, DF, Mexico TI - Ballistic effect in red photoluminescence of Si wires AB - The excitation, emission, electron paramagnetic resonance, and Raman scattering spectra of as-prepared and aged Si wires, like porous silicon, have been examined. Atomic force microscope is used for the surface morphology investigation, as well as the study of this morphology connection with photoluminescence (PL) peculiarities. Two elementary PL bands in red and orange spectral ranges: hnu(m) = 1.70-1.73 and 1.80-2.00 eV, have been observed. It is shown the ballistic effect can enhance very effective hot carrier excitation of interface-defect related PL (hnu(m) 51.70-1.73 eV) in low-dimensional Si wire structures. The confirmation of the last conclusion is important for understanding the mechanism of Si wire PL and successful application of Si low-dimensional structures in optoelectronics devices MH - Mexico|Distrito Federal MH - Ukraine PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000174548400082 L2 - RESONANTLY EXCITED PHOTOLUMINESCENCE; POROUS SILICON PHOTOLUMINESCENCE; VISIBLE PHOTOLUMINESCENCE; OPTICAL-PROPERTIES; SURFACE OXIDATION; QUANTUM-WIRE; LUMINESCENCE; EXCITATION; SPECTROSCOPY; MECHANISM SO - Physical Review B 2002 ;65(11): 6970 UI - 11218 AU - Torner L AU - Toschi N AU - Nava G AU - Clapp C AU - Neumann ID AD - Univ Regensburg, Inst Zool, D-93053 Regensburg, GermanyMax Planck Inst Psychiat, D-8000 Munich, GermanyUNAM, Neurobiol Ctr, Queretaro, MexicoTorner, L, Univ Regensburg, Inst Zool, Univ Str 31, D-93053 Regensburg, Germany TI - Increased hypothalamic expression of prolactin in lactation: involvement in behavioural and neuroendocrine stress responses AB - Prolactin (PRL) has recently been shown to exert an anxiolytic effect in male and virgin female rats, as well as an inhibitory tone on hypothalamic-pituitary-adrenal (HPA) axis activity. Reduced emotional and neuroendocrine stress responses have been described in lactation, a time of high blood PRL levels. Here we tested brain PRL-receptor (PRL-R)-mediated effects on anxiety, maternal behaviour, HPA axis and oxytocin stress responses in lactating rats. Chronic intracerebroventricular (i.c.v.) infusion of antisense oligonucleotides against the long form of the PRL-R (AS; osmotic minipump, 0.5 mug/0.5 muL/h) in order to downregulate brain PRL-R expression increased the anxiety-related behaviour on the elevated plus maze (P<0.01) compared with mixed bases- and vehicle-treated rats. Also, PRL-R AS treatment impaired maternal behaviour (P<0.05), whereas physiological parameters of lactation (weight gain of the litter, number of milk ejection reflexes during a 20-min suckling period) were not affected. PRL-R AS treatment further evoked an increase (P<0.05) in the stress-induced adrenocorticotropin release, demonstrating an inhibitory role of PRL on HPA axis responses in lactation. Inhibition of stress responses of the oxytocin system by brain PRL was evidenced by higher stress-induced (P<0.05) plasma oxytocin concentration in PRL-R AS-treated lactating rats and, in contrast, decreased stress-induced oxytocin release (P<0.01) in chronic i.c.v. ovine PRL-treated (1 mug/0.5 muL/h) virgin rats. Finally, an increased expression of the hypothalamic PRL gene was seen by RT-PCR in pregnancy and lactation, suggesting an activated state of the brain PRL system during the peripartum period. In summary, activation of the brain PRL system in the peripartum period significantly contributes to emotional and neuroendocrine adaptations, including downregulation of the responsiveness of the HPA axis and oxytocin systems to stressors seen at this time MH - Germany MH - Mexico|Queretaro PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 35 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000175425800012 L2 - antisense;anxiety;brain;maternal behaviour;prolactin receptors;CORTICOTROPIN-RELEASING FACTOR; ANXIETY-RELATED BEHAVIOR; RECEPTOR MESSENGER-RNA; MATERNAL-BEHAVIOR; FEMALE RATS; PHYSIOLOGICAL-ROLE; BRAIN OXYTOCIN; PREGNANT RATS; C-FOS; SECRETION SO - European Journal of Neuroscience 2002 ;15(8):1381-1389 6971 UI - 9178 AU - Torrelles JM AU - Patel NA AU - Gomez JF AU - Ho PTP AU - Rodriguez LF AU - Anglada G AU - Garay G AU - Greenhill L AU - Curiel S AU - Canto J AD - CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USA. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Chile, Dept Astron, Santiago, Chile. UNAM, Inst Astron, Mexico City 04510, DF, Mexico TI - VLBA multi-epoch water maser observations towards Cepheus A AB - We have carried out and recently reported VLBA multi-epoch water maser observations toward Cepheus A with an angular and velocity resolution of 0.5 mas and 0.2 km s(-1), respectively. Some of the masers detected previously with the VLA (observations made with angular and velocity resolutions of 80 mas and 1.3 km s(-1) respectively) are resolved now into linear/arcuate coherent "microstructures". These structures, while smaller than the VLA beam, are 6-200 times the size of the VLBA synthesized beam. The morphology and the observed proper motions found in these structures imply three different centers of star formation activity in a region of similar or equal to 0."3 radius (similar or equal to 200 AU). The most remarkable result from these observations is the discovery of an arc of water masers which is perfectly fitted by a circle to one part in a thousand. This arc is expanding and suggests a spherical "puff" of ejected material ejected 33 years ago from a protostar located 600 mas south of the radio jet HW2. This spherical ejection represents a very strong challenge for theoretical studies of star formation MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - USA T3 - COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLESIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBW16P AV - English IS - 0074-1809 UR - ISI:000181054300017 SO - 2002 ;(206):84-87 6972 UI - 10447 AU - Torrentera FA AU - Laman JD AU - Van Meurs M AU - Adorini L AU - Muraille E AU - Carlier Y AD - ULB, Fac Med, Parasitol Lab, B-1070 Brussels, BelgiumInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Immunol, Mexico City, DF, MexicoErasmus MC Rotterdam EUR, Dept Immunol, Rotterdam, NetherlandsBioxell, Milan, ItalyCarlier, Y, ULB, Fac Med, Parasitol Lab, CP 616,Route Lennik 808, B-1070 Brussels, Belgium TI - Endogenous interleukin-12 is critical for controlling the late but not the early stage of Leishmania mexicana infection in C57BL/6 mice AB - The role of interleukin-12 (IL-12) has been clearly established in the resistance of C57BL/6 (B6) mice to Leishmania major infection, but its involvement in the control of Leishmania mexicana infection remains to be determined. Here, we show the following. (i) L. mexicana, in contrast to L. major, induces the development of nonhealing lesions in B6 mice. (ii) Cells expressing IL-12p40, gamma interferon (IFN-gamma), NOS2, and CD40L are numerous in the footpad lesion and/or the draining popliteal lymph node of animals infected for up to 14 weeks with L. mexicana. (iii) B6 mice, either IL-12p40 deficient or treated with IL-12p40-neutralizing antibodies, display a dramatic enhancement of primary and secondary lesions leading to death 10 weeks after inoculation with L. mexicana. (iv) Splenocytes harvested 4 and 8 weeks after infection of IL-12p40(-/-) B6 mice with L. mexicana are unable to produce IFN-gamma, but secrete IL-4, IL-10, and IL-18. Thus, the early control of L. mexicana infection by B6 mice is independent of IL-12, whereas IL-12 and Th1 responses play a key role in controlling the late stages of L. mexicana infection. However, they fail to resolve lesions, in contrast to L. major infection, emphasizing the different outcomes induced by these two Leishmania species in B6 mice MH - Belgium MH - Italy MH - Mexico|Distrito Federal MH - Netherlands PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000177491100040 L2 - CELL-MEDIATED-IMMUNITY; MAJOR INFECTION; CUTANEOUS LEISHMANIASIS; BALB/C MICE; AMAZONENSIS INFECTION; IL-12 RESPONSIVENESS; DENDRITIC CELLS; TH1 RESPONSES; RESISTANT; LACKING SO - Infection and Immunity 2002 ;70(9):5075-5080 6973 UI - 10720 AU - Torrentera FA AU - Lambot MA AU - Laman JD AU - Van Meurs M AU - Kiss R AU - Noel JC AU - Carlier Y AD - Free Univ Brussels, Fac Med, Parasitol Lab, B-1070 Brussels, BelgiumFree Univ Brussels, Erasmus Hosp, Dept Pathol, B-1070 Brussels, BelgiumErasmus Univ, Dept Immunol, NL-3000 DR Rotterdam, NetherlandsFree Univ Brussels, Fac Med, Lab Histopathol, B-1070 Brussels, BelgiumIPN, Escuela Nacl Ciencias Biol, Dept Immunol, Mexico City 07738, DF, MexicoCarlier, Y, Free Univ Brussels, Fac Med, Parasitol Lab, CP 616,Route Lennik 808, B-1070 Brussels, Belgium TI - Parasitic load and histopathology of cutaneous lesions, lymph node, spleen, and liver from BALB/c and C57BL/6 mice infected with Leishmania mexicana AB - The course of infection, parasitic loads, and histopathology of cutaneous lesions, draining lymph node, spleen, and liver were compared in BALB/c and C57BL/6 mice over a period of 34 weeks after inoculation in footpad with promastigotes of a Leishmania mexicana reference strain. The results show that the primary footpad lesions first present a 12-week phase that develops similarly in both strains of mice. Thereafter, a cutaneous and visceral dissemination of L. mexicana parasites occurs in BALB/c mice; the latter experience an extensive breakdown of the lymphoid organ microarchitecture, whereas C57BL/6 mice succeed in eliminating the parasite infection from the lymph nodes but not from the primary cutaneous lesion, which does not heal. These results highlight marked differences between responses of key anatomical compartments controlling L. mexicana infection in BALB/c and C578L/6 mice MH - Belgium MH - Mexico|Distrito Federal MH - Netherlands PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000176820600010 L2 - CD4(+) T-CELLS; VISCERAL LEISHMANIASIS; AMAZONENSIS INFECTION; GENE; SUSCEPTIBILITY; PROMASTIGOTES; EPIDEMIOLOGY; PATHOGENESIS; RESPONSES; DISEASE SO - American Journal of Tropical Medicine and Hygiene 2002 ;66(3):273-279 6974 UI - 9612 AU - Torrentera L AU - breu-Grobois FA AD - SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794, USAUNAM, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan 82000, Sinaloa, MexicoTorrentera, L, SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794 USA TI - Cytogenetic variability and differentiation in Artemia (Branchiopoda : Anostraca) populations from the Yucatan Peninsula, Mexico AB - Chromosome numbers in somatic (naupliar) and germinal (adult male) cells of bisexual Artemia populations from the Yucatan Peninsula, SE Mexico (Celestun, CEL; Chuburna, CHUB; Xtampu, XTAM; and Las Coloradas, COL), were compared to those from San Francisco Bay (SFB) and Great Salt Lake (GSL) individuals. Diploid and haploid counts permitted a double-check on results. SFB and GSL samples had low variability in number of chromosomes, with strong modal values of 2n=42 and n=21, typical for A. franciscana. Chromosome counts in the Yucatan brine shrimp samples indicated deviations from the normal 2n=42 karyotype (heteroploidy): COL had chromosome modes of 2n=42 and n=21; CEL of 2n=40 and n=20; CHUB had 2n=44 and n=22; XTAM 2n=48 and n=24. Chromocenter abundance (heterocromatic blocks of highly repetitive DNA) among populations indicated that the North American brine shrimp from SFB and GSL had a mean of 15.9 and 15.1 chromocenters, respectively. From the Yucatan brine shrimp, COL had a variable number of chromocenters, ranging from 5 to 15 with a mean value of 9.9. The other three Artemia populations had much fewer chromocenters (CEL 1-3, XTAM 1-8, and CHUB 1-4). Heteromorphic sex chromosomes were apparent in some Yucatan karyotypes preparations. The haplotype condition in the Yucatan Artemia populations, though similar to that found in some Italian A. salina populations, is reported for the first time in New World Artemia. This cytological characteristic of the Yucatan Artemia, in conjunction with their morphological and allozyme differentiation, could provide new insight for the role of chromosome rearrangements in the evolutionary process of Artemia in the New World MH - USA MH - Mexico|Sinaloa PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000179641100033 L2 - genetic differentiation;heteroploidy;karyotype;chromocenters;chromosome number;heterochromatin;speciation;MORPHOLOGICAL CHARACTERIZATION; PARTHENOGENETIC ARTEMIA; CHROMOSOMAL EVOLUTION; AMERICAN POPULATIONS; NORTHERN GREECE; GENUS ARTEMIA; BRINE SHRIMP; SPECIATION; HETEROCHROMATIN; CRUSTACEA SO - Hydrobiologia 2002 ;486(1):303-314 6975 UI - 10587 AU - Torres-Arreola L AU - Berkowtiz G AU - Torres-Sanchez L AU - Lopez-Cervantes M AU - Cebrain-Garcia M AU - Uribe M AU - Lopez-Carrillo L AD - Natl Polytech Inst, Ctr Res & Adv Studies, Mexico City, DF, MexicoNatl Inst Hlth, Mexico City, DF, MexicoMt Sinai Sch Med, Div Environm Hlth Sci, New York, NY, USANatl Inst Publ Hlth, Morelos, MexicoMexican Inst Social Secur, Natl Med Ctr Century XXI, Epidemiol & Hlth Serv Res Unit, Mexico City, DF, Mexico TI - Preterm birth in relation to maternal organochlorine serum levels MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600613 SO - Epidemiology 2002 ;13(4):S198-S198 6976 UI - 11740 AU - Torres-Delgado G AU - Zuniga-Romero CI AU - Jimenez-Sandoval O AU - Castanedo-Perez R AU - Chao B AU - Jimenez-Sandoval S AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, MexicoEnergy Convers Devices, Troy, MI 48084, USAUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76001, MexicoTorres-Delgado, G, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Apartado Postal 1-798, Queretaro 76001, Mexico TI - Percolation mechanism and characterization of (CdO)(y)(ZnO)(1-y) thin films AB - (CdO)(y)(ZnO)(1-y) thin films have been prepared by the sol-gel process, based on precursor solutions used separately for such oxides. The Cd/(Cd + Zn) atomic ratio in solution ranged from 0 to 0.32. These compositions were selected on the basis of an observed abrupt fall, of ca. four orders of magnitude. in the resistivity of the films within this range. Such a resistivity drop. with a threshold value of around y = 0.17, is consistent with a percolation mechanism in a three-dimensional. random, two-phase system composed of isotropic, sphere-like, conducting CdO regions embedded in a highly resistive ZnO matrix. Optical measurements show that the films are highly transparent. above 90% transmission, for wavelengths greater than or equal to600 nm. The optical absorption edge shifts to longer wavelengths as the Cd content in the film increases. On the basis of the percolation mechanism observed in the multicomponent system (CdO)(y)(ZnO)(1-y), possible future pathways are proposed for the design and construction of highly efficient, transparent, conducting oxides MH - Mexico|Queretaro MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1616-301X UR - ISI:000174125900007 L2 - SOL-GEL METHOD; ZINC-OXIDE; ZNO FILMS; SPRAY; TEMPERATURE; ORIENTATION; ACETATE; CDO SO - Advanced Functional Materials 2002 ;12(2):129-133 6977 UI - 9485 AU - Torres-Moreno JM AU - Aguilar JC AU - Gordon MB AD - Ecole Polytech, Dept Genie Informat, Montreal, PQ H3C 3A7, CanadaLab Nacl Informat Avanzada, Xalapa, Veracruz, MexicoCNRS, IMAG, Lab Leibniz, F-38031 Grenoble, FranceUniv Quebec, ERMETIS, St Foy, PQ G1V 2M3, CanadaUniv Quebec, LANCI, St Foy, PQ G1V 2M3, Canada TI - The minimum number of errors in the N-parity and its solution with an incremental Neural Network AB - The N-dimensional parity problem is frequently a difficult classification task for Neural Networks. We found an expression for the minimum number of errors nu(f) as function of N for this problem, performed by a perceptron. We verified this quantity experimentally for N = 1,...,15 using an optimal train perceptron. With a constructive approach we solved the full N-dimensional parity problem using a minimal feedforward neural network with a single hidden layer of h = N units MH - Canada MH - France MH - Mexico|Veracruz PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence;Neurosciences U5 - J;Article AV - English IS - 1370-4621 UR - ISI:000180047800001 L2 - classification tasks;minimerror;monoplan;parity problem;perceptrons;supervised learning;ALGORITHM SO - Neural Processing Letters 2002 ;16(3):201-210 6978 UI - 11813 AU - Torres-Salazar D AU - Neely A AU - Naranjo D AD - Univ Valparaiso, Ctr Neurociencias Valparaiso, Valparaiso, ChileUniv Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - Ca2+ dependent increase of ionic currents due to recruitment of K+ channels into the plasma membrane of Xenopus oocytes MH - Chile MH - Mexico|Distrito Federal PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000173252701246 SO - Biophysical Journal 2002 ;82(1):254A-254A 6979 UI - 10586 AU - Torres-Sanchez L AU - Lopez-Carrillo L AU - Moline J AU - Ireland K AU - Wolff MS AD - Mt Sinai Sch Med, Dept Environm Hlth Sci, New York, NY, USANatl Inst Publ Hlth, Morelos, Mexico TI - Breastfeeding and serum p,p'DDT levels among Mexican women of childbearing age. A pilot study MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600612 SO - Epidemiology 2002 ;13(4):S197-S197 6980 UI - 10230 AU - Torres AG AU - Giron JA AU - Perna NT AU - Burland V AU - Blattner FR AU - velino-Flores F AU - Kaper JB AD - Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201, USABenemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Invest Microbiol, Puebla, MexicoUniv Wisconsin, Dept Anim Hlth & Biomed Sci, Madison, WI 53706, USAUniv Wisconsin, Genome Ctr Wisconsin, Madison, WI 53706, USAUniv Wisconsin, Genet Lab, Madison, WI 53706, USAKaper, JB, Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201 USA TI - Identification and characterization of lpfABCC ' DE, a fimbrial operon of enterohemorrhagic Escherichia coli O157 : H7 AB - The mechanisms underlying the adherence of Escherichia coli O157:H7 and other enterohemorrhagic E. coli (EHEC) strains to intestinal epithelial cells are poorly understood. We have identified a chromosomal region (designated lpfABCC'DE) in EHEC O157:H7 containing six putative open reading frames that was found to be closely related to the long polar (LP) fimbria operon (lpf) of Salmonella enterica serovar Typhimurium, both in gene order and in conservation of the deduced amino acid sequences. We show that lpfABCC'DE is organized as an operon and that its expression is induced during the exponential growth phase. The lpf genes from EHEC strain EDL933 were introduced into a nonfimbriated (Fim(-)) E. coli K-12 strain, and the transformed strain produced fimbriae as visualized by electron microscopy and adhered to tissue culture cells. Anti-LpfA antiserum recognized a ca. 16-kDa LpfA protein when expressed under regulation of the T7 promoter system. The antiserum also cross-reacted with the LP fimbriae in immunogold electron microscopy and Western blot experiments. Isogenic E. coli O157:H7 lpf mutants derived from strains 86-24 and AGT300 showed slight reductions in adherence to tissue culture cells and formed fewer microcolonies compared with their wild-type parent strains. The adherence and microcolony formation phenotypes were restored when the lpf operon was introduced on a plasmid. We propose that LP fimbriae participate in the interaction of E. coli O157:H7 with eukaryotic cells by assisting in microcolony formation MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 53 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000178125500010 L2 - BUNDLE-FORMING PILUS; BACTERIOPHAGE-T7 RNA-POLYMERASE; SALMONELLA-TYPHIMURIUM; PEYERS-PATCHES; GENETIC-LOCUS; HEP-2 CELLS; EAEA GENE; ADHERENCE; SEQUENCE; PATHOGENESIS SO - Infection and Immunity 2002 ;70(10):5416-5427 6981 UI - 12007 AU - Torres CR AU - Ochoa J AU - Castillo J AU - Van Woert M AD - San Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92182, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoCICESE, Ensenada, Baja California, MexicoNOAA, Natl Environm Satellite Data & Informat Serv, Off Res & Applicat, Washington, DC 20233, USATorres, CR, San Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92182 USA TI - Initial flow field of stratified flow past an impulsively started sphere AB - Numerical simulations of a linearly stratified diffusive flow past an impulsively started sphere are described. The impulsive start is perpendicular to isopycnal surfaces. The equations are transformed to generalized coordinates and then approximated by a finite difference scheme over a suitable grid which resolves both the diffusive and viscous boundary-layers. The results are compared with experimental evidence. (C) 2002 IMACS. Published by Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000173209600020 L2 - impulsive start;stratified fluid;FLUID SO - Applied Numerical Mathematics 2002 ;40(1-2):235-244 6982 UI - 9402 AU - Torres J AU - Gonzalez G AU - Atherton J AU - Dehesa M AU - Camorlinga MP AU - Munoz O AD - IMSS, Unidad Investigac Med Enfermedades Infecciosas, Mexico City, DF, MexicoIMSS, UIMEI, CMN, Mexico City, DF, MexicoUniv Nottingham, Sch Med, Nottingham, EnglandIMSS, Hosp Especialidades, Mexico City, DF, MexicoInst Mexicano Seguro Social, Mexico City, DF, Mexico TI - Simultaneous colonization with multiple quacispecies and multiple strains of Helicobacter pylori in different regions of the human stomach MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000178344100043 SO - Gut 2002 ;51():A11-A11 6983 UI - 12048 AU - Torres J AU - Camorlinga-Ponce M AU - Perez-Perez G AU - Munoz L AU - Munoz O AD - IMSS, CMN SXXI, Hosp Pediat, Unidad Invest Enfermedades Infecciosas, Mexico City 06720, DF, MexicoNYU, Sch Med, New York, NY, USATorres, J, IMSS, CMN SXXI, Hosp Pediat, Unidad Invest Enfermedades Infecciosas, 2 Piso,Av Cuauhtemoc 330, Mexico City 06720, DF, Mexico TI - Specific serum immunoglobulin G response to urease and CagA antigens of Helicobacter pylori in infected children and adults in a country with high prevalence of infection AB - Few studies have analyzed the immune response to Helicobacter pylori CagA and urease antigens across age groups in the same population. The aim of this study was to analyze the serologic immunoglobulin G (IgG) response to CagA and urease proteins in children and adults with gastrointestinal symptoms and belonging to the same population and similar socioeconomic levels. The serologic response was studied in 352 children and 293 adults with gastrointestinal symptoms. IgG antibodies against CagA and urease were tested by enzyme-linked immunosorbent assay methods using highly purified recombinant antigens. H. pylori infection was defined as a positive result in a serologic assay using whole-cell H. pylori extracts as the antigen. We found, in H. pylori-positive children, a seroprevalence of 46.9% to CagA and 16.2% to urease, whereas in H. pylori-positive adults, a seroprevalence of 78.9% to CagA and 59% to urease was found. In children, the magnitude of the response to CagA was significantly higher and the response to urease was significantly lower than those in adults. The kinetics of serologic response to CagA and to urease across age groups was contrastably different. Whereas CagA is a strong immunogen, urease is a poor immunogen during natural infection. These differences in the humoral response may be important for the short-term or long-term outcome of the infection. These results add to our knowledge of the epidemiology of H. pylori infection MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1071-412X UR - ISI:000173171000015 L2 - PEPTIC-ULCER DISEASE; GASTRIC INFLAMMATION; IMMUNE-RESPONSE; PROTEIN; ANTIBODIES; DIAGNOSIS; SEROPOSITIVITY; ERADICATION; ESTONIA; MEXICO SO - Clinical and Diagnostic Laboratory Immunology 2002 ;9(1):97-100 6984 UI - 10952 AU - Torres KB AU - Quintos NR AU - Necha LLB AU - Wink M AD - Inst Politecn Nacl, Ctr Desarrollo Prod Biot, Yautepac 62731, Morelos, MexicoUniv Heidelberg, Inst Pharmazeut Biol, D-69120 Heidelberg, GermanyTorres, KB, Inst Politecn Nacl, Ctr Desarrollo Prod Biot, POB 24, Yautepac 62731, Morelos, Mexico TI - Alkaloid profile of leaves and seeds of Lupinus hintonii C. P. Smith AB - L. hintonii C. P. Smith grows in the Central Highland forests of Mexico at altitudes between 2800 m to 3200 m above see level. Members of the genus Lupinus produce quinolizidine alkaloids as main chemical defensive compounds against herbivores. Surprisingly alkaloid profiles are rather constant within this species, while substantial variation was found when compared to morphologically closely related other taxa. As part of a phytochemical project on Mexican wild lupins, we report on the alkaloid profiles of seeds and leaves of L. hintonii. 19 alkaloids could be identified by capillary GLC-MS. Six major alkaloids occurred in leaves and seeds: 13-hydroxylupanine (28% and 45% respectively), tetrahydrorhombifoline (31% and 23% respectively), angustifoline (2% and 4% respectively), lupanine (7% and 5% respectively), 13alpha-tigloyloxylupanine (19% and 5% respectively) and 4alpha-angeloyl-3beta-hydroxylupanine (9% and 2%). This chemical pattern resembles that of the North American lupin L. floribundus MH - Germany MH - Mexico|Morelos PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000175998100007 L2 - Lupinus hintonii;quinolizidine alkaloids;alkaloid profile SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2002 ;57(3-4):243-247 6985 UI - 10252 AU - Torres LF AU - Karam SM AU - Wendling C AU - Chenard MP AU - Kershenobich D AU - Tomasetto C AU - Rio MC AD - CU Strasbourg, Inst Genet & Biol Mol & Cellulaire, IGBMC, F-67404 Illkirch Graffenstaden, FranceInst Nacl Ciencias Med & Nutr Salvador Zubiran, INCMNSZ, Dept Gastroenterol, Mexico City, DF, MexicoUnited Arab Emirates Univ, Fac Med & Hlth Sci, Dept Anat, Al Ain, U Arab EmiratesRio, MC, CU Strasbourg, Inst Genet & Biol Mol & Cellulaire, IGBMC, BP 10142, F-67404 Illkirch Graffenstaden, France TI - Trefoil factor 1 (TFF1/pS2) deficiency activates the unfolded protein response AB - Background: The trefoil factor 1 (TFF1/pS2) is a secreted gastrointestinal peptide that is often altered or lost in human gastric cancers. Consistently, mouse TFF1 deficiency leads to antropyloric tumors. Materials and Methods: To investigate the gene expression alterations in response to the lack of TFF1, we performed differential expression analyses of TFF1 null antropyloric tumors using an array containing 588 cDNAs. Results: Using total and enriched probes, 22 genes were found to be up-regulated. The identification of the genes for endoplasmic reticulum (ER)-resident GRP78, ERp72, and p58IPK proteins connected TFF1 deficiency to the unfolded protein response (UPR). Accordingly, CHOP10, a transcription factor induced early in response to ER stress, and the pleiotropic Clusterin, involved in protein folding, were also overexpressed. Northern blot analyses of 8 weeks and 1 year TFF1 null tumors confirmed that GRP78, ERp72, p58IPK, CHOP10, and Clusterin overexpression is a common and permanent feature shared by all TFF1 null antropyloric tumors. Finally, consistent with UPR, ultrastructural analyses showed that tumor rough ER was enlarged and contained dense material, supporting the hypothesis that TFF1 deficiency leads to the accumulation of misfolded proteins in the ER. Conclusion: Together, our data provide the first evidence of a relationship between a member of the TFF family and the ER machinery. Whereas to date TFF1 is believed to act as an extracellular molecule, our results suggest a possible additional function for TFF1 in protein folding and/or secretion MH - France MH - Mexico|Distrito Federal MH - U Arab Emirates PB - BALTIMORE: JOHNS HOPKINS UNIV PRESS RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Cell Biology;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1076-1551 UR - ISI:000178018100006 L2 - ENDOPLASMIC-RETICULUM; EPITHELIAL-CELLS; DIFFERENTIATED ADENOCARCINOMA; MATRIX METALLOPROTEINASES; SPASMOLYTIC POLYPEPTIDE; GASTRIC-CARCINOMA; NORMAL STOMACH; MICE LACKING; PEPTIDES; CANCER SO - Molecular Medicine 2002 ;8(5):273-282 6986 UI - 11127 AU - Torres M AU - Aragon JL AU - Dominguez P AU - Gil D AD - CSIC, Inst Fis Aplicada, Madrid 28006, SpainUNAM, Inst Fis, Queretaro 76000, MexicoUniv Complutense, Fac Ciencias Geol, Dept Paleontol, E-28040 Madrid, SpainNat Hist Museum, Dept Palaeontol, London SW7 5BD, EnglandTorres, M, CSIC, Inst Fis Aplicada, Serrano 144, Madrid 28006, Spain TI - Regularity in irregular echinoids AB - Using the mathematical concept of eutactic star, we prove that it is possible to define a morphospace for irregular echinoids by using a single parameter. In particular, we have found an extraordinary geometric property in the flower-like patterns of the five ambulacral petals of these animals. This property is fulfilled with great accuracy for a large collection of fossil specimens and provides new insights in the study of the viable skeletal designs of extinct and/or living organisms MH - United Kingdom MH - Mexico|Queretaro MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0303-6812 UR - ISI:000175598300003 L2 - pentamerism;irregular echinoids;ambulacral petals;morphospace;eutactic stars;QUASI-CRYSTALS; LATTICES SO - Journal of Mathematical Biology 2002 ;44(4):330-340 6987 UI - 10367 AU - Torres R AU - Cooke F AU - Robertson GJ AU - Boyd WS AD - Simon Fraser Univ, Dept Biol Sci, Burnaby, BC V5A 1S6, CanadaTorres, R, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Apartado Postal 70-275, Mexico City 4510, DF, Mexico TI - Pairing decisions in the Harlequin Duck: costs and benefits AB - In waterfowl, the male costs and female benefits hypothesis considers that the timing of pairing will depend on the balance between the costs and benefits for each sex. Females may benefit by increasing their access to food and social status, and by decreasing harassment from conspecifics, while maintaining a pair bond for a long period should be costly to males. To investigate costs and benefits of early pairing in the Harlequin Duck (Histrionicus histrionicus), we compared time budgets and frequency of interactions (agonistic, courtship, and mate guarding behavior) from paired and impaired males and females. A total of 400 thirty-minute focal-animal sampling sessions were used for the analysis. Overall, feeding time did not differ between paired and impaired birds of both sexes. However, regardless of their reproductive status, females spent about 15% more time feeding than males throughout the winter. While diving, paired males spent 4% less time underwater than impaired males, but no difference was found between paired and impaired females. Males spent more time on the surface between dives than females, yet the differences between paired and impaired birds were not significant. Paired males were engaged in more interactions (mainly mate guarding) than impaired males. Interactions received by paired and unpaired females did not differ overall, however, from late October to early May, interactions with paired females decreased, while interactions directed to impaired females increased. Thus the pair bond, though being apparently costly to males, did not obviously benefit females by increasing feeding time. Early pairing in the Harlequin Duck may result from other factors, such as the advantages that pair reunion may confer MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: WATERBIRD SOC RP - NOT IN FILE U3 - TC 5 U4 - Ornithology U5 - J;Article AV - English IS - 1524-4695 UR - ISI:000177616500009 L2 - foraging behavior;pair formation;Harlequin Duck;Histrionicus histrionicus;time budgets;AMERICAN BLACK DUCKS; REPRODUCTIVE-PERFORMANCE; WINTER PHILOPATRY; TIME; BONDS; AGE SO - Waterbirds 2002 ;25(3):340-347 6988 UI - 10342 AU - Tototzintle-Huitle H AU - Ramos-Mendoza A AU - Mendoza-Galvan A AU - Gonzalez-Hernandez J AU - Chao BS AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, MexicoEnergy Convers Devices Inc, Troy, MI 48084, USATototzintle-Huitle, H, IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Apartado Postal 1-798, Queretaro 76001, Mexico TI - The effect of the viscosity in the precursor solution on the structure of sol-gel derived silica films containing cobalt AB - Silica coatings containing cobalt have been prepared from sol-gel precursor solutions having a viscosity in the range of 3 to 40 cP. The different values of viscosity were achieved by aging the solutions with various amount of solvent (ethanol). The structure of these samples was analyzed using x-ray diffraction, Raman scattering, infrared absorption and Auger depth profiles. These measurements show that, upon heat treatments in air at 500degreesC, the cobalt oxidizes to form small oxide particles. However, when the coatings are prepared from precursor solutions with viscosity lower than about 9 cP, the cobalt migrates to the outer surface of the coating were it is oxidized to form the particles. On the other hand, if the coatings are prepared from solutions with a higher viscosity, the oxide particles are formed in the bulk of the coating. The infrared and Raman spectra indicate that the structure of this later set samples is more ordered with fewer amount of voids. (C) 2002 Kluwer Academic Publishers MH - Mexico|Queretaro MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000177822200020 L2 - CHEMICAL VAPOR-DEPOSITION; GLASS; TRANSMISSION; TRANSITION; HYDROLYSIS; RAMAN SO - Journal of Materials Science 2002 ;37(19):4211-4216 6989 UI - 12092 AU - Tovar-Rojo F AU - Chander M AU - Setlow B AU - Setlow P AD - Univ Connecticut, Ctr Hlth, Dept Biochem, Farmington, CT 06032, USAInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoSetlow, P, Univ Connecticut, Ctr Hlth, Dept Biochem, Farmington, CT 06032 USA TI - The products of the spoVA operon are involved in dipicolinic acid uptake into developing spores of Bacillus subtilis AB - Bacillus subtilis cells with mutations in the spoVA operon do not complete sporulation. However, a spoVA strain with mutations that remove all three of the spore's functional nutrient germinant receptors (termed the ger3 mutations) or the cortex lytic enzyme SleB (but not CwlJ) did complete sporulation. ger3 spoVA and sleB spoVA spores lack dipicolinic acid (DPA) and have lower core wet densities and levels of wet heat resistance than wild-type or ger3 spores. These properties of ger3 spoVA and sleB spot A spores are identical to those of ger3 spoVF and sleB spoVF spores that lack DPA due to deletion of the spot T operon coding for DPA synthetase. Sporulation in the presence of exogenous DPA restored DPA levels in ger3 spot T spores to 53% of the wild-type spore levels, but there was no incorporation of exogenous DPA into ger3 spoVA spores. These data indicate that one or more products of the spoVA operon are involved in DPA transport into the developing forespore during sporulation MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 26 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000173009700031 L2 - SPORULATION OPERON; GENE-EXPRESSION; GERMINATION; IDENTIFICATION; SEQUENCE; CLONING; PATTERN; SPOIIA SO - Journal of Bacteriology 2002 ;184(2):584-587 6990 UI - 11962 AU - Tovar D AU - Zambonino J AU - Cahu C AU - Gatesoupe FJ AU - Vazquez-Juarez R AU - Lesel R AD - CIBNOR SC, La Paz 23000, Baja Calif Sur, MexicoIFREMER, Unite Mixte INRA, Fish Nutr Lab, F-29280 Plouzane, FranceINRA, F-75338 Paris, FranceVazquez-Juarez, R, CIBNOR SC, POB 128, La Paz 23000, Baja Calif Sur, Mexico TI - Effect of live yeast incorporation in compound diet on digestive enzyme activity in sea bass (Dicentrarchus labrax) larvae AB - Yeasts produce polyamines, and some strains have a strong adhesion potential to intestinal mucus, an important condition for probiotic efficiency. The aim of this study was to explore an in situ production of polyamines by Debaryomyces hansenii HF1 (DH), a yeast strain isolated from fish gut, in comparison with Saccharomyces cerevisiae X2180 (SC) (Goteborg University Collection). The production of polyamines by DH was three times higher than that of SC. The main polyamines were spermine and spermidine, produced at a similar level. Both strains adhered to the gut of sea bass larvae. When the yeasts were introduced into a compound diet, the colonization was effective in the larvae (10(4) CFU g(-1) on a body weight basis). The DH diet led to an increase in amylase secretion in 27-day-old larvae in comparison with the control diet. The secretion of amylase and trypsin was lower in the SC diet, and some delay in trypsin secretion was still observed in this group at day 42. At day 27, the activity of brush border membrane enzymes was stimulated by the DH diet, and delayed by the SC diet, in comparison with the control diet. The survival of the larvae was also increased in the DH diet, but the growth rate was lower than that in the control group. This may be due to the introduction of live yeast into the diet, which needs to be optimised, (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000173501800010 L2 - polyamines;marine fish larvae;gut maturation;yeast adhesion;gut colonization;RAINBOW-TROUT; INTESTINAL MATURATION; SALMO-GAIRDNERI; BRUSH-BORDER; FISH; POLYAMINES; ASSAY; PANCREAS; SPERMINE; GROWTH SO - Aquaculture 2002 ;204(1-2):113-123 6991 UI - 11736 AU - Tovmassian HM AU - Yam O AU - Tiersch H AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoSternwarte Konigsleiten, D-81477 Munich, GermanyTovmassian, HM, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla 72000, Mexico TI - On the X-ray emission of the low-mass galaxy groups AB - It is shown that low-mass groups obey the L-x similar to sigma(v)(4) law deduced for galaxy clusters. The impression of the more shallow slope of the L-x-sigma(v) correlation for groups is created not by enhanced X-ray emission, but by the underestimation of the radial velocity dispersion of some groups MH - Germany MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000174047900008 L2 - galaxies : clusters : general;X-rays : galaxies;COMPACT-GROUPS; VELOCITY DISPERSION; CLUSTERS; LUMINOSITY SO - Astrophysical Journal 2002 ;567(1):L33-L35 6992 UI - 10576 AU - Toy C AU - Leung K AU - Alvarez L AU - Horowitz R AD - DiCon Fiberopt, Richmond, CA 94804, USAPhaethon Commun, Fremont, CA 94538, USAUniv Nacl Autonoma Mexico, Mexico City 04520, DF, MexicoUniv Calif Berkeley, Berkeley, CA 94720, USAToy, C, DiCon Fiberopt, Richmond, CA 94804, USA TI - Emergency vehicle maneuvers and control laws for automated highway systems AB - The operation and transit of emergency vehicles on an automated highway system (AHS) designed under the control architecture proposed in the California Partners for Advanced Transit and Highways (PATH) program is described. The term emergency vehicles is used in a general sense to describe vehicles, such as police cars, ambulances, and tow trucks, that may service faults inside or outside the AHS. The transit of emergency vehicles requires intensive participation of the coordination layer, which directs the interactions of neighboring vehicles, and the link layer, which regulates traffic flow along stretches of highway. Various strategies for these two hierarchical layers that are needed to assign high-priority transit to emergency vehicles (EVs) on the AHS are described. These coordination and link layer maneuvers circulate vehicles around the EV in both free-flowing and stopped traffic MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Civil;Engineering, Electrical & Electronic;Transportation Science & Technology U5 - J;Article AV - English IS - 1524-9050 UR - ISI:000177118400001 L2 - discrete event systems;hierarchical control systems;traffic flow control;vehicle control;TRAFFIC FLOW; MODEL; ROADS SO - Ieee Transactions on Intelligent Transportation Systems 2002 ;3(2):109-119 6993 UI - 11213 AU - Toy C AU - Alvarez L AU - Horowitz R AD - DiCon Fiberopt Inc, Richmond, CA 94804, USAUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USAToy, C, DiCon Fiberopt Inc, Richmond, CA 94804, USA TI - Nonstationary velocity profiles for emergency vehicles on automated highways AB - This paper explores the notion and usefulness of nonstationary velocity profiles,for high priority emergency vehicle transit on automated highways. These profiles are intended for use in the link layer of the hierarchical control architecture defined by the California Partners for Automated Transit and Highways (PATH) program. A non-stationary velocity profile which can be used to circulate traffic around a faster moving emergency vehicle is introduced, The effects on traffic flow are illustrated. A traffic flow controller that sustains nonstationary velocity profiles oil fully automated highways is designed. Controller stability is discussed stressing the usefulness of nonstationary velocity profiles in creating a moving area of low vehicle density. Simulation results obtained using SmartCap, a traffic flow, simulation program, demonstrate the fast circulation of an emergency vehicle in AHS while high traffic flow is maintained MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Instruments & Instrumentation U5 - J;Article AV - English IS - 0022-0434 UR - ISI:000175335800017 L2 - TRAFFIC FLOW; SYSTEMS; CONTROLLER; DESIGN SO - Journal of Dynamic Systems Measurement and Control-Transactions of the Asme 2002 ;124(1):133-140 6994 UI - 9731 AU - Trakhtenberg LI AU - Gerasimov GN AU - Aleksandrova LN AU - Potapov VK AD - Karpov Inst Phys Chem, State Sci Ctr Rus Fed, Moscow 103064, RussiaUniv Nacl Autonoma Mexico, Inst Invest Mat, Dept Polymeros, Mexico City 04510, DF, MexicoTrakhtenberg, LI, Karpov Inst Phys Chem, State Sci Ctr Rus Fed, 10 Vorontsovo Pole, Moscow 103064, Russia TI - Photo and radiation cryochemical synthesis of metal-polymer films: structure, sensor and catalytic properties AB - The novel radiation and photo-induced cryochemical solid-state synthesis of metal-polymer materials as well as the structure and physico-chemical properties of synthesized materials were described. The synthesis consists of low-temperature co-condensation of metal and monomer vapors followed by low-temperature solid-state polymerization of the co-condensate under irradiation. Depending on metal nature and monomer structure, this process allows to prepare specific metal-polymer systems: polymers containing organometallic units in polymer chains, metal-polymer complexes or stable metal clusters of various sizes trapped physically inside polymer matrix without coordination bonds between metal and polymer. The thermal treatment of synthesized systems leads to the formation of novel nanocomposite metal-polymer materials characterized by specific electric sensor and magnetic properties, catalytic activity and dielectric anomalies, which are discussed in relation to material structure. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000179423200024 L2 - cryochemical solid-state synthesis;metal-polymer films;nanocrystals;PARTICLES SO - Radiation Physics and Chemistry 2002 ;65(4-5):479-485 6995 UI - 10718 AU - Travis JC AU - Zwinkels JC AU - Mercader F AU - Ruiz A AU - Early EA AU - Smith MV AU - Noel M AU - Maley M AU - Kramer GW AU - Eckerle KL AU - Duewer DL AD - NIST, Chem Sci & Technol Lab, Gaithersburg, MD 20899, USANatl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, CanadaCtr Nacl Metrol, Div Met, Queretaro 76900, MexicoCtr Nacl Metrol, Opt & Radiometr Div, Queretaro 76900, MexicoNIST, Phys Lab, Gaithersburg, MD 20899, USADuewer, DL, NIST, Chem Sci & Technol Lab, Gaithersburg, MD 20899, USA TI - An international evaluation of holmium oxide solution reference materials for wavelength calibration in molecular absorption spectrophotometry AB - Commercial spectrophotometers typically use absorption-based wavelength calibration reference materials to provide wavelength accuracy for their applications. Low-mass fractions of holmium oxide (Ho2O3) in dilute acidic aqueous solution and in glass matrixes have been favored for use as wavelength calibration materials on the basis of spectral coverage and absorption band shape. Both aqueous and glass Ho2O3 reference materials are available commercially and through various National Metrology Institutes (NMIs). Three NMIs of the North American Cooperation in Metrology (NORAMET) have evaluated the performance of Ho3+(aq)-based Certified Reference Materials (CRMs) under "routine" operating conditions using commercial instrumentation. The study was not intended to intercompare national wavelength scales but to demonstrate comparability of wavelength measurements among the participants and between two versions of the CRMs. It was also designed to acquire data from a variety of spectrophotometers for use in a NIST study of wavelength assignment algorithms and to provide a basis for a possible reassessment of NIST-certified Ho3+(aq) band locations. The resulting data show a substantial level of agreement among laboratories, instruments, CRM preparations, and peak-location algorithms. At the same time, it is demonstrated that the wavelength comparability of the five participating instruments can actually be improved by calibrating all of the instruments to the consensus Ho3+(aq) band locations. This finding supports the value ofabsorption-based wavelength standards for calibrating absorption spectrophotometers. Coupled with the demonstrated robustness of the band position values with respect to preparation and measurement conditions, it also supports the concept of extending the present approach to additional NMIs in order to certify properly prepared dilute acidic Ho2O3 solution as an intrinsic wavelength standard MH - Canada MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2700 UR - ISI:000176846200022 SO - Analytical Chemistry 2002 ;74(14):3408-3415 6996 UI - 11726 AU - Trejo R AU - Kreinovich V AU - Goodman IR AU - Martinez J AU - Gonzalez R AD - Univ Texas, Dept Comp Sci, El Paso, TX 79968, USAITESM Inst Technol Monterrey, Div Ingn & Ciencias, Atizapan 52926, MexicoSpace & Naval Warfare Syst Ctr, San Diego, CA 92152, USAKreinovich, V, Univ Texas, Dept Comp Sci, El Paso, TX 79968, USA TI - A realistic (non-associative) logic and a possible explanations of 7 +/- 2 law AB - When we know the subjective probabilities (degrees of belief) p(1) and p(2) of two statements S-1 and S-2, and we have no information about the relationship between these statements, then the probability of S-1 &S-2 can take any value from the interval [max(p(1) + p(2) - 1, 0), min(p(1), p(2))]. If we must select a single number from this interval, the natural idea is to take its midpoint. The corresponding "and" operation p(1) & p(2) (def) double under bar (1/2) (max(p(1) + p(2) - 1, 0) + min(p(1), p(2))) is not associative. However, since the largest possible non-associativity degree \ (a & b) & c - a & (b & c) \ is equal to 1/9, this non-associativity is negligible if the realistic "granular" degree of belief have granules of width greater than or equal to 1/9. This may explain why humans are most comfortable with less than or equal to 9 items to choose from (the famous" 7 plus or minus 2" law). We also show that the use of interval computations can simplify the (rather complicated) proofs. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0888-613X UR - ISI:000174101000002 L2 - NONSPECIFIC EVIDENCE; PROBABILITY; BELIEF SO - International Journal of Approximate Reasoning 2002 ;29(3):235-266 6997 UI - 11410 AU - Trigo-Stockli DM AU - Cortez-Rocha MO AU - Sanchez-Marinez RI AU - Reed CR AD - Kansas State Univ, Dept Grain Sci & Ind, Manhattan, KS 66506, USAUniv Sonora, Dept Food Sci, Hermosillo 83000, Sonora, MexicoCortez-Rocha, MO, Kansas State Univ, Dept Grain Sci & Ind, 201 Shellenberger Hall, Manhattan, KS 66506 USA TI - Fumonisin B-1 levels in 1995 and 1996 Kansas corn MH - USA MH - Mexico|Sonora PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000174941800015 L2 - FUSARIUM; CONTAMINATION SO - Bulletin of Environmental Contamination and Toxicology 2002 ;68(5):720-724 6998 UI - 9177 AU - Trinidad MA AU - Curiel S AU - Canto J AU - Torrelles JM AU - Rodriguez LF AU - Gomez JF AU - Ho PTP AD - UNAM, Inst Astron, Mexico City 04510, DF, Mexico. CSIC, IEEC, E-08034 Barcelona, Spain. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. UNAM, Inst Astron, Morelia 58089, Michoacan, Mexico. INTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USA TI - Observations of H2O maser and continuum emission in AFGL 2591 AB - We report results of radio continuum (1.3 and 3.6 cm) and H2O maser line observations, made with the Very Large Array (A configuration), toward the star-forming region AFGL 2591. We detected 85 maser spots toward this region, which are distributed in three main groups. Two of these groups spatially coincide with the radio continuum sources VLA 2 and VLA 3. The maser spots associated with VLA 3 are distributed along a shell-like structure of 0."01 and nearly perpendicular to the CO bipolar outflow. We propose that VLA 3 is the center of the observed molecular flow in this region. Finally, we confirm that AFGL 2591 region is a cluster of B type stars, each one with its own optically thin H II region MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - USA T3 - COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLESIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBW16P AV - English IS - 0074-1809 UR - ISI:000181054300013 SO - 2002 ;(206):68-71 6999 UI - 9464 AU - Tripathi SC AU - Sayre KD AU - Kaul JN AU - Narang RS AD - DWR, Karnal 132001, Haryana, IndiaCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoPunjab Agr Univ, Dept Agron, Ludhiana 141004, Punjab, IndiaTripathi, SC, DWR, PB 158, Karnal 132001, Haryana, India TI - Effect of planting methods and N rates on lodging, morphological characters of culm and yield in spring wheat varieties AB - The aim of the investigation was to test high yielding spring wheat varieties under different N rates and planting methods for characterizing the lodging resistance parameters and enhancing the yield by reducing lodging. Bed planting increased stem weight (8.1 %), spike weight (7.2 %), diameter of first (3.8 %), second (7.1 %), third (8.2 %) internode and peduncle (9.0 %) as compared to flat planted crop and this lead to 70-75 % reduction in lodging score. Raising on beds also gave significantly higher biomass (18.48 t/ha), grain yield (8.75 t/ha), thousand grain weight (41.1 g), grains/spike (42) and grains/m(2) (19154) as compared to other planting methods, despite lodging during last irrigation (25-30 days after anthesis). On the other hand, grain yield under permanent bed system (non-tilled during last five years) was 28 % lesser than bed planting due to 25-30 % reduction in spikes/m(2) and grains/m(2). Effect of N rates on yield and morphological parameters was at par due to recommended or higher N use besides green manuring. Baviacora 92 produced significantly higher biomass (171 t/ha), grain yield (8.5 t/ha) and had significantly higher stem and spike weight, diameter and stem wall thickness of different internodes than other varieties. It also recorded 7 % higher grain yield with bed planting (9.5 t/ha) as compared to flat planting (8.8 t/ha). Since this variety didn't lodge in either planting system therefore it could be said that increase in yield was due to planting on beds. So, it can be said that wheat growing on beds reduces lodging by way of more vigorous stem development and enables to exploit potential yield MH - India MH - Mexico|Distrito Federal PB - SZEGED: CEREAL RES INST RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0133-3720 UR - ISI:000180339400027 L2 - NEW-SOUTH-WALES; SPACING INFLUENCE; IRRIGATED WHEAT; SOWING DATE; GROWTH; NITROGEN; GENOTYPE SO - Cereal Research Communications 2002 ;30(3-4):431-438 7000 UI - 11491 AU - Trubert D AU - Le Naour C AU - Guzman FM AU - Hussonnois M AU - Brillard L AU - Le Du JF AU - Constantinescu O AU - Gasparro J AU - Barci V AU - Weiss B AU - Ardisson G AD - UPS, IN2P3, CNRS, Inst Phys Nucl, F-91406 Orsay, FranceININ, Carretera Mexico Toluca, Ocoyoacac 52045, Estado De Mexic, MexicoJoint Inst Nucl Res, Flerov Lab Nucl React, Dubna 141980, RussiaUniv Nice, Lab Radiochim, F-06034 Nice, FranceTrubert, D, UPS, IN2P3, CNRS, Inst Phys Nucl, F-91406 Orsay, France TI - Chemical isolation of dubnium (element 105) in fluoride media AB - The isotope (262)Db was produced by irradiation of a Cm-248 target with 106-MeV F-19 ions at the 15 MV NIP Tandem accelerator of Orsay (France). The reaction products were continuously and rapidly transported with a KC1 aerosol helium jet system to the chemistry setup. They were dissolved in HF medium and the solution was passed through three successive ion exchange columns, allowing a continuous high level purification of Db from actinides on a first cation exchange column, the isolation of Db on an anion exchange one, and the retention of the long-lived decay products of (262)Db (3.24 h-(254) Fm) on a second cation exchange column. Just after the end of irradiation, the decay products were desorbed from this column, purified and a-sources were prepared on carbon foil by electrospray. In 13 effective irradiation hours, 22 events corresponding to the alpha-decay of Fm-254 were recorded. Almost 70 atoms of (262)Db, produced in the reaction Cm-248 + F-19 were isolated in dilute HF medium. Like its homologues/analogues Nb, Ta and Pa, dubnium forms, with fluoride ions, negatively charged complexes which are strongly retained on anion exchanger MH - France MH - Mexico|Estado De Mexico MH - Russia PB - MUNICH: R OLDENBOURG VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0033-8230 UR - ISI:000174655300002 L2 - element 105;dubnium;fluoride;ion exchange chromatography;AQUEOUS-SOLUTION; CHEMISTRY; AMINE; HF; EXTRACTION; SEPARATION; EXCHANGE; BEHAVIOR; HCL; ZR SO - Radiochimica Acta 2002 ;90(3):127-132 7001 UI - 10884 AU - Tsukamoto T AU - Ando T AU - Watanabe H AU - Kokubun H AU - Hashimoto G AU - Sakazaki U AU - Suarez E AU - Marchesi E AU - Oyama K AU - Kao TH AD - Chiba Univ, Fac Hort, Chiba 2718510, JapanCtr Pesquisas Hist Nat, Sao Paulo, BrazilInst Nacl Tecnol Agropecuaria, Ctr Invest Recursos Nat, Castelar, ArgentinaUniv Republica, Fac Agron, Montevideo, UruguayUNAM, Inst Ecol, Michoacan, MexicoPenn State Univ, Dept Biochem & Mol Biol, University Pk, PA 16802, USAAndo, T, Chiba Univ, Fac Hort, 648 Matsudo, Chiba 2718510, Japan TI - Differentiation in the status of self-incompatibility among Calibrachoa species (Solanaceae) AB - The overall status of self-incompatibility, as assessed by the rate of capsule-set after self-pollination, was investigated in the genus Calibrachoa (Solanaceae). Thirty-two species were surveyed using a total of 655 individuals collected in 102 different native populations in Argentina, Brazil, Mexico, and Uruguay. The rate of capsule-set in 278 voucher specimens collected from the same native habitats was also measured to obtain additional information to assess the degree of self-(in)compatibility. Only one species, Calibrachoa parviflora, was self-compatible (SC, autogamous) and the other 31 species, were found to be self-incompatible (SI). A mixed population (SI and SC individuals in the same population) was not found. The differentiation of C parviflora as an autogamous species is associated with a successful occupation of different (riparian) habitats within a larger range of geographic distribution compared to the rest of the species in the principally SI genus of Calibrachoa MH - Argentina MH - Brazil MH - Japan MH - Mexico|Michoacan MH - Uruguay MH - USA PB - TOKYO: SPRINGER-VERLAG TOKYO RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0918-9440 UR - ISI:000176356000004 L2 - autogamy;Calibrachoa;Petunia;selfincompatibility;Solanaceae;South America;SENSU JUSSIEU SOLANACEAE; PETUNIA; INTERRELATIONSHIPS; TAXA SO - Journal of Plant Research 2002 ;115(1119):185-193 7002 UI - 10935 AU - Tulyaganov DU AU - Tukhtaev ME AU - Escalante JI AU - Ribeiro MJ AU - Labrincha JA AD - Univ Aveiro, UMIC, Ceram & Glass Engn Dept, P-3810193 Aveiro, PortugalInst Chem Technol, Tashkent 700000, UzbekistanCtr Res Adv Studies, Saltillo, Coahuila, MexicoPolytech Inst Viana Do Castelo, ESTG, P-4900 Viana Do Castelo, PortugalLabrincha, JA, Univ Aveiro, UMIC, Ceram & Glass Engn Dept, P-3810193 Aveiro, Portugal TI - Processing of cordierite based ceramics from alkaline-earth-aluminosilicate glass, kaolin, alumina and magnesite AB - Microstructural changes, porosity evolution and properties of cordierite based composites have been studied as a function of cordierite-anorthite ratio in modelled ceramic systems. The model systems were composed of alkaline-earth-aluminosilicate glass powder, kaolin, alumina and magnesite. Suitable densification levels of investigated compositions are attained in a narrow temperature range and relatively high residual porosity levels are observed. These features were attributed to the role of the liquid phase during high temperature sintering. Cordierite, anorthite or mixtures of each with mullite are the formed crystalline phases when maximum densification levels are achieved. Their properties are correlated to the processing route and to the composition of sintered materials. Control of the porous structure through manipulation of heating rate was found feasible and easy to implement. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Portugal MH - Uzbekistan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000176143900006 L2 - anorthite;cordierite;glass ceramics;microstructure-final;mullite;porosity;sintering SO - Journal of the European Ceramic Society 2002 ;22(11):1775-1782 7003 UI - 7131 AU - Turati M AU - Quiroz-Mercado H AU - Guerro-Naranjo JL AU - Yesthurun I AU - Garcia-Aguirre G AU - Morfin L AU - Koch F AD - Univ Frankfurt, D-6000 Frankfurt, GermanyAPEC, Mexico City, DF, Mexico TI - Viscoelastic foveal detachment and endoscopic subretinal laser photocoagulation of subfoveal choroidal neovascularization MH - Germany MH - Mexico|Distrito Federal PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606602457 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U594-U594 7004 UI - 11752 AU - Turbat-Herrera EA AU - Dempsey S AU - Dominguez-Malagon H AU - Herrera GA AU - Unger J AU - Matthews-Greer J AD - Overton Brooks VA Med Ctr, Dept Lab Med & Pathol, Shreveport, LA, USALouisiana State Univ, Hlth Sci Ctr, Dept Pathol, Shreveport, LA 71105, USAInst Cancerol, Dept Patol, Mexico City, DF, MexicoLouisiana State Univ, Hlth Sci Ctr, Dept Obstet & Gynecol, Shreveport, LA 71105, USA TI - Unusual cervical carcinomas of Mexican women: HPV yypes by PCR and line blot analysis MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000173388900379 SO - Modern Pathology 2002 ;15(1):89A-89A 7005 UI - 11754 AU - Turbat-Herrera EA AU - Dempsey S AU - Dominguez-Malagon H AU - Herrera GA AU - Unger J AU - Matthews-Greer J AD - Overton Brooks VA Med Ctr, Dept Lab Med & Pathol, Shreveport, LA, USALouisiana State Univ, Dept Pathol, Hlth Sci Ctr, Shreveport, LA 71105, USALouisiana State Univ, Dept Obstet & Gynecol, Hlth Sci Ctr, Shreveport, LA 71105, USAInst Cancerol, Dept Patol, Mexico City, DF, Mexico TI - Unusual cervical carcinomas of Mexican women: HPV yypes by PCR and line blot analysis MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000173379700375 SO - Laboratory Investigation 2002 ;82(1):89A-89A 7006 UI - 10674 AU - Turbiner AV AD - Univ Paris 11, Lab Phys Theor, F-91405 Orsay, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoTurbiner, AV, Univ Paris 11, Lab Phys Theor, Batiment 211, F-91405 Orsay, France TI - Quantum many-body problems and perturbation theory AB - We show that the existence of algebraic forms of exactly solvable A-B-C-D, G(2), and F-4 Olshanetsky-Perelomov Hamiltonians allows one to develop algebraic perturbation theory, where corrections are computed by purely algebraic means. A classification of perturbations leading to such a perturbation theory based on the theory of representations of Lie algebras is given. In particular, this scheme admits an explicit study of anharmonic many-body problems. Some examples are presented. (C) 2002 MAIK "Nauka/Interperiodica" MH - France MH - Mexico|Distrito Federal PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7788 UR - ISI:000176784500031 L2 - SUTHERLAND MODELS; LIE-ALGEBRAS; SOLVABILITY; CALOGERO SO - Physics of Atomic Nuclei 2002 ;65(6):1135-1143 7007 UI - 11387 AU - Tutor-Sanchez J AU - Hernandez-Calderon I AU - Leite JR AD - Univ Havana, IMRE, Havana, CubaIPN, CINVESTAV, Dept Phys, Mexico City 07738, DF, MexicoUniv Sao Paulo, Inst Phys, Sao Paulo, BrazilLeite, JR, Univ Havana, IMRE, Havana, Cuba TI - Semiconductor nanostructures: Micro and opteoelectronics applications - Preface MH - Brazil MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Editorial Material AV - English IS - 0026-2692 UR - ISI:000174933200001 SO - Microelectronics Journal 2002 ;33(4):311-311 7008 UI - 9231 AU - Twohy CH AU - Clement CF AU - Gandrud BW AU - Weinheimer AJ AU - Campos TL AU - Baumgardner D AU - Brune WH AU - Faloona I AU - Sachse GW AU - Vay SA AU - Tan D AD - Oregon State Univ, Coll Oceanog, Corvallis, OR 97331, USANatl Ctr Atmospher Res, Boulder, CO 80303, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoPenn State Univ, Dept Meteorol, University Pk, PA 16802, USANASA, Langley Res Ctr, Hampton, VA 23681, USAGeorgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332, USATwohy, CH, Oregon State Univ, Coll Oceanog, Oceanog Adm Bldg 104, Corvallis, OR 97331 USA TI - Deep convection as a source of new particles in the midlatitude upper troposphere AB - [1] A case study of new particle formation in the region downwind of a mesoscale convective system stretching across much of the central United States is presented. Airborne measurements were made of condensation nuclei (CN), cloud particle surface area, water vapor, and other gases. CN concentrations were greatly enhanced above and downwind of the cirrus anvil, with maximum concentrations of 45,000 per standard cm(3). Volatility and electron microscope measurements indicated that most of the particles were likely to be small sulfate particles. The enhancement extended over at least a 600-km region. Multivariate statistical analysis revealed that high CN concentrations were associated with surface tracers, as well as convective elements. Convection apparently brings gas-phase particle precursors from the surface to the storm outflow region, where particle nucleation is favored by the extremely low temperatures. Simple calculations showed that deep convective systems may contribute to a substantial portion of the background aerosol in the upper troposphere at midlatitudes MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 15 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0747-7309 UR - ISI:000180860300012 L2 - particles;aerosols;sulfuric acid;nucleation;cirrus clouds;convection;MARINE BOUNDARY-LAYER; CONDENSATION NUCLEUS COUNTER; ATMOSPHERIC NUCLEI; AEROSOL-PARTICLES; SIZE DISTRIBUTION; CUMULUS CLOUDS; HOMOGENEOUS NUCLEATION; OPTICAL-PROPERTIES; EMISSION INDEXES; DIMETHYL SULFIDE SO - Journal of Geophysical Research-Atmospheres 2002 ;107(D21): 7009 UI - 9786 AU - Uc VH AU - Hernandez-Laguna A AU - Grand A AU - Vivier-Bunge A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCSIC, Estac Expt Zaidin, E-18008 Granada, SpainCEA Grenoble, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble, FranceUc, VH, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico TI - Isomeric adduct stability in the addition of atomic radicals to toluene: H, O(P-3), F and Cl AB - In recent work we have found that, in the case of the OH addition to toluene, ipso addition may be important. Moreover, quite different values were calculated for several of the EPR coupling constants of the different adduct isomers, suggesting that electron paramagnetic resonance measurements could provide decisive information on the selectivity of the OH radical addition reaction to toluene. In this work, the reaction of the atomic radicals, H, O(P-3), F and Cl with toluene has been studied using ab initio theoretical methods to compare the stability of the isomeric adducts and to predict their expected hyperfine coupling constants. Ipso addition is found to be favored only for fluorine, although the ipso and ortho isomers have very similar energies for oxygen and chlorine. Ipso adducts are expected to contribute nonnegligibly in all cases MH - France MH - Mexico|Distrito Federal MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000179237500004 L2 - GAS-PHASE; ATMOSPHERIC OXIDATION; MECHANISM; OH; KINETICS; EXCHANGE; BENZENE SO - Physical Chemistry Chemical Physics 2002 ;4(23):5730-5738 7010 UI - 11096 AU - Ueda Y AU - Yamaoka K AU - Sanchez-Fernandez C AU - Dhawan V AU - Chaty S AU - Grove JE AU - McCollough M AU - Castro-Tirado AJ AU - Mirabel F AU - Kohno K AU - Feroci M AU - Casella P AU - Trushkin SA AU - Castaneda H AU - Rodriguez J AU - Durouchoux P AU - Ebisawa K AU - Kotani T AU - Swank J AU - Inoue H AD - Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, JapanRIKEN, Inst Phys & Chem Res, Wako, Saitama 35101, JapanINTA, LAEFF, Madrid, SpainNatl Radio Astron Observ, Charlottesville, VA 22903, USAOpen Univ, Dept Phys & Astron, Milton Keynes, Bucks, EnglandUSN, Res Lab, Washington, DC 20375, USANASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812, USACSIC, IAA, Granada, SpainServ Astrophys, Saclay, FranceConsejo Nacl Invest Cient & Tecn, IAFE, RA-1033 Buenos Aires, DF, ArgentinaNAO, Nobeyama Radio Observ, Nagano, JapanUniv Tokyo, Inst Astron, Tokyo 113, JapanCNR, Ist Astrofis Spaziale, I-00185 Rome, ItalySAO, St Petersburg, RussiaObserv Astron Nacl Mexico, Mexico City, DF, MexicoNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUeda, Y, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan TI - Study of the largest multiwavelength campaign of the microquasar GRS 1915+105 AB - We present the results from a multiwavelength campaign of GRS 1915+105 performed from 2000 April 16 to April 25. This is one of the largest coordinated set of observations ever performed for this source, covering the wide energy band in radio (13.3-0.3 cm), near-infrared (J, H, and K bands), X-rays, and gamma rays (from 1 keV to 10 MeV). During the campaign GRS 1915+105 was predominantly in the plateau (or low/hard) state but sometimes showed soft X-ray oscillations: before April 20.3, rapid, quasi-periodic (similar or equal to45 minutes) flare-dip cycles were observed. In the spectral energy distribution in the plateau state, optically thick synchrotron emission and Comptonization is dominant in the radio and X- to gamma-ray bands, respectively. The small luminosity in the radio band relative to that in X-rays indicates that GRS 1915+105 falls in the regime of "radio-quiet" microquasars. In three epochs we detected faint flares in the radio or infrared bands with amplitudes of 10-20 mJy. The radio flares observed on April 17 shows frequency-dependent peak delay, consistent with an expansion of synchrotron-emitting region starting at the transition from the hard-dip to the soft-flare states in X-rays. On the other hand, infrared flares on April 20 appear to follow (or precede) the beginning of X-ray oscillations with an inconstant time delay of similar or equal to5-30 minutes. This implies that the infrared-emitting region is located far from the black hole by greater than or similar to10(13) cm, while its size is less than or similar to10(12) cm constrained from the time variability. We find a good correlation between the quasi-steady flux level in the near-infrared band and in the X-ray band. From this we estimate that the reprocessing of X-rays, probably occurring in the outer parts of the accretion disk, accounts for about 20%-30% of the observed K magnitude in the plateau state. The OSSE spectrum in the 0.05-10 MeV band is represented by a single power law with a photon index of 3.1 extending to similar to1 MeV with no cutoff. We can model the combined GIS-PCA-HEXTE spectra covering 1 200 keV by a sum of the multicolor disk model, a broken power law modified with a high-energy cutoff, and a reflection component. The power-law slope above similar to30 keV is found to be very similar between different states in spite of large flux variations in soft X- rays, implying that the electron energy distribution is not affected by the change of the state in the accretion disk MH - Argentina MH - United Kingdom MH - France MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Russia MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175830800029 L2 - accretion, accretion disks;black hole physics;infrared : stars;radio continuum : stars;stars : individual (GRS 1915+105);X-rays : individual ( GRS 1915+105) X-rays : stars;SUPERLUMINAL SOURCE GRS-1915+105; BLACK-HOLE CANDIDATES; RAY TIMING EXPLORER; X-RAY; RELATIVISTIC JETS; INFRARED FLARES; RADIO-EMISSION; PERFORMANCE; OUTBURST; GALAXY SO - Astrophysical Journal 2002 ;571(2):918-935 7011 UI - 10654 AU - Ulloa-Aguirre A AU - Nayudu P AD - IMSS, Res Unit Reprod Med, Mexico City, DF, MexicoGerman Primate Ctr, Dept Reprod Biol, Gottingen, Germany TI - In vitro and in vivo effects of the human follicle-stimulating hormone isoforms MH - Germany MH - Mexico|Distrito Federal PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000176561900019 SO - Biology of Reproduction 2002 ;66():76-77 7012 UI - 9754 AU - Unsworth M AU - Enriquez OC AU - Belmonte S AU - Arzate J AU - Bedrosian P AD - Univ Alberta, Dept Phys, Inst Geophys Res, Edmonton, AB T6G 2J1, CanadaUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoInst Politecn Nacl, CIIDIR Oaxaca, Xoxocotlan 71230, Oaxaca, MexicoUniv Nacl Autonoma Mexico, UNICIT UNAM, Queretaro, MexicoUniv Washington, Dept Earth & Space Sci, Seattle, WA 98195, USAUnsworth, M, Univ Alberta, Dept Phys, Inst Geophys Res, Edmonton, AB T6G 2J1, Canada TI - Crustal structure of the Chicxulub Impact crater imaged with magnetotelluric exploration AB - The electrical resistivity structure of the Chicxulub Impact crater has been imaged using broadband magnetotelluric exploration. A 1-2 km thick sequence of conductive Tertiary sedimentary rocks was imaged within the crater. The shallow resistivity of this layer increases across the cenote ring. This is primarily due to a decrease in porosity, although the groundwater composition may have some effect. While this layer reduces the sensitivity of MT, several features can be discerned beneath it. In the center of the crater the structural high is imaged as a region of high resistivity. In the outer part of the crater, lower resistivities in the upper crust may be due to mineralization or hydrothermal alteration MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Oaxaca MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000179632700001 L2 - SIZE; GRADIENTS; CENOTES; YUCATAN SO - Geophysical Research Letters 2002 ;29(16): 7013 UI - 9461 AU - Urena-Lopez LA AU - Matos T AU - Becerril R AD - Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, EnglandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUrena-Lopez, LA, Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England TI - Inside oscillatons AB - Non-singular self-gravitating objects can be found by solving the coupled Einstein-Klein-Gordon (EKG) equations for a real scalar field. Such objects are generically known as oscillatons, in which the scalar field and the metric are fully time-dependent. In this paper, we describe a numerical procedure to minimize the nonlinearities present in the EKG equations, in the case of spherical symmetry, which permits us to find accurate numerical solutions. In order to gain physical insight of relativistic oscillatons, we study oscillatons in flat space, in the weak field limit, the so-called Newtonian oscillatons, using a fixed Schwarzschild background. This last case may be related to the ejected scalar field during a gravitational collapse of, scalar field configurations MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000180197300022 L2 - SCHRODINGER-NEWTON EQUATIONS; TIME PHASE-TRANSITION; DARK-MATTER; BOSON STARS; SOLITON STARS; GALACTIC HALO; QUINTESSENCE; EVOLUTION; LIQUID SO - Classical and Quantum Gravity 2002 ;19(23):6259-6277 7014 UI - 10273 AU - Urrea CA AU - Horsley RD AU - Steffenson BJ AU - Schwarz PB AD - N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105, USACIMMYT, Mexico City 06600, DF, MexicoDept Plant Pathol, St Paul, MN 55108, USAN Dakota State Univ, Dept Cereal & Food Sci, Fargo, ND 58105, USAHorsley, RD, N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105, USA TI - Heritability of fusarium head blight resistance and deoxynivalenol accumulation from barley accession CIho 4196 AB - Fusarium head blight (FHB) incited by Fusarium graminearum Schwabe [telomorph Gibberella zea (Schwein)], has caused devastating losses to yield and quality of barley (Hordeum vulgare L.) produced in the upper U.S. Midwest from 1993 to 2000. Design of an efficient breeding strategy for developing FHB resistant cultivars is dependent on knowing (i) the heritability of FHB resistance and accumulation of deoxynivalenol (DON), a mycotoxin contaminant produced by F. graminearum and (ii) the correlated response of other traits during selection for reduced FHB. We conducted field studies in FHB disease nurseries using F-4:5 and F-4:6 families from the cross between the FHB susceptible six-rowed cultivar Foster and the resistant two-rowed accession CIho 4196 to gain knowledge in the areas listed above. Heritability of FHB severity and DON accumulation was 0.65 and 0.46, respectively. A moderately strong positive association between FHB severity and DON accumulation was observed (r = 0.62). FHB severity and DON accumulation were negatively associated with plant height, days to heading, spike angle, and spike density. The selection differentials calculated between the top F-4:6 families selected for low FHB severity and the unselected F-4:5 families were moderately high for FHB severity, DON accumulation, and days to heading. Less than 14% of the selected lines had six-rowed spikes. No difference in plant height was observed between the selected and unselected families. Thus, development of FHB resistant lines with acceptable DON accumulation and days to heading is obtainable. However, because no lines were as short as Foster, development of FHB resistant plants with acceptable plant height from a cross using CIho 4196 as a parent will be difficult MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 14 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000177928000002 L2 - QUANTITATIVE TRAIT LOCI; HEIGHT; WHEAT SO - Crop Science 2002 ;42(5):1404-1408 7015 UI - 11732 AU - Urrea CA AU - Horsley RD AU - Steffenson BJ AU - Frankowiak JD AD - N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105, USACIMMYT, Mexico City 06600, DF, MexicoUniv Minnesota, Dept Plant Pathol, St Paul, MN 55108, USAHorsley, RD, N Dakota State Univ, Dept Plant Sci, Fargo, ND 58105, USA TI - Registration of 6NDRFG-1 six-rowed barley germplasm line with partial fusarium head blight resistance MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000174093500069 SO - Crop Science 2002 ;42(2):675-675 7016 UI - 11370 AU - Utkin V AU - Castillo-Toledo B AU - Loukianov A AU - Espinosa-Guerra O AD - Ohio State Univ, Dept Elect Engn, Columbus, OH 43210, USAIPN, Ctr Invest & Estudios Avanzados, Guadalajara 44550, Jalisco, MexicoUtkin, V, Ohio State Univ, Dept Elect Engn, Columbus, OH 43210, USA TI - On robust VSS Nonlinear servomechanism problem AB - Analogously to the formulation of the so-called classical servomechanism problem, the. problem of tracking a reference signal while rejecting the effect of a disturbance signal by means of the VSS technique is studied by formulating the sliding mode servomechanism problem for which conditions for the existence of a solution for in general case and for a classes of nonlinear system presented in the Regular Form or in the Nonlinear Block Controllable Form are derived. The effectiveness of the proposed method is demonstrated by the application to the Pendubot system MH - Mexico|Jalisco MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Computer Science, Information Systems U5 - S;Article AV - English IS - 0170-8643 UR - ISI:000175049900014 L2 - OUTPUT REGULATION; SYSTEMS SO - Variable Structure Systems: Towards the 21St Century 2002 ;274():343-363 7017 UI - 9249 AU - Vachard D AU - de Dios AF AD - Univ Sci & Tech Lille Flandres Artois, CNRS, UMR 8014, F-59655 Villeneuve Dascq, FranceUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Guerreo, MexicoVachard, D, Univ Sci & Tech Lille Flandres Artois, CNRS, UMR 8014, F-59655 Villeneuve Dascq, France TI - Discovery of Latest Devonian/Earliest Mississippian microfossils in San Salvador Patlanoaya (Puebla, Mexico); biogeographic and geodynamic consequences AB - Carbonate microfossils Petschoria (?), Kettnerammina, Kamaena, and Tolypammina (?) allow to biostratigraphically date the base of the sedimentary cover in San Salvador Patlanoaya (Puebla State, Mexico). They are indicative of the former Tournaisian, i.e. the Latest Devonian (Strunian) and the Earliest Mississippian Kinderhookian (= Hastarian). Deposits of this period are very poorly known in Mexico, and appear to be confined to a rift affecting only Patlanoaya, some areas of the Sonora and Chihuahua states (Mexico) and the Pedregosa Basin (New Mexico, USA). This rift is connected with the Rheic Ocean that opens, whereas the Antler Ocean is probably entirely closed in this period, as confirmed by the microfossil migration ways. (C) 2002 Academie des sciences / Editions scientifiques et medicales Elsevier SAS MH - France MH - Mexico|Guerrero PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1631-0713 UR - ISI:000180920400005 L2 - Latest Devonian;Earliest Mississippian;biostratigraphy;microproblematica;palaeogeography;Mexico;FUSULINIDS SO - Comptes Rendus Geoscience 2002 ;334(15):1095-1101 7018 UI - 9617 AU - Vacher H AU - Alami M AU - Crest M AU - Possani LD AU - Bougis PE AU - Martin-Eauclaire MF AD - Univ Mediterranee, CNRS, Fac Med Secteur Nord, UMR 6560,IFR Jean Roche, F-13916 Marseille 20, FranceUniv Mediterranee, CNRS, Fac Med Secteur Nord, UMR 6150,IFR Jean Roche, F-13916 Marseille, FranceInst Pasteur Maroc, Casablanca, MoroccoUNAM, Inst Biotechnol, Cuernavaca, Morelos, MexicoMartin-Eauclaire, MF, Univ Mediterranee, CNRS, Fac Med Secteur Nord, UMR 6560,IFR Jean Roche, Bd Pierre Dramard, F-13916 Marseille 20, France TI - Expanding the scorpion toxin alpha-KTX 15 family with AmmTX3 from Androctonus mauretanicus AB - A novel toxin, AmmTX3 (3823.5 Da), was isolated from the venom of the scorpion Androctonus mauretanicus . It showed 94% sequence homology with Aa1 from Androctonus australis and 91% with BmTX3 from Buthus martensi which, respectively, block A-type K+ current in cerebellum granular cells and striatum cultured neurons. Binding and displacement experiments using rat brain synaptosomes showed that AmmTX3 and Aa1 competed effectively with (125) I-labelled sBmTX3 binding. They fully inhibited the (125) I-labelled sBmTX3 binding (K (i) values of 19.5 pm and 44.2 pm, respectively), demonstrating unambiguously that the three molecules shared the same target in rat brain. The specific binding parameters of (125) I-labelled AmmTX3 for its site were determined at equilibrium (K (d) = 66 pm, B (max) = 22 fmol per mg of protein). Finally, patch-clamp experiments on striatal neurons in culture demonstrated that AmmTX3 was able to inhibit the A-type K+ current (K (i) = 131 nm) MH - France MH - Mexico|Morelos MH - Morocco PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000179772800006 L2 - scorpion toxins;A-type potassium current;striatum neurons;patch clamp;binding;CA2+-ACTIVATED K+ CHANNELS; POTASSIUM CHANNEL; BINDING-SITES; RAT-BRAIN; VENOM; CHARYBDOTOXIN; PURIFICATION; KALIOTOXIN; SEQUENCE; AFFINITY SO - European Journal of Biochemistry 2002 ;269(24):6037-6041 7019 UI - 11919 AU - Vadillo-Ortega F AU - Sadowsky DW AU - Haluska GJ AU - Hernandez-Guerrero C AU - Guevara-Silva R AU - Gravett MG AU - Novy MJ AD - Oregon Reg Primate Res Ctr, Div Reprod Sci, Beaverton, OR 97006, USAInst Nacl Perinatol, Dept Res Direct & Electron Microscopy, Mexico City, DF, MexicoOregon Hlth & Sci Univ, Dept Obstet & Gynecol, Portland, OR, USANovy, MJ, Oregon Reg Primate Res Ctr, Div Reprod Sci, 505 NW 185th Ave, Beaverton, OR 97006 USA TI - Identification of matrix metalloproteinase-9 in amniotic fluid and amniochorion in spontaneous labor and after experimental intrauterine infection or interleukin-1 beta infusion in pregnant rhesus monkeys AB - OBJECTIVE: The purpose of this study was to examine the roles of intrauterine infection, inflammation, and spontaneous labor on the expression of matrix metalloproteinase-9 in fetal membranes and amniotic fluid of late pregnant rhesus monkeys. STUDY DESIGN: Pregnant rhesus monkeys with timed gestations were chronically catheterized to allow serial sampling of amniotic fluid before and during experimentally induced intrauterine inflammation. Six animals received group B streptococci into the chorionic-decidual space, and 4 animals received intra-amniotic interleukin-1beta infusions (10 mug). Three additional animals were serially sampled by amniocentesis through late pregnancy until spontaneous term labor. Amniotic fluid samples were examined by zymography for matrix metalloproteinase-9 and -2 and Western immunoblot for matrix metalloproteinase-9 and -2 and tissue inhibitors of metalloproteinase-1 and -2. Fetal membranes were obtained at cesarean delivery during labor (before rupture), formalin fixed, and embedded in paraffin for immunocytochemistry of matrix metalloproteinase-9 and in situ hybridization of matrix metalloproteinase-9 messenger RNA. Tissues from 2 additional animals were collected as age-matched nonlabor controls. RESULTS: In amniotic fluid, the 92-kd latent matrix metalloproteinase-9 was detectable in late pregnancy and increased dramatically, followed by the appearance of the 83-kd active form before spontaneous term delivery. Amniotic fluid matrix metalloproteinase-2 levels (both latent and active forms) remained relatively constant throughout pregnancy and in labor. Both bacteria and interleukin-1 5 rapidly increased the signal of latent matrix metalloproteinase-9 without a consistent increase in the active form before the onset of labor. Chorionic-decidual inoculation of group B streptococci was followed by the expression of latent matrix metalloproteinase-9 before the appearance of group B streptococci in amniotic fluid or the onset of labor. Matrix metalloproteinase-2 increased to a new steady-state level or remained unchanged after group B streptococci inoculation or interleukin-1beta infusion, respectively. Amniotic fluid tissue inhibitors of metalloproteinase-1 declined and tissue inhibitors of metalloproteinase-2 remained unchanged during early group B streptococci infection, after interleukin-1beta infusion and on the day of spontaneous term labor. However, both tissue inhibitors of metalloproteinase-1 and -2 levels increased after preterm labor that was induced by group B streptococci. Immunocytochemistry localized matrix metalloproteinase-9 protein to amnion and chorion epithelial and mesenchymal cells and decidual stromal cells. Granular matrix metalloproteinase-9 staining was observed in the connective tissue layer of inflamed fetal membranes. In situ hybridization for messenger RNA confirmed the production of matrix metalloproteinase-9 by amnion and chorion. CONCLUSION: Bacterial- and interleukin-1beta-induced preterm labor and spontaneous term labor are preceded and accompanied by progressive increases in amniotic fluid matrix metalloproteinase-9 (92 kd) in rhesus monkeys. Amniotic fluid matrix metalloproteinase-9 may serve as a clinical marker for the onset of both preterm and term labor MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 24 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000173505200023 L2 - matrix metalloproteinases;gelatinase B;MMP-9;intrauterine infection;preterm labor;rhesus monkey;PREMATURE RUPTURE; INTRAAMNIOTIC INFECTION; TISSUE INHIBITOR; PRETERM LABOR; MEMBRANES; COLLAGEN; FIBROBLASTS; PARTURITION; CYTOKINES; CHORION SO - American Journal of Obstetrics and Gynecology 2002 ;186(1):128-138 7020 UI - 10984 AU - Vakhania N AD - State Univ Morelos, Fac Sci, Cuernavaca 62210, Morelos, MexicoInst Computat Math, Tbilisi 93, Rep of GeorgiaVakhania, N, State Univ Morelos, Fac Sci, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Scheduling equal-length jobs with delivery times on identical processors AB - The problem of scheduling n jobs of equal duration p with release and delivery times on m identical processors with the objective to minimize the maximal job completion time is considered. An algorithm is proposed that has the time complexity O(mn log n) if the maximal job delivery time q(max) is bounded by some constant. This is better than the earlier known best bound of O(mn(2)log(np/m)) for the version of the problem with non-restricted q(max). The algorithm has the time complexity O(q(max)(2) n log n max {m, q(max) }) without the restriction on q(max). As the presented computational experiments show, practical behavior of the algorithm remains good without restriction on q(max), i.e., for arbitrarily long delivery times, the running time of the algorithm, in practice, does not depend on q(max) MH - Mexico|Morelos MH - Rep of Georgia PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0020-7160 UR - ISI:000176035700006 L2 - scheduling identical processors;release time;delivery time;computational complexity;DATES SO - International Journal of Computer Mathematics 2002 ;79(6):715-728 7021 UI - 11120 AU - Vakhania N AU - Shchepin E AD - State Univ Morelos, Sci Fac, Cuernavaca 62210, Morelos, MexicoInst Computat Math, Tbilisi 93, Rep of GeorgiaSteklov Math Inst, Moscow 117966 8, RussiaVakhania, N, State Univ Morelos, Sci Fac, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Concurrent operations can be parallelized in scheduling multiprocessor job shop AB - We consider the multiprocessor job shop scheduling problem (JSP) with unrelated processors, an extension of the classical JSP. The precedence relations between the operations are given by an acyclic directed weighted graph, in which nodes represent operations and arcs represent precedence relations. The whole set of operations is partitioned into in subsets, and operations from kth subset have to be performed by any machine from the respective kth set of unrelated machines. The solution space of this generalized problem increases significantly as compared with that of the JSP. An algorithm is proposed, which drastically reduces this solution space. If we let v, and mu to be the number of operations and machines in each subset of operations and machines, then with a probability of almost 1, we generate approximately (mu)(mv) and 2(m(mu-1))mu(mv) times less feasible schedules than the number of all active feasible schedules of any corresponding instance of JSP and our generalized problem, respectively. Copyright (C) 2002 John Wiley Sons, Ltd MH - Mexico|Morelos MH - Rep of Georgia MH - Russia PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 1094-6136 UR - ISI:000175710200002 L2 - multiprocessor job shop scheduling;unrelated machines;solution tree;SHIFTING BOTTLENECK PROCEDURE; MULTIPURPOSE MACHINES SO - Journal of Scheduling 2002 ;5(3):227-245 7022 UI - 9891 AU - Valderrama LT AU - Del Campo CM AU - Rodriguez CM AU - Bashan LE AU - Bashan Y AD - Ctr Biol Res NW, La Paz 23000, MexicoPontificia Univ Javeriana, Dept Biol, Santafe de Bogota, Colombiade- Bashan, LE, Ctr Biol Res NW, AP 128, La Paz 23000, Mexico TI - Treatment of recalcitrant wastewater from ethanol and citric acid production using the microalga Chlorella vulgaris and the macrophyte Lemna minuscula AB - Laboratory-scale experiments were performed to develop a procedure for biological treatment of recalcitrant anaerobic industrial effluent (from ethanol and citric acid production) using first the microalga Chlorella vulgaris followed by the macrophyte Lemna minuscula. This recalcitrant dark-colored wastewater, containing high levels of organic matter and low pH, prevents the growth of microalgae and macrophytes, and therefore, could not be treated by them. Therefore, the wastewater was diluted to 10% of the original concentration with wash water from the production line. Within 4 days of incubation in the wastewater, C vulgaris population grew from 5 x 10(5) to 2 x 10(6) cells/mL. This culture reduced ammonium ion (71.6%), phosphorus (28%), and chemical oxygen demand (COD) (61%), and dissolved a floating microbial biofilm after 5 days of incubation. Consequently, L. minuscule was able to grow in the treated wastewater (from 7 to 14g/bioreactor after 6 days), precipitated the microalgal cells (by shading the culture), and reduced other organic matter and color (up to 52%) after an additional 6 days of incubation. However, L. minuscula did not improve removal of nutrients. This study demonstrates the feasibility of combining microalgae and macrophytes for bioremediation of recalcitrant industrial wastewater. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Colombia MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000178976800002 L2 - biotreatment;Chlorella;duckweed;industrial effluent;Lemna;nutrient removal;wastewater;WATER NUTRIENT REMOVAL; PHOSPHORUS REMOVAL; AQUATIC MACROPHYTES; DUCKWEED; ALGAE; SCENEDESMUS; NITROGEN; EFFLUENT; BIOREMEDIATION; RENOVATION SO - Water Research 2002 ;36(17):4185-4192 7023 UI - 9798 AU - Valdes-Martinez J AU - Hernandez-Ortega S AU - Hermetet AK AU - Ackerman LJ AU - Presto CA AU - Swearingen JK AU - Kelman DR AU - Goldberg KI AU - Kaminsky W AU - West DX AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoIllinois State Univ, Dept Chem, Normal, IL 61790, USAUniv Washington, Dept Chem, Seattle, WA 98195, USAValdes-Martinez, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Structural studies of N-2-(3-picolyl)- and N-2-(4-picolyl)-N '-tolylthioureas AB - Reactions of 2-aminopicolines with 2- and 4-tolyl isothiocyanates yielded N-2-(4-picolyl)-N'-4-tolylthiourea, 1, N-2-(3-picolyl)-N'-4-tolylthiourea, 2, and N-2-(4-picolyl)-N'-2-tolylthiourea, 3. Compound 1 is monoclinic, of space group P2(1)/c with a = 7.456(1) Angstrom, b = 13.135(3) Angstrom, c = 13.959(3) Angstrom, beta = 104.99(3)degrees, and V = 1320.5(5) Angstrom(3) with Z = 4, for d(calc) = 1.294 g/cm(3). Compound 2 is triclinic, of space group P (1) over bar 1 with a = 6.877(3) Angstrom, b = 7.590(5) Angstrom, c = 13.213(9)Angstrom, alpha = 78.38(2)degrees, beta = 77.96(4)degrees, gamma = 86.36(4)degrees, and V = 660.5(7)Angstrom(3) with Z = 2, for d(calc) = 1.294 g/cm(3). Compound 3 is monoclinic, of space group P2(1)/c with a = 12.604(2) Angstrom, b = 15.592(3) Angstrom, c = 6.875(2) Angstrom, beta = 91.05(2)degrees, and V = 1350.9(2) Angstrom(3) with Z = 4, for d(calc) = 1.265 g/cm(3). The three thioureas are found in both solid state and solution in a conformation resulting from intramolecular N-H ... N hydrogen bonding. Compounds 1 and 3 present an intermolecular hydrogen bond involving the thione sulfur and the NH hydrogen, which is not present in 2 owing to the steric hindrance of the methyl group in the phenyl ring. The geometry of the molecule is affected by the position of the methyl groups on the pyridine and aryl rings MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 3 U4 - Crystallography;Spectroscopy U5 - J;Article AV - English IS - 1074-1542 UR - ISI:000179322700002 L2 - thiourea;pyridine;hydrogen bonding;THIOUREA SO - Journal of Chemical Crystallography 2002 ;32(11):431-438 7024 UI - 11507 AU - Valdes-Martinez J AU - Hernandez-Ortega S AU - Espinosa-Perez G AU - Presto CA AU - Hermetet AK AU - Haslow KD AU - Ackerman LJ AU - Szczepura LF AU - Goldberg KI AU - Kaminsky W AU - West DX AD - Univ Washington, Dept Chem, Seattle, WA 98195, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoIllinois State Univ, Dept Chem, Normal, IL 61790, USAWest, DX, Univ Washington, Dept Chem, Box 351700, Seattle, WA 98195, USA TI - Structural, spectral and thermal studies of substituted N-(2-pyridyl)-N '-phenylthioureas AB - N-2-(3-picolyl)-N'-phenylthiourea, 3PicTuPh, monoclinic, P2(1)/n, a = 7.617(2) b = 7.197(5), c = 22.889(5) Angstrom, beta = 94.63(4)degrees, V = 1250.7(1) Angstrom(3) and Z = 4; N-2-(4-picolyl)-N'-phenylthiourea, 4PicTuPh, triclinic, P-1, a = 7.3960(5), b = 7.9660(12), c = 21.600(3) Angstrom, alpha = 86.401(4), beta = 84.899(8), gamma = 77.769(8)degrees, V = 1237.5(3) Angstrom(3) and Z = 4; N-2-(5-picolyl)N'-phenylthiourea, 5PicTuPh, monoclinic, P2(1)/c, a = 14.201(1), b = 4.905(3), c = 17.689(3) Angstrom, beta = 91.38(1)degrees, V = 1231.8(7) Angstrom(3) and Z = 4; N-2-(6-picolyl)-N'-phenylthiourea, 6PicTuPh, monoclinic, C2/c2, a = 14.713(1), b = 9.367(1), c = 18.227(1) Angstrom, beta = 92.88(1)degrees, V = 2515.5(1) Angstrom(3) and Z = 8 and N-2-(4,6-lutidyl)-N'-phenylthiourea, 4,6LutTuPh, monoclinic, C2/c, a = 11.107(2), b = 11.793(2), c = 20.084(4) Angstrom, beta = 96.10(3)degrees, V = 2616(1) Angstrom(3) and Z = 8. Intramolecular hydrogen bonding between (NH)-H-1 and the pyridyl nitrogen and intermolecular hydrogen bonding involving the thione sulfur are affected by substitution of the pyridine ring, as is the planarity of the molecule. H-1 NMR studies in CDCl3 show the NH' hydrogen resonance considerably downfield from other resonances in the spectrum for each thiourea. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000174630200011 L2 - 2-pyridyl thioureas;crystal structures;hydrogen bonding;plane deviation;THIOUREA DERIVATIVES; CRYSTAL SO - Journal of Molecular Structure 2002 ;608(1):77-87 7025 UI - 11788 AU - Valdes-Ramos R AU - Solomons NW AD - Inst Nacl Perinatol, Mexico City, DF, MexicoCtr Studie Sensory Impariment Aging & Metab, Guatemala City, GuatemalaValdes-Ramos, R, Inst Nacl Perinatol, Mexico City, DF, Mexico TI - Preventive nutrition: its changing context in MesoAmerica AB - The present article is an overview of the nutrition transition that is undergoing in MesoAmerica, where both sides of the malnutrition spectrum are present at very high rates. Although deaths due to the diseases of affluence are increasing at the same rate as in developed countries, undernutrition and its consequences (i.e. infectious diseases) are still taking a high toll among the youngest of the population. Preventive measures should include programs for promotion of sufficient nutrition while controlling for excesses leading to overnutrition. Nutrition recommendations should be able to promote both sides of the spectrum. The recommendation for an increased consumption of functional foods such as probiotics and prebiotics may become an appropriate measure as most studies indicate that they can be useful to decrease the incidence of infectious diseases while reducing some of the chronic ailments that affect the populations from developing countries. (C) 2002 Elsevier Science Inc. All rights reserved MH - Guatemala MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Nutrition & Dietetics U5 - J;Review AV - English IS - 0271-5317 UR - ISI:000173798700015 L2 - nutrition transition;MesoAmerica;undernutrition;chronic diseases;MALNUTRITION; CONSUMPTION; PROBIOTICS; PREBIOTICS; COUNTRIES; DIET SO - Nutrition Research 2002 ;22(1-2):145-152 7026 UI - 10106 AU - Valdes OT AU - Schubert BG AD - UNAM, Fac Estudios Super Iztacala, Lab Recursos Nat, UBIPRO, Thalnepantla 54090, Edo Mexico, MexicoHarvard Univ, Gray Herbarium, Cambridge, MA 02138, USAValdes, OT, UNAM, Fac Estudios Super Iztacala, Lab Recursos Nat, UBIPRO, Av Los Barrios 1,Los Reyes Iztacala, Thalnepantla 54090, Edo Mexico, Mexico TI - A new species and notes on a notable species of Dioscorea (Dioscoreaceae) for Mexico AB - Dioscorea omiltemensis, a new species from the State of Guerrero, Mexico, is described. Assigned to section Hyperocarpa, the new species is distinguished from D. oreodoxa of Mexico, as well as D. niederleinii and D. grisebachii of South America within the same section, by its different morphology, its geographic distribution, and its ecological preferences. In addition, in this; paper the staminate flowers of D. tacanensis are described and illustrated for the first time from the collections from the type locality; its relationship with D. cyphocarpa is discussed, as well as its geographic distribution and ecologic preferences MH - Mexico|Estado De Mexico MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - Spanish IS - 1055-3177 UR - ISI:000178421700020 L2 - Dioscorea;Dioscoreaceae;Mexico SO - Novon 2002 ;12(3):411-414 7027 UI - 10488 AU - Valdez-Fragoso A AU - Mujica-Paz H AU - Giroux F AU - Welti-Chanes J AD - Univ Autonoma Chihuahua, Fac Ciencias Quim, Secretaria Invest & Posgrado, Chihuahua, Chih, MexicoENSIA, SIARC, F-34033 Montpellier 01, FranceUniv Las America Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, MexicoWelti-Chanes, J, Univ Autonoma Chihuahua, Fac Ciencias Quim, Secretaria Invest & Posgrado, Ciudad Univ S-N, Chihuahua, Chih, Mexico TI - Pilot plant for osmotic dehydration of fruits: Design and evaluation AB - This work proposes a pilot scale equipment for osmotic dehydration (OD) of apple cubes that consists of a novel agitation-immersion device, a bag filter and a vacuum evaporator to conduct simultaneously the OD process, filtration and reconcentration of the osmotic solution (OS). The functional method analysis was used to design the pilot plant. Apple cubes (similar to 1 cm) were dehydrated using a 60 degreesBrix sucrose syrup OS at 50C and a syrup/fruit ratio of 5. OD was conducted either with or without reconcentration of the OS. During the OD process particles of fruit were eliminated from the OS by filtration and the OS concentration was kept at 60 degreesBrix by reconcentration in the evaporator. A comparison of the dehydration parameters of apple cubes obtained at pilot scale to those obtained at laboratory scale was done to evaluate the performance of the pilot equipment. The results show that the proposed set-up can be suitable for commercial production of osmodehydrated fruits MH - France MH - Mexico|Chihuahua MH - Mexico|Puebla PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0145-8876 UR - ISI:000177434800002 L2 - QUALITY; APPLES SO - Journal of Food Process Engineering 2002 ;25(3):189-199 7028 UI - 10980 AU - Valdez-Fragoso A AU - Mujica-Paz H AU - Giroux F AU - Welti-Chanes J AD - Univ Americas Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, MexicoUniv Autonoma Chihuahua, Fac Ciencias Quim, Chihuahua, Chih, MexicoENSIA SIARC, F-34033 Montpellier 01, FranceWelti-Chanes, J, Univ Americas Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, Mexico TI - Reuse of sucrose syrup in pilot-scale osmotic dehydration of apple cubes AB - Osmotic dehydration (OD) treatments of apple cubes were carried out in a pilot plant, which consisted of an OD vessel, a filter, a vacuum evaporator, and recirculating pumps. The osmotic solution (OS) was maintained at 59.5 +/- 1.5 degreesBrix and 50C by reconcentration in the evaporator, and suspended particles were eliminated by filtration. OS was reused to process 20 batches of apple cubes, maintaining a constant OS/fruit ratio of 5/1 (w/w) by addition of new OS. Evolution of pH, titratable acidity, soluble solids, water activity, color, reducing sugars, and microbial load in the OS was evaluated along the OD process. The OD parameters and the apple color were determined. Values of the physicochemical properties of the OS stabilized after 10 treated batches. A microbial load of 2590 +/- 330 CFU/mL was observed in the OS at the end of 20 OD treatments. Water loss, solids gain and color of dehydrated apple cubes obtained in OD process with reuse of the OS were similar to those found in an OD process carried out with a nonreused OS MH - France MH - Mexico|Chihuahua MH - Mexico|Puebla PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0145-8876 UR - ISI:000176060800003 SO - Journal of Food Process Engineering 2002 ;25(2):127-141 7029 UI - 9766 AU - Valdez-Gutierrez M AU - Rosado M AU - Puerari I AU - Georgiev L AU - Borissova J AU - mbrocio-Cruz P AD - Inst Nacl Astrophys Opt & Elect, Puebla 198504, MexicoUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoBulgarian Acad Sci, Astron Inst, BG-1784 Sofia, BulgariaIsaac Newton Inst Chile, Bulgarian Branch, Sofia, BulgariaValdez-Gutierrez, M, Observ Paris, Lab Etudes Rayonnement & Mat Astrophys, 61 Ave Observ, F-75014 Paris, France TI - Unveiling the kinematics and dynamics of ionized gas in the nearby irregular galaxy NGC 4449 AB - A detailed kinematic analysis of ionized gas in the nearby irregular galaxy NGC 4449 is presented. Observations were conducted in the spectral lines of Halpha and [S II]. Our scanning Fabry-Perot interferometric observations are presented from both a global and a local perspective. We have analyzed the global velocity field, the spatially extended diffuse gaseous component, and the H II region populations and, furthermore, have determined the rotation curve based on the heliocentric radial velocities of the global Halpha spatial distribution. Our results for NGC 4449 show that the optical velocity field decreases in radial velocity along the optical bar from northeast to southwest, presenting an anticorrelation relative to the outer velocity field of the H I component. This is in agreement with previous studies. The diffuse gaseous component that permeates the entire galaxy is analyzed (up to a limiting surface brightness of similar to3.165 x 10(-5) ergs cm(-2) s(-1) sr(-1)) in terms of its radial velocity field, as well as its velocity dispersions. We find that the diffuse gas component presents peculiar kinematic features, such as abrupt velocity gradients and highly supersonic velocity dispersions (sigma similar to 4 times the values of the nearest H II regions), but that its kinematic and dynamical influence is important on both global and local scales. The optical rotation curve of this nearby irregular galaxy shows that the northeast sector rotates like a solid body (v(rot) similar to 40 km s(-1) at R = 2 kpc). In contrast, for the southwest side our results are not conclusive; the behavior of the gas at those locations is chaotic. We conclude that the origin of such complex kinematics and dynamics is undoubtedly related to the aftermath of an interaction experienced by this galaxy in the past MH - Bulgaria MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000179361700012 L2 - galaxies : individual (NGC 4449);galaxies : irregular;galaxies : ISM;galaxies : kinematics and dynamics;ISM : general;H-II REGIONS; LARGE-MAGELLANIC-CLOUD; STAR-FORMING REGIONS; SUPER-NOVA REMNANT; INTERSTELLAR-MEDIUM; DWARF GALAXIES; LUMINOSITY FUNCTIONS; SIZE DISTRIBUTIONS; NEUTRAL HYDROGEN; NGC-4449 SO - Astronomical Journal 2002 ;124(6):3157-3178 7030 UI - 11432 AU - Valdez-Martinez J AU - strum-Acevedo JH AU - Toscano RA AU - Hernandez-Ortega S AU - Espinosa-Perez G AU - West DX AU - Helfrich B AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoIllinois State Univ, Dept Chem, Normal, IL 61790, USAUniv Washington, Dept Chem, Seattle, WA 98195, USAKansas State Univ, Dept Chem, Manhattan, KS 66506, USAValdez-Martinez, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Tetrachlorocuprate(II) salts of heterocyclic aminoguanidonium (guanylhydrazonium) ions AB - Condensation of aminoguanidine with 2-formylpyridine, 2-benzoylpyridine and 2,6-diacetylpyridine results in the aminoguanidones, HFogu, HBzgu and H(2)2,6Acgu(2), respectively. Reaction of the heterocyclic aminoguanidone in a mixture of hydrochloric acid-ethanol with copper(II) chloride produces the following mixed salts: [H(3)Fogu][CuCl4], (1), [H(3)Bzgu](2) [CuCl4]Cl-2.H2O, (2), and [H(5)2,6Acgu(2)][CuCl4]Cl.H2O, (3). Their crystal structures, as well as their ESR and UV spectra, have been obtained. The influence on the geometry of the [CuCl4](2-) of the N-H...Cl-Cu hydrogen bonds, in the context of charged compensation hypothesis, has been evaluated. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000174828300009 L2 - aminoguanidonium;copper(II) halides;crystal structures;tetrachlorocuprate(II);CRYSTAL-STRUCTURES; NICKEL(II) COMPLEXES; MAGNETIC-PROPERTIES; CATIONS; BR SO - Polyhedron 2002 ;21(4):409-416 7031 UI - 9334 AU - Valdez-Ramirez ME AU - Donval A AU - Le Pennec M AD - CIBNOR, Programa Acuicultura Marina, La Paz 23000, Baja California, MexicoInst Univ Europeen Mer, UMR CNRS 6539, Technopole Brest Iroise, F-29280 Plouzane, FranceValdez-Ramirez, ME, CIBNOR, Programa Acuicultura Marina, POB 128, La Paz 23000, Baja California, Mexico TI - Ultrastructural and histochemical criteria for determining normality in mature oocytes of the pacific oyster Crassostrea gigas AB - In hatcheries of bivalve molluscs, female gametes are assessed according to the morphologic stages of oocytic development. Three stages of oocytes immature, mature, and overripe were studied. We identified each category, based on ultrastructural features of the vitelline coat, cytoplasmic membrane, and organelles. Vitelline inclusions in the ooplasm were identified by ultrastructural and histochemical methods. Cytologic alterations involved in the typical degenerative process of mollusc oocytes were observed, including initial damage in the cytoplasmic membrane, rupture and degeneration of the vitelline coat, and damage in ooplasm and vitelline globules. All of these characteristics seem to be associated with the natural process of oocytic degeneration, but they can also be the consequence of handling during reproduction by artificial means MH - France MH - Mexico|Baja California PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000180576400039 L2 - oocyte;ultrastructure;histochemistry;Crassostrea gigas;reproduction;MUSSEL MYTILUS-EDULIS; PECTEN-MAXIMUS; OOGENESIS; QUALITY SO - Journal of Shellfish Research 2002 ;21(2):707-714 7032 UI - 9954 AU - Valdiviezo-Mijangos OC AU - Sabina FJ AU - Bravo-Castillero J AU - Rodriguez-Ramos R AU - Guinovart-Diaz R AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoNatl Autonomous Univ Mexico, Inst Geofis, Posgrado Ciencias Tierra, Mexico City 04510, DF, MexicoUniv La Habana, Fac Matemat & Comput, Havana 10400, CubaNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoSabina, FJ, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Apartado Postal 20726 C-O Delegac Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Fiber-reinforced composite with cubic symmetry constituents AB - An elastic material with unidirectional cylindrical fibers periodically distributed is analyzed. Each periodic cell is a binary homogeneous elastic medium with cubic symmetry constituents. Perfect bonding conditions at the interface are considered. Simple closed-form formulae are obtained for the overall properties using the asymptotic homogenization method. The analytical solution of the required resulting plane- and antiplane-strain local problems, which turns out to be only three, makes use of potential methods of a complex variable and properties of Weierstrass elliptic and related functions of periods (1,0) and (0,1). Two new exact relations are derived without solving any local problem and are valid for any shape of the interface compatible with the square symmetry. Some numerical examples are shown. (C) 2002 Published by Elsevier Science B.V MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000178852800037 L2 - fiber-reinforced composite;exact relations;asymptotic homogenization method;cubic symmetry;tetragonal symmetry;elliptic functions;effective properties SO - Materials Letters 2002 ;56(3):339-343 7033 UI - 10217 AU - Valdiviezo-Mijangos OC AU - Guinovart-Diaz R AU - Bravo-Castillero J AU - Rodriguez-Ramos R AU - Sabina FJ AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Admon Delegac Alvaro Obregon 20, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, Havana 10400, CubaValdiviezo-Mijangos, OC, Univ Cambridge, Dept Appl Math & Theoret Phys, Silver St, Cambridge CB3 9EW, England TI - Elastic effective coefficients of fibre-reinforced composite with cubic symmetry constituents in a hexagonal arrangement MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mechanics U5 - J;Article AV - English IS - 0093-6413 UR - ISI:000178129400006 L2 - TRANSVERSELY ISOTROPIC CONSTITUENTS; CLOSED-FORM EXPRESSIONS; PIEZOELECTRIC COMPOSITES; ASYMPTOTIC HOMOGENIZATION; UNIFORM-FIELDS; MEDIA SO - Mechanics Research Communications 2002 ;29(2-3):113-119 7034 UI - 10804 AU - Valencia-Islas N AU - Abbas H AU - Bye R AU - Toscano R AU - Mata R AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Biol, Jardin Bot, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Quim, Lab Rayos X, Mexico City 04510, DF, MexicoUSDA ARS, Crop Genet & Prod Res Unit, Stoneville, MS 38776, USAMata, R, Natl Autonomous Univ Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, Mexico TI - Phytotoxic compounds from Prionosciadium watsoni AB - Bioassay-guided fractionation of a phytotoxic extract of Prionosciadium watsoni led to the isolation of three new pyranocoumarins and two pyranochromones. The new compounds were characterized as propionic acid (9R,10R)-9-acetoxy-8,8-dimethyl-9,10-dihydro-2H,8H-benzo[1,2-b:3,4-b']di pyran-2-one-10-yl ester (1), isobutyric acid (9R,10R)-9-hydroxy-8,8-dimethyl-9,10-dihydro-2H,8H-benzo[1,2-b:3,4-b']di pyran-2-one-10-yl ester (2), isobutyric acid (9R)-8,8-dimethyl-9,10-dihydro-2H,8H-benzo[1,2-b:3,4-b']dipyran-2-one-9- yl ester (10), 2-methylbut-(2Z)-enoic acid (3R)-5-methoxy-3,4-dihydro-2,2,8-trimethyl-6-oxo-2H,6H-benzo[1,2-b:5,4-b ']dipyran-3-yl ester (11), and isobutyric acid (3R)-5-methoxy-3,4-dihydro2,2,8-trimethyl-6-oxo-2H,6H-benzo[1,2-b:5,4-b' ]dipyran-3-yl ester (12) by spectroscopic and chemical methods. The stereochemistry at the stereogenic centers was established by applying the Mosher ester methodology. The structures of 1 and 2 were corroborated by single-crystal X-ray diffraction studies. The phytotoxic activity of the isolated compounds was assessed on Amaranthus hypochondriacus, Echinochloa crus-galli, and Lemna pausicostata. The phytotoxins also modified the electrophoretic mobility of calmodulin from both bovine-brain and spinach MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000176688300005 L2 - COUMARINS SO - Journal of Natural Products 2002 ;65(6):828-834 7035 UI - 10209 AU - Valencia-Islas NA AU - Paul RN AU - Shier WT AU - Mata R AU - Abbas HK AD - USDA ARS, Crop Genet & Prod Res Unit, Stoneville, MS 38776, USAUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUSDA ARS, So Weed Res Unit, Stoneville, MS 38776, USAUniv Minnesota, Coll Pharm, Minneapolis, MN 55455, USAAbbas, HK, USDA ARS, Crop Genet & Prod Res Unit, POB 345, Stoneville, MS 38776 USA TI - Phytotoxicity and ultrastructural effects of gymnopusin from the orchid Maxillaria densa on duckweed (Lemna pausicostata) frond and root tissues AB - Two phenanthrene derivatives, characterized as erianthridin (9,10-dihydro-2,7-dihydroxy-3,4-dimethoxyphenanthrene) and gymnopusin (2,7-dihydroxy-3,4,9-trimethoxyphenanthrene), were isolated from an extract of the orchid Maxillaria densa, using phytotoxicity with amaranth (Amaranthus hypochondriacus) to guide fractionation. Gymnopusin and erianthridin inhibited radicle elongation of A. hypochondriacus seedlings with IC50 values of 330 and 58.2 muM, respectively. The phytoxicity of the two phenanthrene derivatives was also assessed on duckweed (Lemna pausicostata), and compared with mammalian toxicity estimated in vitro with four mammalian cell lines. On duckweed, both phenanthrene derivatives caused electrolyte leakage, chlorophyll loss and photobleaching. Ultrastructural examination of duckweed frond and root tissues treated with gymnopusin (100 muM) revealed membrane damage to the tonoplast after 12 h of exposure. Effects on membrane integrity followed a time course similar to that of electrolyte leakage. Both phenanthrene derivatives exhibited moderate cytotoxicity to all mammalian cells tested, which precludes their use as a bioherbicide. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000178189900006 L2 - gymnopusin;Lemna pausicostata;Lemnaceae;erianthridin;orchid;phenanthrene derivatives;phytotoxicity;mammalian cytotoxicity;ultrastructure;membrane leakage;AAL-TOXIN; ACCUMULATION; FUMONISIN SO - Phytochemistry 2002 ;61(2):141-148 7036 UI - 9909 AU - Valenzuela D AU - Macdonald DW AD - Univ Oxford, Dept Zool, Wildlife Conservat Res Unit, Oxford OX1 3PS, EnglandUniv Autonoma Morelos, Ctr Educ Ambiental & Invest Sierra Huautla, Dept Ecol & Conservac Recursos Nat, Cuernavaca 62210, Morelos, MexicoMacdonald, DW, Univ Oxford, Dept Zool, Wildlife Conservat Res Unit, S Parks Rd, Oxford OX1 3PS, England TI - Home-range use by white-nosed coatis (Nasua narica): limited water and a test of the resource dispersion hypothesis AB - The resource dispersion hypothesis (RDH) proposes that in a spatially and temporally heterogeneous environment the territory size of social carnivores increases as the dispersion of limited resources is more widely spaced, whereas group size is limited, independently, by the richness or abundance of those resources or key habitats. To assess if white-nosed coatis Nasua narica behave in accordance with the RDH, the relationship between home-range size and spatio-temporal availability of resources in Mexican tropical dry forests with marked seasonal rainfall was examined. Specifically, home-range sizes were compared at two study sites that were broadly similar but contrasting in resource abundance and dispersion. Home-range estimates for seven white-nosed coati bands varied between 45 and 362 ha. Homerange size did not correlate with food resource abundance and was better explained by the dispersion of water sources during the dry season. Average home-range size was three times greater at the site where water sources were more widely separated during the dry season. These results are in accordance with the predictions of the RDH, and provide an example where the critical resource determining range size and configuration is water MH - United Kingdom MH - Mexico|Morelos PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Zoology U5 - J;Article AV - English IS - 0952-8369 UR - ISI:000179022600009 L2 - home ranges;Mexico;Nasua narica;social carnivore;tropical dry forest;TROPICAL DECIDUOUS FOREST; CARNIVORE SOCIAL-BEHAVIOR; BADGER TERRITORIES; HABITAT SELECTION; EUROPEAN BADGER; MELES-MELES; DRY FOREST; MEXICO; ORGANIZATION; PATTERNS SO - Journal of Zoology 2002 ;258():247-256 7037 UI - 10786 AU - Valor A AU - Reguera E AU - Torres-Garcia E AU - Mendoza S AU - Sanchez-Sinencio F AD - Natl Politech Inst, Res Ctr Appl Sci & Adv Technol, Mexico City 11500, DF, MexicoUniv Havana, IMRE, Havana 10400, CubaValor, A, Natl Politech Inst, Res Ctr Appl Sci & Adv Technol, Legaria 694,Col Irrigac, Mexico City 11500, DF, Mexico TI - Thermal decomposition of the calcium salts of several carboxylic acids AB - A systematic study of thermal decomposition of the calcium salts of eight carboxylic acids, using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), is presented. Synthesized calcium salts of carboxylic acids with 3-13 carbon atoms in the aliphatic chain exist as monohydrates that transform into anhydrous salts at about 110 degreesC, changing their structures and diminishing their crystallinity. Beginning at temperatures between 160 and 315 degreesC, the salts decompose, forming carbonates as final solid products. From a qualitative point of view, the studied salts show a thermal stability that exponentially decreases with the aliphatic chain length growth. In the temperature interval between dehydration and decomposition, some of the samples suffer a recrystallization process, while others melt. The conclusions possible from thermal analysis were confirmed by monitoring the changes in salt crystallinity with temperature and the appearance of new phases by X-ray powder diffraction (XRD). Infrared (IR) spectroscopy also suggests these conclusions. (C) 2002 Elsevier Science B.V. All tights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000176677000016 L2 - thermal analysis;calcium salts of carboxylic acids;powder diffraction;infrared spectroscopy SO - Thermochimica Acta 2002 ;389(1-2):133-139 7038 UI - 11584 AU - Valor A AU - Reguera E AU - Sanchez-Sinencio F AD - Inst Politecn Nacl, CICATA, Mexico City 11500, DF, MexicoUniv Havana, Fac Phys, Havana, CubaUniv Havana, Inst Mat & Reagents, Havana, CubaValor, A, Inst Politecn Nacl, CICATA, Legaria 694,Colonia Irrigac, Mexico City 11500, DF, Mexico TI - Synthesis and X-ray diffraction study of calcium salts of some carboxylic acids AB - An experimental X-ray diffraction (XRD) study of calcium salts of four carboxylic acids is presented. Calcium salts of propionic, butyric, valeric, and caproic acids were synthesized mixing in a mortar Ca(OH)(2) with the liquid acids. Measuring the thermogravimetric analysis curves it was determined that the salts were actually monohydrates. The densities of the synthesized samples were measured using a density gradient column. The measured values for the densities were as follows: D-m(propionate)=1.38 g/cm(3), D-m(butyrate)=1.30 g/cm(3), D-m(valerate)=1.26 g/cm(3), D-m(caproate) = 1.22 g/cm(3). The XRD analysis revealed that these compounds have monoclinic cells with symmetry described by the P2(1) /a space group. Calcium propionate hydrate has cell parameters: a = 2.43751(5) nm, b=0.681 24(1) nm, c=0.591 43(1) nm, beta=95.320(2)degrees. For calcium butyrate hydrate the cell parameters are: a = 2.966 84(8) nm, b = 0.680 74(2) nm, c = 0.589 29(2) nm, beta = 95.442(3)degrees. The cell parameters for calcium valerate hydrate are: a = 3.566 36(4) nm, b = 0.68249(1) nm, c = 0.59277(1) nm, beta = 107.280(1)degrees and for calcium caproate hydrate a = 4.18030(5) nm, b = 0.68261(1) nm, c = 0.59213(1) nm, beta = 110.230(1)degrees. The calculated density values from the XRD results, taking into account that the number of chemical formulas in the unit cell equals four, agree very well with the measured ones. It was established that the unit cell parameter a grows with the increase of the number of carbon atoms in the aliphatic chain, while parameters b and c remain almost constant. This is an indication of the stacking layer character of the structure as has been suggested for calcium stearate monohydrate. This fact points to the possibility of the refinement of the crystalline structures taking as the starting point the reported structure for calcium stearate monohydrate. (C) 2002 International Centre for Diffraction Data MH - Cuba MH - Mexico|Distrito Federal PB - NEWTOWN SQ: J C P D S-INT CENTRE DIFFRACTION DATA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0885-7156 UR - ISI:000174403500004 L2 - X-ray diffraction;carboxylic acids;calcium salts;TGA;POWDER; PATTERNS; LATTICES SO - Powder Diffraction 2002 ;17(1):13-18 7039 UI - 11706 AU - valos-Orozco LA AU - Busse FH AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Bayreuth, Inst Phys, D-95440 Bayreuth, GermanyDavalos-Orozco, LA, Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ,Apartado Postal 70-360,Delegac Coyoca, Mexico City 04510, DF, Mexico TI - Instability of a thin film flowing on a rotating horizontal or inclined plane AB - In this paper the instability of a thin fluid film flowing under the effects of gravity, Coriolis, and centrifugal forces is investigated. It is supposed that the film flows far from the axis of rotation on a plane which may be horizontal or inclined with respect to the horizontal. In the former case, the flow is only driven by the centrifugal force while in the latter case, the flow is driven by the components of centrifugal force and gravity along the plane. This case may also be considered as the flow down a rotating cone but far from the apex. The stabilizing influence of rotation on the film flow increases with the rotation rate. Up to a certain critical rate of rotation, the film flowing down the rotating inclined plane (or cone) is more stable than the flow on the horizontal rotating plane while above this rate of rotation the situation is reversed. The instability above the critical rate is associated with a finite wave number in contrast to the vanishing wave number of the instability below the critical rate. The possibility of Ekman layer instabilities is also investigated. An equation describing the nonlinear evolution of surface waves is also obtained. Moreover, this equation is simplified for the case in which the amplitudes are very small. An equation including dissipation as well as dispersion is derived whose solutions may possess solitary waves, as in the case of similar equations considered in the literature. These solutions are likely to correspond to the solitary spiral waves observed in experiments MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000174038300083 L2 - LIQUID-FILM; SOLITARY WAVES; VERTICAL WALL; FALLING FILMS; SURFACE; MEDIA SO - Physical Review e 2002 ;65(2): 7040 UI - 10403 AU - Van Dijck P AU - Mascorro-Gallardo JO AU - De Bus M AU - Royackers K AU - Iturriaga G AU - Thevelein JM AD - Katholieke Univ Leuven, Lab Mol Cell Biol, B-3001 Heverlee, BelgiumVIB, B-3001 Heverlee, BelgiumUNAM, Dept Biol Mol Plantas, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoThevelein, JM, Katholieke Univ Leuven, Lab Mol Cell Biol, Kasteelpk Arenberg 31, B-3001 Heverlee, Belgium TI - Truncation of Arabidopsis thaliana and Selaginella lepidophylla trehalose-6-phosphate synthase unlocks high catalytic activity and supports high trehalose levels on expression in yeast AB - Plants, such as Arabidopsis thaliana and Selaginella lepidophylla, contain genes homologous with the trehalose-6-phosphate synthase (TPS) genes of bacteria and fungi. Most plants do not accumulate trehalose with the desert resurrection plant S. lepidophylla, being a notable exception. Overexpression of the plant genes in a Saccharomyces cerevisiae tps1Delta mutant results in very low TPS-catalytic activity and trehalose accumulation. We show that truncation of the plant-specific N-terminal extension in the A. thaliana AtTPS1 and S. lepidophylla SlTPS1 homologues results in 10 40-fold higher TPS activity and 20 40-fold higher trehalose accumulation on expression in yeast. These results show that the plant TPS enzymes possess a high-potential catalytic activity. The growth defect of the tps1Delta strain on glucose was restored, however, the proper homoeostasis of glycolytic flux was not restored, indicating that the plant enzymes were unable to substitute for the yeast enzyme in the regulation of hexokinase activity. Further analysis of the N-terminus led to the identification of two conserved residues, which after mutagenesis result in strongly enhanced trehalose accumulation upon expression in yeast. The plant-specific N-terminal region may act as an inhibitory domain allowing modulation of TPS activity MH - Belgium MH - Mexico|Morelos PB - LONDON: PORTLAND PRESS RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0264-6021 UR - ISI:000177642400007 L2 - glycolysis;Saccharomyces cerevisiae;sugar influx;TRANSGENIC TOBACCO PLANTS; SACCHAROMYCES-CEREVISIAE; DROUGHT TOLERANCE; ESCHERICHIA-COLI; STRESS-TOLERANCE; GLUCOSE INFLUX; TPS1 MUTANT; GENE; GLYCOLYSIS; METABOLISM SO - Biochemical Journal 2002 ;366():63-71 7041 UI - 11403 AU - van Hunnik E AU - Sultemeyer D AD - Univ Kaiserslautern, Fachbereich Biol, D-67653 Kaiserslautern, GermanySultemeyer, D, Univ Nacl Autonoma Mexico, Inst Biotechnol, Apdo Postal 510-3, Cuernavaca, Morelos, Mexico TI - A possible role for carbonic anhydrase in the lumen of chloroplast thylakoids in green algae AB - In order to understand the function of the lumen carbonic anhydrase (CA) which is bound to PSII at the lumenal side of the thylakoids in chloroplasts of eukaryotic algae, thylakoids were isolated from chloroplasts of Tetraedron minimum, Chlamydomonas noctigama, the cell wall-less mutant Chlamydomonas reinhardtii CW15, and a C. reinhardtii CW15/CLA3 mutant which lacks the lumen CA. The isolated thylakoids produced O-2, on illumination and exhibited electron flow between PSII and PSI, indicating that the thylakoids were intact and the photosynthetic apparatus were functional. We could not detect any uptake of HCO3-, nor efflux of COD from the thylakoids upon illumination, making it improbable that the CA present in the lumen of the thylakoids would play a role in furnishing CO2 for Rubisco. We were able to determine ATP production upon illumination in isolated thylakoids. Under high inorganic carbon (Ci; 5 mM), all species showed significant amounts of ATP being produced. Under low Ci (200 muM), we could not detect ATP formation from C. reinhardtii CW 15/CIA3 upon illumination. This mutant was not able to survive more then 4 h of low Ci in culture. We therefore suggest that the lumen CA is not involved in the CO2 concentrating mechanism, but might play a role in the formation of a proton gradient across the thylakoid membranes MH - Germany MH - Mexico|Morelos PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 9 U4 - Plant Sciences U5 - J;Article AV - English IS - 1445-4408 UR - ISI:000174989500013 L2 - Chlamydomonas reinhardtii;CO2 concentrating mechanism;green algae;lumen carbonic anhydrase (CAH3);photosynthetic electron transport;PSII;CHLAMYDOMONAS-REINHARDTII; PHOTOSYSTEM-II; INORGANIC CARBON; CO2-CONCENTRATING MECHANISMS; DUNALIELLA-TERTIOLECTA; O-18 EXCHANGE; CI CELLS; CO2; BICARBONATE; CYANOBACTERIA SO - Functional Plant Biology 2002 ;29(2-3):243-249 7042 UI - 10949 AU - van Tubergen A AU - Debats I AU - Ryser L AU - Londono J AU - Burgos-Vargas R AU - Cardiel MH AU - Landewe R AU - Stucki G AU - van der Heijde D AD - Univ Hosp Maastricht, Div Rheumatol, Dept Internal Med, NL-6202 AZ Maastricht, NetherlandsUniv Zurich Hosp, CH-8091 Zurich, SwitzerlandInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoUniv Munich, Munich, GermanyLimburgs Univ Centrum, Diepenbeek, Belgiumvan Tubergen, A, Univ Hosp Maastricht, Div Rheumatol, Dept Internal Med, POB 5800, NL-6202 AZ Maastricht, Netherlands TI - Use of a numerical rating scale as an answer modality in ankylosing spondylitis-specific questionnaires AB - Objectives. To determine the agreement of scores on the original visual analog scale (VAS) or Likert scale of the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Bath Ankylosing Spondylitis Functional Index (BASFI), and Dougados Functional Index (DFI) with scores on a numerical rating scale (NRS). To assess the reproducibility and responsiveness of the instruments with the original scale and NRS. Methods. Five hundred thirty-six patients with ankylosing spondylitis from the Netherlands, Mexico, and Switzerland completed a questionnaire in which all questions from the BASDAI, BASFI, and DFI were presented twice in random order with an 11-point NRS and either a 10-cm VAS (BASDAI and BASFI) or a 5-point Likert scale (DFI). Agreement of scores using Bland-Altman plots and intraclass correlation coefficients (ICCs), reproducibility using ICCs, and responsiveness were assessed. Results. Large variability between the scores on the original scales and the NRS was found in individual questions of all 3 questionnaires, although total scores showed ICCs of at least 0.88. Reproducibility of all answer modalities showed low ICCs in individual questions, but moderate to good ICCs in total scores (Dutch group 0.62-0.89; Mexican group 0.53-0.72). Moderate to large effects (0.48-1.04) were found in responsiveness scores in the 3 questionnaires. No major differences in reproducibility, and responsiveness between the answer modalities were found. Conclusion. Although large variability between the scores on the original answer scales and the NRS was observed, the BASDAI. BASE, and DFI can be administered with an NRS, which does not show important differences compared with the original scales MH - Belgium MH - Germany MH - Mexico|Distrito Federal MH - Netherlands MH - Switzerland PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 9 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000176197600004 L2 - ankylosing spondylitis;functional index;disease activity;reproducibility;responsiveness;scales;VISUAL ANALOG SCALES; FUNCTIONAL-INDEX; PAIN INTENSITY; HEALTH-STATUS; INSTRUMENTS; RESPONSIVENESS; VALIDATION; VERSION SO - Arthritis & Rheumatism-Arthritis Care & Research 2002 ;47(3):242-248 7043 UI - 10022 AU - Vandame R AU - Morand S AU - Colin ME AU - Belzunces LP AD - ECOSUR Colegio Frontera Sur, Proyecto Abejas Chiapas, Tapachula 30700, Chiapas, MexicoINRA, UMR, UAPV Ecol Invertebres, F-84914 Avignon, FranceUniv Perpignan, Ctr Biol & Ecol Trop & Mediterraneenne, F-66025 Perpignan, FranceVandame, R, ECOSUR Colegio Frontera Sur, Proyecto Abejas Chiapas, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Parasitism in the social bee Apis mellifera: quantifying costs and benefits of behavioral resistance to Varroa destructor mites AB - The case of a host-parasite relationship may provide a good model to evaluate the costs and benefits of some behaviors, an area in which field data a currently lacking. European (EHB) and Africanized (AHB) honey bees are two Apis mellifera subspecies that coexist in Mexico, the former highly compatible with Varroa destructor, the latter less compatible. Here we examine two mechanisms that could explain the low compatibility between AHB and V. destructor in Mexico: (1) grooming behavior appeared significantly more intensive in AHB colonies, but was nevertheless ineffective; (2) EHB removed 8.03% of the infested brood, while AHB removed 32.46%, especially between 5 and 7 days post-capping. Though the cost of removing infested brood was not different between subspecies, the result, in terms of the amount of removed infested brood, was significantly higher for AHB. For both bees, there is thus a real cost, since removing a pupa results in a lower number of adult bees. We discuss the possibility that the removal of infested brood corresponds with a threshold above which the cost of removal becomes greater than the benefit MH - France MH - Mexico|Chiapas PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000178745200002 L2 - Apis mellifera;Varroa destructor;parasitology;costs and benefits;behavioral resistance;HONEY-BEES; HYGIENIC BEHAVIOR; JACOBSONI OUD; CERANA FABR; GROOMING BEHAVIOR; WORKER BROOD; COLONIES; HYMENOPTERA; APIDAE; REPRODUCTION SO - Apidologie 2002 ;33(5):433-445 7044 UI - 9579 AU - Vander Stappen J AU - De Laet J AU - Gama-Lopez S AU - Van Campenhout S AU - Volckaert G AD - Katholieke Univ Leuven, Lab Gene Technol, B-3001 Louvain, BelgiumAmer Museum Nat Hist, Div Invertebrate Zool, New York, NY 10024, USAUniv Nacl Autonoma Mexico, Lab Recursos Nat, Unidad Tecnol & Protipos, FES Iztacala,Lab Recursos Nat,UBIPRO, Estado Mexico 54090, MexicoVander Stappen, J, Katholieke Univ Leuven, Lab Gene Technol, Kasteelpk Arenberg 21, B-3001 Louvain, Belgium TI - Phylogenetic analysis of Stylosanthes (Fabaceae) based on the internal transcribed spacer region (ITS) of nuclear ribosomal DNA AB - Phylogenetic relationships in Stylosanthes are inferred by DNA sequence analysis of the ITS region (ITS1-5.8S-ITS2) of the nuclear ribosomal DNA in 119 specimens, representing 36 species of Stylosanthes and 7 species of the outgroup genera Arachis and Chapmannia. In all examined specimens of any particular diploid and (allo)polyploid species, only a single ITS sequence type was observed. This allowed us to identify a parental genome donor for some of the polyploids. In several diploid and polyploid species, different specimens contained a different ITS sequence. Some of these sequence types were present in more than one species. Parsimony analysis yielded several well-supported clades that agree largely with analyses of the chloroplast trnL intron and partially with the current sectional classification. Discordances between the nuclear and cpDNA analyses are explained by a process of allopolyploidization with inheritance of the cpDNA of one parent and fixation of the ITS sequences of the other. S. viscosa has been an important genome donor in this process of speciation by allopolyploidy MH - Belgium MH - Mexico|Estado De Mexico MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0378-2697 UR - ISI:000179663300003 L2 - Fabaceae;Stylosanthes;internal transcribed spacer region (ITS);molecular phylogeny;allopolyploid;DNA sequence analysis;GENETIC-RELATIONSHIPS; CONCERTED EVOLUTION; SEQUENCES; SCABRA; BRASSICACEAE; SPECIATION; HUMILIS; HAMATA; RDNA SO - Plant Systematics and Evolution 2002 ;234(1-4):27-51 7045 UI - 10283 AU - Vander Stappen J AU - Lopez SG AU - Davila P AU - Volckaert G AD - Katholieke Univ Leuven, Lab Gene Technol, B-3001 Louvain, BelgiumUniv Nacl Autonoma Mexico, Unidad Biol Tecnol & Prototipus, FES Iztacala, Lab Recursos Nat, Estado Mexico 54090, MexicoVolckaert, G, Katholieke Univ Leuven, Lab Gene Technol, Kasteelpk Arenberg 21, B-3001 Louvain, Belgium TI - Molecular evidence for the hybrid origin of a new endemic species of Stylosanthes Sw. (Fabaceae) from the Mexican Yucatan Peninsula AB - Stylosanthes aff. calcicola is a formally undescribed tetraploid species from the Mexican Yucatan Peninsula, showing morphological similarities to the diploid species S. calcicola, but distinct in a number of characters. We used uni- and biparentally inherited molecular markers to infer the hybrid origin of this species in relation to known diploid species of Stylosanthes. Molecular characterization was based on length and/or DNA sequence variation of nuclear sequence-tagged site (STS) markers, the internal transcribed spacer (ITS) region of nuclear rDNA and the trnL intron of chloroplast DNA (cpDNA). Stylosanthes aff. calcicola contains a distinct cpDNA haplotype and nuclear DNA fragment, with closest relationship to the diploid species S. calcicola. In contrast, the DNA sequences of two nuclear loci reveal a closer relationship to the diploid species S. angustifolia, S. hispida, S. humilis, S. leiocarpa and S. viscosa. The majority of the STS markers showed additivity of PCR fragments in S. aff. calcicola, representing the combination of two genetically different genomes. We postulate that S. aff. calcicola is a distinct species of allotetraploid origin that appears to have originated once from hybridization between two divergent genomes, of which the maternal and paternal parent are closely related to, or derived from, a member of the lineages represented by S. calcicola and S. viscosa, respectively. (C) 2002 The Linnean Society of London MH - Belgium MH - Mexico|Estado De Mexico PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000177963300001 L2 - allopolyploidy;cpDNA;fixed heterozygosity;hybrid speciation;molecular phylogeny;nuclear markers;RAPID GENOMIC CHANGES; DNA-SEQUENCES; GENETIC-RELATIONSHIPS; POLYPLOID FORMATION; CHLOROPLAST DNA; EVOLUTION; COTTON; SCABRA SO - Botanical Journal of the Linnean Society 2002 ;140(1):1-13 7046 UI - 9723 AU - Vandermeer J AU - Perfecto I AU - Nunez GI AU - Phillpott S AU - Ballinas AG AD - Univ Michigan, Dept Ecol & Evolut Biol, Ann Arbor, MI 48109, USAUniv Michigan, Sch Nat Resources & Environm, Ann Arbor, MI, USAEscuela Frontera Sur ECOSUR, Tapachula, Chiapas, MexicoVandermeer, J, Univ Michigan, Dept Ecol & Evolut Biol, Ann Arbor, MI 48109 USA TI - Ants (Azteca sp.) as potential biological control agents in shade coffee production in Chiapas, Mexico AB - The role of Azteca sp. ants as potential biological control agents was studied in an organic coffee farm in Chiapas, Mexico. Individual larvae of Pieris rapae were placed on trees with artificially enhanced ant activity and both time to disappearance of the larvae and ant activity were recorded. There was a general negative relationship between time to disappearance and ant activity. A census of spiders was made of coffee bushes with and without foraging Azteca, encountering a negative relationship between ants and spiders. These results indicate that Azteca ants have potential as pests through their positive effect on scale insects, but also have potential as biological control agents, through their negative effect on potential herbivores. Furthermore, the correlation between ant and spider densities suggests a complicated relationship between these two predatory organisms, implying a more complicated food web structure than simply ants, homoptera and other herbivores MH - USA MH - Mexico|Chiapas PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Agronomy;Forestry U5 - J;Article AV - English IS - 0167-4366 UR - ISI:000179612000010 L2 - food webs;integrated pest management;natural enemies;pest control;shade trees SO - Agroforestry Systems 2002 ;56(3):271-276 7047 UI - 9917 AU - Vandertol-Vanier HA AU - Vazquez-Duhalt R AU - Tinoco R AU - Pickard MA AD - Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, CanadaUNAM, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoPickard, MA, Univ Alberta, Dept Biol Sci, CW 405,Biol Sci Bldg, Edmonton, AB T6G 2E9, Canada TI - Enhanced activity by poly(ethylene glycol) modification of Coriolopsis gallica laccase AB - We are studying the enzymatic modification of polycyclic aromatic hydrocarbons (PAHs) by the laccase from Coriolopsis gallica UAMH 8260. The enzyme was produced during growth in a stirred tank reactor to 15 units ml(-1), among the highest levels described for a wild-type fungus; the enzyme was the major protein produced under these conditions. After purification, it exhibited characteristics typical of a white rot fungal laccase. Fifteen azo, and phenolic compounds at 1 mM concentration were tested as mediators in the laccase oxidation of anthracene. Higher anthracene oxidation was obtained with the mediator combination of ABTS and HBT, showing a correlation between the oxidation rate and the mediator concentration. Reactions with substituted phenols and anilines, conventional laccase substrates, and PAHs were compared using the native laccase and enzyme preparations chemically modified with 5000 MW-poly(ethylene glycol). Chemically modified laccase oxidized a similar range of substituted phenols as the native enzyme but with a higher catalytic efficiency. The k(cat) increase by the chemical modification may be as great as 1300 times for syringaidazine oxidation. No effect was found of chemical modification on mediated PAH oxidation. Both unmodified and PEG-modified laccases increased PAH oxidation up to 1000 times in the presence of radical mediators. Thus, a change of the protein surface improves the mediator oxidation efficiency, but does not affect non enzymatic PAH oxidation by oxidized mediators MH - Canada MH - Mexico|Morelos PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1367-5435 UR - ISI:000179052500002 L2 - polycyclic aromatic hydrocarbons;Coriolopsis gallica;PEG-laccase;oxidation;white rot fungi;POLYCYCLIC AROMATIC-HYDROCARBONS; LIGNIN MODEL COMPOUNDS; WHITE-ROT FUNGI; TRAMETES-VERSICOLOR; PHANEROCHAETE-CHRYSOSPORIUM; CATALYTIC PROPERTIES; MEDIATOR-SYSTEMS; ORGANIC-SOLVENTS; TEXTILE DYES; OXIDATION SO - Journal of Industrial Microbiology & Biotechnology 2002 ;29(5):214-220 7048 UI - 11328 AU - varez-Borrego J AU - Mourino-Perez RR AU - Cristobal-Perez G AU - Pech-Pacheco JL AD - CICESE, Div Fis Aplicada, Dept Opt, Ensenada 22860, Baja California, MexicoCSIC, Inst Opt, Imaging & Vis Dept, E-28006 Madrid, SpainAlvarez-Borrego, J, CICESE, Div Fis Aplicada, Dept Opt, Km 107 Carretera, Ensenada 22860, Baja California, Mexico TI - Invariant recognition of polychromatic images of Vibrio cholerae O1 AB - Cholera is an acute intestinal infectious disease. It has claimed many lives throughout history, and it continues to be a global health threat. Cholera is considered one of the most important emergence diseases due its relation with global climate changes. Automated methods such as optical systems represent a new trend to make more accurate measurements of the presence and quantity of this microorganism in its natural environment. Automatic systems eliminate observer bias and reduce the analysis time. We evaluate the utility of coherent optical systems with invariant correlation for the recognition of Vibrio cholerae O1. Images of scenes are recorded with a CCD camera and decomposed in three RGB channels. A numeric simulation is developed to identify the bacteria in the different samples through an invariant correlation technique. There is no variation when we repeat the correlation and the variation between images correlation is minimum. The position-, scale-, and rotation-invariant recognition is made with a scale transform through the Mellin transform. The algorithm to recognize Vibrio cholerae 01 is the presence of correlation peaks in the green channel output and their absence in red and blue channels. The discrimination criterion is the presence of correlation peaks in red, green, and blue channels. (C) 2002 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Spain PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000175139500014 L2 - scale transform;Vibrio cholerae O1;image processing;correlation function;FLUORESCENT-MONOCLONAL-ANTIBODY; ENUMERATION; ENVIRONMENT; BACTERIA; SALINITY; SURVIVAL; GROWTH SO - Optical Engineering 2002 ;41(4):827-833 7049 UI - 7127 AU - varez-Celorio MDLD AU - Yeshurun I AU - Reategui G AU - Guerrero-Naranjo J AU - Magdalenic R AU - Fromow-Guerra J AU - Quiroz-Mercado H AD - Retina APEC, Mexico City, DF, MexicoEdith Wolfson Med Ctr, Holon, Israel TI - Intravitreal triarricinolone acetonicle (Kenalog) for the prevention of visual loss associated with scatter photocoagulation and macular laser treatment, in patients with combined, macular edema and advanced diabetic retinopathy MH - Israel MH - Mexico|Distrito Federal PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606600513 SO - Investigative Ophthalmology & Visual Science 2002 ;43():U107-U107 7050 UI - 11749 AU - varez-Cordero R AD - Clin Weight Control & Surg Treatment Obes, Mexico City, DF, MexicoAlvarez-Cordero, R, Hosp Angeles Pedregal, Periferico Sur 3697,Torre Angeles,Comnsultario 63, Bangkok 10700, Thailand TI - From paleo-surgeons to cyber-surgeons MH - Mexico|Distrito Federal MH - Thailand PB - TORONTO: F D-COMMUNICATIONS INC RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Article AV - English IS - 0960-8923 UR - ISI:000173917800004 SO - Obesity Surgery 2002 ;12(1):10-13 7051 UI - 10721 AU - Vargas-Barron J AU - Castillo-Mora G AU - Lopez-Meneses M AU - Roldan FJ AU - Romero-Cardenas A AU - Keirns C AU - Espinola-Zavaleta N AU - Zabalgoitia M AD - Inst Nacl Cardiol Dr Ignacio Chavez, Mexico City 14080, DF, MexicoUniv Texas, Hlth Sci Ctr, San Antonio, TX, USAVargas-Barron, J, Inst Nacl Cardiol Dr Ignacio Chavez, Juan Badiano 1,Colonia Secc 16, Mexico City 14080, DF, Mexico TI - Comparison of short- and long-term benefits of reperfusion in single-vessel inferior wall acute myocardial infarction with and without right ventricular wall infarction AB - The presence of right ventricular (RV) infarction and diabetes mellitus are the major determinants of cardiovascular events during the acute phase in patients with a single-vessel right coronary artery inferior wall myocardial infarction. However, long-term prognosis is excellent as long as immediate myocardial reperfusion is achieved, irrespective of the form of reperfusion and the presence of RV involvement MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000176930800011 L2 - THROMBOLYTIC THERAPY; CORONARY ANGIOPLASTY; INVOLVEMENT; FREQUENCY; DIAGNOSIS; PROGNOSIS; TRIAL SO - American Journal of Cardiology 2002 ;90(2):144-+ 7052 UI - 11238 AU - Vargas-Hernandez C AU - de Melo O AU - Hernandez-Carderon I AD - CINVESTAV, Phys Dept, Mexico City 07000, DF, MexicoNatl Univ Colombia, Fac Sci, Bogota, ColombiaVargas-Hernandez, C, CINVESTAV, Phys Dept, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Photoluminescence study of ultra-thin CdSe quantum wells AB - CdSe ultra-thin quantum wells (UTQWs) with thickness in the 0.5 to 4 monolayers (ML) range were grown by pulsed beam epitaxy (PBE) between barriers of ZnSe at substrate temperatures of 260 and 290 C. In each sample, five similar QWs separated by barriers around 200Angstrom thick were deposited onto a 5000 A buffer layer of ZnSe. During the growth process, the surface was monitored in-situ by reflection high energy electron diffraction (RHEED); a 2D growth mode was observed in all the UTQWs. The analysis of the streak positions in the RHEED patterns indicated a critical thickness around 1.5 ML. The photoluminescence (PL) experiments exhibited intense and narrow peaks in the blue-green region of the spectra. The energy of the PL peaks presented a clear dependence on growth temperature and QW thickness. The emission of the UTQWs grown at 290 degreesC was blue-shifted in comparison to those grown at 260 degreesC. The PL peaks of the samples show the presence of different transitions, which cannot be explained in terms of thickness fluctuations MH - Colombia MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000175278300010 L2 - MICROSCOPY; DOTS SO - Physica Status Solidi B-Basic Research 2002 ;230(2):331-334 7053 UI - 10724 AU - Vargas-Requena CL AU - Hernandez-Santoyo A AU - Yepiz-Plascencia G AU - Vargas-Albores F AU - Higuera-Ciapara I AU - Rodriguez-Romero A AU - Soulages JL AU - Sotelo-Mundo RR AD - Ctr Invest Alimentac & Desarrollo, Marine Biotechnol Lab, Hermosillo 83000, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoOklahoma State Univ, Dept Biochem & Mol Biol, Stillwater, OK 74078, USA TI - Biophysical evidence of lipid and carbohydrate binding activities of shrimp high density lipoprotein/beta glucan binding protein AB - Crustacean High Density Lipoprotein/beta-Glucan Binding Protein (HDL/BGBP) has been studied due to its role in nutrition and immune response via activation of the defense cells (hemocytes) upon binding 1,3-D-beta-glucan carbohydrates. In this study, HDL/BGBP was found to be composed mainly of beta sheets, as determined by circular dichroism. Lipoprotein aggregation resulted when HDL/BGBP interacted with phospolipid vesicles, laminaribiose (1,3-beta-glucan disaccharide) or heparin. HDL/BGBP has similar dissociation constants for laminaribiose (K-d=22 mM) or heparin (K-d=46 mM) as determined by 90degrees light scattering MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - HILVERSUM: BENTHAM SCIENCE PUBL LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0929-8665 UR - ISI:000176784200009 L2 - BETA-1,3-GLUCAN RECOGNITION PROTEIN; CRAYFISH PACIFASTACUS-LENIUSCULUS; CIRCULAR-DICHROISM SPECTRA; PENAEUS-CALIFORNIENSIS; SECONDARY STRUCTURE; VANNAMEI BOONE; PLASMA HDL; HEMOLYMPH; INSECT; PURIFICATION SO - Protein and Peptide Letters 2002 ;9(4):337-344 7054 UI - 9421 AU - Vargas CE AU - Hirsch JG AU - Draayer JP AD - Grand Accelerateur Natl Ions Lourds, F-14076 Caen 5, FranceUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, CE, Grand Accelerateur Natl Ions Lourds, BP 5027, F-14076 Caen 5, France TI - Excited bands in odd-mass rare-earth nuclei AB - Normal parity bands in Gd-157, Dy-163, and Tm-169 are studied using the pseudo-SU(3) shell model. Energies and B(E2) transition strengths of states belonging to six low-lying, same-parity rotational bands in each nuclei are considered. The pseudo-SU(3) basis includes states with pseudospin 0 and 1, and 1/2 and 3/2, for even and odd nucleon numbers, respectively. States with pseudospin 1 and 3/2 must be included for a proper description of some excited bands MH - France MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000180279900020 L2 - HEAVY DEFORMED-NUCLEI; SHELL-MODEL DESCRIPTION; NORMAL PARITY BANDS; SCISSORS MODE; PSEUDOSPIN; STRENGTHS; SYMMETRY SO - Physical Review C 2002 ;66(6): 7055 UI - 12018 AU - Vargas CE AU - Hirsch JG AU - Draayer JP AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, CE, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Quasi-SU(3) truncation scheme for odd-even and odd-odd sd-shell nuclei AB - The quasi-SU(3) symmetry, as found in shell-model calculations, refers to the dominance of the single-particle plus quadrupole-quadrupole terms in the Hamiltonian used to describe well-deformed nuclei, and to the subspace relevant in its diagonalization. It provides a very efficient basis truncation scheme. It is shown that a small number of SU(3) coupled irreps, those with the largest C-2 Values within the direct product of the proton and neutron SU(3) irreps with spin 0 and I (for even number of particles), and spin 1/2 and 3/2 for (for odd number of nucleons), are enough to describe the low-energy spectra, B(E2) transition strengths and band structure of Ne-21, Na-23 and Mg-25 odd-mass and Na-22, Na-24, Al-26 and Al-28 odd-odd nuclei. A simple but realistic Hamiltonian is employed. Results compare favorably both with experimental data and with full shell-model calculations. Limitations and possible improvements of the schematic Hamiltonian are discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000173152500005 L2 - NORMAL PARITY BANDS; MODEL DESCRIPTION; PF-SHELL; PSEUDO-SU(3) MODEL; DEFORMED-NUCLEI; ENERGY-LEVELS; LIGHT-NUCLEI; MONTE-CARLO; A NUCLEI; QUADRUPOLE SO - Nuclear Physics A 2002 ;697(3-4):655-688 7056 UI - 10020 AU - Vargas G AU - Perez JC AU - Mendez J AU - Mendez M AU - Pena P AD - CINVESTAV, Unidad Saltillo, Saltillo, Coahuila, MexicoInst Ceram & Vidrio, Madrid, SpainVargas, G, CINVESTAV, Unidad Saltillo, Saltillo, Coahuila, Mexico TI - Microwave foaming of sodium silicate-ortodibasic calcium phosphate mixtures AB - The effect of microwave application on the thermal behaviour, volume change, size and pore size distribution as well as chemical reactions and dissolution of sodium silicate/dibasic calcium phosphate ceramic (DCF) samples have been analysed. Ceramics foams with porosities between 71 and 79 wt% and pore sizes ranging from 10 to 200 microns have been obtained. After 90 seconds the temperature of samples reach about 130 degreesC with a weight loss of 23 wt%. Differences in the proportion of DCF in the initial mixture originate changes in volume and different chemical compounds in the final obtained foams. Additions of 10, 20 and 30 wt% of DCF originates volume increases of 350, 300 and 250 % respectively. In foam samples with 30 wt% of DCF, heated by microwave during 90 sec., the amount of the new compound beta-NaCaPO4 was about 42.9 wt%. The other component of this sample, 57.1 wt%, was DCF. Dissolution tests were made, using one gram of sample, in 100 ml of distilled water. The dissolution of 10 wt% DCF foamed samples, after 20 days into water, were 900 ppm/gr of Na and 2.7 ppm/gr of Ca. In samples with 30 wt% of DCF the dissolution were 470 ppm/gr and 5 ppm/gr for Na and Ca respectively MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000178777300008 L2 - ceramic foams;microwaves;sodium silicate;calcium phosphate SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2002 ;41(5):481-486 7057 UI - 11454 AU - Vargas R AU - Garza J AU - Hay BP AU - Dixon DA AD - Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoDixon, DA, Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA TI - Conformational study of the alanine dipeptide at the MP2 and DFT levels AB - Conformations of an important model system, the alanine dipeptide, have been calculated by using high-level, ab initio electronic structure theory. A Ramachandran plot, with the angle phi in the range -180degrees to 90degrees and the angle V) in the range -60degrees to 180degrees, was generated by using density functional theory with the generalized-gradient BLYP functional and a polarized triple-zeta basis set (TZVP+). Six conformers, C7,q, C5, C7(ax), beta(2), alpha(L), and alpha', have been identified in this region of the Ramachandran plot. A second derivative (frequency) analysis showed that all conformers are stable at this level of theory. These structures were used as starting points for geometry optimizations at the MP2/aug-cc-pVDZ level. Single-point energies were calculated at the MP2/aug-cc-pVTZ and MP2/aug-cc-pVQZ levels at the final MP2/aug-cc-pVDZ structures and together with the MP2/aug-cc-pVDZ results were used in extrapolations to the complete basis set limit. The N-H...O, N-H...N, and C-H...O hydrogen bond interactions that are key to the energetics are discussed. In general, the results obtained at the BLYP/TZVP+, MP2/aug-cc-pVDZ, MP2/aug-cc-pVTZ//aug-cc-pVDZ, and MP2/aug-cc-pVQZ//aug-cc-pVDZ levels are in reasonable agreement with each other, except for the beta(2) conformation for which there are significant differences in the structures. Although the same stability order is obtained at all levels of theory that were used, there are significant differences in the magnitude of the relative conformational energies MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 50 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000174793100023 L2 - MOLECULAR WAVE-FUNCTIONS; LOW-ENERGY CONFORMERS; AQUEOUS-SOLUTION; FORCE-FIELD; AB-INITIO; BENCHMARK CALCULATIONS; HYDROGEN-BOND; NUCLEIC-ACIDS; ABINITIO SCF; BASIS-SETS SO - Journal of Physical Chemistry A 2002 ;106(13):3213-3218 7058 UI - 11246 AU - Vasilopoulos P AU - Kushwaha MS AD - Concordia Univ, Dept Phys, Montreal, PQ H3G 1M8, CanadaUniv Autonoma Puebla, Inst Phys, Puebla 72570, MexicoVasilopoulos, P, Concordia Univ, Dept Phys, 1455 Maisonneuve Blvd O, Montreal, PQ H3G 1M8, Canada TI - Magnetic-field enhancement of the current instability in field-effect transistors AB - A theoretical investigation. within the framework of hydrodynamics, is made of the plasma-wave instability mechanism in a two-dimensional electron fluid in a field-effect transistor in the presence of a perpendicular magnetic field B. Scattering by impurities and or phonons, termed external friction, is accounted for by adding a damping term to the equation of motion. The treatment is valid for a nondegenerate electron fluid in which the mean free path for interelectronic collisions is much smaller than the device length and the mean free path due to impurities and or phonons. We show that a relatively low DC current should be unstable because of magnetoplasma-wave amplification due to reflection from the device boundaries. As in the absence of the field B. the instability occurs for 0 < v(0) < s and v(0) < -s, where v(0) is the local electron velocity and s the plasma wave velocity. The field B enhances this instability considerably. as the imaginary part of the wave increases with B, and can outbalance the stabilizing role of the external friction. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000175206300119 L2 - field-effect transistor;current-instability;terahertz frequencies;MECHANISM; DC SO - Physica E-Low-Dimensional Systems & Nanostructures 2002 ;12(1-4):482-486 7059 UI - 10214 AU - Vazquez-Flota F AU - De Luca V AU - Carrillo-Pech M AU - Canto-Flick A AU - Miranda-Ham MD AD - Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Chuburna 97200, Merida Yucatan, MexicoBrock Univ, Dept Biol, St Catharines, ON L2S 3A1, Canada TI - Vindoline biosynthesis is transcriptionally blocked in Catharanthus roseus cell suspension cultures AB - Catharanthus roseus cell cultures were exposed to different conditions in order to induce alkaloid metabolism. The exposure to jasmonate and fungal elicitors resulted in the transcriptional activation of tryptophan decarboxylase and in the accumulation of the monoterpenoid indole alkaloids ajmalicine and catharanthine, but not of vindoline. The inability of the cell cultures to produce vindoline was related to a lack of expression of the desacetoxyvindoline 4-hydroxylase (D4h) gene. Southern blot analysis revealed that D4h gene was not lost in the cell cultures MH - Canada MH - Mexico|Yucatan PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1073-6085 UR - ISI:000178200200001 L2 - alkaloids;Catharanthus roseus;cell cultures;desacetoxyvindoline 4-hydroxylase;tryptophan decarboxylase;TRYPTOPHAN DECARBOXYLASE; ALKALOID BIOSYNTHESIS; MOLECULAR-CLONING; GENES; INDUCTION; PATHWAY SO - Molecular Biotechnology 2002 ;22(1):1-8 7060 UI - 10796 AU - Vazquez-Macias A AU - Martinez-Cruz P AU - Castaneda-Patlan MC AU - Scheidig C AU - Gysin J AU - Scherf A AU - Hernandez-Rivas R AD - IPN, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07360, DF, MexicoInst Pasteur, Unite Biol Interact Hote Parasite, CNRS, URA 1960, F-75724 Paris, FranceUniv Aix Marseille 2, Fac Med, Unite Parasitol Expt, URA,IPP,UNIV MED,IMTSSA,EA3282, F-13385 Marseille, FranceHernandez-Rivas, R, IPN, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Apartado Postal 14-740, Mexico City 07360, DF, Mexico TI - A distinct 5 ' flanking var gene region regulates Plasmodium falciparum variant erythrocyte surface antigen expression in placental malaria AB - The Plasmodium falciparum multigene var family codes for approximately 50 variant adhesive proteins expressed in a mutually exclusive manner at the surface of infected red blood cells (iRBCs). Switching expression of var genes can lead to fundamental changes in the adhesive and antigenic properties of iRBCs. For example, a specific phenotypic switch in adhesion from CD36 to chondroitin sulphate A (CSA) is associated with malaria pathogenesis in pregnant women. The factors and DNA elements that control the expression of a particular member of the var gene family during gestational malaria remains enigmatic. Here, we report that the subtelomeric FCR3 var CSA is expressed under the control of a unique DNA element of 1.8 kb, whereas the other members of the var multigene family are flanked by common regulatory elements. The 5' var CSA-type element is conserved as a single copy in laboratory strains and clinical isolates from Brazil and West Africa and contains two distinct repetitive elements of 150 bp and 60 bp respectively. The 5' var CSA-type sequence tags a var gene in the 3D7 genome that is homologous to the FCR3 var CSA gene. A recombinant DBL gamma domain of this var gene showed specific binding to CSA. This subtelomeric var CSA gene is transcribed in the opposite sense when compared with the usual orientation of telomere-adjacent var genes. This unique arrangement might explain why the var CSA gene is relatively conserved in genetically distinct parasites despite being located in a highly recombinogenic chromosome compartment. The 5' untranslated region (UTR) of the var CSA-type sequence is also transcribed in placental isolates that bind to CSA, illustrating an important role for the unique 5' var CSA-type sequence in the regulation of var genes involved in malaria pathogenesis in pregnant women. However, this promoter is not always found to be transcribing var genes selected for expression of products that bind to CSA in vitro. Our work identifies a sequence tag for the identification of var CSA genes in placental isolates for the first time MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000176529800014 L2 - CHONDROITIN-SULFATE-A; INFECTED ERYTHROCYTES; MEMBRANE PROTEIN-1; ADHESION; TRANSCRIPTION; RECOMBINATION; ANTIBODIES; CELLS SO - Molecular Microbiology 2002 ;45(1):155-167 7061 UI - 10260 AU - Vazquez B AU - Torres-Martinez LM AU - Alvarez N AU - Vente JF AU - Quintana P AD - IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, Nuevo Leon, MexicoUniv La Habana, Havana, CubaQuintana, P, IPN, CINVESTAV, Dept Appl Phys, Unidad Merida,Km 6 Antigua Carretera Progreso, Merida 97310, Yucatan, Mexico TI - Subsoliclus phase equilibria in the system CaO-Al2O3-CoO and the crystal structure of novel Ca3CoAl4O10 AB - The subsolidus phase diagram, CaO-Al2O3-CoO, and its phase relations below 1300degreesC have been studied in air. The stability regions of nine subsolidus compatibility triangles were established and a new ternary phase was found. The structure of this compound, Ca3CoAl4O10 (orthorhombic, space group Pbc2(1), a = 5.1452(2) Angstrom, b = 16.7731(5) A, c = 10.7055(3) Angstrom), was determined from X-ray diffraction data and found to be isostructural with Ca3ZnAl4O10. This is an open framework compound with three crystallographically different channels, each wit a diameter of similar to3.5 Angstrom. The two end members of the binary CoO-CaO system are surrounded by small regions of solid solutions. Lab color parameters were measured in several compositions. No ternary phases were found when Co was substituted by other divalent cations such as Sr, Ba, Mn, Ni, Cu, Cd, Sn and Pb. (C) 2002 Elsevier Science (USA) MH - Cuba MH - Mexico|Nuevo Leon MH - Mexico|Yucatan PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000177932800023 L2 - phase diagram;cobalt calcium-aluminates;X-ray diffraction;Rietveld analysis;color measurements;ONE-DIMENSIONAL CA3CO2O6; PART; AL2O3-MGO-CAO SO - Journal of Solid State Chemistry 2002 ;166(1):191-196 7062 UI - 10997 AU - Vazquez FG AU - Sharma VK AU - Perez-Cruz L AD - Florida Inst Technol, Dept Chem, Melbourne, FL 32901, USANatl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Mexico City 04510, DF, MexicoSharma, VK, Florida Inst Technol, Dept Chem, 150 W Univ Blvd, Melbourne, FL 32901 USA TI - Concentrations of elements and metals in sediments of the southeastern Gulf of Mexico AB - This paper deals with the extent of contamination in sediments of the southeast Gulf of Mexico. The concentration of elements (SiO2, Al2O3, Fe2O3, Na2O, MgO, CaO, and K2O) and heavy metals (Cu, Cd, Zn, Co, Pb, Ag, Cr, Ni, V, and Ba) were determined. The elemental composition of sediments is influenced by the Grijalva-Usumacinta-Terminos System at the east and the Tabasco lagoon system (El Carmen-La Machona) at the west coast of the study area. Concentrations of Ni, V, and Ba were anomalously high at some sites. Oil production activities in the vicinity of the sites may be responsible for the high values. Correlations of metal concentrations to elemental composition were performed. No significant relationships between metals and elements were found for most metals (p>0.05), suggesting that metals are not significantly associated with naturally occurring aluminosilicates, iron hydroxide, and calcium carbonate minerals of sediments. Other sources such as organic matter may be contributing to the total concentration of metals. The comparison of metal content in sediments of the southeast Gulf of Mexico with metals of the other areas of the Gulf of Mexico suggests that it is relatively contaminated with Cd, Pb, and Ni. The probable causes of contamination are briefly discussed MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000176038700005 L2 - contamination;elements;metals;sediments;southeast Gulf of Mexico;OF-MEXICO; MARINE-SEDIMENTS; TRACE-METALS; HEAVY-METAL; POLLUTION; ESTUARY; HISTORY; LAGOONS; TEXAS; BAY SO - Environmental Geology 2002 ;42(1):41-46 7063 UI - 10090 AU - Vazquez GJ AU - Avendano C AU - Reyes JA AU - Del Castillo-Mussot M AU - Spector H AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoIIT, Chicago, IL 60616, USAVazquez, GJ, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Stark effect in a finite region for a 1D Coulomb potential AB - We calculate the states of a one-dimensional hydrogen atom under the effect of an electric field (Stark effect) in the strong field regime being the field confined in a finite region of width 2a (capacitor region). We find numerically the solution inside the capacitor and match it to an analytical solution outside the capacitor. Although the electric field tends to separate the two opposite charges particles, the total energy of the system decreases with increasing electric field strength. Our results are useful as a guideline to study strong electric field effects in electronic states of impurities or excitons in 1D systems MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000178447400043 L2 - ELECTRONIC STATES; SEMICONDUCTOR SO - Surface Review and Letters 2002 ;9(5-6):1827-1830 7064 UI - 10736 AU - Vazquez GV AU - Townsend PD AD - Univ Sussex, Brighton BN1 9QH, E Sussex, EnglandCtr Invest Opt, Leon 37000, Gto, MexicoTownsend, PD, Univ Sussex, Brighton BN1 9QH, E Sussex, England TI - Improvements of ion implanted waveguides in Nd : YAG and LiNbO3 using pulsed laser anneals AB - Pulsed laser annealing has been used to modify the surface and refractive index profiles of ion implanted waveguides formed in Nd:YAG and LiNbO3 crystals. Major improvements are seen in the niobate guides where losses are reduced, better refractive index confinement occurs in the garnet. The improvements depend on laser pulse power and the number of pulses, since prolonged laser treatments can introduce Surface damage in the niobate, and/or emphasise the problems of surface instability on the garnet. The improvements in waveguide loss and surface quality are encouraging and optimisation of the laser conditions should enhance the waveguide performances. (C) 2002 Published by Elsevier Science B.V MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000176692300020 L2 - pulsed laser anneals;optical waveguides;surface SHG;LiNbO3;Nd : YAG;2ND-HARMONIC GENERATION; WAVE-GUIDES SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2002 ;191():110-114 7065 UI - 11080 AU - Vazquez N AU - Aguilar C AU - Arau J AU - Caceres RO AU - Barbi N AU - Gallegos JA AD - Inst Tecnol Celaya, Dept Elect Engn, Celaya, MexicoCENIDET, Dept Elect Engn, Cuernavaca, Morelos, MexicoUniv Los Andes, Dept Elect Elect & Commun, Merida, VenezuelaUniv Fed Santa Catarina, Power Elect Inst, Florianopolis, SC, BrazilIPN, CINVESTAV, Dept Elect Engn, Mexico City, DF, MexicoVazquez, N, Inst Tecnol Celaya, Dept Elect Engn, Celaya, Mexico TI - A novel uninterruptible power supply system with active power factor correction AB - This paper presents a simplified sinusoidal uninterruptible power supply (UPS) system. The proposed scheme includes features such as high power factor, low total harmonic distortion and good dynamic response at the ac output voltage. In addition. the scheme has the desirable characteristics of high efficiency, simple circuit and low cost compared with a traditional standalone multiple stages UPS with power factor correction. The paper also presents the circuit operation, the analysis and, experimental results of the proposed UPS scheme. The proposed UPS approach is a good solution in low power applications (less than or equal to500 W) MH - Brazil MH - Mexico|Guanajuato MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Venezuela PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8993 UR - ISI:000175822700011 L2 - VARIABLE STRUCTURE CONTROL SO - Ieee Transactions on Power Electronics 2002 ;17(3):405-412 7066 UI - 10363 AU - Vazquez R AU - Miranda LF AU - Torrelles JM AU - Olguin L AU - Benitez G AU - Rodriguez LF AU - Lopez JA AD - UNAM, Astron Inst, Ensenada 22800, Baja California, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainCSIC, IEEC, Barcelona, SpainCSIC, Inst Ciencias Espacio, Barcelona, SpainNatl Autonomous Univ Mexico, Astron Inst, Mexico City 04510, DF, MexicoUABC, Fac Ciencias, Ensenada 22800, Baja California, MexicoUNAM, Astron Inst, Morelia 58089, Michoacan, MexicoVazquez, R, UNAM, Astron Inst, Apartado Postal 877, Ensenada 22800, Baja California, Mexico TI - Multiwavelength observations of the peculiar planetary nebula IC 2149 AB - We report high- and low-dispersion spectroscopy, optical imaging, and high-resolution Very Large Array-A lambda3.6 cm continuum observations of the peculiar planetary nebula IC 2149. These observations show that bipolar is a suitable morphological classification for IC 2149. Most nebular material is concentrated in a knotty, bright ring seen edge-on, embedded in an apparently oblate ellipsoidal shell from which remnant or incipient bipolar lobes emerge. We confirm the previously reported depletion in heavy elements and deduce a very low ejected nebular mass less than or similar to0.03 M.. All this information indicates that the formation of IC 2149 is the result of the evolution of a low-mass central star MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000177804800022 L2 - ISM : kinematics and dynamics;planetary nebulae : individual (IC 2149);stars : AGB and post-AGB;RESOLUTION SPECTRA; KINEMATICS; EVOLUTION; STARS; JETS SO - Astrophysical Journal 2002 ;576(2):860-869 7067 UI - 11230 AU - Vecchio FJ AU - de la Pena OAH AU - Bucci F AU - Palermo D AD - Univ Toronto, Dept Civil Engn, Toronto, ON, CanadaUniv Panamericana Guadalajara, Guadalajara, Jalisco, MexicoVecchio, FJ, Univ Toronto, Dept Civil Engn, Toronto, ON, Canada TI - Behavior of repaired cyclically loaded shearwalls AB - Two large-scale, wide-flanged shear walls were subjected to reversed cyclic displacements, resulting in the web elements sustaining heavy damage. The walls were repaired by removing and replacing the damaged concrete, and then were reloaded. Test results indicate that there can be a near full restoration of the walls' strength, stiffness, and energy dissipation characteristics, However it is shown that the repair scheme, strength of the repair concrete, and residual damage in the unrepaired zones can have a significant influence on subsequent behavior, particularly in altering the mode of failure. It is also shown that properly accounting for previous loading, residual damage, and repair sequence is critical to obtaining accurate predicted responses from analytical procedures. The data from this test series, augmenting other data available in the literature, will be useful in calibrating improved analytical methods as they are developed MH - Canada MH - Mexico|Jalisco PB - FARMINGTON HILLS: AMER CONCRETE INST RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Engineering, Civil;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0889-3241 UR - ISI:000175346700010 L2 - concrete;repair;shearwalls;test;WALLS SO - Aci Structural Journal 2002 ;99(3):327-334 7068 UI - 11333 AU - Vega-Carrillo HR AU - Iskander FY AU - Manzanares-Acuna E AD - UAZ, Ctr Reg Estudios Nucl, Zacatecas 98000, MexicoUniv Texas, Nucl Engn Teaching Lab, Austin, TX 78712, USAVega-Carrillo, HR, UAZ, Ctr Reg Estudios Nucl, Apdo Postal 336, Zacatecas 98000, Mexico TI - Elemental content in ground and soluble/instant coffee AB - The concentration of thirty-four elements in twelve coffee brands has been measured using instrumental neutron activation analysis. The samples investigated included four brands of commercially available ground coffee and eight brands of soluble/instant coffee. The elements measured were Al, As, Ba, Ca. Ce, Co, Cr, Cs, Dy, Eu, Fe Gd, Hf, K. La, Lu, Mg, Mn, Na, Rb, Sb, Sc, Se, Sin, Sr, Ta, Tb, Th, Ti, Tm, U, V, Yb and Zn. Twenty four elements were found to be below the detection limit in one or more samples. These elements were Ce, Cr, Fe, V, As, Eu, Ba. Dy, Gd. Hf, La. Lu. Sb, Sc, Se, Sm Sr, Ta, Th, Th, Ti, Yb, Tm and U MH - Mexico|Zacatecas MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000175134900011 L2 - NEUTRON-ACTIVATION ANALYSIS; PLANTS SO - Journal of Radioanalytical and Nuclear Chemistry 2002 ;252(1):75-80 7069 UI - 11449 AU - Vega-Lopez S AU - Conde-Knape K AU - Vidal-Quintanar RL AU - Shachter NS AU - Fernandez ML AD - Univ Connecticut, Dept Nutr Sci, Storrs, CT 06269, USAColumbia Univ, Coll Phys & Surg, Dept Med, Div Prevent Med & Nutr, New York, NY, USAUniv Sonora, Dept Invest & Posgrado Alimentos, Hermosillo, Sonora, MexicoVega-Lopez, S, Univ Connecticut, Dept Nutr Sci, 3624 Horsebarn Rd Extens,U-17, Storrs, CT 06269 USA TI - Sex and hormonal status influence the effects of psyllium on lipoprotein remodeling and composition AB - We evaluated the influence of sex and hormonal status on the effect of psyllium (PSY) supplementation on parameters of plasma lipoprotein metabolism. Twenty-four men, 23 premenopausal women, and 21 postmenopausal women (PMW) were randomly assigned to a fiber supplement (15 g PSY/d) or a control, provided via cookies, in a crossover design. Plasma lipids, insulin, apoprotein (apo) B, apo Cl, apo CIII, and apo E concentrations and the composition and size of low-density lipoprotein (LDL) and very-low-density lipoprotein (VLDL) particles were measured at the end of each 30-day treatment period. Compared with control, PSY intake decreased plasma LDL cholesterol by an average of 8% (P <.0001) in men and pre- and PMW. There was a fiber-sex/hormonal status interaction on plasma triglycerides (TG) in the response to the intervention. Men had a 17% decrease in TG, while PMW had a 16% increase with PSY (P <.01). Plasma levels of apo C III, apo E, and insulin followed the same pattern as plasma TG with PSY consumption and decreased by an average of 12% in men (P <.05), but increased by 10% in PMW (P <.05). These reductions in apoproteins suggest an increased peripheral removal of TG in men, perhaps due to decreased insulin resistance, while in PMW, the increases in apoproteins may be related to an enhanced VLDL production. The lack of effect of PSY on VLDL metabolism in premenopausal women could be associated with the protective effect of estrogen. No prominent changes in VLDL and LDL composition were observed with PSY intake other than an increase in LDL phospholipid (P <.05). In addition, compared with men and PMW, the amount of TG per VLDL particle was less, and VLDL diameter was smaller in premenopausal women [P <.05). These results indicate an important role of sex and hormonal status in determining the effects of PSY on lipoprotein metabolism. Copyright 2002, Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Sonora PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 6 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0026-0495 UR - ISI:000174820900019 L2 - LOW-DENSITY-LIPOPROTEIN; CORONARY HEART-DISEASE; DIETARY SOLUBLE FIBER; APOLIPOPROTEIN-C-III; GUINEA-PIGS; HYPOLIPIDEMIC MECHANISMS; CARDIOVASCULAR-DISEASE; INSULIN-RESISTANCE; TRANSFER PROTEIN; PLASMA LDL SO - Metabolism-Clinical and Experimental 2002 ;51(4):500-507 7070 UI - 11372 AU - Vega E AU - Reyes E AU - Sanchez G AU - Ortiz E AU - Ruiz M AU - Chow J AU - Watson J AU - Edgerton S AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoDesert Res Inst, Reno, NV 89512, USAPacific NW Natl Lab, Richland, WA 99352, USAVega, E, Inst Mexicano Petr, Eje Cent Lazaro Cardenas Num 152,Col San Bartolo, Mexico City 07730, DF, Mexico TI - Basic statistics of PM2.5 and PM10 in the atmosphere of Mexico city AB - The high levels of fine particulate matter in Mexico City are of concern since they may induce severe public health effects as well as the attenuation of visible light. Sequential filter samplers were used at six different sites from 23 February to 22 March 1997. The sampling campaign was carried out as part of the project 'Investigacion sobre Materia Particulada y Deterioro Atmosferico-Aerosol and Visibility Evaluation Research'. This research was a cooperative project sponsored by PEMEX and by the US Department of Energy. Sampling sites represent the different land uses along the city, the northwest station, Tlalnepantla, is located in a mixed medium income residential and industrial area. The northeast station, Xalostoc, is located in a highly industrialized area, Netzahualcoyotl is located in a mixed land use area, mainly commercial and residential. Station La Merced is located in the commercial and administrative district downtown. The southwest station is located in the Pedregal de San Angel, in a high-income neighborhood, and the southeast station located in Cerro de la Estrella is a mixed medium income residential and commercial area. Samples were collected four times a day in Cerro de la Estrella (CES), La Merced (MER) and Xalostoc (XAL) with sampling periods of 6 h. In Pedregal (PED), Tlalnepantla (TLA) and Netzahualcoyotl (NEZ) sampling periods were every 24 It. In this paper the basic statistics of PM2.5 and PM10 mass concentrations are presented. The average results showed that 49, 61, 46, 57, 51 and 44% of the PM10 consisted of PM2.5 for CES, MER, XAL, PED, TLA and NEZ, respectively. The 24-h average highest concentrations of PM2.5 and PM10 were registered at NEZ (184 and 267 mug/m(3)) and the lowest at PED (22 and 39 mug/m(3)). The highest PM10 correlations were between XAL-CES (0.79), PED-TLA (0.80). In contrast, the highest PM2.5 correlations were between CES-PED (0.74), MER-CES (0.73) and TLA-PED (0.72), showing a lower correlation than the PM10 one. The results of the PM, from 12.00 to 18.00 h at CES and MER presented the highest variability and also the highest median concentrations, meanwhile XAL showed them from 06.00 to 12.00 h. The highest variability and median concentrations of PM2.5 were from 06.00 to 12.00 h for the three stations. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000175007600002 L2 - particulate matter;particulate matter measurements;Mexico City;data management SO - Science of the Total Environment 2002 ;287(3):167-176 7071 UI - 9981 AU - Vega WA AU - guilar-Gaxiola S AU - Andrade L AU - Bijl R AU - Borges G AU - Caraveo-Anduaga JJ AU - Dewit DJ AU - Heeringa SG AU - Kessler RC AU - Kolody B AU - Merikangas KR AU - Molnar BE AU - Walters EE AU - Warner LA AU - Wittchen HU AD - UMDNJ, Robert Wood Johnson Med Sch, Inst Qual Res & Training, New Brunswick, NJ 08901, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Sao Paulo, BR-05403010 Sao Paulo, BrazilNetherlands Inst Mental Hlth & Addict, Utrecht, NetherlandsMexican Inst Psychiat, Mexico City, DF, MexicoAddict Res Fdn, Ctr Addict & Mental Hlth, London, ON, CanadaUniv Michigan, Ann Arbor, MI 48106, USAHarvard Univ, Sch Med, Boston, MA, USASan Diego State Univ, San Diego, CA 92182, USAYale Univ, New Haven, CT 06510, USARutgers State Univ, New Brunswick, NJ 08901, USAMax Planck Inst Psychiat, D-80804 Munich, GermanyVega, WA, UMDNJ, Robert Wood Johnson Med Sch, Inst Qual Res & Training, 335 George St,3rd Floor,Liberty Plaza, New Brunswick, NJ 08901 USA TI - Prevalence and age of onset for drug use in seven international sites: results from the international consortium of psychiatric epidemiology AB - This study compares lifetime prevalence and age of first use (onset) for alcohol, cannabis, and other drugs in six international sites. Data from seven epidemiologic field surveys that used compatible instruments and study designs were compiled for cross-site analyses by the International Consortium of Psychiatric Epidemiology (ICPE). The world health organization's composite international diagnostic instrument (WHO-CIDI) and additional items were used to ascertain drug use in each site. Lifetime use rates were estimated for alcohol, cannabis, and other illicit drugs. Survival analyses were used to estimate age of onset. Study settings and main results: use of alcohol twelve or more times ranged in descending order from the Netherlands (86.3%), United States (71.7%), Ontario, Canada (71.6%); Sao Paulo, Brazil (66.1%), Munich, Germany (64.9%), Fresno, California (USA) (51.9%), to Mexico City (43.2%). Use of cannabis five or more times in a lifetime ranged from 28.8 in the United States to 1.7% in Mexico City, and other drugs ranged from United States (19.4%) to Mexico City (1.7%). Age of first use was similar across study sites. This study demonstrates the fundamental uniformity of onset patterns by age as contrasted with wide variations in lifetime prevalences across sites. Study findings suggest that drug use patterns may change among emigrating populations from low consumption nations as a consequence of international resettlement in nations with higher rates. Methodological limitations of the study along with recommendations for future international comparative research are discussed. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Brazil MH - Canada MH - Germany MH - Mexico|Distrito Federal MH - Netherlands MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 50 U4 - Substance Abuse;Psychiatry U5 - J;Article AV - English IS - 0376-8716 UR - ISI:000178798400006 L2 - alcohol;drugs;international;prevalence;onset;epidemiology;NATIONAL-COMORBIDITY-SURVEY; UNITED-STATES; ALCOHOL-CONSUMPTION; SUBSTANCE USE; YOUNG-ADULTS; GENDER DIFFERENCES; MEXICAN-AMERICANS; ABUSE; DEPENDENCE; DISORDERS SO - Drug and Alcohol Dependence 2002 ;68(3):285-297 7072 UI - 10531 AU - Velasco-Hernandez JX AU - Gershengorn HB AU - Blower SM AD - Univ Calif Los Angeles, Sch Med, Dept Biomath, Los Angeles, CA 90095, USAUniv Calif Los Angeles, Sch Med, UCLA AIDS Inst, Los Angeles, CA 90095, USAHarvard Univ, Sch Med, Boston, MA 02115, USAUAM Iztapalapa, Dept Matemat, San Bartolo, Atepehuacan, MexicoPIMAYC, Inst Mexicano Petroleo, San Bartolo, Atepehuacan, MexicoBlower, SM, Univ Calif Los Angeles, Sch Med, Dept Biomath, 10833 Le Conte Ave, Los Angeles, CA 90095 USA TI - Could widespread use of combination antiretroviral therapy eradicate HIV epidemics? AB - Current combination antiretroviral therapies (ARV) are widely used to treat HIV. However drug-resistant strains of HIV have quickly evolved, and the level of risky behaviour has increased in certain communities. Hence, currently the overall impact that ARV will have on HIV epidemics remains unclear. We have used a mathematical model to predict whether the current therapies: are reducing the severity of HIV epidemics, and could even lead to eradication of a high-prevalence (30%) epidemic. We quantified the epidemic-level impact of ARV on reducing epidemic severity by deriving the basic reproduction number (R-o(ARV)) R-o(ARV) specifies the average number of new infections that one HIV case generates during his lifetime when ARV is available and ARV-resistant strains can evolve and be transmitted; if R-o(ARV) is less than one epidemic eradication is possible. We estimated for the HIV epidemic in the San Francisco gay community (using uncertainty analysis), the present day value of R-o(ARV), and the probability of epidemic eradication. We assumed a high usage of ARV and three behavioural assumptions: that risky sex would (1) decrease, (2) remain stable, or (3) increase. Our estimated values of R-o(ARV) (median and interquartile range [IQR]) were: 0.90 (0.85-0.96) if risky sex decreases, 1.0 (0.94-1.05) if risky sex remains stable, and 1.16 (1.05-1.28) if risky sex increases. R-o(ARV) decreased as the fraction of cases receiving treatment increased. The probability of epidemic eradication is high (p=0.85) if risky sex decreases, moderate (p=0.5) if levels of risky sex remain stable, and low (p=0.13) if risky sex increases. We conclude that ARV can function as an effective HIV-prevention tool, even with high levels of drug resistance and risky sex. Furthermore, even a high-prevalence HIV epidemic could be eradicated using current ARV MH - USA MH - Mexico|Distrito Federal PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 35 U4 - Infectious Diseases U5 - J;Review AV - English IS - 1473-3099 UR - ISI:000177263800020 L2 - IMMUNODEFICIENCY-VIRUS TYPE-1; SENSITIVITY ANALYSIS; DRUG-RESISTANCE; COMPUTER-MODELS; TUBERCULOSIS EPIDEMICS; TRANSMISSION DYNAMICS; REVERSE-TRANSCRIPTASE; CONTAINING REGIMENS; INFECTED PATIENTS; SAN-FRANCISCO SO - Lancet Infectious Diseases 2002 ;2(8):487-493 7073 UI - 11841 AU - Velasco I AU - Tapia R AD - Univ Nacl Autonoma Mexico, Dept Neurociencias, Inst Fisiol Celular, Mexico City 04510, DF, MexicoVelasco, I, NINCDS, Mol Biol Lab, NIH, 36 Convent Dr,Bldg 36,Room 3C12, Bethesda, MD 20892 USA TI - High extracellular gamma-aminobutyric acid protects cultured neurons against damage induced by the accumulation of endogenous extracellular glutamate AB - The glutamate uptake inhibitor L-trans-2,4-pyrrolidine-dicarboxylate (PDC) induces glutamate accumulation and neuronal damage in cultured cells. We have used dissociated cortical cells in culture to study whether the toxicity induced by inhibiting glutamate uptake with PDC could be blocked by the simultaneous inhibition of gamma-aminobutyric acid (GABA) uptake, because both types of transporters are affected during an ischemic event. After 6 hr of exposure to 100 muM GABA or to four different GABA uptake inhibitors, the concentration of extracellular GABA was augmented from the basal 2 muM value to about 25 muM and 5 muM, respectively. These increases, however, did not result in protection against the neuronal damage induced by the accumulation of extracellular glutamate because of the simultaneous exposure to PDC. In contrast, when 100 muM GABA and an inhibitor of GABA uptake were added, after 6 hr the concentrations of GABA reached 50 muM, and neurons were protected from PDC-induced toxicity. The addition of the GABA(A) and GABA(B) receptor agonists muscimol and baclofen also partially protected against PDC-induced damage. The results suggest that the excitotoxic damage resulting from chronic gradual elevation of extracellular glutamate may be prevented by high concentrations of extracellular GABA, an effect mediated by activation of GABA(A) and GABA(B) receptors. (C) 2002 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0360-4012 UR - ISI:000173607500015 L2 - glutamate uptake;GABA uptake;neurotoxicity;neuronal culture;pyrrolidine dicarboxylate;EXCITOTOXIC CELL-DEATH; RAT CORTICAL CULTURES; HIPPOCAMPAL-NEURONS; GLUCOSE DEPRIVATION; CEREBRAL-ISCHEMIA; QUANTAL BIOASSAY; IN-VITRO; GABA; INHIBITION; NEUROTOXICITY SO - Journal of Neuroscience Research 2002 ;67(3):406-410 7074 UI - 7675 AU - Velasco M AU - Velasco F AU - Brito F AU - Velasco AL AU - Nguyen JP AU - Marquez I AU - Boleaga B AU - Keravel Y AD - Natl Med Ctr, IMSS, Dept Med Res Neurophysiol, Mexico City 04000, DF, MexicoGen Hosp, Dept Stereotact & Funct Neurosurg, Mexico City 04000, DF, MexicoHosp Henri Mondor, Dept Neurosurg, Creteil, FranceClin Londres, Dept Magnet Resonance Imaging, Mexico City, DF, MexicoVelasco, M, Natl Med Ctr, IMSS, Dept Med Res Neurophysiol, Callejon Escondida 67,Colonia Villa Coyoacan, Mexico City 04000, DF, Mexico TI - Motor cortex stimulation in the treatment of deafferentation pain. I. Localization of the motor cortex AB - MRI and electrophysiological techniques to localize the primary motor cortex (MC) were performed on patients considered for MC stimulation for the treatment of deafferentation pain. The representation and trajectory of the rolandic fissure (RF) were accurately localized by external cranial landmarks and radiopaque fiducials superimposed on oblique MRI sections. In addition, the scalp distribution of the corticocortical responses elicited by V acute epidural stimulation [motor cortex (MC) in frontal and sensory cortex (SC) in parietal scalp regions], and analgesic responses at-the topographical. representation of the painful periphery elicited by subacute epidural stimulation were found to be simple and reliable procedures to localize MC, SC and RF. Copyright (C) 2002 S. Karger AG, Basel MH - France MH - Mexico|Distrito Federal PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences;Neuroimaging;Surgery U5 - J;Article AV - English IS - 1011-6125 UR - ISI:000184685900002 L2 - motor cortex localization;electrical stimulation;deafferentation pain;SOMATOSENSORY EVOKED-POTENTIALS; CHRONIC ELECTRICAL-STIMULATION; NEUROPATHIC PAIN; SEIZURES; COMPONENTS; TOPOGRAPHY; PET SO - Stereotactic and Functional Neurosurgery 2002 ;79(3-4):146-167 7075 UI - 11187 AU - Velazquez-Cedeno MA AU - Mata G AU - Savoie JM AD - Inst Ecol, AC Dept Hongos, Xalapa 91000, Veracruz, MexicoINRA, Unit Rech Champignons, F-33883 Villenave Dornon, FranceMata, G, Inst Ecol, AC Dept Hongos, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Waste-reducing cultivation of Pleurotus ostreatus and Pleurotus pulmonarius on coffee pulp: changes in the production of some lignocellulolytic enzymes AB - Fruiting body production for one strain of Pleurotus ostreatus and three strains of P. pulmonarius was evaluated on coffee pulp pasteurized at 80 degreesC for 1 h. Based upon three harvests per strain, the single P. ostreatus line was found to display a 40-day culture cycle, whereas the three P. pulmonarius strains completed their cycles after more than 50 days of incubation. These time periods were notably shorter than those observed in previous studies using other growth substrates. Nevertheless, yields expressed as biological efficiencies were not significantly different among strains, fluctuating between 125 and 138%. Extracellular enzymatic activity was also monitored for P. ostreatus and P. pulmonarius (one strain only). To do this, samples of mycelium-bearing substrate were taken every 4 days throughout the incubation period. Care was taken to represent all developmental stages, including primordial and fruiting bodies. Samples were either lyophilized and then analysed or, in some cases, analysed immediately without lyophilization. Hydrolase activity (i.e. endoglucanase (CMC) and cellobiohydrolase (CBH)) was found to depend on developmental stage, showing peak production during fruiting body formation. On the other hand, oxidase activity-(i.e. laccase (LAC) and Mn-peroxidase (MnP)) was associated with phenol degradation. Nevertheless, in the case of oxidases developmental timing differences were also observed. Specifically, LAC activity was detected as early as 8 days after inoculation in non-lyophilized samples, whereas MnP appeared near the end of the incubation period. No LAC activity was observed in lyophilized samples. This study concludes that coffee pulp might be successfully employed in the cultivation of mushrooms, not only because important extracellular enzymes are produced by mushrooms when grown upon this substrate, but also because the abbreviated cultivation cycle associated with this medium favours commercial processes. Commercialization might be further improved if strains specifically adapted to this novel substrate are selected MH - France MH - Mexico|Veracruz PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000175407500005 L2 - biological efficiency;cellobiohydrolases;coffee pulp;endoglucanases;laccases;Mn-peroxidases;Pleurotus ostreatus;Pleurotus pulmonarius;LIGNINOLYTIC ENZYMES; DEGRADATION; GROWTH SO - World Journal of Microbiology & Biotechnology 2002 ;18(3):201-207 7076 UI - 10242 AU - Velazquez PF AU - Dubner GM AU - Goss WM AU - Green AJ AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaNatl Radio Astron Observ, Socorro, NM 87801, USAUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaVelazquez, PF, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Investigation of the large-scale neutral hydrogen near the supernova remnant W28 AB - The distribution and kinematics of neutral hydrogen have been studied in a wide area around the supernova remnant (SNR) W28. A 2.degrees5 x 2.degrees5 field centered at l = 6 .degrees5, b = 0degrees was surveyed using the Parkes 64 m radio telescope (half-power beamwidth of 14.'7 at lambda21 cm). Even though W28 is located in a complex zone of the Galactic plane, we have found different H I features, which are evidence of the interaction between W28 and its surrounding gas. An extended cold cloud with about 70 M. of neutral hydrogen was detected at the location of W28 as a self-absorption feature, near the local standard of rest velocity of +7 km s(-1). This H I feature is the atomic counterpart of the molecular cloud shown by previous studies to be associated with W28. From this detection, we can independently confirm a kinematical distance of about 1.9 kpc for W28. In addition, the neutral hydrogen observed in emission around the SNR displays a ringlike morphology in several channel maps over the velocity interval [-25.0, +38.0] km s(-1). We propose that these features are part of an interstellar H I shell that has been swept up by the supernova shock front. Emission from this shell is confused with unrelated gas. Hence, we derive an upper limit for the shell mass of 1200-1600 M., a maximum radius of the order of 20 pc, an expansion velocity of similar to30 km s(-)1, an initial energy of about 1.4-1.8 10(50) ergs, and an age of similar to3.3 x 10(4) yr. The preexisting ambient medium has a volume density on the order of 1.5-2 cm(-3). W28 is probably in the radiative evolutionary phase, although it is not possible to identify the recombined thin neutral shell expected to form behind the shock front with the angular resolution of the present survey MH - Argentina MH - Australia MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000178143400025 L2 - ISM : HI;ISM : individual (W28);ISM : structure;supernova remnants;MHZ OH MASERS; MOLECULAR GAS; RADIO; DIRECTION; EMISSION; W44 SO - Astronomical Journal 2002 ;124(4):2145-2151 7077 UI - 10517 AU - Veliz FG AU - Moreno S AU - Duarte G AU - Vielma J AU - Chemineau P AU - Poindron P AU - Malpaux B AU - Delgadillo JA AD - Univ Autonoma Agr Antonio Narro, Dept Ciencias Med Vet, Torreon, Coahuila, MexicoUniv Autonoma Agr Antonio Narro, Dept Anim Prod, Torreon, Coahuila, MexicoUniv Tours, INRA, CNRS, UMR 6073, F-37380 Nouzilly, FranceUniv Nacl Autonoma Mexico, Ctr Neurobiol, Queretaro 76001, Qro, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoDelgadillo, JA, Univ Autonoma Agr Antonio Narro, Dept Ciencias Med Vet, Carretera Santa Fe & Perifer AP 940, Torreon, Coahuila, Mexico TI - Male effect in seasonally anovulatory lactating goats depends on the presence of sexually active bucks, but not estrous females AB - A study was conducted in subtropical northern Mexico (26degreesN) to determine whether the presence of estrous females can improve the response of seasonally anovulatory goats to the introduction of bucks in the group. The induction of estrous activity was studied in three groups of anovulatory lactating goats during seasonal anestrus. These females were of the Mexican Creole breed. In the control group (sexually inactive (SI), n = 20), two control (SI) bucks exposed to normal seasonal daylength variations were used. In the second group (SI + E, n = 20 + 3), two control mates were also used, but in addition, three females of the group were in estrus at the time of male introduction. In the third group (sexually active, SA + E, n = 19 + 4), anovulatory females were exposed to two bucks made sexually active by exposure to 2.5 months of long days (16L:8D) followed by two subcutaneous 18 mg melatonin implants, and four estrous females were also present when introducing the bucks. In all groups, males were introduced on 15 March and estrous detection was conducted twice daily for 15 days. The sexual activity of the bucks was observed from 08:00 to 10:00h during the first five days of exposure to females. More females displayed estrous behavior in the first 15 days following the introduction of the males in the SA + E group (18/19) as compared with the SI or SI + E groups (2/20 and 0/20, respectively; P < 0.001). No difference was observed between the two latter groups. Thirteen females of SA + E group showed a second estrus between days 6 and 11 (short estrous cycle duration: 5.4 +/- 0.4 days). By contrast, in the SI group none showed a second estrus. The sexual behavior of the males in the SA + E group was greater as compared with that of the males in SI and SI + E groups (over 80% of the total sexual activity recorded in the three groups; P < 0.001). By contrast, no differences were found between SI and SI + E males. These results indicate that the presence of estrous females alone at the time of buck introduction is not sufficient to induce an adequate stimulation of seasonally inactive males. The use of sexually active bucks is necessary to induce reproductive activity in anovulatory females, whereas preparation of the bucks with longs days followed by melatonin implants allows them to gain such a capacity. (C) 2002 Published by Elsevier Science B.V MH - France MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology U5 - J;Article AV - English IS - 0378-4320 UR - ISI:000177464400006 L2 - goat;reproductive seasonality;photoperiod;estrus;male effect;sexual behavior;SUBTROPICAL NORTHERN MEXICO; AUSTRALIAN CASHMERE GOAT; MALE CREOLE GOATS; REPRODUCTIVE ACTIVITY; RAM; OVULATION; EWES; INDUCTION; OVARIAN; STIMULATION SO - Animal Reproduction Science 2002 ;72(3-4):197-207 7078 UI - 10710 AU - Ventura E AU - Nearing MA AU - Amore E AU - Norton LD AD - Purdue Univ, USDA ARS, Natl Soil Eros Res Lab, W Lafayette, IN 47907, USAUniv Queretaro, Sch Engn, Hydraul Program, Queretaro 76010, MexicoDipartimento Ingn Civile & Ambientale, Sez Ingn Idraul & Sanitaria Ambientale, I-95125 Catania, ItalyNearing, MA, Purdue Univ, USDA ARS, Natl Soil Eros Res Lab, 1196 Soil Bldg, W Lafayette, IN 47907 USA TI - The study of detachment and deposition on a hillslope using a magnetic tracer AB - Soil erosion by water involves the processes of detachment, transport and deposition of soil materials by the erosive forces of raindrops and surface flow of water. The redistribution of sediment within a field-sized area is important in estimating the effect of erosion and deposition on productivity, in helping the conservation planner to target efforts to reduce erosion, and to evaluate erosion models. The objective of this study was to use a magnetic tracer, with size and density similar to soil aggregates, to study detachment and deposition on a hillslope. Two interconnected plots were established on a hillslope. Two rainfall intensities (35 and 70 min h(-1)) combined with two different inflow rates (4 and 101 min(-1)) were applied to the upper of the two plots. No rain or water was applied to the lower plot, which was used to study the deposition of eroded sediments from the upper plot. A 5% concentration of magnetic tracer was placed in the upper plot and mixed to depth of 3 cm. From this initial condition, areas of tracer detachment and deposition were identified using a magnetic sensor. Areas of detachment were associated with a decrease in magnetic signal, while areas of deposition were associated with an increase in the magnetic signal. In the lower plot, deposition of tracer correlated well with the magnetic susceptibility readings. Results indicated that the tracer was effective for identifying areas of net detachment and deposition, however, the tracer to soil ratio did not remain constant for all treatments. For this reason, a wider range of sizes and densities of the tracer should be tested if the method is to be useful to quantify erosion rates. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Italy MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Soil Science;Water Resources U5 - J;Article AV - English IS - 0341-8162 UR - ISI:000176876100002 L2 - soil erosion;sediment;deposition;rainfall simulator;tracer;ESTIMATING SOIL-EROSION; RATES; BE-10 SO - Catena 2002 ;48(3):149-161 7079 UI - 11959 AU - Verastegui E AU - Morales R AU - Barrera JL AU - Mueller A AU - Hadden J AU - Guzman B AU - Meneses A AU - Alfaro G AD - Inst Nacl Cancerol, Dept Immunol, Mexico City 14000, DF, MexicoInst Nacl Cancerol, Div Surg, Mexico City 14000, DF, MexicoInst Nacl Cancerol, Div Pathol, Mexico City 14000, DF, MexicoUniv Dusseldorf, Dept Radiat Oncol, D-40225 Dusseldorf, GermanyUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 014000, DF, MexicoVerastegui, E, Inst Nacl Cancerol, Dept Immunol, Avenida San Fernando 22, Mexico City 14000, DF, Mexico TI - Immunological approach in the evaluation of regional lymph nodes of patients with squamous cell carcinoma of the head and neck AB - In cancer, regional lymph node (LN) cells are one of the first components of the immune system to have contact with tumor cells or their products. Therefore, the phenotype and functional properties of hematopoietic cells present within the tumor-draining LN are important to understanding their role in the control of malignant cells. Based on the locoregional metastatic behavior of squamous cell carcinoma of the head and neck (SCCH&N) region, we analyzed tumor-draining lymph nodes from SCCH&N patients to obtain insights into regional tumor immunity. Using a three-color fluorescent labeling technique, surface antigen expression was visualized in mononuclear cells of lymph nodes that were obtained from head and neck cancer patients and compared to mononuclear cells of normal lymph nodes. Cell cycle analyses were performed using propidium iodide. Proliferation after phytohemagglutinin stimulation was measured by a sodium tetrazolium-based assay. LN histology was correlated with flow cytometric findings. Regional lymph nodes of head and neck cancer patients undergo morphologic and functional changes. Flow cytometry revealed a decrease in CD8(+) T cells and in some lymph nodes the presence of second or third populations of larger cells with distinct size and granularity that expressed both T (gammadelta/alphabeta) and different natural killer cell markers. Moreover, cell cycle analyses and proliferation assays showed a diminished response to mitogenic stimuli. These changes were found in both metastatic and hyperplastic lymph nodes from head and neck cancer patients; however, no alterations were found in control lymph nodes or peripheral blood mononuclear cells from noncancer patients. The immune alterations detected in lymphocytes present within the draining lymph nodes of head and neck cancer patients may improve our understanding of how tumor cells escape host immunosurveillance. However, this dysfunction in local draining lymph nodes may not be detected systemically. (C) 2001 Elsevier Science MH - Germany MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Immunology U5 - J;Article AV - English IS - 1521-6616 UR - ISI:000173384400007 L2 - head and neck;cancer;lymph nodes;flow cytometry;T-cell subsets;NK1.1(+) T-CELLS; GERMINAL-CENTERS; IN-VIVO; CANCER; MEMORY; MICROENVIRONMENT; SUPPRESSION; LYMPHOCYTES; DISSECTION; RESPONSES SO - Clinical Immunology 2002 ;102(1):37-47 7080 UI - 9747 AU - Verde-Star L AU - Srivastava HM AD - Univ Victoria, Dept Math & Stat, Victoria, BC V8W 3P4, CanadaUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoSrivastava, HM, Univ Victoria, Dept Math & Stat, Victoria, BC V8W 3P4, Canada TI - Some binomial formulas of the generalized Appell form AB - The authors aim here at finding all the generalizations of the binomial formula that are given by a generating-function of the generalized Appell form for a sequence of Newton polynomials. The formulas obtained include the well-known q-analogue of the binomial formula, several formulas involving hyperbolic functions, a trigonometric analogue, and some formulas involving the geometric and the exponential series. (C) 2002 Elsevier Science (USA). All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000179442700020 L2 - binomial formulas;appell generating-functions;Newton polynomials;q-exponential function;generalized Stirling numbers;q-binomial formula;divided difference functionals;recurrence relations;difference (and q-derivative) operators;STIRLING NUMBERS SO - Journal of Mathematical Analysis and Applications 2002 ;274(2):755-771 7081 UI - 11485 AU - Verdu M AU - Barron-Sevilla JA AU - Valiente-Banuet A AU - Flores-Hernandez N AU - Garcia-Fayos P AD - Univ Nacl Autonoma Mexico, UBIPRO ENEP Iztacala, Tlalnepantla 54090, MexicoCSIC, UV, Ctr Invest Sobre Desertif, E-46470 Albal, Valencia, SpainUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoVerdu, M, Univ Nacl Autonoma Mexico, UBIPRO ENEP Iztacala, Apartado Postal 310, Tlalnepantla 54090, Mexico TI - Mexical plant phenology: is it similar to Mediterranean communities? AB - The sclerophyllous, evergreen vegetation found in Mexico under tropical climate is named 'Mexical' (MEX) and presents many traits that have been thought to converge under a Mediterranean climate. Flowering phenology is strongly similar across Mediterranean-type ecosystems (MTEs) and this paper investigates MEX plant phenology in this context. The common history of the vegetation and the differences in the climatic conditions experienced by MEX and MTE taxi provide an ideal scenario to infer the relative importance of natural selection and historical constraints in the phenological response of plants to climatic conditions. This study has involved collecting field and bibliographic data on flowering phenology of MEX communities to detect (1) similarities at the community level between MTEs and MEX, (2) similarities between Tertiary and Quaternary taxi in MTEs and MEX, and (3) similarities between congeneric taxi from MEX and MTEs (taxi sharing a common ancestor but having evolved under different climates). Flowering in MEX does not occur mainly in spring, as in MTEs, but in summer, suggesting a response that maximizes water use in the rainy season. Flowering phenology of MEX species differed from their MTE congeneric species, suggesting that even though a common ancestor is shared, environmental pressures have led to different phenological responses in MEX and MTE plants. The flowering season for species that originated in the Tertiary and Quaternary did not differ in MEX, as expected, because of climatic uniformity along the whole time line. In MTEs, flowering differences between Tertiary and Quaternary species were not congruent, suggesting that the balance between the historical constraints and the selective farce of the Mediterranean climate is different among the three MTEs, and a particular explanation is needed for each. (C) 2002 The Linnean Society of London, Botanical Journal of the Linnean Society, 2002, 138, 297-303 MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000174806000003 L2 - chaparral;evolutionary convergence;matorral;maquis;Quaternary species;Tehuacan Valley;Tertiary species;FLOWERING PHENOLOGY; VEGETATION; EVOLUTION; CONVERGENCE; CONSTRAINTS; SHRUBLANDS; PATTERNS; HISTORY; CLIMATE; REGION SO - Botanical Journal of the Linnean Society 2002 ;138(3):297-303 7082 UI - 10445 AU - Verduzco JA AU - Hand RJ AU - Davies HA AD - Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandHand, RJ, UMSNH, Inst Invest Met, POB 888, Morelia 58000, Michoacan, Mexico TI - Fatigue behaviour of Fe-Cr-Si-B metallic glass wires AB - Cyclic compressive/tensile bending has been carried out on Fe-Cr-Si-B metallic glass wires using a controlled strain double pulley testing machine. The fatigue performance of two series of glassy alloy wires Fe79-xCrxSi10B12 and Fe77.5-xCrxSi7.5B15 have been compared with those of HT steel wires. Because of differences in modulus, the ranking of the materials studied changes according to whether the results are reported in terms of stress or strain. In terms of stress, the HT steel wire had a superior fatigue performance to the glassy wires; however, in terms of strain, the Fe69.5Cr8Si7.5B15 glassy wire, under higher cycle conditions, had a superior fatigue performance, to HT steel wire. The fatigue performance of the glassy wires improved with the partial substitution of Fe by Cr. The short fatigue life of the glassy wires containing zero or low Cr contents in the present study was at least partly due to the necked morphology along their lengths. Fractography revealed that corrosion pits nucleated on the surface of the wires and resulted in crack initiation at these points. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Michoacan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Mechanical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0142-1123 UR - ISI:000177478400008 L2 - amorphous alloy wires;fatigue testing of wires;fractography;MECHANICAL-PROPERTIES SO - International Journal of Fatigue 2002 ;24(10):1089-1094 7083 UI - 11156 AU - Vergara-Limon S AU - Cancelo G AU - Sheaff M AU - Vargas MA AD - Fermi Natl Lab, Batavia, IL 60510, USABUAP, Fac Math & Phys Sci, Puebla 72570, MexicoUniv Wisconsin, Dept Phys, Madison, WI 53706, USAVergara-Limon, S, Fermi Natl Lab, POB 500, Batavia, IL 60510, USA TI - Optical readout and control interface for the BTeV pixel vertex detector AB - Optical links will be used for sending data back and forth from the countering room to the detector in the data acquisition systems for future high energy physics experiments, including ATLAS and CMS in the LHC at CERN (Switzerland) and BTeV at Fermilab (USA). This is because they can be ultra-high speed and are relatively immune to electro-magnetic interference (EMI). The baseline design for the BTeB Pixel Vertex Detector includes two types of optical link, one to control and monitor and the other to read out the hit data from the multi-chip modules on each half-plane of the detector. The desigh and performance of the first prototype of the Optical Readout and Control Interface for the BTeV Pixel Vertex Detector is described. (C) 2002 Published by Elsevier Science B.V MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000175483400010 L2 - optoelectronic readout and control;ultrahigh-speed data transmission;Silicon pixel;FERMILAB SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;482(1-2):144-155 7084 UI - 9613 AU - Verma SP AD - Max Planck Inst Chem, Mainz, GermanyVerma, SP, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Privada Xochicalco S-N, Temixco 62580, Morelos, Mexico TI - Absence of Cocos plate subduction-related basic volcanism in southern Mexico: A unique case on Earth? AB - The relationship between volcanism and subduction of the Cocos plate is examined on the basis of new as well as published Sr, Nd, and Ph isotopic and geochemical data on late Miocene to Holocene (ca. 9-0 Ma) basic volcanic rocks from southern Mexico and Central America. Basic rocks (with SiO2 < 52%) were chosen in order to minimize the effects of crustal-assimilation processes and, therefore, to test the contribution from deeper sources: the subducted Cocos plate and the mantle wedge. By using fluid-mobile to relatively fluid-immobile elements and radiogenic isotope ratios for such rocks, I show that the subduction of the Cocos plate does not contribute to the basic volcanism in all of southern Mexico as opposed to that in Central America (from Guatemala to northwestern Costa Rica). South Mexican volcanism is related to ongoing rifting processes, inferred from field geology, seismology, gravity, tectonics, and volcano alignments. This lack of subduction relationship probably represents the first case on Earth where the ongoing subduction of an oceanic plate does not give rise to basic volcanism, such as is present throughout southern Mexico MH - Germany MH - Mexico|Morelos PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 15 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000179738400011 L2 - Mexico;Central America;subduction;rift;volcanism;geochemistry;CENTRAL-AMERICA; BENIOFF ZONE; COSTA-RICA; ARC; MAGMAS; BELT; GEOCHEMISTRY; LITHOSPHERE; INFERENCES; GEOMETRY SO - Geology 2002 ;30(12):1095-1098 7085 UI - 9712 AU - Viberti G AU - Mogensen C AU - Ritz E AU - Halimi S AU - Ruilope L AU - Jermendy G AU - Widimsky J AU - Sareli P AU - Taton J AU - Erdogan G AU - Rull J AD - Guys Hosp, Dept Endocrinol, London, EnglandAarhus Kommune Hosp, Med Dept M, Aarhus, DenmarkLudolf Krehl Klin, Fak Klin Med 1, Heidelberg, GermanyCHU Grenoble, Serv Endocrinol Diabetol & Maladies Nutr, F-38043 Grenoble, FranceHosp 12 Octubre, Consulta Nefrol, E-28041 Madrid, SpainBajcsy Zsilinsky Korhaz III Belosztaly, Budapest, HungaryIKEM, Prague, Czech RepublicUniv Witwatersrand, Baragwanath Hosp, Dept Cardiol, Johannesburg, South AfricaWewnetrznych Diabet AM, Katedra & Klin Chorob, Warsaw, PolandAnkara Univ, Tip Fak, Endokrinol Bilim Dali, TR-06100 Ankara, TurkeyInst Nacl Nutr, Delegac Tlalpan, Mexico City, DF, Mexico TI - Treatment based on a very low dose combination of perindopril and indapamide reduces albuminuria more effectively than enalapril in hypertensive Type 2 diabetic patients: the PREMIER study MH - Czech Republic MH - Denmark MH - United Kingdom MH - France MH - Germany MH - Hungary MH - Mexico|Distrito Federal MH - Poland MH - South Africa MH - Spain MH - Turkey PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000177813600191 SO - Diabetologia 2002 ;45():A65-A66 7086 UI - 11887 AU - Vicencio LJV AU - Khomenko AV AU - Valenzuela JLA AU - Cardoso R AU - Salazar D AU - Marquez H AU - Porte H AD - Ctr Invest Cient & Educ Ensenada, Mexico City, DF, MexicoLab Opt PM Duffieux, Besancon, FranceVicencio, LJV, Ctr Invest Cient & Educ Ensenada, Mexico City, DF, Mexico TI - Asymmetry of the output power of a symmetric Y-shaped integrated-optics splitter AB - This paper discusses features of the transmission of light along a symmetric Y-shaped waveguide operating as a 1 x 2 optical splitter. A detailed description is given of the design of the splitter. Using the Fourier ray approximation method, the effect of three factors on the splitting coefficient of the output energy is numerically analyzed: the length of the input waveguide and the transverse displacement and tilt angle of the input beam. (C) 2002 Optical Society of America MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 1070-9762 UR - ISI:000173631900014 L2 - ION-EXCHANGE; WAVE-GUIDES; GLASS; PROPAGATION; WAVEGUIDES SO - Journal of Optical Technology 2002 ;69(1):54-57 7087 UI - 11576 AU - Victal OA AU - Teerlink JR AU - Gaxiola E AU - Wallace AW AU - Najar S AU - Camacho DH AU - Gutierrez A AU - Herrera G AU - Zuniga G AU - Mercado-Rios F AU - Ratcliffe MB AD - San Francisco Vet Affairs Med Ctr, Cardiol Sect, San Francisco, CA 94121, USASan Francisco Vet Affairs Med Ctr, Sect Anesthesiol, San Francisco, CA 94121, USASan Francisco Vet Affairs Med Ctr, Sect Cardiothorac Surg, San Francisco, CA 94121, USASocial Secur Hosp, Guadalajara, Jalisco, MexicoUniv Calif San Francisco, Sch Med, San Francisco, CA 94143, USARatcliffe, MB, San Francisco Vet Affairs Med Ctr, Cardiol Sect, 112D,4150 Clement St, San Francisco, CA 94121 USA TI - Left ventricular volume reduction by radiofrequency heating of chronic myocardial infarction in patients with congestive heart failure AB - Background-Myocardial infarct expansion and left ventricular (LV) remodeling are integral components in the evolution of chronic heart failure and predict morbidity and mortality. Radiofrequency (RF) heating and patch placement of chronic LV aneurysms caused a sustained reduction in LV infarct area and volume in an ovine infarct model. This study evaluated the effect of RF heating and epicardial patch as an adjunct to coronary artery bypass graft on LV volumes in patients with prior myocardial infarction. evidence of akinetic/dyskinetic scar, and LV ejection fraction less than or equal to40%. Methods and Results-Ten patients (3 female: mean age. 64 +/- 11 years) scheduled for coronary artery bypass graft were enrolled (Canadian Cardiovascular Society angina class 2.1 +/- 1.1; New York Heart Association class 3.1 +/- 0.5). Intraoperative digital photography demonstrated an acute 39% reduction in infarct area (n=5 P=0.01), and transesophageal ECGs demonstrated a 16% acute reduction in LV end-diastolic volumes (n=9: P=0.002) after RF treatment. There were no intraoperative or procedure-related postoperative complications, and during an average follow-up of >180 days, there have been no safety issues. All patients had complete relief of their angina and improvement in exercise tolerance. Serial transthoracic ECGs over the 6 months of follow-up after RF treatment demonstrated persistent reductions in LV end-diastolic volume (29%: P<0.0001) and LV end-systolic volume (37%; P<0.0001) with improved ejection fraction (P<0.02). Conclusions-RF heating and patch placement in these 10 patients resulted in acute reduction in infarct area and ventricular volumes that were maintained 180 days after procedure. This technique may reduce the incidence of congestive heart failure and mortality in these patients and warrants investigation in larger clinical trials MH - USA MH - Mexico|Jalisco PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0009-7322 UR - ISI:000174535500011 L2 - heart failure;myocardial infarction;remodeling;surgery;cardiac volume;COLLAGENOUS TISSUE; DOUBLE-BLIND; DYSFUNCTION; CAPTOPRIL; SURVIVAL; MECHANICS; SHRINKAGE; MORTALITY; TRIALS SO - Circulation 2002 ;105(11):1317-1322 7088 UI - 9771 AU - Vidal J AU - de Melo O AU - Vigil O AU - Lopez N AU - Contreras-Puente G AU - Zelaya-Angel O AD - IPN, Dept Fis, Ctr Invest & Estud Avanzados, Mexico City 07360, DF, MexicoInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Havana, Fac Phys, IMRE, Havana 10400, CubaZelaya-Angel, O, IPN, Dept Fis, Ctr Invest & Estud Avanzados, POB 14-740, Mexico City 07360, DF, Mexico TI - Influence of magnetic field and type of substrate on the growth of ZnS films by chemical bath AB - Optical and structural characterization of ZnS thin films grown by chemical bath deposition (CBD), introducing for the First time a magnetic field (MF), are reported. Coming glass as well as Si and GaAs single crystals were used substrates, The effect of H-2-annealing, in the range of temperature 200-300 degreesC, and MF on the morphology and crystalline structure of films is studied in atomic force microscopy images and in X-ray diffractograms. MF does riot manifest appreciable influence on the grain size (GS) when glass substrates are used. On the contrary GS diminishes noticeably when MF is applied on ZnS/Si and ZnS/ GaAs CBD-growths. Further, an improvement of the optical properties with post-growth annealing in H-2, as exhibited by optical transmission, is obtained. An application of these ZnS films as antireflective coating is analyzed by reflectance spectra. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000179280400019 L2 - deposition process;semiconductors;structural properties;zinc sulfide;THIN-FILMS; SOLAR-CELLS; DEPOSITION; BUFFER SO - Thin Solid Films 2002 ;419(1-2):118-123 7089 UI - 10317 AU - Vieira MC AU - Heinze T AU - ntonio-Cruz R AU - Mendoza-Martinez AM AD - Univ Jena, Inst Organ Chem & Makromol Chem, D-07743 Jena, GermanyBerg Univ Gesamthsch Wuppertal, Fachbereich 9, D-42097 Wuppertal, GermanyInst Tecnol Madero, Div Estudios Posgrado & Invest, Ciudad Madero, Tam, Mexico TI - Cellulose derivatives from cellulosic material isolated from Agave lechuguilla and fourcroydes AB - Fibers isolated from Agave lechuguilla (lechuguilla) and fourcroydes (henequen) contain about 80% cellulose, 5% hemicellulose and 15% lignin. They are a renewable resource, interesting as feedstock for new products obtained by chemical functionalization. In the present paper the reactivity of such fibrous materials under typical conditions for modification of cellulose was studied. Treatment with n-octanol/aqueous NaOH of the fibers leads to an activated expanded gel-like material with enhanced accessibility. Carboxymethylation, sulfation, acetylation and tritylation reactions as well as subsequent carboxymethylation of the trityl derivative and selective oxidation of the primary hydroxyl function of carboxymethylated products with TEMPO/NaBr/NaClO were successfully carried out under conditions typical for cellulose reactions. The products were characterized by means of C-13-NMR and H-1-NMR spectroscopy and HPLC after complete depolymerization, by GPC, and by the determination of solubility MH - Germany MH - Mexico|Tamaulipas PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Paper & Wood;Materials Science, Textiles;Polymer Science U5 - J;Article AV - English IS - 0969-0239 UR - ISI:000177946900011 L2 - acetylation;agave fibers;carboxymethylation;selective oxidation;sulfation;tritylation;GRAFT-COPOLYMERIZATION; JUTE FIBERS; CHEMICAL MODIFICATION; ACRYLONITRILE SO - Cellulose 2002 ;9(2):203-212 7090 UI - 10712 AU - Vila J AU - Romero M AU - Rosas JM AD - Univ Jaen, Dept Psicol, Jaen 23071, SpainUniv Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Tlalnepantla 54090, Edo, MexicoRosas, JM, Univ Jaen, Dept Psicol, Paraje Lagunillas S-N, Jaen 23071, Spain TI - Retroactive interference after discrimination reversal decreases following temporal and physical context changes in human subjects AB - One experiment was conducted to test the additive effects of physical context changes and the passage of time oil a retroactive interference task in human subjects. Participants learned a discrimination in a symbolic matching to sample situation within a specific context. The discrimination was subsequently reversed. The context in which the reversal occurred was combined factorially with the passage of time before the test. All testing was conducted in the context in which the original discrimination was acquired. Participants had received the discrimination reversal in either a context different from that in which the original discrimination was acquired, or in the same context. Half of each of the groups mentioned above received testing immediately after reversal training and the other half received testing 48 h later. Both manipulations, changing the context after the reversal and the passage of time following the reversal, led to a recovery of the original discrimination performance. Participants that received both a context change and retention interval showed the largest recovery. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0376-6357 UR - ISI:000176853600005 L2 - RETENTION INTERVAL; CONDITIONED SUPPRESSION; SPONTANEOUS-RECOVERY; STIMULUS ATTRIBUTES; LATENT INHIBITION; MEMORY RETRIEVAL; TASTE-AVERSION; EXTINCTION; PARADOX; RESOLUTION SO - Behavioural Processes 2002 ;59(1):47-54 7091 UI - 10011 AU - Vilchis L AU - Rios L AU - Villalobos MA AU - Guyot A AD - CPE, CNRS, LCPP, Lab Chim & Procedes Polymerisat, F-69100 Villeurbanne, FranceUNAM, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, MexicoGirsa Corp SA CV, Ctr Invest & Desarrollo Tecnol, Mexico City, DF, MexicoSC Johnson Polymers, Racine, WI 53403, USAGuyot, A, CPE, CNRS, LCPP, Lab Chim & Procedes Polymerisat, 43 Bd 11 Novembre 1918,Batiment 308 F,BP 2077, F-69100 Villeurbanne, France TI - In situ syntheses of a suspension agent based on a styrene-acrylic acid copolymer for the suspension polymerization of styrene AB - We carried out the suspension polymerization of styrene, initiated with benzoyl peroxide at 80degreesC, in the presence of the simultaneous polymerization of acrylic acid in the water phase, initiated by potassium peroxidisulfate (KPS) at the same temperature. The polymerization in the water phase was started at certain times after the beginning of the polymerization of styrene. Then, a continuous addition of KPS was carried out at a given landing rate and during variable feeding times. The water-phase polymerization actually produced a copolymer of styrene and acrylic acid, which displayed surface-active properties. The particle size distribution depended on the variables mentioned earlier (starting time, KPS feeding rate, and addition time), being controlled by the molecular weight, and on the composition of the copolymer produced and its availability at the increasing conversion of styrene. A second distribution of submicronic particles was produced. Both families of particles had about the same molecular weight. (C) 2002, Wiley Periodicals, Inc MH - France MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000178711600010 L2 - particle size distribution;stabilization;water-soluble polymers;surfactants;STABILIZER; FLOW SO - Journal of Applied Polymer Science 2002 ;86(13):3271-3285 7092 UI - 10133 AU - Villa-Castillo J AU - Wagner MR AD - INIFAP, Cd Guzman, Jalisco, MexicoNo Arizona Univ, Sch Forestry, Flagstaff, AZ 86011, USAVilla-Castillo, J, INIFAP, Campo Expt Clavellinas, Cd Guzman, Jalisco, Mexico TI - Ground beetle (Coleoptera : Carabidae) species assemblage as an indicator of forest condition in northern Arizona ponderosa pine forests AB - Reintroduction of fire and thinning have been suggested as the main practices to regain forest health in northern Arizona ponderosa pine (Pinus ponderosa Dougl. ex Lawson) forests. Criteria for assessing the impact of such management practices in the forest are based oil benchmark reconstructed conditions resembling pre-European forest stand structure and on the enhancement of tree vigor. A range of forest conditions currently exists including stands that have been unmanaged, thinned only, thinned plus prescribed burned and burned by wildfire. A surrogate taxon was used to assess forest condition under criteria of maintaining habitat for native species operating at the soil level. We assessed changes occurring in ground beetle assemblages at the stand scale as related to changes that had occurred in forest stands previously treated with the above treatments. A pitfall-trapping scheme was deployed during the summer months of 1998, 1999, and 2000. A total of 4,452 specimens was caught representing 15 genera and 20 species of ground beetles. We found that species diversity increased as the level of disturbance increased. The indicator species assemblage found on the wildfire treatment was represented by species in the genera Amara and Harpalus that are characteristic of dry-open habitats. Unmanaged stands generally had the lowest diversity and the assemblage was dominated by the species Synuchus dubius (Leconte). The thinned only stands did not significantly vary from unmanaged stands in species assemblage. Cyclotrachelus constrictus (Say) was indicative of the thinning plus broadcast burned stands. Stands that were thinned plus burned were richer than both unmanaged and thinned only stands without a shift toward an open-area dominant assemblage as occurred in the stands burned by wildfire MH - Mexico|Jalisco MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000178325900007 L2 - Pinus ponderosa;Carabidae;forest health;forest management;thinning;prescribed fire;BOREAL FOREST; POSTFIRE REGENERATION; MANAGEMENT; RESTORATION; DIVERSITY; NEED; AREA; FIRE SO - Environmental Entomology 2002 ;31(2):242-252 7093 UI - 11326 AU - Villa F AU - Regalado LE AU - Ramos-Mendieta F AU - Gaspar-Armenta J AU - Lopez-Rios T AD - Ctr Invest Opt, Guanajuato 37150, MexicoUniv Sonora, Ctr Invest Fis, Hermosillo, Sonora, MexicoCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, FranceVilla, F, Ctr Invest Opt, Loma Bosque 115, Guanajuato 37150, Mexico TI - Photonic crystal sensor based on surface waves for thin-film characterization AB - A new sensor based on optical surface waves in truncated one-dimensional photonic crystals is proposed for use in determining the optical properties of metallic or dielectric thin films and bulk media, Specifically, the method of optical characterization takes into account the changes that the surface waves of a layered structure undergo when either a thin film of arbitrary material is added at the surface or the optical properties of transmission medium change. For the surface-wave excitation the Kretschmann configuration used in attenuated total reflectance is employed. (C) 2002 Optical Society of America MH - France MH - Mexico|Guanajuato MH - Mexico|Sonora PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 22 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000175116000028 L2 - PLASMON RESONANCE SO - Optics Letters 2002 ;27(8):646-648 7094 UI - 10744 AU - Villa HG AU - Voltolina D AU - Nieves M AU - Pina P AU - Ruiz JL AD - Univ Autonoma Sinaloa, Fac Ciencias Mar, Mazatlan, Sinaloa, MexicoUAS, CIBNOR, Lab Microalgas, Ctr Invest Biol Noroeste, Mazatlan, Sinaloa, MexicoUniv Cadiz, CASEM, Fac Ciencias Navales, Grp Invest Zeolitas Acuicultura, Cadiz, SpainVoltolina, D, UAS, CIBNOR, Lab Microalgas, Ctr Invest Biol Noroeste, POB 1132, Mazatlan, Sinaloa, Mexico TI - Use of artificial zeolites to reduce copper toxicity to two marine microalgae MH - Mexico|Sinaloa MH - Spain PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000176741800015 L2 - LEAD SO - Journal of the World Aquaculture Society 2002 ;33(2):214-219 7095 UI - 11307 AU - Villafuerte-Castrejon ME AU - Bucio L AU - Sanchez-Arjona A AU - Duque J AU - Pomes R AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Ctr Sci Res, Havana 6880, CubaVillafuerte-Castrejon, ME, Univ Nacl Autonoma Mexico, Inst Invest Mat, AP 70-360, Mexico City 04510, DF, Mexico TI - gamma-Sodium gallate: a Rietveld refinement using X-ray powder diffraction AB - Tetrahedrally coordinated oxides usually present polymorphism, but for NaGaO2, only the beta polymorph has been reported. In this work, the synthesis and structural characterization of gamma-sodium gallate, gamma-NaGaO2, are presented. The crystal structure belongs to the orthorhombic system, space group Pbca (No. 61), and has been characterized by a Rietveld refinement of the X-ray powder diffraction pattern. The structure is similar to those exhibited by the phases of many tetrahedral oxides MH - Cuba MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 0108-2701 UR - ISI:000175316400006 SO - Acta Crystallographica Section C-Crystal Structure Communications 2002 ;58():i69-I70 7096 UI - 11676 AU - Villafuerte-Castrejon ME AU - Villegas M AU - Caballero AC AU - Fernandez JF AU - Guzman-Mendoza J AU - Huanosta-Tera A AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCSIC, Inst Ceram & Vidrio, Dept Electroceram, Madrid 28500, SpainVillafuerte-Castrejon, ME, Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico TI - Influence of La3+on the microestructure of bismuth titanate solid solutions AB - In this work a solid solution of bismuth titanate Bi4Ti3O12 with La3+ is synthesised by coprecipitation of their hydroxides. The solid solutions were characterised by X-ray powder diffraction and density measurements. By SEM the influence of La3- in bismuth titanate was analised. In this study several compositions of the solid solution were prepared and sintered at 850 degreesC. The results are presented as a function of the dopant concentration MH - Mexico|Distrito Federal MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000174151200029 L2 - bismuth titanate;Aurivillius like structure;solid solution;ferroelectric;ELECTRICAL-CONDUCTIVITY SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2002 ;41(1):151-153 7097 UI - 12211 AU - Villafuerte-Castrejon ME AU - Castillo-Pereyra E AU - Ayala A AU - Tartaj J AU - Moure C AU - Duran P AU - Matutes-Aquino JA AU - Fuentes L AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCSIC, Inst Ceram & Vidrio, Madrid 28500, SpainCtr Invest Mat Avanzados, Chihuahua, MexicoVillafuerte-Castrejon, ME, Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Synthesis of FeAlO3 by coprecipitation AB - FeAlO3 is a material with an orthorhombic unit cell, space group Pna2(1), which exhibits an electromagnetic coupling. The main interest in this compound lies in the variety of its properties: ferrimagnetism, magnetoelectricity, piezoelectricity, and a strong magnetic anisotropy. The synthesis of FeAlO3 is very difficult due to the reduced area in the phase diagram Al2O3-Fe2O3. Several routes of fabrications have been tried. By using solid state reactions high temperatures have been required, and a rhomboedric hematite AlxFe2-xO3 appears as a second phase. Some authors have reported the synthesis by oxalic precursors using high temperatures where a very strict control on heating and cooling processes are also required to avoid the formation of a metastable defective ferrite derived from gamma -Fe2O3. In this work, the synthesis of FeAlO3 by coprecipitation is reported. Starting materials were aluminium and iron nitrates, and the precipitate was obtained adding to the mix solutions of NH4OH/H2O with different concentrations and pH control, Phase analysis were carried out by x-Ray powder diffraction. In addition, several heat treatments and stoichiometry variations were carried out to find the best conditions to obtain FeAlO3 as a pure single phase product and as solid solution with the formula Fe1-x Al1-xO3 MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Spain PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics;Materials Science, Composites U5 - S;Article AV - English IS - 1013-9826 UR - ISI:000172651400343 L2 - aluminium iron oxide;solid solution;ferrimagnetism;magnetoelectricity;piezoelectricity;coprecipitation SO - Euro Ceramics Vii, Pt 1-3 2002 ;206-2():1405-1407 7098 UI - 8945 AU - Villarreal-Calderon A AU - Acuna H AU - Villarreal-Calderon J AU - Garduno M AU - Henriquez-Roldan CF AU - Calderon-Garciduenas L AU - Valencia-Salazar G AD - Univ Nacl Autonoma Mexico, Fac Med, Programa NUCE, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Odontol, Mexico City 04510, DF, MexicoInst Tecnol, Mexico City, DF, MexicoEscuela Secundaria Tecn 11, Mexico City, DF, MexicoUniv Valparaiso, Fac Ciencias, Dept Estadist, Valparaiso, ChileUniv N Carolina, Curriculum Toxicol, Chapel Hill, NC, USASoc Mex Pediat, Mexico City, DF, MexicoValencia-Salazar, G, Ave Gabriel Mancra 1516-1, Mexico City, DF, Mexico TI - Assessment of physical education time and after-school outdoor time in elementary and middle school students in south Mexico City: The dilemma between physical fitness and the adverse health effects of outdoor pollutant exposure AB - Strategies to promote lifelong physical activity among children are needed to stem the adverse health consequences of inactivity. However, the health effects in growing children of long-term exposure to a polluted atmosphere are of deep concern. The atmosphere of south Mexico City (SMC) is characterized by a complex mixture of air pollutants, including ozone, particulate matter, and aldehydes. Radiological evidence suggests that small-airway disease could be present in clinically healthy, tobacco unexposed SMC children. The aim of this study was to assess, by means of a self-reported questionnaire, the physical education class times, daily outdoor after-school exposure time, and tobacco exposure in students attending public elementary and middle schools in SMC. Additionally, the time each student spent viewing television was assessed, and the authors measured each student's weight and height to determine body mass index (BMI, weight in kg divided by height in m(2)). The survey included 1,159 students in grades 7-9. The authors identified 2 critical periods of outdoor exposure in SMC children that coincided with significant concentrations of both ozone and particulate matter with diameters less than 10 micrometers (PM10): during school time after 11:00 A.M. and in the after-school outdoor activity period, usually extending from 1:00 P.M. to 6:00 P.M. Thirty-two percent of elementary and 61% of middle school students have physical education classes after 11:00 A.M. Students in SMC spend an average of 19.6 hr/wk outdoors in the after-school period, during which time they are engaged in light to moderate physical activities. Half of the students are exposed to tobacco smoke at home, and 7% of middle school students smoke. On the basis of BMI, 60% of students were classified as undernourished, overweight, or obese. No correlations were found between BMI and time spent viewing TV, time outdoors (on weekdays and weekends), or exposure to environmental tobacco smoke. Children and adolescents in SMC are participating in physical activities that enhance multiple components of health-related fitness. However, their activities occur outdoors, where they are exposed to high concentrations of air pollutants throughout the year. The authors believe that SMC children and adolescents must be educated, through both the school and health systems, regarding ways to obtain the necessary exercise while protecting themselves from the high concentrations of pollutants. Individuals should instruct and encourage young people to be involved in lifetime fitness activities and to eat balanced diets, if the goal is to control health-care costs, reduce disease incidence, and improve the overall quality of life of the Mexico City population MH - Chile MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000181523000011 L2 - children;outdoor pollutant exposure;ozone;physical education;particulate matter;south Mexico City;PARTICULATE AIR-POLLUTION; CALIFORNIA COMMUNITIES; PULMONARY-FUNCTION; AMBIENT OZONE; INHALABLE PARTICLES; RESPIRATORY HEALTH; PERSONAL EXPOSURE; DIFFERING LEVELS; PM10 POLLUTION; CHILDREN SO - Archives of Environmental Health 2002 ;57(5):450-460 7099 UI - 11916 AU - Villarreal NE AU - Kharisov BI AU - Ivanova II AU - Romanovskii BV AD - Univ Autonoma Nuevo Leon, Fac Ciencias Fisicomatemat, San Nicolas De Los Garza 66450, NL, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas De Los Garza 66450, NL, MexicoMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaVillarreal, NE, Univ Autonoma Nuevo Leon, Fac Ciencias Fisicomatemat, San Nicolas De Los Garza 66450, NL, Mexico TI - Optimal conditions of toluene alkylation by ethanol using pentasile zeolite as catalyst AB - The products of toluene alkylation (p-ethyltoluene (p-ET) and m-ethyltoluene (m-ET)) are used for the production of methylstyrenes. The polymers formed from methylstyrene have advantages in comparison with polystyrene: lower density and higher glass transition temperature [Styrene-Its Polymers, Copolymers and Derivatives, Reinhold, New York. 1952] [1]. Moreover, the production of polymethyl styrenes enables one to use toluene as a substitute of benzene in petrochemical synthesis [From Hydrocarbons to Petrochemicals, Gulf, Houston, 1981] [2]. As a result of the syntheses of high-silica zeolites (HSZs) of the type ZSM-5, a new process of selective production of p-ET and m-ET mixture, suitable for polymerization, has been developed (New Monomers and Polymers, New York, 1983, Catal. Rev. 26 (1984) 597] [3,4]. In this paper. the optimal conditions of alkylation of toluene by ethanol using pentasil zeolites as catalysts are described. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Nuevo Leon MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000173486300015 L2 - toluene alkylation by ethanol;pentasil zeolite;catalyst;optimal reaction conditions SO - Applied Catalysis A-General 2002 ;224(1-2):161-166 7100 UI - 10868 AU - Villarroel-Flores R AU - Webb P AD - Univ Minnesota, Sch Math, Minneapolis, MN 55455, USAUNAM, Inst Matemat, Mexico City, DF, MexicoWebb, P, Univ Minnesota, Sch Math, Minneapolis, MN 55455, USA TI - Some split exact sequences in the cohomology of groups AB - We analyze the split exact sequences of (co)homology groups associated to the spaces of Dwyer which give rise to the centralizer decomposition and subgroup decomposition of the classifying space BG of a finite group. In the first instance these sequences have infinite length. We show that they give rise to finite sequences which are also split and exact. The sequences arise as the first page of a spectral sequence. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0040-9383 UR - ISI:000176306000004 L2 - group cohomology;isotropy;homology decomposition;p-radical subgroup;elementary abelian subgroup;HOMOLOGY SO - Topology 2002 ;41(3):483-494 7101 UI - 10600 AU - Villata M AU - Raiteri CM AU - Kurtanidze OM AU - Nikolashvili MG AU - Ibrahimov MA AU - Papadakis IE AU - Tsinganos K AU - Sadakane K AU - Okada N AU - Takalo LO AU - Sillanpaa A AU - Tosti G AU - Ciprini S AU - Frasca A AU - Marilli E AU - Robb RM AU - Noble JC AU - Jorstad SG AU - Hagen-Thorn VA AU - Larionov VM AU - Nesci R AU - Maesano M AU - Schwartz RD AU - Basler J AU - Gorham PW AU - Iwamatsu H AU - Kato T AU - Pullen C AU - Benitez E AU - de Diego JA AU - Moilanen M AU - Oksanen A AU - Rodriguez D AU - Sadun AC AU - Kelly M AU - Carini MT AU - Miller HR AU - Catalano S AU - Dultzin-Hacyan D AU - Fan JH AU - Ishioka R AU - Karttunen H AU - Keinanen P AU - Kudryavtseva NA AU - Lainela M AU - Lanteri L AU - Larionova EG AU - Matsumoto K AU - Mattox JR AU - Montagni F AU - Nucciarelli G AU - Ostorero L AU - Papamastorakis J AU - Pasanen M AU - Sobrito G AU - Uemura M AD - Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, ItalyAbastumani Observ, GE-383762 Abastumani, Rep of GeorgiaAstrophys Inst Potsdam, D-14482 Potsdam, GermanyLandessternwarte Heidelberg Konigstuhl, D-69117 Heidelberg, GermanyUzbek Acad Sci, Ulugh Beg Astron Inst, Tashkent 700052, UzbekistanUniv Crete, Dept Phys, Iraklion 71003, Crete, GreeceFdn Res & Technol Hellas, IESL, Iraklion 71110, Crete, GreeceOsaka Kyoiku Univ, Inst Astron, Kashiwara, Osaka 5828582, JapanTuorla Observ, Piikkio 21500, FinlandUniv Perugia, Osservatorio Astron, I-06126 Perugia, ItalyOsserv Astrofis Catania, I-95123 Catania, ItalyUniv Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, CanadaBoston Univ, Inst Astrophys Res, Boston, MA 02215, USASt Petersburg State Univ, Inst Astron, St Petersburg 198504, RussiaIsaac Newton Inst Chile, St Petersburg Branch, St Petersburg, RussiaUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, ItalyUniv Missouri, Dept Phys & Astron, St Louis, MO 63121, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAKyoto Univ, Fac Sci, Dept Astron, Kyoto, JapanClarke & Coyote Astrophys Observ, Wilton, CA 95693, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoKyvaskylan Sirus RY, Nyrola Observ, Jyvaskyla 40950, FinlandGuadarrama Observ, Madrid 28409, SpainUniv Colorado, Dept Phys, Denver, CO 80217, USAWestern Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42104, USAGeorgia State Univ, Dept Phys & Astron, Atlanta, GA 30303, USAGuangzhou Univ, Ctr Astrophys, Guangzhou 510400, Peoples R ChinaFrancis Marion Univ, Dept Chem Phys & Astron, Florence, SC 29501, USAUniv Turin, Dipartimento Fis Gen, I-10125 Turin, ItalyVillata, M, Osserv Astron Torino, INAF, Via Osservatorio 20, I-10025 Pino Torinese, TO, Italy TI - The WEBT BL Lacertae Campaign 2000 AB - We present UBVRI light curves of BL Lacertae from May 2000 to January 2001, obtained by 24 telescopes in 11 countries. More than 15 000 observations were performed in that period, which was the extension of the Whole Earth Blazar Telescope (WEBT) campaign originally planned for July-August 2000. The exceptional sampling reached allows one to follow the flux behaviour in fine detail. Two different phases can be distinguished in the light curves: a first, relatively low-brightness phase is followed by an outburst phase, after a more than 1 mag brightening in a few weeks. Both the time duration (about 100 d) and the variation amplitude (roughly 0:9 mag) are similar in the two phases. Rapid flux oscillations are present all the time, involving variations up to a few tenths of mag on hour time scales, and witnessing an intense intraday activity of this source. In particular, a half-mag brightness decrease in about 7 h was detected on August 8-9, 2000, immediately followed by a similar to0.4 mag brightening in 1.7 h. Colour indexes have been derived by coupling the highest precision B and R data taken by the same instrument within 20 min and after subtracting the host galaxy contribution from the fluxes. The 620 indexes obtained show that the optical spectrum is weakly sensitive to the long-term trend, while it strictly follows the short-term flux behaviour, becoming bluer when the brightness increases. Thus, spectral changes are not related to the host galaxy contribution, but they are an intrinsic feature of fast flares. We suggest that the achromatic mechanism causing the long-term flux base-level modulation can be envisaged in a variation of the relativistic Doppler beaming factor, and that this variation is likely due to a change of the viewing angle. Discrete correlation function (DCF) analysis reveals the existence of a characteristic time scale of variability of similar to7 h in the light curve of the core WEBT campaign, while no measurable time delay between variations in the B and R bands is found MH - Canada MH - Finland MH - Germany MH - Greece MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China MH - Rep of Georgia MH - Russia MH - Spain MH - USA MH - Uzbekistan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000177116700002 L2 - galaxies : active;galaxies : BL Lacertae objects : general;galaxies : BL Lacertae objects : individual : BL Lacertae;galaxies : jets;quasars : general;1997 OUTBURST; OPTICAL OBSERVATIONS; RADIO VARIABILITY; OBJECTS; MICROVARIABILITY; PHOTOMETRY; BLAZARS; PERIODICITY; SPECTRUM; GALAXIES SO - Astronomy & Astrophysics 2002 ;390(2):407-421 7102 UI - 9568 AU - Villaver E AU - Manchado A AU - Garcia-Segura G AD - Inst Astrofis Canarias, E-38205 Tenerife, SpainSpace Telescope Sci Inst, Baltimore, MD 21218, USAConsejo Super Invest Cient, Madrid, SpainUNAM, Astron Inst, Ensenada 22800, Baja California, MexicoVillaver, E, Inst Astrofis Canarias, Via Lactea S-N, E-38205 Tenerife, Spain TI - The dynamical evolution of the circumstellar gas around low- and intermediate-mass stars. II. The planetary nebula formation AB - We have studied the effect of the mass of the central star (CS) on the gas evolution during the planetary nebula (PN) phase. We have performed numerical simulations of PN formation using CS tracks for six stellar core masses corresponding to initial masses from 1 to 5 M. The gas structure resulting from the previous asymptotic giant branch (AGB) evolution is used as the starting configuration. The formation of multiple shells is discussed in the light of our models, and the density, velocity, and H emission brightness profiles are shown for each stellar mass considered. We have computed the evolution of the different shells in terms of radius, expansion velocity, and H peak emissivity. We find that the evolution of the main shell is controlled by the ionization front rather than by the thermal pressure provided by the hot bubble during the early PN stages. This effect explains why the kinematical ages overestimate the age in young CSs. At later stages in the evolution and for low-mass progenitors the kinematical ages severely underestimate the CS age. Large (up to 2.3 pc), low surface brightness shells (less than 2000 times the brightness of the main shell) are formed in all of our models (with the exception of the 5 M. model). These PN halos contain most of the ionized mass in PNe, which we find is greatly underestimated by the observations because of the low surface brightness of the halos MH - Mexico|Baja California MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 33 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000179914300037 L2 - hydrodynamics;ISM : jets and outflows;ISM : structure;planetary nebulae : general;stars : AGB and post-AGB;stars : winds, outflows;RADIATION MAGNETOHYDRODYNAMICS CODE; GIANT BRANCH EVOLUTION; 2 SPACE DIMENSIONS; EXPANSION VELOCITIES; CHEMICAL ABUNDANCES; ASTROPHYSICAL FLOWS; STELLAR EVOLUTION; IONIZED MASSES; MODELS; KINEMATICS SO - Astrophysical Journal 2002 ;581(2):1204-1224 7103 UI - 11094 AU - Villaver E AU - Garcia-Segura G AU - Manchado A AD - Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, SpainUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoVillaver, E, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA TI - The dynamical evolution of the circumstellar gas around low- and intermediate-mass stars. I. The asymptotic giant branch AB - We have investigated the dynamical interaction of low- and intermediate-mass stars (from 1 to 5 M.) with their interstellar medium (ISM). In this first paper, we examine the structures generated by the stellar winds during the asymptotic giant branch (AGB) phase using a numerical code and the wind history predicted by stellar evolution. The influence of the external ISM is also taken into account. We find that the wind variations associated with the thermal pulses lead to the formation of transient shells with an average lifetime of similar to20,000 yr and, consequently, do not remain recorded in the density or velocity structure of the gas. The formation of shells that survive at the end of the AGB phase occurs via two main processes: shocks between the shells formed by two consecutive enhancements of the mass loss or continuous accumulation of the material ejected by the star in the interaction region with the ISM. Our models show that the mass of the circumstellar envelope increases appreciably because of the ISM material swept up by the wind (up to similar to70% for the 1 M. stellar model). We also point out the importance of the ISM on the deceleration and compression of the external shells. According to our simulations, large regions (up to 2.5 pc) of neutral gas surrounding the molecular envelopes of AGB stars are expected. These large regions of gas are formed from the mass loss experienced by the star during the AGB evolution MH - USA MH - Mexico|Baja California MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000175830800026 L2 - ISM : kinematics and dynamics;ISM : structure;planetary nebulae : general;stars : AGB and post-AGB;stars : mass loss;RADIATION MAGNETOHYDRODYNAMICS CODE; LONG-PERIOD VARIABLES; 2 SPACE DIMENSIONS; IRAS SURVEY DATA; PLANETARY-NEBULAE; AGB STARS; STELLAR EVOLUTION; DUST SHELLS; ASTROPHYSICAL FLOWS; ENVELOPES SO - Astrophysical Journal 2002 ;571(2):880-900 7104 UI - 10947 AU - Villegas J AU - Fortin JA AD - Univ Montreal, Inst Rech Biol Vegetale, Montreal, PQ H1X 2B2, CanadaVillegas, J, Univ Michoacana San Nicolas de Hidalgo, Inst Invest Quim Biol, Edificio B-3,Ciudad Univ, Morelia 58030, Michoacan, Mexico TI - Phosphorus solubilization and pH changes as a result of the interactions between soil bacteria and arbuscular mycorrhizal fungi on a medium containing NO3- as nitrogen source AB - The interactions between arbuscular mycorrhizal fungi and bacteria may affect the nutrient dynamics in the environment. To study these changes, assays were conducted in a two-compartment Petri plate system. A NO3--N medium containing an insoluble phosphate (P) source was used to evaluate the effect of Glomus intraradices (Schenck & Smith) external mycelium, mycorrhizal, and nonmycorrhizal transformed carrot roots (Daucus carrota L.), alone or in interaction with Pseudomonas aeruginosa (Schroeter) Migula, Pseudomonas putida (Trevisan) Migula, or Serratia plymuthica (Dyar) Bergey et al., on phosphorus solubilization and pH changes of the medium. In the NO3--containing medium, G. intraradices external mycelium as well as the three bacterial species studied were rather inefficient P solubilizers when growing individually. However, when G. intraradices external mycelium interacted with either P. aeruginosa or R putida, the levels of soluble P in the medium significantly increased (P less than or equal to 0.05). These improvements were closely related to changes in the pH of the medium MH - Canada MH - Mexico|Michoacan PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 10 U4 - Plant Sciences U5 - J;Article AV - English IS - 0008-4026 UR - ISI:000176189400014 L2 - Glomus intraradices;P solubitization;external mycelium;Pseudomonas aeruginosa;Pseudomonas putida;Serratia plymuthica;ROOT-INDUCED CHANGES; GLOMUS INTRARADICES; TRANSFORMED ROOTS; ROCK PHOSPHATE; RHIZOSPHERE; PLANTS; RHIZOBACTERIA; NUTRITION; MYCELIUM; CULTURE SO - Canadian Journal of Botany-Revue Canadienne de Botanique 2002 ;80(5):571-576 7105 UI - 11255 AU - Villoro MF AU - Plascencia JC AU - Nunez R AU - Menchaca-Rocha A AU - Hernandez JM AU - Camarillo E AU - Buenerd M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Grenoble 1, F-38026 Grenoble, FranceInst Nucl Sci, CNRS, IN2P3, F-38026 Grenoble, FranceMenchaca-Rocha, A, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Measurement of the dispersion law for hydrophobic silica aerogel SP-25 AB - Optical properties of hydrophobic silica aerogel SP-25 have been measured, These include: a seven point dispersion law n(lambda = 266.2 - 514.5 rim), absorbance, luminescence and other physical properties, The effect of chromatic dispersion on velocity resolution for an aerogel-based RICH counter was estimated. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000175245200019 L2 - Cherenkov counters;cosmic-ray detection;Cherenkov radiators;aerogel;refractive index;chromatic dispersion;CHERENKOV COUNTERS; RICH SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2002 ;480(2-3):456-462 7106 UI - 10756 AU - Vitela JE AU - Hanebutte UR AU - Gordillo JL AU - Cortina LM AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551, USAUniv Nacl Autonoma Mexico, Dir Gral Serv Comp Acad, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoVitela, JE, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Comparative performance study of parallel programming models in a neural network training code AB - This paper discusses the performance studies of a coarse grained parallel neural network training code for control of nonlinear dynamical systems, implemented in the shared memory and message passing parallel programming environments OpenMP and MPI, respectively. In addition, these codes are compared to an implementation utilizing SHMEM the native data passing SGI/Cray environment for parallel programming. The multiprocessor platform used in the study is a SGI/Cray Origin 2000 with up to 32 processors, which supports all these programming models efficiently. The dynamical system used in this study is a nonlinear OD model of a thermonuclear fusion reactor with the EDA-ITER design parameters. The results show that OpenMP outperforms the other two environments when large number of processors are involved, while yielding a similar or a slightly poorer behavior for small number of processors. As expected the native SGI/Cray environment outperforms MPI for the entire range of processors used. Reasons for the observed performance are given. The parallel efficiency of the code is always greater than 60% regardless of the parallel environment for the range of processors used in this study MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Physics, Mathematical U5 - J;Article AV - English IS - 0129-1831 UR - ISI:000176719400001 L2 - neural networks;parallel computing;message passing;shared memory;MPI;OpenMP;SHMEM;coarse grained parallelization;SGI/Cray Origin 2000 SO - International Journal of Modern Physics C 2002 ;13(4):429-452 7107 UI - 10516 AU - Vivas GFC AU - Parish TA AU - Curry GL AD - Inst Invest Elect, Temixco 62490, Morelos, MexicoIAEA, Dept Nucl Sci & Applicat, Vienna, AustriaTexas A&M Univ, Ind Engn Dept, College Stn, TX 77843, USAVivas, GFC, Inst Invest Elect, Av Reforma 113 Col Palmira, Temixco 62490, Morelos, Mexico TI - Optimization of MOX enrichment distributions in typical LWR assemblies using a simplex method-based algorithm AB - The enrichment distributions within light water reactor (LWR) fuel assemblies are optimized using a modified linear programming (SIMPLEX Method) technique initiated from a flat enrichment distribution until a target, maximum local power peaking factor is achieved. The optimum rod enrichment distribution when each rod is allowed to have its own individual enrichment (for this case the target, maximum local power peaking factor is 1.0) is obtained at an intermediate point of the optimization procedure. Later, the optimal locations and values for a reduced number of rod enrichments (groups) are obtained for an input target maximum local power peaking factor by applying sensitivity to change techniques. After an initial set of enrichment groups have been defined, interchanges of rods among neighboring groups are carried out to obtain the final assembly enrichment distribution. The optimization procedure is demonstrated by presenting results for both boiling water reactor (BWR) and pressurized water reactor (PWR) fuel assembly designs. Reactor-grade plutonium (with a fissile Pu fraction of 59.6%) and weapons-grade plutonium (with a fissile Pu fraction of 94.0%) were assumed to be the feed Pu material for the MOX fuel rods in the BWR and PWR examples, respectively. Hot-full-power-temperature and beginning-of-life conditions were also assumed in the example problems. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Austria MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0306-4549 UR - ISI:000177431400001 SO - Annals of Nuclear Energy 2002 ;29(17):2001-2017 7108 UI - 11786 AU - Vizcaino A AU - Campbell J AU - Litovsky S AU - Van Praagh R AD - Childrens Hosp, Dept Pathol, Boston, MA 02115, USAChildrens Hosp, Dept Cardiol, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA 02115, USAHosp Infantil Mexico Dr Federico Gomez, Dept Cardiol, Mexico City, DF, MexicoVan Praagh, R, Childrens Hosp, Dept Pathol, 300 Longwood Ave, Boston, MA 02115 USA TI - Single origin of right and left pulmonary artery branches from ascending aorta with nonbranching main pulmonary artery: Relevance to a new understanding of truncus arteriosus AB - We report the third known case of origin of the right and left pulmonary artery branches from the ascending aorta via a short common pulmonary artery. A large unbranching main pulmonary artery opened through a patent ductus arteriosus into the descending thoracic aorta, Preductal coarctation of the aorta and multiple congenital anomalies were also present. This rare cardiovascular malformation facilitates a new anatomic and developmental understanding of truncus arteriosus MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Cardiac & Cardiovascular Systems;Pediatrics U5 - J;Article AV - English IS - 0172-0643 UR - ISI:000173782800023 L2 - origin of pulmonary artery branches;embryology;truncus arteriosus;COMMUNIS SO - Pediatric Cardiology 2002 ;23(2):230-234 7109 UI - 11191 AU - Vizcarra DR AU - Delgado RN AU - Meza MS AU - Escobar F AD - Hypnos Inst Sueno, Lima, PeruUniv Brasilia, Lab Sono, BR-70910900 Brasilia, DF, BrazilUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Nacl Colombia, Hosp San Juan Dios, Lab Neurofisiol Clin, Bogota, Colombia TI - Sleep knowledge in a sample of Latin-American medical students MH - Brazil MH - Colombia MH - Mexico|Distrito Federal MH - Peru PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000174927200734 L2 - EDUCATION SO - Sleep 2002 ;25():A514-A514 7110 UI - 10303 AU - Vlachaki MT AU - Hernandez-Garcia A AU - Ittmann M AU - Chhikara M AU - Aguilar LK AU - Zhu XH AU - The BS AU - Butler EB AU - Woo S AU - Thompson TC AU - Barrera-Saldana H AU - guilar-Cordova E AD - Harvard Univ, Sch Med, Gene Therapy Initiat, Boston, MA 02115, USABaylor Coll Med, Dept Radiol, Houston, TX 77030, USABaylor Coll Med, Dept Pathol, Houston, TX 77030, USABaylor Coll Med, Vet Affairs Med Ctr, Houston, TX 77030, USAUniv Nuevo Leon, Sch Med, Dept Biochem, Nuevo Leon, MexicoAguilar-Cordova, E, Harvard Univ, Sch Med, Gene Therapy Initiat, Boston, MA 02115 USA TI - Impact of preimmunization on adenoviral vector expression and toxicity in a subcutaneous mouse cancer model AB - Immune responses against adenoviral vectors may influence the toxicity and therapeutic effectiveness of adenovirus-mediated gene transfer and may be a limiting factor in adenovirus-mediated gene therapy. The purpose of this study was to determine the effects of preimmunization on intratumoral adenoviral transduction and systemic spread. The hypothesis was that increased doses of adenoviral vectors could overcome local neutralization without added systemic toxicity. The level and duration of gene expression were assessed as a function of time and dose after intratumoral delivery of adenoviral vector (AdV) encoding the luciferase reporter gene (AdV-luc) in a subcutaneous mouse mammary tumor model. Preimmunization resulted in significantly decreased gene expression in tumor and normal tissues (P < 0,01). The decrease was significantly greater in liver than in tumor. Increased AdV doses could be used to overcome the intratumoral inhibition without a concomitant increase in liver transduction. However, preimmunized animals showed greater toxicity than naive animals (P < 0.001). The preimmunized group developed histologic evidence of grade 2-3 hepatic toxicity and increases in the average values of hepatic enzymes. In addition, there was a significant increase in mortality (P < 0.01) in the preimmunized group (12 of 20 animals) compared with the naive group (3 of 20 animals), These findings suggest that although preimmunity can inhibit systemic expression from adenoviral vectors, at high vector doses it may potentiate hepatotoxicity MH - USA MH - Mexico|Nuevo Leon PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 25 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1525-0016 UR - ISI:000177893600009 L2 - adenovirus;gene therapy;preimmunization;toxicity;SITU GENE-THERAPY; I CLINICAL-TRIAL; PROSTATE-CANCER; IMMUNE-RESPONSES; SUICIDE GENE; RADIOTHERAPY; INJECTIONS; MULTIPLE; VIRUS; LIVER SO - Molecular Therapy 2002 ;6(3):342-348 7111 UI - 9736 AU - Vlachy V AU - Hribar B AU - Pizio O AD - Univ Ljubljana, Dept Chem & Chem Technol, Ljubljana 1000, SloveniaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoVlachy, V, Univ Ljubljana, Dept Chem & Chem Technol, Askerceva 5, Ljubljana 1000, Slovenia TI - Replica integral equation theory for partly quenched electrolyte mixtures AB - We present a theoretical study of the quenched-annealed system consisting of an annealed electrolyte and a disordered quenched matrix with ionic obstacles. Both components were modeled as size symmetric +1 : - 1 primitive model electrolytes. The partly quenched system was studied by using the replica Omstein-Zernike, integral equation theory in the hypernetted chain approximation. The effects of concentration of matrix ions, pre-quenching conditions, and the electrolyte and solvent conditions on the excess chemical potential of the annealed electrolyte were examined. The numerical results indicated that the mean activity of the adsorbed electrolyte differs substantially from the corresponding quantity for the bulk electrolyte. The excess chemical potential depends strongly on concentration of charged obstacles and matrix preparation, as also on the temperature and dielectric constant of the annealed electrolyte solution. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovenia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000179502800023 L2 - electrolytes;randomly disordered solids;chemical potential;replica Ornstein-Zemike integral equation;ORNSTEIN-ZERNIKE EQUATIONS; ION-ION CORRELATIONS; ELECTRONEUTRAL CHARGED MATRICES; RANDOM-MEDIA; FLUID DISTRIBUTIONS; DISORDERED MATRICES; ARBITRARY MATRICES; THERMODYNAMICS; EQUILIBRIUM; PREDICTIONS SO - Physica A-Statistical Mechanics and Its Applications 2002 ;314(1-4):156-161 7112 UI - 8570 AU - Vlasova M AU - Kakazei N AU - Gonzalez-Rodriguez JG AU - Juarez-Romero D AU - Constantino ME AU - Salazar-Hernandez B AU - Kovalev A AU - Tomila T AU - Gordienko S AD - UAEM, Dept Sci & Chem Engn, Cuernavaca, Morelos, MexicoUAEM, CIICAp, Cuernavaca, Morelos, MexicoNatl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, UkraineVlasova, M, UAEM, Dept Sci & Chem Engn, Cuernavaca, Morelos, Mexico TI - SiC particles coated by chromium silicides AB - The interaction of chromium vapors with powderlike silicon carbide (SiC) was investigated by Xray phase analysis, X-ray microanalysis, the EPR method, electron microscopy, and the BET method. It has been established that in the temperature range of 147 K to 2023 K under a pressure of 1.3 Pa, the main interaction product is chromium silicide (Cr5Si3), which forms a surface layer on SiC particles in zones with a mean temperature (T-mean) of 1773 K to 1473 K. Moreover, Cr5Si3 vapors passing through the disperse SiC system condense in cold-temperature zones on SiC particles and aggregates MH - Mexico|Morelos MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1064-7562 UR - ISI:000182568200001 L2 - chromium silicides;chromium vapors;coated particles;silicon carbide;SILICON-CARBIDE PARTICLES; CARBOTHERMAL REDUCTION; SYNTHESIS COMPONENTS; INITIAL CONDITION; POWDER; SYSTEM SO - Journal of Materials Synthesis and Processing 2002 ;10(2):67-74 7113 UI - 11150 AU - Vlasova MV AU - Tomila TV AU - Matsera VE AU - Kilimnik AA AU - Golubnichiy AB AD - Ukrainian Acad Sci, Inst Mat Sci Problems, UA-252601 Kiev, UkraineKiev State Tech Univ Construct & Architecture, Kiev, UkraineVlasova, MV, Univ Autonoma Estado Morelos CIICAp, Au Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Grinding slag from ferro-nickel process: some properties of the disperse system AB - The process of grinding of coarse particles of glass-like slag from the ferro-nickel industry in a high-speed ball mill has been studied. The disintegration of slag particles first occurs at the places of ferrous oxide accumulations. Then, the glass-like component of slag particles (calcium silicate) is destroyed accompanied with the formation of the surface defect layer that is easily transformed into calcium hydrosilicate. Further grinding results in the consolidation of slag particles around the ferrous oxide accumulations and in the formation of dense aggregates. The surface defect layer of the glass-like calcium hydrosilicate particles changes into calcium hydrosilicate more efficiently when dispersed in water. This promotes the development of binding properties. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0032-5910 UR - ISI:000175462800012 L2 - slag;calcium silicate;calcium hydrosilicate;grinding SO - Powder Technology 2002 ;124(1-2):101-105 7114 UI - 11913 AU - Voitsekhovich VV AU - Bara S AU - Orlov VG AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Fac Fis, Dept Fis Aplicada, Area Opt, Santiago De Compostela 15706, Galicia, SpainVoitsekhovich, VV, Natl Autonomous Univ Mexico, Inst Astron, AP 70-264 Cd Univ, Mexico City 04510, DF, Mexico TI - Co-phasing of segmented telescopes: A new approach to piston measurements - I. Optical concept AB - One of the main problems arising in the co-phasing of segmented telescopes is the problem of measurements of the relative pistons among the segments. These measurements become especially complicated when the pistons are in order of wavelength fractions. In this paper we present a new approach relative piston measurements which allows for a high-accuracy reconstruction of small pistons. Our approach is based on the shearing interferometry and compared to existed methods it has the following advantages: a high accuracy of piston reconstruction in presence of high levels of noise is combined with the ability to retrieve the pistons taking into account the segment's aberrations MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000173561700030 L2 - instrumentation : miscellaneous;techniques : miscellaneous;MIRRORS SO - Astronomy & Astrophysics 2002 ;382(2):746-751 7115 UI - 11162 AU - Volke-Sepulveda K AU - Garces-Chavez V AU - Chavez-Cerda S AU - Arlt J AU - Dholakia K AD - Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoDholakia, K, Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland TI - Orbital angular momentum of a high-order Bessel light beam AB - The orbital angular momentum density of Bessel beams is calculated explicitly within a rigorous vectorial treatment. This allows us to investigate some aspects that have not been analysed previously, such as the angular momentum content of azimuthally and radially polarized beams. Furthermore, we demonstrate experimentally the mechanical transfer of orbital angular momentum to trapped particles in optical tweezers using a high-order Bessel beam. We set transparent particles of known dimensions into rotation, where the sense of rotation can be reversed by changing the sign of the singularity. Quantitative results are obtained for rotation rates MH - Mexico|Puebla MH - United Kingdom PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 42 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000175436100027 L2 - orbital angular momentum density;Bessel light beams;optical tweezers;GAUSSIAN LASER MODES; POYNTING VECTOR; OPTICAL SPANNER; PARTICLES; SPIN SO - Journal of Optics B-Quantum and Semiclassical Optics 2002 ;4(2):S82-S89 7116 UI - 11761 AU - Volovichev IN AU - Espejo G AU - Gurevich YG AU - Titov OY AU - Meriuts A AD - Ukrainian Acad Sci, Inst Radiophys & Elect, UA-310085 Kharkov, UkraineUAM A, Dept CBI, Mexico City 02200, DF, MexicoIPN, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoIPN, CICATA, Santiago De Queretaro 76040, MexicoKharkov Polytechn Univ, UA-310002 Kharkov, UkraineVolovichev, IN, Ukrainian Acad Sci, Inst Radiophys & Elect, UA-310085 Kharkov, Ukraine TI - Recombination in semiconductors: Appearance of nonequilibrium carriers due to injection or redistribution in the sample AB - It is shown that the traditional approach for consideration of recombination under the condition of a steady-state current in the absence of external carrier generation is internally contradictory. Sometimes the approach leads to obviously incorrect results. Such situations are demonstrated and a new method for consideration of recombination is proposed MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Ukraine PB - MINATO-KU TOKYO: INST PURE APPLIED PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-4922 UR - ISI:000173882300038 L2 - recombination;injection;lifetime;nonequilibrium carriers;quasineutrality;Fermi quasilevel SO - Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers 2002 ;41(1):182-184 7117 UI - 11613 AU - Vovides AP AU - Etherington JR AU - Dresser PQ AU - Groenhof A AU - Iglesias C AU - Ramirez JF AD - Inst Ecol AC, Dept Sistemat Vegetal, Xalapa 91000, Veracruz, MexicoParc Y Bont, Haverfordwest SA62 6XX, Pembroke, WalesUniv Coll Swansea, Dept Geog, Swansea SA2 8PP, W Glam, WalesInst Ecol AC, Jardin Bot Fco J Clavijero, Xalapa 91000, Veracruz, MexicoInst Nacl Ecol, Mexico City 01040, DF, MexicoVovides, AP, Inst Ecol AC, Dept Sistemat Vegetal, Apdo Postal 63, Xalapa 91000, Veracruz, Mexico TI - CAM-cycling in the cycad Dioon edule Lindl. in its natural tropical deciduous forest habitat in central Veracruz, Mexico AB - The cycad Dioon edule Lindl. inhabits a seasonally-dry tropical forest along with associated CAM plants such as bromeliads and cacti. To test the hypothesis that D. edule might also be a CAM plant, diel total-acid fluctuation was measured through the dry to wet seasons of 4 consecutive years on adult D. edule plants in their natural forest habitat in Veracruz, Mexico. Correlations between acid fluctuation index and climatic data, and also soil water potential were determined over this period. Laboratory trials were followed up to estimate diel patterns of CO2 exchange and estimation of delta(13)C value. A comparison of stomatal density cm(-2) with other C-3, CAM and CAM-facultative plants was made. The diel total titratable-acid fluctuation values, although variable, were found to be consistent and significant for the dry season. Carbon dioxide exchange was found to be typical of C-3 plants when hydrated but when the plant was stressed by withholding water, although the leaf remained healthy, there was no significant dark-period CO2 output. Stomatal density was comparable to other CAM and CAM-facultative plants. It was concluded that D. edule is a C-3 plant that shows CAM-cycling metabolism when water stressed. (C) 2002 The Linnean Society of London MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - United Kingdom PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000174400200003 L2 - ecophysiology;Meso-America;photosynthesis;CRASSULACEAN ACID METABOLISM; CARBON METABOLISM; ISOETES-HOWELLII; PHOTOSYNTHESIS SO - Botanical Journal of the Linnean Society 2002 ;138(2):155-162 7118 UI - 11793 AU - Waalkens H AU - Jung C AU - Taylor HS AD - Univ Bremen, Inst Theoret Phys, D-28334 Bremen, GermanyUniv Bremen, Inst Dynam Syst, D-28334 Bremen, GermanyUNAM, Ctr Ciencias Fis, Cuernavaca 62551, Morelos, MexicoUniv So Calif, Dept Chem, Los Angeles, CA 90089, USAWaalkens, H, Univ Bremen, Inst Theoret Phys, Postfach 330 440, D-28334 Bremen, Germany TI - Semiclassical assignment of the vibrational spectrum of N2O AB - The vibrational spectrum of N2O as given by an effective spectroscopic Hamiltonian based on the existence of a superpolyad number is analyzed and assigned in terms of classical motions. The effective Hamiltonian includes a large number of resonances of which only one is dominant for low and intermediate superpolyad numbers. In this energy range, the corresponding classical system is quasi-integrable and can be described in terms of a system with only one nontrivial degree of freedom. This integrable system can be analyzed by considering the so-called "quantizing trajectories" on a "polyad sphere". This method is no longer applicable when the superpolyad number is further increased and classical chaos comes into play. We then turn to a powerful universal method based on the graphical representation of semiclassical wave functions on a naturally appearing toroidal configuration space. These wave functions are obtained using the already known transformation matrix used in fitting the effective Hamiltonian. Experience with the interpretation of the resulting figures allows one to draw conclusions on the classical internal motions and therefore on the assignment of the quantum states without any further calculation. As such, the method is of particular interest to nontheorists and to nonspecialists in the fields of nonlinear dynamics and quantum calculation. For higher superpolyad numbers, the chaos remains mainly concentrated about the direct neighborhood of a separatrix of the former integrable system so that a great part of the vibrational spectrum can still be assigned in terms of the EBK quantum numbers of quantized tori MH - Germany MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000173783300008 L2 - FERMI RESONANCE-SPECTRA; TRANSITION; DYNAMICS; STATES SO - Journal of Physical Chemistry A 2002 ;106(6):911-924 7119 UI - 10725 AU - Wackernagel M AU - Schulz NB AU - Deumling D AU - Linares AC AU - Jenkins M AU - Kapos V AU - Monfreda C AU - Loh J AU - Myers N AU - Norgaard R AU - Randers J AD - Redefining Progress, Oakland, CA 94612, USAAustrian Univ, Inst Interdisciplinary Studies, Dept Social Ecol, A-1070 Vienna, AustriaCtr Estudios Para Sustentabilidad, Dept 6, Xalapa 91060, Veracruz, MexicoWorld Conservat Monitoring Ctr, Cambridge CB3 0DL, EnglandWorld Wide Fund Nat Int, CH-1196 Gland, SwitzerlandUniv Oxford Green Coll, Oxford OX2 6HG, EnglandUniv Calif Berkeley, Energy Resources Grp, Berkeley, CA 94720, USANorwegian Sch Management, N-1302 Sandvika, NorwayWackernagel, M, Redefining Progress, 1904 Franklin St,6th Floor, Oakland, CA 94612 USA TI - Tracking the ecological overshoot of the human economy AB - Sustainability requires living within the regenerative capacity of the biosphere. In an attempt to measure the extent to which humanity satisfies this requirement, we use existing data to translate human demand on the environment into the area required for the production of food and other goods, together with the absorption of wastes. Our accounts indicate that human demand may well have exceeded the biosphere's regenerative capacity since the 1980s. According to this preliminary and exploratory assessment, humanity's load corresponded to 70% of the capacity of the global biosphere in 1961, and grew to 120% in 1999 MH - Austria MH - USA MH - United Kingdom MH - Mexico|Veracruz MH - Norway MH - Switzerland PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 97 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000176775400036 L2 - HUMAN APPROPRIATION; ECOSYSTEMS; FOOTPRINT; CYCLE SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(14):9266-9271 7120 UI - 11146 AU - Wagner FA AU - Anthony JC AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Baltimore, MD 21205, USAInst Nacl Psiquiatria, Div Estudios Epidemiol & Sociales, Dept Invest Serv Salud, Mexico City, DF, MexicoAnthony, JC, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, 624 N Broadway, Baltimore, MD 21205 USA TI - Into the world of illegal drug use: Exposure opportunity and other mechanisms linking the use of alcohol, tobacco, marijuana, and cocaine AB - Drawing upon an "exposure opportunity" concept described by Wade Hampton Frost, the authors studied two mechanisms to help account for prior observations about the "stepping-stone" or "gateway" sequences that link the use of alcohol, tobacco, marijuana, and cocaine. Data were obtained from four nationally representative and independent cross-sectional samples of US household residents (n = 44,624 persons aged 12-25 years). Data were gathered using standardized self-report methods and were analyzed via survival methods. Results indicated that users of tobacco and alcohol were more likely than nonusers to have an opportunity to try marijuana and were more likely to actually use marijuana once a marijuana opportunity had occurred. Opportunity to use cocaine was associated with prior marijuana smoking. Among young people with a cocaine opportunity those who had used marijuana were more likely to use cocaine than were those with no history of marijuana use. The observed associations did not seem to arise solely as a result of young drug users' seeking out opportunities to use drugs. Applying Frost's epidemiologic concept of exposure opportunity, the authors offer new epidemiologic evidence on the sequences that link earlier use of alcohol and tobacco to later illegal drug involvement MH - USA MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 60 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000175628800006 L2 - adolescent behavior;alcohol drinking;cocaine;marijuana smoking;psychology;smoking;social environment;street drugs;MALE-FEMALE DIFFERENCES; TIME SURVIVAL ANALYSIS; UNITED-STATES; INVOLVEMENT; TRANSITIONS; REGRESSION; ONSET; RISK SO - American Journal of Epidemiology 2002 ;155(10):918-925 7121 UI - 11559 AU - Wagner FA AU - Anthony JC AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, ELCID, Dept Mental Hyg, Baltimore, MD 21205, USAInst Nacl Psiquiatria, Direcc Invest Epidemiol & Psicosociales, Dept Invest Serv Salud, Mexico City, DF, MexicoAnthony, JC, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, ELCID, Dept Mental Hyg, 624 N Broadway,ELCID Rm 893, Baltimore, MD 21205 USA TI - From first drug use to drug dependence: Developmental periods of risk for dependence upon marijuana, cocaine, and alcohol AB - The focal point of this paper is the transition from drug use to drug dependence. We present new evidence on risk for starting to use marijuana, cocaine, and alcohol, as well as risks for progression from first drug use to the onset of drug dependence, separately for each of these drugs. Data from thie National Comorbidity Survey (NCS) were analyzed. The NCS had a representative sample of the United States population ages 15-54 years (n = 8,098). Survival analysis techniques were used to provide age- and time-specific risk estimates of initiating use of marijuana, cocaine, and alcohol, as well as of becoming dependent on each drug. With respect to risk of initiating use, estimated peak values for alcohol and marijuana were found at age 18, about two years earlier than the later peak in risk of initiating cocaine use. With respect to risk of meeting criteria for the clinical dependence syndrome, estimated peak values for alcohol and marijuana were found at age 17-18. Peak values for cocaine dependence were found at age 23-25. Once use began, cocaine dependence emerged early and more explosively, with an estimated 5-6% of cocaine users becoming cocaine dependent in the first year of use. Most of the observed cases of cocaine dependence met criteria for dependence within three years after initial cocaine use. Whereas some 15-16% of cocaine users had developed cocaine dependence within 10 years of first cocaine use, the corresponding values were about 8% for marijuana users, and 12-13% for alcohol users. The most novel findings of this study document a noteworthy risk for quickly developing cocaine dependence after initial cocaine use, with about one in 16 to 20 cocaine users becoming, dependent within the first year of cocaine use. For marijuana and alcohol, there is a more insidious onset of the drug, dependence syndrome. (C) 2002 American College of Neuropsychopharmacology. Published by Elsevier Science Inc MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 66 U4 - Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Article AV - English IS - 0893-133X UR - ISI:000174554000007 L2 - epidemiology;survival analysis;risk;cannabis;cocaine;alcohol;INTERNATIONAL DIAGNOSTIC INTERVIEW; NATIONAL-COMORBIDITY-SURVEY; TEST-RETEST RELIABILITY; SELF-REPORT STABILITY; DSM-IV DRUG; SUBSTANCE USE; PSYCHIATRIC-DISORDERS; EPIDEMIOLOGIC SURVEY; ENVIRONMENTAL-INFLUENCES; GENERAL-POPULATION SO - Neuropsychopharmacology 2002 ;26(4):479-488 7122 UI - 10920 AU - Wakida FT AU - Lerner DN AD - Univ Sheffield, Dept Civil & Struct Engn, Groundwater Protect & Restorat Grp, Sheffield S1 3JD, S Yorkshire, EnglandUABC, Fac Ciencias Quim, Tijuana, MexicoWakida, FT, Univ Sheffield, Dept Civil & Struct Engn, Groundwater Protect & Restorat Grp, Sheffield S1 3JD, S Yorkshire, England TI - Nitrate leaching from construction sites to groundwater in the Nottingham, UK, urban area AB - Nitrate pollution has been identified as a major water quality issue in the UK. The aim of this project is to research the rate of nitrate leaching to groundwater that arises from construction works: The study area is situated in Nottingham UK, which is situated on the Triassic Sandstone aquifer. Soil samples up to a depth of 2.50 m were taken from three sites under construction and other land use. The results have shown a high variability in the concentrations of soil-nitrate,. The reasons for this variability include soil type, past land use, soil treatment and type of vegetation prior to construction works. The average nitrogen load was 65 kg N ha(-1) which is higher than the nitrate leaching observed when temporary grassland is ploughed during autumn. The highest nitrate concentrations were observed in an allotment site (133 kg N ha(-1)) dud to the high amount of manure applied at this location. The construction practice of top soil stripping can produce a reduction of nitrate leaching because it removes the part of the soil that contains most of the potentially mineralizable nitrogen MH - United Kingdom MH - Mexico|Baja California PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000176222600030 L2 - construction sites;nitrate leaching;non-agricultural;Nottingham;Triassic Sandstone;urban groundwater;MANAGEMENT; GRASSLAND; LOSSES SO - Water Science and Technology 2002 ;45(9):243-248 7123 UI - 10846 AU - Walton WC AU - MacKinnon C AU - Rodriguez LF AU - Proctor C AU - Ruiz GA AD - Smithsonian Environm Res Ctr, Edgewater, MD 21037, USACSIRO, Ctr Res Introduced Marine Pests, Hobart, Tas 7001, AustraliaAC, Inst Biol Ecol & Conservat, Zapopan 45070, Jalisco, MexicoUniv Calif Davis, Dept Environm Sci & Policy, Grad Grp Ecol, Davis, CA 95616, USAWalton, WC, Wellfleet Shellfish Dept, 300 Main St, Wellflect, MA 02667 USA TI - Effect of an invasive crab upon a marine fishery: green crab, Carcinus maenas, predation upon a venerid clam, Katelysia scalarina, in Tasmania (Australia) AB - Nonindigenous species are increasingly recognized as altering marine and estuarine communities, causing significant changes in abundance and distribution of native species. Such effects are of particular concern to coastal fisheries. We experimentally determined the effect of the nonindigenous European green crab, Carcinus maenas, upon the stepped venerid clam, Katelysia scalarina, the basis for a fledgling clam fishery in Tasmania, Australia. First, we observed a trend of decreased juvenile (< 13-mm shell length or SL) abundance of K. scalarina at sites with C maenas relative to those without this invasive predator. Additionally, relative predation intensity on these juveniles was significantly higher in invaded areas. To better understand the dynamics of predation by this invader, we conducted a number of manipulative experiments. In cage experiments testing per capita predation rates, we found that: (1) of the various sizes of C maenas, large C maenas were the most significant predators; (2) the smallest size class of K. scalarina tested (6-12-mm SL) was preferred by C. maenas; (3) C. maenas had much higher predation rates than any native predator tested, and (4) while the native shore crab, Paragrapsus gaimardii, was found to have a constant predation rate over an eightfold range of densities of juvenile K. scalarina (16 - 128 individuals.m(2)), C. maenas significantly increased its per capita predation with increasing prey density. Notably, in open Field plots at a site where C maenas was abundant, predation was constant over the range of tested prey densities. We predict, therefore, that the invasion of C maenas will have significant negative consequences for the Tasmanian K. scalarina fishery. (C) 2002 Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 27 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000176418500005 L2 - nonindigenous;predation;shellfish;Carcinus maenas;Katelysia scalarina SO - Journal of Experimental Marine Biology and Ecology 2002 ;272(2):171-189 7124 UI - 10136 AU - Wang ET AU - Rogel MA AU - Sui XH AU - Chen WX AU - Martinez-Romero E AU - van Berkum P AD - USDA ARS, Soybean Genom & Improvement Lab, BARC W, Beltsville, MD 20705, USAIPN, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 07738, DF, MexicoUNAM, Ctr Invest Sobre Fijac Nitrogeno, Programa Ecol Microbiana Mol, Cuernavaca, Morelos, MexicoChina Agr Univ, Coll Biol, Dept Microbiol, Beijing 100094, Peoples R Chinavan Berkum, P, USDA ARS, Soybean Genom & Improvement Lab, BARC W, HH-4,Bldg010,10300 Baltimore Blvd, Beltsville, MD 20705 USA TI - Mesorhizobium amorphae, a rhizobial species that nodulates Amorpha fruticosa, is native to American soils AB - Amorpha fruticosa was inoculated with rhizosphere soil from Iowa, USA, and 140 rhizobia isolated from root nodules were compared with Mesorhizobium amorphae originating from Chinese soils. PCR-RFLP patterns of the 16S rRNA gene from the isolates and from M. amorphae were the same. All isolates had a symbiotic plasmid of the same size with a single nifH gene. DNA:DNA hybridization values, DNA G+C content, and induced Nod factor patterns also were similar. We concluded that the four genotypes distinguished among 53 representative American isolates were M. amorphae. Since A. fruticosa is native to the Americas and is highly specific in its nodulation requirement, M. amorphae probably was transmitted to China MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Peoples R China PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000178503600009 L2 - Amorpha fruticosa;Mesorhizobium amorphae;rhizobia;symbiosis;nitrogen fixation;plant-microbe interaction;BEAN PHASEOLUS-VULGARIS; NITROGEN-FIXATION; NIFH GENES; SP. NOV.; PLASMID; DIVERSITY; SEQUENCES; GALLICUM; SYMBIONT; NODULES SO - Archives of Microbiology 2002 ;178(4):301-305 7125 UI - 10228 AU - Wang ET AU - Tan ZY AU - Willems A AU - Fernandez-Lopez M AU - Reinhold-Hurek B AU - Martinez-Romero E AD - IPN, Escuela Nacl Ciencias Biol, Lab Microbiol Agricola, Mexico City 11340, DF, MexicoUniv Bremen, Fac Biol & Chem, Lab Gen Microbiol, D-28334 Bremen, GermanyState Univ Ghent, Microbiol Lab, Vakgroep Biochim Fysiol & Microbiol, B-9000 Ghent, BelgiumCSIC, Estac Expt Zaidin, Grp Ecol Genet, E-18008 Granada, SpainUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nnitrogeno, Cuernavaca 62191, Morelos, MexicoWang, ET, IPN, Escuela Nacl Ciencias Biol, Lab Microbiol Agricola, Prol Carpio & Plan Ayala, Mexico City 11340, DF, Mexico TI - Sinorhizobium morelense sp nov., a Leucaena leucocephala-associated bacterium that is highly resistant to multiple antibiotics AB - Sinorhizobium morelense sp. nov. is described to designate a group of bacteria isolated from root nodules of Leucaena leucocephala. S. morelense shows 98% 16S rRNA gene sequence similarity to some Sinorhizobium species and to Ensifer adhaerens. This novel species is distinguished from other Sinorhizobium species and from E. adhaerens by DNA-DNA hybridization, 16S rRNA gene restriction fragments and sequence and some distinctive phenotypic features. Strains of this species are highly resistant to some antibiotics, such as carbenicillin (1 mg ml-(1)), kanamycin (500 mug ml(-1)) and erythromycin (300 mug ml(-1)). They do not form nodules, but a nodulating strain, Lc57, is closely related to the novel species. Strain Lc04(T) (=LMG 21331(T)=CFN E1007(T)) is designated as the type strain of this novel species MH - Belgium MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 20 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000178117500032 L2 - Sinorhizobium morelense;phylogeny;DNA-DNA relatedness;antibiotic resistance;GEN-NOV; DEOXYRIBONUCLEIC-ACID; RHIZOBIUM-TROPICI; GENETIC-STRUCTURE; STRAINS; NODULATE; HYBRIDIZATION; DIVERSITY; MELILOTI; MEDICAGO SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():1687-1693 7126 UI - 9559 AU - Wang LY AU - Gu XY AU - Ma ZQ AU - Dong SH AD - Hunam Normal Univ, Dept Coll Comp Educ, Changsha 410081, Peoples R ChinaInst High Energy Phys, Beijing 100039, Peoples R ChinaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoWang, LY, Hunam Normal Univ, Dept Coll Comp Educ, Changsha 410081, Peoples R China TI - Exact solutions to D-dimensional Schrodinger equation with a pseudoharmonic oscillator AB - The exact solutions to the Schrodinger equation with a pseudoharmonic oscillator in an arbitrary dimension D is presented MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0894-9875 UR - ISI:000179898400006 L2 - Schrodinger equation;pseudoharmonic oscillator;D-dimensional space SO - Foundations of Physics Letters 2002 ;15(6):569-576 7127 UI - 11933 AU - Wang XF AU - Kushwaha MS AU - Vasilopoulos P AD - Concordia Univ, Dept Phys, Montreal, PQ H3G 1M8, CanadaUniv Puebla, Inst Phys, Puebla 72570, MexicoWang, XF, Concordia Univ, Dept Phys, 1455 Maisonneuve Blvd W, Montreal, PQ H3G 1M8, Canada TI - Tunability of acoustic spectral gaps and transmission in periodically stubbed waveguides AB - A theoretical investigation is made of acoustic wave propagation in a periodically stubbed waveguide. In general the waveguide segments and stubs are made of different materials, The acoustic wave in such a system has two independent polarizations: out-of-plane and in-plane modes. The band structure and transmission spectrum is studied for diverse geometries using a simple and efficient version of the transfer-matrix method. For the same material between the waveguide and symmetric stubs the width of some gaps can change, upon varying the stub length or width, by more than one order of magnitude. A further modulation can be achieved for different material between the stubs and the main waveguide or if the stubs are asymmetric. The gaps in the band structure of an infinitely long system correspond to those in the transmission spectrum of the same system but with finite number it of units. For n finite (i) there exist pseudogaps that gradually turn into complete gaps with increasing n and (ii) the introduction of defects gives rise to states in the gaps and leads to transmission resonances MH - Canada MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000173448900038 L2 - BAND-GAPS; ELASTIC COMPOSITES; WAVE-GUIDES; STOP-BANDS; ANTIRESONANCES; PROPAGATION; ATTENUATION; TUBES; SOUND SO - Physical Review B 2002 ;65(3): 7128 UI - 10911 AU - Wang XQ AU - Alfaro ML AU - Evans GF AU - Zuckerman SH AD - Eli Lilly & Co, Lilly Res Labs, Div Cardiovasc Res, Indianapolis, IN 46285, USAUniv Autonoma Metropolitana, Xochimilco, MexicoZuckerman, SH, Eli Lilly & Co, Lilly Res Labs, Div Cardiovasc Res, Indianapolis, IN 46285 USA TI - Histone deacetylase inhibition results in decreased macrophage CD9 expression AB - Histone deacetylase (HDAC) inhibitors have been demonstrated to regulate myeloid cell differentiation. In the present study the effects of the HDAC inhibitor trichostatin A (TSA) on the tetraspanin cell surface antigen CD9 were determined in primary murine macrophages. TSA inhibited CD9 protein and message expression and was optimal by 48 h. TSA did not induce similar effects on other surface markers and resulted in a modest increase or no effect on CD54 and CD11b, respectively. These effects were concentration dependent and concomitant with increased histone H4 acetylation. While interferon-gamma (IFN-gamma) and TSA had similar effects on CD9 expression, transcriptional profiling demonstrated significant differences in the genes activated by these stimuli. Notably CD14 message was down-regulated by IFN-gamma while increased by TSA. These results demonstrate that HDAC inhibition may modulate macrophage function in part through changes in the expression of membrane proteins associated with matrix interactions. (C) 2002 Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000176364700025 L2 - macrophages;histone deacetylases;inflammation;transcriptional profiling;tetraspanins;trichostatin A;TRICHOSTATIN-A; UP-REGULATION; IN-VITRO; CELLS; GENE; APOPTOSIS; DIFFERENTIATION; ACTIVATION; CHROMATIN; MOLECULES SO - Biochemical and Biophysical Research Communications 2002 ;294(3):660-666 7129 UI - 11182 AU - Wang XQ AU - Panousis CG AU - Alfaro ML AU - Evans GF AU - Zuckerman SH AD - Lilly Res Labs, Div Cardiovasc Res, Indianapolis, IN 46285, USAUniv Autonoma Metropolitana Xochimilco, Xochimilco, MexicoRoche Labs, Basel, SwitzerlandZuckerman, SH, Lilly Res Labs, Div Cardiovasc Res, Indianapolis, IN 46285 USA TI - Interferon-gamma-mediated downregulation of cholesterol efflux and ABC1 expression is by the Stat1 pathway AB - The pathological role of interferon-gamma (IFN-gamma) in atherosclerosis is mediated through effects on macrophages, foam cells, and other vascular cells. Recently, we reported that ATP-binding cassette transporter 1(ABC1) message and protein levels were decreased 3- to 4-fold in foam cells by IFN-gamma. In the present study, the pathway by which IFN-gamma inhibited ABC1 expression was investigated with signal transducers and activators of transcription (Stat1) knockout mice. IFN-gamma-stimulated, wild-type, macrophage-derived foam cells, as previously reported, exhibited a decrease in cholesterol efflux and ABC1 expression as well as an increase in acyl coenzyme A: cholesterol-O-acyltransferase activity. However, IFN-gamma treatment of foam cells from Stat1 knockout mice failed to demonstrate reductions in efflux or ABC1 expression at the message or protein levels, nor were there any increases in acyl coenzyme A:cholesterol-O-acyltransferase activity. However, ABC1 mRNA expression in macrophages from Stat1 knockout mice could still be demonstrated to be increased by lipid loading with acetylated low density lipoprotein. Finally, Stat1-independent gene activation by IFN-gamma was intact in the Stat1 KO macrophages, inasmuch as IFN-gamma was shown to stimulate increases in interleukin-6 production in the Stat1 KO macrophages that were comparable to those observed in the wild-type macrophages. Therefore, Stat1 signaling is necessary and sufficient for the inhibitory effects of IFN-gamma on cholesterol efflux and ABC1 expression MH - USA MH - Mexico|Distrito Federal MH - Switzerland PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 1079-5642 UR - ISI:000175511700007 L2 - interferon-gamma;atherosclerosis;knockout mice;inflammation;BINDING CASSETTE TRANSPORTER-1; SCAVENGER RECEPTOR EXPRESSION; TANGIER-DISEASE; FOAM CELLS; ATHEROSCLEROTIC PLAQUE; IFN-GAMMA; TGF-BETA; GENE; MACROPHAGES; MECHANISMS SO - Arteriosclerosis Thrombosis and Vascular Biology 2002 ;22(5):E5-E9 7130 UI - 10858 AU - Wang YX AU - Vazquez-Duhalt R AU - Pickard MA AD - Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, CanadaUNAM, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoPickard, MA, Univ Alberta, Dept Biol Sci, CW 405 Biol Sci Bldg, Edmonton, AB T6G 2E9, Canada TI - Purification, characterization, and chemical modification of manganese peroxidase from Bjerkandera adusta UAMH 8258 AB - Ten strains of Bjerkandera adusta from the University of Alberta Microfungus Collection and Herbarium (UAMH) were compared for manganese peroxidase production. The enzyme from B. adusta UAMH 8258 was chosen for further study. After purification the enzyme showed a molecular weight of 43 kDa on 15% SDS-PAGE, 36.6 kDa on matrix-assisted laser desorption ionization-time of flight mass spectrometry, and an isoelectric point of 3.55. The N-terminal amino acid sequence was determined to be VAXPDGVNTATNAAXXALFA, and the amino acid composition showed no tyrosine residues in the enzyme. Manganese peroxidase exhibited both Mn(II)-dependent (optimum pH 5) and Mn(II)-independent activity (optimum pH 3). The purified enzyme was chemically modified with cyanuric chloride-activated methoxypolyethylene glycol to enhance its surface hydrophobicity. The modified and native enzymes showed similar catalytic properties in the oxidation of Mn(II) and other substrates such as 2,6-dimethoxylphenol, veratryl alcohol, guaiacol, and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonate). However, the modified enzyme showed greater resistance to denaturation by hydrogen peroxide and stability to organic solvents such as acetonitrile, N,N-dimethylformamide, tetrahydrofuran, methanol, and ethanol. The PEG-modified enzyme also showed greater stability to higher temperatures and lower pH than the native enzyme. Thus, chemical modification of manganese peroxidase from B. adusta increases its potential usefulness for applied studies MH - Canada MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000176581500001 L2 - BASIDIOMYCETE PHANEROCHAETE-CHRYSOSPORIUM; FUNGUS PLEUROTUS-ERYNGII; WHITE-ROT FUNGI; LIGNIN PEROXIDASE; DEPENDENT PEROXIDASE; CERIPORIOPSIS-SUBVERMISPORA; MOLECULAR CHARACTERIZATION; NEMATOLOMA-FROWARDII; ORGANIC-SOLVENTS; PHLEBIA-RADIATA SO - Current Microbiology 2002 ;45(2):77-87 7131 UI - 8996 AU - Warburton ML AU - Xia XC AU - Crossa J AU - Franco J AU - Melchinger AE AU - Frisch M AU - Bohn M AU - Hoisington D AD - CIMMYT, Int Appl Biotechnol Ctr, Mexico City 06600, DF, MexicoUniv Republica, Fac Agron, Montevideo 12900, UruguayUniv Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyWarburton, ML, CIMMYT, Int Appl Biotechnol Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Genetic characterization of CIMMYT inbred maize lines and open pollinated populations using large scale fingerprinting methods AB - The International Maize and Wheat Improvement Center (CIM-MYT) currently holds about 17 000 samples of maize (Zea mays L.) and teosinte (Z. mays, several subspecies), a wild relative of maize. Seven CIMMYT populations and 57 inbreds were characterized by simple sequence repeat (SSR) markers. SSRs chosen from almost every bin in the maize genetic map were tested for repeatability, ease of automation in allele calling, and discrimination (information content). Eighty-five SSRs were found to be repeatable and easily automated, and were run on all material in the study. Fifty-three of these SSRs were found to be the most discriminatory and will be used in future routine fingerprinting studies. The seven breeding populations clustered as would be predicted on the basis of pedigree and heterotic grouping. Genetic diversity within each population was significantly higher than diversity between populations, indicating that the populations are heterogeneous at the molecular level. The inbreds also showed a high level of genetic diversity, indicating that CIMMYT breeders have successfully incorporated considerable genetic diversity into CIMMYT maize germplasm. Only lines closely related by pedigree clustered together. Population of origin and heterotic grouping were not associated with the clusters formed on the basis of SSR markers, a result consistent with the high level of diversity within source populations of the inbreds. Although this will make it more difficult to assign CIMMYT inbred lines to currently existing heterotic groups by means of markers, the markers may be useful in refining the CIMMYT heterotic groups into additional and more uniform groups MH - Germany MH - Mexico|Distrito Federal MH - Uruguay PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 23 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430200009 L2 - ZEA-MAYS L; MOLECULAR MARKERS; DIVERSITY; RFLP; GERMPLASM; RESOURCES; ATTRIBUTES; DISTANCES; PEDIGREE; UTILITY SO - Crop Science 2002 ;42(6):1832-1840 7132 UI - 12061 AU - Warmuth R AU - Kerdelhue JL AU - Carrera SS AU - Langenwalter KJ AU - Brown N AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAInst Tecnol & Estudios Super Monterrey, Monterrey 64849, NL, MexicoWarmuth, R, Kansas State Univ, Dept Chem, 111 Willard Hall, Manhattan, KS 66506 USA TI - Rate acceleration through dispersion interactions: Effect of a hemicarcerand on the transition state of inner phase decompositions of diazirines MH - USA MH - Mexico|Nuevo Leon PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1433-7851 UR - ISI:000173124900012 L2 - dispersion interactions;hemicarcerands;host-guest systems;molecular container;transition states;DIELS-ALDER REACTION; ASSEMBLED MOLECULAR CAPSULE; TRIPLET ENERGY-TRANSFER; TEMPERATURE-DEPENDENCE; REORGANIZATION ENERGY; THERMAL-DECOMPOSITION; BIOMIMETIC CATALYSIS; CONTAINER COMPOUNDS; O-BENZYNE; CYCLOADDITIONS SO - Angewandte Chemie-International Edition 2002 ;41(1):96-99 7133 UI - 10026 AU - Watanabe O AU - Sharma A AD - Tokyo Inst Technol, Dept Math & Comp Sci, Tokyo 1528552, JapanUniv New S Wales Mexico, Sch Engn & Comp Sci, Mexico City, DF, MexicoWatanabe, O, Tokyo Inst Technol, Dept Math & Comp Sci, Tokyo 1528552, Japan TI - Algorithmic learning theory - Preface MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - J;Editorial Material AV - English IS - 0304-3975 UR - ISI:000178686500001 SO - Theoretical Computer Science 2002 ;288(2):195-196 7134 UI - 7107 AU - Webb R AU - Nicholas B AU - Gong JG AU - Campbell BK AU - Gutierrez CG AU - Garverick HA AU - Armstrong DG AD - Univ Nottingham, Sch Biosci, Div Agr Sci, Loughborough LE12 5RD, Leics, EnglandRoslin Inst, Div Integrat Biol, Roslin EH25 9PS, Midlothian, ScotlandUniv Nottingham, Sch Human Dev, Dept Obstet & Gynaecol, Nottingham NG7 2UH, EnglandUniv Nacl Autonoma Mexico, Fac Vet Med, Mexico City 0451, DF, MexicoUniv Missouri, Dept Anim Sci, Columbia, MO 65211, USAWebb, R, Univ Nottingham, Sch Biosci, Div Agr Sci, Loughborough LE12 5RD, Leics, England TI - Mechanisms regulating follicular development and selection of the dominant follicle AB - Reproductive function is an integrated process encompassing both extraovarian signals, such as gonadotrophins, and intrafollicular factors, such as locally produced growth factors. Initiation of primordial follicle growth and the early stages of folliculogenesis can occur without gonadotrophins. However, in vivo and in vitro studies indicate that FSH may stimulate the rate of preantral follicle growth and that it can take only 3 months for a primordial follicle to reach the ovulatory stage. Antral follicle development from 2 and 4 mm in diameter in sheep and cattle, respectively, is gonadotrophin dependent. During the oestrous cycle a transient increase in circulating FSH precedes the recruitment of a group of follicles. Recruited follicles are characterized by induction of expression of mRNAs encoding a range of steroidogenic enzymes, gonadotrophin receptors and local regulatory factors. As follicles continue to mature, there is a transfer of dependency from FSH to LH, which may be part of the mechanism involved in selection of follicles for continued growth. The mechanism of selection of the ovulatory follicle seems to be linked to the timing of mRNA expression encoding LHr and 3beta-hydroxysteroid dehydrogenase (3beta-HSD) in granulosa cells. Locally produced growth factors, such as the insulin-like growth factors (IGFs) and members of the transforming growth factor beta (TGFbeta) superfamily (inhibins, activins and bone morphogenetic proteins (BMPs)), work in concert with gonadotrophins throughout the follicular growth continuum. The roles of growth factors in follicular development and survival are dependent on gonadotrophin status and differentiation state, including morphology. In conclusion, it is the integration of extraovarian signals and intrafollicular factors that determine whether a follicle will continue to develop or be diverted into atretic pathways, as is the case for most of the follicles in monovulatory species, such as cattle MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: SOC REPRODUCTION FERTILITY RP - NOT IN FILE U3 - TC 0 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1470-1626 UR - ISI:000186202300008 L2 - GROWTH-FACTOR-I; BOVINE PREANTRAL FOLLICLES; TYPE-1 IGF RECEPTOR; MESSENGER RIBONUCLEIC-ACIDS; ESTROUS-CYCLE; STIMULATING-HORMONE; EXTRACELLULAR-MATRIX; GRANULOSA-CELLS; INHIBIN-A; PREOVULATORY FOLLICLES SO - Reproduction 2002 ;():71-90 7135 UI - 11932 AU - Weber A AU - Ligterink NE AD - Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoECT, I-38050 Trent, ItalyWeber, A, Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Edificio C-3 Cd Univ,A Postal 2-82, Morelia 58040, Michoacan, Mexico TI - Generalized Gell-Mann-Low theorem for relativistic bound states AB - The recently established generalized Gell-Mann-Low theorem is applied in lowest perturbative order to bound-state calculations in a simple scalar field theory with cubic couplings. The approach, via the generalized Gell-Mann-Low theorem retains, while being fully relativistic, many of the desirable features of the quantum mechanical approaches to bound states. In particular, no abnormal or unphysical solutions are found in the model under consideration. Both the nonrelativistic and one-body limits are straightforward and consistent. The results for the spectrum are compared to those of the Bethe-Salpeter equation (in the ladder approximation) and related equations MH - Italy MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000173402500078 L2 - LIGHT-FRONT DYNAMICS; FEYNMAN-SCHWINGER REPRESENTATION; FIELD-THEORY; EQUATION; CONE; SYSTEMS; MODEL SO - Physical Review D 2002 ;65(2): 7136 UI - 11210 AU - Weckx LLM AU - Ruiz JE AU - Duperly J AU - Mendizabal GAM AU - Rausis MBG AU - Piltcher SL AU - Saffer M AU - Matsuyama C AU - Levy S AU - Fort JG AD - Univ Fed Sao Paulo, Disciplina Otorrinolaringol Pediat, Dept Peidat Otolaryngol, BR-04025001 Sao Paulo, BrazilHosp Familia, SADEC, FEMAP, Chihuahua, MexicoGPPG, Hosp Clin Porto Alegre, Porto Alegre, RS, BrazilComplexo Hosp Santa Casa Porto Alegre, Ambulatorio Otorrino, Porto Alegre, RS, BrazilHosp CEMA, Sao Paulo, BrazilWeckx, LLM, Univ Fed Sao Paulo, Disciplina Otorrinolaringol Pediat, Dept Peidat Otolaryngol, Rua Otonis 684 Vila Clementino, BR-04025001 Sao Paulo, Brazil TI - Efficacy of celecoxib in treating symptoms of viral pharyngitis: A double-blind, randomized study of celecoxib versus diclofenac AB - This study compared the efficacy and safety of the cyclooxygenase-2 specific inhibitor celecoxib with the conventional nonsteroidal anti-inflammatory drug diclofenac in the symptomatic treatment of viral pharyngitis. Adult patients from 27 study centers in Latin America were treated with oral doses of celecoxib 200 mg once daily or 200 mg twice daily, or diclofenac 75 mg twice daily for 5 days in a double-blind, randomized study. The primary efficacy assessment was 'Throat Pain on Swallowing' on day 3. In addition, secondary quality-of-life assessments were performed on days 3 and S. All adverse events and treatment-emergent signs and symptoms were recorded. Data from 313 patients were evaluable for efficacy (105 celecoxib 200 mg once daily, 107 celecoxib 200 mg twice daily, 101 diclofenac 75 mg twice daily). The upper 95% confidence limits for the visual analog scale of 'Throat Pain on Swallowing' on day 3 for celecoxib 200 mg once daily relative to diclofenac 75 mg twice daily, and celecoxib 200 mg twice daily relative to diclofenac 75 mg twice daily were 9.26 and 7.83, respectively. All secondary efficacy and quality-of-life measures were clinically similar for the three treatment groups, and no statistically significant differences were detected. The incidences of treatment-emergent adverse events and withdrawals due to adverse events were similar for all groups, but numerically higher among patients taking diclofenac than celecoxib. More patients in the diclofenac group reported gastrointestinal complaints (7.3%) compared with those in the celecoxib groups (4.3% in the celecoxib 200 mg once-daily group and 3.4% in the celecoxib 200 mg twice-daily group). In conclusion, 5 days of treatment with celecoxib 200 mg once daily is as effective as diclofenac 75 mg twice daily in the symptomatic treatment of viral pharyngitis. Celecoxib 200 mg once daily is also as effective as celecoxib 200 mg twice daily in this condition MH - Brazil MH - Mexico|Chihuahua PB - WORTHING: CAMBRIDGE MED PUBL RP - NOT IN FILE U3 - TC 3 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0300-0605 UR - ISI:000175403900012 L2 - celecoxib;cyclooxygenase (COX)-2 specific inhibitors;viral pharyngitis;symptomatic treatment;throat pain on swallowing;NONSTEROIDAL ANTIINFLAMMATORY DRUGS; CONTROLLED TRIAL; RHEUMATOID-ARTHRITIS; SELECTIVE-INHIBITION; OSTEOARTHRITIS; MANAGEMENT; COMPLICATIONS; PLACEBO; COX-2; PAIN SO - Journal of International Medical Research 2002 ;30(2):185-194 7137 UI - 9556 AU - Wei GH AU - Wang ET AU - Tan ZY AU - Zhu ME AU - Chen WX AD - Beijing Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R ChinaNW Sci & Technol Univ Agri & Forestry, Yangling 712100, Shaanxi, Peoples R ChinaInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoChen, WX, Beijing Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R China TI - Rhizobium indigoferae sp nov and Sinorhizobium kummerowiae sp nov., respectively isolated from Indigofera spp. and Kummerowia stipulacea AB - Kummerowia, two genera of annual or perennial wild legumes growing in the Loess Plateau in north-western China, were characterized by a polyphasic approach. Two main groups, cluster 1 and cluster 2, were defined based upon the results of numerical taxonomy, SDS-PAGE of whole-cell proteins and DNA relatedness. All the isolates within cluster 1 were isolated from Indigofera and they were identified as Rhizobium strains by 16S rRNA gene analysis. DNA relatedness of 29(.)5-48(.)9% was obtained among the cluster 1 isolates and the reference strains for defined Rhizobium species. Cluster 2 consisted of isolates from Kummerowia stipulacea and was identified as belonging to Sinorhizobium by 16S rRNA gene analyses. DNA relatedness varied from 5(.)2 to 41(.)7% among the isolates of cluster 2 and reference strains for Sinorhizobium species. Considering the existence of distinctive features among these two groups and related species within the genera Rhizobium and Sinorhizobium, we propose two novel species, Rhizobium indigoferae sp. nov. for cluster 1, with isolate CCBAU 71714(T) (= AS 1.3046(T)) as the type strain, and Sinorhizobium kummerowiae sp. nov. for cluster 2, with isolate CCBAU 71042(T) (= AS 1.3045(T)) as the type strain MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000179838100045 L2 - Rhizobium indigoferae;Sinorhizobium kummerowiae;diversity;phylogeny;ROOT NODULE BACTERIA; CICER-ARIETINUM L; GEN-NOV; PHYLOGENETIC ANALYSIS; SESBANIA-HERBACEA; DNA; NITROGEN; LEGUMES; JAPONICUM; STRAINS SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():2231-2239 7138 UI - 9742 AU - Weigel BM AU - Henne LJ AU - Martinez-Rivera LM AD - Wisconsin Dept Nat Resources, Bur Integrated Sci Serv, Monona, WI 53716, USALos Alamos Natl Lab, Ecol Grp, RRES ECO, Los Alamos, NM 87545, USAUniv Guadalajara, Inst Manantlan Ecol & Conservac Biodiversidad, Autlan 48900, Jalisco, MexicoWeigel, BM, Wisconsin Dept Nat Resources, Bur Integrated Sci Serv, 1350 Femrite Dr, Monona, WI 53716 USA TI - Macroinvertebrate-based index of biotic integrity for protection of streams in west-central Mexico AB - The water and habitat quality of many streams in west-central Mexico are influenced by municipal and industrial effluent, as well as water diversion for irrigation, livestock, and deforestation. Restoration efforts have been hampered by a lack of clear standards against which to judge the degree and trend in environmental degradation. We describe the development and characteristics of a macroinvertebrate-based index of biotic integrity (IBI) designed to provide such standards. Eight metrics chosen a priori comprised the IBI: catch per unit effort, generic richness, % Ephemeroptera-Plecoptera-Trichoptera genera, % Chironomidae individuals, Hilsenhoff Biotic Index, % depositional individuals, % predator individuals, and % gatherer genera. Each metric distinguished sites with minimum or moderate human influence from sites with severe influence. The IBI was developed with data from 27 sites and validated with 6 others. Values from the development data set correlated well with the measures of human influence based on qualitative assessment of habitat and water quality (Pearson's r = 0.86). IBI values for 7 sites on Rio Ayuquila corresponded with a documented longitudinal pattern of human influence and the existing fish-based IBI (Pearsoris r = 0.87). This macroinvertebrate IBI shows promise for developing biological standards, facilitating long-term monitoring, and improving ecological integrity of streams in west-central Mexico MH - Mexico|Jalisco MH - USA PB - LAWRENCE: NORTH AMER BENTHOLOGICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0887-3593 UR - ISI:000179505500013 L2 - IBI;macroinvertebrates;metrics;biomonitoring;bioassessment;water quality;streams;benthos;Mexico;SIERRA-DE-MANANTLAN; BENTHIC MACROINVERTEBRATES; RIVER HEALTH; ASSEMBLAGES; FRAMEWORK; POLLUTION; RICHNESS; FISHES SO - Journal of the North American Benthological Society 2002 ;21(4):686-700 7139 UI - 11753 AU - Weirich G AU - Junker K AU - Salles PGO AU - Lim SD AU - de Peralta-Venturina MN AU - varado-Cabrero I AU - Jimenez RE AU - Cabras AD AU - Hofler H AU - Schubert J AU - Amin MB AD - Tech Univ Munich, Inst Pathol, D-8000 Munich, GermanyUniv Jena, Dept Urol, D-6900 Jena, GermanyEmory Univ, Dept Pathol, Atlanta, GA 30322, USAHenry Ford Hosp, Dept Pathol, Detroit, MI 48202, USAMexican Oncol Hosp, Mexico City, DF, MexicoGSF, Res Ctr, Neuherberg, Germany TI - Comparative genomic hybridization analysis of renal oncocytomas (RO), chromophobe renal cell carcinomas (CHRCC) and tumors with hybrid histology - Hybrid Oncocytic Tumors (HOT) MH - Germany MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000173388900802 SO - Modern Pathology 2002 ;15(1):186A-186A 7140 UI - 11755 AU - Weirich G AU - Junker K AU - Salles PGO AU - Lim SD AU - de Peralta-Venturina MN AU - varado-Cabrero I AU - Jimenez RE AU - Cabras AD AU - Hofler H AU - Schubert J AU - Amin MB AD - Tech Univ Munich, Inst Pathol, D-8000 Munich, GermanyUniv Jena, Dept Urol, D-6900 Jena, GermanyEmory Univ, Dept Pathol, Atlanta, GA 30322, USAHenry Ford Hosp, Dept Pathol, Detroit, MI 48202, USAMexican Oncol Hosp, Mexico City, DF, MexicoGSF, Res Ctr, Neuherberg, Germany TI - Comparative genomic hybridization analysis of renal oncocytomas (RO), chromophobe renal cell carcinomas (CHRCC) and tumors with hybrid histology - Hybrid Oncocytic Tumors (HOT) MH - Germany MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000173379700791 SO - Laboratory Investigation 2002 ;82(1):186A-186A 7141 UI - 11101 AU - Weisbach C AU - Tiessen H AU - Jimenez-Osornio JJ AD - Univ Saskatchewan, Dept Soil Sci, Saskatoon, SK S7N 5A8, CanadaUniv Autonoma Yucatan, PROTROPICO, Merida 97110, Yuc, MexicoTiessen, H, Univ Saskatchewan, Dept Soil Sci, 51 Campus Dr, Saskatoon, SK S7N 5A8, Canada TI - Soil fertility during shifting cultivation in the tropical Karst soils of Yucatan AB - As the bush fallow portion of shifting cultivation in Yucatan is shortened from the traditional 25-30 years to 6-12 years, soil productivity declines. Soil properties associated with this decline have not been documented because of the extreme short-range soil variability on Yucatan's limestone shield with its mosaic of black and red soils. We examined soil fertility and organic matter in sites representing stages of shifting cultivation in the context of pedogenic differences. Black soils contained twice as much organic matter, more total P and three times more available P than red soils. At the end of the cultivation cycle both soils had lost one quarter of their organic matter relative to the longest fallow. Available P was 40% lower in the red, but similar in the black soils. All organic matter and nutrient levels were higher than in non-calcareous semiarid tropical soils elsewhere, and the productivity decline was attributed to interactions between P and K supply and available water MH - Canada MH - Mexico|Yucatan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Article AV - English IS - 0249-5627 UR - ISI:000175817900002 L2 - slash-burn cultivation;calcareous soil;Milpa;soil organic matter;soil variability;ORGANIC-MATTER; CONSEQUENCES; MEXICO SO - Agronomie 2002 ;22(3):253-263 7142 UI - 10894 AU - White JW AU - Corbett JD AU - Dobermann A AD - CIMMYT, Mexico City 06600, DF, MexicoMud Springs Geographers Inc, Temple, TX 76501, USAUniv Nebraska, Dept Agron & Hort, Lincoln, NE 68583, USAWhite, JW, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Insufficient geographic characterization and analysis in the planning, execution and dissemination of agronomic research? AB - Understanding spatial variation in crop response to environment and management is an essential component of agronomic research. Given the increasing availability of geographic information systems (GISs) and spatial data, one might anticipate widespread use of maps, reference to geographic variation, and analyses that capitalize on the power of GIS. Such use would be reflected in improved selection of research sites or treatments, better understanding of the influence of climatic or edaphic factors on crop responses, and more easily interpretable, quantitative results presented through maps. With the notable exception of research on individual fields or local landscapes, however, published research indicated insufficient use of spatial information and analyses or even explicit consideration of the geographical context of research. To assess use of geographic information in agronomic research, we examined papers in five prominent agricultural journals for evidence of analyses at a spatial scale smaller than field plots or local landscapes but larger than national or continental levels, which we term "mesoscale". Use of simulation models was also examined since models can quantify response to environmental factors and thus, their use might provide instructive comparisons with use of spatial analyses. Of 250 papers considered, less than half (119 papers) described the geographic context of the research, and only 90 gave geographic coordinates with sufficient precision to locate sites within a 10 km radius. Only six papers included maps of the study area. Over 150 papers used single locations, and just 26 papers, more than four sites. In experiments creating variation in soil conditions, such as through irrigation, tillage, or nutrient treatments, the limited number of treatment combinations appeared to constrain quantitative interpretation of results. Most papers involving simulation models focused on model development or validation; models were seldom used to analyze effects of climatic or edaphic conditions as a complement to other lines of research. We conclude that there is need to increase the geographic relevance of agronomic research, Suggested step, include selecting sites using an explicit sampling strategy, using larger numbers of sites, and analyzing and presenting results using tools such as GIS and crop or ecosystem simulation models. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000176281000004 L2 - adaptation;field experimentation;geographic information systems;simulation models;spatial analysis;INFORMATION-SYSTEMS; SOIL FERTILITY; WEST-AFRICA; RICE; MANAGEMENT; GIS; REGIONS; MAIZE; YIELD; SCALE SO - Field Crops Research 2002 ;76(1):45-54 7143 UI - 9867 AU - Whitehouse M AU - Agnarsson I AU - Miyashita T AU - Smith D AU - Cangialosi K AU - Masumoto T AU - Li DQ AU - Henaut Y AD - Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Ctr, IL-84990 Sede Boqer, IsraelUniv Queensland, Dept Zool & Entomol, Brisbane, Qld 4072, AustraliaGeorge Washington Univ, Dept Biol Sci, Washington, DC 20052, USAUniv Tokyo, Sch Agr & Life Sci, Biol Sci Lab, Tokyo 1138657, JapanUniv Kansas, Dept Ecol & Evolutionary Biol, Entomol Program, Lawrence, KS 66045, USAKeene State Univ, Dept Biol, Keene, NH 03435, USAKyoto Univ, Ctr Ecol Res, Otsu, Shiga 5202113, JapanNatl Univ Singapore, Dept Biol Sci, Singapore 119260, SingaporeEl Colegio Frontera Sur, Lab Ecoetol Artropodos, Tapachula, Chiapas, MexicoWhitehouse, M, Australian Cotton Res Inst, CSIRO Entomol, Locked Bag 59, Narrabri, NSW 2390, Australia TI - Argyrodes: Phylogeny, sociality and interspecific interactions - A report on the Argyrodes symposium, Badplaas 2001 AB - Argyrodes Simon 1864 is a large, cosmopolitan theridiid genus whose members exhibit a wide range of foraging techniques which usually involve exploiting other spiders, either by using their webs, stealing their food, or preying on them directly. We held a symposium on this genus at the 15th International Congress of Arachnology, Badplaas, South Africa in order to obtain a clearer perspective on the relationship between the phylogeny of the genus and the different foraging techniques. We concluded that Argyrodes forms a monophyletic group within the Theridiidae, and that there are clear monophyletic clades within the genus (already identified as species groups) that appear to share behavioral characteristics. We found no clear indication that foraging behaviors such as kleptoparasitism (stealing food) evolved from araneophagy (eating spiders) or vice versa. However, it appears that species that specialize in either kleptoparasitism or araneophagy use additional techniques in comparison to species that readily use both foraging modes. During our examination of Argyrodes/host interactions we noted the importance of Nephila species as hosts of Argyrodes species around the world and the impact of Argyrodes on Nephila. We also noted the fluid nature of the relationship between Argyrodes and the spiders with which they interact. For example, an Argyrodes/host relationship can change to an Argyrodes/prey relationship, and the type of kleptoparasitic behavior employed by an Argyrodes can change when it changes host species. The importance of eating silk was also noted and identified as an area for further research. We concluded that more work involving international collaboration is needed to fully understand the phylogeny of the genus and the relationships between the different types of foraging behaviors MH - Australia MH - Israel MH - Japan MH - Mexico|Chiapas MH - Singapore MH - USA PB - NEW YORK: AMER ARACHNOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0161-8202 UR - ISI:000179124600008 L2 - KLEPTOPARASITIC SPIDER; THERIDIIDAE; ARANEAE; ANTIPODIANA; TRIGONUM; BEHAVIOR SO - Journal of Arachnology 2002 ;30(2):238-245 7144 UI - 9267 AU - Whitfield SB AU - Myers T AU - Bjelland M AU - Wehlitz R AU - Jimenez-Mier J AU - Olalde-Velasco P AU - Krause MO AD - Univ Wisconsin, Dept Phys & Astron, Eau Claire, WI 54702, USAUniv Wisconsin, Dept Chem, Eau Claire, WI 54702, USAUniv Wisconsin, Ctr Synchrotron Radiat, Stoughton, WI 53589, USAUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Cent Florida, Dept Phys, Orlando, FL 32816, USAWhitfield, SB, Univ Wisconsin, Dept Phys & Astron, Eau Claire, WI 54702 USA TI - Angular distributions of the atomic scandium 3d and 4s photoelectrons in the region of the 3p -> 3d giant resonance AB - A determination of the angular distribution parameter beta of the 3d and 4s main lines of atomic scandium in the resonance region of the 3p-->nd,ms excitations has been carried out using electron spectrometry in conjunction with monochromatized synchrotron radiation., These measurements reveal strong variations of beta8 throughout the entire resonance region, highlighting the complicated nature of the ionization process for this first and seemingly simple 3d transition metal. The beta values-of the photoelectrons resulting in 4s subshell, ionization deviate significantly from 2.0 in qualitative, but not-quantitative, agreement with recent many-body perturbation-theory calculations MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000180656800004 L2 - OPEN-SHELL ATOMS; PHOTOIONIZATION; SPECTROMETRY; SUBSHELLS; CHLORINE SO - Physical Review A 2002 ;66(6): 7145 UI - 10817 AU - Whittington D AU - Matsui-Santana O AU - Freiberger JJ AU - Van Houtven G AU - Pattanayak S AD - Univ N Carolina, Sch Publ Hlth, Chapel Hill, NC 27599, USAUniv Guadalajara, Ctr Univ Ciencias Salud, Guadalajara 44430, Jalisco, MexicoCtr Econ Res, Res Triangle Inst, Res Triangle Pk, NC 27709, USAWhittington, D, Univ N Carolina, Sch Publ Hlth, Campus Box 7400, Chapel Hill, NC 27599 USA TI - Private demand for a HIV/AIDS vaccine: evidence from Guadalajara, Mexico AB - The private demand for a hypothetical vaccine that would provide lifetime protection against HIV/AIDS to an uninfected adult was measured in Guadalajara, Mexico, using the concept of willingness to pay (WTP). A 91-question survey instrument was administered by trained enumerators employing contingent valuation techniques to 234 adults, aged 18-60. Our estimates of private demand indicate that individuals anticipate sizable personal benefits from such a vaccine, and that they would be willing to allocate a substantial portion of their income to be protected in this way from HIV infection. A conservative estimate of the mean WTP of adults in the Guadalajara sample is 6358 pesos (US$ 669) and the median is 3000 pesos (US$ 316). A multivariate statistical analysis of the determinants of individuals' WTP shows that individuals with hi-her incomes, with spouses or partners, and with higher perceived risks of becoming infected with HIV are willing to pay more for the vaccine. Older respondents are willing to pay less. These results suggest that there is likely to be a potentially large private market for a HIV/AIDS vaccine in the middle-income developing countries such as Mexico. These findings have important implications both for the level of R&D effort that is devoted to a vaccine and, assuming these efforts are successful, for future policies to make the vaccine available to the public. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Jalisco MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Immunology;Medicine, Research & Experimental;Veterinary Sciences U5 - J;Article AV - English IS - 0264-410X UR - ISI:000176456200021 L2 - willingness to pay;HIV/AIDS vaccine;contingent valuation method;demand assessment;CONTINGENT VALUATION; CARE SO - Vaccine 2002 ;20(19-20):2585-2591 7146 UI - 11477 AU - Wilcox HC AU - Wagner FA AU - Anthony JC AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, ELCID, Baltimore, MD 21205, USAInst Nacl Psiquiatria, Dept Invest Sistemas Salud, Div Estudios Epidemiol & Sociales, Mexico City 13810, DF, MexicoAnthony, JC, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, ELCID, 624 N Broadway,ELCID 893, Baltimore, MD 21205 USA TI - Exposure opportunity as a mechanism linking youth marijuana use to hallucinogen use AB - The aim of this study is to shed light upon an observed association between the use of marijuana and hallucinogens (e.g. LSD), with a specific focus on the idea that two separate mechanisms might link marijuana use to hallucinogen use: (1) greater hallucinogen exposure opportunity for marijuana users versus nonusers; (2) increased probability of hallucinogen use for marijuana users versus nonusers, once the opportunity to use hallucinogens has occurred. This work is based on a novel analysis of retrospective, self report data from more than 40000 young participants in the 1991-1994 National Household Surveys on Drug Abuse (NHSDA), with discrete time survival analysis models. Youths who had used marijuana were substantially more likely than nonusers to have the opportunity to use hallucinogens (estimated unadjusted relative risk, uRR = 16.3; 95%. Confidence interval (CI) = 14.3-18.6). Once an opportunity to use hallucinogens occurred, marijuana users were more likely than nonusers to initiate hallucinogen use (uRR = 12.6; 95% CI = 9.0-17.6). This evidence provides a more complete view of interconnections between marijuana use and hallucinogen use, and helps to clarify the pivotal role for drug exposure opportunities. Important next steps will be to understand what accounts for variation in the exposure opportunities experienced by marijuana users, and to understand why some marijuana users do not progress even when they have a chance to do so. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 12 U4 - Substance Abuse;Psychiatry U5 - J;Article AV - English IS - 0376-8716 UR - ISI:000174839700004 L2 - hallucinogens;marijuana smoking;survival analysis;drug history;transitions;National Household Survey;epidemiology;DRUG INVOLVEMENT; COCAINE; ADOLESCENCE; MODELS SO - Drug and Alcohol Dependence 2002 ;66(2):127-135 7147 UI - 10274 AU - Willcox MC AU - Khairallah MM AU - Bergvinson D AU - Crossa J AU - Deutsch JA AU - Edmeades GO AU - Gonalez-de-Leon D AU - Jiang C AU - Jewell DC AU - Mihm JA AU - Williams WP AU - Hoisington D AD - USDA ARS, Crop Sci Res Lab, Corn Host Plant Resistance Res Unit, Mississippi State, MS 39762, USACIMMYT Int, Mexico City 06600, DF, MexicoCIMMYT Int, Mt Pleasant, ZimbabweFrench Agr Res Inc, Lamberton, MN 56152, USAGarst Seed Co, Marshall, MO 65340, USAPioneer HiBred Int Inc, Waimea Res Ctr, Waimea, HI 96796, USAMonsanto Co, St Louis, MO 63198, USAWillcox, MC, USDA ARS, Crop Sci Res Lab, Corn Host Plant Resistance Res Unit, Box 9555, Mississippi State, MS 39762 USA TI - Selection for resistance to southwestern corn borer using marker-assisted and conventional backcrossing AB - Two maize (Zea mays L) lines, susceptible and resistant to first-generation southwestern corn borer (SWCB), Diatraea grandiosella Dyar, were hybridized then backcrossed to the susceptible parent to form a population that was selected over three backcross generations by either marker-assisted or conventional selection for resistance to first generation SWCB leaf feeding. Quantitative trait loci (QTL) mapping was done by BC1F1 genotyping and BC1F2 infestation with SWCB. Three putative QTL were identified on chromosomes 7,9, and 10 accounting for 28% of the phenotypic variance. Marker-assisted selection (MAS) proceeded by selecting plants heterozygous at the QTL regions and homozygous for the recurrent parent genotype outside the QTL regions in the BC1F1 and BC2F1 generations. BC2F2 individuals were selected for the homozygous donor genotype in the QTL regions. Conventional selection initiated from the most resistant 30 BC1F2 lines. Conventional trials of BC2F2 and BC2F3 families were infested with SWCB and based on leaf damage ratings selected selfed progeny of the former generation formed the subsequent trial entries. A comparative trial of BC2F3 lines, selected by the two methods, was evaluated under SWCB infestation at three locations. Leaf damage ratings were taken at all locations and larvae weight was taken at one location. No significant differences for leaf damage ratings or larvae weight were found between lines selected by the two methods. Both methods produced lines significantly improved over the susceptible parent for SWCB leaf feeding damage indicating that the methods were equivalent as conducted in this experiment MH - Mexico|Distrito Federal MH - USA MH - Zimbabwe PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000177928000019 L2 - QUANTITATIVE TRAIT LOCI; BACTERIAL-BLIGHT RESISTANCE; LEAF FEEDING RESISTANCE; TROPICAL MAIZE; GENOMIC REGIONS; QTL; BARLEY; GENES; RICE; INTROGRESSION SO - Crop Science 2002 ;42(5):1516-1528 7148 UI - 11001 AU - Willems EW AU - Valdivia LF AU - Villalon CM AU - Saxena PR AD - Victor Chang Cardiac Res Inst, Sydney, NSW, AustraliaErasmus Univ, Med Ctr, Dutch Migraine Res Grp, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsErasmus Univ, Med Ctr, Inst Cardiovasc Res, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Pharmacol, Mexico City 07738, DF, Mexico TI - alpha-Adrenoceptors and acute migraine therapy AB - In contrast to the well-established role of serotonin (5-hydroxytryptamine; 5-HT) 5-HT1B receptors in mediating constriction within the carotid vascular bed of dogs and pigs, the role of alpha-adrenoceptors and their subtypes has not been as well understood. Using experimental animal models and alpha(1)-adrenoceptor and alpha(2)-adrenoceptor agonists (phenylephrine and BHT-933, respectively) and antagonists (prazosin and rauwolscine, respectively), it was recently shown that activation of either receptor produces a cranioselective vasoconstriction. Subsequently, investigations employing relatively selective antagonists at alpha(1)- (alpha(1A), alpha(1B), alpha(1D)) and alpha(2)- (alpha(2A), alpha(2B), alpha(2C)) adrenoceptor subtypes revealed that specific receptors mediate carotid vasoconstrictor responses. Since alpha(1B)-adrenoceptors and alpha(2C)-adrenoceptors do not seem to play an important role in the cardiovascular regulation, it is suggested that selective agonists at these receptors may provide a promising novel avenue for the development of acute antimigraine drugs. (C) 2002 Prous Science. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - Netherlands PB - BARCELONA: PROUS SCIENCE, SA RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0214-0934 UR - ISI:000176037900003 L2 - SUBTYPES MEDIATING VASOCONSTRICTION; ARTERIOVENOUS ANASTOMOSES; SAPHENOUS-VEIN; CAROTID CIRCULATION; ANESTHETIZED PIGS; ALPHA(1)-ADRENOCEPTOR; RECEPTORS; ALPHA(2)-ADRENOCEPTOR; CONTRACTION; HEADACHE SO - Drug News & Perspectives 2002 ;15(3):140-146 7149 UI - 10733 AU - Williams DM AU - Leigh J AU - Ramirez-Amador V AU - Kaonga K AU - Russo D AU - Schiodt M AD - Barts & London Queen Marys Sch Med & Dent, London E1 2AD, EnglandLouisiana State Univ, Hlth Sci Ctr, New Orleans, LA, USAUniv Autonoma Metropolitana Xochimilco, Mexico City, DF, MexicoUniv Teaching Hosp, Lusaka, ZambiaNIH, Bethesda, MD 20892, USACopenhagen Cty Univ Hosp, Glostrup, DenmarkWilliams, DM, Barts & London Queen Marys Sch Med & Dent, Turner St, London E1 2AD, England TI - Host pathogen interaction and the development of oral lesions AB - The aetiologies of oral ulceration, disseminated interstitial lymphocytosis syndrome and oral lymphomas have been reviewed, with emphasis on the role of HIV infection in the primary causation or modification of the presentation of these entities. There is a paucity of evidence to explain why oral ulceration is so severe in HIV infection, and why major ulceration affects the oropharynx. A number of mechanisms have been proposed to account for the development of lymphomas in patients with HIV infection, including a genetic predisposition, decreased immunosurveillance due to HIV infection, alteration of endothelial cell function and dysregulation of cytokine networks. From this review, it was concluded that there is a need for a prospective multicentre study, to elucidate the aetiological mechanisms involved in lymphomas of the oral regions in this patient group. It was concluded that, although there is anecdotal evidence implicating tobacco use in the aetiology of the lesions reviewed, this is insufficient to allow definitive statements to be made and further systematic evaluation is indicated MH - Denmark MH - United Kingdom MH - Mexico|Distrito Federal MH - USA MH - Zambia PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 1 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1354-523X UR - ISI:000176662600023 L2 - recurrent aphthous stomatitis;disseminated interstitial lymphocytosis syndrome;lymphoma;TUMOR-NECROSIS-FACTOR; ACQUIRED-IMMUNODEFICIENCY-SYNDROME; RECURRENT APHTHOUS STOMATITIS; INFILTRATIVE LYMPHOCYTOSIS SYNDROME; PAROTID-GLAND ENLARGEMENT; EFFUSION LYMPHOMA-CELLS; FACTOR-ALPHA PRODUCTION; 65-KDA STRESS PROTEIN; HIV-INFECTED PATIENTS; NON-HODGKINS-LYMPHOMA SO - Oral Diseases 2002 ;8():120-125 7150 UI - 9713 AU - Williams K AU - Hanley AJG AU - Gonzalez-Villalpando C AU - d'Agostino R AU - Wagenknecht LE AU - Stern MP AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, San Antonio, TX, USAMt Sinai Hosp, Samuel Lunenfeld Res Inst, Toronto, ON, CanadaAmer British Cowdray Hosp, Ctr Studies Diabet, Mexico City, DF, MexicoWake Forest Univ, Sch Med, Winston Salem, NC, USA TI - Prediction of Type 2 diabetes (DM) using simple measures of insulin resistance: combined results from the San Antonio Heart Study (SAHS), the Mexico City Diabetes Study (MCDS), and the Insulin Resistance Atherosclerosis Study (IRAS) MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000177813600212 SO - Diabetologia 2002 ;45():A72-A72 7151 UI - 11376 AU - Winfield I AU - Alvarez F AU - Ortiz M AD - Univ Nacl Autonoma Mexico, Escuela Nacl Estudios Profes, Ecol Lab, Tlalnepantla 54090, Mexico, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoUniv La Habana, Ctr Invest Marinas, Havana, CubaWinfield, I, Univ Nacl Autonoma Mexico, Escuela Nacl Estudios Profes, Ecol Lab, Apartado Postal 314, Tlalnepantla 54090, Mexico, Mexico TI - A new species of Anilocra (Crustacea : Isopoda : Cymothoidae), ectoparasitic on the mako shark Isurus oxyrinchus AB - The description of a new species of the isopod genus Anilocra (Cymothoidae), ectoparasitic on the shark Isurus oxyrinchus, from the Gulf of Mexico, off the Port of Veracruz, is presented. The diagnostic characters of Anilocra elviae are: ornamentations in the first four pereonites, large eyes, bilobed labium, 14 setae on the third article of the mandibular palp, dactyli of pereiopods 1-6 strongly curved, pleopods thick and large, and uropods extending well beyond the posterior margin of the pleotelson MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 2 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000174990400012 SO - Proceedings of the Biological Society of Washington 2002 ;115(1):148-152 7152 UI - 11682 AU - Wolf M AU - Harmanec P AU - Diethelm R AU - Hornoch K AU - Eenens P AD - Charles Univ, Astron Inst, CR-18000 Prague 8, Czech RepublicAcad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech RepublicUniv Basel, Astron Inst, CH-4102 Binningen, SwitzerlandUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoWolf, M, Charles Univ, Astron Inst, V Holesovickach 2, CR-18000 Prague 8, Czech Republic TI - Apsidal motion and light-time effect in eclipsing binaries HS Herculis and U Ophiuchi AB - Several new times of minima, based on photoelectric observations, have been secured for two bright and well-known eclipsing binaries with eccentric orbits and with very similar orbital periods: HS Her (P = 1.(d)637, e = 0.02) and U Oph (P = 1.(d)677, e = 0.003). For HS Her, an apsidal motion with a period of 78 years is confirmed and a third body in an eccentric orbit with a period of 85 years is found. An analysis of all available eclipse timings of U Oph has confirmed the presence of an apsidal motion with one of the shortest known periods (20.1 yr) and a light-time effect with the improved period of 37.6 yr. The corresponding internal structure constants log k(2) were also derived. It is estimated that the tertiaries of both systems are detectable via speckle interferometry MH - Czech Republic MH - Mexico|Guanajuato MH - Switzerland PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000174184400014 L2 - stars : binaries : eclipsing;stars : individual : HS Her;stars : individual : U Oph;stars : fundamental parameters;STELLAR STRUCTURE; EPHEMERIS; SYSTEMS; PERIOD; STARS SO - Astronomy & Astrophysics 2002 ;383(2):533-539 7153 UI - 10187 AU - Worley JH AU - Castillo GR AU - Geneste L AU - Grabot B AD - ENIT, LGP, F-65016 Tarbes, FrancePanamer Univ, Dept Appl Engn, Mexico City 03920, DF, MexicoWorley, JH, ENIT, LGP, Ave Azereix BP 1629, F-65016 Tarbes, France TI - Adding decision support to workflow systems by reusable standard software components AB - Industrial information systems like Enterprise Resource Planning (ERP) systems are increasingly comprehensive and integrated. Nevertheless, satisfying all the user requirements regarding information processing or decision support within a unique tool seems still to be unrealistic. As a consequence, being able to quickly provide the users with additional pieces of software for supporting specific decisions remains more than ever a topic of interest. Specific developments take time, are costly, have usually low reliability and are often poorly integrated with the main information system. In order to address these drawbacks, we suggest a structure and the first elements of a toolbox aimed at allowing an easier development of additional pieces of information/decision support system (DSS) by reuse of standard software components. This toolbox allows the implementation of workflow and groupware facilities and the communication between modules is achieved through a database which provides the integration with the main information system. The first decision support modules developed include an expert system generator, a neural network simulator, a simplex module and a Case-Based Reasoning (CBR) module. Examples of applications developed using this toolbox are described, and a development methodology is suggested. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Interdisciplinary Applications U5 - J;Article AV - English IS - 0166-3615 UR - ISI:000178302900011 L2 - workflow;groupware;decision support;modularity;distribution;artificial intelligence;MANAGEMENT SO - Computers in Industry 2002 ;49(1):123-140 7154 UI - 9809 AU - Wrackmeyer B AU - Kohler C AU - Milius W AU - Grevy JM AU - Garcia-Hernandez Z AU - Contreras R AD - Univ Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, GermanyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62000, Morelos, MexicoWrackmeyer, B, Univ Bayreuth, Anorgan Chem Lab, Postfach 101251, D-95440 Bayreuth, Germany TI - Aminophosphanes with bulky amino groups: Molecular structure, coupling constants (1)J(P-31,N-15) and (2)J(P-31,Si-29), and isotope-induced chemical shifts (1)Delta N-14/15(P-31) AB - The preferred conformation of amino-phosphanes with bulky, amino groups (1-20) was determined by, NMR spectroscopy in solution, in two cases in the solid state (11, 17) and in one case (11) by X-ray, crystallography. Trimethylsilylaminodiphenylphosphanes Ph2PN(R)SiMe3 (R = Bu (1), Ph (2), 2-pyridyl (3), 2-pyrimidyl (4), Me3Si (5)), amino(chloro)phenylphosphanes Ph(Cl)PNRR' (R = BZ, R' = Me (6), R = Bz, R' = Bu-t (7), R = Et, R' = Ph (8)), amino(chloro)tert-butylphosphanes Bu-t(Cl)PNRR' (R = R' = Pr-i (9), R = Me, R' = Bu-t (10), R = Bz, R' = Bu-t (11), R = H, R' = Bu-t (12), R = Et, R' = Ph (13), R = Pr-i; R' = Ph (14), R = Bu, R' = Ph (15), R = Bz, R' = Ph (16), R = R' = Ph (17), R = R' = Me3Si (18)), 3-tert-butyl-2-chloro-1,3,2-oxazaphospholane (19), and benzyl(tert-butyl)aminodichlorophosphane (20) were studied by H-1, C-13, N-15, Si-29, and P-31 NMR spectroscopy. In all cases, the more bulky, substituent at the nitrogen atom prefers the syn-position with respect to the assumed orientation of the phosphorus lone pair of electrons. Many of the derivatives studied adopt this preferred conformation even at room temperature. Numerous signs of coupling constants (1)J(P-31, N-15), (2)J(P-31, C-13), (2)J(P-31, and, Si-29) were determined. Low temperature NMR spectra were measured for derivatives for which rotation about the P-N bond at room temperature is fast, showing the presence of two rotamers at low temperature. The respective conformation of these rotamers could be assigned by C-13, N-15, and P-31 NMR spectroscopy. Isotope-induced chemical shifts (1)Delta N-15/14 (P-31) were determined for all compounds at natural abundance of N-15 by using Hahn-echo extended polarization transfer experiments. The molecular structure of 11 in the solid state reveals pyramidal surroundings of the nitrogen atom and mutual trans-positions of the tert-butyl groups at phosphorus and nitrogen. (C) 2002 Wiley Periodicals, Inc MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1042-7163 UR - ISI:000179284200013 L2 - EXTENDED PULSE SEQUENCES; MULTINUCLEAR MAGNETIC-RESONANCE; P-31 NMR; POLARIZATION TRANSFER; SIGN DETERMINATION; NATURAL-ABUNDANCE; ELECTRON-DIFFRACTION; SULFUR DIIMIDES; GAS-PHASE; N-15 SO - Heteroatom Chemistry 2002 ;13(7):667-676 7155 UI - 9919 AU - Wright R AU - De La Cruz-Reyna S AU - Harris A AU - Flynn L AU - Gomez-Palacios JJ AD - Univ Hawaii, SOEST, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoWright, R, Univ Hawaii, SOEST, Hawaii Inst Geophys & Planetol, 2525 Correa Rd, Honolulu, HI 96822 USA TI - Infrared satellite monitoring at Popocatepetl: Explosions, exhalations, and cycles of dome growth AB - [1] Since December 1994, activity at Popocatepet1 has evolved through two main phases. The first was characterized by elevated seismic activity, degassing, and emissions of predominantly lithic ash. However, in March 1996 the volcano entered a magmatic phase, which has involved the emplacement of at least eight lava domes within its summit crater. We have used infrared radiance data acquired by the GOES meteorological satellite alongside ground-based geophysical data sets to analyze aspects of this activity. We develop a technique to identify magmatic activity at the volcano. In the absence of a volcanic heat source the radiance emitted from the "hottest'' pixel (P-r) contained within a 10 x 10 pixel GOES subscene centered on Popocatepet1's summit is well correlated with the average radiance emitted by the remaining pixels (B-r) because at any given time all pixels within the target box have similar temperatures, varying as a function of season, cloud cover, and solar irradiance. However, during periods of heightened volcanic activity the radiance emitted by the hottest pixel varies as a function of a time-independent volcanic heat source and changes in P-r and B-r become decorrelated, allowing volcanic activity to be identified. Exhalations (intermittent ash emissions) cannot be identified by routine analysis of GOES data because of the low intensity of the associated thermal anomalies. Explosions, however, produce distinctive radiance signatures and can be reliably documented. Two dome growth episodes occurred during our study period, one in November-December 1998 and the other during February 2000. Although the techniques we describe identified the 1998 dome event, the 2000 dome went undetected. This is explained in terms of their contrasting emplacement styles. The 1998 dome was apparent to GOES due to the explosions that disrupted its cool carapace, scattered hot bombs around the summit cone, and exposed its hotter interior to the satellite sensor. In contrast, the February 2000 dome was not apparent because elevated explosive activity did not accompany its emplacement MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000178993000008 L2 - Popocatepetl;remote sensing;GOES;lava domes;LASCAR VOLCANO; KILAUEA VOLCANO; SOUFRIERE-HILLS; SULFUR-DIOXIDE; ERUPTION; TIME; CHILE; RADIOMETER; MEXICO; CHRONOLOGY SO - Journal of Geophysical Research-Solid Earth 2002 ;107(B8): 7156 UI - 10588 AU - Wright RO AU - Hu H AU - Silverman EK AU - Tsaih SW AU - Schwartz J AU - Ettinger A AU - Hernandez-Avila M AD - Natl Inst Publ Hlth, Cuernavaca, Morelos, MexicoHarvard Sch Publ Hlth, Cambridge, MA, USAHarvard Univ, Sch Med, Channing Lab, Cambridge, MA 02138, USA TI - Apoliprotein E genotype and lead exposure in predicting 24 month infant Bayley Scale score MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000176378600664 SO - Epidemiology 2002 ;13(4):S208-S208 7157 UI - 11248 AU - Wright RO AU - Hu H AU - Tsaih S AU - Schwartz J AU - Silverman EK AU - Weiss ST AU - Hernandez-Avila M AD - Brown Univ, Sch Med, Providence, RI 02912, USAHarvard Univ, Sch Med, Channing Lab, Boston, MA 02115, USANatl Inst Publ Hlth, Cuernavaca, Morelos, Mexico TI - The H63D hemochromatosis gene variant is associated with higher hemoglobin levels among 2 year old children MH - Mexico|Morelos MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714600792 SO - Pediatric Research 2002 ;51(4):136A-136A 7158 UI - 11250 AU - Wright RO AU - Hu H AU - Tsaih SW AU - Schwartz J AU - Silverman EK AU - Ettinger A AU - Hernandez-Avila M AD - Brown Med Sch, Providence, RI, USAHarvard Univ, Sch Med, Channing Lab, Boston, MA 02115, USANatl Publ Hlth Inst, Cuernavaca, Morelos, Mexico TI - Apolipoprotein E genotype predicts 24 month infant MDI Bayley scale MH - Mexico|Morelos MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000174714601150 SO - Pediatric Research 2002 ;51(4):198A-198A 7159 UI - 11337 AU - Wu J AU - Dai F AU - Gao M AU - Stojmenovic I AD - Florida Atlantic Univ, Dept Comp Sci & Engn, Boca Raton, FL 33431, USAUNAM, IIMAS, DISCA, Mexico City 04510, DF, MexicoUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaWu, J, Florida Atlantic Univ, Dept Comp Sci & Engn, Boca Raton, FL 33431 USA TI - On calculating power-aware connected dominating sets for efficient routing in ad hoc wireless networks AB - Efficient routing among a set of mobile hosts (also called nodes) is one of the most important functions in ad hoc wireless networks. Routing based on a connected dominating set is a promising approach, where the searching space for a route is reduced to nodes in the set. A set is dominating if all the nodes in the system are either in the set or neighbors of nodes in the set. Wu and Li [1] proposed a simple and efficient distributed algorithm for calculating connected dominating set in ad hoc wireless networks, where connections of nodes are determined by geographical distances of nodes. In general, nodes in the connected dominating set consume more energy in order to handle various bypass traffics than nodes outside the set. To prolong the life span of each node, and hence, the network by balancing the energy consumption in the network, nodes should be alternated in being chosen to form a connected dominating set. In this paper, we propose a method of calculating power-aware connected dominating set. Our simulation results show that the proposed approach outperforms several existing approaches in terms of life span of the network MH - USA MH - Canada MH - Mexico|Distrito Federal PB - SEOUL: KOREAN INST COMMUNICATIONS SCIENCES (K I C S) RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Information Systems;Telecommunications U5 - J;Article AV - English IS - 1229-2370 UR - ISI:000175100500008 L2 - ad hoc wireless networks;dominating sets;energy levels;mobile computing;routing;simulation SO - Journal of Communications and Networks 2002 ;4(1):59-70 7160 UI - 10459 AU - Xia XH AU - Marquez LA AU - Zagalak P AU - Moog CH AD - Univ Pretoria, Dept Elect Elect & Comp Engn, ZA-0002 Pretoria, South AfricaIRCCyN, UMR CNRS 6597, F-44321 Nantes 3, FranceAcad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague, Czech RepublicCICESE Res Ctr, Elect & Telecommun Dept, Ensenada 22800, Baja California, MexicoXia, XH, Univ Pretoria, Dept Elect Elect & Comp Engn, ZA-0002 Pretoria, South Africa TI - Analysis of nonlinear time-delay systems using modules over non-commutative rings AB - The theory of non-commutative rings is introduced to provide a basis for the study of nonlinear control systems with time delays. The left Ore ring of non-commutative polynomials defined over the field of meromorphic function is suggested as the framework for such a study. This approach is then generalized to a broader class of nonlinear systems with delays that are called generalized Roesser Systems. Finally, the theory is applied to analyze nonlinear time-delay systems. A weak observability is defined and characterized, generalizing the well-known linear result. Properties of closed submodules are then developed to obtain a result on the accessibility of such systems. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Czech Republic MH - France MH - Mexico|Baja California MH - South Africa PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000177558900010 L2 - accessibility;non-commutative rings;nonlinear systems;observability;ore rings;Roesser model;time delay;ALGEBRAICAL APPROACH SO - Automatica 2002 ;38(9):1549-1555 7161 UI - 11712 AU - Xiang ZQ AU - Gao GP AU - Reyes-Sandoval A AU - Cohen CJ AU - Li Y AU - Bergelson JM AU - Wilson JM AU - Ertl HCJ AD - Wistar Inst Anat & Biol, Philadelphia, PA 19104, USAUniv Penn, Inst Human Gene Therapy, Philadelphia, PA 19104, USAChildrens Hosp Philadelphia, Philadelphia, PA 19104, USAIPN, CICATA, Posgrado Biomed Mol, Mexico City 07738, DF, MexicoErtl, HCJ, Wistar Inst Anat & Biol, 3601 Spruce St, Philadelphia, PA 19104 USA TI - Novel, chimpanzee serotype 68-based adenoviral vaccine carrier for induction of antibodies to a transgene product AB - An E1-deletion-containing adenoviral recombinant based on the chimpanzee serotype 68 (AdC68) was developed to express the rabies virus glycoprotein. Mice immunized with this construct (AdC68rab.gp) developed antibodies to rabies virus and remained resistant to challenge with an otherwise lethal dose of rabies virus. In naive mice immunized intranasally, the rabies virus-specific antibody responses elicited by AdC68rab.gp were comparable with regard to both titers and isotype profiles to those induced by an adenoviral recombinant based on human serotype 5 (Adhu5) expressing the same transgene product. In contrast, subcutaneous immunization with the AdC68rab.gp vaccine resulted in markedly lower antibody responses to the rabies virus glycoprotein than the corresponding Adhu5 vaccine. Antibodies from AdC68rab.gp-immunized mice were strongly biased towards the immunoglobulin G2a isotype. The antibody response to the rabies virus glycoprotein presented by Adhu5rab.gp was severely compromised in animals preexposed to the homologous adenovirus. In contrast, the rabies virus-specific antibody response to the AdC68rab.gp vaccine was at most marginally affected by preexisting immunity to common human adenovirus serotypes, such as 2, 4, 5, 7, and 12. This novel vaccine carrier thus offers a distinct advantage over adenoviral vaccines based on common human serotypes MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 64 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000174039400010 L2 - RECOMBINANT ADENOVIRUS; IMMUNE-RESPONSES; RABIES VIRUS; IN-VIVO; ANTIGENS; VECTOR; DNA SO - Journal of Virology 2002 ;76(6):2667-2675 7162 UI - 9853 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - A calculation of dispersion relation K(omega) for Ag/MgF2 one-dimensional photonic band-gap structure AB - We present numerical results of dispersion relation K(omega) for one-dimensional photonic band-gap structures composed of periodic Ag/MgF2 thin films. In the calculation, both published experimental data and the Drude model are used to obtain the refraction index of the silver film. The numerical calculation is extensively detailed and the numerical results are readily verifiable with various numerical approaches. Therefore, our results invalidate immediately a set of results in the literature. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000179087900013 L2 - dispersion relation;Ag/MgF2;band-gap structure;SYSTEMS SO - Materials Letters 2002 ;56(6):945-947 7163 UI - 11885 AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - A simple method of forming small gold particles on a thin gold film AB - We have produced gold particles whose sizes range from several tenth nanometers up to about 1 mum. The small gold particles are distributed on a gold thin film of thickness 50-80 Angstrom. The method for the formation is simple. We first evaporated the gold thin film, and then applied DC field along the film. When the field increases from 0 to 30 V, and the measured current increases from 0 to 650 mA, the particles were formed. The sizes and the distribution distances could be controlled by the applied DC field. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000173616500010 L2 - gold particles;gold thin film;DC field;SURFACE-PLASMON-POLARITONS; FIELD MICROSCOPY; POLARIZABILITY; NANOPARTICLES; SCATTERING SO - Materials Letters 2002 ;52(4-5):301-303 7164 UI - 10955 AU - Xicotencatl MA AD - Max Planck Inst Math, D-53072 Bonn, GermanyCINVESTAV, IPN, Dept Matemat, Mexico City 07300, DF, MexicoXicotencatl, MA, Max Planck Inst Math, POB 7280, D-53072 Bonn, Germany TI - Product decomposition of loop spaces of configuration spaces AB - The configuration space of k points in RPn, CPn and HPn are studied. In this article we show that after looping once, they split as a product of spheres and the loop space of certain orbit configuration spaces. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000176081400004 L2 - loop spaces of configuration spaces;orbit configuration spaces SO - Topology and Its Applications 2002 ;121(1-2):33-38 7165 UI - 12035 AU - Xu Q AU - Cheng D AU - Trapaga G AU - Yang N AU - Lavernia EJ AD - Univ Calif Irvine, Dept Chem & Biochem Engn & Mat Sci, Irvine, CA 92697, USACINVESTAV, IPN, Lab Invest Mat, Unidad Quertaro, Quertaro 76230, MexicoSandia Natl Labs, Organizat 8715, Livermore, CA 94550, USAXu, Q, Univ Calif Irvine, Dept Chem & Biochem Engn & Mat Sci, Irvine, CA 92697 USA TI - Numerical analyses of fluid dynamics of an atomization configuration AB - Computational fluid dynamic techniques were used to analyze the gas flow behavior of a typical atomization configuration. The calculated results are summarized as follows. The atomization gas flow at the atomizer's exit may be either subsonic at ambient pressure or sonic at an underexpanded condition, depending on the magnitude of the inlet gas pressure. When the atomization gas separates to become a free annular gas jet, a closed recirculating vortex region is formed between the liquid delivery tube and the annular jet's inner boundary. Upon entering the atomization chamber, an underexpanded sonic gas flow is further accelerated to supersonic velocity during expansion. This pressure adjustment establishes itself in repetitive expansion and compression waves. A certain protrusion of the liquid delivery tube is crucial to obtain a stable subatmospheric pressure region at its exit. The vortex flow under the liquid delivery tube tends to transport liquid metal to the high kinetic energy gas located outside the liquid delivery tube, thereby leading to an efficient atomization MH - USA MH - Mexico|Queretaro PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000173190800024 L2 - ULTRASONIC GAS ATOMIZATION; METAL DELIVERY TUBE; FLOW; GEOMETRY SO - Journal of Materials Research 2002 ;17(1):156-166 7166 UI - 11028 AU - Yanagisawa K AU - Matamoros-Veloza Z AU - Rendon-Angeles JC AU - Lopez-Cuevas J AD - Kochi Univ, Fac Sci, Res Lab Hydrothermal Chem, Kochi 7808520, JapanFac Met Mecan, Inst Technol Saltillo, Saltillo 25280, Coahuila, MexicoIPN, Ctr Invest & Estudios Avanzados, Saltillo 25000, Coahuila, MexicoYanagisawa, K, Kochi Univ, Fac Sci, Res Lab Hydrothermal Chem, Kochi 7808520, Japan TI - Novel route for recycling of steelmaking slag by means of the hydrothermal hot-pressing method MH - Japan MH - Mexico|Coahuila PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000175924500005 L2 - WASTES SO - Journal of Materials Science Letters 2002 ;21(9):693-695 7167 UI - 11158 AU - Yang CH AU - Gavilanes-Ruiz M AU - Okinaka Y AU - Vedel R AU - Berthuy I AU - Boccara M AU - Chen JWT AU - Perna NT AU - Keen NT AD - Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521, USAUniv Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Coyoacan 04510, DF, MexicoUniv Paris 06, UMR 217, INRA, Lab Pathol Vegetale,INAP, F-75005 Paris, FranceUniv Wisconsin, Dept Anim Hlth & Biomed Sci, Madison, WI 53706, USAKeen, NT, Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521 USA TI - hrp genes of Erwinia chrysanthemi 3937 are important virulence factors AB - We developed improved virulence assays for Erwinia chrysanthemi 3937 on African violet varieties and devised a new method for the construction of precise bacterial gene knockouts. These methods were tested by constructing mutations in genes suspected to be involved with plant interactions. The virulence of the hrpG and hrcC mutant strains (both gene products presumed to be involved in protein secretion) was greatly reduced on leaves of semitolerant African violet varieties. An hrpN mutant strain produced delayed symptoms on African violet leaves and an hrpN Deltapel (Deltapel = five major pectate lyase genes deleted) double mutant was nonpathogenic. The hrcC and hrpG mutants did not produce a rapid hypersensitive response (HR) in tobacco, unlike the wild-type bacterium, and the hrpN mutant gave a reduced HR. The results, therefore, establish the importance of hrp genes in the virulence of E. chrysanthemi and their ability to elicit HR on nonhosts. The data also suggest that other effector proteins secreted by the Hrp system are required for full virulence and HR elicitation MH - France MH - Mexico|Distrito Federal MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000175529100008 L2 - bacterial plant pathogens;barcode;cross-over;polymerase chain reaction;type III secretion pathway;PROTEIN SECRETION SYSTEMS; GRAM-NEGATIVE BACTERIA; SOFT-ROT PATHOGENESIS; PSEUDOMONAS-SYRINGAE; HYPERSENSITIVE RESPONSE; PATHOGENICITY FACTOR; ESCHERICHIA-COLI; PECTATE LYASES; PATHWAY; PLANTS SO - Molecular Plant-Microbe Interactions 2002 ;15(5):472-480 7168 UI - 9555 AU - Yao ZY AU - Kan FL AU - Wang ET AU - Wei GH AU - Chen WX AD - Beijing Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R ChinaInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoNW Sci & Technol Univ Forestry & Agri, Dept Res & Environm, Yangling, Peoples R ChinaChen, WX, Beijing Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R China TI - Characterization of rhizobia that nodulate legume species of the genus Lespedeza and description of Bradyrhizobium yuanmingense sp nov AB - Legume species belonging to the genus Lespedeza are annual or perennial herb or shrub plants that grow in the northern hemisphere. They are known for the formation of root nodules, but little information is available about their microsymbionts. In this study, 58 root-nodule isolates from Lespedeza spp., obtained from China and the USA, were characterized using numerical taxonomic analysis of phenotypic features, SDS-PAGE analysis of whole-cell proteins, DNA-DNA hybridization, 16S rRNA gene sequence analysis and cross-nodulation with selected legume species. From the results generated using these approaches, it was concluded that Lespedeza spp. were promiscuous hosts for rhizobia. Four main clusters of bacteria, which included 35 of the strains isolated from Lespedeza spp., were defined upon numerical taxonomic analysis; these groups corresponded to those determined from analyses of protein electrophoretic and DNA-DNA hybridization data. The four clusters were found to define strains belonging to one of four species, Sinorhizobium saheli, Bradyrhizobium japonicum, Bradyrhizobium elkanii or a novel species of the genus Bradyrhizobium. The strains of B. japonicum and B. elkanii were all from the USA soil samples, and their representative strains could not nodulate soybean. The seven strains found to represent the novel Bradyrhizobium sp. were from China. These were differentiated from recognized species of the genus Bradyrhizobium by all of the taxonomic methods used here; hence, it is proposed that the novel strains isolated from Lespedeza spp. represent a novel species of the genus Bradyrhikobium, Bradyrhizobium yuanmingense. The type strain of the novel species, CCBAU 10071(T) (= CFNEB 101(T)), formed ineffective nodules on Medicago sativa and Melilotus albus but did not nodulate soybean. The other 23 bacterial strains isolated from Lespedeza spp. were found to form single branches or small groups (two to three strains) that were related to Bradyrhizobium, Mesorhizobium, Rhizobium and Sinorhizobium spp. on the basis of numerical taxonomic analysis, indicating the possibility that other rhizobial species are also associated with Lespedeza spp MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 29 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000179838100044 L2 - Lespedeza;Bradyrhizobium;Sinorhizobium;diversity;phylogeny;ALLORHIZOBIUM-UNDICOLA; NUMERICAL TAXONOMY; DNA HYBRIDIZATION; ROOT-NODULES; BACTERIA; DIVERSITY; TIANSHANENSE; AESCHYNOMENE; STRAINS; CHINA SO - International Journal of Systematic and Evolutionary Microbiology 2002 ;52():2219-2230 7169 UI - 9649 AU - Yepez H AU - Hess PO AU - Misicu S AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, GermanyNatl Inst Nucl Phys, Bucharest, RomaniaYepez, H, UNAM, Inst Ciencias Nucl, Circuito Exterior,CU,AP 70-543, Mexico City 04510, DF, Mexico TI - Heavy nuclear molecules with 2 and 3 clusters AB - We review geometric models for long-lived nuclear molecules with three clusters. Problems arise when the center of masses are in a triangular configuration and inner structure of the clusters has to be introduced. Possible solutions come from algebraic models. Returning to a simpler model, we discuss the description of a two-cluster molecule with an algebraic Hamiltonian. The geometrical content of the model is discussed via the use of coherent states. The relation of the physical distance variable between the clusters and the parameter of the coherent state is given. The final potential is orientation dependent and can be adjusted to the potential as obtained in double folding calculations MH - Germany MH - Mexico|Distrito Federal MH - Romania PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000179714300003 L2 - nuclear structure;nuclear clusters;algebraic models;molecular potentials;INTERACTING-BOSON MODEL; TRINUCLEAR MOLECULES; ALGEBRAIC APPROACH; COLLECTIVE MODES; FISSION; SPECTRA; CF-252; CLUSTERIZATION; STATE; SPIN SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2002 ;16(1-4):19-26 7170 UI - 10143 AU - Yeshurun I AU - Guerrero-Naranjo JL AU - Quiroz-Mercado H AD - Univ Nacl Autonoma Mexico, Hosp Dr Luis Sanchez Bulnes, IAP, Assoc Para Evitar Cegueta Mexico, Coyoacan 04030, MexicoTel Aviv Univ, Sackler Fac Med, Tel Aviv, IsraelTel Aviv Univ, Edith Wolfson Med Ctr, Tel Aviv, IsraelQuiroz-Mercado, H, Univ Nacl Autonoma Mexico, Hosp Dr Luis Sanchez Bulnes, IAP, Assoc Para Evitar Cegueta Mexico, Vincente Garcia Torres 46, Coyoacan 04030, Mexico TI - Spontaneous closure of a large traumatic macular hole in a young patient AB - PURPOSE: To report the spontaneous resolution of a traumatic macular hole that was considerably larger than in previously reported cases. DESIGN: Observational case report METHODS: The clinical and angiographic data of the patient were reviewed. RESULTS: A traumatic 600 X 400 v macular hole was observed to spontaneously resolve 5 weeks after trauma in a 15-year-old patient. Visual acuity only slightly improved consequently (from counting fingers at 4 meters to 20/200). The clinical appearance of the fovea after macular hole resolution raised the suggestion that a postconcussion retinal necrosis was the mechanism be. hind the lesion formation in this case. CONCLUSIONS: Spontaneous resolution of a traumatic macular hole is an outcome not limited to small lesions. Larger macular holes may represent retinal tissue loss and consequently a less favorable visual prognosis. (C) 2002 by Elsevier Science Inc. All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000178446100015 SO - American Journal of Ophthalmology 2002 ;134(4):602-603 7171 UI - 11275 AU - Yi JG AU - Alvarez L AU - Horowitz R AD - Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoYi, JG, Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USA TI - Adaptive emergency braking control with underestimation of friction coefficient AB - In this paper, a control scheme for emergency braking maneuvers in automated highway systems (AHSs) and a new online identification scheme to determine the tire-road friction characteristics of the vehicle are presented. The proposed controller determines the required pressure in the master cylinder of the braking system to achieve maximum deceleration during braking, based on the estimation of the tire-road friction characteristics and the overall braking system gain, for the given set of parameter estimates. With persistence of excitation, the identified static map between the tire longitudinal slip and the tire-road friction coefficient is guaranteed to converge to the actual map. When there is no persistence of excitation, and under a proper choice of initial conditions and adaptation gains, the proposed scheme underestimates the maximum coefficient of friction and its corresponding slip, and allows a conservative calculation of the safety critical intervehicle spacing MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 13 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000175289000007 L2 - adaptive estimation;braking;friction;road vehicle control;vehicle;AUTOMATED HIGHWAY SYSTEMS; TIRE-ROAD FRICTION SO - Ieee Transactions on Control Systems Technology 2002 ;10(3):381-392 7172 UI - 10847 AU - Yodo T AU - Ando H AU - Nosei D AU - Harada Y AU - Tamura M AD - Osaka Inst Technol, Asahi Ku, Osaka 5358585, JapanInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Phys, Mexico City 07360, DF, MexicoYodo, T, Osaka Inst Technol, Asahi Ku, 5-16-1,Ohmiya, Osaka 5358585, Japan TI - Investigation of initial growth layers grown on Si(001) process for GaN heteroepitaxial and Si(111) substrates by ECR-assisted MBE AB - High luminescence efficiency zincblende-GaN (beta-GaN) crystal islands were preferentially grown on Si at initial growth process, particularly on non-pretreated (0 0 1)-oriented Si. The initial growth process was strongly influenced by substrate treatment before growth, namely substrate surface state. It was confirmed by a high-resolution cross-sectional transmission electron microscopy that both wurtzite- and beta-GaN crystal grains were epitaxially grown by mixing in the plane on a 2.5 nm-thick amorphous SiNX. interface layer, which was instantly formed within 10s during substrate nitridation or/and initial growth process. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000176512900039 L2 - interfaces;molecular beam epitaxy;nitrides;MOLECULAR-BEAM EPITAXY; ELECTRON-CYCLOTRON-RESONANCE; SILICON; IONS SO - Journal of Crystal Growth 2002 ;237():1104-1109 7173 UI - 11535 AU - yora-Talavera T AU - Chappell J AU - Lozoya-Gloria E AU - Loyola-Vargas VM AD - Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, MexicoUniv Kentucky, Dept Agron, Plant Physiol BIochem Mol Biol Program, Lexington, KY 40506, USAIPN, CINVESTAV, Unidad Irapuato, Dept Ingn Genet, Irapuato 36500, Gto, MexicoIPN, CINVESTAV, Dept Biotecnol & Bioingn, Mexico City 07360, DF, MexicoLoyola-Vargas, VM, Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Calle 43,130 Col Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Overexpression in Catharanthus roseus hairy roots of a truncated hamster 3-hydroxy-3-methylglutaryl-CoA reductase gene AB - Catharanthus roseus (L.) G. Don hairy roots harboring hamster 3-hydroxy3-metliylglutaryl-CoA reductase(HMGR) (EC 1.1.1.88) cDNA without membrane-binding domain were evaluated by quantifying the levels of sterols and some indol-alkaloids. Clone 236, with the highest hybridization signal, had the lowest soluble and microsomal HMGR activity and produced more ajmalicine and catharanthine than the control but had reduced campesterol concentration. Clone 19, with low hybridization signal, had high soluble HMGR activity and produced high levels of campesterol and five to seven times more serpentine than the control but a low level of ajmalicine and no accumulation of catharanthine. These results suggest a possible role for HMGR in indole alkaloid biosynthesis and a possible cosuppression of both the endogenous and foreign HMGR genes in clone 236 MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Mexico|Yucatan MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0273-2289 UR - ISI:000174626700006 L2 - alkaloids;Catharanthus roseus;hairy roots;3-hydroxy-3-methylglutaryl-CoA reductase;COENZYME-A REDUCTASE; CELL-SUSPENSION CULTURES; INDOLE ALKALOID PRODUCTION; ARABIDOPSIS-THALIANA; COA REDUCTASE; TRYPTOPHAN DECARBOXYLASE; ISOPRENOID BIOSYNTHESIS; ISOPENTENYL DIPHOSPHATE; PHYTOPHTHORA-INFESTANS; NUCLEOTIDE-SEQUENCE SO - Applied Biochemistry and Biotechnology 2002 ;97(2):135-145 7174 UI - 10150 AU - Yu ZR AU - Du JH AU - Guo SH AU - Zhang HY AU - Matsumoto Y AD - Nankai Univ, Inst Photoelect, Tianjin 300071, Peoples R ChinaInst Transportat Engn, Tianjin 300161, Peoples R ChinaNankai Univ, Sch Chem, Tianjin 300071, Peoples R ChinaIPN, CINVESTAV, SEES, Mexico City 07000, DF, MexicoYu, ZR, Nankai Univ, Inst Photoelect, Tianjin 300071, Peoples R China TI - CoS thin films prepared with modified chemical bath deposition AB - Cobalt sulfide (CoS) thin films were deposited on glass substrates using a modified chemical bath deposition with cobalt dichloride (CoCl2) and sodium sulfide (Na2S) aqueous solutions. Structure properties of the films were measured using X-ray diffraction and scanning electron microscopy in the as-deposited and annealed states. Band gaps were determined using optical absorption measurements and carrier transport properties using conductivity measurements. The result shows that thermal annealing promotes the growth of grains, decreases band gap, and enhances electrical conductivity. The conductivity activation energy measurements show that the Fermi level always stays at the middle of the band gap for both as-deposited and annealed states, indicating an intrinsic semiconductor that may be suitable for photovoltaic or photothermal applications. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000178198000026 L2 - cobalt sulfide;chemical bath deposition;X-ray diffraction;scanning electron microscopy SO - Thin Solid Films 2002 ;415(1-2):173-176 7175 UI - 11450 AU - Yushkevich A AU - Gordienko E AD - Univ N Carolina, Dept Math, Charlotte, NC 28223, USAUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoYushkevich, A, Univ N Carolina, Dept Math, Charlotte, NC 28223, USA TI - Average optimal switching of a Markov chain with a Borel state space AB - We extend results on average per unit time optimality criterion in a switching model from a countable state space to a Borel state space. In the model we consider, a controller selects an increasing sequence of stopping times with respect to a Markov chain, and gets rewards and pays costs at them in an alternating order. The rewards and costs depend on the state of the chain. We find the optimal average gain and construct an optimal strategy. The basic tool is a variational problem with two obstacles that appears also in Dynkin games MH - Mexico|Distrito Federal MH - USA PB - HEIDELBERG: PHYSICA-VERLAG GMBH & CO RP - NOT IN FILE U3 - TC 1 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 1432-2994 UR - ISI:000174815800009 L2 - Positive Harris recurrent chain;alternating rewards and costs;stopping times;average reward SO - Mathematical Methods of Operations Research 2002 ;55(1):143-159 7176 UI - 11423 AU - Yuste F AU - Ortiz B AU - Perez JI AU - Rodriguez-Hernandez A AU - Sanchez-Obregon R AU - Walls F AU - Ruano JLG AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Madrid, Dept Quim Organ, Madrid 28049, SpainYuste, F, Natl Autonomous Univ Mexico, Inst Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - (+/-)-3,3-diethoxycarbonyl-2-p-tolylsulfinylacrylonitrile as dienophile: relationship between the barrier for pyramidal inversion of vinyl sulfoxides and the electronic effects of the substituents at the double bond AB - The dienophilic behavior of (+/-)-3,3-diethoxycarbonyl-2-p-tolylsulfinylacrylonitrile (6) is reported and compared with that of trialkoxycarbonyl sulfinylethylene (3). The change of a CO2R group by a CN one increases both the reactivity and the stereoselectivity of the cycloaddition. It seems that the linear structure of the CN group increases the planarity of the system reinforcing its electron-withdrawing power and therefore improving its dienophilic behavior. Otherwise, the low configurational stability at room temperature of the sulfoxide 6, which is obtained as a racemic from its optically pure precursor, must also be a consequence of this strong electronic demand of the substituents which results in an unusually small energetic barrier for pyramidal inversion of the sulfinyl sulfur in compound 6 (DeltaG(double dagger)=16.3 kcal mol(-1) at T-c=25degreesC, determined by dynamic NMR spectroscopy). This is the first evidence of the existing relationship between racemization barrier of vinyl sulfoxides and the electron-withdrawing power of the groups joined to the double bond. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000174820500015 L2 - vinyl sulfoxides;Diels-Adler reactions;racemization;stereoelectronic effects;DIELS-ALDER REACTIONS; BENZYL METHYL (S)-2-(P-TOLYLSULFINYL)MALEATE; CHIRAL DIENOPHILE; ENANTIOSELECTIVE SYNTHESIS; EFFICIENT DIENOPHILE; ASYMMETRIC-SYNTHESIS; ORGANIC-SYNTHESIS; CYCLOPENTADIENE; ESTERS; ACIDS SO - Tetrahedron 2002 ;58(13):2613-2620 7177 UI - 9666 AU - Zaharik ML AU - Vallance BA AU - Puente JL AU - Gros P AU - Finlay BB AD - Univ British Columbia, Dept Biochem & Mol Biol, Vancouver, BC V6T 1Z3, CanadaUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62250, Morelos, MexicoMcGill Univ, Dept Biochem, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Ctr Study Host Resistance, Montreal, PQ H3G 1Y6, CanadaFinlay, BB, Univ British Columbia, Biotechnol Lab, Vancouver, BC V6T 1Z3, Canada TI - Host-pathogen interactions: Host resistance factor Nramp1 up-regulates the expression of Salmonella pathogenicity island-2 virulence genes AB - Nramp1 (Natural resistance-associated macrophage protein-1; also known as Sic11a1) is a host resistance gene that provides protection against several intracellular pathogens, including Salmonella enterica serovar Typhimurium. Little is known about the dynamic interplay that occurs between mammalian host resistance determinants such as Nramp1 and pathogens during infection. To explore these interactions, we examined the effect of Nramp1 on expression of Salmonella typhimurium (STM) virulence factors. We demonstrate that Salmonella pathogenicity island 2 (SP12) is essential for replication of STM in spleens of infected Nramp1(+/+) mice. Furthermore, the presence of Nramp1 in transfected cell lines and congenic knockout mice resulted in the up-regulation of STM SPI2-associated virulence genes critical for intramacrophage survival. This Nramp1-dependent up-regulation of SPI2 was mimicked in vitro by chelation of iron, demonstrating the iron-responsive nature of expression of STM SPI2-associated virulence genes. We propose that acquisition of SPI2 by S. enterica not only enabled this bacterium to become an effective intracellular pathogen but also allowed the bacterium to withstand the effects of macrophage defense mechanisms such as Nramp1 early in the evolution of its pathogenic character. These dynamic Nramp1-pathogen interactions may be essential for regulating the course of an infection. This study demonstrates the presence of a previously undescribed direct influence of a mammalian innate host resistance locus on a pathogen at the genetic level MH - Canada MH - Mexico|Morelos PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 31 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000179530000081 L2 - III SECRETION SYSTEM; NADPH PHAGOCYTE OXIDASE; NATURAL-RESISTANCE; MACROPHAGE PROTEIN-1; INTRACELLULAR INFECTIONS; ANTIMICROBIAL ACTIONS; IRON TRANSPORT; IN-VITRO; TYPHIMURIUM; IDENTIFICATION SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(24):15705-15710 7178 UI - 10404 AU - Zamanov R AU - Marziani P AU - Sulentic JW AU - Calvani M AU - Dultzin-Hacyan D AU - Bachev R AD - Osserv Astron Padova, Ist Nazl Astrofis, I-35122 Padua, ItalyUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoZamanov, R, Osserv Astron Padova, Ist Nazl Astrofis, Vicolo Osservatorio 5, I-35122 Padua, Italy TI - Kinematic linkage between the broad- and narrow-line-emitting gas in active galactic nuclei AB - We investigate the radial velocity difference between the [O III] lambdalambda4959, 5007 and H lines for a sample of approximate to200 low-redshift active galactic nuclei. We identify seven objects showing an [O III] lambda5007 blueshift relative to H with an amplitude larger than 250 km s(-1) ("blue outliers"). These line shifts are found in sources where the broad high-ionization lines (e.g., C IV lambda1549) also show a large systematic blueshift. Such blueshifts occur only in the population A region of the Eigenvector 1 parameter domain (that also contains narrow-line Seyfert 1 galaxies). We suggest that [O III] lambdalambda4959, 5007 blueshifts are also associated with the high-ionization outflow originating in these highly accreting sources. This is a direct kinematic linkage between narrow- and broad-line-emitting gas MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000177589200003 L2 - galaxies : active;quasars : emission lines;quasars : general;CORRELATION SPACE; SEYFERT-GALAXIES; EMISSION-LINES; H-I; REGION; QUASARS; EIGENVECTOR-1; PROFILES; SUPPORT; AGN SO - Astrophysical Journal 2002 ;576(1):L9-L13 7179 UI - 9988 AU - Zambrano E AU - Nathanielsz PW AU - McDonald TJ AD - Cornell Univ, Coll Vet Med, Dept Biomed Sci, Lab Pregnancy & Newborn Res, Ithaca, NY 14853, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, MexicoMcDonald, TJ, Cornell Univ, Coll Vet Med, Dept Biomed Sci, Lab Pregnancy & Newborn Res, Box 16, Ithaca, NY 14853 USA TI - Neonatal ovine adrenal cortical and medullary cell H+ responses to ACTH and prostaglandin E-2 AB - The microphysiometric technique was used to evaluate 1- and 3-day-old lamb adrenal gland H+ production in response to ACTH or PGE(2). ACTH stimulated cortical, but not medullary H+ production; maximal H+ by combined cortical and medullary cells was greater than by cortical cells alone (p<0.05). In contrast, the magnitude of the H+ response to PGE2 was greater with medullary than with cortical cells alone or with cortical and medullary cells combined (p<0.05). The H+ response to ACTH was greater in 3-day-old compared to 1-day-old lambs while the potency of PGE(2) was not different at the ages studied. We conclude that in neonatal sheep: (1) ACTH and PGE(2) are potentially important in adrenal regulation, and (2) paracrine communication appears to be functioning as has been shown for adults. Copyright (C) 2002 S. Karger AG, Basel MH - Mexico|Distrito Federal MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Article AV - English IS - 0006-3126 UR - ISI:000178861700006 L2 - paracrine;lamb;H plus secretion;CHROMAFFIN CELLS; CATECHOLAMINE RELEASE; BIOLOGICAL APPLICATIONS; ADRENOCORTICAL-CELLS; PARACRINE CONTROL; LIVING CELLS; FETAL SHEEP; PARTURITION; RECEPTORS; CORTEX SO - Biology of the Neonate 2002 ;82(4):243-249 7180 UI - 10656 AU - Zambrano E AU - Guzman C AU - Cravioto M AU - Nathanielsz PW AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, MexicoCornell Univ, Coll Vet Med, Lab Pregnancy & Newborn Res, Ithaca, NY 14853, USA TI - Effect of a low protein diet during pregnancy and lactation on sexual development of female rats MH - Mexico|Distrito Federal MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000176561900488 SO - Biology of Reproduction 2002 ;66():271-272 7181 UI - 9580 AU - Zamudio A AU - Duda Y AU - Medina-Noyola M AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoInst Condensed Matter Phys, UA-11 Lvov, UkraineUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoDuda, Y, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent L Cardenas 152, Mexico City 07730, DF, Mexico TI - Monte Carlo simulation of impurity effects on particle clustering in the supporting solvent AB - A Monte Carlo study of a binary mixture of extended spheres shows how the concentration and/or size of impurities in a solvent changes the continuum percolation behavior in the latter. Impurity particles promote solvent clustering (percolation) at small impurity concentration and obstruct it at high concentration. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000179790500008 L2 - clustering;percolation;conductivity;mixture;simulation;impurity;X-RAY-SCATTERING; ELECTRICAL-RESISTIVITY; REVERSE MICELLES; CONTINUUM MODELS; POLYMER BLENDS; PERCOLATION; MORPHOLOGY; COMPOSITES SO - Physics Letters A 2002 ;305(5):258-263 7182 UI - 11362 AU - Zapata-Perez O AU - Gold-Bouchot G AU - Ortega A AU - Lopez T AU - Albores A AD - CINVESTAV, Dept Recursos Mar, Merida 97310, Yucatan, VenezuelaCINVESTAV, Dept Genet & Biol Mol, Mexico City 14000, DF, MexicoUNAM, Inst Biotecnol, Dept Genet & Fisiol Mol, Mexico City, DF, MexicoCINVESTAV, Secc Externa Toxicol, Mexico City 14000, DF, MexicoGold-Bouchot, G, CINVESTAV, Dept Recursos Mar, Km 6 Antigua Carretera & Progreso,Apdo Postal 73, Merida 97310, Yucatan, Venezuela TI - Effect of pyrene on hepatic cytochrome P450 1A (CYP1A) expression in nile tilapia (Oreochromis niloticus) AB - The effect of pyrene on the regulation of the gene expression of cytochrome P4501A (CYP1A) was studied in tilapia (Oreochromis niloticus), a tropical fish of great ecological and economical importance. To evaluate CYP1A mRNA, tilapia CYP1A cDNA was cloned, sequenced, and compared with those CYP1A reported sequences in the GeneBank DNA database. The top seven matches corresponded to CYP1A from other teleosts. Hepatic CYP1A mRNA levels showed a significant increase at day I after pyrene injection (20 mg kg(-1) body weight [BW]), and this CYP1A mRNA levels did not return to basal levels for up to 5 days. The immunoblot analysis of CYP1A protein levels using polyclonal rabbit-anti-trout antibodies in the liver of pyrene-treated (20 mg kg(-1) BW) tilapias showed a 1.9-fold increase at day 3 after injection. Ethoxyresorufin-O-deethylase (EROD) activity increased 18-fold with respect to control fish at day 3 after injection, CYP1A protein and EROD activity remained increased for 5 days after a single pyrene IP administration. Similarly, the highest concentration of 1-hydroxypyrene (1-OH pyrene) in bile was observed in fish sacrificed at day 3 after injection. EROD activity and 1-OH pyrene concentration showed a statistically significant correlation (r = 0.85) according to the Spearman test, suggesting the participation of this cytochrome in the biotransformation of pyrene MH - Mexico|Distrito Federal MH - Venezuela PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0090-4341 UR - ISI:000175176200013 L2 - FLOUNDER PLATICHTHYS-FLESUS; TROUT ONCORHYNCHUS-MYKISS; BASS DICENTRARCHUS-LABRAX; KRAFT MILL EFFLUENT; RAINBOW-TROUT; BETA-NAPHTHOFLAVONE; BIOTRANSFORMATION ENZYMES; MESSENGER-RNA; FUNDULUS-HETEROCLITUS; BIOMARKER RESPONSES SO - Archives of Environmental Contamination and Toxicology 2002 ;42(4):477-485 7183 UI - 11669 AU - Zarain-Herzberg A AU - Rupp H AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mol Biol Lab, Mexico City 04510, DF, MexicoUniv Marburg, Dept Cardiol, Mol Cardiol Lab, D-3550 Marburg, GermanyZarain-Herzberg, A, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mol Biol Lab, Apartado Postal 70-159, Mexico City 04510, DF, Mexico TI - Therapeutic potential of CPT I inhibitors: cardiac gene, transcription as a target AB - Inhibitors of carnitine palmitoyl-transferase I (CPT I), the key enzyme for the transport of long-chain acyl-coenzyme A (acyl-CoA) compounds into mitochondria, have been developed as agents for treating diabetes mellitus Type 2. Findings that the CPT I inhibitor, etomoxir, has effects on overloaded heart muscle, which are associated with an improved function, were unexpected and can be attributed to selective changes in the dysregulated gene expression of hypertrophied cardiomyocytes. Also,, the first clinical trial with etomoxir in patients with heart failure showed that etomoxir improved the clinical status and several parameters of heart function. In view of the action of etomoxir on gene expression, putative molecular mechanisms involved in an increased expression of SERCA2, the Ca2+ pump of sarcoplasmic reticulum (SR) and alpha-myosin heavy chain (MHC) of failing overloaded heart muscle are described. The first 225 bp of human, rabbit, rat and mouse SERCA2 promoter sequence have high identity Various cis-regularory elements are also given for the promoter of the rat cardiac alpha-MHC gene. It is hypothesised that etomoxir increases glucose-phosphate intermediates resulting in activation of signalling pathway(s) mediated by phosphatases. Regarding the possible direct action of etomoxir on peroxisome proliferator activated receptor alpha (PPAR-alpha) activation, it could upregulate the expression of various enzymes that participate in beta-oxidation, thereby modulating some effects of CPT 1 inhibition. Any development of alternative drugs requires a better understanding of the signal pathways involved in the altered gene expression. In particular, signals need to be identified which are altered in overloaded hearts and can selectively be re-activated by etomoxir MH - Germany MH - Mexico|Distrito Federal PB - LONDON: ASHLEY PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 17 U4 - Pharmacology & Pharmacy U5 - J;Review AV - English IS - 1354-3784 UR - ISI:000174197500003 L2 - 2-tetradecylglycidic acid;carnitine palmitoyl-transferase;etomoxir;gene expression;heart failure;myosin;promoter;sarcoplasmic reticulum;SERCA;transcription factor;SARCOPLASMIC-RETICULUM CA2+-ATPASE; HEAVY-CHAIN GENE; CARNITINE PALMITOYL TRANSFERASE; MYOSIN ISOENZYME DISTRIBUTION; THYROID-HORMONE RECEPTOR; CONGESTIVE-HEART-FAILURE; OVERLOADED RAT-HEART; HYPERTROPHIC GROWTH; MYOCARDIAL-FUNCTION; MOLECULAR-CLONING SO - Expert Opinion on Investigational Drugs 2002 ;11(3):345-356 7184 UI - 11048 AU - Zarnbrano-Villa S AU - Rosales-Borjas D AU - Carrero JC AU - Ortiz-Ortiz L AD - Univ Guadalajara, Ctr Univ Ciencias Exactas & Ingn, Guadalajara 44430, Jalisco, MexicoHosp Univ Miguel Oraa, Guanare, Edo Portuguesa, VenezuelaUNAM, Dept Inmunol, Inst Invest Biomed, Mexico City, DF, MexicoOrtiz-Ortiz, L, Univ Guadalajara, Ctr Univ Ciencias Exactas & Ingn, Guadalajara 44430, Jalisco, Mexico TI - How protozoan parasites evade the immune response AB - Protozoan pathogens such as Plasmodium, Leishmania, Trypanosoma and Entamoeba are responsible for several of the most widespread and lethal human diseases. Their successful survival depends mainly on evading the host immune system by for example, penetrating and multiplying within cells, varying their surface antigens, eliminating their protein coat, and modulating the host immune response. Immunosuppression is sometimes caused directly by parasite products and sometimes involves antigenic mimicry, which often appears in association with parasitic diseases. However, one of the most sophisticated mechanisms of evasion is the selective activation of a subset of T helper cells MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Venezuela PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Parasitology U5 - J;Review AV - English IS - 1471-4922 UR - ISI:000175784600009 L2 - TUMOR-NECROSIS-FACTOR; TRYPANOSOMA-CRUZI INFECTION; COMPLEMENT-MEDIATED LYSIS; SURFACE PROTEASE GP63; ENTAMOEBA-HISTOLYTICA; LEISHMANIA-DONOVANI; LYMPHOPROLIFERATIVE RESPONSES; CIRCUMSPOROZOITE PROTEIN; MACROPHAGE ACTIVATION; FALCIPARUM-MALARIA SO - Trends in Parasitology 2002 ;18(6):272-278 7185 UI - 11746 AU - Zeidan O AU - Hartley DJ AU - Riedinger LL AU - Danchev M AU - Reviol W AU - Weintraub WD AU - Zhang JY AU - Galindo-Uribarri A AU - Gross CJ AU - Paul SD AU - Baktash C AU - Lipoglavsek M AU - Radford DC AU - Yu CH AU - Sarantites DG AU - Carpenter MP AU - Janssens RVF AU - Seweryniak D AU - Padilla E AD - Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAWashington Univ, Dept Chem, St Louis, MO 63130, USAArgonne Natl Lab, Div Phys, Argonne, IL 60439, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sofia, Fac Phys, BG-1164 Sofia, BulgariaZeidan, O, Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USA TI - Rotational structures in Nd-129 and signature splitting systematics of the vh(11/2) bands in A similar to 130 nuclei AB - High-spin states in Nd-129 were populated in the reaction Mo-92(Ca-40,2pn) with beam energies of 170 and 184 MeV in two separate experiments. Over 140 new transitions were placed in a level scheme that consists of four rotational structures, three of which have been observed for the first time. The bands were assigned configurations based on their B(M1)/B(E2) ratios (for the strongly coupled bands), aligned angular momentum, observed band crossings, and signature splitting. Evidence for of the observation of the deformation driving nui(13/2)[660]1/2 orbital is presented. Signature splitting trends in the nuh(11/2) bands of A similar to 130 nuclei are investigated within the framework of the cranked shell model. Comparisons are made with observations in the pih(11/2) bands near A similar to 160 MH - Bulgaria MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000173888100010 L2 - RARE-EARTH NUCLEI; RECOIL MASS-SPECTROMETER; ION-BEAM-FACILITY; LOW-LYING STATES; HIGH-SPIN STATES; EXCITATION-ENERGIES; QUADRUPOLE-MOMENTS; REGION; SPECTROSCOPY; DEFORMATIONS SO - Physical Review C 2002 ;65(2): 7186 UI - 9457 AU - Zenteno-Savin T AU - Clayton-Hernandez E AU - Elsner R AD - Ctr Invest Biol Noroeste, SC, La Paz 23000, Baja Calif Sur, MexicoUniv Alaska Fairbanks, Inst Marine Sci, Fairbanks, AK 99775, USAZenteno-Savin, T, Ctr Invest Biol Noroeste, SC, Mar Bermejo 195,Apartado Postal 128, La Paz 23000, Baja Calif Sur, Mexico TI - Diving seals: are they a model for coping with oxidative stress? AB - The diving lifestyle of seals depends upon cardiovascular adjustments that result in frequent vasoconstriction of numerous organs. With the first post-dive breath, reperfusion allows for eliminating accumulated carbon dioxide (CO2) and reloading oxygen (O-2) stores. Reintroduction of oxygenated blood raises the potential for production of reactive oxygen species (ROS) and the possibility that they may overwhelm the antioxidant defenses. This study addresses the question of possible adaptive responses that allow ringed seal (Phoca hispida) tissues to tolerate repeated cycles of ischemia and reperfusion, and thus protect them from oxidative insult. We obtained samples of ringed seal heart, muscle and kidney through the cooperation of native subsistence hunters at Barrow, Alaska. Samples were subjected to oxidative stress by addition of xanthine oxidase. Production of superoxide radical (O-2(.-)), lipid peroxidation (as determined by the presence of thiobarbituric acid reactive substances, TBARS) and antioxidant capacity (AOX) were quantified by spectrophotometric analysis. Similarly treated pig tissues were anticipated to be more susceptible to oxidative stress. Contrary to expectations, pig tissues revealed less O-2(.-) and TBARS compared with ringed seal tissues. These results show that ringed seal muscle, heart and kidney can be induced in vitro to generate ROS, and suggest that the living seal's protective defenses may depend upon O-2(.-) production, similar to the protective effect of experimental preconditioning, or on enhanced intermediate scavenging, as evidenced by the larger AOX found in ringed seal tissues. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism;Toxicology;Zoology U5 - J;Article AV - English IS - 1532-0456 UR - ISI:000180245100008 L2 - reactive oxygen species;ischemia;oxidative stress;pigs;seals;antioxidants;lipid peroxidation;diving;ANTIOXIDANT DEFENSES; OXYGEN RADICALS; VITAMIN-E; SKELETAL-MUSCLES; CONSCIOUS PIGS; ISCHEMIA; EXERCISE; HEART; REPERFUSION; MYOCARDIUM SO - Comparative Biochemistry and Physiology C-Toxicology & Pharmacology 2002 ;133(4):527-536 7187 UI - 10593 AU - Zenteno A AU - Champac VH AU - Figueras J AD - INAOE, Dept Elect Engn, Puebla 72000, MexicoUniv Politecn Catalunya, Dept Elect Engn, E-08028 Barcelona, SpainZenteno, A, INAOE, Dept Elect Engn, POB 51 & 216, Puebla 72000, Mexico TI - Signal X-Y zoning to detect inter-signal delay violations AB - A signal X-Y zoning method to explore the possibilities to test time critical digital signals is presented. X-Y operating zones are obtained using an X-Y detector circuitry. The method has been applied to test delay violations due to crosstalk using a simple floating gate differential weighted-adder-comparator circuit MH - Mexico|Puebla MH - Spain PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000177101000009 SO - Electronics Letters 2002 ;38(14):686-688 7188 UI - 11348 AU - Zern TL AU - Romero L AU - West KL AU - Fernandez ML AD - Univ Connecticut, Storrs, CT 06269, USAUniv Sonora, Sonora, MexicoUniv Connecticut, Storrs, CT, USA TI - Plantago ovata seeds lower plasma lipids by affecting bile acid and hepatic cholesterol metabolism MH - Mexico|Sonora MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000174593901460 SO - Faseb Journal 2002 ;16(5):A988-A988 7189 UI - 9516 AU - Zhang HQ AU - Yan YH AU - Wang YF AU - Li SP AD - Wuhan Univ Technol, Biomat & Engn Ctr, Wuhan 430070, Peoples R ChinaZhang, HQ, Technol Univ Mixteca, Inst Design, Huajuapan De Leon 69000, Oaxaca, Mexico TI - Thermal stability of hydroxyapatite whiskers prepared by homogenous precipitation MH - Mexico|Oaxaca MH - Peoples R China PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1438-1656 UR - ISI:000180096900009 L2 - MECHANICAL-PROPERTIES; CALCIUM; CERAMICS; COMPOSITES SO - Advanced Engineering Materials 2002 ;4(12):916-919 7190 UI - 12255 AU - Zhang JY AU - Li XM AU - Wang RRC AU - Cortes A AU - Rosas V AU - Mujeeb-Kazi A AD - USDA ARS, Forage & Range Res Lab, Logan, UT 84322, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoWang, RRC, USDA ARS, Forage & Range Res Lab, 695 N 1100 E, Logan, UT 84322 USA TI - Molecular cytogenetic characterization of E-b-genome chromosomes in Thinopyrum bessarabicum disomic addition lines of bread wheat AB - Thinopyrum bessarabicum (2n = 2x = 14, (EEb)-E-b = JJ) is recognized for its high tolerance to soil salinity and the scab disease caused by Fusarium graminearum. Seven Triticum aestivum/T. bessarabicum disomic addition lines (2n = 44 = 21 " ABD + 1 " E-b) developed at the International Maize and Wheat Improvement Center were assayed. Genomic in situ hybridization (GISH) showed that six of the seven were true disomic alien addition lines, whereas one was a duplication-translocation addition line in which four-fifths of the additional chromosome was an alien chromosome segment and one-fifth was a wheat chromosome segment. Using AFLP fragments amplified from 32 selective primer pairs, 389 fragments were assigned to T. bessarabicum chromosomes. The duplication-translocation addition line had no unique AFLP fragments but shared 25 fragments with the 7E(b) addition line, indicating that the translocation chromosome probably involved the 7E(b) rather than the 3E(b), as originally described. The presumed 6E(b) addition line was determined to have a pair of 4E(b) chromosomes. Thus, the 3E(b) and 6E(b) addition lines are missing. At present, there are 48 AFLP markers for 1E(b), 67 for 2E(b), 39 for 4E(b), 59 for 5E(b), and 54 for 7E(b). In addition, two RAPD markers for 1E(b), two for 2E(b), six for 4E(b), one for 5E(b), and three for 7E(b) were identified. Sixty-eight AFLP markers were present in the amphidiploid but absent in all tested disomic addition lines, making them putative markers for 3E(b) and/or 6E(b). Also, 50 AFLP and six RAPD markers occur in at least five E-b chromosomes. These molecular markers, when used in conjunction with GISH, will be useful in identifying the two missing E-b addition lines and in monitoring the introgression of E-b chromosomal segments into wheat MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 1058-5893 UR - ISI:000172542400016 L2 - marker;salt tolerance;scab resistance;translocation;wheatgrass;Thinopyrum bessarabicum;addition line;BARLEY HORDEUM-VULGARE; IN-SITU HYBRIDIZATION; REPRESENTATIONAL DIFFERENCE ANALYSIS; SALT-TOLERANCE; AFLP MARKERS; DNA MARKERS; ASSIGNMENT; TRITICEAE; GENES; RAPD SO - International Journal of Plant Sciences 2002 ;163(1):167-174 7191 UI - 9843 AU - Zhao YM AU - Pittel S AU - Bijker R AU - Frank A AU - Arima A AD - Univ Delaware, Bartol Res Inst, Newark, DE 19716, USASaitama Univ, Dept Phys, Urawa, Saitama 3380825, JapanSE Univ, Dept Phys, Nanjing 210018, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoHouse Councilors, Chiyoda Ku, Tokyo 1008962, JapanZhao, YM, Univ Delaware, Bartol Res Inst, Newark, DE 19716, USA TI - Generic rotation in a collective SD nucleon-pair subspace AB - The low-lying collective states involving many nucleons interacting by the two-body random ensemble (TBRE) interactions are investigated in a collective SD-pair subspace, with the collective pairs defined by the two-nucleon system. It is found that in this truncated pair subspace, collective vibrations arise naturally for a general TBRE Hamiltonian whereas collective rotations do not. A Hamiltonian restricted to include only a few randomly generated separable terms is able to produce collective rotational behavior, as long as it includes a reasonably strong quadrupole-quadrupole component. Similar results arise in the full shell model space. These results suggest that the structure of the Hamiltonian is key to producing generic collective rotation MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Peoples R China MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000179103500001 L2 - 2-BODY RANDOM ENSEMBLES; INTERACTING BOSON MODEL; MANY-BODY SYSTEMS; RANDOM POLYNOMIALS; SHELL-MODEL; ORDERLY SPECTRA; GROUND-STATES; FORMALISM; LIMIT SO - Physical Review C 2002 ;66(4): 7192 UI - 10071 AU - Zharikov SV AU - Shibanov YA AU - Koptsevich AB AU - Kawai N AU - Urata Y AU - Komarova VN AU - Sokolov VV AU - Shibata S AU - Shibazaki N AD - AF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaUNAM, Observ Astron Nacl SPM, Inst Astron, Ensenada, Baja California, MexicoTokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, JapanRIKEN, Wako, Saitama 3510198, JapanRAS, Special Astrophys Observ, Nizhnii Arkhyz 357167, RussiaIsaac Newton Inst Chile, SAO Branch, St Petersburg, RussiaYamagata Univ, Dept Phys, Yamagata 9908560, JapanRikkyo Univ, Dept Phys, Tokyo 1718501, JapanShibanov, YA, AF Ioffe Phys Tech Inst, Politekhnicheskaya 26, St Petersburg 194021, Russia TI - Subaru optical observations of the old pulsar PSR B0950+08 AB - We report the B band optical observations of an old (tau similar to 17.5 Myr) radiopulsar PSR B0950+08 obtained with the Suprime-Cam at the Subaru telescope. We detected a faint object, B = 27(.)(m)07 +/- 0.16. Within our astrometrical accuracy it coincides with the radio position of the pulsar and with the object detected earlier by Pavlov et al. (1996) in UV with the HST/FOC/F130LP. The positional coincidence and spectral properties of the object suggest that it is the optical counterpart of PSR B0950+08. Its flux in the B band is two times higher than one would expect from the suggested earlier Rayleigh-Jeans interpretation of the only available HST observations in the adjacent F130LP band. Based on the B and F130LP photometry of the suggested counterpart and on the available X-ray data we argue in favour of nonthermal origin of the broad-band optical spectrum of PSR B0950+08, as it is observed for the optical emission of the younger, middle-aged pulsars PSR B0656+14 and Geminga. At the same time, the optical efficiency of PSR B0950+08, estimated from its spin-down power and the detected optical flux, is by several orders of magnitude higher than for these pulsars, and comparable with that for the much younger and more energetic Crab pulsar. We cannot exclude the presence of a compact, similar to1", faint pulsar nebula around PSR B0950+08, elongated perpendicular to the vector of its proper motion, unless it is not a projection of a faint extended object on the pulsar position MH - Japan MH - Mexico|Baja California MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000178575300024 L2 - pulsars : general;pulsars : individual : PSR B0950+08;stars : neutron;X-RAY-EMISSION; MAGELLANIC-CLOUD PULSAR; VELA PULSAR; PARALLAX OBSERVATIONS; ROSAT OBSERVATIONS; NEUTRON-STARS; PROPER MOTION; CRAB PULSAR; TELESCOPE; PHOTOMETRY SO - Astronomy & Astrophysics 2002 ;394(2):633-639 7193 UI - 10201 AU - Zheng P AU - Wetzel C AU - Ammar K AU - Girard AMM AU - Rodermel S AU - Thomas DR AU - Ning L AU - Callis JB AU - Edwards GE AU - Daley L AD - Oregon State Univ, Dept Hort, Corvallis, OR 97331, USASmith Coll, Northampton, MA 01063, USACIMMYT Int, Hybrid Wheat Program, Mexico City 06600, DF, MexicoOregon State Univ, Ctr Gene Res & Biotechnol, Corvallis, OR 97331, USAIowa State Univ, Dept Bot, Ames, IA, USAOregon State Univ, Dept Stat, Corvallis, OR 97331, USAChrontel, San Jose, CA, USAUniv Washington, Dept Chem, Seattle, WA 98195, USAWashington State Univ, Dept Bot, Pullman, WA 99164, USAZheng, P, Oregon State Univ, Dept Hort, Corvallis, OR 97331, USA TI - Test of an in vivo method to detect chloroplast division in crop plants - Part II: Verification of the phenomenon by germplasm methods and confocal microscopy MH - Mexico|Distrito Federal MH - USA PB - DULUTH: ADVANSTAR COMMUNICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Spectroscopy U5 - J;Article AV - English IS - 0887-6703 UR - ISI:000178117900001 L2 - ARABIDOPSIS SO - Spectroscopy 2002 ;17(9):14-+ 7194 UI - 11424 AU - Zheng P AU - Wettzel C AU - Ammar K AU - Girard AMM AU - Rodermel S AU - Thomas DR AU - Ning L AU - Callis JB AU - Edwards GE AU - Daley L AD - Oregon State Univ, Dept Hort, Corvallis, OR 97331, USAIowa State Univ, Dept Bot, Ames, IA, USACIMMYT Int, Hybrid Wheat Program, Mexico City 06600, DF, MexicoOregon State Univ, Ctr Gene Res & Biotechnol, Corvallis, OR 97331, USAOregon State Univ, Dept Stat, Corvallis, OR 97331, USAChrontel, San Jose, CA, USAUniv Washington, Dept Chem, Seattle, WA 98195, USAWashington State Univ, Dept Bot, Pullman, WA 99164, USAZheng, P, Oregon State Univ, Dept Hort, Corvallis, OR 97331, USA TI - Test of an in vivo method to detect chloroplast division in crop plants part I: Discovery of the phenomenon AB - This article describes a novel spectrofluorometric method that apparently allows for in vivo observation of division of chloroplast populations in leaves of Arabidopsis thaliana MH - Mexico|Distrito Federal MH - USA PB - DULUTH: ADVANSTAR COMMUNICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Spectroscopy U5 - J;Article AV - English IS - 0887-6703 UR - ISI:000174862700001 L2 - GROWN WHEAT LEAVES; ARABIDOPSIS-THALIANA; MESOPHYLL-CELLS; DNA-SYNTHESIS; FLUORESCENCE; LIGHT; TRANSFORMATION; REPLICATION; TEMPERATURE; APPARATUS SO - Spectroscopy 2002 ;17(4):16-+ 7195 UI - 11338 AU - Zhuang MB AU - Oltean DI AU - Gomez I AU - Pullikuth AK AU - Soberon M AU - Bravo A AU - Gill SS AD - Univ Calif Riverside, Environm Toxicol Grad Program, Riverside, CA 92521, USAUniv Calif Riverside, Dept Cell Biol & Neurosci, Riverside, CA 92521, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Microbiol, Cuernavaca 62250, Morelos, MexicoGill, SS, Univ Calif Riverside, Environm Toxicol Grad Program, 5429 Boyce Hall, Riverside, CA 92521 USA TI - Heliothis virescens and Manduca sexta lipid rafts are involved in Cry1A toxin binding to the midgut epithelium and subsequent pore formation AB - Lipid rafts are characterized by their insolubility in nonionic detergents such as Triton X-100 at 4 degreesC. They have been studied in mammals, where they play critical roles in protein sorting and signal transduction. To understand the potential role of lipid rafts in lepidopteran insects, we isolated and analyzed the protein and lipid components of these lipid raft microdomains from the midgut epithelial membrane of Heliothis virescens and Manduca sexta. Like their mammalian counterparts, H. virescens and M. sexta lipid rafts are enriched in cholesterol, sphingolipids, and glycosylphosphatidylinositol-anchored proteins. In H. virescens and M. sexta, pretreatment of membranes with the cholesterol-depleting reagent saponin and methyl-g-cyclodextrin differentially disrupted the formation of lipid rafts, indicating an important role for cholesterol in lepidopteran lipid rafts structure. We showed that several putative Bacillus thuringiensis Cry1A receptors, including the 120-and 170-kDa aminopeptidases from H. virescens and the 120-kDa aminopeptidase from M. sexta, were preferentially partitioned into lipid rafts. Additionally, the leucine aminopeptidase activity was enriched approximately 2-3-fold in these rafts compared with brush border membrane vesicles. We also demonstrated that Cry1A toxins were associated with lipid rafts, and that lipid raft integrity was essential for in vitro Cry1Ab pore forming activity. Our study strongly suggests that these microdomains might be involved in Cry1A toxin aggregation and pore formation MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 48 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000175096000069 L2 - GPI-ANCHORED PROTEINS; BACILLUS-THURINGIENSIS; MEMBRANE DOMAINS; TRITON X-100; CRYSTAL PROTEINS; AMINOPEPTIDASE-N; PLASMA-MEMBRANE; CRYIA(C) TOXIN; LARVAL MIDGUT; CHOLERA-TOXIN SO - Journal of Biological Chemistry 2002 ;277(16):13863-13872 7196 UI - 12090 AU - Zicovich-Wilson CM AU - Bert A AU - Roetti C AU - Dovesi R AU - Saunders VR AD - Univ Autonoma Estado Morelos, Dept Fis, Cuernavaca 62210, Morelos, MexicoUniv Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyUnita INFM Torino, Sez F, I-10125 Turin, ItalySERC, Daresbury Lab, CLRC, Warrington WA4 4AD, Cheshire, EnglandZicovich-Wilson, CM, Univ Autonoma Estado Morelos, Dept Fis, Av Univ 1001,C Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Characterization of the electronic structure of crystalline compounds through their localized Wannier functions AB - The crystalline orbitals of seven oxygen containing compounds with increasing degree of covalent character (MgO, MnO, ZnO, Al2O3, SiO2, AlPO4, and CaSO4) are localized according to a Wannier-Boys mixed scheme recently implemented. The resulting Wannier functions are analyzed in terms of various indices (centroids positions, second-order central moment tensor, its eigenvalues and principal axes, Mulliken population analysis, and atomic localization indices). Systematic trends are observed along the series. (C) 2002 American Institute of Physics MH - United Kingdom MH - Italy MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 22 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000172987100029 L2 - SPONTANEOUS POLARIZATION; ATOMIC CHARGES; X-RAY; CONSTANTS; PHASE; ZNO SO - Journal of Chemical Physics 2002 ;116(3):1120-1127 7197 UI - 9957 AU - Zobin VM AU - Luhr JF AU - Taran YA AU - Breton M AU - Cortes A AU - De La Cruz-Reyna S AU - Dominguez T AU - Galindo I AU - Gavilanes JC AU - Muniz JJ AU - Navarro C AU - Ramirez JJ AU - Reyes GA AU - Ursua M AU - Velasco J AU - Alatorre E AU - Santiago H AD - Univ Colima, Observ Vulcanol, Colima 28052, MexicoSmithsonian Inst, Dept Mineral Sci, Washington, DC 20560, USAUniv Colima, Ctr Univ Invest Ciencias Ambiente, Colima 28000, MexicoUniv Colima, Coordinac Gen Invest Cient, Colima 28040, MexicoConsejo Estatal Protecc Civil Colima, Colima 28010, MexicoNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoZobin, VM, Univ Colima, Observ Vulcanol, Av Gonzalo Sandoval 333,Col Las Viboras, Colima 28052, Mexico TI - Overview of the 1997-2000 activity of Volcan de Colima, Mexico AB - This overview of the 1997-2000 activity of Volcan de Colima is designed to serve as an introduction to the Special Issue and a summary of the detailed studies that follow. New andesitic block lava was first sighted from a helicopter on the morning of 20 November 1998, forming a rapidly growing dome in the summit crater. Numerous antecedents to the appearance of the dome were recognized, starting more than a year in advance, including: (1) pronounced increases in S/Cl and deltaD values at summit fumaroles in mid-1997; (2) five earthquake swarms between November-December 1997 and October-November 1998, with hypocenters that ranged down to 8 km beneath the summit and became shallower as the eruption approached; (3) steady inflation of the volcano reflected in shortening of geodetic survey line lengths beginning in November-December 1997 and continuing until the start of the eruption; (4) air-borne correlation spectrometer measurements Of SO2 that increased from the background values of < 30 tons/day recorded since 1995 to reach 400 tons/day on 30 October 1998 and 1600 tons/day on 18 November 1998; and (5) small ash emissions detected by satellite-borne sensors beginning on 22 November 1997. The seismic and other trends were the basis of a short-term forecast of an eruption, announced on 13 November 1998, with a forecast window of 16-18 November. Although the lava dome actually appeared on 20 November, this forecast is considered to have been a major success, and the first of its kind at Volcan de Colima. Based in part on this forecast, orderly evacuations of Yerbabuena, Juan Barragan, and other small proximal communities took place on 18 November. The lava dome grew rapidly (similar to4.4 m(3)/s) on 20 November, and was spilling over the SW rim of the crater by the morning of 21 November to feed block-and-ash flows (pyroclastic flows) ahead of an advancing lobe of andesitic block lava. The pyroclastic flows were initially generated at intervals of 3-5 min, reached speeds of 80-90 km/h, and extended out to 4.5 km from the crater. The block lava flow was already similar to150 m long by the afternoon of 21 November. It ultimately split into three lobes that flowed down the three branches of Barranca el Cordoban on the SSW flank of Volcan de Colima; the lava advanced atop previously emplaced pyroclastic-flow deposits from the same eruptive event, whose total volume is estimated as 24 X 10(5) m(3). The three lava lobes ultimately reached 2.8-3.8 km from the crater, had flow fronts similar to30 m high, and an estimated total volume of 39 X 106 in'. By early February 1999 the lava flows were no longer being fed from the summit crater, but the flow fronts continued their slow advance driven by gravitational draining of their partially molten interiors. The 1998-1999 andesites continued a compositional trend toward relatively higher SiO2 and lower MgO that began with the 1991 lava eruption, completing the reversal of an excursion to more mafic compositions (lower SiO2 and higher MgO) that occurred during 1976-1982. Accordingly, the 19981999 andesites show no signs of a transition toward the more mafic magmas that have characterized the major explosive eruptions of Volcan de Colima, such as those of 1818 and 1913. A large explosion on 10 February 1999 blasted a crater through the 1998-1999 lava dome and marked the beginning of a new explosive stage of activity at Volcan de Colima. Incandescent blocks showered the flanks out to 5 km distance, forming impact craters and triggering numerous forest fires. Similar large explosions occurred on 10 May and 17 July 1999, interspersed with numerous smaller explosions of white steam or darker ash-bearing steam. Intermittent minor explosive activity continued through the year 2000, and another large explosion took place on 22 February, 2001. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000178855900003 L2 - Volcan de Colima;Mexico;lava flows;pyroclastic flows;monitoring;eruption;DE-COLIMA; PLATE; ERUPTION SO - Journal of Volcanology and Geothermal Research 2002 ;117(1-2):1-19 7198 UI - 9046 AU - Zozulya VV AU - Men'shikov AV AD - Ctr Invest Cient Yucatan, Merida, MexicoNatl Acad Sci Ukraine, SP Timoshenko Inst Mech, Kiev, UkraineZozulya, VV, Ctr Invest Cient Yucatan, Merida, Mexico TI - Contact interaction of the faces of a penny-shaped crack under a normally incident shear wave AB - Consideration is given to the contact interaction of the faces of a penny-shaped crack in three-dimensional space under a normally incident harmonic shear wave. The problem is solved by the method of boundary integral equations. The dependence of the stress-intensity factor on the wave number is analyzed. The results obtained are compared with those neglecting the contact interaction MH - Mexico|Yucatan MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 1 U4 - Mechanics U5 - J;Article AV - English IS - 1063-7095 UR - ISI:000181264000007 L2 - FRACTURE-MECHANICS; ALLOWANCE SO - International Applied Mechanics 2002 ;38(9):1114-1118 7199 UI - 10059 AU - Zozulya VV AU - Men'shikova MV AD - Ctr Invest Cient Yucatan, Mexico City, DF, MexicoNatl Acad Sci Ukraine, SP Timoshenko Inst Mech, Kiev, UkraineZozulya, VV, Ctr Invest Cient Yucatan, Mexico City, DF, Mexico TI - Study of iterative algorithms for solution of dynamic contact problems for elastic cracked bodies AB - A plane problem is solved for the contact interaction between the faces of a rectilinear crack under the action of a normally incident harmonic tension-compression wave. Iterative algorithms are presented to solve the problem for both given initial distribution of contact forces and given initial discontinuity in the displacements of the crack faces. The convergence rates of the algorithms, the maximum contact forces, and displacement discontinuities are compared MH - Mexico|Distrito Federal MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 8 U4 - Mechanics U5 - J;Article AV - English IS - 1063-7095 UR - ISI:000178669500006 SO - International Applied Mechanics 2002 ;38(5):573-577 7200 UI - 10229 AU - Zozulya VV AU - Men'shikov AV AD - Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, Kiev, UkraineCtr Invest Cient Yucatan, Mexico City, DF, MexicoZozulya, VV, Ctr Invest Cient Yucatan, Mexico City, DF, Mexico TI - Contact interaction of the faces of a rectangular crack under normally incident tension-compression waves AB - A three-dimensional problem on the contact interaction between the faces of a rectangular crack under a normally incident harmonic tension-compression wave is considered. The problem is solved by using the method of boundary integral equations and an iterative algorithm. The contact forces and the discontinuity in the displacement of the crack faces are studied. The results obtained are compared with those for a finite plane crack MH - Mexico|Distrito Federal MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 4 U4 - Mechanics U5 - J;Article AV - English IS - 1063-7095 UR - ISI:000178093500003 L2 - HYPERSINGULAR INTEGRALS; FRACTURE-MECHANICS; ELASTICITY SO - International Applied Mechanics 2002 ;38(3):302-307 7201 UI - 9799 AU - Zuniga-Moreno A AU - Galicia-Luna LA AU - Horstmann S AU - Ihmels C AU - Fischer K AD - Inst Politecn Nacl, ESIQIE, Graduados Lab Termodinam, Mexico City 07738, DF, MexicoUniv Oldenburg, Lab Thermophys Properties GmbH, D-26111 Oldenburg, GermanyGalicia-Luna, LA, Inst Politecn Nacl, ESIQIE, Graduados Lab Termodinam, Edif Z,Secc 6,1er Piso,UPALM, Mexico City 07738, DF, Mexico TI - Compressed liquid densities and excess volumes for the binary systems carbon dioxide plus 1-propanol and carbon dioxide plus 2-propanol using a vibrating tube densimeter up to 25 MPa AB - The PupsilonT behavior was determined for the binary systems carbon dioxide + 1-propanol and carbon dioxide + 2-propanol in the homogeneous state. The measurements were performed for different compositions at temperatures ranging from 313 to 363 K and pressures up to 25 MPa using a vibrating tube densimeter. The accuracy of the density determinations was better than +/-0.05%, and the densities presented in this work agree well with data reported in the literature. The excess volumes were calculated from the experimental PupsilonT data MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000179368500019 L2 - 313.15 K; EQUILIBRIA; PRESSURES; MIXTURES SO - Journal of Chemical and Engineering Data 2002 ;47(6):1418-1424 7202 UI - 9993 AU - Zuniga AE AU - Beatty MF AD - Univ Nebraska, Dept Engn Mech, Lincoln, NE 68588, USAZuniga, AE, Inst Technol & Estudios Super Monterrey, Dept Ingn Mecan, E Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - A new phenomenological model for stress-softening in elastomers AB - A new phenomenological model for stress-softening of isotropic, incompressible hyperelastic rubberlike materials is presented. For any specified virgin material constitutive equation, the stress-softened material response due to microstructural damage is characterized by an exponential softening function that depends on the current magnitude of strain and its maximum previous value in a deformation of the virgin material. The theory is illustrated for a neo-Hookean material; and it is shown that results derived for two non-Gaussian molecular network material models compare most favorably with uniaxial extension data provided by others MH - Mexico|Nuevo Leon MH - USA PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 9 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0044-2275 UR - ISI:000178741200005 L2 - Mullins effect;stress-softening;damaged induced inelasticity;finite deformations;constitutive equations;elastomers;non-Gaussian network models;simple tension;UNIAXIAL EXTENSION; RUBBER; INFLATION SO - Zeitschrift fur Angewandte Mathematik und Physik 2002 ;53(5):794-814 7203 UI - 10139 AU - Zuniga G AU - Cisneros R AU - Hayes JL AU - ias-Samano J AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Zool, Lab Variac Biol & Evoluc, Mexico City 11340, DF, MexicoUS Forest Serv, USDA, Pacific NW Res Stn, Forestry & Range Sci Lab, La Grande, OR 97850, USAColegio Frontera Sur, Grp Ecol Quim Insectos, Tapachula, Chiapas, MexicoZuniga, G, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Zool, Lab Variac Biol & Evoluc, Prol Carpio & Plan Ayala S-N, Mexico City 11340, DF, Mexico TI - Karyology, geographic distribution, and origin of the genus Dendroctonus Erichson (Coleoptera : Scolytidae) AB - Several revisions of the taxonomy of the scolytid genus Dendroctonus have been reported during the last century. These have been based on the external morphology and biology of adults, karyology, and most recently molecular genetics. Using karyological data-chromosomal number and mechanism of sex determination-from 119 Dendroctonus populations representing 16 of the 19 species currently recognized, we determined rate of chromosomal evolution and evolutionary phases of this genus. The karyological formulae vary from 5 AA + neo-XY (2n=12) to 14 AA + Xyp (2n=30). The modal number of chromosomes is 2n=30, with a mean 2n value of 23.37 and coefficient of variation of 31.67%. These values indicate that Dendroctonus has a high rate of chromosomal diversity and that its evolutionary phase is of regression. Theoretically, the genus should be composed of specialist species with relatively low chromosomal numbers; however, this is not the case. We also used chromosomal evidence to examine the suspected Mexican origin for Dendroctonus. We posed two hypotheses to explain the karyological diversification and current distribution of Dendroctonus species. The first considered that diversification of the karyotype originated from species with 14 AA + Xyp during its dispersion southward with its hosts (Pinus spp.) in North America. The second assumed that karyological diversification of Dendroctonus occurred during the dispersion of the genus toward Eurasia and southward in North America and that the increases and decreases in number of chromosomes originated from an ancestral karyotype between 18 and 22 chromosomes. Evidence for each hypothesis is discussed MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Editorial Material AV - English IS - 0013-8746 UR - ISI:000178373200001 L2 - Dendroctonus;karyology;geographic origin;evolution;EVOLUTION; SPECIALIZATION; POPULATIONS; RATES SO - Annals of the Entomological Society of America 2002 ;95(3):267-275 7204 UI - 10361 AU - Zuniga G AU - Salinas-Moreno Y AU - Hayes JL AU - Gregoire JC AU - Cisneros R AD - Inst Politecn Nacl, Lab Variac Biol & Evol, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoUSDA, Forest Serv, Pacific NW Res Stn, Forestry & Range Sci Lab, La Grande, OR 97850, USAFree Univ Brussels, Anim & Cell Biol Lab, B-1050 Brussels, BelgiumZuniga, G, Inst Politecn Nacl, Lab Variac Biol & Evol, Escuela Nacl Ciencias Biol, Prolongac Carpio & Plan Ayala SN, Mexico City 11340, DF, Mexico TI - Chromosome number in Dendroctonus micans and karyological divergence within the genus Dendroctonus (Coleoptera : Scolytidae) AB - The meiotic formula of the European spruce beetle, Dendroctonus micans (Kugelann), is 10 AA + Xyp in males and 10 AA + XX in females. This karyotype is different from the morphologically similar Dendroctonus punctatus LeConte (14 AA + Xyp). which is consistent with the taxonomic validity of both species. The chromosome number found in D. micans, added to karyological data from other species of the genus Dendroctonus Erichson, suggest that the karyological diversification within this genus may have occurred in two directions: one toward more southerly latitudes in North America and the other toward Europe and Asia MH - Belgium MH - Mexico|Distrito Federal MH - USA PB - OTTAWA: ENTOMOL SOC CANADA RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0008-347X UR - ISI:000177799200005 L2 - PUNCTATUS; AMERICA; MEXICO SO - Canadian Entomologist 2002 ;134(4):503-510 7205 UI - 10183 AU - Zuniga JA AU - Barrera JF AU - Valle J AU - Williams T AD - El Colegio Frontera Sur, Chiapas 30700, MexicoUniv San Carlos, Guatemala City, GuatemalaZuniga, JA, El Colegio Frontera Sur, Apartado Postal 36, Chiapas 30700, Mexico TI - Estimating populations of Idiarthron subquadratum (Orthoptera : Tettigoniidae) using mark-recapture methods in coffee plantations in Chiapas, Mexico AB - Idiarthron subquadratum (Orthoptera: Tettigoniidae) is a sporadic pest of coffee in parts of Mesoamerica. Mark-recapture techniques were employed to determine the adult population size in coffee plantations in the municipality of Siltepec, Chiapas, Mexico, where the insect has caused crop losses of around 50% over the past decade. Eight experimental blocks 50 by 50 m were defined in an area of 2,500 m(2). A trap was designed consisting of a bamboo tube 30 cm in length and closed at one end. Trials indicated that insect trapping efficiency was not improved by the presence of baits. Traps placed above the ground in coffee bushes or as banana leaves placed on the side of an experimental gauze cage captured significantly more L subquadratum individuals than traps placed on the ground. Tests with different types of paint combinations for marking insects revealed that nitrocellulose paint was durable, water-resistant and nontoxic to L subquadratum. Mark-recapture experiments were performed at 48-h intervals over a 1-mo period. Concurrently, direct nocturnal observations of I. subquadratum individuals feeding on coffee leaves and berries were made on four occasions during the study period. The prevalence of I. subquadratum feeding damage was also quantified at three sample dates during the study. Jackson's negative and positive index, Fisher-Ford model, Lincoln-Petersen index, and Jolly-Seber's stochastic model gave statistically similar mean population estimates. All of these mark-recapture models were also statistically similar to estimates generated by direct nocturnal counts of insects observed feeding on coffee bushes. In contrast, Bailey's triple capture model gave a population estimate significantly lower than the other models. L subquadratum feeding damage to coffee berries was significantly greater in blocks interplanted with banana. We conclude that mark-recapture methods combined with analysis using the Lincoln-Petersen model are simpler and less time consuming than direct nocturnal observations and give quantitatively similar population estimates MH - Guatemala MH - Mexico|Chiapas PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000178326000013 L2 - Idiarthron subquadratum;population estimation;sampling;trapping;mark-recapture;coffee pest SO - Environmental Entomology 2002 ;31(3):515-522 7206 UI - 11334 AU - Zuno-Cruz FJ AU - Sanchez-Cabrera G AU - Rosales-Hoz MJ AU - Noth H AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoLMU Munchen, Dept Chem, D-81377 Munich, GermanyRosales-Hoz, MJ, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - The reaction of [H4Ru4(CO)(12)] with 1-penten-3-yne: dimerization and trimerization through the triple bonds AB - The clusters [Ru-4(mu-CO)(CO)(10)(mu(4)-eta(1):eta(2):eta(1)-C5H6)(2)] (1), [Ru-4(CO)(8)(mu(4)-eta(4):eta(1):eta(1):eta(1):eta(3)-C10H12)(mu(3)-eta( 3):eta(2):eta(1)-C5H6)] (2) and [Ru-4(CO)(10)(mu(4)-eta(4):eta(1):eta(1):eta(3):eta(1)-C15H16)] (3) have been prepared from the reaction of [H4Ru4(CO)(12)] with 1-penten-3-yne. This reaction is observed to proceed with dimerization and trimerization through the triple bonds. The products were characterized spectroscopically by H-1- and C-13-NMR. X-ray crystal structures of compounds I and 2 are also described. cc, 2002 Published by Elsevier Science B.V MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000175170600006 L2 - oligomerization;triple bonds;enynes;tetraruthenium clusters;CARBONYL CLUSTERS; CRYSTAL-STRUCTURE; ALKYNES; LIGANDS; COMPLEX SO - Journal of Organometallic Chemistry 2002 ;649(1-2):43-49 7207 UI - 11194 AU - Zuo FR AU - Kaminski N AU - Eugui E AU - Allard J AU - Yakhini Z AU - Ben-Dor A AU - Lollini L AU - Morris D AU - Kim Y AU - DeLustro B AU - Sheppard D AU - Pardo A AU - Selman M AU - Heller RA AD - Chaim Sheba Med Ctr, Inst Resp Med, IL-52621 Tel Hashomer, IsraelFunct Genomics, IL-52621 Tel Hashomer, IsraelRoche Biosci, Palo Alto, CA 94304, USAAgilent Technol, IL-32000 Haifa, IsraelUniv Calif San Francisco, Lung Biol Ctr, Inst Cardiovasc Res, San Francisco, CA 94143, USAUniv Calif San Francisco, Dept Med, San Francisco, CA 94143, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 14080, DF, MexicoInst Nacl Enfermedades Respiratorias, Mexico City 14080, DF, MexicoKaminski, N, Chaim Sheba Med Ctr, Inst Resp Med, IL-52621 Tel Hashomer, Israel TI - Gene expression analysis reveals matrilysin as a key regulator of pulmonary fibrosis in mice and humans AB - Pulmonary fibrosis is a progressive and largely untreatable group of disorders that affects up to 100,000 people on any given day in the United States. To elucidate the molecular mechanisms that lead to end-stage human pulmonary fibrosis we analyzed samples from patients with histologically proven pulmonary fibrosis (usual interstitial pneumonia) by using oligonucleotide microarrays. Gene expression patterns clearly distinguished normal from fibrotic lungs. Many of the genes that were significantly increased in fibrotic lungs encoded proteins associated with extracellular matrix formation and degradation and proteins expressed in smooth muscle, Using a combined set of scoring systems we determined that matrilysin (matrix metalloproteinase 7), a metalloprotease not previously associated with pulmonary fibrosis, was the most informative increased gene in our data set. Immunohistochemisry demonstrated increased expression of matrilysin protein in fibrotic lungs. Furthermore, matrilysin knockout mice were dramatically protected from pulmonary fibrosis in response to intratracheal bleomycin. Our results identify matrilysin as a mediator of pulmonary fibrosis and a potential therapeutic target. They also illustrate the power of global gene expression analysis of human tissue samples to identify molecular pathways involved in clinical disease MH - Israel MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 116 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000175377800098 L2 - usual interstitial pneumonia;microarray analysis;informative genes;bleomycin;matrix metalloproteases;EPITHELIAL-CELLS; MATRIX; ALPHA; PROFILES; PATHWAY; DEFENSE; REPAIR; MODEL; TNF SO - Proceedings of the National Academy of Sciences of the United States of America 2002 ;99(9):6292-6297 7208 UI - 9784 AU - Zurita-Sanchez JR AU - Sanchez AS AU - Halevi P AD - Inst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoWeizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, IsraelZurita-Sanchez, JR, Univ Rochester, Inst Opt, Rochester, NY 14627, USA TI - Dipole radiation in a one-dimensional photonic crystal. II. TM polarization AB - As in a recent paper [I. Alvarado-Rodriguez, P. Halevi, and Adan S. Sanchez, Phys. Rev. E 63, 056613 (2001); 65, 039901(E) (2002)], we study the power emitted by an oscillating dipole in a superlattice (SL) modeled by means of a periodic distribution of Dirac-delta functions (Dirac-comb SL). However, while in the aforementioned paper the radiation was restricted to the transverse electric (TE) polarization mode, here we focus our attention on the transverse magnetic (TM) mode. Employing the same methodology, again we find that the power spectra are dominated by slope discontinuities. These occur - if at all - at the band edges for on-axis propagation, depending on the dipole's position and orientation. The largest enhancement or inhibition is present for normalized frequencies such that (omegad/c)less than or similar to2pi; here, omega is the dipole frequency, c is the speed of light in vacuum, and d is the distance between the barriers. For substantial values of the grating strength considerable enhancement or suppression of the radiated power (in comparison to the free-space value) is obtained. We also find that the power emitted by a gas of randomly oriented dipoles exhibits slope discontinuities at all band edges for on-axis propagation. In comparison with the TE polarization case, the TM polarization exhibits several different qualitative features MH - Israel MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000179176300114 L2 - DENSITY-OF-STATES; DIELECTRIC SUPERLATTICE; MEDIA SO - Physical Review e 2002 ;66(4): 7209 UI - 11298 AU - Zurita A AU - Beckman JE AU - Rozas M AU - Ryder S AD - Isaac Newton Grp Telescopes, La Palma, SpainInst Astrofis Canarias, Tenerife 38200, SpainCSIC, Madrid, SpainUNAM, Observ Nacl S Pedro Martir, Ensenada, Baja California, MexicoAnglo Australian Observ, Epping, NSW 1710, AustraliaZurita, A, Isaac Newton Grp Telescopes, La Palma, Spain TI - The origin of the ionization of the diffuse ionized gas in spirals - II. Modelling the distribution of ionizing radiation in NGC 157 AB - In this paper we make a quantitative study of the hypothesis that the diffuse Halpha emitted from the discs of spiral galaxies owes its origin to the ionizing photons escaping from H II regions. The basis of the models is the assumption that a fraction of the Lyman continuum (Lyc) luminosity from the OB stars within each H II region escapes from the region, leaking into the diffuse gas. A basic input element of any such model is a position and luminosity catalogue in Halpha of the H II regions in the galaxy under examination, down to a low limiting luminosity, and we have previously produced a catalogue of this type for NGC 157. An initial family of models can then be generated in which the Lyc escaping from an H II region is parametrized in terms of the observed Halpha luminosity of the region and the escaping fluxes allowed through the diffuse disc gas. These models can then be refined using a measured map of Hi surface density to effect the down-conversion of the Lyc to Halpha. For NGC 157 an Hi map was available. Although its moderate angular resolution did limit the accuracy with which we could test our models, the predicted diffuse Halpha surface brightness distributions from our models were compared with the observed distributions showing that, in general terms, the hypothesis of density bounding for the H II regions allows us to predict well the spatial distribution of the diffuse ionized gas. In the model yielding the best fit to the data, the regions of lower luminosity lose a constant fraction of their ionizing flux to their surroundings, while for H II region luminosities above a specific transition value the ionizing escape fraction is a rising function of the Halpha luminosity MH - Australia MH - Mexico|Baja California MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000175269800005 L2 - galaxies : general;galaxies : individual : NGC 157;galaxies : ISM;galaxies : spiral;ISM : general;ISM : HII regions;GRAND-DESIGN GALAXIES; INTERSTELLAR-MEDIUM; 120 PARSECS; REGIONS; STARS; STATISTICS; HYDROGEN; DENSITY; SAMPLE; DECAY SO - Astronomy & Astrophysics 2002 ;386(3):801-815 7210 UI - 7239 AU - Aakeroy CB AU - Beatty AM AU - Desper J AU - O'Shea M AU - Valdes-Martinez J AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAMississippi State Univ, Dept Chem, Mississippi State, MS 39762, USAKansas State Univ, Dept Phys, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoAakeroy, CB, Kansas State Univ, Dept Chem, Manhattan, KS 66506, USA TI - Directed assembly of dinuclear and mononuclear copper(II)-carboxylates into infinite 1-D motifs using isonicotinamide as a high-yielding supramolecular reagent AB - Isonicotinamide has been employed as a supramolecular reagent in the synthesis of five Cu(II) complexes, tetrakis(mu-acetato-O,O')-bis(isonicotinamide-N) dicopper(II) acetonitrile; trans-diaquabis(2-fluorobenzoato-O)-bis(isonicotinamide-N) copper(II), bis{bis(mu(2)-acetato-O)-acetic acid-O-bis(isonicotinamide-N) copper(II)} bis(methanol), bis(acetato-O)-acetic acid-O-bis(isonicotinamide-N) copper(II) acetic acid, bis(2-fluorobenzoato-O)-2-fluorobenzoic acid-O- bis(isonicotinamide-N) copper(II). The crystal structure determination of these compounds demonstrate that an effective supramolecular reagent can be combined with very different (chemically and structurally) inorganic building blocks and still create a family of inorganic-organic hybrid materials that all display the same principal supramolecular motifs; infinite 1-D chains. This consistency (which can be equated with a high supramolecular synthetic 'yield') has been achieved in the presence of several potentially disruptive (in a structural sense) molecules, e.g. water, methanol, and acetic acid. This illustrates that flexible or unpredictable coordination chemistry does not, in itself, necessarily prevent supramolecular synthesis using a reliable supramolecular reagent, in this case the structurally bifunctional isonicotinamide ligand MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1477-9226 UR - ISI:000185960500021 L2 - MOLECULAR RECOGNITION; HYDROGEN-BONDS; COORDINATION POLYMERS; DIAMONDOID NETWORK; POROUS SOLIDS; CRYSTAL; CHEMISTRY; COMPLEXES; DESIGN; CRYSTALLIZATION SO - Dalton Transactions 2003 ;(20):3956-3962 7211 UI - 6551 AU - Abascal AJ AU - Sheinbaum J AU - Candela J AU - Ochoa J AU - Badan A AD - Ctr Invest Cient & Educ Super Ensenada, Dept Oceanog Fis, Ensenada, Baja California, MexicoAbascal, AJ, Univ Cantabria, Escuela Tecn Super Ingn Caminos Canales & Puertos, E-39005 Santander, Spain TI - Analysis of flow variability in the Yucatan Channel AB - The structure and variability of the velocity and temperature fields in Yucatan Channel are analyzed using data from an eight-mooring array deployed from August 1999 to June 2000. The area-averaged kinetic energy and transport fluctuations spectra show that the extrema of these quantities do not coincide, and that flow variability is dominated by highly energetic processes with weak transport contributions. Transport fluctuations peak in the 20-40 and 5-10 day period bands, but show no clear correlation with the local wind-stress forcing. Empirical orthogonal function (EOF) analysis of the along-channel velocity component shows that approximately 55% of the total velocity variance is retained in the first two EOFs, which depict tripolar (the center of the channel is out of phase with the sides) and dipolar structures. A multivariate complex EOF analysis of low-passed temperature and velocity components suggests the tripole-dipole structures are the components of irregular oscillations of the flow, related to the northwestward propagation of anticyclones and cyclones through the channel. The weak transport signal in these modes is consistent with the eddies being advected by the mean flow. In contrast to other western boundary current regions, the passage of eddies provides the predominant explanation for the variability in the Yucatan Channel. However, the processes controlling transport variability remain unclear MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000187859000004 L2 - Yucatan Channel;energy;transport;real and complex empirical orthogonal functions;GULF-OF-MEXICO; LOOP CURRENT; FLORIDA CURRENT; CARIBBEAN SEA; TRANSPORT; STRAIT; FREQUENCY; MOTION; OCEAN SO - Journal of Geophysical Research-Oceans 2003 ;108(C12): 7212 UI - 7065 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mauritz K AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Papageorgiou K AU - Parashar N AD - Joint Inst Nucl Res, Dubna, RussiaUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceCNRS, Accelerateur Lineaire Lab, IN2P3, Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoInst NIKHEF, FOM, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, NL-1012 WX Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Observation of diffractively produced W and Z bosons in (p)over-barp collisions at root s=1800 GeV AB - Using the DO detector, we have observed events produced in (p) over barp collisions that contain W or Z bosons in conjunction with very little energy deposition ("rapidity gaps") in large forward regions of the detector. The fraction of W boson events with a rapidity gap (a signature for diffraction) is 0.89 +/- (0.19)(0.17)% and the probability that the non-diffractive background fluctuated to yield the observed diffractive signal is 3 x 10(-14), corresponding to a significance of 7.5 sigma. The Z boson sample has a gap fraction of 1.44 +/- (0.61)(0.52)%, with a significance of 4.4 sigma. The diffractive events have very similar properties to the more common non-diffractive component. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000186350100005 L2 - FERMILAB TEVATRON; DIJET PRODUCTION; SCATTERING; HERA SO - Physics Letters B 2003 ;574(3-4):169-179 7213 UI - 8015 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nomerotski A AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaIndia Delhi Univ, Delhi, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for large extra dimensions in the Monojet+E-T channel with the DO detector AB - We present a search for large extra dimensions (ED) in p (p) over bar collisions at a center-of-mass energy of 1.8 TeV using data collected by the DO detector at the Fermilab Tevatron in 1994-1996. Data corresponding to 78.8+/-3.9 pb(-1) are examined for events with large missing transverse energy, one high-p(T) jet, and no isolated muons. There is no excess observed beyond expectation from the standard model, and we place lower limits on the fundamental Planck scale of 1.0 and 0.6 TeV for 2 and 7 ED, respectively MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000183801300008 L2 - PRODUCTION CROSS-SECTION; LARGE COMPACT DIMENSIONS; ROOT-S=1.8 TEV; P(P)OVER-BAR COLLISIONS; PARTON DISTRIBUTIONS; TRANSVERSE-MOMENTUM; CONSTRAINTS; MILLIMETER; SCATTERING SO - Physical Review Letters 2003 ;90(25): 7214 UI - 8771 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mishra CS AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mostafa M AU - da Motta H AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, Inst Nucl Sci, IN2P3, Grenoble, FranceCNRS, Accelerateur Lineaire Lab, IN2P3, F-91405 Orsay, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, CNRS, LPNHE, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAPetersburg Nucl Phys Inst, Gatchina, RussiaAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Multiple jet production at low transverse energies in p(p)over-bar collisions at root s=1.8 TeV AB - We present data on multiple production of jets with transverse energies near 20 GeV in p (p) over bar collisions at roots=1.8 TeV. QCD calculations in the parton-shower approximation of PYTHIA and HERWIG and the next-to-leading order approximation of JETRAD are compared to the data for one, two, three, and four jet inclusive production. Transverse energy spectra and multiple jet angular and summed transverse-energy distributions are adequately described by the shower approximation while next-to-leading order calculations describe the data poorly MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000182019700003 L2 - CROSS-SECTIONS; D0 DETECTOR; EVENTS SO - Physical Review D 2003 ;67(5): 7215 UI - 9077 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amidi E AU - Amos N AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Baarmand MM AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Balamurali V AU - Baldin B AU - Balm PW AU - Banerjee S AU - Bantly J AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Casilum Z AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chang SM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Christenson JH AU - Chung M AU - Claes D AU - Clark AR AU - Cobau WG AU - Cochran J AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cretsinger C AU - Cummings MAC AU - Cutts D AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Ducros Y AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fahland T AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fisyak Y AU - Flattum E AU - Fleuret F AU - Fortner M AU - Fox H AU - Frame KC AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gilmartin R AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Goss LT AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gupta A AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Hansen S AU - Hauptman JM AU - Hays C AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jones M AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Kim SK AU - Klima B AU - Knuteson B AU - Ko W AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kotwal AV AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Leggett C AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCEA, Serv Phys Particles, DAPNIA, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaSeoul Natl Univ, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Nucl Phys, Krakow, PolandMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAUniv Hawaii, Honolulu, HI 96822, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USAUniv Oklahoma, Langston, OK 73050, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Zurich, Zurich, SwitzerlandInst Nucl Phys, Krakow, PolandAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.8 TeV AB - Results are presented on a measurement of the t (t) over bar pair production cross section in p (p) over bar collisions at roots=1.8 TeV from nine independent decay channels. The data were collected by the D empty set experiment during the 1992-1996 run of the Fermilab Tevatron Collider. A total of 80 candidate events is observed with an expected background of 38.8+/-3.3 events. For a top quark mass of 172.1 GeV/c(2), the measured cross section is 5.69+/-1.21(stat)+/-1.04(syst) pb MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Poland MH - Russia MH - South Korea MH - Switzerland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Review AV - English IS - 0556-2821 UR - ISI:000180918100006 L2 - TOP-QUARK PRODUCTION; HEAVY-PARTICLE-PRODUCTION; W-BOSON MASS; = 1.8 TEV; HADRONIC COLLISIONS; QCD CORRECTIONS; (P)OVER-BAR-P COLLISIONS; PPBAR COLLISIONS; E+E ANNIHILATION; GLUON RADIATION SO - Physical Review D 2003 ;67(1): 7216 UI - 7871 AU - Abbeyquaye T AU - Riesgo-Escovar J AU - Raabe T AU - Thackeray JR AD - Clark Univ, Dept Biol, Worcester, MA 01610, USAUNAM, Inst Neurobiol, Queretaro 76230, MexicoUniv Wurzburg, Inst Med Radiat & Cell Res, D-97078 Wurzburg, GermanyThackeray, JR, Clark Univ, Dept Biol, 950 Main St, Worcester, MA 01610 USA TI - Evolution of Gab family adaptor proteins AB - The Gab/dos/Soc-1 proteins form a family of multi-adaptor/scaffolding proteins involved in receptor tyrosine kinase signaling. To further understanding of the Gab family and the Drosophila Dos protein in particular, we isolated a dos homolog from both Drosophila pseudoobscura and Drosophila virilis and compared their gene structures and protein sequences with the rest of the Gab family. The presence of two conserved introns confirmed that the dos and gab genes are orthologous, but the Caenorhabditis elegans soc-1 gene had no unambiguously conserved introns with either dos or gab. However, phylogenetic analysis suggests that soc-1 probably represents a divergent member of the Gab family. Apart from the PH domain, which is well conserved in all Gab family members, the proteins show a low level of sequence conservation. Two tyrosines that probably bind to the Src Homology 2 (SH2) domains of a tyrosine phosphatase in all Gab family members are conserved at the C-terminal end; two other potential SH2-binding sites in Dos were also identified, as well as several proline rich sequences that might bind to SH3 or EVH1 domains in other proteins. A major partner for mammalian Gab is phospholipase C-gamma (PLC-gamma); genetic and biochemical tests for a PLC-gamma-SH3::Dos interaction were negative, indicating that if Drosophila PLC-gamma binds to Dos, it must do so indirectly or through an SH2-phosphotyrosine interaction. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0378-1119 UR - ISI:000184250800005 L2 - dos;Soc-1;phosphotyrosine;Src homology 2 (SH2) interaction;SH3-proline rich domain interaction;conserved introns;PLECKSTRIN HOMOLOGY DOMAINS; RECEPTOR TYROSINE KINASES; PHOSPHOLIPASE C-GAMMA; PHOSPHOINOSITIDE BINDING; PHOSPHATASE CORKSCREW; PHOSPHORYLATION SITES; SIGNAL-TRANSDUCTION; EGF-RECEPTOR; DROSOPHILA; SEVENLESS SO - Gene 2003 ;311():43-50 7217 UI - 8564 AU - Abramowicz MA AU - Karas V AU - Kluzniak W AU - Lee WH AU - Rebusco P AD - Chalmers Univ, Dept Astrophys, S-41296 Gothenburg, SwedenSISSA, I-34014 Trieste, ItalyCharles Univ, Inst Astron, CZ-18000 Prague, Czech RepublicZielona Gora Univ, Inst Astron, PL-65265 Zielona Gora, PolandCESR, F-31028 Toulouse 4, FranceUNAM, Astron Inst, Mexico City 04510, DF, MexicoUniv Trieste, Dept Phys, I-34127 Trieste, ItalyAbramowicz, MA, Chalmers Univ, Dept Astrophys, S-41296 Gothenburg, Sweden TI - Non-linear resonance in nearly geodesic motion in low-mass X-ray binaries AB - We have explored the ideas that parametric resonance affects nearly geodesic motion around a black hole or a neutron star, and that it may be relevant to the high-frequency (twin) quasi-periodic oscillations that occur in some low-mass X-ray binaries. We have assumed the particles or fluid elements of an accretion disc to be subject to an isotropic perturbation having a hypothetical but rather general form. We find that the parametric resonance is indeed excited close to the radius where epicyclic frequencies of the radial and meridional oscillations are in a 2 : 3 ratio. The location and frequencies of the highest amplitude excitation vary with the strength of the perturbation. These results agree with actual frequency ratios of twin kHz QPOs that have been reported in some black hole candidates, and they may be consistent also with correlation of the twin peaks in Sco X-1 MH - Czech Republic MH - France MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Sweden PB - TOKYO: ASTRONOMICAL SOC JAPAN RP - NOT IN FILE U3 - TC 45 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6264 UR - ISI:000182614100014 L2 - accretion;general relativity;QPOs;X-rays : binaries;X-rays : individual;QUASI-PERIODIC OSCILLATIONS; ACCRETION DISKS; BLACK-HOLE; GRO J1655-40; DISKOSEISMOLOGY; VORTICES SO - Publications of the Astronomical Society of Japan 2003 ;55(2):467-471 7218 UI - 9106 AU - Acharya N AU - Sen M AU - Ramos E AD - Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556, USARamos, E, Ctr Invest Energia, Ap P 34, Temixco 62580, Morelos, Mexico TI - Periodicity and bifurcations in capillary tube boiling with a concentric heating wire AB - Nucleate boiling from a vertical glass capillary in a pool of water is investigated here. Electrical heating is provided with a wire passing concentrically through the center of the capillary, and a fast-response thermocouple at the lip of the capillary records the instants of bubble departure. Different lengths and diameters of capillaries are used in the experiments. The average frequency of bubbling is seen to increase with applied heat flux, the relation being linear in the initial stages. With the heat flux used as a bifurcation parameter, one-dimensional return maps of the time interval between successive bubble emission events are used to study the transitions from the periodic state. The first bifurcation from the periodic to a two-period state is observed to be due to lateral instability of the liquid film adhering to the capillary wall. Further bifurcations to period two and then to period three bubbling are also observed. Simplified analysis of the different phases of the boiling process yields solutions which show close agreement with the experimental data. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Thermodynamics;Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0017-9310 UR - ISI:000181113200010 L2 - DYNAMICS SO - International Journal of Heat and Mass Transfer 2003 ;46(8):1425-1442 7219 UI - 7068 AU - Acosta CR AU - Acosta M AU - Sosa V AU - Ares O AU - Brandt EH AD - Univ Autonama Yucatan, Fac Ingn, Merida 97000, MexicoUniv Autonoma Yucatan, Yucatan 97310, CP, MexicoUH, Lab Superconduct IMRE, Fac Fis, Havana 10400, CubaMax Planck Inst Met Res, D-70506 Stuttgart, GermanyAcosta, CR, Univ Autonama Yucatan, Fac Ingn, Calle 48 No 578 M 87 Privada Palmas, Merida 97000, Mexico TI - Comparative analysis of the complex susceptibility of YBCO films at different temperatures and magnetic fields AB - The complex ac susceptibility of YBCO films was measured as a function of temperature (32-83 K) and magnetic field amplitude (0-450 G), by using a screening method with two coils. In addition this ac susceptibility was computed by a first principle continuum method. Comparison of this theory with the experimental data yielded the activation energy, U-c (0), for flux creep. The activation energy values U-c (0) were 480 and 930 K for samples I and II respectively. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Germany MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000186282800011 L2 - phenomenological theories;magnetic properties;response to electromagnetic field;vortex lattice;flux pinning;flux creep;critical currents;CRITICAL-CURRENT-DENSITY; THIN SUPERCONDUCTORS; AC FIELD SO - Physica C-Superconductivity and Its Applications 2003 ;398(3-4):152-156 7220 UI - 7241 AU - Adachi JA AU - Ericsson CD AU - Jiang ZD AU - Dupont MW AU - Martinez-Sandoval F AU - Knirsch C AU - Dupont HL AD - Univ Texas, Sch Publ Hlth, Ctr Infect Dis, Houston, TX, USAUniv Texas, Sch Med, Houston, TX, USASt Lukes Episcopal Hosp, Houston, TX 77030, USABaylor Coll Med, Houston, TX 77030, USAPfizer Inc, New York, NY, USAUniv Autonoma Guadalajara, Guadalajara, Jalisco, MexicoDuPont, HL, 6720 Bertner Ave,MC 1-164, Houston, TX 77030, USA TI - Azithromycin found to be comparable to levofloxacin for the treatment of US travelers with acute diarrhea acquired in Mexico AB - Increased drug resistance among enteropathogens is an emergent problem in travelers' diarrhea. This randomized, double-blind trial was conducted in Guadalajara, Mexico, during the summers of 1999-2001 to compare azithromycin with levofloxacin for the treatment of travelers' diarrhea. A total of 217 US adults were randomized to receive a single oral dose of azithromycin (1000 mg; 108 persons) or levofloxacin (500 mg; 109 persons), with a follow-up period of 4 days. Three patients in each group dropped out of the study. The median time between initiation of therapy and passage of the last unformed stool (azithromycin group, 22.3 h; levofloxacin group, 21.5 h) and the number of unformed stools passed during the 4-day follow-up period (azithromycin group, 6.5; levofloxacin group, 5.5) were similar. Treatment failure occurred in 10 patients (9.5%) receiving azithromycin and 8 patients (7.5%) receiving levofloxacin. Possible minor, self-limiting adverse events occurred in 57 patients in each treatment group. Azithromycin was found to be a safe and effective alternative to levofloxacin for the treatment of acute travelers' diarrhea in US adult travelers to Mexico MH - Mexico|Jalisco MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 37 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000185916200003 L2 - RANDOMIZED TRIAL; ENTERIC PATHOGENS; INVITRO ACTIVITY; DOUBLE-BLIND; ESCHERICHIA-COLI; CIPROFLOXACIN; RESISTANCE; THERAPY; OFLOXACIN; THAILAND SO - Clinical Infectious Diseases 2003 ;37(9):1165-1171 7221 UI - 6714 AU - Adair PM AU - Pine CM AU - Burnside G AU - Nicoll AD AU - Gillett A AU - Anwar S AU - Broukal Z AU - Chestnutt IG AU - Declerck D AU - Feng XP AU - Ferro R AU - Freeman R AU - Gibbons D AU - Grant-Mills D AU - Gugushe T AU - Hunsrisakhun J AU - Irigoyen-Camacho M AU - Lo ECM AU - Moola MH AU - Naidoo S AU - Nyandindi U AU - Poulsen VJ AU - Ramos-Gomez F AU - Razanamihaja N AU - Shahid S AU - Skeie MS AU - Skur P AU - Splieth C AU - Teo CS AU - Whelton H AU - Young DW AD - So Gen Hosp, Glasgow G51 4TF, Lanark, ScotlandUniv Liverpool, Liverpool L69 3BX, Merseyside, EnglandUniv Leeds, Leeds, W Yorkshire, EnglandInst Dent Res, Prague, Czech RepublicUniv Wales Coll Cardiff, Cardiff, WalesCatholic Univ Louvain, B-3000 Louvain, BelgiumShanghai Med Univ 2, Shanghai, Peoples R ChinaCittadella Hosp, Padua, ItalyQueens Univ Belfast, Belfast, Antrim, North IrelandGKT Dent Inst, London, EnglandHoward Univ, Washington, DC, USAMed Univ S Africa, Pretoria, South AfricaPrince Songkhla Univ, Songkhla, ThailandUniv Autonoma Metropolitana, Mexico City, DF, MexicoUniv Hong Kong, Hong Kong, Peoples R ChinaUniv Western Cape, Cape Town, South AfricaUniv Stellenbosch, ZA-7505 Tygerberg, South AfricaMinist Hlth, Dar Es Salaam, TanzaniaUniv Copenhagen, Copenhagen, DenmarkUniv Calif San Francisco, San Francisco, CA 94143, USAUniv Majunga, Majunga, MadagascarBradford City Primary Care, Bradford, W Yorkshire, EnglandUniv Bergen, Bergen, NorwayTexas A&M Univ, Baylor Coll Dent, Dallas, TX, USAUniv Greifswald, Greifswald, GermanyNatl Univ Singapore, Singapore 0511, SingaporeUniv Dent Sch, Cork, IrelandWallasey & Birkenhead Primary Care Team, Birkenhead, Merseyside, England TI - Familial and cultural perceptions and beliefs of oral hygiene and dietary practices among ethnically and socio-economically diverse groups MH - Belgium MH - Czech Republic MH - Denmark MH - United Kingdom MH - Germany MH - Ireland MH - Italy MH - Madagascar MH - Mexico|Distrito Federal MH - Norway MH - Peoples R China MH - Singapore MH - South Africa MH - Tanzania MH - Thailand MH - USA PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Meeting Abstract AV - English IS - 0022-0345 UR - ISI:000202893600424 SO - Journal of Dental Research 2003 ;82():B66-B66 7222 UI - 6397 AU - Adams H AU - Najera BA AD - Univ Autonoma Neuvo Leon, Fac Ciencias Quim, Monterrey, NL, MexicoUniv Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, EnglandNajera, BA, Univ Autonoma Neuvo Leon, Fac Ciencias Quim, Monterrey, NL, Mexico TI - The interaction of Ag-I, Zn-II and Pb-II with a pyridinyl-derived N-5-macrocycle AB - The interaction of Ag-I, Zn-II and Pb-II with the macrocycle L-I containing an N-5-donor set has been investigated. The H-1 nuclear magnetic resonance spectra of the complexes showed broad peaks, suggesting a slow exchange of metal ions between complexed and uncomplexed sites. The I : I (metal: ligand) stoichiometry was confirmed by first atom bombardment mass spectrometry and elemental microanalysis, solvent molecules being included when suggested by the infrared spectra. The X-ray crystal structures of [AgL1]ClO4, [ZnL1](ClO4)(2) and [PbL1(NO3)(2)] have been determined. The metal atoms in complexes are endomacrocyclic with the silver atom and zinc atom in a pentacoordinate environment comprising the ligand N-5-donor set. The lead atom prefers seven coordination derived from the full donor set of the macrocycle and two oxygens from dinitrate anions MH - United Kingdom MH - Mexico|Nuevo Leon PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0095-8972 UR - ISI:000188356200004 L2 - lead(II);Schiff-base penta-azamacrocycle;zinc(II);silver(I);POLLUTANTS; FILM SO - Journal of Coordination Chemistry 2003 ;56(14):1215-1222 7223 UI - 7306 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Cao J AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Portheault B AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schorner-Sadenius T AU - Schroder V AU - Schultz-Coulon HC AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, DAPNIA, DSM, CEA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LPNHE, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement and QCD analysis of neutral and charged current cross sections at HERA AB - The inclusive e(+)p single and double differential cross sections for neutral and charged current processes axe measured with the H1 detector at HERA. The data were taken in 1999 and 2000 at a centre-of-mass energy of roots = 319 GeV and correspond to an integrated luminosity of 65.2 pb(-1). The cross sections are measured in the range of four-momentum transfer squared Q(2) between 100 and 30 000 GeV2 and Bjorken x between 0.0013 and 0.65. The neutral current analysis for the new e(+)p data and the earlier e-p data taken in 1998 and 1999 is extended to small energies of the scattered electron and therefore to higher values of inelasticity y, allowing a determination of the longitudinal structure function F-L at high Q(2) (110 - 700 GeV2). A new measurement of the structure function x (F) over tilde (3) is obtained using the new e(+)p and previously published e p neutral current cross section data at high Q(2). These data together with H1 low Q(2) precision data are further used to perform new next-to-leading order QCD analyses in the framework of the Standard Model to extract flavour separated parton distributions in the proton MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 68 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000185742000001 L2 - DEEP-INELASTIC SCATTERING; EP SCATTERING; PARTON DISTRIBUTIONS; PERTURBATION-THEORY; PROTON COLLISIONS; LOW X; CALORIMETER; PHYSICS; PROGRAM; Q(2) SO - European Physical Journal C 2003 ;30(1):1-32 7224 UI - 7435 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schorner-Sadenius T AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Antwerpen UIA, Antwerp, BelgiumInteruniv Inst High Energies ULB VUB, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCtr Etud Saclay, CEA, DSM, DAPNIA, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rech Zentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Measurement of inclusive jet cross sections in photoproduction at HERA AB - Inclusive jet cross sections are measured in photoproduction at HERA using the H1 detector. The data sample of e(+)p --> e(+) + jet + X events in the kinematic range of photon virtualities Q(2) less than or equal to 1GeV(2) and photon-proton centre-of-mass energies 95 less than or equal to W-gammap less than or equal to 285GeV represents an integrated luminosity of 24.1pb(-1). Jets are defined using the inclusive k(perpendicular to) algorithm. Single- and multi-differential cross sections are measured as functions of jet transverse energy E-T(jet) and pseudorapidity eta(jet) in the domain 5 less than or equal to E-T(jet) less than or equal to 75GeV and -1 less than or equal to eta(jet) less than or equal to 2.5. The cross sections are found to be in good agreement with next-to-leading order perturbative QCD calculations corrected for fragmentation and underlying event effects. The cross section differential in E-T(jet), which varies by six orders of magnitude over the measured range, is compared with similar distributions from p (p) over bar colliders at equal and higher energies MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000185350000004 L2 - PHYSICS EVENT GENERATION; ANTI-PROTON COLLIDER; GAMMA-P INTERACTIONS; CERN PBARP COLLIDER; LEADING ORDER QCD; LUND MONTE-CARLO; PARTON DISTRIBUTIONS; (P)OVER-BAR-P COLLISIONS; TRANSVERSE ENERGY; HADRON-COLLISIONS SO - European Physical Journal C 2003 ;29(4):497-513 7225 UI - 7627 AU - Adloff C AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Belousov A AU - Berger C AU - Berndt I AU - Bizot JC AU - Bohme J AU - Boudry V AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Droutskoi A AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Eisenhandler E AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formadnek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Hadig T AU - Haidt D AU - Hajduk L AU - Haller J AU - Haynes WJ AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Hengstmann S AU - Henschel H AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hurling S AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Kotelnikov SK AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kuhr T AU - Lamb D AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebailly E AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loginov A AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Mangano S AU - Maracek R AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nix O AU - Nowak G AU - Nozicka M AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitti S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schorner-Sadenius T AU - Schroder V AD - Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Antwerp, UIA, B-2020 Antwerp, BelgiumFree Univ Brussels, Interuniv Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, S-22100 Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, F-75252 Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, CH-8057 Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceBerg Univ Gesamthsch Wuppertal, Rech Zentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAdloff, C, Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany TI - Search for new physics in e +/- q contact interactions at HERA AB - Deep-inelastic e(+/-) p scattering at high squared momentum transfer Q(2) up to 30 000 GeV2 is used to search for eq contact interactions associated to scales far beyond the HERA centre of mass energy. The neutral current cross section measurements dsigma / dQ(2), corresponding to integrated luminosities of 16.4 pb(-1) of e(-) p data and 100.8 pb(-1) of e(+) p data, are well described by the Standard Model and are analysed to set constraints on new phenomena. For conventional contact interactions lower limits are set on compositeness scales A ranging between 1.6-5.5 TeV. Couplings and masses of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3-1.4 TeV. A search for low scale quantum gravity effects in models with large extra dimensions provides limits on the effective Planck scale of MS > 0.8 TeV. A form factor analysis yields a bound on the radius of light quarks of R-q < 1.0 10(-18) m. (C) 2003 Published by Elsevier B.V MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000184890800005 L2 - FERMION-PAIR PRODUCTION; CURRENT CROSS-SECTIONS; PARTON DISTRIBUTIONS; EXTRA DIMENSIONS; PROTON COLLISIONS; LEP ENERGIES; COMPOSITENESS; SCATTERING; QUARK; SUBSTRUCTURE SO - Physics Letters B 2003 ;568(1-2):35-47 7226 UI - 7456 AU - Afanasiev VL AU - Dodonov SN AU - Moiseev AV AU - Chavushyan V AU - Mujica R AU - Juarez Y AU - Gorshkov AG AU - Konnikova VK AU - Mingaliev MG AD - Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, RussiaNatl Inst Astrophys Opt & Elect, Puebla, MexicoMoscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, RussiaAfanasiev, VL, Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, Russia TI - Optical and radio studies of radio sources AB - We present the classification of optical identifications and radio spectra of six radio Sources from a complete (in flux density) sample in the declination range 10degrees to 12degrees30'(J2000.0). The observations were carried Out with the 6-m Special Astrophysical Observatory telescope (Russia) in the wavelength range 3600-10000 Angstrom, the 2.1-m GHAO telescope (Mexico) in the range 4200-9000 Angstrom, and the RATAN-600 radio telescope in the frequency range 0.97-21.7 GHz. Three of the six objects under Study are classified as quasars, one is a BL Lac object, one is an absorption-line radio galaxy, and one is an emission-line radio galaxy Five objects have flat radio spectra, and one object has a power-law radio spectrum. All of the radio sources identified as quasars or BL Lac objects show variable radio flux densities. The spectra of three objects were separated into extended and compact components. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000185517400003 L2 - active galactic nuclei;quasars and radio galaxies;spectra;COMPLETE SAMPLE; SPECTRA SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2003 ;29(9):579-586 7227 UI - 8348 AU - Afraimovich V AU - Zaslavsky GM AD - San Luis Potosi Univ IICO, San Luis Potosi 78240, MexicoNYU, Courant Inst Math Sci, New York, NY 10012, USANYU, Dept Phys, New York, NY 10003, USAAfraimovich, V, San Luis Potosi Univ IICO, Av Karakorum 1470, San Luis Potosi 78240, Mexico TI - Space-time complexity in Hamiltonian dynamics AB - New notions of the complexity function C(epsilon;t,s) and entropy function S(epsilon;t,s) are introduced to describe systems with nonzero or zero Lyapunov exponents or systems that exhibit strong intermittent behavior with "flights," trappings, weak mixing, etc. The important part of the new notions is the first appearance of epsilon-separation of initially close trajectories. The complexity function is similar to the propagator p(t(0),x(0);t,x) with a replacement of x by the natural lengths s of trajectories, and its introduction does not assume of the space-time independence in the process of evolution of the system. A special stress is done on the choice of variables and the replacement t-->eta=ln t, s-->xi=ln s makes it possible to consider time-algebraic and space-algebraic complexity and some mixed cases. It is shown that for typical cases the entropy function S(epsilon;xi,eta) possesses invariants (alpha,beta) that describe the fractal dimensions of the space-time structures of trajectories. The invariants (alpha,beta) can be linked to the transport properties of the system, from one side, and to the Riemann invariants for simple waves, from the other side. This analog provides a new meaning for the transport exponent mu that can be considered as the speed of a Riemann wave in the log-phase space of the log-space-time variables. Some other applications of new notions are considered and numerical examples are presented.(C) 2003 American Institute of Physics MH - Mexico|San Luis Potosi MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000183156700012 L2 - ANOMALOUS TRANSPORT; FRACTIONAL KINETICS; STRANGE ATTRACTORS; CHAOTIC DYNAMICS; SELF-SIMILARITY; ENTROPY; SYSTEMS; MAPS SO - Chaos 2003 ;13(2):519-532 7228 UI - 9302 AU - Afraimovich V AU - Chazottes JR AU - Saussol B AD - IICO UASLP, San Luis Potosi, MexicoEcole Polytech, CNRS, CPHT, F-91128 Palaiseau, FranceUniv Picardie, CNRS, LAMFA, F-80039 Amiens, FranceAfraimovich, V, IICO UASLP, A Obregon 64, San Luis Potosi, Mexico TI - Pointwise dimensions for Poincare recurrences associated with maps and special flows AB - We introduce pointwise dimensions and spectra associated with Poincare recurrences. These quantities are then calculated for any ergodic measure of positive entropy on a weakly specified subshift. We show that they satisfy a relation comparable to Young's formula for the Hausdorff dimension of measures invariant under surface diffeomorphisms. A key-result in establishing these formula is to prove that the Poincare recurrence for a 'typical' cylinder is asymptotically its length. Examples are provided which show that this is not true for some systems with zero entropy. Similar results are obtained for special flows and we get a formula relating spectra for measures of the base to the ones of the flow MH - France MH - Mexico|San Luis Potosi PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 12 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000180665700002 L2 - Poincare recurrences;pointwise dimensions;spectra for measures;special flows;MULTIFRACTAL ANALYSIS; HYPERBOLIC FLOWS; TIMES; SPECTRA; ENTROPY SO - Discrete and Continuous Dynamical Systems 2003 ;9(2):263-280 7229 UI - 8430 AU - Aguilar A AU - Covington AM AU - Hinojosa G AU - Phaneuf RA AU - Alvarez I AU - Cisneros C AU - Bozek JD AU - Dominguez I AU - Sant'Anna MM AU - Schlachter AS AU - Nahar SN AU - McLaughlin BM AD - Univ Nevada, Dept Phys, Reno, NV 89557, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAOhio State Univ, Dept Astron, Columbus, OH 43210, USAHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USAAguilar, A, Univ Nevada, Dept Phys, Reno, NV 89557, USA TI - Absolute photoionization cross section measurements of O II ions from 29.7 to 46.2 eV AB - Absolute photoionization cross sections have been measured for a mixture of ground-state and metastable O II (O+) ions at photon energies ranging from 29.9 to 46.0 eV (414.7 to 269.5 Angstrom). All measurements were performed by merging an O+ beam with synchrotron radiation from an undulator beam line at the Advanced Light Source (ALS). At a resolution of 17 meV, more than 70 spectral features have been resolved, most of them identified and characterized. These measurements are compared with two independent R-matrix calculations and the data in TOPbase. All three calculations agree within 25% on the direct photoionization cross section, and with the absolute measurements within 40%. Some differences are noted in the predicted resonance positions among the three close-coupling R-matrix calculations, the TOPbase data being the least accurate. The estimated total experimental uncertainty varies from 15% to 20%. Such measurements benchmark theoretical photoionization cross section calculations performed within the framework of the Opacity Project and the Iron Project MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000183010200010 L2 - atomic data;atomic processes;methods : laboratory;OSCILLATOR-STRENGTHS; ATOMIC DATA; K+ IONS; PHOTOIONISATION; ULTRAVIOLET; THRESHOLD; STATE; RECOMBINATION SO - Astrophysical Journal Supplement Series 2003 ;146(2):467-477 7230 UI - 9214 AU - Aguilar A AU - West JB AU - Phaneuf RA AU - Brooks RL AU - Folkmann F AU - Kjeldsen H AU - Bozek JD AU - Schlachter AS AU - Cisneros C AD - Univ Nevada, Dept Phys, Reno, NV 89557, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USACLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, EnglandUniv Guelph, Guelph Waterloo Phys Inst, Guelph, ON N1G 2W1, CanadaUniv Aarhus, Inst Phys & Astron, DK-8000 Aarhus C, DenmarkUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoAguilar, A, Univ Nevada, Dept Phys, MS220, Reno, NV 89557, USA TI - Photoionization of isoelectronic ions: Mg+ and Al2+ AB - High-resolution measurements of the photoionization cross sections of the Na-isoelectronic ions Mg+ and Al2+ are presented, to be compared with earlier measurements in which structure in the most prominent peaks was unresolved. These measurements have been normalized to the earlier ones in order to provide values of the oscillator strengths of the newly resolved peaks, and comparison is made with multiconfiguration Hartree-Fock calculations MH - Canada MH - Denmark MH - United Kingdom MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000180804600063 L2 - ABSOLUTE CROSS-SECTIONS SO - Physical Review A 2003 ;67(1): 7231 UI - 7518 AU - Aguilar JA AU - Camarena OM AU - Center TD AU - Bojorquez G AD - Inst Mexicano Technol Agua, Coordinac Technol Riego & Drenaje, Subcoodinac Operac & Mantenimiento Infraestruct H, Jiutepec 62550, Morelos, MexicoUSDA ARS, Invas Plant Res Lab, Ft Lauderdale, FL 33314, USAUniv Autonoma Sinaloa, Sinaloa, MexicoCenter, TD, Inst Mexicano Technol Agua, Coordinac Technol Riego & Drenaje, Subcoodinac Operac & Mantenimiento Infraestruct H, Paseo Cuauhnahuac 8532, Jiutepec 62550, Morelos, Mexico TI - Biological control of waterhyacinth in Sinaloa, Mexico with the weevils Neochetina eichhorniae and N-bruchi AB - Water hyacinth (Eichhornia crassipes (Mart.) Solms.) creates severe problems in the irrigation districts of Mexico, particularly in western Sinaloa. Therefore water hyacinth weevils (Neochetina eichhorniae Warner and N. bruchi Hustache), imported from the USA in 1993, were used to initiate a biological control program. Precautionary screening revealed that some were infected with a microsporidian so disease-free colonies were produced by eliminating infected breeding lines. To demonstrate effectiveness prior to open field releases, weevils were first released in cages at field sites. Weevil intensity increased to 6.3 weevils/plant after 320 days when the plants were all dead or dying. More than 8,600 N. bruchi and 14,500 N. eichhorniae were then released at various sites during January 1995 to August 1996. Water-hyacinth coverage declined at Batamote reservoir (134 ha) from 95% to <3% by 1997; at the 12-ha Hilda reservoir from 100% in May 1995 to 1% by March 1998; at the 42.3-ha Arroyo Prieto reservoir from 100% to 1% during the same interval; and at the Mariquita reservoir (492 ha), the largest reservoir in the Humaya system, from 394 ha (80%) to 98.4 ha (20%) MH - Mexico|Morelos MH - Mexico|Sinaloa MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 1386-6141 UR - ISI:000185303400008 L2 - aquatic weeds (Pontederiaceae);biological control;Curculionidae;invasive plants;Mexico;water hyacinth;EUROPEAN CORN-BORER SO - Biocontrol 2003 ;48(5):595-608 7232 UI - 8548 AU - Aguilar JA AU - Pearce JA AD - Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66450, NL, MexicoUniv Texas, Ctr Energy & Environm Resources, Austin, TX 78758, USAAguilar, JA, Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, AP 076 F,Cd Univ, San Nicolas De Los Garza 66450, NL, Mexico TI - Measurement of dielectric properties of alumina at high temperature while exposed to microwaves AB - Results are reported of experiments conducted on alumina in a waveguide in order to determine its dielectric properties, using a method based on the six port technique for determining permittivity at high power. The aim of the work was to measure the properties of a relatively large sample, while exposed to microwaves, as a function of temperature. Under these conditions, and especially in the case of large samples, the thermal profile affects overall properties. These aspects are important because these are the conditions that would be present in most microwave processes. Alumina is widely used in the refractory industry, and some published data are considered for comparison MH - Mexico|Nuevo Leon MH - USA PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0967-9782 UR - ISI:000182786600002 SO - British Ceramic Transactions 2003 ;102(2):52-56 7233 UI - 8014 AU - Aguilar LMA AU - De Almeida NG AU - Villas-Boas CJ AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Catolica Goias, Dept Matemat & Fis, BR-74605010 Goiania, BrazilUniv Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, BrazilAguilar, LMA, Ctr Invest Opt, AC Loma Bosque 115, Leon 37150, Gto, Mexico TI - Is there a lower bound energy in the harmonic oscillator interacting with a heat bath? AB - In this Letter we investigate the lower bound energy of the usual Hamiltonian employed in Quantum Optics to model the interaction between a harmonic oscillator and a reservoir without the rotating wave approximation. We show that this model has serious inconsistencies and then we discuss the origin of these inconsistencies. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000183923000003 L2 - decoherence;system-reservoir interactions;harmonic oscillator SO - Physics Letters A 2003 ;313(4):257-260 7234 UI - 7730 AU - Aguilar LT AU - Orlov Y AU - Acho L AD - Mexican Sci Res & Adv Studies Ctr Ensenada, Dept Elect & Telecommun, San Diego, CA 92143, USAIPN, CITEDI, Sci Res Technol Dept, Tijuana, BC, MexicoOrlov, Y, Mexican Sci Res & Adv Studies Ctr Ensenada, Dept Elect & Telecommun, POB 434944, San Diego, CA 92143 USA TI - Nonlinear H-infinity-control of nonsmooth time-varying systems with application to friction mechanical manipulators AB - Nonlinear H-infinity-controller synthesis is developed for nonsmooth time-varying systems via measurement feedback. A local H-infinity-controller is derived by means of a certain perturbation of the differential Riccati equations, appearing in solving the H-infinity-control problem for the linearized system, when these unperturbed equations have bounded positive semidefinite solutions. Stabilizability and detectability properties of the control system are thus ensured by the existence of the proper solutions of the unperturbed differential Riccati equations, and hence the proposed synthesis procedure obviates an extra (formidable in the nonlinear case) work on verification of these properties. Theoretical results are applied to a position tracking control problem and, particularly, a regulation problem for mechanical systems with friction. Performance issues of the nonlinear H-infinity-tracking controller are illustrated in a simulation study made for a two degrees-of-freedom robot manipulator. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000184655400003 L2 - nonlinear H-infinity-control;nonsmooth dynamic systems;tracking control synthesis;mechanical manipulator;friction;MEASUREMENT FEEDBACK; ROBOT MANIPULATORS; DISTURBANCE ATTENUATION; ROBUST-CONTROL; DESIGN SO - Automatica 2003 ;39(9):1531-1542 7235 UI - 9152 AU - Aguirre G AU - Somanathan R AU - Hellberg LH AU - Dwyer TJ AU - North R AD - San Diego State Univ, Dept Chem, San Diego, CA 92182, USAInst Tecnol Tijuana, Ctr Grad Invest, Mexico City 22000, DF, MexicoSomanathan, R, San Diego State Univ, Dept Chem, San Diego, CA 92182, USA TI - N-alkenyl amide rotational barriers by 2D EXSY NMR AB - The rotational barriers of some N-alkenylamides were measured by 2D exchange spectroscopy (2D EXSY) NMR techniques. It was found that the conjugated double bond lowers E,Z barriers by 2.6 kJ mol(-1). Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000180965000008 L2 - NMR;2D EXSY NMR;conformation;N-alkenylamides;E/Z rotation barriers;RECEPTOR KINASE INHIBITOR; ALKALOIDS; ERBSTATIN SO - Magnetic Resonance in Chemistry 2003 ;41(2):131-134 7236 UI - 7185 AU - Aguirre J AU - Irikura K AD - UNAM, Inst Ingn, Coyoacan 04510, DF, MexicoKyoto Univ, Disaster Prevent Res Inst, Uji 611, JapanAguirre, J, UNAM, Inst Ingn, Ciudad Univ,Apdo 70-472, Coyoacan 04510, DF, Mexico TI - Reliability of envelope inversion for the high-frequency radiation source process using strong motion data: Example of the 1995 Hyogoken Nanbu earthquake AB - This article presents an application of a procedure to invert the high-frequency radiation process at the source during the 1995 Hyogo-ken Nanbu earthquake using the envelopes of acceleration waveforms from 16 stations. The inversion uses genetic algorithms that compare observed ground motions with synthetic ones calculated using empirical Green's functions. Before the inversion, the reliability of the solutions for models with different grid sizes is checked. It is found that the resolution of the high-frequency radiation is strongly dependent on the number of reliable data and, for this case, it is shown that a coarse grid model with 60 parameters provides reliable results. With use of this model, the inversion of the high-frequency radiation distribution for the 1995 Hyogo-ken Nanbu earthquake was performed, and results showed four distinct zones of high-frequency radiation. The first zone is located in subfault 1 near a step-over from subfault 1 to the Nojima fault and the starting point of the rupture. The second zone is located in subfault 2 near the lower limit of the slip inverted from low-frequency data by many authors. The third and fourth zones are located in subfault 3, one of them coinciding with the bifurcation of the fault plane into two fault planes (Sekiguchi et al., 2000). It is concluded that the procedure applied in this article successfully inverts the high-frequency radiation distribution for the 1995 Hyogo-ken Nanbu earthquake. Resolution is restricted to the coarse grid model with 60 parameters because of the limited number of stations, according to the resolution test. The results of the resolution test done in this work can not be generalized; however, they show that it is Very important to check the resolution before doing this kind of inversion MH - Japan MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000186096000009 L2 - KEN-NANBU; ACCELERATION SEISMOGRAMS; KOBE EARTHQUAKE; GROUND MOTION; GEODETIC DATA; SOURCE MODEL; FAULT PLANE; NEAR-FIELD; WAVE-FORM; JAPAN SO - Bulletin of the Seismological Society of America 2003 ;93(5):2005-2016 7237 UI - 7560 AU - Aguirre O AU - Hui GY AU - von Gadow K AU - Jimenez J AD - Univ Autonoma Nuevo Leon, Fac Ciencias Forestales, Linares, NL, MexicoUniv Gottingen, Inst Waldinventur & Waldwachstum, D-37077 Gottingen, GermanyAguirre, O, Univ Autonoma Nuevo Leon, Fac Ciencias Forestales, Apartado Postal 41, Linares, NL, Mexico TI - An analysis of spatial forest structure using neighbourhood-based variables AB - The study presents an analysis of forest spatial structure and diversity in the Federal State of Durango where the majority of the forests consist of pure pine stands or pine mixed with oak. Natural forests of greater diversity and of high ecological significance are found only in a few isolated localities in the Santa Barbara valley. These forests, with rare conifers including the genera Picea, Abies and Pseudotsuga are found on particular sheltered, humid sites. For one such rare site, a detailed analysis of forest spatial structure was made, based on three one-quarter hectare plots where all the trees and their coordinates had been assessed. The objective of the study was to provide a quantitative description of the spatial structure of the plots, using new parameters of spatial diversity and to present a method for comparative analysis of the three forest sites. The analysis is using a new approach for describing complex forest structures in a straightforward manner. To evaluate the spatial attributes, it is not necessary to measure distances between trees or to establish tree coordinates. The spatial characteristics can be established merely on the basis of evaluating the immediate neighbourhood of a given number of reference trees. The variables describe the distributions of spatial mingling, size differentiation and contagion, which can be easily interpreted allowing quantitative comparisons between complex forest structures. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000185170500009 L2 - mingling;contagion;diameter differentiation;distribution;forest density SO - Forest Ecology and Management 2003 ;183(1-3):137-145 7238 UI - 9043 AU - Airod A AU - Vandekinderen H AU - Barros J AU - Colas R AU - Houbaert Y AD - State Univ Ghent, Dept Met & Mat Sci, B-0952 Ghent, BelgiumCRM, B-9052 Ghent, BelgiumUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, Mexico City 66451, DF, MexicoAirod, A, State Univ Ghent, Dept Met & Mat Sci, Technol Pk 9, B-0952 Ghent, Belgium TI - Constitutive equations for the room temperature deformation of commercial purity aluminum AB - A series of compression tests were conducted using a servo-hydraulic, computer driven testing machine to deduce the constitutive equations that describe the behavior of commercial purity aluminum deformed at room temperature over a wide range of strain rates. The experimental samples were tested with and without the use of either mineral oil or polytetrafluoroethylene (PTFE) tape. All the tests were performed at constant strain rates up to an equivalent strain close to 1. The load-displacement curves were converted into stress-strain curves using different coefficients of friction. The constitutive equations deduced assuming that a steady state is achieved at large strains are considered to be good enough for using them to predict the strength of the material on a wide range of strains rind strain rates. The friction coefficient found to yield the best results was 0.05 for PTFE tape, 0.10 for mineral oil and 0.20 when no lubricant was used. (C) 2003 Elsevier Science B.V. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Industrial;Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0924-0136 UR - ISI:000181349300014 L2 - aluminum;constitutive equations;plastic deformation;steady state;friction coefficient;BEHAVIOR SO - Journal of Materials Processing Technology 2003 ;134(3):398-404 7239 UI - 8984 AU - ais-Pont G AU - Punn A AU - Flores-Maldonada C AU - Eckert J AU - Raposo G AU - Fleming TP AU - Cereijido M AU - Balda MS AU - Matter K AD - Univ Coll London, Div Cell Biol, Inst Ophthalmol, London EC1V 9EL, EnglandUniv Geneva, Dept Cell Biol, CH-1211 Geneva, SwitzerlandCtr Res & Adv Studies, Dept Physiol, Mexico City 07360, DF, MexicoUniv Southampton, Div Cell Sci, Sch Biol Sci, Southampton SO16 7PX, Hants, EnglandInst Curie, F-7505 Paris, FranceMatter, K, Univ Coll London, Div Cell Biol, Inst Ophthalmol, Bath St, London EC1V 9EL, England TI - Identification of a tight junction-associated guanine nucleotide exchange factor that activates Rho and regulates paracellular permeability AB - Rho family GTRases are important regulators of epithelial tight junctions (TJs); however, little is known about how the GTPases themselves are controlled during TJ assembly and function. We have identified and cloned a canine guanine nucleotide exchange factor (GEF) of the Dbl family of proto-oncogenes that activates Rho and associates with TJs. Based on sequence similarity searches and immunological and functional data, this protein is the canine homologue of human GEF-H1 and mouse Lfc, two previously identified Rho-specific exchange factors known to associate with microtubules in nonpolarized cells. in agreement with these observations, immunofluorescence of proliferating MDCK cells revealed that the endogenous canine GEF-H1/Lfc associates with mitotic spindles. Functional analysis based on overexpression and RNA interference in polarized MDCK cells revealed that this exchange factor for Rho regulates paracellular permeability of small hydrophilic tracers. Although overexpression resulted in increased size-selective paracellular permeability such cell lines exhibited a normal overall morphology and formed fully assembled TJs as determined by measuring transepithelial resistance and by immunofluorescence and freeze-fracture analysis. These data indicate that GEF-H1/Lfc is a component of TJs and functions in the regulation of epithelial permeability MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Switzerland PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 59 U4 - Cell Biology U5 - J;Article AV - English IS - 0021-9525 UR - ISI:000181449000010 L2 - epithelia;Dbl;intercellular adhesion;actin;microtubules;CELL-CELL ADHESION; TRANSEPITHELIAL ELECTRICAL-RESISTANCE; TRANS-EPITHELIAL PERMEABILITY; CANINE KIDNEY-CELLS; GTP-BINDING PROTEIN; ACTIN CYTOSKELETON; MDCK CELLS; BLASTOCYST FORMATION; ADHERENS JUNCTIONS; ALPHA-CATENIN SO - Journal of Cell Biology 2003 ;160(5):729-740 7240 UI - 6926 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kueckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Pitzl D AU - Poschl R AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt SS AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Spitzer H AU - Stamen R AU - Stella B AU - Stiewe J AU - Strauch I AU - Straumann U AU - Thompson G AU - Thompson PD AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Antwerp, UIA, B-2020 Antwerp, BelgiumULB, VUB, Inter Univ Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angewandte Phys, D-24098 Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LPNHE, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome 3, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceUniv Gesamthsch Wuppertal, Rechenzentrum, D-5600 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis, Merida, Yucatan, MexicoUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Multi-electron production at high transverse momenta in ep collisions at HERA AB - Multi-electron production is studied at high electron transverse momentum in positron- and electron-proton collisions using the H1 detector at HERA. The data correspond to an integrated luminosity of 115 pb(-1). Di-electron and tri-electron event yields are measured. Cross sections are derived in a restricted phase space region dominated by photon-photon collisions. In general good agreement is found with the Standard Model predictions. However, for electron pair invariant masses above 100 GeV, three di-electron events and three tri-electron events are observed, compared to Standard Model expectations of 0.30 +/- 0.04 and 0.23 +/- 0.04, respectively MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000186604400002 L2 - LIQUID ARGON CALORIMETER; CALIBRATION; SIMULATIONS SO - European Physical Journal C 2003 ;31(1):17-29 7241 UI - 7584 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson A AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann R AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keil R AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kueckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovika T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulong HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Antwerp, B-2020 Antwerp, BelgiumFree Univ Brussels, Interuniv Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, DAPNIA, DSM, CEA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Diffractive photoproduction of J/psi mesons with large momentum transfer at HERA AB - The diffractive photoproduction of J/psi mesons is measured with the HI detector at the ep collider HERA using an integrated luminosity of 78 pb(-1). The differential cross section dsigma(gammap --> J/psiY)/dt is studied in the range 2 < \t\ < 30 GeV2, where t is the square of the four-momentum transferred at the proton vertex. The cross section is also presented as a function of the photon-proton centre-of-mass energy W-gammap in three t intervals, spanning the range 50 < W-gammap < 200 GeV. A fast rise of the cross section with W-gammap is observed for each t range and the slope for the effective linear Pomeron trajectory is measured to be alpha' = -0.0135 +/- 0.0074(stat.) +/- 0.0051(syst.) GeV-2. The measurements are compared with perturbative QCD models based on BFKL and DGLAP evolution. The data are found to be compatible with s-channel helicity conservation. (C) 200 Published by Elsevier B.V MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000184973600003 L2 - VECTOR-MESONS; POMERANCHUK SINGULARITY; QUANTUM CHROMODYNAMICS; RAPIDITY GAPS; H1 DETECTOR; SCATTERING; PHYSICS; PROTON; JETS; CALORIMETER SO - Physics Letters B 2003 ;568(3-4):205-218 7242 UI - 6637 AU - Al-Ashaab A AU - Rodriguez K AU - Molina A AU - Cardenas M AU - Aca J AU - Saeed M AU - Abdalla H AD - Wolverhampton Univ, Sch Engn & Built Environm, Wolverhampton WV1 1SB, EnglandCSIM, DIA, Concurrent Engn Res Grp, Monterrey 64849, NL, MexicoChester Coll Higher Educ, Dept Comp Sci & Informat Syst, Chester CH1 4BJ, Cheshire, EnglandDe Montfort Univ, Dept Design Management & Commun, Leicester LE1 9BH, Leics, EnglandAl-Ashaab, A, Wolverhampton Univ, Sch Engn & Built Environm, Wulfruna St, Wolverhampton WV1 1SB, England TI - Internet-based collaborative design for an injection-moulding system AB - Nowadays, the globalization of the manufacturing enterprises requires collaboration across frontiers. In order to attain effective collaboration, the information about the product life cycle must be captured and administrated in a way that supports the decision taken during the product development. In this context, the manufacturing process information needs to be shared between manufacturers. This paper introduces the SPEED (Supporting Elastic enginEEring Development) system designed to facilitate the sharing of injection-moulding information between interested parties via the Internet. Both the architecture and the functionality of the SPEED system are presented and described in this paper through a case study. The evolving issues are addressed. Finally, closing remarks and conclusions of the system are presented MH - United Kingdom MH - Mexico|Nuevo Leon PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Interdisciplinary Applications;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 1063-293X UR - ISI:000187580500004 L2 - design for mouldability;manufacturing model;injection-moulding process information;collaborative product development;design for manufacturability over internet SO - Concurrent Engineering-Research and Applications 2003 ;11(4):289-299 7243 UI - 8176 AU - Alava M AU - Moukarzel CF AD - Helsinki Univ Technol, Phys Lab, FIN-02015 Espoo, FinlandNORDITA, DK-2100 Copenhagen, DenmarkCINVESTAV, Fis Aplicada, Merida 97310, Yucatan, MexicoAlava, M, Helsinki Univ Technol, Phys Lab, POB 1100, FIN-02015 Espoo, Finland TI - Transport on percolation clusters with power-law distributed bond strengths AB - The simplest transport problem, namely finding the maximum flow of current, or maxflow, is investigated on critical percolation clusters in two and three dimensions, using a combination of extremal statistics arguments and exact numerical computations, for power-law distributed bond strengths of the type P(sigma)similar tosigma(-alpha). Assuming that only cutting bonds determine the flow, the maxflow critical exponent v is found to be v(alpha)=(d-1)nu+1/(1-alpha). This prediction is confirmed with excellent accuracy using large-scale numerical simulation in two and three dimensions. However, in the region of anomalous bond capacity distributions (0less than or equal toalphaless than or equal to1) we demonstrate that, due to cluster-structure fluctuations, it is not the cutting bonds but the blobs that set the transport properties of the backbone. This "blob dominance" avoids a crossover to a regime where structural details, the distribution of the number of red or cutting bonds, would set the scaling. The restored scaling exponents, however, still follow the simplistic red bond estimate. This is argued to be due to the existence of a hierarchy of so-called minimum cut configurations, for which cutting bonds form the lowest level, and whose transport properties scale all in the same way. We point out the relevance of our findings to other scalar transport problems (i.e., conductivity) MH - Denmark MH - Finland MH - Mexico|Yucatan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000183482400010 L2 - CONTINUUM PERCOLATION; CRITICAL EXPONENTS; CONDUCTIVITY; THRESHOLD; SYSTEMS; NETWORKS; BEHAVIOR; UNIVERSALITY; PERMEABILITY; CONDUCTANCES SO - Physical Review e 2003 ;67(5): 7244 UI - 7338 AU - Albarran G AU - Bentley J AU - Schuler RH AD - Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSchuler, RH, Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USA TI - Substituent effects in the reaction of OH radicals with aromatics: Toluene AB - The relative rates for addition of .OH radical to toluene at its ortho, meta, and para sites have been shown to be in the ratios of 0.84:0.41:1. These ratios provide a quantitative basis for considering the effects of alkyl substiments in determining the site of .OH attack on other aromatics. Because .OH is a strong electrophile, the relative yields of .OH adducts provide a measure of the effect of the methyl group on the distribution of negative charge in toluene's aromatic system. Comparison of the partial rate constants observed for reaction at the different sites of toluene, biphenyl, and phenol with theoretical estimates of the distribution of charge in the valence shell indicates that factors other than charge also play some role MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000185609500014 L2 - (OH)-O-CENTER-DOT RADICALS; RADIOLYTIC OXIDATION; HYDROXYL RADICALS; RATE CONSTANTS; METAL-IONS; ATOMS; CHEMISTRY; BENZENE; PHENOL; ACID SO - Journal of Physical Chemistry A 2003 ;107(39):7770-7774 7245 UI - 8110 AU - Albarran G AU - Schuler RH AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Notre Dame, Radiat Lab, Notre Dame, IN 46556, USAAlbarran, G, UNAM, Inst Ciencias Nucl, Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Concerted effects in the reaction of (OH)-O-center dot radicals with aromatics: radiolytic oxidation of salicylic acid AB - Liquid chromatographic and capillary electrophoretic studies have been used to resolve the products produced in the radiolytic oxidation of salicylic acid in aqueous solution. These studies have shown that, as in the case of phenol, (OH)-O-. radicals preferentially add to the positions ortho and para to the OH substituent. However, in contrast to its reaction with phenol, addition at the ortho position is favored over addition at the para position. Because (OH)-O-. radical is a strong electrophile this difference suggests that the electron population at the ortho position in the salicylate anion is enhanced as a result of the hydrogen bonding in salicylic acid. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000183749200017 L2 - salicylic acid;hydroxyl radical;directing effects;oxidation of aromatics;capillary electrophoretic analysis;chromatographic analysis;OH; HYDROXYLATION; SUBSTITUTION; BENZENE; PHENOL SO - Radiation Physics and Chemistry 2003 ;67(3-4):279-285 7246 UI - 9082 AU - Albiter A AU - Salazar M AU - Bedolla E AU - Drew RAL AU - Perez R AD - Inst Mexicano Petr, Programa Investigac & Desarrollo Ductos, Mexico City 07730, DF, MexicoUMSNH, Inst Invest Met, Morelia 58000, Michoacan, MexicoMcGill Univ, Dept Met & Mat Engn, Montreal, PQ H3A 282, CanadaPerez, R, Inst Mexicano Petr, Programa Investigac & Desarrollo Ductos, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Improvement of the mechanical properties in a nanocrystalline NiAl intermetallic alloy with Fe, Ga and Mo additions AB - Microstructural and mechanical properties characterizations of nanocrystalline Ni-Al+M alloys were carried out. M represents the addition of transition elements such as Fe, Ga and Mo. Mechanical alloying (MA) and densification by hot-pressing techniques were used to produce and consolidate the alloys. The mechanical alloyed powders have a microstructure consisting of nanometer size particles. The main effect of these elements on the microstructure of the NiAl alloy is the refinement of the grain size since this process gives rise to crystallite sizes in the nanometric range. Also, the three minor additional elements form a solid solution with the intermetallic structure of the NiAl. Additions of Mo in the range of 2-6 at.% cause second phase formation of Mo2C. Mechanical properties (hardness, yield stress and strain) were obtained as a function of composition and sintering temperature. The highest hardness value is obtained for the NiAl+2Ga+6Mo (at.%) alloy and always corresponded to the highest densifications (98%) for the sintered samples at 1200 degreesC during 30 min. The Ni-Al alloys with different additions of elements lead to higher deformations than those reported previously. (C) 2002 Published by Elsevier Science B.V MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000181116400018 L2 - NiAl;mechanical alloying;nanocrystals;microalloying;ductility;strain;MATRIX COMPOSITES SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2003 ;347(1-2):154-164 7247 UI - 7465 AU - Alcala RE AU - Dominguez CA AD - Univ Nacl Autonoma Mexico, Dept Ecol & Evolut, Mexico City 04510, DF, MexicoUniv Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697, USAAlcala, RE, Univ Nacl Autonoma Mexico, Dept Ecol & Evolut, AP 70-275, Mexico City 04510, DF, Mexico TI - Patterns of prey capture and prey availability among populations of the carnivorous plant Pinguicula moranensis (Lentibulariaceae) along an environmental gradient AB - In this study we explored the effect of the physical environment and the availability of prey (biomass and taxonomic composition) on the patterns of prey capture and reproduction on five populations of Pinguicula moranensis (Lentibulariaceae) in areas ranging from pine-oak forests to desert scrublands. Environmental variation was summarized using principal factor analysis. Prey availability and prey capture increased toward the shadiest, most humid, and fertile population. The probability of reproduction and average bud production per population did not follow the same tendency because both fitness components peaked at the middle of the environmental gradient. These results suggest that the benefits derived from carnivory are maximized at sites fulfilling a trade-off between light, moisture, and prey availability. We also found that the taxonomic composition of both the available prey and that of the prey captured by plants varied among populations. The results also indicated that the prey captured by plants are not a random sample of prey available within populations. Overall, the results from this study revealed a marked amount of heterogeneity in the physical and biotic environment among the populations of P. moranensis, which has the potential to affect the outcome of the interaction between this carnivorous species and its prey MH - Mexico|Distrito Federal MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000185459000009 L2 - carnivorous habit;environmental heterogeneity;insectivorous plants;Lentibulariaceae;Pinguicida;SUB-ARCTIC ENVIRONMENT; NITROGEN; DROSERA; GROWTH; RESPONSES; NUTRITION; NUTRIENTS; INSECTS; FITNESS SO - American Journal of Botany 2003 ;90(9):1341-1348 7248 UI - 7882 AU - Alcubierre M AU - Becerril R AU - Guzman FS AU - Matos T AU - Nunez D AU - Urena-Lopez LA AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Michoacana, Inst Fis Matemat, Morelia 58040, Michoacan, MexicoMax Planck Inst Gravitat Phys, D-14476 Golm, GermanyInst Politecn Nacl, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandAlcubierre, M, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Numerical studies of Phi(2-)oscillatons AB - We present an exhaustive analysis of the numerical evolution of the Einstein-Klein-Gordon equations for the case of a real scalar field endowed with a quadratic self-interaction potential. The self-gravitating equilibrium configurations are called oscillatons and are closely related to boson stars, their complex counterparts. Unlike boson stars, for which the oscillations of the two components of the complex scalar field are such that the spacetime geometry remains static, oscillatons give rise to a geometry that is time dependent and oscillatory in nature. However, they can still be classified into stable (S-branch) and unstable (U-branch) cases. We have found that S-oscillatons are indeed stable configurations under small perturbations and typically migrate to other S-profiles when perturbed strongly. On the other hand, U-oscillatons are intrinsically unstable:. they migrate to the S-branch if their mass is decreased and collapse to black holes if their mass is increased even by a small amount. The S-oscillatons can also be made to collapse to black holes if enough mass is added to them, but such collapse can be efficiently prevented by the gravitational cooling mechanism in the case of diluted oscillatons MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000184355200033 L2 - STARS; OSCILLATONS SO - Classical and Quantum Gravity 2003 ;20(13):2883-2903 7249 UI - 8497 AU - Alcubierre M AU - Brugmann B AU - Diener P AU - Koppitz M AU - Pollney D AU - Seidel E AU - Takahashi R AD - Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, GermanyUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPenn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAUniv Illinois, Beckman Inst, Natl Ctr Supercomp Applicat, Urbana, IL 61801, USATheoret Astrophys Ctr, DK-2100 Copenhagen, DenmarkAlcubierre, M, Max Planck Inst Gravitat Phys, Albert Einstein Inst, Muhlenberg 1, D-14476 Golm, Germany TI - Gauge conditions for long-term numerical black hole evolutions without excision AB - Numerical relativity has faced the problem that standard 3+1 simulations of black hole spacetimes without singularity excision and with singularity avoiding lapse and vanishing shift fail early on due to the so-called slice stretching. We discuss lapse and shift conditions for the nonexcision case that effectively cure slice stretching and allow run times of 1000M and more MH - Denmark MH - Germany MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 84 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000182728200057 L2 - INITIAL DATA; GENERAL-RELATIVITY; GRAVITATIONAL-RADIATION; BOUNDARY-CONDITIONS; CONSTRUCTION; COLLISIONS; SPACETIMES; STABILITY; EQUATIONS; SYMMETRY SO - Physical Review D 2003 ;67(8): 7250 UI - 9554 AU - Alejandre J AU - Duda Y AU - Sokolowski S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoNatl Acad Sci Ukraine, Inst Condensed Matter Phys, Lvov 11, UkraineMarie Curie Sklodowska Univ, Dept Modeling Physicochem Proc, PL-20031 Lublin, PolandAlejandre, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Av San Rafael Atlixco 186, Mexico City 09340, DF, Mexico TI - Computer modeling of the liquid-vapor interface of an associating Lennard-Jones fluid AB - Monte Carlo and molecular dynamics methods have been used to investigate the influence of chemical association on the structure and thermodynamic properties of the liquid-vapor interface of dimerizing Lennard-Jones fluids. The molecular dynamics simulations have been carried out to obtain the surface tension for the so-called pseudo-mixture model of an associating fluid. The simulation data are also compared with the results of theoretical calculations, based on a density functional approach. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Poland MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000179879500040 L2 - DENSITY-FUNCTIONAL THEORY; DIMERIZING HARD-SPHERES; GREEN-YVON EQUATION; SURFACE-TENSION; MOLECULAR-DYNAMICS; THERMODYNAMIC PROPERTIES; CHEMICAL ASSOCIATION; PHASE-EQUILIBRIA; MONTE-CARLO; SIMULATION SO - Journal of Chemical Physics 2003 ;118(1):329-336 7251 UI - 6775 AU - Aleksandrov OV AU - Nikolaev YA AU - Sobolev NA AU - Asomoza R AU - Kudriavtsev Y AU - Villegas A AU - Godines A AD - St Petersburg State Univ Elect Engn, St Petersburg 197376, RussiaRussian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaIPN, CINVESTAV, Secc Elect Estado Solido, Mexico City 07738, DF, MexicoAleksandrov, OV, St Petersburg State Univ Elect Engn, St Petersburg 197376, Russia TI - Redistribution of ytterbium and oxygen in annealing of silicon layers amorphized by implantation AB - The redistribution of ytterbium and oxygen was studied in silicon layers that were implanted with 1-MeV Yb+ ions at a dose of 1 x 10(14) cm(-2), which exceeds the amorphization threshold, and 135-keV O+ ions at a dose of 1 x 10(15) cm(-2) and that were subsequently annealed at 620 and 900degreesC. The redistribution of Yb is due to segregation at the interface between the amorphous and single-crystal layers in solid-phase recrystallization of the buried amorphized layer. The redistribution of oxygen and its accumulation in regions with the highest concentration of Yb is associated with oxygen diffusion and the formation of YbOn complexes with n varying from 1 to 6. The parameters characterizing the dependence of the Yb segregation coefficient on the thickness of the recrystallized layer and the formation of YbOn complexes were determined. (C) 2003 MAIK "Nauka / Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7826 UR - ISI:000187004100001 L2 - PHASE EPITAXIAL CRYSTALLIZATION; AMORPHOUS-SILICON; ERBIUM; SI; ER SO - Semiconductors 2003 ;37(12):1363-1366 7252 UI - 7206 AU - Alent'ev AY AU - Yampol'skii YP AU - Rusanov AL AU - Likhachev DY AU - Kazakova GV AU - Komarova LG AU - Prigozhina MP AD - Russian Acad Sci, AV Topchiev Petrochem Synth Inst, Moscow 119991, RussiaRussian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 119991, RussiaMexican Natl Auton Univ, Mexico City 04510, DF, MexicoPetrov Plast Inst, Moscow 111024, RussiaAlent'ev, AY, Russian Acad Sci, AV Topchiev Petrochem Synth Inst, Leninskii Pr 29, Moscow 119991, Russia TI - Transport properties of poly(ether imides) AB - Gas-separation membrane properties of new poly(ether imides) with a common diamine fragment were studied, and permeability and diffusion coefficients for gases, such as H-2, He, O-2, N-2, CO2, and CH4, were determined. For a series of the allied polymers, the selectivity of gas separation was significantly affected by a small change in the free volume. One of the tested poly(ether imides) that was prepared through the polycondensation of 2,2-bis [(4-3,4'-dicarboxyphenoxy)phenyl]propane and 1,1,1,3,3,3-hexafluoro-2,2-bis[(3-aminophenoxy)-p-phenylene]propane, poly(ether imide) VI, holds promise as a gas-separation material. Due to the high selectivity of gas solubility, poly(ether imide) VI turned out to be above the upper bound on the Robeson diagram. The transport parameters of the related poly(ether imides) with a common dianhydride fragment were also examined. It was demonstrated that all the polymers of interest rank below poly(ether imide) VI in gas-separation selectivity. The group contribution method was used to predict the permeability coefficients for all the examined poly(ether imides), and the predicted transport parameters were found to correlate well with the experimental values MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 0965-545X UR - ISI:000185895800016 L2 - GLASSY-POLYMERS; AROMATIC POLYIMIDES; GAS-PERMEABILITY; PREDICTION; PERMSELECTIVITY; PERMEATION; DIFFUSION SO - Polymer Science Series A 2003 ;45(9):933-939 7253 UI - 7626 AU - Aleshkevich VA AU - Vysloukh VA AU - Zhukarev AS AU - Kartashev YV AU - Sinilo PV AD - Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, Cholula, MexicoAleshkevich, VA, Moscow MV Lomonosov State Univ, Dept Phys, Vorobevy Gory, Moscow 119992, Russia TI - Stimulated decay of N-soliton pulses and optimal separation of one-soliton components AB - The decay of an N-soliton optical pulse in optical fibres induced by the nonlinear interaction with a perturbing pulse is analysed numerically. The main attention is paid to the analysis of conditions under which the separation of soliton components occurs over a minimal distance. The analysis was performed by varying the carrier frequency of the perturbing pulse, its shift in time, and the phase difference. The numerical calculations are confirmed for the zero time shift by analytic calculations performed by the method of inverse scattering problem MH - Mexico|Puebla MH - Russia PB - LETCHWORTH: TURPION LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 1063-7818 UR - ISI:000184886100016 L2 - solitons;stimulated decay;optical fibres;OPTICAL FIBERS; INTERACTION FORCES; SYSTEMS SO - Quantum Electronics 2003 ;33(5):460-464 7254 UI - 7953 AU - Aleshkevich VA AU - Egorov AA AU - Kartashov YV AU - Vysloukh VA AU - Zelenina AS AD - Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, RussiaUniv Politecn Catalunya, Inst Photon Sci, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainUniv Americas Puebla, Dept Fis & Matemat, Puebla 72820, Cholula, MexicoAleshkevich, VA, Moscow MV Lomonosov State Univ, Dept Phys, Chair Gen Phys, Moscow 119899, Russia TI - Stability analysis of spatiotemporal cnoidal waves in cubic nonlinear media AB - We analyze numerically the modulational instability of spatiotemporal cnoidal waves of cn, dn, and sn types that are periodic along a single space coordinate and are uniform in time. The band of possible increments is calculated for all three types of cnoidal waves as a function of parameter describing the degree of localization of the wave field energy. It is shown that this band transforms into a set of discrete values for waves of cn and dn types in the limit of strong spatial localization. Simulation of perturbed cnoidal-wave propagation revealed suppression of collapse and multiple-wave filamentation on the developed stage of instability. Different instability scenarios are considered in detail MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000184085000081 L2 - TRANSVERSE MODULATIONAL INSTABILITY; BRIGHT SPATIAL SOLITONS; DEEP-WATER SOLITONS; SOLITARY WAVES; VORTEX SOLITONS; SCHRODINGER-EQUATIONS; SYMMETRY-BREAKING; SNAKE INSTABILITY; OPTICAL SOLITONS; DARK SOLITONS SO - Physical Review e 2003 ;67(6): 7255 UI - 7251 AU - Alessi BS AU - Moitinho A AU - Dias WS AD - Univ Sao Paulo, Dept Astron, BR-01060970 Sao Paulo, BrazilUNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoCAAUL, Observ Astron Lisboa, P-1349018 Lisbon, PortugalDias, WS, Univ Sao Paulo, Dept Astron, CP 3386, BR-01060970 Sao Paulo, Brazil TI - Searching for unknown open clusters in the Tycho-2 catalog AB - We present 11 new open cluster candidates found in a systematic search for unknown star clusters using the astrometric and photometric data included in the Tycho 2 catalog. The possible existence of these stellar aggregates is supported by the analysis of proper motions, color-magnitude diagrams, stellar density distributions, and by the visual inspection of the Digitized Sky Survey (DSS) plates. With these tools we were able to determine mean absolute proper motions as well as preliminary reddenings, distances and ages for the majority of the candidates. We found that most of them are possibly nearby (closer than similar to600 pc) open clusters never studied before MH - Brazil MH - Mexico|Baja California MH - Portugal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000185917300020 L2 - Galaxy : open clusters and associations : general;PROPER MOTIONS; NGC 6994; HIPPARCOS; PARAMETERS; PHOTOMETRY; CANDIDATES; STARS SO - Astronomy & Astrophysics 2003 ;410(2):565-5U4 7256 UI - 6497 AU - Alfaro J AU - Morales-Tecotl HA AU - Reyes M AU - Urrutia LF AD - Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, ChileUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoAlfaro, J, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 22, Chile TI - On non-Abelian holonomies AB - We provide a method and results for the calculation of the holonomy of a Yang-Mills connection in an arbitrary triangular path, in an expansion (developed here to fifth order) in powers of the corresponding segments. The results might have applications in generalizing to Yang-Mills fields previous calculations of the corrections to particle dynamics induced by loop quantum gravity, as well as in the field of random lattices MH - Chile MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000188062700013 L2 - QUANTUM-GRAVITY CORRECTIONS; LOCAL LORENTZ INVARIANCE; SPATIAL ANISOTROPY; RANDOM SURFACES; RANDOM LATTICE; LIMITS; LIGHT; TIME; CPT; PHENOMENOLOGY SO - Journal of Physics A-Mathematical and General 2003 ;36(48):12097-12107 7257 UI - 8574 AU - Alfonso P AU - Prol-Ledesma RM AU - Canet C AU - Melgarejo JC AU - Fallick AE AD - Univ Barcelona, Dept Cristallografia Mineral & Diposits Minerals, Barcelona 08028, SpainNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoSUERC, Isotope Geosci Unit, Glasgow G75 0QF, Lanark, ScotlandAlfonso, P, Univ Barcelona, Dept Cristallografia Mineral & Diposits Minerals, C Marti Franques S-N, Barcelona 08028, Spain TI - Sulfur isotope geochemistry of the submarine hydrothermal coastal vents of Punta Mita, Mexico AB - Coastal hydrothermal submarine vents occur near Punta Mita (Mexico) through a seafloor fissure hosted by basaltic rocks and partially covered by recent sediments. Hydrothermal venting produces calcareous tufa mounds, with minor sulfides, barite and apatite. Pyrite is the most abundant sulfide mineral that precipitates around the submarine hot springs. It occurs as framboids, euhedral crystals, thin botryoidal coatings interbedded with calcite, and as replacement of detrital magnetite gains. Vent fluids have temperature below 100 degreesC, and methane is abundant. Sulfur isotopic composition of pyrite predominantly has 534, 13 values from - 10.7 parts per thousand to + 4.9 parts per thousand suggesting that the source of sulfur is microbially reduced sulfate seawater. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800056 L2 - hydrothermal coastal vents;submarine mounds;pyrite;sulfur isotopes;Mexico;VOLCANISM; WATER SO - Journal of Geochemical Exploration 2003 ;78-9():301-304 7258 UI - 7913 AU - Almodovar NS AU - Font R AU - Portelles J AU - Raymond O AU - Martinez E AU - Siqueiros JM AD - Univ La Habana, IMRE, Fac Fis, Havana 10400, CubaUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoAlmodovar, NS, Univ La Habana, IMRE, Fac Fis, Havana 10400, Cuba TI - Preparation and characterization of 0.5PMN-0.5PFN ceramics using [Fe-0.6, Mg-0.4]NbO4 as precursor AB - A study of the calcination and sintering processes of 0.5PMN-0.5PFN ceramics prepared starting from the specifically designed precursor compound [Fe-0.6, Mg-0.4] NbO4, is presented. The microstructural characteristics are determined using X-ray diffraction and scanning electron microscopy. The resulting dielectric properties of the PMN-PFN samples thus obtained were very good when compared with those reported in the literature, for samples prepared at higher calcination temperatures. The dielectric properties as functions of temperature and the hysteresis loops (P vs. E) under different external applied electric fields are reported. (C) 2003 Kluwer Academic Publishers MH - Cuba MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000184190200013 L2 - LEAD MAGNESIUM NIOBATE; DIELECTRIC-PROPERTIES; PMN-PFN; PB(FE1/2NB1/2)O-3; FABRICATION; RELAXORS SO - Journal of Materials Science 2003 ;38(14):3085-3088 7259 UI - 8189 AU - Alonso G AU - Berhault G AU - Paraguay F AU - Rivera E AU - Fuentes S AU - Chianelli RR AD - Univ Poitiers, CNRS, UMR 6503, Catalyse Chim Organ Lab, F-86022 Poitiers, FranceUniv Texas, Mat Res Technol Inst, El Paso, TX 79968, USACtr Invest Mat Avanzados, Chihuahua 31109, Chih, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Queretaro 76000, MexicoUNAM, Ctr Ciencias Mat Condensada, Dept Catalisis, Ensenada 22830, Baja California, MexicoBerhault, G, Univ Poitiers, CNRS, UMR 6503, Catalyse Chim Organ Lab, 40 Ave Recteur Pineau, F-86022 Poitiers, France TI - Mesoporous carbon-containing MoS2 materials formed from the in situ decomposition of tetraalkylammonium thiomolybdates AB - Molybdenum disulfide with unique mesoporous structure was synthesized from tetraalkylammonium thiometallate precursors in situ decomposed in a batch reactor in the presence of dibenzothiophene (DBT). The precursors used in this study were tetraalkylammonium thiomolybdates with alkyl groups ranging from propyl to octyl. Molybdenum disulfide thus prepared presents high surface area (from 255 up to 329 m(2)/g), high content of carbon (C/Mo = 2.7-4.0) and type IV nitrogen adsorption-desorption isotherms when decomposed from tetrahexyl-, tetraheptyl- or tetraoctylammonium thiomolybdates. The as-formed materials ate poorly crystallized with a very weak intensity of the (0 0 2) peak of the 2H-MoS2 structure. Such diffraction patterns are characteristic of exfoliated samples. Characterization by TEM shows a disordered layered structure with no long range order for the MoS2 catalysts. Therefore, the nature of the alkyl group in the precursor affects both the surface area and the pore size distribution of the final MoS2 catalysts with a progressive morphological modification up to a mesoporous organization. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000183575200013 L2 - layered compounds;chemical synthesis;electron microscopy;X-ray diffraction;CAPILLARY CONDENSATION; MOLYBDENUM-DISULFIDE; DOMAIN COMPLEXIONS; BOUNDARY CURVE; CATALYSTS; SULFIDES; HYDRODESULFURIZATION; CO SO - Materials Research Bulletin 2003 ;38(6):1045-1055 7260 UI - 7484 AU - Alonso MA AU - Antillon A AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAlonso, MA, Univ Rochester, Inst Opt, 601 Elmwood Ave, Rochester, NY 14627 USA TI - Angle-impact representations for wave fields in convex cavities AB - A set of phase space distributions for representing the resonant modes of a wave field in a convex billiard is presented and compared to the standard Husimi distribution at the boundary. These representations have the angle and impact parameter of a ray as variables, rather than the standard position around the boundary and tangential momentum. We show that these new options present several features, and are useful in the study of open cavities. As an example, we consider the bowtie mode of a quadrupole-deformed billiard. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000185295000001 L2 - microlaser cavities;phase space representations;COHERENT FIELDS; MIXED SYSTEMS; RADIOMETRY; RESONATORS; DIMENSIONS; RAYS SO - Optics Communications 2003 ;224(4-6):159-173 7261 UI - 8864 AU - Alonso MA AU - Pogosyan GS AU - Wolf KB AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoJoint Inst Nucl Res, Theoret Phys Lab, Dubna, RussiaYerevan State Univ, Int Ctr Adv Studies, Yerevan 375049, ArmeniaAlonso, MA, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Wigner functions for curved spaces. II. On spheres AB - The form of the Wigner distribution function for Hamiltonian systems in spaces of constant negative curvature (i.e., hyperboloids) proposed in M. A. Alonso, G. S. Pogosyan, and K. B. Wolf, "Wigner functions for curved spaces. I. On hyperboloids" [J. Math. Phys. 43, 5857 (2002)], is extended here to spaces whose curvature is constant and positive, i.e., spheres. An essential part of this construction is the use of the functions of Sherman and Volobuyev, which are an overcomplete set of plane-wave-like solutions of the Laplace-Beltrami equation for this space. Rotations that displace the poles transform these functions with a multiplier factor, and their momentum direction becomes formally complex; the covariance properties of the proposed Wigner function are understood in these terms. As an example for the one-dimensional case, we consider the energy eigenstates of the oscillator on the circle in a Poschl-Teller potential. The standard theory of quantum oscillators is regained in the contraction limit to the space of zero curvature. (C) 2003 American Institute of Physics MH - Armenia MH - Mexico|Morelos MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000181729000002 L2 - DYNAMICAL SYMMETRIES; SPHERICAL GEOMETRY; LIE-ALGEBRAS; WAVE-FIELDS; SYSTEMS; SCATTERING; STATE; SPIN SO - Journal of Mathematical Physics 2003 ;44(4):1472-1489 7262 UI - 7665 AU - Alpay D AU - Schneider B AU - Shapiro M AU - Volok D AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelInst Politecn Nacl, Dept Matemat, Escuela Super Fis & Matemat, Mexico City 07300, DF, MexicoAlpay, D, Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, Israel TI - Rational functions and realization theory: the hyperholomorphic case AB - We define and study the ring of rational functions in the hyperholomorphic setting. We give a number of equivalent characterizations of rationality. The Cauchy-Kovalevskaya product plays an important role in the arguments. (C) 2003 Academie des sciences. Publie par Editions scientifiques et medicales Elsevier SAS. Tous droits reserves MH - Israel MH - Mexico|Distrito Federal PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000184922600003 L2 - INTERPOLATION SO - Comptes Rendus Mathematique 2003 ;336(12):975-980 7263 UI - 7864 AU - Alpeeva IS AU - Soukharev VS AU - Alexandrova L AU - Shilova NV AU - Bovin NV AU - Csoregi E AU - Ryabov AD AU - Sakharov IY AD - Moscow MV Lomonosov State Univ, Fac Chem, Dept Chem Enzymol, Moscow 119899, RussiaUNAM, Inst Invest Mat, Mexico City, DF, MexicoShemyakin & Ovchinnikov Inst Bioorgan Chem, Moscow, RussiaLund Univ, Dept Biotechnol, Ctr Chem & Chem Engn, Lund, SwedenGV Plekhanov Russian Econ Acad, Div Chem, Moscow 113054, RussiaSakharov, IY, Moscow MV Lomonosov State Univ, Fac Chem, Dept Chem Enzymol, Moscow 119899, Russia TI - Cyclometalated ruthenium(II) complexes as efficient redox mediators in peroxidase catalysis AB - Cyclometalated ruthenium(II) complexes, [Ru-II(Csimilar toN)(Nsimilar toN)(2)]PF6 [HCsimilar toN=2-phenylpyridine (Hphpy) or 2-(4'-tolyl)pyridine; Nsimilar toN=2,2'-bipyridine, 1,10-phenanthroline, or 4,4'-dimethyl-2,2'-bipyridine], are rapidly oxidized by H2O2 catalyzed by plant peroxidases to the corresponding Ru-III species. The commercial isoenzyme C of horseradish peroxidase (HRP-C) and two recently purified peroxidases from sweet potato (SPP) and royal palm tree (RPTP) have been used. The most favorable conditions for the oxidation have been evaluated by varying the pH, buffer, and H2O2 concentrations and the apparent second-order rate constants (k(app)) have been measured. All the complexes studied are oxidized by HRP-C at similar rates and the rate constants k(app) are identical to those known for the best substrates of HRP-C (10(6)-10(7) M-1 s(-1)). Both cationic (HRP-C) and anionic (SPP and RPTP) peroxidases show similar catalytic efficiency in the oxidation of the Ru-II complexes. The mediating capacity of the complexes has been evaluated using the SPP-catalyzed co-oxidation of [Ru-II(phpy)(bpy)(2)]PF6 and catechol as a poor peroxidase substrate as an example. The rate of enzyme-catalyzed oxidation of catechol increases more than 10,000-fold in the presence of the ruthenium complex. A simple routine for calculating the rate constant k(c) for the oxidation of catechol by the Ru-III complex generated enzymatically from [Ru-II(phpy)(bpy)(2)](+) is proposed. It is based on the accepted mechanism of peroxidase catalysis and involves spectrophotometric measurements of the limiting Ru-II concentration at different concentrations of catechol. The calculated k(c) value of 0.75 M-1 s(-1) shows that the cyclometalated Ru-II complexes are efficient mediators in peroxidase catalysis MH - Mexico|Distrito Federal MH - Russia MH - Sweden PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0949-8257 UR - ISI:000184294700011 L2 - catechol;cyclometalated complexes;plant peroxidases;redox mediators;ruthenium complexes;HORSERADISH-PEROXIDASE; HYDROGEN-PEROXIDE; LIGNIN PEROXIDASE; GLUCOSE-OXIDASE; OXIDATION; INACTIVATION; 1,10-PHENANTHROLINE; FERROCENES; BIOSENSORS; MECHANISM SO - Journal of Biological Inorganic Chemistry 2003 ;8(6):683-688 7264 UI - 8435 AU - Alpera SQY AU - Jacobsen F AU - Juhl PM AU - Henriquez VC AD - Tech Univ Denmark, Orsted DTU, DK-2800 Lyngby KGS, DenmarkETS Arquitectura Valladolid, Dept Fis, Valladolid, SpainUniv So Denmark, Dept Phys, DK-5230 Odense, DenmarkCtr Nacl Metrol, Queretaro, Qro, MexicoJacobsen, F, Tech Univ Denmark, Orsted DTU, Bldg 352,Orsteds Plads, DK-2800 Lyngby KGS, Denmark TI - A BEM approach to validate a model for predicting sound propagation over non-flat terrain AB - A two-dimensional boundary element model for sound propagation in a homogeneous atmosphere above non-flat terrain has been constructed. An infinite impedance plane is taken into account in the Green's function in the underlying integral equation, so that only the nonflat parts of the terrain need to be discretised in the boundary element model. This Green's function is undefined for points below the impedance plane, and therefore valleys and hollows are taken into account by coupling the exterior domain above the ground with one or several interior domains below the ground, as suggested in a recent paper [J. Sound Vibrat. 223 (1999) 355]. The resulting BEM model, which can handle arbitrary combinations of barriers and hollows, has been used for validating a ray model for various difficult configurations, including combinations of valleys and barriers. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Denmark MH - Mexico|Queretaro MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Acoustics U5 - J;Article AV - English IS - 0003-682X UR - ISI:000183047200002 L2 - sound propagation;non-flat terrain;boundary element method;BOUNDARY-ELEMENT METHOD; IMPEDANCE PLANE SO - Applied Acoustics 2003 ;64(8):781-791 7265 UI - 9100 AU - Altesor A AU - Ezcurra E AD - Univ Republica, Fac Ciencias, Dept Ecol, Montevideo 11400, UruguaySan Diego Nat Hist Museum, San Diego, CA 92101, USAINE, Mexico City, DF, MexicoAltesor, A, Univ Republica, Fac Ciencias, Dept Ecol, Igua 4225, Montevideo 11400, Uruguay TI - Functional morphology and evolution of stem succulence in cacti AB - We explored, using a mathematical model, the changes in areole arrangement that have occurred during the evolution of stem succulence in different cactus life-forms. The study was based on field data. The model used two parameters: (a) areole density in the stem and (b) the divergence angle between successive areoles. The stem morphology in different cactus subfamilies is correlated to changes in one or both parameters. Gradual changes in stem compaction and in the divergence angle can explain the apparently complex evolutionary transition from primitive woody and leafy plants to the more evolved, stem-succulent morphologies of cacti. (C) 2002 Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Uruguay MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000181147200010 L2 - biomechanical constraints;cactaceae;phyllotaxis;DISTRIBUTIONS; PHYLLOTAXIS; CACTACEAE; GROWTH SO - Journal of Arid Environments 2003 ;53(4):557-567 7266 UI - 6395 AU - Aluja M AU - Perez-Staples D AU - ias-Ordonez R AU - Pinero J AU - McPheron B AU - Hernandez-Ortiz V AD - Inst Ecol, Xalapa, Veracruz, MexicoPenn State Univ, Dept Entomol, University Pk, PA 16802, USAAluja, M, Inst Ecol, AC Km 2-5 Carretera Antigua & Coatepec 351 Congre, Xalapa, Veracruz, Mexico TI - Nonhost status of Citrus sinensis cultivar Valencia and C-paradisi cultivar ruby red to Mexican Anastrepha fraterculus (Diptera : Tephritidae) AB - Anastrepha fraterculus (Wiedemann) is recognized as a pest of citrus, apples, and blackberries in South America. In Mexico, it is mainly found in fruit of the family Myrtaceae and has never been reported infesting citrus. Here, we sought to determine whether females stemming from Mexican A. fraterculus populations (collected in the state of Veracruz) would lay eggs in 'Valencia' oranges and 'Ruby Red' grapefruit and, if so, whether larvae would hatch and develop. We worked under laboratory and seminatural conditions (i.e., gravid females released in fruit-bearing, bagged branches in a commercial citrus grove) and used Anastrepha ludens (Loew), a notorious pest of citrus, as a control species. Under laboratory conditions, A. ludens readily accepted both oranges and grapefruit as oviposition substrates, but A. fraterculus rarely oviposited in these fruit (but did so in guavas, a preferred host) and no larvae ever developed. Eggs were deposited in the toxic flavedo (A. fraterculus) and nontoxic albedo (A. ludens) regions. Field studies revealed that, as was the case in the laboratory, A. fraterculus rarely oviposited into oranges or grapefruit and that, when such was the case, either no larvae developed (oranges) or of the few (13) that developed and pupated (grapefruit), only two adults emerged that survived I and 3 d, respectively (5-17% of the time necessary to reach sexual maturity). In sharp contrast, grapefruit exposed to A. ludens yielded up to 937 pupae and adults survived for >6 mo. Therefore, the inability of Mexican A. fraterculus to successfully develop in citrus renders the status of Mexican A.,fraterculus as a pest of citrus in Mexico as unsubstantiated MH - Mexico|Veracruz MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000188467500010 L2 - Anastrepha fraterculus;citrus;oviposition behavior;host status;pest status;FRUIT-FLIES DIPTERA; CERATITIS-CAPITATA; GENETIC-STRUCTURE; HOST-PLANT; FLY; POPULATION; GUATEMALA; OVIPOSITION; INFESTATION; BEHAVIOR SO - Journal of Economic Entomology 2003 ;96(6):1693-1703 7267 UI - 6409 AU - Aluja M AU - Rull J AU - Sivinski J AU - Norrbom AL AU - Wharton RA AU - ias-Ordonez R AU - az-Fleischer F AU - Lopez M AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoCtr Med Agr & Vet Entomol, Gainesville, FL 32604, USAUSDA, SEL, US Natl Museum, Washington, DC 20560, USATexas A&M Univ, Dept Entomol, College Stn, TX 77843, USACampana Nacl Moscas Fruta, Tapachula 30700, Chiapas, MexicoAluja, M, Inst Ecol AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Fruit flies of the genus Anastrepha (Diptera : Tephritidae) and associated native parasitoids (Hymenoptera) in the tropical rainforest biosphere reserve of Montes Azules, Chiapas, Mexico AB - We report the results of a 2-yr survey that determined some of the host plant and parasitoid associations of Anastrepha fruit flies (Diptera: Tephritidae) in the "Montes Azules" tropical rainforest biosphere reserve (State of Chiapas, Mexico). We collected a total of 57.38 kg of fruit representing 47 native species from 23 plant families. of these, 13 plant species from eight plant families were found to be native hosts of 9 species of Anastrepha. The following Anastrepha host associations were observed: Bellucia pentamera Naudin (Melastomataceae) with A. coronilli Carrejo y Gonzalez; Malmea gaumeri (Greenm.) Lundell (Annonaceae) with A. bahiensis Lima; Tabernamontana alba Mill. (Apocynaceae) with A. cordata Aldrich; Quararibea yunckeri Standl. (Bombacaceae) with A. crebra Stone; Ampelocera hottlei (Standl.) Standl. (Ulmaceae) with A. obliqua (Macquart) and A. fraterculus (Wiedemann); Zuelania guidonia Britton and Millsp. and Casearia tremula (Griseb.) Griseb. ex C. Wright (Flacourtaceae) with A. zuelaniae Stone; Psidium sartorianum (O. Berg.) Nied (Myrtaceae) with A. fraterculus; Psidium guajava L. and P. sartorianum (Myrtaceae) with A. striata Schiner; and Manilkara zapota (L.) Van Royen, Pouteria sp., Bumelia sebolana Lundell, and Calocarpum mammosum (L.) Pierre (Sapotaceae) with A. seirpentina (Wiedemann). The following are new host plant records: Malmea gaumeri for A. bahiensis; Quararibea yunckeri for A. crebra; Ampelocera hottlei for A. fraterculus and A. obliqua; Bumelia sebolana for A. serpentina; and Casearia tremula for A. zuelaniae. A. coronilli is reported for the first time in Mexico. Infestation levels were variable and ranged between 0 and 1.63 larvae/g of fruit depending on host species. Larvae of eight species of Anastrepha on nine plant species from six plant families were found to be parasitized by Doryctobracon areolatus Szepligeti, D. crawfordi Viereck, D. zeteki Musebeck (new report for Mexico and northernmost record for the species), Opius hirtus Fisher, Utetes anastrephae Viereck (all Hymenoptera: Braconidae), and Aganaspis pelleranoi Brethes (Hymenoptera: Figitidae). Percent parasitism ranged from 0 to 76.5%. We discuss our findings in light of their practical (e.g., biological control) and theoretical (e.g., species radiation) implications and highlight the importance of these types of studies given the rampant deforestation of tropical forests in Latin America and the risk of extinction of rare fruit fly species that could shed light on the evolution of host plant and parasitoid associations within the genus Anastrepha MH - Mexico|Chiapas MH - Mexico|Veracruz MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000188412000012 L2 - tephritidae;Anastrepha;host-plant relationships;parasitoids;conservation;RHAGOLETIS-POMONELLA DIPTERA; POPULATION FLUCTUATIONS; SPECIES DIPTERA; MANGO ORCHARDS; HOST-PLANT; COMPETITION; CONSERVATION; BIODIVERSITY; VERACRUZ; HOTSPOTS SO - Environmental Entomology 2003 ;32(6):1377-1385 7268 UI - 7636 AU - Alvarado M AU - Sheremetov L AD - Inst Mexicano Petr, PIMAyC, Mexico City 07730, DF, Mexico. Russian Acad Sci, St Petersburg Inst Informat & Automat, St Petersburg 196140, Russia TI - Modal structure for agents interaction based on concurrent actions AB - The central issue here is that individual agent actions interact. So, an action representation has to make these interactions explicit. The formalization of concurrent, parallel, and sequential actions as well as synchronous and asynchronous ones is introduced comparing it with existing proposals. Temporal modal logic formalism sets these different types of actions as particular cases of concurrent actions. This way the description and programming of diverse processes in distributed multi-agent systems can be made in an integrated fashion. The proposed model is illustrated through a multi-agent system for flexible manufacturing. TU Prolog is used to implement the developed formal model MH - Mexico|Distrito Federal MH - Russia T3 - MULTI-AGENT SYSTEMS AND APPLICATIONS IIILecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBX29Y AV - English IS - 0302-9743 UR - ISI:000184854600005 SO - 2003 ;():29-39 7269 UI - 9227 AU - Alvarez E AU - Gomez M AU - Paneque M AU - Posadas CM AU - Poveda ML AU - Rendon N AU - Santos LL AU - Rojas-Lima S AU - Salazar V AU - Mereiter K AU - Ruiz C AD - Univ Sevilla, CSIC, Inst Invest Quim, Seville 41092, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca, Hidalgo, MexicoVienna Univ Technol, Dept Chem, A-1060 Vienna, AustriaCSIC, Inst Ciencia Mat Madrid, Madrid 28049, SpainPaneque, M, Univ Sevilla, CSIC, Inst Invest Quim, Avda Americo Vespucio S-N, Seville 41092, Spain TI - Coupling of internal alkynes in Tp(Me2)Ir derivatives: Selective oxidation of a noncoordinated double bond of the resulting iridacycloheptatrienes MH - Austria MH - Mexico|Hidalgo MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000180842200018 L2 - ACTIVATION; COMPLEXES; CATALYSIS; LIGANDS; BENZENE SO - Journal of the American Chemical Society 2003 ;125(6):1478-1479 7270 UI - 7014 AU - Alvarez F AU - Celis A AU - Hoeg JT AD - Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoUniv Copenhagen, Inst Zool, Dept Zoomorphol, DK-2100 Copenhagen, DenmarkAlvarez, F, Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Microscopic anatomy of settled cypris larvae of Octolasmis californiana (Cirripedia : Lepadomorpha) AB - The external morphology of the cypris larva of the epibiotic barnacle Octolasmis californiana Newman, 1960, found on the gills of the portunid crab Callinectes arcuatus Ordway, 1863, from Nayarit, Mexico, is described for the first time. The cyprid is elongated, about 550 pro in length; the surface of the carapace exhibits scattered pores and short setae, with prominent frontal horn pores and five pairs of lattice organs. The arrangement of the lattice organs is different from previously reported patterns. The first pair of thoracopods is slightly different from the rest, for the endopod bears five setae and the exopod six, whereas thoracopods 2-6 bear six setae on the endopod and seven on the exopod. The external morphology of the cyprid of O. californiana combines derived characters, such as the type of lattice organs, with others that might be regarded as plesiomorphic, such as the setation pattern of the thoracopods MH - Denmark MH - Mexico|Distrito Federal PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000186430900002 L2 - ELECTRON-MICROSCOPY; ORGANS SO - Journal of Crustacean Biology 2003 ;23(4):758-764 7271 UI - 8005 AU - Alvarez J AU - Guzman-Partida M AU - Skornik U AD - New Mexico State Univ, Dept Math, Las Cruces, NM 88003, USAUniv Sonora, Dept Matemat, Hermosillo 83000, Sonora, MexicoAgr Univ Warsaw, PL-02787 Warsaw, PolandAlvarez, J, New Mexico State Univ, Dept Math, Las Cruces, NM 88003, USA TI - S '-convolvability with the Poisson kernel in the Euclidean case and the product domain case AB - We obtain real-variable and complex-variable formulas for the integral of an integrable distribution in the n-dimensional case. These formulas involve specific versions of the Cauchy kernel and the Poisson kernel, namely, the Euclidean version and the product domain version. We interpret the real-variable formulas as integrals of S'-convolutions. We characterize those tempered distribution that are S'-convolvable with the Poisson kernel in the Euclidean case and the product domain case. As an application of our results we prove that every integrable distribution on R-n has a harmonic extension to the upper half-space R-+(n+1). MH - Mexico|Sonora MH - Poland MH - USA PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0039-3223 UR - ISI:000183844400005 L2 - S '-convolution;Poisson kernels;weighted distribution spaces;SPACES SO - Studia Mathematica 2003 ;156(2):143-163 7272 UI - 7100 AU - Alvarez L AU - Martin GB AU - Galindo F AU - Zarco LA AD - Ctr Ensenanza Pract & Invest Prod & Salud Anim, Mexico City 14500, DF, MexicoUniv Western Australia, Fac Nat & Agr Sci, Sch Anim Biol, Crawleys, WA 6009, AustraliaUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoAlvarez, L, Ctr Ensenanza Pract & Invest Prod & Salud Anim, Cruz Blanca 486,San Miuel Topilejo, Mexico City 14500, DF, Mexico TI - Social dominance of female goats affects their response to the male effect AB - The aim of this study was to assess the influence of social rank of anestrous goats on their interval to ovulation after exposure to males. Forty-five adult females were observed before and after the introduction of males to their pen. Behavioural sampling was used in both periods to record agonistic interactions. An index of success (IS) for each goat, based on its ability to displace other individuals was then calculated and three ranking categories were designated, low, medium, and high-ranking goats. When the goats were exposed to the male, scan sampling every 5 min was used to record the position of each goat with respect to the male. An index of association (IA) with the male was then calculated for each goat. The time of ovulation was determined through progesterone concentrations in samples taken daily for 30 days after the introduction of the males. The time of conception was retrospectively calculated after kidding. Analysis of variance and Mann-Whitney tests were used to compare the intervals from the introduction of the males to ovulation and to conception between categories. Spearman correlations were used to relate the time of ovulation with the indices of success and association, as well as within each index. High and medium ranking goats ovulated before low-ranking individuals (P < 0.05). A total of 32 goats (76%) ovulated after the introduction of the males to the pen. The percentages of females ovulating in the high, medium, and low-ranking groups were 81.8% (9/11), 75% (12/16) and 73% (11/15), respectively (P > 0.05). High-ranking females conceived earlier than the other two categories (P < 0.05). The time from exposure to the male to ovulation was negatively correlated with the index of success (Rs = -0.49, P < 0.05) and with the index of association of the female with the male (Rs = -0.58, P < 0.05). A positive correlation was found between a doe's index of success and her index of association with the male (Rs = 0.64, P < 0.01). It is concluded that after the introduction of males, the high-ranking goats are the first individuals to ovulate and to conceive, probably due to the more intense stimulation that results from their closer association to the males. (C) 2003 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Agriculture, Dairy & Animal Science;Behavioral Sciences;Veterinary Sciences U5 - J;Article AV - English IS - 0168-1591 UR - ISI:000186297300003 L2 - goat;male effect;sexual biostimulation;social dominance;AUSTRALIAN CASHMERE GOAT; OVARIAN ACTIVITY; REPRODUCTIVE-PERFORMANCE; ANOVULATORY GOATS; ESTROUS FEMALES; DAIRY-COWS; BUCKS; PROGESTERONE; OVULATION; SUCCESS SO - Applied Animal Behaviour Science 2003 ;84(2):119-126 7273 UI - 8604 AU - Alvarez L AU - Sauceda A AU - Xiao MF AD - Univ Autonoma Baja California, Inst Ingn, Mexicali 21280, Baja California, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Optical transmission of a subwavelength aperture: size and fiber parameter dependence of near-field resolution AB - We present a theoretical calculation of the optical transmission of a subwavelength circular aperture in a thick and perfectly conducting screen coated upon an optical fiber. The theory is employed to study resolution of scanning near-field optical microscopy. In particular, we have studied the resolution dependence on the aperture size and the parameters of the fiber that is used to form the probe. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000182553400002 L2 - near field;aperture;CIRCULAR APERTURE; PROBES SO - Optics Communications 2003 ;219(1-6):9-14 7274 UI - 9262 AU - Alvarez L AU - Horowitz R AU - Toy CV AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USADiCon Fiberopt Inc, Richmond, CA 94804, USAAlvarez, L, Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico TI - Multi-destination traffic flow control in automated highway systems AB - Traffic flow control in automated highway systems (AHS) is addressed. A link layer controller for a hierarchical AHS architecture is presented. The controller proposed in this paper stabilizes the vehicular density and flow around predetermined profiles in a stretch of highway using speed and lane changes as control signals. Multiple lane highways in which vehicles have different destinations and types are considered. The control laws are derived from a model based on a principle of vehicle conservation and Lyapunov stability techniques. The implementation requires only local information. Simulation results are presented. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Transportation Science & Technology U5 - J;Article AV - English IS - 0968-090X UR - ISI:000180825900001 L2 - automated highway systems;traffic control;velocity control;multi-destination traffic;multi-type traffic;PLATOON SO - Transportation Research Part C-Emerging Technologies 2003 ;11(1):1-28 7275 UI - 8836 AU - Alvarez MT AU - Ledesma N AU - Tellez G AU - Molinari JL AU - Tato P AD - Univ Michoacana San Nicolas de Hidalgo, Fac Biol, Parasitol Lab, Morelia, Michoacan, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Anim Prod, Mexico City 04510, DF, MexicoUniv Arkansas, Dept Poultry Sci, Fayetteville, AR 72701, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoAlvarez, MT, Univ Michoacana San Nicolas de Hidalgo, Fac Biol, Parasitol Lab, Morelia, Michoacan, Mexico TI - Comparison of the immune responses against Salmonella enterica serovar Gallinarum infection between naked neck chickens and a commercial chicken line AB - The immune responses of indigenous naked neck (NaNa and Nana) and normally feathered (nana) chickens against a Salmonella Gallinarum (SG) infection were evaluated and compared with those of a commercial line ( B-380). Groups of 28-day-old chickens ( NaNa, Nana, nana, and B-380) were immunized orally and subcutaneously with 50 mug of SG antigens. Control non-immunized animals were inoculated with sterile saline solution. All chickens were challenged with 1 LD50 of SG and mortality was recorded daily for 20 days. Antibodies to SG were measured in sera before immunization, before the challenge, 10 days after the challenge, and at sacrifice. Peripheral blood lymphocyte proliferation assays were performed using concanavalin A and SG antigens. Results showed that non-immunized Nana chickens exhibited the best natural resistance to Salmonella infection, since only 30% of them died. In contrast, all control B-380 chickens died by the 13th day. Immunization with SG induced immunity in chickens of all genotypes. Indigenous naked neck and normally feathered chickens showed a higher survival rate when compared with B-380 chickens. Immunized Nana chickens showed the highest antibody titres (P < 0.05) as well as the highest thymidine incorporation in peripheral blood lymphocytes stimulated with con A or SG antigens (P < 0.05). The results show that Nana chickens are the most resistant to SG infection and the best responders to vaccination with SG antigens MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0307-9457 UR - ISI:000181842700009 L2 - IN-VIVO; ENTERITIDIS INFECTION; LAYING HENS; RESISTANCE; PERFORMANCE; LYMPHOKINES; HETEROSIS; PULLORUM; BROILERS; GENE SO - Avian Pathology 2003 ;32(2):193-203 7276 UI - 8299 AU - Alvarez R AU - Bonifaz R AU - Lunetta RS AU - Garcia C AU - Gomez G AU - Castro R AU - Bernal A AU - Cabrera AL AD - Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Direcc Gen Serv Computo Acad, Mexico City 04510, DF, MexicoUS EPA, Natl Exposure Res Lab MD 56, Res Triangle Pk, NC 27771, USAUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoAlvarez, R, Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, Mexico TI - Multitemporal land-cover classification of Mexico using Landsat MSS imagery AB - A complete land-cover classification of Mexico was performed using Landsat Multi-Spectral Scanner (MSS) imagery corresponding to years 1974, 1986 and 1990 (+/-1 y). The categorization of the approximately 2 M km(2) geographical region included the classification of approximately 300 equivalent scene images. Vegetation experts throughout the country provided an initial 250-class inventory of major vegetation associations by applying an unsupervised classification approach. A final regrouping was performed to produce a generalized thematic product containing 12 classes to provide a consistent national scale product. Classification accuracies were evaluated for each scene by means of cartographic comparison using two independently developed reference datasets corresponding to the 1970s and 1990s. An automated evaluation procedure was developed that incorporated decision rules to duplicate the results obtained using a manual accuracy assessment procedure. Overlaying both the image and the digital cartographic information allowed for the comparison of randomly selected pixels within each image scene. An overall accuracy for the three epochs of 62% was obtained for the 300 image scenes. Study results have provided a historical baseline documenting vegetation extent and distribution across Mexico over the two-decade period. This study serves as a possible model for subsequent North American land-cover characterization efforts MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Remote Sensing;Imaging Science & Photographic Technology U5 - J;Article AV - English IS - 0143-1161 UR - ISI:000183187000008 SO - International Journal of Remote Sensing 2003 ;24(12):2501-2514 7277 UI - 8196 AU - Alzaga R AU - Pena A AU - Ortiz L AU - Bayona JM AD - IIQAB, CSIC, Dept Environm Chem, Barcelona 08034, SpainUniv Nacl Autonoma Mexico, Dept Analyt Chem, Fac Chem, Mexico City 04510, DF, MexicoBayona, JM, IIQAB, CSIC, Dept Environm Chem, Jordi Girona 18-26, Barcelona 08034, Spain TI - Determination of linear alkylbenzensulfonates in aqueous matrices by ion-pair solid-phase microextraction-in-port derivatization-gas chromatography-mass spectrometry AB - Trace determination (low ng/ml) of linear alkylbenzensulfonates (LASs) in water was achieved by solid-phase microextraction (SPME) of ion-pairs formed with tetrabutylammonium. This ion-pairing reagent served two purposes. First, it allowed the extraction of LAS with the polydimethylsiloxane fiber by counterion association and second, the derivatization of the formed LAS ion pairs in the GC injection port at 300 degreesC to form the corresponding sulfonated butyl esters. The methodology developed allows the isomer specific determination of LAS at low detection limits (0.16-0.8 ng/ml), depending on the alkyl chain lengths of LASs with RSDs of 10-12%. Furthermore, the developed methodology was applied to urban wastewater and sea water and compared with a solid-phase extraction (SPE) method (e.g. C-18 and strong anion-exchange sorbent) to obtain concordant values for urban wastewater. Moreover, the developed SPME methodology overcame the procedural blank and matrix-dependent recoveries found in the SPE methodologies at low LAS concentrations. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000183650100007 L2 - water analysis;derivatization, GC;environmental analysis;alkyl benzenesulfonates, linear;surfactants;PERFORMANCE LIQUID-CHROMATOGRAPHY; FENTON OXIDATION-PRODUCTS; NONIONIC SURFACTANTS; SEWAGE-SLUDGE; QUANTITATIVE-DETERMINATION; DEGRADATION PRODUCTS; WATER SAMPLES; ALKYLBENZENESULFONATES; EXTRACTION; IDENTIFICATION SO - Journal of Chromatography A 2003 ;999(1-2):51-60 7278 UI - 9088 AU - Alzaga R AU - Pena A AU - Bayona JM AD - CSIC, IIQAB, Dept Environm Chem, ES-08034 Barcelona, SpainUniv Nacl Autonoma Mexico, Dept Analyt Chem, Fac Chem, CU Circuito Interior, Mexico City 04510, DF, MexicoBayona, JM, CSIC, IIQAB, Dept Environm Chem, Jordi Girona 18-26, ES-08034 Barcelona, Spain TI - Determination of phthalic monoesters in aqueous and urine samples by solid-phase microextraction-diazomethane on-fibre derivatization-gas chromatography-mass spectrometry AB - A solvent-free analytical methodology for the determination of phthalic monoesters (MPs) with diazomethane on-fibre derivatization using solid-phase microextraction-gas chromatography-mass spectrometry (SPME-DOFD-GC-MS) was developed. Among the different SPME fibres evaluated, the polydimethylsiloxane/divinylbenzene (PDMS/DVB) proved to be the most suitable for the determination of four MPs. The diazomethane on-fibre derivatization (DOFD) procedure was improved, avoiding diethyl ether as solvent. Equilibrium conditions were reached (15 min) and K'(MP) values were calculated. Under optimum MP extraction conditions (e.g. direct immersion, 4 mL of sample, 25degreesC extraction temperature, stirring at 1100 rpm, 20 min extraction time, 10 min derivatization reaction, and pH = 1.5), trace level concentrations of MPs (0.3-8.6 ng/mL) were detected, allowing the simultaneous determination of phthalic diesters (DPs). The overall SPME-GC-MS precision was improved by using four deuterated internal standards. The developed analytical methodology was applied to different environmental water matrices and human urine samples at MP concentrations ranging from 0.1-538 ng/mL. The developed analytical procedure is robust (50 analyses with the same fibre), rapid (40 min), and of low cost, improving the conventional analysis methods in terms of analysis time, background levels, and cost MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 1615-9314 UR - ISI:000181168300011 L2 - SPME;on-fibre derivatization;phthalate monoesters;GC-MS;urine;landfill leachates;wastewater;LIQUID-CHROMATOGRAPHY; WATER SAMPLES; ACID ESTERS; GC-MS; METABOLITES; EXTRACTION; CELLS; DEGRADATION; HERBICIDES; COMPONENTS SO - Journal of Separation Science 2003 ;26(1-2):87-96 7279 UI - 7010 AU - Ambrosio R AU - Torres A AU - Kosarev A AU - Zuniga C AU - Abramov AS AD - INAOE, Puebla 72000, MexicoAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaAmbrosio, R, INAOE, POB 51 & 216, Puebla 72000, Mexico TI - Silicon-germanium films prepared from SiH4 and GeF4 by low frequency plasma deposition AB - The properties of silicon-germanium films (a-Si1-xGex:H,F) deposited by low frequency plasma enhanced chemical vapor deposition (LF PECVD) from SiH4 and GeF4 have been studied. The films were deposited in capacitive discharge at frequency f = 110 kHz, substrate temperature T-s = 300 degreesC, pressure P = 0.6 Torr and power W = 350 W. Ge gas mixture composition, Xg, determined as [GeF4]/[SiH4 + GeH4] was varied from Xg = 0.1 to 1. The films were deposited from (1-Xg) SiH4 + XgGeF(4) mixture without dilution, with Ar and with H-2 dilution. Composition of the films was characterized by SIMS. The chemical bonding structure was studied by IR spectroscopy. It was found that the modes of Si-H, Ge-H, Si-Ge bonding depended on Ge content and gas dilutor. Transport of carriers was studied by the measurement of conductivity dependence on temperature. The reduction of activation energy from 0.86 to 0.39 eV and the increase of room temperature conductivity from 1 x 10(-9) to 2.1 X 10(-4) Omega(-1) cm(-1) were observed with the changes of Ge gas mixture Xg, from 0 to 1. No correlation between pre-exponent factor of conductivity sigma(0) and activation energy E-a was observed in the samples studied, in contrast to that in amorphous silicon (Meyer-Neldel rule). The data obtained are discussed in comparison with information available in literature on similar films obtained by alternative techniques. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000186435700027 L2 - AMORPHOUS-SILICON; SEMICONDUCTORS SO - Journal of Non-Crystalline Solids 2003 ;329(1-3):134-139 7280 UI - 8453 AU - Amezcua F AU - Nash RDM AU - Veale L AD - UNAM, Inst Ciencias Mar, Mazatlan 82040, Sinaloa, MexicoUniv Liverpool, Port Erin Marine Lab, Sch Biol Sci, Port Erin IM9 6JA, Man, EnglandAmezcua, F, UNAM, Inst Ciencias Mar, Av Joel Montes Camarena S-N, Mazatlan 82040, Sinaloa, Mexico TI - Feeding habits of the Order Pleuronectiformes and its relation to the sediment type in the north Irish Sea AB - The diets of scaldfish Arnoglossus laterna, dab Limanda limanda, lemon sole Microstomus kilt, long rough dab Hippoglossoides platessoides, solenette Buglossidium luteum, thickback sole Microchirus variegatus, plaice Pleuronectes platessa, witch Glyptocephalus cynoglossus and Dover sole Solea solea in the Irish Sea were determined for March and October 1997 and 1998 and compared. Similarities in diets were examined using multivariate analyses. In general, there were differences in diet between species and generally the diets were similar within a species. Smaller individuals tended to have a similar diet. There were seasonal changes in the diets of individual species. Likewise, the overlap in diets between species changed between seasons and to a certain extent between sediment types MH - United Kingdom MH - Mexico|Sinaloa PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000182915100024 L2 - PLATESSA L; COMMUNITY; FLATFISH; PLAICE SO - Journal of the Marine Biological Association of the United Kingdom 2003 ;83(3):593-601 7281 UI - 8091 AU - Amigo V AU - Busquets D AU - Gomez L AU - Ortiz JL AD - Univ Politecn Valencia, Dept Ingn Mecan & Mat, Valencia 46022, Spain. Tecnol Monterrey, Fracc San Pablo 76130, Mexico TI - Development of aluminium composites through P/M route: Case of nitrides AB - In the present study aluminium matrix composites reinforced with differente nitredes have been fabricated and studied. Processing technique was based on a powder metallurgy route consiting of mixing of powders, cold uniaxial compaction and extrusion. Base aluminium used as matrix was the AA6061 alloy (Al-Mg-Si), together with four different reinforcements in particulate form: TiN, Si3N4, BN and Li3N. The study carried out on the composites so produced was focused on microstructural analysis and mechanical and tribological testing. Microstructure of composites presented a good distribution of reinforcements, although some banding have been observed in some samples. Porosity levels was very low, reaching a densification level close to 100%. Strength of composites were higher than the unreinforced matrix in T1 state whereas for T6 state there was not a significant increase. Advantages of composites in terms of tribological properties were only for Si3N4 because a very low friction coefficient and for Li3N for low wear rate MH - Mexico|Nuevo Leon MH - Spain T3 - THERMEC'2003Materials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBW92N AV - English IS - 0255-5476 UR - ISI:000183626400341 SO - 2003 ;():2139-2144 7282 UI - 6966 AU - Amorin H AU - Perez J AU - Fundora A AU - Portelles J AU - Guerrero F AU - Soares MR AU - Martinez E AU - Siqueiros JM AD - Univ La Habana, Fac Fis, IMRE, Havana 10400, CubaUniv Oriente, Fac Ciencias Nat, Santiago De Cuba 90500, CubaUniv Aveiro, Lab Cent Anal, P-3810193 Aveiro, PortugalUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoAmorin, H, Univ Aveiro, Dept Ceram & Glass Eng, P-3810193 Aveiro, Portugal TI - Evidence of short-range antiferroelectric local states in lanthanum- and titanium-modified Sr0.3Ba0.7Nb2O6 ferroelectric ceramics AB - Structural and electrical measurements were performed on lanthanum- and titanium-modified Sr0.3Ba0.7Nb2O6 ferroelectric (FE) ceramics. Dielectric properties show a well-defined relaxor anomaly around -50 degreesC with double-loop hysteresis curves from this point to the transition temperature. The thesis of short-range antiferroelectric (AFE) local states having incommensurate (INC) structure embedded in the FE polar matrix is proposed to explain the observed behavior. Structural lattice parameters show negative expansion coefficients and INC superlattice diffraction spots were observed through the selected-area diffraction patterns in the [110] zone for this minority local states. The titanium modification of this system seems to be the key fact in the coupling of the INC structure to the AFE local states in the FE-AFE coexistence region. (C) 2003 American Institute of Physics MH - Cuba MH - Mexico|Baja California MH - Portugal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000186662000038 L2 - DIFFUSE PHASE-TRANSITION; STRONTIUM BARIUM NIOBATE; LEAD-ZIRCONATE-TITANATE; ELECTRON-MICROSCOPY; BRONZE STRUCTURE; TUNGSTEN; POLARIZATION SO - Applied Physics Letters 2003 ;83(21):4390-4392 7283 UI - 9020 AU - Anacona JR AU - Azocar M AU - Nusetti O AU - Rodriguez-Barbarin C AD - Univ Oriente, Dept Quim, Cumana, VenezuelaUniv Oriente, Dept Biol, Cumana, VenezuelaUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, MexicoAnacona, JR, Univ Oriente, Dept Quim, Apartado Postal 208, Cumana, Venezuela TI - Crystal structure of the first SH-containing tetrahedral cobalt(II) complex, [Co(quinoline)(2)(SH)(2)]. Superoxide dismutase activity AB - The preparation, spectroscopic properties and crystal structure of the bis-quinoline-bis-mercaptocobalt(II) complex [Co(quinoline)(2)(SH)(2)] are reported. The complex is tetrahedral with nitrogen donor atoms from two quinoline ligands and sulphur donor atoms from two mercapto groups. The superoxide dismutase mimetic activity of the complex was investigated using the indirect xanthine-xanthine oxidase nitroblue tetrazolium method and compared to that of the native enzyme MH - Mexico|Nuevo Leon MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0340-4285 UR - ISI:000181237600005 L2 - TRANSITION-METAL-COMPLEXES; POLY(TERTIARY PHOSPHINES); COPPER(II) COMPLEXES; MERCAPTO COMPLEXES; PULSE-RADIOLYSIS; LIGAND; 1,10-PHENANTHROLINE; NICKEL(II); RESOLUTION; INVITRO SO - Transition Metal Chemistry 2003 ;28(1):24-28 7284 UI - 6676 AU - Anaya AL AU - Mata R AU - Sims JJ AU - Gonzalez-Coloma A AU - Cruz-Ortega R AU - Guadano A AU - Hernandez-Bautista BE AU - Midland SL AU - Rios G AU - Gomez-Pompa A AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Calif Riverside, Riverside, CA 92521, USACSIC, Ctr Ciencias Medioambientales, Madrid, SpainAnaya, AL, Univ Nacl Autonoma Mexico, Inst Ecol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Allelochemical potential of Callicarpa acuminata AB - The allelochemical potential of Callicarpa acuminata ( Verbenaceae) was investigated by using a biodirected fractionation study as part of a long-term project to search for bioactive compounds among the rich biodiversity of plant communities in the Ecological Reserve El Eden, Quintana Roo, Mexico. Aqueous leachate, chloroform- methanol extract, and chromatographic fractions of the leaves of C. acuminata inhibited the root growth of test plants ( 23 -70%). Some of these treatments caused a moderate inhibition of the radial growth of two phytopathogenic fungi, Helminthosporium longirostratum and Alternaria solani ( 18 - 31%). The chloroform- methanol ( 1: 1) extract prepared from the leaves rendered five compounds: isopimaric acid ( 1), a mixture of two diterpenols [ sandaracopimaradien- 19- ol ( 3) and akhdarenol ( 4)], alpha- amyrin ( 5), and the flavone salvigenin ( 6)]. The phytotoxicity exhibited by several fractions and the full extract almost disappeared when pure compounds were evaluated on the test plants, suggesting a synergistic or additive effect. Compounds ( 4), ( 5), and the semisynthetic derivative isopimaric acid methyl ether ( 2) had antifeedant effects on Leptinotarsa decemlineata. Compound 5 was most toxic to this insect, followed by ( 2), ( 4), and ( 6) with moderate to low toxicity. No correlation was found between antifeedant and toxic effects on this insect, suggesting that different modes of action were involved. All the test compounds were cytotoxic to insect Sf9 cells while ( 6), ( 4), and ( 1) also affected mammalian Chinese Hamster Ovary ( CHO) cells. Compound 5 showed the strongest selectivity against insect cells. This study contributes to the knowledge of the defensive chemistry and added value of C. acuminata MH - Mexico|Distrito Federal MH - Spain MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000187278100012 L2 - Callicarpa acuminata;Verbenaceae;allelochemicals;isopimaric acid;alpha-amyrin;sandaracopimaradien;19-ol;akhdarenol;salvigenin;bioactivity;BIRCHBARK TRITERPENE BETULIN; FISH-KILLING COMPONENTS; CONSTITUENTS; TERPENOIDS; DITERPENES; ANTIFEEDANTS; CANDICANS SO - Journal of Chemical Ecology 2003 ;29(12):2761-2776 7285 UI - 8084 AU - Andrade E AU - Chromik S AU - Jergel M AU - Jergel M AU - Falcony C AU - Strbik V AU - Rocha MF AU - Zavala EP AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaIPN, CINVESTAV, Dipartimento Fis, Mexico City, DF, MexicoSlovak Acad Sci, Inst Phys, Bratislava, SlovakiaIPN, Escuela Super Ingn Mecan & Elect, Mexico City, DF, MexicoAndrade, E, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Study of the superconducting MgB2 films by ion beam analysis methods AB - Superconducting MgB2 films were prepared by sequential e-beam evaporation of boron and magnesium on randomly oriented sapphire, glassy carbon and silicon substrates followed by an in-situ annealing. Ion beam analysis (IBA) methods using a 2530 keV He-3(+) beam were applied to obtain the Mg and B film profiles by Rutherford backscattering (RBS) and nuclear reaction analysis (NRA). It was found that Mg and B diffuse rather deeply into the substrates due to the annealing process. A presence of O and C in the MgB2 films was detected, apparently as formation of MgO and eventually B2O3. The zero resistance critical temperatures T-infinity values were 28 K for MgB2/Al2O3 and 25 K for MgB2 /C samples. Because of a rather high annealing temperature of 700 degreesC, we obtained T-co = 8 K only in the case of MgB2/Si(111) sample. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183716900019 L2 - MgB2 superconducting films;ion beam analysis;Rutherford backscattering;nuclear reaction analysis;THIN-FILMS SO - Thin Solid Films 2003 ;433(1-2):103-107 7286 UI - 6877 AU - Andrade F AU - Casciola-Rosen LA AU - Rosen A AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoJohns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Dept Dermatol, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Dept Cell Biol & Anat, Baltimore, MD 21205, USARosen, A, 720 Rutland Ave,Room 1059, Baltimore, MD 21205, USA TI - Granzyme B-induced cell death AB - Granzyme B (GrB) is a serine protease that is released by cytotoxic lymphocytes to kill virus-infected and tumor cells. Recent advances in the understanding of GrB have stressed the importance of reassessing the mechanisms by which GrB accomplishes its death functions. These include the uptake and trafficking of GrB within target cells, pathways used to trigger cell death, and the mechanism(s) controlling its killing activity. In addition, the role that GrB plays in human pathologies is still to be defined. The purpose of this review is to discuss recent insights into the biology of GrB and to evaluate its functional significance in health and disease. Copyright (C) 2004 S. Karger AG, Basel MH - Mexico|Distrito Federal MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Review AV - English IS - 0001-5792 UR - ISI:000186818000003 L2 - apoptosis;caspase;CTL;cytotoxicity;granzyme B;GRANULE-MEDIATED APOPTOSIS; CYTOCHROME-C RELEASE; INTERLEUKIN-1-BETA CONVERTING-ENZYME; CYTOKINE RESPONSE MODIFIER; MITOCHONDRIAL PERMEABILITY TRANSITION; LYMPHOCYTE-INDUCED APOPTOSIS; L4 100-KILODALTON PROTEIN; LIGAND-INDUCED APOPTOSIS; BACULOVIRUS P35 PROTEIN; CYTOTOXIC T-LYMPHOCYTES SO - Acta Haematologica 2003 ;111(1-2):28-41 7287 UI - 6964 AU - Andrade F AU - Casciola-Rosen L AU - Rosen A AD - Inst Nacl CsMed & Nutr Salvador Zubiran, Mexico City, DF, MexicoJohns Hopkins Univ, Sch Med, Baltimore, MD 21218, USA TI - Differential species-specific autoantigen recognition/cleavage by granzyme B (GrB). Importance in the study of human autoimmune diseases MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801569 SO - Arthritis and Rheumatism 2003 ;48(9):S590-S590 7288 UI - 7638 AU - Andrade F AU - Casciola-Rosen LA AU - Rosen A AD - Johns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Dept Dermatol, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Dept Cell Biol & Anat, Baltimore, MD 21205, USAAndrade, F, Inst Nacl Cs Med & Nutr Salvador Zubiran, Dept Inmunol & Reumatol, Vasco Quiroga 15,Col Secc 16, Mexico City 14000, DF, Mexico TI - A novel domain in adenovirus L4-100K is required for stable binding and efficient inhibition of human granzyme B: Possible interaction with a species-specific exosite AB - Lymphocyte granule serine proteases (granzymes) play a critical role in protecting higher organisms against intracellular infections and cellular transformation. The proteases have also been implicated in the generation of tissue damage in a variety of chronic human conditions, including autoimmunity and transplant rejection. Granzyme B (GrB), one cytotoxic member of this family, achieves its effect through cleavage and activation of caspases as well as through caspase-independent proteolysis of cellular substrates. The 100,000-molecularweight (100K) assembly protein of human adenovirus type 5 (Ad5-100K) was previously defined as a potent and specific inhibitor of human GrB. We now show that although human, mouse, and rat GrB proteases are well conserved in terms of structure, substrate specificity, and function, Ad5-100K inhibitory activity is directed exclusively against the human protease. Biochemical analysis demonstrates that the specificity of the 100K protein for human GrB resides in two distinct interactions with the protease: (i) a unique sequence within the reactive site loop (P-1)Asp(48)-(P-1')Pro(49) in Ad5-100K which interacts with the active site and (ii) the presence of an additional inhibitor-enzyme interaction likely outside the enzyme catalytic site (i.e., an exosite). We have located this extended macromolecular interaction site in Ad5-100K within amino acids 688 to 781, and we have demonstrated that this region is essential for stable inhibitor-enzyme complex formation as well as efficient inhibition of human GrB. This novel component of the inhibitory mechanism of the 100K protein identifies a distinct target for selective inhibitor design, a finding which may be of benefit for diseases in which GrB plays a pathogenic role MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 0270-7306 UR - ISI:000184846700031 L2 - LYMPHOCYTE-MEDIATED CYTOTOXICITY; L4 100-KILODALTON PROTEIN; LIGAND-INDUCED APOPTOSIS; PROGRAMMED CELL-DEATH; CASPASE ACTIVATION; ASSEMBLY PROTEIN; TRANSCRIPTIONAL REPRESSION; TUMOR-SUPPRESSOR; KEY MEDIATORS; IN-VIVO SO - Molecular and Cellular Biology 2003 ;23(17):6315-6326 7289 UI - 8369 AU - Andreev V AU - Andrieu B AU - Anthonis T AU - Astvatsatourov A AU - Babaev A AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Eckstein D AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Issever C AU - Jacquet M AU - Jaffre M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Karschnick O AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Kjellberg P AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Koutov A AU - Kroseberg J AU - Kruger K AU - Kueckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Lobodzinski B AU - Loktionova N AU - Lubimov V AU - Luders S AU - Luke D AU - Lytkin L AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Mohrdieck S AU - Mondragon MN AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Potachnikova I AU - Povh B AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schorner-Sadenius T AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AD - PN Lebedev Phys Inst, Moscow 117924, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaUniv Mediterranee, CPPM, CNRS IN2P3, Marseille, FranceUniv Manchester, Dept Phys, Manchester, Lancs, EnglandLund Univ, Dept Phys, Lund, SwedenUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandSlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3 CNRS, Orsay, FranceEcole Polytech, LPNHE, IN2P3 CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3 CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3 CNRS, Paris, FranceCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-5600 Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandUniv Instelling Antwerp, Antwerp, BelgiumULB VUB, Inter Univ Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Chilton, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCtr Etud Saclay, CEA, DSM DAPNIA, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyCERN, Geneva, SwitzerlandUniv Karlsruhe, Inst Expt Kernphys, Karlsruhe, GermanyCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoSafarik Univ, Kosice, SlovakiaNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceAndreev, V, PN Lebedev Phys Inst, Leninsky Prospect 53, Moscow 117924, Russia TI - Isolated electrons and muons in events with missing transverse momentum at HERA AB - A search for events with a high-energy isolated electron or muon and missing transverse momentum has been performed at the electron-proton collider HERA using an integrated luminosity of 13.6 pb(-1) in e(-) p scattering and 104.7 pb(-1) in e(+) p scattering. Within the Standard Model such events are expected to be mainly due to W boson production with subsequent leptonic decay. In e(-) p interactions one event is observed in the electron channel and none in the muon channel, consistent with the expectation of the Standard Model. In the e(+) p data a total of 18 events are seen in the electron and muon channels compared to an expectation of 12.4 +/- 1.7 dominated by W production (9.4 +/- 1.6). Whilst the overall observed number of events is broadly in agreement with the number predicted by the Standard Model, there is-an excess of events with transverse momentum of the hadronic system greater than 25 GeV with 10 events found compared to 2.9 +/- 0.5 expected. The results are used to determine the cross-section for events with an isolated electron or muon and missing transverse momentum. (C) 2003 Published by Elsevier Science B.V MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000183005700006 L2 - DEEP-INELASTIC SCATTERING; ENERGY EP COLLISIONS; HADRON-COLLISIONS; BOSON PRODUCTION; QCD CORRECTIONS; CROSS-SECTIONS; W-PRODUCTION; PHOTOPRODUCTION; CALORIMETER; GENERATOR SO - Physics Letters B 2003 ;561(3-4):241-257 7290 UI - 6631 AU - Andres Y AU - Texier AC AU - Le Cloirec P AD - Ecole Mines, CNRS, GEPEA, UMR 6144, F-44307 Nantes 3, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Lab Fisiol & Microbiana, Iztapalapa 09340, DF, MexicoAndres, Y, Ecole Mines, CNRS, GEPEA, UMR 6144, BP 20722, F-44307 Nantes 3, France TI - Rare earth elements removal by microbial biosorption: A review AB - This paper reviews published work on the sorption of rare earth elements by microbial biomass. In a first part, the biosorption capacities and the various experimental conditions performed in batch reactor experiments are compared. Secondly, sorption modelling generally used in biosorption studies are described. Thirdly, the microbial cell wall characteristics of the metallic ion binding sites are considered. From these observations it seems that the important functional groups for metallic ion fixation are the carboxyl and the phosphate moieties. Moreover, the competing effect of various ions like aluminium, iron, glutamate, sulphate etc. is described. Finally, some adsorption results of the rare earth elements in dynamic reactors are presented MH - France MH - Mexico|Distrito Federal PB - LONDON: SELPER LTD, PUBLICATIONS DIV RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0959-3330 UR - ISI:000187428200006 L2 - adsorption;micro-organisms;mechanisms;cation competition;rare earth elements;RHIZOPUS-ARRHIZUS BIOMASS; LANTHANIDE LA; PSEUDOMONAS-AERUGINOSA; SELECTIVE BIOSORPTION; YB IONS; MYCOBACTERIUM-SMEGMATIS; METAL ADSORPTION; EU; PH; GADOLINIUM SO - Environmental Technology 2003 ;24(11):1367-1375 7291 UI - 6925 AU - Angeler DG AU - Chow-Fraser P AU - Hanson MA AU - Sanchez-Carrillo S AU - Zimmer KD AD - Univ Castilla La Mancha, Dept Environm Sci, E-45071 Toledo, SpainMcMaster Univ, Dept Biol, Hamilton, ON, CanadaMinnesota Dept Nat Resources, Wetland Wildlife Populat & Res Grp, Bemidji, MN 56601, USAInst Tecnol Sonora, Dept Water Sci, Obregon, MexicoUniv St Thomas, Dept Biol, St Paul, MN, USAAngeler, DG, Univ Castilla La Mancha, Dept Environm Sci, Avda Carlos III S-N, E-45071 Toledo, Spain TI - Biomanipulation: a useful tool for freshwater wetland mitigation? AB - 1. Natural wetlands have traditionally been considered as efficient 'ecological engineers' for waste water treatment. However, the structure and function of many natural wetlands have been severely altered by the chronic exposure to pollutants, especially nutrients. 2. Despite the similarity of symptoms of eutrophied shallow lakes and wetlands, restoration strategies differ distinctly between these rather similar aquatic systems. Many of the tools applied in shallow lake restoration programs, for example biomanipulation, have received little attention in wetland management and restoration. 3. Although a strong conceptual basis for food web management exists, biotic interactions as influences on wetland communities have been largely neglected by wetland scientists and managers. 4. In this paper we show that biomanipulation may have a strong potential for wetland eutrophication abatement. This potential will be demonstrated by reviewing studies carried out in different wetland types in contrasting climatic regions. 5. We propose four different scenarios for when, where and why biomanipulation may be used to rehabilitate freshwater wetlands. These scenarios reflect different settings of hydrological variability, eutrophication sources and gradients of wind exposure and water colour MH - Canada MH - Mexico|Sonora MH - Spain MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0046-5070 UR - ISI:000186697000011 L2 - eutrophication abatement;hydrology;management;restoration;wetlands;GREAT-LAKES WETLAND; TABLAS-DE-DAIMIEL; SHALLOW LAKES; SUBMERGED MACROPHYTES; NUTRIENT DYNAMICS; TEMPERATE LAKES; COMMON CARP; RESTORATION; FISH; EUTROPHICATION SO - Freshwater Biology 2003 ;48(12):2203-2213 7292 UI - 6689 AU - Anten NPR AU - Martinez-Ramos M AU - Ackerly DD AD - Stanford Univ, Dept Biol Sci, Stanford, CA 94305, USAUniv Nacl Autonoma Mexico, Ctr Ecol, Morelia 58089, Michoacan, MexicoAnten, NPR, Univ Utrecht, Dept Plant Ecol, POB 800-84, NL-3508 TB Utrecht, Netherlands TI - Defoliation and growth in an understory palm: Quantifying the contributions of compensatory responses AB - We analyzed to what extent and by what mechanisms plants of the tropical understory palm Chamaedorea elegans are able to mitigate the negative effects of defoliation on performance (i.e., plant size, total growth, leaf lamina growth, and reproduction) and how this is related to light availability. For this purpose we developed a new approach that allowed us to quantify the performance of defoliated plants relative not only to the performance of undamaged plants, but also relative to the estimated performance of hypothetical defoliated plants that do not exhibit any. mechanisms of compensatory growth. The latter provides a way to quantify the adaptive value of compensation with reference to a hypothetical noncompensating alternative state. C. elegans plants were grown in a greenhouse at two light levels (5% and 16% of natural daylight) and subjected to five defoliation treatments (a control and four levels of defoliation). Defoliation was repeated every three months. Growth analysis revealed that defoliated plants allocated considerably more mass to the production of leaf laminas (f(lam)) than control plants, at the expense of allocation to other organs, particularly reproductive structures. Average growth rates per unit leaf area (NAR) and per unit plant mass (RGR), both measured on the basis of above-ground mass, increased with the level of defoliation at high light but not at low light. We estimated that the increases in f(lam) and NAR enabled C. elegans to compensate for part of the potential loss in performance caused by defoliation, even in cases where their RGR values were lower than those of control plants. Sensitivity analysis indicated that changes in NAR contributed more to this compensation than f(lam), but the importance of f(lam) increased with defoliation level and with decreasing light availability. The degree of compensation was higher in the high- than in the low-light treatment, suggesting that the possession of traits associated with compensatory growth. may be more important in sunny than in shaded environments. The degree of compensation differed depending on the measure of performance. Defoliated plants fully compensated for the potential reduction in lamina growth but compensated for <20% of estimated loss in reproductive output. Since survival of C. elegans plants appears to be. strongly associated with their total leaf area, the greater compensation for lamina growth is important in relation to population dynamics MH - Mexico|Michoacan MH - Netherlands MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000187363200010 L2 - biomass allocation;Chamaedorea elegans;compensatory growth;defoliation;growth analysis;herbivory;non-timber forest products;reproductive allocation;specific leaf area;tropical rain forest;INTRASPECIFIC VARIATION; CARBOHYDRATE RESERVES; HERBIVORY; PLANT; LEAF; PHOTOSYNTHESIS; TOLERANCE; AVAILABILITY; REPRODUCTION; ALLOCATION SO - Ecology 2003 ;84(11):2905-2918 7293 UI - 6495 AU - Antoine PO AU - Welcomme JL AU - Marivaux L AU - Baloch I AU - Benami M AU - Tassy P AD - Univ Montpellier 2, Lab Paleontol, F-34095 Montpellier, FranceUniv Baluchistan, Dept Geol, Quetta, PakistanNatl Autonomous Univ Mexico, Lab Paleomagnetismo, Mexico City 04510, DF, MexicoMuseum Natl Hist Nat, CNRS, UMR 8569, Lab Paleontol, F-75005 Paris, FranceAntoine, PO, Univ Montpellier 2, Lab Paleontol, CC064, F-34095 Montpellier, France TI - First record of Paleogene Elephantoidea (Mammalia, Proboscidea) from the Bugti Hills of Pakistan MH - France MH - Mexico|Distrito Federal MH - Pakistan PB - NORTHBROOK: SOC VERTEBRATE PALEONTOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Paleontology U5 - J;Article AV - English IS - 0272-4634 UR - ISI:000187843300025 L2 - MIDDLE EOCENE; EARLY MIOCENE; OLIGOCENE; MOROCCO SO - Journal of Vertebrate Paleontology 2003 ;23(4):977-980 7294 UI - 6840 AU - Aparicio F AU - Contreras R AU - Galvan M AU - Cedillo A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoUniv Chile, Fac Ciencias, Dept Quim, Santiago, ChileAparicio, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, AP 55-534, Mexico City 09340, DF, Mexico TI - Global and local reactivity and activation patterns of HOOX (X = H, NO2, CO2-, SO3-) peroxides with solvent effects AB - A detailed analysis of the global and local reactivity patterns of neutral and charged peroxides, including hydrogen peroxide (HOOH), peroxynitric acid (HOONO2), the peroxymonocarbonic ion (HOOCO2-), and the peroxymonosulfate ion (HOOSO3-) in the presence of a polar solvent (water) is presented. The polar solvent effects are included using an isodensity surface polarized continuum model (IPCM). The (1,2) hydrogen-shift reaction for these peroxides is studied. The transition states involved in the (1,2) hydrogen shift have been located and characterized at the B3LYP/6-311G** level of theory. The global analysis shows that, although the replacement of one hydrogen atom in HOOH by a neutral NO2 group enhances both the global softness and global electrophilicity, the substitution of one hydrogen atom by charged CO2- and SO3- groups results in a significant electrophilic deactivation of HOOCO2- and a moderate electrophilic activation of HOOSO3- This result is observed in both the ground state and in some activated forms involved in the (1,2) hydrogen rearrangement. The local analysis, however, shows that the transition-state structures for the same rearrangement of HOOH and the HOOCO2- ion display an electrophilicity-enhanced pattern at the oxygen atom that is being deprotonated, thereby suggesting that this activated form is more likely to be involved in the oxygen-transfer reactions. The site-activation analysis performed on the basis of the variations in local softness from the ground to the transition states is also consistent with this local reactivity picture MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000186762100012 L2 - OXYGEN-ATOM TRANSFER; DENSITY-FUNCTIONAL-APPROACH; FRONTIER-ELECTRON THEORY; HYDROGEN-PEROXIDE; AB-INITIO; WATER OXIDE; PEROXYMONOSULFATE ION; CHEMICAL-REACTIVITY; FUKUI FUNCTION; GAS-PHASE SO - Journal of Physical Chemistry A 2003 ;107(47):10098-10104 7295 UI - 6973 AU - Aparicio JMR AU - Gil CO AU - Barrientos MP AU - San Martin WB AU - Mendez MVC AU - Landini EM AU - Cao JAR AU - Enciso MAJ AU - Huitzil EM AU - Salinas CF AD - Hosp Nino Poblano, Mexico City, DF, MexicoBenemerita Univ Puebla, Mexico City, DF, MexicoMed Univ S Carolina, Charleston, SC 29425, USA TI - Inheritance and osseous damage between osteogenesis imperfecta type III and osteopetrosis in two Mexican families MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599700527 SO - American Journal of Human Genetics 2003 ;73(5):260-260 7296 UI - 9131 AU - Apiquian R AU - Ulloa E AU - Fresan A AU - Loyzaga C AU - Nicolini H AU - Kapur S AD - Carracci Med Grp, Mexico City, DF, MexicoRamon Fuente Natl Inst Psychiat, Div Clin Res, Mexico City, DF, MexicoDr Juan N Navarro Child Psychiat Hosp, Mexico City, DF, MexicoUniv Toronto, Schizophrenia Program, Toronto, ON, CanadaUniv Toronto, Dept Psychiat, Toronto, ON, CanadaKapur, S, CAMH, Clarke Div, PET Ctr, 250 Coll St, Toronto, ON M5T 1R8, Canada TI - Amoxapine shows atypical antipsychotic effects in patients with schizophrenia: results from a prospective open-label study AB - Objective: Amoxapine is marketed as an antidepressant. However, its receptor occupancy, in vitro and in vivo, and its effects in pre-clinical models are very similar to atypical antipsychotics. To examine if this leads to an atypical antipsychotic effect in the clinical context, the authors examined the antipsychotic and side-effect profile of amoxapine in acutely psychotic patients with schizophrenia. Methods: Seventeen patients were enrolled and 15 completed a prospective open-label 6-week study of amoxapine starting with a fixed-starting dose (150 mg/h) with standardized titration up to 250 mg/h, if required. Positive, negative, affective symptoms and side-effects were monitored using standardized weekly assessments. Results: Amoxapine (median final dose 210 mg/h) was well-tolerated and showed significant improvement in positive and negative symptoms (bothp < 0.001), with a trend towards improvement in mood symptoms and no treatment-emergent extrapyramidal side-effects, akathisia or weight gain. Prolactin elevation was observed. Conclusion: These clinical data lend support to the pre-clinical suggestions that amoxapine may be an atypical antipsychotic. Given its lack of weight gain and that it is considerably less expensive than current options, amoxapine could be a valuable alternative for some patients. These considerations strongly call for more systematic, double-blind studies of amoxapine as an atypical antipsychotic. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Psychiatry U5 - J;Article AV - English IS - 0920-9964 UR - ISI:000181043100006 L2 - antipsychotic;atypical;schizophrenia;antidepressant;serotonin;dopamine;RATING-SCALE; DEPRESSION; OCCUPANCY; VALIDITY SO - Schizophrenia Research 2003 ;59(1):35-39 7297 UI - 7112 AU - Aranda A AU - Balazs C AU - az-Cruz JL AD - Boston Univ, Dept Phys, Boston, MA 02215, USAFlorida State Univ, Dept Phys, Tallahassee, FL 32306, USABUAP, Inst Fis, Puebla 72570, MexicoAranda, A, Univ Colima, Fac Ciencias, Colima, Mexico TI - Where is the Higgs boson? AB - Electroweak precision measurements indicate that the standard model Higgs boson is light and that it could have already been discovered at LEP 2, or might be found at the Tevatron run 2. In the context of a TeV-1 size extra-dimensional model, we argue that the Higgs boson production rates at LEP and the Tevatron are suppressed, while they might be enhanced at the LHC or at CLIC. This is due to the possible mixing between brane and bulk components of the Higgs boson, that is, the non-trivial brane-bulk 'location' of the lightest Higgs. To parametrize this mixing, we consider two Higgs doublets, one confined to the usual space dimensions and the other propagating in the bulk. Calculating the production and decay rates for the lightest Higgs boson, we find that compared to the standard model (SM), the cross section receives a suppression well below but an enhancement close to and above the compactification scale M-c. This impacts the discovery of the lightest (SM like) Higgs boson at colliders. To find a Higgs signal in this model at the Tevatron run 2 or at the LC with roots = 1.5 TeV, a higher luminosity would be required than in the SM case. Meanwhile, at the LHC or at CLIC with roots similar to 3-5 TeV one might find highly enhanced production rates. This will enable the latter experiments to distinguish between the extra-dimensional and the SM for M-c up to about 6 TeV. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000186215100003 L2 - KALUZA-KLEIN EXCITATIONS; EXTRA DIMENSIONS; SPACE DIMENSIONS; STANDARD MODEL; COLLIDER; COMPACTIFICATION; MILLIMETER; TEV; CONSTRAINTS; UNIFICATION SO - Nuclear Physics B 2003 ;670(1-2):90-102 7298 UI - 7372 AU - Arceo A AU - Urban P AU - Dorsaz PA AU - Chatelain P AU - Verin V AU - Suilen C AU - Rombaut E AU - Chevrolet JC AD - Univ Hosp Geneva, Ctr Cardiol, Geneva, SwitzerlandArceo, A, R Gutierrez Velasco 213,La Alameda, Leon 37210, Gto, Mexico TI - In-hospital complications of percutaneous intraaortic balloon counterpulsation AB - Complications related to intraaortic balloon counterpulsation pumping (IABP) remain a problem despite the development of small caliber balloon catheter shafts and introducer sheaths. The authors report their experience in counterpulsation-related complications of 201 consecutive patients who underwent 212 percutaneous counterpulsation balloon insertions from June 1989 to June 1996 by use of balloons with 8-9.5 French shafts. Of these, 82% were men and 36 (18%) were women, with a mean age of 61 12 years. Indications for counterpulsation were acute myocardial infarction (AMI) (67%), severe left ventricular failure without AMI (20%), dilated cardiomyopathy (4%), unstable angina (3%), high-risk supported percutaneous coronary angioplasty (2%), and others (4%). IABP was instituted at the bedside in the intensive care unit in 82 patients (39%) and in the catheterization laboratory in 130 (61%). Median duration of counterpulsation was 48 hours (range 30 minutes to 25 days) with successful weaning from counterpulsation in 70% (148 of 212) of procedures. Overall in-hospital mortality rate was 45% (90 of 201). The overall complication rate was 22/212 (10.4%). Major complications were present in 10/212 procedures (4.7%): 6 patients with limb ischemia (1 death directly attributed to this complication, 1 with associated septicemia and limb amputation, 3 requiring surgical thromboembolectomy, and 1 with persistent limb ischemia treated medically until his death caused by intractable left ventricular failure), 2 with important bleeding (1 fatal despite vascular surgical repair and 1 requiring blood transfusion) and 2 with balloon rupture requiring vascular surgery. Minor complications were present in 12 procedures (5.7%), 6 with limb ischemia, 3 with local bleeding, and 3 with catheter dysfunction. All of these resolved after balloon removal and required no further intervention. When limb ischemia did develop it occurred after a median delay of 24 hours following balloon insertion (range 2 to 98 hours). The only predictor of limb ischemia among baseline clinical and procedure-related variables was an age greater than 60 years. Compared with previous recent studies, the rate of complications observed in this study performed with small balloon catheters was acceptably low. Limb ischemia was the most frequent complication, often occurred early, and required further intervention in half the cases MH - Mexico|Guanajuato MH - Switzerland PB - GLEN HEAD: WESTMINSTER PUBL INC RP - NOT IN FILE U3 - TC 3 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0003-3197 UR - ISI:000185573000007 L2 - ACUTE MYOCARDIAL-INFARCTION; VASCULAR COMPLICATIONS; PUMP; EXPERIENCE; INSERTION; SUPPORT SO - Angiology 2003 ;54(5):577-585 7299 UI - 7856 AU - arcon-Segovia D AU - Boffa MC AU - Branch W AU - Cervera R AU - Gharavi A AU - Khamashta M AU - Shoenfeld Y AU - Wilson W AU - Roubey R AD - Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoHosp Pitie Salpetriere, Dept Internal Med, Paris, FranceUniv Utah, Hlth Sci Ctr, Dept Obstet & Gynecol, Salt Lake City, UT, USAHosp Clin Barcelona, Dept Autoimmune Dis, Inst Clin Infecc & Immunol, Barcelona, Catalonia, SpainMorehouse Sch Med, Atlanta, GA 30310, USASt Thomas Hosp, Rayne Inst, Lupus Res Unit, London SE1 7EH, EnglandSheba Med Ctr, Res Ctr Autoimmune Dis, Tel Hashomer, IsraelLouisiana State Univ, Hlth Sci Ctr, Dept Med, Rheumatol Sect, New Orleans, LA 70112, USAUniv N Carolina, Div Rheumatol & Immunol, Chapel Hill, NC, USAAlarcon-Segovia, D, Inst Nacl Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco de Quiroga 15, Mexico City 14000, DF, Mexico TI - Prophylaxis of the antiphospholipid syndrome: a consensus report AB - Hypothetical circumstances that may require prophylaxis for a potential antiphospholipid syndrome (primary prophylaxis), or in some instances when there already had been some manifestations of the syndrome (secondary prophylaxis), were presented to a panel of experts for their consideration on potential prophylactic intervention. These were subsequently presented to the participants in the First International Consensus on Treatment of the Antiphospholipid Syndrome. In most instances there was consensus in adding low dose aspirin, an exception being aspirin allergy when other antiaggregants could be used in nonpregnant subjects. General measures to prevent thrombosis and other vaso-protective actions should also be provided. Higher risk of fetal loss or thrombosis called for anticoagulation with coumadin in nonpregnant subjects or subcutaneous low molecular weight heparin in pregnant ones. When indicated, prophylaxis of the antiphospholipid syndrome should be provided in systemic lupus erythematosus patients who are being treated for their disease. In no instance should corticosteroids or immunosuppresants be given as prophylactic of an antiphospholipid syndrome MH - United Kingdom MH - France MH - Israel MH - Mexico|Distrito Federal MH - Spain MH - USA PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 29 U4 - Rheumatology U5 - J;Article AV - English IS - 0961-2033 UR - ISI:000184363700003 L2 - anti-beta-2-glycoprotein;anticoagulation;antiphospholipid antibodies;low-dose aspirin;pregnancy loss;systemic lupus erythematosus;thrombosis prevention;SYSTEMIC-LUPUS-ERYTHEMATOSUS; ANTICARDIOLIPIN ANTIBODIES; THROMBOSIS; RISK SO - Lupus 2003 ;12(7):499-503 7300 UI - 9260 AU - arcon-Segovia D AU - Tumlin JA AU - Furie RA AU - Mckay JD AU - Cardiel MH AU - Strand V AU - Bagin RG AU - Linnik MD AU - Hepburn B AD - La Jolla Pharmaceut Co, San Diego, CA 92121, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoEmory Univ, Sch Med, Atlanta, GA, USAN Shore Univ Hosp, Manhasset, NY, USAStanford Univ, Palo Alto, CA 94304, USASantarus Inc, San Diego, CA, USALinnik, MD, La Jolla Pharmaceut Co, 6455 Nancy Ridge Dr, San Diego, CA 92121 USA TI - LJP 394 for the prevention of renal flare in patients with systemic lupus erythematosus - Results from a randomized, double-blind, placebo-controlled study AB - Objective. To determine whether UP 394 delays or prevents renal flare in patients with systemic lupus erythematosus (SLE) and a history of renal disease. Methods. In a 76-week, double-blind, placebo-controlled study, 230 SLE patients were randomized to receive 16 weekly doses of 100 mg of LJP 394 or placebo, followed by alternating 8-week drug holidays and 12 weekly doses of 50 mg of LJP 394 or placebo. An assay measuring the affinity of the serum IgG fraction for the DNA epitope of LJP 394 identified a high-affinity population of patients (189 of 213 patients; 89% taking LJP 394 and 90% taking placebo). Analyses were performed on both the intent-to-treat population and the high-affinity population. Results. Anti-double-stranded DNA antibodies decreased and C3 levels tended to increase during treatment with LJP 394. In the intent-to-treat population, the time to renal flare was not significantly different between treatment groups, but patients taking UP 394 had a longer time to institution of high-dose corticosteroids and/or cyclophosphamide (HDCC) and required 41% fewer treatments with HDCC. In the high-affinity population, the LJP 394 group experienced a longer time to renal flare, 67% fewer renal flares, longer time to institution of HDCC, and 62% fewer HDCC treatments compared with the placebo group. In patients with serum creatinine levels greater than or equal to1.5 mg/dl at study entry, those taking LJP 394 had 50% fewer renal flares; no renal flares were observed in the high-affinity group taking LIP 394. Serious adverse events were observed in 25 of the 114 LJP 394-treated patients (21.9%) and 34 of the 116 placebo-treated patients (29.3%). Conclusion. Treatment with LJP 394 in patients with high-affinity antibodies to its DNA epitope prolonged the time to renal flare, decreased the number of renal flares, and required fewer HDCC treatments compared with placebo. The study drug appeared to be well tolerated MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 72 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000180958200021 L2 - ANTI-DNA ANTIBODIES; DISEASE; LJP-394; AFFINITY; TRIALS; DEATH; DSDNA SO - Arthritis and Rheumatism 2003 ;48(2):442-454 7301 UI - 6072 AU - Ardila A AU - Matute E AU - Inozemtseva OV AD - Florida Int Univ, Commun Sci & Disorders, Miami, FL, USAUniv Guadalajara, Inst Neurosci, Guadalajara, Jalisco, MexicoUniv Guadalajara, Dept Estudios & Educ, Guadalajara, Jalisco, MexicoArdila, A, 12230 NW 8 St, Miami, FL 33182, USA TI - Progressive agraphia, acalculia, and anomia: A single case report AB - A case of a 50-year-old, right-handed female, monolingual native Spanish-speaker with a university-level education and cognitive changes is reported. Over approximately 2 years, she presented with a progressive deterioration of writing abilities associated with acalculia and anomia. An MRI disclosed a left parietal temporal atrophy. Two years later, further significant cognitive decline consistent with a dementia of the Alzheimer's type was observed. Amnesia, executive dysfunction, and ideomotor apraxia were found. Writing was severely impaired, and some difficulties in reading were observed. Copying abilities, however, were relatively well preserved, and the patient could drive and go to different city locations without significant spatial orientation difficulties. A second MRI approximately 2 years later showed that brain atrophy had progressed significantly. Spontaneous writing and writing to dictation were impossible. The ability to read words was preserved, but the ability to read pseudowords was lost. Changes in calligraphy were noted. This case clearly illustrates the progression of focal cognitive defects over time and the spread of abnormalities to other domains MH - Mexico|Jalisco MH - USA PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology;Psychology U5 - J;Article AV - English IS - 0908-4282 UR - ISI:000189388100002 L2 - progressive agraphia;progressive acalculia;progressive anomia;POSTERIOR CORTICAL ATROPHY; ALZHEIMERS-DISEASE; SEMANTIC APHASIA; FLUENT APHASIA; PICKS-DISEASE; DEMENTIA; APRAXIA; LANGUAGE; PATIENT; AGNOSIA SO - Applied Neuropsychology 2003 ;10(4):205-214 7302 UI - 8976 AU - Arellano E AU - Rogers DS AU - Cervantes FA AD - Brigham Young Univ, Dept Zool, Provo, UT 84602, USABrigham Young Univ, Monte L Bean Life Sci Museum, Provo, UT 84602, USAUniv Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoRogers, DS, Brigham Young Univ, Dept Zool, Provo, UT 84602, USA TI - Genic differentiation and phylogenetic relationships among tropical harvest mice (Reithrodontomys : subgenus Aporodon) AB - To assess genic differentiation and phylogenetic relationships among selected species in the subgenus Aporodon, we screened 31 presumptive genetic loci in 6 species in the subgenus Aporodon (R. creper, R. gracilis, R. mexicanus, R. microdon, R. spectabilis, and R. tenuirostris) And in 4 species in the subgenus Reithrodontomys (R. chrysopsis, R. fulvescens, R. megalotis, and R. sumichrasti). The resulting phylogenetic trees were compared with the results of previous molecular and morphological studies. Results demonstrate that the subgenus Aporodon is monophyletic. Relationships determined on the basis of allozymes are largely congruent with an earlier analysis based on morphological and molecular characters. However, samples of R. mexicanus do not form a monophyletic lineage. Accordingly, populations from north-central Oaxaca and Costa Rica each likely represent an undescribed species MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000181414700012 L2 - allozymes;Aporodon;harvest mice;monophyly;paraphyly;phylogeny;Reithrodontomys;BIOCHEMICAL SYSTEMATICS; PEROMYSCUS-BOYLII; SPECIES GROUP; POPULATIONS; PATTERNS; RODENTS SO - Journal of Mammalogy 2003 ;84(1):129-143 7303 UI - 6705 AU - Arena L AU - Montalvan M AU - Espinosa G AU - Gaxiola G AU - Sanchez A AU - van Wormhoudt A AU - Hernandez D AU - Diaz R AU - Rosas C AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Lab Ecol & Biol Marina Expt, Campeche, MexicoUniv La Habana, Fac Biol, Havana, CubaUniv La Habana, Ctr Invest Marinas, Havana, CubaMuseum Natl Hist Nat, Stn Biol Marine, Concarneau, FranceRosas, C, Univ Nacl Autonoma Mexico, Fac Ciencias, Lab Ecol & Biol Marina Expt, Apdo Post 69, Campeche, Mexico TI - Genetic relationship between Litopenaeus setiferus (L.) and L-schmitti (Burkenroad) determined by using 16S mitochondrial sequences and enzymatic analysis AB - Genetic differentiation and variability data of two populations of two species of shrimp (Litopenaeus setiferus (L.) and L. schmitti (Burkenroad)) have been obtained by electrophoretic analysis and by analysis of 16S mitochondrial DNA. Using eight polymorphic enzymes, the genetic distance (GD) between the two species was 0.165. The GD between L. setiferus populations was 0.0057 and between L. schmitti populations it was 0.0034. The greatest differentiation was found within, rather than between, populations, although the differentiation value between Mexican and Cuban populations varied in accordance with the geographic distance and ecological characteristic of each. We found a high similarity between these two species with a bimodal distribution of the loci with respect to genetic identity. The homology percentages for gene 16S fragments were compared with those from six different shrimp species (L. vannamei, L. stylirostris, Farfantepenaeus notialis, Metapeneopsis lamellata) and Artemia salina. Ninety-seven percent of identity was found by analysis of a 409 bp of 16S mitochondrial DNA. With these values a phylogenetic tree was made using parsimony criteria. The GDs obtained with this method confirm the classification proposed by Perez-Farfante & Kensley (1997) MH - Cuba MH - France MH - Mexico|Campeche PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000187290900002 L2 - Litopenaeus setiferus;L. schmitti;16S;enzymatic polymorphism;population studies;accession numbers L. vannamei;L. stylirostris;L. setiferus;16S mitochondrial DNA=AJ132780;AJ297970;AJ297971;PENAEUS-SETIFERUS; SHRIMP PENAEUS; MOLECULAR PHYLOGENY; DISSOLVED-OXYGEN; WHITE SHRIMP; DECAPODA; POPULATIONS; LINNAEUS; CRUSTACEA; SALINITY SO - Aquaculture Research 2003 ;34(12):981-990 7304 UI - 7211 AU - Ares O AU - Gamboa-Perera F AU - Sosa V AD - CINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, Merida 97310, MexicoUniv La Habana, Superconduct Lab IMRE, Vedado 10400, Ciudad Habana, CubaSosa, V, CINVESTAV, IPN, Unidad Merida, Dept Fis Aplicada, AP 73 Cordemex, Merida 97310, Mexico TI - Analysis of forced magnet oscillations above melt-textured YBa2Cu3O7: influence of excitation amplitude and superconductor temperature AB - The forced oscillations of a permanent magnet levitating over a superconducting sample are studied for different magnitudes of the external force. Results are discussed in terms of the one-dimensional model of a forced damped oscillator. It is found that there are two regimes, characterized by sudden and hysteretic changes in the waveform, frequency of resonance, and amplitude of oscillation. These changes are associated with the process of pinning/depinning of the vortex lattice, that produces also two different dependences of the amplitude of oscillation with temperature. On the other hand, it was demonstrated that it is possible to accurately monitor the superconducting transition by measuring the resonance peak changes with temperature. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000185975900009 L2 - LEVITATION-SYSTEM; YBCO; MOTION SO - Physica C-Superconductivity and Its Applications 2003 ;397(3-4):159-166 7305 UI - 8112 AU - Aretxaga I AU - Hughes DH AU - Chapin EL AU - Gaztanaga E AU - Dunlop JS AU - Ivison RJ AD - Inst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoCSIC, IEEC, ES-08034 Barcelona, SpainUniv Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandRoyal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, ScotlandAretxaga, I, Inst Nacl Astrofis Opt & Electr, Aptdo Postal 51 & 216, Puebla 72000, Mexico TI - Breaking the 'redshift deadlock' - II. The redshift distribution for the submillimetre population of galaxies AB - Ground-based submillimetre and millimetre wavelength blank-field surveys have identified more than 100 sources, the majority of which are believed to be dusty optically obscured starburst galaxies. Colours derived from various combinations of far-infrared, submillimetre, millimetre and radio fluxes provide the only currently available means to determine the redshift distribution of this new galaxy population. In this paper we apply our Monte Carlo photometric redshift technique, introduced recently by Hughes et al. in Paper I, to the multiwavelength data available for 77 galaxies selected at 850 mum and 1.25 mm. We calculate a probability distribution for the redshift of each galaxy, which includes a detailed treatment of the observational errors and uncertainties in the evolutionary model. The cumulative redshift distribution of the submillimetre galaxy population that we present in this paper, based on 50 galaxies found in wide-area SCUBA surveys, is asymmetric, and broader than those published elsewhere, with a significant high-z tail for some of the evolutionary models considered. Approximately 40 to 90 per cent of the submillimetre population is expected to have redshifts in the interval 2 less than or equal toz less than or equal to 4. Whilst this result is completely consistent with earlier estimates for the submillimetre galaxy population, we also show that the colours of many (less than or similar to50 per cent) individual submillimetre sources, detected only at 850 mum with non-detections at other wavelengths, are consistent with those of starburst galaxies that lie at extreme redshifts, z > 4. Spectroscopic confirmation of the redshifts, through the detection of rest-frame far-infrared-millimetre wavelength molecular transition lines, will ultimately calibrate the accuracy of this technique. We use the redshift probability distribution of HDF850.1 to illustrate the ability of the method to guide the choice of possible frequency tunings on the broad-band spectroscopic receivers that equip the large-aperture single-dish millimetre and centimetre wavelength telescopes MH - Mexico|Puebla MH - United Kingdom MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000183684600009 L2 - stars : formation;galaxies : evolution;cosmology : miscellaneous;infrared : galaxies;submillimetre;HUBBLE DEEP FIELD; STAR-FORMATION HISTORY; RADIO-EMISSION; PHOTOMETRIC REDSHIFTS; SCUBA-8-MJY SURVEY; LENSING CLUSTERS; SPECTRAL INDEX; DATA REDUCTION; SOURCE COUNTS; IDENTIFICATIONS SO - Monthly Notices of the Royal Astronomical Society 2003 ;342(3):759-801 7306 UI - 9248 AU - Argaman Z AU - Young VR AU - Noviski N AU - Castillo-Rosas L AU - Lu XM AU - Zurakowski D AU - Cooper M AU - Davison C AU - Tharakan JF AU - Ajami A AU - Castillo L AD - Massachusetts Gen Hosp, Serv Pediat, Boston, MA 02114, USAMIT, Human Nutr Lab, Cambridge, MA 02139, USALa Salle Univ, Sch Med, Mexico City, DF, MexicoShriners Burns Hosp, Boston, MA, USAMassTrace, Woburn, MA, USAChildrens Hosp, Dept Anesthesia, Boston, MA 02115, USAArgaman, Z, Shaare Zedek Med Ctr, Jerusalem, Israel TI - Arginine and nitric oxide metabolism in critically ill septic pediatric patients AB - Objective: To investigate whole body, in vivo arginine metabolism and nitric oxide synthesis rates in septic, critically ill pediatric patients. Design: Prospective study. Setting: Pediatric intensive care unit at a general hospital. Patients: Ten consecutive septic patients age 6-16 yrs. Interventions: Septic patients received an 8-hr primed, constant intravenous tracer infusion of L-[guanidino-N-15(2)]arginine, L-[1-C-13] leucine, and [C-13]urea. A 24-hr urine collection was obtained for determination of [N-15]nitrate enrichment ((15)N0(3)(-)) and urinary nitrogen. The next day they received an infusion of L-[5-C-13]arginine and L-[5-C-13-ureido, 5,5,H-2(2)]citrulline. Blood samples were obtained for determination of plasma isotopic enrichment of the tracers given and of derived [N-15]citrulline (nitric oxide synthesis), L-[C-13-guanidino 5,5, H-2(2)]arginine (M+3 arg) (arginine synthesis), and [N-15(2)]urea (urea formation). Data are compared with historic controls from studies in healthy young adults. Measurements and Main Results: Plasma arginine fluxes were 6 +/- 21 and 72 +/- 17 mumol.kg(-1).hr(-1), respectively, for the [N-15(2) guanidino] and the [13 C] arginine labels, which were not different from reported adult values. The rates of arginine oxidation were 22.9 +/- 10.8 mumol.kg(-1).hr(-1) and were higher than de novo arginine synthesis rates of 9.6 +/- 4.2 mumol.kg(-1).hr(-1) (p < .01); therefore, these patients were in a negative arginine balance. The rates of nitric oxide synthesis as estimated by the [N-15]citrulline method were 1.58 +/- 0.69 mumol.kg(-1).hr(-1) for septic patients and higher (p < .05) than values of 0.96 +/- 0.1 mumol.kg(-1).hr(-1) in healthy adults. Septic patients were in a negative protein (leucine) balance of about -1.00 +/- 0.40 g.kg(-1).day(-1). Conclusions: Homeostasis of plasma arginine in septic patients was impaired compared with reported adult values. The rates of arginine oxidation were increased whereas de novo net arginine synthesis was unchanged, leading to a negative arginine balance. The rates of nitric oxide synthesis and the fraction of plasma arginine used for nitric oxide and urea formation were increased. These findings suggest that under condition of sepsis, arginine becomes essential in critically ill children MH - Israel MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 32 U4 - Critical Care Medicine U5 - J;Article AV - English IS - 0090-3493 UR - ISI:000180919700036 L2 - pediatric sepsis;children;arginine;citrulline;leucine;nitric oxide;nitrate;stable isotopes;synthesis rate;oxidation;amino acid;kinetics;metabolism;INFLAMMATORY RESPONSE SYNDROME; INTENSIVE-CARE UNIT; ORGAN FAILURE; ENTERAL DIET; SEPSIS; SHOCK; BALANCE; KINETICS; NITRATE; ACID SO - Critical Care Medicine 2003 ;31(2):591-597 7307 UI - 6602 AU - Arias JM AU - Alonso CE AU - Vitturi A AU - Garcia-Ramos JE AU - Dukelsky J AU - Frank A AD - Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainDipartimento Fis G Galilei, I-35131 Padua, ItalyUniv Huelva, Dept Fis Aplicada, Huelva 21071, SpainCSIC, Inst Estructura Mat, E-28006 Madrid, SpainNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoArias, JM, Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, Apartado 1065, E-41080 Seville, Spain TI - U(5)-O(6) transition in the interacting boson model and the E(5) critical point symmetry AB - The relation of the recently proposed E(5) critical point symmetry with the interacting boson model is investigated. The large-N limit of the interacting boson model at the critical point in the transition from U(5) to O(6) is obtained by solving the Richardson equations. It is shown explicitly that this algebraic calculation leads to the, same results as the solution of the Bohr differential equation with a beta(4) potential MH - Italy MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000187575300003 SO - Physical Review C 2003 ;68(4): 7308 UI - 7624 AU - Arias S AU - Terrazas T AU - Cameron K AD - Univ Nacl Autonoma Mexico, Jardin Bot, Inst Biol, Mexico City 04510, DF, MexicoColegio Postgrad, Programa Bot, Montecillo 56230, MexicoNew York Bot Garden, Lewis B & Dorothy Cullman Program Mol Syst Studie, Bronx, NY 10458, USAArias, S, Univ Nacl Autonoma Mexico, Jardin Bot, Inst Biol, Mexico City 04510, DF, Mexico TI - Phylogenetic analysis of Pachycereus (Cactaceae, Pachycereeae) based on chloroplast and nuclear DNA sequences AB - The phylogenetic relationships of Pachycereus (Cactaceae) species and relatives from subtribe Pachycereinae were studied using DNA sequence data. The plastid rpl16 intron, trnL intron, trnL-F intergenic spacer, and nuclear rDNA internal transcribed spacer region (ITS) were sequenced for 30 species, representing the four genera of subtribe Pachycereinae (Carnegiea, Cephalocereus, Neobuxbaumia, and Pachycereus) as well as three additional outgroup genera from subtribe Stenocereinae. Phylogenetic analyses support neither the monophyly of Pachycereus as currently circumscribed nor Pachycereinae unless Stenocereus aragonii and S. eichlamii are included within it. However, these results suggest that the subtribe can be divided into three major clades. The first includes Pachycereus hollianus and P. lepidanthus, which is sister to a large clade combining species from the Pachycereus and Cephalocereus groups. Within this large clade Cephalocereus and Neobuxbaumia together with Pachycereus fulviceps are sister to the remaining species of Pachycereus as well as Stenocereus aragonii, S. eichlamii, and Carnegiea gigantea. Our results suggest that Pachycereus is paraphyletic and that several other genera (Backebergia, Lemaireocereus, Lophocereus, and Pseudomitrocereus) may be resurrected to accommodate these new phylogenetic insights. A number of morphological and anatomical characters support these relationships, indicating that future analyses combining both molecular and morphological characters will be particularly useful in resolving relationships within this group of columnar cacti MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000184845900008 L2 - COLUMNAR CACTI SO - Systematic Botany 2003 ;28(3):547-557 7309 UI - 7778 AU - Arias YM AU - Obraztsova A AU - Tebo BM AU - Green-Ruiz C AD - Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093, USAUniv Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biotechnol & Biomed, La Jolla, CA 92093, USANatl Autonomous Univ Mexico, Mazatlan Acad Unit, Inst Marine Sci & Limnol, Mazatlan, Sinaloa, MexicoTebo, BM, Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093 USA TI - Natural attenuation of Cr(VI) contamination in laboratory mesocosms AB - The processes leading to the natural attenuation of hexavalent chromium (Cr(VI)) in marine systems are not well understood. To determine the rate at which Cr(VI) could be reduced and the effect of Cr(VI) on bacterial communities in marine sediments, we performed mesocosm experiments with 37.85 L aquaria containing San Diego Bay sandy sediments and seawater. Constant levels of 0, 0.25 (low), and 1.5 mM (high) Cr(VI) were maintained in the water column for 2 months. Chemical analyses of sediment cores taken from the mesocosms indicated that Cr accumulated in the upper 5 mm of the sandy sediments. In general, the distribution of total Cr did not correlate with Fe, Mn, or total organic carbon. Enrichment cultures of metal (iron and chromium)- and sulfate-reducing bacteria from the upper horizon (0-5 mm) of sediments were performed to look for the potential contributors in the detoxification/removal process. PCR of 16S rRNA genes and denaturing gradient gel electrophoresis (DGGE) was used to examine the microbial community structure in sediment depth profiles. When Cr(VI) was present, the number of DGGE bands decreased only in the upper 5 mm of sediments indicating an inhibition of certain bacterial populations and/or a selection for Cr-resistant bacteria in this region. Analysis of the DGGE bands was not especially helpful as most sequences were related to unknown, unidentified, or uncharacterized bacterial cloned sequences MH - USA MH - Mexico|Sinaloa PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-0451 UR - ISI:000184575800008 L2 - hexavalent chromium reduction;marine sediments;metal analysis;metal-reducing bacteria;microbial community analysis;DISSIMILATORY METAL REDUCTION; HEXAVALENT CHROMIUM; CHROMATE REDUCTION; PURIFICATION; POLLUTION; ELEMENTS; CULTURE; REAGENT; AQUIFER; IRON SO - Geomicrobiology Journal 2003 ;20(4):389-401 7310 UI - 7931 AU - Arizmendi CM AU - Delgado J AU - Nunez-Yepez HN AU - Salas-Brito AL AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Mar Del Plata, Fac Ingn, Dept Fis, RA-7600 Mar Del Plata, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana Azcapotzalco, Lab Sistemas Dinam, Coyoacan 04000, DF, MexicoNunez-Yepez, HN, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Lagrangian description of the variational equations AB - A variant of the usual Lagrangian scheme is developed which describes both the equations of motion and the variational equations of a system. The required Lagrangian is defined in an extended configuration space comprising both the original configurations of the system and all the virtual displacements joining any two integral curves. After discussing certain features of the formulation, we introduce the so-called inherited constants of the motion and relate them to the Noether constants of the extended system. (C) 2003 Published by Elsevier Science Ltd MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000184142600013 L2 - LINEAR-STABILITY; SUPERINTEGRABILITY; PRINCIPLES; MECHANICS SO - Chaos Solitons & Fractals 2003 ;18(5):1065-1073 7311 UI - 8195 AU - Armenta R AU - Martinez AM AU - Chapman JW AU - Magallanes R AU - Goulson D AU - Caballero P AU - Cave RD AU - Cisneros J AU - Valle J AU - Castillejos V AU - Penagos DI AU - Garcia LF AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoUNACH, Fac Ciencias Agr, Huehuetan 30670, Chiapas, MexicoUniv Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainIACR Rothamsted, Plant & Invertebrate Ecol Div, Harpenden AL5 2JQ, Herts, EnglandUniv Southampton, Dept Biol, Southampton SO16 7PX, Hants, EnglandEscuela Agricola Panamer, El Zamorano, HondurasArmenta, R, ECOSUR, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Impact of a nucleopolyhedrovirus bioinsecticide and selected synthetic insecticides on the abundance of insect natural enemies on maize in Southern Mexico AB - The impact of commonly used organophosphate (chlorpyrifos, methamidophos), carbamate (carbaryl), and pyrethroid (cypermethrin) insecticides on insect natural enemies was compared with that of a nucleopolyhedrovirus (Baculoviridae) of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in maize grown in southern Mexico. Analyses of the SELECTV and Koppert Side Effects (IOBC) databases on the impact of synthetic insecticides on arthropod natural enemies were used to predict approximate to75-90% natural enemy mortality after application, whereas the bioinsecticide was predicted to have no effect. Three field trails were performed in mid- and late-whorl stage maize planted during the growing season in Chiapas State, Mexico. Synthetic insecticides were applied at product label recommended rates using a manual knapsack sprayer fitted with a cone nozzle. The biological pesticide was applied at a rate of 3 X 10(12) occlusion bodies (OBs)/ha using identical equipment. Pesticide impacts on arthropods on maize plants were quantified at intervals between I and 22 d postapplication. The biological insecticide based on S.frugiperda nucleopolyhedrovirus had no adverse effect on insect natural enemies or other nontarget insect populations. Applications of the carbamate, pyrethroid, and organophosphate insecticides all resulted in reduced abundance of insect natural enemies, but for a relatively short period (8-15 d). Pesticide applications made to late-whorl stage maize resulted in lesser reductions in natural enemy populations than applications made at the mid-whorl stage, probably because of a greater abundance of physical refuges and reduced spray penetration of late-whorl maize MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000183648000022 L2 - synthetic pesticides;baculovirus;maize;natural enemies;crop phenology;SPODOPTERA-FRUGIPERDA LEPIDOPTERA; NUCLEAR POLYHEDROSIS-VIRUS; FALL ARMYWORM; BACULOVIRUS BIOINSECTICIDE; NOCTUIDAE; PARASITOIDS; CANNIBALISM; PESTICIDES; LOUISIANA; NICARAGUA SO - Journal of Economic Entomology 2003 ;96(3):649-661 7312 UI - 7448 AU - Arreola J AU - Melvin JE AD - Univ Autonoma San Luis Potosi, San Luis Potosi 78290, MexicoUniv Rochester, Rochester, NY 14642, USA TI - Extracellular ATP activates a chloride channel in mouse parotid acinar cells MH - Mexico|San Luis Potosi MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123800418 SO - Biophysical Journal 2003 ;84(2):86A-86A 7313 UI - 7550 AU - Arreola J AU - Melvin JE AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Rochester, Ctr Oral Biol, Rochester, NY, USA TI - Nucleotide sensitivity of the ATP-activated chloride conductance in mouse parotid acinar cells MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Physiology U5 - J;Meeting Abstract AV - English IS - 0022-1295 UR - ISI:000184087600106 SO - Journal of General Physiology 2003 ;122(1):41A-41A 7314 UI - 8501 AU - Arriaga J AU - Knight JC AU - Russell PS AD - Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Puebla 72570, MexicoUniv Bath, Dept Phys, Optoelect Grp, Bath BA2 7AY, Avon, EnglandArriaga, J, Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Apartado Postal J-48, Puebla 72570, Mexico TI - Modelling photonic crystal fibres AB - One of the potential applications of photonic crystals is the so-called photonic crystal fibres. These systems can be constructed, for example, using a long thread of silica glass with a periodic array of airholes running down its length. If the central hole is absent, we generate a high-index "defect" in the repeating structure which acts like the core of an optical fibre. We study the propagation of light in these fibres. We solve the Maxwell equations using the plane wave expansion and the super cell method. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000182700700150 L2 - periodic structures;photonic crystal fibres;GUIDANCE; LIGHT SO - Physica E-Low-Dimensional Systems & Nanostructures 2003 ;17(1-4):440-442 7315 UI - 8142 AU - Arrieta A AU - Torres-Peimbert S AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoArrieta, A, Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA TI - Broad H alpha wings in nebulae around evolved stars and in young planetary nebulae AB - Eleven objects that have been reported as proto-planetary nebula or as young planetary nebulae that show very extended Halpha wings are presented. The extension of these wings is larger than 800 km s(-1). Data for two symbiotic stars that show this same characteristic are also presented. Raman scattering is the mechanism that best explains the wings in 10 of the PNe and in the two symbiotic stars. In the PN IRAS 20462+3416 the wing profile can be explained by very intense stellar wind MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000183700700004 L2 - binaries : symbiotic;line : profiles;planetary nebulae : general;scattering;stars : AGB and post-AGB;stars : mass loss;SYMBIOTIC STARS; ELECTRON-SCATTERING; RAMAN-SCATTERING; LINE-PROFILES; Z-ANDROMEDAE; EMISSION; SPECTRUM; SGE; CO; SPECTROPOLARIMETRY SO - Astrophysical Journal Supplement Series 2003 ;147(1):97-102 7316 UI - 7387 AU - Arroyo A AU - Bossi F AU - Finkelstein RR AU - Leon P AD - Univ Nacl Autonoma Mexico, Dept Biol Mol Plantas, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoUniv Calif Santa Barbara, Dept Mol Cellular & Dev Biol, Santa Barbara, CA 93106, USALeon, P, Univ Nacl Autonoma Mexico, Dept Biol Mol Plantas, Inst Biotecnol, Avenida Univ 2001 Chamilpa,Apartado Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - Three genes that affect sugar sensing (Abscisic Acid Insensitive 4, Abscisic Acid Insensitive 5, and Constitutive Triple Response 1) are differentially regulated by glucose in arabidopsis AB - Mutant characterization has demonstrated that ABI4 (Abscisic Acid [ABA] Insensitive 4), ABI5 (ABA Insensitive 5), and CTR1 (Constitutive Triple Response 1) genes play an important role in the sugar signaling response in plants. The present study shows that the transcripts of these three genes are modulated by glucose (Glc) independently of the developmental arrest caused by high Glc concentrations. ABI4 and ABI5 transcripts accumulate in response to sugars, whereas the CTR1 transcript is transiently reduced followed by a rapid recovery. The results of our kinetic studies on gene expression indicate that ABI4, ABI5, and CTR1 are regulated by multiple signals including Glc, osmotic stress, and ABA. However, the differential expression profiles caused by these treatments suggest that distinct signaling pathways are used for each signal. ABI4 and ABI5 response to the Glc analog 2-deoxy-Glc supports this conclusion. Glc regulation of ABI4 and CTR1 transcripts is dependent on the developmental stage. Finally, the Glc-mediated regulation of ABI4 and ABI5 is affected in mutants displaying Glc-insensitive phenotypes such as gins, abas, abi4, abi5, and ctr1 but not in abi1-1, abi2-1, and abi3-1, which do not show a Glc-insensitive phenotype. The capacity of transcription factors, like the ones analyzed in this work, to be regulated by a variety of signals might contribute to the ability of plants to respond in a flexible and integral way to continuous changes in the internal and external environment MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 20 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000185429700024 L2 - SNF1-RELATED PROTEIN-KINASES; ABA RESPONSE LOCI; ABSCISIC-ACID; SIGNAL-TRANSDUCTION; TRANSCRIPTION FACTOR; HIGHER-PLANTS; UNTRANSLATED REGION; INSENSITIVE MUTANTS; ALPHA-AMYLASE; EXPRESSION SO - Plant Physiology 2003 ;133(1):231-242 7317 UI - 7737 AU - Arroyo A AU - Hertz FR AD - Univ Nacl Autonoma Mexico, Unidad Curnavaca, Inst Matemat, Cuernavaca 62191, Morelos, MexicoIMERL, Fac Ingn, Montevideo, UruguayArroyo, A, Univ Nacl Autonoma Mexico, Unidad Curnavaca, Inst Matemat, AP 273 Admon Correos 3 CP 62251, Cuernavaca 62191, Morelos, Mexico TI - Homoclinic bifurcations and uniform hyperbolicity for three-dimensional flows AB - In this paper we prove that any C-1 vector field defined on a three-dimensional manifold can be approximated by one that is uniformly hyperbolic, or that exhibits either a homoclinic tangency or a singular cycle. This proves an analogous statement of a conjecture of Palis for diffeomorphisms in the context of C-1-flows on three manifolds. For that, we rely on the notion of dominated splitting for the associated linear Poincare flow. (C) 2003 Editions scientifiques et medicales Elsevier SAS MH - Mexico|Morelos MH - Uruguay PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 9 U4 - Mathematics, Applied U5 - J;Article AV - French IS - 0294-1449 UR - ISI:000184659300004 L2 - CLOSING LEMMA; DIFFEOMORPHISMS; STABILITY; SYSTEMS; SETS SO - Annales de l Institut Henri Poincare-Analyse Non Lineaire 2003 ;20(5):805-841 7318 UI - 9216 AU - Artalejo JR AU - Hernandez-Lerma O AD - Univ Complutense Madrid, Fac Matemat, Dept Estadist & IO, Madrid 28040, SpainInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoArtalejo, JR, Univ Complutense Madrid, Fac Matemat, Dept Estadist & IO, Madrid 28040, Spain TI - Performance analysis and optimal control of the Geo/Geo/c queue AB - Discrete-time multiserver queues have been used for many years to investigate the behavior of communication and computer systems in which time is slotted. In this paper, we consider the discrete-time Geo/Geo/c queue. We first develop an efficient recursive procedure to obtain the steady-state probabilities and prove the convergence to the continuous-time counterpart. We also deal with the infinite-horizon discounted cost criterion for the arrival and service rate control problems. Optimal stationary policies and value functions are determined. This allows us to compare both control problems. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Hardware & Architecture;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0166-5316 UR - ISI:000180923700002 L2 - discrete queues;multiple servers;optimal control;steady-state distribution SO - Performance Evaluation 2003 ;52(1):15-39 7319 UI - 7360 AU - Arulmani U AU - Kapoor K AU - Heiligers JPC AU - Willems EW AU - Doods H AU - Villalon CM AU - Saxena PR AD - Erasmus Med Ctr, Dept Pharmacol, Rotterdam, NetherlandsBoehringer Ingelheim Pharma KG, Biberach, GermanyIPN, CINVESTAV, Dept Pharmacobiol, Mexico City 07738, DF, Mexico TI - Effects of BIBN4096BS on cardiac output distribution and on calcitonin gene-related peptide (CGRP)-induced carotid haemodynamic changes in anaesthetised pigs MH - Germany MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0333-1024 UR - ISI:000185115000549 SO - Cephalalgia 2003 ;23(7):727-727 7320 UI - 7361 AU - Arulmani U AU - Kapoor K AU - Heiligers JPC AU - Willems EW AU - Doods H AU - Villalon CM AU - Saxena PR AD - Erasmus Med Ctr, Dept Pharmacol, Rotterdam, NetherlandsBoehringer Ingelheim Pharma KG, Biberach, GermanyIPN, CINVESTAV, Dept Pharmacobiol, Mexico City 07738, DF, Mexico TI - Effects of the CGRP antagonist BIBN4096BS on capsaicin-induced carotid haemodynamic changes in a porcine migraine model MH - Germany MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0333-1024 UR - ISI:000185115000557 SO - Cephalalgia 2003 ;23(7):729-730 7321 UI - 9061 AU - Ascencio JA AU - Perez-Alvarez M AU - Molina LM AU - Santiago P AU - Jose-Yacaman M AD - Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoInst Nacl Invest Nucl, Ocoyoacac 52045, MexicoUniv Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Texas, Dept Chem Engn, Austin, TX 78712, USAAscencio, JA, Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Lazaro Cardenas 152 Ductos,Apartado Postal 14-805, Mexico City 07730, DF, Mexico TI - Structural models of inorganic fullerene-like structures AB - in the study of fullerene-like structures, some of the more interesting systems are the inorganic cages, made of MoS2 (usually named inorganic fullerenes), which have many important potential applications as lubricant and catalysts. In the present work, we report calculations for structural models of closed cage of inorganic fullerene-like structures for Most system. Three cage shapes were found to be the most stable: triangular pyramid, octahedron and dodecahedron. High resolution TEM images of MoS2 cages structures were calculated to be compared with experimental data. Some examples of triangular pyramid and polyhedron in experimental MoS2 samples are presented. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000181211900005 L2 - fullerenes;sulphides;electron microscopy;surface structure, morphology, roughness, and topography;CAGE STRUCTURES; C-60; NANOTUBES SO - Surface Science 2003 ;526(3):243-247 7322 UI - 6939 AU - Ashtekar A AU - Corichi A AD - Penn State Univ, Ctr Gravitat Phys, University Pk, PA 16802, USAPenn State Univ, Geometry Phys Dept, University Pk, PA 16802, USAErwin Schrodinger Inst, A-1090 Vienna, AustriaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoAshtekar, A, Penn State Univ, Ctr Gravitat Phys, University Pk, PA 16802 USA TI - Non-minimal couplings, quantum geometry and black-hole entropy AB - The black-hole entropy calculation for type I isolated horizons, based on loop quantum gravity, is extended to include non-minimally coupled scalar fields. Although the non-minimal coupling significantly modifies quantum geometry, the highly non-trivial consistency checks for the emergence of a coherent description of the quantum horizon continue to be met. The resulting expression of black-hole entropy now depends also on the scalar field precisely in the fashion predicted by the first law in the classical theory (with the same value of the Barbero-Immirzi parameter as in the case of minimal coupling) MH - USA MH - Austria MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000186589100014 L2 - GENERIC ISOLATED HORIZONS; NOETHER CHARGE; GAUGE-THEORIES; GRAVITY; REPRESENTATIONS; CONNECTIONS; FIELD; SPACE SO - Classical and Quantum Gravity 2003 ;20(20):4473-4484 7323 UI - 7667 AU - Ashtekar A AU - Corichi A AU - Sudarsky D AD - Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAErwin Schrodinger Inst, A-1090 Vienna, AustriaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoAshtekar, A, Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Non-minimally coupled scalar fields and isolated horizons AB - The isolated horizon framework is extended to include non-minimally coupled scalar fields. As expected from the analysis based on Killing horizons, entropy is no longer given just by (a quarter of) the horizon area but also depends on the scalar field. In a subsequent paper these results will serve as a point of departure for a statistical mechanical derivation of entropy using quantum geometry MH - Austria MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000184926900012 L2 - BLACK-HOLE ENTROPY; GENERIC ISOLATED HORIZONS; HAIR; INCLUSION; VARIABLES; STABILITY; GEOMETRY; GRAVITY SO - Classical and Quantum Gravity 2003 ;20(15):3413-3425 7324 UI - 8913 AU - Assouli B AU - Srhiri A AU - Idrissi H AD - Inst Natl Sci Appl, Lab Physicochim Ind, F-69621 Villeurbanne, FranceUniv Ibn Tofail, Fac Sci, Lab Electrochim Etud Corros & Environm, Kenitra 14000, DF, MexicoIdrissi, H, Inst Natl Sci Appl, Lab Physicochim Ind, Bat Leonard Da Vinci,20 Av Albert Einstein, F-69621 Villeurbanne, France TI - Characterization and control of selective corrosion of alpha,beta '-brass by acoustic emission AB - Acoustic emission (AE) associated with electrochemical measurements (electrochemical impedance spectroscopy and polarization curves) are used to study the selective corrosion of alpha,beta'-brass in an ammonia buffer solution. AE reveals, in this work, three different populations of events during the corrosion of this alloy. The corrosion process was found to proceed via oxygen reduction following a diffusion-controlled mechanism and selective dissolution of alpha,beta'-brass was controlled by the zinc atoms diffusion through oxide film. The diffusion coefficient obtained for zinc in alpha,beta'-brass following Cottrell law is of the order of 9.28 x 10(-12) cm(2)/s. An equivalent circuit modelling the reactions taking place at the electrode/electrolyte interface was suggested. The analysis by X-ray diffraction of residual stresses, before and after corrosion, showed that the dezincification of metal produces two types of residual stresses: macro and microstresses. Their evolution correlates perfectly with the measured acoustic activity. These stresses are then the sources of AE. This shows the important potential of AE in the detection and the control of selective corrosion phenomena. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0963-8695 UR - ISI:000181585800007 L2 - brass;dezincification;acoustic emission;residual stresses;ABRASION-CORROSION; TENSILE-STRESS; ALPHA-BRASS; COPPER; ALLOYS; DISSOLUTION; BEHAVIOR; CRACKING; SUSCEPTIBILITY; ALUMINUM SO - Ndt & e International 2003 ;36(2):117-126 7325 UI - 9291 AU - Atakishiyev NM AU - Pogosyan GS AU - Wolf KB AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62251, Morelos, MexicoYerevan State Univ, Russia & Int Ctr Adv Studies, Yerevan, ArmeniaJoint Nucl Res Inst, Theoret Phys Lab, Dubna 141980, RussiaAtakishiyev, NM, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Contraction of the finite one-dimensional oscillator AB - The finite oscillator model of 2j + 1 points has the dynamical algebra u(2), consisting of position, momentum and mode number. It is a paradigm of finite quantum mechanics where a sequence of finite unitary models contract to the well-known continuum theory. We examine its contraction as the number and density of points increase. This is done on the level of the dynamical algebra, of the Schrodinger difference equation, the (Kravchuk) wave functions, and the Fourier-Kravchuk transformation between position and momentum representations MH - Armenia MH - Mexico|Morelos MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000180639300007 L2 - finite quantum mechanics;contraction of Lie algebras;Kravchuk polynomials;Wigner d-functions;WIGNER DISTRIBUTION FUNCTION; 2-DIMENSIONAL OSCILLATOR; HARMONIC-OSCILLATOR; FOURIER-TRANSFORM; LIE-ALGEBRAS; SYSTEMS; SEPARATION; VARIABLES; EQUATION; STATES SO - International Journal of Modern Physics A 2003 ;18(2):317-327 7326 UI - 9292 AU - Atakishiyev NM AU - Pogosyan GS AU - Wolf KB AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62210, Morelos, MexicoYerevan State Univ, Int Ctr Adv Studies, Yerevan, ArmeniaJoint Nucl Res Inst, Theoret Phys Lab, Dubna 141980, RussiaAtakishiyev, NM, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Contraction of the finite radial oscillator AB - The finite radial oscillator model, introduced in [J. Phys. A34, 9399-9415 (2001)], is based on the precontracted dynamical algebra so(4), consisting of two position and two momentum operators, total mode number and angular momentum, all with a finite number of eigenvalues. We examine the contraction of this model to the ordinary radial quantum oscillator as the number and density of points increase. This is done on the level of the dynamical algebra, of the Schrodinger difference equation, and of the wave functions MH - Armenia MH - Mexico|Morelos MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000180639300008 L2 - finite quantum mechanics;contraction of Lie algebras;Hahn polynomials;Clebsch-Gordon coefficients;2-DIMENSIONAL OSCILLATOR; SEPARATION; VARIABLES; SPHERE; MODEL SO - International Journal of Modern Physics A 2003 ;18(2):329-341 7327 UI - 8680 AU - Atkins AJ AU - Black D AU - Finn RL AU - Marin-Becerra A AU - Blake AJ AU - Ruiz-Ramirez L AU - Li WS AU - Schroder M AD - Univ Nottingham, Dept Chem, Nottingham NG7 2RD, EnglandUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04105, DF, MexicoSchroder, M, Univ Nottingham, Dept Chem, Univ Pk, Nottingham NG7 2RD, England TI - Synthesis and structure of mononuclear and binuclear zinc(II) compartmental macrocyclic complexes AB - The structures of four neutral binuclear Zn-II complexes of the Schiff-base macrocycles formed by the [2 + 2] template condensation of 2,6-diformyl-4-methylphenol with 1,2-diaminoethane: [H2L1], 1,3-diaminopropane: [H2L2], 1,4-diaminobutane: [H2L3] and 2,6-diacetyl-4-methylphenol with 1,2-diaminoethane: [H2L4] have been determined. The complexes [Zn-2(L-1)(OAc)(2)].2CHCl(3),[Zn-2(L-2)(OAc)(2)].2CHCl(3) and [Zn-2(L-4)Cl-2] each contain two five coordinate Zn-II centres with each metal ion bound to the N2O2 donor set of the macrocyclic ligand and to an anion molecule. Two different coordination environments are observed in [Zn-2(L-3)(mu-OAc)(OAc)].CHCl3 which contains both a five- and a six-coordinate Zn-II centre, with one acetate bridging two metal ions and a monodentate acetate bound to the six-coordinate Zn-II ion. Significantly, the reaction of pre-formed macrocyclic ligands [H4L2](PF6)(2) and [H4L4](PF6)(2) with Zn(OAc)(2).2H(2)O affords [Zn-2(L-2)(mu-OAc)](PF6).MeCN and [Zn(H2L4)(MeCN)](PF6)(2), respectively. The former shows two five-coordinate Zn-II centres in which an acetate bridges both metal ions. In the latter complex the macrocyclic ligand binds only one five-coordinate Zn-II ion with a molecule of MeCN bound at an apical position MH - United Kingdom MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1477-9226 UR - ISI:000182316100011 L2 - OCTAHEDRAL NICKEL(II) IONS; CRYSTAL-STRUCTURE; DICOPPER(II) COMPLEXES; DISSIMILAR 4-COORDINATION; DINUCLEATING MACROCYCLE; COPPER(II) COMPLEXES; 5-COORDINATION SITES; METAL-COMPLEXES; ZN COMPLEXES; RING SIZE SO - Dalton Transactions 2003 ;(9):1730-1737 7328 UI - 6652 AU - Atteia A AU - van Lis R AU - Mendoza-Hernandez G AU - Henze K AU - Martin W AU - Riveros-Rosas H AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoUniv Dusseldorf, Inst Bot, D-40225 Dusseldorf, GermanyUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoAtteia, A, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, Mexico TI - Bifunctional aldehyde/alcohol dehydrogenase (ADHE) in chlorophyte algal mitochondria AB - Protein profiles of mitochondria isolated from the heterotrophic chlorophyte Polytomella sp. grown on ethanol at pH 6.0 and pH 3.7 were analyzed by Blue Native and denaturing polyacrylamide gel electrophoresis. Steady-state levels of oxidative phosphorylation complexes were influenced by external pH. Levels of an abundant, soluble, mitochondrial protein of 85 kDa and its corresponding mRNA increased at pH 6.0 relative to pH 3.7. N-terminal and internal sequencing of the 85 kDa mitochondrial protein together with the corresponding cDNA identified it as a bifunctional aldehyde/alcohol dehydrogenase (ADHE) with strong similarity to homologues from eubacteria and amitochondriate protists. A mitochondrial targeting sequence of 27 amino acids precedes the N-terminus of the mature mitochondrial protein. A gene encoding an ADHE homologue was also identified in the genome of Chlamydomonas reinhardtii, a photosynthetic relative of Polytomella. ADHE reveals a complex picture of sequence similarity among homologues. The lack of ADHE from archaebacteria indicates a eubacterial origin for the eukaryotic enzyme. Among eukaryotes, ADHE has hitherto been characteristic of anaerobes since it is essential to cytosolic energy metabolism of amitochondriate protists such as Giardia intestinalis and Entamoeba histolytica. Its abundance and expression pattern suggest an important role for ADHE in mitochondrial metabolism of Polytomella under the conditions studied. The current data are compatible with the view that Polytomella ADHE could be involved either in ethanol production or assimilation, or both, depending upon environmental conditions. Presence of ADHE in an oxygen-respiring algal mitochondrion and co-expression at ambient oxygen levels with respiratory chain components is unexpected with respect to the view that eukaryotes acquired ADHE genes specifically as an adaptation to an anaerobic lifestyle MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0167-4412 UR - ISI:000187356900014 L2 - chlorophytes;evolution;OXPHOS complexes;pH regulation;PYRUVATE-FORMATE-LYASE; CLOSTRIDIUM-ACETOBUTYLICUM ATCC-824; ESCHERICHIA-COLI; ENTAMOEBA-HISTOLYTICA; ALCOHOL-DEHYDROGENASE; MOLECULAR CHARACTERIZATION; CHLAMYDOMONAS-REINHARDTII; CHLOROGONIUM-ELONGATUM; SALMONELLA-TYPHIMURIUM; PROTEIN COMPLEXES SO - Plant Molecular Biology 2003 ;53(1):175-188 7329 UI - 8918 AU - Atteia A AU - van Lis R AU - Wetterskog D AU - Gutierrez-Cirlos EB AU - Ongay-Larios L AU - Franzen LG AU - Gonzalez-Halphen D AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoUniv Gothenburg, Dept Plant Physiol, SE-40530 Gothenburg, SwedenDartmouth Coll Sch Med, Dept Biochem, Hanover, NH 03755, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Unidad Biol Mol, Mexico City 04510, DF, MexicoUniv Halmstad, Sch Business & Econ, SE-30118 Halmstad, SwedenGonzalez-Halphen, D, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-243, Mexico City 04510, DF, Mexico TI - Structure, organization and expression of the genes encoding mitochondrial cytochrome c(1) and the Rieske iron-sulfur protein in Chlamydomonas reinhardtii AB - The sequence and organization of the Chlamydomonas reinhardtii genes encoding cytochrome c(1) (Cyc1) and the Rieske-type iron-sulfur protein ( Isp), two key nucleus-encoded subunits of the mitochondrial cytochrome bc(1) complex, are presented. Southern hybridization analysis indicates that both Cyc1 and Isp are present as single-copy genes in C. reinhardtii. The Cyc1 gene spans 6404 by and contains six introns, ranging from 178 to 1134 by in size. The Isp gene spans 1238 by and contains four smaller introns, ranging in length from 83 to 167 bp. In both genes, the intron/exon junctions follow the GT/AG rule. Internal conserved sequences were identified in only some of the introns in the Cyc1 gene. The levels of expression of Isp and Cyc1 genes are comparable in wild-type C. reinhardtii cells and in a mutant strain carrying a deletion in the mitochondrial gene for cytochrome b (dum-1). Nevertheless, no accumulation of the nucleus-encoded cytochrome c(1) or of core proteins I and II was observed in the membranes of the respiratory mutant. These data show that, in the green alga C. reinhardtii, the subunits of the cytochrome bc(1) complex fail to assemble properly in the absence of cytochrome b MH - Mexico|Distrito Federal MH - Sweden MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1617-4615 UR - ISI:000181616000008 L2 - expression of nucleus-encoded genes;introns;internal conserved sequences;mitochondrial targeting sequences;assembly of protein complexes;ALGA; POLYTOMELLA; IDENTIFICATION; PRESEQUENCE; SEQUENCE; MUTANT; TRANSFORMATION; DEFICIENT; PRECURSOR; COMPLEX SO - Molecular Genetics and Genomics 2003 ;268(5):637-644 7330 UI - 6288 AU - Atzori M AU - Kanold P AU - Pineda JC AU - Flores-Hernandez J AD - Blanchette Rockefeller Neurosci Inst, Rockville, MD 20850, USAHarvard Univ, Sch Med, Dept Neurobiol, Boston, MA 02115, USACtr Invest Reg Hideyo Noguchi, Marida 97135, Yucatan, MexicoBenemerita Univ Autonoma Puebla, Inst Fisiol, Puebla 72000, MexicoAtzori, M, Blanchette Rockefeller Neurosci Inst, Rockville, MD 20850 USA TI - Dopamine-acetylcholine interactions in the modulation of glutamate release MH - Mexico|Puebla MH - Mexico|Yucatan MH - USA PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - S;Article AV - English IS - 0077-8923 UR - ISI:000188893500027 L2 - dopamine;acetylcholine;glutamate;cortex;schizophrenia;brain slice;patch-clamp;SYNAPTIC-TRANSMISSION; RECEPTORS; SCHIZOPHRENIA; NEURONS SO - Glutamate and Disorders of Cognition and Motivation 2003 ;1003():346-348 7331 UI - 8516 AU - Auger JC AU - Barrera RG AU - Stout B AD - Ctr Invest Polimeros, Grp COMEX, Mexico City 11560, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCtr St Jerome, Fac Sci & Tech, UMR 6133, Inst Fresnel, F-13397 Marseille, FranceAuger, JC, Ctr Invest Polimeros, Grp COMEX, Blvd Manuel Avila Camache 138,Lomas Chapultepec, Mexico City 11560, DF, Mexico TI - Scattering efficiency of clusters composed by aggregated spheres AB - We present a detailed study of the variation of the average scattering cross section of various aggregates of titanium dioxide crystallites as a function of their sizes and shapes. To perform the analysis, we use a recursive T-matrix algorithm that we developed. We show how the aggregation phenomenon can tremendously decrease the local scattering properties of a white paint film and consequently affects its hiding power. We also compare the results with the equivalent spherical volume approximation which is used in particle size analysis using static or dynamic light-scattering methods. We show how the equivalent volume approximation used in those methods should be handled with care. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Spectroscopy U5 - J;Article AV - English IS - 0022-4073 UR - ISI:000182647500004 L2 - multiple-scattering;aggregate;T-matrix;ELECTROMAGNETIC SCATTERING SO - Journal of Quantitative Spectroscopy & Radiative Transfer 2003 ;79():521-531 7332 UI - 8517 AU - Auger JC AU - Stout B AD - Ctr Invest Polimeros, Grp COMEX, Mexico City 11560, DF, MexicoCtr St Jerome, Fac Sci & Tech, UMR 6133, Inst Fresnel, F-13397 Marseille 20, FranceAuger, JC, Ctr Invest Polimeros, Grp COMEX, Blv M A Camacho 138,Lomas Chapultepec, Mexico City 11560, DF, Mexico TI - A recursive centered T-matrix algorithm to solve the multiple scattering equation: numerical validation AB - The multiple scattering problem can be solved using various analytical techniques. One of these techniques, the T-matrix formalism, is at the present time generally solved using iterative algorithms, because the initially proposed recursive algorithms appeared to be numerically unstable. We present here a new set of recursive relations to solve the multiple scattering equation, and discuss their range of application. In order to validate this new formalism, we compare numerical results for various complex systems with the Generalized Multi-particle Mie solution. We show that the results obtained with the recursive method are in very good agreement with those given by iterative techniques. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Spectroscopy U5 - J;Article AV - English IS - 0022-4073 UR - ISI:000182647500005 L2 - multiple-scattering;T-matrix;recursive algorithm;ELECTROMAGNETIC SCATTERING; CROSS-SECTIONS; SPHERES; PARTICLES; AGGREGATE SO - Journal of Quantitative Spectroscopy & Radiative Transfer 2003 ;79():533-547 7333 UI - 8087 AU - Auger MA AU - Sanchez O AU - Ballesteros C AU - Jergel M AU - guilar-Frutis M AU - Falcony C AD - CSIC, Inst Ciencia Mat Madrid, Madrid, SpainUniv Carlos III Madrid, Dept Fis, Madrid, SpainIPN, CINVESTAV, Dept Fis, Mexico City, DF, MexicoSlovak Acad Sci, Inst Phys, Bratislava, SlovakiaIPN, CICATA, Mexico City 11500, DF, MexicoAuger, MA, CSIC, Inst Ciencia Mat Madrid, Plaza Murillo 2, Madrid, Spain TI - TiN/AIN bilayers and multilayers grown by magnetron co-sputtering AB - TiN/AlN bilayers and multilayers were deposited on (100) silicon substrates using reactive magnetron sputtering technique. These combined coatings are known to possess high hardness and wear resistance, hence, their structural and mechanical properties were investigated. X-Ray diffraction, transmission electron microscopy, atomic force microscopy, spectroscopic ellipsometry and nanoindenter measurements were applied to characterise the films. The bilayer hardness increases with the individual layer thickness ratio approaching unity and further enhancement was obtained in the multilayers. The enhanced hardness seems to be related to a dislocation blocking effect at the interfaces which is promoted by the hexagonal (002) and cubic (I 11) textures found in AlN and TiN layers, respectively. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183716900038 L2 - reactive sputtering;titanium nitride;aluminium nitride;multilayers;THIN-FILMS; PREFERRED ORIENTATION; HARD COATINGS; SUPERLATTICES; DEPOSITION; SUBSTRATE SO - Thin Solid Films 2003 ;433(1-2):211-216 7334 UI - 8197 AU - Avila G AU - Lee EH AU - Perez CF AU - Allen PD AU - Dirksen RT AD - Univ Rochester, Sch Med & Dent, Dept Physiol & Pharmacol, Rochester, NY 14642, USAInst Politecn Nacl, CINVESTAV, Dept Biochem, Mexico City 07000, DF, MexicoKwangju Inst Sci & Technol, Dept Life Sci, Kwangju 500712, South KoreaHarvard Univ, Sch Med, Brigham & Womens Hosp, Dept Anesthesia Pain & Perioperat Med, Boston, MA 02115, USADirksen, RT, Univ Rochester, Sch Med & Dent, Dept Physiol & Pharmacol, 601 Elmwood Ave, Rochester, NY 14642 USA TI - FKBP12 binding to RyR1 modulates excitation-contraction coupling in mouse skeletal myotubes AB - The skeletal muscle sarcoplasmic reticulum (SR) Ca2+ release channel or ryanodine receptor (RyR1) binds four molecules of FKBP12, and the interaction of FKBP12 with RyR1 regulates both unitary and coupled gating of the channel. We have characterized the physiologic effects of previously identified mutations in RyR1 that disrupt FKBP12 binding (V2461G and V2461I) on excitation-contraction (EC) coupling and intracellular Ca2+ homeostasis following their expression in skeletal myotubes derived from RyR1-knockout (dyspedic) mice. Wild-type RyR1-, V246I-, and V2461G-expressing myotubes exhibited similar resting Ca2+ levels and maximal responses to caffeine (10 mM) and cyclopiazonic acid (30 muM). However, maximal voltage-gated Ca2+ release in V2461G-expressing myotubes was reduced by similar to50% compared with that attributable to wild-type RyR1 (DeltaF/F-max = 1.6 +/- 0.2 and 3.1 +/- 0.4, respectively). Dyspedic myotubes expressing the V2461I mutant protein, that binds FKBP12.6 but not FKBP12, exhibited a comparable reduction in voltage- gated SR Ca2+ release (DeltaF/F-max = 1.0 +/- 0.1). However, voltage- gated Ca2+ release in V2461I-expressing myotubes was restored to a normal level (DeltaF/F-max = 2.9 +/- 0.6) following co-expression of FKBP12.6. None of the mutations that disrupted FKBP binding to RyR1 significantly affected RyR1- mediated enhancement of L-type Ca2+ channel activity (retrograde coupling). These data demonstrate that FKBP12 binding to RyR1 enhances the gain of skeletal muscle EC coupling MH - Mexico|Distrito Federal MH - USA MH - South Korea PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000183503900058 L2 - CHANNEL RYANODINE RECEPTOR; CALCIUM-RELEASE CHANNEL; II-III LOOP; MYOGENIC CELL-LINE; FK506-BINDING PROTEIN; CA2+ RELEASE; INOSITOL 1,4,5-TRISPHOSPHATE; DIHYDROPYRIDINE RECEPTOR; MUSCLE FIBERS; SARCOPLASMIC-RETICULUM SO - Journal of Biological Chemistry 2003 ;278(25):22600-22608 7335 UI - 8724 AU - Avila G AU - O'Connell KMS AU - Dirksen RT AD - Univ Rochester, Dept Pharmacol & Physiol, Sch Med & Dent, Rochester, NY 14642, USACINVESTAV, Dept Biochem, IPN, Mexico City 07360, DF, MexicoColorado State Univ, Dept Biomed Sci, Ft Collins, CO 80523, USADirksen, RT, Univ Rochester, Dept Pharmacol & Physiol, Sch Med & Dent, 601 Elmwood Ave, Rochester, NY 14642 USA TI - The pore region of the skeletal muscle ryanodine receptor is a primary locus for excitation-contraction uncoupling in central core disease AB - Human central core disease (CCD) is caused by mutations/deletions in the gene that encodes the skeletal muscle ryanodine receptor (RyR1). Previous studies have shown that CCD mutations in the NH2-terminal region of RyRl lead to the formation of leaky SR Ca2+ release channels when expressed in myotubes derived from RyR1-knockout (dyspedic) mice, whereas a COOH-terminal mutant (14897T) results in channels that are not leaky to Ca2+ but lack depolarization-induced Ca2+ release (termed excitation-contraction [EC] uncoupling). We show here that store depletion resulting from NH2-terminal (Y523S) and COOH-terminal (Y4795C) leaky CCD mutant release channels is eliminated after incorporation of the 14897T mutation into the channel (Y523S/I4897T and Y4795C/I4897T). In spite of normal SR Ca2+ content, myotubes expressing the double mutants lacked voltage-gated Ca2+ release and thus exhibited an EC uncoupling phenotype similar to that of 14897T expressing myotubes. We also show that dyspedic myotubes expressing each of seven recently identified CCD mutations located in exon 102 of the RyR1 gene (G4890R, R4892W 14897T, G4898E, G4898R, A4905V, R4913G) behave as EC-uncoupled release channels. Interestingly, voltage-gated Ca2+ release was nearly abolished (reduced similar to90%) while caffeine-induced Ca2+ release was only marginally reduced in R4892W expressing myotubes, indicating that this mutation preferentially disrupts voltage-sensor activation of release. These data demonstrate that CCD mutations in exon 102 disrupt release channel permeation to Ca2+ during EC coupling and that this region represents a primary molecular locus for EC uncoupling in CCD MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 27 U4 - Physiology U5 - J;Article AV - English IS - 0022-1295 UR - ISI:000182141100002 L2 - excitation-contraction coupling;skeletal muscle;calcium channel;muscle disease;CA2+ RELEASE; MALIGNANT HYPERTHERMIA; CHANNEL; MUTATIONS; EXPRESSION; DANTROLENE; FIBERS; DOMAIN SO - Journal of General Physiology 2003 ;121(4):277-286 7336 UI - 8074 AU - Aviles C AU - Loza-Tavera H AU - Terry N AU - Moreno-Sanchez R AD - Inst Nacl Cardiol, Secc 16, Tlalpan 14080, DF, MexicoInst Nacl Cardiol, Dept Bioquim, Tlalpan 14080, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Bioquim & Biol Mol Plantas, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720, USAUNAM, Fac Estudios Super Iztacala, Unidad Biomed, Los Reyes Iztacala 54090, Tlalnepantla, MexicoMoreno-Sanchez, R, Inst Nacl Cardiol, Secc 16, Juan Badiano 1, Tlalpan 14080, DF, Mexico TI - Mercury pretreatment selects an enhanced cadmium-accumulating phenotype in Euglena gracilis AB - Pre-treatment of heterotrophic cultures of Euglena gracilis with 1.5 muM HgCl2 for at least 60 generations resulted in a cell population that showed both increased resistance to Cd2+ and ability to accumulate it, when compared to non-Hg2+-pretreated Euglena. These Hg2+-enhanced capacities were evident in cells cultured in the dark in a medium with lactate, but not in cells cultured with glutamate plus malate. After culturing with 0.1 mM CdCl2 through three consecutive transfers, the mercury-pretreated cells still grew and maintained high levels of glutathione-related metabolites, while the non-Hg2+-pretreated cells died. Cultures of Hg2+-pretreated cells, after transfer to media with or without cadmium, did not alter either their enhanced Cd2+ accumulation or their increased production of glutathione-related metabolites. These observations suggested that the Hg2+-pretreated population underwent a permanent change that improved its Cd2+ resistance. Several factors that contributed to the improved capacities included: (a) higher cellular malate, cysteine and glutathione levels induced by Hg2+ before and after Cd2+ exposure; and (b) increased storage of Cd2+ in mitochondria along with increased intramitochondrial citrate, cysteine, and glutathione levels. These characteristics suggested that this Cd2+ hyper-accumulating strain of E. gracilis might be a suitable candidate for Cd2+-bioremediation of polluted water systems MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000183822800001 L2 - Euglena gracilis;Hg2+ pretreatment;Cd2+ resistance;Cd2+compartmentation;Cd2+hyperaccumulation;phytochelatins;mitochondria;GAMMA-GLUTAMYLCYSTEINE SYNTHETASE; HEAVY-METALS; PHYTOCHELATIN SYNTHESIS; FISSION YEAST; GLUTATHIONE; TOLERANCE; TRANSPORT; PEPTIDES; PLANTS; ROOTS SO - Archives of Microbiology 2003 ;180(1):1-10 7337 UI - 8129 AU - Aviles F AU - Letley DP AU - Gonzales G AU - Torres J AU - Atherton JC AD - Univ Nottingham, Div Gastroenterol, Nottingham NG7 2RD, EnglandUniv Nottingham, Inst Infect & Immun, Nottingham NG7 2RD, EnglandIMSS, Mexico City, DF, Mexico TI - Evolution of the Helicobacter pylori vacA toxin by recombination in vivo MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000181828800064 SO - Gut 2003 ;52():A17-A17 7338 UI - 9313 AU - Aviles F AU - Oliva AI AU - Aznarez JA AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Unidad Merida, Merida 97310, MexicoCSIC, Inst Fis Aplicada, E-28006 Madrid, SpainAviles, F, IPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Unidad Merida, AP 73 Cordemex, Merida 97310, Mexico TI - Dynamical thermal model for thin metallic film-substrate system with resistive heating AB - In this paper the dynamical thermal behavior of the thin metallic film-substrate system is theoretically and experimentally discussed. The thin film-substrate system is considered as a bimaterial and the heat source used is the Joule effect on the metallic film when an electrical current is applied through the film. In order to obtain a physical picture of the temporal distribution of temperature on the film and substrate, a dynamic thermal model is proposed. This model has the feasibility to predict the temperature profile on the film and substrate, and to describe the dependence of geometrical, environmental, and material parameters of the system, on its thermal response. Experimental measurements on gold/glass and Al/Si(100) systems were performed and compared with the proposed model. The bimaterial thermal model proposed reproduces our experimental results with high accuracy. The model can be readily extended to study any kind of bimaterial system. The model is also appropriate to study multilayer thin film solar cells and to estimate thermal conditions on microelectromechanic (MEM) devices. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Yucatan MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000180807900037 L2 - thermal behavior;thin metallic film;bimaterial;Joule effect;film-substrate system;resistive heating;DEFORMATION SO - Applied Surface Science 2003 ;206(1-4):336-344 7339 UI - 7754 AU - Ayala A AU - Magnin J AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCtr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilAyala, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - rho propagation and dilepton production at finite pion density and temperature AB - We study the propagation properties of the rho vector in a dense and hot pion medium. We introduce a finite value of the chemical potential associated with a conserved pion number and argue that such description is valid during the hadronic phase of a relativistic heavy-ion collision, between chemical and thermal freeze-out, where the strong interaction drives pion number to a fixed value. By invoking vector dominance and rho saturation, we also study the finite pion density effects into the low mass dilepton production rate. We find that the distribution moderately widens and the position of the peak shifts toward larger values of the pair invariant mass, at the same time that the height of the peak decreases when the value of the chemical potential grows. We conclude by arguing that for the description of the dilepton spectra at ultrarelativistic energies, such as those of Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC), the proper treatment of the large pion density might be a more important effect to consider than the influence of a finite baryon density MH - Brazil MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000184616100050 L2 - NUCLEUS-NUCLEUS COLLISIONS; HEAVY-ION COLLISIONS; EQUILIBRATION; MODEL SO - Physical Review C 2003 ;68(1): 7340 UI - 7751 AU - az-Cruz JL AU - Ghosh DK AU - Moretti S AD - BUAP, Inst Fis, Puebla 72570, MexicoUniv Oregon, Inst Theoret Sci, Eugene, OR 97403, USAUniv Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandDiaz-Cruz, JL, BUAP, Inst Fis, Puebla 72570, Mexico TI - Diphoton signature of Higgs bosons in gauge mediated supersymmetry breaking models at the CERN LHC AB - We show how the well studied gammagamma inclusive Higgs signal can be used at the CERN Large Hadron Collider to test gauge mediated supersymmetry breaking scenarios in which a rather heavy Higgs boson decays into two light neutralinos, the latter yielding two photons and missing (transverse) energy MH - United Kingdom MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000184583700038 L2 - RADIATIVE NEUTRALINO DECAY; UPDATE SO - Physical Review D 2003 ;68(1): 7341 UI - 6905 AU - az-Flores LL AU - Horley PP AU - Gonzalez-Hernandez J AU - Perez-Bueno JJ AU - Vorobiev YV AU - Gorley PM AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Juriquilla 76230, Queretaro, MexicoChernivtsi Natl Univ, Dept Phys Elect, UA-58012 Chernovtsy, UkraineVorobiev, YV, Ctr Univ, CINVESTAV, IPN, Lab Invest & Mat, Cerro Campanas S-N, Queretaro 76010, Mexico TI - Molecular aggregation and shape effects in the optical spectra of organic dye molecules in SiO2 and SiO2-PMMA matrices AB - The electronic spectra of four different types of organic colorants embedded into sol-gel SiO2 xerogel or into a hybrid SiO2-PMMA matrix were studied experimentally using optical absorption, photoluminescence excitation, emission techniques, atomic force microscopy and fluorescence microscopy. The results show a well defined set of energy levels for each type of dye. It turns out that the type of matrix and the degree of aggregation of the organic molecules have relatively small effects on the energy spectra, although they have a strong influence on the optical absorption of the material. A quantum mechanical description of the electronic spectra of these molecules was developed on the basis of free electron molecular orbitals approach. For that the molecule is considered as a two-dimensional potential well, using both periodic (Born-von Karman) boundary conditions to take into account aggregation effects, and the commonly used infinite wall conditions. The results obtained have a good agreement with experimental spectra without adjustable parameters. A new simple method to calculate the energy spectra of and electron in a two-dimensional potential well is proposed. For that, it has been considered the electron motion in a 'box' with reflecting walls, giving us a result identical to the classical model for rectangular-shaped molecules. This method also allows us to treat the triangular-shaped molecules, the results obtained being in a reasonable agreement with experiment, also without any adjustable parameters. (C) 2003 Published by Elsevier Ltd MH - Mexico|Queretaro MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000186575700015 L2 - nano structures;optical properties;SOL-GEL METHOD; THIN-FILMS; RHODAMINE-B; SILICA; GLASSES; PHOTOSTABILITY; FLUORESCENCE; BEHAVIOR; LASER; CAGE SO - Journal of Physics and Chemistry of Solids 2003 ;64(12):2409-2415 7342 UI - 8122 AU - az-Flores LL AU - Perez-Robles JF AU - Vorobiev P AU - Horley PP AU - Zakharchenko RV AU - Gonzalez-Hernandez J AU - Vorobiev YV AD - IPN, CINVESTAV, Unidad Queretaro, Queretaro 76001, Qro, MexicoUniv Autonoma Queretaro, Fac Ingn, Queretaro 76010, Qro, MexicoNatl Tech Univ, Dept Phys, Kiev, UkraineDiaz-Flores, LL, IPN, CINVESTAV, Unidad Queretaro, Apdo Postal 1-798, Queretaro 76001, Qro, Mexico TI - Structure and optical properties of nanocomposites prepared by the incorporation of organic dyes into a SiO2 and SiO2-PMMA glassy matrix AB - Electronic spectra of nine different types of organic colorants embedded in three different matrices (sol-gel SiO2, PMMA, and SiO2-PMMA) were studied experimentally with the use of optical absorption, photoluminescence excitation, and emission techniques, as well as fluorescent microscopy and atomic force microscopy. We found a distinct set of energy levels for each type of dye. The type of matrix and the degree of aggregation of the organic molecules have relatively small effects on the spectra, although their influence on the optical density of the material is essential. The character of the energy spectra is mainly related with the shape of the dye molecule. A quantum mechanical description of the electronic spectra of these molecules was made on the basis of the free electron molecular orbitals approach. The molecules were considered as two-dimensional potential wells with different shapes. The effect of boundary conditions on the energy spectra was studied. The direct solution of the Schrodinger equation shows a good theory-experiment correlation MH - Mexico|Queretaro MH - Ukraine PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0020-1685 UR - ISI:000183794000017 L2 - SOL-GEL METHOD; SILICA-GEL; THIN-FILMS; LASER; PHOTOSTABILITY; PMMA; CAGE SO - Inorganic Materials 2003 ;39(6):631-639 7343 UI - 8943 AU - az-Garcia JA AU - Rojas MG AU - Leiva-Sanchez V AD - Univ Autonoma Agr Antonio Narro, Dept Stat & Computat, Saltillo, Coahuila, MexicoUniv Valparaiso, Dept Stat, Valparaiso, Chile TI - Influence diagnostics for elliptical multivariate linear regression models AB - In this paper we present various diagnostic methods for elliptical multivariate regression models. We show that the expressions, and consequently the distribution of some usual standardized residuals, are invariant in the class of Elliptical models. This invariance is also verified for some influence measures of dropping observations, such as the Cook's distance. We also discuss the computation of the likelihood displacement as well as the normal curvature in the local influence method. An example with real data is given for illustration MH - Chile MH - Mexico|Coahuila PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 5 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0361-0926 UR - ISI:000181660300007 L2 - elliptical distributions;influence diagnostic;local influence;multivariate regression;LOCAL INFLUENCE SO - Communications in Statistics-Theory and Methods 2003 ;32(3):625-641 7344 UI - 9184 AU - az-Garcia JA AU - Leiva-Sanchez V AD - Univ Autonoma Agraria Antonio Narro, Dept Stat & Computat, Saltillo 25350, Coahuila, MexicoUniv Valparaiso, Dept Stat, Valparaiso, Chile TI - Doubly non-central t and F distributions obtained under singular and non-singular elliptic distributions AB - We find in this article the densities of the generalized doubly noncentral t and T distributions, under singularity and non-singularity of the Elliptic distribution associated. These results are applied to the Pearson Type VII and Normal distributions MH - Chile MH - Mexico|Coahuila PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0361-0926 UR - ISI:000181001600002 L2 - singular and non-singular elliptic distributions;generalized doubly non-central t and F distributions SO - Communications in Statistics-Theory and Methods 2003 ;32(1):11-32 7345 UI - 6972 AU - az-Garcia M AU - Garcia-Sanchez G AU - Martinez-Coria E AU - Santillan-Chapa CG AU - Martinez-Cruz CF AU - Moreno-Aguirre J AD - CNR, Ctr Nacl Rehabil, Inst Commun Humana, Dept Genet, Mexico City, DF, MexicoCNR, Dept Tomografia, I-00185 Rome, ItalyCNR, Dept Rehabil Pediat, I-00185 Rome, ItalyInst Nacl Perinatol, Serv Commun Humana, Depto Seguimiento Pediat, Mexico City, DF, Mexico TI - Wildervanck syndrome. Clinical and radiological finding MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599700518 SO - American Journal of Human Genetics 2003 ;73(5):258-258 7346 UI - 8848 AU - az-Perez JC AU - Bautista S AU - Villanueva R AU - Lopez-Gomez R AD - Univ Georgia, Coastal Plain Expt Stn, Dept Hort, Tifton, GA 31793, USANatl Polytech Inst, CEPROBI, Yautepec 62730, Morelos, MexicoDiaz-Perez, JC, Univ Georgia, Coastal Plain Expt Stn, Dept Hort, Tifton Campus, Tifton, GA 31793 USA TI - Modeling the ripening of sapote mamey [Pouteria sapota (Jacq.) HE Moore and Stearn] fruit at various temperatures AB - A linear-plateau model was used to describe the changes in soluble solids content (SSC) of sapote mamey [Pouteria sapota (Jacq.) H.E. Moore and Stearn] fruit over time as affected by ripening temperature. The model assumed that, as fruit ripened, SSC increased at a linear rate reaching a maximum (30% SSC) at the ripe stage after which SSC changed little. The rate of fruit ripening and the time to reach the ripe stage were calculated from the model. The rate of ripening increased steadily with increases in storage temperature. Fruit kept at 28, 25, 20, 15 and 10 degreesC ripened 3.5, 5, 7, 15 and 30 days after harvest, respectively. Temperature quotients (Q(10)) for fruit ripening decreased with increasing storage temperature. The model shows that shelf life of sapote marney can be significantly extended by cool storage. The model can be used to estimate the time for fruit to reach the ripe stage, as long as the initial SSC and storage temperatures are known. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000181794300020 L2 - chilling injury;postharvest;quality;ripening;Sapotaceae;soluble solids content SO - Postharvest Biology and Technology 2003 ;28(1):199-202 7347 UI - 9105 AU - az-Rivera LM AU - Pimentel LO AD - Univ Florida, Dept Phys, Gainesville, FL 32611, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoDiaz-Rivera, LM, Univ Florida, Dept Phys, POB 118440, Gainesville, FL 32611 USA TI - Required conditions for late time acceleration and early time deceleration in generalized scalar-tensor theories AB - We consider a generalized scalar-tensor theory, where we let the coupling function omega(phi) and the effective cosmological constants Lambda(phi) be undetermined. We obtain general expressions for omega(phi) and Lambda(phi) in terms of the scalar field and the scale factor, and show that omega(phi) depends on the scalar field and the scale factor in a complicated way. In order to study the conditions for an accelerated expansion at the present time and a decelerated expansion in the past, we assume a power law evolution for the scalar field and the scale factor. We analyze the required conditions that allow our model to satisfy the weak field limits on omega(phi), and at the same time, to obtain the correct values of cosmological parameters, as the energy density Omega(m0) and cosmological constant Lambda(t(0)). We also study the conditions for a decelerated expansion at an early time dominated by radiation. We find values for omega(phi) and Lambda(phi) consistent with the expectations of a theory where the cosmological constant decreases with the time and the coupling function increases until the values are accepted today MH - USA MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000181216400006 L2 - scalar-tensor theories;accelerated expansion of the universe;decelerated expansion of the universe;COSMOLOGICAL MODELS; EXPONENTIAL POTENTIALS; QUINTESSENCE; CONSTANT; UNIVERSE; GRAVITY; SUPERNOVA; FLUID; CONSEQUENCES; CONSTRAINTS SO - International Journal of Modern Physics A 2003 ;18(4):651-671 7348 UI - 7735 AU - az-Ruiz G AU - Guyot JP AU - Ruiz-Teran F AU - Morlon-Guyot J AU - Wacher C AD - UNAM, Dept Alimentos & Biotecnol, Fac Quim, Mexico City 04510, DF, MexicoInst Rech Dev, Unite Nutr Alimentat Soc R106, F-34032 Montpellier 1, FranceWacher, C, UNAM, Dept Alimentos & Biotecnol, Fac Quim, Mexico City 04510, DF, Mexico TI - Microbial and physiological characterization of weakly amylolytic but fast-growing lactic acid bacteria: A functional role in supporting microbial diversity in pozol, a Mexican fermented maize beverage AB - Pozol is an acid beverage obtained from the natural fermentation of nixtamal (heat- and alkali-treated maize) dough. The concentration of mono- and disaccharides from maize is reduced during nixtamalization, so that starch is the main carbohydrate available for lactic acid fermentation. In order to provide some basis to understand the role of amylolytic lactic acid bacteria (ALAB) in this fermented food, their diversity and physiological characteristics were determined. Forty amylolytic strains were characterized by phenotypic and molecular taxonomic methods. Four different biotypes were distinguished via ribotyping; Streptococcus bovis strains were found to be predominant. Streptococcus macedonicus, Lactococcus lactis, and Enterococcus sulfureus strains were also identified. S. bovis strain 25124 showed extremely low amylase yield relative to biomass (139 U g [cell dry weight](-1)) and specific rate of amylase production (130.7 U g [cell dry weight](-1) h(-1)). In contrast, it showed a high specific growth rate (0.94 h(-1)) and an efficient energy conversion yield to bacterial cell biomass (0.31 g of biomass g of substrate(-1)). These would confer on the strain a competitive advantage and are the possible reasons for its dominance. Transient accumulation of maltoolligosaccharides during fermentation could presumably serve as energy sources for nonamylolytic species in pozol fermentation. This would explain the observed diversity and the dominance of nonamylolytic lactic acid bacteria at the end of fermentation. These results are the first step to understanding the importance of ALAB during pozol fermentation MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000184672500004 L2 - LACTOBACILLUS-FERMENTUM; DOUGH POZOL; STARCH; FERMENTATIONS; STRAINS; FISH; OGI; GROWTH SO - Applied and Environmental Microbiology 2003 ;69(8):4367-4374 7349 UI - 7944 AU - az-Sanchez A AU - Ramirez-Angulo J AU - Lemus-Lopez J AD - Natl Inst Astrophys Opt & Elect, Tonantzintla, MexicoNew Mexico State Univ, Mixed Signal VLSI Lab, Klipsch Sch Elect & Comp Engn, Las Cruces, NM 88003, USAPubl Univ, Natl Inst Res Astrophys Opt & Elect, Puebla, MexicoDiaz-Sanchez, A, Natl Inst Astrophys Opt & Elect, Tonantzintla, Mexico TI - Analog adaptive median filters AB - The implementation of analog adaptive median filters for image processing is discussed. The adaptive median filter is based on transconductance comparators, whose saturation current is adapted to act as a local weight operator. Transistor level simulations have shown excellent results in removing incidence noise. A 249 x 209 pixel image, corrupted with 35% salt and pepper noise, is used to test the adaptive median filter. All the simulations were made using BSIM3' s level 49 model and 1.2 mum MOSIS technology parameters MH - Mexico|Puebla MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0925-1030 UR - ISI:000184170000003 SO - Analog Integrated Circuits and Signal Processing 2003 ;36(3):207-213 7350 UI - 8284 AU - az-Solis H AU - Kothmann MM AU - Hamilton WT AU - Grant WE AD - Texas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAUniv Autonoma Agraria Antonio Narro, Dept Recursos Nat, Saltillo 25315, Coahuila, MexicoTexas A&M Univ, Dept Rangeland Ecol & Management, College Stn, TX 77843, USAGrant, WE, Texas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843 USA TI - A simple ecological sustainability simulator (SESS) for stocking rate management on semi-arid grazinglands AB - We constructed a simple simulation model (SESS) of the dynamics of forage growth and standing crop and cattle production to evaluate the ecological sustainability of management alternatives for extensive cow-calf production systems in northeastern Mexico and south Texas. Equations were written to estimate annual net primary production based on range condition, annual precipitation, and soil characteristics typical of the region. Simulations were conducted for annual precipitation levels of 300, 500, and 700 mm to estimate total and green standing crop dynamics, cattle grazing efficiency, and range condition trend for different stocking rates. The model-estimated stocking rates to achieve stable or slight improvement of range condition for the three precipitation levels were close to 58, 15, and 6 ha per animal-unit-year (AUY), respectively. With the model parameterized for precipitation and soil characteristics combined with the stocking rates recommended by COTECOCA (1979. Coahuila. Tipos de vegetacion, sitos de productividad forrajera y coeficientes de agostadero. Secretaria de Recursos Hidraulicos. Comision Tecnico Consultiva para la Determinacion Regional de los Coeficientes de Agostadero. Mexico), we conducted 20-year simulations for three groups of range sites of Coahuila, Mexico (annual precipitation: 1: 270 mm, 2: 351 mm and 3: 467 mm). The trends of body condition score and range condition for years 5, 10, 15, and 20 were similar within each of the three groups. The stocking rates recommended by COTECOCA were too high for sustainability on range site groups with 270 and 351 mm annual precipitation. The simulated probabilities for pregnancy rates at different stocking rates for the three groups indicated that the stocking rates recommended by COTECOCA were too high to achieve pregnancy rates greater than or equal to 80% in 8 out of 10 years with no supplement in the form of hay or concentrated feeds. Model simulations suggested that, in the absence of supplemental feed, ecological sustainability and acceptable livestock production could be achieved simultaneously at light stocking rates. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0308-521X UR - ISI:000183414600015 L2 - models;simulation;grazinglands;rangelands;semi-arid zones;ANP;sustainability;range condition;grazing;cattle reproduction;PRECIPITATION; SYSTEMS; GROWTH SO - Agricultural Systems 2003 ;76(2):655-680 7351 UI - 8496 AU - Babu KS AU - Kobayashi T AU - Kubo J AD - Oklahoma State Univ, Dept Phys, Stillwater, OK 74078, USAKyoto Univ, Dept Phys, Kyoto 6068502, JapanUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoKanazawa Univ, Inst Theoret Phys, Kanazawa, Ishikawa 9201192, JapanBabu, KS, Oklahoma State Univ, Dept Phys, Stillwater, OK 74078, USA TI - Finite theories and the supersymmetry flavor problem AB - We study a finite SU(5) grand unified model based on the non-Abelian discrete symmetry A(4). This model leads to the democratic structure of the mass matrices for the quarks and leptons. In the soft supersymmetry breaking sector, the scalar trilinear couplings are aligned and the soft scalar masses are degenerate, thus solving the SUSY flavor problem MH - Japan MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Review AV - English IS - 0556-2821 UR - ISI:000182718300098 L2 - SOFTLY BROKEN SUPERSYMMETRY; SUSY GAUGE-THEORIES; RENORMALIZATION-GROUP EQUATIONS; NEUTRALINO-STAU COANNIHILATION; YUKAWA-UNIFIED MODELS; INFRARED FIXED-POINTS; YANG-MILLS THEORIES; COLD DARK-MATTER; BETA-FUNCTION; 2-LOOP RENORMALIZATION SO - Physical Review D 2003 ;67(7): 7352 UI - 8851 AU - Bacilio-Jimenez M AU - guilar-Flores S AU - Ventura-Zapata E AU - Perez-Campos E AU - Bouquelet S AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Lab Inmunol, Dept Bioquim, Fac Med, Mexico City 04510, DF, MexicoInst Nacl Enfermedades Resp, Dept Bioquim, Tlalpan 14080, DF, MexicoCtr Invest Biol Noroeste, La Paz 23000, Baja Calif Sur, MexicoIPN, Lab Fisiol Vegetal, Dept Bot, Escuela Nacl Ciencias Biol, Mexico City 45873, DF, MexicoIPN, Dept Biotecnol, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoUniv Sci & Technol Lille, Chim Biol Lab, UMR CNRS 8576, F-59655 Villeneuve Dascq, FranceZenteno, E, Univ Nacl Autonoma Mexico, Lab Inmunol, Dept Bioquim, Fac Med, Mexico City 04510, DF, Mexico TI - Chemical characterization of root exudates from rice (Oryza sativa) and their effects on the chemotactic response of endophytic bacteria AB - Root exudates represent an important source of nutrients for microorganisms in the rhizosphere and seem to participate in early colonization inducing chemotactic responses of rhizospheric bacteria. We characterized the root exudates collected from rice plantlets cultured under hydroponic conditions and assessed their effects on the chemotaxis of two strains of endophytic bacteria, Corynebacterium flavescens and Bacillus pumilus, collected from the rice rhizosphere. We compared these chemotactic effects on endophytic bacteria with those on two strains of plant-growth-promoting bacteria, Azospirillum brasilense (isolated from the corn rhizosphere) and Bacillus sp. (from the rice rhizosphere). The root exudates were collected at different time intervals. The highest concentration and diversity of amino acids and carbohydrates were found during the first 2 weeks after seeding. Histidine, proline, valine, alanine, and glycine were the main amino acid residues identified during the 4 weeks of culture. The main carbohydrates identified were glucose, arabinose, mannose, galactose, and glucuronic acid. The chemotactic responses of the analyzed endophytic bacteria to root exudates were 3.9 to 5.1 times higher than those of A. brasilense and 2.2 to 2.8 times higher than Bacillus sp. Our results indicate that rice exudates may induce a higher chemotactic response for endophytic bacteria than for other bacterial strains present in the rice rhizosphere MH - France MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 13 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 0032-079X UR - ISI:000181745700004 L2 - endophytic bacteria;chemotaxis;plant-growth-promoting bacteria;root exudates;rice;PSEUDOMONAS-FLUORESCENS STRAIN; AZOSPIRILLUM-BRASILENSE; BRADYRHIZOBIUM-JAPONICUM; SOYBEAN ROOT; WHEAT ROOTS; RHIZOSPHERE; COLONIZATION; ATTACHMENT; BACILLUS; GROWTH SO - Plant and Soil 2003 ;249(2):271-277 7353 UI - 9190 AU - Bacmann A AU - Lefloch B AU - Ceccarelli C AU - Steinacker J AU - Castets A AU - Loinard L AD - European So Observ, D-85748 Garching, GermanyInst Astrophys, D-07745 Jena, GermanyUniv Sternwarte, D-07745 Jena, GermanyObserv Grenoble, Astrophys Lab, F-38041 Grenoble, FranceObserv Bordeaux, F-33270 Florac, FranceUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoBacmann, A, European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany TI - CO depletion and deuterium fractionation in prestellar cores AB - We report the detection of D2CO in a sample of starless dense cores, in which we previously measured the degree of CO depletion. The deuterium fractionation is found to be extremely high, [D2CO]/[H2CO] similar to 1%-10%, similar to that reported in low-mass protostars. This provides convincing evidence that D2CO is formed in the cold prestellar cores and later desorbed when the gas warms up in protostars. We find that the cores with the highest CO depletions have also the largest [D2CO]/[H2CO] ratios, supporting the theoretical prediction that deuteration increases with increasing CO depletion MH - France MH - Germany MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 51 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000181046600014 L2 - ISM : abundances;ISM : molecules;stars : formation;ATOMIC OXYGEN ABUNDANCE; GRAIN SURFACE-CHEMISTRY; MOLECULAR CLOUDS; FORMALDEHYDE; ABSORPTION; EMISSION; RATIO; D2CO SO - Astrophysical Journal 2003 ;585(1):L55-L58 7354 UI - 8648 AU - Bada JL AU - Lazcano A AD - Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoBada, JL, Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA TI - Prebiotic soup - Revisiting the Miller experiment MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000182579800030 SO - Science 2003 ;300(5620):745-746 7355 UI - 7488 AU - Badillo-Almaraz V AU - Trocellier P AU - vila-Rangel I AD - CEA, CNRS, UMR 9956, Lab Pierre Sue, F-91191 Gif Sur Yvette, FranceCE Saclay, CEA, DEN, DMN,SRMP, F-91191 Gif Sur Yvette, FranceUniv Autonoma Zacatecas, Ctr Reg Estudio Nucl, Zacatecas 98068, ZAC, MexicoTrocellier, P, CEA, CNRS, UMR 9956, Lab Pierre Sue, Batiment 520,Piece 125, F-91191 Gif Sur Yvette, France TI - Adsorption of aqueous Zn(II) species on synthetic zeolites AB - To supply a good quality drinkable water tends to become a strategic task in both developed and under development countries in the world due to the number of potential contamination sources. One of the major problems is derived from the presence of heavy toxic metals like zinc or lead resulting from industrial activities. Zeolites are known as very efficient mineral substrates for fixing aqueous ionic species through their wide range of channels present in the crystalline structure and due to their strong surface reactivity. MicroPIXE coupled with microRBS (3.05 MeV He-4(+) ions) have been used to quantify the incorporation of zinc within two commercial zeolites containing alkali elements (zeolite X and clinoptilolite) in the concentration range of: 0.0002-0.05 M at neutral pH. At the beginning of the interaction between zeolite and Zn(II) solution, the adsorption process exhibits a direct proportionality between the content of zinc fixed on the mineral substrate and the aqueous concentration up to 0.01 M. Beyond this point a saturation effect seems to occur, indicating the strong decrease of available adsorption sites. Sodium or potassium ions are probably exchanged with Zn(II) ions during this process. The compared behaviour of the two zeolites is then discussed in terms of kinetic effects based on ionic radius values. A co-adsorption test carried on with a 50-50% Zn(II) 0.001 M-Pb(II) 0.001 M solution shows that lead does not occupy the same sites as zinc because the content of zinc fixed on the zeolite sample exactly corresponds to the result obtained with a pure 0.001 M Zn(II) solution. All these data clearly showed that zeolite surface reactivity is greatly influenced by the mineral cage-like structure and particularly the presence of pockets, spaces and channels. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Zacatecas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000185352300079 L2 - zeolite;adsorption;ion exchange;zinc;lead;mRBS;mPIXE SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2003 ;210():424-428 7356 UI - 8981 AU - Badillo-Almaraz VE AU - Ly J AD - CEA, Matter Sci Div, Condensate State Atom & Mol Res Dept, Pierre Sue Lab,Ctr Etud Saclay, F-91191 Gif Sur Yvette, FranceCEA, Ctr Etud Saclay,Nucl Energy Div, Lab Study Radionuclides Behav Their Environm, Serv Analyt & Phys Chem,Dept Phys Chem, F-91191 Gif Sur Yvette, FranceBadillo-Almaraz, VE, Univ Autonoma Zacatecas, Ctr Reg Estudios Nucl, Cipres 10, La Penuela 98068, Zacatecas, Mexico TI - Calcium sorption on hydroxyapatite in aqueous solutions: reversible and nonreversible components AB - The sorption and desorption of calcium were studied on hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) in 0.01 M Ca(ClO4)(2) aqueous solutions at 25 degreesC in the pH range 4.5-11.5, under conditions of solubility equilibrium. Thus, the isotopic exchange of Ca-45 can be utilized to obtain the partition coefficients of calcium on Ca-10(PO4)(6)(OH)(2), whose solubility product was previously estimated from a literature review: log *K-s(0) = -87.2 +/- 1.4. Under these conditions, calcium was partially desorbed from hydroxyapatite particles. The experimental data were analyzed assuming a reversible component of the partition coefficient and a nonreversible sorption component that might result from the polycrystalline nature of the hydroxyapatite particle. (C) 2003 Elsevier Science (USA). All rights reserved MH - France MH - Mexico|Zacatecas PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000181400400004 L2 - sorption;calcium;hydroxyapatite;solubility;reversibility;ADSORPTION; SOLUBILITY; DESORPTION; DIFFUSION; CADMIUM; WATER SO - Journal of Colloid and Interface Science 2003 ;258(1):27-32 7357 UI - 8183 AU - Bains I AU - Cohen RJ AU - Louridas A AU - Richards AMS AU - Rosa-Gonzalez D AU - Yates JA AD - Univ Hertfordshire, Dept Phys Sci, Astron Grp, Hatfield AL10 9AB, Herts, EnglandUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Kent, Elect Engn Lab, Canterbury CT2 7NT, Kent, EnglandINAOE, Puebla 72840, MexicoUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandBains, I, Univ Hertfordshire, Dept Phys Sci, Astron Grp, Coll Lane, Hatfield AL10 9AB, Herts, England TI - Sub-au imaging of water vapour clouds around four asymptotic giant branch stars AB - We present MERLIN maps of the 22-GHz H2O masers around four low-mass late-type stars (IK Tau, U Ori, RT Vir and U Her), made with an angular resolution of similar to15 milliarcsec and a velocity resolution of 0.1 km s(-1). The H2O masers are found in thick expanding shells with inner radii similar to6 to 16 au and outer radii four times larger. The expansion velocity increases radially through the H2O maser regions, with logarithmic velocity gradients of 0.5-0.9. IK Tau and RT Vir have well-filled H2O maser shells with a spatial offset between the near and far sides of the shell, which suggests that the masers are distributed in oblate spheroids inclined to the line of sight. U Ori and U Her have elongated poorly filled shells with indications that the masers at the inner edge have been compressed by shocks; these stars also show OH maser flares. MERLIN resolves individual maser clouds, which have diameters of 2-4 au and filling factors of only similar to0.01 with respect to the whole H2O maser shells. The circumstellar envelope velocity structure gives additional evidence the maser clouds are density-bounded. Masing clouds can be identified over a similar time-scale to their sound crossing time (similar to2 yr) but not longer. The sizes and observed lifetimes of these clouds are an order of magnitude smaller than for those around red supergiants, similar to the ratio of low-mass:high-mass stellar masses and sizes. This suggests that cloud size is determined by stellar properties, not local physical phenomena in the wind MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000183549500007 L2 - masers;stars : AGB and post-AGB;circumstellar matter;stars : evolution;stars : kinematics;stars : mass-loss;INTERMEDIATE-MASS STARS; ASPHERICAL STELLAR OUTFLOWS; U-ORIONIS; CIRCUMSTELLAR ENVELOPE; SEMIREGULAR VARIABLES; EVOLVED STARS; MERLIN OBSERVATIONS; H2O MASERS; OH MASER; MIDINFRARED SPECTRA SO - Monthly Notices of the Royal Astronomical Society 2003 ;342(1):8-32 7358 UI - 7733 AU - Baker JM AU - Lopez-Medrano E AU - Navarro-Siguenza AG AU - Rojas-Soto OR AU - Omland KE AD - Univ Maryland, Dept Sci Biol, Baltimore, MD 21250, USAUniv Maryland, Dept Philosophy, Baltimore, MD 21250, USANatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoOmland, KE, Univ Maryland, Dept Sci Biol, Baltimore, MD 21250, USA TI - Recent speciation in the orchard oriole group: Divergence of Icterus spurius spurius and Icterus spurius fuertesi AB - New World orioles (Icterus) include several closely related species and subspecies pairs that provide excellent opportunities for studying recent speciation. We examined a subspecies pair in the Orchard Oriole group: Orchard Oriole (l. spurius spurius), a long-distance migrant that breeds in eastern North America, and Fuertes's Oriole (l. s. fuertesi), a short-distance migrant that breeds in a restricted range in Veracruz, Mexico. We sequenced parts of the mitochondrial cytochrome-b gene (925 base pairs) and control region (344 base pairs) from 23 Orchard Orioles and 7 Fuertes's Orioles. Subspecies are not reciprocally monophyletic. Instead, our data suggest that at least one taxon is paraphyletic or polyphyletic. We found little support for any further phylogenetic structure, including whether one subspecies might be derived from the other. However, haplotype frequency analysis suggests that there is little or no current gene flow between the taxa. The phylogenetic relationship between Orchard and Fuertes's orioles is likely a result of recent divergence and incomplete lineage sorting. That interpretation is consistent with theoretical models of speciation, which predict patterns of nonmonophyly at early stages of taxon divergence. Our findings suggest that Orchard and Fuertes's orioles are separate species and provide a case study for evaluating the importance of monophyly in defining species limits MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 12 U4 - Ornithology U5 - J;Article AV - French IS - 0004-8038 UR - ISI:000184830800026 L2 - MITOCHONDRIAL-GENE TREES; CONTROL-REGION SEQUENCES; SPECIES CONCEPTS; PHYLOGENETIC-RELATIONSHIPS; MOLECULAR PHYLOGENETICS; EVOLUTIONARY HISTORY; 3-TIMES RULE; DNA; HYBRIDIZATION; AMPLIFICATION SO - Auk 2003 ;120(3):848-859 7359 UI - 6462 AU - Bakris GL AU - Gaxiola E AU - Messerli F AU - Keltai M AU - Mancia G AU - Erdine S AU - Pepine CJ AD - Rush Med Coll, Chicago, IL 60612, USAInst Cardiovasc Guadalajara, Guadalajara, Jalisco, MexicoOchsner Clin & Alton Ochsner Med Fdn, New Orleans, LA, USAHungarian Inst Cardiol, Budapest, HungaryUniv Milan, Milan, ItalyUniv Istanbul, Cerrahpasa Med Sch, Istanbul, TurkeyUniv Florida, Gainesville, FL, USA TI - Cardiovascular outcomes in diabetic patients with hypertension and coronary artery disease: The International Verapamil/trandolapril STudy MH - Hungary MH - Italy MH - Mexico|Jalisco MH - Turkey MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000186360603415 SO - Circulation 2003 ;108(17):745-745 7360 UI - 6833 AU - Baldazzi G AU - Bollini D AU - Rodriguez AEC AU - Dabrowski W AU - Garcia AD AU - Gambaccini M AU - Giubellino P AU - Gombia M AU - Grybos P AU - Idzik M AU - Marzari-Chiesa A AU - Montano LM AU - Prino F AU - Ramello L AU - Sitta M AU - Swientek K AU - Taibi A AU - Tuffanelli A AU - Wheadon R AU - Wiacek P AD - Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Alessandria, ItalyIst Nazl Fis Nucl, Alessandria, ItalyUniv Bologna, Dipartmento Fis, Bologna, ItalyIst Nazl Fis Nucl, I-40126 Bologna, ItalyCEADEN, Havana, CubaUniv Min & Met Krakow, Fac Phys & Nucl Tech, Krakow, PolandUniv Ferrara, Dipartmento Fis, I-44100 Ferrara, ItalyIst Nazl Fis Nucl, Ferrara, ItalyIst Nazl Fis Nucl, I-10125 Turin, ItalyUniv Turin, Dipartimento Fis Sperimentale, Turin, ItalyCINVESTAV, Mexico City 14000, DF, MexicoPrino, F, Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Corso Borsalino 54, Alessandria, Italy TI - A silicon strip detector coupled to the RX64 ASIC for X-ray diagnostic imaging AB - First results from a silicon microstrip detector with 100 mum pitch coupled to the RX64 ASIC are presented. The system is capable of single photon counting in digital X-ray imaging, with possible applications to dual energy mammography and angiography. The main features of the detecting system are low noise, good spatial resolution and high counting rate capability. The energy resolution and the conversion efficiency of the system are discussed, based on results obtained with fluorescence X-ray sources and quasi-monochromatic X-ray beams in the 8-36 keV energy range, with strips being either orthogonal or parallel to the incoming X-rays. We present also preliminary imaging results obtained with a plexiglass phantom with tiny cylindrical cavities filled with iodate solution, simulating patient vessels; in this case the X-ray beam has two components, respectively below and above the iodine Kedge at 33.17 keV. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Italy MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000186810500032 L2 - X-rays;imaging;angiography;silicon detectors;ASIC;POSITION-SENSITIVE MEASUREMENTS; BINARY READOUT; RADIOLOGY; SYSTEM; CHIP SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;514(1-3):206-214 7361 UI - 7588 AU - Baldazzi G AU - Bollini D AU - Rodriguez AEC AU - Dabrowski W AU - Garcia AD AU - Gambaccini M AU - Giubellino P AU - Gombia M AU - Grybos P AU - Idzik M AU - Marzari-Chiesa A AU - Zetina LMM AU - Prino F AU - Ramello L AU - Sitta M AU - Swientek K AU - Taibi A AU - Tuffanelli A AU - Wheadon R AU - Wiacek P AD - Univ Piemonte Orientale, DISTA, Alessandria, ItalyIst Nazl Fis Nucl, Alessandria, ItalyCINVESTAV, Mexico City 14000, DF, MexicoUniv Turin, Dipartimento Fis Sperimentale, Turin, ItalyIst Nazl Fis Nucl, I-10125 Turin, ItalyUniv Ferrara, Dipartimento Fis, I-44100 Ferrara, ItalyIst Nazl Fis Nucl, Ferrara, ItalyUniv Min & Met Krakow, Fac Phys & Nucl Tech, Krakow, PolandCEADEN, Havana, CubaUniv Bologna, Dipartimento Fis, Bologna, ItalyIst Nazl Fis Nucl, I-40126 Bologna, ItalyRamello, L, Univ Piemonte Orientale, DISTA, Alessandria, Italy TI - X-ray imaging with a silicon microstrip detector coupled to the RX64 ASIC AB - A single photon counting X-ray imaging system, with possible applications to dual energy mammography and angiography, is presented. A silicon microstrip detector with 100 mum pitch strips is coupled to RX64 ASICs, each of them including 64 channels of preamplifier, shaper, discriminator and scaler. The system has low noise, good spatial resolution and high counting rate capability. Results on energy resolution have been obtained with a fluorescence source and quasi-monochromatic X-rays beams. Preliminary images obtained with an angiographic phantom are presented. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Italy MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000185047700047 L2 - X-rays;imaging;angiography;silicon detector;ASIC;STRIP DETECTORS; READOUT SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;509(1-3):315-320 7362 UI - 6881 AU - Balderas-Lopez JA AU - Mandelis A AD - Univ Toronto, Dept Mech & Ind Engn, Ctr Adv Diffus Wave Technol CADIFT, Toronto, ON M5R 3G8, CanadaBalderas-Lopez, JA, IPN, Unidad Profes Interdisciplinaria Biotecnol, Av Acueducto S-N, Mexico City 07340, DF, Mexico TI - Self-normalized photothermal technique for accurate thermal diffusivity measurements in thin metal layers AB - A self-normalized photothermal method for measuring thermal diffusivity of thin metal layers has been implemented using two experimental configurations based on photothermal radiometry and gas-cell photoacoustic detection. The corresponding measurement procedures involve linear fits in the photothermally thin and/or thick limits. As part of this method, simple experimental criteria have been developed to ascertain that a purely thermal-diffusion-wave mechanism is dominant throughout the selected frequency range, thus validating the accuracy of the thermal diffusivity measurements. Thermal-diffusivity values measured using the intrinsic reliability of this self-normalized photothermal measurement scheme are reported for two commercial samples of aluminum and steel thin layers. (C) 2003 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000186755400038 L2 - FREQUENCY-DOMAIN; RADIOMETRY; SOLIDS SO - Review of Scientific Instruments 2003 ;74(12):5219-5225 7363 UI - 8871 AU - Balderas-Lopez JA AU - Mandelis A AD - IPN, Unidad Prof Interdisciplinaria Biotecn, Mexico City 07340, DF, MexicoUniv Toronto, PODL, Dept Mech & Ind Engn, Toronto, ON M5R 3G8, CanadaBalderas-Lopez, JA, IPN, Unidad Prof Interdisciplinaria Biotecn, Ave Acueducto S-N Col Barrio Laguna,Gustavo A Med, Mexico City 07340, DF, Mexico TI - New photopyroelectric technique for precise measurements of the thermal effusivity of transparent liquids AB - A new photopyroelectric methodology for thermal effusivity measurements in transparent liquids is presented. The new methodology involves the thermally thick limit of the pyroelectric signal in the standard front-surface configuration. A signal normalization procedure, which avoids the conventional requirement for transfer function determination, is implemented. The thermal effusivity of five liquids was measured by means of this technique, and very good agreement was found with corresponding values reported in the literature MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000181764300008 L2 - photopyroelectric;thermal effusivity;transparent liquids;WAVE RESONATOR CAVITY; HEAT-CAPACITY; DIFFUSIVITY; CONDUCTIVITY; CELL SO - International Journal of Thermophysics 2003 ;24(2):463-471 7364 UI - 9370 AU - Balderas-Lopez JA AU - Mandelis A AD - Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON M5R 3G8, CanadaIPN, Unidad Profess Interdisciplinaria Biotecnol, Dept Math, Mexico City 07340, DF, MexicoBalderas-Lopez, JA, Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, 5 Kings Coll Rd, Toronto, ON M5R 3G8, Canada TI - Self-consistent photothermal techniques: Application for measuring thermal diffusivity in vegetable oils AB - The thermal wave resonator cavity (TWRC) was used to measure the thermal properties of vegetable oils. The thermal diffusivity of six commercial vegetable oils (olive, corn, soybean, canola, peanut, and sunflower) was measured by means of this device. A linear relation between both the amplitude and phase as functions of the cavity length for the TWRC was observed and used for the measurements. Three significant figure precisions were obtained. A clear distinction between extra virgin olive oil and other oils in terms of thermal diffusivity was shown. The high measurement precision of the TWRC highlights the potential of this relatively new technique for assessing the quality of this kind of fluids in terms of their thermophysical properties. (C) 2003 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000180451900120 L2 - MODE REJECTION DEMODULATION; WAVE DETECTION; EFFUSIVITY; LIQUIDS; CAVITY; CELL SO - Review of Scientific Instruments 2003 ;74(1):700-702 7365 UI - 7995 AU - Ballesteros-Paredes J AU - Klessen RS AU - Vazquez-Semadeni E AD - Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064, USAAstrophys Inst Potsdam, D-14482 Potsdam, GermanyBallesteros-Paredes, J, Amer Museum Nat Hist, Dept Astrophys, Cent Pk W & 79th St, New York, NY 10024 USA TI - Dynamic cores in hydrostatic disguise AB - We discuss the column density profiles of "cores" in three-dimensional smoothed particle hydrodynamics (SPH) numerical simulations of turbulent molecular clouds. The SPH scheme allows us to perform a high spatial resolution analysis of the density maxima (cores) at scales between similar to0.003 and 0.3 pc. We analyze simulations in three different physical conditions: large-scale driving (LSD), small-scale driving (SSD), and random Gaussian initial conditions without driving (GC), each one at two different time steps: just before self-gravity is turned on (t(0)) and when gravity has been operating such that 5% of the total mass in the box has been accreted into cores (t(1)). For this data set, we perform Bonnor-Ebert fits to the column density profiles of cores found by a clump-finding algorithm. We find that, for the particular fitting procedure we use, 65% of the cores can be matched to Bonnor-Ebert (BE) profiles, and of these, 47% correspond to stable equilibrium configurations with xi(max) <6.5, even though the cores analyzed in the simulations are not in equilibrium but instead are dynamically evolving. The temperatures obtained with the fitting procedure vary between 5 and 60 K (in spite of the simulations being isothermal, with T = 11: 3 K), with the peak of the distribution being at T = 11 K and most clumps having fitted temperatures between 5 and 30 K. Central densities obtained with the BE fit tend to be smaller than the actual central densities of the cores. We also find that for the LSD and GC cases, there are more BE-like cores at t(0) than at t(1) with ξ(max) &LE; 20, while in the case of SSD, there are more such cores at t(1) than at t(0). We interpret this as a consequence of the stronger turbulence present in the cores of run SSD, which prevents good BE fits in the absence of gravity, and delays collapse in its presence. Finally, in some cases we find substantial superposition effects when we analyze the projection of the density structures, even though the scales over which we project are small (&LSIM;0.18 pc). As a consequence, different projections of the same core may give very different values of the BE fits. Finally, we briefly discuss recent results claiming that Bok globule B68 is in hydrostatic equilibrium, stressing that they imply that this core is unstable by a wide margin. We conclude that fitting BE profiles to observed cores is not an unambiguous test of hydrostatic equilibrium and that fit-estimated parameters such as mass, central density, density contrast, temperature, or radial profile of the BE sphere may differ significantly from the actual values in the cores MH - Germany MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000184098600015 L2 - ISM : clouds;ISM : kinematics and dynamics;stars : formation;turbulence;MASS STAR-FORMATION; HIERARCHICAL INTERSTELLAR STRUCTURE; TURBULENT MOLECULAR CLOUDS; GRAVITATIONAL COLLAPSE; PROTOSTELLAR COLLAPSE; STELLAR CLUSTERS; FLOWS; B335; FRAGMENTATION; SIMULATIONS SO - Astrophysical Journal 2003 ;592(1):188-202 7366 UI - 9293 AU - Ballinas MD AU - Miguel ERD AU - Munoz M AU - de Gyves J AD - Univ Nacl Autonoma Mexico, Dept Quim Analit, Fac Quim, Mexico City 04510, DF, MexicoUniv Autonoma Barcelona, Fac Ciencies, Unitat Quim Analit, Bellaterra 08193, Barcelona, Spainde Gyves, J, Univ Nacl Autonoma Mexico, Dept Quim Analit, Fac Quim, Mexico City 04510, DF, Mexico TI - Arsenic(V) extraction from sulfuric acid media using DBBP-D2EHPA organic mixtures AB - Several mixtures of the organophosphorus extractants dibutyl butyl phosphonate (DBBP) and bis(2-ethylhexyl)phosphoric acid (D2EHPA) have been investigated for arsenic removal from sulfuric acid media in a synthetic copper electrolyte solution. The extraction system has been characterized in terms of As(V), metal [Fe(III), Sb(V), Ni(II), Cu(II)], and H2SO4 loadings; extraction and stripping contact times; organic-phase composition; organic-to-aqueous ratio; and selectivity. McCabe-Thiele interpolations indicate a reduction in the arsenic electrolyte concentration from 7300 to 2000 mg/L in two theoretical stages at O/A = 4 for the 1.5 M DBBP-0.5 M D2EHPA mixture at 50 degreesC. For mixtures of DBBP and D2EHPA, there is an increase in the arsenic distribution (synergism) compared to DBBP alone, and at the same time, extractant loss and sulfuric acid coextraction are diminished MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000180771900018 SO - Industrial & Engineering Chemistry Research 2003 ;42(3):574-581 7367 UI - 7292 AU - Balmaseda J AU - Reguera E AU - Gomez A AU - Roque J AU - Vazquez C AU - Autie M AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaUNAM, Inst Mat Res, Mexico City, DF, MexicoNatl Ctr Sci Res, Havana 6880, CubaReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - On the microporous nature of transition metal nitroprussides AB - Nitroprussides of divalent transition metals form a family of microporous molecular materials. Their properties in this sense depend on the transition metal cation involved and also on the preparative method, which determine their crystal structures. The stable phases of this family of materials belong to one of the following crystal structures: orthorhombic (Pnma) (Mn2+, Fe2+, Cu2+, Zn2+, and Cd2+), cubic (Fm3m) (CO2+ and Ni2+) and orthorhombic (Amm2) (Cu2+). These materials are stable up to above 160degreesC, while their dehydration takes place around 100degreesC. On dehydration, Amm2 copper complex changes into a tetragonal (14mm) phase. The microporous nature of these materials is discussed according to their crystal structure and correlating structural and adsorption data. The accessibility to the pore system was evaluated through adsorption of H2O, CO2, and N-2. Pores of both orthorhombic and cubic structures are accessible to H2O and CO2 in experiments carried out at 23 and 0degreesC, respectively; however, they are inaccessible to N-2 at -196degreesC. This behavior is discussed as related to the large polarizing power of the nitrosyl (NO) ligand which distorts the local environment of the iron atom and reduces the effective window cross section. The small pores of tetragonal copper nitroprusside were inaccessible to the adsorbates used MH - Cuba MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000185857500015 L2 - CRYSTAL-STRUCTURE ANALYSIS; MOLECULAR-SIEVES; ADSORPTION; ZEOLITES; ELEMENTS; SPECTRA; STATES SO - Journal of Physical Chemistry B 2003 ;107(41):11360-11369 7368 UI - 9337 AU - Balmaseda J AU - Reguera E AU - Fernandez J AU - Gordillo A AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaCtr Pharmaceut Chem, Havana, CubaIPN, Sch Math & Phys, Mexico City 07738, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, Havana 10400, Cuba TI - Behavior of Prussian blue-based materials in presence of ammonia AB - Prussian blue and related materials, usually considered that behave as a zeolite for ammonia adsorption, when hydrated are unstable in the presence of this gaseous species. They remain stable only in the anhydrous form. In the decomposition products ammonium hexacyanometallates and an XRD amorphous iron(III) oxyhydroxide are detected. The crystallization and adsorbed water present in these solid materials participates in a decomposition reaction to give NH4+ and OH-. The very basic OH- anion removes the iron(III) cations from the complex to form Fe(OH)(3) and finally FeOOH, while the formed NH4+ appears as the salt of the complex anion. As reference reactions, the interaction of ammonia with ferrocyanic acid and ferric chloride, both in solid state, were studied where crystalline ammonium ferrocyanide and ammonium chloride, respectively, are formed. (C) 2003 Published by Elsevier Science Ltd MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000180580900020 L2 - COBALT-IRON CYANIDE; MOLECULAR-BASED MAGNETS; PHOTOINDUCED MAGNETIZATION; MOSSBAUER-SPECTRA; ROOM-TEMPERATURE; THIN-FILM; TRANSITION; SPECTROSCOPY; PERFORMANCE; BERNALITE SO - Journal of Physics and Chemistry of Solids 2003 ;64(4):685-693 7369 UI - 7912 AU - Banaiee N AU - Bobadilla-del-Valle M AU - Riska PF AU - Bardarov S AU - Small PM AU - Ponce-de-Leon A AU - Jacobs WR AU - Hatfull GF AU - Sifuentes-Osornio J AD - Stanford Univ, Sch Med, Dept Infect Dis & Geog Med, Stanford, CA 94305, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoAlbert Einstein Coll Med, Howard Hughes Med Inst, Bronx, NY 10467, USAUniv Pittsburgh, Dept Biol Sci, Pittsburgh, PA 15260, USASuny Downstate Med Ctr, Brooklyn, NY 11203, USABanaiee, N, Stanford Univ, Sch Med, Dept Infect Dis & Geog Med, Stanford, CA 94305 USA TI - Rapid identification and susceptibility testing of Mycobacterium tuberculosis from MGIT cultures with luciferase reporter mycobacteriophages AB - In a prospective study conducted in a diagnostic laboratory in Mexico City, luciferase reporter mycobacteriophages (LRPs) were evaluated for their utility and performance in identification and antibiotic-susceptibility testing of Mycobacterium tuberculosis complex (MTC) isolates from MGIT-960 cultures. Eighty-four consecutive MGIT cultures recovered from 54 patients were included in this study. The LRPs confirmed mycobacterial growth in 79 (94 %) of 84 MGIT cultures. Failure to confirm growth was due to low inoculum (n = 1) or growth with non-tuberculous mycobacteria (n = 4). The median time to confirmation of MGIT cultures was 1 day (range 1-55). Confirmed cultures were identified with p-nitro-alpha-acetylamino-beta-hydroxypropiophenone (NAP), a selective inhibitor of MTC species, and results obtained with LRPs were compared with those obtained by BACTEC-460. The sensitivity and specificity of the LRP NAP test were respectively 97 and 100 %, and the median turnaround time for identification was 3 days with both methods. The accuracy and speed of the LRPs for susceptibility testing with rifampicin, streptomycin, isoniazid and ethambutol were compared with BACTEC-460 and discrepant results were tested by the conventional agar proportion method. In total, 72 MTC cultures were tested. The overall agreement between the LRPs and BACTEC-460 was 98.6 %. Four isolates (5-6 %) were falsely identified as ethambutol-resistant. The median turnaround time for susceptibility testing was 3 days (range 3-57) with the LRPs and 9 days (range 7-29) with BACTEC-460. LRPs offer an accurate and rapid approach for identification and susceptibility testing of M. tuberculosis from MGIT-960 cultures MH - USA MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 14 U4 - Microbiology U5 - J;Article AV - English IS - 0022-2615 UR - ISI:000184233400005 L2 - MULTIDRUG-RESISTANT TUBERCULOSIS; SHORT-COURSE CHEMOTHERAPY; GROWTH INDICATOR TUBE; SELECTIVE-INHIBITION; DIFFERENTIATION; OUTCOMES SO - Journal of Medical Microbiology 2003 ;52(7):557-561 7370 UI - 8111 AU - Band-Schmidt CJ AU - Lilly EL AU - Anderson DM AD - Ctr Invest Biol Noroeste, La Paz 23000, BCS, MexicoWoods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543, USABand-Schmidt, CJ, Ctr Invest Biol Noroeste, Apdo Postal 128, La Paz 23000, BCS, Mexico TI - Identification of Alexandrium affine and A-margalefii (Dinophyceae) using DNA sequencing and LSU rDNA-based RFLP-PCR assays AB - Restriction fragment length polymorphism (RFLP) patterns have been used in the past to distinguish Alexandrium species and strains. We report on the identification of A. affine and A. margalefii from Bahia Concepcion, Mexico, by RFLP and DNA sequencing. Polymerase chain reaction amplifications of the D1-D2 fragment of the nuclear large-subunit (LSU) ribosomal RNA gene resulted in a single product of approximately 720 bp for both species. The restriction patterns for A. affine (strain AABCV-1) digested with NspI had fragments that were approximately 500, 125, and 75 bp long. With MseI, fragments of approximately 350 and 300 bp were obtained; with ApaLI, two fragments, approximately 500 and 225 bp long, were observed. Alexandrium margalefii (strain AMBCQ-1) yielded fragments of 550 and 120 bp with NspI, and fragments of 300, 250, 95, and 45 bp with MseI, but was not digested by ApaLI. Agreement between expected and observed RFLP patterns was found in A. affine and A. margalefii strains with NspI, MseI, and ApaLI. Sequences of the D1-D2 domains of the LSU rDNA of A. affine and A. margalefii were compared with those of 18 other Alexandrium isolates, using maximum likelihood and maximum parsimony analyses. Strain AABCV-1 grouped within the A. affine clade, with 100% bootstrap support, and strain AMBCQ-1 was placed within the A. margalefii clade. The record of A. margalefii is the first for North America MH - Mexico|Baja California Sur MH - USA PB - LAWRENCE: INT PHYCOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0031-8884 UR - ISI:000183733700004 L2 - RIBOSOMAL-RNA GENES; SHIPS BALLAST WATER; GULF-OF-CALIFORNIA; SECONDARY STRUCTURE; BAHIA-CONCEPCION; NORTH-AMERICAN; DINOFLAGELLATE; TAMARENSE; STRAIN; HETEROGENEITY SO - Phycologia 2003 ;42(3):261-268 7371 UI - 9008 AU - Band-Schmidt CJ AU - Lechuga-Deveze CH AU - Kulis DM AU - Anderson DM AD - CIBNOR, La Paz 23000, BCS, MexicoWoods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543, USABand-Schmidt, CJ, CIBNOR, Apdo Postal 128, La Paz 23000, BCS, Mexico TI - Culture studies of Alexandrium affine (Dinophyceae), a non-toxic cyst forming dinoflagellate from Bahia Concepcion, Gulf of California AB - Alexandrium affine (Inoue et Fukuyo) Balech, isolated from Bahia Concepcion (Gulf of California), was studied to determine the effect of environmental factors on cyst germination and vegetative growth. Alexandrium affine was homothallic and isogamous, and formed cysts in nutrient-deficient (N- or P-limiting) medium. The maturation period of newly formed cysts varied between two weeks and three months, depending on the storage temperature, with colder temperatures prolonging the process. The rate of germination increased with increasing temperature, and was not significantly influenced by light. Germination experiments suggest a broad temperature window for A. affine cysts, ranging from 5 to 25degreesC. The optimal vegetative growth rates were 0.25 to 0.34 day(-1) at 20-30degreesC. No vegetative growth was observed below 15degreesC or above 35degreesC. With HPLC toxin analyses, we confirm that this species does not produce saxitoxins. These data on the dormancy, excystment, and growth characteristics seem to be regulated by the environmental constraints of this subtropical bay MH - Mexico|Baja California Sur MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000181454800006 L2 - GONYAULAX-TAMARENSIS; GENUS ALEXANDRIUM; OF-CALIFORNIA; LIFE-HISTORY; GERMINATION; POPULATION; SEXUALITY; GROWTH SO - Botanica Marina 2003 ;46(1):44-54 7372 UI - 8443 AU - Banhart F AU - Hernandez E AU - Terrones M AD - Univ Ulm, ZE Elektronenmikroskopie, D-89069 Ulm, GermanyCSIC, Inst Ciencia Mat Barcelona, ICMAB, E-08193 Barcelona, SpainIPICyT, Adv Mat Dept, San Luis Potosi 78210, MexicoBanhart, F, Univ Ulm, ZE Elektronenmikroskopie, D-89069 Ulm, Germany TI - Extreme superheating and supercooling of encapsulated metals in fullerenelike shells AB - Nanometer-sized tin and lead crystals exhibit drastically altered melting and solidification behavior when encapsulated in fullerenelike graphitic shells. The melting transitions of encapsulated Sn and Pb nanocrystals are shown in an in situ electron microscopy study to occur at unexpectedly high temperatures, significantly higher than the melting point of the corresponding bulk materials. Atomistic simulations are used to show that the driving force for superheating is a pressure buildup of up to 3 GPa, that prevails inside graphitic shells under electron irradiation MH - Germany MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000182823900028 L2 - CARBON ONIONS; MELTING-POINT; ALUMINUM; ATOMS; AL; NANOPARTICLES; NANOTUBES; NANOWIRES; SURFACE; MATRIX SO - Physical Review Letters 2003 ;90(18): 7373 UI - 7862 AU - Bankoff SG AU - Johnson MFG AU - Miksis MJ AU - Schluter RA AU - Lopez PG AD - Northwestern Univ, Dept Chem Engn, Evanston, IL 60208, USANorthwestern Univ, Dept Engn Sci & Appl Math, Evanston, IL 60208, USANorthwestern Univ, Dept Phys & Astron, Evanston, IL 60208, USACICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoBankoff, SG, Northwestern Univ, Dept Chem Engn, Evanston, IL 60208, USA TI - Dynamics of a dry spot AB - Experimental results are presented for the motion of a dry spot in a thin viscous film on a horizontal surface. These include global and spatial measurements of dry spot diameter, front velocities, static and dynamic contact angle, and the shape of the liquid-solid interface. Data are presented as a function of initial fluid depth for both an advancing fluid front of a collapsing dry spot and a receding fluid front of an opening dry spot. Results for both cases show that the final or static hole diameter increases as the initial fluid depth decreases. Also, insight is obtained into the relationship between the contact angle and the velocity for both advancing and receding fluid fronts. The experimental results are compared to a lubrication model, and good agreement is obtained MH - Mexico|Baja California MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000184357900010 L2 - SOLID-SURFACES; LIQUID-FILMS; HOLES; FLOWS; FLUID SO - Journal of Fluid Mechanics 2003 ;486():239-259 7374 UI - 8115 AU - Barahona LF AU - Rorrer GL AD - Oregon State Univ, Dept Chem Engn, Corvallis, OR 97331, USACICY Biotecnol, Cordemex 97310, Merida, MexicoRorrer, GL, Oregon State Univ, Dept Chem Engn, Corvallis, OR 97331, USA TI - Isolation of halogenated monoterpenes from bioreactor-cultured microplantlets of the macrophytic red algae Ochtodes secundiramea and Portieria hornemannii AB - Field collections of the red macroalgae Ochtodes secundiramea and Portieria hornemannii exhibit site-to-site variations in halogenated monoterpene (HMT) content. In contrast, microplantlets of O. secundiramea and P. hornemannii established through cell and tissue culture techniques had remarkably similar HMT profiles when cultivated in a photobioreactor under identical, controlled conditions. Both algae shared Apakaochtodene B (6) as the only cyclic HMT, 10E-bromomyrcene (3) and 10E-bromo-3-chloro-alpha-myrcene (4) as the dominant acyclic HMTs, and myrcene (1) as their common precursor. Furthermore, HMT yields were comparable between organisms (0.9-1.3 mumol/g dry mass of 6; 3.4-4.4 mumol/g of 3). P. hornemannii microplantlets also contained 7-chloromyrcene (9) as the dominant compound (37-73 mumol/g), suggesting additional chlorination capacity. Proposed pathways for HMT biosynthesis shared by P. hornemannii and O. secundiramea microplantlets possessed two common manifolds: (a) bromonium ion (Br+)-catalyzed cyclization of 1, followed by chlorination to yield 6; (b) Markovnikov addition of Br+ at Delta(6,10) of 1 to yield 3 with a marked selectivity (>50:1) for the E isomer, followed by chlorination of 3 to 4. This study demonstrated that bioreactor tissue culture is a new venue for bioprospecting and production of natural compounds from marine macroalgae under a controlled environment MH - Mexico|Yucatan MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000183814600003 L2 - MARINE NATURAL-PRODUCTS; VANADIUM HALOPEROXIDASES; CHONDROCOCCUS-HORNEMANNI; RHODOPHYTA; METABOLITE SO - Journal of Natural Products 2003 ;66(6):743-751 7375 UI - 8676 AU - Baraldo A AU - Rapalini AE AU - Bohnel H AU - Mena M AD - Univ Buenos Aires, Dept Ciencias Geol, INGEODAV, Buenos Aires, DF, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Unidad Ciencias Tierra, Juriquilla 76230, Queretaro, MexicoGeoforschungszentrum Potsdam, D-14473 Potsdam, GermanyBaraldo, A, Univ Buenos Aires, Dept Ciencias Geol, INGEODAV, Pabellon 2,Ciudad Univ,C1428EHA, Buenos Aires, DF, Argentina TI - Paleomagnetic study of Deception Island, South Shetland Islands, Antarctica AB - A paleomagnetic study was carried out on recent volcanic rocks exposed on Deception Island (63.0degreesS, 60.6degreesW), Antarctica. Sampling comprised all stratigraphic units exposed on the island, which include basaltic, andesitic and trachytic lavas, basaltic dykes and pyroclastic flows. Following stepwise thermal and alternating field demagnetization procedures, consistent characteristic remanence directions were determined at 21 sites, using principal-component analysis. The overall mean remanence direction for the Deception Island rocks is dec. 348.8degrees, inc. -73.7degrees, alpha(95) = 4.4degrees, N = 21, and is consistent within error with the geocentric axial dipole direction at the study locality. All of the studied rocks show normal polarity, indicating a Brunhes Chron age. The only available radiometric date of 153 +/- 46 kyr agrees with this and suggests a minimum chronostratigraphic span of 100 kyr for the sampled rocks. The site mean directions show a Fisherian distribution and dispersion values compatible with current palaeosecular variation models. No evidence of the far-sided or right-handed effect is found in our data MH - Argentina MH - Germany MH - Mexico|Queretaro PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000182281200004 L2 - Antarctica;Deception Island;Earth magnetic field;palaeomagnetism;palaeosecular variation;Quaternary;PAST 5 MYR; GEOMAGNETIC-FIELD; SECULAR VARIATION; DIRECTIONS; STATISTICS; DATABASE; MA SO - Geophysical Journal International 2003 ;153(2):333-343 7376 UI - 6427 AU - Barandela R AU - Rangel E AU - Sanchez JS AU - Ferri FJ AD - Inst Tecnol Toluca, Lab Pattern Recognit, Metepec 52140, Mexico. Inst Geog Trop, Havana, Cuba. Univ Jaume I, Dept Llenguatges & Sistemes Informat, Castello 12071, Spain. Univ Valencia, Dept Informat, E-46100 Burjassot, Spain TI - Restricted decontamination for the imbalanced training sample problem AB - The problem of imbalanced training data in supervised methods is currently receiving growing attention. Imbalanced data means that one class is much more represented than the others in the training sample. It has been observed that this situation, which arises in several practical domains, may produce an important deterioration of the classification accuracy, in particular with patterns belonging to the less represented classes. In the present paper, we report experimental results that point at the convenience of correctly downsizing the majority class while simultaneously increasing the size of the minority one in order to balance both classes. This is obtained by applying a modification of the previously proposed Decontamination methodology. Combination of this proposal with the employment of a weighted distance function is also explored MH - Cuba MH - Mexico|Estado De Mexico MH - Spain T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlerbarandela@hotmail.com0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY19C AV - English IS - 0302-9743 UR - ISI:000188097600052 SO - 2003 ;():424-431 7377 UI - 6663 AU - Barandela R AU - Sanchez JS AU - Valdovinos RM AD - Inst Tecnol Toluca, Metepec, MexicoUniv Jaume I, Castello, SpainBarandela, R, Inst Tecnol Toluca, Metepec, Mexico TI - New applications of ensembles of classifiers AB - Combination (ensembles) of classifiers is now a well established research line. It has been observed that the predictive accuracy of a combination of independent classifiers excels that of the single best classifier. While ensembles of classifiers have been mostly employed to achieve higher recognition accuracy, this paper focuses on the use of combinations of individual classifiers for handling several problems from the practice in the machine learning, pattern recognition and data mining domains. In particular, the study presented concentrates on managing the imbalanced training sample problem, scaling up some preprocessing algorithms and filtering the training set. Here, all these situations are examined mainly in connection with the nearest neighbour classifier. Experimental results show the potential of multiple classifier systems when applied to those situations MH - Mexico|Estado De Mexico MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 1433-7541 UR - ISI:000187286800009 L2 - algorithm scalability;ensembles, filtering outliers;imbalanced training sample;nearest neighbour rule;preprocessing techniques;NEAREST-NEIGHBOR RULE; LEARNING ALGORITHMS; INSTANCE SELECTION; TABU SEARCH; CLASSIFICATION; PROTOTYPES; DESIGN; SUBSET SO - Pattern Analysis and Applications 2003 ;6(3):245-256 7378 UI - 7631 AU - Barandela R AU - Sanchez JS AU - Garcia V AU - Ferri FJ AD - Inst Tecnol Toluca, Metepec 52140, MexicoDept Llenguatges Sistemas Informat, Castello 12071, SpainUniv Valencia, Dept Informat, E-46100 Burjassot, SpainInst Geog, Havana, CubaBarandela, R, Inst Tecnol Toluca, Av Tecnol SN, Metepec 52140, Mexico TI - Learning from imbalanced sets through resampling and weighting AB - The problem of imbalanced training sets in supervised pattern recognition methods is receiving growing attention. Imbalanced training sample means that one class is represented by a large number of examples while the other is represented by only a few. It has been observed that this situation, which arises in several practical situations, may produce an important deterioration of the classification accuracy, in particular with patterns belonging to the less represented classes. In the present paper, we introduce a new approach to design an instance-based classifier in such imbalanced environments MH - Cuba MH - Mexico|Estado De Mexico MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000184832300010 SO - Pattern Recognition and Image Analysis, Proceedings 2003 ;2652():80-88 7379 UI - 9585 AU - Barandela R AU - Sanchez JS AU - Garcia V AU - Rangel E AD - Inst Tecnol Toluca, Metepec 52140, MexicoUniv Jaume 1, Dept Llenguatges & Sistemes Informat, Castellon 12071, SpainSanchez, JS, Univ Jaume I, Av Vincent Sos Baynat S-N, Castellon de La Plana 12006, Spain TI - Strategies for learning in class imbalance problems MH - Mexico|Estado De Mexico MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0031-3203 UR - ISI:000179732400023 SO - Pattern Recognition 2003 ;36(3):849-851 7380 UI - 7221 AU - Barba-Bahrens NY AU - Tellez F AU - Contreras R AU - Hernandez RM AU - Bernes S AU - Noth H AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoCINVESTAV, IPN, Mexico City, DF, MexicoUAP, Ctr Quim IC, Puebla, MexicoUniv Munich, Inst Inorgan Chem, D-8000 Munich, Germany TI - New developments on the coordination behaviour of 2-substitued benzimidazoles MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Meeting Abstract AV - English IS - 0162-0134 UR - ISI:000184009800150 SO - Journal of Inorganic Biochemistry 2003 ;96(1):98-98 7381 UI - 7850 AU - Barbero C AU - Castro GL AU - Mariano A AD - Natl Univ La Plata, Dept Fis, Fac Ciencias Exactas, RA-1900 La Plata, ArgentinaInst Politecn Nacl, Dept Fis, Mexico City 07000, DF, MexicoBarbero, C, Natl Univ La Plata, Dept Fis, Fac Ciencias Exactas, CC 67, RA-1900 La Plata, Argentina TI - Double beta decay of Sigma(-) hyperons AB - We compute the strangeness-conserving double beta decay of Sigma(-) hyperons, which is the only hadronic system that can undergo such decays. We consider both, the lepton number conserving Sigma(-) --> Sigma(+)e(-)e(-)(ν) over bar(ν) over bar (betabetaSigma2(nu)) and the lepton number violating E- -->. Sigma(+)e(-)e(-) (betabeta(Sigma0nu)) modes. The branching ratios of these betabeta decays are suppressed at the level of 10(-30) considering a light neutrino scenario in the case of the betabeta(Sigma0nu) channel. The dynamical origin of such low rates and their possible enhancements are briefly discussed. Given its simplicity those decays can be used also for the purposes of illustrating the main features of double beta decays. (C) 2003 Published by Elsevier B.V MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000184294400013 L2 - double-beta decay;Sigma hyperon;MAJORANA NEUTRINO MASSES; SUPERSYMMETRIC THEORIES; NUCLEAR MOMENTS; LEPTON-NUMBER; UPPER-BOUNDS; LIMIT; SPECTRUM; MAJORONS; EMISSION; MODES SO - Physics Letters B 2003 ;566(1-2):98-107 7382 UI - 7391 AU - Barboza-Flores M AU - Melendrez R AU - Gastelum S AU - Chernov V AU - Bernal R AU - Cruz-Vazquez C AU - Brown F AU - Pedroza-Montero M AU - Gan B AU - Ahn J AU - Zhang Q AU - Yoon SF AD - Univ Sonora, Ctr Invest Fis, Sonora 83190, MexicoUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoNanyang Technol Univ, Ctr Microelect, Singapore 639798, SingaporeBarboza-Flores, M, Univ Sonora, Ctr Invest Fis, Apdo Postal 5-088, Sonora 83190, Mexico TI - Thermoluminescence characterization of CVD diamond film exposed to UV and beta radiation AB - Thermoluminscence (TL) properties of diamond films grown by microwave and hot filament CVD techniques were studied. The main purpose of the present work was to characterize the thermoluminescence response of diamond films to ultraviolet and beta radiation. The thermoluminescence excitation spectrum exhibits maximum TL efficiency around 210-215 nm. All samples presented a glow curve composed of at least one TL peak and showed regions of linear as well as supralinear behavior as a function or irradiation dose. The linear dose dependence was found for up to sixteen minutes of monochromatic UV irradiation and 300 Gy for beta irradiated samples. The activation energy and the frequency factor were determined and found in the range of 0.33-1.7 eV and 5.44 x 10(2) - 5.67 x 10(16) s(-1), respectively. The observed TL performance is reasonable appropriate to justify further investigation of diamond films as radiation dosimeters keeping in mind that diamond is an ideal TL dosemeter since it is tissue-equivalent and biological compatible. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Mexico|Sonora MH - Singapore PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000185422000024 L2 - DOSIMETER; DETECTORS SO - Physica Status Solidi A-Applied Research 2003 ;199(1):125-130 7383 UI - 7847 AU - Barcena DG AU - Schally AV AU - Buenfil MV AU - Morales AC AU - Hernandez LV AU - Cardenas-Cornejo I AU - Schally AMC AD - Hosp Especialidades Ctr Med La Raza, Inst Mexicano Seguro Social, Ctr Med Raza, Dept Clin Endocrinol Seris & Zaachila, Mexico City 02990, DF, MexicoVet Affairs Med Ctr, Inst Endocrine Polypeptide & Canc, New Orleans, LA 70146, USATulane Univ, Sch Med, New Orleans, LA 70118, USABarcena, DG, Hosp Especialidades Ctr Med La Raza, Inst Mexicano Seguro Social, Ctr Med Raza, Dept Clin Endocrinol Seris & Zaachila, Col Raza, Mexico City 02990, DF, Mexico TI - Response of patients with advanced prostatic cancer to administration of somatostatin analog RC-160 (vapreotide) at the time of relapse AB - BACKGROUND. The aim of this study was to evaluate the effects of administration of the somatostatin analog RC-160 (vapreotide) at the time of relapse in patients with androgen independent prostate cancer. METHODS. Our study included 13 patients with biopsy-proven prostate cancer, stage D3. Eight patients had been treated with a depot formulation of the agonist D-Trp-6-LH-RH, with a median remission time of 68 (range 48-102 months). Five patients were initially treated by surgical orchiectomy, but relapsed after a median time of 33 months (range 17-91 months). A new remission period with a median duration of 10 months (range 2-29 months) was induced with Ketoconazole in the orchiectomy group. At the relapse time, all the patients received 1 mg of vapreotide t.i.d., by subcutaneous route, in addition to D-Trp-6-LH-RH, or Ketoconazole in the orchiectomy group. RESULTS. Eight of 13 patients demonstrated clinical improvement after 3 months of therapy with vapreotide, six showing a decrease in serum prostate specific antigen (PSA) from 234.5+/-308.5 to 68.2+/-60.5 ng/ml (mean decline 71+/-8%; P<0.05). Two additional patients presented a fall in serum prostatic acid phosphatase (PAP). Responding patients showed a decrease in the bone pain score from 2.62+/-0.48 to 0.37+/-0.69 and an increase in the Karnofsky performance status from 72.3+/-4.21 to 83.6+/-23.2 (P<0.05). In accord with the ECOG criteria, two patients had a complete response; four had partial response, and two had a stable response. Four patients did not respond and one was not evaluable. Two patients died in remission, one at 16 months due to myocardial infarction and the other at 24 months due to pneumonia. Three patients relapsed at 5,17, and 19 months respectively. Three patients who have been followed-up for more than 3 years continued in remission (79,45, and 45 months) respectively. Vapreotide was well tolerated, only three patients having transitory mild diarrhea. CONCLUSIONS. Our results indicate that therapy with the somatostatin analog vapreotide at the time of relapse can induce objective clinical responses in some patients with prostate cancer who are refractory to androgen ablation induced by LH-RH analogs or orchiectomy. (C) 2003 Wiley- Liss, Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism;Urology & Nephrology U5 - J;Article AV - English IS - 0270-4137 UR - ISI:000184371800003 L2 - androgen independent tumors;remission;growth factors;HORMONE-RELEASING HORMONE; PITUITARY-GONADAL AXIS; RECEPTOR SUBTYPES; MOLECULAR-BIOLOGY; CELL-PROLIFERATION; CARCINOMA; THERAPY; INHIBITION; GROWTH; D-TRP-6-LH-RH SO - Prostate 2003 ;56(3):183-191 7384 UI - 6686 AU - Barcenas ME AU - Haros M AU - Rosell CM AD - CSIC, Inst Agroquim & Tecnol Alimentos, Lab Cereales, Valencia 46100, SpainUniv Americas, Puebla, MexicoRosell, CM, CSIC, Inst Agroquim & Tecnol Alimentos, Lab Cereales, POB 73, Valencia 46100, Spain TI - An approach to studying the effect of different bread improvers on the staling of pre-baked frozen bread AB - The usefulness of different bread improvers (alpha-amylase, sourdough, kappa-carrageenan, hydroxypropylmethylcellulose) in an interrupted baking process was evaluated by using a differential scanning calorimeter as an oven. The thermal transitions of the wheat starch produced during the part-baking process, frozen storage at -18 degreesC, finish baking and aging of the baked dough at 4 degreesC were registered. The thermal properties of wheat starch during gelatinisation measured by differential scanning calorimetry were slightly affected by the dough formulation: only the peak temperature and the onset temperature underwent an increase, whereas the gelatinisation enthalpy decreased. The presence of the bread improvers minimised the negative effect of the frozen storage observed in the control sample, which showed an increase in the retrogradation temperature range. Concerning the aging of the baked dough after freezing and re-baking, all the improvers decreased the retrogradation enthalpy of the amylopectin, retarding the staling. Bread improvers can act effectively in the interrupted baking processes with frozen storage of the part-baked breads MH - Mexico|Puebla MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1438-2377 UR - ISI:000187288500010 L2 - part-baking;bread improvers;differential scanning calorimetry;amylopectin;freezing;WHEAT-STARCH GELS; SCANNING CALORIMETRY; PHASE-TRANSITIONS; HYDROCOLLOID SYSTEMS; PASTING PROPERTIES; DOUGH RHEOLOGY; FREEZING RATE; STORAGE; WATER; FLOUR SO - European Food Research and Technology 2003 ;218(1):56-61 7385 UI - 7659 AU - Barcenas ME AU - Haros M AU - Benedito C AU - Rosell CM AD - CSIC, Inst Agroquim & Tecnol Alimentos, Lab Cereales, Valencia 46100, SpainUniv Amer, Puebla, MexicoRosell, CM, CSIC, Inst Agroquim & Tecnol Alimentos, Lab Cereales, POB 73, Valencia 46100, Spain TI - Effect of freezing and frozen storage on the staling of part-baked bread AB - The effect of part-baking, freezing, frozen storage, thawing, rebaking on the aging behaviour of bread was evaluated. The amylopectin modification during the process was assessed by differential scanning calorimetry (DSC), while changes in bread quality were followed by crumb hardness measurements. During frozen storage no retrogradation of amylopectin was detected in the part-baked dough. When analysing the aging of the rebaked samples, it was observed that the time of frozen storage produced a progressive increase of the retrogradation temperature range of the amylopectin, and also great energy was required for amylopectin melting at longer storage period, indicating that structural changes of amylopectin were produced during frozen storage. Regarding the quality of the fresh bread resulted after rebaking, crumb hardness increase with the time of frozen storage, and also the hardening rate during aging was dependent on that time. Crumb hardness results of the fresh bread and also DSC studies indicate that some changes are produced during the frozen storage. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0963-9969 UR - ISI:000184967500013 L2 - part-baking;DSC;amylopectin;freezing;gelatinization;retrogradation;aging;part-baked bread;hardness;DIFFERENTIAL SCANNING CALORIMETRY; DOUGH RHEOLOGY; THAW CYCLES; WHEAT-FLOUR; SHELF-LIFE; STARCH; QUALITY; WATER; GELATINIZATION; RETROGRADATION SO - Food Research International 2003 ;36(8):863-869 7386 UI - 9128 AU - Barnett NP AU - Monti PM AU - Cherpitel C AU - Bendtsen P AU - Borges G AU - Colby SM AU - Nordqvist C AU - Johansson K AD - Brown Univ, Ctr Alcohol & Addict Studies, Providence, RI 02912, USAProvidence VA Med Ctr, Providence, RI, USAAlcohol Res Grp, Berkeley, CA, USAUniv Hosp, Linkoping, SwedenMetropolitan Autonomous Univ, Xochimilco, MexicoNatl Inst Psychiat, Xochimilco, MexicoBarnett, NP, Brown Univ, Ctr Alcohol & Addict Studies, Box G-BH, Providence, RI 02912 USA TI - Identification and brief treatment of alcohol problems with medical patients: An international perspective AB - This article summarizes the proceedings of a symposium at the 2002 RSA meeting in San Francisco, California. The chair was Peter Monti and co-chair was Nancy Barnett. The aim of the symposium was to bring together researchers from the United States, Sweden, and Mexico to present current findings on the development and implementation of screening and intervention research in Emergency Departments (ED). Cheryl Cherpitel presented findings on the performance of the Rapid Alcohol Problems Screen (RAPS4), a 4-item instrument used for screening for alcohol dependence and harmful drinking in the ED. Dr. Cherpitel also presented for her collaborator, Guilherme Borges, their research on the performance of a number of screening measures including the RAPS among Mexicans and Mexican-Americans with alcohol-related disorders in the ED. Preben Bendtsen described the implementation of an alcohol screening and intervention procedure delivered by ordinary ED staff in Sweden. Nancy Barnett presented data on characteristics related to readiness to change alcohol use in a sample of young adults who Were treated in an ED for injury or intoxication MH - Mexico|Distrito Federal MH - USA MH - Sweden PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 8 U4 - Substance Abuse U5 - J;Article AV - English IS - 0145-6008 UR - ISI:000181172400012 L2 - emergency department;alcohol;screening;EMERGENCY ROOM; SCREENING INSTRUMENTS; MEXICAN-AMERICANS; PROBLEM DRINKING; USE DISORDERS; GENERAL-POPULATION; BRIEF INTERVENTION; UNITED-STATES; RISK-DRINKING; TRAUMA CENTER SO - Alcoholism-Clinical and Experimental Research 2003 ;27(2):262-270 7387 UI - 7644 AU - Barone MA AU - Nazerali H AU - Cortes M AU - Chen-Mok M AU - Pollack AE AU - Sokal D AD - EngenderHlth, New York, NY, USAFamily Hlth Int, Res Triangle Pk, NC 27709, USAInst Mexicano Seguro Social, Mexico City, DF, MexicoBarone, MA, EngenderHlth, New York, NY, USA TI - A prospective study of time and number of ejaculations to azoospermia after vasectomy by ligation and excision AB - Purpose: We obtained detailed information on the time and number of ejaculations to azoospermia after vasectomy by ligation and excision. Materials and Methods:. Men seeking vasectomy at 3 public clinics in Mexico City were invited to participate in this prospective noncomparative study. Vasectomy was performed using the no-scalpel technique. The vas was occluded using 2 silk sutures and the segment of vas between the ligatures was excised. Men were followed biweekly up to 24 weeks after vasectomy or until azoospermia was confirmed. Semen was examined at each visit for sperm concentration and motility. The main outcome measure was azoospermia in uncentrifuged semen samples. Results: The life table rate for time to azoospermia was 81.5/100 men (95% CI 76.2 to 86.9) by the end of the study. Cumulative Kaplan-Meier event probability attained a maximum of 79.5/100 men (95% Cl 73.7 to 85.2) at 70 ejaculations. Only 60/100 and 27.9/100 men were azoospermic by 12 weeks and 20 ejaculations, respectively. These end points are the commonly recommended waiting periods when semen analysis is unavailable. Of the 217 men 36 (16.6%) did not achieve azoospermia by 24 weeks, of whom 25 (11.5% of all participants) were considered to have vasectomy failure. Conclusions: Our results suggest that it is not possible to develop guidelines for clearance based only on the time or number of ejaculations when ligation and excision are performed. In addition, of the methods for vas occlusion during vasectomy ligation and excision may not provide the best success rates MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 13 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0022-5347 UR - ISI:000184813400051 L2 - testis;vasectomy;oligospermia;infertility, male;sterilization, sexual;SPERM SO - Journal of Urology 2003 ;170(3):892-896 7388 UI - 8252 AU - Barot M AU - Lenzing H AD - UNAM, Inst Matemat, Mexico City 04510, DF, MexicoUniv Gesamthsch Paderborn, Fachbereich Math Informat, D-33095 Paderborn, GermanyBarot, M, UNAM, Inst Matemat, Mexico City 04510, DF, Mexico TI - One-point extensions and derived equivalence AB - Work of the first author with de la Pena [M. Barot, J.A. de la Pena, Proc. Amer. Math. Soc. 127 (1999) 647-655], concerned with the class of algebras derived equivalent to a tubular algebra, raised the question whether a derived equivalence between two algebras can be extended to one-point extensions. The present paper yields a positive answer. (C) 2003 Elsevier Science (USA). All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000183371000001 L2 - CATEGORIES; ALGEBRAS SO - Journal of Algebra 2003 ;264(1):1-5 7389 UI - 7353 AU - Barquero R AU - Mendez R AU - Iniguez MP AU - Vega-Carrillo HR AD - Hosp Univ Rio Hortega Valladolid, Zacatecas 98000, MexicoUniv Valladolid, E-47002 Valladolid, Spain TI - Neutron measurements around an 18 MV LINAC MH - Mexico|Zacatecas MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Environmental Studies;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Meeting Abstract AV - English IS - 0017-9078 UR - ISI:000183160000075 SO - Health Physics 2003 ;84(6):S173-S173 7390 UI - 8989 AU - Barrado E AU - Jimenez F AU - Prieto F AU - Nuevo C AD - Univ Valladolid, Fac Ciencias, Dept Quim Analit, E-47005 Valladolid, SpainUniv Autonoma Estado de Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoProaqua Nutr SA, Palencia, SpainBarrado, E, Univ Valladolid, Fac Ciencias, Dept Quim Analit, P Prado Magdalena S-N, E-47005 Valladolid, Spain TI - The use of fatty-acid profiles of the lipids of the rainbow trout (Oncorhynchus mykiss) to differentiate tissue and dietary feed AB - Fatty acids were determined in several tissues of rainbow trout (Oncorhynchus mykiss), from three fish hatcheries, by gas chromatography of their methyl esters. The qualitative and quantitative changes produced in fatty acid composition in these tissues, over time, related to the diet, were also explored. Through the application of two multivariate statistical methods, factor and cluster analysis, fish and tissues were classified according to the fish hatchery and the tissues categorised in terms of fatty acid composition. Findings indicate that differences in fatty acid composition were related to the fat content of the dietary feed. Three well-differentiated groups of specimens were defined according to the hatchery of origin (diet). Clustering by tissues also gave rise to defined groups. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000181479600003 L2 - aquaculture;rainbow trout;fatty acids;gas chromatography;multivariate analysis;GAS-CHROMATOGRAPHY; MULTIVARIATE SO - Food Chemistry 2003 ;81(1):13-20 7391 UI - 8922 AU - Barranco AP AU - Tera AH AU - Monjaras RV AU - Eiras JA AU - Garcia D AU - Pinar FC AU - Martinez OP AD - Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, BrazilUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv La Habana, Fac Fis, Inst Mat & React, Havana 10400, CubaEiras, JA, Univ Fed Sao Carlos, Dept Fis, Rod Wash Luis,Km 235, BR-13565905 Sao Carlos, SP, Brazil TI - Influence of synthesis process on the AC response of PLZT (8/65/35) ferroelectric ceramics AB - AC conductivity measurements have been carried out to study the dielectric characteristics of a ferroelectric PLZT (8/65/35). The initial powders were synthesized by two different methods: conventional mixed oxides and a chemical coprecipitation method. In both cases, the final ceramic bodies were obtained by an uniaxial hot-pressing step. The grain and grain boundary responses have been separated and a mixture of ionic-electronic conductivity was evaluated from the Arrhenius dependence. The preparation techniques led to different absolute conductivity values for each contribution (grain, sigma(g), or grain boundary, sigma(gb)). The samples prepared by the mixed oxide method (MO) showed a higher bulk conductivity than those prepared by the coprecipitation method (CP). This result was explained taking into account the different concentration of charge carriers in MO than CP samples, influenced by the PbO content in the grain boundary. The dielectric analyses showed classical ordinary relaxor-dielectrics with a diffuse phase transition, which was markedly larger in the oxide-milled method (MO). The conductive mechanisms and their influence on the dielectric behavior were studied and led to the conclusion that they affect the dielectric permittivity measurements. The dielectric permittivity without the conductivity component showed a phase transition with lower dispersion for both preparation techniques. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Brazil MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000181643400019 L2 - AC response;dielectric properties;electrical conductivity;ferroelectrics properties;PLZT;ZIRCONATE-TITANATE CERAMICS; CONDUCTIVITY; RELAXATION SO - Journal of the European Ceramic Society 2003 ;23(8):1337-1343 7392 UI - 8841 AU - Barranon A AU - Cardenas R AU - Dorso CO AU - Lopez JA AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoUniv Texas, El Paso, TX 79968, USAUniv Buenos Aires, RA-1428 Buenos Aires, DF, ArgentinaBarranon, A, Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, Mexico TI - The critical exponent of nuclear fragmentation AB - Nuclei colliding at energies in the MeV's break into fragments in a process that resembles a liquid-to-gas phase transition of the excited nuclear matter. If this is the case, phase changes occurring near the critical point should yield a "droplet" mass distribution of the form approximate toA(-tau), with tau (a critical exponent universal to many processes) within 2 less than or equal to tau less than or equal to 3. This critical phenomenon, however, can be obscured by the finiteness in space of the nuclei and in time of the reaction. With this in mind, this work studies the possibility of having critical phenomena in small "static" systems (using percolation of cubic and spherical grids), and on small "dynamic" systems (using molecular dynamics simulations of nuclear collisions in two and three dimensions). This is done investigating the mass distributions produced by these models and extracting values of critical exponents. The specific conclusion is that the obtained values of tau are within the range expected for critical phenomena, i.e. around 2.3, and the grand conclusion is that phase changes and critical phenomena appear to be possible in small and fast breaking systems, such as in collisions between heavy ions MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 1219-7580 UR - ISI:000181859200009 L2 - critical phenomena;heavy-ion reactions;percolation;multi-fragmentation;GAS PHASE-TRANSITION; HEAVY-ION COLLISIONS; SYSTEM; MODEL SO - Acta Physica Hungarica New Series-Heavy Ion Physics 2003 ;17(1):59-73 7393 UI - 6679 AU - Barrera-Bassols N AU - Zinck A AD - Inst Ecol AC, Dept Ecol Vegetal, Xalapa 91000, Veracruz, MexicoInt Inst Geoinformat Sci & Earth Observ, Dept Earth Syst Anal, NL-7500 AA Enschede, NetherlandsBarrera-Bassols, N, Inst Ecol AC, Dept Ecol Vegetal, Km 2-5 Antigua Carretera Coatepec, Xalapa 91000, Veracruz, Mexico TI - 'Land moves and behaves': Indigenous discourse on sustainable land management in Pichataro, Patzcuaro basin, Mexico AB - An ethnoecological study was carried out in the Purhepecha community of San Francisco Pichataro, west central Mexico, with the purpose of investigating how land degradation, in terms of soil erosion and fertility depletion, was (and still is) handled by indigenous farmers so that traditional agriculture could remain sustainable over centuries. After briefly reviewing opposite views on the land degradation issue in the regional context of the Patzcuaro lake basin, the paper focuses on land management at local level. The indigenous concept of land is discussed as an integrated whole, including water cycle, climate, relief and soils. Indigenous people venerate land as the mother of all living beings, including humans. Therefore, people's health and survival require good land care and management. Local knowledge on land management is organized around four basic principles: land position, land behaviour, land resilience and land quality. Farmers recognize land as a dynamic subject, a concept reflected in the expression 'land moves and behaves'. Soil erosion and fertility depletion are perceived as 'normal' processes the farmers control by means of integrated management practices. Farmers recognize several land classes, primarily controlled by landscape position, which require different land care. The example of San Francisco Pichataro demonstrates that traditional agriculture does not necessarily lead to land degradation. But the collective knowledge, or social theory, on land management is increasingly exposed to be fragmented as the community undergoes structural changes and loses its social cohesion under the pressure of externalities such as off-farm activities, out-migrations and governmental intervention, among others MH - Mexico|Veracruz MH - Netherlands PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Geography, Physical;Geology U5 - J;Article AV - English IS - 0435-3676 UR - ISI:000187452900003 L2 - ethnopedology;indigenous people;local attitudes towards soil health;local land use systems;mountain landscapes;Mexico;LAKE PATZCUARO; AGRICULTURE; MICHOACAN; CLIMATE SO - Geografiska Annaler Series A-Physical Geography 2003 ;85A(3-4):229-245 7394 UI - 9407 AU - Barrera-Bassols N AU - Zinck JA AD - Int Inst Geoinformat Sci & Earth Observat, Soil Sci Div, NL-7500 AA Enschede, NetherlandsInst Ecol AC, Dept Ecol Vegetal, Jalapa 91000, Veracruz, MexicoZinck, JA, Int Inst Geoinformat Sci & Earth Observat, Soil Sci Div, POB 6, NL-7500 AA Enschede, Netherlands TI - Ethnopedology: a worldwide view on the soil knowledge of local people AB - Ethnopedology, a hybrid discipline nurtured by natural as well as social sciences, encompasses the soil and land knowledge systems of rural populations, from the most traditional to the modem. Using this statement as a starting point, the first part of the paper defines ethnopedology in terms of conceptual scope, methodological approaches and dominant research themes. Initially, classic ethnographic studies focused on the linguistic analysis of local soil and land classification systems, while the comparative approach aimed at establishing similarities and differences between local knowledge and scientific information. More recently, interest has shifted towards a more integrated approach, which recognizes the relevance of the cultural context in local sustainable land management. Ethnopedological research covers a wide diversity of topics centered around four main issues: (1) the formalization of local soil and land knowledge into classification schemes, (2) the comparison of local and technical soil classifications, (3) the analysis of local land evaluation systems, and (4) the assessment of agro-ecological management practices. In the second part of the paper, the current status of ethnopedology in a worldwide perspective is assessed from a compilation of 895 references, with respect to the abundance, distribution and diversity of ethnopedological studies (EPS). These EPS are distributed over 61 countries, mainly in Africa, America and Asia, and cover 217 ethnic groups. The geographical density of EPS is positively correlated with linguistic and biological diversities. Most EPS have been carried out in fragile agro-ecological zones, where communities living with limited resources have developed efficient land and water management systems to compensate for resource scarcity. Of the three main components of ethnopedology i.e. Corpus, Praxis and Kosmos-more attention has so far been given to local cognitive systems (Corpus) and local management systems (Praxis) than local belief and symbol systems (Kosmos). Shifting the research emphasis to the cosmovision of local peoples would improve the contribution of EPS to the formulation and implementation of rural development programmes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Veracruz MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Soil Science U5 - J;Article AV - English IS - 0016-7061 UR - ISI:000180439400002 L2 - ethnopedology;local people;local soil knowledge;worldwide review;INDIGENOUS SOIL; WATER CONSERVATION; CLASSIFICATION; MANAGEMENT; RESOURCE; SYSTEMS; SCIENCE; STATE; LAND; PERU SO - Geoderma 2003 ;111(3-4):171-195 7395 UI - 9195 AU - Barrera-Yanez E AU - Gilkey PB AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUniv Oregon, Dept Math, Eugene, OR 97403, USAMax Planck Inst Math Sci, D-04103 Leipzig, Germany TI - The eta invariant and the real connective K-theory of the classifying space for quaternion groups AB - We express the real connective K-theory groups (k) over tildeo(4k-1) (BQ(l)) of the quaternion group Q(l) of order l = 2(j) greater than or equal to 8 in terms of the representation theory of Q(l) by showing (k) over tildeo(4k-1) = (BQ(l)) (K) over tilde Sp(S4k+3/tau Q(l)) where tau is any fixed point free representation of Q(l) in U(2k + 2) MH - Germany MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0232-704X UR - ISI:000181043600005 L2 - quaternion spherical space form;eta invariant;symplectic K-theory;real connective K-theory;RIEMANNIAN GEOMETRY; SPECTRAL ASYMMETRY; FORMS SO - Annals of Global Analysis and Geometry 2003 ;23(2):173-188 7396 UI - 8537 AU - Barrios VAE AU - Petit A AU - Pla F AU - Najera RH AD - Dynasol Elastomeros SA CV, Ctr Invest & Desarrollo, Altamira 89600, Tamaulipas, MexicoEcole Natl Super Ind Chim, Inst Natl Polytech Lorraine, Lab Chim Phys Macromol, CNRS,UMR 7568, F-54001 Nancy, FranceEcole Natl Super Ind Chim, Inst Natl Polytech Lorraine, Lab Sci Genie Chim, CNRS,UPR 6811, F-54001 Nancy, FranceNatl Autonomous Univ Mexico, Fac Quim, Dept Polimeros, Mexico City 04510, DF, MexicoBarrios, VAE, Dynasol Elastomeros SA CV, Ctr Invest & Desarrollo, Carretera Tampico Mante Km 28-5, Altamira 89600, Tamaulipas, Mexico TI - Selective hydrogenation of butadiene-styrene copolymers using a Ziegler-Natta type catalyst 2. Thermal properties AB - Three types of butadiene-styrene copolymers, diblock, triblock and random, were partially hydrogenated in their elastomeric units in order to determine the influence of hydrogenation extent on their thermal properties. The hydrogenation reactions were carried out using a Ziegler-Natta type catalyst and the extent of hydrogenation was evaluated by FTIR spectroscopic technique. The percentage of crystallinity was determined by differential scanning calorimetry (DSC), considering the low density polyethylene (LDPE) as reference since the saturation of elastomeric units with low content of 1,2-vinyl bonds gives a structure which resembles to LDPE, thus semi-crystalline polymers were obtained. On the other hand, the glass transition temperature (T-g) for the hydrogenated and non-hydrogenated copolymers as well as their heat of fusion, were also determined by DSC. An equation to evaluate the T-g of partially hydrogenated random copolymers is proposed considering both the saturated and unsaturated fractions. The thermo-oxidative behaviour of certain hydrogenated and non-hydrogenated copolymers was evaluated by thermogravirnetric analyses (TGA). The results obtained by TGA suggest that a minimum saturation level is necessary in order to improve the thermo-oxidative resistance of the polymers. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000182788300009 L2 - homogeneous hydrogenation;thermal properties;anionic block and random copolymers;RUBBER SO - European Polymer Journal 2003 ;39(6):1151-1167 7397 UI - 6728 AU - Barrita FD AU - Bremner TW AU - Balcom BJ AD - Inst Politecn Nacl, CIDIR, Oaxaca, MexicoUniv New Brunswick, Dept Civil Engn, Fredericton, NB E3B 5A3, CanadaUniv New Brunswick, Dept Phys, MRI Ctr, Fredericton, NB E3B 5A3, CanadaBarrita, FD, Inst Politecn Nacl, CIDIR, Oaxaca, Mexico TI - Effects of curing temperature on moisture distribution, drying and water absorption in self-compacting concrete AB - Steam curing is normally used in the precast industry to increase the rate of strength development with the aim of reducing the cycle time and thereby increasing productivity. However there is concern about the durability of steam cured concrete elements, which is mainly determined by the quality of the cover concrete. In an effort to evaluate the effectiveness of curing at 50degreesC for several hours in producing durable concrete, compared to moist curing at 23 and 38degreesC for seven days, the moisture distribution of drying self-compacting concrete containing 30% fly ash, as well as the moisture distribution in water uptake experiments were studied using magnetic resonance imaging. The results of drying indicated an increased moisture loss in the cover concrete when the specimens were cured at 50degreesC. The water uptake experiments showed a higher penetration of the waterfront, higher sorptivity, and higher moisture diffusivity of concrete cured at 50degreesC compared to concrete which was moist cured at 38degreesC MH - Canada MH - Mexico|Oaxaca PB - LONDON: THOMAS TELFORD SERVICES LTD RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0024-9831 UR - ISI:000187162800005 L2 - PERFORMANCE SO - Magazine of Concrete Research 2003 ;55(6):517-524 7398 UI - 8296 AU - Barthou C AU - Duong PH AU - Oliver A AU - Cheang-Wong JC AU - Rodriguez-Fernandez L AU - Crespo-Sosa A AU - Itoh T AU - Lavallard P AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNCST, Inst Sci Mat, Hanoi, VietnamOsaka Univ, Grad Sch Engn Sci, Osaka 5608531, JapanUniv Paris 06, Phys Solides Grp, UMR 75 88, F-75251 Paris, FranceUniv Paris 07, Phys Solides Grp, UMR 75 88, F-75251 Paris, FranceOliver, A, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - Silicon nanocrystals and defects produced by silicon and silicon-and-gold implantation in silica AB - High-purity silica samples were implanted at room temperature with 2-MeV Si ions or sequentially with 2-MeV Si and 10-MeV Au ions. Three photoluminescence bands associated with the presence of defects are identified in the as-implanted samples. After a heat treatment at 1100 degreesC, a line appears at 750 nm in Si-implanted samples. This line is attributed to the emission from localized states in Si nanocrystals. At this temperature, the defects are only partially annealed. In the case of the samples implanted sequentially with Si and Au ions, the Si nanocrystal emission band appears, even without heat treatment. (C) 2003 American Institute of Physics MH - France MH - Japan MH - Mexico|Distrito Federal MH - Vietnam PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000183288900108 L2 - GREEN PHOTOLUMINESCENCE BAND; OPTICAL-ABSORPTION; SI NANOCRYSTALS; GLASS; QUARTZ; PL SO - Journal of Applied Physics 2003 ;93(12):10110-10113 7399 UI - 8055 AU - Bartnik R AU - Baylere P AU - Chrostowska A AU - Galindo A AU - Lesniak S AU - Pfister-Guillouzo G AD - Univ Lodz, Dept Organ & Appl Chem, PL-90136 Lodz, PolandUniv Pau & Pays Adour, Lab Phys Chim Mol, CNRS, UMR 5624, F-64000 Pau, FranceBUAP, Ctr Quim, Inst Ciencias, Puebla 72570, MexicoBartnik, R, Univ Lodz, Dept Organ & Appl Chem, Narutowicza 68, PL-90136 Lodz, Poland TI - Application of photoelectron spectroscopy to molecular properties, 65. Flash vacuum thermolysis of 1-azabicyclo[1.1.0]butanes. Photoelectron spectrum of 3-phenyl-2-azabuta-1,3-diene AB - The reaction behaviour of 1-azabicyclo[1.1.0]butanes under flash vacuum thermolysis (FVT) conditions was studied. It has been found that the thermal rearrangement of title compounds produces unstable 2-aza-1,3-dienes. The formation of these products was established by reduction, by Diels-Alder reactions and by UV photoelectron spectroscopy. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) MH - France MH - Mexico|Puebla MH - Poland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000183969000014 L2 - flash pyrolysis;ionisation potentials;photoelectron spectroscopy;quantum mechanical calculations;small ring systems;DENSITY; 1-AZABICYCLO<1.1.0>BUTANES; CHEMISTRY; EXCHANGE; SERIES SO - European Journal of Organic Chemistry 2003 ;(13):2475-2479 7400 UI - 7019 AU - Bartov E AU - Romero RM AU - Yeshurun I AU - Quiroz-Mercado H AD - Edith Wolfson Med Ctr, Holon, IsraelTel Aviv Univ, Sackler Fac Med, Holon, IsraelUniv Nacl Autonoma Mexico, Hosp Dr Luis Sanchez, IAP, Asociac Para Evitar Ceguera Mexico, Mexico City 04030, DF, Mexico TI - Foveal choroido-scleral exbrication: A new method for macular translocation MH - Israel MH - Mexico|Distrito Federal PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607000445 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U90-U90 7401 UI - 7017 AU - Bartsch DUG AU - Gomez L AU - Sherman-Villafane J AU - Bessho K AD - UCSD, Shiely Eye Ctr, La Jolla, CA, USACODET, Tijuana, Mexico TI - Reproducibility of whole eye aberration measurement by laser ray tracing and skiascopy MH - Mexico|Baja California MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607000010 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U2-U2 7402 UI - 7670 AU - Basilakos S AU - Plionis M AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceINAOE, Puebla 72000, MexicoBasilakos, S, Natl Observ Athens, Inst Astron & Astrophys, I Metaxa 7 B Pavlou, Athens 15236, Greece TI - Galaxy bias in quintessence cosmological models AB - We derive the evolution of the linear bias factor, b(z), in cosmological models driven by an exotic fluid with an equation of state, p(x) = wrho(x), where -1 less than or equal to w < 0 (quintessence). Our aim is to put constrains on different cosmological and biasing models by combining the recent observational clustering results of optical (2dF) galaxies (Hawkins et al.) with those predicted by the models. We find that when fitted to the 2dF clustering results, our bias model predicts different bias evolution for different values of w. The models that provide the weak biasing (b(0) &SIM; 1.1) of optical galaxies found in many recent observational studies are flat, &UOmega;(m) = 0.3 with w &LE; -0.9. These models, however, predict a weak redshift evolution of b(z), not corroborated by N-body simulations MH - Greece MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000184823900001 L2 - cosmology : theory;large-scale structure of universe;DARK-MATTER HALOES; HUBBLE-DEEP-FIELD; REDSHIFT EVOLUTION; BACKGROUND ANISOTROPIES; UNIVERSE; FLUCTUATIONS; CONSTRAINTS; SUPERNOVAE; CONSTANT; DENSITY SO - Astrophysical Journal 2003 ;593(2):L61-L64 7403 UI - 7444 AU - Basiuk EV AU - Basiuk VA AU - Shabel'nikov VP AU - Golovatyi VG AU - Flores JO AU - Saniger JM AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Acad Sci Ukraine, LV Pisarzhevsky Phys Chem Inst, UA-03039 Kiev, UkraineBasiuk, EV, Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Reaction of silica-supported fullerene C-60 with nonylamine vapor AB - The reaction of silica-supported [60]fullerene with vaporous nonylamine at 150 degreesC produces a mixture of addition products. Quantum chemical calculations, at the B3LYP/STO-3G level of theory, support that the addition reaction most likely takes place across the 6,6 bonds of C-60 pyracyclene units (and not across the 5,6 bonds). Numerous peaks were found in high-performance liquid chromatograms, apparently due to a large number of possible isomers. According to elemental analysis data (C:N ratio), the number of nonylamine molecules attached to C-60 is 3 on average. Thermogravimetric analysis of the nonylamine adduct showed two weight losses, one between 360 and 590 degreesC due to thermal decomposition of nonylamine moieties, and one between 725 and 840 degreesC due to decomposition of the remaining fullerene-derived carbonized material. Field-desorption mass spectrometric study revealed a number of molecular and fragment ions corresponding to the adducts with up to six nonylamine moieties attached to [60]fullerene; some of them were observed as multiply-charged ions. The temperature behavior of these peaks is similar to that for TGA, with maxima shifted to lower temperatures due to the cooperative effect of the strong electric field C-60 can be partially regenerated by pyrolysis of the nonylamine adduct, although at very low yields (below 1%, after heating at 350 degreesC under air for 2 h). (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000185519700015 L2 - fullerene;chemical treatment;heat treatment;infrared spectroscopy;mass spectrometry;PERFORMANCE LIQUID-CHROMATOGRAPHY; INFRARED-SPECTROSCOPY; ALIPHATIC-AMINES; C-70; <60>FULLERENE; DERIVATIVES; POLYMERS; DENSITY; ADDUCT; PHASE SO - Carbon 2003 ;41(12):2339-2346 7404 UI - 7679 AU - Basolo AL AU - Alcaraz G AD - Univ Nebraska, Sch Biol Sci, Lincoln, NE 68510, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoBasolo, AL, Univ Nebraska, Sch Biol Sci, Lincoln, NE 68510, USA TI - The turn of the sword: length increases male swimming costs in swordtails AB - Sexual selection via female mate choice can result in the evolution of elaborate male traits that incur substantial costs for males. Despite increased interest in how female mating preferences contribute to the evolution of male traits, few studies have directly quantified the locomotor costs of such traits. A sexually selected trait that could affect movement costs is the sword exhibited by male swordtail fishes: while longer swords may increase male mating success, they could negatively affect the hydrodynamic aspects of swimming activities. Here, we examine the energetic costs of the sword in Xiphophorus montezumae by experimentally manipulating sword length and measuring male aerobic metabolism during two types of activity, routine swimming and courtship swimming. Direct measurements of oxygen consumption indicate that males with longer swords expend more energy than males with shortened swords during both types of swimming. In addition, the sword increases the cost of male courtship. Thus, while sexual selection via female choice favours long swords, males with longer swords experience higher metabolic costs during swimming, suggesting that sexual and natural selection have opposing effects on sword evolution. This study demonstrates a hydrodynamic cost of a sexually selected trait. In addition, this study discriminates between the cost of a sexually selected trait used in courtship and other courtship costs MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 17 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000184689100013 L2 - sword;courtship;locomotor costs;energetics;swimming activity;VARIABLE FIELD CRICKET; SEXUAL SELECTION; FEMALE PREFERENCE; ENERGETIC COST; POECILIA-RETICULATA; XIPHOPHORUS-HELLERI; PREEXISTING BIAS; TAIL STREAMER; SAGE GROUSE; PERFORMANCE SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2003 ;270(1524):1631-1636 7405 UI - 8308 AU - Bassol S AU - Alvarado G AU - Arreola RG AU - Celis-Gonzalez C AU - Pena EP AU - Flores JG AU - Ahued JR AU - Ricalde RL AU - Lopez CR AU - Prieto G AU - Gurucharri C AU - Heredia MG AU - Ortiz OC AU - Percossi G AU - Casa PRF AU - Botto E AU - Tozzini RI AU - Botti G AU - de Pierro AN AU - Fernandez M AU - Lastreto E AU - Nanez M AU - de Oliveira HC AU - Yazlle MEDH AU - Silva J AU - Calazar G AU - Gomez J AU - Penagos G AU - Cifuentes R AU - Torres LA AU - Reyes-Marquez R AU - Albrecht G AD - Univ Coahuila, Biomed Res Ctr, Torreon, Coahuila, MexicoCtr Estrateg Conad Latinoamer S A de C V Mexico, Mexico City, DF, MexicoDel Valle Univ Hosp, Cali, ColombiaSan Paul Univ Hosp, Medellin, ColombiaSan Jose Univ Hosp, Bogota, ColombiaClin Country, Bogota, ColombiaSan Ignacio Univ Hosp, Bogota, ColombiaUniv Sao Paulo, Med Sch Ribeirao Preto, Sao Paulo, BrazilUniv State Rio de Janeiro, Univ Hosp, Rio De Janeiro, BrazilJunin Private Clin, Ginaecol Serv, Cordova, ArgentinaFernandez Hosp, Ginaecol Serv, Buenos Aires, DF, ArgentinaUniv Nacl Rosario, Hosp Centenario, Sch Med, Ctr Human Reprod,Ginaecol Serv, RA-2000 Rosario, Santa Fe, ArgentinaUniv Buenos Aires, Jose de San Martin Hosp Clin, Sch Med, Ginaecol Serv, Buenos Aires, DF, ArgentinaUniv Buenos Aires, Bernardino Rivadavia Hosp, Sch Med, Ginaecol Serv, Buenos Aires, DF, ArgentinaModel Inst Ginaecol & Obstet, IMCO, Cordova, ArgentinaNatl Inst Perinatol, Mexico City, DF, MexicoCtr Human Reprod Attendance, Mexico City, DF, MexicoOccident Med Inst, Guadalajara, Jalisco, MexicoIMSS, Gineobstet Hosp, Castelazo Ayala, Mexico City, DF, MexicoJuarez Univ Durango, Res Inst, Reprod Hlth Dept, Durango, MexicoGinaecol Serv Sanez Pena, Rosario, Santa Fe, ArgentinaBassol, S, Univ Coahuila, Biomed Res Ctr, Calle Gregorio A Garcia 198 Sur, Torreon, Coahuila, Mexico TI - A 13-month multicenter clinical experience of a low-dose monophasic oral contraceptive containing 20 mu g ethinylestradiol and 75 mu g gestodene in Latin American women AB - This prospective, multicenter study was conducted to evaluate the contraceptive reliability, cycle control and tolerability of a 21-day oral contraceptive regimen containing 20 mug ethinylestradiol and 75 mug gestodene in four Latin American countries (Mexico, Argentina, Brazil and Colombia). Participants took trial medication daily for 21 days. Contraceptive efficacy, cycle control and tolerability were evaluated over a period of 13 cycles. Efficacy data gathered from 5,109 treatment cycles were obtained from 393 participants. The trial medication proved to be an effective contraceptive and provided good cycle control. One pregnancy because of poor compliance was recorded. This resulted in a study Pearl index of 0.25. Forty-six percent of Latin American women reported one intracyclic spotting bleeding episode and 37.6% reported one intracyclic breakthrough bleeding (medium/excessive bleeding) episode during cycles 2-4 (primary target). Overall, intracyclic bleeding was reported in 41%. Overall, there was a trend towards a lower incidence of spotting in all the countries and this difference had statistical significance between Argentina and the others three countries (p < 0.05) during cycles 2-4. This trend was also apparent with respect to breakthrough bleeding, but again the difference did not achieve statistical significance. The discontinuation rate because of adverse events was low (3%); no serious adverse events were reported. More than 78% of the women in the four countries maintained constant body weight or lost weight (2 kg) during the study. The treatment effect on blood pressure was negligible. There were no appreciable changes in mean laboratory values over the course of the study. (C) 2003 Elsevier Inc. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Mexico|Durango MH - Mexico|Jalisco PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000183295500006 L2 - oral contraceptives;ethinylestradiol;gestodene;contraceptive efficacy;cycle controls tolerability;CYCLE CONTROL; THROMBOEMBOLIC DISEASE; ETHINYL ESTRADIOL; EFFICACY; TOLERABILITY; DESOGESTREL; TOLERANCE; RESPECT SO - Contraception 2003 ;67(5):367-372 7406 UI - 8327 AU - Bastiaans MJ AU - Wolf KB AD - Tech Univ Eindhoven, Fac Elektrotech, NL-5600 MB Eindhoven, NetherlandsUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoBastiaans, MJ, Tech Univ Eindhoven, Fac Elektrotech, POB 513, NL-5600 MB Eindhoven, Netherlands TI - Phase reconstruction from intensity measurements in linear systems AB - The phase of a signal at a plane is reconstructed from the intensity profiles at two close parallel screens connected by a small abcd canonical transform, this applies to propagation along harmonic and repulsive fibers and in free media. We analyze the relationship between the local spatial frequency (the signal phase derivative) and the derivative of the squared modulus of the signal under a one-parameter canonical transform with respect to the parameter. We thus generalize to all linear systems the results that have been obtained separately for Fresnel and fractional Fourier transforms. (C) 2003 Optical Society of America MH - Mexico|Morelos MH - Netherlands PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000183131500009 L2 - FRACTIONAL FOURIER; CANONICAL TRANSFORMATIONS; RECURSIVE ALGORITHM; RETRIEVAL; EQUATION; DOMAIN SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2003 ;20(6):1046-1049 7407 UI - 8342 AU - Batina N AU - Manzano-Martinez JC AU - Andersen SI AU - Lira-Galeana C AD - Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, MexicoInst Mexicano Petr, Thermodynam Res Lab, Mexico City 07730, DF, MexicoTech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkBatina, N, Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Av Michoacan & Purisima,AP 55-5340, Mexico City 09340, DF, Mexico TI - AFM characterization of organic deposits on metal substrates from Mexican crude oils AB - Atomic force microscopy (AFM) has been used to investigate eight different Mexican crude oils in the form of deposited films on metal substrate. Most oils had reported asphaltene deposition problems during production. Two other techniques related to hydrodynamic size determination were applied: light scattering and HPLC-SEC. According to the observed AFM surface morphology characteristics oil films were classified and grouped into distinct groups. Some had dense population of 40-200 nm particles, while others had larger discoid features and smaller particles. Light scattering analysis indicates observed particles to be organic as they disappear upon dilution with toluene. Correlation between the oil film AFM morphology and physicochemical properties of the oil did not reveal a simple relationship. Indeed, oils with similar bulk fluid properties show different morphology as films. With respect to the crude oil instability and the well-deposition problem, it was found that five of the investigated oils (unstable) with known problems of asphaltene deposition during production, contain spherical or discoid nanoparticles in the range of 35 to 500 nm. Films prepared from the stable oils possess apparent two-dimensional (2D) characteristics (spread over the substrate) without particular features. Detail of AFM analysis show that oil instability can be related to films and oils with higher density of particles, and films with larger particles. It emphasizes AFM, as a technique potentially useful for the well-deposition problem detection. HPLC-SEC data show that oils from similar geographic zones have similar fluid properties in terms of composition and hydrodynamic size distribution but on the other hand could display different AFM morphology features. The results show that AFM is a promising tool for the oil film characterization and determination of surface properties, which may leads to development of a better understanding of well-deposition and adherence MH - Denmark MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000183089500003 L2 - ATOMIC-FORCE MICROSCOPY; SCANNING-TUNNELING-MICROSCOPY; PETROLEUM ASPHALTENES; EVAPORATION RATES; CARBON ELECTRODES; GLASSY-CARBON; MORPHOLOGY; SURFACES; PRESSURE; FLUIDS SO - Energy & Fuels 2003 ;17(3):532-542 7408 UI - 7347 AU - Batle J AU - Casas M AU - de Llano M AU - Fortes M AU - Sevilla FJ AD - Univ Illes Balears, Dept Fis, Palma de Mallorca 01722, SpainUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBatle, J, Univ Illes Balears, Dept Fis, Palma de Mallorca 01722, Spain TI - Generalized BCS-Bose crossover picture of superconductivity AB - A recent unification of the BCS theory with that of the Bose-Einstein condensation (BEC) through a "complete" boson-fermion model is discussed as a generalization of the "BCS-Bose crossover" picture of superconductivity. Good first-principles T, predictions in 2D are calculated with no adjustable parameters for the so-called "exotic" cuprate superconductors of the "Uemura plot", without abandoning the phonon interaction mechanism. The only condition is that one depart moderately from the perfect electron-/hole-Cooper-pair symmetry to which BCS (as well as the "crossover") theory are restricted by construction MH - Mexico|Distrito Federal MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9792 UR - ISI:000185634600009 L2 - COOPER PAIRS; EINSTEIN SO - International Journal of Modern Physics B 2003 ;17(18-20):3271-3276 7409 UI - 8721 AU - Batlle X AU - Hattink BJ AU - Labarta A AU - Akerman JJ AU - Escudero R AU - Schuller IK AD - Univ Barcelona, Fac Fis, Dept Fis Fonamental, E-08028 Barcelona, Catalonia, SpainUniv Calif San Diego, Phys Dept 0319, La Jolla, CA 92093, USAUNAM, IIM, Mexico City 70360, DF, MexicoBatlle, X, Univ Barcelona, Fac Fis, Dept Fis Fonamental, Ave Diagonal 647, E-08028 Barcelona, Catalonia, Spain TI - The oxidation state at tunnel junction interfaces AB - The oxidation state at the interfaces of Nb/Al-AlOx/Pb junctions is discussed. Conductance-voltage curves below and above the superconducting temperature suggest tunneling conduction, while X-ray photoelectron spectroscopy shows the existence of a thin AlOx layer at the Nb/Al interface. We demonstrate that at the usual 10(-7) Torr range of base pressures in the sputtering chamber, this is due to the time elapsed between the deposition of the Nb and Al bottom layers, in both Nb/Al-AlOx/Pb tunnel junctions and Nb/Al bilayers. We also give some direct evidence of the oxidation of the top Pb electrode on the Nb electrode surface. Such oxidation probably occurs at the pinholes of the intermediate Al-AlOx layer of the tunnel junctions, as a consequence of the oxidation state at the Nb/Al interface, which helps to avoid barrier shorts and enhances the quality of the tunnel barrier. We therefore suggest that there is oxide formation in other places besides where there is an actual oxide deposited. This is relevant for the performance of magnetic tunnel junctions since in most tunneling studies it is assumed that once the oxide is deposited, that is the only place where there is an oxide. This is also a very general statement applicable to thin film systems. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000182069300011 L2 - tunnel junctions;oxidation at interfaces;X-ray photoelectron spectroscopy;BARRIERS; MAGNETORESISTANCE; TEMPERATURE; RESISTANCE; BILAYERS SO - Journal of Magnetism and Magnetic Materials 2003 ;260(1-2):78-83 7410 UI - 7033 AU - Bauer-Christoph C AU - Christoph N AU - guilar-Cisneros BO AU - Lopez MG AU - Richling E AU - Rossmann A AU - Schreier P AD - Univ Wurzburg, Lehrstuhl Lebensmittelchem, D-97074 Wurzburg, GermanyBayer Landesamt Gesundheit & Lebensmittelsicherhe, D-97082 Wurzburg, GermanyIPN, Ctr Invest & Estudios Avanzados, Unidad Biotecnol & Ingn Genet Plantas, Irapuato 36500, Gto, MexicoIsolab GmbH Lab Stabile Isotope, D-85301 Schweitenkirchen, GermanySchreier, P, Univ Wurzburg, Lehrstuhl Lebensmittelchem, D-97074 Wurzburg, Germany TI - Authentication of tequila by gas chromatography and stable isotope ratio analyses AB - Gas chromatographic (GC) determination of volatile constituents and isotope ratio mass spectrometry (IRMS) analysis of C-13/C-12 isotope ratios as well as SNIF-NMR analysis of (D/H)-ratios of ethanol in authentic (n=12) and commercial tequila samples (n=13) were used to differentiate analytically between tequila derived from 100% agave (Agave tequilana Weber var. Azul) and tequila produced with other fermentable sugars ('mixed' tequila). Evaluating the correlation of methanol and 2-/3-methyl-1-butanol concentrations, GC analysis was found to be a suitable method for the authenticity assessment of '100% agave' and 'mixed' tequilas. Additional determinations of delta(13)C(VPDB) and (D/H) ratios of ethanol were used to show the perspectives and limits of the methods MH - Germany MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1438-2377 UR - ISI:000186464400013 L2 - agave (Agave tequilana Weber var. Azul);authentication;tequila volatiles;gas chromatography;stable isotope ratio analysis;IRMS;SNIF-NMR SO - European Food Research and Technology 2003 ;217(5):438-443 7411 UI - 7240 AU - Bautista-Banos S AU - Hernandez-Lopez M AU - Bosquez-Molina E AU - Wilson CL AD - Inst Politecn Nacl Carr, Ctr Desarrollo Prod, San Isidro Yautepec 62731, Morelos, MexicoInst Politecn Nacl Carr, Ctr Desarrollo Prod Bioticos, San Isidro Yautepec 62731, Morelos, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoUSDA ARS, Appalachian Fruit Res Stn, Kearneysville, WV 25430, USABautista-Banos, S, Inst Politecn Nacl Carr, Ctr Desarrollo Prod, Yautepec Jojutla Km 8-5, San Isidro Yautepec 62731, Morelos, Mexico TI - Effects of chitosan and plant extracts on growth of Colletotrichum gloeosporioides, anthracnose levels and quality of papaya fruit AB - The objectives of this research were to evaluate the in vitro fungicidal effect of chitosan and aqueous extracts of custard apple leaves, papaya leaves and papaya seeds; and the combination of chitosan and plant extracts on the development of Colletotrichum gloeosporioides, which causes anthracnose on papaya. Chitosan at 2.0% and 3.0% had a fungicidal effect on C. gloeosporioides. Extracts alone did not show any fungicidal effect while the combination of 2.5% chitosan with all the tested extracts had a fungistatic rather than fungicidal effect. Changes in the conidial morphology of C. gloeosporioides were observed with 1.5% chitosan concentration after 7 h incubation. For in situ studies, control of anthracnose disease was obtained with 1.5% chitosan applied before C. gloeosporioides inoculation. Phomopsis was most frequently isolated from the non-inoculated fruit. Chitosan applications did not influence the content of total solid solubles or percentage weight loss during the storage of papaya fruit. However, there was a tendency toward greater firmness in fruit treated with the papaya seed extract alone or combined with chitosan. (C) 2003 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 18 U4 - Agronomy U5 - J;Article AV - English IS - 0261-2194 UR - ISI:000185948800002 L2 - Carica papaya;Colletotrichum gloeosporioides;papaya extract;custard apple extract;natural compounds;BELL PEPPER FRUIT; CYTOCHEMICAL ASPECTS; STRAWBERRY FRUIT; BOTRYTIS-CINEREA; ROOT-ROT; STORAGE; CROWN SO - Crop Protection 2003 ;22(9):1087-1092 7412 UI - 8174 AU - Bautista-Banos S AU - Garcia-Dominguez E AU - Barrera-Necha LL AU - Reyes-Chilpa R AU - Wilson CL AD - Inst Politecn Nacl, Ctr Desarrollo Prod Biot, San Isidro Yautepec 62731, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, MexicoUSDA ARS, Appalachian Fruit Res Stn, Kearneysville, WV 25430, USABautista-Banos, S, Inst Politecn Nacl, Ctr Desarrollo Prod Biot, Carr Yautepec Jojutla Km 8-5, San Isidro Yautepec 62731, Morelos, Mexico TI - Seasonal evaluation of the postharvest fungicidal activity of powders and extracts of huamuchil (Pithecellobium dulce): action against Botrytris cinerea, Penicillium digitatum and Rhizopus stolonifer of strawberry fruit AB - The fungistatic or fungicidal effect of powders, and aqueous and ethanolic extracts of seeds, and monthly harvested leaves of huamuchil (Pithecellobium dulce) were evaluated for fungicidal activity, against Botrytis cinerea, Penicillium digitatum, and Rhizopus stolonifer. Fungicidal activity of huamuchil powders and aqueous extracts were also evaluated on strawberry fruit during storage. Preliminary characterization of the active compound responsible for the fungicidal effect was carried out using thin layer chromatography and spectrophotometry. Results indicated that powders had the best fungicidal effect, in both in vitro and in situ studies. Fungistatic or fungicidal properties were associated with the plant organ and harvest month. A correlation between high absorbance values of extracts with the fungicidal or fungistatic effect was not observed. The highest fungistatic or fungicidal effect for both in vitro and in situ studies was recorded from extracts of leaves harvested in months having more stressful environmental conditions; the cold season (October-February) and, the dry, hot season (April and June). Attempts to characterize the active compound suggest that kaempferol may be responsible for the fungicidal effect. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000183595400009 L2 - Fragaria x ananassa Duch.;Guaymochil;Tamarind;kaempferol;COASTAL REDWOOD; DISEASES; GROWTH; LEAVES SO - Postharvest Biology and Technology 2003 ;29(1):81-92 7413 UI - 7823 AU - Bautista R AU - Zhang YB AD - UNAM, Math Inst, Unidad Morelia, Morelia 58089, Michoacan, MexicoBeijing Normal Univ, Dept Math, Beijing 100875, Peoples R ChinaBautista, R, UNAM, Math Inst, Unidad Morelia, Apartado Postal 61-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Representations of a k-algebra over the rational functions over k AB - For Lambda a finite-dimensional k-algebra, k a field, we study the relations between the category of all left Lambda-modules, Mod Lambda, and the category of finitely generated Lambda circle times(k) k(x) = Lambda(k(x))-modules, mod Lambda(k(x)). In particular, we consider those G is an element of mod Lambdak((x)) such that (Lambda)G is indecomposable. We prove that such modules are in the mouth of components in mod Lambda(k(x)) which are tubes or have the shape ZA(infinity), ZD(infinity), or ZB(infinity). (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Michoacan MH - Peoples R China PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000184522800017 L2 - BASE FIELD EXTENSION; GENERIC MODULES; TAME ALGEBRAS SO - Journal of Algebra 2003 ;267(1):342-358 7414 UI - 7157 AU - Bazan-Perkins B AU - Flores-Soto E AU - Barajas-Lopez C AU - Montano LM AD - INER, Dept Invest Asma, Mexico City 14080, DF, MexicoQueens Univ, Dept Anat & Cell Biol, Kingston, ON K7L 3N6, CanadaUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoMontano, LM, INER, Dept Invest Asma, Mexico City 14080, DF, Mexico TI - Role of sarcoplasmic reticulum Ca2+ content in Ca2+ entry of bovine airway smooth muscle cells AB - Depletion of intracellular Ca2+ stores induces the opening of an unknown Ca2+ entry pathway to the cell. We measured the intracellular free-Ca2+ concentration ([Ca2+]i) at different sarcoplasmic reticulum (SR) Ca2+ content in fura-2-loaded smooth muscle cells isolated from bovine tracheas. The absence of Ca2+ in the extracellular medium generated a time-dependent decrement in [Ca2+]i which was proportional to the reduction in the SR-Ca2+ content. This SR-Ca2+ level was indirectly determined by measuring the amount of Ca2+ released by caffeine. Ca2+ restoration at different times after Ca2+-free incubation (2, 4, 6 and 10 min) induced an increment of [Ca2+]i. This increase in [Ca2+]i was considered as Ca2+ entry to the cell. The rate of this entry was slow (similar to0.3 nM/s) when SR-Ca2+ content was higher than 50% (2 and 4 min in Ca2+-free medium), and significantly (p<0.01) accelerated (>1.0 nM/s) when SR-Ca2+ content was lower than 50% (6 and 10 min in Ca2+-free medium). Thapsigargin significantly induced a higher rate of this Ca2+ entry (p<0.01). Variations in Ca2+ influx after SR-Ca2+ depletion were estimated more directly by a Mn2+ quench approach. Ca2+ restoration to the medium 4 min after Ca2+ removal did not modify the Mn2+ influx. However, when Ca2+ was added after 10 min in Ca2+-free medium, an increment of Mn2+ influx was observed, corroborating an increase in Ca2+ entry. The fast Ca2+ influx was Ni2+ sensitive but was not affected by other known capacitative Ca2+ entry blockers such as La3+, Mg2+, SKF 96365 and 2-APB. It was also not affected by the blockage of L-type Ca2(+) channels with methoxyverapamil or by the sustained K+-induced depolarisation. The slow Ca2+ influx was only sensitive to SKF 96365. In conclusion, our results indicate that in bovine airway smooth muscle cells Ca2+ influx after SR-Ca2+ depletion has two rates: A) The slow Ca2+ influx, which occurred in cells with more than 50% of their SR-Ca2+ content, is sensitive to SKF 96365 and appears to be a non-capacitative Ca2+ entry; and B) The fast Ca2+ influx, observed in cells with less than 50% of their SR-Ca2+ content, is probably a capacitative Ca2+ entry and was only Ni2+-sensitive MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000186038200006 L2 - airways smooth muscle;capacitative Ca2+ entry;passive Ca2+entry;sarcoplasmic reticulum Ca2+ content;SKF 96365, Ni2+;2-AMINOETHOXYDIPHENYL BORATE 2-APB; BRONCHIAL SUSTAINED CONTRACTION; INTRACELLULAR CA2+; CALCIUM-ENTRY; ENDOPLASMIC-RETICULUM; ENDOTHELIAL-CELLS; CA2+-FREE MEDIUM; MAST-CELLS; I-CRAC; RELEASE SO - Naunyn-Schmiedebergs Archives of Pharmacology 2003 ;368(4):277-283 7415 UI - 9353 AU - Beard CB AU - Pye G AU - Steurer FJ AU - Rodriguez R AU - Campman R AU - Peterson AT AU - Ramsey J AU - Wirtz RA AU - Robinson LE AD - Ctr Dis Control & Prevent, Atlanta, GA, USATexas Dept Hlth, Harlingen, TX, USACameron Cty Htlh Dept, San Benito, TX, USAUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAInst Nacl Salud Publ Cuernavaca, Ctr Invest Enfermedades Infecciosas, Cuernavaca, Morelos, MexicoBeard, CB, Ctr Dis Control & Prevent, Div Parasit Dis, 4770 Buford Highway, Chamblee, GA 30341 USA TI - Chagas disease in a domestic transmission cycle in southern Texas, USA AB - After three dogs died from acute Chagas cardiomyopathy at one location, an investigation was conducted of the home, garage, and grounds of the owner. A serologic study was conducted on stray dogs, and an ecologic niche model was developed to predict areas where the vector Triatoma gerstaeckeri might be expected MH - USA MH - Mexico|Morelos PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 20 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000180503300016 L2 - TRYPANOSOMA-CRUZI SO - Emerging Infectious Diseases 2003 ;9(1):103-105 7416 UI - 7542 AU - Beatty MF AU - Elias-Zuniga A AD - Univ Nebraska, Dept Engn Mech, Lexington, KY 40591, USAInst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan, Monterrey 64849, NL, MexicoBeatty, MF, Univ Nebraska, Dept Engn Mech, POB 910215, Lexington, KY 40591 USA TI - Stress-softening effects in the vibration of a non-Gaussian rubber membrane AB - The Mullins effect in the small amplitude transverse vibration of a stretched rubber membrane is investigated. The fundamental frequency, which decreases with increasing softening, is determined for a specific class of stress-softening materials. Analytical relations for the membrane vibration frequency are illustrated graphically for three phenomenological models and two kinds of non-Gaussian molecular network models for rubber elasticity The results demonstrate the role of the material parameters and, although no experimental data for the vibration of a rubber membrane currently are known, the theoretical predictions are characteristic of the frequency-stretch response reported in vibration experiments on rubber cords MH - USA MH - Mexico|Nuevo Leon PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Mathematics, Interdisciplinary Applications;Mechanics U5 - J;Article AV - English IS - 1081-2865 UR - ISI:000185195200003 L2 - mullins effect;non-Gaussian networks;rubber elasticity;membrane vibrations;TRANSVERSE VIBRATION; MODEL; DAMAGE SO - Mathematics and Mechanics of Solids 2003 ;8(5):481-495 7417 UI - 8259 AU - Beaver JS AU - Rosas JC AU - Myers J AU - Acosta J AU - Kelly JD AU - Nchimbi-Msolla S AU - Misangu R AU - Bokosi J AU - Temple S AU - rnaud-Santana E AU - Coyne DP AD - Univ Puerto Rico, Dept Agron & Soils, Mayaguez, PR 00681, USAEscuela Agr Panamer, Dept Agr Sci & Prod, Tegucigalpa, HondurasOregon State Univ, Dept Hort, Corvallis, OR 97331, USAINIFAP, Chapingo 56230, Edo Mexico, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USASokoine Univ Agr, Dept Crop Sci & Prod, Morogoro, TanzaniaBunda Coll Agr, Lilongwe, MalawiUniv Calif Davis, Dept Agron & Range Sci, Davis, CA 95616, USACESIAF, San Juan De La Maguana, Dominican RepUniv Nebraska, Dept Hort, Lincoln, NE 68583, USABeaver, JS, Univ Puerto Rico, Dept Agron & Soils, POB 9030, Mayaguez, PR 00681 USA TI - Contributions of the Bean/Cowpea CRSP to cultivar and germplasm development in common bean AB - Disease and abiotic stress are important factors limiting bean production wherever beans are grown. The development of bean cultivars having resistance to these stresses is a cost-effective and sustainable means to address these constraints. During the past 20 years, the Bean/Cowpea Collaborative Research Support Project (B/C CRSP) has supported common bean cultivar development and germplasm improvement programs in the USA and developing countries. Plant breeders have developed and released in Central America and the Caribbean bean cultivars and germplasm with one or more of the following traits; resistance to bean golden yellow mosaic virus (BGYMV), bean common mosaic necrotic virus (BCMNV), rust, web blight and common bacterial blight (CBB) and greater tolerance to high temperatures. In the highlands of Mexico and Ecuador bean cultivars with resistance to anthracnose, rust, root rots and bean common mosaic virus (BCMV), greater biological nitrogen fixation and improved adaptation to intermittent drought have been released. The bean breeding programs in East Africa have developed and released bean cultivars and germplasm with resistance to BCMNV, rust and bruchid seed weevils. Participation in the B/C CRSP has permitted USA bean breeding programs to develop and release bean cultivars and germplasm with resistance to BGYMV, BCMNV, anthracnose, rust, CBB, architectural avoidance to white mold and greater yield potential. Numerous plant breeders, plant pathologists and agronomists from developing countries have received advanced degree training in the USA, which has enhanced the capacity to develop improved bean cultivars for Latin America and Africa. The lack of sustainable seed production and delivery systems continues to limit the impact of the release of improved bean cultivars in many parts of Latin America and East Africa. (C) 2003 Elsevier Science B.V. All rights reserved MH - Dominican Rep MH - Honduras MH - Malawi MH - Mexico|Estado De Mexico MH - USA MH - Tanzania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Review AV - English IS - 0378-4290 UR - ISI:000183397900003 L2 - Phaseolus vulgaris;BGYMV;BCMV;rust;anthracnose;yield;abiotic stress;drought;heat tolerance;bean cultivars;GOLDEN MOSAIC-VIRUS; PHASEOLUS-VULGARIS L; ASHY STEM BLIGHT; YIELD STABILITY; WEB BLIGHT; COLLETOTRICHUM-LINDEMUTHIANUM; PLANT ARCHITECTURE; BACTERIAL-BLIGHT; LEAF PUBESCENCE; DROUGHT STRESS SO - Field Crops Research 2003 ;82(2-3):87-102 7418 UI - 8059 AU - Becerra-Munoz S AU - Buelna-Osben HR AU - Catalan-Romero JM AD - CIIDIR, IPN, Jiquilpan 59510, Michoacan, MexicoBecerra-Munoz, S, 5250 S Rainbow Blvd,2019, Las Vegas, NV 89118, USA TI - Spatial patterns of ARIMA modeled rates of change of atherinids (Chirostoma spp.) and goodeid Chapalichthys encaustus from Lake Chapala, Mexico AB - We implemented the first systematic sampling fish survey from June 1997 to February of 1999 in Lake Chapala. Atherinid (Chirostoma spp.) and "pintilla" goodeid Chapalichthys encaustus mean densities ranged between 0.11-2.15 and 0.04-2.92 fish/m(3), respectively. Atherinids reached maximum densities of 4.28 fish/m(3) near Ajijic city and "pintilla" goodeids peaked at 12.28 fish/m(3) near the municipal discharge of Jocotepec City. Shifts from atherinid dominant to "pintilla" goodeid dominant were detected in areas influenced by municipal discharges from Jocotepec, Ajijic, Chapala and Tizapan cities, and Lerma River inflow. Municipal discharges induced shifts in fish community structure by reducing the abundance of the more profitable atherinids to a level where less profitable goodeids increased in the fish community. Time series modeling of non-stationary atherinid and "pintilla" goodeid density and biomass series revealed two patterns of dynamics in Lake Chapala. We found density-independent Integrated Moving Average (IMA) models for atherinid rates of change in areas influenced by municipal discharges from Jocotepec, Ajijic, Chapala and Tizapan cities, and Lerma River inflow. MA parameters (theta(1)) indicated random-shock environmentally-driven time series dynamics. Density-dependent integrated autoregressive (ARI) models were found for atherinid rates of change at all other sampling stations. First-order ARI models found had phi(1) parameters between -1 and 0, which indicated density-dependent quasi-cyclic dynamics through time. Variances explained by ARI models were higher at the western than at the eastern region of Lake Chapala. Rate of dampening of forecasted quasi-cycles for atherinids and pintilla goodeids was higher at the eastern than western region of Lake Chapala. Pollution effect on quasi-cyclic fish population patterns are analogous to overfishing in regards that pollution-induced mortality removes part of the fish stock, and consequently the effect of density-dependent compensatory mechanisms tend to diminish as pollution levels increase. Cyclic second-order ARI models were found near San Luis Soyatlan for atherinids and pintilla goodeids. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000183969400008 L2 - Lake Chapala;atherinidae;Chirostoma spp.;goodeidae;Chapalichthys encaustus;ARIMA time series models;fish community;structure;ABUNDANCE; DYNAMICS; INDEXES SO - Ecological Modelling 2003 ;165(2-3):237-250 7419 UI - 6760 AU - Becerra F AU - Soltero JFA AU - Puig JE AU - Schulz PC AU - Esquena J AU - Solans C AD - Univ Guadalajara, CUCEI, Dept Ingn Quim, Guadalajara 4430, Jalisco, MexicoUniv Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, ArgentinaCSIC, Inst Invest Quim & Ambientals Barcelona, Dept Tecnol Tensoactius, Barcelona 08033, SpainSoltero, JFA, Univ Guadalajara, CUCEI, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 4430, Jalisco, Mexico TI - Free-radical polymerization of styrene in worm-like micelles AB - The solubilization of styrene in wormlike micelles of the cationic surfactant, cetyltrimethylammonium tosilate (CTAT), and its polymerization is examined here by UV spectroscopy, oscillatory rheometry, small angle X-ray scattering, polarizing light microscopy, and transmission electron microscopy. At low CTAT concentrations, the polymerization of styrene yields small and rigid rods in coexistence with wormlike micelles that form from the excess surfactant after the polymerization process. At high CTAT concentrations, polymeric rods (of large aspect ratio), spheroid polymer particles, and wormlike micelles coexist. The polymerization rate is second order, indicating that polymerization reactions end mainly by bimolecular termination MH - Argentina MH - Mexico|Jalisco MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000187126200001 L2 - LIQUID-CRYSTALLINE PHASES; TOSILATE-WATER SYSTEM; DODECYLTRIMETHYLAMMONIUM HYDROXIDE; BENZENE-DERIVATIVES; MICROEMULSIONS; RHEOLOGY; BROMIDE; METHACRYLATE; NAPHTHALENE; POLARITY SO - Colloid and Polymer Science 2003 ;282(2):103-109 7420 UI - 8186 AU - Becerril-Espinoza FG AU - Torchynska TV AU - Rodriguez MM AU - Khomenkova L AU - Scherbina LV AD - Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, UA-252028 Kiev, UkraineTorchynska, TV, Inst Politecn Nacl, ESFM, Ed 9 UPALM, Mexico City 07738, DF, Mexico TI - Formation of Si/SiOx interface and its influence on photoluminescence of Si nano-crystallites AB - Photoluminescence (PL), PL excitation and atomic force microscopy investigations of porous silicon (PSi) have been done in as-prepared state and after 1.0 year storage in ambient air. In as-prepared state, Psi layers are characterised by two PL bands peaked at 1.70 and 2.00 eV. The complex analysing of the changes of PL parameters during the formation of the Si/SiOx interface give possibility to make conclusion concerning the PL and PL excitation mechanisms for both PL bands in Si-nano-crystallites. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000183607400104 L2 - photoluminescence;nano-structures;porous silicon;VISIBLE PHOTOLUMINESCENCE; SILICON; NANOCRYSTALS; SURFACE; DEFECT SO - Microelectronics Journal 2003 ;34(5-8):759-761 7421 UI - 7596 AU - Behle RW AU - Tamez-Guerra P AU - McGuire MR AD - USDA ARS, Natl Ctr Agr Utilizat Res, Crop Bioprotect Res Unit, Peoria, IL 61604, USAUANL, Fac Ciencias Biol, Dep Microbiol & Inmunol, San Nicolas De Los Garza 66451, NL, MexicoWestern Integrated Cropping Syst Res Unit, Shafter, CA 93263, USABehle, RW, USDA ARS, Natl Ctr Agr Utilizat Res, Crop Bioprotect Res Unit, 1815 N Univ St, Peoria, IL 61604 USA TI - Field activity and storage stability of Anagrapha falcifera nucleopolyhedrovirus (AfMNPV) in spray-dried lignin-based formulations AB - A multiple-embedded nucleopolyhedrovirus isolated from Anagrapha falcifera (Kirby) (AfMNPV) has potential to be developed into a microbial bioinsecticide because the host range includes several economic pests. We tested spray-dried AfMNPV formulations after storage for insecticidal activity based on bioassays with neonate Trichoplusia ni (Hubner). Eight experimental lignin-based spray-dried formulations, a glycerin-based formulation, and an unformulated sample were made with virus stock from three commercial production lots. Samples of these formulations were stored at 30degreesC in individually sealed sample containers for destructive sampling after 1, 3, and 6 mo whereas the remaining product was stored in glass jars under refrigeration for up to 30mo. Spray drying did not significantly reduce the initial LC(50)s of AfMNPV in experimental formulations compared with unformulated virus that was not spray dried. Refrigerated storage for 6 mo did not significantly lower virus activity of formulated samples compared with the unformulated AfMNPV stored frozen, while samples stored for 30 mo had higher LC50 values determined by both droplet and leaf feeding assays. When stored at 30degreesC, most formulations (22 of 24) maintained insecticidal activity for 3 mo, but most (21 of 24) lost significant activity after 6 mo of storage. The glycerin-based formulation also lost activity within 6 mo of storage at 30degreesC when compared with frozen unformulated virus, but did not lose activity when stored refrigerated for up to 30 mo. These formulations were evaluated after 7 mo at 4degreesC for residual insecticidal activity when applied to field grown cabbage. Insecticidal activity was determined against T. ni neonates for treated leaf samples collected at 3, 7, 27, and 51 h after application of 2.5 x 10(12) obs/ha. Field tests showed no differences in activity among samples of stored formulations and one freshly made formulation. Spray-dried formulations had significantly higher insecticidal activity (67.5% mortality) compared with the unformulated treatment (30% mortality) sampled 3 h after application. At 3, 7, and 27 h after application, the spray-dried formulations had higher residual activity (67%, 59%, and 42% mortality, respectively), compared with the commercial glycerin-based formulation (61%, 38%, and 23% mortality, respectively). These experiments demonstrated that AfMNPV in lignin-based spray-dried formulations had a shelf-life of up to 3 mo at 30degreesC and up to 30 mo at 4degreesC, and with longer residual insecticidal activity in the field compared with unformulated or a glycerin formulation MH - USA MH - Mexico|Nuevo Leon PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000185018100006 L2 - Anagrapha falcifera nuclear polyhedrovirus;shelf-life;spray dry;lignin;microencapsulation;NUCLEAR POLYHEDROSIS-VIRUS; BACILLUS-THURINGIENSIS; MICROBIAL CONTROL; INCLUSION-BODIES; GYPSY-MOTH; LEPIDOPTERA; NOCTUIDAE; PERSISTENCE; PYRALIDAE; AGENTS SO - Journal of Economic Entomology 2003 ;96(4):1066-1075 7422 UI - 6118 AU - Belfield KD AU - Morales AR AU - Chapela VM AU - Percino J AD - Univ Cent Florida, CREOL, Sch Opt, Orlando, FL 32816, USAUniv Cent Florida, Dept Chem, Orlando, FL 32816, USABenemerita Univ De Puebla, Ctr Quim, Puebla, Mexico TI - Synthesis, characterization and optical properties of new two-photon absorbing symmetrical fluorene derivatives MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187918001731 SO - Abstracts of Papers of the American Chemical Society 2003 ;225():U334-U334 7423 UI - 6119 AU - Belfield KD AU - Morales AR AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, CREOL, Sch Opt, Orlando, FL 32816, USABenemerita Univ Puebla, Ctr Quim, Puebla, Mexico TI - Two-photon absorption in a new symmetrical series of diphenylaminofluorene-based structures MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187918002769 SO - Abstracts of Papers of the American Chemical Society 2003 ;225():U542-U542 7424 UI - 9140 AU - Bellini M AD - Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Morelia 58041, Michoacan, MexicoBellini, M, Univ Nacl Mar Plata, FCEyN, Dept Fis, Mar Del Plata, Buenos Aires, Argentina TI - Fresh inflation with increasing cosmological parameter AB - I study a fresh inflationary model with an increasing F-cosmological parameter. The model provides sufficient e-folds to solve the flatness or horizon problem and the density fluctuations agree with experimental values. The temperature increases during fresh inflation and reaches its maximum value when inflation ends. This fact could provide a transition between inflation and the radiation-dominated epoch, once inflation ends. I find that entropy perturbations always remain below 10(-4) during fresh inflation and become negligible when fresh inflation ends. Hence, the adiabatic fluctuations dominate the primordial spectrum at the end of fresh inflation MH - Argentina MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000181015700098 L2 - WARM INFLATION; CLASSICALITY CONDITIONS; DENSITY PERTURBATIONS; STOCHASTIC APPROACH; SCENARIO; FLUCTUATIONS; UNIVERSE; GAUGE; FIELD; TEMPERATURE SO - Physical Review D 2003 ;67(2): 7425 UI - 7236 AU - Bello-Ramirez AM AU - Buendia-Orozco J AU - Nava-Ocampo AA AD - Hosp Infantil Mexico Fed Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoUniv Toronto, Leslie San Fac Pharm, MDIT Ctr, Toronto, ON, CanadaUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca, Morelos, MexicoNava-Ocampo, AA, Hosp Infantil Mexico Fed Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, Mexico TI - A QSAR analysis to explain the analgesic properties of Aconitum alkaloids AB - Aconitum roots are traditionally prescribed for the management of different types of painful affections in Asiatic countries. A quantitative structure-activity relationship (QSAR) analysis was performed to study the effect of chemical substitutes in the analgesic potency of alkaloids available in Chinese Aconitum roots. Using the CAChe program package for biomolecules, molecular modelling was performed in 12 alkaloids previously tested in a model of acetic acid-induced writhing in rats. The ED50 (mumol/kg) was used as the activity parameter. Structural parameters were compared between alkaloids with an aroyl/aroyloxy group at R-14 and alkaloids with the aroyloxy group at R-4. Single linear regression analyses were performed in order to find the parameters explaining activity. Alkaloids with an aroyl/aroyloxy group at R-14 exhibited the highest potency (significantly less ED50). The stability parameters were different between groups, e.g. total energy was -8.0 +/- 0.4 in the potent analgesic alkaloids and -6.7 +/- 0.3 in the weak analgesic alkaloids (P = 0.001). The reactivity index of C2', C3' and C5' of the aromatic ring was also different between groups, e.g. the reactivity index of C5' was 40.8 +/- 0.6 in potent analgesic alkaloids and 48.1 +/- 0.6 in weaker analgesic alkaloids (P < 0.001). Several structural parameters explained analgesic activity of alkaloids, being the reactivity index of C5' on the aromatic group the most important factor (r = 0.89; P < 0.001) MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0767-3981 UR - ISI:000185959200006 L2 - analgesic alkaloids;bio-organic chemistry;natural products;pain control;CENTRAL-NERVOUS-SYSTEM SO - Fundamental & Clinical Pharmacology 2003 ;17(5):575-580 7426 UI - 8304 AU - Bellon MR AU - Berthaud J AU - Smale M AU - Aguirre JA AU - Taba S AU - Aragon F AU - Diaz J AU - Castro H AD - CIMMYT, Mexico City 06600, DF, MexicoINIFAP, Guanajuato 38050, MexicoINIFAP, Oaxaca 68000, MexicoInt Plant Genet Resources Inst, Rome, ItalyBellon, MR, CIMMYT, Apartado Postal 6-641, Mexico City 06600, DF, Mexico TI - Participatory landrace selection for on-farm conservation: An example from the Central Valleys of Oaxaca, Mexico AB - On-farm conservation is recognized as a key component of a comprehensive strategy to conserve crop genetic resources. A fundamental problem faced by any on-farm conservation project is the identification of crop populations on which efforts should be focused. This paper describes a method to identify a subset of landraces for further conservation efforts from a larger collection representing the diversity found in the Central Valleys of Oaxaca, Mexico. Mexico is a center of origin and diversity for maize (Zea mays L.). The 17 landraces selected from an initial collection of 152 satisfy two criteria. First, they represent the diversity present in the larger collection. Second, they appear to serve the interests of farmers in the region. Data for applying the method were elicited through participatory as well as conventional techniques. They incorporate the complementary perspectives of both men and women members of farm households, and of plant breeders and social scientists MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Mexico|Oaxaca PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 17 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000183201600008 L2 - farmer participation;landraces;maize (Zea mays L.);Mexico;Oaxaca;on-farm conservation;MAIZE; POPULATIONS; ACCESSIONS SO - Genetic Resources and Crop Evolution 2003 ;50(4):401-416 7427 UI - 8385 AU - Beltramone A AU - Cruz FAG AU - Santos AG AD - Univ Nacl Rosario, RA-2000 Rosario, ArgentinaUniv Autonoma Baja California, Mexicali 21100, Baja California, MexicoUPM, Madrid, Spain TI - Modifications in concrete superficial properties due to the use of different formworkrelease agents and plastic additives AB - The actual research study, carried out in the Laboratory of Construction Materials of the ETSAM., analyses the modifications in superficial properties (regarding colour and texture) of grey Portland cement mortars due to the use of different formworks release agents (car oil, mineral oil and paraffin) and to the addition of plastic superplasticiser to the mixture (Bettor and Sika trademarks). Once the test samples were obtained, a digital registration was made by giving them values in terms of colour and texture observed changes using computer programmes, referring those values to the test specimen (only cement, no additives). A migration of the polymeric particles of the additives towards the surface was observed, presenting the following modifications: Colour: darker hues than those of the test specimen sample were registered in the specimens with additives. Texture: the texture of the test specimen containing additives such as modified polycarboxilic ethers, polycarboxilic ethers; modified organic polymers and modified synthetic Indamine were much smoother than the one in test specimen. Test specimens containing melamine, condensed naftalensulphate and polycarboxilic derivatives were a bit rougher but still smoother than the test specimen. The same variation of results as for the colour properties was obtained for the texture as regards to the use of formworks release agents, varying from smoothest to roughest with the car oil MH - Argentina MH - Mexico|Baja California MH - Spain PB - MADRID: INSTITUTO CIENCIAS CONSTRUCCION EDUARDO TORROJA RP - NOT IN FILE U3 - TC 1 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0465-2746 UR - ISI:000182980100006 L2 - cement derivates;mortar superplasticiser additives;formworks release agents;mortars surface properties;texture and colour SO - Materiales de Construccion 2003 ;53(270):71-78 7428 UI - 8819 AU - Benavides R AU - Ponce-Ibarra VH AU - Reyes-Vielma B AU - Billingham NC AD - CIQA, Saltillo 25100, Coahuila, MexicoUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN 9QJ, E Sussex, EnglandBenavides, R, CIQA, Blvd Enrique Reyna H 140, Saltillo 25100, Coahuila, Mexico TI - Environmental degradation of highly loaded polypropylene AB - Six formulations of polypropylene (PP) containing combinations of calcium carbonate (CaCO3), stearic acid, and a light stabilizer were prepared and placed in the environment for their degradation. Samples were taken at proper time intervals for following the consequences of the outdoor conditions. Impact resistance and elongation at rupture were evaluated as mechanical properties. On the other hand, size exclusion chromatography, chemiluminescence, and infrared spectroscopy (FTIR) were used to follow chemical changes. Polypropylene by itself showed a slow but stable aging, while PP + CaCO3 had improved initial mechanical properties but was more sensitive to degradation. The treatment of CaCO3 with stearic acid before its addition to PP resulted in an improved material but with an induction time to degradation greatly reduced to 2 weeks of environmental exposure. The addition of the UV stabilizer reduced the negative effect of the stearic acid to some extent but did not compensate for it completely MH - United Kingdom MH - Mexico|Coahuila PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Materials Science, Textiles;Polymer Science U5 - J;Article AV - English IS - 0193-7197 UR - ISI:000181971500006 L2 - ACID SO - Journal of Vinyl & Additive Technology 2003 ;9(1):32-40 7429 UI - 8820 AU - Benavides R AU - Gonzalez-Hernandez R AU - Gonzalez-Cantu MC AU - Reyes-Vielma B AU - Billingham NC AD - CIQA, Saltillo 25100, Coahuila, MexicoUniv Sussex, Sch Chem Phys & Environm Sci, Brighton BN 9QJ, E Sussex, EnglandBenavides, R, CIQA, Blvd Enrique Reyna H 140, Saltillo 25100, Coahuila, Mexico TI - Accelerated degradation of highly loaded polypropylene AB - The accelerated aging of six formulations of polypropylene highly loaded with calcium carbonate and containing a surfactant additive (stearic acid) as well as an ultraviolet (UV) stabilizer was studied. Degradation was followed by measuring mechanical properties (elongation percentage and impact resistance), the dynamic mechanical behavior and some chemical changes such as molecular weight and carbonyl group formation along with oxidation temperatures, found by chemiluminescence. The addition of 30 phr of filler to the polymer reduced the stability of the mixture, and the stearic acid used to treat the filler enhanced this effect considerably. On the other hand, the addition of the photostabilizer controlled to some extent such negative effects, though not completely. The most stable formulation was the polypropylene containing only the UV stabilizer MH - United Kingdom MH - Mexico|Coahuila PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Materials Science, Textiles;Polymer Science U5 - J;Article AV - English IS - 0193-7197 UR - ISI:000181971500007 L2 - MECHANICAL-PROPERTIES; ACID SO - Journal of Vinyl & Additive Technology 2003 ;9(1):41-49 7430 UI - 6885 AU - Benet L AU - Leyvraz F AU - Seligman TH AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoCtr Int Ciencias AC, Cuernavaca 62131, Morelos, MexicoUniv Paris 11, Ctr Sci Orsay, LPTMS, F-91405 Orsay, FranceBenet, L, UNAM, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Wigner-Dyson statistics for a class of integrable models AB - We construct an ensemble of second-quantized Hamiltonians with two bosonic degrees of freedom, whose members display with probability one Gaussian orthogonal ensemble (GOE) or Gaussian unitary ensemble (GUE) statistics. Nevertheless, these Hamiltonians have a second integral of motion, namely, the boson number, and thus are integrable. To construct this ensemble we use some "reverse engineering" starting from the fact that n bosons in a two-level system with random interactions have an integrable classical limit by the old Heisenberg association of boson operators to actions and angles. By choosing an n-body random interaction and degenerate levels we end up with GOE or GUE Hamiltonians. Ergodicity of these ensembles completes the example MH - France MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000186571200005 L2 - INTERACTING BOSON SYSTEMS; RANDOM-MATRIX ENSEMBLES; SPECTRUM; BEHAVIOR; CHAOS SO - Physical Review e 2003 ;68(4): 7431 UI - 8569 AU - Benet L AU - Jung C AU - Leyvraz F AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fist, Cuernavaca 62210, Morelos, MexicoBenet, L, Univ Paris 11, LPTMS, Bat 100, F-91405 Orsay, France TI - Integrability of interacting two-level boson systems AB - We prove that a wide class of two-level boson systems interacting through k-body forces is integrable in the semiclassical limit irrespective of the value of the parameters of the model. This class of models includes number-conserving Hamiltonians, and interactions which do not conserve the particle number. Applications to two-component and atom-molecule Bose-Einstein condensates at zero temperature as well as to the bosonic k-body embedded ensembles of Gaussian random matrices in the dense limit are discussed MH - France MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000182566300001 L2 - EINSTEIN CONDENSATE; COHERENT OSCILLATIONS; ENSEMBLES; DYNAMICS; ASSIGNMENT; SPECTRUM SO - Journal of Physics A-Mathematical and General 2003 ;36(15):L217-L222 7432 UI - 8608 AU - Benet L AU - Weidenmuller HA AD - UNAM, Unidad Morelos, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoMax Planck Inst Kernphys, D-69029 Heidelberg, GermanyBenet, L, UNAM, Unidad Morelos, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, Mexico TI - Review of the k-body embedded ensembles of Gaussian random matrices AB - The embedded ensembles were introduced by Mon and French (1975 Ann. Phys., AT 95 90) as physically more plausible stochastic models of many-body systems governed by one- and two-body interactions than provided by standard random-matrix theory. We review several approaches aimed at determining the spectral density, the spectral fluctuation properties and the ergodic properties of these ensembles: moments methods, numerical simulations, the replica trick, the eigenvector decomposition of the matrix of second moments and supersymmetry, the binary correlation approximation, and the study of correlations between matrix elements MH - Germany MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Review AV - English IS - 0305-4470 UR - ISI:000182454900041 L2 - LEVEL-DENSITY-FLUCTUATIONS; SPECTRAL PROPERTIES; PARTICLE-SYSTEMS; ENERGY-LEVELS; 2-BODY; BOSONS; DISTRIBUTIONS SO - Journal of Physics A-Mathematical and General 2003 ;36(12):3569-3593 7433 UI - 8089 AU - Benyoucef M AU - Legros M AU - Coujou A AU - Caron P AU - Calderon H AU - Clement N AD - Fac Sci & Tech, Marrakech, Morocco. CNRS, CEMES, F-31055 Toulouse, France. Off Natl Etud & Rech Aerosp, F-92322 Chatillon, France. ESFM, IPN, Dept Ciencia Mats, Mexico City, DF, Mexico TI - Micro-mechanisms involved in rafts of crept MC2 nickel-based single crystal superalloy AB - The micro-mechanisms involved in the gamma/gamma' rafted microstructure built up at 1050degreesC in <001> oriented MC2 superalloy single crystals are analysed by means of SEM, post mortem and in situ TEM observations. The creation and propagation modes of moving dislocations evidence the important role of the misfit dislocation network as well as the strength of the gamma/gamma' interfaces MH - France MH - Mexico|Distrito Federal T3 - THERMEC'2003Materials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle1BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBW92N AV - English IS - 0255-5476 UR - ISI:000183626400119 L2 - superalloy;single crystal;high temperature creep;transmission electron microscopy;in situ deformation;plasticity SO - 2003 ;():779-784 7434 UI - 7533 AU - Benzi R AU - Procaccia I AD - Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, ItalyUniv Roma Tor Vergata, INFM, I-00133 Rome, ItalyWeizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, IsraelUNAM, Ctr Intranacl Ciencias, Cuernavaca, Morelos, MexicoBenzi, R, Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy TI - Simple model for drag reduction AB - Direct numerical simulations established that the finite-extension nonlinear-elasticity-Peterlin (FENE-P) model of viscoelastic flows exhibits the phenomenon of turbulent drag reduction which is caused in experiments by dilute polymeric additives. To gain analytic understanding of the phenomenon, we introduce in this paper a simple one-dimensional model of the FENE-P equations. We demonstrate drag reduction in the simple model, and explain analytically the main observations which include (i) reduction of velocity gradients for fixed throughput and (ii) increase of throughput for fixed dissipation MH - Israel MH - Italy MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000185194400008 SO - Physical Review e 2003 ;68(2): 7435 UI - 7994 AU - Bergin E AU - Calvet N AU - D'Alessio P AU - Herczeg GJ AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Colorado, Joint Inst Lab Astrophys, UCB 440, Boulder, CO 80309, USABergin, E, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - The effects of UV continuum and Ly alpha radiation on the chemical equilibrium of T Tauri disks AB - We show in this Letter that the spectral details of the far-ultraviolet (FUV) radiation fields have a large impact on the chemistry of protoplanetary disks surrounding T Tauri stars. We show that the strength of a realistic stellar FUV field is significantly lower than typically assumed in chemical calculations and that the radiation field is dominated by strong line emission, most notably Lyalpha radiation. The effects of the strong Lyalpha emission on the chemical equilibrium in protoplanetary disks have previously been unrecognized. We discuss the impact of this radiation on molecular observations in the context of a radiative transfer model that includes both direct attenuation and scattering. In particular, Lya radiation will directly dissociate water vapor and may contribute to the observed enhancements of CN/HCN in disks MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000184017100022 L2 - accretion, accretion disks;astrobiology;astrochemistry;circumstellar matter;stars : pre-main-sequence;ultraviolet : stars;AURIGA MOLECULAR CLOUD; MAIN-SEQUENCE STARS; PROTOPLANETARY DISKS; ACCRETION DISKS; 2-DIMENSIONAL DISTRIBUTIONS; OSCILLATOR-STRENGTHS; GASEOUS MOLECULES; COLUMN DENSITIES; YOUNG OBJECTS; X-RAY SO - Astrophysical Journal 2003 ;591(2):L159-L162 7436 UI - 6884 AU - Berlanga-Ramirez EO AU - guilera-Granja F AU - az-Ortiz A AU - Rodriguez-Lopez JL AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoInst Potosino Invest Cient & Tecnol, San Luis Potosi 78231, MexicoUniv Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainBerlanga-Ramirez, EO, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Effects of the structural deformations on the magnetism of Rh-6 and Rh-13 clusters AB - The effect of structural deformations on the magnetic and electronic properties of small Rh clusters was studied. The electronic properties were calculated using a self-consistent spd tight-binding Hamiltonian within the unrestricted Hartree-Fock approximation. For hydrostatic deformations, the magnetic moment of the clusters increases with bond-length in a steplike fashion. Axial distortions, on the other hand, affect the magnetism of the clusters in a more complex manner that can be correlated with the local coordination and bond length through the definition of an effective coordination number. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000186575600029 L2 - magnetic nanostructures;transition-metal clusters;electronic properties;tight-binding methods;RHODIUM CLUSTERS; METAL-CLUSTERS; MOMENTS SO - Physics Letters A 2003 ;318(4-5):473-479 7437 UI - 8054 AU - Berlanga-Ramirez EO AU - guilera-Granja F AU - az-Ortiz A AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoInst Potosino Invest Cient & Tecnol, San Luis Potosi 78231, SLP, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainBerlanga-Ramirez, EO, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, Mexico TI - Magnetism in Rh clusters under hydrostatic deformations AB - The magnetic behavior of rhodium clusters RhN (N = 4-38) under hydrostatic deformations was investigated. The starting cluster structures were obtained from an evolutionary search algorithm applied to a Gupta potential. The spin-polarized electronic structure and related magnetic properties were calculated using a self-consistent spd tight-binding Hamiltonian within the unrestricted Hartree-Fock approximation. The magnetic behavior was analyzed in terms of the interdependence between the geometrical parameters and the electronic structure. Anomalous magnetic effects were found in some cases MH - Mexico|San Luis Potosi MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000183890900005 L2 - TRANSITION-METAL CLUSTERS; RHODIUM CLUSTERS; ELECTRONIC-STRUCTURE; COBALT CLUSTERS; IRON CLUSTERS; NICKEL CLUSTERS; MOMENTS; DEPENDENCE; POTENTIALS; BEHAVIOR SO - European Physical Journal D 2003 ;23(3):343-349 7438 UI - 7755 AU - Berman GP AU - Borgonovi F AU - Lopez GV AU - Tsifrinovich VI AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyINFM, Unita Brescia, I-25121 Brescia, ItalyIst Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, ItalyUniv Guadalajara, Dept Fis, SR 500, Guadalajara 44420, Jalisco, MexicoPolytech Univ, IDS Dept, Brooklyn, NY 11201, USABerman, GP, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Transient dynamics in magnetic force microscopy for a single-spin measurement AB - We analyze a single-spin measurement using a transient process in magnetic force microscopy which could increase the maximum operating temperature by a factor of Q (the quality factor of the cantilever) in comparison with the static Stern-Gerlach effect. We obtain an exact solution of the master equation, which confirms this result. We also discuss the conditions required to create a macroscopic quantum superposition in the cantilever MH - Italy MH - Mexico|Jalisco MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000184571600017 L2 - QUANTUM BROWNIAN-MOTION; DECOHERENCE SO - Physical Review A 2003 ;68(1): 7439 UI - 7048 AU - Bermudez-Humaran LG AU - Cortes-Perez NG AU - Le Loir Y AU - Gruss A AU - Rodriguez-Padilla C AU - Saucedo-Cardenas O AU - Langella P AU - de Oca-Luna RM AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceMACAO AC, Ctr Reprod & Conservac, Durango, Dgo, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol & Virol, San Nicolas De Los Garza, NL, MexicoInst Mexicano Seguro Social, Ctr Invest Biomed Noreste, Monterrey, NL, MexicoLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - Fusion to a carrier protein and a synthetic propeptide enhances E7 HPV-16 production and secretion in Lactococcus lactis AB - An inducible system to improve and stabilize the production of an extremely labile protein (E7 antigen of human papillomavirus type 16) was developed in the food-grade bacterium Lactococcus lactis. A protein carrier, the staphylococcal nuclease Nuc, was fused either to N- or C-termini of E7 protein, and the resulting hybrid proteins were rescued from intracellular proteolysis but poorly secreted by L. lactis. A synthetic propeptide (LEISSTCDA) was then fused and significantly improved the secretion efficiency of the hybrid protein Nuc-E7 by L. lactis MH - France MH - Mexico|Durango MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 8756-7938 UR - ISI:000186413200064 L2 - CONTROLLED GENE-EXPRESSION; ACID BACTERIA; SYSTEMS SO - Biotechnology Progress 2003 ;19(3):1101-1104 7440 UI - 8795 AU - Bermudez-Humaran LG AU - Langella P AU - Cortes-Perez NG AU - Gruss A AU - Tamez-Guerra RS AU - Oliveira SC AU - Saucedo-Cardenas O AU - de Oca-Luna RM AU - Le Loir Y AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol, San Nicolas De Los Garza, BrazilCtr Invest Biomed, Inst Mexicano Seguro Social, Monterrey, Nuevo Leon, MexicoUFMG, ICB, Lab Immunol Doencas Infecciosas, Belo Horizonte, MG, BrazilLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - Intranasal immunization with recombinant Lactococcus lactis secreting murine interleukin-12 enhances antigen-specific Th1 cytokine production AB - Interleukin-12 (IL-12), a heterodimeric cytokine, plays an important role in cellular immunity to several bacterial, viral, and parasitic infections and has adjuvant activity when it is codelivered with DNA vaccines. IL-12 has also been used with success in cancer immunotherapy treatments. However, systemic IL-12 therapy has been limited by high levels of toxicity. We describe here inducible expression and secretion of IL-12 in the food-grade lactic acid bacterium Lactococcus lactis. IL-12 was expressed as two separate polypeptides (p35-p40) or as a single recombinant polypeptide (scIL-12). The biological activity of IL-12 produced by the recombinant L. lactis strain was confirmed in vitro by its ability to induce gamma interferon (IFN-gamma) production by mouse splenocytes. Local administration of IL-12-producing strains at the intranasal mucosal surface resulted in IFN-gamma production in mice. The activity was greater with the single polypeptide scIL-12. An antigen-specific cellular response (i.e., secretion of Th1 cytokines, IL-2, and IFN-gamma) elicited by a recombinant L. lactis strain displaying a cell wall-anchored human papillomavirus type 16 E7 antigen was dramatically increased by coadministration with an L. lactis strain secreting IL-12 protein. Our data show that IL-12 is produced and secreted in an active form by L. lactis and that the strategy which we describe can be used to enhance an antigen-specific immune response and to stimulate local mucosal immunity MH - Brazil MH - France MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 40 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000181926200034 L2 - INTERFERON-GAMMA PRODUCTION; CONTROLLED GENE-EXPRESSION; CELL STIMULATORY FACTOR; IL-12 P40 HOMODIMER; LEISHMANIA-MAJOR; MUCOSAL IMMUNITY; ACID BACTERIA; SUBSP LACTIS; IN-VIVO; VACCINE SO - Infection and Immunity 2003 ;71(4):1887-1896 7441 UI - 9086 AU - Bermudez JC AU - Kir'yanov AV AU - Pinto-Robledo VJ AU - Damzen MJ AD - Ctr Invest Opt AC, Leon 37150, Gto, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, EnglandBermudez, JC, Ctr Invest Opt AC, Loma Boscue 115, Leon 37150, Gto, Mexico TI - The influence of thermally induced effects on operation of a compact diode-side-pumped Nd : YVO4 laser AB - The thermally induced effects (thermal lensing and thermal wedging) induced in the grazing-incidence side-pumped Nd:YVO4 laser geometry at high-power laser diode pumping are numerically modeled and analyzed. The 3D temperature distributions and the corresponding thermally induced lens in the Nd:YVO4 slab are calculated for straight and zigzag paths of the laser beam inside the crystal. An analysis of two compact (semimonolithic) cw diode-side-pumped, grazing-incidence geometry Nd:YVO4 laser designs is presented. A laser output power of 5 W (lambda = 1064 nm) was produced at 17 W of diode pumping (conversion efficiency of 30%) in single TEM00 mode operation at high quality (M-x(2) approximate to 1.05 and M-y(2) approximate to 1.01) of the laser beam. The resonators' geometry was analyzed by applying a generalized 4 x 4 matrix modeling of the spatial mode distribution, including the impact on laser operation of the cavity astigmatism and a thermal lens induced in the laser slab MH - United Kingdom MH - Mexico|Guanajuato PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000181112900022 L2 - SOLID-STATE LASER; ND-YAG LASER; HIGH-POWER; EFFICIENT NEODYMIUM; ENERGY-STORAGE; OUTPUT POWER; SLAB; CAVITY; ARRAY; RODS SO - Laser Physics 2003 ;13(2):255-263 7442 UI - 9369 AU - Bernal-Alvarado J AU - Mansanares AM AU - da Silva EC AU - Moreira SGC AD - Univ Guanajuato, Inst Fis, Leon 37000, Gto, MexicoUniv Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilFed Univ Para, Dept Fis, BR-66075900 Belem, Para, BrazilBernal-Alvarado, J, Univ Guanajuato, Inst Fis, AP E-143, Leon 37000, Gto, Mexico TI - Thermal diffusivity measurements in vegetable oils with thermal lens technique AB - Using a thermal lensing experimental setup the thermal properties of several vegetable oils were obtained. The samples were oils from Amazonian species and olive (the popular identifications are piqui, copaiba, buriti, and babacu). The two lasers mismatched mode experimental configuration was used, with a He-Ne laser as the probe and an Ar+ laser as the excitation one. The time resolved spectra were measured using an automatic system, and fitting the aberrant theoretical model to the data, the characteristic relaxation time were obtained, and knowing this value, the thermal property of each oil was solved. (C) 2003 American Institute of Physics MH - Brazil MH - Mexico|Guanajuato PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000180451900119 SO - Review of Scientific Instruments 2003 ;74(1):697-699 7443 UI - 6915 AU - Bernal-Garcia JM AU - Ramos-Estrada M AU - Iglesias-Silva GA AU - Hall KR AD - Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, MexicoInst Mexicano Petr, Mexico City 07330, DF, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, Mexico TI - Densities and excess molar volumes of aqueous solutions of n-methyldiethanolamine (MDEA) at temperatures from (283.15 to 363.15) K AB - In this paper, we present atmospheric pressure liquid densities for binary mixtures of n-methyldiethanolamine + water over the entire composition range at temperatures between 263.15 and 363.15 K. We measure the liquid densities using a vibrating tube densimeter and use them to produce a correlation for excess molar volumes based upon a Redlich-Kister equation. The excess volumes exhibit negative deviations from ideality at all the investigated temperatures and become less negative with increasing temperature MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000186579200016 L2 - CARBON-DIOXIDE; WATER; VISCOSITY; 2-AMINO-2-METHYL-1-PROPANOL; BLENDS SO - Journal of Chemical and Engineering Data 2003 ;48(6):1442-1445 7444 UI - 7781 AU - Bernardi G AU - Findley L AU - Rocha-Olivares A AD - Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95060, USACIAS, AC, Unidad Guaymas Estudios Galidad Conservac & Desar, Guaymas 85450, Sonora, MexicoCICESE, Dept Ecol, Fisheries Ecol Grp, San Diego, CA 92143, USABernardi, G, Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95060 USA TI - Vicariance and dispersal across Baja California in disjunct marine fish populations AB - Population disjunctions, as a first step toward complete allopatry, present an interesting situation to study incipient speciation. The geological formation of the Baja California Peninsula currently divides 19 species of fish into disjunct populations that are found on its Pacific Coast and in the northern part of the Gulf of California (also called the Sea of Cortez), but are absent from the Cape (Cabo San Lucas) region. We studied the genetic makeup of disjunct populations for 12 of these 19 fish species. Phylogeographic patterns for the 12 species can be separated into two major classes: a first group (eight species) showed reciprocal monophyly and high genetic divergence between disjunct populations. A second group (four species) displayed what appeared to be panmictic populations. Population structure between Pacific Coast populations, across the Punta Eugenia biogeographic boundary, was also evaluated. While dispersal potential (inferred by pelagic larval duration) was a poor predictor of population structure between Gulf of California and Pacific populations, we found that population genetic subdivision along the Pacific Coast at Punta Eugenia was always positively correlated with differentiation between Pacific and Gulf of California populations. Vicariant events, ongoing gene flow, and ecological characteristics played essential roles in shaping the population structures observed in this study MH - USA MH - Mexico|Sonora PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 24 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000184589300014 L2 - Baja California;comparative phylogeography;control region;disjunct populations;Gulf of California;marine fishes;GULF-OF-CALIFORNIA; EREMICUS SPECIES GROUP; CORAL-REEF FISH; GENE FLOW; SYMPATRIC SPECIATION; PENINSULAR DESERT; MITOCHONDRIAL-DNA; COAST POPULATIONS; MTDNA SEQUENCES; OCEAN CURRENTS SO - Evolution 2003 ;57(7):1599-1609 7445 UI - 8733 AU - Berry JD AU - Licea A AU - Popkov M AU - Cortez X AU - Fuller R AU - Elia M AU - Kerwin L AU - Kubitz D AU - Barbas CF AD - Scripps Res Inst, Skaggs Inst Chem Biol, La Jolla, CA 92126, USAScripps Res Inst, Dept Mol Biol, La Jolla, CA 92126, USACtr Invest Cient & Educ Super Ensenada, Dept Acuacultura, Biotecnol Marina, Tijuana, MexicoBarbas, CF, Scripps Res Inst, Skaggs Inst, 10550 N Torrey Pines Rd,BCC-526, La Jolla, CA 92037 USA TI - Rapid monoclonal antibody generation via dendritic cell targeting in vivo AB - Dendritic cells (DC) are the professional antigen-presenting cells of the immune system. Previous studies have demonstrated that targeting foreign antigens to DC leads to enhanced antigen (Ag)-specific responses in vivo. However, the utility of this strategy for the generation of MAbs has not been investigated. To address this question we immunized mice with IgG-peptide conjugates prepared with the hamster anti-murine CD11c MAb N418. Synthetic peptides corresponding to two different exposed regions of DC-specific ICAM-3 grabbing nonintegrin (DC-SIGN), a human C-type lectin, were conjugated to N418 using thiol-based chemistry. The N418 MAb served as the targeting molecule and synthetic peptides as the Ag (MAb-Ag). A rapid and peptide specific serum IgG response was produced by Day 7 when the synthetic peptides were linked to the N418 MAb, compared to peptide co-delivered with the N418 without linkage. Spleen cells from N418-peptide immunized mice were fused on Day 10, and three IgG1/k monoclonal antibodies (MAbs) were selected to one of the peptide epitopes (MID-peptide). One of the MAbs, Novik 2, bound to two forms of recombinant DC-SIGN protein in enzyme-linked immunosorbent assay (ELISA), and was specifically inhibited by the MID-peptide in solution. Two of these MAbs show specific binding to DC-SIGN expressed by cultured human primary DC. We conclude that in vivo DC targeting enhances the immunogenicity of synthetic peptides and is an effective method for the rapid generation of MAbs to predetermined epitopes MH - USA MH - Mexico|Baja California PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Biochemical Research Methods;Biotechnology & Applied Microbiology;Immunology U5 - J;Article AV - English IS - 0272-457X UR - ISI:000182184000004 L2 - DC-SIGN; TRANSGENIC MICE; HUMORAL RESPONSES; PEPTIDE VACCINES; IGG RESPONSES; IN-VIVO; ANTIGEN; EPITOPE; VIRUS; INFECTION SO - Hybridoma and Hybridomics 2003 ;22(1):23-31 7446 UI - 6743 AU - Bert A AU - Llunell M AU - Dovesi R AU - Zicovich-Wilson CM AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyUnita INFM Torino, I-10125 Turin, ItalyZicovich-Wilson, CM, Univ Autonoma Estado Morelos, Fac Ciencias, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Electronic structure characterization of six semiconductors through their localized Wannier functions AB - The crystalline orbitals of six semiconductors (Si, C, BP, AlP, SiC and BN) are localized according to a Wannier-Boys mixed scheme recently implemented. The degree of localization, size and shape of the localized crystalline orbitals are documented by means of various indices (centroid position, second order central moment tensor, its eigenvalues and principal axes, Mulliken population analysis and atomic localization indices) and through their graphical representations. Systematic trends along the series are observed, and are correlated to the Pauling electronegativity scale and the calculated band gap MH - Italy MH - Mexico|Morelos PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000187086000027 L2 - MOLECULAR-ORBITAL METHODS; COMPOSITE ENERGY-BANDS; VALENCE BASIS-SETS; SPONTANEOUS POLARIZATION; LINEAR COMBINATION; DENSITY; APPROXIMATION; CONSTANTS; CRYSTALS; ELEMENTS SO - Physical Chemistry Chemical Physics 2003 ;5(23):5319-5325 7447 UI - 8465 AU - Betancourt I AU - Valenzuela R AU - Vazquez M AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCSIC, Inst Ciencia Mat, Canto Blanco 28049, SpainBetancourt, I, Univ Nacl Autonoma Mexico, Inst Invest Mat, POB 70-360, Mexico City 04510, DF, Mexico TI - Domain model for the magnetoimpedance of metallic ferromagnetic wires AB - Complex inductance formalism (L) is used to calculate the complex circular permeability (mu(circ)) in a domain model for the magnetoimpedance (MI) of soft ferromagnetic wires. An excellent agreement between calculated and experimental values of mu(circ) as a function of frequency is observed. In addition, a very good agreement is also exhibited between experimental and calculated plots of mu(circ) as a function of an applied dc magnetic field before and above the relaxation frequency (also known as single- and double-peak MI effect). These results confirm the validity of L as an alternative approach to MI phenomena in soft ferromagnetic wires. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000182822600157 L2 - SOFT-MAGNETIC WIRES; AMORPHOUS WIRES; IMPEDANCE; PERMEABILITY SO - Journal of Applied Physics 2003 ;93(10):8110-8112 7448 UI - 8722 AU - Betancourt I AU - Davies HA AD - Natl Autonomous Univ Mexico, Inst Mat Res, Mexico City 04510, DF, MexicoUniv Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandBetancourt, I, Natl Autonomous Univ Mexico, Inst Mat Res, POB 70-360, Mexico City 04510, DF, Mexico TI - Influence of Zr and Nb dopant additions on the microstructure and magnetic properties of nanocomposite RE2(Fe,Co)(14)B/alpha(Fe,Co) (RE = Nd-Pr) alloys AB - Nanocomposite REFeB alloy ribbons based on Nd/Pr rare earth (RE) mixtures were produced by devitrification of amorphous melt spun alloys. The effect of Zr and Nb dopant additions on the microstructures and magnetic properties of two-phase RE2Fe14B/alpha-Fe alloy ribbons are reported, the aim being to refine the alpha-Fe grain size with the refractory metal addition through retardation of the crystal growth rate. For the Zr-containing alloys (REyFe94-y-zZrzB6, y = 8, 10, z = 0 - 4) only modest improvements of the magnetic properties, in comparison with the Zr-free alloys, were achieved for 8 at% RE ribbon while, for 10% RE 2% Zr ribbon, fairly good combinations of intrinsic coercivity iH(c) (similar to 400 kA/m) and maximum energy product (BH)(max) (similar to 130 kJ/m(3)) were achieved. Improved grain refinement was achieved with the Nb addition, though the magnetic properties were broadly comparable with those for Zr doped alloys. Both Zr and Nb doping, however, resulted in a steep decrease in Curie temperature, reflecting an attenuation of the exchange interactions in the 2/14/1 unit cell. Additional substitution of 10% of the Fe by Co for the Nb doped alloy resulted in enhanced T,, more than compensating for the reduction due to the Nb, and resulting also in an excellent combination of iH(c) (similar to 500kA/m) and (BH)(max) (140kJ/m(3)). (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000182243600005 L2 - nanocomposite;remanence enhancement;dopant additions;MELT-SPUN RIBBONS; AMORPHOUS PHASE; B ALLOYS; PERMANENT-MAGNETS; REMANENCE; BEHAVIOR SO - Journal of Magnetism and Magnetic Materials 2003 ;261(3):328-336 7449 UI - 8051 AU - Betran FJ AU - Beck D AU - Banziger M AU - Edmeades GO AD - Texas A&M Univ, Soil & Crop Sci Dept, Corn Breeding & Genet Program, College Stn, TX 77845, USACIMMYT, Mexico City 06600, DF, MexicoInt Maize & Wheat Improvement Ctr, Harare, ZimbabwePioneer HiBred Int Inc, Waimea, HI 96796, USABetran, FJ, Texas A&M Univ, Soil & Crop Sci Dept, Corn Breeding & Genet Program, College Stn, TX 77845 USA TI - Secondary traits in parental inbreds and hybrids under stress and non-stress environments in tropical maize AB - Secondary traits other than grain yield (GY) have been successfully used to enhance the rate of genetic improvement for maize (Zea mays L.) populations under abiotic stresses. With increasing trend towards the development of hybrids in the tropics there is a need to understand the genetics of these traits in inbred-hybrid breeding systems. The objectives of this study were to estimate the general combining abilities for secondary traits and their relationship with GY in a group of tropical white inbred lines and their hybrids under stress and non-stress environments. Traits were measured in inbred lines and their hybrid combinations across stress and non-stress subtropical and tropical environments in Mexico. Hybrids showed earlier flowering, taller plants, more ears per plant (EPP), higher shelling percentage, slower leaf senescence, and higher leaf chlorophyll content than inbreds under all environments. La Posta Sequia (LP)-derived inbreds in general had desirable GCA for traits such as anthesis-silking interval (ASI), EPP, and leaf senescence but were more susceptible to foliar diseases. Conventionally bred maize lines had better standability, stay green, and resistance to diseases. Higher GY in lines and hybrids was associated with shorter ASI, earlier flowering, increased plant and ear height, increased EPP, increased shelling percentage, delayed senescence, and greater leaf chlorophyll concentrations. Under stress vs. non-stress conditions, we observed a higher variability for ASI and EPP, a higher inbred-hybrid correlation, and significant correlations between these traits and GY. Inbreds from LP appear to have high frequency of favorable dominant alleles for ASI and EPP. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA MH - Zimbabwe PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000183970800006 L2 - secondary traits;Zea mays;general combining ability;inbreds;hybrids;IMPROVES DROUGHT TOLERANCE; ANTHESIS-SILKING INTERVAL; YIELD COMPONENTS; 8 CYCLES; SELECTION; RESPONSES; IDENTIFICATION; POPULATIONS; NITROGEN; GRAIN SO - Field Crops Research 2003 ;83(1):51-65 7450 UI - 8588 AU - Betran FJ AU - Ribaut JM AU - Beck D AU - de Leon DG AD - Texas A&M Univ, Corn Breeding & Genet Program, College Stn, TX 77845, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoBetran, FJ, Texas A&M Univ, Corn Breeding & Genet Program, College Stn, TX 77845 USA TI - Genetic diversity, specific combining ability, and heterosis in tropical maize under stress and nonstress environments AB - Estimation of genetic diversity and distance among tropical maize (Zea mays L.) lines and the correlation between genetic distance (GD) and hybrid performance would determine breeding strategies, classify inbred lines, define heterotic groups, and predict future hybrid performance. The objectives of this study were to estimate (i) heterosis and specific combining ability (SCA) for grain yield under stress and non-stress environments; (ii) genetic diversity for restriction fragment length polymorphisms (RFLPs) within a set of tropical lines; (iii) GD and classify the lines according to their GD; and (iv) correlation between the GD and hybrid performance, heterosis, and SCA. Seventeen lowland, white tropical inbred lines were represented in a diallel study. Inbred lines and hybrids were evaluated in 12 stress and nonstress environments. The expression of heterosis was greater under drought stress and smaller under low N environments than under nonstress environments. A set of DNA markers identifying 81 loci was used to fingerprint the 17 lines. The level of genetic diversity was high, with 4.65 alleles/locus and polymorphism information content (PIC) values ranging from 0.11 to 0.82. Genomic regions with quantitative trait loci (QTL) for drought tolerance previously identified showed lower genetic diversity. Genetic distance based on RFLP marker data classified the inbred lines in accordance with their pedigree. Positive correlation was found between GD and F, performance (F-1), SCA, midparent heterosis (MPH) and high-parent heterosis (HPH). Specific combining ability had the strongest correlation with GD. Environment significantly affected the correlations between F-1, SCA, MPH, and HPH, with lower values of GD revealed in the more stressed conditions MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 17 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000182540300007 L2 - FRAGMENT-LENGTH-POLYMORPHISMS; QUANTITATIVE TRAIT LOCI; INBRED LINES; DROUGHT CONDITIONS; MOLECULAR MARKERS; GRAIN-YIELD; PERFORMANCE; RFLPS; SELECTION; HETEROZYGOSITY SO - Crop Science 2003 ;43(3):797-806 7451 UI - 8589 AU - Betran FJ AU - Beck D AU - Banziger M AU - Edmeades GO AD - Texas A&M Univ, Corn Breeding & Genet Program, College Stn, TX 77845, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoCIMMYT, Int Maize & Wheat Impovement Ctr, Harare, ZimbabwePioneer HiBred Int Inc, Waimea, HI 96796, USABetran, FJ, Texas A&M Univ, Corn Breeding & Genet Program, College Stn, TX 77845 USA TI - Genetic analysis of inbred and hybrid grain yield under stress and nonstress environments in tropical maize AB - Drought and low soil N cause significant yield reductions in maize. (Zea mays L.) grown in the tropics. Understanding the genetic basis of hybrid performance under these stresses is crucial to designing appropriate breeding strategies. This study evaluates under optimal, drought and low N stress conditions (i),the performance, combining abilities and stability of a group of tropical white inbred lines; (ii) the genetic control and modes of gene action for grain yield; and (iii) the relationship between line per se and hybrid performance. Seventeen lowland white-grained tropical maize inbred lines, were used in a diallel study. Lines and their hybrids were evaluated separately in trials under drought stress, low N, and optimal conditions in a total of 12 environments. The differences in grain yield between hybrids and inbreds (i.e., heterosis) increased with the intensity of drought stress. Significant interactions were observed for combining abilities under low and high N. The type of gene action appeared to be different under drought than under low N, with additive effects more important under drought and dominance effects more important under low N. The importance of additive effects increased-with intensity of drought stress. This suggests the need for drought tolerance in both parental lines to achieve acceptable hybrid performance under severe drought. Inbreds derived from the population 'La Posta Sequia' exhibited the highest GCA effects, stability coefficients, and frequency of dominant alleles for grain yield. Good performance across stress levels can be achieved in tropical maize hybrids MH - Mexico|Distrito Federal MH - USA MH - Zimbabwe PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 22 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000182540300008 L2 - NITROGEN TARGET ENVIRONMENTS; ANTHESIS-SILKING INTERVAL; QUANTITATIVE TRAIT LOCI; DROUGHT TOLERANCE; 8 CYCLES; IMPROVING MAIZE; SELECTION; POPULATIONS; EFFICIENCY; RESPONSES SO - Crop Science 2003 ;43(3):807-817 7452 UI - 8518 AU - Bhering DL AU - Ramirez-Solis A AU - Mota CJA AD - Fed Univ Rio De Janeiro, Inst Quim, Dept Quim Organ, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoMota, CJA, Fed Univ Rio De Janeiro, Inst Quim, Dept Quim Organ, Cidade Univ CT Bloco A, BR-21949900 Rio De Janeiro, Brazil TI - A density functional theory based approach to extraframework aluminum species in zeolites AB - The structures of six different extraframework aluminum (EFAL) species, possibly present in zeolites, were studied by density functional theory methods. A T-6 cluster (T = Si, Al), with different Si/Al ratios, was used to simulate the real zeolite Y structure and the coordination of the chosen EFAL species (Al3+, Al(OH)(2+), AlO+, AI(OH)(2)(+), AlO(OH), and Al(OH)(3)) The monovalent cations prefer to attain bicoordination with the framework AlO4- moiety, while di- and trivalent cations usually achieve tetracoordination. One important result is that, in all cases, coordination occurs with the oxygen atoms nearest to the framework aluminum ones. A single water molecule addition to the optimized Al3+.T-6 cluster produces a strongly exothermic reaction, leading to formation of a hydroxyaluminum cation and an acidic site on the zeolite. The addition of a second water molecule produces only minor energetic and structural changes MH - Brazil MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000182733000018 L2 - COMPACT EFFECTIVE POTENTIALS; EXTRA-FRAMEWORK ALUMINUM; EXPONENT BASIS-SETS; Y-TYPE ZEOLITES; H-Y; LEWIS ACIDITY; DEALUMINATION; CRACKING; MODELS; SITES SO - Journal of Physical Chemistry B 2003 ;107(18):4342-4347 7453 UI - 6854 AU - Biggin AJ AU - Bohnel HN AD - UNAM, Ctr Geociencias, Queretaro 76230, QRO, MexicoBiggin, AJ, Univ Montpellier 2, CNRS, UMR UM2 5568, Case Courrier 49, F-34095 Montpellier 05, France TI - A method to reduce the curvature of Arai plots produced during Thellier palaeointensity experiments performed on multidomain grains AB - We highlight benefits resulting from a simple modification to the conventional Thellier-Coe (CTC) method of palaeointensity determination. A consideration of current theory pertaining to partial thermoremanence (pTRM) acquisition in pseudo-single (PSD) and multidomain (MD) grains is used to show that the reversed Thellier-Coe (RTC) method is expected to reduce the curvature of pTRM-NRM plots. Experimental data confirms that this is actually the case although there are some observed effects that are not accounted for by present theory. The RTC method is shown to be an improvement over the CTC method in the sense that it acts to reduce the palaeointensity overestimate produced when an experiment is abandoned below the Curie temperature because of alteration occurring. However, more work is necessary to verify its general applicability MH - France MH - Mexico|Queretaro PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000186798900001 L2 - magnetic domain;palaeointensity;EARTHS MAGNETIC-FIELD; PSEUDO-SINGLE-DOMAIN; THERMOREMANENT MAGNETIZATION; ACQUISITION; INTENSITY; MODEL; STATE; ROCKS; SIZE SO - Geophysical Journal International 2003 ;155(3):F13-F19 7454 UI - 7109 AU - Biggin AJ AU - Thomas DN AD - Kingston Univ, Sch Earth Sci & Geog, Geodynam & Crustal Proc Res Grp, Kingston upon Thames KT1 2EE, Surrey, EnglandBiggin, AJ, UNAM, Ctr Geociencias, Campus Juriquille, Queretaro 76230, Mexico TI - The application of acceptance criteria to results of Thellier palaeointensity experiments performed on samples with pseudo-single-domain-like characteristics AB - The results of a simulated Thellier palaeointensity experiment show that the low temperature portion of Arai plots produced by samples with pseudo-single-domain (PSD)-like hysteresis properties can produce significant inaccuracies despite passing conventional acceptance criteria. Furthermore, full Arai plots which fail these criteria can still produce reasonably accurate results. The evidence presented suggests that during a palaeointensity experiment: pTRM checks can fail despite no alteration occurring, pTRM tail checks are not reliable as indicators of MD-like behaviour, room temperature susceptibility monitoring is unreliable for detecting alteration, and that the minimum requirement for the f (fraction)-value should be increased from 0.15 to at least 0.5. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000186171500008 L2 - Thellier palaeointensity;Arai plots;pTRM;LAVA FLOWS; GRAINS; FIELD; FAILURE; HAWAII; ROCKS; SIZE SO - Physics of the Earth and Planetary Interiors 2003 ;138(3-4):279-287 7455 UI - 9406 AU - Biggin AJ AU - Thomas DN AD - Kingston Univ, Crustal Proc & Geodynam Res Grp, Sch Earth Sci & Geog, Surrey, EnglandBiggin, AJ, UNAM, Ctr Geociencias, Campus Juriquilla, Queretaro 76230, Mexico TI - Analysis of long-term variations in the geomagnetic poloidal field intensity and evaluation of their relationship with global geodynamics AB - The 1167 published cooling unit (CU) palaeointensity estimates contained in the 400-10 Ma portion of the PINT global database were rigorously filtered according to accurate age determinations, palaeodirectional reliability, recognition of polarity and the method of palaeointensity acquisition. The remaining 865 estimates (group 1) were further filtered to ensure self-consistency, reducing the data set to 425 estimates (group 2). Group 1 and 2 data were clustered into temporally and/or spatially distinct rock suites (RS) enabling each part of the record to be assessed for potential biasing by overrepresentation of palaeosecular variation (PSV). The record was segmented according to the distribution of the data, rather than using arbitrary time windows, to ensure quasi-consistent behaviour within each segment. Differences between these segments clearly indicate that a significant long-timescale (10(7) and 10(8) yr) variation of the mean geomagnetic poloidal field intensity (GPFI) occurred during the 400-10 Ma period and hence that changing lowermost mantle conditions affect the capacity of the geodynamo to generate a poloidal field. Both the mean dipole moment and its standard deviation appear to be a function of the range of values each CU may adopt at one particular time. This range is itself controlled by the variation of the maximum limit of dipole moment, while the value of the minimum limit remains relatively constant. Tentative support is provided for the recent suggestion that PSV may have been reduced during the Cretaceous normal superchron (CNS), though more data are needed in the range 120-60 Ma to confirm this. No conclusive evidence was found to support the suggestion that the GPFI record may be biased towards low or high values by palaeointensity determinations obtained using methods that do not adopt pTRM checks. Indeed, offsets caused by unreliable data in well-represented parts of the record are likely to be random and cancel one another out. When GPFI variation is analysed at a sufficiently high resolution to allow comparisons with the geomagnetic polarity reversal frequency (RF), it is not possible to confirm whether the two parameters are anticorrelated, decoupled or related in some more complex way. However, it is clear that GPFI and RF are definitely not positively correlated as has been previously suggested. The present database documents sharp increases in GPFI around the onset times of the two recognized superchrons, itself implying an anticorrelation. The implications, for geodynamo and mantle modelling, of both an anticorrelation and a decoupling of the geomagnetic parameters are discussed briefly. A generic geodynamic model is proposed to explain the relationship between observed long-term changes in GPFI and global geodynamic processes. The model predicts that changes in GPFI result from a chain of geodynamic processes extending from crust to core, beginning with plate reorganizations at the surface and culminating in increases in the vigour of outer core convection. Supercontinents are transient surface expressions of such geodynamic processes and provide the potential to test the generic model. Four time stages are proposed to describe the major long-term changes in GPFI since the Early Devonian: 400-350, 350-250, 250-175 and 175-10 Ma. The GPFI features within these stages are convincingly explained within the context of major events in the evolutionary cycle of Pangaea. Two major avalanching and mantle reorganization events, facilitating whole-mantle convection, are proposed; one linked with the amalgamation of Pangaea, the other (possibly less catastrophic) with the dispersal phase of the supercontinent. These events were separated by a period of mantle insulation during the time when the supercontinent was assembled and a layered mantle convection regime existed. The explanations are consistent with independent evidence from seismology, mantle modelling and mantle dynamics, though some ambiguities and intriguing relationships remain, which can only be addressed by the addition of high-quality palaeointensity data in key time windows targeted by the statistical analysis. The potential of using GPFI variation from the Archaean to the Mid-Palaeozoic to enhance our understanding of Earth's early geodynamic evolution is highlighted. Such data are currently lacking and their acquisition represents a significant challenge for future palaeointensity work MH - United Kingdom MH - Mexico|Queretaro PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 23 U4 - Geochemistry & Geophysics U5 - J;Review AV - English IS - 0956-540X UR - ISI:000180424000011 L2 - global geodynamics;palaeointensity variations;Pangaea evolution;reversal frequency;EARTHS MAGNETIC-FIELD; CORE-MANTLE BOUNDARY; ENDOTHERMIC PHASE-TRANSITION; LARGE IGNEOUS PROVINCES; FLOOD BASALTS; REVERSAL RATE; SECULAR VARIATION; HISTORIC LAVAS; POLAR WANDER; DEEP MANTLE SO - Geophysical Journal International 2003 ;152(2):392-415 7456 UI - 6250 AU - Bijker R AU - Casten RF AU - Zamfir NV AU - McCutchan EA AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, Wright Nucl Struct Lab, New Haven, CT 06520, USAUniv Cologne, Inst Kernphys, D-5000 Cologne, GermanyBijker, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Test of X(5) for the gamma degree of freedom AB - We present the first extensive test of the critical point symmetry X(5) for the gamma degree of freedom, based in part on recent measurements for the gamma band in Sm-152. The agreement is good for some observables including the energies and most intraband and interband transitions, but there is also a serious discrepancy for one transition MH - Germany MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 25 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000188769500016 L2 - SM-152 SO - Physical Review C 2003 ;68(6): 7457 UI - 8071 AU - Binette L AU - Groves B AU - Villar-Martin M AU - Fosbury RAE AU - Axon DJ AD - Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, AustraliaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Hertfordshire, Dept Nat Sci, Hatfield AL10 9AB, Herts, EnglandST ECF, D-85748 Garching, GermanyRochester Inst Technol, Dept Phys, Rochester, NY 14263, USAGroves, B, Mt Stromlo & Siding Spring Observ, Cotter Rd, Weston, ACT 2611, Australia TI - High-z nebulae: Ionization by stars or by an obscured QSO? AB - The gravitational arc observed by Holden et al. at z = 3.356 reveals strong emission lines of N i v] lambda1485, C i v lambdalambda1549, O III] lambda1665 but no N v lambda1240. The lines were modelled assuming photoionization by a thermal distribution hotter than 60 000 K. This paper considers an alternative ionizing source consisting of a partially absorbed powerlaw. We compare the line ratios from a low metallicity nebula (Z(total) = 0.05Z(.)) photoionized by such filtered continuum with those produced by a zero-metallicity star of T-eff = 80 000 K. We find that the latter generally produces stronger emission lines of C, N and O than the absorbed powerlaw, even when their respective He II / Hbeta ratio is matched. The absorbed powerlaw generates N v lambda1240, O v i lambda1035 and [Ne v] lambda3426 nebular lines weaker than the canonical direct powerlaw, although at a much higher level than the 80 000 K stellar atmosphere. As a result of the large partially ionized zone created by the absorbed powerlaw, the optical [O I] lambda6300 and [S II] lambda6731 lines and the C II] lambda2326 and Mg II lambdalambda2800 lines in the UV are much stronger than in the stellar case. These constitute the best discriminant for differentiating the predictions of the absorbed case from those of the stellar model MH - Australia MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000183881000020 L2 - line : formation;quasars : emission lines;galaxies : formation;cosmology : early Universe;LYMAN-ALPHA EMISSION; X-RAY SOURCES; INFRARED OBSERVATIONS; RADIO GALAXIES; NUCLEI; GAS; PHOTOIONIZATION; EXCITATION; CLOUDS; MODEL SO - Astronomy & Astrophysics 2003 ;405(3):975-980 7458 UI - 8234 AU - Biondi F AU - Estrada IG AU - Ruiz JCG AU - Torres AE AD - Univ Nevada, Dept Geog, Reno, NV 89557, USAUniv Colima, Colima 28045, MexicoBiondi, F, Univ Nevada, Dept Geog, Mail Stop 154, Reno, NV 89557, USA TI - Tree growth response to the 1913 eruption of Volcan de Fuego de Colima, Mexico AB - The impact of volcanic eruptions on forest ecosystems can be investigated using dendrochronological records. While long-range effects are usually mediated by decreased air temperatures, resulting in frost rings or reduced maximum latewood density, local effects include abrupt suppression of radial growth, occasionally followed by greater than normal growth rates. Annual rings in Mexican mountain pine (Pinus hartwegii Lindl.) on Nevado de Colima, at the western end of the Mexican Neovolcanic Belt, indicate extremely low growth in 1913 and 1914, following the January 1913 Plinian eruption of Volcan de Fuego, 7.7 km to the south. That event, which is listed among the largest explosive eruptions since A.D. 1500, produced ashflow deposits up to 40 m thick and blanketed our study area on Nevado de Colima with a tephra. fallout 15-30 cm deep. Radial growth reduction in 1913-14 was greater than or equal to30% in 73% of the sampled trees. We geostatistically investigated the ecological impact of the eruption by mapping the decrease in xylem increment and found no evidence of a spatial structure in growth reduction. Little information has been available to date on forest species as biological archives of past environments in the North American tropics, yet this historical case study suggests that treeline tropical sites hold valuable records of prehistoric phenomena, including volcanic eruptions. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Colima MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0033-5894 UR - ISI:000183386500002 L2 - dendrochronology;ecology;timberline;treeline;neotropics;volcanology;MOUNT-ST-HELENS; MATURE ABIES-AMABILIS; TEPHRA DEPOSITION; DE-COLIMA; FOREST; RINGS; CIRCULATION SO - Quaternary Research 2003 ;59(3):293-299 7459 UI - 7697 AU - Bishop AR AU - Mihailovic D AU - de Leon JM AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USAJozef Stefan Inst, Ljubljana 1000, SloveniaCINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoBishop, AR, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Signatures of mesoscopic Jahn-Teller polaron inhomogeneities in high-temperature superconductors AB - We analyse complementary experimental results in high-temperature superconducting cuprates from x-ray absorption fine structure (XAFS), inelastic neutron scattering (INS) and inelastic x-ray scattering (IXS), Raman spectroscopy (RS), infrared absorption spectroscopy and femtosecond optical spectroscopy in terms of the predictions of a specific fully quantum mechanical calculation of small polaron formation and internal dynamics (phonon-assisted local charge oscillations). These analyses support the scenario in which the pseudogap-associated temperature, T*; marks the onset of an inhomogeneous ground state with polarons, in agreement with. several theoretical models which attempt to explain the origin of high-temperature superconductivity in doped cuprates. The change in dynamics, which is observed across the superconducting transition temperature, T-c in XAFS, INS and RS, indicates an intimate link of the dynamics of these polarons with the mechanism of high-temperature superconductivity MH - Mexico|Yucatan MH - Slovenia MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Physics, Condensed Matter U5 - J;Letter AV - English IS - 0953-8984 UR - ISI:000184718200001 L2 - INELASTIC NEUTRON-SCATTERING; T-C SUPERCONDUCTORS; CUO2 PLANE; INFRARED-ABSORPTION; OPTICAL-RESPONSE; PHONON ANOMALIES; YBA2CU3O7-DELTA; CHARGE; LA1.85SR0.15CUO4; MODEL SO - Journal of Physics-Condensed Matter 2003 ;15(9):L169-L175 7460 UI - 7229 AU - Biswas AK AU - Embid A AD - Third World Ctr Water Management, Atizapan, MexicoUniv Zaragoza, Catedrat Derecho Adm, E-50009 Zaragoza, SpainBiswas, AK, Third World Ctr Water Management, Atizapan, Mexico TI - The Spanish National Hydrological Plan - Editorial MH - Mexico|Estado De Mexico MH - Spain PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Water Resources U5 - J;Editorial Material AV - English IS - 0790-0627 UR - ISI:000185908100002 SO - International Journal of Water Resources Development 2003 ;19(3):351-352 7461 UI - 8480 AU - Biswas AK AU - Shady A AU - Lundqvist J AU - Takahashi K AD - 3rd World Ctr Water Management, Atizapan 52958, Estado Mexico, MexicoCIDA, Water & Nat Resources, Hull, PQ K1A 0G4, CanadaLinkoping Univ, SE-83 Linkoping, SwedenFdn Adv Studies, Int Dev, Chiyoda Ku, Tokyo 1020074, JapanBiswas, AK, 3rd World Ctr Water Management, Ave Manantial Oriente 27,Los Clubes, Atizapan 52958, Estado Mexico, Mexico TI - Workshop 3 (synthesis): water, poverty alleviation and social programs AB - Poverty is a complex issue, which must be understood in a holistic manner. Low and variable income is certainly a key element, but it is far from enough to portray poverty. The various characteristics of poverty and their relative strength are determined through contextually specific circumstances, in terms of history, environmental preconditions, socio-cultural traits, etc. Much of this context is made up of local and national circumstances. The consequences of globalisation must, however, increasingly to be taken into account. At a larger scale, it is also relevant to mention that climate change will have a negative, although largely unpredictable, impact for the people in some parts of the world. For those who are already living on marginal lands or who are exposed to water problems, climate change is likely to create considerable adverse effects MH - Canada MH - Japan MH - Mexico|Estado De Mexico MH - Sweden PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000182774400023 L2 - empowerment;food production;health;income generation;poverty;water rights SO - Water Science and Technology 2003 ;47(6):129-132 7462 UI - 8438 AU - Bjedov I AU - Tenaillon O AU - Gerard B AU - Souza V AU - Denamur E AU - Radman M AU - Taddei F AU - Matic I AD - Univ Paris 05, Fac Med Necker Enfants Malad, INSERM, U571, F-75730 Paris 15, FranceUniv Paris 07, Fac Med Xavier Bichat, INSERM, EO339, F-75870 Paris, FranceUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoMatic, I, Univ Paris 05, Fac Med Necker Enfants Malad, INSERM, U571, 156 Rue Vaugirard, F-75730 Paris 15, France TI - Stress-induced mutagenesis in bacteria AB - The evolutionary significance of stress-induced mutagenesis was evaluated by studying mutagenesis in aging colonies ( MAC) of Escherichia coli natural isolates. A large fraction of isolates exhibited a strong MAC, and the high MAC variability reflected the diversity of selective pressures in ecological niches. MAC depends on starvation, oxygen, and RpoS and adenosine 3',5'-monophosphate regulons; thus it may be a by-product of genetic strategies for improving survival under stress. MAC could also be selected through beneficial mutations that it generates, as shown by computer modeling and the patterns of stress-inducible and constitutive mutagenesis. We suggest that irrespective of the causes of their emergence, stress-induced mutations participate in adaptive evolution MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 100 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000183181800037 L2 - STATIONARY-PHASE MUTATION; DNA-POLYMERASE-II; ESCHERICHIA-COLI; ADAPTIVE MUTATION; MISMATCH REPAIR; GENE-EXPRESSION; POPULATIONS; MUTATORS; RPOS; RECOMBINATION SO - Science 2003 ;300(5624):1404-1409 7463 UI - 8755 AU - Bladt M AU - Neuts MF AD - IIMAS UNAY, Mexico City 01000, DF, MexicoUniv Arizona, Tucson, AZ, USABladt, M, IIMAS UNAY, AP 20-726, Mexico City 01000, DF, Mexico TI - Matrix-exponential distributions: Calculus and interpretations via flows AB - By considering randomly stopped deterministic flow models, we develop an intuitively appealing way to generate probability distributions with rational Laplace-Stieltjes transforms on [0, infinity). That approach includes and generalizes the formalism of PH-distributions. That generalization results in the class of matrix-exponential probability distributions. To illustrate the novel way of thinking, that is required to use these in stochastic models, we retrace the derivations of some results from matrix-exponential renewal theory and prove a new extension of a result from risk theory. Essentially the flow models allows for keeping track of the dynamics of a mechanism that generates matrix-exponential distributions in a similar way to the probabilistic arguments used for phase-type distributions involving transition rates, We also sketch a generalization of the Markovian arrival process (MAP) to the setting of matrix-exponential distribution. That process is known as the Rational arrival process (RAP) MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 9 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1532-6349 UR - ISI:000182103700004 L2 - matrix-exponential distributions;phase-type distributions;flow models;rational Laplace-Stieltjes transforms;rational arrival process;matrix-analytic methods;renewal theory;risk theory SO - Stochastic Models 2003 ;19(1):113-124 7464 UI - 6776 AU - Blanchon P AU - Blakeway D AD - Natl Autonomous Univ Mexico, ICML, Reef Syst Unit Pto Morelos, Cancun 77500, Q Roo, MexicoUniv Western Australia, Dept Geog, Nedlands, WA 6907, AustraliaBlanchon, P, Natl Autonomous Univ Mexico, ICML, Reef Syst Unit Pto Morelos, Ap Postal 1152, Cancun 77500, Q Roo, Mexico TI - Are catch-up reefs an artefact of coring? AB - Drill cores through modern coral reefs commonly show a time lag in reef initiation followed by a phase of rapid accretion to sea level from submerged foundations - the so-called 'catch-up response'. But because of the difficulty of drilling in these environments, core distribution is usually restricted to accessible areas that may not fully represent reef history, especially if the reef initiated in patches or developed with a prograde or retrograde geometry. As a consequence, core data have the potential to give a misleading impression of reef development, particularly with respect to the timing of initiation and response to sea-level rise. Here, we use computer models to simulate keep-up reef development and, from them, quantify variations in the timing of reef initiation and accretion rate using mock cores taken through the completed simulations. The results demonstrate that cores consistently underestimate the timing of reef initiation and overestimate the reef accretion rate so that, statistically, a core through a keep-up reef will most likely produce a catch-up pattern - an initiation lag followed by a phase of rapid accretion to sea level. This implies that catch-up signatures may be an artefact of coring and that keep-up reefs are significantly more common than previous core studies claim MH - Australia MH - Mexico|Quintana Roo PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Geology U5 - J;Article AV - English IS - 0037-0746 UR - ISI:000186913500012 L2 - computer simulation;coral reef;ecological succession;Holocene;Indo-Pacific;sea level;time lag;SEA-LEVEL RECORD; HOLOCENE REEF; GROWTH; PACIFIC; TAHITI; HAWAII; CORALS; RISE SO - Sedimentology 2003 ;50(6):1271-1282 7465 UI - 8098 AU - Blanchon P AU - Montaggioni L AD - Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Reef Syst Unit, Cancun 77500, Quintana Roo, MexicoUniv Aix Marseille 1, CNRS, UMR 6019, Dept Earth & Environm Sci, F-13331 Marseille 3, FranceBlanchon, P, Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Reef Syst Unit, AP 1152, Cancun 77500, Quintana Roo, Mexico TI - Impact of rapid sea level and climate change on late Quaternary reef development MH - France MH - Mexico|Quintana Roo PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geology U5 - J;Editorial Material AV - English IS - 0037-0738 UR - ISI:000183778900001 SO - Sedimentary Geology 2003 ;159(1-2):1-3 7466 UI - 8329 AU - Blanco-Cano X AU - Omidi N AU - Russell CT AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093, USAUniv Calif Los Angeles, IGPP, Los Angeles, CA 90024, USAUniv Calif San Diego, Calif Space Inst, La Jolla, CA 92093, USABlanco-Cano, X, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Hybrid simulations of solar wind interaction with magnetized asteroids: Comparison with Galileo observations near Gaspra and Ida AB - [1] We use a two-dimensional hybrid code (fluid electrons and particle ions) to simulate the interaction of the solar wind with a magnetized asteroid. Understanding the nature of this interaction and of the signatures such as whistler waves that can be generated in the perturbed region can help us to establish the strength of magnetization of the asteroid. We model the asteroid magnetic field as a dipole with different strengths and consider different geometries between the interplanetary magnetic field (IMF) and the solar wind flow. We find that the characteristics of the wake change dramatically with asteroidal magnetic moment. When the magnetic moment is small a whistler wake is generated. Stronger dipolar moments generate a wake with magnetosonic characteristics. Galileo data showed the existence of magnetic perturbations near asteroids Gaspra and Ida. In contrast, no magnetic signature was observed by the NEAR-Shoemaker spacecraft in the vicinity of asteroid 433 Eros. Previous works have compared Galileo observations with Hall-MHD simulations. In this work we compare the results of hybrid simulations with Galileo observations near Gaspra and Ida. Our simulations show that when the IMF is perpendicular to the solar wind flow, the interaction of the plasma with a magnetized asteroid generates a perturbation downstream of the asteroid that is formed by whistler and magnetosonic waves. This perturbation resembles in some ways the signature observed by Galileo in the vicinity of Gaspra. However, the discrepancies found between observations and simulated signatures lead us to conclude that the perturbation near Gaspra was not generated by the interaction of the solar wind with a magnetized asteroid. In the case of Ida the IMF is at 45degrees to the flow, and our simulation results differ from observations. The wave wake forms upstream of the asteroid at a distance that is small compared with observations and has a small size. Therefore we believe that the signature observed near Ida was not generated by the interaction of the solar wind with the asteroid. In both cases the observed signatures are linearly polarized resembling the magnetic discontinuities that are commonly found in the solar wind and in contrast to the nearly circularly polarized signatures of the simulations MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000183180600001 L2 - asteroid-solar wind interaction;whistler wake;magnetic fields and magnetism;FIELD SO - Journal of Geophysical Research-Space Physics 2003 ;108(A5): 7467 UI - 7045 AU - Blanco A AU - Cavin L AD - Staatl Museum Naturkunde Karlsruhe, D-76133 Karlsruhe, GermanyGis PalSedCo, Esperaza Toulouse, F-11260 Esperaza, FranceBlanco, A, Carretera Cerro Pieto Km 8, Linares, NL, Mexico TI - New Teleostei from the Agua Nueva Formation (Turonian), Vallecillo (NE Mexico) AB - A new genus and new species of an ichthyodectiform fish, a new species of the pachyrizodontid Goulmimichthys, as well as specimens of Araripichthys sp. are described from the Agua Nueva Formation (Turonian) of Vallecillo, State of Nuevo Leon, NE Mexico. The ichthyodectiform fish shows a combination of characters from different families, warranting the creation of a new genus and questioning the monophyly of these families. We report herein the first record of Goulmimichthys and Araripichthys in North America. (C) 2003 Academie des sciences. Published by Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - France MH - Germany MH - Mexico|Nuevo Leon PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 7 U4 - Paleontology U5 - J;Article AV - English IS - 1631-0683 UR - ISI:000186482400002 L2 - Cretaceous;Teleostei;Mexico;new taxa;MOROCCO; LOCALITY; GOULMIMA SO - Comptes Rendus Palevol 2003 ;2(5):299-306 7468 UI - 6665 AU - Blandon IR AU - De Leon FJ AU - Ward R AU - Van den Bussche RA AU - Needleman DS AD - Texas Parks & Wildlife Dept, Perry R Bass Marine Fisheries Res Stn, Palacios, TX 77465, USAInst Tecnol Cd Victoria, Lab Biol Integrat, Cd Victoria 87010, Tamaulipas, MexicoOklahoma State Univ, Dept Zool, Stillwater, OK 74078, USAUniv Texas, Hlth Sci Ctr, Mol Genet Core Facil, Houston, TX 77030, USAWard, R, Texas Parks & Wildlife Dept, Perry R Bass Marine Fisheries Res Stn, HC02 Box 385, Palacios, TX 77465 USA TI - Studies in conservation genetics of tarpon (Megalops atlanticus) - V. Isolation and characterization of microsatellite loci AB - The tarpon, Megalops atlanticus, supports important recreational fisheries in the Atlantic Ocean, Caribbean Sea and Gulf of Mexico. Declines in segments of these fisheries have prompted questions concerning genetic stock structure in this species. Preparatory to a survey of genetic variation in tarpon, 15 microsatellite markers were isolated. The number of alleles per locus ranged from two to 10 and observed heterozygosity ranged from 0.091 to 0.765, providing potentially useful markers for the detection of within- and among-population genetic variability MH - Mexico|Tamaulipas MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000187401800046 L2 - conservation genetics;Megalops atlanticus;microsatellite;tarpon SO - Molecular Ecology Notes 2003 ;3(4):632-634 7469 UI - 9235 AU - Blasini DR AU - Tremont RJ AU - Batina N AU - Gonzalez I AU - Cabrera CR AD - Univ Puerto Rico, Dept Chem, San Juan, PR 00931, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCabrera, CR, Univ Puerto Rico, Dept Chem, Rio Piedras Campus,POB 23346, San Juan, PR 00931 USA TI - Self-assembly of (3-mercaptopropyl)trimethoxysilane on iodine coated gold electrodes AB - The adsorption of (3-mercaptopropyl)trimethoxysilane (MPS) has been studied on iodine coated gold electrodes. The MPS adsorption from alcoholic solution on Au(I 11) and iodine coated Au(I 11) was studied by atomic force microscopy (AFM) and Xray photoelectron spectroscopy (XPS). The electrochemical formation of MPS monolayers was studied by cyclic voltammetry on polycrystalline uncoated and coated gold electrodes with different MPS pre-treatment conditions. Lead electrochemical deposition was used to probe the defect sites of the surfaces created. The MPS-over-iodine coated gold surface produces a lower-density monolayer than the MPS over pure gold. The MPS monolayer formed electrochemically on the iodine coated gold is chemically equal to its counterpart after the iodine desorption. The MPS adsorption occurs via an Au-S bond, after the partial reductive-desorption of the iodine monolayer from the iodine coated gold electrode, and produces an ordered composite monolayer of MPS/iodine. The size of the defects can be controlled by varying the electrochemical preparation conditions, using the following reaction: Au-I-(ads) + MPS-H-(ac) + e(-) <----> Au-MPS(ads) + H-(acs)(+) + I-(ac)(-). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Analytical;Electrochemistry U5 - J;Article AV - English IS - 0022-0728 UR - ISI:000180836800006 L2 - self-assembled monolayers;3-mercaptopropyltrimethoxysilane;gold;SCANNING-TUNNELING-MICROSCOPY; M NACL ELECTROLYTES; 3-MERCAPTOPROPYL TRIMETHOXYSILANE; UNDERPOTENTIAL DEPOSITION; REDUCTIVE DESORPTION; ORGANIC-SURFACES; THIOL MONOLAYERS; MODIFIED AU(111); ADSORPTION; SPECTROSCOPY SO - Journal of Electroanalytical Chemistry 2003 ;540():45-52 7470 UI - 8602 AU - Blazquez J AU - Ruiz J AD - CIEMAT, Nucl Fiss Dept, E-28040 Madrid, SpainININ, Natl Inst Nucl Res, Mex Toluca 52045, Ocoyoacac, MexicoBlazquez, J, CIEMAT, Nucl Fiss Dept, 22 Complutense Av, E-28040 Madrid, Spain TI - The Laguna Verde BWR/5 instability event. Some lessons learnt AB - There have been several BWR instability events reported in the past. Among them, the one occurred on January 24, 1995 at Laguna Verde BWR/5, Mexico is studied here. The power signal was divided into small blocks and each block was considered from the point of view of the noise analysis. Reactor was stable within the preliminary blocks and unstable at the final blocks, so noise signal characterisation allows us to describe the transition. to instability from stability. The lessons learned serve as a way to design very early. alarm procedures. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0149-1970 UR - ISI:000182557000024 L2 - noise analysis;BWR stability;Laguna Verde event SO - Progress in Nuclear Energy 2003 ;43(1-4):195-200 7471 UI - 7986 AU - Blitvich BJ AU - Fernandez-Salas I AU - Contreras-Cordero JF AU - Marlenee NL AU - Gonzalez-Rojas JI AU - Komar N AU - Gubler DJ AU - Calisher CH AU - Beaty BJ AD - Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropodborne & Infect Dis Lab, Ft Collins, CO 80523, USAUniv Autonoma Nuevo Leon, Nuevo Leon, MexicoCDCP, Ft Collins, CO, USABeaty, BJ, Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropodborne & Infect Dis Lab, Ft Collins, CO 80523 USA TI - Serologic evidence of West Nile virus infection in horses, Coahuila State, Mexico AB - Serum samples were obtained from 24 horses in the State of Coahuila, Mexico, in December 2002. Antibodies to West Nile virus were detected by epitope-blocking enzyme-linked immunosorbent assay and confirmed by plaque reduction neutralization test in 15 (62.5%) horses. We report the first West Nile virus activity in northern Mexico MH - USA MH - Mexico|Nuevo Leon PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 47 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000184022300015 L2 - LINKED IMMUNOSORBENT ASSAYS; ANTIBODIES; SERUM SO - Emerging Infectious Diseases 2003 ;9(7):853-856 7472 UI - 7022 AU - Blumenkranz MS AU - Palanker D AU - Sanislo SS AU - Marmor MH AU - Quiroz-Mercado H AU - Koch F AU - Kampik A AU - Miesner H AU - Amend P AD - Stanford Univ, Sch Med, Stanford, CA 94305, USAAPEC, Mexico City, DF, MexicoUniv Frankfurt, Hosp Eye, D-6000 Frankfurt, GermanyUniv Munich, Munich, GermanyZeiss Humphreys, Oberkochen, Germany TI - The pulsed electron avalanche knife in human vitreoretinal surgery; A status report MH - Germany MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607000495 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U99-U99 7473 UI - 6976 AU - Bobadilla-Morales L AU - Corona-Rivera A AU - Corona-Rivera JR AD - Univ Guadalajara, Cuperpo Acad Genet Clin & Med, CUCS, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Lab Genet Humana, CUCS, Guadalajara 44430, Jalisco, MexicoUniv Hosp Civil Belen, Unidad Citogenet OPD, Guatemala City, GuatemalaHosp Civil Juan I Menchaca, OPD, Guadalajara, Jalisco, Mexico TI - Total asymmetry in a case of severe Silver Russell syndrome MH - Guatemala MH - Mexico|Jalisco PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599700603 SO - American Journal of Human Genetics 2003 ;73(5):273-273 7474 UI - 8642 AU - Bocardo JCE AU - Cervantes LCP AU - Donizak J AU - Kolenda Z AD - CINVESTAV, Unidad Saltillo, Saltillo, Coahuila, MexicoAGH, Wydzial Met Niezelaznych, Katedra Teorii Inzynierii Procesow Met, PL-30059 Krakow, PolandBocardo, JCE, CINVESTAV, Unidad Saltillo, Monterrey Km 13-5,AP 663, Saltillo, Coahuila, Mexico TI - Numerical modeling and experimental investigation of Co-Cr-Mo alloys solidification AB - Solidification modeling based on classical macroscopic energy, mass, momentum and solute continuity equations does not allow to predict of microstructural parameters satisfactorily. In past decades several attemps have been made for the developing of modelling methodology for the coupling macro transport equations with the transformation kinetics in the micro scale. The micromodeling focused to the multicomponent alloys is still rare, despite the majority of the new industrial alloys are formed from complex multicomponent systems. The paper presents the micromodeling procedure coupled with thermodynamic calculation and experimental investigations for the Co-Cr-Mo alloys, frequently used as biomaterials for the production of endoprotheses. Both, experimental and numerical results showed that: the grain structure is mainly influenced by the cooling rate, the partition coefficients exhibit significant dependency on the cooling rate (especially for molybdenum), the high cooling rate promotes early formation of fine intragranular carbides. The experimentally obtained values of latent heat of solidification exhibit important dependency on the initial carbon content, and cannot be ignored in solidification simulations. The solidification modeling results have been verified using cooling curve analysis and metallografic investigations. It seems, that the model can be used in engineering applications for solidification simulations MH - Mexico|Coahuila MH - Poland PB - KRAKOW: POLISH ACAD SCIENCES COMMITTEE METALLURGY RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0860-7052 UR - ISI:000182221700005 L2 - MICROSTRUCTURE FORMATION SO - Archives of Metallurgy 2003 ;48(1):53-73 7475 UI - 7508 AU - Bohnel H AU - Biggin AJ AU - Walton D AU - Shaw J AU - Share JA AD - UNAM, Ctr Geociencias, Queretaro 76230, MexicoGeoforschungszentrum Potsdam, D-14473 Potsdam, GermanyMcMaster Univ, Dept Phys, Hamilton, ON L8S 4M1, CanadaUniv Liverpool, Geomagnetism Lab, Liverpool L69 7ZE, Merseyside, EnglandBohnel, H, UNAM, Ctr Geociencias, Campus Juriquilla, Queretaro 76230, Mexico TI - Microwave palaeointensities from a recent Mexican lava flow, baked sediments and reheated pottery AB - Microwave palaeointensity (PI) estimates have been produced from samples from the 1670-yr old Xitle lava flow, Mexico. Seventeen out of 19 experiments were successful, producing high-quality estimates and a mean PI of 58.3 +/- 9.5 muT, within errors of that expected from global data for the time period. The dispersion is high but could be reduced to 5.5 muT by using stricter selection criteria. Previous data, obtained by the Thellier-Coe method using samples from the same lava flow, were less successful and of much lower quality, producing a higher mean of 67.9 +/- 9.8 muT (25 out of 65 samples). This difference is most probably caused by the presence of multi-domain particles producing concave-up Arai plots combined with alteration processes affecting the Thellier-Coe experiments at higher temperatures. PI calculations restricted to the initial part of an Arai plot therefore tend to overestimate the correct values. In addition to lava samples, microwave PIs were also determined from pottery fragments recovered from the contact zone between the lava flow and the underlying baked sediments, which were also studied. These materials also provided good-quality results, with a higher mean PI of 66.8 +/- 7.1 muT, which is still statistically indistinct from that produced by the microwave analysis of the lava samples. Nevertheless, these samples seem to be less suitable for PI determinations, because they are characterised by larger magnetic grains and apparently more prone to thermally induced alteration than the lava samples. We conclude that in the case of the Xitle lava the microwave PI method is superior to the conventional Thellier-Coe method in many respects and that the results produced by the latter method, even when satisfying strict acceptance criteria, may be unreliable. However, we also draw attention to the fact that microwave-produced PI determinations, though of high technical quality, may still be prone to inaccuracy when rock magnetic parameters indicate that the material is likely to be a poor PI recorder, as for the pottery, sediment, and some of the lava samples described here. (C) 2003 Elsevier B.V. All rights reserved MH - Canada MH - United Kingdom MH - Germany MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0012-821X UR - ISI:000185325400015 L2 - microwave method;palaeointensities;holocene;lava how;Mexico;LONG-TERM VARIATIONS; ARCHEOMAGNETIC INTENSITY; FIELD INTENSITY; MAGNETIC-FIELD; XITLE VOLCANO; PALEOINTENSITY; HAWAII SO - Earth and Planetary Science Letters 2003 ;214(1-2):221-236 7476 UI - 8879 AU - Bojorquez-Tapia LA AU - Brower LP AU - Castilleja G AU - Sanchez-Colon S AU - Hernandez M AU - Calvert W AU - Diaz S AU - Gomez-Priego P AU - Alcantar G AU - Melgarejo ED AU - Solares MJ AU - Gutierrez L AU - Juarez MD AD - Univ Arizona, Sch Renewable Nat Resources, Tucson, AZ 85721, USASweet Briar Coll, Dept Biol, Sweet Briar, VA 24595, USAWorld Wildlife Fund, Mexico City 06100, DF, MexicoInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Bot, Mexico City 11340, DF, MexicoTexas Monarch Watch, Austin, TX 78704, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoBojorquez-Tapia, LA, Univ Arizona, Sch Renewable Nat Resources, Biol Sci E,Room 207, Tucson, AZ 85721 USA TI - Mapping expert knowledge: Redesigning the Monarch Butterfly Biosphere Reserve AB - Expert consultation has been used to fill the information gaps that hamper conservation planning and nature reserve design. The use of expert knowledge in conservation planning is difficult, however, because it is subjective, biased, and value-laden. Decision theory provides a systematic and comprehensive means for addressing experts' subjective-and sometimes contradictory-judgments in the design of nature reserves. Thus, the experts can separate the objective criteria from the subjective components of decision making that place value on those criteria. When linked to a geographic information system (GIS), these techniques foster consensus among experts by allowing the exploration of alternative designs in an iterative way. We used such a decision-analysis approach to redesign the Monarch Butterfly Biosphere Reserve (MBBR) in central Mexico. We examined three reserve scenarios to identify the optimal overwintering habitats considering (1) an area equivalent to the previously defined boundaries of the core zone of the MBBR (4500 ha); (2) an area equivalent to the previously defined boundaries of the whole MBBR (16,000 ha); and (3) the maximum possible extent for a new core zone. This last scenario produced an area of 21,727 ha. These results were transferred to the GIS to create the respective nominal maps that were presented to the environmental authorities, who selected the third scenario for the core zone of the new MBBR. Our results allowed us to locate the prime overwintering habitats precisely and to delimit a core area for the reserve that would minimize the inclusion of forest stands valuable to local loggers MH - USA MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 7 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000181736400007 L2 - MULTIPLE CRITERIA; DECISION-MAKING; CONSERVATION; MEXICO SO - Conservation Biology 2003 ;17(2):367-379 7477 UI - 7880 AU - Boland RP AU - Urrutia J AD - Univ Waterloo, Waterloo, ON N2L 3G1, CanadaUniv Nacl Autonoma Mexico, Inst Math, Mexico City 04510, DF, MexicoBoland, RP, Univ Waterloo, Waterloo, ON N2L 3G1, Canada TI - Partitioning polygons into tree monotone and Y-monotone subpolygons AB - A polygon Q is tree monotone if, for some highest or lowest point p on Q and for any point q interior to Q, there is a y-monotone curve from p to q whose interior is interior to Q. We show how to partition an n vertex polygon P in Theta(n) time into tree monotone subpolygons such that any y-monotone curve interior to P intersects at most two of the subpolygons. We then use this partition to further partition P into y-monotone subpolygons such that the number of subpolygons needed to cover any given y-monotone curve interior to P is O(log n). Our algorithm runs in Theta(n) time and space which is an improvement by an O(log n) factor in time and space over the best previous result MH - Canada MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000184327900092 L2 - tree monotone partition;monotone cover number;circular ray shooting SO - Computational Science and Its Applications - Icca 2003, Pt 3, Proceedings 2003 ;2669():903-912 7478 UI - 6747 AU - Bollini D AU - Rodriguez AEC AU - Dabrowski W AU - Garcia AD AU - Gambaccini M AU - Giubellino P AU - Grybos P AU - Idzik M AU - Marzari-Chiesa A AU - Montano LM AU - Prino F AU - Ramello L AU - Sitta M AU - Swientek K AU - Wheadon R AU - Wiacek P AD - Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, ItalyIst Nazl Fis Nucl, Alessandria, ItalyUniv Bologna, Dipartimento Fis, I-40126 Bologna, ItalyIst Nazl Fis Nucl, I-40126 Bologna, ItalyCEADEN, Havana, CubaAcad Min & Met, Fac Phys & Nucl Tech, Krakow, PolandUniv Ferrara, Dipartimento Fis, I-44100 Ferrara, ItalyIst Nazl Fis Nucl, Ferrara, ItalyIst Nazl Fis Nucl, I-10125 Turin, ItalyUniv Turin, Dipartimento Fis Sperimentale, I-10124 Turin, ItalyCINVESTAV, Mexico City 14000, DF, MexicoRamello, L, Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Corso Borsalino 54, I-15100 Alessandria, Italy TI - Energy resolution of a silicon detector with the RX64 ASIC designed for X-ray imaging AB - Results from a silicon microstrip detector coupled to the RX64 ASIC are presented. The system is capable of single photon counting in digital X-ray imaging, with foreseen applications to dual energy mammography and angiography. The main features of the detecting system are low noise (operation with threshold as low as approximate to4 keV is possible), good spatial resolution (a pixel of 100 mum x 300 mum when oriented edge-on) and good counting rate capability (up to one million counts per channel with a maximum rate of about 200 kHz per channel). The energy resolution of the system, as obtained with several fluorescence X-ray lines, is described. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Italy MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000187041600009 L2 - medical imaging;X-ray detection;silicon strip detectors;front-end electronics;X-ray spectroscopy;STRIP DETECTORS; MAMMOGRAPHY; READOUT; RADIOGRAPHY SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;515(3):458-466 7479 UI - 7703 AU - Boltyanski V AU - Martini H AD - CIMAT, Guanajuato 36000, MexicoTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyBoltyanski, V, CIMAT, AP 402, Guanajuato 36000, Mexico TI - Minkowski addition of H-convex sets and related Helly-type theorems AB - A natural generalization of the usual convexity notion is the notion of H-convexity. In the first part of the paper we will completely answer the question when the Minkowski sum of H-convex sets is itself an H-convex set. Based on this we are able to present, in the second part, results in the spirit of combinatorial geometry, namely some Helly-type theorems for H-convex sets. (C) 2003 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Guanajuato PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0097-3165 UR - ISI:000184717600008 SO - Journal of Combinatorial Theory Series A 2003 ;103(2):323-336 7480 UI - 7142 AU - Bonacci JF AU - Pincheira JA AU - Rodriguez ME AD - Univ Toronto, Toronto, ON, CanadaUniv Wisconsin, Madison, WI 53706, USANatl Autonomous Univ Mexico, Mexico City, DF, MexicoBonacci, JF, Univ Toronto, Toronto, ON, Canada TI - Earthquake-resistant design of reinforced concrete structures: Shortcomings of current methods. Paper by Michael D. Kotsovos, Angeliki Baka, and Emanuel Vougioukas MH - Canada MH - Mexico|Distrito Federal MH - USA PB - FARMINGTON HILLS: AMER CONCRETE INST RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Engineering, Civil;Materials Science, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0889-3241 UR - ISI:000186147300015 SO - Aci Structural Journal 2003 ;100(6):825-826 7481 UI - 8317 AU - Bonatti C AU - Gomez-Mont X AU - Viana M AD - IMPA, BR-22460320 Rio De Janeiro, BrazilCIMAT, Guanajuato 36240, MexicoUMR 5584 CNRS, Lab Topol, F-21078 Dijon, FranceViana, M, IMPA, Est D Castorina 110, BR-22460320 Rio De Janeiro, Brazil TI - Genericity of non-zero Lyapunov exponents for deterministic products of matrices AB - We propose a geometric sufficient criterium "a Furstenberg" for the existence of non-zero Lyapunov exponents for certain linear cocycles over hyperbolic transformations: non-existence of probability measures on the fibers invariant under the cocycle and under the holonomies of the stable and unstable foliations of the transformation. This criterium applies to locally constant and to dominated cocycles over hyperbolic sets endowed with an equilibrium state. As a consequence, we get that non-zero exponents exist for an open dense subset of these cocycles, which is also of full Lebesgue measure in parameter space for generic parametrized families of cocycles. This criterium extends to continuous time cocycles obtained by lifting a hyperbolic flow to a projective fiber bundle, tangent to some foliation transverse to the fibers. Again, non-zero Lyapunov exponents are implied by non-existence of transverse measures invariant under the holonomy of the foliation. We apply this last result to a natural geometric context: the geodesic flow tangent to the leaves of a foliation obtained as the suspension of a representation p : 7pi(1)(S) --> PSL(2, C) of the fundamental group of a hyperbolic compact surface. We prove the existence of non-zero Lyapunov exponents for the corresponding cocycle, for rho in a dense open subset of all the representations. As a consequence we get that this foliated geodesic flow has a unique Sinai-Ruelle-Bowen measure MH - Brazil MH - France MH - Mexico|Guanajuato PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied U5 - J;Article AV - French IS - 0294-1449 UR - ISI:000183317400002 L2 - linear cocycle;Lyapunov exponents;vector bundle;projective bundle;holomorphic foliation;group representations;AXIOM SO - Annales de l Institut Henri Poincare-Analyse Non Lineaire 2003 ;20(4):579-624 7482 UI - 8291 AU - Bonet F AU - Grugeon S AU - Dupont L AU - Urbina RH AU - Guery C AU - Tarascon JM AD - Univ Picardie Jules Verne, Lab React & Chim Solides, UMR 6007, F-80039 Amiens 1, FranceUniv Sonora, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, MexicoGuery, C, Univ Picardie Jules Verne, Lab React & Chim Solides, UMR 6007, 33 Rue St Leu, F-80039 Amiens 1, France TI - Synthesis and characterization of bimetallic Ni-Cu particles AB - Bimetallic Ni-Cu particles were synthesized from either suspensions of nickel carbonate and copper carbonate, and solutions of nickel nitrate and copper nitrate in ethylene glycol which acts both as solvent and reducing agent. The nature and composition of the powders depend on both the reaction temperature and time, and the reactants. Using the carbonates, bimetallic Ni-Cu powders composed of a nickel-rich and a copper-rich solid solution were obtained after 39 h at 140degreesC. Increasing the reaction temperature to 190degreesC gives a Ni-Cu powder composed of a copper-rich solid solution and nickel. Particles obtained under these conditions, however, are polydisperse. The nitrate solution gave bimetallic Ni-Cu particles with a narrow size distribution of about 140 nm after 4 h of reaction at 196degreesC. These particles are made of a copper core and a nickel shell. The mechanism of bimetallic particle formation is controlled by the solubility of the reactants, the formation of intermediate metal glycolates and Cu2O, and the required reduction temperature. (C) 2003 Elsevier Science (USA). All rights reserved MH - France MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000183286200017 L2 - ethylene glycol;Ni-Cu bimetallic particles;Ni-Cu solid solution;nickel carbonate;copper carbonate;nickel nitrate;copper nitrate;OXIDE FUEL-CELL; DIRECT OXIDATION; CATALYSTS; METHANE; HYDROGENATION; HYDROCARBONS; GROWTH SO - Journal of Solid State Chemistry 2003 ;172(1):111-115 7483 UI - 7633 AU - Bonilla-Fernandez P AU - Lopez-Cervantes M AU - Torres-Sanchez LE AU - Tortolero-Luna G AU - Lopez-Carrillo L AD - Natl Natl Publ Hlth, Cuernavaca 62508, Morelos, MexicoMexicol Natl Inst Hlth, Mexico City, DF, MexicoUniv Texas, MD Anderson Canc Ctr, Houston, TX 77030, USALopez-Carrillo, L, Natl Natl Publ Hlth, Av Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Nutritional factors and breast cancer in Mexico AB - Breast cancer(BC) morbidity and mortality in Mexico are on the rise, affecting younger women with more frequency. Nutritional factors are often mentioned as determinants of BC but their relevance is not well established in Latin-American countries, where dietary habits show great variation. From a study population previously assembled in Mexico City, 141 histologically confirmed cases of BC were matched by age (+/- 3 yr) to an equal number of hospital controls. A food frequency questionnaire was administered to all subjects and the risk of BC was estimated in relation to the intake of selected nutrients. The findings of this study show a protective effect against BC due to a high intake of polyunsaturated fat (odds ratio, OR = 0.1, 95% CI = 0.02-0.40, P for trend = 0.001) and vitamin E(OR = 0.10, 95% CI = 0.02-0.44, P for trend = 0.003) among postmenopausal women. In addition, our findings also suggest that a high intake of total fiber (OR = 0.29, 95% CI = 0.08-1.10, P for trend = 0.080) and carotenes (OR = 0.42, 95% CI = 0.16-1.14, P for trend = 0.088) lowers BC risk among premenopausal women. The relationship between the intake of nutrients and BC risk needs further confirmation MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 5 U4 - Oncology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0163-5581 UR - ISI:000184922100002 L2 - POLYUNSATURATED FATTY-ACIDS; OXIDATIVE DNA-DAMAGE; HIGH-FIBER DIET; VITAMIN-E; SERUM CAROTENOIDS; MAMMARY TUMORIGENESIS; HUMAN-LYMPHOCYTES; BETA-CAROTENE; RISK; WOMEN SO - Nutrition and Cancer-An International Journal 2003 ;45(2):148-155 7484 UI - 7519 AU - Bonilla E AU - del Mazo J AD - CSIC, Ctr Invest Biol, Dept Biol Celular & Desarrollo, Madrid 28006, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Mexico City 09340, DF, Mexicodel Mazo, J, CSIC, Ctr Invest Biol, Dept Biol Celular & Desarrollo, Velazquez 144, Madrid 28006, Spain TI - Deregulation of gene expression in fetal oocytes exposed to doxorubicin (vol 65, pg 1701, 2003) MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Correction AV - English IS - 0006-2952 UR - ISI:000185323000021 SO - Biochemical Pharmacology 2003 ;66(5):875-875 7485 UI - 8353 AU - Bonilla E AU - del Mazo J AD - CSIC, Ctr Invest Biol, Dept Biol Celular & Desarrollo, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Mexico City 09340, DF, Mexicodel Mazo, J, CSIC, Ctr Invest Biol, Dept Biol Celular & Desarrollo, Velazquez 144, E-28006 Madrid, Spain TI - Deregulation of gene expression in fetal oocytes exposed to doxorubicin AB - Doxorubicin is an effective anticancer drug but its use is limited due to its adverse side effects such as infertility and cardiomyopathy. Some possible mechanisms of the action of doxorubicin have been postulated, but the initial gene deregulation response has not been investigated. Fetal life stages are critical periods in mammalian oogenesis. This study analyzes gene expression alterations in mouse fetal oocytes exposed in vitro to this anticancer agent. cDNA libraries were generated from isolated fetal oocytes and differential screenings performed with cDNAs from in vitro doxorubicin-treated and -untreated oocytes. Differentially expressed genes were assessed by real-time RT-PCR to quantify the extent of their transcriptional control in doxorubicin-exposed oocytes. The results show that doxorubicin alters the expression of genes involved in the mitochondrial respiratory chain, intracellular transport and cell differentiation. Finally, the up-regulation of a differentially expressed gene (metaxin) mediated by its promoter was evaluated in a functional assay. When treated with doxorubicin. somatic cells transfected with a genetic construct including the promoter of metaxin and a reporter gene showed increases in expression similar to those observed in fetal oocytes. This demonstrates the direct effect of agent on the regulation of a specific gene. (C) 2003 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0006-2952 UR - ISI:000183213400014 L2 - doxorubicin;fetal oocyte;gene regulation;metaxin;mitochondria;S-ADENOSYLMETHIONINE; INDUCED APOPTOSIS; TUMOR-CELLS; MITOCHONDRIA; ADRIAMYCIN; QUANTIFICATION; SUPPRESSION; METAXIN; COMPLEX; MOUSE SO - Biochemical Pharmacology 2003 ;65(10):1701-1707 7486 UI - 9013 AU - Bordehore C AU - Ramos-Espla AA AU - Riosmena-Rodriguez R AD - Univ Alacant, Unitat Biol Marina, Alacant, SpainUniv Autonoma Baja California Sur, Programa Bot Marina, Dept Marine Biol, La Paz, Baja Calif Sur, MexicoInst Espanol Oceanog, Murcia, SpainBordehore, C, Ajuntament Denia, Med Ambient, Alacant 03700, Spain TI - Comparative study of two maerl beds with different otter trawling history, southeast Iberian Peninsula AB - 1. A comparative study of the characteristics of sediment structure and associated assemblages was conducted in two areas with different trawling histories, one with low trawling pressure and protected since 1989 (Marine Reserve of Tabarca), and another with a high frequency of trawling (Benidorm). 2. The study was based on seasonal quantitative and qualitative sampling of macrofauna, megafauna and algae, over a period of 1 year, using scuba diving and dredging. 3. Sediment composition differed between sites. Overall Tabarca had a coarser sediment than Benidorm where there was a higher mud content and no vertical stratification. At Tabarca there was a differential vertical profile, with a higher percentage of coarse sediment in the surficial horizon, which corresponded mostly to rhodoliths. Benidorm. had more mineral gravel, and Tabarca a higher percentage of biogenic gravel. 4. There were no differences between sites in the percentages of live and dead rhodolitbs in the sediment. Cover of rhodoliths, however, was four times greater at Tabarca. Maximum size of rhodoliths was greater at Tabarca ( mean 16.18mm S.D. 5.73) than at Benidorm (mean 7.64 mm S.D. 2.16). 5. The number of species of algae did not differ significantly between sites: 155 species were found at Tabarca, and 153 at Benidorm, with 13 and 10 exclusive species respectively. Although both algal assemblages were qualitatively similar, there were significant differences in the cover of the main species. At Tabarca, the cover of Corallinales was around 50% of total algal cover, while at Benidorm approximately 90% of the cover was due to non-Corallinales algae, mainly species from the genus Peysonnelia. 6. The number of macrofaunal species at Tabarca was greater than at Benidorm, with 293 (144 exclusive spp.) and 204 (53 exclusive spp.) species, respectively. Density and biomass of macrofauna was also greater at Tabarca. 7. Based on our observations, well preserved Mediterranean maerl grounds are sites with a high diversity and also support a high macrobenthic secondary production which may be important for species of commercial interest. High trawling pressure on maerl areas may affect assemblages negatively by breaking up rhodoliths, diminishing their cover and hence affecting the associated biota. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Baja California Sur MH - Spain PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Marine & Freshwater Biology;Water Resources U5 - J;Article AV - English IS - 1052-7613 UR - ISI:000181453100005 L2 - maerl;rhodolith;trawling impacts;macrofauna;Mediterranean;DISTURBANCE; HABITATS; GULF SO - Aquatic Conservation-Marine and Freshwater Ecosystems 2003 ;13():S43-S54 7487 UI - 6379 AU - Borkovska LV AU - Baran MP AU - Korsunska NO AU - Markevich IV AU - Singaevsky OF AU - Sheinkman MK AU - Torchynska TV AD - NASU, V Lashkaryov Inst Semicond Phys, UA-03028 Kiev, UkraineInst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoBorkovska, LV, NASU, V Lashkaryov Inst Semicond Phys, 45 Prospect Nauky, UA-03028 Kiev, Ukraine TI - Redistribution of mobile point defects in CdS crystals under ultrasound treatment AB - In CdS crystals, the influence of ultrasound (US) pulses on photocurrent, thermally stimulated current and edge emission spectra was observed. The effect was found to intensify with dislocation density. The analysis of obtained results showed that US treatment resulted in the decrease of shallow donor density in crystal bulk and its increase in near dislocation regions. This process of donor gettering by dislocations was shown to be one of the mechanisms of electron-beam-pumped CdS-based lasers degradation. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000188300200047 L2 - point defects;ultrasound;dislocations SO - Physica B-Condensed Matter 2003 ;340():258-262 7488 UI - 7985 AU - Boru G AU - van Ginkel M AU - Trethowan RM AU - Boersma L AU - Kronstad WE AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoOregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USATrethowan, RM, CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, Mexico TI - Oxygen use from solution by wheat genotypes differing in tolerance to waterlogging AB - Inadequate availability of oxygen to the roots is a major growth-limiting factor for plants exposed to waterlogging stress. Spring breadwheat genotypes ( Triticum aestivum L.) have been found to differ in their tolerance to waterlogging. Three spring wheat genotypes tolerant to waterlogging ( Ducula, Prl/Sara, and Vee/Myna) and two sensitive spring wheat genotypes ( Seri-82, and Kite/Glen) were evaluated for differences in root anatomy and O-2 depletion rates from nutrient solution in growth chamber experiments conducted under both aerobic and hypoxic conditions. Plants in the aerobic treatment were grown for four to five weeks under continuous aerobic conditions. Plants in the hypoxic treatment were initially grown aerobically for two to three weeks followed by two to three weeks of hypoxic conditions. The percent root porosity ranged from 12 to 20% (v/v) for tolerant genotypes and from 6 to 8% for sensitive genotypes grown under hypoxic conditions. Decreasing O-2 supply increased the rate of O-2 uptake in waterlogging tolerant cultivars. Anatomical differences in root structure between tolerant and sensitive genotypes could not be related to observed differences in O-2 use. Although inconclusive, the results suggest that in addition to oxygen transport, the movement of photosynthate to the roots under waterlogged conditions may also be important in conferring tolerance MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000184071700003 L2 - bread wheat;oxygen up-take;roots;waterlogging;TRITICUM-AESTIVUM L; CARBOHYDRATE STATUS; ROOT ANAEROBIOSIS; SEEDLINGS; GROWTH; HYPOXIA; PLANTS; RICE; RESPIRATION; AERATION SO - Euphytica 2003 ;132(2):151-158 7489 UI - 8571 AU - Bosze EJ AU - Hirata GA AU - Shea-Rohwer LE AU - McKittrick J AD - Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoSandia Natl Labs, Albuquerque, NM 87185, USAMcKittrick, J, Univ Calif San Diego, Dept Mech & Aerosp Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA TI - Improving the efficiency of a blue-emitting phosphor by an energy transfer from Gd3+ to Ce3+ AB - The low-voltage efficiency of the blue-emitting phosphor, cerium activated yttrium silicate (Y1-mCem)(2)SiO5, has been improved by co-activating with gadolinium, (Y1-m-nCemGdn)(2)SiO5. Gd3+ improves the efficiency by transferring energy to Ce3+, and makes this phosphor a more promising candidate for low-voltage field emission flat panel displays. Low-voltage cathodoluminescence and photoluminescence measurements were made to determine the optimum concentrations of Gd3+ that yielded the most luminous efficient phosphor. For photoluminescence, Ce3+ Most efficiently luminesces at the excitation wavelength lambda(ex) = 358 nm. Co-activating with Gd3+ did not improve the photoluminescent efficiency because Gd3+ does not absorb at Ce3+ excitation energy, and thus cannot transfer energy. For low-voltage cathodoluminescence, co-activating with Gd3+ did improve the efficiency since Gd3+ was sufficiently excited, with the optimum composition found to be (Y0.8425Ce0.0075Gd0.15)(2)SiO5. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000182564500006 L2 - cathodoluminescence;photoluminescence;luminescence efficiency;energy transfer;COMBUSTION PROCESS; OXYORTHOSILICATES; TB3+ SO - Journal of Luminescence 2003 ;104(1-2):47-54 7490 UI - 8965 AU - Bosze EJ AU - McKittrick J AU - Hirata GA AD - Univ Calif San Diego, Dept Mech & Aerosp Engn, Mat Sci & Engn Program, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoMcKittrick, J, Univ Calif San Diego, Dept Mech & Aerosp Engn, Mat Sci & Engn Program, Bldg EBU 2,9500 Gilman Dr, La Jolla, CA 92093 USA TI - Investigation of the physical properties of a blue-emitting phosphor produced using a rapid exothermic reaction AB - The blue-emitting phosphor cerium activated yttrium silicate, (Y1-mCem)(2)SiO5, was prepared via a novel synthesis technique called combustion synthesis. Combustion synthesis involves a highly exothermic redox reaction between metal nitrates and an organic fuel to produce a solid powder. The combustion synthesis parameter, the fuel-to-oxidizer ratio, has a direct effect on the physical properties of the as-synthesized powders due to the reaction temperature being dependent on the variation of this ratio. Thus, varying the fuel-to-oxidizer ratio produced powders with varying crystallite sizes, carbon contamination and surface areas, which in turn affected the luminescent efficiencies of the as-synthesized powders. The reaction temperature was found to reach a maximum with a 60% fuel rich mixture, with the powders exhibiting the largest crystallite sizes, smallest surface area and carbon contamination, and highest luminescent efficiency in the as-synthesized state. As-synthesized powders exhibit a high degree porosity due to the large amount of gas to solid formed. To more accurately predict the specific surface areas of porous powders, the standard geometrical model used for gas absorption measurements was modified for porous particles and found to more accurately predict the specific surface area of highly porous powders. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000181469800010 L2 - combustion synthesis;phosphor;fuel-to-oxidizer ratio;surface ratio;COMBUSTION SYNTHESIS PROCESS; OXYORTHOSILICATES; TB3+ SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2003 ;97(3):265-274 7491 UI - 6908 AU - Bottcher A AU - Karlovich YI AU - Spitkovsky IM AD - Coll William & Mary, Dept Math, Williamsburg, VA 23187, USATU Chemnitz, Fak Math, D-09107 Chemnitz, GermanyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoSpitkovsky, IM, Coll William & Mary, Dept Math, Williamsburg, VA 23187 USA TI - The C*-algebra of singular integral operators with semi-almost periodic coefficients AB - We establish a Fredholm criterion for the operators belonging to the C*-algebra generated by singular integral operators with semi-almost periodic matrix coefficients. The result is applied to Toeplitz-like operators that are perturbed by integral operators with fixed singularities at infinity, in which case it leads to an effectively verifiable Fredholm criterion together with an index formula. Our approach is based on an isomorphism theorem for C*-algebras associated with C*-dynamical systems and the notion of canonical generalized AP factorization for almost periodic matrix functions. (C) 2003 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0022-1236 UR - ISI:000186642000006 L2 - singular integral operator;Toeplitz operator;almost periodic function;semi-almost periodic function;matrix function;C*-algebra;C*-dynamical system;TOEPLITZ-OPERATORS; SYMBOLS SO - Journal of Functional Analysis 2003 ;204(2):445-484 7492 UI - 7246 AU - Bottcher M AU - Marscher AP AU - Ravasio M AU - Villata M AU - Raiteri CM AU - Aller HD AU - Aller MF AU - Terasranta H AU - Mang O AU - Tagliaferri G AU - Aharonian F AU - Krawczynski H AU - Kurtanidze OM AU - Nikolashvili MG AU - Ibrahimov MA AU - Papadakis IE AU - Tsinganos K AU - Sadakane K AU - Okada N AU - Takalo LO AU - Sililanpaa A AU - Tosti G AU - Ciprini S AU - Frasca A AU - Marilli E AU - Robb R AU - Noble JC AU - Jorstad SG AU - Hagen-Thorn VA AU - Larionov VM AU - Nesci R AU - Maesano M AU - Schwartz RD AU - Basler J AU - Gorham PW AU - Iwamatsu H AU - Kato T AU - Pullen C AU - Benitez E AU - de Diego JA AU - Moilanen M AU - Oksanan A AU - Rodriguez D AU - Sadun AC AU - Kelly M AU - Carini MT AU - Miller HR AU - Catalano S AU - Dultzin-Hacyan D AU - Fan JH AU - Ghisellini G AU - Ishioka R AU - Karttunen H AU - Keinanen P AU - Kudryavtseva NA AU - Lainela M AU - Lanteri L AU - Larionova EG AU - Matsumoto K AU - Mattox JR AU - McHardy I AU - Montagni F AU - Nucciarelli G AU - Ostorero L AU - Papamastorakis J AU - Pasanen M AU - Sobrito G AU - Uemura M AD - Ohio Univ, Dept Phys & Astron, Athens, OH 45701, USABoston Univ, Dept Astron, Boston, MA 02215, USAOsserv Astron Brera, I-23807 Merate, ItalyOsserv Astron Torino, Ist Nazl Astrofis, I-0025 Pino Torinese, ItalyUniv Michigan, Dept Astron, Ann Arbor, MI 48109, USAHelsinki Univ Technol, Metsahovi Radio Observ, Kylmala 02540, FinlandUniv Kiel, Inst Expt & Angew Phys, D-24118 Kiel, GermanyMax Planck Inst Kernphys, D-69029 Heidelberg, GermanyWashington Univ, Dept Phys, St Louis, MO 63110, USAAbastumani Observ, GE-383762 Abastumani, Rep of GeorgiaAstrophys Inst Potsdam, D-14482 Potsdam, GermanyLandessternwarte Heidelberg Konigstuhl, D-69117 Heidelberg, GermanyUzbek Acad Sci, Ulugh Beg Astron Inst, Tashkent 700052, UzbekistanIsaac Newton Inst Chile, Uzbekistan Branch, Tashkent, UzbekistanUniv Crete, Dept Phys, Iraklion 71003, Crete, GreeceFdn Res & Technol Hellas, IESL, Iraklion 71110, Crete, GreeceOsaka Kyoiku Univ, Astron Inst, Kashiwara, Osaka 5828582, JapanTuorla Observ, Piikkio 21500, FinlandUniv Perugia, Osservatorio Astron, I-06126 Perugia, ItalyOsserv Astrofis Catania, I-95125 Catania, ItalyUniv Victoria, Dept Phys & Astron, Victoria, BC V8W 2Y2, CanadaBoston Univ, Inst Astrophys Res, Boston, MA 02215, USAGuangzhou Univ, Ctr Astrophys, Guangzhou 510400, Peoples R ChinaSt Petersburg State Univ, Astron Inst, St Petersburg 198504, RussiaUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, ItalyUniv Missouri, Dept Phys & Astron, St Louis, MO 63121, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAKyoto Univ, Fac Sci, Dept Astron, Kyoto, JapanClarke & Coyote Astrophys Observ, Wilton, CA 95693, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoNyrola Observ, Jyvaskyla 40950, FinlandGuadarrama Observ, Madrid 28409, SpainUniv Colorado, Dept Phys, Denver, CO 80217, USAWestern Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42104, USAGeorgia State Univ, Dept Phys & Astron, Atlanta, GA 30303, USAFrancis Marion Univ, Dept Chem Phys & Astron, Florence, SC 29501, USAUniv Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandUniv Turin, Dipartimento Fis Gen, I-10125 Turin, ItalyBottcher, M, Ohio Univ, Dept Phys & Astron, Clippinger 339, Athens, OH 45701 USA TI - Coordinated multiwavelength observations of BL Lacertae in 2000 AB - BL Lacertae (BL Lac) was the target of an extensive multiwavelength monitoring campaign in the second half of 2000. Simultaneous or quasi-simultaneous observations were taken at radio (University of Michigan Radio Astronomy Observatory and Metsahovi Radio Telescope) and optical ( Whole Earth Blazar Telescope [WEBT] collaboration) frequencies, in X-rays (BeppoSAX and RXTE), and at very high energy gamma rays (HEGRA). The WEBT optical campaign achieved an unprecedented time coverage, virtually continuous over several 10 - 20 hr segments. It revealed intraday variability on timescales of similar to 1.5 hr and evidence for spectral hardening associated with increasing optical flux. During the campaign, BL Lac underwent a major transition from a rather quiescent state prior to 2000 September, to a flaring state for the rest of the year. This was also evident in the X-ray activity of the source. BeppoSAX observations on July 26-27 revealed a rather low X-ray flux and a hard spectrum, while a BeppoSAX pointing on 2000 October 31 - November 2 indicated significant variability on timescales of less than or similar to a few hours and provided evidence for the synchrotron spectrum extending out to similar to 10 keV during that time. During the July 26-27 observation, there is a tantalizing, although not statistically significant, indication of a time delay of similar to 4-5 hr between the BeppoSAX and the R-band light curves. Also, a low-significance detection of a time delay of 15 days between the 14.5 and 22 GHz radio light curves is reported. Several independent methods to estimate the comoving magnetic field in the source are presented, suggesting a value of similar to 2e(B)(2/7) G, where e(B) is the magnetic field equipartition factor with respect to the electron energy density in the jet MH - USA MH - Canada MH - United Kingdom MH - Finland MH - Germany MH - Greece MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China MH - Rep of Georgia MH - Russia MH - Spain MH - Uzbekistan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185916000011 L2 - BL Lacertae objects : individual (BL Lacertae);galaxies : active;gamma rays : theory;radiation mechanisms : nonthermal;HIGH-ENERGY EMISSION; TEV GAMMA-RAYS; X-RAY; 1997 OUTBURST; SPECTRAL VARIABILITY; BACKGROUND-RADIATION; OBJECT PKS-2155-304; BLAZAR MODEL; JETS; LAC SO - Astrophysical Journal 2003 ;596(2):847-859 7493 UI - 7741 AU - Boue M AU - Hernandez-Hernandez D AU - Ellis RS AD - Trent Univ, Dept Math, Peterborough, ON K9L 1Z6, CanadaCtr Invest Matemat, Guanajuato 36000, Gto, MexicoUniv Massachusetts, Dept Math, Amherst, MA 01003, USABoue, M, Trent Univ, Dept Math, Peterborough, ON K9L 1Z6, Canada TI - Large deviations for a random walk model with state-dependent noise AB - In this paper we prove the large deviation principle for a class of random walks with state-dependent noise. This type of model has important applications in queueing and communication theory and in the area of stochastic approximation MH - Canada MH - Mexico|Guanajuato MH - USA PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 0363-0129 UR - ISI:000184586300003 L2 - stochastic algorithms;large deviations;Laplace principle;weak convergence;ALGORITHMS SO - Siam Journal on Control and Optimization 2003 ;42(3):810-838 7494 UI - 8618 AU - Boule NG AU - Tremblay A AU - Gonzalez-Barranco J AU - guilar-Salinas CA AU - Lopez-Alvarenga JC AU - Despres JP AU - Bouchard C AU - Gomez-Perez FJ AU - Castillo-Martinez L AU - Rios-Torres JM AD - Univ Laval, PEPS, Div Kinesiol, St Foy, PQ G1K 7P4, CanadaUniv Laval, Dept Food Sci & Nutr, Ste Foy, PQ, CanadaNatl Inst Med Sci & Nutr Salvador Zubiran, Mexico City, DF, MexicoPennington Biomed Res Ctr, Baton Rouge, LA, USATremblay, A, Univ Laval, PEPS, Div Kinesiol, St Foy, PQ G1K 7P4, Canada TI - Insulin resistance and abdominal adiposity in young men with documented malnutrition during the first year of life AB - OBJECTIVE: The main objective of the study was to examine the effect of early life malnutrition on the relation between insulin sensitivity and abdominal adiposity in adulthood. It was hypothesised that participants with early life malnutrition would display a more pronounced deterioration of insulin sensitivity in association with a gain in abdominal fat. DESIGN: As a first attempt to investigate this issue, we studied the effect of body fat gains in a cross-sectional context. SUBJECTS: A total of 26 young adult men with evidence of malnutrition during the first year of life and 27 control subjects were recruited for this study. Malnutrition status was determined from medical files of paediatric hospitals in the Mexico City metropolitan area. MEASUREMENTS: Insulin sensitivity was measured by hyperinsulinaemic euglycaemic clamp, and body composition was measured by anthropometrics, bioelectrical impedance and computed tomography. RESULTS: There was a negative correlation between total abdominal adipose tissue area and insulin sensitivity in the previously malnourished and control groups (r(2)=0.65 and 0.35, P<0.01, respectively). When matched for low amounts of abdominal fat (114 cm(2)), participants with and without early life malnutrition had similar insulin sensitivity (9.03 vs 8.88 mg kg(-1) min(-1)). However, when matched for high amounts of abdominal fat (310 cm(2)) participants who were malnourished during the first year of life had lower insulin sensitivity (4.74 vs 6.85 mg kg(-1) min(-1), P<0.05). CONCLUSION: Higher levels of abdominal adipose tissue are more detrimental to insulin sensitivity in previously malnourished individuals MH - Canada MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 0307-0565 UR - ISI:000182427600008 L2 - body mass index;abdominal fat;malnutrition;birth weight;insulin resistance;DEPENDENT DIABETES-MELLITUS; FETAL GROWTH; GLUCOSE-TOLERANCE; PIMA-INDIANS; OBESITY; BIRTH; CHILDREN; SIZE; BORN; FAT SO - International Journal of Obesity 2003 ;27(5):598-604 7495 UI - 7603 AU - Bourget E AU - Ardisson PL AU - Lapointe L AU - Daigle G AD - Univ Laval, Dept Biol, GIROQ, Quebec City, PQ G1K 7P4, CanadaUnidad Merida, CINVESTAV IPN, Yucatan 97310, MexicoUniv Laval, Dept Math & Stat, Quebec City, PQ G1K 7P4, CanadaBourget, E, Univ Laval, Dept Biol, GIROQ, Quebec City, PQ G1K 7P4, Canada TI - Environmental factors as predictors of epibenthic assemblage biomass in the St. Lawrence system AB - The distribution of epibenthic invertebrate biomass in relation to environmental factors was examined in the St. Lawrence system. Biomass estimates for epibenthos sampled yearly for 9 years on 102 suspended collectors (navigation buoys), were related to environmental data from the literature (surface water temperature, water salinity, water transparency, current velocity, chlorophyll a and primary production) using a weighted multiple linear regression analysis. Regression models were generated for total biomass and the biomass of the single dominant sessile species: Mytilus edulis, Semibalanus balanoides, Balanus crenatus, Obelia longissima and Hiatella arctica. Water temperature and water transparency, as well as some biogeographic groups of buoys represented by dummy variables, collectively explained 90.6% of the variance in total biomass. Water temperature, water transparency, biogeographic groups and, to a lesser degree, primary production, were the variables having a significant influence on the biomass of individual species. The lognormal weighted multiple regression model explained up to 84.5% of the variance in M. edulis biomass data and 67.9, 70.0, 71.6 and 38.9%, respectively, of the variance in S. balanoides, O. longissima, B. crenatus and H. arctica biomass data. The need to consider simultaneous biological and environmental sampling at the relevant temporal and spatial scales to model large marine coastal ecosystems is discussed. (C) 2003 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Yucatan PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000184979400010 L2 - benthos;biomass;environmental conditions;models;scales;spatial distribution;St. Lawrence Estuary;Gulf of St. Lawrence;MUSSEL MYTILUS-EDULIS; BENTHIC EPIFAUNA; SECONDARY PRODUCTION; SUSPENDED CULTURE; BLUE MUSSEL; ESTUARY; GULF; GROWTH; ABUNDANCE; RESOURCE SO - Estuarine Coastal and Shelf Science 2003 ;57(4):641-652 7496 UI - 7916 AU - Bouvier C AU - Cisneros L AU - Dominguez R AU - Laborde JP AU - Lebel T AD - IRD, HSM, UMR Hydrosci, F-34394 Montpellier, FranceNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Nice, UMR 6012, F-06204 Nice, FranceIRD, LTHE, F-38041 Grenoble 9, FranceBouvier, C, IRD, HSM, UMR Hydrosci, BP 64501, F-34394 Montpellier, France TI - Generating rainfall fields using principal components (PC) decomposition of the covariance matrix: a case study in Mexico City AB - Risk assessment and water resources management need to get a reliable estimation not only of the temporal distribution of the rainfall events, but also of their spatial extension. Data provided by dense rain gauges network or meteorological radar are generally not long enough to supply consistent information on a given area. Using Principal Components (PC) decomposition of the correlation matrix may generate rainfall fields, in order to expand or create available data. Features of the model ensure quick simulation, because the orthogonality of the eigenvectors of the correlation matrix allows separating the time and space generation. This model was applied to an 11 year daily rainfall sample of 49 raingauges, bounded within a rectangular frame of nearly 2500 km(2) around Mexico City. In order to account for seasonality effect, only rainfields from June to September were selected. The observed rainfields may have some important intermittence in space, since a lot of them do not cover more than half the reference area. First, it is shown that the distributions of the main characteristics of both the observed and generated rainfields are very close together, which means that the model is able to deal with spatial intermittence. Then, rainfields were generated using a better resolution grid (713 points instead of 49): the so-obtained rainfields feature more chaotic structures which could be coherent with what would be observed at a smaller scale on radar images, as it will be analyzed furthermore. So this kind of model could also suit for the spatial scaling effects. This model may be easily calibrated on the basis of both time-series at a given point and a correlation matrix. The former are generally readily available, the latter may be drawn from a short period where meteorological radar images are available. Furthermore, it could be applied to any given finite duration. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000184198300008 L2 - stochastic generation;rainfall fields;Principal Components;correlation matrix;Generalized Pareto distribution;Mexico;GAUSSIAN RANDOM FUNCTIONS; SPACE-TIME RAINFALL; PARAMETER-ESTIMATION; MODEL DEFINITION; APPROXIMATION SO - Journal of Hydrology 2003 ;278(1-4):107-120 7497 UI - 8370 AU - Bozhevolnyi SI AU - Beermann J AU - Coello V AD - Univ Aalborg, Inst Phys, DK-9220 Aalborg, Ost, DenmarkCICESE Monterrey, FCFM Uanl, Mexico City, DF, MexicoBozhevolnyi, SI, Univ Aalborg, Inst Phys, Pontoppidanstroede 103, DK-9220 Aalborg, Ost, Denmark TI - Direct observation of localized second-harmonic enhancement in random metal nanostructures AB - Second harmonic (SH) scanning optical microscopy in reflection is used to image the gold film surface covered with randomly placed scatterers. SH images obtained with a tightly focused tunable (750-830 nm) laser beam show small (similar to 0.7 mum) and very bright (similar to 10(3) times the background) spots, whose locations depend on the wavelength and polarization of light. Comparing SH and fundamental harmonic (FH) images, we conclude that the localized SH enhancement occurs due to the overlap of FH and SH eigenmodes. The probability density function of the SH signal is found to follow the power-law dependence MH - Denmark MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000182928300052 L2 - SURFACE-PLASMON POLARITONS; NEAR-FIELD MICROSCOPY; 2ND-HARMONIC GENERATION; OPTICAL-EXCITATIONS; COLLOID CLUSTERS; SCATTERING; FILMS SO - Physical Review Letters 2003 ;90(19): 7498 UI - 7622 AU - brahim-Tallaa L AU - Achanzar WE AU - Brambila EM AU - Webber MM AU - Waalkes MP AD - NIEHS, Inorgan Carcinogenesis Sect, LCC, NCI, Res Triangle Pk, NC 27709, USAUniv Autonoma Puebla, Puebla 72570, MexicoMichigan State Univ, E Lansing, MI 48824, USA TI - Altered gene expression associated with arsenite-induced malignant transformation of human prostate epithelial cells MH - Mexico|Puebla MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518501048 SO - Toxicological Sciences 2003 ;72():215-215 7499 UI - 5790 AU - Brailovsky H AU - Couturier G AD - Natl Autonomous Univ Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoORSTOM, Inst Francais Rech Sci Dev Cooperat, F-75480 Paris 10, FranceBrailovsky, H, Natl Autonomous Univ Mexico, Inst Biol, Dept Zool, Apartado Postal 70153, Mexico City 04510, DF, Mexico TI - A new species of Leptoglossus (Heteroptera : coreidae : anisoscelini) associated with the Amazonian palm Mauritia flexuosa (Arecaceae : lepidocaryeae) in Peru AB - A new species, Leptoglossus hesperus (Heteroptera: Coreidae), collected in the Amazonian palm Mauritia flexuosa (Arecaceae: Lepidocaryeae), is described from Peru and compared with L. lonchoides Allen. The hind leg and male genital capsule are illustrated MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: AMER ENTOMOL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0013-872X UR - ISI:000220700700005 L2 - Leptoeglossus;heteroptera;coreidae;Mauritia flexrosa;arecaceae SO - Entomological News 2003 ;114(1):18-22 7500 UI - 7063 AU - Brainerd CJ AU - Reyna VF AU - Wright R AU - Mojardin AH AD - Univ Arizona, Dept Special Educ, Coll Educ, Tucson, AZ 85721, USAUniv Arizona, Sch Psychol, Coll Educ, Tucson, AZ 85721, USAUniv Arizona, Dept Surg, Tucson, AZ 85721, USAUniv Arizona, Dept Med, Tucson, AZ 85721, USAUniv Arizona, Dept Psychiat, Tucson, AZ 85721, USAUniv Autonoma Sinaloa, Dept Psychol, Culiacin, Sinaloa, MexicoBrainerd, CJ, Univ Arizona, Dept Special Educ, Coll Educ, POB 210069, Tucson, AZ 85721 USA TI - Recollection rejection: False-memory editing in children and adults AB - Mechanisms for editing false events out of memory reports have fundamental implications for theories of false memory and for best practice in applied domains in which false reports must be minimized (e.g., forensic psychological interviews, sworn testimony). A mechanism posited in fuzzy-trace theory, recollection rejection, is considered. A process analysis of false-memory editing is presented. which assumes that false-but-gist-consistent events (e.g., the word SOFA, when the word COUCH was experienced) sometimes cue the retrieval of verbatim traces of the corresponding true events (COUCH), generating mismatches that counteract the high familiarity of false-but-gist-consistent events. Empirical support comes from 2 qualitative phenomena: recollective suppression of semantic false memory and inverted-U relations between retrieval time and semantic false memory. Further support comes from 2 quantitative methodologies: conjoint recognition and receiver operating characteristics. The analysis also predicts a novel false-memory phenomenon (erroneous recollection rejection), in which true events are inappropriately edited out of memory reports MH - USA MH - Mexico|Sinaloa PB - WASHINGTON: AMER PSYCHOLOGICAL ASSOC RP - NOT IN FILE U3 - TC 31 U4 - Psychology;Psychology, Multidisciplinary U5 - J;Review AV - English IS - 0033-295X UR - ISI:000186332700007 L2 - FUZZY-TRACE THEORY; RECALL-TO-REJECT; PROCESS DISSOCIATION FRAMEWORK; CHILDHOOD SEXUAL ABUSE; DUAL-PROCESS MODEL; RECOGNITION MEMORY; CONJOINT RECOGNITION; UNCONSCIOUS MEMORY; RETENTION INTERVAL; STRENGTH THEORY SO - Psychological Review 2003 ;110(4):762-784 7501 UI - 7621 AU - Brambila EM AU - Achanzar WE AU - Diwan BA AU - Chen H AU - Webber MM AU - Waalkes MP AD - Univ Autonoma Puebla, Puebla 72570, MexicoNIEHS, Carcinogenesis Sect, LCC, NCI, Res Triangle Pk, NC 27709, USASAIC, Frederick, MD, USAMichigan State Univ, E Lansing, MI 48824, USA TI - Malignant transformation and DNA hypomethylation in human prostate epithelial cells chronically exposed to inorganic arsenite MH - Mexico|Puebla MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518501047 SO - Toxicological Sciences 2003 ;72():215-215 7502 UI - 8009 AU - Brandt LA AU - Ecker D AU - Rivera IG AU - Traut A AU - Mazzotti FJ AD - US Fish & Wildlife Serv, ARM Loxahatchee NWR, Boynton Beach, FL 33437, USASEMARNAT, Cancun 77500, Q Roo, MexicoUniv Florida, Dept Wildlife Ecol & Conservat, Gainesville, FL 32611, USAUniv Florida, Ft Lauderdale Res & Educ Ctr, Davie, FL 33314, USABrandt, LA, US Fish & Wildlife Serv, ARM Loxahatchee NWR, 10216 Lee Rd, Boynton Beach, FL 33437 USA TI - Wildlife and vegetation of Bayhead Islands in the ARM Loxahatchee National Wildlife Refuge AB - Wildlife and vegetation were sampled on five tree islands in the Arthur R. Marshall Loxahatchee National Wildlife Refuge from June 1999-June 2000 in order to generate a preliminary species list and examine the logistics of using various sampling techniques on bayhead tree islands. Seventy-nine vertebrate species and 19 plant species were recorded. Species richness for plants and vertebrates were similar among islands. Similarity among islands ranged from about 35 to 70% for plants and about 40 to 60% for vertebrates. Richness and similarity values for vegetation were lower than those recorded for tear-dropped shaped islands in wetlands south of the refuge probably due to differences in island topography and geographic location. Number of vertebrate species recorded by sampling method ranged from 2 to 62 with most vertebrate species recorded as observational data rather than during trapping events MH - USA MH - Mexico|Quintana Roo PB - STEUBEN: HUMBOLDT FIELD RESEARCH INST RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1528-7092 UR - ISI:000183934700002 L2 - FLORIDA EVERGLADES; TREE ISLANDS SO - Southeastern Naturalist 2003 ;2(2):179-194 7503 UI - 6916 AU - Branquinho A AU - Bustamante J AU - Moreno AF AU - Lagomasino GL AD - Univ Carlos III Madrid, Escuela Politecn Super, Dept Matemat, Leganes 28911, SpainUniv Coimbra, Dept Matemat, P-3000 Coimbra, PortugalUniv Autonoma Puebla, Fac Matemat, Puebla 72570, MexicoUniv Aveiro, Dept Matemat, P-3810 Aveiro, PortugalLagomasino, GL, Univ Carlos III Madrid, Escuela Politecn Super, Dept Matemat, C Univ 30, Leganes 28911, Spain TI - Normal indices in Nikishin systems AB - We improve the class of indices for which normality takes place in a Nikishin system and apply this in Hermite-Pade approximation of such systems of functions. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Puebla MH - Portugal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-9045 UR - ISI:000186694600008 L2 - Hermite Pade approximation;Nikishin systems;AT systems;normality SO - Journal of Approximation Theory 2003 ;124(2):254-262 7504 UI - 5781 AU - Brasil A AU - Colares AG AU - Palmas O AD - Univ Fed Ceara, Dept Matemat, BR-60455760 Fortaleza, Ceara, BrazilUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoBrasil, A, Univ Fed Ceara, Dept Matemat, BR-60455760 Fortaleza, Ceara, Brazil TI - Complete spacelike hypersurfaces with constant mean curvature in the de Sitter space: A gap theorem AB - Let M-n be a complete spacelike hypersurface with constant mean curvature H in the de Sitter space S-1(n+1). We use the operator phi = A-HI, where A is the second fundamental form of M, and the roots B-H(-) less than or equal to B-H(+) of a certain second order polynomial, to prove that either \phi\(2) equivalent to 0 and M is totally umbilical, or B-H(-) less than or equal to rootsup\phi\(2) less than or equal to B-H(+). For the case H greater than or equal to 2rootn-1/n we prove the following results: for every number B in the interval [max{0, B-H(-)}, B-H(+)] there is an example of a complete spacelike hypersurface such that rootsup \phi\(2) = B; if rootsup\phi\(2) = B-H(-) is attained at some point, then the corresponding M is a hyperbolic cylinder. We characterize the hyperbolic cylinders as the only complete spacelike hypersurfaces in S-1(n+1) with constant mean curvature, non-negative Ricci curvature and having at least two ends. We also characterize all complete spacelike hypersurfaces of constant mean curvature with two distinct principal curvatures as rotation hypersurfaces or generalized hyperbolic cylinders MH - Brazil MH - Mexico|Distrito Federal PB - URBANA: UNIV ILLINOIS URBANA-CHAMPAIGN RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0019-2082 UR - ISI:000220678900016 L2 - ROTATION HYPERSURFACES; RIEMANNIAN MANIFOLDS; SPHERES; FORMS SO - Illinois Journal of Mathematics 2003 ;47(3):847-866 7505 UI - 6945 AU - Bravo-Cuellar A AU - Garcia-Reyes G AU - Barba-Barajas M AU - Carranco-Lopez A AU - Dominguez-Rodriguez JR AU - Orbach-Arbouys S AD - Hop Paul Brousse, Serv Pharm, F-94804 Villejuif, FranceUniv Guadalajara, Ctr Invest, Biomed Occidente IMSS, CUCS, Guadalajara 44430, Jalisco, MexicoOrbach-Arbouys, S, Hop Paul Brousse, Serv Pharm, 14-16 Ave Paul Vaillant Couturier, F-94804 Villejuif, France TI - Modification by nimesulide administration of the phagocytic activity of polymorphonuclears of healthy subjects MH - France MH - Mexico|Jalisco PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Letter AV - English IS - 0753-3322 UR - ISI:000186728100008 SO - Biomedicine & Pharmacotherapy 2003 ;57(9):434-434 7506 UI - 7427 AU - Bravo-Espinosa M AU - Osterkamp WR AU - Lopes VL AD - Natl Res Ctr Sustainable Prod, Natl Inst Forestry Agr & Anim Res, Morelia, Michoacan, MexicoUS Geol Survey, Water Res Div, Tucson, AZ 85745, USAUniv Arizona, Sch Renewable Nat Resources, Tucson, AZ 85721, USABravo-Espinosa, M, Natl Res Ctr Sustainable Prod, Natl Inst Forestry Agr & Anim Res, Morelia, Michoacan, Mexico TI - Bedload transport in alluvial channels AB - Hydraulic, sediment, land-use, and rock-erosivity data of 22 alluvial streams were used to evaluate conditions of bedload transport and the performance of selected bedload-transport equations. Transport categories of transport-limited (TL), partially transport-limited (PTL), and supply-limited (SL) were identified by a semiquantitative approach that considers hydraulic constraints on sediment movement and the processes that control sediment availability at the basin scale. Equations by Parker et al. in 1982, Schoklitsch in 1962, and Meyer-Peter and Muller in 1948 adequately predicted sediment transport in channels with TL condition, whereas the equations of Bagnold in 1980, and Schoklitsch, in 1962, performed well for PTL and SL conditions. Overall, the equation of Schoklitsch predicted well the measured bedload data for eight of 22 streams, and the Bagnold equation predicted the measured data in seven streams MH - Mexico|Michoacan MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Civil;Engineering, Mechanical;Water Resources U5 - J;Article AV - English IS - 0733-9429 UR - ISI:000185408000005 L2 - alluvial channels;bed load;sediment transport;LOAD SEDIMENT TRANSPORT; GRAVEL-BED RIVERS; COLORADO; STREAM; RATES SO - Journal of Hydraulic Engineering-Asce 2003 ;129(10):783-795 7507 UI - 7418 AU - Bravo J AU - Quiroz Y AU - Pons H AU - Parra G AU - Herrera-Acosta J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - FUNDACITE Zulia, Renal Serv & Lab, Univ Hosp, Maracaibo, VenezuelaFUNDACITE Zulia, INBIOMED, Maracaibo, VenezuelaInst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City, DF, MexicoBaylor Coll Med, Div Nephrol, Houston, TX 77030, USARodriguez-Iturbe, B, Apartado Posta 1430, Maracaibo 4001 A, Venezuela TI - Vimentin and heat shock protein expression are induced in the kidney by angiotensin and by nitric oxide inhibition AB - Background. Angiotensin II (Ang II) infusion and nitric oxide synthesis (NOS) inhibition with N-omega-nitro-L-arginine-methylester (L-NAME) are experimental models of hypertension associated with renal inflammation and oxidative stress. To gain insight into the nature of the tubulointerstitial injury induced in these models, we studied lectin-binding specificities, vimentin expression, and heat shock protein (HSP) 60 and 70 in these experimental models. Methods. Sprague-Dawley rats received Ang II infusion (435 ng/kg/min) for 2 weeks by subcutaneous minipumps (Ang II group, N = 5) or L-NAME in the drinking water (70 mg/100 mL) for 3 weeks (L-NAME group N = 7). The control group consisted of 10 rats. Systolic blood pressure (tail-cuff plethysmography), serum creatinine, and proteinuria were determined weekly. At the end of the treatment period, rats were sacrificed and kidneys studied. Binding specificities of fluorescein-labeled lectins were examined in frozen sections, and cellular infiltrates were identified by immunohistology and expression of vimentin and HSP 60 and 70 with immunohistochemistry and computer image analysis. Results. Tubulointerstitial accumulation of macrophages, lymphocytes, and Ang II-positive cells were present in the Ang II group and L-NAME group. Vimentin, HSP 60, and HSP 70 were increased 8 to 20 times in the cortex of the rats of the Ang II group and the L-NAME groups. Neoexpression of vimentin and HSPs was found primarily in proximal tubular cells. Conclusion. Ang II infusion and NOS inhibition induce tubular injury with epithelial cell transdifferentiation and expression of stress proteins. The role of these changes in the accumulation and activation of the interstitial inflammatory infiltrate merits further investigation MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 3 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000185515400009 L2 - SALT-SENSITIVE HYPERTENSION; TUBULOINTERSTITIAL INJURY; INTERSTITIAL FIBROSIS; OVERLOAD PROTEINURIA; PHENOTYPIC CHANGES; GLOMERULAR DAMAGE; IMMUNE CELLS; RAT-KIDNEY; INFILTRATION; INFLAMMATION SO - Kidney International 2003 ;64():S46-S51 7508 UI - 8420 AU - Bray DB AU - Merino-Perez L AU - Negreros-Castillo P AU - Segura-Warnholtz G AU - Torres-Rojo JM AU - Vester HFM AD - Florida Int Univ, Dept Environm Studies, Miami, FL 33185, USAUniv Nacl Autonoma Mexico, Inst Invest Sociales, Condesa 06140, DF, MexicoIowa State Univ, Dept Forestry, Ames, IA 50011, USASEMARNAT, Programa Conservac & Manejo Forestal, Coyoacan 04100, DF, MexicoCIDE, Lomas De Sante Fe 01210, DF, MexicoECOSUR, Chetumal 77049, Quintana Roo, MexicoBray, DB, Florida Int Univ, Dept Environm Studies, Miami, FL 33185, USA TI - Mexico's community-managed forests as a global model for sustainable landscapes AB - Researchers concerned with sustainable management of forests in the tropics have argued that the road to improved stewardship of forest resources is the transfer of responsibility to the local communities who get their livelihoods from them. On the other hand, conservationists have declared that the only way to stem the tide of deforestation is to place as many tracts as possible under strict protection. In this context, Mexico presents a national laboratory for studying the social and ecological benefits of delivering forests to local people. As a little-noticed result of the Mexican Revolution in the second decade of the twentieth century, well over half of the forests of Mexico were placed in community-held lands. In historic struggles that passed through several phases, most of these communities have now gained substantial control over the use of their forests. Because of the substantial degree of social capital in rural forms of organization in Mexico, this control of forest resources has led to an estimated 290-479 community forest enterprises ( CFEs ), through which communities are producing timber on their own lands. New studies are beginning to suggest that important gains in both social and economic justice, good forest management, and biodiversity protection are resulting from the actions of these CFEs. As more forests globally are being devolved to local communities, it is important to carry out more research on the Mexican model of community forest management for timber production MH - Mexico|Distrito Federal MH - Mexico|Quintana Roo MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 26 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000183077800010 L2 - BIODIVERSITY CONSERVATION; SQUARE WHEEL; PARKS SO - Conservation Biology 2003 ;17(3):672-677 7509 UI - 9162 AU - Bresme F AU - Alejandre J AD - Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoBresme, F, Univ London Imperial Coll Sci Technol & Med, Dept Chem, Exhibit Rd, London SW7 2AY, England TI - Cavities in ionic liquids AB - The formation of cavities in ionic liquids in the vicinity of the liquid binodal curve is investigated by means of Monte Carlo simulations of the restricted primitive model (RPM). Analysis of the cavity size distribution functions provides a quantitative view of the hole sizes arising in ionic liquids when approaching the coexistence region. Cavities of sizes 0.1-1 nm are formed, the larger cavities being favored by the Coulombic forces. The mean cavity size grows with the square root of the temperature. We compute the reversible work needed to create a cavity in the ionic liquid and it is used to estimate the surface tension of the ionic liquid-vapor interface. The accuracy of theoretical approaches based on the scaled particle theory and Ornstein-Zernike equation to estimate the cavity work of formation in ionic liquids is discussed. We find that both simulations and integral equations predict density depletion with increasing cavity size, suggesting the existence of surface drying in ionic liquids. (C) 2003 American Institute of Physics MH - United Kingdom MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 12 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000181018700026 L2 - RESTRICTED PRIMITIVE MODEL; LENNARD-JONES FLUID; HARD-SPHERE MODEL; VAPOR INTERFACE; MONTE-CARLO; MOLECULAR-DYNAMICS; INTEGRAL-EQUATION; SURFACE-TENSION; SIMULATION; WATER SO - Journal of Chemical Physics 2003 ;118(9):4134-4139 7510 UI - 8279 AU - Brinks E AU - Walter F AU - Kerp J AD - INAOE, Puebla 72000, MexicoNatl Radio Astron Observ, AOC, Socorro, NM 87801, USARAIUB, D-53121 Bonn, GermanyWalter, F, INAOE, Apdo Postal 51 & 216, Puebla 72000, Mexico TI - X-ray emission from dwarf galaxies: IC 2574 revisited AB - Until recently, few unequivocal detections had been reported of the hot, X-ray emitting gas thought to be associated with the large, coherent structures variously described as supershells or superbubbles in dwarf irregular (dIrr) galaxies. In this contribution we report follow-up XMM-Newton and Chandra observations of our ROSAT detection of X-ray emission associated with the supergiant shell in the nearby dIrr galaxy IC 2574, a member of the M81 group of galaxies. The spectral properties of the X-ray source suggest that we are dealing with a young (age<2000 yr) supernova remnant (SNR). This SNR is most likely one of the many supernovae which have exploded in that region and which have created the impressive supergiant HI shell MH - Germany MH - Mexico|Puebla MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000183320500066 L2 - galaxies : individual (IC2574);galaxies : ISM;X-rays;SUPERBUBBLES; NGC-1569 SO - Astrophysics and Space Science 2003 ;284(2):627-630 7511 UI - 7915 AU - Brito-Castillo L AU - az-Castro S AU - Salinas-Zavala CA AU - Douglas AV AD - Ctr Invest Biol Noroeste, Guaymas 85454, Sonora, MexicoCtr Invest Biol Noroeste, La Paz, MexicoCreighton Univ, Dept Atmospher Sci, Omaha, NE 68178, USABrito-Castillo, L, Ctr Invest Biol Noroeste, KM 2-35 Camino Al Tular,Estero Bacochibampo, Guaymas 85454, Sonora, Mexico TI - Reconstruction of long-term winter streamflow in the Gulf of California continental watershed AB - Applying multiple regression techniques to tree-ring series from Sierra de la Laguna in Baja California Sur, Mexico and Sierra Madre Occidental in Durango, and Tlaxcala, Mexico (A.D. 1384-1997), reconstruction of winter streamflow was performed for data from the central and southern regions of the Gulf of California continental watershed. Each region was defined after applying Varimax Rotated Empirical Orthogonal Function analysis. Streamflow reconstruction was possible from 1840 to 1992 for the central region and from 1712 to 1993 for the southern region. The power spectrums of the reconstructed streamflow series and the Index of the Pacific Decadal Oscillation series (IPDO) show evidence of low frequency (decadal-scale) variations around 40 and 80 years. Tendencies in reconstructed streamflow series and in the IPDO are analyzed and discussed. We conclude that streamflow reconstruction was attainable on a decadal temporal scale. In this sense, the IPDO may be considered a good indicator of future tendencies (in decades) in winter streamflow in the study zone. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000184198300003 L2 - Gulf of California;tree-ring series;streamflow reconstruction;watershed;SEA-SURFACE TEMPERATURE; EL-NINO; PRINCIPAL COMPONENTS; UNITED-STATES; VARIABILITY; MEXICO; PRECIPITATION; OSCILLATION; MONSOON; CLIMATE SO - Journal of Hydrology 2003 ;278(1-4):39-50 7512 UI - 8202 AU - Brito-Castillo L AU - Douglas AV AU - Leyva-Contreras A AU - Lluch-Belda D AD - Ctr Invest Biol Noroeste SC, Unidad Guaymas, Guaymas 85454, Sonora, MexicoCreighton Univ, Dept Atmospher Sci, Omaha, NE 68178, USAUniv Nacl Autonoma Mexico, Inst Geofis, Dept Radiac Solar, Mexico City 04510, DF, MexicoCICIMAR, La Paz 23096, BCS, MexicoBrito-Castillo, L, Ctr Invest Biol Noroeste SC, Unidad Guaymas, Km 2-35 Camino Tular,POB 349,Estero Bacochibampo,, Guaymas 85454, Sonora, Mexico TI - The effect of large-scale circulation on precipitation and streamflow in the Gulf of California continental watershed AB - The interannual variability of summer and winter rainfall and streamflow in the Gulf of California continental watershed is compared. Varimax-rotated empirical orthogonal function (EOF) analysis is applied to 15 streamflow series, in the period from 1960 to 1990, and two regions are defined: a central region and a southern region. Results show that in both regions, between 1944 and 1999, the long-term rainfall variability is well explained by the long-term streamflow variability in both seasons, the result being statistically significant at the 95% level. We conclude that regional streamflows in that period are climate driven. This conclusion is reinforced when we show that the large-scale circulation (700 hPa heights) explains: (i) wet and dry conditions in both regions; (ii) conditions of wet and dry years with the same signal of El Nino and La Nina events; and (iii) long-term periods in association with the Pacific decadal oscillation (PDO). When the PDO is in its warm phase, summers are likely to be dry with an El Nino event and wet with a La Nina event. In the cool phase of the PDO, summers are influenced by more localized events (i.e. the position of the subtropical continental ridge). In winter, warm and cool phases of the PDO are likely to be associated with wet and dry winters respectively. Copyright (C) 2003 Royal Meteorological Society MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 7 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0899-8418 UR - ISI:000183617600003 L2 - Gulf of California;interannual variability;EOF analysis;PDO;large-scale circulation;streamflow;precipitation;INTERANNUAL VARIABILITY; PRINCIPAL COMPONENTS; MONSOON; PACIFIC; MEXICO; OSCILLATION; RAINFALL; CLIMATE; FIELD SO - International Journal of Climatology 2003 ;23(7):751-768 7513 UI - 7869 AU - Briz F AU - Degner MW AU - Zamarron A AU - Guerrero JM AD - Univ Oviedo, Dept Elect Comp & Syst Engn, E-33204 Gijon, SpainFord Motor Co, Sustainable Mobil Technol, Energy Syst Engn Dept, Dearborn, MI 48121, USAInst Technol, Leon 37000, MexicoBriz, F, Univ Oviedo, Dept Elect Comp & Syst Engn, E-33204 Gijon, Spain TI - Online stator winding fault diagnosis in inverter-fed AC machines using high-frequency signal injection AB - The diagnosis of stator winding faults in inverter-fed ac machines using an injected high-frequency carrier signal is presented and analyzed in this paper. Measurement of the resulting high-frequency negative-sequence current (or alternatively of the negative-sequence impedance) is used to detect turn faults at an incipient stage. Though sharing the same physical principles of similar techniques applied to,line-connected machines' the use of a high-frequency signal will be shown to present important advantages, such as providing the same performance almost independently of the fundamental excitation frequency, and drastically reducing the sensitivity to the working condition of the machine, i.e., torque and flux levels MH - Mexico|Guanajuato MH - Spain MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Multidisciplinary;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0093-9994 UR - ISI:000184370900025 L2 - fault diagnosis;high-frequency signal injection;induction motor drives;stator winding fault detection;INDUCTION; DRIVES; POSITION; MOTORS SO - Ieee Transactions on Industry Applications 2003 ;39(4):1109-1117 7514 UI - 8092 AU - Brochu M AU - Leon CA AU - Drew RAL AD - McGill Univ, Dept Met & Mat Engn, Montreal, PQ H3A 2B2, Canada. Univ Michoacana, Inst Invest Met, Michoacan 58000, Mexico TI - Application of electroless coating for processing and joining of advanced materials AB - The incompatibility of ceramics with metals can be a concern in the processing of advanced materials. The adhesion and wetting problem can be resolved by, for example, the application of coatings on the ceramic surface. A simple technique for metallic deposition on non-conductive substrates is through electroless plating. This technique was applied on different ceramic surfaces to overcome important processing difficulties. This presentation focuses on the deposition characteristics as well as implementation of the process for producing and joining advanced materials. Among the numerous examples of application of this technique, two cases will be presented. (1) Al2O3 and SiC ceramics particulates were coated with copper and nickel and then vacuum infiltrated. The metallic coating overcame the poor wettability problem of aluminum on the reinforcement. (2) Copper was deposited on titanium powder to fabricate a composite powder, which is used as an active brazing alloy for joining ceramics. The titanium powder is protected and oxidation is limited and hence a lower processing vacuum can be used MH - Canada MH - Mexico|Michoacan T3 - THERMEC'2003Materials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle1BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBW92N AV - English IS - 0255-5476 UR - ISI:000183626400399 L2 - electroless plating;copper;nickel;aluminum;silicon carbide;MMCs;silicon nitride;active brazing SO - 2003 ;():2491-2496 7515 UI - 7143 AU - Brodie JD AU - Figueroa E AU - Dewey SL AD - NYU, Sch Med, Dept Psychiat, New York, NY 10016, USAClin Integral Tratamiento Contra Adicc, Mexicali 21120, Baja California, MexicoBrookhaven Natl Lab, Dept Chem, Upton, NY 11973, USABrodie, JD, NYU, Sch Med, Dept Psychiat, New York, NY 10016, USA TI - Treating cocaine addiction: From preclinical to clinical trial experience with gamma-vinyl GABA MH - Mexico|Baja California MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 38 U4 - Neurosciences U5 - J;Article AV - English IS - 0887-4476 UR - ISI:000186082900011 L2 - cocaine addiction;gamma vinyl-GABA;GVG;vigabatrin;clinical trial;NUCLEUS-ACCUMBENS DOPAMINE; VISUAL-FIELD CONSTRICTION; INDUCED INCREASES; IRREVERSIBLE INHIBITOR; TRANSAMINASE INHIBITOR; VIGABATRIN; RATS; CONSUMPTION; EXPRESSION; ACID SO - Synapse 2003 ;50(3):261-265 7516 UI - 7136 AU - Brody CD AU - Hernandez A AU - Zainos A AU - Romo R AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoCold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USARomo, R, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Apartado Postal 70-253, Mexico City 04510, DF, Mexico TI - Timing and neural encoding of somatosensory parametric working memory in macaque prefrontal cortex AB - We trained monkeys to compare the frequencies of two mechanical vibrations applied sequentially to the tip of a finger and to report which of the two stimuli had the higher frequency. This task requires remembering the first frequency during the delay period between the two stimuli. Recordings were made from neurons in the inferior convexity of the prefrontal cortex (PFC) while the monkeys performed the task. We report neurons that fire persistently during the delay period, with a firing rate that is a monotonic function of the frequency of the first stimulus. Separately from, and in addition to, their correlation with the first stimulus, the delay period firing rates of these neurons were correlated with the behavior of the monkey, in a manner consistent with their interpretation as the neural substrate of working memory during the task. Most neurons had firing rates that varied systematically with time during the delay period. We suggest that this time-dependent activity may encode time itself and may be an intrinsic part of active memory maintenance mechanisms MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 47 U4 - Neurosciences U5 - J;Article AV - English IS - 1047-3211 UR - ISI:000186180000008 L2 - POSTERIOR PARIETAL CORTEX; PERSISTENT ACTIVITY; NEURONAL-ACTIVITY; DELAYED-RESPONSE; DECISION-MAKING; NETWORK MODEL; EYE-POSITION; REPRESENTATION; INTEGRATOR; MONKEYS SO - Cerebral Cortex 2003 ;13(11):1196-1207 7517 UI - 8344 AU - Brody CD AU - Romo R AU - Kepecs A AD - Cold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoBrody, CD, Cold Spring Harbor Lab, 1 Bungtown Rd, Cold Spring Harbor, NY 11724 USA TI - Basic mechanisms for graded persistent activity: discrete attractors, continuous attractors, and dynamic representations AB - Persistent neural activity is observed in many systems, and is thought to be a neural substrate for holding memories over time delays of a few seconds. Recent work has addressed two issues. First, how can networks of neurons robustly hold such an active memory? Computer systems obtain significant robustness to noise by approximating analogue quantities with discrete digital representations. In a similar manner, theoretical models of persistent activity in spiking neurons have shown that the most robust and stable way to store the short-term memory of a continuous parameter is to approximate it with a discrete representation. This general idea applies very broadly to mechanisms that range from biochemical networks to single cells and to large circuits of neurons. Second, why is it commonly observed that persistent activity in the cortex can be strongly time-varying? This observation is almost ubiquitous, and therefore must be taken into account in our models and our understanding of how short-term memories are held in the cortex MH - Mexico|Distrito Federal MH - USA PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 36 U4 - Neurosciences U5 - J;Review AV - English IS - 0959-4388 UR - ISI:000183092700011 L2 - DORSOLATERAL PREFRONTAL CORTEX; SPATIAL WORKING-MEMORY; EYE-POSITION; RECURRENT NETWORK; PARIETAL CORTEX; DECISION-MAKING; NEURAL ACTIVITY; DELAY ACTIVITY; UNIT-ACTIVITY; NEURONS SO - Current Opinion in Neurobiology 2003 ;13(2):204-211 7518 UI - 9098 AU - Broggini N AU - McManus LM AU - Hermann JS AU - Medina RU AU - Oates TW AU - Schenk RK AU - Buser D AU - Mellonig JT AU - Cochran DL AD - Univ Texas, Hlth Sci Ctr, Dept Periodont, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78229, USAUniv Zurich, Dept Prevent Dent, Sch Dent, Zurich, SwitzerlandUniv Zurich, Dept Periodontol, Sch Dent, Zurich, SwitzerlandUniv Zurich, Dept Cariol, Sch Dent, Zurich, SwitzerlandUniv Bern, Dept Oral Surg & Stomatol, Sch Dent Med, Bern, SwitzerlandUniv Autonoma Coahuila, Dept Orthodont, Fac Odontol, Torreon, MexicoCochran, DL, Univ Texas, Hlth Sci Ctr, Dept Periodont, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Persistent acute inflammation at the implant-abutment interface AB - The inflammatory response adjacent to implants has not been well-investigated and may influence peri-implant tissue levels. The purpose of this study was to assess, histomorphometrically, (1) the timing of abutment connection and (2) the influence of a microgap. Three implant designs were placed in the mandibles of dogs. Two-piece implants were placed at the alveolar crest and abutments connected either at initial surgery (non-submerged) or three months later (submerged). The third implant was one-piece. Adjacent interstitial tissues were analyzed. Both two-piece implants resulted in a peak of inflammatory cells approximately 0.50 mm coronal to the microgap and consisted primarily of neutrophilic polymorphonuclear leukocytes. For one-piece implants, no such peak was observed. Also, significantly greater bone loss was observed for both two-piece implants compared with one-piece implants. In summary, the absence of an implant-abutment interface (microgap) at the bone crest was associated with reduced peri-implant inflammatory cell accumulation and minimal bone loss MH - Mexico|Coahuila MH - Switzerland MH - USA PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 19 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-0345 UR - ISI:000181145500016 L2 - one-piece implant;two-piece implant;peri-implant inflammation;microgap;neutrophil;SUBMERGED TITANIUM IMPLANTS; CRESTAL BONE CHANGES; EXPERIMENTAL PERIODONTITIS; OSSEOINTEGRATED IMPLANTS; PROSPECTIVE MULTICENTER; BACTERIAL-COLONIZATION; HISTOMETRIC EVALUATION; ANTAGONISTS INHIBIT; PLAQUE; DOG SO - Journal of Dental Research 2003 ;82(3):232-237 7519 UI - 8649 AU - Bronger A AU - Sedov SN AD - Univ Kiel, Inst Geog, D-24098 Kiel, GermanyUNAM, Inst Geol, Dept Soil Sci, Mexico City, DF, MexicoBronger, A, Univ Kiel, Inst Geog, Olshaussenstr 40, D-24098 Kiel, Germany TI - Vetusols and paleosols: natural versus man-induced environmental change in the Atlantic coastal region of Morocco AB - Surface Terrae Rossae (Rhodoxeralfs), and a Terra Fusca (Petrocalcic Palexeralf) developed on mid-Quaternary calcarenites in the moister region of Rabat, show substantial pedogenic formation of clay minerals, particularly kaolinite, mainly in the fraction <0.2 μm. For the most part, the pedogenic kaolinites show poor crystallinity of the fireclay type. They are mainly formed from feldspars and perhaps also amphiboles and pyroxenes in the fractions > 2 mum, and from smectites inherited from the calcarenite-residual loam in the coarse (2-0.2 mum) and fine clay fractions (<0.2 μm). In one Terra Rossa soil, formation was interrupted twice by deposition of eolian materials, and it is regarded as a polycyclic pedocomplex. Eolian input was much less important during development of the other surface Terrae Rossae. On younger calcarenites (&GE; 100 ka) near the coast, three Rendzinas (Typic Calcixerolls) show only slight mineral weathering and pedogenic clay formation, in spite of a varied spectrum of primary minerals. In one example, kaolinite formation has just started. The Calcixerolls were probably recalcified by addition of eolian material as a result of anthropogenic thinning of the vegetation and/or due to the vicinity of the coast. These results suggest that, at least in this region, the younger Terrae Rossae of the coastal area were formed over much of the Brunhes epoch. In areas farther from the coast they have been developing for almost all of the Brunhes epoch. Because climatic fluctuations in the Quaternary were generally slight in this region, the direction of soil formation was constant. Therefore we regard the Rhodoxeralfs in the northern part of our study area as Vetusols. According to our expanded definition, Vetusols are surface soils which underwent almost constant processes of soil formation under an almost constant constellation of soil-forming factors, especially climate and vegetation, over a long period of time, including at least some part of the Pleistocene. Consequently the present patchy distribution of Terrae Rossae is hardly a result of climatically induced periods of "geomorphological activity and stability". but the result of the removal of an earlier dense forest cover, followed by severe soil erosion. The human impact on the ecosystem is much more serious than any climatic fluctuations. In the southwestern part of the study area, between El Jadida and Agadir, the soil moisture regime is dry xeric to aridic and Terrae Rossae occur only in small areas, mostly in depressions. However, two selected Rhodoxeralfs in the vicinity of Tamanar show considerable pedogenic mineral weathering and clay mineral formation, though hardly any kaolinite. The strong weathering and clay illuviation must have been preceded by decalcification, implying a distinctly moister climate here in the past. However, micromorphological features of recent recalcification are common in these Rhodoxeralfs, suggesting that their main properties are not in equilibrium with the present climate and the soils should be regarded as nonburied paleosols or relict paleosols. (C) 2002 Elsevier Science Ltd and INQUA. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1040-6182 UR - ISI:000182292200004 L2 - PLEISTOCENE POLLEN RECORD; TERRAE-ROSSAE; QUATERNARY; AFRICA; SPAIN; SLOVAKIA; SOILS; DUST SO - Quaternary International 2003 ;106():33-60 7520 UI - 8827 AU - Bronnikov KA AU - Fadeev SB AU - Michtchenko AV AD - VNIIMS, Moscow 117313, RussiaPFUR, Inst Gravitat & Cosmol, Moscow 117198, RussiaIPN, SEPI, ESIME, Mexico City 07738, DF, MexicoBronnikov, KA, VNIIMS, 3-1 M Ulyanovoy St, Moscow 117313, Russia TI - Scalar fields in multidimensional gravity. No-hair and other no-go theorems AB - Global properties of static, spherically symmetric configurations with scalar fields of sigma-model type with arbitrary potentials are studied in D dimensions, including models where the space-time contains multiple internal factor spaces. The latter are assumed to be Einstein spaces, not necessarily Ricci-flat, and the potential V includes a contribution from their curvatures. The following results generalize those known in four dimensions: (A) a no-hair theorem on the nonexistence, in case V greater than or equal to 0, of asymptotically flat black holes with varying scalar fields or moduli fields outside the event horizon; (B) nonexistence of particlelike solutions in field models with V greater than or equal to 0; (C) nonexistence of wormhole solutions under very general conditions; (D) a restriction on possible global causal structures (represented by Carter-Penrose diagrams). The list of structures in all models under consideration is the same as is known for vacuum with a cosmological constant in general relativity: Minkowski (or AdS), Schwarzschild, de Sitter and Schwarzschild - de Sitter, and horizons which bound a static region are always simple. The results are applicable to various Kaluza-Klein, supergravity and stringy models with multiple dilaton and moduli fields MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000181857900001 L2 - multidimensional gravity;black holes;particlelike solutions;wormholes;BLACK-HOLES; QUANTUM-GRAVITY; 1+1 DIMENSIONS; BARYON NUMBER; NONEXISTENCE; VACUUM SO - General Relativity and Gravitation 2003 ;35(4):505-525 7521 UI - 7078 AU - Brooks SD AU - Baumgardner D AU - Gandrud B AU - Dye JE AU - Northway MJ AU - Fahey DW AU - Bui TP AU - Toon OB AU - Tolbert MA AD - Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAUniv Mexicana, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80301, USANOAA, Aeron Lab, Boulder, CO 80303, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USAUniv Colorado, Program Atmospher & Ocean Sci, Boulder, CO 80309, USAUniv Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309, USABrooks, SD, Univ Colorado, Dept Chem & Biochem, Campus Box 215, Boulder, CO 80309 USA TI - Measurements of large stratospheric particles in the Arctic polar vortex AB - [1] During the SAGE III Ozone Loss and Validation Experiment/Third European Stratospheric Experiment on Ozone 2000 mission, the Multiangle Aerosol Spectrometer Probe ( MASP) was flown aboard the ER-2 aircraft sampling the Arctic polar vortex. On several of the flights the ER-2 flew directly through polar stratospheric clouds (PSCs), and on six of these flights the MASP sampled large particles ( 2 - 22 mum diameter). MASP large particle observations are correlated in time with the large particle signal from the NOAA NOy measurements. This is direct evidence supporting the inference of particle size made by the NOy instrument. On 20 January 2000, the day of the most intense PSC encounter, the shapes of the large particle size distributions above 9 mum observed by the MASP and simulated based on the NOy instruments are in reasonable agreement. The MASP observations show a dramatic increase in large particle volume as the temperature approaches the nitric acid trihydrate equilibrium temperature. Our study suggests that large particles containing nitric acid are present in the Arctic polar stratosphere and may lead to denitrification MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000186395300001 L2 - PSC;MASP;denitrification;LARGE HNO3-CONTAINING PARTICLES; ANTARCTIC SPRING STRATOSPHERE; NITRIC-ACID TRIHYDRATE; OZONE LOSS; REFRACTIVE-INDEXES; REACTIVE NITROGEN; VAPOR-PRESSURES; DENITRIFICATION; CLOUDS; WINTER SO - Journal of Geophysical Research-Atmospheres 2003 ;108(D20): 7522 UI - 8177 AU - Brostow W AU - Castano VM AU - Martinez-Barrera G AU - Saiter JM AD - Univ Rouen, LECAP, F-76801 St Etienne, FranceUniv N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, CFATA, Queretaro 76001, Qro, MexicoUniv Autonoma Estado Mexico, Posgrad Fac Quim, Mexico City 50000, DF, MexicoSaiter, JM, Univ Rouen, LECAP, Site Madrillet,Ave Univ,BP12, F-76801 St Etienne, France TI - Pressure-volume-temperature (P-V-T) properties of GexSe1-x inorganic polymeric glasses AB - We have studied the vitreous GexSe1-x chalcogenide alloys, varying x from 0.0 to 0.12. P-V-T results have been obtained for pressures up to 200 J cm(-3) and temperatures up to 240degreesC or so. The P*, V* and T* parameters of the Hartmann equation of state (EOS) were evaluated. With increasing Ge concentration the specific volume increases, passes through a maximum and then decreases. By contrast, the characteristic (hard-core) volume V* passes through a minimum and so does the characteristic temperature T*. On the basis of these results in conjunction with earlier ones we provide an expanded model of atomic packing and phase structures of the, alloys. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000183689500031 L2 - chalcogen;glass;GeSe;free volume;structure;STRESS-RELAXATION; CHALCOGENIDE GLASSES; SHIFT FACTOR; ALLOYS; EQUATION; STATE; PREDICTION; CRYSTAL; SOLIDS; SE SO - Physica B-Condensed Matter 2003 ;334(3-4):436-442 7523 UI - 8861 AU - Brostow W AU - Castano VM AU - Clarson SJ AU - Cunha AM AU - Hess M AU - Schubert DW AD - Univ N Texas, Dept Mat Sci, LAPOM, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, CFATA, Queretaro 76000, MexicoUniv Cincinnati, Cincinnati, OH 45221, USAUniv Minho, Dept Engn Polimeros, P-4800 Guimaraes, PortugalUniv Duisburg, FB6 Phys Chem, D-47048 Duisburg, GermanyFreudenberg Forsch Dienste KG, App Phys, D-69465 Weinheim, GermanyBrostow, W, Univ N Texas, Dept Mat Sci, LAPOM, POB 305310, Denton, TX 76203 USA TI - POLYCHAR-10 World Forum on Polymer Applications & Theory in 2002 AB - A report from POLYCHAR-10 is provided. An introduction to the following papers presented at the POLYCHAR-10 Forum is given. A small selection of the authors and titles of the papers presented is listed. Prizes awarded are listed along with the composition of the Prize Committee. Some research groups of high activity which are represented at POLYCHAR every year are named MH - USA MH - Germany MH - Mexico|Queretaro MH - Portugal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Editorial Material AV - English IS - 1432-8917 UR - ISI:000181807100001 L2 - polymer research;polymer applications;polymer theory;polymer computer simulations;MICROPOROUS POLYETHYLENE FILMS; CELLULOSE FIBERS; ADSORPTION; SPECTROSCOPY; COMPOSITE SO - Materials Research Innovations 2003 ;7(1):1-3 7524 UI - 8237 AU - Broughton WJ AU - Hernandez G AU - Blair M AU - Beebe S AU - Gepts P AU - Vanderleyden J AD - Univ Geneva, LBMPS, CH-1292 Geneva, SwitzerlandUNAM, CIFN, Cuernavaca, Morelos, MexicoCIAT, Cali, ColombiaUniv Calif Davis, Davis, CA 95616, USAKatholieke Univ, CMPG, Heverlee, BelgiumBroughton, WJ, Univ Geneva, LBMPS, 1 Ch Imperatrice, CH-1292 Geneva, Switzerland TI - Beans (Phaseolus spp.) - model food legumes AB - Globally, 800 million people are malnourished. Heavily subsidised farmers in rich countries produce sufficient surplus food to feed the hungry, but not at a price the poor can afford. Even donating the rich world's surplus to the poor would not solve the problem. Most poor people earn their living from agriculture, so a deluge of free food would destroy their livelihoods. Thus, the only answer to world hunger is to safeguard and improve the productivity of farmers in poor countries. Diets of subsistence level farmers in Africa and Latin America often contain sufficient carbohydrates ( through cassava, corn/maize, rice, wheat, etc.), but are poor in proteins. Dietary proteins can take the form of scarce animal products ( eggs, milk, meat, etc.), but are usually derived from legumes ( plants of the bean and pea family). Legumes are vital in agriculture as they form associations with bacteria that 'fix-nitrogen' from the air. Effectively this amounts to internal fertilisation and is the main reason that legumes are richer in proteins than all other plants. Thousands of legume species exist but more common beans ( Phaseolus vulgaris L.) are eaten than any other. In some countries such as Mexico and Brazil, beans are the primary source of protein in human diets. As half the grain legumes consumed worldwide are common beans, they represent the species of choice for the study of grain legume nutrition. Unfortunately, the yields of common beans are low even by the standards of legumes, and the quality of their seed proteins is sub-optimal. Most probably this results from millennia of selection for stable rather than high yield, and as such, is a problem that can be redressed by modern genetic techniques. We have formed an international consortium called 'Phaseomics' to establish the necessary framework of knowledge and materials that will result in disease-resistant, stress-tolerant, high-quality protein and high-yielding beans. Phaseomics will be instrumental in improving living conditions in deprived regions of Africa and the Americas. It will contribute to social equity and sustainable development and enhance inter- and intra-cultural understanding, knowledge and relationships. A major goal of Phaseomics is to generate new common bean varieties that are not only suitable for but also desired by the local farmer and consumer communities. Therefore, the socio-economic dimension of improved bean production and the analysis of factors influencing the acceptance of novel varieties will be an integral part of the proposed research ( see Figure 1). Here, we give an overview of the economic and nutritional importance of common beans as a food crop. Priorities and targets of current breeding programmes are outlined, along with ongoing efforts in genomics. Recommendations for an international coordinated effort to join knowledge, facilities and expertise in a variety of scientific undertakings that will contribute to the overall goal of better beans are given. To be rapid and effective, plant breeding programmes (i.e., those that involve crossing two different 'parents') rely heavily on molecular 'markers'. These genetic landmarks are used to position important genes ( e. g. for resistance to particular pests, for yield, etc.) on a chromosome and ensure that they can be 'crossed in' to another plant. There are several ways of obtaining molecular markers but the project will establish partial sequences of messenger RNA's extracted from tissues of interest ( e. g. developing pods). These so-called expressed sequence-tags ( ESTs), can be used like milestones on a chromosome, to position these and othe These efforts will complement current studies on other legumes such as Lotus japonicus and Medicago truncatula as well as the EST projects in soybean by providing a framework for comparative genomics between legumes. Complete sequencing and molecular analysis of the bean genome will follow. Individual laboratories will be encouraged to internally finance or find additional funding for the construction of cDNA libraries and the sequencing of thousands ESTs. Funds donated to the consortium will be used primarily for sequencing the genome and to co-ordinate the consortium's activities. As sequence and expression data become available it will provide an elaborate framework for plant geneticists to 'design' new, improved common bean lines. Amongst these lines will be higher-yielding varieties, cultivars that are resistant to drought, pests and so on. It will also be possible to enhance the content of essential amino acids, minerals and vitamins in the seeds and so improve the nutrition and health of countless people who consume beans. By considering the socio-economic implications of common bean improvement from the outset, this project should lead to sustainable development, to increased social equity, and to greater use of beans in international trade. The added value in this innovative approach to common beans as model food legumes lies in the combination of existing and novel genetic approaches with socio-economic criteria that will efficiently target the end users MH - Belgium MH - Colombia MH - Mexico|Morelos MH - Switzerland MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 43 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Review AV - English IS - 0032-079X UR - ISI:000183439100005 L2 - expression analysis;expressed sequence tags;large-scale sequencing;molecular breeding;Phaseomics consortium;P. vulgaris;Rhizobium;ACETYL-COA CARBOXYLASE; GROWTH PROMOTING RHIZOBACTERIA; DIFFERENTIAL GENE-EXPRESSION; CHLOROPHYLL-A FLUORESCENCE; INTRACELLULAR FREE CALCIUM; PLANT NATRIURETIC PEPTIDE; MARKER-ASSISTED SELECTION; COMMON BACTERIAL-BLIGHT; INTEGRATED LINKAGE MAP; ROOT-HAIR DEFORMATION SO - Plant and Soil 2003 ;252(1):55-128 7525 UI - 6604 AU - Brudny VL AU - Mochan WL AU - Maytorena JA AU - Mendoza BS AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoCtr Invest Opt, Guanajuato 37000, MexicoBrudny, VL, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Ciudad Univ Pab 1, RA-1428 Buenos Aires, DF, Argentina TI - Second harmonic generation from a collection of nanoparticles AB - In this paper we discuss the SH radiation produced by a composite film made up of nanosized spherical centrosymmetric homogeneous particles. Although each individual sphere is unable to radiate in the forward direction when illuminated by a plane wave, our results show that for a thin composite film illuminated by a focused gaussian linearly polarized beam the radiation pattern presents two narrow lobes displaced along the polarization direction by a small angle of the order of the diffraction-induced angular divergence of the linear far field. The SH radiation produced by a non-homogeneous film, on the other hand presents non-trivial patterns which depend on the fundamental frequency, the waist of the illuminating beam, the sharpness of the edge, the density profile and both the incoming and outgoing polarizations. We hope that these results can be extended to develop characterization techniques for composite films based on surface SHG or SFG. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Argentina MH - Mexico|Guanajuato MH - Mexico|Morelos PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000187566600009 L2 - ELECTROMAGNETIC RESPONSE; SILICON NANOCRYSTALS; SPATIAL FLUCTUATIONS; HARMONIC-GENERATION; SPHERICAL-PARTICLES; METAL-SURFACES; SCATTERING; SEMICONDUCTOR; SPECTROSCOPY; REFLECTION SO - Physica Status Solidi B-Basic Research 2003 ;240(3):518-526 7526 UI - 6554 AU - Brule T AU - Deniel C AU - Colas-Marrufo T AU - Renan X AD - CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoUBO, Inst Univ Europeen Mer, F-29280 Plouzane, FranceBrule, T, CINVESTAV, Unidad Merida, Antigua Carretera Progreso Km 6,AP 73, Merida 97310, Yucatan, Mexico TI - Reproductive biology of gag in the southern Gulf of Mexico AB - Aspects of the reproductive biology of gag Myeteroperca microlepis in the southern Gulf of Mexico were studied by following seasonal variations in the gonado-somatic index and through histological examination of gonads. Gag were collected from inshore and offshore waters of the Campeche Bank, Yucatan, Mexico, between April 1996 and December 2001. This species is a protogynous hermaphrodite, and appeared to be depth-size distributed. The smallest gag (9-49cm, L-F) collected were all juvenile females, and were caught in inshore waters (1-10m depth), while the largest (49-116cm L-F), mainly adult females, males and transitionals, were captured in offshore waters (33-167m depth). Overall the offshore male to female ratio was female-biased (1 : 3(.)3) and differed significantly from unity. The species spawns at depths of c. 50-53 m, from early winter to mid-spring, with peak spawning activity occurring between January and March. Fifty per cent of females reached first maturity at 72(.)1 cm L-F. At 103 cm L-F, 50% of sampled females had changed into males. Gag can be considered a monandric species, and sexual transition for this grouper seemed to occur in fish distributed within a narrow size range (85-111 cm L-F). The results are compared with those of other authors for gag stocks from the south-east Atlantic coast of the U.S.A. and the north-east Gulf of Mexico. (C) 2003 The Fisheries Society of the British Isles MH - France MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-1112 UR - ISI:000187794400009 L2 - first maturity;Mycteroperca microlcpis;sex change;southern Gulf of Mexico;spawning season;MYCTEROPERCA-MICROLEPIS SERRANIDAE; SOUTHEASTERN UNITED-STATES; PROTOGYNOUS GROUPER; LIFE-HISTORY; EASTERN GULF; SEX-RATIO; PISCES; GROWTH; AGE; INDEX SO - Journal of Fish Biology 2003 ;63(6):1505-1520 7527 UI - 7830 AU - Brule T AU - Renan X AU - Colas-Marrufo T AU - Hauyon Y AU - Tuz-Sulub AN AU - Deniel C AD - Univ Bretagne Occidentale, Inst Europeen Mer, F-29820 Plouzane, FranceCtr Invest & Estudios Avanzados, IPN, Unidad Merida, Merida 97310, Yucatan, MexicoBrule, T, Ctr Invest & Estudios Avanzados, IPN, Unidad Merida, Antigua Carretera Progreso Km 6,Apartado Postal 7, Merida 97310, Yucatan, Mexico TI - Reproduction in the protogynous black grouper (Mycteroperca bonaci (Poey)) from the southern Gulf of Mexico AB - An analysis was made of sexual pattern, spawning season, sizes at sexual maturation, and sex change in black grouper (Mycteroperca bonaci) from the southern Gulf of Mexico. Samples were taken between 1996 and 2000, from industrial and small-craft commercial fisheries, in offshore and inshore waters of the continental shelf of the Yucatan Peninsula (Campeche Bank), including the shallow waters of National Marine Park Alacranes Reef For all collected specimens (n=1229), sex and maturation condition were determined by histological analysis of the gonads. The offshore sample consisted of 75.1% females, 24.3% males, and 0.6% transitional-stage fish. All individuals collected from inshore waters were females. Gonadal structure and population structure characteristics for Campeche Bank black grouper were consistent with the characteristics of monandric protogynous hermaphrodism for a serranid fish. Sexually active males and females were observed year-round, although ripening females, with stage-III, -IV, and -V vitellogenic oocytes in the ovaries, dominated in samples taken between December and March. In addition, peak occurrence of ripe-running females with hyaline oocytes or postovulatory follicles (or both) in the ovaries was recorded in January and February. A few precocious females began spawning in October and November, and others were still in spawning condition in May and June. Fifty percent maturity of females was attained at 72.1 cm fork length (FL). Median size at sexual inversion was 103.3 cm FL, and 50% of the females measuring 111.4 cm FL had transformed into males. The southern Gulf of Mexico grouper fishery was considered deteriorated and lacked a well-defined management strategy. Results of the present study provide helpful information on black grouper reproduction in this area and could help Mexican authorities choose appropriate management strategies for this fishery, such as minimum size limit, closed fishing season, and protection of spawning aggregations MH - France MH - Mexico|Yucatan PB - SEATTLE: NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 0090-0656 UR - ISI:000184532200001 L2 - SPAWNING AGGREGATION; SNAPPER; FISHES; PISCES SO - Fishery Bulletin 2003 ;101(3):463-475 7528 UI - 8247 AU - Brundtland GH AU - Frenk J AU - Murray CJL AD - WHO, CH-1211 Geneva 27, SwitzerlandMinist Hlth Mexico, Mexico City, DF, MexicoBrundtland, GH, WHO, CH-1211 Geneva 27, Switzerland TI - WHO assessment of health systems performance MH - Mexico|Distrito Federal MH - Switzerland PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 1 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0140-6736 UR - ISI:000183654200027 SO - Lancet 2003 ;361(9375):2155-2155 7529 UI - 7364 AU - Brunt CM AU - Heyer MH AU - Vazquez-Semadeni E AU - Pichardo B AD - Dominion Radio Astrophys Observ, Herzberg Inst Astrophys, Natl Res Council, Penticton, BC V2A 6K3, CanadaUniv Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, CanadaUniv Massachusetts, Five Coll Radio Astron Observ, Amherst, MA 01003, USAUniv Massachusetts, Dept Astron, Amherst, MA 01003, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoBrunt, CM, Dominion Radio Astrophys Observ, Herzberg Inst Astrophys, Natl Res Council, POB 248, Penticton, BC V2A 6K3, Canada TI - Intrinsic, observed, and retrieved properties of interstellar turbulence AB - We generate synthetic observations of three-dimensional, self-gravitating MHD simulations of the interstellar medium ( ISM) to evaluate the ability of principal component analysis (PCA) to measure the scale dependence of turbulent velocity fluctuations in molecular clouds. Scaling exponents, alpha, observationally obtained from the coupled characteristic scales for line pro. le variability in velocity, deltav, and in space, L, where deltav proportional to L-alpha, are compared with the intrinsic scaling exponents of the MHD velocity fields. We determine the approximate structure function order at which PCA operates in order to then verify a previously established calibration of the PCA method. We also analyze the statistical properties of projected velocity line centroid fields, including effects of intermittent velocity fluctuations, density inhomogeneity, and opacity, and examine the relationship of the projected two-dimensional statistics to the intrinsic three-dimensional statistics. Using PCA, we infer steep three-dimensional energy spectra in the molecular ISM, generally steeper than can be accounted for by Kolmogorov turbulence or possibly even shock-dominated turbulence MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185675800021 L2 - ISM : clouds;ISM : kinematics and dynamics;methods : statistical;MHD;radio lines : ISM;turbulence;SPECTRAL CORRELATION-FUNCTION; MOLECULAR CLOUD COMPLEXES; H-II REGIONS; SUPERSONIC TURBULENCE; VELOCITY STRUCTURE; RADIATIVE-TRANSFER; OUTER GALAXY; MODELS; SIMULATIONS; STATISTICS SO - Astrophysical Journal 2003 ;595(2):824-841 7530 UI - 9362 AU - Brutsaert TD AU - Hernandez-Cordero S AU - Rivera J AU - Viola T AU - Hughes G AU - Haas JD AD - SUNY Albany, Dept Anthropol, Albany, NY 12222, USACornell Univ, Div Nutr Sci, Ithaca, NY 14853, USANatl Publ Hlth Inst, Dept Nutr, Cuernavaca, Morelos, MexicoBrutsaert, TD, SUNY Albany, Dept Anthropol, 1400 Washington Ave, Albany, NY 12222 USA TI - Iron supplementation improves progressive fatigue resistance during dynamic knee extensor exercise in iron-depleted, nonanemic women AB - Background: Tissue iron depletion may negatively affect endurance performance and muscle fatigability. Objective: We investigated tissue-level iron depletion and progressive fatigue of the quadriceps during dynamic knee-extension exercise in young women. Design: Twenty iron-depleted (serum ferritin < 20 mug/L), nonanemic (hemoglobin > 110 g/L) women ((x) over bar +/- SEM age: 29.1 +/- 1.2 y) received iron (iron group) or placebo (placebo group) for 6 wk in a randomized, double-blind trial (n = 10 per group). A protocol integrating 2-3-s maximal voluntary static contractions (MVCs) with dynamic knee extensions was used to assess fatigue. Results: No significant differences between the groups in baseline iron status, MVC at rest, or MVC at the end of the protocol were observed. After treatment, serum iron and transferrin saturation increased significantly in the iron group (P = 0.02 and P = 0.03, respectively). Serum transferrin receptor concentrations increased significantly in the placebo group (P < 0.01) but not in the iron group. After treatment, the rate of decrease in MVC was attenuated in the iron group but not in the placebo group (P = 0.01). In the iron group, MVC at the sixth minute of the fatigue protocol and MVC at the end of the protocol were approximate to15% (P = 0.04) and approximate to27% higher (P < 0.01), respectively, after treatment. These improvements were not related to changes in iron-status indexes or tissue iron stores, although power was low (< 0.50) to detect these relations. Conclusions: Iron supplementation was associated with a significant improvement in muscle fatigability. Interpretation regarding the direct role of tissue iron status is limited by the study's low power to detect relations between tissue iron improvement and decreased muscle fatigue MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 19 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000180512200025 L2 - quadriceps femoris;leg kick;iron deficiency;endurance;oxidative capacity;mitochondrial respiration;Mexican women;SERUM TRANSFERRIN RECEPTOR; ALTERED METABOLIC RESPONSE; PHYSICAL WORK CAPACITY; MUSCLE FATIGUE; SKELETAL-MUSCLE; DEFICIENT RATS; BLOOD LACTATE; LEG EXERCISE; PERFORMANCE; ENDURANCE SO - American Journal of Clinical Nutrition 2003 ;77(2):441-448 7531 UI - 8627 AU - Buch L AU - Groenzin H AU - Buenrostro-Gonzalez E AU - Andersen SI AU - Lira-Galeana C AU - Mullins OC AD - Schlumberger Doll Res Ctr, Ridgefield, CT 06877, USATech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkInst Mexicano Petr, Mol Engn Res Program, Mexico City 07730, DF, MexicoMullins, OC, Schlumberger Doll Res Ctr, Old Quarry Rd, Ridgefield, CT 06877 USA TI - Molecular size of asphaltene fractions obtained from residuum hydrotreatment AB - Previously, fluorescence depolarization techniques (FD) have been shown to measure asphaltene molecular size, thereby establishing the substantial difference between asphaltenes derived from crude oil vs from coal. Here, FD is used to track the changes of the asphaltenes from a petroleum atmospheric resid feedstock that has been subjected to increasing thermal severity of catalytic hydrothermal cracking. Changes in asphaltene properties with increasing cracking are readily observed and understood. In addition, asphaltene molecular size is measured for various asphaltene solubility fractions in binary solvent mixtures of toluene with either n-heptane or acetone; a strong dependence is found of asphaltene properties on the particular solvent mixtures in accord with recent publications. (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Denmark MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 18 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0016-2361 UR - ISI:000182464700007 L2 - asphaltene fraction;fluorescence depolarization;asphaltene molecular size and weight;asphaltene subfractions;asphaltene solubility fractions;catalytic hydrothermal treatment;N-HEPTANE ASPHALTENES; PRECIPITATION TEMPERATURE; PETROLEUM ASPHALTENES; CRUDE OILS; STABILITY; INDEX SO - Fuel 2003 ;82(9):1075-1084 7532 UI - 8139 AU - Buchy MC AU - Frey E AU - Stinnesbeck W AU - Lopez-Oliva JG AD - Univ Karlsruhe, Geol Inst, D-76128 Karlsruhe, GermanyUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares, MexicoBuchy, MC, Staatl Museum Nat Kunde, Geowissenschaftliche Abt, Erbprinzenstr 13, D-76133 Karlsruhe, Germany TI - First occurrence of a gigantic pliosaurid plesiosaur in the late Jurassic (Kimmeridgian) of Mexico AB - Reinvestigation of a partial vertebral column from the Kimmeridgian La Caja Formation of Mexico, housed in the University of Linares (Mexico), and previously attributed to a dinosaur, proves to be from a very large pliosaurid plesiosaur. This specimen represents the first plesiosaur described from the Jurassic of Mexico. Its length has been estimated at 15 metres and, as a juvenile, is considered to be one of the largest Jurassic marine reptiles. The remains of this animal are here described. The morphology of the vertebral column is not diagnostic beyond family level. Large pliosaur vertebrae of a similar size are known from the Upper Jurassic of Europe, and are often referred to the genera Liopleurodon or Simolestes but these identifications are based only upon the size of the centra and have no taxonomic justification. A portion of rostrum with teeth was discovered together with the vertebral column but is unfortunately now lost. The Mexican pliosaur fills geographical and chronological gaps between western Tethys and South American pliosaurs, and is an additional support to the hypothesis of a Hispanic corridor linking at least temporarily the NW European marine province with the western South American marine (Pacific) realm during the late Jurassic MH - Germany MH - Mexico|Nuevo Leon PB - PARIS: SOC GEOL FRANCE RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0037-9409 UR - ISI:000183818700007 L2 - Kimmeridgian;Pliosauridae;Mexico;palaeobiogeography;NEUQUEN BASIN; CROCODYLIFORMES; THALATTOSUCHIA; ARGENTINA; REPTILES SO - Bulletin de la Societe Geologique de France 2003 ;174(3):271-278 7533 UI - 7687 AU - Bucior K AU - Patrykiejew A AU - Sokolowski S AU - Pizio O AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUNAM, Inst Quim, Mexico City, DF, MexicoBucior, K, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Liquid-liquid interface in a binary mixture of associating fluids exhibiting a closed-loop immiscibility AB - We investigate the structure and thermodynamic properties of the liquid-liquid interface for a two-component mixture of associating fluids, exhibiting the closed-loop liquid-liquid immiscibility. In the study we apply the density functional approach and evaluate the density profiles, the ratio of unbound particles and the surface tension in order to investigate how those properties depend on the association energy MH - Mexico|Distrito Federal MH - Poland PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000184808400010 L2 - BORN-GREEN-YVON; DIRECTIONAL ATTRACTIVE FORCES; DENSITY-FUNCTIONAL THEORY; PHASE-EQUILIBRIA; EQUATION; BEHAVIOR; TRANSITIONS; MOLECULES; PROFILES; MODEL SO - Molecular Physics 2003 ;101(14):2233-2240 7534 UI - 7904 AU - Bucior K AU - Patrykiejew A AU - Pizio O AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoSokolowski, S, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Wetting behaviour of a model symmetric binary mixture with partially miscible components from a density functional approach AB - We investigate wetting transitions in a binary fluid at a solid surface by means of a density functional approach. For this purpose we use the symmetric binary mixture model, which exhibits a demixing in a bulk phase. We concentrate on the evaluation of the phase diagrams in the case of adsorption from a gas phase at a fixed composition. Our calculations have revealed different scenarios, leading to the change of wettability of the surface. In the case of adsorption from an equimolar bulk gas the wetting transition may be of the first or of the second order. In the case of non-equimolar bulk composition we observe either a transition from partial to complete wetting, or a first-order transition between two partial wetting states MH - Mexico|Distrito Federal MH - Poland PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000184142300008 L2 - LENNARD-JONES MIXTURES; GREEN-YVON EQUATION; SLIT-SHAPED PORES; LIQUID-LIQUID; FLUID MIXTURE; MONTE-CARLO; PHASE-TRANSITIONS; ADSORPTION; INTERFACE; SIMULATION SO - Molecular Physics 2003 ;101(10):1477-1486 7535 UI - 8788 AU - Bucior K AU - Patrykiejew A AU - Pizio O AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modeling Physicochem Proc, PL-20031 Lublin, PolandUNAM, Inst Chem, Mexico City, DF, MexicoBucior, K, Marie Curie Sklodowska Univ, Dept Modeling Physicochem Proc, PL-20031 Lublin, Poland TI - Capillary condensation of a binary mixture in slit-like pores AB - We investigate the capillary condensation of two model fluid mixtures in slit-like pores, which exhibit different demixing properties in the bulk phase. The interactions between adsorbate particles are modeled by using Lennard-Jones (12, 6) potentials and the adsorbing potentials are of the Lennard-Jones (9, 3) type. The calculations are performed for different pore widths and at different concentrations of the bulk gas, by means of density functional theory. We evaluate the capillary phase diagrams and discuss their dependence on the parameters of the model. Our calculations indicate that a binary mixture confined to a slit-like pore may exhibit rich phase behavior. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000182019800001 L2 - DENSITY-FUNCTIONAL THEORY; LIQUID-LIQUID INTERFACE; LENNARD-JONES MIXTURES; PHASE-TRANSITIONS; FLUID MIXTURE; SHAPED PORES; ADSORPTION; SIMULATION; BEHAVIOR; METHANE SO - Journal of Colloid and Interface Science 2003 ;259(2):209-222 7536 UI - 8817 AU - Bucior K AU - Patrykiejew A AU - Pizio O AU - Sokolowski S AU - Sokolowska Z AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUNAM, Inst Chem, Mexico City, DF, MexicoPolish Acad Sci, Inst Agrophys, PL-20346 Lublin, PolandBucior, K, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Demixing of a binary mixture in slit-like pores at high temperatures AB - We investigate the fluid-fluid demixing transitions in the case of adsorption of so-called symmetric binary mixtures in slit-like pores at temperatures higher than the bulk gas-liquid critical temperature. The aim of the study is to determine how the demixing of such mixtures in the pores depends on the bulk phase composition and on the parameters characterizing the pore. The calculations have been carried out by means of a density functional theory. In the case of an equimolar bulk mixture, the demixing transition inside the pore occurs only when the adsorption potentials of both species are identical. The occurrence of this transition is manifested by a cusp in the adsorption isotherm. For nonequimolar bulk phase compositions, the transition can also take place if the adsorption energies of both components are different. However, the difference in the adsorption energies should be small enough, otherwise a continuous demixing takes place. For non-equimolar compositions two branches of the grand canonical potential intersect, whereas for equimolar bulk composition they meet tangentially. We have determined phase behaviour for several model systems MH - Mexico|Distrito Federal MH - Poland PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000181835900002 L2 - HARD-SPHERE FLUID; DENSITY-FUNCTIONAL THEORY; LENNARD-JONES MIXTURES; CANONICAL MONTE-CARLO; GREEN-YVON EQUATION; LIQUID-LIQUID; PHASE-TRANSITIONS; POROUS MATERIALS; SHAPED PORES; ADSORPTION SO - Molecular Physics 2003 ;101(6):721-731 7537 UI - 7398 AU - Buenabad-Chavez J AU - Muller HL AU - Stallard PWA AU - Warren DHD AD - CINVESTAV, Secc Computac, Mexico City 07360, DF, MexicoUniv Bristol, Dept Comp Sci, Bristol BS8 1UB, Avon, EnglandBuenabad-Chavez, J, CINVESTAV, Secc Computac, Ap Postal 14-740, Mexico City 07360, DF, Mexico TI - Virtual memory on data diffusion architectures AB - Data diffusion architectures (also known as cache only memory architectures) provide a shared address space on top of distributed memory. Their distinctive feature is that data diffuses, or migrates and replicates, in main memory according to whichever processors are using the data. This requires an associative organisation of main memory, which decouples each address and its data item from any physical location. A data item can thus be placed and replicated where it is needed. Also, the physical address space does not have to be fixed and contiguous. It can be any set of addresses within the address range of the processors, possibly varying over time, provided it is smaller than the size of main memory. This flexibility is similar to that of a virtual address space, and offers new possibilities to organise a virtual memory system. We present an analysis of possible organisations of virtual memory on such architectures, and propose two main alternatives: traditional virtual memory (TVM) is organised around a fixed and contiguous physical address space using a traditional mapping; associative memory virtual memory (AMVM) is organised around a variable and non-contiguous physical address space using a simpler mapping. To evaluate TVM and AMVM, we extended a multiprocessor emulation of a data diffusion architecture to include part of the Mach operating system virtual memory. This extension implements TVM; a slightly modified version implements AMVM. On applications tested, AMNM shows a marginal performance gain over TVM. We argue that AMVM will offer greater advantages with higher degrees of parallelism or larger data sets. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0167-8191 UR - ISI:000185414600002 L2 - Cache Only Memory Architectures (COMA);virtual memory;scalable shared memory multiprocessors;data diffusion architectures;STORAGE; SYSTEM SO - Parallel Computing 2003 ;29(8):1021-1052 7538 UI - 5804 AU - Bueno-Soria J AU - Holzenthal RW AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Minnesota, Dept Entomol, St Paul, MN 55108, USABueno-Soria, J, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Apdo Postal 70-153, Mexico City 04510, DF, Mexico TI - New species and records of the microcaddisfly genus Metrichia ross from Costa Rica (Trichoptera : Hydroptilidae) AB - Twenty new species of Metrichia (Trichoptera: Hydroptilidae) from Costa Rica are described: M. acicula, M. alajuela, M. amplitudinis, M. ancora, M. angulosa, M. decora, M. gordita, M. luna, M. magna, M. mechuda, M. meta, M. picuda, M. prolata, M. pseudopatagonica, M. savegra, M. separata, M. sesquipedalis, M. spica, M. triquetra, and M. truncata. Records of six previously described species occurring in Costa Rica are provided: M. avon (Bueno-Soria), M. biungulata (Flint), M. lemniscata (Flint), M. penicillata (Flint), M. quadrata (Flint), and M. riva (Bueno-Soria). An illustrated key is provided for males of all species occurring in Costa Rica, Nicaragua and Panama. A new species group, the M. patagonica group, is proposed MH - Mexico|Distrito Federal MH - USA PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0165-0521 UR - ISI:000220567500004 L2 - trichoptera;hydroptilidae;Metrichia;Costa Rica;taxonomy;key;new species SO - Studies on Neotropical Fauna and Environment 2003 ;38(3):173-197 7539 UI - 9360 AU - Bulit C AU - az-Avalos C AU - Signoret M AU - Montagnes DJS AD - Univ Autonoma Metropolitana Xochimilco, Dept El Hombre & Ambiente, Mexico City 04960, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv Liverpool, Port Erin Marine Lab, Sch Biol Sci, Port Erin IM9 6JA, Man, EnglandBulit, C, Univ Autonoma Metropolitana Xochimilco, Dept El Hombre & Ambiente, Calzada Hueso 1100, Mexico City 04960, DF, Mexico TI - Spatial structure of planktonic ciliate patches in a tropical coastal lagoon: an application of geostatistical methods AB - The distribution of ciliates in a Mexican coastal lagoon was studied. The 4 goals were to: examine small-scale (< 100 m) patches; indicate how geostatistical techniques can be used to examine these patches; make inferences concerning ciliate distribution and behaviour in the lagoon using geostatistical techniques; and assess geostatistics as a method for modelling ciliate distributions. Underlying these goals we attempt to make geostatistical techniques accessible to the non-expert. We provide an overview of the methodology, references to the geostatistical literature, and use our system as an example. Ciliates were sampled in a 40 x 40 m grid, divided at 10 m intervals; the grid was further divided into subsets, to determine 1 to 10 m scale variation. Between 30 and 35 points were sampled on 2 occasions (January and October). Ciliates were preserved with Lugol's iodine; abundance and species composition were determined by standard inverted microscopy. The work focused on 4 abundant ciliate species. We indicate, using the variographic analysis, that the abundance of 3 of the 4 ciliates is neither randomly nor homogeneously distributed, but exhibits a structured small-scale patchy distribution. We indicate that species-specific patterns of patchiness exist in stratified and in mixed waters, supporting the notion of behavioural niche-separation of planktonic ciliates. Patches of < 13, < 18, and <77 m were formed by Lohmaniella oviformis, Tintinnopsis sp. and Strombidium sp., respectively. In contrast, Pleuronema sp. formed patches below the detection limits of the analysis (< 1 m). Using geostatistical techniques, we established variograms and used them to model ciliate distribution and predict ciliate behaviour. Distribution maps were then generated that depicted the shape, distinctness, and gradient of the different patches. After analysing the data, we proposed a working definition of a 'ciliate patch': regions with abundance above the cut-off of the upper quartile from the kriging prediction model. Finally, error-maps were developed, indicating the coefficient of variation of the predicted distributions. We conclude that geostatistical analysis is a powerful tool to examine microzooplankton at small-scales, and we support its further application in the field MH - United Kingdom MH - Mexico|Distrito Federal PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Marine & Freshwater Biology;Microbiology U5 - J;Article AV - English IS - 0948-3055 UR - ISI:000180577900008 L2 - microzooplankton patchiness;variographic analysis;ordinary kriging;Tintinnopsis;Lohmaniella;Strombidium;Pleuronema;Mexico;SHELF NW SPAIN; AUTO-CORRELATION; FAVELLA SP; ECOLOGY; SEA; NANOPLANKTON; RESPONSES; CRUSTACEA; PATTERNS; BACTERIA SO - Aquatic Microbial Ecology 2003 ;30(2):185-196 7540 UI - 9441 AU - Bullock SH AD - CICESE, Dept Ecol, Ensenada 22800, Baja California, MexicoSan Diego State Univ, Dept Biol, San Diego, CA 92182, USABullock, SH, CICESE, Dept Ecol, Apdo Postal 2732, Ensenada 22800, Baja California, Mexico TI - Seasonality, spatial coherence and history of precipitation in a desert region of the Baja California peninsula AB - Precipitation patterns are characterized for an area of the Sonoran Desert in Baja California, with emphasis on temporal and spatial variability, based on nine stations between 30.03degrees and 28.58degrees, ca. 1953-1998. The interior stations formed a coherent region, while some distinct tendencies were shown for the Pacific and Gulf coasts. Precipitation was predominately in the cool season (61-91% in November-April), and was non-normal in both seasonal and annual totals, The duration of moist conditions was examined as the probability of some number of consecutive months above a threshold; for the cool season, the distributions approximated the Poisson with means dependent on the threshold. Spatial coherence was examined as the between-station correlation of inter-annual variation of seasonal totals. This also emphasized the cool-moist regime: the correlations of histories were all significant and exceeded 0.69 between interior stations, but most were weak or insignificant in the warm season. The full range of cool-season precipitation, showed a linear correlation with a seasonalized Southern Oscillation Index (-0.64) in the decades of record. Exceptionally, wet cool seasons were related to other proxy data; an historical reconstruction indicated very wet cool seasons were not evenly distributed in the last 150 years. (C) 2002 Elsevier Science Ltd MH - Mexico|Baja California MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000180172300003 L2 - climate history;seasonality;ENSO;Sonoran Desert;Baja California;MEXICO; RAINFALL; DROUGHT; GULF SO - Journal of Arid Environments 2003 ;53(2):169-182 7541 UI - 7967 AU - Burboa-Cabrera FR AU - Schacht WH AU - Anderson BE AD - CIRNO, SAGARPA, INIFAP, Hermosillo, Sonora, MexicoUniv Nebraska, Dept Agron & Hort, Lincoln, NE 68583, USABurboa-Cabrera, FR, CIRNO, SAGARPA, INIFAP, Blvd del Bosque,7 Col Valle Verde, Hermosillo, Sonora, Mexico TI - Utilization and grazing distribution of cattle at 4 stocking densities AB - The relationship between stocking density and grazing distribution was studied in eastern Nebraska pastures seeded to a warm-season, tall-grass mixture and grazed at 4 stocking densities: 9, 18, 27, and 54 steers ha(-1). Each of 4 pastures was divided into 4 paddocks ranging in size from 0.18 to 1.12 ha. Paddocks within each pasture were grazed rotationally by 10 steers averaging 282 kg during 3 consecutive cycles (12, 36, and 24 days) from early June to late August in 1995 and 1996. Transects 12-m long were established in a grid pattern in each paddock. Six tillers each of big bluestem (Andropogon gerardii Vitman) and switch-grass (Panicum virgatum L.) were marked permanently in each transect. Height and leaf length of marked tillers were measured before and after grazing in the last 2 grazing cycles in both years. Utilization was estimated by the reduction in tiller height or leaf length. Estimates of grazing distribution were based on a uniformity index, which was calculated by summing the absolute differences of tiller height or leaf length between adjacent transects. Stocking density generally did not affect (P > 0.05) tiller height reduction which ranged from 19 to 22 cm and from 29 to 38 cm among the stocking densities in 1995 and 1996, respectively. In most grazing cycles, leaf length reduction for big bluestem was greater (P < 0.05) than for switchgrass while tiller height reduction was similar between species. Spatial grazing distribution was not affected (P > 0.05) by stocking density but big bluestern was grazed more evenly (P < 0.05) than switchgrass in the last cycle in each year. Stocking densities as high as 54 steers ha(-1) on warmseason, tall-grass mixtures do not appear to be a major factor in affecting spatial grazing distribution or forage plant selection MH - Mexico|Sonora MH - USA PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 0022-409X UR - ISI:000184011400004 L2 - big bluestem;switchgrass;uniformity index;herbage allowance;TILLER DEFOLIATION PATTERNS; SHORT-DURATION; RANGE SO - Journal of Range Management 2003 ;56(4):328-333 7542 UI - 6979 AU - Burchard EG AU - Choudhry S AU - Ung N AU - Salari K AU - Ziv E AU - Nazario S AU - Casal J AU - Torres J AU - Rodriguez-Santana J AU - Sylvia JS AU - Salas J AU - Selman M AU - Chapela R AU - Boushey HA AU - Weiss ST AU - Ford J AU - Sheppard D AU - Rodriguez-Cintron W AU - Drazen JM AU - Silverman EK AD - Univ Calif San Francisco, San Francisco, CA 94143, USAUniv Puerto Rico, San Juan, PR 00936, USACardiovasc Ctr Puerto Rico, Pediat Pulm Program, San Juan, PR, USABrigham & Womens Hosp, Boston, MA 02115, USAInst Nacl Enfermedades Respiratorias, Mexico City, DF, MexicoColumbia Univ, New York, NY 10027, USA TI - Pharmacogenetic association between beta 2AR haplotypes and lower bronchodilator responsiveness in Puerto Rican than in Mexican asthmatic subjects from the Genetics of Asthma in Latino Americans (GALA) Study MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701243 SO - American Journal of Human Genetics 2003 ;73(5):383-383 7543 UI - 7804 AU - Burenkov VI AU - Almeida GEG AD - Cardiff Univ, Sch Math, Cardiff CF24 4YH, S Glam, WalesUniv Autonoma Yucatan, Fac Matemat, Merida, Yucatan, MexicoBurenkov, VI, Cardiff Univ, Sch Math, POB 926, Cardiff CF24 4YH, S Glam, Wales TI - Equivalent quasinorms for the anisotropic Nikol'skii-Besov spaces on a cone of functions with a regular Fourier transform AB - We prove the equivalence of the quasinorms of the anisotropic Nikol'skii-Besov spaces to simpler quasinorms on a cone of functions with positive Fourier transforms satisfying some regularity conditions MH - Mexico|Yucatan MH - United Kingdom PB - ZAGREB: ELEMENT RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1331-4343 UR - ISI:000184398500013 L2 - anisotropic function spaces;fractional smoothness;Nikol'skii-Besov SO - Mathematical Inequalities & Applications 2003 ;6(3):497-508 7544 UI - 7604 AU - Burger J AU - az-Barriga F AU - Marafante E AU - Pounds J AU - Robson M AD - Rutgers State Univ, Div Life Sci, Nelson Biol Labs, Piscataway, NJ 08854, USAUniv Autonoma San Lius Potosi, Fac Med, San Luis Potosi, MexicoEuropean Commiss, Inst Environm, Joint Res Ctr, I-21020 Ispra, Varese, ItalyPacific NW Natl Lab, Richland, WA 99352, USAUniv Med & Dent New Jersey, Sch Publ Hlth, Piscataway, NJ 08854, USABurger, J, Rutgers State Univ, Div Life Sci, Nelson Biol Labs, 604 Allison Rd, Piscataway, NJ 08854 USA TI - Methodologies to examine the importance of host factors in bioavailability of metals AB - Bioavailability provides a link between intrinsic toxicity and the ability to produce that toxic effect in an organism. Biomonitoring tools are essential to assess the health of ecosystems and their component parts, including humans. While field and laboratory data are available, two critical issues to our understanding of bioavailability are often missing: 1) knowing the relationship between dose and tissue concentrations, and 2) species extrapolations. Understanding of high to low dose extrapolation is also critical. Methods to understand the importance of host factors in bioavailability of metals must assess gender, age, nutritional status, individual variability, temporal changes, and critical habitat effects. Methods to examine these variables include correlational, observational, experimental, epidemiological, and modeling studies, or a combination of these. Data gaps include developing more representative studies of human and animal populations, better analytical tools for rapid determination of metal content in the field, improved analytical characterization of metal bioavailability, and concurrent studies of different metals. (C) 2003 Elsevier Inc. All rights reserved MH - Italy MH - Mexico|San Luis Potosi MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0147-6513 UR - ISI:000184979100004 L2 - biomonitoring;bioavailability;metals;host;ecological receptors;BLOOD LEAD LEVELS; DIETARY CALCIUM; MERCURY LEVELS; EXPOSURE; CADMIUM; WOMEN; PREGNANCY; FISH; FIELD; BIRDS SO - Ecotoxicology and Environmental Safety 2003 ;56(1):20-31 7545 UI - 7979 AU - Bursik M AU - Martinez-Hackert B AU - Delgado H AU - Gonzalez-Huesca A AD - SUNY Buffalo, Dept Geol, Buffalo, NY 14260, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoBursik, M, SUNY Buffalo, Dept Geol, Buffalo, NY 14260, USA TI - A smoothed-particle hydrodynamic automaton of landform degradation by overland flow AB - A novel model for calculating hillslope degradation by overland flow is based on a coupling of the cellular automaton and smoothed-particle hydrodynamics theories. Simulated debris-laden floods were initiated on digital elevation models (DEMs). The flows were created by solving equations for diffusion routing, and erosion and deposition. We separated advection and diffusion terms using operator splitting, then solved the advection term via automaton and the diffusion term via smoothed-particle hydrodynamics. The technique was tested on geometrically simple synthetic slopes, against data for erosion and deposition by debris-laden flows in a gully developing on a scoria cone (Arizona), and against data on a recent moderate-sized debris-laden flood generated by possible partial glacier melting at Popocatepetl volcano (Mexico). The flow and erosion/deposition patterns on the simple synthetic slopes appear intuitively reasonable. On the synthetic scoria-cone slope, the model reproduced some of the observed spatial patterns of event-scale erosion and deposition. Reasonable flow speeds, runup heights, and runout lengths were produced for the debris-laden flood at Popocatepetl. The coupled cellular automaton-smoothed-particle hydrodynamics technique represents some advance in the modeling of landform degradation and channel development by cellular automata (CA). Use of the technique may aid our understanding of the link between hillslope-scale and landform-scale degradation patterns. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000184026200003 L2 - landform degradation;channel development;overland flow;debris flow;simulation;smoothed-particle hydrodynamics;cellular;automaton;Popocatepetl;San Francisco Volcanic Field;Arizona;Mexico;DEBRIS FLOWS; INITIATION; ERUPTION; LAHARS; SNOW SO - Geomorphology 2003 ;53(1-2):25-44 7546 UI - 7852 AU - Bustos B AU - Navarro G AU - Chavez E AD - Univ Konstanz, Dept Comp & Informat Sci, D-78457 Constance, GermanyUniv Chile, Ctr Web Res, Dept Comp Sci, Santiago, ChileUniv Michoacana, Escuela Ciencias Fis Matemat, Morelia, Michoacan, MexicoBustos, B, Univ Konstanz, Dept Comp & Informat Sci, Univ Str 10,Box D 78, D-78457 Constance, Germany TI - Pivot selection techniques for proximity searching in metric spaces AB - With few exceptions, proximity search algorithms in metric spaces based on the use of pivots select them at random among the objects of the metric space. However, it is well known that the way in which the pivots are selected can drastically affect the performance of the algorithm. Between two sets of pivots of the same size, better chosen pivots can largely reduce the search time. Alternatively, a better chosen small set of pivots (requiring much less space) can yield the same efficiency as a larger, randomly chosen, set. We propose an efficiency measure to compare two pivot sets, combined with an optimization technique that allows us to select good sets of pivots. We obtain abundant empirical evidence showing that our technique is effective, and it is the first that we are aware of in producing consistently good results in a wide variety of cases and in being based on a formal theory. We show that good pivots are outliers, but that selecting outliers does not ensure that good pivots are selected. (C) 2003 Elsevier B.V. All rights reserved MH - Chile MH - Germany MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0167-8655 UR - ISI:000184293100016 L2 - metric databases;range queries;pivot-based indexing;nearest neighbor search SO - Pattern Recognition Letters 2003 ;24(14):2357-2366 7547 UI - 9644 AU - Bustos G AU - Ramirez JA AU - Garrote G AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, UAM Mante, Dept Food Engn, Tamaulipas 89840, MexicoUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoUniv Vigo, Fac Sci, Dept Chem Engn, Orense 32002, SpainUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Campus Lugo, Lugo 27002, Spain TI - Modeling of the hydrolysis of sugar cane bagasse with hydrochloric acid AB - Sugar cane bagasse was hydrolyzed under different concentrations of hydrochloric acid (2-6%), reaction times (0-300 min), and temperatures (100-128degreesC). Sugars obtained (xylose, glucose, arabinose, and glucose) and degradation products (furfural and acetic acid) were determined. Based on the Saeman model and the two-fraction model, kinetic parameters for predicting these compounds in the hydrolysates were developed. The influence of temperature was studied using the Arrhenius equation. The optimal conditions selected were 128degreesC, 2% HCl, and 51.1 min. Using these conditions, 22.6 g xylose/L, 3.31 g arabinose/L, 3.77 g glucose/L, 3.59 g acetic acid/L, and 1.54 g furfural/L were obtained MH - Mexico|Tamaulipas MH - Spain PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0273-2289 UR - ISI:000179722700005 L2 - sugar cane;bagasse;xylose;modeling;acid hydrolysis;PINUS-PINASTER WOOD; HEMICELLULOSIC FRACTION; PICHIA-STIPITIS; KINETICS; AUTOHYDROLYSIS; PREHYDROLYSIS; POSTHYDROLYSIS; FERMENTATION; XYLAN SO - Applied Biochemistry and Biotechnology 2003 ;104(1):51-68 7548 UI - 8020 AU - Bustos V AU - Unac RO AU - Zgrablich G AU - Henry CR AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Lab Ciencias Superficies, RA-5700 San Luis, ArgentinaCNRS, CRMC2, F-13288 Marseille, FranceZgrablich, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Lattice-gas study of the kinetics of the NO-CO catalytic reaction on Pd nanoclusters AB - The kinetics of the NO-CO reaction on Pd nanoclusters is studied through a lattice-gas model and Monte Carlo simulation. Pd nanoclusters with three typical sizes: 2.8 nm, 6.9 nm and 15.6 nm, are considered. These nanoclusters have been epitaxially grown on MgO(100) and tested for the NO-CO reaction in previous experimental work [ref. 9-11: C. H. F. Peden, D. W. Goodman, D. S. Blair, P. J. Berlowitz, G. B. Fisher and S. H. Oh, J. Phys. Chem., 1988, 92, 1563; C. Duriez, C. R. Henry and C. Chapon, Surf. Sci., 1991, 253, 190; L. Piccolo and C. R. Henry, Appl. Surf. Sci., 2000, 162-163, 670], thus providing the motivation for the present study. According to their size, the nanoclusters present different proportions of Pd(100) and Pd(111) facets. The effects of CO and NO desorption are found to be of fundamental importance for the behavior of the system. In all cases the medium size particles are found to be the most active. At low temperature, where NO desorption can be neglected (since the activation energy for desorption of NO on Pd is about 5 kcal mol(-1) greater than that for the desorption of CO), the largest particles are revealed as the less active, while at high temperature, where both NO and CO desorption take place, the smallest particles are found to be the less active. These results are in concordance with the experimentally observed behavior MH - Argentina MH - France MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000183914800027 L2 - MONTE-CARLO-SIMULATION; PD/MGO MODEL CATALYSTS; NITRIC-OXIDE; HEXAGONAL SURFACES; RHODIUM SURFACES; MOLECULAR-BEAM; CO+NO REACTION; REDUCTION; RH(111); ADSORPTION SO - Physical Chemistry Chemical Physics 2003 ;5(13):2906-2912 7549 UI - 8464 AU - Bustos V AU - Unac R AU - Zaera F AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City, DF, MexicoUniv Calif Riverside, Dept Chem, Riverside, CA 92521, USAUniv Nacl San Luis, Lab Ciencias Superfices & Med Porosos, RA-5700 San Luis, ArgentinaZgrablich, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City, DF, Mexico TI - Lattice-gas study of the kinetics of the catalytic NO-CO reaction on rhodium surfaces. II. The effect of nitrogen surface islands AB - The kinetics of the catalytic reduction of NO by CO on Rh(111) was simulated by using a Monte Carlo algorithm based on a lattice-gas model. The results reported here complement those reported before by incorporating new experimental results which reveal the formation of an N-NO intermediate as necessary for molecular nitrogen production as well as the formation of N-islands on the surface. The behavior of the steady-state phase diagram for the reaction is analyzed in terms of several parameters representing different reaction schemes. It is shown how the range of conditions under which the reaction can occur is influenced by the mechanism for the formation of the N-NO intermediate, by the growth of N surface islands, and by side steps such as NO surface diffusion and NO and CO desorption. (C) 2003 American Institute of Physics MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000182794300037 L2 - MONTE-CARLO SIMULATION; NITRIC-OXIDE; HEXAGONAL SURFACES; RH(111) SURFACES; REDUCTION; DECOMPOSITION; INTERMEDIATE; TRANSITIONS; TEMPERATURE; SQUARE SO - Journal of Chemical Physics 2003 ;118(20):9372-9379 7550 UI - 8978 AU - Bytev VV AU - Kuraev EA AU - Shaikhatdenov BG AD - Joint Inst Nucl Res, Dubna 141980, Moscow Oblast, RussiaInst Politecn Nacl, Dept Fis, CINVESTAV, Mexico City 07000, DF, MexicoBytev, VV, Joint Inst Nucl Res, Dubna 141980, Moscow Oblast, Russia TI - (Quasi)elastic large-angle electron-muon scattering in the two-loop approximation: Contributions of the eikonal type AB - A part of the eikonal-type contributions to the emu large-angle high-energy scattering cross section is considered in a quasielastic experimental setup. In addition to virtual corrections, we examine inelastic processes with emission of one and two soft real photons and soft lepton and pion pairs. Virtual photon contributions are given within a logarithmic accuracy. Box-type Feynman amplitudes with leptonic and a hadronic vacuum polarization insertion and double-box ones are considered explicitly. Wherever appropriate, the analytic expressions obtained are compared with those predicted by the structure function approach. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1063-7761 UR - ISI:000181441300004 L2 - RADIATIVE-CORRECTIONS; CROSS-SECTION SO - Journal of Experimental and Theoretical Physics 2003 ;96(2):193-201 7551 UI - 7877 AU - Caba M AU - Rovirosa MJ AU - Silver R AD - Univ Veracruzana, Reprod Biol Lab, IIB, Xalapa 91000, Veracruz, MexicoUAT, Ctr Invest Reprod Anim, CINVESTAV, Tlaxcala, MexicoColumbia Univ Barnard Coll, Dept Psychol, New York, NY 10027, USAColumbia Univ, New York, NY 10027, USAColumbia Univ Coll Phys & Surg, Dept Anat & Cell Biol, New York, NY 10032, USACaba, M, Univ Veracruzana, Reprod Biol Lab, IIB, AP 114, Xalapa 91000, Veracruz, Mexico TI - Suckling and genital stroking induces Fos expression in hypothalamic oxytocinergic neurons of rabbit pups AB - Maternal behaviour in the rabbit is unusual among mammals because the doe visits her litter to nurse once every 24 h. In the present study we examined the consequences of milk intake on oxytocinergic (OT) and vasopressinergic (AVP) neurons of the supraoptic (SON) and paraventricular (PVN) nuclei of 7-day-old pups before suckling, after suckling and following anogenital stroking in un-nursed pups. To determine neuronal activation we assessed the expression of the Fos protein combined with antibodies against OT and AVP at two levels in the SON (supraoptic rostral, SOr, and supraoptic retrochiasmatic, SOrch), and three levels in the PVN (anterior, PVab; medial PVm and caudal, PVc). Daily nursing bouts lasted only 228+/-6 s throughout the observed 7 days, and pups ingested up to 34.95+/-9.0% of their body weight in milk on day 7, the day of perfusion. Suckling induced a significant increase in the number of double-labeled Fos/OT cells in both subdivisions of the SON (P<0.01) and in PVab and PVm (P<0.01). The effect in the SON was related to suckling, as it was not seen in stroked, un-nursed pups, which showed Fos increases only in PVab and PVm. All regions in the SON and PVN showed significant increases in the number of Fos/AVP neurons after suckling or stroking but, contrary to OT, the number of double-labeled Fos/AVP cells was very low. In conclusion, our results show that the oxytocinergic system of the SON and PVN is differentially activated by suckling of milk and anogenital stroking, and that the vagal-hypothalamic axis is mature in 7-day-old rabbits. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Tlaxcala MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Developmental Biology;Neurosciences U5 - J;Article AV - English IS - 0165-3806 UR - ISI:000184376100001 L2 - food-intake;vasopressin;gastric distension;maternal behavior;supraoptic nucleus;paraventricular nucleus;PARAVENTRICULAR NUCLEUS; C-FOS; MATERNAL-BEHAVIOR; CIRCADIAN PATTERN; FOOD-INTAKE; RAT-BRAIN; VASOPRESSIN; STRESS; SECRETION; HORMONE SO - Developmental Brain Research 2003 ;143(2):119-128 7552 UI - 8710 AU - Caba M AU - Beyer C AU - Gonzalez-Mariscal G AU - Morrell JI AD - Univ Veracruzana, Inst Invest Biol, Reprod Biol Lab, Xalapa 91000, Veracruz, MexicoUniv Autonoma Tlaxcala, CINVESTAV, Ctr Invest Reprod Anim, Ixtacuixtla, Tlax, MexicoRutgers State Univ, Ctr Mol & Behav Neurosci, Newark, NJ 07102, USABeyer, C, UAT, CINVESTAV, CIRA, Apdo Postal 62, Tlaxcala 90000, Mexico TI - Immunocytochemical detection of estrogen receptor-alpha in the female rabbit forebrain: Topography and regulation by estradiol AB - Two antibodies (H222 and Zymed) directed towards different sites of the estrogen receptor-alpha (ERalpha) were used for the following objectives: (1) to map the ERalpha in the forebrain of ovariectomized (ovx) rabbits by immunocytochemistry and (2) to determine the effect of endogenous (intact non-pregnant animals) and exogenous (ovx, estrogen-treated animals) estradiol (E2) on the population of ERalpha in the forebrain. Similar results were obtained with both antibodies used: dense aggregations of ERalpha-immunoreactive (IR) neurons were found in the infundibular nucleus (IN), the medial preoptic area (POA), the bed nucleus of the stria terminalis (BNST), and some nuclei of the amygdala. By contrast, no ERalpha-IR neurons were present in the ventromedial hypothalamic nucleus (VMN), but a dense aggregation of ERalpha-IR neurons occurred lateral to it in nucleus X. Numerous ERalpha-IR neurons were observed in the paraventricular hypothalamic nucleus, but not in the supraoptic or suprachiasmatic nuclei. The hippocampus proper lacked ERalpha-IR neurons, but the ventral subiculum in the hippocampal formation had a dense group of such cells. Intact nonpregnant rabbits showed less ERalpha-IR neurons in all regions tested than ovx animals. This difference was particularly clear in the medial POA, amygdala and BNST, while the IN showed only a marginal decrease. The dorsal, but much less the ventral, part of nucleus X also showed a decrease in the number of ERalpha-IR neurons compared with ovx animals. E2 benzoate (5 mug/day for 5 days) reduced even further the number of ERalpha-IR neurons in all regions except in a circumscribed area of the IN and the ventral part of nucleus X. These results show the existence of both sensitive and insensitive neurons to the down-regulatory effect of E2 on the presence of ERalpha. Sensitive neurons are located in the telencephalon, POA and several hypothalamic nuclei (PVN), while insensitive neurons are mainly restricted to the IN and the ventral part of nucleus X in the basal hypothalamus. Copyright (C) 2003 S. Karger AG, Basel MH - Mexico|Tlaxcala MH - Mexico|Veracruz MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 14 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0028-3835 UR - ISI:000182242000007 L2 - preoptic area;limbic system;immunocytochemistry;estrous cycle;ovulation;paraventricular nucleus;gonadal steroids;gonadal steroid receptors;CENTRAL-NERVOUS-SYSTEM; CHIN-MARKING BEHAVIOR; IMMUNOREACTIVE CELLS; RAT-BRAIN; MESSENGER-RNA; GUINEA-PIG; MONOCLONAL-ANTIBODIES; CONCENTRATING CELLS; SEXUAL RECEPTIVITY; STRIA TERMINALIS SO - Neuroendocrinology 2003 ;77(3):208-222 7553 UI - 8300 AU - Caballero AR AU - Sunday SR AU - Halmi KA AD - Cornell Univ, Weill Coll Med, White Plains, NY 10605, USAInst Nacl Psiquiat Ramon de la Fuente, Mexico City, DF, MexicoHalmi, KA, Cornell Univ, Weill Coll Med, 21 Bloomingdale Rd, White Plains, NY 10605 USA TI - A comparison of cognitive and behavioral symptoms between Mexican and American eating disorder patients AB - Objective: Mexican and U.S. patients with anorexia nervosa or bulimia (complete and partial syndromes) were compared on severity and types of preoccupations and rituals related to eating disorders and the motivation to change. Method: One hundred seventy-four patients who met DSM-IV criteria for anorexia nervosa, bulimia nervosa, or ED-NOS participated. Eighty-seven subjects entered treatment at the Instituto Nacional de Psiquiatria "Ramon de la Fuente" in Mexico City and were matched with 87 patients treated at the New York Presbyterian Hospital. Patients were interviewed with the Yale-Brown-Cornell Eating Disorder Scale (YBC-EDS) (English or Spanish version). Results: All YBC-EDS scores were higher for the Mexican group, which also had a greater number of current preoccupations and rituals, U.S. and Mexican patients were quite similar in their endorsement of current preoccupations, but the Mexican group was more likely to have rituals in all checklist categories, and the rituals were more egosyntonic. More U.S. patients had received previous treatment for their eating disorder. A negative correlation was obtained between the amount of previous treatment and motivation to change the preoccupations and rituals (higher scores indicating lower motivation). Discussion: Cultural factors may influence characteristics of eating disorders. The previous treatment experiences of the U.S. patients seemed to positively influence their motivation for further treatment. (C) by Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Clinical;Nutrition & Dietetics;Psychiatry;Psychology U5 - J;Article AV - English IS - 0276-3478 UR - ISI:000183267300008 L2 - cultural comparisons;eating disorder;severity;motivation;ACCULTURATION; ATTITUDES; WOMEN SO - International Journal of Eating Disorders 2003 ;34(1):136-141 7554 UI - 5864 AU - Cabanas-Moreno JG AU - Calderon HA AU - Umemoto M AD - ESFM, Inst Politecn Nacl, Unidad Prof ALM, Mexico City 07338, DF, MexicoToyohashi Univ Technol, Toyohashi, Aichi 441, JapanCabanas-Moreno, JG, ESFM, Inst Politecn Nacl, Unidad Prof ALM, Mexico City 07338, DF, Mexico TI - Mechanical alloying in the experimental production of structural materials AB - In the last 10 years we have experimented with the use of the mechanical alloying process to produce a number of materials which could be of interest in structural applications. The materials investigated include intermetallic compounds from the Al-Ni, Al-Ti, Al-Co-Ti and Co-Ti systems, as well as composites of Fe-TiN and Cu-graphite. In most cases, the mechanically alloyed powders have been rapidly consolidated by means of spark plasma sintering. In this way, consolidated products have been obtained which keep the fine microstructure (or nanostructure) conferred by the mechanical alloying process; that is, they constitute bulk nanostructured materials. As a rule, the combination of mechanical alloying and fast sintering has yielded materials with grain sizes typically below 100 nm (nanostructured materials). As a consequence of these refined structures, high mechanical strengths have been observed in most cases in which porosity levels were low. For example, maximum flow stresses as high as 3 GPa were measured in intermetallic alloys of the Al-Ti system having grain sizes below 50 nm. Complications related to contamination during the mechanical alloying process represent a potential problem in most of the experiments performed. Nevertheless, by careful control of process conditions or, perhaps more importantly, clever design of the process and material, this disadvantage can be turned around and even be used to the benefit of the properties of the final product. Such are the cases with the Fe-TiN and Cu-graphite composites investigated in our work MH - Japan MH - Mexico|Distrito Federal PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000189444600021 L2 - composites;intermetallics;mechanical alloying;nanostructures;structural materials;NANOCRYSTALLINE CU; GRAIN-SIZE; BEHAVIOR; MICROSTRUCTURE; INTERMETALLICS; DEFORMATION; STRENGTH; PD SO - Advanced Structural Materials 2003 ;442():133-142 7555 UI - 8552 AU - Cabello-Pasini A AU - Muniz-Salazar R AU - Ward DH AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUS Geol Survey, Alaska Sci Ctr, Anchorage, AK 99503, USACabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Annual variations of biomass and photosynthesis in Zostera marina at its southern end of distribution in the North Pacific AB - Density, biomass, morphology, phenology and photosynthetic characteristics of Zostera marina were related to continuous measurements of in situ irradiance, attenuation coefficient and temperature at three coastal lagoons in Baja California, Mexico. In situ irradiance was approximately two-fold lower at San Quintin Bay (SQ) than at Ojo de Liebre Lagoon (OL) and San Ignacio Lagoon (SI). As a consequence of the greater irradiance, plants at OL and SI were established 1 m deeper within the water column than those at SQ. At SQ, there was a four-fold variation in biomass of Z. marina caused by changes on shoot length and not shoot density, while at OL and SI biomass and shoot length did not fluctuate significantly throughout the year. Reproductive shoot density reached maximum values concomitantly with the greatest irradiance during spring-summer, however, the density was approximately three-fold greater at SQ than at the southern coastal lagoons. While irradiance levels were two-fold greater at the southern lagoons, in general, photosynthetic characteristics were similar among all three lagoons. The hours of light saturated photosynthesis, calculated from their photosynthetic characteristics and irradiance measurements, suggest that photosynthesis of shoots from OL and SI are saturated for more than 6 h per day throughout the year, while shoots from SQ are likely light limited during approximately 15% of the year. Consequently, an increase in attenuation coefficient values in the water column will likely decrease light availability to Z. marina plants at SQ, potentially decreasing their survival. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000182701000003 L2 - Baja California;hours of light saturated photosynthesis (H-sat);photosynthesis;seasonality;turbidity;Zostera marina;SAN-FRANCISCO BAY; EELGRASS; LIGHT; SURVIVAL; GROWTH; POPULATIONS; ATTENUATION; ESTUARY; MEXICO SO - Aquatic Botany 2003 ;76(1):31-47 7556 UI - 7254 AU - Cabrera MEM AU - Sujo LC AU - Villalba L AU - Peinado JS AU - Jimenez AC AU - Miranda AL AU - Peraza EFH AD - Ctr Invest & Mat Avanzados, Chihuahua 31109, Chih, MexicoInst Technol Chihuahua II, Chihuahua, Chih, MexicoInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoInst Super Ciencias & Tecnol Nucl, Salvador Allende 10600, Habana, CubaCabrera, MEM, Ctr Invest & Mat Avanzados, Miguel Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Chih, Mexico TI - Calibration of diffusion barrier charcoal detectors using a semi-empirical expression AB - Several calibration settings of diffusion barrier charcoal canister (DBCC) detectors for measuring radon concentration in air were studied. A set of functions and graphs were developed for relations between radon concentration in air and adsorbed activity in DBCC, when calibrated in small chambers. Both the integration time for 10% of DBCC of a batch, and the radon adsorption coefficient for the activated charcoal used in these detectors, were determined. Thus, a semi-empirical expression for detector calibration was applied. (C) 2003 Elsevier Ltd. All rights reserved MH - Cuba MH - Mexico|Chihuahua MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8043 UR - ISI:000185941300011 L2 - radon;activated charcoal detectors;diffusion barrier;radon adsorption-desorption;calibration;ACTIVATED-CHARCOAL; INDOOR AIR; RN-222; ADSORPTION; COLLECTOR SO - Applied Radiation and Isotopes 2003 ;59(4):281-287 7557 UI - 6733 AU - Cabrero IA AU - Alvarez MC AU - Montiel DP AU - Tavassoli FA AD - Armed Forces Inst Pathol, Dept Gynecol & Breast Pathol, Washington, DC 20306, USAHosp Oncol CMN Siglo XXI, Dept Pathol, Mexico City, DF, MexicoCabrero, IA, Col Del Valle Del Benito Juarez,Sanchez Azcona 16, Mexico City 03100, DF, Mexico TI - Metastases to the breast AB - Aim: The aim of this study was to report the clinico-pathological features of a series of patients with metastatic neoplasms to the breast. Methods: A 10-year archive of surgical material was reviewed. A search was performed on all 10 650 breast neoplastic cases in the files of the Pathology Department from 1990 to 2000. Results: There were 22 women and two men. The most common primary sites for solid tumours were cutaneous melanoma and ovarian carcinoma. Two of the 24 patients had no prior history of malignant disease. There was a solitary nodule in 17 cases; in seven cases there were multiple lesions in the same breast. Sixteen patients had a rapidly fulminating course and died of disease. Six patients are alive with disease and two patients were lost to follow-up. Conclusion: Recognition of these lesions as being metastatic may pre-empt radical surgery. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 2 U4 - Oncology;Surgery U5 - J;Article AV - English IS - 0748-7983 UR - ISI:000187128700006 L2 - breast;metastases;extramammary primary;CARCINOMA; MALIGNANCIES; NEOPLASMS; OVARY; TUMOR; NODE SO - European Journal of Surgical Oncology 2003 ;29(10):854-855 7558 UI - 7859 AU - Caceres-Martinez J AU - Del Rio-Portilla MA AU - Gutierrez SC AU - Humaran IMG AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoInst Nacl Pesca, Mexico City 03310, DF, MexicoCaceres-Martinez, J, CICESE, Dept Aquaculture, POB 434844, San Diego, CA 92143 USA TI - Phenotypes of the California mussel, Mytilus californianus, Conrad (1837) AB - The morphological variability of Mytilus edulis complex species has been the subject of a variety of studies. However, the morphological variability of Mytilus californianus has not been studied. We found that there are some M. californianus without some of the shell characteristics mentioned by Conrad (1837) in the original description of this species. The most remarkable difference was the absence of radial ribs on the exterior of the shell; thus, we tested the presence of at least two phenotypes in M. californianus. Six hundred ninety five M. californianus of different sizes were collected from the locations La Mina del Fraile. La Bufadora, and La Salina in Baja California. For comparison, 58 M. galloprovincialis were collected from an aquaculture facility at Rincon de Ballenas in Bahia de Todos Santos, Baja California. Fourteen morphometric measures and the weight of the shell were measured and a principal component analysis (PCA) and a logistic regression (LR) were carried out to find differences between mussels studied and for obtaining a prediction to assign the phenotypes. The presence of ribs, small ligament margin, a narrow posterior byssal retractor muscle scar, and shell weight were the discriminating characters between two groups in M. californianus. These findings confirm the presence of at least two phenotypes in this species, in all mussel sizes and the studied locations. The LR correctly assigned 99.28% of the shells to each phenotype, and it considered only eight out of the fifteen morphometric measures. The PCA showed a clear morphologic difference between both phenotypes of M. californianus and M. galloprovincialis. The original description of this species by Conrad in 1837 was done taking into account only the phenotype with ribs MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000184373200016 L2 - Mytilus californianus;Mytilus edulis complex species;morphological variability;phenotypes;PACIFIC COAST; SHELL MORPHOLOGY; GENUS MYTILUS; NORTH-AMERICA; EDULIS; GALLOPROVINCIALIS; PROSOBRANCHIA; MECHANISMS; TROSSULUS SO - Journal of Shellfish Research 2003 ;22(1):135-140 7559 UI - 2541 AU - Caidi N AU - Bergeron P AU - Dufour C AU - Cortes J AU - Rumble J AD - CUNY Queens Coll, Flushing, NY 11367, USA. Fac Informat Studies, Toronto, ON M5S 3G6, Canada. Univ Montreal, Ecole Bibliotheconom & Sci Informat, Montreal, PQ H3C 3J7, Canada. Univ Autonoma Ciudad, Mexico City, DF, Mexico. NIST, Gaithersburg, MD 20899, USA TI - Transborder data flow: Implications for information dissemination and policies between the US, Canada and Mexico - Sponsored by SIG IFP, III AB - The convergence of computing and networking has affected the ways in which people live, work and learn; the way institutions operate; and raised new issues and challenges for governments. National and global initiatives have been implemented to address the blurring of boundaries -geographical and political caused by electronic data transfer over these global networks. The flow of electronic data and digital content across jurisdictional lines calls for novel -or updated- laws and regulatory solutions (e.g., data protection, privacy, content regulation, etc.) MH - Canada MH - Mexico|Distrito Federal MH - USA T3 - ASIST 2003: PROCEEDINGS OF THE 66TH ASIST ANNUAL MEETINGProceedings of the asist annual meeting PB - MEDFORD: INFORMATION TODAY INC RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Information Systems; Information Science & Library Science U5 - S;Article NT - SEnglishArticlecaidi@fis.utoronto.ca pierrette.bergeron@UMontreal.ca christine.dufour@UMontreal.ca jcortes@uacj.mx john.rumble@nist.gov0143 OLD MARLTON PIKE, MEDFORD, NJ 08055 USAP ASIST ANNU MEETBBZ20 AV - English IS - 0044-7English870 UR - ISI:000228354100058 SO - 2003 ;(40, 2003):437-438 7560 UI - 6805 AU - Cairns MA AU - Olmsted I AU - Granados J AU - Argaez J AD - US EPA, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, Corvallis, OR 97333, USACtr Invest Cient Yucatan, Dept Recursos Nat, Yucatan 97310, MexicoCairns, MA, US EPA, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, 200 SW 35Th St, Corvallis, OR 97333 USA TI - Composition and aboveground tree biomass of a dry semi-evergreen forest on Mexico's Yucatan Peninsula AB - Forest biomass estimates are used to help quantify pools and flux of greenhouse gases (e.g., CO2-C) from the terrestrial biosphere to the atmosphere associated with land-use and land cover changes. Such estimates based on direct measurements are quite limited for tropical dry forests. The goal of this study was to assess the species composition and biomass density in an intact Mexican forest representative of the tropical dry forest biome. We then compared our measured biomass with biomass estimates computed with a published model in current use. A total of 72 species were found in a 0.5 ha stand with a basal area of 31.3 m(2) ha(-1). The dominant species, in terms of biomass, were Brosimum alicastrum Sw., Manilkara zapota (L.) Royen, Luehea speciosa Wildl., Pouteria unilocularis (Donn. Sm.) Baehni, Trichilia minutiflora Standl., and Spondias mombin Linn. Tree heights ranged up to 30 m and dbh to 82.1 cm. Species-specific biomass regression models were developed for the six most common species of large (>10 cm dbh) trees and for the nine most common species of small (<10 cm dbh) trees from the destructive harvest of 698 trees. Mass of large trees (n = 195) were used to derive the regression model Y = exp{-2.173 + 0.868 ln((DTH)-T-2) + 0.0939/2}, where Y is the total dry weight (kg), D the dbh (cm), and TH the total height (m). Total above ground tree biomass was estimated to be 225 Mg ha(-1), and was dominated (85%) by the biomass of the large trees. The actual biomass of each of the 195 large trees was compared to individual tree biomass calculated with a published regression model [Estimating biomass and biomass change of tropical forests. A primer. FAO Forestry Paper 134. Food and Agriculture Organization of the United Nations, Rome, Italy, 1997] that is based on measurements of 29 trees. We found that the published model underestimated biomass of these trees by 31% (37.6 versus 54.4 Mg). Calculated biomass was less than measured biomass for 29 of 33 species. The current study points to the value of site-specific assessment of above ground biomass and may contribute to more accurate estimates of dry tropical forest biomass densities currently used to estimate greenhouse gas flux from land management activity. Published by Elsevier B.V MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000186868100010 L2 - aboveground biomass;allometric regression equations;semi-evergreen tropical dry forest;Yucatan Peninsula;forest composition;carbon dynamics;GLOBAL CARBON-CYCLE; TROPICAL FORESTS SO - Forest Ecology and Management 2003 ;186(1-3):125-132 7561 UI - 6738 AU - Cakir M AU - Spackman M AU - Wellings CR AU - Galwey NW AU - Moody DB AU - Poulsen D AU - Ogbonnaya FC AU - Vivar H AD - Univ Western Australia, Fac Nat & Agr Sci, Sch Plant Biol Plant Sci, Crawley, WA 6907, AustraliaVictorian Inst Dryland Agr, Dept Primary Ind, Horsham, Vic 3401, AustraliaUniv Sydney, Plant Breeding Inst Cobbitty, Camden, NSW 2570, AustraliaQueensland Dept Primary Ind, Hermitage Res Stn, Warwick, Qld 4370, AustraliaCIMMYT, ICARDA, Mexico City 6, DF, MexicoCakir, M, Murdoch Univ, Div Sci & Engn, WA State Agr Biotechnol Ctr, Murdoch, WA 6150, Australia TI - Molecular mapping as a tool for pre-emptive breeding for resistance to the exotic barley pathogen, Puccinia striiformis f. sp hordei AB - Barley stripe rust (BSR), caused by Puccinia striiformis f. sp. hordei, has been a major disease problem to the barley industry worldwide that has not, to date, been detected in Australia. This paper describes the mapping of stripe rust resistance genes in Tallon/Kaputar (TK) and Arapiles/Franklin (AF) populations. The paper also reports on the usefulness of markers associated with alternative sources of resistance previously identified in the varieties Orca and Shyri in the USA. Stripe rust screening was conducted at the adult plant stage in Toluca, Mexico, for 2 years. Two major quantitative trait loci (QTLs) were found on chromosomes 2H and 5H in both populations. One region on chromosome 5H was highly significantly associated with resistance to stripe rust (R-2 = 68% and 34% in TK and AF, respectively). The QTL on chromosome 2H accounted for 36% of the variation in TK and 10% of the variation in the AF population. These associations were consistent over both years. Further work will involve screening for additional markers in the target regions to identify polymorphism that can be used to select for multiple resistances in the absence of the pathogen MH - Australia MH - Mexico|Distrito Federal PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0004-9409 UR - ISI:000187197500027 L2 - SSR;AFLP;RFLP;genetic mapping;stripe rust;QUANTITATIVE TRAIT LOCI; STRIPE RUST; VULGARE; MAP; AUSTRALIA; SOFTWARE; GRAIN; GENES; YIELD SO - Australian Journal of Agricultural Research 2003 ;54(11-12):1351-1357 7562 UI - 9045 AU - Calaminici P AU - Koster AM AU - Salahub DR AD - CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoUniv Calgary, Calgary, AB T2N 1N4, CanadaCalaminici, P, CINVESTAV, Dept Quim, Av Inst Politecn Nacl 2508,AP 14-740, Mexico City 07000, DF, Mexico TI - Negative ion photoelectron spectra simulation of V3O from a density functional study AB - A density functional study of neutral and anionic vanadium trimer monoxides is presented. The calculations were of all-electron type employing a newly developed basis set for the vanadium atom. Different isomers of V3O and V3O- were studied in order to determine the ground state structures. For both systems a planar C-2v structure with an edge-bonded oxygen atom was found as the ground state. Equilibrium structure parameters of ground states as well as low-lying excited states, harmonic frequencies, the adiabatic electron affinity, and Kohn-Sham orbital diagrams are reported. The experimental negative ion photoelectron spectra of V3O was simulated by calculating multidimensional Franck-Condon factors, using the geometries and harmonic frequencies of the calculated ground states of V3O- and V3O. The good agreement between the experimental and the theoretical spectra allows the determination of the ground state structure of V3O and V3O-. This represents the first work in which a simulation of a vibrationally resolved negative ion photoelectron spectra of a transition metal oxide is presented. (C) 2003 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000181289000015 L2 - ENERGY; SPECTROSCOPY; MOLECULES; APPROXIMATION; OPTIMIZATION; TRANSITIONS; SYMMETRY; NB3O SO - Journal of Chemical Physics 2003 ;118(11):4913-4919 7563 UI - 6928 AU - Calderini DF AU - Ortiz-Monasterio I AD - CIMMYT, Int Ctr Maize & Wheat Improvement, Mexico City 06600, DF, MexicoCalderini, DF, Univ Austral Chile, Inst Prod & Sanidad Vegetal, Casilla 567,Campus Isla Teja, Valdivia, Chile TI - Are synthetic hexaploids a means of increasing grain element concentrations in wheat? AB - Element concentration in wheat grains is an important objective of plant breeding programs. For this purpose, synthetic hexaploid lines (Triticum durum x Aegilops tauschii) have been identified as potential sources of high element concentration in grains. However, it is not known if these lines reach higher element concentrations in grains as the consequence of a dilution effect due to lower grain yield. In addition, most of the studies carried out with these lines did not evaluate above-ground element uptake. The objective of this study was to improve understanding of grain element concentrations as a function of grain yield, element uptake and biomass and element partitioning to grains in synthetic and conventional cultivars of wheat. One experiment with two standard sowing dates was carried out under field conditions. Biomass, grain yield, and macronutrient (Ca, Mg, K, P and S) and micronutrient (Cu, Fe, Mn and Zn) concentrations in grains and vegetative tissues were measured in two cultivars and one synthetic (chosen from ten lines). The synthetic showed higher element concentration in grains, e. g. between 25 and 30% for Fe, Mn and Zn across sowing dates, than cultivars while grain yield was similar or lower, depending on the sowing date. On the contrary, the synthetic showed lower concentration of Ca in grains. This line showed also higher uptake of Fe, Mn, K and P than cultivars. The superior grain element concentration of the synthetic line was not only due to a dilution effect but also to a higher uptake efficiency. Therefore, synthetics would be a valuable source of germplasm for increasing element grain concentration, at least in this case for Fe, Mn, K and P MH - Chile MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000186610900005 L2 - element grain concentration;element uptake;macronutrients;micronutrients;wheat;WILD TETRAPLOID WHEAT; 4 NITROGEN RATES; X T-TAUSCHII; GENETIC PROGRESS; WINTER-WHEAT; DRY-MATTER; YIELD; EFFICIENCY; CONSEQUENCES; ACCUMULATION SO - Euphytica 2003 ;134(2):169-178 7564 UI - 9000 AU - Calderini DF AU - Ortiz-Monasterio I AD - Univ Buenos Aires, Fac Agron, Dep Prod Vegetal, RA-1053 Buenos Aires, DF, ArgentinaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoCalderini, DF, Univ Buenos Aires, Fac Agron, Dep Prod Vegetal, RA-1053 Buenos Aires, DF, Argentina TI - Grain position affects grain macronutrient and micronutrient concentrations in wheat AB - Little is known about nutrient distribution within the spike of bread wheat (Triticum aestivum L.). This knowledge is important for determining breeding strategies aimed at increasing grain yield without affecting nutritional quality. The objective of this study was to gain a better understanding of how grain position affects nutrient concentration, dry matter distribution, and water dynamics of grains. An experiment using two sowing dates was performed under field conditions. Dry weight and concentrations of macronutrients (Ca, Mg, K, P, and S) and micronutrients (Cu, Fe, Mn, and Zn) in grains from the basal (BS), central (CS), and apical spikelets (AS) of two cultivars and one synthetic hexaploid line were determined. Grain water dynamics and nutrient and dry matter concentrations were also measured throughout the grain-filling period for the second sowing date. Genotypes showed different distributions of dry matter in different grain positions. Grain macronutrient and micronutrient concentrations in all genotypes decreased at grain positions more distal from the rachis. This reduction was as great as 30% (Ca) but varied by nutrient (e.g., Zn = -18%; S = -10%; K = +1%). Grain water content did not differ between grains. The observed differences in grain weight and nutrient concentration between grain positions could have important implications for wheat breeding. They suggest that it might be more effective to select for higher grain yield by increasing individual grain weight rather than grain number, a strategy that, in addition, would be less likely to affect the balance of nutrient concentrations within the spike MH - Argentina MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181430300020 L2 - X T-TAUSCHII; DRY-MATTER; GENETIC-IMPROVEMENT; YIELD STABILITY; NITROGEN; GROWTH; WEIGHT; POSTANTHESIS; ACCUMULATION; EFFICIENCY SO - Crop Science 2003 ;43(1):141-151 7565 UI - 7674 AU - Calderon-Garciduenas L AU - Maronpot RR AU - Torres-Jardon R AU - Henriquez-Roldan C AU - Schoonhoven R AU - cuna-Ayala H AU - Villarreal-Calderon A AU - Nakamura J AU - Fernando R AU - Reed W AU - Azzarelli B AU - Swenberg JA AD - Univ N Carolina, Environm Pathol Program, Chapel Hill, NC 27599, USAInst Nacl Pediat, Mexico City 14410, DF, MexicoNIEHS, Res Triangle Pk, NC 27709, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv Valparaiso, Dept Estadist, Valparaiso, ChileUniv N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27599, USAUniv Nacl Autonoma Mexico, NUCE, Fac Med, Mexico City 04510, DF, MexicoRTI Int, Res Triangle Pk, NC 27709, USAUniv N Carolina, Dept Pediat, Chapel Hill, NC 27599, USAUniv N Carolina, Ctr Environm Med Asthma & Lung Biol, Chapel Hill, NC 27599, USAIndiana Univ, Dept Pathol, Indianapolis, IN 46202, USACalderon-Garciduenas, L, Univ N Carolina, Environm Pathol Program, 348 Rosenau Hall CB 7431, Chapel Hill, NC 27599 USA TI - DNA damage in nasal and brain tissues of canines exposed to air pollutants is associated with evidence of chronic brain inflammation and neurodegeneration AB - Acute, subchronic, or chronic exposures to particulate matter (PM) and pollutant gases affect people in urban areas and those exposed to fires, disasters, and wars. Respiratory tract inflammation, production of mediators of inflammation capable of reaching the brain, systemic circulation of PM, and disruption of the nasal respiratory and olfactory barriers are likely in these populations. DNA damage is crucial in aging and in age-associated diseases such as Alzheimer's disease. We evaluated apurinic/apyrimidinic (AP) sites in nasal and brain genomic DNA, and explored by immunohistochemistry the expression of nuclear factor NFkappaB p65, inducible nitric oxide synthase (iNOS), cyclo-oxygenase 2 (COX2), metallothionein I and II, apolipoprotein E, amyloid precursor protein (APP), and beta-amyloid(1-42) in healthy dogs naturally exposed to urban pollution in Mexico City. Nickel (Ni) and vanadium (V) were measured by inductively coupled plasma mass spectrometry (ICP-MS). Forty mongrel dogs, ages 7 days-10 years were studied (14 controls from Tlaxcala and 26 exposed to urban pollution in South West Metropolitan Mexico City (SWMMC)). Nasal respiratory and olfactory epithelium were found to be early pollutant targets. Olfactory bulb and hippocampal AP sites were significantly higher in exposed than in control age matched animals. Ni and V were present in a gradient from olfactory mucosa > olfactory bulb > frontal cortex. Exposed dogs had (a) nuclear neuronal NFkappaB p65, (b) endothelial, glial and neuronal iNOS, (c) endothelial and glial COX2, (d) ApoE in neuronal, glial and vascular cells, and (e) APP and beta amyloid(1-42) in neurons, diffuse plaques (the earliest at age 11 months), and in subarachnoid blood vessels. Increased AP sites and the inflammatory and stress protein brain responses were early and significant in dogs exposed to urban pollution. Oil combustion PM-associated metals Ni and V were detected in the brain. There was an acceleration of Alzheimer's-type pathology in dogs chronically exposed to air pollutants. Respiratory tract inflammation and deteriorating olfactory and respiratory barriers may play a role in the observed neuropathology. These data suggest that Alzheimer's disease may be the sequela of air pollutant exposures and the resulting systemic inflammation MH - Chile MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 13 U4 - Pathology;Toxicology U5 - J;Review AV - English IS - 0192-6233 UR - ISI:000184789300009 L2 - urban pollution;Alzheimer's disease;ozone;ultrafine particulate matter;brain inflammation;combustion metals;nasal and olfactory pathology;blood-brain barrier;DNA oxidative damage;AMYLOID PRECURSOR PROTEIN; NF-KAPPA-B; APURINIC APYRIMIDINIC SITES; ASSESSING CHRONIC EXPOSURES; AGE-RELATED-CHANGES; ALZHEIMERS-DISEASE; RAT-BRAIN; OXIDATIVE DAMAGE; MEXICO-CITY; NITRIC-OXIDE SO - Toxicologic Pathology 2003 ;31(5):524-538 7566 UI - 7757 AU - Calderon-Garciduenas L AU - Mora-Tiscareno A AU - Fordham LA AU - Valencia-Salazar G AU - Chung CJ AU - Rodriguez-Alcaraz A AU - Paredes R AU - Variakojis D AU - Villarreal-Calderon A AU - Flores-Camacho L AU - ntunez-Solis A AU - Henriquez-Roldan C AU - Hazucha MJ AD - Univ N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27599, USAInst Nacl Pediat, Mexico City, DF, MexicoUniv N Carolina, Dept Radiol, Chapel Hill, NC 27599, USASociedad Mexicana ORL & CCC, Mexico City, DF, MexicoNorthwestern Univ, Sch Med, Dept Pathol, Chicago, IL, USAUniv Nacl Autonoma Mexico, NUCE, Fac Med, Chicago, IL, USAUniv Valparaiso, Dept Estadist, Valparaiso, ChileUniv N Carolina, Ctr Environm Med Asthma & Lung Biol, Chapel Hill, NC 27599, USACalderon-Garciduenas, L, Univ N Carolina, Dept Environm Sci & Engn, 348 Rosenau Hall,CB 7431, Chapel Hill, NC 27599 USA TI - Respiratory damage in children exposed to urban pollution AB - Southwest Metropolitan Mexico City (SWMMC) children are chronically exposed to complex mixtures of air pollutants. In a cross-sectional arm of our study, we investigated the association between exposure to SWMMC atmosphere and nasal abnormalities, hyperinflation, and interstitial markings assessed by chest X-rays, lung function changes, several serum cytokines, and endothelin-1 in 174 children aged 5-17 years vs. 27 control children residents in low-polluted areas. Control children had no nasal lesions, and only one child showed an abnormal chest X-ray. SWMMC children exhibited nasal abnormalities (22%), hyperinflation (67%), interstitial markings (49%), and a mild restrictive pattern by spirometry (10%). Interstitial markings were associated with a decrease in predicted values of FEF25-75, FEF75, and the FEV1/FVC ratio. Boys had a higher probability of developing interstitial markings with age (P = 0.004). Blood smear findings included toxic granulations in nweutrophils and schistocytes. SWMMC children had more serum IL10 and IL6 and less IL8 than controls. In a longitudinal arm of our study, we found a significant seasonal drop in FVC and FEV1 associated with a 6-month period of high ozone and PM10 levels. Our data strongly suggest that a lifelong exposure to urban air pollution causes respiratory damage in children. Moreover, a cytokine network becomes imbalanced, with a shift towards upregulation of anti-inflammatory cytokines. Consequently, these children are potentially at risk for developing chronic lung disease and other systemic effects later in life. (C) 2003 Wiley-Liss, Inc MH - Chile MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 17 U4 - Pediatrics;Respiratory System U5 - J;Article AV - English IS - 8755-6863 UR - ISI:000184621100010 L2 - ozone;particulate matter;spirometry;X-rays;cytokines;ET-1;OBSTRUCTIVE PULMONARY-DISEASE; ASSESSING CHRONIC EXPOSURES; SOUTHWEST MEXICO-CITY; AIR-POLLUTION; LUNG HYPERINFLATION; SCORING SYSTEM; BONE-MARROW; INTERLEUKIN-10; POLLUTANTS; PATHOLOGY SO - Pediatric Pulmonology 2003 ;36(2):148-161 7567 UI - 8929 AU - Calderon-Gonzalez R AD - Hosp San Jose Tec Monterrey, Pediatr Neurol Serv, Ctr Neurol Ninos & Adolescents, Monterrey, MexicoITESM, Div Hlth Sci, Ignacio A Santos Sch Med, Grad Med Sch, Monterey, CA, USACalderon-Gonzalez, R, Hosp San Jose Tec Monterrey, Pediatr Neurol Serv, Ctr Neurol Ninos & Adolescents, Monterrey, Mexico TI - A Mexican pediatric neurologist: An autobiographical sketch MH - Mexico|Nuevo Leon MH - USA PB - HAMILTON: B C DECKER INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Pediatrics U5 - J;Biographical-Item AV - English IS - 0883-0738 UR - ISI:000181645500010 SO - Journal of Child Neurology 2003 ;18(1):50-53 7568 UI - 7613 AU - Calderon-Martinez JA AU - Campoy-Cervera P AD - Univ Politecn Madrid, Dept Automat Control Elect Engn & Ind Comp, E-28006 Madrid, Spain. Inst Tecnol Aguascalientes, Aguascalientes 20256, Ags, Mexico TI - Defects detection in continuous manufacturing by means of convolutional neural networks AB - Detecting defects in paper pulp manufacturing process's using a non-touched, effective, on-line and fast method is critical in the paper industry. This work presents a neural network based system for detecting pitch and shive defects using digital filters generated by a Convolutional Neural Architecture. The main subjects discussed are: generating digital filters automatically, filters optimal size for this application, and detecting and identifying defects. The experimental results exhibit how simple and powerful is the architecture designed for generating filters to detect different defect types MH - Mexico|Aguascalientes MH - Spain T3 - ARTIFICIAL NEURAL NETS PROBLEM SOLVING METHODSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBX35H AV - English IS - 0302-9743 UR - ISI:000185042300067 SO - 2003 ;():528-535 7569 UI - 6169 AU - Calkin N AU - Merino C AU - Noble S AU - Noy M AD - Clemson Univ, Dept Math Sci, Clemson, SC 29634, USABrunel Univ, Dept Math Sci, Uxbridge UB8 3PH, Middx, EnglandUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, SpainCalkin, N, Clemson Univ, Dept Math Sci, Martin Hall Box 341907, Clemson, SC 29634 USA TI - Improved bounds for the number of forests and acyclic orientations in the square lattice AB - In a recent paper Merino and Welsh (1999) studied several counting problems on the square lattice L-n. There the authors gave the following bounds for the asymptotics of f(n), the number of forests of L-n, and alpha(n), the number of acyclic orientations of L-n:3.209912 less than or equal to lim(n-->infinity) f(n)(1/n 2) less than or equal to 3.84161 and 22/7 less than or equal to lim(n-->infinity) alpha(n)(1/n 2) less than or equal to 3.70925. In this paper we improve these bounds as follows: 3.64497 less than or equal to lim(n-->infinity) f(n)(1/n 2) less than or equal to 3.74101 and 3.41358 less than or equal to lim(n-->infinity) alpha(n)(1/n 2) less than or equal to 3.55449. We obtain this by developing a method for computing the Tutte polynomial of the square lattice and other related graphs based on transfer matrices MH - United Kingdom MH - Mexico|Distrito Federal MH - USA MH - Spain PB - NEWARK: ELECTRONIC JOURNAL OF COMBINATORICS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1077-8926 UR - ISI:000189113100004 SO - Electronic Journal of Combinatorics 2003 ;10(1): 7570 UI - 9225 AU - Calmus T AU - guillon-Robles A AU - Maury RC AU - Bellon H AU - Benoit M AU - Cotten J AU - Bourgois J AU - Michaud F AD - Univ Autonoma Madrid, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoUniv Bretagne Occidentale, IUEM, UMR 6538, F-29285 Brest, FranceZona Univ, Inst Geol, UASLP, San Luis Potosi 78250, SLP, MexicoUniv Bretagne Occidentale, IUEM, UMR 6538, F-29280 Plouzane, FranceIRD, Guayaquil, EcuadorCNRS, Villefranche Sur Mer, FranceUniv Paris 06, UMR 6526, F-06235 Villefranche Sur Mer, FranceCalmus, T, Univ Autonoma Madrid, Inst Geol, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo 83000, Sonora, Mexico TI - Spatial and temporal evolution of basalts and magnesian andesites ("bajaites") from Baja California, Mexico: the role of slab melts AB - Late Miocene to Quaternary basalts and associated magnesian basaltic andesites and andesites, locally referred to as "bajaites", occur in the central part of the Baja California (BC) Peninsula. They form five volcanic fields (Jaraguay, San Borja, San Ignacio, Santa Rosalia, La Purisima) delineating a 600-km-long array parallel to the Gulf of California. They range in age from Late Miocene to Pleistocene, and display very specific geochemical characteristics: SiO2=50% to 58%, high MgO contents, very low FeO*/MgO ratios usually less than 1.5, highly fractionated rare earth element patterns with low Y and heavy rare earth element, very high Sr (commonly between 2000 and 3000 ppm) and Ba (up to 2300 ppm) contents. The geochemical study and K-Ar dating of ca. 50 samples of these rocks allow us to show that most of their incompatible element ratios, which vary significantly in space and time, reflect source heterogeneities rather than partial melting, fractional crystallisation or crustal contamination effects. Their slab melt imprint increases from northwest to southeast and with time. It is best expressed in the geochemical signatures of Quaternary lavas from La Purisima volcanic field. These features reflect the origin of the "bajaites" by melting of mantle peridotites previously metasomatised by slab melts, in connection with the opening of an asthenospheric window below the Baja California Peninsula during Early and Middle Miocene in northern Baja California, and during Late Miocene in southern Baja California. Melting was initiated by the high thermal regime accompanying ridge subduction or slab tearing/breakoff, and later by Plio-Pleistocene thermal pulses linked to the opening of the Gulf of California. We show that the incongruent melting of metasomatic pargasitic amphibole, leaving a garnet-rich residue, accounts for most of the specific geochemical features of the magnesian andesite suite. This breakdown started at ca. 1000 degreesC at depths of 70 - 110 km, and amphibole was probably not entirely consumed during the melting process. (C) 2002 Elsevier Science B.V. All rights reserved MH - Ecuador MH - France MH - Mexico|San Luis Potosi MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 26 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0024-4937 UR - ISI:000180902400005 L2 - magnesian andesite;slab melt;mantle wedge;asthenospheric window;Baja California;Mexico;SETOUCHI VOLCANIC BELT; RARE-EARTH-ELEMENT; EAST PACIFIC RISE; ISLAND-ARC MANTLE; HIGH-MG ANDESITES; RIDGE-SUBDUCTION; CENOZOIC VOLCANISM; CONTINENTAL-CRUST; TAITAO PENINSULA; PERIDOTITE INTERACTION SO - Lithos 2003 ;66(1-2):77-105 7571 UI - 7170 AU - Calogero F AU - Francoise JP AU - Guillot A AD - Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, ItalyIst Nazl Fis Nucl, Sez Roma, Rome, ItalyUniv Paris 06, GSIB, F-75013 Paris, FranceUniv Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca, Morelos, MexicoCalogero, F, Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 2, I-00185 Rome, Italy TI - A further solvable three-body problem in the plane AB - The solution is provided of a three-body problem in the plane, which is the third of a trio recently identified as likely to display a particularly simple time-evolution hence to be amenable to exact treatment. This conjecture, already validated by providing the solution of the first two of these three models, is now completely proven by exhibiting the solution of the third. This finding also demonstrates the conjectured super-Painleve character of certain nonlinear ordinary differential equations, namely, the fact that their general solution is an entire function of the independent variable. (C) 2003 American Institute of Physics MH - France MH - Italy MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000186094300018 SO - Journal of Mathematical Physics 2003 ;44(11):5159-5165 7572 UI - 7037 AU - Calvo-Vargas C AU - Chavez-Michel J AU - Padilla-Rios V AU - Meza-Flores A AU - Troyo-Sanroman R AU - Asmar R AD - Univ Guadalajara, Guadalajara 44430, Jalisco, MexicoSecretaria de Salud, Guadalajara, Jalisco, MexicoInst CardioVasc, Paris, FranceHosp Civil Juan I Menchaca, Guadalajara, Jalisco, Mexico TI - Alterations in arterial rigidity in subjects with dismetabolic syndrome MH - France MH - Mexico|Jalisco PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000185242101106 SO - Diabetologia 2003 ;46():A381-A381 7573 UI - 8557 AU - Calvo-Vargas C AU - Padilla-Rios V AU - Meza-Flores A AU - Vazquez-Linares G AU - Troyo-Sanroman R AU - Cerda AP AU - Asmar R AD - Univ Guadalajara, Hosp Civil Juan 1 Menchaca, Dept Internal Med, Guadalajara, SpainUniv Guadalajara, Hlth Sci Ctr, Div Basic Sci, Ctr Salud Rancho Nuevo,Secretaria Salud Estado Ja, Guadalajara, Jalisco, MexicoInst Cardiovasc, Paris, FranceCalvo-Vargas, C, Pablo Villasenor 387,Col Ladron Guevara, Guadalajara 44650, Jalisco, Mexico TI - Arterial stiffness and blood pressure self-measurement with loaned equipment AB - Background: A cross-sectional study was carried out in 415 hypertensive and normotensive subjects to determine the correlation between loaned self-measurement blood pressure (LSEM), arterial stiffness, and the different factors that contribute to it. Methods: The LSEM model consists of lending a number of sphygmomanometers, property of the clinic, to patients for 3-day periods. Arterial stiffness was evaluated using the carotid-to-femoral pulse wave velocity (PWV), using an automatic apparatus. To determine the importance of each of these factors, a multiple linear regression analysis was carried out. Results: of the total number of patients, 78% were women, the average age was 57 +/- 12 years, 55.8% were hypertensive, and 38.8% were diabetic. The PWV average for the whole group was 12.1 +/- 4.2 m/sec. The correlation coefficients between the PVW and the self-measurements were 0.49 (P < .001) for the pulse pressure, and 0.46 (P < .001) for the systolic blood pressure (BP), respectively. Both represented 13.0 % of the total variation. The diastolic BP obtained by self-measurement and the serum creatinine values also had an effect on the stiffness, with 2.3 % (P = .05) each one. Conclusions: The pulse pressure readings with self-measurement correlate better with the arterial stiffness, compared with the readings taken in the office. (C) 2003 American Journal of Hypertension, Ltd MH - France MH - Mexico|Jalisco MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0895-7061 UR - ISI:000182808800008 L2 - home blood pressure;arterial stiffness;essential hypertension;pulse wave velocity;PULSE-WAVE VELOCITY; AORTIC STIFFNESS; HYPERTENSIVE PATIENTS; INDEPENDENT PREDICTOR; CARDIOVASCULAR RISK; DIABETES-MELLITUS; DISTENSIBILITY; SERUM; AGE SO - American Journal of Hypertension 2003 ;16(5):375-380 7574 UI - 6430 AU - Calvo H AU - Gelbukh A AD - Inst Politecn Nacl, Ctr Res Comp, Mexico City 07738, DF, MexicoChung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South KoreaCalvo, H, Inst Politecn Nacl, Ctr Res Comp, Av Juan Dios Batiz S-N,Esq Av Mendizabal, Mexico City 07738, DF, Mexico TI - Improving prepositional phrase attachment disambiguation using the web as corpus AB - The problem of Prepositional Phrase (PP) attachment disambiguation consists in determining if a PP is part of a noun phrase, as in He sees the room with books, or an argument of a verb, as in He fills the room with books. Volk has proposed two variants of a method that queries an Internet search engine to find the most probable attachment variant. In this paper we apply the latest variant of Volk's method to Spanish with several differences that allow us to attain a better performance close to that of statistical methods using treebanks MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000188097600074 L2 - LANGUAGE SO - Progress in Pattern Recognition, Speech and Image Analysis 2003 ;2905():604-610 7575 UI - 5860 AU - Calvo J AU - Espana O AU - Cabrera JM AU - Prado JM AU - Morales RD AD - Univ Politecn Catalunya, ETSEIB, Dept Ciencia Mat & Ingn Met, Barcelona, Spain. Inst Politecn Nacl, Mexico City, DF, Mexico. Ctr Tecnol Manresa, Mat Lab, Barcelona, Spain TI - Study of the hot ductility and fracture mechanisms of a medium carbon steel AB - The hot ductility behavior of a medium carbon steel (0.48%C, 0.742%Mn, 0.183%Si, 0.028%Al) was studied by tensile tests carried out at strains rates varying from 1(.)10(-4) to 1(.)10(-3) s(-1) and temperatures ranging from 590degreesC to 960degreesC. Before testing, samples were treated at 1200degreesC for 5 minutes. Then they were cooled down to the experimental testing temperature using a cooling rate of 1degreesC/s. Ductility was evaluated by measuring the reduction in area. SEM examination was also performed to characterize the fractographic aspect of the fracture surfaces. A continuos diminution in ductility with decreasing temperatures was observed. This diminution was also sensitive to the strain rates tested. This ductility behavior was promoted by the different deformation modes and fracture mechanisms active and steel phases present. In the austenitic range of temperatures, two behaviors were detected. At high temperature (high ductility zone) deformation occurred by grain sliding without significant void coalescence. In the low ductility zone (low temperature), a clear intergranular fracture (grain decohesion) was apparent. At temperatures below A(3), where austenite transform into ferrite or ferrite plus pearlite, ductility is still low due to strain concentration at the ferrite or pearlite networks. In contrast with low carbon steel, ductility remained low with decreasing temperatures. The typical improvement in ductility of low carbon steels at low temperatures (i.e., in the ferrite regime) was not observed in the present case MH - Mexico|Distrito Federal MH - Spain T3 - ADVANCED STRUCTURAL MATERIALSMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBY71B AV - English IS - 0255-5476 UR - ISI:000189444600007 L2 - fracture mechanisms;hot ductility;medium carbon steel SO - 2003 ;():49-54 7576 UI - 5863 AU - Calzado L AU - Calderon HA AU - Mori T AU - Kisielowski C AU - Clement N AD - ESFM, Dept Ciencia Mat, Mexico City 07300, DF, Mexico. Univ Manchester, Inst Sci & Technol, Manchester Mat Sci Ctr, Manchester M60 1QD, Lancs, England. NCEM, Lawrence Berkeley Nat Lab, Berkeley, CA, USA. CNRS, CEMES, Toulouse, France TI - HREM investigation of coherent y ' particles in Ni based superalloys AB - The mechanism of coarsening of coherent particles in solids is investigated via high-resolution electron microscopy (HREM). Ni based alloys are used for microscopic observation of interfaces between particles (gamma') and matrix (gamma). HREM images of neighboring particles are used to ascertain whether or not such particles have the same translation order domain (TOD), and to measure the distance between them. It is found that the distance between particles is influenced by the relationship between their respective TOD. Particles with different TOD show shorter separation distances MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - USA T3 - ADVANCED STRUCTURAL MATERIALSMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBY71B AV - English IS - 0255-5476 UR - ISI:000189444600020 L2 - coarsening;coherent particles;HREM;Ni-base superalloys SO - 2003 ;():127-132 7577 UI - 6630 AU - Camacho-Ibar VF AU - Carriquiry JD AU - Smith SV AD - Univ Autonoma Baja Calif, Inst Invest Oceanol, Ensenada 22830, Baja California, MexicoUniv Hawaii, Dept Oceanog, Honolulu, HI 96822, USACamacho-Ibar, VF, PMB-099,POB 189003, Coronado, CA 92178, USA TI - Non-conservative P and N fluxes and net ecosystem production in San Quintin Bay, Mexico AB - San Quintin Bay, Mexico, is a hypersaline coastal lagoon where the main external forcing of physical and biogeochemical processes is oceanic. Non-conservative fluxes of inorganic N (DeltaDIN) and P (DeltaDIP), and aspects of net ecosystem metabolism were studied in this lagoon during August 1995, August 1996, and February 1996, by following the LOICZ budgetary modeling approach. The whole-system water exchange time during summer (similar to13 d) was shorter than in winter (similar to26 d) as northwesterly winds enhancing mixing with the ocean are more intense during the spring-summer upwelling season. Whole-bay DeltaDIP values of +0.2 to +0.3 mmol m(-2) d(-1) in August, and < +0.01 mmol m(-2) d(-1) in February indicate that the system is a net source of dissolved inorganic phosphorus (DIP). DIP fluxes from the Bay to the ocean during August are probably balanced by a net import of particulate organic matter between 1,000-1,300 X 10(3) mol C d(-1), equivalent to a net ecosystem production (NEP) between -24 and -31 unnol C m(-2) d(-1). DeltaDIN showed opposite trends in August 1995 and August 1996, with a net import of 13 X 10(3) mol N d(-1) and a net export of 30 X 10(3) mol N d(-1), respectively. However, N fixation minus denitzification ("apparent denitrification") estimates of similar to-4 mmol N m(-2) d(-1) in both periods indicate that San Quintin Bay is a net sink of nitrogen. Results from a 3-box model indicate that during summer Box C, adjacent to the ocean, contributed 70-80% of the excess DIP produced in the whole-system. This observation and high apparent denitrification values of similar to-7 mmol N m(-2) d(-1) at the entrance of the Bay, suggest that the net heterotrophic condition of San Quintin Bay in summer is largely determined by imports of labile phytoplanktonic carbon generated in the adjacent ocean during upwelling. A net flux of organic carbon of 30 X 10(6) mol C yr(-1) was estimated from Box C, adjacent to the ocean, to Box B, locally known as Bahia Falsa, which is the area designated for oyster aquaculture in the lagoon. It is estimated that this net organic carbon supply is almost equivalent to the annual oyster food demand; our estimate is that oyster aquaculture in San Quintin Bay accounts for the vast majority of the net heterotrophy of Bahia Falsa MH - Mexico|Baja California MH - USA PB - LAWRENCE: ESTUARINE RES FEDERATION RP - NOT IN FILE U3 - TC 11 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0160-8347 UR - ISI:000187463000002 L2 - EELGRASS ZOSTERA-MARINA; CHESAPEAKE BAY; COASTAL LAGOON; TOMALES BAY; ESTIMATING DENITRIFICATION; ESTUARINE SEDIMENTS; PLANKTON COMMUNITY; TEMPORAL VARIATION; NITROGEN-FIXATION; ORGANIC-CARBON SO - Estuaries 2003 ;26(5):1220-1237 7578 UI - 8813 AU - Camacho-Ibar VF AU - veytua-Alcazar L AU - Carriquiry JD AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22830, Baja California, MexicoCamacho-Ibar, VF, PMB 099,POB 189003, Coronado, CA 92178, USA TI - Fatty acid reactivities in sediment cores from the northern Gulf of California AB - Fatty acids were determined in three sediment cores from Delfin Basin, Northern,Gulf of California (NGC), Mexico. Steady-state apparent degradation rate constants (P) were determined to assess the reactivity of the total organic carbon (TOC) pool, the total fatty acids (TFA) and selected individual fatty acids. k' values for TFA were higher than those for TOC, indicating that fatty acids are at least 5 times more labile than the organic carbon pool. A comparison of k' values for selected fatty acids indicates that the long-chain terrigenous fatty acids are less labile than the shorter chained fatty acids from autochthonous sources. The general order of reactivity by source was plankton > bacteria > terrestrial. There are at present essentially no inputs of terrigenous material from the Colorado River. Therefore, the lower reactivity of the terrigenous fatty acids in the Delfin Basin probably suggests that the contemporary source of terrestrial organic matter to the NGC is the eroding Colorado River Delta, which contains already degraded organic carbon. In spite of the high primary productivity in the region, k' values for fatty acids from the NGC were low when compared with those from other marine ecosystems. These results suggest that fatty acid diagenesis during particle settling through the water column in the NGC is intense, allowing only for the deposition of relatively refractory organic matter. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0146-6380 UR - ISI:000181894600008 L2 - COASTAL MARINE-SEDIMENTS; COLORADO RIVER DELTA; BULK ORGANIC-MATTER; EARLY DIAGENESIS; OF-CALIFORNIA; LIPID BIOGEOCHEMISTRY; ALIPHATIC-HYDROCARBONS; LAURENTIAN TROUGH; CHESAPEAKE-BAY; BLACK-SEA SO - Organic Geochemistry 2003 ;34(3):425-439 7579 UI - 8690 AU - Camacho AM AU - Atkinson HV AU - Kapranos P AU - Argent BB AD - Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandInst Tecnol Morelia, Morelia 58120, Michoacan, MexicoAtkinson, HV, Univ Leicester, Dept Engn, Univ Rd, Leicester LE1 7RH, Leics, England TI - Thermodynamic predictions of wrought alloy compositions amenable to semi-solid processing AB - Semi-Solid Metal (SSM) Processing or Thixoforming is now a commercially successful manufacturing route producing millions of near net-shape parts per annum for the automotive industry. Currently, effort is directed towards developing wrought performance alloys that are amenable to the thixoforming process. Here, the 7000 series Al-Zn-Mg-Cu system has been studied by means of thermodynamic modelling to identify those compositions likely to be most suitable. The non-equilibrium solidification has been determined by using the Scheil equation and the liquid fraction/temperature relationship obtained. The results show the effect of chemical composition and Zn/Mg ratio on the slope of the liquid fraction/temperature curves. As the Zn + Mg + Cu content increases and the Zn/Mg ratio decreases, the slopes of these curves become less steep. The effect of chemical composition, Zn/Mg ratio and temperature on equilibrium phases is also considered. The phases in equilibrium at a given temperature are strongly affected by the Zn/Mg ratio and Cu content. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Michoacan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6454 UR - ISI:000182342600016 L2 - aluminium alloys;thermodynamics;phase equilibria;semi-solid processing;ALUMINUM; MICROSTRUCTURE; PHASE SO - Acta Materialia 2003 ;51(8):2319-2330 7580 UI - 9145 AU - Camacho J AU - Loa I AU - Cantarero A AU - Syassen K AU - Hernandez-Calderon I AU - Gonzalez L AD - Univ Valencia, Inst Ciencia Mat, E-46071 Valencia, SpainMax Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyUniv Politecn Cartagena, Dept Fis Aplicada, Murcia 30202, SpainIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoCSIC, CNM, PTM, Inst Microelect Madrid, Tres Cantos 28760, Madrid, SpainCantarero, A, Univ Valencia, Inst Ciencia Mat, POB 22085, E-46071 Valencia, Spain TI - Pressure dependence of optical phonons in ZnCdSe alloys AB - We report on resonant Raman scattering measurements under hydrostatic pressure and at low temperature on two ZnxCd1-xSe alloy films, which were grown by different epitaxial techniques on GaAs. This ternary alloy exhibits an intermediate (I) mode between the typical transverse (TO) and longitudinal optical (LO) modes of the zinc-blende structure. The shift of the vibrational frequencies of the three modes with pressure is analyzed. The Gruneisen parameters of these three optical modes are determined. Moreover, overtones of the LO modes as well as TO + nLO and I + nLO zone-center phonon combinations are observed MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000181009000040 L2 - RAMAN-SCATTERING; ZNSE; SPECTROSCOPY; CALIBRATION; ZN1-XCDXSE; MODES; CDSE SO - Physica Status Solidi B-Basic Research 2003 ;235(2):432-436 7581 UI - 6792 AU - Camacho MR AU - Phillipson JD AU - Croft SL AU - Solis PN AU - Marshall SJ AU - Ghazanfar SA AD - Univ London, Sch Pharm, Ctr Pharmacognosy & Phytotherapy, London WC1N 1AX, EnglandUniv London London Sch Hyg & Trop Med, Dept Infect & Trop Med, London WC1E 7HT, EnglandUniv Panama, Fac Farm, CIFLORPAN, Panama City, PanamaSultan Qaboos Univ, Dept Pharmacognosy, Muscat, OmanCamacho, MR, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Ciudad Univ, San Nicolas De Los Garza 66403, Nuevo Leon, Mexico TI - Screening of plant extracts for antiprotozoal and cytotoxic activities AB - Methanolic and aqueous extracts derived from 43 plant species, selected either from ethnobotanical or chemotaxonomical data, were screened for their antiprotozoal activity against Leishmania donovani and Trypanosoma brucei brucei. The cytotoxic activity against KB cells was also determined. Eight extracts had IC50 values of less than 10 mug/ml against Leishmania donovani. The most active was Triclisia patens with an IC50 value of 1.5 mug/ml against Leishmania donovani. Annona purpurea and Alstonia macrophylla had IC50 values below 10 mug/ml against Trypanosoma brucei brucei. Annona purpurea was the most cytotoxic against KB cells. (C) 2003 Published by Elsevier Ireland Ltd MH - United Kingdom MH - Mexico|Nuevo Leon MH - Oman MH - Panama PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000186847000002 L2 - plants;antiprotozoal;cytotoxic activity;Leishmania donovani;Trypanosoma brucei brucei;2-SUBSTITUTED QUINOLINE ALKALOIDS; LEISHMANIA-DONOVANI SO - Journal of Ethnopharmacology 2003 ;89(2-3):185-191 7582 UI - 8507 AU - Camargi-Ricalde SL AU - Dhillion SS AU - Jimenez-Gonzalez C AD - Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Biol & Salud, Dept Biol, Mexico City 09340, DF, MexicoAgr Univ Norway, Dept Biol & Nat Conservat, N-1432 As, NorwayCamargi-Ricalde, SL, Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Biol & Salud, Dept Biol, A Postal 55-535, Mexico City 09340, DF, Mexico TI - Mycorrhizal perennials of the "matorral xerofilo" and the "selva baja caducifolia" communities in the semiarid Tehuacan-Cuicatlan Valley, Mexico AB - We investigated the mycorrhizal status of perennial xeric plant species occurring in the "matorral xerofilo" (arid tropical scrub) and the ecotone of the "selva baja caducifolia" (tropical deciduous forest) communities in the semiarid valley of Tehuacan-Cuicatlan, south-central Mexico. The perennial species examined are dominant/codominant elements within the "matorral xerofilo" and the "selva baja caducifolia", both endangered communities in the Biosphere Reserve Tehuacan-Cuicatlan Valley. Of the 50 sampled species, 45 were mycorrhizal. To our knowledge, we report arbuscular mycorrhizae (AM) for the first time in 37 species, of which 21 are endemic to Mexico and nine are endemic to the Valley. We also report AM for the first time in three genera, Buddleja, Hechtia and Zomia, and in one plant family, Buddlejaceae. Beaucamea gracilis, a threatened species, and Mimosa purpusii, a potentially rare species, are both mycorrhizal. This is the first study of the mycorrhizal status of plant species within the Valley MH - Mexico|Distrito Federal MH - Norway PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Mycology U5 - J;Article AV - English IS - 0940-6360 UR - ISI:000182727900003 L2 - arbuscular mycorrhizae;arid;conservation;endemics;restoration;ARBUSCULAR MYCORRHIZAE; ARID ECOSYSTEMS; WATER RELATIONS; DESERT; PLANTS; FUNGI; ASSOCIATIONS; ESTABLISHMENT; BIODIVERSITY; CALIFORNIA SO - Mycorrhiza 2003 ;13(2):77-83 7583 UI - 7957 AU - Camargo-Ricalde SL AU - Dhillion SS AD - Agr Univ Norway, Dept Biol & Nat Conservat, N-1432 As, NorwayUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Biol & Salud, Dept Biol, Mexico City 09340, DF, MexicoCamargo-Ricalde, SL, Agr Univ Norway, Dept Biol & Nat Conservat, POB 5014, N-1432 As, Norway TI - Endemic Mimosa species can serve as mycorrhizal "resource islands" within semiarid communities of the Tehuacan-Cuicatlan Valley, Mexico AB - This paper explores if Mimosa species (Fabaceae-Mimosoideae) can serve as arbuscular mycorrhizal (AM) and nutrient 'resource islands' in six plant communities in the semiarid valley of Tehuacan-Cuicatlan, Mexico. Spatial heterogeneity related to the occurrence of Mimosa species results in temporal differences in AM-fungal spore numbers and soil nutrients. A higher number of AM-fungal spores were found in the soil below the canopies of six endemic Mimosa species than in the soil from non-vegetated areas. For four species, Mimosa adenantheroides, Mimosa calcicola, Mimosa luisana and Mimosa polyantha, the soil below their canopies had more AM-fungal spores than the soil in non-vegetated areas during the wet season than during the dry season. Two species, Mimosa lacerata and Mimosa texana var. filipes, however, had more spores under their canopies during the dry season than during the wet season. Although physical differences are present within and between sites, in general the soil below the canopies of Mimosa species had significantly higher nutrient levels than the soil from non-vegetated areas. Mimosa species thus form 'resource islands' that are not only rich in nutrients but also in mycorrhizal propagules. Mimosa species can serve as mycorrhizal 'resource islands' by directly affecting AM-fungal spore dynamics and/or by serving as spore-traps. A range of plants associated with Mimosa species may benefit from the higher number of AM propagules. We believe that the use of Mimosa resource islands as an option for biodiversity conservation and for land restoration ought to be considered in the Valley MH - Mexico|Distrito Federal MH - Norway PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Mycology U5 - J;Article AV - English IS - 0940-6360 UR - ISI:000184017500002 L2 - arbuscular-mycorrhizal fungi;conservation;resource island;seasonality;semiarid;VESICULAR-ARBUSCULAR MYCORRHIZAS; CACTUS NEOBUXBAUMIA-TETETZO; ARID ECOSYSTEMS; WATER RELATIONS; FUNGI; SOIL; DESERT; PLANT; POPULATIONS; ESTABLISHMENT SO - Mycorrhiza 2003 ;13(3):129-136 7584 UI - 6491 AU - Campillo A AU - Olivares J AD - Univ Valladolid, Dept Algebra Geometria & Topol, E-47005 Valladolid, SpainCtr Invest Matemat, Guanajuato 36000, MexicoCampillo, A, Univ Valladolid, Dept Algebra Geometria & Topol, E-47005 Valladolid, Spain TI - On sections with isolated singularities of twisted bundles and applications to foliations by curves AB - Let E --> M be a holomorphic rank n vector bundle over a compact Kahler manifold of dimension n, having a positive (or ample) line bundle L --> M and consider a global section s, with isolated singularities, of the twisted bundle E circle times L-circle timesr, where r is an integer. We prove that if r is large enough, then s is uniquely determined, up to a global endomorphism of the bundle E, by its subscheme of singular points (which we call the singular subscheme of s). If in particular E is simple, then s is uniquely determined, up to a scalar factor, by its singular subscheme. We recall that the last statement holds in case s is a holomorphic foliation by curves, with isolated singularities, on a projective manifold M with stable tangent bundle, so it holds in particular if M is a compact irreducible Hermitian symmetric space or a Calabi-Yau manifold. If L --> P-n is the hyperplane bundle, we show that it holds for every r greater than or equal to 1 MH - Mexico|Guanajuato MH - Spain PB - CAMBRIDGE: INT PRESS BOSTON RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1073-2780 UR - ISI:000188002600008 L2 - HOMOGENEOUS VECTOR-BUNDLES; ALGEBRAIC-SURFACES; STABILITY; MANIFOLDS SO - Mathematical Research Letters 2003 ;10(5-6):651-658 7585 UI - 8751 AU - Campillo OA AU - Valdes A AD - IPN, Ctr Interdisciplinario Ciencias Marinas, Dept Pesquerias & Biol Marina, La Paz 23090, Beja California, MexicoNat Hist Museum Los Angeles, Los Angeles, CA 90007, USACampillo, OA, IPN, Ctr Interdisciplinario Ciencias Marinas, Dept Pesquerias & Biol Marina, S-N Colonia Palo Santa Rita, La Paz 23090, Beja California, Mexico TI - A new species of Cuthona Alder & Hancock, 1855, from the Gulf of California, Mexico (Opisthobranchia : Nudibranchia : Tergipedidae) MH - Mexico|Baja California Sur MH - USA PB - SANTA BARBARA: CALIF MALACOZOOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0042-3211 UR - ISI:000182051100008 SO - Veliger 2003 ;46(2):179-182 7586 UI - 8126 AU - Campos-Delgado DU AU - Schuermans BBH AU - Zhou KM AU - Paschereit CO AU - Gallestey EA AU - Poncet A AD - Louisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USAAlstom Power, CH-5405 Baden, SwitzerlandAsea Brown Boveri Corp Res, CH-5405 Baden, SwitzerlandCampos-Delgado, DU, Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78290, Mexico TI - Thermoacoustic instabilities: Modeling and control AB - The goal of this study was twofold. First, modeling strategies were proposed to characterize the dynamics driving the thermoacoustic instabilities in a swirl-stabilized premixed burner. Second, this model was used to synthesize controllers in order to apply active control strategies to suppress this phenomenon. An experimental combustor model based on acoustic properties of the combustion chamber was derived. This model separates the combustor into a four-block linear system. Acoustic-and fuel modulations; were used to obtain the frequency response of each block representing a part of the combustor test-rig. Using this linear representation H. disturbance rejection and, H. loop-shaping controllers were computed and tested for a set of different working conditions of the chamber for the robustness of the resulting controllers. Standard phase-delay control was used as baseline control strategy to judge the performance of the proposed controllers. Experimental results show the advantages of these model-based control strategies to suppress thermbacoustic instabilities in the test-rig MH - Mexico|San Luis Potosi MH - Switzerland MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000183821700001 L2 - combustion control;experimental modeling;H-infinity design;robust control;thermoacoustic instabilities;ACTIVE CONTROL; COMBUSTION INSTABILITIES; KINEMATIC MODEL; DUCTED FLAME; REHEAT BUZZ; OSCILLATIONS SO - Ieee Transactions on Control Systems Technology 2003 ;11(4):429-447 7587 UI - 8278 AU - Campos-Delgado DU AU - Zhou KM AD - Louisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USAZona Univ, Fac Ciencias, UASLP, Mexico City 78290, DF, MexicoZhou, KM, Louisiana State Univ, Dept Elect & Comp Engn, 102 S Campus Dr, Baton Rouge, LA 70803 USA TI - A parametric optimization approach to H-infinity and H-2 strong stabilization AB - This paper presents an approach for designing stable MIMO H-infinity and H-2 controllers by directly computing the norm-constrained stable transfer matrices Q in the H-infinity and H-2 suboptimal controller parameterizations. This is done by first converting the H-2 and H-infinity strong stabilization problems into some nonlinear unconstrained optimization problems through explicit parameterization of the norm-constrained Q's for any fixed order. Then, a two-stage numerical search is carried out by using a combination of a genetic algorithm and a quasi-Newton algorithm in order to reach an optimal solution. The effectiveness of the proposed algorithms is illustrated through some benchmark numerical examples. (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000183376400007 L2 - strong stabilization;H-infinity control;H-2 control;genetic algorithm;MIMO SYSTEMS; CONTROLLERS SO - Automatica 2003 ;39(7):1205-1211 7588 UI - 8466 AU - Campos-Delgado DU AU - Zhou K AD - Univ Autonoma San Luis Potosi, Fac Ciencias, Mexico City, DF, MexicoLouisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USACampos-Delgado, DU, Univ Autonoma San Luis Potosi, Fac Ciencias, Mexico City, DF, Mexico TI - Mixed L-1/H-2/H-infinity control design: numerical optimization approaches AB - This paper presents some new approaches to mixed performance control problems of linear systems. The design techniques proposed in this paper are based on numerical search of the norm bounded stable transfer matrix Q in the H-infinity and H-2 suboptimal controller parameterizations so that the additional performance specifications are satisfied. The design problems are then converted to some finite dimensional non-linear unconstrained optimization problems by explicitly parameterizing the H-infinity or H-2 norm bounded stable transfer matrix Q for any fixed order. Finally, some two-stage optimization algorithms are applied to find the optimal parameters. Numerical examples have shown significant performance improvements of the proposed algorithms over those in the existing literature MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000182887200004 L2 - MULTIOBJECTIVE H-2/H-INFINITY CONTROL; INFINITY PERFORMANCE-OBJECTIVES; TIME-DOMAIN CONSTRAINTS; OUTPUT-FEEDBACK CONTROL; CONVEX-OPTIMIZATION; ZERO INTERPOLATION; SYSTEMS; H-2; H2 SO - International Journal of Control 2003 ;76(7):687-697 7589 UI - 8469 AU - Campos-Delgado DU AU - Zhou KM AD - Zona Univ, Fac Ciencias, UASLP, San Luis Potosi 78290, MexicoLouisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USACampos-Delgado, DU, Zona Univ, Fac Ciencias, UASLP, San Luis Potosi 78290, Mexico TI - Reconfigurable fault-tolerant control using GIMC structure AB - In this note, a fault-tolerant control strategy is proposed from a robust control perspective by applying the recently introduced generalized internal mode control architecture. This fault-tolerant control design consists of two parts: a nominal performance controller and a robustness controller, and works in such way that when a sensor failure is detected, the controller. structure is reconfigured by adding a robustness loop to compensate the fault. This note shows how to design such controllers for a single-input two-output gyroscope system so that the performance with the nominal controller may be maintained in the case of sensor failure and/or model uncertainties MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 8 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000182870800015 L2 - H-infinity control;fault-tolerant control;gyroscope;robust control;DYNAMIC-SYSTEMS; FREQUENCY-DOMAIN; H-INFINITY; DESIGN SO - Ieee Transactions on Automatic Control 2003 ;48(5):832-838 7590 UI - 6457 AU - Camprubi A AU - Melgarejo JC AU - Proenza JA AU - Costa F AU - Bosch J AU - Estrada A AU - Borell F AU - Yushkin NP AU - Andreichev VL AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Santiago de Queretaro 76230, MexicoUniv Barcelona, Fac Geol, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, Catalonia, SpainRuhr Univ Bochum, Inst Geol Mineral & Geophys, D-44780 Bochum, GermanyMuseu Gava, Gava 08850, Catalonia, SpainRussian Acad Sci, Komi Sci Ctr, Inst Geol, Syktyvkar 167610, Komi Rep, RussiaCamprubi, A, Univ Nacl Autonoma Mexico, Ctr Geociencias, Carretera Qro SLP Km 15-5,Campus Juriquilla, Santiago de Queretaro 76230, Mexico TI - Mining and geological knowledge during the Neolithic: a geological study on the variscite mines at Gava, Catalonia AB - The Gava Neolithic Mining Complex (GNMC) near Barcelona was active during the Neolithic age, since ca. 6000 BP until about 700 years after. These mines show up to five different underground mining levels, developed as galleries and chambers, communicated through pits, drawing a complex network with a total known length of over 1000 m. These are some of the oldest underground mines in Europe but, contrary to the rest of the mine workings known of the same epoch, this is the only mining complex reported to date whose aim was not mining for conventional substances for the epoch such as chert, ochre or copper. The main aim of the GNMC was variscite, a green phosphate mineral similar to turquoise that can be easily cut and polished to make ornaments such as necklaces or bracelets. This paper is focused mainly on the geological mapping and examination in surface and underground exposures of the different phosphate mineralization types (stratabound and veins) and other relevant geological features such as discordances, thrusts, faults, and folds MH - Germany MH - Mexico|Queretaro MH - Russia MH - Spain PB - BEIJING: INT UNION GEOLOGICAL SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0705-3797 UR - ISI:000188189700005 SO - Episodes 2003 ;26(4):295-301 7591 UI - 7782 AU - Camprubi A AU - Ferrari L AU - Cosca MA AU - Cardellach E AU - Canals A AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Santiago De Queretaro 76230, Qro, MexicoUniv Lausanne, Inst Mineral & Geochim, CH-1015 Lausanne, SwitzerlandUniv Autonoma Barcelona, Dept Geol, E-08193 Barcelona, SpainUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, SpainCamprubi, A, Univ Nacl Autonoma Mexico, Ctr Geociencias, Carretera Queretaro San Luis Potosi Km 15-5,Campu, Santiago De Queretaro 76230, Qro, Mexico TI - Ages of epithermal deposits in Mexico: Regional significance and links with the evolution of tertiary volcanism AB - We present an analysis leading to a new space-time classification of the Mexican epithermal deposits, based on new data and interpretations from seven deposits in central Mexico, and a new age for the La Guitarra deposit, Temascaltepec district. From the latter, adularia from a barren stage of mineralization and from quartz bands of the main ore stage, together with orthoclase phenocrysts from host monzogranites (with a known late Laramide age) were analyzed by the Ar-40/Ar-39 method. The ages obtained from adularia samples are 32.9 +/- 0.1 Ma and 33.3 +/- 0.1 Ma, corresponding to the middle part of Lower Oligocene. These ages are slightly younger than that of the ignimbrite succession exposed next to the study area, and they suggest that the deposit is related to the crystallization of comagmatic intrusive rocks. Contrary to previous assumptions of a Miocene age for several epithermal deposits in southern Mexico, the ages from La Guitarra show that, south of the Trans-Mexican volcanic belt, these deposits may be Oligocene or older. In addition, the interpretation of a genetic link between intrusive rocks and epithermal mineralization is consistent with previous work on fluid geochemistry of the deposit. To evaluate the obtained ages in a regional context, we analyzed the geographic distribution and age of Tertiary epithermal deposits in central Mexico. Our study shows that mineral deposits coincide with the main volcanic pulses of the Sierra Madre Occidental. The distribution of epithermal deposits can be thus divided into three main groups: (1) between similar to48 and similar to40 Ma, (2) between similar to36 and similar to27 Ma, and (3) between similar to23 and similar to18 Ma. Within the first group are the Batopilas and Topia deposits that record the oldest ages found for epithermal deposits in Mexico. Deposits of this age are hosted by the Lower Volcanic Supergroup of the Sierra Madre Occidental, and are related to the Laramide magmatism of the Sierra Madre Occidental. Many of the epithermal deposits in Mexico occur within the second time span in a northwest-southeast belt from Chihuahua to the Mexico and Guerrero states. These deposits are related to the main episode of ignimbrite flare-up of the Sierra Madre Occidental. The third group includes the Bolanos, San Martin de Bolanos, and Pachuca-Real del Monte deposits, plus, possibly, seven other epithermal deposits analyzed in this work. These deposits are related to the last ignimbrite flare up of the Sierra Madre Occidental with a general west-northwest-east-southeast distribution, recently documented in the southern Sierra Madre Occidental MH - Mexico|Queretaro MH - Spain MH - Switzerland PB - LITTLETON: ECONOMIC GEOLOGY PUBL CO RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0361-0128 UR - ISI:000184588400010 L2 - FLUID INCLUSION CHARACTERISTICS; HYDROTHERMAL ACTIVITY; MINING DISTRICT; VEIN MINERALIZATION; SILVER DISTRICT; ARC-MAGMATISM; GOLD VEINS; K-AR; SIERRA; EXTENSION SO - Economic Geology and the Bulletin of the Society of Economic Geologists 2003 ;98(5):1029-1037 7592 UI - 8578 AU - Camprubi A AU - Norman DI AU - Chomiak BA AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Santiago De Queretaro 76230, Queretaro, MexicoNew Mexico Inst Min & Technol, Dept Earth & Environm Sci, Socorro, NM 87801, USACamprubi, A, Univ Nacl Autonoma Mexico, Ctr Geociencias, Santiago De Queretaro 76230, Queretaro, Mexico TI - Evidence for fluid sources by quadrupole mass spectrometry in the La Guitarra Ag-Au epithermal deposit, Temascaltepec district, Mexico AB - The Temascaltepec district is formed by several sets of Ag-Au bearing low-sulfidation epithermal veins, including the La Guitarra vein system. The vein stratigraphy of the La Guitarra deposit is defined by three mineralization stages. Samples from all stages were analyzed by quadrupole mass spectrometry (QMS) to quantify the volatiles contained in fluid inclusions. The results show the occurrence of three fluid types in most mineralization stages: magmatic, crustal meteoric, and surficial meteoric fluids, supporting the conclusions from previous fluid inclusion and stable isotope studies. All the analyzed samples display N-2/Ar ratios (0 to 2526) indicating a general mixing between andesitic or rhyolitic and meteoric fluids. The strongest magmatic fluid contributions were found in the metallic associations of the deposit (stages I, IIB and III). (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800106 L2 - Temascaltepec;epithermal;QMS analyses;volatile composition;fluid sources SO - Journal of Geochemical Exploration 2003 ;78-9():593-599 7593 UI - 7124 AU - Canales-Ibarra C AU - Magarinos G AU - Olsoff-Pagovich P AU - Ortiz-Hidalgo C AD - Amer British Cowdray Hosp, Dept Pathol, Mexico City 01120, DF, MexicoBritish Hosp, Dept Pathol, Buenos Aires, DF, ArgentinaABC Hosp, Dept Plast Surg, Mexico City, DF, MexicoUniv Panamer, Sch Med, Dept Histol, Mexico City, DF, MexicoOrtiz-Hidalgo, C, Amer British Cowdray Hosp, Dept Pathol, Calle Sur 136 116 Esq Observ, Mexico City 01120, DF, Mexico TI - Cutaneous sclerosing perineurioma of the digits: an uncommon soft-tissue neoplasm. Report of two cases with immunohistochemical analysis AB - Background: Cutaneous sclerosing perineurioma is a recently characterized, uncommon tumor composed of perineurial cells, which exhibits immunoreactivity for epithelial membrane antigen (EMA). These lesions occur preferentially in children and young adults and usually develop as dermal or subcutaneous nodules in the hands or palms. Methods: We report two cases of cutaneous sclerosing perineurioma in young patients without stigmata of neurofibromatosis. Histologically, these lesions were well-circumscribed masses and were characterized by a variable number of epithelioid and spindle cells with wavy nuclei end elongated cytoplasmic processes embedded in a dense collagen stroma. Results: These cells showed focal whorling formation, demonstrated robust immunoreactivity for EMA and CD99, and were uniformly negative for S-100 protein, actin (HHF-35), CD34, cytokeratin AE1-3, and CD57. Conclusion: We comment on the differential diagnosis of fibrous cutaneous lesions based on immunohistochemistry MH - Argentina MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 7 U4 - Dermatology;Pathology U5 - J;Article AV - English IS - 0303-6987 UR - ISI:000185473200009 L2 - NERVE SHEATH TUMOR; PERIPHERAL-NERVE; SCLEROTIC FIBROMA; CELL TUMOR; CHROMOSOME-22; NEUROFIBROMA SO - Journal of Cutaneous Pathology 2003 ;30(9):577-581 7594 UI - 9534 AU - Cancino-Badias L AU - Reyes RE AU - Nosti R AU - Perez I AU - Dorado V AU - Caballero S AU - Soria A AU - Camacho-Carranza R AU - Escobar D AU - Espinosa-Aguirre JJ AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoCIBIOMED, ICBP Victoria Giron, Havana, CubaInst Nacl Pediat, Mexico City 04530, DF, MexicoEspinosa-Aguirre, JJ, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Apartado Postal 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Modulation of rat liver citochrome P450 by protein restriction assessed by biochemical and bacterial mutagenicity methods AB - Protein restriction (PR) significantly inhibits spontaneous and chemical carcinogenesis. Several factors seem to be involved in this effect, including a decrease in body weight, cellular proliferation and DNA damage and an increase in antioxidant defenses. The current study was designed to determine modifications in some hepatic cytochromes P450 (CYPs) due to a hypoproteic diet and to investigate its implications on chemical mutagenesis. Western blot analysis showed decreases of 73, 40 and 74% in CYP1A, CYP2B and CYP2E1 protein concentrations in hepatic microsomes from animals fed a protein-restricted (6% protein) diet for 6 weeks in comparison with microsomes from rats fed a 24% protein diet during the same period. In the same way, low protein fed animals showed a 3.5-fold decrease in hepatic CYP1A1-associated ethoxyresorufin O-deethylase activity, a 6-fold decrease in CYP1A2-associated methoxyresorufin O-demethylase activity, a 1.7-fold decrease in CYP2B1-associated penthoxyresorufin O-dealkylase activity, a 9-fold decrease in CYP2B2-associated benzyloxyresorufin O-dealkylase and, finally, a 3.4-fold decrease in CYP2E1-associated 4-nitrophenol hydroxylase activity. As a result of decreased CYP hepatic protein concentrations and enzymatic activities, liver S9 from rats fed a hypoproteic diet was less efficient in activating promutagens than S9 prepared from rats fed a 24% protein diet in the Ames test. Mutagenic potency obtained with protein-restricted S9 was reduced 25-fold for 2-aminoanthracene, 1.5-fold for N-nitrosodipropylamine, 12.5-fold for N-nitrosodibutylamine, 2-fold for cyclophosphamide and N-nitrosopyrrolidine and 71-fold for N-nitrosodimethylamine. However, the mutagenic potency of benzo[a]pyrene was the same (4 revertants/mug) with S9 derived from rats fed either a 6 or 24% protein diet MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0267-8357 UR - ISI:000179860700015 L2 - CALORIE MALNUTRITION; CYTOCHROME P450S; DIETARY-PROTEIN; ACTIVATION; EXPRESSION; METABOLISM; INDUCTION; CHILDREN; CELLS; 3-METHYLCHOLANTHRENE SO - Mutagenesis 2003 ;18(1):95-100 7595 UI - 7355 AU - Candel A AU - Quiroga-Barranco R AD - Calif State Univ Northridge, Dept Math, Northridge, CA 91330, USACINVESTAV, IPN, Dept Matemat, Mexico City 07300, DF, MexicoCandel, A, Calif State Univ Northridge, Dept Math, Northridge, CA 91330 USA TI - Gromov's centralizer theorem AB - We study the properties of rigid geometric structures and their relation with those of finite type. The main result proves that for a noncompact simple Lie group G acting analytically on a manifold M preserving a finite volume and either a connection or a geometric structure of finite type there is a nontrivial space of globally defined Killing vector fields on the universal cover (M) over tilde that centralize the action of G. Several appplications of this result are provided MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Mathematics U5 - J;Article AV - English IS - 0046-5755 UR - ISI:000185537900009 L2 - simple Lie groups;finite type structures;analytic actions;FUNDAMENTAL-GROUPS; MANIFOLDS SO - Geometriae Dedicata 2003 ;100(1):123-155 7596 UI - 6552 AU - Candela J AU - Tanahara S AU - Crepon M AU - Barnier B AU - Sheinbaum J AD - CICESE, Dept Oceanog Fis, Ensenada, Baja California, MexicoCNRS, LEGI, F-38041 Grenoble 9, FranceUniv Paris 06, LODYC, F-75005 Paris, FranceCandela, J, CICESE, Dept Oceanog Fis, Apdo Postal 2732, Ensenada, Baja California, Mexico TI - Yucatan Channel flow: Observations versus CLIPPER ATL6 and MERCATOR PAM models AB - [1] The statistical properties of the flow structure in the Yucatan Channel's main section based on 2 years of continuous observations (August 1999 to June 2001) are compared with those simulated by the Ocean Parallelise (OPA) primitive equation model in two different configurations: the ATL6 configuration from the CLIPPER project (the whole Atlantic domain with a 1/6degrees resolution), and the Prototype Atlantique Mediterranee (PAM) configuration from the MERCATOR project ( the North Atlantic domain with 1/12degrees resolution). While the observed 2-year mean transport into the Gulf of Mexico is 23.06 Sv, ATL6 has a 5-year mean of 27.49 Sv and PAM has a 3-year mean of 29.06 Sv. Apart from this discrepancy in the mean transport both simulations are able to reproduce well, in structure and magnitude, details of the mean current and its variability. Features like the Yucatan Current core and the deep countercurrents in the Yucatan and Cuban sides are both well reproduced, as is the presence of a minimum surface current variability at the center of the channel. The two principal empirical modes of current variability, which are related to the passage of eddies through the channel, are also reproduced by the simulations. The observed and simulated transports above and below the 6degreesC isotherm show no coherency at any frequency except for a significant coherent peak at a period around 20 days, which we interpret as a first baroclinic Kelvin mode between the two layers. As in the observations, the shedding of eddies by the Loop Current in the simulations is preceded by periods of diminished negative horizontal vorticity flux into the Gulf of Mexico MH - France MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 8 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000187865700002 L2 - exchange flows;Yucatan Channel;currents;boundary currents;current variability;GULF-OF-MEXICO; LOOP CURRENT; CARIBBEAN SEA; NORTH-ATLANTIC; OCEAN; CIRCULATION; VARIABILITY; FREQUENCY; EDDIES; FLUX SO - Journal of Geophysical Research-Oceans 2003 ;108(C12): 7597 UI - 7545 AU - Canet C AU - Prol-Ledesma RM AU - Melgarejo JC AU - Reyes A AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, Barcelona, SpainInst Geol & Nucl Sci, Lower Hutt, New ZealandCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Methane-related carbonates formed at submarine hydrothermal springs: a new setting for microbially-derived carbonates? AB - Numerous small calcite mounds, up to 2.5 m in diameter and 0.75 m in height, accompanied by Ba, Hg and TI mineralisation, occur in shallow submarine hydrothermal vents on the sea bottom, at 10 m depth, near Punta Mita, on the western coast of Mexico. The hydrothermal activity consists in water and gas (mainly nitrogen and methane) venting at 85 degreesC, through a 100-m-long fissure hosted in basaltic rocks and partially covered by a thin layer of unconsolidated detrital sediments. The mounds consist of travertine-like calcite aggregates that develop around the main submarine hot springs amidst a hydrothermally altered basaltic host rock. Two main calcite generations are texturally recognisable: the first generation shows a radial-fibrous texture; the second is fine-grained calcite, which cements detrital grains and fills the pore spaces. The delta(13)C analyses of calcite reveal a strong depletion in C-13, with values as low as -39.2parts per thousand (Vienna PeeDee Belemnite), which suggest that microbial communities may have induced calcite precipitation through microbial methane oxidation. Barite, sulphides (mainly pyrite and cinnabar) and phosphates (carbonate-hydroxylapatite) are also present in the mounds in lower concentrations and form by direct precipitation from the hydrothermal fluid. The Punta Mita hydrothermal carbonate mounds represent a potentially novel environment for microbially induced carbonate mineralisation, which is characterised by high temperatures not encountered in areas of cold seep carbonate formation. Stable isotope results suggest that microorganisms responsible for the oxidation of methane may be present and active at temperatures near 85 degreesC at the Punta Mita vents. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - New Zealand MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Geosciences, Multidisciplinary;Oceanography U5 - J;Article AV - English IS - 0025-3227 UR - ISI:000185176400003 L2 - hydrothermal coastal vents;calcite;methane;Mexico;carbon isotopes;AUTHIGENIC CARBONATES; DEPOSITS; VENTS; CALIFORNIA; LAKE; GEOCHEMISTRY; CONSTRAINTS; SEAWATER; MEXICO; MARGIN SO - Marine Geology 2003 ;199(3-4):245-261 7598 UI - 7933 AU - Canet C AU - Alfonso P AU - Melgarejo JC AU - Jorge S AD - Univ Nacl Autonoma Mexico, Inst Geofis, Dept Recursos Nat, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, Catalonia, SpainFac Humanidades & Educ, Dept Didact Especif, E-09001 Burgos, SpainCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Dept Recursos Nat, Mexico City 04510, DF, Mexico TI - V-rich minerals in contact-metamorphosed Silurian sedex deposits in the Poblet area, southwestern Catalonia, Spain AB - The Lower Llandoverian metasedimentary rocks of the Prades Mountains, southwestern Catalonia, Spain, consist of interstratified anorthite-rich beds, chert beds, phosphate beds, sulfide-rich black shale (with mainly pyrrhotite and minor chalcopyrite), massive sulfide lenses and calc-silicate beds. These metasedimentary rocks are anomalously enriched in V and Cr, and have disseminated minerals of precious metals: mainly sperrylite and palladian lollingite. The V- and Cr-rich associations are the result of an isochemical metamorphism of V- and Cr-rich protoliths. The contact metamorphism of V-rich shale produced metapelitic hornfels with V-rich aluminosilicates and V-Cr oxides. The occurrence of V oxides in apparent equilibrium with V-rich silicates suggests a limit for the V and Cr contents in these aluminosilicates at the conditions of thermal metamorphism. On the other hand, metamorphism of anorthite- and V-,Cr-rich sedimentary rocks produced V- and Cr-rich silicates, such as goldmanite, V-rich amphiboles, V-rich titanite and V-rich allanite MH - Mexico|Distrito Federal MH - Spain PB - OTTAWA: MINERALOGICAL ASSOC CANADA RP - NOT IN FILE U3 - TC 7 U4 - Mineralogy U5 - J;Article AV - English IS - 0008-4476 UR - ISI:000184282400001 L2 - vanadium oxides;vanadium silicates;chromium;sedex;black shale;Silurian;contact metamorphism;Catalonia;Spain;HEMLO GOLD DEPOSIT; PYRITE DEPOSIT; CHROMIAN MUSCOVITE; WESTERN-AUSTRALIA; BARIAN FELDSPAR; ALTERATION ZONE; CENTRAL SWEDEN; ZN-PB; ROCKS; CR SO - Canadian Mineralogist 2003 ;41():561-579 7599 UI - 7934 AU - Canet C AU - Alfonso P AU - Melgarejo JC AU - Jorge S AD - Univ Nacl Autonoma Mexico, Inst Geofis, Dept Recursos Nat, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, Catalonia, SpainFac Humanidades & Educ, Dept Didact Especif, E-09001 Burgos, SpainCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Dept Recursos Nat, Mexico City 04510, DF, Mexico TI - PGE-bearing minerals in Silurian sedex deposits in the Poblet area, southwestern Catalonia, Spain AB - The Lower Llandoverian metasedimentary series of the Prades Mountains, in southwestern Catalonia, Spain, consists of interbedded massive feldspar beds, composed of almost pure anorthite, with chert, phosphate beds, sulfide-rich black shale, massive sulfides and minor calc-silicate beds. The sulfides mainly consist of pyrrhotite with minor chalcopyrite. The metasedimentary rocks are anomalously V- and Cr-rich and contain disseminated minerals bearing precious metals, e.g., sperrylite and palladian lollingite. On the basis of the geological setting of ore formation and the textural relationships among the minerals, a sedex model is proposed for the primary origin of these deposits and occurrences. However, textural patterns and mineral compositions were modified during several episodes. Firstly, Hercynian deformation and associated regional low-grade metamorphism produced cleavage and small-scale veining in the primary associations. Later, contact metamorphism related to Late Hercynian intrusions annealed the mineral associations. A sulfidation stage of mineralization caused replacement of Pd-bearing lollingite by arsenopyrite. During this process, the arsenopyrite structure was unable to accommodate such high Pd contents and, consequently, Pd was precipitated as PdAs2 and scarce small grains of native Pd, disseminated along the lollingite - arsenopyrite contact, in association with argentian gold, and tellurides and selenides of An, Ag, Bi and Pb MH - Mexico|Distrito Federal MH - Spain PB - OTTAWA: MINERALOGICAL ASSOC CANADA RP - NOT IN FILE U3 - TC 3 U4 - Mineralogy U5 - J;Article AV - English IS - 0008-4476 UR - ISI:000184282400002 L2 - lollingite;palladium;sperrylite;gold;tellurides;selenides;sedex;black shale;metamorphism;Catalonia;Spain;RICH BLACK SHALES; CENTRAL PYRENEES; BOHEMIAN MASSIF; MINERALIZATIONS; AU; GEOCHEMISTRY; AUSTRALIA; ORIGIN; GOLD; PB SO - Canadian Mineralogist 2003 ;41():581-595 7600 UI - 8575 AU - Canet C AU - Alfonso P AU - Melgarejo JC AU - Fallick AE AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, SpainSUERC, Isotope Geosci Unit, Glasgow G75 0QF, Lanark, ScotlandCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ,Del Coyoacan, Mexico City 04510, DF, Mexico TI - Origin of the mineralizing fluids from the carboniferous sedex deposits of L'Alforja (SW Catalonian Coastal Ranges, Spain) AB - Fluid inclusions were studied in stratiform ore deposits hosted in Namurian sedimentary series near L'Alforja (southernmost part of the Catalonian Coastal Ranges, NE Spain). Primary fluid inclusions in quartz crystals from L'Alforja ore bodies are two-phase (L-V), with salinity between 1.1 and 18.0 wt.% NaCl eq. and homogenization temperature mainly in the range of 220260 degreesC. deltaD values analyzed in chlorite range between - 63 parts per thousand and - 33 parts per thousand, and 6180 values range between + 2.7 parts per thousand and + 6.8 parts per thousand in chlorite, and from + 8.6 parts per thousand to + 10.7 parts per thousand in quartz. Fluid inclusions and oxygen-hydrogen stable isotopes indicate that the mineralilzing fluid of L'Alforja was mainly seawater. The hydrothermal fluid had lower density than seawater, so producing buoyant piumes on debouching at the seafloor, and the, metals precipitated with the decrease of temperature. Hydrothermal fluids related to late-Hercynian porphyritic granite dynes produced local recrystallization of the ores, as well as a younger generation of 4 high saline fluid inclusions, and locally caused isotopic reequilibration. (C) 2003 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800094 L2 - sedex;fluid inclusions;Catalonian Coastal Ranges;carboniferous basin;INCLUSION; ISOTOPE; FIELD SO - Journal of Geochemical Exploration 2003 ;78-9():513-517 7601 UI - 8208 AU - Canfield LM AU - Clandinin MT AU - Davies DP AU - Fernandez MC AU - Jackson J AU - Hawkes J AU - Goldman WJ AU - Pramuk K AU - Reyes H AU - Sablan B AU - Sonobe T AU - Bo X AD - Univ Arizona, Dept Biochem & Mol Biophys, Tucson, AZ 85724, USAUniv Alberta, Edmonton, AB, CanadaUniv Wales Coll Med, Cardiff CF4 4XN, S Glam, WalesHosp Barros Luco, Santiago, ChileWyeth Nutr, Philadelphia, PA, USAFlinders Med Ctr, Adelaide, SA, AustraliaClin Pediat Pigui, Mexico City, DF, MexicoPhilippine Gen Hosp, Manila, PhilippinesJapanese Red Cross Med Ctr, Tokyo, JapanCanfield, LM, Univ Arizona, Dept Biochem & Mol Biophys, Tucson, AZ 85724 USA TI - Multinational study of major breast milk carotenoids of healthy mothers AB - Background: Carotenoids in serum vary between countries and within populations with evidence suggesting a qualitative relationship to diet. Breast milk carotenoids furnish a source of vitamin A and potentially provide immunoprotection and other health benefits for infants. There have been numerous studies of milk carotenoid concentrations in undernourished populations; however, carotenoid concentrations have not previously been compared in populations of well-nourished mothers. Aim of Study: To compare concentrations of five major carotenoid groups: alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein/zeaxanthin, and lycopene in breast milk of healthy women from Australia, Canada, Chile, China, Japan, Mexico, the Philippines, the United Kingdom, and the United States, and to qualitatively compare patterns of dietary intake with milk carotenoid concentrations. Methods: Breast milk collected from healthy lactating women was analyzed for concentrations of five carotenoids and retinol and quantitated relative to total milk lipid. All determinations were performed in a single research laboratory using standardized methodology. Mothers consumed their usual diets and provided a single 24-h dietary recall. Results: Breast milk carotenoid concentrations varied greatly among countries, with the greatest differences in beta-cryptoxanthin (similar to 9-fold) and the least in alpha-carotene and lycopene (similar to 3-fold). Breast milk retinol concentrations varied similar to 2-fold across countries. The provitamin A carotenoids alpha-carotene, beta-carotene, and beta-cryptoxanthin as a group accounted for > 50 % of the carotenoids measured. Total breast milk carotenoids were highest in Japanese and lowest in Philippine mothers. Breast milk beta-carotene concentrations were highest in Chile and lowest in the Philippines. Conclusions: Patterns of breast milk carotenoids were unique to each country and qualitative patterns reflected the dietary carotenoid supply MH - USA MH - Australia MH - Canada MH - Chile MH - Japan MH - Mexico|Distrito Federal MH - Philippines MH - United Kingdom PB - DARMSTADT: DR DIETRICH STEINKOPFF VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 1436-6207 UR - ISI:000183583900001 L2 - breast milk;carotenoids;healthy mothers;MATURE HUMAN-MILK; RED PALM OIL; BETA-CAROTENE; VITAMIN-A; SERUM; SUPPLEMENTATION; WOMEN; QUANTITATION; TRIALS SO - European Journal of Nutrition 2003 ;42(3):133-141 7602 UI - 8321 AU - Canipa-Morales NK AU - Galan-Vidal CA AU - Guzman-Vega MA AU - Jarvie DM AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Estado Hidalgo, CIQ, Pachuca 42076, Hgo, MexicoHumble Geochem Serv, Humble, TX 77338, USACanipa-Morales, NK, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Effect of evaporation on C-7 light hydrocarbon parameters AB - Light hydrocarbons are commonly used to evaluate crude oils to determine oil families, in-reservoir alteration processes such as evaporative fractionation, water washing, incipient biodegradation, maturity, and temperatures at which oil is expelled from source rocks. Light hydrocarbons in the C-7 range will evaporate under ambient conditions, and losses can occur during sample collection, handling, or storage. However, the impact of partial evaporation on interpretation of light hydrocarbon data has not been reported previously. Laboratory evaporation experiments show that the rate of evaporation of each C7 hydrocarbon is different, and these differential rates will affect the measured concentrations of these compounds, certain ratios, and other calculations or plots using these data. The paraffinicity/aromaticity ratio of Thompson [Marine Pet. Geol. 5 (1988) 237], parameters utilized in the transformation and correlation star diagrams of Halpern [AAPG Bull. 79 (1995) 801], and the oil typing ternary plot of Jarvie [The Mountain Geologist 38 (2001) 19] are affected by evaporation. Other interpretive schemes such as P2 versus N2/P3 and the invariant ratio [Science 273 (1987) 514; Geochim. Cosmoschim. Acta 54 (1990) 1315] are not grossly affected by partial evaporation because these parameters are primarily controlled by the concentration of methylhexanes or by offsetting rates of evaporation in certain compounds. By careful evaluation of these parameters and various interpretive plots, the extent of evaporation can be qualitatively assessed and discrimination of oil types, alteration effects, and evaporative artifacts can still be reasonably ascertained. This study demonstrates that preservation of crude oils from evaporation is essential for accurate application of all light hydrocarbon parameters, although some parameters may still be utilized when partial evaporation has occurred. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0146-6380 UR - ISI:000183197400009 L2 - PETROLEUM; ORIGIN; OIL SO - Organic Geochemistry 2003 ;34(6):813-826 7603 UI - 8880 AU - Canizales-Quinteros S AU - guilar-Salinas CA AU - Reyes-Rodriguez E AU - Riba L AU - Rodriguez-Torres M AU - Ramirez-Jimenez S AU - Huertas-Vazquez A AU - Fragoso-Ontiveros V AU - Zentella-Dehesa A AU - Ventura-Gallegos JL AU - Vega-Hernandez G AU - Lopez-Estrada A AU - uron-Gomez M AU - Gomez-Perez F AU - Rull J AU - Cox NJ AU - Bell GI AU - Tusie-Luna MT AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Unidad Biol Mol & Med Genom, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Biol Mol & Med Genom, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab Lipidos, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Serv Comp Acad, Direcc Gen, Mexico City 04510, DF, MexicoUniv Chicago, Howard Hughes Med Inst, Chicago, IL 60637, USAUniv Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637, USAUniv Chicago, Dept Med & Human Genet, Chicago, IL 60637, USATusie-Luna, MT, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Unidad Biol Mol & Med Genom, Vasco de Quiroga 15 Colonia Secc 16, Mexico City 14000, DF, Mexico TI - Locus on chromosome 6p linked to elevated HDL cholesterol serum levels and to protection against premature atherosclerosis in a kindred with familial hypercholesterolemia AB - Heterozygous familial hypercholesterolemia (FH) is a highly atherogenic genetic disorder leading to premature coronary heart disease (CHD), usually before 60 years of age. We studied an extended multigenerational kindred with FH linked to chromosome 1p32 in which atherosclerotic complications were either delayed or prevented in individuals with elevated HDL cholesterol (HDL-C) levels or hyperalphalipoproteinemia ( HA). Premature CHD was observed in FH individuals without HA. The study of this family established that the HA trait in the family also followed an autosomal dominant mode of inheritance with a pattern of segregation independent from FH. We identified a locus on chromosome 6 linked to elevated HDL-C levels ( HA) in this family. Haplotype analysis refined the localization to a 7.32-cM interval ( 73 to 80 cM from pter) flanked by markers D6S1280 and D6S1275. Parametric 2-point and multipoint analyses yielded maximum LOD scores of 3.05 and 3.17, respectively. This finding was confirmed with a nonparametric multipoint score of 3.78 ( P = 0.0009). We propose that this locus, linked to elevated HDL-C levels, confers protection against premature CHD within an FH context MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0009-7330 UR - ISI:000181711300015 L2 - LDL cholesterol;HDL cholesterol;genetics;familial hypercholesterolemia;hyperalphalipoproteinemia;HIGH-DENSITY-LIPOPROTEIN; CORONARY HEART-DISEASE; APOLIPOPROTEIN-A-I; WIDE LINKAGE ANALYSIS; TANGIER-DISEASE; ARTERY DISEASE; MAJOR LOCUS; GENE; PLASMA; BINDING SO - Circulation Research 2003 ;92(5):569-576 7604 UI - 6370 AU - Canseco-Marquez L AU - Gutierrez-Mayen G AU - Mendelson JR AD - Univ Nacl Autonoma Mexico, Zool Museum, Dept Evolut Biol, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Autonoma Puebla, Escuela Biol, Lab Herpetol, Puebla 72570, MexicoUtah State Univ, Dept Biol, Logan, UT 84322, USAMendelson, JR, Univ Nacl Autonoma Mexico, Zool Museum, Dept Evolut Biol, Fac Ciencias, AP 70-399, Mexico City 04510, DF, Mexico TI - Distribution and natural history of the hylid frog Hyla xera in the Tehuacan-Cuicatlan Valley, Mexico, with a description of the tadpole AB - We describe the tadpole of the recently described hylid frog Hyla xera and report information regarding the distribution and natural history of this species endemic to the Tehuacan-Cuicatlan Valley in Oaxaca and Puebla, Mexico. This species was previously known only from the type locality near Zapotitlan Salinas, Puebla, south of Tehuacan, Puebla. With our work, its range is now extended, adding 6 localities in Puebla and 4 in Oaxaca. Adults take refuge in arboreal bromeliads and breed in streams in the rainy season from May to August MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000188387800020 SO - Southwestern Naturalist 2003 ;48(4):670-675 7605 UI - 6373 AU - Canseco-Marquez L AU - Campbell JA AD - UNAM, Museum Zool, Dept Biol Evol, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Texas, Dept Biol, Arlington, TX 76019, USACampbell, JA, UNAM, Museum Zool, Dept Biol Evol, Fac Ciencias, AP 70-399, Mexico City 04510, DF, Mexico TI - Variation in Zapotitlan coralsnake, Micrurus pachecogili (Serpentes : Elapidae) AB - Micrurus pachecogili is a rare coralsnake that inhabits the desert region around Zapotitlan Salinas in southern Puebla, Mexico. The original description of this species was based on 2 specimens. We report on morphological variation, sexual dimorphism, and distribution based on 4 additional specimens. Males have 218-223 ventrals, 43-48 subcaudals, and 24-30 black body rings; females have 235-242 ventrals, 37-39 subcaudals, and 29-30 black body rings. This new material was collected at localities within the Zapotitlan Basin. The coralsnake most similar to M. pachecogili seems to be M. nebularis, which is restricted to pine-oak forest near Ixtlan de Juarez in central Oaxaca. Micrurus nebularis is easily distinguished in having fewer ventrals (203-208 in males and 218-223 in females) MH - Mexico|Distrito Federal MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000188387800026 SO - Southwestern Naturalist 2003 ;48(4):705-707 7606 UI - 7305 AU - Cansino S AU - Ducorps A AU - Ragot R AD - Natl Autonomous Univ Mexico, Fac Psychol, Lab Neurocognit, Mexico City 03421, DF, MexicoHop La Pitie Salpetriere, CNRS, LENA, UPR 640, Paris, FranceCansino, S, Natl Autonomous Univ Mexico, Fac Psychol, Lab Neurocognit, Apartado Postal 25-308, Mexico City 03421, DF, Mexico TI - Tonotopic cortical representation of periodic complex sounds AB - Most of the sounds that are biologically relevant are complex periodic sounds, i.e., they are made up of harmonics, whose frequencies are integer multiples of a fundamental frequency (Fo). The Fo of a complex sound can be varied by modifying its periodicity frequency; these variations are perceived as the pitch of the voice or as the note of a musical instrument. The center frequency (CF) of peaks occurring in the audio spectrum also carries information, which is essential, for instance, in vowel recognition. The aim of the present study was to establish whether the generators underlying the 100m are tonotopically organized based on the Fo or CF of complex sounds. Auditory evoked neuromagnetic fields were recorded with a whole-head magnetoencephalography (MEG) system while 14 subjects listened to 9 different sounds (3 Fo X 3 CF) presented in random order. Equivalent current dipole (ECD) sources for the 100m component show an orderly progression along the y-axis for both hemispheres, with higher CFs represented more medially. In the right hemisphere, sources for higher CFs were more posterior, while in the left hemisphere they were more inferior. ECD orientation also varied as a function of the sound CF. These results show that the spectral content CF of the complex sounds employed here predominates, at the latency of the 100m component, over a concurrent mapping of their periodic frequency Fo. The effect was observed both on dipole placement and dipole orientation.. (C) 2003 Wiley-Liss, Inc MH - France MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences;Neuroimaging;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 1065-9471 UR - ISI:000185818200003 L2 - auditory cortex;magnetic source imaging;neuromagnetism;fundamental frequency;harmonics;HUMAN AUDITORY-CORTEX; EVOKED MAGNETIC-FIELDS; DIPOLE MODEL ANALYSIS; HUMAN-BRAIN; NEUROMAGNETIC FIELDS; ASSOCIATION CORTEX; PITCH PERCEPTION; N1 WAVE; ORGANIZATION; POTENTIALS SO - Human Brain Mapping 2003 ;20(2):71-81 7607 UI - 7199 AU - Cantillo-Ciau Z AU - Mena-Rejon GJ AU - Quintero-Marmol E AU - Jimenez-Diaz A AU - Quijano L AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Yucatan, Fac Quim, Lab Quim Organ Invest, Merida 97150, Yucatan, MexicoUniv La Laguna, Inst Univ Bio Organ Antonio Gonzalez, Tenerife 38206, Islas Canaries, SpainQuijano, L, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Two new 24-isopropenyl-lanostanoids from Tillandsia brachycaulos AB - The leaves of Tillandsia brachycaulos afforded two novel tetracyclic triterpenoids identified as (24S)-24-isopropenyl-29-nor-5alpha-lanosta-7-en-3beta-ol (1) and (24S)-24-isopropenyl-29-nor-5alpha-lanosta-7-en-3-one (2), in addition to the known isopimaric acid (3) and chlorogenic acid (4). Their structures were elucidated on the basis of spectral analysis, including homo- and heteronuclear correlation NMR experiments (COSY, ROESY, HMQC and HMBC) and by comparison with data in the literature. The antimicrobial and antifungal activities were studied. The compounds did not show significant activity MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Spain PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000185928600009 L2 - Tillandsia;triterpenoids;NMR SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2003 ;58(9-10):649-654 7608 UI - 7330 AU - Canto G AU - Ordejon P AU - Cheng HS AU - Cooper AC AU - Pez GP AD - UAB, CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainAir Prod & Chem Inc, Computat Modeling Ctr, Allentown, PA 18195, USAAir Prod & Chem Inc, Corp Sci & Technol Ctr, Allentown, PA 18195, USACanto, G, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - First-principles molecular dynamics study of the stretching frequencies of hydrogen molecules in carbon nanotubes AB - We present a study of the vibrational frequencies of hydrogen molecules adsorbed in bundles of single wall carbon nanotubes. The frequencies are extracted from the analysis of first-principles molecular dynamics trajectories. We study the case of molecules inside the nanotubes (endohedral) and in the interstitial pores between the nanotubes (exohedral). We find that, in both configurations, the stretching frequencies are redshifted with respect to the free H-2 molecule. However, whereas all the exohedral molecules exhibit a redshift of around 45 cm(-1) , the endohedral molecules show two frequencies, one close to that of the exohedral molecules and the other similar to that of free H-2 MH - Mexico|Baja California MH - Spain MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1367-2630 UR - ISI:000185631900008 L2 - STORAGE; SYSTEMS; GRAPHITE; PHONONS; BINDING SO - New Journal of Physics 2003 ;5(): 7609 UI - 3022 AU - Cantu C AU - Wright RG AU - Scott JM AU - Strand E AD - Univ Nuevo Leon, Coll Forestry, Linares, NL, MexicoUniv Idaho, US Geol Survey, Idaho Cooperat Fish & Wildlife Res Unit, Moscow, ID 83843, USAUniv Idaho, Coll Nat Resources, Moscow, ID 83844, USACantu, C, Univ Nuevo Leon, Coll Forestry, Km 145 Carr CD Victoria, Linares, NL, Mexico TI - Conservation assessment of current and proposed nature reserves of Tamaulipas state, Mexico AB - The Mexican state of Tamaulipas located in the northeastern portion of the country currently has five state nature reserves covering slightly less than 3% of its land area. These reserves were established for a variety of reasons, many unrelated to the protection of biological resources. In 2000 in response to a growing concern about the lack of organized conservation reserve planning to protect the important biological and physical features of Mexico, the Mexican Commission for Knowledge and Use of Biodiversity (CONABIO) proposed 13 new terrestrial reserves for Tamaulipas. If established these new reserves would increase the proportion of terrestrial protected lands in the state to over 21%. We compiled a geographic information system (GIS) using existing digital thematic maps of physical and biological features to examine how the existing and proposed reserves might serve to protect the biodiversity and physical features of the state. We found that most of the existing protected sites occur in areas with elevations > 1000-2000 m with temperate climate and dominated by pine forest, oak forest, and cloud forest vegetation cover types. The state's dominant biotic region-low elevation coastal plain with tropical and and climate types and xeric scrub vegetation-is disproportionately underrepresented in the current reserve system. The creation of the proposed areas would substantially increase the protection of mid and high elevation lands. The largest gap in the protected lands network would be low elevation, level, coastal lands MH - Mexico|Nuevo Leon MH - USA PB - ROCKFORD: NATURAL AREAS ASSOCIATION RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Forestry U5 - J;Article AV - English IS - 0885-8608 UR - ISI:000227290700005 L2 - conservation planning;gap analysis;nature reserves;protected area system;GAP ANALYSIS; BIOLOGICAL DIVERSITY; VEGETATION; AREAS; USA SO - Natural Areas Journal 2003 ;23(3):220-228 7610 UI - 8614 AU - Canul-Chuil A AU - Vargas-Coronado R AU - Cauich-Rodriguez JV AU - Martinez-Richa A AU - Fernandez E AU - Nazhat SN AD - Ctr Invest Cientif Yucatan, AC, Merida, Yucatan, MexicoUniv Guanajuato, Fac Quim, Guanajuato 36050, Gto, MexicoUniv Politecn Catalunya, Dept Mat Sci & Met, Barcelona, SpainUniv Coll London, Eastman Dent Inst, Dept Biomat, London WC1X 8LD, EnglandCauich-Rodriguez, JV, Ctr Invest Cientif Yucatan, AC, Apartado Postal 87,Cordemex CP 97310, Merida, Yucatan, Mexico TI - Comparative study of bone cements prepared with either HA or alpha-TCP and functionalized methacrylates AB - The properties of bone cements prepared with both hydroxyapatite (HA) and alpha-tricalcium phosphate (alpha-TCP) and methacrylates containing acidic or basic groups are the main interest of this article. The presence of methacrylic acid or diethyll amino ethyl methacrylate as comonomers in the bone cement and both ceramic types as filler were found not to affect the amount of residual monomer, which was generally less than 4.5 wt%. In contrast, setting times, maximum temperature, and glass transition temperature were found to be composition dependent. For samples with acidic comonomer, a faster setting time, a higher maximum temperature, and higher glass transition temperatures were observed compared to those with the basic comonomer. The presence of the fillers slightly increased the setting time but did not affect the other parameters. The mechanical properties of the filled bone cements depended mainly on composition and type of testing. Both HA or alpha-TCP filled systems fulfilled the minimum compressive strength required for bone cement application, although a significantly lower value was observed for the alkaline comonomer systems. The minimum bending strength was not satisfied by any of these formulations. The tensile and shear strength of these composites ranged from 20 to 37.9 and from 18 to 27 MPa, respectively. In all cases it was higher for bone cements containing methacrylic acid. The results of this study suggest that the properties of dry unfilled bone cements prepared with MAA are comparable to CMW 3 in mechanical terms but inferior in their setting properties. (C) 2002 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 6413: 27-37, 2003 MH - United Kingdom MH - Mexico|Guanajuato MH - Mexico|Yucatan MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0021-9304 UR - ISI:000182424300005 L2 - bone cements;hydroxyapatite;alpha-TCP;mechanical properties;HYDROXYAPATITE; FILLER SO - Journal of Biomedical Materials Research Part B-Applied Biomaterials 2003 ;64B(1):27-37 7611 UI - 7040 AU - Capettini F AU - Rasmusson DC AU - ll-Macky R AU - Schiefelbein E AU - Elakkad A AD - Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108, USAUniv Minnesota, Dept Plant Pathol, St Paul, MN 55108, USACapettini, F, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Inheritance of resistance to Fusarium Head Blight in four populations of barley AB - Fusarium Head Blight (FHB), caused by Fusarium graminearum Schwabe [(teleomorph Giberella Zeae (Schwein.)], has been a major disease problem of barley (Hordeam vulgare L.) in the U.S. Midwest since 1993. It can make a potentially profitable barley crop unusable for malting, and substantially reduce its value as a feed grain. The main cause of economic loss in malting barley is the presence of deoxynivalenol (DON) or vomitoxin, a mycotoxin produced by the fungus. The objective of this research was to investigate the inheritance of resistance to FHB by the estimation of heritability through components of variance in multiple environments. Four populations resulting from crosses between putative resistant and susceptible parents were evaluated in inoculated and mist irrigated nurseries at three locations in Minnesota from 1995 to 1997 and China in 1997. On the basis of multiple environment data, estimates of heritability for FHB ranged from 0.48 to 0.76. Heritability estimates from individual environments for FHB ranged from low to high; these estimates were likely inflated by genotype X environment (G X E) interaction. Resistance levels approximating that of the resistant parent were recovered in most populations and one transgressive resistant line was found in Population 3. Transgressive segregates toward susceptibility were found in Populations 2, 3, and 4 for FHB. The heritability estimates were somewhat encouraging, as they indicated that moderate genetic gain can be expected when selecting for FHB resistance in a breeding program. However, a strong message was conveyed in the variable response of the parents and the ever present G X E interaction that FHB resistance breeding represents an unusually large challenge MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000186477700008 L2 - QUANTITATIVE TRAIT LOCI; KERNEL DISCOLORATION SO - Crop Science 2003 ;43(6):1960-1966 7612 UI - 8414 AU - Capra L AU - Lugo-Hubp J AU - Borselli L AD - Natl Autonomous Univ Mexico, Inst Geog, Mexico City 04510, DF, MexicoIst Studio Ecosistemi CNR ISE, Florence, ItalyCapra, L, Natl Autonomous Univ Mexico, Inst Geog, Mexico City 04510, DF, Mexico TI - Mass movements in tropical volcanic terrains: the case of Teziutlan (Mexico) AB - During the last decade, soil degradation coupled with global climate changes has increased hydrogeological hazards in Mexico. In tropical volcanic terrains, alteration processes have enhanced the formation of clay minerals that promote water retention and result in soil/rock weakness. Intense seasonal rainfall can trigger the liquefaction and remobilization of these low-resistance terrains. During the first week of October 1999, heavy rains affected eastern Mexico, including Puebla State. As a consequence, approximately 3000 mass movements, consisting of rock and soil slides and slips, debris flows and avalanches were generated in this area. In the town of Teziutlan (Puebla), which is located on volcanic deposits, a single mass-movement event caused approximately 150 deaths. In the present work we identified two types of mass movements in the Teziutlan area-Type 1: superficial erosion of an unwelded ignimbritic sequence forming small detrital fans, and Type 2: thin soil slide/debris flow from the remobilization of a volcanic sequence composed of clay-rich paleosols interbedded with ashfall horizons. The clay-rich volcanic paleosols favored the formation of perched water tables on a hydraulic aquiclude. Positive pore-water pressures triggered the failure. Based on these results, the principal human settlement in the Teziutlan area may be threatened by future debris flows, which could cause serious harm to the dense population and severe damage to its infrastructure. It is necessary to prevent future deaths and damage by installation of mitigative measures based on detailed studies. Without any further study, it will not be possible to prevent and mitigate a natural disaster with the same magnitude as the 1999 catastrophic hydrogeological phenomena. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0013-7952 UR - ISI:000183028900010 L2 - mass movement;soil slide;debris flow;tropical volcanic terrain;Mexico;DEBRIS FLOWS; SLOPES SO - Engineering Geology 2003 ;69(3-4):359-379 7613 UI - 9237 AU - Cardador MH AU - Cuevas AL AU - Watanabe H AU - Saito A AU - Wada K AU - Ishikawa H AU - Okuzumi K AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoPetroleos Mexicanos Act Tampico Cesar Lopez de La, Tampico 89000, Tamaulipas, MexicoJapan Natl Oil Corp Technol Res Ctr, Mihama Ku, Chiba 261, JapanMineral Mitsui Dev Engn Co Ltd, Shinagawa Ku, Tokyo 1410032, JapanCardador, MH, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152 Del Gustavo Madero, Mexico City 07730, DF, Mexico TI - Experimental evaluation of hydrocarbon detection with the Long-Offset Time-Domain Electromagnetic Method in the Cretaceous carbonates of the Tampico-Misantla basin, Mexico AB - In Mexico, an experimental study with a Long-Offset Time-Domain Electromagnetic Method (LOTDEM) was carried out in the Tampico-Misantla basin of northeastern Mexico. The main objective was to evaluate this method for hydrocarbon exploration. The selected area is suitable for LOTDEM experiments because high quality seismic data, geological information and well logging data are available. The results obtained are excellent, and allow us to determine the types of fluids present in the rock pores and fractures of the studied geological structures. Resistivity anomalies correlate in position and depth with the geological structures observed in the seismic sections where the LOTDEM survey was carried out, and with well logging data from the nearby Franco Espanola oil field. In the studied area, these structures are 800-1200 m deep, in carbonate rocks with high clay content and are invaded by salt water. Consequently, the resistivity and primary porosities are very low. The main reservoirs of oil and gas in this region are a naturally fractured basinal facies, consisting of fine-grained limestones and shaly limestones, that corresponds to the Cretaceous units San Felipe, Agua Nueva, Tamaulipas Superior and Tamaulipas Inferior. The fractured rocks reservoirs are very difficult to detect, even with well logs. However, the results of this survey show the higher resolution, the greater depth of investigation, and the advantages that the LOTDEM method present compared to the traditional frequency domain electric and electromagnetic (FEM) methods. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Mining & Mineral Processing U5 - J;Article AV - English IS - 0926-9851 UR - ISI:000180712500003 L2 - time-domain electromagnetics;hydrocarbon exploration;Cretaceous;Tampico-Misantla basin;Mexico;INVERSION; SMOOTH; MODELS SO - Journal of Applied Geophysics 2003 ;52(2-3):103-122 7614 UI - 7161 AU - Cardenas A AU - rguelles-Monal W AU - Goycoolea FM AU - Higuera-Ciapara I AU - Peniche C AD - Ctr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Guaymas 85480, Sonora, MexicoCtr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoUniv La Habana, Ctr Biomat, Havana, CubaCardenas, A, Ctr Invest Alimentac & Desarrollo AC, Unidad Guaymas, POB 284, Guaymas 85480, Sonora, Mexico TI - Diffusion through membranes of the polyelectrolyte complex of chitosan and alginate AB - The swelling of membranes of the polyelectrolyte complex (PEC) between chitosan and alginate shows a similar pattern to that of other PECs. However, if the swelled membranes are dried, a second swelling process is seen which exhibits Fickian behavior. The apparent activation energy was estimated to be 32.8 kJ.mol(-1). The release rate of model solutes was highly dependent on their molecular weight and the pH of the medium MH - Cuba MH - Mexico|Sonora PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 1616-5187 UR - ISI:000186165700005 L2 - alginate;chitosan;diffusion;polyelectrolyte complex;swelling;POLY-ELECTROLYTE COMPLEX; CARBOXYMETHYL CELLULOSE SO - Macromolecular Bioscience 2003 ;3(10):535-539 7615 UI - 8117 AU - Cardenas CA AU - Guerrero-Mata MP AU - Colas R AD - Univ Nacl Colombia, Fac Ingn, Santa Fe De Bogota, ColombiaUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza, NL, MexicoColas, R, Univ Colas, Lab Iron & Steelmaking, Technol Pk 9, B-9052 Ghent, Belgium TI - Forming analysis of a tubular connecting bolt AB - A visioplastic analysis was conducted on cold-forged samples which were part of the production of connecting bolts. Forming is carried out starting with a cylindrical blank that is pierced in two indirect extrusion passes to produce the tubular part. The strain gradients within each piece were determined using the flow lines of the material, put in evidence by metallographic means, as internal markers. The visioplastic analysis was complemented with microhardness indentation tests made on the pierced specimens and with compression tests made on specimens machined from an undeformed blank. It was found that the strain distribution was heterogeneous; the higher values of the normal components were located at the tubular walls of the pieces, whereas the higher values of the shear and equivalent components were found close to the changes in geometry of the specimens, where the material flow has to change its direction. A good correlation between the values of microhardness and equivalent strain distribution was observed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Belgium MH - Colombia MH - Mexico|Nuevo Leon PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Industrial;Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0924-0136 UR - ISI:000183726800007 L2 - forming;visioplasticity;cold-forging;strain distribution;steel;PLASTIC INSTABILITY; COMPRESSION; FLOW; DIE SO - Journal of Materials Processing Technology 2003 ;134(1):53-58 7616 UI - 8859 AU - Cardenas L AU - Thomas-Oates JE AU - Nava N AU - Lopez-Lara IM AU - Hepler PK AU - Quinto C AD - UNAM, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoUniv Utrecht, Fac Chem, Dept Mass Spectrometry, Utrecht, NetherlandsLeiden Univ, Inst Mol Plant Sci, NL-2333 AL Leiden, NetherlandsUniv Massachusetts, Morrill Sci Ctr, Biol Dept, Amherst, MA 01003, USACardenas, L, UNAM, Inst Biotechnol, Dept Biol Mol Plantas, Apartado Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - The role of nod factor substituents in actin cytoskeleton rearrangements in Phaseolus vulgaris AB - In order to define the symbiotic role of some of the chemical substituents in the Rhizobium etli Nod factors (NFs), we purifled Nod metabolites secreted by the SM25 strain, which carries most of the nodulation genes, and SM17 with an insertion in nodS. These NFs were analyzed for their capabilities to induce root hair curling and cytoskeletal rearrangements. The NFs secreted by strain SM17 lack the carbamoyl and methyl substituents on the nonreducing terminal residue and an acetyl moiety on the fucosyl residue on the reducing-terminal residue as determined by mass spectrometry. We have reported previously that the root hair cell actin cytoskeleton from bean responds with a rapid fragmentation of the actin bundles within 5 min of NF exposure, and also is accompanied by increases in the apical influxes and intracellular calcium levels. In this article, we report that methyl-bearing NFs are more active in inducing root hair curling and actin cytoskeleton rearrangements than nonmethylated NFs. However, the carbamoyl residue on the nonreducing terminal residue and the acetyl group at the fucosyl residue on the reducing terminal residue do not seem to have any effect on root hair curling induction or in actin cytoskeleton rearrangement MH - Mexico|Morelos MH - Netherlands MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000181728400007 L2 - FITC-phalloidin;lipochitin-oligosaccharide;microinjection;ALFALFA ROOT HAIRS; RHIZOBIUM-ETLI; NODULATION SIGNALS; CALCIUM SPIKING; MEDICAGO-SATIVA; STRUCTURAL MODIFICATIONS; LEUCAENA-LEUCOCEPHALA; BIOLOGICAL-ACTIVITY; GENES; LIPOCHITOOLIGOSACCHARIDE SO - Molecular Plant-Microbe Interactions 2003 ;16(4):326-334 7617 UI - 8257 AU - Cardenas R AU - Lin XW AU - Canosa LF AU - Luna M AU - Aramburo C AU - Peter RE AD - Univ Alberta, Dept Sci Biol, Edmonton, AB T6G 2E9, CanadaUniv Nacl Autonoma Mexico, Escuela Nacl Estudios Profess Iztacala, Unidad Morfol & Func, Mexico City 54090, DF, MexicoUniv Nacl Autonoma Mexico, Inst Neurobiol, Queretaro 76230, Qro, MexicoPeter, RE, Univ Alberta, Dept Sci Biol, Edmonton, AB T6G 2E9, Canada TI - Estradiol reduces pituitary responsiveness to somatostatin (SRIF-14) and down-regulates the expression of somatostatin sst(2) receptors in female goldfish pituitary AB - Sex steroid hormones have been shown to regulate somatostatin (SRIF) gene expression in goldfish brain, which in turn influences the regulation of GH secretion. In this study, the influences of sex steroids: on pituitary responsiveness to SRIF-14 and, the pituitary expression of a type two SRIF receptor (sst(2)) were examined. Results from. in vitro perifusion of pituitary fragments, show that pituitaries from estradiol-primed sexually regressed female fish have significantly lower GH release responsiveness to pulse exposure to SRIF-14 than pituitaries from control or testosterone-treated sexually regressed females. Results from in vitro. static culture show that pituitaries from sexually mature female fish have lower GH release responsiveness to SRIF-14 than those from sexually regressed females. In addition, the sst(2) receptor mRNA levels in pituitaries from mature and recrudescent female fish are significantly lower than in sexually regressed female fish. Our results indicate that estradiol acts at the level of the pituitary to regulate GH secretion by influencing the responsiveness to SRIF-14. The underlying mechanism includes, in part, reduction of the expression Of sst(2) receptors, presumably leading to the lower number of the receptors available for SRIF binding. (C) 2003 Elsevier Science (USA). All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0016-6480 UR - ISI:000183392500014 L2 - sex steroids;somatostatin;growth hormone;somatostatin receptor;gene expression;pituitary;goldfish;GONADOTROPIN-RELEASING-HORMONE; TROUT ONCORHYNCHUS-MYKISS; GROWTH-HORMONE; RAINBOW-TROUT; SEXUAL-MATURATION; CARASSIUS-AURATUS; 17-BETA-ESTRADIOL; SECRETION; CELLS; CULTURES SO - General and Comparative Endocrinology 2003 ;132(1):119-124 7618 UI - 6961 AU - Cardiel MH AU - Tumlin JA AU - Furie RA AU - Wallace DJ AU - Hura C AU - Strand V AU - Foster T AU - Hu J AU - Heilbrunn KR AU - Linnik MD AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoEmory Univ, Atlanta, GA 30322, USAN Shore Univ Hosp, Manhasset, NY, USAWallace Rheumat Study Ctr, Los Angeles, CA, USASan Antonio Kidney Dis Ctr, San Antonio, TX, USAStanford Univ, Palo Alto, CA 94304, USALa Jolla Pharmaceut, San Diego, CA, USA TI - Clinical efficacy results from a RCT of LJP 394 in SLE patients with history of renal disease MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 5 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801545 SO - Arthritis and Rheumatism 2003 ;48(9):S582-S583 7619 UI - 8810 AU - Cardoso C AU - Leventer RJ AU - Ward HL AU - Toyo-oka K AU - Chung J AU - Gross A AU - Martin CL AU - Allanson J AU - Pilz DT AU - Olney AH AU - Mutchinick OM AU - Hirotsune S AU - Wynshaw-Boris A AU - Dobyns WB AU - Ledbetter DH AD - Univ Chicago, Dept Human Genet, Chicago, IL 60637, USAFac Med La Timone, INSERM, U491, Marseille, FranceRoyal Childrens Hosp, Dept Neurol, Melbourne, Vic, AustraliaRoyal Childrens Hosp, Murdoch Childrens Res Inst, Melbourne, Vic, AustraliaUniv Calif San Diego, Sch Med, Dept Pediat, La Jolla, CA 92093, USAUniv Calif San Diego, Sch Med, Dept Med, La Jolla, CA 92093, USAChildrens Hosp Eastern Ontario, Div Genet, Ottawa, ON K1H 8L1, CanadaUniv Ottawa, Ottawa, ON, CanadaUniv Wales Hosp, Inst Med Genet, Cardiff CF4 4XN, S Glam, WalesUniv Nebraska, Med Ctr, Ctr Human Genet, Omaha, NE, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Genet, Tlalpan, MexicoSaitama Med Sch, Res Inst Genom Med, Hidaka, JapanLedbetter, DH, Univ Chicago, Dept Human Genet, 920 E 58th St, Chicago, IL 60637 USA TI - Refinement of a 400-kb critical region allows genotypic differentiation between isolated lissencephaly, Miller- Dieker syndrome, and other phenotypes secondary to deletions of 17p13.3 AB - Deletions of 17p13.3, including the LIS1 gene, result in the brain malformation lissencephaly, which is characterized by reduced gyration and cortical thickening; however, the phenotype can vary from isolated lissencephaly sequence (ILS) to Miller-Dieker syndrome (MDS). At the clinical level, these two phenotypes can be differentiated by the presence of significant dysmorphic facial features and a more severe grade of lissencephaly in MDS. Previous work has suggested that children with MDS have a larger deletion than those with ILS, but the precise boundaries of the MDS critical region and causative genes other than LIS1 have never been fully determined. We have completed a physical and transcriptional map of the 17p13.3 region from LIS1 to the telomere. Using fluorescence in situ hybridization, we have mapped the deletion size in 19 children with ILS, 11 children with MDS, and 4 children with 17p13.3 deletions not involving LIS1. We show that the critical region that differentiates ILS from MDS at the molecular level can be reduced to 400 kb. Using somatic cell hybrids from selected patients, we have identified eight genes that are consistently deleted in patients classified as having MDS. In addition, deletion of the genes CRK and 14-3-3epsilon delineates patients with the most severe lissencephaly grade. On the basis of recent functional data and the creation of a mouse model suggesting a role for 14-3-3epsilon in cortical development, we suggest that deletion of one or both of these genes in combination with deletion of LIS1 may contribute to the more severe form of lissencephaly seen only in patients with MDS MH - Australia MH - Canada MH - France MH - USA MH - Japan MH - Mexico|Distrito Federal MH - United Kingdom PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 53 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000181972600012 L2 - SYNDROME CHROMOSOME REGION; SUPPRESSOR LOCUS; MUTATIONS CAUSE; LIS1 GENE; MALFORMATION; MAP; EXPRESSION; PROTEIN-2; SEQUENCE; PRODUCT SO - American Journal of Human Genetics 2003 ;72(4):918-930 7620 UI - 9264 AU - Carpena X AU - Soriano M AU - Klotz MG AU - Duckworth HW AU - Donald LJ AU - Melik-Adamyan W AU - Fita I AU - Loewen PC AD - Univ Manitoba, Dept Microbiol, Winnipeg, MB R3T 2N2, CanadaCSIC, Cid, ES-08034 Barcelona, SpainUNAM, Inst Quim, Dept Bioquim, Mexico City, DF, MexicoUniv Louisville, Dept Biol, Louisville, KY 40292, USAUniv Manitoba, Dept Chem, Winnipeg, MB R3T 2N2, CanadaRussian Acad Sci, Inst Crystallog, Moscow, RussiaLoewen, PC, Univ Manitoba, Dept Microbiol, Winnipeg, MB R3T 2N2, Canada TI - Structure of the clade 1 catalase, CatF of Pseudomonas syringae, at 1.8 angstrom resolution AB - Catalase CatF of Pseudomonas syringae has been identified phylogenetically as a clade 1 catalase, closely related to plant catalases, a group from which no structure has been determined. The structure of CatF has been refined at 1.8 Angstrom resolution by using X-ray synchrotron data collected from a crystal flash-cooled with liquid nitrogen. The crystallographic agreement factors R and R-free,, are, respectively, 18.3% and 24.0%. The asymmetric unit of the crystal contains a whole molecule that shows accurate 222-point group symmetry. The crystallized enzyme is a homotetramer of subunits with 484 residues, some 26 residues shorter than predicted from the DNA sequence. Mass spectrometry analysis confirmed the absence of 26 N-terminal residues, possibly removed by a periplasmic transport system. The core structure of the CatF subunit was closely related to seven other catalases with root-mean-square deviations (RMSDs) of 368 core Calpha atoms of 0.99-1.30 Angstrom The heme component of CatF is heme b in the same orientation that is found in Escherichia coli hydroperoxidase II, an orientation that is flipped 180degrees with respect the orientation of the heme in bovine liver catalase. NADPH is not found in the structure of CatF because key residues required for nucleotide binding are missing, 2129 water molecules were refined. into the model. Water occupancy in the main or perpendicular channel of CatF varied among the four subunits from two to five in the region between the heme and the conserved Asp150. A comparison of the water occupancy in this region with the same region in other catalases reveals significant differences among the catalases. (C) 2003 Wiley-Liss, Inc MH - Canada MH - Mexico|Distrito Federal MH - Russia MH - Spain MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0887-3585 UR - ISI:000180691300005 L2 - catalase;crystal structure;NADPH binding;heme orientation;water occupancy;FLIGHT MASS-SPECTROMETER; BEEF-LIVER CATALASE; ESCHERICHIA-COLI; MACROMOLECULAR STRUCTURES; SACCHAROMYCES-CEREVISIAE; 3-DIMENSIONAL STRUCTURE; PROTEUS-MIRABILIS; CRYSTAL-STRUCTURE; ION-SOURCE; HPII SO - Proteins-Structure Function and Genetics 2003 ;50(3):423-436 7621 UI - 6508 AU - Carranza J AU - Brennan C AU - Sletten J AU - Clemente-Juan JM AU - Lloret F AU - Julve M AD - Univ Bergen, Dept Chem, N-5007 Bergen, NorwayUniv Valencia, Fac Quim, Dept Quim Inorgan, Inst Ciencia Mol, E-46100 Burjassot, SpainUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98000, MexicoSletten, J, Univ Bergen, Dept Chem, Allegt 41, N-5007 Bergen, Norway TI - Crystal structures and magnetic properties of 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz)-containing copper(II) complexes MH - Mexico|Zacatecas MH - Norway MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000187740100020 L2 - NEUTRON-SCATTERING SPECTRA; BRIDGING LIGAND; ANTIFERROMAGNETIC INTERACTIONS; 2,3,5,6-TETRA(2-PYRIDYL)PYRAZINE TPPZ; SPECTROELECTROCHEMICAL PROPERTIES; 2,3-BIS(2-PYRIDYL)PYRAZINE DPP; ENERGY-LEVELS; PYRAZINE; CHAINS; STATE SO - Inorganic Chemistry 2003 ;42(26):8716-8727 7622 UI - 6784 AU - Carranza J AU - Brennan C AU - Sletten J AU - Vangdal B AU - Rillema P AU - Lloret F AU - Julve M AD - Univ Bergen, Dept Chem, N-5007 Bergen, NorwayUniv Valencia, Fac Quim, Inst Ciencia Mol, Dept Quim Inorgan, E-46100 Valencia, SpainUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98000, MexicoWichita State Univ, Dept Chem, Wichita, KS 67260, USASletten, J, Univ Bergen, Dept Chem, Allegaten 41, N-5007 Bergen, Norway TI - Syntheses, crystal structures and magnetic properties of new oxalato-, croconato- and squarato-containing copper(II) complexes AB - The preparation and magnetic investigation of five mononuclear copper(II) complexes of formula [Cu(pyim)(C2O4)(H2O)].2H(2)O (1), [Cu(pyim)(C4O4)(H2O)(2)].2H(2)O (2), Cu(pyim)(C5O5).2.5H(2)O (3), [Cu(H(2)bim)(C2O4)(H2O)].H2O (4) and [Cu(bpz)(C5O5)(H2O)] (5) [pyim = 2-(2-pyridyl)imidazole, H(2)bim = 2,2'-biimidazole, bpz = 2,2'-bipyrazine, C2O42- = dianion of oxalic acid, C4O42- = dianion of squaric acid and C5O52- = dianion of croconic acid] are reported. The crystal structures of 1, 2, 4 and 5 have been determined. The copper atom has a distorted square pyramidal geometry in this family of complexes: two nitrogen atoms from the bidentate nitrogen donor [pyim (1 and 2), H(2)bim (4) and bpz (5)] and two oxygen atoms either from a chelating oxalate (1 and 4)/croconate (5) or from a monodentate squarate and a water molecule (2) build the basal plane whereas a water molecule fills the apical position (1, 2, 4 and 5). A semi-coordinated oxalate (1 and 4)/croconate (5) oxygen atom of a neighbouring molecule occupies the sixth coordination position, leading to centrosymmetric dinuclear units. Magnetic susceptibility measurements for 1-5 in the temperature range 2- 290 K reveal the occurrence of weak intermolecular ferro-(1) and antiferromagnetic (2- 5) interactions. The different strategies to use these neutral complexes as ligands in order to design polynuclear species are analyzed and discussed MH - Mexico|Zacatecas MH - Norway MH - Spain MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1144-0546 UR - ISI:000186906400018 L2 - TRANSITION-METAL-COMPLEXES; ELECTRONIC-PROPERTIES; MOLECULAR-STRUCTURE; NICKEL(II) COMPLEXES; EXCHANGE INTERACTION; DIMETHYL-SULFOXIDE; COORDINATION MODE; BRIDGING LIGANDS; AROMATIC ANIONS; DIHYDRATE SO - New Journal of Chemistry 2003 ;27(12):1775-1783 7623 UI - 8798 AU - Carrari F AU - ech-Arnold R AU - Osuna-Fernandez R AU - Hopp E AU - Sanchez R AU - Iusem N AU - Lijavetzky D AD - INTA Castelar, CNIA, CICVyA, Inst Biotecnol, Castelar, ArgentinaUniv Buenos Aires, Fac Ciencias Exactas & Nat, Lab Fisiol & Biol Mol, RA-1053 Buenos Aires, DF, ArgentinaMax Planck Inst Mol Pflanzenphysiol, D-14476 Golm, GermanyUniv Buenos Aires, Fac Agron, IFEVA, RA-1053 Buenos Aires, DF, ArgentinaUNAM, Fac Ciencias, Mexico City, DF, MexicoEST Ingn Agron, Dept Biotecnol, Lab Bioquim & Biol Mol, Madrid 28040, SpainLijavetzky, D, INTA Castelar, CNIA, CICVyA, Inst Biotecnol, Castelar, Argentina TI - Genetic mapping of the Sorghum bicolor vp1 gene and its relationship with preharvest sprouting resistance AB - The plant vp1 gene encodes a transcription factor originally identified in maize that participates in the control of the transition from embryogenesis to seed germination. Different lines of evidence suggest that vp1 participates in preharvest sprouting (PHS) resistance in cereals, but the genetic relationship is not yet established. Thus, the aim of this study was to investigate if there is a connection between vp1 and the formerly documented quantitative trait loci for PHS in Sorghum bicolor. This gene was mapped in sorghum using two well-studied inbred lines displaying contrasting PHS phenotypes. Linkage analysis revealed that the S. bicolor vp1 (Sbvp1) locus is linked to markers located on chromosomes 3 and 8 in maize. Analysis indicated that this gene is not correlated with PHS at a statistically significant level. Structural analysis of the Sbvp1 gene from both inbred lines showed a high degree of overall conservation (low polymorphism), even in the promoter region. These findings, taken together with the previously observed correlation between the pattern of expression of this gene and PHS performance, suggest that Sbvp1 might act downstream in the signalling pathway that leads to seed germination, or even be differentially regulated as a consequence rather than as a cause of the phenotypic behaviour MH - Argentina MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000182107000009 L2 - viviparous-1;Sbvp1;dormancy;quantitative trait loci (QTL);pre-harvest sprouting;genetic mapping;QUANTITATIVE TRAITS; MENDELIAN FACTORS; MAIZE VP1; RFLP MAP; RICE; CONSTRUCTION; EXPRESSION; SUGARCANE; DORMANCY; REGIONS SO - Genome 2003 ;46(2):253-258 7624 UI - 9090 AU - Carreon-Diazconti C AU - Nelson ST AU - Mayo AL AU - Tingey DG AU - Smith M AD - Univ Autonoma Baja California, Inst Ingn, Mexicali 21280, Baja California, MexicoBrigham Young Univ, Dept Geol, Provo, UT 84602, USACarreon-Diazconti, C, Univ Utah, Coll Mines & Earth Sci, Dept Geol & Geophys, 135 S 1460 E,Room 719, Salt Lake City, UT 84112 USA TI - A mixed groundwater system at Midway, UT: discriminating superimposed local and regional discharge AB - Mixed thermal and cold water groundwater occurs in the Midway area, UT. Midway is located in the western Heber Valley, an alluvial-filled intermontane basin behind the crest of the Wasatch Mountains. In addition to streams and thermal springs, groundwater discharges from alluvium, bedrock, and karstified tufa. Evaluation of the thermal system reveals that it has been circulated to depths of similar to 2 km and temperatures of similar to 150degreesC. Most groundwater characteristics of the area can be explained by subsurface mixing between isotopically depleted, Pleistocene-aged thermal water and isotopically enriched, cold, modem, low TDS groundwater. Because the entire system exhibits evidence of mixing, it is possible to define the regional extent of upwelling of thermal water, as well as mixing fractions between the two end-members. The subsurface mixing of thermal and non-thermal waters is highly controlled by the superimposition of local irrigation recharge. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000181223900008 L2 - hydrogeology;hydrochemistry;stable isotopes;mixing;groundwater;water end-members;WATER; FLOW; NORMALIZATION SO - Journal of Hydrology 2003 ;273(1-4):119-138 7625 UI - 9023 AU - Carrera S AU - Salas O AU - Moore JJ AU - Woolverton A AU - Sutter E AD - Colorado Sch Mines, Adv Coatings & Surface Engn Lab, Golden, CO 80401, USAITEM CEM, Atizapan 52926, MexicoFiberguide Ind, Caldwell, ID 83605, USASalas, O, Colorado Sch Mines, Adv Coatings & Surface Engn Lab, 1500 Illinois St, Golden, CO 80401 USA TI - Performance of CrN/MOS2 (Ti) coatings for high wear low friction applications AB - A CrN/MoS2 (Ti) coating was developed in order to improve the tribological characteristics of single CrN coatings as a possible alternative for high wear low friction applications. The MoS2 (Ti) coating was produced by PVD closed-field unbalanced magnetron sputtering on CrN coated stainless steel substrates. The tribological performance of both, the single CrN coating and the CrN/MoS2 (Ti) coating was evaluated and compared. Characterization of the coatings included: scratch testing, wear testing, nanoindentation, X-ray diffraction, optical and scanning electron microscopy. The CrN coating exhibited excellent adhesion, hardness and stiffness. However, adding the MoS2 (Ti) layer led to a significant improvement in the tribological properties, while maintaining the good adhesion characteristics of the underlying CrN layer. A maximum wear volume and coefficient of friction reduction of 95% was observed. Surface roughness of the coatings did not play a major role on the tribological properties. The results of this work provide with enough evidence to consider the CrN/MoS2 (Ti) coating as a promising alternative for high wear low friction applications. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Estado De Mexico PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 15 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000181315200004 L2 - tribological properties;hard-lubricating coatings;composite coatings SO - Surface & Coatings Technology 2003 ;167(1):25-32 7626 UI - 7648 AU - Carrillo-Castaneda G AU - Munoz JJ AU - Peralta-Videa JR AU - Gomez E AU - Gardea-Torresdey JL AD - Colegio Postgrad, Montecillo 56230, MexicoUniv Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968, USACarrillo-Castaneda, G, Colegio Postgrad, Montecillo 56230, Mexico TI - Plant growth-promoting bacteria promote copper and iron translocation from root to shoot in alfalfa seedlings AB - Plant growth-promoting microorganisms have been utilized to promote plant potentialities and it has been reported that some bacterial strains can help certain plants to acquire iron (Fe) via siderophores. In this investigation it has been demonstrated that certain bacterial strains that synthesize siderophores influence copper (Cu) and Fe accumulation in alfalfa (Medicago sativa) seedlings mainly because they are able to modulate metal translocation from root to shoot. The roots of inoculated seedlings, growing in a solution containing 10 mg L-1 of CuSO4.5H(2)O plus 10mgL(-1) of FeCl3.6H(2)O, accumulated in a period of 8 days from 97 (UAP154 and UAP40) to 120 (U) mg of Cu per kg of dry matter (mean 110.41) and Fe from 126 (UAP154 and UAP40) to 151 (U, Avm, and CPMex46) (mean 139.26) while the non-inoculated ones accumulated 103.8 and 146.9 mg of Cu and Fe per kg of dry mass, respectively. The accumulated Cu in stems of seedlings inoculated with the strains CPMex46, Avm, and UAP154 was 33, 24, and 0.3% more than the amount of Cu accumulated in stems of non-inoculated seedlings (33.7 mg of metal per kg of dry mass). In the case of Fe, the stems of seedlings inoculated with the strains Avm, CPMex46, UAP40, and UAP154 accumulated 37, 31, 4, and 2% more Fe, respectively, as compared with the non-inoculated seedlings (78.8 mg of metal per kg of dry mass). These results demonstrate that the strains CPMex46 and Avm improve both Cu and Fe translocation potential from root to shoot in alfalfa seedlings, fact that may be consider to promote the use of alfalfa crop for bioremediation applications MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000184965400008 L2 - metal uptake;metal accumulation;bioremediation;AZOSPIRILLUM-BRASILENSE; MICROBIAL SIDEROPHORES; RHIZOBIUM-PHASEOLI; TOXICITY; INOCULATION; RICE; ACID; PHYTOSIDEROPHORES; DEFICIENCIES; PHYSIOLOGY SO - Journal of Plant Nutrition 2003 ;26(9):1801-1814 7627 UI - 6893 AU - Carrillo-Chavez A AU - Morton-Bermea O AU - Gonzalez-Partida E AU - Rivas-Solorzano H AU - Oesler G AU - Garcia-Meza V AU - Hernandez E AU - Morales P AU - Cienfuegos E AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76230, MexicoUniv Nacl Autonoma Mexico, Posgrado Ciencias Tierra, Mexico City 04510, DF, MexicoUniv Wyoming, Dept Geol, Laramie, WY 82071, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoCarrillo-Chavez, A, Univ Nacl Autonoma Mexico, Ctr Geociencias, Campus Juriquilla,Postal 1-742, Queretaro 76230, Mexico TI - Environmental geochemistry of the Guanajuato Mining District, Mexico AB - The Guanajuato Mining District, once one of the major silver producers in the world, has been exploited for silver and gold from low-sulfidation quartz- and calcite-rich epithermal veins since 1548. Currently, there are some 150 million tonnes of low-grade ore piles and mine-waste material (mostly tailings) piles, covering a surface area of 15 to 20 km(2) scattered in a 100-km(2) region around the city of Guanajuato. Most of the historic tailings piles were not deposited as formal tailings impoundments. They were deposited as simple valley-filling piles without concern for environmental issues. Most of those historical tailings piles are without any vegetation cover and undergo strong eolian and hydrologic erosion, besides the natural leaching during the rainy season (which can bring strong thunderstorms and flash flows). There is public concern about possible contamination of the local aquifer with heavy metals (Fe, Mn, Zn, As and Se) derived from the mining activities. Experimental and field data from this research provide strong geochemical evidence that most of the mine-waste materials derived from the exploitation of the epithermal veins of the region have very low potential for generation of acid mine drainage due to the high carbonate/sulfide ratio (12:1), and very low potential for leaching of heavy metals into the groundwater system. Furthermore, geochemical evidence (experimental and modeled) indicates that natural processes, like metal adsorption onto Fe-oxy-hydroxides surfaces, control the mobility of dissolved metals. Stable isotope data from surface water, groundwater wells (150-m depth) and mine-water (300- to 500-m depth) define an evaporation line (deltaD=5.93 delta(18)O = 13.04), indicating some deep infiltration through a highly anisotropic aquifer with both evaporated water (from the surface reservoirs) and meteoric water (not evaporated). Zinc concentrations in groundwater (0.03 to 0.5 ppm) of the alluvial aquifer, some 15 km from the mineralized zone, are generally higher than Zn concentrations in experimental tailings leachates that average less than 0.1 ppm. Groundwater travel time from the mineralized area to the alluvial valley is calculated to range from 50 to several hundred years. Thus, although there has been enough time for Zn sourced from the tailings to reach the valley, Zn concentrations in valley groundwater could be due to natural dissolution processes in the deep portions of the epithermal veins. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Geology;Mining & Mineral Processing U5 - J;Review AV - English IS - 0169-1368 UR - ISI:000186690500009 L2 - environmental geochemistry;mine tailings;groundwater;heavy metals;Guanajuato;Mexico;MINE; USA; REMEDIATION; ADSORPTION; BEHAVIOR; DRAINAGE; OXIDES; PB SO - Ore Geology Reviews 2003 ;23(3-4):277-297 7628 UI - 7103 AU - Carrion FJ AU - Doyle JF AU - Lozano A AD - Inst Mexicano Transporte, Queretaro 76700, MexicoPurdue Univ, Aeronaut & Aerosp Dept, W Lafayette, IN, USAConsejo Ciencia & Tecnol Estado queretaro, Queretaro 76000, MexicoCarrion, FJ, Inst Mexicano Transporte, Km 12000 Carretera Queretaro Galindo,Sanfandila M, Queretaro 76700, Mexico TI - Structural health monitoring and damage detection using a sub-domain inverse method AB - Health monitoring of modern complex structures poses new challenges as regards increased safety and operational reliability, while recent sensor technology opens up many possibilities for previously undreamt of methods of analysis. The need for different schemes or algorithms for damage detection, remote monitoring and continuous real time evaluation is increasingly pressing. In this work, a sub-domain inverse method based on the analysis of the wave propagation in structures is used for the identification of the damage response vectors, with an adapted minimum rank perturbation formulation for the calculation of the perturbation stiffness matrix of a damaged structure. Results show that simple experimental procedures can be utilized and several strategies can be adopted for fast monitoring or detailed analysis. Analyses in sub-regions or complete structures are possible and testing can be done under random excitations and with structural non-linear behaviour or unknown structural parameters. The proposed method of using smart structures with many embedded sensors is potentially useful for structural health monitoring and damage detection with almost no limitation on the type or distribution of the sensors MH - Mexico|Queretaro MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0964-1726 UR - ISI:000186246600015 L2 - NONDESTRUCTIVE EVALUATION; IDENTIFICATION; BRIDGE; SYSTEMS; SOLVER SO - Smart Materials & Structures 2003 ;12(5):776-784 7629 UI - 8389 AU - Casanueva E AU - Viteri FE AD - Univ Calif Berkeley, Dept Nutrit Sci & Toxicol, Berkeley, CA 94720, USAInst Nacl Perinatol, Mexico City, DF, MexicoCHORI, Berkeley, CA 94720, USAViteri, FE, Univ Calif Berkeley, Dept Nutrit Sci & Toxicol, Berkeley, CA 94720 USA TI - Iron and oxidative stress in pregnancy AB - Pregnancy, mostly because of the mitochondria-rich placenta, is a condition that favors oxidative stress. Transitional metals, especially iron, which is particularly abundant in the placenta, are important in the production of free radicals. Protective mechanisms against free radical generation and damage increase throughout pregnancy and protect the fetus, which, however, is subjected to a degree of oxidative stress. Oxidative stress peaks by the second trimester of pregnancy, ending what appears to be a vulnerable period for fetal health and gestational progress. Conditions restricted to pregnancy, such as gestational hypertension, insulin, resistance and diabetes, exhibit exaggerated indications of free radical damage, Antioxidants as well as avoidance of iron excess ameliorate maternal and early fetal: damage. In rats both iron deficiency and excess result in free radical mitochondrial damage. Estimates of gestational iron requirements and of the proportion of iron absorbed, from different iron supplemental doses suggest that with present supplementation schemes the intestinal mucosal cells are constantly exposed to unabsorbed iron excess and oxidative stress. Unpublished work carried out in Mexico City with nonanemic women at midpregnancy indicates that 60 mg/d of iron increases the risk of hemoconcentration, low birth weight and premature birth and produces a progressive decline in plasma copper. These risks are not observed in women supplemented with 120 mg iron once or twice per week. Studies on the influence of iron supplementation schemes on oxidative stress are needed MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 25 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000183011400016 L2 - iron;supplementation;pregnancy;oxidative stress;GESTATIONAL DIABETES-MELLITUS; LIPID-PEROXIDATION PRODUCTS; VITAMIN-C SUPPLEMENTATION; MESSENGER-RNA EXPRESSION; NITRIC-OXIDE SYNTHASE; TUMOR-NECROSIS-FACTOR; SUPEROXIDE-DISMUTASE; HUMAN-PLACENTA; GASTROINTESTINAL-TRACT; GLUTATHIONE-PEROXIDASE SO - Journal of Nutrition 2003 ;133(5):1700S-1708S 7630 UI - 8808 AU - Casanueva E AU - Pfeffer F AU - Drijanski A AU - Fernandez-Gaxiola AC AU - Gutierrez-Valenzuela V AU - Rothenberg SJ AD - Natl Publ Hlth Inst, Cuernavaca, Morelos, MexicoNatl Inst Perinatol, Mexico City, DF, MexicoDrew Univ Med & Sci, Los Angeles, CA, USACasanueva, E, Montes Urales 800,2o Piso,Torre Invest, Mexico City 11000, DF, Mexico TI - Iron and folate status before pregnancy and anemia during pregnancy AB - Background. A lack of information about the role that iron and folate stores (erythrocyte folate) play on the anemia incidence in pregnant women. Objective: To evaluate the predictive value of ferritin and erythrocyte folate before pregnancy in relationship to the incidence of anemia throughout pregnancy. Methods: Thirty-five non-anemic non-pregnant women were evaluated 1 or 2 months before the pregnancy. After becoming pregnant they were evaluated every 4 weeks starting in the 8th week of pregnancy until 1 month post-partum. Every evaluation included determination of hemoglobin, ferritin and erythrocyte folate. Results: When the women started gestation with an insufficient iron store (<20 mug/l), the trend was to present anemia at significantly earlier gestational ages, in such a way that at week 20 of gestation almost 60% of the women with an inadequate store had anemia and only 25% of the women with an adequate store had this condition. On the other hand, the pregestational erythrocyte folate did not predict anemia incidence. Conclusions: Pregestational ferritin concentration predicts value of incidence of anemia throughout pregnancy. Copyright (C) 2003 S. Karger AG, Basel MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 8 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 0250-6807 UR - ISI:000182015100003 L2 - iron stores;folate stores;anemia;pregnancy;ferritin;SUPPLEMENTATION; DEFICIENCY; WOMEN SO - Annals of Nutrition and Metabolism 2003 ;47(2):60-63 7631 UI - 7271 AU - Casini H AU - Montemayor R AU - Urrutia LF AD - Abdus Salam Int Ctr Theoret Phys, High Energy Sect, I-34100 Trieste, ItalyInst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, CAB, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaComis Nacl Energia Atom, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoCasini, H, Abdus Salam Int Ctr Theoret Phys, High Energy Sect, I-34100 Trieste, Italy TI - Duality for symmetric second rank tensors. II. The linearized gravitational field AB - The construction of dual theories for linearized gravity in four dimensions is considered. Our approach is based on the parent Lagrangian method previously developed for the massive spin-two case, but now considered for the zero mass case. This leads to a dual theory described in terms of a rank two symmetric tensor, analogous to the usual gravitational field, and an auxiliary antisymmetric field. This theory has an enlarged gauge symmetry, but with an adequate partial gauge fixing it can be reduced to a gauge symmetry similar to the standard one of linearized gravitation. We present examples illustrating the general procedure and the physical interpretation of the dual fields. The zero mass case of the massive theory dual to the massive spin-two theory is also examined, but we show that it only contains a spin-zero excitation MH - Argentina MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185830200062 L2 - ABELIAN GAUGE-THEORIES; S-DUALITY; MASS; QUANTIZATION; VORTICES; STRINGS; ANALOG; CHARGE; SPACE SO - Physical Review D 2003 ;68(6): 7632 UI - 8657 AU - Castaneda RF AU - Iturriaga RT AU - Minter DW AU - Saikawa M AU - Vidal G AU - Velazquez-Noa S AD - Inst Invest Fundamentales Agr Trop Alejandro De H, INIFAT, Havana 17200, CubaUniv Simon Bolivar, Dept Biol Organ, Baruta, Edo Miranda, VenezuelaCABI Biosci, Int Mycol Inst, Egham TW20 9TY, Surrey, EnglandTokyo Gakugei Univ, Dept Biol, Koganei, Tokyo 184, JapanUniv Nacl Autonoma Mexico, Fac Ciencia, Herbarium, Mexico City 04510, DF, MexicoCastaneda, RF, Inst Invest Fundamentales Agr Trop Alejandro De H, INIFAT, Calle 1 Esq 2,Santiago Las Vegas, Havana 17200, Cuba TI - Microfungi from Venezuela. A new species of Brachydesmiella, a new combination, and new records AB - Brachydesmiella eugecapiellana anam. sp. nov., found on decaying fallen leaves of Nectandra sp. in a cloud forest from Venezuela, is described and illustrated. This is characterized by navicular, ampulliform to narrow fusiform, rostrate, 2-3septate, verruculose, very pale brown conidia: Selenodriella ponmudiensis comb. nov. is proposed. Some microfungi are recorded from cloud forests in Venezuela MH - Cuba MH - United Kingdom MH - Japan MH - Mexico|Distrito Federal MH - Venezuela PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000182336900020 L2 - Selenodriella;hyphomycetes;leaf litter;systematics;tropical fungi SO - Mycotaxon 2003 ;85():211-229 7633 UI - 9323 AU - Castelan-Ortega OA AU - Fawcett RH AU - rriaga-Jordan C AU - Herrero M AD - Univ Autonoma Estado Mexico, Ctr Invest Ciencias Agropecuarias, Inst Literario 100, Toluca 50000, MexicoUniv Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JG, Midlothian, ScotlandILRI, Nairobi, KenyaCastelan-Ortega, OA, Univ Autonoma Estado Mexico, Ctr Invest Ciencias Agropecuarias, Inst Literario 100, Toluca 50000, Mexico TI - A decision support system for smallholder campesino maize-cattle production systems of the Toluca Valley in Central Mexico. Part I - Integrating biological and socio-economic models into a holistic system AB - The objective of this work was to develop a Decision-Support System (DSS) in order to support the decision making process. by campesino farmers of Central Mexico. Two biological models, one socio-economic model and a survey database form the DSS. The CERES-Maize model simulated the yield response of three local land-races of maize to different management systems. The second biological model, a cow model (dynamic hybrid model), was used to simulate alternative feeding systems. A multi-period mathematical programming model integrated the-outputs of the previous models with the survey database. This model was used to find the optimal combination of resources and technologies that maximised farmers' income. This model consists of 15,698 structural columns and 612 rows. The DSS successfully reproduced the functioning of the farming system's main components. More importantly, it simulated the complex interactions. observed between the farmers and their crops and cattle, including traditional maize management practices. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Kenya MH - Mexico|Estado De Mexico MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0308-521X UR - ISI:000180807700001 L2 - Decision Support Systems;biological simulation models;campesino farmers;socio-economic simulation models SO - Agricultural Systems 2003 ;75(1):1-21 7634 UI - 9324 AU - Castelan-Ortega OA AU - Fawcett RH AU - rriaga-Jordan C AU - Herrero M AD - Univ Autonoma Estado Mexico, Ctr Invest Ciencias Agropecuarias, Inst Literario 100, Toluca 50000, MexicoUniv Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JG, Midlothian, ScotlandILRI, Nairobi, KenyaCastelan-Ortega, OA, Univ Autonoma Estado Mexico, Ctr Invest Ciencias Agropecuarias, Inst Literario 100, Toluca 50000, Mexico TI - A decision support system for smallholder campesino maize-cattle production systems of the Toluca Valley in Central Mexico. Part II - Emulating the farming system AB - This paper describes the functioning and validation of the Decision Support Systems described in the first part of the paper. The DSS ran three case studies with different farm sizes that represent the range of farmers found in the Valley. The DSS results were validated against survey data for the same cases. Traditional technologies for maize and milk production were reproduced by the DSS including land use and cattle feeding systems. The generic nature of the DSS was demonstrated as well as its capacity to deal with the system's socioeconomic and biological aspects. The results suggest that the DSS was successful in reproducing the functioning of the farming system's main components. More importantly it simulated the complex interactions observed between the farmers and their crops and cattle. Finally, it is acknowledged that despite the size and complexity of the DSS, it only was able to emulate the functioning of the main components of the farming system. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Kenya MH - Mexico|Estado De Mexico MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0308-521X UR - ISI:000180807700002 L2 - model validation;campesino farmers;traditional technologies;cattle feeding systems SO - Agricultural Systems 2003 ;75(1):23-46 7635 UI - 7505 AU - Castellanos-Guzman AG AU - Czank M AD - Univ Guadalajara, Lab Invest Mat, DIP, CUCEI, Guadalajara 44281, Jalisco, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCastellanos-Guzman, AG, Univ Guadalajara, Lab Invest Mat, DIP, CUCEI, Apdo Postal 2-638, Guadalajara 44281, Jalisco, Mexico TI - Transmission electron and optical microscopy of the domain structure in ferroic Co3B7O13Cl boracite AB - The ferroic domain structure of Co-3 B-7 O13Cl boracite single crystals has been investigated by transmission electron microscopy (TEM) in conjunction with polarised-light microscopy (PLM). TEM studies revealed the existence of microtwins lamellae with (001) as twin plane MH - Germany MH - Mexico|Jalisco PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000185296000003 L2 - boracites;ferroelectricity;ferroelasticity;domains;polarized light microscopy and transmission electron microscopy SO - Ferroelectrics 2003 ;290():15-22 7636 UI - 8590 AU - Castellanos-Ramos JZ AU - Guzman-Maldonado H AU - costa-Gallegos K AU - costa-Gallegos JA AD - INIFAP, Bean Program, Celaya 38000, Gto, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Apartado Postal 112, Celaya 38000, Gto, Mexico TI - Registration of 'Flor de Junio Marcela' common bean MH - Mexico|Guanajuato MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000182540300048 SO - Crop Science 2003 ;43(3):1121-1122 7637 UI - 6701 AU - Castellanos MR AU - Aguiar J AU - Fernandez CI AU - Almaguer W AU - Mejias C AU - Varela A AD - Int Ctr Neurol Restorat, Havana, CubaCtr Genet Engn & Biotechnol, Havana, CubaNatl Autonomous Univ Mexico, Inst Neurobiol, Queretaro, MexicoCastellanos, MR, Int Ctr Neurol Restorat, Havana, Cuba TI - Evaluation of the neurorestorative effects of the murine beta-nerve growth factor infusions in old rat with cognitive deficit AB - The nerve growth factor (NGF) is known to participate in the regulation of the expression levels and activity of the choline acetyltransferase (ChAT) in the nervous system. This enzyme is sensitive to the degenerative changes found in Alzheimer's disease (AD). We compared the effectiveness of intraparenchymal (ip) and intracerebroventricular (icv) administration of the murine beta-NGF (beta-NGFm) produced in our laboratories, through the determination of the expression levels and activity of the ChAT, and the evaluation of behavioral recovery in aged rat with cognitive deficit. Our results indicated that icv infusion of beta-NGFm stimulates the expression levels of ChAT gene in the striatum of old rats. Remarkable losses in the ChAT activity were observed in the septum and striatum of old rats. Exogenous administration of beta-NGFm produced a significant increase of ChAT activity in these brain regions differentially according to the administration pathway. The behavioral studies demonstrated that the administration pathway is an important factor in order to obtain the best results for a neurorestorative treatment. (C) 2003 Elsevier Inc. All rights reserved MH - Cuba MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000187252300001 L2 - murine beta-NGF;intracerebroventricular;intraparenchymal;ChAT activity;ChAT mRNA;behavioral recovery;neurorestoration;VESICULAR ACETYLCHOLINE TRANSPORTER; CHOLINE-ACETYLTRANSFERASE ACTIVITY; LONG-TERM POTENTIATION; SPATIAL RECENT MEMORY; MORRIS WATER MAZE; BASAL FOREBRAIN; AGED RATS; NEUROTROPHIC FACTORS; NEURONAL PLASTICITY; ALZHEIMERS-DISEASE SO - Biochemical and Biophysical Research Communications 2003 ;312(4):867-872 7638 UI - 7054 AU - Castelletti G AU - Dubner G AU - Golap K AU - Goss WM AU - Velazquez PF AU - Holdaway M AU - Rao AP AD - Univ Buenos Aires, CONICET, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaNatl Radio Astron Observ, Socorro, NM 87801, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Radio Astron Observ, Tucson, AZ 85721, USANatl Ctr Radio Astrophys, Pune 411007, Maharashtra, IndiaCastelletti, G, Univ Buenos Aires, CONICET, Inst Astron & Fis Espacio, CC 67, RA-1428 Buenos Aires, DF, Argentina TI - New high-resolution radio observations of the supernova remnant CTB 80 AB - We report new high-resolution and high-sensitivity radio observations of the extended supernova remnant (SNR) CTB 80 (G69.0+2.7) at 240, 324, 618, and 1380 MHz. The imaging of CTB 80 at 240 and 618 MHz was performed using the Giant Metrewave Radio Telescope in India. The observations at 324 and 1380 MHz were obtained using the Very Large Array of the National Radio Astronomy Observatory in its C and D configurations. The new radio images reveal faint extensions for the asymmetric arms of CTB 80. The arms are irregular, with. laments and clumps of size 1' (or 0.6 pc at a distance of 2 kpc). The radio image at 1380 MHz is compared with IR and optical emission. The IR-radio correspondence is excellent along the north arm of CTB 80. Ionized gas observed in the [S II] line perfectly matches the west and north edges of CTB 80. The central nebula associated with the pulsar PSR B1951+32 was investigated with an angular resolution of 10"x6". The new radio image obtained at 618 MHz shows with superb detail structures in the 8'x4' east-west "plateau'' nebula that hosts the pulsar on its western extreme. A twisted. lament, about 6' in extent (similar to3.5 pc), trails behind the pulsar in an approximate west-east direction. In the bright "core'' nebula (size similar to45"), located to the west of the plateau, the images show a distortion in the morphology toward the west; this feature corresponds to the direction in which the pulsar escapes from the SNR with a velocity of similar to240 km s(-1). Based on the new observations, the energetics of the SNR and of the pulsar wind nebula are investigated MH - Argentina MH - India MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000186494200003 L2 - ISM : individual (CTB 80);pulsars : individual (PSR B1951+32);radio continuum;stars : neutron;supernova remnants;LINEAR POLARIZATION; INFRARED-EMISSION; PSR B1951+32; X-RAY; H-I; PULSAR; CTB80; CM; CONTINUUM; INTENSITY SO - Astronomical Journal 2003 ;126(5):2114-2124 7639 UI - 7558 AU - Castello R AU - Mili R AD - Univ Texas, Dept Comp Sci, Richardson, TX 75083, USAITESM Campus Chihuahua, Dept Comp Sci, Chihuahua 31300, MexicoMili, R, Univ Texas, Dept Comp Sci, Box 830688, Richardson, TX 75083 USA TI - Visualizing graphical and textual formalisms AB - ViSta is a tool suite designed to support the requirements specification of reactive systems. It guides the user through the steps necessary for the visualization of statechart diagrams from an informal document. The user first extracts information from a textual document and stores into a set of interactive templates. The information is used by the tool to automatically generate statechart layouts. In this paper we describe how ViSta is augmented with a tool that automatically translates statecharts into Z specifications. The template, statechart and Z representations are interrelated. This ensures consistency between the different representations, and therefore facilitates the verification and validation effort. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Chihuahua MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Information Systems U5 - J;Article AV - English IS - 0306-4379 UR - ISI:000185156700003 L2 - STATECHARTS SO - Information Systems 2003 ;28(7):753-768 7640 UI - 8526 AU - Castillo-Ortega MM AU - Del Castillo-Castro T AU - Encinas JC AU - Perez-Tello M AU - De Paoli MA AU - Olayo G AD - Univ Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoUniv Sonora, Dept Ingn Quim & Met, Hermosillo 83000, Sonora, MexicoUniv Estadual Campinas, Lab Polimeros Condutores & Reciclagem, Inst Quim, BR-13083970 Campinas, SP, BrazilUniv Autonoma Metropolitana, Dept Fis, Mexico City 09340, DF, MexicoCastillo-Ortega, MM, Univ Sonora, Dept Invest Polimeros & Mat, Apartado Postal 130, Hermosillo 83000, Sonora, Mexico TI - Electrically conducting polyaniline-PBMA composite films obtained by extrusion AB - Poly(n-butyl methacrylate) (PBMA)-polyaniline (PANI) composite films were obtained by extrusion by use of two methods: the first method consisted of polymerizing a thin layer of PANI, with Cl- as dopant, on the extruded film of PBMA; the second method was based on blends of PBMA and PANI produced by the extrusion of the two polymers by using dodecylbenzene sulfonic acid (DBSA) as dopant. The thermal properties, electrical conductivity, and morphology of the composite films obtained were measured. The sensitivity of the composites films as detectors of hydrogen peroxide and ammonia was evaluated. The change in the electrical resistance on exposure to different aqueous solutions of these components shows a linear behavior. (C) 2003 Wiley Periodicals, Inc MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 10 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000182709600021 L2 - composites;conducting polymers;extrusion;sensors;EMULSION POLYMERIZATION; POLYPYRROLE; SENSOR; DEPOSITION; AMMONIA; BLENDS SO - Journal of Applied Polymer Science 2003 ;89(1):179-183 7641 UI - 8655 AU - Castillo-Torres J AU - Hernandez J AU - Medrano C AU - Camarillo E AU - Murrieta H AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoETH Honggerberg, Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, SwitzerlandHernandez, J, Univ Nacl Autonoma Mexico, Inst Fis, POB 20-364, Mexico City 01000, DF, Mexico TI - Two-beam coupling measurements of anisotropic volume gratings in chromium-doped potassium niobate crystal AB - Empty traps concentration, the sign of the dominant photocarriers and the effective electro-optic coefficient in chromium doped potassium niobate single crystal using steady-state beam coupling at 532 nm, have been measured. A density of 0.7 x 10(-16) cm(-3) of positive photocarriers, r(eff) = 20 pm/V and (K) = 0.25 are obtained. To explain these results, anisotropic photoexcitation cross section of mobile charge carriers has to be considered. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000182288400010 L2 - photorefraction;anisotropic nonlinear absorption;Cr : KNbO3 crystal;KNBO3 CRYSTALS; ABSORPTION SO - Optical Materials 2003 ;22(3):251-256 7642 UI - 7479 AU - Castillo C AU - Mendoza BS AU - Schmidt WG AU - Hahn PH AU - Bechstedt F AD - AC Leon, Ctr Invest & Opt, Guanajuato, MexicoUniv Jena, Inst Festkorpertheorie & Theoret Opt, D-07743 Jena, GermanyCastillo, C, AC Leon, Ctr Invest & Opt, Guanajuato, Mexico TI - Layer-by-layer analysis of surface reflectance anisotropy in semiconductors AB - We propose a method to obtain the layer-resolved contributions to the reflectance anisotropy signal of semiconductor surfaces which are modeled using the slab approach. Following this method, a microscopic formulation based on the semiempirical tight-binding approach is used to calculate the reflectance anisotropy of two InP(001) surface structures possibly relevant to standard gas-phase epitaxy conditions. It is shown that (i) the elimination of the anisotropy signal from the bottom layers of the slab is essential to correctly compare with the experiment and (ii) the strong low-energy anisotropy characteristic for gas-phase-grown InP surfaces arises from the uppermost atomic layers MH - Germany MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000185239600014 L2 - DISCRETE DIPOLE CALCULATION; OPTICAL-PROPERTIES; SILICON; MODEL; SPECTROSCOPY; SPECTRUM; DIMERS; GAAS SO - Physical Review B 2003 ;68(4): 7643 UI - 8704 AU - Castillo F AU - Herrera JJE AU - Rangel J AU - Milanese M AU - Moroso R AU - Pouzo J AU - Golzarri JI AU - Espinosa G AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04511, DF, MexicoUniv Nacl Ctr Prov Buenos Aires, Fac Ciencias Exactas, Inst Fis Arroyo Seco, RA-7000 Tandil, ArgentinaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoHerrera, JJE, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Ciudad Univ,AP 70-543, Mexico City 04511, DF, Mexico TI - Isotropic and anisotropic components of neutron emissions at the FN-II and PACO dense plasma focus devices AB - The average angular distribution of neutron emissions has been measured in the Fuego Nuevo II (FN-II) dense plasma focus device (5 kJ) by means of CR-39 plastic nuclear track detectors. When pure deuterium is used as the filling gas, the data can be adjusted to a Gaussian function, related to anisotropic emission, superposed on a constant pedestal, related to isotropic emission. When deuterium-argon admixtures are used, the anisotropic contribution is best represented by a parabola. The same analysis is applied to previously reported results, for fewer shots, in pure deuterium from the PACO device, which is similar in size to the FN-II. In both devices the anisotropic component is smaller than the isotropic one, but with different features. In PACO the anisotropic component is concentrated on a large narrow beam around the axis, but its contribution to the total neutron yield is significantly smaller than in the FN-II, where the anisotropic component spreads over a wider range. The neutron flux per shot is monitored in both devices with calibrated silver activation detectors, at 20degrees and at 90degrees from the axis. The average values of the neutron flux at these two angles are used, along with the angular distributions obtained form the track detectors, in order to estimate the absolute neutron yield of both the isotropic and the anisotropic contributions. From examining different groups of shots, it is found that the shape of the angular distribution is important in the estimation of anisotropy, and that the value usually reported, as the ratio of neutron counts head-on and side-on, as measured by activation counters, may be misleading MH - Argentina MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Physics, Fluids & Plasmas;Physics, Nuclear U5 - J;Article AV - English IS - 0741-3335 UR - ISI:000182093600010 L2 - NUCLEAR TRACK DETECTORS; ION-BEAM; RADIATION; CR-39; PROTONS SO - Plasma Physics and Controlled Fusion 2003 ;45(3):289-300 7644 UI - 6825 AU - Castillo M AU - Acevedo P AU - Moreno E AD - UNAM, IIMAS, DISCA, Mexico City 01000, DF, MexicoCITMA, ICIMAF, Ctr Ultrason, Havana 10400, CubaAcevedo, P, UNAM, IIMAS, DISCA, Apdo Postal 20-726 Admon,20 Del Alvaro Obregon, Mexico City 01000, DF, Mexico TI - KLM model for lossy piezoelectric transducers AB - A KLM model has been developed using equivalent circuits to analyze the effects of different loss mechanisms on the transducer performance in the time and frequency domain. Transducers from two different piezoelectric materials (lead-zirconate-titanate (PZT) and polyvinylidene fluoride) were constructed to validate our model. Experimental results are in good agreement with the theoretical simulation. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Acoustics;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0041-624X UR - ISI:000186795100009 L2 - KLM models;PZT;PVDF;ultrasonic transducers SO - Ultrasonics 2003 ;41(8):671-679 7645 UI - 8579 AU - Castonguay D AU - de la Pena JA AD - UNAM, Inst Matemat, Mexico City 04510, DF, MexicoUniv Sherbrooke, Fac Sci, Dept Math & Informat, Sherbrooke, PQ J1K 2R1, Canadade la Pena, JA, UNAM, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - On the inductive construction of Galois coverings of algebras MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000182616100004 L2 - SIMPLY CONNECTED ALGEBRAS; REPRESENTATION TYPE SO - Journal of Algebra 2003 ;263(1):59-74 7646 UI - 7091 AU - Castro-Chavez F AU - Yechoor VK AU - Saha PK AU - Martinez-Botas J AU - Wooten EC AU - Sharma S AU - O'Connell P AU - Taegtmeyer H AU - Chan L AD - Baylor Coll Med, Sect Diabet Endocrinol & Metab, Dept Med, Houston, TX 77030, USABaylor Coll Med, Sect Diabet Endocrinol & Metab, Dept Mol & Cellular Biol, Houston, TX 77030, USAUniv Guadalajara, Dept Mol Biol Med, Civil Hosp Guadalajara, Univ Ctr Hlth Sci, Guadalajara, Jalisco, MexicoUniv Texas, Sch Med, Div Cardiol, Houston, TX, USAChan, L, Baylor Coll Med, Sect Diabet Endocrinol & Metab, Dept Med, 1 Baylor Plaza, Houston, TX 77030 USA TI - Coordinated upregulation of oxidative pathways and downregulation of lipid biosynthesis underlie obesity resistance in perilipin knockout mice - A microarray gene expression profile AB - Obesity is a major risk factor for diabetes and heart disease. We previously reported that the inactivation of the gene for perilipin (plin), an adipocyte lipid droplet surface protein, produced lean and obesity-resistant mice. To dissect the underlying mechanisms involved, we used oligonucleotide microarrays to analyze the gene-expression profile of white adipose tissue (WAT), liver, heart, skeletal muscle, and kidney of plin(-/-) and plin(+/+) mice. As compared with wild-type littermates, the WAT of plin(-/-) mice had 270 and 543 transcripts that were significantly up- or downregulated. There was a coordinated upregulation of genes involved in P-oxidation, the Krebs cycle, and the electron transport chain concomitant with a downregulation of genes involved in lipid biosynthesis. There was also a significant downregulation of the stearoyl CoA desaturase-1 gene, which has been associated with obesity resistance. Thus, in response to the constitutive activation of lipolysis associated with absence of perilipin, WAT activated pathways to rid itself of the products of lipolysis and activated pathways of energy expenditure that contribute to the observed obesity resistance. The biochemical pathways involved in obesity resistance in plin(-/-) mice identified in this study may represent potential targets for the treatment of obesity MH - Mexico|Jalisco MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0012-1797 UR - ISI:000186268100004 L2 - STEAROYL-COA DESATURASE; POLYUNSATURATED FATTY-ACIDS; ELEMENT-BINDING PROTEINS; PYRUVATE-DEHYDROGENASE KINASE; COENZYME-A DESATURASE; SQUALENE EPOXIDASE; LANOSTEROL 14-ALPHA-DEMETHYLASE; CHOLESTEROL-BIOSYNTHESIS; 3T3-L1 ADIPOCYTES; MOUSE-LIVER SO - Diabetes 2003 ;52(11):2666-2674 7647 UI - 8201 AU - Castro-Escarpulli G AU - Figueras MJ AU - guilera-Arreola G AU - Soler L AU - Fernandez-Rendon E AU - Aparicio GO AU - Guarro J AU - Chacon MR AD - Univ Rovira & Virgili, Microbiol Unitat, Dept Ciencies Med Basiques, Fac Med & Ciencies Salut, Reus 43201, SpainInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoFigueras, MJ, Univ Rovira & Virgili, Microbiol Unitat, Dept Ciencies Med Basiques, Fac Med & Ciencies Salut, San Llorenc 21, Reus 43201, Spain TI - Characterisation of Aeromonas spp. isolated from frozen fish intended for human consumption in Mexico AB - A total of 82 strains of presumptive Aeromonas spp. were identified biochemically and genetically (16S rDNA-RFLP). The strains were isolated from 250 samples of frozen fish (Tilapia, Oreochromis niloticus niloticus) purchased in local markets in Mexico City. In the present study, we detected the presence of several genes encoding for putative virulence factors and phenotypic activities that may play an important role in bacterial infection. In addition, we studied the antimicrobial patterns of those strains. Molecular identification demonstrated that the prevalent species in frozen fish were Aeromonas salmonicida (67.5%) and Aeromonas bestiarum (20.9%), accounting for 88.3% of the isolates, while the other strains belonged to the species Aeromonas veronii (5.2%), Aeromonas encheleia (3.9%) and Aeromonas hydrophila (2.6%). Detection by polymerase chain reaction (PCR) of genes encoding putative virulence factors common in Aeromonas, such as aerolysin/hemolysin, lipases including the glycerophospholipid-cholesterol acyltransferase (GOAT), serine protease and DNases, revealed that they were all common in these strains. Our results showed that first generation quinolones and second and third generation cephalosporins were the drugs with the best antimicrobial effect against Aeromonas spp. In Mexico, there have been few studies on Aeromonas and its putative virulence factors. The present work therefore highlights an important incidence of Aeromonas spp., with virulence potential and antimicrobial resistance, isolated from frozen fish intended for human consumption in Mexico City. (C) 2002 Elsevier Science B.V All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0168-1605 UR - ISI:000183602600006 L2 - Aeromonas;Mexico;frozen fish;virulence factors;antimicrobial patterns;16S rRNA-RFLP;MOTILE AEROMONAS; FRESH-WATER; EXTRACELLULAR PROTEASES; ENVIRONMENTAL SOURCES; ANTIMICROBIAL AGENTS; VIRULENCE FACTORS; ESCHERICHIA-COLI; GENUS AEROMONAS; SALMONID FISH; RETAIL FOODS SO - International Journal of Food Microbiology 2003 ;84(1):41-49 7648 UI - 6912 AU - Castro-Gomez R AU - Rogers WJ AU - Holste JC AU - Hall KR AU - Iglesias-Silva GA AD - Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, MexicoHall, KR, Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USA TI - Experimental P-T-p and enthalpy-increment measurements of an equimolar mixture of trichlorofluoromethane (R-11) plus dichlorodifluoromethane (R-12) AB - We have measured experimental liquid densities and enthalpy increments for an equimolar mixture of trichlorofluoromethane (R-11) + dichlorodifluoromethane (R-12). We have used a continuously weighed pycnometer for measuring the liquid densities and a thermoelectric flow calorimeter for measuring the enthalpy increments. The temperature range for all measurements is from (230 to 425) K. The experimental measurements range up to 69 MPa with the pycnometer and 6.8 MPa with the calorimeter, respectively MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000186579200013 L2 - FUNDAMENTAL EQUATION SO - Journal of Chemical and Engineering Data 2003 ;48(6):1432-1434 7649 UI - 8461 AU - Castro-Longoria E AD - Univ Southampton, Southampton Oceanog Ctr, Sch Ocean & Earth Sci, Southampton SO14 3ZH, Hants, EnglandCastro-Longoria, E, Ctr Invest Cient & Educ Super Ensenada, Unidad Biol Expt & Aplicada, Km 107 Carretera Tijuana Ensenada, Ensenada, Baja California, Mexico TI - Egg production and hatching success of four Acartia species under different temperature and salinity regimes AB - Egg production and hatching success of four Acartia species from the Solent-Southampton Water estuarine system were determined under different temperature (5-20degreesC) and salinity (15-35 psu) laboratory regimes. Fecundity typically increased with increasing temperature for all species, and hatching success was suppressed at 5degreesC and 10degreesC in all species. With respect to salinity, egg production patterns were more irregular, but some species produced fewer eggs at the lowest salinity tested. At a 24 h incubation period, some differences in hatching success were obtained at the different salinities tested. Results indicate that temperature plays an important role in the population dynamics of the congeneric group Acartia within the system and that salinity changes may also influence the fecundity of the species MH - United Kingdom MH - Mexico|Baja California PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 9 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000182931500006 L2 - COPEPOD EURYTEMORA-AFFINIS; BIFILOSA COPEPODA; PRODUCTION RATES; MARINE COPEPOD; TONSA DANA; TEMPORAL VARIABILITY; PLANKTONIC COPEPODS; SOUTHERN-CALIFORNIA; SOUTHAMPTON WATER; EAST LAGOON SO - Journal of Crustacean Biology 2003 ;23(2):289-299 7650 UI - 7642 AU - Castro-Rodriguez R AU - Palomares-Sanchez S AU - Watts BE AU - Leccabue F AD - IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, MexicoCNR Inst, IMEM, I-43010 Parma, ItalyUASLP, Inst Fis, San Luis Potosi 78000, SLP, MexicoCastro-Rodriguez, R, IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, Mexico TI - A simple model to study the perovskite phase formation of SrTiO3 deposited by pulsed laser ablation AB - A simple model to study the SrTiO3 perovskite phase formation as a function of the growth parameters by pulsed laser ablation deposition technique has been reported. This model takes into account mainly the equilibrium between the oxygen density and the density characteristic of the pulsed laser deposition (PLD) system. From the critical oxygen concentration of 0.6 for the SrTiO3 phase, the experimental parameters such as chamber partial pressure and substrate temperature were tailored according to model by adjusting the optimum growth conditions. The critical experimental parameters during the growth were determined: 0.1 mbar of the oxygen pressure and 750 degreesC of the substrate temperature. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|San Luis Potosi MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000184846900044 L2 - strontium titanate;ferroelectric thin films;pulsed laser deposition;THIN-FILMS SO - Materials Letters 2003 ;57(24-25):3958-3963 7651 UI - 7963 AU - Castro-Rodriguez R AU - Palomares-Sanchez S AU - Leccabue F AU - Arisi E AU - Watts BE AD - CINVESTAV, Dept Appl Phys, IPN, Medida Unit, Merida 97310, Yacatan, MexicoUASLP, Inst Fis, San Luis Potosi 78000, SLP, MexicoCNR, Ist IMEM, Area Sci 37a, I-43010 Fontanino Parma, ItalyCastro-Rodriguez, R, CINVESTAV, Dept Appl Phys, IPN, Medida Unit, Km 6 Antigua Carretera Progreso, Merida 97310, Yacatan, Mexico TI - Optimal target-substrate distance in the growth of oxides thin films by pulsed laser deposition AB - A simple model to investigate the formation of the oxide phase during the growth of ternary oxides films by laser ablation deposition has been proposed. Since the crystallinity properties of the oxide films are subject to the oxygen stoichiometry, the model is based on the balance between the density of the oxygen and a characteristic density of the system, delta = 3N(0)/L-0(3), in order to scale the optimal target-substrate distance, L-0. The interaction plume-laser is not considered. The model was applied for growing PbFe12O19 hexaferrite thin film, and it shows that the theoretical conditions found are near to the optimal ones for the film growth. According to the model, for a fixed oxygen pressure of 1.0 mbar and a substrate temperature of 700 degreesC, a target-substrate distance, L-0 approximate to 3.1 cm, corresponding to a critical density of oxygen, n(g)=2.74 X 10(15) cm(-3), has been determined. The films show a high degree of c-axis orientation, high crystallographic quality and a proper stoichiometry. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|San Luis Potosi MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000184050700003 L2 - thin films;magnetic materials;pulsed laser ablation;atomic force microscopic;ABLATION; DYNAMICS SO - Materials Letters 2003 ;57(22-23):3320-3324 7652 UI - 2986 AU - Castro-Villegas MC AU - Perez-Guljo VC AU - Escudero A AU - Caracuel MA AU - Munoz-Villanueva MC AU - Morote G AU - Martinez FG AU - Font P AU - Casasola JC AU - Collantes E AD - Hosp Univ Reina Sofia, Res Unit, Cordoba, ArgentinaGen Hosp, Mexico City, DF, Mexico TI - Our experience in treatment with infliximab in rheumatoid arthritis patients. Clinical and health-related quality of life results at 30 weeks MH - Argentina MH - Mexico|Distrito Federal PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551401416 SO - Annals of the Rheumatic Diseases 2003 ;62():425-425 7653 UI - 7255 AU - Castro A AU - Frauel Y AU - Tepichin E AU - Javidi B AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicades & Sistemas, Mexico City 01000, DF, MexicoUniv Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269, USACastro, A, Inst Nacl Astrofis Opt & Elect, Apdo Postal 51,Puebla, Puebla 72000, Mexico TI - Pose estimation from a two-dimensional view by use of composite correlation filters and neural networks AB - We present a technique to estimate the pose of a three-dimensional object from a two-dimensional view. We first compute the correlation between the unknown image and several synthetic-discriminant-function filters constructed with known views of the object. We consider both linear and nonlinear correlations. The filters are constructed in such a way that the obtained correlation values depend on the pose parameters. We show that this dependence is not perfectly linear, in particular for nonlinear correlation. Therefore we use a two-layer neural network to retrieve the pose parameters from the correlation values. We demonstrate the technique by simultaneously estimating the in-plane and out-of-plane orientations of an airplane within an 8-deg portion. We show that a nonlinear correlation is necessary to identify the object and also to estimate its pose. On the other hand, linear correlation is more accurate and more robust. A combination of linear and nonlinear correlations gives the best results. (C) 2003 Optical Society of America MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000185928000009 L2 - PATTERN-RECOGNITION; ORIENTATION ESTIMATION; CHARACTER RECOGNITION; IMAGE; NOISE; DISCRIMINATION; TARGET SO - Applied Optics 2003 ;42(29):5882-5890 7654 UI - 8857 AU - Castro A AU - Clapp M AD - Univ Texas, Dept Math Appl, San Antonio, TX 78249, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoCastro, A, Univ Texas, Dept Math Appl, San Antonio, TX 78249, USA TI - The effect of the domain topology on the number of minimal nodal solutions of an elliptic equation at critical growth in a symmetric domain AB - We consider the Dirichlet problem Deltau + lambdau + \u\(2*-2)u = 0 in Omega, u = 0 on thetaOmega where Omega is a bounded smooth domain in R-N, N greater than or equal to 4, and 2* = 2N/(N - 2) is the critical Sobolev exponent. We show that if Omega is invariant under an orthogonal involution then, for lambda > 0 sufficiently small, there is an effect of the equivariant topology of Omega on the number of solutions which change sign exactly once MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 18 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0951-7715 UR - ISI:000181842900013 L2 - POSITIVE SOLUTIONS; EXPONENTS; EXISTENCE SO - Nonlinearity 2003 ;16(2):579-590 7655 UI - 7043 AU - Castro AJ AU - Chen XM AU - Corey A AU - Filichkina T AU - Hayes PM AU - Mundt C AU - Richardson K AU - Sandoval-Islas S AU - Vivar H AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USAUniv Republ, Dr Mario A Cassinoni Fac Agron, Dept Prod Vegetal, Est Exp, Paysandu 60000, UruguayWashington State Univ, USDA ARS, Pullman, WA 99164, USAOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USACol Postgrad, Inst Fitosanidad, Chapingo, MexicoCIMMYT, ICARDA, Mexico City 06600, DF, MexicoHayes, PM, Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA TI - Pyramiding and validation of quantitative trait locus (QTL) alleles determining resistance to barley stripe rust: Effects on adult plant resistance AB - The use of molecular and quantitative trait locus (QTL) analysis tools initially lent support to the idea that relatively few genetic factors were the principal determinants of complex traits, including quantitative resistance (QR) to plant diseases. However, there are concerns regarding bias in QTL estimation and reproducibility of QTL effects in different genetic backgrounds. We are interested in mapping determinants of QR, and pyramiding resistance alleles at QTL loci may lead to durable resistance as well as provide independent validation of QTL effects and estimation of QTL interactions. We used molecular marker information to validate effects of resistance alleles at three QTL conferring QR to barley stripe rust (caused by Puccinia striiformis West. f. sp. hordei). Two of the QTL [one on chromosome 4(4H) and one on chromosome 7(5H) ] trace to one parent, while another QTL on chromosome 5(1H) traces to a different parent. The pyramids of these QR alleles provide independent estimates of QTL effects, influence of genetic background on QTL effects, QTL X QTL interaction, and QTL X environment interaction. Our results validate QTL effect estimates, showing that a small number of QTL explained 94% of the genetic variation in trait expression in a new genetic background. Original QTL estimates were quantitatively biased, but that did not preclude the achievement of selection responses. We also confirmed the additive effects of the QTL alleles, as well as the consistent effects of QTL alleles across environments MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - Uruguay MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000186477700046 L2 - DISEASE RESISTANCE; HORDEUM-VULGARE; GENES; PROGRESS SO - Crop Science 2003 ;43(6):2234-2239 7656 UI - 7260 AU - Castro AJ AU - Capettini F AU - Corey AE AU - Filichkina T AU - Hayes PM AU - Kleinhofs A AU - Kudrna D AU - Richardson K AU - Sandoval-Islas S AU - Rossi C AU - Vivar H AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USAUniv Republ, Fac Agron, Est Exp Dr Mario A Cassinoni, Paysandu 60000, UruguayCIMMYT, ICARDA, Mexico City 06600, DF, MexicoWashington State Univ, Dept Crop & Soil Sci, Pullman, WA 99164, USAColegio Postgrad, Inst Fitosanidad, Montecillo 56230, MexicoUniv Arizona, Arizona Genom Inst, Tucson, AZ 85721, USAHayes, PM, Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA TI - Mapping and pyramiding of qualitative and quantitative resistance to stripe rust in barley AB - The identification and location of sources of genetic resistance to plant diseases are important contributions to the development of resistant varieties. The combination of different sources and types of resistance in the same genotype should assist in the development of durably resistant varieties. Using a doubled haploid (DH), mapping population of barley, we mapped a qualitative resistance gene (Rpsx) to barley stripe rust in the accession CI10587 (PI 243183) to the long arm of chromosome 1(7H). We combined the Rpsx gene, through a series of crosses, with three mapped and validated barley stripe rust resistance QTL alleles located on chromosomes 4(4H) (QTL4), 5(1H) (QTL5), and 7(5H) (QTL7). Three different barley DH populations were developed from these crosses, two combining Rpsx with QTL4 and QTL7, and the third combining Rpsx with QTL5. Disease severity testing in four environments and QTL mapping analyses confirmed the effects and locations of Rpsx, QTL4, and QTL5, thereby validating the original estimates of QTL location and effect. QTL alleles on chromosomes 4(4H) and 5(1H) were effective in decreasing disease severity in the absence of the resistance allele at Rpsx. Quantitative resistance effects were mainly additive, although magnitude interactions were detected. Our results indicate that combining qualitative and quantitative resistance in the same genotype is feasible. However, the durability of such resistance pyramids will require challenge from virulent isolates, which currently are not reported in North America MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Uruguay MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000185117600019 L2 - barley;stripe rust;quantitative resistance;QTL;MARKER-ASSISTED SELECTION; HORDEUM-VULGARE; DISEASE-RESISTANCE; LINKAGE MAP; GENES; VIRULENCE; WHEAT; RICE SO - Theoretical and Applied Genetics 2003 ;107(5):922-930 7657 UI - 7503 AU - Castro GL AU - Mariano A AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoNatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaMariano, A, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Unstable particles, gauge invariance and the Delta(++) resonance parameters AB - The elastic and radiative pi(+)p scattering are studied in the framework of an effective Lagrangian model for the Delta(++) resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Delta(++)) and background contributions (rho(0), sigma, Delta, and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the D++ obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative pi(+) p scattering is mu(Delta++)=(6.14 +/- 0.51) nuclear magnetons MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0015-9018 UR - ISI:000185207900004 L2 - MAGNETIC-MOMENTS; CROSS-SECTIONS; FIELD THEORY; SCATTERING SO - Foundations of Physics 2003 ;33(5):719-734 7658 UI - 7219 AU - Castro M AU - Cruz J AU - Otazo-Sanchez E AU - Perez-Marin L AD - Univ Nacl Autonoma Mexico, Dept Fis & Quim Teor, DEPg, Fac Quim, Mexico City 04510, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoInst Tecnol Toluca, ExRancho Virgen 52140, Metepec Edo, MexicoUniv La Habana, Inst Mat & React, Havana 10400, CubaCastro, M, Univ Nacl Autonoma Mexico, Dept Fis & Quim Teor, DEPg, Fac Quim, Del Coyoacan, Mexico City 04510, DF, Mexico TI - Theoretical study of the Hg2+ recognition by 1,3-diphenyl-thiourea AB - We have studied the electronic and structural properties responsible for the molecular recognition that the 1,3-diphenyl-thiourea ionophore (L) experiences by the Hg2+ cation. The theoretical data was obtained for the bare L and for the [L-HgOH](+) and [L-Hg-L](2+) coordination compounds involved in the reaction mechanism in reported sensors. Calculations were performed with the Gaussian-98 program at the B3LYP/6-31G** level. A LANL2DZ pseudopotential was used for Hg. The calculated electrostatic potential of the ionophore has a maximum on the S atom and, with less intensity, on the Z-phenyl group; consistently, high negative charges occur on those sites. The two highest occupied molecular orbitals are also mainly located on the sulfur-Z-phenyl atoms. Thus, this region defines the active site. These results account for the softness of the S atom that is bonded to Hg2+ in the complexes. The metal-sulfur interaction is key in the observed selectivity of Hg2+ by L. However, a significant Z-phenyl-Hg2+ bonding was also found. This rather unexpected result suggests that Z-phenyl is crucial in the recognition of Hg2+. In fact, in [L-H-L](2+), two S atoms and two Z-phenyl groups carry the Hg2+ ion MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000185990100027 L2 - ION-SELECTIVE ELECTRODES; MOLECULAR RECOGNITION; BULK OPTODES; COMPLEXES; CHEMISTRY; DENSITY; REACTIVITY; IONOPHORES; CHLORIDE; SENSORS SO - Journal of Physical Chemistry A 2003 ;107(42):9000-9007 7659 UI - 9343 AU - Castro M AU - Liu SR AU - Zhai HJ AU - Wang LS AD - Univ Nacl Autonoma Mexico, Dept Fis & Pumice Erica, Faulted Pumice, Mexico City 04510, DF, MexicoWashington State Univ, Dept Phys, Richland, WA 99352, USAPacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352, USACastro, M, Univ Nacl Autonoma Mexico, Dept Fis & Pumice Erica, Faulted Pumice, Del Coyoacan Cd Univ, Mexico City 04510, DF, Mexico TI - Structural and electronic properties of small titanium clusters: A density functional theory and anion photoelectron spectroscopy study AB - Density functional theory calculations using the generalized-gradient approximation have been carried out on the structural and electronic properties of Ti-n(-) and Ti-n clusters for n=3-8 and 13. Many low-lying states, of different spins and geometries, were found for each Ti-n(-) and Ti-n species. We observed that the calculated density of states (DOS) and the adiabatic electron binding energies for the ground state of a given anion are in good agreement with experimental photoelectron spectroscopy (PES) data, lending credence to the assignments of the ground state structures. Comparison between the calculated DOS and the PES data for other low-lying states made it possible to affirm contributions of these states to the spectra, allowing the characterization of the ensemble or composition of a given Ti-n(-) system. We found that all the clusters possess highly compact structures, and Ti-7 and Ti-13 have distorted pentagonal bipyramidal and icosahedral structures, respectively. From the ground state spin states, insight into the magnetic properties of the clusters and their evolution with size was also obtained. Small Ti clusters with n<5 are highly magnetic, but the magnetic moment drops rapidly with size. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 19 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000180579900011 L2 - PHOTO-DETACHMENT SPECTROSCOPY; AB-INITIO SIMULATIONS; SMALL FE-N; GEOMETRIC STRUCTURES; IRON CLUSTERS; CO-N; SPECTRA; ENERGIES; TI; N-LESS-THAN-OR-EQUAL-TO-5 SO - Journal of Chemical Physics 2003 ;118(5):2116-2123 7660 UI - 8210 AU - Castro P AU - Pazini E AU - Andrade C AU - Alonso C AD - Univ Autonoma Yucatan, Fac Ingn, Merida 12685, Yucatan, MexicoIPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97310, Yucatan, MexicoUniv Fed Goias, Escola Engn Civil, BR-74605220 Goiania, Go, BrazilInst Ciencias Construcc Eduardo Torroja, Madrid 28033, SpainCastro, P, Univ Autonoma Yucatan, Fac Ingn, Avenida Ind Contaminantes Anillo Periferico Norte, Merida 12685, Yucatan, Mexico TI - Macrocell activity in slightly chloride-contaminated concrete induced by reinforcement primers AB - Patch repair systems are usually composed of a primer (or paint)for the reinforcement, a bond bridge, and a repair mortar to restore the initial geometry. This system is said to induce an enhancement of the corrosion activity of the adjacent nonrepaired zones if they still contain a certain amount of chlorides. In the present paper the action of the steel primers on the galvanic effect toward unrepaired zones was studied. Four protection mechanisms were selected: repassivation, inhibition, barrier and cathodic protection. Small beams were fabricated with an embedded, continuous bar in the top part and a segmented one that enabled the monitoring of the corrosion potential and the corrosion rate of each segment when disconnected, and the macrocell or galvanic activity between segments in repaired interfaces and nonrepaired zones. The results after submitting the beams to different humidity conditions show that the primers were mainly effective in the first month after repair and sometimes they may have enhanced the anodic activity at the interfaces between repaired and nonrepaired zones. At long term, primers based on the barrier mechanism showed better performance than simple concrete or the other primers. The study was possible because corrosion currents were measured in parallel with galvanic current. Each current, separately, cannot give enough information of the developed processes MH - Brazil MH - Mexico|Yucatan MH - Spain PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000183473200008 L2 - chloride;concrete;galvanic current;macrocell;mortar;reinforcement primers;POLARIZATION RESISTANCE SO - Corrosion 2003 ;59(6):535-546 7661 UI - 7196 AU - Castro R AU - Peek-Asa C AU - Garcia L AU - Ruiz A AU - Kraus JF AD - Univ Calif Los Angeles, Sch Publ Hlth, So Calif Injury Prevent Res Ctr, Los Angeles, CA 90024, USANatl Autonomous Univ Mexico, Reg Ctr Multidisciplinary Res, Cuernavaca, Morelos, MexicoUniv Iowa, Iowa Injury Prevent Res Ctr, Iowa City, IA, USACastro, R, Univ Calif Los Angeles, Sch Publ Hlth, So Calif Injury Prevent Res Ctr, 10911 Weyburn Ave,Suite 200, Los Angeles, CA 90024 USA TI - Risks for abuse against pregnant Hispanic women - Morelos, Mexico and Los Angeles County, California AB - Background: Although violence against women is gaining international attention as a prevention priority, little is known about how risks differ across countries. Methods: A comparative study of violence against pregnant Mexican women in Morelos, Mexico, and Latina women in Los Angeles County, California, United States. In 1998 and 1999, women in prenatal clinics were inter-viewed about psychological abuse and sexual and physical violence by their partner, during and the I year prior to the index pregnancy. The overall response rate for Morelos was 99%, with a sample size of 914; Los Angeles County had a response rate of 96.9%, with a sample size of 219. Results: Women in Morelos reported a higher prevalence of violence compared to women in the California (14.8% v 11.9%, respectively). A partner aged <20 years was associated with increased violence in both countries, but the association of violence with other socioeconomic factors differed by country. For example, employed women had higher odds of violence in California but lower odds in Morelos. Women who experienced violence during both the year prior to pregnancy and as a child were more than 25 times more likely to be abused during pregnancy than women not reporting this type of abuse. Conclusion: The identification of factors associated with violence against women, especially as they differ by culture and ethnicity, will help clinicians to better identify victims and to design and implement culturally appropriate prevention programs MH - USA MH - Mexico|Morelos PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health;Medicine, General & Internal U5 - J;Article AV - English IS - 0749-3797 UR - ISI:000186048300010 L2 - VIOLENCE; PREVALENCE; SEVERITY SO - American Journal of Preventive Medicine 2003 ;25(4):325-332 7662 UI - 8077 AU - Castro R AU - Peek-Asa C AU - Ruiz A AD - Natl Autonomous Univ Mexico, Reg Ctr Multidisciplinary Res, Cuernavaca, Morelos, MexicoUniv Iowa, Invury Prevent Res Ctr, Iowa City, IA 52242, USACastro, R, Ctr Reg Invest Multidisciplinarias, Apartado Postal 4-106, Cuernavaca 62431, Morelos, Mexico TI - Violence against women in Mexico: A study of abuse before and during pregnancy AB - Objective. We identified the prevalence and types of violence experienced by pregnant women, the ways victimization changed during pregnancy from the year prior to pregnancy, and factors associated with violence during pregnancy. Methods. We interviewed 914 pregnant women treated in health clinics in Mexico about violence during and prior to pregnancy, violence during childhood and against their own children, and other socioeconomic indicators. Results. Approximately one quarter of the women experienced violence during pregnancy. The severity of emotional violence increased during pregnancy, whereas physical and sexual violence decreased. The strongest predictors of abuse were violence prior to pregnancy, low socioeconomic status, parental violence witnessed by women in childhood, and violence in the abusive partner's childhood. The probability of violence during pregnancy for women experiencing all of these factors was 61%. Conclusions. Violence is common among pregnant women, but pregnancy does not appear to be an initiating factor. Intergenerational violence is highly predictive of violence during pregnancy MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER PUBLIC HEALTH ASSOC INC RP - NOT IN FILE U3 - TC 24 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0090-0036 UR - ISI:000183827200034 L2 - INTIMATE PARTNER ABUSE; DOMESTIC VIOLENCE; BIRTH-WEIGHT; PREVALENCE; SEVERITY SO - American Journal of Public Health 2003 ;93(7):1110-1116 7663 UI - 7816 AU - Catalan CAN AU - Cuenca MD AU - Hernandez LR AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Mar, Inst Ecol, Puerto Angel 70902, Oaxaca, MexicoUniv Nacl Tucuman, Fac Bioquim Quim & Farm, Inst Quim Organ, RA-4000 San Miguel De Tucuman, ArgentinaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - cis,cis-Germacranolides and melampolides from Mikania thapsoides AB - The aerial parts of Mikania thapsoides afforded six new cis,cis-germacranolide-type sesquiterpene lactones (1-6), of which three (1-3) have an unusual 3,4-epoxy function, and also afforded two new melampolides (7 and 8). All compounds have a trans C-8 lactone ring closure. Their structures were elucidated using 1D and 2D NMR measurements, and the absolute configuration of 1 was determined using the Mosher ester method MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Oaxaca PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000184412800009 L2 - GERMACRANOLIDES SO - Journal of Natural Products 2003 ;66(7):949-953 7664 UI - 7903 AU - Cecenas-Falcon M AU - Edwards RM AD - Inst Invest Elect, Cuernavaca 62490, Morelos, MexicoPenn State Univ, University Pk, PA 16802, USACecenas-Falcon, M, Inst Invest Elect, Edificio 27 2 Piso,Calle Reforma 113, Cuernavaca 62490, Morelos, Mexico TI - Out-of-phase boiling water reactor stability monitoring AB - The study of the first harmonic mode of the neutron spectrum in a boiling water reactor (BWR) yields the capability to assess the decay ratio for the harmonic mode and anticipate the impact on the fundamental mode when an out-of-phase oscillation is about to take place. In this work, the neutron spectrum for a BWR is approximated as a linear combination of the fundamental and first harmonic modes, and these two modes are studied applying reduced order modal models. A stability estimator is constructed to monitor the development of the harmonic mode instability through the calculation of the decay ratio. To achieve an estimation of the decay ratio for each mode, the estimator requires the separation of both modes from the neutron spectrum, and a method to obtain these modes based on a bare homogeneous reactor is presented. The Reduced Order Modal Estimator is tested with computer-generated data and with data from the Ringhals Stability Benchmark MH - Mexico|Morelos MH - USA PB - LA GRANGE PK: AMER NUCLEAR SOCIETY RP - NOT IN FILE U3 - TC 3 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0029-5450 UR - ISI:000184252700003 L2 - modal kinetics;reduced model;BWR stability;REDUCED-ORDER MODEL SO - Nuclear Technology 2003 ;143(2):125-131 7665 UI - 6823 AU - Cedillo-Barron L AU - Foster-Cuevas M AU - Cook A AU - Gutierrez-Castaneda B AU - Kollnberger S AU - Lefevre F AU - Parkhouse RME AD - Inst Anim Hlth, Pirbright Lab, Pirbright GU24 0NF, Surrey, EnglandINRA, Virol & Immunol Mol, F-78350 Jouy En Josas, FranceGulbenkian Inst Sci, P-2780156 Oeiras, PortugalUniv Oxford, Sir William Dunn Sch Pathol, Oxford OX1 3RE, EnglandIPN, ESM, Secc Grad & Invest, Mexico City 11360, DF, MexicoInst Mol Med, Dept Human Immunol, Oxford OX3 9DS, EnglandCedillo-Barron, L, Ctr Invest & Estudios Avanzados IPN, Convestav IPN, Dept Biomed Mol, Av IPN 2508 Col, San Pedro Zacatenco 07360, Mexico TI - Immunogenicity of plasmids encoding T and B cell epitopes of foot-and-mouth disease virus (FMDV) in swine AB - In this work, we have investigated the immune response in pigs to two recombinant plasmids containing immunodominant neutralizing antibody epitopes of foot-and-mouth disease virus structural protein (VP1) coexpressed with viral non-structural proteins as a source of T cell epitopes. The plasmid pcDNA3.1/3D 15 contained a sequence coding for the 3D polymerase upstream of a sequence coding for peptide FMDV15, a peptide derived from VP1, previously shown to stimulate protective immunity to foot-and-mouth disease virus (FMDV), that consisted of the carboxy terminal peptide [VP1(200-213)] linked by ProProSer to the "loop" peptide [VP1(143-160)] and terminating in CysGly. The plasmid, pcDNA3.1/2B15 contained a sequence coding for the non-structural protein 2B, and the same FMDV15 peptide sequence. Pigs injected with both constructs showed antibody and T cell responses to 3D and 213, but not to the FMDV15 peptide. Additionally, delayed type hypersensitivity responses were observed in some cases to both 3D or 2D and to FMDV virus. Finally, no protection was seen against FMDV infection in animals immunized with either of the two FMDV DNA constructs. The additional co-immunization of plasmids encoding for GMCSF did not result in any significant change in the immune responses to the plasmids encoding for FMDV. This work gives some optimism for the construction of a DNA vaccine for FMDV in the future. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Portugal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Immunology;Medicine, Research & Experimental;Veterinary Sciences U5 - J;Article AV - English IS - 0264-410X UR - ISI:000186830800024 L2 - DNA immunization;foot-and-mouth disease;vaccines;IMMUNE-RESPONSES; MEDIATED-IMMUNITY; CAPSID PROTEINS; DNA VACCINATION; FUSION PROTEIN; VACCINES; PEPTIDE; INFECTION; RECOGNITION; POLYMERASE SO - Vaccine 2003 ;21(27-30):4261-4269 7666 UI - 8023 AU - Cedillo-Rivera R AU - Darby JM AU - Enciso-Moreno JA AU - Ortega-Pierres G AU - Ey PL AD - Univ Adelaide, Dept Mol Biosci, Adelaide, SA 5005, AustraliaIMSS, UADY, Unidad Interinst Invest Med, Merida, Yucatan, MexicoIMSS, Ctr Med Nacl Siglo 21, Unidad Invest Enfermedades Infecciosas & Parasita, Mexico City, DF, MexicoIPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07738, DF, MexicoEy, PL, Univ Adelaide, Dept Mol Biosci, North Terrace, Adelaide, SA 5005, Australia TI - Genetic homogeneity of axenic isolates of Giardia intestinalis derived from acute and chronically infected individuals in Mexico AB - Twenty-six axenic isolates of Giardia intestinalis, established in Mexico City over an 11-year period from symptomatic and asymptomatic individuals with acute or chronic infections, were typed genetically. A segment of the glutamate dehydrogenase gene was amplified by PCR and examined by restriction analysis using BspH1 and ApaI to determine the major genetic assemblages to which the isolates belonged. This was coupled with the amplification and analysis of segments of variant-specific surface protein genes to determine genetic subgroupings. Despite their heterogeneous clinical backgrounds, the isolates were found to be genetically homogeneous-all belonging to genetic group I of assemblage A. The results show that type A-I G. intestinalis is ubiquitous in Mexico City and that host factors play an important, if not dominant, role in determining the clinical outcome of Giardia infections in humans MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000183889700005 L2 - POLYMERASE-CHAIN-REACTION; ISOENZYME ANALYSIS; LAMBLIA; ANIMALS; HUMANS; DUODENALIS; GENOTYPES; SEQUENCE; GROWTH; DNA SO - Parasitology Research 2003 ;90(2):119-123 7667 UI - 6546 AU - Celikovsky S AU - Ruiz-Leon JJ AU - Sapiens AJ AU - Torres-Munoz JA AD - Acad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague 8, Czech RepublicIPN, Ctr Invest & Estudios Avanzados, Guadalajara 44550, Jalisco, MexicoIPN, Dept Automat Control, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoCelikovsky, S, Acad Sci Czech Republ, Inst Informat Theory & Automat, Pod Vodarenskov Vezi 4, CR-18208 Prague 8, Czech Republic TI - Output feedback problems for a class of nonlinear systems AB - The paper deals with the construction of the output feedback controllers for the systems that are transformable into a simpler form via coordinate change and static state feedback and, at the same time, via (possibly different) coordinate change and output injection. Illustrative examples axe provided to stress the major obstacles in applying the above scheme, especially as far as its global aspects are concerned. The corresponding results are then applied to the problem of the real-time control of the water-storing plant. Using the methods developed in the theoretical part of the paper, the control of the water levels is designed to handle the unknown influx of the water into the first tank using measurements of water levels only. Simulations results are presented showing good performance of the designed controller. Some preliminary laboratory experiments have shown promising results of the real time implementation as well MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000187639600001 L2 - output feedback;nonlinear systems;output regulations;SEPARATION PRINCIPLE; GLOBAL STABILIZATION; LINEARIZATION; OBSERVERS SO - Kybernetika 2003 ;39(4):389-414 7668 UI - 6910 AU - Cendrero A AU - Frances E AU - Del Corral D AU - Ferman JL AU - Fischer D AU - Del Rio L AU - Camino M AU - Lopez A AD - Univ Cantabria, Fac Ciencias, E-39005 Santander, SpainUniv Autonoma Baja California, Fac Ciencias Marinas, La Paz, Baja California, MexicoUniv Nacl Mar Del Plata, Ctr Geol Costas & Cuaternario, Mar Del Plata, Buenos Aires, ArgentinaCendrero, A, Univ Cantabria, Fac Ciencias, E-39005 Santander, Spain TI - Indicators and indices of environmental quality for sustainability assessment in coastal areas; Application to case studies in Europe and the Americas AB - This contribution presents a procedure for sustainability assessment in coastal areas, based on a series of indicators and indices that reflect environmental quality. Three dimensions of environmental quality are taken into account: 'functions', 'interactions' and 'components'. Functions are considered from the 'ecocentric' (naturalness) and 'anthropocentric' (source of resources, sink for wastes, support of activities and provider of services) points of view. Humans-environment interactions are represented by means of pressure, state and response indicators. Environmental components include air, water, biota, soil, geomorphologic characteristics and processes, etc. Numerical indices are used to assess specific dimensions as well as integrated environmental quality. Increases or decreases in index values are assumed to indicate trends towards greater or lesser sustainability of existing practices. The procedure proposed has been developed within the ELANEM Euro-Latin American project (INCO Programme, European Commission). The methodological framework, indicators and criteria used for the assessment are explained. Results obtained on several study areas of Spain, Mexico and Argentina are presented and discussed MH - Argentina MH - Mexico|Baja California MH - Spain PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000186579700018 L2 - environmental quality;environmental indicators;environmental assessment;environmental monitoring;coastal areas;MANAGEMENT SO - Journal of Coastal Research 2003 ;19(4):919-933 7669 UI - 8395 AU - Cerna JF AU - Nataro JP AU - Estrada-Garcia T AD - Inst Politecn Nacl, CINVESTAV, Dept Mol Biomed, Mexico City 07360, DF, MexicoUniv Maryland, Sch Med, Dept Pediat & Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAEstrada-Garcia, T, Inst Politecn Nacl, CINVESTAV, Dept Mol Biomed, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico TI - Multiplex PCR for detection of three plasmid-borne genes of enteroaggregative Escherichia coli strains AB - We developed a novel multiplex PCR assay for enteroaggregative Escherichia coli (EAEC) detection, by using three plasmid-borne genes (the aggregative adherence [AA] probe, aap, and aggR). One or more of the loci were detected in 24 (86%) of 28 patient isolates analyzed. The multiplex PCR assay is a fast, convenient, and sensitive molecular test to detect EAEC MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 20 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000182934500052 L2 - FIMBRIA-I EXPRESSION; HEP-2 CELLS; PERSISTENT DIARRHEA; ADHERENCE; VOLUNTEERS; PATTERNS SO - Journal of Clinical Microbiology 2003 ;41(5):2138-2140 7670 UI - 8439 AU - Cervantes-Coste G AU - Fuentes-Paez G AU - Yeshurun I AU - Jimenez-Sierra JM AD - Univ Nacl Autonoma Mexico, Hosp Dr Luis Sanchez Bulnes, IAP, Asoc Para Evitar Ceguera Mexico, Mexico City 04030, DF, MexicoTel Aviv Univ, Sackler Fac Med, Edith Wolfson Med Ctr, IL-69978 Tel Aviv, IsraelCervantes-Coste, G, Univ Nacl Autonoma Mexico, Hosp Dr Luis Sanchez Bulnes, IAP, Asoc Para Evitar Ceguera Mexico, Vincente Garcia Torres 46,Col San Lucas, Mexico City 04030, DF, Mexico TI - Tapetal-like sheen associated with fleck retinopathy in Alport syndrome MH - Israel MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Ophthalmology U5 - J;Article AV - English IS - 0275-004X UR - ISI:000182898700020 L2 - REFLEX SO - Retina-the Journal of Retinal and Vitreous Diseases 2003 ;23(2):245-247 7671 UI - 6820 AU - Cervantes FJ AU - Duong-Dac T AU - Roest K AU - Akkermans ADL AU - Lettinga G AU - Field JA AD - Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85000, Sonora, MexicoWageningen Univ, Sub Dept Environm Technol, NL-6700 EV Wageningen, NetherlandsWageningen Univ, Microbiol Lab, NL-6700 EV Wageningen, NetherlandsUniv Arizona, Dept Chem & Environm Engn, Tucson, AZ 85721, USACervantes, FJ, Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, 5 Febrero 818 Sur, Obregon 85000, Sonora, Mexico TI - Enrichment and immobilization of quinone-respiring bacteria in anaerobic granular sludge AB - The capacity of an anaerobic granular sludge for serving as an immobilizing mechanism for quinone-respiring bacteria was evaluated. The inoculum was continuously fed with a basal medium containing the humic model compound, anthraquinone-2,6-disulfonate (AQDS), as a terminal electron acceptor. Complete reduction of AQDS was achieved by the granular sludge for a prolonged period in an anaerobic bioreactor provided with a mixture of volatile fatty acids as a substrate. Phylogenetic analysis revealed the enrichment and immobilization of AQDS-respiring bacteria appearing as dominant organisms in the microbial population of the AQDS-supplemented reactor, compared to a reactor control operated under methanogenic conditions. The consistent quinone-reducing capacity observed in the consortium indicates that it is feasible to apply quinone-reducing microorganisms in continuous bioreactors and this ability can potentially be important in wastewaters rich in humic substances. The quinone reducing activity could also be applied to accelerate the conversion of xenobiotics susceptible to reductive biotransformations such as azo dyes and polychlorinated compounds in continuous bioreactors MH - Mexico|Sonora MH - Netherlands MH - USA PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000186741700003 L2 - AQDS;immobilization;quinones;UASB;xenobiotics;ELECTRON-ACCEPTORS; HUMIC SUBSTANCES; CARBON-TETRACHLORIDE; MICROBIAL OXIDATION; REDOX MEDIATORS; DYE REDUCTION; AZO DYES; MICROORGANISMS; RESPIRATION; RECOVERY SO - Water Science and Technology 2003 ;48(6):9-16 7672 UI - 9511 AU - Cervantes FJ AU - Duong-Dac T AU - Ivanova AE AU - Roest K AU - Akkermans ADL AU - Lettinga G AU - Field JA AD - Univ Wageningen & Res Ctr, Subdept Environm Technol, NL-6700 EV Wageningen, NetherlandsUniv Wageningen & Res Ctr, Microbiol Lab, NL-6700 EV Wageningen, NetherlandsInst TEcnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85000, Sonora, MexicoUniv Arizona, Dept Environm Chem & Engn, Tucson, AZ 85721, USACervantes, FJ, Univ Wageningen & Res Ctr, Subdept Environm Technol, POB 8129, NL-6700 EV Wageningen, Netherlands TI - Selective enrichment of Geobacter sulfurreducens from anaerobic granular sludge with quinones as terminal electron acceptors AB - A quinone-respiring, enrichment culture derived from methanogenic granular sludge was phylogenetically characterized by using a combined cloning-denaturing gradient gel electrophoresis (DGGE) method, which revealed that the consortium developed was dominated by a single microorganism: 97% related, in a sequence of 1520 base pairs, to Geobacter sulfurreducens. The enrichment culture could grow with acetate, formate or H-2 when humic acids, the humic model compound, anthraquinone-2,6-disulfonate (AQDS), or chelated Fe(III) was provided as a terminal electron acceptor. The occurrence of a humic acid- or quinone-respiring microorganism in the microbial community of a wastewater treatment system suggests that this type of microorganisms may play a potential role in anaerobic bioreactors treating humus-containing wastewaters MH - Mexico|Sonora MH - Netherlands MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000180046100008 L2 - anthraquinone-2,6-disulfonate;Geobacter sulfurreducens;granular sludge;humus reduction;wastewater;HUMIC SUBSTANCES; REDOX MEDIATORS; REDUCTION; RESPIRATION; BACTERIA; RECOVERY SO - Biotechnology Letters 2003 ;25(1):39-45 7673 UI - 8818 AU - cevedo-Whitehouse K AU - de la Cueva H AU - Gulland FMD AU - urioles-Gamboa D AU - rellano-Carbajal F AU - Suarez-Guemes F AD - Ctr Invest Cient & Educ Super Ensenada, Div Oceanol, Dept Ecol, Ensenada, Baja California, MexicoMarin Headlands, Marine Mammal Ctr, Sausalito, CA 94965, USACtr Interdisciplinario Ciencias Marinas, Lab Mamiferos Marinos, La Paz, Baja California, MexicoUniv Autonoma Baja Calif, Inst Invest Oceanol, Mol Biol Lab, Ensenada, Baja California, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Microbiol & Immunol, Mexico City 04510, DF, MexicoAcevedo-Whitehouse, K, Univ Cambridge, Dept Zool, Mol Ecol Lab, Downing St, Cambridge CB2 3EJ, England TI - Evidence of Leptospira interrogans infection in California sea lion pups from the Gulf of California AB - Forty-two urine and 96 blood and serum samples were obtained from California sea lion (Zalophus californianus) pups from the Gulf of California during the 2000 reproductive season. Antibody prevalence to 13 serovars of Leptospira interrogans was determined by microagglutination tests (MAT); presence of pathogenic leptospires was detected by polymerase chain reaction (PCR). Samples with antibody titers greater than or equal to1:25 or 115 bp fragments on ethidium bromide-stained 1.5% agarose gels were considered positive. Antibody prevalence was 54% overall with highest prevalence against serovar cynopteri (50% of all positive reactions). Highest antibody titers (1:50) were detected against serovars cynopteii and pomona. Polymerase chain reaction products were observed in two of 42 urine samples, six of 96 blood samples, and one of 96 serum samples. Presence of PCR products in blood and serum was demonstrated in pups that were seronegative. Kruskall-Wallis tests and corresponding post hoc Tukey tests (alpha=0.05) showed that prevalence of leptospirosis was significantly different among all rookeries. The high seroprevalence (54%), low antibody titers (maximum 1:50), absence of pups showing clinical signs indicative of the disease, and lack of recent reports of increased mortality of sea lions in the Gulf of California are suggestive of the presence of enzootic host-adapted serovars. Crowding in rookeries as well as the presence of bats and rodents on some of the islands may explain infection by L. interrogans (sensu lato) and some of the differences in seroprevalence among reproductive rookeries MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: WILDLIFE DISEASE ASSN, INC RP - NOT IN FILE U3 - TC 5 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0090-3558 UR - ISI:000181880500016 L2 - leptospirosis;microagglutination test;polymerase chain reaction;sea lion;serologic survey;Zalophus californianus;POLYMERASE-CHAIN-REACTION; URINE SO - Journal of Wildlife Diseases 2003 ;39(1):145-151 7674 UI - 8954 AU - ceves-Medina G AU - Jimenez-Rosenberg SPA AU - Hinojosa-Medina A AU - Funes-Rodriguez R AU - Saldierna RJ AU - Lluch-Belda D AU - Smith PE AU - Watson W AD - INP, Ctr Interdisciplinario Ciencias Marinas, Dept Plancton & Ecol Marina, La Paz 23000, Baja California, MexicoNOAA, NMFS, SW Fisheries Sci Ctr, La Jolla, CA 92038, USAAceves-Medina, G, INP, Ctr Interdisciplinario Ciencias Marinas, Dept Plancton & Ecol Marina, Apdo Postal 593, La Paz 23000, Baja California, Mexico TI - Fish larvae from the Gulf of California AB - Taxonomic composition of fish larvae was analysed from 464 plankton samples obtained during 10 oceanographic surveys in the Gulf of California between 1984 and 1988. We identified 283 taxa: 173 species, 57 genera, and 53 families. Tropical and subtropical species predominated except during the winter, when temperate-subarctic species were dominant. The most abundant species were the mesopelagic Benthosema panamense, Triphoturus mexicanus and Vinciguerria lucetia, but the coastal pelagic species Engraulis mordax, Opisthonema spp., Sardinops caeruleus and Scomber japonicus were also prominent. The taxonomic composition of the ichthyoplankton shows the seasonality of the Gulf as well as environmental changes that occurred between the 1984-1987 warm period and the 1956-1957 cool period previously reported. The presence of E. mordax larvae as one of the most abundant species in the Gulf provides evidence of the reproduction of this species two years before the development of the northern anchovy fishery and the decline of the sardine fishery in the Gulf of California MH - Mexico|Baja California MH - USA PB - BARCELONA: INST CIENCIAS MAR BARCELONA RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0214-8358 UR - ISI:000181514900001 L2 - fish larvae;ichthyoplankton;Gulf of California;OF-CALIFORNIA; VARIABILITY; HISTORY; REGION SO - Scientia Marina 2003 ;67(1):1-11 7675 UI - 7319 AU - Chacon MR AU - Figueras MJ AU - Castro-Escarpulli G AU - Soler L AU - Guarro J AD - Univ Rovira & Virgili, Fac Med & Ciencias Salud, Dept Ciencias Med Basicas, E-43201 Reus, SpainEscuela Nacl Ciencias Biol, Dept Bacteriol Med, Mexico City, DF, MexicoFigueras, MJ, Univ Rovira & Virgili, Fac Med & Ciencias Salud, Dept Ciencias Med Basicas, San Lorenzo 21, E-43201 Reus, Spain TI - Distribution of virulence genes in clinical and environmental isolates of Aeromonas spp AB - The distribution and phenotypic activity of the genes encoding for serine protease, glycerophospholipid-cholesterol acyltransferase, lipases, aerolysin/hemolysin and DNases were investigated in 234 isolates identified by 16S rDNA-RFLP representing all the species of Aeromonas. The former three genes were found to be highly conserved among the genus. Aerolysin/hemolysin and DNase genes and beta-hemolytic activity were significantly more frequent in clinical than in environmental isolates. Aerolysin/hemolysin and serine protease genes were present in all beta-hemolytic strains supporting serine protease as possibly important for the activation of the former gene. The high prevalence of virulence factors in clinical isolates indicates that they may play a role in the mechanisms of pathogenesis of these microorganisms MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0003-6072 UR - ISI:000185682500004 L2 - aerolysin;Aeromonas;DNase;GCAT;lipases;PCR;serine protease;virulence factors;SALMONICIDA SSP SALMONICIDA; POLYMERASE-CHAIN-REACTION; HEMOLYTIC TOXIN GENES; SERINE-PROTEASE GENE; SUCKLING MOUSE MODEL; NUCLEOTIDE-SEQUENCE; AEROLYSIN GENE; CHOLESTEROL ACYLTRANSFERASE; EXTRACELLULAR LIPASE; MOLECULAR-CLONING SO - Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 2003 ;84(4):269-278 7676 UI - 7166 AU - Chacon O AU - Viana MT AU - Farias A AU - Vazquez C AU - Garcia-Esquivel Z AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUniv Austral Chile, Inst Acuicultura, Puerto Montt, ChileNatl Autonomous Univ Mexico, Fac Ciencias Vet, Mexico City, DF, MexicoGarcia-Esquivel, Z, Univ Autonoma Baja California, Inst Invest Oceanol, Apdo Postal 453, Ensenada 22800, Baja California, Mexico TI - Circadian metabolic rate and short-term response of juvenile green abalone (Haliotis fulgens Philippi) to three anesthetics AB - Time-course experiments were performed on juvenile green abalone (Haliotis fulgens) to assess the degree of stress caused by the anesthetics magnesium sulfate (MS), benzocaine (BZ), and phenoxyethanol (PE). Metabolic rate (VO2) of abalone was reduced by 65, 35, and 18% during short-term (10 or 20 min) exposure to MS, BZ, and PE, respectively. Abalones significantly increased their VO2 above control values (1.5-fold) after removal of PE from metabolic chambers, whereas those treated with MS or BZ recovered their VO2 to preanesthesia values. Visual criteria of recovery generally coincided with those of metabolic measurements (i.e., 80% of abalone regained "normal" activity after 35 min postanesthesia), yet metabolic measurements showed that "fast" recovering abalone treated with PE maintained high VO2 values during 3-h postanesthesia. Abalone treated and nontreated with anesthetics exhibited a circadian metabolic rhythm, with 20-35% higher rates observed during dark than light hours. Despite the short-term metabolic alterations with MS, BZ, and PE, the present study suggests that all three anesthetics may be safely used in abalone. However, detailed evaluations are still needed to assess the effect of anesthesia on other physiological variables. The results obtained in this study highlight the importance of physiological evaluations when different chemical substances are used in aquatic invertebrates MH - Chile MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000186096200008 L2 - abalone;anesthetics;circadian rhythm;metabolism;Haliotis fulgens;OXYGEN-CONSUMPTION; LAEVIGATA DONOVAN; GROWTH-RATE; RESPIRATION; MIDAE; KAMTSCHATKANA; ENERGETICS; MAGNESIUM; VISCERA SO - Journal of Shellfish Research 2003 ;22(2):415-421 7677 UI - 9080 AU - Chaimanee Y AU - Jolly D AU - Benammi M AU - Tafforeau P AU - Duzer D AU - Moussa I AU - Jaeger JJ AD - Univ Montpellier 2, ISEM, F-34095 Montpellier, FranceDept Mineral Resources, Geol Survey Div, Paleontol Sect, Bangkok 10400, ThailandUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoJaeger, JJ, Univ Montpellier 2, ISEM, CC 064,Pl Eugene Bataillon, F-34095 Montpellier, France TI - A Middle Miocene hominoid from Thailand and orangutan origins AB - The origin of orangutans has long been debated. Sivapithecus is considered to be the closest ancestor of orangutans because of its facial-palatal similarities(1), but its dental characteristics 2 and postcranial skeleton(2,3) do not confirm this phylogenetic position. Here we report a new Middle Miocene hominoid, cf. Lufengpithecus chiangmuanensis n. sp. from northern Thailand. Its dental morphology relates it to the Pongo clade, which includes Lufengpithecus(4,5), Sivapithecus(2), Gigantopithecus(6), Ankarapithecus(7) and possibly Griphopithecus(8). Our new species displays striking dental resemblances with living orangutans and appears as a more likely candidate to represent an ancestor of this ape. In addition, it originates from the geographic area of Pleistocene orangutans. But surprisingly, the associated flora shows strong African affinities, demonstrating the existence of a temporary floral and faunal dispersal corridor between southeast Asia and Africa during the Middle Miocene, which may have played a critical role in hominoid dispersion MH - France MH - Mexico|Distrito Federal MH - Thailand PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 30 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000181343100036 L2 - PAKISTAN; CHINA; SIVAPITHECUS; NEOGENE SO - Nature 2003 ;422(6927):61-65 7678 UI - 9187 AU - Chamoun N AU - Landau SJ AU - Vucetich H AD - Higher Inst Appl Sci & Technol, Dept Phys, Damascus, SyriaNatl Univ La Plata, Fac Ciencias Astron & Geofis, RA-1900 La Plata, ArgentinaUniv Buenos Aires, Dept Fis, Buenos Aires, DF, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Dept Fis, Mexico City 04510, DF, MexicoChamoun, N, Higher Inst Appl Sci & Technol, Dept Phys, POB 31983, Damascus, Syria TI - Constraining theoretical models with astronomical and geophysical bounds AB - We consider astronomical and geophysical bounds in order to test Kaluza-Klein like models and some particular models of Bekenstein's theory. Bounds on the free parameteres of the theories are obtained MH - Argentina MH - Mexico|Distrito Federal MH - Syria PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000181086600021 L2 - FINE-STRUCTURE CONSTANT; QSO ABSORPTION-LINES; KALUZA-KLEIN THEORIES; TIME-VARIATION; FUNDAMENTAL CONSTANTS; PHYSICAL CONSTANTS; EVOLUTION; LIMITS SO - Astrophysics and Space Science 2003 ;283(4):595-600 7679 UI - 8330 AU - Chan-Bacab MJ AU - Balanza E AU - Deharo E AU - Munoz V AU - Garcia RD AU - Pena-Rodriguez LM AD - Ctr Invest Cient Yucatan, Unidad Biotecnol, Grp Quim Organ, Merida 97200, Yucatan, VenezuelaUniv Autonoma Campeche, Lab Microbiol Ambientale & Biotecnol, Campeche 24030, MexicoInst Boliviano Biol Altura, Unidad Farmacognosia, La Paz, BoliviaCtr Invest Cient Yucatan, Unidad Biotecnol, Unidad Recursos Nat, Merida 97200, Yucatan, MexicoPena-Rodriguez, LM, Ctr Invest Cient Yucatan, Unidad Biotecnol, Grp Quim Organ, Calle 43 130,Col Chuburna, Merida 97200, Yucatan, Venezuela TI - Variation of leishmanicidal activity in four populations of Urechites andrieuxii AB - Urechites andrieuxii Muell.-Arg. (Apocynaceae) is widely used in the Yucatan Peninsula for the treatment of cutaneous leishmaniasis. The influence of the environment in the variability of the leishmanicidal activity of the plant was evaluated using crude methanol extracts of roots from individuals belonging to four natural populations growing in the Yucatan Peninsula. The results of the growth inhibition test using three Leishmania spp. promastigotes showed a stronger leishmanicidal activity in populations of U. andrieuxii growing in more humid environments. Further evaluation against four human cancer cell lines and in the brine shrimp bioassay of both extracts from various parts of the plant and from the most active methanol root extracts, suggested that while the leaf extract appears to have selective toxicity against Leishmania parasites. the strong leishmanicidal activity detected in the root extracts of the plant might be due to its cytotoxicity. (C) 2003 Published by Elsevier Science Ireland Ltd MH - Bolivia MH - Mexico|Campeche MH - Mexico|Yucatan MH - Venezuela PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000183094500019 L2 - leishmanicidal activity;Urechites andrieuxii;Apocynaceae;Leishmania spp.;cytotoxicity;Artemia salina;BRINE SHRIMP; ENVIRONMENTAL-FACTORS; MEDICINAL-PLANTS; CYTOTOXICITY; CHEMOTHERAPY; INVITRO; ASSAY SO - Journal of Ethnopharmacology 2003 ;86(2-3):243-247 7680 UI - 7920 AU - Chan CW AU - Liu XJ AU - Yeung WK AD - Univ Nacl Autonoma Mexico, Ctr Instrmentos, Mexico City 04510, DF, MexicoUniv Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R ChinaLiu, XJ, Univ Nacl Autonoma Mexico, Ctr Instrmentos, Mexico City 04510, DF, Mexico TI - Neurofuzzy network based self-tuning control with offset eliminating AB - The design of nonlinear controllers involves first selecting the input and then determining the nonlinear functions for the controllers. Since systems described by smooth nonlinear functions can be approximated by linear models in the neighbourhood of the selected operating points, the input of the nonlinear controller at these operating points can be chosen to be identical to those of the local linear controllers. Following this approach, it is proposed that the input of the nonlinear controller are similarly chosen, and that the local linear controllers are designed based on the integrating and k-incremental suboptimal control laws for their ability to remove offsets. Neurofuzzy networks are used to implement the nonlinear controllers for their ability to approximate nonlinear functions with arbitrary accuracy, and to be trained from experimental data. These nonlinear controllers are referred to as neurofuzzy controllers for convenience. As the integrating and k-incremental control laws have also been applied to implement self-tuning controllers, the proposed neurofuzzy controllers can also be interpreted as self-tuning nonlinear controllers. The training target for the neurofuzzy controllers is derived, and online training of the neurofuzzy controllers using a simplified recursive least squares (SRLS) method is presented. It is shown that using the SRLS method, computing time to train the neurofuzzy controllers can be drastically reduced and the ability to track varying dynamics improved. The performance of the neurofuzzy controllers and their ability to remove offsets are demonstrated by two simulation examples involving a linear and a nonlinear system, and a case study involving the control of the drum water level in the boiler of a power generation system MH - Mexico|Distrito Federal MH - Peoples R China PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Computer Science, Theory & Methods;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7721 UR - ISI:000184140400003 L2 - NEURAL NETWORKS; SYSTEMS; MODEL SO - International Journal of Systems Science 2003 ;34(2):111-122 7681 UI - 7600 AU - Chanon KE AU - Mendez-Galvan JF AU - Galindo-Jaramillo JM AU - Olguin-Bernal H AU - Borja-Aburto VH AD - US EPA, Off Pesticide Programs, Washington, DC 20460, USASecretaria Salud Mexico, Mexico City, DF, MexicoInst Mexicano Seguro Social, Mexico City, DF, MexicoChanon, KE, US EPA, Off Pesticide Programs, 1200 Pennsylvania Ave NW, Washington, DC 20460 USA TI - Cooperative actions to achieve malaria control without the use of DDT AB - The success of regional networks to provide incentives and mechanisms for sharing information is illustrated through the North American Regional Action Plan on DDT (NARAP). This NARAP was designed to reduce human and environmental exposure to DDT and its metabolites in North America through cooperative efforts. The increasing role of environmental concerns in the planning and design of Mexico's DDT phase-out program motivated the Mexican Ministry of Health to undertake an alternative program for malaria control maximizing community participation without negatively affecting human and ecosystem health. This program relies on: 1) elimination of parasites in people, 2) improvement of personal and household hygiene, and 3) use of environmental management practices to eliminate mosquito breeding sites. This new strategy resulted in the elimination of DDT for malaria control in Mexico in the year 2000. While malaria and its corresponding vectors show considerable variability within a single country and certainly around the globe, the case example of Mexico provides a methodology for developing alternatives to DDT MH - USA MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 1438-4639 UR - ISI:000185024300015 L2 - DDT;North American Regional Action Plan;malaria control;MEXICO; VERACRUZ; SERUM SO - International Journal of Hygiene and Environmental Health 2003 ;206(4-5):387-394 7682 UI - 7658 AU - Chanona PJJ AU - Alamilla BL AU - Farrera RRR AU - Quevedo R AU - Aguilera JM AU - Gutierrez LGF AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Grad & Invest Alimentos, Mexico City 11340, DF, MexicoPontificia Univ Catolica Chile, Dept Chem Engn & Bioproc, Santiago 22, ChileGutierrez, LGF, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Grad & Invest Alimentos, Plan de Ayala & Carpio S-N, Mexico City 11340, DF, Mexico TI - Description of the convective air-drying of a food model by means of the fractal theory AB - A slab-shaped model food prepared using glucose solutions and agar as jellifying agent was subjected to drying in an experimental drier. Drying kinetics and surface temperature (ST) distribution along drying were evaluated. When fractal analysis was applied to ST distributions it was possible to observe three stages: the first one, at the beginning of the process, was very short and could not be associated with a fractal dimension. The second one, by far the longest, had a constant value of the fractal dimension of the ST distribution and towards the end of the process, as temperature of the surface of the material tended to homogenise, a final linear stage was found which corresponded to equilibrium conditions. Images of the slab along drying were recorded and showed an increasing heterogeneous appearance as drying proceeds. Grey level intensity plots corresponding to these images also showed an increasing irregularity (higher values of fractal dimension) with drying time. Fractal analysis probed to be a useful tool for describing drying kinetics and for characterising images of samples subjected to dehydration MH - Chile MH - Mexico|Distrito Federal PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1082-0132 UR - ISI:000184881300012 L2 - drying kinetics;fractal analysis;surface temperatures;LINEAR TRANSPORT-EQUATIONS; STRANGE ATTRACTORS; CHAOS; DIFFUSION; SURFACES; MEDIA SO - Food Science and Technology International 2003 ;9(3):207-213 7683 UI - 6218 AU - Charlier JC AU - Terrones M AU - Banhart F AU - Grobert N AU - Terrones H AU - Ajayan PM AD - Univ Catholique Louvain, B-1348 Louvain, BelgiumInst Potosino Invest Cientif & Technol, San Luis Potosi 78216, MexicoUniv Ulm, Zent Einrichtung Elekt Mikroskopie, D-89069 Ulm, GermanyMax Planck Inst Met Res, D-70569 Stuttgart, GermanyRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USACharlier, JC, Univ Catholique Louvain, B-1348 Louvain, Belgium TI - Experimental observation and quantum modeling of electron irradiation on single-wall carbon nanotubes AB - In situ experiments, based on electron irradiation at high temperature in a transmission electron microscope, are used to investigate isolated, packed and crossing single-wall nanotubes. During continuous, uniform atom removal, surfaces of isolated single-wall nanotubes heavily reconstruct leading to drastic dimensional changes. In bundles, coalescence of single-wall nanotubes is observed and induced, by vacancies via a zipper-like mechanism. "X", "Y", and "T" carbon nano structures are also fabricated by covalently connecting crossed single-wall nanotubes in order to pave the way toward controlled fabrication of nanotube based molecular junctions and network architectures exhibiting exciting electronic and mechanical behavior. Each experiment is followed by quantum modeling in order to investigate the effect of the irradiation process at the atomic level MH - Belgium MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 1536-125X UR - ISI:000189021300027 L2 - MOLECULAR-DYNAMICS SO - Ieee Transactions on Nanotechnology 2003 ;2(4):349-354 7684 UI - 7639 AU - Chaturvedi S AU - Gupta V AD - Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, IndiaCINVESTAV, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoChaturvedi, S, Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, India TI - Predictions for the unitarity triangle angles in a new parametrization AB - A new approach to the parametrization of the CKM matrix, V, is considered in which V is written as a linear combination of the unit matrix I and a nondiagonal matrix U which causes inter-generational-mixing, that is V = cos theta I + i sin theta U. Such a V depends on three real parameters including the parameter theta. It is interesting that a value of theta = pi/4 is required to fit the available data on the CKM-matrix including CP-violation. Predictions of this fit for the angles alpha, beta and gamma for the unitarity triangle corresponding to V11V13* + V21V23* + V31V33* = 0, are given. For theta = pi/4, we obtain alpha = 88.46degrees, beta = 45.046degrees and gamma = 46.5degrees. These values are just about in agreement, within errors, with the present data. It is very interesting that the unitarity triangle is expected to be approximately a right-angle, isosceles triangle. Our prediction sin 20 = 1 is in excellent agreement with the value 0.99 +/- 0.15 +/- 0.05 reported by the Belle collaboration at the Lepton-Photon 2001 meeting MH - India MH - Mexico|Yucatan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000184913700005 L2 - CKM matrix;unitarity triangle;KOBAYASHI-MASKAWA MATRIX; QUARK MASS MATRICES; CP-VIOLATION; PARTICLE PHYSICS; NONCONSERVATION; NEUTRINOS; DECAYS; MODEL SO - Modern Physics Letters A 2003 ;18(26):1825-1834 7685 UI - 7803 AU - Chaturvedi S AU - Gupta V AD - Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, IndiaCINVESTAV, Dept Fis Aplicada, Yucatan 97310, MexicoChaturvedi, S, Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, India TI - Model of the quark mixing matrix involving its eigenvalues AB - A model of the 3 x 3 Cabibbo-Kobayashi-Maskawa matrix, V, is presented in which the parameters are the eigenvalues and the components of its eigenvectors. In this model, the small departure of the experimentally determined V from being moduli symmetric (i.e. \V-ij\ = \V-ji\) is controlled by the small difference between two of the eigenvalues. In case any two eigenvalues are equal, one obtains a moduli symmetric V depending on only three parameters. Our model gives very good fits to the available data including CP-violation. Our value of sin 2beta approximate to 0.7 and other parameters associated with the "unitarity triangle" V11V13*+(V21V23V31V33*)-V-* = 0 are in good agreement with data and other analyses MH - India MH - Mexico|Yucatan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000184394400007 L2 - CKM matrix;quark mixing;KOBAYASHI-MASKAWA MATRIX; CP-VIOLATION; PARAMETRIZATION; MASS; ANGLES SO - Modern Physics Letters A 2003 ;18(23):1635-1642 7686 UI - 7958 AU - Chaty S AU - Charles PA AU - Marti J AU - Mirabel IF AU - Rodriguez LF AU - Shahbaz T AD - Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, EnglandCEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, FranceUniv Paris 07, F-91191 Gif Sur Yvette, FranceUniv Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandUniv Jaen, Escuela Politecn Super, Dept Fis, E-23071 Jaen, SpainConsejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaInst Astron, Morelia 58190, Michoacan, MexicoInst Astrofis Canarias, Tenerife 38205, SpainChaty, S, Open Univ, Dept Phys & Astron, Walton Hall, Milton Keynes MK7 6AA, Bucks, England TI - Optical and near-infrared observations of the microquasar V4641 Sgr during the 1999 September outburst AB - We present photometric and spectroscopic optical and near-infrared (NIR) observations taken during the outburst of the microquasar V4641 Sgr=SAX J1819.3-2525 in 1999 September. We observed an increase in the J-K-s colour between 5 and 8 d after the outburst, which we interpret as likely evidence for the presence of dust around the source. We also observed an extraordinarily strong, broad and variable Halpha line, with a velocity width of 4560 km s(-1), suggesting the presence of a high-velocity outflow component. We constrain the distance of the system between 3 and 8 kpc, locating it further away than previously derived from radio observations, but consistent with results from Orosz et al. We then discuss the nature of this system, showing that the companion star is either a B3-A2 main-sequence star or a B3-A2 subgiant crossing the Hertzsprung gap. The system is therefore an intermediate- or high-mass X-ray binary system (IMXB or HMXB). The distance derived by these optical/NIR observations implies that the jets observed by Hjellming et al. would then exhibit apparent velocities of similar to10c . We finally discuss the possibility of an interaction between the jets and surroundings of the source, and also of this source being a 'microblazar' MH - Argentina MH - United Kingdom MH - France MH - Mexico|Michoacan MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000184108200018 L2 - stars : individual : V4641 Sgr;stars : individual : SAX J1819.3-2525;stars : individual : XTE J1819-254;ISM : jets and outflows;infrared : stars;X-rays : binaries;BLACK-HOLE; GRS-1915+105; J1819.3-2525; VARIABILITY; SYSTEM; GALAXY; LINE; SGR SO - Monthly Notices of the Royal Astronomical Society 2003 ;343(1):169-174 7687 UI - 7072 AU - Chavarria A AU - Roger B AU - Fragoso G AU - Tapia G AU - Fleury A AU - Dumas M AU - Dessein A AU - Larralde C AU - Sciutto E AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoFac Med Marseille, INSERM, Unite 399, F-13385 Marseille 5, FranceNatl Autonomous Univ Mexico, Fac Vet Med & Zootecn, Dept Genet & Biostadist, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirug, Mexico City 14269, DF, MexicoUniv Limoges, Inst Epidemiol Neurol & Neurol Trop, F-87025 Limoges, FranceUNAM, Ctr Internacl Ciencia, Cuernavaca 62210, Morelos, MexicoSciutto, E, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, AP70228, Mexico City 04510, DF, Mexico TI - TH2 profile in asymptomatic Taenia solium human neurocysticercosis AB - Neurocysticercosis (NC), a parasitic disease caused by Taenia solium, may be either asymptomatic or have mild to severe symptoms due to several factors. In this study, the immunological factors that underlie NC pleomorphism were studied. Ten of the 132 inhabitants of a rural community in Mexico (Tepez) had a computerized tomography (CT) scan compatible with calcified NC, and all were asymptomatic. Their immunological profiles were compared with those of 122 CT scan negative (non-NC) subjects from the same village. NC was associated with a TH2 response (IgG4, IL-4, IL-5, IL-13). Subjects from Tepez had higher levels of specific antibodies (IgG1, IgG2, IgG4, IgE) and specific cell proliferation than subjects from an area with low exposure (Ensenada). This suggests that non-NC subjects from Tepez had been exposed to T solium and resisted infection in the brain. Distinct immunological profiles in equally exposed individuals differing in outcome of infection support the hypothesis of host-related factors in resistance to and pathogenesis of NC. This is the first study reporting the immunological profile associated with the asymptomatic form of NC. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Immunology;Microbiology;Virology U5 - J;Article AV - English IS - 1286-4579 UR - ISI:000186306200007 L2 - Taenia solium;neurocysticercosis;asymptomatic;immunological profiles;TH2 response;SCHISTOSOMA-MANSONI; CYSTICERCOSIS; HELMINTH; IGG4; IGE; INTERLEUKIN-5; ECHINOCOCCUS; REINFECTION; CRASSICEPS; RESISTANCE SO - Microbes and Infection 2003 ;5(12):1109-1115 7688 UI - 7080 AU - Chavez-Delgado ME AU - Mora-Galindo J AU - Gomez-Pinedo U AU - Feria-Velasco A AU - Castro-Castaneda S AU - Toral FALD AU - Luquin-De Anda S AU - Garcia-Segura LM AU - Garcia-Estrada J AD - CIATEJ, Div Patol & Biotecnol Ambiental, Guadalajara 44270, Jalisco, MexicoHosp Reg Gen 110, Dept Otorhinolaryngol, IMSS, Guadalajara, Jalisco, MexicoCtr Invest Biomed Occidente, IMSS, Guadalajara, Jalisco, MexicoUniv Guadalajara, Unidad Morfol Alta Resoluc, Ctr Univ Ciencias Biol & Agropecuarias, Zapopan, Jalisco, MexicoHosp Gen Zona 89, IMSS, Dept Cirugia, Guadalajara, Jalisco, MexicoUniv Guadalajara, Inst Madera Celulosa & Papel, Zapopan, Jalisco, MexicoUniv Guadalajara, Ctr Univ Ciencias Salud, Guadalajara 44430, Jalisco, MexicoInst Cajal, E-28002 Madrid, SpainChavez-Delgado, ME, CIATEJ, Div Patol & Biotecnol Ambiental, Av Normalistas 800 SH Colinas Normal,Apdo P2-191, Guadalajara 44270, Jalisco, Mexico TI - Facial nerve-regeneration through progesterone-loaded chitosan prosthesis. A preliminary report AB - Biodegradable nerve guides have, represented new treatment alternatives for nerve repairing. They are graduallly biodegradable, exert biological effects directly to the injured nerve, and act as drug- or cell-delivery devices. Furthermore, progesterone (PROG) has been demon-m strated. to promote injured peripheral nerve regeneration. In this study, it was hypothesized that PROG delivered from chitosan prostheses provides better facial nerve regenerative response than chitosan prostheses with no PROG. As there are no reports on the use of the former as nerve-guide material in the regeneration of injured nerves, this is the main objective of the present work. Chitosan prostheses containing PROG were used to bridge 10-mm gaps in rabbit facial nerves. The regenerated nerves were evaluated 45 days after implantation in animals with the use of light microscopy and morphometric analysis. Gas chromatography was used in order to quantify PROG content in prosthesis prior to and after implantation in subcutaneous tissue at different periods of up to 60 days. In addition, the prosthesis walls were evaluated with histological techniques in order to assess their integrity and the surrounding tissue reaction. Chitosan prostheses allowed PROG release during the time needed for nerve regeneration. At 45 days myelinated nerve fibers were observed in both the proximal and distal stumps. This parameter and the N ratio were higher in the progesterone-treated group when compared to that of the vehicle control. Findings indicate that chitosan prostheses were useful in nerve regeneration, acting as a long-lasting PROG delivery device a faster nerve regeneration. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Jalisco MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0021-9304 UR - ISI:000186347100005 L2 - progesterone;chitosan;nerve regeneration;drug delivery;nerve guide;prosthesis;TISSUE ENGINEERING APPLICATIONS; DRIED ALGINATE GEL; RAT SCHWANN-CELLS; PERIPHERAL-NERVES; MUSCLE GRAFTS; IN-VITRO; REPAIR; RECONSTRUCTION; GUIDE; TUBES SO - Journal of Biomedical Materials Research Part B-Applied Biomaterials 2003 ;67B(2):702-711 7689 UI - 7187 AU - Chavez-Garcia FJ AU - Stephenson WR AD - Natl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoInst Geol & Nucl Sci Ltd, Lower Hutt, New ZealandChavez-Garcia, FJ, Natl Autonomous Univ Mexico, Inst Ingn, Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - Reply to "Comment on '3D site effects: A thorough analysis of a high-quality dataset,' by F. J. Chavez-Garcia, J. Castillo, and W. R. Stephenson," by R. Paolucci and E. Faccioli MH - Mexico|Distrito Federal MH - New Zealand PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Editorial Material AV - English IS - 0037-1106 UR - ISI:000186096000034 L2 - SEDIMENT-FILLED VALLEYS; SEISMIC RESPONSE; MEXICO-CITY; NEW-ZEALAND; SH-WAVES; P-WAVES; MOTION; PARKWAY SO - Bulletin of the Seismological Society of America 2003 ;93(5):2306-2316 7690 UI - 6638 AU - Chavez-Reyes A AU - Parant JM AU - Amelse LL AU - Luna RMD AU - Korsmeyer SJ AU - Lozano G AD - Univ Texas, MD Anderson Canc Ctr, Dept Mol Genet, Houston, TX 77030, USAUniv Autonoma Nuevo Leon, Sch Biol Sci, Dept Microbiol & Immunol, Monterrey, MexicoHarvard Univ, Sch Med, Dana Farber Canc Inst, Dept Pathol, Boston, MA 02115, USAHarvard Univ, Sch Med, Dana Farber Canc Inst, Dept Med, Boston, MA 02115, USALozano, G, Univ Texas, MD Anderson Canc Ctr, Dept Mol Genet, 1515 Holcombe Blvd, Houston, TX 77030 USA TI - Switching mechanisms of cell death in mdm2- and mdm4-null mice by deletion of p53 downstream targets AB - The p53 tumor suppressor ensures maintenance of genome integrity by initiating either apoptosis or cell cycle arrest in response to DNA damage. Deletion of either mdm2 or mdm4 genes, which encode p53 inhibitors, results in embryonic lethality. The lethal phenotypes are rescued in the absence of p53, which indicates that increased activity of p53 is the cause of lethality in the mdm2- and mdm4-null embryos. Here we show that mdm2-null embryos die because of apoptosis initiated at 3.5 days postcoitum (dpc). Partial rescue of mdm2-null embryos by deletion of bax allows survival to 6.5 dpc and alters the mechanism of death from apoptosis to cell cycle arrest, indicating that bax is a critical component of the p53 pathway in early embryogenesis. The death of mdm4-null embryos is due to p53-initiated cell cycle arrest at 7.5 dpc. Deletion of p21(p21(waf1/cip1)), a p53 downstream target partially responsible for cell cycle arrest, does not rescue this phenotype; however, deletion of p21 alters the mechanism of cell death from lack of proliferation to apoptosis. Thus, in both examples, deletion of a p53 downstream target gene allows p53 to redirect its efforts, highlighting a high degree of plasticity in p53 function MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 16 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000187580300016 L2 - HUMAN-MALIGNANT GLIOMAS; TUMOR-SUPPRESSOR P53; WILD-TYPE P53; IN-VIVO; EMBRYONIC LETHALITY; CYCLE ARREST; MDM2-DEFICIENT MICE; POTENTIAL MEDIATOR; GENE AMPLIFICATION; MDM2 GENE SO - Cancer Research 2003 ;63(24):8664-8669 7691 UI - 8659 AU - Chavez-Rios R AU - rias-Romero LE AU - maraz-Barrera MD AU - Hernandez-Rivas R AU - Guillen N AU - Vargas M AD - IPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City 07360, DF, MexicoInst Pasteur, INSERM, U389, Unite Biol Cellulaire Paasitisme, F-75724 Paris, FranceVargas, M, IPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Apto Postal 14-470, Mexico City 07360, DF, Mexico TI - L10 ribosomal protein from Entamoeba histolytica share structural and functional homologies with QM/Jif-1: proteins with extraribosomal functions AB - In the present work, the complete amino acid sequence of the Entamoeba histolytica ribosomal protein L10 (EhL10) is reported. cDNA of 630 by revealed an open reading frame that encodes a protein of 210 amino acids. Analysis of EhL10 ribosomal protein revealed 75% similarity and 57% identity with QM protein from Homo sapiens and 78 and 60%, respectively, with Arabidopsis thaliana. Western blot analysis of ribosomal proteins from E. histolytica showed that EhL10 protein is part of the ribosomal complex. Immunofluorescence analysis of EhL10 distribution in a transfected E. histolytica strain showed that EhL10 protein was mainly localized in the nucleus of trophozoites. Overexpression of EhL10 ribosomal protein in trophozoites transfected with the pExEhNeo/EhL10 vector exhibited a 60% reduction in cellular growth. DNA mobility-shift assays demonstrated that EhL10 ribosomal protein was able to destabilize the activating protein 1 (AP-1) complex binding specifically to the c-Jun-like protein. It is proposed in this study that the complex formation of EhL10 with c-Jun-like protein interferes with transcriptional activation of genes controlled by Jun (i.e. gene involved in cell growth). It is also being reported identification of a member of the AP-1 complex, the c-Jun-like protein, in nuclear extracts of E. histolytica using human-specific antibodies against this protein. The observations suggest that EhL10 may have an extraribosomal function in E. histolytica involved in suppression of cell proliferation in E. histolytica similar to the QM protein. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Parasitology U5 - J;Article AV - English IS - 0166-6851 UR - ISI:000182385200006 L2 - L10;ribosomal protein;QM;Jif-1;c-Jun;AP-1;Entamoeba histolytica;SACCHAROMYCES-CEREVISIAE; MESSENGER-RNA; C-JUN; BINDING; CELLS; TRANSCRIPTION; LEVEL SO - Molecular and Biochemical Parasitology 2003 ;127(2):151-160 7692 UI - 6392 AU - Chavez-Villalba J AU - Cochard JC AU - Le Pennec M AU - Barret J AU - Enriquez-Diaz M AU - Caceres-Martinez C AD - Inst Univ Europeen Mer, CNRS, UMR 6539, F-29280 Plouzane, FranceUniv Autonoma Baja California Sur, La Paz, Baja Calif Sur, MexicoCtr Invest Biol Noroeste, Guaymas Unit, Guaymas 85465, Sonora, MexicoInst Francais Rech Exploitat Mer, Ctr Brest, Lab Physiol Invertebres, F-29280 Plouzane, FranceChavez-Villalba, J, Inst Univ Europeen Mer, CNRS, UMR 6539, F-29280 Plouzane, France TI - Effects of temperature and feeding regimes on gametogenesis and larval production in the oyster Crassostrea gigas AB - The effect of feeding regimes and temperature on the beginning of gametogenesis in the Pacific oyster Crassostrea gigas (Thunberg) was examined under laboratory conditions. Oysters from two different culture sites in France, Baie des Veys (Department Manche) and La Tremblade (Department Charente-Maritime), were collected in January 2000 and exposed to four treatments, involving a period of maintenance at 10degreesC with or without feeding followed by a conditioning period at 19degreesC with or with feeding. Routine conditioning procedures at 19degreesC (direct conditioning), with or without food, were performed at the same time and were used as controls. Oocyte size was used to describe the evolution of gametogenesis in all treatments. Contrasting responses were noticed between samples from Baie des Veys (BV-oysters) and La Tremblade (LT-oysters). BV-oysters containing more tissue reserves than specimens from the other location used carbohydrates to support gametogenesis, while LT-oysters used proteins to fuel oocyte development. During the initial period at 10degreesC, fed BV-oysters began gametogenesis and produced mature oocytes, while unfed BV-oysters began gametogenesis, but at a slower rate. Fed LT-oysters began gametogenesis at 10degreesC, whereas unfed LT-oysters remained unchanged (early gametogenesis stage) during the cold phase and only initiated gametogenesis when the temperature was increased. Oysters conditioned without food produced significantly less oocytes than specimens conditioned with food, but no differences in larval yield (D-larvae) were detected amongst the different conditions and sampling locations. Only LT-oysters kept without food throughout the experiment did not produce oocytes at the end of the conditioning period. These experiments demonstrate that oocyte production in C. gigas is dependent upon food supply and temperature, but that oocyte quality under controlled conditions appears to be related to stored reserves in natural settings MH - France MH - Mexico|Baja California Sur MH - Mexico|Sonora PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000188365100019 L2 - conditioning;Crassostrea gigas;food;gametogenesis;temperature;PACIFIC OYSTER; BIOCHEMICAL-COMPOSITION; IRRADIANS LAMARCK; VIRGINICA GMELIN; THUNBERG; SCALLOP; REPRODUCTION; POPULATIONS; FRANCE; GROWTH SO - Journal of Shellfish Research 2003 ;22(3):721-731 7693 UI - 7167 AU - Chavez-Villalba J AU - Barret J AU - Mingant C AU - Cochard JC AU - Le Pennec M AD - Inst Univ Europeen Mer, CNRS, UMR 6539, F-29280 Plouzane, FranceIFREMER, Ctr Brest, Lab Physiol Invertebres, F-29280 Plouzane, FranceChavez-Villalba, J, CIBNOR, Guaymas Unit, AP 349, Sonora 85465, Mexico TI - Influence of timing of broodstock collection on conditioning, oocyte production, and larval rearing of the oyster, Crassostrea gigas (Thunberg), at six production sites in France AB - Gametogenic development and response to conditioning procedures of six samples of oysters Crassostrea gigas (Thunberg) collected in the Bassin d'Arcachon, each cultivated at a different production site along the Atlantic coast of France were compared simultaneously from December 1998 to July 1999. Oysters were conditioned with and without food (fed oysters and unfed oysters, respectively). Samples at northern production sites (Baie des Veys, Aber Benoit, and Baden) initiated gonadal development and spawning about one month earlier than those at southern production sites (Bouin, La Tremblade, and Arcachon). Three conditioning experiments (December 1998 to February 1999, February to April 1999, and April to June 1999) favored Baie des Veys and Aber Benoit oysters, because these resulted in higher body component indices and higher proportions of mature oocytes in the three conditionings that produced more gametes than the other samples in all experiments. Unfed oysters from Baie des Veys and Aber Benoit produced viable gametes and larvae in all the experiments. No significant difference was observed in larval culture (growth and mortality) among samples, of both fed and unfed animals. Differences in the timing of gametogenesis and response to conditioning among northern and southern samples seem adaptive and non-genetic in nature, since all oysters were collected from the same population in the bay at Arcachon. Nutrient recycling seems to have been an important regulating factor for gametogenesis in the northern samples. The occurrence of oysters in different locales having differences in the timing of gametogenesis and response to conditioning has implications for spat production in hatcheries MH - France MH - Mexico|Sonora PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000186096200014 L2 - conditioning;Crassostrea gigas;gametogenesis;larvae;oocytes;PACIFIC OYSTER; VIRGINICA GMELIN; PECTEN-MAXIMUS; OSTREA-EDULIS; TEMPERATURE; SCALLOP; GROWTH; REPRODUCTION; POPULATIONS; MATURATION SO - Journal of Shellfish Research 2003 ;22(2):465-474 7694 UI - 8928 AU - Chavez D AU - Ochoa A AU - Madrigal D AU - Castillo M AU - Espinoza K AU - Gonzalez T AU - Velez E AU - Melendez J AU - Garcia JD AU - Rivero IA AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, CanadaRivero, IA, Inst Tecnol Tijuana, Ctr Grad & Invest, Apartado Postal 1166, Tijuana 22000, BC, Mexico TI - Method for analysis of polymer-supported organic compounds using mass spectrometry direct insertion AB - A new approach on the use of mass spectrometry direct-insertion and a quadrupole detector for analysis of organic compounds supported in solid phase has been developed. This is a simple and efficient method based on cleavage due to the thermal-instability of the benzylic group of most commercial resins. The cleavage of supported compounds takes place in the spectrometer as a consequence of the high temperature in the instrument's chamber. These compounds are detected using a similar fragmentation pattern and a molecular ion corresponding to the same compound obtained by traditional synthesis. Polymer degradation fragments do not interfere with the spectrum interpretation, because only a few peaks and low intensities are detected. We report here the identification of different types of compounds supported in Merrifield resin, such as bis-o-aminobenzamides and simple aromatic and aliphatic compounds, using this new approach MH - Canada MH - Mexico|Baja California PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Applied;Chemistry, Medicinal;Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1520-4766 UR - ISI:000181535900011 L2 - SOLID-PHASE-SYNTHESIS; LASER-DESORPTION IONIZATION; HIGH-RESOLUTION H-1-NMR; C-13 NMR ANALYSIS; COMBINATORIAL CHEMISTRY; RESIN BEAD; LIBRARIES; SPECTROSCOPY; SPECTRA; TOOL SO - Journal of Combinatorial Chemistry 2003 ;5(2):149-154 7695 UI - 9399 AU - Chavez E AU - Navarro G AD - Univ Chile, Dept Comp Sci, Santiago, ChileUniv Michoacana, Escuela Ciencias Fisicomatemat, Morelia 58240, Michoacan, MexicoNavarro, G, Univ Chile, Dept Comp Sci, Santiago, Chile TI - Probabilistic proximity search: Fighting the curse of dimensionality in metric spaces AB - Proximity searches become very difficult on "high dimensional" metric spaces, that is, those whose histogram of distances has a large mean and/or a small variance. This so-called "curse of dimensionality", well known in vector spaces, is also observed in metric spaces. The search complexity grows sharply with the dimension and with the search radius. We present a general probabilistic framework applicable to any search algorithm and whose net effect is to reduce the search radius. The higher the dimension, the more effective the technique. We illustrate empirically its practical performance on a particular class of algorithms, where large improvements in the search time are obtained at the cost of a very small error probability. (C) 2002 Elsevier Science B.V All rights reserved MH - Chile MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Information Systems U5 - J;Article AV - English IS - 0020-0190 UR - ISI:000180370700007 L2 - metric spaces;proximity searching;nearest neighbor searching;distance based indexing;probabilistic algorithms;approximation algorithms;QUERIES SO - Information Processing Letters 2003 ;85(1):39-46 7696 UI - 8171 AU - Chavez FP AU - Ryan J AU - Lluch-Cota SE AU - Niquen M AD - Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039, USANW Biol Res Ctr, Fisheries Program, La Paz, Baja California, MexicoInst Mar Peru, Chucuito, PeruChavez, FP, Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA TI - Sardine fishing in the early 20th century - Response MH - USA MH - Mexico|Baja California MH - Peru PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000183774900021 SO - Science 2003 ;300(5628):2033-2033 7697 UI - 9520 AU - Chavez FP AU - Ryan J AU - Lluch-Cota SE AU - Niquen M AD - Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039, USANW Biol Res Ctr, Fisheries Program, La Paz, Baja California, MexicoInst Mar Peru, Callao, PeruChavez, FP, Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA TI - From anchovies to sardines and back: Multidecadal change in the Pacific Ocean MH - USA MH - Mexico|Baja California MH - Peru PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 224 U4 - Multidisciplinary Sciences U5 - J;Review AV - English IS - 0036-8075 UR - ISI:000180284000028 L2 - EL-NINO; CALIFORNIA CURRENT; VARIABILITY; FLUCTUATIONS; POPULATIONS; OSCILLATION; SYSTEM; MODEL SO - Science 2003 ;299(5604):217-221 7698 UI - 7661 AU - Chazdon RL AU - Careaga S AU - Webb C AU - Vargas O AD - Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USAComis Nacl Conocimiento & Uso Biodiversidad, Tlalpan 14010, DF, MexicoYale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06511, USAReserva Ecol Bijagual Sarapiqui, Puerto Viejo Sarapiqui, Costa RicaChazdon, RL, Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269 USA TI - Community and phylogenetic structure of reproductive traits of woody species in wet tropical forests AB - We compare the distribution of reproductive traits in woody vegetation of 10 wet tropical forests in northeastern Costa Rica. Based on quantitative sampling of seedlings, saplings, and trees, we assess whether particular sexual systems, pollination syndromes, or seed-dispersal modes are associated With successional stage, prior selective logging, woody growth forms, or patterns of abundance or rarity. We further examine the phylogenetic structure of these traits in the regional woody flora, testing explicit hypotheses regarding phylogenctic clustering of reproductive traits and habitat distributions. Animal dispersal and insect pollination predominate across all. forest types and size classes. In second-growth trees, relative abundance of species with explosive dispersal, hermaphroditic flowers, and insect pollination is higher, and relative abundance of species with animal dispersal and mammal pollination is lower, compared to old-growth and logged forests. Overall, dioecy and wind dispersal are more frequent than expected in canopy trees, and hermaphroditic flowers are more frequent than expected in shrubs. Reproductive traits, growth-form traits, and relative abundance patterns show significant clustering within the supertree phylogeny. Patterns of trait distribution across forest types are closely linked with patterns of floristic composition at the genus and family level. Species-level associations among reproductive traits and woody growth form can be explained by phylogenetic correlations. Wind dispersal and hummingbird pollination are significantly concentrated in clades with hermaphroditic flowers, whereas wind pollination is concentrated in clades with unisexual flowers. Legacies of both phylogenetic history and forest disturbance structure the distribution of reproductive traits within and among tropical wet forest communities MH - Costa Rica MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 30 U4 - Ecology U5 - J;Article AV - English IS - 0012-9615 UR - ISI:000184866400001 L2 - Costa Rica;forest regeneration;logged forest;old-growth forest;phylogenetic conservatism;pollination;reproductive traits;second-growth forest;seed dispersal;sexual systems;wet tropical forest;LOWLAND RAIN-FOREST; PLANT-POLLINATOR INTERACTIONS; COSTA-RICA; SEED SIZE; SECONDARY SUCCESSION; CORRELATED EVOLUTION; DIPTEROCARP FOREST; BREEDING SYSTEMS; FLOWERING PLANTS; WIND POLLINATION SO - Ecological Monographs 2003 ;73(3):331-348 7699 UI - 8821 AU - Chazottes JR AU - Ugalde E AD - Ecole Polytech, CNRS, CPHT, F-91128 Palaiseau, FranceUASLP, IICO, San Luis Potosi, MexicoChazottes, JR, Ecole Polytech, CNRS, CPHT, F-91128 Palaiseau, France TI - Projection of Markov measures may be Gibbsian AB - We study the induced measure obtained from a 1-step Markov measure, supported by a topological Markov chain, after the mapping of the original alphabet onto another one. We give sufficient conditions for the induced measure to be a Gibbs measure (in the sense of Bowen) when the factor system is again a topological Markov chain. This amounts to constructing, when it does exist, the induced potential and proving its Holder continuity. This is achieved through a matrix method. We provide examples and counterexamples to illustrate our results MH - France MH - Mexico|San Luis Potosi PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-4715 UR - ISI:000181918100009 L2 - Markov chains;Gibbs measures;thermodynamic formalism;coding;projective metrics;SYSTEMS; ENTROPY SO - Journal of Statistical Physics 2003 ;111(5-6):1245-1272 7700 UI - 7576 AU - Cheang-Wong JC AU - Jergel M AU - Jergel M AU - Chromik S AU - Strbik V AU - Falcony C AD - UNAM, Inst Fis, Mexico City 01000, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoSlovak Acad Sci, Inst Elect Engn, Bratislava 84104, SlovakiaCheang-Wong, JC, UNAM, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - RBS characterization of MgB2 superconducting films annealed ex situ and in situ AB - The elemental composition and depth profiles of MgB2 films prepared by successive e-beam evaporation as well as by thermal co-deposition of Mg and B components were investigated by Rutherford backscattering spectrometry (RBS). In the case of films deposited by e-beam evaporation we studied both Mg-B precursors and appropriate MgB2 films grown on glassy carbon, Si(100) and J-sapphire substrates annealed in situ. For the films co-deposited by thermal evaporation on R-sapphire substrates and annealed ex situ we investigated superconducting MgB2 films only. The T-co values of all MgB2 films ranged from 21 to 30 K. Because of a very fine granular structure of the annealed films, confirmed also by SEM observations, we could not identify any MgB2 phase from x-ray diffraction (XRD) patterns. On the other hand, Mg2Si phase has been detected by XRD on the film-substrate interface for the superconducting film deposited on Si(100) substrate. The RBS measurements were performed with a 3.1 MeV He-4(+) beam. Under these conditions, the O-16(alpha,alpha)(16) elastic resonance allowed us to detect oxygen in all studied samples especially in B layers. The depth profiles of precursors prepared by successive e-beam evaporation showed clearly the multilayer film structure consisting of B and Mg layers. A strong interdiffusion between B and Mg layers may be observed after an in situ annealing, but still some degree of non-homogeneous component distribution may be observed. On the other hand, the MgB2 films co-deposited by thermal evaporation and annealed ex situ are much more homogeneous, but a higher content of oxygen is present MH - Mexico|Distrito Federal MH - Slovakia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-2048 UR - ISI:000185039600009 L2 - PULSED-LASER DEPOSITION; THIN-FILMS; MAGNESIUM DIBORIDE; ION-BEAM SO - Superconductor Science & Technology 2003 ;16(8):879-884 7701 UI - 8442 AU - Chehata D AU - Zenit R AU - Wassgren CR AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPurdue Univ, Sch Mech Engn, W Lafayette, IN 47907, USAZenit, R, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Dense granular flow around an immersed cylinder AB - The flow around a fixed cylinder immersed in a uniform granular flow is studied experimentally. Experiments are performed in a tall vertical chute producing a quasi two-dimensional granular flow. A storage bin at the top of the chute feeds glass particles into the channel while the mean velocity of the flow is controlled by varying the exit width of a hopper located at the channel bottom. Measurements of the drag force acting on a fixed cylinder are made using a strain gauge force measurement system. The flow velocity field is measured through a transparent wall using a particle image velocimetry analysis of high speed video recordings of the flow. Experiments are performed for a range of upstream particle velocities, cylinder diameters, and two sizes of glass particles. For the range of velocities studied, the mean drag force acting on the cylinder is independent of the mean flow velocity, contrary to what is expected from any ordinary fluid. The drag force increases with cylinder diameter and decreases with particle diameter. The drag force scales with the asymptotic static stress state in a tall granular bed. The drag coefficient, defined in terms of a dynamic pressure and an effective cylinder diameter, scales with the flow Froude number based on the hydraulic diameter of the channel. This analysis indicates that the drag acting on the cylinder is strongly affected by the surrounding channel geometry. Although the drag force on the cylinder does not change with the upstream flow velocity, the flow streamlines do change with velocity. A large stagnation zone forms at the leading edge of the cylinder while at the trailing edge an empty wake is observed. The wake size increases with flow velocity. Measurements of the flow vorticity and granular temperature are also presented and discussed. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-6631 UR - ISI:000182795300025 L2 - MATERIALS ROUND OBSTACLES; GRAVITY FLOW; DRAG; FLUCTUATIONS; RESISTANCE; INSERTS; SAND; SILO SO - Physics of Fluids 2003 ;15(6):1622-1631 7702 UI - 4222 AU - Chemsak JA AU - Noguera FA AD - Univ Calif Berkeley, Essig Museum Entomol, Berkeley, CA 94720, USAIBUNAM, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoChemsak, JA, Univ Calif Berkeley, Essig Museum Entomol, 201 Wellman Hall, Berkeley, CA 94720 USA TI - New species of the genus Tetraopes Schoenherr (Coleoptera : Cerambycidae) AB - Three new species of the genus Tetraopes Schoenherr are described: T. crassus and T. crinitus from Mexico and T. skillmani from Arizona. A key to all species is included and the new species are illustrated T. mankinsi Chemsak and Linsley is transferred into Phaea Newman, new combination MH - USA MH - Mexico|Jalisco PB - SAN FRANCISCO: PACIFIC COAST ENTOMOL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0031-0603 UR - ISI:000224180900011 L2 - insecta;Coleoptera;Cerambycidae;Tetraopes;new species;key SO - Pan-Pacific Entomologist 2003 ;79(3-4):237-244 7703 UI - 7282 AU - Chemsak JA AU - Noguera FA AD - Univ Calif Berkeley, Essig Museum Entomol, Berkeley, CA 94720, USAEstac Biol Chamela, San Patricio, Jalisco, MexicoChemsak, JA, Univ Calif Berkeley, Essig Museum Entomol, Wellman Hall, Berkeley, CA 94720 USA TI - New species of Anelaphus Linsley from Mexico, central and South America (Coleoptera; Cerambycidae) AB - Six NEW SPECIES of the elaphidiine genus Anelaphus Linsley are described and illustrated: A. albopilus, A. hirtus, A. yucatecus from Mexico; A. pilosus from Honduras, A. tikalinus from Guatemala, and A. colombianus from Colombia MH - USA MH - Mexico|Jalisco PB - SAN FRANCISCO: PACIFIC COAST ENTOMOL SOC RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0031-0603 UR - ISI:000185773000007 L2 - Insecta;Coleoptera;Cerambycidae;new species;Anelaphus;Mexico;Honduras;Guatemala;Colombia SO - Pan-Pacific Entomologist 2003 ;79(1):58-65 7704 UI - 9474 AU - Chen B AU - Solis F AD - Univ Wyoming, Dept Math, Laramie, WY 82071, USACIMAT, Dept Math, Guanajuato 36000, MexicoChen, B, Univ Wyoming, Dept Math, Laramie, WY 82071, USA TI - Explicit mixed finite order Runge-Kutta methods AB - We investigate the asymptotic behavior of systems of nonlinear differential equations and introduce a family of mixed methods from combinations of explicit Runge-Kutta methods. These methods have better stability behavior than traditional Runge-Kutta methods and generally extend the range of validity of the calculated solutions. These methods also give a way of determining if the numerical solutions are real or spurious. Emphasis is put on examples coming from mathematical models in ecology. (C) 2002 IMACS. Published by Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000180314200002 SO - Applied Numerical Mathematics 2003 ;44(1-2):21-30 7705 UI - 7114 AU - Chen TH AU - Small DA AU - Wu LQ AU - Rubloff GW AU - Ghodssi R AU - Vazquez-Duhalt R AU - Bentley WE AU - Payne GF AD - Univ Maryland, Ctr Biosyst Res, Inst Biotechnol, College Pk, MD 20742, USAUniv Maryland Baltimore Cty, Dept Chem & Biochem Engn, Baltimore, MD 21250, USAUniv Maryland, Dept Chem Engn, College Pk, MD 20742, USAUniv Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742, USAUniv Maryland, Syst Res Inst, College Pk, MD 20742, USAUniv Maryland, Dept Elect & Comp Engn, College Pk, MD 20742, USAUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoPayne, GF, Univ Maryland, Ctr Biosyst Res, Inst Biotechnol, 5115 Plant Sci Bldg, College Pk, MD 20742 USA TI - Nature-inspired creation of protein-polysaccharide conjugate and its subsequent assembly onto a patterned surface AB - A protein's functional properties can be adjusted by conjugating it to other polymers. We used a nature-inspired route to create a protein-polysaccharide conjugate and examined the properties of this conjugate. Specifically, the enzyme tyrosinase was used to oxidize accessible tyrosine residues of the model protein green fluorescent protein (GFP). Oxidation yields quinone residues that are "activated" for the covalent conjugation of GFP to nucleophilic groups of the aminopolysaccharide chitosan. Conjugation to chitosan conferred distinct properties to GFP. The GFP-chitosan conjugate was observed to have pH-responsive, "smart" properties, and GFP could be conjugated onto a gel matrix. Additionally, the GFP-chitosan conjugate can be selectively deposited onto a micropatterned surface in response to an applied voltage. This nature-inspired method provides a simple and safe method to conjugate proteins to chitosan, and these conjugates can be readily assembled onto patterned surfaces MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000186177200043 L2 - GREEN FLUORESCENT PROTEIN; CROSS-LINKING; ADHESIVE PROTEINS; WATER-SOLUBILITY; N-ACETYLATION; CHITOSAN; POLYMERS; MONOLAYERS; REACTIVITY; DEPOSITION SO - Langmuir 2003 ;19(22):9382-9386 7706 UI - 9221 AU - Cheng D AU - Trapaga G AU - McKelliget JW AU - Lavernia EJ AD - SUNY Albany, Sch Nanosci & Nanoengn, Albany, NY 12203, USACINVESTAV, Unidad Queretaro, Queretaro 76230, Qro, MexicoUniv Lowell, Dept Mech Engn, Lowell, MA 01854, USAUniv Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616, USACheng, D, SUNY Albany, Sch Nanosci & Nanoengn, 1535 Western Ave, Albany, NY 12203 USA TI - Mathematical modelling of high velocity oxygen fuel thermal spraying of nanocrystalline materials: an overview AB - An emerging application of nanocrystalline materials involves the deposition of nanocrystalline coatings using high velocity oxygen fuel (HVOF) thermal spraying. Since the physical, mechanical, and chemical characteristics of a nanocrystalline coating are critically influenced by the HVOF operating parameter, mathematical modelling is increasingly being used to establish a fundamental understanding of the process, to maximize coating performance, and to minimize the amount of experimentation required. In this paper, the modelling of HVOF thermal-spray processes, including combustion, gas dynamics, momentum, and thermal transfer between the particle and gas phase, as well as the impact of particles onto a substrate is reviewed. Particular attention is paid to topics that are particularly relevant to the thermal spraying of nanocrystalline coatings MH - Mexico|Queretaro MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Review AV - English IS - 0965-0393 UR - ISI:000180866800001 L2 - NUMERICAL-SIMULATION; GRAIN-GROWTH; DROPLETS; PLASMA; GAS; SOLIDIFICATION; PARTICLES; BEHAVIOR; COATINGS; TORCH SO - Modelling and Simulation in Materials Science and Engineering 2003 ;11(1):R1-R31 7707 UI - 9133 AU - Cheng NH AU - Pittman JK AU - Barkla BJ AU - Shigaki T AU - Hirschi KD AD - Baylor Coll Med, USDA ARS, Childrens Nutr Res Ctr, Houston, TX 77030, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62250, Morelos, MexicoBaylor Coll Med, Dept Human & Mol Genet, Houston, TX 77030, USATexas A&M Univ, Vegetable & Fruit Improvement Ctr, College Stn, TX 77845, USAHirschi, KD, Baylor Coll Med, USDA ARS, Childrens Nutr Res Ctr, Houston, TX 77030 USA TI - The Arabidopsis cax1 mutant exhibits impaired ion homeostasis, development, and hormonal responses and reveals interplay among vacuolar transporters AB - The Arabidopsis Ca2+/H+ transporter CAX1 (Cation Exchanger1) may be an important regulator of intracellular Ca2+ levels. Here, we describe the preliminary localization of CAX1 to the tonoplast and the molecular and biochemical characterization of cax1 mutants. We show that these mutants exhibit a 50% reduction in tonoplast Ca2+/H+ antiport activity, a 40% reduction in tonoplast V-type H+-translocating ATPase activity, a 36% increase in tonoplast Ca2+-ATPase activity, and increased expression of the putative vacuolar Ca2+/H+ antiporters CAX3 and CAX4. Enhanced growth was displayed by the cax1 lines under Mn2+ and Mg2+ stress conditions. The mutants exhibited altered plant development, perturbed hormone sensitivities, and altered expression of an auxin-regulated promoter-reporter gene fusion. We propose that CAX(1) regulates myriad plant processes and discuss the observed phenotypes with regard to the compensatory alterations in other transporters MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 44 U4 - Biochemistry & Molecular Biology;Plant Sciences;Cell Biology U5 - J;Article AV - English IS - 1040-4651 UR - ISI:000181008700005 L2 - CYTOSOLIC-FREE CALCIUM; PLASMA-MEMBRANE; SACCHAROMYCES-CEREVISIAE; SALT TOLERANCE; H+-ATPASE; H+/CA2+ ANTIPORTER; MESSENGER-RNAS; PLANT VACUOLES; DET3 MUTANT; ZEA-MAYS SO - Plant Cell 2003 ;15(2):347-364 7708 UI - 6875 AU - Cherpitel CJ AU - Ye Y AU - Bond J AU - Borges G AD - Alcohol Res Grp, Inst Publ Hlth, Berkeley, CA 94709, USAInst Nacl Psiquiatria, Mexico City, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Mexico City, DF, MexicoCherpitel, CJ, Alcohol Res Grp, Inst Publ Hlth, 2000 Hearst Ave, Berkeley, CA 94709 USA TI - The causal attribution of injury to alcohol consumption: A cross-national meta-analysis from the Emergency Room Collaborative Alcohol Analysis Project AB - Background: Whereas a substantial literature exists documenting the association of alcohol and injuries, causal associations are less well established. Methods: The relationship of drinking-in-the-event variables with attributing a causal association of alcohol consumption and the injury event was examined by using meta-analysis across 13 emergency room studies from 8 countries included in the Emergency Room Collaborative Alcohol Analysis Project. Results: Pooled odds ratios for both log-transformed blood alcohol concentration at the time of the emergency room visit and the amount of alcohol consumed in the 6 hr before injury were positively predictive (1.19 and 1.80, respectively) and heterogeneous across studies. Effect size changed little when age and gender were controlled. When stratifying on reporting five or more drinks on an occasion during the last year (5+ yearly drinkers), the amount consumed was positively predictive of reporting a casual association of drinking and injury only for 5+ yearly drinkers. The effect size of feeling drunk at the time of injury, controlling for the amount of alcohol consumed, was positively predictive (2.04) but heterogeneous across studies. Meta-analysis regression found the level to which alcohol is consumed in a detrimental pattern to be a significant predictor of blood alcohol concentration, and of the amount consumed and feeling drunk at the time of injury, on causal attribution, with a lower detrimental pattern level with a larger effect size. Conclusions: The association of acute use of alcohol on causal attribution may be affected by chronic use to some extent, but this association is negatively affected by the degree to which a society exhibits harmful drinking patterns MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 9 U4 - Substance Abuse U5 - J;Article AV - English IS - 0145-6008 UR - ISI:000186820400015 L2 - causal attribution;alcohol injury;emergency room;drinking pattern;DRINKING PATTERNS; EVENT; INTERVENTION; ERCAAP; RISK SO - Alcoholism-Clinical and Experimental Research 2003 ;27(11):1805-1812 7709 UI - 7335 AU - Cherpitel CJ AU - Bond J AU - Ye Y AU - Borges G AU - Macdonald S AU - Stockwell T AU - Giesbrecht N AU - Cremonte M AD - Inst Publ Hlth, Alcohol Res Grp, Berkeley, CA 94709, USAInst Nacl Psiquiat, Mexico City, DF, MexicoCtr Addict & Mental Hlth, London, ON, CanadaCurtin Inst Technol, Natl Drug Res Inst, Perth, WA, AustraliaCtr Addict & Mental Hlth, Toronto, ON, CanadaUniv Nacl Mar Plata, Fac Psicol, Mar Del Plata, ArgentinaCherpitel, CJ, Inst Publ Hlth, Alcohol Res Grp, 2000 Hearst Ave, Berkeley, CA 94709 USA TI - Alcohol-related injury in the ER: A cross-national meta-analysis from the Emergency Room Collaborative Alcohol Analysis Project (ERCAAP) AB - Objective: To examine the impact of usual drinking patterns and related problems on the acute use of alcohol in injury. Method: The impact of quantity and frequency of drinking, alcohol problems and dependence symptoms on admission to the emergency room (ER) for an alcohol-related injury (based, separately, on a positive blood alcohol concentration [BAC] and self-reported drinking within 6 hours prior to injury). compared with a nonalcohol related injury, was examined using meta-analysis, across 15 ER studies covering seven countries. Results: Pooled effect size for consuming five or more drinks on an occasion at least monthly was significant but not homogeneous, with odds ratios (ORs) of 4.16 for BAC and 3.92 for self-report. Frequency of drinking among nonheavy drinkers was found to have the largest effect size (5.93 for BAC and 4.93 for self-report). Heavy drinking, controlling for frequency, was also significant (ORs of 2.08 for BAC and 1.86 for self-report), but effect size was homogeneous only for self-report. Effect sizes for consequences of drinking and dependence symptoms were also significant and homogeneous, with ORs of 4.29 and 3.55, respectively, for BAC, and 3.84 and 3.94, respectively, for self-report. In meta-regression analysis, among contextual variables the level to which alcohol use is stigmatized in the culture was most consistently predictive of heavy-drinking effect size on an alcohol-related injury, with larger effect sizes found in those studies reporting a lower level of stigmatization. Conclusions: Whereas quantity and frequency of drinking were both found to be highly predictive of an alcohol-related injury, sociocultural variables may affect observed associations of heavy drinking with an alcohol-related injury MH - Argentina MH - Australia MH - USA MH - Canada MH - Mexico|Distrito Federal PB - PISCATAWAY: ALCOHOL RES DOCUMENTATION INC CENT ALCOHOL STUD RUTGERS UNIV RP - NOT IN FILE U3 - TC 18 U4 - Substance Abuse;Psychology U5 - J;Article AV - English IS - 0096-882X UR - ISI:000185572200007 L2 - UNITED-STATES; DRINKING; CONSUMPTION; PATTERNS; RISK SO - Journal of Studies on Alcohol 2003 ;64(5):641-649 7710 UI - 8354 AU - Chettle DR AU - Arnold ML AU - Aro ACA AU - Fleming DEB AU - Kondrashov VS AU - McNeill FE AU - Moshier EL AU - Nie H AU - Rothenberg SJ AU - Stronach IM AD - McMaster Univ, Hamilton, ON L8S 4K1, CanadaWeber State Univ, Ogden, UT 84408, USAHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USAMt Allison Univ, Sackville, NB E4L 1E6, CanadaCharles R Drew Univ Med & Sci, Los Angeles, CA 90059, USAMt Sinai Sch Med, New York, NY 10029, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoQueen Elizabeth Hosp, Birmingham B15 2TH, W Midlands, EnglandChettle, DR, McMaster Univ, Hamilton, ON L8S 4K1, Canada TI - An agreed statement on calculating lead concentration and uncertainity in XRF in vivo bone lead analysis MH - Canada MH - United Kingdom MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Letter AV - English IS - 0969-8043 UR - ISI:000183206500011 SO - Applied Radiation and Isotopes 2003 ;58(5):603-605 7711 UI - 6121 AU - Chianelli RR AU - Berhault G AU - Yacaman MJ AU - Mehta A AU - Fuentes S AU - Alonso G AU - de la Rosa M AD - Univ Texas, Mat Res & Technol Inst, El Paso, TX 79968, USACNRS, LACCO, F-75700 Paris, FranceUniv Texas, Austin, TX 78712, USAStanford Synchrotron Radiat Lab, Stanford, CA, USACtr Ciencias Mat Condensada, Chihuahua, Mexico TI - HRTEM, synchrotron, and simulation techniques applied to activity and selectivity correlation in hydrodesulfurization catalysts MH - France MH - Mexico|Chihuahua MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187062402611 SO - Abstracts of Papers of the American Chemical Society 2003 ;226():U540-U540 7712 UI - 6504 AU - Chichinina T AU - Obolentseva I AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoRussian Acad Sci, Siberian Branch, Inst Geophys, Novosibirsk 630090, RussiaChichinina, T, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Using an anisotropic gyrotropic model for estimating gyration and attenuation constants AB - A new approach to estimating of shear-wave attenuation is proposed. The method is based on an assumption that an anisotropic attenuating geological medium possesses gyrotropic properties. Doing so allows to obtain attenuation constant together with gyrotropic constant. Some examples of experimental determination of gyration and attenuation constants are given. A presentation of the new way of determining shear-wave attenuation constant is proceeded by a brief elucidation of the main aspects of the phenomenological theory of gyrotropy. The most interesting and important phenomenon inherent to gyrotropy-rotation of shear-wave polarization plane-is illustrated. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Mining & Mineral Processing U5 - J;Article AV - English IS - 0926-9851 UR - ISI:000187951900020 L2 - gyrotropy;anisotropy;attenuation;polarization;ACOUSTICAL ACTIVITY; SEISMIC GYROTROPY SO - Journal of Applied Geophysics 2003 ;54(3-4):427-435 7713 UI - 8418 AU - Chimal-Monroy J AU - Rodriguez-Leon J AU - Montero JA AU - Ganan Y AU - Macias D AU - Merino R AU - Hurle JM AD - Univ Cantabria, Dept Anat & Biol Celular, Hosp Univ Marques Valecilla, Fac Med, Santander 39011, SpainUniv Cantabria, Unidad Invest, Hosp Univ Marques Valecilla, Fac Med, Santander 39011, SpainUNAM, Dept Biol Celular & Fisiol, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Gulbenkian Ciencias, Oeiras, PortugalUniv Extremadura, Dept Ciencias Morfol & Biol Celular & Anim, E-06071 Badajoz, SpainHurle, JM, Univ Cantabria, Dept Anat & Biol Celular, Hosp Univ Marques Valecilla, Fac Med, Santander 39011, Spain TI - Analysis of the molecular cascade responsible for mesodermal limb chondrogenesis: Sox genes and BMP signaling AB - Here, we have studied how Sox genes and BMP signaling are functionally coupled during limb chondrogenesis. Using the experimental model of TGFbeta1-induced interdigital digits, we dissect the sequence of morphological and molecular events during in vivo chondrogenesis. Our results show that Sox8 and Sox9 are the most precocious markers of limb cartilage, and their induction is independent and precedes the activation of BMP signaling. Sox10 appears also to cooperate with Sox9 and Sox8 in the establishment of the digit cartilages. In addition, we show that experimental induction of Sox gene expression in the interdigital mesoderm is accompanied by loss of the apoptotic response to exogenous BMPs. L-Sox5 and Sox6 are respectively induced coincident and after the expression of Bmpr1b in the prechondrogenic aggregate, and their activation correlates with the induction of Type II Collagen and Aggrecan genes in the differentiating cartilages. The expression of Bmpr1b precedes the appearance of morphological changes in the prechondrogenic aggregate and establishes a landmark from which the maintenance of the expression of all Sox genes and the progress of cartilage differentiation becomes dependent on BMPs. Moreover, we show that Ventroptin precedes Noggin in the modulation of BMP activity in the developing cartilages. In summary, our findings suggest that Sox8, Sox9, and Sox10 have a cooperative function conferring chondrogenic competence to limb mesoderm in response to BMP signals. In turn, BMPs in concert with Sox9, Sox6 and L-Sox5 would be responsible for the execution and maintenance of the cartilage differentiation program. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Portugal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 49 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000182965800006 L2 - L-sox5;Sox6;Sox8;Sox9;Sox10;Ventroptin;Gdf5;Noggin;interdigital cell death;PROGRAMMED CELL-DEATH; II COLLAGEN GENE; TGF-BETA-S; TRANSCRIPTION FACTOR; CHICK LIMB; CARTILAGE DIFFERENTIATION; CHONDROCYTE DIFFERENTIATION; SKELETAL DEVELOPMENT; MULTIPLE LINEAGES; MOUSE LIMB SO - Developmental Biology 2003 ;257(2):292-301 7714 UI - 7965 AU - Chinas-Castillo F AU - Spikes HA AD - Inst Tecnol Oaxaca, Oaxaca, Oax, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Mech Engn, Tribol Sect, London SW7 2BX, EnglandChinas-Castillo, F, Inst Tecnol Oaxaca, Wilfrido Massieu S-N, Oaxaca, Oax, Mexico TI - Mechanism of action of colloidal solid dispersions AB - In the past there has been considerable interest in the possibility of using liquid lubricants containing dispersed, solid particles in the 1-50 micron size range to reduce friction and wear. These particles are used in greases and some industrial oils. Researchers are now directing their attention to the behavior of much smaller colloidal particles in the range of 5 nm to 200 nm diameter. Such systems are formally known as "colloidal sols" and have been claimed to influence friction and wear Further reasons for studying such colloidal particles is that they are present in soot-contaminated engine lubricating oils, as wear debris and as partially-soluble additives. Thus, the objective of the work derived in this paper was to investigate the mechanism of action of colloidal solid particles in the range of 5 to 200 nm diameter in lubricating oils. Of particular interest was the effect of slide-roll ratio on particle entrainment and the influence of the ratio of particle diameter to elastohydrodynamic lubricant film thickness on particles' behavior This study has shown that in thin film contacts, colloid nanoparticles penetrate EHD contacts mainly by a mechanism of mechanical entrapment. It is found also that in rolling contacts at slow speeds, colloids formed a boundary film of at least 1 or 2 times the particle size. This film influence friction and wear However this film is lost at high speed and the film thickness reverts to the colloid-free fluid. The results of this study have enabled a mechanism of lubricating action by colloid sols to be derived MH - United Kingdom MH - Mexico|Oaxaca PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 0742-4787 UR - ISI:000184080100010 L2 - ELASTOHYDRODYNAMIC CONTACTS; PARTICLES; BEHAVIOR SO - Journal of Tribology-Transactions of the Asme 2003 ;125(3):552-557 7715 UI - 7500 AU - Chinchure AD AU - Munoz-Sandoval E AU - Gortenmulder TJ AU - Hendrikx RWA AU - Mydosh JA AD - Kamerlingh Onnes Lab, NL-2300 RA Leiden, NetherlandsInst Potosino Invest Cientif & Tecnol, Dept Mat Avanzados, San Luis Potosi 78231, SLP, MexicoMax Planck Inst Chem Phys Stoffe, D-01187 Dresden, GermanyHendrikx, RWA, Kamerlingh Onnes Lab, POB 9504, NL-2300 RA Leiden, Netherlands TI - Metallurgy and characterization of R2Ni2Pb intermetallic compounds AB - Using a special cooling procedure we have grown single crystal platelets of the newly discovered rare-earth R2Ni2Pb intermetallic compounds with R = Gd, Tb, Dy, Ho, and Er. The material was synthesized in a single-phase and on-stoichiometry form. We characterized the compounds by X-ray diffraction, electron probe micro-analysis, and Laue X-ray diffraction. Some physical properties are illustrated, e.g. magnetic susceptibility and resistivity. (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|San Luis Potosi MH - Netherlands PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000185298900003 L2 - rare earth compounds;transition metal compounds;crystal growth;electrical transport;magnetic measurements SO - Journal of Alloys and Compounds 2003 ;359():5-9 7716 UI - 8663 AU - Cho C AU - Sanchez CS AD - Chosun Univ, Sch Med, Res Div Biol Sci, Kwangju 501759, South KoreaNatl Autonom Univ, Dept Phys Anthropol, Mexico City, DF, Mexico TI - Finger dermatoglyphics of Mexican Indians AB - Fingerprints of 98 Mexican Indians, being 54 Atlahualco and 44 Totolacatla males and females have been analyzed. Whorls are less frequent in Atlahualco (39.4%) than in Totolacatla (41.4%) (p>0.01) and loops are more frequent in Atlahualco (58.7%) than in Totolacatla (57.6%) (p>0.01). The index of pattern intensity displays a lower value in Atlahualco (13.8) than in Totolacatla (14.1). The bimanual differences in both sexes are not statistically significant for the occurrence of patterns on the digits of the right and left hands from both groups (p>0.05). Also the difference between both sexes for the occurrence of patterns is not statistically significant in both groups (p>0.05). Incidences of actual symmetry on homologous digits represent 81.4% in Atlahualco and 79.6% in Totolacatla. The mean total ridge counts show 120.7 in Atlahualco and 130.9 in Totolacatla, respectively. There are statistically significant both in sexes of Atlahualco (p<0.01) and Totolacatla. (p<0.05). In conclusion, finger dermatoglyphic features of Atlahualco and Totolacatla are largely within the ranges of Mongoloids MH - Mexico|Distrito Federal MH - South Korea PB - SEOUL: GENETICS SOC KOREA RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0254-5934 UR - ISI:000182282600001 L2 - dermatoglyphics;fingerprint;Atlahualco;Totolacatla;pattern intensity index;total ridge counts SO - Korean Journal of Genetics 2003 ;25(1):1-7 7717 UI - 6943 AU - Cho TO AU - Riosmena-Rodriguez R AU - Boo SM AD - Chungnam Natl Univ, Dept Biol, Taejon 305764, South KoreaUABCS, Dept Biol Marina, Programa Invest Bot Marina, La Paz 23080, BCS, MexicoCho, TO, Univ SW Louisiana, Dept Biol, Box 42451, Lafayette, LA 70504 USA TI - First record of Ceramium giacconei (Ceramiaceae, Rhodophyta) in the North Pacific: Developmental morphology of vegetative and reproductive structures AB - The occurrence of the Mediterranean red alga Ceramium giacconei Cormaci et Furnari, in the northeastern Pacific Ocean (Gulf of California) is reported for the first time, associated with a rhodolith bed. Although C. giacconei is similar to C. cingulatum Webervan Bosse, known from the Indian Ocean, our observations confirm the validity of C. giacconei as a distinctive species on the basis of the following features: 1) erect thallus markedly compressed above several basal segments, 2) complete cortication except the basal segments, 3) unequal development of corticating filaments, 4) oblong axial cells, 5) solitary and straight apex, 6) tetrasporangia immersed in cortex and produced from both periaxial and cortical cells, 7) spermatangia produced from cortical cells, 8) cystocarps surrounded by 4 or 5 involucral branches. Sexual reproductive structures are described for the first time and conform to previous reports of the genus MH - Mexico|Baja California Sur MH - South Korea MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000186660600007 L2 - ceramiales;Ceramium giacconei;morphology;North Pacific Ocean;Rhodophyta;taxonomy;MEDITERRANEAN-SEA; GENUS CERAMIUM SO - Botanica Marina 2003 ;46(6):548-554 7718 UI - 8181 AU - Choi YM AU - Lee DS AU - Czerw R AU - Chiu PW AU - Grobert N AU - Terrones M AU - Reyes-Reyes M AU - Terrones H AU - Charlier JC AU - Ajayan PM AU - Roth S AU - Carroll DL AU - Park YW AD - Clemson Univ, Dept Mat Sci & Engn, Clemson, SC 29634, USASeoul Natl Univ, Dept Phys, Seoul, South KoreaSeoul Natl Univ, Condensed Matter Res Inst, Seoul, South KoreaMax Planck Inst Festkorperforsch, D-7000 Stuttgart, GermanyUniv Sussex, Nanosci & Nanotechnol Ctr, CPES, Brighton, E Sussex, EnglandIPIC&T, Adv Mat Dept, San Luis Potosi 78210, MexicoUniv Catholique Louvain, Unite Phys Chim & Phys Mat, B-1348 Louvain, BelgiumRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY, USACzerw, R, Clemson Univ, Dept Mat Sci & Engn, Clemson, SC 29634, USA TI - Nonlinear behavior in the thermopower of doped carbon nanotubes due to strong, localized states AB - The temperature dependent thermoelectric power (TEP) of boron- and nitrogen-doped multiwalled carbon nanotube mats has been measured showing that such dopants can be used to modify the majority conduction from p-type to n-type. The TEP of boron-doped nanotubes is positive, indicating hole-like carriers. In contrast, the nitrogen doped material exhibits negative TEP over the same temperature range, suggesting electron-like conduction. Therefore, the TEP distinct nonlinearities are primarily due to the formation of donor and acceptor states in the B- and N-doped materials. The sharply varying density of states used in our model can be directly correlated to the scanning tunneling spectroscopy studies of these materials MH - Belgium MH - United Kingdom MH - Germany MH - Mexico|San Luis Potosi MH - South Korea MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000183521500030 L2 - THERMOELECTRIC-POWER; ELECTRICAL-TRANSPORT; POLYMERS SO - Nano Letters 2003 ;3(6):839-842 7719 UI - 8801 AU - Chong-Martinez B AU - Buchanan TA AU - Wenby RB AU - Meiselman HJ AD - Univ So Calif, Keck Sch Med, Dept Physiol & Biophys, Los Angeles, CA 90033, USANatl Med Ctr, Especial Hosp, Dept Internal Med, Mexico City, DF, MexicoUniv So Calif, Keck Sch Med, Dept Med, Los Angeles, CA 90033, USAMeiselman, HJ, Univ So Calif, Keck Sch Med, Dept Physiol & Biophys, 1333 San Pablo St, Los Angeles, CA 90033 USA TI - Decreased red blood cell aggregation subsequent to improved glycaemic control in Type 2 diabetes mellitus AB - Aims Reports of rheological changes following intensification of metabolic control are limited and not concordant. The present study was designed to test the hypothesis that intensification of management of Type 2 diabetes (T2DM) with diet, exercise and insulin improves haemorheological behaviour by reducing red blood cell (RBC) aggregation. Methods Blood was sampled from 55 subjects before and following 14 +/- 3 weeks of intensified management. RBC aggregation was measured in vitro for cells in plasma or in an aggregating 70 kD dextran solution. Plasma viscosity and whole blood viscosity were also measured. Results During treatment, fasting glucose fell 27%, HbA(1c) fell 21%, and serum triglycerides and total cholesterol fell 28% and 12%, respectively (P < 0.0001 for each). The extent and strength of RBC aggregation in plasma fell by 10-13% (P < 0.002). Similar decreases of RBC aggregation were seen for cells suspended in dextran (P < 0.002). Plasma viscosity decreased by 3% (P < 0.02) and high shear blood viscosity by 6-7% (P < 0.0001). Changes of RBC aggregation in plasma and in dextran were significantly correlated, supporting a cellular rather than a plasmatic origin for these changes. However, there were no significant correlations between RBC aggregation changes and changes of fasting glucose, HbA(1c) , serum triglycerides, serum cholesterol, or plasma fibrinogen. Conclusions Intensified metabolic control results in a reduction of RBC aggregation that appears to be intrinsic to RBC. Since increased RBC aggregation can impair microcirculatory flow, it is possible that haemorheological factors may contribute to the reduction of microvascular complications resulting from improved metabolic control in T2DM MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0742-3071 UR - ISI:000182043200007 L2 - diabetes mellitus;red blood cell;aggregation;rheology;therapy;POLYMORPHONUCLEAR LEUKOCYTE DEFORMABILITY; ERYTHROCYTE DEFORMABILITY; MEMBRANE; INSULIN; FIBRINOGEN; RHEOLOGY; RAT; MICROCIRCULATION; AGGREGABILITY; VISCOSITY SO - Diabetic Medicine 2003 ;20(4):301-306 7720 UI - 6971 AU - Choudhry S AU - Lind DL AU - Salari K AU - Ung N AU - Coyle NE AU - Ziv E AU - Clark SL AU - Nazario S AU - Rodriguez-Santana JR AU - Salas J AU - Selman M AU - Boushey HA AU - Weiss ST AU - Chapela R AU - Ford JG AU - Rodriguez-Cintron W AU - Kwok P AU - Silverman EK AU - Sheppard D AU - Burchard EG AD - Univ Calif San Francisco, San Francisco, CA 94143, USAUniv Puerto Rico, San Juan, PR 00936, USACardiovasc Ctr San Juan, Pediat Pulm Program San Juan, San Juan, PR, USABrigham & Womens Hosp, Boston, MA 02115, USAInst Nacl Enfermedades Resp, Mexico City, DF, MexicoHarlem Hosp, Harlem Lung Ctr, New York, NY, USAColumbia Univ, New York, NY, USA TI - IL-13 gene sequence variants and haplotypes are associated with-asthma, bronchodilator responsiveness and asthma Severity in Mexicans and Puerto Ricans from the Genetics of Asthma in Latino Americans (GALA) study MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599700077 SO - American Journal of Human Genetics 2003 ;73(5):177-177 7721 UI - 7645 AU - Chowell G AU - Fenimore PW AU - Castillo-Garsow MA AU - Castillo-Chavez C AD - Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545, USACornell Univ, Dept Biol Stat & Computat Biol, Ithaca, NY 14853, USAUniv Colima, Fac Ciencias, Colima 28045, Colima, MexicoUniv Colima, Fac Letras, Colima 28045, Colima, MexicoChowell, G, Los Alamos Natl Lab, Ctr Nonlinear Studies, MS B258, Los Alamos, NM 87545 USA TI - SARS outbreaks in Ontario, Hong Kong and Singapore: the role of diagnosis and isolation as a control mechanism AB - In this article we use global and regional data from the SARS epidemic in conjunction with a model of susceptible, exposed, infective, diagnosed, and recovered classes of people ("SEIJR") to extract average properties and rate constants for those populations. The model is fitted to data from the Ontario (Toronto) in Canada, Hong Kong in China and Singapore outbreaks and predictions are made based on various assumptions and observations, including the current effect of isolating individuals diagnosed with SARS. The epidemic dynamics for Hong Kong and Singapore appear to be different from the dynamics in Toronto, Ontario. Toronto shows a very rapid increase in the number of cases between March 31st and April 6th, followed by a significant slowing in the number of new cases. We explain this as the result of an increase in the diagnostic rate and in the effectiveness of patient isolation after March 26th. Our best estimates are consistent with SARS eventually being contained in Toronto, although the time of containment is sensitive to the parameters in our model. It is shown that despite the empirically modeled heterogeneity in transmission, SARS' average reproductive number is 1.2, a value quite similar to that computed for some strains of influenza (J. Math. Biol. 27 (1989) 233). Although it would not be surprising to see levels of SARS infection higher than 10% in some regions of the world (if unchecked), lack of data and the observed heterogeneity and sensitivity of parameters prevent us from predicting the long-term impact of SARS. The possibility that 10 or more percent of the world population at risk could eventually be infected with the virus in conjunction with a mortality rate of 3-7% or more, and indications of significant improvement in Toronto support the stringent measures that have been taken to isolate diagnosed cases. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Colima MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 46 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000184849200001 L2 - SARS;SEIJR;outbreak;ACUTE RESPIRATORY SYNDROME; CORONAVIRUS SO - Journal of Theoretical Biology 2003 ;224(1):1-8 7722 UI - 7918 AU - Chrobak M AU - Epstein L AU - Noga J AU - Sgall J AU - van Stee R AU - Tichy T AU - Vakhania N AD - AS CR, Math Inst, CZ-11567 Prague 1, Czech RepublicUniv Calif Riverside, Dept Comp Sci, Riverside, CA 92521, USASch Comp Sci, Interdisciplinary Ctr, IL-46150 Herzliyya, IsraelCalif State Univ Northridge, Dept Comp Sci, Northridge, CA 91330, USAUniv Freiburg, Inst Informat, D-79110 Freiburg, GermanyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62251, Morelos, MexicoSgall, J, AS CR, Math Inst, Zitna 25, CZ-11567 Prague 1, Czech Republic TI - Preemptive scheduling in overloaded systems AB - The following scheduling problem is studied: We are given a set of tasks with release times, deadlines, and profit rates. The objective is to determine a I-processor preemptive schedule of the given tasks that maximizes the overall profit. In the standard model, each completed task brings profit, while non-completed tasks do not. In the metered model, a task brings profit proportional to the execution time even if not completed. For the metered task model, we present an efficient offline algorithm and improve both the lower and upper bounds on the competitive ratio of online algorithms. Furthermore, we prove three lower bound results concerning resource augmentation in both models. (C) 2003 Elsevier Science (USA). All rights reserved MH - Czech Republic MH - Germany MH - Israel MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Hardware & Architecture;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0022-0000 UR - ISI:000184240900008 L2 - scheduling;online algorithms;deadline;resource augmentation SO - Journal of Computer and System Sciences 2003 ;67(1):183-197 7723 UI - 6647 AU - Chu YH AU - Guerrero MA AU - Gruendl RA AU - Garcia-Segura G AU - Wendker HJ AD - Univ Illinois, Dept Astron, Urbana, IL 61801, USAUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoHamburger Sternwarte, D-21029 Hamburg, GermanyChu, YH, Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA TI - Hot gas in the circumstellar bubble S308 AB - S308 is a circumstellar bubble blown by the WN4 star HD 50896. It is one of the only two single-star bubbles that show detectable diffuse X-ray emission. We have obtained XMM-Newton EPIC observations of the northwest quadrant of S308. The diffuse X-ray emission shows a limb-brightened morphology, with a clear gap extending from the outer edge of the diffuse X-ray emission to the outer rim of the nebular shell. The X-ray spectrum of the diffuse emission is very soft and is well fitted by an optically thin plasma model for an N-enriched plasma at temperatures of similar to1.1 x 10(6) K. A hotter gas component may exist but its temperature is not well constrained since it contributes less than 6% of the observed X-ray flux. The total X-ray luminosity of S308, extrapolated from the bright northwest quadrant, is less than or equal to(1.2 +/- 0.5) x 10(34) ergs s(-1). We have used the observed bubble dynamics and the physical parameters of the hot interior gas of S308, in conjunction with the circumstellar bubble model of Garcia-Segura & Mac Low, to demonstrate that the X-ray-emitting gas must be dominated by mixed-in nebular material MH - Germany MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000187451500035 L2 - ISM : bubbles;ISM : individual (S308);stars : individual (HD 50896);stars : winds, outflows;stars : Wolf-Rayet;X-rays : individual (S308);X-RAY-EMISSION; BLOWN INTERSTELLAR BUBBLES; SELF-SIMILAR EVOLUTION; STAR HD-50896; RING NEBULAE; ENVIRONMENT; ABUNDANCES; SAMPLE; M17 SO - Astrophysical Journal 2003 ;599(2):1189-1195 7724 UI - 8539 AU - Churg A AU - Brauer M AU - vila-Casado MD AU - Fortoul TI AU - Wright JL AD - Univ British Columbia, Dept Pathol, Vancouver, BC V6T 2B5, CanadaUniv British Columbia, Sch Occupat & Environm Hyg, Vancouver, BC V6T 2B5, CanadaInt Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Dept Cellular & Tissular Biol, Mexico City 04510, DF, MexicoChurg, A, Univ British Columbia, Dept Pathol, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada TI - Chronic exposure to high levels of particulate air pollution and small airway remodeling AB - Recent evidence suggests that chronic exposure to high levels of ambient particulate matter (PM) is associated with decreased pulmonary function and the development of chronic airflow obstruction. To investigate the possible role of PM-induced abnormalities in the small airways in these functional changes, we examined histologic sections from the lungs of 20 women from Mexico City, a high PM locale. All subjects were lifelong residents of Mexico City, were never-smokers, never had occupational dust exposure, and never used biomass fuel for cooking. Twenty never smoking, non-dust-exposed subjects from Vancouver, British Columbia, Canada, a low PM region, were used as a control. By light microscopy, abnormal small airways with fibrotic walls and excess muscle, many containing visible dust, were present in the Mexico City lungs. Formal grading analysis confirmed the presence of significantly greater amounts of fibrous tissue and muscle in the walls of the airways in the Mexico City compared with the Vancouver lungs. Electron microscopic particle burden measurements on four cases from Mexico City showed that carbonaceous aggregates of ultrafine particles, aggregates likely to be combustion products, were present in the airway mucosa. We conclude that PM penetrates into and is retained in the walls of small airways, and that, even in nonsmokers, long-term exposure to high levels of ambient particulate pollutants is associated with small airway remodeling. This process may produce chronic airflow obstruction MH - Canada MH - Mexico|Distrito Federal PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 29 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000182788400028 L2 - air pollution;chronic obstructive pulmonary disease;COPD;small airways disease;TERM AMBIENT CONCENTRATIONS; LUNG-CANCER; POLLUTANTS; PARTICLES; DISEASE; NONSMOKERS; COMBUSTION; MORTALITY; MATTER; HEALTH SO - Environmental Health Perspectives 2003 ;111(5):714-718 7725 UI - 5861 AU - Cisneros MM AU - Lopez H AU - Salas N AU - Valdes JV AU - Cisneros MA AU - Figueroa U AD - Inst Tecnol Saltillo, Saltillo 25280, Coahuila, Mexico. Univ Wisconsin, Dept Mat Engn, Milwaukee, WI 53201, USA. IETSM, Atizapan 52926, Mexico TI - Hydrogen permeability in a plasma nitrided API X52 steel AB - A number of properties in steel components are detrimentally influenced when exposed to hydrogen environments. Under these conditions, atomic hydrogen is adsorbed on the steel surface, then absorbed and preferentially transported towards tri-dimensional stressed regions in the crystal lattice and into defects such as interfaces or dislocations. The hydrogen embrittlement susceptibility is strongly influenced by various microstructural parameters including the type of inclusions, steel composition and heat treating conditions. One of the alternatives employed in minimizing hydrogen embrittlement is the use of surface barriers for hydrogen permeation. In particular, the presence of surface nitride layers in steels can be considered as an effective barrier. Nitride steel surface layers can be produced by plasma nitriding with the concomitant benefits of improved surface hardness, as well as superior wear and fatigue resistance. Accordingly, in this work, the role of surface nitriding on the exhibited hydrogen permeability was investigated. For this purpose, an API X52 steel was subjected to plasma nitriding to promote the development of surface nitride layers. The surface layer produced was found to consist of a continuous gamma'-Fe4N compound, with a layer of residual austenite and a diffusion zone beneath gamma'. Electrochemical measurements performed in these steels indicated that the hydrogen permeability was significantly reduced in the steel that contained the surface nitride layers. Apparently, the presence of multiple interfaces developed by plasma nitriding and the development of a continuous iron nitride layer play a strong role as effective hydrogen barriers. In particular, a determination of the effective diffusion coefficients D-eff (m(2)s(-1)) in nitrided and non-nitrided API X52 steels indicated that the presence of nitride layers on the steel surface lead to a reduction in hydrogen diffusivity D-eff = 9.41x10(-12) (m(2)s(-1)) when compared with the one corresponding to the non-nitrided steel D,, = 4.32x10(-11) (m(2)s(-1)) MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA T3 - ADVANCED STRUCTURAL MATERIALSMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle0BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBY71B AV - English IS - 0255-5476 UR - ISI:000189444600013 L2 - API x52 steel;electrochemical testing;hydrogen permeability;plasma nitriding;surface nitrides SO - 2003 ;():85-90 7726 UI - 6611 AU - Claeys P AU - Heuschkel S AU - Lounejeva-Baturina E AU - Sanchez-Rubio G AU - Stoffler D AD - Free Univ Brussels, Dept Geol, B-1050 Brussels, BelgiumZERIN, Ctr Ries Crater & Impact Res, D-86720 Nordlingen, GermanyNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoHumboldt Univ, Museum Nat Kunde, Inst Mineral, D-10099 Berlin, GermanyClaeys, P, Free Univ Brussels, Dept Geol, Pl Laan 2, B-1050 Brussels, Belgium TI - The suevite of drill hole Yucatan 6 in the Chicxulub impact crater AB - The suevite breccia of the Chicxulub impact crater, Yucatan, Mexico, is more variable and complex in terms of composition and stratigraphy than suevites observed at other craters. Detailed studies (microscope, electron microprobe, SEM, XRF) have been carried out on a noncontinuous set of samples from the drill hole Yucatan 6 (Y6) located 50 km SW from the center of the impact structure. Three subunits can be distinguished in the suevite: the upper unit is a fine-grained carbonate-rich suevite breccia with few shocked basement clasts, mostly altered melt fragments, and formerly melted carbonate material; the middle suevite is a coarse-grained suevite with shocked basement clasts and altered silicate melt fragments; the lower suevite unit is composed of shocked basement and melt fragments and large evaporite clasts. The matrix of the suevite is not clastic but recrystallized and composed mainly of feldspar and pyroxene. The composition of the upper members of the suevite is dominated by the sedimentary cover of the Yucatan target rock. With depth in well Y6, the amount of carbonate decreases and the proportion of evaporite and silicate basement rocks increases significantly. Even at the thin section scale, melt phases of different chemistry can be identified, showing that no widespread homogenization of the melt took place. The melt compositions also reflect the heterogeneity of the deep Yucatan basement. Calcite with characteristic feathery texture indicates the existence of formerly pure carbonate melt. The proportion of carbonate to evaporite clasts is less than 5: 1, except in the lower suevite where large evaporite clasts are present. This proportion constrains the amount of CO2 and SOx released by the impact event MH - Belgium MH - Germany MH - Mexico|Distrito Federal PB - FAYETTEVILLE: METEORITICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1086-9379 UR - ISI:000187456700001 L2 - CRETACEOUS-TERTIARY BOUNDARY; LIQUID IMMISCIBILITY; K/T IMPACT; MELT ROCK; ORIGIN; HAITI; GLASSES; MEXICO; SPHERULES; MAGMAS SO - Meteoritics & Planetary Science 2003 ;38(9):1299-1317 7727 UI - 9009 AU - Clapham PJ AU - Berggren P AU - Childerhouse S AU - Friday NA AU - Kasuya T AU - Kell L AU - Kock KH AU - Manzanilla-Naim S AU - Di Sciara GN AU - Perrin WF AU - Read AJ AU - Reeves RR AU - Rogan E AU - Rojas-Bracho L AU - Smith TD AU - Stachowitsch M AU - Taylor BL AU - Thiele D AU - Wade PR AU - Brownell RL AD - NE Fisheries Sci Ctr, Woods Hole, MA 02543, USAUniv Stockholm, Dept Zool, S-10691 Stockholm, SwedenSci & Res Unit, Dept Conservat, Wellington, New ZealandNatl Marine Mammal Lab, Seattle, WA 98115, USATeikyo Univ Sci & Technol, Yamanashi 4090193, JapanCEFAS Lowestoft Lab, Lowestoft NR33 HT, Suffolk, EnglandInst Sea Fisheries, Fed Res Ctr Fisheries, Hamburg, GermanyIst Cent Ric Applicata Mare, Giuseppe Notabarolo Sciara, I-00166 Rome, ItalySW Fisheries Sci Ctr, La Jolla, CA 92037, USADuke Univ, Marine Lab, Beaufort, NC 28516, USAUniv Coll, Dept Zool & Anim Ecol, Cork, IrelandCICESE, Inst Nacl Ecol, Ensenada 22860, Baja California, MexicoUniv Vienna, Dept Marine Biol, Inst Ecol & Conservat Biol, A-1090 Vienna, AustriaDeakin Univ, Sch Ecol & Environm, Warrnambool, Vic 3280, AustraliaNatl Marine Mammal Lab, Seattle, WA 98115, USASW Fisheries Sci Ctr, Pacific Grove, CA 93950, USAClapham, PJ, NE Fisheries Sci Ctr, 166 Water St, Woods Hole, MA 02543 USA TI - Whaling as science MH - Australia MH - Austria MH - United Kingdom MH - Germany MH - Ireland MH - Italy MH - Japan MH - Mexico|Baja California MH - New Zealand MH - Sweden MH - USA PB - WASHINGTON: AMER INST BIOLOGICAL SCI RP - NOT IN FILE U3 - TC 6 U4 - Biology U5 - J;Editorial Material AV - English IS - 0006-3568 UR - ISI:000181433200010 L2 - WHALES SO - Bioscience 2003 ;53(3):210-212 7728 UI - 8422 AU - Clapp M AU - Squassina M AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Cattolica Sacro Cuore, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyClapp, M, Natl Autonomous Univ Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Nonhomogeneous polyharmonic elliptic problems at critical growth with symmetric data AB - We show the existence of multiple solutions of a perturbed polyharmonic elliptic problem at critical growth with Dirichlet boundary conditions when the domain and the nonhomogenous term axe invariant with respect to some group of symmetries MH - Italy MH - Mexico|Distrito Federal PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1534-0392 UR - ISI:000182980800004 L2 - polyharmonic problems;symmetric domains;multiplicity of solutions;CRITICAL SOBOLEV EXPONENT; CRITICAL DIMENSIONS; EQUATIONS; OPERATORS SO - Communications on Pure and Applied Analysis 2003 ;2(2):171-186 7729 UI - 8636 AU - Clapp M AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Versailles, Lab Math Appl, F-78035 Versailles, FranceUniv Milan, Dipartimento Matemat, I-20133 Milan, ItalyClapp, M, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Multiple solutions of nonhomogeneous elliptic equations with critical nonlinearity on symmetric domains AB - We consider the Dirichlet problem associated to the nonhomogenous elliptic equation -Deltau = \u\(2*-2)u + f with critical exponent on a symmetric domain, and study the impact of symmetries on it. We show that a rich symmetry structure will give rise, in some cases, to many solutions MH - France MH - Italy MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0219-1997 UR - ISI:000182453000001 L2 - elliptic equation;critical growth;symmetry;group invariance;multiple solutions;POSITIVE SOLUTIONS; EXPONENT SO - Communications in Contemporary Mathematics 2003 ;5(2):147-169 7730 UI - 6500 AU - Clark P AU - Lavielle P AU - Salmeron J AU - Cummings SR AD - UNAM, Ctr Med Nacl, IMSS, Fac Med,Clin Epidemiol Unit, Mexico City, DF, MexicoSF Coordinating Ctr, San Francisco, CA, USA TI - Incident rates of hip fractures in Mexicans over 50 years MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000186080500597 SO - Journal of Bone and Mineral Research 2003 ;18():S153-S153 7731 UI - 6501 AU - Clark P AU - Deleze M AU - Cons-Molina R AU - Salmeron J AU - Palermo L AU - Cummings SR AD - UNAM, IMSS Fac Med, Ctr Med Nacl, Clin Epidemiol Unit, Mexico City, DF, MexicoClin Osteoporosis, Puebla, MexicoUnidad Diagnost Osteoporosis, Mexicali, Baja California, MexicoSF Coordinating Ctr, San Francisco, CA, USAIMSS, Ctr Med Nacl, Clin Epidemiol Unit, Mexico City, DF, Mexico TI - Prevalence of vertebral fractures in Mexico: A population-based study MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000186080500975 SO - Journal of Bone and Mineral Research 2003 ;18():S244-S244 7732 UI - 6502 AU - Clark P AU - Talavera J AU - Palermo L AU - Cummings SR AD - UNAM, IMSS Fac Med, Ctr Med Nacl, Clin Epidemiol Unit, Mexico City, DF, MexicoIMSS, Ctr Med Nacl, Clin Epidemiol Unit, Mexico City, DF, MexicoSF Coordinating Ctr, San Francisco, CA, USA TI - Simple indices on plain x-rays strongly predict risk of hip fractures in Mexican men and women MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000186080501283 SO - Journal of Bone and Mineral Research 2003 ;18():S319-S319 7733 UI - 8306 AU - Clarkson CA AU - Coley AA AU - O'Neill ESD AU - Sussman RA AU - Barrett RK AD - Dalhousie Univ, Dept Math & Stat, Halifax, NS B3H 3J5, CanadaUniv Cape Town, Relativ & Cosmol Grp, Dept Math & Appl Math, ZA-7701 Cape Town, South AfricaUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Glasgow, Dept Phys & Astron, Astron & Astrophys Grp, Glasgow G12 8QQ, Lanark, ScotlandClarkson, CA, Dalhousie Univ, Dept Math & Stat, Halifax, NS B3H 3J5, Canada TI - Inhomogeneous cosmologies, the Copernican principle and the cosmic microwave background: More on the EGS theorem AB - We discuss inhomogeneous cosmological models which satisfy the Copernican principle. We construct some inhomogeneous cosmological models starting from the ansatz that the all the observers in the models view an isotropic cosmic microwave background. We discuss multi-fluid models, and illustrate how more general inhomogeneous models may be derived, both in General Relativity and in scalar-tensor theories of gravity. Thus we illustrate that the cosmological principle, the assumption that the Universe we live in is spatially homogeneous, does not necessarily follow from the Copernican principle and the high isotropy of the cosmic microwave background. We also present some new conformally flat two-fluid solutions of Einstein's field equations MH - Canada MH - Mexico|Distrito Federal MH - United Kingdom MH - South Africa PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000183252200001 L2 - cosmology;Copernican principle;Einstein field equation;EINSTEIN-BOLTZMANN EQUATIONS; SCALAR-TENSOR COSMOLOGIES; SHEAR-FREE; ANISOTROPIC SOLUTIONS; RADIATION; UNIVERSE; LIMITS; TIMES SO - General Relativity and Gravitation 2003 ;35(6):969-990 7734 UI - 6674 AU - Clatza A AU - Bonifaz LC AU - Vignali DAA AU - Moreno J AD - Ctr Med Nacl Siglo XXI, Res Unit Autoimmune Dis, Inst Mexico Seguro Social, Mexico City 06703, DF, MexicoSt Jude Childrens Hosp, Dept Immunol, Memphis, TN 38105, USAMoreno, J, Ctr Med Nacl Siglo XXI, Res Unit Autoimmune Dis, Inst Mexico Seguro Social, Apartado Postal A 047,Coahuila 5 Col Roma, Mexico City 06703, DF, Mexico TI - CD40-induced aggregation of MHC class II and CD80 on the cell surface leads to an early enhancement in antigen presentation AB - Ligation of CD40 on B cells increases their ability to present Ag and to activate MHC class II (MHC-II)-restricted T cells. How this occurs is not entirely clear. In this study we demonstrate that CD40 ligation on Ag-presenting B cells (APC) for a short period between 30 min and 3 h has a rapid, augmenting effect on the ability of a B cell line and normal B cells to activate T cells. This is not due to alterations in Ag processing or to an increase in surface expression of CD80, CD86, ICAM-1, or MHC-II. This effect is particularly evident with naive, resting T lymphocytes and appears to be more pronounced under limiting Ag concentrations. Shortly after CD40 ligation on a B cell line, MHC-II and CD80 progressively accumulated in cholesterol-enriched microdomains on the cell surface, which correlated with an initial enhancement in their Ag presentation ability. Moreover, CD40 ligation induced a second, late, more sustained enhancement of Ag presentation, which correlates with a significant increase in CD80 expression by APC. Thus, CD40 signaling enhances the efficiency with which APC activate T cells by at least two related, but distinct, mechanisms: an early stage characterized by aggregation of MHC-II and CD80 clusters, and a late stage in which a significant increase in CD80 expression is observed. These results raise the possibility that one important role of CD40 is to contribute to the formation of the immunological synapse on the APC side MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 13 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000187227700025 L2 - CD4(+) T-CELLS; CD40 LIGAND; B-CELLS; DENDRITIC CELLS; GENE-EXPRESSION; LIPID RAFTS; IN-VIVO; CUTTING EDGE; ACTIVATION; LYMPHOCYTES SO - Journal of Immunology 2003 ;171(12):6478-6487 7735 UI - 7881 AU - Cleaveland MK AU - Stahle DW AU - Therrell MD AU - Villanueva-Diaz J AU - Burns BT AD - Univ Arkansas, Dept Geosci, Tree Ring Lab, Fayetteville, AR 72701, USAINIFAP, San Luis Potosi 78270, SLP, MexicoNative Seed Search, Tucson, AZ 85705, USACleaveland, MK, Univ Arkansas, Dept Geosci, Tree Ring Lab, Fayetteville, AR 72701 USA TI - Tree-ring reconstructed winter precipitation and tropical teleconnections in Durango, Mexico AB - Earlywood width chronologies from Douglas-fir tree rings were used to reconstruct winter ( November - March) precipitation for more than 600 years over Durango, Mexico. The tree-ring data were obtained from two sites of long-lived Douglas-fir in northern and southern Durango and the seasonal climatic precipitation data were regionally averaged from five weather stations well distributed across the state. The averaged earlywood chronology accounted for 56% of the variance in instrumental November - March precipitation 1942 - 1983. We validated the reconstruction against independent precipitation records. The worst winter drought of the 20th century in Durango occurred 1950 - 1965. However, the reconstruction indicates droughts more severe than any witnessed in the 20th century, e. g., the 1850s - 1860s, and the megadrought in the mid- to late-16th century. Reconstructed winter precipitation 1540 - 1579 shows 33 of 40 years were dry. Persistent drought may be linked to extended La Nina episodes. The Tropical Rainfall Index (TRI) correlates well with instrumental and reconstructed winter precipitation (r = 0.49 and 0.55, respectively), reflecting the strong ENSO modulation of cool season climate over northern Mexico. The ENSO teleconnection varies through time, with TRI-reconstructed precipitation correlations ranging from 0.78 to 0.27 in five periods 1895 - 1993. The 1942 - 1983 winter observed and reconstructed Durango data correlate well with the corresponding seasonalization of the All-Mexico Rainfall Index (AMRI; r = 0.68, P < 0.0001 and r = 0.70, P < 0.001, respectively), indicating that both the observed and the reconstructed precipitation often reflect broad-scale precipitation anomalies across Mexico. New long Douglas-fir and baldcypress tree-ring chronologies are now available for central and southern Mexico near major population centers, allowing the exploration of relationships between drought, food scarcity, and social and political upheaval in Mexican history MH - USA MH - Mexico|San Luis Potosi PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 17 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0165-0009 UR - ISI:000184319800005 L2 - WESTERN NORTH-AMERICA; SOUTHERN OSCILLATION; CLIMATE VARIABILITY; PACIFIC; CORAL SO - Climatic Change 2003 ;59(3):369-388 7736 UI - 8641 AU - Cogni R AU - Fernandes GW AU - Vieira DLM AU - Marinelli CE AU - Jurinitz CF AU - Guerra BR AU - Zuanon J AU - Venticinque EM AD - Univ Estadual Campinas, Inst Biol, Dept Zool, BR-13083970 Campinas, SP, BrazilUniv Fed Minas Gerais, ICB, Ecol Evolut Herbivoros Trop DBG, BR-30161970 Belo Horizonte, MG, BrazilUniv Brasilia, Dept Ecol, BR-70910900 Brasilia, DF, BrazilUniv Sao Paulo, Ctr Recursos Hidr & Ecol Aplicada, BR-05302010 Sao Paulo, BrazilUniv Fed Rio Grande Sul, Inst Biociencias, Dept Bot, Programa Posgrad Bot, BR-91501970 Porto Alegre, RS, BrazilUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoINPA, Coordenacao Pesquisas Biol Aquat, BR-69083970 Manaus, Amazonas, BrazilINPA, Projeto Dinam Biol Fragmentos Florestais, BR-69011970 Manaus, Amazonas, BrazilCogni, R, Univ Estadual Campinas, Inst Biol, Dept Zool, CP 6109, BR-13083970 Campinas, SP, Brazil TI - Galling insects (Diptera : Cecidomyiidae) survive inundation during host plant flooding in Central Amazonia AB - The effect of host plant inundation on survivorship of Symmeria paniculata's galling herbivores was investigated in Central Amazonian floodplain forest. The majority of submerged galls were alive (62% of morphospecies 1 and 70% of morphospecies 2). Survivorship was similar between submerged leaves and new leaves that were never submerged. Some submerged galls were eaten by fish. To the best of our knowledge, this is the first report of galling insect survivorship under severe flooding MH - Brazil MH - Mexico|Distrito Federal PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000182530700013 L2 - SPECIES RICHNESS; HABITAT; FOREST SO - Biotropica 2003 ;35(1):115-119 7737 UI - 8253 AU - Cohen DC AU - Cohen FR AU - Xicotencatl M AD - Louisiana State Univ, Dept Math, Baton Rouge, LA 70803, USAUniv Rochester, Dept Math, Rochester, NY 14627, USAIPN, Dept Matemat, CINVESTAV, Mexico City 07738, DF, MexicoCohen, DC, Louisiana State Univ, Dept Math, Baton Rouge, LA 70803, USA TI - Lie algebras associated to fiber-type arrangements MH - Mexico|Distrito Federal MH - USA PB - CAYAHOGA FALLS: HINDAWI PUBLISHING CORPORATION RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 1073-7928 UR - ISI:000183408100002 L2 - ORBIT CONFIGURATION-SPACES; COMPLEMENT; SERIES SO - International Mathematics Research Notices 2003 ;(29):1591-1621 7738 UI - 6948 AU - Coll P AU - Bernard JM AU - Navarro-Gonzalez R AU - Raulin F AD - Univ Paris 12, Univ Paris 07,CMC, CNRS,UMR 7583, Lab Interuniv Syst Astmospher, F-94010 Creteil, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoColl, P, Univ Paris 12, Univ Paris 07,CMC, CNRS,UMR 7583, Lab Interuniv Syst Astmospher, 61 Ave Gen de Gaulle, F-94010 Creteil, France TI - Oxirane: An exotic oxygenated organic compound on Titan? AB - After the discovery of CO, CO2, and more recently H2O in Titan's atmosphere, the chemistry of oxygenated organic compounds in this environment has been limited to theoretical studies only. Both kinetic and thermochemical models predict the formation of methanol and formaldehyde as the main O-organic products. Here we show that oxirane ( also named ethylene oxide) is the main product in experiments designed to simulate the upper atmosphere of Titan; methanol and formaldehyde are not produced in detectable amounts. Oxirane has been previously detected in the interstellar medium and hot molecular cloud cores. The first opportunity to detect it in Titan will occur in 2005 January during the entry of the Huygens probe into the satellite's atmosphere. Therefore, oxirane becomes a molecule of wide astrophysical interest MH - France MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186688700060 L2 - astrochemistry;ISM : individual (Sagittarius B2(N));ISM : molecules;methods : laboratory;planets and satellites : individual (Titan);MIXED VERTICAL PROFILE; COMET HALE-BOPP; CARBON-MONOXIDE; ETHYLENE-OXIDE; HETERODYNE OBSERVATIONS; ATMOSPHERE; CO; STRATOSPHERE; MILLIMETER; ABUNDANCE SO - Astrophysical Journal 2003 ;598(1):700-703 7739 UI - 8807 AU - Colley WN AU - Schild RE AU - Abajas C AU - Alcalde D AU - Aslan Z AU - Bikmaev I AU - Chavushyan V AU - Chinarro L AU - Cournoyer JP AU - Crowe R AU - Dudinov V AU - Evans AKD AU - Jeon YB AU - Goicoechea LJ AU - Golbasi O AU - Khamitov I AU - Kjernsmo K AU - Lee HJ AU - Lee J AU - Lee KW AU - Lee MG AU - Lopez-Cruz O AU - Mediavilla E AU - Moffat AFJ AU - Mujica R AU - Ullan A AU - Munoz J AU - Oscoz A AU - Park MG AU - Purves N AU - Saanum O AU - Sakhibullin N AU - Serra-Ricart M AU - Sinelnikov I AU - Stabell R AU - Stockton A AU - Teuber J AU - Thompson R AU - Woo HS AU - Zheleznyak A AD - Univ Virginia, Dept Astron, Charlottesville, VA 22903, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAInst Astrofis Canarias, E-38200 Tenerife, Canary Isl, SpainAkdeniz Univ, Dept Phys, TR-07058 Antalya, TurkeyTubitak Natl Observ, TR-07058 Antalya, TurkeyKazan VI Lenin State Univ, Kazan 420008, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaObserv Mont Megant, Montreal, PQ, CanadaUniv Hawaii, Hilo, HI 96720, USAKharkov Natl Univ, Astron Observ, UA-61022 Kharkov, UkraineUniv Oslo, Inst Theoret Astrophys, N-0315 Oslo, NorwaySeoul Natl Univ, Astron Program, SEES, Seoul 151742, South KoreaUniv Cantabria, Dept Fis Moderna, E-39005 Santander, SpainDACOM Corp, Internet Technol Div, Seoul 135610, South KoreaUniv Coll London, London WC1E 6BT, EnglandUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoObserv Carnegie Inst Washington, Washington, DC 20005, USAKyungpook Natl Univ, Taegu 702701, South KoreaDanish Lib Nat & Med Sci, DK-2200 Copenhagen, DenmarkColley, WN, Univ Virginia, Dept Astron, POB 3818, Charlottesville, VA 22903 USA TI - Around-the-clock observations of the Q0957+561A,B gravitationally lensed quasar. II. Results for the second observing season AB - We report on an observing campaign in 2001 March to monitor the brightness of the later arriving Q0957+ 561B image in order to compare with the previously published brightness observations of the (first-arriving) A image. The 12 participating observatories provided 3543 image frames, which we have analyzed for brightness fluctuations. From our classical methods for time-delay determination, we find a 417.09 +/- 0.07 day time delay, which should be free of effects due to incomplete sampling. During the campaign period, the quasar brightness was relatively constant and only small fluctuations were found; we compare the structure function for the new data with structure function estimates for the 1995-1996 epoch and show that the structure function during our observing interval is unusually depressed. We also examine the data for any evidence of correlated fluctuations at zero lag. We discuss the limits of our ability to measure the cosmological time delay if the quasar's emitting surface is time resolved, as seems likely MH - USA MH - Canada MH - Denmark MH - United Kingdom MH - Mexico|Guanajuato MH - Mexico|Puebla MH - Norway MH - Russia MH - South Korea MH - Spain MH - Turkey MH - Ukraine PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000182105600006 L2 - gravitational lensing;quasars : individual (Q0957+561A,B);TIME-DELAY; MICROLENSING VARIABILITY; LIGHT-CURVE; QSO-0957+561; PARAMETERS; 0957+561A; A,B SO - Astrophysical Journal 2003 ;587(1):71-79 7740 UI - 7672 AU - Comett-Ambriz I AU - Gonzalez-Martinez S AU - Wilderer P AD - Tech Univ Munich, Inst Water Qual Control & Waste Mangement, D-85748 Garching, GermanyNatl Autonomous Univ Mexico, Dept Environm Engn, Inst Engn, Mexico City 04510, DF, MexicoComett-Ambriz, I, Tech Univ Munich, Inst Water Qual Control & Waste Mangement, D-85748 Garching, Germany TI - Comparison of the performance of MBBR and SBR systems for the treatment of anaerobic reactor biowaste effluent AB - Anaerobic reactor biowaste effluent was treated with biofilm and activated sludge sequencing batch reactors to compare the performance of both systems. The treatment targets were organic carbon removal and nitrification. The pilot plant was operated in two phases. During the first phase, it was operated like a Moving Bed Biofilm Reactor (MBBR) with the Natrix media, with a specific surface area of 210 m(2)/m(3). The MBBR was operated under Sequencing Batch Reactor (SBR) modality with three 8-hour cycles per day over 70 days. During the second phase of the experiment, the pilot plant was operated over 79 days as a SBR. In both phases the influent was fed to the reactor at a flow rate corresponding to a Hydraulic Retention Time (HRT) of 4 days. Both systems presented a good carbon removal for this specific wastewater. The Chemical Oxygen Demand (COD) total removal was 53% for MBBR and 55% for SBR. MBBR offered a higher dissolved COD removal (40%) than SBR (30%). The limited COD removal achieved is in agreement with the high COD to BOD5 ratio (1/3) of the influent wastewater. In both systems a complete nitrification was obtained. The different efficiencies in both systems are related to the different biomass concentrations MH - Germany MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000184651000021 L2 - carbon removal;moving bed biofilm reactor (MBBR);nitrification;sequencing batch reactor (SBR);solid waste fermentation;WASTE-WATER SO - Water Science and Technology 2003 ;47(12):155-161 7741 UI - 8276 AU - Condes-Lara M AU - Gonzalez NM AU - Martinez-Lorenzana G AU - Delgado OL AU - Freund-Mercier MJ AD - Univ Nacl Autonoma Mexico, Dept Neurofisiol, Ist Neurobiol, Juriquilla, Queretaro, MexicoInst Nacl Psiquiatria, Mexico City, DF, MexicoUniv Strasbourg 1, CNRS, Lab Neurophysiol Cellulaire & Integre 7519, Strasbourg, FranceCondes-Lara, M, Univ Nacl Autonoma Mexico, Dept Neurofisiol, Ist Neurobiol, Juriquilla, Queretaro, Mexico TI - Actions of oxytocin and interactions with glutamate on spontaneous and evoked dorsal spinal cord neuronal activities AB - Among the numerous pain control mechanisms that have been proposed, those acting at the spinal cord have been broadly studied, but little is known about how neuropeptides originating in supraspinal structures may relate to pain and analgesic mechanisms. Oxytocin (OT), in addition to its well known hormonal action, produces neuronal effects in various regions of the central nervous system. Indeed, some parvocellular neurons in the hypothalamic paraventricular nucleus (PVN) are oxytocinergic and project to the caudal part of the brain and the spinal cord. Moreover. the rat spinal cord shows a good overlap between the oxytocinergic hypothalamo-spinal neuron projections and the distribution of OT binding sites. However, the physiological significance of these binding sites is largely unknown. Extracellular unit activity of spinal cord neurons was recorded at the T13-L1 levels in male rats anesthetized with halotane. Somatic stimulation was applied to the inner and outer thigh of the ipsilateral hindpaw, and glutamate (GLU) and OT were locally delivered by pressure using pipettes coupled to recording electrodes. Our results show that spinal cord neurons, mainly located in the dorsal horn, in the intermediolateral cell column (IML) and in the intermediomedial gray matter (IMM), respond to the application of OT (71.5%) with activation (48%) or inhibition (52%). In some cases, opposite OT effects were observed during simultaneous recordings of two cells, suggesting OT activation of an inhibitory interneuron followed by the inhibition of the second recorded neuron. Increases in neuronal firing rate produced by GLU could be blocked by prior OT application. Finally, OT could reduce or partially block the responses to tactile and nociceptive somatic stimulation. We found that spinal cord neurons are sensitive to OT indicating that OT binding sites are functionally active. OT effects suggest the activation of inhibitory interneurons acting on a second order projecting cells to modulate afferent tactile and nociceptive information. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000183395800009 L2 - pain and analgesia;sensorial modulation;synaptic transmission and excitability;oxytocin;SPINOHYPOTHALAMIC TRACT NEURONS; SYMPATHETIC PREGANGLIONIC NEURONS; ANTIDROMICALLY IDENTIFIED AXONS; CERVICAL ENLARGEMENT; PARAVENTRICULAR NUCLEUS; BINDING SITES; HORN NEURONS; BRAIN-STEM; IN-VITRO; RAT SO - Brain Research 2003 ;976(1):75-81 7742 UI - 7895 AU - Contla PA AU - Stojmenovic M AD - Univ Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 01000, DF, MexicoUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaContla, PA, Univ Nacl Autonoma Mexico, IIMAS, DISCA, Apdo Postal 20-726,Admon 20, Mexico City 01000, DF, Mexico TI - Estimating hop counts in position based routing schemes for ad hoc networks AB - The recent availability of small, inexpensive low power GPS receivers and techniques for finding relative coordinates based on signal strengths, and the need for the design of power efficient and scalable networks. provided justification for applying position based routing methods in ad hoc networks. A number of such algorithms were developed recently. They are all based on three greedy schemes, applied when the forwarding node is able to advance the message toward destination. In this paper we show that the hop count, that is the number of transmissions needed to route a message from a source node to a destination node can be estimated reasonably accurately (in random unit graphs with uniform traffic), with less than 10%, 5% and 7% error for directional (compass), distance (greedy) and progress (MFR) based schemes, respectively, for 100 nodes with average degrees between 5 and 14, without experiments. Our results are derived from statistical observations regarding expected position of forwarding neighbor MH - Canada MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Telecommunications U5 - J;Article AV - English IS - 1018-4864 UR - ISI:000184237400007 L2 - ad hoc networks;routing;GPS;greedy algorithms;WIRELESS NETWORKS/; GUARANTEED DELIVERY SO - Telecommunication Systems 2003 ;22(1-4):109-118 7743 UI - 7602 AU - Contreras-Rodriguez A AU - Ramirez-Zavala B AU - Contreras A AU - Schurig GG AU - Sriranganathan N AU - Lopez-Merino A AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 06400, DF, MexicoVirginia Maryland Reg Coll Vet Med, Ctr Mol Med & Infect Dis, Blacksburg, VA 24061, USALopez-Merino, A, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Apartado Postal CON 174, Mexico City 06400, DF, Mexico TI - Purification and characterization of an immunogenic aminopeptidase of Brucella melitensis AB - An immunogenic aminopeptidase was purified from Brucella melitensis strain VTRM1. The purification procedure consisted of ammonium sulfate fractionation and three chromatographic steps. This procedure resulted in a yield of 29% and a 144-fold increase in specific activity. The aminopeptidase appeared to be a monomeric enzyme with a molecular mass of 96 kDa and an isoelectric point of 4.8. Its activity was optimal at pH 7.0 at 40degreesC. The enzyme was strongly inhibited by EDTA, 1,10-phenathroline, and divalent cations (Zn2+ and Hg2+), suggesting that this protein was a metalloaminopeptidase. The enzyme showed preference for alanine at the N termini of aminoacyl derivatives. The K-m values for L-alanine-p-nitroanilide (Ala-pNA) and Lys-pNA were 0.35 and 0.18 mM, respectively. The N-terminal sequence of aminopeptidase was used for a homologous search in the genomes of B. melitensis 16M and Brucella suis 1330. The analysis revealed an exact match of the probe sequence (36 bp) with an open reading frame of 2,652 bp encoding a protein predicted to be alanyl aminopeptidase (aminopeptidase N). Collectively, these data suggest designation of the B. melitensis enzyme as an aminopeptidase. N. The aminopeptidase was recognized by sera from patients with acute and chronic brucellosis, suggesting that the enzyme may have important diagnostic implications MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000184996600049 L2 - STRESS-RESPONSE PROTEASE; LACTOCOCCUS-LACTIS; ESCHERICHIA-COLI; BALB/C MICE; ABORTUS; PEPTIDASE; PROTEINS; SEQUENCE; ENZYME; SUIS SO - Infection and Immunity 2003 ;71(9):5238-5244 7744 UI - 8491 AU - Contreras A AU - Leon CA AU - Drew RAL AU - Bedolla E AD - Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoUniv Michoacana, Inst Invest Met, Morelia 58240, Michoacan, MexicoMcGill Univ, Dept Mining Met & Mat Engn, Montreal, PQ H3A 2B2, CanadaContreras, A, Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas 152 Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Wettability and spreading kinetics of Al and Mg on TiC AB - The wetting of TiC by liquid aluminum and magnesium under static argon between 800 and 1000 degreesC is studied using the sessile drop technique. Extensive interfacial reaction occurs between Al and TiC, leading to the formation of aluminum carbide; conversely no reaction occurs for Mg/TiC. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000182779200010 L2 - wetting;spreading;contact angle;reactive wetting;interface;MATRIX COMPOSITES; MOLTEN ALUMINUM; METALS; ALLOYS; AL4C3 SO - Scripta Materialia 2003 ;48(12):1625-1630 7745 UI - 7559 AU - Contreras AA AU - Rowe JE AU - Stephens CR AD - UNAM, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, MexicoUniv Birmingham, Sch Comp Sci, Birmingham B15 2TT, W Midlands, EnglandUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoContreras, AA, UNAM, Inst Invest Matemat Aplicadas & Sistemas, Circuito Escolar,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Coarse-graining in genetic algorithms: Some issues and examples AB - Following the work of Stephens and coworkers on the coarse-grained,dynamics of genetic systems, we work towards a possible generalisation in the context of genetic algorithms, giving as examples schemata, genotype-phenotype mappings, and error classes in the Eigen model. We discuss how the dynamics transforms under a coarse-graining, comparing and contrasting different notions of invariance. We work out some examples in the two-bit case, to illustrate the ideas and issues. We then find a bound for the Selection Weighted Linkage Disequilibriurn Coefficient for the two-bit onemax problem MH - United Kingdom MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000185074200100 SO - Genetic and Evolutionary Computation - Gecco 2003, Pt I, Proceedings 2003 ;2723():874-885 7746 UI - 6931 AU - Contreras G AU - Gambaudo JM AU - Iturriaga R AU - Paternain GP AD - CIMAT, Guanajuato 36000, MexicoUniv Bourgogne, Inst Math Bourgogne, UMR CNRS 5584, F-21078 Dijon, FranceUniv Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WB, EnglandContreras, G, CIMAT, AP 402, Guanajuato 36000, Mexico TI - The asymptotic Maslov index and its applications AB - Let N be a 2n-dimensional manifold equipped with a symplectic structure omega and Lambda(N) be the Lagrangian Grassmann bundle over N. Consider a flow phi(t) on N that preserves the symplectic structure and a phi(t)-invariant connected submanifold Sigma. Given a continuous section Sigma --> Lambda(N), we can associate to any finite phi(t)-invariant measure with support in E, a quantity, The asymptotic Maslov index, which describes the way Lagrangian planes are asymptotically wrapped in average around the Lagrangian Grassmann bundle. We pay particular attention to the case when the flow is derived from an optical Hamiltonian and when the invariant measure is the Liouville measure on compact p energy levels. The situation when the energy levels are not compact is discussed MH - United Kingdom MH - France MH - Mexico|Guanajuato PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0143-3857 UR - ISI:000186600100006 L2 - MANIFOLDS; CYCLES SO - Ergodic Theory and Dynamical Systems 2003 ;23():1415-1443 7747 UI - 8261 AU - Corbacho AM AU - Macotela Y AU - Nava G AU - Eiserich JP AU - Cross CE AU - de la Escalera GM AU - Clapp C AD - UNAM, Inst Neurobiol, Juriquilla 76001, Queretaro, MexicoUniv Calif Davis, Dept Internal Med, Div Pulm & Crit Care Med, Dept Internal Med, Davis, CA 95616, USAUniv Calif Davis, Dept Internal Med, Div Nephrol, Dept Internal Med, Davis, CA 95616, USAClapp, C, UNAM, Inst Neurobiol, Apartado Postal 1-1141, Juriquilla 76001, Queretaro, Mexico TI - Cytokine induction of prolactin receptors mediates prolactin inhibition of nitric oxide synthesis in pulmonary fibroblasts AB - Prolactin (PRL) has been implicated as a modulator of immune function, and some of its actions may be linked to NO synthesis. Because NO acts as a mediator of inflammation, we speculated that an inflammatory milieu could unmask pathways by which PRL could affect NO synthesis. Here, we show that pro-inflammatory cytokines induce the expression of PRL receptors in pulmonary fibroblasts, allowing PRL to inhibit cytokine-induced NO production and the expression of the inducible nitric oxide synthase (iNOS). Inhibition of iNOS expression by PRL correlates with the phosphorylation of STAT-5b (signal transducer and activator of transcription 5b) and the suppression of expression of IRF-1 (interferon regulatory factor 1), a transcription factor for iNOS. These results reveal previously unrecognized mechanisms by which PRL and PRL receptors may play significant modulatory roles during immune-inflammatory processes. (C) 2003 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000183393500031 L2 - prolactin;prolactin receptor;nitric oxide;iNOS;pro-inflammatory cytokine;STAT-5b;IRF-1;SMOOTH-MUSCLE CELLS; REGULATORY FACTOR-I; NF-KAPPA-B; SIGNAL-TRANSDUCTION; SYNTHASE EXPRESSION; TRANSFORMING GROWTH-FACTOR-BETA-1; MESANGIAL CELLS; GROWTH-FACTOR; IFN-GAMMA; ACTIVATION SO - Febs Letters 2003 ;544(1-3):171-175 7748 UI - 9602 AU - Cordero C AU - Eberhard WG AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Costa Rica, Escuela Biol, San Jose, Costa RicaCordero, C, Univ Nacl Autonoma Mexico, Inst Ecol, Apdo Post 70-275,Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Female choice of sexually antagonistic male adaptations: a critical review of some current research AB - We contrast some recent uses of the concept of male-female conflict, with the type of conflict that is inherent in traditional Darwinian female choice. Females in apparent conflict situations with males may suffer reduced lifetime reproduction, but nevertheless benefit because they obtain sons with superior manipulative abilities. Female defences against male manipulations may not be 'imperfect' because of inability to keep pace with male evolution, but in order to screen males and favour those that are especially good manipulators. We examine the consequences of these ideas, and of the difficulties of obtaining biologically realistic measures of female costs, for some recent theoretical and empirical presentations of male-female conflict ideas, and find that male-female conflict in the new sense is less certain than has been commonly supposed. Disentangling previous sexual selection ideas and the new conflict of interest models will probably often be difficult, because the two types of payoffs are not mutually exclusive MH - Costa Rica MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 81 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Review AV - English IS - 1010-061X UR - ISI:000179649000001 L2 - female choice;intersexual coevolution;laboratory studies;sexual conflict;ACCESSORY-GLAND PRODUCTS; MATE CHOICE; DROSOPHILA-MELANOGASTER; SELECTION; CONFLICT; FITNESS; PERSPECTIVE; COEVOLUTION; RESISTANCE; EVOLUTION SO - Journal of Evolutionary Biology 2003 ;16(1):1-6 7749 UI - 6493 AU - Cordoba-Aguilar A AU - Uhia E AU - Rivera AC AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Vigo, EUET Forestal, Dept Ecol & Biol Anim, GRp Ecol Evolut, Pontevedra 36005, SpainCordoba-Aguilar, A, Univ Nacl Autonoma Mexico, Inst Ecol, Apdo Postal 70-275,circuito Exterior Ciudad Univ, Mexico City 04510, DF, Mexico TI - Sperm competition in Odonata (Insecta): the evolution of female sperm storage and rivals' sperm displacement AB - Odonates (dragonflies) are well known for the ability of the mates to displace sperm stored in the female's sperm-storage organs during copulation. By this means, copulating mates are able to increase their fertilization success. This ability has been used as an example to illustrate a conflict of interests between the sexes in which males have evolved sperm-displacement mechanisms whilst females have presumably evolved means to avoid sperm displacement. The present review has four aims: (1) to describe the copulatory mechanisms used during sperm displacement; (2) to analyse the causes of sperm usage patterns; (3) to discuss this information using current hypotheses on conflict between the sexes; (4) to illuminate topics for further research. Four copulatory mechanisms are described: sperm removal (physical withdrawal of stored sperm), sperm repositioning ('pushing' of rival sperm to sites where its use will be least likely), female sensory stimulation to induce sperm ejection, and sperm flushing (displacement of sperm using the copulating male's sperm). Sperm-precedence studies in Odonata are scarce and their values vary considerably between species. In those species in which sperm displacement is incomplete, the last copulating male obtains a high but variable short-term fertilization success which decreases with time. Some male and female factors affecting sperm precedence patterns are mentioned: (1) male variation in genital morphology; (2) duration of copulation influenced by the male (the longer the copulation, the more stored sperm displaced); (3) adaptations of the sperm-storage organs that allow the female to manipulate the sperm she has received (i.e. avoiding sperm displacement, re-distributing sperm masses, favouring sperm located in certain sites and ejecting sperm after copulation). We suggest that male and female odonates have co-evolved at the level of genital function with the control of stored sperm as the focus of the conflict. The benefits for males in this co-evolution lie in maximizing their fertilization success. However, it is not clear what females obtain from storing sperm and making it unreachable during sperm displacement. Two hypothetical benefits that females may obtain for which some evidence has been gathered are genetic diversity and viability genes. It is finally suggested that odonates can become excellent subjects of study for testing current ideas related to sexual conflict and speciation processes through sexual selection MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Zoology U5 - J;Review AV - English IS - 0952-8369 UR - ISI:000188063900006 L2 - sperm competition;sexual conflict;Odonata;copulatory mechanisms;multiple mating;CALOPTERYX SPLENDENS XANTHOSTOMA; ISCHNURA-GRAELLSII ODONATA; DRAGONFLY SYMPETRUM-DANAE; COPULATION DURATION; SEXUAL SELECTION; ADAPTIVE SIGNIFICANCE; REPRODUCTIVE SUCCESS; WING PIGMENTATION; GENETIC BENEFITS; MALE DAMSELFLIES SO - Journal of Zoology 2003 ;261():381-398 7750 UI - 7842 AU - Cordoba-Aguilar A AU - Salamanca-Ocana JC AU - Lopezaraiza M AD - Univ Pablo Olavide, Dept Ciencias Ambientales, Seville, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Biol, Hidalgo, MexicoCordoba-Aguilar, A, Natl Autonomous Univ Mexico, Inst Ecol, Apdo Postal 70-275,Circuito Exterior Ciudad Univ, Mexico City 04510, DF, Mexico TI - Female reproductive decisions and parasite burden in a calopterygid damselfly (Insecta : Odonata) AB - There is currently a gap in sexual selection theory about how much the environment drives female mating decisions. We present field data that suggest that female sexual behaviour in the damselfly Calopteryx haemorrhoidalis is influenced by parasite burden. Male wing pigmentation in Calopteryx is a sexually selected trait that signals a male's ability to cope with eugregarine parasites (an intestinal parasite that feeds on the adult's ingested food). Because adult C. haemorrhoidalis females also show wing pigmentation, we examined whether this trait is similarly influenced by parasite burden and whether it may signal the female's reproductive value. Male C. haemorrhoidalis defend riverine substrates that females use for oviposition. After copulation and during oviposition, females are guarded by the copulating male against intruder males. Alternatively, females may avoid mating and 'steal' an oviposition site within a male's territory. In the present study, we found that the amount of female wing pigmentation was negatively correlated with the number of eugregarines present. Females with more parasites produced fewer eggs, survived fewer days, spent less time during courtship, 'inspected' fewer males before mating, had a lower mating success, were guarded for less time during oviposition and engaged in fewer 'stealing' events during oviposition. The reduced egg production and survival of heavily infected females may result from eugregarine depletion of the females' consumed food reserves. Thus, to offset reduced longevity, heavily infected females may accept a mating more rapidly and mate with fewer males. 'Stealing' behaviour may be related to the female's differential use of sperm from some males, particularly high-quality males. Interestingly, males that mated with low-pigmented females showed greater variance in wing pigmentation than did males that mated with high-pigmented females. Possibly, female wing pigmentation may signal a female's reproductive value, which provides females with longer mate-guarding episodes and reduced interference from intruder males. This study points out one possible constraint, intestine parasites, that females may face during mating decisions. Because females in bad condition mate with males in both good and bad condition, this constraint may be pervasive enough to weaken the intensity of selection for a male sexually selected trait, wing pigmentation, and help to maintain its variation in phenotypic expression. (C) 2003 Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0003-3472 UR - ISI:000184492000007 L2 - SPLENDENS XANTHOSTOMA CHARPENTIER; SEXUAL SELECTION; GREGARINE INFECTION; HETAERINA-AMERICANA; WING PIGMENTATION; STORED SPERM; MATE CHOICE; ZYGOPTERA; HAEMORRHOIDALIS; BEHAVIOR SO - Animal Behaviour 2003 ;66():81-87 7751 UI - 8958 AU - Cordoba E AU - Shishkova S AU - Vance CP AU - Hernandez G AD - UNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoUniv Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108, USAARS, USDA, Plant Sci Res Unit, St Paul, MN 55108, USAHernandez, G, UNAM, Ctr Invest Fijac Nitrogeno, Ap Postal 565-A, Cuernavaca, Morelos, Mexico TI - Antisense inhibition of NADH glutamate synthase impairs carbon/nitrogen assimilation in nodules of alfalfa (Medicago sativa L.) AB - Legumes acquire significant amounts of nitrogen for growth from symbiotic nitrogen fixation. The glutamine synthetase (GS)/NADH-dependent glutamate synthase (NADH-GOGAT) cycle catalyzes initial nitrogen assimilation. This report describes the impact of specifically reducing nodule NADH-GOGAT activity on symbiotic performance of alfalfa (Medicago sativa L.). Four independent transgenic alfalfa lines, designated GA89, GA87, GA88, and GA82 (for GOGAT antisense), containing an antisense NADH-GOGAT cDNA fragment under the control of the soybean leghemoglobin (lbc3) promoter were evaluated. The GA plants were fertile and showed normal growth in non-symbiotic conditions. The NADH-GOGAT antisense transgene was heritable and the T-1 plants showed phenotypic alterations - similar to primary transformants. Clonally propagated plants were inoculated with Sinorhizobium meliloti after rooting and the symbiotic phenotype was analyzed 21 days post-inoculation. Nodules of each GA line had reduced NADH-GOGAT activity, ranging from 33 to 87% of control plants, that was accompanied by comparable decreases in RNA and protein. Plants from the GA89 line, with the lowest NADH-GOGAT activity (c. 30%), presented a strikingly altered symbiotic phenotype: concomitantly activities of key enzyme for carbon and nitrogen assimilation decreased; nodule amino acids and amides were reduced while sucrose accumulated. Antisense GOGAT plants were chlorotic, reduced in fresh weight, and had a lower N content than control plants. Photosynthesis was also impaired in antisense plants. Specifically, reducing NADH-GOGAT in nodules resulted in plants having impaired nitrogen assimilation and altered carbon/nitrogen metabolic flux MH - Mexico|Morelos MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0960-7412 UR - ISI:000181505100008 L2 - NADH-glutamate synthase;antisense transgenic alfalfa;S. meliloti-alfalfa symbiosis;C/N metabolism in nodules;symbiotic N fixation;AMINO-ACID-METABOLISM; ROOT-NODULES; PHOSPHOENOLPYRUVATE CARBOXYLASE; NITROGEN-FIXATION; GENE-EXPRESSION; LEGUME NODULES; AMMONIA ASSIMILATION; TRANSGENIC PLANTS; SUCROSE SYNTHASE; N-2 FIXATION SO - Plant Journal 2003 ;33(6):1037-1049 7752 UI - 8711 AU - Cordova I AU - Jones P AU - Harrison NA AU - Oropeza C AD - Rothamsted Res, Plant Pathogen Interact Div, Harpenden AL5 2JQ, Herts, EnglandUniv Florida, Ft Lauderdale Res & Educ Ctr, Dept Plant Pathol, Ft Lauderdale, FL 33314, USACtr Invest Cientif Yucatan, Merida, MexicoJones, P, Rothamsted Res, Plant Pathogen Interact Div, Harpenden AL5 2JQ, Herts, England TI - In situ PCR detection of phytoplasma DNA in embryos from coconut palms with lethal yellowing disease AB - DNA of the lethal yellowing (LY) phytoplasma was detected in 13 of 72 embryos from fruits of four diseased Atlantic tall coconut palms by polymerase chain reaction (PCR) assays employing phytoplasma universal rRNA primer pair P1/P7, nested LY group-specific rRNA primer pair 503f/LY16Sr or LY phytoplasma-specific nonribosomal primer pair. LYF1/R1. Phytoplasma distribution in sectioned tissues from six PCR positive embryos was determined by in situ PCR and digoxigenin-11-deoxy-UTP (Dig) labelling of amplification products. Dig-labeled DNA products detected by colourimetric assay were clearly evident on sections from the same three embryos investigated in detail by in situ PCRs employing primer pairs P1/P7 or LYF1/R1. Deposition of blue-green stain on sections as a result of each assay was restricted to areas of the embryos corresponding to the plumule and cells ensheathing it. By comparison, similarly treated embryo sections derived from fruits of a symptomless Atlantic tall coconut palm were consistently devoid of any stain. Presence of phytoplasma DNA in embryo tissues suggests the possible potential for seed transmission which remains to be demonstrated MH - United Kingdom MH - Mexico|Yucatan MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Plant Sciences U5 - J;Article AV - English IS - 1464-6722 UR - ISI:000182188100003 L2 - POLYMERASE CHAIN-REACTION; MYCOPLASMA-LIKE ORGANISM; ELECTRON-MICROSCOPY; SALIVARY-GLANDS; FLORIDA; PLANTS; IDENTIFICATION; HYBRIDIZATION; MOLLICUTES; DECLINE SO - Molecular Plant Pathology 2003 ;4(2):99-108 7753 UI - 7739 AU - Coronas FV AU - Stankiewicz M AU - Batista CVF AU - Giraud S AU - Alam JM AU - Possani LD AU - Mebs D AU - Pelhate M AD - Univ Frankfurt, Zentrum Rechtsmed, D-60596 Frankfurt, GermanyNatl Autonomous Univ Mexico, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoNicholas Copernicus Univ, Inst Gen & Mol Biol, Biophys Lab, PL-87100 Torun, PolandUniv Angers, Neurophysiol Lab, F-49045 Angers, FranceLiaquat Natl Postgrad Med Ctr, Dept Biochem, Karachi 74800, PakistanMebs, D, Univ Frankfurt, Zentrum Rechtsmed, Kennedyallee 104, D-60596 Frankfurt, Germany TI - Primary structure and electrophysiological characterization of two almost identical isoforms of toxin from Isometrus vittatus (family : Buthidae) scorpion venom AB - Two almost identical proteins with 70 amino acid residues each, closely packed by four disufide bridges, and molecular masses of 7899.5 and 7884.7 were isolated and sequenced from the venom of the scorpion Isometrus vittatus from Pakistan. They differ by an acidic amino acid residue (glutamic or aspartic) at the same position 55 of the peptide chain, however, they exhibit the same length, the same charge and are undistinguishable when separated by C-18 reverse phase HPLC. The mixture of the two proteins called IsomTx1 depolarizes the cockroach isolated axon; artificial repolarization is followed by sustained repetitive activity, artificial hyperpolarization facilitates bursting activity observed as an answer to rapid depolarization to -60 mV. The depolarization is antagonized by TTX. In voltage-clamp experiments IsomTx1 increases axonal sodium permeability which has a particular importance between resting and threshold potentials and moderately slows down the fast inactivation. These characteristics closely resemble those of other anti-insect scorpion toxins classified as contractive toxins from Androctonus and Buthotus venoms. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Germany MH - Mexico|Morelos MH - Pakistan MH - Poland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000184568100008 L2 - anti-insect toxin;axonal membrane;cockroach isolated axon;Isometrus vittatus;scorpion toxin;BUTHUS-MARTENSI; VOLTAGE-CLAMP; GIANT-AXON; PURIFICATION; COCKROACH; CHANNELS; INSECTS; NEUROTOXIN; PEPTIDES; SEQUENCE SO - Toxicon 2003 ;41(8):989-997 7754 UI - 9203 AU - Coronas FV AU - de Roodt AR AU - Olamendi-Portugal T AU - Zamudio FZ AU - Batista CVF AU - Gomez-Lagunas F AU - Possani LD AD - UNAM, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca 62210, Morelos, MexicoAdm Nacl Labs, Natl Inst Prod Biol, Buenos Aires, DF, ArgentinaInst Salud Dr Carlos G Malbran, Buenos Aires, DF, ArgentinaNatl Autonomous Univ Mexico, Sch Med, Dept Physiol, Mexico City 04510, DF, MexicoPossani, LD, UNAM, Inst Biotechnol, Dept Mol Recognit & Struct Biol, Ave Univ,2001,Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Disulfide bridges and blockage of Shaker BK+-channels by another butantoxin peptide purified from the Argentinean scorpion Tityus trivittatus AB - A peptide was isolated from the venom of the scorpion Tityus trivittatus. It is an isoform of the toxin TsTX-IV earlier described [Toxicon 37 (1999) 651] and identical to butantoxin [Arch. Biochem. Biophys. 379 (2000) 18], both isolated from the Brazilian scorpion Tityus serrulatus. This newly characterized peptide contains 40 amino acid residues with a molecular mass of [M + H+] 4507.0, cross-linked by four disulfide bridges, made between the cysteine pairs: Cys2-Cys5, Cys10-Cys31, Cys16-Cys36 and Cys20-Cys38. It blocks in a completely reversible manner the Shaker B K+-channels, with a K-d around 660 nM. It belongs to the sub-family 12 and it is now being classified as alpha-KTx 12.2. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000180881400007 L2 - butantoxin;disulfide bridge;K+-channel;scorpion toxin;Shaker B;GATED K+ CHANNELS; PANDINUS IMPERATOR; TOXIN; VENOM; MAUROTOXIN; ACTS SO - Toxicon 2003 ;41(2):173-179 7755 UI - 8273 AU - Correa JC AU - Badaro R AU - Bumroongkit C AU - Mera JR AU - Dolmann AL AU - Martinez LGJ AU - Mayrinck LR AU - Tamez R AU - Yang JY AD - Hosp Veneravel Ordem Terceira Sao Francisco Penit, Rio De Janeiro, BrazilUniv Fed Bahia, Edgard Santos Univ Hosp, Salvador, BA, BrazilChang Mai Univ, Chiang Mai, ThailandUniv Aconcagua, Mendoza, ArgentinaHosp Antonio A Cetranglo, Buenos Aires, DF, ArgentinaInst Mexicano Seguro Social, Nuevo Leon, MexicoHosp Servidores Estado Rio Janeiro, Rio De Janeiro, BrazilBristol Myers Squibb Co, Mexico City, DF, MexicoBristol Myers Squibb Co, Wallingford, CT 06492, USACorrea, JC, Rua Toneleros 248-702, BR-22030000 Copacabana, RJ, Brazil TI - Randomized, open-label, parallel-group, multicenter study of the efficacy and tolerability of IV gatifloxacin with the option for oral stepdown gatifloxacin versus IV ceftriaxone (with or without erythromycin or clarithromycin) with the option for oral stepdown clarithromycin for treatment of patients with mild to moderate community-acquired pneumonia requiring hospitalization AB - Background: Empiric therapy for community-acquired pneumonia (CAP) requires the use of antibiotics with activity against a broad spectrum of respiratory pathogens and suitable pharmacokinetic properties to simplify IV-to-oral step-down therapy switches. Objective: The aim of this study was to compare the efficacy and tolerability of IV gatifloxacin with the option for oral stepdown gatifloxacin with a standard regimen of IV ceftriaxone (with or without erythromycin or clarithromycin) with the option for oral stepdown clarithromycin in patients with mild to moderate CAP requiring hospitalization. Methods: In a randomized, open-label, parallel-group, multicenter study, adults with CAP received 7 to 14 days of treatment with either IV gatifloxacin 400 mg QD with the stepdown option or IV ceftriaxone 1 or 2 g QD (with or without erythromycin 0.5 or 1 g QID or clarithromycin 500 mg BID) with the stepdown option. Results: One hundred seventy adults with CAP were included in the study IV gatifloxacin was stepped down to oral gatifloxacin in 90.6% (77/85) of patients; IV ceftriaxone was stepped down to oral clarithromycin in 87.1% (74/85) of patients. Among clinically evaluable patients (n = 153), cure rates at 1 to 3 days after treatment were 97.4% in the gatifloxacin group (74/76) and 90.9% in the ceftriaxone group (70/77), with a 95% Cl for the difference (-3.7% to 19.1%) indicating statistical equivalence. In patients in whom pathogens were isolated from pretreatment sputum cultures, bacteriologic eradication rates were 100.0% (29/29) and 90.9% (30/33), respectively. Both regimens were well tolerated; treatment-related adverse events occurred in 27.1% (23/85) and 21.2% (18/85) of patients, respectively Conclusions: In the population studied, treatment with IV gatifloxacin with an option for oral stepdown gatifloxacin was as effective for achieving clinical cure as IV ceftriaxone (with or without concomitant IV erythromycin or clarithromycin) with an option for oral stepdown clarithromycin. Both regimens were well tolerated. Copyright (C) 2003 Excerpta Medica, Inc MH - Argentina MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Thailand MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0149-2918 UR - ISI:000183452700009 L2 - gatifloxacin;ceftriaxone;clarithromycin;erythromycin;community-acquired pneumonia;tolerability;STREPTOCOCCUS-PNEUMONIAE; THERAPY; FLUOROQUINOLONES; GUIDELINES; MANAGEMENT; INFECTIONS; FOCUS SO - Clinical Therapeutics 2003 ;25(5):1453-1468 7756 UI - 7099 AU - Corro G AU - Fierro JLG AU - Montiel R AU - Castillo S AU - Moran M AD - Univ Autonoma Puebla, Inst Ciencias Benemerita, Puebla 72570, MexicoCSIC, Inst Catalisis & Petr Quim, Madrid 28049, SpainInst Mexicano Petr, Mexico City 0700, DF, MexicoCorro, G, Univ Autonoma Puebla, Inst Ciencias Benemerita, 14 Sur 6301, Puebla 72570, Mexico TI - A highly sulfur resistant Pt-Sn/gamma-Al2O3 catalyst for C3H8-NO-O-2 reaction under lean conditions AB - The selective catalytic reduction (SCR) of NO with C3H8 was studied over 1% Pt/gamma-Al2O3, and 1% Pt-2% Sn/gamma-Al2O3 catalysts. The SO2 effect on the catalysts activity was examined using pre-sulfated samples of the above catalysts and SO2-containing feeds. A high SO2 tolerance of 1% Pt-2% Sn/gamma-Al2O3 pre-sulfated catalyst for C3H8-NO-O-2 reaction was found. Above 200degreesC, NO was converted mainly into N-2 and N2O. Surface analysis of both unsulfated and pre-sulfated catalysts by X-ray photoelectron spectroscopy (XPS) revealed that Sn addition to 1% Pt/gamma-Al2O3 prevents Pt particles from sintering during high temperature sulfation process. This fact suggests that a Pt-Sn/gamma-Al2O3 catalyst can resist high temperature reactions during automotive exhaust control without losing Pt active area. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Engineering, Environmental;Engineering, Chemical U5 - J;Article AV - English IS - 0926-3373 UR - ISI:000186259900009 L2 - sulfated Pt-Sn catalysts;sulfur deactivation resistance;lean-burn conditions;NOx reduction;promotion by Sn;propane combustion;SELECTIVE REDUCTION; ALUMINA CATALYST; BURN CONDITIONS; NOX CATALYSIS; SO2; OXIDATION; HYDROCARBONS; PT/AL2O3; OXIDES; C3H6 SO - Applied Catalysis B-Environmental 2003 ;46(2):307-317 7757 UI - 7668 AU - Corro G AU - Fierro JLG AU - Odilon VC AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72570, MexicoCSIC, Inst Catalisis & Petroleoquim, Madrid 28049, SpainCorro, G, Benemerita Univ Autonoma Puebla, Inst Ciencias, 14 Sur 6301, Puebla 72570, Mexico TI - An XPS evidence of Pt4+ present on sulfated Pt/Al2O3 and its effect on propane combustion AB - The nature of the active sites of non-sulfated and sulfated 1%Pt/gamma-Al2O3 has been investigated for the combustion of propane. An enhancement in the activity for propane oxidation was confirmed with the sulfated catalyst. FTIR spectroscopy proved the formation of sulfate species in the catalyst surface. XPS results revealed an increased formation of a highly oxidized Pt species over sulfated 1%Pt/gamma-Al2O3 that suggests that the promoting effect on the propane combustion is due to the interaction of surface sulfates with surface highly oxidized Pt atoms that can be ascribed to Pt-4divided by. at the edge of the Pt particles. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1566-7367 UR - ISI:000184927100004 L2 - Pt sulfated catalysts;C3H8 combustion;XPS on sulfated Pt catalyst;SULFUR-DIOXIDE; OXIDATION; CATALYSTS; SO2; PLATINUM; ALUMINA SO - Catalysis Communications 2003 ;4(8):371-376 7758 UI - 6917 AU - Corsi-Cabrera M AU - Sanchez AI AU - del-Rio-Portilla Y AU - Villanueva Y AU - Perez-Garci E AD - Univ Nacl Autonoma Mexico, Fac Psicol, Mexico City 04510, DF, MexicoUniv Granada, Fac Psicol, Granada, SpainCorsi-Cabrera, M, Univ Nacl Autonoma Mexico, Fac Psicol, Av Univ 3004, Mexico City 04510, DF, Mexico TI - Effect of 38 h of total sleep deprivation on the waking EEG in women: sex differences AB - 38 h of sleep deprivation in women resulted in decreased alpha, increased theta and increased intrahemispheric correlation during rest and increased theta and reaction time during task. F3-O1 coherent activity was selectively decreased consistent with the role of sleep for recovery of frontal functions. Sleep deprivation effects were milder in women than in men, however, recovery was not complete suggesting that women need more sleep than men to recover. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Biological;Neurosciences;Physiology;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 0167-8760 UR - ISI:000186595200004 L2 - sleep deprivation;women;spectral power;EEG correlation;EEG coherence;frontal lobes;MENSTRUAL-CYCLE PHASE; HUMAN CORPUS-CALLOSUM; CEREBRAL BLOOD-FLOW; SLOW-WAVE SLEEP; COGNITIVE PERFORMANCE; GENDER DIFFERENCES; SPECTRAL-ANALYSIS; FEMALE EXPOSURE; REACTION-TIME; YOUNG-ADULTS SO - International Journal of Psychophysiology 2003 ;50(3):213-224 7759 UI - 8549 AU - Corsi-Cabrera M AU - Miro E AU - del-Rio-Portilla Y AU - Perez-Garci E AU - Villanueva Y AU - Guevara MA AD - Univ Nacl Autonoma Mexico, Fac Psicol, Mexico City 04510, DF, MexicoUniv Granada, Fac Psicol, Granada, SpainUniv Guadalajara, Inst Neurociencias, Guadalajara 44430, Jalisco, MexicoCorsi-Cabrera, M, Univ Nacl Autonoma Mexico, Fac Psicol, Av Univ 3004, Mexico City 04510, DF, Mexico TI - Rapid eye movement sleep dreaming is characterized by uncoupled EEG activity between frontal and perceptual cortical regions AB - EEG coherent activity is involved in the binding of spatially separated but temporally correlated stimuli into whole events. Cognitive features of rapid eye movement sleep (REM) dreaming resemble frontal lobe dysfunction. Therefore, temporal coupling of EEG activity between frontal and perceptual regions was analyzed from 10 min prior to dream reports (8 adults) from stage-2 and REM sleep. EEG correlation between frontal and perceptual regions decreased and, among perceptual regions increased during REM. The temporal dissociation of EEG activity between executive and perceptual regions supplies an inadequate mechanism for the binding and interpretation of ongoing perceptual activity resulting in dream bizarreness. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Neurosciences;Psychology, Experimental U5 - J;Article AV - English IS - 0278-2626 UR - ISI:000182789400010 L2 - EEG coherence;EEG correlation;spectral analysis;dreaming;REM sleep;frontal lobe;HUMAN REM-SLEEP; VISUAL-CORTEX; OSCILLATIONS; ACTIVATION; WAKEFULNESS; COHERENCE; ELECTROENCEPHALOGRAM; SYNCHRONIZATION; MENTATION; AROUSAL SO - Brain and Cognition 2003 ;51(3):337-345 7760 UI - 9387 AU - Cortes-Ortiz L AU - Bermingham E AU - Rico C AU - Rodriguez-Luna E AU - Sampaio I AU - Ruiz-Garcia M AD - Univ E Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, EnglandSmithsonian Trop Res Inst, Naos Labs, Unit 0948, APO, AA 34002, USAUniv Veracruzana, Inst Neuroetol, Jalapa, Veracruz, MexicoFed Univ Para, BR-66059 Belem, Para, BrazilPontificia Univ Javeriana, Bogota, ColombiaCortes-Ortiz, L, Univ E Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, England TI - Molecular systematics and biogeography of the Neotropical monkey genus, Alouatta AB - We take advantage of the broad distribution of howler monkeys from Mexico to Argentina to provide a historical biogeographical analysis on a regional scale that encompasses the entire Neotropics. The phylogenetic relationships among 9 of the 10 recognized Alouatta species were inferred using three mitochondrial and two nuclear genes. The nuclear gene regions provided no phylogenetic resolution among howler monkey species, and were characterized by very low levels of sequence divergence between Alouatta and the Ateles outgroup. The mtDNA genes, on the other hand, produced a well-resolved phylogeny, which indicated that the earliest split among howler monkeys separated cis- and trans-Andean clades. Eight monophyletic mtDNA haplotype clades were identified, representing six named species in South America, including Alouatta seniculus, Alouatta sara, Alouatta macconelli, Alouatta caraya, Alouatta belzebul, and Alouatta guariba, and two in Mesoamerica, Alouatta pigra and Alouatta palliata. Molecular clock-based estimates of branching times indicated that contemporary howler monkey species originated in the late Miocene and Pliocene, not the Pleistocene. The causes of Alouatta diversification were more difficult to pin down, although we posit that the initial cis-, trans-Andean split in the genus was caused by the late Miocene completion of the northern Andes. Riverine barriers to dispersal and putative forest refuges can neither be discounted nor distinguished as causes of speciation in many cases, and one, the other or both have likely played a role in the diversification of South American howler monkeys. Finally, we estimated the separation of Mesoamerican A. pigra and A. palliata at 3 Ma, which corresponds to the completion date of the Panama Isthmus promoting a role for this earth history event in the speciation of Central American howler monkeys. (C) 2002 Elsevier Science (USA). All rights reserved MH - Brazil MH - Colombia MH - United Kingdom MH - Mexico|Veracruz MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 33 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Review AV - English IS - 1055-7903 UR - ISI:000180330600008 L2 - mitochondrial DNA;Andes mountains;Panama Isthmus;riverine barriers;calmodulin;recombination activating gene 1;Ateles;Brachyteles;molecular clock;MITOCHONDRIAL-DNA SEQUENCES; RED HOWLER MONKEY; WORLD MONKEYS; PHYLOGENETIC-RELATIONSHIPS; DISPERSAL PATTERNS; RIVERINE BARRIERS; CYTOCHROME-B; PRIMATES; PLATYRRHINI; NUCLEAR SO - Molecular Phylogenetics and Evolution 2003 ;26(1):64-81 7761 UI - 6685 AU - Cortes-Perez NG AU - Bermudez-Humaran LG AU - Le Loir Y AU - Rodriguez-Padilla C AU - Gruss A AU - Saucedo-Cardenas O AU - Langella P AU - Montes-de-Oca-Luna R AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceInst Mexicano Seguro Social, Ctr Invest Biomed, Monterrey 64120, NL, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol & Virol, San Nicolas De Los Garza 66450, NL, MexicoLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - Mice immunization with live lactococci displaying a surface anchored HPV-16 E7 oncoprotein AB - E7 oncoprotein of human papillomavirus-16 (HPV-16) is constitutively produced in cervical cancer (CxCa) and is a good candidate for the design of therapeutic vaccines. In this work, the nisin-controlled expression system was used to display the E7 protein at the cell surface of the food-grade Gram-positive bacterium Lactococcus lactis. An efficient cell wall anchoring of E7 was obtained. Intranasal administration of these recombinant lactococci in mice induced an HPV-16 E7-specific immune response. This is the first report of E7 cell wall anchoring in L. lactis and represents one more step towards the use of live food-grade bacteria to fight against CxCa. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - France MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000187362100006 L2 - Lactococcus lactis;cancer;human papillomavirus;vaccine;immunogenic;CONTROLLED GENE-EXPRESSION; LACTIC-ACID BACTERIA; SUBSP LACTIS; PROTEIN; ANTIGEN; STREPTOCOCCI; INTRANASAL; SECRETION; CYTOKINE; DELIVERY SO - Fems Microbiology Letters 2003 ;229(1):37-42 7762 UI - 8118 AU - Cortes P AU - Lozano K AU - Barrera EV AU - Bonilla-Rios J AD - Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005, USAUniv Texas, Dept Mech Engn, Edinburg, TX 78539, USAInst Tecnol & Estudios Monterrey, Carrera Licenciado Ciencias Quim, Monterrey 64890, NL, MexicoBarrera, EV, Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005, USA TI - Effects of nanofiber treatments on the properties of vapor-grown carbon fiber reinforced polymer composites AB - Vapor-grown carbon fibers (VGCFs) were exposed to a series of chemical treatments and to electro-chemical deposition of copper to modify their surface conditions and alter their electrical properties. The fibers were then mixed with polypropylene using a Banbury-type mixer obtaining composites up to 5 wt % VGCFs. Rheological, electrical, and mechanical properties were evaluated and compared to unfilled polypropylene processed in a similar manner. The composites made with HNO3-treated VGCFs showed a lower electrical resistivity compared to the untreated samples. The composites containing VGCFs subjected to the copper electrodeposition process showed the lowest resistivity with no change in the mechanical proper-ties. Changes in rheological properties demonstrated the effects of varying surface conditions of the VGCFs. Microscopic analysis of these composites showed a heterogeneous distribution of VGCFs forming an interconnected network with the presence of copper on the surface of the VGCFs and in the matrix. Both the interconnected network and the presence of copper led to a lower percolation threshold than those seen in a previous work where high dispersion was sought. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Nuevo Leon MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000183814900036 L2 - nanofiber;polymer composites;nanofiber treatment;electrical resistivity;THERMOPLASTIC COMPOSITES; MECHANICAL-PROPERTIES; ELECTRICAL-PROPERTIES; BLACK; CONDUCTION; NANOTUBES; MATRIX SO - Journal of Applied Polymer Science 2003 ;89(9):2527-2534 7763 UI - 8893 AU - Cortese L AU - Gavazzi G AU - Iglesias-Paramo J AU - Boselli A AU - Carrasco L AD - Univ Studi Milano Bicocca, I-20126 Milan, ItalyLab Astrophys Marseille, F-13376 Marseille, FranceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoCortese, L, Univ Studi Milano Bicocca, Pzza Sci 3, I-20126 Milan, Italy TI - Optical spectroscopy and the UV luminosity function of galaxies in the Abell 1367, Coma and Virgo clusters AB - Optical spectroscopy of 93 galaxies, 60 projected in the direction of Abell 1367, 21 onto the Coma cluster and 12 on Virgo, is reported. The targets were selected because they were detected in previous Halpha, UV or r' surveys. The present observations bring to 100% the redshift completeness of Halpha selected galaxies in the Coma region and to 75% in Abell 1367. All observed galaxies except one show Halpha emission and belong to the clusters. This confirms previous determinations of the Halpha luminosity function of the two clusters that were based on the assumption that all Halpha detected galaxies were cluster members. Using the newly obtained data we re-determine the UV luminosity function of Coma and we compute for the first time the UV luminosity function of A1367. Their faint end slopes remain uncertain (-2.00 < α < - 1.35) due to insufficient knowledge of the background counts. If 90% of the UV selected galaxies without redshift will be found in the background ( as our survey indicates), the slope of UV luminosity function will be alphasimilar to - 1.35, in agreement with the UV luminosity function of the field (Sullivan et al. 2000) and with the Halpha luminosity functions of the two clusters (Iglesias-Paramo et al. 2002). We discover a point-like Halpha source in the Virgo cluster, associated with the giant galaxy VCC873, possibly an extragalactic HII region similar to the one recently observed in Virgo by Gerhard et al. (2002) MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000181708800009 L2 - galaxies : distances and redshifts;galaxies : luminosity function, mass function;galaxies : clusters : individuals : Abell 1367, Coma, Virgo;CATALOG; REGION; CORE SO - Astronomy & Astrophysics 2003 ;401(2):471-478 7764 UI - 7314 AU - costa-Rivero N AU - Falcon V AU - Alvarez C AU - Musacchio A AU - Chinea G AU - de la Rosa MC AU - Rodriguez A AU - Duenas-Carrera S AU - Tsutsumi V AU - Shibayama M AU - Menendez I AU - Luna-Munoz J AU - Miranda-Sanchez MM AU - Kouri J AU - Morales-Grillo J AD - Ctr Genet Engn & Biotechnol, Div Biomed, Havana 10600, CubaIPN, CINVESTAV, Mexico City 07738, DF, MexicoAcosta-Rivero, N, Ctr Genet Engn & Biotechnol, Div Biomed, POB 6162, Havana 10600, Cuba TI - Structured HCV nucleocapsids composed of P21 core protein assemble primary in the nucleus of Pichia pastoris yeast AB - The relationship between HCV core protein (HCcAg) processing and the structural composition and morphogenesis of nucleocapsid-like particles (NLPs) produced in Pichia pastoris cells was studied. At early stages of heterologous expression, data suggest that HCcAg (in the P21 form) was transported soon after its synthesis in the cytoplasm into the nucleus. HCcAg assembly into nucleocapsid-like particles with 20-30 nm in diameter took place primary in the cell nucleus. However, at later stages, when P21 and P23 forms were co-detected, data suggest that new assembly of nucleocapsid particles containing P21 possibly occurs at ER membranes and in the cytoplasm. This is the first report showing that structured HCV NLPs composed of P21 core protein assemble primary in the nucleus of P. pastoris yeast. (C) 2003 Elsevier Inc. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000185835500008 L2 - hepatitis C;core antigen;nucleocapsid-like particles;Pichia pastoris;HEPATITIS-C VIRUS; INFECTED PATIENTS; PARTICLES; LOCALIZATION; EVIDENCES; CLEAVAGE; GENOME; FORM SO - Biochemical and Biophysical Research Communications 2003 ;310(1):48-53 7765 UI - 7925 AU - Costas M AU - Xifra R AU - Llobet A AU - Sola M AU - Robles J AU - Parella T AU - Stoeckli-Evans H AU - Neuburger M AD - Univ Girona, Dept Quim, E-17071 Girona, SpainUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoUniv Girona, Inst Quim Computac, E-17071 Girona, SpainUniv Autonoma Barcelona, Serv RMN, E-08193 Barcelona, SpainUniv Neuchatel, Inst Chem, CH-2000 Neuchatel, SwitzerlandUniv Basel, Inst Anorgan Chem, CH-4056 Basel, SwitzerlandLlobet, A, Univ Girona, Dept Quim, Campus Montilivi, E-17071 Girona, Spain TI - Dinuclear copper(I) complexes with hexaaza macrocyclic dinucleating ligands: Structure and dynamic properties AB - The synthesis and structural and spectroscopic characterization of a family of copper(I) complexes, containing a dinucleating hexaaza macrocyclic ligand, of general formula [Cu-2(L)(X)(2)](2+) (L = Me2p, Me2m, Me3p, or Me3m; X = MeCN, n-PrCN, CO, t-BuNC, or PPh3) is described. This family of complexes contains ligands that differ from one another in the number of methylenic units linking the tertiary amines and in the meta or para substitution of their aromatic rings. The structural characterization in the solid-state includes a single-crystal X-ray diffraction analysis of [Cu-2(Me(2)p)(CO)(2)](2+) and of [Cu-2(Me2m)(t-BuNC)(2)](2+). In solution, those complexes are structurally characterized through NMR spectroscopy that also allows us to put forward and establish their fluxional behavior. Theoretical calculations at the DFT level have also been performed in order to further analyze the relative energy of the different potential isomers as well as to gain insight into their chemical properties. Finally, the influence of the hexaaza ligands over different structural aspects as well as on its potential chemical reactivity is discussed MH - Mexico|Guanajuato MH - Spain MH - Switzerland PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000184093400032 L2 - DENSITY-FUNCTIONAL THEORY; H BOND ACTIVATION; MOLECULAR-MECHANICS; CATALYTIC-OXIDATION; DIOXYGEN COMPLEX; DICOPPER(I) COMPLEXES; CRYSTAL-STRUCTURE; OXYGEN INSERTION; COMBINED QM/MM; FORCE-FIELD SO - Inorganic Chemistry 2003 ;42(14):4456-4468 7766 UI - 8844 AU - Cosultchi A AU - Rossbach P AU - Hernandez-Calderon I AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoRes Ctr Juelich, Cent Dept Chem Anal, Julich, GermanyIPN, CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoCosultchi, A, Inst Mexicano Petr, 152 Eje Cent L Cardenas, Mexico City 07730, DF, Mexico TI - XPS analysis of petroleum well tubing adherence AB - Undesired material adhered to the internal surface of the tubing wall of some petroleum wells is critical for crude oil production. Field samples of steel with petroleum solid adherence were characterized by means of x-ray photoelectron spectroscopy, x-ray diffraction and atomic absorption spectroscopy. The deposit naturally adhered on the steel surface is structurally formed by a thin, black and hard corrosion product layer (inner layer) similar to15 mum thick under a thick, black and brittle organic deposit layer (outer layer) similar to0.01 m thick composed mainly of hydrocarbons. This outer layer contains small amounts of barium sulphate (BaSO4) co-precipitated with organic compounds, which may contribute to the deposit's lack of cohesion. On the contrary, the inner layer of the deposit is firmly adhered to the steel substrate and contains clay minerals and iron compounds embedded in the hydrocarbon layer. Copyright (C) 2003 John Wiley Sons, Ltd MH - Germany MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0142-2421 UR - ISI:000181725200001 L2 - XPS;petroleum well;corrosion;adherence;PHOTOELECTRON-SPECTROSCOPY; IRON-OXIDES; SURFACE SO - Surface and Interface Analysis 2003 ;35(3):239-245 7767 UI - 8915 AU - Cota E AU - Aguado R AU - Creffield CE AU - Platero G AD - CSIC, Inst Ciencia Mat, Madrid, SpainUNAM, Ctr Ciencias Mat Condensada, Mexico City, DF, MexicoCota, E, CSIC, Inst Ciencia Mat, Madrid, Spain TI - Spin-polarized pumping in a double quantum dot AB - We study the pumping of spin-polarized electrons in a double quantum dot system with up to two electrons per dot, via an applied AC field and a constant magnetic field. The behaviour of the current through the double-dot system is studied as a function of the AC field and coupling to the leads, using a Markov master equation approach for the time evolution of the reduced density matrix. For up to two electrons in the system, we find that the formation of a spin-triplet state blocks the current through the device, and analyse possible solutions. When we incorporate three-and four-particle states, with up to two opposite spin electrons per dot, we find a regime where the pumping of spin-polarized electrons is realized through double occupancy states in each dot. This property is robust against spin-relaxation and decoherence processes which are taken into account phenomenologically. Finally we study the effects of applying a pulsed AC field and the possibility of the resolution of Rabi oscillations MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0957-4484 UR - ISI:000181624100011 L2 - DECOHERENCE; COHERENT SO - Nanotechnology 2003 ;14(2):152-156 7768 UI - 8371 AU - Couret A AU - Calderon HA AU - Veyssiere P AD - Ctr Elaborat Mat & Etud Struct, F-31055 Toulouse, FranceInst Politecn Nacl, Escuela Super Fis Met, Dept Ciencia Mat, Mexico City 07300, DF, MexicoOff Natl Etud & Rech Aerosp, CNRS, Lab Etud Microstruct, F-92322 Chatillon, FranceCouret, A, Ctr Elaborat Mat & Etud Struct, 29 Rue Jeanne Marvig,BP 4347, F-31055 Toulouse, France TI - Intralamellar dislocation networks formed by glide in gamma-TiAl - I. The mechanism of formation AB - In a lamellar TiAl alloy deformed at room temperature under an orientation that activates slip parallel to the interfaces, the gamma phase exhibits intralamellar dislocation networks parallel to the primary slip plane and entirely glissile in their habit plane. Their meshes are mainly rectangular with branches all coplanar, screw or near-screw in character and with Burgers vector of 1/2 <110] and 1/2 <112] types. Dislocation organization at and in the near-vicinity of these intralamellar networks suggests a reaction between a family of primary coplanar <011] dislocations that slip in the network habit plane and a family of 1/2 <110] dislocations that cross-slip from a plane inclined to the lamellae into the network. The reactions result in junctions with 1/2 <112] Burgers vector that subsequently transform into rectangular units. The presence of these networks is consistent with that of a residual elastic twist between adjacent gamma lamellae MH - France MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Mechanics;Metallurgy & Metallurgical Engineering;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1478-6443 UR - ISI:000182988900005 L2 - DEFORMATION TWINS; ROOM-TEMPERATURE; <011>(111) SLIP; AL ALLOYS; INTERFACES; TRANSMISSION; BOUNDARIES SO - Philosophical Magazine 2003 ;83(14):1699-1718 7769 UI - 7038 AU - Cowie MR AU - Mendez GF AD - Univ London Imperial Coll Sci Technol & Med, Natl Heart & Lung Inst, Fac Med, London SW3 6LY, EnglandUniv London Imperial Coll Sci Technol & Med, Royal Brompton Hosp, London, EnglandCardiol Hosp Siglo 21, Natl Med Ctr, Natl Mexicano Seguro Social, Mexico City, DF, MexicoCowie, MR, Univ London Imperial Coll Sci Technol & Med, Natl Heart & Lung Inst, Fac Med, Dovehouse St, London SW3 6LY, England TI - BNP and congestive heart failure MH - United Kingdom MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems U5 - J;Reprint AV - English IS - 0146-2806 UR - ISI:000186482200001 L2 - BRAIN NATRIURETIC PEPTIDE; LEFT-VENTRICULAR DYSFUNCTION; ACUTE MYOCARDIAL-INFARCTION; ANGIOTENSIN-CONVERTING-ENZYME; INCREASED PLASMA-LEVELS; TRANSLUMINAL CORONARY ANGIOPLASTY; IDIOPATHIC DILATED CARDIOMYOPATHY; NEUTRAL ENDOPEPTIDASE INHIBITION; HYPERVENTILATION-INDUCED ATTACKS; ASSOCIATION TASK-FORCE SO - Current Problems in Cardiology 2003 ;28(4):264-311 7770 UI - 7997 AU - Crissey SD AU - Silva JCS AU - Meehan T AU - Slifka KA AU - Bowen PE AU - Stacewicz-Sapuntzakis M AU - Holick MF AU - Chen TC AU - Mathieu J AU - Meerdink G AD - Brookfield Zoo, Chicago Zool Soc, Daniel F & Ada L Rice Conservat Biol & Res Ctr, Dept Nutrit Serv, Brookfield, IL 60513, USAInst Ecol AC, Xalapa, Veracruz, MexicoUniv Illinois, Chicago, IL, USABoston Univ, Sch Med, Vitamin D Skin & Bone Res Lab, Boston, MA, USAUniv Illinois, Urbana, IL 61801, USASlifka, KA, Brookfield Zoo, Chicago Zool Soc, Daniel F & Ada L Rice Conservat Biol & Res Ctr, Dept Nutrit Serv, Brookfield, IL 60513 USA TI - Nutritional status of free-ranging Mexican howler monkeys (Alouatta palliata mexicana) in Veracruz, Mexico: Serum chemistry; lipoprotein profile; vitamins D, A, and E; carotenoids; and minerals AB - The purpose of this work was to measure important nutritional status parameters for a group of free-ranging Mexican mantled howler monkeys (A. palliata mexicana) and compare those data to published data for primates. The nutritional status of six free-ranging Mexican mantled howler monkeys was examined using biochemical analysis. Blood samples were analyzed for serum chemistry; lipids; vitamins D, A, and E; carotenoids; and minerals. Serum chemistries were somewhat different from published values, but did not indicate clear abnormalities. Circulating lipids were not different from those in captive primates. Circulating vitamin D metabolites (83+/-16.3 for 25(OH)D ng/mL; 563+/-53.8 for 1,25(OH)(2)D pg/mL) were similar to those in wild-caught tamarins (Saguinus oedipus), lower than some published data for captive Cebidae and Callitrichidae, and higher than for Old World primates. Serum concentrations of retinol (16.5+/-1.64 mug/dl) were similar to those in captive spider monkeys (Ateles geoffroyi). Retinyl palmitate and retinyl stearate was present in howler samples and may have reflected recent dietary intake. Circulating alpha-tocopherol (997+/-97.6 mug/dl) was similar to published values for other primates. Carotenoid levels in howlers were within the ranges reported for many primates. A significant finding was the presence of cadmium in samples that should be further studied. The number of individuals sampled was limited, and further investigation into the effects of seasonality is needed. However, this information provides new data for howler monkeys and for free-ranging primates in general. (C) 2003 Wiley-Liss, Inc MH - USA MH - Mexico|Veracruz PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences;Zoology U5 - J;Article AV - English IS - 0733-3188 UR - ISI:000183950800003 L2 - Alouatta;howler monkeys;vitamins;carotenoids;cholesterol;cadmium;ALPHA-TOCOPHEROL; CIRCULATING CONCENTRATION; RETINYL ESTERS; D METABOLITES; PLASMA; PRIMATES; CHOLESTEROL; DIET SO - Zoo Biology 2003 ;22(3):239-251 7771 UI - 6599 AU - Cristobal-Salas A AU - Tchernykh A AU - Gaudiot JL AD - Univ Autonoma Baja California, Sch Chem Sci & Engn, Tijuana 22390, BC, MexicoCICESE Res Ctr, Comp Sci Dept, Ensenada 22830, Baja California, MexicoUniv Calif Irvine, Irvine, CA, USACristobal-Salas, A, Univ Autonoma Baja California, Sch Chem Sci & Engn, Tijuana 22390, BC, Mexico TI - Non-strict evaluation of the FFT algorithm in distributed memory systems AB - This paper focuses on the partial evaluation of local and remote memory accesses of distributed applications, not only to remove much of the excess overhead of message passing implementations, but also to reduce the number of messages, when some information about the input data set is known. The use of split-phase memory operations, the exploitation of spatial data locality, and non-strict information processing are described. Through a detailed performance analysis, we establish conditions under which the technique is beneficial. We show that by incorporating non-strict information processing to FFT MPI, a significant reduction of the number of messages can be archived, and the overall system performance can be improved MH - Mexico|Baja California MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000187497500028 SO - Recent Advances in Parallel Virtual Machine and Message Passing Interface 2003 ;2840():188-195 7772 UI - 8986 AU - Cristobal-Salas A AU - Tchernykh A AU - Gaudiot JL AU - Lin WY AD - CICESE Res Ctr, Ensenada, Baja California, MexicoUniv Calif Irvine, Dept Elect & Comp Engn, UCI Parallel Syst & Comp Architectures Lab, Irvine, CA 92697, USATIA Mobile Inc, Los Angeles, CA, USACristobal-Salas, A, CICESE Res Ctr, Ensenada, Baja California, Mexico TI - Non-strict execution in parallel and distributed computing AB - This paper surveys and demonstrates the power of non-strict evaluation in applications executed on distributed architectures. We present the design, implementation, and experimental evaluation of single assignment, incomplete data structures in a distributed memory architecture and Abstract Network Machine (ANM). Incremental Structures (IS), Incremental Structure Software Cache (ISSC), and Dynamic Incremental Structures (DIS) provide non-strict data access and fully asynchronous operations that make them highly suited for the exploitation of fine-grain parallelism in distributed memory systems. We focus on split-phase memory operations and non-strict information processing under a distributed address space to improve the overall system performance. A novel technique of optimization at the communication level is proposed and described. We use partial evaluation of local and remote memory accesses not only to remove much of the excess overhead of message passing, but also to reduce the number of messages when some information about the input or part of the input is known. We show that split-phase transactions of IS, together with the ability of deferring reads, allow partial evaluation of distributed programs without losing determinacy. Our experimental evaluation indicates that commodity PC clusters with both IS and a caching mechanism, ISSC, are more robust. The system can deliver speedup for both regular and irregular applications. We also show that partial evaluation of memory accesses decreases the traffic in the interconnection network and improves the performance of MPI IS and MPI ISSC applications MH - Mexico|Baja California MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0885-7458 UR - ISI:000181374500001 L2 - incremental structures;software cache;message passing;partial evaluation;non-strict information processing;MACHINE SO - International Journal of Parallel Programming 2003 ;31(2):77-105 7773 UI - 8508 AU - Cruces MP AU - Pimentel E AU - Zimmering S AD - Brown Univ, Program Biol, Div Biol & Med, Providence, RI 02912, USAININ, Dept Genet, Mexico City, DF, MexicoZimmering, S, Brown Univ, Program Biol, Div Biol & Med, Providence, RI 02912 USA TI - Evidence suggesting that chlorophyllin (CHLN) may act as an inhibitor or a promoter of genetic damage induced by chromium(VI) oxide (CrO3) in somatic cells of Drosophila AB - In Drosophila, 48 h-old larvae were pretreated for 24 It with chlorophyllin (CHLN) or sucrose and then treated with chromium(VI) oxide (CrO3) immediately following completion of the pretreatment period (0-day delay) or delayed 1, 2 or 3 days. The effects were scored in the wing spot test. After delays of 0 and I day, clear evidence of a protective effect of CHLN was found. Contrarily, after delays of 2 and 3 days, the results showed a reversal, i.e. CHLN-related events appeared more frequently than those in the sucrose control suggesting a promoting effect. It would appear prudent that CHLN be tested in a variety of situations in any given organism before decisions are reached regarding its inhibitor/promoter effects. (C) 2003 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000182688300015 L2 - dual effect;chlorophyllin;chromium(VI) oxide;Drosophila SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2003 ;536(1-2):139-144 7774 UI - 7685 AU - Cruz-Castillo JG AU - Woolley DJ AD - Univ Autonoma Chapingo, Ctr Reg Univ Oriente, Huatusco 94100, Veracruz, MexicoMassey Univ, Nat Resources Inst, Palmerston North, New ZealandCruz-Castillo, JG, Univ Autonoma Chapingo, Ctr Reg Univ Oriente, Apartado Postal 49, Huatusco 94100, Veracruz, Mexico TI - Organogenesis potential for kiwifruit (Actinidia deliciosa) cuttings and pedicel treated with Agromil-Plus (R) AB - A preliminary evaluation was made of the organogenesis capability of kiwifruit (Actinidia deliciosa) pedicels in vivo and orchard cuttings in vitro, using Agromil-Plus(R) (Agroenzymas Laboratories, Tlanepantla, Mexico) which is a mixture of CPPU (N-(2-chloro-4-pyridy)-N-'phenylurea) with natural bioregulators. 'Hayward' kiwifruit (A. deliciosa var. deliciosa) cuttings were submerged in a solution with a final concentration of 10 mul/litre CPPU plus natural bioregulators. Leafy shoot formation from callus was observed in 10% and 30% of the cuttings treated with Agromil-Plus(R) on the distal and proximal ends, respectively. For pedicel treatments, after the fruitlet was removed, the pedicel was inserted in a vial filled with Agromil-Plus(R). Leafy shoot formation from callus was recorded in 20% of the treated pedicels. Some cuttings from field-grown plants and pedicels were capable of producing shoots when they were treated with CPPU plus natural plant growth regulators MH - Mexico|Veracruz MH - New Zealand PB - WELLINGTON: SIR PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Horticulture U5 - J;Article AV - English IS - 0114-0671 UR - ISI:000184776500014 L2 - callus production;cytokinins;diphenylurea;indirect organogenesis;CALLUS; CPPU SO - New Zealand Journal of Crop and Horticultural Science 2003 ;31(2):193-196 7775 UI - 8361 AU - Cruz-Castillo JG AU - Woolley DJ AU - Lawes GS AD - Univ Autonoma Chapingo, Ctr Reg Univ Oriente, Hatusco 94100, Veracruz, MexicoMassey Univ, Coll Sci, Inst Nat Resources, Palmerston North, New ZealandCruz-Castillo, JG, Univ Autonoma Chapingo, Ctr Reg Univ Oriente, Aptdo 49, Hatusco 94100, Veracruz, Mexico TI - Bioregulator and seed effects on the growth of kiwifruit inner pericarp tissue cultured in vitro AB - The influence of seeds and exogenous plant bioregulators on the growth of Actinidia deliciosa (A. Chev) C.F. Liang et A.R. Ferguson var deliciosa was studied in fruit inner pericarp cultured in vitro. The growth response to 2,4-D (2,4-dichlorophenoxyacetic acid; 5 muM) + GA(3) (gibberellic acid; 40 muM) + ABA (abscisic acid; 1 or 10 muM) was significantly increased when seeds were present. BAP (6-benzylaminopurine; 20 muM); GA(3) + BAP; and ABA (abscisic acid; 1 or 10 muM) did not stimulate callus growth. 2,4-D used individually or mixed with GA(3) or BAP promoted callus growth. GA(3) used alone also induced callus growth. A mixture of 2,4-D + GA(3) and/or BAP always increased callus growth in the presence or absence of ABA. In general the data supported the view that unknown factors from the seed interact with known bioregulators to promote fruit growth MH - Mexico|Veracruz MH - New Zealand PB - PISA 56100: IST CHIMICA AGRARIA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Soil Science U5 - J;Article AV - English IS - 0002-1857 UR - ISI:000183126400001 L2 - ACTINIDIA-DELICIOSA; CYTOKININS; SENESCENCE SO - Agrochimica 2003 ;47(1-2):1-8 7776 UI - 9594 AU - Cruz-Gandarilla F AU - Morales-Acevedo A AU - Vigil O AU - Hesiquio-Garduno M AU - Vaillant L AU - Contreras-Puente G AD - IPN, Secc Elect Estado Solido, Dept Ingn Elect, CINVESTAV, Mexico City 07360, DF, MexicoUniv Havana, Fac Fis, IMRE, Havana 43100, CubaMorales-Acevedo, A, IPN, Secc Elect Estado Solido, Dept Ingn Elect, CINVESTAV, Mexico City 07360, DF, Mexico TI - Micro-structural characterization of annealed cadmium-zinc oxide thin films obtained by spray pyrolysis AB - The structural properties of annealed (ZnO)(x), (CdO)(1-x) thin films are studied by x-ray diffraction methods. The films were obtained by spray pyrolysis using different values for the nominal composition (x), and then they were annealed at 450 degreesC from 0 to 120 min. The structural analysis confirms previous results on the formation of a homogeneously mixed oxide semiconductor, but in which crystalline and amorphous phases co-exist for both CdO and ZnO. In this work, we show that for annealed films there is a strong interaction between the amorphous, the hexagonal ZnO and the cubic CdO phases regarding the lattice constants and the crystallite growth rate. In the annealed films, for x < 0.5 the optical behavior is mainly controlled by the CdO phase, so that there is a reduction of the effective band-gap of the material when the CdO crystallite size is increased, possibly due to grain size effects. On the other hand, for x > 0.5 the band-gap behavior is mainly determined by the variation of the ZnO crystallite lattice parameters and the relative volumetric concentration of amorphous and crystalline ZnO in the film. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000179839900041 L2 - micro-structural characterization;cadmium-zinc oxides;thin films;optical properties SO - Materials Chemistry and Physics 2003 ;78(3):840-846 7777 UI - 9550 AU - Cruz-Garcia F AU - Hancock CN AU - McClure B AD - Univ Missouri, Dept Biochem, Columbia, MO 65211, USANatl Autonomous Univ Mexico, Fac Quim, Dept Biochem, Mexico City 04510, DF, MexicoMcClure, B, Univ Missouri, Dept Biochem, 117 Schweitzer Hall, Columbia, MO 65211 USA TI - S-RNase complexes and pollen rejection AB - Biochemical interactions between the pollen and the pistil allow plants fine control over fertilization. S-RNase-based pollen rejection is among the most widespread and best understood of these interactions. At least three plant families have S-RNase-based self-incompatibility (SI) systems, and S-RNases have also been implicated in interspecific pollen rejection. Although S-RNases determine the specificity of SI, other genes are required for the pollen rejection system to function. Progress is being made toward identifying these non-S-RNase factors. HT-protein, first identified as a non-S-RNase factor that was required for SI in Nicotiana alata, has now been implicated in other species as well. In addition, several pistil proteins bind to S-RNase in vitro. One hypothesis is that S-RNase forms a complex with these proteins in vivo that is the active form of S-RNase in pollen rejection MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 17 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000179865500014 L2 - interspecific incompatibility;pollen-pistil interactions;self-incompatibility;S-locus;S-RNase;LOCUS RECEPTOR KINASE; BRASSICA SELF-INCOMPATIBILITY; NICOTIANA-ALATA; UNILATERAL INCOMPATIBILITY; PETUNIA-INFLATA; SEQUENCE VARIABILITY; FLOWERING PLANTS; PROTEINS; GLYCOPROTEIN; EXPRESSION SO - Journal of Experimental Botany 2003 ;54(380):123-130 7778 UI - 9371 AU - Cruz-Orea A AU - Bentefour EH AU - Jamee P AU - Chirtoc M AU - Glorieux C AU - Pitsi G AU - Thoen J AD - Katholieke Univ Leuven, Dept Nat Kunde, Lab Akoestiek & Therm Fys, B-3001 Louvain, BelgiumCruz-Orea, A, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07300, DF, Mexico TI - Thermal characterization of starch-water system by photopyroelectric technique and adiabatic scanning calorimetry AB - Starch is one of the most important carbohydrate sources in human nutrition. For the thermal analysis of starch, techniques such as differential scanning calorimetry have been extensively used. As an alternative, we have applied a photopyroelectric (PPE) configuration and adiabatic scanning calorimetry (ASC) to study the thermal properties of starch-water systems. For this study we used nixtamalized corn flour and potato starch with different quantities of distilled water, in order to obtain samples with different moisture content. By using PPE and ASC methods we have measured, for each technique separately, the heat capacity by unit volume (rhoc(p)) at room temperature for a corn flour sample at 90% moisture. The obtained values agree within experimental uncertainty. By using these techniques we also studied the thermal behavior of potato starch, at 80% moisture, in the temperature range where phase transitions occur. In this case the PPE signal phase could be used as a sensitive and versatile monitor for phase transitions. (C) 2003 American Institute of Physics MH - Belgium MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000180451900154 L2 - PHASE-TRANSITIONS SO - Review of Scientific Instruments 2003 ;74(1):818-821 7779 UI - 6567 AU - Cruz-Perez FA AU - Hernandez-Valdez G AU - Ortigoza-Guerrero L AD - CINVESTAV, IPN, Commun Sect, Mexico City 07360, DF, MexicoUAM A, Dept Elect, Mexico City 02200, DF, MexicoWFI, San Diego, CA 92121, USACruz-Perez, FA, CINVESTAV, IPN, Commun Sect, Mexico City 07360, DF, Mexico TI - Performance evaluation of mobile wireless communication systems with link adaptation AB - The performance of key quality-of-service metrics for mobile cellular systems with link adaptation is evaluated by means of a teletraffic analysis. To our knowledge, no similar analysis considering link adaptation exists in the literature. In particular, novel mathematical expressions for inter-cell handoff call arrival rate, intracell handoff failure, and forced termination probabilities are derived MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Telecommunications U5 - J;Article AV - English IS - 1089-7798 UR - ISI:000187710200007 L2 - forced termination probability;link adaptation;radio resource management;teletraffic analysis;CHANNEL ASSIGNMENT; HALF-RATE; GSM SO - Ieee Communications Letters 2003 ;7(12):587-589 7780 UI - 6853 AU - Cruz-Perez FA AU - Ortigoza-Guerrero L AD - IPN, CINVESTAV, Dept Elect Engn, Commun Sect, Mexico City 07360, DF, MexicoBridge Pointe Corp Ctr, WFI, San Diego, CA 92121, USACruz-Perez, FA, IPN, CINVESTAV, Dept Elect Engn, Commun Sect, Av IPN 2508,Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Equal resource sharing allocation with QoS differentiation for conversational services in wireless communication networks AB - Flexible resource allocation (FRA) strategies are used in cellular systems to dynamically adjust the quality of service (QoS) of active calls according to the prevailing traffic conditions. This is done by assigning a variable number of resources to active calls. When the offered load is high, a small number of resources is assigned to offer high capacity while providing a QoS lower than the maximum requested. When the offered load is low, the opposite occurs. A new flexible resource allocation strategy called equal resource sharing allocation with differentiated QoS (ERSAQoS) is presented. This strategy is suitable for operation in environments with integrated conversational services (i.e. voice, video, videophone) each with different QoS and priorities. ERSAQoS consists of a two-phase allocation process. Resources are first distributed among different active calls with the same service type, respecting priorities, and then equally distributed among active calls with the same service type. The proposed strategy allows fine or soft control of differentiated QoS provisioning. Results show that ERSAQoS meets the upper capacity bound for FRA strategies while improving the QoS of the prioritised types of service MH - Mexico|Distrito Federal MH - USA PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1350-2425 UR - ISI:000186753300015 SO - Iee Proceedings-Communications 2003 ;150(5):391-398 7781 UI - 7567 AU - Cruz ILL AU - van Willigenburg LG AU - van Straten G AD - Univ Wageningen & Res Ctr, Syst & Control Grp, NL-6708 PA Wageningen, NetherlandsCruz, ILL, Univ Autonoma Chapingo, Postgrado Ingn Agr, KM 38-5 Carretera Mexico Texcoco, Mexico City 56230, DF, Mexico TI - Optimal control of nitrate in lettuce by a hybrid approach: differential evolution and adjustable control weight gradient algorithms AB - Since high concentration levels of nitrate in lettuce and other leafy vegetables are undesirable, cultivation of lettuce according to specified governmental regulations is currently an important issue. Therefore, methods are sought in order to produce a lettuce crop that allow maximization of the profits of the grower while at the same time insuring the quality of the crops. Using a two-state dynamic lettuce model that predicts the amount of nitrate at harvest time, an optimal control problem with terminal constraints is formulated. The situation considered may be relevant in a plant factory where a fixed head weight should be reached in fixed time while minimizing light input. First, optimal trajectories of light, CO2 and temperature are calculated using the adjustable control weight (ACW) gradient method. Subsequently, novel, efficient and modified differential evolution (DE) algorithms are used to obtain an approximate solution to the same optimal control problem. While the gradient method yields a more accurate result, the optimum may be local. In order to exploit the salient characteristics of a DE algorithm as a global direct search method, a hybrid-combined approach is proposed. An approximate solution obtained with a DE algorithm is used to initialize the ACW gradient method. Although local minima did not seem to occur in this particular case, the results show the feasibility of this approach. (C) 2003 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Computer Science, Interdisciplinary Applications U5 - J;Article AV - English IS - 0168-1699 UR - ISI:000185173100013 L2 - optimal control;artificial intelligence;differential evolution;global optimization;gradient method;lettuce growth;nitrate content;OPTIMIZATION SO - Computers and Electronics in Agriculture 2003 ;40(1-3):179-197 7782 UI - 7382 AU - Cruz SA AU - Gamaly EG AU - Chadderton LT AU - Fink D AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoAustralian Natl Univ, Inst Adv Studies, Res Sch Phys Sci & Engn, Dept Appl Math, Canberra, ACT 0200, AustraliaHahn Meitner Inst Berlin GmbH, D-14109 Berlin, GermanyCruz, SA, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - A simple model for latent track formation due to cluster ion stopping and fragmentation in solids AB - An estimate of the electronic stopping of a swift cluster ion during different stages of penetration in a given material is presented. We take a simplified approach to the stopping process by neglecting vicinage effects on the stopping cross section as well as spatial distortion due to Coulomb forces among ions. The different stages of penetration and energy loss arc based on the hypothesis of formation of a transient plasma (the plasma stopping regime)-due to the release of energetic electrons from the target material-within and around the spatial region defined by the Correlated positions of each cluster constituent ion (atom). The density of the transient plasma is treated as a function of the rate of energy deposition and depth up to a point where the rate of energy deposition yields a threshold value where the ejected target electrons immediately recombine so that stopping in a cold target begins (conventional stopping regime) and where the cluster constituent ions start being neutralized according to a charge equilibration scheme as depicted by the effective charge relation of Betz. The model is applied to the stopping of 40.2 MevC(60)(3+) projectiles penetrating an Yttrium-Iron Garnet (YIG) target. Also, in this case, a possible explanation for the experimentally observed cluster-fragmentation events at a certain depth is presented. (C) 2003 Elsevier Ltd. All rights reserved MH - Australia MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000185503400025 L2 - cluster stopping;cluster fragmentation;latent tracks;FAST HEAVY-IONS; ENERGY-LOSS; C-60 CLUSTERS; CHARGE STATES; DENSE-PLASMA; POWER SO - Radiation Measurements 2003 ;36(1-6):145-149 7783 UI - 8888 AU - Cruz SL AU - Gauthereau MY AU - Camacho-Munoz C AU - Lopez-Rubalcava C AU - Balster RL AD - IPN, Dept Farmacobiol, CINVESTAV, Mexico City 14330, DF, MexicoVirginia Commonwealth Univ, Med Coll Virginia, Dept Pharmacol & Toxicol, Richmond, VA 23298, USACruz, SL, IPN, Dept Farmacobiol, CINVESTAV, Calzada Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Effects of inhaled toluene and 1,1,1-trichloroethane on seizures and death produced by N-methyl-D-aspartic acid in mice AB - Evidence exists that some abused solvents have N-methyl-D-aspartic acid (NMDA) antagonist activity, although which of their effects may be related to this mechanism is not well understood. The effects of toluene and 1,1,1-trichloroethane (TCE) on NMDA-induced seizures in mice were studied using three experimental protocols: (a) animals injected i.p. with 120 or 170 mg/kg NMDA and immediately afterwards exposed to solvent vapors or air for 30 min (co-exposure protocol); (b) mice exposed for 30 min to solvent or air, then injected with NMDA and placed in the chamber for a second 30-min exposure (pre-exposure + co-exposure protocol); and (c) mice that inhaled 4000 ppm toluene or air for 30 min twice a day, 6 h apart, for 7 days, and were injected with 120 mg/kg NMDA immediately before a 30-min toluene exposure (repeated exposure protocol). When given acutely, toluene, but not TCE, produced concentration-dependent protection against NMDA-induced seizures. Higher concentrations of toluene were also effective against the lethal effects produced by 170 mg/kg NMDA. Clearer effects were seen when the pre-exposure + co-exposure protocol was followed. Under these conditions the IC50 for toluene was 739 ppm (653-825) against seizure occurrence and 2127 ppm (1966-2288) against lethality. Repeated exposure to toluene did not result in tolerance to its anticonvulsant effects. These results are consistent with the in vitro effects described for toluene as a noncompetitive NMDA antagonist and as a compound that enhances GABAergic transmission. The lack of protective effects of TCE is not consistent with its in vitro actions. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000181718500017 L2 - toluene;trichloroethane;inhalant abuse;seizures;NMDA;drug abuse;NMDA ANTAGONISTS; EXTRACELLULAR DOPAMINE; INDUCED CONVULSIONS; XENOPUS OOCYTES; RECEPTORS; ETHANOL; ABUSE; ANTICONVULSANT; INHALATION; HALOTHANE SO - Behavioural Brain Research 2003 ;140(1-2):195-202 7784 UI - 7641 AU - Cuellar EL AU - Guenin G AU - Morin M AD - Inst Natl Sci Appl, CNRS, UMR 5510, GEMPPM, F-69621 Villeurbanne, FranceUniv Autonoma Nuevo Leon, FIME, San Nicolas de los Garza 66450, NL, MexicoGuenin, G, Inst Natl Sci Appl, CNRS, UMR 5510, GEMPPM, Bat502,20 Ave Einstein, F-69621 Villeurbanne, France TI - Study of the stress-assisted two-way memory effect of a Ti-Ni-Cu alloy using resistivity and thermoelectric power techniques AB - The stress-assisted two-way memory effect has been studied for successive cycles in a Ti-Ni-Cu alloy for two different thermomechanical treatments: recovery annealed (TT425) and fully recrystallized. Simultaneous tensile strain and electrical resistance measurements have been performed as a function of temperature and for different applied stresses. The thermoelectric power (TEP) in the stressed martensitic state has also been measured. For the treatment TT425 corresponding to 30% cold drawing followed by 425 degreesC annealing, a stable reversible strain epsilon(m-beta) of 4.5% at maximum is found. A relatively low plastic strain epsilon(p) occurs for stresses above 125 MPa, which increases with the number of thermal cycles. For the recrystallized treatment, the maximum amplitude of the reversible strain is almost the same but a quite large plastic strain occurs even at 50 MPa and strongly increases with the number of cycles, reaching 12% for 20 cycles at 200 MPa. It is shown that the electrical resistivity change, associated with the reverse transformation, increases linearly with the reversible strain epsilon(m-beta). This effect is related to the electrical resistivity anisotropy of the martensite, with the slope being slightly different for the two treatments. In addition, the resistivity is relatively insensitive to the plastic strain. The TEP and the resistivity are sensitive to the orientation of the martensite, but the TEP also strongly depends on the plastic strain. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Nuevo Leon PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000184845800046 L2 - Ti-Ni based alloys;shape memory alloys;stress-assisted two-way memory;electrical resistivity;thermoelectric power;BEHAVIOR SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2003 ;358(1-2):350-355 7785 UI - 8498 AU - Cuesta HJM AU - Penna-Firm AU - Perez-Lorenzana A AD - Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyCtr Brasileiro Pesquisas Fis, Lab Cosmol & Fis Expt Altas Energias, BR-22290180 Rio De Janeiro, BrazilCtr Latinoamer Fis, Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Fac Educ, BR-22290180 Rio De Janeiro, BrazilInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoCuesta, HJM, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - Charge asymmetry in the brane world and the formation of charged black holes AB - In theories with an infinite extra dimension, free particles localized on the brane can leak out to the extra space. We argue that if there were color confinement in the bulk, electrons would be more able to escape than quarks and protons (which are composed states). Thus, this process generates an electric charge asymmetry on brane matter densities. A primordial charge asymmetry during the big bang nucleosynthesis era is predicted. We use current bounds on this and on electron disappearance to constrain the parameter space of these models. Although the generated asymmetry is generically small, it could be particularly enhanced on large densities as in astrophysical objects, such as massive stars. We suggest the possibility that such an accumulation of charge may be linked, upon supernova collapse, to the formation of a charged black hole and the generation of gamma-ray bursts MH - Brazil MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000182728200110 L2 - MATTER; DIMENSIONS; UNIVERSE SO - Physical Review D 2003 ;67(8): 7786 UI - 7998 AU - Cueto-Manzano AM AU - Konel S AU - Crowley V AU - France MW AU - Freemont AJ AU - Adams JE AU - Mawer B AU - Gokal R AU - Hutchison AJ AD - Hosp Especialidades Ctr Med La Raza, Unidad Invest Medi & Epidemiol Clin, CMNO, IMSS, Guadalajara 44320, Jalisco, MexicoManchester Royal Infirm, Dept Renal Med, Manchester M13 9WL, Lancs, EnglandManchester Royal Infirm, Dept Clin Biochem, Manchester M13 9WL, Lancs, EnglandUniv Manchester, Sch Med, Dept Osteopathol, Manchester, Lancs, EnglandUniv Manchester, Sch Med, Dept Diagnost Radiol, Manchester, Lancs, EnglandUniv Manchester, Sch Med, Dept Med, Manchester, Lancs, EnglandCueto-Manzano, AM, Hosp Especialidades Ctr Med La Raza, Unidad Invest Medi & Epidemiol Clin, CMNO, IMSS, 4 Piso,Belisario Domingues 1000,Col Ind, Guadalajara 44320, Jalisco, Mexico TI - Bone histopathology and densitometry comparison between cyclosporine A monotherapy and prednisolone plus azathioprine dual immunosuppression in renal transplant patients AB - Background. No study has compared the bone histopathologic findings in renal transplant patients receiving cyclosporine A (CsA) monotherapy with those in patients receiving a non-CsA regimen. The aim of this study was to compare bone densitometry and histomorphometry findings in patients receiving CsA monotherapy versus those receiving azathioprine + prednisolone dual therapy. Methods. A bone biopsy and densitometry were performed in 13 patients receiving CsA monotherapy and 12 patients receiving azathioprine + prednisolone, who had been on these regimens since the time of transplantation. Fourteen men and 11 women, age 51+/-12 years, with 140+/-75 months since transplantation, were included. Results. A low bone mineral density (BMD) was observed in patients on both immunosuppressive schemes-most notably at the distal radius and less significantly at the lumbar spine. No significant differences in BMD were observed between immunosuppressive groups. Histopathologic analysis of the group as a whole revealed mixed uremic bone disease in 42%, adynamic bone in 29%, hyperparathyroid disease in 17%, and normal bone in 12%. Patients showed a slight increase in osteoclast number and function, decreased osteoblast number and function, and retardation of dynamic parameters. No differences in histopathologic diagnosis or histomorphometric findings were observed between the immunosuppressive therapy groups. In addition to the immunosuppressive drugs, male gender and old age negatively affected bone mass. Conclusions. Both prednisolone and CsA were associated with slight osteoclast stimulation and osteoblast suppression and marked retardation of mineral apposition and bone formation rates. Both drugs were also associated with reduced BMD at the axial and appendicular skeleton, even though a nonsignificant trend to a better-preserved lumbar spine BMD was observed in the CsA group MH - United Kingdom MH - Mexico|Jalisco PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Immunology;Surgery;Transplantation U5 - J;Article AV - English IS - 0041-1337 UR - ISI:000183910400024 L2 - MINERAL DENSITY; KIDNEY-TRANSPLANTATION; RECEIVING CYCLOSPORIN; RECIPIENTS; RESORPTION; HISTOLOGY; REGIMENS; HORMONE; INVITRO; MOUSE SO - Transplantation 2003 ;75(12):2053-2058 7787 UI - 8169 AU - Cuevas-Yanez E AU - Garcia MA AU - de la Mora MA AU - Muchowski JM AU - Cruz-Almanza R AD - UNAM, Inst Quim, Mexico City 04510, DF, MexicoRoche Palo Alto, Palo Alto, CA 94304, USACruz-Almanza, R, UNAM, Inst Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Novel synthesis of alpha-diazoketones from acyloxyphosphonium salts and diazomethane AB - A novel. simple and mild method to prepare alpha-diazoketones from carboxylic acids is presented. The procedure involves the reaction of carboxylic acids with triphenylphosphine/NBS and Subsequent treatment with diazomethane. C-13 and P-31 NMR experiments demonstrate that the process occurs through an acyloxyphosphonium salt as a key intermediate. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000183608600001 L2 - CARBOXYLIC-ACIDS; ESTERIFICATION; ACETATE; FACILE; SYSTEM; AMIDES; MILD SO - Tetrahedron Letters 2003 ;44(26):4815-4817 7788 UI - 7702 AU - Cuevas R AU - Ramirez J AU - Busca G AD - UNAM, Fac Quim, UNICAT, Dept Ingn Quim, Mexico City 04510, DF, MexicoUniv Genoa, Dipartimento Ingn Chim & Proc, Lab Chim Superfici & Catalisi Ind, I-16129 Genoa, ItalyRamirez, J, UNAM, Fac Quim, UNICAT, Dept Ingn Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Fluoride modification of Mo/Al2O3 catalysts characterization of the changes induced in support and Mo phases AB - The characterization of fluoride-modified Mo/Al2O3 catalysts was performed in order to investigate on the effect that low levels of fluoridation of the alumina support (0-2.0 wt.%) cause on the support itself and on the supported Mo oxide and sulfide phases. Fluoride-modified Al-2-O-3 supports and Mo/Al-2-O-3 catalysts where characterized by nitrogen physisorption, scanning electronic microscopy (SEM-EDX), isoelectric point (IEP), Fourier transform infrared spectroscopy (FT-IR), infrared spectroscopy of adsorbed CO2 (IR-CO2) and temperature programmed reduction (TPR). The dispersion of the sulfided catalysts was estimated by dynamic NO chemisorption. The results indicate that the different hydroxyl types present on the alumina surface react to a different extent with fluoride and that it is the most basic hydroxyl groups that are titrated first. The consumption of the alumina OH by F-, inhibits, during the deposition of Mo, the formation of tetrahedral molybdenum oxide species in strong interaction with the support, leading to an increased number of polymeric octahedral Mo surface species. The NO adsorption results put in evidence a drop in the dispersion of the MOS2 phase present in the sulfided samples. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-1139 UR - ISI:000184654600002 L2 - fluoride-modified alumina;hydrodesulfurization;Mo/Al2O3 catalysts;GAMMA-ALUMINA CATALYSTS; FLUORINATED HYDROTREATMENT CATALYSTS; ACID SITES; HYDRODESULFURIZATION ACTIVITY; SKELETAL ISOMERIZATION; NIW/AL2O3 CATALYSTS; SURFACE-PROPERTIES; PROMOTED ALUMINA; NICKEL-CATALYSTS; FT-IR SO - Journal of Fluorine Chemistry 2003 ;122(2):151-158 7789 UI - 6595 AU - cuna-Askar K AU - Englande AJ AU - Ramirez-Medrano A AU - Coronado-Guardiola JE AU - Chavez-Gomez B AD - Univ Autonoma Nuevo Leon, Fac Med, Lab Biorremediac Ambiental, Monterrey, Nuevo Leon, MexicoTulane Univ, Med Ctr, Sch Publ Hlth & Trop Med, Dept Environm Hlth Sci, New Orleans, LA 70112, USAInst Mexicano Petr, Delegac Gustavo A Madero, Mexico City 07730, DF, MexicoAcuna-Askar, K, Univ Autonoma Nuevo Leon, Fac Med, Lab Biorremediac Ambiental, Apdo Postal 1563, Monterrey, Nuevo Leon, Mexico TI - Evaluation of biomass production in unleaded gasoline and BTEX-fed batch reactors AB - BTEX removal under aerobic conditions by unleaded gasoline acclimated biomass and BTEX acclimated biomass, and the effect of surfactant on BTEX biodegradation were evaluated. The effect of BTEX concentration as the sole source of carbon for biomass acclimation and the effect of yeast extract on cell growth in unleaded gasoline-fed reactors were also evaluated. For the unleaded gasoline acclimated biomass, benzene was shown the most recalcitrant among all BTEX, followed by o-xylene and toluene with 16-23%, 35-41 % and 57-69% biodegradation, respectively. Ethylbenzene was consistently the fastest BTEX chemical removed with 99% biodegradation for the four bioreactor acclimated biomasses tested. For the 1,200 ppm BTEX acclimated biomass, benzene showed the highest removal efficiency (99%) among the four biomass environmental conditions tested, along with 99% toluene and 99% ethylbenzene biodegradation. O-xylene showed 92-94% removal. In all bioassays tested Tergitol NP-10 was fully removed, and did not have a substantial effect on BTEX biodegradation at the end of a 10-day evaluation MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000187431000017 L2 - batch reactors;biodegradation;biomass acclimation;BTEX;unleaded gasoline;BUTYL ETHER MTBE; BIODEGRADATION; GROUNDWATER SO - Water Science and Technology 2003 ;48(8):127-133 7790 UI - 9470 AU - Curiel S AU - Girart JM AU - Rodriguez LF AU - Canto J AD - Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainAstron Inst, Morelia 58190, Michoacan, MexicoCuriel, S, Univ Nacl Autonoma Mexico, Astron Inst, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Very Large Array observations of proper motions in YLW 15 AB - Using high angular resolution (similar to0".3) Very Large Array (VLA) observations made at 3.6 cm during the period from 1990 to 2002, we report the detection of proper motions in the components of the binary source YLW 15. The absolute proper motions observed in these two protostars, of the order of 26 mas yr(-1),or 15 km s(-1) at a distance of 120 pc, are very similar in magnitude and direction to those of another protostar and of T Tauri stars in the same region and are attributed to the large-scale motions of the parent molecular complex. The relative astrometry between the two components (separated by similar to0".6) reveals orbital proper motions that suggest that a lower limit to the total mass and an upper limit to the period of the binary system are similar to1.7 M-circle dot and 360 yr, respectively. The results also suggest that VLA 1 is more massive than VLA 2 MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000180282800012 L2 - astrometry;ISM : jets and outflows;stars : individual (YLW 15);YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; OPHIUCHI CLOUD; IRAS OBSERVATIONS; PROTOSTAR; CLUSTER SO - Astrophysical Journal 2003 ;582(2):L109-L113 7791 UI - 7528 AU - Czekala N AU - McGeehan L AU - Steinman K AU - Li XB AU - Gual-Sil F AD - Zool Soc San Diego, Ctr Reprod Endangered Species, San Diego, CA 92112, USAChengdu Giant Panda Breeding Ctr, Chengdu, Peoples R ChinaChapultapec Zoo, Mexico City, DF, MexicoCzekala, N, Zool Soc San Diego, Ctr Reprod Endangered Species, POB 120551, San Diego, CA 92112 USA TI - Endocrine monitoring and its application to the management of the giant panda AB - Urinary estrogens (n=10) and progestins (n=4) were monitored in a total of 10 giant panda females. Estrogens were evaluated with two different immunoassays during the estrous period. The two different methodologies gave similar hormonal profiles, but different quantitative results due to differences in the crossreactivity of the different assay systems. High-pressure liquid chromatography (HPLC) analysis of peak estrogen urine revealed that estrone sulfate was the major component, and estrone glucuronide was a minor component (97:3). A comparison of days of insemination in females that conceived and delivered offspring showed a correlation to insemination on days I and 2 post-estrogen peak. An analysis of urinary progestins revealed that they were elevated over baseline concentrations following the estrogen surge during estrus (P < 0.0004). (C) 2003 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 4 U4 - Veterinary Sciences;Zoology U5 - J;Article AV - English IS - 0733-3188 UR - ISI:000185104700009 L2 - giant panda;estrogen;progestins;urinary hormones;RIA;EIA;AILUROPODA-MELANOLEUCA; ENZYME-IMMUNOASSAY; PREGNANCY; ESTRUS; PROGESTERONE; METABOLITES; EXCRETION SO - Zoo Biology 2003 ;22(4):389-400 7792 UI - 9139 AU - D'Olivo JC AU - Nieves JF AU - Sahu S AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Puerto Rico, Dept Phys, Theoret Phys Lab, Rio Piedras, PR 00931, USAD'Olivo, JC, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior,CU,A Postal 70-543, Mexico City 04510, DF, Mexico TI - Field theory of the photon self-energy in a medium with a magnetic field and the Faraday effect AB - A convenient and general decomposition of the photon self-energy in a magnetized, but otherwise isotropic, medium is given in terms of the minimal set of tensors consistent with the transversality condition. As we show, the self-energy in such a medium is completely parametrized in terms of nine independent form factors, and they reduce to three in the long wavelength limit. We consider in detail an electron gas with a background magnetic field, and, using finite temperature field theory methods, we obtain the one-loop formulas for the form factors, which are exact to all orders in the magnetic field. Explicit results are derived for a variety of physical conditions. In the appropriate limits, we recover the well-known semiclassical results for the photon dispersion relations and the Faraday effect. In more general cases, where the semiclassical treatment or the linear approximation (weak-field limit) are not applicable, our formulas provide a consistent and systematic way for computing the self-energy form factors and, from them, the photon dispersion relations MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000181015700080 L2 - POLARIZATION SO - Physical Review D 2003 ;67(2): 7793 UI - 9536 AU - D'Onghia E AU - Firmani C AU - Chincarini G AD - Univ Milan, Milan, ItalyMax Planck Inst Astron, D-69117 Heidelberg, GermanyOsservatorio Astron Brera Merate, I-23807 Merate, LC, ItalyUNAM, Astron Inst, Mexico City 04510, DF, MexicoUniv Milan, I-20126 Milan, ItalyD'Onghia, E, Univ Milan, Via Celoria 16, Milan, Italy TI - The halo density profiles with non-standard N-body simulations AB - We propose a new numerical procedure to simulate a single dark halo of any size and mass in a hierarchical framework coupling the extended Press-Schechter formalism (EPSF) to N -body simulations. The procedure consists of assigning cosmological initial conditions to the particles of a single halo with the EPSF technique and following only the dynamical evolution using a serial N-body code. The computational box is fixed with a side of 0.5 h (-1)Mpc. This allows us to simulate galaxy cluster haloes using appropriate scaling relations, to ensure savings in computing time and code speed. The code can describe the properties of haloes composed of collisionless or collisional dark matter. For collisionless cold dark matter particles, the Navarro-Frenk-White profile is reproduced for galactic haloes as well as galaxy cluster haloes. Using this numerical technique, we study some characteristics of haloes assumed to be isolated or placed in a cosmological context in the presence of weak self-interacting dark matter: the soft core formation and the core collapse. The self-interacting dark matter cross-section per unit mass is assumed to be inversely proportional to the particle collision velocity: sigma/m(x) proportional to 1 v MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000179912000019 L2 - galaxies : haloes;cosmology : miscellaneous;dark matter;COLD DARK-MATTER; SURFACE BRIGHTNESS GALAXIES; RESOLUTION ROTATION CURVES; EVOLUTION; COLLAPSE; PHYSICS SO - Monthly Notices of the Royal Astronomical Society 2003 ;338(1):156-164 7794 UI - 9021 AU - D'Suze G AU - Moncada S AU - Gonzalez C AU - Sevcik C AU - Aguilar V AU - Alagon A AD - Inst Venezolano Invest Cient, Lab Neurofarmacol Celular, Biochem & Biophys Ctr, Caracas 1020A, VenezuelaUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62191, Morelos, MexicoD'Suze, G, Inst Venezolano Invest Cient, Lab Neurofarmacol Celular, Biochem & Biophys Ctr, Apdo 21827, Caracas 1020A, Venezuela TI - Relationship between plasmatic levels of various cytokines, tumour necrosis factor, enzymes, glucose and venom concentration following Tityus scorpion sting AB - A sandwich enzyme-linked immunosorbent assay was developed for measuring Tityus venom levels in plasma. The method proved capable of distinguishing patients with only local symptoms from controls, and was used to quantify venom in 205 accidental human envenomations. Our results show that the severity of envenoming is related to the patient plasma venom concentration. This depends on time elapsed between the sting and when the plasma was drawn. We observed that 46 and 49% of patients with moderate to severe symptoms (MS, n = 41) showed hyperamylasemia and hyperglycemia, respectively. In addition, 39% of cases with MS symptoms had partial thromboplastin time values prolonged or shorted and 6.5% of patients with local symptoms (LS, n = 164) had only prolonged prothrombin time values. Interleukin6 (IL6) increased significantly in patients with MS symptoms. IL6 values increased with hyperamylasemia, envenoming severity and time hyperamylasemia. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000181251700014 L2 - Tiytus discrepans;cytokines;immunosorbent assay;INFLAMMATORY RESPONSE SYNDROME; RESPIRATORY-DISTRESS-SYNDROME; LINKED-IMMUNOSORBENT-ASSAY; OCCITANUS-TUNETANUS BOT; ACUTE-PANCREATITIS; SNAKE-VENOM; LEIURUS-QUINQUESTRIATUS; SERRULATUS VENOM; ELISA; PHARMACOKINETICS SO - Toxicon 2003 ;41(3):367-375 7795 UI - 9392 AU - Dadgar A AU - Poschenrieder M AU - Blasing J AU - Contreras O AU - Bertram F AU - Riemann T AU - Reiher A AU - Kunze M AU - Daumiller I AU - Krtschil A AU - Diez A AU - Kaluza A AU - Modlich A AU - Kamp M AU - Christen J AU - Ponce FA AU - Kohn E AU - Krost A AD - Otto Von Guericke Univ, IEP, FNW, D-39016 Magdeburg, GermanyArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAUniv Ulm, Dept Electron Devices & Circuits, D-89069 Ulm, GermanyGlobal Light Ind GmbH, D-47475 Kamp Lintfort, GermanyUNAM, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoDadgar, A, Otto Von Guericke Univ, IEP, FNW, Postfach 4120, D-39016 Magdeburg, Germany TI - MOVPE growth of GaN on Si(111) substrates AB - Metalorganic chemical vapor phase deposition of thick, crack-free GaN on Si can be performed either by patterning of the substrate and Selective growth or by low-temperature (LT) AlN interlayers enabling very thick GaN layers. A reduction in dislocation density from 10 to 10(9) cm(-2), is observed for LT-AlN interlayers which can be further improved using monolayer thick, SixNy in situ masking and subsequent lateral overgrowth. Crack-free AlGaN/GaN transistor structures show high room temperature mobilities of 1590 cm(2) Vs at 6.7 (.) 10(12) cm(2) sheet carrier concentration. Thick crack-free light emitters have a maximum output power of 0,42 mW at 498 11111 and 20 mA. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000180446900103 L2 - Si(111) substrates;metalorganic vapor phase epitaxy;GaN;CHEMICAL-VAPOR-DEPOSITION; LIGHT-EMITTING-DIODES; HIGH-QUALITY GAN; ALGAN/ALN INTERMEDIATE LAYER; SINGLE CRYSTALLINE GAN; SI-SUBSTRATE; PHASE EPITAXY; LATERAL OVERGROWTH; STRESS; FILMS SO - Journal of Crystal Growth 2003 ;248():556-562 7796 UI - 6865 AU - Daily GC AU - Ceballos G AU - Pacheco J AU - Suzan G AU - Sanchez-Azofeifa A AD - Stanford Univ, Dept Biol Sci, Ctr Conservat Biol, Stanford, CA 94305, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Alberta, Dept Earth & Atmospher Sci, Earth Observ Syst Lab, Edmonton, AB T6G 2E3, CanadaDaily, GC, Univ New Mexico, Dept Biol, Albuquerque, NM 87131, USA TI - Countryside biogeography of neotropical mammals: Conservation opportunities in agricultural landscapes of Costa Rica AB - The future of mammalian diversity in the tropics depends largely on the conservation value of human-dominated lands. We investigated the distribution of non-flying mammals in five habitats of southern Costa Rica: relatively extensive forest (227 ha), coffee plantation, pasture, coffee with adjacent forest remnant (35 ha), and pasture with adjacent forest remnant (35 ha). Of the 26 native species recorded in our study plots, 9 (35%) were restricted to forest habitat, 14 (54%) occurred in both forest and agricultural habitats, and 3 (11%) were found only in agricultural habitats. Species richness and composition varied significantly with habitat type but not with distance from the extensive forest. Interestingly, small forest remnants (35 ha) contiguous with coffee plantations did not differ from more extensive forest in species richness and were richer than other agricultural habitat types. Small remnants contiguous with pasture were species-poor. When clearing started, the study region likely supported about 60 species. Since then, at least 6 species (10%), one family (4%), and one order (11%) have gone extinct locally. The species that disappeared were the largest in their families and included carnivorous (e. g., jaguar [Panthera onca]), herbivorous (e. g., Baird's tapir, [Tapirus bairdii]), and arboreal (e. g., mantled howler monkey [Alouatta palliata]) species. Although there is no substitute for native forest habitat, the majority of native, nonflying mammal species use countryside habitats. The populations of many persist even >5 km from relatively extensive forest, at least over the 40 years since forest clearance. Moreover, if hunting ceased, we expect that at least one of the locally extinct species could be reestablished in the existing landscape. Thus, there is an important opportunity to maintain and restore the diversity, abundance, and ecosystem roles of mammals in at least some human-dominated regions of the Neotropics MH - Canada MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 33 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000186869700039 L2 - BRAZILIAN ATLANTIC FOREST; RAIN-FOREST; HABITAT FRAGMENTATION; TROPICAL FOREST; BREEDING BIRDS; BIODIVERSITY; DIVERSITY; ABUNDANCE; EXTINCTION; SYSTEMS SO - Conservation Biology 2003 ;17(6):1814-1826 7797 UI - 6592 AU - dana-Gonzalez M AU - Cocho G AU - Larralde H AU - Martinez-Mekler G AD - Univ Chicago, James Franck Inst, Chicago, IL 60637, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoAldana-Gonzalez, M, Univ Chicago, James Franck Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA TI - Polymer transport in random potentials and the genetic code: The waltz of life AB - We address the question of why the translation from nucleic acids to protein forming amino acids is carried out by triplets known as codons. We approach this problem from a dynamical point of view by considering the translocation properties of primitive molecular machines operating under prebiotic conditions [1, 2, 3, 4]. Our model captures some basic ribosome-mRNA interaction features. We consider short chains of charged particles interacting with polymers via electrostatic forces, constrained to move in quasi one dimensional geometries, subject to external forcing. Our numerical and analytic studies of statistical properties of random chain/polymer potentials suggest that, under very general conditions, a dynamics is attained in which the chain moves along the polymer in steps of three monomers, traversing swiftly two monomers and lingering on the third one as in a waltz. This behavior is enhanced when we consider present day protein coding sequences. We also comment on noncoding sequences. We argue that this property could be one of the underlying causes for the three base codon structure of the genetic code MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 1424-0637 UR - ISI:000187787800036 L2 - TRANSLOCATION; MACHINES; ORIGIN SO - Annales Henri Poincare 2003 ;4():S459-S474 7798 UI - 9432 AU - dana-Gonzalez M AU - Cocho G AU - Larralde H AU - Martinez-Mekler G AD - Univ Chicago, James Franck Inst, Chicago, IL 60637, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAldana-Gonzalez, M, Univ Chicago, James Franck Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA TI - Translocation properties of primitive molecular machines and their relevance to the structure of the genetic code AB - We address the question, related with the origin of the genetic code, of why are there three bases per codon in the translation to protein process. As a follow-up to our previous work (Aldana et al., 1998, Martinez-Mekler et al., 1999a,b), we approach this problem by considering the translocation properties of primitive molecular machines, which capture basic features of ribosomal/messenger RNA interactions, while operating under prebiotic conditions. Our model consists of a short one-dimensional chain of charged particles (rRNA antecedent) interacting with a polymer (mRNA antecedent) via electrostatic forces. The chain is subject to external forcing that causes it to move along the polymer which is fixed in a quasi-one-dimensional geometry. Our numerical and analytic studies of statistical properties of random chain/polymer potentials suggest that, under very general conditions, a dynamics is attained in which the chain moves along the polymer in steps of three monomers. By adjusting the model in order to consider present-day genetic sequences, we show that the above property is enhanced for coding regions. Intergenic sequences display a behavior closer to the random situation. We argue that this s dynamical property could be one of the underlying causes for the three-base codon structure of the genetic code (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000180313000003 L2 - PROTEIN-SYNTHESIS; ORIGIN SO - Journal of Theoretical Biology 2003 ;220(1):27-45 7799 UI - 8882 AU - Dang LTN AU - Stolte WC AU - Ohrwall G AU - SantAnna MM AU - Dominguez-Lopez I AU - Schlachter AS AU - Lindle DW AD - Univ Nevada, Dept Chem, Las Vegas, NV 89154, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USACtr Natl Metrol, Qreretaro 76900, MexicoStolte, WC, Univ Nevada, Dept Chem, Las Vegas, NV 89154, USA TI - Core-level anionic photofragmentation of OCS AB - Mass spectroscopy is used to study the formation of the S-, C-, and O- anions after photoexcitation of OCS in the vicinity of the S 2p and C 1s ionization thresholds. Anions are observed both below and above these thresholds. Because anion production is known to be suppressed at core-level shape resonances, the anion measurements serve as a suggestive and complementary tool for identifying above-threshold features in OCS photoabsorption. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0301-0104 UR - ISI:000181788600005 L2 - ION-PAIR FORMATION; VACUUM ULTRAVIOLET; CONTAINING MOLECULES; PHOTOEXCITATION; SULFUR; DECAY; EXCITATION; CARBON; OXYGEN; DISSOCIATION SO - Chemical Physics 2003 ;289(1):45-49 7800 UI - 8786 AU - Danilin MY AU - Popp PJ AU - Herman RL AU - Ko MKW AU - Ross MN AU - Kolb CE AU - Fahey DW AU - Avallone LM AU - Toohey DW AU - Ridley BA AU - Schmid O AU - Wilson JC AU - Baumgardner DG AU - Friedl RR AU - Thompson TL AU - Reeves JM AD - Boeing Co, MC OR RC, Seattle, WA 98124, USANOAA, Aeron Lab, Boulder, CO 80303, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USANASA, Jet Prop Lab, Pasadena, CA 91109, USAAtmospher & Environm Res Inc, Lexington, MA, USAAerosp Corp, Los Angeles, CA 90009, USAAerodyne Res Inc, Billerica, MA 01821, USAUniv Colorado, Program Atmospher & Ocean Sci, Boulder, CO 80309, USANatl Ctr Atmospher Res, Boulder, CO 80303, USAUniv Denver, Dept Engn, Denver, CO 80208, USANatl Autonomous Univ Mexico, Ctr Atmospher Sci, Mexico City 04510, DF, MexicoDanilin, MY, Boeing Co, MC OR RC, POB 3707, Seattle, WA 98124, USA TI - Quantifying uptake of HNO3 and H2O by alumina particles in Athena-2 rocket plume AB - [1] The goal of this study is to quantify uptake of H2O and HNO3 by and estimate their residence time on alumina particles in Athena-2 rocket plumes. This study uses in situ measurements made in the lower stratosphere with the NASA WB-57F high-altitude aircraft on 24 September 1999. Constraining the Atmospheric and Environmental Research, Inc. (AER), plume model with available measurements, we found that (1) H2O uptake coefficient for alumina particles is larger than 3 x 10(-4), (2) HNO3 is produced via ClONO2 + HCl --> Cl-2 + HNO3 on alumina particles and resides on their surfaces for 5-52 min, and (3) alumina particles in the plume are covered by 100-200 monolayers of adsorbed H2O and 0.1 - 10 monolayers of HNO3 under lower stratospheric conditions. These values are uncertain by at least a factor of 2. We speculate that the H2O coverage remaining on alumina particles accelerates the ClONO2 + HCl --> Cl-2 + HNO3 reaction, thus leading to a larger than previously thought global ozone loss to solid-fueled rocket emissions, especially if at least several percent of emitted alumina mass are in submicron particles MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000182068900005 L2 - alumina particles;uptake of HNO3 and H2O;rocket emissions;STRATOSPHERIC OZONE; OXIDE; HCL; COEFFICIENTS; TROPOSPHERE; TEMPERATURE; EMISSIONS; CLONO2; IMPACT; WATER SO - Journal of Geophysical Research-Atmospheres 2003 ;108(D4): 7801 UI - 6970 AU - David GL AU - Romieu I AU - Sienra-Monge JJ AU - Collins WJ AU - Ramirez-Aguilar M AU - Del Rio-Navarro BE AU - Reyes-Ruiz NI AU - Morris RW AU - Marzec JM AU - London SJ AD - Natl Inst Environm Hlth Sci, Div Intramural Res, NIH, Dept Hlth & Human Serv, Res Triangle Pk, NC 27709, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoHosp Infantil Mexico Frederico Gomez, Mexico City, DF, MexicoDavid, GL, Natl Inst Environm Hlth Sci, Div Intramural Res, NIH, Dept Hlth & Human Serv, POB 12233,D2-01, Res Triangle Pk, NC 27709 USA TI - Nicotinamide adenine dinucleotide (phosphate) reduced: Quinone oxidoreductase and glutathione S-transferase M1 polymorphisms and childhood asthma AB - Nicotinamide adenine dinucleotide (phosphate) reduced:quinone oxidoreductase (NQO1) and glutathione S-transferase (GST) M1 are phase 11 enzymes important in response to oxidative stress, such as occurs during exposure to ozone. We examined the relationship between functionally significant polymorphisms in NQO1 (Prol187Ser) and GSTM1 (homozygous deletion) and asthma risk in children with high lifetime exposure to ozone. We enrolled children with asthma from the allergy referral clinic at a public pediatric hospital in Mexico City, together with their parents. We assayed for the Pro187Ser polymorphism in NQO1 using a polymerase chain reaction-restriction fragment length polymorphism assay and for the presence of GSTM1 by polymerase chain reaction among 218 case-parent triads. We did not find strong evidence of an association between NQO1 genotype alone and asthma risk. However, among subjects with homozygous deletion of GSTM1, carriers of a serine allele were at significantly reduced risk of asthma compared with Pro/Pro homozygotes (relative risk = 0.4; 95% confidence interval, 0.2-0.8). The p value for difference in relative risk for NQO1 by GSTM1 genotype = 0.013. These data are consistent with a protective effect of the NQO1 Ser allele in this population of GSTM1-null children with high ozone exposure MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 24 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000186562000014 L2 - case-parent triad;oxidative stress;environmental tobacco smoke;GSTMI;NQO1;DIESEL-EXHAUST PARTICLES; PURIFIED NAD(P)H-QUINONE OXIDOREDUCTASE; INDUCED LUNG INJURY; CASE-PARENT TRIADS; OXIDATIVE STRESS; DT-DIAPHORASE; ANTIOXIDANT SUPPLEMENTATION; AIR-POLLUTION; OZONE; CHILDREN SO - American Journal of Respiratory and Critical Care Medicine 2003 ;168(10):1199-1204 7802 UI - 6526 AU - Day JW AU - Arancibia AY AU - Mitsch WJ AU - Lara-Dominguez AL AU - Day JN AU - Ko JY AU - Lane R AU - Lindsey J AU - Lomeli DZ AD - Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803, USALouisiana State Univ, Sch Coast & Environm, Coastal Ecol Inst, Baton Rouge, LA 70803, USAComite Resources Inc, Zachary, LA 70791, USAInst Ecol, Programa Recursos Costeros, Xalapa 91000, Veracruz, MexicoEcosistemas & Planificat Ambiental Desarrollo Sus, Xalapa 91190, Veracruz, MexicoOhio State Univ, Sch Nat Resources, Columbus, OH 43210, USADay, JW, Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA TI - Using Ecotechnology to address water quality and wetland habitat loss problems in the Mississippi basin: a hierarchical approach AB - Human activities are affecting the environment at continental and global scales. An example of this is the Mississippi basin where there has been a large scale loss of wetlands and water quality deterioration over the past century. Wetland and riparian ecosystems have been isolated from rivers and streams. Wetland loss is due both to drainage and reclamation, mainly for agriculture, and to isolation from the river by levees, as in the Mississippi delta. There has been a decline in water quality due to increasing use of fertilizers, enhanced drainage and the loss of wetlands for cleaning water. Water quality has deteriorated throughout the basin and high nitrogen in the Mississippi river is causing a large area of hypoxia in the Gulf of Mexico adjacent to the Mississippi delta. Since the causes of these problems are distributed over the basin, the solution also needs to be distributed over the basin. Ecotechnology and ecological engineering offer the only ecologically sound and cost-effective method of solving these problems. Wetlands to promote nitrogen removal, mainly through denitrification but also through burial and plant uptake, offer a sound ecotechnological solution. At the level of the Mississippi basin, changes in farming practices and use of wetlands for nitrogen assimilation can reduce nitrogen levels in the River. There are additional benefits of restoration of wetland and riverine ecosystems, flood control, reduction in public health threats, and enhanced wildlife and fisheries. At the local drainage basin level, the use of river diversions in the Mississippi delta can address both problems of coastal land loss and water quality deterioration. Nitrate levels in diverted river water are rapidly reduced as water flows through coastal watersheds. At the local level, wetlands are being used to treat municipal wastewater. This is a cost-effective method, which results in improved water quality, enhanced wetland productivity and increased accretion. The problems in the Mississippi basin serves as an example for other watersheds in the Gulf of Mexico. This is especially important in Mexico, where there is a strong need for economical solutions to ecological problems. The Usumacinta delta-Laguna de Terminos regional ecosystem is an example where ecotechnological approaches offer realistic solutions to environmental problems. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Veracruz PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Biotechnology & Applied Microbiology U5 - J;Review AV - English IS - 0734-9750 UR - ISI:000188053400012 L2 - ecotechnology;water quality;Mississippi basin;GULF-OF-MEXICO; STOICHIOMETRIC NUTRIENT BALANCE; SEA-LEVEL RISE; WASTE-WATER; COASTAL WATERS; FRESH-WATER; HUMAN APPROPRIATION; CONTINENTAL-SHELF; FORESTED WETLAND; CLIMATE-CHANGE SO - Biotechnology Advances 2003 ;22(1-2):135-159 7803 UI - 6987 AU - Daza OS AU - Perez-Cisneros ES AU - Bek-Pedersen E AU - Gani R AD - Tech Univ Denmark, Dept Chem Engn, CAPEC, DK-2800 Lyngby, DenmarkUniv Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Mexico City 09340, DF, MexicoUniv Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla 72570, MexicoGani, R, Tech Univ Denmark, Dept Chem Engn, CAPEC, DK-2800 Lyngby, Denmark TI - Graphical and stage-to-stage methods for reactive distillation column design AB - Based on the element mass-balance concept, three graphical methods and one stage-to-stage computation method for design of reactive distillation columns have been developed. The element-based approach allows the design of reactive distillation columns by using simple tools similar to those that are typically employed for nonreactive Systems. For example, simple design methods employing reactive McCabe-Thiele- and reactive Ponchon-Savarit-type diagrams for design of reactive distillation of binary-element systems-which may be ternary or higher in terms of mixture compounds-are presented. Also, the driving-force approach has been extended to employ the element concept for reactive systems. For multielement systems, the design is performed by employing a stage-to-stage computation method. For combined reactive distillation columns, comprising both reactive and nonreactive stages, a simple design strategy is proposed, based on the stage-to-stage computation method considering reactive and nonreactive bubble-point calculations. This strategy tracks the conversion or generation and temperature between the feed and the end stages of the column, and indicates when and where nonreactive stages should be added to a reactive distillation column in order to achieve the desired separation. Illustrative examples highlight the application of the design methods, as well as the verification of such designs through rigorous simulation MH - Denmark MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - NEW YORK: AMER INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0001-1541 UR - ISI:000186664000014 L2 - VAPOR-LIQUID-EQUILIBRIUM; BUTYL ETHER SYNTHESIS; MULTIPLE SOLUTIONS; METHYL ACETATE; SIMULATION; KINETICS; MIXTURES; SYSTEMS; MTBE SO - Aiche Journal 2003 ;49(11):2822-2841 7804 UI - 9320 AU - De Baere E AU - Beysen D AU - Oley C AU - Lorenz B AU - Cocquet J AU - De Sutter P AU - Devriendt K AU - Dixon M AU - Fellous M AU - Fryns JP AU - Garza A AU - Jonsrud C AU - Koivisto PA AU - Krause A AU - Leroy BP AU - Meire F AU - Plomp A AU - Van Maldergem L AU - De Paepe A AU - Veitia R AU - Messiaen L AD - State Univ Ghent Hosp, Dept Med Genet Gynecol & Ophthalmol, B-9000 Ghent, BelgiumRoyal Childrens Hosp, Queensland Clin Genet Serv, Brisbane, Qld, AustraliaUniv Regensburg Klinikum, Dept Pediat Ophthalmol Strabismol & Ophthalmogene, Regensburg, GermanyHop Cochin, INSERM, U Reprod & Physiopathol Obstet 361, F-75674 Paris, FranceCatholic Univ Louvain, Ctr Human Genet, B-3000 Louvain, BelgiumUniv Manchester, Sch Biol Sci, Manchester, Lancs, EnglandGrp Transamer Esteril & Fertil, Matamoros, MexicoUniv Tromso Hosp, Dept Med Genet, N-9012 Tromso, NorwayTampere Univ Hosp, Dept Clin Genet, Tampere, FinlandNatl Hlth Lab Serv, Dept Human Genet, Johannesburg, South AfricaUniv Amsterdam, Acad Med Ctr, Klin Genet, NL-1105 AZ Amsterdam, NetherlandsCtr Human Genet, Loverval, BelgiumDe Baere, E, State Univ Ghent Hosp, Dept Med Genet, De Pintelaan 185, B-9000 Ghent, Belgium TI - FOXL2 and BPES: Mutational hotspots, phenotypic variability, and revision of the genotype-phenotype correlation AB - Blepharophimosis syndrome (BPES), an autosomal dominant syndrome in which an eyelid malformation is associated (type I) or not (type II) with premature ovarian failure (POF), has recently been ascribed to mutations in FOXL2, a putative forkhead transcription factor gene. We previously reported 22 FOXL2 mutations and suggested a preliminary genotype-phenotype correlation. Here, we describe 21 new FOXL2 mutations (16 novel ones) through sequencing of open reading frame, 5' untranslated region, putative core promoter, and fluorescence in situ hybridization analysis. Our study shows the existence of two mutational hotspots: 30% of FOXL2 mutations lead to polyalanine (poly-Ala) expansions, and 13% are a novel out-of-frame duplication. In addition, this is the first study to demonstrate intra- and interfamilial phenotypic variability (both BPES types caused by the same mutation). Furthermore, the present study allows a revision of the current genotype-phenotype correlation, since we found exceptions to it. We assume that for predicted proteins with a truncation before the poly-Ala tract, the risk for development of POF is high. For mutations leading to a truncated or extended protein containing an intact forkhead and poly-Ala tract, no predictions are possible, since some of these mutations lead to both types of BPES, even within the same family. Poly-Ala expansions may lead to BPES type II. For missense mutations, no correlations can be made yet. Microdeletions are associated with mental retardation. We conclude that molecular testing may be carefully used as a predictor for POF risk in a limited number of mutations MH - Australia MH - Belgium MH - United Kingdom MH - Finland MH - France MH - Germany MH - Mexico|Tamaulipas MH - Netherlands MH - Norway MH - South Africa PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 47 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000180680000028 L2 - EPICANTHUS INVERSUS SYNDROME; BLEPHAROPHIMOSIS; PTOSIS; TRANSLOCATION; GENE; T(3-4)(Q23-P15.2); PATIENT; 3Q23 SO - American Journal of Human Genetics 2003 ;72(2):478-487 7805 UI - 7009 AU - de Haro ML AU - Taguena-Martinez J AU - Goncalves LL AU - Vieira AP AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Fed Ceara, Dept Fis, BR-60451970 Fortaleza, Ceara, BrazilUniv Sao Paulo, Inst Fis, Dept Fis Geral, BR-05315970 Sao Paulo, SP, Brazilde Haro, ML, UNAM, Ctr Invest Energia, Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Simple models for relaxation in glass-forming systems AB - An overview is provided of our recent work involving kinetic Ising models for the study of relaxation in quasi one-dimensional chains. The Hamiltonian of the first such model, introduced in 1993, was constructed so as to reduce to the one giving the intramolecular energy of the Gibbs-di Marzio lattice model for polymeric glasses. Variations of this model that retain the restricted dynamics originally considered but in which some kind of disorder is also included are briefly described. These variations still allow an analytical solution and lead to interesting properties both with regards to the response functions and to the dynamical critical exponents. Hints as to the possible origin of the 'excess' wings in the Nagel plots of the former are also mentioned. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000186435700018 L2 - LINEAR POLYMER-CHAINS; KINETIC ISING-MODEL; SUPERCOOLED LIQUIDS; DIELECTRIC LOSS; ISOTOPIC CHAIN; UNIVERSALITY SO - Journal of Non-Crystalline Solids 2003 ;329(1-3):82-93 7806 UI - 8741 AU - de Koeijer G AU - Rivero R AD - Norwegian Univ Sci & Technol, Dept Chem, N-7491 Trondheim, NorwayInst Mexicano Petr, Exergy Grp, Mexico City 07730, DF, Mexicode Koeijer, G, Corp Stateg Technol, Statoil ASA, Arkitekt Ebbellsvei 10 Rotvoll, N-7005 Trondheim, Norway TI - Entropy production and exergy loss in experimental distillation columns AB - Diabatic distillation, i.e. with heat exchangers on all trays, can increase the second law energy efficiency drastically compared to adiabatic distillation. The purpose of this research was to describe the entropy production rate in one adiabatic and one diabatic experimental water/ethanol rectifying column by applying the theory of irreversible thermodynamics. As a benchmark for the description, an exergy analysis of the two columns was used. This analysis showed that the diabatic column looses 39% less exergy than the adiabatic column. Heat and mass transfer on the trays and in the heat exchangers determined the entropy production rate, and neither pressure drop nor mixing effects played a large role in these columns. The significance of this work is the experimental confirmation of the theory on diabatic distillation. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Norway PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0009-2509 UR - ISI:000182123600015 L2 - diabatic;distillation;entropy;heat transfer;irreversible thermodynamics;mass transfer;MULTICOMPONENT SEPARATION PROCESSES; NONEQUILIBRIUM STAGE MODEL; THERMODYNAMIC ANALYSIS; OPTIMIZATION; DESIGN; RECTIFICATION; TRAY SO - Chemical Engineering Science 2003 ;58(8):1587-1597 7807 UI - 7118 AU - de la Cruz W AU - Diaz JA AU - Mancera L AU - Takeuchi N AU - Soto G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoDe La Cruz, W, UNAM, CCMC, POB 439036, San Vsidro, CA 94143, USA TI - Yttrium nitride thin films grown by reactive laser ablation AB - Yttrium nitride thin films were grown on silicon substrates by laser ablating an yttrium target in molecular nitrogen environments. The composition and chemical state were determined with Auger electron, X-Ray photoelectron, and energy loss spectroscopies. The reaction between yttrium and nitrogen is very effective using this method. Ellipsometry measurements indicate that the films are metallic. We attribute this behavior to a small oxygen contamination. Each oxygen atom introduces two additional electrons to the unit cell, resulting in a complex semiconductor-ionic-metallic system. These results are corroborated by first principles total energy calculations of clean and oxygen doped YN. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000186160800025 L2 - thin films;plasma deposition;photoelectron spectroscopy;electron energy loss spectroscopy;ab initio calculations;DIELECTRIC FUNCTION; DEPOSITION SO - Journal of Physics and Chemistry of Solids 2003 ;64(11):2273-2279 7808 UI - 7855 AU - de la Isla A AU - Brostow W AU - Bujard B AU - Estevez M AU - Rodriguez JR AU - Vargas S AU - Castano VM AD - Univ Nacl Autonoma Mexico, CFATA, Queretaro, Qro 76000, MexicoUniv N Texas, LAPOM, Dept Mat Sci & Engn, Denton, TX 76203, USAUniv Autonoma Estado Morelos, Cuernavaca, Morelos, MexicoUniv Autonoma Queretaro, Fac Med, Queretaro, Qro, MexicoBrostow, W, Univ Nacl Autonoma Mexico, CFATA, Apartado Postal 1-1010, Queretaro, Qro 76000, Mexico TI - Nanohybrid scratch resistant coatings for teeth and bone viscoelasticity manifested in tribology AB - We cover teeth surfaces with nanohybrid coatings containing an inorganic ceramic and an organic copolymer constituents. We report the first ever values of scratch penetration depth and scratch recovery for bare and coated teeth. We find that uncoated teeth undergo viscoelastic recovery (healing) after microscratching - the first manifestation of bone viscoelasticity in tribology. The coatings fill "valleys" in teeth surfaces. In each case a large improvement in the scratch resistance as compared to uncoated teeth is seen. The extent of the improvement depends on the inorganic/organic component ratios in the nanohybrids MH - Mexico|Morelos MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1432-8917 UR - ISI:000184279100010 L2 - nanohybrids;inorganic plus organic materials;viscoelasticity in tribology;teeth coatings;bone viscoelasticity;CORTICAL BONE; HYDROXYAPATITE; MICROCRACKING; TRANSMISSION; MORPHOLOGY; RELAXATION; ELASTICITY; COMPOSITES; RECOVERY; CERAMICS SO - Materials Research Innovations 2003 ;7(2):110-114 7809 UI - 8887 AU - de la Luz JLL AU - Rebman JP AU - Oberbauer T AD - Ctr Invest Biol Noroeste, La Paz 23000, Baja California, MexicoSan Diego Nat Hist Museum, San Diego, CA 92112, USACty San Diego, Dept Planning & Land Use, San Diego, CA 92112, USADe la Luz, JLL, Ctr Invest Biol Noroeste, Apdo 128, La Paz 23000, Baja California, Mexico TI - On the urgency of conservation on Guadalupe Island, Mexico: is it a lost paradise? AB - Guadalupe is an oceanic island located in the Pacific Ocean off Mexico's northwest coast. Its flora is composed of many plant species with more northern affinities and disjunctions from the California Floristic Province. Almost 16% of the native plant species are endemic, including two monospecific genera. However, the activities of feral goats released in the early 19th century have devastated most of the island. At present, at least 26 native plant species have disappeared from Guadalupe and many more seem to be on the threshold. To add to the problem, 61 exotic plant species have been documented on the island, many of which are aggressive weeds. In this paper, we propose eight types of environmental conditions for the island where different species assemblages of the pristine flora probably existed before their demise. It is of obvious urgency that the island needs a recovery plan and the first step should include the eradication of the feral goats. Only after this process can subsequent conservation measures be applied to ensure any restoration of this natural heritage. The recovery plan will need to address both spontaneous and human-induced plant repopulation processes from the main island's three southern islets, which have never been impacted by goats. Also, it may be necessary to reintroduce non-endemic, native plant taxa from the nearest Californian islands and the Mexican coast in order to reestablish some of the island's original diversity of plant species and communities. However, it should be noted that the forested communities do not have great hopes of recovering in the short term, since the ground water and soil conditions have been significantly altered. Furthermore, the eradication of an estimated 4000 goats still living on the island ( year 2000) depends upon the vacillating motivation and will of Mexican authorities MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000181689600012 L2 - Baja California;exotics;goats;Guadalupe Island;plant extinction SO - Biodiversity and Conservation 2003 ;12(5):1073-1082 7810 UI - 9171 AU - de la Pena-Diaz A AU - Cardoso-Saldana G AU - Zamora-Gonzalez J AU - Barinagarrementeria F AU - Izaguirre R AU - Loyau S AU - ngles-Cano E AD - CHU Bichat, INSERM, U460, F-75877 Paris 18, FranceInst Nacl Cardiol Ignacio Chavez, Paris, FranceInst Nacl Neurol, Mexico City, DF, MexicoAngles-Cano, E, CHU Bichat, INSERM, U460, 46 Rue Henri Huchard, F-75877 Paris 18, France TI - Functional approach to investigate Lp(a) in ischaemic heart and cerebral diseases AB - Background Lp(a), a major cardiovascular risk factor, contains a specific apolipoprotein, apo(a), which by virtue of structural homology with plasminogen inhibits the formation of plasmin, the fibrinolytic enzyme. A number of clinical reports support the role of Lp(a) as a cardiovascular or cerebral risk factor, and experimental data suggest that it may contribute to atherothrombosis by inhibiting fibrinolysis. Design A well-characterized model of a fibrin surface and an apo(a)-specific monoclonal antibody were used to develop a functional approach to detect pathogenic Lp(a). The assay is based on the competitive binding of Lp(a) and plasminogen for fibrin, and quantifies fibrin-bound Lp(a). High Lp(a) binding to fibrin is correlated with decreased plasmin formation. In a transversal case-control study we studied 248 individuals: 105 had a history of ischaemic cardiopathy (IC), 52 had cerebro-vascular disease (CVD) of thrombotic origin, and 91 were controls. Results The remarkably high apo(a) fibrin-binding in CVD (0.268 +/- 0.15 nmol L-1) compared with IC (0.155 +/- 0.12 nmol L (-1)) suggests the existence of peculiar and poorly understood differences in pro- or anti-thrombotic mechanisms in either cerebral and/or coronary arteries. Conclusions Our results demonstrated that Lp(a) fibrin-binding and small Apo(a) isoforms are associated with athero-thrombotic disease MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0014-2972 UR - ISI:000181026700002 L2 - cerebrovascular disease;fibrinolysis;ischaemic cardiopathy;lipoprotein(a);plasminogen;TISSUE PLASMINOGEN-ACTIVATOR; RECOMBINANT APOLIPOPROTEIN(A); CARDIOVASCULAR-DISEASE; PLASMA LIPOPROTEIN(A); IN-VIVO; FIBRIN; BINDING; STROKE; RISK; ANTIBODIES SO - European Journal of Clinical Investigation 2003 ;33(2):99-105 7811 UI - 7653 AU - De la Rosa-Cruz E AU - az-Torres LA AU - Salas P AU - Rodriguez RA AU - Kumar GA AU - Meneses MA AU - Mosino JF AU - Hernandez JM AU - Barbosa-Garcia O AD - Ctr Invest Opt, Leon 37150, Gto, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoRutgers State Univ, Dept Ceram & Mat Engn, Piscataway, NJ 08854, USAIFUNAM, Dept Estado Solido, Mexico City 07730, DF, MexicoDe la Rosa-Cruz, E, Ctr Invest Opt, Apartado Postal 1-948, Leon 37150, Gto, Mexico TI - Luminescent properties and energy transfer in ZrO2 : Sm3+ nanocrystals AB - The photoluminescence and crystalline structure characterization of undoped and several samarium doped ZrO2 samples are reported. Strong fluorescence emission produced by the transitions (4)G(5/2)-->H-6(5/2,7/2,9/2) of Sm3+ was obtained by the excitation of the host at 320 nm. The energy transfer process from the host to the samarium ion was confirmed by the analysis of the ZrO2 fluorescence decay curve. It is shown that the content of the active ions stabilizes the tetragonal structure of ZrO2 at 1000degreesC, being 73% for 2 mol % Sm2O3 doped and 3% for undoped samples. The dependence between the fluorescence emission and the crystalline structure is discussed. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 21 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000184844200105 L2 - UP-CONVERSION; SOL-GEL; ZIRCONIA; IONS; TEMPERATURE; CRYSTALS; FILMS; TB3+; SM3+ SO - Journal of Applied Physics 2003 ;94(5):3509-3515 7812 UI - 8883 AU - de Leon-Chavira F AU - Huerta-Diaz MA AU - Chee-Barragan A AD - Inst Invest Oceanol, Coronado, CA 92178, USAUniv Autonoma Baja California, Inst Invest Oceanog, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoHuerta-Diaz, MA, Inst Invest Oceanol, PMB-133,POB 189003, Coronado, CA 92178 USA TI - New methodology for extraction of total metals from macroalgae and its application to selected samples collected in pristine zones from Baja California, Mexico MH - USA MH - Mexico|Baja California PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000181761200025 L2 - SEAWEEDS; ARGENTINA; ELEMENTS; MN; CU; ZN SO - Bulletin of Environmental Contamination and Toxicology 2003 ;70(4):809-816 7813 UI - 8565 AU - de Leon FCP AU - Ortiz-Monasterio F AU - Tutino M AD - Univ Nacl Autonoma Mexico, Hosp Infantil Mexico Federico Gomez, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Hosp Gen Gea Gonzalez, Mexico City 04510, DF, MexicoUniv Palermo, I-90133 Palermo, Italyde Leon, FCP, Delegac Contreras, Colonia San Francisco, Venta 29-9, Mexico City 10810, DF, Mexico TI - The dawn of plastic surgery in Mexico: XVIth century AB - An aspect of early Mexican surgery in the sixteenth century is presented. The treatment of facial wounds by Alonso Lopez de Hinojosos and Agustin Farfan is reviewed. Farfan proposed total nose reconstruction, with a cutaneous arm flap, 18 years before its description in De Curtorum Chirurgia, by Tagliacozzi, in 1597 in Venice, Italy. The chapter on facial wounds by Lopez de Hinojosos and Farfan shows their concern for the final aesthetic results and should be considered the first Mexican publication in the field of plastic surgery MH - Italy MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Article AV - English IS - 0032-1052 UR - ISI:000182614200033 SO - Plastic and Reconstructive Surgery 2003 ;111(6):2025-2031 7814 UI - 6117 AU - De Leon GM AU - Farden DC AU - McBride LE AD - Univ Autonoma Zacatecas, Lab Procesamiento Digital Senales, Zacatecas 98064, Zac, MexicoN Dakota State Univ, Dept Elect & Comp Engn, Fargo, ND 58105, USADe Leon, GM, Univ Autonoma Zacatecas, Lab Procesamiento Digital Senales, Zacatecas 98064, Zac, Mexico TI - A system identification approach to estimating complex impedance spectra from electrochemical noise data AB - A system identification approach for the analysis of electrochemical noise data is proposed. The most common techniques, used by many investigators, are based on: (i) the ratio of sample standard deviations, which gives no information about the frequency dependence of the electrode impedance, or (ii) Power Spectral Density estimates, which deliver the modulus of the spectrum with large variations at the lowest frequencies. Phase is, almost invariably, not included. In this work, the electrochemical cell is modeled by an input-output model. With the application of system identification techniques, it is possible to identify values of the parameters of the system model. It is shown that this approach delivers a description of the system under study with: smooth electrode impedance curves, and magnitude and phase information. Some results obtained with the most common electrochemical noise analysis techniques are presented for comparison with the proposed approach. A theoretical limitation of the proposed approach appears if a perfect symmetry between both electrodes is considered MH - Mexico|Zacatecas MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0219-5259 UR - ISI:000189270000009 L2 - corrosion;noise resistance;electrochemical impedance;system identification;CORROSION MEASUREMENTS; RESISTANCE; TIME; COATINGS; VOLTAGE; METALS; STEEL SO - Advances in Complex Systems 2003 ;6(4):575-597 7815 UI - 7834 AU - de los Monteros AE AD - Amer Museum Nat Hist, Dept Ornithol, New York, NY 10024, USAde los Monteros, AE, Inst Ecol AC, Km 2-5 Carretera Abtugya & Coatepec,Apartado Post, Xalapa 91000, Veracruz, Mexico TI - Models of the primary and secondary structure for the 12S rRNA of birds: A guideline for sequence alignment AB - Models of the primary and secondary structure for the 12S ribosomal RNA (rRNA) gene of birds is presented based on a comparison of 100 species. Preliminary higher-order structures were delimited following the model for vertebrates. Paired regions were refined following a complementary base-pairing criterion and compensatory mutations were considered as a further confirmation of their existence. The model shows 40 stems, 20 internal loops and 17 external loops, arranged in the typical four domains suggested for the small subunit rRNA. The higher-order structures recovered in the model were used to build a multiple sequence alignment appropriate for phylogenetic analysis. The phylogeny recovered from this alignment was compared with trees inferred from alignments assembled using different alignment parameters in the program ClustalW. The alignment based on the secondary structure is sensitive to positional covariation of stems. Nonetheless, the phylogeny recovered with this method resulted in relationships that are more congruent with non-molecular data than those inferred from alternative alignments MH - Mexico|Veracruz MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 1042-5179 UR - ISI:000184433200002 L2 - 12S rRNA;primary structure;secondary structure;birds;alignment;maximum parsimony;MITOCHONDRIAL-DNA; PHYLOGENETIC ANALYSIS; CYTOCHROME-B; SUBUNIT RNA; EVOLUTION; SELECTION; PATTERNS; CLUSTAL; ORDER; GENE SO - Dna Sequence 2003 ;14(4):241-256 7816 UI - 6590 AU - de Maagd RA AU - Bravo A AU - Berry C AU - Crickmore N AU - Schnepf HE AD - Plant Res Int BV, NL-6700 AA Wageningen, NetherlandsDowAgroSci, San Diego, CA 92121, USAUniv Sussex, Sch Life Sci, Brighton BN1 9QG, E Sussex, EnglandUniv Wales Coll Cardiff, Cardiff Sch Biosci, Cardiff CF10 3US, S Glam, WalesUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62191, Morelos, Mexicode Maagd, RA, Plant Res Int BV, NL-6700 AA Wageningen, Netherlands TI - Structure, diversity, and evolution of protein toxins from spore-forming entomopathogenic bacteria AB - Gram-positive spore-forming entomopathogenic bacteria can utilize a large variety of protein toxins to help them invade, infect, and finally kill their hosts, through their action on the insect midgut. These toxins belong to a number of homology groups containing a diversify of protein structures and modes of Action. In many cases; the toxins consist of unique folds or novel combinations of domains having known protein folds. Some of the toxins display a similar structure and mode of action to-certain toxins of mammalian pathogens" suggesting a common evolutionary origin. Most of these toxins are produced in large amounts during sporulation and have the remarkable feature that they are localized in parasporal crystals. Localization of multiple toxin-encoding genes on plasmids together with mobilizable elements enables bacteria to shuffle their armory of toxins. Recombination between, toxin genes and sequence divergence has resulted in a wide range of host specificities MH - United Kingdom MH - Mexico|Morelos MH - Netherlands MH - USA PB - PALO ALTO: ANNUAL REVIEWS RP - NOT IN FILE U3 - TC 55 U4 - Genetics & Heredity U5 - J;Review AV - English IS - 0066-4197 UR - ISI:000187792500016 L2 - insects;Bacillus thuringiensis;Bacillus sphaericus;crystal proteins;insecticidal proteins;SPHAERICUS BINARY TOXIN; THURINGIENSIS SUBSP ISRAELENSIS; BRUSH-BORDER MEMBRANES; VEGETATIVE INSECTICIDAL PROTEIN; PESTICIDAL CRYSTAL PROTEINS; CULEX-PIPIENS DIPTERA; BACILLUS-THURINGIENSIS; DELTA-ENDOTOXIN; MOSQUITOCIDAL TOXIN; DOMAIN-III SO - Annual Review of Genetics 2003 ;37():409-433 7817 UI - 7428 AU - De Mejia EG AU - Guzman-Maldonado SH AU - costa-Gallegos JA AU - Reynoso-Camacho R AU - Ramirez-Rodriguez E AU - Pons-Hernandez JL AU - Gonzalez-Chavira MM AU - Castellanos JZ AU - Kelly JD AD - Univ Illinois, Dept Food Sci & Human Nutr, Biotechnol Legume & Plant Nutr Labs, Urbana, IL 61801, USAUniv Autonoma Queretaro, Sch Chem, Mexico City, DF, MexicoMichigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USA TI - Effect of cultivar and growing location on the trypsin inhibitors, tannins, and lectins of common beans (Phaseolus vulgaris L.) grown in the semiarid highlands of Mexico AB - Trypsin inhibitors (TI), tannins, and lectins appear to have a role in preventing chronic diseases in humans. The genetic variability of these traits in common bean needs to be ascertained in order to increase levels through breeding. The variability of TI, tannin, and lectins was determined in five bean cultivars grown at five locations in Mexico. TI and tannins contents in colored beans that belong to the Jalisco race were higher (11.1-11.9 trypsin units inhibited (TUI)/mg and 29.0-38.1 mg catechin equivalent (CE)/g, respectively) than cultivars of the Durango race (7.9-8.3 TUI/mg and 16.8-19.9 CE/mg, respectively). Bayo Victoria, a Durango race cultivar, had three times more lectins than levels reported for soybean. Cultivar influenced TI and tannins contents (p < 0.001), whereas site affected lectins (p < 0.001). An increase in levels of TI and tannins could be enhanced through breeding MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000185403200023 L2 - common bean;Phaseolus vulgaris;trypsin inhibitors;tannins;lectins;nutraceutical;NATURAL PHENOLIC-COMPOUNDS; PROTEIN-QUALITY; HUMAN-NUTRITION; LEGUMES; HEALTH SO - Journal of Agricultural and Food Chemistry 2003 ;51(20):5962-5966 7818 UI - 7810 AU - De Mejia EG AU - Martinez-Resendiz V AU - Castano-Tostado E AU - Loarca-Pina G AD - Univ Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801, USAUniv Autonoma Queretaro, Sch Chem, PROPAC, Res & Grad Studies Food Sci, Queretaro, Mexicode Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 260 Bevier Hall,905 S Goodwin, Urbana, IL 61801 USA TI - Effect of drought on polyamine metabolism, yield, protein content and in vitro protein digestibility in tepary (Phaseolus acutifolius) and common (Phaseolus vulgaris) bean seeds AB - The objective of the present study was to investigate the effect of drought on the metabolism of proline, ornithine and polyamines, and the enzymes involved in their synthesis and degradation, in tepary and common bean seeds. Furthermore, the effect on seed yield, protein content and in vitro protein digestibility was also studied. Genotypes of tepary bean (Phaseolus acutifolius) used were: PI-301-801 from Nicaragua; G-400-35 from Oaxaca, Mexico; L-242-24 and L-242-36 from Sonora, Mexico; L-172 from Arizona, USA; and the common bean (Phaseolus vulgaris) variety Flor de Mayo Bajio (FMB) from Mexico. The cultivars were grown in a greenhouse under controlled temperature, light and humidity. Water content in plants (WCP) decreased when irrigation was stopped (1 and 2 weeks after blooming). Common bean had the lowest WCP value (73.75%), while the best genotypes were PI-301-801 (91.62%), G-400-35 (88.70%) and L-242-24 (85.73%). Tepary bean plants had superior water absorption capacity, which helped to increase yield. De novo synthesis of drought proteins may explain the increased protein content present under drought conditions. The results suggest that water stress induced ornithine amino transferase activity and ornithine concentration. Proline also increased under drought conditions (p < 0.05). Genotypes L-242-24 and G-400-35, which had the highest yield, also had a major concentration of polyamines under water stress. The results also suggest that arginase activity participated in amino acid synthesis such as ornithine and, consequently, in the protein concentration under water stress. Genotypes G-400-35 and L-242-24 are good alternatives for cultivation in and zones. (C) 2003 Society of Chemical Industry MH - USA MH - Mexico|Queretaro PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000184432700005 L2 - polyamines;common bean;tepary bean;water stress;PROLINE METABOLISM; CEREAL LEAVES; STRESS; WILD; ACCUMULATION; PERFORMANCE; CITRULLINE; TOLERANCE; VARIETIES; CULTIVAR SO - Journal of the Science of Food and Agriculture 2003 ;83(10):1022-1030 7819 UI - 8404 AU - De Mejia EG AU - Ramirez-Mares MV AU - rce-Popoca E AU - Villa-Trevino S AD - Univ Illinois, Urbana, IL 61801, USAIPN, CINVESTAV, Mexico City 07738, DF, Mexico TI - A tea preparation of Ardisia compressa inhibits liver carcinogenesis in rats MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796900031 SO - Faseb Journal 2003 ;17(5):A761-A761 7820 UI - 7513 AU - de Oliveira-Garcia D AU - Dall'Agnol M AU - Rosales M AU - Azzuz ACGS AU - Alcantara N AU - Martinez MB AU - Giron JA AD - Univ Arizona, Dept Microbiol & Immunol, Tucson, AZ 85724, USAUniv Sao Paulo, Inst Dante Pazzanese Cardiol, Clin Lab, BR-05508 Sao Paulo, BrazilUniv Sao Paulo, Inst Ciencias Biomed, Dept Microbiol, BR-05508 Sao Paulo, BrazilBenemerita Univ Autonoma Puebla, Inst Ciencias, Puebla, MexicoInst Politecn Nacl, Mexico City, DF, MexicoGiron, JA, Univ Arizona, Dept Microbiol & Immunol, Tucson, AZ 85724, USA TI - Fimbriae and adherence of Stenotrophomonas maltophilia to epithelial cells and to abiotic surfaces AB - Stenotrophomonas maltophilia is an emerging nosocomial bacterial pathogen associated with several infectious diseases and opportunistic infections, especially in immunocompromised patients. These bacteria adhere avidly to medical implants and catheters forming a biofilm that confers natural protection against host immune defences and different antimicrobial agents. The nature of the bacterial surface factors involved in biofilm formation on inert surfaces and in adherence of S. maltophilia to epithelial cells is largely unknown. In this study, we identified and characterized fimbrial structures produced by S. maltophilia grown at 37degreesC. The S. maltophilia fimbriae 1 (SMF-1) are composed of a 17 kDa fimbrin subunit which shares significant similarities with the N-terminal amino acid sequences of several fimbrial adhesins (G, F17, K99 and 20K) found in Escherichia coli pathogenic strains and the CupA fimbriae of Pseudomonas aeruginosa. All of the clinical S. maltophilia isolates tested produced the 17 kDa fimbrin. Antibodies raised against SMF-1 fimbriae inhibited the agglutination of animal erythrocytes, adherence to HEp-2 cells and biofilm formation by S. maltophilia. High resolution electron microscopy provided evidence of the presence of fimbriae acting as bridges between bacteria adhering to inert surfaces or to cultured epithelial cells. This is the first characterization of fimbriae in this genus. We provide compelling data suggesting that the SMF-1 fimbriae are involved in haemagglutination, biofilm formation and adherence to cultured mammalian cells MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Cell Biology;Microbiology U5 - J;Article AV - English IS - 1462-5814 UR - ISI:000185226900006 L2 - ENTEROPATHOGENIC ESCHERICHIA-COLI; CYSTIC-FIBROSIS PATIENTS; XANTHOMONAS-MALTOPHILIA; BIOFILM FORMATION; PSEUDOMONAS-MALTOPHILIA; NOSOCOMIAL PATHOGEN; EPIDEMIOLOGY; INFECTIONS; FLAGELLA; STRAINS SO - Cellular Microbiology 2003 ;5(9):625-636 7821 UI - 7250 AU - de Paz AG AU - Madore BF AU - Noeske K AU - Cairos LM AU - Papaderos P AU - Silich SA AD - Carnegie Inst Washington, Carnegie Observ, Pasadena, CA 91101, USACALTECH, NASA IPAC Extragalact Database, Pasadena, CA 91125, USAUniv Sternwarte Gottingen, D-37083 Gottingen, GermanyInst Nacl Astrofis Opt & Elect, Tonantzintla 72000, Puebla, Mexicode Paz, AG, Carnegie Inst Washington, Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA TI - Discovery of a double ring in the dwarf galaxy Markarian 409 AB - We report the discovery of a double ring of emission-line regions around the nucleus of the blue compact dwarf galaxy Mrk 409 as seen by deep, ground-based Halpha images. Echelle spectroscopy obtained at Magellan I with MIKE shows the presence of ionized gas flowing out of the galaxy from a very massive (greater than or equal to7 x 10(6) M-.), nuclear starburst with projected expansion velocities of similar to 50 km s(-1). Different scenarios for the formation of these rings are discussed. While the innermost, nuclear ring is most probably formed by the interaction of a starburst-driven shock with the surrounding interstellar medium, the origin of the outer ring is less clear MH - USA MH - Germany MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185916100014 L2 - galaxies : dwarf;galaxies : evolution;galaxies : individual (Markarian 409, NGC 3011);galaxies : kinematics and dynamics;galaxies : starburst;STAR-FORMATION HISTORY; PROCESSED MATTER; MRK 86; MODELS; GAS SO - Astrophysical Journal 2003 ;596(2):L179-L182 7822 UI - 6770 AU - De Vizcaya-Ruiz A AU - Rivero-Muller A AU - Ruiz-Ramirez L AU - Howarth JA AU - Dobrota M AD - Univ Surrey, Sch Biomed & Life Sci, Guildford GU2 7XH, Surrey, EnglandUniv Turku, Inst Biomed, Turku, FinlandUNAM, Fac Quim, Mexico City, DF, MexicoIPN, CINVESTAV, Seccion Externa Toxicol, Mexico City 07360, DF, MexicoDe Vizcaya-Ruiz, A, Univ Surrey, Sch Biomed & Life Sci, Guildford GU2 7XH, Surrey, England TI - Hematotoxicity response in rats by the novel copper-based anticancer agent: casiopeina II AB - The in vivo toxicity of the novel copper-based anticancer agent, casiopeina II (Cu(4,7-dimethyl-1, 10-phenanthroline)(glycine)NO3) (CII), was investigated. Casiopeinas are a family of copper-coordinated complexes that have shown promising anticancer activity. The major toxic effect attributed to a single i.v. administration of CII (5 mg/kg dose) in the rat was an hemolytic anemia (reduced hemoglobin concentration (HB), red blood cell (RBC) count and packed cell volume (PCV) accompanied by a marked neutrophilic leukocytosis) 12 h and 5 days after administration, attributed to a direct erythrocyte damage. Increased reticulocyte levels and presence of normoblasts in peripheral blood 5 days post-administration indicated an effective erythropoietic response with recovery at 15 days. Increase in spleen weight and the morphological evidence of congestion of the red pulp (RP) with erythrocytes (E) resulting in a higher ratio of red to white pulp (WP) was consistent with increased uptake of damaged erythrocytes by the reticuloendothelial system observed by histopathology and electron microscopy. Extramedullary hemopoiesis was markedly increased at 5 days giving further evidence of a regenerative erythropoietic response that had an effective recovery by 15 days. Morphological changes in spleen cellularity were consistent with hematotoxicity, mainly a reduction of the red pulp/white pulp ratio, increase in erythrocyte content at 12 h, and an infiltration of nucleated cells in the red pulp at 5 days, with a tendency towards recovery 15 days after administration. The erythrocyte damage is attributed to generation of free radicals and oxidative damage on the membrane and within cells resulting from the reduction of Cu(II) and the probable dissociation of the CII complex. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - United Kingdom MH - Finland MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0300-483X UR - ISI:000187013500009 L2 - casiopeina;hematotoxicity;copper;anticancer agents;spleen;metal complexes toxicity;rat;COMPLEXES; TOXICITY; DNA; DAMAGE; CELLS; ION SO - Toxicology 2003 ;194(1-2):103-113 7823 UI - 6391 AU - Defeo O AU - Gutierrez N AD - UNDECIMAR, Fac Ciencias, Montevideo 11400, UruguayDINARA, Dept Biol Pesquera, Montevideo 11200, UruguayCINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoDefeo, O, UNDECIMAR, Fac Ciencias, Igua 4225,POB 10773, Montevideo 11400, Uruguay TI - Geographical patterns in growth estimates of the scallop Zygochlamys patagonica, with emphasis on Uruguayan waters AB - Growth parameters of the scallop Zygochlamys patagonica were estimated in Uruguayan waters of the southwestern Atlantic Ocean. Data used to estimate growth were collected at latitudes 35degrees50'S (northern end of the geographical distribution of the species) and 36degrees40'S (southern end of Uruguayan waters). Scallop ages were estimated by counting external growth rings on the left-hand valves. The von Bertalanffy function (VBGF) successfully explained some 93% (36degrees40'S) and 84% (35degrees50'S) of the variance. A likelihood ratio test indicated that scallops grew significantly faster at latitude 36degrees40'S than at latitude 35degrees50'S, confirming previous results showing large scale variation in density and individual muscle weight. Between-latitude differences were mainly ascribed to variations in the parameter t(0), which in turn could be explained by differences in observed lengths-at-age at earlier ages, notably age 1. Information on growth parameters of Z patagonica, extracted from published sources over a wide latitudinal range (35degrees50'S-54degrees30'S), showed that asymptotic height H-infinity and the index of growth performance phi' were inversely correlated with latitude, decreasing from north to south. The growth parameter estimates provided in this study are consistent with the pattern. Management implications of these findings are discussed, placing special emphasis on the applicability of spatially explicit management tools MH - Mexico|Yucatan MH - Uruguay PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 6 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000188365100007 L2 - scallops;Zygochlamys;growth;large-scale patterns;Uruguay;POPULATION; FISHERY; SHELF SO - Journal of Shellfish Research 2003 ;22(3):643-646 7824 UI - 6713 AU - Defeo O AD - Unidad Merida, CINVESTAV IPN, Merida 97310, Yucatain, MexicoFac Ciencias, UNDECIMAR, Montevideo 11400, UruguayDefeo, O, Unidad Merida, CINVESTAV IPN, A P 73 Cordemex, Merida 97310, Yucatain, Mexico TI - Marine invertebrate fisheries in sandy beaches: An overview AB - Artisanal marine invertebrate fisheries of sandy shores are amongst the poorest understood systems regarding connections between the structure and dynamics of harvested resources, a complex fishing process that involves recreational and commercial users and a management subsystem influenced by cultural, social and political factors. For thin reason, this paper addresses: (1) the temporal extractive phases through which benthic invertebrate stocks of sandy shores have gone through time, the confronted socio-economic scenarios and the relevance of different operational management measures and strategic institutional structures, and (2) critical ecological aspects of the life cycle that must be considered in assessment and management because of their strong incidence in the dynamics of the fishing process. Concerning (1): most sandy beach stocks around the-world are fully exploited, overexploited or depleted. Open access regimes and the fact that ocean beaches are open and extended systems readily accessible to unauthorized fishers or recreational harvesters, are important causes of management failure. Preferred operational management measures to revert such situation must consider spatially explicit management strategies such as reproductive refugia, rotation and closure of grounds, experimental management with spatial controls, habitat-dependent enhancement through natural restocking and seeding, and a combination of the above and other measures (e.g., size limits) through management redundancy. The high information, enforcement and policing costs of management regulations-stress the importance of fisher participation in its planning, formulation and surveillance, through formal co-management as the desired institutional arrangement. In this context, I discuss study cases in which co-management and experimental approaches were applied on a different extent and with diverse modus operandi, and how these procedures determined a gain in scientific information. Concerning (2): (a) Sandy beach populations are highly spatially structured stocks, which determine an also aggregated allocation of fishing effort. This aggregated nature of sandy beach stocks and harvesting behaviour calls for implementing spatially-explicit management strategies to properly evaluate the trade-off between alternative harvest tactics. (b) Most resources constitute metapopulations with planktonic larvae and a benthic adult phase. High and variable mortality during them dispersive planktonic phase makes prediction of recruitment to the benthic life highly uncertain. Different management strategies could be set up depending on the pattern of connectance between metapopulation components and the extent-of aggregation and persistence of the spatial structure in adults. (c) Longterm, large-scale field experiments suggest that large fluctuations in sandy beach populations are the result of intertwined forces of exogenous, environmental, density-dependent and human-induced factors operating together at different spatial and temporal scales. (d) Harvesting produces incidental mortality in exploited and unexploited population fractions and also in unharvested sympatric species, by means of direct (shell damage) and indirect (sediment disturbance) agents. (e) Short and long-term climatic events, accumulation of toxins resulting from algal blooms and viral diseased produce massive mortalities that must be addressed throughout the entire range. of distribution of species. The identification of meaningful spatial and temporal scales of variability in population regulation mechansms and processes, and also in the dynamic nature of the fishing process, are relevant for assessment and-management. Throughout the paper I stress some future research directions directed to improve the management status of sandy beach fisheries around the world MH - Mexico|Yucatan MH - Uruguay PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000202961200007 L2 - artisanal fisheries;sandy beaches;management SO - Journal of Coastal Research 2003 ;():56-65 7825 UI - 6716 AU - Defeo O AU - Lercari D AU - Gomez J AD - Fac Ciencias, UNDECIMAR, Montevideo 11400, UruguayCINVESTAV, IPN, Unidad Merida, Merida 97310, Yucatan, MexicoDefeo, O, Fac Ciencias, UNDECIMAR, Igua 4225,POB 10773, Montevideo 11400, Uruguay TI - The role of morphodynamics in structuring sandy beach populations and communities: What should be expected? AB - The consistent increase in species richness, abundance, biomass and ecological diversity from reflective to dissipative sandy beaches has been widely reported and proposed as a paradigm in sandy beach ecology. Supports of this prediction have relied on the autoecological (AH) and swash exclusion (SEH) hypotheses. In this paper, the AH and the SEH were merged in the "habitat harshness hypothesis" (HHH), which was used to test predictions both at a community and population levels, based on information obtained for exposed sandy beaches of Uruguay. We overview published and unpublished information about the demography and life history traits of the supralittoral talitrid amphipod Pseudorchestoidea brasiliensis and the intertidal mole crab Emerita brasiliensis in two microtidal exposed sandy beaches that differed widely in physical characteristics. Community-level responses widely supported HHH predictions: a consistent increase in abundance and species richness was observed from the reflective to the dissipative beach. However, population level responses for sandhopper and mole crab differed to community ones and thus the HHH did not predict successfully observed patterns in abundance, and in the case of the sandhopper, major life history characteristics. The HHH was particularly useful in explaining female somatic growth and reproductive features, such as fecundity, size at maturity and weight at size, which could be related to a major amount of food availability in dissipative beaches. We conclude that hypotheses supporting community ecology theory at sandy beaches did not provide satisfactory explanations to spatio-temporal fluctuations in abundance, structure and dynamics of populations. We postulate that biotic mechanisms could be of utmost importance in dissipative beaches, whereas reflective beach populations could be mainly regulated by individual responses to the environment. Thus, strong emphasis should be. placed on the life-history plasticity of individual species and the identification of meaningful spatial and temporal scales to assess the dimension of population regulation mechanisms and processes MH - Mexico|Yucatan MH - Uruguay PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000202961200040 L2 - population regulation;mechanisms;processes;sandy beaches SO - Journal of Coastal Research 2003 ;():352-362 7826 UI - 8664 AU - Defeo O AU - Martinez G AD - IPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoFac Ciencias, UNDECIMAR, Montevideo 11400, UruguayInst Nacl Pesca, Montevideo 11200, UruguayDefeo, O, IPN, CINVESTAV, Unidad Merida, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - The habitat harshness hypothesis revisited: life history of the isopod Excirolana braziliensis in sandy beaches with contrasting morphodynamics AB - Demographic and life history characteristics of the intertidal isopod Excirolana braziliensis (Isopoda: Cirolanidae) were compared between populations of two exposed sandy beaches with contrasting morphodynamics (reflective vs dissipative) during 22 consecutive months. Most population processes and life history traits did not give support for the 'habitat harshness hypothesis' (HHH): abundance of males, females, ovigerous females and juveniles was significantly higher at the reflective beach population, which also presented higher growth rates in size and weight with respect to the dissipative beach population. No significant differences in weight-at-length were found between beaches. Among the compared parameters, only the lower natural mortality rates at the dissipative beach gave support for the HHH. The results were not consistent with a previous analysis of Excirolana brazzliensis along Pan-American beaches, which showed that this isopod occurs almost invariably in fine sands of tropical and temperate beaches. The results give strong support to recent findings that show that in macrofauna species capable of sustaining large populations across a wide spectrum of physical conditions, such as Excirolana brazzliensis, beach morphodynamics should not be considered the primary factor affecting abundance and life history traits. Instead, our results reinforce the view that sandy beach populations are controlled by the intertwined forces of biotic and abiotic factors operating together MH - Mexico|Yucatan MH - Uruguay PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 15 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000182319200013 L2 - CLAM MESODESMA MACTROIDES; CRAB EMERITA-BRASILIENSIS; RIO-DE-JANEIRO; MORPHOLOGICAL DIVERGENCE; RECRUITMENT VARIABILITY; PHENOTYPIC PLASTICITY; POPULATION-DYNAMICS; DENSITY-DEPENDENCE; TEMPORAL VARIATION; NATURAL-HISTORY SO - Journal of the Marine Biological Association of the United Kingdom 2003 ;83(2):331-340 7827 UI - 6777 AU - DeGorordo A AU - Vallejo-Manzur F AU - Chanin K AU - Varon J AD - Baylor Coll Med, Houston, TX 77030, USAUniv Texas, Hlth Sci Ctr, Houston, TX 77030, USAUniv Autonoma Tamaulipas, Tamaulipas, MexicoInst Tecnol & Estudios Super Monterrey, Sch Med, Tamaulipas, MexicoVaron, J, Baylor Coll Med, 2219 Dorrington St, Houston, TX 77030, USA TI - Diving emergencies AB - Self-Contained Underwater Breathing Apparatus (SCUBA) diving popularity is increasing tremendously, reaching a total of 9 million people in the US during 2001, and 50,000 in the UK in 1985. Over the past 10 years, new advances, equipment improvements, and improved diver education have made SCUBA diving safer and more enjoyable. Most diving injuries are related to the behaviour of the gases and pressure changes during descent and ascent. The four main pathologies in diving medicine include: barotrauma (sinus, otic, and pulmonary); decompression illness (DCI); pulmonary edema and pharmacological and toxic effects of increased partial pressures of gases. The clinical manifestations of a diving injury may be seen during a dive or up to 24 h after it. Physicians living far away from diving places are not excluded from the possibility of encountering diver-injured patients and therefore need to be aware of these injuries. This article reviews some of the principles of diving and pathophysiology of diving injuries as well as the acute treatment, and further management of these patients. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Tamaulipas MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 6 U4 - Critical Care Medicine;Emergency Medicine U5 - J;Review AV - English IS - 0300-9572 UR - ISI:000187019600004 L2 - barotrauma;decompression illness;pulmonary edema;venous gas embolism;carbon monoxide poisoning;oxygen toxicity;nitrogen narcosis;MIDDLE-EAR BAROTRAUMA; PULMONARY-EDEMA; DECOMPRESSION-SICKNESS; MEDICAL PROBLEMS; SCUBA-DIVERS; BUBBLES; PREVENTION; INJURIES; ILLNESS SO - Resuscitation 2003 ;59(2):171-180 7828 UI - 9192 AU - Deharveng L AU - Zavagno A AU - Salas L AU - Porras A AU - Caplan J AU - Cruz-Gonzalez I AD - Lab Astrophys Marseille, F-13248 Marseille 4, FranceUNAM, IA, Observ Astron Nacl, Ensenada, Baja California, MexicoUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoDeharveng, L, Lab Astrophys Marseille, 2 Pl Le Verrier, F-13248 Marseille 4, France TI - Sequential star formation at the periphery of the HII regions Sh 217 and Sh 219 AB - The H II regions Sh 217 and Sh 219 are textbook examples of a Stromgren sphere surrounded by an annular photodissociation region (PDR). The annular PDR is observed in both the 21 cm atomic hydrogen emission and the dust (PAH) emission near 8 mum (MSX Survey). An ultracompact radio continuum source is observed in the direction of the annular PDR, in both Sh 217 and Sh 219. JHK observations show the presence of highly reddened stellar clusters (A(V)similar to20 mag) in the directions of these radio sources. These clusters are also IRAS sources, of luminosities 22 700 L-circle dot for Sh 217 and 5900 L-circle dot for Sh 219. Each cluster contains at least one luminous star with an IR colour excess; the one in the Sh 219 cluster shows Halpha emission. The cluster associated with Sh 217 is almost spherical and contains luminous objects at its centre. The cluster associated with Sh 219 is elongated along the ionization front of this H II region. We argue that these are "second-generation clusters", which means that the physical conditions present in the PDRs, close to the ionization fronts, have favoured the formation of clusters containing massive objects. We discuss the physical mechanisms that may be at the origin of the observed triggered star formation MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000181046200036 L2 - ISM : HII regions;ISM : individual objects : Sh 217;ISM : individual objects : Sh 219;stars : formation;stars : early-type;H-II REGIONS; INITIAL MASS FUNCTION; MOLECULAR CLOUDS; SOLAR CIRCLE; IRAS SOURCES; COMETARY GLOBULES; INTERSTELLAR DUST; MAIN-SEQUENCE; OUTER GALAXY; EMISSION SO - Astronomy & Astrophysics 2003 ;399(3):1135-1145 7829 UI - 6461 AU - Dehoff RC AU - Gaxiola E AU - Cangiano JL AU - Garcia-Barreto D AU - Conti CR AU - Pepine CJ AD - Univ Florida, Gainesville, FL, USAIst Cardiovasc Guadalajara, Guadalajara, Jalisco, MexicoClin Las Amer, Hato Rey, PR, USAInst Cardiol & Cardiovasc Surg, Havana, Cuba TI - Blood pressure reduction and CV outcomes in hypertensive Hispanics, Blacks, and Caucasians with coronary artery disease: the INternational VErapamil/trandolapril STudy MH - Cuba MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000186360602127 SO - Circulation 2003 ;108(17):450-450 7830 UI - 8191 AU - Dejean A AU - Durou S AU - Olmsted I AU - Snelling RR AU - Orivel M AD - Univ Toulouse 3, Lab Ecol Terr, UMR 5552, F-31062 Toulouse 4, FranceLos Angeles Cty Museum Nat Hist, Los Angeles, CA 90007, USACtr Invest Cient Yucatan, Merida 97310, Yucatan, MexicoDejean, A, Univ Toulouse 3, Lab Ecol Terr, UMR 5552, 118 Route de Narbonne,Bat 4 R3, F-31062 Toulouse 4, France TI - Nest site selection by ants in a flooded Mexican mangrove, with special reference to the epiphytic orchid Myrmecophila christinae AB - The distribution of the arboreal ant community plus a termite species of the genus Nasutitermes was inventoried on 938 red mangrove, Rhizophora mangle L., trees in a completely flooded mangrove forest of the Sian Ka'an Biosphere Reserve, Quintana Roo, Mexico. Colonies sheltered in dry hollow branches of the trees and the pseudobulbs of the epiphytic orchid, Myrmecophila christinae. Two size classes of dry hollow tree branches were categorized in order to test differences in ant distribution. As some trees remained unoccupied by either an ant or a termite colony, we deduced that the competition for nesting sites was low. Differences in the composition of the ant community corresponded to the nature of the shelters (i.e. diameter of the hollow branches or orchid pseudobulbs). The ant fauna was richer in the large dry hollow branches of R. mangle than in the smaller ones, with certain ant species belonging to the subfamilies Ponerinae and Formicinae being significantly more frequent in the large dry hollow branches than in the small ones. Cephalotes and Pseudomyrmex were the most frequent ant genera inhabiting the dry branches of R. mangle, while Dolichoderus bispinosus was the most frequent ant species inhabiting the orchid pseudobulbs. Arboreal Nasutitermes sp. selected mostly the orchid pseudobulbs and thus indirectly interfered with ant nest-site selection. Our results highlight niche differentiation through the selection of nest sites among different types of shelter MH - France MH - Mexico|Yucatan MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000183658600011 L2 - ants;diversity;epiphytes;mangroves;Mexico;nest-site selection;termites;NORTHERN AUSTRALIA; PLANT INTERACTIONS; RAIN-FOREST; HYMENOPTERA; FORMICIDAE; COMMUNITIES; CANOPY; FAUNA SO - Journal of Tropical Ecology 2003 ;19():325-331 7831 UI - 7551 AU - Del Angel G AU - Bonilla A AU - Pena Y AU - Navarrete J AU - Fierro JLG AU - Acosta DR AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoCSIC, Inst Catalisis & Petr Quim, Madrid 28049, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoDel Angel, G, Col Vicentina, San Rafael Atlizco 186,CP 09340, Mexico City 55534, DF, Mexico TI - Effect of lanthanum on the catalytic properties of PtSn/gamma-Al2O3 bimetallic catalysts prepared by successive impregnation and controlled surface reaction AB - Bimetallic PtSn/gamma-Al2O3-La2O3 catalysts were prepared by two comparative methods, successive impregnation (SI) and controlled surface reaction (CSR). F-FIR-pyridine adsorption revealed a decrease in support acidity as a function of lanthanum content. Oxidized Pt2+ was identified by CO-FTIR chemisorption and by XPS spectra on catalysts prepared by SI. When the CSR preparation method was used, reduced Pt-0 was observed and oxidized Pt2+ was not detected. As the lanthanum content increased a diminution in cyclohexane dehydrogenation and n-heptane conversion was observed. Low hydrogenolysis and high selectivity to C-7-olefins were obtained in both preparations. It is proposed that lanthanum in SI catalysts stabilizes the platinum in an oxidation state, Pt2+, and diminishes the support acidity. In CSR preparations the lanthanum effect is limited to inhibit the support acidity and hence to the bifunctional reactions occurring during the n-heptane conversion. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000185143700008 L2 - PtSn/gamma-Al2O3 lanthanum-doped catalysts;platinum-tin catalysts;platinum-tin successive impregnation;platinum-tin controlled surface reaction;platinum-tin XPS studies;platinum-tin FTIR-CO adsorption;X-RAY-ABSORPTION; PT-SN CATALYSTS; TOPOLOGICAL SEGREGATION; PROPANE DEHYDROGENATION; PLATINUM CATALYSTS; PERFORMANCE; CONVERSION; CHLORINE; BENZENE; RHODIUM SO - Journal of Catalysis 2003 ;219(1):63-73 7832 UI - 9058 AU - del Rio MS AU - Cepa J AD - INAOE, Puebla 72000, MexicoInst Astrofis Canarias, Tenerife 38200, SpainUniv La Laguna, Fac Fis, Dept Astrofis, Tenerife 38071, Spaindel Rio, MS, INAOE, Puebla 72000, Mexico TI - The nature of arms in spiral galaxies - II. The sample AB - We present here the results of an imaging study of eight grand-design and two intermediate-arm galaxies, based on CCD observations in U, B, V, R and I. We give grey-scale images, both in individual and in colour indices. Also we present a decomposition into bulge and disc following an iterative method. This provides us with a reasonable estimate of the bulge size and disc scale length, and shows the disc deviation from an exponential law, which can be interpreted as due to the long-term star formation caused by the spiral arms. To evaluate the contribution of the spiral arms to the disc luminosity distribution, with the aid of a mask we have decomposed each image into two parts: arms (which include bulge and nucleus, and eventually bars) and inter-arms (which include the outer disc). In subsequent papers in this series (del Rio & Cepa 1998, hereafter Paper III; del Rio & Cepa 1999, hereafter Paper IV) the data presented here are used to analyse the spiral structure of the galaxies of the sample, using the methods of Beckman & Cepa (1990, hereafter Paper I) and the Fourier transform method to find the different symmetry degrees MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000181298700004 L2 - galaxies : spiral;galaxies : structure;PROFILES SO - Astronomy & Astrophysics 2003 ;400(2):421-428 7833 UI - 7152 AU - Del Val E AU - Dirzo R AD - UNAM, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, MexicoDirzo, R, Univ London Imperial Coll Sci Technol & Med, Dept Biol, Silwood Pk, Ascot SL5 7PY, Berks, England TI - Does ontogeny cause changes in the defensive strategies of the myrmecophyte Cecropia peltata? AB - Cecropia peltata L. is a myrmecophyte, with a wide distribution in the neotropics, predominantly associated with ants of the genus Azteca. It has been shown that Azteca ants defend Cecropia plants against herbivores, and that the plants provide housing (hollow stems) and food (Mullerian bodies) for the ant colony. In the field, occupation by ants does not take place until plants have reached a minimum colonisable size (ca 1 m height), and defensive ants do not occupy small plants. Therefore, juvenile individuals lack such biotic defence. This constitutes an ontogenetic constraint to biotic defence in these plants. We tested the hypothesis that in the stage previous to colonisation plants of Cecropia peltata in a Mexican tropical forest may exhibit some alternative or complementary defensive mechanism against herbivores. We compared, in pre-colonised and colonised plants: rates of herbivory, concentrations of potentially defensive secondary metabolites (total phenolics and condensed tannins), and trichome density. We also conducted acceptability bioassays with a generalist herbivore (Spodoptera fugiperda). In addition, we measured plant growth to investigate if, by using alternative defence mechanisms, pre-colonised plants experience a reduced performance. Rates of herbivory were higher in pre-colonised individuals. Accordingly, leaf phenolics and tannin concentrations, as well as trichome density, were higher in colonised plants. In addition, acceptability bioassays showed that S. fugiperda preferred the leaves of pre-colonised plants. Relative growth rate was not statistically different between both types of plants. Contrary to our expectation, colonised plants, besides biotic defence by ants, also had higher concentrations of secondary metabolites, higher trichome density and lower herbivory and palatability than pre-colonised plants. This suggests that pre-colonised plants may deal with herbivores by other means and that older, larger plants invest more in all defences rather than shifting defensive mechanisms with ontogeny. Since growth rate of pre-colonised plants was comparable to that of colonised plants (despite the higher levels of herbivory of the former), we suggest that plant tolerance leading to compensation may be used by pre-colonised juveniles of C. peltata MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1385-0237 UR - ISI:000186132100003 L2 - ant-plant interactions;defence;herbivory;tolerance;PLANT TOLERANCE; ANT-PLANT; HERBIVORY; AZTECA; TREE; PROTECTION; BENEFITS; TANNINS; DAMAGE SO - Plant Ecology 2003 ;169(1):35-41 7834 UI - 7274 AU - Delgado F AU - Muga JG AU - Ruschhaupt A AU - Garcia-Calderon G AU - Villavicencio J AD - UPV EHU, Dept Quim Fis, Bilbao 48080, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoDelgado, F, UPV EHU, Dept Quim Fis, Apartado 644, Bilbao 48080, Spain TI - Tunneling dynamics in relativistic and nonrelativistic wave equations AB - We obtain the solution of a relativistic wave equation and compare it with the solution of the Schrodinger equation for a source with a sharp onset and excitation frequencies below cutoff. A scaling of position and time reduces to a single case all the (below cutoff) nonrelativistic solutions, but no such simplification holds for the relativistic equation, so that qualitatively different "shallow" and "deep" tunneling regimes may be identified relativistically. The nonrelativistic forerunner at a position beyond the penetration length of the asymptotic stationary wave does not tunnel; nevertheless, it arrives at the traversal (semiclassical or Buttiker-Landauer) time tau. The corresponding relativistic forerunner is more complex: it oscillates due to the interference between two saddle-point contributions and may be characterized by two times for the arrival of the maxima of lower and upper envelopes. There is in addition an earlier relativistic forerunner, right after the causal front, which does tunnel. Within the penetration length, tunneling is more robust for the precursors of the relativistic equation MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000185716700014 L2 - FRONT PROPAGATION; EVANESCENT MEDIA; TIME; BARRIER; TRAVERSAL; VELOCITY SO - Physical Review A 2003 ;68(3): 7835 UI - 9222 AU - delson-Velsky GM AU - Gelbukh A AU - Levner E AD - Bar Ilan Univ, Dept Math & Comp Sci, Ramat Gan, IsraelNatl Polytech Inst, Ctr Res Comp, Mexico City, DF, MexicoHolon Inst Technol, Dept Comp Sci, Holon, IsraelAdelson-Velsky, GM, Bar Ilan Univ, Dept Math & Comp Sci, Ramat Gan, Israel TI - On fast path-finding algorithms in AND-OR graphs AB - We present a polynomial-time path-finding algorithm in AND-OR graphs Given p arcs and n nodes, the complexity of the algorithm is O(np) , which is superior to the complexity of previously known algorithms MH - Israel MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 1024-123X UR - ISI:000180705200002 L2 - AND-OR graphs;extremal paths;scheduling;routing;polynomial-time algorithms SO - Mathematical Problems in Engineering 2003 ;8(4-5):283-293 7836 UI - 9099 AU - Demarco IA AU - Espinosa F AU - Edwards J AU - Sosnik J AU - de la Vega-Beltran J AU - Hockensmith JW AU - Kopf GS AU - Darszon A AU - Visconti PE AD - Univ Virginia, Dept Biochem & Mol Genet, Charlottesville, VA 22908, USAUniv Virginia, Ctr Res Contracept & Reprod Hlth, Dept Cell Biol, Charlottesville, VA 22908, USAUniv Nacl Autonoma Mexico, Cuebnavaca, MexicoUniv Penn, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAVisconti, PE, Univ Massachusetts, Dept Vet & Anim Sci, Paige Labs, Amherst, MA 01003 USA TI - Involvement of a Na+/HCO3- cotransporter in mouse sperm capacitation AB - Mammalian sperm are incapable of fertilizing eggs immediately after ejaculation; they acquire fertilization capacity after residing in the female tract for a finite period of time. The physiological changes sperm undergo in the female reproductive tract that render sperm able to fertilize constitute the phenomenon of "sperm capacitation." We have demonstrated that capacitation is associated with an increase in the tyrosine phosphorylation of a subset of proteins and that these events are regulated by an HCO3-/cAMP-dependent pathway involving protein kinase A. Capacitation is also accompanied by hyperpolarization of the sperm plasma membrane. Here we present evidence that, in addition to its role in the regulation of adenylyl cyclase, HCO3- has a role in the regulation of plasma membrane potential in mouse sperm. Addition of HCO3- but not Cl- induces a hyperpolarizing current in mouse sperm plasma membranes. This HCO3--dependent hyperpolarization was not observed when Na+ was replaced by the non-permeant cation choline(+). Replacement of Na+ by choline(+) also inhibited the capacitation-associated increase in protein tyrosine phosphorylation as well as the zona pellucida-induced acrosome reaction. The lack of an increase in protein tyrosine phosphorylation was overcome by the presence of cAMP agonists in the incubation medium. The lack of a hyperpolarizing HCO3- current and the inhibition of the capacitation-dependent increase in protein tyrosine phosphorylation in the absence of Na+ suggest that a Na+/HCO3- cotransporter is present in mouse sperm and is coupled to events regulating capacitation MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 31 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000181195100049 L2 - PROTEIN-TYROSINE PHOSPHORYLATION; MEDIATED SIGNAL-TRANSDUCTION; SOLUBLE ADENYLYL-CYCLASE; ACROSOME REACTION; ZONA-PELLUCIDA; MAMMALIAN SPERM; SPERMATOGENIC CELLS; SODIUM-BICARBONATE; INTRACELLULAR PH; PLASMA-MEMBRANE SO - Journal of Biological Chemistry 2003 ;278(9):7001-7009 7837 UI - 9376 AU - Dembowski C AU - Dietz B AU - Graf HD AU - Heine A AU - Leyvraz F AU - Miski-Oglu M AU - Richter A AU - Seligman TH AD - Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, GermanyUNAM, Ctr Ciencias Fis, Mexico City, DF, MexicoDembowski, C, Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany TI - Phase shift experiments identifying Kramers doublets in a chaotic superconducting microwave billiard of threefold symmetry AB - The spectral properties of a two-dimensional microwave billiard showing threefold symmetry have been studied with a new experimental technique. This method is based on the behavior of the eigenmodes under variation of a phase shift between two input channels, which strongly depends on the symmetries of the eigenfunctions. Thereby a complete set of 108 Kramers doublets has been identified by a simple and purely experimental method. This set clearly shows Gaussian unitary ensemble statistics, although the system is time-reversal invariant MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000180318300022 L2 - QUANTUM SPECTRA; STATISTICS SO - Physical Review Letters 2003 ;90(1): 7838 UI - 9427 AU - Demeret C AU - Garcia-Carranca A AU - Thierry F AD - Inst Pasteur, Unit Gene Express & Dis, URA 1644, CNRS, F-75724 Paris 15, FranceUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City, DF, MexicoDemeret, C, Inst Pasteur, Unit Gene Express & Dis, URA 1644, CNRS, Fernbach Bldg,25 Rue Dr Roux, F-75724 Paris 15, France TI - Transcription-independent triggering of the extrinsic pathway of apoptosis by human papillomavirus 18 E2 protein AB - Cervical carcinomas are most frequently associated with human papillomaviruses (HPV), whose E6 and E7 oncogenes products induce cellular immortalization. The papillomavirus E2 protein is a transcription factor, which represses the expression of the viral oncogenes, and activates viral DNA replication during the vegetative viral cycle. This protein is specifically inactivated in HPV18-associated carcinoma cells, suggesting that E2 functions prevent carcinogenic progression. Indeed, ectopic expression of E2 in cervical carcinoma cells strongly inhibits cell proliferation. Here we show that above a threshold level of expression, the E2 protein induces apoptosis, independently of other viral functions. The amino-terminal domain is responsible for this apoptotic activity, but surprisingly with no involvement of its transcriptional functions. The death pathway triggered by E2 relies on activation of the initiator caspase 8, specific of the extrinsic pathway of apoptosis. E2 itself is cleaved by caspases during cell death, providing an example of an apoptotic inducer that is itself a target for caspase processing. The autonomous proapoptotic activity of HPV18 E2 described here may counteract the proliferative functions of viral oncogenes, and renders the inactivation of E2 crucial for carcinogenic progression MH - France MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 27 U4 - Biochemistry & Molecular Biology;Oncology;Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0950-9232 UR - ISI:000180322400002 L2 - HPV18 E2;apoptosis;caspases;extrinsic pathway;transactivation domain;CERVICAL-CARCINOMA; TRANSACTIVATION DOMAIN; CASPASE FAMILY; HELA-CELLS; TYPE-16; ACTIVATION; E6; PROLIFERATION; DEGRADATION; ONCOPROTEIN SO - Oncogene 2003 ;22(2):168-175 7839 UI - 7777 AU - Demott PJ AU - Sassen K AU - Poellot MR AU - Baumgardner D AU - Rogers DC AU - Brooks SD AU - Prenni AJ AU - Kreidenweis SM AD - Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80526, USAUniv Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775, USAUniv N Dakota, Dept Atmospher Sci, Grand Forks, ND 58201, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80307, USADeMott, PJ, Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80526 USA TI - African dust aerosols as atmospheric ice nuclei AB - [1] Measurements of the ice nucleating ability of aerosol particles in air masses over Florida having sources from North Africa support the potential importance of dust aerosols for indirectly affecting cloud properties and climate. The concentrations of ice nuclei within dust layers at particle sizes below 1 mum exceeded 1 cm(-3); the highest ever reported with our device at temperatures warmer than homogeneous freezing conditions. These measurements add to previous direct and indirect evidence of the ice nucleation efficiency of desert dust aerosols, but also confirm their contribution to ice nuclei populations at great distances from source regions MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 59 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000184599400002 L2 - UNITED-STATES; MINERAL DUST; DESERT DUST; TRANSPORT; ISRAEL SO - Geophysical Research Letters 2003 ;30(14): 7840 UI - 9079 AU - den Auwer C AU - Drot R AU - Simoni E AU - Conradson SD AU - Gailhanou M AU - de Leon JM AD - Univ Paris Sud Orsay, Inst Phys Nucl, F-91405 Orsay, FranceCEA Marcoule DEN, DRCP, SCPS, F-30207 Bagnols Sur Ceze, FranceLos Alamos Natl Lab, MST Div, Los Alamos, NM 87545, USAUniv Paris Sud Orsay, Lab Utilisat Rayonnement Electromagnet, F-91898 Orsay, FranceCINVESTAV, Dept Fis Aplicada, Mexico City 97310, DF, MexicoDen Auwer, C, Univ Paris Sud Orsay, Inst Phys Nucl, F-91405 Orsay, France TI - Grazing incidence XAFS spectroscopy of uranyl sorbed onto TiO2 rutile surfaces AB - The surface complex formed by uranyl oxocations sorbed onto rutile titanium oxide has been probed by X-ray Absorption Spectroscopy. These measurements are part of a work that aims to model the interaction between heavy metal ions and mineral surfaces in aqueous conditions. In order to de ne the orientation and structure of the oxocation complex on the surface, both polycrystalline and monocrystalline ( 110) and (001) planes of rutile TiO2 have been investigated. Polarized XANES measurements show that the uranyl rod sorbs nearly parallel to the rutile surface, although this ideal configuration must be modulated by the surface topographic defects. Site by site simulation compared to the EXAFS data suggests that two surface oxygen sites are involved: shared edge and shared summit oxygen atoms of the TiO6 octahedron. Both grazing incidence EXAFS on the ( 110) plane and isotropic EXAFS on polycrystalline TiO2 reveal comparable sorption behavior: on average, the uranyl oxocation bonds to the surface as a bidentate complex with two short oxygen distances at 2.32 Angstrom and three larger distances at 2.47 Angstrom. Grazing incidence EXAFS on the ( 001) plane shows an unexpected low signal to noise ratio due to the lower uranium uptake. Data analysis suggests the formation of an outer sphere uranium complex on this plane. The discrepancy between both plane reactivities is still not understood MH - France MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1144-0546 UR - ISI:000181210200035 L2 - RAY-ABSORPTION-SPECTROSCOPY; METAL-OXIDE SURFACES; NEAR-EDGE STRUCTURE; FINE-STRUCTURE; AQUEOUS-SOLUTION; BINDING-SITES; SORPTION; EXAFS; URANIUM; ADSORPTION SO - New Journal of Chemistry 2003 ;27(3):648-655 7841 UI - 8860 AU - Deng WY AU - Vallance BA AU - Li YL AU - Puente JL AU - Finlay BB AD - Univ British Columbia, Biotechnol Lab, Vancouver, BC V6T 1Z3, CanadaUniv Nacl Autonoma Mexico, Dept Mol Microbiol, Inst Biotecnol, Cuernavaca 62251, Morelos, MexicoFinlay, BB, Univ British Columbia, Biotechnol Lab, Room 237,Wesbrook Bldg,6174 Univ Blvd, Vancouver, BC V6T 1Z3, Canada TI - Citrobacter rodentium translocated intimin receptor (Tir) is an essential virulence factor needed for actin condensation, intestinal colonization and colonic hyperplasia in mice AB - Citrobacter rodentium infection of mice serves as a relevant small animal model to study enterohaemorrhagic Escherichia coli (EHEC) and enteropathogenic E. coli (EPEC) infections in man. Enteropathogenic E. coli and EHEC translocate Tir into the host cytoplasmic membrane, where it serves as the receptor for the bacterial adhesin intimin and plays a central role in actin condensation beneath the adherent bacterium. In this report, we examined the function of C. rodentium Tir both in vitro and in vivo . Similar to EPEC, C. rodentium Tir is tyrosine phosphorylated and is essential for actin condensation. Citrobacter Tir and EPEC Tir are functionally interchangeable and both require tyrosine phosphorylation to mediate actin rearrangements. In contrast, Citrobacter Tir supports actin nucleation in EHEC independent of tyrosine phosphorylation, while EHEC Tir cannot replace Citrobacter Tir for this function. This indicates that C. rodentium and EPEC use an actin nucleating mechanism different from EHEC. We also found that Tir is expressed and translocated into mouse enterocytes in vivo by C. rodentium during infections. This represents the first direct demonstration of a type III effector translocated in vivo into a natural host by any pathogen. In addition, we showed that Tir, but not its tyrosine phosphorylation, is essential for C. rodentium to colonize the large bowel and induce attaching/effacing (A/E) lesions and colonic hyperplasia in mice, and that both EPEC Tir and EHEC Tir can substitute for Citrobacter Tir for these activities in vivo . These results thus demonstrate that Tir is an essential virulence factor in this infection model. The data also show that the function of Tir tyrosine phosphorylation and its subsequent actin nucleating activity are not essential for C. rodentium colonization of the mouse gut nor for inducing A/E lesions and colonic hyperplasia, thereby uncoupling colonization and disease from actin condensation for this A/E pathogen MH - Canada MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 54 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000181802600009 L2 - ENTEROPATHOGENIC ESCHERICHIA-COLI; ENTEROCYTE EFFACEMENT LEE; O157-H7 REQUIRES INTIMIN; PEDESTAL FORMATION; HOST-CELLS; PATHOGENICITY ISLAND; HEP-2 CELLS; TYROSINE PHOSPHORYLATION; RABBIT INTESTINE; EPITHELIAL-CELLS SO - Molecular Microbiology 2003 ;48(1):95-115 7842 UI - 7081 AU - Dereszewska A AU - Olayo R AU - Cardoso J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoMerchant Maritime Univ, PL-81225 Gdynia, PolandOlayo, R, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Synthesis and thermal degradation of poly(n-butylisocyanate) modified by 1,3-propanesultone AB - Poly(n-butylisocyanates) were synthesized by anionic homopolymerization with the addition of sulfonate groups in the termination stage. Two types of functional polymers were obtained from different quantities of added 1,3-propanesultone (PrS). When a stoichiometric proportion of sultone is added, the reaction with poly(n-butylisocyanate) renders a mix of a nonfunctionalized (PBIC) and a telechelic polymer (PBICT). In the presence of an excess of PrS, the proportion of end-functionalized chains was higher, and a significant change in their thermal properties was observed. Polymers were characterized by FTIR and NMR, and measurements of intrinsic viscosity were made. Thermal degradation of the polymers was studied under nitrogen atmosphere for various heating rates. The kinetic parameters such as the activation energy and the reaction order were determined by using Ozawa's method. Thermal degradation analyses showed that the degradation processes depend strongly on the concentration of functional groups. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Poland PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000186374600019 L2 - poly(n-butylisocyanate);functionalization of polymers;solution properties;thermal properties;thermal decomposition;RING-OPENING POLYMERIZATION; SULFONIC-ACID SULTONE; LIQUID-CRYSTALS; ISOCYANATE); IONOMERS; BEHAVIOR; POLYMERS SO - Journal of Applied Polymer Science 2003 ;90(13):3594-3601 7843 UI - 6160 AU - Descroix L AU - Vauclin M AU - Viramontes D AU - Esteves M AU - Barrios JLG AU - Anaya E AD - UJF, INPG, CNRS,IRD, Lab Etud Transferts Hydrol & Environm, F-38041 Grenoble 9, FranceIMTA Cuernavaca, Jiutepec 62550, Morelos, MexicoCenid Raspa, Gomez Palacio 35071, Dgo, MexicoSemarnat Minist Environm, Cd Lerdo, Dgo, MexicoDescroix, L, UJF, INPG, CNRS,IRD, Lab Etud Transferts Hydrol & Environm, BP 53, F-38041 Grenoble 9, France TI - Water management in Northern Mexico: sharing resources affected by drought AB - Northern Mexico is suffering a severe drought since the beginning of 1990's. Rainfall amount was at least 25% lower than average during 8 over 11 years an the 1992-2002 period. This drought caused an "hydropolitic" problem with USA and led to drastic consequences both on agriculture and breeding. The current water scarcity is due to a plurality of processes occurred during the last years, in the historical and geographical context of this northern region. New strategies of management appeared as an adaptation to maintain the activities in spite of the drought; new activities that generate more added value with the same quantity of water were developed. Water scarcity must lead to consider drought and flood hazards. A new "'patrimonial" management must take over from the "mining-type" of natural resources in order to preserve the environment. That should avoid that land degradation continues to enhance scarcity by a reduction in water reserves of soils MH - France MH - Mexico|Durango MH - Mexico|Morelos PB - PARIS: SOCIETE HYDROTECHNIQUE FRANCE RP - NOT IN FILE U3 - TC 0 U4 - Water Resources U5 - J;Article AV - French IS - 0018-6368 UR - ISI:000188966700006 L2 - WESTERN SIERRA-MADRE SO - Houille Blanche-Revue Internationale de l Eau 2003 ;(6):46-52 7844 UI - 7640 AU - Desnoues N AU - Lin M AU - Guo XW AU - Ma LY AU - Carreno-Lopez R AU - Elmerich C AD - CNRS, URA D2172, Inst Pasteur, Paris, FranceChinese Acad Agr Sci, Biotechnol Res Inst, Beijing, Peoples R ChinaUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoCNRS, UPR 2355, Inst Sci Vegetal, F-91198 Gif Sur Yvette, FranceHuazhong Agr Univ, Inst Life Sci & Technol, Wuhan, Peoples R ChinaBeijing Agr Univ, Natl Lab Agrobiotechnol, Beijing 100094, Peoples R ChinaElmerich, C, CNRS, URA D2172, Inst Pasteur, Paris, France TI - Nitrogen fixation genetics and regulation in a Pseudomonas stutzeri strain associated with rice AB - The Pseudomonas stutzeri strain A1501 (formerly known as Alcaligenes faecalis) fixes nitrogen under microaerobic conditions in the free-living state and colonizes rice endophytically. The authors characterized a region in strain A1501, corresponding to most of the nif genes and the rnf genes, involved in electron transport to nitrogenase in Rhodobacter capsulatus. The region contained three groups of genes arranged in the same order as in Azotobacter vinelandii: (1) nifB fdx ORF3 nifQ ORF5 ORF6; (2) nifLA-rnfABCDGEF-nifY21-nafY; (3) ORF13 ORF12-nifHDK-nifTY ORF1 ORF2-nifEN. Unlike in A. vinelandii, where these genes are not contiguous on the chromosome, but broken into two regions of the genome, the genes characterized here in P. stutzeri are contiguous and present on a 30 kb region in the genome of this organism. Insertion mutagenesis confirmed that most of the nif and the rnf genes in A1501 were essential for nitrogen fixation. Using lacZ fusions it was found that nif and rnf gene expression was under the control of ntrBC, nifLA and rpoN and that the rnf gene products were involved in the regulation of the nitrogen fixation process MH - France MH - Mexico|Morelos MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000184846300032 L2 - AZOSPIRILLUM-BRASILENSE SP7; NIFL-NIFA COMPLEX; AZOTOBACTER-VINELANDII; RHODOBACTER-CAPSULATUS; NUCLEOTIDE-SEQUENCE; KLEBSIELLA-PNEUMONIAE; ALCALIGENES-FAECALIS; MOLECULAR ANALYSIS; ESCHERICHIA-COLI; CLONING VECTORS SO - Microbiology-Sgm 2003 ;149():2251-2262 7845 UI - 7277 AU - Deville JG AU - Adler S AU - Azimi PH AU - Jantausch BA AU - Morfin MR AU - Beltran S AU - Edge-Padbury B AU - Naberhuis-Stehouwer S AU - Bruss JB AD - Univ Calif Los Angeles, Sch Med, Los Angeles, CA 90024, USAChildrens Med Ctr, Richmond, VA, USAChildrens Hosp Oakland, Oakland, CA, USAChildrens Natl Med Ctr, Washington, DC 20010, USAHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoFdn Santa Fe Bogoto, Bogota, ColombiaPharmacia Corp, Kalamazoo, MI, USADeville, JG, Univ Calif Los Angeles, Sch Med, Los Angeles, CA 90024, USA TI - Linezolid versus vancomycin in the treatment of known or suspected resistant Gram-positive infections in neonates AB - Background. Gram-positive infections caused by susceptible and resistant strains of Staphylococcus aureus, coagulase-negative staphylococci and enterococci are increasing problems in neonates. Linezolid, a new oxazolidinone, is active against these pathogens and has recently been approved by the Food and Drug Administration for treating Gram-positive infections in pediatric patients. Objective. To compare the clinical efficacy and safety of intravenous and oral linezolid with vancomycin (10 to 15 mg/kg every 6 to 24 h) in neonates (age 0 to 90 days). Methods. Hospitalized infants with known or suspected hospital-acquired pneumonia, complicated skin or skin structure infections, bacteremia or other infections (e.g. pyelonephritis, abdominal abscess) were eligible. Test-of-cure clinical response was evaluated at follow-up. Results. Sixty-three neonates, randomized 2:1 to linezolid (n = 43) or vancomycin (n = 20) were included in the intent-to-treat group. Clinical cure rates at follow-up in the intent-to-treat group were higher, but not significantly different, for linezolid vs. vancomycin (78% vs. 61%; P = 0.196). Corresponding cure rates in clinically evaluable patients were 84% vs. 77% (P = 0.553) for linezolid and vancomycin, respectively. Pathogen eradication rates were as follows in the linezolid and vancomycin groups, respectively: S. aureus (67% vs. 60%; P = 0.850); coagulase-negative staphylococci (88% vs. 100%; P = 0.379); and enterococci (71% vs. 0%; P = 0.168). Results for hematology and chemistry assays were similar between treatment groups. Fewer linezolid-treated neonates had drug-related adverse events than vancomycin-treated neonates (12% vs. 32%; P = 0.058). Conclusions. Linezolid is well-tolerated and as effective as vancomycin in the treatment of resistant Gram-positive infections in neonates MH - Colombia MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 8 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000185805300003 L2 - linezolid;neonates;resistant Gram-positive infections;IN-VITRO ACTIVITIES; OXAZOLIDINONE ANTIBACTERIAL AGENTS; INTENSIVE-CARE-UNIT; STAPHYLOCOCCUS-AUREUS; CHILDREN; BACTEREMIA; ENTEROCOCCI; EMERGENCE; U-100592; U-100766 SO - Pediatric Infectious Disease Journal 2003 ;22(9):S158-S163 7846 UI - 7075 AU - Diacu F AU - Perez-Chavela E AD - Univ Victoria, Pacific Inst Math Sci, Victoria, BC V8W 3P4, CanadaUniv Victoria, Dept Math & Stat, Victoria, BC V8W 3P4, CanadaUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoDiacu, F, Univ Victoria, Pacific Inst Math Sci, POB 3045, Victoria, BC V8W 3P4, Canada TI - On the dynamics of the Langmuir problem AB - We study the dynamics of an invariant set of the classical Coulomb atom, which generalizes the one Langmuir proposed for helium in 1921. The n electrons are positioned at the vertices of a regular polygon that changes size homothetically, while the nucleus moves along a line orthogonal through the centre of the polygon. Our main result is that for negative energy the equations of motion have infinitely many periodic solutions MH - Canada MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000186283100008 L2 - 2-ELECTRON ATOMS SO - Journal of Physics A-Mathematical and General 2003 ;36(34):9053-9066 7847 UI - 9410 AU - Diaz AR AU - Tchernykh A AU - Ecker KH AD - Tech Univ Clausthal, Inst Informat, D-38678 Clausthal Zellerfeld, GermanyUniv Baja California, Tijuana, MexicoCICESE, Res Ctr, Ensenada, Baja California, MexicoEcker, KH, Tech Univ Clausthal, Inst Informat, Julius Albert Str 4, D-38678 Clausthal Zellerfeld, Germany TI - Algorithms for dynamic scheduling of unit execution time tasks AB - We analyze performance properties of list scheduling algorithms. under various dynamic assumptions and different levels of knowledge available for scheduling, considering the case of unit execution time tasks. We focus on bounds for the ISF (immediate successors first) and MISF (maximum number of immediate successors first) scheduling strategies and show the difference from other bounds obtained for the same problem. Finally, we present case studies and experimental results to assess the average behavior. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0377-2217 UR - ISI:000180346100014 L2 - scheduling;list scheduling;worst case analysis;on-line scheduling;UET;RESOURCE SO - European Journal of Operational Research 2003 ;146(2):403-416 7848 UI - 7102 AU - Diaz C AU - Salgado S AU - Jordan R AU - Cruz E AU - Zayas ME AD - Univ Autonoma Baja California, Sch Chem & Engn, Mexicali 21100, Baja California, MexicoCaribe Glass Factory, Havana, CubaComplejo Ind Chihuahua, Ctr Adv Mat Res, Chih, MexicoUniv Sonora, Ctr Phys Res, Hermosillo, Sonora, MexicoDiaz, C, Univ Autonoma Baja California, Sch Chem & Engn, Mexicali 21100, Baja California, Mexico TI - Glass-ceramics made from anodizing plant, industrial waste AB - It is possible to obtain glass-ceramic materials of commercial compositions from residues of anodizing plants MH - Cuba MH - Mexico|Baja California MH - Mexico|Chihuahua MH - Mexico|Sonora PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7812 UR - ISI:000186328200006 L2 - CRYSTALLIZATION SO - American Ceramic Society Bulletin 2003 ;82(9):9601-9604 7849 UI - 8646 AU - Diaz JG AU - Kozisek J AU - Langer V AD - Slovak Univ Technol, Dept Phys Chem, SK-81237 Bratislava, SlovakiaTechnol Inst Morelia, Dept Mat, Morelia, Michoacan, MexicoChalmers Univ Technol, Dept Environm Inorgan Chem, SE-41296 Gothenburg, SwedenKozisek, J, Slovak Univ Technol, Dept Phys Chem, Radlinskeho 9, SK-81237 Bratislava, Slovakia TI - Bis(cyanamidonitrato-kappa N)[tris(3,5-dimethylpyrazole)copper(II) AB - The title compound, [Cu(CN3O2)(2)(C5H8N2)(3)], is the first example of a pentacoordinated 3d-central atom involving the cyanamidonitrate ligand. The crystal structure is formed by neutral molecues stabilized by a three-dimensional network consisting of one intramolecular and three intermolecular hydrogen bonds. The Cu atom is pentacoordinated by three N-donor atoms from 3,5-dimethylpyrazole neutral ligands and two N-donor atoms from cyanamidonitrate anions MH - Mexico|Michoacan MH - Slovakia MH - Sweden PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 1 U4 - Crystallography U5 - J;Article AV - English IS - 1600-5368 UR - ISI:000182561700016 L2 - X-RAY CRYSTALLOGRAPHY; GRAPH-SET ANALYSIS; IMIDAZOLE LIGANDS; COMPLEXES; COORDINATION; TRICYANOMETHANIDE; PSEUDOHALIDES; PATTERNS SO - Acta Crystallographica Section E-Structure Reports Online 2003 ;59():M241-M243 7850 UI - 7671 AU - Diaz M AU - Rosado JL AU - Allen LH AU - Abrams S AU - Garcia OP AD - Univ Autonoma Queretaro, Fac Ciencias Nat, Queretaro 76176, Queretaro, MexicoUniv Calif Davis, Dept Nutr, Davis, CA 95616, USABaylor Coll Med, USDA, ARS, Childrens Nutr Res Ctr,Dept Pediat, Houston, TX, USARosado, JL, Univ Autonoma Queretaro, Fac Ciencias Nat, Clavel 200,Prados Capilla, Queretaro 76176, Queretaro, Mexico TI - The efficacy of a local ascorbic acid-rich food in improving iron absorption from Mexican diets: a field study using stable isotopes AB - Background: One potentially sustainable approach to improving iron status at the community level is to encourage the consumption of local ascorbic acid-rich foods, in conjunction with meals high in nonheme iron. Objective: The study, conducted in rural Mexico, measured stable isotopes of iron to evaluate the effect on iron absorption of the addition of 25 mg ascorbic acid as agua de limon (limeade) to 2 typical meals per day for 2 wk. Design: Fifteen nonpregnant, nonlactating, iron-deficient (ferritin < 12 mug/L) women ((x) over bar +/- SD age: 28.3 +/- 7.7 y) fasted overnight and were brought to a community clinic. After an initial blood sample, subjects consumed 0.25 mg Fe-57 with both breakfast and lunch for 14 d. On day 29, another blood sample was taken, and a reference dose of 2.7 mg Fe-58 with 25 mg ascorbic acid was given. For the following 15 d, participants consumed 0.25 mg Fe-57 added to both breakfast and lunch with 25 mg ascorbic acid added to each meal as limeade. A final blood sample was taken on day 59. Results: Iron absorption was calculated from recovery of isotopes in blood obtained 14 d after administration of each isotope. When 25 mg ascorbic acid as limeade was added to test meals twice a day for 2 wk, iron absorption increased significantly (P < 0.001) in every subject: the mean absorption rose from 6.6 +/- 3.0% to 22.9 +/- 12.6%. Conclusions: The consumption of 25 mg ascorbic acid as limeade twice daily with meals substantially improved iron absorption and may improve the iron status of nonpregnant, nonlactating, iron-deficient women MH - Mexico|Queretaro MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 8 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000184904900013 L2 - iron absorption;bioavailability;ascorbic acid;stable isotopes;Mexican diet;BIOAVAILABILITY; WOMEN; INFANTS; STORES; SUPPLEMENTATION; PREGNANCY; CHILDREN SO - American Journal of Clinical Nutrition 2003 ;78(3):436-440 7851 UI - 7050 AU - Diaz RJ AU - Dottori H AU - Vera-Villamizar N AU - Carranza G AD - Univ Nacl Cordoba, Astron Observ, RA-5000 Cordoba, ArgentinaUniv Nacl Cordoba, Secretaria Ciencia & Tecnol, RA-5000 Cordoba, ArgentinaUniv Fed Rio Grande Sul, Inst Fis, BR-91501970 Porto Alegre, RS, BrazilInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoConsejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, ArgentinaDiaz, RJ, Univ Nacl Cordoba, Astron Observ, Laprida 854, RA-5000 Cordoba, Argentina TI - Circumnuclear structures in the interacting Seyfert galaxy NGC 1241: Kinematics and optical/infrared morphology AB - We studied the spiral pattern in the inner 6."5 (1"=257 pc) central regions of the interacting active nucleus galaxy NGC 1241 using Gemini North Telescope high-resolution K-s- and J-band images and Hubble Space Telescope (HST) Paalpha and H- and (V+R)-band images with high resolution in the range from similar to0."1 to similar to0."3 along with intermediate to large-scale spectroscopy using the Multifunction Spectrograph at the Cordoba Observatory in Argentina. Our analysis of Paalpha emission images revealed a faint two-armed leading spiral pattern ending in the 5."6x3."4 clumpy ring discovered by Boker and coworkers, harboring a 1."6 long bar-like structure almost perpendicular to the large-scale bar of NGC 1241. When we applied two-dimensional Fourier analysis at circumnuclear scales, we found that a two-arm trailing mode was dominant in K-s- and J-band images while the (V+R)-band images showed more complex structural features with a strong one-armed trailing mode. One-dimensional Fourier analysis showed a corotation (CR) located outward from the edge of the Paalpha bar. Our kinematics data gave an angular speed Omega(CN) of 350+/-50 km s(-1) kpc(-1) for the trailing mode pattern. The rotation curve showed that the circumnuclear ring is located just inside the large-scale pattern inner Lindblad resonance (ILR), which has a radius of about rsimilar to1 kpc. We also found, within the uncertainties present in such measurements, that the outer Lindblad resonance (OLR) of the circumnuclear pattern is coincident with the large-scale pattern ILR, indicating a possible connection between circumnuclear and global dynamics. Nevertheless, the estimated high molecular gas fraction (greater than or equal to13%) and the inner pattern high angular speed at the central region of NGC 1241 point to a nuclear bar formation via self-gravitational instability MH - Argentina MH - Brazil MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186432700018 L2 - galaxies : active;galaxies : individual (NGC 1241) galaxies : kinematics and dynamics;galaxies : spiral;galaxies : structure;methods : numerical;techniques : spectroscopic;SPIRAL GALAXIES; DISK GALAXIES; BARRED GALAXIES; NUCLEAR RINGS; STELLAR DISK; BARS; GAS; REGIONS; ARMS; CLASSIFICATION SO - Astrophysical Journal 2003 ;597(2):860-869 7852 UI - 8246 AU - Dickson JL AU - Psathas PA AU - Salinas B AU - Ortiz-Estrada C AU - Luna-Barcenas G AU - Hwang HS AU - Lim KT AU - Johnston KP AD - Pukyung Natl Univ, Div Image & Informat Engn, Pusan 608739, South KoreaUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Iberoamer, Dept Ciencias, Mexico City 01210, DF, MexicoCINVESTAV, Unidad Queretaro, Lab Invest Mat, Queretaro 76230, MexicoLim, KT, Pukyung Natl Univ, Div Image & Informat Engn, Pusan 608739, South Korea TI - Formation and growth of water-in-CO2 miniemulsions AB - We report nonflocculated dilute water-in-CO2 (W/C) miniemulsions stable for 24 h in contrast with flocculated unstable macroemulsions reported previously. The surfactants, poly(1,1-dihydroperfluorooctyl methacrylate)-b-poly(ethylene oxide) (PFOMA-b-PEO), were synthesized by atom transfer radical polymerization to achieve the proper hydrophilic-CO2-philic balance (HCB) and a low interfacial tension (similar to0.2-2 mN/m) between water and CO2. The average particle diameter, ranging from 70 to 140 nm, was measured with multiwavelength turbidimetry utilizing Mie theory, and the interfacial tension was measured with high pressure pendant drop tensiometry. Because flocculation and coalescence were suppressed nearly completely, it became feasible to investigate emulsion droplet formation and droplet growth by Ostwald ripening. Droplet formation was characterized as a function of the mechanical energy at various CO2 densities and temperatures and was correlated quantitatively to the interfacial tensions. The molar water/surfactant ratios reached 1170, in contrast with values of only about 5-60 for W/C microemulsions. The ability to stabilize nanometer-sized miniemulsion droplets with large water/surfactant ratios is of great practical interest in reactions, separations, and materials formation processes in CO2 MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - South Korea MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000183410400007 L2 - SUPERCRITICAL-CARBON-DIOXIDE; ANGLE NEUTRON-SCATTERING; TRANSFER RADICAL POLYMERIZATION; INVERSION TEMPERATURE METHOD; NONIONIC SURFACTANT; INTERFACIAL-TENSION; WATER MINIEMULSIONS; EMULSION FORMATION; PHASE-BEHAVIOR; MICROEMULSIONS SO - Langmuir 2003 ;19(12):4895-4904 7853 UI - 8402 AU - DiGirolamo AM AU - Neufeld L AU - Rivera J AU - Ramakrishnan U AU - de Cossio TG AU - Martorell R AD - Emory Univ, Rolllins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322, USANatl Publ Hlth Inst, Ctr Res Nutr & Hlth, Cuernavaca, Morelos, Mexico TI - Nutritional predictors of gross motor milestones among children in Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181733103361 SO - Faseb Journal 2003 ;17(4):A714-A714 7854 UI - 7178 AU - Dikranjan D AU - Tkachenko M AD - Univ Udine, Dipartimento Matemat & Informat, I-33100 Udine, ItalyUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoDikranjan, D, Univ Udine, Dipartimento Matemat & Informat, Via Sci 206, I-33100 Udine, Italy TI - Algebraic structure of small countably compact Abelian groups AB - Under Martin's Axiom, we completely characterize the algebraic structure of Abelian groups of the size c that admit a countably compact Hausdorff group topology. It turns out that, in the torsion case, these are exactly the groups that admit a pseudocompact Hausdorff group topology, but this is no more valid for non-torsion Abelian groups. The algebraic constraints for the existence of a countably compact Hausdorff group topology on an Abelian group G of size c are relatively simple: for every integer n, the subgroup G[n] = {x is an element of G : nx = 0} of G has to be finite or satisfy \G[n]\ = c. The same has to hold true for the subgroup dG[n], where d is any divisor of n. In addition, if G is non-torsion, then the free rank r(G) of G must be equal to c MH - Italy MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0933-7741 UR - ISI:000186094400001 L2 - PSEUDOCOMPACT GROUPS; TOPOLOGICAL GROUPS SO - Forum Mathematicum 2003 ;15(6):811-837 7855 UI - 7446 AU - Dirksen RT AU - O'Connell KMS AU - Avila G AD - Univ Rochester, Rochester, NY 14642, USAIPN, CINVESTAV, Mexico City 07360, DF, Mexico TI - Identification of a primary molecular locus for EC uncoupling in central core disease (CCD) MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123800082 SO - Biophysical Journal 2003 ;84(2):18A-18A 7856 UI - 6016 AU - Dirzo R AU - Raven PH AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoMissouri Bot Garden, St Louis, MO 63166, USADirzo, R, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, Mexico TI - Global state of biodiversity and loss AB - Biodiversity, a central component of Earth's life support systems, is directly relevant to human societies. We examine the dimensions and nature of the Earth's terrestrial biodiversity and review the scientific facts concerning the rate of loss of biodiversity and the drivers of this loss. The estimate for the total number of species of eukaryotic organisms possible lies in the 5-15 million range, with a best guess of similar to7 million. Species diversity is unevenly distributed; the highest concentrations are in tropical ecosystems. Endemisms are concentrated in a few hotspots, which are in turn seriously threatened by habitat destruction-the most prominent driver of biodiversity loss. For the past 300 years, recorded extinctions for a few groups of organisms reveal rates of extinction at least several hundred times the rate expected on the basis of the geological record. The loss of biodiversity is the only truly irreversible global environmental change the Earth faces today MH - Mexico|Distrito Federal MH - USA PB - PALO ALTO: ANNUAL REVIEWS RP - NOT IN FILE U3 - TC 35 U4 - Environmental Sciences;Environmental Studies U5 - J;Article AV - English IS - 1543-5938 UR - ISI:000220102700005 L2 - biodiversity hotspots;endemism;extinction;species diversity;species threatening;TRIFOLIUM-REPENS; SPECIES RICHNESS; BIRD EXTINCTIONS; NORTH-AMERICA; DIVERSITY; FOREST; POPULATION; PLANTS; DEFORESTATION; HOTSPOTS SO - Annual Review of Environment and Resources 2003 ;28():137-167 7857 UI - 8661 AU - Djenane D AU - Sanchez-Escalante A AU - Beltran JA AU - Roncales P AD - Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, Zaragoza 50013, SpainCtr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoRoncales, P, Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, C Miguel Servet 177, Zaragoza 50013, Spain TI - Extension of the shelf life of beef steaks packaged in a modified atmosphere by treatment with rosemary and displayed under UV-free lighting AB - Fresh beef steaks, either sprayed on the surface with a solution of rosemary and vitamin C or not sprayed, were pack aged in 70%O2+ 20%CO2+ 10%N-2 and displayed at 1 +/- 1 degreesC without illumination or illuminated by a standard fluorescent lamp, a low-UV, colour-balanced lamp (Promolux(R)), or the fluorescent lamp with a UV filter. Metmyoglobin formation, lipid oxidation (2-thiobarbituric acid reactive substances), instrumental colour (CIE L*, a*, b*), psychrotrophic bacterial counts (PCA) and sensory discolouration and off-odour were determined. Results showed that the use of the antioxidant mixture of rosemary and vitamin C together with the absence of UV radiation significantly reduced the rates of metmyoglobin formation and lipid oxidation, as well as microbial growth, and extended the display life from about 10 to about 20 days. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Sonora MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 26 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0309-1740 UR - ISI:000182325100012 L2 - beef;modified atmosphere;display life;lighting;UV radiation;antioxidants;rosemary;ALPHA-TOCOPHEROL; ASCORBIC-ACID; OXIDATIVE STABILITY; LIPID STABILITY; VITAMIN-C; GROUND-BEEF; COLOR; MEAT; ANTIOXIDANTS; IMPROVEMENT SO - Meat Science 2003 ;64(4):417-426 7858 UI - 9345 AU - Djenane D AU - Sanchez-Escalante A AU - Beltran JA AU - Roncales P AD - Univ Zaragoza, Lab Food Technol, Dept Anim Prod & Food Sci, Fac Vet Sci, E-50013 Zaragoza, SpainCtr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoRoncales, P, Univ Zaragoza, Lab Food Technol, Dept Anim Prod & Food Sci, Fac Vet Sci, C Miguel St,177, E-50013 Zaragoza, Spain TI - The shelf-life of beef steaks treated with DL-lactic acid and antioxidants and stored under modified atmospheres AB - Beef steaks were treated with 1.5% lactic acid alone or supplemented with antioxidants (0.1% rosemary extract and 0.05% ascorbic acid). The steaks were stored under modified atmospheres containing either 60% O-2/40% CO2 or 70% O-2/20% CO2/10% N-2. Both the 40% CO2 atmosphere and the lactic acid treatment significantly (P<0.05) inhibited growth of lactic acid bacteria, Brochothrix thermosphacta and Pseudomonas spp. Neither CO2 in the pack atmosphere, treatment with lactic acid, nor a combination of both, affected formation of thiobarbituric acid reactive substances, myoglobin oxidation, or CIE a* values. However, treatment with antioxidants significantly (P < 0.05) delayed oxidation of both myoglobin and lipids, and so extended the storage-life. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Sonora MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Biotechnology & Applied Microbiology;Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0740-0020 UR - ISI:000180519700001 L2 - DL-lactic acid;antioxidants;beef steaks;CARBON-DIOXIDE; ALPHA-TOCOPHEROL; PORK; STORAGE; OXYGEN; MEAT; DECONTAMINATION; MICROFLORA; EXTENSION; VACUUM SO - Food Microbiology 2003 ;20(1):1-7 7859 UI - 8384 AU - Djordjevic MA AU - Chen HC AU - Natera S AU - Van Noorden G AU - Menzel C AU - Taylor S AU - Renard C AU - Geiger O AU - Weiller GF AD - Australian Natl Univ, Res Sch Biol Sci, Genom Interact Grp, Canberra, ACT 2601, AustraliaINRA, Lab Genet Cellulaire, F-31326 Castanet Tolosan, FranceUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Morelos, MexicoDjordjevic, MA, Australian Natl Univ, Res Sch Biol Sci, Genom Interact Grp, GPO Box 475, Canberra, ACT 2601, Australia TI - A global analysis of protein expression profiles in Sinorhizobium meliloti: Discovery of new genes for nodule occupancy and stress adaptation AB - A proteomic examination of Sinorhizobium meliloti strain 1021 was undertaken using a combination of 2-D gel electrophoresis, peptide mass fingerprinting, and bioinformatics. Our goal was to identify (i) putative symbiosis- or nutrientstress-specific proteins, (ii) the biochemical pathways active under different conditions, (iii) potential new genes, and (iv) the extent of posttranslational modifications of S. meliloti proteins. In total, we identified the protein products of 810 genes (13.1% of the genome's coding capacity). The 810 genes generated 1,180 gene products, with chromosomal genes accounting for 78% of the gene products identified (18.8% of the chromosome's coding capacity). The activity of 53 metabolic pathways was inferred from bioinformatic analysis of proteins with assigned Enzyme Commission numbers. Of the remaining proteins that did not encode enzymes, ABC-type transporters composed 12.7% and regulatory proteins 3.4% of the total. Proteins with up to seven transmembrane domains were identified in membrane preparations. A total of 27 putative nodule-specific proteins and 35 nutrient-stress-specific proteins were identified and used as a basis to define genes and describe processes occurring in S. meliloti cells in nodules and under stress. Several nodule proteins from the plant host were present in the nodule bacteria preparations. We also identified seven potentially novel proteins not predicted from the DNA sequence. Post-translational modifications such as N-terminal processing could be inferred from the data. The posttranslational addition of UMP to the key regulator of nitrogen metabolism, PII, was demonstrated. This work demonstrates the utility of combining mass spectrometry with protein arraying or separation techniques to identify candidate genes involved in important biological processes and niche occupations that may be intransigent to other methods of gene expression profiling MH - Australia MH - France MH - Mexico|Morelos PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 41 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000182965500005 L2 - iron sequestering;MALDI-TOF mass spectrometry;molecular networks;Nex18;reactive oxygen species;TspO;SYMBIOTIC NITROGEN-FIXATION; DIFFERENTIALLY DISPLAYED PROTEINS; RHIZOBIUM-LEGUME SYMBIOSIS; ESCHERICHIA-COLI; MASS-SPECTROMETRY; EXOPOLYSACCHARIDE SYNTHESIS; SEQUENCE; ALFALFA; IDENTIFICATION; NODULATION SO - Molecular Plant-Microbe Interactions 2003 ;16(6):508-524 7860 UI - 6920 AU - Djordjevic SV AU - Jeon IH AU - Han YM AD - CIMAT, Guanajuato 36420, GTO, MexicoEwha Womans Univ, Dept Math, Seoul 120750, South KoreaUniv Iowa, Dept Math, Iowa City, IA 52242, USADjordjevic, SV, CIMAT, Apdo Postal 402, Guanajuato 36420, GTO, Mexico TI - Weyl's theorem for operators with tacked spectra AB - In this paper we study Weyl's theorem and some related materials for operators with tacked spectra which are introduced by K. B. Laursen and M. Mbekhta MH - Mexico|Guanajuato MH - South Korea MH - USA PB - NEW DELHI: INDIAN NAT SCI ACAD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0019-5588 UR - ISI:000186591000002 L2 - local spectral theory;Weyl's theorem;operator with tacked spectrum SO - Indian Journal of Pure & Applied Mathematics 2003 ;34(9):1299-1305 7861 UI - 8845 AU - Dobrokhotov SY AU - Zhevandrov PN AD - Russian Acad Sci, Inst Problems Mech, Moscow 117526, RussiaUniv Michoacana, Escuela Ciencias Fisicomatemat, Morelia 58060, Michoacan, MexicoDobrokhotov, SY, Russian Acad Sci, Inst Problems Mech, Pr Vernadskogo 101, Moscow 117526, Russia TI - Asymptotic expansions and the Maslov canonical operator in the linear theory of water waves. I. Main constructions and equations for surface gravity waves AB - The aim of this paper is to systematically present the main ideas and constructions of the Maslov operator theory and semiclassical asymptotic methods in connection with an example of linear equations of the theory of water waves. In Western literature these methods axe also known as microlocal analysis and methods based on Fourier integral operators. These methods work for the cases in which the wave fields under consideration rapidly oscillate or rapidly change, including the case in which their amplitudes abruptly increase at some points or on some curves (at focal points and on caustics). Applying these methods, we construct global analytic (asymptotic) formulas for the wave fields and study these formulas, which turns out to be much simpler than the immediate computer investigation of the wave fields. Although the related mathematical constructions axe well known and are presented in many monographs and papers, they still seem too complicated for direct use in practical applications. Our goal is to present them in as elementary way as possible from the point of view of applications. In this part we introduce the main constructions and illustrate them by an example of the linear equations for waves on the surface of a heavy fluid MH - Mexico|Michoacan MH - Russia PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 1061-9208 UR - ISI:000181621500001 SO - Russian Journal of Mathematical Physics 2003 ;10(1):1-31 7862 UI - 7056 AU - Domenech M AU - Vazquez GV AU - Cantelar E AU - Lifante G AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainCtr Invest Opt, Guanajuato 37000, MexicoDomenech, M, Univ Autonoma Madrid, Dept Fis Mat, C-4, E-28049 Madrid, Spain TI - Continuous-wave laser action at lambda=1064.3 nm in proton- and carbon-implanted Nd : YAG waveguides AB - This work reports continuous laser oscillation at lambda=1064.3 nm at room temperature in Nd:YAG planar waveguides fabricated by two different techniques: proton implantation with a multi-implant of energies around 1 MeV and carbon implantation with a single-implant at an energy of 7 MeV. Threshold powers of 11 and 22 mW and slope efficiencies of 7% and 9% were achieved in the proton- and carbon-implanted guides, respectively. The laser outputs show a very high stability operating in cw regime at room temperature. (C) 2003 American Institute of Physics MH - Mexico|Guanajuato MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 13 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000186523400010 SO - Applied Physics Letters 2003 ;83(20):4110-4112 7863 UI - 7989 AU - Dominguez-Cherit J AU - Garcia C AU - Vega-Memije ME AU - Arenas R AD - Hosp Manuel Gea Gonzalez, Dept Dermatol, Mexico City, DF, MexicoUniv Oklahoma, Hlth Sci Ctr, Dermatol Surg Unit, Dept Dermatol, Oklahoma City, OK, USAGarcia, C, Univ Oklahoma, Hlth Sci Ctr, Dermatol Surg & Cutaneous Oncol Unit, Dept Dermatol, 619 NE 13th St, Oklahoma City, OK 73104 USA TI - Pseudo-fibrokeratoma: An unusual presentation of subungual squamous cell carcinoma in a young girl AB - An interesting case of subungueal squamous cell carcinoma in a 13-year-old girl is presented. The tumor presented as a pseudofibrokeratoma with melanonychia on the index finger. Biopsy was diagnostic and treatment consisted of Mohs micrographic surgery and secondary intention wound healing. This is one of the youngest patients ever reported with subungueal squamous cell carcinoma, and there is only one more case of pseudofibrokeratoma and melanonychia reported as initial skin lesions MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 1 U4 - Dermatology;Surgery U5 - J;Editorial Material AV - English IS - 1076-0512 UR - ISI:000184007100021 L2 - MOHS MICROGRAPHIC SURGERY; BOWENS-DISEASE; NAIL UNIT SO - Dermatologic Surgery 2003 ;29(7):788-789 7864 UI - 8559 AU - Dominguez-Espinosa RM AU - Webb C AD - Univ Manchester, Inst Sci & Technol, Dept Chem Engn, Satake Ctr Grain Proc Engn, Manchester M60 1QD, Lancs, EnglandDominguez-Espinosa, RM, Univ Autonoma Yucatan, Fac Chem Engn, Av Juarez No 421,Cd Ind Merida, Yucatan 97288, Mexico TI - Submerged fermentation in wheat substrates for production of Monascus pigments AB - Cereal grains are normally used as solid substrates for the production of Monascus metabolites. However, solid fermentation in these substrates requires complex control systems, whereas in liquid culture the control of the fermentation is simpler and consequently significant reductions in fermentation times can be achieved. In the same way, the use of submerged culture can benefit the production of many secondary metabolites and decrease production costs by reducing the labour involved in solid-state methods. A flour composed of a mixed variety of Canadian hard wheat was used as sole nutrient source to produce the pigments of Monascus purpureus Went (IMI 210765). Supplementation with NH4Cl promoted biomass and orange dye formation, whereas the use of zinc sulphate favoured red dyes production. In submerged fermentations significant differences in final pigment yields were observed in the use of wheat-based broth at different concentrations in the presence of bran particles and/or gluten protein. It has been found that the viscosity of the broth had a significant effect on the growth morphology and production of pigments. Gluten-free wheat. our at concentrations of 3 - 5% was found to be the most suitable for liquid Monascus culture. The subsequent use of passive immobilization of Monascus served to enhance red pigment yields and to facilitate the downstream processing of the dyes MH - United Kingdom MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000182605900016 L2 - immobilization;Monascus;pigments;secondary metabolites;wheat flour;FUNGUS MONASCUS; SHAKEN CULTURE; PURPUREUS SO - World Journal of Microbiology & Biotechnology 2003 ;19(3):329-336 7865 UI - 7906 AU - Dominguez H AU - Patrykiejew A AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Inst Chem, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Fac Chem, PL-20031 Lublin, PolandDominguez, H, Univ Nacl Autonoma Mexico, Inst Chem, Mexico City 04510, DF, Mexico TI - Molecular dynamics study of the formation of small crystallites of Lennard-Jones particles in slit-like pores with (100) fcc walls AB - Canonical ensemble molecular dynamics is used to investigate the formation of small crystallites in slit-like pores with crystalline walls of (100) fcc symmetry. We study the influence of the pore width and the energetic parameters of the fluid particle-pore wall potential on the structure of the frozen droplets. We analyse the density profiles, in-plane radial distribution functions, in-plane diffusion coefficients, the distributions of Voronoi polygons, as well as the snapshots of consecutive configurations MH - Mexico|Distrito Federal MH - Poland PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000184158800009 L2 - DENSITY-FUNCTIONAL THEORY; CENTERED-CUBIC CRYSTALS; SIMPLE CLASSICAL FLUID; CANONICAL MONTE-CARLO; CAPILLARY CONDENSATION; PHASE-TRANSITIONS; COMPUTER-SIMULATIONS; GRAPHITIC MICROPORES; SOLVATION FORCES; CONFINED FLUIDS SO - Molecular Physics 2003 ;101(12):1867-1882 7866 UI - 8178 AU - Dominguez H AU - Lee BH AU - Vlachy V AU - Pizio O AD - Univ Ljubljana, Fac Chem & Chem Technol, Ljubljana 1001, SloveniaUNAM, Inst Quim, Mexico City 04510, DF, MexicoVlachy, V, Univ Ljubljana, Fac Chem & Chem Technol, Askerceva 5,POB 537, Ljubljana 1001, Slovenia TI - Adsorption of electrolyte in a templated hard-sphere matrix. Predictions of the continuum replica Ornstein-Zernike approach AB - Thermodynamic and structural properties of the primitive model of size asymmetric 1-1 electrolyte solutions in a disordered hard-sphere matrix environment mimicking a microporous adsorbent were studied. The influence of the hard-sphere template on the adsorption properties of the material was analyzed. The numerical results of our study follow from the application of the replica Ornstein-Zernike integral equations, complemented by the hypernetted chain closure. Two different electrolyte models were examined with parameters mimicking lithium and sodium chloride solutions. The excess chemical potential for adsorbed electrolyte in an untemplated and a templated hard-sphere matrix was studied. Steric effects due to matrix confinement are known to have substantial influence on the properties of the annealed electrolyte. Our results showed the hard-sphere template produces a distribution of obstacles which increases the adsorption of electrolyte compared to the untemplated matrix case. The results were explained with regard to the pair-distribution functions for the various interaction pairs. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovenia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000183470900002 L2 - randomly disordered solids;hard-sphere template;elecrolytes;adsorption isotherm;replica Ornstein-Zernike integral equation;INTEGRAL-EQUATION THEORY; ION-ION CORRELATIONS; ELECTRONEUTRAL CHARGED MATRICES; POROUS-MEDIA; ASSOCIATING ELECTROLYTES; FLUID DISTRIBUTIONS; DISORDERED MATRICES; ARBITRARY MATRICES; HYPERNETTED-CHAIN; PHASE-EQUILIBRIUM SO - Physica A-Statistical Mechanics and Its Applications 2003 ;324(3-4):469-483 7867 UI - 8605 AU - Dominguez R AU - Cruz-Morales SE AU - Carvalho MC AU - Xavier M AU - Brandao ML AD - UNAM, Fac Estudios Super Zaragoza, Unidad Invest Biol Reprod, Mexico City, DF, MexicoUSP, FFCLRP, Dept Psicobgia, Lab Psicobiol, Ribeirao Preto, BrazilUNAM, Fac Estudios Super Iztacala, Div Invest & Posgrado, Mexico City, DF, MexicoDominguez, R, UNAM, Fac Estudios Super Zaragoza, Unidad Invest Biol Reprod, AP 9-020,CP 5000, Mexico City, DF, Mexico TI - Effect of steroid injection to newborn rats on serotonin activity in frontal cortex and raphe AB - The effects of injecting testosterone propionate or estradiol benzoate to newborn rats on dopaminergic and serotoninergic activity in the frontal cortex, dorsal and median raphe nucleus were analyzed when animals reached adulthood. High performance liquid chromatography was used to measure tissue levels of dopamine, serotonin and its metabolites. Activity was calculated as the metabolite/neurotransmitter ratio. An increase in androgen or estrogen levels at birth caused a significant decrease in serotoninergic activity in the frontal cortex and in the dorsal raphe nucleus, without causing apparent changes in dopaminergic activity; serotinergic activity in the median raphe nucleus was not affected. The results suggest that the transmission of DA and 5-HT in these structures are differentially influenced by early androgenization or estrogenization MH - Brazil MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000182554200014 L2 - GONADAL-HORMONES; FEMALE RATS; BRAIN; DORSAL; REPLACEMENT; BEHAVIOR; ANXIETY; NUCLEUS; SITES SO - Neuroreport 2003 ;14(4):597-599 7868 UI - 9175 AU - Domrachev GA AU - Shevelev YA AU - Zakharov LN AU - Domracheva LG AU - Domracheva EG AD - Russian Acad Sci, Razuvaev Inst Organometall Chem, Nizhnii Novgorod 603600, RussiaUniv Michoacana San Nicolas Hidalgo, Morelia, Michoacan, MexicoRussian Acad Sci, Inst Microstruct Phys, Nizhnii Novgorod 603600, RussiaDomrachev, GA, Russian Acad Sci, Razuvaev Inst Organometall Chem, Ul Tropinina 49, Nizhnii Novgorod 603600, Russia TI - The role of symmetry and spatial shielding of metal by ligands in the biological activity of organometallic and coordination compounds MH - Mexico|Michoacan MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0012-5008 UR - ISI:000181053300005 SO - Doklady Chemistry 2003 ;388(1-3):17-18 7869 UI - 7230 AU - Dong SH AU - Gu XY AU - Ma ZQ AU - Yu J AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - The Klein-Gordon equation with a Coulomb potential in D dimensions AB - The solutions of the Klein-Gordon equation with a Coulomb potential in D dimensions are obtained exactly, and the energy levels E (n, l, D) are analytically presented. The dependence of the energy difference DeltaE(n, l, D) for D and D - 1 on the dimension D is demonstrated as three different kinds of rules. The dependence of the energy E(n, l, D) on the dimension D is also analyzed. It is shown that the energy E(n, l, D) (l not equal 0) is almost independent of the quantum number 1, while E(n, 0, D) first decreases and then increases as the dimension D increases. There is no bound state of the S-wave for D = 2 MH - Mexico|Distrito Federal MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0218-3013 UR - ISI:000185956400008 L2 - Klein-Gordon equation;Coulomb potential;dimension D;HYDROGEN-ATOM; ANGULAR-MOMENTUM; QUANTUM; QUANTIZATION; SCHRODINGER; PARTICLE; SPHERE; FIELD; SPACE SO - International Journal of Modern Physics E-Nuclear Physics 2003 ;12(4):555-565 7870 UI - 7425 AU - Dong SH AU - Sun GH AU - Popov D AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Syst, Mexico City 01000, DF, MexicoUniv Politehn timisoara, Dept Phys, Timisoara 1900, RomaniaUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoDong, SH, Inst Mexicano Petr, Programa Ingn Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Group theory approach to the Dirac equation with a Coulomb plus scalar potential in D+1 dimensions AB - We generalize the Dirac equation to D+1 space-time. The conserved angular momentum operators and their quantum numbers are discussed. The eigenfunctions of the total angular momentums are calculated for both odd D and even D cases. The exact solutions of the D+1-dimensional radial equations of the Dirac equation with a Coulomb plus scalar potential are analytically presented by studying the Tricomi equations obtained from a pair of coupled first-order ones. The eigenvalues are also discussed in some detail. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Romania PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000185421900006 SO - Journal of Mathematical Physics 2003 ;44(10):4467-4479 7871 UI - 8320 AU - Dong SH AU - Ma ZQ AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoCCAST, World Lab, Beijing 100080, Peoples R ChinaDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - Exact solutions to the Dirac equation with a Coulomb potential in 2+1 dimensions AB - The (2 + 1)-dimensional Dirac equation with a Coulomb potential is investigated by studying a second-order differential equation obtained from a pair of coupled first-order ones. The solutions of the bound states expressed by the confluent hypergeometric functions are analytically obtained. The energy levels and their fine structures are also presented. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000183213900013 L2 - Dirac equation;Coulomb potential;two dimensions;HYDROGEN-ATOM; 2 DIMENSIONS; SCATTERING; FIELD SO - Physics Letters A 2003 ;312(1-2):78-83 7872 UI - 6997 AU - Dorantes-Davila J AU - Dreysse H AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Strasbourg 1, Inst Phys & Chim Mat, Strasbourg, FranceUniv Toulouse 3, Phys Quant Lab, CNRS, F-31062 Toulouse, FranceDorantes-Davila, J, Univ Autonoma San Luis Potosi, Inst Fis, Alvaro Obregon 64, San Luis Potosi, Mexico TI - Magnetic anisotropy of transition-metal interfaces from a local perspective: Reorientation transitions and spin-canted phases in Pd capped Co films on Pd(111) AB - Layer-resolved self-consistent electronic calculations of magnetic anisotropy energy (MAE) provide new insight to the off-plane magnetization observed in Pd capped Co films on Pd(111). We demonstrate that the transition from perpendicular to in-plane phases with increasing film thickness involves an intermediate spin-canted phase. The interfaces responsible for the stability of the off-plane easy axes are characterized microscopically. A local analysis of the MAEs reveals an unexpected internal magnetic structure of the Co-Pd interfaces in which the magnetic moments and spin-orbit interactions at the Pd atoms play a crucial role MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000186422700044 L2 - PERPENDICULAR ANISOTROPY; NI FILMS; DEPENDENCE; MONOLAYER; CU(001) SO - Physical Review Letters 2003 ;91(19): 7873 UI - 8760 AU - Dorta-Contreras AJ AU - Noris-Garcia E AU - Escobar-Perez X AU - Duenas-Flores A AU - Mena-Lopez R AD - Fac Ciencias Med Dr Miguel Enriquez, Lab Cent Liquido Cefalorraquideo, Havana, CubaInst Nacl Oncol & Radiobiol, Havana, CubaHosp Pediat San Miguel Padron, Havana, CubaCINVESTAV, IPN, Dept Fisiol Biofis & Neurociencias, Mexico City 14000, DF, Mexico TI - IgG subclasses intrathecal synthesis patterns in eosinophilic meningoencephalitis due to Angiostrongylus cantonensis AB - Introduction. There is a growing interest to know the characteristics of meningoencephalitis due to Angiostrongylus cantonensis because of it is an emergent disease. Objective. To describe the intrathecal synthesis pattern of IgG subclasses in pediatric patients suffering from eosinophilic meningoencephalitis due to Angiostrongylus cantonensis. Patients and methods. Ten pediatric patients with the disease were studied. During the firs diagnostic lumbar puncture an eosinophilic pleocitosis was found. Simultaneously a serum sample was taken. Eight days later, a second lumbar and venous puncture was performed. To every serum and cerebrospinal fluid sample IgA, IgM, IgG, albumin and the four subclasses of IgG were quantified by immunodiffusion and a differential cell count. Results. During the first diagnostic lumbar puncture, all the cases had blood-cerebrospinal fluid barrier dysfunction with absence of immunoglobulins intrathecal synthesis with a mean of 450 x 10(6) cells/L and 48% of eosinophils average. In the second lumbarpunction there was a 40% patients with dysfunction of the blood-cerebrospinal fluid barrier and with a synthesis pattern IgA+IgM+IgG in the 50% o patients and with IgA+IgG in four patients. The synthesis pattern Of IgG subclasses was IgG(1)+IgG(2) in six patients, IgG(1)+IgG(2)+IgG(3) in one patient, IgG(1)+IgG(2)+IgG(4) in one more patient and two patients without intrathecal synthesis. Conclusion. The intrathecal synthesis pattern of IgG subclasses can contribute to eosinophilic meningoencephalitis diagnosis due to Angiostrongylus cantonensis MH - Cuba MH - Mexico|Distrito Federal PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000181959700002 L2 - albumin;Angiostrongylus cantonensis;blood-cerebrospinal fluid barrier;cerebrospinal fluid;eosinophilic meningoencephalitis;IgG subclasses;intrathecal synthesis;CEREBROSPINAL-FLUID; MENINGITIS; ANTIBODIES; BARRIER SO - Revista de Neurologia 2003 ;36(6):506-509 7874 UI - 6811 AU - dos Santos AB AU - Cervantes FJ AU - Yaya-Beas RE AU - van Lier JB AD - Univ Wageningen & Res Ctr, Sub Dept Environm Technol, NL-6700 EV Wageningen, NetherlandsInst Tecnol Sonora, Dept Ciencias Agua & Med Ambiente, Obregon 85000, Sonora, Mexicodos Santos, AB, Univ Wageningen & Res Ctr, Sub Dept Environm Technol, POB 8129,Bomenweg 2, NL-6700 EV Wageningen, Netherlands TI - Effect of redox mediator, AQDS, on the decolourisation of a reactive azo dye containing triazine group in a thermophilic anaerobic EGSB reactor AB - The feasibility of thermophilic (55 degreesC) anaerobic treatment applied to colour removal of a triazine contained reactive azo dye was investigated in two 0.531 expanded granular sludge blanket (EGSB) reactors in parallel at a hydraulic retention time (HRT) of 10 h. Generally, this group of azo dyes shows the lowest decolourisation rates during mesophilic anaerobic treatment. The impact of the redox mediator addition on colour removal rates was also evaluated. Reactive Red 2 (RR2) and anthraquinone-2,6-disulfonate (AQDS) were selected as model compounds for azo dye and redox mediator, respectively. The reactors achieved excellent colour removal efficiencies with a high stability, even when high loading rates of RR2 were applied (2.7 g RR2 l(-1) per day). Although AQDS addition at catalytic concentrations improved the decolourisation rates, the impact of AQDS on colour removal was less apparent than expected. Results show that the AQDS-free reactor R2 achieved excellent colour removal rates with efficiencies around 91%, compared with the efficiencies around 95% for the AQDS-supplied reactor R1. Batch experiments confirmed that the decolourisation rates were co-substrate dependent, in which the volatile fatty acids (VFA) mixture was the least efficient co-substrate. The highest decolourisation rate was achieved in the presence of either hydrogen or formate, although the presence of glucose had a significant impact on the colour removal rates. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Sonora MH - Netherlands PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 14 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-0229 UR - ISI:000186886500010 L2 - azo dye;triazine group;colour removal;thermophilic;anaerobic;redox mediator;AQDS;GRANULAR SLUDGE; METHANOGENIC SLUDGE; WASTE-WATER; DEGRADATION; DETOXIFICATION; BIODEGRADATION; TRANSFORMATION; TEMPERATURE; REDUCTION; QUINONES SO - Enzyme and Microbial Technology 2003 ;33(7):942-951 7875 UI - 8728 AU - Dostal J AU - Vozar J AU - Keppie JD AU - Hovorka D AD - St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaGeol Survey Slovak Republ, Bratislava 81704, SlovakiaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoComenius Univ, Dept Petrol & Mineral, Bratislava 84215, SlovakiaDostal, J, St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, Canada TI - Permian volcanism in the Central Western Carpathians (Slovakia): Basin-and-Range type rifting in the southern Laurussian margin AB - The 1,500- to 2,000-m-thick Permian volcano-sedimentary Maluzina Formation of the uppermost nappe of the Central Western Carpathians (a segment of the Alpine-Carpathian orogenic belt) occurs in several fault blocks distributed across Slovakia. This unit is a part of a post-Variscan overstep suite that followed accretion of the Gothic terranes to Laurussia. It consists of three upward-fining megacycles of semi-arid/arid, fluvial-lacustrine clastic redbeds and local dolomites and evaporites. Abundant intercalated volcanic rocks are predominantly mafic lava flows; volcaniclastic rocks and dykes are subordinate. Felsic rocks are represented by rare volcanic-lastics and dykes. Compositionally, the mafic rocks are rift-related continental tholeiites with enriched light REE patterns having (La/Yb)(n) ratios between 2 and 5.5 and with mantle-normalized patterns characterized by negative Nb-Ta anomalies. The rocks were derived from subcontinental lithospheric mantle and were affected by crustal contamination. It is inferred that the volcanism of the Malukind Formation formed in a Basin and Range tectonic setting in which rifting followed collision of the Palaeo-Tethys ridge with the trench bordering southern Laurussia. This model can be applied to other Permian volcanic suites of rift basins in the Eastern Alps and Carpathians over a strike-length of about 1,000 km, which indicates the width of the slab window MH - Canada MH - Mexico|Distrito Federal MH - Slovakia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1437-3254 UR - ISI:000182205200003 L2 - geochemistry;Permian;rifting;volcanology;Western Carpathians;PETROGENESIS; ORIGIN; EVOLUTION; ELEMENT; ISLAND; SERIES; BELT SO - International Journal of Earth Sciences 2003 ;92(1):27-35 7876 UI - 7203 AU - Dowling PM AU - Lopez HS AD - Western Coll Vet Med, Western Ctr Canadian gFARAD, Saskatoon, SK, CanadaUniv Nacl Autonoma Mexico, Fac Med Vet, Dept Fisiol & Farmacol, Mexico City 04510, DF, MexicoDowling, PM, Western Coll Vet Med, Western Ctr Canadian gFARAD, 52 Campus Dr, Saskatoon, SK, Canada TI - International perspectives in clinical pharmacology: Canada and Mexico AB - This article reviews clinical pharmacology in food animal production in Canada and Mexico. The authors discuss topics such as drug availability, the drug-approval process, availability (prescription or over-the-counter) of drugs to producers, withdrawal times, and extralabel drug use. Drugs that are prohibited and proactive measures for drug use in Canadian food animals also are reviewed MH - Canada MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0749-0720 UR - ISI:000186009700010 L2 - ENROFLOXACIN SO - Veterinary Clinics of North America-Food Animal Practice 2003 ;19(3):707-+ 7877 UI - 6059 AU - Dreisigacker S AU - Zhang P AU - Warburton ML AU - van Ginkel M AU - Hoisington D AU - Bohn M AU - Melchinger AE AD - Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyUniv Illinois, Dept Crop Sci, Urbana, IL 61801, USACIMMYT, Mexico City, DF, MexicoMelchinger, AE, Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany TI - SSR and pedigree analyses of genetic diversity among CIMMYT wheat lines targeted to different megaenvironments AB - Improved bread wheat (Triticum aestivum L.) cultivars for diverse agroecological environments are important for success in the effort to increase food production. In the 1980s, CIMMYT introduced the megaenvironment (ME) concept to breed wheats specifically adapted to different areas. Our objective was to analyze the genetic diversity among 68 advanced CIMMYT wheat lines targeted to different MEs by using 99 simple sequence repeats (SSRs) and the coefficient of parentage (COP). The average number of alleles detected was higher for the 47 genomic SSRs (5.4) than for the 52 SSRs derived from expressed sequence tags (EST) (3.3), but gene diversity between MEs was similar for both types of markers. No significant differences among the five MEs were observed for the means of SSR-based genetic similarities (GS), calculated as 1 - Rogers' distance, and COP values. Both measures showed a low correlation (r = 0.43). High levels of genetic diversity were found within the germplasm targeted to each ME. However, principle coordinate analysis based on modified Rogers' distances did not separate the genotypes according to their targeted MEs. We conclude that presence of a single core germplasm can reflect large phenotypic differences. A sufficient number of diverse breeding lines for each ME is required because MEs generally combine various production areas. SSRs represent a powerful tool to quantify genetic diversity in wheat, but genotypic differentiation for adaptation to specific MEs in the CIMMYT program could not be proven MH - Germany MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 17 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000189384600002 L2 - TRITICUM-AESTIVUM L.; MICROSATELLITE MARKERS; GERMPLASM; BARLEY; POLYMORPHISMS; DNA; TRINUCLEOTIDE; ADAPTATION; SEQUENCES; DISTANCE SO - Crop Science 2003 ;44(2):381-388 7878 UI - 7894 AU - Drewien RC AU - Terrazas AL AU - Taylor JP AU - Barraza JMO AU - Shea RE AD - Univ Idaho, Hornocker Wildlife Inst, Rigby, ID 83442, USAUniv Autonoma Chihuahua, Adm Correos 4 28, Chihuahua 31000, MexicoUS Fish & Wildlife Serv, Bosque Apache Natl Wildlife Refuge, Socorro, NM 87801, USADrewien, RC, Univ Idaho, Hornocker Wildlife Inst, 3346 E 200th N, Rigby, ID 83442 USA TI - Status of lesser snow geese and Ross's geese wintering in the Interior Highlands of Mexico AB - During winters 1998 and 1999 we surveyed, by air or ground, 145 wetland areas in 8 states of the Mexican Interior Highlands for lesser snow geese (Chen caerulescens caerulescens) and Ross's geese (C. rossii, hereafter both species are jointly referred to as light geese). Only limited data were available on abundance, distribution, habitat use, and species composition of light geese flocks wintering in the Mexican Interior Highlands. We surveyed wetlands from the northern border of Chihuahua southward >1,400 km into the states of Jalisco and Michoacan. During ground surveys we visually sampled geese to assess species, color phase, and age composition (n=60,967). In 1998, drought in the northern Highlands left many natural wetlands dry or nearly dry; wetland water levels farther south were generally low. In 1999 water levels improved in the northern Highlands but drought prevailed in the southern Highlands. During 1998 and 1999 we recorded 229,288 and 310,204 light geese, respectively, at 58 wetlands in 5 states. Combining our counts with the midwinter inventories in the United States provided estimates of 465,653 and 447,729 light geese wintering in the western Central Flyway during 1998 and 1999, respectively, or 76-83% higher than the previous peak estimate in winter 1993. Most light geese (95%) were in the northern states of Chihuahua and Durango. Species ratios, weighted by flock size, showed 78.5% and 81.2% snow geese (1.3-1.5% blue phase) and 21.5% and 18.8% Ross's geese during winters 1998 and 1999, respectively. Population estimates by species included 180,100 and 252,000 snow geese and 49,200 and 58,200 Ross's geese for the 2 winters, respectively. Ross's geese were most abundant in Chihuahua, and their proportion in flocks declined southward. We observed higher proportions of Ross's geese and blue-phase snow geese than were reported in this region during the 1980s. Primary foraging sites for light geese were corn, oats, and sorghum fields. We observed little waterfowl hunting, and opportunities to increase harvest of light geese, if desired in the future, appear limited due to restrictive hunting regulations, especially for foreigners. Changing land uses and crop patterns could adversely affect the future quality and quantity of some winter habitats for light geese and other migratory birds in Mexico. Only combined counts in Mexico and the United States can reliably assess the population status of western Central Flyway light geese; 15 surveys during 1969-99 showed that an average of 60.6% of the population wintered in Mexico MH - USA MH - Mexico|Chihuahua PB - BETHESDA: WILDLIFE SOC RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Zoology U5 - J;Article AV - English IS - 0091-7648 UR - ISI:000184165500012 L2 - Chen c. caerulescens;Chen rossii;Chihuahua;distribution;Durango;interior Gighlands;lesser snow geese;Mexico;Ross's geese;status;winter populations;NORTH-AMERICA; ALASKA; GOOSE SO - Wildlife Society Bulletin 2003 ;31(2):417-432 7879 UI - 8318 AU - Drummond H AU - Torres R AU - Krishnan VV AD - Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 4510, DF, MexicoSan Francisco State Univ, Dept Engn, San Francisco, CA 94132, USADrummond, H, Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Apartado Postal 70-275, Mexico City 4510, DF, Mexico TI - Buffered development: Resilience after aggressive subordination in infancy AB - Do aggressive dominance and subordination in vertebrate broods and litters affect development? We examined 1,167 fledglings from two-chick broods of the blue-footed booby (Sula nebouxii), a species in which the first-hatched chick dominates with violent attacks throughout the nestling period and subordinates suffer lower fledging success, but if both broodmates survive, they grow to the same size. There was little evidence that dominant fledglings were more likely to recruit into the breeding population than were subordinate fledglings, and there was no evidence that dominant and subordinate recruits differed in their age, date, brood size, or nest success at first reproduction or in their summed brood sizes or total nest success over the first 5 yr or first 10 yr of life. Compared with dominants, subordinate fledglings were less prejudiced by late hatching and established clutches earlier over the first 10 yr, and subordinate recruits had 33% larger broods over the first 5 yr. However, in broods where both chicks fledged, accumulated reproductive success for chicks up to age 5 yr was similar for dominants and subordinates. Exercising dominance throughout infancy apparently does not fortify a chick for the future and may incur a long-term cost, and suffering violent subordination throughout infancy has little or no prejudicial effect and may even steel a chick for adult life MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0003-0147 UR - ISI:000183276900008 L2 - dominance;siblings;infants;broods;development;booby;BLUE-FOOTED BOOBY; SEXUAL SIZE DIMORPHISM; SIBLING AGGRESSION; AGONISTIC BEHAVIOR; NATAL DISPERSAL; CARRION CROWS; SPOTTED HYENA; NESTLINGS; DOMINANCE; COMPETITION SO - American Naturalist 2003 ;161(5):794-807 7880 UI - 6678 AU - Drzewiecki J AU - gado-Licon E AU - Haruenkit R AU - Pawelzik E AU - Martin-Belloso O AU - Park YS AU - Jung ST AU - Trakhtenberg S AU - Gorinstein S AD - Hebrew Univ Jerusalem, Hadassah Med Sch, Sch Pharm, Dept Med Chem & Nat Prod, IL-91120 Jerusalem, IsraelPlant Breeding & Acclimatizat Inst, Radizkow, PolandTechnol Int Durango, Dept Chem & Biochem, Durango, MexicoKing Mondkut Inst Technol, Fac Agr Technol, Dept Agr Ind, Bangkok, ThailandUniv Gottingen, Inst Agr Chem, D-3400 Gottingen, GermanyUniv Lleida, UTPV, CeRTA, Dept Food Technol, Lleida, SpainMokpo Natl Univ, Dept Hort Sci, Muan, South KoreaMokpo Natl Univ, Dept Food Engn, Muan, South KoreaKaplan Med Ctr, Rehovot, IsraelGorinstein, S, Hebrew Univ Jerusalem, Hadassah Med Sch, Sch Pharm, Dept Med Chem & Nat Prod, POB 12065, IL-91120 Jerusalem, Israel TI - Identification and differences of total proteins and their soluble fractions in some pseudocereals based on electrophoretic patterns AB - Genetic diversity and relationships of 11 species and cultivars belonging to different Angiosperms families were examined using sodium dodecyl sulfate seed protein markers. The protein was resolved into 36 bands (for soybean), 41 (for quinoa), 35 (for buckwheat), and 28 to 39 bands of Amaranth species, respectively. All species and cultivars can be distinguished from each other. Soybean, quinoa, and buckwheat species had a characteristic protein pattern showing a high degree of polymorphism. The protein patterns of soybean were considerably different from other species. Amaranth species had similar seed protein electrophoretic profile. The similarity coefficients calculated on the basis of presence and absence of bands ranged from 0.08 to 0.97. Following the UPGMA algorithm of similarity coefficients, the examined species and varieties could be clustered into two similarity groups. Our results did not confirm the Tachtadzjan hypothesis that Polygonales (e.g., buckwheat) and Caryophyllales (e.g., quinoa and amaranth) are closely related. Our data rather indicate occurrence of significant genetic distance (similarity coefficients 0.05-0.10). Also, it is doubtful that amaranth and quinoa species are also closely related (similarity coefficients varied from 0.16 to 0.25). It seems that soybean, quinoa, buckwheat, and amaranth (as a genus) can be considered as phylogenetic distant taxa. Differences and similarities in the secondary structure were observed by circular dichroism spectra. Some similarity was found between these plants in their soluble protein fractions and amino acid composition. These plants can be a substitution of each other as well as for cereals MH - Germany MH - Israel MH - Mexico|Durango MH - Poland MH - South Korea MH - Spain MH - Thailand PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000187278500048 L2 - plants;proteins;properties;identification;differences;spectroscopy;FAGOPYRUM-ESCULENTUM MOENCH; AMARANTHUS-CRUENTUS SEEDS; AMINO-ACID-COMPOSITION; STRUCTURAL STABILITY; CIRCULAR-DICHROISM; BUCKWHEAT; QUINOA; CHENOPODIUM; GLOBULINS; QUALITY SO - Journal of Agricultural and Food Chemistry 2003 ;51(26):7798-7804 7881 UI - 6899 AU - Duarte-Mermoud MA AU - Mendez-Miquel JM AU - Castro-Linares R AU - Castillo-Facuse A AD - Univ Chile, Dept Elect Engn, Santiago, ChileIPN, CINVESTAV, Dept Elect Engn, Mexico City 07738, DF, MexicoDuarte-Mermoud, MA, Univ Chile, Dept Elect Engn, Santiago, Chile TI - Adaptive passivation with time-varying gains of mimo nonlinear systems AB - This paper addresses the adaptive passivation of multi-input multi-output (MIMO) non-linear systems, with unknown parameters. The class of MIMO non-linear systems considered here has an explicit linear parametric uncertainty and it is made equivalent to a passive system by means of an adaptive controller with adaptive laws specially designed, which include suitable time-varying gains. The solution presented here is an extension of that obtained by the authors for single-input single-output (SISO) systems. The proposed algorithm was applied, at simulation level, to models of dynamical MIMO systems, to exemplify the controller design methodology and to observe the adaptive system behavior MH - Chile MH - Mexico|Distrito Federal PB - BRADFORD: EMERALD GROUP PUBLISHING LIMITED RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0368-492X UR - ISI:000186599000009 L2 - cybernetics;non-linear control systems;FEEDBACK; PASSIVITY; STABILIZATION SO - Kybernetes 2003 ;32(9-10):1342-1368 7882 UI - 9015 AU - Duarte-Quiroga RA AU - Calixto S AU - Lougnot DJ AD - Ctr Invest & Opt, Leon 37000, Gto, MexicoUniv Haute Alsace, Dept Photochim Gen, F-68200 Mulhouse, FranceDuarte-Quiroga, RA, Ctr Invest & Opt, Apartado Postal 1-948, Leon 37000, Gto, Mexico TI - Optical characterization and applications of a dual-cure photopolymerizable system AB - The optical response of a photopolymerizable formulation consisting of a bisphenol A epoxy acrylate oligomer, a divinyl ether, and a photoinitiator system containing Rose Bengal was studied by recording holographic gratings. This blend is sensitive to blue-green light. Single- and double-exposure volume phase holograms were recorded. In addition to these examples, surface depth measurements were made by means of a holographic contour technique. (C) 2003 Optical Society of America MH - France MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000181465900002 L2 - RECORDING MATERIALS; DIFFUSION-MODEL SO - Applied Optics 2003 ;42(8):1417-1425 7883 UI - 7774 AU - Duarte-Vazquez MA AU - Whitaker JR AU - Rojo-Dominguez A AU - Garcia-Almendarez BE AU - Regalado C AD - Univ Autonoma Queretaro, PROPAC, Fac Quim, Dept Invest & Posgrado Alimentos, Queretaro 76010, Qro, MexicoUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USAUniv Autonoma Metropolitana Iztapalapa, Deleg Iztapalapa, Mexico City 09340, DF, MexicoRegalado, C, Univ Autonoma Queretaro, PROPAC, Fac Quim, Dept Invest & Posgrado Alimentos, CU Cerro Las Campanas S-N, Queretaro 76010, Qro, Mexico TI - Isolation and thermal characterization of an acidic isoperoxidase from turnip roots AB - An acidic peroxiclase (pl similar to 2.5) was purified from turnip roots (TAP), and its thermal properties were evaluated. TAP is a monomeric protein having a molecular weight (MW) of 49 kDa and a carbohydrate content accounting for 18% of the MW. The yield of pure TAP was relatively high (similar to2 mg/kg of fresh roots), with a specific activity of 1810 2,2'-azinobis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) units/ mg at pH 6. The activity increased 4-fold at the optimum pH (4.0) to 7250 ABTS units/mg, higher than that of most peroxidases. TAP was heat stable; heat treatment of 25 min at 60 degreesC resulted in 90% initial activity retention, whereas an activity of 20% was retained after 25 min of heating at 80 degreesC. TAP regained 85% of its original activity within 90 min of incubation at 25 degreesC, following heat treatment at 70 degreesC for 25 min. Thermal inactivation caused noticeable changes in the heme environment as evaluated by circular dichroism and visible spectrophotometry. TAP was rapidly denatured by heating in the presence of 1.0 mM ethylene glycol bis(beta-aminoethyl ether) N,N,N',N'-tetraacetic acid, but the Soret band and activity were fully recovered by adding an excess of Ca2+. This is further evidence that Ca2+ plays an important role in the stability of TAP. The high specific activity of TAP, together with its relatively high thermal stability, has high potential for applications in which a thermally stable enzyme is required MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000184635500042 L2 - peroxidase isoenzymes;protein purification;thermal characterization;HORSERADISH-PEROXIDASE; CYTOCHROME-C; PURIFICATION; INACTIVATION; STABILITY; KINETICS; ISOENZYMES; REGENERATION; REACTIVATION; TEMPERATURE SO - Journal of Agricultural and Food Chemistry 2003 ;51(17):5096-5102 7884 UI - 9213 AU - Duarte-Vazquez MA AU - Garcia-Almendarez BE AU - Rojo-Dominguez A AU - Whitaker JR AU - rroyave-Hernandez C AU - Regalado C AD - Univ Autonoma Queretaro, Fac Quim, PROPAC, Dept Invest & Posgrad Alimentos, Queretaro 76010, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 96616, USARegalado, C, Univ Autonoma Queretaro, Fac Quim, PROPAC, Dept Invest & Posgrad Alimentos, CU Cerro Campanas S-N, Queretaro 76010, Mexico TI - Monosaccharide composition and properties of a deglycosylated turnip peroxidase isozyme AB - A neutral peroxidase isozyme (TP) purified from turnip (Brassica napus L. var. purple top white globe) was partially deglycosylated, using chemical and enzymatic treatment. A 32% carbohydrate removal was achieved by exposing TP to a mixture of PNGase F, O-glycosidase, NANase, GALase III and HEXase I, while m-periodate treatment removed about 88% of TP carbohydrate moiety. The glycoprotein fraction of the TP contained a relatively high mannose and fucose content (37 and 31%, w/w, respectively), 16% (w/w) galactose, and 15% (w/w) GlcNAc. Thus, the carbohydrate moiety was classified as a hybrid type. Partially deglycosylated TP had reduced activity (by 50-85%), was more susceptible to proteolysis, and showed a slight decrease in thermostability compared to the native enzyme. Circular dichroism studies strongly suggested that although the carbohydrate moiety of TP did not influence the conformation of the polypeptide backbone, its presence considerably enhanced protein conformational stability toward heat. Removal of oligosaccharide chains from TP caused a decrease in K-m and V-max for hydrogen peroxide. Native and chemically deglycosylated TP were similarly immunodetected by rabbit polyclonal antibodies raised against TP. The results suggest that the carbohydrate moiety of TP is important for peroxidase activity and stability. (C) 2003 Published by Elsevier Science Ltd MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000180768800002 L2 - Brassica napus L. var. purple top white globe;Cruciferae;turnip peroxidase;enzymatic deglycosylation;chemical deglycosylation;PEANUT PEROXIDASE; CIRCULAR-DICHROISM; CRYSTAL-STRUCTURE; STABILITY; GLYCOSYLATION; OLIGOSACCHARIDES; GLYCOPROTEINS; GLYCOBIOLOGY; RESOLUTION; INHIBITION SO - Phytochemistry 2003 ;62(1):5-11 7885 UI - 6494 AU - Duarte MLB AU - Jasso AR AU - Allen NS AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoManchester Metropolitan Univ, Chem & Mat Dept, Manchester M1 5GD, Lancs, EnglandDuarte, MLB, Ctr Invest Quim Aplicada, Blvd Enrique Reyna H 140, Saltillo 25100, Coahuila, Mexico TI - Evaluation of novel derivatives of 2,2-dimethyl-1,3-diaminopropane as thermal and UV stabilizers in medium-density polyethylene films AB - Novel oligoalkylenamines (Additive A2) were obtained by the reaction between 2,2-dichloropropane and 1,3-diamino-2,2-dimethylpropane. The presence of partially hindered amine groups in the product was confirmed by NMR. The amines were evaluated as thermal and UV stabilizers in medium-density polyethylene (MDPE) films containing Irganox 1330 (PEA2Ir), Chimassorb 944 (PEA2CH), or a mixture of Irganox 1330 and Chimassorb 944 (PEA2M) by following changes in the concentration of carbonyl groups in the IR region of 1718 cm(-1). Under UV aging, the amine mixture A2 interacts with Chimassorb 944 in a synergistic way that is explained by the quenching of charge transfer complexes. Under thermal aging, a synergistic effect was observed in formulations containing Irganox 1330. It is still not clear if alkyl ethers of hydroxylamines from A2 are more stable at 100degreesC or if their nitroxyl radicals are more reactive than the corresponding species from Chimassorb 944 MH - United Kingdom MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Materials Science, Textiles;Polymer Science U5 - J;Article AV - English IS - 0193-7197 UR - ISI:000187952100008 L2 - AMINE LIGHT STABILIZERS; STABLE NITROXYL RADICALS; HINDERED AMINES; PHOTOSTABILIZING ACTIVITY; POLYMER STABILIZATION; SINGLET OXYGEN; MECHANISMS; OXIDATION; POLYPROPYLENE; ANTIOXIDANT SO - Journal of Vinyl & Additive Technology 2003 ;9(4):205-211 7886 UI - 6748 AU - Dubrovsky JG AU - Ivanov VB AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62250, Morelos, MexicoRussian Acad Sci, KA Timiryazev Plant Physiol Inst, Moscow 127276, RussiaDubrovsky, JG, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, AP 510-3, Cuernavaca 62250, Morelos, Mexico TI - Celebrating 50 years of the cell cycle - To round off a year of scientific commemoration, let's raise a glass to Howard and Pelc MH - Mexico|Morelos MH - Russia PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0028-0836 UR - ISI:000187342000021 SO - Nature 2003 ;426(6968):759-759 7887 UI - 8980 AU - Duda Y AU - Vakarin E AU - Alejandre J AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoNAS Ukraine, Inst Condensed Matter Phys, UA-79011 Lvov, UkraineUPMC, ENSCP, LECA, F-75231 Paris, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoDuda, Y, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent L Cardenas 152, Mexico City 07730, DF, Mexico TI - Stability and interfacial properties of confined nonadditive hard-sphere binary mixture AB - Monte-Carlo simulations are performed to investigate fluid-fluid phase equilibria and interfacial properties of nonadditive hard-sphere binary mixtures adsorbed in a slit pore. The behavior of critical density with wall separation and a nonadditive parameter is analyzed using mean field theory and simulations. The mixtures exhibit phase separation with the critical density rho(c) larger than its bulk counterpart. It is found that rho(c) decreases by increasing both the pore width H and the nonadditive parameter. The mean-field-like perturbation theory predicts rho(c) - rho(bulk)(c) similar to H-1; for large H and small rho(c), good agreement with simulation is found. The phase diagram, density profile, and interfacial tension are also obtained using different simulation methods. Interfacial tension, gamma, increases with the nonadditive parameter for a given total density and H. The effect of confining is to increase gamma for a given nonadditive parameter. A coupling between pore size and nonadditivity is discussed in connection with a possible spatially anisotropic separation. (C) 2003 Elsevier Science (USA). All rights reserved MH - France MH - Mexico|Distrito Federal MH - Ukraine PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000181400400002 L2 - film stability;inter-facial tension;adsorption;binary mixture;Monte-Carlo simulation;INTEGRAL-EQUATION THEORIES; FLUID PHASE-SEPARATION; MONTE-CARLO SIMULATION; LENNARD-JONES FLUID; GIBBS ENSEMBLE; CANONICAL ENSEMBLE; POROUS-MEDIA; SLIT PORES; EQUILIBRIA; ADSORPTION SO - Journal of Colloid and Interface Science 2003 ;258(1):10-19 7888 UI - 9217 AU - Dukelsky J AU - Dussel GG AU - Hirsch JG AU - Schuck P AD - CSIC, Inst Estructura Mat, Madrid 28006, SpainUniv Buenos Aires, Dept Fis Juan Jose Giambiagi, RA-1428 Buenos Aires, DF, ArgentinaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Paris 11, Inst Nucl Phys, F-91406 Orsay, FranceDukelsky, J, CSIC, Inst Estructura Mat, Serrano 123, Madrid 28006, Spain TI - Comparison between exact and approximate treatments of the pairing interaction for finite Fermi systems AB - As a model for a deformed nucleus the many level pairing model (picket fence model with 100 levels) is considered in four approximations and compared to the exact solution given by Richardson long time ago. It is found that, as usual, the number projected BCS method improves over standard BCS but that it is much less accurate than the more sophisticated many-body-approaches which are Coupled Cluster Theory (CCT) in its SUB2 version or Self-Consistent Random Phase Approximation (SCRPA). (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - France MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000180953600004 L2 - ULTRASMALL SUPERCONDUCTING GRAINS; MODELS; RPA SO - Nuclear Physics A 2003 ;714(1-2):63-74 7889 UI - 7325 AU - Duman OB AU - Miska S AU - Kuru E AD - New Mexico Inst Min & Technol, Mexico City, DF, MexicoUniv Tulsa, Dept Petr Engn, Tulsa, OK 74104, USAUniv Alberta, Edmonton, AB T6G 2M7, CanadaDuman, OB, Turkish Petr Corp, Ankara, Turkey TI - Effect of tool joints on contact force and axial-force transfer in horizontal wellbores AB - An experimental study has been conducted to investigate the effect of tool joints on the buckling/post-buckling behavior of drillpipes constrained in straight horizontal wellbores. Buckling/post-buckling behavior of drillpipes has traditionally been investigated with continuous pipes. To our knowledge, this is the first time the effect of tool joints is included in such a study. The U. of Tulsa Drilling Research Projects experimental buckling facility has been used to carry out the desired experiments. Axial loads at both ends of the pipe and contact forces at the tool joints were measured. Changes in the drillpipe configuration were also investigated visually as the axial load increases. Some of the new findings of this study can be summarized as follows. Sequential occurrence of buckling/post-buckling configuration of jointed pipe is similar to that of continuous pipes, reported previously by various investigators. In other words, in both cases, the pipes buckle first laterally and then helically as the axial compressive load increased. The presence of tool joints does not affect the critical lateral (sinusoidal) buckling load significantly. However, it increases the critical load, causing helical pipe configuration (helical buckling) of approximately 20%. The use of tool joints improved the efficiency of the axial load transfer by approximately 40%. The results of this study will help to improve the design of operational parameters for drilling with jointed pipes as well as with coiled tubing (CT). In particular, improved axial-load transfer performance would allow drillers to use a higher weight on bit and, consequently, faster and possibly less costly drilling MH - Canada MH - Mexico|Distrito Federal MH - Turkey MH - USA PB - RICHARDSON: SOC PETROLEUM ENG RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Petroleum U5 - J;Article AV - English IS - 1064-6671 UR - ISI:000185620600007 SO - Spe Drilling & Completion 2003 ;18(3):267-274 7890 UI - 9014 AU - Duncan NJ AU - de O AU - Alok D AU - Zohar Y AD - CIAD, Unidad Mazatlan, Mazatlan 82000, Sinaloa, MexicoUniv Maryland, Ctr Marine Biotechnol, Inst Biotechnol, Baltimore, MD 21202, USADuncan, NJ, CIAD, Unidad Mazatlan, AP 711, Mazatlan 82000, Sinaloa, Mexico TI - Effects of controlled delivery and acute injections of LHRHa on bullseye puffer fish (Sphoeroides annulatus) spawning AB - Mature bullseye puffer (Sphoeroides annulatus) fish were caught and taken into captivity. Fish with a mean oocyte diameter greater than 0.45 mm were divided equally into three experimental groups (n = 11) that were treated with a saline injection (control), multiple injections of luteinizing hormone-releasing hormone analogue (LHRHa) (day 0-20 mug kg(-1), day 2-40 mug kg (-1), day 4-80 80 mug kg (-1), day 6-160 mug kg(-1)) and a single administration of slow-release ethylene vinyl acetate (EVAc) co-polymer implants containing the identical LHRHa (day 0-75 mug per fish < 800 g or 150 mug per fish >800 g). A total of 82% of the fish spawned in each of the two LHRHa groups (injection and implant) compared to just 18% in the control group. The majority of the fish treated with LHRHa, eight in the injection group and nine in the implant group, spawned during the first week after administration. There were no significant differences in mean egg size (group means 0.64-0.71 mm) and percentage fertilization (group means 90.2-97.3%) among the LHRHa-treated groups and when compared with the control fish that received saline injection and fish that ovulated naturally without any treatment. The successful spawning using LHRHa-based spawning protocols is an important step in the development of the culture of the bullseye puffer. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Sinaloa MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000181376100050 L2 - LHRHa;implant;spawning;maturation;puffer;fish;OOCYTE MATURATION; SALMO-TRUTTA; EGG QUALITY; INDUCTION; SYNCHRONIZATION; OVULATION; L. SO - Aquaculture 2003 ;218(1-4):625-635 7891 UI - 8778 AU - Dunlop JS AU - Mclure RJ AU - Kukula MJ AU - Baum SA AU - O'Dea CP AU - Hughes DH AD - Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Oxford, Dept Phys, Nucl & Astrophys Lab, Oxford OX1 3RH, EnglandSpace Telescope Sci Inst, Baltimore, MD 21218, USAINAOE, Puebla 72000, MexicoDunlop, JS, Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - Quasars, their host galaxies and their central black holes AB - We present the final results from our deep Hubble Space Telescope (HST) imaging study of the host galaxies of radio-quiet quasars (RQQs), radio-loud quasars (RLQs) and radio galaxies (RGs). We describe and analyse new Wide Field & Planetary Camera 2 (WFPC2) R-band observations for 14 objects, which when combined with the first tranche of HST imaging reported in McLure et al., provide a complete and consistent set of deep, red, line-free images for statistically matched samples of 13 RQQs, 10 RLQs and 10 RGs in the redshift band 0.15x10(8) M-circle dot, while the radio-loud objects are confined to M-bh>10(9) M-circle dot. This apparent mass-threshold difference, which provides a natural explanation for why RQQs outnumber RLQs by a factor of 10, appears to reflect the existence of a minimum and a maximum level of black hole radio output, which is a strong function of black hole mass (proportional toM(bh)(2-2.5)). Finally, we use our results to estimate the fraction of massive spheroids/black holes that produce quasar-level activity. This fraction is similar or equal to0.1 per cent at the present day, rising to >10 per cent at zsimilar or equal to2-3 MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 171 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000182118200009 L2 - black hole physics;galaxies : active;galaxies : photometry;quasars : general;infrared : galaxies;RADIO-QUIET QUASARS; HUBBLE-SPACE-TELESCOPE; ACTIVE GALACTIC NUCLEI; OPTICALLY SELECTED QUASARS; BAND ENERGY-DISTRIBUTION; NEARBY LUMINOUS QUASARS; ROSAT DETECTED QUASARS; REDSHIFT SURVEY; NICMOS OBSERVATIONS; ELLIPTIC GALAXIES SO - Monthly Notices of the Royal Astronomical Society 2003 ;340(4):1095-1135 7892 UI - 8310 AU - Dunne BC AU - Chu YH AU - Chen CHR AU - Lowry JD AU - Townsley L AU - Gruendl RA AU - Guerrero MA AU - Rosado M AD - Univ Illinois, Dept Astron, Urbana, IL 61801, USAPenn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoDunne, BC, Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA TI - Diffuse X-ray emission from the quiescent superbubble M17, the omega nebula AB - The emission nebula M17 contains a young similar to1 Myr old open cluster; the winds from the OB stars of this cluster have blown a superbubble around the cluster. ROSAT observations of M17 detected diffuse X-ray emission peaking at the cluster and filling the superbubble interior. The young age of the cluster suggests that no supernovae have yet occurred in M17; therefore, it provides a rare opportunity to study hot gas energized solely by shocked stellar winds in a quiescent superbubble. We have analyzed the diffuse X-ray emission from M17 and compared the observed X-ray luminosity of similar to2.5 x 10(33) ergs s(-1) and the hot gas temperature of similar to8.5 x 10(6) K and mass of similar to1 M-. to model predictions. We find that bubble models with heat conduction overpredict the X-ray luminosity by 2 orders of magnitude; the strong magnetic fields in M17, as measured from H I Zeeman observations, have most likely inhibited heat conduction and associated mass evaporation. Bubble models without heat conduction can explain the X-ray properties of M17, but only if cold nebular gas can be dynamically mixed into the hot bubble interior and the stellar winds are clumpy with mass-loss rates reduced by a factor of greater than or equal to3. Future models of the M17 superbubble must take into account the large-scale density gradient, small-scale clumpiness, and strong magnetic field in the ambient interstellar medium MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183278700029 L2 - HII regions;ISM : bubbles;ISM : individual (M17);stars : early-type;stars : winds, outflows;LARGE-MAGELLANIC-CLOUD; BLOWN INTERSTELLAR BUBBLES; MASS-LOSS; H-I; STARS; EVOLUTION; SAMPLE; WINDS SO - Astrophysical Journal 2003 ;590(1):306-313 7893 UI - 8316 AU - Durazo-Beltran E AU - D'Abramo LR AU - Toro-Vazquez JF AU - Vasquez-Pelaez C AU - Viana MT AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22860, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoMississippi State Univ, Dept Wildlife & Fisheries, Starkville, MS 39762, USAUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoViana, MT, Univ Autonoma Baja California, Inst Invest Oceanol, POB 453, Ensenada 22860, Baja California, Mexico TI - Effect of triacylglycerols in formulated diets on growth and fatty acid composition in tissue of green abalone (Haliotis fulgens) AB - Isocalotic formulated diets containing four different sources of triacylglycerols (olive, corn, linseed and cod liver oils) at three levels (1.5%, 3.0% and 5.0%, total added dietary lipid = 5.0%) and a crude protein content of 37.5% to 39.9% were fed to juvenile green abalone (Haliotis fulgens). Growth and fatty acid composition of the muscle tissue were compared to that of abalone fed a reference diet that contained no added lipids (0.25% total lipids). After 75 days of culture in a flow-through system, no significant differences in growth were found among abalone fed the different oil types. Responses to different dietary levels of lipid were significantly different but not to sources of oils. Maximum growth was achieved at a 1.5% inclusion of oil sources. It appears that abalone have a great capacity to synthesize lipid from carbohydrate sources. Results also suggest that abalone are capable of desaturation and elongation of 18 C polyunsaturated fatty acids (PUFAs) of the n - 3 and n - 6 family to 20:5n - 3 and 20:4n - 6. Synthesis of 22:6n - 3 from 20:5n - 3 is not reflected in the results. The lack of a growth response to the different levels of highly unsaturated fatty acids (HUFA) provided by the different oils included in the experimental diets may be due to an insufficient duration of the experiment to achieve an essential fatty acid deficiency. The relationship between fatty acid profiles of tissue and the diets fed to the abalone suggests that metabolic activity of the gut microflora is not a source of essential fatty acids. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000183259300019 L2 - fatty acid requirement;abalone;nutrition;edible oil;growth;LIPID-COMPOSITION; DISCUS-HANNAI; TUBERCULATA L; FISH; NUTRITION; REQUIREMENTS; DIGESTION; SEAWEED; LARVAE; POLAR SO - Aquaculture 2003 ;224(1-4):257-270 7894 UI - 7527 AU - Durrant BS AU - Olson MA AU - Amodeo D AU - Anderson A AU - Russ KD AU - Campos-Morales R AU - Gual-Sill F AU - Garza JR AD - Zool Soc San Diego, Ctr Reprod Endangered Species, San Diego, CA, USAChapultepec Pk Zoo, Mexico City, DF, MexicoDurrant, BS, Zool Soc San Diego, Ctr Reprod Endangered Species, POB 120551, San Diego, CA USA TI - Vaginal cytology and vulvar swelling as indicators of impending estrus and ovulation in the giant panda (Ailuropoda melanoleuca) AB - The giant panda is critically endangered in its native habitat, which is continually depreciated by the pressure of human population growth, and the small captive population is not yet self-sustaining. Female giant pandas are seasonally monoestrous With spontaneous Ovulation. Precise monitoring of the estrous cycle to pinpoint the time Of Ovulation is critical for the Success of both timed mating and artificial insemination. Vaginal cytology is a Useful adjunct to endocrinological data in describing the estrous Cycle in many species, including domestic carnivores; however, it has not been used effectively in the giant panda. In this study, vaginal swabs were obtained from four nulliparous females ranging in age from 6 to 14 years. Cells were stained with Papanicolaou stain and classified as basophils, intermediate cells, or superficial cells based on traditional criteria. In addition, cell color changes from the basophilic through the acidophilic and keratinized stages were recorded. The size and color of the vulva of a single female was scored daily on a scale of 0-3, with anestrus characterized as 0. The day of Ovulation was retrospectively designated as day 0 based oil urinary estrogen concentrations, behavior, and morphological indicators. The vulva began to swell between days -11 and -9, with peak tumescence on the day Of Ovulation. The percentage of superficial cells began to increase by day -8 to -7, and peaked between days -2 and + 2. A chromic shift Occurred oil day -8, when the majority of vaginal cells changed from basophilic to acidophilic without any accompanying nuclear or cytoplasmic changes. A second chromic shift was observed oil day -2, when keratinized cells replaced acidophilic cells as the majority of vaginal cells. By day +4, all parameters had returned to baseline except vulvar swelling, which slowly subsided over the next several days. These data show the correlation of trichrome-stained vaginal cytology with other measured indicators of estrus in the giant panda, and its predictive value in determining the time of ovulation. (C) 2003 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences;Zoology U5 - J;Article AV - English IS - 0733-3188 UR - ISI:000185104700002 L2 - estrous cycle;superficial cells;Papanicolaou;vaginal smears;CYCLICAL CHANGES; ESTROUS-CYCLE; EVERSMANNI; PUBERTY; SMEAR SO - Zoo Biology 2003 ;22(4):313-321 7895 UI - 8451 AU - Dworkin JP AU - Lazcano A AU - Miller SL AD - NASA, Goddard Space Flight Ctr, Extraterr Phys Lab, Greenbelt, MD 20771, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USALazcano, A, NASA, Goddard Space Flight Ctr, Extraterr Phys Lab, Greenbelt, MD 20771 USA TI - The roads to and from the RNA world AB - The historical existence of the RNA world, in which early life used RNA for both genetic information and catalytic ability, is widely accepted. However, there has been little discussion of whether protein synthesis arose before DNA or what preceded the RNA world (i.e. the pre-RNA world). We outline arguments of what route life may have taken out of the RNA world: whether DNA or protein followed. Metabolic arguments favor the possibility that RNA genomes preceded the use of DNA as the informational macromolecule. However, the opposite can also be argued based on the enhanced stability, reactivity, and solubility of 2-deoxyribose as compared to ribose. The possibility that DNA may have come before RNA is discussed, although it is a less parsimonious explanation than DNA following RNA. (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 21 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000182892900010 L2 - pre-RNA world;RNA world;ribose;deoxyribose;prebiotic evolution;PREBIOTIC SYNTHESIS; NUCLEIC-ACIDS; RIBONUCLEOTIDE REDUCTASES; PURINE NUCLEOSIDES; STRUCTURAL BASIS; DNA ENZYMES; EVOLUTION; LIFE; ORIGIN; METABOLISM SO - Journal of Theoretical Biology 2003 ;222(1):127-134 7896 UI - 7467 AU - Eberhard WG AU - Cordero C AD - Univ Costa Rica, Smithsonian Trop Res Inst, Ciudad Univ, Costa RicaUniv Costa Rica, Escuela Biol, Ciudad Univ, Costa RicaUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoEberhard, WG, Univ Costa Rica, Smithsonian Trop Res Inst, Ciudad Univ, Costa Rica TI - Sexual conflict and female choice MH - Costa Rica MH - Mexico|Distrito Federal PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 28 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Letter AV - English IS - 0169-5347 UR - ISI:000185311800004 L2 - BENEFITS SO - Trends in Ecology & Evolution 2003 ;18(9):438-439 7897 UI - 8346 AU - Echeverria JC AU - Woolfson MS AU - Crowe JA AU - Hayes-Gill BR AU - Croaker GDH AU - Vyas H AD - Univ Nottingham, Sch Elect & Elect Engn, Nottingham NG7 2RD, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Elect Engn, Mexico City 09340, DF, MexicoCity Hosp Nottingham, Nottingham, EnglandQueens Med Ctr, Nottingham NG7 2UH, EnglandEcheverria, JC, Univ Nottingham, Sch Elect & Elect Engn, Nottingham NG7 2RD, England TI - Interpretation of heart rate variability via detrended fluctuation analysis and alpha beta filter AB - Detrended fluctuation analysis (DFA), suitable for the analysis of nonstationary time series, has confirmed the existence of persistent long-range correlations in healthy heart rate variability data. In this paper, we present the incorporation of the alphabeta filter to DFA to determine patterns in the power-law behavior that can be found in these correlations. Well-known simulated scenarios and real data involving normal and pathological circumstances were used to evaluate this process. The results presented here suggest the existence of evolving patterns, not always following a uniform power-law behavior, that cannot be described by scaling exponents estimated using a linear procedure over two predefined ranges. Instead, the power law is observed to have a continuous variation with segment length. We also show that the study of these patterns, avoiding initial assumptions about the nature of the data, may confer advantages to DFA by revealing more clearly abnormal physiological conditions detected in congestive heart failure patients related to the existence of dominant characteristic scales. (C) 2003 American Institute of Physics MH - United Kingdom MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000183156700005 L2 - LONG-RANGE CORRELATIONS; TIME-SERIES; CARDIOVASCULAR VARIABILITY; DNA-SEQUENCES; DYNAMICS; MORTALITY; BEHAVIOR SO - Chaos 2003 ;13(2):467-475 7898 UI - 8991 AU - Echeverria OM AU - Benavente R AU - Ortiz R AU - Vazquez-Nin GH AD - Natl Autonomous Univ Mexico, Fac Sci, Dept Cell Biol, Electron Microscopy Lab, Mexico City 04510, DF, MexicoUniv Wurzburg, Bioctr, Dept Cell & Dev Biol, Wurzburg, GermanyEcheverria, OM, Apartado Postal 70-438, Mexico City, DF, Mexico TI - Ultrastructural and immunocytochemical analysis of the XY body in rat and Guinea pig AB - The formation of the XY body involves the compaction of the extended chromatin to form a mesh of fibrogranular structures. During this process the ribonucleoprotein particles (RNP), which were associated with the chromatin filaments progressively disappear. High resolution immunolocalization indicates that the mature XY body does not contain RNA polymerase II, hnRNPs, or snURNPs. Occasionally chromatin fibrils extend outside of the XY body. These fibrils are frequently associated with nascent RNP fibrils and granules indicating that not all the DNA of the sex chromosomes is transcriptionally inactive. However, transcription is located outside the sex body. The recombination protein Dmc1 is present in nodules associated with the unpaired chromosomal axes of the sex chromosomes located in the XY body. Cytochemical staining methods and in situ hybridization at electron microscopic level show that RNA is present in the unpaired chromosomal axes suggesting that the presence of RNA in the chromosomal axes and in forming synaptonernal complexes is related with the process of final pairing. The sex body and the nucleoli associated with it do not interweave and do not exchange RNA or DNA-containing filaments. These observations indicate that the spatial relation between these structures is just a close proximity, which is, however, very frequent MH - Germany MH - Mexico|Distrito Federal PB - PAVIA: LUIGI PONZIO E FIGLIO RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology U5 - J;Article AV - English IS - 1121-760X UR - ISI:000181508100005 L2 - sex vesicle;RNA;transcription;synaptonemal complex;MOUSE SPERMATOCYTES; CHIRONOMUS-THUMMI; POLYTENE NUCLEUS; SEX-CHROMOSOMES; SALIVARY-GLANDS; MEIOSIS; LOCALIZATION; PROTEIN; RNA; COMPLEXES SO - European Journal of Histochemistry 2003 ;47(1):45-54 7899 UI - 6857 AU - edetti-Panici P AU - Bermudez A AU - Blake P AU - Cardenas J AU - Chang TC AU - Chiara S AU - Di Paola G AU - Floquet A AU - Guthrie D AU - Kigawa J AU - Kumar L AU - Leborgne F AU - Lodge N AU - Poole C AU - Sardi J AU - Souhami L AU - Sundfor K AU - Symonds P AU - Tattersall M AU - Greggi S AU - Guthrie D AU - Parker V AU - Parmar MKB AU - Sardi J AU - Stewart LA AU - Tierney JF AD - MRC, Clin Trials Unit, Meta Anal Grp, London NW1 2DA, EnglandLibera Univ Campus Biomed Roma, Rome, ItalyUniv Buenos Aires, Buenos Aires, DF, ArgentinaRoyal Marsden Hosp, London SW3 6JJ, EnglandCtr Estatal Cancerol, Colima, MexicoChang Gung Mem Hosp, Linkou, TaiwanIst Nazl Ric Canc, I-16132 Genoa, ItalyInst Bergonie, Bordeaux, FranceDerbyshire Royal Infirm, Derby DE1 2QY, EnglandTottori Univ, Sch Med, Yonago, Tottori 683, JapanAll India Inst Med Sci, New Delhi, IndiaHosp Pereira Rossell, Montevideo, UruguayCity Hosp Birmingham, Birmingham, W Midlands, EnglandHop Gen Montreal, Montreal, PQ, CanadaNorwegian Radium Hosp, Oslo, NorwayLeicester Royal Infirm, Leicester, Leics, EnglandUniv Sydney, Sydney, NSW 2006, AustraliaIst Nazl Tumori, Fdn G Pascale, Naples, ItalyCOU RAGE UK, Manchester, Lancs, EnglandTierney, JF, MRC, Clin Trials Unit, Meta Anal Grp, 222 Euston Rd, London NW1 2DA, England TI - Neoadjuvant chemotherapy for locally advanced cervical cancer: a systematic review and meta-analysis of individual patient data from 21 randomised trials AB - Despite the enrolment of more than 3000 women in randomised trials, the benefits and risks of neoadjuvant chemotherapy in the treatment of locally advanced cervical cancer remain uncertain. We carried out a systematic review and meta-analysis of individual patient data to assess the effect of neoadjuvant chemotherapy in two comparisons. In the first comparison, of neoadjuvant chemotherapy followed by radical radiotherapy compared with the same radiotherapy alone, we obtained data from 18 trials and 2074 patients. When all trials were considered together, a high level of statistical heterogeneity suggested that the results could not be combined indiscriminately. A substantial amount of heterogeneity was explained by separate analyses of groups of trials. Trials using chemotherapy cycle lengths of 14 days and shorter (Hazard Ratio (HR)) =0.83, 95% Confidence Interval (CI) = 0.69-1.00, P= 0.046) or cisplatin dose intensities greater than or equal to 25 mg/m(2) per week (HR = 0.91, 95% Cl = 0.78-1.05, P=0.20) tended to show an advantage for neoadjuvant chemotherapy on survival. In contrast, trials using cycle lengths longer than 14 days (HR = 1.25, 95% Cl = 1.07-1.46, P= 0.005) or cisplatin dose intensities lower than 25mg/m(2) per week (HR = 1.35, 95% Cl = 1.11-1. 14, P= 0.002) tended to show a detrimental effect of neoadjuvant chemotherapy on survival. In the second comparison, of neoadjuvant chemotherapy followed by surgery compared with radical radiotherapy alone, data from 5 trials and 872 patients were obtained. The combined results from all trials (HR = 0.65, 95% Cl = 0.53-0.80, P= 0.0004) indicated a highly significant reduction in the risk of death with neoadjuvant chemotherapy, but there were some differences between the trials in their design and results. Despite some unexplained heterogeneity, the timing and dose intensity of cisplatin-based neoadjuvant chemotherapy appears to have an important impact on whether or not it benefits women with locally advanced cervical cancer and warrants further exploration. (C) 2003 Elsevier Ltd. All rights reserved MH - Argentina MH - Australia MH - Canada MH - United Kingdom MH - France MH - India MH - Italy MH - Japan MH - Mexico|Colima MH - Norway MH - Taiwan MH - Uruguay PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 31 U4 - Oncology U5 - J;Article AV - English IS - 0959-8049 UR - ISI:000186855300015 L2 - systematic review;meta-analysis;individual patient data;cervical neoplasms;drug therapy;chemotherapy;adjuvant;neoadjuvant;TERM FOLLOW-UP; RADIATION-THERAPY; UTERINE CERVIX; SQUAMOUS CARCINOMA; PELVIC RADIATION; STAGE-IIB; RADIOTHERAPY; CISPLATIN; BLEOMYCIN; PROLONGATION SO - European Journal of Cancer 2003 ;39(17):2470-2486 7900 UI - 8132 AU - eguez-Hurtado R AU - Garrido-Garrido G AU - Prieto-Gonzalez S AU - Iznaga Y AU - Gonzalez L AU - Molina-Torres J AU - Curini M AU - Epifano F AU - Marcotullio MC AD - Univ Perugia, Sez Chim Organ, Dipartimento Chim & Tecnol Farmaco, I-06123 Perugia, ItalyCtr Quim Farmaceut, Havana, CubaIPN, CINVESTAV, Guanajuato, MexicoCurini, M, Univ Perugia, Sez Chim Organ, Dipartimento Chim & Tecnol Farmaco, Via Liceo, I-06123 Perugia, Italy TI - Antifungal activity of some Cuban Zanthoxylum species AB - Ethanolic extracts of the trunk bark of Zanthoxylum fagara, Z. elephantiasis and Z martinicense showed activity against different species of fungi. No antibacterial activity was detected. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Italy MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Editorial Material AV - English IS - 0367-326X UR - ISI:000183746100011 L2 - Zanthoxylum fagara;Zanthoxylum elephantiasis;Zanthoxylum martinicense;antibacterial activity;antifungal activity;CONSTITUENTS SO - Fitoterapia 2003 ;74(4):384-386 7901 UI - 8736 AU - Eilitta M AU - Sollenberger LE AU - Littell RC AU - Harrington LW AD - Univ Florida, Dept Agron, Gainesville, FL 32611, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoSollenberger, LE, Univ Florida, Dept Agron, POB 110300, Gainesville, FL 32611 USA TI - On-farm experiments with maize-mucuna systems in the Los Tuxtlas region of Veracruz, Mexico. I. Mucuna biomass and maize grain yield AB - Maize (Zea mays)-mucuna (Mucuna pruriens) systems have been promoted to the smallholder farmers of the Los Tuxtlas region of southeastern Veracruz, Mexico. To determine on-farm performance, an agronomic assessment was conducted in 1995-97 replicating farmer conditions in four fields. Treatments were first-and second-season maize with first-season mucuna (system Zm-Mp/Zm), first-season maize with first-and second-season mucuna (system Zm-Mp/Mp), second-season maize following first-season mucuna (system Mp/Zm), and first-and second-season maize, no mucuna control. Data on mucuna biomass amount and quality as well as maize yield, yield components, and nutrient status were collected. Highest mucuna biomass was obtained in system Mp/Zm (leaf-stem-mulch biomass in 1996/97, 7.34 t ha(-1), 147 kg ha(-1) N), followed by systems Zm-Mp/Mp (5.06 t ha(-1), 101 kg N ha(-1)) and Zm-Mp/Zm (2.75 t ha(-1), 50 kg N ha-1). Second-season maize yield was increased over that of the control by 45-58% (0.15-0.23 t ha(-1)) in system Zm-Mp/Zm and by 118% (0.60 t ha(-1)) in system Mp/Zm. Mucuna did not increase first-season maize yield. Climatic constraints make second-season maize production risky and yield increases due to mucuna are low in absolute terms, perhaps not offsetting labour costs (systems Zm-Mp/Zm and Mp/Zm) or loss of first-season maize (Mp/Zm) MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0014-4797 UR - ISI:000182187800002 SO - Experimental Agriculture 2003 ;39(1):5-17 7902 UI - 8737 AU - Eilitta M AU - Sollenberger LE AU - Littell RC AU - Harrington LW AD - Univ Florida, Dept Agron, Gainesville, FL 32611, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoSollenberger, LE, Univ Florida, Dept Agron, POB 110300, Gainesville, FL 32611 USA TI - On-farm experiments with maize-mucuna systems in the Los Tuxtlas region of Veracruz, southern Mexico. II. Mucuna variety evaluation and subsequent maize grain yield AB - Despite interest in mucuna (Mucuna pruriens) as a green manure/cover, crop, biomass production of its accessions has been poorly quantified, including in the Los Tuxtlas region of Veracruz, Mexico where smallholders have used maize (Zea mays)-mucuna systems increasingly since 1991. This on-farm research compared the biomass production of three mucuna varieties (white-, mottled-, and black seeded) in a rotational maize-mucuna system. Mucuna was sole-cropped during the first season (on eleven and five fields in 1996 and 1997 respectively), and its impact on the second-season maize yield was measured (on seven fields in 1996). White and mottled varieties produced equal biomass (7.92 and 6.74 t ha(-1) in 1996 and 1997 respectively), and more than the black variety (6.85 and 4.90 t ha(-1) in 1996 and 1997 respectively). Mucuna increased 1996/97 second-season maize grain yields by 50% (from 0.97 to 1.46 t ha(-1)). Plots previously cropped with white and mottled varieties produced greater maize yield (1.55 t ha(-1)) than did black-variety plots (1.29 t ha(-1)). The research confirmed the higher productivity of the white and mottled varieties and the potential of the rotational system. Allocating the more desirable first-season growth period to mucuna and the riskier second season to maize is problematic, but the system may have potential in the region as a short-term fallow that permits second-season maize production MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0014-4797 UR - ISI:000182187800003 L2 - LEGUMINOUS COVER CROPS; HISTORY; SOILS SO - Experimental Agriculture 2003 ;39(1):19-27 7903 UI - 6942 AU - Eisenberg P AU - Figueroa-Vadillo J AU - Zamora R AU - Charu V AU - Hajdenberg J AU - Cartmell A AU - Macciocchi A AU - Grunberg S AD - Helsinn Healthcare SA, CH-6915 Lugano, SwitzerlandCalif Canc Care, Greenbrae, CA, USAHosp Gen Mexico City, Mexico City, DF, MexicoHosp Reg 1o Octubre, Mexico City, DF, MexicoPacific Canc Med Ctr, Anaheim, CA, USAPasco Pinellas Canc Ctr, Tarpon Springs, FL, USAComprehens Blood & Canc Ctr, Bakersfield, CA, USAFletcher Allen Hlth Care, Burlington, VT, USAMacciocchi, A, Helsinn Healthcare SA, POB 357,Pambio Noranco, CH-6915 Lugano, Switzerland TI - Improved prevention of moderately emetogenic chemotherapy-induced nausea and vomiting with palonosetron, a pharmacologically novel 5-HT3 receptor antagonist - Results of a phase III, single-dose trial versus dolasetron AB - BACKGROUND. Palonosetron, a highly selective and potent 5-HT3 receptor antagonist with a strong binding affinity and a long plasma elimination half-life (approximately 40 hours), has shown efficacy in Phase 11 trials in preventing chemotherapy-induced nausea and vomiting (CINV) resulting from highly emetogenic chemotherapy. The current Phase III trial evaluated the efficacy and safety of palonosetron in preventing acute and delayed CINV after moderately emetogenic chemotherapy. METHODS. in the current study, 592 patients were randomized to receive a single, intravenous dose of palonosetron 0.25 mg, palonosetron 0.75 mg, or dolasetron 100 mg, 30 minutes before receiving moderately emetogenic chemotherapy. The primary efficacy endpoint was the proportion of patients with a complete response (CR; defined as no emetic episodes and no rescue medication) during the first 24 hours after chemotherapy. Secondary endpoints included assessment of prevention of delayed emesis (2-5 days postchemotherapy). RESULTS. in the current study, 569 patients received study medication and were included in the intent-to-treat efficacy analyses. CR rates during the first 24 hours were 63.0% for palonosetron 0.25 mg, 57.1% for palonosetron 0.75 mg, and 52.9% for dolasetron 100 mg. CR rates during the delayed period (24-120 hours after chemotherapy) were superior for palonosetron compared with dolasetron. Adverse events (AEs) were mostly mild to moderate and not related to study medication, with similar incidences among groups. There were no serious drug-related AEs. CONCLUSIONS. A single dose of palonosetron is as effective as a single dose of dolasetron in preventing acute CINV and superior to dolasetron in preventing delayed CINV after moderately emetogenic chemotherapy, with a comparable safety profile for all treatment groups. (C) 2003 American Cancer Society MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 52 U4 - Oncology U5 - J;Article AV - English IS - 0008-543X UR - ISI:000186677000021 L2 - palonosetron;5-HT3 receptor antagonist;antiemetic;chemotherapy-induced nausea and vomiting;dolasetron;SELECTIVE ANTAGONIST; GUIDELINES; POTENT SO - Cancer 2003 ;98(11):2473-2482 7904 UI - 8050 AU - Eitam A AU - Holler T AU - Sivinski J AU - Aluja M AD - Univ Florida, Dept Entomol & Nematol, Gainesville, FL 32611, USAUSDA, APHIS, Florida Div Plant Ind, Gainesville, FL 32614, USAUSDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USAInst Ecol AC, Xalapa 91000, Veracruz, MexicoEitam, A, Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel TI - Use of host fruit chemical cues for laboratory rearing of Doryctobracon areolatus (Hymenoptera : Braconidae), a parasitoid of Anastrepha spp. (Diptera : Tephritidae) AB - Doryetobracon areolatus (Szepligeti) (Hymenoptera: Braconidae) is a common parasitoid of Anastrepha spp. (Diptera: Tephritidae). An efficient method of laboratory rearing incorporates chemicals from pear fruits into oviposition units. Production for the F-1 and F-2 generations was 12.1 and 9.3 progeny per female, respectively. Mean daily progeny production by F-2 females was between 1-2 progeny per female for almost all ages from 9 to 22 days. A bioassay was designed to determine the source of chemical cues used for host location. Parasitoids were given a choice between two oviposition units: a positive control containing all possible cues, and a treatment unit with cues derived from either the host fly, host fruit, both, or none. The number of females active on each oviposition unit was recorded. This experiment demonstrated that chemical cues derived from the host fruit, probably the peel, are involved in host location MH - Israel MH - Mexico|Veracruz MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000183972900017 L2 - biological control;fruit fly;host location;oviposition;RHAGOLETIS-POMONELLA; BRAZIL; LOCATION; STIMULI; MEXICO SO - Florida Entomologist 2003 ;86(2):211-216 7905 UI - 7471 AU - Ek-Ramos MJ AU - Racagni-Di Palma G AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, MexicoUniv Nacl Rio Cuarto, Dept Biol Mol, RA-5800 Rio Cuarto, Cordoba, ArgentinaHernandez-Sotomayor, SMT, Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Calle 43 130, Merida 97200, Yucatan, Mexico TI - Changes in phosphatidylinositol and phosphatidylinositol monophosphate kinase activities during the induction of somatic embryogenesis in Coffea arabica AB - Evidence was obtained for the presence of phosphatidylinositol (PIK) and phosphatidylinositol monophosphate kinase (PIPK) at different developmental stages during somatic embryogenesis in Coffea arabica L. by in vitro phosphorylation of endogenous lipids in the presence of [gamma-P-32] ATP followed by thin-layer chromatography. The results indicate the existence of a relationship between the development stages that were analysed and the kinases found. In cells without differentiated structures (EC, embryogenic calli) phosphatidylinositol kinase and phosphatidylinositol monophosphate 5-kinase (EC 2.7.1.68) activities were present. These activities increased significantly in the first differentiated stage (PREG, preglobular structures) and decreased as the development stages advanced. Phosphatidylinositol monophosphate ( PIP) formation decreased from the globular (GLO) to the cotyledonary (COT) stage. The PIP fraction contained both isomers, PI 3-P and PI 4-P. This demonstrates PI3K (EC 2.7.1.137) and PI4K (EC 2.7.1.67) activity during somatic embryogenesis in Coffea arabica L. When wortmannin, an inhibitor of PI3K and PI4K activities, was included in an in vitro assay, a dose-dependent inhibition of the formation of both isomers was observed. The addition of wortmannin to the induction medium during the PREG stage reduced the number of normal embryos. Our results suggest that PI and PIP kinases and the formation of certain phosphoinositides may play roles in the regulation of somatic embryo development in Coffea arabica L MH - Argentina MH - Mexico|Yucatan PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-9317 UR - ISI:000185225200012 L2 - PLANT-CELLS; TISSUE-CULTURE; TOBACCO CELLS; PROTEIN; 3-KINASE; EMBRYOS; PHOSPHOINOSITIDES; GROWTH; ACID; PHOSPHORYLATION SO - Physiologia Plantarum 2003 ;119(2):270-277 7906 UI - 9107 AU - El-Hadad S AU - Samuel AM AU - Samuel FH AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, GM Powertrain Grp, Milford, NH 03055, USACorp Nemak SA de CV, Res & Dev, Garza Garcia 66221, NL, MexicoSamuel, FH, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Effects of Bi and Ca addition on the characteristics of eutectic Si particles in Sr-modified 319 alloys AB - Al-Si-Cu (319-type) alloys containing 0.04 and 0.4 wt% Mg were used in this study. The alloys were modified with similar to80 ppm strontium and various concentrations of bismuth (50-9000 ppm) and calcium (50-200 ppm) were added. The alloy melts were poured into a preheated graphite mould (600degreesC, cooling rate similar to0.8degreesC/s) that was also used to conduct thermal analysis experiments to monitor the effects of the Bi and Ca additions on the Al-Si eutectic reaction. Microstructures were examined using optical microscopy, image analysis, and electron probe microanalysis (EPMA), coupled with EDX/WDS facilities. The effects of Bi and Ca on the microstructural changes of the modified 319 alloys were studied in terms of: a) the changes in the Al-Si eutectic temperature with trace element additions, b) the Si particle characterisation (particle length, area, roundness, and density), and c) the identification of new phases occurring during solidification. The results showed that the modifying effect of Sr continuously diminished with the addition of Bi up to similar to3000 ppm, after which the modifying action of Bi commenced, with a further increase in its concentration. Bismuth was found to precipitate in the form of oxides containing a few ppm of Sr and an appreciable amount of Mg (similar to5%). It was found that Ca additions of 50 ppm and higher coarsened the Si particles, due to the formation of Al-Si-Ca-Sr compounds, the form (rod or plate) and chemical composition (i.e., Al-7(Ca,Sr)Si-7 or Al-2(Ca,Sr)Si-2) of which were strongly related to the Mg concentration in the alloy MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - SHEFFIELD: CASTINGS TECHNOLOGY INT RP - NOT IN FILE U3 - TC 2 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000181136900007 L2 - 319 type Al-Si-Cu alloys;Sr;Mg addition;Bi;Ca additions;modification;Si particle characteristics;thermal analysis SO - International Journal of Cast Metals Research 2003 ;15(5):551-564 7907 UI - 8789 AU - El-Sawaf AK AU - Hernandez-Ortega S AU - Valdes-Martinez J AU - Swearingen JK AU - West DX AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMenoufia Univ, Dept Chem, Shibin Al Kawm, EgyptIllinois State Univ, Dept Chem, Normal, IL 61761, USAUniv Washington, Dept Chem, Seattle, WA 98195, USAValdes-Martinez, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Cuidad Univ, Mexico City 04510, DF, Mexico TI - Structural studies of N(4)-substituted thiosemicarbazones prepared from 4-formylantipyrine and a thiourea derived from 4-aminoantipyrine AB - Reaction of 4-formylantipyrine with N(4)-dimethylthiosemicarbazide and 3-piperidylthiosemicarbazide produces the N(4)-dimethylthiosemicarbazone (1), and the 3-piperidylthiosemicarbazone (2), respectively. Compound 1 is triclinic, space group P-1 with a = 6.329(1) Angstrom, b = 11.699(1) Angstrom, c = 11.943(1) Angstrom, alpha = 65.83(1)degrees, = 80.83(1)degrees, gamma = 84.90(1)degrees, and V = 796.1(1) Angstrom(3) with Z = 2, for D-calc = 1.324 g/cm(3). Compound 2 is triclinic, space group P-1 with a = 6.784(1) Angstrom, b = 10.485(2) Angstrom, c = 13.462(3) Angstrom, alpha = 102.05(2)degrees, = 98.61(2)degrees, gamma = 101.32(2)degrees, and V = 899.8(5) Angstrom(3) with Z = 2, for D-calc = 1.319 g/cm(3). Reaction of 4-aminoantipyrine with phenyl isothiocyanate produced N-antipyrine-N'-phenylthiourea (3). Compound 3 is monoclinic, space group P2(1)/n with a = 6.863(7) Angstrom, b = 15.361(3) Angstrom, c = 16.332(5) Angstrom, = 90.35(6)degrees, and V = 1720.7(18) Angstrom(3) with Z = 4, for D-calc = 1.306 g/cm(3). Compounds 1 and 2 have intermolecular hydrogen bonding between the carbonyl oxygen of the antipyrine moiety and the NH hydrogen of the thiosemicarbazone moiety. In 3 the two unique molecules are held together as a dimer by interactions of the two thiourea NH's and the antipyrine moiety's oxygen MH - Egypt MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Crystallography;Spectroscopy U5 - J;Article AV - English IS - 1074-1542 UR - ISI:000182061200005 L2 - antipyrine;thiosemicarbazone;thiourea;hydrogen bonding;planarity;ZINC(II) COMPLEXES; PALLADIUM(II) COMPLEXES; COPPER(II) COMPLEXES; NICKEL(II) COMPLEXES; METAL-COMPLEXES; IRON(III); N(4)-ANTIPYRINYLTHIOSEMICARBAZONE; COBALT(II,III) SO - Journal of Chemical Crystallography 2003 ;33(2):105-112 7908 UI - 7959 AU - Elias-Zuniga A AU - Beatty MF AD - Univ Nebraska, Dept Engn Mech, Lexington, KY 40591, USAInst Tecnol & Estudios Super Monterrey, Dept Ingn Mecan, Monterrey 64849, NL, MexicoBeatty, MF, Univ Nebraska, Dept Engn Mech, POB 910215, Lexington, KY 40591 USA TI - Stress-softening effects in the transverse vibration of a non-Gaussian rubber string AB - The Mullins effect in the small amplitude transverse vibration of a rubber cord is investigated. The fundamental frequency is determined for a specific class of stress-softening materials. Analytical relations for the cord vibration frequency are illustrated graphically for three phenomenological models. These results demonstrate the role of the material parameters and exhibit response characteristic of those reported in experiments by others and subsequently described here in new experiments. Frequency versus stretch results for two kinds of nonGaussian molecular network models for rubber elasticity are compared with experimental data for four varieties of rubber cords, for each of which only three experimentally determined material constants are needed. It is shown that the theoretical predictions stand in excellent agreement with test data MH - USA MH - Mexico|Nuevo Leon PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Mechanics U5 - J;Article AV - English IS - 0025-6455 UR - ISI:000184030100003 L2 - Mullins effect;stress-softening;string vibrations;non-Gaussian networks;rubber elasticity;MODEL; DAMAGE SO - Meccanica 2003 ;38(4):419-433 7909 UI - 7036 AU - Eliaschewitz FG AU - Calvo C AU - Valbuena H AU - Ruiz M AU - Aschner P AU - Villena J AU - Ramirez LA AU - Jimenez J AU - Macedo M AD - Hosp Heliopolis, Sao Paulo, BrazilNuevo Hosp Civil, Guadalajara, Jalisco, MexicoHosp Coromoto, Marcaibo, VenezuelaHosp Clin Buenos Aires, Buenos Aires, DF, ArgentinaAsoc Colombiana Diabet, Bogota, ColombiaHosp Nacl Cayetano Heredia, Lima, PeruUnidad Diagn Cardiol, Guatemala City, GuatemalaHosp Clin, Asuncion, ParaguayHOE 901 4013 Study Grp, Sao Paulo, Brazil TI - Latin American clinical trial project on insulin glargine versus NPH insulin plus glimepiride in Type 2 diabetes MH - Argentina MH - Brazil MH - Colombia MH - Guatemala MH - Mexico|Jalisco MH - Paraguay MH - Peru MH - Venezuela PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000185242100786 SO - Diabetologia 2003 ;46():A272-A272 7910 UI - 7828 AU - Elizalde-Solis O AU - Galicia-Luna LA AU - Sandler SI AU - Sampayo-Hernandez JG AD - Inst Politecn Nacl, Lab Termodinam Grad, ESIQIE, UPALM, Mexico City 07738, DF, MexicoUniv Delaware, Dept Chem Engn, Ctr Mol & Engn Thermodynam, Newark, DE 19716, USAGalicia-Luna, LA, Inst Politecn Nacl, Lab Termodinam Grad, ESIQIE, UPALM, Edif Z,Secc 6,1ER Piso, Mexico City 07738, DF, Mexico TI - Vapor-liquid equilibria and critical points of the CO2+1-hexanol and CO2+1-heptanol systems AB - Vapor-liquid equilibria (VLE), vapor-liquid-liquid equilibria (VLLE) and critical point (CP) data for the carbon dioxide + 1-hexanol (at 324.56, 353.93, 397.78, 403.39, 431.82 and 432.45 K up to 20 MPa) and carbon dioxide + 1-heptanol (at 313.14, 333.16, 373.32, 411.99 and 431.54 K up to 21 MPa) systems are reported. Phase behavior measurements were made in a new equilibrium cell based on the static-analytic method and capable of measurements up to 60 MPa and 673 K. The Peng-Robinson equation of state (EoS) with the Wong-Sandler mixing rules and temperature independent parameters was able to correlate and extrapolate the VLE for the carbon dioxide+1-hexanol system. However, in order to obtain good agreement with experimental data for the carbon dioxide + 1-heptanol system, the mixture EoS parameters were adjusted to the experimental VLE data at each temperature. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000184404300006 L2 - VLE apparatus;EoS;mixing rules;VLE;432 K; MIXTURES; TEMPERATURES; VANDERWAALS; DENSITIES; PRESSURE; STATE SO - Fluid Phase Equilibria 2003 ;210(2):215-227 7911 UI - 7950 AU - Elizarraras-Rivas J AU - Fragoso-Herrera R AU - Cerdan-Sanchez LF AU - Ramos-Zepeda R AU - Barajas-Barajas LO AU - Troyo-Sanroman R AU - McLean D AU - McGrath JJ AD - IMSS, CMNO, Ctr Invest Biomed Occidente, Div Genet Humana, Guadalajara, Jalisco, MexicoUniv Guadalajara, CUCS, Programa Doctorado Genet Humana, Guadalajara 44430, Jalisco, MexicoIMSS, Ctr Comunitario Salud Mental 1, Zapopan, Jalisco, MexicoIMSS, Ctr Invest Biomed Occidente, Div Inmunol, Guadalajara, Jalisco, MexicoUniv Guadalajara, CUCS, Dept Fisiol, Guadalajara 44430, Jalisco, MexicoMcGrath, JJ, Univ Queensland, Queensland Ctr Schizophrenia Res, Dept Psychiat, Wacol, Qld 4076, Australia TI - Minor physical anomalies and anthropometric measures in schizophrenia: a pilot study from Mexico MH - Australia MH - Mexico|Jalisco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Psychiatry U5 - J;Letter AV - English IS - 0920-9964 UR - ISI:000184060500013 SO - Schizophrenia Research 2003 ;62(3):285-287 7912 UI - 7562 AU - Elyukhin VA AU - Nikishin SA AU - Temkin H AD - IPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City, DF, MexicoTexas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409, USAElyukhin, VA, IPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City, DF, Mexico TI - Energy of antisite defects in chalcopyrites AB - The approach for the estimation of the antisite defect energy in the chalcopyrite compounds is developed. The energy of antisite defect is expressed as a function of the chalcopyrite-zinc blende transformation temperature. The energies of antisite defects in the CuInSe2, CuInTe2, AgInSe2, ZnGeAs2, ZnSnP2, ZnSnAs2, CdGeAs2, and CdSnAs2 chalcopyrite compounds are estimated. Conditions needed for the molecular beam epitaxy of the ordered and disordered ZnSnP2 are considered MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Crystallography;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1528-7483 UR - ISI:000185192600023 L2 - ORDER-DISORDER TRANSITION SO - Crystal Growth & Design 2003 ;3(5):773-775 7913 UI - 8674 AU - Elyukhin VA AU - Garcia-Salgado G AU - Pena-Sierra R AU - Nikishin SA AD - IPN, Dept Ingn Elect SEES, CINVESTAV, Mexico City 07738, DF, MexicoTexas Tech Univ, Dept Elect Engn, Lubbock, TX 79409, USAElyukhin, VA, IPN, Dept Ingn Elect SEES, CINVESTAV, Mexico City 07738, DF, Mexico TI - Thermodynamic model of low-temperature molecular beam epitaxy of GaN with hydrazine AB - A thermodynamic model is developed to describe the low-temperature molecular beam epitaxy of GaN with hydrazine. We consider an epitaxial process which takes into account the physisorbed states of the Ga atoms and hydrazine molecules on the (0001) A and B planes of GaN. The incident and desorbed fluxes are considered as a one-dimensional ideal gas. The thermodynamic affinity is used in order to estimate the deviation from thermodynamic equilibrium at the growth reactions. The thermodynamic characteristics of the growth reactions are estimated and they are in excellent agreement with experimental results. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000182296700036 L2 - SURFACE KINETICS; GALLIUM NITRIDE; GROWTH; PHASE; GAN(000(1)OVER-BAR); EVAPORATION; NUCLEATION; SUBSTRATE; LAYERS; INN SO - Journal of Applied Physics 2003 ;93(9):5185-5190 7914 UI - 7363 AU - Emkey RD AU - Reid I AU - Mulloy AL AU - Correa-Rotter R AU - Favus M AU - Bone H AU - Gupta J AU - La Motta A AU - Santora AC AD - Radiant Res, Wyomissing, PA, USAAuckland Hosp, Auckland, New ZealandMed Coll Georgia, Augusta, GA, USAInst Nacl Nutr Salvador Zurian, Tlalpan, MexicoUniv Chicago, Chicago, IL 60637, USAMichigan Bone & Mineral Clin, Detroit, MI, USAMerck Res Labs, Rahway, NJ, USA TI - Ten-year efficacy and safety of alendronate in the treatment of osteoporosis in postmenopausal women MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 8756-3282 UR - ISI:000183123300581 SO - Bone 2003 ;32(5):S206-S206 7915 UI - 6887 AU - Emmanouilidou A AU - Jung C AU - Reichl LE AD - Max Planck Inst Phys Complex Syst, D-01187 Dresden, GermanyUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Texas, Ctr Studies Stat Mech & Complex Syst, Austin, TX 78712, USAEmmanouilidou, A, Max Planck Inst Phys Complex Syst, Nothnitzer Str 38, D-01187 Dresden, Germany TI - Classical scattering for a driven inverted Gaussian potential in terms of the chaotic invariant set AB - We study the classical electron scattering from a driven inverted Gaussian potential, an open system, in terms of its chaotic invariant set. This chaotic invariant set is described by a ternary horseshoe construction on an appropriate Poincare surface of section. We find the development parameters that describe the hyperbolic component of the chaotic invariant set. In addition, we show that the hierarchical structure of the fractal set of singularities of the scattering functions is the same as the structure of the chaotic invariant set. Finally, we construct a symbolic encoding of the hierarchical structure of the set of singularities of the scattering functions and use concepts from the thermodynamical formalism to obtain one of the measures of chaos of the fractal set of singularities, the topological entropy MH - Germany MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000186571200049 L2 - STRANGE SETS; SYSTEMS; FIELDS SO - Physical Review e 2003 ;68(4): 7916 UI - 7328 AU - Endo M AU - Lee BJ AU - Kim YA AU - Kim YJ AU - Muramatsu H AU - Yanagisawa T AU - Hayashi T AU - Terrones M AU - Dresselhaus MS AD - Shinshu Univ, Dept Elect & Elect Engn, Nagano 3808553, JapanShinshu Univ, Gen Informat Proc Ctr, Nagano 3808553, JapanIPICyT, Adv Mat Dept, San Luis Potosi 78210, MexicoMIT, Cambridge, MA 02139, USAEndo, M, Shinshu Univ, Dept Elect & Elect Engn, 4-17-1 Wakasato, Nagano 3808553, Japan TI - Transitional behaviour in the transformation from active end planes to stable loops caused by annealing AB - Here we investigate the stabilization process on the active outer/inner surfaces (or the end plane of a graphene sheet) for shortened cup-stacked-type carbon nanotubes caused by annealing, utilizing both analytic and electrochemical techniques. The suggested schematic procedure for loop formation is as follows: (a) formation of single-type loops between neighbouring truncated conical graphene layers at 900-1200degreesC through a zipping mechanism after the evolution of hydrogen gas; (b) the transition from single- to multi-type loops above 1500degreesC accompanying a decrease in specific surface area MH - Japan MH - Mexico|San Luis Potosi MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1367-2630 UR - ISI:000185631900005 L2 - REINFORCED THERMOPLASTIC COMPOSITES; GRAPHITE NANOFIBERS; PORE STRUCTURE; CARBON; CONES; ELECTROLYTE; MORPHOLOGY; NICKEL; IRON SO - New Journal of Physics 2003 ;5(): 7917 UI - 7838 AU - Endo M AU - Kim YA AU - Hayashi T AU - Yanagisawa T AU - Muramatsu H AU - Ezaka M AU - Terrones H AU - Terrones M AU - Dresselhaus MS AD - Shinshu Univ, Fac Engn, Nagano 3808553, JapanIPICYT, Adv Mat Dept, San Luis Potosi 78210, MexicoMIT, Cambridge, MA 02139, USAEndo, M, Shinshu Univ, Fac Engn, 4-17-1 Wakasato, Nagano 3808553, Japan TI - Microstructural changes induced in "stacked cup" carbon nanofibers by heat treatment AB - Systematic studies of structural changes in stacked cup carbon nanofibers by heat treatment from 1800 to 3000 degreesC are carried out. The most prominent feature upon heat treatment of these nanofibers is the formation of energetically stable loops between adjacent active end planes both on the inner and outer surfaces. The appearance of the jagged outer and inner surfaces at 3000 degreesC is due to a combinational effect, perhaps caused by improved stacking within domains connected by loops having limited crystallite size, accompanied by structural reorganization between domains. Consequently, a low degree of graphitizability is ascribed to this unusual stacked cup morphology of pristine carbon nanofibers. (C) 2003 Elsevier Ltd. All rights reserved MH - Japan MH - Mexico|San Luis Potosi MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 36 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000184442400010 L2 - carbon fibers;graphitization;transmission electron microscopy (TEM);microstructure;VAPOR-PHASE; NANOTUBES; GRAPHITE; FIBERS; GROWTH; NICKEL; IRON; DECOMPOSITION; PYROLYSIS; CRYSTALS SO - Carbon 2003 ;41(10):1941-1947 7918 UI - 8179 AU - Endo M AU - Kim YA AU - Ezaka M AU - Osada K AU - Yanagisawa T AU - Hayashi T AU - Terrones M AU - Dresselhaus MS AD - Shinshu Univ, Fac Engn, Nagano 3808553, JapanShinshu Univ, Gen Informat Proc Ctr, Nagano 3808553, JapanIPICYT, Adv Mat Dept, San Luis Potosi 78210, MexicoMIT, Cambridge, MA 02139, USAEndo, M, Shinshu Univ, Fac Engn, 4-17-1 Wakasato, Nagano 3808553, Japan TI - Selective and efficient impregnation of metal nanoparticles on cup-stacked-type carbon nanofibers AB - We describe the efficient impregnation of Pt nanoparticles (OD < 3 nm) on cup-stacked-type carbon nanofibers. The method involves the dispersion of the fibers in H2PtCl6 followed by low-temperature annealing. The Pt particle deposition is always homogeneous and can be controlled selectively on the outer or internal core using the hydrophobic nature of the material. Since the Pt particle activity on the fibers is high, this material could find applications as efficient catalysts and allied biological devices MH - Japan MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 52 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000183521500007 L2 - NANOTUBES; SUPPORT SO - Nano Letters 2003 ;3(6):723-726 7919 UI - 8382 AU - Engelfried J AU - Cooper PS AU - Morelos A AU - Torres I AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoFermilab Natl Accelerator Lab, Batavia, IL 60510, USAEngelfried, J, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, Mexico TI - Two RICH detectors as velocity spectrometers in the CKM experiment AB - We present the design of two velocity spectrometers, to be used in the recently approved CKM experiment. CKM's main goal is the measurement of the branching ratio of K+ --> pi(+)v (v) over bar with a precision of 10%, via decays in flight of the K+, The design of both RICH detectors is based on the SELEX Phototube RICH. We will discuss the design and the expected performance based on studies with SELEX data and Monte Carlo simulations. Published by Elsevier Science B.V MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000182925900013 L2 - RICH detector;phototubes;rare kaon decay;CKM matrix;DECAY K+->PI(+)NU(NU)OVER-BAR SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;502(1):62-66 7920 UI - 8383 AU - Engelfried J AU - Filimonov IS AU - Kilmer J AU - Kozhevnikov AP AU - Kubarovsky VP AU - Molchanov VV AU - Nemitkin A AU - Ramberg E AU - Rud VI AU - Stutte L AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78240, MexicoInst High Energy Phys, Protvino, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaFermilab Natl Accelerator Lab, Batavia, IL 60510, USAEngelfried, J, Univ Autonoma San Luis Potosi, Inst Fis, Manuel Nava 6,Zona Univ, San Luis Potosi 78240, Mexico TI - SELEX RICH performance and physics results AB - SELEX took data in the 1996/1997 Fixed Target Run at Fermilab. The excellent performance parameters of the SELEX RICH Detector had direct influence on the quality of the obtained physics results. Published by Elsevier Science B.V MH - Mexico|San Luis Potosi MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000182925900050 L2 - RICH detector;phototubes;charmed baryons;600 GEV/C; DETECTOR; SIGMA(-); SCATTERING; PI(-) SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;502(1):285-288 7921 UI - 8200 AU - Enriquez-Diaz M AU - Caceres-Martinez C AU - Chavez-Villalba J AU - Le Pennec G AU - Le Pennec M AD - Univ Autonoma Baja California, Lab Expt Maricultura, La Paz 23081, Baja California, MexicoInst Univ Europeen Mer, UMR CNRS 6539, F-29280 Plouzane, FranceCtr Invest Biol Noroeste SC, Guaymas 85456, Sonora, MexicoCaceres-Martinez, C, Univ Autonoma Baja California, Lab Expt Maricultura, Apartado Postal 19-B, La Paz 23081, Baja California, Mexico TI - Gametogenesis of Atrina maura (Bivalve : Pinnidae) under artificial conditions AB - Gametogenesis in the Chinese pen-shell bivalve, Atrina maura (Sowerby, 1835) was provoked under artificial conditions in a running water system maintained under constant environmental conditions in semi-closed tanks. The specimens were fed with a diet commonly used in experimental hatcheries. Gametogenesis was described using stereological techniques (based on the oocyte diameters), classical and semi-thin histology procedures, and electron microscopy. Four reproductive stages were recognized based on oocyte size and cytological characteristics of the gonad: early gametogenesis (4-15 mum), growing (16-30 mum), mature (31-45 mum), and degenerating (46-65 mum). During gametogenesis, the auxiliary cells surrounded the oocyte basal region in the growing stage, afterward disappearing. A process of auto- and heterosynthesis characterize the mature stage, and nuclear deterioration and cytoplasmic membrane disintegration define the degenerating stage. The ultrastructural study of gonads showed that the cytological evolutionary process is comparable to those described for other bivalves. Additionally, the use of semi-thin histology permitted observation of oogonia mitosis. The conditioning system used in this experiment allowed the pen-shells to attain gonadal maturity in 35 days. The application of this procedure will permit hatcheries to obtain viable oocytes for larvae culture MH - France MH - Mexico|Baja California MH - Mexico|Sonora PB - REHOVOT: INT SCIENCE SERVICES/BALABAN PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Reproductive Biology;Zoology U5 - J;Article AV - English IS - 0168-8170 UR - ISI:000183532200008 L2 - reproduction;gametogenesis;pen-shell mollusk;oocyte size;Atrina maura;NOBILIS LINNAEUS 1758; PECTEN-MAXIMUS L; FATTY-ACIDS; PEN SHELL; PHOTOPERIOD; TEMPERATURE; OOGENESIS; OYSTER; REPRODUCTION; CALIFORNIA SO - Invertebrate Reproduction & Development 2003 ;43(2):151-161 7922 UI - 9290 AU - Enriquez S AU - Sand-Jensen K AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Cancun 77500, MexicoUniv Copenhagen, Freshwater Biol Lab, DK-3400 Hillerod, DenmarkEnriquez, S, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Apdo Postal 1152, Cancun 77500, Mexico TI - Variation in light absorption properties of Mentha aquatica L. as a function of leaf form: Implications for plant growth AB - To understand the association between leaf form and leaf optical properties, we examined light absorption variations in the leaves of Mentha aquatica L., an amphibious freshwater macrophyte. Specific absorption of leaves of M. aquatica showed a 7.5-fold variation, decreasing as pigment per unit area increased. This relationship indicates that dispersive samples, such as leaves, although efficient light traps, can also be affected by the "package effect." Mentha aquatica leaves, by expanding their biomass (increased specific leaf area [SLA]), improve their light absorption efficiency per unit of both pigment and leaf biomass. Changes in leaf biomass expansion were mainly a result of changes in leaf density, and as a consequence, leaf density appears to be a better descriptor of light absorption efficiency in M. aquatica leaves than does leaf thickness. Light absorption efficiency per unit of leaf biomass was also enhanced by increasing pigment content. Our results indicate that M. aquatica produces two types of leaves: (1) thin, less dense, and highly pigmented leaves and (2) thick, denser, and low pigmented leaves. The first type shows higher light absorption efficiency per unit of leaf biomass, which may allow the plant to achieve a better carbon balance under light limitation. The second type shows lower light absorption efficiency per unit of leaf biomass. Although it is unclear whether this reduction affects plant performance, a reduction in net carbon income per unit of absorbed photon may result in a reduction in the specific plant growth rate (RGR). Understanding the association between leaf form and the ability of leaf biomass to absorb light provides a mechanistic explanation for the empirical relationship found repeatedly in the literature between RGR and SLA. Our results offer a quantitative basis to explain part of the association between biomass expansion, pigment investment, and plant growth MH - Denmark MH - Mexico|Quintana Roo PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 1058-5893 UR - ISI:000180635600012 L2 - light absorption;package effect;specific absorption;specific leaf area;leaf thickness;leaf acclimation;relative growth rate;BIFACIAL LEAF; PHOTOSYNTHETIC ORGANISMS; THEORETICAL-ANALYSIS; NATURAL-WATERS; ALGAL CELLS; LEAVES; OPTICS; PHYTOPLANKTON; MACROPHYTES; ATTENUATION SO - International Journal of Plant Sciences 2003 ;164(1):125-136 7923 UI - 7786 AU - Erdmann K AU - Saenz C AD - Math Inst, Oxford OX1 3LB, EnglandFac Ciencias, Mexico City, DF, MexicoErdmann, K, Math Inst, 24-29 St Giles, Oxford OX1 3LB, England TI - On standardly stratified algebras AB - Let A be a finite dimensional algebra over an algebraically closed field k. For any fixed partial ordering of an index set, Lambda say, labelling the simple A-modules L(i), there are standard modules, denoted by Delta(i), i E A. By definition, Delta(i) is the largest quotient of the projective cover of L(i) having composition factors L(j) with j less than or equal to i. Denote by F(Delta) the category of A-modules which have a filtration whose quotients are isomorphic to standard modules. The algebra A is said to be standardly stratified if all projective A-modules belong to F(Delta). In this paper we define a "stratifying system" and we show that this produces a module Y, whose endomorphism ring A is standardly stratified. In particular, we construct stratifying systems for special biserial self-injective algebras MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 8 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000184560900021 SO - Communications in Algebra 2003 ;31(7):3429-3446 7924 UI - 7752 AU - Erler J AU - Kurylov A AU - Ramsey-Musolf MJ AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoUniv Washington, Inst Nucl Theory, Seattle, WA 98195, USACALTECH, Kellogg Radiat Lab, Pasadena, CA 91125, USAUniv Connecticut, Dept Phys, Storrs, CT 06269, USAErler, J, Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico TI - Weak charge of the proton and new physics AB - We address the physics implications of a precise determination of the weak charge of the proton, Q(W)(p), from a parity violating elastic electron proton scattering experiment to be performed at the Jefferson Laboratory. We present the standard model (SM) expression for Q(W)(p) including one-loop radiative corrections, and discuss in detail the theoretical uncertainties and missing higher order QCD corrections. Owing to a fortuitous cancellation, the value of Q(W)(p) is suppressed in the SM, making it a unique place to look for physics beyond the SM. Examples include extra neutral gauge bosons, supersymmetry, and leptoquarks. We argue that a Q(W)(p) measurement will provide an important complement to both high energy collider experiments and other low energy electroweak measurements. The anticipated experimental precision requires the knowledge of the O(alpha(s)) corrections to the pure electroweak box contributions. We compute these contributions for Q(W)(p), as well as for the weak charges of heavy elements as determined from atomic parity violation MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000184583700061 L2 - ATOMIC PARITY NONCONSERVATION; STANDARD-MODEL; HEAVY-TOP; RADIATIVE-CORRECTIONS; NEUTRAL-CURRENT; NUCLEON-SCATTERING; RHO-PARAMETER; GAUGE BOSONS; SUM-RULES; CESIUM SO - Physical Review D 2003 ;68(1): 7925 UI - 8764 AU - Erler J AU - Luo MX AD - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoZhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R ChinaErler, J, Univ Penn, Dept Phys & Astron, 209 S 33rd St, Philadelphia, PA 19104 USA TI - Precision determination of heavy quark masses and the strong coupling constant AB - We present a new QCD sum rule with high sensitivity to the continuum regions of charm and bottom quark pair production. Combining this sum rule with existing ones yields very stable results for the (MS) over bar quark masses, (m) over cap (c)((m) over cap (c)) and (m) over cap (b)((m) over cap (b)). We introduce a phenomenological parametrization of the continuum interpolating smoothly between the pseudoscalar threshold and asymptotic quark regions. Comparison of our approach with recent BES data allows for a robust theoretical error estimate. The parametric uncertainty due to alpha(s) is reduced by performing a simultaneous fit to the most precise sum rules and other high precision observables. This includes a new evaluation of the lifetime of the tau lepton, tau(tau), serving as a strong constraint on alpha(s). Our results are (m) over cap (c)((m) over cap (c)) = 1.289(-0.045)(+0.040) GeV, (m) over cap (b)((m) over cap (b)) = 4.207(-0.031)(+0.030) GeV (with a correlation of 29%), and alpha(s)(M-Z)[tau(tau)] = 0.1221(-0.0023)(+0.0026). (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000182008800001 L2 - QCD SUM-RULES; ELECTROWEAK RADIATIVE-CORRECTIONS; RENORMALIZATION-GROUP ANALYSIS; TO-LEADING ORDER; TAU-LEPTON DECAY; CURRENT CORRELATORS; CHARM-QUARK; O(ALPHA(2)(S)); POLARIZATION; ALPHA(S) SO - Physics Letters B 2003 ;558(3-4):125-131 7926 UI - 8481 AU - Escamilla M AU - Kurtycz A AU - van der Heim R AD - Oficina Comunicac Lago, Guadalajara 45050, Jalisco, MexicoMaison Sci Homme, F-93210 St Denis, FranceFrench Inst Forestry Agr & Environm Engn, ENGREF, Res Grp Spatial & Environm Management, RGTE, F-75732 Paris, FranceEscamilla, M, Oficina Comunicac Lago, A Postal 5-687, Guadalajara 45050, Jalisco, Mexico TI - Water participation for poverty alleviation - the case of Meseta Purepecha, Mexico AB - The construction of small water reservoirs has been used in an effort to alleviate poverty in the Meseta Purepecha region in Mexico. The programme's rationale can be characterised as incentive-based participation, using both local employment and shared risks concepts. The programme so far has been a relative success. However, in the light of poverty alleviation questions have to be raised about the isolated nature of the programme as well as the role of the incentives used MH - France MH - Mexico|Jalisco PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000182774400025 L2 - local development;Meseta Purepecha;Mexico;poverty alleviation;shared risks SO - Water Science and Technology 2003 ;47(6):145-148 7927 UI - 7696 AU - Escamilla R AU - Duran A AU - Rosales MI AU - Moran E AU - ario-Franco MA AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Complutense, Fac Ciencias Quim, Dept Quim Inorgan, E-28040 Madrid, SpainUniv Complutense, Fac Ciencias Quim, Lab Complutense Altas Presiones, E-28040 Madrid, SpainEscamilla, R, Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico TI - The effect of Mn substitution on the structure and magnetic properties of Se(Cu1-xMnx)O-3 solid solution AB - The effects of Mn substitution on the structure and magnetic properties of the SeMO3 (M = Cu1-xMnx) solid solution have been studied. Rietveld refinements of the x-ray diffraction patterns of these samples indicate that the manganese ions occupy copper sites. This replacement induces significant changes in the M-O bond lengths that give rise to abrupt decreases of the [M-O-6] octahedral distortion. In contrast, the M-O(1)-M and M-O(2)-M bond angles remain essentially constant. The magnetic behaviour of this solid solution was studied in the temperature range of 2 K < T < 300 K. The temperature dependence of the inverse magnetic susceptibility is well described by the Curie-Weiss law at high temperatures, in the composition range studied. We found that the substitution of Mn for Cu induces a sharp drop in the saturation moment of SeCuO3. At about 10% of Mn there is a change from positive to negative Weiss constant theta(W) that is mainly due to the [M-O-6] octahedral distortion introduced by the substitution of the larger Mn ions in the structure. The M-H isotherms show a weak ferromagnetism at about 52 K in SeMnO3 MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000184718500017 L2 - CRYSTAL-STRUCTURE; MANGANESE OXIDE; DOUBLE EXCHANGE; SELENIUM IV; CHEMISTRY; MAGNETORESISTANCE; PEROVSKITE; SYSTEM; FILMS; DISTANCES SO - Journal of Physics-Condensed Matter 2003 ;15(12):1951-1961 7928 UI - 7846 AU - Escarela G AU - Carriere JF AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Unidad Iztapalapa, Mexico City 09340, DF, MexicoUniv Alberta, Dept Math & Stat Sci, Edmonton, AB, CanadaEscarela, G, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Unidad Iztapalapa, AT-223,Av San Rafael Atlixco No 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Fitting competing risks with an assumed copula AB - We propose a fully parametric model for the analysis of competing risks data where the types of failure may not be independent. We show how the dependence between the cause-specific survival times can be modelled with a copula function. Features include: identifiability of the problem; accessible understanding of the dependence structures; and flexibility in choosing marginal survival functions. The model is constructed in such a way that it allows us to adjust for concomitant variables and for a dependence parameter to assess the effects of these on each marginal survival model and on the relationship between the causes of death. The methods are applied to a prostate cancer data set. We find that, with the copula model, more accurate inferences are obtained than with the use of a simpler model such as the independent competing risks approach MH - Canada MH - Mexico|Distrito Federal PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 3 U4 - Health Care Sciences & Services;Mathematical & Computational Biology;Medical Informatics;Statistics & Probability U5 - J;Review AV - English IS - 0962-2802 UR - ISI:000184364200003 L2 - PROPORTIONAL HAZARDS MODEL; PROSTATE-CANCER; DISTRIBUTIONS; FAILURE; INFORMATION; REGRESSION; INFERENCE SO - Statistical Methods in Medical Research 2003 ;12(4):333-349 7929 UI - 6514 AU - Escobar G AU - Stankovic AA AU - Galvan E AU - Carrasco JM AU - Ortega R AD - IPICYT, Dept Appl Math & Comp Sci, San Luis Potosi 78216, SLP, MexicoNortheastern Univ, Dept Elect & Comp Engn, Boston, MA 02115, USAUniv Seville, Esc Sup Ingn, Seville, SpainEscobar, G, IPICYT, Dept Appl Math & Comp Sci, San Luis Potosi 78216, SLP, Mexico TI - A family of switching control strategies for the reduction of torque ripple in DTC AB - In this paper, we are interested in design of switching control strategies which, as in the case of classical direct torque control (DTC), aim to directly regulate two outputs: torque and flux amplitude. A criterion in terms of the error and/or the prediction in one-step-ahead on these outputs is proposed to design the switching sequence. As a result, a control vector, i.e., the switch position, is directly selected without the requirement of an auxiliary space vector or other modulation technique. We consider two criteria: quadratic and absolute value. Finally, experimental results implementing these two approaches are presented, and compared with the classical DTC MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000188048000013 L2 - induction motor;induction motor drives;inverters;motion control;switching circuits;torque control;velocity control SO - Ieee Transactions on Control Systems Technology 2003 ;11(6):933-939 7930 UI - 8468 AU - Escobar G AU - Stankovic AM AU - Carrasco JM AU - Galvan E AU - Ortega R AD - IPICyT, Dept Appl Math & Comp Syst, San Luis Potosi 78210, MexicoNortheastern Univ, Dept Elect & Comp Engn, Boston, MA 02115, USAUniv Sevilla, Escuela Super Ingn, Seville, SpainSupelec, CNRS, Signaux & Syst Lab, Rennes, FranceEscobar, G, IPICyT, Dept Appl Math & Comp Syst, San Luis Potosi 78210, Mexico TI - Analysis and design of direct power control (DPC) for a three phase synchronous rectifier via output regulation subspaces AB - In this paper, we present a controller that directly regulates the active and instantaneous reactive power in a synchronous three-phase boost-type rectifier. The controller ensures a good regulation of the output voltage, and guarantees the power factor close to one. The controller builds upon the ideas of the well known direct torque control (DTC) for induction motors. In our case, the active and reactive powers replace the torque and flux amplitude used as the controlled outputs in DTC, thus motivating the name DPC-control. We show that a simple modification to the original algorithm makes the selection of the control inputs more accurate. To formalize this technique we utilize the concept of output regulation subspaces. A modification is added to the basic controller to deal with disturbances such as unbalance and distortion in the source voltage. Finally, the proposed controller was tested both in simulations and experimentally, and illustrative results are presented here MH - France MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8993 UR - ISI:000182840700013 L2 - ac-dc power conversion;nonlinear systems SO - Ieee Transactions on Power Electronics 2003 ;18(3):823-830 7931 UI - 8629 AU - Escolar JD AU - Escolar MA AU - Guzman J AD - Univ Zaragoza, Fac Med, Dept Morphol Sci, E-50009 Zaragoza, SpainAutonomous Univ Ciudad, Anat Inst Biomed Sci, Juarez, MexicoEscolar, JD, Univ Zaragoza, Fac Med, Dept Morphol Sci, Domingo Miral S-N, E-50009 Zaragoza, Spain TI - Bronchial hysteresis: Morphometric study on the rat lung AB - The bronchus is an imperfect elastic structure because part of the energy transmitted in inspiration is not recovered in expiration. This phenomenon is known as bronchial hysteresis. The aim of this paper is to demonstrate bronchial hysteresis using morphometric techniques: differences in the wall and the bronchial lumen, between inspiration and expiration. Sixty disease-free Fischer rats were used, organized into 4 groups. The lungs from the first and second groups were fixed in inflation at 10 and 20 cm of H2O transpulmonary pressure (Ptp), respectively. Those taken from the third and fourth groups were fixed in deflation at 20 and 10 cm Ptp, respectively. The lungs were removed from the thorax, filled with air, and fixed via the pulmonary artery. A morphometric study of the following variables was performed: pulmonary volume (P-v), dead space (DS) internal bronchial area (A(i)), which is the area of the bronchial lumen, and total wall area (WA(t)), which is the area of the bronchial wall. The lungs fixed in deflation gave higher values for all the variables than those fixed in inflation. The Pv, DS, and Ai increased/decreased with the rise/fall of the Ptp; Ai was the only variable to display statistically significant values (P < .05) when the Ptp was modified. WAt showed statistically significant differences between the lungs fixed in inflation and deflation and underwent no modification when the Ptp was varied. This study supports the hypothesis that bronchial hysteresis can be demonstrated using morphometric techniques because differences were observed in the lumen and wall of the bronchus between inflation and deflation MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 2 U4 - Respiratory System U5 - J;Article AV - English IS - 0190-2148 UR - ISI:000182464600001 L2 - bronchus;hysteresis;lung;morphometry;rat;PRESSURE-VOLUME HYSTERESIS; CIGARETTE-SMOKE; SMALL AIRWAYS; SURFACE-AREA; RECRUITMENT; INFLATION; COLLAGEN SO - Experimental Lung Research 2003 ;29(4):195-209 7932 UI - 9448 AU - Escolar JD AU - Escolar MA AU - Guzman J AU - Roques M AD - Univ Zaragoza, Fac Med, Dept Morphol Sci, E-50009 Zaragoza, SpainAutonomous Univ Ciudad Juarez, Anat Inst Biomed Sci, Mexico City, DF, MexicoHosp La Fe, Dept Pediat, E-46009 Valencia, SpainEscolar, JD, Univ Zaragoza, Fac Med, Dept Morphol Sci, Domingo Miral S-N, E-50009 Zaragoza, Spain TI - Morphological hysteresis of the small airways AB - The resistance to airflow that develops in most obstructive processes takes place in the small airways. The aim of the present paper is to describe bronchial hysteresis morphometrically in a respiratory cycle model. As a working hypothesis, it is proposed that the changes that take place in the respiratory tract during the respiratory cycle are related to the bronchial size. Specimen rat lungs were organized into five groups: In the first group, the lungs were filled with a liquid fixative to 25 cm of H2O transpulmonary pressure. The following four groups were inflated with air and fixed through the pulmonary artery. Groups 2 and 3 were fixed at 10 and 20 cm transpulmonary pressure in inflation. The last two groups were fixed in deflation and, for this purpose, the transpulmonary pressure was increased to 27 cm and decreased to 20 and 10 cm, respectively. The lungs were processed for morphometrical study and the following variables were quantified: pulmonary volume, internal area, internal perimeter, wall area, internal area radius and bronchial wall radius. The diameter of the airways studied varied between 84.06 mum and 526.4 mum. The results were classified into three subgroups consisting of small, medium-sized and large bronchi. With a single exception - the internal area in the medium-sized bronchi inflated to 20 cm - all the results obtained in deflation were higher than those obtained in inflation. The internal area increased or decreased significantly upon raising or lowering the transpulmonary pressure respectively, in the small and medium-sized bronchi. The wall area in the large bronchi showed significant differences between inflation and deflation at 10 and 20 cm transpulmonary pressure. The wall area was modified significantly in the lungs fixed at 20 cm in the small bronchi and at 10 cm in medium-sized bronchi. The bronchial wall radius was significantly greater in the large bronchi and smaller in the small bronchi. The lumen of the medium-sized and small bronchi increases in inspiration and decreases in expiration. The wall thickness displayed differences between inflation and deflation. The most marked hysteresis was presented by the bronchial wall in the large bronchi. Our results suggest that the behavior of the bronchi varies according to their size MH - Mexico|Distrito Federal MH - Spain PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 6 U4 - Cell Biology;Pathology U5 - J;Article AV - English IS - 0213-3911 UR - ISI:000180340500003 L2 - bronchus;hysteresis;rat;morphometry;SMOOTH-MUSCLE; INDUCED BRONCHOCONSTRICTION; CIGARETTE-SMOKE; BRONCHIAL WALL; LUNG-VOLUME; MECHANICS; RAT; DIMENSIONS; DIAMETER; ASTHMA SO - Histology and Histopathology 2003 ;18(1):19-26 7933 UI - 7443 AU - Espino J AU - Alvarez L AU - Ornelas C AU - Rico JL AU - Fuentes S AU - Berhault G AU - Alonso G AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, MexicoUMSNH, Lab Catalisis, Inst Invest Met, Morelia 58000, Michoacan, MexicoUMSNH, Lab Catalisis, Fac Ingn Quim, Morelia 58000, Michoacan, MexicoUNAM, CCMC, Dept Catalisis, Ensenada 22830, Baja California, MexicoUniv Poitiers, CNRS, UMR 6503, Catalyse Chim Organ Lab, F-86022 Poitiers, FranceAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, Mexico TI - Comparative study of WS2 and CodNi/WS2 HDS catalysts prepared by ex situ/in situ activation of ammonium thiotungstate AB - A comparative study of the syntheses of unsupported WS2 and M/WS2 (M = Co, Ni) catalysts by ex situ/in situ decomposition of ammonium thiotungstate (ATT) is herein reported. Ex situ activation was performed under a H2S (15% volume)/H-2 flow, whereas in situ activation consists in the direct decomposition of ATT or Co(Ni)/ATT precursors in the presence of a hydrocarbon solvent during the hydrodesulfurization (HDS) of dibenzothiophene (DBT). Precursors were characterized by thermogravimetric analysis and final catalysts by X-ray diffraction (XRD), scanning electron microscopy (SEM) and specific surface area (BET). Catalysts activated using the in situ mode of activation present higher specific surface areas with the noticeable exception of the Ni/ATT precursor. Activity measurements showed that the in situ activated WS2 and Ni/WS2 catalysts exhibit higher activity than the ex situ activated catalysts MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua MH - Mexico|Michoacan PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000185494000010 L2 - ex situ/in situ activation;unsupported promotion;hydrodesulfurization;WS2;MOLYBDENUM SULFIDE CATALYSTS; TRANSITION-METAL SULFIDES; HYDROTREATING CATALYSTS; CO-MO; HYDRODESULFURIZATION CATALYSTS; NIW/AL2O3 CATALYSTS; MODEL CATALYSTS; NI-MO; TUNGSTEN; DECOMPOSITION SO - Catalysis Letters 2003 ;90(1-2):71-80 7934 UI - 7740 AU - Espinosa-Gonzalez C AU - Moggio I AU - rias-Marin E AU - Romero-Garcia J AU - Cruz-Silva R AU - Le Moigne J AU - Ortiz-Cisneros J AD - Ctr Invest Quim Aplicada, Coahuila 25100, MexicoUniv Autonoma Coahuila, Coahuila, MexicoInst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, FranceMoggio, I, Ctr Invest Quim Aplicada, Blvd Enrique Reyna 140, Coahuila 25100, Mexico TI - Layer-by-layer assembled films of a rigid poly(phenyl-ethynylene) and alternate poly(phenyl-ethynylene)/poly(aniline) AB - Anew main chain segmented rigid rod-like polymer, poly[2,5-dodecyloxy-1,4-bis(ethylene glycol benzoate)ethynylene], hereafter called pPEG2 has been synthesized by a palladium catalyzed polycondensation. The interactions within the pPEG2 molecules are strong enough to Give self-assembled multilayers (SAM), (pPEG2/pPEG2)(m) from diluted solutions. The films show emission in the green region at 512 nm. pPEG2 alternated with enzymatically synthesized poly(aniline) (PANi) as polycation provides supramolecular layered assemblies (pPEG2/PANi)(n), which will be of great interest for the future realization of light emitting diodes (LEDs) or biological detectors. The thickness of the films can be controlled by the number of absorbed layers as stated by UV-Vis spectroscopy. The morphology of (pPEG2/pPEG2)(m) assemblies, analyzed by AFM, consists of columnar domains coexisting with fine and homogenously distributed needles, while for the alternated (pPEG2/PANi)(n) assemblies. the SAM are rather of granular type. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Coahuila PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter;Polymer Science U5 - J;Article AV - English IS - 0379-6779 UR - ISI:000184592400021 L2 - poly(phenyl-ethynylene);self-assembly multilayers;poly(aniline);AFM;LANGMUIR-BLODGETT-FILMS; CONJUGATED POLYMERS; POLYANILINE; MULTILAYERS; MANIPULATION; DEPOSITION; DEVICES; DNA SO - Synthetic Metals 2003 ;139(1):155-161 7935 UI - 9435 AU - Espinosa B AU - Guevara J AU - Hernandez P AU - Slomianny MC AU - Guzman A AU - Martinez-Cairo S AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Immunol Lab, Mexico City 04510, DF, MexicoInst Nacl Enfermedades REsp, Dept Bioquim, Mexico City, DF, MexicoInst Nacl Neurol, Lab Enfermedades Neurodegenerat, Mexico City, DF, MexicoUniv Sci & Technol Lille, Chim Biol Lab, Villeneuve Dascq, FranceIMSS, Ctr Med Nacl S XXI, Unidad Invest, Mexico City, DF, MexicoZenteno, E, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Immunol Lab, POB 70159, Mexico City 04510, DF, Mexico TI - Characterization of an O-glycosylated plaque-associated protein from Alzheimer disease brain AB - In this work we characterized a 90-kDa glycoprotein from Alzheimer disease (90Azgp) brain extracts that is recognized by the GalNAc-specific lectin from Amaranthus leucocarpus (ALL), as determined through Western blot. The 90Azgp was purified by electro-elution. and its amino acid sequence determined from peptides obtained after trypsin digestion through MALDI-TOF (Matrix-assisted laser desorption ionization-time of flight), and compared with the relative values obtained from the NCBInr (Swiss-Prot 10/01/2001) database. The 90Azgp showed 32% and 42% homology with the KIAA0310 protein from human brain and the human gastric mucin, respectively. Presence of O-glycosidically linked glycans in the proteins recognized by ALL was confirmed by inhibition of the lectin-glycoprotein interaction through hapten-inhibition assays and also by elimination of the O-glycosidically linked glycans after treatment with O-glycanase from Diplococcus pneumoniae. Electron transmission microscopy confirmed that the receptor recognized by the lectin is processed in the Golgi apparatus of AD neurons. Although the specific role of this glycoprotein has not been identified, considering that the presence of this lectin receptor co-localized with neuritic plaques and in AD sprouting neurons, it could suggest that the O-glycosyl-protein identified by the A. leucocarpus lectin participates in the pathogenesis of neurodegenerative diseases MH - France MH - Mexico|Distrito Federal PB - LAWRENCE: AMER ASSN NEUROPATHOLOGISTS INC RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology;Neurosciences;Pathology U5 - J;Article AV - English IS - 0022-3069 UR - ISI:000180274800004 L2 - Alzheimer disease;Amaranthus leucocarpus lectin (ALL);O-glycosylated proteins;proteome analysis;T-specific lectin;Tn-specific lectin;AMARANTHUS-LEUCOCARPUS LECTIN; AMINO-ACID; PRECURSOR; NEURONS; IDENTIFICATION; RECOGNITION; BIOGENESIS; CLEAVAGE; SITE; GLYCOPEPTIDE SO - Journal of Neuropathology and Experimental Neurology 2003 ;62(1):34-41 7936 UI - 7383 AU - Espinosa G AU - Golzarri JI AU - Gammage RB AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoOak Ridge Natl Lab, Oak Ridge, TN 37831, USAEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Comparative measurements between NTD and GEL detectors for radon gas AB - Because of the interest in an inexpensive radon monitoring technique and the use of new materials and new methods, this work presents comparative measurements between traditional passive radon detector using nuclear track detector (NTD), and a new method based on the diffusion of radon gas in gels, measuring the quantity of the remainder radioactive solids by the analysis of the gamma radiation from the decay of radon daughters. The methodology of the new detectors is introduced. The preliminary results show a measurable response of the gel material detectors to radon gas. The measurements are compared with those using NTDs CR-39 type for calibration purposes. Both the detection systems, the passive close-end cup system with NTDs and the passive close-end cup gel material detector, were exposed at the same time in the radon calibration chamber to different radon exposition levels from 150 to 3000 Bq/m(-3). (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000185503400032 L2 - radon;nuclear tracks;gel detectors SO - Radiation Measurements 2003 ;36(1-6):179-181 7937 UI - 7384 AU - Espinosa G AU - Golzarri JI AU - Vazquez C AU - Fragoso R AU - Chadderton LT AU - Cruz SA AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAustralian Natl Univ, Inst Adv Studies, Atom & Mol Phys Labs, Canberra, ACT 2601, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - AFM observations of latent fission tracks on surfaces: amorphous SiO2 and quartz AB - Preliminary results of a systematic AFM experimental investigation of the surface 'track' effects produced by the passage of fission fragments from a californium (Cf-252) source into amorphous SiO2 and quartz are described. Fission fragments from the source were collimated using a 10 lint thick aluminum foil and comprised fragments with the usual binary distribution of energies-light and heavy-79.4 and 103.8 MeV. Irradiations and AFM measurements were carried out in air at normal room temperature and pressure. Remarkably high sputtering yields/fragment were discovered, and in the case of crystalline quartz the ejecta was found to be arranged in an ordered mariner. A brief discussion is given of a part likely to be played by electronic energy loss induced Coulomb explosion of target atoms for each point of fragment entry. (C) 2003 Elsevier Ltd. All rights reserved MH - Australia MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000185503400041 L2 - latent track;SiO2;atomic force microscope (AFM);CR-39 SO - Radiation Measurements 2003 ;36(1-6):225-228 7938 UI - 8905 AU - Espinosa G AU - Gammage RB AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoOak Ridge Natl Lab, Oak Ridge, TN 37831, USAEspinosa, G, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - A representative survey of indoor radon in the sixteen regions in Mexico City AB - Mexico City, also called Federal District, covers an area of 1504 km, and has more than 8 million inhabitants. It is located more than 2200 m above sea level in a zone of high seismic activity, and founded oil an ancient lake. At present it is one of the most crowded and contaminated cities in the world, with thermal inversions. Chemical contaminants and aerosol particles in the environmental air are high most of the year. Due to these geological, environmental and socioeconomic conditions, Federal District presents very peculiar characteristics, which are important for understanding the distribution and measurements of indoor radon concentration. In this work the results of 3 year (1998-2000) measurements of indoor radon levels in the Federal District are presented. For the detector distribution and measurements, the actual political administrative divisions of the Federal District, consisting of 16 very well defined zones, was used. Nuclear track detection methodology was selected for the measurement, with a passive device close-end-cup system with CR-39 (Lantrack(R)) polycarbonate as the detection material, with one step chemical etching, following a very well established protocol developed at the Instituto de Fisica, UNAM. Calibration was carried out at the Oak Ridge National Laboratory, and verification at the Instituto de Fisica chamber. The results show that the arithmetical mean values of the indoor radon concentration for each region of the Federal District follow a non-homogenous distribution MH - Mexico|Distrito Federal MH - USA PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000181497000011 L2 - LONG-TERM; SYSTEM SO - Radiation Protection Dosimetry 2003 ;103(1):73-76 7939 UI - 7620 AU - Espinosa JJ AU - Camacho-Carranza R AU - Escobar-Garcia D AU - Dorado V AU - Perez I AU - Cancino-Badias L AU - Ibarraran S AU - Burgos R AD - UNAM, Genet Toxicol Inst Invest Biomed, Mexico City, DF, MexicoInst Nacl Pediat, Torre Invest Dr Joaquin Cravioto, Mexico City, DF, MexicoUniv La Habana, CIBIOMED, ICBP Victoria Giron, Cd La Habana, Cuba TI - Bioactivation of nitrocompounds by pathogenic microorganisms MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518501021 SO - Toxicological Sciences 2003 ;72():209-209 7940 UI - 9393 AU - Espinosa LE AU - Li ZY AU - Barreto DG AU - Jaimes EC AU - Rodriguez RS AU - Sakota V AU - Facklam RR AU - Beall B AD - Ctr Dis Control & Prevent, Div Bacterial & Mycot Dis, Resp Dis Branch, Atlanta, GA 30333, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City 06720, DF, MexicoBeall, B, Ctr Dis Control & Prevent, Div Bacterial & Mycot Dis, Resp Dis Branch, Mail Stop C0-2,1600 Clifton Rd NE, Atlanta, GA 30333 USA TI - M protein gene type distribution among group A streptococcal clinical isolates recovered in Mexico City, Mexico, from 1991 to 2000, and Durango, Mexico, from 1998 to 1999: Overlap with type distribution within the United States AB - To examine the type distribution of pathogenic group A streptococcal (GAS) strains in Mexico, we determined the emm types of 423 GAS isolates collected from ill patients residing in Mexico (Durango or Mexico City). These included 282 throat isolates and 107 isolates from normally sterile sites. Of the other isolates, 38 were recovered from other miscellaneous infections. A total of 31 different emm types were found, revealing a broad overlap between commonly occurring emm types in Mexico and the United States. The information obtained in this study is consistent with the possibility that multivalent, M type-specific vaccines prepared for GAS strain distribution within the United States could theoretically protect against the majority of GAS strains causing disease in the two cities surveyed in Mexico MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 16 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000180406700058 L2 - GROUP-A STREPTOCOCCI; EPIDEMIOLOGY; PHARYNGITIS; POPULATION; SEQUENCES SO - Journal of Clinical Microbiology 2003 ;41(1):373-378 7941 UI - 8750 AU - Estrada-Badillo C AU - Marquez-Rocha FJ AD - Univ Autonoma Baja California, Fac Ciencias Marinas, Mexicali 21100, Baja California, MexicoCICESE, Dept Biotecnol Marina, Ensenada 22860, Baja California, MexicoMarquez-Rocha, FJ, POB 434844, San Diego, CA 92143, USA TI - Effect of agitation rate on biomass and protease production by a marine bacterium Vibrio harveyi cultured in a fermentor AB - A marine bacterium Vibrio harveyi was adapted to grow and produce extracellular proteases in a seawater/Zobell-based medium, supplemented with skim milk under different hydrodynamic conditions, namely agitation and aeration rates. The addition of skim milk to Zobell medium enhanced fivefold the extracellular enzyme production. Protease production seemed to take place after maximum luminescence had been produced. Specific growth rate increased as a consequence of increasing agitation rates. The maximum activity of 4.28 units mg(-1) protein were formed with 700 rev min(-1) and 0.5 v/v/m. Protease activity detected has a molecular weight of 34 kDa. Another minor band of protease activity was found at 40 kDa MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000182132100003 L2 - extracellular proteases;hydrodynamic conditions;marine bacteria;marine fermentation;CYSTEINE PROTEASE; MICROORGANISMS; STRAIN; OXYGEN SO - World Journal of Microbiology & Biotechnology 2003 ;19(2):129-133 7942 UI - 6911 AU - Estrada-Baltazar A AU - De Leon-Rodriguez A AU - Hall KR AU - Ramos-Estrada M AU - Iglesias-Silva GA AD - Inst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, MexicoUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, MexicoInst Potosino Invest Cient & Tecnol, Dept Mol Biol, San Luis Potosi 78210, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, Mexico TI - Experimental densities and excess volumes for binary mixtures containing propionic acid, acetone, and water from 283.15 K to 323.15 K at atmospheric pressure AB - We present experimental density measurements for the binary systems acetone + water, propionic acid + water, and acetone + propionic acid from 283.15 K to 323.15 K over the entire composition range. A vibrating tube densimeter produced the experimental densities. We have also calculated excess volumes and correlated them with a Redlich-Kister polynomial form MH - Mexico|Guanajuato MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000186579200012 L2 - VAPOR-LIQUID-EQUILIBRIA; ACETIC-ACID; MOLAR VOLUMES; REFRACTIVE-INDEXES; CYCLIC-KETONES; VISCOSITIES; METHANOL; SYSTEMS; 2-METHYLPROPAN-2-OL; PROPAN-2-OL SO - Journal of Chemical and Engineering Data 2003 ;48(6):1425-1431 7943 UI - 6688 AU - Estrada-Franco JG AU - Navarro-Lopez R AU - Beasley DWC AU - Coffey L AU - Carrara AS AU - da Rosa AT AU - Clements T AU - Wang EY AU - Ludwig GV AU - Cortes AC AU - Ramirez PP AU - Tesh RB AU - Barrett ADT AU - Weaver SC AD - Univ Texas, Med Branch, Dept Pathol, Galveston, TX 77555, USAComis Mexico Estados Unidos Prevenc, Fiebre Aftosa & Otras Enfermendades Exot Anim, Mexico City, DF, Mexico, USA, Med Res Inst Infect Dis, Ft Detrick, MD 21702 USAWeaver, SC, Univ Texas, Med Branch, Dept Pathol, Galveston, TX 77555 USA TI - West Nile virus in Mexico: Evidence of widespread circulation since July 2002 AB - West Nile virus (WNV) antibodies were detected in horses from five Mexican states, and WNV was isolated from a Common Raven in the state of Tabasco. Phylogenetic studies indicate that this isolate, the first from Mexico, is related to strains from the central United States but has a relatively high degree of sequence divergence MH - Mexico|Distrito Federal MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 53 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000187247600016 L2 - SEROLOGIC EVIDENCE; NEUROINVASIVENESS; ENCEPHALITIS; INFECTION; STRAINS; HORSES; STATE SO - Emerging Infectious Diseases 2003 ;9(12):1604-1607 7944 UI - 7218 AU - Estrada-Luna AA AU - Davies FT AD - Ist Politecn Nacl, Ctr Invest & Estudios Avanzdos, Unidad Irapuato, Irapuato 36500, Gto, MexicoTexas A&M Univ, Dept Hort Sci, College Stn, TX 77843, USADavies, FT, Ist Politecn Nacl, Ctr Invest & Estudios Avanzdos, Unidad Irapuato, Km 9-6 Lib Norte Carretera Irapuato Leon,Apdo Pos, Irapuato 36500, Gto, Mexico TI - Arbuscular mycorrhizal fungi influence water relations, gas exchange, abscisic acid and growth of micropropagated chile ancho pepper (Capsicum annuum) plantlets during acclimatization and postacclimatization AB - Little is known about the role of arbuscular mycorrhiza fungi (AMF) on physiological changes of micropropagated plantlets during acclimatization and post-acclimatization, Using chile ancho pepper (Capsicum annuum L. cv. San Luis), measurements were made of water relations, gas exchange, abscisic acid (ABA), plantlet growth and AMF development. Plantlets had low photosynthetic rates (A) and poor initial growth during acclimatization. Relative water content (RWC) decreased during the first days after transfer from tissue culture containers to ex vitro conditions. Consequently, transpiration rates (E) and stomatal conductance (g(s)) declined, confirming that in vitro formed stomata were functional and able to respond ex vitro to partial desiccation - thus avoiding excessive leaf dehydration and plant death. Colonization by AMF occurred within 3 days after inoculation. Colonized plantlets had lower leaf ABA and higher RWC than noncolonized (NonAMF) plantlets during peak plant dehydration (6 days after plant transfer) - and a higher A and g(s) as early as days 5 and 7. During post-acclimatization [after day 8, when RWC increased and stabilized], A increased in all plantlets; however, more dramatic changes occurred with AMF plantlets. Within 48 days, 45 % of the roots sampled of inoculated plantlets were colonized and had extensive arbuscule development. At this time, AMF plantlets also had greater E, A, leaf chlorophyll, leaf elemental N, P and K, leaf dry bio-mass and leaf area, fruit production and differences in carbon partitioning [lower root/shoot ratio and higher leaf area ratio] compared with NonAMF plantlets. Rapid AMF colonization enhanced physiological adjustments, which helped plantlets recover rapidly during acclimatization and obtain greater growth during post-acclimatization MH - Mexico|Guanajuato MH - USA PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000185989200012 L2 - acclimatization;endomycorrhiza;gas exchange;micropropagation;pepper;photosynthesis;JASMINE TRACHELOSPERMUM-ASIATICUM; ADVENTITIOUS ROOT-FORMATION; EX-VITRO ACCLIMATIZATION; TREE ARGANIA-SPINOSA; CV SAN-LUIS; IN-VITRO; GLOMUS INTRARADICES; DROUGHT; L.; PHOSPHORUS SO - Journal of Plant Physiology 2003 ;160(9):1073-1083 7945 UI - 8449 AU - Estrada-Torres A AU - Ramirez-Ortega JM AU - Lado C AD - Univ Autonoma Tlazcala, Ctr Invest Ciencias Biol, Tlaxcala 90000, MexicoCSIC, Real Jardin Bot, E-28014 Madrid, SpainEstrada-Torres, A, Univ Autonoma Tlazcala, Ctr Invest Ciencias Biol, Apdo Postal 183, Tlaxcala 90000, Mexico TI - Calonema foliicola a new myxomycete from Mexico AB - A new species of myxomycete, Calonema foliicola Estrada, J. M. Ramirez & Lado, recorded in the Mexican states of Chihuahua, Hidalgo and Tlaxcala is described. The most relevant characters of this species are the scattered, minute and stalked sporocarps, the red color of the sporotheca and the capillitium, with a faint and irregular reticulum MH - Mexico|Tlaxcala MH - Spain PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000182874500018 L2 - leaf litter;morphology;Quercus;taxonomy;Trichiales SO - Mycologia 2003 ;95(2):354-359 7946 UI - 6821 AU - Estrada-Vazquez C AU - Macarie H AU - Kato MT AU - Rodriguez-Vazquez R AU - Esparza-Garcia F AU - Poggi-Varaldo HM AD - CINVESTAV, IPN, Dept Bioengn & Biotechnol, Envrionm Biotechnol R&D Grp, Mexico City 07000, DF, MexicoIRD, Marseille, FranceUniv Fed Pernambuco, Recife, PE, BrazilEstrada-Vazquez, C, CINVESTAV, IPN, Dept Bioengn & Biotechnol, Envrionm Biotechnol R&D Grp, POB 14-740, Mexico City 07000, DF, Mexico TI - The effect of the supplementation with a primary carbon source on the resistance to oxygen exposure of methanogenic sludge AB - Anaerobic methanogenic consortia have a considerable resistance to oxygen exposure. Yet, most research has been focused on the study of the tolerance to oxygen of anaerobic immobilized biomass. Less is known on the potential of the anaerobic suspended biomass for withstanding exposure to oxygen and the effect of a primary degradable substrate on such resistance. Thus, the objective of this work was to determine the effect of the amount of a primary degradable substrate (sucrose) on the resistance of a methanogenic suspended biomass to oxygen exposure. It was found that the inhibition of disperse anaerobic sludge by oxygen exposure decreases when the concentration of the supplemented carbon source increases. This is in agreement with the fact that aerobic respiration of the added substrate by the facultative heterotrophic bacteria, always present in this type of sludge, has been found in previous studies as one of the main mechanisms protecting methanogens against O-2. From a practical point of view, this suggests that aeration of anaerobic systems should be possible without inhibiting the activity of methanogenic bacteria if an adequate ratio between oxygen and COD feeding is maintained. Such a ratio will depend however on the wastewater initial COD concentration MH - Brazil MH - France MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000186741700017 L2 - anaerobic;carbon source;methanogenic activity;oxygen exposure;resistance;sludge;WASTE-WATER TREATMENT; ANAEROBIC-DIGESTION; GRANULAR SLUDGE; REACTOR SO - Water Science and Technology 2003 ;48(6):119-124 7947 UI - 6690 AU - Estrada H AU - Martinez A AU - Pastor O AD - Tech Univ Valencia, Valencia, Spain. CENIDET, Cuernavaca, Morelos, Mexico TI - Goal-based business modeling oriented towards late requirements generation AB - Recently, a lot of research efforts in software engineering have focused on integrating business modeling as a key piece in requirements engineering. In these research works, the business models are proposed as the source of the software requirements specification process. However, the majority of these works focus only on the definition of notations that permit the representation of the semantics of the organizational context, and only a few works define processes to generate business models and to use these to generate a requirements model. This lack of both generation methods and traceability relationships between models makes practical application in software development enterprises difficult. The objective of this paper is to define a goal-based methodological approach for the generation of business models and to use these models as the starting point for the process of software requirements specification. This will enable us to develop information systems that integrate the necessary functionality so that the business actors perform their tasks and fulfill their goals MH - Mexico|Morelos MH - Spain T3 - CONCEPTUAL MODELING - ER 2003Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY03T AV - English IS - 0302-9743 UR - ISI:000187325600023 SO - 2003 ;():277-290 7948 UI - 8919 AU - Estrada M AU - Afzalian A AU - Flandre D AU - Cerdeira A AU - Baez H AU - de Lucca A AD - CINVESTAV, SEES, Mexico City 07300, DF, MexicoMicroelect Lab, B-1348 Louvain, BelgiumCINVESTAV, Secc Computac, Mexico City 07300, DF, MexicoEstrada, M, CINVESTAV, SEES, Av IPN 2508,Apto Postal 14-740, Mexico City 07300, DF, Mexico TI - FD MOS SOI circuit to enhance the ratio of illuminated to dark current of a co-integrated a-Si : H photodiode AB - In this paper we first present the integration of amorphous silicon photodiodes with a fully depleted silicon on isolator (FD SOI) MOSFET circuit. Taking the advantage of the better subthreshold characteristic of FD SOI MOSFETs with respect to bulk devices, a very simple SOI circuit integrated with the amorphous silicon photodiode is presented to significantly improve the ratio of the circuit output current when the diode is illuminated to when it is not. The use of one additional reference source voltage to adjust the operating point of the photodiode, allows to obtain a very significant increase in this current ratio, much higher than what can be obtained using a simple diode. Circuit solutions used to amplify the diode current under illumination are usually more complicated and involve a capacitor or more transistors than the circuit we present. All the other properties of the photodetector, as its spectral characteristic and linear dependence of detection with light intensity are maintained. The circuit can also be used in conjunction with other circuits for further amplification and/or processing, (C) 2002 Elsevier Science Ltd. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 0026-2714 UR - ISI:000181524200003 SO - Microelectronics Reliability 2003 ;43(2):189-193 7949 UI - 7316 AU - Estrada MB AU - Malabre M AD - CNRS, UMR 6597, IRCC&N, F-44321 Nantes 03, FranceInst Politecn Nacl, CINVESTAV, Mexico City 07000, DF, Mexico TI - On the control of linear systems having internal variations AB - It is shown how non-square implicit descriptions can be used for modelling broad classes of linear systems, including systems with internal switches. Necessary and sufficient conditions, expressed in terms of the overall implicit model, exist for controlling it so that it has a unique behaviour (whatever be the internal structure variations). The objective here is to enhance from these conditions the parts which are due to the common internal dynamic equation and, respectively, to the algebraic constraints which are "controlled" (in a hidden way) by the degree of freedom. It is shown how to embed the variable internal structure present in square implicit descriptions inside an (A, E, B) invariant subspace contained in the kernel of the output map. Owing to this embedding, the variable internal structure is made unobservable and in this way a proper closed-loop system with a controllable pre specified structure is obtained. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000185815800016 L2 - variable structure systems;implicit systems;structural properties;linear systems;geometric approach;IMPLICIT DESCRIPTIONS; DESCRIPTOR SYSTEMS; CONTROLLABILITY; OBSERVABILITY; OUTPUT SO - Automatica 2003 ;39(11):1989-1996 7950 UI - 6860 AU - Ettinger A AU - Peterson K AU - Amarasiriwardena C AU - Hu H AU - Hernandez-Avila MF AD - Harvard Univ, Sch Publ Hlth, Cambridge, MA 02138, USAHarvard Univ, Sch Med, Channing Lab, Cambridge, MA 02138, USANatl Inst Publ Hlth, Mexico City, DF, Mexico TI - Relation of nutrient intake to levels of lead in maternal blood, bone, and breast milk among lactating women at one-month postpartum MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000185488600218 SO - Epidemiology 2003 ;14(5):S92-S92 7951 UI - 7315 AU - Falcon V AU - costa-Rivero N AU - Chinea G AU - de la Rosa MC AU - Menendez I AU - Gra B AU - Rodriguez A AU - Tsutsumi V AU - Shibayama M AU - Luna-Munoz J AU - Miranda-Sanchez MM AU - Morales-Grillo J AU - Kouri J AD - Ctr Genet Engn & Biotechnol, Div Biomed, Havana CP 10600, CubaInst Gastroenterol, Havana CP 10400, CubaIPN, CINVESTAV, Mexico City 07738, DF, MexicoFalcon, V, Ctr Genet Engn & Biotechnol, Div Biomed, POB 6162, Havana CP 10600, Cuba TI - Nuclear localization of nucleocapsid-like particles and HCV core protein in hepatocytes of a chronically HCV-infected patient AB - Little is known about the life cycle of hepatitis C virus. Determination of the subcellular localization of HCV proteins may contribute to our understanding of the in vivo functions of the viral proteins. HCV core protein regulates multiple functions in host cells and it has been detected both in the cytoplasm and in the nucleus using different expression systems. In this study, nucleocapsid-like particles were observed in the nucleus of hepatocytes from a chronically HCV-infected patient. They were similar in size and shape to those of HCV core-like particles purified from recombinant Pichia pastoris cells. In addition the HCV core protein was detected not only in the cytoplasm but also in the nucleus and nucleolus of hepatocytes by immunoelectron microscopy. This is the first report showing nuclear localization of HCV core protein and nucleocapsid-like particles in hepatocytes during in vivo HCV infection. (C) 2003 Elsevier Inc. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000185835500009 L2 - HCV;core protein;virus-like particles;transmission electron microscopy;immunoelectron microscopy;HEPATITIS-C VIRUS; SUBCELLULAR-LOCALIZATION; ELECTRON-MICROSCOPY; INSECT CELLS; SUPPRESSION; EXPRESSION; EVIDENCES; YEAST SO - Biochemical and Biophysical Research Communications 2003 ;310(1):54-58 7952 UI - 7228 AU - Fall C AU - Chaouki J AU - Chavarie C AU - Elena-Ortega R AD - Univ Autonoma Estado Mexico, CIRA, Mexico City 50091, DF, MexicoEcole Polytech, Dept Chem Engn, Stn Ctr Ville, Montreal, PQ H3C 3A7, CanadaFall, C, Univ Autonoma Estado Mexico, CIRA, Apdo Postal 367, Mexico City 50091, DF, Mexico TI - Multivariate study on phenanthrene sorption in soils AB - Batch tests and different statistical tools of data analysis were used to re-evaluate the overall effect of soil characteristics and liquid phase composition on the extent of phenanthrene adsorption in complex soil-water systems. The linear isotherm models was capable of adequately describing the equilibrium data under extremely varying conditions of soil type, environmental conditions (pH, temperature, ionic strength) and amendments (surfactant, oil, dispersing agent, glucose). Consistent with existing mechanistic models, the multivariate approach also identified the organic carbon content (f(oc)) of soil as the key parameter controlling the phenanthrene adsorption constant (K-d) in nonamended systems (K-oc was 17,700 mL/g). From studying the effect of the amendments, two interactions (surfactant-pH and surfactant-oil) and two main effects (surfactant and oil) have been detected. An empirical linear model of K-d as a function of f(oc) pH, oil content of soil, and surfactant dose was developed for the range of conditions studied. The proposed model and modeling approach can be adapted to other types of contaminants or variables for specific natural and engineered systems MH - Canada MH - Mexico|Distrito Federal PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0733-9372 UR - ISI:000186006500009 L2 - adsorption;oil;soils;surface-active agents;CONTAMINATED SOILS; WATER; ADSORPTION; NAPHTHALENE; SURFACTANTS; DESORPTION; POLLUTANTS; SEDIMENTS; PARTITION; TRANSPORT SO - Journal of Environmental Engineering-Asce 2003 ;129(11):1030-1040 7953 UI - 7972 AU - Falomir E AU - Murga J AU - Ruiz P AU - Carda M AU - Marco JA AU - Pereda-Miranda R AU - Fragoso-Serrano M AU - Cerda-Garcia-Rojas CM AD - Univ Jaume 1, Dept Quim Inorgan & Organ, E-12080 Castellon, SpainUniv Valencia, Dept Quim Organ, E-46100 Burjassot, SpainNatl Autonomous Univ Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoMarco, JA, Univ Jaume 1, Dept Quim Inorgan & Organ, E-12080 Castellon, Spain TI - Stereoselective synthesis and determination of the cytotoxic properties of spicigerolide and three of its stereoisomers AB - Stereoselective syntheses of the naturally occurring, cytotoxic lactone spicigerolide and three nonnatural stereoisomers thereof are described. The commercially available sugar L-rhamnose was in all cases the chiral starting material. Key steps in each of these syntheses were asymmetric Brown allylations and ring-closing metatheses. The cytotoxic activities of the four lactones against a range of tumoral lines were then determined MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000184060600028 L2 - RING-CLOSING METATHESIS; CONVERGENT TOTAL SYNTHESIS; PURE BUILDING-BLOCKS; ASYMMETRIC-SYNTHESIS; OLEFIN METATHESIS; (+)-BORONOLIDE; (-)-MALYNGOLIDE; (+)-TANIKOLIDE; (-)-ANAMARINE; ALLYLBORATION SO - Journal of Organic Chemistry 2003 ;68(14):5672-5676 7954 UI - 8524 AU - Farias A AU - Garcia-Esquivel Z AU - Viana MT AD - Univ Austral Chile, Inst Acuicultura, Puerto Montt, ChileUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoViana, MT, Univ Austral Chile, Inst Acuicultura, POB 1327, Puerto Montt, Chile TI - Physiological energetics of the green abalone, Haliotis fulgens, fed on a balanced diet AB - A regression of different physiological responses against body size enables populations or stock cultures of various size ranges to be compared. Thus, the aim of the present work was to evaluate the physiological responses from juvenile green abalone (Haliotis fulgens), grouped according to size, in a standard controlled culture condition within their optimal range to create the balanced growth equation within an allometric relation, providing a basic framework for physiological research into H. fulgens. Feed intake, absorption efficiency, respiration and excretion were measured as functions of dry tissue weight (DTW) in juvenile abalone acclimated on a balanced diet. The daily feed intake (1) was related to body mass by the relationship I (mg day(-1)) = 24.25W(0.59). Absorption efficiency averaged 87% and was independent of body size. The equation relating daily respiration rate (R) to body mass was R (ml O-2 day(-1))= 12.013W(0.704), including night correction. The rate of ammonia excretion (0 was related to dry tissue weight by the equation U (mumol N-NH4 day(-1)) = 43.57W(0.85). The energetic value of food was 18.8 J mg(-1). The low feeding activity (< 1% of abalone live weight per day) was compensated for by a relatively high absorption efficiency and a depression of 23% in the metabolic rate during diurnal activity. Gross and net growth efficiencies were constant throughout the size range, with average values of 36.4% and 41.5%, respectively. Values of the ON ratio, with an average of 31.5, showed a higher use of proteins from the diet as an energy source for the size range studied. (C) 2003 Elsevier Science B.V. All rights MH - Chile MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000182626900005 L2 - balanced diet;energetics;Haliotis fulgens;nutrition;physiology;NUTRITIONAL-REQUIREMENTS; FISH SO - Journal of Experimental Marine Biology and Ecology 2003 ;289(2):263-276 7955 UI - 6858 AU - Farias P AU - De Jager C AU - Dewailly E AU - Hernandez-Avila M AD - Inst Nacl Salud Publ, Mexico City, DF, MexicoUniv Laval, Ctr Rech Biol Reprod, Quebec City, PQ, CanadaUniv Laval, CHUQ, CHUL, Ctr Rech,Unite Rech Sante Publ, Quebec City, PQ, Canada TI - Endocrine disruption related to DDT and DDE in non-occupationally exposed men from Chiapas, Mexico MH - Canada MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000185488600004 SO - Epidemiology 2003 ;14(5):S13-S13 7956 UI - 8358 AU - Farjon A AU - Garcia SC AD - Royal Bot Gardens, Richmond TW9 3AB, Surrey, EnglandUniv Nacl Autonoma Mexico, Lab Genet Mol & Evoluc, Inst Ecol, Mexico City 04510, DF, MexicoFarjon, A, Royal Bot Gardens, Richmond TW9 3AB, Surrey, England TI - Cone and ovule development in Cunninghamia and Taiwania (Cupressaceae sensu lato) and its significance for conifer evolution AB - We examined the early developmental stages of the seed cones and seeds of two conifer genera, Cunninghamia and Taiwania, using scanning electron microscope (SEM) images of freshly collected material. In recent similar studies, these two taxa were not described. The present paper aims to fill that gap. Both genera appear to have features crucial to the understanding of the evolution of the cupressaceous cone, characteristic of the families Cupressaceae and Taxodiaceae, and provide further evidence for the need to merge these families. These features are: the ovuliferous scale in Cunninghamia develops as a small lobe with each of three ovules; in Taiwania these lobes are absent, but a small ridge could be a vestige of them. In neither of these two genera does an ovuliferous scale develop to maturity and only limited intercalary growth transforms the bracts, of which only their width and final shape distinguishes them from sterile leaves. Thus, the bracts, not the ovuliferous scales, form the mature cone in these two genera. This trend is continued in more derived genera of Cupressaceae. Another key extant taxon that has helped to elucidate the evolution of this type of conifer cone is Sciadopitys; similar studies have already been done on this genus, and we compared our findings to them. We also considered certain fossil Mesozoic conifer cones, which shed further light on the evolution of the cupressaceous cone. The evidence from these various genera strongly indicates that recently reconstructed phylogenies of gymnosperms based on molecular evidence from extant taxa do not reflect the evolution that actually happened. Such studies need to take into account nonmolecular evidence, as detailed here MH - United Kingdom MH - Mexico|Distrito Federal PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000183132800002 L2 - conifers;Cunninghamia;Cupressaceae;evolution;Mesozoic ovuliferous cones;ontogeny;phylogeny;Sciadopitys;Taiwania;Taxodiaceae;PHYLOGENETIC-RELATIONSHIPS; MOLECULAR PHYLOGENY; SEED CONE; TAXODIACEAE; SEQUENCES; ONTOGENY; SCIADOPITYACEAE; FAMILY; GENE; NOV SO - American Journal of Botany 2003 ;90(1):8-16 7957 UI - 7531 AU - Feder JL AU - Berlocher SH AU - Roethele JB AU - Dambroski H AU - Smith JJ AU - Perry WL AU - Gavrilovic V AU - Filchak KE AU - Rull J AU - Aluja M AD - Univ Notre Dame, Dept Biol Sci, Galvin Life Sci Ctr, Notre Dame, IN 46556, USAUniv Illinois, Dept Entomol, Urbana, IL 61801, USAMichigan State Univ, Dept Zool, E Lansing, MI 48824, USAMichigan State Univ, Lyman Briggs Sch, E Lansing, MI 48824, USAIllinois State Univ, Dept Biol Sci, Normal, IL 61790, USAAsociac Civil, Inst Ecol, Xalapa 91070, Veracruz, MexicoFeder, JL, Univ Notre Dame, Dept Biol Sci, Galvin Life Sci Ctr, POB 369, Notre Dame, IN 46556 USA TI - Allopatric genetic origins for sympatric host-plant shifts and race formation in Rhagoletis AB - Tephritid fruit flies belonging to the Rhagoletis pomonella sibling species complex are controversial because they have been proposed to diverge in sympatry (in the absence of geographic isolation) by shifting and adapting to new host plants. Here, we report evidence suggesting a surprising source of genetic variation contributing to sympatric host shifts for these flies. From DNA sequence data for three nuclear loci and mtDNA, we infer that an ancestral, hawthorn-infesting R. pomonella population became geographically subdivided into Mexican and North American isolates approximate to1.57 million years ago. Episodes of gene flow from Mexico subsequently infused the North American population with inversion polymorphism affecting key diapause traits, forming adaptive clines. Sometime later (perhaps +/-1 million years), diapause variation in the latitudinal clines appears to have aided North American flies in adapting to a variety of plants with differing fruiting times, helping to spawn several new taxa. Thus, important raw genetic material facilitating the adaptive radiation of R. pomonella originated in a different time and place than the proximate ecological host shifts triggering sympatric divergence MH - USA MH - Mexico|Veracruz PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 48 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000185119300034 L2 - APPLE MAGGOT FLY; POMONELLA DIPTERA; UNITED-STATES; MODERN HUMANS; DIVERGENCE; EVOLUTION; HYBRIDIZATION; TEPHRITIDAE; DIFFERENTIATION; POPULATIONS SO - Proceedings of the National Academy of Sciences of the United States of America 2003 ;100(18):10314-10319 7958 UI - 7867 AU - Fedorov VI AU - Popova SS AU - Pisarchik AN AD - Russian Acad Sci, Inst Laser Phys, Siberian Branch, Novosibirsk 630090, RussiaCtr Invest Opt, Leon 37150, Gto, MexicoFedorov, VI, Russian Acad Sci, Inst Laser Phys, Siberian Branch, Prospect Acad Lavrentiev 13-3, Novosibirsk 630090, Russia TI - Dynamic effects of submillimeter wave radiation on biological objects of various levels of organization AB - We have presented an overview of the literature and of our experimental data on the influence of electromagnetic radiation in the submillimeter spectral region on biological objects of molecular, cellular, and organism levels. Possible physical mechanisms involved and the reasons for limited development of the research in this spectral range are discussed MH - Mexico|Guanajuato MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 0195-9271 UR - ISI:000184320200002 L2 - biological effects;submillimeter wave radiation;coherent vibrations;somatic mutations;free electron laser;FREE-ELECTRON LASERS; BOSE-CONDENSATION; LIVING CELLS; SYSTEMS; DNA; MICROTUBULES; EXCITATIONS; IRRADIATION; BIOSYSTEMS; MYOGLOBIN SO - International Journal of Infrared and Millimeter Waves 2003 ;24(8):1235-1254 7959 UI - 8236 AU - Fedrizzi L AU - Rodriguez FJ AU - Rossi S AU - Deflorian F AD - Univ Roma La Sapienza, Dept ICMMPM, I-00184 Rome, ItalyUNAM, Fac Quim, Dept Ing Met, Mexico City 04510, DF, MexicoUniv Trent, Dipartimento Ingn Mat, I-38130 Trent, ItalyFedrizzi, L, Univ Roma La Sapienza, Dept ICMMPM, Via Eudossiana 18, I-00184 Rome, Italy TI - Corrosion study of industrial painting cycles for garden furniture (vol 46, pg 62, 2003) AB - Different cycles of industrial painting of steel and galvanised steel for making garden furniture were studied in order to overcome problems in covering tips, edges, sharp corners, commonly found in practice. Painting cycles, including cataphoresis or a Brugal(R) treatment, were used. The following characterisation was carried out: (a) measurement of the film thickness of the coating; (b) evaluation of the defects in the organic coating; (c) corrosion resistance in a salt fog chamber according to ASTM standard B117 and (d) electrochemical impedance measurements. In general terms, test have yielded good results in assessing the best performance with different industrial cycles of painting. Good performance of every cycle has been shown in geometrically simple samples (tubes externally coated), while the corrosion behaviour of geometrically complex shapes (stretched net, round-drilled and stamped sheets) strictly depends on the selected painting cycle. The experimental results showed the effectiveness of the cataphoretic primer in increasing metal substrate coverage, so increasing corrosion resistance. The same was not obtained by using a Brugal(R) pre-treatment. Galvanised steel performed better than not galvanised one in the salt fog chamber test, but this result was not confirmed by electrochemical impedance spectroscopy (EIS) data. This electrochemical technique confirmed to be really a useful tool to clarify the behaviour of protected samples under accelerated corrosion conditions MH - Italy MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Materials Science, Coatings & Films U5 - J;Correction AV - English IS - 0300-9440 UR - ISI:000183437200013 L2 - cataphoresis;powder painting;corrosion resistance;surface pre-treatments;conformal coating SO - Progress in Organic Coatings 2003 ;46(3):229-229 7960 UI - 9373 AU - Fedrizzi L AU - Rodriguez FJ AU - Rossi S AU - Deflorian F AD - Univ Roma La Sapienza, Dept ICMMPM, I-00184 Rome, ItalyNatl Autonomous Univ Mexico, Fac Quim, Dept Ing Met, Mexico City 04510, DF, MexicoUniv Trent, Dept Ingn Mat, I-381030 Trento, ItalyFedrizzi, L, Univ Roma La Sapienza, Dept ICMMPM, Via Eudossiana, I-00184 Rome, Italy TI - Corrosion study of industrial painting cycles for garden furniture AB - Different cycles of industrial painting of steel and galvanised steel for making garden furniture were studied in order to overcome problems in covering tips, edges, sharp corners, commonly found in practice. Painting cycles, including cataphoresis or a Brugal((R)) treatment, were used. The following characterisation was carried out: (a) measurement of the film thickness of the coating; (b) evaluation of the defects in the organic coating; (c) corrosion resistance in a salt fog chamber according to ASTM standard B 117 and (d) electrochemical impedance measurements. In general terms, test have yielded good results in assessing the best performance with different industrial cycles of painting. Good performance of every cycle has been shown in geometrically simple samples (tubes externally coated), while the corrosion behaviour of geometrically complex shapes (stretched net, round-drilled and stamped sheets) strictly depends on the selected painting cycle. The experimental results showed the effectiveness of the cataphoretic primer in increasing metal substrate coverage, so increasing corrosion resistance. The same was not obtained by using a Brugal((R)) pre-treatment. Galvanised steel performed better than not galvanised one in the salt fog chamber test, but this result was not confirmed by electrochemical impedance spectroscopy (EIS) data. This electrochemical technique confirmed to be really a useful too] to clarify the behaviour of protected samples under accelerated corrosion conditions. (C) 2002 Published by Elsevier Science B.V MH - Italy MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Materials Science, Coatings & Films U5 - J;Review AV - English IS - 0300-9440 UR - ISI:000180451800008 L2 - cataphoresis;powder painting;corrosion resistance;surface pre-treatments;conformal coating;IMPEDANCE; COATINGS; PERFORMANCE; METALS; STEEL SO - Progress in Organic Coatings 2003 ;46(1):62-73 7961 UI - 7248 AU - Feldman H AU - Juszkiewicz R AU - Ferreira P AU - Davis M AU - Gaztanaga E AU - Fry J AU - Jaffe A AU - Chambers S AU - da Costa L AU - Bernardi M AU - Giovanelli R AU - Haynes M AU - Wegner G AD - Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045, USAHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelZielona Gora Univ, Inst Astron, PL-65265 Zielona Gora, PolandCopernicus Astron Ctr, PL-00716 Warsaw, PolandSiege Social, Observ Cote Azur, F-06304 Nice 4, FranceUniv Oxford, Dept Astrophys, Oxford OX1 3RH, EnglandUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAConsejo Super Invest Cient, Inst Estudis Espacials Catalunya, Barcelona 08034, SpainInst Nacl Astrofis Opt & Elect, Puebla 7200, MexicoUniv Florida, Dept Phys, Gainesville, FL 32611, USAUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, EnglandEuropean So Observ, D-85748 Garching, GermanyCarnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213, USACornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853, USADartmouth Coll, Dept Phys & Astron, Hanover, NH 03755, USAFeldman, H, Univ Kansas, Dept Phys & Astron, Malott Hall,1251 Wescoe Hall Dr,Room 1082, Lawrence, KS 66045 USA TI - An estimate of Omega(m) without conventional priors AB - Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density parameter Omega(m) and the amplitude of density fluctuations sigma(8). Our results suggest that our statistic is a robust and reproducible measure of the mean pairwise velocity and thereby the Omega(m) parameter. We get Omega(m) = 0.30(-0.07)(+0.17) and sigma(8) = 1.13(-0.23)(+0.22) These estimates do not depend on prior assumptions on the adiabaticity of the initial density fluctuations, the ionization history, or the values of other cosmological parameters MH - United Kingdom MH - France MH - Germany MH - Israel MH - USA MH - Mexico|Puebla MH - Poland MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185916100002 L2 - cosmological parameters;cosmology : observations;cosmology : theory;distance scale;galaxies : distances and redshifts;large-scale structure of universe;PECULIAR VELOCITY ANALYSIS; GALAXY REDSHIFT SURVEY; TULLY-FISHER RELATION; DISTANCE DATA; SC GALAXIES; UNIVERSE; DENSITY; BIAS; CALIBRATION; MOTIONS SO - Astrophysical Journal 2003 ;596(2):L131-L134 7962 UI - 7205 AU - Felipe R AD - CIMAT, Guangzhou 36000, Gto, MexicoICIMAF, Havana, CubaFelipe, R, CIMAT, Gallejon Jaliso S-N,Apdo Postal 402, Guangzhou 36000, Gto, Mexico TI - Multi-component hierarchies of double bracket equations AB - A new integrable hierarchy, with equations defined by double brackets of two matrix pseudo-differential operators (Lax pairs), is constructed. Some algebraic properties are demonstrated. It is also shown that each equation is equivalent to a certain gradient flow. A new version of the Zakharov-Shabat type equations is proved. Formal solutions of this hierarchy are constructed using a matrix "double bracket bilinear identity" MH - Cuba MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0034-4877 UR - ISI:000185944100001 L2 - bouble bracket equations;Baker-Akhiezer function SO - Reports on Mathematical Physics 2003 ;52(2):167-176 7963 UI - 8779 AU - Felipe RL AU - Lopez-Reyes N AU - Ongay F AD - CIMAT, Mexico City 36240, DF, MexicoICIMAF, Havana, CubaFelipe, RL, CIMAT, Jalisco S-N, Mexico City 36240, DF, Mexico TI - R-matrices for Leibniz algebras AB - Leibniz agebras are a generalization of Lie algebras, where no symmetry properties of the bracket are required. In this Letter we introduce a notion of R-matrices for this structure and the related Yang-Baxter equations, and discuss some of their basic properties MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0377-9017 UR - ISI:000182006800006 L2 - Leibniz algebras;R-matrices;Yang-Baxter equations SO - Letters in Mathematical Physics 2003 ;63(2):157-164 7964 UI - 6880 AU - Feliu S AU - Mariaca L AU - Simancas J AU - Gonzalez JA AU - Morcillo M AD - Inst Invest Elect, Temixco 62490, Morelos, MexicoCENIM, Madrid 28040, SpainFeliu, S, CENIM, Av Gregorio del Amo 8, Madrid 28040, Spain TI - Effect of NO2 and/or SO2 atmospheric contaminants, and relative humidity on copper corrosion AB - A Study has been made of the individual and combined roles of NO2 and SO2 atmospheric contaminants on corrosion and patina formation on copper in humid atmospheres. In most cases the combined effect of the two contaminants has been greater than the sum of their individual effects, although exception have been found with the mixture of 800 mug/m(3) NO2- + 800 mug/m(3) SO2. XPS analysis has revealed important composition changes in the outermost layer of films formed on copper, depending on the nature of the atmospheric contaminant and humidity level. The presence of sulphates and sulphites has been clearly observed in exposure to atmospheres contaminated with SO2 at 50, 70 and 90 % RH. Nitrates and nitrites have been detected in exposure to NO2 at 50 and 70 %RH, but not at 90 % RH. A hydrogenated nitrogen compound has been detected with the Mixture of NO2 and SO2 at 90 % RH In this atmosphere, a certain inhibiting effect has been seen MH - Mexico|Morelos MH - Spain PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 2 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0034-8570 UR - ISI:000186586800005 L2 - copper;XPS;humidity;NO2;SO2;atmospheric corrosion;NITROGEN-DIOXIDE; SULFUR-DIOXIDE; AIR-POLLUTANTS; PRODUCTS; METALS; WATER; XPS SO - Revista de Metalurgia 2003 ;39(4):279-288 7965 UI - 8773 AU - Felix-Medina R AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma Sinaloa, Escuela Ciencias Fis Mat, Culiacan, Sinaloa, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Toulouse 3, Phys Quant Lab, CNRS, F-31062 Toulouse, FranceFelix-Medina, R, Univ Autonoma Sinaloa, Escuela Ciencias Fis Mat, Culiacan, Sinaloa, Mexico TI - Ground-state magnetic properties of Co-N clusters on Pd(111): Spin moments, orbital moments, and magnetic anisotropy AB - The ground-state spin moments [S-z], orbital moments [L-z], and magnetic anisotropy energy (MAE) of Co-N clusters deposited on the Pd(111) surface are determined in the framework of a self-consistent, real-space tight-binding method. Two-dimensional Co-N/Pd(111) with Nless than or equal to13 show remarkably large total magnetic moments per Co atom M-z=(2[S-z]+[L-z])/N=(2.4-2.7)mu(B), which are the result of three physically distinct effects. The first and leading contribution comes, as expected, from the local spin moments [S-iz] at the Co atoms i=1-N [2[S-iz](Co)similar or equal to1.7mu(B)]. Second, significant spin moments are induced at the Pd atoms i>N close to the Co-Pd interface, which amount to about 20% of M-z [2[S-iz](Pd)=(0.2-0.3)mu(B)]. Finally, remarkably enhanced orbital magnetic moments [L-iz] are found that are responsible for approximately 20% of M-z. In the case of Co atoms, [L-iz](Co)similar or equal to(0.3-0.5)mu(B) is almost a factor of 3 larger than the Co-bulk orbital moment, while in Pd atoms [L-iz](Pd)=(0.02-0.04)mu(B) represents about 10% of the total local moment mu(iz)=2[S-iz]+[L-iz]. The dependence of the orbital moments on the orientation of the magnetization with respect to the cluster structure is quantified. These results and the associated MAEs are analyzed from a local point of view. One- and two-dimensional (2D) Co-N are considered in order to investigate the structural dependence of the magnetic behavior. The role of the cluster-surface interactions is discussed by comparison with free cluster calculations. In particular, we observe that the lowest-energy magnetization direction (easy axis) changes from in-plane to off-plane upon deposition of 2D Co-N on Pd(111). Cluster-substrate hybridizations are therefore crucial for the magnetoanisotropic behavior of magnetic islands deposited on metallic substrates MH - France MH - Mexico|San Luis Potosi MH - Mexico|Sinaloa PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000182019300093 L2 - ELECTRONIC-STRUCTURE; COBALT NANOCRYSTALS; CIRCULAR-DICHROISM; TRANSITION-METALS; FE CLUSTERS; THIN-FILMS; SURFACES; AU(111); 3D; NANOPARTICLES SO - Physical Review B 2003 ;67(9): 7966 UI - 7956 AU - Felix J AU - Berisso MC AU - Christian DC AU - Gara A AU - Gottschalk EE AU - Gutierrez G AU - Hartouni EP AU - Knapp BC AU - Kreisler MN AU - Lee S AU - Markianos K AU - Moreno G AU - Reyes MA AU - Wang MHLS AU - Wehmann A AU - Wesson D AD - Univ Guanajuato, Leon Guanajuato, MexicoUniv Massachusetts, Amherst, MA 01003, USAFermilab Natl Accelerator Lab, Batavia, IL, USAColumbia Univ, Nevis Lab, New York, NY, USALawrence Livermore Natl Lab, Livermore, CA, USAFelix, J, Univ Guanajuato, Leon Guanajuato, Mexico TI - Resonances and Lambda(0) polarization in 800 GeV/c pp -> p(diffracted)Lambda K-0(+) AB - Lambda(0) polarization from pp --> p(diffracted)Lambda(0)K(+) at 800 GeV/c in the average depends linearly on Lambda(0)K(+) invariant mass: Lambda(0) polarization is 0.635 +/- 0.036 at 1.64 GeV, consistent with zero at similar to2.195 GeV, and -0.586 +/- 0.072 at 3.200 GeV. The origin of this Lambda(0) polarization is, probably, the interference of at least two Lambda(0)K(+) resonances, created from the excitation of the target proton, due to the diffracted proton transferred momentum MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000183938800168 L2 - MAGNETIC-MOMENT; INCLUSIVE PRODUCTION; HYPERONS; PROTONS; SIGMA; BERYLLIUM SO - Nuclear Physics A 2003 ;721():805C-808C 7967 UI - 8421 AU - Ferguson BG AU - Vandermeer J AU - Morales H AU - Griffith DM AD - Colegio Frontera Sur, San Cristobal de las Casas 29290, Chiapas, MexicoUniv Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109, USAFerguson, BG, Colegio Frontera Sur, Carretera Panamer & Perifer Sur S-N, San Cristobal de las Casas 29290, Chiapas, Mexico TI - Post-agricultural succession in El Peten, Guatemala AB - We compared post-agricultural succession across the range of farming activities practiced in Guatemala's northern lowlands: agroforestry, swidden, ranching, and input-intensive monocultures. At 10 sites over 13 to 40 months we assessed the following characteristics of trees and shrubs that were >1 cm diameter at breast height: height, basal-area accumulation, recruitment of all individuals and fleshy-fruited individuals, and accumulation of all species and fleshy-fruited species. Succession, as measured by all these response variables except height, was dramatically faster on agroforestry and swidden sites than on pastures or input-intensive monocultures. Overall recruitment was faster for swiddens than for agroforests, but other response variables did not differ significantly between the two treatments. Regression results suggest that initial ground cover by herbs inhibited recruitment of woody colonists. The significant positive coefficient for initial basal area and the significant negative coefficient for distance from forest for accumulation of both fleshy-fruited individuals and species are probably explained by the behavioral responses of seed-dispersing animals. Our results suggest that the conservation strategy of discouraging swidden agriculture in favor of sedentary, input-intensive agriculture to relieve pressure on old-growth forest may be counterproductive over the long term MH - Mexico|Chiapas MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 9 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000183077800025 L2 - agricultural intensification;agroforestry;El Peten;Guatemala;Guazuma ulmifolia;Maya Biosphere Reserve;monocultures;pastures;ranching;shifting agriculture;swidden;MAYA BIOSPHERE RESERVE; PLANT SUCCESSION; SPECIES RICHNESS; FOREST RECOVERY; RAIN-FOREST; ABANDONED PASTURES; BURN AGRICULTURE; SEED DISPERSAL; KARST REGION; PUERTO-RICO SO - Conservation Biology 2003 ;17(3):818-828 7968 UI - 8573 AU - Ferket H AU - Swennen R AU - Ortuno S AU - Roure F AD - Katholieke Univ Leuven, B-3001 Heverlee, BelgiumInst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Col San Bartolo Atepehuacan, Mexico City 07730, DF, MexicoInst Francais Petr, F-92852 Rueil Malmaison, FranceFerket, H, Katholieke Univ Leuven, Celestijnenlaan 200C, B-3001 Heverlee, Belgium TI - Reconstruction of the fluid flow history during Laramide foreland fold and thrust belt development in eastern Mexico: cathodoluminescence and delta O-18-delta C-13 isotope trends of calcite-cemented fractures AB - The Cordoba Platform in eastern Mexico has been studied to reveal the deformation and fluid flow history of the Laramide fore and fold and thrust belt (FFTB) and to define the controlling parameters on hydrocarbon reservoir development. Cathodoluminescence (CL) and stable isotope analyses of calcite-cemented strata and fractures point out different episodes of fluid flow that have been coupled to the deformation agenda. This study reveals an early burial phase with host-rock-buffered fluids and overpressures resulting in hydraulic fractures that relate to foreland flexuring with additionally local karst development. Layer-parallel shortening is accompanied by expulsion of formation waters that are no longer host-rock-buffered. Subsequent folding and thrusting led to opening of vertical features and finally to the influx of meteoric fluids and telogenetic karst development in the outcropping part of the FFTB. In the tectonic front, thrust emplacement was associated with intensive fracturing and subsequent oil migration, (C) 2003 Published by Elsevier Science B.V MH - Belgium MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800031 L2 - foreland fold and thrust belt;fluid flow;diagenesis;reservoir SO - Journal of Geochemical Exploration 2003 ;78-9():163-167 7969 UI - 7182 AU - Fernald LC AU - Grantham-McGregor SM AU - Manandhar DS AU - Costello A AD - Univ Calif Berkeley, Haas Sch Business, Inst Business & Econ Res, Berkeley, CA 94720, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoUniv Coll London, Inst Child Hlth, Ctr Int Child Hlth, London, EnglandMother Infant Res Act, Kathmandu, NepalFernald, LC, Univ Calif Berkeley, Haas Sch Business, Inst Business & Econ Res, F502, Berkeley, CA 94720 USA TI - Salivary cortisol and heart rate in stunted and nonstunted Nepalese school children AB - Objective: To test the hypothesis that stunted Nepalese children have an altered stress response system when compared with matched nonstunted children in response to a battery of psychological tests. Design: Case - control study. Setting: Poor urban areas of Kathmandu, Nepal. Subjects: A total of 64 stunted ( less than - 2 s. d. height-for-age) children compared with 64 nonstunted (> - 1s. d. height-for-age) schoolchildren between 8 and 10 y old matched for school and sex. Methods: A psychological test session was administered, which included mental arithmetic and two tests of working memory. Salivary cortisol samples were obtained at five points during testing, and heart rate was measured during testing and also at baseline. Salivary cortisol samples were also obtained once early in the morning. Hemoglobin was assessed at the testing session, and extensive data were obtained on the social background of the children's families. Results: Stunted Nepalese children showed a blunted physiologic response ( salivary cortisol and heart rate) to psychological stressors (P<0.05) when compared with nonstunted children, but were not different from the nonstunted children in baseline measures, when controlling for social background. The two groups were not different in terms of social background. Conclusions: These findings suggest that childhood growth retardation may be associated with changes in physiological arousal, and that stunting could be associated with hyporesponsivity in response to psychological stress. Sponsorship: DFID (The Department for International Development, UK) MH - USA MH - United Kingdom MH - Mexico|Morelos MH - Nepal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 1 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0954-3007 UR - ISI:000186135600012 L2 - stunting;malnutrition;HPA axis;salivary cortisol;Nepal;PITUITARY-ADRENAL AXIS; ADRENOCORTICAL ACTIVITY; STRESS-RESPONSE; CHILDHOOD; REACTIVITY; AGE; STABILITY; GROWTH; FAMILY; RISK SO - European Journal of Clinical Nutrition 2003 ;57(11):1458-1465 7970 UI - 7930 AU - Fernandez-Alonso MD AU - Asensio JL AU - Canada FJ AU - Jimenez-Barbero J AU - Cuevas G AD - Consejo Super Invest Cient, Ctr Invest Biol, Madrid 28040, SpainCSIC, Inst Quim Organ, E-28006 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoJimenez-Barbero, J, Consejo Super Invest Cient, Ctr Invest Biol, C Ramiro Maeztu 9, Madrid 28040, Spain TI - G2 and DFT rigorous description of the inversion process of oxane and thiane used as simple ring systems to model sugar components MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1439-4235 UR - ISI:000184243600012 L2 - ab initio calculations;computational chemistry;conformation analysis;density functional calculations;transition states;CONFORMERS SO - Chemphyschem 2003 ;4(7):754-757 7971 UI - 8467 AU - Fernandez-Anaya G AU - Martinez-Garcia JC AU - Kucera V AD - Inst Mexicano Petr, Programa Invest Matemat Aplicadas & Computac, Mexico City 07730, DF, MexicoCzech Tech Univ, Fac Elect Engn, Prague 16627 6, Czech RepublicMartinez-Garcia, JC, Inst Mexicano Petr, Programa Invest Matemat Aplicadas & Computac, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - H-infinity-Robustness properties preservation in SISO systems when applying SPR substitutions AB - The preservation of both robust stability and weighted robust performance properties of controlled linear time-invariant single input single output (SISO) systems is studied, when performing substitutions (of the complex Laplace variable s) by a particular class of rational strictly positive real functions (SPR functions), the so-called strictly positive real functions of zero relative degree (SPR0 functions). Concerning weighted robust performance and model-matching, we provide some results on preservation of controller optimality MH - Czech Republic MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000182887200007 L2 - STRICT POSITIVE REALNESS; STABILIZATION; INTERPOLATION; STABILITY; PLANTS SO - International Journal of Control 2003 ;76(7):728-740 7972 UI - 8440 AU - Fernandez-Guasti A AU - Swaab D AU - Rodriguez-Manzo G AD - CINVESTAV, Dept Pharmacobiol, Mexico City 14330, DF, MexicoInst Brain Res, Amsterdam, NetherlandsFernandez-Guasti, A, CINVESTAV, Dept Pharmacobiol, Calz De los Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Sexual behavior reduces hypothalamic androgen receptor immunoreactivity AB - Male sexual behavior is regulated by limbic areas like the medial preoptic nucleus (MPN), the bed nucleus of the stria terminalis (BST), the nucleus accumbens (nAcc) and the ventromedial hypothalamic nucleus (VMN). Neurons in these brain areas are rich in androgen receptors (AR) and express FOS-immunoreactivity in response to mating. In many species sexual satiation, a state of sexual behavior inhibition, is attained after multiple ejaculations. The mechanisms underlying sexual satiation are largely unknown. In this study we show that sexual activity reduces androgen receptor immunoreactivity (AR-ir) in some of the brain areas associated with the control of male sexual behavior, but not in others. Thus, one ejaculation reduced the AR-ir in the MPN and nAcc, but not in the BST and VMN. Copulation to satiation, on the other hand, reduced AR-ir in the MPN, nAcc and VMN, and not in the BST. The AR-ir reduction observed in the MPN of sexually satiated rats was drastic when compared to that of animals ejaculating once. Serum androgen levels did not vary after one ejaculation or copulation to exhaustion. These data reveal that sexual activity reduces AR in specific brain areas and suggest the possibility that such a reduction underlies the sexual inhibition that characterizes sexual satiety. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0306-4530 UR - ISI:000182864000002 L2 - androgen receptor immunoreactivity;medial preoptic nucleus;male sexual exhaustion;ventromedial hypothalamic nucleus;bed nucleus of the stria terminalis;nucleus accumbens;MEDIAL PREOPTIC AREA; MALE-RATS; NUCLEUS-ACCUMBENS; DOPAMINE TRANSMISSION; FOS IMMUNOREACTIVITY; MESOLIMBIC DOPAMINE; STEROID REPLACEMENT; SYRIAN-HAMSTER; BRAIN; TESTOSTERONE SO - Psychoneuroendocrinology 2003 ;28(4):501-512 7973 UI - 8243 AU - Fernandez-Guasti M AU - onso-Pinzon RF AU - Haro-Poniatowski E AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoInst Nacl Astrofis Opt Electron, Puebla 72000, MexicoHaro-Poniatowski, E, CSIC, Inst Opt, Serrano 121, E-28006 Madrid, Spain TI - Image reconstruction via phase conjugation in amorphous chalcogenide thin films AB - The restoration of an image is demonstrated using phase conjugation (PC) in amorphous GexSe1-x thin films. An unconventional degenerate four-wave mixing scheme is used, where no external counter propagating pump beam is required. Various film configurations are reported that support the proposal that this wave is generated near the front surface of the nonlinear material. The PC signal behavior as a function of time is presented and described in terms of a simple model. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000183463400005 L2 - GESE2; GLASS SO - Optics Communications 2003 ;221(1-3):37-42 7974 UI - 5957 AU - Fernandez-Salas I AU - Contreras-Cordero C AU - Blitvich BJ AU - Gonzalez-Rojas JI AU - Cavazos-Alvarez A AU - Marlenee NL AU - Elizondo-Quiroga A AU - Lorono-Pino MA AU - Gubler DJ AU - Cropp BC AU - Calisher CH AU - Beaty BJ AD - Colorado State Univ, Coll Vet Med & Biomed Sci, Arthropod Borne & Infect Dis Lab, Dept Microbiol Immunol & Pathol, Ft Collins, CO 80523, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Nuevo Leon, MexicoCtr Dis Control & Prevent, Div Vector Borne Infect Dis, Ft Collins, CO, USABeaty, BJ, Colorado State Univ, Coll Vet Med & Biomed Sci, Arthropod Borne & Infect Dis Lab, Dept Microbiol Immunol & Pathol, Ft Collins, CO 80523 USA TI - Serologic evidence of West Nile virus infection in birds, Tamaulipas State, Mexico AB - Following the introduction of West Nile virus (WNV) into North America in 1999, surveillance for WNV in migratory and resident birds was established in Tamaulipas State, northern Mexico in December 2001. Overall, 796 birds representing 70 species and 10 orders were captured and assayed for antibodies to WNV. Nine birds had flavivirus-specific antibodies by epitope-blocking enzyme-linked immunosorbent assay; four were confirmed to have antibody to WNV by plaque reduction neutralization test. The WNV-infected birds were a house wren, mourning dove, verdin and Bewick's wren. The house wren is a migratory species; the other WNV-infected birds are presumably residents. The WNV-infected birds were all captured in March 2003. These data provide the first indirect evidence of WNV transmission among birds in northern Mexico MH - USA MH - Mexico|Nuevo Leon PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 14 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 1530-3667 UR - ISI:000220171800005 L2 - West Nile virus;flavivirus;Mexico;bird;surveillance;HORSES SO - Vector-Borne and Zoonotic Diseases 2003 ;3(4):209-213 7975 UI - 7469 AU - Fernandez AM AU - Turner JA AD - UNAM, CIE, Dept Mat Solares, Ctr Invest Energia, Temixco 62580, Morelos, MexicoNatl Renewable Energy Lab, Golden, CO 80401, USAFernandez, AM, UNAM, CIE, Dept Mat Solares, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Preparation and photocharacterization of Cu-Sb-Se films by electrodeposition technique AB - Ternary semiconductor Cu-Sb-Se films were grown on 304 stainless-steel/Cr and ITO-glass using a combination of electrodeposition and chemical bath techniques. The samples were annealed in a N-2 atmosphere at various temperatures and characterized by X-ray, electron probe microanalysis, current-voltage, capacitance-voltage and photocurrent spectroscopy. Photoelectrochemical studies were used to determinate the flat-band potential and the doping density of the material. These data lead to energetic considerations on the applicability of the Cu-Sb-Se electrode in the photoelectrochemical decomposition of water. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000185266300011 L2 - electrodeposition;ternary semiconductor;copper-antimony-selenide;SB2SE3 THIN-FILMS; CRYSTAL-STRUCTURE SO - Solar Energy Materials and Solar Cells 2003 ;79(3):391-399 7976 UI - 9134 AU - Fernandez DJ AU - Munoz R AU - Ramos A AD - CINVESTAV, Dipartimento Fis, Mexico City 07000, DF, MexicoUniv Padua, Dipartimento Matemat Pura & Applicata, I-35131 Padua, ItalyFernandez, DJ, CINVESTAV, Dipartimento Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Second order SUSY transformations with 'complex energies' AB - Second order supersymmetry transformations which involve a pair of complex conjugate factorization energies and lead to real nonsingular potentials are analyzed. The generation of complex potentials with real spectra is also studied. The theory is applied to the free particle, one-soliton well and one-dimensional harmonic oscillator. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000181001900003 L2 - second-order supersymmetry;irreducible intertwining operators;complex potentials with real spectra;generation of solvable potentials;QUANTUM-MECHANICS; DERIVATIVE SUPERSYMMETRY; DARBOUX TRANSFORMATIONS; FACTORIZATION METHOD; SHAPE INVARIANCE; POTENTIALS; HAMILTONIANS; OPERATORS; EQUATION; SPECTRA SO - Physics Letters A 2003 ;308(1):11-16 7977 UI - 8889 AU - Fernandez G AU - de la Cueva H AU - Warnock N AU - Lank DB AD - Simon Fraser Univ, Dept Sci Biol, Ctr Wildlife Ecol, Burnaby, BC V5A 1S6, CanadaCtr Invest Cientifica & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Nevada, Reno, NV 89512, USAFernandez, G, Simon Fraser Univ, Dept Sci Biol, Ctr Wildlife Ecol, Burnaby, BC V5A 1S6, Canada TI - Apparent survival rates of Western Sandpiper (Calidris mauri) wintering in northwest Baja California, Mexico AB - To estimate annual apparent local survival, we collected capture-resighting data on 256 individually marked male Western Sandpipers (Calidris mauri) wintering at Estero de Punta Banda, Mexico, between 1994-1997. A hierarchical modeling approach was used to address the effect of age class and year on survivorship rates. The best-fit model included a constant apparent survival probability (phi = 0.489; 95% Cl = 0.410-0.569), but several models fit nearly as well, and averaging among the top five, to account for model uncertainty, suggested that adults had somewhat higher values than juveniles (phi = 0.490 +/- 0.051 vs. 0.450 +/- 0.067). Detection probability was substantially higher for adults than for juveniles (p = 0.741 vs. p = 0.537). Those apparent survival estimates are low compared with those from other studies of Western Sandpipers at breeding and other nonbreeding locations, and substantially lower than the true survivorship rates expected for small sandpipers in general. We interpret these results as indicating that this site is of below average quality for nonbreeding male Western Sandpipers MH - Canada MH - Mexico|Baja California MH - USA PB - LAWRENCE: AMER ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 4 U4 - Ornithology U5 - J;Article AV - English IS - 0004-8038 UR - ISI:000181700500005 L2 - REDSHANK TRINGA-TOTANUS; RAPTOR PREDATION; MARKED ANIMALS; LONG-TERM; POPULATION; SHOREBIRDS; TRANSIENT; MIGRATION; FIDELITY; NUMBERS SO - Auk 2003 ;120(1):55-61 7978 UI - 7529 AU - Fernandez RCC AU - Diaz JAP AD - Univ Oviedo, Dept Comp Sci, Oviedo 33007, Asturias, SpainITESM, Elect & Commun Dept, Temixco 62589, Morelos, MexicoFernandez, RCC, Univ Oviedo, Dept Comp Sci, C Calvo Sotelo S-N, Oviedo 33007, Asturias, Spain TI - Mobile agents markup language AB - The aim of this paper is the definition of a data and instructions interchange language for mobile agents which belong to different mobile agents systems with the goal of allowing the information interchange between these applications and improving students learning in distributed environments MH - Mexico|Morelos MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000185074000008 SO - Web Engineering, Proceedings 2003 ;2722():54-57 7979 UI - 7876 AU - Ferrari AC AU - Rodil SE AU - Robertson J AU - Milne WI AD - Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandUNAM, Inst Invest Mat, Mexico City, DF, MexicoFerrari, AC, Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England TI - Is stress necessary to stabilise sp(3) bonding in diamond-like carbon (vol 11, pg 944, 2002) MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Correction AV - English IS - 0925-9635 UR - ISI:000184315100029 SO - Diamond and Related Materials 2003 ;12(8):1439-1439 7980 UI - 8474 AU - Ferrari AC AU - Rodil SE AU - Robertson J AD - Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandUniv Autonoma Mexico, Inst Invest & Mat, Mexico City 04510, DF, MexicoFerrari, AC, Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England TI - Resonant Raman spectra of amorphous carbon nitrides: the G peak dispersion AB - A general model is presented for the interpretation of the Raman spectra of amorphous carbon nitrides measured at any excitation energy. The Raman spectra can be explained in terms of an amorphous carbon based model, without need of extra peaks due to CN, NN or NH modes. We classify amorphous carbon nitride films in four classes, according to the corresponding N-free film: a-C:N, a-C:H:N, ta-C:H:N and ta-C:N. In all cases, a multi-wavelength Raman study allows a direct correlation of the Raman parameters with the N content, which is not generally possible for single wavelength excitation. The G peak dispersion emerges as a most informative parameter for Raman analysis. UV Raman enhances the sp(1) CN peak, which is usually too faint to be seen in visible excitation. (C) 2003 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 14 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0925-9635 UR - ISI:000182872000128 L2 - diamond-like carbon;carbon nitride;Raman spectroscopy;structure;DIAMOND-LIKE CARBON; THIN-FILMS; NITROGEN; SPECTROSCOPY SO - Diamond and Related Materials 2003 ;12(3-7):905-910 7981 UI - 8499 AU - Ferrari AC AU - Rodil SE AU - Robertson J AD - Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandNatl Autonomous Univ Mexico, Inst Invest Mat, Coyoacan 04510, DF, MexicoFerrari, AC, Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England TI - Interpretation of infrared and Raman spectra of amorphous carbon nitrides AB - A general framework for the interpretation of infrared and Raman spectra of amorphous carbon nitrides is presented. In the first part of this paper we examine the infrared spectra. The peaks around 1350 and 1550 cm(-1) found in the infrared spectrum of amorphous carbon nitride or hydrogenated and hydrogen-free amorphous carbon are shown to originate from the large dynamic charge of the more delocalized pi bonding which occurs in more sp(2) bonded networks. The IR absorption decreases strongly when the pi bonding becomes localized, as in tetrahedral amorphous carbon. Isotopic substitution is used to assign the modes to C=C skeleton modes, even those modes around 1600 cm(-1) which become strongly enhanced by the presence of hydrogen. The infrared spectrum of carbon nitride may resemble the Raman spectrum at some excitation energy, but the infrared activity does not primarily result from nitrogen breaking the symmetry. In the second part we examine the Raman spectra. A general model is presented for the interpretation of the Raman spectra of amorphous carbon nitrides measured at any excitation energy. The Raman spectra can be explained in terms of an amorphous carbon based model, without need of extra peaks due to CN, NN, or NH modes. We classify amorphous carbon nitride films in four classes, according to the corresponding N-free film: a-C:N, a-C:H:N, ta-C:H:N, and ta-C:N. We analyze a wide variety of samples for the four classes and present the Raman spectra as a function of N content, sp(3) content, and band gap. In all cases, a multiwavelength Raman study allows a direct correlation of the Raman parameters with the N content, which is not generally possible for single wavelength excitation. The G peak dispersion emerges as a most informative parameter for Raman analysis. UV Raman enhances the sp(1) CN peak, which is usually too faint to be seen in visible excitation. As for N-free samples, UV Raman also enhances the C-C sp(3) bonds vibrations, allowing the sp(3) content to be quantified MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 76 U4 - Physics, Condensed Matter U5 - J;Review AV - English IS - 1098-0121 UR - ISI:000182741400055 L2 - FILTERED CATHODIC VACUUM; DIAMOND-LIKE CARBON; BEAM-ASSISTED-DEPOSITION; ENERGY-LOSS SPECTROSCOPY; PULSED-LASER DEPOSITION; X-RAY-DIFFRACTION; CNX THIN-FILMS; ION-BEAM; VIBRATIONAL PROPERTIES; MECHANICAL-PROPERTIES SO - Physical Review B 2003 ;67(15): 7982 UI - 9244 AU - Ferrer SJ AU - Granados SG AU - Bedioui F AU - Ordaz AA AD - Inst Invest Cientif, Guanajuato 36040, Gto, MexicoENSCP, Lab Electrchim & Chim Analyt, F-75005 Paris, FranceOrdaz, AA, Inst Invest Cientif, Cerro Venada S-N,Pueblito Rocha, Guanajuato 36040, Gto, Mexico TI - Amperometric detection of urea in aqueous solution by poly(Ni-cyclam) film-modified glassy carbon electrode MH - France MH - Mexico|Guanajuato PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Electrochemistry U5 - J;Article AV - English IS - 1040-0397 UR - ISI:000180857000009 L2 - NICKEL TETRAAZAMACROCYCLIC COMPLEXES; FLOW-INJECTION SYSTEM; ELECTROCATALYTIC OXIDATION; BIOSENSOR; ALCOHOLS; SAMPLES; SERUM SO - Electroanalysis 2003 ;15(1):70-73 7983 UI - 6788 AU - Ferris DG AU - Litaker MS AU - Gilman PA AU - Lopez AGL AD - Med Coll Georgia, Gynecol Canc Prevent Ctr, Augusta, GA 30912, USAMed Coll Georgia, Dept Family Med, Augusta, GA 30912, USAMed Coll Georgia, Dept Obstet & Gynecol, Augusta, GA 30912, USAMed Coll Georgia, Off Biostat & Bioinformat, Augusta, GA 30912, USAMed Coll Georgia, Dept Psychiat & Hlth Behav, Augusta, GA 30912, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoFerris, DG, Med Coll Georgia, Gynecol Canc Prevent Ctr, 1423 Harper St,HH-105, Augusta, GA 30912 USA TI - Patient acceptance and the psychological effects of women experiencing telecolposcopy and colposcopy AB - Background: The purpose of the study was to assess patient acceptance and psychological effects in women experiencing telecolposcopy compared with colposcopy. Methods: Convenience samples of 150 and 263 women scheduled for colposcopy or telecolposcopy, respectively, completed questionnaires assessing anxiety (Prime MD), depression [Center for Epidemiologic Studies/Depressed Mood Scale (CES-D)], health beliefs and concerns, coping style (Miller Behavioral Style Score) and examination acceptance and satisfaction. Test scores and subject responses were compared using the t test and Wilcoxon rank sum test. Results: Mean scores representing mild anxiety (1.3 and 1.2, P = .7) and mild depression (35.4 and 36.3, P = .4) were reported for the telecolposcopy and colposcopy groups, respectively. The telecolposcopy group indicated significantly greater mean scores for the examination, saving them time and money compared with the colposcopy group. Women in both groups were highly satisfied with their examinations and care. Conclusions: In general, women reported very high levels of satisfaction with telecolposcopy and colposcopy. Potential savings of time and money and improved health care were considered of particular value to women examined by telecolposcopy. Telecolposcopy seems to be well accepted by rural women MH - USA MH - Mexico|Morelos PB - LEXINGTON: AMER BOARD FAMILY PRACTICE RP - NOT IN FILE U3 - TC 2 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0893-8652 UR - ISI:000186909000006 L2 - ABNORMAL CERVICAL SMEAR; EMOTIONAL-REACTIONS; PRIMARY-CARE; ANXIETY; NEOPLASIA; TRIAL SO - Journal of the American Board of Family Practice 2003 ;16(5):405-411 7984 UI - 7683 AU - Ferro-Flores G AU - de Murphy CA AU - Pedraza-Lopez M AU - Melendez-Alafort L AU - Zhang YM AU - Rusckowski M AU - Hnatowich DJ AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Autonoma Estado Mexico, Mexico City, DF, MexicoUniv Massachusetts, Sch Med, Amherst, MA 01003, USAFerro-Flores, G, Inst Nacl Invest Nucl, Mexico City 11801, DF, Mexico TI - In vitro and in vivo assessment of Tc-99m-UBI specificity for bacteria AB - Technetium-99m labeled ubiquicidin peptide 29-41 (Tc-99m-UBI) is a cationic human antimicrobial peptide fragment that has been shown to bind bacteria in vitro and accumulates at sites of infection in experimental animals. To help determine if Tc-99m-UBI is bound to the bacterial cell envelope by a simple nonspecific electrostatic interaction, a comparative study of the in vitro binding of Tc-99m-UBI and two different Tc-99m labeled cationic peptides (Tc-99m-Tat-1-Scr and Tc-99m-Tat-2-Scr) to bacteria and to two tumor cell line (LS174T and ACHN) was performed. The in vivo specificity of Tc-99m-UBI for infection in mice was also evaluated using dual labels in the same animal and comparing the target/non-target ratio for Ga-67-citrate and Tc-99m-UBI at sites of induced infection and sterile inflammation. Under conditions of this study, the in vitro binding of Tc-99m-UBI, Tc-99m-Tat-1-Scr and Tc-99m-Tat-2-Scr to S. aureus was 35, 78 and 87% respectively. While the binding of Tc-99m-Tat-1-Scr and Tc-99m-Tat-2-Scr was 37 and 33% to colon tumor cells (LS174T) and 39 and 41% to renal tumor cells (ACHN) respectively, the binding of Tc-99m-UBI to both cell types was much lower at less than 4%. In vivo studies revealed that there is a significant difference (p < 0.05) in the radioactive accumulation of Tc-99m-UBI between the sites of infection and inflammation compared to Ga-67-citrate. Thus, Tc-99m-UBI showed an average infection/inflammation ratio of 2.08 &PLUSMN; 0.49 compared to 1.14 &PLUSMN; 0.45 for Ga-67-citrate. In conclusion, the in vitro and in vivo results provide evidence that a specific mechanism is responsible of the Tc-99m-UBI bacterial intracellular accumulation. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 11 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8051 UR - ISI:000184723200004 L2 - ubiquicidine;UBI;Tc-99m-UBI specificity;cationic antimicrobial peptides;CATIONIC PEPTIDES; ANTIMICROBIAL PEPTIDES; INFECTIONS; MECHANISM SO - Nuclear Medicine and Biology 2003 ;30(6):597-603 7985 UI - 7522 AU - Ferro AA AU - Giridhar S AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoIndian Inst Astrophys, Bangalore 560034, Karnataka, IndiaFerro, AA, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - HD 34700: A new T Tauri double-lined spectroscopic binary AB - We find the star HD 34700 to be a double-lined spectroscopic binary. We also identify it as a weak-line T Tauri object. The spectra of both components are very similar and both show the Li I feature at 6708 Angstrom. Strong arguments in favour of the binary nature of the star as opposed to other possibilities are offered. It is very likely that the companion is also a T Tauri star of similar mass. A projected rotational velocity, v sin i, of 25 and 23 km s(-1) has been estimated for the blue and red components. We present a list of the lines identified and the radial velocities of the two components on three spectra obtained on consecutive nights MH - India MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000185212600005 L2 - spectroscopic binaries;T Tauri stars;ROTATIONAL VELOCITIES; VEGA-TYPE; STARS; EXPORT SO - Astronomy & Astrophysics 2003 ;408(3):L29-L32 7986 UI - 7426 AU - Fetter H AU - de Buen BG AU - Garcia-Falset J AD - CIMAT, Guanajuato 36000, Gto, MexicoUniv Valencia, Fac Matemat, Dept Anal Matemat, E-46100 Valencia, SpainFetter, H, CIMAT, Apdo Postal 402, Guanajuato 36000, Gto, Mexico TI - Banach spaces which are somewhat uniformly noncreasy AB - We consider a family of spaces wider than r-UNC spaces and we give some fixed point results in the setting of these spaces. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000185398300008 L2 - FIXED-POINT PROPERTY; MAPPINGS SO - Journal of Mathematical Analysis and Applications 2003 ;285(2):444-455 7987 UI - 7719 AU - Fiddy SG AU - Ogden JS AU - Petranovskii VP AD - Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, EnglandEuropean Synchrotron Radiat Facil, F-38043 Grenoble, FranceUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoFiddy, SG, Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England TI - EXAFS and optical spectroscopy characterisation of reduction products of binary silver-copper ion mixture in mordenite AB - Ag+, Cu2+ and Ag+-Cu2+ binary mixtures with different Ag/Cu ratios were supported on mordenite with Si/Al ratio equal to 10 and reduced in the temperature range 323-673 K. Diffuse Reflectance UV-Visible spectra reveal appearance of Ag-8 clusters and small copper metal particles. Cu K-edge EXAFS show for Cu-rich non-reduced samples the presence of only oxygen shell; but for the Ag-rich sample, the presence of heavier backscatterer is also indicated producing a different EXAFS envelope. Silver EXAFS analysis suggests that, for the reduced samples, there are both Ag - 0 and Ag - Ag distances (Ag - Ag and Ag - O coordination numbers of approx 2 and of 1.3 respectively for the Ag/Cu = 3:1. and 1:3 samples). Importantly. for the reduced sample, the EXAFS indicates that Ag appears to promote/stabilise Cu cluster formation whereas Cu appears to impede/destabilise Ag cluster formation MH - United Kingdom MH - France MH - Mexico|Baja California PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000184687800058 L2 - SIO2/AL2O3 MOLAR RATIO; AG-CU; DIESEL-ENGINES; CLUSTERS; NANOPARTICLES; ABSORPTION; CATALYSTS; ZEOLITES; EXHAUST; NO SO - European Physical Journal D 2003 ;24(1-3):253-256 7988 UI - 7848 AU - Figueira ELZ AU - Hirooka EY AU - Mendiola-Olaya E AU - Blanco-Labra A AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Irapuato, Gto, MexicoUniv Estadual Londrinia, BR-86051990 Londrina, PR, BrazilBlanco-Labra, A, IPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Apdo Postal 629, Irapuato, Gto, Mexico TI - Characterization of a hydrophobic amylase inhibitor from corn (Zea mays) seeds with activity against amylase from Fusarium verticillioides AB - A hydrophobic 19.7-kDa amylase inhibitor (Al) was purified from corn kernels by 95% ethanol extraction and anionic exchange chromatography. The Al has an isoelectric point of 3.6 and was very stable at different pH values and high temperatures, maintaining 47.6% activity after heating to 94degreesC for 60 min. Amino acid analysis indicated high valine. leucine. glycine. alanine, and glutamic acid/glutamine content, and especially high valine content (41.2 mol%). This inhibitor is not a glycoprotein. It required 30-min preincubation to maximize complex enzyme-inhibitor formation when the amylase from Fusarium verticillioides was tested. The optimal pH of interaction was 6.5. It showed broad-spectrum activity including the following amylases: human saliva, porcine pancreas, E verticillioides, as well as those from some insects of agricultural importance (Acanthoscelides obtectus, Zabrotes subfasciatus. Sitophilus zeamais, and Prostephanus truncatus). This novel hydrophobic protein not only inhibited the amylase from E verticillioides but also decreased the conidia germination. Thus, this protein represents an approach to decrease the production of fumonisin in corn, either by using it as a molecular marker to detect fungal resistance or through genetic engineering MH - Brazil MH - Mexico|Guanajuato PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000184299400002 L2 - DISULFIDE BONDS; PROTEINS; MAIZE; RESISTANCE; ACID SO - Phytopathology 2003 ;93(8):917-922 7989 UI - 9072 AU - Figueira ELZ AU - Blanco-Labra A AU - Gerage AC AU - Ono EYS AU - Mendiola-Olaya E AU - Ueno Y AU - Hirooka EY AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Irapuato 36500, Guanajuato, MexicoUniv Estadual Londrina, BR-86051990 Londrina, PR, BrazilUniv Estadual Londrina, BR-86051990 Londrina, PR, BrazilIPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Irapuato 36500, Guanajuato, MexicoYashio Inst Environm Sci, Shinjuku Ku, Tokyo 1620812, JapanUniv Estadual Londrina, BR-86051990 Londrina, PR, BrazilBlanco-Labra, A, IPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Apdo Postal 629, Irapuato 36500, Guanajuato, Mexico TI - New amylase inhibitor present in corn seeds active in vitro against amylase from Fusarium verticillioides AB - A screening for specific amylase inhibitor levels against amylase from Fusarium verticillioides (Fusarium mondiforme), the most relevant mycotoxigenic fungus in corn, was conducted on 37 corn hybrids. The amylase inhibitor levels in these hybrids ranged from 5.5 to 16.0 amylase inhibitor units per gram of corn (AIU/g) in the MASTER and AG5011 hybrids, respectively. The hybrid with the maximum content of inhibitor was used as the source of this new protein. The inhibitor was partially purified using fractional precipitation, gel filtration on Sephadex G75 column, high performance liquid chromatography (HPLC) Superose HR 10130 column, and HPLC anion exchange chromatography, obtaining a 20.7-fold purification. Electrophoresis after denaturing and beating under reductive conditions showed an apparent 23.8 kDa molecular mass and an acidic isoelectric point of 5.4, which differs from previous molecular masses reported for other inhibitors present in corn seeds (14 and 22 kDa). This inhibitor showed activity against amylases from human saliva and pancreas, from the fungi E verticithoides and Aspergillus flavus, and from the insects Acanthoscelides obteclus, Zabrotes subfasciatus, Tribolitan castaneum, and Sitotroga cerealella. The mycoflora found in the corn grain indicated Fusarium sp. as the most prevalent fungi (81.1% of the samples), with a count ranging from 1.5 x 10(2) to 2.4 x 10(6) CFU/g of corn. The presence of fumonisms was detected in 21 out of the 37 hybrids studied, ranging from 0.05 to 2.67 mug of FB per gram of corn. No correlation could be established between this amylase inhibitor level in the corn seeds and the presence of Fusarium sp. or with the fumonisin content under the experimental conditions of the test MH - Brazil MH - Japan MH - Mexico|Guanajuato PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000181188500004 L2 - ASPERGILLUS-FLAVUS; ALPHA-AMYLASE; FUMONISIN CONTAMINATION; NATURAL OCCURRENCE; TRYPSIN-INHIBITOR; MAIZE SEEDS; PROTEIN; MONILIFORME; ZEARALENONE; MYCOTOXINS SO - Plant Disease 2003 ;87(3):233-240 7990 UI - 4221 AU - Figueroa-De La Rosa J AU - Valerio AA AU - Lopez-Martinez V AU - Whitfield JB AU - Sharkey MJ AD - Colegio Postgrad, Montecillo 56230, MexicoUniv Illinois, Dept Entomol, Urbana, IL 62801, USAUniv Kentucky, Dept Entomol, Lexington, KY 40546, USACent Amer Inst Biol Res & Conservat CIBRC, San Jose, Costa RicaUniv Autonoma Morelos, Fac Ciencias Agropecuarias, Cuernavaca 62210, Morelos, MexicoFigueroa-De La Rosa, JI, Colegio Postgrad, Kilometro 36-5 Carretera Mexico Texcoco,, Montecillo 56230, Mexico TI - Two new species of Epsilogaster Whitfield & Mason (Hymenoptera : Braconidae) from Mexico and Costa Rica AB - Epsilogaster williami new species from Mexico, and Epsilogaster antoniae new species (Hymenoptera: Braconidae) from Costa Rica are described with illustrations of wing venation, head, mesosoma, and metasomal segments. A key is provided for the nine known species of Epsilogaster Whitfield & Mason, a recently described genus of the rarely collected subfamily Mendesellinae MH - Costa Rica MH - Mexico|Estado De Mexico MH - Mexico|Morelos MH - USA PB - SAN FRANCISCO: PACIFIC COAST ENTOMOL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0031-0603 UR - ISI:000224180900007 L2 - Insecta;Braconidae;Mendesellinae;Epsilogaster;taxonomy;new species;new world SO - Pan-Pacific Entomologist 2003 ;79(3-4):198-206 7991 UI - 9280 AU - Figueroa FL AU - Escassi L AU - Perez-Rodriguez E AU - Korbee N AU - Giles AD AU - Johnsen G AD - Univ Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, SpainCICESE, Dept Ecol, Ensenada, Baja California, MexicoNorwegian Univ Sci & Technol, Trondheim Biol Stn, N-7018 Trondheim, NorwayFigueroa, FL, Univ Malaga, Fac Ciencias, Dept Ecol, Campus Teatinos S-N, E-29071 Malaga, Spain TI - Effects of short-term irradiation on photoinhibition and accumulation of mycosporine-like amino acids in sun and shade species of the red algal genus Porphyra AB - The effect of irradiance (40 and 840 mumol photons m(-2) s(-1)) of short-term (48 h) irradiation on photosynthetic activity (estimated as oxygen evolution and as chlorophyll fluorescence), specific absorption and fluorescence excitation spectra, photosynthetic pigment accumulation (chlorophyll a and biliproteins) and UV-absorbing compounds (mycosporine-like amino acids, MAAs) was investigated in sun and shade species of the red algal genus Porphyra collected in Trondheimsfjord (Norway). In the sun type, high irradiance exposure (840 mumol photons m(-2) s(-1)) did not alter the Chl a concentration, however, exposure to a lower irradiance (40 mumol photons m(-2) s(-1)) for 48 h significantly increased the chlorophyll concentration. The content of MAAs was significantly higher in the suntype than in the shade type algae. Porphyra-334 is the main MAA in this species followed by shinorine. The total content of MAAs significantly (P<0.05) increased in the sun type after 48 It exposure to both high and low irradiances. However, in the shade type, porphyra-334 significantly decreased (P<0.05) after both high and low irradiance exposure. Photosynthetic activity (as oxygen evolution) and the optimal quantum yield (F-nu/F-m), as an indicator of photoinhibition, decreased under low and high irradiance in the shade type algae and no full recovery was observed when the algae were transferred to very low irradiation. The sun type algae presented a higher capacity of acclimation to increased irradiance than the shade type algae. This high acclimation of sun type algae to short term high irradiance exposure (48 h) is explained by the higher thermal dissipation. This was estimated as the ratio of nonphotochemical quenching related to the light dose (q(N):dose) and by the accumulation of MAAs. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Norway MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 1011-1344 UR - ISI:000180813400004 L2 - chlorophyll fluorescence;irradiance;mycosporine-like amino acids;photoinhibition;photosynthetic pigments;Porphyra;ULTRA-VIOLET RADIATION; CHLOROPHYLL FLUORESCENCE; SOLAR-RADIATION; PHOTOSYSTEM-II; SOUTHERN SPAIN; ULVA-ROTUNDATA; UV-RADIATION; IN-VIVO; PHOTOADAPTIVE RESPONSES; ULTRAVIOLET-RADIATION SO - Journal of Photochemistry and Photobiology B-Biology 2003 ;69(1):21-30 7992 UI - 9317 AU - Finger PT AU - Marin JP AU - Berson AM AU - Kedhar S AU - McCormick SA AD - New York Eye Canc Ctr, New York, NY 10021, USAClin Oftalmol Anzures, Mexico City, DF, MexicoSt Vincents Comprehens Canc Ctr, New York, NY, USANew York Eye & Ear Infirm, New York, NY 10003, USANYU, Sch Med, New York, NY, USAFinger, PT, New York Eye Canc Ctr, 115 E 61 St, New York, NY 10021, USA TI - Choroidal metastasis from adenoid cystic carcinoma of the lung AB - PURPOSE: We report a case of a choroidal metastasis from an adenoid cystic carcinoma of the lung. DESIGN: Interventional case report. METHODS: A 40-year old man, 9 months' status postresection of a bronchial adenoid cystic carcinoma, was diagnosed by clinical evaluation and fine,needle aspiration biopsy and treated with palladium-103 ophthalmic plaque brachytherapy. RESULTS: This unusual patient with uveal metastasis from adenoid cystic carcinoma presented with decreased vision in the right eye and a diaphanous amelanotic choroidal tumor in the superotemporal macula. Ultrasound revealed a dome-shaped tumor that measured 4.0 mm in apical height and 11 X 10 mm in basal diameter. Fluorescein angiography revealed a double circulation and late intense subretinal fluorescence. Plaque brachy-therapy provided local control and preservation of the eye. CONCLUSION: Bronchogenic adenoid cystic carcinoma can metastasize to the choroid. (C) 2003 by Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000180709400025 L2 - GLAND SO - American Journal of Ophthalmology 2003 ;135(2):239-241 7993 UI - 8650 AU - Fisher CT AU - Pollard HP AU - Israde-Alcantara I AU - Garduno-Monroy VH AU - Banerjee SK AD - Kent State Univ, Dept Anthropol, Kent, OH 44242, USAMichigan State Univ, Dept Anthropol, E Lansing, MI 48824, USAUniv Michoacana San Nicolas Hidalgo, Inst Invest Met, Morelia 58000, Michoacan, MexicoUniv Minnesota, Inst Rock Magnet, Minneapolis, MN 55455, USAUniv Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455, USAFisher, CT, Kent State Univ, Dept Anthropol, Kent, OH 44242, USA TI - A reexamination of human-induced environmental change within the Lake Patzcuaro Basin, Michoacan, Mexico AB - This paper presents 2,000 years of settlement and land use within the Lake Patzcuaro Basin, Mexico. Three findings challenge the conclusions of previous research. We show (i) that initial land degradation was caused by settlement, not by agriculture; (it) that population density inversely correlates with erosion; and (M) that land degradation was associated with European Conquest but not from the introduction of the Euro-agro suite. Instead, demographic collapse caused by European-introduced disease prevented human-generated landscapes from being maintained, resulting in widespread degradation. These findings support the use of indigenous landscape technology for modern conservation if past failings can be resolved MH - Mexico|Michoacan MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 21 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000182306100109 L2 - SOIL-EROSION; ARCHAEOLOGY; LANDSCAPE; AMERICA; HISTORY; CIVILIZATION; AGRICULTURE; ECOSYSTEMS; ECOLOGY; REGION SO - Proceedings of the National Academy of Sciences of the United States of America 2003 ;100(8):4957-4962 7994 UI - 9283 AU - Fitzgerald JC AU - Gao GP AU - Reyes-Sandoval A AU - Pavlakis GN AU - Xiang ZQ AU - Wlazlo AP AU - Giles-Davis W AU - Wilson JM AU - Ertl HCJ AD - Wistar Inst Anat & Biol, Philadelphia, PA 19104, USAUniv Penn, Philadelphia, PA 19104, USANCI, Ctr Canc Res, Frederick, MD 21701, USAInst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City, DF, MexicoErtl, HCJ, Wistar Inst Anat & Biol, 3601 Spruce St, Philadelphia, PA 19104 USA TI - A simian replication-defective vaccine to HIV-1 gag AB - In animal models, El-deleted human adenoviral recombinants of the serotype 5 (AdHu5) have shown high efficacy as vaccine carriers for different Ags including those of HIV-1. Humans are infected by common serotypes of human adenovirus such as AdHu5 early in life and a significant percentage has high levels of neutralizing Abs to these serotypes, which will very likely impair the efficacy of recombinant vaccines based on the homologous virus. To circumvent this problem, a novel replication-defective adenoviral vaccine carrier based on an El-deleted recombinant of the chimpanzee adenovirus 68 (AdC68) was developed. An AdC68 construct expressing a codon-optimized, truncated form of gag of HIV-1 induces CD8(+) T cells to gag in mice which at the height of the immune response encompass nearly 20% of the entire splenic CD8(+) T cell population. The vaccine-induced immune response provides protection to challenge with a vaccinia gag recombinant virus. Induction of transgene-specific CD8(+) T cells and protection against viral challenge elicited by the AdC68 vaccines is not strongly inhibited in animals preimmune to AdHu5 virus. However, the response elicited by the AdHu5 vaccine is greatly attenuated in AdHu5 preimmune animals MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 68 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000180655500036 L2 - T-LYMPHOCYTE RESPONSES; IMMUNE-RESPONSES; RHESUS-MONKEYS; RECOMBINANT ADENOVIRUS; DNA VACCINES; VIRUS; IMMUNODEFICIENCY; INFECTION; CELLS; PREVENTION SO - Journal of Immunology 2003 ;170(3):1416-1422 7995 UI - 8628 AU - Fleming WH AU - Hernandez-Hernandez D AD - Brown Univ, Div Appl Math, Providence, RI 02912, USACtr Invest Math, Guanajuato 36000, MexicoFleming, WH, Brown Univ, Div Appl Math, Providence, RI 02912, USA TI - An optimal consumption model with stochastic volatility AB - We consider an optimal consumption and investment model in continuous time, which is an extension of the original Merton's problem. In the proposed model, the asset prices are affected by correlated economic factors, modelled as diffusion processes. Writing the value function in a special form, it can be seen that another optimal control problem is involved and studying its associated HJB equation smoothness properties of the original value function can be derived as well as optimal policies MH - Mexico|Guanajuato MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 12 U4 - Mathematics, Interdisciplinary Applications;Social Sciences, Mathematical Methods;Statistics & Probability U5 - J;Article AV - English IS - 0949-2984 UR - ISI:000182483300006 L2 - stochastic volatility;portfolio optimization;factor modelling;mean reverting;RISK-SENSITIVE CONTROL; MANAGEMENT; UTILITY SO - Finance and Stochastics 2003 ;7(2):245-262 7996 UI - 4671 AU - Fleury A AU - Hernandez M AU - Fragoso G AU - Parkhouse RME AU - Harrison LJS AU - Sciutto E AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoInst Epidemiol Neurol & Neurol Trop, Limoges, FranceGulbenkian Inst Sci, P-2780156 Oeiras, PortugalUniv Edinburgh, Dept Trop Anim Hlth, Sir Alexander Robertson Ctr Trop Vet Med, Easter Bush Vet Ctr, Roslin EH25 9RG, Midlothian, ScotlandSciutto, E, Natl Autonomous Univ Mexico, Inst Invest Biomed, AP 70228, Mexico City 04510, DF, Mexico TI - Detection of secreted cysticercal antigen: a useful tool in the diagnosis of inflammatory neurocysticercosis AB - Neurocysticercosis is a common parasitic disease of the human central nervous system. It is particularly prevalent in developing countries, where it has a serious public health and economic impact. A major diagnostic problem with neurocysticercosis is its pleomorphic nature. Conventional diagnosis of neurocysticercosis still requires brain-computed tomography and/or magnetic resonance imaging, which are definitive but often prohibitively expensive and inaccessible in endemic areas. Herein, the monoclonal antibody HP 10 antigen-trapping enzyme-linked immunosorbent assay, which has been used successfully to detect viable Taenia solium cysticercosis, was evaluated using cerebrospinal fluid (CSF) from Mexican neurocysticercosis patients with various defined pathologies. Sensitivity was higher in cases of inflammatory compared with non-inflammatory disease (94.1% vs. 33.3%) and in cases of multiple-compared with single-cyst cysticercosis (85% vs. 33.3%). Positivity was a strong indicator of active, inflammatory, multiple-cyst neurocysticercosis detecting 100% (15/15) of such cases. The overall specificity, as determined using CSF samples from patients with other neurological symptoms, was 97.7% (42/43). Since the assay only detects viable infection, it is of known value in the follow-up of treated patients to determine whether treatment has been successful. Thus, antigen detection may be of particular value in the assessment of symptomatic patients, who may potentially benefit from rapid treatment MH - France MH - Mexico|Distrito Federal MH - Portugal MH - United Kingdom PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 9 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000223176500015 L2 - neurocysticercosis;Taenia solium;immunodiagnosis;antigen detection;enzyme-linked immunosorbent assay;Mexico;LARVAL TAENIA-SOLIUM; CEREBROSPINAL-FLUID; DEVELOPING-COUNTRIES; PARASITE PRODUCTS; ELISA; CRASSICEPS; ANTIBODIES; DISEASE; ASSAY; SERUM SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2003 ;97(5):542-546 7997 UI - 6826 AU - Fleury A AU - Beltran C AU - Ferrer E AU - Garate T AU - Harrison LJS AU - Parkhouse RME AU - Garcia E AU - Fragoso G AU - Costa-Cruz J AU - Biondi G AU - Agapejev S AU - Sciutto E AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirurg, Mexico City 14269, DF, MexicoInst Epidemiol Neurol & Neurol Trop, Limoges, FranceInst Salud Carlos III, Madrid 28220, SpainUniv Edinburgh, Dept Trop Anim Hlth, Sir Alexander Robertson Ctr Trop Vet Med, Easter Bush Vet Ctr, Roslin EH25 9RG, Midlothian, ScotlandInst Gulbenkian Ciencias, Oeiras, PortugalUniv Fed Uberlandia, Parasitol Lab, BR-3840090Z Uberlandia, MG, BrazilUniv Estadual Paulista, Fac Med Vet & Zootecn, BR-18618000 Botucatu, SP, BrazilUniv Estadual Paulista, Fac Med, BR-18618000 Botucatu, SP, BrazilSciutto, E, Univ Nacl Autonoma Mexico, Inst Invest Biomed, AP 70228, Mexico City 04510, DF, Mexico TI - Application of synthetic peptides to the diagnosis of neurocysticercosis AB - We tested the possible diagnostic utility of five Taenia saginata oncosphere-derived synthetic peptides in T. solium neurocysticercosis (NC). The five peptides correspond to protein sequences with high antigenic indexes that were cloned from a T. saginata oncosphere cDNA library. The test samples consisted of cerebrospinal fluid (CSF) samples randomly collected from patients referred from Mexican and Brazilian neurological institutes. Indirect enzyme-linked immunosorbent assays (ELISA) were carried out with the peptides either unconjugated or coupled to carrier proteins, and were compared with results obtained using T. solium cyst fluid as a positive control. For active inflammatory NC, the higher sensibility (93%) and specificity (85%) was obtained with peptides HP6-2 and Ts45W-1, respectively, coupled to ovalbumin, in both Mexican and Brazilian patients. Examining the results of the individual peptide assays in combination, in some instances, improved the sensitivity to 100% MH - Brazil MH - France MH - Mexico|Distrito Federal MH - Portugal MH - United Kingdom MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 1360-2276 UR - ISI:000186877600012 L2 - peptides;Taenia solium;neurocysticercosis;diagnosis;LINKED-IMMUNOSORBENT-ASSAY; TAENIA-SAGINATA; HUMAN CYSTICERCOSIS; SECRETED ANTIGEN; ONCOSPHERES; CRASSICEPS; DISEASE; SOLIUM SO - Tropical Medicine & International Health 2003 ;8(12):1124-1130 7998 UI - 8858 AU - Fleury A AU - Gomez T AU - Alvarez I AU - Meza D AU - Huerta M AU - Chavarria A AU - Mezo RAC AU - Lloyd C AU - Dessein A AU - Preux PM AU - Dumas M AU - Larralde C AU - Sciutto E AU - Fragoso G AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirugia Manuel Velazco Su, Mexico City, DF, MexicoINSERM, F-13258 Marseille, FranceInst Epidemiol Neurol & Neurol Trop, Limoges, FranceBUAP, Puebla, MexicoHosp Gen Puebla, Puebla, MexicoFragoso, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Apartado Postal 70228, Mexico City 04510, DF, Mexico TI - High prevalence of calcified silent neurocysticercosis in a rural village of Mexico AB - Human neurocysticercosis (NC) is a parasitic disease caused by Taenia solium when its larvae lodge in the central nervous system. NC prevalence estimates are obscured by the variable and often asymptomatic clinical picture. While infection depends on exposure, severity is possibly related with various host factors (immunity, genes and gender). This epidemiological study of cranial CT scans in an endemic rural community found that 9.1% of apparently healthy subjects had calcified lesions and were completely asymptomatic. Silent NC cases did not correlate with the exposure factors tested but showed family aggregation and higher rates of positive serology. Thus, NC prevalence may be higher than currently considered and host-related factors appear to be involved in infection and pathogenesis. Copyright (C) 2003 S. Karger AG, Basel MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 27 U4 - Public, Environmental & Occupational Health;Clinical Neurology U5 - J;Article AV - English IS - 0251-5350 UR - ISI:000181695400007 L2 - neurocysticercosis;epidemiology;CT scan;Taenia solium;cysticercosis;TAENIA-SOLIUM TAENIASIS; PARENCHYMAL BRAIN CYSTICERCOSIS; CRASSICEPS CYSTICERCOSIS; SUSCEPTIBILITY; PIGS; HUMANS; HOST; AGE SO - Neuroepidemiology 2003 ;22(2):139-145 7999 UI - 8852 AU - Flier WG AU - Grunwald NJ AU - Kroon LPNM AU - Sturbaum AK AU - van den Bosch TBM AU - Garay-Serrano E AU - Lozoya-Saldana H AU - Fry WE AU - Turkensteen LJ AD - Plant Res Int, Wageningen, NetherlandsUSDA ARS, Prosser, WA 99350, USACEEM PICTIPAPA, Potato Late Blight Project, Izcalli Cuauhtemoc, Edo De Mexico, MexicoUniv Autonoma Chapino, Dept Fitotecn, Chapino, Edo De Mexico, MexicoCornell Univ, Dept Plant Pathol, Ithaca, NY 14853, USAFlier, WG, Plant Res Int, Droevendaalsesteeg 1, Wageningen, Netherlands TI - The population structure of Phytophthora infestans from the Toluca Valley of central Mexico suggests genetic differentiation between populations from cultivated potato and wild Solanum spp AB - The Population structure of Phytophthora infestans in the Toluca Valley of central Mexico was assessed using 170 isolates collected front cultivated potatoes and the native wild Solanum spp., S. demissum and S. xedinense. All isolates were analyzed for mitochondrial DNA (mtDNA) haplotype and amplified fragment length polymorphism (AFLP) multi-locus fingerprint genotype. Isolate samples were monomorphic for mtDNA haplotype because all isolates tested were of the la haplotype. A total of 158 multilocus AFLP genotypes were identified among the 170 P. infestans isolates included in this study. P. infestans populations sampled in the Toluca Valley in 1997 were highly variable and almost every single isolate represented a unique genotype based on the analysis of 165 AFLP marker loci. Populations of P infestans collected from the commercial potato-growing region in the valley, the subsistence potato production area along the slopes of the Nevado de Toluca, and the native Solanum spp. on the forested slopes of the volcano showed a high degree of genetic diversity. The number of polymorphic loci varied from 20.0 to 62.4% for isolates collected from the field station and wild Solanum spp. On average, 81.8% (135) of the AFLP loci were polymorphic. Heterozygosity varied between 7.7 and 19.4%. Significant differentiation was found at the population level between strains originating from cultivated potatoes and wild Solanum spp. (P = 0.001 to 0.022). Private alleles were observed in individual isolates collected from all three populations, with numbers of unique dominant alleles varying from 9 to 16 for isolates collected from commercial potato crops and native Solanum spp.. respectively. Four AFLP markets were exclusively found present in isolates collected from S. demissum. Indirect estimation of gene flow between populations indicated restricted gene flow between both P. infestans populations front cultivated potatoes and wild Solanum hosts. There was no evidence found for the presence of substructuring at the subpopulation (field) level. We hypothesize that population differentiation and genetic isolation of P infestans in the Toluca Valley is driven by host-specific factors (i.e., R-genes) widely distributed in wild Solanum spp. and random genetic drift MH - Mexico|Estado De Mexico MH - Netherlands MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000181759400003 L2 - NEVADO-DE-TOLUCA; WESTERN SLOPES; MONT DEBARY; SYMPATRIC SPECIATION; PCR AMPLIFICATION; FLOW; DIVERSITY; MARKERS; FITNESS SO - Phytopathology 2003 ;93(4):382-390 8000 UI - 9299 AU - Fliess M AU - Sira-Ramirez H AD - Ecole Normale Super, Ctr Math & Leurs Applicat, F-94235 Cachan, FranceEcole Polytech, Lab GAGE, F-91128 Palaiseau, FranceCINVESTAV, IPN, Dept Ingn Elect, Mexico City 07300, DF, MexicoFliess, M, Ecole Normale Super, Ctr Math & Leurs Applicat, 61 Ave President Wilson, F-94235 Cachan, France TI - An algebraic framework for linear identification AB - A closed loop parametrical identification procedure for continuous-time constant linear systems is introduced. This approach which exhibits good robustness properties with respect to a large variety of additive perturbations is based on the following mathematical tools: 1. module theory; 2. differential algebra; 3. operational calculus. Several concrete case-studies with computer simulations demonstrate the efficiency of our on-line identification scheme MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 18 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 1262-3377 UR - ISI:000180638800001 L2 - linear systems;identifiability;parametric identification;adaptive control;generalised proportional-integral controllers;module theory;differential algebra;operational calculus;TIME SO - Esaim-Control Optimisation and Calculus of Variations 2003 ;9(9):151-168 8001 UI - 8229 AU - Flisser A AU - Sarti E AU - Lightowlers M AU - Schantz P AD - Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoCtr Dis Control & Prevent, Div Parasit Dis, Natl Ctr Infect Dis, Atlanta, GA 30341, USAUniv Melbourne, Ctr Vet Clin, Werribee, Vic 3030, AustraliaInst Diagnost & Referencia Epidemiol SSA, Mexico City 11340, DF, MexicoHosp Gen Dr Manuel Gea Gonzalez, Direcc Invest, Mexico City 14000, DF, MexicoFlisser, A, Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico TI - Neurocysticercosis: regional status, epidemiology, impact and control measures in the Americas AB - The analysis of epidemiological data concerning human cysticercosis point to important advances in understanding the magnitude and distribution of this parasitic disease in Latin America, as well as the relationship of the elements that conform the life cycle of Taenia solium. The data indicate that the main risk factor for acquiring human neurocysticercosis and swine cysticercosis is the presence of the tapeworm carrier in the household. Therefore, several intervention measures for the control of cysticercosis have been evaluated: mass treatment in order to cure tapeworm carriers, health education towards understanding the risk factors, pig control by restraining them, experimental vaccination of pigs and treatment of swine cysticercosis. In this paper, we review the information obtained in these areas. We hope it will be useful in other endemic countries that wish to elaborate an action plan for the control and ultimate eradication of T. solium. (C) 2003 Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000183576700007 L2 - cestocidal drugs;cysticercosis;epidemiology;health education;pig restraint;Taenia solium;treatment of taeniosis;vaccination;TAENIA-SOLIUM CYSTICERCOSIS; RURAL GUATEMALAN COMMUNITIES; PRAZIQUANTEL TREATMENT; RISK-FACTORS; PORCINE BRAIN; MEXICO; VILLAGE; PIGS; VACCINATION; ANTIGENS SO - Acta Tropica 2003 ;87(1):43-51 8002 UI - 6615 AU - Flores-Alvarado DE AU - Esquivel-Valerio JA AU - Garza-Elizondo M AD - Univ Autonoma Nuevo Leon, Dept Med, Rheumatol Sect, Monterrey, MexicoLouisiana State Univ, Hlth Sci Ctr, Rheumatol Sect, New Orleans, LA 70112, USAFlores-Alvarado, DE, Univ Autonoma Nuevo Leon, Dept Med, Rheumatol Sect, Monterrey, Mexico TI - Linear scleroderma en Coup de Sabre and brain calcification: Is there a pathogenic relationship? Reply MH - Mexico|Nuevo Leon MH - USA PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Letter AV - English IS - 0315-162X UR - ISI:000187441800041 SO - Journal of Rheumatology 2003 ;30(12):2725-2725 8003 UI - 9389 AU - Flores-Alvarado DE AU - Esquivel-Valerio JA AU - Garza-Elizondo M AU - Espinoza LR AD - Louisiana State Univ, Hlth Sci Ctr, Dept Med, Rheumatol Sect, New Orleans, LA 70112, USAUniv Autonoma Nuevo Leon, Dept Med, Rheumatol Sect, Leon, MexicoFlores-Alvarado, DE, Louisiana State Univ, Hlth Sci Ctr, Dept Med, Rheumatol Sect, 1542 Tulane Ave, New Orleans, LA 70112 USA TI - Linear scleroderma en coup de sabre and brain calcification: Is there a pathogenic relationship? AB - Extracutaneous calcifications are rare in scleroderma and related conditions. We describe a female patient with linear scleroderma en coup de sabre and a longstanding clinical history of tonic and clonic convulsions. Radiographic study showed extensive cerebral calcifications in the right occipital hemisphere, homolateral to the involved side of her face. This report further suggests a relationship between localized scleroderma and neurological manifestations. Brain imaging studies should be routinely performed in scleroderma patients exhibiting neurological manifestations, especially seizure disorder MH - USA MH - Mexico|Guanajuato PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 7 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000180285600032 L2 - linear scleroderma;Parry-Romberg syndrome;morphea;Sturge-Weber syndrome;calcification;PROGRESSIVE FACIAL HEMIATROPHY; SYSTEMIC-SCLEROSIS; INVOLVEMENT SO - Journal of Rheumatology 2003 ;30(1):193-195 8004 UI - 7340 AU - Flores-Marquez EL AU - Surinach E AU - Galindo-Zaldivar J AU - Maldonado A AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Barcelona, Fac Geol, Dept Geodinam & Geofis, E-08028 Barcelona, SpainUniv Granada, Dept Geodinam, E-18071 Granada, SpainUniv Granada, Fac Ciencias, CSIC, Inst Andaluz Ciencias Tierra, E-18002 Granada, SpainFlores-Marquez, EL, Univ Nacl Autonoma Mexico, Inst Geofis, Cd Univ Circuito Exterior, Mexico City 04510, DF, Mexico TI - Three-dimensional gravity inversion model of the deep crustal structure of the central drake passage (Shackleton Fracture Zone and West Scotia Ridge, Antarctica) AB - [1] Gravity and bathymetric data collected by the Spanish R/V Hesperides over the Shackleton Fracture Zone (SFZ) and the West Scotia Ridge (WSR) were used to invert for the three-dimensional (3-D) structure of the deep crust. Data from the Global Gravity Grid and Global Seafloor Topography (GGSFT) were also employed to enlarge the cruise area. The merged data were analyzed to determine the 3-D deep structure by numerical inversion. Water layer contribution to the gravity anomaly was eliminated, taking into account the bathymetry. Spectral analysis of the reduced data yielded mean crust-mantle interface (CMI) depths of 10.5 +/- 1.2 km. Inversion of the regional anomaly gave a 3-D detailed geometry of the CMI, which generally agrees with the 2-D models established along profiles where gravity data and multichannel seismic lines are available. The WSR shows an asymmetrical structure with a reverse fault located southeastward to the central valley. This fault was developed, probably, as a consequence of the NW-SE compressive deformations, which occurred following the spreading. The 3-D view shows that the SW end of the spreading axis was affected more intensely by the compression. The SFZ represents an active sinistral transpressive fault zone of the Scotia-Antarctica plate boundary and shows crustal thickening related to bathymetric highs. The crustal thinning detected at the intersection with the inactive WSR suggests a complex interaction between these two structures MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000185652400003 L2 - three-dimensional deep structure;gravity;global gravity grid;global seafloor topography;numerical inversion;Shackleton Fracture Zone;MID-ATLANTIC RIDGE; SATELLITE ALTIMETRY; BATHYMETRIC PREDICTION; ANOMALIES; SEA; TECTONICS; PENINSULA; INTERSECTION; TOPOGRAPHY; TERRAIN SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B9): 8005 UI - 6620 AU - Flores-Sarnat L AU - Sarnat HB AU - vila-Gutierrez G AU - Alvarez A AD - Cedars Sinai Med Ctr, Dept Pediat Neurol, Los Angeles, CA 90048, USACedars Sinai Med Ctr, Dept Pathol Neuropathol, Los Angeles, CA 90048, USAInst Nacl Pediat, Neurol Serv, Mexico City, DF, MexicoChrustus St Joseph Hlth Syst, Pathol Lab, Paris, TX, USAFlores-Sarnat, L, Cedars Sinai Med Ctr, Dept Pediat Neurol, 4221 N Tower,8700 Beverly Blvd, Los Angeles, CA 90048 USA TI - Hemimegalencephaly: Part 2. Neuropathology suggests a disorder of cellular lineage AB - Cerebral tissue from hemispherectomy in three children (two 4-month-old girls and one 4-year-old boy) with hemimegalencephaly was studied using histochemical and immunocytochemical markers of neuronal and glial maturation and identity. Histologic abnormalities of cellular growth and cytomorphology, including "balloon cells," were present in both gray and white matter, in addition to disorganized tissue architecture. Cells in the mitotic cycle were absent. Many hypertrophic, atypical cells with enlarged processes exhibited mixed or ambiguous lineage, with immunoreactivity for both glial (glial fibrillary acidic protein [GFAP]; S-100beta) and neuronal proteins (microtubule-associated protein 2 [MAP2], neuronal nuclear antigen, chromogranin A, and neurofilament protein [NFP]). Strong vimentin reactivity was present in neurons, as well as glial cells and cells of mixed lineage, suggesting incomplete maturation. Synaptophysin-reactive axons terminated on a minority of balloon cells and on most heterotopic single neurons in white matter, confirmed by electron microscopy, demonstrating that single heterotopic neurons are not synaptically "isolated," as they may appear; thus, they are capable of contributing to epilepsy. Ofigodendrocytes are the least affected cells, at least in some cases. The findings are reminiscent of the hamartomas of tuberous sclerosis. We conclude that hemimegalencephaly is a primary disorder of neuroepithelial lineage and cellular growth. A migratory disturbance contributes to disorderly tissue architecture but is secondary No pathologic difference is detected between isolated and syndromic forms of hemimegalencephaly MH - USA MH - Mexico|Distrito Federal PB - HAMILTON: B C DECKER INC RP - NOT IN FILE U3 - TC 11 U4 - Clinical Neurology;Pediatrics U5 - J;Article AV - English IS - 0883-0738 UR - ISI:000187437400008 L2 - EPIDERMAL NEVUS SYNDROME; FOCAL CORTICAL DYSPLASIA; HUMAN FETAL EPENDYMA; NEURONAL MIGRATION; TUBEROUS SCLEROSIS; HEMISPHERECTOMY; HEMIHYPERTROPHY; PACHYGYRIA; EXPRESSION; SEIZURES SO - Journal of Child Neurology 2003 ;18(11):776-785 8006 UI - 8955 AU - Flores-Suarez LF AU - Cabiedes J AU - Villa AR AU - van der Woude FJ AU - cocer-Varela J AD - Inst Nacl Ciencias Med & Nutr, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr, Clin Epidemiol Unit, Mexico City 14000, DF, MexicoRuperto Carola Univ, Fac Clin Med Mannheim, Med Clin 5, Heidelberg, GermanyFlores-Suarez, LF, Inst Nacl Ciencias Med & Nutr, Dept Immunol & Rheumatol, Vasco de Quiroga 15,Col Secc 16, Mexico City 14000, DF, Mexico TI - Prevalence of antineutrophil cytoplasmic autoantibodies in patients with tuberculosis AB - Objective. To determine the prevalence of antineutrophil cytoplasmic autoantibodies (ANCA) in sera of patients with tuberculosis compared with healthy control subjects and a group of patients with atopic asthma. Methods. The presence of ANCA was examined in patients with tuberculosis, and in asthmatic patients and healthy subjects as control groups, by means of indirect immunofluorescence (IIF) and enzyme-linked inummosorbent assay (ELISA) to detect anti-proteinase 3 (PR3-ANCA) and antimyeloperoxidase (MPO-ANCA) antibodies. Results. ANCA were present in 20 (44.4%) of 45 tuberculosis patients by IIF (16 c-ANCA, four p-ANCA) and in 18 (40%) patients by ELISA (15 PR3-ANCA, three MPO-ANCA). High odds ratios for ANCA positivity were observed for tuberculosis patients when compared with both control groups. ANCA results were not related to the category of tuberculosis, stage of disease, presence of concomitant diseases or pharmacotherapy. Conclusions. As many clinical similarities between tuberculosis and Wegener's granulomatosis exist, we propose that a positive ANCA test in patients living in countries with a high prevalence of tuberculosis must be carefully interpreted as indicative of systemic vasculitis, especially when no signs of extrapulmonary involvement occur MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 13 U4 - Rheumatology U5 - J;Article AV - English IS - 1462-0324 UR - ISI:000181378100004 L2 - antineutrophil cytoplasm autoantibodies;tuberculosis;PERMEABILITY-INCREASING PROTEIN; ANTIBODIES ANCA; MYCOBACTERIUM-TUBERCULOSIS; WEGENERS GRANULOMATOSIS; SYSTEMIC VASCULITIS; BLOOD NEUTROPHILS; C-ANCA; ACTIVATION; EXPRESSION; INFECTION SO - Rheumatology 2003 ;42(2):223-229 8007 UI - 9207 AU - Flores-Suarez LF AU - Nowack R AU - Yard BA AU - Dempfle CE AU - van der Woude FJ AD - Univ Heidelberg, Klinikum Mannheim, Fac Clin Med Mannheim, Med Clin 5, Heidelberg, GermanyUniv Heidelberg, Klinikum Mannheim, Fac Clin Med Mannheim, Med Clin 1, Heidelberg, GermanyFlores-Suarez, LF, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco de Quiroga 15,Col Secc 16, Mexico City 14000, DF, Mexico TI - Effects of anti-neutrophil cytoplasm autoantibodies on tissue factor activity by HL-60 cells in vitro AB - The effects of cytoplasmic anti-neutrophil cytoplasm autoantibodies (C-ANCA) and perinuclear ANCA (P-ANCA) immunoglobulin G (IgG) on tissue factor (TF) activity using HL-60 cells in vitro were compared with those of medium, lipopolysaccharide (LPS) and control IgG. Cells were also incubated with both ANCA IgG and control IgG in the presence of a submaximal concentration of LPS capable of upregulating TF procoagulant activity (TF-PCA) measured in arbitrary units of TF equivalent (AU-TFEq). The purpose was to search for an additive effect between LPS and ANCA IgG. All IgG preparations increased HL-60 cell TF-PCA in comparison with the medium. When cells were incubated with P-ANCA IgG and LPS (1 mug/ml), a larger increase was seen (151.23 +/- 31.6 SEM (standard error of the mean) AU-TFEq) than when incubated with control IgG plus LPS (91.01 +/- 18.4 SEM AU-TFEq; P < 0.005), P-ANCA IgG alone (73.68 +/- 12.7 SEM AU-TFEq; P < 0.005) or LPS (1 mug/ml) (58.11 +/- 7.9 SEM AU-TFEq; P < 0.005). There was concordance between PCA and TF total antigen content by enzyme-linked immunosorbent assay (ELISA). The fact that P-ANCA IgGs upregulate the function of TF in HL-60 cells in combination with LPS adds to information regarding the possible role of ANCAs in the enhancement of TF by different cells, although it does not support the fact that ANCAs alone play a role in mononuclear cell TF upregulation. The additive effects of LPS underline the possible role of pro-inflammatory stimuli in the pathogenesis of ANCA-associated diseases MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Immunology U5 - J;Article AV - English IS - 0300-9475 UR - ISI:000180755000009 L2 - GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE GENE; PROTEINASE-3 MEDIATE EXPRESSION; FC-GAMMA RECEPTORS; CRESCENTIC GLOMERULONEPHRITIS; WEGENERS GRANULOMATOSIS; PROCOAGULANT ACTIVITY; HUMAN-MONOCYTES; ANTIMYELOPEROXIDASE ANTIBODIES; ENDOTHELIAL-CELLS; COMPLETE SEQUENCE SO - Scandinavian Journal of Immunology 2003 ;57(1):68-78 8008 UI - 9024 AU - Flores D AU - Marquez J AU - Garza M AU - Espinoza LR AD - Louisiana State Univ, Hlth Sci Ctr, Rheumatol Sect, Dept Med, New Orleans, LA 70112, USAUniv Hosp, Rheumatol Sect, Dept Med, Monterrey, MexicoEspinoza, LR, Louisiana State Univ, Hlth Sci Ctr, Rheumatol Sect, Dept Med, 1542 Tulane Ave, New Orleans, LA 70112 USA TI - Reactive arthritis: newer developments AB - Reactive arthritis (ReA) is characterized by an aseptic inflammatory articular involvement occurring in a genetically predisposed individual secondary to an infectious process localized outside the joint. ReA usually refers to an acute or insidious oligoarthritis process after enteric (enteroarthritis) or urogenital (uroarthritis) infection. Conventional antirheumatic therapeutic modalities based on nonsteroid anti-inflammatory drugs, sulfasalazine, and steroids are effective in the majority of patients. In more refractory cases, the use of second-line agents including methotrexate and more recently biological agents such as etanercept and infliximab has been found highly effective. The role of antibiotics remains not well established, although they appear to be effective in acute ReA of urogenital origin MH - USA MH - Mexico|Nuevo Leon PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 16 U4 - Rheumatology U5 - J;Review AV - English IS - 0889-857X UR - ISI:000181314300004 L2 - POLYMERASE-CHAIN-REACTION; CAMPYLOBACTER-JEJUNI ENTERITIS; SALMONELLA-SPECIFIC ANTIBODIES; 4TH INTERNATIONAL-WORKSHOP; CHLAMYDIA-TRACHOMATIS DNA; PLACEBO-CONTROLLED TRIAL; ACUTE RHEUMATIC-FEVER; T-CELL CLONES; REITERS-SYNDROME; ANKYLOSING-SPONDYLITIS SO - Rheumatic Disease Clinics of North America 2003 ;29(1):37-+ 8009 UI - 8161 AU - Flores F AU - Artigas J AU - Marty JL AU - Valdes F AD - Inst Tecnol La Laguna, Torreon 27000, Coahuila, MexicoUniv Autonoma Barcelona, Grp Sensors & Biosensors, Bellaterra 08193, Catalonia, SpainUniv Perpignan, Ctr Phytopharm, F-66860 Perpignan, FranceValdes, F, Inst Tecnol La Laguna, Cuauhtemoc & Revoluc S-N, Torreon 27000, Coahuila, Mexico TI - Development of an EnFET for the detection of organophosphorous and carbamate insecticides AB - A biosensor for the detection of insecticides based on an ion-sensitive field-effect transistor (ISFET) was developed. The resulting device combines the simplicity of potentiometric sensors and the use of associated electronic systems as powerful tools for the acquisition and the processing of data. The enzyme acetylcholinesterase (AChE) was entrapped in a membrane placed on the gate of the ISFET forming an enzyme field-effect transistor (EnFET). The biosensor is applied to the determination of pesticides in spiked real samples. Organophosphorous and carbamate insecticides were measured with a detection limit of 10(-8) mol L-1. The measurement is based on the production of hydrogen ions due to the hydrolysis of acetylthiocholine by the enzyme. The resulting local pH change is picked up by the underlying pH-sensitive ISFET and transduced as potential variations. The preparation of the membrane is simple and reproducible. The analysis in spiked real samples was performed in tap water and showed detection limits comparable to those obtained by other researchers MH - France MH - Mexico|Coahuila MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 4 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1618-2642 UR - ISI:000183633500011 L2 - EnFET;organophosphorous;carbamates;pesticide analysis;SENSITIVE DETECTION; PESTICIDE DETERMINATION; BIOSENSORS; ENZYME; ACETYLCHOLINESTERASE; CHOLINESTERASES; ELECTRODES; ISFET; TECHNOLOGY; SENSORS SO - Analytical and Bioanalytical Chemistry 2003 ;376(4):476-480 8010 UI - 6715 AU - Flores H AU - Menchaca J AU - Perez E AU - Cuisinier FJG AD - Univ Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Strasbourg 1, Strasbourg, France TI - In situ AFM observation of polyelectrolyte co-acervates structure of PEI and PSS MH - France MH - Mexico|San Luis Potosi PB - ALEXANDRIA: INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Meeting Abstract AV - English IS - 0022-0345 UR - ISI:000202893602284 SO - Journal of Dental Research 2003 ;82():B242-B242 8011 UI - 7526 AU - Flores W AU - Ochoa H AU - Briggs J AU - Garcia R AU - Kroeger A AD - Univ Liverpool Liverpool Sch Trop Med, Liverpool, Merseyside, EnglandECOSUR El Colegio Frontera Sur, Chiapas, MexicoMSH, Arlington, VA, USAKroeger, A, Univ Liverpool Liverpool Sch Trop Med, Pembroke Pl, Liverpool, Merseyside, England TI - Economic costs associated with inadequate drug prescribing: an exploratory study in Chiapas, Mexico AB - An exploratory study assessing the economic consequences of inadequate prescribing by health-care providers was carried out in two cities of Chiapas State, South Mexico. Two research methods were used: (a) an exit survey with pharmacy users (1190 interviews) and (b) in-depth individual interviews with patients at hospital level (19 interviews). For comparative purposes, three tracer conditions were selected: acute respiratory infection (ARI), diarrhoea) disease (DD) and hypertension. The main findings were that doctors, drug vendors at pharmacies, traditional healers, users of health-care services themselves (through self-prescription) and other health staff are all sources of inadequate prescribing and impose a substantial economic burden of unnecessary cost on health-care users. In general, treatment costs were high compared with standard treatments, and prescriptions included a high proportion of non-essential drugs (50-64%). Additional costs to the standard treatment were particularly high when the prescription was by a medical doctor (US$ 3.57 per ARI prescription and US$ 8.37 for DD). Losses attributable to inadequate prescribing averaged US$ 47 per patient. The study concludes that training programmes on rational drug use aimed exclusively at medical doctors can only have a limited effect in reducing economic losses due to inadequate prescribing. Such efforts should be extended to other providers who are very active in prescribing drugs and providing health advice. The main challenge that the Mexican health system will be facing in the foreseeable future is not only to improve equity of access to essential drugs, but also to improve quality of drug advice and prescription and rational use of drugs by the population. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Chiapas MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000185327100010 L2 - drug prescription;drug use;economic costs;health -care-seeking behaviour;Mexico;HEALTH-SEEKING BEHAVIOR; PHARMACIES; GUATEMALA; PATTERNS SO - Acta Tropica 2003 ;88(1):57-68 8012 UI - 8097 AU - Folch-Gabayet M AU - Wright J AD - Natl Autonomous Univ Mexico, Inst Matemat, Area Invest Cient, Mexico City 04510, DF, MexicoUniv Edinburgh, JCMB, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandFolch-Gabayet, M, Natl Autonomous Univ Mexico, Inst Matemat, Area Invest Cient, Ciudad Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - An estimation for a family of oscillatory integrals AB - Let K be a Calderon-Zygmund kernel and P a real polynomial defined on R-n with P(0) = 0. We prove that convolution with K exp(i/P) is continuous on L-2(R-n) with bounds depending only on K, n and the degree of P, but not on the coefficients of P MH - Mexico|Distrito Federal MH - United Kingdom PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0039-3223 UR - ISI:000183843600006 L2 - SINGULAR-INTEGRALS; HARMONIC-ANALYSIS; NILPOTENT GROUPS SO - Studia Mathematica 2003 ;154(1):89-97 8013 UI - 8492 AU - Foldvari I AU - Beregi E AU - Capelletti R AU - Baraldi A AU - Munoz A AU - Sosa R AD - HAS, Res Inst Solid State Phys & Opt, H-1121 Budapest, HungaryUniv Parma, INFM, I-43100 Parma, ItalyUniv Parma, Dept Phys, I-43100 Parma, ItalyUniv Autonoma Metropolitana Iztapalapa, Dept Phys, Mexico City 09340, DF, MexicoFoldvari, I, HAS, Res Inst Solid State Phys & Opt, Konkoly Thege U 29-33, H-1121 Budapest, Hungary TI - Growth and spectroscopic properties of Er : YAB single crystals AB - The Er-doped VAB (YAl3(BO3)(4)) is a potential self-frequency-doubling laser material. Single crystals were grown by the top-seeded flux method. The absorption spectra of the infrared Er3+ transitions were monitored in YAB crystals in the 9-300 K temperature range by high-resolution Fourier transform spectroscopy. In the whole spectral range the energy levels and Stark components of 12 transitions were detectable. In this paper the two infrared transitions (from the I-4(15/2) ground state to the I-4(13/2) and I-4(11/2) levels) were analyzed in detail. The low temperature absorption spectra of Er:YAB consist of sharp lines, the number of which corresponds to the theoretical predictions. This suggests that Er3+ ions occupy one specific lattice site (yttrium positions) with negligible aggregation at the higher dopant concentrations investigated (i.e. 0.12 Er atom/YAB mole) MH - Hungary MH - Italy MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Nuclear Science & Technology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1042-0150 UR - ISI:000182679000047 L2 - yttrium aluminum borate;YAB;Er dopant;absorption spectra;YTTRIUM ALUMINUM BORATE; LASER CRYSTAL; ENERGY-LEVELS; ND3+; ION SO - Radiation Effects and Defects in Solids 2003 ;158(1-6):285-288 8014 UI - 8666 AU - Foldvari I AU - Beregi E AU - Baraldi A AU - Capelletti R AU - Ryba-Romanowski W AU - Dominiak-Dzik G AU - Munoz A AU - Sosa R AD - Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1121 Budapest, HungaryUniv Parma, INFM, I-43100 Parma, ItalyUniv Parma, Dept Phys, I-43100 Parma, ItalyPAS, Res Inst Low Temp & Struct Res, Wroclaw, PolandUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoFoldvari, I, Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Konkoly Thege U 29-33, H-1121 Budapest, Hungary TI - Growth and spectroscopic properties of rare-earth doped YAl3(BO3)(4) single crystals AB - A recent trend for UV-visible lasers is based on rare-earth doped crystals with self-frequency doubling (SFD). According to its absorption, luminescence, and nonlinear optical properties, the Huntite structured YAB (YAl3(BO3)(4)) is a prospective representative of such materials. Efficient laser emission and SFD have already been demonstrated for Nd:YAB and Yb:YAB crystals. Er, Yb, and Dy doped YAB crystals were grown by the top-seeded flux technique. Narrow absorption lines at 9 K in the Er:YAB spectra proved the good crystal quality and the uniform Er incorporation. Weak satellite lines indicated Er interactions either with other Er ions or crystal defects at high Er concentrations. The good crystal quality was confirmed by the long (I. 11 ms) luminescence lifetime at RT in the Yb:YAB crystals. The Yb-transitions were broadened by strong coupling with lattice vibrations. The first growth and spectroscopic investigation of Dy:YAB were reported. Concentration dependent lifetime of the Dy luminescence was observed. (C) 2003 Elsevier Science B.V. All rights reserved MH - Hungary MH - Italy MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000182376000074 L2 - YAB;self-frequency doubling;crystal growth;rare-earth spectroscopy;YTTRIUM ALUMINUM BORATE; SUMMING NYAB LASER; CONTINUOUS-WAVE; OPTICAL-PROPERTIES; ENERGY-LEVELS; ND3+ ION; MU-M; GENERATION; GREEN; ER3+ SO - Journal of Luminescence 2003 ;102():395-401 8015 UI - 4394 AU - Foltz DW AU - Hrincevich AW AU - Rocha-Olivares A AD - Louisiana State Univ, Baton Rouge, LA 70803, USACICESE, Mexico City, DF, Mexico TI - Substitution patterns for mitochondrial genes vary with mode of reproduction in marine invertebrate species MH - Mexico|Distrito Federal MH - USA PB - MCLEAN: SOC INTEGRATIVE COMPARATIVE BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Meeting Abstract AV - English IS - 1540-7063 UR - ISI:000222235200758 SO - Integrative and Comparative Biology 2003 ;43(6):992-992 8016 UI - 7610 AU - Fonseca-Reyes S AU - de Alba-Garcia JG AU - Parra-Carrillo JZ AU - Paczka-Zapata JA AD - Hosp Civil Guadalajara Dr Juan I Menchaca, Inst Invest Cardiovasc, Guadalajara, Jalisco, MexicoInst Mexicano Seguro Social, Mexico City, DF, MexicoUniv Guadalajara, Guadalajara, SpainInst Oftalmol & Ciencias Visuales, Mexico City, DF, MexicoFonseca-Reyes, S, Jose Enrique Rodo 2921,CP 44650, Guadalajara, Jalisco, Mexico TI - Effect of standard cuff on blood pressure readings in patients with obese arms. How frequent are arms of a 'large circumference'? AB - Objective To measure the effect on blood pressure readings when a standard cuff is used on patients with arms of a large circumference, and to determine the frequency of arms of a large circumference. Subjects Blood pressures were taken in 120 subjects with an arm circumference greater than 33 cm. Also, the arm circumference was determined in 244 patients from a family health unit, and in 216 patients from a hypertension clinic. Method A mercury sphygmomanometer and two different cuff sizes were used in a random sequence; therefore, 60 patients' blood pressure were first measured with a large cuff, followed by a standard cuff; the opposite sequence was then applied for another 60 patients. With the obtained values and using a regression analysis, the difference in blood pressure overestimation was calculated. Arm circumference measurement percentages were used to determine the frequency of arms of a large circumference. Results Both systolic and diastolic blood pressures were significantly greater when the standard cuff was used. For every 5 cm increase in arm circumference, starting at 35 cm, a 2-5 mmHg increase in systolic blood pressure, and a 1-3 mmHg increase in diastolic blood pressure was observed. The prevalence of arms with a large circumference in the family medicine unit and hypertension clinic was 42% and 41.8%, respectively. Conclusions There is an overestimation of blood pressure when a standard cuff is used in obese subjects. The high prevalence of these individuals in our environment, both in the hypertensive and normotensive population, makes it necessary to have on hand different sizes of cuffs for taking blood pressure in order to avoid incorrect decisions. (C) 2003 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 1359-5237 UR - ISI:000184977800002 L2 - blood pressure measurement;clinic blood pressure;arm circumference;miscuffing;SIZE; SPHYGMOMANOMETRY; HYPERTENSION; ADULTS SO - Blood Pressure Monitoring 2003 ;8(3):101-106 8017 UI - 6951 AU - Font J AU - Ramos-Casals M AU - Carmona F AU - Garcia-Carrasco M AU - Claver G AU - Cervera R AU - Cararach V AU - Ingelmo M AD - Hosp Clin Barcelona, Dep Autoimmune Dis, Barcelona, SpainHosp Clin Barcelona, Dept Obstet, Barcelona, SpainBUAP, Dept Rheumatol, Puebla, Mexico TI - Outcome of 29 pregnancies in women with systemic lupus erythematosus and diffuse proliferative glomerulonephritis MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432800417 SO - Arthritis and Rheumatism 2003 ;48(9):S180-S180 8018 UI - 6959 AU - Font J AU - Ramos-Casals M AU - Claver G AU - Gil V AU - Brito-Zeron P AU - Cervera R AU - Garcia-Carrasco M AU - Ingelmo M AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainBUAP, Dept Rheumatol, Puebla, Mexico TI - Long-term persistence of high anti-dsDNA levels in SLE patients without renal disease MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801517 SO - Arthritis and Rheumatism 2003 ;48(9):S572-S573 8019 UI - 7815 AU - Forbes GW AU - Alonso MA AU - Siegman AE AD - QED Technol Inc, Rochester, NY 14607, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62260, Morelos, MexicoStanford Univ, Edward L Ginzton Lab, Stanford, CA 94305, USAStanford Univ, Dept Elect Engn, Stanford, CA 94305, USAForbes, GW, QED Technol Inc, 1040 Univ Ave, Rochester, NY 14607, USA TI - Uncertainty relations and minimum uncertainty states for the discrete Fourier transform and the Fourier series AB - The conventional Fourier transform has a well-known uncertainty relation that is defined in terms of the first and second moments of both a function and its Fourier transform. It is also well known that Gaussian functions, when translated to an arbitrary centre and supplemented by a linear phase factor, provide a complete set of minimum uncertainty states (MUSs) that exactly achieves the lower bound set by this uncertainty relation. A similarly general set of MUSs and uncertainty relations are derived here for discrete and/or periodic generalizations of the Fourier transform, namely for the discrete Fourier transform and the Fourier series. These extensions require a modified definition for the width of a periodic distribution, and they lead to more complex uncertainty relations that turn out to depend on the centroid location and mean frequency of the distribution. The derivations lead to novel generalizations of Hermite-Gaussian functions and, like Gaussians, the MUSs can play a special role in a range of Fourier applications MH - Mexico|Morelos MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000184435400011 L2 - PHASE UNCERTAINTY; OPTICAL-PHASE SO - Journal of Physics A-Mathematical and General 2003 ;36(25):7027-7047 8020 UI - 7051 AU - Fosalba P AU - Gaztanaga E AU - Castander FJ AD - Inst Astrophys, F-75014 Paris, FranceCSIC, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, SpainInst Nacl Astrofis Opt & Elect, Puebla 7200, MexicoFosalba, P, Inst Astrophys, 98bis Blvd Arago, F-75014 Paris, France TI - Detection of the integrated Sachs-Wolfe and Sunyaev-Zeldovich effects from the cosmic microwave background-galaxy correlation AB - We present a cross-correlation analysis of the Wilkinson Microwave Anisotropy Probe cosmic microwave background (CMB) temperature anisotropies and the Sloan Digital Sky Survey galaxy density fluctuations. We find significant detections of the angular CMB-galaxy correlation for both a flux-limited galaxy sample (zsimilar to0.3) and a high-redshift (zsimilar to0.5) color-selected sample. The signal is compatible with that expected from the integrated Sachs-Wolfe (ISW) effect at large angles (theta>4degrees) and the Sunyaev-Zeldovich (SZ) effect at small scales (theta<1&DEG;). The detected correlation at low z is in good agreement with a previous analysis using the Automated Plate Measuring survey (z&SIM;0.15). The combined analysis of all three samples yields a total significance of better z&SIM;0.15 than 3 σ for the ISW effect and of about 2.7 σ for the SZ effect, with a Compton parameter <(y)over bar>similar or equal to10(-6). For a given flat Lambda cold dark matter model, the ISW effect depends on both the value of Omega(Lambda) and the galaxy bias b. To break this degeneracy, we estimate the bias using the ratio between the galaxy and mass autocorrelation functions in each sample. With our bias estimation, all samples consistently favor a best-fit dark-energy-dominated model: Omega(Lambda)similar or equal to0.8, with a 2 sigma error Omega(Lambda)=0.69-0.86 MH - France MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 73 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186433200001 L2 - cosmic microwave background;cosmology : observations;PROBE WMAP OBSERVATIONS; DIGITAL SKY SURVEY; MODEL SO - Astrophysical Journal 2003 ;597(2):L89-L92 8021 UI - 8567 AU - Fox SR AU - Fox KM AU - Srikanth MS AU - Rumbaut R AD - Med Serv Org, Surg Weight Loss Clin, Tacoma, WA 98418, USAHosp San Jose, ITESN, Monterrey, MexicoFox, SR, Med Serv Org, Surg Weight Loss Clin, 3716 Pacific Ave,Suite B, Tacoma, WA 98418 USA TI - The Lap-Band (R) system in a North American population AB - Background: European and Australian results with laparoscopic adjustable gastric banding (LAGB) using the Lap-Band(R) (Inamed Health, Santa, Barbara, CA) have been impressive, with over 100,000 procedures completed at this writing. However, prior to U.S. FDA approval in June 2001, U.S. patients had to travel out of the U.S. for this procedure. This study reports on a series of U.S. patients who requested off-shore referral for LAGB placement. Methods: 105 U.S. patients were implanted with the Lap-Band System in Mexico by one surgeon in a private practice. 70% were implanted with the perigastric approach, while the final 30% were implanted using the pars flaccida approach. Routine postoperative visits, including band adjustments, were completed in a private U.S. clinic where medical staff performed frequent small adjustments as necessary to optimize results. Data were collected from concurrent and retrospective chart reviews and from telephone interviews. Summary statistics provided for baseline measures included mean +/- standard deviation. Postoperative measures of weight loss included mean +/- standard error. Results: Weight loss results were comparable to international results: 61% EWL at 12 months (n=50), 75% EWL at 24 months (n=37),72% EWL at 36 months (n=24), and 60% EWL at 48 months (n=7). There were few major complications. Conclusion: Attention to patient management is essential to success, and this study found that appropriately-managed U.S. LAGB patients can be as successful as their international counterparts. Frequent follow-up delivered by a bariatric team with easy access to band adjustments is essential MH - Mexico|Nuevo Leon MH - USA PB - TORONTO: F D-COMMUNICATIONS INC RP - NOT IN FILE U3 - TC 14 U4 - Surgery U5 - J;Article AV - English IS - 0960-8923 UR - ISI:000182605300010 L2 - morbid obesity;bariatric surgery;weight loss;complications;laparoscopic adjustable gastric banding;Lap-Band (R);MORBID-OBESITY; SURGERY SO - Obesity Surgery 2003 ;13(2):275-280 8022 UI - 8823 AU - Fraga BM AU - Alvarez L AU - Suarez S AD - CSIC, Inst Prod Nat & Agrobiol, Tenerife 38206, Canary Isl, SpainUniv La Laguna, Inst Univ Bio Organ Antonio Gonzalez, Tenerife, SpainUniv Autonoma Estado Moelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoFraga, BM, CSIC, Inst Prod Nat & Agrobiol, POB 195, Tenerife 38206, Canary Isl, Spain TI - Biotransformation of the diterpenes epicandicandiol and candicandiol by Mucor plumbeus AB - The microbiological transformation of the diterpene epicandicandiol (1) with Mucor plumbeus gave foliol (3), sideritriol (5), and 7beta,16alpha,17,18-tetrahydroxy-ent-kaurane (7), while the incubation of candicandiol (2) gave 7alpha,9beta,18-trihydroxy-ent-kaur-16-ene (10), canditriol (11), and 7alpha,16alpha,17,18-tetrahydroxy-entkaurane (12). Thus, the main difference observed in both feedings, resulting from the spatial change in the orientation of the 7-hydroxyl, from axial in the substrate 1 to equatorial in 2, was the formation of a 3alpha- and a 9beta-hydroxylated derivative, respectively MH - Mexico|Morelos MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000181923100002 L2 - MICROBIOLOGICAL HYDROXYLATION; MICROBIAL TRANSFORMATION; GIBBERELLA-FUJIKUROI; ENT-KAURANE; DERIVATIVES; SCLAREOL SO - Journal of Natural Products 2003 ;66(3):327-331 8023 UI - 6383 AU - Fragoso C AU - Brown G AU - Feijoo A AD - Inst Ecol AC, Soil Biol Dept, Xalapa 91000, Veracruz, MexicoCtr Nacl Pesquisa Soja, Londrina, BrazilUniv Tecnol Pereira, Pereira, ColombiaFragoso, C, Inst Ecol AC, Soil Biol Dept, AP 63, Xalapa 91000, Veracruz, Mexico TI - The influence of Gilberto Righi on tropical earthworm taxonomy: the value of a full-time taxonomist AB - During 40 years of active research, G. Righi published 85 papers on earthworm taxonomy, 5 on earthworm physiology, 5 on earthworm ecology and 3 on earthworm biogeography. In addition he published 16 papers on microdrile oligochaetes, and 17 on other groups (mainly crustaceans and molluscs). Most of his megadrile taxonomical papers related to Brazilian earthworms, although he also studied earthworms from other South and Central American countries (Colombia, Venezuela, Argentina, Ecuador, Peru, Bolivia, Mexico, Belize, Costa Rica,) and some Lower Antilles. G. Righi described one family, 25 genera and 224 species, mainly from Brazil (139 spp. in 16 genera), Colombia (36 spp., 5 genera) and Venezuela (24 spp., 2 genera). The majority of these new taxa belong to the Family Glossoscolecidae (161 spp, 14 genera). Analysis of the taxonomic production of G. Righi reveals a description rate of 6.4 species per year. This paper discusses the possibility of a complete worldwide species inventory, considering Righi's rate of new species description MH - Brazil MH - Colombia MH - Mexico|Veracruz PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 0031-4056 UR - ISI:000188421700002 L2 - species description rates;Glossoscolecidae;Brazil SO - Pedobiologia 2003 ;47(5-6):400-404 8024 UI - 6656 AU - Francis BP AU - Bryce M AU - Graham MF AU - Holloway AJ AU - Lopez JA AD - Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England. UNAM, Inst Astron, Ensenada 22860, Baja California, Mexico TI - The jets of NGC 6543 AB - High spectral resolution observations of the high speed jets of NGC 6543 are presented. When deprojected, these give velocities of Y-north = -82.0 km s(-1) and V-south = 63.8 km s(-1) MH - United Kingdom MH - Mexico|Baja California T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400150 SO - 2003 ;(209):493-494 8025 UI - 7832 AU - Franco-Gordo C AU - Godinez-Dominguez E AU - Suarez-Morales E AU - Vasquez-Yeomans L AD - Univ Guadalajara, Ctr Ecol Costera, San Patricio Melaque 48980, Jalisco, MexicoEl Colegio Frontera Sur, Chetumal 77000, Quintana Roo, MexicoFranco-Gordo, C, Univ A Coruna, Dept Biol Anim Vegetal & Ecol, Campus Zapateira S-N, La Coruna 15071, Spain TI - Diversity of ichthyoplankton in the central Mexican Pacific: a seasonal survey AB - The seasonal variation in the diversity of ichthyoplankton was analyzed from samples collected monthly during a year cycle off the central Pacific coast of Mexico. Samples were collected using a Bongo net at 12 stations during I I months, from December 1995 through December 1996. The most dominant species was Bregmaceros bathymaster, its relative density varied between 77 and 98%. Two main seasonal patterns were revealed after analyzing the dynamics of the coastal water mass and the ichthyoplankton assemblage ordination in relation to diversity. Diversity values (jack-knifed H = 0.24) were relatively low from January to May, and indicated a first seasonal pattern, related to a period dominated by the influence of the California Current, with surface temperatures ranging between 21 and 24degreesC. The second pattern was featured by diversity values five-fold higher than in the winter-spring (H = 0.92). These were related to the influence of warm, tropical waters from the Equatorial Countercurrent, with associated temperatures ranging between 26 and 29.2degreesC. A transitional period was identified in June and December; it represented a mixed assemblage and yielded the highest richness. Diversity null models were useful as tools to confirm the major seasonal patterns of the surveyed ichthyoplankton community. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Jalisco MH - Mexico|Quintana Roo MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000184500300010 L2 - diversity;rarefaction;Shannon index;probability of interspecific encounter;fish larvae;null models;continental shelf;LARVAL FISH ASSEMBLAGES; COASTAL WATERS; JALISCO; COLIMA; DISTRIBUTIONS; GULF SO - Estuarine Coastal and Shelf Science 2003 ;57(1-2):111-121 8026 UI - 7608 AU - Franco-Paredes C AU - Santos JI AD - Ctr Nacl Salud Infancia & Adolescencia, Secretaria Salud, Mexico City 01600, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Microbiol & Inmunol Clin, Dept Expt Med, Mexico City 04510, DF, MexicoEmory Univ, Sch Med, Div Infect Dis, Atlanta, GA, USAFranco-Paredes, C, Ctr Nacl Salud Infancia & Adolescencia, Secretaria Salud, Francisco P Miranda 177 2 Piso, Mexico City 01600, DF, Mexico TI - Parasitology resources on the World Wide Web: A powerful tool for infectious disease practitioners AB - We summarize representative and dependable English-language Web sites that focus on parasitic infections, selected on the basis of high-quality content and usability. Web sites were categorized according to users' interests, as follows: Web sites with information for clinicians (pathogenesis, pathophysiology, diagnosis, and treatment of parasitic infections); Web sites with information for epidemiologists; Web sites with information for educators; and Web sites with information for researchers. At least 60 Web sites were identified that contained comprehensive and high-quality information about helminths and protozoa. These Internet resources provide invaluable information for the infectious disease practitioner MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000185001900013 L2 - COGNITIVE FUNCTION; INTERNET SO - Clinical Infectious Diseases 2003 ;37(5):694-701 8027 UI - 8133 AU - Franco J AU - Crossa J AU - Taba S AU - Shands H AD - CIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoUniv Republ Oriental Uruguay, Fac Agron, Montevideo 12900, UruguayCIMMYT, Maize Genet Resources Unit, Mexico City 06600, DF, MexicoUSDA ARS, Natl Seed Storage Lab, Ft Collins, CO 80523, USACrossa, J, CIMMYT, Biometr & Stat Unit, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - A multivariate method for classifying cultivars and studying group x environment x trait interaction AB - Classification methods are used in genetic resource conservation and plant breeding. The two-stage Ward-Modified Location Model (Ward-MLM) clustering strategy defines initial groups by the Ward method and the MLM is then used to improve those groups. The three-way clustering strategy considers the same trait measured in different environments as different variables (environment-trait combination), so that the resulting dusters of cultivars have a small group X environment interaction (GEI) for all the traits included in the study. An important component of the GEI is the imperfect genotypic correlation or crossover interaction (COI). This study used the three-way Ward-MLM clustering strategy in three different data sets with the objectives of (i) evaluating the ability of the Ward-MLM methodology for clustering cultivars into groups with low COL (ii) obtaining a graphical representation of the variables in a low dimensional scatter plot produced by the multidimensional scaling method (MDS) in which the GEI of continuous and categorical traits and environments can be visualized, and (iii) studying how the relationship between a pair of traits changes across environments. The three-way Ward-MLM strategy produced groups of cultivars with low levels of COL The increment of the correlation coefficient values between groups with respect to the total correlation coefficients indicated that the groups formed by the three-way Ward-MLM strategy comprised subsets of individuals that had similar trait responses across environments MH - Mexico|Distrito Federal MH - Uruguay MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000183762800002 L2 - SHIFTED MULTIPLICATIVE MODEL; GENETIC-RESOURCES; RANK-CHANGE; MAIZE; TRIALS SO - Crop Science 2003 ;43(4):1249-1258 8028 UI - 8606 AU - Franco M AU - Castro G AU - Romero L AU - Regalado JC AU - Medina A AU - Huesca-Gomez C AU - Ramirez S AU - Montano LF AU - Posadas-Romero C AU - Perez-Mendez O AD - Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Mexico City 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Endocrinol, Mexico City 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Cellular Biol, Mexico City 14080, DF, MexicoInst Pasteur, INSERM, U325, F-59019 Lille, FrancePerez-Mendez, O, Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Juan Badiano 1,Secc 16, Mexico City 14080, DF, Mexico TI - Decreased activity of lecithin : cholesterol acyltransferase and hepatic lipase in chronic hypothyroid rats: Implications for reverse cholesterol transport AB - Chronic hypothyroidism is frequently associated with atherosclerosis due to increased cholesterol plasma levels; nevertheless, the contribution of impaired reverse cholesterol transport (RCT) in this process has not been completely elucidated. The aim of this study was to evaluate the effect of thyroidectomy (Htx) upon the main stages of RCT in rats. Plasma lipid alterations induced by thyroidectomy showed a slight, but significant, reduction of total plasma triglycerides, a 300% increase of LDL-cholesterol and a 25% decrease in HDL-cholesterol compared to control rats. We evaluated the first stage of RCT determining H-3-cholesterol efflux in Fu5AH cells. The capacity of HDL obtained from Htx rats to promote cholesterol efflux was similar to that of controls. Lecithin: cholesterol acyltransferase (LCAT) activity, the second stage and the driving force of RCT was 30% lower in Htx animals compared to controls, as determined by reconstituted HDL used as an external substrate. Lipoproteins are remodeled by hepatic lipase; the mean activity of this enzyme in postheparin plasma of Htx animals was reduced by 30% compared to controls, thus suggesting an impaired HDL remodeling by this enzyme in the hypothyroid status. In contrast, lipoprotein lipase activity in the Htx group was unchanged. In summary, this study demonstrates that chronic hypothyroidism in the rat induced an impaired RCT mainly at the cholesterol esterification, and HDL remodeling mediated by hepatic lipase. The latter probably results in an abnormal HDL structure, i.e. phospholipid enrichment, which contributes to decrease HDL-apo AI fractional catabolic rates MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology U5 - J;Article AV - English IS - 0300-8177 UR - ISI:000182462800009 L2 - reverse cholesterol transport;cholesterol efflux;high-density lipoproteins;lecithin : cholesterol acyltranferase;hepatic lipase;hypothyroidism;HIGH-DENSITY-LIPOPROTEIN; APOLIPOPROTEIN-A-I; ESTER TRANSFER PROTEIN; PRE-BETA; PLASMA-LIPOPROTEINS; RECEPTOR GENE; SERUM; HDL; SUBSTRATE; DISEASE SO - Molecular and Cellular Biochemistry 2003 ;246(1-2):51-56 8029 UI - 9229 AU - Fregnani ER AU - Pires FR AU - Quezada RD AU - Shih IM AU - Vargas PA AU - de Almeida OP AD - UNICAMP, Sch Dent Piracicaba, BR-13414903 Piracicaba, SP, BrazilState Univ Rio de Janeiro, Sch Dent, Rio De Janeiro, BrazilNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoJohns Hopkins Univ Hosp, Dept Pathol, Sch Med, Baltimore, MD 21287, USAde Almeida, OP, UNICAMP, Sch Dent Piracicaba, Ave Limeira 901,Caixa Postal 52, BR-13414903 Piracicaba, SP, Brazil TI - Calcifying odontogenic cyst: clinicopathological features and immunohistochemical profile of 10 cases AB - Background: Calcifying odontogenic cyst (COC) is an uncommon odontogenic lesion with few studies describing its immunohistochemical profile and proliferative activity reported in the literature. Methods: Clinical and histological features and immunohistochemical expression of cytokeratins, Mel-CAM (CD146), bcl-2, PCNA and ki-67, in 10 cases of COC were studied. Results: All 10 cases affected the maxilla, eight intraosseous and two peripheral. Five central cases were cystic and three were cystic associated with odontoma, and the two extraosseous showed solid histological pattern; immunohistochemistry was positive for cytokeratins 8, 14, 19, AE1/AE3 and 34betaE12 and bcl-2 in all cases, and Mel-CAM in six cases. Proliferative activity was greater in the epithelium of central cystic COC in relation to COC associated with odontoma and peripheral lesions. Conclusion: Calcifying odontogenic cysts showed odontogenic cytokeratin profile and bcl-2 and Mel-CAM expression indicate that these proteins may be involved in the development of COC. There were no recurrences after surgery, irrespective of their proliferative activity MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 6 U4 - Dentistry, Oral Surgery & Medicine;Pathology U5 - J;Article AV - English IS - 0904-2512 UR - ISI:000180814200005 L2 - calcifying odontogenic cyst;CD146;cytokeratins;ghost cells;immunohistochemistry;Mel-CAM;PROLIFERATIVE ACTIVITY; EXPRESSION; CYTOKERATINS; INVOLUCRIN; PROTEINS; TUMORS; TISSUE; WALL SO - Journal of Oral Pathology & Medicine 2003 ;32(3):163-170 8030 UI - 9465 AU - Frias S AU - Van Hummelen P AU - Meistrich ML AU - Lowe XR AU - Hagemeister FB AU - Shelby MD AU - Bishop JB AU - Wyrobek AJ AD - Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program L448, Livermore, CA 94550, USAUniv Nacl Autonoma Mexico, Inst Nacl Pediat Secretaria, Lab Citogenet, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Texas, MD Anderson Canc Ctr, Dept Expt Radiat Oncol, Houston, TX 77030, USAUniv Texas, MD Anderson Canc Ctr, Dept Lymphoma & Myeloma, Houston, TX 77030, USANIEHS, Res Triangle Pk, NC 27709, USAWyrobek, AJ, Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program L448, 7000 East Ave, Livermore, CA 94550 USA TI - NOVP chemotherapy for Hodgkin's disease transiently induces sperm aneuploidies associated with the major clinical aneuploidy syndromes involving chromosomes X, Y, 18, and 21 AB - The objective of this research was to determine whether Novantrone, Oncovin, Velban, and Prednisone (NOW) combination chemotherapy for Hodgkin's disease increases the frequencies of the specific types of aneuploid sperm that might elevate the risk of fathering a child with one of the major clinical aneuploidy syndromes, i.e., Down (disomy 21 sperm), Edward (disomy 18 sperm), Turner (nullisomy sex sperm), XYY (disomy Y sperm), triple X (disomy X sperm), or Klinefelter (XY sperm). A four-chromosome multicolor sperm fluorescence in-situ hybridization assay that simultaneously evaluates chromosomes 18, 21, X, and Y was applied to semen provided by four healthy men and to repeated samples of eight Hodgkin's disease patients before treatment, 35-50 days after treatment to examine the effects of treatment on male meiotic cells, and 1-2 years after treatment to measure the persistence of damage. There were chromosome-specific variations in baseline frequencies and significant inductions of all of the detectable types of sperm aneuploidies: XY sperm (14-fold increase), disomy 18 (7-fold), nullisomy sex (3-fold), disomy 21 (3-fold), and disomy X and Y (similar to2-fold each). Disomy 21 was about twice as frequent as disomy 18, and neither showed a preferential segregation with a sex chromosome. Extrapolating across the genome, similar to18% of sperm carried a numerical abnormality after NOW treatment of meiotic cells. Induced effects did not persist to 1-2 years after treatment, suggesting that persistent spermatogonial stem cells were not sensitive to NOW. These findings establish the hypothesis that conception shortly after certain chemotherapies can transiently increase the risks of fathering aneuploid pregnancies that terminate during development or result in the birth of children with major human aneuploidy syndromes MH - USA MH - Mexico|Distrito Federal PB - BIRMINGHAM: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 16 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000180290500010 L2 - IN-SITU HYBRIDIZATION; TESTICULAR CANCER-PATIENTS; MAMMALIAN GERM-CELLS; LONG-TERM SURVIVORS; MULTICOLOR FISH; COMBINATION CHEMOTHERAPY; ADOLESCENT CANCER; GENETIC-DISEASE; HEALTHY-MEN; ABNORMALITIES SO - Cancer Research 2003 ;63(1):44-51 8031 UI - 8255 AU - Fridman L AU - Strygin V AU - Polyakov A AD - Natl Autonomous Univ Mexico, DEP FI, Mexico City 04510, DF, MexicoVoronezh State Univ, Dept Appl Math, Voronezh 394693, RussiaFridman, L, Natl Autonomous Univ Mexico, DEP FI, Edificio A,Ciudad Univ,AP 70-256, Mexico City 04510, DF, Mexico TI - Stabilization of amplitude of oscillations via relay delay control AB - Time delay does not allow realizing an ideal sliding mode, but implies oscillations in the state space. It is shown that relay delay controllers allow us to achieve stabilization for amplitude of oscillations suppressing uncertainties in a time delay even in the case when the time delay is variable. Sufficient conditions for a relay delay stabilization are found. The obtained results are illustrated in the example of the relay delay stabilization for the inverted pendulum MH - Mexico|Distrito Federal MH - Russia PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000183441600002 L2 - SLIDING MODE CONTROL; ROBUST STABILIZATION; SYSTEMS; COMPENSATION SO - International Journal of Control 2003 ;76(8):770-780 8032 UI - 7716 AU - Friedman R AU - Mostefaoui A AU - Rajsbaum S AU - Raynal M AD - Technion Israel Inst Technol, Dept Comp Sci, IL-32000 Haifa, Israel. Inst Rech Informat & Syst Aleatoires, F-35042 Rennes, France. HP Res Lab, Cambridge, MA 02139, USA. UNAM, Inst Matemat, Mexico City, DF, Mexico TI - Using error-correcting codes to solve distributed agreement problems: A future direction in distributed computing? MH - Mexico|Distrito Federal MH - Israel MH - France MH - USA T3 - FUTURE DIRECTIONS IN DISTRIBUTED COMPUTING: RESEARCH AND POSITION PAPERSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBX24B AV - English IS - 0302-9743 UR - ISI:000184718100003 SO - 2003 ;():17-21 8033 UI - 6120 AU - Frolova YV AU - Khabibulin D AU - Sazonova NN AU - Pavlova SN AU - Lapina OB AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoBoreskov Inst Catalysis, Novosibirsk, Russia TI - Oxidative dehydrogenation of propane over vanadia-magnesia catalysts prepared with different vanadium precursors MH - Mexico|Baja California MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187062401874 SO - Abstracts of Papers of the American Chemical Society 2003 ;226():U392-U393 8034 UI - 9182 AU - Fuchs EJ AU - Lobo JA AU - Quesada M AD - Univ Nacl Autonoma Mexico, Dept Ecol Recursos Nat, Inst Ecol, Morelia 58089, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Jose, Costa RicaQuesada, M, Univ Nacl Autonoma Mexico, Dept Ecol Recursos Nat, Inst Ecol, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Effects of forest fragmentation and flowering phenology on the reproductive success and mating patterns of the tropical dry forest tree Pachira quinata AB - The results of several studies suggest that forest fragmentation affects the mating patterns and reproductive success of tropical tree species by reducing pollinator activity, pollen deposition, and outcrossing levels. The flowering synchrony of trees has also been proposed as an additional factor in controlling fruit set and regulating levels of outcrossing, particularly in disturbed habitats. We examined the effects of forest fragmentation and flowering phenology on the reproductive success and genetic structure of the progeny produced by the tropical tree Pachira quinata . We conducted our study in the dry forest of Costa Rica and compared trees in two density and environmental conditions: ( 1 ) isolated trees separated by 500 m from other adult conspecifics and located in disturbed sites and ( 2 ) trees from continuous populations of groups of 20 or more reproductive individuals per hectare surrounded by undisturbed mature forest. Our study was conducted in the Guanacaste Conservation Area, Costa Rica, and surrounding areas. To evaluate flowering phenology, trees were classified as having synchronous or asynchronous flowering. The phenological stage of individuals was classified according to the proximity of the peak flowering date of each tree with respect to the mean peak flowering of the rest of the population. Six percent of the flowers produced a fruit in trees from continuous populations, whereas in isolated trees only 3% of the flowers did so. Fruit set was not affected by the flowering phenology of trees but was influenced mainly by factors associated with forest fragmentation. Seed production per fruit was not affected by forest fragmentation or flowering phenology. Overall, total fruit production per tree was not affected by forest fragmentation, because isolated trees tended to produce more flowers than trees from continuous populations. Genetic analysis revealed that the progeny of trees from continuous populations experienced lower levels of relatedness, a tendency for higher levels of outcrossing, and/or more sires than isolated trees. Our results suggest that forest fragmentation can have an effect on the mating patterns of P. quinata , reducing the number of outcross sires represented in the progeny of isolated trees MH - Costa Rica MH - Mexico|Michoacan PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 27 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000180846200019 L2 - CEIBA-PENTANDRA BOMBACACEAE; HABITAT FRAGMENTATION; GENETIC CONSEQUENCES; GLOSSOPHAGA-SORICINA; PLANT CONSERVATION; POLLINATION; SYSTEM; DIPTEROCARPACEAE; DENSITY; POLLEN SO - Conservation Biology 2003 ;17(1):149-157 8035 UI - 7165 AU - Fuentes AF AU - Garza-Garcia M AU - Escalante-Garcia JI AU - Mendoza-Suarez G AU - Boulahya K AU - Amador U AD - IPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoUniv Complutense, Fac Ciencias Quim, Dept Quim Inorgan, Madrid 28040, SpainUniv San Pablo, CEU, Dept CC Quim, Fac Ciencias Expt & Salud, Madrid 28668, SpainFuentes, AF, IPN, CINVESTAV, Unidad Saltillo, Apartado Postal 663, Saltillo 25000, Coahuila, Mexico TI - Synthesis and structural characterization of Ba(Ln(2/3)(III)B(1/3)(VI))O-3 (Ln(III) = Dy, Gd, and Sm; B-VI = Mo or W) complex perovskites AB - We describe in this work the synthesis and crystal structure of five rare earth and Mo(VI) or W(VI) containing complex perovskites. The compounds studied are Ba(Dy2/3Mo1/3)O-3, Ba(Dy2/3W1/3)O-3, Ba(Gd2/3Mo1/3)O-3, Ba(Gd2/3W1/3)O-3 and Ba(Sm2/3W1/3)O-3 and were prepared starting from solutions, by the polymeric precursors method. Structural characterization by HREM, SAED and powder XRD revealed the five compounds to be ordered cubic perovskites, SG Fm-3m (225), with a cell parameter double of that of a simple perovskite cell and increasing as the size of the trivalent lanthanide ion increases (Dy < Gd < Sm). (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Coahuila MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000186126600022 L2 - complex perovskites;tungsten;molybdenum;lanthanides;SAED;HREM;XRD;IONIC-RADII SO - Journal of Solid State Chemistry 2003 ;175(2):299-305 8036 UI - 7811 AU - Fuentes AF AU - Hernandez-Ibarra O AU - Mendoza-Suarez G AU - Escalante-Garcia JI AU - Boulahya K AU - Amador U AD - CINVESTAV, IPN, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoUniv Complutense Madrid, Fac Ciencias Quim, Dept Quim Inorgan, E-28040 Madrid, SpainUniv San Pablo, CEU, Dept CC Quim, Fac Ciencias Expt & Salud, Madrid 28668, SpainFuentes, AF, CINVESTAV, IPN, Unidad Saltillo, Apartado Postal 663, Saltillo 25000, Coahuila, Mexico TI - Structural analysis of several W(VI) and Mo(VI) complex perovskites prepared by the polymeric precursors method AB - We describe in this work the synthesis by the Pechini method of five Mo(VI)- and W(VI)-containing complex perovskites and their structural characterisation by HREM and XRD. The compounds studied, Ba(B'B-2/3"(1/3))O-3 (B'= In and Y; B" = W and Mo) and Sr(In2/3W1/3)O-3, were obtained after firing the precursor powders for 8 h at 1200degreesC. Thermal analysis showed that the formation mechanism of the five perovskites is similar and implies the formation of barium carbonate and barium tungstates or molybdates of different stoichiometries as intermediate phases. Interesting enough, these similar mechanisms yield to materials of a quite different structure. Indeed, Ba(In2/3MO1/3)O-3 and Sr(In2/3W1/3)O-3 were found to be disordered perovskites (unit cells: a(p) x a(p) x a(p) and root2a(p) x root2a(p) x 2a(p), respectively); on the other hand, two phases coexist in the sample Ba(In2/3W1/3)O-3 at the synthesis conditions: an ordered predominant phase (unit cell: 2ap x 2ap x 2ap) and, as a minor phase, a disordered perovskite (unit cell: ap x ap x ap). Finally, the two yttrium-containing compounds were found to be ordered perovskites (2a(p) x 2a(p) x 2a(p)). (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Coahuila MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000184516000008 L2 - complex perovskites;order disorder;HREM;tungsten (VI);molybdenum (VI);MIXED-OXIDE; IONIC-RADII SO - Journal of Solid State Chemistry 2003 ;173(2):319-327 8037 UI - 6802 AU - Fujita H AU - Minagawa M AD - Inst Nacl Antropol & Hist, BCS, Mexico City, DF, MexicoHokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 060, Japan TI - Paleodiet reconstruction of prehistoric humans in the Cape region of Southern Baja California based on carbon and nitrogen isotope analysis MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Meeting Abstract AV - English IS - 0016-7037 UR - ISI:000185517600215 SO - Geochimica et Cosmochimica Acta 2003 ;67(18):A111-A111 8038 UI - 7514 AU - Fukuyama E AU - Mikumo T AU - Olsen KB AD - Natl Res Inst Earth Sci & Disaster Prevent, Tsukuba, Ibaraki 3050006, JapanNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif Santa Barbara, Inst Crustal Studies, Santa Barbara, CA 93106, USAFukuyama, E, Natl Res Inst Earth Sci & Disaster Prevent, Tsukuba, Ibaraki 3050006, Japan TI - Estimation of the critical slip-weakening distance: Theoretical background AB - It has been shown that a trade-off exists between estimates of the breakdown strength drop and the critical slip-weakening distance (e.g., Guatteri and Spudich, 2000). For this reason, only the fracture energy, proportional to these two parameters, may be estimated from waveform modeling. However, Mikumo et al. (2003) proposed a new technique to estimate the slip-weakening distance of earthquakes, separate from the fracture energy. For this method to be valid, the peak slip-velocity time must be close to the stress breakdown time. Here we explain the theoretical background of this assumption and clarify the limitations of this technique using numerical simulations based on the boundary integral equation method. The theoretical analysis using the boundary integral equation and some numerical tests indicates that a rather smooth rupture process and relatively sharp change in stress at the stress breakdown time in the slip-weakening curve ensure the validity of the method MH - Japan MH - Mexico|Distrito Federal MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000185322700030 L2 - RUPTURE PROPAGATION; DYNAMIC PROPAGATION; PLANAR FAULT; FRICTION LAW; NUCLEATION; STRAIN; CRACK; SURFACES; FAILURE; STRESS SO - Bulletin of the Seismological Society of America 2003 ;93(4):1835-1840 8039 UI - 8219 AU - Fuller M AU - Molina-Garza R AU - Antretter M AU - Lichowski F AD - Univ Hawaii, HIGP SOEST, Honolulu, HI 96822, USAUnidad Ciencias Tierra, Juriquilla, Queretaro, MexicoUniv Munich, Inst Pure & Appl Geophys, D-80333 Munich, GermanyUniv Kiel, Geomar Res Ctr Marine Geosci, D-24148 Kiel, GermanyFuller, M, Univ Hawaii, HIGP SOEST, Honolulu, HI 96822, USA TI - Magnetostratigraphy of the Plio-Pleistocene carbonate section of the Great Australian Bight AB - ODP Leg 182 drilled two north-south transects in the western Great Australian Bight close to longitude 128degreesE. These transects penetrated a remarkably thick section of uppermost Pliocene and Pleistocene carbonate sediments, which are separated from Miocene sections by a major hiatus. In the eastern transect, at sites 1129, 1131 and 1127, the Brunhes-Matuyama boundary (onset of C1n) was found at 343 m, between 280 and 300 m, and at 343 m below the sea floor, respectively. In the western transect, at sites 1132 and 1130, it was found between 170 and 181 m, and at 200 m, respectively. Within the Brunhes chron, inclination and intensity fluctuations and correlations between susceptibility and standard delta(18)O records were used to give age-depth relations. These age relations from the palaeomagnetics are broadly consistent with the biostratigraphy and the delta(18)O results from Leg 182, but do not provide an entirely independent dataset. Rock magnetism stratigraphy at site 1131 revealed the principal bryozoan buildup to be at the time of the last glacial lowstand, as suggested by previous workers. At all sites the sedimentation rate increases from the basal unconformity up into the thick Upper Pleistocene section. In the western transect there appears to be a partial record of most of the Late Pliocene and Early Pleistocene chron boundaries (C1r1n to C2An3n) in a condensed section, but in the eastern transect only the Jaramillo (C1r1n) is observed MH - Germany MH - Mexico|Queretaro MH - USA PB - CARLTON: BLACKWELL PUBLISHING ASIA RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0812-0099 UR - ISI:000183517000011 L2 - cool-water carbonates;Great Australian Bight;magnetostratigraphy;palaeoclimatology;Pleistocene;Pliocene;SEDIMENTS SO - Australian Journal of Earth Sciences 2003 ;50(3):447-466 8040 UI - 8102 AU - Funes S AU - Davidson E AU - Reyes-Prieto A AU - Magallon S AU - Herion P AU - King MP AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoThomas Jefferson Univ, Dept Mol Pharmacol & Biochem, Philadelphia, PA 19107, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoFunes, S, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, Mexico TI - Response to comment on"A green algal apicoplast ancestor" MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000183914700021 L2 - CYTOCHROME-C-OXIDASE; MITOCHONDRIAL GENOME; CHLAMYDOMONAD ALGAE; COMPLETE SEQUENCE; GENE; SUBUNIT; DNA SO - Science 2003 ;301(5629): 8041 UI - 6163 AU - Gaal I AU - Jarasi I AU - Luca F AD - Debrecen Univ Med, Math Inst, H-4010 Debrecen, HungaryUNAM, Math Inst, Morelia 58089, Michoacan, MexicoGaal, I, Debrecen Univ Med, Math Inst, Pf 12, H-4010 Debrecen, Hungary TI - A remark on prime divisors of lengths of sides of Heron triangles AB - A Heron triangle is a triangle having the property that the lengths of its sides as well as its area are positive integers. Let P be a fixed set of primes; let S denote the set of integers divisible only by primes in P. We prove that there are only finitely many Heron triangles whose sides a, b, c is an element of S and are reduced, that is gcd(a,b,c) = 1. If P contains only one prime equivalent to 1 (mod 4), then all these triangles can be effectively determined. in case P = {2, 3, 5, 7 11}, all such triangles are explicitly given MH - Hungary MH - Mexico|Michoacan PB - NATICK: A K PETERS LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1058-6458 UR - ISI:000189227300005 L2 - Heron triangle;S-unit equation;reduction;(AB+1)(BC+1)(CA+1); INTEGERS SO - Experimental Mathematics 2003 ;12(3):303-310 8042 UI - 7029 AU - Gadea-Girones R AU - Ramirez-Agundis A AU - Cerda-Boluda J AU - Colom-Palero R AD - Univ Politecn Valencia, Dept Elect Engn, Valencia 46020, SpainInst Tecnol Celaya, Dept Elect Engn, Mexico City 38010, DF, MexicoGadea-Girones, R, Univ Politecn Valencia, Dept Elect Engn, Camino Vera S-N, Valencia 46020, Spain TI - FPGA implementation of adaptive non-linear predictors for video compression AB - The paper describes the implementation of a systolic array for a nonlinear predictor for image compression. We can implement very large interconnection layers by using large Xilinx and Altera devices with embedded memories and multipliers alongside the projection used in the systolic architecture. These physical and architectural features create a reusable, flexible, and fast method of designing a complete ANN (Artificial Neural Networks) on FPGAs. Our predictor, a MLP (Multilayer Perceptron) with the topology 12-10-1 and with training on the fly, works, both in recall and learning modes, with a throughput of 50 MHz, reaching the necessary speed for real-time training in video applications MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000186329700109 SO - Field-Programmable Logic and Applications, Proceedings 2003 ;2778():1016-1019 8043 UI - 6294 AU - gado-Escueta A AU - Suzuki T AU - Medina MT AU - Alonso ME AU - Morita R AU - Bai DS AU - Inoue Y AU - Osawa M AU - Kaneko S AU - Oguni H AU - Yamakawa K AD - Univ Calif Los Angeles, Sch Med, Comprehens Epilepsy Program, Epilepsy Genet Genom Labs, Los Angeles, CA 90024, USAVA GLAHS, W Los Angeles Epilepsy Ctr Excellence, Los Angeles, CA, USARIKKEN, Brain Sci Inst, Neurogenet Lab, Wako, Saitama, JapanNatl Autonomous Univ, Tegucigalpa, HondurasNatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoShizuoka Higashi Hosp, Natl Epilepsy Ctr, Shizuoka, JapanTokyo Womens Med Univ, Dept Pediat, Tokyo, JapanHirosaki Univ, Sch Med, Dept Neuropsychiat, Hirosaki, Aomori, Japan TI - An update on the genetics of juvenile myoclonic epilepsy MH - Honduras MH - Japan MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000187636400080 SO - Epilepsia 2003 ;44():21-21 8044 UI - 6932 AU - gado-Escueta AV AU - Perez-Gosiengfiao KB AU - Bai DS AU - Bailey J AU - Medina MT AU - Morita R AU - Suzuki T AU - Ganesh S AU - Sugimoto T AU - Yamakawa K AU - Ochoa A AU - Jara-Prado A AU - Rasmussen A AU - Ramos-Peek J AU - Cordova S AU - Rubio-Donnadieu F AU - Alonso ME AD - Univ Calif Los Angeles, Sch Med, VA Med Ctr,Epilepsy Genet Genom Lab, Comprehens Epilepsy Program, Los Angeles, CA 90073, USAUniv Calif Los Angeles, VA GLAHS Epilepsy Ctr Excellence, Los Angeles, CA, USAUniv Calif Los Angeles, Inst Neuropsychiat, Div Stat Genet, Los Angeles, CA 90024, USANatl Autonomous Univ, Tegucipalpa, HondurasRIKEN, Inst Phys & Chem Res, Neurogenet Lab, Tokyo, JapanNatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoDelgado-Escueta, AV, Univ Calif Los Angeles, Sch Med, VA Med Ctr,Epilepsy Genet Genom Lab, Comprehens Epilepsy Program, 11301 Wilshire Blvd,Bldg 500,Rm 340, Los Angeles, CA 90073 USA TI - Recent developments in the quest for myoclonic epilepsy genes AB - Understanding the latest advances in the molecular Genetics of the epilepsies is important, as it provides a basis for comprehending the new practice of epileptology. Epilepsies have traditionally been classified and subtyped on the basis of clinical and neurophysiologic concepts. However, the complexity and variability of phenotypes and overlapping clinical features limit the resolution of phenotype-based classification and confound epilepsy nosology. Identification of tightly linked epilepsy DNA markers and discover), of epilepsy-causing mutations provide a basis for refining the classification of epilepsies. Recent discoveries regarding the genetics surrounding certain epilepsy types (including Lafora's progressive myoclonic epilepsy, the severe myoclonic epilepsy of infancy of Dravet, and idiopathic generalized epilepsies) may be the beginning of a better understanding of how rare Mendelian epilepsy genes and their genetic architecture can explain some complexities of the common epilepsies MH - USA MH - Honduras MH - Japan MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 4 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0013-9580 UR - ISI:000186520500004 L2 - epilepsy;myoclonus;genetics;FEBRILE SEIZURES PLUS; IDIOPATHIC GENERALIZED EPILEPSIES; POTASSIUM CHANNEL GENE; SUSCEPTIBILITY LOCUS; MISSENSE MUTATION; SODIUM-CHANNEL; LAFORA-DISEASE; EPM2A GENE; HLA REGION; LINKAGE SO - Epilepsia 2003 ;44():13-26 8045 UI - 8645 AU - gado-Vasallo O AU - Pena JL AU - Martinez ESM AU - Calderon A AU - Rodriguez GP AU - Fonseca MRJ AU - Marin E AD - Univ Havana, Fac Fis, IMRE, Havana 10400, CubaIPN, CICATA, Unidad Altamira, Altamira 89600, Tamaulipas, MexicoIPN, CICATA, Unidad Legaria, Mexico City 11500, DF, MexicoUFPS Dept Fis, Cucuta, Norte De Santan, ColombiaMarin, E, Univ Havana, Fac Fis, IMRE, San Lazaro Y L, Havana 10400, Cuba TI - Photoacoustic determination of iron in corn meal AB - We report here on the use of the photoacoustic technique for the determination of low concentrations of total iron in corn meal samples. The determination of this element in food is of considerable interest because several foods are currently enriched with it at proper levels in order to increase the resistance of people, after consumation, to several diseases, such as anemia. The proposed technique is based on an open photoacoustic cell configuration in conjunction with a suitable colorimetric method. We applied it to a measurement of the total iron concentration in corn meal samples. The results agree very well with those obtained using a conventional spectrophotometric method, showing the possibilities of new experimental methodologies based on photothermal methods to perform this kind of study, with the advantage of a higher sensitivity and increment of the range of appreciable absorbance MH - Colombia MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000182434800020 L2 - LIQUIDS SO - Analytical Sciences 2003 ;19(4):599-602 8046 UI - 6993 AU - Gaggero-Sager LM AU - Mora-Ramos ME AU - Velasco VR AD - CSIC, Inst Ciencia Mat Madrid, Madrid 28049, SpainUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoVelasco, VR, CSIC, Inst Ciencia Mat Madrid, Teoria Mat Condensada, Madrid 28049, Spain TI - A model for single heterostructure field effect transistors AB - Single heterostructure field effect transistors are studied within a proposed analytical model for the heterostructure conduction band potential profile. An expression for the bias potential closing the conduction channel between drain and source is derived as a function of growth parameters and bias. In particular we study a field effect transistor based on AlxGa1-xN/GaN. The quantum well potential is modelled along the lines of the local density Thomas-Fermi approximation with the inclusion of exchange effects. Recent experimental results on two-dimensional electron gas density in this kind of systems are explained. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000186454600005 L2 - heterojunctions;field effect;growth;interface states;2-DIMENSIONAL ELECTRON-GAS; ALGAN/GAN HETEROSTRUCTURES; VOLTAGE; STATES; CAPACITANCE SO - Surface Science 2003 ;546(1):39-46 8047 UI - 8601 AU - Galfione M AU - Luo WP AU - Kim J AU - Hawke D AU - Kobayashi R AU - Clapp C AU - Yu-Lee LY AU - Lin SH AD - Univ Texas, MD Anderson Canc Ctr, Dept Mol Pathol, Houston, TX 77030, USAUniv Nacl Autonoma Mexico, Ctr Neurobiol, Mexico City 04510, DF, MexicoBaylor Coll Med, Dept Med, Houston, TX 77030, USALin, SH, Univ Texas, MD Anderson Canc Ctr, Dept Mol Pathol, 1515 Holcombe Blvd, Houston, TX 77030 USA TI - Expression and purification of the angiogenesis inhibitor 16-kDa prolactin fragment from insect cells AB - The 16-kDa fragment of prolactin (16-kDa PRL), derived from proteolytic cleavage of 23-kDa PRL, was shown to have antiangiogenic activity. Previous studies have shown that recombinant 16-kDa PRL produced from bacteria often contained endotoxins, which are cytotoxic to endothelial cells, and varied in its biological activity due to changes in its refolding from inclusion bodies. These problems limited the use of recombinant 16-kDa PRL. To improve the generation of recombinant 16-kDa PRL, we expressed 16-kDa PRL in Sf9 insect cells using a baculoviral expression system. The signal sequence of the human PRL gene and codons for seven histidines were added to the N- and C-termini, respectively, of the 16-kDa PRL cDNA construct. Recombinant 16-kDa PRL was detected in both the cell pellet and the medium. About 0.28 mg purified protein was isolated from the cell pellet of 4 x 107 infected cells using nickel affinity chromatography. Sixteen kilodalton PRL was posttranslationally modified with apparent molecular weights of 16 and 18 kDa on SDS PAGE. The level of 18-kDa protein was significantly reduced after digestion with peptidyl-N-glycosidase, suggesting that the heterogeneity was due to glycosylation of 16-kDa PRL. N-terminal sequence analysis confirmed the fact that both proteins were human 16-kDa PRL and the signal sequences were cleaved at the same position as that of human PRL. Consistent with its role as an angiogenesis inhibitor, purified recombinant 16-kDa PRL inhibits the proliferation of endothelial cells with a potency similar to that previously reported for the protein generated in Escherichia coli. This 16-kDa PRL expressed in Sf9 cells is a useful reagent for functional studies and for the purification and identification of its receptor. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1046-5928 UR - ISI:000182556100007 L2 - CAPILLARY ENDOTHELIAL-CELLS; FIBROBLAST GROWTH-FACTOR; VENTRAL PROSTATE-GLAND; N-TERMINAL FRAGMENT; RAT PROLACTIN; MAMMARY-GLAND; SUBCELLULAR-FRACTIONS; ACTIVATION; CLEAVAGE; PROTEIN SO - Protein Expression and Purification 2003 ;28(2):252-258 8048 UI - 7827 AU - Galicia-Luna LA AU - Richon D AU - de Loos TW AD - Inst Politecn Nacl, ESIQIE, Mexico City 07738, DF, MexicoEcole Mines, Paris, FranceDelft Univ Technol, NL-2600 AA Delft, NetherlandsGalicia-Luna, LA, Inst Politecn Nacl, ESIQIE, Mexico City 07738, DF, Mexico TI - Fifth International Symposium of the ESIQIE, 29-31 May 2002, Mexico City - Preface MH - France MH - Mexico|Distrito Federal MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Editorial Material AV - English IS - 0378-3812 UR - ISI:000184404300001 SO - Fluid Phase Equilibria 2003 ;210(2):145-146 8049 UI - 8718 AU - Galie N AU - Hinderliter AL AU - Torbicki A AU - Fourme T AU - Simonneau G AU - Pulido T AU - Espinola-Zavaleta N AU - Rocchi G AU - Manes A AU - Frantz R AU - Kurzyna M AU - Nagueh SF AU - Barst R AU - Channick R AU - Dujardin K AU - Kronenberg A AU - Leconte I AU - Rainisio M AU - Rubin L AD - Univ Bologna, Ist Cardiol, I-40138 Bologna, ItalyUniv N Carolina, Dept Med, Chapel Hill, NC 27515, USAInst TB & Lung Dis, Dept Chest Med, Warsaw, PolandUniv Paris Sud, Div Pulm & Crit Care Med, Paris, FranceInst Nacl Cardiol, Mexico City, DF, MexicoMayo Clin, Dept Cardiol, Rochester, MN, USABaylor Coll Med, Houston, TX 77030, USAMethodist Hosp, Houston, TX 77030, USAColumbia Univ, Coll Phys & Surg, Dept Pediat, New York, NY 10027, USAUniv Calif San Diego, Div Pulm & Crit Care Med, San Diego, CA 92103, USAUniv Hosp Gasthuisberg, Dept Cardiol, B-3000 Louvain, BelgiumActel Ltd, Allschwil, SwitzerlandGalie, N, Univ Bologna, Ist Cardiol, Via Massarenti 9, I-40138 Bologna, Italy TI - Effects of the oral endothelin-receptor antagonist bosentan on echocardiographic and Doppler measures in patients with pulmonary arterial hypertension AB - OBJECTIVES The purpose of this study was to investigate the effects of bosentan (125 or 250 mg twice daily) on echocardiographic and Doppler variables in 85 patients with World Health Organization class III or IV pulmonary arterial hypertension (PAH). BACKGROUND Bosentan, an orally active dual endothelin-receptor antagonist, improves symptoms, exercise capacity, and hemodynamics in patients with PAH. METHODS Patients had primary pulmonary hypertension (84%) or PAH associated with connective tissue disease. Of these, 29 patients received placebo and 56 received bosentan (1:2 randomization). Six-minute walk tests and echocardiograms were performed at baseline and after 16 weeks of treatment. RESULTS Baseline characteristics were similar in the placebo and bosentan groups, and echocardiographic and Doppler findings were consistent with marked abnormalities of right ventricular (RV) and left ventricular (LV) structure and function that were due to PAH. The treatment effect on 6-min walking distance was 37 in in favor of bosentan (p = 0.036). Treatment effects of bosentan compared with placebo on other parameters were as follows: Doppler-derived cardiac index = +0.4 1/min/m(2) (p = 0.007), LV early diastolic filling velocity = +10.5 cm/s (p = 0.003), LV end-diastolic area = +4.2 cm(2) (p = 0.003), LV systolic eccentricity index = -0.12 (p = 0.047), RV end-systolic area = -2.3 cm(2) (p = 0.057), RV.LV diastolic areas ratio = -0.64 (p = 0.007), Doppler RV index = -0.06 (p = 0.03), and percentage of patients with an,improvement in pericardial. effusion score = 17% (p = 0.05). CONCLUSIONS Bosentan improves RV systolic function and LV early diastolic filling and leads to a decrease in RV dilation and an increase in LV size in patients with PAH. (C) 2003 by the American College of Cardiology Foundation MH - Belgium MH - France MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Switzerland MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 94 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0735-1097 UR - ISI:000182177300021 L2 - TRICUSPID REGURGITATION VELOCITY; SINGLE-LUNG TRANSPLANTATION; RIGHT-VENTRICULAR-FUNCTION; PROGNOSTIC-SIGNIFICANCE; 6-MINUTE WALK; EXERCISE; THROMBOENDARTERECTOMY; IMPROVEMENT; OVERLOAD; PRESSURE SO - Journal of the American College of Cardiology 2003 ;41(8):1380-1386 8050 UI - 7414 AU - Galina MA AU - Perez-Gil F AU - Ortiz RMA AU - Hummel JD AU - Orskov RE AD - Univ Nacl Autonoma Mexico, Dept Ciencias Pecuarias, Fac Estudios Super Cuautitlan, Teoloyucan 54000, CP, MexicoMacaulay Res Inst, Aberdeen, ScotlandUniv Aberdeen, Aberdeen, ScotlandInst Nacl Nutr Salvador Zubiran, Tlalpan, MexicoUniv Colima, Colima, MexicoGalina, MA, Univ Nacl Autonoma Mexico, Dept Ciencias Pecuarias, Fac Estudios Super Cuautitlan, Campo 4,Km 3 5 Carr, Teoloyucan 54000, CP, Mexico TI - Effect of slow release urea supplementation on fattening of steers fed sugar cane tops (Saccharum officinarum) and maize (Zea mays): ruminal fermentation, feed intake and digestibility AB - A total of 60 Zebu steers were fattened for 120 days with feed supplemented with slow release urea, sugar cane tops (Saccharum officinarum) and maize (Zea mays). The treatments were as follows: treatment I (T1), fed 100% sugar cane tops (SCT) (n = 20; 257+/-7 kg BW); treatment 2 (T2), diet of SCT supplemented with 1.8 kg dry matter (DM) of slow release urea supplement (SRUS) (n = 20; 254+/-4 kg BW); treatment 3 (T3), fed SCT:maize (40:60%) supplemented with 1.8 kg DM SRUS (n = 20; 255+/-5 kg BW). Voluntary dry matter intake (VDMI), organic matter intake (OMI), rumen digestion, rate of passage, rumen concentration of NH3, volatile fatty acids (VFAs), apparent digestibility, ruminal pH, total fermentable carbohydrates and weight gains were measured. Ruminal kinetics were determined in four adult ruminal cannulated steers. At all times, fibrous forages were available and exceeded VDMI. BW gain by T1 was 125 g/day compared to 708 g/day for T2 and 641 g/day for T3 (P < 0.05). Total forage intake was similar for T1 and T3 but higher in T2 (P < 0.05). DMI varied from 5.831 kg/day for T1 to 8.240 for T2 and 7.874 for T3 (P < 0.001). VDMI and apparent digestibility of DM and organic matter (010) was better, the acetate molar proportions were lower and the feed intake was greater in both SRUS diets. Rumen pH rose to 6.83 and 6.73 by 2 It and stayed above 6.5 during the 12 h of sampling when SRUS was the only supplement, and was 6.3 when maize was added. In SCT steers, ruminal pH decreased to 6.16 by 6 h and rose again to 6.42 after 12 h. Ammonia concentration and digestion of potentially digestible and indigestible fractions were significantly augmented by SRUS (P < 0.05). Ammonia was significantly lower in T1 (P < 0.05). N intake was increased (P < 0.05) in T2 (146 g/day) versus T1 (37 g/day), but declined to 118 g/day in T3. In vivo nitrogen digestibility was different (P < 0.05) among the three diets, being 46.63, 74.16, and 56.63% in T1, T2 and T3, respectively. In vivo DM and OM digestibility, for cellulose and hemicellulose, was similar in T2 and T3 groups but different in T1 (P < 0.05). NDF digestibility was higher (P < 0.05) for T3 (66.17%), similar in T2 (63.14%), but lower in TI (52.41%) (P < 0.01). The amount of situ DM digested was similar in T2 and T3 diets at 9, 12, 24 and 48 h, but less was digested in T1. NDF digestion rate (k(d)) was similar among SRUS (0.039 and 0.037) diets, but different in T1 (0.023) (P < 0.05). Digestion rate for cellulose and hemicellulose was similar to previous results, being similar for SRUS diets but different in SCT treatment (P < 0.01). NDF (Neutral Detergent Fibre) passage (k(p)) was different (P < 0.05) between diets (0.061/h for T1; 0.081/h for T2 and 0.079/h for T3). True digestibility was higher (P < 0.05) in T2 (48.14%) and T3 (46.24%) compared with T1 (36.22). Digestion rate was higher (P < 0.05) for T2 (0.039) and T3 (0.037) as compared to T1 (0.023). True digestibility in T2 (48.14) and T3 (46.24) was higher (P < 0.05) than in T1 (36.22%). The half-time (t(1/2)) disappearance for hemicellulose was higher (P < 0.05) for T2 (21.14 h) and T3 (19.34 h) as compared to T1 (14.54 h). Fattening in 120 days averaged 125 g/day (&PLUSMN;31) for T1 compared to 708 g/day (&PLUSMN;150) for T2 and 641 g/day (&PLUSMN;57) for T3 (P < 0.05). Acetic acid production increased significantly (mM/l) in the T1 diet compared with the T2 and T3 diets (P < 0.05). Propionic acid kinetics showed a significant increase (P < 0.05) at time of sampling in T3 diet. Supplementation of high fiber di Utilization of fibrous forages by steers was significantly higher (P < 0.05) for SRUS diets. © 2003 Elsevier B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0301-6226 UR - ISI:000185540500001 L2 - beef cattle fattening;non-protein nitrogen supplementation;fermentation;maize;nutrition;corn stubble;sugar tops;NONPROTEIN NITROGEN; FIBER DIGESTION; RUMEN; ROUGHAGES; CATTLE; AMMONIA; DIETS; DEGRADATION; EMPHASIS; SYSTEMS SO - Livestock Production Science 2003 ;83(1):1-11 8051 UI - 6769 AU - Gallardo J AU - Alegret S AU - de Roman MA AU - Munoz R AU - Hernandez PR AU - Leija L AU - del Valle M AD - CINVESTAV, Bioelect Sect, Mexico City, DF, Mexicodel Valle, M, Univ Autonoma Barcelona, Sensors & Biosensors Grp, Dept Quim, Edifici Cn, Bellaterra 08193, Spain TI - Determination of ammonium ion employing an electronic tongue based on potentiometric sensors AB - A method for determining ammonium ion concentration from complex aqueous samples is presented in this work. It does not need to eliminate chemical interferences, mainly sodium and potassium, because an array of potentiometric sensors with intrinsic responses is used. The measurements taken from the array are processed with a multicomponent data treatment. This approach is already known as electronic tongue. Multivariable calibration was implemented with an artificial neural network, trained under the rules of the Bayesian]regularization. The developed system has been applied to water samples from rivers and wastewaters with ammonium content in the range 1 x 10(-4) -5 x 10(-2) mol L-1. Results are similar to those obtained with other reference methods MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2719 UR - ISI:000187022000001 L2 - electronic tongue;sensor array;Bayesian regularization;neural networks;ion selective electrode array;SELECTIVE ELECTRODES; PATTERN-RECOGNITION; CHEMISTRY; ARRAYS SO - Analytical Letters 2003 ;36(14):2893-2908 8052 UI - 7373 AU - Gallardo J AU - Alegret S AU - Munoz R AU - De-Roman M AU - Leija L AU - Hernandez PR AU - del Valle M AD - Autonomous Univ Barcelona, Dept Chem, Sensors & Biosensors Grp, Bellaterra 08193, Catalonia, SpainCINVESTAV, Dept Elect Engn, Bioelect Sect, Mexico City 14000, DF, Mexicodel Valle, M, Autonomous Univ Barcelona, Dept Chem, Sensors & Biosensors Grp, Edifici Cn, Bellaterra 08193, Catalonia, Spain TI - An electronic tongue using potentiometric all-solid-state PVC-membrane sensors for the simultaneous quantification of ammonium and potassium ions in water AB - The simultaneous determination of NH4+ and K+ in solution has been attempted using a potentiometric sensor array and multivariate calibration. The sensors used are rather non-specific and of all-solid-state type, employing polymeric (PVC) membranes. The subsequent data processing is based on the use of a multilayer artificial neural network (ANN). This approach is given the name 'electronic tongue' because it mimics the sense of taste in animals. The sensors incorporate, as recognition elements, neutral carriers belonging to the family of the ionophoric antibiotics. In this work the ANN type is optimized by studying its topology, the training algorithm, and the transfer functions. Also, different pretreatments of the starting data are evaluated. The chosen ANN is formed by 8 input neurons, 20 neurons in the hidden layer and 2 neurons in the output layer. The transfer function selected for the hidden layer was sigmoidal and linear for the output layer. It is also recommended to scale the starting data before training. A correct fit for the test data set is obtained when it is trained with the Bayesian regularization algorithm. The viability for the determination of ammonium and potassium ions in synthetic samples was evaluated; cumulative prediction errors of approximately 1% (relative values) were obtained. These results were comparable with those obtained with a generalized regression ANN as a reference algorithm. In a final application, results close to the expected values were obtained for the two considered ions, with concentrations between 0 and 40 mmol L-1 MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 27 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1618-2642 UR - ISI:000185649700005 L2 - sensor array;PVC membrane;ion-selective electrode;artificial neural networks;ammonium;potassium;SELECTIVE ELECTRODES; NEURAL-NETWORK; MULTICOMPONENT ANALYSIS; ARRAYS; NOSE; REGRESSION; MONENSIN; SODIUM SO - Analytical and Bioanalytical Chemistry 2003 ;377(2):248-256 8053 UI - 7410 AU - Gallardo J AU - Rico JM AU - Frisoli A AU - Checcacci D AU - Bergamasco M AD - Inst Tecnol Celaya, Dept Ingn Mecan, Celaya 38010, Gto, MexicoScuola Super Sant Anna, PERCRO, I-56025 Pisa, ItalyGallardo, J, Inst Tecnol Celaya, Dept Ingn Mecan, Av Tecnol & Garcia Cubas, Celaya 38010, Gto, Mexico TI - Dynamics of parallel manipulators by means of screw theory AB - An approach to the dynamic analysis of parallel manipulators is presented. The proposed method, based on the theory of screws and on the principle of virtual work, allows a straightforward calculation of the actuator forces as a function of the external applied forces and the imposed trajectory. In order to show the generality of such a methodology, two case studies are developed, a 2-DOF parallel spherical mechanism and a Gough-Stewart platform. (C) 2003 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 0094-114X UR - ISI:000185500000001 L2 - parallel manipulators;virtual work;Klein form;kinematics;dynamics;CLOSED CHAINS SO - Mechanism and Machine Theory 2003 ;38(11):1113-1131 8054 UI - 8047 AU - Gallardo LA AU - Meju MA AD - Univ Lancaster, Dept Environm Sci, Lancaster LA1 4YQ, EnglandCICESE, Div Ciencias Tierra, Mexico City, DF, MexicoGallardo, LA, Univ Lancaster, Dept Environm Sci, Lancaster LA1 4YQ, England TI - Characterization of heterogeneous near-surface materials by joint 2D inversion of dc resistivity and seismic data AB - [1] We have developed a robust 2D joint inversion scheme incorporating the new concept of cross-gradients of electrical resistivity and seismic velocity as constraints so as to investigate more precisely the resistivity-velocity relationships in complex near-surface environments. The results of joint inversion of dc resistivity and seismic traveltime data from collocated experiments suggest that one can distinguish between different types or facies of unconsolidated and consolidated materials, refining a previously proposed resistivity-velocity interrelationship derived from separate inversions of the respective data sets. A consistent interpretive structural model can be obtained from the joint inversion models MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 12 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000184002100002 L2 - TRANSFORMATION SO - Geophysical Research Letters 2003 ;30(13): 8055 UI - 8076 AU - Gallegos-Arreola MP AU - rnaud-Lopez L AU - Figuera LE AU - Jaramillo TSB AU - Rangel-Villalobos H AU - Thomatsu S AU - Zuniga-Gonzalez G AD - CIBO, Div Mol Med, Guadalajara 44340, Jalisco, MexicoCIBO, Div Genet, Guadalajara, Jalisco, MexicoHosp Especialidades Ctr Med La Raza, IMSS, CMNO, Serv Urgencias, Guadalajara, Jalisco, MexicoCUCI, UdeG, Mol Biol Lab, Guadalajara, Jalisco, MexicoSt Louis Univ, Sch Med, EA Doisy Dept Biochem & Mol Biol, St Louis, MO 63103, USAGallegos-Arreola, MP, CIBO, Div Mol Med, Sierra Mojada 800,Col Independencia,I-3838, Guadalajara 44340, Jalisco, Mexico TI - Mucopolysaccharidosis I: a comparative study of haplotypes Eco47III-NspI sites frequencies in patients and healthy subjects of Mexican population AB - Background. - Mucopolysaccharidosis I (MPS-I) is an autosomal recessive disorder, which is caused by mutations in the IDUA gene. It induces the deficiency of glycosidase alpha-L-duronidase. The enzyme that is required for the degradation of heparan and dermatan sulfate. This disorder expresses a wide range of clinical symptoms (severe mental retardation, skeletal deformations, hepatosplenomegaly, corneal clouding and mild visceral organ involvement). In the present paper, we report the frequencies of haplotypes of the Eco47III-NspI sites, in the IDUA gene, in Mexican healthy and in MPS-I individuals. Methods. - Eco47III and NspI intragenic polymorphisms in IDUA gene were studied in 262 (524 chromosomes) Mexican healthy subjects and in 53 (106 chromosomes) MPS-I patients. Results. - The genotypes for IDUA Eco47III and NspI sites in Mexicans were in agreement with Hardy-Weinberg expectations. Allele frequency distributions for individual sites differed (P < 0.05) in both groups. Haplotype Eco47III-NspI frequencies of Mexican MPS-I patients also differed from those of the normal Mexican population. The data provide evidence of linkage disequilibrium, since the MPS-I group constitutes a subset of the Mexican control population. The disequilibrium in Mexican MPS-I patients was defined by an increase in the haplotype A(1)B(2), and deficiency in A(2)B(1), with respect to normal population (P < 0.05). Conclusions. - Our results support that these polymorphisms can be associated to mutations in IDUA gene, which leads to MPS-I in Mexican patients. On the other hand, these polymorphisms can be used to identify heterozygosity when they are informative. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Mexico|Jalisco MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0003-3995 UR - ISI:000183975400002 L2 - IDUA;Eco47III;NspI;Mexico;gene frequencies;mucopolysaccharidosis type;DNA SO - Annales de Genetique 2003 ;46(1):7-10 8056 UI - 8620 AU - Galter J AU - Hurtado F AU - Noy M AU - Perennes S AU - Urrutia J AD - France Telecom, R&D, F-06902 Sophia Antipolis, FranceINRIA UNSA CNRS, Project Mascotte, F-06902 Sophia Antipolis, FranceUniv Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Matemat, Area Invest Cient, Mexico City 04510, DF, MexicoGalter, J, France Telecom, R&D, 2004 Route Lucioles,BP 93, F-06902 Sophia Antipolis, France TI - Simultaneous edge flipping in triangulations AB - We generalize the operation of flipping an edge in a triangulation to that of flipping several edges simultaneously. Our main result is an optimal upper bound on the number of simultaneous flips that are needed to transform a triangulation into another. Our results hold for triangulations of point sets and for polygons MH - France MH - Mexico|Distrito Federal MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0218-1959 UR - ISI:000182497700002 L2 - flips;triangulations;parallelism;meshing SO - International Journal of Computational Geometry & Applications 2003 ;13(2):113-133 8057 UI - 7726 AU - Galvan-Pina VH AU - Galvan-Magana F AU - bitia-Cardenas LAS AU - Gutierrez-Sanchez FJ AU - Rodriguez-Romero J AD - Univ Guadalajara, Ctr Ecol Costera, San Patricio Melaque 48980, Jalisco, MexicoCtr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja Calif Sur, MexicoCtr Invest Biol Noroeste, La Paz 23000, BoliviaCICIMAR, La Paz 23000, Baja Calif Sur, MexicoGalvan-Pina, VH, Univ Guadalajara, Ctr Ecol Costera, Gomez Farias 82, San Patricio Melaque 48980, Jalisco, Mexico TI - Seasonal structure of fish assemblages in rocky and sandy habitats in Bahia de la Paz, Mexico AB - Ecological surveys from several coastal environments in Bahia de La Paz were analysed to determine the seasonal changes in the fish assemblages in the largest bay of the Gulf of California. We identified 58 species from 37 genera and 23 families in seasonal gill net samples were taken over 1 yr. Using the relative abundance index (%N), the most important species were Gerres cinereus, Arius platypogon, Lutjanus guttatus, Haemulon sexfasciatus, Kilphosus elegans, Diapterus peruvianus, Chaetodipterus zonatus, and Nematistius pectoralis. By relative weight (%W) the main species were similar but in a different ranking Kyphosus elegans, L. guttatus, G. cinereus, A. platypogon, Carcharhinus porosus, H. sexfasciatus, and Scomberomorus sierra. Three seasonal species groups were determined and their abundance, richness, and diversity were analyzed. Dissimilarity analysis suggests that were closely three habitats associated with three different fish assemblages inside Bahia de La Paz: (a) an exposed coastal zone with big rocks and sandy beaches; (b) protected coastal estuarine zone with sandy and shallow bottom; and (c) an oceanic island zone with rocky bottom and sandy patches MH - Bolivia MH - Mexico|Baja California Sur MH - Mexico|Jalisco PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000184653100002 L2 - CALIFORNIA; BAY; ABUNDANCE; COMMUNITY; GULF SO - Bulletin of Marine Science 2003 ;72(1):19-35 8058 UI - 6794 AU - Galvan DH AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoGalvan, DH, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Electronic structure calculations for PrFe4P12 filled skutterudite using extended huckel tight-binding method AB - To gain insight into the electronic properties of PrFe4P12 filled skutterudite, band electronic structure calculations, total and projected density of states, crystal orbital overlap population and Mulliken population analysis were performed. The energy bands yield a semi-metallic behavior with a direct gap (at Gamma) of 0.02 eV. Total and Projected Density of States provided information of the contribution from each orbital of each atom to the total Density of States. Moreover, the bonding strength between some atoms within the unit cell was obtained. Mulliken Population Analysis suggests ionic behavior for this filled skutterudite MH - USA MH - Mexico|Baja California PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9792 UR - ISI:000186884100010 L2 - electronic properties;thermoelectric materials;superconductivity;TRANSITION; LAFE4P12; EARTH; SUPERCONDUCTIVITY; CEFE4SB12; YBFE4SB12 SO - International Journal of Modern Physics B 2003 ;17(26):4749-4762 8059 UI - 7067 AU - Galvan DH AU - Li S AU - Yuhasz WM AU - Kim J AU - Maple MB AU - Adem E AD - Univ Calif San Diego, Dept Phys, Inst Pure & Appl Phys Sci, La Jolla, CA 92093, USAElect & Telecommun Res Inst, Basic Res Lab, Taejon 305350, South KoreaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoGalvan, DH, Univ Calif San Diego, Dept Phys, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA TI - Superconductivity of NbSe2 samples subjected to electron irradiation AB - Magnetization measurements on NbSe2 samples subjected to 100, 250, and 500 Mrad of electron irradiation revealed an enhancement in the critical current density J(c) with radiation dosage. This enhancement attained a maximum value with almost double the Jc of the unirradiated material at 500 Mrad. The measured superconducting transition temperature T-c of all the samples did not change as a result of the irradiation. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - South Korea PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000186282800010 L2 - superconductivity;wetting;nanotubes;COLUMNAR DEFECTS; TC; YBA2CU3O7-DELTA; MICROSTRUCTURE; MAGNETIZATION; BOMBARDMENT; IONS SO - Physica C-Superconductivity and Its Applications 2003 ;398(3-4):147-151 8060 UI - 7273 AU - Galvan DH AU - Dilley NR AU - Maple MB AU - Posada-Amarillas A AU - Reyes-Serrato A AU - Samaniego Reyna JC AD - Univ Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093, USAUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoGalvan, DH, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Extended Huckel tight-binding calculations of the electronic structure of YbFe4Sb12, UFe4P12, and ThFe4P12 AB - Calculation of the band structure, total and projected density of states, crystal orbital population analysis (COOP), and Mulliken population analysis were performed for the filled skutterudites YbFe4Sb12, UFe4P12, and ThFe4P12. The calculated energy bands depict a semimetal behavior for YbFe4Sb12 and UFe4P12, and metallic behavior for ThFe4P12. Furthermore, the contributions from each orbital to the total DOS for each compound corroborate these findings. The bonding strength was derived from the COOP analysis between different pairs of atoms, considering nearest neighbor distances between 3.40 and 6.47 Angstrom for YbFe4Sb12, 2.91 and 6.47 Angstrom for UFe4P12, and 2.48 and 5.51 Angstrom for ThFe4P12. Mulliken population analysis suggests ionic behavior for these compounds MH - USA MH - Mexico|Baja California PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000185829300040 L2 - FILLED SKUTTERUDITES; LAFE4P12 STRUCTURE; ANTIMONIDES; TRANSITION; CEFE4SB12 SO - Physical Review B 2003 ;68(11): 8061 UI - 6919 AU - Galvez-Ruiz JC AU - Noth H AU - Flores-Parra A AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyFlores-Parra, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, AP 14-740 CP, Mexico City 07000, DF, Mexico TI - Organometallic aluminum compounds derived from 2-(1,3,5-dithiazinan-5-yl)ethanol ligands(1) AB - The reactions of AIMe(2)Y (Y = Me or Cl) with new ligands 2-(1,3,5-dithiazinan-5-yl)ethanol (1), 2-(1,3,5-dithiazinan-5-yl)-1 -methylethanol (2), and 2-(1,3,5-dithiazinan-5-yl)-1 -phenylethanol (3) are described. The ligands are coordinated to aluminum atoms by nitrogen and oxygen atoms, with a nitrogen based spiranic structure. Equimolar reactions gave dimeric structures bearing pentacoordinated aluminum atoms a(AIMeY)-2-(1,3,5-dithiazinan-5-yl)ethanolates (4-7) as well as monometallic compounds with tetracoordinated aluminum atoms a(AIMeY)-2-(1,3,5-dithiazinan-5-yl)ethanolates (8-9). Reactions with 2 equiv of the aluminum reagents afforded tetracoordinated dialuminum complexes O-(AIMeY)-O-(AIMe(2)y)-2-(1,3,5-dithiazinan-5-yl)ethanolate (10-18). The structures of the new compounds were determined by NMR (H-1,C-13, and Al-27) and complemented by X-ray diffraction of compounds 4, 10, and 16-18. Relevant intermolecular interactions C-(HS)-S-..., C-(HCl)-Cl-..., and C-H(...)pi found in the crystalline network are reported MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000186562900036 L2 - X-RAY-DIFFRACTION; CENTER-DOT-O; N-BORANE; CHLOROBORANE ADDUCTS; HETEROCYCLES; NMR; 1,3,5-HETEROCYCLOHEXANES; REACTIVITY; CRYSTAL SO - Inorganic Chemistry 2003 ;42(23):7569-7578 8062 UI - 8553 AU - Gambi MC AU - van Tussenbroek BI AU - Brearley A AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Cancun 77500, Q Roo, MexicoStaz Zool Anton Dohrn, Lab Ecol Benthos, I-80077 Punta S Pietro, Ischia Napoli, ItalyUniv Western Australia, Sch Plant Biol, Crawley, WA 6009, Australiavan Tussenbroek, BI, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Apdo Postal 1152, Cancun 77500, Q Roo, Mexico TI - Mesofaunal borers in seagrasses: world-wide occurrence and a new record of boring polychaetes in the Mexican Caribbean AB - In the last decade, an increasing number of mesofaunal crustaceans and polychaetes have been reported to bore into seagrass tissues. Crustacean borers have been found in seagrasses from different oceans (Indo-West Pacific, Mediterranean, and Caribbean), but until present, boring polychaetes had only been registered in the Mediterranean. Here, a new record of polychaete borers within sheaths of the seagrass Thalassia testudinum (Banks ex Konig) off the Mexican Caribbean coast (Puerto Morelos) is reported. The polychaetes were found in sheaths of plants collected at two stations in a shallow meadow (3-4 m depth), and except for slight morphological differences, were similar to Lysidice ninetta Andouin and Milne Edwards, Lysidice collaris Grube, and Nematonereis unicornis Grube; taxa previously recorded in sheaths of the Mediterranean seagrass Posidonia oceanica (L.) Delile. A synthesis of present knowledge of fauna burrowing into seagrass tissues, suggests the. existence of specific associations between particular seagrasses and specialized members of crustaceans (orders Isopoda and Tanaidacea) or polychaetes (family: Eunicidae). The boring crustaceans can be classified as mesoherbivores because they consume the living tissues they burrow into. Each species bores into specific tissues which are either leaf blades, leaf sheaths, rhizomes or seeds. The polychaetes, in contrast, bore into the dead sheath tissues which remain attached to the vertical rhizomes after abscission of the green blades, and can thus considered to be detritivores. (C) 2003 Elsevier Science B.V. All rights reserved MH - Australia MH - Italy MH - Mexico|Quintana Roo PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000182701000005 L2 - seagrasses;borers;mesofauna;Polychaeta;Eunicidae;Crustacea;Isopoda;POSIDONIA-OCEANICA; THALASSIA-TESTUDINUM; INVERTEBRATE BORERS; REEF LAGOON; LEAVES; GRASS SO - Aquatic Botany 2003 ;76(1):65-77 8063 UI - 6766 AU - Gamboa-Delgado J AU - Molina-Poveda C AU - Cahu C AD - Fdn CENAIM ESPOL, Guayaquil, EcuadorIFREMER, Ctr Brest, INRA, Unite Mixte Nutr Poisson, Plouzane, FranceGamboa-Delgado, J, Univ Mar, Ap Post 47, Mexico City 70902, DF, Mexico TI - Digestive enzyme activity and food ingesta in juvenile shrimp Litopenaeus vannamei (Boone, 1931) as a function of body weight AB - A study was conducted to evaluate variations of digestive enzyme activities in Litopenaeus vannamei (Boone) reared in commercial ponds under semi-intensive conditions. Shrimp were collected at each body weight increase of 2 g. As the shrimp grew (2-12 g), significant increases in the activities of lipase and chymotrypsin were observed. The total protease activity decreased from 6 g onwards. Trypsin activity showed a peak at 6 g and amylase activity increased two-fold after 2 g. Additionally, the stomach contents were analysed microscopically for shrimp between 2 and 10 g. Plant matter contributed above 30% of the total stomach content in 6-, 8- and 10-g shrimp. Detritus represented 58% and 62% of the total stomach content in 2- and 4-g shrimp, respectively, decreasing to 33-43% at greater shrimp weights. Artificial feed showed a maximum contribution of 20% in 6-g shrimp. The present results show changes in the enzyme activity after the shrimp reach 6 g in body weight, evidenced by a decrease in total protease and an increase in lipase and amylase activities. The amylase/protease ratio was 2.6 in 2-g shrimp and increased steadily to 9.6 in 12-g shrimp. These findings suggest an adaptation of the enzymatic activity to diets with lower protein content as body weight increases, and may be related to the variation of the different items found in the stomach MH - Ecuador MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000187154600005 L2 - shrimp;Litopenaeus vannamei;digestive enzymes;stomach content;semi-intensive culture;SEMI-INTENSIVE CULTURE; PENAEUS-SUBTILIS; WHITE SHRIMP; NE BRAZIL; PROTEIN SO - Aquaculture Research 2003 ;34(15):1403-1411 8064 UI - 7689 AU - Gamboa-Dominguez A AU - Dominguez-Fonseca C AU - Quintanilla-Martinez L AU - Vargas R AU - Reyes-Gutierrez E AU - Luber B AU - Becker KF AU - Becker I AU - Hoefler H AU - Fend F AD - Inst Nacl Ciencias Med SZ, Mexico City, DF, MexicoGSF, Res Ctr Environm & Hlth, Neuherberg, GermanyTech Univ Munich, D-8000 Munich, Germany TI - E-cadherin expression in sporadic gastric cancer from Mexico. Exon 8 and 9 mutations detected by mutation-specific antibodies are an infrequent event associated with poor survival MH - Germany MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000180720100548 SO - Modern Pathology 2003 ;16(1):119A-119A 8065 UI - 7807 AU - Gamboa-Dominguez A AU - Dominguez-Fonseca C AU - Quintanilla-Martinez L AU - Vargas R AU - Reyes-Gutierrez E AU - Luber B AU - Becker KF AU - Becker I AU - Hoefler H AU - Fend F AD - Inst Nacl Ciencias Med SZ, Mexico City, DF, MexicoGSF, Res Ctr Environm & Hlth, Neuherberg, GermanyTech Univ Munich, D-8000 Munich, Germany TI - E-cadherin expression in sporadic gastric cancer from mexico. Exon 8 and 9 mutations detected by mutation-specific antibodies are an infrequent event associated with poor survival MH - Germany MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000180732500550 SO - Laboratory Investigation 2003 ;83(1):119A-119A 8066 UI - 8166 AU - Gamboa-Dominguez A AU - de Anda J AU - Donis J AU - Ruiz-Maza F AU - Visvesvara GS AU - Diliz H AD - Inst Nacl Nutr Salvador Zubiran, Dept Pathol, Mexico City 14000, DF, MexicoHosp Espanol, Dept Nephrol, Mexico City, DF, MexicoCtr Dis Control & Prevent, Div Parasit Dis, Natl Ctr Infect Dis, Atlanta, GA, USAInst Nacl Nutr Salvador Zubiran, Dept Transplantat, Mexico City, DF, MexicoGamboa-Dominguez, A, Inst Nacl Nutr Salvador Zubiran, Dept Pathol, Vasco Quiroga No 15 Tlalpan, Mexico City 14000, DF, Mexico TI - Disseminated Encephalitozoon cuniculi infection in a Mexican, kidney transplant recipient AB - Background. No cases of Encephalitozoon cuniculi infection have been reported in transplant patients. Methods. A 42-year-old man received a renal transplant 8 months earlier because of terminal glomerulonephritis and was. admitted with cough, fever, diarrhea, abdominal pain, and colon wall thickening. While under rapamycin (2 g/day), cyclosporine A (4.4 mg/kg/day), and prednisone (100 mg/day) therapy, he developed Banff grade IB graft rejection and was treated with methylprednisolone (1 g/day) for 3 days and oral prednisone (60 mg/d). Results. Microbiologic studies were inconclusive, and biopsy specimens of ileum, colon, liver, and the grafted kidney revealed numerous gram-positive microsporidia spores. Parasitophorous vacuoles containing various developing stages of Encephalitozoon were seen. Immunofluorescence studies identified the etiologic agent as E. cuniculi. Albendazole therapy resulted in clinical improvement but no eradication after 10 months of follow-up. Conclusions. This report describes what is, to the authors' knowledge, the first case of disseminated E. cuniculi infection in a kidney transplant human immunodeficiency virus-negative patient from Mexico MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Immunology;Surgery;Transplantation U5 - J;Article AV - English IS - 0041-1337 UR - ISI:000183684900020 L2 - ENTEROCYTOZOON-BIENEUSI; CHRONIC DIARRHEA; MICROSPORIDIOSIS SO - Transplantation 2003 ;75(11):1898-1900 8067 UI - 6978 AU - Gao R AU - Coolbaugh M AU - Zuhike C AU - Nakamura K AU - Rasmussen A AU - Matsuura T AU - Siciliano M AU - Ashizawa T AU - Lin X AD - Univ Texas, Med Branch, Galveston, TX 77550, USAUniv Texas, MD Anderson Canc Ctr, Dept Mol Genet, Houston, TX 77030, USAMed Univ Lubeck, Inst Human Genet, D-23538 Lubeck, GermanyUniv Tokyo, Sch Med, Dept Neurol, Tokyo 113, JapanInst Nacl Neurol & Neurociruga, Dept Neurogenet & Mol Biol, Mexico City, DF, MexicoBaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USA TI - Instability of expanded CAG/CAA repeats in spinocerebellar ataxia type 17 MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701239 SO - American Journal of Human Genetics 2003 ;73(5):382-382 8068 UI - 7405 AU - Gao R AU - Coolbaugh M AU - Zuhlke C AU - Nakamura K AU - Rasmussen A AU - Alonso E AU - Matsuura T AU - Siciliano M AU - Lin X AU - Ashizawa T AD - Univ Texas, Med Branch, Dept Neurol, Galveston, TX 77550, USAMD Anderson Canc Ctr, Dept Mol Genet, Houston, TX, USAUniv Lubeck, Inst Human Genet, Lubeck, GermanyUniv Tokyo, Sch Med, Dept Neurol, Tokyo 113, JapanInst Neurol & Neurocirurgia, Dept Neurogenet & Mol Biol, Mexico City, DF, MexicoBaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USA TI - Instability of expanded CAG/CAA repeats in spinocerebellar ataxia type 17 MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0885-3185 UR - ISI:000185440200035 SO - Movement Disorders 2003 ;18(9):1085-1085 8069 UI - 8487 AU - Garate JLM AU - Garcia LS AU - Martinez CSP AU - Iglesias-Arteaga MA AU - Herrera DC AU - Manchado FC AD - Univ La Habana, Fac Quim, Lab Prod Nat, Havana, CubaIglesias-Arteaga, MA, IPN, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508,Esq Av Ticoman 07360, Ticoman 14740, Mexico TI - Synthesis of a new bisnorcholanic lactone AB - The synthesis and spectroscopic characterization of a new bioactive steroid with bisnorcholanic 22-->16 lactone moiety are described MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0039-7911 UR - ISI:000182804200019 L2 - BRASSINOSTEROIDS SO - Synthetic Communications 2003 ;33(7):1203-1209 8070 UI - 8287 AU - Garcia-Calderon G AU - Villavicencio J AU - Yamada N AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoFukui Univ, Dept Informat Sci, Fukui 9108507, JapanGarcia-Calderon, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Equivalence between the real-time Feynman histories and the quantum-shutter approaches for the "passage time" in tunneling AB - We show the equivalence of the functions G(p)(t) and \Psi(d,t)\(2) for the "passage time" in tunneling. The former, obtained within the framework of the real-time Feynman histories approach to the tunneling time problem, uses the Gell-Mann and Hartle's decoherence functional, and the latter involves an exact analytical solution to the time-dependent Schrodinger equation for cutoff initial waves MH - Japan MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000183298800021 L2 - COMPLEX ERROR FUNCTION; TRAVERSAL TIME; MECHANICS SO - Physical Review A 2003 ;67(5): 8071 UI - 2987 AU - Garcia-Carrasco M AU - Medina F AU - Jara LJ AU - Rosas J AU - Anaya JM AU - Font J AU - Ramos-Casals M AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainHosp Espec Siglo XXI, Dept Rheumatol, Mexico City, DF, MexicoHOsp Espec La Raza, Dept Rheumatol, Mexico City, DF, MexicoHosp Vilajoyosa, Dept Rheumatol, Alicante, SpainCIB, Dept Rheumatol, Medellin, Colombia TI - HCV-related cryoglobulinemia mimicking systemic autoimmune disease (The Hispamec Study) MH - Colombia MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551401492 SO - Annals of the Rheumatic Diseases 2003 ;62():446-446 8072 UI - 6956 AU - Garcia-Carrasco M AU - Ramos-Casals M AU - Medina F AU - Jara L AU - Rosas J AU - Anaya JM AU - Font J AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainIMSS, Hosp Siglo XXI, Dept Rheumatol, Mexico City, DF, MexicoIMSS, Hosp La Raza, Dept Rheumatol, Mexico City, DF, MexicoHosp Vilajoyosa, Dept Rheumatol, Alicante, SpainCIB, Dept Rheumatol, Medellin, Colombia TI - Morbidity and mortality of HCV patients presenting systemic autoimmune diseases MH - Colombia MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801376 SO - Arthritis and Rheumatism 2003 ;48(9):S524-S524 8073 UI - 7477 AU - Garcia-Compean H AU - Obregon O AU - Ramirez C AU - Sabido M AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoDept Appl Math & Theoret Phys, Cambridge CB3 0WA, EnglandUniv Guanajuato, Inst Fis, Leon 37150, Gto, MexicoUniv Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72000, MexicoGarcia-Compean, H, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, POB 14-740, Mexico City 07000, DF, Mexico TI - Noncommutative self-dual gravity AB - Starting from a self-dual formulation of gravity, we obtain a noncommutative theory of pure Einstein theory in four dimensions. In order to do that, we use the Seiberg-Witten map. A procedure is outlined that allows one to find the solution of the noncommutative torsion constraint through the vanishing of the commutative one. Finally, the noncommutative corrections to the action are computed up to second order MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185235500045 L2 - QUANTUM-GRAVITY; CANONICAL GRAVITY; FIELD-THEORY; SPACE; DEFORMATION; MODEL SO - Physical Review D 2003 ;68(4): 8074 UI - 7478 AU - Garcia-Compean H AU - Obregon O AU - Ramirez C AU - Sabido M AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Cambridge, DAMTP, Cambridge CB3 0WA, EnglandUniv Guanajuato, Inst Fis, Leon Gto 37150, SpainUniv Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72000, MexicoGarcia-Compean, H, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, POB 14-740, Mexico City 07000, DF, Mexico TI - Noncommutative topological theories of gravity AB - The possibility of noncommutative topological gravity arising in the same manner as Yang-Mills theory is explored. We use the Seiberg-Witten map to construct such a theory based on a SL(2,C) complex connection, from which the Euler characteristic and the signature invariant are obtained. Finally, we speculate on the description of noncommutative gravitational instantons, as well as noncommutative local gravitational anomalies MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185235500068 L2 - POSITIVE-ACTION CONJECTURE; ABELIAN GAUGE-THEORIES; QUANTUM-FIELD THEORY; SELF-DUAL SOLUTIONS; GRAVITATIONAL ANOMALIES; EUCLIDEAN GRAVITY; STANDARD MODEL; SPACES; GEOMETRY; DIMENSIONS SO - Physical Review D 2003 ;68(4): 8075 UI - 8973 AU - Garcia-Cruz I AU - Martinez-Magadan JM AU - Guadarrama P AU - Salcedo R AU - Illas F AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Quim Fis, Ctr Especial Recerca & Quim Teor, Glassboro, NJ 08028, USAGarcia-Cruz, I, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Electronic structure properties of carbazole-like compounds: Implications for asphaltene formation AB - A series of carbazole derivatives have been studied by means of ab initio density functional theory. The molecular structure of these compounds has been obtained by means of geometry optimization and characterized as potential energy surface minima. The analysis of the frontier orbitals together with the study of aromaticity permits one to make quantitative predictions about the reactivity of these molecules. This could be used to predict the influence of substituents on the chemical reactivity of carbazole-like moieties in asphaltenes MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000181398800018 L2 - MOLECULAR-SIZE; CRUDE OILS; ADSORPTION; RESINS; MECHANICS; SURFACE; MODEL SO - Journal of Physical Chemistry A 2003 ;107(10):1597-1603 8076 UI - 8294 AU - Garcia-Gorriz E AU - Candela J AU - Font J AD - CSIC, Inst Ciencias Mar, CMIMA, E-08003 Barcelona, SpainCtr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoGarcia-Gorriz, E, Commiss European Communities, Joint Res Ctr, IES IMW TP-272, I-21020 Ispra, Italy TI - Near-inertial and tidal currents detected with a vessel-mounted acoustic Doppler current profiler in the western Mediterranean Sea AB - The objective of this study is to separate the subinertial, inertial, and tidal fields from vessel-mounted acoustic Doppler current profiler (VM-ADCP) observations acquired during six cruises in the Catalan and Alboran Seas (western Mediterranean Sea). To fulfill this objective we use a method that successfully detects and filters out the main high frequencies that are present in the VM-ADCP data. The resulting near-inertial component has frequencies below the Coriolis frequency f in the Catalan Sea, and above f in the Alboran Sea. The tidal component is consistent with observed and modeled tides in the Catalan and Alboran Seas. The steady component is highly correlated with the geostrophic field. There is also a nonfitted (or residual) component, which represents the misfit between the VM-ADCP data and the model proposed MH - Italy MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000183303500001 L2 - inertial currents;tidal currents;acoustic Doppler current profiler;Alboran Sea;Catalan Sea;SYNOPTIC HYDROGRAPHIC OBSERVATIONS; ALBORAN SEA; TOPEX/POSEIDON ALTIMETRY; ANTICYCLONIC GYRES; SUBTIDAL CURRENTS; OCEAN; CIRCULATION; OSCILLATIONS; SATELLITE; FRONT SO - Journal of Geophysical Research-Oceans 2003 ;108(C5): 8077 UI - 6617 AU - Garcia-Hinojosa JA AU - Gonzalez CR AU - Gonzalez GM AU - Houbaet Y AD - State Univ Ghent, Dept Met & Mat Sci, Met Phys Lab, B-9000 Ghent, BelgiumNatl Autonomous Univ Mexico, Fac Chem, Dept Met, Mexico City 04510, DF, MexicoHoubaet, Y, State Univ Ghent, Dept Met & Mat Sci, Met Phys Lab, B-9000 Ghent, Belgium TI - Structure and properties of Al-7Si-Ni and Al-7Si-Cu cast alloys nonmodified and modified with Sr AB - This work shows the results obtained of the microstructural analysis by optical microscopy (OM) and scanning electron microscopy (SEM-EDX) and its relationship with the mechanical properties of Al-7Si-0.5Cu, Al-7Si-1.5Cu, Al-7Si-0.5Ni and Al-7Si-1.0Ni cast alloys. These cast alloys were manufactured in two conditions: nonmodified and modified with 0.02 wt.% Sr, in order to evaluate the effect of the Sr on the eutectic phase morphology. Results indicated that Sr presence produce a good modification rating of the eutectic phase in the case of Al-7Si-Cu cast alloys and their mechanical properties were increased in as cast condition. However the massive eutectic microconstituent NiAl3 of Al-Si-Ni cast alloys was not affected by Sr presence, and their mechanical properties were not improved. (C) 2003 Elsevier Science B.V. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Industrial;Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0924-0136 UR - ISI:000187510100059 L2 - modification;Al-Si cast alloys;Al-Si-Cu alloys;Al-Si-Ni alloys;Sr addition SO - Journal of Materials Processing Technology 2003 ;143():306-310 8078 UI - 8909 AU - Garcia-Lopez JH AU - Aboites V AU - Kir'yanov AV AU - Damzen MJ AU - Minassian A AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, EnglandGarcia-Lopez, JH, Ctr Invest Opt, Lomas Bosque 115, Leon 37150, Gto, Mexico TI - High repetition rate Q-switching of high power Nd : YVO4 slab laser AB - A high power, diode-side-pumped Nd:YVO4 laser with a grazing incidence cavity geometry was acousto-optically Q-switched at frequencies up to 500 kHz. In CW operation, the laser output power was 16.4 W at 30.5 W of diode pump, corresponding to optical conversion efficiency of 53.8%. In Q-switching operation, measurements were made of average output power, pulse duration, pulse energy and peak power as a function of Q-switching frequency. At 200 kHz repetition rate and pump power 30 W, the laser output had average power 15.9 W (optical conversion efficiency 53%), pulse duration 15 ns, pulse energy 80 muJ and peak power 5.3 kW. A numerical modeling of the Q-switched laser was performed and results compared with experimental data. (C) 2003 Published by Elsevier Science B.V MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000181641000022 L2 - Nd : YVO4;acousto-optic Q-switching;laser modeling;ND-YAG LASER; SATURABLE ABSORBER; MODE SO - Optics Communications 2003 ;218(1-3):155-160 8079 UI - 8095 AU - Garcia-Mendez M AU - Farias MH AU - Galvan-Martinez DH AU - Posada-Amarillas A AU - Beamson G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUANL, Fac Ciencias Fis Matemat, San Nicolas De Los Garza 66450, NL, MexicoUniv Sonora, Dept Invest Fis, Hermosillo 83190, Sonora, MexicoSERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, EnglandFarias, MH, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Experimental and theoretical DOS of Co and Ni silicides AB - A set of samples of Co-Ni silicide thin-films were deposited on Si wafers by PLD and were submitted to thermal-annealing to promote silicidation. Samples were characterized by XPS, including in-depth profiles. Experimental results are complemented with theoretical density of states (DOS). Calculations were performed by means of extended HUM theory approximation. Tendency of DOS behavior of Co and Ni silicides at valence level about similarities/differences between theoretical calculations and experimental results is discussed alongside this work. (C) 2003 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Baja California MH - Mexico|Nuevo Leon MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000183705900164 L2 - X-ray photoelectron spectroscopy;silicides;electron density, excitation spectra calculations;ELECTRONIC-STRUCTURE; FILMS SO - Surface Science 2003 ;532():952-956 8080 UI - 8184 AU - Garcia-Paris M AU - Buchholz DR AU - Parra-Olea G AD - CSIC, Museo Nacl Ciencias Nat, Madrid 28006, SpainUniv Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USAUniv Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoGarcia-Paris, M, CSIC, Museo Nacl Ciencias Nat, Jose Gutierrez Abascal 2, Madrid 28006, Spain TI - Phylogenetic relationships of Pelobatoidea re-examined using mtDNA AB - Pelobatoidea is a clade of ancient anurans with obscure relationships to the remaining clades of frogs. We used partial sequences of two mitochondrial genes (cytochrome b and 16S RNA) from all Pelobatoidea subclades, including all species of Pelobatidae and Pelodytidae and four outgroup taxa (Xenopus, Ascaphus, Discoglossus, and Rana), to propose a phylogenetic hypothesis for relationships within Pelobatoidea. Maximum likelihood and Bayesian analyses support the monophyly of Pelobatoidea, but our hypothesis of internal relationships differs substantially from all previous hypotheses. Megophryidae is sister to Pelobates, and this clade is sister to Pelodytes. The most basal clade within Pelobatoidea is formed by Scaphiopus and Spea. The family Pelobatidae, as previously defined is not monophyletic, and it is split into Eurasian spadefoot toads Pelobates which retain the name Pelobatidae and North American spadefoot toads Scaphiopus and Spea which comprise the revived taxon Scaphiopodidae. Our analysis uncovers the existence of morphologically cryptic taxa within previously recognized species of the genus Spea and reveals marked genetic differentiation within Iberian Pelodytes. We discuss biogeographic implications and the evolution of fossoriality in the light of the new phylogenctic hypothesis. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000183618400002 L2 - Amphibia;Anura;pelobatoidea;phylogeny;evolution;biogeography;mitochondrial DNA;DNA-SEQUENCES; MITOCHONDRIAL GENOME; ANURA; PELOBATIDAE; SUBSTITUTION; LIKELIHOOD; SCAPHIOPUS; AMPLIFICATION; INFERENCE; AMPHIBIA SO - Molecular Phylogenetics and Evolution 2003 ;28(1):12-23 8081 UI - 7184 AU - Garcia-Ramos G AU - MacGregor EA AU - Hilliard B AU - Bordini CA AU - Leston J AU - Hettiarachchi J AD - Pfizer Inc, New York, NY 10017, USAHosp Med Sur, Mexico City, DF, MexicoCity London Migraine Clin, London, EnglandSt Bartholomews Hosp, London, EnglandHosp Clin Ribeirao Preto, Dept Neurol, Ribeirao Preto, BrazilHosp Clin, Rio De Janeiro, BrazilHettiarachchi, J, Pfizer Inc, 235 E 42nd St,10th Floor, New York, NY 10017 USA TI - Comparative efficacy of eletriptan vs. naratriptan in the acute treatment of migraine AB - This was a randomized, double-blind study designed to evaluate the comparative efficacy and tolerability of the 40-mg dose of eletriptan and the 2.5-mg dose of naratriptan. Patients (n = 548) meeting International Headache Society (IHS) criteria for migraine were randomized to treat a single migraine attack with either eletriptan 40 mg, naratriptan 2.5 mg, or placebo. Headache response rates at 2 h and 4 h, respectively, were 56% and 80% for eletriptan, 42% and 67% for naratriptan (P < 0.01 for both time-points vs. eletriptan), and 31% and 44% for placebo (P < 0.0001 vs. both active drugs at both time-points). Eletriptan also showed a significantly greater pain-free response at 2 h (35% vs. 18%; P < 0.001) as well as lower use of rescue medication (15% vs. 27%; P < 0.01) and higher sustained headache response at 24 h (38%) compared with naratriptan (27%; P < 0.05) and placebo (19%; P < 0.01). Both eletriptan and naratriptan were well tolerated. The results confirm previous meta-analyses that have suggested the superiority of eletriptan vs. naratriptan in the acute treatment of migraine MH - USA MH - Brazil MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 17 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0333-1024 UR - ISI:000186118700004 L2 - eletriptan;naratriptan;triptan;migraine;acute treatment;headache;DOUBLE-BLIND; SUMATRIPTAN; TRIPTANS; PROFILE SO - Cephalalgia 2003 ;23(9):869-876 8082 UI - 7536 AU - Garcia-Ramos JE AU - Arias JM AU - Barea J AU - Frank A AD - Univ Huelva, Fac Ciencias Expt, Dept Fis Aplicada, Huelva 21071, SpainUniv Sevilla, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoGarcia-Ramos, JE, Univ Huelva, Fac Ciencias Expt, Dept Fis Aplicada, Huelva 21071, Spain TI - Phase transitions and critical points in the rare-earth region AB - A systematic study of isotope chains in the rare-earth region is presented. For chains Nd-144-154(60),Sm-146-160(62),Gd-148-162(64), and Dy-150-166(66), energy levels, E2 transition rates, and two-neutron separation energies are described by using the most general (up to two-body terms) interacting boson model (IBM) Hamiltonian. For each isotope chain a general fit is performed in such a way that all parameters but one are kept fixed, to describe the whole chain. In this region, nuclei evolve from spherical to deformed shapes and a method based on catastrophe theory, in combination with a coherent-state analysis to generate the IBM energy surfaces, is used to identify critical phase transition points MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000185193000020 L2 - INTERACTING-BOSON MODEL; DYNAMICAL SYMMETRIES; SHAPE TRANSITION; CLASSICAL LIMIT; APPROXIMATION; ISOTOPES; NUCLEI SO - Physical Review C 2003 ;68(2): 8083 UI - 7706 AU - Garcia-Sanchez MF AU - M'Peko JC AU - Ruiz-Salvador AR AU - Rodriguez-Gattorno G AU - Echevarria Y AU - Fernandez-Gutierrez F AU - Delgado A AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaFac Sci, Higher Pedag Inst, Havana 11400, CubaPolytech Sch Montreal, Inst Biomed Engn, Montreal, PQ H3C 3A7, CanadaUniv Sao Paulo, Inst Phys Sao Carlos, BR-13560970 Sao Carlos, SP, BrazilUniv Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrado, Dept Quim Inorgan, Mexico City 04510, DF, MexicoGarcia-Sanchez, MF, Univ Havana, Inst Mat & Reagents, Havana 10400, Cuba TI - An elementary picture of dielectric spectroscopy in solids: Physical basis MH - Brazil MH - Canada MH - Cuba MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary;Education, Scientific Disciplines U5 - J;Article AV - English IS - 0021-9584 UR - ISI:000184795400017 L2 - LOW-FREQUENCY DISPERSION; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; BIOLOGICAL CELLS; CONDENSED MATTER; AC-IMPEDANCE; RELAXATION; MEMBRANES; SYSTEMS; POLARIZATION; DYNAMICS SO - Journal of Chemical Education 2003 ;80(9):1062-1073 8084 UI - 7399 AU - Garcia-Segundo C AU - Ramos-Ortiz G AU - Villagran-Muniz M AD - Natl Autonomous Univ Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Phys, QOLS Grp, London SW7 2BW, EnglandGarcia-Segundo, C, Natl Autonomous Univ Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Apdo Postal 70-186, Mexico City 04510, DF, Mexico TI - Experimental evidence for radiation pressure on a macroscopic dielectric AB - We have detected acoustic signals produced by laser pulses on a macroscopic glass stab, obtaining amplitudes, as function of the angle of incidence, denoted as H-p and H-s depending on the polarization orientations of the pulsed pumping laser, p and s, respectively. The relative behaviour of these curves is related to radiation pressure rather than pure absorption, in the same manner as predicted theoretically in the literature [A Treatise on Electricity and Magnetism, Dover Publications, New York, 1891; Phys. Rep. 52 (1979) 133; Opt. Commun. 58 (1986) 59]. In a second experiment, based on a CW Michelson interferometer, where one of the mirrors is a glass slab pumped at the Brewster angle with the pulsed beam, we verified qualitatively the relationship observed for the H, and H, acoustic experimental data. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000185450500015 L2 - electric moments;wave propagation;photoacoustics;PHASE-NOISE; ELECTROMAGNETIC ENERGY; REFRACTING MEDIUM; MOMENTUM; INTERFEROMETER; MIRROR; LIGHT; REDUCTION SO - Optics Communications 2003 ;225(1-3):115-122 8085 UI - 6559 AU - Garcia-Villafuerte MA AU - Penney D AD - Univ Ciencias & Artes Chiapas, Museo Zool, Escuela Biol, Tuxtla Gutierrez 29000, Chiapas, MexicoUniv Manchester, Manchester M13 9PL, Lancs, EnglandPenney, D, Univ Ciencias & Artes Chiapas, Museo Zool, Escuela Biol, Calzada Samuel Leon Brindis 151, Tuxtla Gutierrez 29000, Chiapas, Mexico TI - Lyssomanes (Araneae, Salticidae) in Oligocene-Miocene Chiapas Amber AB - The genus Lyssomanes (Salticidae) is recorded and described from a fossil in 20-30 Ma Oligocene-Miocene amber from Chiapas, Mexico for the first time. This is the oldest described Lyssomanes and extends the known geological range of the genus by approximately 10 Ma from the previously oldest known specimens in Dominican Republic amber. The geological age of the family may be young compared to other extant spider families MH - United Kingdom MH - Mexico|Chiapas PB - NEW YORK: AMER ARACHNOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0161-8202 UR - ISI:000187722200010 L2 - fossil;jumping spider;Cenozoic;Mexico SO - Journal of Arachnology 2003 ;31(3):400-404 8086 UI - 6483 AU - Garcia AA AU - Cataldo M AU - del Campo S AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Bio Bio, Fac Ciencias, Dept Fis, Concepcion, ChilePontificia Univ Catolica Valparaiso, Fac Ciencias Basicas & Matemat, Inst Fis, Valparaiso, ChileGarcia, AA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Relationship between 2+1 and 3+1 Friedmann-Robertson-Walker cosmologies AB - In this work we establish the correspondence between solutions to the Friedmann-Robertson-Walker cosmologies for perfect fluid and scalar field sources, where both satisfy state equations of the form p+rho=gammaf(rho), not necessarily linear ones. Such state equations are of common use in the case of matter fluids; nevertheless, for a scalar field, they introduce relationships on the potential and kinetic scalar field energies which restrict the set of solutions. A theorem in this respect is demonstrated: From any given 3+1 cosmological solution, obeying the quoted state equations, one can derive its 2+1 cosmological counterpart or vice versa. Some applications are given MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000187969200052 L2 - BLACK-HOLE; INFLATIONARY UNIVERSE; DIMENSIONS; FLATNESS; SYMMETRY; HORIZON SO - Physical Review D 2003 ;68(12): 8087 UI - 7955 AU - Garcia AA AU - Hehl FW AU - Heinicke C AU - Macias A AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyUniv Missouri, Dept Phys & Astron, Columbia, MO 65211, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoGarcia, AA, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Exact vacuum solution of a (1+2)-dimensional Poincare gauge theory: BTZ solution with torsion AB - In the framework of (1+2)-dimensional Poincare gauge gravity, we start from the Lagrangian of the Mielke-Baekler model that depends on torsion and curvature and includes translational and Lorentzian Chern-Simons terms. We find a general stationary circularly symmetric vacuum solution of the field equations. We determine the properties of this solution, in particular its mass and its angular momentum. For vanishing torsion, we recover the BTZ solution. We also derive the general conformally flat vacuum solution with torsion. In this framework, we discuss Cartan's (3-dimensional) spiral staircase and find that it is not only a special case of our new vacuum solution, but can alternatively be understood as a solution of the 3-dimensional Einstein-Cartan theory with matter of constant pressure and constant torque MH - Germany MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000184075300049 L2 - 2+1 DIMENSIONAL GRAVITY; BLACK-HOLE; (2+1)-DIMENSIONAL GRAVITY; 3-DIMENSIONAL GRAVITY; AMORPHOUS SOLIDS; DEFECTS; MODEL; SPACE; DISLOCATIONS; IDENTITIES SO - Physical Review D 2003 ;67(12): 8088 UI - 7455 AU - Garcia AR AU - Avila E AU - Rosiles R AU - Petrone VM AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Ctr Ensenanza Invest & Extens Prod Avicola, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Anim Prod, Mexico City, DF, MexicoGarcia, AR, Univ Georgia, 301 Poultry Sci Bldg, Athens, GA 30602, USA TI - Evaluation of two mycotoxin binders to reduce toxicity of broiler diets containing ochratoxin A and T-2 toxin contaminated grain AB - In order to assess ochratoxin A (OA) and T-2 toxin (T-2) binding ability of two commercial sorbents, both in vitro and in vivo trials with broilers were performed. Crude CA and T-2 extracts from contaminated grain were used to assess in vitro binding ability of two sorbents (Zeotek(TM) [Zk] and Mycofix(TM) [Mx]), by quantifying free mycotoxin through an enzyme-linked immunosorbent assay (ELISA) test. For in vivo trial, a 3 X 2 X 2 factorial arrangement was used for this experiment, being the factors: adsorbents (none, Zk, and Mx), OA (0 and 567 parts per billion [ppb]) and T-2 (0 and 927 ppb). OA and T-2 contaminated wheat and corn, respectively, were added to sorghum-soybean meal diets to meet 567 ppb of CA and 927 ppb of T-2. Mycotoxins were fed alone or combined in treatments. After 21 days, blood chemistry, gross, and histological evaluations were performed. Relative weights of liver, kidney, and bursa of Fabricius were obtained. Zk had the highest OA and T-2 in vitro binding ability (100% and 8.67%, respectively). Chickens fed OA with or without sorbents had a lower body weight and feed intake reduction. However, those birds fed T-2 were partly protected by a sorbent. Birds fed both toxins showed toxic additive effects, and no protection of any adsorbent was observed. A significant reduction in plasma proteins, albumin, and globulins was a characteristic observed in all birds fed diets with OA both with or without adsorbents. Uric acid level in blood was increased in all chickens fed OA-contaminated diets. Histological findings observed in birds fed OA-contaminated diets were necrosis of kidney tubular cells, swollen and necrotic hepatocytes, bile ducts hyperplasia, and increased diameter of proventriculus glands. In birds that received T-2 alone, only the liver, with the same kind of lesions, was affected. According to these results, it can be concluded that there is not a relation between in vitro and in vivo trials. OA toxic effects could not be counteracted by any sorbent. T-2 toxicity could be partially counteracted by an adsorbent used in this research MH - Mexico|Distrito Federal MH - USA PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000185415100022 L2 - mycotoxins;ochratoxin A;T-2 toxin;broilers;adsorbents;evaluation;SODIUM-CALCIUM ALUMINOSILICATE; CHICK PERFORMANCE; AFLATOXIN; EFFICACY; POULTRY; PATHOLOGY; BARLEY; KIDNEY SO - Avian Diseases 2003 ;47(3):691-699 8089 UI - 8398 AU - Garcia CL AU - Johnson WB AD - Texas A&M Univ, Dept Math, College Stn, TX 77843, USAGarcia, CL, Inst Tecnol Autonomo Mexico, Dept Matemat, Rio Hondo 1,Del Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Power type uniform convexity of X via p-asymptotic uniform convexity of L-r(X) AB - We show that if L-r(X), 1 < r < infinity, has an asymptotically uniformly convex renorming of power type then X admits a uniformly convex norm of power type MH - Mexico|Distrito Federal MH - USA PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000183002400013 L2 - asymptotically uniformly convex;asymptotically uniformly smooth;Lebesgue-Bochner spaces;martingale;BANACH-SPACES; NORM SO - Houston Journal of Mathematics 2003 ;29(2):393-402 8090 UI - 9411 AU - Garcia E AU - Hernandez MA AU - Rodriguez FJ AU - Genesca J AU - Boerio FJ AD - IMP, Programa Ingn Mol, Mexico City 07730, DF, MexicoUNAM, Fac Quim, Dpto Ingn Met, Mexico City 04510, DF, MexicoUniv Cincinnati, Dept Mat Sci & Engn, Cincinnati, OH 45221, USAGarcia, E, IMP, Programa Ingn Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Oscillation and chaos in pitting corrosion of steel AB - The potential and current oscillations during pitting corrosion of steel in sodium chloride (NaCl) solution were studied. Detailed analyses using numerical diagnostics developed to characterize complex time series clearly showed that the irregularity in these time series corresponds to deterministic chaos rather than to random noise. The chaotic oscillations were characterized by power spectral densities, phase space, and Lyapunov exponents MH - Mexico|Distrito Federal MH - USA PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000180426500006 L2 - chaos;electrochemical noise;pitting corrosion;steel;DETERMINISTIC CHAOS; CHLORIDE SOLUTIONS; STAINLESS-STEEL; IRON; NOISE; ELECTROLYTES; DISSOLUTION; GROWTH; NICKEL SO - Corrosion 2003 ;59(1):50-58 8091 UI - 6907 AU - Garcia F AU - Solano J AU - Stojmenovic I AU - Stojmenovic M AD - Univ Ottawa, Dept Comp Sci, Ottawa, ON K1N 6N5, CanadaUniv Nacl Autonoma Mexico, DISCA, IIMAS, Mexico City 04510, DF, MexicoStojmenovic, I, Univ Ottawa, Dept Comp Sci, SITE,550 Cumberland St, Ottawa, ON K1N 6N5, Canada TI - Higher dimensional hexagonal networks AB - We define the higher dimensional hexagonal graphs as the generalization of a triangular plane tessellation, and consider it as a multiprocessor interconnection network. Nodes in a k-dimensional (k-D) hexagonal network are placed at the vertices of a k-D triangular tessellation, so that each node has up to 2k + 2 neighbors. In this paper, we propose a simple addressing scheme for the nodes, which leads to a straightforward formula for computing the distance between nodes and a very simple and elegant routing algorithm. The number of shortest paths between any two nodes and their description are also provided in this paper. We then derive closed formulas for the surface area (volume) of these networks, which are defined as the number of nodes located at a given distance (up to a given distance, respectively) from the origin node. The number of nodes and the network diameter under a more symmetrical border conditions are also derived. We show that a k-D hexagonal network of size t has the same degree, the same or lower diameter, and fewer nodes than a (k + 1)-D mesh of size t. Simple embeddings between two networks are also described. That is, we show how to reduce the dimension of a mesh by removing some nodes, and converting it into a hexagonal network, while preserving the simplicity of basic data communication schemes such as routing and broadcasting. (C) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0743-7315 UR - ISI:000186551500011 L2 - interconnection networks;hexagonal networks;addressing;routing;TOPOLOGICAL PROPERTIES; HONEYCOMB; HARTS SO - Journal of Parallel and Distributed Computing 2003 ;63(11):1164-1172 8092 UI - 7525 AU - Garcia F AU - de Galaz EM AU - Baldwin S AU - Papenfuss M AU - Giuliano AR AU - Hatch K AU - Davis J AD - Univ Arizona, Hlth Sci Ctr, Dept Obstet & Gynecol, Tucson, AZ 85724, USAUniv Arizona, Hlth Sci Ctr, Hispan Ctr Excellence, Tucson, AZ 85724, USAUniv Arizona, Hlth Sci Ctr, Coll Publ Hlth, Tucson, AZ 85724, USAISSSTE, Hermosillo, Sonora, MexicoGarcia, F, Univ Arizona, Hlth Sci Ctr, Dept Obstet & Gynecol, 1501 N Campbell Ave,POB 245078, Tucson, AZ 85724 USA TI - Factors that affect the quality of cytologic cervical cancer screening along the Mexico-United States border AB - OBJECTIVE: The purpose of this study was to identify the factors that affect the quality of cytologic cervical cancer screening conducted in public sector clinics in Sonora, Mexico. STUDY DESIGN: We assessed the quality of cervical cytology before and after a 2-hour training session and the implementation of cervical spatulas and endocervical brushes. Additionally, we conducted a cross-sectional study of reproductive aged women who attended public clinics in paired border communities in Sonora and Arizona. Cervical cytologic specimens (n = 2436) were collected and compared for adequacy and cytologic diagnosis and for the prevalence of human papillomavirus infection. RESULTS: The training intervention achieved significantly improved the rates of satisfactory but limited smears and unsatisfactory smears. The cross-sectional study revealed comparable quality indicators for cytologic specimens that were collected in Sonora and Arizona clinics. CONCLUSION: A high-quality cytology-based cervical cancer screening program is possible in public sector clinics in Sonora, with indicators similar to those achieved in comparable Arizona clinics MH - USA MH - Mexico|Sonora PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 1 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000185219100042 L2 - human papillomavirus;cervical cytology;dysplasia;cytologic atypia;screening;Mexico;SQUAMOUS-CELL CARCINOMA; UTERINE CERVIX; RISK-FACTORS; NEOPLASIA; ASSOCIATION; COUNTRIES; PROGRAMS; WOMEN SO - American Journal of Obstetrics and Gynecology 2003 ;189(2):467-472 8093 UI - 7801 AU - Garcia F AU - Barker B AU - Santos C AU - Brown EM AU - Nuno T AU - Giuliano A AU - Davis J AD - Univ Arizona, Hlth Sci Ctr, Hispan Ctr Excellence, Tucson, AZ 85724, USAArizona Canc Ctr, Dept Obstet & Gynecol, Tucson, AZ, USAArizona Canc Ctr, Dept Pathol, Tucson, AZ, USAInst Nacl Enfermedades Neoplasicas, Dept Ginecol, Lima, PeruInst Seguridad Social Serv Trabajadores Estado, Dept Citol, Hermosillo, Sonora, MexicoGarcia, F, Univ Arizona, Hlth Sci Ctr, Hispan Ctr Excellence, 1501 N Campbell Ave,POB 24507, Tucson, AZ 85724 USA TI - Cross-sectional study of patient- and physician-collected cervical cytology and human papillomavirus AB - OBJECTIVE: To compare the performance of patient- and physician-obtained cytology and human papillomavirus (HPV) testing for the detection of high-grade cervical intraepithelial neoplasia. METHODS: A cross-sectional study was performed involving 334 women seen at three colposcopy clinics (Tucson, Arizona; Hermosillo, Mexico; and Lima, Peru). All women used a cytobrush to self-collect specimens for cervical cytology and HPV testing. Subjects subsequently underwent physician collection for cytology and HPV, followed by a complete colposcopic evaluation with directed biopsy. Cytology was processed using thin-layer technology, and HPV was determined using the polymerase chain reaction technique. Test performance characteristics were determined using the histopathologic diagnosis as the reference standard and designating high-grade cervical intraepithelial neoplasia as clinically significant disease for the purpose of the analysis. RESULTS: The sensitivity of patient-collected cytology was significantly lower (55.0%) and specificity was significantly better (84.1%) than those of physician-directed sampling (85.2% and 73.4%, respectively). Patient-collected HPV had significantly lower sensitivity (49.0%) than physician sampling (82.2%), although specificity did not significantly differ. CONCLUSION: Patient collection is a feasible although inferior alternative to physician-collected cervical cytology and HPV testing MH - USA MH - Mexico|Sonora MH - Peru PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 19 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0029-7844 UR - ISI:000184450800010 L2 - POLYMERASE-CHAIN-REACTION; BETHESDA SYSTEM; CANCER; SAMPLES; NEOPLASIA; TRIAL; RISK; PAP SO - Obstetrics and Gynecology 2003 ;102(2):266-272 8094 UI - 8971 AU - Garcia J AU - Valverde G AU - Cruz D AU - Franco A AU - Zink JI AU - Minoofar P AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAGarcia, J, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Structure and polyphenylvinylene concentration effect on the photoconductivity response from mesostructured silica films AB - Highly ordered thin films were made by a dip-coating technique. Sodium dodecyl sulfate (SDS)-templated sol-gel films possess lamellar structure, and cetyltrimethylammonium bromide-templated sol-gel films exhibit a hexagonal structure. In this work, mesostructured films made with these surfactants were doped with polyphenylvinylene (PPV). X-ray diffraction patterns indicate that the films have the known structure. The photoconductivity technique was used to determine the charge-transport mechanism on these films. The parameters for the photovoltaic effect (phil(0)) and photoconductivity (phiutau) were determined from the current density versus the applied-electrical-field results. Lamellar films have bigger values of these parameters than the corresponding ones from the hexagonal films, and the conductivity is better in the former. Charge-transport parameters are quite high in the PPV-doped samples compared with the reported values in films doped with Disperse Red 1 and carbazole (SiK). KNbO3:Fe3+ photorefractive crystals are less photoconductive and photovoltaic than the PPV films, too. There is a critical polymer concentration in the SDS samples MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000181398900011 L2 - THIN-FILMS; PHASE SO - Journal of Physical Chemistry B 2003 ;107(10):2249-2252 8095 UI - 8512 AU - Garcia JA AU - Valverde G AU - Zink JI AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAGarcia, JA, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Using carbazole as a structural modifier of CTAB-templated silicate sol-gel thin films AB - We report the use of organic additive carbazole as a structural modifier to change the mesophase of the mesostructured silicate cetyl trimethyl ammonium bromide (CTAB)-templated sol-gel thin films. The films were made by a dip-coating method on glass slides, which results in optical transparency. The films were characterized by X-ray diffraction patterns. For the small molar concentrations of carbazole (0.1-0.41) to CTAB, the films exhibit a two-dimensional hexagonal structure, which is also obtained for the films that do not have carbazole. As the molar concentration increases from 0.43 to 1.2, surprisingly the films acquire a lamellar structure with an extremely long-range order. This is an unusual result for the films prepared with CTAB, which always gives a hexagonal structure. We study the solvent effect to understand the cause of such a dramatic transformation in the films MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000182781500049 SO - Langmuir 2003 ;19(10):4411-4414 8096 UI - 8125 AU - Garcia N AU - Medina A AD - Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, ScotlandUniv Michoacan San Nicolas Hidalgo, Fac Ingn Elect, Morelia 58030, Michoacan, MexicoGarcia, N, Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, Scotland TI - Swift time domain solution of electric systems including SVSs AB - This contribution deals with the application of Newton methods based on the Poincare map to accelerate the convergence to the limit cycle and to obtain the periodic steady state solution of electric networks containing Static Var Systems (SVS). A three-phase time domain model for the SVS and the inclusion of the control system required for its automatic operation are presented. This is the first time that a full closed-loop control system has been included in a harmonic-oriented method. Furthermore, a model for the thyristor valves based on elementary functions is presented together with a scheme for determining the switching instants of the valves. Simulation results are compared against measurements taken in the laboratory in a TCR circuit MH - Mexico|Michoacan MH - United Kingdom PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000183823000038 L2 - limit cycle;newton methods;Poincare map;SVC;SVS;TCR;HARMONIC POWER-FLOW; STEADY-STATE; METHODOLOGY; TRANSFORMER; SIMULATION; NETWORKS SO - Ieee Transactions on Power Delivery 2003 ;18(3):921-927 8097 UI - 7891 AU - Garcia OP AU - Diaz M AU - Rosado JL AU - Allen LH AD - Univ Calif Davis, Dept Nutr, Program Int Nutr, Davis, CA 95616, USAInst Nacl Nutr Salvador Zubiran, Dept Fisiol Nutr, Mexico City 14000, DF, MexicoUniv Autonoma Queretaro, Fac Ciencias Nat, Queretaro, MexicoAllen, LH, Univ Calif Davis, Dept Nutr, Program Int Nutr, Meyer Hall,1 Shields Ave, Davis, CA 95616 USA TI - Ascorbic acid from lime juice does not improve the iron status of iron-deficient women in rural Mexico AB - Background: Although ascorbic acid (AA) increases dietary iron bioavailability, there has been no food-based community trial of its efficacy in improving iron status. Objective: The objective was to assess the efficacy of 25 mg AA as agua de limon (limeade), consumed with each of 2 daily meals, in improving the iron status of iron-deficient women. Design: Two rural Mexican populations were randomly assigned to an AA or a placebo group, each with 18 iron-deficient women. The AA group was given 500 mL limeade containing 25 mg AA twice a day, 6 d/wk, for 8 mo. The placebo group was given a lime-flavored beverage free of AA or citric acid. Beverages were consumed within 30 min of 2 main daily meals. Data were collected on morbidity (3 times/wk), dietary intake (on 6 d), socioeconomic status, parasites (twice), medical history, and response to treatment. Blood samples at 0, 2, 4, 6, and 8 mo were analyzed for hemoglobin, plasma AA, plasma ferritin, transferrin receptors, and C-reactive protein. Results: AA intake was significantly (P < 0.0001) higher in the AA group, but nonheme iron, heme iron, and phytic acid intakes did not differ significantly. Plasma AA was significantly (P < 0.01) higher in the AA group at 2, 4, 6, and 8 mo. There were no final differences between groups in hemoglobin, plasma ferritin, or transferrin receptor concentrations or in the ratio of transferrin receptors to plasma ferritin after control for initial concentrations. Conclusion: Increasing dietary AA by 25 mg at each of 2 meals/d did not improve iron status in iron-deficient women consuming diets high in phytate and nonheme iron MH - USA MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 8 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000184366300012 L2 - iron deficiency;bioavailability;ascorbic acid;ferritin;transferrin receptors;women;community trial;rural Mexico;SERUM TRANSFERRIN RECEPTOR; ABSORPTION; STORES; DIET; SUPPLEMENTATION; BIOAVAILABILITY; CHILDREN; MEN SO - American Journal of Clinical Nutrition 2003 ;78(2):267-273 8098 UI - 6999 AU - Garcilazo H AU - Valcarce A AD - Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoGarcilazo, H, Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, Spain TI - Chiral quark model with relativistic kinematics AB - The nonstrange baryon spectrum is studied within a three-body model that incorporates relativistic kinematics. We found that the combined effect of relativistic kinematics together with the pion exchange between quarks is able to reverse the order of the first positive- and negative-parity nucleon excited states as observed experimentally. Including the chiral partner of the pion (the sigma meson) leads to an overall good description of the spectrum MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000186510900080 L2 - BARYONS SO - Physical Review C 2003 ;68(3): 8099 UI - 8016 AU - Garcilazo H AD - Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoGarcilazo, H, Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, Spain TI - eta d effective-range formula AB - We obtain the effective-range expansion of the etad system for seven different theoretical models of the two-body interactions. The expansion reproduces very well the theoretical scattering amplitudes for center-of-mass energies up to 100 MeV. Using this expansion we calculate the position of the etaNN quasivirtual state in the complex energy plane as it is predicted by each theoretical model MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000183878900067 L2 - LOW-ENERGY; SCATTERING; 3-CHANNEL; RESONANCE; SYSTEM SO - Physical Review C 2003 ;67(6): 8100 UI - 9153 AU - Gardea-Torresdey JL AU - Gomez E AU - Peralta-Videa JR AU - Parsons JG AU - Troiani H AU - Jose-Yacaman M AD - Univ Texas, Dept Chem & Environm Sci & Engn, El Paso, TX 79968, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUNAM, Inst Fis, Mexico City, DF, MexicoGardea-Torresdey, JL, Univ Texas, Dept Chem & Environm Sci & Engn, PSCI Bldg, El Paso, TX 79968 USA TI - Alfalfa sprouts: A natural source for the synthesis of silver nanoparticles AB - The preparation and study of quantum dots and quantum wires play a very important role in nanotechnology. In this particular study, we report on the uptake of silver by living alfalfa plants. X-ray absorption spectroscopy and transmission electron microscopy (TEM) studies corroborated silver metal uptake by alfalfa plants from a silver-rich solid medium and the subsequent formation of silver nanoparticles. Silver nanoparticle alignment, structure, and coalescence were observed using TEM with an atomic resolution analysis. Dark field image TEM showed the connection of silver nanoparticles of different sizes by possibly noncrystalline silver atomic wires. To our knowledge, this is the first report on the formation of silver nanoparticles by a living plant system MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000181017700055 SO - Langmuir 2003 ;19(4):1357-1361 8101 UI - 7003 AU - Gardner SC AU - Varanasi U AD - NOAA, Natl Marine Fisheries Serv, NW Fisheries Sci Ctr, Seattle, WA 98112, USAGardner, SC, Ctr Invest Biol Noroeste, SC Mar Bermejo 95,Col Playa Palo Santa Rita,Ap 12, La Paz 23090, Baja Calif Sur, Mexico TI - Isovaleric acid accumulation in odontocete melon during development AB - Biosonar in odontocetes is a highly complex process for gathering information about the surrounding environment. The forehead melon lipid and mandibular lipid tissues, which comprise the region known as the acoustical window for cetacean sound production and reception, have a unique biochemical composition that is made up of unusual fatty deposits rich in isovaleric acid. Although the structure of these acoustical lipids was elucidated three decades ago, little work has been done to determine their origin during cetacean development. The objective of this research was to examine development of the acoustical region by characterizing the accumulation of isovaleroyl lipids throughout cetacean early life stages. Biochemical analyses of melon tissue of Phocoena phocoena and Tursiops truncatus of different sizes (as an indicator of age) demonstrated that the proportion of isovalerate increased significantly with length. These results indicate that the acoustic system is not fully developed at birth and that its biochemical structure changes throughout development MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-1042 UR - ISI:000186517000010 L2 - TURSIOPS-TRUNCATUS MONTAGU; BOTTLE-NOSED DOLPHINS; PORPOISE; TISSUES SO - Naturwissenschaften 2003 ;90(11):528-531 8102 UI - 7544 AU - Gardner SC AU - Pier MD AU - Wesselman R AU - Juarez JA AD - Ctr Invest Biol Noroeste SC, La Paz 23090, Baja California, MexicoAmigos Conservac Cabo Pulmo, Norfolk, VA 23501, USAUS EPA, Natl Exposure Res Lab, Ecol Exposure Res Div, Environm Contaminant Characterizat Branch, Cincinnati, OH 45268, USAGardner, SC, Ctr Invest Biol Noroeste SC, Mar Bermejo 195,Col Playa Palo Santa Rita, La Paz 23090, Baja California, Mexico TI - Organochlorine contaminants in sea turtles from the Eastern Pacific AB - We measured organochlorine residues in three species of sea turtles from the Baja California peninsula, Mexico. Seventeen of 21 organochlorine pesticides analyzed were detected, with heptachlor epoxide and gamma-hexachlorocyclohexane the most prevalent (14 (40%) and 11 (31%) of the 35 tissue samples, respectively). PCBs were detected in all but one of the 9 turtles studied, with congener 18 the most commonly detected (8 (23%) of the samples). The dioxin-like congeners 118 and 180 were detected in 4(11%) and 3(9%) of the samples, respectively. Percent contribution of congeners was negatively correlated to their octanol-water partition coefficients, with kidney and muscle containing more lower-chlorinated congeners than liver or adipose samples. Levels of organochlorines detected in the present study were low, potentially attributable to the feeding habits of the predominant species collected in this study (herbivorous) and/or the samples obtained in an unindustrialized region. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000185175900014 L2 - sea turtle;Chelonia mydas;halogenated hydrocarbons;pesticides;developing countries;Mexico;POLYCHLORINATED-BIPHENYLS; ORGANIC CONTAMINANTS; CARETTA-CARETTA; LOGGERHEAD; TISSUES; PCBS; CONGENERS; EGGS SO - Marine Pollution Bulletin 2003 ;46(9):1082-1089 8103 UI - 6924 AU - Garrett TJ AU - Gerber H AU - Baumgardner DG AU - Twohy CH AU - Weinstock EM AD - Univ Utah, Dept Meteorol, Salt Lake City, UT 84112, USAGerber Sci Inc, Reston, VA, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoOregon State Univ, Coll Oceanog & Atmospher Sci, Corvallis, OR 97331, USAHarvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138, USAGarrett, TJ, Univ Utah, Dept Meteorol, Salt Lake City, UT 84112, USA TI - Small, highly reflective ice crystals in low-latitude cirrus AB - [1] At low latitudes, cirrus are ubiquitous and can be in excess of 100 degrees C colder than the surface, limiting the amount of sunlight absorbed by the earth's atmosphere and surface, and reducing its loss of heat. Here we present aircraft measurements within cirrus over southern Florida indicating that ice crystals have smaller sizes and are more reflective than is assumed in most current climate models. If the measurements are generally representative of low- latitude cirrus, they point to a first- order correction to representations of how these clouds affect the earth's climate MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 34 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000186652000005 L2 - COUNTERFLOW VIRTUAL IMPACTOR; RADIATIVE-TRANSFER; OPTICAL-PROPERTIES; SINGLE-SCATTERING; ARCTIC CLOUDS; CLIMATE; CCM3 SO - Geophysical Research Letters 2003 ;30(21): 8104 UI - 7159 AU - Garrison DL AU - Jeffries MO AU - Gibson A AU - Coale SL AU - Neenan D AU - Fritsen C AU - Okolodkov YB AU - Gowing MM AD - Natl Sci Fdn, Div Ocean Sci, Biol Oceanog Programme, Arlington, VA 22230, USAUniv Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775, USAUniv Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064, USAUniv Nevada, Desert Res Inst, Reno, NV 89506, USAUniv Autonoma Metropolitana Iztapalapa, Lab Fitoplancton Marino & Salobre, Dept Hidrobiol Div CBS, Mexico City 09340, DF, MexicoGarrison, DL, Natl Sci Fdn, Div Ocean Sci, Biol Oceanog Programme, 4201 Wilson Blvd,Room 725, Arlington, VA 22230 USA TI - Development of sea ice microbial communities during autumn ice formation in the Ross Sea AB - Sea ice communities were sampled across the Ross Sea in the austral autumn. The biota in first-year pack ice was assessed by measuring chlorophyll a (chl a), phaeopigments, total particulate carbon and nitrogen (POC and PON, respectively) and collecting samples for identification by microscopy. Physical and chemical parameters were also measured to characterize the environment. Chl a concentrations in ice ranged from 0 to 96.9 mug l(-1) in discrete samples and from 0.02 to 20.9 mg m(-2) for values integrated throughout floes. Maximum values were similar to those observed in first-year pack ice at other Antarctic locations. Chl a concentrations varied with ice structure and with latitude. POC:chl a and C:N ratios (molar) were high, possibly indicating detritus accumulations. The higher chl a levels north of approximately 72degreesS were apparently a result of ice forming in the south early in the season with subsequent advection to the north. These dynamics would result in older ice in the mid- or northern pack ice zone that was maintained in a favorable light and temperature regime during the seasonal progression of formation and drift. Chlorophyll levels were low in surf ace-layer communities. High chlorophyll concentrations were associated with internal communities. Bottom-layer algal populations, while present, did not reach the levels of high biomass reported for autumn blooms in some land-fast ice regions. Apparent nutrient and CO2 depletion were correlated with biomass parameters but accounted qualitatively for only a fraction of the biomass accumulation measured. Overall, autumn ice-associated production in the Ross Sea may be lower than expected because of the ice drift dynamics, apparently low production in the near-surface layers of first year ice flows, and the absence of rich bottom-layer assemblages MH - Mexico|Distrito Federal MH - USA PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000186029000001 L2 - Antarctic;sea ice microbial communities;chlorophyll a;POC;PON;ANTARCTIC PACK-ICE; WEDDELL SEA; HIGH-RESOLUTION; FRAZIL ICE; WINTER; ALGAE; BIOTA; ECOLOGY; BRINE; PERCOLATION SO - Marine Ecology-Progress Series 2003 ;259():1-15 8105 UI - 9120 AU - Garza-Gonzalez E AU - Bosques-Padilla FJ AU - Tijerina-Menchaca R AU - Flores-Gutierrez JP AU - Maldonado-Garza HJ AU - Perez-Perez GI AD - NYU, Sch Med, Div Infect Dis, New York, NY, USAUniv Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Lab Anat Patol, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Serv Gastroenterol, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Nuevo Leon, MexicoPerez-Perez, GI, 423 E 23rd St, New York, NY 10010, USA TI - Comparision of endoscopy-based and serum-based methods for the diagnosis of Helicobacter pylori AB - OBJECTIVE: To assess the diagnostic value of the determination of Immunoglobulin (Ig) A and IgG antibodies to H pylori whole cell (WC) and IgG antibodies to cytotoxin associated gene A (CagA) using an in-house ELISA in relation to the results obtained with different invasive methods. METHODS: The study population consisted of 251 Mexican adults, mean age 53 years, age range 15 to 92 years and female to male ratio of 1.5. Peptic ulcer disease was present in 10.8% of these patients, 5.2% had gastric cancer, 11.2% had esophagitis and 72.9% had nonulcer dyspepsia. Biopsy specimens from the body and the antrum of the stomach were obtained for culture, histology and rapid urease test. ELISAs to detect IgA and IgG WC and CagA antibodies were performed using serum. RESULTS: H pylori status was established by the results of the invasive tests. Eighty (31.9%) patients positive to the three tests and 38 (15.1%) negative to all the tests were identified. Based on this result, the sensitivity and specificity of the serology assays were 97.5% and 78.9% for the IgG WC and 70% and 73.7% for the IgA WC, respectively. However, if H pylori status was defined by the positive result of at least one or two invasive diagnostic tests, the sensitivity for the IgG WC decreased to 87.3% and 66.7% respectively, but the specificity was essentially the same. Similar results were obtained for the sensitivity and specificity of IgA using the same criteria. A low CagA prevalence was observed (39%). CONCLUSIONS: Testing for serological. IgG antibodies to H pylori WC was the best to assess whether infection by H pylori was present. Neither the IgA WC nor the IgG CagA ELISAs add significant value in the diagnosis of H pylori MH - Mexico|Nuevo Leon MH - USA PB - OAKVILLE: PULSUS GROUP INC RP - NOT IN FILE U3 - TC 5 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0835-7900 UR - ISI:000181119500002 L2 - diagnosis;Helicobacter;serology;INFECTION; SEROLOGY; ERADICATION SO - Canadian Journal of Gastroenterology 2003 ;17(2):101-106 8106 UI - 9204 AU - Garza-Ocanas L AU - Zanatta-Calderon MT AU - Acosta D AU - Torres-Alanis O AU - Pineyro-Lopez A AD - Univ Autonoma Nuevo Leon, Fac Med, Dept Farmacol & Toxicol, Nuevo Leon, MexicoUniv Cincinnati, Coll Pharm, Cincinnati, OH 45267, USAGarza-Ocanas, L, Univ Autonoma Nuevo Leon, Fac Med, Dept Farmacol & Toxicol, Apdo Postal 146, Nuevo Leon, Mexico TI - Production of reactive oxygen species by toxin T-514 of genus Karwinskia in vitro AB - In the present study we have analyzed the production of reactive oxygen species by toxin T-514 of the genus Karwinskia in vitro (primary liver cell cultures and microsomes), as well as their possible role in its cytotoxicity. The role of catalase and superoxide dismutase (SOD) as defense mechanisms against oxidative stress was also studied. Freshly isolated hepatocytes or microsomes were exposed to T-514 in the presence or absence of catalase and SOD. Cytotoxicity was determined by methylthiazoltetrazolium (MTT) reduction. Oxidative stress was evaluated by the dichlorofluorescein diacetate (DCFDA) fluorescent probe and the reduction of ferricytochrome c. Exposure of hepatocytes to toxin T-514 for 2-, 4-, 6- and 24-h periods resulted in a time- and concentration-dependent increase in the suppression of mitochondrial metabolic activity. T-514 induced the production of reactive oxygen species in both hepatocytes and microsomes. Catalase and superoxide dismutase had a protective effect against the cytotoxicity of T-514 in hepatocytes and also inhibited the production of oxygen reactive species in microsomes. The results indicate that oxidative stress mediated by reactive intermediates may be a mechanism by which T-514 induces its cytotoxic effect. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Toxicology U5 - J;Article AV - English IS - 0887-2333 UR - ISI:000180959000002 L2 - toxin T-514;cytotoxicity in vitro;reactive oxygen species;radical scavengers;HUMBOLDTIANA; TOXICITY; INTOXICATION SO - Toxicology in Vitro 2003 ;17(1):19-25 8107 UI - 6700 AU - Gasca R AU - Shih CT AD - ECOSUR, Chetumal 77000, Quintana Roo, MexicoTaiwan Fisheries Res Inst, Chilung 202, TaiwanCanadian Museum Nat, Ottawa, ON K1P 6P4, CanadaGasca, R, ECOSUR, Apdo Postal 424, Chetumal 77000, Quintana Roo, Mexico TI - Hyperiid amphipods of Banco Chinchorro AB - The Hyperiid amphipod fauna of the tropical northwestern Atlantic is poorly known, particularly in the western Caribbean Sea. Twenty-eight species of Hyperiid were collected from two zooplankton samplings carried out in Banco Chinchorro, an oceanic atoll in the westernmost part of the Caribbean Sea. Lestrigonus bengalensis (40% of hyperiid numbers), Paratyphis maculatus (13.3%) and Tetrathyrus forcipatus (6.3%) were the most abundant species. Hyperiideans were most abundant in the western area of Banco Chinchorro (1202 +/- 116 org/ 1000 m(3)); and least abundant in the reef lagoon. Shannon-Wiener diversity and species richness followed a similar pattern. The strong differences of these parameters between the reef lagoon and the oceanic areas of Banco Chinchorro showed that the oceanic influence within Chinchorro is weak. The occurrence of the highest hyperiid density, diversity, and species richness in the western part seems to be related to accumulation or retention effect in this protected zone MH - Canada MH - Mexico|Quintana Roo MH - Taiwan PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000187322800010 L2 - ZOOPLANKTON; MEXICO; WATERS SO - Bulletin of Marine Science 2003 ;73(1):91-98 8108 UI - 9147 AU - Gaspar-Armenta JA AU - Villa F AU - Lopez-Rios T AD - Ctr Invest Opt, Lomas Del Campestre 37150, Leon Gto, MexicoCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, FranceGaspar-Armenta, JA, Ctr Invest Opt, Loma Bosque 114, Lomas Del Campestre 37150, Leon Gto, Mexico TI - Surface waves in finite one-dimensional photonic crystals: mode coupling AB - The coupling properties of surface waves in finite one-dimensional photonic crystals are analyzed. It is found that in a finite periodic system of alternating dielectric layers bounded by air, the surface modes of each boundary can interact and become coupled in a variable degree depending both on the truncation of the outer layers and the total thickness of the crystal slab. The truncation of outer layers determine the position of the modes inside the band gaps and consequently the magnitude of the decaying length (of electric field) which is minimum in the center and becomes infinite at the edge of band gaps. In this way, the total thickness of the crystal slab must be correlated to the decaying length in order to control the strength of interaction between modes. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000181023500017 L2 - PLASMA-WAVES; EXCITATION; ARRAYS; FILMS; MEDIA SO - Optics Communications 2003 ;216(4-6):379-384 8109 UI - 7450 AU - Gasque G AU - Reynaud E AU - Labarca P AU - Darszon A AD - UNAM, IBT, Cuernavaca 62250, Morelos, MexicoCtr Estudios Cient, Valdivia, Chile TI - K+ currents in Drosophila mushroom body-neurons: the contribution of Shaker MH - Chile MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123801088 SO - Biophysical Journal 2003 ;84(2):222A-223A 8110 UI - 8335 AU - Gauthier A AU - Puente JL AU - Finlay BB AD - Univ British Columbia, Biotechnol Lab, Vancouver, BC V6T 1Z3, CanadaUniv British Columbia, Dept Biochem & Mol Biol, Vancouver, BC V6T 1Z3, CanadaUniv Nacl Autonoma Mexico, Dept Mol Microbiol, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoFinlay, BB, Univ British Columbia, Biotechnol Lab, Vancouver, BC V6T 1Z3, Canada TI - Secretin of the enteropathogenic Escherichia coli type III secretion system requires components of the type III apparatus for assembly and localization AB - At least 16 proteins are thought to be involved in forming the enteropathogenic Escherichia coli (EPEC) type III translocation apparatus which delivers virulence factors into host cells, yet their function and location have not been determined. A biochemical analysis was performed on three components: EscN, a predicted cytoplasmic ATPase; EscV, a predicted inner membrane protein; and EscC, a predicted outer membrane secretin. Wild-type EPEC and mutants constructed in these genes were fractionated by lysozyme treatment, ultracentrifugation, and selective detergent extraction. Fractionation revealed that the type III effectors Tir and EspB required a complete type III apparatus for any degree of export by EPEC, suggesting a continuous channel. Epitope-tagged EscC, EscV, and EscN were localized by fractionation, confirming computer modeling predictions for their location. Transcomplementation experiments revealed that localization of EscV and EscN was unaffected by mutations in other examined type III components. Remarkably, localization of EscC was altered in escV or escN mutants, where EscC accumulated in the periplasm. EscC was correctly localized in the escF needle component mutant, indicating that secretin localization is independent of needle formation. These data indicate that, contrary to previous indications, correct insertion and function of EscC secretin in the outer membrane depends not only on the sec-dependent secretion pathway but also on other type III apparatus components MH - Canada MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 31 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000183116300041 L2 - GRAM-NEGATIVE BACTERIA; FLAGELLAR EXPORT APPARATUS; PROTEIN TRANSLOCATION SYSTEM; CHAPERONE-LIKE PROTEIN; N-TERMINAL DOMAIN; SALMONELLA-TYPHIMURIUM; NEEDLE COMPLEX; OUTER-MEMBRANE; EPITHELIAL-CELLS; YERSINIA-PESTIS SO - Infection and Immunity 2003 ;71(6):3310-3319 8111 UI - 7190 AU - Gavazzi G AU - Cortese L AU - Boselli A AU - Iglesias-Paramo J AU - Vilchez JM AU - Carrasco L AD - Univ Studi Milano Bicocca, I-20126 Milan, ItalyLab Astrophys Marseille, F-13376 Marseille, FranceCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Nacl Autonoma Mexico, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoGavazzi, G, Univ Studi Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy TI - Capturing a star formation burst in galaxies infalling onto the cluster A1367 AB - The discovery of a striking astrophysical laboratory in the cluster of galaxies A1367 by Sakai and coworkers is confirmed with independent imaging and spectroscopic observations and further investigated in the present analysis. Two giant and 10 dwarf/ H II galaxies, members of a group, are simultaneously undergoing a burst of star formation. Redshift measurements suggest that the group galaxies are in the process of falling into the cluster at very high speed. We explore two possible mechanisms that could have triggered the short-lived stellar burst that we are witnessing: the first, internal to the group itself, via tidal interactions among its members, the hypothesis favored by Sakai et al.; the second associated with the high-velocity infall of the group galaxies into the cluster intergalactic medium. We present evidence in favor of and against the two hypotheses MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186170800019 L2 - galaxies : clusters : individual (A1367);galaxies : dwarf;galaxies : evolution;BRIGHTEST SPIRAL GALAXIES; COMPACT-GROUPS; DISK GALAXIES; LUMINOSITY FUNCTION; INTRACLUSTER MEDIUM; NEARBY CLUSTERS; DWARF GALAXIES; VIRGO CLUSTER; COMA; SAMPLE SO - Astrophysical Journal 2003 ;597(1):210-217 8112 UI - 7725 AU - Gavio B AU - Fredericq S AD - CICESE, Dept Ecol, Ensenada 22800, Baja California, MexicoUniv SW Louisiana, Dept Biol, Lafayette, LA 70504, USAGavio, B, CICESE, Dept Ecol, Apdo Postal 2732, Ensenada 22800, Baja California, Mexico TI - Botryocladia caraibica (Rhodymeniales, Rhodophyta), a new species from the Caribbean AB - A new species, Botryocladia caraibica sp. nov., is described from the Caribbean Sea on the basis of comparative morphology and rbcL sequence analysis. The new species is often confused with and reported in the literature as B. pyriformis (Borgesen) Kylin. In R pyriformis a section of the solid stipe shows an abrupt transition between the cortex and medulla, and the vesicle wall is composed of two cell-layers with irregular and almost complete cortication; in B. caraibica the transition between cortex and medulla is more gradual, and the vesicle wall is 3-5 cell-layered with complete cortication. Reproductive structures in R caraibica are unknown. Tetrasporangia of B. pyriformis are newly documented MH - Mexico|Baja California MH - USA PB - PARIS: ADAC-CRYPTOGAMIE RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0181-1568 UR - ISI:000184745500001 L2 - Botryocladia;Caribbean;phylogeny;rbcL;Rhodophyta;Rhodymeniales;taxonomy;SP-NOV; REPRODUCTION; ATLANTIC SO - Cryptogamie Algologie 2003 ;24(2):93-106 8113 UI - 7053 AU - Gazol A AU - Passot T AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoCNRS, Observ Cote Azur, F-06304 Nice 4, FranceGazol, A, Univ Nacl Autonoma Mexico, Inst Astron, Campus Morelia,AP 72-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Twofold effect of Alfven waves on the transverse gravitational instability AB - This paper is devoted to the study of the gravitational instability of a medium permeated by a uniform magnetic field along which a circularly polarized Alfven wave propagates. We concentrate on the case of perturbations purely transverse to the ambient field by means of direct numerical simulations of the MHD equations and of a linear stability analysis performed on a moderate amplitude asymptotic model. The Alfven wave provides an extra stabilizing pressure when the scale of perturbations is sufficiently large or small compared to the Jeans length L-J. However, there is a band of scales around LJ for which the Alfven wave is found to have a destabilizing effect. In particular, when the medium is stable in the absence of waves, the gravitational instability can develop when the wave amplitude lies in an appropriate range. This effect appears to be a consequence of the coupling between Alfven and magnetosonic waves. The prediction based on a WKB approach that the Alfven wave pressure tensor is isotropic and thus opposes gravity in all directions is only recovered for large amplitude waves for which the coupling between the different MHD modes is negligible MH - France MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000186536600004 L2 - instabilities;magnetohydrodynamics (MHD);turbulence;waves;gravitation;PARAMETRIC-INSTABILITIES; HYDROMAGNETIC-WAVES; MOLECULAR CLOUDS; FINITE-AMPLITUDE; MAGNETOHYDRODYNAMIC TURBULENCE; REDUCED MAGNETOHYDRODYNAMICS; MODULATIONAL INSTABILITY; INTERSTELLAR-MEDIUM; COLLAPSE; FILAMENTATION SO - Astronomy & Astrophysics 2003 ;411(2):1-8 8114 UI - 6787 AU - Gaztanaga E AU - Wagg J AU - Multamaki T AU - Montana A AU - Hughes DH AD - CSIC, IEEC, ES-08034 Barcelona, SpainInst Nacl Astrofis Opt & Electr, Puebla, MexicoUniv Barcelona, Dept ECM & CER, E-08028 Barcelona, SpainGaztanaga, E, CSIC, IEEC, Gran Capitan 2-4, ES-08034 Barcelona, Spain TI - Two-point anisotropies in WMAP and the cosmic quadrupole AB - Large-scale modes in the temperature anisotropy power spectrum C-1 measured by the Wilkinson Microwave Anisotropy Probe (WMAP) seem to have lower amplitudes (C-2, C-3 and C-4) than that expected in the so-called concordance A-cold dark matter (LambdaCDM) model. In particular, the quadrupole C-2 is reported to have a smaller value than allowed by cosmic variance. This has been interpreted as a possible indication of new physics. In this paper, we re-analyse the WMAP data using the two-point angular correlation and its higher-order moments. This method, which requires a full covariance analysis, is more direct and provides better sampling of the largest modes than the standard harmonic decomposition. We show that the WMAP data are in good agreement (similar or equal to30 per cent probability) with a LambdaCDM model when the WMAP data are considered as a particular realization drawn from a set of realistic LambdaCDM simulations with the corresponding covariance. This is also true for the higher-order moments, shown here up to sixth order, which are consistent with the Gaussian hypothesis. The sky mask plays a major role in assessing the significance of these agreements. We recover the best-fitting model for the low-order multipoles based on the two-point correlation with different assumptions for the covariance. Assuming that the observations are a fair sample of the true model, we find C-2 = 123 +/- 233, C-3 = 217 +/- 241 and C-4 = 212 +/- 162 (in muK(2)). The errors increase by about a factor of 5 if we assume the LambdaCDM model. If we exclude the Galactic plane \b\ < 30 from our analysis, we recover very similar values within the errors (i.e. C-2 = 172, C-3 = 89, C-4 = 129). This indicates that the Galactic plane is not responsible for the lack of large-scale power in the WMAP data MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 38 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000186533100008 L2 - cosmic microwave background;early Universe;MAPS SO - Monthly Notices of the Royal Astronomical Society 2003 ;346(1):47-57 8115 UI - 7472 AU - Gaztanaga E AU - Wagg J AD - CSIC, IEEC, ES-08034 Barcelona, SpainInst Nacl Astrofis Opt & Elect, Puebla, MexicoGaztanaga, E, CSIC, IEEC, Gran Capitan 2-4, ES-08034 Barcelona, Spain TI - Three-point temperature anisotropies in WMAP: Limits on CMB non-Gaussianities and nonlinearities AB - We present a study of the three-point angular correlation function w(3) = (delta(1)delta(2)delta(3)) of (adimensional) temperature anisotropies measured by the Wilkinson Microwave Anisotropy Probe. The results can be normalized to the two-point function w(2) = (delta(1)delta(2)) in terms of the hierarchical q(3)similar tow(3)/w(2)(2) or dimensionless d(3)similar tow(3)/w(2)(3/2) amplitudes. Strongly non-Gaussian models are generically expected to show d(3)>1 or q(3)>10(3)d(3). Unfortunately, this is comparable to the cosmic variance on large angular scales. For Gaussian primordial models, q(3) gives a direct measure of the nonlinear corrections to temperature anisotropies in the sky: delta=delta(L)+f(NLT)(delta(L)(2) -(delta(L)(2))) with f(NLT)=q(3)/2 for the leading order term in w(2)(2). We find good agreement with the Gaussian hypothesis d(3)similar to0 within the cosmic variance of the simulations of the cold dark matter model with a cosmological constant (ACDM) (with or without a low quadrupole). The strongest constraints on q(3) come from scales smaller than 1degrees. We find q(3)=19 +/- 141 for (pseudo) collapsed configurations and an average of q(3) = 336 +/- 218 for noncollapsed triangles. The corresponding nonlinear coupling parameter f(NL) for curvature perturbations Phi, in the Sachs-Wolfe regime is f(NL)(SW) = q(3)/6, while on degree scales, the extra power in acoustic oscillations produces f(NL)similar toq(3)/30 in the A CDM. Errors are dominated by cosmic variance, but for the first time they begin to be small enough to constrain the leading order nonlinear effects with a coupling of the order of unity MH - Mexico|Puebla MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185229300002 L2 - DIGITAL SKY SURVEY SO - Physical Review D 2003 ;68(2): 8116 UI - 8432 AU - Gaztanaga E AD - CSIC, Inst Estudis Espacials Catalunya, IEEC, Barcelona 08034, SpainINAOE, Dept Astrofis, Puebla, MexicoGaztanaga, E, CSIC, Inst Estudis Espacials Catalunya, IEEC, Gran Capita 2-4, Barcelona 08034, Spain TI - Correlation between galaxies and quasi-stellar objects in the Sloan Digital Sky Survey: A signal from gravitational lensing magnification? AB - We report a detection of a galaxy-QSO cross-correlation w(GQ) in the Sloan Digital Sky Survey early data release over 0.'2 -30' scales. We cross-correlate galaxy samples of different mean depths r' = 19-22 ((z) over bar (G) = 0.15-0.35) with the main QSO population (i'(Q) < 19.1) at <(z)over bar>(Q) similar or equal to 1.6. We find significant positive correlation in all cases except for the faintest QSOs, as expected if the signal were due to weak-lensing magnification. The amplitude of the signal on arcminute scales is about 20% at (z) over bar (G) = 0.15, decreasing to 10% at (z) over bar (G) = 0.35. This is a few times larger than currently expected from weak lensing in the LambdaCDM models but confirms, at a higher significance, previous measurements by several groups. When compared to the galaxy-galaxy correlation w(GG), a weak-lensing interpretation indicates a strong and steep nonlinear amplitude for the underlying matter fluctuations: sigma similar or equal to 400 on scales of 0.2 Mpc h(-1), in contradiction with nonlinear modeling of LambdaCDM fluctuations. We also detect a normalized skewness (galaxy-galaxy-QSO correlation) of S-3 similar or equal to 21 +/- 6 at (z) over bar similar or equal to 0.15 (S-3 similar or equal to 14 +/- 4 at (z) over bar similar or equal to 0.35), which is several standard deviations low compared to standard LambdaCDM expectations. These observational trends can be reconciled with lensing in a. at Lambda universe with sigma(8) similar or equal to 1, provided that the linear spectrum is steeper (n similar or equal to 1) than in the LambdaCDM model on small (cluster) scales. Under this interpretation, the galaxy distribution traces the matter variance with an amplitude that is 100 times smaller; i.e., galaxies are antibiased with b similar or equal to 0.1 on small scales, increasing to b similar or equal to 1 at similar or equal to 10 Mpc h(-1) MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000182943500008 L2 - cosmology : observations;galaxies : clusters : general;gravitational lensing;large-scale structure of universe;LARGE-SCALE STRUCTURE; ANGULAR-CORRELATION FUNCTION; 3-POINT CORRELATION-FUNCTION; APM POWER SPECTRUM; PERTURBATION-THEORY; IRAS GALAXIES; BIAS; EVOLUTION; ASSOCIATIONS; STATISTICS SO - Astrophysical Journal 2003 ;589(1):82-99 8117 UI - 7873 AU - Geissen V AU - Kim RY AU - Schoning A AU - Schutte S AU - Brummer GW AD - Colegio Frontera Sur, Tabasco, MexicoDept Soil Sci, D-53115 Bonn, GermanyForstamt Kottenforst, D-53123 Bonn, GermanyGeissen, V, Colegio Frontera Sur, Adm Correos 2,Apartado Postal 1042,CP 86168, Tabasco, Mexico TI - Effects of strip wise tillage in combination with liming on chemical and physical properties of acidic spruce forest soils after clear cutting AB - We investigated the initial effects of strip wise soil loosening (0-35 cm depth) on soil chemical and physical parameters by using a deeply working rotary cultivator in combination with liming and mixing of the dolomite with the soil material of acidic forests. The investigations took place 8 months after the treatment. pH values and contents of exchangeable Ca and Mg increased significantly at the tilled depth whereas the content of exchangeable Al and easily soluble P decreased. The rate of mineralisation increased at this depth which was shown by a loss of Corg, Ntot and short-term loss of NO3-N. The treatment led to a mobilisation of Mn at the tilled depth. However, the content of exchangeable Pb decreased due to an increased pH value. Below the tillage depth of 35 cm only partly significant changes of exchangeable Mn and NO3-N were found. The total porosity and bulk density at 10-15 and 40-45 cm depths were not significantly different from those in the control plot, but the rate of infiltration increased significantly. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Tabasco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000184311800007 L2 - forest soil;liming;nitrate;strip wise tillage;soil properties;HEAVY-METALS; LIME SO - Forest Ecology and Management 2003 ;180(1-3):75-83 8118 UI - 4091 AU - Gelbukh A AU - Levachkine S AU - Han SY AD - IPN, Ctr Res Comp, Natl Language Proc Lab, Mexico City, DF, MexicoIPN, Ctr Res Comp, Image Proc & Pattern Recognit Lab, Mexico City, DF, MexicoChung Ang Univ, Dept Comp Sci & Engn, Seoul, South KoreaGelbukh, A, IPN, Ctr Res Comp, Natl Language Proc Lab, Mexico City, DF, Mexico TI - Resolving ambiguities in toponym recognition in cartographic maps AB - To date many methods and programs for automatic text recognition exist. However there are no effective text recognition systems for graphic documents. Graphic documents usually contain a great variety of textual information. As a rule the text appears in arbitrary spatial positions, in different fonts, sizes and colors. The text can touch and overlap graphic symbols. The text meaning is semantically much more ambiguous in comparison with standard text. To recognize a text of graphic documents, it is necessary first to separate it from linear objects, solids, and symbols and to define its orientation. Even so, the recognition programs nearly always produce errors. In the context of raster-to-vector conversion of graphic documents, the problem of text recognition is of special interest, because textual information can be used for verification of vectorization results (post-processing). In this work, we propose a method that combines OCR-based text recognition in raster-scanned maps with heuristics specially adapted for cartographic data to resolve the recognition ambiguities using, among other information sources, the spatial object relationships. Our goal is to form in the vector thematic layers geographically meaningful words correctly attached to the cartographic objects MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224371200007 L2 - IMAGES SO - Graphics Recognition: Recent Advances and Perspectives 2003 ;3088():75-86 8119 UI - 5922 AU - Gelbukh A AU - Sidorov G AU - Han SY AU - Chanona-Hernandez L AD - IPN, Ctr Comp Res CIC, Mexico City 07738, DF, MexicoChung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South KoreaLas Americas Univ, Dept Comp Sci, Mexico City, DF, MexicoGelbukh, A, IPN, Ctr Comp Res CIC, Av Juan Dios Batiz, Mexico City 07738, DF, Mexico TI - Automatic evaluation of quality of an explanatory dictionary by comparison of word senses AB - Words in the explanatory dictionary have different meanings (senses) described using natural language definitions. If the definitions of two senses of the same word are too similar, it is difficult to grasp the difference and thus it is difficult to judge which of the two senses is intended in a particular contexts, especially when such a decision is to be made automatically as in the task of automatic word sense disambiguation. We suggest a method of formal evaluation of this aspect of quality of an explanatory dictionary by calculating the similarity of different senses of the same word. We calculate the similarity between two given senses as the relative number of equal or synonymous words in their definitions. In addition to the general assessment of the dictionary, the individual suspicious definitions are reported for possible improvement. In our experiments we used the Anaya explanatory dictionary of Spanish. Our experiments show that there are about 10% of substantially similar definitions in this dictionary, which indicates rather low quality MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000189417700054 SO - Perspectives of System Informatics 2003 ;2890():556-562 8120 UI - 7575 AU - George MLC AU - Prasanna BM AU - Rathore RS AU - Setty TAS AU - Kasim F AU - Azrai M AU - Vasal S AU - Balla O AU - Hautea D AU - Canama A AU - Regalado E AU - Vargas M AU - Khairallah M AU - Jeffers D AU - Hoisington D AD - CIMMYT, Asian Maize Biotechnol Network, IRRI, MetroManila, PhilippinesIndian Agr Res Inst, Maize Genet Unit, LBS Ctr Biotechnol, New Delhi 110012, IndiaMaharana Pratap Agr Univ, Dept Plant Pathol, Udaipur 313001, IndiaUniv Agr Sci, Reg Res Stn, Mandya 571405, IndiaAgcy Agr Res & Dev, Res Inst Maize & Cereals, Maros, S Sulawesi, IndonesiaCIMMYT, Asian Reg Maize Program, Bangkok, ThailandUniv Philippines, Inst Plant Breeding, Los Banos, Laguna, PhilippinesCIMMYT Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoGeorge, MLC, CIMMYT, Asian Maize Biotechnol Network, IRRI, DAPO Box 7777, MetroManila, Philippines TI - Identification of QTLs conferring resistance to downy mildews of maize in Asia AB - Downy mildew is one of the most destructive diseases of maize in subtropical and tropical regions in Asia. As a prerequisite for improving downy mildew resistance in maize, we analyzed quantitative trait loci (QTLs) involved in resistance to the important downy mildew pathogens - Peronosclerospora sorghi (sorghum downy mildew) and P. heteropogoni (Rajasthan downy mildew) in India, P. maydis (Java downy mildew) in Indonesia, P. zeae in Thailand and P. philippinensis in the Philippines - using a recombinant inbred line population derived from a cross between Ki3 (downy mildew resistant) and CML139 (susceptible). Resistance was evaluated as percentage disease incidence in replicated field trials at five downy mildew 'hotspots' in the four countries. Heritability estimates of individual environments ranged from 0.58 to 0.75 with an across environment heritability of 0.50. Composite interval mapping was applied for QTL detection using a previously constructed restriction fragment length polymorphism linkage map. The investigation resulted in the identification of six genomic regions on chromosomes 1, 2, 6, 7 and 10 involved in the resistance to the downy mildews under study, explaining, in total, 26-57% of the phenotypic variance for disease response. Most QTL alleles conferring resistance to the downy mildews were from Ki3. All QTLs showed significant QTL x environment interactions, suggesting that the expression of the QTL may be environment-dependent. A strong QTL on chromosome 6 was stable across environments, significantly affecting disease resistance at the five locations in four Asian countries. Simple-sequence repeat markers tightly linked to this QTL were identified for potential use in marker-assisted selection MH - India MH - Indonesia MH - Mexico|Distrito Federal MH - Philippines MH - Thailand PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000185004200019 L2 - downy mildews;maize;quantitative trait loci;disease resistance;molecular markers;QUANTITATIVE TRAIT LOCI; TROPICAL MAIZE; MOSAIC-VIRUS; PEARL-MILLET; LEAF-BLIGHT; GENES; PERONOSCLEROSPORA; INHERITANCE; SORGHUM; DISEASE SO - Theoretical and Applied Genetics 2003 ;107(3):544-551 8121 UI - 9357 AU - Gerbino DC AU - Hevia E AU - Morales D AU - Clemente MEN AU - Perez J AU - Riera L AU - Riera V AU - Miguel D AD - Univ Oviedo, Fac Quim, CSIC, Dept Quim Organ & Inorgan,IUQOEM, E-33071 Oviedo, SpainESIQIE IPN, Upalm, DF, MexicoUniv Valladolid, Fac Ciencias, Dept Quim Inorgan, Valladolid 47071, SpainPerez, J, Univ Oviedo, Fac Quim, CSIC, Dept Quim Organ & Inorgan,IUQOEM, E-33071 Oviedo, Spain TI - A new reactivity pattern of low-valent transition-metal hydroxo complexes: straightforward synthesis of hydrosulfido complexes via reaction with carbon disulfide AB - A new basic transformation linking two important classes of transition metal compounds; namely, hydroxo and hydrosulfido complexes has been discovered MH - Mexico|Distrito Federal MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000180581500013 L2 - AMIDO COMPLEXES; LIGANDS; OXYGEN SO - Chemical Communications 2003 ;(3):328-329 8122 UI - 6878 AU - Gernandt DS AU - Liston A AU - Pinero D AD - Univ Autonoma Estado Hidalgo, Ctr Invest Biol, Hidalgo 42001, MexicoOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USANatl Autonomous Univ Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoGernandt, DS, Univ Autonoma Estado Hidalgo, Ctr Invest Biol, Apdo Postal 1-69,Plaza Juarez, Hidalgo 42001, Mexico TI - Phylogenetics of Pinus subsections Cembroides and Nelsoniae inferred from cpDNA sequences AB - We sequenced chloroplast DNA from the matK, rbcL, and rpl16 regions to infer interrelationships within the pinyon pines (Pinus subsections Cembroides and Nelsoniae). Pinyons, together with subsections Balfourianae, Gerardianae, and Krempfianae have been classified in section Parrya, characterized by a dorsal umbo (raised area) on the ovulate cone scale. All three cpDNA regions support the separation of pinyon pines into subsection Cembroides and a monotypic subsection Nelsoniae and indicate that section Parrya is paraphyletic. We propose restricting section Parrya to the North American clade (subsections Cembroides, Nelsoniae, and Balfourianae) and transferring the Asian subsections Gerardianae and Krempfianae to section Quinquefolius (generally known as section Strobus). The data moderately support a sister relationship between subsections Nelsoniae and Balfourianae, rendering the pinyons paraphyletic. Several monophyletic groups can be identified within subsection Cembroides, including a sister relationship between R maximartinezii and P. pinceana, which is at variance with morphological cladistic analyses. In general, relationships inferred from cpDNA are less consistent with morphological evidence than with internal transcribed spacer region data, despite paralogy in the latter marker MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000186668400003 L2 - NUCLEAR RIBOSOMAL DNA; CHLOROPLAST DNA; PINYON PINES; PINACEAE; DIFFERENTIATION; MORPHOLOGY; EVOLUTION; HISTORY; MEXICO; GENOME SO - Systematic Botany 2003 ;28(4):657-673 8123 UI - 9429 AU - Gerrish PJ AU - Garcia-Lerma JG AD - Inst Mexicano Petr, Programa Invest Matemat Aplicadas & Computac, Dept Appl Math, Mexico City 07730, DF, MexicoLos Alamos Natl Lab, Los Alamos, NM, USACtr Dis Control, Natl Ctr Infect Dis, Div AIDS STD & TB Lab Res, HIV & Retrovirol Branch, Atlanta, GA 30333, USAGerrish, PJ, Inst Mexicano Petr, Programa Invest Matemat Aplicadas & Computac, Dept Appl Math, Mexico City 07730, DF, Mexico TI - Mutation rate and the efficacy of antimicrobial drug treatment AB - Despite rapid progress in drug development, microbial infections in general are becoming increasingly difficult to treat as a result of the emergence of drug-resistant strains. In some cases, such as HIV-1, the early goal of eradicating infections with antimicrobial drugs is, for now, being replaced with the more pragmatic goal of controlling infections over long periods of time through a succession of transiently effective treatments. Because treatment efficacy is often incomplete, studying the degree of treatment efficacy has great relevance to clinical disease management. We derived a model describing the association between the mutation rate of the pathogen and the degree of treatment efficacy. We found that drug treatment is most effective when the mutation rate of the pathogen is either very low or, perhaps counterintuitively, very high. We discuss this finding in the light of a promising new treatment strategy for RNA viruses that combines antiviral compounds with a mutagen MH - Mexico|Distrito Federal MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 15 U4 - Infectious Diseases U5 - J;Review AV - English IS - 1473-3099 UR - ISI:000180201400022 L2 - IMMUNODEFICIENCY-VIRUS TYPE-1; MULLERS RATCHET; LETHAL MUTAGENESIS; POPULATION; FITNESS; EVOLUTION; REPLICATION; ANALOGS; HIV SO - Lancet Infectious Diseases 2003 ;3(1):28-32 8124 UI - 6975 AU - Gil CN AU - Aparicio JMR AU - Barrientos MP AU - San Martin WB AU - Mendez MVC AU - Hurtado LH AU - Balbuena ER AU - Gonzalez LAS AU - Tenorio RT AU - Salinas FC AD - Hosp Nino Poblano, Puebla, MexicoBenemerita Univ, Puebla, MexicoMed Univ S Carolina, Charleston, SC 29425, USA TI - Phenotipical genetic variability of ectodermic displasia in a pediatric hospital. Study of five different Mexican families MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599700581 SO - American Journal of Human Genetics 2003 ;73(5):269-269 8125 UI - 8803 AU - Gilg HA AU - Weber B AU - Kasbohm J AU - Frei R AD - Tech Univ Munich, Fak Chem, D-85747 Garching, GermanyCICESE, Div Ciencias Terra, Ensenada 22830, Baja California, MexicoUniv Greifswald, Inst Geol Wissensch, D-17489 Greifswald, GermanyUniv Copenhagen, Inst Geol, DK-1350 Copenhagen, DenmarkGilg, HA, Tech Univ Munich, Fak Chem, Lichtenbergstr 4, D-85747 Garching, Germany TI - Isotope geochemistry and origin of illite-smectite and kaolinite from the Seilitz and Kemmlitz kaolin deposits, Saxony, Germany AB - Residual clays that developed on Permian and Carboniferous glass-rich silicic volcanic rocks (pitchstones, ignimbrites) at the Seilitz and Kemmlitz kaolin deposits, Saxony, Eastern Germany, contain locally abundant lath-shaped illite-rich illite-smectite mixed-layer minerals (I-S). Analyses by XRD and TEM-AES reveal a large illite percentage (>similar to90%) and R3 ordering in I-S from Seilitz (>similar to90%) and smaller illite percentage (similar to70%) and RI ordering in I-S from Kemmlitz. The clays never Suffered a deep burial and there is no geological, petrographic or fluid inclusion evidence for aeolian input or hydrothermal origin of I-S at either deposit. The I-S formed exclusively at the expense of volcanic glass and not front K-fieldspar. Residual quartz phenocrysts in the clays still preserve primary glassy silicate melt inclusions and lack secondary aqueous fluid inclusion trails. The deltaD and delta(18)O values of kaolmite and I-S are Suggestive of low Low formation temperatures (<40degreesC). Rb-Sr and K-Ar dating of I-S-bearing clay separates yield Lower Cretaceous ages at Seilitz and indicates the presence of excess or inherited Ar-40 in illite-rich I-S. In contrast, Triassic to Jurassic Rb-Sr ages are obtained for I-S from the Kemmlitz kaolin deposit MH - Denmark MH - Germany MH - Mexico|Baja California PB - LONDON: MINERALOGICAL SOCIETY RP - NOT IN FILE U3 - TC 5 U4 - Mineralogy U5 - J;Article AV - English IS - 0009-8558 UR - ISI:000182034400008 L2 - illite-smectite;kaolinite;oxygen isotopes;hydrogen isotope;Rb-Sr;K-Ar;Mesozoic;kaolin deposits;TEM;Saxony;Seilitz;Kemmlitz;LOWER CAMBRIAN CLAYS; STABLE-ISOTOPE; OXYGEN-ISOTOPE; RB-SR; DIAGENETIC ILLITE; NORTH ESTONIA; MINERALS; MINERALIZATION; PORPHYRY; JAPAN SO - Clay Minerals 2003 ;38(1):95-112 8126 UI - 6803 AU - Gleadow AJW AU - Kohn BP AU - Fletcher JM AU - Brown RW AU - Raza A AD - Univ Melbourne, Sch Earth Sci, Melbourne, Vic, AustraliaCICESE, Dept Geol, Ensenada, Baja California, Mexico TI - Low-temperature thermochronology of fundamental structures in the Gulf Extensional Province, Baja California, Mexico MH - Australia MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Meeting Abstract AV - English IS - 0016-7037 UR - ISI:000185517600237 SO - Geochimica et Cosmochimica Acta 2003 ;67(18):A122-A122 8127 UI - 6534 AU - Goberna MA AU - Lopez MA AU - Todorov MI AD - Univ Alicante, Fac Sci, Dept Stat & Operat Res, Alicante 03071, SpainUDLA, Puebla, MexicoGoberna, MA, Univ Alicante, Fac Sci, Dept Stat & Operat Res, Alicante 03071, Spain TI - Extended active constraints in linear optimization with applications AB - In this paper we introduce different relaxations of the concept of active constraint at a given point with respect to a certain linear inequality system with an arbitrary number of constraints. We show that these concepts provide useful local information in linear optimization, for instance conditions for a given feasible solution to be a unique, extreme point, optimal solution or a strongly unique optimal solution MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1052-6234 UR - ISI:000187742000017 L2 - linear programming;linear semi-infinite programming;active constraints;UNICITY SO - Siam Journal on Optimization 2003 ;14(2):608-619 8128 UI - 7098 AU - Goberna MA AU - Lopez MA AU - Todorov MI AD - Univ Alicante, Fac Sci, Dept Stat & Operat Res, Alicante 03071, SpainUDLA, Dept Math & Phys, Puebla, MexicoGoberna, MA, Univ Alicante, Fac Sci, Dept Stat & Operat Res, Ctra San Vicente Raspeig SN, Alicante 03071, Spain TI - A generic result in linear semi-infinite optimization AB - In this paper we consider the space of all the linear semi-infinite programming problems with the same index set, endowed with a suitable topology. We provide a constructive proof of the following generic result: if we confine ourselves to the class of problems having a bounded set of coefficient vectors (those vectors appearing in the left-hand side of the constraints), the set of those problems which have a strongly unique optimal solution contains an open and dense subset of the set of solvable problems in the same class MH - Mexico|Puebla MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0095-4616 UR - ISI:000186371000002 L2 - semi-infinite linear optimization;strong unique solution;stability theory;WELL-POSEDNESS; STABILITY SO - Applied Mathematics and Optimization 2003 ;48(3):181-193 8129 UI - 7223 AU - Gochis DJ AU - Leal JC AU - Shuttleworth WJ AU - Watts CJ AU - Garatuza-Payan J AD - Natl Ctr Atmospher Res, Adv Study Program, Res Applicat Program, Boulder, CO 80307, USAInst Medio Ambiente & Desarrollo Sustentable, Hermosillo, Sonora, MexicoUniv Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721, USAInst Tecnol Sonora, Obregon, MexicoGochis, DJ, Natl Ctr Atmospher Res, Adv Study Program, Res Applicat Program, POB 3000, Boulder, CO 80307 USA TI - Preliminary diagnostics from a new event-based precipitation monitoring system in support of the North American monsoon experiment AB - The purpose of this note is to present preliminary findings from a new event-based surface rain gauge network in the region of northwest Mexico. This region is characterized as semiarid, owing the largest percentage of its annual rainfall to summer convective systems, which are diurnal in nature. Although the existing surface network and satellite-derived precipitation products have clarified some features of convective activity over the core region of the North American monsoon (NAM), a detailed examination of the spatial and temporal structure of such activity has been prohibited by the lack of a surface observation network with adequate temporal and spatial resolution. Specifically, the current network of sparsely spaced climate stations has inhibited a detailed diagnosis of the timing, intensity, and duration of convective rainfall in general, and of the topography-rainfall relationship in particular. In this note, a brief overview of the network and present preliminary analyses from the first monitoring season, summer 2002, is provided. It is shown that the diurnal cycle of precipitation varies with elevation in a way that is consistent with a hypothesis that convective events organize and, occasionally, propagate from high terrain onto lower-elevation plains, but more conclusive statements will require expansion of the network and increased record length. It is also emphasized from these studies that it is essential to evaluate wet-day statistics or rainfall intensities from precipitating periods in parallel, with comparable all-day statistics, when conducting hydrometeorological analyses in semiarid convective regimes where precipitation is infrequent and highly localized MH - USA MH - Mexico|Sonora PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1525-755X UR - ISI:000185945200015 L2 - CALIFORNIA; SURGES; GULF SO - Journal of Hydrometeorology 2003 ;4(5):974-981 8130 UI - 6641 AU - Godinez-Alvarez H AU - Valverde T AU - Ortega-Baes P AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Unidad Biol Tecnol & Prototipos, Tlalnepantla 54090, Edo De Mexico, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Mexico City 04510, DF, MexicoUniv Nacl Salta, Fac Ciencias Nat, Lab Invest Bot, RA-4400 Salta, ArgentinaGodinez-Alvarez, H, Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Unidad Biol Tecnol & Prototipos, Avenida Barrios 1,Ap Postal 314, Tlalnepantla 54090, Edo De Mexico, Mexico TI - Demographic trends in the Cactaceae AB - Although our biological knowledge regarding cactus species is thorough in many areas, only in recent years have ecologists addressed their demographic behavior. Here we attempt a first review of the present knowledge on cactus demography, including an analysis of the published information on species with different growth forms and life-history traits. Our review shows that cactus distribution ranges are determined by environmental heterogeneity and by species-specific physiological requirements. Temperature extremes may pose latitudinal and altitudinal distribution limits. At a more local scale, soil properties dramatically affect cactus distribution. Most cacti show a clumped spatial distribution pattern, which may be the reflection of a patchy resource distribution within their heterogeneous environments. The association of cacti with nurse plants is another factor that may account for this aggregated distribution. Many cacti grow in association with these perennial nurse plants, particularly during early life-cycle phases. The shade provided by nurse plants results in reduced evapotranspiration and buffered temperatures, which enhance cactus germination and establishment. In some cases a certain degree of specificity has been detected between particular cactus species and certain nurse plants. Yet some globose cacti may establish in the absence of nurse plants. In these cases, rocks and other soil irregularities may facilitate germination and establishment. Cacti are slow-growing species. Several abiotic factors, such as water and nutrient availability, may affect their growth rate. Competition and positive associations (i.e., mycorrhizae and nurse-cacti association) may also affect growth rate. Age at first reproduction varies greatly in relation to plant longevity. In general, cactus reproductive capacity increases with plant size. Populations are often composed of an uneven number of individuals distributed in the different size categories. This type of population structure reflects massive but infrequent recruitment events, apparently associated with benign periods of abundant rainfall. A few cactus species have been analyzed through the use of population-projection matrices. A total of 17 matrices were compiled and compared. Most of them reflect populations that are close to the numerical equilibrium (lambda = close to unity). Elasticity analyses revealed that the persistence of individuals in their current size category ("stasis") is the demographic process that contributes the most to population growth rate. Also, adult categories (rather than juveniles or seedlings) show the largest contributions to lambda. No differences were apparent regarding this matter between cacti with different life-forms. This review shows that our knowledge of cactus population ecology is still incipient and rather unevenly distributed: some topics are well developed; for others the available information is still very limited. Our ability to preserve the great number of cactus species that are now endangered depends on our capacity to deepen our ecological understanding of their population processes MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 24 U4 - Plant Sciences U5 - J;Review AV - English IS - 0006-8101 UR - ISI:000187438500004 L2 - CACTUS NEOBUXBAUMIA-TETETZO; NORTHERN SONORAN DESERT; SAGUARO CARNEGIEA-GIGANTEA; PROJECTION MATRIX ANALYSIS; PLANT MIMOSA-LUISANA; NECTAR-FEEDING BATS; PRICKLY PEAR CACTUS; 2 COLUMNAR CACTI; POLLINATION BIOLOGY; TEHUACAN VALLEY SO - Botanical Review 2003 ;69(2):173-203 8131 UI - 8190 AU - Godinez-Dominguez E AU - Freire J AD - Univ A Coruna, Dept Biol Anim Biol Vegetal & Ecol, La Coruna 15071, SpainUniv Guadalajara, Ctr Ecol Costera, Ctr Univ Costa Sur, San Patricio Melaque 48980, Jalisco, MexicoGodinez-Dominguez, E, Univ A Coruna, Dept Biol Anim Biol Vegetal & Ecol, Campus Zapateira S-N, La Coruna 15071, Spain TI - Information-theoretic approach for selection of spatial and temporal models of community organization AB - The literature on the ecology of marine assemblages includes frequent examples of data analysis with no well-defined alternative hypotheses for the definition of environmental variables (independent matrix for multivariate methods). Alternative models, whereby spatial or temporal patterns are investigated, should be explicitly assumed. We present a parsimonious procedure for model selection in multivariate data combined with canonical correspondence analysis to determine the measure of explained variance for each tested model, using Akaike's information criterion (AIC) for model selection. The AIC procedure is an effective tool for model selection and, in contrast to other conventional procedures that use only 1 implicit model and ignore other community patterns, it provides a framework for ranking hierarchical patterns that adds an alternative non-disjunctive perspective to assemblage analysis. Hierarchical patterns are revealed as layers in a scale-dependent framework MH - Mexico|Jalisco MH - Spain PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000183487200002 L2 - Akaike's information criterion;model selection;spatial models;temporal models;canonical correspondence analysis;parsimony;marine benthic communities;community dynamics;PATTERNS SO - Marine Ecology-Progress Series 2003 ;253():17-24 8132 UI - 6230 AU - Goerlitz DS AU - Urban J AU - Rojas-Bracho L AU - Belson M AU - Schaeff CM AD - American Univ, Dept Biol, Washington, DC 20016, USAUniv Autonoma Baja California, Dept Biol Marina, La Paz 23081, Baja California, MexicoInst Nacl Ecol, CICESE, Programa Nacl Mamoferos, Ensenada, Baja California, MexicoSchaeff, CM, American Univ, Dept Biol, Hurst Hall 101,4400 Massachusetts Ave NW, Washington, DC 20016 USA TI - Mitochondrial DNA variation among Eastern North Pacific gray whales (Eschrichtius robustus) on winter breeding grounds in Baja California AB - In this study, we Used genetic data to investigate the role of female-directed philopatry in winter habitat use patterns among female eastern North Pacific gray whales (Eschrichtius robustus) in calving years. Analysis of 306 base pairs of the mitochondrial DNA control region for 83 animals Sampled from, two geographically discrete winter breeding and calving lagoons revealed 28 haplotypes (nucleotide diversity (pi) = 0.02, haplotype diversity (h) = 0.95). Significant differences in haplotype (F-ST) and nucleotide (Phi(ST)) frequencies Were detected between Laguna San Ignacio cows (n = 42) and a random sample of non-lagoon females (n = 25; F-ST = 0.064, p < 0-01; Phi(ST) = 0.041, p = 0.043) and between cows and single females (n = 11; F-ST = 0-027, p = 0.044; Phi(ST) = 0.088, p = 0.034) in Laguna San Ignacio. Significant differences in haplotype, but not nucleotide, frequencies were also detected between cows in Laguna Ojo de Liebre (Scammon's Lagoon) and non-lagoon females (n = 10; F-ST = 0.074, p < 0.01) and between'single females (n 11) or adult males (n = 13) in Laguna San Ignacio and their non-lagoon counterparts (n(females) = 25, F-ST = 0.07, p < 0.01; n(males) = 28, F-ST = 0.08, p < 0.01). These data suggest that all animals exhibit some level of site fidelity to their natal lagoons as adults, and that the eastern North Pacific gray whale population may be substructured on the population's wintering grounds MH - USA MH - Mexico|Baja California PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 3 U4 - Zoology U5 - J;Article AV - English IS - 0008-4301 UR - ISI:000189089300007 L2 - GENETIC POPULATION-STRUCTURE; ATLANTIC HUMPBACK WHALES; MEGAPTERA-NOVAEANGLIAE; EUBALAENA-GLACIALIS; CONTROL REGION; HAPLOTYPES; SEX SO - Canadian Journal of Zoology-Revue Canadienne de Zoologie 2003 ;81(12):1965-1972 8133 UI - 4777 AU - Golberg D AU - Dorozhkin PS AU - Bando Y AU - Dong ZC AU - Tang CC AU - Uemura Y AU - Grobert N AU - Reyes-Reyes M AU - Terrones H AU - Terrones M AD - Natl Inst Mat Sci, Nanomat Lab, Tsukuba, Ibaraki 3050044, JapanMax Planck Inst Met Res, D-70569 Stuttgart, GermanyIPICYT, San Luis Potosi 78210, MexicoInst Solid State Phys, Chernogolovka 142432, Moscow Reg, RussiaGolberg, D, Natl Inst Mat Sci, Nanomat Lab, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan TI - Structure, transport and field-emission properties of compound nanotubes: CNx vs. BNCx (x < 0.1) AB - Transport and field-emission properties of as-synthesized CNx and BNCx (x < 0.1) multi-walled nanotubes were compared in detail. Individual ropes made of these nanotubes and macrofilms of those were tested. Before measurements, the nanotubes were thoroughly characterized using high-resolution and energy-filtered electron microscopy, electron diffraction and electron-energy-loss spectroscopy. Individual ropes composed of dozens of CNx nanotubes displayed well-defined metallic behavior and low resistivities of similar to10-100 kOmega or less at room temperature, whereas those made of BNCx nanotubes exhibited semiconducting properties and high resistivities of similar to50-300 MOmega. Both types of ropes revealed good fieldemission properties with emitting currents per rope reaching similar to4 muA (CNx) and similar to2 muA (BNCx), albeit the latter ropes severely deteriorated during the field emission. Macrofilms made of randomly oriented CNx or BNC, nanotubes displayed low and similar turn-on fields of similar to2-3 V/mum. 3 mA/cm(2) (BNC,) and 5.5 mA/cm(2) (CNx) current densities were reached at 5.5 V/mum macroscopic fields. At a current density of 0.2-0.4 mA/cm(2) both types of compound nanotubes exhibited equally good emission stability over tens of minutes; by contrast, on increasing the current density to 0.2-0.4 A/cm(2) only CNx films continued to emit steadily, while the field emission from BNCx nanotube films was prone to fast degradation within several tens of seconds, likely due to arcing and/or resistive heating MH - Germany MH - Japan MH - Mexico|San Luis Potosi MH - Russia PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 25 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000181805800009 L2 - B-C-N; BORON-NITRIDE NANOTUBES; DOPED CARBON NANOTUBES; ALIGNED BXCYNZ NANOTUBES; ELECTRONIC-PROPERTIES; ELECTRICAL BREAKDOWN; CURRENT SATURATION; ARC-DISCHARGE; GROWTH; LAYERS SO - Applied Physics A-Materials Science & Processing 2003 ;76(4):499-507 8134 UI - 9194 AU - Golberg D AU - Dorozhkin PS AU - Bando Y AU - Dong ZC AU - Grobert N AU - Reyes-Reyes M AU - Terrones H AU - Terrones M AD - Natl Inst Mat Sci, Nanomat Lab, Tsukuba, Ibaraki 3050044, JapanMax Planck Inst Met Res, D-70569 Stuttgart, GermanyIPICYT, San Luis Potosi 78210, MexicoGolberg, D, Natl Inst Mat Sci, Nanomat Lab, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan TI - Cables of BN-insulated B-C-N nanotubes AB - Nanotubular ropes composed of aligned multiwalled nanotubes having electrically insulating BN-rich outer shells and semiconducting B-C-N inner shells were synthesized through the reaction of aligned CNx (xless than or equal to0.1) nanotube mats with boron oxide and nitrogen at similar to2000-2110 K. The atomic structure and chemical composition of the ropes were analyzed by high-resolution transmission and energy-filtered (Omega filter) electron microscopy. Individual ropes display perfect insulating performance of BN-rich outer layers and excellent field emission and thus conductive properties of inner B-C-N layers. A semiconducting nanometer-scale cable with built-in electrical insulation has thus been realized. (C) 2003 American Institute of Physics MH - Germany MH - Japan MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000181066000045 L2 - CARBON NANOTUBES; BORON-NITRIDE; BXCYNZ NANOTUBES; NANOSTRUCTURES; NANOPARTICLES; NANOFIBERS; CIRCUITS; LAYERS SO - Applied Physics Letters 2003 ;82(8):1275-1277 8135 UI - 8000 AU - Goldberg SR AU - Bursey CR AU - Camarillo-Rangel JL AD - Whittier Coll, Dept Biol, Whittier, CA 90608, USAPenn State Univ, Dept Biol, Sharon, PA 16146, USAUniv Nacl Autonoma Mexico, Lab & Colecc Herpetol, Escuela Nacl Estudios Profes Iztacala, Tlalnepantla, Estado De Mexic, MexicoGoldberg, SR, Whittier Coll, Dept Biol, Whittier, CA 90608, USA TI - Cosmocercella haberi (Nematoda : Ascaridida : Cosmocercoidea) in the ridged treefrog, Hyla plicata (Anura : Hylidae), from Mexico MH - Mexico|Estado De Mexico MH - USA PB - LUBBOCK: TEXAS ACAD SCI RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0040-4403 UR - ISI:000183917700007 L2 - PARASITES; HELMINTHS; ARIZONA SO - Texas Journal of Science 2003 ;55(2):183-185 8136 UI - 8001 AU - Goldberg SR AU - Camarillo-Rangel JL AD - Whittier Coll, Dept Biol, Whittier, CA 90608, USAUniv Nacl Autonoma Mexico, Lab & Colecc Herpetol, Escuela Nacl Estudios Profes Iztacala, Tlalnepantla, Estado De Mexic, MexicoGoldberg, SR, Whittier Coll, Dept Biol, Whittier, CA 90608, USA TI - Reproduction in Gerrhonotus ophiurus (Sauria : Anguidae), from Veracruz, Mexico MH - Mexico|Estado De Mexico MH - USA PB - LUBBOCK: TEXAS ACAD SCI RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0040-4403 UR - ISI:000183917700008 SO - Texas Journal of Science 2003 ;55(2):185-189 8137 UI - 8007 AU - Goldberg SR AU - Bursey CR AU - Camarillo-Rangel JL AD - Whittier Coll, Dept Biol, Whittier, CA 90608, USAPenn State Univ, Dept Biol, Sharon, PA 16146, USAUniv Nacl Autonoma Mexico, Escuela Nacl Estudios Profesionales Iztacala, Conservac & Mejoramiento Ambiente, Lab & Colecc Herpetol, Tlalnepantla, Estado de Mexic, MexicoGoldberg, SR, Whittier Coll, Dept Biol, Whittier, CA 90608, USA TI - Gastrointestinal helminths of seven species of sceloporine lizards from Mexico AB - We examined 404 specimens representing 7 species of sceloporine lizards from Mexico (Sceloporus formosus, S. grammicus, S. megalepidurus, S. mucronatus, S. parvus, S. torquatus, and S. variabilis) for helminths. Two species of Cestoda (Oochoristica scelopori and Mesocestoides larvae) and 9 species of Nematoda (Atractis penneri, Physaloptera retusa, Spauligodon giganticus, S. oxkutzcabiensis, Strongyluris similis, Thubunaea intestinalis, Ascarops larvae, Physocephalus larvae, and Acuariidea larvae) were found. The mean number of helminth species for each species of lizard was 4.7 +/- 1.5 SD (range = 3 to 7). Twenty-six new host records and 23 new locality records are reported MH - Mexico|Estado De Mexico MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 9 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000183937100004 L2 - YARROWS SPINY LIZARD; SP-N NEMATODA; CTENOSAURA-PECTINATA; MONTHLY PREVALENCES; PHRYNOSOMATIDAE; IGUANIDAE; ARIZONA; PHARYNGODONIDAE; OXYUROIDEA; SAURIA SO - Southwestern Naturalist 2003 ;48(2):208-217 8138 UI - 7344 AU - Gomez-Gil B AU - Thompson FL AU - Thompson CC AU - Swings J AD - CIAD, Mazztlan Unit Aquaculture, Mazatlan 82000, Sinaloa, MexicoState Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumState Univ Ghent, Microbiol Lab, BCCM LMG Bacteria Collect, B-9000 Ghent, BelgiumGomez-Gil, B, CIAD, Mazztlan Unit Aquaculture, AP 711, Mazatlan 82000, Sinaloa, Mexico TI - Vibrio pacinii sp nov., from cultured aquatic organisms AB - Three strains were isolated from cultured aquatic organisms. They were Gram-negative, oxidase-positive, motile, fermentative, arginine dihydrolase-positive, lysine and ornithine decarboxylase-negative and sensitive to vibriostatic agent O/129. These strains differ from other related Vibrio species by several phenotypic features, which include acetoin and indole production and utilization of amygdalin and D-mannitol. Comparison of 16S rDNA sequences showed a close relationship to the recently described species Vibrio kanaloae (96.6 %) and Vibrio pomeroyi (96.4 %) and to Vibrio furnissii (96.6 %), but DNA-DNA hybridization experiments showed that the three isolates form a tight novel species with less than or equal to 30 % DNA-DNA similarity to its closest phylogenetic neighbours. Vibrio pacinii sp. nov. is proposed, with LMG 19999(T) (= CAIM 530(T) =STD3-1057(T); DNA G + C content, 44.9 mol%) as the type strain MH - Belgium MH - Mexico|Sinaloa PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000185551100052 L2 - BIOCHEMICAL-IDENTIFICATION; SEQUENCE ALIGNMENT; BACTERIA; ACID; DIVERSITY; SYSTEMS; STRAINS; TOOLS; KEYS; SET SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():1569-1573 8139 UI - 9103 AU - Gomez-Gil B AU - Thompson FL AU - Thompson CC AU - Swings J AD - CIAD, Mazatlan Unit Aquaculture, Mazatlan 82000, Sinaloa, MexicoState Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumState Univ Ghent, BCCMTM LMG Bacteria Collect, B-9000 Ghent, BelgiumGomez-Gil, B, CIAD, Mazatlan Unit Aquaculture, AP 711, Mazatlan 82000, Sinaloa, Mexico TI - Vibrio rotiferianus sp nov., isolated from cultures of the rotifer Brachionus plicatilis AB - Five Gram-negative bacterial strains, oxidase-positive, motile by means of more than one polar flagella, facultative anaerobe, arginine dihydrolase-negative, lysine- and ornithine decarboxylase-positive, sensitive to the vibriostatic agent O/129, were isolated from a flow-through rotifer culture system in Gent, Belgium, and previously characterized by fluorescent amplified fragment length polymorphism. Comparison of the 16S rDNA sequence of strain LMG 21460(T) indicated close relationships (similar to99% similarity) to Vibrio campbellii, Vibrio harveyi, Vibrio alginolyticus and Vibrio parahaemolyticus. However, DNA hybridization experiments revealed similarity values below 70% with its closest species V. campbellii and V. harveyi. Additionally, the analysed strains differ from related Vibrio species by the utilization of melibiose and production of acid from L-arabinose and annygdalin. Among the strains analysed, differences were observed in some phenotypic characters, particularly susceptibility to ampicillin, polymyxin B and amikacin, and urease activity. The major fatty acids identified were 16: 0, 18: 1omega7c, 14: 0, 12: 0 3-OH and 18: 0. Vibrio rotiferianus sp. nov. is proposed, with type strain LMG 21460T (=CAIM 577(T)); it has a DNA G+C content of 44-5+/-0.01 mol% MH - Belgium MH - Mexico|Sinaloa PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000181169300036 L2 - DNA-DNA HYBRIDIZATION; IDENTIFICATION; BACTERIA; ACID; SYSTEM; TOOLS SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():239-243 8140 UI - 6904 AU - Gomez-Gutierrez J AD - Ctr Interdisciplinario Ciencias Marinas, Dept Plancton & Ecol Marina, La Paz 23000, Baja California, MexicoGomez-Gutierrez, J, Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA TI - Hatching mechanism and accelerated hatching of the eggs of a sac-spawning euphausiid Nematoscelis difficilis AB - Observation of the sac-spawning euphausiid Nematoscelis difficilis Hansen during shipboard laboratory) incubations showed that its embryos usually hatch as pseudometanauplius (PMN) or metanauplius (MN). The eggs, which have a minute perivitelline space, are spherical at spawning and become elliptical after the nauplius 1 develops. When ready to hatch, the PMN or MN embryos extend and contract their first and second antennae in a swimming movement, breaking the chorion into almost equal halves joined by one small section in the anterior part of the chorion. The mandibles play a secondary role in cutting the chorion. Then the embryo pushes itself backwards with the first and second antennae to escape from the chorion. This is known as push-off hatching. The embryos always hatch progressively from the distal end towards the proximal end of the ovigerous sac. The time between hatching of the first and last embryo may reflect the time the females require to lay a clutch of eggs (<2.1 h). Development time to the PMN stage at 10 degreesC was similar to55-60 h and to MN stage similar to84 h. Eggs of one brood of N. difficilis hatched backwards at 47 h as nauplius 2 (N2) rather than as PMN or MN. This is the second observation of early hatching by any sac-spawning euphausiid species. Therefore, a morphological description is provided of the free-swimming N. difficilis N2. It is expected that N. difficilis N2 could be found in the ocean, a taxonomic complication for the identification of nauplii, and therefore a comparison is made with N2 stages of three of the most abundant broadcast-spawning euphausiid species (Euphausia pacifica, Thysanoessa spinifera and Thysanoessa inspinata) in the same geographical range. This is also the first description of the N2 for T. inspinata. Both sac-spawning and broadcast-spawning strategies in euphausiids have shown high flexibility in the hatching schedule. However, early hatching in sac-spawners and late hatching in broadcast-spawners are usually associated with low embryo hatching success MH - Mexico|Baja California MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0142-7873 UR - ISI:000186657200008 L2 - NYCTIPHANES-SIMPLEX; CALIFORNIA CURRENT; LARVAL DEVELOPMENT; SUPERBA DANA; EL-NINO; ZOOPLANKTON; ABUNDANCE; BIOLOGY; OCEAN; STAGE SO - Journal of Plankton Research 2003 ;25(11):1397-1411 8141 UI - 8010 AU - Gomez-Gutierrez J AU - Peterson WT AU - De Robertis A AU - Brodeur RD AD - Ctr Interdisciplinario Ciencias Marinas, La Paz 23096, BCS, MexicoOregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331, USANatl Marine Fisheries Serv, Natl Ocean & Atmospher Adm, NW Fisheries Sci Ctr, Newport, OR 97365, USAGomez-Gutierrez, J, Ctr Interdisciplinario Ciencias Marinas, La Paz 23096, BCS, Mexico TI - Mass mortality of krill caused by parasitoid ciliates MH - Mexico|Baja California Sur MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000184207300034 L2 - EUPHAUSIID THYSANOESSA-INERMIS SO - Science 2003 ;301(5631):339-339 8142 UI - 9418 AU - Gomez-Lagunas F AU - Melishchuk A AU - Armstrong CM AD - Natl Autonomous Univ Mexico, Sch Med, Mexico City 04510, DF, MexicoUniv Penn, Med Ctr, Dept Physiol, Philadelphia, PA 19104, USAArmstrong, CM, Natl Autonomous Univ Mexico, Sch Med, Mexico City 04510, DF, Mexico TI - Block of Shaker potassium channels by external calcium ions AB - We describe an interaction between external Ca2+ ions and Shaker K channels that is important in the gating of the channels. The interaction was first detected as a partial block of inward K+ current in elevated Ca2+, beginning near -40 mV and becoming stronger at more negative voltage. Surprisingly, the time course of the block can be resolved as a rapid decay of inward current magnitude following a repolarizing step. The rapid decay of current is shown to be the result of channel block by using a two-pulse procedure that monitors the time course of gate closing. As a result of block, the decay of the tail current after repolarization is two to three times faster than gate closing. With physiological values for voltage and calcium concentration, block is readily detectable from tail time course, implying that it occurs as a normal concomitant of gate closing in Shaker. The slight voltage dependence of block from -60 to -100 mV suggests that Ca2+ is bound (with low affinity) near the outer mouth of the channel. Elevated calcium quickens the inward gating current recorded as Shaker channels are closing; this current approximately doubles in amplitude and has a faster time course and quicker rising phase. When combined, the results suggest that calcium accelerates the first step in closing of the channel gate, perhaps by changing the channel's ion-occupancy state MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000180307100062 L2 - K channel;ion channel;gating current;activation gate;GATING CHARGE MOVEMENT; K+ CHANNEL; SODIUM-CHANNELS; INACTIVATION; ACTIVATION; MECHANISM; CURRENTS SO - Proceedings of the National Academy of Sciences of the United States of America 2003 ;100(1):347-351 8143 UI - 6814 AU - Gomez-Lojero C AU - Perez-Gomez B AU - Shen GZ AU - Schluchter WM AU - Bryant DA AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Bioquim, Mexico City 07000, DF, MexicoPenn State Univ, Dept Biochem & Mol Biol, University Pk, PA 16802, USAUniv New Orleans, Dept Biol Sci, New Orleans, LA 70148, USAGomez-Lojero, C, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Bioquim, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Interaction of ferredoxin : NADP(+) oxidoreductase with phycobilisomes and phycobilisome substructures of the cyanobacterium Synechococcus sp strain PCC 7002 AB - The enzyme ferredoxin-NADP(+) oxidoreductase (FNR) from Synechococcus sp. PCC 7002 has an extended structure comprising three domains (FNR-3D) (Schluchter, W. M., and Bryant, D. A. (1992) Biochemistry 31, 3092-3102). Phycobilisome (PBS) preparations from wild-type cells contained from 1.0 to 1.6 molecules of FNR-3D per PBS, with an average value of 1.3 FNR per PBS. A maximum of two FNR-3D molecules could be specifically bound to wild-type PBS via the N-terminal, CpcD-like domain of the enzyme when exogenous recombinant FNR-3D (rFNR-3D) was added. To localize the enzyme within the PBS, the interaction of PBS and their substructures with rFNR-3D was further investigated. The binding affinity of rFNR-3D for phycocyanin (PC) hexamers, which contained a 22-kDa proteolytic fragment derived from CpcG, the L-RC(27) linker polypeptide, was higher than its affinity for PC hexamers containing no linker protein. PBS from a cpcD3 mutant, which lacks the 9-kDa, PC-associated rod linker, incorporated up to six rFNR-3D molecules per PBS. PBS of a cpcC mutant, which has peripheral rods that contain single PC hexamers, also incorporated up to six rFNR-3D molecules per PBS. Direct competition binding experiments showed that PBS from the cpcD3 mutant bound more enzyme than PBS from the cpcC mutant. These observations support the hypothesis that the enzyme binds preferentially to the distal ends of the peripheral rods of the PBS. These data also show that the relative affinity order of the PC complexes for FNR-3D is as follows: (alpha(PC)beta(PC))(6)-L-R(33) > (alpha(PCx)beta(PC))(6)-L-RC(27), > (alpha(PC)beta(PC))(6). The data suggest that, during the assembly of the PBS, FNR-3D could be displaced to the periphery according to its relative binding affinity for different PC subcomplexes. Thus, FNR-3D would not interfere with the light absorption and energy transfer properties of PC in the peripheral rods of the PBS. The implications of this localization of FNR within the PBS with respect to its function in cyanobacteria are discussed MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0006-2960 UR - ISI:000186846800002 L2 - SYNECHOCYSTIS PCC 6803; N-TERMINAL DOMAIN; PETH GENE-PRODUCT; NADP+ OXIDOREDUCTASE; LINKER POLYPEPTIDE; MASTIGOCLADUS-LAMINOSUS; CYANOPHORA-PARADOXA; THYLAKOID MEMBRANES; ANABAENA-VARIABILIS; SPIRULINA-MAXIMA SO - Biochemistry 2003 ;42(47):13800-13811 8144 UI - 8744 AU - Gomez-Montes L AU - Garcia-Esquivel Z AU - D'Abramo LR AU - Shimada A AU - Vasquez-Pelaez C AU - Viana MT AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22860, Baja California, MexicoUNAM, Fac Med Vet & Zootecn, Mexico City, DF, MexicoUNAM, Fac Estudios Super Cuatutitlan, Lab Rumiol & Metab Nutr, Ajuchitlan, Qro, MexicoMississippi State Univ, Dept Wildlife & Fisheries, Mississippi State, MS 39762, USAUNAM, Program Maestria, Mexico City, DF, MexicoUNAM, Doctorado Ciencias Prod Salud Anim, Mexico City, DF, MexicoViana, MT, Univ Autonoma Baja California, Inst Invest Oceanol, POB 453, Ensenada 22860, Baja California, Mexico TI - Effect of dietary protein : energy ratio on intake, growth and metabolism of juvenile green abalone Haliotis fulgens AB - dJuvenile green abalone Haliotis rufescens were grown under laboratory conditions at 21 +/- 1 degreesC and fed formulated diets consisting of different protein:energy ratios (mg protein/kcal), 62, 74, 85, 100, 108, for 60 days. The level of crude protein ranged from approximately 26% to 44% while the energy content remained constant at about 4.1 kcal g(-1). Growth ranged from 3.63 to 12.33 mg day(-1). The growth of abalone fed the 100 and 108 diets was significantly greater than that of each of the other diets. Protein efficiency ratio increased as the dietary protein content increased except for the T108 diet (44% crude protein). Abalone apparently consume food to satisfy an energy requirement. Caloric expenditure due to metabolism was estimated for abalone fed diets with protein ratios of 62, 85, 100. Energy loss due to respiration did not vary appreciably among abalone fed the different diets. The proportional distribution of dietary energy into fecal, digestible, growth, and metabolic energy was estimated for abalone fed these diets. Apparent dry matter digestibility was among the lowest for abalone fed the 100 P:E diet, but growth of abalone fed this diet was significantly higher than that of each of the other treatments except the 108 diet. Unexplained energy loss to achieve balance ranged from 7% to 28.5%, some of which is probably due to differential mucus and ammonia production. Results suggest a potential for the reduction of both dietary protein and lipid without causing any adverse effects on the growth response. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000182099100058 L2 - abalone;protein : energy ratio;metabolism;nutrition;physiology;SOUTH-AFRICAN ABALONE; DISCUS-HANNAI INO; TUBERCULATA L; BODY-COMPOSITION; FISH-MEAL; LEVEL; MIDAE; FEED; DIGESTIBILITY; PERFORMANCE SO - Aquaculture 2003 ;220(1-4):769-780 8145 UI - 4779 AU - Gomez-Soberon JMV AD - Tech Univ Catalonia, Barcelona, SpainNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoUniv Autonoma Puebla, Puebla 72570, MexicoGomez-Soberon, JMV, Tech Univ Catalonia, Barcelona, Spain TI - Relationship between gas adsorption and the shrinkage and creep of recycled aggregate concrete AB - In this work, an experimental analysis is described of specimens of recycled concrete (RC) made with replacement of natural aggregate with recycled aggregate originating from concrete (RCA). An experimental analysis to obtain the shrinkage and creep properties (basic and by drying) of RC was performed. The replacement fraction of natural aggregate with RCA were 0 %, 15 %, 30 %, 60 % and 100 % and the test conditions were 50 % RH and 20 degreesC. The results of these trials were compared with mercury intrusion porosimetry (MIP) and gas adsorption (nitrogen) tests, at 90 days. In the results, an increase in the shrinkage and creep properties of the RC with respect to conventional concrete was observed, while porosity values increased. However, the deformation evolution over time is similar to conventional concrete MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - W CONSHOHOCKEN: AMER SOC TESTING MATERIALS RP - NOT IN FILE U3 - TC 2 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0149-6123 UR - ISI:000223096600003 L2 - creep;gas adsorption;Mercury intrusion porosimetry;porosity;recycled concrete;recycled concrete aggregate;shrinkage SO - Cement Concrete and Aggregates 2003 ;25(2):42-48 8146 UI - 7713 AU - Gomez-Tagle J AU - Wahid PF AU - Chryssomallis MT AU - Christodoulou CG AD - Inst Technol Estudios Super Monterrey, Guadalajara, Jalisco, MexicoUniv Cent Florida, ECE Dept, Orlando, FL 32826, USADemocritus Univ Thrace, ECE Dept, GR-67100 Xanthi, GreeceUniv New Mexico, EECE Dept, Albuquerque, NM 87131, USAGomez-Tagle, J, Inst Technol Estudios Super Monterrey, Guadalajara, Jalisco, Mexico TI - FDTD analysis of finite-sized phased array microstrip antennas AB - This paper describes the application of the finite-difference time-domain method (FDTD) for calculating the active reflection coefficient of finite-sized phased array antennas consisting of microstrip elements fed with coaxial probes. The main contribution of this work is the determination of the active impedance for different scan conditions MH - Greece MH - Mexico|Jalisco MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0018-926X UR - ISI:000184769400041 L2 - finite-difference time-domain method (FDTD);microstrip antennas;phased arrays;TIME-DOMAIN METHOD; BOUNDARY-CONDITIONS; REFLECTION ANALYSIS SO - Ieee Transactions on Antennas and Propagation 2003 ;51(8):2057-2062 8147 UI - 7715 AU - Gomez-Tuena A AU - LaGatta AB AU - Langmuir CH AU - Goldstein SL AU - Ortega-Gutierrez F AU - Carrasco-Nunez G AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76230, MexicoColumbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10960, USAHarvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138, USAColumbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10960, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoGomez-Tuena, A, Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76230, Mexico TI - Temporal control of subduction magmatism in the eastern Trans-Mexican Volcanic Belt: Mantle sources, slab contributions, and crustal contamination AB - The magmatic record of the easternmost part of the Trans-Mexican Volcanic Belt elucidates how temporal changes in subduction parameters influence convergent margin volcanism. In the Palma Sola massif, three phases of magmatic rocks with distinct chemical characteristics were emplaced in a relatively short time span (similar to17 Ma): Miocene calc-alkaline plutons, latest Miocene-Pleistocene alkaline plateau basalts, and Quaternary calc-alkaline cinder cones. Plutons have arc-like trace element patterns (Ba/Nb=16-101), and their Sr, Nd, and Pb isotopic compositions become more "depleted'' with increasing SiO2 contents. Their Pb isotopes are bracketed by the subducted sediments and Pacific mid-ocean ridge basalts (MORB), requiring the participation of an unradiogenic component that mixes with a sediment contribution. High Sr/Y and Gd/Yb ratios in the least radiogenic pluton might indicate a melt coming from the subducted MORB. Trace element patterns of the plateau basalts show moderate or negligible subduction contributions (Ba/Nb=6-31). Rocks without subduction signatures are similar to ocean island basalts, indicating melting of an enriched mantle wedge. The plateau basalts form an array in Pb-206/Pb-204-Pb-207/Pb-204 space that trends toward the composition of the subducted sediment. The sediment component is also indicated by the inverse correlations between Pb isotopes and subduction signals. This component has high Th/Nd coupled with low Nd-143/Nd-144, but lower Pb/Nd and Sr/Nd ratios than the bulk sediment. These suggest melting of a sediment that has lost fluid mobile elements prior to melting. The Quaternary cinder cones have moderate subduction signals (Ba/Nb=16-41), and their isotopic compositions correlate with differentiation indices. Contamination with the local Paleozoic basement can explain the petrogenesis of the youngest rock suite. The geochemical differences among the suites indicate temporal modifications in the chemical characteristics of the slab input. These variations can be associated with modifications in the Pacific subduction regime. We suggest the Miocene magmatic phase was formed by an essentially flat subduction angle that favored melting of the subducted oceanic crust. Slab rollback in the Pliocene allowed melting of deeper portions of the wedge by the injection of dehydrated sediment melts. In the Quaternary, an even steeper subduction angle provided negligible slab contributions to the Palma Sola region, and upper crustal contamination largely controls the petrogenesis MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1525-2027 UR - ISI:000184804500001 L2 - subduction zone magmatism;slab melt;sediment melt;mantle wedge;mineralogy and petrology : igneous petrology;geochemistry : isotopic composition/chemistry;geochemistry : trace elements;SAN-LUIS-POTOSI; TRACE-ELEMENT SIGNATURES; PRIMITIVE CALC-ALKALINE; ARC MAGMAS; MELT/ROCK REACTION; MAFIC VOLCANISM; PACIFIC RISE; CONSTRAINTS; ROCKS; GEOCHEMISTRY SO - Geochemistry Geophysics Geosystems 2003 ;4(): 8148 UI - 7570 AU - Gomez I AU - Dean DH AU - Bravo A AU - Soberon M AD - UNAM, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62250, Morelos, MexicoOhio State Univ, Dept Biochem, Columbus, OH 43210, USASoberon, M, UNAM, Inst Biotechnol, Dept Mol Microbiol, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Molecular basis for Bacillus thuringiensis Cry1Ab toxin specificity: Two structural determinants in the Manduca sexta Bt-R-1 receptor interact with loops alpha-8 and 2 in domain II of Cy1Ab toxin AB - The identification of epitopes involved in Cry toxin-receptor interaction could provide insights into the molecular basis of insect specificity and for designing new toxins to overcome the potential problem of insect resistance. In previous works, we determined that the Manduca sexta Cry I A cadherin-like receptor (Bt-R-1) interacts with Cry I A toxins through epitope (NITIHITDTNN875)-N-865 and by loop 2 of domain 11 in the toxin (Gomez, I., Miranda-Rios, J., Rudino-Pinera, E., Oltean, D. I., Gill, S. S., Bravo, A., and Soberon, M. (2002) J. Biol. Chem. 277, 30137-30143.). In this work, we narrowed to 12 amino acids a previously identified Bt-R-1 66 amino acids epitope (Dorsch, J. A., Candas, M., Griko, N. B., Maaty, W. S. A., Midbo, E. G., Vadlamudi, R. K., and Bulla, L. A., Jr. (2002) Insect Biochem. Mol. Biol. 32, 1025-1036) and identified loop alpha-8 of Cry1Ab domain 11 as its cognate binding epitope. Two amino acid Bt-R-1 toxin binding regions of 70 residues, one comprised of residues 831-900 containing the (NITIHITDTNN875)-N-875 epitope (TBR 1) and the other comprised of residues 1291-1360 (TBR2) were cloned by RT-PCR and produced in Escherichia coli. Cry1A toxins bind with the two TBR regions in contrast with the nontoxic Cry3A toxin. The loop 2 synthetic peptide competed with the binding of Cry I Ab toxin to both TBR regions in contrast to the alpha-8 synthetic peptide that only competed with Cry1Ab binding to TBR2. Western blots and competition ELISA analysis showed that the Cry1Ab loop 2 RR368-9EE mutant did not show observable binding to TBR1 but still bound the TBR2 peptide. This result suggests that loop a-8 interacts with the TBR2 region. Competition ELISA analysis of Cry1Ab binding to the two TBR peptides revealed that the toxin binds the TBR1 region with 6-fold higher affinity than the TBR2 region. The amino acid sequence of TBR2 involved on Cry1Ab interaction was narrowed to 12 amino acids, (1331)IPLPASILTVTV(1342), by using synthetic peptides as competitors for Cry1Ab binding to Bt-R-1. Our results show that the specificity of Cry1A involves at least two structural determinants on both molecules MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0006-2960 UR - ISI:000185170300016 L2 - BRUSH-BORDER MEMBRANE; DISPAR AMINOPEPTIDASE-N; SITE-DIRECTED MUTATIONS; DELTA-ENDOTOXIN; HELIOTHIS-VIRESCENS; HYDROPATHIC COMPLEMENTARITY; BOMBYX-MORI; PORE FORMATION; SUBSTANCE-P; IRREVERSIBLE BINDING SO - Biochemistry 2003 ;42(35):10482-10489 8149 UI - 7947 AU - Gomez J AU - Campbell AT AU - Naghshineh M AU - Bisdikian C AD - Natl Autonomous Univ Mexico, Dept Elect Engn, Mexico City 04510, DF, MexicoIBM TJ Watson Res Ctr, Hawthorne, NY 10953, USAGomez, J, Natl Autonomous Univ Mexico, Dept Elect Engn, Ciudad Univ, Mexico City 04510, DF, Mexico TI - PARO: Supporting dynamic power controlled routing in wireless ad hoc networks AB - This paper introduces PARO, a dynamic power controlled routing scheme that helps to minimize the transmission power needed to forward packets between wireless devices in ad hoc networks. Using PARO, one or more intermediate nodes called "redirectors" elects to forward packets on behalf of source - destination pairs thus reducing the aggregate transmission power consumed by wireless devices. PARO is applicable to a number of networking environments including wireless sensor networks, home networks and mobile ad hoc networks. In this paper, we present the detailed design of PARO and evaluate the protocol using simulation and experimentation. We show through simulation that PARO is capable of outperforming traditional broadcast-based routing protocols (e.g., MANET routing protocols) due to its energy conserving point-to-point on-demand design. We discuss our experiences from an implementation of the protocol in an experimental wireless testbed using off-the-shelf radio technology. We also evaluate the impact of dynamic power controlled routing on traditional network performance metrics such as end-to-end delay and throughput MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Information Systems;Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1022-0038 UR - ISI:000184041400004 L2 - power optimization;power control;ad hoc networks;routing protocols SO - Wireless Networks 2003 ;9(5):443-460 8150 UI - 8528 AU - Gomez JL AU - Nieto-Ceron S AU - Campoy FJ AU - Munoz-Delgado E AU - Vidal CJ AD - Univ Murcia, Dept Bioquim & Biol Mol A, Edificio Vet, E-30071 Murcia, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Unidad Iztapalapa, Mexico City 09340, DF, MexicoVidal, CJ, Univ Murcia, Dept Bioquim & Biol Mol A, Edificio Vet, Apto 4021, E-30071 Murcia, Spain TI - Purification and properties of hydrophilic dimers of acetylcholinesterase from mouse erythrocytes AB - Differences in the glycosylation of acetylcholinesterase (AChE) subunits which form the dimers of mouse erythrocyte and a suitable procedure to purify the enzyme by affinity chromatography in edrophonium-Sepharose are described. AChE was extracted (similar to80%) from erythrocytes with Triton X-100 and sedimentation analyses showed the existence of amphiphilic AChE dimers in the extract. The AChE dimers were converted into monomers by reducing the disulfide bond which links the enzyme subunits. Lectin interaction studies revealed that most of the dimers were bound by concanavalin A (ConA) (90-95%), Lens culinaris agglutinin (LCA) (90-95%), and wheat germ (Triticum vulgaris) agglutinin (WGA) (70-75%), and a small fraction by Ricinus communis agglutinin (RCA(120)) (25-30%). The lower level of binding of the AChE monomers with WGA (55-60%), and especially with RCA (10-15%), with respect to the dimers, reflected heterogeneity in the sugar composition of the glycans linked to each AChE subunit in dimers. Forty per cent of the amphiphilic AChE dimers lost the glycosylphosphatidylinositol (GPI) and, therefore, were converted into hydrophilic forms, by incubation with phosphatidylinositol-specific phospholipase C (PIPLC), which permitted their separation from the amphiphilic variants in octyl-Sepharose. Only the hydrophilic dimers, either isolated or mixed with the amphiphilic forms, were bound by edrophonium-Sepharose, which allowed their purification (4800-fold) with a specific activity of 7700 U/mg protein. The identification of a single protein band of 66 kDa in gel electrophoresis demonstrates that the procedure can be used for the purification of GPI-anchored AChE, providing that the attached glycolipid domain is susceptible to PIPLC. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1357-2725 UR - ISI:000182765100014 L2 - affinity chromatography;glycosylation;glycophospholipid anchor;splitting of acetylcholinesterase dimers into monomers;BOVINE SERUM ACETYLCHOLINESTERASE; AFFINITY-CHROMATOGRAPHY; MOLECULAR-FORMS; SOLUBLE ACETYLCHOLINESTERASE; AMPHIPHILIC PROPERTIES; MEMBRANE ANCHOR; BUTYRYLCHOLINESTERASE; BRAIN; CHOLINESTERASES; MUSCLE SO - International Journal of Biochemistry & Cell Biology 2003 ;35(7):1109-1118 8151 UI - 6985 AU - Gomez M AU - Hern L AU - Ashizawa T AU - Alonso E AU - Rasmussen A AU - Bidichandani SI AD - Natl Inst Neurol, Mexico City, DF, MexicoUniv Texas, Med Branch, Galveston, TX 77550, USAUniv Oklahoma, Hlth Sci Ctr, Dept Biochem & Mol Biol, Oklahoma City, OK, USA TI - Aprataxin mutations are not a significant cause of recessive ataxia in the Mexican Mestizo population MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599702226 SO - American Journal of Human Genetics 2003 ;73(5):548-548 8152 UI - 8775 AU - Gomez S AU - del Castillo N AU - Castellanos L AU - Solano J AD - UNAM, IIMAS, Mexico City 01000, DF, MexicoICIMAF, Vedado Cd De La Habana, CubaGomez, S, UNAM, IIMAS, Apdo Postal 20-726, Mexico City 01000, DF, Mexico TI - The parallel tunneling method AB - This paper describes the parallel version of the tunneling methods for global optimization of bounded constrained problems, taking advantage of the stochastic element of these methods that allows a smart exploration of the space. When the search for a point in another valley starting from points in a neighbourhood of the last (and best) local minimum along random directions, is performed at the same time on several processors, a more efficient and fast global optimization method is obtained. The performance of the parallel method is illustrated on several academic problems and on the specially difficult Lennard-Jones molecular structures problem. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0167-8191 UR - ISI:000182061100010 L2 - global optimization;tunneling methods;parallel implementation;Lennard-Jones clusters;ATOMIC CLUSTERS; OPTIMIZATION; ALGORITHM; GEOMETRY SO - Parallel Computing 2003 ;29(4):523-533 8153 UI - 9160 AU - Gomez S AD - Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan 82040, Sinaloa, MexicoLimburgs Univ Ctr, Dept SBG, Res Grp Zool, B-3610 Diepenbeek, BelgiumGomez, S, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Joel Montes Camarena S-N,Ap Postal 811, Mazatlan 82040, Sinaloa, Mexico TI - Three new species of Enhydrosoma and a new record of Enhydrosoma lacunae (Copepoda : Harpacticoida : Cletodidae) from the Eastern Tropical Pacific AB - A number of harpacticoid copepods were collected during two series of sampling campaigns in a coastal lagoon and in a brackish system in northern and southern Sinaloa (northwestern Mexico), respectively. Four enhydrosomid species were recognized. Three of them are new to science. Enhydrosoma lacunae is reported for the sixth time. This record extends the distribution of the species from the Caribbean Sea to the Eastern Tropical Pacific, and it is suggested that it is an invasive species home in water ballast of ships. Enhydrosoma parapropinquum sp. nov. bears a strong resemblance to E. propinquum, but these species are different in shape of the caudal rami and female fifth leg. Enhydrosoma casoae sp. nov. and E. solitarium sp. Boy. showed to be closely related to E. vicinum. These three species seem to be related by the structure and armature formula of the female fifth swimming leg. Enhydrosoma casoae sp. nov. and Enhydrosoma solitarium sp. nov. can be separated from each other by the ventral spinular ornamentation of urosome and spinular ornamentation of female P5 baseoendopod MH - Belgium MH - Mexico|Sinaloa PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000181048600010 L2 - GULF-OF-MEXICO; BIOMASS SO - Journal of Crustacean Biology 2003 ;23(1):94-118 8154 UI - 6655 AU - Gomez Y AU - Miranda LF AU - Anglada G AU - Torrelles JM AD - Natl Autonomous Univ Mexico, Astron Inst, Morelia 58089, Michoacan, Mexico. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USA. CSIC, Inst Ciencias Espacio, E-08034 Barcelona, Spain. CSIC, IEEC, E-08034 Barcelona, Spain TI - Water and OH maser emission from the planetary nebula k3-35 AB - Water-vapour masers, typical of the envelopes in giant stars, are not expected to persist in planetary nebulae due to the ultraviolet radiation of the remnant star that progressively destroys the molecules. Recently, we have reported the first unambiguous detection of water maser emission in a planetary nebula, K 3-35 (Miranda et al. 2001). The water masers in K3-35 were detected at the center of the nebula, along the minor axis, at a radius of similar to85 AU and also at the surprisingly large distance of 5000 AU from the star, at the tips of the bipolar lobes. The existence of these water molecules is puzzling, and probably we are observing the very moment of transformation of a giant star into a planetary nebula. Miranda et al. (2001) also report the presence of polarization in the OH 1665 MHz masers, which are distributed towards the central star in a torus-like structure. Here we review the main results on this source MH - Mexico|Michoacan MH - Spain MH - USA T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400075 SO - 2003 ;(209):263-266 8155 UI - 7192 AU - Gomez Y AU - Rodriguez LF AU - Girart JM AU - Garay G AU - Marti J AD - UNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Catalunya, SpainUniv Chile, Dept Astron, Santiago, ChileUniv Jaen, Escuela Politecn Super, Dept Fis, E-23071 Jaen, SpainGomez, Y, UNAM, Ctr Radioastron & Astrofis, Apartado Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico TI - VLA and BIMA observations toward the exciting source of the massive HH 80-81 outflow AB - We present high angular resolution Very Large Array (VLA) and Berkeley-Illinois-Maryland Association (BIMA) observations of NH3, HCO+, HCN, and SO molecular emission and 1.4, 3.5, and 7 mm continuum emission toward the exciting source of the HH 80-81 system. This object is one of the few massive protostars known to be driving a collimated outflow. We report the first detection of SO 5(5)-4(4) molecular emission toward the exciting source of HH 80-81, suggesting that this transition may be a good tracer of molecular gas near massive protostars. We also detected toward this source dust continuum emission at 1.4 and 3.5 mm. From the SO molecular emission and the dust emission we roughly estimated that the molecular mass associated with the circumstellar surroundings of the exciting source of the thermal jet is in the range 1-3 M.. Weak and broad (2, 2) ammonia emission was also found in the direction of the jet, suggesting the presence of small amounts of molecular gas at high temperatures (> 50 K). The VLA observations show the presence of three ammonia components toward the HH 80-81 region. The brightest component peaks at similar to8" northeast of the thermal jet and is associated with the H2O maser spots in the region. A second ammonia clump is located about 25" northeast of the jet and is associated with Class I methanol masers. The third ammonia component is located 10 south of the thermal jet and may be a molecular core, yet without stellar formation. The BIMA observations show that the strongest emission in the HCO+ and HCN lines originates close to the H2O maser and covers the same spatial region and velocity range as the brightest ammonia component MH - Chile MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186170800036 L2 - astrochemistry;ISM : Herbig-Haro objects;ISM : individual (HH 80-81, GGD27, IRAS 18162-2048);ISM : jets and outflows;ISM : molecules;radio lines : ISM;HERBIG-HARO OBJECTS; THERMAL RADIO JET; CEPHEUS-A HW2; YOUNG STAR; MOLECULAR CONDENSATIONS; CIRCUMSTELLAR DISKS; CONTINUUM EMISSION; PROPER MOTIONS; H2O MASERS; GGD 27-IRS SO - Astrophysical Journal 2003 ;597(1):414-423 8156 UI - 8367 AU - Gonzalez-Aguilar GA AU - Buta JG AU - Wang CY AD - USDA ARS, Prod Qual & Safety Lab, Beltsville, MD 20705, USACtr Invest Alimentac & Desarrollo, AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoGonzalez-Aguilar, GA, USDA ARS, Prod Qual & Safety Lab, 10300 Baltimore Ave, Beltsville, MD 20705 USA TI - Methyl jasmonate and modified atmosphere packaging (MAP) reduce decay and maintain postharvest quality of papaya 'Sunrise' AB - Exposure of papaya (Carica papaya L., cv. Sunrise) fruit to methyl jasmonate (MJ) vapors (10(-5) or 10(-4) M) for 16 h at 20degreesC inhibited fungal decay and reduced chilling injury development and loss of firmness during storage for 14-32 days at 10degreesC and 4 days shelf life at 20degreesC. MJ-treated fruit also retained higher organic acids than the control fruit. Low density polyethylene film packaging prevented water loss and further loss of firmness as well as inhibiting yellowing (b* values) of papaya fruit. The modified atmosphere created (3-5 kPa O-2 and 6-9 kPa CO2) inside the package did not induce any off-flavor development during storage at 10degreesC. The postharvest quality of papaya was enhanced significantly by combining the MJ-treatments and MAP. Use of MJ at 10(-5) M with MAP is beneficial to maintaining postharvest quality of papaya during low temperature storage and shelf-life period. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000183044600003 L2 - papaya;methyl jasmonate;film packaging;fungal decay;Anthracnose;chilling injury;CHILLING INJURY; FRUIT; GRAPEFRUIT SO - Postharvest Biology and Technology 2003 ;28(3):361-370 8157 UI - 7590 AU - Gonzalez-Barranco J AU - Rios-Torres JM AU - Castillo-Martinez L AU - Lopez-Alvarenga JC AU - guilar-Salinas CA AU - Bouchard C AU - Depres JP AU - Tremblay A AD - Inst Nacl Ciencias Med & Nutr SZ, Dept Endocrinol & Metab, Secc 16, Mexico City 14000, DF, MexicoPennington Biomed Res Ctr, Baton Rouge, LA, USAUniv Laval, Dept Food Sci & Nutr, St Foy, PQ G1K 7P4, CanadaUniv Laval, Div Kinesiol, St Foy, PQ G1K 7P4, CanadaGonzalez-Barranco, J, Inst Nacl Ciencias Med & Nutr SZ, Dept Endocrinol & Metab, Secc 16, Vasco Quirogo 15, Mexico City 14000, DF, Mexico TI - Effect of malnutrition during the first year of life on adult plasma insulin and glucose tolerance AB - There is evidence linking intrauterine growth retardation with increased cardiovascular risk and diabetes mellitus (DM) later in life. However, little is known about the association between malnutrition during the first year of life and metabolic abnormalities in adulthood. The objective of this study was to assess the effect of documented malnutrition during the first year of life on glucose tolerance, plasma insulin, lipid profile, and blood pressure in early adulthood, as well as to assess the interaction between body mass index (BMI) and malnutrition on these variables. A study group of young men with a documented history of malnutrition during their first year of life was recruited from 4 pediatric hospitals in Mexico City and compared with a control group. Subjects included were 52 men, aged 20.2 +/- 3.6 years, with a mean birth weight of 3.0 +/- 0.7 kg and documented malnutrition in their first year of life; controls were 50 men, aged 23.3 +/- 1.8 years, with a mean birth weight of 3.2 +/- 0.5 kg. Insulin and glucose concentrations, fasting and in response to an oral glucose load, plasma lipids, blood pressure, and an insulin sensitivity index (ISI) were measured. The areas under the curves of glucose (AUCG) and insulin (AUCI) were significantly higher in cases ( P = .012 and < .002, respectively), independent of birth weight, BMI, or age. BMI was significantly associated with fasting plasma insulin (FPI), AUCI, ISI, triglyceride, and high-density lipoprotein (HDL)cholesterol concentrations in cases, but not in controls. These data suggest that early malnutrition in extrauterine life, independently of birth weight, has an adverse effect on insulin metabolism and glucose tolerance in young men, and it worsens as body mass increases even within the normal range of BMI. Therefore, it is advisable to prevent obesity in individuals exposed to early malnutrition. (C) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 7 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0026-0495 UR - ISI:000185015300010 L2 - CORONARY-HEART-DISEASE; INTRAUTERINE GROWTH-RETARDATION; DEPENDENT DIABETES-MELLITUS; BLOOD-PRESSURE; BIRTH-WEIGHT; THRIFTY PHENOTYPE; FETAL GROWTH; RESISTANCE; HYPERTENSION; ADOLESCENCE SO - Metabolism-Clinical and Experimental 2003 ;52(8):1005-1011 8158 UI - 8903 AU - Gonzalez-Barrios JM AU - Quiroz AJ AD - UNAM, Dept Probabilidad & Estadist, Inst Invest Matemat Aplicadas & Sistemas, Mexico City, DF, MexicoUniv Simon Bolivar, CESMA, Caracas 89000, VenezuelaUniv Simon Bolivar, Dept Computo Cientif & Estadist, Caracas 89000, Venezuela TI - A clustering procedure based on the comparison between the k nearest neighbors graph and the mininial spanning tree AB - We present a procedure for the identification of clusters in multivariate data sets, based on the comparison between the k nearest neighbors graph, G(k), and the minimal spanning tree, MST. Our key statistic is the random quantity (k) over tilde := the smallest k such that G(k) Contains the MST. Under regularity assumptions, we show that for i.i.d. data from a density on R-d with compact support having one connected component, (k) over tilde = O-Pr(log n), where n denotes sample size, a bound that seems to be sharp, according to simulations. This leads to a consistent test for the identification of crisp clusters. We illustrate the use of our procedure with an example. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0167-7152 UR - ISI:000181571900003 L2 - nearest neighbors graph;minimal spanning tree;clustering;MULTIVARIATE SO - Statistics & Probability Letters 2003 ;62(1):23-34 8159 UI - 6974 AU - Gonzalez-del Angels A AU - Spector E AU - Alcantara MA AU - del Castillo V AD - Inst Politecn Nacl, Dept Invest Genet Humana, Mexico City, DF, MexicoUniv Colorado, Ctr Hlth Sci, Dept Pediat, Boulder, CO 80309, USA TI - Achondroplasia-hypocondroplasia complex in a Mexican patient MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599700540 SO - American Journal of Human Genetics 2003 ;73(5):262-262 8160 UI - 8458 AU - Gonzalez-Esparza JA AU - Lara A AU - Perez-Tijerina E AU - Santillan A AU - Gopalswamy N AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Computo Aplicado DGSCA, Mexico City 04510, DF, MexicoNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USACatholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20064, USAGonzalez-Esparza, JA, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A numerical study on the acceleration and transit time of coronal mass ejections in the interplanetary medium AB - [1] Recently, an empirical model of the acceleration/deceleration of coronal mass ejections (CMEs) as they propagate through the solar wind was developed using near-Sun (coronagraphic) and near-Earth ( in situ) observations [Gopalswamy et al., 2000, 2001a]. This model states and quantifies the fact that slow CMEs are accelerated and fast CMEs are decelerated toward the ambient solar wind speed (similar to400 km/s). In this work we study the propagation of CMEs from near the Sun (0.083 AU) to 1 AU using numerical simulations and compare the results with those of the empirical model. This is a parametric study of CME-like disturbances in the solar wind using a one-dimensional, hydrodynamic single-fluid model. Simulated CMEs are propagated through a variable ambient solar wind and their 1 AU characteristics are derived to compare with observations and the empirical CME arrival model. We were able to reproduce the general characteristics of the prediction model and to obtain reasonable agreement with two-point measurements from spacecraft. Our results also show that the dynamical evolution of fast CMEs has three phases: ( 1) an abrupt and strong deceleration just after their injection against the ambient wind, which ceases before 0.1 AU, followed by ( 2) a constant speed propagation until about 0.45 AU, and, finally, ( 3) a gradual and small deceleration that continues beyond 1 AU. The results show that it is somewhat difficult to predict the arrival time of slow CMEs ( V-cme < 400 km/s) probably because the travel time depends not only on the CME initial speed but also on the characteristics of the ambient solar wind and CMEs. However, the simulations show that the arrival time of very fast CMEs (V-cme > 1000 km/s) has a smaller dispersion so the prediction can be more accurate MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000182907900001 L2 - ejecta;CMEs;interplanetary;numerical simulations;SOLAR-WIND SO - Journal of Geophysical Research-Space Physics 2003 ;108(A1): 8161 UI - 8251 AU - Gonzalez-Espinosa C AU - Odom S AU - Olivera A AU - Hobson JP AU - Martinez MEC AU - Oliveira-dos-Santos A AU - Barra L AU - Spiegel S AU - Penninger JM AU - Rivera J AD - NIAMSD, Mol Inflammat Sect, Mol Immunol & Inflammat Branch, NIH, Bethesda, MD 20892, USACINVESTAV, Dept Pharmacol, Mexico City 14330, DF, MexicoVirginia Commonwealth Univ, Dept Biochem, Richmond, VA 23298, USAAustrian Acad Sci, Inst Mol Biotechnol, A-1030 Vienna, AustriaUniv Hlth Network, Ontario Canc Inst, Toronto, ON M5G 2C1, CanadaUniv Toronto, Dept Med Biophys, Toronto, ON M5G 2C1, CanadaUniv Toronto, Dept Immunol, Toronto, ON M5G 2C1, CanadaRivera, J, NIAMS, NIH, Bldg 10,Room 9N228, Bethesda, MD 20892, USA TI - Preferential signaling and induction of allergy-promoting lymphokines upon weak stimulation of the high affinity IgE receptor on mast cells AB - Mast cell degranulation and de novo cytokine production is a consequence of antigen-aggregation of the immunoglobulin E (IgE)-occupied high affinity receptor for IgE (FcepsilonPI). Herein, we report that lymphokines that promote allergic inflammation, like MCP-1, were potently induced at low antigen (Ag) concentrations or at low receptor occupancy with IgE whereas some that down-regulate this response, like interleukin (IL)-10, required high receptor occupancy. Weak stimulation of mast cells caused minimal degranulation whereas a half-maximal secretory response was observed for chemokines and, with the exception of TNF-alpha, a weaker cytokine secretory response was observed. The medium from weakly stimulated mast cells elicited a monocyte/macrophage chemotactic response similar to that observed at high receptor occupancy. Weak stimulation also favored the phosphorylation of Gab2 and p38MAPK, while LAT and ERK2 phosphorylation was induced by a stronger stimulus. Gab2-deficient mast cells were severely impaired in chemokine mRNA induction whereas LAT-deficient mast cells showed a more pronounced defect in cytokines. These findings demonstrate that perturbation of small numbers of IgE receptors on mast cells favors certain signals that contribute to a lymphokine response that can mediate allergic inflammation MH - Austria MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 52 U4 - Immunology;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0022-1007 UR - ISI:000183376300006 L2 - cytokines;Gab2;IgE;LAT;mast cells;FC-EPSILON-RI; ACTIVATED PROTEIN-KINASE; GENE-EXPRESSION; CALCIUM MOBILIZATION; CO-STIMULATION; GROWTH-FACTOR; MAP KINASES; IFN-GAMMA; T-CELLS; LIGAND SO - Journal of Experimental Medicine 2003 ;197(11):1453-1465 8162 UI - 8262 AU - Gonzalez-Espinosa C AU - Odom S AU - Olivera A AU - Hobson JP AU - Martinez MEC AU - Oliveira-dos-Santos A AU - Barra L AU - Spiegel S AU - Penninger J AU - Rivera J AD - CINVESTAV Zona Sur, Mexico City 14330, DF, MexicoNIAMS, Bethesda, MD, USAVCU, Richmond, VA, USAIMB, Vienna, Austria TI - Weak stimulation of the high affinity IgE receptor on mast cells causes preferential signaling and induction of selected lymphokines MH - Austria MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000182367000051 SO - Faseb Journal 2003 ;17(7):C11-C11 8163 UI - 8947 AU - Gonzalez-Felix ML AU - Lawrence AL AU - Gatlin DM AU - Perez-Velazquez M AD - Texas A&M Univ, TAES Shrimp Mariculture Project, Port Aransas, TX, USATexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAGonzalez-Felix, ML, Univ Sonora, Dept Invest Cient & Tecnol, Rosales & Ninos Heroes S-N,AP 1819, Hermosillo 83000, Sonora, Mexico TI - Nutritional evaluation of fatty acids for the open thelycum shrimp, Litopenaeus vannamei: I. Effect of dietary linoleic and linolenic acids at different concentrations and ratios on juvenile shrimp growth, survival and fatty acid composition AB - A 6-week feeding trial was conducted to evaluate the nutritional value of dietary linoleic (18:2n-6, LOA) and linolenic (18:3n-3, LNA) acids for juvenile Litopenaeus vannamei by determining their effects on growth, survival and fatty acid composition of hepatopancreas and muscle tissue. Diets were formulated to contain 5% total lipid. A basal diet contained only palmitic and stearic acids, each at 2.5% of diet. Six diets contained one of three levels (0.25, 0.5 and 1%) of either LOA or LNA, and three diets had different ratios of LNA/LOA (1, 3, 9) at a combined inclusion level of 0.5% of diet. An additional diet contained 0.5% of a mixture of n-3 highly unsaturated fatty acids (HUFA). The fatty acid profile of hepatopancreas and muscle of shrimp reflected the profile of the diets. HUFA of the n-3 family showed higher nutritional value than LOA or LNA for juvenile L. vannamei by producing significantly (P < 0.05) higher final weight and weight gain. Neither LOA nor LNA, alone or in combination, improved growth significantly compared with shrimp fed the basal diet.Thus, dietary requirements for LOA and LNA were not demonstrated under these experimental conditions MH - Mexico|Sonora MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Fisheries U5 - J;Article AV - English IS - 1353-5773 UR - ISI:000181634300005 L2 - fatty acids;lipids;Litopenaeus vannamei;shrimp nutrition;PENAEUS-MONODON; SCIAENOPS-OCELLATUS; CHINESE PRAWN; RED DRUM; REQUIREMENTS; PROTEIN; CHINENSIS; INDICUS; LEVEL; OILS SO - Aquaculture Nutrition 2003 ;9(2):105-113 8164 UI - 8948 AU - Gonzalez-Felix ML AU - Gatlin DM AU - Lawrence AL AU - Perez-Velazquez M AD - Texas A&M Univ, TAES Shrimp Mariculture Project, Port Aransas, TX, USATexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAGonzalez-Felix, ML, Univ Sonora, Dept Invest Cient & Tecnol, Rosales & Ninos Heroes S-N,AP 1819, Hermosillo 83000, Sonora, Mexico TI - Nutritional evaluation of fatty acids for the open thelycum shrimp, Litopenaeus vannamei: II. Effect of dietary n-3 and n-6 polyunsaturated and highly unsaturated fatty acids on juvenile shrimp growth, survival, and fatty acid composition AB - This study evaluated the nutritional value of dietary n-3 and n-6 polyunsaturated fatty acids (PUFA) such as linoleic (LOA) and linolenic (LNA) acids, and highly unsaturated fatty acids (HUFA) such as arachidonic (AA), eicosapentaenoic (EPA), and docosahexaenoic (DHA) acids for juvenile Litopenaeus vannamei , based on their effects on growth, survival, and fatty acid composition of hepatopancreas and muscle tissue. Diets contained 5% total lipid. A basal diet contained palmitic and stearic acids each at 2.5% of diet. Five diets contained 0.5% dry weight of LOA, LNA, AA, EPA, or DHA. An additional diet evaluated HUFA in combination by supplementing at 0.5% of diet, a mixture of n-3 HUFA. All HUFA showed higher nutritional value than PUFA for shrimp and produced significantly (P < 0.05) higher final weight, weight gain, and total lipid in shrimp muscle. Fatty acid profiles of shrimp tissues reflected the composition of the dietary lipids. In general, saturated fatty acids were more abundant in the neutral factions, while PUFA and HUFA were more abundant in the polar fractions of tissues. Under these experimental conditions, HUFA had much greater nutritional value than PUFA for juvenile L. vannamei ; moreover, dietary requirements for PUFA were not demonstrated MH - Mexico|Sonora MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Fisheries U5 - J;Article AV - English IS - 1353-5773 UR - ISI:000181634300006 L2 - fatty acids;lipids;Litopenaeus vannamei;shrimp nutrition;PENAEUS-MONODON; CHINESE PRAWN; REQUIREMENTS; METABOLISM; CHINENSIS SO - Aquaculture Nutrition 2003 ;9(2):115-122 8165 UI - 7381 AU - Gonzalez-Galvan EJ AU - Cruz-Ramirez SR AU - Seelinger MJ AU - Cervantes-Sanchez JJ AD - Univ Autonoma San Luis Potosi, Fac Ingn, Ctr Invest & Estudios Posgrado, San Luis Potosi 78290, SLP, MexicoYoder Software Inc, Urbana, IL 61801, USAUniv Guanajuato, Fac Ingn Mecan Elect & Elect, Salamanca 36730, Gto, MexicoGonzalez-Galvan, EJ, Univ Autonoma San Luis Potosi, Fac Ingn, Ctr Invest & Estudios Posgrado, Av Dr Manuel Nava 8,Zona Univ, San Luis Potosi 78290, SLP, Mexico TI - An efficient multi-camera, multi-target scheme for the three-dimensional control of robots using uncalibrated vision AB - A vision-based control methodology is presented in this paper that can perform accurate, three-dimensional (3D), positioning and path-tracking tasks. Tested with the challenging manufacturing task of welding in an unstructured environment, the proposed methodology has proven to be highly reliable, consistently achieving terminal precision of 1 mm. A key limiting factor for this high precision is camera-space resolution per unit physical space. This paper also presents a means of preserving and even increasing this ratio over a large region of the robot's workspace by using data from multiple vision sensors. In the experiments reported in this paper, a laser is used to facilitate the image processing aspect of the vision-based control strategy. The laser projects "laser spots" over the workpiece in order to gather information about the workpiece geometry. Previous applications of the control method were limited to considering only local, geometric information of the workpiece, close to the region where the robot's tool is going to be placed. This paper presents a methodology to consider all available information about the geometry of the workpiece. This data is represented in a compact matrix format that is used within the algorithm to evaluate an optimal robot configuration. The proposed strategy processes and stores the information that comes from various vision sensors in an efficient manner. An important goal of the proposed methodology is to facilitate the use of industrial robots in unstructured environments. A graphical-user-interface (GUI) has been developed that simplifies the use of the robot/vision system. With this GUI, complex tasks such as welding can be successfully performed by users with limited experience in the control of robots and welding techniques. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - Mexico|San Luis Potosi MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Interdisciplinary Applications;Engineering, Manufacturing;Robotics U5 - J;Article AV - English IS - 0736-5845 UR - ISI:000185422300001 L2 - multi-camera;multi-target;vision;control;robotics;user-interface;SPACE MANIPULATION; MOMENTS SO - Robotics and Computer-Integrated Manufacturing 2003 ;19(5):387-400 8166 UI - 7502 AU - Gonzalez-Garcia JJ AU - Prawirodirdjo L AU - Bock Y AU - Agnew D AD - Ctr Invest Clentif & Educ Super, Ensenada, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Cecil H & Ida M Inst Geophys & Planetary Phys, La Jolla, CA 92093, USAGonzalez-Garcia, JJ, Ctr Invest Clentif & Educ Super, Ensenada, Baja California, Mexico TI - Guadalupe Island, Mexico as a new constraint for Pacific plate motion AB - [1] We use GPS data collected on Isla de Guadalupe and in northern Baja California, Mexico, to estimate site velocities relative to Pacific plate motion. The velocities of all three geodetic monuments on Guadalupe fit a rigid Pacific plate model with residuals of 1 mm/yr. Using the Guadalupe data and data from five IGS stations on the Pacific plate ( CHAT, KOKB, KWJ1, MKEA, and THTI) we estimate an angular velocity for this plate that is consistent with other recently-published estimates. Our results indicate that Isla de Guadalupe lies on the Pacific plate, and that GPS data collection on the island usefully constrains Pacific plate motion and rigidity MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000185250700005 L2 - CONTINENTAL BORDERLAND; SOUTHERN CALIFORNIA; BAJA-CALIFORNIA; FAULT; BOUNDARY; RATES; ZONE SO - Geophysical Research Letters 2003 ;30(16): 8167 UI - 7375 AU - Gonzalez-Jasso E AU - Lopez T AU - Lucas D AU - Berthou F AU - Manno M AU - Ortega A AU - Albores A AD - IPN, CINVESTAV, Secc Toxicol, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Genet & Biol Mol, Mexico City 07360, DF, MexicoFac Med, Biochim Lab, Brest, FranceUniv Padua, Dipartimento Med Ambientale & Sanita Publ, Padua, ItalyAlbores, A, IPN, CINVESTAV, Secc Toxicol, Ave PIN 2508, Mexico City 07360, DF, Mexico TI - CYP2E1 regulation by benzene and other small organic chemicals in rat liver and peripheral lymphocytes AB - The inducibility of CYP2E1 was investigated in liver and peripheral lymphocytes of rats treated with benzene (0-10 mmol/kg body weight (bw), daily for 3 days, i.p., or 0 and 5 mmol/kg bw, daily for 14 days, i.p.) or toluene (0 and 5 mmol/kg bw, daily for 3 days, i.p.) and compared with that of pyridine (5 mmol/kg bw, i.p.) or acetone (5% in drinking water) both daily for 3 days. Acute benzene treatment (5 mmol/kg bw) increased both CYP2E1 apo-protein (2-fold) and p-nitrophenol hydroxylase (p-NPH) activity (1.4-fold) in liver, and CYP2E1 mRNA in both liver (2.2-fold) and peripheral lymphocytes (2.9-fold). The response to toluene was qualitatively similar, although smaller than that to benzene. As expected, acetone and pyridine treatments resulted in a 2- to 3-fold increase of p-NPH activity and CYP2E1 apo-protein content in liver, but not the mRNA levels. In addition, acute benzene and acetone treatments increased the 6-hydroxychlorzoxazone/chlorzoxazone metabolic ratio 1.6- and 3.1-fold, respectively. The subchronic treatment with benzene increased CYP2E1 mRNA and apo-protein from days 2 and 3 to day 14, respectively, whereas the enzyme activity increased transiently on days 3 and 5 only. These results show that acute/subacute benzene and acute toluene treatments induce CYP2E1 expression probably through a similar mechanism which might be different from that of pyridine or acetone, in that the former increase mRNA levels, both in liver and in peripheral lymphocytes, whereas the latter stabilized the apo-protein. (C) 2002 Elsevier Ireland Ltd. All rights reserved MH - France MH - Italy MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 4 U4 - Toxicology U5 - J;Article AV - English IS - 0378-4274 UR - ISI:000185531100007 L2 - benzene;CYP2E1;liver;lymphocytes;toluene;CYTOCHROME-P450 DESTRUCTION; BENZOPYRENE METABOLISM; GENE-EXPRESSION; MESSENGER-RNA; HUMAN BLOOD; MICROSOMES; INDUCTION; EXPOSURE; CHLORZOXAZONE; INHIBITION SO - Toxicology Letters 2003 ;144(1):55-67 8168 UI - 7634 AU - Gonzalez-Jose RG AU - Gonzalez-Martin AG AU - Hernandez M AU - Pucciarelli HM AU - Sardi M AU - Rosales A AU - Van der Molen S AD - Univ Barcelona, Fac Biol, Seccio Antropol, E-08028 Barcelona, SpainUniv Autonoma Estado Hidalgo, Area Acad Hist & Antropol, Pachuca 42000, MexicoNatl Univ La Plata, Fac Ciencias Nat & Museo, Museo La Plata, Dept Cient Antropol, RA-1900 La Plata, ArgentinaCtr INAH Baja California Sur, Inst Nacl Antropol & Hist, La Paz 23000, MexicoUniv Autonoma Barcelona, Fac Ciencies, BAVE, Unitat Zool, E-08193 Barcelona, SpainGonzalez-Jose, RG, Univ Barcelona, Fac Biol, Seccio Antropol, Diagonal 645, E-08028 Barcelona, Spain TI - Craniometric evidence for Palaeoamerican survival in Baja California AB - A current issue on the settlement of the Americas refers to the lack of morphological affinities between early Holocene human remains (Palaeoamericans) and modern Amerindian groups, as well as the degree of contribution of the former to the gene pool of the latter(1-6). A different origin for Palaeoamericans and Amerindians is invoked to explain such a phenomenon(3). Under this hypothesis, the origin of Palaeoamericans must be traced back to a common ancestor for Palaeoamericans and Australians, which departed from somewhere in southern Asia and arrived in the Australian continent and the Americas around 40,000 and 12,000 years before present, respectively. Most modern Amerindians are believed to be part of a second, morphologically differentiated migration(3). Here we present evidence of a modern Amerindian group from the Baja California Peninsula in Mexico, showing clearer affinities with Palaeoamerican remains than with modern Amerindians. Climatic changes during the Middle Holocene probably generated the conditions for isolation from the continent, restricting the gene flow of the original group with northern populations, which resulted in the temporal continuity of the Palaeoamerican morphological pattern to the present MH - Argentina MH - Mexico|Baja California Sur MH - Mexico|Hidalgo MH - Spain PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 17 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000185089200036 L2 - CONTINENTAL MORPHOLOGICAL AFFINITIES; GENE FLOW; AMERICANS; SHAPE SO - Nature 2003 ;425(6953):62-65 8169 UI - 8586 AU - Gonzalez-Mariscal G AU - Jimenez P AU - Beyer C AU - Rosenblatt JS AD - UAT, CINVESTAV, Ctr Invest Reprod Anim, Tlaxcala 90000, MexicoRutgers State Univ, Dept Psychol, Newark, NJ 07102, USAGonzalez-Mariscal, G, UAT, CINVESTAV, Ctr Invest Reprod Anim, Apdo Postal 62, Tlaxcala 90000, Mexico TI - Androgens stimulate specific aspects of maternal nest-building and reduce food intake in rabbits AB - Fluctuations in the plasma concentration of estradiol, progesterone, and prolactin across pregnancy regulate maternal nest-building (digging, straw-carrying, and hair-plucking) and food intake in rabbits. Because testosterone levels also change through pregnancy, we investigated if the injection of testosterone propionate (TP; 1 or 5 mg/day) or 5alpha-dihydrotestosterone propionate (5 or 10 mg/day) for 20 days, alone and combined with progesterone (P; 10 mg/day from days 2 to 15), modulated nest-building and food intake in ovariectomized rabbits. Only the combined injection of TP (5 mg/day) plus P stimulated digging and no treatment promoted straw-carrying or hair-plucking. Both androgens induced hair-loosening from the ventrum, an effect counteracted by P. High doses of TP and 5alpha-dihydrotestosterone propionate reduced food intake by 60-70% of baseline values; this effect was counteracted by P in TP-treated animals. These results support a participation of androgens in specific aspects of maternal nest-building and reveal a strong inhibitory effect on food intake. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Tlaxcala MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Behavioral Sciences;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0018-506X UR - ISI:000182658500005 L2 - maternal behavior;rabbits;nest-building;food intake;androgens;testosterone;progesterone;aromatization;5 alpha-dihydrotestosterone;hair;TESTOSTERONE-METABOLISM; PROGESTINS; PROGESTERONE; BEHAVIOR; HORMONES; BALDNESS SO - Hormones and Behavior 2003 ;43(2):312-317 8170 UI - 8766 AU - Gonzalez-Melchor M AU - Alejandre J AU - Bresme F AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, EnglandGonzalez-Melchor, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Surface tension of the restrictive primitive model for ionic liquids AB - Hybrid molecular dynamics and Monte Carlo simulations are performed to study the liquid-vapor interface of the restricted primitive model (RPM) of ionic fluids. We report for the first time simulation results of the surface tension associated to this interface. The RPM accurately predicts experimental surface tensions of ionic salts and good agreement with theoretical predictions that include the idea of ion association is found. The simulation results indicate that the structure of an ionic liquid-vapor interface is rather rough. This is reflected in the interfacial thickness, larger than that observed in simple fluids and water MH - United Kingdom MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000182032600037 L2 - CHARGED HARD-SPHERES; MOLECULAR-DYNAMICS SIMULATIONS; LENNARD-JONES FLUID; VAPOR INTERFACE; MONTE-CARLO; MOLTEN-SALT; CRITICAL-POINT; BEHAVIOR; PHASE SO - Physical Review Letters 2003 ;90(13): 8171 UI - 9161 AU - Gonzalez-Mozuelos P AU - de la Cruz MO AD - Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208, USAIPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoGonzalez-Mozuelos, P, Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA TI - Association in electrolyte solutions: Rodlike polyelectrolytes in multivalent salts AB - We describe a new approach to determine the degree of association between ionic components in complex electrolyte solutions. We use the electrostatic contribution to the free energy that arises from the exact separation into long and short ranged parts of the correlation functions in a dilute electrolyte solution to determine the effective charge of the various ionic components. We describe the short-ranged direct correlations between different ionic components with delta functions whose strength give the direct association between them. The association is determined self-consistently by minimizing the resulting free energy, which contains long and short range correlations contributions. Association between like charges is mediated by direct association between opposite charges. We analyze rodlike polyelectrolyes in monovalent and/or multivalent salts. We find a broad minimum in the absolute value of effective rod charge at long distances as a function of monovalent salt concentration. This minimum is due to the association of the salt ions among themselves. We also determine the number of multivalent and monovalent ions associated to the rods. The degree of association is a function of the smallest length scale, which determines the electrostatic potential between ionic species at contact. (C) 2003 American Institute of Physics MH - USA MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 13 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000181065800039 L2 - DRESSED-ION THEORY; RESTRICTED PRIMITIVE MODEL; MONTE-CARLO SIMULATIONS; FLEXIBLE LINEAR POLYELECTROLYTES; MEAN SPHERICAL APPROXIMATION; CHARGED COLLOIDAL PARTICLES; ASYMMETRIC ELECTROLYTES; RIGID POLYELECTROLYTES; DNA; CONDENSATION SO - Journal of Chemical Physics 2003 ;118(10):4684-4691 8172 UI - 8783 AU - Gonzalez-Palacios MA AU - Angeles J AD - Integrac Proc Ind, Leon 37000, Gto, MexicoMcGill Univ, Dept Mech Engn, Montreal, PQ H3A 2K6, CanadaMcGill Univ, Ctr Intelligent Machines, Montreal, PQ H3A 2K6, CanadaGonzalez-Palacios, MA, Integrac Proc Ind, Leon 37000, Gto, Mexico TI - The design of a novel pure-rolling transmission to convert rotational into translational motion MH - Canada MH - Mexico|Guanajuato PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 1050-0472 UR - ISI:000182020100026 SO - Journal of Mechanical Design 2003 ;125(1):205-207 8173 UI - 6892 AU - Gonzalez-Partida E AU - Carrillo-Chavez A AU - Grimmer JOW AU - Pironon J AU - Mutterer J AU - Levresse G AD - UNAM, Ctr Geociencias, Unidad Invest Ciencias Tierra, Inst Geol, Juriquilla 76230, Queretaro, MexicoCREGU, F-54501 Vandoeuvre Les Nancy, FranceIBMP, F-67084 Strasbourg, FranceGonzalez-Partida, E, UNAM, Ctr Geociencias, Unidad Invest Ciencias Tierra, Inst Geol, Campus Juriquilla AP 15, Juriquilla 76230, Queretaro, Mexico TI - Fluorite deposits at Encantada-Buenavista, Mexico: products of Mississippi Valley type processes AB - Petroleum and aqueous fluid inclusions from the Encantada-Buenavista fluorite mineralized zone in northern Mexico were analyzed by microthermometry, UV fluorescence, Raman Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR) and Confocal Scanning Laser Microscopy (CSLM) to evaluate the geochemical evolution of the mineralizing fluids. Two-phase (petroleum or brine + vapor) and three-phase (petroleum + brine + vapor) inclusions are described. Aqueous and petroleum-rich inclusions commonly occur in the same plane. Vapor-decrepitated and stretched fluid inclusions are present. A low-salinity methane-saturated fluid and a high salinity-fluid with highly variable methane contents are recognized. H2S is not quantified but is always detected in close association with methane. Petroleum inclusions are of two types: a low methane petroleum fluid (20 mol%) with low T-h (60degreesC) and a petroleum fluid with a methane of content near 30 mol% and a T-h of 90degreesC. Pressure and temperature diagrams for the aqueous and petroleum inclusions show three main intersects that allow P-T-X reconstruction of fluid evolution at La Encantada-Buenavista. A CH4- and H2S-rich low-salinity brine was mixed with oil that migrated under hydrostatic conditions with a thermal gradient of 70degreesC/km. The arrival and mixing of a high-salinity aqueous fluid produced overpressure to 300 bars. A return to hydrostatic conditions was accompanied by an increase in the thermal gradient. The brine related to the fluorite orebodies appears to have a genetic relationship with the brines reported from the Jurassic petroleum basins located west of the fluorite bodies and similarities with reported fluids from Mississippi Valley type deposits. It is interpreted that the fluorine-rich fluids migrated toward the platform margins during the mid-Tertiary (30 to 32 Ma) using extension zones related to Basin and Range tectonism. Mixing of two different brines was responsible for precipitation and mineralization. Heat from magmas, related to tectonic extension, caused decrepitation and changes in the shape of fluid inclusions near the contact zones. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geology;Mining & Mineral Processing U5 - J;Review AV - English IS - 0169-1368 UR - ISI:000186690500003 L2 - brine;petroleum inclusions;Mississippi Valley type deposits;fluorite;thermodynamic modeling;HYDROCARBON FLUID INCLUSIONS; RAMAN-SPECTROSCOPY; DISTRICT; MINERALIZATION; GEOCHEMISTRY; EVOLUTION; SYSTEMS; ORIGIN; WATER; BASIN SO - Ore Geology Reviews 2003 ;23(3-4):107-124 8174 UI - 7817 AU - Gonzalez-Partida E AU - Levresse G AU - Carrillo-Chavez A AU - Cheilletz A AU - Gasquet D AU - Jones D AD - UNAM, Invest Ciencias Terra, Inst Geol, Ctr Geociencias, Queretaro 76230, Qro, MexicoCtr Rech Petrog & Geochim, CNRS, F-54501 Vandoeuvre Les Nancy, FranceCarrillo-Chavez, A, UNAM, Invest Ciencias Terra, Inst Geol, Ctr Geociencias, Campus Juriquilla,AP 1-752, Queretaro 76230, Qro, Mexico TI - Paleocene adakite Au-Fe bearing rocks, Mezcala, Mexico: evidence from geochemical characteristics AB - The Au-Fe mineralized granitoids at Mezcala district have a porphyry texture with a quartz+feldspar microcrystalline matrix and phenocrysts of plagioclase, quartz (with reaction rims), hornblende and biotite. The primary minerals are oligoclase-andesine, microcline and beta-quartz. The accessory minerals are biotite, hornblende and, in minor amounts, apatite+zircon+sphene+titanomagnetite. Some intrusive rocks present abundant hornblende autoliths. Based on the petrography and bulk geochemistry of these granitoids, they are classified as monzonite, tonalite (the most abundant) and granodiorite with a strong calc-alkaline trend in potassium (K2O=3.8% average). The bulk and trace elements chemistry is SiO2 = 63.8%, Al2O3 = 15.83%, Fe2O3 + MgO + MnO + TiO = 6.52%; V = 76.7 ppm, Cr = 50.2 ppm, Ni = 19.7 ppm, Sr = 694 ppm. These granitoids show a strong depletion in heavy rare-earth elements (HREE), with average values of Yb = 1 ppm and Y = 13 ppm, this being the characteristic geochemical signature for adakite. The trace elements content suggests that the adakite granitoids from Mezcala were formed within a tectonic framework of volcanic arc related to the interaction between the Farallon and North America plates. This interaction occurred during the Paleocene after the Laramide Orogeny (post-collision zone) in a fast convergent thick continental crust (>50 km) subduction regime. The original magma is interpreted as being the product of partial melting of an amphibolite-eclogite transition zone source with little contribution of the mantle wedge. Along with the hydration processes, a metallic fertility also took place in the area. The geochemical signature of the adakites within the granitoids rocks represents a characteristic guide for further exploration for Au-rich skarn-type ore deposits in southern Mexico. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000184518400003 L2 - adakite;Au skam;Paleocene;Mexico;SUBDUCTED LITHOSPHERE; MIOCENE ADAKITES; EPITHERMAL VEINS; VOLCANIC ZONE; PACIFIC-OCEAN; ARC MAGMAS; SLAB; CRUST; DEPOSITS; ORIGIN SO - Journal of Geochemical Exploration 2003 ;80(1):25-40 8175 UI - 8530 AU - Gonzalez-Partida E AU - Levresse G AU - Carrillo-Chavez A AU - Cheilletz A AU - Gasquet D AU - Solorio-Munguia J AD - UNAM, Ctr Geociencias, Queretaro 76230, Qro, MexicoCNRS, CRPG, F-54501 Vandoeuvre Les Nancy, FranceEcole Natl Super Geol, F-54501 Vandoeuvre Les Nancy, FranceGonzalez-Partida, E, UNAM, Ctr Geociencias, Campus Juriquilla AP 1-752, Queretaro 76230, Qro, Mexico TI - (An-Fe) Skarn deposits of the Mezcala district, south-central Mexico: Adakite association of the mineralizing fluids AB - Geochemical evidence is presented that the auro-ferriferous (Au-Fe) mineralized belt of south-central Mexico (Sierra Madre del Sur-Mezcala region) is directly linked to a regional post-Laramidic tectono-magmatic event, which was the product of interaction between the Farallon oceanic plate and the North America continental plate during the Middle to Late Tertiary. The Fe-rich skarn-type ore deposits are located near to the coast (80 to 100 km from the paleo-trench), whereas the Au-iron rich deposits of the Mezcala district are located 270 km from the paleo-trench where the crustal thickness is approximately 45 km. The magmatic record of the Tertiary rocks from the "Sierra Madre del Sur" extends from the Paleocene to Miocene, constituting an extended calc-alkaline magmatic province. Adakite-type intrusive rocks are reported in the area, and their relationship with the Au-Fe mineralization in Mezcala is well established. The geochemical anomalies of MgO, Cr, and Ni observed in the intrusive adakites are higher than the experimentally generated adakites; these geochemical features are interpreted to represent an adakite magma that reacted with a mantle wedge. The Sr/Y vs. Y plot shows a clear overlapping relationship between intrusions associated with Au and Cu ore deposits and adakites worldwide. The high La/Sm and Sm/Yb ratios are consistent with an amphibolite-garnet source for these Mezcala adakite rocks. The Au mineralization at Mezcala is spatially related to quartz porphyritic granodiorite (adakite) sills, and developed peripherally on adjacent wall rocks. Gold abundance in wall rock correlates very well with the composite thickness of the adjacent sills. The fluid inclusion analyses reveal that homogenization temperatures (Th) and exo-oxidizing high-salinity magmatic fluids are related to the gold- mineralizing event. The fluid inclusions in late magmatic quartz phenocrysts are multi-component (L + V + S-1.5). RAMAN microspeetrometric results indicate the presence of halite (S-1), sylvite (S-2), hematite (S-3), anhydrite (S-4), and an unidentified crystal (S-5). The late fluids have L + V and L-rich fluid inclusions. The earliest fluid identified has the higher salinity (63% total salinity, NaCl + KCl and Th between 480 and 675degreesC. This early fluid exhibits a large Th variation from 420degreesC (decompression-boiling) to final dilution processes at 100-127degreesC and salinities of 0.25 wt% NaCl equivalent. Most likely, this late fluid dilution is the product of mixing of nearly neutral meteoric water (pH = 7) with hot NaCl-rich fluids transporting gold in solution. The main mineralization in the area (hematite-gold) is the product of these late hydrothermal processes. The original magmatic fluids are dense and oxidizing, with boiling and late dilution linked to the retrograde evolution of the Au-Fe-rich skarn MH - France MH - Mexico|Queretaro PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 0 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000182761500006 L2 - PORPHYRY-COPPER-DEPOSIT; PAPUA-NEW-GUINEA; ARC-MAGMATISM; OCEANIC-CRUST; GOLD DEPOSITS; OXYGEN; CHILE; ENVIRONMENT; ZONATION; HYDROGEN SO - International Geology Review 2003 ;45(1):79-93 8176 UI - 8612 AU - Gonzalez-Ronquillo M AU - Balcells J AU - Guada JA AU - Vicente F AD - Univ Zaragoza, Dept Prod Anim & Ciencia Alimentos, E-50013 Zaragoza, SpainUniv Autonoma Estado Mexico, FMVZ, Dept Anim Prod, Toluca 50090, MexicoBalcells, J, Univ Zaragoza, Dept Prod Anim & Ciencia Alimentos, Miguel Servet 177, E-50013 Zaragoza, Spain TI - Purine derivative excretion in dairy cows: Endogenous excretion and the effect of exogenous nucleic acid supply AB - An experiment was conducted with dairy cows to study the partitioning of excreted purine derivatives between urine and milk and to quantify the endogenous contribution following the isotopic labeling of microbial purine bases. Three lactating cows in their second lactation that had been cannulated in the rumen and the duodenum were fed a mixed diet (48:52, roughage/concentrate ratio) distributed in equal fractions every 2 h, and duodenal flow of purine bases was determined by the dual-phase marker system. Nitrogen-15 was infused continuously into the rumen to label microbial purine bases, and the endogenous fraction was determined from the isotopic dilution in urinary purine derivatives. Urinary and milk recovery of duodenal purine bases were estimated at early (wk 10) and late ( wk 33) lactation by the duodenal infusion of incremental doses (75 and 150 mmol purine bases/d) of RNA from Torula yeast. Each period was 6 d, with RNA being infused during the last 4 d, followed by measurement of the flow of purine bases to the duodenum. The isotope dilution of purine derivatives in urine samples confirmed the presence of an endogenous fraction (512 +/- 36.43 mumol/ W-0.75 or 56.86 mmol/d) amounting to 26 +/- 3.8% of total renal excretion. Total excretion of purine derivatives in urine plus milk was linearly related to the duodenal input of purine bases, but the slopes differed (P < 0.005) between lactation stages resulting in a lower equimolar recovery in early (y = 58.86 (+/- 3.89) + 0.56(+/- 0.0164) x; r = 0.90) than late lactation (y = 58.86 (+/- 3.89) + 0.70 (+/- 0.046) x; r = 0.80). Excretion of purine derivatives through milk represented a minimum fraction of total excretion but responded significantly to the duodenal input of purine bases. No differences between lactation stages were detected, and variations in milk yield did modify significantly the amount of purine derivatives excreted through the milk MH - Mexico|Estado De Mexico MH - Spain PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 13 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000182512300025 L2 - dairy cow;purine derivative;microbial synthesis;urinary and milk excretion;MICROBIAL PROTEIN-SYNTHESIS; URINARY-EXCRETION; ALLANTOIN EXCRETION; RENAL EXCRETION; MILK ALLANTOIN; NITROGEN; SHEEP; RUMINANTS; INFUSION; ENERGY SO - Journal of Dairy Science 2003 ;86(4):1282-1291 8177 UI - 9174 AU - Gonzalez-Salazar D AU - Estrada-Franco JG AU - Carrara AS AU - Aronson JF AU - Weaver SC AD - Univ Texas, Dept Pathol, Med Branch, Galveston, TX 77555, USAInst Nacl Investigac Forestales Agricolas & Pecua, Mexico City, DF, MexicoWeaver, SC, Univ Texas, Dept Pathol, Med Branch, Galveston, TX 77555 USA TI - Equine amplification and virulence of subtype IE Venezuelan equine encephalitis viruses isolated during the 1993 and 1996 Mexican epizootics AB - To assess the role of horses as amplification hosts during the 1993 and 1996 Mexican Venezuelan equine encephalitis (VEE) epizootics, we subcutaneously infected 10 horses by using four different equine isolates. Most horses showed little or no disease and low or nonexistent viremia. Neurologic disease developed in only 1 horse, and brain histopathologic examination showed meningeal lymphocytic infiltration, perivascular cuffing, and focal encephalitis. Three animals showed mild meningoencephalitis without clinical disease. Viral RNA was detected in the brain of several animals 12-14 days after infection. These data suggest that the duration and scope of the recent Mexican epizootics were limited by lack of equine amplification characteristic of previous, more extensive VEE outbreaks. The Mexican epizootics may have resulted from the circulation of a more equine-neurdtropilc, subtype IE virus strain or from increased transmission to horses due to amplification by other vertebrate hosts or transmission by more competent mosquito vectors MH - Mexico|Distrito Federal MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000181034600003 L2 - ENCEPHALOMYELITIS VIRUS; NUCLEOTIDE-SEQUENCES; ALPHAVIRUSES; INFECTION; STRAINS; EASTERN; MICE SO - Emerging Infectious Diseases 2003 ;9(2):161-168 8178 UI - 9130 AU - Gonzalez-Trejo JI AU - Hernandez-Lerma O AU - Hoyos-Reyes LF AD - Univ Autonoma Metropolitana Azcapotzalco, Dept Sistemas, Mexico City 02200, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoCNRS, LAAS, F-31077 Toulouse, FranceGonzalez-Trejo, JI, Univ Autonoma Metropolitana Azcapotzalco, Dept Sistemas, Av San Pablo 180, Mexico City 02200, DF, Mexico TI - Minimax control of discrete-time stochastic systems AB - This paper gives a unified, self-contained presentation of minimax control problems for discrete-time stochastic systems on Borel spaces, with possibly unbounded costs. The main results include conditions for the existence of minimax strategies for finite-horizon problems and infinite-horizon discounted and undiscounted (average) cost criteria. The results are specialized to control systems with unknown disturbance distributions-also known as games against nature. Two examples illustrate the theory, one of them on the mold level control problem, which is a key problem in the steelmaking industry MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 0363-0129 UR - ISI:000180883600015 L2 - minimax control problems;Markov games with complete information;discrete-time stochastic control systems;games against nature;MOLD-LEVEL CONTROL; MARKOV GAMES; CONTINUOUS CASTER; FUZZY-LOGIC; AVERAGE; PAYOFF; MODELS; STRATEGIES; POLICIES SO - Siam Journal on Control and Optimization 2003 ;41(5):1626-1659 8179 UI - 8213 AU - Gonzalez-Villarreal LM AD - Univ Guadalajara, Inst Bot, Zapopan 45110, Jalisco, MexicoUniv Wisconsin, Dept Bot, Madison, WI 53706, USAGonzalez-Villarreal, LM, Univ Guadalajara, Inst Bot, Apartado Postal 139, Zapopan 45110, Jalisco, Mexico TI - Quercus tuitensis (Fagaceae, Quercus sect. Lobatae), a new deciduous oak from western Jalisco, Mexico AB - Quercus tuitensis, a deciduous red oak known only from the Sierra El Tuito on the Pacific slopes of western Jalisco, Mexico, is described, illustrated, and compared to Q. praineana Trel. In addition, Q. aequivenulosa and Q. coffaecolor are reaffirmed as synonyms of Q. praineana MH - Mexico|Jalisco MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-196X UR - ISI:000183578400007 L2 - Quercus;oak;Fagaceae;Mexico;endemic SO - Brittonia 2003 ;55(1):42-48 8180 UI - 8214 AU - Gonzalez-Villarreal LM AD - Univ Guadalajara, Inst Bot, Zapopan 45110, Jalisco, MexicoUniv Wisconsin, Dept Bot, Madison, WI 53706, USAGonzalez-Villarreal, LM, Univ Guadalajara, Inst Bot, Apartado Psotal 139, Zapopan 45110, Jalisco, Mexico TI - Two new species of oak (Fagaceae, Quercus sect. Lobatae) from the Sierra Madre del Sur, Mexico AB - Two new species of oak (Fagaceae) with narrowly elliptic-lanceolate leaves from the Sierra Madre del Sur of western Jalisco, Mexico, are described and illustrated. Quercus cualensis is a local endemic and Q. iltisii a more widespread species; they are closely related to Q. salicifolia Nee MH - Mexico|Jalisco MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-196X UR - ISI:000183578400008 L2 - Quercus;oaks;Fagaceae;Mexico;endemic SO - Brittonia 2003 ;55(1):49-60 8181 UI - 8416 AU - Gonzalez-Yebra B AU - Medrano ME AU - Mantilla A AU - Palma V AU - Colin C AU - Hernandez DM AU - Tapia J AU - Dawson B AU - Salcedo M AD - Univ Texas, SW Med Ctr, Dept Pathol, Mol Diagnost Lab, Dallas, TX, USAIPN, CINVESTAV, Dept Genet & Mol Biol, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Mol Biomed, Mexico City 07738, DF, MexicoNatl Med Ctr, SXXI IMSS, Clin Epidemiol Res Unit, Mexico City, DF, MexicoOncol Hosp, SXXI IMSS, Oncol Res Unit, Natl Med Ctr, Mexico City, DF, MexicoNatl Med Ctr, SXXI IMSS, Dept Pathol, Mexico City, DF, MexicoNatl Med Ctr, SXXI IMSS, Dept Endocrinol, Mexico City, DF, MexicoSalcedo, M, Hosp Oncol, Lab Oncol Genomica, Unidad Invest Med Enfermedades Oncol, CMN SXXI IMSS, Avenida Cuauhtemoc 330, Mexico City 07780, DF, Mexico TI - Penetrance of inherited medullary thyroid carcinoma and genotype-phenotype correlation in a large multiple endocrine neoplasia type 2A family with C634Y RET mutation AB - Multiple endocrine neoplasia type 2A (MEN 2A) and familial medullary thyroid carcinoma (FMTC) are characterized by development of medullary thyroid carcinoma (MTC) and caused by germline RET mutations. Patients with MEN 2A also develop pheochromocytoma and/or hyperparathyroidism (HPT). However, MEN 2A-affected individuals could display the FMTC phenotype at first clinical manifestation. To establish the correct phenotype and improve clinical management of patients affected by hereditary MTC, clinical screening, RET mutational analysis, penetrance of MTC, and genotype-phenotype correlation were performed in a large, suspected FMTC kindred of 86 individuals. Germline C634Y RET mutation was confirmed in 22 individuals, 15 of whom were thyroidectomized when high serum calcitonin levels were detected. MTC was confirmed in 12 individuals and C-cell hyperplasia in 3. HPT was detected in two patients. High penetrance of MTC at young age (79% at 30 yr of age) was found. This family was considered to be affected by FMTC for several years because MTC was the sole clinical manifestation. However, our results allowed reclassifying the family as MEN 2A, thereby improving clinical management of family members. Our findings regarding penetrance and genotype-phenotype correlation suggest that patients considered to have FMTC may in fact have MEN 2A in some kindreds MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism;Pathology U5 - J;Article AV - English IS - 1046-3976 UR - ISI:000183026300008 L2 - multiple endocrine neoplasia type 2A;medullary thyroid carcinoma;pheochromocytoma;RET mutation;MEN 2A; PROPHYLACTIC THYROIDECTOMY; DISEASE PHENOTYPE; PROTOONCOGENE; FMTC; MANAGEMENT; DIAGNOSIS; RISK; CONSORTIUM; GENETICS SO - Endocrine Pathology 2003 ;14(1):71-80 8182 UI - 8286 AU - Gonzalez CA AU - Villanueva C AU - Othman S AU - Narvaez R AU - Sacristan E AD - Univ Ejercito & Fuerza Aerea, Escuela Militar Graduados Sanidad & Escuela Milit, Mexico City 11320, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Lab Instrumentac Biomed, Mexico City 09340, DF, MexicoIPN, Escuela Super Med, Mexico City 11340, DF, MexicoMinist Hlth, Damascus, SyriaSacristan, E, Univ Ejercito & Fuerza Aerea, Escuela Militar Graduados Sanidad & Escuela Milit, Mexico City 11320, DF, Mexico TI - Impedance spectroscopy for monitoring ischemic injury in the intestinal mucosa AB - This work evaluates the feasibility of monitoring ischemic injury in the gastrointestinal mucosa by impedance spectroscopy, using a minimally invasive intestinal catheter. The disruption of the intestinal mucosa plays a key role in the evolution of shock and is the 'motor of multiple organ failure'. Different technologies have been developed to monitor mucosal perfusion, oxygenation and/or ischemia, but no practical method exists to assess tissue damage, which may be crucial for preventing multiple organ failure. The experimental protocol of this study relied on an isobaric model of hypovolemic shock in 16 anaesthetized rabbits assigned to three groups: sham (n = 6), ischernia (n = 5) and ischernia + reperfusion (n = 5). Complex impedance spectra were recorded in the range of 0.05 to 300 kHz, with simultaneous measurements of tonometric pHi in the ileum every 30 min for 4 h. Impedance spectra were reproducible, and those of tissue under prolonged ischernia were clearly differentiable from those of normally perfused tissue. The dynamic changes in impedance did not correlate directly with either tissue perfusion or pHi, but instead correlated well with the duration of ischernia. It is concluded that impedance spectroscopy does indeed measure changes in tissue injury, and could be a very useful tool to guide therapy of patients in shock MH - Mexico|Distrito Federal MH - Syria PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Biophysics;Engineering, Biomedical;Physiology U5 - J;Article AV - English IS - 0967-3334 UR - ISI:000183310100005 L2 - tonometry;intestinal ischemia;impedance spectroscopy;multiple organ failure;TISSUE; TRIAL SO - Physiological Measurement 2003 ;24(2):277-289 8183 UI - 7284 AU - Gonzalez CAL AU - Brown DE AU - Gallo-Reynoso JP AD - Denver Zool Fdn, Denver, CO 80205, USANo Rockies Conservat Cooperat, Denver, CO 80205, USAArizona State Univ, Dept Biol, Tempe, AZ 85287, USACtr Invest Alimentac & Desarrollo, Guaymas 85480, Sonora, MexicoGonzalez, CAL, Denver Zool Fdn, 2300 Steele St, Denver, CO 80205, USA TI - The ocelot Leopardus pardalis in north-western Mexico: ecology, distribution and conservation status AB - From July 1998 to July 2000 we collected locality information and habitat associations for 36 records of the Endangered ocelot Leopardus pardalis in the Mexican State of Sonora. Twenty-seven (75%) of the records for which we could determine the biotic community association were associated with tropical and subtropical habitats, namely subtropical thornscrub, tropical deciduous forest or tropical thornscrub. Only males (11.1% of the total records) have been recorded in temperate oak and pine-oak woodland, and we conclude that the few ocelots reported from these habitats in the US State of Arizona were probably dispersing individuals. Three models of ocelot distribution in Sonora, based on vegetation types, the GARP modelling system and the Adaptive Kernel home range estimator, all produced similar results, with the ocelot mostly associated with the mountainous Sierra region of eastern Sonora. Large tracts of land with a low human population density make Sonora a stronghold for the northernmost distribution of ocelots MH - Mexico|Sonora MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Ecology U5 - J;Article AV - English IS - 0030-6053 UR - ISI:000185681200019 L2 - Arizona;bobcat;habitat association;Leopardus pardalis;Lynx rufus;Mexico;ocelot;Sonora;RANGE SO - Oryx 2003 ;37(3):358-364 8184 UI - 6772 AU - Gonzalez E AU - Deriabina A AU - Teplukhin A AU - Hernandez A AU - Poltev VI AD - BUAP, CU, Fac Ciencias Fis Matemat, Puebla 72570, MexicoRussian Acad Sci, Inst Math Problems Biol, Pushchino 142290, Moscow Region, RussiaBUAP, CU, Fac Ciencias Quim, Puebla 72570, MexicoRussian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, RussiaGonzalez, E, BUAP, CU, Fac Ciencias Fis Matemat, Puebla 72570, Mexico TI - Monte Carlo study of three-dimensional organization of water molecules around DNA fragments AB - Interactions with water molecules are important for the stabilization of three-dimensional structures of nucleic acids and for their functioning. The first hydration shells of macromolecules can be considered as structural parts of nucleic acid. We performed a Monte Carlo study of systems containing a nucleic acid base or base pair with water molecules using improved potential functions. These potential functions enable experimental data on both single base-single water interaction energies and enthalpies of base hydration to be reproduced. Hydration shell structures of base pairs are dependent on the pair geometry. Structural elements of hydration shells can contribute to the pair stability and hence to the probability of mispair formation during nucleic acid biosynthesis. The distribution of water molecules around bases and base pairs is essentially nonhomogeneous MH - Mexico|Puebla MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1432-881X UR - ISI:000186958300016 L2 - DNA hydration;Monte Carlo;water bridges;molecular mechanics;energy calculations;NUCLEIC-ACID BASES; AQUEOUS-SOLUTIONS; B-DNA; A-DNA; HYDRATION; THERMOCHEMISTRY; ENTHALPIES; RESOLUTION; THYMINE; URACIL SO - Theoretical Chemistry Accounts 2003 ;110(6):460-465 8185 UI - 7681 AU - Gonzalez G AU - Aleman S AU - Infante D AD - Isnt Estudios Avanzados, Ctr Biotechnol, Caracas 10151 A, VenezuelaUniv Matanzas, Matanzas, CubaCtr Invest Cientif Yucatan, Merida, MexicoInfante, D, Isnt Estudios Avanzados, Ctr Biotechnol, Apdo 17606 Pk Cent, Caracas 10151 A, Venezuela TI - Asexual genetic variability in Agave fourcroydes II: selection among individuals in a clonally propagated population AB - Henequen is a perennial monocot that produces flowers only once towards the end of its long life cycle and then dies. Its high levels of ploidy (5x) render it sterile. It produces seeds with very low viability in the laboratory. Therefore, in plantations it is multiplied only through vegetative propagation using rhizomes. In previous work using AFLP, it was shown that despite its asexual reproduction henequen can be genetically variable. This variability is accompanied by differences in morphological characteristics. This fact indicates the possibility of selection among individuals in a clonally propagated population and its use for an improvement program via micropropagation through somatic embryogenesis. In this work, the study of morphological characters in selected individuals of henequen shows that differences exist in a clonally propagated population. Analysis with AFLP indicated that differences also exist at the genomic level. After micropropagation through somatic embryogenesis of three elite lines and 3 years under field conditions, we demonstrated using morphological analysis that plants originating from the same mother plant formed a group in Principal Component Analysis (PCA). AFLP and cluster analysis using Unweighted Pair-Group Method Arithmetic-Average (UPGMA) showed that each mother plant and its somatic embryogenesis derived daughter plants clustered, indicating the conservation of molecular marker patterns in the micropropagated daughter plants. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - Cuba MH - Mexico|Yucatan MH - Venezuela PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0168-9452 UR - ISI:000184742100017 L2 - AFLP;henequen;somatic embryogenesis;principal component analysis;ANGUSTIFOLIA AGAVACEAE; DIVERSITY; MARKERS; RAPD SO - Plant Science 2003 ;165(3):595-601 8186 UI - 8839 AU - Gonzalez GM AU - Tijerina R AU - Najvar LK AU - Bocanegra R AU - Rinaldi MG AU - Loebenberg D AU - Graybill JR AD - Univ Autonoma Nuevo Leon, Dept Microbiol, Fac Med, Monterrey 64460, Nuevo Leon, MexicoUniv Texas, Hlth Sci Ctr, Div Infect Dis 7881, Dept Med, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78229, USAS Texas Vet Hlth Care Syst, Audie L Murphy Div, San Antonio, TX 78229, USASchering Plough Corp, Inst Res, Kenilworth, NJ 07033, USAGonzalez, GM, Univ Autonoma Nuevo Leon, Dept Microbiol, Fac Med, Madero & Dr Eduardo A Pequeno S-N,Colonia Mitras, Monterrey 64460, Nuevo Leon, Mexico TI - Activity of posaconazole against Pseudallescheria boydii: In vitro and in vivo assays AB - Thirty isolates of Pseudallescheria boydii were tested to compare the in vitro activity of posaconazole with those of fluconazole and itraconazole, using NCCLS methods. Posaconazole was evaluated in an immunosuppressed mouse model of disseminated pseudallescheriasis. Posaconazole was more effective than itraconazole and as effective as fluconazole in preventing death and significantly reducing the CFU of P. boydii from tissues MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000181842000044 L2 - INFECTION; SCH56592; MODEL SO - Antimicrobial Agents and Chemotherapy 2003 ;47(4):1436-1438 8187 UI - 7139 AU - Gonzalez H AU - Nagai Y AU - Bub G AU - Glass L AU - Shrier A AD - McGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaUniv Nacl Autonoma Mexico, Lab Biofis, Mexico City 04510, DF, MexicoGlass, L, McGill Univ, Dept Physiol, 3655 Drummond St, Montreal, PQ H3G 1Y6, Canada TI - Reentrant waves in a ring of embryonic chick ventricular cells imaged with a Ca2+ sensitive dye AB - According to the classic model initially formulated by Mines, reentrant cardiac arrhythmias may be associated with waves circulating in a ring geometry. This study was designed to study the dynamics of reentry in a ring geometry of cardiac tissue culture. Reentrant calcium waves in rings of cultured embryonic chick cardiac myocytes were imaged using a macroscope to monitor the fluorescence of intracellular Calcium Green-1 dye. The rings displayed a variety of stable rhythms including pacemaker activity and spontaneous reentry. Waves originating from a localized pacemaker could lead to reentry as a consequence of unidirectional block. In addition, more complex patterns were observed due to the interactions between reentrant and pacemaker rhythms. These rhythms included instances in which pacemakers accelerated the reentrant rhythm, and instances in which the excitation was blocked in the vicinity of pacemakers. During reentrant activity an appropriately timed electrical stimulus could induce resetting of activity or cause complete annihilation of the propagating waves. This experimental preparation reveals many spontaneously occuring complex rhythms. These complex rhythms are hypothesized to reflect interactions between spontaneous pacemakers, wave propagation, refractory period, and overdrive suppression. This preparation may serve as a useful model system to further investigate complex dynamics arising during reentrant rhythms in cardiac tissue. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Biology U5 - J;Article AV - English IS - 0303-2647 UR - ISI:000186241800009 L2 - cardiac arrhythmias;reentrant tachycardia;pacemakers;refractory period;overdrive suppression;unidirectional block;CARDIAC TISSUE; PATTERNED GROWTH; EXCITABLE MEDIA; HEART-CELLS; MODEL; ANNIHILATION; TACHYCARDIA; PROPAGATION; MONOLAYERS; CONDUCTION SO - Biosystems 2003 ;71(1-2):71-80 8188 UI - 8624 AU - Gonzalez JA AU - Holder LB AU - Cook DJ AD - INAOE, Puebla, MexicoUniv Texas, Dept Comp Sci & Engn, Arlington, TX 76019, USAGonzalez, JA, INAOE, Puebla, Mexico TI - Experimental comparison of graph-based relational concept learning with inductive logic programming systems AB - We compare our graph-based relational concept learning approach "SubdueCL" with the ILP systems FOIL and Progol. In order to be fair in the comparison, we use the conceptual graphs representation. Conceptual graphs have a standard translation from graphs into logic. In this way, we introduce less bias during the translation process. We experiment with different types of domains. First, we show our experiments with an artificial domain to describe how SubdueCL performs with the conceptual graphs representation. Second, we experiment with several flat and relational domains. The results of the comparison show that the SubdueCL system is competitive with ILP systems in both flat and relational domains MH - Mexico|Puebla MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000182547800006 SO - Inductive Logic Programming 2003 ;2583():84-100 8189 UI - 7404 AU - Gonzalez MC AU - Enriquez D AU - Ulloa M AU - Hanlin RT AD - Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoMinist Ciencia Tecnol & Medio Ambiente, Inst Oceanol, Dept Microbiol Marina, Havana, CubaUniv Georgia, Dept Plant Pathol, Athens, GA 30602, USAGonzalez, MC, Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, Mexico TI - A preliminary survey of marine fungi from Cuba AB - A preliminary survey of the Cuban marine fungi was undertaken. Twenty six marine fungi are reported from 12 beaches located on the Atlantic Coast, of which, 19 (16 ascomycetes and 3 mitosporic fungi) are new for this country. This brings the total number of known higher marine fungi for Cuba to 29 MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Editorial Material AV - English IS - 0093-4666 UR - ISI:000185523700045 L2 - Ascomycota;arenicolous fungi;biodiversity;Caribbean Islands;mitosporic fungi;mycobiota;INCLUDING 2; MAGNITUDE; ISLANDS; GENERA SO - Mycotaxon 2003 ;87():457-465 8190 UI - 7535 AU - Gonzalez P AU - Valcarce A AU - Garcilazo H AU - Vijande J AD - Univ Valencia, Dept Fis Teor, CSIC, E-46100 Valencia, SpainUniv Valencia, IFIC, CSIC, E-46100 Valencia, SpainUniv Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoGonzalez, P, Univ Valencia, Dept Fis Teor, CSIC, E-46100 Valencia, Spain TI - Heavy meson description with a screened potential AB - We perform a quark model calculation of the b (b) over bar and c (c) over bar spectra from a screened funnel potential form suggested by unquenched lattice calculations. A connection between the lattice screening parameter and an effective gluon mass directly derived from QCD is established. Spin-spin energy splittings, leptonic widths, and radiative decays are also examined providing a test for the description of the states MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185193600031 L2 - YANG-MILLS THEORY; STRING BREAKING; QCD; MODEL; CHROMODYNAMICS; CHARMONIUM; VERTEX SO - Physical Review D 2003 ;68(3): 8191 UI - 7082 AU - Gonzalez R AU - Reguera E AU - Figueroa JM AU - Martinez JD AD - Univ La Habana, Inst Mat & Reagents, Fac Quim, Havana 10400, CubaUniv La Habana, Fac Fis, Inst Mat & Reagents, Havana 10400, CubaInst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Mexico City 11500, DF, MexicoGonzalez, R, Univ La Habana, Inst Mat & Reagents, Fac Quim, Havana 10400, Cuba TI - Study of the influence of nejayote and other additives on the cohesive strength and electric properties of carbon black agglomerates AB - An investigation was carried out on the influence of nejayote and other additives (water, potassium lignosulfonate, and furfuryl alcohol), on the cohesive strength and electrical properties of carbon black agglomerates. The thermal stability of carbon black agglomerates with potassium lignosulfonate and nejayote was similar. The influence of nejayote and potassium lignosulfonate on the cohesive strength of carbon black agglomerates was also similar but the electrical properties were different. The carbon black agglomerates with nejayote have a lower electrical conductivity. The influence of water on the cohesive strength of carbon black agglomerates was not significant but it was important in their electrical conductivity. Nejayote, a waste by-product from the corn-processing industry, appears as a potential agglutinant in the carbon black pelletization process. (C) 2003 Wiley Periodicals, Inc MH - Cuba MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000186374700027 L2 - additives;cohesion;carbon black agglomerates;electrical conductivity;agglutination;TRIFLUOROACETIC-ACID; FURFURYL ALCOHOL; POLYMERIZATION; POLYANILINE; CONDUCTIVITY; DISPERSION; POLYMERS; MAIZE; ETHER; DRY SO - Journal of Applied Polymer Science 2003 ;90(14):3965-3972 8192 UI - 9125 AU - Gonzalez RA AU - Loinard L AU - Allen RJ AU - Muller S AD - Natl Autonomous Univ Mexico, Inst Astron, Morelia 58190, Michoacan, MexicoSpace Telescope Sci Inst, Baltimore, MD 21218, USAInst Radio Astron Millimetr, F-38406 St Martin Dheres, FranceGonzalez, RA, Natl Autonomous Univ Mexico, Inst Astron, Morelia 58190, Michoacan, Mexico TI - The opacity of nearby galaxies from counts of background galaxies. II. Limits of the Synthetic Field Method AB - Recently, we have developed and calibrated the Synthetic Field Method to derive the total extinction through disk galaxies. The method is based on the number counts and colors of distant background field galaxies that can be seen through the foreground object; it is the only method capable of determining extinction without a priori assumptions about the dust properties or its spatial distribution, and it has been successfully applied to NGC 4536 and NGC 3664, two late-type galaxies located, respectively, at 16 and 11 Mpc. Here we study the applicability of the Synthetic Field Method to Hubble Space Telescope (HST) images of galaxies in the Local Group and show that background galaxies cannot be easily identified through these nearby objects, even with the best resolution available today. In the case of M31, each pixel in the HST images contains 50 100 stars, and the background galaxies cannot be seen because of the intrinsic granularity due to strong surface brightness fluctuations. In the LMC, on the other hand, there is only about one star every 6 linear pixels, and the lack of detectable background galaxies results from a "secondary" granularity, introduced by structure in the wings of the point-spread function (PSF). The success of the Synthetic Field Method in NGC 4536 and NGC 3664 is a natural consequence of the reduction of the intensity of surface brightness fluctuations with distance. When the dominant confusion factor is structure in the PSF wings, as is the case of HST images of the LMC and would be the case of M31 images obtained with a 10 m difraction-limited optical telescope, it becomes possible, in principle, to improve the detectability of background galaxies by subtracting the stars in the foreground object. However, a much better characterization of optical PSFs than is currently available would be required for an adequate subtraction of the wings. Given the importance of determining the dust content of Local Group galaxies, efforts should be made in that direction MH - France MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000181094700017 L2 - dust, extinction;galaxies : general;galaxies : individual (M31, NGC 4536, Large Magellanic Cloud);galaxies : ISM;galaxies : spiral;galaxies : statistics;ISM : general;Local Group;HUBBLE-SPACE-TELESCOPE; MEDIUM DEEP SURVEY; MASSIVE MOLECULAR CLOUDS; INNER DISK; STAR-FORMATION; HIGH-REDSHIFT; CO EMISSION; WFPC2; M31; DUST SO - Astronomical Journal 2003 ;125(3):1182-1203 8193 UI - 8488 AU - Gonzalez S AU - Sousa C AU - Illas F AD - Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainUniv Barcelona, Ctr Especial Recerca Quim Teorica, E-08028 Barcelona, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoGonzalez, S, Univ Barcelona, Dept Quim Fis, Parc Cient Barcelona C Marti Franques 1, E-08028 Barcelona, Spain TI - Theoretical study of the chemisorption of CO on bimetallic RhCu surfaces and nanoparticles AB - The CO interaction with bimetallic RhCu surface models representing several compositions has been studied by first principles density functional theory calculations. The analysis of the bare bimetallic clusters Rh(4s) and Cu(3s) core-level binding energies indicates that is not possible to extract information about the oxidation state of the alloy components. The present calculations predict that CO does always sit on top sites, the influence of the alloy composition on the equilibrium geometry and vibrational frequency of CO chemisorbed at a given Rh or Cu site being very small. However, there is a large difference in the structural properties corresponding to CO chemisorption above either Rh or Cu. Therefore, the absolute value of the vibrational frequency of chemisorbed CO does not permit to extract any information about the alloy composition but afford to assign the chemisorption site. Finally, the CO adsorption energy does not follow a monotonic trend with composition. The use of the Constrained Space Orbital Variation analysis permits one to firmly establish that the difference in adsorption energy for different compositions cannot be explained through differences in the a-donation and pi-backdonation mechanisms. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000182744400008 L2 - alloys;density functional calculations;chemisorption;metallic surfaces;carbon monoxide;METAL-SURFACES; CLUSTER MODEL; VIBRATIONAL FREQUENCY; PDCU(111) SURFACES; BONDING MECHANISM; ORGANIC-MOLECULES; TRANSITION-METAL; BINDING-ENERGIES; ALLOY SURFACE; 100 SURFACES SO - Surface Science 2003 ;531(1):39-52 8194 UI - 6005 AU - Goodman KJ AU - O'Rourke K AU - Day RS AU - Redlinger T AU - Sanchez J AU - Wang C AU - Campos A AU - de la Rosa M AD - Univ Texas, Hlth Sci Ctr, Sch Publ Hlth, Houston, TX 77225, USAUniv Texas, El Paso, TX 79968, USATexas Tech Univ, Ctr Hlth Sci, El Paso, TX, USAMexican Social Secur Inst, Ciudad Juarez, MexicoMed Univ S Carolina, Charleston, SC 29425, USAGoodman, KJ, Univ Texas, Hlth Sci Ctr, Sch Publ Hlth, POB 20186, Houston, TX 77225 USA TI - Establishment of an binational cohort to Helicobacter pylori infection in children AB - Chronic Helicobacter (H.) pylori infection, typically of childhood onset, causes upper digestive tract diseases of major impact among socioeconomically marginalized populations. This infection is common in children from ethnic minorities in the United States, and particularly so in immigrant children from Mexico. Prevention measures for H. pylori infection do not yet exist, given limited understanding of what causes either acute or persistent infection. To address this gap, we initiated the Pasitos Cohort Study to follow children from low-income families in the border region that includes El Paso County, Texas, and Ciudad Juarez, Chihuahua. The children were enrolled prior to birth, and are examined at 6-month intervals to observe the natural history of H. pylori infection, and to identify risk factors for acquisition, recurrence, and persistence. This report details the study methods, describes how the cohort was established, and discusses the challenges of compliance with follow up in the border setting. Between April 1998 and October 2000, 1,288 pregnant women were screened for eligibility; 807 of 994 eligible women consented to participate. Birth documentation was obtained for 615 infants, and 472 entered follow up. Successful follow up of this cohort requires resources, including a well-trained, dedicated staff, and incentives, to facilitate and motivate long-term participation. Future findings from this ongoing study will help to fill critical gaps in knowledge regarding the epidemiology of H. pylori infection, and will contribute to the identification of prevention strategies MH - Mexico|Chihuahua MH - USA PB - ATLANTA: I S H I B RP - NOT IN FILE U3 - TC 2 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1049-510X UR - ISI:000220168200012 L2 - birth cohort;border health;child;cohort study;epidemiology;Helicobacter pylori infection;hispanic;Mexico;United States;NONDISPERSIVE INFRARED SPECTROMETER; DIARRHEAL DISEASE; NATURAL-HISTORY; BREATH SAMPLES; ACQUISITION; EPIDEMIOLOGY; ADOLESCENTS; INFANCY; AGE; CAMPYLOBACTER SO - Ethnicity & Disease 2003 ;13(3):387-394 8195 UI - 8336 AU - Gopalswamy N AU - Yashiro S AU - Lara A AU - Kaiser ML AU - Thompson BJ AU - Gallagher PT AU - Howard RA AD - NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USACatholic Univ Amer, Dept Phys, Inst Astrophys & Computat Sci, Washington, DC 20064, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoL3 Com Anal Corp, Greenbelt, MD, USAUSN, Res Lab, Solar Phys Branch, Div Space Sci, Washington, DC 20375, USAGopalswamy, N, NASA, Goddard Space Flight Ctr, Code 695, Greenbelt, MD 20771 USA TI - Large solar energetic particle events of cycle 23: A global view AB - [1] We report on a study of all the large solar energetic particle (SEP) events that occurred during the minimum to maximum interval of solar cycle 23. The main results are: 1. The occurrence rate of the SEP events, long-wavelength type II bursts and the fast and wide frontside western hemispheric CMEs is quite similar, consistent with the scenario that CME-driven shocks accelerate both protons and electrons; major flares have a much higher rate. 2. The SEP intensity is better correlated with the CME speed than with the X-ray flare class. 3. CMEs associated with high-intensity SEPs are about 4 times more likely to be preceded by wide CMEs from the same solar source region, suggesting the importance of the preconditioning of the eruption region. We use a specific event to demonstrate that preceding eruption from a nearby source can significantly affect the properties of SEPs and type II radio bursts MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000183178000002 L2 - CORONAL MASS EJECTIONS; RADIO SO - Geophysical Research Letters 2003 ;30(12): 8196 UI - 7961 AU - Gordienko E AU - Yushkevich A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv N Carolina, Dept Math, Charlotte, NC 28223, USAGordienko, E, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Av San Rafael Atlixco,186 Col Vicentina, Mexico City 09340, DF, Mexico TI - Stability estimates in the problem of average optimal switching of a Markov chain AB - We consider a switching model for a Markov chain x(t) with a transition probability p(x\B). The goal of a controller is to maximize the average gain by selecting a sequence of stopping times, in which the controller gets rewards and pays costs (depending on x(t)) in an alternating order. We suppose that the exact transition probability function of the original "real" chain x(t) is not available to the controller, and he/she is forced to rely on a given approximation (p) over tilde to the unknown p. The controller finds a switching policy (π) over tilde optimal for the Markov chain with the transition probability (p) over tilde, with a view to apply (π) over tilde to the original Markov chain x(t). Under certain restrictions on p we give an upper bound for the difference between the maximal gain attainable in switching of x(t), and the gain made under the policy (π) over tilde in the original model. The bound is expressed in terms of the total variation distance (x) (sup) Var(p(x\.), (p) over tilde (x\.)) MH - Mexico|Distrito Federal MH - USA PB - HEIDELBERG: PHYSICA-VERLAG GMBH & CO RP - NOT IN FILE U3 - TC 0 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 1432-2994 UR - ISI:000184113300001 L2 - positive Harris recurrent chain;average reward;multiple stopping;stability index;total variation metric;UNBOUNDED COSTS SO - Mathematical Methods of Operations Research 2003 ;57(3):345-365 8197 UI - 7293 AU - Gordon N AU - Mullen CA AU - Tran H AU - Worth L AU - Almaguer DG AU - Chan KW AD - Univ Texas, MD Anderson Canc Ctr, Div Pediat, Houston, TX 77030, USAUniv Texas, MD Anderson Canc Ctr, Div Canc Med, Houston, TX 77030, USAUniv UANL Monterrey, Hematol Serv Hosp, Monterrey, MexicoChan, KW, Univ Texas, MD Anderson Canc Ctr, Div Pediat, 1515 Holcombe Blvd,Unit 87, Houston, TX 77030 USA TI - Fludarabine and once-daily intravenous busulfan for allogeneic bone marrow transplantation for Chediak-Higashi syndrome AB - An HLA-identical sibling bone marrow transplant was done for a patient with Chediak-Higashi syndrome. The preparative regimen included intravenous fludarabine (40 mg/m(2)/d x 4) and busulfan (130 mg/m(2)/d x 4). Busulfan was given once daily. Pharmacokinetic studies showed the area under the concentration-time curve of the once-daily intravenous busulfan was similar to that seen with the total daily dose administered with an every-6-hourly regimen. Toxicity was minimal. Myeloid engraftment occurred on day + 17 and donor chimerism was complete. Fludarabine and once-daily intravenous busulfan is well tolerated and is adequate for engraftment of sibling transplant in Chediak-Higashi syndrome MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Oncology;Hematology;Pediatrics U5 - J;Article AV - English IS - 1077-4114 UR - ISI:000185790000017 L2 - bone marrow transplantation;Chediak-Higashi syndrome;fludarabine;intravenous busulfan;preparative regimen;STEM-CELL TRANSPLANTATION; PHARMACOKINETICS; CHILDREN; THERAPY; PATIENT; DEFECT SO - Journal of Pediatric Hematology Oncology 2003 ;25(10):824-826 8198 UI - 8906 AU - Gorin T AU - Seligman TH AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoMax Planck Inst Kernphys, D-69029 Heidelberg, GermanyGorin, T, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Avenida Univ S-N, Cuernavaca 62210, Morelos, Mexico TI - Decoherence in chaotic and integrable systems: a random matrix approach AB - We study the influence of chaos and order on entanglement and decoherence. In view of applications in quantum computing and teleportation which should be able to work with arbitrarily complicated states, we pay particular attention to the behavior of random states. While studies with coherent states indicate that chaos accelerates decoherence and entanglement, we find that there is practically no difference between the chaotic and the integrable case, as far as random states are concerned. In the present studies we use unitary time evolution of the total system, and partial traces to emulate decoherence. Random matrix models are a natural choice to describe the dynamics of random states. The invariant aspects of chaos and order are then reflected in the different spectral statistics. We develop random matrix models for the evolution of entanglement for a large variety of situations, discussing the strong coupling case in full detail. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000181589000009 L2 - QUANTUM; TRANSITION; BEHAVIOR; SPECTRA; MOTION SO - Physics Letters A 2003 ;309(1-2):61-67 8199 UI - 7301 AU - Gorinstein S AU - Yamamoto K AU - Kobayashi S AU - Taniguchi H AU - Pawelzik E AU - gado-Licon E AU - Shaoxian Y AU - Hongliang S AU - Leticia A AU - Ayala M AU - Trakhtenberg S AD - Hebrew Univ Jerusalem, Hadassah Med Sch, Sch Pharm, Dept Med Chem & Nat Prod, IL-91120 Jerusalem, IsraelHebrew Univ Jerusalem, David R Bloom Ctr Pharm, IL-91120 Jerusalem, IsraelMinist Agr Forestry & Fisheries, Natl Food Res Inst, Tsukuba, Ibaraki 305, JapanIwate Univ, Fac Agr, Morioka, Iwate 020, JapanChubu Univ, Coll Biosci & Biotechnol, Aichi, JapanUniv Gottingen, Inst Agr Chem, D-3400 Gottingen, GermanyTechnol Inst Durango, Dept Chem & Biochem, Durango, MexicoChinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Beijing, Peoples R ChinaInst Politecn Nacl, Ctr Desarrollo Prod Bioticos, Dept Biotechnol, Yautepec, Morelos, MexicoKaplan Med Ctr, Inst Cardiol, Rehovot, IsraelGorinstein, S, Hebrew Univ Jerusalem, Hadassah Med Sch, Sch Pharm, Dept Med Chem & Nat Prod, POB 12065, IL-91120 Jerusalem, Israel TI - Inter-relationship between electrophoretic characteristics of pseudocereal and cereal proteins and their microscopic structure for possible substitution based on nutritional evaluation AB - Amaranth, soybean and maize were screened for proteins and their nutritional value. Isopropanol-soluble protein and buffer-soluble protein fractions were extracted from seeds and separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The comparison of the identity and differences between investigated plants was carried out by the obtained SDS-PAGE electrophoretic patterns, and their microstructure was determined by scanning electron microscopy. Electrophoretic patterns of extracted proteins have shown that the main protein subunits were concentrated between 10 and 50 kDa. Variations were found in major fractions and minor bands as well as in the fine structure. The microstructure of pseudocereal and cereal protein fractions was inter-related with the results obtained by their electrophoretic separation. Pseudocereal amaranth can be used as a nutritive substitute of cereal maize in functional foods MH - Germany MH - Israel MH - Japan MH - Mexico|Durango MH - Mexico|Morelos MH - Peoples R China PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0963-7486 UR - ISI:000185688500003 L2 - AMINO-ACID; CHEMICAL-CHARACTERIZATION; AMARANTH; WHEAT; ALLERGY; RICE; CORN; MICROSTRUCTURE; GLUTELINS; FRACTIONS SO - International Journal of Food Sciences and Nutrition 2003 ;54(6):427-435 8200 UI - 7962 AU - Gorley PN AU - Vorobiev YV AU - Makhniy VP AU - Parfenyuk O AU - Ilashchuk M AU - Gonzalez-Hernandez J AU - Horley PP AD - CINVESTAV, Queretaro 76230, MexicoChernivtsi Natl Univ, Dept Phy Elect & Nontradit Energy Source, UA-58012 Chernovtsy, UkraineVorobiev, YV, CINVESTAV, Libramiento Norponiente 2000,Fracc Real Juriquill, Queretaro 76230, Mexico TI - Electric and photoelectric properties of semi-insulating crystals of CdTe : Pb AB - CdTe:Pb monocrystals were grown by the Bridgemann method. The impurity concentration in the melt was in the ranges of N-Pb(0) = 10(18)-5 x 10(19) cm(-3). From the electric measurements it turns out that the lead creates deep levels with E-V + 0.43 eV in CdTe. At the mentioned concentrations, N-Pb(0) the hole concentration is (6.11 x 10(9)-1.98 x 10(13)) cm(-3). From the photoelectric measurements it follows that recombination processes in CdTe:Pb could be explained by the presence of the defects with significantly different trapping cross-sections of electrons and holes (S-pr much greater than S-nr). The trapping asymmetry of the mentioned centers was defined to be S-pr/S-nr > 10(6). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000184120300139 L2 - photoelectric measurements;photoconductivity;cadmium telluride;defects;photorefraction;PHOTOREFRACTIVE CDTE; SN SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2003 ;99(1-3):584-587 8201 UI - 8510 AU - Gorley PN AU - Vorobiev YV AU - Gonzalez-Hernandez J AU - Horley PP AD - CINVESTAV Queretaro, Queretaro 76230, MexicoChernivtsi Natl Univ, Dept Phys Elect & Non Tradit Energy Sources, UA-58012 Chernovtsy, UkraineVorobiev, YV, CINVESTAV Queretaro, Libramiento Norponiente 2000,Fracc Real Juriquill, Queretaro 76230, Mexico TI - Analytical solution of the Schrodinger equation for an electron confined in a triangle-shaped quantum well AB - For the triangular-shaped quantum well, the electron wave functions and energy values are found by analytical solution of the Shrodinger equation. In approximation of impenetrable walls, two sets of solutions are obtained, one corresponding to the symmetric, and the other to antisymmetric wave functions. The distributions of the probability density give a clear picture of standing waves in a triangular-shaped plate. The comparison of the system energy levels with those obtained for quasi-periodic boundary conditions give reasonable coincidence. The results obtained proved to be useful in explanation of electronic optical absorption spectra of some of the organic colorants, on the basis of FEMO approach (free electron molecular orbitals); it could be used for other nanosystems with particles of triangular shape. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Optics;Physics, Applied U5 - J;Article AV - English IS - 0167-9317 UR - ISI:000182725500007 L2 - quantum well;energy;wave function;absorption spectrum SO - Microelectronic Engineering 2003 ;66(1-4):39-45 8202 UI - 8898 AU - Goulson D AU - Derwent LC AU - Penagos DI AU - Williams T AD - Univ Southampton, Sch Biol Sci, Biodivers & Ecol Div, Southampton SO16 7PX, Hants, EnglandECOSUR, Tapachula 30700, Chiapas, MexicoGoulson, D, Univ Southampton, Sch Biol Sci, Biodivers & Ecol Div, Biomed Sci Bldg,Bassett Crescent E, Southampton SO16 7PX, Hants, England TI - Effects of optical brighteners included in biopesticide formulations on the growth of crops AB - Stilbene-derived optical brighteners are compounds that absorb ultraviolet (UV) radiation and emit visible blue wavelengths. When mixed with baculoviruses they can enhance the infectivity, rendering the viruses more efficient as control agents of insect pests. Formulations of baculoviruses with optical brighteners are being tested for control of crop and forest lepidopterous insects in North America. A possible consequence of field applications of optical brighteners on the growth of crops was examined. Application of the optical brightener Tinopal CBS increased reflectance of leaf surfaces, particularly in the region 420-470nm. In glasshouse trials, foliar applications of 5% solutions reduced growth of maize by about 25%, while 1% solutions reduced growth of barley by about 30-40%. Foliar applications appeared to have no effect on growth of three dicotyledonous crops. Possible explanations for these differences between crops are discussed. Field trials are needed to ascertain whether the increased efficacy of biopesticides gained by including optical brighteners in formulations is sufficient to offset the reductions in growth that can be expected in some crops. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Chiapas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000181704100020 L2 - tinopal CBS;reflectance;growth rate;yield;NUCLEAR POLYHEDROSIS-VIRUS; GYPSY-MOTH LEPIDOPTERA; FALL ARMYWORM LEPIDOPTERA; FLUORESCENT BRIGHTENER; FIELD; NUCLEOPOLYHEDROVIRUS; BACULOVIRUSES; INFECTIVITY SO - Agriculture Ecosystems & Environment 2003 ;95(1):235-240 8203 UI - 9623 AU - Goyal SK AU - Cardenas-Barron LE AD - Concordia Univ, Dept Decis Sci, Montreal, PQ H3G 1M8, CanadaConcordia Univ, Fac Commerce & Adm, MIS, Montreal, PQ H3G 1M8, CanadaITESM, Dept Ind & Syst Engn, Monterrey 64849, NL, MexicoGoyal, SK, Concordia Univ, Dept Decis Sci, 1455 Maisonneuve Blvd W, Montreal, PQ H3G 1M8, Canada TI - Note on: An optimal batch size for a production system operating under periodic delivery policy AB - In this note we present a comparative study of solutions given by Sarker and Khan [Comput Ind Engng 37 (1999) 711]. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Engineering, Industrial U5 - J;Article AV - English IS - 0360-8352 UR - ISI:000179686800012 L2 - optimal batch size;production system;periodic delivery policy SO - Computers & Industrial Engineering 2003 ;44(1):191-192 8204 UI - 7163 AU - Goycoolea FM AU - Heras A AU - Aranaz I AU - Galed G AU - Fernandez-Valle ME AU - rguelles-Monal W AD - CIAD AC, Hermosillo 83000, Sonora, MexicoUniv Complutense, Fac Farm, Dept Quim Fis 2, Inst Estudios Biofunc, E-28040 Madrid, SpainInst Pluridisciplinar, CAI RMN, Madrid 28040, SpainCIAD AC, Unidad Guaymas, Guaymas 85440, Sonora, MexicoGoycoolea, FM, CIAD AC, Apdo Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Effect of chemical crosslinking on the swelling and shrinking properties of thermal and pH-responsive chitosan hydrogels AB - The ability to form a get through the physical or chemical crosslinking of chitosan has been well documented. In an attempt to mimic biological systems, thermal and pH-sensitive chitosan cylindrical hydrogels were produced by a combination of physical and chemical crosslinking processes. To this end, chitosan hydrogels prepared from alkali chitin were molded in cylinders and, once washed, were further crosslinked with glutaraldehyde at stoichiometric ratios, R (= [-CH=O]/[-NH2]), of 1.61 and 3.2-2 x 10(-2). Variation in swelling as a result of stepwise changes, in temperature between 40 and 2degreesC at pH values of 7.0, 7.6, and 8.0 revealed that the system responds in markedly different manners dependent upon the pH. At pH 7.0, cooling from 40 to 2 degreesC results in contraction of the gel network structure, While raising the temperature from 2 to 40degreesC leads to a rapid swelling response (i.e., ca. a twofold increase in the amount of solvent uptake), Subsequent cooling to 2 degreesC 6 accompanied by a new contraction cycle. At pH greater than or equal to 7.6 the temperature dependence of the swelling-contraction behavior is exactly the opposite of that observed at pH 7.0. Very similar trends were observed for the gels at both degrees of crosslinking. The swelling-shrinking behavior observed in gels of pH greater than or equal to 7.6, is similar in kind to that of uncrosslinked gels and is interpreted in terms of a lower critical solution temperature (LCST) volume phase transition, driven by hydrophobic association, presumably involving residual acetyl groups in the chitin. The results at pH 7.0 suggest that the slight ionization of the -NH3+ groups leads to destruction of the hydrophobic hydration thus effectively reversing the negative thermal shrinking MH - Mexico|Sonora MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 1616-5187 UR - ISI:000186165700018 L2 - chitosan;crosslinking;hydrogels;swelling;thermosensitivity;N-ISOPROPYLACRYLAMIDE GELS; THERMOSENSITIVE HYDROGELS; CHEMOMECHANICAL SYSTEMS; DRUG-RELEASE; CHITIN; GLUTARALDEHYDE; ACETYLATION; ACID; DEACETYLATION; SOLUBILITY SO - Macromolecular Bioscience 2003 ;3(10):612-619 8205 UI - 6660 AU - Grafener G AU - Hamann WR AU - Pena M AD - Univ Potsdam, Dept Phys, Potsdam, Germany. UNAM, Mexico City, DF, Mexico TI - Spectral analysis of the LMC [WC] star SMP 61 AB - HST UV and optical spectra of the early-type [WC] star SMP 61 in the LMC are analyzed by means of line blanketed non-LTE models for expanding atmospheres. The known distance to the LMC allows a reliable determination of the stellar parameters. The low iron surface abundance of the object possibly indicates a preceding evolution through a very late thermal pulse (VLTP) MH - Germany MH - Mexico|Distrito Federal T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400183 SO - 2003 ;(209):577-578 8206 UI - 8260 AU - Graham PH AU - Rosas JC AU - de Jensen CE AU - Peralta E AU - Tlusty B AU - costa-Gallegos J AU - Pereira PAA AD - Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108, USAEscuela Agr Panamer, Tegucigalpa, HondurasUniv Minnesota, Dept Plant Pathol, St Paul, MN 55108, USAINIAP, Estac Expt Santa Catalina, Panamer Al Sur, Quito, EcuadorINIFAP, Chapingo 56230, MexicoEMBRAPA, CNPAF, BR-74000 Goiania, Go, BrazilGraham, PH, Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USA TI - Addressing edaphic constraints to bean production: the Bean/Cowpea CRSP project in perspective AB - Edaphic factors constrain bean production in most areas where this crop is grown. They include nutrient constraints particularly N and P deficiency, soil acidity including Al and manganese toxicity, and drought. The Bean/Cowpea Collaborative Research Support Program (CRSP) has supported research on edaphic constraints to bean production since its inception, the major partnerships involving the University of Wisconsin and EMBRAPA, Brazil (1981-1989) and the University of Minnesota and INIAP, Ecuador (1989-2002). Research over this period has emphasized cultivar and strain variation in nodulation and nitrogen (N-2) fixation, host strain interaction and coevolution, host and strain tolerance of soil acidity, and nitrogen fixation under phosphorus limited conditions. This paper reviews recent developments in these areas of nitrogen fixation research, but does so from the perspective of the Bean/Cowpea CRSP project. (C) 2003 Elsevier Science B.V. All rights reserved MH - USA MH - Brazil MH - Ecuador MH - Honduras MH - Mexico|Estado De Mexico PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Review AV - English IS - 0378-4290 UR - ISI:000183397900008 L2 - Phaseolus vulgaris;cultivar variation;nitrogen fixation;nodulation;host-rhizobium interaction;soil acidity;phosphorus;zinc deficiency;PHASEOLUS-VULGARIS L; BIOLOGICAL NITROGEN-FIXATION; LEGUMINOSARUM BV PHASEOLI; RHIZOBIUM-TROPICI UMR1899; SYMBIOTIC N-2 FIXATION; ACID-PH TOLERANCE; DINITROGEN FIXATION; EARLY NODULATION; SEED YIELD; PHOSPHORUS AVAILABILITY SO - Field Crops Research 2003 ;82(2-3):179-192 8207 UI - 6810 AU - Gratsiansky N AU - de Couto AA AU - Zuniga MA AU - Enar R AU - Sheikh SA AU - Macarie C AD - Inst Phys Chem Med, Moscow, RussiaHosp Univ Antonio Pedro, Rio De Janeiro, BrazilIMSS, Hosp Especialidades, CMN Occidente, Guadalajara, MexicoHaseki Univ, Inst Cardiol, Istanbul, TurkeyPunjab Inst Cardiol, Lahore, PakistanFundeni Clin Hosp, Inst Cardiovasc Dis, Bucharest, Romania TI - Enoxaparin for the treatment of unstable angina and non-ST-segment elevation myocardial infarction: the ENO-INT study MH - Brazil MH - Mexico|Jalisco MH - Pakistan MH - Romania MH - Russia MH - Turkey PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000185638801978 SO - European Heart Journal 2003 ;24():543-543 8208 UI - 7299 AU - Graybill JR AU - Bocanegra R AU - Gonzalez GM AU - Najvar LK AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, San Antonio, TX 78229, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, NL, MexicoNajvar, LK, Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Combination antifungal therapy of murine aspergillosis: liposomal amphotericin B and micafungin AB - Objectives: AmBisome and micafungin were used alone and in combination in a series of studies designed to identify any additive or antagonistic effects of combination antifungal therapy. Methods: Immune-suppressed mice were infected either intravenously or intranasally with Aspergillus fumigatus. Micafungin, liposomal amphotericin B or both drugs together were administered for 7 days. Parameters of efficacy included survival and tissue burden of A. fumigatus. Results: Whilst each drug was effective in murine aspergillosis, additive effects were observed only in reduction of tissue burden in limited experimental conditions. No antagonism was seen. Conclusions: The present studies neither encourage nor discourage clinical use of combination therapy. Clinical trials are suggested before combined therapy is routinely adopted MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 25 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0305-7453 UR - ISI:000185732100021 L2 - antifungals;Aspergillus fumigatus;invasive aspergillosis;PERSISTENTLY NEUTROPENIC RABBITS; EXPERIMENTAL PULMONARY ASPERGILLOSIS; INVASIVE ASPERGILLOSIS; ECHINOCANDIN CASPOFUNGIN; DISSEMINATED CANDIDIASIS; MOUSE MODELS; EFFICACY; FUMIGATUS; LY303366; PHARMACOKINETICS SO - Journal of Antimicrobial Chemotherapy 2003 ;52(4):656-662 8209 UI - 8332 AU - Graybill JR AU - Najvar LK AU - Gonzalez GM AU - Hernandez S AU - Bocanegra R AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, San Antonio, TX 78229, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, NL, MexicoGraybill, JR, Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Improving the mouse model for studying the efficacy of voriconazole AB - Outbred ICR mice were rendered neutropenic, infected intravenously with Fusarium solani and treated orally with voriconazole. When given alone, voriconazole was not protective up to 40 mg/kg/day. When grapefruit juice was administered before infection, mice were protected by voriconazole. The mechanism may be inhibition of gut mucosal cytochrome enzymes that rapidly degrade voriconazole in the mouse. These murine studies support expansion of voriconazole therapy in other highly resistant systemic mycoses MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 10 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0305-7453 UR - ISI:000183091800008 L2 - voriconazole;mice;grapefruit juice;DISSEMINATED ASPERGILLOSIS; GRAPEFRUIT JUICE; MURINE; ITRACONAZOLE; CANDIDIASIS; L-743,872; MICE SO - Journal of Antimicrobial Chemotherapy 2003 ;51(6):1373-1376 8210 UI - 8640 AU - Gregory TJ AU - Chemnick J AU - Salas-Morales S AU - Vovides AP AD - Montgomery Bot Ctr, San Francisco, CA 94080, USASociedad Estudio Recursos Biot Oaxaca, Oaxaca, MexicoInst Ecol AC, Xalapa, Veracruz, MexicoGregory, TJ, Montgomery Bot Ctr, 1 DNA Way, San Francisco, CA 94080, USA TI - A new species in the genus Dioon (Zamiaceae) from north-central Oaxaca, Mexico AB - Dioon argenteum sp. nov. (Zamiaceae) is described from northern Oaxaca, Mexico. Flat leaves, and persistently tomentose, slightly imbricate leaflets with marginal prickles characterize this species. The specific epithet argenteum was chosen to describe the silver appearance of the persistent tomentum covering the new leaves. D. argenteum appears to have affinities with D. purpusii and D. califanoi. (C) 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 141, 471-476 MH - Mexico|Oaxaca MH - Mexico|Veracruz MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000182419500005 L2 - cycad;cycad species complexes;floristic refugia;Mesoamerica SO - Botanical Journal of the Linnean Society 2003 ;141(4):471-476 8211 UI - 7070 AU - Greiner J AU - Klose S AU - Reinsch K AU - Schmid HM AU - Sari R AU - Hartmann DH AU - Kouveliotou C AU - Rau A AU - Palazzi E AU - Straubmeier C AU - Stecklum B AU - Zharikov S AU - Tovmassian G AU - Barnbantner O AU - Ries C AU - Jehin E AU - Henden A AU - Kaas AA AU - Grav T AU - Hjorth J AU - Pedersen H AU - Wijers RAMJ AU - Kaufer A AU - Park HS AU - Williams G AU - Reimer O AD - Max Planck Inst Extraterr Phys, D-85741 Garching, GermanyThuringer Landessternwarte Tautenburg, D-07778 Tautenburg, GermanyUniv Sternwarte Gottingen, D-37083 Gottingen, GermanyETH, Inst Astron, CH-8092 Zurich, SwitzerlandCALTECH, Pasadena, CA 91125, USAClemson Univ, Dept Phys & Astron, Clemson, SC 29634, USANSSTC, Huntsville, AL 35805, USACNR, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, ItalyUniv Cologne, Inst Phys, D-50937 Cologne, GermanyUNAM, Inst Astron, Ensenada 22860, Baja California, MexicoUniv Sternwarte, Wendelstein Observ, D-81679 Munich, GermanyEuropean So Observ, Santiago 19, ChileUSN Observ, Univ Space Res Assoc, Flagstaff, AZ 86002, USANord Opt Telescope, Santa Cruz De La Palma 38700, SpainUniv Oslo, Inst Theoret Astrophys, N-0315 Oslo, NorwayHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Copenhagen, NBIfAFG, Astron Observ, DK-2100 Copenhagen O, DenmarkUniv Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, NetherlandsLawrence Livermore Natl Lab, Livermore, CA 94551, USAUniv Arizona, Multiple Mirror Telescope Observ, Tucson, AZ 85721, USARuhr Univ Bochum, D-44780 Bochum, GermanyGreiner, J, Max Planck Inst Extraterr Phys, D-85741 Garching, Germany TI - Evolution of the polarization of the optical afterglow of the gamma-ray burst GRB030329 AB - The association of a supernova with GRB030329(1,2) strongly supports the 'collapsar' model(3) of gamma-ray bursts, where a relativistic jet(4) forms after the progenitor star collapses. Such jets cannot be spatially resolved because gamma-ray bursts lie at cosmological distances; their existence is instead inferred from 'breaks' in the light curves of the afterglows, and from the theoretical desire to reduce the estimated total energy of the burst by proposing that most of it comes out in narrow beams. Temporal evolution of the polarization of the afterglows(5-7) may provide independent evidence for the jet structure of the relativistic outflow. Small-level polarization (similar to1-3 per cent)(8-17) has been reported for a few bursts, but its temporal evolution has yet to be established. Here we report polarimetric observations of the afterglow of GRB030329. We establish the polarization light curve, detect sustained polarization at the per cent level, and find significant variability. The data imply that the afterglow magnetic field has a small coherence length and is mostly random, probably generated by turbulence, in contrast with the picture arising from the high polarization detected in the prompt gamma-rays from GRB021206 (ref. 18) MH - Chile MH - Denmark MH - Germany MH - Italy MH - Mexico|Baja California MH - Netherlands MH - Norway MH - Spain MH - Switzerland MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 41 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000186517200036 L2 - 29 MARCH 2003; SPECTROPOLARIMETRY; GRB-990510; GRB-020405; GRB-030329; EMISSION SO - Nature 2003 ;426(6963):157-159 8212 UI - 7356 AU - Grether A AU - de Llano A AU - Solis MA AD - UNAM, Fac Ciencias, Mexico City 04510, DF, MexicoUNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoWashington Univ, Dept Phys, St Louis, MO 63130, USAUNAM, Inst Fis, Mexico City 01000, DF, MexicoGrether, A, UNAM, Fac Ciencias, Apdo Postal 70-542, Mexico City 04510, DF, Mexico TI - Anomalous behavior of ideal Fermi gas below two dimensions AB - Normal behavior of the thermodynamic properties of a Fermi gas in d > 2 dimensions, integer or not, means monotonically increasing or decreasing of its specific heat, chemical potential or isothermal sound velocity, all as functions of temperature. However, for 0 < d < 2 dimensions these properties develop a "hump" (or "trough") which increases (or deepens) as d --> 0. Though not the phase transition signaled by the sharp features ("cusp" or "jump") in those properties for the ideal Bose gas in d > 2 (known as the Bose-Einstein condensation), it is nevertheless an intriguing structural anomaly which we exhibit in detail MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000185642300008 SO - European Physical Journal D 2003 ;25(3):287-291 8213 UI - 7812 AU - Griffis M AU - Rico JM AD - Eigenpoint Co, High Springs, FL 32655, USAInst Tecnol Celaya, Dept INgn Mecan, Guanajuato 38010, MexicoGriffis, M, Eigenpoint Co, POB 1708, High Springs, FL 32655, USA TI - The nut in screw theory AB - This study in projective geometry reveals that the principle of duality applies to the screw. Here, the screw is demonstrated to be an element of a projective three-dimensional space (P-3), right alongside the line. Dual elements for the screw and line are also revealed (the nut and spline). Reciprocity is demonstrated for a pair of screws, and incidence is demonstrated for screw and its dual element. Reciprocity and incidence are invariant for projective transformations of P3, but only incidence is invariant for the more general linear transformations of screws. This latter transformation is analogous to a projective transformation of a projective five-dimensional space (P-5), which is shown to induce a contact transformation of the original P-3, where some points lying on a Kummer surface are directly mapped. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Guanajuato MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Robotics U5 - J;Article AV - English IS - 0741-2223 UR - ISI:000184482700004 L2 - GEOMETRY; SYSTEMS SO - Journal of Robotic Systems 2003 ;20(8):437-476 8214 UI - 9443 AU - Grimalsky V AU - Koshevaya S AU - Tecpoyotl-Torres M AU - Moroz I AU - Kishenko Y AU - Escobedo-Alatorre J AD - Autonomous State Univ Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoT Schevchenko Kiev Natl Univ, Radiophys Fac, UA-03127 Kiev, UkraineGrimalsky, V, Autonomous State Univ Morelos, CIICAp, Av Univ No 1001, Cuernavaca 62210, Morelos, Mexico TI - Terahertz p-i-n modulator AB - Theoretical and experimental research of silicon surface oriented integrated p-i-n-struetures as quasi-optical modulators of terahertz frequency range have been done. The problem of double injection into i-region has been numerically solved. A possible role of nonlinearity in boundary conditions at injecting junctions is pointed out. Our simulations demonstrate that an effective modulation of terahertz wave beams by Si p-i-n-structures can be achieved up till the frequencies 2-2.5 THz. Measurements at 400 GHz confirm the results of simulations. The possibility of modulation of picosecond monopulses is also investigated. The investigation of modulator includes the analysis of the nonlinear losses, which are very important in sub millimeter waves. The field value of the nonlinear effects domination is obtained MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 0195-9271 UR - ISI:000180185800005 L2 - p-i-n diodes;quasioptical modulators SO - International Journal of Infrared and Millimeter Waves 2003 ;24(2):189-200 8215 UI - 8868 AU - Grimalsky VV AU - Hayakawa M AU - Ivchenko VN AU - Rapoport YG AU - Zadorozhnii VI AD - Shevchenko Univ, Kiev Natl Taras, Phys Fac, Kiev 22, UkraineNatl Inst Astrophys Opt & Elect, Puebla, MexicoUniv Electrocommun, Chofu, Tokyo 1828585, JapanWestern Montana Coll, Dillon, MT 59725, USARapoport, YG, Shevchenko Univ, Kiev Natl Taras, Phys Fac, Prosp Glushkov 6, Kiev 22, Ukraine TI - Penetration of an electrostatic field from the lithosphere into the ionosphere and its effect on the D-region before earthquakes AB - The penetration of an electrostatic field, from a source located in the lithosphere into the ionosphere is investigated. The electrostatic problem is solved numerically for a medium with an inhomogeneous anisotropic conductivity coupled to an "effective upper boundary condition". The results show that the electric field in the ionosphere D-layer can effectively change the parameters of the lower ionosphere. The kinetics in the D-region are considered along with calculations of the atmospheric conductivity at an altitude of 60 km. It is concluded that (i) the atmospheric conductivity at 60 km can change by 30-70% as a result of electrostatic perturbations, created before the onset of earthquakes, and (ii) the penetration of an electrostatic field from th e lithosphere into the ionosphere above 60 km is much better at night-time than during the day. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Puebla MH - Ukraine MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 32 U4 - Geochemistry & Geophysics;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1364-6826 UR - ISI:000181699200001 L2 - atmosphere;earthquake;electrostatic field;upper boundary condition;photochemistry dynamics;electromagnetic waves;earth-ionosphere waveguide;THUNDERCLOUD FIELDS; KOBE EARTHQUAKE; ATMOSPHERE SO - Journal of Atmospheric and Solar-Terrestrial Physics 2003 ;65(4):391-407 8216 UI - 6629 AU - Grimanelli D AU - Garcia M AU - Kaszas E AU - Perotti E AU - Leblanc O AD - CIMMYT, Dept Appl Biotechnol, IRD, Mexico City 06600, DF, MexicoCIMMYT, Int Maize & Wheat Improvement Ctr, IRD, Mexico City 06600, DF, MexicoSyngenta Biotechnol, Res Triangle Pk, NC 27709, USAGrimanelli, D, CIMMYT, Dept Appl Biotechnol, IRD, APDO 6-641, Mexico City 06600, DF, Mexico TI - Heterochronic expression of sexual reproductive programs during apomictic development in tripsacum AB - Some angiosperms reproduce by apomixis, a natural way of cloning through seeds. Apomictic plants bypass both meiosis and egg cell fertilization, producing progeny that are genetic replicas of the mother plant. In this report, we analyze reproductive development in Tripsacum dactyloides, an apomictic relative of maize, and in experimental apomictic hybrids between maize and Tripsacum. We show that apomictic reproduction is characterized by an alteration of developmental timing of both sporogenesis and early embryo development. The absence of female meiosis in apomictic Tripsacum results from an early termination of female meiosis. Similarily, parthenogenetic development of a maternal embryo in apomicts results from precocious induction of early embryogenesis events. We also show that male meiosis in apomicts is characterized by comparable asynchronous expression of developmental stages. Apomixis thus results in an array of possible phenotypes, including wild-type sexual development. Overall, our observations suggest that apomixis in Tripsacum is a heterochronic phenotype; i.e., it relies on a deregulation of the timing of reproductive events, rather than on the alteration of a specific component of the reproductive pathway MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: GENETICS RP - NOT IN FILE U3 - TC 16 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6731 UR - ISI:000187459100046 L2 - SEED DEVELOPMENT; APOMIXIS; MAIZE; MEIOSIS; POLYEMBRYONY; ARABIDOPSIS; DACTYLOIDES; BEHAVIOR; POACEAE SO - Genetics 2003 ;165(3):1521-1531 8217 UI - 7766 AU - Grudsky S AU - Karapetyants A AU - Vasilevski N AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoRostov Don State Univ, Dept Math, Rostov Na Donu 344711, RussiaGrudsky, S, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Toeplitz operators on the unit ball in C-n with radial symbols AB - The paper is devoted to the study of Toeplitz operators with radial symbols on the weighted Bergman spaces on the unit ball in C-n. Admitting "badly" behaved unbounded symbols we get new qualitative features. In particular, contrary to known results, a Toeplitz operator with the same (unbounded) symbol now can be bounded in one weighted Bergman space and unbounded in another, compact in one weighted Bergman space and bounded but not compact in another, compact in one weighted Bergman space and unbounded in another. In our case of radial symbols, the Wick (or covariant) symbol of a Toeplitz operator gives complete information about the operator, providing its spectral decomposition MH - Mexico|Distrito Federal MH - Russia PB - BUCHAREST: THETA FOUNDATION RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0379-4024 UR - ISI:000184621700007 L2 - weighted Bergman space;Toeplitz operators;BERGMAN SPACES SO - Journal of Operator Theory 2003 ;49(2):325-346 8218 UI - 8019 AU - Gu XY AU - Ma ZQ AU - Dong SH AD - China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R ChinaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoGu, XY, China Ctr Adv Sci & Technol, World Lab, POB 8730, Beijing 100080, Peoples R China TI - Levinson theorem for the Dirac equation in D+1 dimensions AB - In terms of the generalized Sturm-Liouville theorem, the Levinson theorem for the Dirac equation with a spherically symmetric potential in D+1 dimensions is uniformly established as a relation between the total number of bound states and the sum of the phase shifts of the scattering states at E=+/-M with a given angular momentum. The critical case, where the Dirac equation has a half bound state, is analyzed in detail. A half bound state is a zero-momentum solution if its wave function is finite but does not decay fast enough at infinity to be square integrable MH - Mexico|Distrito Federal MH - Peoples R China PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000183915200073 L2 - ENERGY WAVE-FUNCTIONS; SCHRODINGER-EQUATION; SCATTERING SYSTEMS; THRESHOLD BEHAVIOR; NODAL STRUCTURE; PHASE-SHIFTS; POTENTIALS; PARTICLES; SPECTRUM SO - Physical Review A 2003 ;67(6): 8219 UI - 6873 AU - Guarner J AU - de Leon-Bojorge B AU - Lopez-Corella E AU - Ferebee-Harris T AU - Gooding L AU - Garnett CT AU - Shieh WJ AU - Dawson J AU - Erdman D AU - Zaki SR AD - Ctr Dis Control & Prevent, Div Viral & Rickettsial Dis, Resp & Enter Virus Branch, Atlanta, GA 30333, USANatl Inst Pediat, Dept Pathol, Mexico City, DF, MexicoEmory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322, USAGuarner, J, Ctr Dis Control & Prevent, Div Viral & Rickettsial Dis, Resp & Enter Virus Branch, 1600 Clifton Rd,Mailstop G32, Atlanta, GA 30333 USA TI - Intestinal intussusception associated with adenovirus infection in Mexican children AB - Formalin-fixed intestinal tissue specimens from 12 Mexican pediatric patients with intussusception were examined for the presence of adenovirus. Four patients (33%) had detectable adenovirus antigen in epithelial cells as determined by using immunohistochemical analysis. Two of the patients with positive immunohistochemical results had antigens in dendritic and mononuclear inflammatory cells, and 3 patients had positive results for species C adenovirus by in situ hybridization using adenovirus species-specific probes (A-F). A real-time polymerase chain reaction assay specific for species C (nonenteric) adenoviruses was used to confirm immunohistochemical results and to amplify adenovirus DNA for sequencing. A sequence similar to that for adenovirus serotype I was found in I patient, serotype 2 in another, and serotype 6 in a third; in the fourth patient, the sequence was indeterminate between serotypes 2 and 6 The assays used in this study proved useful for the identification of species C adenoviruses in formalin-fixed specimens from Mexican pediatric patients with intussusception MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: AMER SOC CLINICAL PATHOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Pathology U5 - J;Article AV - English IS - 0002-9173 UR - ISI:000186829600007 L2 - adenovirus;intussusception;Mexico;immunohistochemistry;in situ hybridization;PCR;polymerase chain reaction;INTRANUCLEAR INCLUSIONS; VIRAL ETIOLOGY; VIRUS WATCH; APPENDIXES; CHILDHOOD; INFANTS; ILLNESS SO - American Journal of Clinical Pathology 2003 ;120(6):845-850 8220 UI - 9239 AU - Guarner J AU - Herrera-Goepfert R AU - Mohar A AU - Smith C AU - Schofield A AU - Halperin D AU - Sanchez L AU - Parsonnet J AD - Ctr Dis Control & Prevent, Atlanta, GA 30333, USAInst Nacl Cancerol, Mexico City, DF, MexicoUniv Autonoma Mexico, Inst Invest Biomed, Mexico City, DF, MexicoColegio Frontera Sur, Chiapas, MexicoStanford Univ, Sch Med, Stanford, CA 94305, USAGuarner, J, Ctr Dis Control & Prevent, Mail Stop G32,1600 Clifton Rd NE, Atlanta, GA 30333 USA TI - Diagnostic yield of gastric biopsy specimens when screening for preneoplastic lesions AB - The Sydney system recommends sites and numbers of stomach biopsies (mapping) for evaluation of Helicobacter pylori-associated lesions. The diagnostic yield of the recommended mapping technique in populations at high risk for gastric preneoplastic lesions has not been established. We evaluated pathology data from 733 endoscopies performed as part of an intervention study that assessed the effects of H. pylori treatment on preneoplastic conditions. Two pathologists assessed whether the mapping sequence of the 7 biopsy specimens obtained during each endoscopy was correctly followed and graded the specimens using the Sydney classification for gastritis. If the mapping sequence was followed, then we evaluated whether the amount of information obtained from 3 biopsy samples approximated that obtained from 5 and 7 biopsy samples. The mapping sequence was followed in only 239 (33%) endoscopies, indicating that experienced endoscopists can inadvertently misidentify sites in the stomach when obtaining specimens. When data from 7 specimens were used, H. pylori was found in 205 endoscopies, atrophy in 152, metaplasia in 135, and dysplasia in 22. When data from 3 specimens were used, the sensitivity was 99% for presence of H. pylori, 82% for atrophy and metaplasia, and 81% for dysplasia. When data from 5 specimens were used, the sensitivity was 100% for H. pylori, 96% for atrophy, and 95% for metaplasia and dysplasia. Although site-specific biopsy mapping is difficult in practice, the recommendations of the Sydney system as to the location and number of gastric biopsy specimens can adequately identify significant gastric histopathology MH - USA MH - Mexico|Chiapas MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 5 U4 - Pathology U5 - J;Article AV - English IS - 0046-8177 UR - ISI:000180732200005 L2 - gastric biopsy;preneoplasia;screening;diagnosis;HELICOBACTER-PYLORI INFECTION; INTESTINAL METAPLASIA; SYDNEY SYSTEM; CLASSIFICATION; COLONIZATION; ASSOCIATION; CHIAPAS; MEXICO; ULCER SO - Human Pathology 2003 ;34(1):28-31 8221 UI - 7960 AU - Gubreev GM AU - Tarasenko AA AD - S Ukrainian State Pedag Univ, Odessa, UkraineUniv Autonoma Estado Hidalgo Pachuca, Hidalgo, MexicoGubreev, GM, S Ukrainian State Pedag Univ, Odessa, Ukraine TI - Represent ability of de Branges matrices as Blaschke-Potapov products and completeness of some families of functions AB - Criteria for the representability of meromorphic second-order matrix functions J-expanding in the upper half-plane (de Branges matrices) as left, right, and two-sided Blaschke-Potapov products are stated. Results on the spectral structure of operators whose characteristic matrix functions are de Branges matrices are obtained MH - Mexico|Hidalgo MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0001-4346 UR - ISI:000183962500024 SO - Mathematical Notes 2003 ;73(5-6):796-801 8222 UI - 7496 AU - Guerkov REM AU - Targoni OS AU - Kreher CR AU - Boehm BO AU - Herrera MT AU - Tary-Lehmann M AU - Lehmann PV AU - Schwander SK AD - Case Western Reserve Univ, Sch Med, Dept Pathol, Cleveland, OH 44106, USAUniv Hosp Ulm, Endocrinol Sect, D-89081 Ulm, GermanyInst Nacl Enfermedades Respiratorias, Dept Microbiol, Mexico City, DF, MexicoUniv Med & Dent New Jersey, New Jersey Med Sch, Dept Med, Newark, NJ 07103, USALehmann, PV, Case Western Reserve Univ, Sch Med, Dept Pathol, BRB 929,10900 Euclid Ave, Cleveland, OH 44106 USA TI - Detection of low-frequency antigen-specific IL-10-producing CD4(+) T cells via ELISPOT in PBMC: cognate vs. nonspecific production of the cytokine AB - Single-cell resolution cytokine ELISPOT assays are increasingly used to gain insights into clonal sizes of type 1 and type 2 effector T cell populations in vivo. However, ELISPOT assays permitting monitoring of regulatory IL-10-producing T cells have so far not been established. Unlike IFN-gamma, IL-2, IL-4, and IL-5 assays performed on PBMC in which the recall antigen-induced cytokine spots are T cell-derived, we show here that in such assays IL-10 is primarily monocyte-derived. T cell-derived IL-10 spots were 80 x 10(3) mum(2) in size, seven times larger than spots produced by monocytes, and B cells produced even smaller spots. Based on spot size gating and the use of B cells as APC, we have established test conditions that permit measurement of cognate IL-10 production by low-frequency antigen-specific T cells. IL-10-producing PPD-specific CD4(+) T cells were detected in frequencies comparable to IFN-gamma-secreting CD4(+) T cells in tuberculosis patients, but not in uninfected healthy control individuals. In contrast, IL-10-secreting CD4(+) T cells specific for a panel of recall antigens could not be detected in frequencies >1/100,000 in healthy individuals whose CD4(+) cells responded to these antigens with type 1 or type 2 cytokine production in the 1:100,000-1:1000 frequency range. Therefore, the induction of IL-10-producing T cells seems to be under tighter control than that of Th1/Th2 cells, apparently confined to states of chronic immune stimulation. Access to low-frequency immune monitoring of IL-10-producing T cells will provide new insights into the role of regulatory T cells in health and disease. (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Biochemical Research Methods;Immunology U5 - J;Article AV - English IS - 0022-1759 UR - ISI:000185381300010 L2 - T lymphocytes;cytokines;suppression;bacterial infections;memory;GROWTH-FACTOR-BETA; IFN-GAMMA; IN-VIVO; TUBERCULOSIS PATIENTS; PRESENTING CELLS; IL-10; INTERLEUKIN-10; SECRETION; RESPONSES; TOLERANCE SO - Journal of Immunological Methods 2003 ;279(1-2):111-121 8223 UI - 6882 AU - Guerrero-Carbajal C AU - Edwards AA AU - Lloyd DC AD - Municipio Ocoyoacan, Inst Nacl Invest Nucl, Salazar 52045, MexicoNatl Radiol Protect Board, Didcot OX11 0RQ, Oxon, EnglandLloyd, DC, Municipio Ocoyoacan, Inst Nacl Invest Nucl, Km 36 5 Carretera Mexico Toluca, Salazar 52045, Mexico TI - Induction of chromosome aberration in human lymphocytes and its dependence on X ray energy AB - The variations of dose response with X ray energy observed with the human lymphocyte dicentric assay is examined. In order to determine reliably the initial slopes (RBEm) many cells need to be analysed at low doses. Insufficient analysis may explain some reported interlaboratory differences in fitted dose-response coefficients. One such discrepancy at 150 kV(p), E = 70 keV is examined. Data are also presented for an X ray spectrum of 80 kV(p), E = 58 keV. Over the photon energy range 20 keV X rays to 1.25 MeV gamma rays RBEm varies by about a factor of 5, with the lower energies being more effective. This is consistent with microdosimetric theory. By contrast. in radiological protection a radiation weighting factor of 1.0 is assumed for all photons when assessing the risk of inducing cancer at low doses. The measured variations of biological effect with photon energy have led to suggestions that the lower energies, as used for some diagnostic radiology, carry a greater risk per unit dose than is normally assumed by those involved in radiological protection. Interpretation of the data reported in this paper does not support this view MH - United Kingdom MH - Mexico|Estado De Mexico PB - ASHFORD: NUCLEAR TECHNOLOGY PUBL RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000186703600004 L2 - RADIATION; RBE SO - Radiation Protection Dosimetry 2003 ;106(2):131-135 8224 UI - 5339 AU - Guerrero-Tortolero DA AU - Porter MJR AU - Bromage NR AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandCtr Invest Biol Noroeste SC La Paz, La Paz, BCS, MexicoUniv Tasmania, Sch Aquaculture, Hobart, Tas 7001, AustraliaGuerrero-Tortolero, DA, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - The effects of different daytime light intensities on the diel patterns of plasma melatonin in fingerling and broodstock rainbow trout (Oncorhynchus mykiss) AB - Diel plasma melatonin levels were measured to determine the effects of varied light intensities in juvenile and adult rainbow trout. This study showed that night-time melatonin plasma concentrations were significantly higher (P< 0.05) in juveniles (600 &PLUSMN; 75 pg/mL to 492 &PLUSMN; 29 pg/mL) than broodstock (314 &PLUSMN; 83 pg/mL to 265 &PLUSMN; 55 pg/mL) at 1250 lux. Light intensities of 700 lux were unresponsive in both groups. This amplitudinal difference between juvenile and adult fishes response to light may suggest a developmental importance of melatonin MH - Australia MH - Mexico|Baja California Sur MH - United Kingdom PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Fisheries;Physiology U5 - J;Article AV - English IS - 0920-1742 UR - ISI:000221880400147 SO - Fish Physiology and Biochemistry 2003 ;28(1-4):415-416 8225 UI - 8269 AU - Guerrero-Zarraga C AU - Nava-Campo AA AD - Hosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoHosp Sick Children, Toronto, ON M5G 1X8, CanadaGuerrero-Zarraga, C, Hosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, Mexico TI - Antibiotic prescribing for CAP in Mexico MH - Canada MH - Mexico|Distrito Federal PB - LEAWOOD: SOC TEACHERS FAMILY MEDICINE RP - NOT IN FILE U3 - TC 1 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0742-3225 UR - ISI:000183404700002 L2 - CHILDREN SO - Family Medicine 2003 ;35(6):387-387 8226 UI - 8033 AU - Guerrero VM AU - Pena D AD - ITAM, Dept Estadist, Mexico City 01000, DF, MexicoUniv Carlos III Madrid, Dept Estadist & Econometria, Madrid, Spain TI - Combining multiple time series predictors: a useful inferential procedure AB - We present a general result that allows us to combine data from two different sources of information in order to improve the efficiency of predictors within the context of multiple time series analysis. Such a result is derived from generalized least squares and is given as a combining rule that takes into account the possibility of correlation between forecasts and bias in one of them. We then specialize that result to situations in which the predictors are unbiased and uncorrelated. Afterwards we propose measuring precision shares and testing for compatibility in order for the combination to make sense. Several applications of the combining rule are presented according to the nature of the linear constraints imposed by one of the data sources. When the constraints are binding we consider the case of restricted forecasts with exact linear restrictions, deterministic changes in the model structure and partial information on some variables. When the constraints are stochastic we study forecast combinations that include expert judgments and benchmarking. Thus, the connections among different standard techniques are emphasized by the combining rule and its companion compatibility test. An empirical example illustrates the usefulness of this inferential procedure in practice. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0378-3758 UR - ISI:000183922200014 L2 - benchmarking;compatibility testing;forecast combination;generalized least squares;restricted prediction;EXTRA-MODEL INFORMATION; ARIMA FORECASTS; BENCHMARKING; COMBINATION; RESTRICTIONS; ADJUSTMENT; ERRORS SO - Journal of Statistical Planning and Inference 2003 ;116(1):249-276 8227 UI - 7210 AU - Guevara J AU - Llois AM AU - guilera-Granja F AU - Montejano-Carrizales JM AD - Univ San Martin, Escuela Ciencia & Tecnol, RA-1651 San Martin, ArgentinaCNEA, CAC, Dept Fis, RA-1650 San Martin, ArgentinaUBA, FCEyN, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoGuevara, J, Univ San Martin, Escuela Ciencia & Tecnol, Alem 3901, RA-1651 San Martin, Argentina TI - Magnetism of small Mn clusters AB - The role of structure on the magnetic properties of Mn clusters is investigated by performing calculations for different growth families, icosahedral, bcc and fcc. The spin-polarized electronic properties of these geometries are calculated by solving an spd tight-binding Hubbard-like Hamiltonian in the unrestricted Hartree-Fock approximation by using a bulk-like parametrization, extra orbitals of s-like character being added to take into account spillover effects present in transition metal clusters. Conclusions about the possible structure of these clusters as a function of size are drawn by comparison with recent experimental results. We find that for small clusters the preferred structure is mainly icosahedral while for larger sizes (N greater than or equal to 30) the bcc structure begins to compete with the icosahedral one. The magnetic coupling within the clusters is non-ferromagnetic. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Argentina MH - Mexico|San Luis Potosi PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000186026400026 L2 - TRANSITION-METAL CLUSTERS; NICKEL CLUSTERS; NI CLUSTERS; MOMENTS; MANGANESE; IRON; BULK SO - Physica Status Solidi B-Basic Research 2003 ;239(2):457-462 8228 UI - 7678 AU - Guibal E AU - Guzman J AU - Navarro R AU - Revilla J AD - Ecole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, FranceUniv Guanajuato, Inst Invest Cient, Guanajuato, MexicoCtr Invest & Desarollo, Grp Girsa, Toluca, Edo De Mexico, MexicoGuibal, E, Ecole Mines Ales, Lab Genie Environm Ind, 6 Ave Clavieres, F-30319 Ales, France TI - Vanadium extraction from fly ash - Preliminary study of leaching, solvent extraction, and sorption on chitosan AB - Fly ashes resulting from the combustion of fuel containing high concentrations of vanadium that can be slightly removed by water and more efficiently by alkaline or acid solutions. This uncontrolled release can contaminate water sources and requires appropriate storage of fly ashes. This study investigated the possibility of cleaning the ashes by leaching the material and recovering vanadium by solvent extraction (for metal concentration solutions higher than 200 mg V L-1) using several amine extractants (Primene JM-T, Amberlite LA-2, Alamine 336, and Alamine 304), a quaternary ammonium salt (Aliquat 336), and by a sorption process (for low-metal concentration solutions) using chitosan. Extraction and stripping were investigated with liquid extractants and showed that Aliquat 336 was the best of these extractants. However, since Aliquat 336 exhibits a greater difficulty at stripping, secondary or tertiary amine extractants appear more suited for the extraction process. Vanadium sorption occurs on chitosan through anion exchange with a maximum sorption capacity of 400 to 450 mg V g(-1) at pH 3. The treatment of acid leachates with chitosan does not appear possible, since it requires a pH control to pH 3, which precipitates ferric ions and coprecipitates vanadium. Alternative routes could be the alkaline leaching of fly ashes and a further pH control MH - France MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0149-6395 UR - ISI:000184714300016 L2 - vanadium;fly ash;leaching;amine extractants;solvent extraction;chitosan sorption;COAL; EQUILIBRIUM; COMBUSTION; BEADS; WOOD; PEAT; OIL SO - Separation Science and Technology 2003 ;38(12-13):2881-2899 8229 UI - 7581 AU - Guijarro JI AU - M'Barek S AU - Gomez-Lagunas F AU - Garnier D AU - Rochat H AU - Sabatier JM AU - Possani LD AU - Delepierre M AD - Inst Pasteur, Unite RMN Biomol, CNRS URA 2185, Dept Biol Struct & Chim, F-75724 Paris 15, FranceFac Med Nord, Biochim Lab, CNRS UMR 6560, F-13916 Marseille, FranceFac Med Nord, Lab Int Associe Ingn Biomol, F-13916 Marseille 20, FranceNatl Autonomous Univ Mexico, Dept Physiol, Sch Med, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Dept Mol Med & Bioproc, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoDelepierre, M, Inst Pasteur, Unite RMN Biomol, CNRS URA 2185, Dept Biol Struct & Chim, 28 Rue Dr Roux, F-75724 Paris 15, France TI - Solution structure of Pi4, a short four-disulfide-bridged scorpion toxin specific of potassium channels AB - Pi4 is a short toxin found at very low abundance in the venom of Pandinus imperator scorpions. It is a potent blocker of K+ channels. Like the other members of the alpha-KTX6 subfamily to which it belongs, it is cross-linked by four disulfide bonds. The synthetic analog (sPi4) and the natural toxin (nPi4) have been obtained by solid-phase synthesis or from scorpion venom, respectively. Analysis of two-dimensional H-1 NMR spectra of nPi4 and sPi4 indicates that both peptides have the same structure. Moreover, electrophysiological recordings of the blocking of Shaker B K+ channels by sPi4 (K-D = 8.5 nM) indicate that sPi4 has the same blocking activity of riPi4 (K-D = 8-0 nM), previously described. The disulfide bonds have been independently determined by NMR and structure calculations, and by Edman-degradation/mass-spectrometry identification of peptides obtained by proteolysis of nPi4. Both approaches indicate that the pairing of the half-cystines is C-6-C-27, C-12-C-32, C-16-C-34, and C-22-C-37. The structure of the toxin has been determined by using 705 constraints derived from NMR data on sPi4. The structure, which is well defined, shows the characteristic alpha/beta scaffold of scorpion toxins. It is compared to the structure of the other alpha-KTX6 subfamily members and, in particular, to the structure of maurotoxin, which shows a different pattern of disulfide bridges despite its high degree of sequence identity (76%) with Pi4. The structure of Pi4 and the high amounts of synthetic peptide available, will enable the detailed analysis of the interaction of Pi4 with K+ channels MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - WOODBURY: COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0961-8368 UR - ISI:000184976100004 L2 - cysteine-stabilized alpha beta motif;disulfide bridges;NMR;Pandinus imperator;potassium channel;scorpion toxin;AMBIGUOUS DISTANCE RESTRAINTS; SHAKER K+ CHANNEL; NANO-NMR PROBE; PANDINUS-IMPERATOR; DISULFIDE BRIDGE; PROTEIN STRUCTURES; AUTOMATED ASSIGNMENT; CHEMICAL-SYNTHESIS; BLOCKING TOXIN; HIGH-AFFINITY SO - Protein Science 2003 ;12(9):1844-1854 8230 UI - 7543 AU - guilar-Hernandez J AU - Cardenas-Garcia M AU - Contreras-Puente G AU - Vidal-Larramendi J AD - UPALM, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoAguilar-Hernandez, J, Univ La Habana, IMRE, Fac Fis, Havana 10400, Cuba TI - Analysis of the 1.55 eV PL band of CdTe polycrystalline films AB - Photoluminescence (PL) spectra of CdTe at low temperatures usually show a narrow band at 1.55 eV, sometimes together with phonon replicas. It has been shown that this band is associated with a transition involving an acceptor level due to a cadmium vacancy; however, there is discrepancy about the high-energy level which causes this transition. It is assumed that this high-energy level comes from the bottom of the conduction band or arises from non-excited level due to a superficial donor. In order to clarify the origin of this level, we have carried out selective pair luminescence (SPL) studies at 10 K and also analyzed the temperature dependence of PL in CdTe polycrystalline samples. Our results allowed us to conclude that the 1.55 eV PL band arises from the overlap of two bands peaking at 1.550 and 1.556 eV, respectively. The first one is associated with a donor-acceptor pair transition and the second one (1.556 eV) is probably due to a transition involving excitons bound to a superficial acceptor of the type Cu-i(+)-V-Cd(-). (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000185174800040 L2 - photoluminescence;selective pair luminescence;photovoltaic devices;PHOTOLUMINESCENCE; IDENTIFICATION; EDGE SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2003 ;102(1-3):203-206 8231 UI - 8560 AU - guilar-Hernandez J AU - Contreras-Puente G AU - Vidal-Larramendi J AU - Vigil-Galan O AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoAguilar-Hernandez, J, Univ La Habana, Fac Fis, IMRE, Havana 43100, Cuba TI - Influence of the growth conditions on the photoluminescence spectrum of CdTe polycrystalline films deposited by the close space vapor transport technique AB - A study of the influence of some growth parameters, the gradient of temperature between source and substrate and introduction of oxygen in the growth chamber, on the optical properties of CdTe thin films grown by Close Space Vapor Transport (CSVT) is presented. This study was carried out by means of photoluminescence (PL). The combined effect of the temperature gradient and oxygen in the growth chamber on the crystalline quality of CdTe thin films were analyzed. Important changes in the photoluminescence spectra were observed. A decrease of the intensity of the excitonic PL band is observed, as oxygen concentration increases. This accounts for an increase in the defect density due to the presence of oxygen. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000182535100017 L2 - CdTe thin films;close space vapor transport;photoluminescence;growth conditions;THIN-FILMS; CELLS SO - Thin Solid Films 2003 ;426(1-2):132-134 8232 UI - 9066 AU - guilar-Hernandez J AU - Contreras-Puente G AU - Morales-Acevedo A AU - Vigil-Galan O AU - Cruz-Gandarilla F AU - Vidal-Larramendi J AU - Escamilla-Esquivel A AU - Hernandez-Contreras H AU - Hesiquio-Garduno M AU - rias-Carbajal A AU - Chavarria-Castaneda M AU - rriaga-Mejia G AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Ingn Elect, SEES, Mexico City, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaUniv La Habana, Fac Quim, IMRE, Dept Quim Inorgan, Havana 10400, CubaAguilar-Hernandez, J, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Photoluminescence and structural properties of cadmium sulphide thin films grown by different techniques AB - In this paper, we present a comparative study of photoluminescence and its relation to the structural properties of cadmium sulphide (CdS) thin films grown by chemical bath deposition (CBD), close spaced vapour transport, laser ablation (LA) and sputtering. Taking into account that the physical properties of US thin films depend upon the growth technique and the optimization of the deposition conditions for each technique, we show that the best crystal perfection occurs for LA-CdS films since the main photoluminescence peak at low temperature is due to bound excitons (2.53 eV). As expected, the films with the worst crystalline quality are those grown by CBD, ascertained by the photoluminescence band around 1.72 eV due to sulfur vacancies ('red band') without the corresponding exciton band. The photoluminescence results are correlated to x-ray diffraction measurements that confirm the above results MH - Cuba MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000181119400010 L2 - MAGNETIC-FIELD; LASER-ABLATION; CDS; SUBSTRATE SO - Semiconductor Science and Technology 2003 ;18(2):111-114 8233 UI - 5601 AU - guilar-Madrid G AU - Juarez-Perez CA AU - Markowitz S AU - Hernandez-Avila M AU - Roman FRS AU - Grameix JHV AD - Inst Mexicano Seguro Social, Area Calificac & Evaluac Enfermedades Trabajo, Ctr Med Nacl Siglo XXI, Col Doctores 62508, DF, MexicoCUNY, Ctr Biol Nat Syst, Queens Coll, New York, NY 10021, USAMt Sinai Sch Med, New York, NY, USAInst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca, Morelos, MexicoInst Nacl Salud Publ, Direcc Informat & Geog Med, Cuernavaca, Morelos, MexicoAguilar-Madrid, G, Inst Mexicano Seguro Social, Area Calificac & Evaluac Enfermedades Trabajo, Ctr Med Nacl Siglo XXI, Av Cuauhtemoc 330, Col Doctores 62508, DF, Mexico TI - Globalization and the transfer of hazardous industry: Asbestos in Mexico, 1979-2000 AB - This study quantified asbestos use in Mexico in the past decade and evaluated available data on mortality due to malignant mesothelioma in Mexico between 1979 and 2000. Mortality data were analyzed from secondary databases of the Mexican Social Security System and the Ministry of Health. Data on the import and export of asbestos in Mexico were obtained from the Ministry of Trade and Industrial Development of Mexico. Deaths due to pleural mesothelioma significantly increased in this period. Although the import of asbestos declined, the number of Mexican products that contain asbestos tripled. Export of Mexican asbestos-containing products to Central America grew rapidly in the last ten years of the study. Mexico continues the appreciable use of asbestos and has experienced a significant increase in the occurrence of the sentinel asbestos-related disease, malignant mesothelioma. Given the many limitations to the control of hazardous work exposures in Mexico, a ban on asbestos is advocated as the most feasible means of limiting an epidemic of asbestos-related disease MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BURLINGTON: ABEL PUBLICATION SERVICES RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1077-3525 UR - ISI:000221161700012 L2 - mortality;pleural mesothelioma;asbestos;imports;exports;Mexico;MESOTHELIOMA; EXPOSURE; MORTALITY; TRENDS SO - International Journal of Occupational and Environmental Health 2003 ;9(3):272-279 8234 UI - 7348 AU - guilera-Navarro VC AU - Fortes M AU - de Llano M AD - UNICENTRO, Dept Fis, BR-85015 Guarapuava, PR, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoAguilera-Navarro, VC, UNICENTRO, Dept Fis, BR-85015 Guarapuava, PR, Brazil TI - Cooper pairing and ladder correlations in a BCS ground state AB - A Bethe-Salpeter treatment of Cooper pairs (CPs) based on an ideal Fermi gas (IFG) "sea" produces unstable CPs if holes are not ignored. Stable CPs with damping emerge when the BCS ground state replaces the IFG, and are positive-energy, finite-lifetime resonances for nonzero center-of-mass momentum with a linear dispersion leading term. Bose-Einstein condensation of such pairs may thus occur in exactly two dimensions as it cannot with quadratic dispersion MH - Brazil MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9792 UR - ISI:000185634600015 L2 - SUPERCONDUCTIVITY SO - International Journal of Modern Physics B 2003 ;17(18-20):3304-3309 8235 UI - 7288 AU - Guinovart-Diaz R AU - Rodriguez-Ramos R AU - Bravo-Castillero J AU - Sabina FJ AD - Univ La Habana, Fac Matemat & Computac, Havana 10400, CubaUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Delegacion de Alvaro Obr, DF, MexicoRodriguez-Ramos, R, Univ La Habana, Fac Matemat & Computac, Habana 4, Havana 10400, Cuba TI - Modeling of three-phase fibrous composite using the asymptotic homogenization method AB - A three-phase concentric fiber-reinforced periodic composite is considered wherein the constituents exhibit piezoelectric properties. The cross-section of the periodic cell is a regular hexagon with two concentric circles and the periodicity is the same in two directions at an angle pi/3. Simple closed-form expressions are obtained for the effective properties of this composite by means of the asymptotic homogenization method. Numerical computations have been done. The analytical solution of the required resulting plane- and antiplane-strain local problems, which turns out to be only two, makes use of potential methods of a complex variable and properties of Weierstrass elliptic and related functions of periods (1,0) and (cos pi/3, sin pi/3). Benveniste's universal type of relations for this composite are satisfied. Comparison with other models is shown MH - Cuba MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Mechanics;Materials Science, Characterization & Testing;Materials Science, Composites U5 - J;Article AV - English IS - 1537-6532 UR - ISI:000185768900003 L2 - TRANSVERSELY ISOTROPIC CONSTITUENTS; FIBER-REINFORCED COMPOSITE; CLOSED-FORM EXPRESSIONS; PIEZOELECTRIC COMPOSITES; EFFECTIVE COEFFICIENTS; HEXAGONAL SYMMETRY; SQUARE SYMMETRY; MICROMECHANICS; INTERPHASE; PIEZOCOMPOSITE SO - Mechanics of Advanced Materials and Structures 2003 ;10(4):319-333 8236 UI - 7718 AU - Guirado-Lopez R AU - Villasenor-Gonzalez P AU - Dorantes-Davila J AU - Pastor GM AD - Univ Automoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Toulouse 3, Phys Quant Lab, F-31062 Toulouse, FranceGuirado-Lopez, R, Univ Automoma San Luis Potosi, Inst Fis, San Luis Potosi, Mexico TI - Orbital magnetic moments and magnetic anisotropy energy in Rh-N and CoNPdM clusters AB - The orbital magnetic moments and the magnetic anisotropy energy (MAE) of Rh-N (N less than or equal to 55) and Co19PdM (M = 24 and 60) are determined by using a self-consistent real-space tight-binding method. For Rh-N, amounts typically 20-50% of the total magnetic moment M-z = 2 + . Strong oscillations as a function of N are observed with a rapid convergence to zero as the spin magnetization vanishes for N similar or equal to 40-50. In Co19PdM clusters, the magnetization per Co atom is remarkably larger than in pare Co-19. This is mainly due to the local spin moments induced at the I'd atoms, which amount to about 20% of the spin moment per Co atom [2(Pd) = (0.1-0.3)mu(B)]. Large orbital moments are found at the Co atoms, particularly at the Co/Pd interface. The anisotropy of and the associated MAE's are analyzed from a local perspective MH - France MH - Mexico|San Luis Potosi PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000184687800017 L2 - RHODIUM CLUSTERS; METAL-CLUSTERS SO - European Physical Journal D 2003 ;24(1-3):73-76 8237 UI - 8238 AU - Guirado-Lopez RA AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Toulouse 3, Phys Quant Lab, Ctr Natl Rech Sci, F-31062 Toulouse, FranceGuirado-Lopez, RA, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, Mexico TI - Orbital magnetism in transition-metal clusters: From Hund's rules to bulk quenching AB - The local and average orbital moments of transition-metal (TM) clusters are determined bridging the gap between atomic Hund's rules and solid-state quenching. A remarkable enhancement of is revealed in agreement with recent measurements. In small Ni-N (Nless than or equal to10), represents (20-40)% of the total magnetization and is therefore crucial for the comparison between theory and experiment. Larger clusters (Ngreater than or equal to150) show nearly bulklike quenching at the interior but retain a considerable surface enhancement. Trends for different TM's are discussed MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 34 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000183381200028 L2 - NICKEL CLUSTERS; CO; MOMENTS; NANOCLUSTERS; ANISOTROPY; SURFACE; FE SO - Physical Review Letters 2003 ;90(22): 8238 UI - 8500 AU - Gumen L AU - Feldman E AU - Yurchenko V AU - Krokhin A AU - Pereyra P AD - Univ Popular Autonoma Estado Puebla, Puebla 72160, MexicoDonetsk Engn Phys Inst, UA-340114 Donetsk, UkraineUniv Autonoma Puebla, Puebla 72570, MexicoUniv Autonoma Metropolitana, Mexico City 02200, DF, MexicoGumen, L, Univ Popular Autonoma Estado Puebla, Puebla 72160, Mexico TI - Topological defects in 1D potential and superlattices AB - We study the energy spectrum of ID periodic potential with a topological defect, i.e. the defect that breaks globally the translational symmetry. The topological defect appears by matching two identical periodic potentials at a point where the derivative is different from zero. At the defect the derivative (the force) suffers a discontinuous jump. The amplitude of the jump characterizes the strength of the defect. We show that topological defects may give rise to two localized states within the energy gaps. This situation is different from point defects that lead to a single discrete level in every gap. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000182700700094 L2 - lattice defect;periodic structure;localized states SO - Physica E-Low-Dimensional Systems & Nanostructures 2003 ;17(1-4):264-265 8239 UI - 6990 AU - Guo XP AU - Hernandez-Lerma O AD - Zhongshan Univ, Sch Math & Computat Sci, Guangzhou 510275, Peoples R ChinaIPN, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoGuo, XP, Zhongshan Univ, Sch Math & Computat Sci, Guangzhou 510275, Peoples R China TI - Continuous-time controlled Markov chains with discounted rewards AB - This paper studies denumerable state continuous-time controlled Markov chains with the discounted reward criterion and a Borel action space. The reward and transition rates are unbounded, and the reward rates are allowed to take positive or negative values. First, we present new conditions for a nonhomogeneous Q(t)-process to be regular. Then, using these conditions, we give a new set of mild hypotheses that ensure the existence of epsilon-optimal (epsilon greater than or equal to 0) stationary policies. We also present a 'martingale characterization' of an optimal stationary policy. Our results are illustrated with controlled birth and death processes MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000186608200002 L2 - continuous-time controlled Markov chains;unbounded reward and transition rates;discounted criterion;optimal stationary policies;martingale characterization;CONTROLLED QUEUING-SYSTEMS; DECISION-PROCESSES; COUNTABLE STATE; BIAS OPTIMALITY; TRANSITION; CRITERION; BIRTH; RATES; SPACE SO - Acta Applicandae Mathematicae 2003 ;79(3):195-216 8240 UI - 8198 AU - Guo XP AU - Hernandez-Lerma O AD - Zhongshan Univ, Sch Math & Computat Sci, Guangzhou 510275, Peoples R ChinaInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoGuo, XP, Zhongshan Univ, Sch Math & Computat Sci, Guangzhou 510275, Peoples R China TI - Zero-sum games for continuous-time Markov chains with unbounded transition and average payoff rates AB - This paper is a first study of two-person zero-sum games for denumerable continuous-time Markov chains determined by given transition rates, with an average payoff criterion. The transition rates are allowed to be unbounded, and the payoff rates may have neither upper nor lower bounds. In the spirit of the 'drift and monotonicity' conditions for continuous-time Markov processes, we give conditions on the controlled system's primitive data under which the existence of the value of the game and a pair of strong optimal stationary strategies is ensured by using the Shapley equations. Also, we present a 'martingale characterization' of a pair of strong optimal stationary strategies. Our results are illustrated with a binh-and-death game MH - Mexico|Distrito Federal MH - Peoples R China PB - SHEFFIELD: APPLIED PROBABILITY TRUST RP - NOT IN FILE U3 - TC 5 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0021-9002 UR - ISI:000183496000004 L2 - zero-sum game;controlled Q-process;average payoff criterion;pairs of optimal stationary strategies;martingale characterization;STOCHASTIC DIFFERENTIAL-GAMES; METRIC STATE-SPACE; CRITERION; OPTIMALITY SO - Journal of Applied Probability 2003 ;40(2):327-345 8241 UI - 9109 AU - Guo XP AU - Hernandez-Lerma O AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Math, Mexico City 07000, DF, MexicoZhongshan Univ, Sch Math & Computat Sci, Guangzhou 510275, Peoples R ChinaGuo, XP, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Math, Mexico City 07000, DF, Mexico TI - Drift and monotonicity conditions for continuous-time controlled Markov chains with an average criterion AB - In this paper, we give conditions for the existence of average optimal policies for continuous-time controlled Markov chains with a denumerable state-space and Borel action sets. The' transition rates are allowed to be unbounded, and the reward/cost rates may have neither upper nor lower bounds. In the spirit of the "drift and monotonicity" conditions-for continuous-time Markov processes, we propose a new set of conditions on the controlled process' primitive data under which the existence of optimal (deterministic) stationary policies in the class of randomized Markov policies is.proved using the extended generator approach instead of Kolmogorov's forward equation used in the previous literature, and.under which the convergence of a policy iteration method is also shown. Moreover, we use a controlled queueing system to show that all of our conditions are satisfied, whereas those in the previous literature fail to hold MH - Mexico|Distrito Federal MH - Peoples R China PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 15 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000181099700005 L2 - average (or ergodic) reward/cost criterion;continuous-time controlled Markov chains (or continuous-time Markov decision processes);drift and monotonicity conditions;optimal stationary policy;unbounded transition and reward/cost rates SO - Ieee Transactions on Automatic Control 2003 ;48(2):236-245 8242 UI - 9315 AU - Guo XP AU - Hernandez-Lerma O AD - Zhongshan Univ, Dept Stat Sci, Guangzhou 510275, Peoples R ChinaIPN, CINVESTAV, Dept Math, Mexico City 0700, DF, MexicoGuo, XP, Zhongshan Univ, Dept Stat Sci, Guangzhou 510275, Peoples R China TI - Continuous-time controlled Markov chains AB - This paper concerns studies on continuous-time controlled Markov chains, that is, continuous-time Markov decision processes with a denumerable state space, with respect to the discounted cost criterion. The cost and transition rates are allowed to be unbounded and the action set is a Borel space. We first study control problems in the class of deterministic stationary policies and give very weak conditions under which the existence of epsilon-optimal (epsilon greater than or equal to 0) policies is proved using the construction of a minimum Q-process. Then we further consider control problems in the class of randomized Markov policies for (1) regular and (2) nonregular Q-processes. To study case (1), first we present a new necessary and sufficient condition for a nonhomogeneous Q-process to be regular. This regularity condition, together with the extended generator of a nonhomogeneous Markov process, is used to prove the existence of epsilon-optimal stationary policies. Our results for case (1) are illustrated by a Schlogl model with a controlled diffusion. For case (2), we obtain a similar result using Kolmogorov's forward equation for the minimum Q-process and we also present an example in which our assumptions are satisfied, but those used in the previous literature fail to hold MH - Mexico|Distrito Federal MH - Peoples R China PB - BEACHWOOD: INST MATHEMATICAL STATISTICS RP - NOT IN FILE U3 - TC 9 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1050-5164 UR - ISI:000180727200011 L2 - nonhomogeneous continuous-time Markov chains;controlled Q-processes;unbounded cost and transition rates;discounted criterion;optimal stationary policies;BIAS OPTIMALITY SO - Annals of Applied Probability 2003 ;13(1):363-388 8243 UI - 9367 AU - Gurevich Y AU - Logvinov G AU - Lashkevich I AD - IPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoInst Politecn Nacl, Secc Estudios Posgrad & Invest, ESIME Culhuacan, Culhuacan 04430, DF, MexicoTernopil State Med Acad, UA-46001 Ternopol, UkraineGurevich, Y, IPN, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07300, DF, Mexico TI - Boundary conditions in theory of photothermal processes in solids AB - In this work general boundary conditions are obtained for the linear nonstationary heat diffusion equation. It is shown that both surface heat conduction and surface heat accumulation must be taken into account for the validity of energy balance at the surface. The latter process is important at fast temperature variation in time. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000180451900087 SO - Review of Scientific Instruments 2003 ;74(1):589-591 8244 UI - 7721 AU - Gurin VS AU - Petranovskii VP AU - Pestryakov AN AU - Kryazhov A AU - Ozhereliev O AU - Hernandes MA AU - Alexeenko AA AD - Belarussian State Univ, Physicochem Res Inst, Minsk 220050, ByelarusUNAM, CCMC, Ensenada, Baja California, MexicoFritz Haber Inst, Dept Inorgan Chem, D-1000 Berlin, GermanyTomsk Polytech Univ, Tomsk, RussiaUniv Autonoma Puebla, Inst Sci, Puebla 72570, MexicoGomel State Tech, Gomel, ByelarusGurin, VS, Belarussian State Univ, Physicochem Res Inst, Minsk 220050, Byelarus TI - Copper clusters and small particles stabilized within nanoporous materials AB - Copper was incorporated into mordenites with variable SiO2/Al2O3 molar ratio, porous silica xerogels, natural pumice, and gamma-alumina. The UV/Visible spectroscopy of the copper species produced as the result of hydrogen reduction and catalytic runs is presented. Different spectral features were detected assignable to nanoparticles few-atomic clusters, oxide forms and Cu(II) compounds. The significant effect of support upon the redox-behavior of copper is discussed on the basis of experimental data MH - Byelarus MH - Germany MH - Mexico|Baja California MH - Mexico|Puebla MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000184687800089 L2 - SUPPORTED COPPER; OXIDATION; CATALYSTS SO - European Physical Journal D 2003 ;24(1-3):381-384 8245 UI - 8328 AU - Gurin VS AU - Kovalenko DL AU - Petranovskii VP AU - Bogdanchikova NE AD - BSU, Physicochem Res Inst, Minsk, ByelarusGomel State Univ, Adv Mat Res Lab, Gomel 246699, ByelarusUNAM, CCMC, Ensenada, Baja California, MexicoGurin, VS, BSU, Physicochem Res Inst, Minsk, Byelarus TI - Copper nanoparticles within amorphous and crystalline dielectric matrices AB - Two approaches are considered for synthesis of Cu nanoparticles within amorphous and crystalline matrices, which allow fabrication of "nanoparticies-in-dielectric" nanocomposites. The first one is based on the sol-gel technique producing dielectric silica films with copper nanoparticles. The particles provide an optical response of the composite material due to the plasmon resonance band. In the second approach the nanoparticles are produced within the crystalline zeolite matrices, which are able to stabilize both the few-atomic clusters and the nanoparticles. This optically active crystalline material is now introduced into a sol-gel matrix to produce transparent films. (C) 2003 Kluwer Academic Publishers MH - Byelarus MH - Mexico|Baja California PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0957-4522 UR - ISI:000183126900018 L2 - SIO2/AL2O3 MOLAR RATIO; OPTICAL-PROPERTIES; SILVER CLUSTERS; ZEOLITE-X; PARTICLES; ABSORPTION; GLASSES; METAL; SIZE SO - Journal of Materials Science-Materials in Electronics 2003 ;14(5-7):333-336 8246 UI - 9277 AU - Gurin VS AU - Petranovskii VP AU - Bogdanchikova NE AD - Belarussian State Univ, Physicochem Res Inst, Minsk 220080, ByelarusUNAM, CCMC, Ensenada, Baja California, MexicoGurin, VS, Belarussian State Univ, Physicochem Res Inst, Leningradskaja St 14, Minsk 220080, Byelarus TI - Silver and copper nanostructures within the erionite regular lattice: interplay between intra- and extra-crystalline location AB - In the two metal-zeolite systems (Ag-crionite and Cu-erionite), we demonstrate the optical features of metal species incorporated. These two systems are very different in the optical appearance, but rather similar in X-ray diffraction (XRD) patterns of the reduced forms. Ag-8 clusters within the regular intra-crystalline erionite voids provide the pronounced absorption peaks in UV, other species are associated with the silver nanoparticles ordered in the erionite matrix. In the case of copper, the plasmon resonance band is developed by the metal nanoparticles. No any additional ordering was observed for copper-erionite samples. (C) 2002 Elsevier Science B.V All rights reserved MH - Byelarus MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000180600800016 L2 - silver and copper nanostructures;erionite regular lattice;intra- and extra-crystalline location;CLUSTERS; ZEOLITES SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2003 ;23(1-2):81-85 8247 UI - 7002 AU - Gurney AL AU - Grimanelli D AU - Kanampiu F AU - Hoisington D AU - Scholes JD AU - Press MC AD - Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandCIMMYT, Appl Biotechnol Ctr, Mexico City 06600, DF, MexicoCIMMYT, Nairobi, KenyaGurney, AL, Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England TI - Novel sources of resistance to Striga hermonthica in Tripsacum dactyloides, a wild relative of maize AB - The parasitic weed Striga hermonthica lowers cereal yield in small-holder farms in Africa. Complete resistance in maize to S. hermonthica infection has not been identified. A valuable source of resistance to S. hermonthica may lie in the genetic potential of wild germplasm. The susceptibility of a wild relative of maize, Tripsacum dactyloides and a Zea mays-T. dactyloides hybrid to S. hermonthica infection was determined. Striga hermonthica development was arrested after attachment to T. dactyloides. Vascular continuity was established between parasite and host but there was poor primary haustorial tissue differentiation on T. dactyloides compared with Z. mays. Partial resistance was inherited in the hybrid. Striga hermonthica attached to Z. mays was manipulated such that different secondary haustoria could attach to different hosts. Secondary haustoria formation was inhibited on T. dactyloides, moreover, subsequent haustoria formation on Z. mays was also impaired. Results suggest that T. dactyloides produces a signal that inhibits haustorial development: this signal may be mobile within the parasite haustorial root system MH - United Kingdom MH - Kenya MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Plant Sciences U5 - J;Article AV - English IS - 0028-646X UR - ISI:000186561900013 L2 - Tripsacum dactyloides;Striga hermonthica;parasitic plants;wild relatives;plant resistance;haustorium;PARASITIC ANGIOSPERM; GERMINATION STIMULANT; OROBANCHE-AEGYPTIACA; SORGHUM-BICOLOR; HOST-PLANT; HAUSTORIA; SCROPHULARIACEAE; PHOTOSYNTHESIS; EXPRESSION; CULTIVARS SO - New Phytologist 2003 ;160(3):557-568 8248 UI - 8462 AU - Gutierrez-Aguirre MA AU - Reid JW AU - Suarez-Morales E AD - El Colegio Frontera Sur, ECOSUR, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoVirginia Museum Nat Hist, Martinsville, VA 24112, USASuarez-Morales, E, El Colegio Frontera Sur, ECOSUR, Unidad Chetumal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - An Afro-Asian species of Mesocyclops (Copepoda : Cyclopoida) in Central America and Mexico AB - The presence of populations of the Afro-Asian cyclopoid copepod crustacean Mesocyclops thermocyclopoides Harada, 1931, in southeastern Mexico and in Central America is recorded. This species was recently redescribed in detail from Old World specimens. Because of the rarity of cosmopolitan forms in Mesocyclops, neotropical records of this species were suspected to be undescribed taxa of a widespread species complex. However, it was possible, through an upgraded morphological analysis and taxonomic comparison, to confirm the occurrence of M. thermocyclopoides in the neotropics. The American specimens are described in full. In the Americas, this species seems to be distributed in Mexico and Central America only. This is the third or fourth Asian or African species of the genus that has apparently been introduced into the New World by human agency. The others are M. pehpeiensis, M. ogunnus, and M. aspericornis MH - Mexico|Quintana Roo MH - USA PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000182931500012 L2 - SOUTHEASTERN MEXICO; NORTH-AMERICA; 1914 COPEPODA; CRUSTACEA; GENUS; SARS SO - Journal of Crustacean Biology 2003 ;23(2):352-363 8249 UI - 9273 AU - Gutierrez-Martinez C AU - Mollier P AU - Porte H AU - Zaldivar-Huerta I AU - Carcano-Rivera L AU - Goedgebuer JP AD - INAOE, Lab Microonda, GTM, Puebla 72000, Pue, MexicoGeorgia Tech Lorraine, CNRS, UMR 6603, GTL CNRS TELECOM, F-57070 Metz, FranceGutierrez-Martinez, C, INAOE, Lab Microonda, GTM, Puebla 72000, Pue, Mexico TI - Multi-channel long-distance optical fiber transmission using dispersion-induced microwave transmission windows AB - In this paper, the model and implementation of an optical transmission system using a multi-longitudinal mode optical source and a dispersive optical channel are described. Such a system exhibits multi-bandpass transmission windows, as a result of a combination of the wideband optical spectrum and chromatic dispersion on the optical channel. As shown in this paper, the band-pass windows are centered at frequencies that depend on the spectral free range of the optical source and optical channel length. In the telecommunications domain, band-pass transmission windows can be used for multiplexing analog and/or digital signals, as an alternative way for transmitting baseband and modulated subcarriers, through optical-fiber links. To show such a potential application, the multiplexed transmission of two microwave signals, using two adjacent band-pass windows, is also described in this paper. (C) 2003 Wiley Periodicals, Inc MH - France MH - Mexico|Puebla PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000180752100017 L2 - multi-longitudinal lasers;optical fibers;chromatic dispersion;external modulation;electro-optic modulators;intensity modulation;MODULATORS; GRATINGS; FILTER SO - Microwave and Optical Technology Letters 2003 ;36(3):202-206 8250 UI - 7334 AU - Gutierrez-Puente Y AU - Tari AM AU - Ford RJ AU - Tamez-Guerra R AU - Mercado-Hernandez R AU - Santoyo-Stephano M AU - Lopez-Berestein G AD - Univ Texas, MD Anderson Canc Ctr, Dept Bioimmunotherapy, Immunobiol & Drug Carriers Sect, Houston, TX 77030, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, Monterrey, NL, MexicoUniv Texas, MD Anderson Canc Ctr, Dept Mol Pathol, Houston, TX 77030, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Ciencias Exactas, Monterrey, NL, MexicoLopez-Berestein, G, Univ Texas, MD Anderson Canc Ctr, Dept Bioimmunotherapy, Immunobiol & Drug Carriers Sect, 1515 Holcombe Blvd, Houston, TX 77030 USA TI - Cellular pharmacology of P-ethoxy antisense oligonucleotides targeted to Bcl-2 in a follicular lymphoma cell line AB - A P-ethoxy oligonucleotide (oligo), 20 bases long and specific for the translation initiation site of human Bcl-2 mRNA, was incorporated into liposomes to increase its intracellular delivery. This oligo selectively inhibited Bcl-2 protein expression and induced growth inhibition in t(14;18)-positive transformed follicular lymphoma (FL) cell lines. We studied the inhibitory effects of shorter liposomal P-ethoxy oligos (7, 9, 11 or 15 mer) in order to determine the activity of different oligo chain lengths targeted to the same Bcl-2 mRNA. At 12 muM, all the oligos inhibited the growth of a FL cell line. We compared the 7-mer oligo with the 20-mer oligo. The two oligos inhibited Bcl-2 protein expression similarly: 66% and 60% for the 7- and 20-mer, respectively. The uptake and retention of both oligos were also very similar. Our results indicate that the Bcl-2 inhibitory activity is maintained with P-ethoxy antisense oligos ranging from 7 to 20 bases MH - Mexico|Nuevo Leon MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Oncology;Hematology U5 - J;Article AV - English IS - 1042-8194 UR - ISI:000185612700019 L2 - Bcl-2 antisense;oligonucleotides;follicular lymphoma;cellular pharmacology;liposomes;TISSUE DISTRIBUTION; OLIGODEOXYNUCLEOTIDES; PHARMACOKINETICS; INHIBITION; OLIGODEOXYRIBONUCLEOTIDES; MALIGNANCIES; REPLICATION; TRANSLATION; STABILITY; LIPOSOMES SO - Leukemia & Lymphoma 2003 ;44(11):1979-1985 8251 UI - 7087 AU - Gutierrez-Rios RM AU - Rosenblueth DA AU - Loza JA AU - Huerta AM AU - Glasner JD AU - Blattner FR AU - Collado-Vides J AD - Univ Nacl Autonoma Mexico, Program Computat Genom, Ctr Invest Fijac Nitrogeno, CIFN UNAM, Morelos 62100, MexicoUniv Wisconsin, Genome Ctr, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoCollado-Vides, J, Univ Nacl Autonoma Mexico, Program Computat Genom, Ctr Invest Fijac Nitrogeno, CIFN UNAM, Morelos 62100, Mexico TI - Regulatory network of Escherichia coli: Consistency between literature knowledge and microarray profiles AB - The transcriptional network of Escherichia coli may well be the most complete experimentally characterized network of a single cell. A rule-based approach was built to assess the degree of consistency between whole-genome microarray experiments in different experimental conditions and the accumulated knowledge in the literature compiled in RegulonDB, a data base of transcriptional regulation and operon organization in E coli. We observed a high and statistical significant level of consistency, ranging from 70%-87%. When effector metabolites of regulatory proteins are not considered in the prediction of the active or inactive state of the regulators, consistency falls by LIP to 40%. Similarly, consistency decreases when rules for multiple regulatory interactions are altered or when "on" and "off" entries were assigned randomly. We modified the initial state of regulators and evaluated the propagation of errors in the network that do not correlate linearly with the connectivity of regulators. We interpret this deviation mainly as a result of the existence of redundant regulatory interactions. Consistency evaluation opens a new space of dialogue between theory and experiment, as the consequences of different assumptions can be evaluated and compared MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - WOODBURY: COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT RP - NOT IN FILE U3 - TC 27 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 1088-9051 UR - ISI:000186357000009 L2 - TRANSCRIPTION INITIATION; EXPRESSION; MECHANISM; PROMOTER; K-12; REPRESSOR; PROTEIN; BINDING; DNA; ORGANIZATION SO - Genome Research 2003 ;13(11):2435-2443 8252 UI - 8494 AU - Gutierrez-Rodriguez A AU - Hernandez-Ruiz MA AU - Sampayo OA AD - Univ Autonoma Zacatecas, Fac Fis, Zacatecas 98060, MexicoUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98060, MexicoUniv Mar del Plata, Dept Fis, RA-7600 Mar Del Plata, ArgentinaGutierrez-Rodriguez, A, Univ Autonoma Zacatecas, Fac Fis, Apartado Postal C-580, Zacatecas 98060, Mexico TI - Higgs pair production in the standard model at next generation linear e(+)e(-) colliders AB - We study the Higgs pair production in the standard model of strong and electroweak interactions at future e(+)e(-) collider energies, with the reaction e(+)e(-)-->t (t) over bar HH. We evaluate the total cross section of t (t) over bar HH and calculate the total number of events considering the complete set of Feynman diagrams at the tree level. The numerical computation is done for an energy which is expected to be available at a possible Next Linear e(+)e(-) Collider with a center-of-mass energy 800, 1600 GeV and a luminosity of 1000 fb(-1) MH - Argentina MH - Mexico|Zacatecas PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000182718300056 L2 - BOSON PRODUCTION; COLLISIONS; COUPLINGS; FUSION SO - Physical Review D 2003 ;67(7): 8253 UI - 6364 AU - Gutierrez JCB AU - Damzen MJ AU - Pinto-Robledo VJ AU - Kir'yanov AV AU - Soto-Bernal JJ AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, EnglandCtr Invest Opt, Leon 37150, Gto, MexicoDamzen, MJ, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Prince Consort Rd, London SW7 2BW, England TI - Compact diode-side-pumped Nd : YVO4 laser in grazing-incidence configuration AB - The analysis of compact CW diode-side-pumped grazing-incidence-geometry Nd:YVO4 laser designs is presented. An output power of 5 W (lambda=1064 nm) was produced at 17 W of diode pump (conversion efficiency of 30%) in single transverse TEM00 mode operation at high laser beam quality (M(x)(2)approximate to1.05 and M(y)(2)approximate to1.01). The resonator geometry was analyzed by applying generalized 4x4 matrix modeling of the spatial mode size, including the impact on the laser operation of cavity astigmatism and a thermal lens in the laser slab. The simplicity and compactness of the laser cavities allow their use for technological applications MH - United Kingdom MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 0946-2171 UR - ISI:000188744700002 L2 - SOLID-STATE LASER; ND-YAG LASER; OUTPUT POWER; SLAB; EFFICIENT; CAVITY; RODS SO - Applied Physics B-Lasers and Optics 2003 ;76(1):13-16 8254 UI - 9001 AU - Gutierrez L AU - Franco J AU - Crossa J AU - Abadie T AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Republ Oriental Uruguay, Fac Agron, Montevideo, UruguayCrossa, J, CIMMYT, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Comparing a preliminary racial classification with a numerical classification of the maize landraces of Uruguay AB - Plant genetic diversity is a major component of any agricultural ecosystem. Thus, it is essential to classify genetic resources properly to conserve, evaluate, and enhance germplasm efficiently. In maize (Zea mays L.), many classification systems have been used for delineating maize races. From the 1980s, with the use of computers, numerical taxonomy became increasingly important and multivariate methods began to be used for classifying genetic resources. The objective of this study was to compare two methods of classification of Uruguayan maize landraces: (i) a preliminary racial classification obtained through visual assessment and (ii) a numerical classification. The numerical classification was conducted by means of a two-stage classification strategy: first, initial groups were formed by the Ward method and, next, the Modified Location Model (MLM) refined those groups. This classification was compared with the preliminary racial classification by four criteria. The Ward-MLM strategy generated more homogeneous groups than those corresponding to the preliminary racial classification. The numerical classification maintained the structure of the more differentiated races, but divided the Cateto Sulino race into two more homogeneous groups, each with smaller variance and more differentiated than other groups. Numerical classification produced groups with clearly distinct characteristics, in terms of the numerical variables, and better, in terms of the four criteria used, than those formed on the basis of racial classification. These results will be the basis for an improved racial classification of maize landraces of Uruguay MH - Mexico|Distrito Federal MH - Uruguay PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181479700036 L2 - CLASSIFYING GENETIC-RESOURCES; ACCESSIONS; VARIABLES; STRATEGY SO - Crop Science 2003 ;43(2):718-727 8255 UI - 9247 AU - Gutierrez L AU - Zurita M AU - Kennison JA AU - Vazquez M AD - UNAM, Inst Biotecnol, Dept Fisiol Mol & Genet Desarrollo, Cuernavaca 62250, Morelos, MexicoNICHHD, Genet Mol Lab, NIH, Bethesda, MD 20892, USAVazquez, M, UNAM, Inst Biotecnol, Dept Fisiol Mol & Genet Desarrollo, Cuernavaca 62250, Morelos, Mexico TI - The Drosophila trithorax group gene tonalli (tna) interacts genetically with the Brahma remodeling complex and encodes an SP-RING finger protein AB - The trithorax group genes are required for positive regulation of homeotic gene function. The trithorax group gene brahma encodes a SW12/SNF2 family ATPase that is a catalytic subunit of the Brm chromatin-remodeling complex. We identified the tonalli (tna) gene in Drosophila by genetic interactions with brahma. tna mutations suppress Polycomb phenotypes and tna is required for the proper expressions of the Antennapedia, Ultrabithorax and Sex combs reduced homeotic genes. The tna gene encodes at least two proteins, a large isoform (TnaA) and a short isoform (TnaB). The TnaA protein has an SP-RING Zn finger, conserved in proteins from organisms ranging from yeast to human and thought to be involved in the sumoylation of protein substrates. Besides the SP-RING finger, the TnaA protein also has extended homology with other eukaryotic proteins, including human proteins. We show that tna mutations also interact with mutations in additional subunits of the Brm, complex, with mutations in subunits of the Mediator complex, and with mutations of the SW12/SNF2 family ATPase gene kismet. We propose that Tna is involved in postranslational modification of transcription complexes MH - Mexico|Morelos MH - USA PB - CAMBRIDGE: COMPANY OF BIOLOGISTS LTD RP - NOT IN FILE U3 - TC 13 U4 - Developmental Biology U5 - J;Article AV - English IS - 0950-1991 UR - ISI:000180733900010 L2 - homeotic gene regulation;brahma;trithorax group;sumoylation;chromatin remodeling;SWI/SNF;taranis;tonalli;drosophila melanogaster;DOSAGE-DEPENDENT MODIFIERS; MEDIATOR COMPLEX; TRANSCRIPTIONAL ACTIVATION; SEGMENT IDENTITY; DISC DEVELOPMENT; NUCLEAR-BODIES; TARGET GENES; MELANOGASTER; SUMO; REPRESSION SO - Development 2003 ;130(2):343-354 8256 UI - 8990 AU - Gutierrez N AU - Defeo O AD - CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoUNDECIMAR, Fac Ciencias, Montevideo 11400, UruguayDINARA, Dept Biol Pesquera, Montevideo 11200, UruguayDefeo, O, CINVESTAV, Unidad Merida, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Development of a new scallop Zygochlamys patagonica fishery in Uruguay: latitudinal and bathymetric patterns in biomass and population structure AB - A quantitative fishing survey of the scallop Zygochlamys patagonica was conducted in Uruguayan waters of the southwestem Atlantic Ocean in July 2001. The area surveyed extends between latitudes 35degrees50'S and 36degrees50'S, water depth ranging from 75 to 135 m. Stations were located systematically on parallel transects along the latitudinal gradient at 10-miles intervals and tows were set at every 5 m water depth interval. Stock estimates were obtained using geostatistics (kriging). This model-based approach showed a persistent spatial structure of the scallop population, as denoted by the spherical model fitted to both the whole population and the harvestable stock (individual height > 55 mm). The structure of spatial dependence suggests a latitudinal structured process close to 48 km (total population) and 61 km (harvestable stock). Mean kriged density for the most likely value of gear efficiency (e = 0.35) was 0.0122 and 0.0089 kg m(-2) respectively, whereas global biomass estimated by block kriging were 48 039 and 35 246 t. Further analysis conducted at the bed of highest scallop densities provided additional support to the spatially structured process observed at a macroscale. Sensitivity analysis conducted with gear efficiency (e), revealed consistency of estimates with accepted theory, i.e., density and biomass estimates increased with decreasing e. Most of the life history traits of Z patagonica showed clear large scale patterns: (1) concerning latitude, the highest density patch was found at the middle (36degrees20'S: mean = 0.0279 kg m(-2)) of the surveyed area, whereas the southern border (36degrees50'S: mean = 0.0204 kg m(-2)) had densities 16 times higher than the northern one (35degrees50'S: 0.0013 kg m(-2)). Muscle weight also increased linearly towards higher latitudes, whereas the harvestable stock, mean individual height and maximum height increased asymptotically in the NE-SW direction. Only muscle yield, either as global mean or discriminated by scallop size, significantly increased at the northern end of species distribution. (2) Bathymetric analysis showed a clear maximum density at depths close to 100 m, coinciding with the minimum proportion of harvestable stock, and a consistent inverse relationship between depth and (a) individual height and (b) muscle weight. Guidelines are suggested for fishery planning and development, taking special emphasis on the applicability of spatially explicit management tools. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Yucatan MH - Uruguay PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000181381400003 L2 - scallops;fishery development;stock assessment;Uruguay;DEPLETION SO - Fisheries Research 2003 ;62(1):21-36 8257 UI - 6937 AU - Guyatt G AU - Ferrans C AU - Halyard M AU - Revicki DA AU - Symonds T AU - Varricchio C AU - Alonso J AD - McMaster Univ, Hlth Sci Ctr, Hamilton, ON, CanadaUniv Illinois, Chicago, IL, USAMayo Clin Scottsdale, Scottsdale, AZ, USAMEDTAP Int Inc, Bethesda, MD, USAPfizer Ltd, Sandwich, Kent, EnglandNCI, NIH, Bethesda, MD 20892, USAIMIM IMAS, Inst Municipal Invest Med, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 04510, DF, Mexico TI - What is the value added to the clinician of health-related quality-of-life information from clinical research and using QOL measures in clinical practice? MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0149-2918 UR - ISI:000186519000003 SO - Clinical Therapeutics 2003 ;25():D6-D7 8258 UI - 6827 AU - Guz AN AU - Menshykov OV AU - Zozulya VV AD - Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, UA-03057 Kiev, UkraineCtr Invest Cient Yucatan AC, Merida 97200, Yucatan, MexicoGuz, AN, Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, Nesterov Str 3, UA-03057 Kiev, Ukraine TI - Surface contact of elliptical crack under normally incident tension-compression wave AB - Surface contact interaction of a plane elliptical crack under normally incident tension-compression wave is solved by the method of boundary integral equations. The contact forces and the displacement discontinuity of the crack edges are examined. The dependence of the mode I stress intensity factor on the wave number is studied. The solution is compared with the results obtained for an elliptical crack without allowance for crack edges contact interaction. (C) 2003 Published by Elsevier Ltd MH - Mexico|Yucatan MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0167-8442 UR - ISI:000186833200008 L2 - HYPERSINGULAR INTEGRALS; FRACTURE-MECHANICS; BODIES; ELASTICITY SO - Theoretical and Applied Fracture Mechanics 2003 ;40(3):285-291 8259 UI - 6203 AU - Guzman-Davalos L AU - Mueller GM AU - Cifuentes J AU - Miller AN AU - Santerre A AD - Univ Guadalajara, Dept Bot & Zool, Zapopan 45101, Jalisco, MexicoField Museum Nat Hist, Dept Bot, Chicago, IL 60605, USANatl Autonomous Univ Mexico, Fac Ciencias, Ciudad Universitaria, Mexico City 04510, DF, MexicoUniv Guadalajara, Dept Biol Celular & Mol, Zapopan 45101, Jalisco, MexicoGuzman-Davalos, L, Univ Guadalajara, Dept Bot & Zool, Apartado Postal 1-139, Zapopan 45101, Jalisco, Mexico TI - Traditional infrageneric classification of Gymnopilus is not supported by ribosomal DNA sequence data AB - The traditional classification of Gymnopilus (Agaricales) recognizes two primary groups, Annulati and Gymnopilus, based on the presence or absence of a membranous partial veil. While our analyses of DNA sequence data from the nuclear ribosomal ITS1-5.8S-ITS2 (ITS) gene supports the monophyly of the genus, these traditional subgroups were not recovered. Five well-supported clades within the genus were identified through these analyses: 1) the spectabilis-imperialis group; 2) nevadensis-penetrans group; 3) a clade formed by G. underwoodii, G. validipes and G. cf. flavidellus; 4) aeruginosus-luteofolius group; and 5) lepidotus-subearlei group. Relationships among these subgroups were not resolved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - LAWRENCE: ALLEN PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000188932800016 L2 - agaricales;Annulati;Cortinariaceae;ITS;phylogeny;Strophariaceae;INTERNAL TRANSCRIBED SPACER; GENUS GYMNOPILUS; TAXONOMIC IMPLICATIONS; CORTINARIACEAE; AGARICALES; MEXICO; PHYLOGENY; FUNGI; IDENTIFICATION; AUSTRALIA SO - Mycologia 2003 ;95(6):1204-1214 8260 UI - 7468 AU - Guzman-Duran A AU - Guzman E AU - Pannell KH AU - Lloyd WD AD - Contribut Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv Texas, Hlth Sci Ctr, Houston, TX, USAUniv Texas, Dept Chem, El Paso, TX 79968, USAGuzman-Duran, A, Contribut Ctr Invest Mat Avanzados, Chihuahua 31109, Mexico TI - Synthesis of (E,Z)-5-bromo-1,1-dimethoxy-5-trimethylsilyl-4-pentene, an upper chain allenic prostaglandin building block AB - This work explores the synthetic route to allenic prostaglandins. In a search for more efficient and reliable methods for the introduction of the allene moiety into the side chains of prostaglandins, the synthons, the (E) and (Z) isomers of 1-bromo-5,5-dimethoxy-1-trimethylsilyl-1-pentene (13a) and (13b), have been prepared and converted to R,S-1,1-dimetboxy-6-phenyl-4,5-hexadiene (16), a prostaglandin analog MH - Mexico|Chihuahua MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0039-7911 UR - ISI:000185297600001 L2 - STEREOSELECTIVE SYNTHESES; ORGANOMETALLIC COMPOUNDS; REDUCTION; F2ALPHA; E2 SO - Synthetic Communications 2003 ;33(19):3271-3283 8261 UI - 7707 AU - Guzman-Novoa E AU - Prieto-Merlos D AU - Uribe-Rubio JL AU - Hunt GJ AD - INIFAP, Mexico City 52140, DF, MexicoNatl Autonomous Univ Mexico, Depto Esp Tradicionales Abejas, Fac Med, Mexico City 04510, DF, MexicoPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USAGuzman-Novoa, E, INIFAP, Santa Cruz 29B Fracc, Mexico City 52140, DF, Mexico TI - Relative reliability of four field assays to test defensive behaviour of honey bees (Apis mellifera) AB - Many assays for measuring defensive behaviour of honey bee (Apis mellifera) colonies are reported in the literature, but their reliability in most cases has not been assessed. This study was conducted to determine the reliability and convenience of four field assays: (1) a test to score behavioural traits that differ between defensive and gentle bees (ratings assay), (2) two stinging tests in which a leather patch is presented to the bees above the brood chamber (flag assay), or (3) in a confined space (box assay), and (4) a test to measure the numbers of bees recruited at the hive entrance in response to a chemical stimulus (pheromone assay). Six colonies each of three different bee types known to vary in their defensive responses (European, Africanized, and hybrid) were established and tested with the assays. To determine the reliability of the assays, coefficients of variation (CV) among trials for single colonies were calculated. Additionally, colonies were ranked according to their degree of defensiveness and their rankings compared for each and between the different assays. The mean CV for the ratings assay was 17.0%, vs. 71.8, 90.4, and 67.3% for the flag, box, and pheromone assays, respectively. The pursuing behaviour of the experimental bees was the component of the field assays that best separated gentle and defensive colonies. The mean number of pursuing Africanized bees was > 81 times higher than that of pursuing European bees. No significant interactions between day of test and colony were found. Rankings for all colonies were comparable and similar across all assays, except the box assay. All assays were able to separate gentle from defensive bee types, but the ratings assay was the most reliable, economical and practical MH - Mexico|Distrito Federal MH - USA PB - CARDIFF: INT BEE RESEARCH ASSOC RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0021-8839 UR - ISI:000184773500005 L2 - Apis mellifera;defensive behaviour;assays;reliability;Africanized honey bees;COLONY DEFENSE; GENETIC DOMINANCE; HYMENOPTERA; APIDAE; IDENTIFICATION; QUEENS SO - Journal of Apicultural Research 2003 ;42(3):42-46 8262 UI - 7044 AU - Guzman-Plazola RA AU - Davis RM AU - Marois JJ AD - Colegio Postgrad, Inst Fitosanidad, Texcoco 56230, Estado Mexico, MexicoUniv Calif Davis, Dept Plant Pathol, Davis, CA 95616, USAUniv Florida, N Florida Res & Educ Ctr, Dept Plant Pathol, Quincy, FL 32351, USAGuzman-Plazola, RA, Colegio Postgrad, Inst Fitosanidad, Km 36-5,Carretera Mexico Texcoco, Texcoco 56230, Estado Mexico, Mexico TI - Effects of relative humidity and high temperature on spore germination and development of tomato powdery mildew (Leveillula taurica) AB - The effects of relative humidity (RH) and temperature on tomato powdery mildew (Leveillula taurica) were studied in controlled environments to define conditions that affect disease development in fresh market tomatoes in California. Gradients of RH (20-90%) at constant temperatures (20-30degreesC) were generated in single growth chambers to determine their effect on mildew development on mature tomato plants. Temperatures of 30degreesC and above were deleterious for spore germination, germ tube elongation, and disease development. Lesion growth and rate of disease progress were significantly higher at 20degreesC than at 25degreesC. Low RH levels (20-40%) reduced spore germination and lesion growth, accelerated host tissue death and reduced disease progress. Intermediate RH levels (50-70%) increased spore germination and optimized disease development, provided temperatures were maintained within favorable limits. High RH levels (80-90%) were favorable for spore germination but continued exposure to these conditions led to a limited lesion growth and disease progress. Short daily periods (two or three daily exposures of at least 2h) of high temperatures (35degreesC) suppressed disease development by 70-92%. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0261-2194 UR - ISI:000186415100003 L2 - epidemiology;latent period;analytical models;weighted regression models;DISEASE; PROGRESS; FUNGUS SO - Crop Protection 2003 ;22(10):1157-1168 8263 UI - 7213 AU - Guzman C AU - Gonzalez-Zamorano M AU - Cabrera R AU - Nathanielsz PW AU - Zambrano E AD - NYU, Sch Med, New York, NY, USANatl Inst Med Sci & Nutr, Mexico City, DF, Mexico TI - Perinatal maternal (M) protein restriction (PR) delays the first estrous in female offspring MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000183333800298 SO - Pediatric Research 2003 ;53(6):38A-38A 8264 UI - 7474 AU - Guzman FS AU - Urena-Lopez LA AD - Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, GermanyUniv Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandUniv Guanajuato, Inst Fis, Guanajuato, MexicoGuzman, FS, Max Planck Inst Gravitat Phys, Albert Einstein Inst, Muehlenberg 1, D-14476 Golm, Germany TI - Newtonian collapse of scalar field dark matter AB - In this paper, we develop a Newtonian approach to the collapse of galaxy fluctuations of scalar field dark matter under initial conditions inferred from simple assumptions. The full relativistic system, the so-called Einstein-Klein-Gordon system, is reduced to the Schrodinger-Newton one in the weak-field limit. The scaling symmetries of the SN equations are exploited to track the nonlinear collapse of single scalar matter fluctuations. The results can be applied to both real and complex scalar fields MH - United Kingdom MH - Germany MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185229300056 L2 - TIME PHASE-TRANSITION; GALACTIC HALO; SOLITON STARS; BOSON STARS; OSCILLATONS; EQUATIONS; LIQUID SO - Physical Review D 2003 ;68(2): 8265 UI - 6202 AU - Guzman G AU - Tapia F AU - Ramirez-Guillen F AU - Baroni TJ AU - Lodge DJ AU - Cantrell SA AU - Nieves-Rivera AM AD - Inst Ecol, Xalapa 91000, Veracruz, MexicoSUNY Coll Cortland, Dept Biol Sci, Cortland, NY 13045, USAUSDA, US Forest Serv, Ctr Forest Mycol Res, Luquillo, PR, USAUniv Turabo, Gurabo, PR 00778, USAUniv Puerto Rico, Dept Ciencias Marinas, Mayaguez, PR, USAGuzman, G, Inst Ecol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - New species of Psilocybe in the Caribbean, with an emendation of P. guilartensis AB - Five new species of Psilocybe from the Caribbean are described: P. caribaea, P. egonii, P. subpsilocybioides, P. zapotecoantillarum and P. zapotecocaribaea. All except P. zapotecocaribaea, which is known only from Martinique, are native to Puerto Rico. Psilocybe guilartensis, previously described from Puerto Rico, is the most commonly collected species of Psilocybe in Puerto Rico. New information on morphology is provided for P. guilartensis, and an emendation of the species circumscription is presented MH - Mexico|Veracruz MH - USA PB - LAWRENCE: ALLEN PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000188932800014 L2 - agaricales;antilles;martinique;Puerto Rico;Strophariaceae SO - Mycologia 2003 ;95(6):1171-1180 8266 UI - 8026 AU - Guzman G AU - Hanlin RT AU - White C AD - Inst Ecol, Xalapa 91000, Veracruz, MexicoUniv Georgia, Dept Plant Pathol, Athens, GA 30602, USAGuzman, G, Inst Ecol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Another new Bluing species of Psilocybe from Georgia, USA AB - A new species of Psilocybe from Georgia is described as P. atlantis. The new species belongs to section Mexicana. Species in this section are typically hallucinogenic. This is the second species of Psilocybe reported from Georgia, only P. weilii (section Cordispora) was known previously from the state MH - Mexico|Veracruz MH - USA PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000183957600017 L2 - Agaricales;Strophariaceae;hallucinogenic;fungi SO - Mycotaxon 2003 ;86():179-183 8267 UI - 6849 AU - Guzman J AU - Saucedo I AU - Revilla J AU - Navarro R AU - Guibal E AD - Ecole Mines, Lab Genie Environm Ind, F-30319 Ales, FranceUniv Guanajuato, Inst Invest Cient, Guanajuato 36040, MexicoGuibal, E, Ecole Mines, Lab Genie Environm Ind, 6 Ave Clavieres, F-30319 Ales, France TI - Copper sorption by chitosan in the presence of citrate ions: influence of metal speciation on sorption mechanism and uptake capacities AB - The presence of organic ligands in a solution containing metal ions modifies metal speciation, which in turn changes the sorption mechanism, optimum pH range and maximum sorption capacity. The present work investigates the sorption of copper by chitosan in the presence of citrate at different metal/ligand ratios. Copper uptake in acidic solution takes place through electrostatic attraction between the protonated amine groups of chitosan and anionic copper-citrate complexes (mainly Cu(OH)L2- but also a small fraction of CuL-). Sorption was negligible below pH 3 due to competition from dissociated anionic ligand and counter ions brought about by dissociation of the acid used for pH control. Actually, copper sorption begins to be significant when the fraction of anionic copper-complexes exceeds that of anionic copper-free ligand. So sorption capacity strongly increases up to pH 4.5-5.5. Above pH 5.5, the progressive decrease of amine protonation leads to a linear decrease in sorption capacity. An excess of ligand leads to an increase in the fraction of free dissociated (anionic) ligand that may compete for electrostatic attraction on protonated amine groups and therefore leads to a decrease in sorption capacities. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0141-8130 UR - ISI:000186835800009 L2 - chitosan;copper;citrate;metal speciation;pH effect;sorption isotherms;electrostatic attraction;chelation;polymer protonation;CROSS-LINKED CHITOSAN; MOLYBDATE SORPTION; URANYL IONS; PHYSICOCHEMICAL PARAMETERS; POLYMER PROPERTIES; PLATINUM SORPTION; AQUEOUS-SOLUTIONS; ADSORPTION; BEADS; EQUILIBRIUM SO - International Journal of Biological Macromolecules 2003 ;33(1-3):57-65 8268 UI - 8735 AU - Gwaze DP AU - Zhou Y AU - Reyes-Valdes MH AU - Al-Rababah MA AU - Williams CG AD - Texas A&M Univ, Fac Genet, College Stn, TX 77843, USAUniv Autonoma Agr Antonio Narro, Dept Fitomejoramiento, Saltillo 25315, Coahuila, MexicoWilliams, CG, Texas A&M Univ, Fac Genet, TAMU 2135, College Stn, TX 77843 USA TI - Haplotypic QTL mapping in an outbred pedigree AB - An offspring genome can be viewed as a mosaic of chromosomal segments or haplotypes contributed by multiple founders in any quantitative trait locus (QTL) detection study but tracing these is especially complex to achieve for outbred pedigrees. QTL haplotypes can be traced from offspring back to individual founders in outbred pedigrees by combining founder-origin probabilities with fully informative flanking markers. This haplotypic method was illustrated for QTL detection using a three-generation pedigree for a woody perennial plant, Pinus taeda L. Growth rate was estimated using height measurements from ages 2 to 10 years. Using simulated and actual datasets, power of the experimental design was shown to be efficient for detecting QTLs of large effect. Using interval mapping and fully informative markers, a large QTL accounting for 11.3 % of the phenotypic variance in the growth rate was detected. This same QTL was expressed at all ages for height, accounting for 7.9-12.2 % of the phenotypic variance. A mixed-model inheritance was more appropriate for describing genetic architecture of growth curves in P. taeda than a strictly polygenic model. The positive QTL haplotype was traced from the offspring to its contributing founder, GP(3), then the haplotypic phase for GP(3) was determined by assaying haploid megagametophytes. The positive QTL haplotype was a recombinant haplotype contributed by GP(3). This study illustrates the combined power of fully informative flanking markers and founder origin probabilities for (1) estimating QTL haplotype magnitude, (2) tracing founder origin and (3) determining haplotypic transmission frequency MH - USA MH - Mexico|Coahuila PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6723 UR - ISI:000182269400006 L2 - QUANTITATIVE TRAIT LOCI; FLANKING MARKERS; GENETIC-ANALYSIS; LOBLOLLY-PINE; LINE CROSSES; MODEL; GROWTH; LINKAGE; SELECTION; CURVES SO - Genetical Research 2003 ;81(1):43-50 8269 UI - 8280 AU - Gyulzadyan MV AU - Stepanian JA AU - Petrosian AR AU - Kunth D AU - McLean B AU - Comte G AD - VA Ambartsumian Byurakan Astrophys Observ, Byurakan, ArmeniaUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoInst Astrophys, F-75014 Paris, FranceSpace Telescope Sci Inst, Baltimore, MD 21218, USAObserv Marseille, F-13248 Marseille, FranceGyulzadyan, MV, VA Ambartsumian Byurakan Astrophys Observ, Byurakan, Armenia TI - Spectroscopic study of a large sample of galaxies discovered in the Second Byurakan Survey fields AB - The Second Byurakan Survey (SBS) is a well-known combined survey, which uses the presence of UV-excess radiation in the continuum, or the presence of emission lines in the spectra for the identification of active and star-forming galaxies. This paper reports on a comparative study of 77 galaxies identified with UV-excess, and 34 galaxies identified via emission-line techniques in the fields of the SBS. The spectroscopic parameters used for the comparison are the [OII] lambda3727/Hbeta and [OIII] lambdaH5007/Hbeta emission-line ratios, the equivalent widths of [OII]lambda3727, [OIII]lambda5007 and Hbeta emission lines, and the C-[OII]-C-Hbeta index. Spectroscopic parameters as well as new redshifts were determined from the spectra obtained with the 6m telescope of the Special Astrophysical Observatory ( Russia). The main results are: 1) Galaxies discovered via UV-excess technique are preferably more active. 2) Galaxies discovered via emission-line technique are preferably high-excitation low-luminosity star-forming galaxies. 3) UV-excess galaxies with the faintest UV-excess radiation are likely candidates to be LINER or Sy2 type objects MH - Armenia MH - France MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0571-7256 UR - ISI:000183328900001 L2 - galaxies : UV-excess galaxies : emission;line galaxies : statistics;EMISSION-LINE GALAXIES; STAR-FORMING GALAXIES; NORTHERN SKY SURVEY; H-II-REGIONS; DWARF GALAXIES; CLASSIFICATION; ABUNDANCES; SUPERNOVAE; TELESCOPE; SPECTRA SO - Astrophysics 2003 ;46(2):131-143 8270 UI - 7775 AU - Hadden J AU - Verastegui E AU - Barrera JL AU - Kurman M AU - Meneses A AU - Zinser JW AU - de la Garza J AU - Hadden E AD - Immuno Rx Inc, New York, NY, USANatl Inst Cancerol, INCAN, Mexico City, DF, MexicoHadden, J, 428 Harbor Rd, Cold Spring Harbor, NY 11724, USA TI - A trial of IRX-2 in patients with squamous cell carcinomas of the head and neck AB - A Phase 11 trial in 42 patients with squamous cell cancer of the head and neck (H&NSCC) was performed using a combination immunotherapy with 10-20 days of perilymphatic injections of a natural cytokine mixture (NCM: IRX-2; 200 units IL-2 equivalence) preceded by low dose cyclophosphamide (CY; 300 mg/m(2)) and followed by daily oral indomethacin (25 me t.i.d.) and zinc (65 mg in a multivitamin preparation). Thirty-nine patients underwent subsequent surgical resection and 22 stage IV patients received additional radiotherapy. Forty-two percent were adjudged to have complete and partial clinical responses (>50% tumor reduction); an additional five patients had minor responses for a total of 58%. Comparison of post-treatment biopsies or surgical specimens showed 90% of patients had reduction in tumor area from 79% to 48% (over half of which was fragmented) and increased area of leukocyte infiltration from 9% to 32% (79% of which was lymphoid). The treatment with IRX-2 was not associated with significant side effects and 24 of patients showed improvement in eating, breathing or phonation or reduced pain and bleeding. Fifteen patients with lymphocytopenia (lymphocyte counts [LC] less than or equal to 1500 mm(3)) showed significant increases in LC, CD3+, CD4+ and CD8+ T lymphocytes of 401, 147, 95 and 100/mm(3), respectively. Analysis of outcome of 32 on protocol patients after 36 months versus 32 concurrent institutional H&NSCC controls showed delayed recurrences and significant increases in mean survival time (MST) and survival (p's<0.02). The data document immunotherapy induced regression of H&NSCC with delayed recurrence and improved mean survival time. (C) 2003 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1567-5769 UR - ISI:000184607100004 L2 - immunotherapy;cancer;immunodeficiency;cytokines;lymph nodes;lymphocytes;immune regression;TREATED AGED MICE; CANCER-IMMUNOTHERAPY; PERILYMPHATIC INTERLEUKIN-2; RECOMBINANT INTERLEUKIN-2; TUMOR-ANTIGENS; ORAL CAVITY; LYMPH-NODES; CYCLOPHOSPHAMIDE; OROPHARYNX; REGRESSION SO - International Immunopharmacology 2003 ;3(8):1073-1081 8271 UI - 8351 AU - Hafsi M AU - Pfeiffer WH AU - Monneveux P AD - CIMMYT, Wheat Project, INRA, Wheat Program, Mexico City 06600, DF, MexicoUniv Ferhat Abbas, Dept Sci Biol, Setif 19000, AlgeriaMonneveux, P, CIMMYT, Wheat Project, INRA, Wheat Program, AP 6-641, Mexico City 06600, DF, Mexico TI - Flag leaf senescence, carbon content and carbon isotope discrimination in durum wheat grown under semi-arid conditions AB - Flag leaf senescence was compared among twenty-one durum wheat genotypes grown under semi-arid conditions in the Algerian High-Plateau using numerical image analysis. A significant correlation was found between senescence at the end of the grain filling period and grain yield. Carbon content of the flag leaf at anthesis (CL) also correlated with grain yield. The association between grain yield and carbon isotope discrimination (Delta) in flag leaves was not significant. A negative correlation between Delta and CL revealed that genotypes with high transpiration efficiency (low Delta) had higher carbon content in the leaves. Results suggest that high flag leaf carbon content at anthesis and low senescence at the end of grain filling are positively associated with grain yield under drought and heat stress MH - Algeria MH - Mexico|Distrito Federal PB - SZEGED: CEREAL RES INST RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0133-3720 UR - ISI:000183156300020 L2 - carbon content;carbon isotope discrimination;durum wheat;image analysis;senescence;LEAVES; YIELD; PHOTOSYNTHESIS; ENVIRONMENTS; EFFICIENCY; STRESS; TRAITS SO - Cereal Research Communications 2003 ;31(1-2):161-168 8272 UI - 8802 AU - Halpern A AU - Mancini MC AU - Suplicy H AU - Zanella MT AU - Repetto G AU - Gross J AU - Jadzinsky M AU - Barranco J AU - Aschner P AU - Ramirez L AU - Matos AG AD - Univ Sao Paulo, Fac Med, Hosp Clin, Sao Paulo, BrazilHosp Clin Curitiba, Curitiba, Parana, BrazilEscola Paulista Med, BR-04023 Sao Paulo, BrazilPontificia Univ Catolica Porto Alegre, Porto Alegre, RS, BrazilHosp Clin Porto Alegre, Porto Alegre, RS, BrazilHosp Durand Unidad Nutr, Buenos Aires, DF, ArgentinaInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoAssoc Colombiana Diabet, Santafe De Bogota, ColombiaInst Costarricence Invest Clin, San Jose, Costa RicaInst Estadual Diabet & Endocrinol, Rio De Janeiro, BrazilHalpern, A, R Romilda Margarida Gabriel 81, BR-04530090 Sao Paulo, Brazil TI - Latin-American trial of orlistat for weight loss and improvement in glycaemic profile in obese diabetic patients AB - Aim: To determine if obese non-insulin-dependent diabetic patients lose more weight when treated for 24 weeks (6 months) with orlistat (120 mg t.i.d.), in conjunction with a hypocaloric diet plus behavioural counselling, than when treated by placebo (t.i.d.) plus similar instructions. The secondary objectives were to evaluate the effects on glucose profile and to determine the tolerability and safety of orlistat. Design: Double-blind, parallel, randomized, placebo-controlled, multicentre study. Subjects: Obese, non-insulin-dependent diabetic patients, aged 18-70 years old, with BMI > 27 kg/m(2) , evaluated at 10 Latin-American centres, in five countries. Efficacy and Tolerability Measurements: After screened, eligible patients passed by a 2-week placebo run-in period receiving a hypocaloric diet. On day 0, patients were randomized to orlistat or placebo for 24 weeks. At each visit, body weight, blood pressure and waist circumference were measured. At the screening visit, baseline visit (week 0), and at weeks 8, 16 and 24, a central laboratory was in charge of measuring fasting glucose and insulin, HbA(1c), postprandial glucose and insulin, fasting total cholesterol, HDL-cholesterol, LDL-cholesterol, triglycerides, and postprandial triglycerides. Other safety laboratory assessments were measured locally at the screening visit, baseline visit and at the end of the study. Adverse events were assessed at each visit from baseline. Results: After 24 weeks of treatment, the orlistat group lost an average of 4.7% of initial body weight vs. 3.0% in the placebo group (p = 0.0003). A greater weight loss was achieved in the orlistat compared with the placebo group (4.24 +/- 0.23 vs. 2.58 +/- 1.46 kg, p = 0.0003). Almost twice as many patients receiving orlistat (30% vs. 17%) lost greater than or equal to 5% of initial body weight (p = 0.003). Orlistat treatment plus diet compared to placebo plus diet was associated with significant improvement in glycaemic control, as reflected in decreases in HbA1c (p = 0.04), fasting plasma glucose (p = 0.036) and postprandial glucose (p = 0.05). Orlistat-treated patients had a mean decrease in glucose levels of 1.00 +/- 0.34 mmol/l [3.7%] vs. 0.01 +/- 0.30 mmol/l for placebo group, at week 24 and an absolute decrease of HbA1c of 0.61 +/- 0.15 vs. a decrease of 0.22 +/- 0.14% in the placebo group. Orlistat therapy also resulted in significantly greater improvements than placebo in lipid profile, with reductions in total cholesterol (p = 0.0001) and LDL-cholesterol (p = 0.002). Mild to moderate transient gastrointestinal events were reported, mainly with orlistat treatment, but their association with withdrawal from the study was low. Conclusion: Orlistat is a useful and an effective therapy in obese diabetic patients, promoting clinically significant weight loss and improved glycaemic control and lipid profile MH - Argentina MH - Brazil MH - Colombia MH - Costa Rica MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 1462-8902 UR - ISI:000182039800006 L2 - orlistat;diabetes;obesity;RISK FACTOR; CARDIOVASCULAR RISK; INSULIN-RESISTANCE; LIPASE INHIBITOR; UNITED-STATES; SERUM-LIPIDS; DOUBLE-BLIND; PREVALENCE; TRENDS; WOMEN SO - Diabetes Obesity & Metabolism 2003 ;5(3):180-188 8273 UI - 6573 AU - Halvorson WL AU - Castellanos AE AU - Murrieta-Saldivar J AD - Univ Arizona, Sonora Desert Field Stn, USGS SW Biol Sci Ctr, Tucson, AZ 85721, USAUniv Sonora, Dept Invest Cient & Tecnol, Hermosillo, Sonora, MexicoSonoran Inst, Tucson, AZ 85715, USAHalvorson, WL, Univ Arizona, Sonora Desert Field Stn, USGS SW Biol Sci Ctr, Tucson, AZ 85721 USA TI - Sustainable land use requires attention to ecological signals AB - This case study details the difficulties of landscape management, highlighting the challenges inherent in managing natural resources when multiple agencies are involved, when the land users have no incentive for conservation, and when government agencies have too few resources for effective management. Pumping of groundwater from the aquifer of La Costa de Hermosillo in the state of Sonora, Mexico, began in 1945 and developed so quickly that by the late 1950s salinity intrusion from the Gulf of California was occurring in the wells. In the 1970s, the irrigatable land in La Costa peaked at 132,516 ha and the extracted volume of water from the aquifer peaked at around 1. 14 billion cubic meters annually. By the 1980s, 105 wells of the total of 498 were contaminated with seawater and, therefore, identified for closure. At present La Costa de Hermosillo still represents 15% of the total harvested land, 16% of the total annual production, and 23% of the gross agricultural production of the state of Sonora. However, there are approximately 80,000 ha of abandoned fields due to salt water intension, lack of water and/or lack of credit available to individual farmers. This unstable situation resulted from the interplay of water management policies and practices, and farm-land policies and practices. While government agencies have been able to enforce better water use for agricultural production, there remains a significant area that requires restoration from its degraded state. For this piece of the ecosystem management puzzle, government agencies have thus far been unable to affect a solution MH - USA MH - Mexico|Sonora PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0364-152X UR - ISI:000187777400003 L2 - sustainable agricultures;salinization;irrigation;groundwater;water management;restoration;Sonora;Mexico SO - Environmental Management 2003 ;32(5):551-558 8274 UI - 7365 AU - Hamann WR AU - Pena M AU - Grafener G AU - Ruiz MT AD - Univ Potsdam, D-14469 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Chile, Dept Astron, Santiago, ChileHamann, WR, Univ Potsdam, Neuen Palais 10, D-14469 Potsdam, Germany TI - The central star of the planetary nebula N 66 in the Large Magellanic Cloud: A detailed analysis of its dramatic evolution 1983-2000 AB - The central star of the planetary nebula N66 (alias WS 35, SMP 83 and HV 5967) in the Large Magellanic Cloud enhanced its brightness dramatically in 1993 and 1994. Within the subsequent four years it returned to the previous level. Its spectrum resembles that of a Wolf-Rayet star of the nitrogen sequence (WN4.5). We monitored the object intensively from ground and with the Hubble Space Telescope. Now we present the complete set of spectroscopic observations from the different epochs before, during and after the brightness outburst of N66. The stellar spectra from the different epochs are analyzed in detail by means of most advanced non-LTE models for expanding stellar atmospheres. The main results are: the luminosity, log L/L-circle dot = 4.6, before and after the outburst is exceptionally high for a central star of a planetary nebula. During the outburst in 1994, it even climbed up to log L/L-circle dot = 5.4 for about one year. The effective temperature of about 112 kK remained roughly constant, i.e. the luminosity mainly increased because of a larger effective stellar radius. The mass loss rate increased from 10(-5.7) M-circle dot yr(-1) in the quiet state to 10(-5.0) M-circle dot yr(-1) during the outburst. The chemical composition of the stellar atmosphere is that of incompletely CNO-processed matter: it is dominated by helium with a rest of hydrogen, nitrogen being slightly enhanced and carbon strongly depleted. We extensively discuss possible scenarios for the nature and evolutionary origin of N66, which should explain the exceptional stellar parameters, the atmospheric composition, the outburst mechanism, and the existence of the bipolar nebula which was ejected only a few thousand years ago and contains about 0.6 solar masses of hydrogen-rich matter. If being a single star, N66 might be (i) a low-mass star after the Asymptotic Giant Branch, as usually adopted for central stars of planetary nebulae, (ii) a massive, i.e. non-degenerate star, or (iii) a merger produced from two white dwarfs. Although there are no direct indications for binarity, we alternatively discuss whether N66 might be (iv) a massive star which lost its hydrogen envelope in a recent common-envelope phase with a less massive companion, or (v) a white dwarf accreting mass from a companion with a high rate. None of the scenarios is free of any contradiction to at least one of the observational facts. However, the binary scenarios pose less severe problems. If N66 is a white dwarf accreting matter in a close-binary system, its present accretion rate would bring it to the Chandrasekhar limit within a few hundred thousand years. Thus N66 might be a candidate for a future type Ia supernova explosion in our cosmic neighborhood MH - Chile MH - Germany MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000185572300024 L2 - stars : winds, outflows;stars : mass-loss;stars : Wolf-Rayet;stars : evolution;planetary nebulae : individual : LMC-N66;HUBBLE-SPACE-TELESCOPE; WOLF-RAYET STARS; SPECTRAL ANALYSES; STELLAR WINDS; WHITE-DWARF; MODELS; LMC; OBJECT; AGB; N66 SO - Astronomy & Astrophysics 2003 ;409(3):969-982 8275 UI - 9185 AU - Hamilton LM AU - Torres-Lozano C AU - Puddicombe SM AU - Richter A AU - Kimber I AU - Dearman RJ AU - Vrugt B AU - Aalbers R AU - Holgate ST AU - Djukanovic R AU - Wilson SJ AU - Davies DE AD - Univ Southampton, Sch Med, Div Infect Inflammat & Repair, Southampton SO9 5NH, Hants, EnglandCUCS UdeG, CMNO IMSS, Mexico City, DF, MexicoSyngenta, Cent Toxicol Lab, Macclesfield, Cheshire, EnglandMartini Hosp, Dept Pathol, Groningen, NetherlandsDavies, DE, Southampton Gen Hosp, Div Infect Inflammat & Repair, Mailpoint 810,Level D Ctr Block, Southampton SO16 6YD, Hants, England TI - The role of the epidermal growth factor receptor in sustaining neutrophil inflammation in severe asthma AB - Background The extent of epithelial injury in asthma is reflected by expression of the epidermal growth factor receptor (EGFR), which is increased in proportion to disease severity and is corticosteroid refractory. Although the EGFR is involved in epithelial growth and differentiation, it is unknown whether it also contributes to the inflammatory response in asthma. Objectives Because severe asthma is characterized by neutrophilic inflammation, we investigated the relationship between EGFR activation and production of IL-8 and macrophage inhibitory protein-1 alpha (MIP-1alpha) using in vitro culture models and examined the association between epithelial expression of IL-8 and EGFR in bronchial biopsies from asthmatic subjects. Methods H292 or primary bronchial epithelial cells were exposed to EGF or H-2 O-2 to achieve ligand-dependent and ligand-independent EGFR activation; IL-8 mRNA was measured by real-time PCR and IL-8 and MIP-1alpha protein measured by enzyme-linked immunosorbent assay (ELISA). Epithelial IL-8 and EGFR expression in bronchial biopsies from asthmatic subjects was examined by immunohistochemistry and quantified by image analysis. Results Using H292 cells, EGF and H-2 O-2 increased IL-8 gene expression and release and this was completely suppressed by the EGFR-selective tyrosine kinase inhibitor, AG1478, but only partially by dexamethasone. MIP-1alpha release was not stimulated by EGF, whereas H-2 O-2 caused a 1.8-fold increase and this was insensitive to AG1478. EGF also significantly stimulated IL-8 release from asthmatic or normal primary epithelial cell cultures established from bronchial brushings. In bronchial biopsies, epithelial IL-8, MIP-1alpha, EGFR and submucosal neutrophils were all significantly increased in severe compared to mild disease and there was a strong correlation between EGFR and IL-8 expression (r = 0.70, P < 0.001). Conclusions These results suggest that in severe asthma, epithelial damage has the potential to contribute to neutrophilic inflammation through enhanced production of IL-8 via EGFR- dependent mechanisms MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 33 U4 - Allergy;Immunology U5 - J;Article AV - English IS - 0954-7894 UR - ISI:000180927400015 L2 - asthma;chemokine;epidermal growth factor;inflammation;neutrophils;tyrosine kinase;BRONCHOALVEOLAR LAVAGE FLUID; NECROSIS-FACTOR-ALPHA; EPITHELIAL-CELLS; BRONCHIAL-MUCOSA; HEALTHY-SUBJECTS; KAPPA-B; LUNG; INTERLEUKIN-8; EXPRESSION; AIRWAYS SO - Clinical and Experimental Allergy 2003 ;33(2):233-240 8276 UI - 9246 AU - Hanley AJG AU - Williams K AU - Gonzalez C AU - D'Agostino RB AU - Wagenknecht LE AU - Stern MP AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, Div Clin Epidemiol, San Antonio, TX 78229, USAMt Sinai Hosp, Leadership Sinai Ctr Diabet, Toronto, ON M5G 1X5, CanadaAmer British Coudray Hosp, Ctr Estudios Diabet, Mexican Social Secur Inst, Div Internal Med,Endocrinol & Metab Serv, Mexico City, DF, MexicoWake Forest Univ, Sch Med, Dept Publ Hlth Sci, Winston Salem, NC 27109, USAHaffner, SM, Univ Texas, Hlth Sci Ctr, Div Clin Epidemiol, 7703 Floyd Curl Dr,Mail Code 7873, San Antonio, TX 78229 USA TI - Prediction of type 2 diabetes using simple measures of insulin resistance - Combined results from the San Antonio Heart Study, the Mexico City Diabetes Study, and the Insulin Resistance Atherosclerosis Study AB - To determine and formally compare the ability of simple indexes of insulin resistance (IR) to predict type 2 diabetes, we used combined prospective data from the San Antonio Heart Study, the Mexico City Diabetes Study, and the Insulin Resistance Atherosclerosis Study, which include well-characterized cohorts of non-Hispanic white, African-American, Hispanic American, and Mexican subjects with 5-8 years of follow-up. Poisson regression was used to assess the ability of each candidate index to predict incident diabetes at the follow-up examination (343 of 3,574 subjects developed diabetes). The areas under the receiver operator characteristic (AROC) curves for each index were calculated and statistically compared. In pooled analysis, Gutt et al.'s insulin sensitivity index at 0 and 120 min (ISI0,120) displayed the largest AROC (78.5%). This index was significantly more predictive (P < 0.0001) than a large group of indexes (including those by Belflore, Avignon, Katz, and Stumvoll) that had AROC curves between 66 and 74%. These findings were essentially similar both after adjustment for covariates and when analyses were conducted separately by glucose tolerance status and ethnicity/study subgroups. In conclusion, we found substantial differences between published IR indexes in the prediction of diabetes, with ISI0,120 consistently showing the strongest prediction. Thin index may reflect other aspects of diabetes pathogenesis in addition to IR, which might explain its strong predictive abilities despite its moderate correlation with direct measures of IR MH - Canada MH - Mexico|Distrito Federal MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 45 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0012-1797 UR - ISI:000180891700033 L2 - ORAL GLUCOSE-TOLERANCE; SIMPLE INDEXES; SENSITIVITY; SECRETION; MELLITUS; RELEASE; DISEASE; RISK SO - Diabetes 2003 ;52(2):463-469 8277 UI - 8292 AU - Harcharras M AU - Ennaciri A AU - Assaaoudi H AU - Mattei G AU - D'Orazio V AU - Moliterni AGG AU - Capitelli F AD - CNR, Ist Cristallog, Dipartimento Geomineral, I-70125 Bari, ItalyUniv Ibn Tofail, Fac Sci, Dept Chem, Lab Spect, Mexico City 14000, DF, MexicoCNR, Ist Metodol Inorgan & Plasmi, IMIP, Area Ricerca Roma Montelibretti, Rome, ItalyUniv Bari, Dipartimento Biol & Chim Agro Forestale L& Ambien, I-70126 Bari, ItalyCapitelli, F, CNR, Ist Cristallog, Dipartimento Geomineral, Via Orabona 4, I-70125 Bari, Italy TI - Crystal structure and vibrational spectra of tetrasodium dimagnesium dihydrogen diphosphate octahydrate Na4Mg2(H2P2O7)(4) center dot 8H(2)O AB - A tetrasodium dimagnesium dihydrogen diphosphate octahydrate Na4Mg2(H2P2O7)(4) . 8H(2)O was synthesized. It crystallizes in the monoclinic system, space group P2(1)/m (no. 11), Z = 4, and its unit-cell parameters are: a = 8.0445(3) Angstrom, b = 11.5244(5) Angstrom, c = 9.0825 (4) Angstrom, beta = 113.1401 (2)degrees, V = 774.28 (6), Angstrom(3). The structure was determined by single-crystal X-ray diffractometry and refined to a R index of 0.0294 (wR = 0.0727) for 1878 independent reflections with I > 2sigma(I). The framework is made by the alternance of layers Of MgO6/NaO6 octahedra and double tetrahedra PO4 along b-axis. Such layers are characterized by the presence of strong hydrogen bonds. (H2P2O7)(2-) anions exhibit bent eclipsed conformation. Besides, the crystal was analyzed by FT-IR and micro-Raman vibrational spectroscopy. No coincidences of the majority of the Raman and infrared spectra bands of Na4Mg2(H2P2O7)(4) . 8H(2)O confirms a centrosymmetric structure of this material. The vibrational spectra confirm the bent POP configuration in this compound. (C) 2003 Elsevier Science (USA). All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000183286200024 L2 - diphosphate;X-ray diffraction;FT-IR spectra;RA spectra;RAMAN-SPECTRA; DIHYDRATE; PHOSPHATE; CS; IR SO - Journal of Solid State Chemistry 2003 ;172(1):160-165 8278 UI - 8283 AU - Hartkamp AD AU - White JW AU - Hoogenboom G AD - Univ Georgia, Dept Biol & Agr Engn, Griffin, GA 30223, USACIMMYT, Nat Res Grp, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoHoogenboom, G, Univ Georgia, Dept Biol & Agr Engn, Griffin, GA 30223 USA TI - Comparison of three weather generators for crop modeling: a case study for subtropical environments AB - The use and application of decision support systems (DDS) that consider variation in climate and soil conditions has expanded in recent years. Most of these DSS are based on crop simulation models that require daily weather data, so access to weather data, at single sites as well as large amount of sites that may cover a region, becomes a critical issue. In many agricultural regions, especially in developing countries, the density of meteorological stations is low, and reliable long-term continuous data are scarce. Researchers can use interpolated surfaces of weekly or monthly climate variables and generate daily weather from these. Various software tools, called 'weather generators', are available to automate this data generation process. The main objective of this study was to compare the performance of three weather generators, MARKSIM, SIMMETEO and WGEN, with observed daily weather data for one of the major maize growing regions in northwest Mexico. A second objective was to evaluate the impact of using different generators for creating daily weather data for the simulation of maize and bean growth at nine locations. No single generator was clearly superior. However, considering data requirements, the weather generator SIMMETEO is robust and can be recommended for (crop) modeling applications at single point locations as well as for applications that use interpolated summary weather data as input. The weather generator MARKSIM created a high inter-annual variability and long chains of wet days that are not found in observed data, but the generator has use for areas of poor distribution of weather stations or where monthly means are unavailable. The results from this study can be considered valid for the subtropical region from which the test locations were selected. For climates in different regions of the world, we suggest repeating the evaluation process following procedures similar to those used in this paper. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0308-521X UR - ISI:000183414600008 L2 - climate;precipitation;modeling;decision support system;spatial variability;SIMULATION-MODEL; RAINFALL; VARIABILITY; SURFACES; SOIL; GIS SO - Agricultural Systems 2003 ;76(2):539-560 8279 UI - 7222 AU - Hartogensis OK AU - Watts CJ AU - Rodriguez JC AU - De Bruin HAR AD - Univ Wageningen & Res Ctr, Dept Meteorol & Air Qual, NL-6701 AP Wageningen, NetherlandsIMADES, Inst Medio Ambiente & Desarollo Sustenable, Hermosillo, Sonora, MexicoHartogensis, OK, Univ Wageningen & Res Ctr, Dept Meteorol & Air Qual, Duivendaal 2, NL-6701 AP Wageningen, Netherlands TI - Derivation of an effective height for scintillometers: La Poza experiment in Northwest Mexico AB - The large-aperture scintillometer (LAS) is by now a generally accepted device for routinely obtaining the area-averaged sensible heat flux, H, on a scale of up to 10 km. It is an optical instrument that consists of a transmitter and receiver. In practice, the LAS beam height often varies along the path due to a variety of reasons. This study will explain what effective height to use in such situations, when analyzing scintillometer data to derive H. Several aspects are covered: a slanted path over flat terrain, structured terrain, and varying path height due to the curvature of the earth's surface. To test the derived effective height formulation the authors present LAS data taken in September and October 1996 at a rangeland site in Sonora, Mexico. In experiment 1, the LAS was set up over a slant path, ranging roughly between 10 and 45 m above the surface over a 3200-m path. In experiment 2, a horizontal LAS path was used at approximately 30 m over a pathlength of 1100 m. The resulting sensible heat fluxes were compared with eddy-covariance data and show satisfactory results for both the full and one of the approximate formulations of the effective height MH - Mexico|Sonora MH - Netherlands PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1525-755X UR - ISI:000185945200011 L2 - LARGE-APERTURE SCINTILLOMETER; FLEVOLAND FIELD EXPERIMENT; SENSIBLE HEAT FLUXES; REFRACTIVE-INDEX; HETEROGENEOUS SURFACE; AREA; SCINTILLATION; FLUCTUATIONS SO - Journal of Hydrometeorology 2003 ;4(5):915-928 8280 UI - 6524 AU - Harvey SC AU - Boonphakdee C AU - Carnpos-Ramos R AU - Ezaz MT AU - Griffin DK AU - Bromage NR AU - Penman DJ AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandBrunel Univ, Dept Biol Sci, Uxbridge UB8 3PH, Middx, EnglandCtr Invest Biol Noroeste SC, CIBNOR, La Paz, Baja California, MexicoPenman, DJ, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - Analysis of repetitive DNA sequences in the sex chromosomes of Oreochromis niloticus AB - In the Nile tilapia, Oreochromis niloticus, sex determination is primarily genetic, with XX females and XY males. While the X and Y chromosomes (the largest pair) cannot be distinguished in mitotic chromosome spreads, analysis of comparative hybridization of X and Y chromosome derived probes (produced, by microdissection and DOP-PCR, from XX and YY genotypes, respectively) to different genotypes (XX, XY and YY) has demonstrated that sequence differences exist between the sex chromosomes. Here we report the characterization of these probes, showing that a significant proportion of the amplified sequences represent various transposable elements. We further demonstrate that concentrations of a number of these individual elements are found on the sex chromosomes and that the distribution of two such elements differs between the X and Y chromosomes. These findings are discussed in relation to sex chromosome differentiation in O. niloticus and to the changes expected during the early stages of sex chromosome evolution. Copyright (C) 2003 S. Karger AG, Basel MH - United Kingdom MH - Mexico|Baja California PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 4 U4 - Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1424-8581 UR - ISI:000187808800021 L2 - SYNAPTONEMAL COMPLEX-ANALYSIS; TRANSPOSABLE ELEMENTS; CAENORHABDITIS-ELEGANS; CYTOGENETIC ANALYSIS; RECOMBINATION RATE; Y-CHROMOSOMES; X-CHROMOSOMES; NILE TILAPIA; FISH; DIFFERENTIATION SO - Cytogenetic and Genome Research 2003 ;101(3-4):314-319 8281 UI - 3538 AU - Hayashi N AU - Kaikina EI AU - Naumkin PI AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia, Michoacan, MexicoUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - Global existence and time decay of small solutions to the Landau-Ginzburg type equations MH - Japan MH - Mexico|Michoacan PB - JERUSALEM: MAGNES PRESS RP - NOT IN FILE U3 - TC 8 U4 - Mathematics U5 - J;Article AV - English IS - 0021-7670 UR - ISI:000226077700006 L2 - CAUCHY-PROBLEM; HEAT-EQUATION; LOCAL SPACES; BEHAVIOR; NONEXISTENCE SO - Journal D Analyse Mathematique 2003 ;90():141-173 8282 UI - 7064 AU - Hayashi N AU - Kaikina EI AU - Zavala JLG AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanInst Tecnol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoInst Tecnol Morelia, Programa Grad & Invest Ingn Elect, Morelia 58120, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - On the boundary-value problem for the Korteweg-de Vries equation MH - Japan MH - Mexico|Michoacan PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 6 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1364-5021 UR - ISI:000186321800010 L2 - nonlinear evolution equation;large-time asymptotics;Korteweg-de Vries equation;half-line;DEVRIES EQUATION; ASYMPTOTICS SO - Proceedings of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 2003 ;459(2039):2861-2884 8283 UI - 7837 AU - Hayashi N AU - Naumkin PI AD - Osaka Univ, Dept Math, Grad Sch Sci, Toyonaka, Osaka 5600043, JapanUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoHayashi, N, Osaka Univ, Dept Math, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan TI - Asymptotics for the Burgers equation with pumping AB - We consider the large time asymptotic behavior of solutions to the initial-boundary value problem [GRAPHICS] We find large time asymptotic formulas of solutions for three different cases 1) a(+/-)=+/-1, 2) a(+/-)=-/+1 and 3) a(+/-)=0 MH - Japan MH - Mexico|Michoacan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0010-3616 UR - ISI:000184503900011 L2 - LARGE TIME BEHAVIOR; HEAT-EQUATION; WAVES SO - Communications in Mathematical Physics 2003 ;239(1-2):287-307 8284 UI - 8635 AU - Hayashi N AU - Kaikina EI AU - Naumkin PI AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanInst Technol Morelia, Dept Ciencias Basicas, Morelia 58120, Michoacan, MexicoUNAM, Inst Matemat, Michoacan 58089, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - Landau-Ginzburg type equations in the subcritical case AB - We study the Cauchy problem for the nonlinear Landau-Ginzburg equation {partial derivative(t)u - alphaDeltau + beta\u\(sigma)u = 0, x epsilon R-n, t > 0, {u(0,x) = u(0)(x), x epsilon R-n, where alpha,beta epsilon C with dissipation condition Ralpha > 0. We are interested in the subcritical case sigma epsilon (0,2/n). We assume that theta = \integral u(0)(x)dx\ not approximate to 0 and Rdelta(alpha,beta) > 0, where delta(alpha,beta) = beta\alpha\(n-n/2sigma)/((2 + sigma) \alpha\(2) + sigmaalpha(2))(n/2). Futhermore we suppose that the initial data u(0) epsilon L-1 are such that (1 + \x\)(a)u(0) epsilon L-1, with sufficiently small norm epsilon = parallel to(1 + \x\(a)u(0)parallel to(1), where a epsilon (0,1). Also we assume that sigma is sufficiently close to 2/n. Then there exists a unique solution of the Cauchy problem (*) such that u(t,x) epsilon C((0,infinity); L-infinity) boolean AND C(\0,infinity);L-1), satisfying the following time decay estimates for large t > 0 parallel tou(t)parallel to(infinity) less than or equal to Cepsilon1/sigma. Note that in comparison with the corresponding linear case the decay rate of the solutions of (*) is more rapid MH - Japan MH - Mexico|Michoacan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0219-1997 UR - ISI:000182452900006 L2 - dissipative nonlinear evolution equation;large time asymptotics;Landau-Ginzburg equation;LARGE TIME BEHAVIOR; CAUCHY-PROBLEM; LOCAL SPACES SO - Communications in Contemporary Mathematics 2003 ;5(1):127-145 8285 UI - 9002 AU - Hayes PM AU - Corey AE AU - Mundt C AU - Toojinda T AU - Vivar H AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97731, USAOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97731, USAKasetsart Univ, Natl Ctr Genet Engn & Biotechnol, DNA Fingerprinting Unit, Nakhon Pathom, ThailandCIMMYT, ICARDA, Mexico City 06600, DF, MexicoHayes, PM, Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97731 USA TI - Registration of 'Tango' barley MH - Mexico|Distrito Federal MH - Thailand MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000181479700040 L2 - F-SP HORDEI; RESISTANCE SO - Crop Science 2003 ;43(2):729-731 8286 UI - 8069 AU - He W AU - Gonsalves KE AU - Batina N AU - Poker DB AU - Alexander E AU - Hudson M AD - Univ N Carolina, Dept Chem, Charlotte, NC 28223, USAUniv N Carolina, Cameron Appl Res Ctr, Charlotte, NC 28223, USAUniv Connecticut, Dept Chem, Storrs, CT, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoOak Ridge Natl Lab, Oak Ridge, TN, USAUniv N Carolina, Dept Biol, Charlotte, NC 28223, USAGonsalves, KE, Univ N Carolina, Dept Chem, Charlotte, NC 28223, USA TI - Micro/nanomachining of polymer surface for promoting Osteoblast cell adhesion AB - Interactions between cells and biomaterials are affected by surface properties. Therefore, various approaches have been introduced for surface modifications. Here a technique based on ion beam lithography to improve osteoblast cell adhesion on polymeric materials is reported. We have demonstrated that exposing the polymer to P+ or Ar+ ions through masks can generate micro/ nano-scale patterns. Our results illustrate that after exposure to an ion beam, the amount of osteoblast cells attached to the polymer was enhanced as a consequence of the roughened surface as well as due to the implanted ions. This indicates that masked ion beam lithography (MIBL) can not only generate nanostructures on the surface of a biocompatible polymer, but can also selectively modify the surface chemistry by implanting with specific ions. These factors can contribute to an osteogenic environment MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Biomedical;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 1387-2176 UR - ISI:000183903900002 L2 - bone tissue engineering;ion implantation;polymers osteoblast cells;micromachining;ION-IMPLANTED TITANIUM; BONE; BIOMATERIALS; PROLIFERATION; MIGRATION; ROUGHNESS; BEHAVIOR; RAT; F+ SO - Biomedical Microdevices 2003 ;5(2):101-108 8287 UI - 9330 AU - He W AU - Poker DB AU - Gonsalves KE AU - Batina N AD - Univ N Carolina, Dept Chem, Charlotte, NC 28223, USAUniv N Carolina, CC Cameron Appl Res Ctr, Charlotte, NC 28223, USAUniv Connecticut, Inst Mat Sci, Storrs, CT 06269, USAOak Ridge Natl Lab, Oak Ridge, TN 37831, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoGonsalves, KE, Univ N Carolina, Dept Chem, Charlotte, NC 28223, USA TI - Micro/nano machining of polymeric substrates by ion beam techniques AB - Ion beam lithography was studied as an alternative approach for micro/nano machining of polymeric substrates. Our preliminary study was carried out using poly(methyl methacrylate) (PMMA) as a model system. Spin cast PMMA films were submitted to masked Ca+ ion implantation (85 keV, 1 X 10(14) ions/cm(2)), and P+ ion implantations (85 keV, 1 X 10(15) and 1 X 10(16) ions /cm(2) respectively). The patterns generated on the films were characterized by AFM as arrays of holes with nanoscale depth and microscale width. The effect of ion implantation on surface property was investigated by measuring surface hydrophobicity. The results showed that masked ion beam lithography can change not only the surface topography, but also the surface hydrophobicity. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Optics;Physics, Applied U5 - J;Article AV - English IS - 0167-9317 UR - ISI:000180598000013 L2 - microfabrication;PMMA;ion implantation;hydrophobicity;SURFACE MODIFICATION; CELL-ADHESION; IMPLANTATION SO - Microelectronic Engineering 2003 ;65(1-2):153-161 8288 UI - 8341 AU - He ZH AU - Liu AH AU - Pena RJ AU - Rajaram S AD - Chinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Natl Wheat Improvement Ctr, Key Lab Crop Genet & Breeding, Beijing 100081, Peoples R ChinaChinese Acad Agr Sci, CIMMYT China, Beijing 100081, Peoples R ChinaCIMMYT, Mexico City 066000, DF, MexicoHe, ZH, Chinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Natl Wheat Improvement Ctr, Key Lab Crop Genet & Breeding, 12 Zhongguancun South St, Beijing 100081, Peoples R China TI - Suitability of Chinese wheat cultivars for production of northern style Chinese steamed bread AB - Fifty-six bread wheat cultivars and advanced lines from major Chinese wheat growing regions and 10 Australian cultivars were grown in Anyang located in Yellow and Huai Valleys and Chengdu located in Yangtze region. The genotypes were examined for their suitability to produce northern style Chinese steamed bread (CSB) and used to investigate the association between wheat quality traits and performance of northern style CSB under manual and mechanized processing conditions. Anyang-sown wheat samples showed better grain quality characteristics and CSB quality than the Chengdu-sown materials. These differences were largely due to adverse climatic conditions prevailing in Chengdu that resulted in the deterioration of flour whiteness, Farinograph stability, and starch quality. Therefore, Chengdu was generally unfavorable for producing good quality wheat. However, significant variability among cultivars was observed in Chengdu, and Batavia, Dollarbird, and Tasman from Australia and Jing 411, Xiaoyan 6, and Shaan 229 from China showed very good CSB quality under manual conditions, and Hartog, Batavia, Tasman, and Vulcan from Australia, and Jing 411 and Dongfeng 1 from China were identified to confer good CSB quality under mechanized conditions. The wide range of CSB quality variations indicates that genetic improvement of CSB quality is possible in both environments. Protein content, gluten strength, and extensibility were positively associated with loaf volume and steamed bread elasticity. The relationship between gluten strength, extensibility, and appearance and stickiness were highly dependent on processing methods, i.e., negatively using a manual method and positively or slightly negatively using a mechanized process. Therefore, wheat quality requirement for CSB depends on CSB processing conditions. Medium protein content and medium-to-strong gluten strength with good extensibility is desirable for mechanized methods, but weak-to-medium gluten type for manual methods. High flour whiteness and RVA peak viscosity was found desirable for CSB quality regardless of the processing method used. Flour whiteness, falling number, and peak viscosity appeared to be more crucial in determining CSB quality in Chengdu, although protein content and Farinograph stability also contributed to appearance, elasticity, and stickiness MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000183125200002 L2 - bread wheat;Chinese steamed bread;gluten strength;protein content;starch quality;Triticum aestivum;QUALITY; FLOURS SO - Euphytica 2003 ;131(2):155-163 8289 UI - 8345 AU - Heckel G AU - Espejel I AU - Fischer DW AD - Univ Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoHeckel, G, CICESE, San Diego, CA 92143, USA TI - Issue definition and planning for whalewatching management strategies in Ensenada, Mexico AB - The exceptional growth of whalewatching in Baja California Sur (BCS) and other parts of Mexico during the last 10 years motivated the design and implementation of a Mexican whalewatching law based on experiences in BCS. However, recent research in the Ensenada whalewatching area confirms that this law is insufficient in this area because whalewatching boats and other fishing, cruising, or drifting boats influence the behavior (swimming direction and velocity) of migrating gray whales. In the long term, the migration corridor might be displaced offshore, and whalewatching may become infeasible. This study proposes a management planning process to adapt regulations to this area, to promote adherence to regulations by encouraging self-regulation and strengthening law enforcement, and to enhance the tourist service on board. The actors involved were identified MH - Mexico|Baja California MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0892-0753 UR - ISI:000183188100005 L2 - coastal ecotourism;Ensenada;Mexico;gray whale;management;whale-watching;COASTAL MANAGEMENT; DOLPHINS; WHALES; BOATS SO - Coastal Management 2003 ;31(3):277-296 8290 UI - 7943 AU - Hennart JP AU - Mund EH AU - del Valle E AD - Free Univ Brussels, Serv Metrol Nucl, B-1050 Brussels, BelgiumUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv Catholique Louvain, Unite Thermodynam, B-1348 Louvain, BelgiumInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoMund, EH, Free Univ Brussels, Serv Metrol Nucl, 808 Route Lennik, B-1050 Brussels, Belgium TI - Third order nodal finite element methods with transverse and reduced integration for elliptic problems AB - This paper describes a solution technique for multidimensional elliptic problems based on the use of some third order nodal finite elements and on a reduction of the basic (multidimensional) problem to a set of coupled one-dimensional problems. This solution technique, developed rather heuristically in the framework of nuclear reactor computations in conjunction with early nodal methods, gets on a much firmer ground when applied with nodal finite elements. The first part of the paper deals with the general context of variational nodal finite element methods. The so-called "Transverse and Reduced Integration Method" is then described in the second part of the paper. Its numerical properties are illustrated by some examples. (C) 2003 IMACS. Published by Elsevier B.V. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000184215800006 L2 - nodal methods;high order schemes;variational methods;diffusion processes;DIFFUSION; APPROXIMATION; EQUATIONS SO - Applied Numerical Mathematics 2003 ;46(2):209-230 8291 UI - 8825 AU - Henson RNA AU - Cansino S AU - Herron JE AU - Robb WGK AU - Rugg MD AD - Univ Coll London, Max Planck Inst Cognit Neurosci, London WC1N 3AR, EnglandUniv Coll London, Inst Neurol, Wellcome Dept Imaging Neurosci, London WC1N 3AR, EnglandNatl Autonomous Univ Mexico, Fac Psychol, Lab Neurocognit, Mexico City 04510, DF, MexicoUniv Wales Coll Cardiff, Sch Psychol, Cardiff CF1 1XL, S Glam, WalesRugg, MD, Univ Coll London, Max Planck Inst Cognit Neurosci, 17 Queen Sq, London WC1N 3AR, England TI - A familiarity signal in human anterior medial temporal cortex? MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 72 U4 - Neurosciences U5 - J;Article AV - English IS - 1050-9631 UR - ISI:000181958100012 L2 - RECOGNITION MEMORY; PERIRHINAL CORTEX; LOBE; FMRI; HIPPOCAMPAL; RETRIEVAL; NOVELTY; ROLES; BRAIN SO - Hippocampus 2003 ;13(2):301-304 8292 UI - 6921 AU - Heredia-Ureta H AU - Cruz-Perez FA AU - Ortigoza-Guerrero L AD - IPN, CINVESTAV, Ctr Res & Adv Studies, Commun Sect, Mexico City 07360, DF, MexicoWFI, San Diego, CA 92122, USAHeredia-Ureta, H, Univ Occidente, Campus Culiacan,Carretera Culicancito Km 1-5, Sinaloa 80020, Mexico TI - Capacity optimization in multiservice mobile wireless networks with multiple fractional channel reservation AB - In this paper, the multiple fractional channel reservation (MFCR) strategy for service differentiation is proposed. MFCR overcomes the "integer nature" of traditional channel reservation schemes (also referred as guard channel, trunk reservation, or cutoff priority) that precludes them to achieve maximum system capacity in single- and multiservice environments. Contrary to the rest of channel reservation schemes previously proposed in the literature on the topic, MFCR reserves, on average, real numbers of channels to prioritize new and/or handoff calls in multiple service environments. Given a set of requirements on new call blocking and forced termination probabilities for each service type, MFCR maximizes system capacity while meeting the Quality of Service (QoS) constraints in multiservice mobile cellular networks. It finely controls the communication service quality, by varying the average numbers of reserved channels by a fraction of one. Determining the right amount of resources (cutoff threshold or number of reserved channels) to prioritize each call type and to satisfy all QoS constraints in multiservice environments, however, is a difficult task. Selecting the optimal prioritization order is not an easy process either, as it is affected by QoS constraints, system characteristics, and resource sharing. Thus, an heuristic algorithm to determine the optimum numbers of reserved (resources) channels to achieve maximum system capacity when using the MFCR is also proposed. To our knowledge, the capacity optimization problem considering individual QoS constraints had only been addressed in single service environments. Also, a comprehensive survey on channel reservation strategies proposed in the literature has been included MH - Mexico|Distrito Federal MH - Mexico|Sinaloa MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Electrical & Electronic;Telecommunications;Transportation Science & Technology U5 - J;Article AV - English IS - 0018-9545 UR - ISI:000186720800010 L2 - capacity optimization;channel reservation;integrated services;radio resource management;service differentiation;CALL ADMISSION CONTROL; RADIO TELEPHONE SYSTEMS; PERFORMANCE ANALYSIS; CELLULAR COMMUNICATIONS; COMMUNICATION-SYSTEMS; GUARD CHANNELS; MIXED SERVICES; PLATFORM TYPES; PRIORITY; HANDOFF SO - Ieee Transactions on Vehicular Technology 2003 ;52(6):1519-1539 8293 UI - 8992 AU - Heredia-Ureta H AU - Cruz-Perez FA AU - Ortigoza-Guerrero L AD - CINVESTAV, IPN, Commun Sect, Mexico City 07360, DF, MexicoWFI, San Diego, CA 92121, USAHeredia-Ureta, H, CINVESTAV, IPN, Commun Sect, IPN 2508,Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Multiple fractional channel reservation for optimum system capacity in multi-service cellular networks AB - The multiple fractional channel reservation (MFCR) strategy for service differentiation is proposed. It reserves, on average, real numbers of channels to prioritise new and/or handoff calls in multiple service environments. Also, an algorithm to determine the optimum numbers of reserved channels to achieve maximum system capacity when using the MFCR strategy is proposed MH - Mexico|Distrito Federal MH - USA PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000181461300088 L2 - MOBILE SO - Electronics Letters 2003 ;39(1):133-134 8294 UI - 6564 AU - Heredia N AU - Arechiga E AU - Labbe R AU - Garcia S AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, San Nicolas 66451, NL, MexicoUniv Massachusetts, Dept Food Sci, Amherst, MA 01003, USAGarcia, S, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Apdo Postal 124-F, San Nicolas 66451, NL, Mexico TI - Stress proteins of Clostridium perfringens type A immunoreact with antiserum from rabbits infected with gas gangrene AB - Various stressors were used to induce stress proteins in Clostridium perfringens. Cultures of C. perfringens FD-1041 were subjected to cold shock (28degreesC for I h), acid shock (pH 4.5 for 30 min), or heat shock (50degreesC for 30 min). Cells were lysed and protein samples were analyzed by immunoblotting with antiserum derived from rabbits suffering from gas gangrene. Eight cold shock proteins (approximate M-r 101, 82, 70, 37, 22, 12, 10 and 6 kDa) and also eight heat shock proteins (approximate M, 101, 82, 70, 27, 22, 16, 12 and 10 kDa) were immunoreactive with the serum. No immunoreactive proteins were detected in samples subjected to acid shock proteins and,purified DnaK protein was also non-immunoreactive with the serum. These immunogenic stress proteins may be important in regulating diseases caused by C. perfringens. Such proteins could be involved in cell survival mechanisms, serve as targets during infection, or play a role in recognition of the bacteria by the host MH - Mexico|Nuevo Leon MH - USA PB - HEIDELBERG: SPRINGER-VERLAG HEIDELBERG RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1139-6709 UR - ISI:000187740400006 L2 - Clostridium perfringens;immunogenic proteins;stress proteins;stress response;HEAT-SHOCK PROTEINS; VIRULENCE FACTORS SO - International Microbiology 2003 ;6(4):259-261 8295 UI - 9263 AU - Herlihy M AU - Rajsbaum S AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoBrown Univ, Dept Comp Sci, Providence, RI 02912, USARajsbaum, S, Natl Autonomous Univ Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A classification of wait-free loop agreement tasks AB - Loop agreement is a family of wait-free tasks that includes instances of set agreement and approximate agreement tasks, A task S implements task F if one can construct a solution to F from a solution to G, possibly followed by access to a read/write memory. Loop agreement tasks form a lattice under this notion of implementation. This paper presents a classification of loop agreement tasks. Each loop agreement task can be assigned an algebraic signature consisting of a finitely presented group G and a distinguished element g in G. This signature characterizes the task's power to implement other tasks. If :F and G are loop agreement tasks with respective signatures and , then F implements G if and only if there exists a group homomorphism h : F --> G carrying f to g. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0304-3975 UR - ISI:000180738300004 L2 - DISTRIBUTED CONSENSUS; IMPOSSIBILITY SO - Theoretical Computer Science 2003 ;291(1):55-77 8296 UI - 6687 AU - Hernandez-Arana HA AU - Rowden AA AU - Attrill MJ AU - Warwick RM AU - Gold-Bouchot G AD - Univ Plymouth, Sch Biol Sci, Plymouth PL4 8AA, Devon, EnglandPlymouth Marine Lab, Plymouth PL1 3DH, Devon, EnglandCINVESTAV, IPN, Unidad Merida, Merida 97310, Yucatan, MexicoAttrill, MJ, Univ Plymouth, Sch Biol Sci, Drake Circus, Plymouth PL4 8AA, Devon, England TI - Large-scale environmental influences on the benthic macroinfauna of the southern Gulf of Mexico AB - The influence of large-scale natural disturbance from winter storms ('northers') and river runoff on the macrobenthic community structure of the southern Gulf of Mexico was investigated in both carbonate and transitional carbonate-terrigenous sedimentary environments. Samples of the infauna were obtained in three seasons from 13 stations from two 250 km transects along 80-170 and 20-50 m water depth. Samples after the northers season had the lowest total number of families and individuals, 114 and 2940, respectively, compared to the dry and rainy seasons with 129 and 132 families and 11580 and 15266 individuals, respectively. Spatial patterns of macroinfauna composition varied across and along the shelf as a response to sedimentary environments and depth. Coarser sediments from the carbonate area harboured the highest mean densities per station with 500-24,000 individuals m(-2) and 108-122 families in total, compared to the transitional sediment with 500-8200 individuals m(-2) and 56-74 families across the three seasons. Univariate and multivariate statistical techniques demonstrated that low densities and number of taxa were associated with winter storms, but storm influence was dependent on depth and sediment type. Multiple linear regression analysis and BIOENV analysis indicated that sediment mean grain size, percentage of clay and organic matter best explained the macroinfauna spatial patterns, although BIOENV indicated that depth has an overriding role. An increase in densities of opportunistic taxa (numerous polychaetes of small sizes) was observed four months after the 'northers' and this was more evident in the area of carbonate sediment. Additionally a combined disturbance from northers and river runoff is suspected to be responsible for a naturally impoverished macroinfauna community in the transitional sedimentary environment. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Yucatan PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000187247700012 L2 - benthic macroinfauna;natural disturbance;carbonate and terrigenous sediments;Campeche Shelf;Gulf of Mexico;SOFT-SEDIMENT BENTHOS; CONTINENTAL-SHELF; COMMUNITY STRUCTURE; INNER SHELF; DISTURBANCE; VARIABILITY; CALIFORNIA; RESPONSES; BANKS; STORM SO - Estuarine Coastal and Shelf Science 2003 ;58(4):825-841 8297 UI - 9114 AU - Hernandez-Avila M AU - Gonzalez-Cossio T AU - Hernandez-Avila JE AU - Romieu I AU - Peterson KE AU - Aro A AU - Palazuelos E AU - Hu H AD - Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62508, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Maternal & Child Hlth, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USAAmer British Cowdray Hosp, Mexico City, DF, MexicoHernandez-Avila, M, Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Dietary calcium supplements to lower blood lead levels in lactating women: A randomized placebo-controlled trial AB - Background. Pregnancy and breastfeeding mobilize lead stored in bone, which may be a hazard for the fetus and infant. We tested the hypothesis that in lactating women a dietary calcium supplement will lower blood lead levels. Methods. Between 1994 and 1995 we conducted a randomized trial among women in Mexico City. Lactating women (N = 617; mean age = 24 years; mean blood lead level = 8.5 ug/dL) were randomly assigned to receive either calcium carbonate (1200 mg of elemental calcium daily) or placebo in a double-blind trial. Blood samples were obtained at baseline, and 3 and 6 months after the trial began. Blood lead was determined by graphite furnace atomic absorption spectroscopy. Bone lead was measured at baseline with a 109cd K x-ray fluorescence instrument. The primary endpoint was change in maternal blood lead level, which was analyzed in relation to supplement use and other covariates by multivariate generalized linear models for longitudinal observations. Results. An intention-to-treat analysis showed that women randomized to the calcium supplements experienced a small decline in blood lead levels (overall reduction of 0.29 ug/dL; 95% confidence interval = -0.85 to 0.26). The effect was more apparent among women who were compliant with supplement rise and had high bone lead levels (patella bone lead greater than or equal to5 mug/gm bone). Among this subgroup, supplement use was associated with an estimated reduction in mean blood lead of 1.16 ug/dL (95% confidence interval = -2.08 to -0.23), an overall reduction of. 16.4%. Conclusions. Among lactating women with relatively high lead burden, calcium supplementation was associated with a modest reduction in blood lead levels MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 16 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1044-3983 UR - ISI:000181174300014 L2 - randomized clinical trial;breastfeeding;blood lead;calcium supplementation;X-RAY-FLUORESCENCE; BONE LEAD; MEXICO-CITY; POSTPARTUM WOMEN; PREGNANCY; DENSITY; MOBILIZATION; ABSORPTION; RETENTION; SKELETON SO - Epidemiology 2003 ;14(2):206-212 8298 UI - 8595 AU - Hernandez-Beltran A AU - Quintana-Solorzano RQ AU - Sanchez-Valente J AU - Pedraza-Archila F AU - Figueras F AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoInst Rech Catalyse, F-69626 Villeurbanne, FranceHernandez-Beltran, A, Inst Mexicano Petr, Eje Cent L Cardenas 152, Mexico City 07730, DF, Mexico TI - Effect of highly reactive sulfur species on sulfur reduction in cracking gasoline AB - Stringent regulations for engine fuels have stimulated R&D work for reducing sulfur in cracked naphtha in the recent years. In order to progress in this issue information on the effect of the chemistry of sulfur compounds under cracking conditions is needed. In this work, hexyl-2-thiol was spiked in a gasoil feed and the effect on sulfur in gasoline was studied with an equilibrium catalyst (Ecat) and a commercial gasoline sulfur reduction additive. Spiked feeds showed lower conversion. The hexyl-2-thiol mainly produced H2S and exhibited a competitive reaction with sulfur compounds contained in gasoil. Higher amounts of sulfur-in-coke were produced with the Ecat-additive blend compared to Ecat thus indicating that the hexyl-2-thiol adsorbs stronger on the additive which can be due to its Lewis acid properties. While the additive moderates the detrimental effect of hexyl-2-thiol on the catalyst activity its activity for sulfur reduction in gasoline was constrained. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Engineering, Environmental;Engineering, Chemical U5 - J;Article AV - English IS - 0926-3373 UR - ISI:000182553700003 L2 - FCC;sulfur in gasoline;sulfur reducing additive;thiophene;benzothiophene;alkylthiophenes;sulfur-in-coke;CATALYTIC CRACKING; REMOVAL; ADDITIVES; ZEOLITES; NAPHTHA SO - Applied Catalysis B-Environmental 2003 ;42(2):145-154 8299 UI - 6239 AU - Hernandez-Beltran F AU - Quintana-Solorzano R AU - Sanchez-Valente J AU - Figueras F AD - Inst Mexicano Petr, Programa Tratamiento Crudo Maya, Mexico City 07730, DF, MexicoInst Rech Catalyse, F-69626 Villeurbanne, France TI - On the effect of a high reactive sulfur species on sulfur reduction in gasoline MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187062501233 SO - Abstracts of Papers of the American Chemical Society 2003 ;226():U256-U256 8300 UI - 6898 AU - Hernandez-Castro R AU - Rodriguez MC AU - Seoane A AU - Lobo JMG AD - Univ Cantabria, Fac Med, Dept Biol Mol, Unidad Asoc,Ctr Invest Biol, Santiago 39011, SpainUniv Nacl Autonoma Mexico, Dept Microbiol & Inmunol, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoLobo, JMG, Univ Cantabria, Fac Med, Dept Biol Mol, Unidad Asoc,Ctr Invest Biol, Cardenal Herrera Oria S-N, Santiago 39011, Spain TI - The aquaporin gene aqpX of Brucella abortus is induced in hyperosmotic conditions AB - An aquaporin gene (aqpk) was previously detected in the pathogenic bacterium Brucella abortus. Earlier studies showed that AqpX mediated rapid and large water fluxes in both directions in response to sudden osmotic up- or downshifts. Here, to study the role and the expression of the aqpX gene in B. abortus, an aqpX null mutant was constructed using an aqpX:: lacZ gene fusion. This mutant showed no significant difference in growth rate compared to the wild-type strain when grown in rich and minimal media, demonstrating that disruption of the aqpX gene was not lethal for B. abortus. The role of the B. abortus AqpX water channel was investigated by exposing the cells to hypo- and hyperosmolar conditions. While in hyperosmolar environments the growth rate of the knockout mutant was not affected, in hypo-osmolar conditions this mutant showed reduced viability after 50 h of growth. beta-Galactosidase assays and RT-PCR revealed that aqpX gene expression and the amount of aqpX mRNA were markedly increased in hyperosmolar conditions. Moreover, B. abortus aqpX expression levels were enhanced during the mid-exponential phase of growth. These results indicated that the expression of aqpX was regulated during the growth curve and induced in hyperosmolar conditions. This report is believed to be the first example of the induction of a bacterial aquaporin in hypertonic conditions MH - Mexico|Distrito Federal MH - Spain PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000186737200016 L2 - WATER CHANNEL PROTEIN; GRAM-NEGATIVE BACTERIA; ESCHERICHIA-COLI; MOLECULAR-CLONING; MEMBRANE; GLYCEROL; KIDNEY; FAMILY; RECONSTITUTION; PERMEABILITY SO - Microbiology-Sgm 2003 ;149():3185-3192 8301 UI - 8769 AU - Hernandez-Cruz G AU - Kantz H AU - Letz T AU - Ragwitz M AU - Ramos E AU - Rechtman R AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoMax Planck Inst Phys Komplexer Syst, D-01187 Dresden, GermanyHernandez-Cruz, G, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Noise-induced fluctuations of period lengths of stable periodic orbits AB - We discuss a class of one-dimensional maps, which possesses a globally attracting stable periodic orbit. Despite a strongly negative Lyapunov exponent, a small amount of noise can introduce fluctuations of the period length. It is shown that this is a reasonable model for the observed dynamics of a bubble formation experiment in a heated capillary embedded in boiling water MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000182020900038 L2 - INDUCED CRISES; DYNAMICS; TIMES; SETS SO - Physical Review e 2003 ;67(3): 8302 UI - 7225 AU - Hernandez-Gallegos O AU - Mendez FR AU - Cruz MVS AU - Cuellar O AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Reprod Biol Lab, Mexico City 04510, DF, MexicoUniv Utah, Salt Lake City, UT 84117, USAHernandez-Gallegos, O, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, AP 70-153, Mexico City 04510, DF, Mexico TI - Genetic homogeneity between populations of Aspidoscelis rodecki, a parthenogenetic lizard from the Yucatan Peninsula AB - We undertook skin-grafting between populations to determine whether Aspidoscelis rodecki originated from single, or multiple, parthenogenetically capable hybrids. We transplanted 292 skin grafts within and between the two most geographically distant populations, considering only grafts in animals surviving more than 45 days. Two hundred fifteen grafts were analyzed. Histocompatibility within (100%) and between (97.9%) populations suggests that A. rodecki was derived from a single, parthenogenetically capable, hybrid MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000185905900009 L2 - MITOCHONDRIAL-DNA ANALYSES; CNEMIDOPHORUS-NEOMEXICANUS; HYBRID ORIGINS; TEIID LIZARDS; RELATIVE AGE; HISTOCOMPATIBILITY; EVOLUTION; COZUMELA; COMPLEX; SAURIA SO - Journal of Herpetology 2003 ;37(3):527-532 8303 UI - 7492 AU - Hernandez-Guerrero C AU - Monzon-Bordonaba F AU - Jimenez-Zamudio L AU - hued-Ahued R AU - rechavaleta-Velasco F AU - Strauss JF AU - Vadillo-Ortega F AD - Inst Nacl Perinatol, Direct Res, Mexico City 11000, DF, MexicoInst Nacl Perinatol, Dept Ultrastruct, Mexico City 11000, DF, MexicoIPN, Escuela Nacl Ciencias Biol, Dept Immunol, Mexico City 11340, DF, MexicoUniv Penn, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAVadillo-Ortega, F, Inst Nacl Perinatol, Direct Res, Montes Urales 800, Mexico City 11000, DF, Mexico TI - In-vitro secretion of proinflammatory cytokines by human amniochorion carrying hyper-responsive gene polymorphisms of tumour necrosis factor-alpha and interleukin-1 beta AB - The identification of polymorphisms in genes encoding proinflammatory cytokines that affect transcription or the secretion rate has opened new ways to understand the variation in responses to infection during pregnancy. In this study, human amniochorion carrying hyper-responsive alleles of tumour necrosis factor-alpha (TNF-alpha: TNF*2 at -308) and interleukin-1beta (IL-1beta: IL-1*2 at +3953) were stimulated in vitro with bacterial lipopolysaccharide (LPS) and compared with tissues carrying the common alleles (TNF*1 and IL-1*1). Fetal membranes carrying the TNF*1 allele displayed an identical dose-response pattern to tissues carrying a TNF*2 allele, except at the highest dose of LPS tested (50 ng/ml) there was a significantly greater production of TNF-alpha in the presence of a TNF*2 allele. Membranes carrying the IL-1*2 polymorphism secreted IL-1beta in a dose-response curve that was different from IL-1* tissues when challenged with 5, 10 and 50 ng/ml LPS. These observations support the hypothesis that reproductive tissues carrying hyper-responsive proinflammatory cytokine genes may over-respond to intrauterine infection secreting higher amounts of cytokines, which in turn, may lead to adverse pregnancy outcomes MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1360-9947 UR - ISI:000185308200007 L2 - chorioamnion;IL-1 gene polymorphism;infection during pregnancy;preterm labour;TNF-alpha gene polymorphism;HUMAN FETAL MEMBRANES; PREGNANT RHESUS-MONKEYS; PRETERM DELIVERY; PROSTAGLANDIN PRODUCTION; TNF-ALPHA; INTRAAMNIOTIC INFECTION; RECEPTOR ANTAGONIST; PREMATURE RUPTURE; PROMOTER; DISEASE SO - Molecular Human Reproduction 2003 ;9(10):625-629 8304 UI - 7121 AU - Hernandez-Hernandez R AU - Alcocer L AU - Meny MG AU - Reyes AJ AD - Univ Ctr Occidental, Barquisimeto, VenezuelaGen Hosp, Mexico City, DF, MexicoInst Cardiovasc Theory, Montevideo, Uruguay TI - Effects of the first dose of lacidipine and of nifedipine GITS on timed blood pressure in essential hypertension MH - Mexico|Distrito Federal MH - Uruguay MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0263-6352 UR - ISI:000184406700626 SO - Journal of Hypertension 2003 ;21():S179-S180 8305 UI - 9307 AU - Hernandez-Lamoneda R AU - Hernandez MI AU - Campos-Martinez J AD - CSIC, Inst Matemat & Fis Fundamental, Madrid 28006, SpainUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoHernandez-Lamoneda, R, CSIC, Inst Matemat & Fis Fundamental, Serrano 123, Madrid 28006, Spain TI - A new singlet ab initio potential energy surface for studying vibrational relaxation in O-2(nu)+O-2 collisions AB - A new ab initio potential energy surface for the ground singlet state of the O-2 + O-2 system has been calculated. Good agreement with experiment is obtained for the van der Waals binding energy. The vibrational dependence of the potential, crucial for vibrational energy transfer studies, is analyzed and compared with other potential energy surfaces by performing quantum scattering calculations of the vibrational relaxation of O-2(v). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000180697300031 L2 - 2ND-ORDER PERTURBATION-THEORY; EXCITED OXYGEN MOLECULES; STATE RATE CONSTANTS; TRANSITION-STATE; O-2; SCATTERING SO - Chemical Physics Letters 2003 ;368(5-6):709-716 8306 UI - 6888 AU - Hernandez-Machado A AU - Lacasta AM AU - Mayoral E AU - Poire EC AD - Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, SpainUniv Politecn Catalunya, Dept Fis Aplicada, E-08028 Barcelona, SpainUNAM, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoHernandez-Machado, A, Univ Barcelona, Fac Fis, Dept ECM, Diagonal 647, E-08028 Barcelona, Spain TI - Phase-field model of Hele-Shaw flows in the high-viscosity contrast regime AB - A one-sided phase-field model is proposed to study the dynamics of unstable interfaces of Hele-Shaw flows in the high viscosity contrast regime. The corresponding macroscopic equations are obtained by means of an asymptotic expansion from the phase-field model. Numerical integrations of the phase-field model in a rectangular Hele-Shaw cell reproduce finger competition with the final evolution to a steady-state finger MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000186571200061 L2 - INTERFACIAL GROWTH; SURFACE-TENSION; CELL; INSTABILITY; RECONNECTION; PENETRATION; PINCHOFF; FLUID SO - Physical Review e 2003 ;68(4): 8307 UI - 7788 AU - Hernandez-Montalvo V AU - Martinez A AU - Hernandez-Chavez G AU - Bolivar F AU - Valle F AU - Gosset G AD - UNAM, Dept Mol Microbiol, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoGenencor Int Inc, Palo Alto, CA, USAValle, F, UNAM, Dept Mol Microbiol, Inst Biotecnol, AP 510-3, Cuernavaca 62271, Morelos, Mexico TI - Expression of galP and glk in a Escherichia coli PTS mutant restores glucose transport and increases glycolytic flux to fermentation products AB - In Escherichia coli, the uptake and phosphorylation of glucose is carried out mainly by the phosphotransferase system (PTS). Despite the efficiency of glucose transport by PTS, the required consumption of 1 mol of phosphoenolpyruvate (PEP) for each mol of internalized glucose represents a drawback for some biotechnological applications where PEP is a precursor of the desired product. For this reason, there is considerable interest in the generation of strains that can transport glucose efficiently by a non-PTS mechanism. The purpose of this work was to study the effect of different gene expression levels, of galactose permease (GalP) and glucokinase (Glk), on glucose internalization and phosphorylation in a E. coli PTS- strain. The W3110 PTS-, designated VH32, showed limited growth on glucose with a specific growth rate (mu) of 0.03 h(-1), A low copy plasmid family was constructed containing E. coli galP and glk genes, individually or combined, under the control of a trc-derived promoter set. This plasmid family was used to transform the VH32 strain, each plasmid having different levels of expression of galP and glk. Experiments in minimal medium with glucose showed that expression of only galP under the control of a wild-type trc promoter resulted in a mu of 0.55 h(-1), corresponding to 89% of the mu measured for W3110 (0.62 h(-1)). In contrast, no increase in specific growth rate (mu) was observed in VH32 with a plasmid expressing only glk from the same promoter. Strains transformed with part of the plasmid family, containing both galP and glk genes, showed a mu value similar to that of W3110. Fermentor experiments with the VH32 strain harboring plasmids pv1Glk1GalP, pv4Glk5GalP, and pv5Glk5GalP showed that specific acetate productivity was twofold higher than in W3110. Introduction of plasmid pLOI1594, coding for pyruvate decarboxylase and alcohol dehydrogenase from Zymomonas mobilis, to strain VH32 carrying one of the plasmids with galP and g/l caused a twofold increase in ethanol productivity over strain W3110, also containing pLOI1594. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Morelos MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0006-3592 UR - ISI:000184544500007 L2 - glucose phosphotransferase transport system;phosphoenolpyruvate;ethanol;galactose permease;glucokinase;SUGAR MIXTURES; REGULATORY MUTATIONS; METABOLISM; STRAINS; PROTEIN; GENES; GLUCOSE-6-PHOSPHATE; POPULATIONS; EVOLUTION; PROMOTER SO - Biotechnology and Bioengineering 2003 ;83(6):687-694 8308 UI - 8941 AU - Hernandez-Montiel HL AU - Melendez-Herrera E AU - Cepeda-Nieto AC AU - Mejia-Viggiano C AU - Larriva-Sahd J AU - Guthrie S AU - Varela-Echavarria A AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Juriquilla 76230, Queretaro, MexicoUniv London Kings Coll, MRC, Ctr Dev Neurobiol, London SE1 1UL, EnglandVarela-Echavarria, A, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus UNAM UAQ, Juriquilla 76230, Queretaro, Mexico TI - Diffusible signals and fasciculated growth in reticulospinal axon pathfinding in the hindbrain AB - We have addressed the control of longitudinal axon pathfinding in the developing hindbrain, including the caudal projections of reticular and raphe neurons. To test potential sources of guidance signals, we assessed axon outgrowth from embryonic rat hindbrain explants cultured in collagen gels at a distance from explants of midbrain-hindbrain boundary (isthmus), caudal hindbrain, or cervical spinal cord. Our results showed that the isthmus inhibited caudally directed axon outgrowth by 80% relative to controls, whereas rostrally directed axon outgrowth was unaffected. Moreover, caudal hindbrain or cervical spinal cord explants did not inhibit caudal axons. Immunohistochemistry for reticular and raphe neuronal markers indicated that the caudal, but not the rostra] projections of these neuronal subpopulations were inhibited by isthmic explants. Companion studies in chick embryos showed that, when the hindbrain was surgically separated from the isthmus, caudal reticulospinal axon projections failed to form and that descending pioneer axons of the medial longitudinal fasciculus (MLF) play an important role in the caudal reticulospinal projection. Taken together, these results suggest that diffusible chemorepellent or nonpermissive signals from the isthmus and substrate-anchored signals on the pioneer MLF axons are involved in the caudal direction of reticulospinal projections and might influence other longitudinal axon projections in the brainstem. (C) 2003 Elsevier Science (USA). All rights reserved MH - United Kingdom MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000181577400007 L2 - axon guidance;axon pathfinding;hindbrain;isthmus;reticulospinal neurons;raphe neurons;inhibition, chemorepulsion, MLF;ANTERIOR HINDBRAIN; CHICKEN-EMBRYO; EXPRESSION; GENE; PROJECTIONS; PATTERNS; NEURONS; FGF8; RAT; ORGANIZATION SO - Developmental Biology 2003 ;255(1):99-112 8309 UI - 6670 AU - Hernandez-Rosas J AU - Picquart M AU - Haro-Poniatowski E AU - Kanehisa M AU - Jouanne M AU - Morhange JF AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Paris 06, Lab Phys Milieux Desordonnes & Heterogenes, CNRS, UMR 7603, F-75252 Paris 05, FrancePicquart, M, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Elastic vibrations of spheroidal nanometric particles AB - Particles of nanometric size show low-frequency vibrational modes that can be observed by Raman spectroscopy. These modes involve the collective motion of large numbers of atoms and it is possible to calculate their frequency using elasticity theory. In this work a simple model for oblate-shaped nanoparticles is developed and compared with experimental results obtained in bismuth nanoparticles. It is found that the agreement between theory and experiment is improved in comparison to the spherical model usually employed. However for the smallest particles the elastic model is no longer valid and lattice discreteness has to be considered MH - France MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000187281900010 L2 - FREQUENCY RAMAN-SCATTERING; SIZE; GLASSES; NANOCRYSTALS; MATRIX SO - Journal of Physics-Condensed Matter 2003 ;15(44):7481-7487 8310 UI - 7367 AU - Hernandez-Terrones MG AU - Aguilar MI AU - King-Diaz B AU - Lotina-Hennsen B AD - Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Farm, Fac Quim, Mexico City 04510, DF, MexicoUniv Fed Uberlandia, Inst Quim, BR-38400 Uberlandia, MG, BrazilLotina-Hennsen, B, Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Interference of methyl trachyloban-19-oate ester with CF0 of spinach chloroplast H+-ATPase AB - In isolated spinach chloroplasts, low concentrations (I-50 = 14 muM) of methyl trachyloban-19-oate ester inhibited ATP synthesis and coupled electron transport as well as light-activated membrane-bound Mg2+-ATPase activity. Basal (-Pi) and uncoupled electron transport and heat-activated Ca2+-dependent ATPase activity of isolated coupling factor proteins were unaffected by methyl trachyloban-19-oate. Thylakoids partially stripped of coupled factor by EDTA were unable to accumulate protons in the light. However, increasing concentrations of methyl trachyloban-19-oate ester restored this ability. It is concluded that the methyl trachyloban-19-oate ester effects result from blocking proton transport through the CF0 channel. Methyl trachyloban-19-oate ester exhibited non-competitive kinetics with DCCD and triphenyltin. These results suggest that the natural products, DCCD and triphenyltin, access inhibition sites in CF0. The K-i is 75 muM. (C) 2003 Elsevier Science (USA). All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0003-9861 UR - ISI:000185609700011 L2 - energy transfer inhibitor;CF0;H+-ATPase;methyl trachyloban-19-oate ester;photosynthesis;Iostephane heterophylla;ENZYMES CATALYZING PHOTOPHOSPHORYLATION; COUPLED ELECTRON TRANSPORT; PARTIAL RESOLUTION; HELIANTHUS-ANNUUS; PHOTOSYSTEM-II; PHOSPHORYLATION; INHIBITORS; SUNFLOWER; DITERPENES SO - Archives of Biochemistry and Biophysics 2003 ;418(1):93-97 8311 UI - 7482 AU - Hernandez-Terrones MG AU - Aguilar MI AU - King-Diaz B AU - Lotina-Hennsen B AD - Univ Nacl Autonoma Mexico, Fac Quim, Dpto Bioquim, Mexico City 04510, DF, MexicoUniv Fed Uberlandia, Inst Quim, BR-38400 Uberlandia, MG, BrazilUniv Nacl Autonoma Mexico, Dpto Farm, Mexico City 04510, DF, MexicoLotina-Hennsen, B, Univ Nacl Autonoma Mexico, Fac Quim, Dpto Bioquim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Inhibition of photosystem II in spinach chloroplasts by trachyloban-19-oic acid AB - The effect of trachyloban-19-oic acid isolated from Iostephane heterophylla (Asteraceae), was investigated on several photosynthetic activities in spinach thylakoids. The results indicated that this compound inhibited ATP synthesis and uncoupled electron transport, as well as basal and phosphorylating electron flow. Therefore, trachyloban-19-oic acid acts as Hill reaction inhibitor. This compound did not affect photosystem I activity but inhibited uncoupled photosystem 11 electron flow from H2O to DCPIP, and has not effect on electron flow from H2O to SiMo, indicating that the site of inhibition of this compound is at the level Of Q(A)-Q(B). Chlorophyll a fluorescence measurements confirm the behavior of this diterpene as Q(A)-Q(B) inhibitor, and in the other hand, this results indicate that a perturbation in the thylakoid membranes at the level of LHC II occurs. (C) 2003 Elsevier Science (USA). All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Entomology;Physiology U5 - J;Article AV - English IS - 0048-3575 UR - ISI:000185267500002 L2 - SIDERITIS-CANARIENSIS; DONOR SIDE; DITERPENES; ATPASE SO - Pesticide Biochemistry and Physiology 2003 ;77(1):12-17 8312 UI - 7552 AU - Hernandez-Urzua E AU - Mills CE AU - White GP AU - Contreras-Zentella ML AU - Escamilla E AU - Vasudevan SG AU - Membrillo-Hernandez J AU - Poole RK AD - Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, EnglandNatl Autonomous Univ Mexico, Inst Invest Biomed, Dept Biol Mol & Biotecnol, Lab Microbiol & Genet Mol, Mexico City 04510, DF, MexicoJames Cook Univ N Queensland, Dept Biochem & Mol Biol, Townsville, Qld 4811, AustraliaUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Bioquim, Mexico City 04510, DF, MexicoPoole, RK, Univ Sheffield, Dept Mol Biol & Biotechnol, Firth Court,Western Bank, Sheffield S10 2TN, S Yorkshire, England TI - Flavohemoglobin Hmp, but not its individual domains, confers protection from respiratory inhibition by nitric oxide in Escherichia coli AB - Escherichia coli possesses a two-domain flavohemoglobin, Hmp, implicated in nitric oxide ( NO) detoxification. To determine the contribution of each domain of Hmp toward NO detoxification, we genetically engineered the Hmp protein and separately expressed the heme (HD) and the flavin (FD) domains in a defined hmp mutant. Expression of each domain was confirmed by Western blot analysis. CO-difference spectra showed that the HD of Hmp can bind CO, but the CO adduct showed a slightly blue-shifted peak. Overexpression of the HD resulted in an improvement of growth to a similar extent to that observed with the Vitreoscilla heme-only globin Vgb, whereas the FD alone did not improve growth. Viability of the hmp mutant in the presence of lethal concentrations of sodium nitroprusside was increased (to 30% survival after 2 h in 5 mM sodium nitroprusside) by overexpressing Vgb or the HD. However, maximal protection was provided only by holo-Hmp (75% survival under the same conditions). Cellular respiration of the hmp mutant was instantaneously inhibited in the presence of 13.5 muM NO but remained insensitive to NO inhibition when these cells overexpressed Hmp. When HD or FD was expressed separately, no significant protection was observed. By contrast, overexpression of Vgb provided partial protection from NO respiratory inhibition. Our results suggest that, despite the homology between the HD from Hmp and Vgb (45% identity), their roles seem to be quite distinct MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000185164400030 L2 - HEMOGLOBIN-LIKE PROTEIN; BACTERIAL HEMOGLOBIN; ALCALIGENES-EUTROPHUS; FLAVOHAEMOGLOBIN HMP; OXIDATIVE STRESS; NITROSATIVE STRESS; OXYGEN-AFFINITY; CYTOCHROME-O; IN-VIVO; VITREOSCILLA SO - Journal of Biological Chemistry 2003 ;278(37):34975-34982 8313 UI - 8643 AU - Hernandez-Vergara MP AU - Rouse DB AU - Olvera-Novoa MA AU - Davis DA AD - Inst Tecnol Mar, Boca Del Rio 94290, Veracruz, MexicoAuburn Univ, Dept Fisheries & Allied Aquacultures, Auburn, AL 36849, USAIPN, Ctr Invest & Estud Avanzados, Unidad Merida, Merida 97310, Yucatan, MexicoHernandez-Vergara, MP, Inst Tecnol Mar, 1,Carr Veracruz Cordoba Km 12 AP 68, Boca Del Rio 94290, Veracruz, Mexico TI - Effects of dietary lipid level and source on growth and proximate composition of juvenile redclaw (Cherax quadricarinatus) reared under semi-intensive culture conditions AB - The influence of dietary lipid level on growth, survival, and proximate composition of juvenile redclaw crayfish was evaluated during a 12-week growth trial utilizing semi-intensive culture conditions. Four diets were formulated to be isoenergetic (17.58 kJ g(-1)) and iso-nitrogenous (30% crude protein). Three of the diets were designed to contain 4.2% (L4), 8.2% (L8) and 12.3% (L12) lipid in a 1:1 ratio of corn oil/fish oil. A fourth diet was formulated to contain 8.7% (LC8) lipid, with corn oil as lipid supplement. A fifth treatment (UF) was included in which the redclaw were not fed in order to estimate the contribution of primary production. Juvenile redclaw (4.08 +/- 0.2 g initial weights) were stocked at a density of 10 per tank in 15, 2.5-m(3) fiberglass tanks with three replicates per treatment. The trial was conducted in an outdoor flow-through water system. The redclaw in the unfed treatment gained 8.3 g whereas redclaw that received a prepared ration gained an average of 31.9 g. Hence, in this experiment natural productivity contributed about 26% of the weight gain of the redclaw maintained in outdoor tanks. Among the fed treatments, there were no significant differences in survival, final weight, growth, or feed utilization. The hepatosomatic index (HI) generally increased with lipid level and was influenced by the sex of the redclaw. Results indicated that in similar culture conditions, diets containing 4% lipid are sufficient for redclaw growth and survival when natural food is present. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Veracruz MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000182488200008 L2 - Cherax quadricarinatus;lipid;nutrition;redclaw;culture;VON-MARTENS DECAPODA; DESTRUCTOR CLARK; POND PRODUCTION; EARTHEN PONDS; CRAYFISH; PARASTACIDAE; WATER; SURVIVAL; STOCKING SO - Aquaculture 2003 ;223(1-4):107-115 8314 UI - 8207 AU - Hernandez A AU - Seijo JC AD - Univ Delaware, Coll Marine Studies, Newark, DE 19716, USAUniv Marista Merida, Merida, Yucatan, MexicoHernandez, A, Univ Delaware, Coll Marine Studies, 011 Robinson Hall, Newark, DE 19716 USA TI - Spatial distribution analysis of red grouper (Epinephelus morio) fishery in Yucatan, Mexico AB - Statistical analysis of the red grouper (Epinephelus morio) fishery in the Yucatan continental shelf indicates that this species follows a constant pattern of spatial distribution through time. Using time series of relative abundance from 1984 to 2001 (commercial CPUE) by month and fishing area, red grouper distribution was addressed by means of serial correlation and ANOVA parametric tests. These methods showed that during each year, red grouper spatial distribution is significantly different in January and February. This period is characterized by the highest abundance, particularly in the fishing areas located at the eastern part of the continental shelf. The implementation of time or area closures to rebuild the stock should involve these findings in the analysis in order to determine the impact on the fishery. (C) 2003 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000183604300011 L2 - Epinephelus morio;spatial analysis;distribution;abundance SO - Fisheries Research 2003 ;63(1):135-141 8315 UI - 7635 AU - Hernandez E AU - Meunier V AU - Smith BW AU - Rurali R AU - Terrones H AU - Nardelli MB AU - Terrones M AU - Luzzi DE AU - Charlier JC AD - CSIC, ICMAB, Oak Ridge, TN 37831, USAOak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831, USAUniv Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104, USACSIC, CNM, Barcelona 08193, SpainIPICYT, Adv Mat Dept, San Luis Potsosi 78210, MexicoN Carolina State Univ, Dept Phys, Raleigh, NC 27695, USAUniv Catholique Louvain, PCPM & CERMIN, B-1348 Louvain, BelgiumTerrones, M, CSIC, ICMAB, Campus Bellaterra, Oak Ridge, TN 37831, USA TI - Fullerene coalescence in nanopeapods: A path to novel tubular carbon AB - A fascinating structural transformation occurring inside single-walled carbon nanotubes (SWNTs) is the fullerene coalescence, which is responsible for forming stable zeppelinlike carbon molecules. We report in situ transmission electron microscope (TEM) observations revealing sequences of fullerene coalescence induced by electron irradiation on pristine nanotube peapods, together with extensive theoretical investigations of the microscopic mechanism underlying this process. TEM images indicate that the merging of fullerenes results in stable but corrugated tubules (5 to 7 Angstrom in diameter) confined within SWNTs. These observations have been confirmed using a combination of theoretical approaches based on molecular dynamics, empirical potentials, tight-binding methods, Monte Carlo techniques, and first principles calculations. We have fully elucidated the coalescence mechanism of fullerenes inside SWNTs under electron irradiation and thermal annealing. The process occurs via the polymerization Of C-60 molecules followed by surface reconstruction, which can be triggered either by the formation of vacancies (created under electron irradiation) or by surface-energy minimization activated by thermal annealing. These novel tubular forms of carbon contain hexagons, pentagons, heptagons, and octagons. The stability, electronic properties, and electron conductance of the novel tubules are strongly affected by the final geometry of the coalesced fullerene complex. The possibility of forming highly conducting and semiconducting tubular structures suggests new avenues in designing carbon nanowires with specific electronic characteristics MH - Belgium MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 55 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000184892400010 L2 - ELECTRON-IRRADIATION; MOLECULAR-DYNAMICS; ENCAPSULATED C-60; NANOTUBES; SUPERCONDUCTIVITY; MECHANISM SO - Nano Letters 2003 ;3(8):1037-1042 8316 UI - 8060 AU - Hernandez JM AU - Gasca-Leyva E AU - Leon CJ AU - Vergara JM AD - Univ Las Palmas Gran Canaria, Dept Quantitat Methods, Las Palmas Gran Canaria 35017, SpainIPN, Ctr Invest & Estud Avanzados, Merida 97310, Yucatan, MexicoUniv Las Palmas Gran Canaria, Dept Appl Econ Anal, Las Palmas Gran Canaria 35017, SpainUniv Las Palmas Gran Canaria, Dept Biol, Las Palmas Gran Canaria 35017, SpainHernandez, JM, Univ Las Palmas Gran Canaria, Dept Quantitat Methods, C-Saulo Toron S-N, Las Palmas Gran Canaria 35017, Spain TI - A growth model for gilthead seabream (Sparus aurata) AB - This paper presents a growth model for gilthead seabream (Sparus aurata), which is one of the most culture species in the Mediterranean area. The model is designed by means of stochastic differential equations, and is based on previous research for other species [Modelisation de la Croissance des Poissons en Elevage, 1990]. Fish growth is assumed to be influenced by three fundamental factors: fish weight, water temperature, and ration size. The formulation incorporates fish physiology theory, requiring fewer specific parameters than other bionenergetic models. Empirical data were obtained from culture in the Canary Islands waters for a 30-month period. Some simulations were run to validate the model. Although the influence of water temperature on fish growth might need to be refined, satisfactory results are obtained. Two environmental scenarios are also examined, the "Atlantic" and "Mediterranean," which vary in the annual cycles of water temperature. The results produce significant differences in the growth patterns between both areas, suggesting potential economic implications for the cultivation of larger commercial sizes. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Yucatan MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000183969400010 L2 - gilthead seabream;fish growth;dynamical system;validation;simulation;SIMULATION-MODEL; FISH; AQUACULTURE; DYNAMICS; SYSTEM; CULTURE; RATION; SALMON; CALIBRATION; TEMPERATURE SO - Ecological Modelling 2003 ;165(2-3):265-283 8317 UI - 8904 AU - Hernandez L AU - Rivera-Alvarez Z AU - Hernandez-Ramirez LM AU - Hernandez-Calderon I AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv La Habana, Fac Fis, Havana 10400, CubaHernandez-Calderon, I, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Persistent photoconductivity in ZnCdSe MBE films grown on GaAs AB - The effect of persistent photoconductivity (PPC) and their associated deep centers have been studied for Zn1-xCdxSe (0.10 < x < 0.26) alloys grown by molecular beam epitaxy on GaAs substrates. Low temperature photoexcitation showed a prominent PPC effect with an exponential temperature dependence of the characteristic of the carrier decay time and an energy barrier which changes with Cd concentration. Experiments of thermally stimulated currents indicated that the PPC effect may be associated to deep electron traps levels whose activation energies are a function of the Cd concentration. (C) 2002 Published by Elsevier Science Ltd MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000181539300026 L2 - ZnCdSe/GaAs heterojunction;persistent photoconductivity;TSC;DX center;DX CENTERS; LASER-DIODES; CL SO - Solid-State Electronics 2003 ;47(4):759-762 8318 UI - 8038 AU - Hernandez MJ AU - Barradas I AD - Cent Univ Venezuela, Fac Ciencias, Inst Zool Trop, Lab Biol Teor, Caracas 1041A, VenezuelaCtr Invest Matemat CIMAT, Guanajuato, Gto, MexicoHernandez, MJ, Cent Univ Venezuela, Fac Ciencias, Inst Zool Trop, Lab Biol Teor, Apartado Postal 47058, Caracas 1041A, Venezuela TI - Variation in the outcome of population interactions: bifurcations and catastrophes AB - The nature of the association between two species may vary depending on population abundances, age or size of individuals, or environmental conditions. Interactions may switch between beneficial and detrimental depending on the net balance of costs and benefits involved for each species. We study the repercussion of the ecological setting on the outcomes of conditional or variable interactions by means of a model that incorporates density-dependent interaction coefficients; that is, interaction alpha-functions. These characterize the responsiveness and sensitivity of the association to changes in partner's abundance, and can take positive and negative values. Variable outcomes - and transitions between them - are categorized as homeo- or allo-environmental, that is, occurring under the same ecological setting, or not, respectively. Bifurcation analyses show that these dynamics are moulded by ecological factors that are: intrinsic to the nature of the association ( concerning the sensitivity of the interaction), and extrinsic to the association itself ( the quality of the environment referred to each species alone). The influence of these factors may be conflicting; consequently, the dynamics involve catastrophic events. In a facultative variable association, stable coexistence is expected when environmental conditions are adverse; otherwise, the exclusion of one species is the likely outcome. Remarkable situations as the switching of victim-exploiter roles illustrate the theoretical perspective MH - Mexico|Guanajuato MH - Venezuela PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0303-6812 UR - ISI:000183778000005 L2 - variable population interactions;conditional interactions;costs and benefits;density dependent interaction coefficient hysteresis;symbiosis;mutualism;parasitism;ANT ASSOCIATION; CONDITIONAL OUTCOMES; MUTUALISM; COMMUNITIES; STABILITY; DYNAMICS; APHIDS; MODELS SO - Journal of Mathematical Biology 2003 ;46(6):571-594 8319 UI - 6944 AU - Hernandez T AU - Gomez I AU - Greneche JM AU - Plazaola F AU - Barandiaran JM AD - UANL, Fac Ciencias Quim, Sn Nicolas De Los Garza, NL, MexicoUniv Maine, UMR CNRS 6087, Lab Phys Etat Consense, Le Mans, FranceUPV, Fac Ciencias Leioa, Dept Elect & Elect, Bilbao, SpainHernandez, T, UANL, Fac Ciencias Quim, Sn Nicolas De Los Garza, NL, Mexico TI - Magnetic properties and Mossbauer spectroscopy in Sr-2(Fe1-xScx)ReO6 (x=0.05, 0.1) double perovskite compounds AB - We have synthesised by the modified Pechini method the following polycrystalline double perovskite samples: Sr2Fe1-xScxReO6 (x = 0.05, 0.1). They have been characterised by X-ray, magnetic measurements and Mossbauer spectrometry. X-ray patterns showed that the double perovskites are well crystallized. The difference in size between Fe3+ and Sc3+ atomic radii does not cause large structural changes in compared to the parent Sr2FeReO6 compound. The Curie temperatures are found at 426 and 435 (+/-5) K for Sr2Fe0.95Sc0.05ReO6 and Sr2Fe0.9Sc0.1ReO6 respectively. The Mossbauer spectra measured at 77 K showed a complex hyperfine structure which result from different magnetic contributions at Fe sites, the average hyperfine field was estimated 50 T and the isomer shift at 0.5 mm/s consequently the iron ions stay in a trivalent state MH - France MH - Mexico|Nuevo Leon MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000186485800009 L2 - magnetoresistance;ferrimagnetic;Mossbauer spectroscopy;double perovskites;DIFFRACTION; SR2FEMOO6; CRYSTAL; BA; CA; SR SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2003 ;42(5):317-321 8320 UI - 8884 AU - Herrera-Campos MDL AU - Lucking R AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoField Museum Nat Hist, Dept Bot, Chicago, IL 60605, USAHerrera-Campos, MDL, Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Cd Univ,CP, Mexico City 04510, DF, Mexico TI - The foliicolous lichen flora of Mexico II. New species from the montane forest in Oaxaca and Puebla AB - Five new species of foliicolous lichens are described from the montane forest in the States of Oaxaca and Puebla of Mexico. All new taxa belong to the family Gomphillaceae (Ostropales): Gyalectidium nashii sp. nov., G. paolae sp. nov., G. rosae-emiliae sp. nov., Gyalideopsis applanata sp. nov. (also known from Costa Rica and Guyana), and Tricharia oaxacae sp. nov. In addition, pycnidia are described for Fellhanera naevia (Vain.) Lucking & Caceres, and diahyphae for Tricharia subalbostrigosa Lucking MH - Mexico|Distrito Federal MH - USA PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000181842200001 SO - Bryologist 2003 ;106(1):1-8 8321 UI - 6505 AU - Herrera-Ulloa AF AU - Charles AT AU - Lluch-Cota SE AU - Ramirez-Aguirre H AU - Hernandez-Vazquez S AU - Ortega-Rubio AF AD - CIBNOR, La Paz 23090, BCS, MexicoSt Marys Univ, Halifax, NS B3H 3C3, CanadaUniv Autonoma Baja California Sur, La Paz, Baja California, MexicoOrtega-Rubio, AF, CIBNOR, Mar Bermejo 195,Col Playa Palo de Santa Rita,AP 1, La Paz 23090, BCS, Mexico TI - A regional-scale sustainable development index: the case of Baja California Sur, Mexico AB - Sustainable development, as a multi-dimensional concept, is difficult to measure. Some efforts using indicators and indices have appeared in recent years, but most were developed on a national scale. Use of sustainability indicators has proven valuable for attaining better management of the environment by minimizing information gaps and maximizing community capabilities in terms of economic, social, environmental, and institutional sustainability dimensions. However, at least in the case of developing countries, the potential exists that national sustainability measures, based on national-level indicators, may mask problems in sub-national zones with highly unsustainable conditions. This paper proposes a methodology to evaluate sustainable development at a local level, the use of which Could be helpful in comparing different regions within a country or even among different countries. National sustainability indicators should result from a combination (whether additive or proportional) of regional sustainability indicators, as developed in this paper MH - Canada MH - Mexico|Baja California MH - Mexico|Baja California Sur PB - LANCASTER: PARTHENON PUBLISHING GROUP RP - NOT IN FILE U3 - TC 1 U4 - Ecology U5 - J;Article AV - English IS - 1350-4509 UR - ISI:000188047700006 L2 - sustainability;sustainable development;sustainability indicators;sustainability measurement;multivariable statistic;INDICATORS SO - International Journal of Sustainable Development and World Ecology 2003 ;10(4):353-360 8322 UI - 8867 AU - Herrera A AU - Tellez-Luis SJ AU - Ramirez JA AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainUAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Cmapus Lugo, Lugo 27002, Spain TI - Production of xylose from sorghum straw using hydrochloric acid AB - Xylose is a hemicellulosic sugar mainly used for its bioconversion to xylitol. Sorghum straw is a raw material for xylose production that has been studied scarcely. The objective of this work was to study the xylose production by hydrolysis of sorghum straw with hydrochloric acid at 122degreesC. Several concentrations of HCl (2-6%) and reaction time (0-300 min) were evaluated. Kinetic parameters of mathematical models for predicting the concentration of xylose, glucose, acetic acid and furfural in the hydrolysates were found. Optimal conditions for hydrolysis were 6% HCl at 122degreesC for 70 min, which yielded a solution with 16.2 g xylose/L, 3.8 g glucose/L, 2.0 g furfural/L and 1.9 g acetic acid/L. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0733-5210 UR - ISI:000181705200002 L2 - xylose;sorghum;straw;modelling;acid hydrolysis;PINUS-PINASTER WOOD; HEMICELLULOSIC FRACTION; PHAFFIA-RHODOZYMA; PREHYDROLYSIS; AUTOHYDROLYSIS; TECHNOLOGY; HYDROLYSIS; BIOMASS; XYLITOL SO - Journal of Cereal Science 2003 ;37(3):267-274 8323 UI - 9025 AU - Herrera JR AU - Peralta RD AU - Lopez RG AU - Cesteros LC AU - Mendizabal E AU - Puig JE AD - Ctr Invest & Quim Aplicada, Saltillo 25000, Coahuila, MexicoUniv Pais Vasco, Grp Nuevos Mat, Dept Quim Fis, Bilbao 48990, SpainUniv Guadalajara, Dept Quim, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoPeralta, RD, Ctr Invest & Quim Aplicada, Boul Ing,Enrique Reyna Hermosillo 140, Saltillo 25000, Coahuila, Mexico TI - Cosurfactant effects on the polymerization of vinyl acetate in anionic microemulsion media AB - The polymerization of vinyl acetate at 60 degreesC in microemulsions stabilized with the anionic surfactant, Aerosol OT, with or without cosurfactant (n-butanol) is examined. Partial phase diagrams at 60 degreesC show that the addition of n-butanol enhances the one-phase microemulsion region. Results indicate that the reaction rate is not affected by the presence of the alcohol. However, average molar masses are smaller although particles are bigger throughout the reaction compared to those values obtained in the absence of n-butanol. An explanation for these results is presented. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Mexico|Jalisco MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000181260900003 L2 - vinyl acetate polymerization;cosurfactant effects;nanoparticles;3-COMPONENT CATIONIC MICROEMULSIONS; FREE-RADICAL POLYMERIZATION; MICRO-EMULSION SYSTEMS; METHYL-METHACRYLATE; STYRENE POLYMERIZATION; RAMAN-SPECTROSCOPY; WATER; KINETICS; LATEX SO - Polymer 2003 ;44(6):1795-1802 8324 UI - 7682 AU - Herrera LG AU - Hobson KA AU - Rodriguez M AU - Hernandez P AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Saskatchewan, Dept Biol, Saskatoon, SK S7N 0X4, CanadaHerrera, LG, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Trophic partitioning in tropical rain forest birds: insights from stable isotope analysis AB - Bird communities reach their highest taxonomic and trophic diversity in tropical rain forest, but the use of different foraging strategies to meet food requirements in such competitive environments is poorly understood. Conventional dietary analyses are poorly suited to investigate dietary patterns in complex systems. We used stable carbon (C-13/C-12) and nitrogen (N-15/N-14) isotope analysis of whole blood to examine avian trophic patterns and sources of diet in the tropical rain forest of Los Tuxtlas, Veracruz, Mexico. We used stable nitrogen isotope analysis to delineate trophic levels, and stable carbon isotope analysis to distinguish the relative contribution of C-3 and CAM/C-4 ultimate sources of proteins to diets. There was large inter- and intraspecific variation in whole blood delta(13)C and delta(15)N values in 23 species of birds. Stable nitrogen isotope analysis separated birds into several trophic levels, including species that obtained their dietary protein mostly from plants, insects or a combination of both food sources. Stable carbon isotope analysis showed that most birds fed on C3-based foods but Stub-tailed Spadebills (Platyrinchus cancrominus) included C-3- and C-4/CAM-specialist individuals. Our analyses provided insights into the nutritional contribution of plant and animal sources of protein and distinguish their photosynthetic origin over relatively long average time periods MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Ecology U5 - J;Article AV - English IS - 0029-8549 UR - ISI:000184756000013 L2 - nutritional ecology;protein requirements;rain forest;stable isotope analysis;tropical birds;FRUIT-EATING BIRDS; LOS-TUXTLAS; FRUGIVOROUS BATS; SEASONAL-CHANGES; FOOD PLANTS; DIETS; DISPERSAL; NITROGEN; MEXICO; DELTA-C-13 SO - Oecologia 2003 ;136(3):439-444 8325 UI - 6249 AU - Hess PO AU - Misicu S AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, GermanyNatl Inst Nucl Phys, Bucharest, RomaniaHess, PO, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior,CU,Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Potential energy surfaces and spectra of superheavy elements AB - The potential energy surfaces of some superheavy nuclei are determined, using a mapping from the microscopic shell model space to a geometrical model. The content of the shell model space is determined through the knowledge of the absolute deformation and a single-particle spectrum as a function of deformation. Both have to be extracted from a microscopic model. We show that one cannot restrict to only prolate or oblate deformations because the content of the microscopic space already implies triaxiality. Also cases of gamma instability occur. The mass parameter of No-254 is determined through the knowledge of at least one rotational state of the ground-state band. Assuming the same mass parameter for the other superheavy elements, the spectrum of each of them is determined. The following superheavy nuclei are considered: No-254, (260)Rf, (262)Sg, (270)Hs, (274)110(Ds), (276)112, and (290)114, where (260)Rf and (262)Sg turn out to be gamma unstable MH - Germany MH - Mexico|Distrito Federal MH - Romania PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000188769500015 L2 - NUCLEAR SHELL MODEL; COLLECTIVE MODEL; MIXED CONFIGURATIONS; SYMPLECTIC MODEL; STATE; NO-254; MOTION; ISOTOPES; SCHEMES; BEAM SO - Physical Review C 2003 ;68(6): 8326 UI - 6511 AU - Heyman DP AU - Lucantoni D AD - DLT Consulting LLC, Ocean, NJ 07712, USAHeyman, DP, 101 Lindy Lane, Mexico City 07738, DF, Mexico TI - Modeling multiple IP traffic streams with rate limits AB - We start with the premise, and provide evidence that it is valid, that a Markov-modulated Poisson process (MMPP) is a good model for Internet traffic at the packet/byte level. We present an algorithm to estimate the parameters and size of a discrete MMPP (D-MMPP) from a data trace. This algorithm requires only two passes through the data. In tandem-network queueing models, the input to a downstream queue is the output from an upstream queue, so the arrival rate is limited by the rate of the upstream queue. We show how to modify the MMPP describing the arrivals to the upstream queue to approximate this effect. To extend this idea to networks that are not tandem, we show how to approximate the superposition of MMPPs without encountering the state-space explosion that occurs in exact computations. Numerical examples that demonstrate the accuracy of these methods are given. We also present a method to convert our estimated D-MMPP to a continuous-time MMPP, which is used as the arrival process in a matrix-analytic queueing model MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 12 U4 - Computer Science, Hardware & Architecture;Computer Science, Theory & Methods;Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1063-6692 UR - ISI:000187897700008 L2 - hidden Markov model;Markov-modulated Poisson process (MMPP);matrix-analytic queueing model;super-position;tandem queues;MODULATED POISSON PROCESSES SO - Ieee-Acm Transactions on Networking 2003 ;11(6):948-958 8327 UI - 9259 AU - Hidalgo-Gamez AM AU - Sanchez-Salcedo FJ AU - Olofsson K AD - Astron Observ, S-75120 Uppsala, SwedenUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoHidalgo-Gamez, AM, Inst Politecn Nacl, Mexico City, DF, Mexico TI - The metallicity-luminosity relationship of dwarf irregular galaxies - II. A new approach AB - The nature of a possible correlation between metallicity and luminosity for dwarf irregular galaxies, including those with the highest luminosities, has been explored using simple chemical evolutionary models. Our models depend on a set of free parameters in order to include infall and outflows of gas and covering a broad variety of physical situations. Given a fixed set of parameters, a non-linear correlation between the oxygen abundance and the luminosity may be established. This would be the case if an effective self-regulating mechanism between the accretion of mass and the wind energized by the star formation could lead to the same parameters for all the dwarf irregular galaxies. In the case that these parameters were distributed in a random manner from galaxy to galaxy, a significant scatter in the metallicity-lummosity diagram is expected. Comparing with observations, we show that only variations of the stellar mass-to-light ratio are sufficient to explain the observed scattering and, therefore, the action of a mechanism of self-regulation cannot be ruled out. The possible origin of discrepancies in the metallicity-lummosity correlation found by different authors is discussed MH - Mexico|Distrito Federal MH - Sweden PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000180827300012 L2 - ISM : abundances;galaxies : dwarf;galaxies : ISM;galaxies : irregular;STAR-FORMATION HISTORY; BLUE COMPACT GALAXIES; OXYGEN ABUNDANCES; CHEMICAL EVOLUTION; STELLAR POPULATIONS; GALACTIC DISKS; REGIONS; PHOTOMETRY; GAS; STARBURST SO - Astronomy & Astrophysics 2003 ;399(1):63-76 8328 UI - 7592 AU - Hijar M AU - Trostle JA AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoTrinity Coll, Hartford, CT 06106, USAHijar, M, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, Mexico TI - Traffic law enforcement and safety MH - Mexico|Morelos MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 3 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0140-6736 UR - ISI:000185188500034 SO - Lancet 2003 ;362(9386):833-833 8329 UI - 9129 AU - Hildebrand R AD - Royal Inst Technol, KTH, MWL, Dept Vehicle Engn, SE-10044 Stockholm, SwedenHildebrand, R, Inst Mexicano Transporte, Apartado Postal 1098, Sanfandila, Qro, Mexico TI - Asymptotic analysis of hard wave barriers in soil AB - A simple analytical model is developed to predict the vibration isolation of a hard wave barrier (e.g. filled trench, screen of piles, etc.). The model is, moreover, restricted to asymptotic conditions of high frequencies and soft soils. While the soil's surface wavelength is therefore short, barrier hardness' implies much longer wavelengths downward along the barrier itself. These conditions permit a number of approximations: the distributed excitation of the barrier by the surface waves is replaced by a concentrated force; the energy passing underneath the barrier is ignored in favor of that re-radiated by the barrier motion itself; and that radiation is approximated as if the barrier were rigid and semi-infinite. Subsurface soil-barrier interaction is accounted for in the barrier dynamic stiffness; both single degree-of-freedom and flexible models are considered. Successful comparisons are,made to numerical results from the literature, as well as field measurements near a railway track. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - Sweden PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0267-7261 UR - ISI:000181023400005 L2 - vibration isolation;wave barrier;lime-cement columns;structure-borne sound;railway vibration;filled trench;VERTICAL RAIL VIBRATIONS; GROUND VIBRATION; TRENCHES; EXCITATION; REDUCTION; DESIGN; TRAINS; BEM SO - Soil Dynamics and Earthquake Engineering 2003 ;23(2):143-158 8330 UI - 7893 AU - Hilgert N AU - Hernandez-Lerma O AD - INRA, ENSA M, Lab Anal Syst & Biometrie, F-34060 Montpellier, FranceInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoHilgert, N, INRA, ENSA M, Lab Anal Syst & Biometrie, 2 Pl Viala, F-34060 Montpellier, France TI - Bias optimality versus strong 0-discount optimality in Markov control processes with unbounded costs AB - This paper deals with expected average cost (EAC) and discount-sensitive criteria for discrete-time Markov control processes on Borel spaces, with possibly unbounded costs. Conditions are given under which (a) EAC optimality and strong -1-discount optimality are equivalent; (b) strong 0-discount optimality implies bias optimality; and, conversely, under an additional hypothesis, (c) bias optimality implies strong 0-discount optimality. Thus, in particular, as the class of bias optimal policies is nonempty, (c) gives the existence of a strong 0-discount optimal policy, whereas from (b) and (c) we get conditions for bias optimality and strong 0-discount optimality to be equivalent. A detailed example illustrates our results MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000184411900001 L2 - Markov control processes;Borel state space;average cost;bias optimality;strong 0-discount optimality;DECISION CHAINS; POLICIES; SYSTEMS SO - Acta Applicandae Mathematicae 2003 ;77(3):215-235 8331 UI - 6752 AU - hluwalia-Khalilova DV AU - Dymnikova I AD - Univ Zacatecas, Dept Math, Ctr Studies Phys Math & Biol Struct Universe, Zacatecas 98062, ZAC, MexicoUniv Warmia & Mazury, Dept Math & Comp Sci, PL-10561 Olsztyn, PolandAhluwalia-Khalilova, DV, Univ Zacatecas, Dept Math, Ctr Studies Phys Math & Biol Struct Universe, Ap Postal C-600, Zacatecas 98062, ZAC, Mexico TI - A theoretical case for negative mass-square for sub-eV particles AB - Electroweak gauge bosons have masses of the order of 10(2) GeV [/c(2)], while masses of additional bosons involved in gravito-electroweak unification are expected to be still higher. These are at least eleven orders of magnitude higher than sub-eV range indica, tions for neutrino masses. Under these circumstances we suspect that the sub-eV particles are created in a spacetime where gravitational effects of massive gauge bosons may become important. The question that we thus ask is: What is the spacetime group around a gravito-electroweak vertex? Modeling it as de-Sitter we find that sub-eV particles may carry a negative mass square of the order of -(3/8pi(3))(M-unif./M-Planck)(4) M-Planck(2). Neutrino oscillation data then hints at 30-75 TeV scale for M-unif., where M-unif. characterizes gravito-electroweak unification scale MH - Mexico|Zacatecas MH - Poland PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000187026000032 L2 - TRITIUM BETA-DECAY; SURFACE MUON BEAM; NEUTRINO MASS; MOLECULAR TRITIUM; UPPER LIMIT; END-POINT; SPECTRUM; MOMENTUM; PHYSICS; SEARCH SO - International Journal of Modern Physics D 2003 ;12(9):1787-1794 8332 UI - 8727 AU - Hojat M AU - Gonnella JS AU - Nasca TJ AU - Fields SK AU - Cicchetti A AU - Lo Scalzo A AU - Taroni F AU - Amicosante AMV AU - Macinati M AU - Tangucci M AU - Liva C AU - Ricciardi G AU - Eidelman S AU - Admi H AU - Geva H AU - Mashiach T AU - Alroy G AU - corta-Gonzalez A AU - Ibarra D AU - Torres-Ruiz A AD - Thomas Jefferson Univ, Jefferson Med Coll, Ctr Res Med Educ, Philadelphia, PA 19107, USANatl Inst Neurol & Neurosurg Manuel Velasco Suare, Mexico City, DF, MexicoMexican Inst Social Secur, Mexico City, DF, MexicoAutonomous Univ Nuevo Leon, Sch Med, Monterrey, MexicoTechnion Israel Inst Technol, Fac Med, Haifa, IsraelTechnion Israel Inst Technol, Rambam Med Ctr, Haifa, IsraelASSR, Agenzia Serv Saitari Reg, Natl Agcy Reg Hlth Serv, Rome, ItalyCatholic Univ Rome, Inst Hyg, Hlth Econ Lab, Rome, ItalyHojat, M, Thomas Jefferson Univ, Jefferson Med Coll, Ctr Res Med Educ, 1025 Walnut St, Philadelphia, PA 19107 USA TI - Comparisons of American, Israeli, Italian and Mexican physicians and nurses on the total and factor scores of the Jefferson scale of attitudes toward physician-nurse collaborative relationships AB - This cross-cultural study was designed to compare the attitudes of physicians and nurses toward physician-nurse collaboration in the United States, Israel, Italy and Mexico. Total participants were 2522 physicians and nurses who completed the Jefferson Scale of Attitudes Toward Physician-Nurse Collaboration (15 Likert-type items, (Hojat et al., Evaluation and the Health Professions 22 (1999a) 208; Nursing Research 50 (2001) 123). They were compared on the total scores and four factors of the Jefferson Scale (shared education and team work, caring as opposed to curing, nurses, autonomy, physicians' dominance). Results showed inter- and intra-cultural similarities and differences among the study groups providing support for the social role theory (Hardy and Conway, Role Theory: Perspectives for Health Professionals, Appelton-Century-Crofts, New York, 1978) and the principle of least interest (Waller and Hill, The Family: A Dynamic Interpretation, Dryden, New York, 1951) in inter-professional relationships. Implications for promoting physician-nurse education and inter-professional collaboration are discussed. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Nursing U5 - J;Article AV - English IS - 0020-7489 UR - ISI:000182175200010 L2 - physician-nurse collaboration;social roles;cultural norms;attitudes;principle of least interest;American;Israeli;Italian;Mexican;HEALTH-CARE SYSTEM; CASE-MANAGEMENT; INTENSIVE-CARE; PERCEPTIONS; QUALITY; SATISFACTION; EDUCATION; SITUATION; OUTCOMES; UNIT SO - International Journal of Nursing Studies 2003 ;40(4):427-435 8333 UI - 8923 AU - Holechek J AU - Galt D AU - Joseph J AU - Navarro J AU - Kumalo G AU - Molinar F AU - Thomas M AD - New Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003, USANew Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003, USAUniv Juarez, Ctr Biol Studies, Chihuahua, MexicoNew Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003, USAHolechek, J, New Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003 USA TI - Moderate and light cattle grazing effects on Chihuahuan Desert rangelands AB - Vegetation changes were evaluated over a 13 year period (1988-2000) on moderately grazed and lightly grazed rangelands in the Chihuahuan Desert of south central New Mexico. During the study period, grazing use of primary forage species averaged 49 and 26% on moderately and lightly grazed rangelands, respectively. Autumn total grass and black grama (Bouteloua eriopoda Torr.) standing crop were consistently higher on the lightly than moderately grazed rangeland throughout the study. Total grass standing crop declined on the moderately grazed rangeland when the last 3 years of study were compared to the first 3 years (10 versus 124 kg ha(-1)), but showed no change on the lightly grazed rangeland (320 versus 357 kg ha(-1)). Black grama, the primary perennial grass in the Chihuahuan Desert, increased in autumn standing crop on the lightly grazed rangeland, but decreased on the moderately grazed rangeland. Dropseed (Sporobolus spp.) autumn standing crop decreased on both rangelands during the study. However, this decrease was greater on the moderately grazed rangeland (97% decline) than on the lightly grazed rangeland (67% decline). Perennial grass survival following a 3-year period of below average precipitation was higher on the lightly grazed (51%) than the moderately grazed rangeland (11%). Severe grazing intensities on the moderately grazed rangeland during the dry period (1994-1996) appear to explain differences in grass survival between these 2 rangelands. Our study and several others show that light to conservative grazing intensities involving about 25-35% use of key forage species can promote improvement in rangeland ecological condition in the Chihuahuan Desert, even when accompanied by drought MH - Mexico|Chihuahua MH - USA PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 0022-409X UR - ISI:000181520400004 L2 - stocking rate;and lands;livestock;range management;NEW-MEXICO; VEGETATION SO - Journal of Range Management 2003 ;56(2):133-139 8334 UI - 7561 AU - Holguin F AU - Tellez-Rojo MM AU - Hernandez M AU - Cortez M AU - Chow JC AU - Watsow JG AU - Mannino D AU - Romieu I AD - Emory Univ, Sch Med, Atlanta, GA, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoHosp ABC, Mexico City, DF, MexicoUniv Nevada, Desert Res Inst, Reno, NV 89506, USACtr Dis Control & Prevent, Atlanta, GA, USAHolguin, F, Emory Univ, Sch Med, Grady Mem Hosp, Suite 2C007,80 Jesse Hill Jr Dr, Atlanta, GA 30335 USA TI - Air pollution and heart rate variability among the elderly in Mexico City AB - Background: Suspended particles and ozone have been associated with varying degrees of cardiac autonomic dysfunction. Methods: In Mexico City, residents from a nursing home underwent heart rate variability analysis every other day for 3 months. Indoor and outdoor PM2.5 (particulate matter less than 2.5 mm in diameter) were measured daily at the nursing home. Levels of ozone and other atmospheric pollutants were obtained from a nearby automated monitoring station. Results: Of the initial 42 screened participants, 34 (81%) were followed during the study period. The 24-hour average levels of indoor PM2.5 ranged from 15 to 67 mug/m(3), and outdoor PM2.5 ranged from 9 to 87 mug/m(3). Daily 1-hour maximum ozone levels ranged from 47 to 228 ppb. After adjusting for age and heart rate, we observed a strong decrease in the high frequency component of heart rate variability and the average 24-hour concentrations of PM2.5. Participants with hypertension had considerably larger reductions in their HF-HRV (high frequency-heart rate variability) component in relation to both ozone and PM2.5 exposure. Conclusions: Our results suggest that ambient levels of PM2.5 and ozone can reduce the high-frequency component of heart rate variability in elderly subjects living in Mexico City and that subjects with underlying hypertension are particularly susceptible to this effect MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 44 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1044-3983 UR - ISI:000185132900005 L2 - particulate air pollution;ozone;heart rate variability;Mexico;elderly;ENVIRONMENTAL EXPOSURE; PARTICULATE; MORTALITY; RISK; ASSOCIATION; RECORDINGS; PARTICLES; HEALTH; COHORT SO - Epidemiology 2003 ;14(5):521-527 8335 UI - 7760 AU - Holguin G AU - Glick BR AD - CIBNOR, La Paz 23090, Baja Calif Sur, MexicoUniv Waterloo, Dept Biol, Waterloo, ON N2L 3G1, CanadaHolguin, G, CIBNOR, Calle Mar Bermejo 195,Col Playa Palo de Sta Rita,, La Paz 23090, Baja Calif Sur, Mexico TI - Transformation of Azospirillum brasilense Cd with an ACC deaminase gene from Enterobacter cloacae UW4 fused to the Tet(r) gene promoter improves its fitness and plant growth promoting ability AB - It has been reported that PGPB, containing ACC deaminase, can cleave the plant ethylene precursor ACC and thereby lower ethylene concentration in a developing or stressed plant, protecting it against the deleterious effects of stress ethylene and facilitating the formation of longer roots. in a previous work we have demonstrated expression of the ACC deaminase gene (acdS) from Enterobacter cloacae UW4 under the control of the lac promoter in Azospirillum brasilense Cd. With the inference that a construct including the ACC deaminase gene under the control of a constitutive promoter weaker than the lac promoter might impose less metabolic load on Azospirillum and improve its fitness, it was decided to clone acdS under the control of a tetracycline resistance gene promoter. The ACC deaminase structural gene was fused to the Tet(r) gene promoter by overlap extension using PCR, cloned in pRK415, and transferred into A. brasilense Cd. The resulting transformants showed lower ACC deaminase activity than those with the lac promoter controlled acdS gene. However, acdS under the control of the Tet(r) gene promoter imposed lesser metabolic load on Azospirillum brasilense Cd. The result was significantly increased IAA synthesis and greater bacterial growth rate, as well as increased ability to survive on the surface of tomato leaves and to promote the growth of tomato seedlings MH - Canada MH - Mexico|Baja California Sur PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Marine & Freshwater Biology;Microbiology U5 - J;Article AV - English IS - 0095-3628 UR - ISI:000184639000013 L2 - PSEUDOMONAS-PUTIDA GR12-2; ROOT-SURFACE COLONIZATION; POLYMERASE CHAIN-REACTION; 1-AMINOCYCLOPROPANE-1-CARBOXYLIC ACID; METABOLIC LOAD; EXPRESSION; LIPOFERUM; SEEDLINGS; CLONING; BACTERIA SO - Microbial Ecology 2003 ;46(1):122-133 8336 UI - 6725 AU - Holmgren CA AU - Penalba MC AU - Rylander KA AU - Betancourt JL AD - Univ Arizona, Desert Lab, Tucson, AZ 85721, USAUS Geol Survey, Tucson, AZ, USAUniv Nacl Autonoma Mexico, Inst Ecol, Sonora 83000, MexicoHolmgren, CA, Univ Arizona, Desert Lab, 1675 W Anklam Rd, Tucson, AZ 85721 USA TI - A 16,000 C-14 yr BP packrat midden series from the USA-Mexico Borderlands AB - A new packrat midden chronology from Playas Valley, southwestern New Mexico, is the first installment of an ongoing effort to reconstruct paleovegetation and paleoclimate in the U.S.A.-Mexico Borderlands. Playas Valley and neighboring basins supported pluvial lakes during full and/or late glacial times. Plant macrofossil and pollen assemblages from nine middens in the Playas Valley allow comparisons of two time intervals: 16,000-10,000 and 4000-0 C-14 yr B.P. Vegetation along pluvial lake margins consisted of open pinyon-juniper communities dominated by Pinus edulis, Juniperus scopulorum, Juniperus cf. coahuilensis, and a rich understory of C-4 annuals and grasses. This summer-flowering understory is also characteristic of modem desert grassland in the Borderlands and indicates at least moderate summer precipitation. P. edulis and J. scopulorum disappeared or were rare in the midden record by 10,670 C-14 yr B.P. The late Holocene is marked by the arrival of Chihuahuan desert scrub elements and few departures as the vegetation gradually became modem in character. Larrea tridentata appears as late as 2190 C-14 yr B.P. based on macrofossils, but may have been present as early as 4095 C-14 yr B.P. based on pollen. Fouquieria splendens, one of the dominant desert species present at the site today, makes its first appearance only in the last millennium. The midden pollen assemblages are difficult to interpret; they lack modern analogs in surface pollen assemblages from stock tanks at different elevations in the Borderlands. (C) 2003 University of Washington. Published by Elsevier Inc. All rights reserved MH - USA MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 10 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0033-5894 UR - ISI:000187180800008 L2 - Pleistocene;Holocene;pluvial lakes;vegetation history;packrat middens;pinyon-juniper woodland;desert grassland;pollen;NORTHERN CHIHUAHUAN DESERT; LATE QUATERNARY LACUSTRINE; PALEOCLIMATIC SIGNIFICANCE; SOUTHERN ARIZONA; OXYGEN ISOTOPES; STABLE CARBON; MOUNTAINS; INDICATORS; SEQUENCE; HISTORY SO - Quaternary Research 2003 ;60(3):319-329 8337 UI - 8749 AU - Hoogenboom G AU - White JW AD - Univ Georgia, Dept Biol & Agr Engn, Griffin, GA 30223, USACIMMYT Int, Mexico City 06600, DF, MexicoHoogenboom, G, Univ Georgia, Dept Biol & Agr Engn, Griffin, GA 30223 USA TI - Improving physiological assumptions of simulation models by using gene-based approaches AB - Application of crop models to plant breeding has been limited, in part due to the restricted capabilities of models to accurately represent genetic differences and genotype-induced crop responses. A gene-ased model, GeneGro, was developed to simulate the effects of seven genes. on growth and developmental processes in common bean (Phaseolus vulgaris L.) and was published in 1996. The objective of this paper is to describe the improvements that were made in GeneGro to incorporate the effect. of the Tip gene. Presence of the Tip gene in photoperiod-sensitive cultivars reduces the inhibitory effect of low temperature on photoperiod sensitivity of flowering. A mechanistic approach, further guided by information on two other genes affecting photoperiod response, i.e., Ppd and Hr, was used to incorporate the effect of the Tip gene. In the modified GeneGro, this inhibitory effect is reduced under cooler temperatures ranging from 15 to 20degreesC for the mean daily temperature. However, in the presence of Tip, no such reduction occurs. For-the calibration data, GeneGro explained 75% of the variation in days to flower vs. 61% for the original model. For an extensive evaluation data set, the modification explained 72% of the variation in days to flower vs. 70% for the original version while days to maturity, seed yield, canopy dry mass, and harvest index showed no improvement. These results reflect two major constraints to effective use of gene-based approaches in crop Modeling. The first is the lack of reliable characterizations of cultivars for genes used in the model. the second is the scarcity of data from conditions where phenotypic. differences between the Tip and tip gene would be expected. It can be concluded that understanding the genetic control of quantitative traits can guide improvements to simulation models MH - Mexico|Distrito Federal MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 16 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000182261000009 L2 - PHASEOLUS-VULGARIS L; DRY BEAN MODEL; PHOTOPERIOD RESPONSE; CROP MODELS; ROOT-GROWTH; TEMPERATURE; ENVIRONMENTS; COEFFICIENTS; SENSITIVITY; INHERITANCE SO - Agronomy Journal 2003 ;95(1):82-89 8338 UI - 6828 AU - Hoogmoed WB AU - Cadena-Zapata M AU - Perdok UD AD - Univ Wageningen & Res Ctr, Soil Technol Grp, NL-6700 AA Wageningen, NetherlandsUniv Autonoma Agraria Antonio Narro, Dept Agr Machinery, Saltillo, Coahuila, MexicoHoogmoed, WB, Univ Wageningen & Res Ctr, Soil Technol Grp, POB 43, NL-6700 AA Wageningen, Netherlands TI - Laboratory assessment of the workable range of soils in the tropical zone of Veracruz, Mexico AB - Information on workability limits is highly valuable at the farm level to help the farmer in deciding when and possibly how to carry out tillage. On higher levels (e.g. on regional scale) this knowledge will form a basis for obtaining guidelines with respect to required number of tractors, equipment etc. and so help in planning and policy making. Data of this kind are often lacking. The study reported here is the laboratory component of research carried out in the tropical area of Veracruz, Mexico. In this study, laboratory methods to determine workability limits were assessed for a typical clay and loam soil. For the dry workability limit (where energy for producing specifically sized aggregates is the decisive factor), the drop test was applied. Results in terms of soil moisture tension at the point of lowest energy expenditure were comparable with the field results. although energy levels were different. For the determination of the wet workability limit (WWL), an air permeability test and a compression test were used. Both tests yielded limits that were very close to the ones determined in the field. The compressibility test allows the assessment of other soil characteristics such as prediction of modification of pF curve and aeration properties under compressive forces. For field or farm scale, workability limits can be obtained from representative areas and then used in combination with water balance models to determine the number of workable days under a certain weather (rainfall) regime. The applicability on a regional scale is as yet more difficult, soil physical information from soil maps is usually not sufficient to allow reliable interpretations. The use of existing pedo-transfer functions to obtain input for models to predict workable days did not produce satisfactory results. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Coahuila MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Soil Science U5 - J;Article AV - English IS - 0167-1987 UR - ISI:000186808400007 L2 - tropical zone;aggregates;rainfall;PHYSICAL-PROPERTIES; TILLAGE; IMPLEMENTS; MODELS SO - Soil & Tillage Research 2003 ;74(2):169-178 8339 UI - 9333 AU - Hoover RS AU - Poch E AU - Monroy A AU - Vazquez N AU - Nishio T AU - Gamba G AU - Hebert SC AD - Yale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06520, USAUniv Nacl Autonoma Mexico, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoTohoku Univ, Sch Med, Dept Pediat, Sendai, Miyagi 980, JapanUniv Barcelona, Hosp Clin, Serv Nefrol, Barcelona, SpainHebert, SC, Yale Univ, Sch Med, Dept Cellular & Mol Physiol, 333 Cedar St,POB 208026, New Haven, CT 06520 USA TI - N-glycosylation at two sites critically alters thiazide binding and activity of the rat thiazide-sensitive Na+: Cl- cotransporter AB - The rat thiazide-sensitive Na-Cl cotransporter (rNCC) is expressed in the renal distal convoluted tubule and is the site of action of an important class of antihypertensive agents, the thiazide diuretics. The amino acid sequence contains two potential N-linked glycosylation consensus sites, N404 and N424. Either enzymatic deglycosylation or tunicamycin reduced the cotransporter to its core molecular weight (113 kD). Glycosylation site single mutants expressed in oocytes ran as thick bands at 115 kD, consistent with the high-mannose glycoprotein. The double mutant produced the single thin 113-kD band seen in the deglycosylated cotransporter. Functional expression of cotransporters in Xenopus laevis oocytes revealed that the mutants displayed drastically decreased, thiazide-sensitive Na-22(+) uptake compared with wild-type NCC. Analysis of enhanced green fluorescence protein (EGF-P)-tagged cotransporters demonstrated that this decrease in function is predominantly secondary to decreased surface expression. The elimination of glycosylation in the double mutant increased thiazide sensitivity by more than two orders of magnitude and also increased Cl- affinity. Thus, we have demonstrated that rNCC is N-glycosylated in vivo at two sites, that glycosylation is essential for efficient function and surface expression of the cotransporter, and that the elimination of glycosylation allows much greater access of thiazide diuretics to their binding site MH - USA MH - Japan MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 27 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 1046-6673 UR - ISI:000180506500004 L2 - K-CL COTRANSPORTER; EPITHELIAL SODIUM-CHANNEL; BRUSH-BORDER MEMBRANE; LINKED GLYCOSYLATION; FUNCTIONAL EXPRESSION; MOLECULAR-CLONING; CHLORIDE COTRANSPORTER; NA+-K+-2CL(-) COTRANSPORTER; SURFACE EXPRESSION; TRANSPORT ACTIVITY SO - Journal of the American Society of Nephrology 2003 ;14(2):271-282 8340 UI - 6374 AU - Hopkins HL AU - Sanchez-Hernandez C AU - Romero-Almaraz MD AU - Gilley LM AU - Schnell GD AU - Kennedy ML AD - Univ Memphis, Dept Biol, Memphis, TN 38152, USAUniv Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoUniv Autonoma Estado Morelos, Ctr Invest Biol, Avenida Univ, Cuernavaca 62210, Morelos, MexicoUniv Oklahoma, Sam Noble Oklahoma Museum Nat Hist, Norman, OK 73072, USAHopkins, HL, Univ Memphis, Dept Biol, Memphis, TN 38152, USA TI - Flight speeds of four species of neotropical bats AB - Flight speeds of Davy's naked-backed bat (Pteronotus davyi), Wagner's mustached bat (P. personatus), Parnell's Mustached bat (P. parnellii), and Peter's leaf-chinned bat (Mormoops megalophylla) were studied in Colima, Mexico, during January 2000. Bats were assessed in a simulated cave passage cleared in a dense thorn forest. Rates of travel over a known distance were measured using stopwatches. Individual flight speeds varied from 7.4 (female P davyi) to 30.6 km/h (male M. megalophylla); mean flight speeds ranged from 11.3 (male P. davyi) to 19.1 km/h (female P. parnellii). There was a positive correlation between mean forearm length and mean flight speed. Larger bats flew faster than smaller ones. Results of this investigation provide the first report of flight speed for female P. davyi (13.1 km/h) and extend our knowledge concerning the flight speeds of other taxa studied MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 2 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000188387800028 SO - Southwestern Naturalist 2003 ;48(4):711-714 8341 UI - 7463 AU - Hotz C AU - Peerson JM AU - Brown KH AD - Univ Calif Davis, Program Int Nutr, Davis, CA 95616, USAInst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca, Morelos, MexicoBrown, KH, Univ Calif Davis, Program Int Nutr, 1 Shields Ave, Davis, CA 95616 USA TI - Suggested lower cutoffs of serum zinc concentrations for assessing zinc status: reanalysis of the second National Health and Nutrition Examination Survey data (1976-1980) AB - Background: The risk of zinc deficiency in populations can be estimated by comparing serum zinc data with statistically defined lower cutoffs derived from a presumably healthy population. Serum zinc data are available from a large sample of the US population assessed during the second National Health and Nutrition Examination Survey (NHANES II). Although the original analysis of these data considered fasting status-and the time of day of blood sampling, it did not account for potentially confounding variables that may affect the serum zinc concentration, such as age, sex, and health status. Objective: The objective was to describe variations in serum zinc concentration by age, sex, and other characteristics and to recommend lower cutoffs for presumably healthy persons. Design: Serum zinc data from NHANES II were analyzed by using analysis of variance and covariance models to identify and describe variables significantly associated with serum zinc concentration; 2.5th percentile curves were produced and used to establish age- and sex-based lower cutoffs. Results: Age and sex were significant confounders of serum zinc concentration, so separate lower cutoffs were derived for children and adolescent and adult males and females. Other minor confounding variables were identified. Tentative lower cutoffs for pregnancy and oral contraceptive use were also derived. Conclusions: The interpretation of population serum zinc data with the use of lower cutoffs should account for the age and sex of the subjects, pregnancy and oral contraceptive use, and fasting status and time of day of blood collection MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 36 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000185403700014 L2 - serum zinc;zinc deficiency;second National Health and Nutrition Examination Survey;NHANES II;PLASMA-ZINC; REFERENCE INTERVALS; MINERAL BALANCE; VITAMIN-A; COPPER; SUPPLEMENTATION; PREGNANCY; CHILDREN; INFANTS; AGE SO - American Journal of Clinical Nutrition 2003 ;78(4):756-764 8342 UI - 8521 AU - Hotz C AU - Lowe NM AU - Araya M AU - Brown KH AD - Univ Calif Davis, Program Int Nutr, Davis, CA 95616, USAUniv Calif Davis, Dept Nutr, Davis, CA 95616, USAInst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca, Morelos, MexicoUniv Cent Lancashire, Dept Nutr Sci, Preston PR1 2HE, Lancs, EnglandUniv Chile, Inst Nutr & Tecnol Alimentos, Santiago 11, ChileHotz, C, Univ Calif Davis, Program Int Nutr, Davis, CA 95616, USA TI - Assessment of the trace element status of individuals and populations: The example of zinc and copper AB - This paper describes the proceedings of a workshop that was convened at the 11th International Symposium on Trace Elements in Man and Animals (TEMA-11) symposium to review recent advances concerning the assessment of the trace element status of individuals and populations, using zinc and copper as the primary examples to illustrate basic principles and recent advances in assessment methods. The workshop was initiated with a brief review of the importance of zinc nutriture for human health and a discussion of the likely common occurrence of zinc deficiency worldwide. This overview was followed by presentations on selected issues concerning the assessment of zinc status, with particular attention devoted to dietary assessment techniques, the use of isotopic tracers to assess zinc homeostasis and the relationship of these methods to biochemical indicators of zinc status. Because relatively little information is available on zinc toxicity, the discussion concerning the definition of excess intake of trace elements focused primarily on recent work concerning risk assessment of copper toxicity MH - Chile MH - United Kingdom MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 10 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000182828100033 L2 - zinc;copper;trace elements;nutritional assessment;toxicity;RANDOMIZED CONTROLLED TRIALS; DEVELOPING-COUNTRIES; KINETIC-ANALYSIS; POOLED ANALYSIS; METABOLISM; CHILDREN; HEALTH; HUMANS; SUPPLEMENTATION; HOMEOSTASIS SO - Journal of Nutrition 2003 ;133(5):1563S-1568S 8343 UI - 8090 AU - Houbaert Y AU - Colas R AU - Barros J AU - Ruiz D AU - Vandenberghe R AU - De Wulf M AU - Ros-Yanez T AD - State Univ Ghent, Dept Met & Mat Sci, B-9052 Ghent, Belgium. State Univ Ghent, Dept Elect Energy Syst & Automat, B-9000 Ghent, Belgium. Univ Autonoma Nuevo Leon, FIME, San Nicolas De Los Garza, NL, Mexico. State Univ Ghent, Dpt Subatom & Radiat Phys, B-9000 Ghent, Belgium TI - Advances on the characterization of high-silicon steel for electrical applications produced by thermomechanical and dipping-annealing treatment AB - Fe-Si alloys are excellent soft magnetic materials: with increasing Si content and a peak at 6.5% Si they present almost zero magnetostriction, increasing electrical resistance and permeability, low Eddy current losses and low hysteresis losses. Silicon steels contain usually up to 3.5% Si because a higher content makes the material extremely brittle and very difficult to cold-roll. The reason of this behavior has been generally attributed to structural ordering (132 and D0(3)). Thermomechanical processing of high silicon steel appears to be possible whenever special conditions of temperature and rolling passes are maintained in order to avoid embrittlement. Alloys with Si between 6.4 and 10.3 at.% were produced on a laboratory scale to investigate the effect of order-disorder phenomena on workability. (57)Mossbauer spectroscopy was used to study the effect of thermomechanical cycles on the ordering. Compression tests (at high strain rate) were carried out to study the deformation behavior and the effect of time delay between hot and cold rolling on mechanical properties. An increase of the deformation stress is observed between the deformation steps, which is increasing with higher Si-content and probably caused by an ordering phenomenon. Hot dipping and diffusion annealing is an alternative production route to obtain high silicon contents without rolling. Additional surface alloying with Si and Al is achieved on a normal steel substrate (low Si) by hot dipping in a hypereutectic Al-Si-bath. To obtain a sufficient amount of Al and Si in solid solution over the thickness, diffusion annealing is performed after hot dipping. Characterization of the deposited layer and of the diffusion gradients was performed, the magnetic properties are comparable with the best commercial values of oriented electrical steel MH - Belgium MH - Mexico|Nuevo Leon T3 - THERMEC'2003Materials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle1BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBW92N AV - English IS - 0255-5476 UR - ISI:000183626400179 SO - 2003 ;():1145-1150 8344 UI - 6151 AU - Huang G AU - Sauer WC AU - He J AU - Ramirez M AD - Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, CanadaUniv Autonoma Baja California, Inst Ciencias Agr, Mexicali 21100, Baja California, MexicoSauer, WC, Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, Canada TI - The nutritive value of hulled and hulless barley for growing pigs. 2. Determination of in vivo and in vitro energy and in vivo ileal amino acid digestibility AB - An experiment was conducted to determine the apparent ileal amino acid digestibilities in hulled and hulless barley, in addition to energy digestibility which was also determined with the in vitro method. Seven barrows, fitted with a simple T-cannula at the distal ileum, were fed seven diets (180 g CP kg(-1)) according to a 7 x 7 Latin square design. The basal diet consisted of maize starch and soyabean meal (SBM). The other diets (diets A to F) contained both SBM and barley. Diet A: hulled barley, c.v. Harrington I. Diet B: hulled barley, c.v. Harrington II. Diet C: hulless barley, c.v. CDC Buck I. Diet D: hulless barley, c.v. CDC Buck II. Denotations I and II are given to indicate two different origins of Harrington and CDC Buck. Diet E: mixture of c.v: Harrington I and c.v. CDC Buck I (50:50 wt/wt). Diet F: mixture of c.v. Harrington II and c.v. CDC Buck II (50:50 wt/wt). The mixtures were created to establish linear regression equations between the in vivo and in vitro energy digestibility values. Chromic oxide was used as the digestibility marker. The barrows were fed twice daily, at 08.00 and 20.00 h. Each experimental period comprised 10 days. Faeces were collected from 08.00 on d 6 to 08.00 on d 8. Ileal digesta were collected from 08.00 on d 8 until 08.00 on d 10. The initial and final average body weights of the barrows were 35 and 90 kg, respectively. The amino acid and energy digestibility values were determined with the difference method. The apparent ileal amino acid digestibility values were lower (P < 0.05) in hulless than in hulled barley. The digestibilities of lysine and threonine (first- and second-limiting amino acid in barley) ranged from 58.2 to 59.4% and from 53.7 to 55.6%, respectively, in hulless barley and from 62.6 to 69.7% and from 57.4 to 59.6%, respectively, in hulled barley. The energy digestibility values ranged from 86.4 to 87.6% in hulless barley and from 79.9 to 81.1% in hulled barley. There was a close correlation (r(2) = 0.88) between the in vivo and in vitro energy digestibility values MH - Canada MH - Mexico|Baja California PB - JABLONNA: KIELANOWSKI INST ANIMAL PHYSIOLOGY NUTRITION RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 1230-1388 UR - ISI:000189114500009 L2 - pigs;digestibility;amino acids;energy;barley;YOUNG-PIGS; BETA-GLUCANS; PROTEIN; FEEDSTUFFS; FECES; WHEAT; DIETS; SWINE; MEAL SO - Journal of Animal and Feed Sciences 2003 ;12(4):771-784 8345 UI - 7007 AU - Hudson R AU - Navarrete-Palacios E AU - Guevara-Guzman R AU - Distel H AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Fisiol, Mexico City 04510, DF, MexicoUniv Munich, D-80539 Munich, Germany TI - The nasal mucosa continually changing interface with the external world MH - Germany MH - Mexico|Distrito Federal PB - GOTTINGEN: HOGREFE & HUBER PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Psychology, Biological;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0269-8803 UR - ISI:000186488100077 SO - Journal of Psychophysiology 2003 ;17(3):156-156 8346 UI - 8832 AU - Huerta-Lopez C AU - Pulliam J AU - Nakamura Y AD - Univ Texas, Inst Geophys, Austin, TX 78759, USAUniv Texas, Dept Civil Engn, Austin, TX 78759, USAHuerta-Lopez, C, CICESE, Dept Sismol, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - In situ evaluation of shear-wave velocities in seafloor sediments with a broadband ocean-bottom seismograph AB - We present an in situ evaluation of the response of seafloor sediments to passive dynamic loads. Horizontal-to-vertical (H/V) spectral ratios are used to characterize local sediment response, and 1D wave propagation modeling is used to estimate soil properties and theoretical amplification factors of shallow sediment layers. Horizontal amplitudes increased by an order of magnitude at 0.35 Hz and by at least 2 orders of magnitude at 1.9 Hz relative to the vertical amplitude. A 50-m-thick soil system parameterized as three solid layers,resting over a half-space with a water layer at the top produces theoretical H/V spectral ratios that are largely-consistent with. the observed H/V spectral ratios. Our modeling results were consistent between: earthquake and background noise records. Modeling H/V spectral ratios of noise data recorded by a three-component broadband ocean-bottom seismograph (BBOBS) offers a fast and inexpensive method for site investigation in deep water with the potential of in situ seafloor sediment characterization, as well as local site effect studies for foundations (30-100 m) and pipelines (2-5 m) in deep water. One. need not supply an active source or wait for an appropriate earthquake, and the BBOBS is small, inexpensive, and autonomous once deployed MH - Mexico|Baja California MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000181971700010 L2 - VERTICAL SPECTRAL RATIO; STRONG GROUND MOTION; GEOLOGICAL CONDITIONS; MEXICO; GULF SO - Bulletin of the Seismological Society of America 2003 ;93(1):139-151 8347 UI - 8531 AU - Hughes DP AU - Moya-Raygoza G AU - Kathirithamby J AD - Univ Oxford, Dept Zool, Oxford OX1 3PS, EnglandUniv Guadalajara, Dept Bot & Zool, CUCBA, Jalisco 45110, MexicoHughes, DP, Univ Oxford, Dept Zool, S Parks Rd, Oxford OX1 3PS, England TI - The first record among Dolichoderinae (Formicidae) of parasitism by Strepsiptera AB - We present the first record of parasitism of Dolichoderus bispinosus nests by Strepsiptera belonging to the family Myrmecolacidae. This becomes only the fourteenth species of ant and the fifth subfamily to be identified as a host to Strepsiptera. Of the three colonies examined all were parasitized. Prevalence of parasitism among adult ants was less than 2 % in each case. However, among alate males of one colony, nearly 24% were parasitized. In conjunction with a reanalysis of previously published data we discuss the possibility that ant castes are differentially parasitized by Strepsiptera. We review the natural history of strepsipteran parasitism in ants, effects on host behaviour and incidences of parasitism in the hope of enabling detection of this parasite by myrmecologists MH - United Kingdom MH - Mexico|Jalisco PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0020-1812 UR - ISI:000182747500008 L2 - Strepsiptera;Myrmecolacidae;Dolichoderus bispinosus;parasitism;behaviour change;CAENOCHOLAX-FENYESI STREPSIPTERA; SOLENOPSIS-INVICTA HYMENOPTERA; MYRMECOLACIDAE; STYLOPIZATION; HOST SO - Insectes Sociaux 2003 ;50(2):148-150 8348 UI - 6864 AU - Hughes MF AU - Kenyon EM AU - Edwards BC AU - Mitchell CT AU - Del Razo LM AU - Thomas DJ AD - US EPA, ORD, NHEERL, ETD,PKB, Res Triangle Pk, NC 27711, USAIPN, CINVESTAV, Mexico City 07738, DF, Mexico TI - Comparative metabolism of arsenic in mice after a single or repeated oral administration of arsenate MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0360-2532 UR - ISI:000186069300187 SO - Drug Metabolism Reviews 2003 ;35():96-96 8349 UI - 7377 AU - Hughes MF AU - Kenyon EM AU - Edwards BC AU - Mitchell CT AU - Del Razo LM AU - Thomas DJ AD - US EPA, NHEERL, Off Res & Dev, Expt Toxicol Div, Res Triangle Pk, NC 27711, USAIPN, CINVESTAV, Toxicol Sect, Mexico City 07000, DF, MexicoHughes, MF, US EPA, NHEERL, Off Res & Dev, Expt Toxicol Div, MD B143-05, Res Triangle Pk, NC 27711 USA TI - Accumulation and metabolism of arsenic in mice after repeated oral administration of arsenate AB - Exposure to the human carcinogen inorganic arsenic (iAs) occurs daily. However, the disposition of arsenic after repeated exposure is not well known. This study examined the disposition of arsenic after repeated po administration of arsenate. Whole-body radioassay of adult female B6C3F1 mice was used to estimate the terminal elimination half-life of arsenic after a single po dose of [As-73]arsenate (0.5 mg As/kg). From these data, it was estimated that steady-state levels of whole-body arsenic could be attained after nine repeated daily doses of [As-73]arsenate (0.5 mg As/kg). The mice were whole-body radioassayed immediately before and after the repeated dosing. Excreta were collected daily and analyzed for arsenic-derived radioactivity and arsenicals. Whole-body radioactivity was determined 24 h after the last repeated dose, and five mice were then euthanized and tissues analyzed for radioactivity. The remaining mice were whole-body radioassayed for 8 more days, and then their tissues were analyzed for radioactivity. Other mice were administered either a single or nine repeated po doses of non-radioactive arsenate (0.5 mg As/kg). Twenty-four hours after the last dose, the mice were euthanized, and tissues were analyzed for arsenic by atomic absorption spectrometry (AAS). Whole-body radioactivity was rapidly eliminated from mice after repeated [As-73]arsenate exposure, primarily by urinary excretion in the form of dimethylarsinic acid (DMA(V)). Accumulation of radioactivity was highest in bladder, kidney, and skin. Loss of radioactivity was most rapid in the lung and slowest in the skin. There was an organ-specific distribution of arsenic as determined by AAS. Monornethylarsonic acid was detected in all tissues except the bladder. Bladder and lung had the highest percentage of DMA(V) after a single exposure to arsenate, and it increased with repeated exposure. In kidney, iAs was predominant. There was a higher percentage of DMA(V) in the liver than the other arsenicals after a single exposure to arsenate. The percentage of hepatic DMA(V) decreased and that of iAs increased with repeated exposure. A trimethylated metabolite was also detected in the liver. Tissue accumulation of arsenic after repeated po exposure to arsenate in the mouse corresponds to the known human target organs for iAs-induced carcinogenicity. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 17 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-008X UR - ISI:000185531500002 L2 - arsenic;arsenate;disposition;repeated exposure;metabolism;accumulation;MONOMETHYLARSONOUS ACID MMA(III); DIMETHYLARSINIC ACID; DRINKING-WATER; BLADDER CARCINOGENESIS; ENZYMATIC METHYLATION; DEPENDENT DISPOSITION; TISSUE DISTRIBUTION; SODIUM ARSENATE; IN-VITRO; RATS SO - Toxicology and Applied Pharmacology 2003 ;191(3):202-210 8350 UI - 7461 AU - Hunt GJ AU - Guzman-Novoa E AU - Uribe-Rubio JL AU - Prieto-Merlos D AD - Purdue Univ, Dept Entomol, W Lafayette, IN 47907, USANatl Autonomous Univ Mexico, Fac Med Vet, Mexico City 04510, DF, MexicoHunt, GJ, Purdue Univ, Dept Entomol, W Lafayette, IN 47907, USA TI - Genotype-environment interactions in honeybee guarding behaviour AB - Honeybees have an age-based division of labour that is influenced by genetic variability for the tendency to perform specific tasks. Individuals in a honeybee colony comprise diverse genotypes and their interactions can influence task allocation. Colonies from an African race (Africanized honeybees, AHB, Apis mellifera scutellata Ruttner) usually produce a much stronger defensive response than do European races of honeybees (EHB), and these races may differ in how individuals are allocated to the tasks of guarding and stinging. We observed guarding behaviour in colony environments that varied in proportions of genotypes (AHB, EHB) and population size. In large colonies, AHB showed much greater guarding persistence (number of days guarding) than EHB; hybrids were intermediate. In another series of experiments, three families each of AHB and EHB were cofostered in colonies with different AHB: EHB ratios, then tested in large and small colonies. In colonies of both sizes, colony environment interacted with both famly and type (AHB or EHB) for propensity to guard. Individuals of both types guarded more persistently in large colonies, but family and type both interacted with environment. EHB were more likely to initiate guarding bouts in low-AHB colonies, but persistence did not change with environment. AHB were insensitive to effects of environment for the tendency to initiate guarding behaviour, but were more persistent in high-AHB environments. EHB and AHB may differ in how they allocate individuals to guarding. The positive reinforcement of behaviour that occurs in high-defensive environments and in large populations could cause a stronger stinging response through alarm pheromone recruitment. (C) 2003 Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0003-3472 UR - ISI:000185477900006 L2 - BEES APIS-MELLIFERA; DIVISION-OF-LABOR; DEFENSIVE BEHAVIOR; COLONY DEFENSE; TASK SPECIALIZATION; GENETIC DOMINANCE; VARIABILITY; HYMENOPTERA; APIDAE; IDENTIFICATION SO - Animal Behaviour 2003 ;66():459-467 8351 UI - 8983 AU - Hunt GJ AU - Wood KV AU - Guzman-Novoa E AU - Lee HD AU - Rothwell AP AU - Bonham CC AD - Purdue Univ, Dept Entomol, W Lafayette, IN 47907, USAPurdue Univ, Dept Chem, W Lafayette, IN 47907, USAINIFAP, CENIFMA, Metepec 52140, Edo Mex, MexicoPurdue Univ, Dept Biochem, W Lafayette, IN 47907, USAHunt, GJ, Purdue Univ, Dept Entomol, W Lafayette, IN 47907, USA TI - Discovery of 3-methyl-2-buten-1-yl acetate, a new alarm component in the sting apparatus of Africanized honeybees AB - We analyzed the alarm pheromone components from five colonies of Africanized honeybees and three colonies of European honeybees collected in Mexico. Analyses revealed a novel alarm pheromone component that was only present in appreciable quantities in the Africanized bee samples. Analysis of the mass spectrum and subsequent synthesis confirmed that this compound is 3-methyl-2-buten-1-yl acetate (3M2BA), an unsaturated derivative of IPA. In Africanized honeybees, sampling from stings of guards showed that 3M2BA was present at levels of 0-38% the amount of isoamyl acetate (IPA). Behavioral assays from three colonies each of Africanized and European bees showed that 3M2BA recruited worker bees from hives of both Africanized bees and European bees at least as efficiently as isopentyl acetate IPA, a compound widely reported to have the highest activity for releasing alarm and stinging behavior in honeybees. However, a mixture of of 3M2BA and IPA (1:2) recruited bees more efficiently than either of the compounds alone. None of the compounds differed in their efficacy for inducing bees to pursue the observers MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000181374800013 L2 - Apis mellifera;honeybee;stinging;alarm;pheromone;social insect;defensive behavior;APIS-MELLIFERA-L; QUANTITATIVE TRAIT LOCI; PHEROMONE PRODUCTION; DEFENSIVE BEHAVIOR; ISOPENTYL ACETATE; BEE HYMENOPTERA; COLONY DEFENSE; APIDAE; IDENTIFICATION SO - Journal of Chemical Ecology 2003 ;29(2):453-463 8352 UI - 7253 AU - Hunt KJ AU - Williams K AU - Rivera D AU - O'Leary DH AU - Haffner SM AU - Stern MP AU - Villalpando CG AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78229, USAAmer British Cowdray Med Ctr, Ctr Estudios Diabet, Mexico City, DF, MexicoTufts New England Med Ctr, Dept Radiol, Boston, MA, USAInst Mexicano Seguro Social, Hosp Gabriel Mancera, Unidade Invest Med Enfermedades Metab, Mexico City, DF, MexicoInst Mexicano Seguro Social, Hosp Gabriel Mancera, Unidade Epidemiol Clin, Mexico City, DF, MexicoHunt, KJ, Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Elevated carotid artery intima-media thickness levels in individuals who subsequently develop type 2 diabetes AB - Objective - We examined whether B-mode ultrasound - detected carotid artery intima-media thickness (IMT) was elevated before the onset of clinical diabetes. Methods and Results - The study population for these analyses included 1127 nondiabetic participants, 66 prediabetic participants, and 303 diabetic participants with a mean age of 49.8 years who participated in the Mexico City Diabetes Study, a prospective cohort study. Common carotid artery (CCA) and internal carotid artery (ICA) IMTs were measured bilaterally by B-mode ultrasound. Age- and sex-adjusted mean ICA and CCA IMTs were both significantly higher among prediabetic individuals {0.81 mm [95% confidence interval (CI), 0.75 - 0.88] and 0.72 mm [ 95% CI, 0.69 - 0.75], respectively} than in individuals who remained free of diabetes [0.71 mm ( 95% CI, 0.69 - 0.72) and 0.69 mm ( 95% CI, 0.68 - 0.69), respectively]. However, after adjustment for established cardiovascular risk factors, ICA IMT, but not CCA IMT, remained significantly higher among prediabetic individuals [ 0.81 mm ( 95% CI, 0.75 - 0.88) and 0.71 mm ( 95% CI, 0.68 - 0.74)] than in individuals who remained free of diabetes [ 0.71 mm ( 95% CI, 0.69 - 0.72) and 0.69 mm ( 95% CI, 0.68 - 0.70)]. Conclusions - The present study provides direct evidence at the vascular level that atherosclerosis levels are elevated before the clinical onset of diabetes MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 20 U4 - Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 1079-5642 UR - ISI:000185850200026 L2 - atherosclerosis;carotid arteries;imaging;diabetes mellitus;INSULIN-RESISTANCE ATHEROSCLEROSIS; IMPAIRED GLUCOSE-TOLERANCE; C-REACTIVE PROTEIN; CORONARY-HEART-DISEASE; CARDIOVASCULAR-DISEASE; RISK-FACTORS; MYOCARDIAL-INFARCTION; METABOLIC SYNDROME; MEXICO-CITY; COMMON ANTECEDENTS SO - Arteriosclerosis Thrombosis and Vascular Biology 2003 ;23(10):1845-1850 8353 UI - 8747 AU - Hunt LA AU - Reynolds MP AU - Sayre KD AU - Rajaram S AU - White JW AU - Yan W AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, CanadaWhite, JW, CIMMYT, Apt Postal 6-641, Mexico City 06600, DF, Mexico TI - Crop modeling and the identification of stable coefficients that may reflect significant groups of genes AB - Knowledge about the functioning of a crop system can be embedded in simulation models of crop growth and development. Such quantitative models have until now made extensive. use of physiological knowledge, but modeling could benefit greatly by incorporating genetic information. Equally, because models can help resolve environmentally varying characteristics into stable characteristics that reflect groups of genes, genomics research could benefit from modeling efforts. The use of the model Cropsim to analyze wheat (Triticum aestivum L.) growth and development is demonstrated. Data on reproductive development were well fitted when the life cycle was divided into phases, although photoperiodic sensitivity varied between phases. Describing leaf appearance satisfactorily required introducing an effect of photoperiod. Understanding the need for a breakdown into phases of development, for varying photoperiodic sensitivities, and for photoperiodic control of leaf appearance, could be enhanced by genomic studies. Simulating growth of wheat over successive seasons required changing supposedly stable genotypic characteristics. Furthermore, growth of near inbred lines incorporating the Lr19 chromosome translocation varied with genotypic background. These results also indicate that, given the Variation in modeling outputs from year to year, care should be taken in the application of models to long-term problems; and that efforts should be devoted to model improvement. Further development of crop models will benefit from associating genomic analysis with field experiments and model analyses. Much could be gained from increased interaction among model developers, field experimenters, and genomics researchers MH - Canada MH - Mexico|Distrito Federal PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 11 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000182261000004 L2 - FLOWERING TIME; LEAF APPEARANCE; SPRING WHEAT; SOWING DATE; PHOTOPERIOD; VERNALIZATION; PLANTS; BARLEY; GROWTH; MORPHOGENESIS SO - Agronomy Journal 2003 ;95(1):20-31 8354 UI - 9065 AU - Husain M AU - Singh BP AU - Kumar S AU - Sharma TP AU - Sebastian PJ AD - Jamia Millia Islamia, Dept Phys, New Delhi 110025, IndiaCCS Univ, Dept Phys, Meerut 250004, Uttar Pradesh, IndiaUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoHusain, M, Jamia Millia Islamia, Dept Phys, New Delhi 110025, India TI - Optical, electrical and structural investigations on Cd1-xZnxSe sintered films for photovoltaic applications AB - II-VI polycrystalline semiconducting materials have come under increased scrutiny because of their wide use in the cost reduction of devices for photovoltaic applications. Cd1-xZnxSe is an important semiconducting alloy because of the tunability of its physical parameters such as band gap and lattice parameters by controlling its stoichiometry. Many more material characteristics of it would be altered and excellently controlled by controlling system composition x. Polycrystalline thin films of Cd1-xZnxSe with variable composition (0 less than or equal to x less than or equal to 1) have been deposited onto ultra-clean glass substrates by sintering process. The optical, structural and electrical transport properties of Cd1-xZnxSe thin films have been examined. The optical band gap and optical constants of these films were determined by using double beam spectrophotometer. The DC conductivity and activation energy of the films were measured in vacuum by two-probe technique. The Schottky junction of Cd1-xZnxSe with indium was made and the barrier height and ideality factor were determined using current-voltage characteristics. The nature of sample, crystal structure and lattice parameters were determined from X-ray diffraction patterns. The films were polycrystalline in nature having cubic zinc-blende structure over the whole range studied. Sintering is very simple and viable compared to other cost intensive methods. The results of the present investigation will be useful in characterizing the material, Cd1-xZnxSe, for its applications in photovoltaics. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000181118900017 L2 - sintering;conductivity;barrier height;crystal structure;SE THIN-FILMS; SYSTEM SO - Solar Energy Materials and Solar Cells 2003 ;76(3):399-415 8355 UI - 7593 AU - Hwu HG AU - Gorenc KD AU - Peredo S AU - Hwang TJ AU - Abreu LF AU - Chen CC AD - Natl Taiwan Univ Hosp, Dept Psychiat, Taipei 100, TaiwanNatl Taiwan Univ, Coll Med, Taipei, TaiwanNatl Autonomous Univ Mexico, Fac Med, Board Planning & Inst Dev, Mexico City 04510, DF, MexicoTaipei City Psychiat Ctr, Taipei, TaiwanHwu, HG, Natl Taiwan Univ Hosp, Dept Psychiat, 7 Chung Shan S Rd, Taipei 100, Taiwan TI - Brief alcoholism screening questionnaire: Establishment and validity in Taiwanese AB - Background and Purpose: There has been a marked increase in the prevalence of alcoholism in the Taiwanese population over the past 6 decades. This study was designed to establish a Taiwanese Brief Alcoholism Screening Questionnaire (BASQ) for use in early detection in medical and public health settings. Methods: Interview data were collected from the database of the Taiwan Psychiatric Epidemiological Project (TPEP). The TPEP interviews had been conducted using the Chinese-modified version of the Diagnostic Interview Schedule (DIS-CM) that included a section on alcoholism diagnosis. Data collected from a community sample of 13,373 subjects was used in this study. Twenty nine DIS-CM items for alcoholism diagnosis were entered into an analytic model with 7 statistical filters to identify cross-cultural items. A brief alcoholism screening questionnaire was constructed using these selected items. The validity of the questionnaire was tested in subjects (n = 457) recruited from a local medical center, a hospital clinic, and an alcoholism clinic of a psychiatric center. Results: Four cross-cultural items were identified and the BASQ was constructed. This BASQ had a best cut-off point of 3 with adequate sensitivity (0.86 to 0.88), specificity (0.88 to 0.89), and positive prediction rate (0.90 to 0.91). It detected a varying prevalence of alcoholism (10.1 to 90.3 %) in diverse clinical settings. Conclusions: A 4-item BASQ was established with adequate validity for clinical and public health application in the early detection of alcoholism in Taiwanese subjects MH - Mexico|Distrito Federal MH - Taiwan PB - CHAI WAN: EXCERPTA MEDICA ASIA LTD RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0929-6646 UR - ISI:000185016200007 L2 - alcoholism;cultural characteristics;questionnaires;reproducibility of results;sensitivity and specificity;DIAGNOSTIC INTERVIEW SCHEDULE; CAGE QUESTIONNAIRE; CHINESE; VALIDATION; PREVALENCE SO - Journal of the Formosan Medical Association 2003 ;102(4):250-256 8356 UI - 9331 AU - Hyers RW AU - Trapaga G AU - Abedian B AD - Univ Massachusetts, Dept Mech & Ind Engn, Amherst, MA 01002, USANASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812, USACINVESTAV, Lab Invest Mat, Unidad Queretaro, Queretaro 76230, Qro, MexicoTufts Univ, Dept Mech Engn, Medford, MA 02155, USAHyers, RW, Univ Massachusetts, Dept Mech & Ind Engn, Amherst, MA 01002 USA TI - Laminar-turbulent transition in an electromagnetically levitated droplet AB - During experiments on the MSL-1 (first microgravity science laboratory) mission of the space shuttle (STS-83 and STS-94, April and July 1997), a droplet of palladium-silicon alloy was electromagnetically levitated for viscosity measurements. For the nondeforming droplet, the resultant magnetohydrodynamic (MHD) flow inside the drop can be inferred from motion of impurity particulates on the surface. In the experiments, subsequent to melting, Joule heating produces a continuous reduction of viscosity of the fluid resulting in an acceleration of the flow with time. These observations indicate formation of a pair of co-rotating toroidal flow structures inside the spheroidal drop that undergo flow instabilities. As the fluid temperature rises, the amplitude of the secondary flow increases, and beyond a point, the tracers exhibit noncoherent chaotic motion signifying emergence of turbulence inside the drop. Assuming that the observed laminar-turbulent transition is shear-layer type, the internal structure of the toroidal loops is used to develop a semiempirical correlation for the onset of turbulence. Our calculations indicate that the suggested correlation is in modest agreement with the experimental data, with the transition occurring at a Reynolds number of 600 MH - Mexico|Queretaro MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000180600300004 L2 - METAL DROPLETS; MAGNETIC-FIELD; FLOW; OSCILLATIONS; MICROGRAVITY; SPHERE; HEAT SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2003 ;34(1):29-36 8357 UI - 8295 AU - Hysong TA AU - Burgess JL AU - Garcia MEC AU - O'Rourke MK AD - Calif Air Resources Board, Sacramento, CA 95812, USAUniv Arizona, Coll Publ Hlth, Dept Community & Environm Hlth Practice & Policy, Tucson, AZ, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Farmacol & Toxicol, Mexico City, DF, MexicoHysong, TA, Calif Air Resources Board, 1001 I St,POB 2815, Sacramento, CA 95812 USA TI - House dust and inorganic urinary arsenic in two Arizona mining towns AB - Residents of copper mining and smelting towns may have increased risk of arsenic exposure from elevated arsenic contained in environmental media. To determine the relation of arsenic in house dust to inorganic urinary arsenic concentrations, a door-to-door survey was conducted in Hayden and Winkelman, Arizona. A total of 122 households ( 404 individuals) participated; 85 provided dust samples. Urine was collected at first morning void and analyzed for total and speciated arsenic. Speciation of arsenic was performed in samples with total arsenic above 10 mug/l (N = 106). The generalized estimating equation was used to determine the relation between urinary and house dust arsenic concentrations, allowing adjustment for the correlation of measurements obtained from the same home. Seafood consumption during the past 3 days and smoking contributed significantly to inorganic urinary arsenic, after adjusting for age and gender. Arsenic in house dust was not significantly associated with inorganic urinary arsenic measurements in this population MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Toxicology U5 - J;Article AV - English IS - 1053-4245 UR - ISI:000183300200005 L2 - arsenic;house dust;inorganic urinary arsenic;LUNG-CANCER MORTALITY; FORMER COPPER SMELTER; DISEASE ENDEMIC AREA; EL-PASO SMELTER; DRINKING-WATER; MALIGNANT NEOPLASMS; INGESTION; EXPOSURE; BLADDER; CHILDREN SO - Journal of Exposure Analysis and Environmental Epidemiology 2003 ;13(3):211-218 8358 UI - 8761 AU - Iakovleva AI AU - Kulkova IA AD - Univ Montpellier 2, UMR CNRS 5554, ISEM, Lab Paleoenvironm & Palynol, F-34095 Montpellier, FranceRussian Acad Sci, Inst Geol, Paleoflorist Lab, Moscow 109017, RussiaRussian Acad Sci, Palynol Lab, Associated Inst Geol Geophys & Mineral, Novosibirsk 630090, RussiaIakovleva, AI, Univ Nacl Autonoma Mexico, Inst Geol, Delegac Coyoacan, Mexico City 04510, DF, Mexico TI - Paleocene-Eocene dinoflagellate zonation of Western Siberia AB - This paper presents a new Paleocene-Eocene dinoflagellate zonation of Western Siberia. Twelve dinoflagellate zones are recognised in the Western Siberian lithological formations and are compared with the corresponding zones in NW Europe and the former Soviet Union. The interpretation of the age of these zones permits stratigraphical age determinations to be made for the Western Siberian regional lithological formations. The absence in the northern West Siberian sections of equivalents of the NW European Lutetian dinoflagellate zones suggests an interruption in marine sedimentation during this part of the middle Eocene. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Paleontology U5 - J;Article AV - English IS - 0034-6667 UR - ISI:000182053100001 L2 - biostratigraphy;dinoflagellate cysts;late Paleocene-Eocene;Western Siberia;NORTH-SEA; STRATIGRAPHY; BASIN SO - Review of Palaeobotany and Palynology 2003 ;123(3-4):185-197 8359 UI - 6753 AU - Ibanez J AU - Aylett R AU - Ruiz-Rodarte R AD - Univ Pompeu Fabra, Dept Technol, E-08003 Barcelona, SpainUniv Salford, Ctr Virtual Environm, Salford M5 4WT, Lancs, EnglandInst Tecnol Estud Super Monterrey, Mexico City 52926, DF, MexicoIbanez, J, Univ Pompeu Fabra, Dept Technol, Passeig Circumvallacio 8, E-08003 Barcelona, Spain TI - That's my point! Telling stories from a virtual guide perspective AB - This paper describes our proposal for storytelling in virtual environments from a virtual guide perspective. In our model the guide begins at a particular location and starts to navigate the world telling the user stories related to the places she visits. Our guide tries to emulate a real guide's behaviour in such a situation. In particular, she behaves as a spontaneous real guide who knows stories about the places in the virtual world but has not prepared an exhaustive tour nor a storyline MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000187008600042 SO - Intelligent Virtual Agents 2003 ;2792():249-253 8360 UI - 7294 AU - Ibarra-Escamilla B AU - Kuzin EA AU - Gomez-Garcia DE AU - Gutierrez-Zainos F AU - Mendoza-Vazquez S AU - Haus JW AD - INAOE, Puebla 72000, MexicoUniv Dayton, Electroopt Program, Dayton, OH 45469, USAIbarra-Escamilla, B, INAOE, AP 51 & 216, Puebla 72000, Mexico TI - A mode-locked fibre laser using a Sagnac interferometer and nonlinear polarization rotation AB - We analyse the propagation in a nonlinear, birefringent optical fibre with twist. The results show that the polarization evolution is periodic and they are applied to the analysis of a Sagnac interferometer. We give a useful way to visualize the behaviour of the nonlinear optical loop mirror (NOLM) (as a function of birefringence, twist, length, and input polarization) in terms of the Poincare sphere. We describe a new fibre laser configuration based on the NOLM with a symmetrical coupler, quarter-wave retarder, and highly twisted, birefringent fibre in the loop. We achieved stable generation of subpicosecond pulses with milliwatts of average output power MH - Mexico|Puebla MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 1464-4258 UR - ISI:000185764600038 L2 - mode-locked fibre laser;fibre Sagnac interferometer;OPTICAL LOOP MIRROR; PULSES SO - Journal of Optics A-Pure and Applied Optics 2003 ;5(5):S225-S230 8361 UI - 8960 AU - Ibarra-Escamilla B AU - Kuzin EA AU - Gutierrez-Zainos F AU - Tellez-Garcia R AU - Haus JW AU - Rojas-Laguna R AU - Estudillo-Ayala JM AD - INAOE, Puebla 72000, MexicoUniv Dayton, Electroopt Program, Dayton, OH 45469, USAUniv Guanajuato, FIMEE, Salamanca 36730, Gto, MexicoIbarra-Escamilla, B, INAOE, AP 51 & 216, Puebla 72000, Mexico TI - Measurement of beat length in short low-birefringence fibers using the fiber optical loop mirror AB - In this paper we provide a detailed analysis and investigation of a novel experimental method to measure the birefringence in short low-birefringence fibers. This method is based on the fiber's twist in a fiber optical loop mirror. It allows simple birefringence measurement in fibers with beat length within the range of 0.4-100 m. The shortest fiber we were able to measure was 0.034 of beat length. Statistical error of measurements was less than 3%. To demonstrate the measurement technique we present experimental results for three optical fibers whose beat lengths were in the range from 1 to 19 m. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000181366000027 L2 - sagnac interferometer;optical fibers;birefringence optical fibers;SINGLE-MODE FIBERS SO - Optics Communications 2003 ;217(1-6):211-219 8362 UI - 7460 AU - Ibarra JE AU - del Rincon MC AU - Orduz S AU - Noriega D AU - Benintende G AU - Monnerat R AU - Regis L AU - de Oliveira CMF AU - Lanz H AU - Rodriguez MH AU - Sanchez J AU - Pena G AU - Bravo A AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoIPN, CINVESTAV, Guanajuato 36500, MexicoCtr Invest Enfermedades Infecciosas, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoCorp Invest Biol, Medellin 7378, ColombiaINTA, Inst Microbiol & Zool Agr, Buenos Aires, DF, ArgentinaEMBRAPA, Brasilia, DF, BrazilFiocruz MS, Recife, PE, BrazilBravo, A, Univ Nacl Autonoma Mexico, Inst Biotecnol, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Diversity of Bacillus thuringiensis strains from Latin America with insecticidal activity against different mosquito species AB - The characterization of selected Bacillus thuringiensis strains isolated from different Latin America countries is presented. Characterization was based on their insecticidal activity against Aedes aegypti, Culex quinquefasciatus, and Anopheles albimanus larvae, scanning electron microscopy, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and plasmid profiles as well as PCR analysis using novel general and specific primers for cry and cyt genes encoding proteins active against mosquitoes (cyt1, cyt2, cry2, cry4A, cry4B, cry10, cry11, cry17, cry19, cry24, cry25, cry27, cry29, cry30, cry32, cry39, and cry40). Strains LBIT315, LBIT348, and IB604 showed threefold higher mosquitocidal activity against A. aegypti and C. quinquefasciatus larvae than B. thuringiensis subsp. israelensis and displayed high similarities with the B. thuringiensis subsp. israelensis used in this study with regard to protein and plasmid profiles and the presence of cry genes. Strain 147-8906 has activity against A. aegypti similar to that of B. thuringiensis subsp. israelensis but has different protein and plasmid profiles. This strain, harboring cry11, cty30, cyt1, and cyt2 genes, could be relevant for future resistance management interventions. Finally, the PCR screening strategy presented here led us to identify a putative novel cry11B gene MH - Argentina MH - Brazil MH - Colombia MH - Mexico|Guanajuato MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 19 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000185437000030 L2 - SUBSP ISRAELENSIS; CRYSTAL PROTEINS; TOXICITY; GENES; LARVICIDES; CYTA SO - Applied and Environmental Microbiology 2003 ;69(9):5269-5274 8363 UI - 6914 AU - Iglesias-Silva GA AU - Castro-Gomez R AU - Rogers WJ AU - Holste JC AU - Hall KR AD - Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, MexicoHall, KR, Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USA TI - Experimental P-T-p and enthalpy-increment measurements of an equimolar mixture of trichlorofluoromethane (R-11) plus chlorotrifluoromethane (R-13) AB - In this paper, we present experimental liquid densities and enthalpy-increment measurements for an equimolar mixture of trichlorofluoromethane (R-11) + chlorotrifluoromethane (R-13). We use a continuously weighed pycnometer to measure the liquid densities from 230 K to 425 K at pressures up to 69 MPa and a thermoelectric flow calorimeter to measure enthalpy increments from 232 K to 460 K at 4.4 MPa and 6.6 MPa MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000186579200015 SO - Journal of Chemical and Engineering Data 2003 ;48(6):1440-1441 8364 UI - 7829 AU - Iglesias-Silva GA AU - Bonilla-Petriciolet A AU - Eubank PT AU - Holste JC AU - Hall KR AD - Inst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAHall, KR, Inst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, Gto, Mexico TI - An algebraic method that includes Gibbs minimization for performing phase equilibrium calculations for any number of components or phases AB - The most widely used technique for performing phase equilibria calculations is the K-value method (equality of chemical potentials). This paper proposes a more efficient algorithm to achieve the results that includes Gibbs minimization when we know the number of phases. Using the orthogonal derivatives, the tangent plane equation and mass balances, it is possible to reduce the Gibbs minimization procedure to the task of finding the solution of a system of non-linear equations. Such an operation is easier and faster than finding tangents or areas, and appears to converge as fast as the K-value method. Examples illustrate application of the new technique to two and three phases in equilibrium for binary and ternary mixtures. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000184404300007 L2 - phase equilibrium;Gibbs minimization;equation of state;ISOTHERMAL FLASH PROBLEM; EQUAL-AREA RULE; SIMULATED ANNEALING ALGORITHM; TERNARY-SYSTEMS; PURE-COMPONENT; FREE-ENERGY; STABILITY; EQUATIONS; PREDICTION; STATE SO - Fluid Phase Equilibria 2003 ;210(2):229-245 8365 UI - 8311 AU - Imai H AU - Shibata KM AU - Marvel KB AU - Diamond PJ AU - Sasao T AU - Miyoshi M AU - Inoue M AU - Migenes V AU - Murata Y AD - Natl Astron Observ, Mizusawa Astrogeodynam Observ, Mizusawa, Iwate 0230861, JapanNatl Astron Observ, VLBI Explorat Radio Astrometry Project Off, Tokyo 1818588, JapanJoint Inst VLBI Europe, NL-7990 AA Dwingeloo, NetherlandsNatl Astron Observ, VLBI Space Observ Program Project Off, Tokyo 1818588, JapanAmer Astronom Soc, Washington, DC 20009, USAUniv Manchester, MERLIN VLBI Facil, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoInst Space & Astronaut Sci, Kanagawa 2290022, JapanImai, H, Natl Astron Observ, Mizusawa Astrogeodynam Observ, Mizusawa, Iwate 0230861, Japan TI - The three-dimensional kinematics of water masers around the semiregular variable RT Virginis AB - We report observations of water masers around the semiregular variable RT Virginis, which have been made with the Very Long Baseline Array of the National Radio Astronomy Observatory at five epochs, each separated by 3 weeks of time. We detected about 60 maser features at each epoch. Overall, 61 features, detected at least twice, were tracked by their radial velocities and proper motions. The three-dimensional maser kinematics exhibited a circumstellar envelope that is expanding roughly spherically with a velocity of similar or equal to 8 km s(-1). Asymmetries in both the spatial and velocity distributions of the maser features were found in the envelope, but they were less significant than those found in other semiregular variables. Systematic radial velocity drifts of individual maser features were found with amplitudes of less than or equal to2 km s(-1) yr(-1). For one maser feature, we found a quadratic position shift with time along a straight line on the sky. This apparent motion indicates an acceleration with an amplitude of 33 km s(-1) yr(-1), implying the passage of a shock wave driven by the stellar pulsation of RT Vir. The acceleration motion is likely seen only on the sky plane because of a large velocity gradient formed in the accelerating maser region. We estimated the distance to RT Vir to be about 220 pc on the basis of both the statistical parallax and model-fitting methods for the maser kinematics MH - United Kingdom MH - Japan MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183278700042 L2 - masers;radio continuum : stars;stars : individual (RT Virginis);stars : mass loss;stars : oscillations;stars : variables : other;LATE-TYPE STARS; H2O MASERS; CIRCUMSTELLAR ENVELOPE; MERLIN OBSERVATIONS; PROPER MOTIONS; DISTANCE; OUTFLOW; W49N; DISTRIBUTIONS; POSITIONS SO - Astrophysical Journal 2003 ;590(1):460-472 8366 UI - 9212 AU - Infante D AU - Gonzalez G AU - Peraza-Echeverria L AU - Keb-Llanes M AD - Ctr Biotecnol, Inst Estudios Avanzados, Caracas 10151A, VenezuelaUniv Matanzas, Matanzas, CubaCtr Invest Cienf Yucatan, Unidad Biotecnol, Merida, Yucatan, MexicoInfante, D, Ctr Biotecnol, Inst Estudios Avanzados, Carretera Hoyo de la Puerta,Sartenejas,Apdo 17606, Caracas 10151A, Venezuela TI - Asexual genetic variability in Agave fourcroydes AB - Henequen, Agave fourcroydes Lem, is a plant whose fiber is employed in the manufacture of agricultural twine, sacks, carpets and other products. It is a pentaploid (5 x) with a long life cycle of up to 20 years that flower only once towards the end of its life and does not produce viable seeds. Since it is asexually propagated through the production of rhizomes, it would be expected that henequen populations are genetically homogenous. However, an analysis with molecular markers, using amplification fragment length polymorphism (AFLP), demonstrates differences in AFLP pattern in a natural population, while this pattern is conserved in samples from the same plant. An analysis of five different plantations showed differences at the population level, with each population clustering together. The comparison of the AFLP banding pattern between two mother plants with their derived suckers shows that in this species genetic variability is generated and transmitted to descendants through asexual reproduction. Consequently, it is possible to select among individuals in a clonal population for the improvement of henequen. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Cuba MH - Mexico|Yucatan MH - Venezuela PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0168-9452 UR - ISI:000180838400011 L2 - AFLP;Agaves;genetic distance;reproduction;UPGMA;POLYMORPHIC DNA RAPD; CLONAL DIVERSITY; AFLP MARKERS; MUSA SPP.; AAB GROUP; POPULATIONS; PLANTS; SELECTION; PRIMERS; POPULUS SO - Plant Science 2003 ;164(2):223-230 8367 UI - 8678 AU - Infante F AU - Mumford J AU - Garcia-Ballinas A AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv London Imperial Coll Sci Technol & Med, Ascot SL5 7PY, Berks, EnglandInfante, F, El Colegio Frontera Sur, Carretera Antiguo Aeropuerto Km 2-5, Tapachula 30700, Chiapas, Mexico TI - Predation by native arthropods on the African parasitoid Prorops nasuta (Hymenoptera : Bethylidae) in coffee plantations of Mexico MH - United Kingdom MH - Mexico|Chiapas PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000182364700012 SO - Florida Entomologist 2003 ;86(1):86-88 8368 UI - 7729 AU - Iniguez G AU - Vaca P AU - Rowell RM AD - Univ Guadalajara, Guadalajara 44430, Jalisco, MexicoUSDA, Forest Prod Lab, Madison, WI 53705, USAIniguez, G, Univ Guadalajara, Guadalajara 44430, Jalisco, Mexico TI - Tequila, slaughterhouse wastes and composting MH - Mexico|Jalisco MH - USA PB - EMMAUS: JG PRESS, INC RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Soil Science U5 - J;Article AV - English IS - 0276-5055 UR - ISI:000184821200034 SO - Biocycle 2003 ;44(8):57-60 8369 UI - 7765 AU - Iorgovi N AU - Klimyk A AD - Bogolyubov Inst Theoret Phys, UA-03143 Kiev, UkraineUNAM, Inst Math, Cuernavaca 62210, Morelos, MexicoIorgovi, N, Bogolyubov Inst Theoret Phys, UA-03143 Kiev, Ukraine TI - Harmonics on the quantum Euclidean space AB - We study harmonic polynomials on the quantum Euclidean space E-q(N) generated by quantum coordinates x(i), i = 1, 2,..., N, on which the quantum group SOq(N) acts. They are defined as solutions of the equation Delta(q)P = 0, where Delta(q) is the q-Laplace operator on E-q(N). We construct a q-analogue of the classical zonal polynomials and associated spherical polynomials with respect to the quantum subgroup SOq(N - 2). The associated spherical polynomials constitute an orthogonal basis of the spaces of homogeneous harmonic polynomials. They are represented as products of polynomials depending on q-radii and x(j), x(j), j' = N - j + 1. This representation is, in fact, a q-analogue of the classical separation of variables MH - Mexico|Morelos MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000184600900008 L2 - REPRESENTATIONS; POLYNOMIALS SO - Journal of Physics A-Mathematical and General 2003 ;36(27):7545-7558 8370 UI - 8609 AU - Ireta J AU - Neugebauer J AU - Scheffler M AU - Rojo A AU - Galvan M AD - Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoIst Mexicano Petr, Programa Simulac Mol, Mexico City, DF, MexicoIreta, J, Max Planck Gesell, Fritz Haber Inst, Faradayweg 4-6, D-14195 Berlin, Germany TI - Density functional theory study of the cooperativity of hydrogen bonds in finite and infinite alpha-helices AB - We studied the energetics of finite and infinite polyalanine chains in the alpha-helical and extended structure by employing density-functional theory. On the basis of these results we extracted the energy of hydrogen bonds (hb's) and their interactions by taking the full peptide-peptide connectivity (backbone) of proteins into account. We focus on two limiting cases: an isolated hb and one within an infinite alpha-helical chain. In the infinite chain the cooperativity within an infinite network of hb's strengthens each individual bond by more than a factor of 2. This effect has important consequences for the stability of alpha-helices MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000182533600020 L2 - POLY-ATOMIC SYSTEMS; AB-INITIO; ELECTRONIC-STRUCTURE; N-METHYLACETAMIDE; PROTEINS; PSEUDOPOTENTIALS; FORMAMIDE; GLYCINE; LIQUID; WATER SO - Journal of Physical Chemistry B 2003 ;107(6):1432-1437 8371 UI - 8282 AU - Irigoyen-Camacho ME AU - Zepeda-Zepeda MA AU - Maupome G AU - Lopez-Camara V AD - Metroppolitan Autonomous Univ, Xochimilco, Dept Hlth Sci, Mexico City, DF, MexicoCtr Hlth Res, Hlth Serv Res Program, Portland, OR, USAIrigoyen-Camacho, ME, Univ Autonoma Metropolitana X, Calzada Hueso 1100,Cot Villa Quietud, Mexico City 04960, DF, Mexico TI - Attitudes of a group of Mexico City residents toward HIV/AIDS in the dental office AB - Objective: To ascertain the intention of the public to undergo dental treatment at dental clinics where other patients or a dentist are infected with HIV/AIDS. Study design: A cross-sectional design was used to interview a stratified sample of persons 18 years and older in Mexico City with use of a standardized questionnaire. Questions included the type of dental service used, the perception of risk for HIV/AIDS contagion in the dental environment, and the reported intention to continue treatment in a dental office where patients or a dentist were affected by HIV/AIDS. Results: Of the 490 participants, 74.9% were concerned about HIV/AIDS transmission in the dental office. Only 21.2% intended to continue treatment at a dental office where HIV/AIDS patients were treated, and only 20.0% intended to continue treatment when the dentist was HIV-positive. The degree of concern about HIV/AIDS contagion and the modality of dental service used were associated with the stated intention to continue dental treatment. Conclusions: There is a need to have good infection control standards in dental practice; to increase public trust in such standards by making them more apparent: and/or to establish educational programs to improve public knowledge and attitudes toward HIV/AIDS risks in dental practice MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0196-6553 UR - ISI:000183363200006 L2 - INFECTION-CONTROL PRACTICES; POSITIVE PATIENTS; HIV; DENTISTS; AIDS; TRANSMISSION; INDIVIDUALS; PERCEPTION; SERVICES SO - American Journal of Infection Control 2003 ;31(4):231-236 8372 UI - 7483 AU - Irvine WM AU - Carraminana A AU - Carrasco L AU - Schloerb FP AD - Univ Massachusetts, Dept Astron, Amherst, MA 01003, USAUniv Massachusetts, Five Coll Radio Astron Observ, Amherst, MA 01003, USAInst Nacl Astrofis Opt & Elect, Puebla, MexicoIrvine, WM, Univ Massachusetts, Dept Astron, Amherst, MA 01003, USA TI - The Large Millimeter Telescope El Gran Telescopio Milimetrico: A new instrument for astrobiology AB - The Instituto Nacional de Astrofisica, Optica y Electronica in Mexico and the University of Massachusetts in the U.S.A. are collaborating to build the world's largest radio telescope that operates at short millimeter wavelengths. This facility, known as the Large Millimeter Telescope (LMT) or el Gran Telescopio Milimetrico (GTM), is being sited at an altitude of 4600 m on Volcan Sierra Negra in the Mexican state of Puebla. The telescope will be a fully steerable dish with a diameter of 50 m and a surface consisting of 180 panels that are actively adjusted under computer control to correct for deformations due to gravity and temperature gradients. Instruments will include focal plane arrays to image both continuum and spectral line emission from celestial sources. The LMT/GTM will be an extremely powerful facility for studies encompassing almost all areas of astronomy, including astrobiology. In particular, the high sensitivity, angular resolution, and mapping speed will enable detailed investigations of the organic chemistry of interstellar molecular clouds, protoplanetary disks, and comets MH - Mexico|Puebla MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0169-6149 UR - ISI:000185359600004 L2 - astrobiology;comets;interstellar chemistry;molecular clouds;radio astronomy;radio telescope;MOLECULES; ORIGIN; EARTH SO - Origins of Life and Evolution of the Biosphere 2003 ;33(6):597-607 8373 UI - 7572 AU - Ishiwata K AU - Camacho SPD AU - Ogata K AU - Nakamura-Uchiyama F AU - Hiromatsu K AU - Nawa Y AD - Miyazaki Med Coll, Dept Parasitol, Miyazaki 8891692, JapanUniv Autonoma Sinaloa, Fac Ciencias Quimicobiol, Sinaloa, MexicoMiyazaki Med Coll, Dept Dermatol, Miyazaki 8891692, JapanNawa, Y, Miyazaki Med Coll, Dept Parasitol, Miyazaki 8891692, Japan TI - Evaluation of the antigenic similarities of adult-worm extracts from three Gnathostoma species, using sera from Mexican and Japanese patients with Gnathostoma infections AB - The antigenic similarities of adult-worm extracts of Gnathostoma spinigerum, G. hispidum and G. doloresi, all of which are important food-borne parasites causing larva migrans in humans, were evaluated. The 40 sera used came from gnathostomiasis cases in Mexico, where G. binucleatum is endemic, or in Japan, where G. doloresi predominates. When used as the fixed antigens in microplate-ELISA, the adult-worm extracts from the three different species of Gnathostoma were found to have equal binding capacity to the Gnathostoma-specific IgG antibodies in the sera of the Mexican and Japanese patients. The correlation coefficients for the optical densities seen in the ELISA, between any two of the three Gnathostoma extracts, were all > 0.900. The dose-response curves produced when four sera were tested, in the microplate-ELISA, against the three different Gnathostoma extracts were nearly identical, indicating that the antigens in each of the extracts had similar avidity. Furthermore, the results of competitive-inhibition ELISA indicated that the antigenic specificities of the three extracts were almost identical. An antigen of 40 kDa, which SDS-PAGE and immunoblot analysis revealed to be present in all three extracts, was recognized by the sera from the gnathostomiasis cases. When the sera were investigated by dot-blot ELISA, they also gave similar results whichever extract was used as the antigen source. It appears that, in the serodiagnosis of gnathostomiasis by microplate- or dot-ELISA, each of the three adult-worm extracts would be equally useful, regardless of the causative species of Gnathostoma MH - Japan MH - Mexico|Sinaloa PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health;Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0003-4983 UR - ISI:000185139900010 L2 - TRAVELER; AMERICA SO - Annals of Tropical Medicine and Parasitology 2003 ;97(6):629-637 8374 UI - 8427 AU - Islas JR AU - Pimienta V AU - Micheau JC AU - Buhse T AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Toulouse 3, Lab IMRCP, CNRS, UMR 5623, F-31062 Toulouse, FranceBuhse, T, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Kinetic analysis of artificial peptide self-replication. Part I: The homochiral case AB - Computational kinetic analysis of a lately discovered homochiral peptide self-replicator is presented. A 6-step kinetic model was designed that addresses the main reactions and hydrophobic interactions involved in this template-directed, autocatalytic system and that gave rise to excellent fitting of 4 previously published independent experimental series. The model sheds light on the mechanistic principle of the reaction system and illustrates directly a number of dynamic properties such as the observed autocatalytic efficiency. It was found that the dynamics are basically governed by two reversible hydrophobic interactions: between the template and a peptide fragment and between two template species. The later association was determined to be considerably more favored, which leads to the predominant presence of the catalytically inactive template dimer in the reaction system. Our results show that the involvement of a template trimer is not necessary to obtain the observed fittings. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biophysics;Chemistry, Physical U5 - J;Article AV - English IS - 0301-4622 UR - ISI:000182932800001 L2 - self-replication;peptide;kinetic analysis;autocatalysis;template-directed catalysis;molecular evolution;computational modeling;MOLECULAR REPLICATION; ALTERNATIVE MECHANISM; SYSTEMS; AUTOCATALYSIS; NETWORKS; LIGATION; LINKAGE; GROWTH SO - Biophysical Chemistry 2003 ;103(3):191-200 8375 UI - 8428 AU - Islas JR AU - Pimienta V AU - Micheau JC AU - Buhse T AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Toulouse 3, Lab IMRCP, CNRS, UMR 5623, F-31062 Toulouse, FranceBuhse, T, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Kinetic analysis of artificial peptide self-replication. Part II: The heterochiral case AB - A kinetic model has been designed to describe and to analyze the stereoselective behavior of a recently discovered heterochiral template-directed peptide self-replicator by Ghadiri and co-workers, [Nature 409 (2001) 797-801]. It turned out that previous assumptions stating that exclusively homochiral species participate in a stereoselective and autocatalytic pathway and that heterochiral species originate only from uncatalyzed background reactions could not be validated by our model. On the contrary, excellent fitting of experimental data indicated that the whole combinatorial variety of possible cross-catalytic processes involving L- and D- peptide species play an important role and need to be taken into account. The system shows no net creation of chiral matter but only a redistribution of the initially present chiral material. Both, the separation of an optically inactive meso-type template dimer and a slight chiroselective autocatalytic effect, contribute to a predicted amplification of enantiomeric excess that, in some cases, can simultaneously result in a substantial amount of optically active matter. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biophysics;Chemistry, Physical U5 - J;Article AV - English IS - 0301-4622 UR - ISI:000182932800002 L2 - self-replication;peptide;kinetic analysis;autocatalysis;stereoselectivity;amplification of enantiomeric excess;biomolecular homochirality;chiroselective autocatalytic effect;CHIRAL-SYMMETRY-BREAKING; BIOMOLECULAR CHIRALITY; MOLECULAR REPLICATION; CRYSTALLIZATION; AUTOCATALYSIS; ORIGIN; DESIGN SO - Biophysical Chemistry 2003 ;103(3):201-211 8376 UI - 6525 AU - itez-Malvido J AU - Martinez-Ramos M AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58190, Michoacan, MexicoINPA, Biol Dynam Forest Fragments Project, BR-69011970 Manaus, Amazonas, BrazilBenitez-Malvido, J, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Antigua Carretera Patzcuaro 8701,Ex Hacienda San, Morelia 58190, Michoacan, Mexico TI - Influence of edge exposure on tree seedling species recruitment in tropical rain forest fragments AB - Edge creation has a pronounced influence on the understory vegetation, but the effects of edges on seedling species recruitment are still poorly understood. In Central Amazonia, 9-19 years after fragmentation, we recorded species richness and net seedling recruitment rate in I ha blocks exposed to none, one, or multiple edges within forest fragments. One-hectare blocks were located in the center (no edge), the edge (one edge), the corners (two edges) of 10 and 100 ha fragments, and in a I ha fragment (four edges). In 1991, we counted all tree seedlings 5-100 cm tall found within permanent 1 m(2) plots located within the I ha blocks. In May 1993, we manually removed all seedlings that were smaller than I in tall from the permanent plots. Six years and five months later (October 1999), all new seedlings recruited into the plots were counted and classified into distinct morphospecies. Species richness of recruited seedlings, scaled by total seedling density, declined from the center to the edge, the corner blocks, and then to the I ha fragment. Overall, the four-edged, I ha fragment had the poorest species richness and the non-edged 100 ha central block the highest. The total number of recruited individuals was 40 percent less than that previously present, with the 100 ha corner having the lowest recruitment. Pairwise comparisons showed that species similarity was related to edge number for the 100 and I ha fragments. Species rank/abundance curves showed that a subset of species was common in all blocks within the fragments, and that the 100 ha center held more rare species than any other I ha block. This study demonstrated that, in a given fragment patch, the number of tree seedling species recruited varied inversely with the number of edges MH - Brazil MH - Mexico|Michoacan PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 11 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000188002400008 L2 - Amazon;edge effects;fragmentation;seedling recruitment;tropical rain forest;CENTRAL AMAZONIAN FOREST; HABITAT FRAGMENTS; DIVERSITY; COMMUNITIES; BIODIVERSITY; VEGETATION; RICHNESS; IMPACT; MICROCLIMATE; CONSERVATION SO - Biotropica 2003 ;35(4):530-541 8377 UI - 8878 AU - itez-Malvido J AU - Martinez-Ramos M AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 59180, Michoacan, MexicoInst Nacl de Pesquisas da Amazonia, Biol Dynam Forest Fragments Project, BR-69011970 Manaus, Amazonas, BrazilBenitez-Malvido, J, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Antigua Carretera Patzcuaro 8701,Ex Hacienda San, Morelia 59180, Michoacan, Mexico TI - Impact of forest fragmentation on understory plant species richness in Amazonia AB - Forest fragmentation in the tropics severely affects large trees, but its effect on other life stages and plant life forms is poorly understood. In Central Amazonia, 9 to 19 years after fragmentation, we recorded species richness and net seedling recruitment rate in forest fragments of 1, 10, and 100 ha and in continuous forest. In 1991 all seedlings 5-100 cm tall within permanent 1-m(2) plots in fragments and continuous forest were counted and grouped into tree, liana, palm, and herb life-form classes. In 1993 we manually removed all seedlings that were <1 m tall from the permanent plots. Six years and 5 months later (1999), all new seedlings recruited into the plots were counted, grouped into different life forms, and classified into distinct morphospecies. The species richness of recruited tree, liana, herb, and palm seedlings was lower in forest fragments than in continuous forest, with the 1-ha fragment having the poorest species richness. The total number of recruited individuals was 40% less than that previously present for all life forms, except lianas. Liana recruitment was 7% to 500% higher than the original abundance in the forest fragments and continuous forest. In general, species similarity was higher among fragments than between fragments and continuous forest, with the 1-ha fragment being less similar. Species rank/abundance curves showed that continuous forest species in all life forms tended to disappear in forest fragments, whereas common species in forest fragments were absent from continuous forest. Overall, our results suggest that the life-form composition and structure of the regenerative plant pool in fragments were shifting toward a species-poor seedling community. Losses of understory species diversity, but especially of tree seedlings, threaten the maintenance of rainforest biodiversity and compromise future forest regeneration MH - Brazil MH - Mexico|Michoacan PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 31 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000181736400009 L2 - TROPICAL RAIN-FOREST; RED HOWLER MONKEYS; TREE COMMUNITIES; FIRME FOREST; RECRUITMENT; DYNAMICS; CONSERVATION; BIODIVERSITY; REGENERATION; SEEDLINGS SO - Conservation Biology 2003 ;17(2):389-400 8378 UI - 7035 AU - ito-Leon J AU - Morales JM AU - Rivera-Navarro J AU - Mitchell AJ AD - Mostoles Gen Hosp, Dept Neurol, Madrid, SpainMinist Labour & Social Affairs, Dept Res, Madrid, SpainUniv Veracruzana, Fac Social Work, Veracruz, MexicoUniv Leeds, Acad Unit Psychiat, Leeds, W Yorkshire, EnglandBenito-Leon, J, Avda Constituc 73,Portal 3,7 Izquierda, E-28820 Madrid, Spain TI - A review about the impact of multiple sclerosis on health-related quality of life AB - Purpose: There is increasing recognition that the global wellbeing of patients with chronic neurological disease is an important outcome in research and clinical practice alike. Many studies involving individuals with multiple sclerosis have demonstrated that the overall wellbeing is not a simple manifestation of impairment or disability. The strongest correlations with health-related quality of life appear to be patient rated emotional adjustment to illness and patient rated handicap. In recent years, health-related quality of life questionnaires that measure the physical, social, emotional, and occupational impact of illness have been developed and validated in populations with MS. Most questionnaires are now available in a range of languages. This development is likely to lead to increasing recognition of neuropsychiatric complications of MS in clinical practice and better quanti. cation of treatment responses in clinical trials. Conclusion: Further work is required to decide which scale is most suited to which purpose. Assessment of multiple sclerosis-specific health-related quality of life should be included in future clinical trials to provide a complete picture of patients' health status MH - United Kingdom MH - Mexico|Veracruz MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 21 U4 - Rehabilitation U5 - J;Review AV - English IS - 1464-5165 UR - ISI:000186547100001 L2 - SECONDARY PROGRESSIVE MS; STATUS SCALE EDSS; FUNCTIONAL COMPOSITE; OUTCOME MEASURE; INPATIENT REHABILITATION; PSYCHOMETRIC PROPERTIES; COGNITIVE DYSFUNCTION; INTERFERON BETA-1B; CLINICAL-TRIAL; DISABILITY SO - Disability and Rehabilitation 2003 ;25(23):1291-1303 8379 UI - 8230 AU - Ito A AU - Yamasaki H AU - Nakao M AU - Sako Y AU - Okamoto M AU - Sato MO AU - Nakaya K AU - Margono SS AU - Ikejima T AU - Kassuku AA AU - Afonso SMS AU - Ortiz WB AU - Plancarte A AU - Zoli A AU - Geerts S AU - Craig PS AD - Asahikawa Med Coll, Dept Parasitol, Asahikawa, Hokkaido 0788510, JapanUniv Salford, Sch Environm & Life Sci, Biosci Res Inst, Manchester, EnglandInst Trop Med Prince Leopold, B-2000 Antwerp, BelgiumUniv Dschang, Dschang, CameroonUniv Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoUniv Cent Ecuador, Ctr Int Zoonosis, Quito, EcuadorEduardo Mondlane Univ, Fac Vet, Para Clin Dept, Maputo, MozambiqueSokoine Univ Agr, Dept Vet Microbiol & Parasitol, Morogoro, TanzaniaShenyang Pharmaceut Univ, China Japan Inst Med & Pharmaceut Sci, Shenyang, Peoples R ChinaUniv Indonesia, Fac Med, Dept Parasitol, Jakarta, IndonesiaAsahikawa Med Coll, Anim Lab Med Res, Asahikawa, Hokkaido 078, JapanTottori Univ, Sch Vet Med, Dept Lab Anim Sci, Tottori 680, JapanIto, A, Asahikawa Med Coll, Dept Parasitol, Asahikawa, Hokkaido 0788510, Japan TI - Multiple genotypes of Taenia solium - ramifications for diagnosis, treatment and control AB - Mitochondrial DNA sequences of Taenia solium have fully been analyzed. Analysis of the full length of cytochrome c oxidase subunit 1 (1620 bp) and cytochrome b (1068 bp) genes of T solium, isolated from Asia (China, Thailand, Indonesia and India), from Latin America (Mexico, Ecuador, Bolivia, Peru and Brazil) and from Africa (Tanzania, Mozambique and Cameroon), has revealed that the two phylogenies obtained were similar to each other regardless of the genes examined. The isolates from Asia formed a single cluster, whereas those from Latin America combined with those from Africa to form an additional cluster. It was estimated that these two genotypes emerged approximately 4-8 x 10(5) years ago. These results together with recent study of the ancient of human taeniid cestodes emerged several MYA in Africa, historical data on swine domestication, distribution of pigs and colonization patterns suggest that T solium was introduced recently into Latin America and Africa from different regions of Europe during the colonial age, which started 500 years ago, and that T solium of another origin independently spread in Asian countries, perhaps from China. Why did not T solium of European origin invade or spread into Asia during the colonial age? Analysis of T. solium distribution must include other Taenia species, especially T saginata and T asiatica, which can not be differentiated from each other morphologically. BESS T-base analysis for differentiation of all human Taenia species including the two genotypes of T. solium, and T saginata and T asiatica has also been characterized. BESS T-base analysis differentiates African isolates from Latin American isolates as well but more samples should be analyzed for obtaining conclusive evidence for the latter. Serological analysis of cyst fluid of T solium cysticerci obtained in China and Indonesia and from Mozambique and Ecuador indicates geographical differences in their banding patterns. These differences are discussed in the light of possible differences in pathology of T solium worldwide. As it has been speculated that the ancient T. solium emerged several million years ago in Africa, it is necessary to analyze more isolates from Africa. Such working hypothesis may be evaluated combined with symptomatology and serology when we get additional DNA data from such areas, since there are some varieties of manifestation of neurocysticercosis with or without subcutaneous cysticercosis and of antigens of cyst fluid of T solium from Asia and from Africa and/or America. Transfer of techniques of molecular identification and sero- and immuno-diagnoses between researchers and technicians from endemic countries using their own materials should be promoted with the aim of better international cooperation for the control of cysticercosis. (C) 2003 Elsevier Science B.V. All rights reserved MH - Belgium MH - Cameroon MH - Ecuador MH - United Kingdom MH - Indonesia MH - Japan MH - Mexico|Distrito Federal MH - Mozambique MH - Peoples R China MH - Tanzania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000183576700013 L2 - Taenia solium;cestode zoonosis;cysticercosis;taeniosis;mitochondrial DNA;DNA polymorphism;PHYLOGENETIC HYPOTHESIS; DIFFERENTIAL-DIAGNOSIS; HUMAN CYSTICERCOSIS; MITOCHONDRIAL-DNA; TAIWAN TAENIA; RIBOSOMAL DNA; NEUROCYSTICERCOSIS; SEQUENCE; CESTODE; CYCLOPHYLLIDEA SO - Acta Tropica 2003 ;87(1):95-101 8380 UI - 8660 AU - Iturbide-Sanchez F AU - Jardon-Aguilar H AU - Tirado-Mendez JA AD - Univ Massachusetts, Lab Millimeter & Microwave Devices & Applicat, Amherst, MA 01003, USAIPN, Ctr Res & Adv Studies, Telecommun Sect, Mexico City 07360, DF, MexicoIturbide-Sanchez, F, Univ Massachusetts, Lab Millimeter & Microwave Devices & Applicat, Amherst, MA 01003 USA TI - Cancellation of sub-harmonic and second harmonic components to improve the linearity of a low-power consumption LNA using SiGeHBT AB - Three simple methods to improve the third-order intercept point (IP3) of a low-noise amplifier (LNA) for personal communication systems (PCS) applications or CDMA cellular handsets are introduced. Both simulations and results from previous works in the literature are compared in order to demonstrate the effectiveness of these methods in improving the performance of the LNA in terms of linearity when low-bias voltage is used. The LNA was designed to operate at 1.9 GHz, using a silicon germanium (SiGe) heterojunction bipolar transistor (HBT) and 2.4 V bias voltage. (C) 2003 Wiley Periodicals, Inc MH - USA MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000182325700024 L2 - high linearity;LNA;SiGeHBT;TRANSISTOR SO - Microwave and Optical Technology Letters 2003 ;37(4):308-311 8381 UI - 7296 AU - Iturriaga MH AU - Escartin EF AU - Beuchat LR AU - Martinez-Peniche R AD - Univ Autonoma Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, Queretaro, MexicoUniv Georgia, Ctr Food Safety, Griffin, GA 30223, USAUniv Georgia, Dept Food Sci & Technol, Griffin, GA 30223, USAEscartin, EF, Univ Autonoma Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, Apartado Postal 796, Queretaro, Mexico TI - Effect of inoculum size, relative humidity, storage temperature, and ripening stage on the attachment of Salmonella Montevideo to tomatoes and tomatillos AB - The influence of inoculum populations and environmental factors on attachment of Salmonella Montevideo to the surface of tomatoes and tomatillos was evaluated. To study the effect of inoculum size, red, ripe tomatoes were spot-inoculated with bacterial suspensions (10(5) and 10(8) CFU/fruit) and stored at 22degreesC under 100% relative humidity. The effects of temperature (12, 22, and 30degreesC) and relative humidity (75, 85, and 97%) on attachment of the pathogen (10(7) CFU/fruit) to tomatoes (red and green) and ripe tomatillos were also evaluated. Inoculated fruits were stored for 90 min at all combinations of temperature and relative humidity, and after rinsing with water, the number of cells attached to the surface was determined. Salmonella Montevideo attached to the surface of tomatoes within 90 min. A direct correlation between the number of attached cells and the population in the inoculum was observed. The percentage of cells that attached immediately after inoculation was approximately 0.3% for the three test products. After storage for 90 min at various temperature and relative humidity conditions, the number of adhering cells ranged from 4.0 to 5.4 log CFU/fruit (1.2% of inoculum). Both the type of product and the temperature/relative humidity combination had a significant (P < 0.05) effect on attachment of Salmonella Montevideo to the surfaces of tomatoes and tomatillos. Scanning electron micrographs of the cuticles of inoculated washed tomatoes and tomatillos revealed typical skin cell patterns, and only a few randomly dispersed Salmonella Montevideo were observed. Deposition of Salmonella Montevideo on the surface of tomatoes and tomatillos could result in attachment and subsequent colonization under suitable conditions MH - Mexico|Queretaro MH - USA PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000185821500002 L2 - ESCHERICHIA-COLI O157-H7; SCANNING LASER MICROSCOPY; LISTERIA-MONOCYTOGENES; CHLORINE TREATMENT; STAINLESS-STEEL; BACTERIA; GROWTH; SURFACES; SANITIZER; OUTBREAK SO - Journal of Food Protection 2003 ;66(10):1756-1761 8382 UI - 9250 AU - Iturriaga R AU - Khanin K AD - Ctr Invest Matemat, Guanajuato 36000, MexicoUniv Cambridge, Isaac Newton Inst Math Sci, Cambridge CB3 0EH, EnglandHeriot Watt Univ, Dept Math, Edinburgh, Midlothian, ScotlandLD Landau Theoret Phys Inst, Moscow, RussiaIturriaga, R, Ctr Invest Matemat, Apartado Postal 402, Guanajuato 36000, Mexico TI - Burgers turbulence and random Lagrangian systems AB - We consider a spatially periodic inviscid random forced Burgers equation in arbitrary dimension and the random time-dependent Lagrangian system related to it. We construct a unique stationary distribution for "viscosity" solutions of the Burgers equation. We also show that with probability 1 there exists a unique minimizing trajectory for the random Lagrangian system which generates a non-trivial ergodic invariant measure for the non-random skew-product extension of the Lagrangian system MH - United Kingdom MH - Mexico|Guanajuato MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0010-3616 UR - ISI:000180896900001 L2 - INVARIANT-MEASURES; RANDOM-FORCE; EQUATION; INTERMITTENCY; ERGODICITY; MODEL SO - Communications in Mathematical Physics 2003 ;232(3):377-428 8383 UI - 8067 AU - Itzkowitz GL AU - Morris SA AU - Tkachuk VV AD - CUNY Queens Coll, Dept Math, Flushing, NY 11367, USAUniv Ballarat, Sch Informat Technol & Math Sci, Ballarat, Vic 3353, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, Mexico TI - Cardinalities of locally compact groups and their stone-cech compactifications AB - If G is any Hausdorff topological group and betaG is its Stone-Cech compactification, then \G\ less than or equal to \betaG\ less than or equal to 2(2\G\) where \G\ denotes the cardinality of G. It is known that if G is a discrete group then \betaG\ = 2(2\G\) and if G is the additive group of real numbers with the Euclidean topology, then \betaG\ = 2(\G\). In this paper the cardinality and weight of betaG, for a locally compact group G, is calculated in terms of the character and Lindelof degree of G. The results make it possible to give a reasonably complete description of locally compact groups G for which \betaG\ = 2(\G\) or even \betaG\ = \G\ MH - Australia MH - Mexico|Distrito Federal MH - USA PB - CANBERRA: AUSTRALIAN MATHEMATICS PUBL ASSOC INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0004-9727 UR - ISI:000183957700001 L2 - TOPOLOGICAL-GROUPS SO - Bulletin of the Australian Mathematical Society 2003 ;67(3):353-364 8384 UI - 8613 AU - Ivlev BI AU - Cardenas JJR AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAIvlev, BI, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Compression fluctuations of chain molecules AB - Thermal compression fluctuations of a long molecule, like DNA, are accounted when a bead is attached to the end of the molecule. When the bead is acted by some trapping (attractive) potential produced, for example, by optical tweezers, this potential can be essentially renormalized due to compression thermal fluctuations of the long molecule. The effective potential may turn over into a repulsive one for a sufficiently long molecule. The effect should be taken into account for an analysis of bead fluctuations. (C) 2003 American Institute of Physics MH - Mexico|San Luis Potosi MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000182454100049 L2 - SINGLE DNA-MOLECULES; STATISTICAL-MECHANICS; RELAXATION DYNAMICS; SUPERCOILED DNA; B-DNA; ELASTICITY; TENSION; BINDING SO - Journal of Chemical Physics 2003 ;118(18):8521-8524 8385 UI - 9126 AU - Jackson VP AU - San Martin JA AU - Secrest RJ AU - McNabb M AU - Carranza-Lira S AU - Figueroa-Casas P AU - Fernandes CE AU - Romaguera J AD - Eli Lilly & Co, Lilly Corp Ctr, Indianapolis, IN 46285, USAIndiana Univ, Sch Med, Indianapolis, IN, USAMedico Sur, Mexico City, DF, MexicoUniv Nacl Rosario, Hosp Saenz Pena, RA-2000 Rosario, ArgentinaHosp Perola Byington, Sao Paulo, BrazilUniv Puerto Rico, Sch Med, San Juan, PR 00936, USASecrest, RJ, Eli Lilly & Co, Lilly Corp Ctr, Indianapolis, IN 46285, USA TI - Comparison of the effect of raloxifene and continuous-combined hormone therapy on mammographic breast density and breast tenderness in postmenopausal women AB - OBJECTIVE: The objectives were to evaluate mammographic changes in breast density that are associated with raloxifene or hormone therapy and to compare the safety profiles of the two therapies. STUDY DESIGN: Postmenopausal women older than 60 years who had a bone mineral density T-score of less than or equal to-1 were assigned randomly to receive raloxifene hydrochloride 60 mg/day or continuous-combined hormone therapy that consisted of conjugated equine estrogen 0.625 mg/day plus medroxyprogesterone acetate 2.5 mg/day in a 1-year, open-label study. Radiologists who were blinded to the treatment assignment assessed the mammograms according to the American College of Radiology Breast Image Reporting and Data System breast density categories. Breast density changes were analyzed for treatment differences. RESULTS: After 12 months of treatment, 0.9% of the women who received raloxifene had increased mammographic breast density compared with 27.4% of the women who received continuous-combined hormone therapy (P <.001). In the continuous-combined hormone therapy group, 77% of the women reported breast tenderness at any time during the study, compared to 22% of the women in the raloxifene group. CONCLUSION: In postmenopausal women with low bone mass, raloxifene therapy for 12 months does not increase mammographic breast density, whereas continuous-combined hormone therapy substantially increases breast density in a significant number of women MH - Argentina MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 9 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000181139800017 L2 - raloxifene;breast;cominuous-combined hormone therapy;breast density;breast tenderness;REPLACEMENT THERAPY; PARENCHYMAL DENSITY; ESTROGEN-PROGESTIN; SCREENING TRIAL; CLINICAL-TRIAL; CANCER RISK; FOLLOW-UP; MORTALITY SO - American Journal of Obstetrics and Gynecology 2003 ;188(2):389-394 8386 UI - 8855 AU - Jacobs J AU - Jonas WB AU - Jimenez-Perez M AU - Crothers D AD - Univ Washington, Sch Publ Hlth & Community Med, Dept Epidemiol, Seattle, WA 98195, USASamueli Inst Informat Biol, Alexandria, VA, USAUniformed Serv Univ Hlth Sci, Bethesda, MD 20814, USAUniv Guadalajara, Dept Publ Hlth, Hlth Sci Ctr, Guadalajara 44430, Jalisco, MexicoEvergreen Ctr Homeopath Med, Edmonds, WA, USAJacobs, J, 23200 Edmonds Way, Edmonds, WA 98026, USA TI - Homeopathy for childhood diarrhea: combined results and metaanalysis from three randomized, controlled clinical trials AB - Background. Previous studies have shown a positive treatment effect of individualized homeopathic treatment for acute childhood diarrhea, but sample sizes were small and results were just at or near the level of statistical significance. Because all three studies followed the same basic study design, the combined data from these three studies were analyzed to obtain greater statistical power. Methods. Three double blind clinical trials of diarrhea in 242 children ages 6 months to 5 years were analyzed as 1 group. Children were randomized to receive either an individualized homeopathic medicine or placebo to be taken as a single dose after each unformed stool for 5 days. Parents recorded daily stools on diary cards, and health workers made home visits daily to monitor children. The duration of diarrhea was defined as the time until there were less than 3 unformed stools per day for 2 consecutive days. A metaanalysis of the effect-size difference of the three studies was also conducted. Results. Combined analysis shows a duration of diarrhea of 3.3 days in the homeopathy group compared with 4.1 in the placebo group (P = 0.008). The metaanalysis shows a consistent effect-size difference of similar to0.66 day (P = 0.008). Conclusions. The results from these studies confirm that individualized homeopathic treatment decreases the duration of acute childhood diarrhea and suggest that larger sample sizes be used in future homeopathic research to ensure adequate statistical power. Homeopathy should be considered for use as an adjunct to oral rehydration for this illness MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000181825100004 L2 - homeopathy;childhood diarrhea;complementary and alternative medicine;DEVELOPING-COUNTRIES; MEDICINE; CHILDREN; MANAGEMENT; PREVALENCE; DISEASE; NEPAL SO - Pediatric Infectious Disease Journal 2003 ;22(3):229-234 8387 UI - 9537 AU - Jahn OJ AU - Davila G AU - Romero D AU - Noel KD AD - Marquette Univ, Dept Biol, Milwaukee, WI 53201, USACtr Invest Sobre Fijac Nitrogeno, Program Evoluc Mol, Cuernavaca, Morelos, MexicoCtr Invest Sobre Fijac Nitrogeno, Program Genet Mol Plasmidos Bacterianos, Cuernavaca, Morelos, MexicoNoel, KD, Marquette Univ, Dept Biol, POB 1881, Milwaukee, WI 53201, USA TI - BacS: An abundant bacteroid protein in Rhizobium etli whose expression ex planta requires nifA AB - Rhizobium etli CFN42 bacteroids from bean nodules possessed an abundant 16-kDa protein (BacS) that was found in the membrane pellet after cell disruption. This protein was not detected in bacteria cultured in tryptone-yeast extract. In minimal media, it was produced at low oxygen concentration but not in a mutant whose nifA was disrupted. N-terminal sequencing of the protein led to isolation of a bacS DNA fragment. DNA hybridization and nucleotide sequencing revealed three copies of the bacS gene, all residing on the main symbiotic plasmid of strain CFN42. A stretch of 304 nucleotides, exactly conserved upstream of all three bacS open reading frames, had very close matches with the NifA and sigma 54 consensus binding sequences. The only bacS homology in the genetic sequence databases was to three hypothetical proteins of unknown function, all from rhizobial species. Mutation and genetic complementation indicated that each of the bacS genes gives rise to a BacS polypeptide. Mutants disrupted or deleted in all three genes did not produce the BacS polypeptide but were Nod(+) and Fix(+) on Phaseolus vulgaris MH - Mexico|Morelos MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000179860800007 L2 - GRAM-NEGATIVE BACTERIA; LEGUMINOSARUM BV PHASEOLI; SYMBIOTIC PLASMID; ENVIRONMENTAL-CONDITIONS; NITROGEN-FIXATION; CLONING VECTORS; LIPOPOLYSACCHARIDE; SEQUENCES; DNA; SPECIFICITY SO - Molecular Plant-Microbe Interactions 2003 ;16(1):65-73 8388 UI - 8746 AU - Janakiraman V AU - Ettinger A AU - Mercado-Garcia A AU - Hu H AU - Hernandez-Avila M AD - Brigham & Womens Hosp, Dept Obstet & Gynecol, Boston, MA 02115, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Environm Epidemiol Program, Boston, MA 02115, USANatl Inst Publ Hlth Mexico, Ctr Populat Hlth Res, Cuernavaca, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USAJanakiraman, V, Brigham & Womens Hosp, Dept Obstet & Gynecol, 75 Francis St, Boston, MA 02115 USA TI - Calcium supplements and bone resorption in pregnancy - A randomized crossover trial AB - Background: Pregnancy is a time of increased need for calcium. The role of calcium supplements in altering maternal responses to fetal demand for calcium is not fully understood. This article describes the results of a randomized, crossover trial of calcium supplementation on bone resorption among pregnant women. Design Setting/Each Participants: Thirty-one Mexican women at 25-35 weeks gestation participated in the study for 20 days. Each woman received a 1200 mg calcium supplement on 10 consecutive days and a multivitamin without calcium for 10 days. Urine samples were collected daily. Two pooled specimens from each subject (representing urine from multivitamin days and from calcium days) were preserved, and levels of cross-linked, N-telopeptides of type I collagen (NTX), "biomarker of bone resorption, were measured. Dietary calcium intake was assessed using "food-frequency questionnaire. Results: Of the 31 participants, 27 (87.1%) showed reductions in urinary NTX levels while ingesting calcium supplements. When not ingesting calcium, NTX levels for the 31 subjects had a mean of 96.8 nM BCE/mM creatinine; this was significantly higher (p<0.001) than the mean urinary NTX levels of 83.2 nM BCE/mM creatinine during ingestion of the calcium supplements. Neither age nor dietary calcium intake was a significant predictor of treatment effect. Conclusion: A bedtime, 1200-mg calcium supplement during the third trimester of pregnancy reduces maternal bone resorption by an average of 13.6 nM BCE/mM creatinine (14%), as reflected by urinary NTX levels. These results suggest that calcium supplements reduce maternal skeletal-bone turnover during the third trimester of pregnancy MH - USA MH - Mexico|Morelos PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Public, Environmental & Occupational Health;Medicine, General & Internal U5 - J;Article AV - English IS - 0749-3797 UR - ISI:000182213700008 L2 - LEAD LEVELS; I COLLAGEN; LACTATION; TURNOVER; DENSITY; WOMEN; HOMEOSTASIS; MEXICO; BLOOD; RISK SO - American Journal of Preventive Medicine 2003 ;24(3):260-264 8389 UI - 7612 AU - Janik J AU - Harmanec P AU - Lehmann H AU - Yang S AU - Bozic H AU - Ak H AU - Hadrava P AU - Eenens P AU - Ruzdjak D AU - Sudar D AU - Hubeny I AU - Linnell AP AD - Masaryk Univ, Fac Sci, Inst Theoret Phys & Astrophys, CS-61137 Brno, Czech RepublicCharles Univ, Astron Inst, CR-18000 Prague 8, Czech RepublicAcad Sci Czech Republ, Inst Astron, CS-25165 Ondrejov, Czech RepublicThuringer Landessternwarte Tautenburg, D-07778 Tautenburg, GermanyUniv Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, CanadaUniv Zagreb, Fac Geodesy, Hvar Observ, Zagreb 10000, CroatiaAnkara Univ, Fac Sci, Dept Astron & Space Sci, TR-06100 Ankara, TurkeyUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoNatl Opt Astron Observ, Tucson, AZ 85726, USAMichigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USAUniv Washington, Dept Astron, Seattle, WA 98195, USAJanik, J, Masaryk Univ, Fac Sci, Inst Theoret Phys & Astrophys, Kotlarska 2, CS-61137 Brno, Czech Republic TI - Search for forced oscillations in binaries - IV. The eclipsing binary V436 Per revisited AB - An analysis of new spectroscopic and photoelectric UBV observations, satisfactorily covering the whole orbital period of V436 Per, together with existing data allowed us to improve the knowledge of the basic physical characteristics of the binary and its components. In several aspects, our new results differ from the findings of Paper I of this series: in particular, we found that it is the star eclipsed in the secondary minimum which is slightly more massive and larger than the optical primary. We also conclude that the apsidal advance - if present at all - is much slower than that estimated in a previous study. The orbital period might be increasing by 0.28 s per year but also this finding is very uncertain and needs verification by future observations. It is encouraging to note that two completely independent sets of programs for light-curve solutions lead to identical results. A notable finding is that both binary components rotate with very similar - if not identical - rotational periods of 1(d).45 and 1(d).40, much shorter than what would correspond to a 10(d).9 spin-orbit synchronization period at periastron. Rapid line-profile changes reported earlier could not be confirmed from new, dedicated series of high-resolution and S/N spectra MH - Canada MH - Croatia MH - Czech Republic MH - Germany MH - Mexico|Guanajuato MH - Turkey MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000185006700018 L2 - stars : binaries : close;stars : binaries : eclipsing;stars : binaries : spectroscopic;stars : fundamental parameters;stars : oscillations;stars : individual : V436 Per equivalent to 1 Per;LINE-PROFILE VARIABILITY; PHOTOMETRIC SYSTEMS; RADIAL VELOCITIES; STELLAR MASSES; STARS; PROGRAM; ATMOSPHERES; MAGNITUDES; ELEMENTS; UBV SO - Astronomy & Astrophysics 2003 ;408(2):611-619 8390 UI - 6476 AU - Jankowski CK AU - Laouz AB AU - Lesage D AU - Diaz E AD - Univ Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, CanadaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoJankowski, CK, Univ Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, Canada TI - Unusual rearrangement of dihalocyclopropanes AB - Dihalocyclopropanation of the double bond of some olefins, leading to dihalocyclopropanes, offered an opportunity to perform their rearrangement to dihalomethylvinyl with Hiyama type reagents, in presence of cationic system such as Cr2+/Cr3+. The chain elongation of alkenes via the gem-dihalocyclopropanes produced alpha,beta-unsaturated aldehydes and acids MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 3 U4 - Spectroscopy U5 - J;Article AV - English IS - 0712-4813 UR - ISI:000188061500010 L2 - DERIVATIVES SO - Spectroscopy-An International Journal 2003 ;17(4):735-745 8391 UI - 7708 AU - Janot R AU - Rougier A AU - Aymard L AU - Lenain C AU - Herrera-Urbina R AU - Nazri GA AU - Tarascon JM AD - Univ Picardie, Lab React & Chim Solides, UMR 6007, F-80039 Amiens, FranceUniv Sonora, Dept Chem Engn & Met, Hermosillo, Sonora, MexicoGen Motors, R&D, Warren, MI, USAJanot, R, Univ Picardie, Lab React & Chim Solides, UMR 6007, 33 Rue St Leu, F-80039 Amiens, France TI - Enhancement of hydrogen storage in MgNi by Pd-coating AB - MgNi alloys prepared by mechanical alloying were coated with Pd nanoparticles via a polyol process. Such a process allows the deposition of fine particles of metal catalysts on the MgNi alloy surface. This surface modification leads to a strong improvement of the H storage performances of the alloy. The hydrogen release at 150 degreesC increases from 0.6 wt.% for uncoated MgNi alloy to 1.5 wt.% for a 5 wt.% Pd-coated MgNi alloy. The strong enhancement of the desorption capacity probably results from the catalytic effect of Pd, which may act as a hydrogen pump, thus favoring hydrogen migration from the bulk to the surface of the alloy. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Sonora MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000184725000094 L2 - amorphous materials;hydrogen storage materials;mechanical alloying;grain boundaries;MG2NI SO - Journal of Alloys and Compounds 2003 ;356():438-441 8392 UI - 6410 AU - Janovick JA AU - Ulloa-Aguirre A AU - Conn PM AD - Oregon Hlth & Sci Univ, Portland, OR 97239, USAOregon Natl Primate Res Ctr, Beaverton, OR 97006, USAInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City 10101, DF, MexicoConn, PM, Oregon Hlth & Sci Univ, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA TI - Evolved regulation of gonadotropin-releasing hormone receptor cell surface expression AB - Dominant negative effects of mutant gonadotropin-releasing hormone (GnRH) receptors (GnRHR; isolated from patients with idiopathic hypogonadotropic hypogonadism) on plasma membrane expression (PME) and function of the wt GnRHR were examined. In addition, we assessed the effect of mutants on wt GnRHR with receptor modifications that, by themselves, diminished PME. Among such mechanisms that restrict PME of GnRHR in primates are: (a) addition of the primate-specific K-191 and (b) deletion of the carboxyl tail ("C-tail") found in pre-mammalian species (fish, birds) of GnRHR. We prepared rat (r) and human (h) GnRHR plasmids (88% homologous), each with or without the K-191; chimeras were then made with C-tail or each of four truncated fragments (selected to isolate consensus sites for palmitoylation or phosphorylation) of the 51-amino-acid Ser-rich piscine GnRHR C-tail and then expressed in COS-7 cells. The data suggest that the dominant negative effect of the mutants on the hGnRHR requires intrinsic low PME that co-evolved with the dominant-negative effect. The data further reveal that additional modifications must have occurred in primates that are important for both the diminution of the PME and the development of the dominant negative effect of the mutants MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0969-711X UR - ISI:000188412200015 L2 - GnRH receptor;G-protein coupled receptor;receptor targeting;membrane expression;receptor evolution;heptahelical receptor;PROTEIN-COUPLED RECEPTORS; N-LINKED GLYCOSYLATION; GNRH-RECEPTOR; HYPOGONADOTROPIC HYPOGONADISM; ENDOPLASMIC-RETICULUM; THERAPEUTIC TARGET; DISEASE ETIOLOGY; MOLECULAR-BASIS; SPLICE VARIANT; TERMINAL TAIL SO - Endocrine 2003 ;22(3):317-327 8393 UI - 7278 AU - Jantausch BA AU - Deville J AU - Adler S AU - Morfin MR AU - Lopez P AU - Edge-Padbury B AU - Naberhuis-Stehouwer S AU - Bruss JB AD - Childrens Natl Med Ctr, Washington, DC 20010, USAUniv Calif Los Angeles, Sch Med, Los Angeles, CA 90024, USAChildrens Med Ctr, Richmond, VA, USAHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoHosp Univ Valle, Cali, ColombiaPharmacia Corp, Kalamazoo, MI, USAJantausch, BA, Childrens Natl Med Ctr, Washington, DC 20010, USA TI - Linezolid for the treatment of children with bacteremia or nosocomial pneumonia caused by resistant Gram-positive bacterial pathogens AB - Background. Nosocomial infections, particularly hospital-acquired pneumonia (HAP) and bacteremia, are an increasing concern in pediatric hospitals and pediatric intensive care units. Gram-positive pathogens are a leading cause of these infections in children. Linezolid is well-tolerated and as effective as vancomycin in the treatment of these infections in adults. Objective. To evaluate the clinical effectiveness and safety of iv/oral linezolid and iv vancomycin in children with resistant Gram-positive HAP or bacteremia. Methods. Hospitalized children <12 years of age were randomized 2:1 to linezolid or vancomycin. Patients received linezolid 10 mg/kg iv every 8 h with the option to change treatment to oral linezolid suspension 10 mg/kg every 8 h or iv vancomycin 10 to 15 mg/kg every 6 to 24 h. Clinical response was evaluated at follow-up. Results from an analysis of patients with HAP or bacteremia are presented. Results. Thirty-nine patients (linezolid, 23; vancomycin, 16) with HAP and 113 patients with bacteremia (linezolid, 81; vancomycin, 32) were included in the intent-to-treat group. Clinical cure rates for clinically evaluable patients with HAP did not differ between treatment groups (linezolid, 90.0% and vancomycin, 100%; P = 0.305). No significant difference was seen in clinical cure rates in the clinically evaluable population between the linezolid and vancomycin groups for patients with catheter-related bacteremia (84.8 and 80.0%, respectively; P = 0.716) or patients with bacteremia of unknown source (79.2 and 69.2%, respectively; P = 0.501). In this subset fewer linezolid-treated patients had drug-related adverse events than did vancomycin-treated patients (19.4% vs. 28.3%; P = 0.230). Similar percentages of patients with laboratory abnormalities, including selected hematologic parameters, were seen in both treatment groups. Conclusions. Intravenous/oral linezolid was well-tolerated and as effective as vancomycin in treating children with resistant Gram-positive HAP or bacteremia MH - Colombia MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 12 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000185805300004 L2 - linezolid;bacteremia;hospital-acquired pneumonia;children;STAPHYLOCOCCUS-AUREUS; VANCOMYCIN RESISTANCE; UNITED-STATES; INFECTIONS; EPIDEMIOLOGY SO - Pediatric Infectious Disease Journal 2003 ;22(9):S164-S171 8394 UI - 7964 AU - Jaquet N AU - Gendron D AU - Coakes A AD - Texas A&M Univ, Galveston, TX 77551, USAInst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, BCS, MexicoDalhousie Univ, Dept Biol, Halifax, NS B3H 4J1, CanadaJaquet, N, Texas A&M Univ, 5007 Ave U, Galveston, TX 77551, USA TI - Sperm whales in the Gulf of California: Residency, movements, behavior, and the possible influence of variation in food supply AB - Sperm whale movements, residency, population structure, and behavior were investigated in the Gulf of California in 1998 and 1999. Variations in sperm whale movement patterns and behavior were related to changes in prey abundance (jumbo squid, Dosidicus gigas) determined by fishery statistics. Photo-identification data revealed that seven female sperm whales moved into the Gulf of California from the Galapagos Islands, traveling up to 3,803 km. These are among the longest documented movements for female sperm whales. There were significant differences in speed and distance traveled during a dive cycle between 1998 and 1999 (low and high squid abundance). In 1999 there were also significant differences in small-scale movements and behavior between the northern and the southern part of the study area (high and low prey abundance). These results suggest that when food resources are low, sperm whales travel in straighter lines, dive for longer periods, travel larger distances during dive cycles, and at higher speed. In 1999 there were significant differences in time spent socializing in areas of high prey abundance versus areas of low abundance. All of these changes in behavior were consistent with increased foraging effort when squid abundance was low. A high proportion of mature males and first-year calves were observed in the Gulf of California, suggesting that it is an important sperm whale breeding ground MH - Canada MH - Mexico|Baja California Sur MH - USA PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000183992800007 L2 - sperm whales;Physeter macrocephalus;movements;jumbo squid;Dosidicus gigas;Gulf of California;VISUALLY OBSERVABLE BEHAVIOR; SQUID DOSIDICUS-GIGAS; GALAPAGOS-ISLANDS; PHYSETER-MACROCEPHALUS; POPULATION-STRUCTURE; FEEDING SUCCESS; DIVING BEHAVIOR; MEXICO; PHOTOIDENTIFICATION; PATTERNS SO - Marine Mammal Science 2003 ;19(3):545-562 8395 UI - 6963 AU - Jara LJ AU - Alcala M AU - Vera-Lastra OL AU - Walker SE AD - Hosp La Raza, IMSS, Mexico City, DF, MexicoVA Med Ctr, Columbia, MO, USAUniv Missouri, Columbia, MO 65211, USA TI - Hyperprolactinemia secondary to microadenoma and systemic lupus erythematosus: An analysis of 36 cases MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801555 SO - Arthritis and Rheumatism 2003 ;48(9):S586-S586 8396 UI - 8137 AU - Jara LJ AU - Medina G AU - Vera-Lastra O AU - Shoenfeld Y AD - Chaim Sheba Med Ctr, Dept Med B, Tel Hashomer, IsraelChaim Sheba Med Ctr, Ctr Autoimmune Dis, Tel Hashomer, IsraelHosp Especialidades Ctr Med La Raza, Ctr Med La Raza, Clin Res Unit, Mexico City, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med La Raza, Dept Rheumatol, Mexico City, DF, MexicoHosp Gen 76, Dept Internal Med, Mexico City, DF, MexicoIMSS, Hosp Especialidades, Ctr Med La Raza, Dept Internal Med, Mexico City, DF, MexicoShoenfeld, Y, Chaim Sheba Med Ctr, Dept Med B, Tel Hashomer, Israel TI - Atherosclerosis and antiphospholipid syndrome AB - Atherosclerosis is an autoimmune/inflammatory disease associated with infectious, inflammatory, and autoimmune factors. Both humoral and cellular immune mechanisms have been proposed to participate in the onset and/or progression of atheromatous lesions. Heat-shock protein (hsp), oxidized low-density lipoprotein (LDL), and beta2-GPI have been reported to elicit humoral and cellular immune response in both experimental animals and humans. These autoantigens are expressed within atherosclerotic lesions. Immunization with the given autoantigens elicits an immune response that influences lesion progression. Atherosclerosis susceptibility can be transferred by autoantigen-sensitized lymphocytes from immunized animals. Patients with systemic lupus erythematosus (SLE) and antiphospholipid syndrome (APS) have a high risk for atherosclerotic cardiovascular events. The traditional risk factors fail to fully account for accelerated atherosclerosis in SLE and APS. Immunological alterations, such as antibodies to oxidized LDL, antiphospholipid antibodies (aPL), antibodies to beta-2 Glycoprotein (anti-beta2-GPL), anti-prothrombin antibodies, may play a role in premature atherosclerosis in SLE and APS. Paraoxonase (PON1) is an enzyme with antioxidant activity attached to the circulating high-density lipoprotein (HDL) in plasma. Its function is to prevent oxidation of LDL, thereby accounting for the antioxidant properties and the atherosclerotic protective effects of HDL. The relationship between PON1 and aPL has been recently suggested. IgG anti-HDL and IgG anti-beta2-GPI antibodies were associated with reduced PON1 activity in patients with SLE and primary APS. The determination of classic and new factors, together with specific autoantibody titers and the use of Doppler carotid ultrasound, are useful methods to detect early atherosclerosis in SLE and PAPS. Therapeutic strategies, including early control of disease and other risk factors, are essential to reduce morbidity and mortality MH - Israel MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 21 U4 - Allergy;Immunology U5 - J;Review AV - English IS - 1080-0549 UR - ISI:000183783900009 L2 - atherosclerosis;autoimmunity;inflammation;antiphospholipid antibodies;heat shock proteins;oxLDL;beta 2-GPI;LOW-DENSITY-LIPOPROTEIN; SYSTEMIC-LUPUS-ERYTHEMATOSUS; RECEPTOR-DEFICIENT MICE; CARDIOVASCULAR RISK-FACTORS; INTIMA-MEDIA THICKNESS; ANTICARDIOLIPIN ANTIBODIES; REDUCES ATHEROGENESIS; ACCELERATED ATHEROMA; APOLIPOPROTEIN-H; KNOCKOUT MICE SO - Clinical Reviews in Allergy & Immunology 2003 ;25(1):79-87 8397 UI - 8790 AU - Jara M AU - Nunez C AU - Campoy S AU - de Henestrosa ARF AU - Lovley DR AU - Barbe J AD - Univ Autonoma Barcelona, Dept Genet & Microbiol, E-08193 Barcelona, SpainUniv Autonoma Barcelona, Inst Recerca & Tecnol Agroalimentaria, Ctr Recerca Sanitat Anim, E-08193 Barcelona, SpainUniv Massachusetts, Dept Microbiol, Amherst, MA 01003, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62251, Morelos, MexicoBarbe, J, Univ Autonoma Barcelona, Dept Genet & Microbiol, E-08193 Barcelona, Spain TI - Geobacter sulfurreducens has two autoregulated lexA genes whose products do not bind the recA promoter: Differing responses of lexA and recA to DNA damage AB - The Escherichia coli LexA protein was used as a query sequence in TBLASTN searches to identify the lex,4 gene of the delta-proteobacterium Geobacter sulfurreducens from its genome sequence. The results of the search indicated that G. sulfurreducens has two independent lexA genes designated lexA1 and lexA2. A copy of a dinB gene homologue, which in E. coli encodes DNA polymerase IV, is present downstream of each lex4 gene. Reverse transcription-PCR analyses demonstrated that, in both cases, lexA and dinB constitute a single transcriptional unit. Electrophoretic mobility shift assays with purified LexA1 and LexA2 proteins have shown that both proteins bind the imperfect palindrome GGTTN(2)CN(4)GN(3)ACC found in the promoter region of both lexA1 and lexA2. This sequence is also present upstream of the Geobacter metallireducens lexA gene, indicating that it is the LexA box of this bacterial genus. This palindrome is not found upstream of either the G. sulfurreducens or the G. metallireducens recA genes. Furthermore, DNA damage induces expression of the lexA-dinB transcriptional unit but not that of the recA gene. However, the basal level of recA gene expression is dramatically higher than that of the lexA gene. Likewise, the promoters of the G. sulfurreducens recN, ruvAB, ssb, umuDC, uvrA, and uvrB genes do not contain the LexA box and are not likely to bind to the LexA1 or LexA2 proteins. G. sulfurreducens is the first bacterial species harboring a LexA gene for which a constitutive expression of its recA gene has been described MH - Mexico|Morelos MH - Spain MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000182068300012 L2 - ESCHERICHIA-COLI; HYDROXYL RADICALS; STRAND SCISSION; OXYGEN RADICALS; SUPEROXIDE; IRON; MUTAGENESIS; PROTEOBACTERIA; INVOLVEMENT; EXPRESSION SO - Journal of Bacteriology 2003 ;185(8):2493-2502 8398 UI - 6863 AU - Jaramillo VJ AU - Kauffman JB AU - Renteria-Rodriguez L AU - Cummings DL AU - Ellingson LJ AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58090, Michoacan, MexicoOregon State Univ, Dept Fisheries & Wildlife, Corvallis, OR 97330, USAJaramillo, VJ, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, AP 27-3 Xangari, Morelia 58090, Michoacan, Mexico TI - Biomass, carbon, and nitrogen pools in Mexican tropical dry forest landscapes AB - Tropical dry forest is the most widely distributed land-cover type in the tropics. As the rate of land - use/land-cover change from forest to pasture or agriculture accelerates worldwide, it is becoming increasingly important to quantify the ecosystem biomass and carbon (C) and nitrogen (N) pools of both intact forests and converted sites. In the central coastal region of Mexico, we sampled total aboveground biomass (TAGB), and the N and C pools of two floodplain forests, three upland dry forests, and four pastures converted from dry forest. We also sampled belowground biomass and soil C and N pools in two sites of each land-cover type. The TAGB of floodplain forests was as high as 416 Mg ha(-1), whereas the TAGB of the dry forest ranged from 94 to 126 Mg ha(-1). The TAGB of pastures derived from dry forest ranged from 20 to 34 Mg ha-1. Dead wood (standing and downed combined) comprised 27%-29% of the TABG of dry forest but only about 10% in floodplain forest. Root biomass averaged 32.0 Mg ha(-1) in floodplain forest, 17.1 Mg ha-1 in dry forest, and 5.8 Mg ha(-1) in pasture. Although total root biomass was similar between sites within land-cover types, root distribution varied by depth and by size class. The highest proportion of root biomass occurred in the top 20 cm of soil in all sites. Total aboveground and root C pools, respectively, were 12 and 2.2 Mg ha(-1) in pasture and reached 180 and 12.9 Mg ha(-1) in floodplain forest. Total aboveground and root pools, respectively, were 149 and 47 kg ha-1 in pasture and reached 2623 and 264 kg ha(-1) in floodplain forest. Soil organic C pools were greater in pastures than in dry forest, but soil N pools were similar when calculated for the same soil depths. Total ecosystem C pools were 306. The Mg ha(-1) in floodplain forest, 141 Mg ha(-1) in dry forest, and 124 Mg ha(-1) in pasture. Soil C comprised 37%-90% of the total ecosystem C, whereas soil N comprised 85%-98% of the total. The N pools lack of a consistent decrease in soil pools caused by land-use change suggests that C and N losses result from the burning of aboveground biomass. We estimate that in Mexico, dry forest landscapes store approximately 2.3 Pg C, which is about equal to the C stored by the evergreen forests of that country (approximately 2.4 Pg C). Potential C emissions to the atmosphere from the burning of biomass in the dry tropical landscapes of Mexico may amount to 708 Tg C, as compared with 569 Tg C from evergreen forests MH - Mexico|Michoacan MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Ecology U5 - J;Article AV - English IS - 1432-9840 UR - ISI:000186779400001 L2 - tropical dry forest;tropical floodplain forest;tropical pastures;biomass;soil carbon;soil nitrogen;carbon pools;nitrogen pools;land-use change;deforestation;TIERRA-FIRME FOREST; SOIL ORGANIC-CARBON; LAND-USE; ABOVEGROUND BIOMASS; DECIDUOUS FOREST; BRAZILIAN AMAZON; NUTRIENT POOLS; INTERSECT METHOD; ROOT BIOMASS; RAIN-FOREST SO - Ecosystems 2003 ;6(7):609-629 8399 UI - 7761 AU - Jaramillo VJ AU - hedo-Hernandez R AU - Kauffman JB AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoOregon State Univ, Dept Fisheries & Wildlife, Corvallis, OR, USAJaramillo, VJ, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Campus Morelia,AP 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Root biomass and carbon in a tropical evergreen forest of Mexico: changes with secondary succession and forest conversion to pasture AB - Conversion of tropical evergreen forests to crops or pastures results in significant depletions of terrestrial carbon (C) pools. Root biomass and root C pools were quantified in tropical evergreen primary forest, and in secondary forests and pastures of different ages, in the Los Tuxtlas Region, Veracruz, Mexico. Total root biomass to 1-m depth ranged from 19 to 27 Mg ha(-1) in primary forest, from 5.5 to 22.5 Mg ha(-1) in secondary forests (8-, 20- and 30-y-old), and from 3.1 to 5.4 Mg ha(-1) in pastures (12-, 20- and 28-y-old). Large roots (> 20 mm in diameter) were largely absent below 40 cm depth in secondary forests and pastures. Roots in the 0-40 cm soil depth represented 60-76% of the total root biomass in primary forest, 77-93% in secondary forests, and 89-96% in pastures. Root biomass comprised 4.7-6.2% of the total biomass in primary forests and between 6.8-8.5% in secondary forests. These low values, the relatively hi.-h concentration of roots in the top 40 cm of soil, and the shallow depth at which large roots occurred in secondary forests suggest forest susceptibility to natural disturbances. Root C pools ranged from 7.9 to 11.6 Mg ha(-1) in primary forests. from 2.1 to 9.6 Mg ha(-1) in secondary forests and from 1.0 to 1.9 Mg ha(-1) in pastures. The estimated total ecosystem C pool in primary forest was 415 Mg ha(-1), it ranged from 187-246 Mg ha(-1) in secondary forests, and was 179 Mg ha(-1) in pastures. Tropical forest conversion to pasture decreased the root C pool by nearly 80% and represented a 94% loss of C in ecosystem biomass. Absolute losses of root C were nevertheless small when compared with the above-L,round C loss. Carbon distribution among ecosystem biomass components is key to adequately understanding the consequences of land-use/cover change on C dynamics in tropical regions MH - Mexico|Michoacan MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000184650700010 L2 - land use change;Los Tuxtlas;Mexico;pasture;root biomass;root carbon;secondary forest;tropical forest;RAIN-FOREST; LAND-USE; LOS-TUXTLAS; ECOSYSTEM; DEFORESTATION; LANDSCAPE; REGION; CYCLE; FIRE SO - Journal of Tropical Ecology 2003 ;19():457-464 8400 UI - 7317 AU - Jardim JR AU - Rico G AU - de la Roza C AU - Obispo E AU - Urueta J AU - Wolff M AU - Miravitlles M AD - Univ Fed Sao Paulo, Sao Paulo, BrazilCtr Med Nacl La Raza, Mexico City, DF, MexicoHosp Clin Barcelona, IDIBAPS, Inst Clin Pneumol & Cirurg Torac, Barcelona, SpainHosp Gen Tijuana, Tijuana, MexicoINER, Mexico City, DF, MexicoFdn Arriaran, Santiago, ChileMiravitlles, M, Hosp Clin Barcelona, Serv Neumol, UVIR, Escalera 2,Planta 3,Villarroel 170, Barcelona 08036, Spain TI - A comparison of moxifloxacin and amoxicillin in the treatment of community-acquired pneumonia in Latin America: results of a multicenter clinical trial AB - Since community-acquired pneumonia (CAP) is a common disease with a high morbidity rate, it is important to obtain information concerning its etiology and susceptibility to antibiotics across different geographic areas. This study presents data obtained in 5 Latin American counties in the course of an international clinical trial that evaluated the efficacy and safety of treatment with either moxifloxacin or amoxicillin administered for 10 days to patients suspected of having CAP caused by a pneumococcal infection. Details are given of the pathogens identified, the patterns of sensitivity to antibiotics observed, and the clinical and microbiological results obtained. A total of 84 patients were studied, of whom 70 (83.3%) were evaluated at the end of the trial to determine the efficacy and safety of the treatment received. Gram-positive bacteria were found in samples from 29 patients (80.5%). The pathogen was Streptococcus pneumoniae in 28 of those cases (77.7%). Gram-negative bacteria were found in 7 patients (19.4%), the most common being Haemophilus influenzae in 3 patients (8.3%). The presence of atypical microorganisms was detected in 18 of the 70 patients (25%), mainly Mycobacterium pneumoniae (n = 11), and in 6 cases (8.5%) the infection was mixed. Ten strains of S. pneumoniae (35.7%) were shown to be susceptible to penicillin, 2 (7.1%) were highly resistant, and 16 (57.1%) showed moderate resistance. The clinical success rate at the final visit after treatment was 94.1% for moxifloxacin and 91.7% for amoxicillin. The results of this trial demonstrate a high prevalence of S. pneamoniae with reduced susceptibility to penicillin in patients with CAP in Latin America. It also revealed a high incidence of atypical pathogens and mixed infection in 8.6% of patients. This information should be taken into account when establishing protocols for empirical treatment of CAP in Latin America MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Baja California MH - Spain PB - BARCELONA: EDICIONES DOYMA S/L RP - NOT IN FILE U3 - TC 8 U4 - Respiratory System U5 - J;Article AV - Spanish IS - 0300-2896 UR - ISI:000185812300003 L2 - pneumonia;treatment;antibiotics;resistance;Pneumococcus;STREPTOCOCCUS-PNEUMONIAE; ANTIMICROBIAL RESISTANCE; RESPIRATORY-TRACT; RISK-FACTORS; PNEUMOCOCCAL PNEUMONIA; PENICILLIN-RESISTANT; CONSECUTIVE PATIENTS; PROGNOSTIC FACTORS; MEDICAL OUTCOMES; ETIOLOGY SO - Archivos de Bronconeumologia 2003 ;39(9):387-393 8401 UI - 8719 AU - Jauregui-Zuniga D AU - Reyes-Grajeda JP AU - Sepulveda-Sanchez JD AU - Whitaker JR AU - Moreno A AD - Univ Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoWhitaker, JR, Univ Calif Davis, Dept Food Sci & Technol, Davis, CA 95616 USA TI - Crystallochemical characterization of calcium oxalate crystals isolated from seed coats of Phaseolus vulgaris and leaves of Vitis vinifera AB - Calcium oxalate crystals are a major biomineralization product in higher plants, Their biological function and use are not well understood. In this work, we focus on the isolation and crystallochemical characterization of calcium oxalate crystals from seed coats of Phaseolus vulgaris (prisms) and leaves of Vitis vinifera (raphides and druses) using ultrastructural methods. A proposal based on crystal growth theory was used for explaining the existence of different morphologies shown by these crystals grown inside specialized cells in plants MH - USA MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000182084900003 L2 - biocrystallization;biomineralization;crystal morphology;natural crystal growth;X-ray diffraction;PROTEINS; RAPHIDES SO - Journal of Plant Physiology 2003 ;160(3):239-245 8402 UI - 9272 AU - Javelle A AU - Morel M AU - Rodriguez-Pastrana BR AU - Botton B AU - Andre B AU - Marini AM AU - Brun A AU - Chalot M AD - Univ Nancy 1, Fac Sci & Tech, UMR INRA UHP Interact Arbres Microorganismes 1136, F-54506 Vandoeuvre Les Nancy, FranceUniv Autonoma Tlaxcala, Ctr Rech Sci Biol, Biotechnol Lab, Mexico City, DF, MexicoFree Univ Brussels, Inst Biol & Med Mol, Lab Physiol Cellulaire, Gosselies, BelgiumChalot, M, Univ Nancy 1, Fac Sci & Tech, UMR INRA UHP Interact Arbres Microorganismes 1136, BP 239, F-54506 Vandoeuvre Les Nancy, France TI - Molecular characterization, function and regulation of ammonium transporters (Amt) and ammonium-metabolizing enzymes (GS, NADP-GDH) in the ectomycorrhizal fungus Hebeloma cylindrosporum AB - External hyphae, which play a key role in nitrogen nutrition of trees, are considered as the absorbing structures of the ectomycorrhizal symbiosis. Here, we have cloned and characterized Hebeloma cylindrosporum AMT1, GLNA and GDHA genes, which encode a third ammonium transporter, a glutamine synthetase and an NADP-dependent glutamate dehydrogenase respectively. Amt1 can fully restore the pseudohyphal growth defect of a Saccharomyces cerevisiae mep2 mutant, and this is the first evidence that a heterologous member of the Mep/Amt family complements this dimorphic change defect. Dixon plots of the inhibition of methylamine uptake by ammonium indicate that Amt1 has a much higher affinity than the two previously characterized members (Amt2 and Amt3) of the Amt/Mep family in H. cylindrosporum. We also identified the intracellular nitrogen pool(s) responsible for the modulation of expression of AMT1, AMT2, AMT3, GDHA and GLNA. In response to exogenously supplied ammonium or glutamine, AMT1, AMT2 and GDHA were downregulated and, therefore, these genes are subjected to nitrogen repression in H. cylindrosporum. Exogenously supplied nitrate failed to induce a downregulation of the five mRNAs after transfer of mycelia from a N-starved condition. Our results demonstrate that glutamine is the main effector for AMT1 and AMT2 repression, whereas GDHA repression is controlled by intracellular ammonium, independently of the intracellular glutamine or glutamate concentration. Ammonium transport activity may be controlled by intracellular NH4+. AMT3 and GLNA are highly expressed but not highly regulated. A model for ammonium assimilation in H. cylindrosporum is presented MH - Belgium MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 32 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000180692100011 L2 - DEPENDENT GLUTAMATE-DEHYDROGENASE; NITROGEN CATABOLITE REPRESSION; MUSHROOM AGARICUS-BISPORUS; SACCHAROMYCES-CEREVISIAE; ASPERGILLUS-NIDULANS; PAXILLUS-INVOLUTUS; FILAMENTOUS FUNGI; ESCHERICHIA-COLI; LACTOSE PERMEASE; CONSERVED MOTIF SO - Molecular Microbiology 2003 ;47(2):411-430 8403 UI - 8297 AU - Jeffres TD AU - Loya P AD - Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoSUNY Binghamton, Dept Math Sci, Binghamton, NY 13902, USAJeffres, TD, Univ Michoacana, Inst Fis & Matemat, Edificio C3, Morelia 58040, Michoacan, Mexico TI - Regularity of solutions of the heat equation on a cone MH - Mexico|Michoacan MH - USA PB - CAYAHOGA FALLS: HINDAWI PUBLISHING CORPORATION RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1073-7928 UR - ISI:000183274000002 L2 - MANIFOLDS; KERNEL SO - International Mathematics Research Notices 2003 ;(3):161-178 8404 UI - 7322 AU - Jennette D AU - Wawrzyniec T AU - Fouad K AU - Dunlap DB AU - Meneses-Rocha J AU - Grimaldo F AU - Munoz R AU - Barrera D AU - Williams-Rojas CT AU - Escamilla-Herrera A AD - Univ Texas, Jackson Sch Geosci, Bur Econ Geol, Austin, TX 78712, USADept Earth & Planetary Sci, Albuquerque, NM 87131, USAPemex Explorac & Prod, Subdirecc Tecn Explorac, Villahermosa, MexicoPemex Explorac & Prod, Veracruz City, Veracruz, MexicoPemex Explorac & Prod, Activo Salina Istmo, Coatzacoalcos 96400, Veracruz, MexicoJennette, D, Univ Texas, Jackson Sch Geosci, Bur Econ Geol, Austin, TX 78712 USA TI - Traps and turbidite reservoir characteristics from a complex and evolving tectonic setting, Veracruz Basin, southeastern Mexico AB - The Miocene and Pliocene interval of the Veracruz Basin, southeast Mexico, experienced an evolving array of shortening, strike-slip, and volcanic forces in response to plate-scale interactions. The basin is divided into six structural domains that define regions of comparable timing and type of structural deformation, and the basin fill is separated into two long-term depositional phases, each of which can be tied to a waning and then waxing of major basin-bounding tectonic events. The first phase of deposition took place from the early to late Miocene and is tied to the waning effects of the Laramide orogeny. The Miocene basin inherited a tectonically steepened basin margin, across which deep canyons were carved and variably filled with mudstone and thin remnants of coarse sandstone and conglomerate. This zone of erosion and bypass grades into thick sandstone-rich basin-floor fans. Later in phase I subaqueous volcanoes tied to distant plate subduction developed offshore and formed a bathymetric barrier that prevented turbidity currents from entering the ancestral Gulf of Mexico. The volcanoes also served as immovable buttresses, around which intrabasinal thrust belts developed in response to regional shortening. The second depositional phase is tied to the onset of internal basin shortening and uplift of the north basin margin known as the trans-Mexican volcanic belt. This uplift caused a dramatic reconfiguration of the sediment-dispersal system, whereby large shelf clinoforms prograded from north to south across the basin. In contrast to the onlapping stacking pattern of phase I units, phase II units stack in a strongly offlapping pattern. Proven and postulated reservoir-trap combinations, ranging from four-way to three-way combination (stratigraphic), to pure stratigraphic traps are common. Four-way closures mapped from the two-dimensional and three-dimensional seismic data are large (P50: 5000 km(2)) and are covered with thick, lower Miocene fan sandstones. Traps that depend on a stratigraphic component are thinner and smaller in size (P50: 1000 km(2)), but more numerous than the four-way closures. Because many structures have experienced prolonged pulses of compression, top seal is considered an important geologic risk to the retention of substantial gas-column heights MH - USA MH - Mexico|Veracruz MH - Mexico|Tabasco PB - TULSA: AMER ASSOC PETROLEUM GEOLOGIST RP - NOT IN FILE U3 - TC 6 U4 - Energy & Fuels;Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0149-1423 UR - ISI:000185777000003 L2 - GULF-OF-MEXICO; CONTINENTAL-MARGIN; EVOLUTION; CALIBRATION; ORIGIN; MODELS SO - Aapg Bulletin 2003 ;87(10):1599-1622 8405 UI - 6668 AU - Jennette DC AU - Fouad K AU - Wawrzyniec T AU - Dunlap D AU - Munoz R AU - Meneses-Rocha J AD - Univ Texas, Bur Econ Geol, John A & Katherine G Jackson Sch Geosci, Austin, TX 78713, USAPEMEX Explorac & Prod, Villahermosa, MexicoJennette, DC, Univ Texas, Bur Econ Geol, John A & Katherine G Jackson Sch Geosci, Austin, TX 78713 USA TI - Slope and basin-floor reservoirs from the Miocene and Pliocene of the Veracruz Basin, southeastern Mexico AB - A regional study of the Veracruz Basin provided an excellent view of long-term deepwater sedimentation patterns from an evolving foreland-type basin. The regional seismic and well-log data set allows for an accurate reconstruction of slope and basin-floor depositional patterns, lithologic compositions, and paleogradients from a continuous succession of bathyal strata that span the Miocene to the lower Pliocene. Variations in Miocene and Pliocene deepwater reservoirs can be linked to prevailing slope characteristics. The Miocene basin had a high-gradient, tectonically generated slope, and the Pliocene basin had a low-gradient constructional slope. The Miocene basin owes its steep margin to the tectonic stacking of early Tertiary, Laramide-age thrust sheets. The Miocene margin shed a mixture of coarse elastic sediments (sands, gravels, and cobbles) and fines (silts and clays) that were transported into the deep basin via turbidity currents and debris flows. Channelized deposits dominate the Miocene slope, and reservoirs occur in long-lasting basement-confined canyons and shorter-lived shallower erosional gulleys. Thick and areally-extensive basin-floor fans exist outboard of the strongly channelized Miocene slope. Fan distribution is strongly controlled by synsedimentary contractional anticlines and synclines. In contrast, the latest Miocene to early Pliocene basin development was dominated by a strongly prograding wedge of shelf and slope deposits that was induced by volcanogenic uplift and increased sediment supply. During this phase, turbidite reservoirs are limited to narrow and sinuous deepwater channels that reside at the toe of the constructional clinoforms and areally limited, thinner basinal fans. (C) 2003 Elsevier Ltd. All fights reserved MH - Mexico|Tabasco MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0264-8172 UR - ISI:000187355000006 L2 - turbidites;Gulf of Mexico;Veracruz Basin;GULF-OF-MEXICO; CALIBRATION; COMPLEX SO - Marine and Petroleum Geology 2003 ;20(6-8):587-600 8406 UI - 7411 AU - Jensen TR AU - Kjaer K AU - Brezesinski G AU - Ruiz-Garcia J AU - Mohwald H AU - Makarova NN AU - Godovsky YK AD - Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Chem, DK-8000 Aarhus C, DenmarkRiso Natl Lab, Dept Mat Res, DK-4000 Roskilde, DenmarkMax Planck Inst Collids & Interfaces, D-14476 Potsdam, GermanyUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoRussian Acad Sci, Nesmeyanov Inst Elementoorgan Compounds, Moscow 117813, RussiaKarpov Inst Phys Chem, Moscow 105064, RussiaJensen, TR, Aarhus Univ, Interdisciplinary Nanosci Ctr, Dept Chem, DK-8000 Aarhus C, Denmark TI - Successive multilayer formation of cyclolinear polyorganosiloxanes floating at the air-water interface. A synchrotron X-ray reflectivity investigation AB - Siloxane polymers self-organized into nanostructures with controllable distinct thicknesses from 1 to at least 6 molecular layers, i.e., 1-6 nm, are investigated. Macroscopic manipulation of the surface pressure for these ultrathin films leads to an architecture with a distinct layer thickness and a highly ordered structure as demonstrated by synchrotron X-ray reflectivity measurements performed in situ at the air/water interface. An atactic polymer of cyclolinear methylphenylsiloxane (CL-PMPhSi) that consists of monomer rings formed by six silicon atoms joined by oxygen is investigated in this study. Surface pressure (pi) vs surface area (A) isotherm data for these polymers show up to seven plateaus, and this had been assumed to indicate the formation of multilayers with distinct layer thicknesses consisting of 1, 2, 3, etc. layers. The aim of this work was to prove that such successive multilayers are indeed formed and to study their structure. The high-resolution X-ray reflectivity data (0.01 < q(z) < 0.85 Angstrom(-1)) measured with a liquid surface diffractometer allow a detailed structural analysis using both a model-independent method and slabs as a layer model. The extracted electron density profiles in the direction of the surface normal are in good correspondence with calculated profiles based on the crystallographic structural analysis of the bulk crystalline monomer. The layered structure of the thin film is clearly visible in the electron density profiles MH - Denmark MH - Germany MH - Mexico|San Luis Potosi MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000185443600040 L2 - PHASE-TRANSITIONS; LANGMUIR MONOLAYERS; AIR/WATER INTERFACE; SURFACE MONOLAYERS; STEPWISE COLLAPSE; FORCE MICROSCOPY; BREWSTER-ANGLE; FILMS; NEUTRON; ORGANIZATION SO - Macromolecules 2003 ;36(19):7236-7243 8407 UI - 9424 AU - Jergel M AU - Andrade E AU - Chromik S AU - Jergel M AU - Falcony C AU - Strbik V AU - Rocha MF AU - Zavala EP AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaInst Politecn Nacl, Excuela Super Ingn Mecan & Elect, Mexico City 07738, DF, MexicoJergel, M, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Composition depth profiles of superconducting MgB2 thin films determined by ion beam analysis methods AB - Thin superconducting MgB2 films were grown on randomly oriented sapphire, glassy carbon and silicon (111) substrates by sequential e-beam evaporation of boron and magnesium followed by an in situ annealing at 630 or 700 degreesC. The best zero resistance T-co values were 26 K for MgB2/Si film annealed at 630 degreesC and, similarly, 26 K for MgB2/Al2O3 film annealed at 700 degreesC. The structure and phase composition of synthesized films were investigated by X-ray diffraction and the surface morphology by SEM. An ion beam analysis (IBA) technique using a 2550 keV He-3(+) beam has been used to obtain the MgB2 elemental composition depth profiles and film thicknesses. To examine the elemental composition, a combination of analyses of the He-3(+) backscattered and nuclear reaction regions of the same particle energy spectrum has been performed. The IBA results show that Mg and B concentration profiles are rather inhomogeneous inside the films. An important result is also the detection of small concentrations of O and C in all the MgB2 films. The oxidation of the films could be in the form of MgO and/or B2O3 and the presence of C is probably due to the ambient contamination. The IBA shows that Mg and B diffuses rather deeply, into the glassy carbon and sapphire substrates. In the case of Si(111) substrate, the Mg2Si phase is created on the film/substrate interface consuming Mg from the film surface. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000180307200001 L2 - thin MgB2 films;elemental composition;RBS;nuclear reaction method SO - Physica C-Superconductivity and Its Applications 2003 ;383(4):287-294 8408 UI - 8240 AU - Jesgarz S AU - Lerma S AU - Hess PO AU - Civitarese O AU - Reboiro M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaJesgarz, S, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Schematic model for QCD. II. Finite temperature regime AB - A schematic model for QCD, developed in a previous paper, is applied to calculate meson properties in the high temperature (up to 0.5 GeV) regime. It is a Lipkin model for quark-antiquark pairs coupled to gluon pairs of spin zero. The partition function is constructed with the obtained meson spectrum and several thermodynamical observables are calculated, such as the energy density, heat capacity, as well as relative production rates of mesons and absolute production rates for pions and kaons. The model predictions show a qualitative agreement with data. Based on these results, we advocate the use of the model as a toy model for QCD MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000183382500062 L2 - RELATIVISTIC QUARK-MODEL; STRANGE-BARYON SPECTRUM; DOUBLE-BETA DECAY; SOLVABLE MODEL; FORCES; EQUILIBRATION; COLLISIONS SO - Physical Review C 2003 ;67(5): 8409 UI - 8916 AU - Jiang KY AU - Eitan A AU - Schadler LS AU - Ajayan PM AU - Siegel RW AU - Grobert N AU - Mayne M AU - Reyes-Reyes M AU - Terrones H AU - Terrones M AD - Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USARensselaer Polytech Inst, Rensselaer Nanotechnol Ctr, Troy, NY 12180, USAMax Planck Inst Met Res, D-70569 Stuttgart, GermanyCEA Saclay, SPAM, DRECAM, F-91191 Gif Sur Yvette, FranceIPIC&T, Adv Mat Dept, San Luis Potosi 78210, SLP, MexicoJiang, KY, Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA TI - Selective attachment of gold nanoparticies to nitrogen-doped carbon nanotubes AB - Gold nanoparticles were selectively attached to chemically functionalized surface sites on nitrogen-doped carbon (CNx) nanotubes. A cationic polyelectrolyte was adsorbed on the surface of the nanotubes by electrostatic interaction between carboxyl groups on the chemically oxidized nanotube surface and polyelectrolyte chains. Negatively charged 10 nm gold nanoparticles from a gold colloid suspension were subsequently anchored to the surface of the nanotubes through the electrostatic interaction between the polyelectrolyte and the nanoparticles. This approach provides an efficient method to attach other nanostructures to carbon nanotubes and can be used as an illustrative detection of the functional groups on carbon nanotube surfaces MH - USA MH - France MH - Germany MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 139 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000181586600001 L2 - CHEMICAL MODIFICATION; DEPOSITION; PYROLYSIS; WIRES SO - Nano Letters 2003 ;3(3):275-277 8410 UI - 7660 AU - Jiang SC AU - Wang J AU - Khan MI AU - Middlemiss PJ AU - Salgado-Ceballos H AU - Werstiuk ES AU - Wickson R AU - Rathbone MP AD - McMaster Univ, Hlth Sci Ctr, Dept Med, Hamilton, ON L8N 3Z5, CanadaIIMSS, CMN, Med Res Unit Neurol Dis, Mexico City, DF, MexicoCanadian Spinal Res Org, Richmond Hill, ON L4C 9S7, CanadaRathbone, MP, McMaster Univ, Hlth Sci Ctr, Dept Med, 4N71,1200 Main St W, Hamilton, ON L8N 3Z5, Canada TI - Enteric glia promote regeneration of transected dorsal root axons into spinal cord of adult rats AB - After spinal cord injury axonal regeneration is poor, but may be enhanced by the implantation of olfactory ensheathing glia (OEG). Enteric glia (EG) share many properties of OEG. Transected dorsal root axons normally do not regenerate through the central nervous system myelin into the spinal cord. We tested whether EG, like OEG, could promote regeneration in this paradigm. Three weeks after EG implantation, numerous regenerating dorsal root axons reentered the spinal cord. Ingrowth of dorsal root axons was observed using 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate. Primary sensory afferents invaded laminae 1, 2, and 3, grew through laminae 4 and 5, and reached the dorsal gray commissure. No axonal ingrowth was observed in control animals, indicating that transplanted EG enabled regeneration of the injured dorsal root axons into the adult spinal cord. Thus, EG implantation may be beneficial in promoting axonal growth after central nervous system injury. (C) 2003 Elsevier Science (USA). All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0014-4886 UR - ISI:000182527400009 L2 - cell culture;dorsal root;enteric glia;regeneration;spinal cord;transplantation;FIBRILLARY ACIDIC PROTEIN; MYENTERIC PLEXUS; CORPUS STRIATUM; NERVOUS-SYSTEM; CELLS; TRANSPLANTATION; NEURONS; GANGLIA; INJURY SO - Experimental Neurology 2003 ;181(1):79-83 8411 UI - 7395 AU - Jiang X AU - Huang PW AU - Zhong WM AU - Morrow A AU - Ruiz-Palacios G AU - Pickering LK AD - Childrens Hosp, Med Ctr, Dept Pediat, Cincinnati, OH 45229, USACtr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USAInst Nutr, Mexico City, DF, Mexico TI - Human milk contains elements that block binding of noroviruses to histo-blood group antigens MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000181897901830 SO - Pediatric Research 2003 ;53(4):321A-321A 8412 UI - 6432 AU - Jiang Y AU - Lozada-Cassou M AU - Vinet A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Montreal, Fac Med, Inst Genie Biomed, Montreal, PQ H4J 1C5, CanadaUniv Montreal, Fac Med, Hop Sacre Coeur, Ctr Rech, Montreal, PQ H4J 1C5, CanadaJiang, Y, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Synchronization and symmetry-breaking bifurcations in constructive networks of coupled chaotic oscillators AB - The spatiotemporal dynamics of networks based on a ring of coupled oscillators with regular shortcuts beyond the nearest-neighbor couplings is studied by using master stability equations and numerical simulations. The generic criterion for dynamic synchronization has been extended to arbitrary network topologies with zero row-sum. The symmetry-breaking oscillation patterns that resulted from the Hopf bifurcation from synchronous states are analyzed by the symmetry group theory MH - Canada MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000188316700005 L2 - SMALL-WORLD NETWORKS; SYSTEMS; STABILITY; ARRAYS SO - Physical Review e 2003 ;68(6): 8413 UI - 9266 AU - Jiang Y AU - Lozada-Cassou M AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Montreal, CRM, Montreal, PQ, CanadaJiang, Y, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Emergent dynamics in a network of recurrently coupled neurons AB - Propagation and coherent spatiotemporal patterns of activity are investigated numerically for a network of model neurons with local recurrent couplings. Emergent phenomena such as bursting, rotating wave, and other self-organized spatiotemporal patterns are revealed and analyzed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000180660200007 L2 - NEURAL NETWORK; VISUAL-CORTEX; SYNCHRONIZATION; OSCILLATIONS; MODEL; CHAOS SO - Physics Letters A 2003 ;307(2-3):129-135 8414 UI - 7705 AU - Jimenez-Angeles F AU - Messina R AU - Holm C AU - Lozada-Cassou M AD - Inst Mexicano Petr, Programa Ingn Mol, Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Dusseldorf, Inst Theoret Phys 2, D-40225 Dusseldorf, GermanyMax Planck Inst Polymer Res, D-55128 Mainz, GermanyJimenez-Angeles, F, Inst Mexicano Petr, Programa Ingn Mol, Inst Mexicano Petr, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Ion pairing in model electrolytes: A study via three-particle correlation functions AB - A novel integral equations approach is applied for studying ion pairing in the restricted primitive model electrolyte, i.e., the three-point extension (TPE) to the Ornstein-Zernike integral equations. In the TPE approach, the three-particle correlation functions g([3])(r(1),r(2),r(3)) are obtained. The TPE results are compared to molecular dynamics (MD) simulations and other theories. Good agreement between TPE and MD is observed for a wide range of parameters, particularly where standard integral equations theories fail, i.e., low salt concentration and high ionic valence. Our results support the formation of ion pairs and aligned ion complexes. (C) 2003 American Institute of Physics MH - Germany MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000184775200028 L2 - RESTRICTED-PRIMITIVE MODEL; CHARGED HARD-SPHERES; SPHERICALLY INHOMOGENEOUS FLUIDS; MONTE-CARLO-SIMULATION; ELECTRIC DOUBLE-LAYER; INTEGRAL-EQUATION; CRITICAL-BEHAVIOR; HYPERNETTED-CHAIN; EQUILIBRIUM PROPERTIES; NUMERICAL-SOLUTION SO - Journal of Chemical Physics 2003 ;119(9):4842-4856 8415 UI - 7309 AU - Jimenez-Cruz A AU - Bacardi-Gascon M AU - Turnbull WH AU - Rosales-Garay P AU - Severino-Lugo I AD - Univ Autonoma Baja California, Sch Med, Nutr Program, Mexicali 21100, Baja California, MexicoLife Univ, Dept Nutr, Marietta, GA, USAJimenez-Cruz, A, 2399 Eastridge Loop, Chula Vista, CA 91915, USA TI - A flexible, low-glycemic index Mexican-style diet in overweight and obese subjects with type 2 diabetes improves metabolic parameters during a 6-week treatment period AB - OBJECTIVE - The aim of this study was to compare the effects of a flexible lower- and higher-glycemic index (GI) Mexican-style diet on biochemical data and BMI during a 6-week treatment period. RESEARCH DESIGN AND METHODS - This study was a randomized, crossover design of two 6-week periods with a 6-week washout period between treatments. Subjects with type 2 diabetes (n = 36) with a BMI >25 kg/m(2) were selected. Fourteen subjects completed the study with eligible dietary records. Dietary instruction was provided on flexible diets with both a high and low GI. Fasting venous blood samples were taken at the start and finish of each dietary period, and biochemical data were analyzed. Multi- and univariate one-factor repeated-measures ANOVA were used to compare biochemical data. RESULTS - Glycemic load and GI were lower during the low-GI diet, and dietary fiber was lower during the high-GI diet. The participants in the low-GI period consumed significantly fewer carbohydrates, such as white-wheat bread, white long-grain rice, potatoes, high-GI fruits and carrots, and more carbohydrates, such as pinto beans, whole-meal wheat bread, and low-Gi fruits than did participants in the high-GI period. There were no differences in the amount of I carbohydrates consumed, such as corn tortillas and dairy products. At the end of the study periods, Ale was improved on the low- compared with the high-GI diet (P < 0.008). CONCLUSIONS - We conclude that a low-GI diet, containing Mexican-style foods, may help to improve the metabolic control in type 2 obese diabetic subjects during a 6-week period MH - Mexico|Baja California MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 16 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000185787600003 L2 - CARBOHYDRATE EXCHANGE; LOAD; RISK; INSULIN; DISEASE; GLUCOSE; FIBER; AMERICAN; MELLITUS; CHILDREN SO - Diabetes Care 2003 ;26(7):1967-1970 8416 UI - 8333 AU - Jimenez-Cruz A AU - Bacardi-Gascon M AU - Spindler AA AD - UABC, Sch Med, Tijuana, Baja California, MexicoUABC, Master Nutr Program, Tijuana, Baja California, MexicoSan Diego State Univ, Dept Exercise & Nutrit Sci, San Diego, CA 92182, USAJimenez-Cruz, A, 2399 Eastridge Loop, Chula Vista, CA 91915, USA TI - Obesity and hunger among Mexican-Indian migrant children on the US-Mexico border AB - BACKGROUND: Although Mexican-Indian migrant workers live under precarious conditions in both Mexico and the USA, they have more access to food than they did in their original communities. The nutritional status and food security among the children of these workers have not been reported. OBJECTIVE: The purpose of this study was to assess the prevalence of overweight, obesity, undernutrition and hunger among migrant children in a city on the US-Mexico border. DESIGN: During 2001-2002, a total of 1767 children from six schools from the Tijuana Indian school system was measured to assess anthropometric status. Third and fifth grade children were also interviewed for their perception of hunger experience and dietary intake by 24-h recall method. RESULTS: The overall prevalence of overweight and obesity was 38%. Abdominal obesity was found in 26% of subjects, while 43% had both obesity and abdominal obesity. The prevalence of undernutrition according to weight-for-age was 1.2%, and by height-for-age it was 4.8%. The prevalence of hunger was 2.5%, and at risk of hunger was 44%. Daily intake of food groups in servings was: 8.7 grains, 1.2 fruit, 1.0 vegetable, 2.1 milk and 2.6 meat. Only one child (0.07%) consumed The Apple of Health recommended portions. CONCLUSIONS: This study confirmed the coexistence of obesity, hunger, undernutrition and limited food group consumption among Indian children living in a prosperous and the largest US-Mexico border city MH - Mexico|Baja California MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 6 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 0307-0565 UR - ISI:000183209700015 L2 - overweight;hunger;migrant children;CARDIOVASCULAR RISK-FACTORS; PREVENTION; COMMUNITIES; OVERWEIGHT; PREVALENCE; CHILDHOOD; ADULTS; GROWTH SO - International Journal of Obesity 2003 ;27(6):740-747 8417 UI - 6781 AU - Jimenez-Mier J AU - Ederer DL AU - Schuler T AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoTulane Univ, Dept Phys, New Orleans, LA 70118, USAJimenez-Mier, J, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Correlation effects in the resonant and nonresonant manganese 3s -> 2p photon emission in MnF2 AB - Experimental results for manganese 3s-->2p photon emission in MnF2 that occurs after resonant and non-resonant production of a 2p hole are presented. Transitions that involve a change in the spin of the 3d(5) subshell are observed and identified. Results of a free-ion calculation that includes the effect of the interaction between the configurations with a single 3s hole and two 3p holes in the final state is also given. Good overall agreement is found between the experiment and the calculation. This comparison allows a direct interpretation of the absorption spectrum, the Raman emission spectra, and the normal or nondispersive fluorescence spectrum in terms of well-defined ionic states. Spin-changing transitions in both absorption and emission are identified, and their intensities relative to the spin-conserving transitions are found to be well predicted by theory MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000187004700073 L2 - X-RAY-ABSORPTION; RAMAN-SCATTERING; L-EDGE; SPECTROSCOPY; FLUORESCENCE; STATES; CAF2; DEPENDENCE; FIELD SO - Physical Review A 2003 ;68(4): 8418 UI - 6096 AU - Jimenez-Perez A AU - Wang Q AU - Markwick N AD - Massey Univ, Inst Nat Resources, Entomol & IPM Lab, Palmerston North, New ZealandIPN, Ctr Desarrollo Prod Bioticos, Yautepec 62730, Morelos, MexicoDSIR, Mt Albert Res Ctr, Auckland, New ZealandWang, Q, Massey Univ, Inst Nat Resources, Entomol & IPM Lab, Private Bag 11222, Palmerston North, New Zealand TI - Remating behavior of Cnephasia jactatana Walker females (Lepidoptera : Tortricidae) AB - Cnephasia jactatana Walker is an important pest of kiwifruit in New Zealand. We investigated, under laboratory conditions, the effects of multiple mating on the reproductive performance of C. jactatana females and how such effects varied with male virginity and larval nutrition. We found that in permanent pairs, remating increased female fecundity and fertility but suboptimally fed females benefited more from remating. Regardless of this benefit, mass-reared pairs had a lower remating frequency. Females remating with a virgin male or a male that had delivered a spermatophore presented similar fecundity and fertility; however, females receiving a second ejaculate from a virgin male had increased daily fecundity. Female weight clearly affected remating behavior since those that received a second ejaculate were significantly heavier. Neither mating length nor size of the first spermatophore influenced female remating. Further, mass-reared and individually reared males produced spermatophores of similar size MH - Mexico|Morelos MH - New Zealand PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 0892-7553 UR - ISI:000189394400005 L2 - remating behavior;larval nutrition;fertility;fecundity;virginity;MALE MATING HISTORY; EUROPEAN CORN-BORER; CALLOSOBRUCHUS-MACULATUS; REPRODUCTIVE SUCCESS; CLAVATUS HETEROPTERA; POLYANDROUS FEMALES; OSTRINIA-NUBILALIS; MOTHS LEPIDOPTERA; MULTIPLE MATINGS; PIERIS-NAPI SO - Journal of Insect Behavior 2003 ;16(6):797-809 8419 UI - 6981 AU - Jimenez-Sanchez G AU - Laclette JP AU - Rosenkranz J AU - Serrano-Perez-Giovas A AU - Uribe M AD - Consortium Inst Genom Med, Mexico City, DF, MexicoJohns Hopkins Univ, McKusick Nathans Inst Genet Med, Baltimore, MD 21218, USAMexican Hlth Fdn, FUNSALUD, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoNatl Council Sci & Technol, CONACYT, Mexico City, DF, MexicoMinist Hlth, SSA, Mexico City, DF, Mexico TI - Strategy for a systematic genomic analysis of the Mexican population MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701321 SO - American Journal of Human Genetics 2003 ;73(5):396-396 8420 UI - 8812 AU - Jimenez-Sanchez G AD - Consortium Inst Genom Med Mexico, Mexico City 14210, DF, MexicoJohns Hopkins Univ, McKusick Nathans Inst Genet Med, Baltimore, MD 21205, USAJimenez-Sanchez, G, Consortium Inst Genom Med Mexico, Camino Ajusco 130-101,Col Jardines Montana, Mexico City 14210, DF, Mexico TI - Developing a platform for genomic medicine in Mexico AB - Mexico is preparing to develop a genomic medicine program focused on national health problems. Modern Mexicans result from an admixture of more than 65 native Indian groups with Spaniards, leading to a unique genetic makeup and a characteristic set of disease susceptibilities. Since 1999, more than 100 experts from different fields have joined efforts with government, academia, and industry to identify priorities and goals for genomic medicine in Mexico. The plan includes establishment of an Institute of Genomic Medicine with strong intramural and extramural programs. This project is expected to ease the social and financial burden of health problems in Mexico MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000182135400046 L2 - GENETIC-STRUCTURE SO - Science 2003 ;300(5617):295-296 8421 UI - 7480 AU - Jimenez-Sandoval S AU - Lopez-Rivera A AU - Irwin JC AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76001, MexicoUniv Los Andes, Fac Ciencias, Lab Fis Aplicada, Merida 5101, VenezuelaSimon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, CanadaJimenez-Sandoval, S, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Apartado Postal 1-798, Queretaro 76001, Mexico TI - Influence of reduced mass differences on the Raman spectra of ternary mixed compounds: Zn1-xFexS and Zn1-xMnxS AB - A Raman scattering study of the mixed crystals Zn1-xFexS and Zn1-yMnyS has been carried out for different Fe (0less than or equal toxless than or equal to0.05) and Mn (0less than or equal toyless than or equal to0.5) concentrations. It is found that both the strengths and the frequencies of the TO and LO modes of ZnS are approximately independent of the Mn (or Fe) concentration. However, as Mn (or Fe) is substituted for Zn, four additional first-order modes with frequencies omega(TO)7.6 cm diameter). Fires in the Baja treatment consumed similar to31% of the large wood, but only 7% in the Alta treatment. Prior to the first pasture fire, TAGB was 40.3 Mg ha(-1) in the Baja treatment, and 20.9 Mg ha(-1) in the Alta treatment. The pasture fires consumed 63% of the TAGB in the Baja sites and 75% of the TAGB in the Alta treatment. Following the pasture fires, the TAGB was 14.8 Mg ha(-1) in the Baja treatment and 7.6 Mg ha(-1) in the Alta treatment. In the first 2 years of land cover change from dry forest to pasture there was a dramatic decline in TAGB (and hence aboveground C pools) totaling 87 and 94% of that of pre-disturbance forests. The total biomass lost via fire and decomposition was 113 and 132 Mg ha(-1); fire accounted for 89-92% of the loss while decomposition/disappearance comprised 2-11% of the total biomass loss. The widespread distribution of tropical dry forests, their high rates of deforestation, and their high rates of biomass consumption during fires suggest that they are significant anthropogenic sources of atmospheric C. The dramatic loss of biomass and associated high degree of fire severity may also affect future site productivity and the capacity for these sites to function as C pools in the future. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000181236900001 L2 - deforestation;fire;forest biomass;land conversion;tropical dry forest;tropical pasture;biomass burning;cattle pastures;fire ecology;BRAZILIAN AMAZON; NUTRIENT POOLS; REGION; LOSSES; COAST SO - Forest Ecology and Management 2003 ;176(1-3):1-12 8454 UI - 8862 AU - Kaya C AU - Higgs D AU - Ince F AU - Amador BM AU - Cakir A AU - Sakar E AD - Univ Hertfordshire, Hatfield AL10 9AB, Herts, EnglandUniv Harran, Fac Agr, Dept Soil Sci, Sanliurfa, TurkeyCol Playa Palo Santa Rita, Ctr Invest Biol Noroeste, La Paz, Baja California, MexicoUniv Harran, Fac Agr, Dept Hort, Sanliurfa, TurkeyHiggs, D, Univ Hertfordshire, Coll Lane, Hatfield AL10 9AB, Herts, England TI - Ameliorative effects of potassium phosphate on salt-stressed pepper and cucumber AB - Bell pepper (Capsicum annuum cv. Urfa Isoto) and cucumber (Cucumis sativus cv. Beith Alpha F1) were grown in pots containing field soil to investigate the effects of supplementary potassium phosphate applied to the root zone of salt-stressed plants. Treatments were (1) control: soil alone (C); (2) salt treatment: C plus 3.5 g NaCl kg(-1) soil (C + S); and (3) supplementary potassium phosphate: C + S plus supplementary 136 or 272 mg KH2PO4 kg(-1) soil (C + S + KP). Plants grown in saline treatment MH - United Kingdom MH - Mexico|Baja California MH - Turkey PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000181752000007 L2 - salinity;bell pepper;cucumber;potassium phosphate;fruit yield;ORYZA-SATIVA-L; SALINITY TOLERANCE; NUTRIENT SOLUTION; SODIUM-CHLORIDE; TOMATO; PHOSPHORUS; CALCIUM; PLANTS; RICE; BARLEY SO - Journal of Plant Nutrition 2003 ;26(4):807-820 8455 UI - 8763 AU - Kaya M AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - He KL AU - Iori M AU - Jun SY AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AR AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Li YS AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Mao CS AU - Mao ZL AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko S AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zukanovich-Funchal R AD - Ball State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Tel Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyKaya, M, Kafkas Univ, Kars, Turkey TI - Production asymmetry of D-s from 600 GeV/c Sigma(-) and pi(-) beam AB - The production of D-S(-) relative to D-S(+) as a function of x(F) with 600 GeV/c Sigma(-) beam is measured in the interval 0.15 < x(F) < 0.7 by the SELEX (E781) experiment at Fermilab. The integrated charge asymmetries with 600 GeV/c Sigma(-) beam (0.53 +/- 0.06) and pi(-) beam (0.06 +/- 0.11) are also compared. The results show the Sigma(-) beam fragments play a role in the production of D-S(-), as suggested by the leading quark model. (C) 2003 Elsevier Science B.V. All rights reserved MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000181989200006 L2 - CHARM SO - Physics Letters B 2003 ;558(1-2):34-40 8456 UI - 4982 AU - Kaziev GZ AU - Dutov AA AU - Quynones S AU - Belskii VK AU - Zavodnik VE AU - Karamnov MA AD - Moscow Pedag State Univ, Moscow, RussiaNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoLY Karpov Phys Chem Res Inst, Moscow, RussiaKaziev, GZ, Moscow Pedag State Univ, Moscow, Russia TI - X-ray diffraction study of piperidine octamolybdate AB - Piperidine octamolybdate [C5H5NH2](4)[Mo8O26].4H(2)O (1) has been synthesized and characterized by X-ray diffraction analysis. Crystals 1 are monoclinic, space group P2(1)/n, a = 12.892(3), b = 9.283(2), c = 19.184(4) Angstrom, beta = 92.50(3)degrees, V = 2293.7(9) Angstrom(3), Z = 2, rho(calc) = 2.317 g/cm(3) MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4766 UR - ISI:000222558000027 L2 - isopolycompounds;X-ray diffraction analysis;piperidine octamolybdate SO - Journal of Structural Chemistry 2003 ;44(5):889-892 8457 UI - 7797 AU - Kaziev GZ AU - Dutov AA AU - Quinones SH AU - Bel'skii VK AU - Zavodnik VE AU - de Ita A AD - Moscow State Pedag Univ, Moscow 119882, RussiaUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaKaziev, GZ, Moscow State Pedag Univ, Ul Malaya Pirogovskaya 1, Moscow 119882, Russia TI - Synthesis and study of gallium hexamolybdocobaltate(III) AB - Gallium hexamolybdocobaltate(III) Ga[CoMo6O18(OH)6] . 16H(2)O (I) was synthesized and characterized by single-crystal X-ray diffraction. The crystals of I are triclinic, space group P (1) over bar, a = 6.791 (1) Angstrom, b = 11.250(2) Angstrom, c = 11.643(2) Angstrom, alpha = 101.29(2)degrees, beta = 96.95(2)degrees, gamma = 102.06(2)degrees, V = 840.8(2) Angstrom(3), Z = 1, rho(calcd) = 2.731 g/cm(3). Compound I was also studied by thennogravimetry and IR spectroscopy MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0036-0236 UR - ISI:000184504300003 SO - Russian Journal of Inorganic Chemistry 2003 ;48(7):972-976 8458 UI - 6261 AU - Kazmi WH AU - Gilbertson D AU - Xue J AU - Obrador GT AU - Pereira BJG AU - Kausz AT AD - Tufts Univ, New England Med Ctr, Dept Med, Div Nephrol, Boston, MA 02111, USAUniv Panamer, Sch Med, Dept Med, Mexico City, DF, MexicoNephrol Analyt Serv, Minneapolis, MN, USA TI - Higher glomerular filtration rate (GFR) at initiation of dialysis is associated with higher mortality MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219101165 SO - Journal of the American Society of Nephrology 2003 ;14():250A-250A 8459 UI - 6262 AU - Kazmi WH AU - Obrador GT AU - Sternberg M AU - Lindberg J AU - Schreiber B AU - Lewis V AU - Pereira BJG AD - Tufts Univ, New England Med Ctr, Dept Med, Div Nephrol, Boston, MA 02111, USAUniv Panamer, Sch Med, Dept Med, Mexico City, DF, MexicoQuartiles Stat Consulting, Atlanta, GA, USAOchsner Hemodialysis, Res Program, New Orleans, LA, USAMed Coll Wisconsin, Dept Med, Milwaukee, WI 53226, USATulane Univ, Sch Publ Hlth & Trop Med, New Orleans, LA 70118, USA TI - Carnitine use is associated with decreased hospital utilization among hemodialysis patients MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219101166 SO - Journal of the American Society of Nephrology 2003 ;14():250A-251A 8460 UI - 6273 AU - Kazmi WH AU - Obrador GT AU - Sternberg M AU - Lindberg J AU - Schreiber B AU - Lewis V AU - Pereira BJG AD - Tufts Univ, New England Med Ctr, Dept Med, Div Nephrol, Boston, MA 02111, USAUniv Panamer, Sch Med, Dept Med, Mexico City, DF, MexicoQuartiles Stat Consulting, Atlanta, GA, USAOchsner Hemodialysis Res Program, New Orleans, LA, USAMed Coll Wisconsin, Dept Med, Milwaukee, WI 53226, USATulane Univ, Sch Publ Hlth, New Orleans, LA 70118, USA TI - Hospitalization risk in dialysis patients with cardiovascular disease (CVD) on L-carnitine MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219103811 SO - Journal of the American Society of Nephrology 2003 ;14():827A-828A 8461 UI - 6636 AU - Keidar I AU - Rajsbaum S AD - Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, IsraelUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoKeidar, I, Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel TI - On the cost of fault-tolerant consensus when there are no faults - A tutorial AB - We consider the consensus problem in realistic partial synchrony and timed asynchronous models where processes can crash. We describe algorithms and lower bounds that show that two communication steps are necessary and sufficient for solving consensus in these models in failure-free executions MH - Israel MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000187497900028 L2 - SYSTEM SO - Dependable Computing 2003 ;2847():366-368 8462 UI - 7717 AU - Keidar I AU - Rajsbaum S AD - Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, IsraelUNAM, Inst Matemat, Mexico City, DF, MexicoKeidar, I, Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel TI - Open questions on consensus performance in well-behaved runs MH - Israel MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000184718100007 L2 - FAILURE DETECTOR; TIME SO - Future Directions in Distributed Computing: Research and Position Papers 2003 ;2584():35-39 8463 UI - 8362 AU - Kelly LM AU - Gonzalez F AD - Univ Nacl Autonoma Mexico, Herbario Nacl Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Colombia, Inst Ciencias Nat, Bogota, ColombiaKelly, LM, New York Bot Garden, Bronx, NY 10458, USA TI - Phylogenetic relationships in Aristolochiaceae AB - A phylogenetic analysis was conducted to examine the monophyly and relationships of the four broadly defined genera of Aristolochiaceae, Seventy-two morphological characters were coded from representatives of these genera and from a broad selection of potential outgroups. The data support monophyly of the Aristolochiaceae and monophyly of the broadly defined genera Aristolochia, Thottea, and Asarum. The genera are grouped into two clades within the family, Thottea + Aristolochia and Asarum + Saruma. Based on the results of these analyses, Asaroideae, which have been circumscribed by some authors to consist of Saruma, Asarum, and Thottea, are paraphyletic, and should be emended to exclude Thottea MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences;Evolutionary Biology U5 - J;Review AV - English IS - 0363-6445 UR - ISI:000183038300003 L2 - SIEVE-ELEMENT PLASTIDS; SARUMA-HENRYI OLIV; ASARUM ARISTOLOCHIACEAE; GYNOECIUM DIVERSITY; PRIMITIVE ANGIOSPERMS; NUCLEOTIDE-SEQUENCES; CLADISTIC-ANALYSIS; BASAL ANGIOSPERMS; GENE RBCL; SYSTEMATICS SO - Systematic Botany 2003 ;28(2):236-249 8464 UI - 5584 AU - Kelter PB AU - Walsh JL AU - Castro-Acuna CM AD - Univ Nacl Autonoma Mexico, Dept Fisicoquim, Mexico City 04510, DF, MexicoUniv N Carolina, Dept Chem, Chapel Hill, NC, USAUniv N Carolina, Dept Chem & Biochem, Greensboro, NC 27402, USA TI - Principles of electrochemistry via the orange juice clock and other demonstrations MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187917801335 SO - Abstracts of Papers of the American Chemical Society 2003 ;225():U329-U329 8465 UI - 7617 AU - Kenyon EM AU - Del Razo L AU - Hughes MF AD - US EPA, PKB, ETD, NHEERL,ORD, Res Triangle Pk, NC 27711, USAIPN, CINVESTAV, Mexico City 07738, DF, Mexico TI - Comparative tissue distribution and urinary excretion of inorganic arsenic (iAs) and its methylated metabolites in mice following oral administration of arsenate (AsV) and arsenite (AsIII) MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518500723 SO - Toxicological Sciences 2003 ;72():148-148 8466 UI - 8485 AU - Keppie JD AU - Nance RD AU - Murphy JB AU - Dostal J AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoOhio Univ, Dept Geol Sci, Athens, OH 45701, USASt Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Tethyan, Mediterranean, and Pacific analogues for the Neoproterozoic-Paleozoic birth and development of peri-Gondwanan terranes and their transfer to Laurentia and Laurussia AB - Modem Tethyan, Mediterranean, and Pacific analogues are considered for several Appalachian, Caledonian, and Variscan terranes (Carolina, West and East Avalonia, Oaxaquia, Chortis, Maya, Suwannee, and Cadomia) that originated along the northern margin of Neoproterozoic Gondwana. These terranes record a protracted geological history that includes: (1) similar to 1 Ga (Carolina, Avalonia, Oaxaquia, Chortis, and Suwannee) or similar to 2 Ga (Cadomia) basement; (2) 750-600 Ma arc magmatism that diachronously switched to rift magmatism between 590 and 540 Ma, accompanied by development of rift basins and core complexes, in the absence of collisional orogenesis; (3) latest Neoproterozoic-Cambrian separation of Avalonia and Carolina from Gondwana leading to faunal endemism and the development of bordering passive margins; (4) Ordovician transport of Avalonia and Carolina across Iapetus terminating in Late Ordovician-Early Silurian accretion to the eastern Laurentian margin followed by dispersion along this margin; (5) Siluro-Devonian transfer of Cadomia across the Rheic Ocean; and (6) Permo-Carboniferous transfer of Oaxaquia, Chortis, Maya, and Suwannee during the amalgamation of Pangea. Three potential models are provided by more recent tectonic analogues: (1) an "accordion" model based on the orthogonal opening and closing of Alpine Tethys and the Mediterranean; (2) a "bulldozer" model based on forward-modelling of Australia during which oceanic plateaus are dispersed along the Australian plate margin; and (3) a "Baja" model based on the Pacific margin of North America where the diachronous replacement of subduction by transform faulting as a result of ridge-trench collision has been followed by rifting and the transfer of Baja California to the Pacific Plate. Future transport and accretion along the western Laurentian margin may mimic that of Baja British Columbia. Present geological data for Avalonia and Carolina favour a transition from a "Baja" model to a "bulldozer" model. By analogy with the eastern Pacific, we name the oceanic plates off northern Gondwana: Merlin (equivalent to Farallon), Morgana (equivalent to Pacific), and Mordred (equivalent to Kula). If Neoproterozoic subduction was towards Gondwana, application of this combined model requires a total rotation of East Avalonia and Carolina through 180degrees either during separation (using a western Transverse Ranges model), during accretion (using,a Baja British Columbia "train wreck" model), or during dispersion (using an Australia "bulldozer" model). On the other hand, Siluro-Devonian orthogonal transfer ("accordion" model) from northern Africa to southern Laurussia followed by a Carboniferous "Baja" model appears to best fit the existing data for Cadomia. Finally, Oaxaquia, Chortis, Maya, and Suwannee appear to have been transported along the margin of Gondwana until it collided with southern Laurentia on whose margin they were stranded following the breakup of Pangea. Forward modeling of a closing, Mediterranean followed by breakup on the African margin may provide a modem analogue. These actualistic models differ in their dictates on the initial distribution of the peri-Gondwanan terranes and can be tested by comparing features of the modem analogues with their ancient tectonic counterparts. (C) 2003 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 36 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000182642100011 L2 - analogues;Neoproterozoic-Paleozoic birth;Peri-Gondwanan terranes;CAPE-BRETON-ISLAND; AVALON COMPOSITE TERRANE; SAN-ANDREAS TRANSFORM; ND ISOTOPIC EVIDENCE; U-PB GEOCHRONOLOGY; NOVA-SCOTIA; SOUTHERN MEXICO; SM-ND; CAROLINA TERRANE; DETRITAL ZIRCON SO - Tectonophysics 2003 ;365(1-4):195-219 8467 UI - 9070 AU - Keppie JD AU - Dostal J AU - Cameron KL AU - Solari LA AU - Ortega-Gutierrez F AU - Lopez R AD - Univ Nacl Autonoma Mexico, Inst Geol, Delegac Coyoacan, Mexico City 04510, DF, MexicoSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaUniv Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064, USAW Valley Coll, Dept Geol, Saratoga, CA 95070, USAKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Delegac Coyoacan, Ciudad Univ Mexico, Mexico City 04510, DF, Mexico TI - Geochronology and geochemistry of Grenvillian igneous suites in the northern Oaxacan Complex, southern Mexico: tectonic implications AB - Chemical and U-Pb isotopic analyses of metaigneous rocks in the northern Oaxacan Complex in southern Mexico indicate that they form part of two granitic-gabbroic suites intruded at similar to 1157-1130 and similar to 1012 Ma, which were metamorphosed under granulite facies conditions between similar to 1004 and 980 Ma. Although the older suite has both within-plate and arc geochemical signatures, the arc characteristics (enrichment of La and Ce relative to Nb, Ta, and Th) are inferred to result from crustal contamination, a conclusion consistent with their negative epsilon(Nd) signatures. The younger suite is spatially associated with anorthosites (from which we were unable to acquire a protolith age), suggesting that collectively it forms part of anorthosite-mangerite-charnockite-granite (AMCG) suites. The tholeiitic nature of the mafic rocks along with the within-plate character of the felsic rocks suggests that they were intruded during extension related to either farfield backarc rifting, rifting above a slab window, or anorogenic intercontinental rifting. Potentially correlative AMCG suites are widespread in Mexico, the Grenville Province of eastern Canada and northeastern USA, and the Andean massifs of Colombia, however, Pb isotopic data most closely resemble those in South America. These data are consistent with published hypotheses that suggest Oaxaquia represents an exotic terrane derived from Amazonia. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 26 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0301-9268 UR - ISI:000181122400006 L2 - geochronology;geochemistry;igneous;Grenvillian;Oaxaquia;Mexico;U-PB GEOCHRONOLOGY; LAURENTIA-GONDWANA LINK; LARGE MAFIC INTRUSION; IVREA-VERBANO ZONE; LOWER CRUST; ANORTHOSITE PETROGENESIS; MASSIF ANORTHOSITE; OROGENIC BELT; WEST TEXAS; PROVINCE SO - Precambrian Research 2003 ;120(3-4):365-389 8468 UI - 8356 AU - Khan AK AU - Jahr JS AU - Nesargi S AU - Rothenberg SJ AU - Tang ZP AU - Cheung A AU - Gunther RA AU - Kost GJ AU - Driessen B AD - Charles R Drew Univ Med & Sci, King Drew Med Ctr, Dept Anesthesiol, Los Angeles, CA 90059, USAUniv Calif Los Angeles, David Geffen Sch Med, Dept Clin Anesthesiol, Los Angeles, CA, USACharles R Drew Univ Med & Sci, Toxicol Lab, Los Angeles, CA 90059, USANatl Publ Hlth Inst, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoUniv Calif Davis, Sch Med, Dept Med Pathol, Davis, CA 95616, USAUniv Calif Davis, Sch Med, Dept Surg, Davis, CA 95616, USAUniv Penn, New Bolton Ctr, Sch Vet Med, Dept Clin Studies, Kennett Sq, PA 19348, USAJahr, JS, Univ Calif Los Angeles, Dept Anesthesiol, Box 951778, Los Angeles, CA 90095 USA TI - Does lead interfere with hemoglobin-based oxygen carrier (HBOC) function? A pilot study of lead concentrations in three approved or tested HBOCs and oxyhemoglobin dissociation with HBOCs and/or bovine blood with varying lead concentrations AB - We measured lead concentrations in three hemoglobin-based oxygen carriers (HBOCs; Oxyglobin((R)), Hemopure((R)), and Hemolink(TM)) and compared them with lead concentrations from blood-bank blood. Oxyhemoglobin dissociation was measured with large concentrations of lead in bovine HBOC, with or without bovine blood, and in bovine blood. Samples of each were prepared by combining one with normal saline (control), the second with small lead concentrations (22 mug/dL), and the third with toxic lead concentrations (70 mug/dL). They were blended in 2 tonometers at oxygen concentrations (2.5%, 5%, 8%, 10%, 21%, and 95%) with 5% CO, and the remainder nitrogen for 5 min per sample after a 15-min wash-in with each level of oxygen and were measured with co-oximetry. Oxygen saturation was plotted against Po-2, fitting fourth-order polynomial nonlinear regression to the data. The lead concentrations of the three HBOCs were 0.51,0.22,0.40 mug/dL. There were no clinically important differences of the oxyhemoglobin dissociation curves as a function of lead concentration. The lead concentrations of the three tested HBOCs were small and no larger than the average for blood-bank blood. The presence of increasing concentrations of lead in either concentrated solution of bovine HBOC or a 1:1 mixture of bovine HBOC and native bovine blood does not appear to affect hemoglobin oxygenation in an acute in vitro model of increased lead concentrations MH - USA MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Anesthesiology U5 - J;Article AV - English IS - 0003-2999 UR - ISI:000183148900047 L2 - CANINE HYPOVOLEMIA MODEL; GLUTAMER-200 BOVINE SO - Anesthesia and Analgesia 2003 ;96(6):1813-1820 8469 UI - 8113 AU - Khan R AU - Tan R AU - Mariscal AG AU - Straney D AD - Univ Maryland, Mol & Cellular Biol Program, College Pk, MD 20742, USAUniv Maryland, Dept Mol Genet & Cell Biol, College Pk, MD 20742, USAUniv Nacl Autonoma Mexico, Fac Quim, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoStraney, D, Univ Maryland, Mol & Cellular Biol Program, College Pk, MD 20742 USA TI - A binuclear zinc transcription factor binds the host isoflavonoid-responsive element in a fungal cytochrome p450 gene responsible for detoxification AB - The PDA1 gene of the filamentous fungus Nectria haematococca MPVI (anamorph: Fusarium solani ) encodes pisatin demethylase, a cytochrome P450. Pisatin is a fungistatic isoflavonoid produced by garden pea (Pisum sativum ), a host for this fungus. Pisatin demethylase detoxifies pisatin and functions as a virulence factor for this fungus. Pisatin induces PDA1 expression both in cultured mycelia as well as during pathogenesis on pea. The regulatory element within PDA1 that provides pisatin-responsive expression was identified using a combination of in vivo functional analysis and in vitro binding analysis. The 40 bp pisatin-responsive element is located 635 bp upstream of the PDA1 transcription start site. This element was sufficient to provide strong pisatin-induced expression to a minimal promoter in vivo and was required for pisatin regulation of the PDA1 promoter. A gene encoding a DNA-binding protein specific to this 40 bp element was isolated from a N. haematococca cDNA library using the yeast one-hybrid screen. The cloned gene possesses sequence motifs found in the binuclear zinc (Cys 6-Zn 2) family of transcription factors unique to fungi. The results suggest that it is a regulator of this fungal cytochrome P450 gene and may provide pisatin-responsive regulation MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000183685000010 L2 - NECTRIA-HAEMATOCOCCA MPVI; IN-VITRO; PDA1 PROMOTER; PISATIN; EXPRESSION; CHROMOSOME; PEA; SUPERFAMILY; RESISTANCE; EVOLUTION SO - Molecular Microbiology 2003 ;49(1):117-130 8470 UI - 7822 AU - Kharchenko VK AD - UNAM, FES Cuautitlan, Estado De Mexico 54768, MexicoSobolev Inst Math, Novosibirsk, RussiaKharchenko, VK, UNAM, FES Cuautitlan, Estado De Mexico 54768, Mexico TI - Constants of coordinate differential calculi defined by Yang-Baxter operators AB - We investigate in details a first order differential calculus with right partial derivatives set up by a not necessarily invertible Yang-Baxter operator. The optimal algebra for this calculus has a natural structure of a braided Hopf algebra and it is isomorphic to the quantum symmetric algebra. The induced to the optimal algebra and to the free cover algebra calculi are right covariant. They are bicovariant if and only if the related braiding is involutive. By means of the P.M. Cohn theory we show that the subalgebra of constants for the cover free differential algebra is a free algebra and an ad-invariant left coideal. If the given algebra is finitely generated then every differential left ideal is generated by constants, a noncommutative Taylor series decomposition formula is valid, and the category of locally nilpotent modules over the operator algebra is semisimple with the only simple object that is isomorphic to the optimal algebra as a module. We find a necessary and sufficient condition for a 1-form to be a complete differential. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Estado De Mexico MH - Russia PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000184522800006 L2 - QUANTUM GROUPS; ALGEBRAS; SHUFFLES; EQUATION SO - Journal of Algebra 2003 ;267(1):96-129 8471 UI - 9401 AU - Kharitonov VL AU - Niculescu SI AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoUniv Technol Compiegne, UMR CNRS 6599, HEUDIASYC, Ctr Rech Royallieu, F-60205 Compiegne, FranceKharitonov, VL, IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, Mexico TI - On the stability linear systems with uncertain delay AB - This note focuses on the stability of some class of delay systems, including uncertainty in the delays. More precisely, we are interested in guaranteeing the stability of perturbed delay systems by assuming the stability of the nominal system. If the delay perturbation is constant, necessary and sufficient conditions are derived in terms of generalized eigenvalue distribution of some (finite-dimensional) constant matrix pencil. If the delay perturbation is time-varying, some sufficient stability conditions are derived using "exact" Lyapunov-Krasovskii functionals. Illustrative examples are also included MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 15 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000180424600015 L2 - delay;Lyapunov functionals;matrix pencils;uncertainty;ROBUST STABILITY; PERTURBATIONS; EQUATIONS SO - Ieee Transactions on Automatic Control 2003 ;48(1):127-132 8472 UI - 9566 AU - Kharitonov VL AU - Zhabko AP AD - CINVESTAV, IPN, Dept Automat Control, Mexico City 07300, DF, MexicoSt Petersburg State Univ, Appl Math & Control Proc Dept, St Petersburg 198904, RussiaKharitonov, VL, CINVESTAV, IPN, Dept Automat Control, AP 14-740, Mexico City 07300, DF, Mexico TI - Lyapunov-Krasovskii approach to the robust stability analysis of time-delay systems AB - In this paper, a procedure for construction of quadratic Lyapunov-Krasovskii functionals for linear time-delay systems is proposed. It is shown that these functionals admit a quadratic low bound. The functionals are used to derive robust stability conditions. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000179966500002 L2 - time-delay system;robust stability SO - Automatica 2003 ;39(1):15-20 8473 UI - 8669 AU - Khomenkova L AU - Korsunska N AU - Yukhimchuk V AU - Jumayev B AU - Torchynska T AU - Hernandez AV AU - Many A AU - Goldstein Y AU - Savir E AU - Jedrzejewski J AD - Inst Semicond Phys, UA-03028 Kiev, UkraineInst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelKhomenkova, L, Inst Semicond Phys, 45 Pr Nauky, UA-03028 Kiev, Ukraine TI - Nature of visible luminescence and its excitation in Si-SiOx systems AB - Photoluminescence (PL) spectra and their temperature dependence, as well as PL excitation and Raman spectra of Si-SiOx systems prepared by RF magnetron sputtering were investigated as a function of Si content. It was shown that PL spectrum of such systems consists of several bands. The correlation of shift of peak position of the lower-energy band from 1.38 to 1.54 eV with the change of size of Si nanocrystallites from 5 to 2.7 nm was observed. It was assumed that this PL band is connected with carrier recombination inside Si nanoparticles or with radiative transitions between a Si band and an interface level. It was shown that peak positions of the other observed bands (at 1.7, 2.06 and 2.32 eV) do not depend on the sizes of Si nanocrystallites. It was suggested that they are connected with silicon oxide defects based on the increase of intensities of these bands with increasing silicon oxide content. It was also shown that the excitation of PL is mainly due to light absorption in silicon nanocrystallites. Participation of hot carriers in excitation of defect-related bands was assumed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000182376000128 L2 - photoluminescence;photoluminescence excitation;Si-SiOx system;temperature dependence;Si nanocrystallites;OXIDIZED POROUS SILICON; OPTICAL-PROPERTIES; ION-IMPLANTATION; LASER-ABLATION; PHOTOLUMINESCENCE; OXYGEN; SPECTRA; FILMS; NANOCRYSTALS; NANOCLUSTERS SO - Journal of Luminescence 2003 ;102():705-711 8474 UI - 8670 AU - Kir'yanov A AU - Aboites V AU - Belovolov AM AU - Damzen MJ AU - Minassian A AU - Timoshechkin MI AU - Belovolov MI AD - Ctr Invest & Opt AC, Guanajuato 37150, MexicoRussian Acad Sci, Inst Gen Phys, Moscow 117942, RussiaUniv London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, EnglandKir'yanov, A, Ctr Invest & Opt AC, Loma Bosque 115 Col Lomas Campestre,Aportado Post, Guanajuato 37150, Mexico TI - Visible-to-near-IR luminescence at stepwise up-conversion in Yb,Ho : GGG under IR diode pumping AB - Powerful visible-to-near-IR luminescence is observed in a Gadolinium Gallium Garnet crystal co-activated with Yb3+ (similar to15 at%) and Ho3+ (similar to 0.1 at%) at CW laser diode excitation (lambda = 938 nm). The main visible emission band is observed in the green with its peak at lambdasimilar to540nm and measured to be about 8-10% with respect to Yb3(+) IR luminescence (lambdasimilar to1000 nm). Red (lambdasimilar to650 nm) and near-IR (lambdasimilar to755 nm) emission bands are also observed but are weaker (about 3-5%). Analysis of the crystal absorption and luminescence spectra allows one to conclude that Yb3+-Ho3+ stepwise up-conversion is the mechanism explaining the phenomenon. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Guanajuato MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000182376000130 L2 - Yb,Ho : GGG;green-to-near-IR luminescence;stepwise up-conversion;diode pumping;RED EMISSION; MU-M; LASER; MECHANISMS; CRYSTALS SO - Journal of Luminescence 2003 ;102():715-721 8475 UI - 8768 AU - Kiss IZ AU - Hudson JL AU - Santos GJE AU - Parmananda P AD - Univ Virginia, Dept Chem Engn, Charlottesville, VA 22903, USAUAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoKiss, IZ, Univ Virginia, Dept Chem Engn, Thornton Hall, Charlottesville, VA 22903 USA TI - Experiments on coherence resonance: Noisy precursors to Hopf bifurcations AB - Experimental and numerical evidence of coherence resonance in an electrochemical system is reported. External noise with a Gaussian distribution is superimposed on the system when the anodic current is exhibiting stationary (fixed point) dynamics below a supercritical Hopf bifurcation. The amplitude of the added stochastic perturbations is increased monotonically and the induced oscillatory behavior is analyzed. It is observed, both in experiments and in simulations, that the regularity of the noise induced current oscillations reaches a maximum value for an optimum noise level. This is indicative of coherence resonance and can be explained with a mechanism based on noisy precursors to a Hopf bifurcation MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000182020900003 L2 - STOCHASTIC RESONANCE; SYSTEM; OSCILLATORS; DYNAMICS; GROWTH SO - Physical Review e 2003 ;67(3): 8476 UI - 8163 AU - Klazar M AU - Luca F AD - Charles Univ, Dept Math Appl, Inst Theoret Comp Sci, Prague 11800, Czech RepublicUNAM, Math Inst, Morelia 58089, Michoacan, MexicoKlazar, M, Charles Univ, Dept Math Appl, Inst Theoret Comp Sci, Malostranske Namesti 25, Prague 11800, Czech Republic TI - On some arithmetic properties of polynomial expressions involving Stirling numbers of the second kind MH - Czech Republic MH - Mexico|Michoacan PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0065-1036 UR - ISI:000183812700005 L2 - DIOPHANTINE EQUATIONS SO - Acta Arithmetica 2003 ;107(4):357-372 8477 UI - 7738 AU - Kleiner M AU - Perez E AD - Syracuse Univ, Dept Math, Syracuse, NY 13244, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 20, DF, MexicoKleiner, M, Syracuse Univ, Dept Math, Syracuse, NY 13244, USA TI - Computation of almost split sequences with applications to relatively projective and prinjective modules AB - Let Lambda be an Artin algebra, let mod Lambda be the category of finitely generated Lambda-modules, and let A subset of mod Lambda be a contravariantly finite and extension closed subcategory. For an indecomposable and not Ext-projective module C is an element of A, we compute the almost split sequence 0 --> A --> B --> C --> 0 in A from the almost split sequence 0 --> DTrC --> E --> C --> 0 in mod Lambda. Since the computation is particularly simple if the minimal right A-approximation of DTr C is indecomposable for all indecomposable and not Ext-projective C is an element of A, we manufacture subcategories A with the desired property using orthogonal subcategories. The method of orthogonal subcategories is applied to compute almost split sequences for relatively projective and prinjective modules MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 1386-923X UR - ISI:000184690500002 L2 - almost split;approximation;Artin algebra;covariantly finite;contravariantly finite;extension closed;Ext-injective;Ext-projective;module;prinjective;relatively projective;sequence;subcategory;HOMOLOGICALLY FINITE SUBCATEGORIES; TILTING MODULES; ALGEBRAS SO - Algebras and Representation Theory 2003 ;6(3):251-284 8478 UI - 7831 AU - Klimley AP AU - Jorgensen SJ AU - Muhlia-Melo A AU - Beavers SC AD - Univ Calif Davis, Bodega Marine Lab, Bodega Bay, CA 94923, USACtr Invest Biol Baja Norte, La Paz, MexicoKlimley, AP, Univ Calif Davis, Dept Wildlife Fish & Conservat Biol, Westside Rd, Davis, CA 95616 USA TI - The occurrence of yellowfin tuna (Thunnus albacares) at Espiritu Santo Seamount in the Gulf of California MH - USA MH - Mexico|Baja California Sur PB - SEATTLE: NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE RP - NOT IN FILE U3 - TC 9 U4 - Fisheries U5 - J;Article AV - English IS - 0090-0656 UR - ISI:000184532200017 L2 - SPHYRNA-LEWINI; FIELD SO - Fishery Bulletin 2003 ;101(3):684-692 8479 UI - 6484 AU - Klimov AB AU - de Guise H AU - Sanchez-Soto LL AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoLakehead Univ, Dept Phys, Thunder Bay, ON P7B 5E1, CanadaUniv Complutense, Fac Fis, Dept Opt, E-28040 Madrid, SpainKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Inequivalent classes of closed three-level systems AB - We show here that the Lambda and V configurations of three-level atomic systems, while they have recently been shown to be equivalent for many important physical quantities when driven with classical fields [M. B. Plenio, Phys. Rev. A 62, 015802 (2000)], are no longer equivalent when coupled via a quantum field. We analyze the physical origin of such behavior and show how the equivalence between these two configurations emerges in the semiclassical limit MH - Canada MH - Mexico|Jalisco MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000187885000130 L2 - ELECTROMAGNETICALLY INDUCED TRANSPARENCY; SPONTANEOUS-EMISSION CANCELLATION; QUANTUM INTERFERENCE; BROADENED RESONANCES; GROUP-VELOCITY; ATOMIC GAS; INVERSION; LASER; STATE; TRANSITIONS SO - Physical Review A 2003 ;68(6): 8480 UI - 8018 AU - Klimov AB AU - Guzman R AU - Retamal JC AU - Saavedra C AD - Univ Guadalajara, Dept Fis, Guadalajara 44410, Jalisco, MexicoUniv Santiago Chile, Dept Fis, Santiago, ChileConcepcion Univ, Dept Fis, Concepcion, ChileKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44410, Jalisco, Mexico TI - Qutrit quantum computer with trapped ions AB - We study the physical implementation of a qutrit quantum computer in the context of trapped ions. Qutrits are defined in terms of electronic levels of trapped ions. We concentrate our attention on a universal two-qutrit gate, which corresponds to a controlled-NOT gate between qutrits. Using this gate and a general gate of an individual qutrit, any gate can be decomposed into a sequence of these gates. In particular, we show how this works for performing the quantum Fourier transform for n qutrits MH - Chile MH - Mexico|Jalisco PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 24 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000183915200042 L2 - ENTANGLEMENT; STATES; DOTS SO - Physical Review A 2003 ;67(6): 8481 UI - 8863 AU - Klimov AB AU - Romero JL AU - Delgado J AU - Sanchez-Soto LL AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoUniv Complutense, Fac Fis, Dept Opt, E-28040 Madrid, SpainKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Master equations for effective Hamiltonians AB - We re-elaborate on a general method for obtaining effective Hamiltonians that describe different nonlinear optical processes. The method exploits the existence of a nonlinear deformation of the su (2) algebra that arises as the dynamical symmetry of the original model. When some physical parameter (usually related to the dispersive limit) becomes small, we immediately get a diagonal effective Hamiltonian that represents correctly the dynamics for arbitrary states and long times. We apply the technique to obtain how the noise terms in the original model transform under this scheme, providing a systematic way of including damping effects in processes described in terms of effective Hamiltonians MH - Mexico|Jalisco MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 13 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000181809100006 L2 - effective Hamiltonians;master equation;decoherence;DEPENDENT COUPLED OSCILLATORS; NONLINEAR DIELECTRIC MEDIA; QUANTUM OPTICS; 2ND-HARMONIC GENERATION; SQUEEZED STATES; STATISTICAL PROPERTIES; COHERENT STATES; DICKE-MODEL; DYNAMICS; PHASE SO - Journal of Optics B-Quantum and Semiclassical Optics 2003 ;5(1):34-39 8482 UI - 9215 AU - Klimov AB AU - Sanchez-Soto LL AU - Delgado J AU - Yustas EC AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoUniv Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Phase states for a three-level atom interacting with quantum fields AB - We introduce phase operators associated with the algebra su(3), which is the appropriate tool to describe three-level systems. The rather unusual properties of this phase are caused by the small dimension of the system and are explored in detail. When a three-level atom interacts with a quantum field in a cavity, a polynomial deformation of this algebra emerges in a natural way. We also introduce a polar decomposition of the atom-field relative amplitudes that leads to a Hermitian relative-phase operator, whose eigenstates correctly describe the corresponding phase properties. We claim that this is the natural variable to deal with quantum interference effects in atom-field interactions. We find the probability distribution for this variable and study its time evolution in some special cases MH - Mexico|Jalisco MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000180804600111 L2 - ELECTROMAGNETICALLY INDUCED TRANSPARENCY; RELATIVE PHASE; SPONTANEOUS EMISSION; DIFFERENCE OPERATOR; STOKES PARAMETERS; GROUP-VELOCITY; 3-LEVEL ATOM; LIGHT; INTERFERENCE; ABSORPTION SO - Physical Review A 2003 ;67(1): 8483 UI - 8758 AU - Klimov VA AU - Timofeeva IO AU - Khanin SD AU - Shadrin EB AU - Il'inskii AV AU - Silva-Andrade F AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUniv Autonoma Puebla, Mexico City, DF, MexicoKlimov, VA, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - Effect of crystallization of amorphous vanadium dioxide films on the parameters of a semiconductor-metal phase transition AB - The hysteresis loops of reflectivity and capacitance of amorphous and polycrystalline vanadium dioxide films in the range of a semiconductor-metal phase transition were studied. The morphology of these films was studied by an atomic-force microscope. It is established that the small number (2-3) of temperature cycles suppress the phase transition due to possible diffusion of oxygen from VO2 clusters into adjacent clusters consisting of the lowest oxides of the Magnelli series. It is shown that the annealing of an amorphous film of vanadium dioxide in oxygen leads to an additional oxidation of low oxides and the formation of VO2, the formation of a polycrystalline film, and the recovery of the phase transition. The above results and the data obtained by atomic-force microscopy are indicative of the high optical quality of the polycrystalline vanadium dioxide films produced by the annealing of amorphous VO2 films. The results also show that these films can be used in interferometers and optical limiters. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7826 UR - ISI:000182111600002 SO - Semiconductors 2003 ;37(4):370-374 8484 UI - 6782 AU - Klimova EI AU - Berestneva TK AU - Cinquantini A AU - Corsini M AU - Zanello P AU - Toscano RA AU - Hernandez-Ortega S AU - Garcia MM AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Siena, Dipartimento Chim, I-53100 Siena, ItalyUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBerestneva, TK, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - 3,3-diethyl- and 3,3-dibenzyl-1,2-diferrocenylcyclopropenes AB - Reactions of 2,3-diferrocenylcyclopropenone 1 with ethyl- and benzylmagnesium chlorides afford 3,3-diethyl- and 3,3-dibenzyl-1,2-diferrocenylcyclopropenes 2 and 3, respectively, and products of nucleophilic opening of the three-membered ring resulting from the addition of RMgCl to the carbonyl group, viz., saturated ketones (4,5-diferrocenylheptan-3-ones 4a, b and 3,4-diferrocenyl-1,5-diphenylpentan-2-ones 5a, b as ca. 3 : 1 mixtures of two diastereomers) and other products. The spatial structures of compounds 2 and 4a were established by X-ray diffraction analysis of single crystals. Protonation of the cyclopropenes 2 and 3 with tetrafluoroboric acid at -40degreesC yields the corresponding 3,3-dialkyl-1,2-diferrocenylcyclopropylium tetrafluoroborates. Transformation of the latter into diferrocenylallylic cations upon increasing the temperature to 20degreesC and their deprotonation under the action of N,N-dimethylaniline were studied. Electrochemical investigation of 1 and 2 shows that in both complexes the cyclopropene spacer allows electronic communication between the two outer ferrocenyl groups, this being notably greater for 2 than for 1 MH - Italy MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1477-0520 UR - ISI:000187000400016 L2 - IMPROVED ELECTROCHEMISTRY; FERROCENYL COMPOUNDS; REARRANGEMENTS; BEHAVIOR; CATIONS SO - Organic & Biomolecular Chemistry 2003 ;1(24):4458-4464 8485 UI - 7032 AU - Klimova EI AU - Berestneva TK AU - Ramirez LR AU - Cinquantini A AU - Corsini M AU - Zanello P AU - Hernandez-Ortega S AU - Garcia MM AD - Natl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Siena, Dipartimento Chim, I-53100 Siena, ItalyNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoKlimova, EI, Natl Autonomous Univ Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - 2,3-diferrocenylcyclopropenone: Synthesis, structure, and some chemical and electrochemical properties AB - Alkylation of ferrocene with tetrachlorocyclopropene in the presence of AlCl3 followed by aqueous workup affords 2,3-diferrocenylcyclopropenone in high yield. We have studied some of this ketone's chemical transformations and electrochemical proper-ties. 2,3-Diferrocenylcyclopropenone withstands thermolysis; it is stable in an acidic medium; the action of tetrafluoroboric acid-diethyl ether results in the formation of diferrocenyl(hydroxy)cyclopropenylium tetrafluoroborate; nucleophiles, including methyllithium and lithium aluminum hydride, react regioselectively with the three-membered ring by opening it to form the respective substituted cis-diferrocenylethenes. We present data from X-ray diffraction analyses of 2,3-diferrocenylcyclopropenone, isopropyl cis-2,3-diferrocenylacrylate, and cis-3,4-diferrocenyl-2-methylbut-3-en-2-ol. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) MH - Italy MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000186458000020 L2 - cyclopropene;ring opening;electrochemistry;ferrocene;FERROCENYL COMPOUNDS; DIPHENYLCYCLOPROPENONE; BEHAVIOR; RING SO - European Journal of Organic Chemistry 2003 ;(21):4265-4272 8486 UI - 8814 AU - Klimova EI AU - Garcia MM AU - Klimova T AU - Ortega SH AU - Bakinovsky LV AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRussian Acad Sci, ND Zelinskii Organ Chem Inst, Moscow 117913, RussiaKlimova, EI, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - 1,3-bis(diarylmethylidene)-2-methylidenecyclohexanes in cycloaddition and cyclodimerization reactions. The role of stereoelectronic factors AB - Cycloaddition and cyclodimerization reactions of 1,3-dibenzylidene- and 1,3-bis(p-methoxybenzylidene)-2-methylidenecyclohexanes, i.e., the diaryltrienes with fixed S-cis-configurations of exocyclic double bonds are studied. These compounds undergo in situ cyclodimerization of the [4+2]-type upon dehydration of the precursor tertiary alcohols and form endo-adducts in the Diels-Alder reaction with N-phenylmaleimide. In the presence of CF3COOH, acid-catalyzed cyclodimerization takes place leading to methylidene-substituted spirocyclodimers, which undergo intramolecular cyclization upon prolonged contact with CF3COOH to form a fused carbocyclic system containing a central, 'three-petal' fragment of six-membered rings MH - Mexico|Distrito Federal MH - Russia PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1477-0520 UR - ISI:000181919400022 L2 - CYCLO-DIMERIZATION; 2-METHYLENE-3-FERROCENYLMETHYLENECAMPHANE SO - Organic & Biomolecular Chemistry 2003 ;1(7):1210-1215 8487 UI - 6426 AU - Kober V AU - Mozerov M AU - varez-Borrego J AD - CICESE, Div Appl Phys, Dept Comp Sci, Ensenada 22860, Baja California, Mexico. Inst Informat Transmiss Problems, Lab Digital Opt, Moscow 101447, Russia. CICESE, Div Appl Phys, Opt Dept, Ensenada 22860, Baja California, Mexico TI - Spatially adaptive algorithm for impulse noise removal from color images AB - An effective method for removal impulse noise in corrupted color images is proposed. The method consists of two steps. Outliers are first detected using spatial relationships between the color image components. Then the detected noise pixels are replaced with the output of the vector median filter over a local spatially connected area excluding the outliers, while noise-free pixels are left unaltered. Simulation results in a test color image show a superior performance of the proposed filtering algorithm comparing with the conventional vector median filter. The comparisons are made using a mean square error, a mean absolute error, and a subjective human visual error criteria MH - Mexico|Baja California MH - Russia T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlevkober@cicese.mx mozer@iitp.ru josue@cicese.mx2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY19C AV - English IS - 0302-9743 UR - ISI:000188097600013 SO - 2003 ;():113-120 8488 UI - 7304 AU - Kober V AU - varez-Borrego J AU - Choi TS AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoKJIST, Dept Mechatron, Kwang San Ku, Kwangju 506712, South KoreaKober, V, CICESE, Div Fis Aplicada, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - Solution of eigenvalue integral equation with exponentially oscillating covariance function AB - Karhunen-Loeve (KL) transform is optimal for many signal detection, communication and filtering applications. An explicit solution of the KL integral equation for a practical case when the covariance function of a stationary process is exponentially oscillating is proposed MH - Mexico|Baja California MH - South Korea PB - TOKYO: IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Hardware & Architecture;Computer Science, Information Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0916-8508 UR - ISI:000185839900035 L2 - Karhunen-Loeve transform;eigenvalue integral equation;EXPANSION SO - Ieice Transactions on Fundamentals of Electronics Communications and Computer Sciences 2003 ;E86A(10):2690-2692 8489 UI - 6241 AU - Koch W AU - Frey B AU - Ruiz JFS AU - Scior T AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 09230, DF, MexicoUniv Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, GermanyBenemerita Univ Autonoma Puebla, Fac Ciencias Quim & Farm, Puebla 72570, MexicoKoch, W, Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Av Guelatao 66,col Ejercito Oriente,Del Iztapalap, Mexico City 09230, DF, Mexico TI - On the restricted and combined use of Rudenberg's approximations in molecular orbital theories of Hartree-Fock type AB - Rudenberg's well-known letter of 1951 entitled "On the Three- and Four-Center Integrals in Molecular Quantum Mechanics" explicitly presents two approximation formulas for four-center repulsion integrals, only. When applied to some types of three-center repulsion integrals, however, these two recipes still imply considerable oversimplifications. Using both one-electron and two-electron routes of Rudenberg's truncated expansion, on the other hand, such shortcomings can be avoided strictly. Starting from four simple "Unrestricted and Combined" (U&C) approximation schemes introduced elsewhere, an improved "Restricted and Combined" (R&C) approximation picture for Fock-matrix elements now will be outlined, which does not tolerate any unnecessary oversimplifications. Although the simplicity of the U&C scheme is lost in this case, R&C-approximated Fock-matrix elements still can be constructed from one- and two-center integrals alone in an effective way. Moreover, due to their dependence on a single geometric parameter, all types of two-center integrals can be calculated in advance for about one hundred fixed interatomic distances at the desired level of sophistication and stored once and for all. A cubic spline algorithm may be taken to interpolate the actual integral value from each precomputed list MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Multidisciplinary U5 - J;Article AV - English IS - 0932-0784 UR - ISI:000188848100012 L2 - unrestricted (and restricted) Hartree-Fock molecular orbitals;integral approximations according to Mulliken and Rudenberg;Zero Differential Overlap (ZDO);Neglect of Diatomic Differential Overlap (NDDO);Extended Huckel Theory (EHT);DIATOMIC DIFFERENTIAL OVERLAP; INTEGRAL APPROXIMATIONS; PROJECTION; EXPANSION; PDDO SO - Zeitschrift fur Naturforschung Section A-A Journal of Physical Sciences 2003 ;58(12):756-784 8490 UI - 6242 AU - Koch W AU - Frey B AU - Ruiz JFS AU - Scior T AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 09230, DF, MexicoUniv Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, GermanyBenemerita Univ Autonoma Puebla, Fac Ciencias Quim & Farm, Puebla 72570, MexicoKoch, W, Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Av Guelatao 66,Col Ejercito Oriente,Del Iztapalap, Mexico City 09230, DF, Mexico TI - On Rudenberg's integral approximations and their unrestricted and combined use in crystal orbital theories of Hartree-Fock type AB - The analysis based on Rudenberg's well-known letter of 1951, which has been outlined for molecules in a preceding contribution, now will be transfered to translational periodic systems in one, two, or three dimensions. Again, when applied unrestrictedly to "Linear Combination of Atomic Orbitals" representations (LCAO) of both "Unrestricted" and "Restricted Hartree-Fock" pictures (UHF and RHF), Rudenberg's integral approximations of Mulliken type lead to a thorough interpretation of "Extended Huckel" crystal orbital theories (EHT). Moreover, Rudenberg's ideas provide us with "Unrestricted and Combined" extensions (U&C) of the widely-used approximation schemes "Zero Differential Overlap" (ZDO) and "Neglect of Diatomic Differential Overlap" (NDDO). An improved variant of EHT is also presented. Corresponding "Restricted and Combined" concepts (R&C), which overcome some shortcomings inherent in Rudenberg's original recipes, will be sketched MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Multidisciplinary U5 - J;Article AV - English IS - 0932-0784 UR - ISI:000188848100013 L2 - unrestricted (and restricted) Hartree-Fock crystal orbitals;integral approximations according to Mulliken and Rudenberg;Zero Differential Overlap (ZDO);Neglect of Diatomic Differential Overlap (NDDO);Extended Huckel Theory (EHT);DIATOMIC DIFFERENTIAL OVERLAP; PROJECTION; EXPANSION; SOLIDS; PDDO SO - Zeitschrift fur Naturforschung Section A-A Journal of Physical Sciences 2003 ;58(12):785-800 8491 UI - 7234 AU - Koleff P AU - Lennon JJ AU - Gaston KJ AD - Comis Nacl Conocimiento & Uso Biodiversidad, Mexico City 14010, DF, MexicoMacaulay Inst, Aberdeen AB15 8QH, ScotlandUniv Sheffield, Dept Anim & Plant Sci, Biodivers & Macroecol Grp, Sheffield S10 2TN, S Yorkshire, EnglandKoleff, P, Comis Nacl Conocimiento & Uso Biodiversidad, Liga Perifer Insurgentes Sur 4903,Pargues Pedrega, Mexico City 14010, DF, Mexico TI - Are there latitudinal gradients in species turnover? AB - Aim To examine the effect on the observed relationship betw een spatial turnover and latitude of both the measure of beta diversity used and the method of analysis. Location The empirical analyses presented herein are for the New World. Methods We take the spatial distributions of the owls of the New World as an exemplar data set to investigate the patterns of beta diversity across latitudes revealed by different analytical methods. To illustrate the strengths and weaknesses of alternative measures of beta diversity and different analytical approaches, we also use a simple random distribution model, focusing in particular on the influence of richness gradients and landmass geometry. Results Our simple spatial model of turnover demonstrates that different combinations of analytical approach and measure of beta diversity can give rise to strikingly different relationships between turnover and latitude. The analyses of the bird data for the owls of the New World demonstrate that this observation extends to real data. Conclusions For the particular assemblage considered, we present strong evidence that species richness declines at higher latitudes, and there is also some evidence that species turnover is greater nearer the equator, despite conceptual and practical difficulties involved in analysing spatial patterns of species turnover. We suggest some ways of overcoming these difficulties MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0960-7447 UR - ISI:000185961200005 L2 - beta diversity;birds;diversity modelling;latitude;macroecology;New World;owls;species turnover;Strigidae;Tytonidae;MEASURING BETA-DIVERSITY; PRESENCE-ABSENCE DATA; NEW-WORLD; SPATIAL-PATTERNS; RICHNESS; TROPICS; BIODIVERSITY; MARSUPIALS; HYPOTHESIS; ECOLOGY SO - Global Ecology and Biogeography 2003 ;12(6):483-498 8492 UI - 7524 AU - Kolmanovskii V AU - Shaikhet L AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoDonetsk State Acad Management, Dept Math Informat & Comp, UA-83015 Donetsk, UkraineKolmanovskii, V, IPN, CINVESTAV, Dept Automat Control, Av Ipn 2508,Ap-14-740,Col SP Zacatensco, Mexico City 07360, DF, Mexico TI - Some conditions for boundedness of solutions of difference Volterra equations MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0893-9659 UR - ISI:000185357200009 L2 - difference Volterra equation;conditions of boundedness SO - Applied Mathematics Letters 2003 ;16(6):857-862 8493 UI - 7921 AU - Kolmanovskii V AU - Shaikhet L AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 08360, DF, MexicoDonetsk State Acad Management, Dept Math Informat & Comp, UA-83015 Donetsk, UkraineKolmanovskii, V, IPN, CINVESTAV, Dept Automat Control, Av IPN 2508,AP 14-740,Col SP Zacatenco, Mexico City 08360, DF, Mexico TI - About one application of the general method of Lyapunov functionals construction AB - Some peculiarities of the general method of Lyapunov functionals construction proposed and developed by the authors during last decade for stability investigation of stochastic hereditary systems are considered. It is shown, in particular, that using this method one can construct a sequence of extended stability regions for stochastic difference Volterra equations. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Ukraine PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000184218900003 L2 - stochastic difference equations;delay;stability;method of Lyapunov functionals construction;EQUATIONS; STABILITY SO - International Journal of Robust and Nonlinear Control 2003 ;13(9):805-818 8494 UI - 6923 AU - Komarkova J AU - Tavera R AD - Acad Sci Czech Republ, Inst Hydrobiol, CZ-37901 Ceske Budejovice, Czech RepublicUniv S Bohemia, CZ-37901 Ceske Budejovice, Czech RepublicUniv Nacl Autonoma Mexico, Sch Sci, Ecol Algae Ecol & Nat Resources Dept, Mexico City 04510, DF, MexicoKomarkova, J, Acad Sci Czech Republ, Inst Hydrobiol, Sadkach 7, CZ-37901 Ceske Budejovice, Czech Republic TI - Steady state of phytoplankton assemblage in the tropical Lake Catemaco (Mexico) AB - Phytoplankton of the tropical lake Catemaco (Veracruz, Mexico) showed similar species composition during samplings from 1993 to 1995. There were two small dominant cyanobacterial species Cylindrospermopsis catemaco Kom.-Legn. et Tavera and Cylindrospermopsis philippinensis (Taylor) Kom., and a group of larger algae and cyanobacteria that were always present, however in smaller numbers: Aulacoseira granulata (Ehr.) Simons morphotype curvata, A. cf. italica (Ehr.) Simons mf. curvata, Fragilaria construens (Her.) Grun., Achnanthes minutissima Kutz., Planktolyngbya circumcreta (G.S. West) Anagn. et Kom., Chroococcus microscopicus Kom.-Legn. et Cronberg. Moreover we found several other scarcely present species. The percentage of total biomass of the two dominant species of Cylindrospermopsis varied between 34 and 81%, but they accounted for 80 to 95% of abundance. Apart from geomorphological features and climate conditions, biological variables played an important role. Fish-stock was formed by filter-feeding native herbivorous species of fish Dorosoma petenense (Gunther), Bramocharax caballeroi (Contreras et Rivera), Astyanax mexicanus (Filippi), and an introduced, also herbivore Oreochromis niloticus (L.). Feeding activity of fish removed large species of algae and cyanobacteria as well as detrital remnants and zooplankton from the water. Smaller, inedible cyanobacteria remained in the water and formed the stable portion of the phytoplankton, dominant both in biomass and abundance. CANOCO analysis of samples and species variability demonstrated results of competition between two species of Cylindrospermopsis: steady state during the dominance of C. catemaco lasting probably for the whole year 1993 (one dry and one wet season) and steady state during the dominance of C. philippinensis in 1994 and 1995. According to the functional classification of phytoplankton suggested by Reynolds et al. (2002), Catemaco dominant assemblage would belong to the functional group S-N MH - Czech Republic MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000186636900016 L2 - tropical lake;shallow lake;phytoplankton;steady state;herbivorous fish;competition;Cylindrospermopsis;BLUE-GREEN-ALGAE; GIZZARD SHAD; COMMUNITY STRUCTURE; TILAPIA; RESERVOIR; INGESTION; IMPACT; FISH SO - Hydrobiologia 2003 ;502(1-3):187-196 8495 UI - 9314 AU - Kondrashov VS AU - Rothenberg SJ AD - Charles R Drew Univ Med & Sci, Toxicol Res Lab, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca 625608, Morelos, MexicoKondrashov, VS, Charles R Drew Univ Med & Sci, Toxicol Res Lab, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Comments on article "Corrections to 'How to calculate lead concentration and concentration uncertainty in XRF in vivo bone lead analysis"' MH - USA MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Letter AV - English IS - 0969-8043 UR - ISI:000180636100008 SO - Applied Radiation and Isotopes 2003 ;58(1):51-54 8496 UI - 7664 AU - Korczyski W AU - Guzman JDC AU - Oziewicz Z AD - Univ Arts & Sci, PL-25353 Kielce, PolandUniv Nacl Autonoma Mexico, Fac Estud Super Cuautitlan, Cuautitalan 54700, Izcalli, MexicoKorczyski, W, Univ Arts & Sci, Ulica Wesola 52, PL-25353 Kielce, Poland TI - Multilevel system as multigraph AB - Graph based models of hierarchical systems are usually seen as "graphs equipped with some refinements", understood as the homomorphisms or (bi)simulations. In such a model it is not possible to consider phenomena happened on different levels of the system. We propose a new formalism of multi-graphs allowing to see a hierarchical system similar as a formula of second order logic, i.e. to consider all levels "at the same time". The concurrency in hierarchical system is modelled in terms of multi-graphs MH - Mexico|Estado De Mexico MH - Poland PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000184831800090 SO - Computational Science - Iccs 2003, Pt Ii, Proceedings 2003 ;2658():832-840 8497 UI - 8406 AU - Kordas K AU - Lopez P AU - Rosado JL AU - Ronquillo D AU - Alatorre J AU - Stoltzfus RJ AD - Johns Hopkins Univ, Baltimore, MD 21205, USAINCMN, Physiol Nutr, Mexico City, DF, MexicoUAQ, Dept Nat Sci, Queretaro, MexicoUNAM, Dept Psychol, Mexico City, DF, MexicoCornell Univ, Div Nutr Sci, Ithaca, NY 14853, USA TI - Effects of iron and zinc supplementation on cognitive function of lead-exposed Mexican children MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796901639 SO - Faseb Journal 2003 ;17(5):A1100-A1100 8498 UI - 6691 AU - Korzhik V AU - Morales-Luna G AU - Marakova I AU - Patino-Ruvalcaba C AD - Program Syst SPECTR, Specialized Ctr, St Petersburg 197342, Russia. IPN, CINVESTAV, Mexico City 07738, DF, Mexico. Odessa natl Polytech Univ, Inst Radio Elect & Telecommun Syst, Odessa, Ukraine. IPN, CINVESTAV, Guadalajara, Jalisco, Mexico TI - Digital watermarking under a filtering and additive noise attack condition AB - We consider a private zero-bit watermark (WM) system in which an unauthorized removal of the WM is restricted by a linear filtering of the watermarked message combined with additive noise attack. It is assumed that a WM detector knows both the original cover message (CM) and the pulse (or frequency) response of the attack filter. The formulas to calculate the WM-missing and WM-false alarm probabilities are developed and proved. We conclude that whenever some filtering of the watermarked message is yet acceptable with respect to CM quality then there results in a degradation of the WM system even if the designer of the WM uses an optimal signal. This fact is different than most that can be found at current WM literature. The main properties of a WM system under a filtering and additive noise attack condition are confirmed by simulations of the watermarked images MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Russia MH - Ukraine T3 - COMPUTER NETWORK SECURITYLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY02M AV - English IS - 0302-9743 UR - ISI:000187294700032 L2 - watermark;linear filtering;correlation detector;error probability;white and colored additive noise SO - 2003 ;():371-382 8499 UI - 7656 AU - Korzhik V AU - Morales-Luna G AU - Marakov D AU - Marakova I AD - State Univ Telecommun, Telecommun Secur Dept, St Petersburg, RussiaIPN, CINVESTAV, Comp Sci Sect, Mexico City 07360, DF, MexicoOdessa Natl Polytech Univ, Inst Radio Elect & Telecommun Syst, Odessa, UkraineKorzhik, V, State Univ Telecommun, Telecommun Secur Dept, St Petersburg, Russia TI - Watermarking of binary messages in conditions of an additive binary noise attack AB - In this letter, we consider a private watermarking system (WM) for binary cover messages (CMs). The goal of an attacker is to render unable the WM-owner of WM detection without noticeable corruption of CMs. Here, we restrict the attacker's activity to modulo two addition of a binary noise sequence to the watermarked stegomessage (SM). The formulas for the probabilities of WM-missing and WM-false alarm are obtained. We prove that the WM procedure can be designed to be reliable without significant distortions and for medium length of CMs even in the case. in which CMs are unknown by the WM detector MH - Mexico|Distrito Federal MH - Russia MH - Ukraine PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1070-9908 UR - ISI:000184890200008 L2 - optimum signal processing;probability of WM-false alarm;probability of WM-missing;watermarking SO - Ieee Signal Processing Letters 2003 ;10(9):277-279 8500 UI - 7768 AU - Kosarev AI AU - Torres AJ AU - Zuniga C AU - Abramov AS AU - Rosales P AU - Sibaja A AD - Natl Inst Astrophys Opt & Elect, Puebla 7200, MexicoAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaKosarev, AI, Natl Inst Astrophys Opt & Elect, Apdo Postal 51&216, Puebla 7200, Mexico TI - Effect of hydrogen dilution on electronic properties of a-SiHx films deposited by low-frequency plasma AB - The effect of hydrogen dilution during plasma deposition on hydrogen incorporation and the optical and electrical properties of a-SiHx films were studied. The films were grown in capacitive low-frequency (f = 10 and 110 kHz) discharge in SiH4 diluted with H, varying the ratio R-H of the gases H-2/SiH4 from R-H = 0 to 40. The optical absorption coefficient and optical bandgap were changed with R-H. Si-H bonding, studied by infrared spectroscopy, depended on R,. Hydrogen concentration in the films estimated from infrared spectra was in the range 20-30%. We observed the significant effect of R-H on the temperature dependence of conductivity sigma(T) and on the subgap absorption spectra measured by the constant photocurrent method. The reduction of subgap absorption up to 1.5 order of magnitude was observed with increasing R-H MH - Mexico|Puebla MH - Russia PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000184611200029 L2 - SOLAR-CELL APPLICATION; AMORPHOUS-SILICON; GLOW-DISCHARGE; OPTICAL-CONSTANTS; SURFACE-ROUGHNESS; GROWTH; MECHANISMS; SPECTRA; SILANE; GE SO - Journal of Materials Research 2003 ;18(8):1918-1925 8501 UI - 7412 AU - Koschella A AU - Heinze T AU - Armenta JLR AU - Martinez AMM AD - Berg Univ Gesamthsch Wuppertal, D-42097 Wuppertal, GermanyInst Tecnol Cd Madero, Div Estudios Posgrado & Invest, Cd Madero 89440, Tamaulipas, MexicoKoschella, A, Berg Univ Gesamthsch Wuppertal, FB 9,Gauss Str 20, D-42097 Wuppertal, Germany TI - Novel blends from agave fibers and poly(methyl methaerylate) AB - Cellulose-rich fibers were isolated from Agave lechuguilla (AL) and Agave fourcroydes (AF) growing in the Mexican northeast. These fibers are a valuable feedstock for the preparation of blends with synthetic polymers like poly(methyl methacrylate), PMMA. Blends of different types of agave fibers (dewaxed, mercerized, and grafted) and PMMA were prepared and investigated by means of tension measurements and dynamic mechanical analysis. The fiber-containing blends are more stable than the plain PMMA. Surprisingly, the mechanical stability of the blends is practically independent of the pretreatment of the fibers. Methyl methacrylate (MMA) was grafted onto the biopolymer fibers initiated by the cerammonium nitrate redox initiator. Grafting yields of 26.5% were realized with fibers from AL while up to 75.8% MMA was grafted onto fibers from AF. The materials were characterized by means of FTIR spectroscopy and DSC MH - Germany MH - Mexico|Tamaulipas PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1360 UR - ISI:000185503500021 L2 - biopolymers;composites;fibers;graft copolymers;GRAFT-COPOLYMERIZATION; ACRYLONITRILE; CELLULOSE SO - Macromolecular Symposia 2003 ;197():219-229 8502 UI - 9136 AU - Kosevich YA AU - Ahn K AU - Kim MW AD - IICO UASLP, San Luis Potosi, MexicoKorea Adv Inst Sci & Technol, Taejon 305701, South KoreaKosevich, YA, IICO UASLP, San Luis Potosi, Mexico TI - Reevaluation of the crossover from elastic to capillary surface waves on soft gels MH - Mexico|San Luis Potosi MH - South Korea PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0031-9007 UR - ISI:000180918300065 SO - Physical Review Letters 2003 ;90(5): 8503 UI - 7714 AU - Kostoglodov V AU - Singh SK AU - Santiago JA AU - Franco SI AU - Larson KM AU - Lowry AR AU - Bilham R AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Colorado, Dept Phys, Boulder, CO 80309, USAUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USABilham, R, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - A large silent earthquake in the Guerrero seismic gap, Mexico AB - [1] Geodetic measurements from a network of permanent GPS stations along the Pacific coast of Mexico reveal a large "silent earthquake'' along the segment of the Cocos-North American plate interface identified as the Guerrero seismic gap. The event began in October of 2001 and lasted for 6 7 months. Average slip of similar to10 cm produced measurable displacements over an area of similar to550 x 250 km(2). The equivalent moment magnitude of the event was M-w similar to 7.5. Recognition of this and previous slow event here indicate that the seismogenic portion of the plate interface is not loading steadily, as hitherto believed, but is rather partitioning the stress buildup with episodic, as opposed to steady-state or periodic, slip downdip of the seismogenic zone. This process increases the stress at the base of the seismogenic zone, bringing it closer to failure. These results call for a reassessment of the seismic potential of Guerrero and other seismic gaps in Mexico MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 28 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000184804900001 L2 - subduction;slow aseismic transient;seismic gap;TECTONIC IMPLICATIONS; SUBDUCTION ZONE; SLIP EVENT; PLATE; JAPAN SO - Geophysical Research Letters 2003 ;30(15): 8504 UI - 6401 AU - Kotov AA AU - Elias-Gutierrez M AU - Nieto MG AD - AN Severtsov Inst Ecol & Evolut, Moscow 119071, RussiaECOSUR, Chetumal 77900, Quintana Roo, MexicoEl Colegio Frontera Sur, Tapachula, Chiapas, MexicoKotov, AA, AN Severtsov Inst Ecol & Evolut, Leninsky Prospect 33, Moscow 119071, Russia TI - Leydigia louisi louisi Jenkin, 1934 in the Neotropics, L-louisi mexicana n.subsp in the Central Mexican highlands AB - Leydigia louisi Jenkin, 1934 was recently redescribed by Kotov (2003). We found in Guatemala and South of Mexico populations of this species, similar with the typical African form. A re-examination of Daday's (1902) specimens from Patagonia demonstrated that his material, determined as L. leydigi, was also L. louisi. At the same time, we describe a new subspecies Leydigia louisi mexicana n.subsp. from four water bodies on the central Mexican plateau (State of Mexico). Parthenogenetic females, ephippial females, juvenile and adult males are described. SEM illustrations are given for L. louisi mexicana n.sp. It differs from the nominotypical subspecies by (1) ocellus of irregular shape; (2) chitinous insertions within distal segments of swimming setae far from bases of segments; (3) on IDL, 3 bunches of very long setules; (4) setules on distal lobe of limb II long; (5) longest seta of exopodite III with long, fine setules; (6) seta I of exopodite IV relatively short; (7) a two-lobed body on inner margin of limb V. Features 2-6 were never used in the genus previously, but were applied in the systematics of other genera of Chydoridae. The ranges of these two subspecies are, probably, the Neotropical and Holarctic regions MH - Mexico|Chiapas MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000188455700021 L2 - Leydigia;Chydoridae;Anomopoda;Cladocera;new subspecies;redescription;systematics;Mexico;NEOVOLCANIC PROVINCE; CHYDORIDAE; CLADOCERA; ANOMOPODA; BRANCHIOPODA; TAXA; KEY SO - Hydrobiologia 2003 ;510(1-3):239-255 8505 UI - 8625 AU - Kotov AA AD - AN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaKotov, AA, Colegio Frontera Sur, Km 2 Carretera Chetumal Bacalar,Zona Ind 2, Chetumal 77000, Quintana Roo, Mexico TI - Separation of Leydigia louisi Jenkin, 1934 from L-leydigi (Schoedler, 1863) (Chydoridae, Anomopoda, Cladocera) AB - The aim of the present article was to contribute to the systematics of the leydigi-like species of Leydigia consisting of a few (probably 3) formal species with: (1) a large basal spine on the postabdominal claw (as long as claw thickness at the base); (2) a short setulation at anterior margin of labral keel; (3) no longitudinal striation on the female valves; (4) at least three lateral setae in each fascicle on the postabdomen; (5) three large lateral setae on exopodite III. The morphology of L. leydigi (Schoedler, 1863) and L. louisi Jenkin, 1934 are redescribed, and type material of L. macrodonta Sars, 1916 is studied. In contrast to previous suggestions (Jenkin, 1934; Smirnov, 1971), I found that: (1) L. louisi is a valid species, not a subspecies of L. macrodonta; (2) L. macrodonta is not a member of the L. leydigi-group. The third member of leydigi-group, Leydigia macrodonta longiseta Chen Shou-zhong, 1992, was described from China. It is not a subspecies of L. macrodonta, but a relative of L. leydigi; most probably, it is a valid species, but this opinion must to be confirmed by examination of original Asian material. In this article, the presence of L. leydigi in Palearctic only, and that of L. louisi in only Africa was confirmed. A new subspecies of L. louisi, found in Mexico, will be reported separately MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000182463800013 L2 - Cladocera;Chydoridae;Aloninae;Leydigia;systematics;morphology;redescription;Europe;North America;Africa;NEOVOLCANIC PROVINCE; 1969 CHYDORIDAE; BRANCHIOPODA; REDESCRIPTION; VASILJEVA; SMIRNOV; MEXICO SO - Hydrobiologia 2003 ;490(1-3):147-168 8506 UI - 7397 AU - Kotto-Kome AC AU - Garcia ML AU - Calhoun DA AU - Christensen RD AD - Univ S Florida, All Childrens Hosp, Dept Pediat, Coll Med,Div Neonatol, St Petersburg, FL 33701, USANatl Inst Perinatol, Div Neonatol, Mexico City, DF, Mexico TI - Effect of recombinant erythropoietin administered "early" to very low birth weight (VLBW) infants, on erythrocyte transfusions: A meta-analysis MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000181897902058 SO - Pediatric Research 2003 ;53(4):362A-362A 8507 UI - 8263 AU - Kovarova M AU - Odom S AU - Furumoto Y AU - Gonzalez-Espinosa C AU - Gomez G AU - Harder KW AU - Rivera J AD - NIH, NIAMS, Bethesda, MD 20892, USACINVESTAV Zona Sur, Mexico City, DF, MexicoLudwig Inst Canc Res, Melbourne, Vic 3050, Australia TI - Lyn kinase is required for Csk-binding protein (Cbp) phosphorylation and negative regulation of Fyn kinase in mast cells MH - Australia MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000182367000058 SO - Faseb Journal 2003 ;17(7):C12-C12 8508 UI - 7927 AU - Kravchenko VF AU - Ponomarev VI AU - Pustovoit VI AU - Sanchez-Garcia JC AD - Russian Acad Sci, Inst Radio Engn & Elect, Moscow 103907, RussiaInst Politecn Nacl, Mexico City 04430, DF, MexicoRussian Acad Sci, Sci & Technol Ctr Unique Instrumentat, Moscow 117342, RussiaKravchenko, VF, Russian Acad Sci, Inst Radio Engn & Elect, Ul Mokhovaya 18, Moscow 103907, Russia TI - Robust nonlinear filtration of noisy-image sequences MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 1028-3358 UR - ISI:000184223300009 L2 - DETAILS SO - Doklady Physics 2003 ;48(6):296-302 8509 UI - 6791 AU - Kravchenko VG AU - Kravchenko VV AD - Univ Algarve, Fac Ciencias & Tecnol, P-8000 Faro, PortugalInst Politecn Nacl, Dept Telecommun, SEPI ESIME Zacatenco, Mexico City 07738, DF, MexicoKravchenko, VG, Univ Algarve, Fac Ciencias & Tecnol, Campus Gambelas, P-8000 Faro, Portugal TI - Quaternionic factorization of the Schrodinger operator and its applications to some first-order systems of mathematical physics AB - We show that an ample class of physically meaningful partial differential systems of first order such as the Dirac equation with different one-component potentials, static Maxwell's system and the system describing the force-free magnetic fields are equivalent to a single quaternionic equation which in its turn reduces in general to a Schrodinger equation with quaternionic potential, and in some situations this last can be diagonalized. The rich variety of methods developed for different problems corresponding to the Schrodinger equation can be applied to the systems considered in the present work MH - Mexico|Distrito Federal MH - Portugal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000186916000009 L2 - FREE MAGNETIC-FIELDS; INHOMOGENEOUS-MEDIA; BELTRAMI FIELDS; NONCONSTANT; EQUATIONS SO - Journal of Physics A-Mathematical and General 2003 ;36(44):11285-11297 8510 UI - 6735 AU - Kremer M AU - Quintanilla-Martinez L AU - Fuchs M AU - Gamboa-Dominguez A AU - Haye S AU - Kalthoff H AU - Rosivatz E AU - Hermannstadter C AU - Busch R AU - Hofler H AU - Luber B AD - Tech Univ Munich, Klinikum Rechts Isar, Inst Allgemeine Pathol & Pathol Anat, D-8000 Munich, GermanyGSF Forschungszentrum Umwelt & Gesundheit, Inst Pathol, Neuherberg, GermanyInst Nacl Nutr Salvador Zubiran, Dept Pathol, Mexico City 14000, DF, MexicoKlin Allgemeine Chirurg & Thoraxchirurg, Kiel, GermanyTech Univ Munich, Klinikum Rechts Isar, Inst Med Stat & Epidemiol, D-8000 Munich, GermanyLuber, B, Tech Univ Munich, Klinikum Rechts Isar, Inst Allgemeine Pathol & Pathol Anat, D-8000 Munich, Germany TI - Influence of tumor-associated E-cadherin mutations on tumorigenicity and metastasis AB - In this study, we investigated whether tumor-associated E-cadherin mutations impair the tumor-suppressive function of the cell adhesion molecule and influence metastasis formation in a severe combined immunodeficiency mouse model. The investigated E-cadherin mutations were in frame deletions of exons 8 (del 8) or 9 (del 9) and a point mutation in exon 8 (p8). Transfected human MDA-MB-435S carcinoma cells stably expressing wild-type (wt) or mutant E-cadherin were injected into the mouse mammary fat pad. Mice transplanted with wt E-cadherin transfectants developed significantly smaller tumors than animals transplanted with the E-cadherin-negative parental cell line. Animals transplanted with del 9 or p8 E-cadherin transfectants produced medium size tumors, indicating that these mutations impair the tumor-suppressive function of E-cadherin. In contrast, mice transplanted with del 8 E-cadherin transfectants developed tumors of approximately the same sizes as animals transplanted with wt E-cadherin expressing cells. Lung metastases were induced by all cell lines without significant differences. Immunohistochemical analysis of E-cadherin expression in the tumors revealed a heterogeneous staining pattern, indicating loss or down-regulation of E-cadherin in some tumor cells. Metastases were completely negative for E-cadherin. Our data suggest that the type of mutation determines whether the tumor-suppressive function of E-cadherin is impaired MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 8 U4 - Oncology U5 - J;Article AV - English IS - 0143-3334 UR - ISI:000187219100003 L2 - FAMILIAL GASTRIC-CANCER; TRANSCRIPTION FACTOR SNAIL; CELL-ADHESION; GENE-MUTATIONS; BETA-CATENIN; BREAST-CARCINOMA; EXPRESSION; PROTEIN; INVASION; INACTIVATION SO - Carcinogenesis 2003 ;24(12):1879-1886 8511 UI - 7929 AU - Kritsky DC AU - Mendoza-Franco E AD - Idaho State Univ, Dept Hlth & Nutr Sci, Coll Hlth Profess, Pocatello, ID 83209, USANatl Polytech Inst, Ctr Res & Adv Studies, Parasitol Lab, Yucatan 97310, MexicoKritsky, DC, Idaho State Univ, Dept Hlth & Nutr Sci, Coll Hlth Profess, Campus Box 8090, Pocatello, ID 83209 USA TI - Neotropical monogenoidea. 42. Pavanelliella scaphiocotylus sp nov (Dactylogyridae) from the nasal cavity of the Guatemalan chulin, Rhamdia guatemalensis (Siluriformes : Heptapteridae), from a Cenote on the Yucatan Peninsula, Mexico AB - The generic diagnosis of Pavanelliella (Monogenoidea: Dactylogyridae) is emended to include species with rounded, cephalic margins and well-developed haptors set off from the trunk by a peduncle. Pavanelliella scaphiocotylus sp. nov. is described from the nasal cavity of the Guatemalan chulin, Rhamdia guatemalensis (Heptapteridae), from Ixin-ha Cenote, Yucatan, Mexico. The new species differs from its congener, Pavanelliella pavanellii, in possessing a well-developed haptor and peduncle, a coiled male copulatory organ comprising 5-6 counterclockwise rings, and a vaginal canal with 4-5 loops MH - USA MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 2 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000184193900006 L2 - Monogenoidea;Dactylogyridae;Pavanelliella;Pavanelliella scaphiocotylus sp nov.;Guatemalan chulin;Rhamdia guatemalensis;nasal cavity;Cenote;Mexico;ANCYROCEPHALINAE; GENUS SO - Comparative Parasitology 2003 ;70(2):136-139 8512 UI - 7220 AU - Kroe RR AU - Regan J AU - Proto A AU - Peet GW AU - Roy T AU - Landro LD AU - Fuschetto NG AU - Pargellis CA AU - Ingraham RH AD - Boehringer Ingelheim Pharmaceut Inc, Dept Immunol & Inflammat, Ridgefield, CT 06877, USABoehringer Ingelheim Pharmaceut Inc, Dept Med Chem, Ridgefield, CT 06877, USAUniv Autonoma Guadalajara, Guadalajara 45110, Jalisco, MexicoBoehringer Ingelheim Pharmaceut Inc, Dept Biometr & Data Management, Ridgefield, CT 06877, USABristol Cent High Sch, Bristol, CT 06010, USAKroe, RR, Boehringer Ingelheim Pharmaceut Inc, Dept Immunol & Inflammat, 900 Ridgebury Rd,POB 368, Ridgefield, CT 06877 USA TI - Thermal denaturation: A method to rank slow binding, high-affinity p38 alpha MAP kinase inhibitors AB - It has been reported that the diaryl urea class of p38alpha inhibitors binds to p38 map kinase with both high affinity and slow binding kinetics (Pargellis et al. Nat. Struct. Biol. 2002, 9, 268-272). The slow binding kinetics of this class of inhibitors is believed to be the result of binding to an allosteric pocket adjacent to the p38alpha active site. The use of traditional kinetic and equilibrium methods to measure the binding affinity of this class of compounds has created many challenges for determination of structure-activity relationships (SAR). The thermal denaturation method provides a means of measuring high-affinity interactions. In this paper, the method of thermal denaturation will be described as it has been applied to the diaryl urea class of p38 map kinase inhibitors MH - USA MH - Mexico|Jalisco PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Chemistry, Medicinal U5 - J;Article AV - English IS - 0022-2623 UR - ISI:000185991100007 L2 - DIFFERENTIAL SCANNING CALORIMETRY; PROTEIN SO - Journal of Medicinal Chemistry 2003 ;46(22):4669-4675 8513 UI - 6538 AU - Krokhin AA AU - Arriaga J AU - Gumen LN AD - Univ N Texas, Dept Phys, Denton, TX 76203, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Popular Autonoma Estado Puebla, Puebla 72160, MexicoKrokhin, AA, Univ N Texas, Dept Phys, POB 311427, Denton, TX 76203, USA TI - Speed of sound in periodic elastic composites AB - We consider the low-frequency limit (homogenization) for propagation of sound waves in periodic elastic medium (phononic crystals). Exact analytical formulas for the speed of sound propagating in a three-dimensional periodic arrangement of liquid and gas or in a two-dimensional arrangement of solids are derived. We apply our formulas to the well-known phenomenon of the drop of the speed of sound in mixtures. For air bubbles in water we obtain a perfect agreement with the recent results of coherent potential approximation obtained by M. Kafesaki, R. S. Penciu, and E. N. Economou [Phys. Rev. Lett. 84, 6050 (2000)] if the filling of air bubbles is far from close packing. When air spheres almost touch each other, the approximation gives 10 times lower speed of sound than the exact theory does MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000187719300026 L2 - BAND-STRUCTURE; WAVES; MEDIA; GAP SO - Physical Review Letters 2003 ;91(26): 8514 UI - 9132 AU - Krupski P AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoKrupski, P, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Means on solenoids AB - It is determined which solenoids admit 2-argument continuous means MH - Mexico|Distrito Federal MH - Poland PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000181046000035 L2 - mean;solenoid SO - Proceedings of the American Mathematical Society 2003 ;131(6):1931-1933 8515 UI - 9574 AU - Krupski P AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoKrupski, P, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - More non-analytic classes of continua AB - The method of [U. Darji, Topology Appl. 103 (2000) 243-248] is extended to get the coanalytic hardness of many classes of metric continua. For instance: (1) the family of all continua in I-n, n greater than or equal to 2, that admit only arcs (simple closed curves) as chainable (circularly chainable) subcontinua is coanalytic complete; (2) the family of all continua in I-n, n greater than or equal to 2 (n greater than or equal to 3), which contain no copy of a given nondegenerate chainable (circularly chainable) continuum Y is coanalytic hard; if Y is an arc or a pseudo-arc (a simple closed curve or a pseudo-solenoid), then the family is coanalytic complete; (3) the family of all tree-like continua that contain no hereditarily decomposable subcontinua is coanalytic hard; (4) the family of all lambda-dendroids that contain no arcs is coanalytic complete; (5) the sets of all countable-dimensional continua and of all weakly infinite-dimensional continua in the Hilbert cube are coanalytic hard; strongly countable-dimensional continua form a coanalytic complete family. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000179826300001 L2 - coanalytic set;coanalytic complete;chainable continuum;inverse limit;clump of continua;lambda-dendroid;tree-like continuum;pseudo-arc;pseudo-solenoid;countable-dimensional;weakly infinite-dimensional SO - Topology and Its Applications 2003 ;127(3):299-312 8516 UI - 6667 AU - Kryshtab TG AU - Korsunska NO AU - Sadofyev YG AU - Kladko VP AU - Borkovska LV AU - Mazin MO AU - Kushnirenko VI AU - Gudymenko OI AU - Venger YF AD - IPN, ESFM, Dept Mat Sci, Mexico City 07738, DF, MexicoV Lashkaryov Inst Semicond Phys, UA-03028 Kiev, UkraineRAS, PN Lebedev Phys Inst, Moscow 117924, RussiaKryshtab, TG, IPN, ESFM, Dept Mat Sci, Ed 9 UPALM, Mexico City 07738, DF, Mexico TI - Investigation of intrinsic defects and their distribution in CdSe/ZnSe quantum dot structures AB - The intrinsic defects and their distribution in CdSe/ZnSe self-assembled quantum dot heterostructures grown under variation of VI/II group beam pressure ratio are investigated by luminescent and high-resolution X-ray diffraction methods. In all samples the self-activated emission connected with donor-acceptor pairs V-Zn-D is found. Analysis of excitation spectra of this band shows that vacancy related defects are mainly localised in ZnCdSe wetting layer. It is found that increase of Se beam pressure results in: (i) the increase of the number of metal vacancy related defects and their appearance on nanoisland interface; (ii) enhancement of Cd/Zn interdiffusion process; (iii) the decrease of Cd content in nanoislands and suppression of nanoisland formation. It is proposed that observed transformation of nanoisland emission band is mainly caused by enhancement of interdiffusion process. (C) 2003 Published by Elsevier B.V MH - Mexico|Distrito Federal MH - Russia MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0928-4931 UR - ISI:000187403500011 L2 - molecular beam epitaxy;II-VI semiconductors;quantum dots;HRXRD;PL;SUPERLATTICES; WELLS SO - Materials Science & Engineering C-Biomimetic and Supramolecular Systems 2003 ;23(6-8):715-719 8517 UI - 7200 AU - Kubo I AU - Chen QX AU - Nihei K AU - Calderon JS AU - Cespedes CL AD - Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720, USAUNAM, Inst Quim, Dept Nat Prod, Mexico City 04510, DF, MexicoKubo, I, Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA TI - Tyrosinase inhibition kinetics of anisic acid AB - Anisic acid (p-methoxybenzoic acid) was characterized as a tyrosinase inhibitor from aniseed, a common food spice. It inhibited the oxidation of L-3,4-dihydroxyphenylalanine (L-DOPA) catalyzed by tyrosinase with an IC50 of 0.60 mm. The inhibition of tyrosinase by anisic acid is a reversible reaction with residual enzyme activity. This phenolic acid was found to be a classical noncompetitive inhibitor and the inhibition constant K-I was obtained as 0.603 mm. Anisic acid also inhibited the hydroxylation of L-tyrosine catalyzed by tyrosinase. The lag phase caused by the monophenolase activity was lengthened and the steady-state activity of the enzyme was decreased by anisic acid MH - USA MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000185928600021 L2 - tyrosinase inhibitory activity;anisic acid;noncompetitive inhibition kinetics;ACTIVE-SITE; BINDING SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2003 ;58(9-10):713-718 8518 UI - 7201 AU - Kubo I AU - Kinst-Hori I AU - Nihei K AU - Soria F AU - Takasaki M AU - Calderon JS AU - Cespedes CL AD - Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720, USAUNAM, Inst Quim, Dept Nat Prod, Mexico City 04510, DF, MexicoKubo, I, Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA TI - Tyrosinase inhibitors from galls of Rhus javanica leaves and their effects on insects AB - As a defense mechanism of the leaves of Rhus javanica (Anacardiaceae) against the aphid Melaphis chinensis (Aphididae) attack, tannic acid is rapidly accumulated and forms galls along the midrib of the leaves resulting in a unique natural medicine Gallae Rhois. Tannic acid was found to inhibit the oxidation Of L-3,4-dihydroxyphenylalanine (L-DOPA) catalyzed by tyrosinase (EC 1.14.18.1) with an IC50 of 22mum. The aphid would detoxify the ingested toxic tannic acid to relatively nontoxic gallic acid, whereas the non-adapted pink bollworm Pectinophora gossypiella larvae are sensitive to the ingested tannic acid MH - USA MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000185928600022 L2 - gallae rhois;tyrosinase inhibitory activity;insect growth inhibitory activity;ARMYWORM SPODOPTERA-FRUGIPERDA; CONSTITUENTS; BINDING; OXIDASE; TANNINS SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2003 ;58(9-10):719-725 8519 UI - 8235 AU - Kubo J AU - Mondragon A AU - Mondragon M AU - Rodriguez-Jauregui E AD - Kanazawa Univ, Inst Theoret Phys, Kanazawa, Ishikawa 9201192, JapanUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoKubo, J, Kanazawa Univ, Inst Theoret Phys, Kanazawa, Ishikawa 9201192, Japan TI - The flavor symmetry AB - Assuming that the lepton, quark and Higgs fields belong to the three-dimensional reducible representation of the permutation group S-3, we suggest a minimal S-3 invariant extension of the standard model. We find that in the leptonic sector, the exact S-3 x Z(2) symmetry, which allows 6 real independent parameters, is consistent with experimental data and predicts the bi-maximal mixing of the left-handed neutrinos and that the third neutrino is the lightest neutrino. Z(2) is anomaly-free, but it forbids CP-violations in the leptonic, as well as in the hadronic sector. Therefore, the origin of CP-violations can be identified with the breaking of the Z(2) symmetry, which may be understood in a more fundamental theory. With the exact S-3 only, there are 10 real independent parameters and one independent phase, on which the Cabibbo-Kobayashi-Maskawa mixing matrix V-CKM depends. A set of values of these parameters that are consistent with experimental observations is given MH - Japan MH - Mexico|Distrito Federal PB - KYOTO: PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE RP - NOT IN FILE U3 - TC 51 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0033-068X UR - ISI:000183417300008 L2 - SOLAR-NEUTRINO OBSERVATIONS; DISCRETE GAUGE ANOMALIES; LEPTON MASS HIERARCHY; SUPER-KAMIOKANDE; QUARK; MATRIX; MODEL; OSCILLATIONS; FLUX; CONSERVATION SO - Progress of Theoretical Physics 2003 ;109(5):795-807 8520 UI - 7117 AU - Kucharczyk W AU - Alvarado FLC AD - Lodz Tech Univ, Inst Phys, PL-93005 Lodz, PolandInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoKucharczyk, W, Lodz Tech Univ, Inst Phys, Wolczanska 219, PL-93005 Lodz, Poland TI - Bond polarizability calculations of hyper-Raman scattering in sodium, potassium and rubidium halides AB - Bond polarizability calculations extended for hyper-Raman scattering by the optical LO and TO zone-centre phonons in sodium, potassium and rubidium halides are presented. The effect of the crystal ionicity on both of the independent hyper-Raman tensor components is taken into consideration. Contributions of rotation of crystals bonds and their stretching to hyper-Raman scattering are determined. For LO phonons the electrooptic part of the hyper-Raman tensor is found. The results obtained are compared, when possible, with experimental and theoretical data reported in the literature. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000186160800002 L2 - NONLINEAR-REFRACTIVE-INDEX; ALKALI-HALIDES; OPTICAL SUSCEPTIBILITIES; CHARGE CALCULATION; EMPIRICAL-MODEL; CRYSTALS; DISPERSION; IONICITY SO - Journal of Physics and Chemistry of Solids 2003 ;64(11):2093-2096 8521 UI - 8003 AU - Kudriavtsev Y AU - Villegas A AU - Godines A AU - Asomoza R AU - Usov I AD - CINVESTAV, IPN, Dept Ingn Elect SEES, Mexico City, DF, MexicoUniv N Carolina, Curriculum Appl & Mat Sci, Chapel Hill, NC, USAKudriavtsev, Y, CINVESTAV, IPN, Dept Ingn Elect SEES, Av IPN 2508,Col San Pedro Zacatenco, Mexico City, DF, Mexico TI - Quantitative SIMS analysis of SiC AB - We performed a systematic study of ion-implanted 6H-SiC standards to find the optimal regimes for SIMS analysis. Relative sensitivity factors (RSFs) were acquired for operating conditions typical of practical SIMS applications. The experimental SiC RSFs were compared with those found for silicon:(1) the matrix effect was insignificant in most cases. It was found that the SiO- cluster ion cannot represent correctly the real oxygen distribution in SiC. The physics of the effect is discussed. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0142-2421 UR - ISI:000183910200001 L2 - SIMS;ion implantation;SiC SO - Surface and Interface Analysis 2003 ;35(6):491-495 8522 UI - 8424 AU - Kuhn NJ AU - Bryan RB AU - Navar J AD - Hebrew Univ Jerusalem, Dept Geog, IL-91905 Jerusalem, IsraelUniv Toronto, Soil Eros Lab, Toronto, ON, CanadaUniv Autonoma Nuevo Leon, Fac Ciencias Forestales, Mexico City, DF, MexicoKuhn, NJ, Univ Exeter, Dept Geog, Sch Geog & Archaeol, Armory Bldg,Rennes Dr, Exeter EX4 4RJ, Devon, England TI - Seal formation and interrill erosion on a smectite-rich Kastanozem from NE-Mexico AB - On-site and off-site effects of interrill erosion can be highly significant for river and reservoir sedimentation and can cause serious water contamination. Interrill erosion changes during storms, reflecting the effect of seal formation on soil resistance to interrill erosion. Swelling clay soils appear to be particularly complex in their response to rainfall. Assessment of interrill erosion hazards on such soils requires effective quantitative description of the effects of seal formation on interrill erosion. However, short-term changes of seal properties are not reflected well in current event-based erosion models, leading to poor prediction quality. The objective of this study was to identify the changes in seal condition relevant to temporal change in interrill erosion on a smectite-rich Kastanozem from NE-Mexico. Formation and removal of a non-coherent washed-out layer, consisting of stable aggregates, was the most apparent change in seal condition associated with interrill erosion dynamics. The progressive exposure of a more cohesive washed-in layer resulted in reduced interrill erosion, which is attributed to lower erodibility of the washed-in layer. The results demonstrate that seal formation and interrill erosion dynamics of a freshly tilled Kastanozem are strongly linked. The amount of rainfall required for the removal of the washed-out layer (180 mm) shows that seal formation lasts for a significant part of the rainy season. The changes of interrill erosion caused by seal formation on the Kastanozem are not represented adequately in current methods of erodibility assessment and improving the quality of event-based erosion prediction remains difficult for two reasons. First, relationships between soil properties, seal formation and erosion dynamics are not well understood. Second, the quantitative description of seal property dynamics relevant for interrill erosion is characterized by strong spatial and temporal variability. Therefore, it is likely that even with best modeling efforts, the quality of event-based erosion prediction will be limited by the high uncertainty about erodibility. (C) 2002 Elsevier Science B.V All rights reserved MH - Canada MH - United Kingdom MH - Israel MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Soil Science;Water Resources U5 - J;Article AV - English IS - 0341-8162 UR - ISI:000182948200004 L2 - interrill erosion;sealing;erodibility;swelling clays;MODELING SOIL-EROSION; LABORATORY EXPERIMENTS; AGGREGATE STABILITY; CRUST FORMATION; WATER-QUALITY; LOESS SOILS; SIMULATED RAINFALL; RAINSPLASH EROSION; INFILTRATION-RATE; RAINDROP IMPACT SO - Catena 2003 ;52(2):149-169 8523 UI - 6745 AU - Kumar D AU - McGeown JG AU - Reynoso-Ducoing O AU - Ambrosio JR AU - Fairweather I AD - Queens Univ Belfast, Sch Biol & Biochem, Parasite Proteom & Therapeut Res Grp, Belfast BT9 7BL, Antrim, North IrelandIndian Vet Res Inst, Div Pharmacol & Toxicol, Izatnagar 243122, Uttar Pradesh, IndiaQueens Univ Belfast, Dept Physiol, Smooth Muscle Res Grp, Belfast BT9 7BL, Antrim, North IrelandNatl Autonomous Univ Mexico, Sch Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoFairweather, I, Queens Univ Belfast, Sch Biol & Biochem, Parasite Proteom & Therapeut Res Grp, Belfast BT9 7BL, Antrim, North Ireland TI - Observations on the musculature and isolated muscle fibres of the liver fluke, Fasciola hepatica AB - The liver fluke, Fasciola hepatica relies on a well-developed muscular system, not only for attachment, but for many aspects of its biology. Despite this, little is known about the system beyond the gross organization of the main somatic muscle layers. In the present study, a range of techniques have been applied to F. hepatica in order to understand more about various aspects of muscle organization, biochemistry (in terms of muscle proteins) and identity of isolated muscle fibres. Scanning electron microscopy has provided a direct visualization in situ of the somatic muscle layers and the organization of the muscle fibres within the ventral sucker. The muscle bundles contributing to the main somatic muscle layers are made up of up to 10 individual muscle fibres. Phalloidin staining for actin, in conjunction with confocal microscopy, confirmed the presence of 2 main somatic muscle layers (outer circular, inner longitudinal), beneath which lies a third layer of oblique muscle fibres. The use of propidium iodide in combination with phalloidin staining for actin demonstrated that the cell bodies associated with the 2 main somatic muscle layers are situated beneath the longitudinal muscle layer and are connected to their respective muscle fibres by short cytoplasmic processes. Myosin immunoreactivity was demonstrated in the somatic muscle layers and in the muscle layers surrounding various organ systems within the fluke. Double labelling for actin and myosin confirmed the co-localization of the 2 muscle proteins in the muscle fibres of the ventral sucker. Muscle fibres from the somatic muscle layers and the ventral sucker have been isolated and images obtained with phase-contrast microscopy and scanning electron microscopy. The muscle fibres contain actin and myosin, but lack a nucleus, the connection with the cell body having been broken during the isolation procedure MH - India MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Parasitology U5 - J;Article AV - English IS - 0031-1820 UR - ISI:000187030600006 L2 - Fasciola hepatica;musculature;isolated muscle fibres;actin;myosin;electron microscopy;immuno-cytochemistry;BODY-WALL MUSCULATURE; DIPHYLLOBOTHRIUM-DENDRITICUM CESTODA; ADULT SCHISTOSOMA-MANSONI; TAENIA-SOLIUM PARAMYOSIN; DUGESIA-LUGUBRIS SL; 2 ACTIN GENES; FINE-STRUCTURE; ECHINOCOCCUS-GRANULOSUS; HYMENOLEPIS-MICROSTOMA; MARINE TURBELLARIAN SO - Parasitology 2003 ;127():457-473 8524 UI - 8654 AU - Kumar GA AU - De la Rosa-Cruz E AU - Ueda K AU - Martinez A AU - Barbosa-Garcia O AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Electrocommun, Inst Laser Sci, Tokyo 1828585, JapanDe la Rosa-Cruz, E, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - Enhancement of optical properties of Nd3+ doped fluorophosphate glasses by alkali and alkaline earth metal co-doping AB - Fluorophosphate glasses doped with trivalent Nd and using Li and Ba as network modifier cations are spectroscopically analyzed to understand the effects of these cations on the radiative and non-radiative process. The radiative properties of Nd3+ such as radiative transition probabilities, radiative decay times and stimulated emission cross-sections of the transitions from the F-4(3/2) level, and their dependence on network modifiers and active ion concentration are analyzed using the Judd-Ofelt theory. Results show that, eventhough stimulated emission cross-section is maximum in Li based glass, fluorescence quenching is higher, however it is considerably reduced by the presence of Ba. It is found that, Ba and LiBa based glasses yield higher quantum efficiency showing that Ba reduces the fluorescence quenching properties of the matrix. The stimulated emission cross-section of the emission band at 1.055 mum is higher than that of commercial laser glasses. On the other hand, quantitative estimation of the non-radiative processes such as multiphonon relaxation and quenching by water content shows that water content is far below the critical level of optimum laser performance. All these factors pertain to the fact that these Nd3+ doped fluorophosphate glasses can be effectively used for high power lasers in the 0.8 and 1.055 mum regions. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000182288400004 L2 - spectroscopic properties;Judd-Ofelt theory;phosphate glasses;FLUORESCENCE-SPECTRA; PARAMETERS; IONS SO - Optical Materials 2003 ;22(3):201-213 8525 UI - 9493 AU - Kumar GA AU - De la Rosa-Cruz E AU - Martinez A AU - Unnikrishnan NV AU - Ueda K AD - Univ Electrocommun, Inst Laser Sci, Tokyo 1828585, JapanCtr Invest & Opt AC, Leon 37160, MexicoMahatma Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, IndiaKumar, GA, Univ Electrocommun, Inst Laser Sci, Tokyo 1828585, Japan TI - Influence of borate content on the radiative properties of Nd3+ ions in fluorophosphate glasses AB - Spectroscopic properties of Nd3+ in barium fluoroborophosphate glassy matrix have been analyzed by fitting the experimental data with the standard Judd-Ofelt theory. Various spectroscopic parameters viz. radiative transition probabilities, radiative decay time, fluorescence branching ratios, electric dipole line strengths, stimulated emission cross-sections and optical gain of the principal fluorescence transitions from the F-4(3/2) metastable level are obtained. Results show that addition of borate content to the fluorophosphate matrix will reduce the fluorescence spectral properties of Nd3+. However, the radiative properties of the present fluoroborophosphate glassy matrix are found to be well improved over that of pure borate and phosphate matrix and is attributed to the influence of fluorine content in the glassy matrix. The changes in the position and the Judd-Ofelt intensity parameters are correlated with the structural changes in the host glass matrix. The shift of the hypersensitive band shows that the covalency of the rare earth to oxygen bond increases with the increase of Na2O content. This covalency effect and the formation of the BO4 groups with the addition of Na2O content are responsible for the increase in the radiative properties of the present system. Quantitative estimation of the non-radiative processes such as multiphonon relaxation and quenching by water content was carried out and the results show that both are below the critical level for optimum laser performance. (C) 2002 Elsevier Science Ltd. All rights reserved MH - India MH - Japan MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000180188100010 L2 - chalcogenides;elements;glasses;FLUORIDE GLASS; SPECTRA SO - Journal of Physics and Chemistry of Solids 2003 ;64(1):69-76 8526 UI - 6869 AU - Kumar MSN AU - Fernandes AJL AU - Hunter TR AU - Davis CJ AU - Kurtz S AD - Univ Porto, Ctr Astrofis, P-7150462 Oporto, PortugalInst Super Maia, P-4475690 Avioso S Pedro, PortugalHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAJoint Astron Ctr, Hilo, HI 96720, USAUNAM, Inst Astron, Morelia 58090, Michoacan, MexicoKumar, MSN, Univ Porto, Ctr Astrofis, Rua Estrelas, P-7150462 Oporto, Portugal TI - A massive disk/envelope in shocked H2 emission around an UCHII region AB - A multi-wavelength study of IRAS 07427-2400 in line and continuum emission was conducted to investigate the nature of a H-2 v=1-0 S(1) line emitting feature around this ultra-compact HII region. High resolution 3.6 cm continuum observations from the Very Large Array and 350 mum continuum observations from the Caltech Submillimeter Observatory, combined with archival far-infrared data of IRAS 07427-2400 show a flux density distribution indicating a luminous (L=5.6x10(4) L-circle dot) point source associated with an ultra-compact HII region. A Grey body model fit to the flux density distribution yields a dust emissivity index (betasimilar to0.66) indicative of a circumstellar disk/envelope. Our (CO)-O-18 map shows a dense core centered on the continuum source, with the major axis roughly aligned with the H2 feature. A position-velocity diagram of the (CO)-O-18 core obtained along the major axis shows rotation with a velocity gradient of similar to0.1 km s(-1) arcsec(-1). New CO J=3-2 maps of the region are presented which reveal a massive molecular outflow from the IRAS source. We argue that the H-2 feature arises in a disk/envelope around IRAS 07427-2400 and not in an outflow. We present a near-infrared HK band spectrum of the H-2 features that shows several ro-vibrational emission lines of H-2 and [FeII]. Analysis of the line ratios indicates that the line emission is shock-excited and not due to fluorescence. We estimate an excitation temperature of similar to1600 K and an average extinction of A(v)similar to11 mag to the H-2 feature. The line fluxes yield a mass accretion rate of (M)over dot similar to2.6+/-0.9x10(-2) M-circle dot yr(-1) and a lifetime of similar to5360+/-1200 yr resulting in a disk/envelope mass of 140+/-50 M-circle dot. The resulting Jeans Mass of 2420 M-circle dot indicates that the disk/ envelope will not undergo fragmentation. IRAS 07427-2400 represents one of the most massive YSOs known to date forming by means of accretion MH - Mexico|Michoacan MH - Portugal MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000186800600018 L2 - stars : formation;accretion : accretion disks;interstellar medium : jets and outflows;ISM : HII regions;YOUNG STELLAR OBJECTS; T-TAURI STARS; MOLECULAR CLOUDS; CIRCUMSTELLAR DISKS; BIPOLAR OUTFLOW; INFRARED-SPECTROSCOPY; H-2; HYDROGEN; SYSTEM; SEARCH SO - Astronomy & Astrophysics 2003 ;412(1):175-184 8527 UI - 9141 AU - Kun SY AU - Benet L AU - Chadderton LT AU - Greiner W AU - Haas F AD - Australian Natl Univ, IAS, RSPhysSE, Dept Theoret Phys, Canberra, ACT 0200, AustraliaNatl Autonomous Univ Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoAustralian Natl Univ, IAS, RSPhysSE, Atom Lab, Canberra, ACT 0200, AustraliaAustralian Natl Univ, IAS, RSPhysSE, Mol Phys Lab, Canberra, ACT 0200, AustraliaUniv Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, GermanyCNRS, IN2P3, Inst Rech Subatom, F-67037 Strasbourg 2, FranceUniv Strasbourg 1, F-67037 Strasbourg 2, FranceKun, SY, Australian Natl Univ, IAS, RSPhysSE, Dept Theoret Phys, Canberra, ACT 0200, Australia TI - Macroscopic quantum superpositions in highly excited strongly interacting many-body systems AB - We demonstrate a breakdown in the macroscopic (classical-like) dynamics of wave-packets in complex microscopic and mesoscopic collisions. This breakdown manifests itself in coherent superpositions of the rotating clockwise and anticlockwise wave-packets in the regime of strongly overlapping many-body resonances of the highly-excited intermediate complex. These superpositions involve similar to10(4) many-body configurations so that their internal interactive complexity dramatically exceeds all of those previously discussed and experimentally realized. The interference fringes persist over a time-interval much longer than the energy relaxation-redistribution time due to the anomalously slow phase randomization (dephasing). Experimental verification of the effect is proposed MH - Australia MH - France MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000180943300005 L2 - INVARIANT-MANIFOLDS; DECOHERENCE; MOLECULES; STATES SO - Physical Review C 2003 ;67(1): 8528 UI - 7272 AU - Kunchur MN AU - Wu C AU - Arcos DH AU - Ivlev BI AU - Choi EM AU - Kim KHP AU - Kang WN AU - Lee SI AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAPohang Univ Sci & Technol, Ctr Superconduct, Pohang 790784, South KoreaPohang Univ Sci & Technol, Dept Phys, Pohang 790784, South KoreaUniv Autonoma San Luis Potosi, Inst Fis, SLP 78000, MexicoKunchur, MN, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA TI - Critical flux pinning and enhanced upper critical field in magnesium diboride films AB - We have conducted pulsed transport measurements on c-axis-oriented magnesium diboride films over the entire relevant ranges of magnetic field 0less than or similar toHless than or similar toH(c2) (where H-c2 is the upper critical field) and current density 0less than or similar tojless than or similar toj(d) (where j(d)similar to10(7) A/cm(2) is the depairing current density). The intrinsic disorder of the films combined with the large coherence length and three dimensionality, compared to cuprate superconductors, results in a sixfold enhancement of H-c2 (to 17+/-3 T) and raises the depinning current density j(c) to within an order of magnitude of j(d). The current-voltage response has an unusually steep nonlinear shape at all fields, resulting from a combination of depinning and pair breaking, and has no trace of an Ohmic free-flux-flow regime MH - Mexico|San Luis Potosi MH - South Korea MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000185719000014 L2 - HIGH-CURRENT DENSITIES; THIN-FILMS; YBA2CU3O7-DELTA; TEMPERATURE; TRANSITION SO - Physical Review B 2003 ;68(10): 8529 UI - 8309 AU - Kuraszkiewicz JK AU - Wilkes BJ AU - Hooper EJ AU - Mcleod KK AU - Wood K AU - Bjorkman J AU - Delain KM AU - Hughes DH AU - Elvis MS AU - Impey CD AU - Lonsdale CJ AU - Malkan MA AU - McDowell JC AU - Whitney B AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Texas, Dept Astron, Austin, TX 78712, USAWellesley Coll, Dept Astron, Wellesley, MA 02481, USAUniv St Andrews, Dept Phys & Astron, St Andrews, Fife, ScotlandUniv Toledo, Dept Phys & Astron, Ritter Observ, Toledo, OH 43606, USAUniv Minnesota, Dept Astron, Minneapolis, MN 55455, USAInst Natl Astrofis Opt & Elect, Mexico City, DF, MexicoUniv Arizona, Steward Observ, Tucson, AZ 85721, USACALTECH, IPAC, Pasadena, CA 91125, USAUniv Calif Los Angeles, Dept Astron, Los Angeles, CA 90095, USASpace Sci Inst, Boulder, CO 80303, USAKuraszkiewicz, JK, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - The far-infrared spectral energy distributions of X-ray - Selected active galaxies AB - Hard X-ray selection is, arguably, the optimal method for de. ning a representative sample of active galactic nuclei (AGNs). Hard X-rays are unbiased by the effects of obscuration and reprocessing along the line of sight intrinsic/external to the AGN, which result in unknown fractions of the population being missed from traditional optical/soft X-ray samples. We present the far-infrared (far-IR) observations of 21 hard X-ray-selected AGNs from the HEAO 1 A2 sample observed with Infrared Space Observatory (ISO). We characterize the far-IR continua of these X-ray-selected AGNs and compare them with those of various radio and optically selected AGN samples and with models for an AGN-heated, dusty disk. The X-ray selected AGNs show broad, warm IR continua covering a wide temperature range (similar to20-1000 K in a thermal emission scenario). Where a far-IR turnover is clearly observed, the slopes are less than 2.5 in all but three cases so that nonthermal emission remains a possibility, although the presence of cooler dust resulting in a turnover at wavelengths longward of the ISO range is considered more likely. The sample also shows a wider range of optical/UV shapes than the optical/radio-selected samples, extending to redder near-IR colors. The bluer objects are type 1 Seyfert galaxies, while the redder AGNs are mostly intermediate or type 2 Seyfert galaxies. This is consistent with a modified unification model in which obscuration increases as we move from a face-on toward a more edge-on line of sight. However, this relation does not extend to the mid-infrared as the 25/60 mum ratios are similar in Seyfert galaxies with differing type and optical/UV reddening. The resulting limits on the column density of obscuring material through which we are viewing the redder AGNs (N-H similar to 10(22) cm(-2)) are inconsistent with standard optically thick torus models (NH similar to 1024 cm(-2)) and simple unification models. Instead our results support more complex models in which the amount of obscuring material increases with viewing angle and may be clumpy. Such a scenario, already suggested by differing optical/near-IR spectroscopic and X-ray AGN classifications, allows for different amounts of obscuration of the continuum emission in different wave bands and of the broad emission line region, which, in turn, results in a mixture of behaviors for AGNs with similar optical emission-line classifications. The resulting decrease in the optical depth of the obscuring material also allows the AGN to heat more dust at larger radial distances. We show that an AGN-heated, flared, dusty disk with mass of similar to10(9) M. and size of approximately a few hundred parsecs is able to generate optical-far-IR spectral energy distributions (SEDs) that reproduce the wide range of SEDs present in our sample with no need for an additional starburst component to generate the long-wavelength, cooler part of the IR continuum MH - USA MH - Mexico|Distrito Federal MH - United Kingdom PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-637X UR - ISI:000183278700014 L2 - galaxies : active;galaxies : nuclei;infrared : galaxies;X-rays : galaxies;RADIO-QUIET QUASARS; GALACTIC NUCLEI; SEYFERT-GALAXIES; DUST EMISSION; HOST GALAXIES; STATISTICAL-METHODS; IONIZING CONTINUUM; ASTRONOMICAL DATA; OBSCURING TORI; STEEP-SPECTRUM SO - Astrophysical Journal 2003 ;590(1):128-148 8530 UI - 7734 AU - Kuryatkov V AU - Zhu K AU - Borisov B AU - Chandolu A AU - Gherasoiu I AU - Kipshidze G AU - Chu SNG AU - Holtz M AU - Kudryavtsev Y AU - Asomoza R AU - Nikishin S AU - Temkin H AD - Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409, USAAgere Syst, Murray Hill, NJ 07974, USATexas Tech Univ, Dept Phys, Lubbock, TX 79409, USATexas Tech Univ, Nano Tech Ctr, Lubbock, TX 79409, USACINVESTAV, Dept Elect Engn, SIMS Lab SEES, Mexico City 07300, DF, MexicoNikishin, S, Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409 USA TI - Electrical properties of p-n junctions based on superlattices of AlN/AlGa(In)N AB - Measurements of acceptor activation energy in p-n junctions based on superlattices of AlN (1.25 nm thick) and Al0.08Ga0.92(In)N (0.5 nm thick), with the average AlN content greater than 0.6, are reported. Structural characteristics of superlattices were determined using transmission electron microscopy and x-ray diffraction. p-n junctions in mesa-etched diodes exhibit low leakage current densities of 3x10(-10) A/cm(2) at near zero bias. Acceptor activation energy of 207+/-10 meV, obtained from the temperature dependence of the forward current, is very similar to that of uniform alloy of Al0.08Ga0.92N that constitutes the well material. The acceptor activation energy thus appears controlled by the well material and remains low despite high average AlN content and large band gap. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000184748600013 L2 - LIGHT-EMITTING-DIODES; MULTIPLE-QUANTUM WELLS; MOLECULAR-BEAM EPITAXY; VAPOR-PHASE EPITAXY; GAN; MG; OPERATION; SI(111); SEMICONDUCTORS; EFFICIENT SO - Applied Physics Letters 2003 ;83(7):1319-1321 8531 UI - 9984 AU - Kuzmenkov LS AU - Maximov SG AU - Zavala JLG AD - Moscow MV Lomonosov State Univ, Moscow 119899, RussiaInst Tecnol Morelia, Morelia, Michoacan, MexicoKuzmenkov, LS, Moscow MV Lomonosov State Univ, Moscow 119899, Russia TI - On the asymptotic solutions of the coupled quasiparticle-oscillator system AB - A coupled quasiparticle-oscillator system is considered for an arbitrary number of excitons. The exciton dynamics is described in terms of the second quantization (i.e. by means the bosonic operators). As a consequence a radius of a Bloch sphere is obtained different to the previous results. Some integrals of motion are obtained that allowed to reduce the system of equations of motion to a single nonlinear ordinary differential equation of the fourth order. This equation contains the energy of the system as a parameter. The fixed points are found as a functions of the energy of the system, and its stability properties are investigated. It is demonstrated that a bifurcation is presented for the energies H < -1/2p. An asymptotic quasiclassical solution around fixed point for the case H > -1/2p is obtained. The solutions around other stable fixed points can be obtained analogously. The expression for the evolution operator of the quasiparticle-oscillator system is obtained as a functional on the classical solutions. (C) 2002 Published by Elsevier Science Ltd MH - Mexico|Michoacan MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000178893500001 L2 - QUASI-PARTICLE; DYNAMICS; DIMER SO - Chaos Solitons & Fractals 2003 ;15(4):597-610 8532 UI - 8725 AU - Kwon O AU - Georgellis D AU - Lin ECC AD - Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoKorea Res Inst Biosci & Biotechnol, Lab Met Engn, Yusong Gu, Taejon 305333, South KoreaLin, ECC, Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115 USA TI - Rotational on-off switching of a hybrid membrane sensor kinase Tar-ArcB in Escherichia coli AB - Signal transduction in biological systems typically involves receptor proteins that possess an extracytosolic sensory domain connected to a cytosolic catalytic domain. Relatively little is known about the mechanism by which the signal is transmitted from the sensory site to the catalytic site. At least in the case of Tar (methyl-accepting chemotaxis protein for sensing aspartate) of Escherichia coli, vertical piston-like displacements of one transmembrane segment relative to the other within the monomer induced by ligand binding has been shown to modulate the catalytic activity of the cytosolic domain. The ArcB sensor kinase of E. coli is a transmembrane protein without a significant periplasmic domain. Here, we explore how the signal is conveyed to the catalytic site by analyzing the property of various Tar-ArcB hybrids. Our results suggest that, in contrast to the piston-like displacement that operates in Tar, the catalytic activity of ArcB is set by altering the orientation of the cytosolic domain of one monomer relative to the other in the homodimer. Thus, ArcB represents a distinct family of membrane receptor proteins whose catalytic activity is determined by rotational movements of the cytosolic domain MH - USA MH - Mexico|Distrito Federal MH - South Korea PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000182189500077 L2 - DISULFIDE CROSS-LINKING; SIGNAL-TRANSDUCTION SYSTEM; ASPARTATE RECEPTOR; 2-COMPONENT SYSTEM; BACTERIAL CHEMOTAXIS; ANAEROBIC REPRESSION; AEROBIC PATHWAYS; GENE-EXPRESSION; IN-VITRO; PROTEIN SO - Journal of Biological Chemistry 2003 ;278(15):13192-13195 8533 UI - 7470 AU - Labisbal E AU - Haslow KD AU - Sousa-Pedrares A AU - Valdes-Martinez J AU - Hernandez-Ortega S AU - West DX AD - Univ Santiago de Compostela, Dept Quim Inorgan, Santiago De Compostela 15782, SpainIllinois State Univ, Dept Chem, Normal, IL 61790, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoLabisbal, E, Univ Santiago de Compostela, Dept Quim Inorgan, Santiago De Compostela 15782, Spain TI - Copper(II) and nickel(II) complexes of 5-methyl-2-hydroxyacetophenone N(4)-substituted thiosemicarbazones AB - Mononuclear and binuclear copper(II) and nickel(II) complexes with 5-methyl-2-hydroxyacetophenone N(4)-substituted thiosemicarbazones have been prepared and characterized. IR and H-1 NMR spectra of the N(4)-substituted thiosemicarbazones and their metal complexes, as well as ESR spectra of the mononuclear copper(II) complexes, have been obtained. The crystal structures of 5-methyl-2-hydroxyacetophenone N(4)-dimethylthiosemicarbazone and a representative binuclear copper(II) complex have been acquired, and their structural features are compared to related thiosemicarbazones and previously reported binuclear copper(II) thiosemicarbazone complexes. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000185358000009 L2 - hydroxyacetophenone;thiosemicarbazone;copper;nickel;crystal structures;metal(II) complexes;2-HYDROXYACETOPHENONE N-4-SUBSTITUTED THIOSEMICARBAZONES; CRYSTAL-STRUCTURE; PALLADIUM(II) COMPLEXES; COBALT(III) COMPLEXES; TRIPALLADIUM COMPLEX; METAL-COMPLEXES; LIGANDS; N(4)-DIMETHYLTHIOSEMICARBAZONE; N(4)-METHYLTHIOSEMICARBAZONE; ESR SO - Polyhedron 2003 ;22(20):2831-2837 8534 UI - 5900 AU - Labrie L AU - Roque A AU - Gomez-Gil B AU - Turnbull JF AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandCtr Invest Alimentac & Desarrollo, Mazatlan, MexicoRoque, A, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - Effect of methyl parathion on the susceptibility of shrimp Litopenaeus vannamei to experimental vibriosis AB - Following increasing calls for environmental safety over the past 2 decades, persistent pesticides are being replaced by more rapidly degradable products. However, even these pesticides can affect non-target species, and may be associated with slow growth and increased susceptibility to viral and bacterial infections. In this study, juvenile white shrimp Litopenaeus vannamei (also named Penaeus vannamei) were challenged by intramuscular injection with Vibrio parahaemolyticus after 4 d prior exposure to methyl parathion in feed pellets at 0.080 mug g(-1). The bacterial injection control group consisted of shrimp fed pellets containing the methyl parathion- carrier solvent acetonitrile. Three additional control groups comprised 2 sterile saline-injection groups fed pellets containing methyl parathion or acetonitrile prior to injection, and 1 uninjected group fed normal pellets. Cumulative mortalities were recorded on the 4th and 8th days, and the presence of histological lesions was recorded on the 8th day. Cumulative mortalities were significantly higher in the group exposed to methyl parathion and bacteria on Day 8. Histological lesions, typical of vibriosis, were significantly associated with the injection of V. parahaemolyticus. The study provides strong experimental evidence that prior exposure to methyl parathion can increase the severity of Vibrio infections MH - Mexico|Sinaloa MH - United Kingdom PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Veterinary Sciences U5 - J;Article AV - English IS - 0177-5103 UR - ISI:000220379300012 L2 - shrimp;vibriosis;methyl parathion;pesticide;PENAEUS-SEMISULCATUS CRUSTACEA; ACETYLCHOLINESTERASE ACTIVITY; PESTICIDES; POLLUTANTS; AQUACULTURE; DECAPODA; MONODON; WATER; VIRUS; CYCLE SO - Diseases of Aquatic Organisms 2003 ;57(3):265-270 8535 UI - 7320 AU - Lacasse Y AU - Selman M AU - Costabel U AU - Dalphin JC AU - Ando M AU - Morell F AU - Erkinjuntti-Pekkanen R AU - Muller N AU - Colby TV AU - Schuyler M AU - Cormier Y AD - Univ Laval, Hop Laval, Ctr Pneumol, St Foy, PQ G1V 4G5, CanadaUniv British Columbia, Vancouver, BC V5Z 1M9, CanadaInst Nacl Enfermedades Resp, Mexico City, DF, MexicoRuhrlandklinik, Essen, GermanyCHU Besancon, F-25030 Besancon, FranceKumamoto Univ, Sch Med, Kumamoto 860, JapanUniv Barcelona, Hosp Vall Hebron, Barcelona, SpainKuopio Univ Hosp, SF-70210 Kuopio, FinlandMayo Clin Scottsdale, Scottsdale, AZ, USAUniv New Mexico, Sch Med, Albuquerque, NM 87131, USALacasse, Y, Univ Laval, Hop Laval, Ctr Pneumol, 2725 Chemin St Foy, St Foy, PQ G1V 4G5, Canada TI - Clinical diagnosis of hypersensitivity pneumonitis AB - The diagnosis of hypersensitivity pneumonitis (HP) is difficult and often relies on histopathology. Our objective was to identify diagnostic criteria and to develop a clinical prediction rule for this disease. Consecutive patients presenting a condition for which H P was considered in the differential diagnosis underwent a program of simple standardized diagnostic procedures. High-resolution computed tomography scan and bronchoalveolar lavage (BAL) defined the presence or absence of HP. Patients underwent surgical lung biopsy when the computed tomography scan, BAL, and other diagnostic procedures failed to yield a diagnosis. A cohort of 400 patients (1116 with HP, 284 control subjects) provided data for the rule derivation. Six significant predictors of HP were identified: (1) exposure to a known offending antigen, (2) positive precipitating antibodies to the offending antigen, (3) recurrent episodes of symptoms, (4) inspiratory crackles on physical examination, (5) symptoms occurring 4 to 8 hours after exposure, (6) and weight loss. The area under the receiver operating characteristic curve was 0.93 (95% confidence interval: 0.90-0.95). The rule retained its accuracy when validated in a separate cohort of 261 patients. The diagnosis of HP can often be made or rejected with confidence, especially in areas of high or low prevalence, respectively, without BAL or biopsy MH - Canada MH - Finland MH - France MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - Spain MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 51 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000185881600008 L2 - lung diseases;interstitial;decision support techniques;probability;FARMERS LUNG-DISEASE; IDIOPATHIC PULMONARY FIBROSIS; EXTRINSIC ALLERGIC ALVEOLITIS; DAIRY FARMERS; BRONCHOALVEOLAR LAVAGE; MEDICAL LITERATURE; USERS GUIDES; DECISION; RULES; CLASSIFICATION SO - American Journal of Respiratory and Critical Care Medicine 2003 ;168(8):952-958 8536 UI - 7549 AU - Ladah LB AD - CICESE, Dept Ecol, Div Oceanol, Ensenada 22800, Baja California, MexicoLadah, LB, CICESE, Div Oceanol, Dept Ecol, POB 434844, San Diego, CA 92143 USA TI - The shoaling of nutrient-enriched subsurface waters as a mechanism to sustain primary productivity off Central Baja California during El Nino winters AB - Using CalCOFI data for coastal shallow stations (above 100 to depth), higher than expected nitrate concentrations were detected in near-surface high-temperature waters off of Central Baja California during some El Nino winters. Though recent data are not available for Central Baja California, past El Nino data, though limited, showed nitrate concentrations above 16 muM at temperatures above 16 degreesC, and nitrate concentrations between 1 and 2 muM at 19 degreesC, while the previously established relationship of temperature and nitrate for California Current waters predicts nitrate depletion above 14 or 15 C. The anomalous, high temperature-high nitrate enrichment events documented in Central Baja California were detected as shallow as 9 m and as deep as 73 m, were associated with low-oxygen (between 2 and 4 ml/l) and high-salinity (between 33.8 and 34.3 psu) waters, and occurred during the winter months of an El Nino year. Using recent data for San Diego, CA, similar but weaker enrichment events were detected for the El Nino winter of 1997-1998. The periodic shoaling of a subsurface subtropical water mass of high temperature, high salinity, low oxygen and high nutrients during some El Nino winters is proposed to cause periodic enrichment and to maintain productivity during warming events in this area. Enrichment events were not detected off Ensenada, in Northern Baja California, possibly due to the amplification of the onshore flow during El Nino there, or due to the Ensenada front. The proposed mechanism of periodic enrichment of nutrient-depleted surface waters during some El Nino winters by subsurface waters from the California Undercurrent may explain the following: (1) survival of giant kelp forests at their southern limit in Central Baja California documented during past El Nino events in warm waters, (2) the rapid recovery and high carrying capacity of giant kelp documented after the mass disappearance during El Nino 1997-1998, and (3) the increase in the extent of mesotrophic chlorophyll detected in the area during the 1997-1998 and 1982-1983 El Nino events. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0924-7963 UR - ISI:000185158400006 L2 - Baja California;Mexico;El Nino;enrichment events;ENSO;kelp forests;nutrient dynamics;temperature-nitrate relationship;EQUATORIAL PACIFIC-OCEAN; SOUTHERN-CALIFORNIA; GIANT-KELP; MACROCYSTIS-PYRIFERA; CIRCULATION; VARIABILITY; ECOSYSTEM; EVOLUTION; GROWTH; OREGON SO - Journal of Marine Systems 2003 ;42(3-4):145-152 8537 UI - 8988 AU - Lado C AU - Estrada-Torres A AU - Stephenson SL AU - de Basanta DW AU - Schnittler M AD - CSIC, Real Jardin Bot Madrid, Madrid 28014, SpainUniv Autonoma Tlaxcala, Ctr Invest Ciencias Biol, Tlaxcala 90000, MexicoFairmont State Coll, Dept Biol, Fairmont, WV 26554, USAAmer Sch Madrid, Madrid 28080, SpainUniv Greifswald, Inst Bot, D-17487 Greifswald, GermanyLado, C, CSIC, Real Jardin Bot Madrid, Plaza Murillo 2, Madrid 28014, Spain TI - Biodiversity assessment of myxomycetes from two tropical forest reserves in Mexico AB - This paper presents the results of surveys carried out in two tropical forest reserves, El Eden (Quintana Roo) and Los Tuxtlas (Veracruz), in Mexico. A total of 857 collections of myxomycetes yielded 99 different taxa. One of these (Diderma yucatanensis) is described as a new species, two (Licea poculiformis and Stemonitis lignicola) are new records for the Neotropics, and 14 species and 2 varieties are new records for Mexico. Our data support the presence of a distinct assemblage of myxomycetes in tropical regions and substantiate the value of using the moist chamber technique as a complement to fieldwork in biodiversity studies. These same data also suggest that a number of different niches are exploited by myxomycetes in the tropics MH - Germany MH - Mexico|Tlaxcala MH - Spain MH - USA PB - YUNNAN: FUNGAL DIVERSITY PRESS RP - NOT IN FILE U3 - TC 7 U4 - Mycology U5 - J;Article AV - English IS - 1560-2745 UR - ISI:000181503800007 L2 - distribution;Mycetozoans;new species;plasmodial slime moulds;SEM;species inventory;taxonomy;STEMONITALES; ECOLOGY SO - Fungal Diversity 2003 ;12():67-110 8538 UI - 7326 AU - Lafuente MT AU - Zacarias L AU - Martinez-Tellez MA AU - Sanchez-Ballesta MT AU - Granell A AD - CSIC, IATA, Valencia 46100, SpainCIAD, Ctr Invest & Alimentac Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Politecn Valencia, CSIC, IBMCP, Valencia, SpainLafuente, MT, CSIC, IATA, Apdo Correos 73, Valencia 46100, Spain TI - Phenylalanine ammonia-lyase and ethylene in relation to chilling injury as affected by fruit age in citrus AB - Fruit of many citrus cultivars become injured when exposed to low, non-freezing temperatures. In this study we have determined changes in ethylene production and phenylalanine ammonia-lyase (PAL; EC 4.3.1.5) in fruit of three citrus cultivars, 'Fortune' mandarins, and 'Navelina' and 'Valencia' late oranges, with different tolerance to chilling injury (CI) and demonstrated the influence of fruit physiological stage on those stress responses. We have shown that the increase in ethylene production and PAL are cold-induced responses which are only stimulated in fruit of citrus cultivars showing chilling damage and that both responses may occur concomitantly with the development of chilling symptoms. However, the magnitude of these responses was not indicative of the degree of tolerance of a specific cultivar to chilling. The influence of fruit age on both responses was evaluated in the most ('Navelina') and the least ('Fortune') chilling tolerant cultivars. Chilling damage was not developed in 'Navelina' fruit at any physiological stage, but our results in 'Fortune' mandarins, which always developed chilling symptoms, indicated that the induction of PAL in response to chilling was dependent on the fruit physiological stage. Interestingly, increases in both PAL mRNA and activity were barely affected by cold stress in the youngest 'Fortune' fruit harvested in December in spite of its noticeable CL For a similar Cl index, the older the fruit, the higher was the shift in the levels of PAL transcript and in PAL activity in response to cold. In contrast, the cold-induced ethylene production was little affected by the physiological stage of the fruit. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Sonora MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000185712400008 L2 - citrus fruit;chilling tolerance;ethylene;low temperature;phenylalanine ammonia-lyase;maturity;FORTUNE MANDARIN FRUIT; PHENYLPROPANOID METABOLISM; PAL ACTIVITY; TEMPERATURE; BIOSYNTHESIS; INDUCTION; LETTUCE; SUSCEPTIBILITY; ACCUMULATION; INVOLVEMENT SO - Postharvest Biology and Technology 2003 ;29(3):309-318 8539 UI - 6396 AU - Lage J AU - Skovmand B AU - Andersen SB AD - CIMMYT, Mexico City 06600, DF, MexicoRoyal Vet & Agr Univ, DK-1871 Frederiksberg C, DenmarkLage, J, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Characterization of greenbug (Homoptera : Aphididae) resistance in synthetic hexaploid wheats AB - Twelve greenbug (Schizaphis graminum (Rondani)) biotype E-resistant synthetic hexaploid wheats synthesized by crossing Triticum dicoccum Schrank. and Aegilops tauschii (Coss.) Schmal. were evaluated for the three known insect resistance categories, including antibiosis, antixenosis, and tolerance. Different methods were evaluated for calculating antibiosis and tolerance. Calculating intrinsic rate of population increase and measuring leaf chlorophyll content with a SPAD chlorophyll meter proved to be time- and labor-efficient for antibiosis and tolerance determination, respectively. The resistance in all synthetic hexaploids proved to be the result of a combination of antibiosis, antixenosis, and tolerance, which makes them valuable sources of greenbug resistance. To assist plant breeders in selecting the best germplasm for greenbug resistance, a plant resistance index was created that revealed differences among the synthetic hexaploid wheats MH - Denmark MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000188467500039 L2 - Schizaphis graminum;synthetic hexaploid wheat;antibiosis;antixenosis;tolerance;X T-TAUSCHII; AEGILOPS-SQUARROSA; TRITICUM-TAUSCHII; GERMPLASM; REGISTRATION; INHERITANCE; SUPPRESSION; INCREASE; BIOTYPES; RUST SO - Journal of Economic Entomology 2003 ;96(6):1922-1928 8540 UI - 6929 AU - Lage J AU - Warburton ML AU - Crossa J AU - Skovmand B AU - Andersen SB AD - CIMMYT, Mexico City 06600, DF, MexicoRoyal Vet & Agr Univ, DK-1870 Frederiksberg C, DenmarkLage, J, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Assessment of genetic diversity in synthetic hexaploid wheats and their Triticum dicoccum and Aegilops tauschii parents using AFLPs and agronomic traits AB - Synthetic hexaploid wheats are of interest to wheat breeding programs, especially for introducing new genes that confer resistance to biotic and abiotic stresses. A group of 54 synthetic hexaploid wheats derived from crosses between emmer wheat (Triticum dicoccum, source of the A and B genomes) and goat grass (Aegilops tauschii, D genome donor) were investigated for genetic diversity. Using the AFLP technique, dendrograms revealed clear grouping according to geographical origin for the T. dicoccum parents but no clear groups for the Ae. tauschii parents. The geographical clustering of the T. dicoccum parents was also reflected in the dendrogram of their derived synthetic hexaploids. Diversity of the T. dicoccum parents and their derived synthetic hexaploids was further evaluated by measuring 18 morphological and agronomic traits on the plants. Clustering based on morphological and agronomic data also reflected geographical origin. However, comparison of genetic distances obtained from AFLP and agronomic data showed no correlation between the two diversity measurements. Nevertheless, similarities among major clusters with the two systems could be identified. Based on percentage of polymorphic markers, the synthetic hexaploids had a considerably higher level of AFLP diversity (39%) than normally observed in cultivated hexaploid wheat (12-21%). This suggests that synthetic hexaploid wheats can be used to introduce new genetic diversity into the bread wheat gene pool MH - Denmark MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000186733600008 L2 - Aegilops tauschii;AFLPs;agronomic traits;genetic diversity;synthetic hexaploid wheat;Triticum dicoccum;X T-TAUSCHII; PREDICTING PROGENY VARIANCE; MORPHOLOGICAL TRAITS; LENGTH POLYMORPHISMS; PACIFIC-NORTHWEST; MOLECULAR MARKERS; SPRING WHEAT; STRIPE RUST; RESISTANCE; TURGIDUM SO - Euphytica 2003 ;134(3):305-317 8541 UI - 9159 AU - Lage J AU - Skovmand B AU - Andersen SB AD - CIMMYT, Mexico City 06600, DF, MexicoRoyal Vet & Agr Univ, DK-1871 Frederiksberg C, DenmarkLage, J, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Expression and suppression of resistance to greenbug (Homoptera : Aphididae) in synthetic hexaploid wheats derived from Triticum dicoccum x Aegilops tauschii crosses AB - Fifty-eight synthetic hexaploid wheats, developed by crossing Triticum dicoccum Schrank. and Aegilops tauschii (Coss.) Schmal., were evaluated at the seedling stage, together with their parents, for resistance to greenbug (Schizaphis graminum Rondani) under greenhouse conditions. Seedlings of different synthetic bexaploids showed large phenotypic differences for resistance. All the T dicoccum parents were susceptible, while high levels of resistance were observed in some of the Ae. tanschii parents. Of the synthetic hexaploids derived from resistant Ae. tauschii parents, a high proportion (76%) showed levels of resistance to the greenbug biotype used that were comparable to those of the resistant parent. While there were clear indications of the presence of suppressor genes for greenbug resistance in the A and/ or B genomes of T. dicoccum in some synthetics, positive epistatic interaction was also found in synthetic hexaploids with higher levels of resistance than that of either parent. Resistance front different Ae. tauschii accessions was expressed differently when crossed with the same T dicoccum, indicating diversity among the resistance genes present in the test synthetic hexaploid wheats. Based on resistance reactions, the genes conferring greenbug resistance in these synthetic hexaploids are probably different from resistance genes previously transferred to wheat from Ae. tauschii MH - Denmark MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000180967000027 L2 - Schizaphis graminum;synthetic hexaploid wheat;resistance screening;genetic interaction;T-TAUSCHII; GERMPLASM LINES; STRIPE RUST; SQUARROSA; INHERITANCE; CULTIVARS SO - Journal of Economic Entomology 2003 ;96(1):202-206 8542 UI - 8270 AU - Lagunes-Espinoza LC AU - Huyghe C AU - Papineau J AD - INRA, Unite Genet & Ameliorat Plantes Fourrageres, F-86600 Lusignan, FranceColegio Postgrad Ciencias Agr, H Cardenas 86500, Tabasco, MexicoHuyghe, C, INRA, Unite Genet & Ameliorat Plantes Fourrageres, F-86600 Lusignan, France TI - Genetic inheritance of proportion of pod walls and other yield components in white lupin AB - The present study was conducted to investigate the genetic inheritance of pod components in spring-sown white lupin. An analysis of the genetic parameters of proportion of pod walls and related pod components should be helpful to define a selection strategy in the future lupin breeding programs. Two mating designs were used, a complete diallel, and a half diallel without reciprocals and without selfing. The parental lines covered the range of genetic variation for the proportion of the pod walls available in the white lupin collection from INRA, France. Diallel analyses were carried out via Griffing (model I and II) and Hayman methods. Proportion of pod walls, seed weight per pod and mean seed weight showed a mainly additive inheritance. Narrow sense heritability was higher for the proportion of pod walls than for the other pod components. The correlation between general combining ability (GCA) and parental phenotypic values was high for proportion of pod walls. This suggested that mean parental performance could be a useful indicator of mean cross performance for the proportion of pod walls in white lupin. For pure line breeding, the estimates of GCA values showed that Egyptian accessions would be valuable parents. Breeding for reduced proportion of pod walls may be a way of improving seed yield MH - France MH - Mexico|Tabasco PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000183323600008 L2 - GCA;Lupinus albus;inheritance;pod walls;SCA;yield traits;ARCHITECTURAL TRAITS; DRY BEANS; CONSEQUENCES SO - Euphytica 2003 ;131(3):305-311 8543 UI - 6767 AU - Laine B AU - Trapaga G AU - Prokhorov E AU - Morales-Sanchez E AU - Gonzalez-Hernandez J AD - IPN, Ctr Invest Estudios Avanzados, Unidad Queretaro, Juriquilla 76230, Queretaro, MexicoInst Natl Sci Appl, F-69621 Villeurbanne, FranceLaine, B, Inst Natl Sci Appl, 20 Av Albert Einstein, F-69621 Villeurbanne, France TI - Model for isothermal crystallization kinetics with metastable phase formation AB - In this letter we propose a simple computer stochastic model to represent and gain some insight into the kinetics of transformation in materials with metastable phase formation. This model explains deviations from the well-known Johnson-Mehl-Avrami-Kolmogorov kinetics theory and predicts the three slopes in Avrami's plot. The model predictions were compared with experimental results obtained from thin-film samples of Ge2Sb2Te5 during isothermal phase transformations. The model includes the two-stage transformation and is capable to reproduce the experimental transformation curves. (C) 2003 American Institute of Physics MH - France MH - Mexico|Queretaro PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000187181400025 L2 - JOHNSON-MEHL; GROWTH; NUCLEATION; KOLMOGOROV; BEHAVIOR; ALLOYS SO - Applied Physics Letters 2003 ;83(24):4969-4971 8544 UI - 9242 AU - Laine L AU - Connors LG AU - Reicin A AU - Hawkey CJ AU - Burgos-Vargas R AU - Schnitzer TJ AU - Yu QF AU - Bombardier C AD - Univ So Calif, Sch Med, Dept Med, GI Div, Los Angeles, CA 90033, USAMerck & Co Inc, Whitehouse Stn, NJ, USAUniv Nottingham, Nottingham NG7 2RD, EnglandHosp Gen Mexico City, Mexico City, DF, MexicoNorthwestern Univ, Chicago, IL 60611, USAUniv Toronto, Toronto, ON, CanadaLaine, L, Univ So Calif, Sch Med, Dept Med, GI Div, 2025 Zonal Ave, Los Angeles, CA 90033 USA TI - Serious lower gastrointestinal clinical events with nonselective NSAID or coxib use AB - Background & Aims: Epidemiologic studies suggest nonsteroidal anti-inflammatory drugs (NSAIDs) increase the risk for lower gastrointestinal (GI) clinical events, but data from prospective trials are lacking. Cyclooxygenase (COX 2-selective inhibitors decrease upper GI clinical events but the effect on lower GI events has not been determined. We performed a post hoc analysis of serious lower GI clinical events with a nonselective NSAID and a COX-2-selective agent in a prospective, double-blind, randomized GI outcomes trial. Methods: A total of 8076 rheumatoid arthritis patients 50 years or older (or 40 years or older on corticosteroid therapy) expected to require NSAIDs for I year or greater were randomly assigned to naproxen 500 mg twice daily or rofecoxib 50 mg daily. The rate of serious lower GI clinical events defined as bleeding with a 2 g/dL drop in hemoglobin or hospitalization, or hospitalization for perforation, obstruction, ulceration, or diverticulitis, was determined. Results: The rate of serious lower GI events per 100 patient-years was 0.41 for rofecoxib and 0.89 for naproxen (relative risk, 0.46; 95% confidence interval [Cl], 0.22-0.93; P = 0.032). Serious lower GI events accounted for 39.4% of all serious GI events (complicated upper GI event or lower GI event) among patients taking naproxen and 42.7% among those taking rofecoxib. Conclusions: Serious lower GI events occurred at a rate of 0.9% per year in rheumatoid arthritis patients taking the nonselective NSAID naproxen, accounting for nearly 40% of the serious GI events that developed in these patients. Serious lower GI events were 54% lower with the use of the selective COX-2 inhibitor rofecoxib MH - USA MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 100 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0016-5085 UR - ISI:000180732100005 L2 - NONSTEROIDAL ANTIINFLAMMATORY DRUGS; DIVERTICULAR-DISEASE; RHEUMATOID-ARTHRITIS; HEALTHY-SUBJECTS; ASPIRIN USE; ROFECOXIB; COMPLICATIONS; PLACEBO; RISK SO - Gastroenterology 2003 ;124(2):288-292 8545 UI - 7499 AU - Laird AR AU - Ibarra V AU - Ruiz-Palacios G AU - Guerrero ML AU - Glass RI AU - Gentsch JR AD - US Dept Hlth & Human Serv, Ctr Dis Control & Prevent, Div Viral & Rickettsial Dis, Viral Gastroenteritis Sect, Atlanta, GA 30333, USAInst Nacl Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoGentsch, JR, CDC, NCID, Viral Gastroenteritis Sect, MS G04,1600 Clifton Rd, Atlanta, GA 30333 USA TI - Unexpected detection of animal VP7 genes among common rotavirus strains isolated from children in Mexico AB - In the course of characterizing 103 rotaviruses from children in Mexico, we found that the majority of strains were globally common types (55.4% of total), while uncommon types represented 5.7%, mixed infections with common types represented 14.8%, and partially or fully nontypeable isolates represented about 24%. Serotype G9 was detected for the first time in Mexico. We sequenced a subset of strains that were G nontypeable by reverse transcriptase PCR and found surprisingly that two strains having common human rotavirus P genotypes (8 and 6) had serotype G3 and G4 VP7 gene sequences that shared closer homology with canine and porcine strains, respectively, than with human strains, suggesting that these isolates represented reassortants between human and animal rotaviruses MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000185246800059 L2 - POLYMERASE CHAIN-REACTION; NUCLEOTIDE-SEQUENCE; BOVINE ROTAVIRUSES; IDENTIFICATION; HYBRIDIZATION; SEROTYPE; BRAZIL; TRANSMISSION SO - Journal of Clinical Microbiology 2003 ;41(9):4400-4403 8546 UI - 8974 AU - Lamothe-Argumedo R AU - az-Camacho SP AU - Nawa Y AD - Miyazaki Med Coll, Dept Parasitol, Miyazaki 8891692, JapanUniv Autonoma Sinaloa, Fac Ciencias Quim Biol, Unidad Invest Slud Publ Luis Pasteur, Sinaloa, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Lab Helmintol Dr Eduardo Caballiero & Caballero, Mexico City 04510, DF, MexicoNawa, Y, Miyazaki Med Coll, Dept Parasitol, Miyazaki 8891692, Japan TI - The first human case in Mexico of conjunctivitis caused by the avian parasite, Philophthalmus lacrimosus AB - Species of Philophthalmus parasitize primarily the eyes of wild and domestic birds. A variety of mammals, including humans, occasionally serve as the intermediate as well as the definitive hosts for this parasite, although human cases are extremely rare. Here, we report a case of human conjunctivitis caused by an infection with Philophthalmus sp. in Mexico. The patient was a 31-yr-old male who visited an ophthalmologist in Los Mochis, Sinaloa, Mexico, because of a foreign-body sensation in his left eye for 2 mo. A small live parasite was found in the connective tissue of the bulbar conjunctiva and was removed surgically under local anesthesia under ophthalmoscopic observation. The parasite was identified morphologically as Philophthalmus lacri-mosus Braun, 1902. This is the first case of human philophthalmosis in Mexico and, to our knowledge, the first human case of P. lacrimosus infection in the world MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000181407300032 SO - Journal of Parasitology 2003 ;89(1):183-185 8547 UI - 6891 AU - Lampert A AU - Muller MM AU - Berchtold S AU - Lang KS AU - Palmada M AU - Dobrovinskaya O AU - Lang F AD - Univ Tubingen, Inst Physiol, D-72076 Tubingen, GermanyUniv Colima, Ctr Univ Invest Biomed, Colima, MexicoLang, F, Univ Tubingen, Inst Physiol, Gmelinstr 5, D-72076 Tubingen, Germany TI - Effect of dexamethasone on voltage-gated K+ channels in Jurkat T-lymphocytes AB - The voltage-gated K+ channel Kv1.3 is an important regulator of lymphocyte function. Activation of lymphocytes is accompanied by stimulation, whereas CD95-induced apoptosis by inhibition, of Kv1.3. The channel serves to maintain cell membrane potential, a prerequisite for signalling through the Ca2+ release-activated Ca2+ channel I-CRAC. As glucocorticoids are known to regulate lymphocyte function, the present study addressed the effect of dexamethasone on voltage-gated K+ channels in Jurkat T-lymphocytes. In whole-cell patch-clamp experiments current families evoked by 200-ms potential steps every 15 s from -70 mV to values from -120 to +100 mV revealed the functional expression of voltage-gated K+ channels. Pre-treatment of Jurkat T-lymphocytes for 2-3 h with 1 muM dexamethasone led to a significant decrease of voltage-gated K+ currents. Fura-2-fluorescence measurements showed that the readdition of Ca2+ to Ca2+-depleted cells led to a rapid increase of cytosolic Ca2+ activity. This increase of Ca2+ activity was blunted by both the K+ channel blocker margatoxin (10 nM) and 24 h pre-treatment with dexamethasone (1 muM). In conclusion, dexamethasone inhibits voltage-gated K+ channels in Jurkat T-lymphocytes, an effect impeding Ca2+ entry through I-CRAC MH - Germany MH - Mexico|Colima PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Physiology U5 - J;Article AV - English IS - 0031-6768 UR - ISI:000186589800007 L2 - Kv1.3;margatoxin;I-CRAC;glucocorticoid hormones;capacitative Ca2+ entry (CCE);THREONINE PROTEIN-KINASE; CELLULAR TAURINE RELEASE; NF-KAPPA-B; POTASSIUM CHANNEL; VOLUME REGULATION; DEPENDENT REGULATION; SIGNAL-TRANSDUCTION; INDUCED APOPTOSIS; ION CHANNELS; IN-VITRO SO - Pflugers Archiv-European Journal of Physiology 2003 ;447(2):168-174 8548 UI - 8162 AU - Landers MB AU - Peyman GA AU - Wessels IF AU - Whalen P AU - Morales V AD - Univ N Carolina, Sch Med, Dept Ophthalmol, Chapel Hill, NC 27599, USATulane Univ, Dept Ophthalmol, New Orleans, LA 70118, USAUniv Tennessee, Dept Ophthalmol, Chattanooga, TN, USAOcular Instruments Co, Bellevue, WA, USAHosp Dr Luis Sanchez Bulnes, Mexico City, DF, MexicoLanders, MB, Univ N Carolina, Sch Med, Dept Ophthalmol, Chapel Hill, NC 27599 USA TI - A new, non-contact wide field viewing system for vitreous surgery AB - PURPOSE: To report a new, noncontact wide field viewing system for vitreoretinal surgery. DESIGN,: Device description: A noncontact wide field viewing system consisting of adjustable hinged arm and a combined condensing lens and reinverting prism has been developed. The arm clamps onto the operating table or wrist rest and holds the lens system in the air above the eye. METHODS: For vitreoretinal surgery, a new, relatively inexpensive noncontact wide field viewing system consisting of an adjustable hinged arm and a combined condensing lens and reinverting prism has been developed. The combination condensing lens and reinverting prism is used without a microscope-mounted inverter. The optical component may be sterilized with ethylene oxide, peracetic acid, or glutaraldehyde. Other components may be steam autoclaved. RESULTS: The new, noncontact wide field viewing system has been used satisfactorily in more than 200 vitrectomies at seven medical centers. It provides an excellent view of the vitreous and retina. CONCLUSION: A new, noncontact wide field viewing system for vitreoretinal surgery has been developed with satisfactory image quality and a field of view comparable to contemporary noncontact panoramic viewing systems. (C) 2003 by Elsevier Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000183777100036 SO - American Journal of Ophthalmology 2003 ;136(1):199-201 8549 UI - 6830 AU - Landon PB AU - Gutierrez J AU - Ferraris JP AU - Martinez IL AU - Giridharagopal R AU - Wu YC AU - Lee S AU - Parikh K AU - Gillespie J AU - Ussery G AU - Karimi B AU - Baughman R AU - Zakhidov A AU - Glosser R AD - Univ Texas, Dept Phys, Richardson, TX 75080, USAUniv Texas, Nano Tech Inst, Richardson, TX 75080, USAUniv Texas, Dept Chem, Richardson, TX 75080, USAUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoLandon, PB, Univ Texas, Dept Phys, 2601 N Floyd Rd, Richardson, TX 75080 USA TI - Inverse gold photonic crystals and conjugated polymer coated opals for functional materials AB - Inverse gold photonic crystals templated from synthetic opals with a face centered cubic (FCC) crystal lattice were constructed by heat converting gold chloride to metallic gold. Tetrahedral formations constructed of alternating large and small octahedrons oriented in the zinc sulfide structure were created by controlling the infiltration of gold chloride. Silica spheres were coated with polyanifinesulfonic acid, polypyrrole, poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and 5nm colloidal gold. Ordinary yeast cells were coated with polyanifinesulfonic acid, polypyrrole and 5 nm colloidal gold. Spheres coated with MEH-PPV were dispersed in H2O and coated with polyelectrolytes which recharged and sterically stabilized the colloidal surfaces. The recharged spheres self-assembled by sedimentation with a FCC crystalline lattice possessing 500 mum wide and 1 mm long crystallites. Silica spheres with diameters as large as 1500 mum were self-assembled along the [100] direction of the FCC crystal lattice. Opals infiltrated with gold and opals constructed from polymer coated spheres were co-infiltrated with polypropylene yielding inverse polypropylene composite photonic crystals. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000186812200033 L2 - gold;photonic crystals;metallic;colloidal;silica;COLLOIDAL TEMPLATES; SILICA; PARTICLES SO - Physica B-Condensed Matter 2003 ;338(1-4):165-170 8550 UI - 8979 AU - Lang IG AU - Korovin LI AU - de la Cruz-Alcaz J AU - Pavlov ST AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Fac Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, RussiaLang, IG, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - Quantum theory of conductivity of spatially inhomogeneous systems AB - A quantum theory of conductivity is constructed for semiconductor objects such as quantum wells, wires, and dots. The mean values of current and charge densities induced by a weak electromagnetic field are calculated. It is shown that the mean values of current and charge densities consist of two parts, the first of which is expressed in terms of the electric field and the second is expressed in terms of derivatives of the electric field with respect to spatial coordinates. Appropriate expressions are derived for the conductivity tensor that depends on coordinates; these expressions can be applied to any spatially inhomogeneous systems. The results obtained can be used in the theory of secondary radiation from objects of reduced dimension in the cases of monochromatic or pulsed irradiation. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1063-7761 UR - ISI:000181441300010 L2 - PENETRATION; WELL SO - Journal of Experimental and Theoretical Physics 2003 ;96(2):268-285 8551 UI - 7258 AU - Langer JC AU - Durrant AC AU - de la Torre L AU - Teitelbaum DH AU - Minkes RK AU - Caty MG AU - Wildhaber BE AU - Ortega SJ AU - Hirose S AU - Albanese CT AD - Univ Toronto, Dept Surg, Toronto, ON, CanadaInst Nacl Pediatria, Dept Surg, Mexico City, DF, MexicoUniv Michigan, Dept Surg, Ann Arbor, MI 48109, USAWashington Univ, Dept Surg, St Louis, MO, USASUNY Buffalo, Dept Surg, Buffalo, NY 14260, USAUniv Calif San Francisco, Dept Surg, San Francisco, CA 94143, USALanger, JC, Hosp Sick Children, 555 Univ Ave,Rm 1526, Toronto, ON M5G 1X8, Canada TI - One-stage transanal soave pullthrough for Hirschsprung disease - A multicenter experience with 141 children AB - Background: The surgical management of Hirschsprung's disease (HD) has evolved from the original 3-stage approach to the recent introduction of minimal-access single-stage techniques. We reviewed the early results of the transanal Soave pullthrough from 6 of the original centers to use it. Methods: The clinical course of all children with HD undergoing a I-stage transanal Soave pullthrough between 1995 and 2002 were reviewed. Children with a preliminary stoma or total colonic disease were excluded. Results: There were 141 patients. Mean time between diagnosis and surgery was 32 days, and mean age at surgery was 146 days. Sixty-six (47%) underwent surgery in the first month of life. Forty-seven (33%) had the pathologic transition zone documented laparoscopically or through a small umbilical incision before beginning the anal dissection. Mean blood loss was 16 mL, and no patients required transfusion. Mean time to full feeding was 36 hours, mean postoperative hospital stay was 3.4 days, and 87 patients (62%) required only acetaminophen for pain. Early postoperative complications included perianal excoriation (11%), enterocolitis (6%), and stricture (4%). One patient died of congenital cardiac disease. Mean follow-up was 20 months; 81% had normal bowel function for age, 18% had minor problems, and 1% had major problems. Two patients required a second operation (twisted pullthrough, and residual aganglionosis). One patient developed postoperative adhesive bowel obstruction. Conclusion: To date, this report represents the largest series of patients undergoing the I-stage transanal Soave pullthrough. This approach is safe, permits early feeding, causes minimal pain, facilitates early discharge, and presents a low rate of complications MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 28 U4 - Surgery U5 - J;Article AV - English IS - 0003-4932 UR - ISI:000185926500024 L2 - ENDORECTAL PULL-THROUGH; AGANGLIONOSIS; INFANTS; SURGERY SO - Annals of Surgery 2003 ;238(4):569-573 8552 UI - 6711 AU - Lantican MA AU - Pingali PL AU - Rajaram S AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUN, FAO, Rome, ItalyLantican, MA, CIMMYT, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Is research on marginal lands catching up? The case of unfavourable wheat growing environments AB - It is widely believed that the Green Revolution had very little effect in unfavourable or marginal environments. Many researchers have been concerned about the slow progress of technical change in marginal environments and the level of research resources allocated to these areas. This paper provides empirical evidence that there has been significant growth in wheat yield potential in marginal environments, especially during the post-Green Revolution. International yield trial data, covering all major wheat growing environments from 1964 to 1999, were used in estimating the growth in wheat yield potential and changes in yield variability. The global database on wheat varietal adoption and yield gains based on estimated wheat yield growth rates were used to determine production increases due to wheat breeding research. Results show greater progress in shifting the wheat yield frontier in marginal areas, particularly in drought and high temperature environments. Furthermore, yield variability in marginal environments has notably declined, while it has increased slightly in favourable environments. While initial gains came from crossover of varieties from favourable environments, targeted breeding efforts have contributed significantly to more recent productivity growth in marginal environments. Increased production from marginal environments accounted for around 25% of the total wheat production increase in 1997. These findings show greater progress in wheat research and the huge potential of improving wheat productivity in unfavourable environments. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000187214000012 L2 - mega-environment;yield potential;yield variability;production increase;crossover;spill-over SO - Agricultural Economics 2003 ;29(3):353-361 8553 UI - 8337 AU - Lara A AU - Gopalswamy N AU - Nunes S AU - Munoz G AU - Yashiro S AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USACatholic Univ Amer, Washington, DC 20064, USALara, A, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - A statistical study of CMEs associated with metric type II bursts AB - [1] We present a statistical study of the characteristics of CMEs which show temporal association with type II bursts in the metric domain but not in the decameter/hectometric (DH) domain. This study is based on a set of 80 metric (m) type II bursts associated with surface events in the solar western hemisphere. It was found that in general, the distribution of the widths and speeds of the CMEs associated with metric (but not DH) type II bursts are shifted towards higher values compared to those of all CMEs observed by LASCO in the 1996-2001 period. We also found that these distributions have lower values than the same distributions of the CMEs associated with DH type II bursts. In terms of energy, this means that the CMEs associated only with metric type II bursts are more energetic (wider and faster) than regular CMEs but less energetic than the CMEs associated with DH type II bursts MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000183178000003 L2 - CORONAL MASS EJECTIONS; WIND SPACECRAFT DATA; RADIO-BURSTS; INTERPLANETARY SHOCKS; SOLAR ERUPTIONS; ORIGIN; SIGNATURES; WAVE SO - Geophysical Research Letters 2003 ;30(12): 8554 UI - 9398 AU - Lara MA AU - Nof SY AD - Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907, USATompkins & Associates, Monterrey, MexicoNof, SY, Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907, USA TI - Computer-supported conflict resolution for collaborative facility designers AB - Fundamental in engineering design is the notion that collaboration is useful to reduce total project development time and increase design quality. A critical element of collaborative design is the resolution of conflict situations that result naturally from the interaction of cooperating designers, particularly when they are widely dispersed. A multi-approach method for computer-supported resolution of conflict situations in collaborative facility design is introduced. The method is based on social sciences theories used to solve human conflicts. FDL-CR, an extension of the Facility Description Language (FDL) with conflict resolution capabilities provided by the new tool, is the major development in this research. It provides fast identification of the conflict situation, diagnostics of conflict parameters, access to the conflict information by all conflicting parties and mechanisms for conflict resolution. The usefulness of FDL-CR is evaluated with a design case study where a neural-fuzzy inference system is developed to validate the conflict resolution method through the confrontation of conflicting parties. Computer-supported confrontation of conflicting parties was effective when other approaches, such as third-party mediation and persuasion, failed to provide conflict resolution. The new tool is viewed as an essential component of virtual design and manufacturing, and in general e-work MH - Mexico|Nuevo Leon MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Industrial;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7543 UR - ISI:000180296400001 L2 - CONCURRENT ENGINEERING DESIGN; SYSTEMS; ENVIRONMENT; MANAGEMENT; LAYOUT SO - International Journal of Production Research 2003 ;41(2):207-233 8555 UI - 8662 AU - Larios-Lopez L AU - Navarro-Rodriguez D AU - rias-Marin EM AU - Moggio I AU - Reyes-Castaneda CV AU - Donnio B AU - LeMoigne J AU - Guillon D AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Strasbourg 1, CNR, UMR 7504, GMO,IPCMS, F-67037 Strasbourg, FranceNavarro-Rodriguez, D, Ctr Invest Quim Aplicada, Blvd Enrique Reyna 140, Saltillo 25100, Coahuila, Mexico TI - Oligo(p-phenylene)s substituted with long alkoxy chains - I. Thermotropic liquid crystalline properties and UV absorption/emission characteristics AB - A series of linear oligo(p-phenylene)s containing three, five and seven phenylene groups, modified with short lateral and long terminal alkoxy chains, were synthesized via Palladium complex-catalysed cross-coupling reactions. The thermotropic liquid crystalline and UV absorption/emission properties of these compounds were studied. It was observed that tri(p-phenylene)s develop a rich mesomorphism including tilted smectic type mesophases (SmC and SmF/SmI) and the nematic phase, whereas penta- and hepta-(p-phenylene)s substituted with short lateral chains develop only the nematic phase. From these observations it is clear that the short lateral chains hinder the layered molecular packing typical of smectic phases and promote the formation of the less ordered liquid-like nematic phase. Mesophases appeared at lower temperatures when longer end chains were used. The optical properties studied by UV-Vis and emission spectroscopy indicate that these systems are promising candidates for blue-emitting layers in electroluminescent devices MH - France MH - Mexico|Coahuila PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 6 U4 - Crystallography U5 - J;Article AV - English IS - 0267-8292 UR - ISI:000182330300003 L2 - LIGHT-EMITTING-DIODES; MAIN-CHAIN; POLARIZED ELECTROLUMINESCENCE; POLYMERS; FILMS; PHOTOLUMINESCENCE; OLIGOMERS; EMISSION; SEGMENTS; LENGTH SO - Liquid Crystals 2003 ;30(4):423-433 8556 UI - 6727 AU - Larralde H AU - Berezhkovskii AM AU - Weiss GH AD - NIH, Ctr Informat Technol, Bethesda, MD 20892, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaWeiss, GH, NIH, Ctr Informat Technol, Bldg 10, Bethesda, MD 20892, USA TI - Effects of an absorbing boundary on the average volume visited by N spherical Brownian particles AB - The number of distinct sites visited by a lattice random walk and its continuum analog, the volume swept out by a diffusing spherical particle are used to model different phenomena in physics, chemistry and biology. Therefore the problem of finding statistical properties of these random variables is of importance. There have been several studies of the more general problem of the volume of the region explored by N random walks or Brownian particles in an unbounded space. We here study the effects of a planar absorbing boundary on the average of this volume. The boundary breaks the translational invariance of the space, and introduces an additional spatial parameter, the initial distance of the Brownian particles from the surface. We derive expressions for the average volume visited in three dimensions and the average span in one dimension as functions of the time for given values of the initial distance to the absorbing boundary and N. The results can be transformed to those for N lattice random walks by appropriately choosing the radius and diffusion constant of the spheres. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000187225600023 L2 - reaction kinetics;optical measurements;Wiener sausage volume;MODEL SO - Physica A-Statistical Mechanics and Its Applications 2003 ;330(1-2):167-176 8557 UI - 7649 AU - Larralde H AU - Weiss GH AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoNIH, Ctr Informat Technol, Bethesda, MD 20892, USALarralde, H, UNAM, Ctr Ciencias Fis, Av Univ S-N Col, Cuernavaca 62210, Morelos, Mexico TI - Expected number of distinct sites visited by N random walks in the presence of an absorbing boundary AB - In earlier work we have studied the expected number of distinct sites. (ENDS) visited by N random walkers in time t on a translationally invariant lattice. Optical applications suggest the interest in analysing the same problem for a semi-infinite lattice in three dimensions bounded by a plane of absorbing sites. We here study this problem, showing a multiplicity of time regimes, and at the longest times showing that the ENDS is proportional to Nroott where t is the time. In the absence of a boundary the comparable result is proportional to Nt. Thus, the boundary effect eliminates approximately roott random walks MH - Mexico|Morelos MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000184962200002 L2 - PHOTON MIGRATION; MEDIA; MODEL SO - Journal of Physics A-Mathematical and General 2003 ;36(31):8367-8372 8558 UI - 6967 AU - Larrazabal G AU - Torres CR AU - Castillo J AD - San Diego State Univ, Comp Sci Res Ctr, San Diego, CA 92812, USAUniv Autonoma Baja California, FACYT, Dept Comp Sci, Ensenada, Baja California, MexicoSan Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92182, USACastillo, J, San Diego State Univ, Comp Sci Res Ctr, San Diego, CA 92812 USA TI - An efficient and robust algorithm for 2D stratified fluid flow calculations AB - An efficient and robust algorithm for numerical simulation of 2D stratified flow past an object is presented. The algorithm uses an accurate and efficient GMRES to solve the pressure. The algorithm is tested by simulating the flow past an infinite flat plate in uniform flow for various flow conditions. Results are presented for the density and velocity along with comparisons to the exact solution for this problem. (C) 2003 IMACS. Published by Elsevier B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000186602300017 L2 - stratified fluid;SPHERE SO - Applied Numerical Mathematics 2003 ;47(3-4):493-502 8559 UI - 6675 AU - Laska M AU - Scheuber HP AU - Salazar LTH AU - Luna ER AD - Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, GermanyUniv Munich, Sch Med, Dept Surg, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuroetol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, Germany TI - Sour-taste tolerance in four species of nonhuman primates AB - The taste of most fruits is characterized by a mixture of sensations termed sweet and sour by humans, and the food selection behavior of primates suggests that they may use the relative salience of sweetness and sourness to assess palatability of potential food items. Therefore, taste responses of six squirrel monkeys, five pigtail macaques, four olive baboons, and four spider monkeys to sweet - sour taste mixtures were assessed in two- bottle preference tests of brief duration ( 2 min). Monkeys were given the choice between a reference solution of 50 mM sucrose and mixtures containing 10, 30, or 50 mM citric acid plus 10, 20, 50, 100, 200, 400, 800, or 1000 mM sucrose. We found that the four species differed markedly in their acceptance of physiological concentrations of sour-tasting citric acid. Whereas olive baboons showed the highest degree of sour-taste tolerance and actually preferred most of the sweet - sour taste mixtures over sweet- tasting reference solutions, squirrel monkeys showed the lowest degree of sour- taste tolerance and rejected most of the sweet - sour taste mixtures even when they contained considerably more sucrose than the reference solutions. Additional tests demonstrated that the preference for sweet - sour taste mixtures was not based on masking effects. Rather, the animals perceived both the sweetness and the sourness of the taste mixtures and made a trade- off between the attractive and aversive properties of the two taste qualities. The results of this study suggest that the proximate reason for the marked differences in acceptance of sweet - sour taste mixtures are differences among species in the hedonic evaluation of the sour taste of citric acid. Possible ultimate reasons, which do not necessarily exclude, but may complement each other, include evolutionary adaptation to dietary specialization, avoidance of competition pressure, and phylogenetic relatedness MH - Germany MH - Mexico|Veracruz PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Ecology U5 - J;Article AV - English IS - 0098-0331 UR - ISI:000187278100002 L2 - sour-taste tolerance;sweet-sour taste mixtures;Saimiri;Ateles;Macaca;Papio;food preference;FOOD-ASSOCIATED SUGARS; MONKEY SAIMIRI-SCIUREUS; ATELES-GEOFFROYI; GUSTATORY RESPONSIVENESS; DIFFERENCE THRESHOLDS; NUTRIENT COMPOSITION; MACACA-NEMESTRINA; PIGTAIL MACAQUES; SQUIRREL-MONKEYS; PREFERENCES SO - Journal of Chemical Ecology 2003 ;29(12):2637-2649 8560 UI - 9034 AU - Laska M AU - Baltazar JML AU - Luna ER AD - Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuroetol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Med Psychol, Goethestr 31, D-80336 Munich, Germany TI - Food preferences and nutrient composition in captive pacas, Agouti paca (Rodentia, Dasyproctidae) AB - The purpose of this study was to assess the occurrence of food preferences in captive pacas, a frugivorous New World rodent species, and to analyse whether these preferences correlate with nutrient composition. Using a two-alternative choice test six Agouti poca were repeatedly presented with all possible binary combinations of 12 types of food which are part of their diet in captivity and found to display the following rank order of preference: mango > avocado > melon > papaya > banana > orange > pineapple > tomato > apple > cucumber > carrot > chayote. Correlational analyses revealed that this preference ranking showed a significant positive correlation with total energy content, irrespective of the source of energy as neither total carbohydrate content nor protein or tipid content were significantly correlated with food preference. Further, food preferences were significantly negatively correlated with water content. No other significant correlations between food preferences and any other macro- or micronutrient were found. These results suggest that pacas, despite their dietary specialisation on ripe and carbohydrate-rich fruits, are opportunistic feeders with regard to maximizing their net gain of energy MH - Germany MH - Mexico|Veracruz PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 1616-5047 UR - ISI:000181284800003 L2 - Agouti poca;food preferences;nutrient composition;frugivory;SEASONAL-VARIATION; DIETARY-RESPONSE; FRUIT ABUNDANCE; DAIRY-COWS; SELECTION; MONKEYS; HERBIVORES; CERCOPITHECINES; CHIMPANZEES; CHOICE SO - Mammalian Biology 2003 ;68(1):31-41 8561 UI - 9074 AU - Laska M AU - Salazar LTH AU - Luna ER AD - Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuroetol, Jalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Med Psychol, Goethestr 31, D-80336 Munich, Germany TI - Successful acquisition of an olfactory discrimination paradigm by spider monkeys, Ateles geoffroyi AB - The present study demonstrates that an operant conditioning paradigm-originally designed for assessing olfactory performance in an Old World primate, the pigtail macaque-can successfully be adapted for use with a New World primate, the spider monkey. Using a task based on a food-rewarded, two-choice discrimination of simultaneously presented odor stimuli, Ateles geoffroyi is capable of learning to discriminate between objects on the basis of odor cues. Moreover, animals could readily transfer to new S+ and S- stimuli, and could remember the significance of previously learned odor stimuli even after a 4-week break. We could also show that this method is suitable for obtaining reliable measures of olfactory sensitivity. Our results indicate that A. geoffroyi clearly outperforms Macaca nemestrina With regard to the speed of initial task acquisition and the ability to master transfer tasks, and shows a sensitivity to a food-related odorant which matches that of other primate species. (C) 2002 Elsevier Science Inc. All rights reserved MH - Germany MH - Mexico|Veracruz PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000181146200018 L2 - spider monkeys;Ateles geoffroyi;odor learning;olfactory performance;behavioral testing;SQUIRREL-MONKEYS; SAIMIRI-SCIUREUS; ODOR MEMORY; CEBUS-APELLA; PERFORMANCE; PRIMATES; COMMUNICATION; COMPONENTS; ABILITY SO - Physiology & Behavior 2003 ;78(2):321-329 8562 UI - 6835 AU - Lasserre JB AU - Zeron ES AD - CNRS, LAAS, F-31077 Toulouse 4, FranceInst Politecn Nacl, CIVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoLasserre, JB, CNRS, LAAS, 7 Ave Colonel Roche, F-31077 Toulouse 4, France TI - On counting integral points in a convex rational polytope AB - Given a convex rational polytope Omega(b) := {x is an element of R-+(n)\ Ax=b}, we consider the function b-->f (b), which counts the nonnegative integral points of Omega(b). A closed form expression of its Z-transform z-->F(z) is easily obtained so that f (b) can be computed as the inverse Z-transform of F. We then provide two variants of an inversion algorithm. As a by-product, one of the algorithms provides the Ehrhart polynomial of a convex integer polytope Omega. We also provide an alternative that avoids the complex integration of F(z) and whose main computational effort is to solve a linear system. This latter approach is particularly attractive for relatively small values of m, where m is the number of nontrivial constraints (or rows of A) MH - France MH - Mexico|Distrito Federal PB - LINTHICUM HTS: INST OPERATIONS RESEARCH MANAGEMENT SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 0364-765X UR - ISI:000186855400011 L2 - counting;integral point;polytope;Ehrhart polynomial;POLYHEDRA; ALGORITHM SO - Mathematics of Operations Research 2003 ;28(4):853-870 8563 UI - 8811 AU - Latora V AU - Rapisarda A AU - Robledo A AD - Univ Catania, Dipartimento Fis & Astron, I-95123 Catania, ItalyIst Nazl Fis Nucl, I-95123 Catania, ItalyUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoLatora, V, Univ Catania, Dipartimento Fis & Astron, Via S Sofia 64, I-95123 Catania, Italy TI - Revisiting disorder and Tsallis statistics MH - Italy MH - Mexico|Distrito Federal PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000182135400023 L2 - POWER-LAW SENSITIVITY; INITIAL CONDITIONS; MAPS; NONEXTENSIVITY; EQUILIBRIUM; DYNAMICS; CHAOS SO - Science 2003 ;300(5617):250-251 8564 UI - 8740 AU - Latorre FG AU - Hernandez-Avila M AU - Orozco JT AU - Medina CAA AU - Aro A AU - Palazuelos E AU - Hu H AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoCom Mexicano Estudio Osteoporosis, Mexico City, DF, MexicoHosp Med, Mexico City, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Toxicol, Mexico City, DF, MexicoHarvard Univ, Sch Med, Brigham & Womens Hosp, Dept Med,Channing Lab, Boston, MA, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USAAmer British Cowdray Hosp, Mexico City, DF, MexicoHernandez-Avila, M, Inst Nacl Salud Publ, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Relationship of blood and bone lead to menopause and bone mineral density among middle-age women in Mexico City AB - To describe the relationship of blood lead levels to menopause and bone lead levels, we conducted a cross-sectional study on 232 pre- or perimenopausal (PreM) and postmenopausal (PosM) women who participated in an osteoporosis-screening program in Mexico City during the first quarter of 1995. Information regarding reproductive characteristics and known risk factors for blood lead was obtained using a standard questionnaire by direct interview. The mean age of the population was 54.7 years (SD = 9.8), with a mean blood lead level of 9.2 mug/dL (SD = 4-7/dL) and a range from 2.1 to 32.1 mug/dL. After adjusting for age and bone lead levels, the mean blood lead level was 1.98 mug/dL higher in PosM women than in PreM women (p = 0.024). The increase in mean blood lead levels peaked during the second year of amenorrhea with a level (10.35 mug/dL) that was 3.51 mug/dL higher than that of PreM women. Other important predictors of blood lead levels were use of lead-glazed ceramics, schooling, trabecular bone lead, body mass index, time of living in Mexico City, and use of hormone replacement therapy. Bone density was not associated with blood lead levels. These results support the hypothesis that release of bone lead stores increases during menopause and constitutes an internal source of exposure possibly associated with health effects in women in menopause transition MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000182144300056 L2 - blood lead;bone lead;bone mineral density;menopause;Mexico;X-RAY-FLUORESCENCE; POSTMENOPAUSAL WOMEN; ELDERLY WOMEN; TOXICITY; DETERMINANTS; OSTEOPOROSIS; EXPOSURE SO - Environmental Health Perspectives 2003 ;111(4):631-636 8565 UI - 8281 AU - Laundre J AU - Clark TW AD - Inst Ecol, AC, Durango 34100, Dgo, MexicoIdaho State Univ, Pocatello, ID 83209, USAYale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511, USANo Rockies Conservat Cooperat, Jackson, WY 83001, USALaundre, J, Inst Ecol, AC, Km 5 Carr Durango Mazatlan, Durango 34100, Dgo, Mexico TI - Managing puma hunting in the western United States: through a metapopulation approach AB - To achieve long-term viability of hunted puma (Puma concolor) populations (even at historically low densities), we propose a management plan based on the metapopulation concept that designates source areas (closed to hunting) and sink areas (open to hunting). We use 11 years of data from Idaho and Utah to demonstrate how the proposed management plan might be implemented. We use minimum and maximum densities of resident animals to calculate minimum and maximum effective population sizes, a the units. We designate sink neighbourhood areas (regional management units) and usable habitat within and source areas based on their size, accessibility to hunters and juxtaposition. We show that closing 63% of puma habitat to hunting would ensure long-term puma population viability while permitting traditional hunting levels in other areas. This system could be adapted to existing state (and interstate) hunting management units, and we outline several steps by which wildlife agencies might set up a process (including public participation) to manage puma hunting MH - Mexico|Durango MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1367-9430 UR - ISI:000183461600009 L2 - MOUNTAIN LION; COUGARS; POPULATION; MANAGEMENT; EXTINCTION; ACCEPTANCE; CAPACITY; COLORADO; MONTANA; ALBERTA SO - Animal Conservation 2003 ;6():159-170 8566 UI - 6400 AU - Lavalle P AU - Ortiz S AU - Buot G AU - Suchil P AU - Caire P AU - Orozco C AU - Reynoso S AD - Hop Tenon, Lab Parasitol Mycol, F-75020 Paris, FranceCtr Dermatol Pascua, Serv Micol, Mexico City, DF, MexicoBuot, G, Hop Tenon, Lab Parasitol Mycol, 4 Rue Chine, F-75020 Paris, France TI - Cephalic actinomycetoma due to Nocardia asteroides in Mexico AB - We report the case of a 71-year-old man, Mexican peasant, presenting a mycetoma on the left side of the face with a 15 years duration. Direct examination and biopsy showed small grains characteristic of the genus Nocardia. Culture on Sabouraud dextrose agar yielded an aerobic Actinomycete which was identified. according to its physiological properties, as Nocardia asteroides. Treatment with clotrimoxazole plus diaminodiphenyl-sulfone resulted in clinical cure within 3 months. Two years later the patient remained completely cured. In Mexico actinomycetoma are much more frequent (97.9%) than eumycetoma, especially those caused by Nocardia brasiliensis (68%), Nocardia spp. grains (19.5%); N. asteroides and N. otitidiscaviarum, as well as Actinomadura pelletieri are exceptionnally encountered. A. madurae is second (10%) and Streptomyces somaliensis third (1.3%). Localization of mycetoma on the head is rare in our series (2.4%) MH - France MH - Mexico|Distrito Federal PB - MOULINEAUX CEDEX 9: MASSON EDITEUR RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - French IS - 1156-5233 UR - ISI:000188584200010 L2 - actinomycetoma;Nocardio asteroids;cephalic mycetoma;Mexico;BRASILIENSIS SO - Journal de Mycologie Medicale 2003 ;13(4):207-210 8567 UI - 7311 AU - Lavaniegos BE AU - Ohman MD AD - Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093, USACtr Invest Cient & Educ Super Ensenada, Dept Ecol, Ensenada 22800, Baja California, MexicoLavaniegos, BE, Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093 USA TI - Long-term changes in pelagic tunicates of the California Current AB - This study analyzes interannual variability in springtime carbon biomass of pelagic tunicates (salps, doliolids, pyrosomes. and appendicularians) over the period 1951-2002 from CalCOFI zooplankton samples taken in the southern sector of the California Current System. The results provide evidence for ecosystem changes between 1976 and 1977 and perhaps between 1998 and 1999. A cool-phase group of salps (Salpa maxima, Pegea socia, Cyclosalpa bakeri, and Cyclosalpa affinis) that was present between 1951 and 1976 was nearly undetectable in Southern California waters,finis then re-appeared in 2001. A during the warm phase of the California Current (1977-98). C. bakeri and C. affinis then re-appeared in 2001. A persistent group of salps (Salpa aspera, Salpa fusiformis, Thalia democratica, Ritteriella picteti, lasis zonaria) was observed throughout the study period. The cool-phase species tend to be distributed in mid-latitudes, while the distributions of the persistent species extend to equatorial waters. The cool-phase species have been reported to show little evidence of diel vertical migration, while most of the persistent species are reported to be diel migrants. No distinct multi-decadal patterns were observed in the dominant doliolid Dolioletta gegenbauri, but the rarer subtropical doliolid Doliolum denticulatum was present predominantly during the warm phase of the California Current. The recurrence patterns and biogeographic distributions of both salps and doliolids suggest that the warm phase of the California Current was accompanied by at least some intervals of anomalous transport "seeding" organisms from the south. Variations in total pyrosome and total appendicularian carbon biomass are not clearly related to long-term trends in the water column, although the highest pyrosome biomass occurred in earlier decades and appendicularian biomass has increased since 1999. Long-term changes in the biomass of pelagic tunicates appear to be chiefly responsible for the previously documented long-term decline in California Current total zooplankton biomass. The pattern of decline appeared to reverse in 1999, with a shift to cooler temperatures, somewhat reduced thermal stratification, and an increase in biomass of total zooplankton and of pelagic tunicates. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Oceanography U5 - J;Review AV - English IS - 0967-0645 UR - ISI:000185808000009 L2 - PYROSOMA-ATLANTICUM TUNICATA; GEGENBAURI ULJANIN TUNICATA; EASTERN NORTH PACIFIC; SUB-ARCTIC PACIFIC; GULF-OF-ALASKA; SEA-ICE EXTENT; SOUTHERN CALIFORNIA; THALIA-DEMOCRATICA; CURRENT SYSTEM; GROWTH-RATES SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2003 ;50(14-16):2473-2498 8568 UI - 7899 AU - Lazcano A AU - Bada JL AD - UNAM, Fac Ciencias, Mexico City, DF, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USALazcano, A, UNAM, Fac Ciencias, Apdo Postal 70-407,Cd Univ, Mexico City, DF, Mexico TI - The 1953 Stanley L. Miller experiment: Fifty years of prebiotic organic chemistry AB - The field of prebiotic chemistry effectively began with a publication in Science 50 years ago by Stanley L. Miller on the spark discharge synthesis of amino acids and other compounds using a mixture of reduced gases that were thought to represent the components of the atmosphere on the primitive Earth. On the anniversary of this landmark publication, we provide here an accounting of the events leading to the publication of the paper. We also discuss the historical aspects that lead up to the landmark Miller experiment MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Biology U5 - J;Article AV - English IS - 0169-6149 UR - ISI:000184253000002 L2 - prebiotic chemistry;reducing atmosphere;Strecker synthesis;electric discharges SO - Origins of Life and Evolution of the Biosphere 2003 ;33(3):235-242 8569 UI - 6872 AU - Leal-Herrera Y AU - Torres J AU - Monath TP AU - Ramos I AU - Gomez A AU - Madrazo-de la Garza A AU - hesa-Violante M AU - Munoz O AD - Inst Mexicano Seguro Social, Unidad Invest Enfermedades Infecciosas, Ctr Med Nacl Siglo XXI, Mexico City, DF, MexicoAcambis Inc, Cambridge, MA, USAHosp Especialidades Ctr Med La Raza, Hosp Pediat & Gastroenterol, Ctr Med Nacl Siglo XXI, Inst Mexicano Segurio Social, Mexico City 01580, DF, MexicoTorres, J, Av Centenario 1707-39, Mexico City 01580, DF, Mexico TI - Hiah rates of recurrence and of transient reinfections of Helicobacter pylori in a population with high prevalence of infection AB - OBJECTIVES: Little is known concerning the magnitude of reinfection versus recrudescence of Helicobacter pylori (H. pylori) infection after eradication treatment. The aims of this study were to determine the magnitude of H. pylori reinfection versus recrudescence, and to identify possible risk factors for reinfection. METHODS: Children and adults with upper GI symptoms treated at the Centro Medico Nacional Siglo XXI (Instituto Mexicano del Seguro Social, in Mexico City, Mexico) were studied. H. pylori infection was diagnosed with urea breath test (UBT), histology, and culture. Infected patients received triple therapy, and those who became UBT negative 4 - 6 wk after treatment were considered as eradicated and were included in the study. A cohort of 141 patients in whom the disease was eradicated was monitored for recurrence with UBT at 3, 6, 9, 12, 18, and 24 months. H. pylori was isolated from gastric biopsy samples before treatment and at recurrence and isolates compared by genotyping. RESULTS: During this period, 32 (22.7%) cases of recurrence were documented the majority occurring during yr 1. In nine of the 32 (28.1%) cases, recurrence was eradicated spontaneously, suggesting these were transient reinfections. Recurrence rates were significantly higher in the subjects 41-60 yr of age than in younger or older subjects. H. pylori isolates from 12 recurrence cases were genotyped; nine (75%) were classified as true reinfection and three as recrudescence. CONCLUSIONS: In our population, recurrence rate is high in adults and transient reinfection is common. In several cases, reinfection occurred by multiple strains, which suggests that soon after eradication, patients are exposed to multiple sources of reinfection. (C) 2003 by Am. Coll. of Gastroenterology MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 13 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0002-9270 UR - ISI:000186750500010 L2 - DUODENAL-ULCER RECURRENCE; SUCCESSFUL ERADICATION; FOLLOW-UP; NATURAL-HISTORY; CHILDREN; THERAPY; RECRUDESCENCE; EPIDEMIOLOGY; COMMUNITY; GASTRITIS SO - American Journal of Gastroenterology 2003 ;98(11):2395-2402 8570 UI - 8041 AU - Leanos-Miranda A AU - Ulloa-Aguirre A AU - Ji TH AU - Janovick JA AU - Conn PM AD - Oregon Hlth & Sci Univ, Portland, OR 97239, USAOregon Natl Primate Res Ctr, Beaverton, OR 97006, USAInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City 10101, DF, MexicoUniv Kentucky, Dept Chem, Lexington, KY 40506, USAConn, PM, Oregon Hlth & Sci Univ, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA TI - Dominant-negative action of disease-causing gonadotropin-releasing hormone receptor (GnRHR) mutants: A trait that potentially coevolved with decreased plasma membrane expression of GnRHR in humans AB - Loss of function by 11 of 13 naturally occurring mutations in the human GnRH receptor (hGnRHR) was thought to result from impaired ligand binding or effector coupling, but actually results from receptor misrouting. Homo- or heterodimerization of mutant receptors with wild-type (WT) receptors occurs for other G protein-coupled receptors and may result in dominant-negative or -positive effects on the WT receptor. We tested the hypothesis that WT hGnRHR function was affected by misfolded hGnRHR mutants. hGnRHR mutants were found to inhibit the function of WT GnRHR (measured by activation of effector and ligand binding). Inhibition varied depending on the particular hGnRHR mutant coexpressed and the ratio of hGnRHR mutant to WT hGnRHR cDNA cotransfected. The hGnRHR mutants did not interfere with the function of genetically modified hGnRHRs bearing either a deletion of primate-specific Lys(191) or the carboxyl-terminal tail of the catfish GnRHR; these show intrinsically enhanced expression. Moreover, a peptidomimetic antagonist of GnRH enhanced the expression of WT hGnRHR, but not of genetically modified hGnRHR species. The dominant-negative effect of the naturally occurring receptor mutants occurred only for the WT hGnRHR, which has intrinsic low maturation efficiency. The data suggest that this dominant negative effect accompanies the diminished plasma membrane expression as a recent evolutionary event MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 26 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000183926300061 L2 - PROTEIN-COUPLED RECEPTORS; RESONANCE ENERGY-TRANSFER; CELL-SURFACE EXPRESSION; DELTA-OPIOID RECEPTOR; HYPOGONADOTROPIC HYPOGONADISM; ENDOPLASMIC-RETICULUM; CYTOPLASMIC DOMAINS; SIGNAL-TRANSDUCTION; INTRACELLULAR LOOP; THERAPEUTIC TARGET SO - Journal of Clinical Endocrinology and Metabolism 2003 ;88(7):3360-3367 8571 UI - 6842 AU - Lee BO AU - Moyron-Quiroz J AU - Rangel-Moreno J AU - Kusser KL AU - Hartson L AU - Sprague F AU - Lund FE AU - Randall TD AD - Trudeau Inst Inc, Saranac Lake, NY 12983, USANatl Inst Resp Dis, Mexico City, DF, MexicoNatl Syst Res, Mexico City, DF, MexicoRandall, TD, Trudeau Inst Inc, 100 Algonquin Ave, Saranac Lake, NY 12983 USA TI - CD40, but not CD154, expression on B cells is necessary for optimal primary B cell responses AB - CD40 is an important costimulatory molecule for B cells as well as dendritic cells, monocytes, and other APCs. The ligand for CD40, CD154, is expressed on activated T cells, NK cells, mast cells, basophils, and even activated B cells. Although both CD40(-/-) and CD154(-/-) mice have impaired ability to isotype switch, form germinal centers, make memory B cells, and produce Ab, it is not entirely clear whether these defects are intrinsic to B cells, to other APCs, or to T cells. Using bone marrow chimeric mice, we investigated whether CD40 or CD154 must be expressed on B cells for optimal B cell responses in vivo. We demonstrate that CD40 expression on B cells is required for the generation of germinal centers, isotype switching, and sustained Ab production, even when other APCs express CD40. In contrast, the expression of CD154 on B cells is not required for the generation of germinal centers, isotype switching, or sustained Ab production. In fact, B cell responses are completely normal when CD154 expression is limited exclusively to Ag-specific T cells. These results suggest that the interaction of CD154 expressed by activated CD4 T cells with CD40 expressed by B cells is the primary pathway necessary to achieve B cell activation and differentiation and that CD154 expression on B cells does not noticeably facilitate B cell activation and differentiation MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 12 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000186767200011 L2 - CD40-CD40 LIGAND INTERACTION; X-LINKED IMMUNODEFICIENCY; GERMINAL CENTER FORMATION; HUMAN DENDRITIC CELLS; VASCULAR ENDOTHELIAL-CELLS; HYPER-IGM SYNDROME; T-CELLS; IN-VIVO; FUNCTIONAL CD40; IMMUNE-RESPONSES SO - Journal of Immunology 2003 ;171(11):5707-5717 8572 UI - 7001 AU - Lee DW AU - Jensen CM AU - Morales-Morales D AD - Univ Seoul, Dept Chem Engn, Seoul 130743, South KoreaUniv Hawaii, Dept Chem, Honolulu, HI 96822, USANatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoMorales-Morales, D, Univ Seoul, Dept Chem Engn, Seoul 130743, South Korea TI - Reactivity of iridium PCP pincer complexes toward CO and CO2 center dot crystal structures of IrH(k(2)-O2COH){C6H3-2,6-(CH2PBu2t)(2)} and IrH(C(O)OH){C6H3-2,6-(CH2PBu2t)2}center dot H2O AB - The reactivity of a series of PCP pincer complexes with carbon monoxide and carbon dioxide has been studied. The reactions of CO2 with PCP pincer iridium complexes provide the 16-electron complex Ir(eta(2)-CO2){C6H3-2,6-(CH2PBu2t)(2)} (2). Analogously, reactions with CO yield the 16-electron monocarbonyl compound Ir(CO){C6H3-2,6-(CH2PBu2t)(2)} (4). When IrH(OH)-{C6H3-2,6-(CH2PBu2t)(2)} (1b) is reacted with CO2, the hydrido bicarbonate complex IrH(kappa(2)- O2COH){C6H3-2,6-(CH2PBu2t)(2)} (3) is obtained. Analogously, when IrH2{C6H3-2,6-(CH2PBu2t)(2)} (1a) is reacted first with CO2 and then with H2O, the reaction affords the same species (3). Thus, compound 3 can be obtained irrespective of the order of addition of the substrates CO2 and H2O to 1a. Similarly, the reaction of 1b with CO affords the insertion product IrH(C(O)OH){C6H3-2,6-(CH2PBu2t)(2)} (5). The identities of 3 and 5 have been confirmed by single-crystal X-ray structure determinations MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000186401300022 L2 - CARBON-DIOXIDE; FORMIC-ACID; CATALYTIC DEHYDROGENATION; REDUCTION; RHODIUM; HYDROGENATION; DERIVATIVES; INSERTION; HYDRIDE; H-2 SO - Organometallics 2003 ;22(23):4744-4749 8573 UI - 5267 AU - Lefebvre R AU - Martin M AU - Atabek O AD - Univ Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, FranceUniv Paris 06, UFR Phys Fondamentale & Appl, F-75231 Paris, FranceBUAP, Fac Ciencias Comp, Puebla 72001, MexicoLefebvre, R, Univ Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, France TI - Collapse of transmissivity in a triple barrier AB - One generally expects that the transmissivity through a symmetric arrangement of barriers and wells should go to unity when the energy of the incident particle coincides with a resonance energy of the system. It has been noticed before that for a symmetric triple barrier, there are conditions that lead to a merging of the two lowest unit transmissivity peaks, accompanied by a collapse of the transmissivity profile. This feature has been interpreted as meaning that there is a reduction of the number of resonances under these conditions. We reanalyze this situation with the help of a model that involves the same number of bound and continuum states, but which possesses an analytic solution. Because the transition probability in this case is expressed entirely in terms of resonance parameters (positions and widths), it is possible to calculate with the expression derived from the model a profile that agrees completely with that calculated with the transfer matrix method. The resonance parameters are obtained from the poles of the transition amplitude. This shows that the merging of the peaks and the collapse of the transmissivity occurs without a reduction in the number of resonances MH - France MH - Mexico|Puebla PB - JERUSALEM: LASER PAGES PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0021-2148 UR - ISI:000222031600014 L2 - CONFIGURATION INTERACTION; WELL; HETEROSTRUCTURES SO - Israel Journal of Chemistry 2003 ;43(3-4):319-323 8574 UI - 7194 AU - Lekht EE AU - Munitsyn VA AU - Tolmachev AM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119992, RussiaRussian Acad Sci, Space Res Inst, Moscow 117810, RussiaRussian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, Pushchino Radio Astron Observ, Pushchino 142290, Moscow Oblast, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Long-term monitoring of the water-vapor maser in NGC 7538: 1981-1992 AB - We report the results of monitoring the H2O maser in NGC 7538, which is associated with a star-forming region. The observations were carried out on the 22-meter telescope of the Pushchino Radio Astronomy Observatory. Two intervals of long-term variability of the integrated flux that reflect the cyclic activity of the maser have been distinguished ( 1981-1992 and 1993-2003); the data for the earlier activity cycle, 1981-1992, have been analyzed. The period of the long-time-scale variations is about 1314 years. Flares of individual spectral features and of two groups of features with mean radial velocities of -60 and -46.6 km/s have been observed. The flares lasted from 0.3 to I year. The emission features observed during the 1984-1985 flare at radial velocities between -62 and -58 km/s probably form a spatially compact group of Spots (< 10(15) cm) in NGC 7538 IRS1. The triplet structure of the spectra can be traced. The observed anticorrelations and correlations of the fluxes of the triplet components suggest that the maser spots may be located either in a protoplanetary disk or in a high-velocity gaseous outflow. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000186130000006 L2 - H-II REGIONS; H2O MASER; MOLECULAR CLOUDS; VLA OBSERVATIONS; OH SOURCES; EMISSION; NGC7538; IRS-1 SO - Astronomy Reports 2003 ;47(10):838-847 8575 UI - 8550 AU - Lekht EE AU - Richards AMS AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119992, RussiaJodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Triplet spectra of H2O masers and protoplanetary disks AB - An analysis of the H2O maser emission associated with protoplanetary disks is presented. Triplet H2O spectra can be formed at certain stages in the evolution of Keplerian disks. The dependence of the mass of the central star in the Keplerian disk on the disk radius is derived. The calculations are based on the distribution of the water-vapor molecules (maser spots). In S140, the observed elongated maser spots (chains) with a smoothly varying line-of-sight velocity are interpreted as protoplanetary structures with a small intrinsic rotation. (C) 2003 MAIK "Nauka/Interperiodica" MH - United Kingdom MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000182754500006 L2 - VARIABILITY SO - Astronomy Reports 2003 ;47(4):326-332 8576 UI - 6619 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AU - Smith HM AD - UNAM, Ecol Lab, Unidad Biol Tecnol & Prototipos, FES Iztacala, Mexico City 54090, DF, MexicoDenison Univ, Dept Biol, Granville, OH 43023, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USAUniv Colorado, Dept Epo Biol, Boulder, CO 80309, USASmith, GR, UNAM, Ecol Lab, Unidad Biol Tecnol & Prototipos, FES Iztacala, Av Los Barrios S-N,Los Reyes Iztacala,Tialnepantl, Mexico City 54090, DF, Mexico TI - Ecology of Sceloporus undulatus speari (Sauria : Phrynosomatidae) from north-central Chihuahua, Mexico AB - We studied the ecology of a population of Sceloporus undulatus speari from the Transmontane Sand Dune region of northern Chihuahua, Mexico. Most of the individuals in our population used fence posts or yucca plants as perches and were only rarely seen on the ground. The majority of individuals in our population were seen in full sun, although a substantial number were in shade. Mean body temperature in our population was 35.2degreesC. Individuals first seen in full sun had lower T(b)s than individuals first seen in shade. Lizards using different microhabitats (e.g., yucca vs. fence post) had different body temperatures. Clutch size in our population was 5.23 eggs per clutch. Clutch size in our population was not statistically significantly related to female body size; however, the trend was for an increase in clutch size with SVL, with the smallest females having the smallest clutches. We found no evidence for sexual dimorphism in body size (SVL) in our population of S. undulatus, but males had larger heads. Coleopterans (particularly tenebrionids) and hymenopterans (particularly formicids) were the most important prey items MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000187513400014 L2 - SOUTH-CENTRAL COLORADO; LIZARD LIFE-HISTORIES; 2 POPULATIONS; GROWTH-RATES; WIDESPREAD LIZARD; MICROHABITAT USE; THERMAL BIOLOGY; FENCE LIZARD; ERYTHROCHEILUS; SIZE SO - Journal of Herpetology 2003 ;37(4):722-725 8577 UI - 7224 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AD - Univ Nebraska, Sch Biol Sci, Lincoln, NE 68588, USADenison Univ, Dept Biol, Granville, OH 43023, USAUNAM, Escuela Nacl Estud Professionales Iztacala, Ecol Lab, Unidad Biol Tecnol & Prototipos, Tlalnepantla 54090, Estado Mexico, MexicoSmith, GR, Univ Nebraska, Sch Biol Sci, Lincoln, NE 68588, USA TI - Ecology of Xenosaurus grandis agrenon, a knob-scaled lizard from Oaxaca, Mexico AB - We studied the ecology of a population of the mountain knob-scaled lizard, Xenosaurus grandis agrenon, from Oaxaca, Mexico. Males and females did not differ in body size (SVL), but males did have larger heads and hind limbs than females. Mean litter size was 3.2. Sex ratio did not differ from 1:1. All lizards were found associated with crevices. The size of the crevice (thickness and depth) increased with lizard SVL. Mean body temperature was 25.6degreesC. Body temperature was related to air and substrate temperature. Body temperature was influenced by the amount of cover, and the lizard's body position in its crevice but not by sex, month, vegetation type, or any crevice characteristics. We compare the ecology of this population to that of other Xenosaurus MH - Mexico|Estado De Mexico MH - USA PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000185910400028 L2 - RETREAT-SITE SELECTION; SCELOPORUS-UNDULATUS; SEXUAL DIMORPHISM; GENUS XENOSAURUS; THERMAL ECOLOGY SO - Journal of Herpetology 2003 ;37(1):192-196 8578 UI - 7515 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AD - Denison Univ, Dept Biol, Granville, OH 43023, USAUniv Nacl Autonoma Mexico, Ecol Lab, UBIPRO, FES Iztacala, Tlalnepantla, Estado Mexico, MexicoUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USASmith, GR, Denison Univ, Dept Biol, Granville, OH 43023, USA TI - Variation in growth and demography of a knob-scaled lizard (Xenosaurus newmanorum : Xenosauridae) from a seasonal tropical environment in Mexico AB - We studied growth and demography in a population of Xenosaurus newmanorum a lizard that lives in rock crevices in the tropical cloud forests of Mexico. Growth rates varied with season (faster in the wet season) and year (faster in 1995 and 1997, slower in 1996 and 1999). Males and females did not differ in growth rate. Proportion of reproductive females varied from year to year, with 1996 having the lowest proportion of reproductive females (32.5%) compared to the other years (all >75%). The age/size structure changed slightly among years, but did not differ between the wet and dry seasons. On average, the sex ratio was female-biased; however, the proportion of males in the population was greater in the dry season than in the wet season. Our results suggest that, like other lizards, growth and demographic characteristics of this population fluctuate with the proximate environment on both a seasonal and annual timescale MH - Mexico|Estado De Mexico MH - USA PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000185338600011 L2 - demography;growth;life history variation;Mexico;reproduction;tropical cloud forest;Xenosaurus newmanorum;LIFE-HISTORY; SOUTHEASTERN BRAZIL; SCELOPORUS-VIRGATUS; GENUS XENOSAURUS; MAINLAND ANOLE; CHLAMYDOSAURUS-KINGII; PHYSIOLOGICAL ECOLOGY; FOOD SUPPLEMENTATION; TROPIDURUS-TORQUATUS; REPRODUCTIVE ECOLOGY SO - Biotropica 2003 ;35(2):240-249 8579 UI - 8756 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AD - Denison Univ, Dept Biol, Granville, OH 43023, USAUNAM, Unidad Biol Tecnol & Protoipos, Ecol Lab, Tlalnepantla 54090, Edo De Mexico, MexicoUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USASmith, GR, Denison Univ, Dept Biol, Granville, OH 43023, USA TI - Diets of three species of knob-scaled lizards (genus Xenosaurus) from Mexico AB - We studied diets of 3 species of lizards in the genus Xenosaurus (X. grandis, X. newmanorum, X. platyceps) from Mexico. In general, the 3 species ate a diversity of prey, but the most important prey were insects (particularly Coleoptera and Orthoptera). Mammal remains and plant material were found in the diet of X. newmanorum MH - Mexico|Estado De Mexico MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 5 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000182043500018 L2 - SQUAMATA SO - Southwestern Naturalist 2003 ;48(1):119-122 8580 UI - 8920 AU - Lemus-Lopez J AU - az-Sanchez A AU - Ramirez-Angulo J AD - Natl Inst Res Astrophys Opt & Elect, Dept Elect, INAOE, Puebla 72840, MexicoNew Mexico State Univ, Klipsch Sch Elect & Comp Engn, Las Cruces, NM 88003, USALemus-Lopez, J, Natl Inst Res Astrophys Opt & Elect, Dept Elect, INAOE, Luis E Erro 1,Tonantzintla, Puebla 72840, Mexico TI - An analog median filter with fuzzy adaptation AB - The implementation of an analog median filter with a fuzzy adaptation mechanism is discussed. The adaptive median filter is based on transconductance comparators, which saturation current is used to adapt the local weight operator. All the simulations were made using a BSIM3 Level 49 model and 1.5 mum MOSIS technology parameters. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Puebla MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Physics, Applied U5 - J;Article AV - English IS - 0026-2714 UR - ISI:000181524200005 SO - Microelectronics Reliability 2003 ;43(2):203-207 8581 UI - 6717 AU - Lenhart AE AU - Mccall PJ AU - Ochoa M AU - Sorilla M AU - Kroeger A AD - Ctr Dis Control, Atlanta, GA 30333, USAIMSS Solidaridad, Veracruz, MexicoUniv Liverpool, Liverpool Sch Trop Med, Liverpool L3 5QA, Merseyside, England TI - The use of insecticide-treated curtains and larval growth inhibitors for dengue control in semiurban Veracruz, Mexico MH - United Kingdom MH - Mexico|Veracruz MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Meeting Abstract AV - English IS - 0035-9203 UR - ISI:000202964100031 SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2003 ;97(6):628-628 8582 UI - 7587 AU - Leon-Coret JL AU - Lennon JJ AU - Thomas CD AD - Univ Leeds, Sch Biol, Ctr Biodivers & Conservat, Leeds LS2 9JT, W Yorkshire, EnglandLeon-Coret, JL, Dept Ecol & Sistemat Terrestre, El Colegio Frontera Sur Carr Panamericana & Perif, San Cristobal de las Casas 29290, Chiapas, Mexico TI - Ecological dynamics of extinct species in empty habitat networks. 2. The role of host plant dynamics AB - This paper explores the relative effects of host plant dynamics and butterfly-related parameters on butterfly persistence. It considers an empty habitat network where a rare butterfly (Cupido minimus) became extinct in 1939 in part of its historical range in north Wales, UK. Surviving populations of the butterfly in southern Britain were visited to assess use of its host plant (Anthyllis vulneraria) in order to calibrate habitat suitability and carrying capacity in the empty network in north Wales. These data were used to deduce that only a portion ( similar to 19%) of the host plant network from north Wales was likely to be highly suitable for oviposition. Nonetheless, roughly 65,460 eggs (3273 adult equivalents) could be expected to be laid in north Wales, were the empty network to be populated at the same levels as observed on comparable plants in surviving populations elsewhere. Simulated metapopulations of C. minimus in the empty network revealed that time to extinction and patch occupancy were significantly influenced by carrying capacity, butterfly mean dispersal distance and environmental stochasticity, although for most reasonable parameter values, the model system persisted. Simulation outputs differed greatly when host plant dynamics was incorporated into the modelled butterfly dynamics. Cupido minimus usually went extinct when host plant were at low densities. In these simulations host plant dynamics appeared to be the most important determinant of the butterfly's regional extirpation. Modelling the outcome of a reintroduction programme to C. minimus variation at high quality locations, revealed that 65% of systems survived at least 100 years. Given the current amount of resources of the north Wales landscape, the persistence of C. minimus under a realistic reintroduction programme has a good chance of being successful, if carried out in conjunction with a host plant management programme MH - United Kingdom MH - Mexico|Chiapas PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 8 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000184955500002 L2 - METAPOPULATION STRUCTURE; CORRELATED ENVIRONMENTS; ANTHYLLIS-VULNERARIA; BRITISH BUTTERFLIES; POPULATION; MODEL; PERSISTENCE; CONSERVATION; LEPIDOPTERA; DISPERSAL SO - Oikos 2003 ;102(3):465-477 8583 UI - 7586 AU - Leon-Cortes JL AU - Lennon JJ AU - Thomas CD AD - Univ Leeds, Sch Biol, Ctr Biodivers & Conservat, Leeds LS2 9JT, W Yorkshire, EnglandLeon-Cortes, JL, Dept Ecol & Sistemat Terrestre, El Colegio Frontera Sur,Carr Panamericana & Perif, San Cristobal de las Casas 29290, Chiapas, Mexico TI - Ecological dynamics of extinct species in empty habitat networks. 1. The role of habitat pattern and quantity, stochasticity and dispersal AB - We examined a remnant host plant (Primula veris L.) habitat network that was last inhabited by the rare butterfly Hamearis lucina L. in north Wales in 1943, to assess the relative contribution of several spatial parameters to its regional extinction. We first examined relationships between P. veris characteristics and H. lucina eggs in surviving H. lucina populations, and used these to predict the suitability and potential carrying capacity of the habitat network in north Wales. This resulted in an estimate of roughly 4500 eggs (ca 227 adults). We developed a discrete space, discrete time metapopulation model to evaluate the relative contribution of dispersal distance, habitat and environmental stochasticity as possible causes of extinction. We simulated the potential persistence of the butterfly in the current network as well as in three artificial (historical and present) habitat networks that differed in the quantity (current and X3) and fragmentation of the habitat (current and aggregated). We identified that reduced habitat quantity and increased isolation would have increased the probability of regional extinction, in conjunction with environmental stochasticity and H. lucina's dispersal distance. This general trend did not change in a qualitative manner when we modified the ability of dispersing females to stay in, and find suitable habitats (by changing the size of the grid cells used in the model). Contrary to most metapopulation model predictions, system persistence declined with increasing migration rate, suggesting that the mortality of migrating individuals in fragmented landscapes may pose significant risks to system-wide persistence. Based on model predictions for the present landscape we argue that a major programme of habitat restoration would be required for a re-established metapopulation to persist for > 100 years MH - United Kingdom MH - Mexico|Chiapas PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 10 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000184955500001 L2 - METAPOPULATION DYNAMICS; ESTABLISHED POPULATIONS; SPATIAL AUTOCORRELATION; CORRELATED ENVIRONMENTS; BRITISH BUTTERFLIES; CONSERVATION; MIGRATION; MODELS; REINTRODUCTION; TRANSLOCATION SO - Oikos 2003 ;102(3):449-464 8584 UI - 8691 AU - Leon P AU - Sheen J AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoHarvard Univ, Sch Med, Dept Genet, Boston, MA, USAMassachusetts Gen Hosp, Dept Biol Mol, Boston, MA 02114, USASheen, J, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, Mexico TI - Sugar and hormone connections AB - Sugars modulate many vital processes that are also controlled by hormones during plant growth and development. Characterization of sugar-signalling mutants in Arabidopsis has unravelled a complex signalling network that links sugar responses to two plant stress hormones - abscisic acid and ethylene - in opposite ways. Recent molecular analyses have revealed direct, extensive glucose control of abscisic acid biosynthesis and signalling genes that partially antagonizes ethylene signalling during seedling development under light. Glucose and abscisic acid promote growth at low concentrations but act synergistically to inhibit growth at high concentrations. The effects of sugar and osmotic stress on morphogenesis and gene expression are distinct. The plasticity of plant growth and development are exemplified by the complex interplay of sugar and hormone signalling MH - Mexico|Morelos MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 115 U4 - Plant Sciences U5 - J;Editorial Material AV - English IS - 1360-1385 UR - ISI:000182195000005 L2 - ABSCISIC-ACID BIOSYNTHESIS; RESPONSIVE GENE-EXPRESSION; PROTEIN PHOSPHATASE 2C; SIGNAL-TRANSDUCTION; ARABIDOPSIS-THALIANA; 9-CIS-EPOXYCAROTENOID DIOXYGENASE; VEGETATIVE DEVELOPMENT; TRANSCRIPTION FACTOR; INSENSITIVE MUTANTS; HIGHER-PLANTS SO - Trends in Plant Science 2003 ;8(3):110-116 8585 UI - 7724 AU - Leonti M AU - Ramirez F AU - Sticher O AU - Heinrich M AD - ETH, Swiss Fed Inst Technol, Inst Pharmaceut Sci, Dept Appl Biosci, CH-8057 Zurich, SwitzerlandProyecto Sierra de Santa Marta, Xalapa 91000, Veracruz, MexicoUniv London, Sch Pharm, Ctr Pharmacognosy & Phytotherapy, London WC1N 1AX, EnglandLeonti, M, ETH, Swiss Fed Inst Technol, Inst Pharmaceut Sci, Dept Appl Biosci, Winterthurerstr 190, CH-8057 Zurich, Switzerland TI - Medicinal flora of the Popoluca, Mexico: A botanical systematical perspective AB - We studied the medicinal plants used by the Popoluca of the Sierra de Santa Marta (eastern Mexico). Using Moerman's method of regression analysis we determined which ethnomedically used taxa are over-represented in the Popolucan Pharmacopoeia (e.g., Asteraceae) and which are underrepresented (e.g., Orchidaceae). Moerman et al. (1999) found high correlation between the holarctic pharmacopoeias and assumed that apart from the relatedness of the northern floras a "global pattern of human knowledge" may account for this finding. Although the Popoluca dwell in a habitat dominated by a neotropical flora but intermixed with important holarctic elements, they include considerably fewer neotropical taxa in their pharmacopoeia as one would expect if the historical transmitted knowledge were influencing their selection. This finding confirms the theory stated by Moerman et al. However, the Popoluca include some neotropical taxa in their Pharmacopoeia and thus a moderate correlation exists between the Popolucan Pharmacopoeia and the neotropical Pharmacopoeia analysed by Moerman et al. We therefore conclude that apart from historically transmitted knowledge about specific taxa the "global pattern of human knowledge" addressed by Moerman et al. is largely based on "common selection criteria." MH - United Kingdom MH - Mexico|Veracruz MH - Switzerland PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000184666800005 L2 - traditional medicine;ethnobotany;ethnopharmacy;Isthmus of Tehuantepec;Macro-Mayan;medicinal plant selection;Mexico;Popoluca;regression analysis;NATIVE NORTH-AMERICA; ETHNOPHARMACOLOGY; PLANTS; VEGETABLES; SELECTION SO - Economic Botany 2003 ;57(2):218-230 8586 UI - 6452 AU - Leppanen T AU - Karttunen M AU - Kaski K AU - Barrio RA AD - Helsinki Univ Technol, Lab Computat Engn, FIN-02015 Espoo, FinlandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoLeppanen, T, Helsinki Univ Technol, Lab Computat Engn, POB 9203, FIN-02015 Espoo, Finland TI - Dimensionality effects in Turing pattern formation AB - The problem of rnorphogenesis and Turing instability axe revisited. from the point of view of dimensionality effects. First the linear analysis of a generic Turing model is elaborated to the case of multiple stationary states, which may lead the system to bistability. The difference between two- and three-dimensional pattern formation with respect to pattern selection and robustness is discussed. Preliminary results concerning the transition between quasi-two-dimensional and three-dimensional structures are presented and their relation to experimental results are addressed MH - Finland MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9792 UR - ISI:000188207400005 L2 - pattern formation;reaction-diffusion system;mathematical biology;REACTION-DIFFUSION SYSTEMS SO - International Journal of Modern Physics B 2003 ;17(29):5541-5553 8587 UI - 7268 AU - Leppanen T AU - Karttunen M AU - Barrio RA AU - Kaski K AD - Helsinki Univ Technol, Lab Computat Engn, FIN-02015 Helsinki, FinlandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoLeppanen, T, Helsinki Univ Technol, Lab Computat Engn, POB 9203, FIN-02015 Helsinki, Finland TI - The effect of noise on turing patterns AB - The effect of noise on pattern formation in Turing systems is studied. It is shown how robustness of 2D patterns and 3D structures against noise depends on the characteristics of the morphology. The effect of noise is of particular interest since Turing systems are often used for explaining biological patterns or structures, which have to be stable against noise MH - Finland MH - Mexico|Distrito Federal PB - KYOTO: PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9687 UR - ISI:000185853500038 L2 - SYSTEMS SO - Progress of Theoretical Physics Supplement 2003 ;(150):367-370 8588 UI - 6930 AU - Lercari D AU - Defeo O AD - UNDECIMAR, Fac Ciencias, Montevideo 11400, UruguayCINVESTAV, IPN, Unidad Merida, Merida 97310, Yucatan, MexicoLercari, D, UNDECIMAR, Fac Ciencias, Igua 4225, Montevideo 11400, Uruguay TI - Variation of a sandy beach macrobenthic community along a human-induced environmental gradient AB - Among the diverse sources of impact on sandy coasts, man-made freshwater flows and discharges of sewage effluents strongly modify environmental quality by changing salinity and nutrient regimes. However, sandy beaches, which occupy three-quarters of the world's shoreline, have received relatively little attention concerning consequences of this human-induced disturbance on the structure and dynamics of resident fauna. This paper reports the spatial effects of a freshwater canal discharge (Canal Andreoni) on the habitat and resident macrobenthos of an exposed sandy beach through a combined analysis of communities, populations and the surrounding habitat in three sites defined by previous studies as undisturbed (Barra), moderately disturbed (Coronilla) and grossly disturbed (Andreoni). Andreoni showed significant lower values of salinity, beach width, swash width and slope. Abundance, biomass, species richness, diversity and evenness significantly decreased towards the source of disturbance and were significantly and positively correlated with spatial variations in salinity. Multiple regressions explained up to 36% of the variability, often resulting in models composed by only one significant predictor, salinity, which can be considered as an aggregate variable that carries itself with different simultaneous effects in the nearshore-surf zone environment. The cirolanid isopod Excirolana armata generally dominated all sites in abundance, but at significantly lower values in the grossly disturbed site. The suspension feeders Donax hanleyanus and Emerita brasiliensis, which were well represented at Barra and Coronilla, did not occur in Andreoni, where insects were the most commonly represented after E. armata. In addition, the number of species and abundance of polychaetes tended to decrease towards the canal mouth, with the exception of punctual pulses of abundance of Scolelepis gaucha at Coronilla. In terms of biomass, the isopod E. armata dominated at Andreoni and Coronilla, whereas the suspension feeders D. hanleyanus and E. brasiliensis dominated at Barra. It is concluded that artificial freshwater discharges could significantly influence the distribution, abundance and community attributes of the biota of sandy beaches, and that further study of these ecosystems should include human activities as important factors affecting spatial and temporal trends. The combination of natural experiments together with macrocosm field and microcosm laboratory experiments is also suggested as a rich research vein for detecting the extent of disturbances in sandy beaches. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Yucatan MH - Uruguay PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000186659300003 L2 - sandy beach;macrofauna;intertidal;disturbance;Uruguay;CRAB EMERITA-BRASILIENSIS; TALPOIDA SAY CRUSTACEA; MOLE CRAB; PHYSICAL FACTORS; SALINITY; MACROINFAUNA; URUGUAY; POPULATIONS; DISCHARGE; PATTERNS SO - Estuarine Coastal and Shelf Science 2003 ;58():17-24 8589 UI - 8239 AU - Lerma S AU - Jesgarz S AU - Hess PO AU - Civitarese O AU - Reboiro M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaLerma, S, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Schematic model for QCD. I. Low energy meson states AB - A simple model for QCD is presented, which is able to reproduce the meson spectrum at low energy. The model is a Lipkin-type model for quarks coupled to gluons. The basic building blocks are quark-antiquark pairs coupled to a definite flavor and spin. These pairs are coupled to pairs of gluons with spin zero. The multiplicity problem, which dictates that a given experimental state can be described in various manners, is removed when a particle-mixing interaction is turned on. In this first paper of a series we concentrate on the discussion of meson states at low energy, the so-called zero temperature limit of the theory. The treatment of baryonic states is indicated, also MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000183382500061 L2 - RELATIVISTIC QUARK-MODEL; STRANGE-BARYON SPECTRUM; DOUBLE-BETA DECAY; FORCES; PHYSICS SO - Physical Review C 2003 ;67(5): 8590 UI - 9019 AU - Leung LW AU - Contreras RG AU - Flores-Maldonado C AU - Cereijido M AU - Rodriguez-Boulan E AD - Cornell Univ, Margaret M Dyson Vis Res Inst, Dept Ophthalmol, Weill Med Coll, New York, NY 10021, USACornell Univ, Dept Cell Biol, Weill Med Coll, New York, NY 10021, USACtr Res & Adv Studies, Dept Physiol, Mexico City 07000, DF, MexicoRodriguez-Boulan, E, Cornell Univ, Margaret M Dyson Vis Res Inst, Dept Ophthalmol, Weill Med Coll, Box 233,1300 York Ave, New York, NY 10021 USA TI - Inhibitors of glycosphingolipid biosynthesis reduce transepithelial electrical resistance in MDCK I and FRT cells AB - Madin-Darby canine kidney (MDCK) I and Fisher rat thyroid (FRT) cells exhibit transepithelial electrical resistance (TER) values in excess of 5,000 Omega.cm(2). When these cells were incubated in the presence of various inhibitors of sphingolipid biosynthesis, a >5-fold reduction of TER was observed without changes in the gate function for uncharged solutes or the fence function for apically applied fluorescent lipids. The localization of ZO-1 and occludin was not altered between control and inhibitor-treated cells, indicating that the tight junction was still intact. Furthermore, the complexity of tight junction strands, analyzed by freeze-fracture microscopy, was not reduced. Once the inhibitor was removed and the cells were allowed to synthesize sphingolipids, a gradual recovery of the TER was observed. Interestingly, these inhibitors did not attenuate the TER of MDCK II cells, a cell line that typically exhibits values below 800 Omega.cm(2). These results suggest that glycosphingolipids play a role in regulating the electrical properties of epithelial cells MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Cell Biology;Physiology U5 - J;Article AV - English IS - 0363-6143 UR - ISI:000181376500022 L2 - lipid microdomains;caveolin;claudin;occludin;TRANS-EPITHELIAL PERMEABILITY; TIGHT JUNCTION STRANDS; CANINE KIDNEY-CELLS; PROTEIN-KINASE-C; PLASMA-MEMBRANE; ANTIGANGLIOSIDE ANTIBODIES; SIGNAL-TRANSDUCTION; ANCHORED PROTEINS; LIPID RAFTS; SURFACE SO - American Journal of Physiology-Cell Physiology 2003 ;284(4):C1021-C1030 8591 UI - 6583 AU - Leuraud P AU - Taillandier L AU - guirre-Cruz L AU - Medioni J AU - Criniere E AU - Marie Y AU - Dutrillaux AM AU - Kujas M AU - Duprez A AU - Delattre JY AU - Poupon MF AU - Sanson M AD - Grp Hosp Pitie Salpetriere, AP HP, INSERM, U495,Lab Biol Interact Neurones Glie, F-75634 Paris, FranceFac Med, Lab Anatomopathol & Microchirurg Expt, Vandoeuvre Les Nancy, FranceGrp Hosp Pitie Salpetriere, AP HP, Unite Fonct Biostat, F-75634 Paris, FranceHop St Louis, AP HP, Ctr Invest Clin, Paris, FranceInst Curie, CNRS, F-75231 Paris, FranceGrp Hosp Pitie Salpetriere, AP HP, Lab Neuropathol R Escourolle, F-75634 Paris, FranceGrp Hosp Pitie Salpetriere, AP HP, Federat Neurol Mazarin, F-75634 Paris, FranceInst Nacl Neurol & Neurocirurgia, Unidad Invest Sistema Nervioso, Mexico City, DF, MexicoDelattre, JY, Hop La Pitie Salpetriere, Federat Neurol Mazarin, 47 Bd Hop, F-75013 Paris, France TI - Correlation between genetic alterations and growth of human malignant glioma xenografted in nude mice AB - In order to develop preclinical models of malignant astrocytomas and oligodendrogliomas, a series of 54 resected gliomas (37 from oligodendroglial lineage and 17 from astrocytic lineage) were xenografted subcutaneously into nude mice. Molecular alterations commonly observed in gliomas subtypes, including LOH 1p and 1q, LOH 19q, LOH 10p and 10q, LOH 9p, TP53 and PTEN mutations, EGFR amplification, CDKN2A homozygous deletion and telomerase reactivation were systematically screened in the original and xenografted tumours. In all, 23 gliomas grew in nude mice. The most anaplastic tumours were selected as shown by pathological and molecular studies of the original tumour as well as shorter survival in patients whose tumours were successfully grafted. Comparison between the two growth profiles showed that 10q LOH and EGFR amplification gave a tumorigenic advantage. With a few exceptions, the genetic pattern was remarkably stable before and after growth in nude mice. These results suggest that subcutaneous xenografts are useful and reproducible models to analyse the molecular profile of malignant astrocytoma and oligodendroglioma. This represents the first step to improve our understanding of the correlations between molecular alterations and response to standard or experimental therapies MH - France MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 4 U4 - Oncology U5 - J;Article AV - English IS - 0007-0920 UR - ISI:000188093600026 L2 - oligodendroglioma;xenograft;EGFR;preclinical models;FACTOR RECEPTOR GENE; CANCER XENOGRAFTS; CELL-LINE; GLIOBLASTOMA XENOGRAFT; COLORECTAL-CANCER; AMPLIFICATION; OLIGODENDROGLIOMAS; PROGRESSION; SURVIVAL; ASTROCYTOMAS SO - British Journal of Cancer 2003 ;89(12):2327-2332 8592 UI - 8576 AU - Levresse G AU - Gonzalez-Partida E AU - Tritlla J AU - Camprubi A AU - Cienfuegos-Alvarado E AU - Morales-Puente P AD - UNAM, Ctr Geociencias, Santiago De Queretaro 76230, SpainUniv Nacl Autonoma Mexico, Inst Geol, Lab Univ Geoquim Isotop, Mexico City 04510, DF, MexicoGonzalez-Partida, E, UNAM, Ctr Geociencias, Campus Juriquillam,Carr 57 Qro SLP Km 15-5, Santiago De Queretaro 76230, Mexico TI - Fluid characteristics of the world-class, carbonate-hosted Las Cuevas fluorite deposit (San Luis Potosi, Mexico) AB - Las Cuevas is a world-class high-grade fluorite district that accounts for over 7% of the world total fluorite production. This district is mainly hosted in the Cretaceous limestones of the El Doctor Formation, and is in fault contact with Tertiary rhyolites. This preliminary study is focused on the "G" orebody, a mass of fine-grained fluorite, with abundant cavities lined up by fluorite, sometimes stalactitic, late calcite and clays. Fluid inclusions in cavity filling minerals have salinities up to 0.18 wt.% NaCl eq. with homogenization temperatures ranging from 60 to 110 degreesC, with the T-h decreasing consistently from early cavity filling fluorite to late calcite. delta(18)C and delta(13)C Values suggest that both an organic matter maturation and a decarbonation process might have occurred during the formation of the deposit. All the characteristics of the deposit suggest an MVT-related origin rather than a magmatic-hydrothermal one as previously proposed by other authors. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800098 L2 - fluorite;hydrothermal solutions;oxygen-carbon isotopes;MVT;Mexico SO - Journal of Geochemical Exploration 2003 ;78-9():537-543 8593 UI - 7310 AU - Levy F AU - Melo AI AU - Galef G AU - Madden M AU - Fleming AS AD - Univ Toronto, Dept Psychol, Mississauga, ON L5L 1C6, CanadaUAT, CINVESTAV, Ctr Invest Reprod Anim, Tlaxcala 90000, Tlax, MexicoMcMaster Univ, Dept Psychol, Hamilton, ON L8S 4K1, CanadaUniv Tours, CNRS, UMR 6073,INRA, Equipe Comportement,Stn PRC, F-37380 Nouzilly, FranceLevy, F, Univ Toronto, Dept Psychol, Mississauga, ON L5L 1C6, Canada TI - Complete maternal deprivation affects social but not spatial learning in adult rats AB - The effects of maternal deprivation on learning of social and spatial tasks were investigated in female adult rats. Pups were reared artificially and received "lickinglike" tactile stimulation (AR animals) or were recited with their mothers (MR animals). In adulthood, subjects were tested on paradigms of spatial learning and on paradigms involving learning of social cues. Results showed that maternal deprivation did not affect performance on spatial learning, but it did impair performance on the three social learning tasks. The AR animals made)to distinction between a new and a previously presented juvenile conspecific. AR animals also responded less rapidly than MR animals at test for maternal behavior 2 weeks after a postpartum experience with pups. Finally, AR animals did not develop a preference,for a food previously eaten by a familiar conspecific whereas MR animals did. This study indicates that animals reared without mother and siblings show no deficits in spatial tasks while showing consistent deficits in learning involving social interactions. (C) 2003 Wiley Periodicals, Inc MH - Canada MH - France MH - Mexico|Tlaxcala PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 14 U4 - Developmental Biology;Psychology U5 - J;Article AV - English IS - 0012-1630 UR - ISI:000185871000002 L2 - maternal deprivation;social learning;spatial learning;artificial;rearing;maternal;FEMALE RATS; RETROGRADE-AMNESIA; NUCLEUS-ACCUMBENS; POSTPARTUM RATS; HIPPOCAMPAL-LESIONS; LATENT INHIBITION; RECEPTOR LEVELS; RHESUS-MONKEYS; OLFACTORY-BULB; MEMORY SO - Developmental Psychobiology 2003 ;43(3):177-191 8594 UI - 9040 AU - Leznov A AU - Mostovoy J AD - Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, MexicoInst High Energy Phys, Protvino 142280, Moscow Region, RussiaJoint Inst Nucl Res Dubna, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, RussiaUniv Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62210, Morelos, MexicoLeznov, A, Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, Mexico TI - Classical dynamics in deformed spaces AB - We consider a 3-parametric linear deformation of the Poisson brackets in classical mechanics. This deformation can be thought of as the classical limit of dynamics in the so-called quantized spaces. Our main result is a description of the motion of a particle in the corresponding Kepler-Coulomb problem MH - Mexico|Morelos MH - Russia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000181236200019 SO - Journal of Physics A-Mathematical and General 2003 ;36(5):1439-1449 8595 UI - 8610 AU - Leznov AN AU - Escobedo-Alatorre J AU - Torres-Cordoba R AD - Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, MexicoInst High Energy Phys, Protvino 142280, Moscow Region, RussiaJoint Inst Nucl Res, Bogoliubov Lab Theor Phys, Dubna 141980, Moscow Region, RussiaLeznov, AN, Univ Autonoma Estado Morelos, CCICAp, Cuernavaca, Morelos, Mexico TI - Fine structure of the discrete transformation for multicomponent integrable systems AB - It is shown that in the case of multicomponent integrable systems connected with algebras A(n), the discrete transformation T possesses the. ne structure and can be represented in the form T = Pi T-i(li), where T-i are n commuting basis discrete transformations and l(i) are arbitrary natural numbers. All the calculations are conducted in detail for the case of a 3-wave interacting system MH - Mexico|Morelos MH - Russia PB - LULEA: NORBERT EULER RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 1402-9251 UR - ISI:000182520700007 SO - Journal of Nonlinear Mathematical Physics 2003 ;10(2):243-251 8596 UI - 8665 AU - Leznov AN AU - Torres-Cordoba R AD - Univ Autonoma Esatado Morelos, CCICap, Mexico City, DF, MexicoInst High Energy Phys, Protvino 142284, Moscow Region, RussiaJoint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, RussiaLeznov, AN, Univ Autonoma Esatado Morelos, CCICap, Mexico City, DF, Mexico TI - Discrete transformation for the matrix three-wave problem in three dimensional space AB - Discrete transformation for three-wave problems is constructed in explicit form. Generalization of this system on the matrix case in three dimensional space together with corresponding discrete transformation is presented also. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000182400100029 SO - Journal of Mathematical Physics 2003 ;44(5):2342-2352 8597 UI - 7509 AU - Li XL AU - Neumann-Lara V AU - Rivera-Campo E AD - Nankai Univ, Ctr Combinator, Nankai, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City, DF, MexicoLi, XL, Nankai Univ, Ctr Combinator, Nankai, Peoples R China TI - On a tree graph defined by a set of cycles AB - For a set C of cycles of a connected graph G we define T(G,C) as the graph with one vertex for each spanning tree of G, in which two trees R and S are adjacent if R boolean OR S contains exactly one cycle and this cycle lies in C. We give necessary conditions and sufficient conditions for T(G,C) to be connected. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000185241100022 L2 - tree graph;cycle space;Delta*-dense;SPANNING-TREES SO - Discrete Mathematics 2003 ;271(1-3):303-310 8598 UI - 6754 AU - Li YP AU - Hernandez-Martinez S AU - Unnithan GC AU - Feyereisen R AU - Noriega FG AD - Univ Arizona, Dept Biochem & Mol Biophys, Tucson, AZ 85721, USAUniv Arizona, Ctr Insect Sci, Tucson, AZ 85721, USAInst Nacl Salud Publ, Ctr Invest Sobre Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoUniv Arizona, Dept Entomol, Tucson, AZ 85721, USANoriega, FG, Univ Arizona, Dept Biochem & Mol Biophys, Tucson, AZ 85721 USA TI - Activity of the corpora allata of adult female Aedes aegypti: effects of mating and feeding AB - The synthesis of juvenile hormone III (JH III) by the isolated corpora allata. (CA) of Aedes aegypti adult female was studied using an in vitro radiochemical assay. We dissected the corpora allata-corpora cardiaca (CA-CC) complex attached to a piece of aorta. The complex was left connected to the intact head capsule to facilitate the visualization and transfer of the glands. A linear increase in the cumulative amount of biosynthesized JH III was found for at least the first 6 h of incubation; approximately 45% of the synthesized JH III was present in the medium. There was a dependence of JH III synthesis on exogenous methionine supply. Using reversed phase high performance liquid chromatography two major labeled products biosynthesized by the CA were separated. They co-migrated with JH III and methyl farnesoate (MF). The identity of the biosynthesized JH III was confirmed by gas chromatography-mass spectrometry. JH III synthesis was only 2.0 fmol/pair gland/h immediately after adult emergence, but increased to 32.6 fmol/pair gland/h 18 h later in sugar-fed females. Two days after emergence, the CA biosynthetic activity slowly started to decrease, and reached values of around 5.3 fmol/pair gland/h by one week after emergence. Synthesis of JH was similar from either sugar-fed females mated or unmated. A blood meal resulted in a decrease of JH III synthesis in CA from mated females by 12 It after feeding and from virgin females by 24 It after feeding. JH III biosynthesis remained low for at least 96 h in mated females, but was back to higher levels 72 h after feeding in virgin females. Rates of JH III biosynthesis closely reflected the hemolymph levels of JH III both after emergence and after a blood meal described by Shapiro et al. (1986). The activity of the CA in Aedes aegypti females seems to be regulated by developmental changes and nutritional signals, and to be independent of mating stimulus. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0965-1748 UR - ISI:000187036800015 L2 - Aedes aegypti;juvenile hormone;corpora allata;mating;blood-feeding;JUVENILE HORMONE-III; MANDUCA-SEXTA ALLATOTROPIN; FARNESOIC ACID; BIOSYNTHESIS INVITRO; BLATTELLA-GERMANICA; MESSENGER-RNA; CULEX-PIPIENS; MOSQUITO; STARVATION; DIPTERA SO - Insect Biochemistry and Molecular Biology 2003 ;33(12):1307-1315 8599 UI - 8925 AU - Li Z AU - Samuel AM AU - Samuel FH AU - Ravindran C AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaRyerson Univ, Dept Mech Aerosp & Ind Engn, Toronto, ON M5B 2K3, CanadaCorp Nemak, Res & Dev, Garza Garcia 66221, NL, MexicoLi, Z, Univ Quebec, Dept Appl Sci, 555 Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada TI - Effect of alloying elements on the segregation and dissolution of CuAl2 phase in Al-Si-Cu 319 alloys AB - The hypoeutectic 319 aluminum alloy (Al-7% Si-3.5%Cu) was used in the present study to investigate the effect of diverse alloying elements on the dissolution of the copper phase (CuAl2) during solution heat treatment. Elements such as Sr, Fe and P were added to the base alloy individually and in various combinations. The cooling curves of these alloys were obtained by solidifying the alloy melts in a preheated graphite mold (600 degreesC, cooling rate similar to0.8degreesC/s). From these the first derivate curves were plotted and used to determine the effect of the additives on the precipitation temperature of the Al-CuAl2 eutectic reaction. Microstructural examination was carried out using optical microscopy, image analysis, and electron probe microanalysis (EPMA), with energy dispersive X-ray (EDX) and wavelength dispersive spectroscopic (WDS) analysis facilities. Samples from different alloys were solution heat treated at 505degreesC for various times up to 100 hours. The results explicitly reveal that solution heat treatment plays a critical role on the dissolution of the CuAl2 phase. It is found that Sr leads to segregation of the CuAl2 phase away from the Al-Si eutectic regions, which slows down its dissolution during solution heat treatment. The beta-Al5FeSi phase platelets act as preferred precipitation sites for the copper phase and hence lessen the degree of segregation. Thus, addition of Fe can accelerate the copper phase dissolution. However, phosphorus addition has a negative effect on CuAl2 dissolution due to (i) its solubility in the CuAl2 phase particles, and (ii) the formation of (Al, P) O-2 oxide particles which act as nucleation sites for the precipitation of the block-like CuAl2 phase. It retards the complete dissolution of this copper phase even after 100 hr solution treatment. In the case when phosphorus and iron are added together, the negative effect of phosphorus can be neutralized to some extent. (C) 2003 Kluwer Academic Publishers MH - Canada MH - Mexico|Nuevo Leon PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000181626100014 L2 - SOLUTION HEAT-TREATMENT SO - Journal of Materials Science 2003 ;38(6):1203-1218 8600 UI - 6786 AU - Liao XF AU - Chen GR AU - Sanchez EN AD - Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400030, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Hong Kong, Peoples R ChinaCINVESTAV, Unidad Guadalajara, Guadalajara 45090, Jalisco, MexicoLiao, XF, Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400030, Peoples R China TI - Delay-dependent exponential stability analysis of delayed neural networks: an LMI approach (vol 16, pg 1401, 2003) MH - Mexico|Jalisco MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Artificial Intelligence U5 - J;Correction AV - English IS - 0893-6080 UR - ISI:000186862100001 SO - Neural Networks 2003 ;16(10):1401-1402 8601 UI - 8942 AU - Licea-Claverie A AU - Rogel-Hernandez E AU - Lopez-Sanchez JA AU - Castillo-Arambula LA AU - Cornejo-Bravo JM AU - Arndt KF AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoUniv Autonoma Baja California, Fac Ciencias Quim & Ingn, Tijuana 22300, BC, MexicoTech Univ Dresden, Inst Phys Chem & Electrochem, D-01062 Dresden, GermanyLicea-Claverie, A, POB 431461, San Ysidro, CA 92143, USA TI - A facile synthesis route for carboxyaryl-methacrylates: a way to obtain aromatic polyelectrolytes AB - This paper describes a flexible synthetic route for the preparation of the following methacrylic acid derivative monomers with aromatic spacers, including salicylic acid derivatives, in high yields: 2-methacryloyloxybenzoic acid (2-MBA), methyl-2-methacryloyloxybenzoate (M2-MB), 3-methacryloyloxybenzoic acid (3-MBA), methyl-3-methacryloyloxybenzoate (M3-MB), 4-methacryloyloxybenzoic acid (4-MBA), methyl-4-methacryloyloxybenzoate (M4-MB), 4-methacryloyloxy phenyl acetic acid (4-MPAA), methyl-4-methacryloyloxyphenylacetate (M4-MPA) and methyl-4methacryloyloxyphenylpropionate (M4-MPP). The preparation of the respective aromatic polymers from these monomers by solution free-radical polymerization and their characterization are also described. The position of the substituent in the aromatic spacer ring plays a very important role in the properties of the polymers prepared. While for methyl-ester substitution the glass transition temperature increases from ortho to para isomers, in the case of carboxylic acid substitution this value decreases from ortho to para isomers. The four polymers prepared with free acid groups are hydrophobic polyelectrolytes, as shown by their behavior in aqueous NaCl solutions at different pH values, making them potential candidates for new pH sensitive materials MH - Germany MH - Mexico|Baja California MH - USA PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 1385-772X UR - ISI:000181614400007 L2 - polyelectrolytes;polyarylmethacrylates;pH-sensitive polymers;salicylic acid derivatives;HYDROPHOBIC POLYELECTROLYTES; ACID; POLYMERS SO - Designed Monomers and Polymers 2003 ;6(1):67-80 8602 UI - 8267 AU - Licona P AU - Nava KE AU - Chavez JR AU - Villafan H AU - Malissen M AU - Soldevila G AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoCNRS Marseille Luminy, INSERM, F-13288 Marseille, France TI - Dissecting the signaling pathways induced after conditional activation of TCR zeta, CD3 epsilon and CD4 with chemical inducers of dimerization MH - France MH - Mexico|Distrito Federal PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000182367001034 SO - Faseb Journal 2003 ;17(7):C223-C223 8603 UI - 7476 AU - Liddle AR AU - Urena-Lopez LA AD - Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoLiddle, AR, Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, England TI - Curvaton reheating: An application to braneworld inflation AB - The curvaton was introduced recently as a distinct inflationary mechanism for generating adiabatic density perturbations. Implicit in that scenario is that the curvaton offers a new mechanism for reheating after inflation, as it is a form of energy density not diluted by the inflationary expansion. We consider curvaton reheating in the context of a braneworld inflation model, steep inflation, which features a novel use of the braneworld to give a new mechanism for ending inflation. The original steep inflation model featured reheating by gravitational particle production, but the inefficiency of that process causes observational difficulties. We demonstrate here that the phenomenology of steep inflation is much improved by curvaton reheating MH - United Kingdom MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185235500029 L2 - ELECTROWEAK BARYOGENESIS; COSMOLOGY; PERTURBATIONS; UNIVERSE SO - Physical Review D 2003 ;68(4): 8604 UI - 6847 AU - Liggett PE AU - Chaudhry N AU - Tom D AU - Quiroz-Mercado H AU - Alfaro D AU - Jablon E AD - Cornell Univ, New York Hosp, New York, NY, USAYale Univ, New Haven, CT 06520, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoCharleston Retina Associates, Charleston, SC, USA TI - ICG enhanced-transpupillary thermotherapy for choroidal neovascularization in AMD MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184606801721 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U413-U413 8605 UI - 8457 AU - Lin X AU - Stojmenovic I AD - Univ Ottawa, Dept Comp Sci, SITE, Ottawa, ON K1N 6N5, CanadaCagnos Inc, Ottawa, ON K1P 5H9, CanadaUNAM, DISCA, IIMAS, Mexico City 04510, DF, MexicoStojmenovic, I, Univ Ottawa, Dept Comp Sci, SITE, 550 Cumberland St, Ottawa, ON K1N 6N5, Canada TI - Location-based localized alternate, disjoint and multi-path routing algorithms for wireless networks AB - Recently, several fully distributed (localized) location-based routing protocols for a mobile ad hoc network were reported in literature. They are variations of directional (DIR), geographic distance (GEDIR) or progress-based (MFR) routing methods. In DIR methods, each node A (the source or intermediate node) transmits a message m to several neighbors whose direction is closest to the direction of D. In MFR (most forward progress within radius), and GEDIR (GEographic DIstance Routing) methods, when node A wants to send m to node D, it forwards m to its neighbor C whose projection or distance (respectively) is closest to D among all neighbors of A. The same procedure is repeated until D, if possible, is eventually reached. In this paper, we introduce three variants of multiple path c-GEDIR, c-DIR and c-MFR methods, in which m is initially sent to c best neighbors according to corresponding criterion, and afterwards, on intermediate nodes, it is forwarded to only the best neighbor. In the original c-path method, only the first received copy at intermediate nodes is forwarded to the best neighbor. In the alternate c-path method, the ith received copy is forwarded to ith best neighbor, according to the selected criterion. In the disjoint c-path method, each intermediate node, upon receiving the message, will forward it to its best neighbor among those who never received the message (thus, in effect, the methods attempts to create c disjoint paths). The simulation experiments with random graphs show that disjoint multiple path methods provide high success rates, and small hop counts for small values of c. They also have reduced flooding rates compared to the best existing multiple-path methods and/or methods that require memorizing past traffic, such as recently proposed LAR2, f-GEDIR, and DFS based routing, and can serve as a basis for scalable QoS routing in wireless networks. (C) 2002 Elsevier Science (USA). All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0743-7315 UR - ISI:000182879300004 L2 - routing;wireless networks;distributed algorithms;mobile computing;shortest path;GUARANTEED DELIVERY SO - Journal of Parallel and Distributed Computing 2003 ;63(1):22-32 8606 UI - 6871 AU - Lind DL AU - Choudhry S AU - Ung N AU - Ziv E AU - Avila PC AU - Salari K AU - Ha C AU - Lovins EG AU - Coyle NE AU - Nazario S AU - Casal J AU - Torres A AU - Rodriguez-Santana JR AU - Matallana H AU - Lilly CM AU - Salas J AU - Selman M AU - Boushey HA AU - Weiss ST AU - Chapela R AU - Ford JG AU - Rodriguez-Cintron W AU - Silverman EK AU - Sheppard D AU - Kwok PY AU - Burchard EG AD - Univ Calif San Francisco, San Francisco, CA 94143, USASan Francisco Gen Hosp, Lung Biol Ctr, San Francisco, CA 94110, USAUniv Puerto Rico, Sch Med, San Juan Vet Affairs Med Ctr, San Juan, PR 00936, USACardiovasc Ctr Puerto Rico, Div Pediat Pulmonol, Pediat Pulm Program San Juan, San Juan, PR, USABrigham & Womens Hosp, Boston, MA 02115, USAHarlem Hosp Med Ctr, Harlem Lung Ctr, New York, NY, USAColumbia Univ, New York, NY 10027, USAINER, Mexico City, DF, MexicoBurchard, EG, Univ Calif San Francisco, San Francisco, CA 94143, USA TI - ADAM33 is not associated with asthma in Puerto Rican or Mexican populations AB - A recent study identified the ADAM33 gene as a promising candidate contributing to asthma. In Puerto Rican and Mexican populations, we have genotyped six single nucleotide polymorphisms (SNPs) that were used in the Genetics of Asthma in Latino Americans Study. We chose to study these two populations because in the United States, Puerto Ricans have the highest asthma prevalence, morbidity, and mortality and Mexicans the lowest. We used the transmission disequilibrium test to analyze associations between the ADAM33 gene variants and asthma, asthma severity, bronchodilator responsiveness, and total IgE levels using single SNPs, two to six SNP combinations, and specific haplotypes in 583 trios (proband with asthma and both biological parents). We also genotyped matched control samples to allow case-control analyses. None of the transmission disequilibrium test or case-control results showed significant association in either population. We found no evidence for association of single SNPs with asthma severity, bronchodilator response, or IgE levels in Mexicans or in the combined population. Two SNPs showed a modest association in Puerto Ricans, insignificant when the number of comparisons was taken into account. We conclude that the ADAM33 gene is not an important risk factor for asthma or for asthma-associated phenotypes in Mexicans or in Puerto Ricans MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 50 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000186804300013 L2 - genetics;asthma;Latino populations;ADAM33;TESTS; GENE; HYPERRESPONSIVENESS; HISPANICS SO - American Journal of Respiratory and Critical Care Medicine 2003 ;168(11):1312-1316 8607 UI - 6984 AU - Lind DL AU - Choudhry S AU - Reinhart A AU - Ziv E AU - Avila PC AU - Nazario S AU - Casal J AU - Torres A AU - Rodriguez-Santana JR AU - Salas J AU - Selman M AU - Chapela R AU - Rodriguez-Cintron W AU - Weiss ST AU - Silverman EK AU - Ford JG AU - Sheppard D AU - Kwok PY AU - Burchard EG AD - UCSF, Inst Cardiovasc Res, San Francisco, CA, USASFGH, Lung Biol Ctr, San Francisco, CA, USAUniv Calif San Francisco, Dept Med, San Francisco, CA, USAUniv Puerto Rico, Sch Med, San Juan VAMC, San Juan, PR 00936, USAPediat Pulm Program Puerto Rico, San Juan, PR, USAINER, Mexico City, DF, MexicoBrigham & Womens Hosp, Boston, MA, USAHarlem Hosp, Harlem Lung Ctr, New York, NY, USAColumbia Univ, New York, NY 10027, USA TI - TGF beta 1-SNP discovery and evaluation as a candidate gene for asthma in Puerto Rican and Mexican asthmatics MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599702084 SO - American Journal of Human Genetics 2003 ;73(5):524-524 8608 UI - 8939 AU - Lindig-Cisneros R AU - Desmond J AU - Boyer KE AU - Zedler JB AD - Univ Wisconsin, Dept Bot, Madison, WI 53706, USAUniv Wisconsin, Arboretum, Madison, WI 53706, USAUniv Calif Los Angeles, Dept Organism Biol Ecol & Evolut, Los Angeles, CA 90095, USACalif Sci Ctr, Los Angeles, CA 90037, USAUniv Michoacana San Nicolas Hidalgo, Inst Invest Sobre Recursos Nat, Morelia 58041, Michoacan, MexicoZedler, JB, Univ Wisconsin, Dept Bot, Madison, WI 53706, USA TI - Wetland restoration thresholds: Can a degradation transition be reversed with increased effort? AB - Previous attempts to reverse the degradation of a coastal wetland and restore nesting habitat for an endangered bird showed that adding nitrogen could temporarily increase the height of Spartina foliosa, but not produce self-sustaining tall canopies. We asked if increased effort (up to five years of N fertilization) would shift canopy attributes across the hypothesized threshold. Thirty plots Were treated with 0-5 yr of urea addition, and all were followed for 5 yr. Canopies were robust while urea was being added, but Spartina reverted to short stature soon after fertilization ended, supporting R. J. Hobbs and D. A. Norton's concept of an irreversible transition. However, specific outcomes depended on the choice of response variable (six comparisons), the choice of reference data (initial conditions, same-year data, and pooled data), and the choice of statistical design (repeated measures vs. complete design), indicating the need to assess experiments thoroughly before making strong recommendations for management MH - Mexico|Michoacan MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 1051-0761 UR - ISI:000181663700014 L2 - alternative-state theory;cordgrass;fertilization effects;irreversible transition;management actions;nitrogen addition;restoration outcome;evaluating;restoration threshold;Spartina foliosa;statistical design;wetland restoration;coastal;RESOURCE-ISLAND SOILS; SALT-MARSH VEGETATION; SPARTINA-ALTERNIFLORA; GIANT CACTUS; NITROGEN; ECOLOGY; PROGRESS; SURVIVAL; DYNAMICS; REMNANT SO - Ecological Applications 2003 ;13(1):193-205 8609 UI - 8326 AU - Lindsley D AU - Gallant J AU - Guarneros G AD - Univ Washington, Dept Genome Sci, Seattle, WA 98105, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoGallant, J, Univ Washington, Dept Genome Sci, Box 357730, Seattle, WA 98105 USA TI - Ribosome bypassing elicited by tRNA depletion AB - Ribosome bypassing refers to the ability of the ribosome::peptidyl-tRNA complex to slide down the message without translation to a site several or dozens of nucleotides downstream and resume protein chain elongation there. The product is an isoform of a protein with a 'coding' gap corresponding to the region of the message which was bypassed. Previous work showed that ribosome bypassing was strongly stimulated at 'hungry' codons calling for a tRNA whose aminoacylation was limited. We have now used the 'minigene' phenomenon to ascertain whether depletion of the pool of specific isoacceptors has a similar effect. High level expression of plasmid-borne minigenes results in the sequestration as peptidyl-tRNA of tRNA cognate to the last triplet of the minigene, thereby limiting protein synthesis for lack of the tRNA in question. We find that induction of a minigene ending in AUA stimulates bypassing at an AUA codon, but not in a control sequence with AGA at the test position; induction of a minigene ending in AGA stimulates bypassing at the latter but not the former. Induction of the AUA minigene also stimulates both leftward and rightward frameshifting at 'shifty' sequences containing an AUA codon. The normal, background frequency of bypassing at an AUA codon is markedly reduced by increasing the cellular level of the tRNA which reads the codon. Thus, the frequency of bypassing can be increased or decreased by lowering or raising the concentration of a relevant tRNA isoacceptor. These observations suggest that the occurrence of ribosome bypassing reflects the length of the pause at a given codon MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000183195000010 L2 - PEPTIDYL-TRANSFER-RNA; OPEN READING FRAMES; PROTEIN-SYNTHESIS; ESCHERICHIA-COLI; MINIGENE EXPRESSION; HUNGRY CODONS; INHIBITION; GROWTH; TRANSLATION; MECHANISM SO - Molecular Microbiology 2003 ;48(5):1267-1274 8610 UI - 7097 AU - Linhart O AU - Rodina M AU - Gela D AU - Kocour M AU - Rodriguez M AD - Univ S Bohemia, Acad Sci Czech Republ, Res Inst Fish Culture & Hydrobiol, Inst Anim Physiol & Genet,Joint Lab Genet Physiol, Vodnany 38925, Czech RepublicAutonomus Univ Metropolitane, Mexico City 04960, DF, MexicoLinhart, O, Univ S Bohemia, Acad Sci Czech Republ, Res Inst Fish Culture & Hydrobiol, Inst Anim Physiol & Genet,Joint Lab Genet Physiol, Vodnany 38925, Czech Republic TI - Improvement of common carp artificial reproduction using enzyme for elimination of egg stickiness AB - This study summarizes optimization of techniques for common carp artificial propagation including improvements of activation solution (AS), the process of insemination, and elimination of egg stickiness. The optimum gamete ratio for good fertilization and hatching rate ranged from 8490 to 23 672 spermatozoa per egg, when dechlorinated tap water was used. Optimal ratio between eggs (weight in g) and AS (in ml) was defined as 1: 1 to 1:2. Different concentrations of AS such as NaCl from 0 to 34 mM (0 68 mOsmol kg(-1).) did not change fertilization and hatching rates. An AS adopted for carp spermatozoa (45 mM NaCl, 5 mM KCl, 30 mM Tris-HCl, pH 8) was compared with other saline AS; only the 51 mM (102 mOsmol kg(-1)) NaCl solution decreased fertilization and hatching rate. The AS containing 20 mM Tris-HCl at pH 9 increased fertilization and hatching rates compared to dechlorinated tap water of pH 7 or to AS of pH 6 and 7. Adhesiveness from the eggs was successfully removed by incubation in Alcalase DX (PLN 04715) using two successive steps with different enzyme concentrations. The first step with an enzyme concentration of 2 ml l(-1) was applied from 8 to 20 min after fertilization. Later in a second step, the best time for application of alcalase enzyme at a concentration of 20 ml l(-1) was for 45 and 60 s at 20 min after fertilization leading to fertilization and hatching rates of 80-87%. The a-Chymotrypsin (EC 3.4.21.1. Merck) was also found effective for elimination of stickiness. Results with a-Chymotrypsin enzyme indicate that the response to success in elimination of stickiness is highly variable mainly due to differences in the environment, quality of water and carp strains. (C) 2003 Editions scientifiques et medicales Elsevier SAS and Infremer/IRD/Inra/Cemagref. All rights reserved MH - Czech Republic MH - Mexico|Distrito Federal PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 8 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0990-7440 UR - ISI:000186277100008 L2 - reproduction;insemination;aquaculture;enzyme;common carp;Cyprinus carpio;CYPRINUS-CARPIO; SPERMATOZOA; SEMEN; INDUCTION SO - Aquatic Living Resources 2003 ;16(5):450-456 8611 UI - 6883 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Machado AA AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang CH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaUniv Milan, Milan, ItalyIst Nazl Fis Nucl, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAdos Reis, AC, Univ Calif Davis, Davis, CA 95616, USA TI - Study of the decay mode D-0 -> K-K-K+pi(+) AB - Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the branching ratio for the Cabibbo-favored decay mode D-0 --> K- K- K+ pi(+). From a sample of 143 +/- 19 fully reconstructed D-0 --> K- K- K+ pi(+) events, we measure Gamma(D-0 --> K- K- K+ pi(+))/Gamma(D-0 --> K- pi(-) pi(+) pi(+)) = 0.00257 +/- 0.00034(stat.) +/- 0.00024(syst.). A coherent amplitude analysis has been performed to determine the resonant substructure of this decay mode. This analysis reveals a dominant contribution from phi and (K) over bar*(0)(892) states. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000186575800006 L2 - 2-BODY NONLEPTONIC DECAYS; D-MESONS SO - Physics Letters B 2003 ;575(3-4):190-197 8612 UI - 7269 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Pegna DL AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Ramirez JE AU - Rolke WA AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaINFN, Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Nucl & Teoria, Pavia, ItalyINFN, Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAJohns, WE, Univ Calif Davis, Davis, CA 95616, USA TI - Search for rare and forbidden 3-body di-muon decays of the charmed mesons D+ and D-s(+) AB - Using a high statistics sample of photo-produced charm particles from the FOCUS experiment at Fermilab, we report results of a search for eight rare and Standard-Model-forbidden decays: D+, D-S(+) --> h(+/-)mu(-/+)mu(+) (with h = pi, K). Improvement over previous results by a factor of 1.7-14 is realized. Our branching ratio upper limit D+ --> pi(+)mu(-)mu(+) of 8.8 x 10(-6) at the 90% C.L. is below the current MSSM R-parity violating constraint. (C) 2003 Published by Elsevier B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000185804400003 L2 - SMALL SIGNALS SO - Physics Letters B 2003 ;572(1-2):21-31 8613 UI - 7327 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez E AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro E AU - Malvezzi S AU - Menasce D AU - Mazzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Pegna DL AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, ItalyUniv Guanajuato, Leon 37150, Guanajuato, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaINFM, Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurements of Xi(+)(c) branching ratios AB - Using data collected by the fixed target Fermilab experiment FOCUS, we measure the branching ratios of the Cabibbo-favored decays Xi(c)(+) --> Sigma(+)K(-)pi(+), Xi(c)(+) --> Sigma(+)(K) over bar*(892)(0), and Xi(c)(+) --> Lambda(0)K(-)pi(+)pi(+) relative to Xi(c)(+) --> Xi(-)pi(+)pi(+) to be 0.91 +/- 0.11 +/- 0.04, 0.78 +/- 0.16 +/- 0.06, and 0.28 +/- 0.06 +/- 0.06, respectively. We report the first observation of the Cabibbo-suppressed decay Xi(c)(+) --> Sigma(+)K(+)K(-) and we measure the branching ratio relative to Xi(c)(+) --> Sigma(+)K(-)pi(+) to be 0.16 +/- 0.06 +/- 0.01. We also set 90% confidence level upper limits for Xi(c)(+) --> Sigma(+)phi and Xi(c)(+) --> Xi*(1690)(0)(Sigma(+)K(-))K+ relative to Xi(c)(+) --> Sigma(+)K(-)pi(+) to be 0.12 and 0.05, respectively. We find an indication of the decays Xi(c)(+) --> Omega(-)K(+)pi(+) and Xi(c)(+) --> Sigma*(1385)(+)(K) over bar (0) and set 90% confidence level upper limits for the branching ratios with respect to Xi(c)(+) --> Xi(-)pi(+)pi(+) to be 0.12 and 1.72, respectively. Finally, we determine the 90% C.L. upper limit for the resonant contribution Xi(c)(+) --> Xi*(1530)(0)pi(+) relative to Xi(c)(+) --> Xi(-)pi(+)pi(+) to be 0.10. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000185573100004 L2 - BARYON DECAYS; SPECTROMETER; FOCUS SO - Physics Letters B 2003 ;571(3-4):139-147 8614 UI - 7849 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk EE AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Pegna DL AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Peaquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyINFN, Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Studies of correlations between D and (D)over-bar mesons in high energy photoproduction AB - Studies of D (D) over bar correlations for a large sample of events containing fully and partially reconstructed pairs of charmed D mesons recorded by the Fermilab photoproduction experiment FOCUS (FNAL-E831) are presented. Correlations between D and (D) over bar mesons are used to study heavy quark production dynamics. We present results for fully and partially reconstructed charm pairs and comparisons to a recent version of PYTHIA with default parameter settings. We also comment on the production of psi (3770) in our data. (C) 2003 Published by Elsevier B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000184294400007 L2 - PI-CU INTERACTIONS; PHYSICS EVENT GENERATION; HEAVY-QUARK CORRELATIONS; HADRON-COLLISIONS; PAIR CORRELATIONS; 230 GEV/C; CHARM; HADROPRODUCTION SO - Physics Letters B 2003 ;566(1-2):51-60 8615 UI - 8368 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang CH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Colorado, Boulder, CO 80309, USACINVESTAV, Mexico City 07000, DF, MexicoCtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Calif Davis, Davis, CA 95616, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20133 Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USASegoni, I, Univ Colorado, Boulder, CO 80309, USA TI - Study of hadronic five-body decays of charmed mesons AB - We study the decay of D+ and D-s(+) mesons into charged five-body final states, and report the discovery of the decay mode D+ --> K(+)K(-)pi(+)pi(+)pi(-), as well as measurements of the decay modes D+ --> K(-)pi(+)pi(+)pi(+)pi(-), D-s(+) --> K(+)K(-)pi(+)pi(+)pi(-), D-s(+) --> phipi(+)pi(+)pi(-) and D+IDs+ --> pi(+)pi(+)pi(+)pi(-)pi(-). An analysis of the resonant substructure for D+ --> K(-)pi(+)pi(+)pi(+)pi(-) and D-s(+) --> K(+)K(-)pi(+)pi(+)pi(-) is included, with an indication that both decays proceed primarily through an a(1) vector resonance. (C) 2003 Published by Elsevier Science B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000183005700004 SO - Physics Letters B 2003 ;561(3-4):225-232 8616 UI - 8493 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang CH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurement of the Omega(0)(c) lifetime AB - The FOCUS experiment (FNAL-E831) has used two channels, Omega(-)pi(+) and Theta(-)K(-)pi(+)pi(+), to measure the lifetime of the Omega(c)(0) charmed baryon. From a sample of 64 +/- 14 signal events at a mass of 2.698 GeV/c(2), we measure an Omega(c)(0) lifetime of 72 +/- 11 (stat.) +/- 11 (sys.) fs, substantially improving upon the current world average. (C) 2003 Published by Elsevier Science B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000182760200005 L2 - SPECTROMETER; BARYON; FOCUS SO - Physics Letters B 2003 ;561(1-2):41-48 8617 UI - 9075 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang CH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Choi K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschinik M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz E AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler I AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vdandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USAUniv Puerto Rico, Mayaguez, PR 00681, USAIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Milan, Milan, ItalyIst Nazl Fis Nucl, I-20133 Milan, ItalyKyungpook Natl Univ, Taegu 702701, South KoreaKorea Univ, Seoul 136701, South KoreaIndiana Univ, Bloomington, IN 47405, USAUniv Illinois, Urbana, IL 61801, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Colorado, Boulder, CO 80309, USACINVESTAV, Mexico City 07000, DF, MexicoCtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Wisconsin, Madison, WI 53706, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Tennessee, Knoxville, TN 37996, USAUniv S Carolina, Columbia, SC 29208, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Study of the Cabibbo-suppressed decay modes D-0 ->pi(-)pi(+) and (DK-K+)-K-0 -> AB - Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement for the branching ratios of the Cabibbo-suppressed decay modes D-0 --> pi(-)pi(+) and D-0 --> K-K+. We measured: Gamma(D-0 --> K-K+)/Gamma(D-0 --> pi(-)pi(+)) = 2.81 +/- 0.10(stat) +/- 0.06(syst), Gamma(D-0 --> K-K+)/Gamma(D-0 --> K(-)pi(+)) = 0.0993 +/- 0.0014(stat) +/- 0.0014(syst), and Gamma(D-0 --> pi(-)pi(+))/Gamma(D-0 --> K(-)pi(+)) = 0.0353 +/- 0.0012(stat) +/- 0.0006(syst). These values have been combined with other experimental data to extract the ratios of isospin amplitudes and the phase shifts for the D --> KK and D --> pipi decay channels. (C) 2003 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000181126100005 L2 - BRANCHING FRACTIONS; ISOSPIN ANALYSIS; CP ASYMMETRIES; B-DECAYS; D->PI-PI; CHARM SO - Physics Letters B 2003 ;555(3-4):167-173 8618 UI - 9076 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Park KS AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chang KH AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Quinones J AU - Xiong W AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAIst Nazl Fis Nucl, I-27100 Pavia, ItalyDipartimento Fis Teorica & Nucl, Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Charm system tests of CPT and Lorentz invariance with FOCUS AB - We have performed a search for CPT violation in neutral charm meson oscillations. While flavor mixing in the charm sector is predicted to be small by the Standard Model, it is still possible to investigate CPT violation through a study of the proper time dependence of a CPT asymmetry in right-sign decay rates for D-0 --> K- pi(+) and D-0 --> K+ pi(-). This asymmetry is related to the CPT violating complex parameter and the mixing parameters x and y: A(CPT) alpha (Re xi)y - (Im xi)x. Our 95% confidence level limit is -0.0068 < (Re xi)y - (Imxi)x < 0.0234. Within the framework of the Standard Model Extension incorporating general CPT violation, we also find 95% confidence level limits for the expressions involving coefficients of Lorentz violation of (-2.8 < N(x, y,delta)(Deltaa(0) + 0.6Deltaa(Z)) < 4.8) x 10(-16) GeV, (-7.0 < N(x, y, delta)Deltaa(X) < 3.8) x 10(-16) GeV, and (-7.0 < N(x, y, delta)Deltaa(Y) < 3.8) x 10(-16) GeV, where N(x, y, delta) is the factor which incorporates mixing parameters x, y and the doubly Cabibbo-suppressed to Cabibbo-favored relative strong phase S. (C) 2003 Elsevier Science B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 32 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000181141800002 L2 - STANDARD MODEL; VIOLATION; PHYSICS SO - Physics Letters B 2003 ;556(1-2):7-13 8619 UI - 6960 AU - Linnik MD AU - Joh T AU - Strand V AU - Cardie MH AU - Tumlin JA AU - Furie RA AU - Wallace DJ AU - Hura C AD - La Jolla Pharmaceut, San Diego, CA, USAStanford Univ, Palo Alto, CA 94304, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoEmory Univ, Atlanta, GA 30322, USAN Shore Univ Hosp, Manhasset, NY, USAWallace Rheumat Study Ctr, Los Angeles, CA, USASan Antonio Kidney Dis Ctr, San Antonio, TX, USA TI - SLE patients with sustained reductions in Anti-dsDNA antibodies have a reduced risk of renal flare and major SLE flare MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801543 SO - Arthritis and Rheumatism 2003 ;48(9):S582-S582 8620 UI - 7409 AU - Lira-Ruan V AU - Sarath G AU - Klucas RV AU - rredondo-Peter R AD - Univ Autonoma Estado Morelos, Fac Ciencias, Lab Biofis & Biol Mol, Cuernavaca 62210, Morelos, MexicoUniv Nebraska, George W Beadle Ctr, Dept Biochem, Lincoln, NE 68588, USAArredondo-Peter, R, Univ Autonoma Estado Morelos, Fac Ciencias, Lab Biofis & Biol Mol, Ave Univ 1001,Colonia Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - In silico analysis of a flavohemoglobin from Sinorhizobium meliloti strain 1021 AB - Hemoglobins (Hbs) have been characterized from a wide variety of eubacteria, but not from nitrogen-fixing rhizobia. Our search for Hb-like sequences in the Sinorhizobium meliloti genome revealed that a gene coding for a flavohemoglobin (fHb) exists in S. meliloti (SmfHb). Computer analysis showed that SmfHb and Alcaligenes eutrophus fHb are highly similar and could fold into the same tertiary structure. A FNR-like box was detected upstream of the smfhb gene and mapping analysis revealed that the smfhb gene is flanked by nos and fix genes. These observations suggest that smfhb is regulated by the concentration of O-2 and that SmfHb functions in some aspects of nitrogen metabolism MH - Mexico|Morelos MH - USA PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Microbiology U5 - J;Article AV - English IS - 0944-5013 UR - ISI:000185560700002 L2 - flavohemoglobin;nitrogen-fixation;oxygen-regulation;Sinorhizobium;DIMERIC BACTERIAL HEMOGLOBIN; NITRIC-OXIDE; ESCHERICHIA-COLI; MYCOBACTERIUM-TUBERCULOSIS; RHIZOBIUM-LEGUMINOSARUM; ALCALIGENES-EUTROPHUS; NUCLEOTIDE-SEQUENCE; OXIDATIVE STRESS; GENE-EXPRESSION; HMP GENE SO - Microbiological Research 2003 ;158(3):215-227 8621 UI - 8224 AU - Liu HB AU - Jose-Yacaman M AU - Perez R AU - Ascencio JA AD - Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoUniv Texas, Texas Mat Inst, Ctr Nano & Mol Technol, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoAscencio, JA, Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Studies of nanocluster coalescence at high temperature AB - Molecular Dynamics simulations and high resolution electron microscope observations were used to determine the mechanism of nanocluster coalescence in detail. In the simulations. the tight-binding second momentum approximation potential was used to describe the interatomic interactions. The calculations not only reproduced the experimentally observed translation and reorientation during the coalescing process, but also made it possible to determine the time scale of each step in the process and to observe details of the process that could not be obtained from the experiment. For high temperature coalescence. a new mechanism differing from classical theory is proposed MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000183521200008 L2 - GOLD NANOCLUSTERS; SURFACE DIFFUSION; EVOLUTION; KINETICS; SHAPE; NANOPARTICLES; INSTABILITIES; CRYSTALLITES; PARTICLES; GRAPHITE SO - Applied Physics A-Materials Science & Processing 2003 ;77(1):63-67 8622 UI - 8340 AU - Liu JJ AU - He ZH AU - Zhao ZD AU - Pena RJ AU - Rajaram S AD - Chinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Natl Wheat Improvement Ctr, Key Lab Crop Genet & Breeding, Beijing 100081, Peoples R ChinaChinese Acad Agr Sci, CIMMYT China, Beijing 100081, Peoples R ChinaShandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Peoples R ChinaCIMMYT, Mexico City 06600, DF, MexicoLiu, JJ, Chinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Natl Wheat Improvement Ctr, Key Lab Crop Genet & Breeding, 12 Zhongguancun South St, Beijing 100081, Peoples R China TI - Wheat quality traits and quality parameters of cooked dry white Chinese noodles AB - Dry white Chinese noodle (DWCN) is widely consumed in China, and genetic improvement of DWCN quality has become a major objective for Chinese wheat breeding programs. One hundred and four bread wheat cultivars and advanced lines, including 88 from major Chinese wheat-producing areas, were sown in two locations for two years. Their DWCN quality, as evaluated by trained panelists, was studied to determine the relationship between wheat quality parameters and DWCN quality attributes. In general, the cultivars and advanced lines used in this study are characterized with acceptable protein content, but accompanied with weak-medium gluten strength and poor extensibility, and substantial variation is observed for all grain and DWCN quality characters. On average, Australia and USA wheat performed better DWCN quality than Chinese wheats. Simple correlation analysis indicated that both grain hardness and Farinograph water absorption were negatively associated with cooked DWCN color, appearance, smoothness, and taste. Flour whiteness and RVA peak viscosity was positively associated with all DWCN parameters, and their correlation coefficients (r) with DWCN score are 0.34 and 0.41, respectively. Their positive contributions to DWCN quality were mostly through improved color, appearance, smoothness, and taste. Farinograph mixing tolerance index (MTI) and softening were negatively associated with all DWCN quality parameters, and their correlation coefficients with DWCN score are -0.50 and -0.54, respectively. Further analysis indicated that association between protein content, Zeleny sedimentation value, Farinograph stability, and Extensograph extensibility, and DWCN score fit quadratic regression model significantly, with R-2 0.12, 0.32, 0.22, and 0.20, respectively. The associations between Zeleny sedimentation value and DWCN's appearance and taste also fit quadratic regression model significantly. This suggests that to certain extent, increased protein content and gluten quality contribute positively to DWCN quality, mostly by improving palatability, elasticity, and stickiness. High flour whiteness, medium protein content, medium to strong gluten strength and good extensibility, and high starch peak viscosity are desirable for DWCN quality. Genetic improvement for flour whiteness, protein quality and starch paste viscosity would increase the DWCN quality of Chinese bread wheat cultivars MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 13 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000183125200001 L2 - bread wheat;dry white Chinese noodle;extensibility;gluten strength;viscosity;Triticum aestivum;ORIENTAL NOODLES; UNITED-STATES; FLOUR; COMPONENTS; BAKING SO - Euphytica 2003 ;131(2):147-154 8623 UI - 7027 AU - Liu L AU - Samuel AM AU - Samuel FH AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Sci Appl, Chicoutimi, PQ G7H 2B1, CanadaMetal Casting Technol Inc, Mat Engn, GM Powertrain Grp, Milford, NH 03055, USACorp Nemak, Res & Dev, Garza Garcia 66221, NL, MexicoSamuel, AM, Univ Quebec, Dept Sci Appl, 555,Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada TI - Role of iron in relation to silicon modification in Sr-treated 319 and 356 alloys AB - The low specific gravity, excellent castability and good corrosion resistance of aluminium-silicon casting alloys makes them important materials for use in automotive applications. The mechanical properties of these alloys are controlled by their chemical composition as well as the quality of their microstructure. To this end, 'modifiers' such as sodium, strontium, etc. are normally added to the alloys, whereby large improvements in properties (mainly ductility) are observed, as a result of the `modification' or change in morphology of the Si phase of the Al-Si eutectic from its normally brittle, acicular form to a fibrous form, accompanied by a reduction in the Si particle size. Another important microstructural consideration is control of the iron content in order to minimise the formation of the brittle beta-Al5FeSi phase which, owing to its plate-like nature, is also deleterious to the alloy properties. In view of the fact that Sr modification is normally carried out in Al-Si alloys, and the Fe levels are usually minimised, the present work was carried out determine to what extent the presence of Fe would affect the Si modification in such alloys. Alloys 319 and 356 were selected for study, where the Fe levels in the two alloys were varied from 0.2 to 0.8 and from 0.12 to 0.6 wt-%, respectively, to cover the minimum and maximum limits specified by industry. The effects of Fe and cooling rate (using directional and conventional solidification) on the Si particle characteristics in the unmodified and Sr-modified alloys were studied, using optical and scanning electron microscopy, and quantified using image analysis. Temperature-time parameters of reactions taking place during solidification were determined using thermal analysis. The role of Al2Si2Sr precipitation in the Sr-modified alloys is discussed, and a mechanism for the effect of Fe on Si modification in such alloys is also presented. (C) 2003 Maney Publishing MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000186431900002 L2 - aluminium-silicon alloys;modification;strontium;solidification;ALLOYS; POROSITY SO - International Journal of Cast Metals Research 2003 ;16(4):397-408 8624 UI - 8926 AU - Liu L AU - Samuel AM AU - Samuel FH AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, GM Powertrain Grp, Mat Engn, Milford, NH 03055, USACorp Nemak SA de CV, Res & Dev, Garza Garcia 66221, NL, MexicoLiu, L, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Influence of oxides on porosity formation in Sr-treated Al-Si casting alloys AB - The strength and quality of an Al-Si alloy casting are determined by its microstructure and the amount of porosity present in the casting. Modification is one of the processes used to improve the microstructural quality, where the addition of a modifying agent alters the shape of the eutectic Si from an acicular to a fibrous form that is extremely beneficial to the mechanical properties. Among various modifiers, strontium has been used extensively, as it is easier to handle and more resistant to fading. However, its addition is also associated with porosity formation in these alloys. The porosity formed in Sr-modified castings has been variously related to an increase in the hydrogen level of the melt, feedability problems in the mushy zone during solidification, and changes in the mode of eutectic nucleation-from near the alpha-Al dendrites in the Sr-free alloy, to within the eutectic liquid itself in the Sr-containing alloy. The present study was carried out to determine the influence of oxides on the porosity characteristics observed in Al-Si alloys containing strontium. A series of experimental and industrial alloys viz., Al-7%Si, Al-12%Si, 319 and 356 were selected, to cover a variety of alloy freezing ranges. The techniques of thermal analysis, optical microscopy, and SEM/EDX and EPMA analyses were employed to obtain the results presented here. It is seen how the presence of oxides (Sr and Al) is responsible for the porosity formation observed in Al-Si alloys, and that the difference in porosity characteristics with the addition of Sr depends on the amount of Sr oxides present in the solidified structure. The presence of aluminum oxide films leads to the formation of large pores that are often linked together. Both aluminum and strontium oxides are favorable sites for the nucleation of other microconstituents. (C) 2003 Kluwer Academic Publishers MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000181626100020 L2 - HYDROGEN; SOLIDIFICATION SO - Journal of Materials Science 2003 ;38(6):1255-1267 8625 UI - 9342 AU - Liu SR AU - Zhai HJ AU - Castro M AU - Wang LS AD - Washington State Univ, Dept Phys, Richland, WA 99352, USAPacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352, USAUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoWang, LS, Washington State Univ, Dept Phys, Richland, WA 99352, USA TI - Photoelectron spectroscopy of Ti-n(-) clusters (n=1-130) AB - Photoelectron spectra of cold Ti-n(-) anion clusters for n=1-130 were investigated at four detachment photon energies: 532, 355, 266, and 193 nm. Improved spectral resolution provides well-resolved electronic structures of the clusters, and the spectral evolution as a function of cluster size was probed systematically. Narrow and well-resolved spectral features were observed at n=13, 19, and 55, consistent with the high symmetry icosahedral structures proposed for these clusters. The measured electron affinities as a function of size in the studied size range do not extrapolate to the bulk work function, indicating that Ti clusters with n=130 may not assume the bulk structure. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000180579900010 L2 - TRANSITION-METAL CLUSTERS; SMALL TITANIUM CLUSTERS; AB-INITIO SIMULATIONS; ELECTRONIC-STRUCTURE; GEOMETRIC STRUCTURES; SPECTRA; EVOLUTION; ANIONS; TEMPERATURE; MAGNETISM SO - Journal of Chemical Physics 2003 ;118(5):2108-2115 8626 UI - 7034 AU - Liu XJ AU - Lara-Rosano F AU - Chan CW AD - Natl Autonomous Univ Mexico, Ctr CIencias APlicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv Hong Kong, Dept Mech Engn, Hong Kong, Peoples R ChinaLiu, XJ, Natl Autonomous Univ Mexico, Ctr CIencias APlicadas & Desarrollo Tecnol, AP 70-186,Cd Univ, Mexico City 04510, DF, Mexico TI - Neurofuzzy network modelling and control of steam pressure in 300 MW steam-boiler system AB - In boiler-generation system, steam pressure is an important factor affecting the total combustion system. A properly boiler system must maintain a desired steam pressure at the outlet of the drum. Modelling and control of 300 MW steam-boiler combustion system using neurofuzzy methodology is discussed in this paper. Associate memory network (AMN) is chosen to represent the nonlinear model of steam pressure system based on local mechanism model and dynamic experiments. With the established neurofuzzy model, a relative fuzzy PI controller is constituted. The performance of the control system has been verified by the simulation process and then tested on real-time process in distributed control system (DCS) under the setpoint tracking and load disturbance. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Computer Science, Artificial Intelligence;Engineering, Multidisciplinary;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0952-1976 UR - ISI:000186514800004 L2 - neurofuzzy networks;nonlinear controller;steam pressure;FUZZY NEURAL NETWORKS SO - Engineering Applications of Artificial Intelligence 2003 ;16(5-6):431-440 8627 UI - 7578 AU - Ll JLS AU - Elizalde-Galindo JT AU - Matutes-Aquino JA AD - Complejo Ind Chihuahua, Ctr Invest Mat Avanzados SC, Chihuahua 31109, MexicoUniv La Habana, Fac Fis IMRE, Magnetism Lab, Havana 10400, CubaLl, JLS, Complejo Ind Chihuahua, Ctr Invest Mat Avanzados SC, Miguel Cervantes 120, Chihuahua 31109, Mexico TI - High coercivity nanocrystalline YCo5 powders produced by mechanical milling AB - High coercivity nanostructured YCo5 powders were successfully prepared by mechanical milling of as-cast alloys and subsequent vacuum annealing. Almost single phase YCo5 alloys, obtained by arc melting, were processed by high energy mechanical milling using a SPEX 8000 mill. After 4 h of milling, powders become nearly amorphous. DSC scans revealed the existence of an irreversible broad exothermic transition with a maximum at 516 degreesC associated with the crystallization process. Annealing in high vacuum at 800 degreesC during 2.5 min led to the formation of YCo5 nanoparticles with an average particle size of 12 nm. A high intrinsic coercivity of 7.23 kOe together with a sigma(r)/sigma(5) ratio of 0.75 were obtained. (C) 2003 Elsevier Ltd. All rights reserved MH - Cuba MH - Mexico|Chihuahua PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000184990100012 L2 - intermetallic compounds;nanocrystalline materials;high coercivity materials;permanent magnets;MAGNETS; FE SO - Solid State Communications 2003 ;127(7):527-530 8628 UI - 8036 AU - Lluch-Cota DB AU - Wooster WS AU - Hare SR AU - Lluch-Belda D AU - Pares-Sierra A AD - Ctr Invest Biol Noroeste SC, La Paz 23000, BCS, MexicoUniv Washington, Sch Marine Affairs, Seattle, WA 98195, USAIPHC, Seattle, WA, USACICIMAR, IPN, La Paz, BCS, MexicoCICESE, Ensenada, Baja California, MexicoLluch-Cota, DB, Ctr Invest Biol Noroeste SC, Km 1 Carretera San Juan de la Costa,POB 128, La Paz 23000, BCS, Mexico TI - Principal modes and related frequencies of sea surface temperature variability in the Pacific Coast of North America AB - We examined monthly time-series (1950 to 1999) of sea surface temperature (SST) anomalies in 47 quadrants (2degrees x 2degrees) along the Pacific coast of North America. Correlation, clustering and principal components analyses were applied to identify the spatial structure in coastal SST. The resulting modes and the individual series were investigated using spectral analysis to identify the most significant time-scales of variability, and the propagation of the main signals was explored by computing the wavenumber-frequency spectrum of each spatial mode. Results showed that coastal SST variability in the northeast Pacific conformed to three main geographical modes. A tropical mode extends from the equator to about the entrance to the Gulf of California. This mode appears related to two low frequency components of the El Ni (n) over tildeo-Southern Oscillation of about 3 and 5 years. The SST anomaly related to these signals propagates poleward, seemingly at low speeds (similar to0.08 m s(-1)). A temperate (or transitional) mode, which includes the coastal areas along the California Current System, also shows the 5-year signal plus a decadal-scale component (periods between 10-17 years). Finally, a subarctic mode includes the coastal areas along the Gulf of Alaska and is dominated by the interdecadal variability that is characterized by the Pacific Decadal Oscillation MH - Mexico|Baja California MH - Mexico|Baja California Sur MH - USA PB - TOKYO: TERRA SCIENTIFIC PUBL CO RP - NOT IN FILE U3 - TC 5 U4 - Oceanography U5 - J;Article AV - English IS - 0916-8370 UR - ISI:000183866500008 L2 - Eastern Pacific;transitional zone;quasi-biennial oscillation;El Nino-Southern Oscillation;Pacific Decadal Oscillation;decadal-scale variability;EMPIRICAL ORTHOGONAL FUNCTIONS; DECADAL CLIMATE VARIABILITY; SOUTHERN OSCILLATION; INTERANNUAL VARIABILITY; EL-NINO; OCEANIC VARIABILITY; TROPICAL PACIFIC; GLOBAL CLIMATE; REGIME SHIFTS; WEST-COAST SO - Journal of Oceanography 2003 ;59(4):477-488 8629 UI - 9322 AU - Lobell DB AU - Asner GP AU - Ortiz-Monasterio JI AU - Benning TL AD - Univ Colorado, Dept Geol Sci, Boulder, CO 80309, USAUniv Colorado, Environm Studies Program, Boulder, CO 80309, USACIMMYT, Int Maize & Wheat Improvement Ctr, Wheat Program, Mexico City 06600, DF, MexicoUniv Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720, USALobell, DB, Carnegie Inst Washington, Dept Global Ecol, Stanford, CA 94305 USA TI - Remote sensing of regional crop production in the Yaqui Valley, Mexico: estimates and uncertainties AB - Quantifying crop production at regional scales is critical for a wide range of applications, including management and carbon cycle modeling. Remote sensing offers great potential for monitoring regional production, yet the uncertainties associated with large-scale yield estimates are rarely addressed. In this study, we estimated crop area, yield, and planting dates for 2 years of Landsat imagery in an intensive agricultural region in northwest Mexico. Knowledge of crop phenology was combined with multi-temporal imagery to estimate crop rotations throughout the region. Remotely sensed estimates of the fraction of absorbed photosynthetically active radiation (fAPAR) were then incorporated into a simple model based on crop light-use efficiency to predict yield and planting dates for wheat. Uncertainty analysis revealed that regional yield predictions varied up to 20% with the method used to determine fAPAR from satellite, but were relatively insensitive to modeled variability in crop phenology, light-use efficiency, and harvest index (the ratio of grain mass to aboveground biomass). Comparisons of satellite-based and field-based estimates indicated errors in regional wheat yields of less than 4% for both years of data. In contrast, planting date calculations exhibited uncertainties of up to 50% using a sparse, three-date sampling from satellite-based sensors. A simplified model was also developed to explore yield predictions using only one date of imagery, demonstrating high accuracies depending on the date of image acquisition. The spatial and temporal distributions of crop production derived here offer valuable information for agricultural management and biogeochemical modeling efforts, provided that their uncertainties are well understood. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000180646500007 L2 - crop yield;NTPP;remote sensing;wheat;radiation use efficiency;uncertainty analysis;RADIATION-USE EFFICIENCY; PHOTOSYNTHETICALLY ACTIVE RADIATION; SATELLITE DATA; WINTER-WHEAT; TERRESTRIAL ECOSYSTEMS; SENSITIVITY ANALYSIS; CARBON ACCUMULATION; SOLAR-RADIATION; ORGANIC-CARBON; MODEL SO - Agriculture Ecosystems & Environment 2003 ;94(2):205-220 8630 UI - 7892 AU - Lobo JA AU - Quesada M AU - Stoner KE AU - Fuchs EJ AU - Herrerias-Diego Y AU - Rojas J AU - Saborio G AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaQuesada, M, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Campus Morelia,Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Factors affecting phenological patterns of bombacaceous trees in seasonal forests in Costa Rica and Mexico AB - We compared phenological patterns of tree species of the family Bombacaceae in three seasonal forests in Mexico and Costa Rica whose dry seasons vary in duration and intensity. The objectives were to (1) determine intraspecific variation in phenology between sites in different geographic locations with different precipitation regimes, (2) compare interspecific phenological patterns within sites during one year, and (3) document seasonal pollinator use of floral resources at one site in relation to the flowering phenology of these species. To determine the sequence of phenological events in trees of the family Bombacaceae across three study sites, phenology of marked individuals was recorded every 2 wk from September 2000 through August 2001 for six species. To estimate the importance of bombacaceous species in the diet of nectarivorous bats, pollen samples were collected from the bodies or feces of bats once every 2 wk during flowering. Our study suggests that phenological patterns of the Bombacaceae family in Neotropical dry forests are mainly constrained by phylogenetic membership and adaptive selective pressures associated with competition for pollinators. Abiotic factors related to precipitation and soil water content appear to be regulating leaf flushing and abscission, but the principal causes of flowering are related to ultimate factors associated with competition for pollinators. This study is the first that evaluates the phenological pattern of species and genera of the same family at different latitudes in a similar life zone MH - Costa Rica MH - Mexico|Michoacan PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 16 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000184310900012 L2 - Bombacaceae;Costa Rica;Mexico;nectarivorous bats;Neotropics;phenology;plant reproduction;pollinator competition;TROPICAL DRY FOREST; FLOWERING PHENOLOGY; REPRODUCTIVE SUCCESS; ADAPTIVE SIGNIFICANCE; DECIDUOUS FOREST; PACHIRA-QUINATA; COMMUNITY; POLLINATION; DROUGHT; POLLEN SO - American Journal of Botany 2003 ;90(7):1054-1063 8631 UI - 8413 AU - Loffredo CA AU - Aposhian HV AU - Cebrian ME AU - Yamauchi H AU - Silbergeld EK AD - Univ Maryland, Sch Med, Dept Epidemiol & Prevent Med, Program Human Hlth & Envirom, Baltimore, MD 21201, USAUniv Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USAInst Politecn Nacl, CINVESTAV, Dept Farmacol & Toxicol, Mexico City 07000, DF, MexicoSt Marianna Univ, Sch Med, Dept Prevent Med, Kawasaki, Kanagawa 2168511, JapanSilbergeld, EK, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Environm Hlth Sci, Baltimore, MD 21205 USA TI - Variability in human metabolism of arsenic AB - Estimating the nature and extent of human cancer risks due to arsenic (As) in drinking water is currently of great concern, since millions of persons worldwide are exposed to arsenic, primarily through natural enrichment of drinking water drawn from deep wells. Humans metabolize and eliminate As through oxidative methylation and subsequent urinary excretion. While there is debate as to the role of methylation in activation/detoxification, variations in arsenic metabolism may affect individual risks of toxicity and carcinogenesis. Using data from three populations, from Mexico, China, and Chile, we have analyzed the distribution in urine of total arsenic and arsenic species (inorganic arsenic (InAs), monomethyl arsenic (MMA), and dimethyl arsenic (DMA)). Data were analyzed in terms of the concentration of each species and by evaluating MMA:DMA and (MMA + DMA):InAs ratios. In all persons most urinary As was present as DMA. Male:female differences were discernible in both high- and low-exposure groups from all three populations, but the gender differences varied by populations. The data also indicated bimodal distributions in the ratios of DMA to InAs and to MMA. While the gene or genes responsible for arsenic methylation are still unknown, the results of our studies among the ethnic groups in this study are consistent with the presence of functional genetic polymorphisms in arsenic methylation leading to measurable differences in toxicity. This analysis highlights the need for continuing research on the health effects of As in humans using molecular epidemiologic methods. (C) 2003 Elsevier Science (USA). All rights reserved MH - Japan MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 30 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000183055700003 L2 - arsenic;methylation;genetic polymorphisms;cancer;drinking water;DRINKING-WATER; ENZYMATIC METHYLATION; NORTHERN CHILE; ENDEMIC AREA; TOXICITY; METHYLTRANSFERASE; EXPOSURE; ACID; BIOTRANSFORMATION; HYPOTHESIS SO - Environmental Research 2003 ;92(2):85-91 8632 UI - 7709 AU - Logvinov GN AU - Gurevich YG AU - Lashkevich IM AD - ESIME Culhuacan, Inst Politecn Nacl, Secc Estudios Posgrado & Invest, Mexico City 04430, DF, MexicoCINVESTAV, IPN, Dept Fis, Mexico City 07000, DF, MexicoTernopil Natl Pedagog Univ, Dept Math & Phys, UA-46000 Ternopol, UkraineLogvinov, GN, ESIME Culhuacan, Inst Politecn Nacl, Secc Estudios Posgrado & Invest, CD, Mexico City 04430, DF, Mexico TI - Surface heat capacity and surface heat impedance: An application to theory of thermal waves AB - In this work the thermal waves in a bounded solid are investigated taking into account the surface thermal conductivity, surface heat capacity and surface heat impedance. The last two concepts are defined by means of the heat diffusion equation to study the heat transport through the surface. The general boundary conditions to the thermal diffusion equation are obtained, and the temperature distribution is analyzed. Some special cases, depending on the correlation between the characteristic lengths involved in the heat diffusion and the light absorption are represented. It is shown that the modulation and non-modulation irradiation is absorbed on the surface or in the bulk in the different ways MH - Mexico|Distrito Federal MH - Ukraine PB - MINATO-KU TOKYO: INST PURE APPLIED PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-4922 UR - ISI:000184662000060 L2 - surface heat capacity;surface heat impedance;thermal wave;surface thermal conductivity;SEMICONDUCTORS; ELECTRON SO - Japanese Journal of Applied Physics Part 1-Regular Papers Short Notes & Review Papers 2003 ;42(7A):4448-4452 8633 UI - 7401 AU - Lomeli HE AU - Meiss JD AD - Inst Tecnol Autonomo Mexico, Dept Math, Mexico City 01000, DF, MexicoUniv Colorado, Dept Math Appl, Boulder, CO 80309, USALomeli, HE, Inst Tecnol Autonomo Mexico, Dept Math, Mexico City 01000, DF, Mexico TI - Heteroclinic intersections between invariant circles of volume-preserving maps AB - We develop a Melnikov method for volume-preserving maps that have normally hyperbolic invariant sets with codimension-one invariant manifolds. The Melnikov function is shown to be related to the flux of the perturbation through the unperturbed invariant surface. As an example, we compute the Melnikov function for a perturbation of a three-dimensional map that has a heteroclinic connection between a pair of invariant circles. The intersection curves of the manifolds are shown to undergo bifurcations in homology MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0951-7715 UR - ISI:000185507700002 L2 - 3-DIMENSIONAL LIOUVILLIAN MAPS; HAMILTONIAN-SYSTEMS; SYMPLECTIC MAPS; MELNIKOV METHOD; TRANSPORT; FLOWS; DIFFUSION; AREA SO - Nonlinearity 2003 ;16(5):1573-1595 8634 UI - 8412 AU - Long KZ AU - Rosado J AU - Montoya Y AU - Fawzi W AU - Hertzmark E AU - Santos JI AD - Harvard Univ, Sch Publ Hlth, Boston, MA 02115, USAUniv Queretero, Queretaro, Qro, MexicoCENSIA, Mexico City, DF, Mexico TI - Vitamin A and zinc have divergent effects on morbidity among subgroups of children in Mexico City, Mexico MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796902106 SO - Faseb Journal 2003 ;17(5):A1200-A1200 8635 UI - 6969 AU - Lonnroth I AU - Lange S AU - Jennische E AU - Johansson E AU - Jonson I AU - Torres J AD - Gothenburg Univ, Dept Med Microbiol & Immunol, SE-41346 Gothenburg, SwedenGothenburg Univ, Dept Clin Bacteriol, SE-41346 Gothenburg, SwedenGothenburg Univ, Dept Anat & Cell Biol, SE-41346 Gothenburg, SwedenInst Mexicano Seguro Social, Coordinac Invest, Unidad Invest Med Enfermedades Infecciosas, Mexico City, DF, MexicoLonnroth, I, Gothenburg Univ, Dept Med Microbiol & Immunol, Guldhedsgatan 10, SE-41346 Gothenburg, Sweden TI - Cholera toxin protects against action by Clostridium difficile toxin A - The role of antisecretory factor in intestinal secretion and inflammation in rat AB - The protein antisecretory factor (AF) inhibits intestinal fluid secretion induced by the cholera toxin (CT) and Clostridium difficile toxin A (CDA). The present work investigated whether CT-induced AF protects against the enterotoxin action by CDA. Rats were pretreated perorally with CT or buffer as control, whereafter CDA-induced fluid secretion and cytotoxicity was tested in vivo in ligated intestinal loops; the mucosal level of AF was estimated using the Western blot technique. Rats given repeated peroral doses of CT became tolerant to CDA, the inhibition of fluid secretion and of cytotoxicity being 79% in eight out of nine animals. The repeated CT-treatment also induced long-lasting rise of AF in the mucosal epithelium. Recombinant AF given either perorally or intravenously inhibited both fluid secretion and cytotoxicity by CDA; similar results were obtained with a truncated 16-mer AF peptide. In conclusion: peroral CT-treatment induced tolerance to CDA in rat small intestine. The tolerance was probably mediated by AF induced via action of cholera toxin on the enteric nervous and immune system MH - Mexico|Distrito Federal MH - Sweden PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Microbiology;Pathology U5 - J;Article AV - English IS - 0903-4641 UR - ISI:000186551400010 L2 - enterotoxin;diarrhoea;cytotoxicity;Vibrio cholerae;neuropeptide;INTRACELLULAR-LOCALIZATION; NEURONAL INVOLVEMENT; MOLECULAR-CLONING; FLUID SECRETION; ENTEROTOXIN; PROTEINS; EXPRESSION; MECHANISMS; DIARRHEA; MEMBRANE SO - Apmis 2003 ;111(10):969-977 8636 UI - 8242 AU - Lopez-Briones S AU - Lamoyi E AU - Fragoso G AU - Soloski MJ AU - Sciutto E AD - Univ Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoJohns Hopkins Univ, Sch Med, Baltimore, MD, USASciutto, E, Univ Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Apartado Postal 70-228, Mexico City 04510, DF, Mexico TI - Taenia crassiceps cysticercosis: immune response in susceptible and resistant BALB/c mouse substrains AB - Taenia crassiceps can naturally and experimentally infect rodents in which they reproduce by budding. Differences in the susceptibility to T. crassiceps cysticercosis were found between two BALB/c substrains: BALB/cAnN (susceptible) and BALB/cJ (resistant). In chimeric mice, resistance was transferred to susceptible mice with bone marrow cells from the resistant mice, which argues in favor of an immune mediation of the resistant phenotype. To further explore the immune response that could underlie these differences in susceptibility, the specific cellular immune response elicited by the parasite was explored in both substrains. An increased proliferative response and IL-2 levels were induced by cysticercal antigens only in splenocytes from resistant mice. A decrease in the percentage of CD4(+) (11.1%), CD8(+) (17.5%) was found in splenocytes from susceptible BALB/cAnN mice. A study of the TCRVbeta repertoire revealed a significant decrease in Vbeta2 in both CD4(+) and CD8(+) splenocytes only in the susceptible BALB/cAnN strain MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000183448900011 L2 - EXPERIMENTAL MURINE CYSTICERCOSIS; T-CELL RECEPTOR; GENETIC-CONTROL; BONE-MARROW; QA-2; MICE; INFECTION; LYMPHOCYTES; EXPRESSION; ANTIGENS SO - Parasitology Research 2003 ;90(3):236-242 8637 UI - 6859 AU - Lopez-Carrillo L AU - Torres-Sanchez L AU - Tobias A AU - Lopez-Cervantes M AD - Natl Inst Hlth, Mexico City, DF, MexicoUniv Carlos III Madrid, Dept Stat & Econometr, Madrid, SpainMexico Natl Inst Publ Hlth, Cuernavaca, Morelos, Mexico TI - DDE burden and breast cancer risk: A meta-analysis of the epidemiologic evidence MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000185488600141 SO - Epidemiology 2003 ;14(5):S63-S63 8638 UI - 7977 AU - Lopez-Carrillo L AU - Lopez-Cervantes M AU - Robles-Diaz G AU - Ramirez-Espitia A AU - Mohar-Betancourt A AU - Meneses-Garcia A AU - Lopez-Vidal Y AU - Blair A AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoMexico Natl Inst Med Sci & Nutr, Mexico City, DF, MexicoMexico Natl Canc Inst, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoNCI, Rockville, MD, USALopez-Carrillo, L, Inst Nacl Salud Publ, Av Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Capsaicin consumption, Helicobacter pylori positivity and gastric cancer in Mexico AB - Gastric cancer (GC) incidence has not declined in Mexico. We assessed whether the intake of capsaicin (CAP), the pungent compound of chili peppers, increases the risk of GC independently of H. pylori positivity (Hp). From 1994 to 1996, a hospital-based case-control study was performed in 3 areas of Mexico; 234 cases of GC and 468 matched controls were enrolled and their diet and other characteristics were inquired. Chili pepper intake was queried by interview and CAP content of chilies was determined in a separate analysis by gas chromatography to estimate CAP intake; IGg Hp serum antibodies were determined by ELISA. The risk of GC was increased (OR = 1.71; 95% CI = 0.76-3.88) among high-level consumers of CAP (90-250 mg of capsaicin per day, approximately 9-25 jalapeno peppers per day) as compared to low-level consumers (0-29.9 mg of capsaicin per day, approximately 0 to less than 3 jalapeno peppers per day; p for trend p = 0.026); this effect was independent of Hp status and other potential GC determinants and was higher among diffuse GC cases (OR = 3.64; 95% CI = 1.09-12.2; p for trend = 0.002) compared to intestinal GC cases (OR = 1.36; 95% CI = 0.31-5.89; p for trend = 0.493). No significant interaction was found between CAP intake and Hp on GC risk. Chili pepper consumption might be an independent determinant of GC in Mexico. (C) 2003 Wiley-Liss. Inc MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 15 U4 - Oncology U5 - J;Article AV - English IS - 0020-7136 UR - ISI:000184092100020 L2 - capsaicin;chili pepper;gastric cancer;Helicobacter pylori;histological types;Mexico;CHILI-PEPPER CONSUMPTION; STOMACH-CANCER; INFECTION; RISK; ASSOCIATION; CARCINOMA SO - International Journal of Cancer 2003 ;106(2):277-282 8639 UI - 9440 AU - Lopez-Casillas F AU - Riquelme C AU - Perez-Kato Y AU - Ponce-Castaneda MV AU - Osses N AU - Esparza-Lopez J AU - Gonzalez-Nunez G AU - Cabello-Verrugio C AU - Mendoza V AU - Troncoso V AU - Brandan E AD - Pontificia Univ Catolica Chile, Fac Ciencias Biol, Dept Biol Celular & Mol, Ctr Regulac Celular & Patol,Millenium Inst Fundam, Santiago, ChileUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoBrandan, E, Pontificia Univ Catolica Chile, Fac Ciencias Biol, Dept Biol Celular & Mol, Ctr Regulac Celular & Patol,Millenium Inst Fundam, Casilla 114-D, Santiago, Chile TI - Betaglycan expression is transcriptionally up-regulated during skeletal muscle differentiation - Cloning of murine betaglycan gene promoter and its modulation by myoD, retinoic acid, and transforming growth factor-beta AB - Betaglycan is a membrane-anchored proteoglycan co-receptor that binds transforming growth factor beta (TGF-beta) via its core protein and basic fibroblast growth factor through its glycosaminoglycan chains. In this study we evaluated the expression of betaglycan during the C2C12 skeletal muscle differentiation. Betaglycan expression, as determined by Northern and Western blot, was up-regulated during the conversion of myoblasts to myotubes. The mouse betaglycan gene promoter was cloned, and its sequence showed putative binding sites for SP1, Smad3, Smad4, muscle regulatory factor elements such as MyoD and MEF2, and retinoic acid receptor. Transcriptional activity of the mouse betaglycan promoter reporter was also up-regulated in differentiating C2C12 cells. We found that MyoD, but not myogenin, stimulated this transcriptional activity even in the presence of high serum. Betaglycan promoter activity was increased by RA and inhibited by the three isoforms of TGF-beta. On the other hand, basic fibroblast growth factor, BMP-2, and hepatocyte growth factor/scatter factor, which are inhibitors of myogenesis, had little effect. In myotubes, up-regulated betaglycan was also detectable by TGF-beta affinity labeling and immunofluorescence microscopy studies. The latter indicated that betaglycan was localized both on the cell surface and in the ECM Forced expression of betaglycan in C2C12 myoblasts increases their responsiveness to TGF-beta2, suggesting that it performs a TGF-beta presentation function in this cell lineage. These results indicate that betaglycan expression is up-regulated during myogenesis and that MyoD and RA modulate its expression by a mechanism that is independent of myogenin MH - Chile MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000180255700051 L2 - FACTOR-DEPENDENT MECHANISM; FIBROBLAST GROWTH; MYOBLAST DIFFERENTIATION; III RECEPTOR; MYOGENIC DIFFERENTIATION; PROTEOGLYCAN BETAGLYCAN; SATELLITE CELLS; LIGAND-BINDING; TERMINAL DIFFERENTIATION; MEMBRANE PROTEOGLYCAN SO - Journal of Biological Chemistry 2003 ;278(1):382-390 8640 UI - 9359 AU - Lopez-Gonzalez I AU - Olamendi-Portugal T AU - de la Vega-Beltran J AU - van der Walt J AU - Dyason K AU - Possani LD AU - Felix R AU - Darszon A AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Cuernavaca 62100, Mor, MexicoNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62100, Mor, MexicoPotchefstroom Univ Christian Higher Educ, Potchefstroom, South AfricaIPN, Cinvestav, Dept Physiol Biophys & Neurosci, Mexico City, DF, MexicoDarszon, A, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Ave Univ 2001,Col Chamilpa, Cuernavaca 62100, Mor, Mexico TI - Scorpion toxins that block T-type Ca2+ channels in spermatogenic cells inhibit the sperm acrosome reaction AB - The acrosome reaction (AR) is a Ca2+-dependent event required for sperm to fertilize the egg. The activation of T-type voltage-gated Ca2+ channels plays a key role in the induction of this process. This report describes the actions of two toxins from the scorpion Parabuthus granulatus named kurtoxin-like I and II (KLI and KLII respectively) on sperm Ca2+ channels. Both toxins decrease T-type Ca2+ channel activity in mouse spermatogenic cells and inhibit the AR in mature sperm. Saturating concentrations of the toxins inhibited at most similar to70%, of the whole-cell Ca2+ current, suggesting the presence of a toxin-resistant component. In addition, both toxins inhibited similar to60% of the AR, which is consistent with the participation of T-type Ca2+ channels in the sperm AR, (C) 2002 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - South Africa PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000180607000025 L2 - acrosome reaction;Ca2+ channel;kurtoxin;scorpion toxin;sperm;ACTIVATED CALCIUM-CHANNEL; MOUSE SPERM; EGG ZP3; MAMMALIAN FERTILIZATION; XENOPUS OOCYTES; ION CHANNELS; N-TYPE; SUBUNIT; ENTRY; CAPACITATION SO - Biochemical and Biophysical Research Communications 2003 ;300(2):408-414 8641 UI - 8536 AU - Lopez-Marin LM AU - Segura E AU - Hermida-Escobedo C AU - Lemassu A AU - Salinas-Carmona MC AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoIMSS, Hosp Infectol, Ctr Med La Raza, Mexico City, DF, MexicoUniv Paul Sabatier 5089, UMR CNRS, Inst Pharmacol & Biol Struct, Toulouse, FranceFac Med & Hosp Univ, Dept Inmunol, Monterrey, NL, MexicoLopez-Marin, LM, Natl Autonomous Univ Mexico, Inst Invest Biomed, Apdo Postal 70-228,CU Circuito Escolar, Mexico City 04510, DF, Mexico TI - 6,6 '-dimycoloyl trehalose from a rapidly growing Mycobacterium: an alternative antigen for tuberculosis serodiagnosis AB - Mycobacterial O-acyltrehaloses have been described as highly specific and sensitive reagents for tuberculosis immunodiagnosis. An O-acyltrehalose-containing lipid fraction from the rapidly growing Mycobacterium fortuitum was found to include additional antigens, which presented high cross-reactivity with sera from tuberculosis-infected patients. Based on a combination of selective chemical degradations, thin-layer-chromatography analyses and H-1-nuclear magnetic resonance spectroscopy, the antigenic by-product was identified as 6,6'-dimycoloyl trehalose, the so-called cord factor. The lipid was purified and tested in ELISA for pulmonary tuberculosis serodiagnosis. Sensitivity and specificity of the test were found to be 66.6-74.1% and 95.2-99.0%, respectively, showing a slightly higher efficiency as compared to the ELISA performed using 6,6'-dimycoloyl trehalose from Mycobacterium tuberculosis. No cross-reactivity was found with sera from Nocardia-infected individuals. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0928-8244 UR - ISI:000182713700007 L2 - tuberculosis diagnosis;glycolipids;cord factor;immunodiagnosis;LINKED-IMMUNOSORBENT-ASSAY; PULMONARY TUBERCULOSIS; DIAGNOSIS; GLYCOLIPIDS; ANTIBODY; IMMUNOASSAY; FORTUITUM; DISEASES; NOCARDIA; ELISA SO - Fems Immunology and Medical Microbiology 2003 ;36(1-2):47-54 8642 UI - 7379 AU - Lopez-Rodriguez F AU - Medina-Ceja L AU - Morales-Villagran A AU - Jhung D AU - Engel J AU - Wilson CL AD - Univ Calif Los Angeles, Dept Psychiat & Biobehav Sci, Los Angeles, CA 90024, USAUniv Calif Los Angeles, Inst Brain Res, Los Angeles, CA 90024, USAUniv Calif Los Angeles, Dept Neurol, Los Angeles, CA 90024, USAUniv Calif Los Angeles, Dept Neurobiol, Los Angeles, CA, USAUniv Guadalajara, Dept Biol Celular & Mol, Guadalajara, Mexico TI - Changes in extracellular glutamate levels in the medial prefrontal cortex of the rat during sleep and wakefulness MH - Mexico|Jalisco MH - USA PB - WESTCHESTER: AMER ACADEMY SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000182841100058 SO - Sleep 2003 ;26():A24-A24 8643 UI - 9142 AU - Lopez-Sandoval R AU - Pastor GM AD - Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78210, MexicoUniv Toulouse 3, Phys Quant Lab, CNRS, F-31062 Toulouse, FranceLopez-Sandoval, R, Inst Potosino Invest Cient & Tecnol, Ave Venustiano Carranza 2425-A, San Luis Potosi 78210, Mexico TI - Electronic properties of the dimerized one-dimensional Hubbard model using lattice density-functional theory AB - The dimerized one-dimensional Hubbard model is studied in the framework of lattice density-functional theory (LDFT). The single-particle density matrix gamma(ij) with respect to the lattice sites is considered as the basic variable. The corresponding interaction-energy functional W[gamma(ij)] is defined by Levy's constrained search. Exact numerical results are obtained for W(gamma(12),gamma(23)), where gamma(12)=gamma(i,i+1) for odd i and gamma(23)=gamma(i,i+1) for even i are the nearest-neighbor density-matrix elements along the chain. The domain of representability of gamma(ij) and the functional dependence of W(gamma(12),gamma(23)) are analyzed. A simple, explicit approximation to W(gamma(12),gamma(23)) is proposed, which is derived from scaling properties of W, exact dimer results, and known limits. Using this approximation, LDFT is applied to determine ground-state properties and charge-excitation gaps of finite and infinite dimerized chains as a function of the Coulomb-repulsion strength U/t and of the alternation deltat of the hopping integrals t(ij) (t(ij)=t+/-deltat). The accuracy of the method is demonstrated by comparison with available exact solutions and accurate numerical calculations. Goals and limitations of the present approach are discussed particularly concerning its ability to describe the crossover from weak to strong electron correlations MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000180943800043 L2 - QUANTUM RENORMALIZATION-GROUPS; TRANS-POLYACETYLENE; REPRESENTABILITY PROBLEM; MATRIX; APPROXIMATION; ABINITIO; STATE; ALTERNATION; POLYENE; SYSTEMS SO - Physical Review B 2003 ;67(3): 8644 UI - 9354 AU - Lopez-Saucedo C AU - Cerna JF AU - Villegas-Sepulveda N AU - Thompson R AU - Velazquez FR AU - Torres J AU - Tarr PI AU - Estrada-Garcia T AD - CINVESTAV IPN, Dpto Biomed Mol, Mexico City, DF, MexicoIMSS, Ctr Med Nacl Siglo XXI, Hosp Pediat, UIM Enfermedades Infecciosas & Parasitarias, Mexico City, DF, MexicoWashington Univ, Sch Med, Childrens Hosp, Seattle, WA, USAWashington Univ, Sch Med, Reg Med Ctr, Seattle, WA, USAEstrada-Garcia, T, CINVESTAV IPN, Dpto Biomed Mol, Mexico City, DF, Mexico TI - Single multiplex a polymerase chain reaction to detect diverse loci associated with a diarrheagenic Escherichia coli AB - We developed and tested a single multiplex polymerase chain reaction (PCR) that detects enterotoxigenic enteropathogenic, enteroinvasive, and Shiga toxin-producing Escherichia coli. This PCR is specific, sensitive. and rapid in detecting target isolates in stool and food, Because of its simplicity, economy, and efficiency, this protocol warrants further evaluation in large, prospective studies of polymicrobial substances MH - Mexico|Distrito Federal MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 14 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000180503300023 L2 - FACTOR ANTIGEN-II; PCR ASSAYS; IDENTIFICATION; COLONIZATION; TRAVELERS; CHILDREN; STRAINS; SAMPLES; GENES; FOOD SO - Emerging Infectious Diseases 2003 ;9(1):127-131 8645 UI - 8558 AU - Lopez AH AU - Leon CA AU - Kennedy AR AU - Drew RAL AU - Bedolla A AD - UMSNH, Inst Invest Met, Morelia 58000, Michoacan, MexicoUniv Nottingham, Adv Mat Res Grp, Nottingham NG7 2RD, EnglandMcGill Univ, Dept Met Engn, Montreal, PQ H3A 282, CanadaLopez, AH, UMSNH, Inst Invest Met, POB 52-B, Morelia 58000, Michoacan, Mexico TI - Spreading mechanism of molten Al-Alloys on TiC substrates AB - The contact angle data drawn from sessile drop tests of commercial aluminum alloys (1010, 2024, 6061 and 7075) on TiC substrates (at 900degreesC, under vacuum and argon atmospheres) was plotted on a logarithmic time scale. Several aspects were taken into account to describe the spreading mechanism in four kinetic stages in systems that exhibited wetting (1010, 2024 in both environments and 7075 under vacuum). It was found that commercial multi-element alloys do not improve wetting of Al on TiC and that alloying elements and the atmosphere exert a significant role on the wetting behavior in the early stages. A physical model describing spreading in the early stages is presented. The influence of alloying elements and the type of atmosphere on the deoxidation of the drops are discussed MH - Canada MH - United Kingdom MH - Mexico|Michoacan PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000182605200065 L2 - wettability;spreading;TiC;Al-alloys;alloying elements;oxide film;deoxidation;ALUMINUM-ALLOYS; WETTABILITY; SYSTEM SO - Advanced Powder Technology Iii 2003 ;416-4():395-400 8646 UI - 8138 AU - Lopez B AU - Aguilar D AU - Orozco H AU - Burger M AU - Espitia C AU - Ritacco V AU - Barrera L AU - Kremer K AU - Hernandez-Pando R AU - Huygen K AU - Van Soolingen D AD - Inst Nacl Nutr Salvador Zubiran, Dept Pathol, Mexico City 14000, DF, MexicoNatl Adm Hlth Labs, Natl Inst Infect Dis, Buenos Aires, DF, ArgentinaInst Carlos G Malbran, Buenos Aires, DF, ArgentinaNatl Inst Publ Hlth & Environm, Mycobacteria Reference Dept, Diagnost Lab Infect Dis & Perinatal Screening, NL-3720 BA Bilthoven, NetherlandsNatl Autonomous Univ Mexico, Dept Immunol, Inst Biomed Res, Mexico City, DF, MexicoInst Pasteur Brussels, Brussels, BelgiumHernandez-Pando, R, Inst Nacl Nutr Salvador Zubiran, Dept Pathol, Calle Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - A marked difference in pathogenesis and immune response induced by different Mycobacterium tuberculosis genotypes AB - In the last decade, an unprecedented genetic diversity has been disclosed among Mycobacterium tuberculosis strains found worldwide. However, well-conserved genotypes seem to prevail in areas with high incidence of tuberculosis. As this may be related to selective advantages, such as advanced mechanisms to circumvent [M. bovis Bacille Calmette-Guerin (BCG)-induced] host defence mechanisms, we investigated the influence of strain diversity on the course of experimental disease. Twelve M. tuberculosis strains, representing four major genotype families found worldwide today, and the laboratory strain H37Rv were each used to infect BALB/c mice by direct intratracheal injection. Compared with H37Rv, infections with Beijng strains were characterized by extensive pneumonia, early but ephemeral tumour necrosis factor-alpha (TNF-alpha ) and inducible isoform of nitric oxide synthetase (iNOS) expression, and significantly higher earlier mortality. Conversely, Canetti strains induced limited pneumonia, sustained TNF-alpha and iNOS expression in lungs, and almost 100% survival. Strains of the Somali and the Haarlem genotype families displayed less homogeneous, intermediate rates of survival. Previous BCG vaccination protected less effectively against infection with Beijing strains than against the H37Rv strain. In conclusion, genetically different M. tuberculosis strains evoked markedly different immunopathological events. Bacteria with the Beijing genotype, highly prevalent in Asia and the former USSR, elicited a non-protective immune response in mice and were the most virulent. Future immunological research, particularly on candidate vaccines, should include a broad spectrum of M. tuberculosis genotypes rather than a few laboratory strains MH - Argentina MH - Belgium MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 82 U4 - Immunology U5 - J;Article AV - English IS - 0009-9104 UR - ISI:000183759400005 L2 - EXPERIMENTAL PULMONARY TUBERCULOSIS; BEIJING GENOTYPE; NITRIC-OXIDE; MICE; VIRULENT; STRAIN; GENE; DNA; TRANSMISSION; RESISTANCE SO - Clinical and Experimental Immunology 2003 ;133(1):30-37 8647 UI - 8647 AU - Lopez EV AU - Luis GP AU - Suarez-Rodriguez JL AU - Rivero IA AU - az-Garcia ME AD - Technol Inst Tijuana, Tijuana 22000, Baja California, MexicoUniv Havana, Dept Analyt Chem, Havana, CubaUniv Oviedo, Fac Chem, Dept Phys & Analyt Chem, Oviedo 33006, SpainRivero, IA, Technol Inst Tijuana, PO 1166, Tijuana 22000, Baja California, Mexico TI - Immobilization of a boronic receptor for fructose recognition: influence on the photoinduced electron transfer process AB - The work presented here describes the synthesis on different solid supports of a luminescent probe, dansylphenylboronic acid (DPBA) for use in fructose recognition. While in aqueous solution DPBA changes its fluorescence in response to added fructose via a photoinduced electron transfer (PET) mechanism, we have found that once immobilized the fructose binding event could not be monitored by a change in fluorescence. It was observed, however, that the immobilized DPBA displayed enhanced acidity upon binding of fructose. The system was indeed selective for fructose in competitive binding experiments, preferring fructose over glucose. It is demonstrated that design of immobilized fluorescent sensors for fructose, based on a PET mechanism, is not an easy task due to the chemical and spectral changes experienced by the fluorescent probe upon immobilization. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Baja California MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Analytical;Electrochemistry;Instruments & Instrumentation U5 - J;Article AV - English IS - 0925-4005 UR - ISI:000182277100039 L2 - chemosensor;fructose;photoinduced electron transfer;fluorescence;WATER; LUMINESCENCE; SYSTEMS; ACID SO - Sensors and Actuators B-Chemical 2003 ;90(1-3):256-263 8648 UI - 8520 AU - Lopez GV AU - Quezada J AU - Berman GP AU - Doolen GD AU - Tsifrinovich VI AD - Univ Guadalajara, Dept Fis, Guadalajara, Jalisco, MexicoLos Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAPolytech Univ, Metrotech Ctr 6, Brooklyn, NY 11201, USALopez, GV, Univ Guadalajara, Dept Fis, Corregidora 500,SR 4420, Guadalajara, Jalisco, Mexico TI - Numerical simulation of a quantum controlled-not gate implemented on four-spin molecules at room temperature AB - We study numerically the non-resonant effects on four-spin molecules at room temperature with the implemented quantum controlled-not gate and using the 2pik method. The four nuclear spins in each molecule represent a four-qubit register. The qubits interact with each other through Ising-type interaction which is characterized by the coupling constant J(a,b). We study the errors on the reduced density matrix as a function of the Rabi frequency, Omega, using the 2pik method and when all the coupling constants are equal or when one of them is different from the others MH - Mexico|Jalisco MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000182803400047 L2 - quantum computing;quantum communication;controlled-not gate;COMPUTATION; COMPUTER; DECOHERENCE; RESONANCE SO - Journal of Optics B-Quantum and Semiclassical Optics 2003 ;5(2):184-189 8649 UI - 8677 AU - Lopez M AU - Sivinski J AU - Rendon P AU - Holler T AU - Bloem K AU - Copeland R AU - Trostle M AU - Aluja M AD - Lab Aurora, Programa MOSCAMED, Guatemala City 01013, GuatemalaARS, USDA, CMAVE, Gainesville, FL 32604, USAUSDA, APHIS, PPQ, CPHST, Guatemala City 01013, GuatemalaUSDA, APHIS, PPQ CPHST, Gainesville, FL 32608, USAFlorida A&M Univ, Ctr Biol Control, USDA, APHIS,PPQ,CPHST,NBCI, Tallahassee, FL 32307, USAInt Ctr Insect Physiol & Ecol, Nairobi, KenyaTexas A&M Univ, Dept Entomol, College Stn, TX 77843, USAInst Ecol AC, Xalapa 91000, Veracruz, MexicoLopez, M, Lab Aurora, Programa MOSCAMED, Ave Hincapie & 18 Calle Zona 13, Guatemala City 01013, Guatemala TI - Colonization of Fopius ceratitivorus, a newly discovered African egg-pupal parasitoid (Hymenoptera : Braconidae) of Ceratitis capitata (Diptera : Tephritidae) AB - Fopius ceratitivorus Wharton is a recently discovered braconid parasitoid of the Mediterranean fruit fly (= medfly), Ceratitis capitata (Wied.). Unlike other parasitoids previously used in medfly biological control, F. ceratitivorus was originally collected from medfly in its purported region of origin, east Africa. Shipments of Ceratitis spp. pupae from Kenya to a newly constructed quarantine facility in Guatemala yielded both F. ceratitivorus and its congener F. caudatus (Szepligeti). Only the former species was successfully colonized through the use of medfly infested coffee berries. In the process of colonization it was determined that F. ceratitivorus oviposited into the eggs and recently hatched larvae of medflies and completed development in the hosts' puparia. This is a relatively rare behavior among fruit fly parasitoids and, because tephritid eggs near the surface of fruits are particularly vulnerable to attack, one that might contribute to its success as a biological control agent MH - Guatemala MH - Kenya MH - Mexico|Veracruz MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000182364700008 L2 - biological control;mass-rearing;medfly;LONGICAUDATA ASHMEAD HYMENOPTERA; BIOLOGICAL-CONTROL; LARVAL-PUPAL; FRUIT-FLY; ANASTREPHA; MEXICO; COFFEE SO - Florida Entomologist 2003 ;86(1):53-60 8650 UI - 7371 AU - Lopez MJ AU - Luna P AD - St Elizabeths Med Ctr, Boston, MA, USATufts Univ, Sch Med, Boston, MA 02111, USAIMSS, Ctr Med Nacl, Hosp Oncol, Mexico City, DF, Mexico TI - Composite pelvic exenteration: Is it worthwhile? MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Surgery U5 - J;Meeting Abstract AV - English IS - 1068-9265 UR - ISI:000184429300095 SO - Annals of Surgical Oncology 2003 ;10(1):S37-S37 8651 UI - 8315 AU - Lopez N AU - Cuzon G AU - Gaxiola G AU - Taboada G AU - Valenzuela M AU - Pascual C AU - Sanchez A AU - Rosas C AD - UNAM, Grp Biol Marina Expt, Fac Ciencias, Campeche, MexicoUniv Centroamericana, Managua, NicaraguaIFREMER, COP, Tahiti, Fr PolynesiaRosas, C, UNAM, Grp Biol Marina Expt, Fac Ciencias, Apdo Post 69,Cd Carmen, Campeche, Mexico TI - Physiological, nutritional, and immunological role of dietary beta 1-3 glucan and ascorbic acid 2-monophosphate in Litopenaeus vannamei juveniles AB - The present study was designed to determine the effect of dietary beta 1-3 glucan (BG) and a megadose of vitamin C on the nutrition (growth and survival, blood glucose, lactate, acylglycerides, cholesterol, hemocyanin [He], digestive gland glycogen [DGG]) and the immunological system (blood cells, prophenoloxidase [ProPO]) in Litopenaeus vannamei juveniles. Each treatment was replicated five times. Nutritional condition and immunological response of shrimp were recorded after 40 days of feeding with specific diets and during 48 h after a salinity shock (35-0parts per thousand). A significantly greater growth rate was observed in shrimp fed with BG or vitamin. C diets than in the control group. Higher blood protein, total blood cells, granular cells, and ProPO activity were recorded in shrimp fed with vitamin C as compared to the remaining treatments. That means that BG was degraded in the digestive gland by beta-glucanases to produce energy, permitting the use of more proteins for growth, whereas vitamin C was used to improve animal health, enhancing general metabolism in shrimp. The salinity stress induced a rapid use of reserves, triacylglycerols (TAGs), and cholesterol were reduced in blood and probably used as a source of energy or synthesis in the digestive gland. The increase in digestive gland glycogen 24 h after the salinity shock evidenced the use of these reserves by shrimp fed with all diets. In general, after the salinity, shock blood cells increased in shrimp fed with glucans and decreased in shrimp fed with vitamin C, whereas ProPO decreased in all shrimp after the salinity shock. This could mean that after the salinity, shock shrimp fed with glucans could synthesize cells and ProPO, whereas in shrimp fed with vitamin C, blood cells were just used to respond to the stress. After the salinity shock, an increment in the ProPO/granular cell ratio was observed in shrimp fed with vitamin C, indicating that these shrimp could rapidly increase the components of their immune system. In contrast, a continuous reduction in ProPO/granular cell ratio was observed in shrimp fed with glucans, revealing that with this type of immunostimulant, shrimp drive their immunological equipment to respond continuously to the stress. These results could explain why shrimp fed with immunostimulants presents immunological fatigue in contrast to shrimp fed with additives that improve their nutritional status, like vitamin C. (C) 2003 Elsevier Science B.V. All rights reserved MH - Fr Polynesia MH - Mexico|Campeche MH - Nicaragua PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000183259300017 L2 - beta-glucans;vitamin C;L. vannamei;shrimp;immune response;growth rate;physiological response;SHRIMP PENAEUS-MONODON; TIGER SHRIMP; VITAMIN-C; PHENOLOXIDASE ACTIVITY; DISEASE RESISTANCE; CLOTTING PROTEIN; CARBOHYDRATE; PROPHENOLOXIDASE; STYLIROSTRIS; METABOLISM SO - Aquaculture 2003 ;224(1-4):223-243 8652 UI - 7275 AU - Lopez RH AU - Vidales AM AU - Zgrablich G AD - Univ Nacl San Luis, CONICET, Dept Fis, RA-5700 San Luis, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City, DF, MexicoLopez, RH, Univ Nacl San Luis, CONICET, Dept Fis, Chacabuco 917, RA-5700 San Luis, Argentina TI - Fractal properties of correlated invasion percolation patterns AB - We present results on Monte Carlo simulations for invasion percolation with trapping considering the presence of spatial size correlations, a problem which is relevant to multiphase flow in field scale of porous media. The correlations are generated through the dual site bond model, characterized by a spatial correlation length r(o), which depends on the overlap between site and bond distributions. Our results indicate that in two-dimensional lattices the fractal dimension of the sample-spanning cluster, is non-universal and vary with the correlation. Comparison with other authors recent findings is presented. (C) 2003 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000185687900016 L2 - percolation phenomena;clusters;fractal dimension;SURFACES SO - Physica A-Statistical Mechanics and Its Applications 2003 ;327(1-2):76-81 8653 UI - 7226 AU - Lopez S AU - Dominguez CA AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92607, USADominguez, CA, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, AP 70-275, Mexico City 04510, DF, Mexico TI - Sex choice in plants: facultative adjustment of the sex ratio in the perennial herb Begonia gracilis AB - Sex allocation theory predicts that reproducing individuals will increase their fitness by facultatively adjusting their relative investment towards the rarer sex in response to population shifts in operational sex ratio (OSR). The evolution of facultative manipulation of sex ratio depends on the ability of the parents to track the conditions favouring skewed sex allocation and on the mechanism controlling sex allocation. In animals, which have well-developed sensorial mechanisms, facultative adjustment of sex ratios has been demonstrated on many occasions. In this paper, we show that plants have mechanisms that allow them to evaluate the population OSR. We simulated three different conditions of population OSR by manipulating the amount of pollen received by the female flowers of a monoecious herb, and examined the effect of this treatment on the allocation to male vs. female flowers. A shortage of pollen on the stigmas resulted in a more male-skewed sex allocation, whereas plants that experienced a relatively pollen rich environment tended to produce a more female-skewed sex allocation pattern. Our results for Begonia gracilis demonstrate that the individuals of this species are able to respond to the levels of pollination intensity experienced by their female flowers and adjust their patterns of sex allocation in accordance to the expectations of sex allocation theory MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1010-061X UR - ISI:000185988000012 L2 - Begonia;deceit pollination;facultative sex allocation;sex choice;sex ratio;ALLOCATION THEORY; SELECTION; GENDER; HERMAPHRODITE; CLEISTOGAMY; POPULATION; STRATEGY; BIRDS; SIZE SO - Journal of Evolutionary Biology 2003 ;16(6):1177-1185 8654 UI - 8619 AU - Loria A AU - Morales JD AD - CNRS, LSS, Supelec, F-91192 Gif Sur Yvette, FranceUniv Autonoma Nuevo Leon, San Nicolas De Los Garza 66450, MexicoLoria, A, CNRS, LSS, Supelec, Plateau Moulon, F-91192 Gif Sur Yvette, France TI - On persistently exciting observers and a non-linear separation principle: application to the stabilization of a generator AB - We provide a separation principle for a class of non-linear time-varying systems. The only assumption we make on the state feedback control law is that it does not vanish as the states grow unboundedly. For the observer, we propose a design method based on the assumption that the system is transformable into a form a. ne in the unmeasured variable and a property of persistency of excitation. This assumption covers but is not restricted to the common observability condition that the vector field multiplying the unmeasured variable is separated from zero for all state values. Our separation principle relies on stability results for cascades systems MH - France MH - Mexico|Nuevo Leon PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000182467000006 L2 - TIME-VARYING SYSTEMS; GLOBAL STABILIZATION; NONLINEAR-SYSTEMS; STABILITY; FEEDBACK SO - International Journal of Control 2003 ;76(6):607-617 8655 UI - 7987 AU - Lorono-Pino MA AU - Blitvich BJ AU - Farfan-Ale JA AU - Puerto FI AU - Blanco JM AU - Marlenee NL AU - Rosado-Paredes EP AU - Garcia-Rejon JE AU - Gubler DJ AU - Calisher CH AU - Beaty BJ AD - Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropodborne & Infect Dis Lab, Ft Collins, CO 80523, USAUniv Autonoma Yucatan, Yucatan, MexicoCDCP, Ft Collins, CO, USABeaty, BJ, Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropodborne & Infect Dis Lab, Ft Collins, CO 80523 USA TI - Serologic evidence of West Nile virus infection in horses, Yucatan State, Mexico AB - Serum samples were obtained from 252 horses in the State of Yucatan, Mexico, from July to October 2002. Antibodies to West Nile virus were detected by epitope-blocking enzyme-linked immunosorbent assays in three (1.2%) horses and confirmed by plaque reduction neutralization test. We report the first West Nile virus activity in the State of Yucatan MH - USA MH - Mexico|Yucatan PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 32 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000184022300016 L2 - LINKED IMMUNOSORBENT ASSAYS; ANTIBODIES SO - Emerging Infectious Diseases 2003 ;9(7):857-859 8656 UI - 6836 AU - Lozada MC AU - Lobato CE AU - Enriquez RG AU - Ortiz B AU - Toscano RA AU - Gnecco D AU - Galindo A AU - Reynolds WF AD - Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior Mexico, Coyoacan 04510, DF, MexicoBUAP, Ctr Quim, Inst Ciencias, Puebla 72000, MexicoUniv Toronto, Dept Chem, Toronto, ON M5S 1A1, CanadaEnriquez, RG, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior Mexico, Cd Univ, Coyoacan 04510, DF, Mexico TI - Solution H-1 and C-13 NMR of new chiral 1,4-oxazepinium heterocycles and their intermediates from the reaction of 2,4-pentanedione with alpha-L-amino acids and (R)-(-)-2-phenylglycinol AB - The reaction of 2,4-pentanedione (1) with (R)-(-)-2-phenylglycine methyl ester (2), (R)-(-)-2-phenylglycinol (3) and the proteinogenic amino acids (2S,3R)-(-)-2-amino-3-hydroxybutyric acid (L-threonine) (4) and (R)-(-)-2-amino-3-mercaptopropionic acid (L-cysteine) (5) methyl esters was investigated. The corresponding enamines 6, 7 and 8 were isolated and characterized spectroscopically whereas 9, which is unstable, was transformed in situ into 13. Treatment of 7, 8 and 9 with boron trifluoride etherate afforded the new [1,4]oxazepines 10, 11 and [1,4]thiazepine (12) as their BF3O- salts. The structures of the enamines and their corresponding seven-membered heterocycles were assessed by 1D and 2D NMR spectroscopy. Variable-temperature experiments revealed different molecular mobility behavior among these heterocycles. Copyright (C) 2003 John Wiley Sons, Ltd MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000186788500001 L2 - NMR;H-1 NMR;C-13 NMR;heterocycles;oxazepines;pentanedione;amino acids SO - Magnetic Resonance in Chemistry 2003 ;41(12):975-982 8657 UI - 6989 AU - Luca F AU - Shparlinski IE AD - Univ Nacl Autonoma Mexico, Inst Matemat, Morelia, Michoacan, MexicoMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaLuca, F, Univ Nacl Autonoma Mexico, Inst Matemat, CP 58180, Morelia, Michoacan, Mexico TI - Average multiplicative orders of elements modulo n MH - Australia MH - Mexico|Michoacan PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0065-1036 UR - ISI:000186437000007 L2 - LEAST PRIME; CONJECTURE; NUMBER; VALUES SO - Acta Arithmetica 2003 ;109(4):387-411 8658 UI - 7547 AU - Luca F AU - Stanica P AD - Auburn Univ, Dept Math, Montgomery, AL 36124, USAUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoStanica, P, Auburn Univ, Dept Math, POB 244023, Montgomery, AL 36124 USA TI - On the prime power factorization of n! AB - In this paper, we prove two results. The first theorem uses a paper of Kim (J. Number Theory 74 (1999) 307) to show that for fixed primes P-1,...,P-k, and for fixed integers m(1),...,m(k), with p(i) inverted iota m(i), the numbers (e(p1) (n),..., e(Pk) (n)) are uniformly distributed modulo (m(1),...,m(k)), where e(p)(n) is the order of the prime p in the factorization of n!. That implies one of Sander's conjectures from Sander (J. Number Theory 90 (2001) 316) for any set of odd primes. Berend (J. Number Theory 64 (1997) 13) asks to find the fastest growing function f (x) so that for large x and any given finite sequence epsiloni is an element of {0, 1}, i less than or equal to f(x), there exists n < x such that the congruences e(Pi) (n) equivalent to epsilon(i) (mod 2) hold for all i less than or equal to f (x). Here, p(i) is the ith prime number. In our second result, we are able to show that f(x) can be taken to be at least c(1) (log x/(log log x)(6))(1/9), with some absolute constant c(1), provided that only the first odd prime numbers are involved. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0022-314X UR - ISI:000185143900006 L2 - EXPONENTS; PARITY SO - Journal of Number Theory 2003 ;102(2):298-305 8659 UI - 7982 AU - Luca F AU - Porubsky T AD - UNAM, IMATE, Morelia 58089, Michoacan, MexicoAcad Sci Czech Republ, Inst Comp Sci, Prague 19207 8, Czech Republic TI - The multiplicative group generated by the Lehmer numbers MH - Czech Republic MH - Mexico|Michoacan PB - AURORA: FIBONACCI ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0015-0517 UR - ISI:000184066600004 L2 - DIVISORS SO - Fibonacci Quarterly 2003 ;41(2):122-132 8660 UI - 6807 AU - Lucas PW AU - Dominy NJ AU - Riba-Hernandez P AU - Stoner KE AU - Yamashita N AU - Loria-Calderon E AU - Petersen-Pereira W AU - Rojas-Duran Y AU - Salas-Pena R AU - Solis-Madrigal S AU - Osorio D AU - Darvell BW AD - Univ Hong Kong, Dept Anat, Hong Kong, Hong Kong, Peoples R ChinaUniv Chicago, Dept Ecol & Evolut, Chicago, IL 60637, USAUniv Costa Rica, Escuela Biol, San Jose, Costa RicaUniv Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoUniv So Calif, Dept Cell & Neurobiol, Keck Sch Med, Los Angeles, CA 90089, USAUniv Sussex, Sch Biol Sci, Brighton BN1 9QG, E Sussex, EnglandUniv Hong Kong, Prince Philip Dent Sch, Fac Dent, Hong Kong, Hong Kong, Peoples R ChinaLucas, PW, Univ Hong Kong, Dept Anat, 21 Sassoon Rd, Hong Kong, Hong Kong, Peoples R China TI - Evolution and function of routine trichromatic vision in primates AB - Evolution of the red-green visual subsystem in trichromatic primates has been linked to foraging advantages, namely the detection of either ripe fruits or young leaves amid mature foliage. We tested competing hypotheses globally for eight primate taxa: five with routine trichromatic vision, three without. Routinely trichromatic species ingested leaves that were "red shifted" compared to background foliage more frequently than species lacking this trait. Observed choices were not the reddest possible, suggesting a preference for optimal nutritive gain. There were no similar differences for fruits although red-greenness may sometimes be important in close-range fruit selection. These results suggest that routine trichromacy evolved in a context in which leaf consumption was critical MH - Costa Rica MH - United Kingdom MH - Mexico|Michoacan MH - Peoples R China MH - USA PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 24 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000186885100018 L2 - cone;diet;folivory;foraging;frugivory;opsin;retina;NEW-WORLD MONKEYS; COLOR-VISION; PHOTOPIGMENT POLYMORPHISM; ACTIVITY PATTERNS; SPATIAL MEMORY; OPSIN GENE; RED; PROSIMIANS; PIGMENTS; FOLIAGE SO - Evolution 2003 ;57(11):2636-2643 8661 UI - 8937 AU - Luna-Herrera J AU - Martinez-Cabrera G AU - Parra-Maldonado R AU - Enciso-Moreno JA AU - Torres-Lopez J AU - Quesada-Pascual F AU - gadillo-Polanco R AU - Franzblau SG AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Immunol, Mexico City, DF, MexicoHosp Pediat Mexico City, Ctr Med Nacl Siglio 21, Inst Mexicano Seguro Social, Mexico City, DF, MexicoUniv Illinois, Dept Pharmacol, Chicago, IL, USALuna-Herrera, J, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Immunol, Carpio & Plan Ayala,Colonia Santo Tomas 11340, Mexico City, DF, Mexico TI - Use of receiver operating characteristic curves to assess the performance of a microdilution assay for determination of drug susceptibility of clinical isolates of Mycobacterium tuberculosis AB - The aim of this study was to apply receiver operating characteristic (ROC) analysis to the microplate Alamar blue assay, a recently developed alternative for drug susceptibility testing of mycobacteria. As this is a quantitative assay, its performance can be determined by ROC analysis, in which the area under the ROC curve represents a summary of test performance (the higher the area, the better the test's performance). Sixty isolates of Mycobacterium tuberculosis were tested by the microcolorimetric assay against six twofold dilutions of streptomycin, isoniazid, rifampin, and ethambutol. For each isolate, the susceptibility pattern was simultaneously established by the agar proportion method, the result of which represented the gold standard value for the ROC analysis. The critical concentration, area under the curve, and P value for each drug were determined by ROC curve analysis. The results of the assay were obtained in an average of 8 days of incubation. The performance of the assay was excellent for all four drugs: the area under the curves was > 0.97, the P values were 0.000, and sensitivity was 94%, specificity 97%, predictive value for resistance greater than or equal to 92%, predictive value for susceptibility 97%, and test efficiency 97%. According to ROC analysis, the microplate Alamar blue assay is a reliable method for determination of drug-susceptibility. Rapidity and cost efficiency are two additional qualities that make this test an excellent alternative for the drug susceptibility testing of Mycobacterium tuberculosis. The ROC curve analysis is a robust statistical approach for evaluating the performance of new quantitative methods for determination of drug sensitivity of Mycobacterium tuberculosis isolates MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0934-9723 UR - ISI:000181538900004 L2 - ALAMAR-BLUE ASSAY; COLORIMETRIC METHOD; FLOW-CYTOMETRY; RIFAMPIN; SYSTEM; AGENTS; AVIUM; PHAGE; MICS SO - European Journal of Clinical Microbiology & Infectious Diseases 2003 ;22(1):21-27 8662 UI - 8053 AU - Luque B AU - Miramontes O AD - Univ Politecn Madrid, Dept Matemat Aplicada & Estadist, Escuela Super Ingn Aeronaut, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, MexicoLuque, B, Univ Politecn Madrid, Dept Matemat Aplicada & Estadist, Escuela Super Ingn Aeronaut, E-28040 Madrid, Spain TI - Small worlds, mazes and random walks AB - A parametrized family of random walks whose trajectories are easily identified as graphs is presented. This construction shows small-world-like behavior but, interestingly, a power law emerges between the minimal distance L and the number of nodes N of the graph instead of the typical logarithmic scaling. We explain this peculiar finding in the light of the well-known scaling relationships in Random Walk Theory. Our model establishes a link between Complex Networks and Self-Avoiding Random Walks, a useful theoretical framework in polymer science MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000183880700002 L2 - COMPLEX NETWORKS; MODELS SO - Europhysics Letters 2003 ;63(1):8-13 8663 UI - 7887 AU - Luridiana V AU - Peimbert A AU - Peimbert M AU - Cervino M AD - CSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoINTA, Lab Astrofis Espacial & Fis Fundamental, Madrid, SpainLuridiana, V, CSIC, Inst Astrofis Andalucia, Apartado Correos 3004, E-18080 Granada, Spain TI - The effect of collisional enhancement of Balmer lines on the determination of the primordial helium abundance AB - This paper describes a new determination of the primordial helium abundance (YP), based on the abundance analysis of five metal-poor extragalactic H II regions. For three regions of the sample (SBS 0335 - 052, I Zw 18, and H29) we present tailored photoionization models based on improved calculations with respect to previous models. In particular, we use the photoionization models to study quantitatively the effect of collisional excitation of Balmer lines on the determination of the helium abundance (Y) in the individual regions. This effect is twofold: first, the intensities of the Balmer lines are enhanced with respect to the pure recombination value, mimicking a higher hydrogen abundance; second, the observed reddening is larger than the true extinction, as a result of the differential effect of collisions on different Balmer lines. In addition to these effects, our analysis takes into account the following features of H II regions: ( 1) the temperature structure, ( 2) the density structure, ( 3) the presence of neutral helium, ( 4) the collisional excitation of the He I lines, ( 5) the underlying absorption of the He I lines, and ( 6) the optical thickness of the He I lines. The object that shows the highest increase in Y after the inclusion of collisional effects in the analysis is SBS 0335 - 052, whose helium abundance has been revised by DeltaY = +0.0107. The revised Y-values for the five objects in our sample yield an increase of + 0.0035 in Y-P, giving Y-P = 0.2391 +/- 0.0020 MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000184408100015 L2 - atomic processes;galaxies : abundances;galaxies : individual (H29, I Zw 18, SBS 0335-052);galaxies : ISM;HII regions;ISM : abundances;EVOLUTIONARY SYNTHESIS MODELS; WOLF-RAYET STARS; H-II REGIONS; HII-REGIONS; X-RAY; PHOTOIONIZATION MODELS; CHEMICAL-COMPOSITION; PHYSICAL CONDITIONS; PLANETARY-NEBULAE; COMPACT GALAXIES SO - Astrophysical Journal 2003 ;592(2):846-865 8664 UI - 7495 AU - Lutter CK AU - Rivera JA AD - Pan Amer Hlth Org, Food & Nutr Program, Washington, DC 20007, USAInst Publ Hlth Mexico, Cuernavaca, Morelos, MexicoLutter, CK, Pan Amer Hlth Org, Food & Nutr Program, Washington, DC 20007 USA TI - Nutritional status of infants and young children and characteristics of their diets AB - Adoption of the recommended breast-feeding and complementary feeding behaviors and access to the appropriate quality and quantity of foods are essential components of optimal nutrition for infants and young children between ages 6 and 24 mo. Iron, zinc and vitamin B-6 are deficient in complementary food diets in Bangladesh, Ghana, Guatemala, Mexico and Peru. Low intakes of iron are consistent with a high prevalence of anemia seen in this age group. The adequacy of observed intakes for calcium, vitamin A, thiamin, folate and vitamin C depends on the age range in question and the set of requirements used in the assessment. The lipid content of many complementary food diets is low. In addition to providing essential fatty acids, lipids are needed for the absorption of fat-soluble vitamins and also enhance the texture, flavor and aroma of foods, which may lead to increased intake. The relative roles of palatability, micronutrient deficiency and morbidity-induced anorexia in the appetite of infants and young children are not known. However, even among children who were growth retarded and had a total energy deficit compared with requirements, up to 25% of food offered was not consumed. This indicates that dietary quality rather than quantity is the key aspect of complementary food diets that needs to be improved. Targeted fortification or the production of complementary foods fortified with micronutrients and of an adequate macro- and micronutrient composition is one approach to help meet nutritional requirements during the vulnerable period of 6-24 mo MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 15 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000185259100042 L2 - fortified complementary foods;complementary feeding;micronutrients;child growth;RANDOMIZED CONTROLLED TRIALS; DEVELOPING-COUNTRIES; LATIN-AMERICA; IRON-DEFICIENCY; HEALTH SURVEYS; SUPPLEMENTATION; GROWTH; CHILDHOOD; DIARRHEA; NEEDS SO - Journal of Nutrition 2003 ;133(9):2941S-2949S 8665 UI - 8599 AU - Luzon F AU - Ramirez L AU - Sanchez-Sesma FJ AU - Posadas A AD - Univ Almeria, Dept Fis Aplicada, Almeria 04120, SpainUniv Almeria, Inst Andaluz Geofis & Prevenc Desastres Sismicos, Almeria 04120, SpainUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoLuzon, F, Univ Almeria, Dept Fis Aplicada, Canada San Urbano S-N, Almeria 04120, Spain TI - Propagation of SH elastic waves in deep sedimentary basins with an oblique velocity gradient AB - The propagation of elastic waves in heterogeneous sedimentary basins under incident SH plane waves is computed using the indirect boundary element method (IBEM). We work with sedimentary basins in which the S wave velocity varies with both the horizontal and the vertical directions. We use approximate analytical expressions for the two-dimensional Green's functions of the medium with an oblique constant-gradient Wave velocity. Whereas for the homogeneous half-space, underlying the sedimentary basin, Green's functions for a homogeneous full space were used. We analyze the response of these basins by means of frequency-space diagrams, frequency-wave-number plots, synthetic seismograms, and snapshots of the displacements. Moreover, a parametric study computing a set of various cases, which have different distributions of physical properties along two dimensions of the space, was carried out. The main differences between the media, using different obliquity angles, are pointed out. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Acoustics;Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 0165-2125 UR - ISI:000182468700002 L2 - indirect boundary element method;Green's function;heterogeneous media;sedimentary basins;strong ground motion;seismology;BOUNDARY-ELEMENT METHOD; SEISMIC RESPONSE; RAYLEIGH-WAVES; ARBITRARY SHAPE; DIPPING LAYERS; GROUND MOTION; HALF-SPACE; EARTHQUAKE; SCATTERING; DEPOSITS SO - Wave Motion 2003 ;38(1):11-23 8666 UI - 7436 AU - M'Barek S AU - Mosbah A AU - Sandoz G AU - Fajloun Z AU - Olamendi-Portugal T AU - Rochat H AU - Sampieri F AU - Guijarro JI AU - Mansuelle P AU - Delepierre M AU - De Waard M AU - Sabatier JM AD - Fac Med Nord, IFR Jean Roche, CNRS, UMR 6560,Lab Biochim, F-13916 Marseille 20, FranceFac Med Nord, IFR Jean Roche, Lab Int Associe Ingn Biomol, F-13916 Marseille, FranceCEA, INSERM, Equipe Mixte 99 31, Lab Canaux Ion & Signalizat, Grenoble, FranceNatl Autonomous Univ Mexico, Inst Biotechnol, Cuernavaca, Morelos, MexicoInst Pasteur, CNRS, URA 2185, Dept Biochim Struct & Chim,Unite RMN Biomol, Paris, FranceSabatier, JM, Fac Med Nord, IFR Jean Roche, CNRS, UMR 6560,Lab Biochim, Bd Pierre Dramard, F-13916 Marseille 20, France TI - Synthesis and characterization of Pi4, a scorpion toxin from Pandinus imperator that acts on K+ channels AB - Pi4 is a 38-residue toxin cross-linked by four disulfide bridges that has been isolated from the venom of the Chactidae scorpion Pandinus imperator. Together with maurotoxin, Pi1, Pi7 and HsTx1, Pi4 belongs to the alphaKTX6 subfamily of short four-disulfide-bridged scorpion toxins acting on K+ channels. Due to its very low abundance in venom, Pi4 was chemically synthesized in order to better characterize its pharmacology and structural properties. An enzyme-based cleavage of synthetic Pi4 (sPi4) indicated half-cystine pairings between Cys6-Cys27, Cys12-32, Cys16-34 and Cys22-37, which denotes a conventional pattern of scorpion toxin reticulation (Pil/HsTx1 type). In vivo, sPi4 was lethal after intracerebroventricular injection to mice (LD50 of 0.2 mug per mouse). In vitro, addition of sPi4 onto Xenopus laevis oocytes heterologously expressing various voltage-gated K+ channel subtypes showed potent inhibition of currents from rat Kv1.2 (IC50 of 8 pM) and Shaker B (IC50 of 3 nM) channels, whereas no effect was observed on rat Kv1.1 and Kv1.3 channels. The sPi4 was also found to compete with I-125-labeled apamin for binding to small-conductance Ca2+-activated K+ (SK) channels from rat brain synaptosomes (IC50 value of 0.5 muM). sPi4 is a high affinity blocker of the Kv1.2 channel. The toxin was docked (BIGGER program) on the Kv channel using the solution structure of sPi4 and a molecular model of the Kv1.2 channel pore region. The model suggests a key role for residues Arg10, Arg19, Lys26 (dyad), Ile28, Lys30, Lys33 and Tyr35 (dyad) in the interaction and the associated blockage of the Kv1.2 channel MH - France MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000185370000011 L2 - Pi4;scorpion toxin;K+ channels;half-cystine pairings;molecular docking;BROWNIAN DYNAMICS SIMULATIONS; NANO-NMR PROBE; POTASSIUM CHANNELS; CHEMICAL-SYNTHESIS; DISULFIDE BRIDGE; BLOCKING TOXINS; HIGH-AFFINITY; CONVERGENT EVOLUTION; ALPHA-DENDROTOXIN; MOLECULAR-BASIS SO - European Journal of Biochemistry 2003 ;270(17):3583-3592 8667 UI - 6774 AU - M'Passi-Mabiala B AU - Meza-Aguilar S AU - Demangeat C AD - Univ Autonoma Sinaloa, Escuela Ciencias Fisicomatemat, Culiacan 80010, Sinaloa, MexicoUniv Marien NGouabi, Dept Phys, Brazzaville, CongoAbdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Phys & Chim Mat Strasbourg, F-67034 Strasbourg, FranceMeza-Aguilar, S, Univ Autonoma Sinaloa, Escuela Ciencias Fisicomatemat, Bldv Amer & Univ,Ciudad Univ, Culiacan 80010, Sinaloa, Mexico TI - The magnetic map of FeMn alloy thin films on Co(001) and Co/FeMn/Co(001) trilayers AB - Recent X-ray magnetic circular dichroism and magneto-optical Kerr effect performed by Matthes et al. [J. Appl. Phys. 93 (2003) 6504] on in situ layered systems of fcc Co and FeMn epitaxially grown onto Cu(0 0 1) templates as well as Co/FeMn/Co trilayers display very interesting results. Measurements showed that the magnetic moment on Fe is parallel to the Co magnetization direction whereas, for Mn the XMCD signals are small. In order to explain this behavior ab initio density functional calculations on (Fe0.5Mn0.5)(n)/Co(0 0 1) and Co/(Fe0.5Mn0.5)(n)/Co(0 0 1) have been performed for n varying from 1 to 3. Within generalized gradient corrections the Fe-Mn interfacial alloy, one monolayer thick on Co(0 0 1), with ferromagnetic coupling between Fe and Mn corresponds to the ground state whereas the same Fe-Mn monolayer in Co/FeMn/Co presents a magnetic moment of Mn opposite to that of Fe and Co. For all systems investigated we obtain a ferromagnetic polarization between Fe and Co atoms in agreement with the XMCD results. The behavior of the Mn polarization is more complex: an antiferromagnetic polarization between Mn atoms in nearest neighboring FeMn alloy plane is always obtained. (C) 2003 Elsevier B.V. All rights reserved MH - Congo MH - France MH - Italy MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000186807200025 L2 - cobalt;density functional calculations;magnetic surfaces;manganese;metal-metal interfaces;DENSITY; MN SO - Surface Science 2003 ;547(1-2):201-209 8668 UI - 8338 AU - MacDowall RJ AU - Lara A AU - Manoharan PK AU - Nitta NV AU - Rosas AM AU - Bougeret JL AD - NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCatholic Univ Amer, Washington, DC 20064, USALockheed Martin ATC, Palo Alto, CA, USAObserv Paris, Meudon, FranceMacDowall, RJ, NASA, Goddard Space Flight Ctr, Code 695, Greenbelt, MD 20771 USA TI - Long-duration hectometric type III radio bursts and their association with solar energetic particle (SEP) events AB - [1] It has recently been suggested by Cane et al. [2002] that a class of type III solar radio bursts, called type III-l, is reliably associated with intense solar energetic particle (SEP) events. They proposed that the causative electrons for these bursts are accelerated in regions of reconnecting magnetic field in the wakes of coronal mass ejections (CMEs). In this paper, we examine the durations, intensities, and other characteristics of such radio bursts in the hectometric frequency range and compare them to several groups of control events. We conclude that simple criteria, based on hectometric data alone, can identify the majority (similar to80%) of type III-l radio bursts, which are associated with >20 MeV SEP proton events, while excluding almost 100% of the control events. Detailed study of these type III-l bursts may play a significant role in a better understanding of the acceleration of SEPs and of the magnetic field evolution in the vicinity of CMEs MH - USA MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000183178000005 L2 - ACCELERATION; ELECTRONS; MHZ SO - Geophysical Research Letters 2003 ;30(12): 8669 UI - 8515 AU - Macias ER AU - Bautista F AU - Soltero JFA AU - Puig JE AU - Attane R AU - Manera O AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Guadalajara, CUCEI, Dept Ing Quim, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, CUCEI, Dept Fis, Guadalajara 44430, Jalisco, MexicoUniv Grenoble 1, INPG, CNRS, UMR 5520,Lab Rhel, F-38041 Grenoble, FranceManera, O, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - On the shear thickening flow of dilute CTAT worm-like micellar solutions AB - Dilute solutions of worm-like micelles exhibit shear thickening caused by microstructural changes under specific flow conditions. In this work, for the first time, shear thickening in parallel plate and Poiseuille flows is investigated using simultaneously particle image velocimetry (PIV) and theometry. Four distinctive zones of flow behavior are identified in parallel plates as the shear rate increases, namely, a Newtonian region, a transition regime where inhomogeneous nucleation of the shear-induced structures (SIS) is followed by homogeneous nucleation of SIS, and an apparent second-Newtonian regime at high shear rates, where rapid temporal fluctuations of the viscosity are smoothed out by inertia of the moving plate. In pipe pressure flow, PIV results reveal a flow pattern consisting of a superposition of two parabolic regions of the velocity profile located near the center and close to the pipe walls, and a transition region where again strong fluctuations in the velocity profile are observed. The experimental results are compared with predictions of a convected Maxwell constitutive equation coupled to a kinetic equation that accounts for an increase in dissipation of the system due to the presence of the SIS. The model accounts for the average steady values of the viscosity in the structured thickened state. (C) 2003 The Society of Rheology MH - France MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - MELVILLE: JOURNAL OF RHEOLOGY AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Mechanics U5 - J;Article AV - English IS - 0148-6055 UR - ISI:000182706100004 L2 - SURFACTANT SOLUTIONS; PHASE-TRANSITIONS; WATER SYSTEM; BEHAVIOR; MODEL; BIREFRINGENCE; SCATTERING; VISCOMETER; DYNAMICS; RHEOLOGY SO - Journal of Rheology 2003 ;47(3):643-658 8670 UI - 6550 AU - Macias JL AU - Arce JL AU - Mora JC AU - Espindola JM AU - Saucedo R AU - Manetti P AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Florence, Dipartimento Sci Terra, I-50121 Florence, ItalyMacias, JL, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - A 550-year-old plinian eruption at El Chichon Volcano, Chiapas, Mexico: Explosive volcanism linked to reheating of the magma reservoir AB - [1] Some 550 years ago (1320 - 1433 A. D.), a powerful Plinian eruption at El Chichon Volcano in southern Mexico produced a widespread pumice fall deposit. We subdivided the deposit into three parts on the basis of structural and textural characteristics, pumice lithology and density, granulometry, and petrologic-geochemical attributes. The deposit covers an area of 1500 km(2) within the 1-cm isopach and has a minimum estimated bulk volume of 2.8 km(3) (1.1 km(3) dense rock equivalent (DRE)); its eruptive column reached an altitude of similar to31 km. Consideration of field evidence, the presence and nature of mafic enclaves, and chemical data strongly suggest that the 550 year B. P. eruption is linked with the intrusion of a high-temperature basaltic magma into preexisting but stagnated trachyandesitic magma beneath El Chichon. Thorough mixing of the two magmas produced a compositionally uniform hybrid trachyandesite magma (average SiO2 55.3 wt %), which subsequently underwent crystal growth and gas exsolution, ultimately overpressurizing the zoned magmatic system to erupt explosively. On the basis of El Chichon's known eruptive history, the intrusion-mixing event occurred sometime after the 900 year B. P. eruption. The hybrid magma had a preeruption temperature of 820 - 830 degreesC and was water undersaturated (5 - 6 wt % H2O) at pressures of similar to 2 - 2.5 kbar MH - Italy MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000187866300005 L2 - Holocene;Plinian eruption;magma;mixing;El Chichon Volcano;Mexico;MOUNT-ST-HELENS; FE-TI OXIDES; EXPERIMENTAL CONSTRAINTS; PYROCLASTIC DEPOSITS; FALL DEPOSITS; SULFUR; HOLOCENE; TRACHYANDESITE; RECALCULATION; SYSTEMATICS SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B12): 8671 UI - 7111 AU - mada-Ruiz E AU - Martinez-Tellez MA AU - Hernandez-Alamos MM AU - Vallejo S AU - Primo-Yufera E AU - Vargas-Arispuro I AD - Ctr Invest & Alimnetac Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia, SpainVargas-Arispuro, I, Ctr Invest & Alimnetac Desarrollo, AC Carr Victoria Km 0-6,Apdo Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Fungicidal potential of methoxylated flavones from citrus for in vitro control of Colletotrichum gloeosporioides, causal agent of anthracnose disease in tropical fruits AB - Four polymethoxylated flavones (3,5,6,7,3',4'-hexamethoxyflavone, 3,5,6,7,8,3',4'-heptamethoxyflavone, 5,6,7,8,4'-pentamethoxyflavone and 5,6,7,8,3',4'-hexamethoxyflavone) were isolated and characterized from cold-pressed orange oil. Their antifungal activities were evaluated against Colletotrichum gloeosporioides (Penz) Penz & Sacc, a major plant pathogen of fruits that causes significant damage to crops in tropical, sub-tropical and temperate regions. Methoxylated flavones were effective in inhibiting mycelial growth of the fungus. As flavone concentration increased, mycelial growth decreased. 5,6,7,8,3',4'-Hexamethoxyflavone completely inhibited the growth of C gloeosporioides at a concentration of 100 mug ml(-1). (C) 2003 Society of Chemical Industry MH - Mexico|Sonora MH - Spain PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Entomology U5 - J;Article AV - English IS - 1526-498X UR - ISI:000186248900011 L2 - natural products;crop-protection agents;antifungal activity;Colletotrichum gloeosporioides;polymethoxylated flavones;ACUTATUM; PLANTS SO - Pest Management Science 2003 ;59(11):1245-1249 8672 UI - 6954 AU - Magnusson V AU - Johanneson B AU - Lima G AU - arcon-Segovia D AU - arcon-Riquelme ME AD - Univ Uppsala, S-75105 Uppsala, SwedenInst Nacl Ciencias Med & Nutr, Mexico City, DF, Mexico TI - Both risk alleles for FcgRIIA and FcgRIIIA are susceptibility factors for SLE: A unifying hypothesis MH - Mexico|Distrito Federal MH - Sweden PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801052 SO - Arthritis and Rheumatism 2003 ;48(9):S408-S408 8673 UI - 6703 AU - Magris C AU - Binette L AU - Bruzual G AD - Ctr Invest Astron, Merida 5101A, VenezuelaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoMagris, C, Ctr Invest Astron, Apartado Postal 264, Merida 5101A, Venezuela TI - ADEMIS: A library of evolutionary models for emission-line galaxies. I. dust-free models AB - We present an extensive set of stellar population synthesis models, which self-consistently include the (optical - far- UV) continuum emission from stars as well as the resulting emission-line spectrum from photoionized gas surrounding massive stars during their main-sequence lifetime. The models are presented as a compiled library, ADEMIS, available electronically. ADEMIS contains the equivalent widths and the intensities of the lines [O II] lambdalambda3727, Hbeta, [O III] lambda5007, Halpha, and [N II] lambda6584, which were calculated assuming a metallicity of 0.2, 0.4, 1.0, and 1.5 Z(.) and a wide range of ionization parameters. We investigate the regime of continuous star formation, assuming a Salpeter initial mass function, whose upper mass limit is an input parameter. The calculated equivalent width models, which are function of the burst age, are compared with the Jansen et al. atlas of integrated spectra for nearby galaxies. We reproduce the observed properties of galaxies along the full Hubble sequence and suggest how the metallicity and age of such galaxies might be roughly estimated MH - Mexico|Distrito Federal MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000187287100003 L2 - galaxies : general;galaxies : starburst;HII regions;stars : formation;NEARBY FIELD GALAXIES; STAR-FORMING GALAXIES; SPIRAL GALAXIES; COMPOSITION GRADIENTS; PHYSICAL CONDITIONS; STARBURST GALAXIES; ELLIPTIC GALAXIES; NEBULAR EMISSION; ORION NEBULA; SKY-SURVEY SO - Astrophysical Journal Supplement Series 2003 ;149(2):313-326 8674 UI - 8535 AU - Mahalingam R AU - Gomez-Buitrago A AU - Eckardt N AU - Shah N AU - Guevara-Garcia A AU - Day P AU - Raina R AU - Fedoroff NV AD - Penn State Univ, Life Sci Consortium, University Pk, PA 16802, USAPenn State Univ, Dept Biol, University Pk, PA 16802, USAPenn State Univ, Integrat Biosci Grad Degree Program, University Pk, PA 16802, USAAmer Soc Plant Biologists, Rockville, MD 20855, USAUNAM, Inst Biotechnol, Cuernavaca 66271, Morelos, MexicoFedoroff, NV, Penn State Univ, Life Sci Consortium, University Pk, PA 16802 USA TI - Characterizing the stress/defense transcriptome of Arabidopsis AB - Background: To understand the gene networks that underlie plant stress and defense responses, it is necessary to identify and characterize the genes that respond both initially and as the physiological response to the stress or pathogen develops. We used PCR-based suppression subtractive hybridization to identify Arabidopsis genes that are differentially expressed in response to ozone, bacterial and oomycete pathogens and the signaling molecules salicylic acid (SA) and jasmonic acid. Results: We identified a total of 1,058 differentially expressed genes from eight stress cDNA libraries. Digital northern analysis revealed that 55% of the stress-inducible genes are rarely transcribed in unstressed plants and 17% of them were not previously represented in Arabidopsis expressed sequence tag databases. More than two-thirds of the genes in the stress cDNA collection have not been identified in previous studies as stress/defense response genes. Several stress-responsive cis-elements showed a statistically significant over-representation in the promoters of the genes in the stress cDNA collection. These include W- and G-boxes, the SA-inducible element, the abscisic acid response element and the TGA motif. Conclusions: The stress cDNA collection comprises a broad repertoire of stress-responsive genes encoding proteins that are involved in both the initial and subsequent stages of the physiological response to abiotic stress and pathogens. This set of stress-, pathogen- and hormone-modulated genes is an important resource for understanding the genetic interactions underlying stress signaling and responses and may contribute to the characterization of the stress transcriptome through the construction of standardized specialized arrays MH - USA MH - Mexico|Morelos PB - LONDON: BIOMED CENTRAL LTD RP - NOT IN FILE U3 - TC 62 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 1465-6914 UR - ISI:000182694200009 L2 - SYSTEMIC ACQUIRED-RESISTANCE; CHALCONE SYNTHASE PROMOTER; POLYMERASE CHAIN-REACTION; GENE-EXPRESSION PROFILES; PLANT-DISEASE RESISTANCE; ZINC-FINGER PROTEIN; SALICYLIC-ACID; MESSENGER-RNA; G-BOX; SIGNAL-TRANSDUCTION SO - Genome Biology 2003 ;4(3): 8675 UI - 8692 AU - Mahalingam T AU - Chitra JSP AU - Ravi G AU - Chu JP AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaNatl Taiwan Ocean Univ, Inst Mat Engn, Chilung 202, TaiwanAlagappa Univ, Dept Crystal Growth, Karaikkudi 630003, Tamil Nadu, IndiaUNAM, Solar Hydrogen Fuel Cell Grp, Energy Res Ctr, Temixco 62580, Morelos, MexicoMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Characterization of pulse plated Cu2O thin films AB - Cuprous oxide (Cu2O) thin films are synthesised on Cu and tin oxide coated substrates by electrochemical pulse plating technique. The effect of current density and duty cycle on the growth of Cu2O films is studied. Structural studies reveal an optimum duty cycle of 33% to deposit well-crystallized Cu2O film. The effect of deposition parameters on the structural and optical properties are carried out. It is observed that annealing below 350 degreesC improved the crystallinity and grain size Of Cu2O films whereas annealing above 450 degreesC exhibited the conversion Of Cu2O into CuO. Photoelectrochemical solar cell studies showed improved performance for Cu2O electrodes and the results are discussed. (C) 2003 Elsevier Science BX All rights reserved MH - India MH - Mexico|Morelos MH - Taiwan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000182195800002 L2 - cuprous oxide film;pulse plating technique;annealing studies;etching studies;photoelectrochemical solar cells;GALVANOSTATIC DEPOSITION; OXIDE; CELL SO - Surface & Coatings Technology 2003 ;168(2-3):111-114 8676 UI - 9083 AU - Mahalingam T AU - John VS AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaUNAM, Solar Hydrogen Fuel Cell Grp, Energy Res Ctr, Temixco 62580, Morelos, MexicoTDMNS Coll, Dept Phys, T Kallikulam 627113, Tamil Nadu, IndiaJohn, VS, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Growth and characterization of electrosynthesised zinc oxide thin films AB - Zinc oxide (ZnO) films have been electrodeposited from an aqueous solution containing 0.1 M zinc nitrate as the electrolyte with pH around 5 +/- 0.1. The deposition was carried out by galvanostatic reduction with an applied cathodic current density in the range between 5 and 20 mA cm(-2). The influence of bath composition on the preparation of ZnO films is studied. The effects of zinc nitrate concentration and cathodic current density on the deposition rate of ZnO films were also studied. An optimum current density of 10 mA cm(-2) is identified for the growth of ZnO film with improved crystallinity and optical transmittance. The crystalline structure of the deposits studied by X-ray diffraction reveals the possibility of growing hexagonal ZnO films under suitable electrochemical conditions. The surface morphological studies by scanning electron micrographs revealed the presence of nodular appearance for films deposited at 800 degreesC bath temperatures. (C) 2002 Published by Elsevier Science Ltd MH - India MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000181178900010 L2 - thin films;chemical synthesis;x-ray diffraction;optical properties;semiconductivity;ZNO FILMS; ELECTROLYSIS; TRANSPARENT; DEVICES SO - Materials Research Bulletin 2003 ;38(2):269-277 8677 UI - 8029 AU - Mahler DA AU - Ward J AU - Mejia-Alfaro R AD - Dartmouth Hitchcock Med Ctr, Sect Pulm & Crit Med, Lebanon, NH 03756, USANatl Inst Resp Dis, Mexico City, DF, MexicoMahler, DA, Dartmouth Hitchcock Med Ctr, Sect Pulm & Crit Med, 1 Med Ctr Dr, Lebanon, NH 03756 USA TI - Stability of dyspnea ratings after exercise training in patients with COPD AB - Stability of Dyspnea Ratings after Exercise Training in Patients with COPD. Med. Sci. Sports Exerc., Vol. 35, No. 7, pp. 1083-1087, 2003. Purpose: The purpose of this study was to examine whether patients with chronic obstructive pulmonary disease (COPD) would report similar ratings of dyspnea at the same relative exercise intensity after participation in pulmonary rehabilitation. Methods: Forty-two patients with COPD performed incremental cardiopulmonary exercise testing before and after completion of a 6-wk exercise-training program. Subjects rated dyspnea on the 0-10 category-ratio (CR-10) scale each minute of the exercise test. Results: Both responders (21 patients who exhibited an increase in V(overdot)O-2peak after pulmonary rehabilitation) and nonresponders (21 patients who had no increase in V(overdot)O-2peak) reported slightly lower ratings of dyspnea (similar to0.5 on the CR-10 scale) at the same relative (50% and 75% of V(overdot)O-2peak) exercise intensities. These changes in dyspnea ratings after pulmonary rehabilitation were not significantly different between responders and nonresponders. Conclusion: The study suggests that patients with COPD can use the same ratings of dyspnea to monitor training at the same relative exercise intensity whether they achieve a physiological training response or not MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Sport Sciences U5 - J;Article AV - English IS - 0195-9131 UR - ISI:000183958900003 L2 - chronic obstructive pulmonary disease;ratings of dyspnea;pulmonary rehabilitation;PERCEIVED EXERTION; PULMONARY REHABILITATION; INTENSITY; ADULTS; VALUES SO - Medicine and Science in Sports and Exercise 2003 ;35(7):1083-1087 8678 UI - 7249 AU - Maiolino R AU - Juarez Y AU - Mujica R AU - Nagar NM AU - Oliva E AD - Osserv Astrofis Arcetri, INAF, I-50125 Florence, ItalyInst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoUniv Groningen, Kapteyn Inst, NL-9747 AD Groningen, NetherlandsTelescopio Nazl Galileo, Santa Cruz De La Palma 38700, SpainMaiolino, R, Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy TI - Early star formation traced by the highest redshift quasars AB - The iron abundance relative to alpha-elements in the circumnuclear region of quasars is regarded as a clock of the star formation history and, more specifically, of the enrichment by Type Ia supernovae. We investigate the iron abundance in a sample of 22 quasars in the redshift range 3.0 < z < 6.4 by measuring their rest-frame UV Fe II bump, which is shifted into the near-IR, and by comparing it with the Mg II lambda2798 flux. The observations were performed with a device that can obtain near-IR spectra in the range 0.8 - 2.4 mum in one shot, thereby enabling an optimal removal of the continuum underlying the Fe II bump. We detect iron in all quasars including the highest redshift (z = 6.4) quasar currently known. The uniform observational technique and the wide redshift range allow a reliable study of the trend of the Fe II/ Mg II ratio with redshift. We find that the Fe II/ Mg II ratio is nearly constant at all redshifts, although there is marginal evidence for a higher Fe II/ Mg II ratio in the quasars at z similar to 6. If the Fe II/ Mg II ratio reflects the Fe/alpha abundance, this result suggests that the z similar to 6 quasars have already undergone a major episode of iron enrichment. We discuss the possible implications of this finding for the star formation history at z > 6. We also detect a population of weak iron emitters at z similar to 4.5, which are possibly hosted in systems that evolved more slowly. Alternatively, the trend of the Fe II/ Mg II ratio at high redshift may reflect significantly different physical conditions of the circumnuclear gas in such high-redshift quasars MH - Italy MH - Mexico|Puebla MH - Netherlands MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185916100008 L2 - galaxies : evolution;galaxies : high-redshift;quasars : emission lines;DIGITAL SKY SURVEY; IRON EMISSION; HOST GALAXIES; QSOS; DISCOVERY; EVOLUTION; UNIVERSE; RATIOS SO - Astrophysical Journal 2003 ;596(2):L155-L158 8679 UI - 8896 AU - Maldonado-Montiel TDNJ AU - Rodriguez-Canche LG AU - Olvera-Novoa MA AD - Univ Autonoma Campeche, Ctr Estudios Desarrollo Sustentable & Aprovechami, Campeche 24030, MexicoUniv Autonoma Campeche, Fac Ciencias Quim Biol, Campeche 24030, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Merida, VenezuelaRodriguez-Canche, LG, Univ Autonoma Campeche, Ctr Estudios Desarrollo Sustentable & Aprovechami, Av Agustin Melgar S-N, Campeche 24030, Mexico TI - Evaluation of Artemia biomass production in San Crisanto, Yucatan Mexico, with the use of poultry manure as organic fertilizer AB - The main objective of aquaculture is to obtain high yields to improve the cost-benefit relationship. Organic fertilizers are considered cheap inputs that may contribute to improving crop yields; however, responses to these fertilizers can vary not only due to their own characteristics, but also to environmental conditions at the location, salinity and handling given to these wastes. In the present work, we evaluated nitrogen and phosphorus levels resulting from 24, 48 and 72 h decomposition of five doses of poultry manure (2.67, 5.33, 10.67, 16 and 20 g l(-1), equivalent to 100, 200, 400, 600 and 750 kg ha(-1) (kg/10(7) l), respectively) in seawater (experiment 1). The highest quantity of nitrogen in the water was obtained with 2.67 g of fertilizer at 24 h of decomposition. The highest amounts of phosphorus were obtained with 5.33 g of fertilizer at 24 and 48 h. Based on these results, it was decided to evaluate the 2.67 and 5.33 g concentrations of poultry manure in the production of Artemia spp. biomass in earthen ponds (experiment 2). The highest biomass quantities (457.0 and 467.33 g 4000 l(-1)) were obtained with both concentrations of fertilizer (2.67 and 5.33 g, respectively) at 55 days of the trial. Biomass production in control ponds was always lower than that obtained in fertilized experimental units. The mean biomass production of the I I evaluations recorded was not statistically different between the two doses of fertilizer (P > 0.05), but these were significantly different from the control. The lowest apparent feed conversion ratio (AFCR=0.88) was obtained with the lowest concentration of fertilizer (2.67 g). Therefore, the best amount of fertilizer for Artemia biomass production under proposed experimental conditions is 2.67 g of fertilizer, equivalent to 100 kg ha(-1). The use of poultry manure as fertilizer in Artemia culture could contribute to diversifying productive activities in the coastal zone of Yucatan and to partially satisfying the demand for this source in the region. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Campeche MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000181802700042 L2 - Artemia;organic fertilizer;poultry manure;brine shrimp;YIELD SO - Aquaculture 2003 ;219(1-4):573-584 8680 UI - 7287 AU - Maldonado-Rodriguez R AU - Espinosa-Lara M AU - Barrera-Leon O AU - Colin-Tovar C AU - Gonzalez-Yebra B AU - Salcedo-Vargas M AU - Santiago-Hernandez JC AU - Mendez-Tenorio A AU - Beattie KL AD - IMSS, CNM SXXI, Hosp Cancerol, Mexico City, DF, MexicoIPN, CINVESTAV, Mol Biochem Dept, Mexico City, DF, MexicoOak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831, USAMaldonado-Rodriguez, R, IPN, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, Mexico TI - Detection of mutations in RET proto-oncogene codon 634 through double tandem hybridization AB - We developed a procedure to detect the 7 point mutations at Cys634 of the proto-oncogene RET, which is responsible for medullary thyroid carcinoma (MTC). Genomic DNA was prepared from blood samples obtained from normal and MTC-affected individuals belonging to a family with a history of the disease. The RET genotype for each individual was first established by performing restriction and sequencing analyses. Single-stranded target DNA was prepared by asymmetric polymerase chain reaction (PCR) amplification of a 93-bp fragment containing Cys634. The target was annealed with pairs of prelabeled stacking oligonucleotides designed to create appropriate 7-nucleotide gaps, which served as the sites of subsequent hybridization with glass-immobilized 7-mer probes. The target-stacking oligonucleotide duplexes were hybridized with DNA chips containing a set of eight 7-mer probes designed to detect the wild-type sequence and the seven point mutations described. We tested two sets of immobilized probes containing internal or 5'-terminal codon-634 single-base variations. Both groups of probes were able to discriminatively identify the mutations. The hybridization patterns indicated that the disease in this family was due to the C634Y mutation, in accord with the original sequence analysis. The hybridization-based mutation assignment was additionally supported by determination of the control homozygous and heterozygous hybridization patterns produced with synthetic targets having the normal or codon 634 mutant sequences. The effects of mismatch type and nearest-neighbor sequences on the occurrence of false-positive (mismatched) hybridizations are discussed MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1073-6085 UR - ISI:000185796700002 L2 - DNA chips;mutation detection;DNA probes;mismatched hybridization;CENTER-DOT-A; NEAREST-NEIGHBOR THERMODYNAMICS; TETHERED OLIGONUCLEOTIDE PROBES; MEDULLARY-THYROID CARCINOMA; STACKING HYBRIDIZATION; MASS-SPECTROMETRY; GENE-EXPRESSION; T MISMATCHES; DNA; ARRAYS SO - Molecular Biotechnology 2003 ;25(2):113-129 8681 UI - 9469 AU - Mallen-Ornelas G AU - Seager S AU - Yee HKC AU - Minniti D AU - Gladders MD AU - Mallen-Fullerton GM AU - Brown TM AD - Princeton Univ Observ, Princeton, NJ 08544, USAPontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, ChileInst Adv Study, Princeton, NJ 08540, USAUniv Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H8, CanadaUniv Eberoamericana, Mexico City 01200, DF, MexicoNatl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307, USAMallen-Ornelas, G, Princeton Univ Observ, Peyton Hall, Princeton, NJ 08544 USA TI - The EXPLORE project. I. A deep search for transiting extrasolar planets AB - Planet transit searches promise to be the next breakthrough for extrasolar planet detection and will bring the characterization of short-period planets into a new era. Every transiting planet discovered will have a measured radius, which will provide constraints on planet composition, evolution, and migration history. Together with radial velocity measurements, the absolute mass of every transiting planet will be determined. In this paper we discuss the design considerations of the Extrasolar Planet Occultation Research (EXPLORE) project, a series of transiting planet searches using 4 m class telescopes to continuously monitor a single field of stars in the Galactic plane in each similar to2 week observing campaign. We discuss the general factors that determine the efficiency and the number of planets found by a transit search, including time sampling strategy and field selection. The primary goal is to select the most promising planet candidates for radial velocity follow-up observations. We show that with very high photometric precision light curves that have frequent time sampling and at least two detected transits, it is possible to uniquely solve for the main parameters of the eclipsing system (including planet radius), based on several important assumptions about the central star. Together with a measured spectral type for the star, this unique solution for orbital parameters provides a powerful method for ruling out most contaminants to transiting planet candidates. For the EXPLORE project, radial velocity follow-up observations for companion mass determination of the best candidates are done on 8 m class telescopes within 2 or 3 months of the photometric campaigns. This same-season follow-up is made possible by the use of efficient pipelines to produce high-quality light curves within weeks of the observations. We conclude by presenting early results from our first search, EXPLORE I, in which we reached better than 1% rms photometric precision (measured over a full night) on similar to37,000 stars with 14.5less than or equal toIless than or equal to18.2 MH - USA MH - Canada MH - Chile MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000180282700046 L2 - planetary systems;surveys;techniques : photometric;PHOTOMETRIC-METHOD; IMAGE-ANALYSIS; SOLAR PLANETS; COMPANION; SYSTEMS; BULGE; STAR SO - Astrophysical Journal 2003 ;582(2):1123-1140 8682 UI - 7235 AU - Mallinson DJ AU - Flower B AU - Hine A AU - Brooks G AU - Garza RM AD - E Carolina Univ, Dept Geol, Greenville, NC 27858, USAUniv S Florida, Coll Marine Sci, St Petersburg, FL 33701, USAEckerd Coll, Dept Marine Sci, St Petersburg, FL 33705, USAUNAM, Unidad Ciencias Tierra, Mexico City 76230, DF, MexicoMallinson, DJ, E Carolina Univ, Dept Geol, 101 Graham Bldg, Greenville, NC 27858 USA TI - Paleoclimate implications of high latitude precession-scale mineralogic fluctuations during early Oligocene Antarctic glaciation: the Great Australian Bight record AB - Sediments from ODP Site 1128 in the Great Australian Bight record isotopic and mineralogic variations corresponding to orbital parameters and regional climate change during the early Oligocene climate transition and Oil glacial event. Bulk carbonate stable isotope analyses reveal prominent positive oxygen and carbon isotope shifts related to the inferred major increase in glaciation at approximately 33.6 to 33.48 Ma. The oxygen isotope excursion corresponds to a prolonged period of low eccentricity, suggesting ice-sheet growth during low seasonality conditions. The clay mineralogy is dominated by smectite throughout. The exclusive occurrence of highly crystalline smectite from 33.6 to 33.5 Ma suggests the occurrence of explosive volcanism that correlates with the positive oxygen isotope shift. The dominance of mixed-layer smectite from 33.5 to 33.4 Ma and an increase in illite following 33.4 Ma indicates a transition from cool, wet conditions to cool, dry conditions over Australia during the Oil glaciation. Clay mineralogy and carbonate percentages reveal precession-scale oscillations during the Oil event. Kaolinite varies inversely with smectite and percent carbonate. Variations in precipitation and runoff, and wind velocities during southern hemisphere summer perihelion and high eccentricity intervals may account for the precession-scale oscillations. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0921-8181 UR - ISI:000185958600004 L2 - precession;eccentricity;orbital-forcing;Australian-Antarctic Seaway;Antarctic glaciation;Oligocene;clay mineralogy;Great Australian Bight;SEDIMENTOLOGICAL EVIDENCE; STABLE-ISOTOPE; ICE-SHEET; EOCENE; OCEAN; TIME; CALIBRATION; SEDIMENTS; EVOLUTION; EXPANSION SO - Global and Planetary Change 2003 ;39(3-4):257-269 8683 UI - 7748 AU - Malnev VN AU - Martysh EV AU - Kotsarenko AN AU - Grimalsky VV AU - Perez-Enriquez R AU - Koshevaya SV AD - Autonomous Univ Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoKiev Natl Univ, Kiev, UkraineUNAM, UNICIT, Queretaro, MexicoINAOE, Puebla 72000, MexicoKoshevaya, SV, Autonomous Univ Morelos, CIICAp, Av Univ, Cuernavaca 62210, Morelos, Mexico TI - On the problem of additional sources of microwave radiation in space plasma AB - We discuss possible additional mechanisms of microwave radiation in the dusty space plasma associated with the electron-ion recombination on the surface of grains that have to be taken into account in general balance of radiation. It is assumed that the Coulomb-type bound states of electrons exist on the surface of dusty particles. The recombination of plasma ions with electrons in these states forms neutral excited atoms (Rydberg atoms). Their quantum states depend on the dielectric permittivity of the grains and the quantum state of the electron on the surface. Spontaneous quantum transitions of the Rydberg atoms to the states with lower energies may be considered as an additional source of infrared radiation. The Rydberg atoms with energies closed to zero (near the ionization threshold) in a constant magnetic field may radiate cyclotron radiation. (C) 2003 Published by Elsevier Ltd MH - Mexico|Morelos MH - Mexico|Puebla MH - Mexico|Queretaro MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000184621000008 L2 - space plasma;microwave radiation;dusty object SO - Planetary and Space Science 2003 ;51(9-10):613-615 8684 UI - 7104 AU - Malpuech G AU - Rubo YG AU - Laussy FP AU - Bigenwald P AU - Kavokin AV AD - Univ Clermont Ferrand, Clermont Ferrand, FranceUNAM, Ctr Invest Energia, Mexico City, DF, MexicoMalpuech, G, Univ Clermont Ferrand, Clermont Ferrand, France TI - Polariton laser: thermodynamics and quantum kinetic theory AB - Cavity exciton-polaritons are considered to be two-dimensional weakly interacting true bosons. We analyse their thermodynamic properties and show that they can exhibit local condensation or Kosterlitz-Thouless phase transition towards superfluidity, so that polariton lasing can be achieved. The dynamical evolution of the condensate in a non-resonantly pumped cavity is described by a quantum kinetic formalism. The distribution function of polaritons is described by a semi-classical Boltzmann equation. A master equation for the ground-state density matrix is derived in the framework of the Born-Markov approximation. The dynamics of the ground-state population and its coherence are deduced MH - France MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 19 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000186246900015 L2 - BOSE-EINSTEIN CONDENSATION; SEMICONDUCTOR MICROCAVITIES; STIMULATED SCATTERING; EXCITON-POLARITONS; 2 DIMENSIONS; WELLS; PHOTOLUMINESCENCE; SUPERFLUIDITY; BOTTLENECK; RELAXATION SO - Semiconductor Science and Technology 2003 ;18(10):S395-S404 8685 UI - 7652 AU - Mananes A AU - Duque F AU - Mendez F AU - Lopez MJ AU - Alonso JA AD - Univ Cantabria, Dept Fis Moderna, E-39005 Santander, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas & Ingn, Mexico City 09340, DF, MexicoUniv Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainDIPC, San Sebastian 20018, SpainMananes, A, Univ Cantabria, Dept Fis Moderna, E-39005 Santander, Spain TI - Analysis of the bonding and reactivity of H and the Al-13 cluster using density functional concepts AB - The bonding of hydrogen in the Al13H aggregate is analyzed in the framework of density functional theory using the local density approximation. The interaction between the H-1s orbital and only certain molecular orbitals of Al-13 is responsible for the binding. Different measures of the charge transfer give consistent results and predict the stabilization of a sizable amount of electronic charge, about two electrons, around the proton site. The state of the H atom can be described as a negatively charged impurity screened by the surrounding electron gas, similarly to a H impurity embedded in a vacancy in metallic aluminum. Friedel-type oscillations can be appreciated in the screening charge. Local Fukui functions and condensed Fukui indexes associated to the ground state of the cluster Al-13 are used as indicators of molecular reactivity. Those indices allow to predict and understand the equilibrium location of H found in the total energy calculations for Al13H. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 20 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000184899200016 L2 - EXCHANGE-CORRELATION POTENTIALS; DESCRIBING CHEMICAL-REACTIONS; FUKUI FUNCTION INDEXES; SELF-ENERGY OPERATORS; SOFT ACIDS; VARIATIONAL-PRINCIPLES; ALUMINUM CLUSTERS; BASES PRINCIPLE; NON-NEGATIVITY; ADSORPTION SO - Journal of Chemical Physics 2003 ;119(10):5128-5141 8686 UI - 8388 AU - Mancera L AU - Rodriguez JA AU - Takeuchi N AD - Univ Nacl Colombia, Dept Fis, Bogota, ColombiaUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoMancera, L, Univ Nacl Colombia, Dept Fis, Bogota, Colombia TI - First principles calculations of the ground state properties and structural phase transformation in YN AB - We have studied the structural and electronic properties of YN in rock salt (sodium chloride), caesium chloride, zinc blende and wurtzite structures using first-principles total energy calculations. Rock salt is the calculated ground state structure with a = 4.93 Angstrom, B-0 = 157 GPa. The experimental lattice constant is a = 4.877 Angstrom. There is an additional local minimum in the wurtzite structure with total energy 0.28 eV/unit cell higher. At high pressure (similar to138 GPa), our calculations predict a phase transformation from a NaCl to a CsCl structure MH - Colombia MH - Mexico|Baja California PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000183071400020 L2 - HIGH-PRESSURE PHASE; ELECTRONIC-PROPERTIES; TITANIUM NITRIDE; SCANDIUM NITRIDE; GROWTH; SCN; ENERGY; MICROSTRUCTURE; DEPOSITION; SCN(001) SO - Journal of Physics-Condensed Matter 2003 ;15(17):2625-2633 8687 UI - 8397 AU - Manjarrez-Orduno N AU - Parkhouse RME AU - Santos-Argumedo L AD - IPN, CINVESTAV, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Mexico City 07360, DF, MexicoInst Gulbenkian Ciencias, Oeiras, PortugalSantos-Argumedo, L, IPN, CINVESTAV, Ctr Invest & Estudios Avanzados, Dept Mol Biomed, Ave IPN 2508,Col Zacatenco, Mexico City 07360, DF, Mexico TI - NIM-R7, a novel marker for resting B1 and marginal-zone B lymphocytes, is also expressed on activated T and B cells AB - In mice, follicular B cells have been studied in detail, while two other B-cell subpopulations - marginal-zone B and B1 cells - are less well understood. In this work we report the expression pattern of p58, a lymphocyte-activation marker, recognized by rat monoclonal antibody, NIM-R7, and present on the latter two cell subpopulations. Staining with NIM-R7 showed that undisturbed marginal-zone B cells, as well as peritoneal cavity and splenic B1a cells, constitutively expressed p58, whereas follicular B cells and resting T lymphocytes did not. Ontogenic analysis of different compartments showed that p58 did not appear at any stage of development, prior to the development of mature T or B2 lymphocytes. Upon polyclonal stimulation, however, p58 appeared on both T and B2 lymphocytes. Finally, ricin A-conjugated NIM-R7 was able to kill the BCL1 lymphoma without effect on mature resting B2 cells. Therefore, p58 may be a potential target for diagnosis or therapy of B1 and marginal-zone B-cell malignancies MH - Mexico|Distrito Federal MH - Portugal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Immunology U5 - J;Article AV - English IS - 0019-2805 UR - ISI:000183049500007 L2 - B-1 CELLS; IMMUNOTOXINS; ANTIGEN SO - Immunology 2003 ;109(2):232-237 8688 UI - 7141 AU - Mann GE AU - Green MP AU - Sinclair KD AU - Demmers KJ AU - Fray MD AU - Gutierrez CG AU - Garnsworthy PC AU - Webb R AD - Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, Leics, EnglandScottish Agr Coll, Aberdeen AB21 9YA, ScotlandAFRC, Inst Anim Hlth, Newbury RG16 0NN, Berks, EnglandNatl Autonomous Univ Mexico, Fac Med Vet, Mexico City 04510, DF, MexicoMann, GE, Univ Nottingham, Sch Biosci, Stutton Bonington Campus, Loughborough LE12 5RD, Leics, England TI - Effects of circulating progesterone and insulin on early embryo development in beef heifers AB - The aims of this study were to determine the effect on early embryo development of feeding a diet formulated to enhance circulating insulin concentrations and secondly to investigate the association between early embryo development and maternal progesterone concentrations in beef heifers. The study was carried out in 32 Simmental x Holstein Friesian heifers 22-25 months of age weighing 506 +/- 7 kg and in condition score 3.1 +/- 0.1. Animals were fed two diets that were isoenergetic and isonitrogenous, but that would encourage either propionate (diet A) or acetate (diet B) production in the rumen. The rationale was that propionate would induce a greater insulin release in response to feeding. Animals were fed a 50:50 mix of the two diets for 14 days at 0.8 x maintenance, with straw provided ad libitum. Animals were then fed one of the experimental diets for 3 weeks prior to synchronisation of oestrus and insemination and for a further 16 days following mating. All heifers were blood sampled daily from oestrus synchronisation and eight animals on each diet underwent daily transrectal real-time ultrasonography to determine the day of ovulation. All heifers were slaughtered at Day 16 after mating. While feeding of diet A (propionic) caused a significant (P < 0.05) increase in the plasma insulin to glucagons ratio differences in insulin were not significantly different. This is probably due to the fact that insulin concentrations were quite high as the heifers used in the present study were in good body condition making further increases in insulin difficult to achieve. Diet did not affect size of ovulatory follicle (diet A: 15.1 +/- 0.7 mm; diet B: 14.6 +/- 0.7 mm), day of ovulation (diet A: 3.5 +/- 0.2 days; diet B: 3.4 +/- 0.2 days), mean plasma progesterone concentration (diet A: 4.7 +/- 0.4 ng/ml; diet B: 5.2 +/- 0.3 ng/ml), corpus luteum weight (diet A: 6.0 +/- 0.2 g; diet B: 6.0 +/- 0.2 g) or pregnancy rate (diet A: 81.3%; diet B: 81.3%). However, the proportion of well-elongated ( >10 cm) embryos on Day 16 was higher in animals fed diet A than in those fed diet B (84.6% versus 38.5 %; P < 0.05). While progesterone concentration did not differ between pregnant and non-pregnant heifers, progesterone did show an earlier post-ovulatory rise in heifers with well-elongated (>10 cm) embryos with levels in these animals significantly higher on Days 4 and 5 than in heifers with small (<10 cm) embryos at slaughter. This study demonstrated an enhancement in early embryo development in animals fed a diet generating an increased insulin: glucagon ratio that was not related to circulating maternal progesterone concentrations. However, across diets, enhanced embryo development was associated with elevated plasma progesterone on Days 4 and 5 following mating. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology U5 - J;Article AV - English IS - 0378-4320 UR - ISI:000186208000006 L2 - cattle-embryo;progesterone;embryo;insulin;CATTLE; COWS SO - Animal Reproduction Science 2003 ;79(1-2):71-79 8689 UI - 7374 AU - Manno M AU - Albores A AD - Univ Naples Federico II, Dept Prevent Med Sci, I-80131 Naples, ItalyIPN, CINVESTAV, Dept Pharmacol & Toxicol, Toxicol Sect, Mexico City 07360, DF, MexicoManno, M, Univ Naples Federico II, Dept Prevent Med Sci, Via S Pansini 5, I-80131 Naples, Italy TI - Cytochrome P450 and biomonitoring: Mechanisms, models and ethical aspects - Preface MH - Italy MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Editorial Material AV - English IS - 0378-4274 UR - ISI:000185531100001 SO - Toxicology Letters 2003 ;144(1):1-1 8690 UI - 6729 AU - Manoutcharian K AU - Acero G AU - Munguia ME AU - Montero JA AU - Govezensky T AU - Cao C AU - Ugen K AU - Gevorkian G AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv S Florida, Coll Med, Dept Med Microbiol & Immunol, Tampa, FL 33612, USAGevorkian, G, Natl Autonomous Univ Mexico, Inst Invest Biomed, AP 70228, Mexico City 04510, DF, Mexico TI - Amyloid-beta peptide-specific single chain Fv antibodies isolated from an immune phage display library AB - A single-chain fragment variable (scFv) antibody library displayed on phage was constructed using spleen cells from mice immunized with human amyloid-beta peptide (Abeta42). This first anti-Abeta42 scFv immune antibody library was selected against human Abeta42. A number of positive clones were obtained, and sequences of V-H and V-K genes were analyzed using ExPASy and BLAST computer tools. This analysis revealed that only two unique clones with identical V-H and V-K complementarity determining region (CDR) (except HCDR2) and identical germline genes were selected, indicating that oligoclonal immune response was occurring in Abeta42-immunized mice. Abeta42-specific scFv antibodies selected from this first immune anti-Abeta42 phage antibody library may be an important tool for the development of therapeutic molecules for Alzheimer's disease (AD). (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Neurosciences U5 - J;Article AV - English IS - 0165-5728 UR - ISI:000187219800002 L2 - phage display;Alzheimer's disease;single-chain fragment variable (scFv) antibody library;AUTOIMMUNE THROMBOCYTOPENIC PURPURA; CENTRAL-NERVOUS-SYSTEM; ALZHEIMERS-DISEASE; IMMUNIZATION; MODEL; AGGREGATION; PROTEIN; BRAIN; IDENTIFICATION; IMMUNOTHERAPY SO - Journal of Neuroimmunology 2003 ;145(1-2):12-17 8691 UI - 9172 AU - manza-Pinzon MI AU - Khairallah M AU - Fox PN AU - Warburton ML AD - CIMMYT, Appl Biotechnol Ctr, Houston, TX 77205, USACIMMYT, Int Maize & Wheat Improvement Ctr, Appl Biotechnol Ctr, Montecillo, MexicoPostgrad Coll, Bot Program, Montecillo, MexicoWarburton, ML, CIMMYT, Appl Biotechnol Ctr, Apartado 370,POB 60326, Houston, TX 77205 USA TI - Comparison of molecular markers and coefficients of parentage for the analysis of genetic diversity among spring bread wheat accessions AB - The comparison of different methods of estimating genetic diversity could define their usefulness in plant breeding and genetic improvement programs. This study evaluates and compares the genetic diversity of 70 spring wheat accessions representing a broad genetic pool based on molecular markers and parentage relationships. The sample was composed of 32 accessions from the International Maize and Wheat Improvement Center (CIMMYT) and 38 from other breeding programs worldwide. Eight AFLP-primer combinations and 37 pairs of SSR primers were used to characterize the accessions and the Coefficients of Parentage (COP) were calculated from registered pedigrees. The average genealogical (COP) similarity (0.09 with a range of 0.0-1.0) was low in comparison to similarity calculated using SSR markers (0.41 with a range of 0.15-0.88) and AFLP markers (0.70 with a range of 0.33-0.98). Correlation between the genealogical similarity matrix (excluding accessions with COPs = 0) and the matrices of genetic similarity based on molecular markers was 0.34 less than or equal to r less than or equal to 0.46 (p < 0.05). It is concluded that AFLP and SSR markers are generally in agreement with estimates of diversity measured using COPs, especially when complete pedigree data are available. However, markers may provide a more correct estimate due to some unrealistic assumptions made when calculating COPs, such as absence of selection. Furthermore, both COP and marker distances indicate that CIMMYT accessions are different from the worldwide group of accessions MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 15 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000180947100009 L2 - coefficient of parentage;genetic diversity;molecular markers;wheat (Triticum aestivum L.);PREDICTING PROGENY VARIANCE; MICROSATELLITE MARKERS; SIZING TECHNOLOGY; CULTIVARS; RFLP; AFLPS; SSRS; HETEROSIS; BARLEY; RAPDS SO - Euphytica 2003 ;130(1):77-86 8692 UI - 9384 AU - Maradudin AA AU - Leskova TA AU - Mendez ER AD - Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USACtr Invest Cientifica & Educac Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoMaradudin, AA, Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA TI - Two-dimensional random surfaces that act as circular diffusers AB - We propose a method for designing a two-dimensional random Dirichlet surface that, when it is illuminated at normal incidence by a scalar plane wave, scatters the wave with a circularly symmetric distribution of intensity. The method is applied to the design of a surface that acts as a Lambertian diffuser. The method is tested by computer simulations, and a procedure for fabricating such surfaces on photoresist is described. (C) 2003 Optical Society of America MH - Mexico|Baja California MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000180433600002 SO - Optics Letters 2003 ;28(2):72-74 8693 UI - 6709 AU - Marasas CN AU - Smale M AU - Singh RP AD - Agr Res Ctr, Pretoria, South AfricaInt Food Policy Res Inst, Washington, DC 20036, USAIPGRI, Washington, DC, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, Mexico TI - The economic impact of productivity maintenance research: breeding for leaf rust resistance in modern wheat AB - This paper reports the results of a study undertaken to estimate the economic impact in developing countries of efforts by the International Maize and Wheat Improvement Center (CIMMYT) to breed leaf rust resistant spring bread wheat varieties since 1973. The challenge in estimating these benefits lies in the pathogen's ability to mutate to new races, which may infect previously resistant varieties. Genetic resistance, rather than fungicide application, is the principal means of controlling leaf rust in developing countries. Whereas productivity enhancement is often estimated in terms of yield gains and increased supply, productivity maintenance is measured in terms of the yield losses avoided by the research investment. The internal rate of return on CIMMYT's research investment was estimated at 41%. When discounted by 5%, the net present value was US$ 5.36 billion in 1990 dollars, and the benefit-cost ratio was 27:1. These findings emphasise the economic importance of maintenance research in crop breeding programs. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - South Africa MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000187214000003 L2 - economic impact;productivity maintenance research;leaf rust;rate of return analysis;developing countries;wheat;IMPROVEMENT RESEARCH; HYBRID CORN; RETURNS SO - Agricultural Economics 2003 ;29(3):253-263 8694 UI - 7247 AU - Marchenko SV AU - Moffat AFJ AU - Ballereau D AU - Chauville J AU - Zorec J AU - Hill GM AU - Annuk K AU - Corral LJ AU - Demers H AU - Eenens PRJ AU - Panov KP AU - Seggewiss W AU - Thomson JR AU - Villar-Sbaffi A AD - Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42101, USAUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaObserv Paris, GEPI, CNRS, UMR 8111, F-92195 Meudon, FranceInst Astrophys Paris, CNRS, F-75014 Paris, FranceWM Keck Observ, Kamuela, HI 96743, USATartu Astrophys Observ, EE-2444 Toravere, EstoniaInst Astrofis Canarias, Tenerife 38200, SpainUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaObserv Astron Mt Megantic, Notre Dame Des Bois, PQ, CanadaUniv Guanajuato, Dept Astron, Guanajuato, MexicoBulgarian Acad Sci, Inst Astron, Sofia, BulgariaUniv Bonn, Sternwarte, D-53121 Bonn, GermanyUniv Toronto, David Dunlap Observ, Richmond Hill, ON L4C 4Y6, CanadaMarchenko, SV, Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42101 USA TI - The unusual 2001 periastron passage in the "clockwork" colliding-wind binary WR 140 AB - We follow, using both optical spectroscopy and photometry, the "textbook'' colliding-wind WR+O binary WR 140 through and between the periastron passages of 1993 and 2001. An extensive collection of high-quality spectra allows us to derive precise orbital elements for both components simultaneously. We confirm the extremely high eccentricity of the system, e = 0.881 +/- 0.005, find an excellent match of the newly derived period to the previous estimates, P = 2899.0 +/- 1.3 days, and improve the accuracy of the time of periastron passage, T-0 = HJD 2, 446, 147.4 +/- 3.7. Around periastron, at orbital phases phi similar to 0.995-1.015, additional emission components appear on the tops of the broad Wolf-Rayet emission lines of relatively low ionization potential. The phase-dependent behavior of these excess line emissions points to their origin in the wind-wind collision zone, which allows us to place some limits on the orbital inclination of the system, i = 50degrees +/- 15degrees, and half-opening angle of the bow shock cone, theta = 40degrees +/- 15degrees. The relatively sudden appearance and disappearance of the extra emission components probably signify a rapid switch from an adiabatically to a radiatively dominated regime and back again. Multiyear UBV photometry provides one more surprise: in 2001 at phi = 0.02-0.06, the system went through a series of rapid, eclipse-like events. Assuming these events to be related to an episode of enhanced dust formation at periastron, we estimate the characteristic size of the dust grains to be a similar to0.07 mum MH - Bulgaria MH - Canada MH - Estonia MH - France MH - Germany MH - USA MH - Mexico|Guanajuato MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185916000041 L2 - binaries : spectroscopic;stars : early-type;stars : individual (WR 140);stars : Wolf-Rayet;WOLF-RAYET STARS; MULTIFREQUENCY VARIATIONS; X-RAY; SYSTEM HD-193793; WR 140; DUST; PHOTOMETRY; POLARIZATION; VARIABILITY; EMISSION SO - Astrophysical Journal 2003 ;596(2):1295-1304 8695 UI - 7845 AU - Mardoyan LG AU - Pogosyan GS AU - Sissakian AN AD - Yerevan State Univ, Int Ctr Adv Res, Yerevan 375049, ArmeniaJoint Inst Nucl Res, Dubna, Moscow Oblast, RussiaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoMardoyan, LG, Yerevan State Univ, Int Ctr Adv Res, Yerevan 375049, Armenia TI - Coulomb problem in a one-dimensional space with constant positive curvature AB - We construct a complex transformation S-1C --> S-1 generalizing the known Hurwitz transformation in the Euclidean space for one-dimensional quantum mechanics. As in the case of the flat space, this transformation allows establishing the connection between the Coulomb problem and the oscillator problem with the Calogero-Sutherland potential added. We fully describe the motion in a Coulomb field in S-1 and determine the energy spectrum and the wave Functions with the correct normalizing constant MH - Armenia MH - Mexico|Morelos MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0040-5779 UR - ISI:000184367300006 L2 - one-dimensional hydrogen atom;Schrodinger equation;Hurwitz transformation;constant-curvature space;DYNAMICAL SYMMETRIES; SPHERICAL GEOMETRY SO - Theoretical and Mathematical Physics 2003 ;135(3):808-813 8696 UI - 6901 AU - Mares EL AU - Sokolowski JH AD - Autonomous Univ Aguascalientes, Informat Syst Dept, Aguascalientes, Mexico. Univ Windsor, Ford Ind Chair Light Met Casting Technol, Windsor, ON N9B 3P4, Canada TI - Design, integration and evaluation of an artificial intelligence-based control system for the improvement of the monitoring and quality control process in the manufacturing of metal casting components AB - An Artificial Intelligence-Based Control System (AIBCS) combined with Thermal Analysis (TA) is applied in this research on the manufacturing of aluminum casting components. The AIBCS comprises three interrelated IT's based on statistical quality control techniques and Artificial Intelligence concepts. The IT's integrated in the AIBCS are a Real-Time Data Acquisition System (RTDAS), a Statistical Process Control System (SPCS) and a Knowledge-Based System (KBS). Laboratory experiments and assessment of the AIBCS's performance in terms of accuracy, reliability and timeliness showed superior monitoring and quality control of the casting process than traditional techniques MH - Canada MH - Mexico|Aguascalientes T3 - KNOWLEDGE-BASED INTELLIGNET INFORMATION AND ENGINEERING SYSTEMSLecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBX81U AV - English IS - 0302-9743 UR - ISI:000186518100012 SO - 2003 ;():80-86 8697 UI - 7983 AU - Marin-Becerra A AU - Stenson PA AU - McMaster J AU - Blake AJ AU - Wilson C AU - Schroder M AD - Univ Nottingham, Sch Chem, Nottingham NG7 2RD, EnglandUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04105, DF, MexicoSchroder, M, Univ Nottingham, Sch Chem, Univ Pk, Nottingham NG7 2RD, England TI - Assembly of dicobalt(III) complexes incorporating di-mu-thiophenolate moieties AB - The dinuclear [(CoCoIII)-Co-III] complexes [Co-2(L-1)(mu-OAc)(OAc)-(NH3)](PF6)(2) and [(CO2(L-2)(2)(mu-OAc)](PF6), incorporating the rare Co(mu-SR)(2)Co moiety associated with Schiff-base co-ligands, are protected by bridging mu-OAc- units situated within a domed cavity formed by the complexes; increasing the steric bulk of the ligand, as in [L-3](2-), affords the mononuclear species [Co(L-3)(OAc)]. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) MH - United Kingdom MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000184121100003 L2 - cobalt;Schiff-base ligand;thiolate;MACROCYCLIC COMPLEXES; BIMETALLIC REACTIVITY; BINUCLEATING LIGANDS; CO; DINUCLEAR; BINDING; SITE; NI; HOMODINUCLEAR; COORDINATION SO - European Journal of Inorganic Chemistry 2003 ;(13):2389-2392 8698 UI - 6757 AU - Marina CF AU - rredondo-Jimenez JI AU - Ibarra JE AU - Fernandez-Salas I AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoINSP, Ctr Invest Paludismo, Tapachula 30700, Chiapas, MexicoIPN, CINVESTAV, Guanajuato 36500, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Monterrey, MexicoUniv Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainWilliams, T, ECOSUR, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Effects of an optical brightener and an abrasive on iridescent virus infection and development of Aedes aegypti AB - The insecticidal properties of certain entomopathogenic viruses can be greatly improved in mixtures with substances that affect the integrity of the insect peritrophic membrane, particularly optical brighteners. We aimed to determine the effect of an optical brightener, Blankophor BBH, and an abrasive compound, silicon carbide, alone and in mixtures, on the prevalence of patent and covert infection of Aedes aegypti ( L.) ( Diptera: Culicidae) by Invertebrate iridescent virus 6 ( IIV-6) ( Iridoviridae). The prevalence of patent infection by IIV-6 was < 1.5% in all treatments involving virus. Contrary to predictions, there were significantly fewer patent infections in virus treatments involving Blankophor with or without silicon carbide compared with controls. Covert infection of adults detected by insect bioassay was between 6.7 and 12.2%, although no significant differences were observed between treatments. Exposure to IIV-6 alone or silicon carbide alone did not significantly increase larval mortality compared to the controls, whereas exposure to Blankophor alone, or in any combination with IIV-6 or silicon carbide, clearly increased larval mortality. These effects did not carry-over to the pupal stage. Adult females emerged &SIM; 1.5 days later than males. Compared to control insects, female development rate was extended by 11.4 and 12.6% in the treatments involving IIV-6 alone and silicon carbide alone, respectively. The sex ratio at adult emergence did not differ significantly between control insects and those of other treatments. These results support the hypothesis that the gut is unlikely to represent the principal point of infection of mosquito larvae by iridescent viruses MH - Mexico|Chiapas MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0013-8703 UR - ISI:000187160000008 L2 - Aedes aegypti;Invertebrate iridescent virus 6;optical brightener;peritrophic membrane;Blankophor BBH;silicon carbide;infection;mortality;development rate;Diptera;Culicidae;Iridoviridae;PERITROPHIC MATRIX; SACCHAROMYCES-CEREVISIAE; FLUORESCENT BRIGHTENER; CALCOFLUOR WHITE; MOSQUITO; PERMEABILITY; CHITIN; LARVAE; MEMBRANE; INSECTS SO - Entomologia Experimentalis et Applicata 2003 ;109(2):155-161 8699 UI - 8114 AU - Marina CF AU - Ibarra JE AU - rredondo-Jimenez JI AU - Fernandez-Salas I AU - Valle J AU - Williams T AD - Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainECOSUR, Tapachula, Chiapas, MexicoINSP, Ctr Invest Paludismo, Tapachula, Chiapas, MexicoIPN, CINVESTAV, Guanajuato, MexicoUniv Autonoma, Fac Ciencias Biol, Nuevo Leon, Monterrey, MexicoWilliams, T, Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, Spain TI - Sublethal iridovirus disease of the mosquito Aedes aegypti is due to viral replication not cytotoxicity AB - Invertebrate iridescent viruses (Iridoviridae) possess a highly cytotoxic protein. In mosquitoes (Diptera: Culicidae), invertebrate iridescent virus 6 (IIV-6) usually causes covert (inapparent) infection that reduces fitness. To determine whether sublethal effects of IIV-6 are principally due to cytotoxicity of the viral inoculum (which inhibits macromolecular synthesis in the host), or caused by replication of the virus larvae of the mosquito Aedes aegypti (L) were exposed to untreated IIV-6 virus that had previously been deactivated by heat or ultraviolet light. Control larvae were not exposed to virus. Larval development time was shortest in control larvae and extended in larvae exposed to untreated virus. Covertly infected mosquitoes laid significantly fewer eggs, produced between 20 and 35% fewer progeny and had reduced longevity compared to other treatments. Wing length was shortest in mosquitoes exposed to heat-deactivated virus. Multivariate analysis of the same data identified fecundity and progeny production as the most influential variables in defining differences among treatments. Overall, viral infection resulted in a 34% decrease in the net reproductive rate (R-0) of covertly infected mosquitoes, vs. only 5-17% decrease of R-0 following treatments with deactivated virus, compared to controls. Sublethal effects of IIV-6 in Ae. aegypti appear to be mainly due to virus replication, rather than cytotoxic effects of the viral inoculum MH - Mexico|Chiapas MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0269-283X UR - ISI:000183641800009 L2 - Aedes aegypti;Iridovirus;biological control;bionomics;covert infection;cytotoxic protein;deactivated virus;IIV-6;insect pathology;invertebrate iridescent virus;larval development time;mosquito fecundity;mosquito fitness;mosquito longevity;mosquito size;reproductive rate (R-0);sublethal effects;wing length;INDIAN-MEAL MOTH; CHILO IRIDESCENT VIRUS; COMPLETE DNA-SEQUENCE; FROG VIRUS-3; PLODIA-INTERPUNCTELLA; BODY-SIZE; POPULATION-DYNAMICS; POLYHEDROSIS-VIRUS; INFECTION; BACULOVIRUS SO - Medical and Veterinary Entomology 2003 ;17(2):187-194 8700 UI - 8540 AU - Marina CF AU - Ibarra JE AU - rredondo-Jimenez JI AU - Fernandez-Salas I AU - Liedo P AU - Williams T AD - Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainECOSUR, Tapachula 30700, Chiapas, MexicoINSP, Ctr Invest Paludismo, Tapachula 30700, Chiapas, MexicoIPN, CINVESTAV, Guanajuato 36500, MexicoUniv Auton Nuevo Leon, Fac Ciencias Biol, Monterrey, MexicoWilliams, T, Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, Spain TI - Adverse effects of covert iridovirus infection on life history and demographic parameters of Aedes aegypti AB - Sublethal viral infections can cause changes in the body size and demography of insect vectors, with important consequences for population dynamics and the probability that individual mosquitoes will transmit disease. This study examined the effects of covert ( sublethal) infection by Invertebrate iridescent virus 6 (IIV-6) on the demography of female Aedes aegypti and the relationship between key life history parameters in covertly infected female insects compared with healthy ( control) insects or non-infected mosquitoes that had survived exposure to virus inoculum without becoming infected. Of the female mosquitoes that emerged following exposure to virus inoculum and were offered blood meals, 29% (43/150) proved positive for covert IIV-6 infection. The net reproductive rate ( R 0) of covertly infected females was 50% lower for infected females compared to control mosquitoes, whereas non-infected exposed females had an R 0 approximately 15% lower than that of controls. Reproduction caused a significant decrease of about 13 days in mosquito longevity compared to females that did not reproduce (P < 0.001). Infected females lived 5-8 days less than non-infected exposed females or controls, respectively (P = 0.028). Infected females and non-infected exposed females both had significantly shorter wings than control insects ( P < 0.001). There was a significant positive correlation between wing length and longevity in covertly infected female mosquitoes but not in control or non-infected exposed mosquitoes. Longer lived females produced more eggs in all treatments. There were no significant correlations between body size and fecundity or the production of offspring. There was also no correlation between fecundity and fertility, suggesting that sperm inactivation was a more likely cause of decreased fertility in older mosquitoes than sperm depletion. We conclude that covert infection by iridescent virus is likely to reduce the vectorial capacity of this mosquito MH - Mexico|Chiapas MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Entomology U5 - J;Article AV - English IS - 0013-8703 UR - ISI:000182708000006 L2 - Iridoviridae;Diptera;Culicidae;inapparent infection;sublethal effects;fecundity;fertility;longevity;body size;INDIAN-MEAL MOTH; PLODIA-INTERPUNCTELLA; POPULATION-DYNAMICS; IMMUNE-RESPONSE; BODY-SIZE; FECUNDITY; MOSQUITO; REPRODUCTION; OVIPOSITION; LEPIDOPTERA SO - Entomologia Experimentalis et Applicata 2003 ;106(1):53-61 8701 UI - 6808 AU - Maris P AU - Raya A AU - Roberts CD AU - Schmidt SM AD - N Carolina State Univ, Dept Phys, Raleigh, NC 27695, USAUniv Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Morelia, Michoacan, MexicoArgonne Natl Lab, Div Phys, Argonne, IL 60439, USAUniv Rostock, Fachbereich Phys, D-18051 Rostock, GermanyHelmholtz Gemeinschaft, D-53175 Bonn, GermanyMaris, P, N Carolina State Univ, Dept Phys, Raleigh, NC 27695, USA TI - Facets of confinement and dynamical chiral symmetry breaking AB - The gap equation is a cornerstone in understanding dynamical chiral symmetry breaking and may also provide clues to confinement. A symmetry-preserving truncation of its kernel enables proofs of important results and the development of an efficacious phenomenology. We describe a model of the kernel that yields: a momentum-dependent dressed-quark propagator in fair agreement with quenched lattice-QCD results; and chiral limit values, f(pi)(0) = 68 MeV and ((q) over barq) = -(190 MeV)(3). It is compared with models inferred from studies of the gauge sector MH - Germany MH - Mexico|Michoacan MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000186890000024 L2 - DYSON-SCHWINGER EQUATIONS; INFRARED BEHAVIOR; QCD; PHYSICS; VERTEX; MASS SO - European Physical Journal A 2003 ;18(2-3):231-235 8702 UI - 8452 AU - Markaida U AU - Sosa-Nishizaki O AD - CICESE, Lab Ecol Pesquera, Dept Ecol, Ensenada, Baja California, MexicoSosa-Nishizaki, O, CICESE, Dpto Ecol, POB 434844, San Diego, CA 92143 USA TI - Food and feeding habits of jumbo squid Dosidicus gigas (Cephalopoda : Ommastrephidae) from the Gulf of California, Mexico AB - Stomach contents of 533 jumbo squid, Dosidicus gigas, ranging between 14.5 and 87.5 cm dorsal mantle length were collected on a monthly basis in the central Gulf of California from November 1995 to April 1997. Fish prey were identified by sagittal otoliths, cephalopods by beaks and crustaceans by exoskeletal features. The diet was dominated by Benthosema panamense, an abundant near-shore nyctoepipelagic myctophid that forms dense aggregations. Another myctophid, Triphoturus mexicanus, several micronektonic squid, pelagic red crab and small pelagic fish such as northern anchovy and Pacific sardine played a secondary role. The largest differences in diet were due to spatial and monthly changes, while differences regarding squid size or sex were smaller. Prey size (averaging 5-7 cm) and prey number did not vary with size of jumbo squid. jumbo squid in the slopes of the Guaymas basin feed on abundant schooling mesopelagic micronekton of annual nature with a quick response to environmental changes, which could partly explain the large annual fluctuations of this commercial resource MH - Mexico|Baja California MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000182915100015 L2 - OTOLITHS; BIOLOGY; WATERS SO - Journal of the Marine Biological Association of the United Kingdom 2003 ;83(3):507-522 8703 UI - 6350 AU - Marnell LL AU - Garcia-Vargas GG AU - Chowdhury UK AU - Zakharyan RA AU - Walsh B AU - Avram MD AU - Kopplin MJ AU - Cebrian ME AU - Silbergeld EK AU - Aposhian HV AD - Univ Arizona, Dept Mol & Cellular Biol, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAUniv Arizona, Ctr Toxicol, Tucson, AZ 85721, USAUniv Juarez Estado Durango Lasalle, Fac Med, Durango, MexicoJohns Hopkins Univ, Dept Environm Hlth Sci, Baltimore, MD 21205, USAAposhian, HV, Univ Arizona, Dept Mol & Cellular Biol, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA TI - Polymorphisms in the human monomethylarsonic acid (MMA(V)) reductase/hGSTO1 gene and changes in urinary arsenic profiles AB - Large interindividual variability in urinary arsenic profiles, following chronic inorganic arsenic exposure, is well-known in humans. To understand this variability, we studied the relationship between polymorphisms in the gene for human monomethylarsonic acid (MMA(V)) reductase/hGSTO1 and the urinary arsenic profiles of individuals chronically exposed to arsenic in their drinking water. To ensure that we did not overlook rare polymorphisms, not included in the public databases, we amplified and sequenced all six exons of the gene and their flanking regions, using DNA isolated from peripheral blood samples of 75 subjects, living in the vicinity of Torreon, Mexico. Four groups, based on the levels of arsenic (9-100 mug/L) in their drinking water, were studied. We identified six novel polymorphisms and two reported previously. The novel polymorphisms were a three base pair deletion (delGGC) in the first intron; a G > C transversion, leading to a serine-to-eysteine substitution at amino acid 86; a G > T transversion and a A > T transversion in intron 5; a G > A transition resulting in glutamate-to-lysine substitution in amino acid 208; and a C > T transition producing an alanine-to-valine substitution in amino acid 236. Two subjects displayed significant differences in patterns of urinary arsenic; they had increased levels of urinary inorganic arsenic and reduced levels of methylated urinary arsenic species as compared to the rest of the study population. These two subjects had the same unique polymorphisms in hGSTO1 in that they were heterozygous for E155del and Glu208Lys. The identified SNPs may be one of the reasons for the large interindividual variability in the response of humans to chronic inorganic arsenic exposure. The findings suggest the need for further studies to identify unambiguously specific polymorphisms that may account for interindividual variability in the human response to chronic inorganic arsenic exposure MH - USA MH - Mexico|Durango PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 30 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Toxicology U5 - J;Article AV - English IS - 0893-228X UR - ISI:000187365700003 L2 - PURINE NUCLEOSIDE PHOSPHORYLASE; MAMMALIAN SYSTEMS; ENZYMATIC REDUCTION; BIOTRANSFORMATION; IDENTIFICATION; TRANSFERASES; AREAS SO - Chemical Research in Toxicology 2003 ;16(12):1507-1513 8704 UI - 7341 AU - Marquez-Azua B AU - DeMets C AD - Univ Guadalajara, Dept Geog & Ordenac Terr, Guadalajara 44430, Jalisco, MexicoUniv Wisconsin, Dept Geol & Geophys, Madison, WI 53706, USAMarquez-Azua, B, Univ Guadalajara, Dept Geog & Ordenac Terr, Av Maestros & Mariano Barcena,Planta Alta, Guadalajara 44430, Jalisco, Mexico TI - Crustal velocity field of Mexico from continuous GPS measurements, 1993 to June 2001: Implications for the neotectonics of Mexico AB - [1] We combine velocities for 14 continuous GPS stations spanning Mexico and 173 additional continuous GPS sites on the North American and Pacific plates to study the large-scale deformation of Mexico. The new station velocities, which are derived from more than 6000 days of previously unused GPS data, provide the first ever view of the crustal velocity field of Mexico. Key results are as follows: (1) Areas north of the Mexican Volcanic Belt, not including Baja California, move with the North American plate interior within the 1-2 mm yr(-1) station velocity uncertainties. Station velocities for the Mexican Basin and Range are consistent with no present-day extension and yield an upper 95% limit of 1-3 mm yr(-1) for any regional extension. (2) South of the Mexican Volcanic Belt, five of the six sites move significantly relative to the North American plate. All sites in the Yucatan Peninsula move toward the east at 3-4 mm yr(-1), possibly defining an independent Yucatan block. (3) Site velocities are consistent with limits of 0-4 mm yr(-1) for present slip across the Mexican Volcanic Belt. (4) Tampico, on the gulf coast, exhibits eastward motion consistent with gravity sliding known to occur in the adjacent Mexican Ridges fold belt. (5) Southeastward motion of La Paz relative to the Pacific plate is consistent with the hypothesis that the Baja Peninsula is not fully attached to the Pacific plate. (6) Residual velocities for 160 North American plate GPS stations outside of Mexico exhibit no coherent regional patterns indicative of internal plate deformation MH - Mexico|Jalisco MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000185652400004 L2 - Mexico;neotectonics;Basin-and-Range;Mexican Volcanic Belt;CALIFORNIA SHEAR ZONE; NORTH AMERICA MOTION; PLATE MOTION; SUBDUCTION ZONE; VOLCANIC BELT; GEODETIC CONSTRAINTS; NORTHEASTERN SONORA; SOUTHERN CALIFORNIA; KINEMATIC MODELS; BAJA-CALIFORNIA SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B9): 8705 UI - 8380 AU - Marquez-Borbon I AU - Shlyagin MG AU - Esteban O AU - Miridonov SV AU - Spirin VV AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoUniv Alcala de Henares, Dept Elect, Alcala De Henares 28871, SpainMarquez-Borbon, I, CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, Mexico TI - Remote sensing with ultra-low-reflective Bragg gratings written in standard telecommunication fiber AB - A remote strain sensor with a lead fiber length of 3.3 km and an ultraweak fiber Bragg grating with reflectivity of 0.015% was demonstrated. A demodulation technique based on methods of the differential spectroscopy allows interrogating FBG with reflectance much below the Rayleigh backscattering coefficient. (C) 2003 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Spain PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Editorial Material AV - English IS - 0091-3286 UR - ISI:000182985900003 L2 - Bragg gratings;Rayleigh backscattering;fiber optic sensors;ACOUSTOOPTIC TUNABLE FILTER; SENSORS; LASER; DEMODULATION; ARRAYS; SYSTEM SO - Optical Engineering 2003 ;42(5):1182-1183 8706 UI - 8447 AU - Marquez FG AU - Cisneros B AU - Garcia F AU - Ceja V AU - Velazquez F AU - Depardon F AU - Cervantes L AU - Rendon A AU - Mornet D AU - Rosas-Vargas H AU - Mustre M AU - Montanez C AD - IPN, Ctr Invest & Estudios Avanzados, Dept Genet & Biol Mol, Mexico City 07000, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Unidad Microscopia Confocal, Mexico City 07000, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City 07000, DF, MexicoCHRU, INSERM EMI 99 18, Lab Physiopathol Mol & Cellulaire, F-67091 Strasbourg, FranceGrp Muscles & Pathol, INSERM U 128, F-34196 Montpellier 5, FranceMontanez, C, IPN, Ctr Invest & Estudios Avanzados, Dept Genet & Biol Mol, Avenida Inst Politecn Nacl 2508,Apartado Postal 1, Mexico City 07000, DF, Mexico TI - Differential expression and subcellular distribution of dystrophin Dp71 isoforms during differentiation process AB - Dp71 is the major product of the Duchenne muscular dystrophy gene in the brain. In order to study the function of Dp71 in the nervous system we examined the expression of Dp71 isoforms in PC12 rat pheochromocytoma cell line, a well-established system to study neuronal differentiation. We show by reverse transcriptase-polymerase chain reaction and Western blot assays that PC12 cells express two Dp71 isoforms. One isoform lacks exon 71 and the other isoform lacks exons 71 and 78 (Dp71d and Dp71f isoforms respectively). Nerve growth factor-induced neuronal differentiation of PC12 cells results in differential regulation of the expression and subcellular localization of Dp71 isoforms: a) the amount of Dp71f protein increases nine-fold in total extracts while Dp71d increases up to seven-fold in nuclear extracts; b) Dp71f relocates from the cytoplasm to neuritic processes, being prominent at varicosities and the growth cone; c) Dp71d relocates almost entirely to the nucleus and is detected to a lower extent in the cytoplasm and neuritic processes. Dp71f co-localizes with beta-dystroglycan and synaptophysin while Dp71d co-localizes with beta-dystroglycan in the nucleus. Dp71d accumulates at cell-cell contacts where Dp71f is absent. These results suggest that Dp71d and Dp71f associate with different subcellular complexes and therefore may have distinct functions in PC12 cells. (C) 2003 IBRO. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000182926900008 L2 - alternative splicing;cell-cell contacts;PC12 cells;beta-dystroglycan;synaptophysin;nerve growth factor;MUSCULAR-DYSTROPHY; BINDING-SITE; RAT-BRAIN; GENE; LOCALIZATION; CELLS; PROTEIN; TRANSCRIPT; IDENTIFICATION; PROMOTER SO - Neuroscience 2003 ;118(4):957-966 8707 UI - 8331 AU - Marquez MF AU - Medrano G AU - Frank R AU - Fontaine G AU - Hermosillo AG AU - Cardenas M AD - Inst Nacl Cardiol Ignacio Chavez, Subdirecc Invest Clin, Dept Electrocardiog & Cardiac Electrophysiol, Mexico City 14080, DF, MexicoHop La Pitie Salpetriere, Unite Rythmol, Inst Coeur, Paris, FranceCardenas, M, Inst Nacl Cardiol Ignacio Chavez, Subdirecc Invest Clin, Dept Electrocardiog & Cardiac Electrophysiol, Juan Badiano 1,Secc 16, Mexico City 14080, DF, Mexico TI - Cycle length-dependent repolarization changes during atrial fibrillation in the Brugada syndrome AB - This is a case report of a patient with Brugada syndrome who developed paroxysmal atrial fibrillation. During the episode, beat-to-beat changes in ventricular repolarization were observed. These changes were a paradoxical ST-segment alteration after a short-coupled ventricular beat. These findings, not reported before, may be helpful for the diagnosis of this syndrome MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0022-0736 UR - ISI:000183094300010 L2 - atrial fibrillation;Brugada syndrome;ST-SEGMENT ELEVATION; BUNDLE-BRANCH BLOCK; SUDDEN-DEATH; LEADS V-1; MECHANISM SO - Journal of Electrocardiology 2003 ;36(2):161-164 8708 UI - 9282 AU - Marquez MF AU - Sobrino AN AU - Romero-Ayala L AU - Charfeddine H AU - Hidden-Lucet F AU - Tonet J AU - Frank R AD - Inst Nacl Cardiol Ignacio Chavez, Dept Electrocardiog & Electrofisiol, Mexico City, DF, MexicoHop La Pitie Salpetriere, Inst Coeur, Unite Rythmol, Paris, FranceMarquez, MF, Inst Nacl Cardiol Ignacio Chavez, Serv Electrocardiog & Electrofisiol Clin, Juan Badiano 1,Col Secc 16, Tlalpan 14080, Mexico TI - Clinical relevance of isoproterenol challenge in tilt table testing in a patient with nonspecific repolarization abnormalities and exercise-induced syncope MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0954-6820 UR - ISI:000180606400020 L2 - RIGHT-VENTRICULAR CARDIOMYOPATHIES SO - Journal of Internal Medicine 2003 ;253(2):244-246 8709 UI - 7122 AU - Marre M AU - Garcia-Puig J AU - Kokot F AU - Fernandez M AU - Jermendy G AU - Opie L AU - Moyseev V AU - Scheen A AU - Ionescu-Tirgoviste C AU - Saldanha H AD - Hop Bichat, F-75877 Paris, FranceHosp La Paz, Madrid, SpainSlaska Akad Medyczna, Katowice, PolandInst Nacl Nutr, Mexico City, DF, MexicoBajcsy Zsilinsky Korhas 3, Budapest, HungaryHeart Res & Hypertens Unit, Cape Town, South AfricaHosp Nr 64, Moscow, RussiaCHU Sart Tilman, Liege, BelgiumInst Nutr Metab Dis, Bucharest, RomaniaHUC, Serv Med 1, Coimbra, Portugal TI - The extent of microalbuminuria reduction with indapamide SR in elderly hypertensive type 2 diabetic patients: The nestor study MH - Belgium MH - France MH - Hungary MH - Mexico|Distrito Federal MH - Poland MH - Portugal MH - Romania MH - Russia MH - South Africa MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0263-6352 UR - ISI:000184406700641 SO - Journal of Hypertension 2003 ;21():S183-S184 8710 UI - 8522 AU - Marre M AU - Puig JG AU - Kokot F AU - Fernandez M AU - Jermendy G AU - Opie L AU - Moyseev V AU - Scheen A AU - Ionescu-Tirgoviste C AU - Saldanhan MH AU - Halabe A AU - Williams B AU - Mion D AU - Ruiz M AU - Hermansen K AU - Tuomilehto J AU - Finizola B AU - Pozza G AU - Chastang C AU - Ollivier JP AU - Amouyel R AU - Asmar R AD - Hop Bichat, F-75877 Paris, FranceHop St Louis, Paris, FranceHop Val De Grace, Paris, FranceInst Cardiovasc, Paris, FranceINSERM, IPL, U 508, F-59045 Lille, FranceHosp La Paz, Madrid, SpainSlaska Akad Medyczna, Katowice, PolandInst Nacl Nut Salvador Zubrian, Mexico City, DF, MexicoBajcsy Zsilinszky Korhaz III, Budapest, HungaryGroote Schuur Hosp, Sch Med, ZA-7925 Cape Town, South AfricaHosp 64, Moscow, RussiaCHU Sart Tilman, B-4000 Liege, BelgiumInst Nutr & Metab Dis N Paulescu, Bucharest, RomaniaHUC, Coimbra, PortugalEdith Wolfson Med Ctr, Holon, IsraelUniv Leicester, Leicester LE1 7RH, Leics, EnglandHosp Clin Sao Paulo, Sao Paulo, BrazilHosp Clin Buenos Aires, Buenos Aires, DF, ArgentinaAarhus Univ Hosp, DK-8000 Aarhus, DenmarkNatl Publ Hlth Inst, Helsinki, FinlandASCARDIO, Barquisimeto, VenezuelaUniv Milan, Osped San Raffaele, I-20127 Milan, ItalyMarre, M, Hop Bichat, F-75877 Paris, France TI - Effect of indapamide SR on microalbuminuria - the NESTOR study (Natrilix SR versus Enalapril Study in Type 2 diabetic hypertensives with micrOalbuminuRia) - rationale and protocol for the main trial AB - In type 2 diabetic hypertensive patients, microalbuminuria can be due to hypertension and/or diabetic nephropathy. Angiotensin-converting enzyme (ACE) inhibitors act preferentially on microalbuminuria due to diabetic nephropathy. The objective is to demonstrate the efficacy of a thiazide-like diuretic, indapamide sustained release (SR), at reducing microalbuminuria in hypertensive type 2 diabetic patients in comparison with an ACE inhibitor, enalapril. The study is an international multicentre, 12-month, randomized, double-blind, controlled, two parallel group study of type 2 diabetic patients with hypertension (140 mmHg less than or equal to systolic blood pressure <180 mmHg and diastolic blood pressure <110 mmHg) and microalbuminuria. Intervention is after a 4-week placebo period, patients with microalbuminuria greater than or equal to 20 and less than or equal to 200 mug/min are randomized to indapamide SR 1.5 mg or to enalapril 10 mg once a day for a one-year treatment period. An additional label treatment by amlodipine 5-10 mg (1 st step) and atenolol 50-100 mg (2nd step) a day is permitted after 6 weeks of treatment based upon blood pressure response. The main outcome measures are microalbuminuria expressed as urinary albumin to creatinine ratio, albumin fractional clearance, and albumin excretion rate evaluated on overnight urine collections. Secondary criteria are supine and standing systolic, diastolic and mean blood pressure; and biological and clinical safety. This study will complete the knowledge of the efficacy of indapamide SR in hypertension and target organ damage and will provide valuable information on the management of type 2 diabetic hypertensives with microalbuminuria. (C) 2003 Lippincott Williams Wilkins MH - Argentina MH - Belgium MH - Brazil MH - Denmark MH - United Kingdom MH - Finland MH - France MH - Hungary MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Portugal MH - Romania MH - Russia MH - South Africa MH - Spain MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000182829300005 L2 - type 2 diabetes;hypertension;microalbuminuria;indapamide;enalapril;randomized trial;RANDOMIZED DOUBLE-BLIND; SUSTAINED-RELEASE; BLOOD-PRESSURE; 1.5 MG; SYSTOLIC HYPERTENSION; EFFICACY; REGRESSION; DISEASE; RISK SO - Journal of Hypertension 2003 ;21():S19-S24 8711 UI - 7861 AU - Marron JS AU - Nakamura M AU - Perez-Abreu V AD - Ctr Invest Matemat AC, Dept Probabil & Stat, Guanajuato 36000, MexicoUniv N Carolina, Dept Stat, Chapel Hill, NC 27599, USANakamura, M, Ctr Invest Matemat AC, Dept Probabil & Stat, Apdo Postal 402, Guanajuato 36000, Mexico TI - Semi-parametric multivariate modelling when the marginals are the same AB - A model is developed for multivariate distributions which have nearly the same marginals, up to shift and scale. This model, based on "interpolation" of characteristic functions, gives a new notion of "correlation". It allows straightforward nonparametric estimation of the common marginal distribution, which avoids the "curse of dimensionality" present when nonparametically estimating the full multivariate distribution. The method is illustrated with environmental monitoring network data, where multivariate modelling with common marginals is often appropriate. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Guanajuato MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0047-259X UR - ISI:000184377500007 L2 - multivariate characteristic function;measures of correlation;infinitely divisible random vectors;environmental data;MONITORING NETWORK; DISTRIBUTIONS; INFERENCE SO - Journal of Multivariate Analysis 2003 ;86(2):310-329 8712 UI - 9155 AU - Martens M AU - Rosales C AU - Morilla A AD - Intervet Int, NL-5830 AA Boxmeer, NetherlandsUNAM, FMVZ, Mexico City, DF, MexicoINIFAP, CENID Microbiol, SAGAR, Mexico City, DF, MexicoMartens, M, Intervet Int, POB 31, NL-5830 AA Boxmeer, Netherlands TI - Evaluation of the use of a subunit classical swine fever marker vaccine under field conditions in Mexico AB - Vaccination with an E2 subunit classical swine fever (CSF) marker vaccine (Porcilis pesti; Intervet International, Boxmeer, Netherlands) appeared to limit the number of new outbreaks in an endemic area. An ELISA that identifies antibodies to the CSF Erns protein differentiated vaccinated and infected pigs in vaccinated herds MH - Mexico|Distrito Federal MH - Netherlands PB - PERRY: AMER ASSOC SWINE PRACTITIONERS RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 1537-209X UR - ISI:000180999600008 L2 - swine;classical swine fever;marker vaccine;eradication SO - Journal of Swine Health and Production 2003 ;11(2):81-85 8713 UI - 7119 AU - Marti-Climent JM AU - Mendez R AU - Penuelas I AU - Iniguez MP AU - Serra P AU - Barquero R AU - Vega HR AD - Univ Navarra Clin, Pamplona, SpainUniv Valladolid, E-47002 Valladolid, SpainHosp Univ Rio Hortega, Valladolid, SpainUniv Autonoma Zacatecas, Cent Reg Estudios Nucl, Zacatecas, Mexico TI - Neutron dosimetry around a cyclotron during positron emission radionuclide production MH - Mexico|Zacatecas MH - Spain PB - RESTON: SOC NUCLEAR MEDICINE INC RP - NOT IN FILE U3 - TC 0 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Meeting Abstract AV - English IS - 0161-5505 UR - ISI:000182729601089 SO - Journal of Nuclear Medicine 2003 ;44(5):327P-328P 8714 UI - 7116 AU - Marti-Lopez L AU - Bouza-Dominguez J AU - Hebden JC AU - Arridge SR AU - Martinez-Celorio RA AD - Ctr Neurociencias Cuba, Havana 10600, CubaUniv Coll London, Dept Med Phys & Bioengn, London WC1E 6JA, EnglandUniv London Univ Coll, Dept Comp Sci, London WC1E 6BT, EnglandCtr Invest Opt, Guanajuato 150, MexicoMarti-Lopez, L, Ctr Neurociencias Cuba, Apartado Postal 6412, Havana 10600, Cuba TI - Validity conditions for the radiative transfer equation AB - We compare the radiative transfer equation for media with constant refractive index with the radiative transfer equation for media with spatially varying refractive indices [J. Opt. A Pure App. Opt. 1, L1 (1999)] and obtain approximate conditions under which the former equation is accurate for modeling light propagation in scattering media with spatially varying refractive indices. These conditions impose restrictions on the variations of the refractive index, the gradient of the refractive index, the divergence of the rays, the frequency of modulation, and the widths of light pulses, which are related to the mean refractive index, the absorption coefficient, and the reduced scattering coefficient of the medium. Each condition is geometrically interpreted. Some implications of the results are discussed. (C) 2003 Optical Society of America MH - Cuba MH - United Kingdom MH - Mexico|Guanajuato PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000186217800007 L2 - OPTICAL TOMOGRAPHY; REFRACTIVE-INDEX; DIFFUSION-APPROXIMATION; PHOTON MIGRATION; SCATTERING MEDIA; HUMAN BRAIN; TISSUE; TIME; SPECTROSCOPY; PATHLENGTH SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2003 ;20(11):2046-2056 8715 UI - 7487 AU - Martin LC AU - Schubert C AU - Sandoval VMV AD - Univ Michoacana, Inst Fis & Math, Morelia 58040, Michoacan, MexicoCalifornia Inst Phys & Astrophys, Palo Alto, CA 94306, USAMartin, LC, Univ Michoacana, Inst Fis & Math, Edifico C-3,Apdo Postal 2-82,CP, Morelia 58040, Michoacan, Mexico TI - On the low-energy limit of the QED N-photon amplitudes AB - We derive an explicit formula for the low energy limits of the one-loop on-shell massive N-photon amplitudes, for arbitrary N and all helicity assignments, in scalar and spinor QED. The two-loop corrections to the same amplitudes are obtained for up to the ten point case. All photon amplitudes with an odd number of '+' helicities are shown to vanish in this limit to all loop orders. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000185294300014 L2 - ABELIAN GAUGE-THEORIES; YANG-MILLS THEORY; SELF-DUAL SECTOR; DIMENSIONAL REGULARIZATION; HELICITY AMPLITUDES; FEYNMAN DIAGRAMS; QCD AMPLITUDES; INTEGRALS; REDUCTION; BREMSSTRAHLUNG SO - Nuclear Physics B 2003 ;668(1-2):335-344 8716 UI - 7851 AU - Martinez-Aguilar G AU - Hammerman WA AU - Mason EO AU - Kaplan SL AD - Baylor Int Pediat Aids Initiat, Houston, TX, USABaylor Coll Med, Dept Pediat, Houston, TX 77030, USATexas Childrens Hosp, Infect Dis Lab, Houston, TX 77030, USAMexican Social Secur Inst, Unidad Invest Med Epidemiol Clin, Mexico City, DF, MexicoMartinez-Aguilar, G, Baylor Int Pediat Aids Initiat, Houston, TX, USA TI - Clindamycin treatment of invasive infections caused by community-acquired, methicillin-resistant and methicillin-susceptible Staphylococcus aureus in children AB - Background. Community-acquired, methicillin-resistant Staphylococcus aureus (CA-MRSA) is an established pathogen in several areas of the United States, but experience with clindamycin for the treatment of invasive MRSA infections is limited. We compared the outcome of therapy for MRSA with that of methicillin-susceptible (MSSA) invasive infections in children treated with clindamycin, vancomycin or beta-lactam antibiotics. Methods. The demographics, hospital course and outcome of children at Texas Children's Hospital between February and November 2000 and between August 2001 and August 2002 with invasive S. aureus infections were reviewed from medical records in this retrospective study. Results. CA-MRSA and community-acquired methicillin-susceptible S. aureus (MSSA) caused invasive infections in 46 and 53 children, respectively. The median ages (range) of the children were: MRSA, 3.5 years (2 months to 18.6 years); MSSA, 4.8 years (3 months to 19.8 years). The sites of infection for MRSA vs. MSSA isolates, respectively, were: bacteremia, 3 vs. 6; osteomyelitis, 14 vs. 14; septic arthritis, 5 vs. 7; pneumonia, 11 vs. 3; lymphadenitis, 7 vs. 14; other, 5 vs. 8. Among MSSA patients 39 (20 received clindamycin only, 18 had vancomycin initially and 8 were treated with a beta-lactam initially) received clindamycin and 6 received vancomycin as primary therapy. Among MSSA patients, clindamycin, nafcillin or other beta-lactam antibiotics were used in 24, 18 and 9, respectively. The median number of febrile days was 3 (0 to 14) and 2 (0 to 6) for MRSA and MSSA patients, respectively (P = 0.07). The median number of days with positive blood cultures was 2 for the MRSA (n = 16) and 1 for the MSSA (n = 18) patients (P = 0.04). Conclusion. Clindamycin was effective in treating children with invasive infections caused by susceptible CA-MRSA isolates MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 76 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000184351800006 L2 - Staphylococcus aureus;methicillin resistance;clindamycin;PANTON-VALENTINE LEUKOCIDIN; EPIDEMIOLOGY; LINCOSAMIDE; ANTIBIOTICS; MACROLIDE; RISK SO - Pediatric Infectious Disease Journal 2003 ;22(7):593-598 8717 UI - 7352 AU - Martinez-Burnes J AU - Lopez A AU - Wright GM AU - Ireland WP AU - Wadowska DW AU - Dobbin GV AD - Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Dept Biomed Sci, Charlottetown, PE C1A 4P3, CanadaUniv Prince Edward Isl, Atlantic Vet Coll, Electron Microscopy Lab, Charlottetown, PE C1A 4P3, CanadaMartinez-Burnes, J, Univ Autonoma Tamaulipas, Fac Med Vet & Zootecn, Div Estudios Posgrado & Invest, Km 5 Carretera Victoria Mante,Cd Victoria, Tamaulipas 87000, Mexico TI - Ultrastructural changes in the lungs of neonatal rats intratracheally inoculated with meconium AB - Meconium aspiration syndrome has been for many years an important cause of neonatal respiratory distress in newborn babies and sporadically reported in animals. This investigation was designed to study the ultrastructural and morphometric changes in the lungs of neonatal rats following the intratracheal inoculation of meconium. Seven-day-old Fischer-344 rats (n = 24) were randomly allocated in two groups. One group was intratracheally inoculated with saline solution and the second group received homologous meconium. Neonates were euthanatized at 1, 3 and 7 postinoculation days (PID) and lungs were examined by light and electron microscopy. Saline solution did not induce any ultrastructural changes in the lung. In contrast, meconium induced deciliation, recruitment of neutrophils and pulmonary alveolar macrophages to the bronchoalveolar space, intravascular sequestration of neutrophils and aggregation of platelets at PID 1 and 3. Other ultrastructural changes at PID 1 and 3 included interstitial edema and escape of red cells and fibrin into the alveolar space and interstitium. Interstitial edema and sequestration of neutrophils were responsible for the significant increase in thickness of alveolar septa. At PID 7 there was hyperplasia and enlargement of type II pneumocytes as well as interstitial proliferation of mesenchymal cells with intra-alveolar fibrosis. It was concluded that intratracheal inoculation of meconium in neonatal rats induces acute ultrastructural changes followed by a reparative response MH - Canada MH - Mexico|Tamaulipas PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology;Pathology U5 - J;Article AV - English IS - 0213-3911 UR - ISI:000185618300010 L2 - lung;neonatal rats;ultrastructure;meconium;aspiration;RESPIRATORY-DISTRESS-SYNDROME; ASPIRATION SYNDROME; AMNIOTIC-FLUID; PIGLET MODEL; INJURY; LIPOPOLYSACCHARIDE; VENTILATION; PARENCHYMA; DIFFUSE; DAMAGE SO - Histology and Histopathology 2003 ;18(4):1081-1094 8718 UI - 7024 AU - Martinez-Espinoza AD AU - Leon-Ramirez CG AU - Singh N AU - Ruiz-Herrera J AD - Inst Politecn Nacl, Dept Ingn Genet, Unidad Irapuato, Ctr Invest & Estudios Avanzados, Guanajuato 36500, MexicoUniv Durban Westville, Dept Bot, ZA-4000 Durban, South AfricaRuiz-Herrera, J, Inst Politecn Nacl, Dept Ingn Genet, Unidad Irapuato, Ctr Invest & Estudios Avanzados, Apartado Postal 629, Guanajuato 36500, Mexico TI - Use of PCR to detect infection of differentially susceptible maize cultivars using Ustilago maydis strains of variable virulence AB - Ustilago maydis was specifically detected in infected maize plants by means of the polymerase chain reaction (PCR) using oligonucleotides corresponding to a specific region downstream of the homeodomain of the bE genes of the pathogen. The reaction gave rise to amplification of a ca. 500-bp product when tested with U. maydis DNA, but no amplification was detected with DNA from fungi not related to U. maydis. Using these primers, U. maydis was detected in infected maize plants from differentially susceptible cultivars as early as 4 days after inoculation with strains of variable degrees of virulence. Detection of U. maydis at early stages of infection. or in asymptomatic infected plants should assist in studies on plant-pathogen interactions MH - Mexico|Guanajuato MH - South Africa PB - HEIDELBERG: SPRINGER-VERLAG HEIDELBERG RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1139-6709 UR - ISI:000186379600007 L2 - PCR detection;b locus;Ustilaginales;plant infection;mating type;POLYMERASE-CHAIN-REACTION; MATING-TYPE LOCUS; CORN SMUT FUNGUS; U-MAYDIS; MUTANTS; ALLELES; GENE; DNA SO - International Microbiology 2003 ;6(2):117-120 8719 UI - 6789 AU - Martinez-Estevez M AU - Racagni-Di Palma G AU - Munoz-Sanchez JA AU - Brito-Argaez L AU - Loyola-Vargas VM AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, MexicoUniv Nacl Rio Cuarto, Dept Biol Mol, RA-5800 Cordoba, ArgentinaHernandez-Sotomayor, SMT, Ctr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, Mexico TI - Aluminium differentially modifies lipid metabolism from the phosphoinositide pathway in Coffea arabica cells AB - The effect of aluminium (AI) on phosphoinositide-specific phospholipase C (PLC) and lipid kinase activities was examined in a cellular suspension of coffee. Two main effects were seen when cells were treated with AlCl3. In periods as short as 1 minute, Al-exposed cells increased the activity of PLC and IP3 formation up to two fold. Over longer periods PLC activity was inhibited by more than 50%. The activity of phosphatidylinositol 4-kinase (PI 4-K), phosphatidylinositol phosphate 5-kinase (PIP 5-K) and diacylglycerol kinase increased when cells were incubated in the presence of different concentrations of AlCl3. The present study reports for the first time that Al may have different effects on the PI-signaling pathway depending on the time of exposure. Our results strongly support the hypothesis that Al disrupts the metabolism of membrane phospholipids regulating not only PLC but also other enzymes that have key roles in signal-transduction pathways MH - Argentina MH - Mexico|Yucatan PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000186971000002 L2 - Coffea arabica L.;phospholipase C;phospholipid kinases;Al;ROSEUS TRANSFORMED ROOTS; PHOSPHOLIPASE-C ACTIVITY; SIGNAL-TRANSDUCTION; PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE; PLANT-GROWTH; TOXICITY; INHIBITION; TOLERANCE; PROTEIN; STRESS SO - Journal of Plant Physiology 2003 ;160(11):1297-1303 8720 UI - 8254 AU - Martinez-Guarneros A AU - Balandrano-Campos S AU - Solano-Ceh MA AU - Gonzalez-Dominguez F AU - Lipman HB AU - Ridderhof JC AU - Flisser A AD - Hosp Gen Dr Manuel Gea Gonzalez SSA, Direcc Invest, Mexico City 14000, DF, MexicoInDRE, Dept Mycobacteria, Mexico City, DF, MexicoCtr Dis Control & Prevent, PHPPO, Atlanta, GA, USAFlisser, A, Hosp Gen Dr Manuel Gea Gonzalez SSA, Direcc Invest, Calzada Tlalpan 4800, Mexico City 14000, DF, Mexico TI - Implementation of proficiency testing in conjunction with a rechecking system for external quality assurance in tuberculosis laboratories in Mexico AB - SETTING: In developing countries, tuberculosis is diagnosed by identification of acid-fast bacilli (AFB) on sputum smears. OBJECTIVE: To evaluate the quality of AFB microscopy, the Mexican Secretary of Health National Reference Laboratory implemented proficiency testing for its network of 637 laboratories. DESIGN: A total of 586 (92%) laboratories were inspected and 430 technicians evaluated by proficiency testing consisting of 10 slides with known numbers of AFB. Results were compared with those of slide rechecking and with proficiency testing performed 2 years later. RESULTS: Of the 430 technicians evaluated by proficiency testing in 1998, 196 (46%) scored less than 80% and received intensive training in 1999. From a previous mean score of 65% their results increased to 90% (P < 0.0001). In 2001, they again underwent proficiency testing, and the mean score was 83%. The main factors affecting proficiency testing results were the type of laboratory in which the microscopists worked and the number of low-positive slides (1-9/100) in the test. Laboratories whose work was rechecked had better scores (P = 0.002). Proficiency testing scores and the estimated sensitivity of the microscopist's laboratory were associated (P = 0.01). CONCLUSION: External quality assessment and training improve diagnostic performance. Rechecking and proficiency testing are both viable measures of laboratory performance MH - Mexico|Distrito Federal MH - USA PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 4 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000183344300004 L2 - external quality assurance;laboratory network;proficiency testing;rechecking AFB;tuberculosis SO - International Journal of Tuberculosis and Lung Disease 2003 ;7(6):516-521 8721 UI - 8591 AU - Martinez-Mier EA AU - Soto-Rojas AE AU - Urena-Cirett JL AU - Stookey GK AU - Dunipace AJ AD - Indiana Univ, Sch Dent, Oral Hlth Res Inst, Indianapolis, IN 46202, USAUniv Intercontinental, Escuela Odontol, Mexico City, DF, MexicoMartinez-Mier, EA, Indiana Univ, Sch Dent, Oral Hlth Res Inst, 415 Lansing St, Indianapolis, IN 46202 USA TI - Fluoride intake from foods, beverages and dentifrice by children in Mexico AB - Objectives: This investigation monitored fluoride ingestion in Mexican children who were susceptible to developing dental fluorosis. Method: Total fluoride intake, from dietary and toothpaste samples, was determined in 15-36-month-old children from Mexico City and Veracruz, Mexico. A duplicate plate technique was used. Plasma fluoride levels were also determined in this group of children. Results: The children ingested a mean (+/-SD) of 0.20 +/- 0.08 and 0.18 +/- 0.07 mg fluoride/kg/day, in Mexico City and Veracruz, respectively. There was no statistically significant difference between the fluoride ingested by children in the two cities (P > 0.9). Plasma from children in Mexico City and Veracruz contained a mean of 1.30 +/- 0.81 and 0.87 +/- 0.72 mumol fluoride/l, respectively, and these values were not significantly different. Conclusions: Our results lead to the conclusion that mean fluoride ingested from the combination of foods and beverages was within the proposed safe threshold for fluoride intake of 0.05-0.07 mg F/kg/day. Most of the fluoride intake by these children was derived from the ingestion of fluoridated toothpaste. When all sources of ingested fluoride were added and total fluoride intake was calculated, the children, both in Mexico City and Veracruz, were ingesting amounts of fluoride well above the upper limits of the proposed safe threshold for fluoride intake MH - USA MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 8 U4 - Dentistry, Oral Surgery & Medicine;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0301-5661 UR - ISI:000182653500009 L2 - dietary fluoride;fluoride intake;salt fluoridation;MAXILLARY CENTRAL INCISORS; DENTAL FLUOROSIS; ENAMEL FLUOROSIS; CRITICAL PERIOD; DRINKING-WATER; UNITED-STATES; PREVALENCE; COMMUNITY; PATTERNS; SEVERITY SO - Community Dentistry and Oral Epidemiology 2003 ;31(3):221-230 8722 UI - 6673 AU - Martinez-Mir A AU - Zlotogorski A AU - Londono D AU - Gordon D AU - Grunn A AU - Uribe E AU - Horev L AU - Ruiz IM AU - Davalos NO AU - Alayan O AU - Liu J AU - Gilliam TC AU - Salas-Alanis JC AU - Christiano AM AD - Columbia Univ Coll Phys & Surg, Dept Dermatol, New York, NY 10032, USAColumbia Univ Coll Phys & Surg, Dept Genet & Dev, New York, NY 10032, USAHadassah Hebrew Univ Med Ctr, Dept Dermatol, Jerusalem, IsraelRockefeller Univ, Lab Stat Genet, New York, NY 10021, USACase Western Reserve Univ, Rammelkamp Ctr Educ & Res, Dept Epidemiol & Biostat, Cleveland, OH 44106, USAColumbia Univ, Columbia Genome Ctr, New York, NY, USANatl Univ Singapore, Genome Inst Singapore, Singapore 0511, SingaporeHosp Gen Occidente Seguro Social, Zapopan, Jalisco, MexicoUniv Autonoma Nuevo Leon, Med Serv, Dept Dermatol, Monterrey, NL, MexicoChristiano, AM, Columbia Univ Coll Phys & Surg, Dept Dermatol, 630 W 168th St VC-1526, New York, NY 10032 USA TI - Identification of a locus for type I punctate palmoplantar keratoderma on chromosome 15q22-q24 AB - Background: The identification of the molecular basis of disorders of keratinisation has significantly advanced our understanding of skin biology, revealing new information on key structures in the skin, such as the intermediate filaments, desmosomes, and gap junctions. Among these disorders, there is an extraordinarily heterogeneous group known as palmoplantar keratodermas (PPK), for which only a few molecular defects have been described. A particular form of PPK, known as punctate PPK, has been described in a few large autosomal dominant pedigrees, but its genetic basis has yet to be identified. Aim: Identification of the gene for punctate PPK. Methods: Clinical examination and linkage analysis in three families with punctate PPK. Results: A genomewide scan was performed on an extended autosomal dominant pedigree, and linkage to chromosome 15q22 - q24 was identified. With the addition of two new families with the same phenotype, we confirmed the mapping of the locus for punctate PPK to a 9.98 cM interval, flanked by markers D15S534 and D15S818 ( maximum two point lod score of 4.93 at theta = 0 for marker D15S988). Conclusions: We report the clinical and genetic findings in three pedigrees with the punctate form of PPK. We have mapped a genetic locus for this phenotype to chromosome 15q22 - q24, which indicates the identification of a new gene involved in skin integrity MH - Israel MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - USA MH - Singapore PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 5 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1468-6244 UR - ISI:000187402100002 L2 - RIGHT-VENTRICULAR CARDIOMYOPATHY; HIDROTIC ECTODERMAL DYSPLASIA; KERATIN GENE-CLUSTER; HAIR NAXOS-DISEASE; LINKAGE ANALYSIS; PACHYONYCHIA-CONGENITA; WOOLLY HAIR; VOHWINKELS-SYNDROME; OVARIAN-CANCER; HUMAN GENOME SO - Journal of Medical Genetics 2003 ;40(12):872-878 8723 UI - 6986 AU - Martinez-Mir A AU - Zlotogorski A AU - Londono D AU - Gordon D AU - Grunn A AU - Uribe E AU - Horev L AU - Ruiz IM AU - Davalos NO AU - Alayan O AU - Liu J AU - Gilliam TC AU - Salas-Alanis JC AU - Christiano AM AD - Columbia Univ, Dept Dermatol, New York, NY 10027, USAHadassah Med Ctr, Dept Dermatol, IL-91120 Jerusalem, IsraelRockefeller Univ, Lab Stat Genet, New York, NY 10021, USAColumbia Univ, Columbia Genome Ctr, New York, NY, USAHosp Gen Occidente, Zapopn, Jalisco, MexicoUniv Autonoma Nuevo Leon, Serv Med, Dept Dermatol, Monterrey, NL, MexicoColumbia Univ, Dept Genet & Dev, New York, NY, USA TI - Identification of a locus for type I punctate palmoplantar keratoderma on chromosome 15q22-24 MH - Israel MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599702359 SO - American Journal of Human Genetics 2003 ;73(5):570-570 8724 UI - 6666 AU - Martinez-Morales F AU - Schobert M AU - Lopez-Lara IM AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoTech Univ Carolo Wilhelmina Braunschweig, Inst Mikrobiol, D-38106 Braunschweig, GermanyGeiger, O, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apdo Postal 565A, Cuernavaca 62210, Morelos, Mexico TI - Pathways for phosphatidylcholine biosynthesis in bacteria AB - Phosphatidylcholine (PC) is the major membrane-forming phospholipid in eukaryotes with important structural and signalling functions. Although many prokaryotes lack PC, it can be found in significant amounts in membranes of rather diverse bacteria. Two pathways for PC biosynthesis are known in bacteria, the methylation pathway and the phosphatidylcholine synthase (PCS) pathway. In the methylation pathway, phosphatidylethanolamine is methylated three times to yield PC, in reactions catalysed by one or several phospholipid N-methyltransferases (PMTs). In the PCS pathway, choline is condensed directly with CDP-diacylglyceride to form PC in a reaction catalysed by PCS. Using cell-free extracts, it was demonstrated that Sinorhizobium meliloti, Agrobacterium tumefaciens, Rhizobium leguminosarum, Bradyrhizobium japonicum, Mesorhizobium loti and Legionella pneumophila have both PMT and PCS activities. In addition, Rhodobacter sphaeroides has PIMT activity and Brucella melitensis, Pseudomonas aeruginosa and Borrelia burgdorferi have PCS activities. Genes from M. loti and L. pneumophila encoding a Pmt or a Pcs activity and the genes from P. aeruginosa and Borrelia burgdorferi responsible for Pcs activity have been identified. Based on these functional assignments and on genomic data, one might predict that if bacteria contain PC as a membrane lipid, they usually possess both bacterial pathways for PC biosynthesis. However, important pathogens such as Brucella melitensis, P. aeruginosa and Borrelia burgdorferi seem to be exceptional as they possess only the PCS pathway for PC formation MH - Germany MH - Mexico|Morelos PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000187317000014 L2 - PHOSPHATIDYLETHANOLAMINE N-METHYLTRANSFERASE; LEGIONELLA-PNEUMOPHILA; MEMBRANE-LIPIDS; RNA-POLYMERASE; SYNTHASE; PLANT; GENE; JAPONICUM; MELILOTI; CLONING SO - Microbiology-Sgm 2003 ;149():3461-3471 8725 UI - 8598 AU - Martinez-Munoz A AU - Hewitt DG AU - Valenzuela S AU - Uvalle JI AU - Estrada AE AU - Avendano JJ AU - Aranda R AD - Univ Autonoma Nuevo Leon, Fac Ciencias Forestales, Nuevo Leon, MexicoUniv Autonoma Chapingo, Unidad Reg Univ Zonas Aridas, Bermejillo, MexicoTexas A&M Univ, Caesar Kleberg Wildlife Res Inst, Kingsville, TX 78363, USAMartinez-Munoz, A, Univ Nuevo Leon, Coll Forestry, Apartado Postal 41, Linares 67700, NL, Mexico TI - Habitat and population status of desert mule deer in Mexico AB - Historically, desert mule deer (Odocoileus hemionus crooki) were distributed across the Chihuahuan Desert region in Mexico. Overgrazing and illegal hunting have been responsible for the dramatic reduction in the desert mule deer population. Through the introduction of hunting fees, desert mule deer could represent an important source of income for Mexican producers. In addition it could stimulate programs favoring sustainable management of Chihuahuan Desert ecosystems. Twenty sample units were established across Chihuahuan Desert regions in Coahuila and Nuevo Leon, Mexico. The deer population in each unit was surveyed using diurnal and nocturnal transects. Pellet group counts were conducted to provide an additional index to deer density. In each sampling unit, 50 2 X 5 in plots were established. Vegetation cover and diversity were also determined. We used range indicators to establish vegetation condition and trend. Correlation analyses were used to evaluate relationships between the deer population and habitat variables. Desert mule deer were present in only two of the sampling units. Range condition was at risk in 18 of the 20 sampled areas and poor in the other 2. Grass cover (%) (r = 0.56), ground cover (r = 0.53), range deterioration index (r = -0.29) and downward trend index (r = -0.42) were the highest correlated variables with mule deer occurrence MH - Mexico|Durango MH - Mexico|Nuevo Leon MH - USA PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0044-2887 UR - ISI:000182509600002 L2 - desert mule deer;Odocoileus hemionus crooki;Chihuahuan Desert;Mexico;range condition;range trend;overgrazing;CATTLE SO - Zeitschrift fur Jagdwissenschaft 2003 ;49(1):14-24 8726 UI - 7539 AU - Martinez-Rios A AU - Starodumov AN AU - Po H AU - Wang Y AU - Demidov AA AD - Ctr Invest Opt AC, Leon, Gto, MexicoLaserSharp Corp, Hopkinton, MA 01748, USABoston Univ, Photon Ctr, Boston, MA 02215, USAMartinez-Rios, A, Ctr Invest Opt AC, Loma Bosque 115,Colonia Lomas Campestre, Leon, Gto, Mexico TI - Efficient operation of double-clad Yb3+-doped fiber lasers with a novel circular cladding geometry AB - A highly efficient double-clad Yb3+-doped fiber laser with a novel cladding geometry is described. A round double-clad fiber with a small D-shaped hole for breaking a circular symmetry in a cladding combines the advantages of ease of manufacture and handling round fibers with efficient absorption of pump light. Fiber lasers with a double-D cladding shape and a D-hole cladding are compared. We report what are to our knowledge the highest slope efficiencies of 73% and 69%, respectively, pumping at 915 nm. Output powers in excess of 13 W are demonstrated. (C) 2003 Optical Society of America MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000185111900008 SO - Optics Letters 2003 ;28(18):1642-1644 8727 UI - 8562 AU - Martinez-Ruiz A AU - Moreno MG AU - Takeuchi N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Ensenada 22800, Baja California, MexicoMartinez-Ruiz, A, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - First principles calculations of the electronic properties of bulk Cu2O, clean and doped with Ag, Ni, and Zn AB - Using first principles total energy calculations we have studied the electronic properties of bulk Cu2O, clean and doped with Ag, Ni and Zn. The calculated ground state structure of clean Co2O is cubic. Its lattice constant a = 4.30 Angstrom, and bulk modulus B-0 = 108 GPa are in excellent agreement with experimental values a = 4.27 Angstrom, and B-0 = 112 GPa. In its ground state, Cu2O is a semiconductor material with a small direct band gap at the Gamma point. Our calculated value of similar to0.5 eV is smaller than the experimental value of similar to2.0 eV, reflecting the problems of local density functional theory calculating the excited states. Doping with Ag, results in a reduction of the band gap. This result is important, since it implies that the band gap of Cu2O can be engineered by varying the amount of Ag in the crystal. Doping with Ni gives rise to a p-type semiconductor with the impurity levels above the valence band maximum, while doping with Zn results in a n-type semiconductor, with impurity levels above the conduction band minimum. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Mexico|Baja California MH - USA PB - PARIS CEDEX 15: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 1293-2558 UR - ISI:000182558600004 L2 - CUO SO - Solid State Sciences 2003 ;5(2):291-295 8728 UI - 7762 AU - Martinez-Sanchez JL AD - Univ Stirling, Dept Sci Biol, Stirling FK9 4LA, ScotlandMartinez-Sanchez, JL, Univ Juarez Autonoma Tabasco, Div Acad Ciencias Biol, VHS Cardenas Km 0-5, Villahermosa, Tab, Mexico TI - Nitrogen and phosphorus resorption in trees of a neotropical rain forest MH - Mexico|Tabasco MH - United Kingdom PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000184650700011 L2 - life-history strategy;Los Tuxtlas;lowland forest;Mexico;resorption proficiency;senescent leaves;MARACA ISLAND; DYNAMICS; RORAIMA; BRAZIL; LEAVES; LITTER SO - Journal of Tropical Ecology 2003 ;19():465-468 8729 UI - 9102 AU - Martinez-Vazquez DG AU - Medellin-Rodriguez FJ AU - Phillips PJ AU - Sanchez-Valdes S AD - UASLP, FCQ, Ctr Invest & Estud Posgrado, San Luis Potosi 78210, MexicoCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996, USAMedellin-Rodriguez, FJ, UASLP, FCQ, Ctr Invest & Estud Posgrado, Dr Manuel Nava 6 Zona Univ, San Luis Potosi 78210, Mexico TI - Heterogeneous nucleation of nylon 6 and PET with selected inorganic compounds AB - The effect of several inorganic compounds in the heterogeneous nucleation of poly(ethylene terephthalate) (PET) and poly(caprolactam) (nylon 6) was studied. Six inorganic chemicals were specifically selected, on the basis of their crystal structure, basal lattice dimensions, and thermal properties, in order to study the effect of temperature in their nucleation capabilities. Considering that temperature is one of the most important variables involved during processing of thermoplastics, the impact of the nucleation ability of the intentionally added heterogeneities was studied in terms of thermal conductivity, thermal expansion, and heat capacity. Six inorganic chemicals, which crystallize in the cubic system, were selected considering that they had variations in one of the thermal properties while the others remained practically constant along the temperature range of interest. The results indicated that, at constant surface area, chemical compounds with lower overall values of thermal expansion and also those with overall higher values of heat capacity promote heterogeneous nucleation; the effect of heat capacity was, however, also found potentially related to a different intrinsic mechanism. The impact of thermal conductivity was not considered significant. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Coahuila MH - Mexico|San Luis Potosi MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000181173500016 L2 - nylon 6 nucleation;PET nucleation;inorganic nucleating agents;EPITAXIAL CRYSTALLIZATION; HIGH POLYMERS; KINETICS; MACROMOLECULES; AGENTS; MELT SO - Journal of Applied Polymer Science 2003 ;88(2):360-368 8730 UI - 7821 AU - Martinez-Villa R AU - Zacharia D AD - Syracuse Univ, Dept Math, Syracuse, NY 13244, USAUNAM, Inst Matemat, Unidad Morelia, Morelia 58089, Michoacan, MexicoZacharia, D, Syracuse Univ, Dept Math, Syracuse, NY 13244, USA TI - Approximations with modules having linear resolutions AB - Let Lambda be a Koszul algebra over a field K. We study in this paper a class of modules closely related to the Koszul modules called weakly Koszul modules. It turns out that these modules have some special filtrations with modules having linear resolutions and therefore easy to describe minimal projective resolutions. We prove that if the Koszul dual of a finite-dimensional Koszul algebra is Noetherian then every finitely generated graded module has a weakly Koszul syzygy and as a consequence a rational Poincare series. If Delta is selfinjective Koszul, we prove that the stable part of each connected component of the graded Auslander-Reiten quiver containing a weakly Koszul module is of the form ZA(infinity), and if the Koszul dual of A is Noetherian, then every component has its stable part of the form ZA(infinity). (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000184435600013 L2 - Koszul algebras;weakly Koszul modules;linear projective resolutions;selfinjective algebras;SPLIT-SEQUENCES; ARTIN-ALGEBRAS; REPRESENTATION-THEORY; SERIES SO - Journal of Algebra 2003 ;266(2):671-697 8731 UI - 7066 AU - Martinez-Zerega BE AU - Pisarchik AN AU - Tsimring LS AD - Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USACtr Invest Opt, Leon 37150, Guanajuato, MexicoPisarchik, AN, Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093 USA TI - Using periodic modulation to control coexisting attractors induced by delayed feedback AB - A delay in feedback can stabilize simultaneously several unstable periodic orbits embedded in a chaotic attractor. We show that by modulating the feedback variable it is possible to lock one of these states and eliminate other coexisting periodic attractors. The method is demonstrated with both a logistic map and a CO2 laser model. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000186377900015 L2 - MULTISTABLE SYSTEMS; CONTROLLING CHAOS; ADAPTIVE-CONTROL; SHILNIKOV CHAOS; BISTABLE SYSTEM; LASER; DYNAMICS; BEHAVIOR; ORBITS; SYNCHRONIZATION SO - Physics Letters A 2003 ;318(1-2):102-111 8732 UI - 8293 AU - Martinez A AU - Patrykiejew A AU - Pizio O AU - Sokolowski S AD - UNAM, Fac Quim, Mexico City, DF, MexicoMarie Curie Sklodowska Univ, Fac Chem, Dept Modelling Phys Chem Proc, PL-20031 Lublin, PolandUNAM, Inst Chem, Mexico City 04510, DF, MexicoMartinez, A, UNAM, Fac Quim, Mexico City, DF, Mexico TI - Phase diagrams for a binary mixture confined in narrow slitlike pores with energetically heterogeneous walls from a lattice mean-field approach AB - We investigate the phase behaviour of binary symmetric lattice fluid, exhibiting partial demixing in slitlike pores with heterogeneous walls. The calculations are carried out assuming a cubic lattice with vacancies and a model for heterogeneity similar to that of Rocken and Tarazona (1996 J. Chem. Phys. 105 2034). We concentrate on the effects of surface heterogeneity on the scenarios for the phase transformations. It is shown that for wide enough pores a stepwise condensation occurs between demixed phases. For narrower pores the lambda-line may cross the boundaries of the bridge phase and multiple critical end points appear. In such cases, at low temperatures the bridge phase formation occurs between demixed phases, at intermediate temperature it involves mixed and demixed phases and finally it becomes a transition between two demixed phases again MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000183284000020 L2 - CAPILLARY CONDENSATION; ADSORPTION; BEHAVIOR; TRANSITIONS; EQUILIBRIA; GAS SO - Journal of Physics-Condensed Matter 2003 ;15(19):3107-3119 8733 UI - 8387 AU - Martinez A AU - Pizio O AU - Patrykiejew A AU - Sokolowski S AD - UNAM, Fac Quim, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Dept Modelling Phys Chem Proc, PL-20031 Lublin, PolandMartinez, A, UNAM, Fac Quim, Mexico City, DF, Mexico TI - Phase behaviour of symmetric binary mixtures with partially miscible components in slit-like pores. Application of the fundamental measure density functional approach AB - We investigate adsorption in slit-like pores of model symmetric binary mixtures exhibiting demixing in bulk phase, by using a density functional approach. Our focus is on the evaluation of the first-order phase transitions in adsorbed fluids and the lines separating mixed and demixed phases. The scenario for phase transitions is sensitive to the pore width and to the energy of adsorption. Both these parameters can change the phase diagrams of the confined fluid. In particular, for relatively wide pores and for strong wall-fluid interactions, the demixing line can precede the first-order transition. Moreover, a competition between layering transitions and demixing within particular layers also leads to further enrichment of the phase diagram MH - Mexico|Distrito Federal MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000183072700008 L2 - LENNARD-JONES MIXTURES; LIQUID-LIQUID; FLUID MIXTURE; POROUS MATRIX; SHAPED PORES; MONTE-CARLO; ADSORPTION; TRANSITIONS; SIMULATION; INTERFACES SO - Journal of Physics-Condensed Matter 2003 ;15(14):2269-2283 8734 UI - 8455 AU - Martinez A AU - Simard B AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoNatl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, CanadaUniv Calgary, Calgary, AB T2N 1N4, CanadaMartinez, A, Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Interaction of Y, Y-2, Mo, and Mo-2 with NH3. A density functional study AB - The interaction of Y, Y-2, Mo, and Mo-2 with NH3 is Studied to understand the influence of the electronic configuration of the transition metal atoms and clusters on their reactions with ammonia. The interactions are investigated with the all-electron linear combination of Gaussian-type orbitals Kohn-Sham density functional theory (LCGTO-KS-DFT). The binding energies and harmonic frequencies characterize the equilibrium geometries. The reaction products investigated are MNH3, MNH, M2NH3, M2NH, and M-2(NH)(2). The binding energy indicates that the reaction of Y and Y-2 is possible. For Y, the stable products are YNH3 and YNH with binding energies of 24.6 and 32.6 kcal/mol, respectively. For Y-2, the stable products of the reaction are Y2NH3, Y2NH, and Y-2(NH)(2) (binding energies of 13.9, 55.5, and 110.2 kcal/mol, respectively). For Mo, the stable product is MoNH3 with a binding energy of 8.5 kcal/mol. For MoNH, the binding energies indicate that the reactants (Mo + NH3) are more stable than the products (MoNH + H-2) by 9.8 kcal/mol. For the Mo-2[NH3] complex, the binding energy is 17.9 kcal/mol, in good agreement with the experimental value of 14 kcal/mol previously reported. For Mo-2, there are no other stable products of the reaction because Mo2NH and Mo-2(NH)(2) are less stable than the reactants (Mo-2 + NH3) by 12.7 and 10.9 kcal/mol, respectively. The differences in the bonding are explained with molecular orbital pictures. For each metal, a relationship between the electronic configurations of the transition metals and the binding energies is reported MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000182933600017 L2 - EFFECTIVE CORE POTENTIALS; TRANSITION-METAL ATOMS; MOLECULAR CALCULATIONS; ALUMINUM CLUSTERS; ENERGY; SPECTROSCOPY; GEOMETRIES; MOLYBDENUM; EXCHANGE; AMMONIA SO - Journal of Physical Chemistry A 2003 ;107(20):4136-4140 8735 UI - 8780 AU - Martinez A AU - Tenorio FJ AU - Ortiz JV AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoOrtiz, JV, Kansas State Univ, Dept Chem, Manhattan, KS 66506, USA TI - Al3O4 and Al3O4- clusters: Structure, bonding, and electron binding energies AB - Structure and bonding in neutral and anionic Al3O4 clusters are studied with electronic structure calculations. Geometry optimizations with the B3LYP/6-311+G(2d) density functional method produce several minima, some with distinct multiplicities, for each molecule and anion. The most stable anionic structures are confirmed with additional geometry optimizations at the QCISD level. Equilibrium geometries, harmonic frequencies, and atomic charges are presented. These results, in combination with assignments of photoelectron spectra based on ab initio electron propagator theory, explain the energetic preference of anions for planar structures, while, in contrast, uncharged clusters favor three-dimensional geometries MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000182042400024 L2 - PHOTOELECTRON-SPECTRA; N=1-3 CLUSTERS; PHOTOISOMERIZATION; ALO2 SO - Journal of Physical Chemistry A 2003 ;107(14):2589-2595 8736 UI - 8930 AU - Martinez A AU - Pizio O AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Dept Modeling Physicochem Proc, PL-20031 Lublin, PolandMartinez, A, Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Phase behavior of symmetric binary mixture with partially miscible components in slitlike pores: Density functional approach AB - We investigate adsorption of a model symmetric binary mixture, exhibiting demixing in a bulk phase, in slitlike pores by using a density functional approach. Our focus is on the evaluation of the first-order phase transitions between adsorbed phases and lines delimiting mixed and demixed adsorbed phases. The scenario for phase changes is sensitive to the pore width and to the energy of adsorption. Both these parameters can qualitatively change the phase behavior of the confined fluid. In particular, for relatively wide pores and for strong wall-fluid interactions, a demixing line can precede the first-order transition. Moreover, a competition between layering type behavior and demixing within particular layers also can lead to further complications of the phase diagram, reflected by the presence of consecutive branches, describing the equilibrium between different adsorbed phases. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000181667900035 L2 - LENNARD-JONES MIXTURES; MONTE-CARLO SIMULATION; FLUID MIXTURE; LIQUID-LIQUID; POROUS MATRIX; SHAPED PORES; ADSORPTION; TRANSITIONS; INTERFACES; MODEL SO - Journal of Chemical Physics 2003 ;118(13):6008-6016 8737 UI - 8523 AU - Martinez CE AU - Vinay JC AU - Brieva R AU - Hill CG AU - Garcia HS AD - UNIDA, Inst Tecnol Veracruz, Veracruz 91897, MexicoInst Tecnol Tuxtepec, Coordinac Postgrado & Invest, Tuxtepec 68300, Oax, MexicoUniv Oviedo, Fac Quim, E-33071 Oviedo, SpainUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USAGarcia, HS, UNIDA, Inst Tecnol Veracruz, MA de Quevedo 2779, Veracruz 91897, Mexico TI - Lipase-catalyzed acidolysis of corn oil with conjugated linoleic acid in hexane AB - Lipase-mediated acidolysis of corn oil with conjugated linoleic acid (CLA) was studied in hexane. The largest extent of incorporation was obtained using a weight ratio of CLA to corn oil of 1:7 (1:2.22 mole ratio). Commercial immobilized lipases from Rhizomucor miehei and Candida antarctica effectively catalyzed interesterification. Of the total acylglycerols in the products, triacylglycerols constituted > 90%. For both immobilized enzymes, CLA residues were esterified mainly at the sn-1, 3 positions MH - Mexico|Oaxaca MH - Mexico|Veracruz MH - Spain MH - USA PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1065-7258 UR - ISI:000182721800002 L2 - PERFORMANCE LIQUID-CHROMATOGRAPHY; FATTY-ACIDS; INTERESTERIFICATION ACIDOLYSIS; POSITIONAL DISTRIBUTION; TRIACYLGLYCEROLS; TRIGLYCERIDES; METABOLISM; ENRICHMENT; BUTTEROIL; SOLVENTS SO - Journal of Food Lipids 2003 ;10(1):11-24 8738 UI - 7030 AU - Martinez E AU - Fundora A AU - Blanco O AU - Siqueiros JM AD - CICESE, Phys Mat Grad Program, Ensenada 22800, Baja California, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoMartinez, E, CICESE, Phys Mat Grad Program, Km 107 Carr Tijuana, Ensenada 22800, Baja California, Mexico TI - Dielectric and structural properties of PST films deposited by RF ion sputtering on LSCO/Si substrates AB - Pb0.5Sr0.5TiO3 (PST) films have been obtained by RF ion sputtering on (La0.5Sr0.5)CoO3 substrates (LSCO). The purpose of this work is to investigate the relation between the crystalline structure and the dielectric properties of PST films grown on LSCO electrodes. PST films were deposited at 400degreesC in a fixed argon/oxygen (50/50) atmosphere. After deposition, PST films were post-annealed at different temperatures. Scanning Electron Microscopy (SEM) and X-Ray Diffraction were used for the structural studies. Crystallinity and surface morphology revealed a strong dependence on the crystallization conditions. The dielectric properties of the Pt/PST/LSCO/Si films were characterized through Capacitance (C) vs. Voltage (V) curves, Polarization (P) vs. Electric Field (E) curves and Current (I) vs Voltage (V) measurements. Leakage currents were also evaluated at each postannealing temperature MH - Cuba MH - Mexico|Baja California PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000186526300015 L2 - RF ion sputtering;PbxSr1-xTiO thin film;leakage current;conducting oxide;THIN-FILMS; FERROELECTRIC CAPACITORS; LA0.5SR0.5COO3 SO - Ferroelectrics 2003 ;293():153-159 8739 UI - 7407 AU - Martinez F AU - Gomez E AU - Douglas JT AU - Curiel DT AU - Gutierrez AA AD - Ctr Nacl Rehabil, Cell Therapy Unit, Mexico City, DF, MexicoUNAM, Sch Med, Dept Pathol, Mexico City, DF, MexicoUniv Alabama, Gene Therapy Ctr, Birmingham, AL, USA TI - Modulation of transcriptional activity of egr-1 promoter mediated by GM-CSF in human gliomas MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Meeting Abstract AV - English IS - 1525-0016 UR - ISI:000182740300771 SO - Molecular Therapy 2003 ;7(5):S298-S298 8740 UI - 7408 AU - Martinez F AU - Douglas JT AU - Gutierrez AA AD - Ctr Nacl Rehabil, Cell Therapy Unit, Mexico City, DF, MexicoUNAM, Sch Med, Dept Pharmacol, Mexico City, DF, MexicoUniv Alabama, Gene Therapy Ctr, Birmingham, AL, USA TI - Effects of steroid drugs in glioma cell lines transduced with ad-egr-1 luciferase vector MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Meeting Abstract AV - English IS - 1525-0016 UR - ISI:000182740301150 SO - Molecular Therapy 2003 ;7(5):S443-S444 8741 UI - 9200 AU - Martinez G AU - Christian P AU - Marina C AU - Williams T AD - ECOSUR, Chiapas 30700, MexicoCSIRO, Canberra, ACT 2601, AustraliaNatl Inst Stand & Biol Control, Potters Bar, Herts, EnglandINSP, Ctr Invest Paludismo, Chiapas 30700, MexicoUniv Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainWilliams, T, ECOSUR, Apdo Postal 36, Chiapas 30700, Mexico TI - Sensitivity of Invertebrate iridescent virus 6 to organic solvents, detergents, enzymes and temperature treatment AB - The sensitivity of Invertebrate iridescent virus 6 (IIV-6) to a selection of organic solvents, detergents, enzymes and heat treatment was assayed in Spodoptera frugiperda (Sf9) cells and by injection of inoculum into larvae of Galleria mellonella. In several cases, the degree of sensitivity of the virus depended on the method of assay; cell culture assays indicated greater losses of activity than insect bioassay. IIV-6 was sensitive to chloroform but sensitivity to ether was only detected by cell culture assay. Sensitivity (defined as a reduction of at least 1 log activity) was detected following treatment by 1 and 0.1% SDS, 1% Triton-X100, 70%) ethanol, 70%) methanol, 1% sodium deoxycholate, pH 11.1 and 3.0. No sensitivity was detected to 1% Tween 80, 1 M MgCl2, 100 mM EDTA, lipase, phospholipase A2, proteinase K, or trypsin at the concentrations tested. Viral activity was reduced by approximately 4 logs following heating to 70 degreesC for 60 min or 80 degreesC for 30 min. The above observations highlight the need for studies on the role of the virus lipid component in the process of particle entry into cells, and may explain why vertebrate and invertebrate iridoviruses have been reported to differ in their sensitivity to organic solvents and enzymes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Australia MH - United Kingdom MH - Mexico|Chiapas MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Virology U5 - J;Article AV - English IS - 0168-1702 UR - ISI:000180907100011 L2 - Invertebrate iridescent virus 6;Spodoptera frugiperda;Galleria mellonella;lipid membrane;iridovirus;internal;TRANS-GOLGI NETWORK; REPLICATION; INFECTION; DISEASE; FISH SO - Virus Research 2003 ;91(2):249-254 8742 UI - 8782 AU - Martinez JMR AU - Ravani B AD - Inst Tecnol Celaya, Dept Ingn Mecan Celaya, Celaya 38000, Gto, MexicoUniv Calif Davis, Dept Mech & Aeronaut Engn, Davis, CA 95616, USAMartinez, JMR, Inst Tecnol Celaya, Dept Ingn Mecan Celaya, Celaya 38000, Gto, Mexico TI - On mobility analysis of linkages using group theory AB - This paper presents a generalization of Kutzbach-Grubler criterion for mobility analysis of kinematic chains based on group theory. This new mobility criterion applies to exceptional linkages and reduces to a group theoretic representation of Kutzbach-Grubler criterion for trivial linkages. Furthermore, it is shown that using sets and groups of Euclidean displacements, one can distinguish between trivial, exceptional, and paradoxical linkages. Using these concepts, formal definitions of trivial, exceptional, and paradoxical linkages are presented and it is shown that there are two classes of paradoxical linkages. This work builds upon and extends the work of Herve and Fanghella and Galletti in application of group theory to analysis of kinematic chains MH - Mexico|Guanajuato MH - USA PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 1050-0472 UR - ISI:000182020100009 L2 - ADJACENT JOINT AXES; DISPLACEMENT GROUPS; KINEMATIC LOOPS; MECHANISM; ALGEBRA SO - Journal of Mechanical Design 2003 ;125(1):70-80 8743 UI - 5856 AU - Martinez K AU - Cortes F AU - Leal I AU - Reyna V AU - Quintana D AU - Antunez S AU - Cuevas G AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoLa Salle Univ, Escuela Ciencias Quim, Mexico City 06140, DF, MexicoInst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Unidad Legaria, Mexico City 01500, DF, MexicoColl San Mateo, San Mateo, CA 94402, USACuevas, G, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Toward the origin of the conformational preference of 2-methoxyoxane, a model useful to study the anomeric effect AB - The potential energy curves resulting from the C-2-O-exo bond rotation of 2-OMeOxane were calculated. One minimum was found for the axial conformer at MP2/6-31G(d, p); B3LYP/6-31G( d, p); and HF/6-31G(d, p) levels, and two minima in the equatorial conformer. The difference in the entropy of mixing between both conformers has a positive value, close to zero, which means that the entropy is higher for the equatorial conformer. The Scheme of rotation of the methoxy group at position 2 of oxane with six conformers, usually employed to describe this conformational process, is inadequate MH - Mexico|Distrito Federal MH - USA PB - GAINESVILLE: ARKAT USA INC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English UR - ISI:000220556800014 L2 - anomeric effect;conformational analysis;2-methoxyoxane;ADJACENT ELECTRON PAIRS; MECHANICS FORCE-FIELD; STEREOCHEMICAL CONSEQUENCES; GLYCOSIDIC LINKAGE; RING INVERSION; POLAR BONDS; TETRAHYDROPYRANS; EQUILIBRIA; 2-METHOXYTETRAHYDROPYRAN; SACCHARIDES SO - Arkivoc 2003 ;():132-148 8744 UI - 6680 AU - Martinez NA AU - Rodriguez JG AU - Aguilar CN AU - Montanez JC AU - Hours RA AU - Contreras-Esquivel JC AD - Univ Autonoma Coahuila, Sch Chem, Food Res Dept, Sect Polysaccharides & Polysaccharidases, Coahuila, MexicoUniv Autonoma Coahuila, Escuela Ciencias Biol, Coahuila, MexicoUniv Autonoma Coahuila, Fac Ciencias Quim, Dept Invest Alimentos, Coahuila, MexicoUniv Nacl La Plata, Fac Ciencias Exactas, CINDEFI, RA-1900 La Plata, ArgentinaContreras-Esquivel, JC, Univ Autonoma Coahuila, Sch Chem, Food Res Dept, Sect Polysaccharides & Polysaccharidases, POB 252-ZIP 25001, Coahuila, Mexico TI - Pectinmethylesterase extraction from jicama (Pachyrhizus erosus L. Urban) AB - Optimal conditions for the extraction of pectinmethylesterase from jicama (Pachyrhizus erosus (L.) Urban) roots have been established. A factorial design with three independent variables was applied in this study as method for enzyme extraction in which the variables were extracting solution (NaCl), incubation time and pH. All factors influenced the extraction process of pectinmethylesterase from jicama roots. The maximum enzyme extraction was obtained by using 1.5 M NaCl concentration, pH 7.0 and at 8-hrs incubation time MH - Argentina MH - Mexico|Coahuila PB - SEOUL: KOREAN SOC FOOD SCIENCE TECHNOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1226-7708 UR - ISI:000187390200017 L2 - yam bean;pectinesterase;pectin;solubilization;PECTINESTERASE EXTRACTION SO - Food Science and Biotechnology 2003 ;12(2):187-190 8745 UI - 8890 AU - Marziani P AU - Sulentic JW AU - Zamanov R AU - Calvani M AU - Dultzin-Hacyan D AU - Bachev R AU - Zwitter T AD - Osserv Astron Padova, INAF, I-35122 Padua, ItalyUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Ljubljana, Dept Phys, SI-1000 Ljubljana, SloveniaMarziani, P, Osserv Astron Padova, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy TI - An optical spectroscopic atlas of low-redshift active galactic nuclei AB - We present a spectral atlas of the Hbeta region for 215 type 1 AGNs ( luminous Seyfert 1/radio galaxy nuclei and low-z quasars) up to z approximate to 0.8. Line profiles and measures were derived from the database of intermediate resolution spectra ( R e 1000) with average continuum level S/N ratio approximate to30. Parameters including rest frame equivalent width and FWHM are provided for the Fe IIopt blend at lambda4570, Hbeta, He II lambda4686, and the [O III] lambdalambda4959, 5007 emission lines. We extract clean broad component Hbeta profiles and provide wavelength measurements at 0, 1/4, 1/2, 3/4, and 0.9 peak intensity levels in order to permit a quantitative definition of the Hbeta broad component for statistical studies. We also discuss sources of uncertainty, selection effects, and biases in our sample. The data are especially important for tests of the eigenvector 1 parameter space occupation and correlation. We show that the I Zw 1 template Fe IIopt spectrum reproduces well the observed Fe IIopt emission for a wide range of line width and strength. A detailed analysis of the data within the eigenvector 1 context is deferred to a companion paper MH - Italy MH - Mexico|Distrito Federal MH - Slovenia MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 46 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000181714900001 L2 - atlases;galaxies : active;galaxies : nuclei;quasars : emission lines;quasars : general;BROAD-LINE REGION; SEYFERT-1 GALAXIES; CORRELATION SPACE; EMISSION; IONIZATION; QUASARS; QSOS; EIGENVECTOR-1; DIFFERENCE SO - Astrophysical Journal Supplement Series 2003 ;145(2):199-211 8746 UI - 8895 AU - Marziani P AU - Dultzin-Hacyan D AU - D'Onofrio M AU - Sulentic JW AD - Ist Nazl Astrofis, Osservatorio Astron Padova, I-35122 Padua, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Padua, Dipartimento Astron, I-35122 Padua, ItalyUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAMarziani, P, Ist Nazl Astrofis, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy TI - ARP 194: Evidence of tidal stripping of gas and cross-fueling AB - We present new imaging and spectroscopic observations of the interacting system Arp 194 (=UGC 6945 = VV 126). The northern component (A194N) is a distorted spiral or ring galaxy likely disrupted by a collision or close encounter with a southern galaxy (A194S). There is evidence that a third galaxy with similar recession velocity is projected on A194N, but its role is likely secondary. A194S is connected to A194N by a string of emission knots, which motivates our interpretation that the former was the intruder. Three of the knots are easily discernible in B, R, and Halpha images and are assumed to trace the path of the intruder following the encounter, which we estimate occurred a few times 10(8) yr ago. Both A194S and A194N are experiencing strong bursts of star formation: the Halpha luminosity indicates a total star formation rate similar to10 M. yr(-1). The lack of detectable J and K emission from the blobs, along with strong Halpha emission, indicates that an evolved stellar population is not likely to be present. The brightest knot (closest to A194S) shows a star formation rate of approximate to1.2 M. yr(-1), which, if sustained over a time approximate to7 x 10(7) yr, could explain the spectral energy distribution. This suggests that the stripped matter was originally predominantly gaseous. The brightest knot is detected as a FIRST radio source, and this is likely the signature of supernova remnants related to enhanced star formation. Motions in the gas between the brightest knot and A194S, traced by an emission line link of increasing radial velocity, suggests infall toward the center of the intruder. Arp 194 is therefore one of the few galaxies where evidence of "cross-fueling'' is observed MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000181713100020 L2 - galaxies : individual (Arp 194);galaxies : interactions;galaxies : kinematics and dynamics;galaxies : nuclei;galaxies : starburst;INTERACTING-SYSTEM NGC-7592; COLLISIONAL RING GALAXIES; MERGING DISK GALAXIES; STAR-FORMATION; RADIO-EMISSION; SEYFERT-GALAXIES; NGC-7714/7715 ARP-284; SUPERNOVAE; PAIR; GASDYNAMICS SO - Astronomical Journal 2003 ;125(4):1897-1907 8747 UI - 6762 AU - Mas-Hesse JM AU - Kunth D AU - Tenorio-Tagle G AU - Leitherer C AU - Terlevich RJ AU - Terlevich E AD - INTA, Lab Astrofis & Fis Fundamental, CSIC, Ctr Astrobiol, Madrid, SpainInst Astrophys, F-75014 Paris, FranceInst Nacl Astrofis Opt & Elect, Puebla, MexicoSpace Telescope Sci Inst, Baltimore, MD 21218, USAMas-Hesse, JM, INTA, Lab Astrofis & Fis Fundamental, CSIC, Ctr Astrobiol, Madrid, Spain TI - Ly alpha emission in starbursts: Implications for galaxies at high redshift AB - We present the results of a high-resolution UV two-dimensional spectroscopic survey of star-forming galaxies observed with Hubble Space Telescope Space Telescope Imaging Spectrograph. Our main aim is to map the Lyalpha profiles to learn about the gas kinematics and its relation with the escape of Lyalpha photons and to detect extended Lyalpha emission due to scattering in gaseous halos. We have combined our data with previously obtained UV spectroscopy on three other star-forming galaxies. We find that the P Cygni profile is spatially extended, smooth, and spans several kiloparsecs covering a region much larger than the starburst itself. We propose a scenario whereby an expanding supershell is generated by the interaction of the combined stellar winds and supernova ejecta from the young starbursts, with an extended low-density halo. The variety of observed Lyalpha profiles both in our sample and in high-redshift starbursts is explained as phases in the time evolution of the supershell expanding into the disk and halo of the host galaxy. The observed shapes, widths, and velocities are in excellent agreement with the supershell scenario predictions and represent a time sequence. We confirm that among the many intrinsic parameters of a star-forming region that can affect the properties of the observed Lyalpha profiles, velocity and density distributions of neutral gas along the line of sight are by far the dominant ones, while the amount of dust will determine the intensity of the emission line, if any MH - France MH - Mexico|Puebla MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 28 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000187149300012 L2 - galaxies : halos;galaxies : high-redshift;galaxies : ISM;galaxies : starburst;ISM : bubbles;ultraviolet : galaxies;STAR-FORMING GALAXIES; LYMAN-BREAK GALAXIES; H-II REGIONS; PRIMEVAL GALAXIES; STELLAR POPULATIONS; PRIMORDIAL GAS; YOUNG GALAXIES; LINE FORMATION; HII GALAXIES; SPECTROSCOPY SO - Astrophysical Journal 2003 ;598(2):858-877 8748 UI - 7566 AU - Masdeu-Bulto AM AU - Dieguez M AU - Martin E AU - Gomez M AD - Univ Rovira & Virgili, Dept Quim Fis & Inorgan, E-43005 Tarragona, SpainUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Quim Inorgan, E-08028 Barcelona, SpainMasdeu-Bulto, AM, Univ Rovira & Virgili, Dept Quim Fis & Inorgan, Pl Imperial Tarraco 1, E-43005 Tarragona, Spain TI - Chiral thioether ligands: coordination chemistry and asymmetric catalysis AB - This review covers the recent applications of chiral thioether ligands in asymmetric catalysis with transition metal complexes. S,S-Homo and S,X-heterodonor ligands are considered with special emphasis to their coordination chemistry. The results obtained with metal/thioether containing catalytic systems in asymmetric allylic substitution, hydrogenation, transfer hydrogenation, hydrosilylation, Michael addition, 1,4-conjugate addition and copolymerization reactions are reviewed including mechanistic considerations. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 54 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0010-8545 UR - ISI:000185166600013 L2 - chiral thioether;asymmetric catalysis;transition metal complexes;homogeneous catalysis;ALLYLIC SUBSTITUTION-REACTIONS; X-RAY STRUCTURE; TRANSITION-METAL COMPLEXES; PAUSON-KHAND REACTION; CONJUGATE ADDITION; DITHIOETHER LIGANDS; FERROCENYL LIGANDS; OXAZOLINE LIGANDS; RHODIUM COMPLEXES; IRIDIUM COMPLEXES SO - Coordination Chemistry Reviews 2003 ;242(1-2):159-201 8749 UI - 8271 AU - Masera OR AU - Garza-Caligaris JF AU - Kanninen M AU - Karjalainen T AU - Liski J AU - Nabuurs GJ AU - Pussinen A AU - de Jong BHJ AU - Mohren GMJ AD - UNAM, Inst Ecol, Morelia 58089, Michoacan, MexicoCATIE, Turrialba 7170, Costa RicaEuropean Forest Inst, FIN-80100 Joensuu, FinlandALTERRA, NL-6700 AA Wageningen, NetherlandsEl Colegio Frontera Sur, Villahermosa, Tab, MexicoWageningen Univ, Forest Ecol & Forest Management Grp, Dept Environm Sci, NL-6700 AH Wageningen, NetherlandsFinnish Forest Res Inst, FIN-80101 Joensuu, FinlandMasera, OR, UNAM, Inst Ecol, AP 27-3,Xangari, Morelia 58089, Michoacan, Mexico TI - Modeling carbon sequestration in afforestation, agroforestry and forest management projects: the CO2FIX V.2 approach AB - The paper describes the Version 2 of the CO2FIX (CO2FIX V.2) model, a user-friendly tool for dynamically estimating the carbon sequestration potential of forest management, agroforesty and afforestation projects. CO2FIX V.2 is a multi-cohort ecosystem-level model based on carbon accounting of forest stands, including forest biomass, soils and products. Carbon stored in living biomass is estimated with a forest cohort model that allows for competition, natural mortality, logging, and mortality due to logging damage. Soil carbon is modeled using five stock pools, three for litter and two for humus. The dynamics of carbon stored in wood products is simulated with a set of pools for short-, medium- and long-lived products, and includes processing efficiency, re-use of by-products, recycling, and disposal forms. The CO2FIX V.2 model estimates total carbon balance of alternative management regimes in both even and uneven-aged forests, and thus has a wide applicability for both temperate and tropical conditions. Results for the model testing and validation in selected temperate and tropical forest management systems are presented and discussed. (C) 2003 Elsevier Science B.V. All rights reserved MH - Costa Rica MH - Finland MH - Mexico|Michoacan MH - Mexico|Tabasco MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 36 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000183394200006 L2 - model;forests;carbon sequestration;forest management;afforestation;agroforestry;Kyoto protocol;DECOMPOSITION RATES; ORGANIC-CARBON; CLIMATE-CHANGE; WOOD PRODUCTS; GROWTH-MODEL; FINLAND; SOIL; LITTER; SECTOR; STANDS SO - Ecological Modelling 2003 ;164(2-3):177-199 8750 UI - 8617 AU - Massart D AD - CIMAT, Guanajuato, Gto, MexicoUniv Montpellier 2, GTA, UMR 5030, CNRS, F-34095 Montpellier, FranceMassart, D, CIMAT, Guanajuato, Gto, Mexico TI - On Aubry sets and Mather's action functional AB - We study Lagrangian systems on a closed manifold M. We link the differentiability of Mather's beta-function with the topological complexity of the complement of the Aubry set. As a consequence, when M is a closed, orientable surface, the differentiability of the beta-function at a given homology class is forced by the irrationality of the homology class. This allows us to prove the two-dimensional case of a conjecture by Mane MH - France MH - Mexico|Guanajuato PB - JERUSALEM: MAGNES PRESS RP - NOT IN FILE U3 - TC 8 U4 - Mathematics U5 - J;Article AV - English IS - 0021-2172 UR - ISI:000182551000006 L2 - LAGRANGIAN SYSTEMS; MINIMIZING MEASURES; ORBITS SO - Israel Journal of Mathematics 2003 ;134():157-171 8751 UI - 7055 AU - Massey P AU - Henning PA AU - Kraan-Korteweg RC AD - Lowell Observ, Flagstaff, AZ 86001, USAUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoMassey, P, Lowell Observ, 1400 W Mars Hill Rd, Flagstaff, AZ 86001, USA TI - A neighboring dwarf irregular galaxy hidden by the Milky Way AB - We have obtained VLA and optical follow-up observations of the low-velocity H I source HIZSS 3 discovered by Henning et al. and Rivers in a survey for nearby galaxies hidden by the disk of the Milky Way. Its radio characteristics are consistent with this being a nearby (similar to1.8 Mpc) low-mass dwarf irregular galaxy (dIm). Our optical imaging failed to reveal a resolved stellar population but did detect an extended Halpha emission region. The location of the Halpha source is coincident with a partially resolved H I cloud in the 21 cm map. Spectroscopy confirms that the H source has a similar radial velocity to that of the H I emission at this location, and thus we have identified an optical counterpart. The Halpha emission (100 pc in diameter and with a luminosity of 1.4x10(38) ergs s(-1)) is characteristic of a single H II region containing a modest population of OB stars. The galaxy's radial velocity and distance from the solar apex suggests that it is not a Local Group member, although a more accurate distance is needed to be certain. The properties of HIZSS 3 are comparable to those of GR 8, a nearby dIm with a modest amount of current star formation. Further observations are needed to characterize its stellar population, determine the chemical abundances, and obtain a more reliable distance estimate MH - Mexico|Guanajuato MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000186494200020 L2 - galaxies : irregular;Local Group;LOCAL GROUP; NEARBY GALAXIES; STAR-FORMATION; GR-8; VELOCITIES; CATALOG; REGIONS; DUST; MASS; FLOW SO - Astronomical Journal 2003 ;126(5):2362-2367 8752 UI - 8460 AU - Massie S AU - Randel W AU - Wu F AU - Baumgardner D AU - Hervig M AD - Natl Ctr Atmospher Res, Boulder, CO 80307, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoGATS Inc, Driggs, ID 83422, USAMassie, S, Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307, USA TI - Halogen Occultation Experiment and Stratospheric Aerosol and Gas Experiment II observations of tropopause cirrus and aerosol during the 1990s AB - [1] Averages of Halogen Occultation Experiment (HALOE) aerosol extinction at 121 hPa for 1993-1999 and Stratospheric Aerosol and Gas Experiment (SAGE II) aerosol extinction between 100 and 140 hPa for 1987-1999 are analyzed in the tropics (20degreesS-20degreesN). Multiple wavelength techniques for HALOE and SAGE II data are used to distinguish cirrus from aerosol observations following the eruption of Mount Pinatubo in 1991. SAGE II and HALOE cirrus extinction values are 34 and 28% less, respectively, in 1993 than in 1995-1999, while aerosol extinction decreases over the same time period. SAGE II and HALOE decreases in the frequency of occurrence of cirrus in 1993 are qualitatively similar to the SAGE II decreases in the frequency of occurrence of cirrus, discussed by Wang et al. [1995], after the eruption of El Chichon. Tropopause temperature anomalies in 1993 most likely do not account for the decrease in cirrus observed in 1993 by both the HALOE and SAGE II experiments MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000182839600008 L2 - cirrus;aerosol;tropopause;satellite;observations;LONGWAVE RADIATION DATASET; CROSSING TIME BIASES; TROPICAL TROPOPAUSE; UPPER TROPOSPHERE; VERTICAL PROFILES; OPTICALLY THIN; CLOUDS; ICE; DEHYDRATION; VALIDATION SO - Journal of Geophysical Research-Atmospheres 2003 ;108(D7): 8753 UI - 9430 AU - Mata-Jimenez M AU - Brogliato B AD - Univ Nuevo Leon, Fac Elect & Mech Engn, San Nicolas de los Garza, Nuevo Leon, MexicoZIRST Monbonnot, INRIA Rhone Alpes, F-38334 St Ismier, FranceMata-Jimenez, M, Univ Nuevo Leon, Fac Elect & Mech Engn, CU Pedro Alba S-N, San Nicolas de los Garza, Nuevo Leon, Mexico TI - Analysis of proportional-derivative and nonlinear control of mechanical systems with dynamic backlash AB - In this paper, we focus on the analysis and control of a, simple rigid-body mechanical system with clearance. Contrary to most of the existing works in the literature concerning control, we explicitly treat all the nonlinear non-smooth characteristics of this system considered as a rigid-body mechanical system with unilateral constraints and impacts (dynamic backlash). The model is therefore a hybrid dynamical system, mixing discrete events as well as continuous states. The regulation and tracking capabilities of the proportional-derivative (PD) scheme are investigated. In particular, a complete proof of the existence of a limit cycle for non-collocated PD control is provided, including viability constraints. It is concluded that tracking requires the development of specific control schemes. Consequently, we propose a hybrid control that may be used to track some desired trajectories in conjunction with a PD input. Throughout the paper, the particular features of unilaterally constrained mechanical systems are taken into account, such as the fundamental viability property of closed-loop solutions and controls. This work is a new approach. to be considered for application. in several areas including the control of kinematic chains with joint clearance and vibro-impact systems, as well as liquid slosh control. Numerical results are presented to illustrate the possible performance of the proposed control scheme and its robustness properties MH - France MH - Mexico|Nuevo Leon PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Acoustics;Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 1077-5463 UR - ISI:000180329100006 L2 - mechanical systems;dynamic backlash;impacts;non-smooth hybrid dynamics;underactuated system;viability conditions;RIGID BODIES; IMPACT-PAIR; SIMULATION; CHAOS; TRANSITION; CLEARANCE; MOTION SO - Journal of Vibration and Control 2003 ;9(1-2):119-155 8754 UI - 7388 AU - Mata R AU - Bye R AU - Linares E AU - Macias M AU - Rivero-Cruz I AU - Perez O AU - Timmermann BN AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Mexico City 04510, DF, MexicoUniv Arizona, Coll Pharm, Dept Pharmacol & Toxicol, Tucson, AZ 85721, USAMata, R, Univ Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, Mexico TI - Phytotoxic compounds from Flourensia cernua AB - Bioassay-directed fractionation of a CH2Cl2-MeOH (1:1) extract of the aerial parts of Flourensia cernua led to the isolation of three phytotoxic compounds, namely, dehydroflourensic acid (1), flourensadiol (2) and methyl orsellinate (3). Dehydroflourensic acid is a new natural product whose structure was established by spectral means. In addition, the known flavonoid ermanin and seven hitherto unknown gamma-lactones were obtained, these being tetracosan-4-olide, pentacosan-4-olide, hexacosan-4-olide, heptacosan-4-olide, octacosan-4-olide, nonacosan-4-olide, and triacontan-4-olide. Compounds 1-3 caused significant inhibition of radicle growth of Amaranthus hypochondriacus and Echinochloa crus-galli, interacted with bovine-brain calmodulin and inhibited the activation of the calmodulin-dependent enzyme cAMP phosphodiesterase. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000185373000027 L2 - Asteraceae;Flourensia cernua;Amaranthus hypochondriacus;dehydroflourensic acid;Echinochloa crusgalli;sesquiterpenoids;butanolides;calmodulin;cAMP phosphodiesterase;FUNGUS GUANOMYCES-POLYTHRIX; CONSTITUENTS; FLAVONOIDS SO - Phytochemistry 2003 ;64(1):285-291 8755 UI - 9063 AU - Mathew X AU - Thompson GW AU - Singh VP AU - McClure JC AU - Velumani S AU - Mathews NR AU - Sebastian PJ AD - UNAM, Ctr Invest Energia, Solar Hydrogen Fuel Cell Grp, Solar Mat Dept, Temixco 62580, Morelos, MexicoUniv Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506, USAUniv Kentucky, Dept Elect Engn, Lexington, KY 40506, USAUniv Texas, Dept Met & Mat Engn, El Paso, TX 79968, USAMathew, X, UNAM, Ctr Invest Energia, Solar Hydrogen Fuel Cell Grp, Solar Mat Dept, Temixco 62580, Morelos, Mexico TI - Development of CdTe thin films on flexible substrates - a review AB - In the recent years there has been an increased interest in photovoltaic structures on lightweight flexible substrates. Photovoltaic structures on lightweight substrates have several advantages over the heavy glass-based structures in both terrestrial and space applications. CdTe is one of the leading candidates for the solar cells due to its optimum band gap and the variety of film preparation methods. The development of CdTe thin films on flexible substrates is discussed. The film growth and characterization are reviewed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000181118900007 L2 - CdTe;thin film;flexible substrate;photovoltaic structure;CDS/CDTE SOLAR-CELL; CHLORINE-CONTAINING SOLUTIONS; GLYCOL-BASED BATH; ELECTRODEPOSITED CDTE; CADMIUM TELLURIDE; OPTICAL-PROPERTIES; STEEL FOIL; BAND-GAP; DEPOSITION; JUNCTIONS SO - Solar Energy Materials and Solar Cells 2003 ;76(3):293-303 8756 UI - 7422 AU - Matta CF AU - Hernandez-Trujillo J AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoMcMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaHernandez-Trujillo, J, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Bonding in polycyclic aromatic hydrocarbons in terms of the electron density and of electron delocalization AB - We show that the delocalization indices calculated within the framework of the quantum theory of atoms in molecules provide an excellent basis for the definition of a bond order in polycyclic aromatic hydrocarbons. We show that the two-electron information contained within the delocalization index can be estimated from the electron density at the bond critical point, a mapping that has no a priori reason to exist. The mapping between the bond order and the electron density at the bond critical point can be exploited to provide a fast estimate of bond orders from theoretical or experimental electron densities. Bond orders in these molecules are shown to be associated to other one-electron properties. We provide evidence to the strong coupling of the or and T contributions to the electron density at the bond critical point, a nonseparability by virtue of which the electron density at the bond critical point reflects both contributions. Another remarkable finding is that the delocalization indices between bonded carbon atoms are also strongly negatively correlated to the electronic energy density at the bond critical point, the latter being another example of a two electron property. In this manner, bond order is associated to a stabilizing effect quantified by the electronic energy density at the bond critical point. Because aromaticity is rooted in electron delocalization within a ring system, the delocalization index is used to define an aromaticity index that measures alternation in the delocalization of electrons within a ring of a polycyclic aromatic hydrocarbon. The proposed aromaticity index represents a "local aromaticity measure". We have analyzed in detail the effects of ring annealation on bond orders and on the aromatic character of a ring and explored its correlation with independent measures of aromaticity such as NICS and HOMA MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 36 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000185401700022 L2 - QUANTUM MOLECULAR SIMILARITY; X-RAY-SCATTERING; DOT-N BONDS; CRITICAL-POINT; HARTREE-FOCK; BCP SPACE; LOCALIZATION; INDEXES; CHARGE; DISTRIBUTIONS SO - Journal of Physical Chemistry A 2003 ;107(38):7496-7504 8757 UI - 8423 AU - Matta CF AU - Hernandez-Trujillo J AU - Tang TH AU - Bader RFW AD - McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaUniv Toronto, Dept Chem, Lash Miller Chem Labs, Toronto, ON M5S 3H6, CanadaUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoBader, RFW, McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada TI - Hydrogen-hydrogen bonding: A stabilizing interaction in molecules and crystals AB - Bond paths linking two bonded hydrogen atoms that bear identical or similar charges are found between the ortho-hydrogen atoms in planar biphenyl, between the hydrogen atoms bonded to the C1-C4 carbon atoms in phenanthrene and other angular polybenzenoids, and between the methyl hydrogen atoms in the cyclobutadiene, tetrahedrane and indacene molecules corseted with tertiary-tetra-butyl groups. It is shown that each such H-H interaction, rather than denoting the presence of "nonbonded steric repulsions", makes a stabilizing contribution of up to 10 kcal mol(-1) to the energy of the molecule in which it occurs. The quantum theory of atoms in molecules-the physics of an open system-demonstrates that while the approach of two bonded hydrogen atoms to a separation less than the sum of their van der Waals radii does result in an increase in the repulsive contributions to their energies, these changes are dominated by an increase in the magnitude of the attractive interaction of the protons with the electron density distribution, and the net result is a stabilizing change in the energy. The surface virial that determines the contribution to the total energy decrease resulting from the formation of the H-H interatomic surface is shown to account for the resulting stability. It is pointed out that H-H interactions must be ubiquitous, their stabilization energies contributing to the sublimation energies of hydrocarbon molecular crystals, as well as solid hydrogen. H-H bonding is shown to be distinct from "dihydrogen bonding", a form of hydrogen bonding with a hydridic hydrogen in the role of the base atom MH - Canada MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 99 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0947-6539 UR - ISI:000182922100005 L2 - bond path;density functional calculations;hydrogen bonds;hydrogen-hydrogen interaction;EXPERIMENTAL CHARGE-DENSITY; AB-INITIO CALCULATIONS; ELECTRON-DENSITY; TOPOLOGICAL PROPERTIES; BONDED INTERACTIONS; DIHYDROGEN BOND; AMINO-ACIDS; ATOMS; COMPLEXES; CYCLOBUTADIENE SO - Chemistry-A European Journal 2003 ;9(9):1940-1951 8758 UI - 7704 AU - Matus MH AU - Contreras R AU - Cedillo A AU - Galvan M AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Chile, Fac Ciencias, Dept Quim, Santiago, ChileMatus, MH, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, AP 55-534, Mexico City 09340, DF, Mexico TI - Wave function instabilities in the cis-trans isomerization and singlet-triplet energy gaps in a push-pull compound AB - The energy barriers for the cis-trans isomerization are obtained for a sample of push-pull compounds. The appropriate trend in the values for the barriers is obtained after an instability treatment of the restricted Kohn-Sham solution. At the instability zone, some compounds exhibit a singlet open-shell configuration. The width of the instability region around the transition state is characterized in an asymmetric push-pull compound. These results show that the instabilities in the twisted configuration of double bonds are mainly related to spin symmetry effects rather than to the molecular symmetry. For the open-shell singlet, an ensemble model is used to compute the electronic properties. The singlet-triplet energy gap along the rotation coordinate is qualitatively described by the use of spin potential and hardness. (C) 2003 American Institute of Physics MH - Chile MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000184675600002 L2 - NUCLEAR MAGNETIC RESONANCE; INTERNAL ROTATION; MOLECULES; ABSORPTION; KINETICS; SYMMETRY; OLEFINS SO - Journal of Chemical Physics 2003 ;119(8):4112-4116 8759 UI - 7863 AU - Mayen-Hernandez SA AU - Jimenez-Sandoval S AU - Castanedo-Perez R AU - Torres-Delgado G AU - Chao BS AU - Jimenez-Sandoval O AD - Inst Politecn Nacl, Ctr Invest & Estud Avanzados, Unidad Queretaro, Queretaro 76001, Qro, MexicoEnergy Convers Devices, Rochester, MI 48309, USAJimenez-Sandoval, S, Inst Politecn Nacl, Ctr Invest & Estud Avanzados, Unidad Queretaro, Apartado Postal 1-798, Queretaro 76001, Qro, Mexico TI - Preparation and characterization of polycrystalline MnS thin films by the RF-sputtering technique above room temperature AB - Polycrystalline MnS thin films have been obtained by the RF-sputtering technique above room temperature for the first. tithe. This could be achieved by adding appropriate amounts of elemental sulfur to the MnS targets, to compensate for the sulfur loss that normally produces off-stoichiometry, amorphous films. The films were prepared at ambient temperature, 120degreesC and 180degreesC, while the sulfur concentrations in the target were 0, 5 and 1.0 at%. The films were characterized. by X-ray diffraction, energy dispersive spectroscopy, atomic force microscopy, and UV-Vis spectroscopy. 10 at% was the concentration of additional sulfur at which polycrystalline films could be obtained at substrate temperatures of 120degreesC and 180degreesC. However, the addition of sulfur to the targets for growing films at room temperature leads to amorphicity (5 at%) or to a change in the crystal orientation of the films (10 at%). The experimental conditions to obtain single-phase films with the metastable hexagonal (gamma) structure, above room temperature, are reported. From UV-vis spectral data, a bandgap energy value of 3.3 eV was found for gamma-MnS films. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000184297600003 L2 - crystal structure;sputtering;sulfides;semiconducting materials;OCTAHEDRALLY COORDINATED MNS; GROWTH SO - Journal of Crystal Growth 2003 ;256(1-2):12-19 8760 UI - 9400 AU - Mazenc F AU - Mondie S AU - Niculescu SI AD - INRIA Lorraine, Projet CONGE, ISGMP, F-57045 Metz, FranceIPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoUTC, UMR CNRS, Heudiasyc, F-60205 Compiegne, FranceMazenc, F, INRIA Lorraine, Projet CONGE, ISGMP, Bat A, F-57045 Metz, France TI - Global asymptotic stabilization for chains of integrator with a delay in the input AB - The problem of the global uniform asymptotic stabilization by bounded feedback of a chain of integrators with a delay in the input is solved. No limitation on the size of the delay is imposed. To validate the approach, a third-order example is presented MH - France MH - Mexico|Distrito Federal PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 22 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000180424600005 L2 - bounded feedback;chain of integrators;time-delay systems;BOUNDED CONTROLS; SYSTEMS SO - Ieee Transactions on Automatic Control 2003 ;48(1):57-63 8761 UI - 8490 AU - McCarthy JT AU - Moran J AU - Posen G AU - Leypoldt JK AU - Hull AR AU - Jaber BL AU - Correa-Rotter R AD - Mayo Clin, Div Nephrol, Rochester, MN, USASatellite Healthcare, Redwood City, CA, USAUniv Ottawa, Ottawa Hosp, Div Nephrol, Ottawa, ON, CanadaUniv Utah, Dept Internal Med, Div Nephrol, Salt Lake City, UT 84112, USAUniv Utah, Dept Bioengn, Salt Lake City, UT 84112, USASalt Lake City VA Hlth Care Syst, Salt Lake City, UT, USAUniv Texas, SW Med Sch, Dallas, TX 75230, USARenal Management Inc, Dallas, TX, USATufts New England Med Ctr, Div Nephrol, Boston, MA, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Nephrol & Mineral Metab, Mexico City, DF, MexicoMcCarthy, JT, Mayo Clin & Mayo Fdn, Div Nephrol & Internal Med, 200 1st St SW, Rochester, MN 55905 USA TI - A time for rediscovery: Chronic hemofiltration for end-stage renal disease AB - Provision of maintenance renal replacement therapy (MRRT) is becoming increasingly challenging. The number of patients requiring MRRT is growing rapidly, while the number of nephrologists, nurses, and other staff available to provide therapy is not increasing at a similar rate. Patients are now older and have more comorbid conditions, which magnifies the complexity of their RRT and makes it increasingly difficult to maintain the quality of care within the limitations of constrained economic resources. The two most commonly used MRRTs are hemodialysis (HD) and peritoneal dialysis (PD). A third modality of MRRT, hemofiltration, is not currently in widespread use in North America. In hemofiltration, plasma is filtered through a highly permeable, biocompatible synthetic membrane and waste products are removed by convection and solvent drag as the filtrate moves across the membrane. Hemofiltration equipment constantly monitors the rate of plasma removal and administers a sterile, nonpyrogenic replacement solution at an appropriate rate to replace the waste-laden ultrafiltrate and avoid vdume depletion in the patient. Hemofiltration may offer some potential clinical advantages to the MRRT patient, including better hemodynamic and cardiovascular stability, enhanced removal of middle molecular weight toxins, increased comfort, and therapy preference. Some reports indicate possible reduced morbidity and mortality and reduced risk of bacterial contamination and inflammation as a result of the use of sterile, ultrapure replacement fluids. Chronic hemofiltration is a relatively simple MRRT option that may offer significant benefits for many patients who have end-stage renal disease (ESRD) and deserves closer consideration for these patients MH - Canada MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 7 U4 - Urology & Nephrology U5 - J;Editorial Material AV - English IS - 0894-0959 UR - ISI:000182784800005 L2 - ONLINE SUBSTITUTION FLUID; PREDILUTION HEMOFILTRATION; NOCTURNAL HEMODIALYSIS; CARDIOVASCULAR-RESPONSE; SARDINIAN MULTICENTER; HEMODYNAMIC-RESPONSE; TREATMENT MODALITIES; REPLACEMENT THERAPY; PERITONEAL-DIALYSIS; HOME HEMODIALYSIS SO - Seminars in Dialysis 2003 ;16(3):199-207 8762 UI - 6499 AU - McClung M AU - Miller P AU - Civitelli R AU - Warren M AU - Greenspan S AU - Haddock L AU - Tamayo J AU - Donley D AU - San Martin J AD - Eli Lilly & Co, Indianapolis, IN 46285, USACOMOP Osteoporosis Res Ctr, Mexico City, DF, MexicoUniv Puerto Rico, San Juan, PR 00936, USAUniv Pittsburgh, Med Ctr, Pittsburgh, PA, USAPhys E, Greenville, NC, USAWashington Univ, Sch Med, St Louis, MO, USAColorado Ctr Bone Res, Lakewood, CO, USAOregon Osteoporosis Ctr, Portland, OR, USA TI - Differential effects of teriparatide and alendronate on markers of bone remodeling and areal and volumetric bone density in women with osteoporosis MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000186080500152 SO - Journal of Bone and Mineral Research 2003 ;18():S40-S40 8763 UI - 7283 AU - McClung MR AU - Miller PD AU - Civitelli R AU - Warren ML AU - Greenspan SL AU - Tamayo JA AU - Donley DW AU - Agnusdei D AD - Oregon Osteoporosis Ctr, Portland, OR, USAColorado Ctr Bone Res, Lakewood, CO, USAWashington Univ, Sch Med, St Louis, MO, USAPhys E, Greenville, NC, USAUniv Pittsburgh, Med Ctr, Pittsburgh, PA, USACOMOP Osteoporosis Res Ctr, Mexico City, DF, MexicoEli Lilly & Co, Indianapolis, IN 46285, USA TI - Distinctive effects of teriparatide and alendronate on lumbar spine bone density and bone turnover in women with osteoporosis MH - Mexico|Distrito Federal MH - USA PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000184041600028 SO - Osteoporosis International 2003 ;14():S9-S10 8764 UI - 8472 AU - McKinley GA AU - Follows MJ AU - Marshall J AU - Fan SM AD - MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA, USAPrinceton Univ, Atmospher & Ocean Sci Program, Princeton, NJ 08544, USAMcKinley, GA, Inst Nacl Ecol, Perifer 5000,Piso 4, Mexico City 04530, DF, Mexico TI - Interannual variability of air-sea O-2 fluxes and the determination of CO2 sinks using atmospheric O-2/N-2 AB - Motivated by the use of atmospheric O-2/N-2 to determine CO2 sinks under the assumption of negligible interannual variability in air-sea O-2 fluxes, we examine interannual fluctuations of the global air-sea flux of O-2 during the period 1980-1998 using a global ocean circulation and biogeochemistry model along with an atmospheric transport model. It is found that both the El Nino/Southern Oscillation (ENSO) cycle and wintertime convection in the North Atlantic are primary drivers of global air-sea oxygen flux interannual variability. Model estimated extremes of O-2 flux variability are -70/+100 x 10 12 mol/yr (Tmol/yr), where positive fluxes are to the atmosphere. O-2/N-2 variability could cause an up to +/-1.0 PgC/yr error in estimates of interannual variability in land and ocean CO2 sinks derived from atmospheric O-2/N-2 observations MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 11 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000182893500001 L2 - NORTH-ATLANTIC; CARBON-CYCLE; OXYGEN; CIRCULATION; MODEL SO - Geophysical Research Letters 2003 ;30(3): 8765 UI - 8429 AU - McNamara JM AU - Houston AI AU - Barta Z AU - Osorno JL AD - Univ Bristol, Ctr Behav Biol, Bristol BS8 1TH, Avon, EnglandUniv Debrecen, Dept Evolut Zool, Debrecen, HungaryUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoHouston, AI, Univ Bristol, Ctr Behav Biol, Bristol BS8 1TH, Avon, England TI - Should young ever be better off with one parent than with two? AB - We analyze models of parental care, providing the first systematic comparison of the care given to young by one parent versus by two parents. In the Houston-Davies model of care, young always do better with two parents rather than with one parent. When one parent decides about its level of care before the other, then the young may do better with one parent when the costs of care for the parents are asymmetric. When the level of parental effort is reached by negotiation, there are cases in which young do better with one parent, even when costs are symmetric. The analysis suggests empirical ways to differentiate between different response rules MH - United Kingdom MH - Hungary MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 24 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 1045-2249 UR - ISI:000182957900001 L2 - game theory;mate removal;negotiation;parental effort;ORANGE-TUFTED SUNBIRD; REPRODUCTIVE SUCCESS; OFFSPRING DESERTION; SEX-DIFFERENCES; MATE REMOVAL; CARE; BEHAVIOR; BIRDS; EVOLUTIONARY; MANIPULATION SO - Behavioral Ecology 2003 ;14(3):301-310 8766 UI - 7619 AU - McQuirter JL AU - Rothenberg SJ AU - Dinkins GA AU - Kondrashov VS AU - Manalo M AU - Todd AC AD - Drew Univ, Los Angeles, CA, USANatl Publ Hlth Inst, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoMt Sinai Sch Med, New York, NY, USA TI - Elevated blood lead from gunshot up to one year after injury MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518500907 SO - Toxicological Sciences 2003 ;72():185-185 8767 UI - 8519 AU - McQuirter JL AU - Rothenberg SJ AU - Dinkins GA AU - Norris K AU - Kondrashov W AU - Manalo M AU - Todd AC AD - Charles R Drew Univ Med & Sci, Dept Oral & Maxillofacial Surg, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Anesthesia, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Drew Environm Res Ctr, Los Angeles, CA 90059, USANatl Publ Hlth Inst, Ctr Res Populat Hlth, Cuernavaca, Morelos, MexicoCharles R Drew Univ Med & Sci, Dept Surg, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Med, Los Angeles, CA 90059, USAMt Sinai Sch Med, Dept Community & Prevent Med, New York, NY, USAMcQuirter, JL, Charles R Drew Univ Med & Sci, Dept Oral & Maxillofacial Surg, 1731 E 120th St, Los Angeles, CA 90059 USA TI - Elevated blood lead resulting from maxillofacial gunshot injuries with lead ingestion AB - Purpose: The purpose of this study was to identify the contribution of ingested lead particles to elevated blood lead concentrations in victims of gunshot injury to the maxillofacial region. Patients and Methods: As part of a larger study of the effects of retained lead bullets on blood lead, a retrospective review of study findings was completed on 5 of 8 patients who sustained injuries to the maxillofacial region. These 5 patients were recruited into the larger study within 11 days of injury and showed a penetration path for the projectile that engaged the upper aerodigestive tract. All subjects were recruited from patients presenting for care of their gunshot injuries to a large inner-city trauma center with a retained bullet resulting from a gunshot injury. An initial blood lead level was measured for all recruited patients and repeated 1 to 17 weeks later. Medical history was taken along with a screening and risk factor questionnaire to determine other potential or actual sources (occupational/recreational) of lead exposure. Cd-109 K-shell x-ray fluorescence determinations of bone lead were completed to determine past lead exposure not revealed by medical history and risk factor questionnaire. Radiographs taken of the abdomen and chest, required as a part of the patient's hospital care, were retrospectively reviewed for signs of metallic fragments along the aerodigestive tract. Results: All 5 patients retained multiple lead pellets or fragments at the site of injury, sustained fractures of the facial bones, and showed increases in blood lead. Three of the 5 study subjects who sustained maxillofacial gunshot injuries involving the mouth, nose, or throat region showed metallic densities along the gastrointestinal tract indicative of ingested bullet fragments. Each patient with ingested bullet fragments showed rapid elevation of blood lead exceeding 25 mug/dL and sustained increases well beyond the time when all ingested fragments were eliminated. A 3-year follow-up on these 3 patients showed significantly sustained elevation of blood lead but less than that observed during the initial 6 months after injury. None of the 5 study subjects showed any evidence of metallic foreign bodies within the tracheobronchial regions indicative of aspiration. Conclusion: Ingestion of lead fragments can result from gunshot injuries to the maxillofacial region and may substantially contribute to a rapid increase in blood lead level. Prompt diagnosis and elimination of ingested lead fragments are essential steps necessary to prevent lead being absorbed from the gastrointestinal tract. Increased blood lead in victims after gunshot injuries must be fully evaluated for all potential sources, including recent environmental exposure, absorption of lead from any remaining bullets in body tissues, and the possibility of mobilization of lead from long-term body stores such as bone. (C) 2003 American Association of Oral and Maxillofacial Surgeons MH - USA MH - Mexico|Morelos PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 4 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0278-2391 UR - ISI:000182669800010 L2 - IN-VIVO MEASUREMENTS; BONE LEAD; OCCUPATIONAL EXPOSURE; ENVIRONMENTAL LEAD; HUMAN SKELETON; HUMAN TISSUES; CORD-BLOOD; MANAGEMENT; WOUNDS; FACE SO - Journal of Oral and Maxillofacial Surgery 2003 ;61(5):593-603 8768 UI - 6657 AU - Meaburn J AU - Bryce M AU - Harman DJ AU - Lopez JA AD - Univ Manchester, Dept Phys & Astron, Jodrell Bank Observat, Macclesfield SK11 9DL, Cheshire, England. UNAM, Astron Inst, Ensenada 22860, Baja California, Mexico TI - Ubiquitous high speed ejecta in PNe-MyCn-18 MH - United Kingdom MH - Mexico|Baja California T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400157 SO - 2003 ;(209):515-515 8769 UI - 8556 AU - Meade P AU - Hoover RS AU - Plata C AU - Vazquez N AU - Bobadilla NA AU - Gamba G AU - Hebert SC AD - Yale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06520, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoHebert, SC, Yale Univ, Sch Med, Dept Cellular & Mol Physiol, 333 Cedar St,SHM B147,POB 208026, New Haven, CT 06520 USA TI - cAMP-dependent activation of the renal-specific Na+-K+-2Cl(-) cotransporter is mediated by regulation of cotransporter trafficking AB - The murine apical bumetanide-sensitive Na+-K+-2Cl(-) cotransporter gene (mBSC1) exhibits two spliced isoform products that differ at the COOH-terminal domain. A long COOH-terminal isoform (L-mBSC1) encodes the Na+-K+-2Cl(-) cotransporter, and a short isoform (S-mBSC1) exerts a dominant-negative effect on L-mBSC1 cotransporter activity that is abrogated by cAMP. However, the mechanism of this dominant-negative effect was not clear. In this study, we used confocal microscopic analysis of an enhanced green fluorescent protein (EGFP) fusion construct (L-mBSC1-EGFP) expressed to characterize the surface expression of the L-BSC1 isoform in Xenopus laevis oocytes. Functional expression was also assessed in L-mBSC1-injected oocytes by measuring the bumetanide-sensitive Rb-86(+) uptake. Oocytes injected with L-mBSC1-EGFP cRNA developed a distinct plasma membrane-associated fluorescence that colocalized with the fluorescent membrane dye FM 4-64. The fluorescence intensity in L-mBSC1-EGFP oocytes did not change after cAMP was added to the extracellular medium. In contrast, L-mBSC1-EGFP fluorescence intensity was reduced in a dose-dependent manner, with coexpression of S-mBSC1. The inhibitory effect of S-mBSC1 was abrogated by cAMP. Finally, the exocytosis inhibitor colchicine blocked the effect of cAMP on the L-mBSC1-EGFP/S-mBSC1-coinjected oocytes. All changes in L-mBSC1 surface expression correlated with modification of bumetanide-sensitive Rb-86(+) uptake. Our data suggest that the dominant-negative effect of S-mBSC1 on L-mBSC1 transport function is due to the effects of the cotransporter on trafficking MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000182700200003 L2 - kidney;thick ascending limb;Xenopus laevis;oocytes;green fluorescent protein;NKCC2;THICK ASCENDING LIMBS; DOMINANT-NEGATIVE ISOFORM; BARTTERS-SYNDROME; NACL TRANSPORT; NA-K-2CL COTRANSPORTER; MEMBRANE EXPRESSION; EXCHANGER NHE3; K+ CHANNEL; MUTATIONS; PROTEIN SO - American Journal of Physiology-Renal Physiology 2003 ;284(6):F1145-F1154 8770 UI - 7497 AU - Medeiros M AU - Sharma VK AU - Ding R AU - Yamaji K AU - Li B AU - Muthukumar T AU - Valderde-Rosas S AU - Hernandez AM AU - Munoz R AU - Suthanthiran M AD - Cornell Univ, Weill Med Coll, New York, NY, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoSuthanthiran, M, 525 E 68th St,Box 3, New York, NY 10021, USA TI - Optimization of RNA yield, purity and mRNA copy number by treatment of urine cell pellets with RNAlater AB - Background: We have shown that measurement of mRNA for cytotoxic attack proteins perform and granzyme B in urinary cells is a noninvasive means of diagnosing acute rejection of human renal allografts. Urinary cell mRNA studies have yielded useful information in other patient populations such as patients with cancer. The isolation of sufficient and high quality ribonucleic acid (RNA) from urinary cells however is problematic. RNAlater, an RNA stabilization solution, has been reported to optimize RNA isolation from tumor tissues stored at room temperature and from pigment-rich ocular tissues. Methods: We explored whether the addition of RNAlater to urine cell pellets improves RNA yield, enhances purity and facilitates measurement of low abundance mRNAs. We measured, with the use of real-time quantitative polymerase chain reaction (PCR) assay, levels of expression of a constitutively expressed gene 18S rRNA and mRNA for granzyme B and transforming growth factor-beta(1) (TGF-beta(1)) in urine specimens and renal biopsies obtained from renal allograft recipients. Results: RNA yield (P<0.01, Wilcoxon signed rank test) and the A260/A280 ratio (P<0.01) were both higher with urine cell pellets treated with RNAlater prior to snap freezing compared to cell pellets that were not treated with RNAlater prior to snap freezing. Levels (copy number per 1 mug of total RNA) of 18S rRNA (P<0.02), granzyme B mRNA (P= 0.002) and TGF-beta(1) (P= 0.02) were all higher with treated urine cell pellets compared to untreated cell pellets. Kruskall-Wallis one way analysis of variance and pair-wise comparisons with Student-Newman-Keuls test showed that the levels of mRNA for granzyme B (P<0.05) and TGF-beta(1) (P<0.05) are significantly different between renal allograft biopsies and untreated urine cell pellets but not between the biopsy specimens and RNAlater-treated urine cell pellets. Conclusions: The addition of RNAlater to urine cell pellets improves RNA isolation from urinary cells and facilitates measurement of low abundance mRNAs. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Biochemical Research Methods;Immunology U5 - J;Article AV - English IS - 0022-1759 UR - ISI:000185381300012 L2 - urine PCR;real time quantitative PCR;transplantation;RNAlater;NONINVASIVE DIAGNOSIS; BLADDER-CANCER; GRANZYME-B; URINALYSIS; EXPRESSION; REJECTION; SEDIMENT; PERFORIN; UROSCOPY; SUBUNIT SO - Journal of Immunological Methods 2003 ;279(1-2):135-142 8771 UI - 8977 AU - Medellin-Rodriguez FJ AU - Hsiao BS AU - Chu B AU - Fu BX AD - SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794, USAUASLP, CIEP, FCQ, San Luis Potosi 78210, MexicoMedellin-Rodriguez, FJ, SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA TI - Uniaxial deformation of nylon 6-clay nanocomposites by in-situ synchrotron x-ray measurements AB - An in-situ uniaxial deformation study of nylon 6-clay hybrid (NCH) nanocomposites was carried out using simultaneous wide-angle x-ray diffraction (WAXD) and small-angle x-ray scattering (SAXS) techniques with synchrotron radiation. This nanocomposite system exhibited the partial exfoliated clay morphology. The WAXD patterns along the through-and edge-views from the as-pressed film samples indicated that both clay platelets and nylon 6 crystallites were parallel to the film plane but oriented randomly in the plane. During uniaxial deformation, the orientation of the molecular axis in the crystals increased with strain but decreased with the clay content. This behavior could be attributed to the rotation of clay platelets during deformation, which hindered the orientation of nylon 6 crystals. The corresponding tensile mechanical properties indicated that the elongation at break decreased and the tensile modulus and strength increased with the clay concentration, which has been observed before MH - USA MH - Mexico|San Luis Potosi PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0022-2348 UR - ISI:000181454100011 L2 - NYLON-6-CLAY HYBRID; MELTING BEHAVIOR; CRYSTALLIZATION SO - Journal of Macromolecular Science-Physics 2003 ;B42(1):201-214 8772 UI - 7244 AU - Mediavilla-Sahagun A AU - ApSimon HM AD - Univ London Imperial Coll Sci Technol & Med, EMMA Grp, TH Huxley Sch, London SW7 2BP, EnglandInst Mexicano Petr, PIMAS Grp, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, MexicoMediavilla-Sahagun, A, Univ London Imperial Coll Sci Technol & Med, EMMA Grp, TH Huxley Sch, RSM Bldg, London SW7 2BP, England TI - Urban scale integrated assessment of options to reduce PM10 in London towards attainment of air quality objectives AB - Epidemiological studies have indicated that the fine fraction of airborne particulate matter (PM10) is harmful to human health. In order to explore what can be done to attain air quality objectives (AQO) in the London metropolitan area it is necessary to analyse and compare a range of options for reducing emissions from different environmental and economic perspectives. The dominant sources of PM10 in the urban environment today are from traffic; hence abatement strategies must include reduction of traffic emissions. The USIAM model has been developed and used to examine and rank a large number of different kinds of road source emission reduction strategies, and explore their resulting projected concentrations for 2005. Such analysis can aid in deciding which strategy is most cost efficient from both the perspective of attaining present and future AQOs, and of reducing population exposure to harmful PM10 concentrations. The model base case scenario for 1996 has been compared with measured PM10 concentrations in locations throughout the area of study, resulting in error estimates well within the typical +/-10% to 50% error often quoted for this kind of air dispersion modelling. This work indicates that the most cost effective strategies from both perspectives analysed are those involving the use of alternative fuels, particularly switching diesel vehicles to LPG and/or CNG. The model also implies that measures involving road user charging appear to be less effective. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000185941500006 L2 - air quality management;emission reduction strategies;particulate;urban;dispersion modelling;POLLUTION; EUROPE; MODEL SO - Atmospheric Environment 2003 ;37(33):4651-4665 8773 UI - 9496 AU - Medina-Boudri A AU - Cornejo DR AU - Ayala O AU - Bertorello HR AU - Matutes-Aquino J AD - CIMAV, Complejo Ind Chihuahua, Mexico City 31109, DF, MexicoNatl Univ Cordoba, FAMAF, RA-5000 Cordoba, ArgentinaCornejo, DR, Univ Fed Pernambuco, Dept Fis, Cidade Univ, BR-50670901 Recife, PE, Brazil TI - Reversible processes in magnetization reversal of co-precipitated cobalt ferrite AB - A study of the magnetization reversal process in a co-precipitated cobalt ferrite material at 300 K was carried out. The evolution of the reversible M-rev and irreversible M-irr magnetization components were determined by measuring sets of recoil curves from different points on the initial magnetization curve and demagnetization curve. From these data, M-rev(M-irr)(Hi) curves were built, being H-i the internal field of the sample. The interrelation function eta = (M-rev/M-irr)(Hi) was determined as well. The results suggest that domain wall movement subject to pinning is the dominant mechanism for the reversal magnetization process in this material. (C) 2002 Elsevier Science B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000180075600068 L2 - cobalt ferrite;magnetization reversal;reversible and irreversible magnetization;IRREVERSIBLE MAGNETIZATION SO - Journal of Magnetism and Magnetic Materials 2003 ;254():219-221 8774 UI - 9017 AU - Medina-Franco H AU - Ramos-de la Medina A AU - Cortes-Gonzalez R AU - Baquera J AU - ngeles-Angeles A AU - Urist MM AU - Eltoum IE AU - Heslin MJ AD - Natl Inst Med Sci & Nutr Salvador Zubiran, Dept Surg, Mexico City 14000, DF, MexicoNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Pathol, Mexico City 14000, DF, MexicoUniv Alabama, Sect Surg Oncol, Birmingham, AL, USAUniv Alabama, Dept Surg Pathol, Birmingham, AL, USAUniv Alabama, Div Gen Surg, Birmingham, AL, USAMedina-Franco, H, Natl Inst Med Sci & Nutr Salvador Zubiran, Dept Surg, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Expression of p53 and proliferation index as prognostic factors in gastrointestinal sarcomas AB - Background: Sarcomas arising in the gastrointestinal (GI) tract are rare tumors. Molecular markers could be associated with prognosis in these types of tumors. Methods: We performed a retrospective analysis of adult patients with sarcomas arising in the GI tract at the National Institute of Medical Sciences in Mexico City and the University of Alabama at Birmingham Hospital. All histological types were included. Patient, tumor, and treatment factors were analyzed, with overall survival as the main outcome variable. Expression of p53 and cellular proliferation antigen Ki-67 was also analyzed. Statistical analysis was performed by log-rank test and Cox regression. Significance was defined as P < .05. Results: Forty-seven patients were analyzed. The median patient age was 53 years (range, 16-82 years). Twenty-five patients (53%) were women. The stomach was the most common site of presentation. The mean tumor size was 14 cm (2-45 cm). A complete resection was achieved in 40 patients. With a median follow-up of 30 months, the actuarial 3-year survival was 68%. Univariate analysis identified overexpression of p53 and Ki-67, high tumor grade, tumor size > 10 cm, and incomplete resection as significant negative prognostic factors. Hispanic race and good performance status were significantly associated with prolonged survival. On multivariate analysis, overexpression of p53 was the only independent negative prognostic factor. Conclusions: Overexpression of p53 is the strongest predictor of poor prognosis in patients with sarcomas of the GI tract MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 5 U4 - Oncology;Surgery U5 - J;Article AV - English IS - 1068-9265 UR - ISI:000181436100018 L2 - gastrointestinal sarcoma;p53;proliferation index;prognostic factors;SOFT-TISSUE SARCOMAS; BREAST-CANCER PROGNOSIS; STROMAL TUMORS; SURVIVAL; KI-67; ABNORMALITIES; METASTASIS; RECURRENCE; MDM2 SO - Annals of Surgical Oncology 2003 ;10(2):190-195 8775 UI - 8225 AU - Medina G AU - Casaos D AU - Jara LJ AU - Vera-Lastra O AU - Fuentes M AU - Barile L AU - Salas M AD - IMSS, Ctr Med Raza, Hosp Especialidades, Clin Res Unit, Mexico City 02990, DF, MexicoHosp Gen 76, Dept Internal Med, Mexico City, DF, MexicoCtr Med Raza, Hosp Especialidades, Imagenol Dept, Mexico City, DF, MexicoCtr Med Raza, Hosp Especialidades, Dept Internal Med, Mexico City, DF, MexicoCtr Med Raza, Hosp Especialidades, Dept Rheumatol, Mexico City, DF, MexicoCaro Res Inst, Concord, MA, USAJara, LJ, IMSS, Ctr Med Raza, Hosp Especialidades, Clin Res Unit, Seris & Zaachila S-N,Colonia Raza, Mexico City 02990, DF, Mexico TI - Increased carotid artery intima-media thickness may be associated with stroke in primary antiphospholipid syndrome AB - Objective: To investigate the prevalence and clinical significance of carotid artery intima-media thickness (IMT) in patients with primary antiphospholipid syndrome (APS). Methods: 28 patients with primary APS with at least a five year follow up, and 28 healthy subjects, matched by age and sex, were included in the study. Colour Doppler with high resolution B mode carotid ultrasonography and spectral analysis were performed in patients and controls. Information on cardiovascular risk factors and the clinical course were collected. Results: The mean (SD) age of patients and controls (12 male, 16 female in each group) was 40 (8.5) years; the mean (SD) disease duration 7.7 (3) years. Carotid artery IMT was found in 23/28 patients (2.6 (1.14) mm) and 7/28 controls (1.2 (0.44)) (p = 0.0001). A decrease in the lumen diameter was also found in 11/28 patients with primary APS without carotid atherosclerotic plaque, and 2/28 controls (p = 0.004). Hyperlipidaemia, diabetes, smoking, obesity, and hypertension were not associated with carotid artery IMT. Patients with carotid artery IMT had arterial vascular disease more often than patients without: 9/23 v 0/5 (p < 0.009). These patients had stroke (seven patients), myocardial infarction (one), and mesenteric thrombosis (one). Subjects with IMT had a threefold higher risk for stroke than those without IMT (95% CI 0.78 to 14.3). Conclusions: Patients with primary APS have a high prevalence of carotid artery IMT and a decreased lumen diameter. IMT in primary APS may be associated with stroke. Patients with primary APS with IMT must be considered as carriers of atherosclerosis MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 29 U4 - Rheumatology U5 - J;Article AV - English IS - 0003-4967 UR - ISI:000183545000004 L2 - SYSTEMIC-LUPUS-ERYTHEMATOSUS; CARDIOVASCULAR RISK-FACTORS; ATHEROSCLEROSIS; ANTIBODIES; ULTRASOUND; PREVALENCE; ATHEROMA; DISEASE SO - Annals of the Rheumatic Diseases 2003 ;62(7):607-610 8776 UI - 6278 AU - Medina J AU - O'Connor D AD - Dublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, IrelandCINVESTAV, Dept Fis, Mexico City 0730, DF, MexicoMedina, J, Dublin Inst Adv Studies, Sch Theoret Phys, 10 Burlington Rd, Dublin 4, Ireland TI - Scalar field theory on fuzzy S-4 AB - Scalar fields are studied on fuzzy S-4 and a solution is found for the elimination of the unwanted degrees of freedom that occur in the model. The resulting theory can be interpreted as a Kaluza-Klein reduction of CP3 to S-4 in the fuzzy context MH - Ireland MH - Mexico|Distrito Federal PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 11 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000188765300051 L2 - non-commutative geometry;matrix models;NONCOMMUTATIVE GEOMETRY; STAR-PRODUCTS; PHYSICS; SPHERE; SPACES; MODEL SO - Journal of High Energy Physics 2003 ;(11): 8777 UI - 6122 AU - Medrano F AU - Calderon A AU - Yatsimirsky AK AD - Univ Sonora, Dept Invest Polimeros & Mat, Phuket 83000, ThailandUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Phosphodiesterolytic activity of La(III) hydroxide complexes stabilized by glycine derivatives MH - Mexico|Distrito Federal MH - Thailand PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187062403631 SO - Abstracts of Papers of the American Chemical Society 2003 ;226():U754-U754 8778 UI - 7280 AU - Meissner HC AU - Townsend T AU - Wenman W AU - Kaplan SL AU - Morfin MR AU - Edge-Padbury B AU - Naberhuis-Stehouwer S AU - Bruss JB AD - Tufts Univ, Sch Med, New England Med Ctr, NEMCH, Boston, MA 02111, USAJohns Hopkins Univ, Sch Med, Baltimore, MD 21218, USAUniv Calif Davis, Sch Med, Sacramento, CA 95817, USATexas Childrens Hosp, Houston, TX 77030, USABaylor Coll Med, Houston, TX 77030, USAHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoPharmacia Corp, Kalamazoo, MI, USAMeissner, HC, Tufts Univ, Sch Med, New England Med Ctr, NEMCH, 750 Washington St,Box 321, Boston, MA 02111 USA TI - Hematologic effects of linezolid in young children AB - Background. Linezolid is an effective and well-tolerated antibiotic for the treatment of Gram-positive infections, including hospital and community-acquired pneumonia and complicated and uncomplicated skin and skin structure infections. In adults linezolid treatment for greater than or equal to2 weeks has been associated with reversible hematopoietic suppression, primarily thrombocytopenia. Objective. To evaluate the occurrence of hematologic effects in children with Gram-positive infections in an open label study of linezolid vs. vancomycin. Methods. Detailed analyses of hematologic data, including reported hematologic adverse events, complete blood counts, reticulocyte index (111) and iron studies (serum iron and transferrin saturation), were conducted in both groups at baseline and during and after treatment with the use of an intent-to-treat analysis. Results. Three hundred sixteen patients (median age, 1.65 yr) randomized 2:1 to linezolid (n = 215) or vancomycin (n = 101) were treated. Total treatment durations were similar in the vancomycin group (12.2 +/- 6.4 days; median, 11.0 days) and the linezolid group (11.3 +/- 5.0 days; median, 11.0 days) (P = 0.20). No significant differences were noted in drug-related hematologic events, such as thrombocytopenia (linezolid, 1.9% vs. vancomycin, 0%; P = 0.170), anemia (linezolid, 1.4% vs. vancomycin, 1.0%; P = 0.771) or neutropenia (linezolid, 0% vs. vancomycin, 0%). Hemo-globin values also were similar between treatment groups when assessed by shifts from baseline to lowest recorded value. Frequency of occurrence of any substantially abnormal value for hemoglobin (15.7% vs. 12.4%), platelets (12.9% vs. 13.4%) and neutrophils (5.9% vs. 4.3%) were similar in the linezolid and vancomycin groups. No clinically relevant changes in RI or iron studies were noted between treatment groups, and parallel increases in RI occurred with both linezolid and vancomycin. Conclusions. No significant differences in hematologic profiles between linezolid and vancomycin occurred in this pediatric population MH - USA MH - Mexico|Jalisco PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000185805300007 L2 - linezolid;hematologic effects;tolerability;children;BONE-MARROW INJURY; INDUCED THROMBOCYTOPENIA; VANCOMYCIN; CHLORAMPHENICOL; INFECTIONS; ANEMIA; METABOLITES SO - Pediatric Infectious Disease Journal 2003 ;22(9):S184-S192 8779 UI - 7431 AU - Mejia-Alvarez P AU - Melhem R AU - Mosse D AU - Aydin H AD - IPN, CINVESTAV, Secc Computac, Mexico City 07738, DF, MexicoUniv Pittsburgh, Dept Comp Sci, Pittsburgh, PA 15260, USAGeorge Mason Univ, Dept Comp Sci, Fairfax, VA 22030, USAMejia-Alvarez, P, IPN, CINVESTAV, Secc Computac, Av IPN 2508, Mexico City 07738, DF, Mexico TI - An incremental server for scheduling overloaded real-time systems AB - The need for supporting dynamic real-time environments where changes in workloads occur frequently requires a scheduling framework that: 1) explicitly addresses overload conditions, 2) allows the system to achieve graceful degradation while guaranteeing the deadlines of the most critical tasks in the system, and 3) supports an efficient runtime selection mechanism capable of determining the load to be shed from the system to handle the overload. In this paper, we propose a novel scheduling framework for a real-time environment that experiences dynamic workload changes. This framework is capable of adjusting the system workload in incremental steps under overloaded conditions such that the most critical tasks in the system are always scheduled and the total value of the system is maximized. Each task has an assigned criticality value and consists of two parts, a mandatory part and an optional part. A timely answer is available after the mandatory part completes execution and its value may be improved by executing the entire optional part. The process of selecting tasks (mandatory or optional parts) to discard while maximizing the value of the system requires the exploration of a potentially large number of combinations. Since an optimal solution is too time-consuming to be computed online, an approximate algorithm is executed incrementally whenever the processor would otherwise be idle, progressively refining the quality of the solution. This scheme allows the scheduler to handle overloads with low cost while maximizing the use of the available resources and without jeopardizing the temporal constraints of the most critical tasks in the system. Simulation results show that few stages of the algorithm need to be executed for achieving a performance with near-optimal results MH - Mexico|Distrito Federal MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9340 UR - ISI:000185519500010 L2 - real-time systems scheduling;incremental processing;approximate algorithms;TASKS SO - Ieee Transactions on Computers 2003 ;52(10):1347-1361 8780 UI - 8463 AU - Mejia-Ortiz LM AU - Hartnoll RG AU - Viccon-Pale JA AD - UAM X, Dept El Hombre & Su Ambiente, Lab Fisiol & Comportamiento Anim, Mexico City 04960, DF, MexicoUniv Liverpool, Port Erin Marine Lab, Port Erin IM9 6JA, Man, EnglandMejia-Ortiz, LM, UAM X, Dept El Hombre & Su Ambiente, Lab Fisiol & Comportamiento Anim, Calzada Hueso 1100,Colonia VIlla Quietud, Mexico City 04960, DF, Mexico TI - A new stygobitic crayfish from Mexico, Procambarus cavernicola (Decapoda : Cambaridae), with a review of cave-dwelling crayfishes in Mexico AB - Procambarus (Austrocambarus) cavernicola, a new species of stygobitic crayfish known only from Gabriel Cave, Oaxaca, Mexico, is described. The new species is characterised by a body that lacks pigmentation, except for small purple spots on the eyes; with small setae on the tip of the eye; elongated chelipeds, with the surface of chela covered with small tufts of short setae; first pleopod of form I male with mesial process elongated and conical, triangular central projection, reduced cephalic process and cephalic shoulder forming convex border; annulus ventralis with preannular plate covered with short setae, postannuluar plate oval-shaped, with blunt tubercles. The new species is morphologically similar to other stygobite members of the subgenus Austrocambarus from the Oaxaca-Veracruz area, whose relationships are discussed. The distributions and levels of adaptation to the subterranean environment of 16 cave-inhabiting taxa of Procambarus in Mexico are reviewed MH - United Kingdom MH - Mexico|Distrito Federal PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000182931500016 L2 - CRUSTACEA; VERACRUZ SO - Journal of Crustacean Biology 2003 ;23(2):391-401 8781 UI - 8639 AU - Mejia-Saules T AU - Bisby FA AD - Inst Ecol AC, Xalapa 91070, Veracruz, MexicoUniv Reading, Sch Plant Sci, Ctr Plant Divers & Systemat, Reading RG6 6AS, Berks, EnglandMejia-Saules, T, Inst Ecol AC, Km 2-5 Antigua Carretera Coatepec 351,Congreg, Xalapa 91070, Veracruz, Mexico TI - Silica bodies and hooked papillae in lemmas of Melica species (Gramineae : Pooideae) AB - Melica (sensu lato) is a genus with approximately 80 species distributed in the temperate regions of both hemispheres. The genus has been better studied morphologically than anatomically, but morphological patterns have led to conflicting subdivisions either into sections, or by segregation of the genus Bromelica. The lemma epidermis is examined here under scanning electron microscopy (SEM) for 40 species of Melica to-see if it exhibits characters of systematic significance. Silica bodies and hooked papillae are reported in the lemma for the first time in the genus. Patterns of variation are evident within four structures that terminate in points: prickles, hooks, hooked papillae and macro-hairs. Fourteen qualitative characters for lemma epidermis are used in phenetic analyses. The presence or absence of macro-hairs conflicts with some other patterns, but gives some support to the classification of Papp. Characters associated with the split of the clusters were micro-hairs (straight and geniculate) and the distribution and frequency of prickles in both costal and intercostal zones. As a conclusion, Melica is not a coherent taxonomic grouping and a simple segregation of Bromelica from Melica genus is rejected. (C) 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 141, 447-463 MH - United Kingdom MH - Mexico|Veracruz PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000182419500003 L2 - anatomy;Bromelica;grasses;hooks;macro-hairs;Meliceae;micropapillae;phenetic analyses;Poaceae;prickles;EPIDERMAL CHARACTERISTICS; LEAF EPIDERMIS; FEATURES; POACEAE SO - Botanical Journal of the Linnean Society 2003 ;141(4):447-463 8782 UI - 518 AU - Mejia A AU - Cantwell M AD - Univ Sonora, Sch Agr, Hermosillo, Sonora, MexicoUniv Calif Davis, Dept Vegetable Crops, Davis, CA 95616, USAMejia, A, Univ Sonora, Sch Agr, Hermosillo, Sonora, Mexico TI - Prickly pear fruit development and quality in relation to gibberellic acid applications to intact and emasculated flower buds AB - The fruit of the prickly pear cactus ("Tuna blanca", Opuntia amyclaea) has a sweet julcy pulp containing numerous hard-coated seeds, which limit the overall acceptability of the fruit. This study extended previous attempts to develop prickly pear fruits with reduced or smaller seed structures by applying gibberellic acid to floral buds. Solutions of gibberellic acid (GA(3)) were applied by spraying (100 and 500 ppm) or by injection (10 and 100 ppm) to intact or emasculated floral buds at three stages of development, and twice subsequently to the developing fruits. The GA treatments did not significantly affect fruit development when applied to intact floral buds, but reduced seed size when applied by injection. None of the treatments to emasculated buds resulted in fruit size or pulp development equal to that of the control fruits from intact floral buds. Spray application of 100 ppm GA to emasculated buds was the only treatment in which there was no hard seed coat development, but fruit size and percentage pulp were low as well. The other GA treatments were more effective in inducing pulp development but also resulted in the development of hardened seed coats (abortive seeds). These results further illustrate the dual role of the funiculus in the development of the pulp and seed coats in prickly pear fruits. The soluble solids contents of fruit pulp from intact and emasculated GA-treated buds were similar, but titratable acidity values were lower in the fruits from emasculated buds. GA treatments also tended to result in reduced peel firmness MH - Mexico|Sonora MH - USA PB - DALLAS: PROFESSIONAL ASSOC CACTUS DEVELOPMENT RP - NOT IN FILE U3 - TC 0 U4 - Horticulture U5 - J;Article AV - English UR - ISI:000233480900007 SO - Journal of the Professional Association for Cactus Development 2003 ;5():72-85 8783 UI - 9586 AU - Mejia C AU - Navarro S AU - Pellin A AU - Ruiz A AU - Castel V AU - Llombart-Bosch A AD - Univ Nacl Autonoma Mexico, Inst Cell Physiol, Dept Neurosci, Mexico City 04510, DF, MexicoUniv Valencia, Sch Med, Dept Pathol, Valencia 46010, SpainHosp La Fe, Pediat Oncol Unit, E-46009 Valencia, SpainMejia, C, Univ Nacl Autonoma Mexico, Inst Cell Physiol, Dept Neurosci, Mexico City 04510, DF, Mexico TI - Prognostic significance of cell proliferation in human neuroblastoma: Comparison with other prognostic factors AB - Peripheral neuroblastic tumors (PNT), are heterogeneous neoplasms that include neuroblastoma (NB), ganglio-neuroblastoma (GNB) and ganglioneuroma (GN) and present great biological heterogeneity. There are few reports analyzing PCNA and Ki-67 expression in PNT; however, controversy exists concerning the specificity of PCNA as a real proliferative marker. The objective of our study was to determine which of these cellular proliferation markers is more specific on cellular cycle and could contribute with more information on the cell cycle. We found that PCNA was expressed in NB unfavourable cases, with MYCN amplification and high mitosis-karyorrhexis-index (MKI). Whereas, Ki-67 showed statistical significance regarding cases unfavourable with intermediate and high MKI, aneuploid and stages 3 and 4. Survival showed that patients with tumor not expressing Ki-67 (MIBI) lived longer than those without PCNA (88.93 vs 74.05%). We conclude that Ki-67 expression permits reliable detection of the cellular proliferation neuroblastoma fraction and provides useful prognostic information when associated with other biological factors MH - Mexico|Distrito Federal MH - Spain PB - ATHENS: PROFESSOR D A SPANDIDOS RP - NOT IN FILE U3 - TC 1 U4 - Oncology U5 - J;Article AV - English IS - 1021-335X UR - ISI:000179822800042 L2 - NUCLEAR ANTIGEN; NEURO-BLASTOMA; EXPRESSION; CLASSIFICATION; SECTIONS; RECEPTOR; PROTEIN; MYCN; DNA SO - Oncology Reports 2003 ;10(1):243-247 8784 UI - 8093 AU - Mejia I AU - Benito JA AU - Jorba J AU - Roca A AD - Univ Michoacana San Nicolas Hidalgo, Inst Invest Met, Morelia 58060, Michoacan, MexicoUniv Politecn Catalunya, EUETIB, Dept Ciencia Mat & Engn Met, Barcelona 08036, SpainUniv Barcelona, Fac Quim, Dept Engn Quim & Met, E-08028 Barcelona, SpainMejia, I, Univ Michoacana San Nicolas Hidalgo, Inst Invest Met, Edif U Ciudad Univ, Morelia 58060, Michoacan, Mexico TI - Textures development in cold-worked ferrite-pearlite steels by drawing to moderate reductions AB - The authors present textures of 0.18 and 0.43% C steels developed during a single pass through different dies by drawing to a maximum of 23.9% and 27.6% reduction in diameter, respectively. The orientation density function (ODF) were estimated from pole figures (X-ray diffraction) for different drawing levels at (1)/(2) diameter. For both steels, the ODF show a low level texture even for the highest deformation levels. The 0.18% C steel exhibits higher crystal orientation than the 0.43% C steel. The study of the crystal orientation density, f(g), reveals an increase of the density values for the components with <110> parallel to the drawing direction. The calculated volume fraction of each texture component, Fv, indicates an increase of the alpha-fibre, while gamma-fibre remains constant and epsilon-fibre tends to decrease. The analysis of texture evolution with the highest f(g) in the ODF obtained at the surface and at the (1)/(2) diameter in 0.18% C steel with the maximum drawing level indicates meaningful changes in intensity and also in the peaks localization, due to the presence of an inhomogeneous texture produced by plastic anisotropy across depth level of the drawn profile MH - Mexico|Michoacan MH - Spain PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000183626400590 L2 - texture;orientation density function (ODF);crystal orientation density;volume fraction element;cold-drawing;ferrite-pearlite steels;POLYCRYSTALLINE MATERIALS; ORIENTATION SO - Thermec'2003, Pts 1-5 2003 ;426-4():3661-3666 8785 UI - 7990 AU - Mejia LM AU - Alvarez F AU - Hartnoll RG AD - Univ Autonoma Metropolitana Xochimilco, Lab Fis & Comportamiento Anim, Dept Hombre Ambiente, Mexico City 04960, DF, MexicoUniv Nacl Autonoma Mexico, Colecc Nacl Crustaceos, Inst Biol, Mexico City 04510, DF, MexicoUniv Liverpool, Port Erin Marine Lab, Sch Biol Sci, Port Erin IM9 6JA, Man, EnglandMejia, LM, Univ Autonoma Metropolitana Xochimilco, Lab Fis & Comportamiento Anim, Dept Hombre Ambiente, Calzada Hueso 1100,Col Villa Quietud, Mexico City 04960, DF, Mexico TI - A new species of freshwater prawn, Macrobrachium totonacum (Decapoda, Palaemonidae), with abbreviated development from Mexico AB - A new species of the genus Macrobrachium from northern Oaxaca, Mexico, with abbreviated larval development, is described. Macrobrachium totonacum new species, is similar to M. tuxtlaense and M. vicconi in exhibiting abbreviated larval development, but differs from these in the length of the first pereiopod and relative proportions of the articles of the second pereiopod. Macrobrachium totonacum occurs in the San Antonio River, which originates in the Cueva del Nacimiento del Rio San Antonio where the troglobyte M. villalobosi is found. However, both species differ in pigmentation. the number of rostral spines, proportions of the scaphocerite, relative proportions of the carpus and propodus of the first pereiopod, and the carpus, merus, and propodus of the second pereiopod MH - United Kingdom MH - Mexico|Distrito Federal PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000184003200007 L2 - LARVAL DEVELOPMENT; CRUSTACEA SO - Crustaceana 2003 ;76():77-86 8786 UI - 7680 AU - Mejia P AU - Levner E AU - Mosse D AD - CINVESTAV, IPN, Secc Computac, Mexico City 14000, DF, MexicoHolon Acad Inst Technol, Dept Comp Sci, IL-58102 Holon, IsraelUniv Pittsburgh, Dept Comp Sci, Pittsburgh, PA 15260, USAMejia, P, CINVESTAV, IPN, Secc Computac, Av IPN 2508, Mexico City 14000, DF, Mexico TI - An integrated heuristic approach to power-aware real-time scheduling AB - In this paper we propose a novel scheduling framework for a dynamic real-time environment that experiences power consumption constraints. This framework is capable of dynamically adjusting the voltage/speed of the system, such that no task in the system misses its deadline and the total energy savings of the system are maximized. Each task in the system consumes a certain amount of energy, which depends on a speed chosen for execution. The process of selecting speeds for execution while maximizing the energy savings of the system requires the exploration of a large number of combinations, which is too time consuming to be computed on-line. Thus, we propose an integrated heuristic methodology which executes an optimization procedure and an approximate greedy algorithm in a low computation time. This scheme allows the scheduler to handle power-aware real-time tasks with low cost while maximizing the use of the available resources and without jeopardizing the temporal constraints of the system. Simulation results show that our heuristic methodology achieves a performance with near-optimal results MH - Israel MH - Mexico|Distrito Federal MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000184737300005 SO - Power-Aware Computer Systems 2003 ;2325():68-83 8787 UI - 6286 AU - Mejia S AU - Giraldo M AU - Pineda D AU - Ardila A AU - Lopera F AD - Univ Antioquia, Fac Med, Neurosci Grp, Medellin, ColombiaUniv San Buenaventura, Fac Psychol, Masters ProgramNeuropsychol, Neuropsychol & Conduct Disorder Grp, Medellin, ColombiaFlorida Int Univ, Miami, FL 33199, USAUniv Nacl Autonoma Mexico, Doctoral Program Psychol, Mexico City 04510, DF, MexicoLopera, F, Univ Antioquia, Fac Med, Neurosci Grp, Calle 62 52-72,POB 5923, Medellin, Colombia TI - Nongenetic factors as modifiers of the age of onset of familial Alzheimer's disease AB - Objective: The purpose of this research was to identify environmental and personal factors that could be related to the variability in the age of onset of familial Alzheimer's disease (M) (36-62 years). Methods: A sample was taken of 49 subjects with FAD and with the mutation E280A in the presenilin-1 gene on chromosome 14; the sample was divided into two subgroups: 27 individuals with age of onset of the disease between 36 and 46 years (early onset) and 22 individuals whose disease began between 47 and 62 years (late onset). Information on environmental and personal factors was collected by means of a questionnaire answered by the patients if their clinical condition allowed it, or by their relatives; such information was organized in a categorical way. Comparisons between the two groups for each categorical variable were done by means of the chi-square test. Noncollinear variables that showed statistical significance were included as independent variables in a logistic regression analysis to predict their association with early onset of the disease. Results: Only 5 of the 140 studied variables were different between the two groups in univariate analysis: education, surgical history, type of stressful event, depression, and affective losses. The logistic regression model was constituted by education, depression, and affective losses. High-level education had approximately 15 times more probability of association with an early onset of the disease; both the history of affective losses and depressive symptoms had 4 times more probability of a similar association. Conclusions: The association of high-level education and early onset of the disease could be related to an earlier detection of symptoms, in turn determined by greater intellectual and environmental demands. The occurrence of depression and affective losses has been considered a prodromic manifestation of the disease. Our findings are evidence of high clinical heterogeneity even in a genetically homogeneous group MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER PUBLISHING CO RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Clinical;Geriatrics & Gerontology;Gerontology;Psychiatry;Psychology U5 - J;Article AV - English IS - 1041-6102 UR - ISI:000188815400002 L2 - Alzheimer's disease;age of onset;educational level;depression;E280A PRESENILIN-1 MUTATION; RISK-FACTORS; EDUCATIONAL-LEVEL; COGNITIVE RESERVE; APOLIPOPROTEIN-E; DEMENTIA; DEPRESSION; DECLINE; OCCUPATION; ASSOCIATION SO - International Psychogeriatrics 2003 ;15(4):337-349 8788 UI - 8734 AU - Meju MA AU - Gallardo LA AU - Mohamed AK AD - Univ Lancaster, Dept Environm Sci, Lancaster LA1 4YQ, EnglandUniv Leicester, Dept Geol, Leicester LE1 7RH, Leics, EnglandCICESE, Mexico City, DF, MexicoMeju, MA, Univ Lancaster, Dept Environm Sci, Lancaster LA1 4YQ, England TI - Evidence for correlation of electrical resistivity and seismic velocity in heterogeneous near-surface materials AB - [1] The electrical resistivity and seismic velocity distributions over a buried hillside have been obtained using non-invasive controlled experiments on coincident profiles and 2D image reconstructions. The optimal images are in structural agreement and allow the deduction of two opposite resistivity-velocity trends in the near-surface materials. For both trends, the resistivity (rho) and p-wave velocity (V-p) are related in the form Log(10) rho = mLog(10)V(p) + c with the respective constants m and c having different signs in unconsolidated and consolidated materials MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000182237900001 SO - Geophysical Research Letters 2003 ;30(7): 8789 UI - 7684 AU - Melendez-Alafort L AU - Ramirez FD AU - Ferro-Flores G AU - de Murphy CA AU - Pedraza-Lopez M AU - Hnatowich DJ AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Autonoma Estado Mexico, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Massachusetts, Sch Med, Amherst, MA 01003, USAFerro-Flores, G, Inst Nacl Invest Nucl, Mexico City 11801, DF, Mexico TI - Lys and Arg in UBI: A specific site for a stable Tc-99m complex? AB - The aim of this study was to help establish if ubiquicidin peptide 29-41 fragment (UBI) contains a specific site for Tc-99m labeling by a new direct method under alkaline conditions. Since this peptide does not have cysteine residues, it is possible that neighboring arginine and lysine in the peptide amino acid sequence (Thr-Gly-Arg-Ala-Lys-Arg-Arg-Met-Gln-Tyr-Asn-Arg-Arg) could be a specific coordination site to form a stable Tc-99m-UBI complex. Following direct labeling, the in vitro stability of Tc-99m-UBI was compared to UBI radiolabeled by one indirect method using HYNIC/tricine and HYNIC/tricine/EDDA. Radiochemical purity of Tc-99m-UBI averaged 97% compared to 88% for Tc-99m-HYNIC-UBI/tricine and 98% for Tc-99m-HYNIC-UBI/tricine/EDDA. Both Tc-99m-HYNIC-UBI (tricine or EDDA) and Tc-99m-UBI showed stability in human serum and solutions of cysteine. Tc-99m-UBI radiochemical purity 24 h after dilution in 0.9% NaCl was greater than 90% at pH 9 and greater than 95% at pH 6.5. Under one set of experimental conditions, in vitro binding to bacteria of Tc-99m-UBI was 35% and identical to that of Tc-99m-HYNIC-UBI/tricine and Tc-99m-HYNIC-UBI/tricine/EDDA at 32% and 31% respectively. The biodistribution of Tc-99m-UBI in mice showed a rapid renal clearance. To help identify the site(s) of 99'Tc binding following direct labeling, molecular mechanics and quantum-mechanical calculations were performed which showed that the amine groups of Arg(7) and Lys are the most probable site. The calculations show that these groups can form a square pyramid with two water molecules for the Tc cation (dxysp(3)). It will be necessary to isolate and characterize the Tc-99(V)(O)-UBI (H2O)(n) complex to confirm these results. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0969-8051 UR - ISI:000184723200005 L2 - ubiquicidin;UBI;antimicrobial peptides;direct method;technetium-99m labeled peptides;PEPTIDES; RADIOPHARMACEUTICALS; INFECTIONS SO - Nuclear Medicine and Biology 2003 ;30(6):605-615 8790 UI - 8454 AU - Melin J AU - Aparicio F AU - Galvan M AU - Fuentealba P AU - Contreras R AD - Univ Chile, Fac Ciencias, Dept Quim, Santiago, ChileUniv Chile, Fac Ciencias, Dept Fis, Santiago, ChileUAM, Dept Quim, Mexico City, DF, MexicoMelin, J, Univ Chile, Fac Ciencias, Dept Quim, Casilla 653, Santiago, Chile TI - Chemical reactivity in the {N, N-S, nu(r)} space AB - A reactivity picture developed within, the spin-polarized density functional theory defined in the E{N, N-S, v(r)} space is discussed. The reactivity model including changes in the total number of electrons N, the spin number (impaired electron number) N-S, and the external potential v(r) is tested against two chemical processes involving radical species. They are the hydrogenation reaction of the succinimidyl radical and the Bergman cyclization. Although the former reaction appears to be mostly driven by the spin potential, a quantity measuring the variations in electronic energy with respect to the spin multiplicity changes; the latter presents highly electrocyclic character without significant spin-polarization effects MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000182893900033 L2 - BERGMAN CYCLIZATION; LOCAL HARDNESS; DENSITY; PRINCIPLE; STABILITY SO - Journal of Physical Chemistry A 2003 ;107(19):3831-3835 8791 UI - 7666 AU - Menchaca JL AU - Jachimska B AU - Cuisinier F AU - Perez E AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoPolish Acad Sci, Inst Catalysis & Surface Chem, PL-30239 Krakow, PolandUniv Strasbourg 1, INSERM, U424, F-67085 Strasbourg, FrancePerez, E, Univ Autonoma San Luis Potosi, Inst Fis, Alvaro Obregon 64, San Luis Potosi 78000, SLP, Mexico TI - In situ surface structure study of polyelectrolyte multilayers by liquid-cell AFM AB - Liquid cell Atomic Force Microscopy (AFM) is used to image in situ self-assembly polyelectrolyte films (SAPFs). We show that the technique is appropriate to study surface structure of these systems. In this work, we report images of layer-by-layer deposition for negative poly(sodium 4-styrenesulfonate) (PSS) and positive poly(allylamine hydrochloride) (PAH), when an initial layer of positive poly(ethylenimine) (PEI) starts the multilayer polymer film on a glass surface. This work is addressed to study first layers of SAPFs. Height, AFM images are obtained using contact mode at different pH buffer where polyelectrolytes are initially dissolved. The pH values were: 3.5, 6.8 and 10.5. In all the cases, the polyelectrolyte film surfaces are not flat, they show rough surfaces with average grain domains ranging from 50 to 90 nm in diameter. The roughness and grain domains slightly grow as a function of deposited layer. In order to understand the origin of grain structure observed by AFM, size of positive-negative polyelectrolyte complex was determined by Dynamic Light Scattering. The results suggest that grains of granulate surface are formed by polyelectrolyte complexes. In the present work, we also discuss effects of kinetics and preparation on the surface structure. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|San Luis Potosi MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000184895400022 L2 - multilayers;surface structure;polyelectrolytes;AFM liquid-cell;polyelectrolyte complexes;ATOMIC-FORCE MICROSCOPY; THIN-FILMS; ULTRATHIN FILMS; REFLECTOMETRY; DEPOSITION; STEP SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2003 ;222(1-3):185-194 8792 UI - 7589 AU - Mendes PR AU - Abreu MC AU - Baldazzi G AU - Bollini D AU - Rodriguez AEC AU - Dabrowski W AU - Garcia AD AU - Gambaccini M AU - Giubellino P AU - Gombia M AU - Grybos P AU - Idzik M AU - Marzari-Chiesa A AU - Montano LM AU - Prino F AU - Ramello L AU - Rodrigues S AU - Sitta M AU - Sousa P AU - Swientek K AU - Taibi A AU - Tuffanelli A AU - Wheadon R AU - Wiacek P AD - LIP, P-1000149 Lisbon, PortugalUniv Algarve, P-1000149 Lisbon, PortugalUniv Bologna, Dipartimento Fis, Bologna, ItalyIst Nazl Fis Nucl, I-40126 Bologna, ItalyCEADEN, Havana, CubaAcad Min & Met, Fac Phys & Nucl Tech, Krakow, PolandUniv Ferrara, Dipartmento Fis, I-44100 Ferrara, ItalyIst Nazl Fis Nucl, Ferrara, ItalyIst Nazl Fis Nucl, I-10125 Turin, ItalyUniv Turin, Dipartimento Fis Sperimentale, Turin, ItalyCINVESTAV, Mexico City 14000, DF, MexicoUniv Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Alessandria, ItalyIst Nazl Fis Nucl, Alessandria, ItalyMendes, PR, LIP, Av Elias Garcia 14-1, P-1000149 Lisbon, Portugal TI - Silicon strip detectors for two-dimensional soft X-ray imaging at normal incidence AB - A simple prototype system for static two-dimensional soft X-ray imaging using silicon microstrip detectors irradiated at normal incidence is presented. Radiation sensors consist of single-sided silicon detectors made from 300 mum thick wafers, read by RX64 ASICs. Data acquisition and control is performed by a Windows PC workstation running dedicated LabVIEW routines, connected to the sensors through a PCI-DIO-96 interface. Two-dimensional images are obtained by scanning a lead collimator with a thin slit perpendicular to the strip axis, along the whole detector size; the several strip profiles (slices) taken at each position are then put together to form a planar image. Preliminary results are presented, illustrating the high-resolution imaging capabilities of the system with soft X-rays. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - Portugal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000185047700050 L2 - soft X-ray imaging;silicon microstrip detectors;RX64 readout chip SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;509(1-3):333-339 8793 UI - 8445 AU - Mendez-Bermudez JA AU - Luna-Acosta GA AU - Seba P AU - Pichugin KN AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Hradec Kralove, Dept Phys, Hradec Kralove, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicLV Kirenskii Inst Phys, Krasnoyarsk 660036, RussiaMendez-Bermudez, JA, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Chaotic waveguide-based resonators for microlasers AB - We propose the construction of highly directional emission microlasers using two-dimensional high-index semiconductor waveguides as open resonators. The prototype waveguide is formed by two collinear leads connected to a cavity of certain shape. The proposed lasing mechanism requires that the shape of the cavity yield mixed chaotic ray dynamics so as to have the approplate (phase space) resonance islands. These islands allow, via Heisenberg's uncertainty principle, the appearance of quasibound states (QBSs) which, in turn, propitiate the lasing mechanism. The energy values of the QBSs are found through the solution of the Helmholtz equation. We use classical ray dynamics to predict the direction and intensity of the lasing produced by such open resonators for typical values of the index of refraction MH - Czech Republic MH - Mexico|Puebla MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000182824200004 L2 - QUANTUM-CLASSICAL CORRESPONDENCE; MORPHOLOGY-DEPENDENT RESONANCES; DIRECTIONAL EMISSION; OPTICAL CAVITIES; MICRODISK LASERS; WAVE CHAOS; DROPLETS; PRECESSION; BILLIARDS; STATES SO - Physical Review B 2003 ;67(16): 8794 UI - 9073 AU - Mendez-Lozano J AU - Torres-Pacheco I AU - Fauquet CM AU - Rivera-Bustamante RF AD - U Irapuato, Dept Ingn Genet, Ctr Invest & Estudios Avanzados, IPN, Irapuato, Gto, MexicoILTAB, Danforth Plant Sci Ctr, St Louis, MO, USARivera-Bustamante, RF, U Irapuato, Dept Ingn Genet, Ctr Invest & Estudios Avanzados, IPN, Apartado Postal 629, Irapuato, Gto, Mexico TI - Interactions between geminiviruses in a naturally occurring mixture: Pepper huasteco virus and Pepper golden mosaic virus AB - Pepper huasteco virus (PHV) and Pepper golden mosaic virus (PepGMV) are found in mixtures in many horticultural crops in Mexico. This combination constitutes an interesting, naturally occurring model system to study several aspects of virus-virus interactions. Possible interactions between PHV and PepGMV were studied at four levels: symptom expression, gene expression, replication, and movement. In terms of symptom expression, the interaction was shown to be host-dependent because antagonism was observed in pepper, whereas synergism was detected in tobacco and Nicotiana benthamiana. PHV and PepGMV did not generate viable pseudorecombinant viruses; however, their replication is increased during mixed infections. An asymmetric complementation in movement was observed because PHV was able to support the systemic movement of PepGMV A whereas PepGMV did not support the systemic distribution of PHV A. Heterologous transactivation of both coat protein promoters also was detected. Several conclusions can be drawn from these experiments. First, viruses coinfecting the same plant can interact at several levels (replication, movement) and in different manners (synergism, antagonism); some interactions might be host dependent; and natural mixed infections could be a potential source of geminivirus variability by generating viable tripartite combinations that could facilitate recombination events MH - Mexico|Guanajuato MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000181217100003 L2 - COMPLETE NUCLEOTIDE-SEQUENCE; COAT PROTEIN; BIPARTITE GEMINIVIRUSES; TRANSGENIC TOBACCO; CASSAVA; PSEUDORECOMBINATION; RECOMBINATION; INFECTION; DISEASE; COMPLEMENTATION SO - Phytopathology 2003 ;93(3):270-277 8795 UI - 6798 AU - Mendez-Sanchez N AU - Rahbar-Tabrizi N AU - King-Martinez AC AU - Wittenburg H AU - Keppeler H AU - Schirin-Sokhan R AU - Werth A AU - Wasmuth HE AU - Uribe M AU - Matern S AU - Lammert F AD - Med Sur Clin & Fdn, Mexico City, DF, MexicoUniv Aachen, D-5100 Aachen, GermanyUniv Leipzig, Leipzig, Germany TI - Risk factors for cholesterol gallstone formation are associated with common polymorphisms of ABCG5/ABCG8, the genes encoding the biliary cholesterol half-transporters, in German and Mexican gallstone patients MH - Germany MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 2 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000185816700478 SO - Hepatology 2003 ;38(4):388A-388A 8796 UI - 7153 AU - Mendez-Sanchez RA AU - Kuhl U AU - Barth M AU - Lewenkopf CH AU - Stockmann HJ AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoUniv Marburg, Fachbereich Phys, D-35032 Marburg, GermanyUERJ, Inst Fis, BR-20550900 Rio De Janeiro, BrazilMendez-Sanchez, RA, UNAM, Ctr Ciencias Fis, AP 48-3, Cuernavaca 62210, Morelos, Mexico TI - Distribution of reflection coefficients in absorbing chaotic microwave cavities AB - The distribution of reflection coefficients P(R) for chaotic microwave cavities with time-reversal symmetry is investigated in different absorption and antenna coupling regimes. For all regimes the agreement between experimental distributions and random-matrix theory predictions is very good, provided both the antenna coupling T-a and the wall absorption strength T-w are taken into account in an appropriate way. These parameters are determined by independent experimental quantities MH - Brazil MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000186138300021 L2 - DISORDERED-SYSTEMS; SCATTERING; PROBABILITY; PHYSICS; LEADS SO - Physical Review Letters 2003 ;91(17): 8797 UI - 9305 AU - Mendoza-Franco EF AU - Scholz T AU - Cabanas-Carranza G AD - CINVESTAV, IPN Unidad Merida, Lab Parasitol, Ctr Invest & Estudios Avanzados Inst Politecn Nac, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoMendoza-Franco, EF, CINVESTAV, IPN Unidad Merida, Lab Parasitol, Ctr Invest & Estudios Avanzados Inst Politecn Nac, Carretera Antigua Progreso Km 6,Apartado Postal 73, Merida 97310, Yucatan, Mexico TI - Guavinella tropica n. gen., n. sp (Monogenea : Dactylogyridae) from the gills of the bigmouth sleeper, Gobiomorus dormitor (Perciformes : Eleotridae), from Mexico AB - The ancyrocephaline monogene Guavinella tropica n. gen., n. sp. is described from the gills of the bigmouth sleeper, Gobiomorus dormitor (Perciformes: Eleotridae), from Veracruz, Mexico. This is the first dactylogyrid reported from a Neotropical eleotrid fish MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 3 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000180758000003 L2 - Monogenea;Dactylogyridae;Guavinella tropica;Perciformes;Eleotridae;Gobiomorus dormitor;Mexico;new genus;new species;FRESH-WATER FISHES; YUCATAN PENINSULA; NEOTROPICAL MONOGENEA; SOUTHEASTERN MEXICO; CENOTES SINKHOLES; CICHLID FISHES; ANCYROCEPHALINAE; PROPOSAL; KRITSKY SO - Comparative Parasitology 2003 ;70(1):26-31 8798 UI - 9306 AU - Mendoza-Franco EF AU - Posel P AU - Dumailo S AD - CINVESTAV, IPN Unidad Merida, Lab Parasitol, Ctr Invest & Estudios Avanzados Inst Politecn Nac, Merida, Yucatan, MexicoUniv S Bohemia, Fac Agr, Ceske Budejovice, Czech RepublicBICU, Facl Nat Resources & Environm, Bluefields, NicaraguaMendoza-Franco, EF, CINVESTAV, IPN Unidad Merida, Lab Parasitol, Ctr Invest & Estudios Avanzados Inst Politecn Nac, Carretera Antigua Progreso Km 6,Apartado Postal 73, Merida, Yucatan, Mexico TI - Monogeneans (Dactylogyridae : Ancyrocephalinae) of freshwater fishes from the Caribbean coast of Nicaragua AB - The results of a systematic survey of species of monogeneans (Dactylogyridae) collected from the gills of pimelodid, poeciliid, cichlid, and characid fishes from the Atlantic coast of Nicaragua in 1999 are presented. The following species were recovered: Ameloblastella chavarriai and Aphanoblastella travassosi occurred on the gills of Rhamdia nicaraguensis; Salsuginus neotropicalis on Belonesox belizanus; Sciadicleithrum bravohollisae on Vieja maculicauda; Sciadicleithrum meekii on Archocentrus nigrofasciatus; Sciadicleithrum mexicanum on Cichlasoma urophthalmus, Parachromis dovii, Tomocichla tuba, V. maculicauda, and Parachromis managuense; Sciadicleithrum nicaraguense on Amphilophus alfari; and Palombitrema heteroancistrium, Urocleidoides costaricensis, and Urocleidoides strombicirrus on Astyanax fasciatus. Data on morphological and biometrical variability of individual species from different hosts are provided. Aspects of the zoogeographical distribution of the species found, which are mostly similar to those of southeastern Mexico, are discussed MH - Czech Republic MH - Mexico|Yucatan MH - Nicaragua PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 5 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000180758000004 L2 - Monogenea;Dactylogyridae;Ameloblastella;Aphanoblastella;Characidae;Cichlidae;Salsuginus;Sciadicleithrum;Pimelodidae;Poeciliidae;Palombitrema;Urocleidoides;Nicaragua;neotropics;Ameloblastella chavarriai;Amphilophus alfari;Aphanoblastella travassosi;Archocentrus nigrofasciatus;Astyanax fasciatus;Belonesox belizanus;Cichlasoma urophthalmus;Palombitrema heteroancistrium;Parachromis dovii;Parachromis managuense;Rhamdia nicaraguensis;Salsuginus neotropicalis;Sciadicleithrum bravohollisae;Sciadicleithrum meekii;Sciadicleithrum mexicanum;Sciadicleithrum nicaraguense;Tomocichla tuba;Urocleidoides costaricensis;Urocleidoides strombicirrus;Vieja maculicauda;WATER FISHES; YUCATAN PENINSULA; CICHLID FISHES; NEOTROPICAL MONOGENOIDEA; SOUTHEASTERN MEXICO; CENOTES SINKHOLES; CENTRAL-AMERICA; N.; GILLS SO - Comparative Parasitology 2003 ;70(1):32-41 8799 UI - 6600 AU - Mendoza-Mendoza A AU - Pozo MJ AU - Grzegorski D AU - Martinez P AU - Garcia JM AU - Olmedo-Monfil V AU - Cortes C AU - Kenerley C AU - Herrera-Estrella A AD - Ctr Invest & Estudios Avanzados, Dept Plant Genet Engn, Guanajuato 36500, MexicoTexas A&M Univ, Dept Microbiol & Plant Pathol, College Stn, TX 77843, USAHerrera-Estrella, A, Ctr Invest & Estudios Avanzados, Dept Plant Genet Engn, Unidad Irapuato,Apartado Postal 629, Guanajuato 36500, Mexico TI - Enhanced biocontrol activity of Trichoderma through inactivation of a mitogen-activated protein kinase AB - The production of lytic enzymes in Trichoderma is considered determinant in its parasitic response against fungal species. A mitogen-activated protein kinase encoding gene, tvk1, from Trichoderma virens was cloned, and its role during the mycoparasitism, conidiation, and biocontrol was examined in tvk1 null mutants. These mutants showed a clear increase in the level of the expression of mycoparasitism-related genes under simulated mycoparasitism and during direct confrontation with the plant pathogen Rhizoctonia solani. The null mutants displayed an increased protein secretion phenotype as measured by the production of lytic enzymes in culture supernatant compared to the wild type. Consistently, biocontrol assays demonstrated that the null mutants were considerably more effective in disease control than the wild-type strain or a chemical fungicide. In addition, tvk1 gene disruptant strains sporulated abundantly in submerged cultures, a condition that is not conducive to sporulation in the wild type. These data suggest that Tvk1 acts as a negative modulator during host sensing and sporulation in T. virens MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 13 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000187554600120 L2 - MAP KINASE; RHIZOCTONIA-SOLANI; VIRENS; EXPRESSION; GENES; PATHOGENICITY; PATHOGENESIS; GLIOCLADIUM; CONIDIATION; CLONING SO - Proceedings of the National Academy of Sciences of the United States of America 2003 ;100(26):15965-15970 8800 UI - 8815 AU - Mendoza-Yero O AU - Marti-Lopez L AU - Martinez-Celorio RA AD - Ctr Neurociencias Cuba, Havana 10600, CubaCtr Invest Opt, Leon, Gto, MexicoMendoza-Yero, O, Ctr Neurociencias Cuba, AP 6412, Havana 10600, Cuba TI - Roughness and gradient parameters for characterising shape uniformity of laser beams AB - We define six parameters, the roughness parameter, the local gradient parameter, the directionless gradient parameter, the integral gradient parameter, the directionless integral gradient parameter and the absolute gradient parameter for characterising the uniformity of a laser beam in its transversal section. For shape-invariant beams the roughness parameter is propagation invariant. The absolute gradient parameter is propagation invariant for symmetric shape invariant beams. As an example, five of the defined parameters are calculated for a dummy irradiance. The values of the roughness parameter and the absolute parameter are calculated and tabulated for symmetric Hermite-Gaussian, Laguerre-Gaussian, spherical Gaussian, flattened Gaussian (at the waist plane) and super Gaussian beams (at the waist plane). The results are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Guanajuato PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0143-8166 UR - ISI:000181912200005 L2 - laser beam parameters;ABCD OPTICAL-SYSTEMS; GAUSSIAN BEAMS; KURTOSIS PARAMETER; PROPAGATION FACTOR; LENSES; LAWS SO - Optics and Lasers in Engineering 2003 ;39(5-6):549-566 8801 UI - 6697 AU - Mendoza A AU - Aguilar J AU - Basallote MG AU - Gil L AU - Hernandez JC AU - Manez MA AU - Garcia-Espana E AU - Ruiz-Ramirez L AU - Soriano C AU - Verdejo B AD - Univ Cadiz, Fac Ciencias, Dept Ciencia Mat & Ingn Met, Cadiz 11510, SpainUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Valencia, Dept Quim Inorgan, E-46100 Valencia, SpainUniv Valencia, Fac Farm, Dept Quim Organ, Valencia 46100, SpainBasallote, MG, Univ Cadiz, Fac Ciencias, Dept Ciencia Mat & Ingn Met, Apartado 40, Cadiz 11510, Spain TI - Hydrogen-ion driven molecular motions in Cu2+-complexes of a ditopic phenanthrolinophane ligand AB - One of the first kinetic evaluations of a metal ion interchange between the two coordination sites of a ditopic macrocycle is presented MH - Mexico|Distrito Federal MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000187418800039 L2 - COMPLEXES; KINETICS; CU(II) SO - Chemical Communications 2003 ;(24):3032-3033 8802 UI - 8446 AU - Mendoza BS AU - Esser N AU - Richter W AD - Ctr Invest Opt AC, Guanajuato, MexicoTech Univ Berlin, Sekratariat PN6 1, Inst Festkorperphys, D-10623 Berlin, GermanyMendoza, BS, Ctr Invest Opt AC, Guanajuato, Mexico TI - Model for the effects of surface disorder on reflectance anisotropy spectroscopy AB - We present a simple model for surface disordering and study its consequences on reflectance anisotropy spectroscopy (RAS). Large unit cells are taken as a basis to introduce disorder by means of displacing the atoms from their equilibrium positions. Different displacement schemes are employed and ensemble averages are calculated in order to study the influence on the optical response. For reasons of computing time the semiempirical tight binding approach with an sp(3)s(*) basis is used to calculate the microscopic dielectric response of the surface, through which RAS is obtained. The well studied clean GaAs(110)(1x1) surface is used as an example. We find that the spectral RAS structures of GaAs(110)(1x1) follow a well defined behavior as a function of disorder and that a rather small number of surface atoms are needed only at equilibrium positions to produce already the RAS signal specific for the fully ordered surface reconstruction. This is a consequence of nearest neighbor interactions dominating the polarizability response and explains the fast dynamic response of RAS as compared to the diffraction methods which are limited by their large coherence length (low energy and reflection high energy electron diffraction) MH - Germany MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000182824200064 L2 - OPTICAL-PROPERTIES; MICROSCOPIC CALCULATION; SPECTRUM; GROWTH; DIMERS SO - Physical Review B 2003 ;67(16): 8803 UI - 6398 AU - Mendoza GD AU - Britton RA AD - Programa Ganaderia, Mexico City 56230, DF, MexicoUniv Nebraska, Dept Anim Sci, Lincoln, NE, USAMendoza, GD, Programa Ganaderia, Km 36-5 Carr Mexico Texcoco, Mexico City 56230, DF, Mexico TI - Response of intestinal starch digestion to duodenal infusion of casein AB - To determine the effect of duodenal infusion of intact casein at 0, 20 or 40 g/d level on intestinal starch digestion, fifteen ruminally, duodenally and ileally fistulated sheep were assigned randomly to treatments. Treatments did not affect percent casein digestion in different parts of gastrointestinal tract. Starch digestion in the small intestine, expressed as a percentage of that entering, increased linearly (P<0.09) from 83 to 90 per cent in response to casein infusions. As more starch was digested in the small intestine (percentage of entering), less starch tended to be digested in the large intestine (linear, P<0.14). Intact casein infused into the duodenuin increased the digestion of starch entering the small intestine by an unknown mechanism that presumably increased pancreatic amylase enzyme secretion MH - Mexico|Distrito Federal MH - USA PB - IZATNAGAR: GARUDA SCIENTIFIC PUBLICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0971-2119 UR - ISI:000188468100002 L2 - starch;digestion;small intestine;casein;sheep;PROTEIN; STEERS; CORN SO - Journal of Applied Animal Research 2003 ;24(2):123-128 8804 UI - 7776 AU - Meneses A AU - Verastegui E AU - Barrera JL AU - de la Garza J AU - Hadden JW AD - Inst Nacl Cancerol, Dept Pathol, Mexico City, DF, MexicoUniv S Florida, Coll Med, Tampa, FL, USAHadden, JW, Inst Nacl Cancerol, Dept Pathol, Av San Fernando, Mexico City, DF, Mexico TI - Lymph node histology in head and neck cancer: impact of immunotherapy with IRX-2 AB - Objective: To determine if lymph nodes (LN) of patients receiving IRX-2 immunotherapy reflect changes in histology. Setting: National Cancer Institute, Mexico City, Mexico. Patients: Thirty patients with advanced squamous cell carcinoma of the head and neck (H&N SCC) and 10 non-cancer controls. Intervention: A 21-day cycle of preoperative immunotherapy, including a single intravenous infusion of low-dose cyclophosphamide (300 Mg/M-2), 10 or 20 daily perilymphatic injections of a natural cytokine mixture (IRX-2) (approximately 200 U interleukin-2 equivalence by enzyme-linked immumosorbent assay), daily oral indomethacin, and daily oral zinc with multivitamins, followed by surgery (20 patients); surgery only (10 patients); LN biopsy controls (10). Outcome measures: Pretreatment biopsies were performed to confirm the diagnosis. Clinical responses were assessed at surgery, and the specimen and a sample of lymph node were analyzed with respect to changes in morphology and lymphoid and inflammatory infiltration (T and B lymphocytes, plasma cells, macrophages, granulocytes, and giant cells). The postsurgical characteristics were ascribed percentages based on a representative section and compared. Results: All 20 H&N SCC patients treated with IRX-2 showed the changes of immune regression of their tumors. previously characterized [Arch. Pathol. Lab. Med. 122 (1998) 447]. The 10 H&N SCC controls showed no such changes. Lymph node histology of the 10 H&N SCC controls showed, compared to non-cancer controls, reduced size, decreased T cell area and density and increased sinus histiocytosis. The lymph nodes of IRX-2-treated H&N SCC patients showed increased size (over both control groups), increased T cell area and density and decreased follicles and sinus histiocytosis. The T cell and/or B cell areas of LN of IRX-2-treated patients showed a high correlation with T and/or B cell infiltration into these tumors (p<0.001). Conclusion: The lymph nodes of patients with H&N SCC are distinguished by T cell depletion and sinus histiocytosis (SH). Immunotherapy reverses these changes and induces nodal expansion and lymphoid infiltration into the tumor that correlates with LN changes. The correlation of nodal expansion with tumor lymphoid infiltration and regression implies an effective immunization to host tumor antigens occurring at the level of the regional lymph node. The reversal of sinus histiocytosis, by IRX-2 treatment, in association with nodal expansion suggests that tumor antigen processing via dendritic cells is defective in cancer-bearing patients and that it is corrected by the treatment. (C) 2003 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1567-5769 UR - ISI:000184607100005 L2 - lymph nodes;immunotherapy;IRX-2;SQUAMOUS-CELL CARCINOMA; CYTOKINE MIXTURE IRX-2; PROGNOSTIC-SIGNIFICANCE; IMMUNOREACTIVITY; TUMOR SO - International Immunopharmacology 2003 ;3(8):1083-1091 8805 UI - 6848 AU - Meng XL AU - Romero M AD - Harvard Univ, Cambridge, MA 02138, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoMeng, XL, Harvard Univ, Cambridge, MA 02138, USA TI - Discussion: Efficiency and self-efficiency with multiple imputation inference AB - By closely examining the examples provided in Nielsen (2003), this paper further explores the relationship between self-efficiency (Meng, 1994) and the validity of Rubin's multiple imputation (RMI) variance combining rule. The RMI variance combining rule is based on the common assumption/intuition that the efficiency of our estimators decreases when we have less data. However, there are estimation procedures that will do the opposite, that is, they can produce more efficient estimators with less data. Self-efficiency is a theoretical formulation for excluding such procedures. When a user, typically unaware of the hidden self-inefficiency of his choice, adopts a self-inefficient complete-data estimation procedure to conduct an RMI inference, the theoretical validity of his inference becomes a complex issue, as we demonstrate. We also propose a diagnostic tool for assessing potential self-inefficiency and the bias in the RMI variance estimator, at the outset of RMI inference, by constructing a convenient proxy to the RMI point estimator MH - Mexico|Distrito Federal MH - USA PB - VOORBURG: INT STATISTICAL INST RP - NOT IN FILE U3 - TC 3 U4 - Statistics & Probability U5 - J;Editorial Material AV - English IS - 0306-7734 UR - ISI:000186753100010 L2 - congeniality;incomplete data;missing data;variance decomposition SO - International Statistical Review 2003 ;71(3):607-618 8806 UI - 6265 AU - Mercado A AU - Enck A AU - Zandi-Nejad K AU - Gamba G AU - Mount DB AD - Harvard Univ, Sch Med, VA Boston, Div Renal, Boston, MA, USAHarvard Univ, BWH, Sch Med, Div Renal, Boston, MA, USAUNAM, INNSZ, Mol Physiol Unit, Mexico City, DF, Mexico TI - Role of the C-terminus of K+-Cl- cotransporter proteins in volume sensitivity MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219102514 SO - Journal of the American Society of Nephrology 2003 ;14():546A-546A 8807 UI - 6266 AU - Mercado A AU - Enck A AU - Zandi-Nejad K AU - Gamba G AU - Mount D AD - Harvard Univ, Sch Med, Boston VA, Div Renal, Boston, MA, USAHarvard Univ, BWH, Sch Med, Boston, MA, USAUNAM, INNSZ, Mol Phys Unit, Mexico City, DF, Mexico TI - Functional roles of conserved and variant cysteine residues in the KCC4K(+)-Cl- cotransporter MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219102515 SO - Journal of the American Society of Nephrology 2003 ;14():546A-546A 8808 UI - 7568 AU - Mereles F AU - Gonzalez-Elizondo MS AD - Univ Nacl Asunc, Dept Bot, Fac Ciencias Quim, Asuncion, ParaguayInst Politecn Nacl, CIIDIR, Unidad Durango, Durango 34000, Dgo, MexicoMereles, F, Univ Nacl Asunc, Dept Bot, Fac Ciencias Quim, Casilla Correo 11001-3291,Campus UNA, Asuncion, Paraguay TI - Eleocharis canindeyuensis F. Mereles & S. Gonzalex (cyperaceae), a new species for flora in Paraguay AB - Twenty-eighth installment of a series dedicated to the presentation of taxonomic, nomenclatural or floristic novelties in relation with the project "Flora del Paraguay" as well as complements to already published treatments. Organizational information and accounts on the advancement of the project are sometimes added by the editors. - Notula 89. Eleocharis canindeyuensis F. Mereles & S. Gonzalez (Cyperaceae), a new species for the flora of Paraguay, by Fatima Mercies & M. Socorro Gonzalez-Elizondo MH - Mexico|Durango MH - Paraguay PB - CHAMBESY: CONSERVATOIRE ET JARDIN BOTANIQUES VILLE GENEVE RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - Spanish IS - 0373-2967 UR - ISI:000185022300003 L2 - Paraguay;floristics;systematics SO - Candollea 2003 ;58(1):75-78 8809 UI - 7096 AU - Mermoz ME AU - Reboreda JC AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ecol Genet & Evoluc, RA-1428 Buenos Aires, DF, ArgentinaInst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91070, Veracruz, MexicoMermoz, ME, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ecol Genet & Evoluc, Pabellon II,Ciudad Univ,CEHA, RA-1428 Buenos Aires, DF, Argentina TI - Reproductive success of shiny cowbird (Molothrus bonariensis) parasitizing the larger brown-and-yellow marshbird (Pseudoleistes virescens) in Argentina AB - Shiny Cowbirds (Molothrus bonariensis) often parasitize larger hosts. It has been proposed that larger hosts are preferred by that parasite because they provide higher reproductive success, but available data are quite variable. We studied the reproductive success of Shiny Cowbirds in nests of Brown-and-yellow Marshbirds (Pseudoleistes virescens), a larger and often multiply parasitized host. To estimate the extent of interspecific competition, we compared the hatching success of parasite eggs in nests with and without reduction of the clutch size of the host as a result of egg punctures inflicted by the parasite, and the survival and growth of parasite chicks reared with and without host chicks. To estimate the extent of intraspecific competition, we compared Shiny Cowbird egg losses, hatching success, and chick survival in singly versus multiply parasitized nests. Reproductive success of Shiny Cowbirds was 8% with depredation causing 80% of losses. Clutch reduction due to egg punctures were higher in multiply than in singly parasitized nests, but it did not improve hatching success of parasite eggs. Neither survival nor growth of parasite chicks was affected by the presence of host chicks. Shiny Cowbird hatching success and chick survival did not differ between singly and multiply parasitized nests. Parasite chicks were smaller than same-age Brown-and-yellow Marshbird chicks. However, because parasite chicks hatched one or two days before host chicks and had a higher growth rate, they were the larger chicks in the nest. Overall Shiny Cowbird reproductive success in Brown-and-yellow Marshbird nests was apparently higher than that reported in other smaller or similar-sized hosts. We think that host life-history traits like large clutch size, a longer incubation period, and slower growth rate of chicks are responsible for the high reproductive success of Shiny Cowbirds with Brown-and-yellow Marshbirds. Received 17 July 2002, accepted 14 June 2003 MH - Argentina MH - Mexico|Veracruz PB - LAWRENCE: AMER ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 4 U4 - Ornithology U5 - J;Article AV - English IS - 0004-8038 UR - ISI:000186338400019 L2 - RUFOUS-COLLARED SPARROW; GREAT-SPOTTED-CUCKOOS; BROOD PARASITISM; HEADED COWBIRDS; CUCULUS-CANORUS; HOST GENERALIST; NEST PREDATION; POWER ANALYSIS; GROWTH-RATES; EGGS SO - Auk 2003 ;120(4):1128-1139 8810 UI - 9117 AU - Mermoz ME AU - Fernandez GJ AD - Inst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91070, Veracruz, MexicoUniv Nacl Lujan, Programa Ecol Matemat, Ecol Lab, RA-6700 Buenos Aires, DF, ArgentinaMermoz, ME, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ecol Genet & Evoluc, Lab Ecol & Comportamiento Anim, Pabellon 2 Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina TI - Breeding success of a specialist brood parasite, the Screaming Cowbird, parasitizing an alternative host AB - The Screaming Cowbird (Molothrus rufoaxillaris) is a specialized brood parasite that primarily parasitizes the Bay-winged Cowbird, (Agelaioides badius; Screaming Cowbirds parasitize 80-100% of this species' nests). In contrast, the Shiny Cowbird (M. bonariensis) parasitizes more than 200 hosts. According to the differential reproductive success hypothesis, we expect that Screaming Cowbirds would have a lower reproductive success than Shiny Cowbirds when parasitizing other hosts. We assessed the breeding success of the Screaming Cowbird using an alternative host, the Brown-and-yellow Marshbird (Pseudoleistes virescens). This species is a common host of the Shiny Cowbird with 60-70% of nests parasitized, and is also regularly parasitized by the Screaming Cowbird but with lower frequency (6-20% of the nests). We compared the breeding success of Screaming and Shiny Cowbirds parasitizing this host species. No differences were found in the number of fledglings produced per egg laid between cowbird species. About 8-10% of cowbird eggs produced fledglings. The daily survival rate of Screaming Cowbird eggs was higher than daily survival rates for Shiny Cowbird eggs, but no differences were detected in the nestling daily survival rates. Moreover, we could not detect any difference in the hatching success (nestlings per egg), fledging success (fledglings per nestling), or growth rates of the two parasitic cowbird chicks. Furthermore, breeding success and growth rates of Screaming Cowbird chicks were similar to those previously reported while parasitizing the Bay-winged Cowbird. Our results are not consistent with the differential reproductive success hypothesis proposed as an explanation for the specialized parasitism of Screaming Cowbirds MH - Argentina MH - Mexico|Veracruz PB - LAWRENCE: COOPER ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Ornithology U5 - J;Article AV - English IS - 0010-5422 UR - ISI:000181130200006 L2 - breeding success;brood parasitism;Brown-and-yellow Marshbird;host specialization;Screaming Cowbird;Shiny Cowbird;MOLOTHRUS-RUFOAXILLARIS; YELLOW MARSHBIRDS; NEST SUCCESS; EGGS; BADIUS SO - Condor 2003 ;105(1):63-72 8811 UI - 7601 AU - Meyer-Hoffert U AU - Lezcano-Meza D AU - Bartels J AU - Montes-Vizuet AR AU - Schroder JM AU - Teran LM AD - Univ Kiel, Dept Dermatol, DE-24105 Kiel, GermanyInst Nacl Enfermedades Respiratorias, Dept Allergy & Clin Immunol, Mexico City, DF, MexicoMeyer-Hoffert, U, Univ Kiel, Dept Dermatol, Schittenhelmstr 7, DE-24105 Kiel, Germany TI - Th2-and to a lesser extent Th1-type cytokines upregulate the production of both CXC (IL-8 and gro-alpha) and CC (RANTES, eotaxin, eotaxin-2, MCP-3 and MCP-4) chemokines in human airway epithelial cells AB - Background: Both CXC and CC chemokines play an important role in leukocyte recruitment. However, a systematic examination of their production by human airway epithelial cells (HAECs) has not been carried out. The objective of this study was to investigate whether Th1-and Th2-type cytokines regulate chemokine production in HAECs. Methods: HAECs were grown from both nasal and bronchial tissue and subsequently stimulated with either Th1- or Th2-type cytokines. Results: Constitutive mRNA expression for gro-alpha, IL-8 and RANTES was seen in both human nasal and human bronchial epithelial cells. IL-4 was the strongest stimulus for both gene,expression and protein production of the chemokines RANTES, IL-8 and gro-alpha, while both IL-13 and IFN-gamma were weaker inducers of these chemokines, with the exception of gro-alpha (IL-13 was a strong stimulus for gro-alpha production). TNF-alpha synergized with IL-4, and to a lesser extent with IFN-gamma and IL-13, to release RANTES, IL-8 and gro-alpha. IL-4 and to a lesser extent IL-13 and IFN-gamma stimulated the production of MCP-3 and -4, eotaxin and eotaxin-2 immunoreactivities. However, no induction of the mRNAs encoding these chemokines was observed, suggesting that they may be released from a preformed pool within the HAECs. Conclusion: These findings suggest that when released into the airways, Th2- and to a lesser extent Th1-type cytokines may stimulate recruitment of eosinophils and neutrophils through the release of CC (RANTES, MCP-3 and -4, eotaxin and eotaxin-2) and CXC chemokines (gro-alpha and IL-8). Copyright (C) 2003 S. Karger AG, Basel MH - Germany MH - Mexico|Distrito Federal PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 14 U4 - Allergy;Immunology U5 - J;Article AV - English IS - 1018-2438 UR - ISI:000185024200005 L2 - airway epithelial cells;chemokines;eosinophils;neutrophils;Th1 cytokines;Th2 cytokines;DIFFERENTIAL REGULATION; MESSENGER-RNA; T-CELLS; EXPRESSION; RELEASE; ASTHMA; INTERLEUKIN-4; INFLAMMATION; TH2; CORTICOSTEROIDS SO - International Archives of Allergy and Immunology 2003 ;131(4):264-271 8812 UI - 6137 AU - Meza-Figueroa D AU - Valencia-Moreno M AU - Valencia VA AU - Ochoa-Landin L AU - Perez-Segura E AU - az-Salgado C AD - Univ Sonora Rosales & Transversal, Dept Geol, Hermosillo 83000, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Guerrero, MexicoMeza-Figueroa, D, Univ Sonora Rosales & Transversal, Dept Geol, Hermosillo 83000, Sonora, Mexico TI - Major and trace element geochemistry and Ar-40/Ar-39 geochronology of Laramide plutonic rocks associated with gold-bearing Fe skarn deposits in Guerrero state, southern Mexico AB - Fe-Au skarn deposits related to intrusive centers, mostly of granodioritic composition, are widespread in southern Mexico's Guerrero state. These intrusive rocks are largely associated with the NW-SE-oriented Laramide magmatic belt that extends across most of western Mexico. The geochemical composition and ages of representative rocks from the Mezcala mining district in central Guerrero are studied to evaluate the petrogenetic aspects of the ore-related magmas. Some major and trace elements display nearly linear silica variation trends, which suggest a possible comagmatic origin. However, other elements have scattered distributions, possibly due to irregular mantle-to-crust magma mixing ratios, heterogeneities in the composition of the assimilated crustal material, or modifications during the emplacement or postemplacement processes. Major element chemistry indicates calc-alkalic metaluminous compositions, whereas trace element data suggest a volcanic arc tectonic setting, confirming that these rocks evolved from magmas generated above a subduction zone. Compared with the Laramide granites from the northern part of the belt in northwestern Mexico, which intruded a crust underlain by Proterozoic North American rocks, the studied samples are similar but relatively low in Nb and high in Sr, the middle rare earth elements (REE), P, and Zr. They also display minor Ti enrichments and a moderate depletion in the heavy REE. These characteristics may indicate a source of basaltic composition. New Ar-40/Ar-39 dating of granodiorites and dacite porphyries shows a north-to-south age progression from 66.2 +/- 0.8 Ma in the northern part of the belt to 62.2 +/- 0.7 Ma in the south. Moreover, the argon dates identify a younger postorogenic igneous event 35-30 Ma ago. This event is poorly documented and may have occurred after the extinction of the Laramide arc and prior to the mid-Tertiary Sierra Madre Occidental ignimbrite flare-up. On the basis of limited geochemical data, these rocks appear to be depleted in P2O5 and Sr and enriched in U relative to the studied Laramide granites. A Fe skarn deposit located in Buena Vista de Cuellar, in the north central part of Guerrero, suggests that this magmatic pulse took place after the ore development of the Mezcala district. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Guerrero MH - Mexico|Sonora MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000189111100003 L2 - Fe skarn;gold;granitoids;guerrero;Laramide;southern Mexico;CORDILLERA; TERRANES; ARC SO - Journal of South American Earth Sciences 2003 ;16(4):205-217 8813 UI - 9053 AU - Meza-Figueroa D AU - Ruiz J AU - Talavera-Mendoza O AU - Ortega-Gutierrez F AD - Univ Sonora, Dept Geol, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Taxco, Guerrero, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoMeza-Figueroa, D, Univ Sonora, Dept Geol, Rosales & Blvd Encinas, Hermosillo 83000, Sonora, Mexico TI - Tectonometamorphic evolution of the Acatlan Complex eclogites (southern Mexico) AB - The Acatlan Complex of southern Mexico is linked to the evolution of the Appalachian-Caledonian chains and records C rents related to the Taconian, Acadian, and Alleghanian orogenies of northeastern North America. Mafic eclogites and garnet amphibolites from two selected localities are used to partially reconstruct the tectonometa-morphic evolution of this complex. Eclogites contain garnet (almandine) + Ca-Na pyroxene + phengitic mica + zoisite-clinozoisite + quartz +/- Ca-Na amphibole (barroisite, katophorite) +/- albitic plagioclase +/- rutile. Phase and textural relationships, thermobarometric determinations, and available radiometric ages indicate that eclogite-facies metamorphism took place during the Ordovician at temperatures around 560 +/- 60degreesC and pressures between 11 and 15 kbar (1 kbar = 100 MPa). Eclogites underwent widespread retrogression to epidote-amphibolite then greenschist facies during exhumation, most probably during Devonian times. Epidote-amphibolite facies include the critical assemblage calcic pyroxene + calcic amphibole (magnesiohornblende and pargasite) + muscovite + garnet + plagioclase + epidote +/- quartz. whereas greenschist facies is defined by the assemblage actinolite + albitic plagioclase + epidote + chlorite. Thermobarometric data suggest that retrogression occurred at temperatures between 510 +/- 20degreesC and 300 +/- 25degreesC and pressures ranging from 6 to 3.5 kbar, The obtained P-T (pressure-temperature) path suggest that the Acatlan Complex evolved in a more complex continental collisional setting. including intraoceanic arcs, than shown in previously proposed models MH - Mexico|Distrito Federal MH - Mexico|Guerrero MH - Mexico|Sonora MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0008-4077 UR - ISI:000181280000003 L2 - CONSISTENT THERMODYNAMIC DATASET; NEWFOUNDLAND APPALACHIANS; GARNET; TEMPERATURE; PLAGIOCLASE; SYSTEM; CLINOPYROXENE; PRESSURE; GEOTHERMOMETER; UNCERTAINTIES SO - Canadian Journal of Earth Sciences 2003 ;40(1):27-44 8814 UI - 7618 AU - Meza MM AU - Kopplin MJ AU - Gandolfi A AD - Inst Technol Sonora, Dept Res & Grad Studies, Obregon, Sonora, MexicoUniv Arizona, Tucson, AZ, USA TI - Arsenic drinking water exposure and urinary excretion among adults in the Yaqui Valley, Sonora, Mexico MH - Mexico|Sonora MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518500899 SO - Toxicological Sciences 2003 ;72():184-184 8815 UI - 7452 AU - Meza U AU - Bannister RA AU - Adams BA AD - Autonomous Univ San Luis Potosi, Dept Physiol & Pharmacol, Mexico City 78210, DF, MexicoUtah State Univ, Logan, UT 84322, USA TI - Differential modulation of Ca(v)2.3 splice-variants by neurokinin 1 receptor MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123802638 SO - Biophysical Journal 2003 ;84(2):537A-537A 8816 UI - 6424 AU - mezcua-Allieri MA AU - Lead JR AU - Melendez-Estrada J AU - Rodriguez-Vazquez R AD - Univ Birmingham, Sch Geog & Environm Sci, Birmingham B15 2TT, W Midlands, EnglandIPN, CINVESTAV, Dept Biotecnol & Bioingn, Mexico City 07360, DF, MexicoAmezcua-Allieri, MA, Univ Birmingham, Sch Geog & Environm Sci, Birmingham B15 2TT, W Midlands, England TI - Phenanthrene removal in a selected Mexican soil by the fungus Penicillium frequentans: Role of C : N ratio and water content AB - The purpose of this study was to determine the ability of the nonbasidiomycete, filamentous fungi Penicillium frequentans, isolated and grown on sugar cane bagasse pith, to remove phenanthrene in a solid-state culture. Additionally, the study investigated whether phenanthrene removal could be enhanced by manipulating the carbon-to-nitrogen ratio (C:N) and moisture content over a relatively short-term period (29 days). To evaluate the combined effect of moisture content and the C:N ratio, a combined experimental design, composed with a 22 factorial and both central and axial points, was used, It was shown that the moisture content (p < 0.0003) and the combined effect of moisture content and C:N ratio have a significant (p < 0.002) positive effect on the phenanthrene removal. It was also found that heterotrophic activity was not correlated to phenanthrene removal. An optimum phenanthrene removal efficiency of 74% was realized at a moisture content of 40% and a C:N ratio of 60. This suggests that Penicillium frequentans was able to effectively remove phenanthrene in a solid-state culture and that the combination of nutrient addition and moisture adjustment could enhance the phenanthrene removal activity MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences U5 - J;Article AV - English IS - 1532-0383 UR - ISI:000188232200006 L2 - solid-state culture;bioaugmentation;biostimulation;POLYCYCLIC AROMATIC-HYDROCARBONS; BIODEGRADATION; BI-7/2; CHRYSOSPORIUM; DEGRADATION; METABOLISM SO - Soil & Sediment Contamination 2003 ;12(3):387-399 8817 UI - 6479 AU - Michelitsch TM AU - Gao HJ AU - Levin VM AD - Max Planck Inst Met Res, Dept Theory Mesoscop Phenomena, D-70569 Stuttgart, GermanyInst Mexicano Petr, Mexico City 07730, DF, MexicoMichelitsch, TM, Max Planck Inst Met Res, Dept Theory Mesoscop Phenomena, Heisenbergstr 3, D-70569 Stuttgart, Germany TI - On the dynamic potentials of ellipsoidal shells AB - The solutions of many dynamical problems as wave propagation in electrodynamics, acoustics or elasticity very often require the solution of inhomogeneous Helmholtz equations (determination of dynamic potentials) for ellipsoidal source regions. As in the case of the static (Newtonian) potentials a compact representation of the dynamic potentials in terms of onedimensional integrals is highly desirable. Due to the mathematical complexity of the problem for ellipsoids such a representation seems not to have been reported in the literature so far. In this paper we close this gap for the dynamic potential of an ellipsoidal shell for internal spacepoints. The derived solution of the inside region can easily be used to find the solution for the outside region by applying Ivory's theorem. In the static limit classical results of Ferrers and Dyson for the Newtonian potential of inhomogeneous ellipsoids are reproduced MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mechanics U5 - J;Article AV - English IS - 0033-5614 UR - ISI:000187988500011 L2 - HETEROGENEOUS ELLIPSOIDS; ESHELBY TENSOR; ELASTIC FIELD; INCLUSION SO - Quarterly Journal of Mechanics and Applied Mathematics 2003 ;56():629-648 8818 UI - 8717 AU - Michener CD AU - Engel MS AU - Ayala R AD - Univ Kansas, Dept Ecol & Evolutionary Biol, Entomol Program, Lawrence, KS 66045, USAUniv Kansas, Nat Hist Museum, Div Entomol, Lawrence, KS 66045, USAUniv Nacl Autonoma Mexico, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoMichener, CD, Univ Kansas, Dept Ecol & Evolutionary Biol, Entomol Program, Snow Hall,1460 Jayhawk Blvd, Lawrence, KS 66045 USA TI - The bee genus Caupolicana in Central America (Hymenoptera : Colletidae) AB - The genus Caupolicana. subgenus Zikanapis is recorded from Guatemala, Costa Rica, and Panama: these are the first records for Central America. Caupolicana clypeata (Smith) previously recorded from Mexico is found in Guatemala. Caupolicana inbio. new species. is found in Costa Rica and Panama and C. rozenorum. new species. in Costa Rica MH - USA MH - Mexico|Jalisco PB - LAWRENCE: KANSAS ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0022-8567 UR - ISI:000182090400010 L2 - Caupolicana;Central America;Diphaglossinae;matinal bees;new species;Zikanapis SO - Journal of the Kansas Entomological Society 2003 ;76(2):160-171 8819 UI - 7370 AU - Mico E AU - Moron MA AU - Galante E AD - Univ Alicante, Ctr Iberoamer Biodiversidad, E-03080 Alicante, SpainInst Ecol, Dept Entomol, Xalapa 91000, Veracruz, MexicoMico, E, Univ Alicante, Ctr Iberoamer Biodiversidad, E-03080 Alicante, Spain TI - New larval descriptions and biology of some New World Anomalini beetles (Scarabaeidae : Rutelinae) AB - The third-instar larvae of four Anomala species: A. cincta Say, A. forreri Bates, A. sticticoptera Blanchard, and A. discoidalis Bates from Mexico are described and diagnostic characters of the species are illustrated. The third-instar of two Callistethus species: C. vidua (Newman) and C. cupricollis (Blanchard) from Mexico are also described and illustrated. The pupa of A. cincta is described. These six species are included in a key to the larvae of North American and Mexican Anomalini, which now includes four genera and 20 species. The use of larval morphology in the taxonomy of Anomalini is briefly discussed. Data on larval biology and life cycle of the six species are also provided MH - Mexico|Veracruz MH - Spain PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000185580100001 L2 - Anomalini;Anomala;Callistethus;larvae;morphology;larval biology SO - Annals of the Entomological Society of America 2003 ;96(5):597-614 8820 UI - 7911 AU - Miedema H AU - de Boer AH AU - Pantoja O AD - Biomade Technol Fdn, NL-9747 AG Groningen, NetherlandsUAEM, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoVrije Univ Amsterdam, Fac Biol, Dept Dev Genet, BioCentrum Amsterdam, NL-1091 HV Amsterdam, NetherlandsUNAM, Inst Biotecnol, Dept Biol Mol & Plantas, Cuernavaca 62250, Morelos, MexicoMiedema, H, Biomade Technol Fdn, Nijenborgh 4, NL-9747 AG Groningen, Netherlands TI - The gating kinetics of the slow vacuolar channel. A novel mechanism for SV channel functioning? AB - Although there is consensus that the slow vacuolar or SV channel is a Ca2+ release channel, the underlying mechanism of operation is still controversial. The main reason is that the voltage sensitivity of SV gating seems to exclude activation at hyperpolarized (physiological) membrane potentials. Inspired by a study of Gambale et al. (1993) and supported by simulation studies presented here, we interpreted SV activation and deactivation kinetics in terms of a cyclic state diagram originally applied to animal cation-selective channels. A cyclic state diagram allows two pathways of activation operating in opposite directions. One pathway represents the frequently observed slow activation at moderate depolarization (< 130 mV). With the open state (O) next to the closed state initially occupied (C-1), direct transitions from C-1 to O can account for the fast activation observed at higher depolarized potentials (>130 mV). We hypothesize that similar state transitions directly to O may also occur during hyperpolarization. The implication of this proposed mechanism is that SV accomplishes its physiological role during hyperpolarization-evoked deactivation. Despite their rare occurrence and possibly short duration, these opening events may last long enough to substantially raise the local cytosolic free Ca2+ level at the channel mouth by as much as 600 nM/ms. Because under in vivo conditions the Ca2+ flux is inwardly directed, the mechanism presented here revives the notion that the SV channel can be subject to calcium-induced calcium release MH - Mexico|Morelos MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Cell Biology;Physiology U5 - J;Article AV - English IS - 0022-2631 UR - ISI:000184184200002 L2 - SV channel;state diagram;gating kinetics;Ca2+ release;plant vacuole;INDUCED CALCIUM-RELEASE; DEPENDENT ION CHANNELS; GUARD-CELL VACUOLES; SQUID GIANT-AXON; PLANT VACUOLES; SINGLE-CHANNEL; CA2+ RELEASE; CURRENTS; RED SO - Journal of Membrane Biology 2003 ;194(1):11-20 8821 UI - 6779 AU - Mielke EW AU - Maggiolo AAR AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Zulia, Fac Ciencias, Dept Fis, Maracaibo 4011, VenezuelaMielke, EW, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico TI - Rotating black hole solution in a generalized topological 3D gravity with torsion AB - A first order version of topological massive gravity is achieved by liberating its translational gauge degrees of freedom. In three dimensions, our Lagrangian consists of Chern-Simons (CS) terms for curvature and torsion inducing an effective cosmological constant dynamically, whereas a "mixed" CS term is substituting for the topological related Einstein-Cartan action. Anti-de Sitter and rotating black hole configurations are exact vacuum solutions. They also apply to a large class of Yang-Mills-type generalizations including "exotic" terms exclusively permitted in 3D. The reason for this can be partially traced back to a new strong/weak duality of the translational and rotational dynamical degrees of freedom MH - Mexico|Distrito Federal MH - Venezuela PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000187004600058 L2 - MASSIVE GAUGE-THEORIES; 2+1 DIMENSIONAL GRAVITY; CHERN-SIMONS ACTION; AFFINE SPACE-TIME; NOETHER IDENTITIES; SUPERGRAVITY; EQUATIONS; DYNAMICS; INVARIANCE; PARTICLES SO - Physical Review D 2003 ;68(10): 8822 UI - 8828 AU - Mielke EW AU - Maggiolo AAR AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Zulia, Fac Ciencias, Dept Fis, Maracaibo 4011, VenezuelaMielke, EW, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico TI - Algebra for a BRST quantization of metric-affine gravity AB - For a general gauge-theoretical formulation of gravitational interactions, we analyze the first algebraic steps towards a quantization via BRST ghost operators, replacing the Lagrange multipliers of the classical Hamiltonian constraints. From the nilpotency of the BRST charge, we deduce new restrictions on torsion and curvature of Yang-Mills type metric-affine models MH - Mexico|Distrito Federal MH - Venezuela PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000181858000003 L2 - torsion;Yang-Mills equation;metric-affine gravity;POINCARE GAUGE-THEORY; FIELD-THEORY; TELEPARALLELISM EQUIVALENT; GENERAL-RELATIVITY; TORSION; CONSTRAINTS; SYMMETRY; INVARIANCE; VARIABLES; EQUATIONS SO - General Relativity and Gravitation 2003 ;35(5):771-789 8823 UI - 7176 AU - Mikumo T AU - Yagi Y AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoInt Inst Seismol & Earthquake Engn, Bldg Res Inst, Tsukuba, Ibaraki 3050802, JapanMikumo, T, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Slip-weakening distance in dynamic rupture of in-slab normal-faulting earthquakes AB - We estimate the critical slip-weakening distance on in-slab earthquake faults in a subduction zone, by applying a recent approach proposed by us. This approach is to find a relation between the breakdown time of shear stress T-b, the time of peak slip velocity T-pv, and the slip-weakening distance D-c from the time histories of shear stress, slip and slip velocity at each point on the fault. The previous results show that D-c at T-b can be well approximated by D-c' at T-pv for faults even with a heterogeneous stress drop distribution, except at locations near barriers and fault edges. We apply the above method to three large in-slab, normal-faulting earthquakes in the Mexican subduction zone. To do this, we calculate the spatial distribution of slip-velocity functions and final slip from kinematic waveform inversion of strong-motion and teleseismic records, and the stress history and final stress change from dynamic rupture calculations. By integrating the slip-velocity functions obtained from the inversion, from the rupture arrival time to the time of peak slip velocity, we obtain slip D-c' at T-pv and then correct it for D-c at T-b through dynamic calculations. We also estimate the lowest resolvable limit and probable errors of D-c from the slip-velocity functions, and its upper bound from a theoretical constraint between the dynamic stress drop and D-c. We found that the slip-weakening distance D-c estimated in the frequency band between 0.05 and 0.5 Hz ranges between 40 and 120 cm on the in-slab fault of the 1999 Oaxaca earthquake (M-w = 7.5). The largest D-c is detected in the central fault and in part of the deeper sections, and D-c in the zone around the hypocentre ranges between 50 and 70 cm. The estimated D-c values appear to be less depth-dependent but are rather more dependent on the local maximum slip. This possible slip dependence might be interpreted by the degree of fault roughness, in addition to stress heterogeneities. The fracture energy G in the central section and in the hypocentral zone are roughly estimated to be of the order of 10-15 and 5-8 MJ m(-2), respectively. Both of the estimated D-c and G values are somewhat larger than those on the vertical fault of two recent, shallow strike-slip earthquakes in western Japan MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000186173500009 L2 - dynamic rupture;in-slab faults;normal-faulting earthquakes;slip-weakening;MEXICAN SUBDUCTION ZONE; STRONG-MOTION DATA; CONSTITUTIVE RELATIONS; TECTONIC IMPLICATIONS; SHEAR FAILURE; FRICTION LAW; COCOS PLATE; STRESS; NUCLEATION; PARAMETERS SO - Geophysical Journal International 2003 ;155(2):443-455 8824 UI - 8833 AU - Mikumo T AU - Olsen KB AU - Fukuyama E AU - Yagi Y AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Calif Santa Barbara, Inst Crustal Studies, Santa Barbara, CA 93106, USANatl Res Inst Earth Sci & Disaster Prevent, Tsukuba, Ibaraki 3050006, JapanUniv Tokyo, Earthquake Res Inst, Tokyo 1130032, JapanMikumo, T, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Stress-breakdown time and slip-weakening distance inferred from slip-velocity functions on earthquake faults AB - We estimate the critical slip-weakening distance on earthquake faults by using a new approach, which is independent of the estimate of fracture energy or radiated seismic energy. The approach is to find a physically based relation between the breakdown time of shear stress T-b, the time of peak slip-velocity T-pv, and the slip-weakening distance De, from the time histories of shear stress, slip, and slip velocity at each point on the fault, which can be obtained from dynamic rupture calculations using a simple slip-weakening friction law. Numerical calculations are carried out for a dynamic shear crack propagating either spontaneously or at a fixed rupture velocity on a vertical fault located in a 31) half-space and a more realistic horizontally layered structure, with finite-difference schemes. The results show that T-pv is well correlated with T-b for faults even with a heterogeneous stress-drop distribution, except at locations near strong barriers and the fault edges. We also investigate this relation for different types of slip-weakening behavior. We have applied the method to two recent, strike-slip earthquakes in western Japan, the 2000 Tottori and the 1995 Kobe events. We integrated the slip-velocity functions on the vertical fault obtained from kinematic waveform inversion of strong-motion and teleseismic records from the arrival time of rupture T-r to the time of the peak-slip velocity T-pv and we then corrected the slip obtained at T-pv for the errors expected from the dynamic calculations. It was found that the slip-weakening distance De estimated in the frequency window between 0.05 and 0.5 Hz ranges between 40 and 90 cm on the two earthquake faults. However, if we consider the limited frequency resolution of the observed waveforms, probable time errors in the slip-velocity functions obtained from kinematic inversion, and the uncertainty of the slip-weakening behavior, the above estimates may be those located between the minimum resolvable limit and the upper bound of their real values. The estimated D-c values do not necessarily seem to indicate larger values in the shallower part and smaller values in the deeper part of the fault, but rather a spatially heterogeneous distribution that appears to be dependent on the local maximum slip. This possible dependence might be interpreted by the frictional properties of the fault such as the degree of roughness or the thickness of gouge layers, in addition to stress heterogeneities MH - Japan MH - Mexico|Distrito Federal MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 31 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000181971700019 L2 - 1992 LANDERS EARTHQUAKE; 3D ELASTIC MEDIUM; 1984 MORGAN-HILL; DYNAMIC RUPTURE; 3-DIMENSIONAL SIMULATION; ROCK FRICTION; CONSTITUTIVE RELATIONS; HETEROGENEOUS FAULT; SHEAR RUPTURE; PLANAR FAULT SO - Bulletin of the Seismological Society of America 2003 ;93(1):264-282 8825 UI - 6822 AU - Milan Z AU - Villa P AU - Sanchez E AU - Montalvo S AU - Borja R AU - Ilangovan K AU - Briones R AD - CIPIMM, Boyeros 12028, CubaCSIC, Inst Grasa, Seville 41012, SpainNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoMilan, Z, CIPIMM, Cattetera Varona, Boyeros 12028, Cuba TI - Effect of natural and modified zeolite addition on anaerobic digestion of piggery waste AB - The effect of natural and modified zeolites on the anaerobic degradation of acetate and methanol was evaluated by the determination of specific methane productivity (SMP) in batch minidigesters of 50 mL at doses of 0.01, 0.05 and 0.1 g of zeolite/g of VSS. The effects of the different zeolite concentrations were determined by the results of the SMP. A kinetic characterization with data of accumulated methane gas volume was also carried out. In the second phase of the study, the effects of natural and nickel zeolite concentrations were tested with piggery waste in laboratory scale digesters of 2.5 L operating at semi continuous mode, by increasing the organic load applied from 0.2 to 22.0 g TCOD/d corresponding to organic loading rates (OLR) of 0.1-8.8 g TCOD/I.d. A greater effect of modified zeolite on SMP was observed, with an increase of 8.5 times with magnesium zeolite, 4.4 times with cobalt zeolite and 2.8 times with nickel zeolite. Two phases were defined in the kinetic study and an increase of more than 2 times the apparent constant of digesters with modified zeolites was observed in the second phase when compared to unmodified natural zeolite. Modified natural zeolite addition to digesters can allow an increase in the potential biodegradability of piggery waste solid fraction and/or a considerable reduction of digestion volume MH - Cuba MH - Mexico|Distrito Federal MH - Spain PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000186741700036 L2 - natural and modified zeolite;piggery waste;specific methane productivity (SMP);CATTLE MANURE; COW MANURE; EXCHANGE; REMOVAL SO - Water Science and Technology 2003 ;48(6):263-269 8826 UI - 7137 AU - Miller P AU - Brody CD AU - Romo R AU - Wang XJ AD - Brandeis Univ, Volen Ctr Complex Syst, Waltham, MA 02454, USACold Spring Harbor Lab, Cold Spring Harbor, NY 11724, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoWang, XJ, Brandeis Univ, Volen Ctr Complex Syst, 415 South St, Waltham, MA 02454 USA TI - A recurrent network model of somatosensory parametric working memory in the prefrontal cortex AB - A parametric working memory network stores the information of an analog stimulus in the form of persistent neural activity that is monotonically tuned to the stimulus. The family of persistent firing patterns with a continuous range of firing rates must all be realizable under exactly the same external conditions (during the delay when the transient stimulus is withdrawn). How this can be accomplished by neural mechanisms remains an unresolved question. Here we present a recurrent cortical network model of irregularly spiking neurons that was designed to simulate a somatosensory working memory experiment with behaving monkeys. Our model reproduces the observed positively and negatively monotonic persistent activity, and heterogeneous tuning curves of memory activity. We show that fine-tuning mathematically corresponds to a precise alignment of cusps in the bifurcation diagram of the network. Moreover, we show that the fine-tuned network can integrate stimulus inputs over several seconds. Assuming that such time integration occurs in neural populations downstream from a tonically persistent neural population, our model is able to account for the slow ramping-up and ramping-down behaviors of neurons observed in prefrontal cortex MH - USA MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 33 U4 - Neurosciences U5 - J;Article AV - English IS - 1047-3211 UR - ISI:000186180000009 L2 - SHORT-TERM PLASTICITY; PERSISTENT ACTIVITY; EXCITATORY SYNAPSES; NEURAL INTEGRATOR; EYE-POSITION; NEURONS; STABILITY; MONKEYS SO - Cerebral Cortex 2003 ;13(11):1208-1218 8827 UI - 8593 AU - Milner RJ AU - Lozano LB AU - Driver F AU - Hunter D AD - CSIRO Entomol, Canberra, ACT 2610, AustraliaInst Technol Cd Victoria, Cd Victoria 87018, Tam, MexicoAgr Forestry & Fisheries Australia, Australian Plague Locust Commiss, Canberra, ACT 2601, AustraliaMilner, RJ, CSIRO Entomol, GPO Box 1700, Canberra, ACT 2610, Australia TI - A comparative study of two Mexican isolates with an Australian isolate of Metarhizium anisopliae var. acridum - strain characterisation, temperature profile and virulence for wingless grasshopper, Phaulacridium vittatum AB - Three isolates of Metarhizium anisopliae var. acridum, FI-985, from the spur-throated locust, Austracris guttulosa from Australia, and QF-01 and QF-02 both from Schistocerca piceifrons in Mexico were compared. FI-985 had much larger conidia than the other two isolates and also had a different colony appearance. The two Mexican isolates showed small differences in conidial size and colony morphology. Over a range of 6 primers, RAPDs patterns were very similar in that the two Mexican isolates being identical, and FI-985 having some unique bands only with 2 primers. The 3 isolates were also similar in growth profiles on agar plates, and at high temperatures (36degreesC), QF-01 did not grow while the other two isolates grew slowly. All three isolates were similar in virulence for wingless grasshoppers, Phaulacridium vittatum, at 20-30 degreesC but at 35 degreesC, FI-985 was the most virulent and QF-01 the least over a range of 3 doses. At 15 degreesC, FI-985 was also the most virulent with QF-02 being least virulent. At 30 degreesC, the LD50 at 17 days ranged from 248 conidia for QF-02 to 501 conidia for FI-985, however the differences were not significant (p > 0.05). It is suggested that consideration should be given to using an exotic isolate such as FI-985 as a commercial locust biopesticide in countries such as Mexico, since the isolate is cheap to mass produce, more effective at higher temperatures common in tropical to subtropical Mexico, and relatively resistant to UV MH - Australia MH - Mexico|Tamaulipas PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 1386-6141 UR - ISI:000182608200007 L2 - bioassay;grasshoppers;inundative biological control;locusts;Metarhizium anisopliae var. acridum;microbial control;Phaulacridium vittatum;Schistocerca piceifrons;temperature;SCHISTOCERCA-GREGARIA; LOCUSTA-MIGRATORIA; AERIAL TREATMENT; DEUTEROMYCOTINA; SUSCEPTIBILITY; FLAVOVIRIDE; ORTHOPTERA; ACRIDIDAE SO - Biocontrol 2003 ;48(3):335-348 8828 UI - 9004 AU - Milutinovic V AU - Skundric N AD - Univ Belgrade, YU-11001 Belgrade, YugoslaviaFraunhofer IPSI, Darmstadt, GermanyUniv Appl Studies, Belgrade, YugoslaviaITESM, Monterrey, MexicoUniv Munich, Munich, GermanyMilutinovic, V, Univ Belgrade, YU-11001 Belgrade, Yugoslavia TI - Will distance learning create a global university? MH - Germany MH - Mexico|Nuevo Leon MH - Yugoslavia PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Hardware & Architecture;Computer Science, Software Engineering U5 - J;Editorial Material AV - English IS - 0018-9162 UR - ISI:000181440900030 SO - Computer 2003 ;36(3):100-+ 8829 UI - 8683 AU - Mimila-Arroyo J AU - Cabrera V AU - Bland SW AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoIQE Europe Ltd, Cardiff CF3 0EG, S Glam, WalesMimila-Arroyo, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, AP 14-740, Mexico City 07000, DF, Mexico TI - Dependence of burn-in effect on thermal annealing of the GaAs : C base layer in GaInP heterojunction bipolar transistors AB - We investigate in situ thermal annealing of the carbon-doped GaAs base layer in GaInP/GaAs heterojunction bipolar transistors grown by metalorganic chemical vapor deposition in order to eliminate hydrogen incorporation. The influence of the anneal on the carrier transport properties and on the burn-in effect is studied. Results show that the anneal reduces the burn-in effect due to an increase in the emitter minority carrier diffusion length which is caused by passivation of H+ recombination centers in the GaInP emitter layer. However, the anneal also degrades the base minority carrier diffusion length leading to a reduction in the current gain. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000182399700055 L2 - CARBON REACTIVATION KINETICS SO - Applied Physics Letters 2003 ;82(17):2910-2912 8830 UI - 8600 AU - minguez-Ortega L AU - Salin-Pascual RJ AU - az-Gallego E AD - Clin Ludor, Unidad Sueno, Madrid 28001, SpainHosp 12 Octubre, Serv Med Interna, Unidad Sueno, Madrid, SpainUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City, DF, MexicoDiminguez-Ortega, L, Clin Ludor, Unidad Sueno, C Principe de Vergara 31,1 Dcha, Madrid 28001, Spain TI - Narcolepsy-like symptoms in a patient with Down syndrome and without obstructive sleep apnea AB - Objective: The study reports on a 33-year-old Caucasian female with Down syndrome and narcolepsy-like symptoms. Method: After medical and genetic screening, nocturnal polysomnography followed by a Multiple Sleep Latency Test and HLA typing were performed. The patient was medication free and reported a number of cataplexy attacks everyday. Each time that she came to the sleep disorders clinic, she was observed to have cataplexy. She also felt extremely drowsy. A mean sleep latency of 8.8 minutes with 4 sleep-onset rapid eye movement periods in the Multiple Sleep Latency Test, with no other sleep disorder that accounts for the symptoms, was obtained. The patient was DQB1*0301, DQB1"0602, as revealed by the last high-resolution serologic typing MH - Mexico|Distrito Federal MH - Spain PB - ROCHESTER: AMER ACAD SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0161-8105 UR - ISI:000182439100009 L2 - narcolepsy;Down syndrome;rapid eye movement sleep;sleep;UPPER AIRWAY-OBSTRUCTION SO - Sleep 2003 ;26(3):285-286 8831 UI - 9769 AU - Minzoni AA AU - Smyth NF AU - Worthy AL AD - Univ Edinburgh, Dept Math & Stat, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Nacl Autonoma Mexico, IIMAS, FENOMEC, Dept Mat & Mech, Mexico City 01000, DF, MexicoUniv Wollongong, Sch Math & Appl Stat, Wollongong, NSW 2522, AustraliaSmyth, NF, Univ Edinburgh, Dept Math & Stat, Kings Bldg,Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland TI - Radiation from a cut-off point in a two layer nonlinear TE mode waveguide AB - In this work, the propagation of a nonlinear transverse electric (TE) mode in an optical two layer waveguide is considered for the case in which the layers are slowly varying. For a semi-infinite straight boundary between the layers, it is known that trapped modes exist which travel close to the interface. In the present work the upper layer light channel is taken to be of finite extent, while the lower layer is taken to be semi-infinite. The lateral stratification causes trapped modes to cut-off, so that energy is then beamed into the lower layer. In the present work a canonical nonlinear Schrodinger (NLS) equation is obtained which describes, together with an appropriate boundary condition, the radiation beamed into the lower light channel (material layer). It is found from numerical solutions that the radiating mode in the lower layer propagates as a soliton. Approximate solutions for this radiation are found using two methods. The first assumes that the radiating mode is a soliton whose amplitude and width are constant, but whose velocity can vary. The equation governing the soliton velocity is derived using conservation of energy. The second method allows the amplitude, width and velocity all to vary and the equations governing these parameters are obtained from an averaged Lagrangian for the NLS equation. Solutions obtained from the second approximate method are in much better agreement with numerical solutions since the amplitude of the soliton undergoes significant variation in the lower layer (light channel). Since the equation is canonical, it is apparent that nonlinearity induces coherent propagation in the wave radiated into the lower layer (light channel). (C) 2003 Elsevier Science B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Acoustics;Mechanics;Physics, Multidisciplinary U5 - J;Article AV - English IS - 0165-2125 UR - ISI:000179352500003 L2 - NON-LINEAR INTERFACE; WAVE-GUIDES; PROPAGATION; BEAMS; REFLECTION; BOTTOM; FIBERS SO - Wave Motion 2003 ;37(1):25-42 8832 UI - 8592 AU - Mioc V AU - Perez-Chavela E AU - Stavinschi M AD - Romanian Acad, Astron Inst, RO-75212 Bucharest, RomaniaUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoMioc, V, Romanian Acad, Astron Inst, Str Cutitul de Argint 5, RO-75212 Bucharest, Romania TI - The anisotropic Schwarzschild-type problem, main features AB - The two-body problem associated to an anisotropic Schwarzschild-type field is being tackled. Both the motion equations and the energy integral are regularized via McGehee-type transformations. The regular vector field exhibits nice symmetries that form a commutative group endowed with an idempotent structure. The physically fictitious flows on the collision and infinity manifolds, as well as the local flows in the neighbourhood of these manifolds, are fully described. Homothetic, spiral, and oscillatory orbits are pointed out. Some features of the global flow are depicted for all possible levels of energy. For the negative-energy case, few things have been done. The positive-energy global flow does not have zero-velocity curves; every orbit is of the type ejection escape or capture - collision. In the zero-energy case, the collision and infinity manifolds have a very similar structure. The existence of eight trajectories that connect the equilibria on these manifolds is proved. The projectability of the zero-energy global flow completes the full understanding of the problem in this case MH - Mexico|Distrito Federal MH - Romania PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0923-2958 UR - ISI:000182661900004 L2 - Schwarzschild-type problems;nonlinear particle dynamics;phase-space structure;GRAVITATIONAL-FIELD; KEPLER PROBLEM; 2-BODY PROBLEM; MANEV PROBLEM; ORBITS SO - Celestial Mechanics & Dynamical Astronomy 2003 ;86(1):81-106 8833 UI - 8034 AU - Miranda-Hernandez M AU - Ayala J AU - Rincon E AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoColumbian Chem Co, Marietta, GA 30062, USARincon, E, UNAM, Ctr Invest Energia, Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Electrochemical storage of hydrogen in nanocarbon materials: electrochemical characterization of carbon black matrices AB - In this work, various types of carbon black are electrochemically characterized to study their possible use in the electrochemical evaluation of fullerene materials as hydrogen storage candidates. The cyclic voltammetry and chronopotentiometry studies were performed in alkaline media, 6 M KOH, with carbon paste electrodes. Differences in the electrodes' electrochemical response and their correlation with the various surface chemistries, morphology and doping species of carbon blacks suggest a stronger dependency on the presence of doping agents (foreign metals) and on the surface structure than on the carbon black surface area. The study allows the selection of appropriate carbon black materials to be used as matrixes in future fullerene composite studies MH - Mexico|Morelos MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Electrochemistry U5 - J;Article AV - English IS - 1432-8488 UR - ISI:000183831000005 L2 - carbon black;carbon paste;cyclic voltammetry;hydrogen storage;ALKALINE-SOLUTION; EVOLUTION REACTION; ALLOY ELECTRODES; ENERGY-STORAGE; PART II; NANOTUBES; KINETICS; NICKEL; ADSORPTION; IMPEDANCE SO - Journal of Solid State Electrochemistry 2003 ;7(5):264-270 8834 UI - 8035 AU - Miranda-Hernandez M AU - Ayala J AU - Rincon E AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoColumbian Chem Co, Marietta, GA 30062, USARincon, E, UNAM, Ctr Invest Energia, Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Effect of surface structure on the charge storage capacity of carbon black electrodes AB - In this work we study the effect of surface structure on the charge storage capacity of carbon black electrodes with various changes in surface chemistry, morphology, and doping species. Cyclic voltammetry and chronopotentiometry studies, performed under alkaline conditions with carbon paste electrodes, indicate the importance of surface structure and grain size on the faradic and capacitive charge contributions of these materials. Among the various carbon blacks studied, the lithiated material shows superior charge storage capacity, suggesting the importance of alkaline metals and oxygenated groups on the carbon surface. For the graphitic carbon, the appearance of a reversible redox process with cycling resembles the electrochemical behavior reported for hydrogen storage in carbon nanotubes MH - Mexico|Morelos MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Electrochemistry U5 - J;Article AV - English IS - 1432-8488 UR - ISI:000183831000006 L2 - electrochemical capacitor;carbon black;carbon paste;DOUBLE-LAYER CAPACITORS; ELECTROCHEMICAL CAPACITORS; ACTIVATED CARBONS; ENERGY-STORAGE; NANOTUBES; SUPERCAPACITORS; ELECTROLYTES; PERFORMANCE; RUO2 SO - Journal of Solid State Electrochemistry 2003 ;7(5):271-276 8835 UI - 7343 AU - Miranda-Tello E AU - Fardeau ML AU - Sepulveda J AU - Fernandez L AU - Cayol JL AU - Thomas P AU - Ollivier B AD - Univ Prov & Mediterranee, IFR BAIM, IRD, UR Extremophiles 101, F-13288 Marseille 09, FranceUniv Autonoma Metropolitana, Ctr Nacl Invest & Capacitac Ambiental, CENICA, Lab Microscopia Elect, Mexico City, DF, MexicoInst Mexicano Petr, Programa Biotecnol Petr, Mexico City 07730, DF, MexicoOllivier, B, Univ Prov & Mediterranee, IFR BAIM, IRD, UR Extremophiles 101, ESIL Case 925,163 Ave Luminy, F-13288 Marseille 09, France TI - Garciella nitratireducens gen. nov., sp nov., an anaerobic, thermophilic, nitrate- and thiosulfate-reducing bacterium isolated from an oilfield separator in the Gulf of Mexico AB - A novel Gram-positive, anaerobic and thermophilic bacterium, strain MET79(T), was isolated from an oil well located in the Gulf of Mexico. Cells were straight rods, motile by a subpolar flagellum. Spores were formed in old cultures. Inner gas vacuoles swelled the cells when exposed to air. The optimum growth conditions were 55 degreesC, pH 7.5 and 1 % NaCl. Yeast extract was required for growth. Strain MET79(T) fermented several sugars, some organic acids and Casamino acids. Glucose was fermented into lactate, acetate, butyrate, H-2 and CO2. Strain MET79(T) reduced thiosulfate to hydrogen sulfide and nitrate to ammonium. The DNA G+C; content was 30.9 mol%. The closest phylogenetic relative of strain MET79(T) was Caloranaerobacter azorensis (88.7 % 16S rDNA sequence similarity). As strain MET79(T) (=DSM 15102(T)=CIP 107615(T)) was physiologically and phylogenetically different from its closest relatives, it is assigned as the type strain of a novel species of a new genus, Garciella nitratireducens gen. nov., sp. nov MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000185551100042 L2 - SULFIDE-OXIDIZING BACTERIA; WELL; RESERVOIR; WATER SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():1509-1514 8836 UI - 7945 AU - Miranda-Tello E AU - Fardeau ML AU - Fernandez L AU - Ramirez F AU - Cayol JL AU - Thomas P AU - Garcia JL AU - Ollivier B AD - Univ Aix Marseille 1, Microbiol Lab, IRD, IFR BAIM,ESIL, F-13288 Marseille 09, FranceUniv Mediterranee, Microbiol Lab, IRD, IFR BAIM,ESIL, F-13288 Marseille, FranceInst Mexicano Petr, Programa Biotecnol Petroleo, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana, Lab Tratamiento Aguas Residuales, Mexico City, DF, MexicoOllivier, B, Univ Aix Marseille 1, Microbiol Lab, IRD, IFR BAIM,ESIL, UR 101 Extremophiles,Case 925,163 Ave Luminy, F-13288 Marseille 09, France TI - Desulfovibrio capillatus sp nov., a novel sulfate-reducing bacterium isolated from an oil field separator located in the Gulf of Mexico AB - A new spirilloid sulfate-reducing bacterium designated strain MET2(T) (T type strain), was isolated from a Mexican oil field separator. Electron microscopy revealed a Gram-negative cell wall consisting of a 150 nm thick undulating outer membrane. Strain MET2(T) appeared singly or in long chains and was actively motile with a corkscrew-like motion. The isolate grew optimally at 40degreesC, pH 7.4 and 3% NaCl in a medium containing lactate, thiosulfate and yeast extract. Sulfate, sulfite, thiosulfate, and elemental sulfur served as electron acceptors but not nitrate or fumarate. Lactate, pyruvate and H (with acetate as carbon source) were used as electron donors. Pyruvate was fermented. Desulfoviridin and cyt c were present. The G+C content of the DNA was 58.7 mol%. Phylogenetic analysis based on 16S rDNA sequencing showed that strain MET2(T) was a member of the genus Desulfovibrio, with "D. gracilis" and D. longus being its closest relatives (similarities of 98.3% and 97.1%, respectively). However, DNA-DNA hybridization studies indicated poor homologies (values <70%) with both species. On the basis of genotypic, phenotypic, and phylogenetic characteristics. strain MET2(T) (= DSM 14982(T) CIP107483(T)) is proposed as the type strain of a new species, Desulovibrio capillatus sp. nov. GenBank accession number for the 16S rDNA sequence for MET2(T) is AY 176773. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Microbiology U5 - J;Article AV - English IS - 1075-9964 UR - ISI:000184188600008 L2 - desulfovibrio capillatus;sulfate-reducing bacterium;oil well;taxonomy;NORTH-SEA; WASTE-WATER; THIOSULFATE; WELL; RESERVOIRS; COMMUNITIES; REDUCERS SO - Anaerobe 2003 ;9(2):97-103 8837 UI - 9173 AU - Miranda-Valenzuela JC AU - Muci-Kuchler KH AU - Soriano-Soriano S AD - S Dakota Sch Mines & Technol, Napid City, SD, USAProlec GE, Power Div, Apodaca 66600, NL, MexicoMiranda-Valenzuela, JC, ITESM Campus Toluca, Toluca 50110, Mexico TI - Efficient computation of boundary stresses and error indicators in two-dimensional thermoelasticity AB - In this paper the tangent derivative boundary integral equations (TDBIEs) are used to implement an efficient formulation for the computation of stresses and error indicators in two-dimensional, steady-state, thermoelastic problems. The basis for this work is a global reanalysis technique in which, as a post-processing activity, the functional representation for the displacements is changed from Lagrangian to Hermite. The new unknowns introduced in the model, namely the tangential derivatives of the displacements, are obtained by solving a second system of equations generated by collocating the TDBIEs at the functional nodes of the Lagrangian elements. This approach provides more accurate values for the boundary stresses due to the improved functional representation used for the displacements. Also, once the new values for stresses have been obtained using the global reanalysis technique, the difference between them and the ones corresponding to the original solution with Lagrangian elements is used to obtain an efficient error indicator suitable for leading adaptive processes. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0955-7997 UR - ISI:000180996900009 L2 - adaptive meshing;error estimation;hypersingular equations;stress computation;global reanalysis;ELEMENT METHOD; INTEGRAL-EQUATIONS; MESH REFINEMENT; FORMULATION; DISPLACEMENT; ELASTICITY SO - Engineering Analysis with Boundary Elements 2003 ;27(2):159-173 8838 UI - 7090 AU - Miranda MI AU - LaLumiere RT AU - Buen TV AU - Bermudez-Rattoni F AU - McGaugh JL AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Calif Irvine, Ctr Neurobiol Learning & Memory, Irvine, CA 92697, USAUniv Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697, USAMiranda, MI, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Apartado Postal 70-253, Mexico City 04510, DF, Mexico TI - Blockade of noradrenergic receptors in the basolateral amygdala impairs taste memory AB - In conditioned taste aversion (CTA), a subject learns to associate a novel taste (conditioned stimulus, CS) with visceral malaise (unconditioned stimulus, US). Considerable evidence indicates that the noradrenergic system in the amygdala plays an important role in memory consolidation for emotionally arousing experiences. The specific aim of the present set of experiments was to determine the involvement of noradrenergic activity in the basolateral amygdala (BLA) during the US presentation and consolidation of CTA as well as during the consolidation of a nonaversive/incidental gustatory memory. Selective bilateral microinfusions of the beta-adrenergic antagonist propranolol administered into the BLA immediately before intraperitoneal (i.p.) lithium chloride (LiCl) injections disrupted CTA memory. Additionally, propranolol infused into the BLA immediately after a pre-exposure to the saccharin (CS) significantly attenuated latent inhibition. The present findings indicating that alterations in noradrenergic function in the BLA affect taste memory formation, provide additional evidence that the BLA plays a critical role in modulating the consolidation of memory and that the influence is mediated by interactions with other brain regions that support memory for different kinds of experiences MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 21 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000186387200021 L2 - conditioned taste aversion;latent inhibition;incidental learning;propranolol;norepinephrine;consolidation;NUCLEUS BASALIS MAGNOCELLULARIS; LONG-TERM POTENTIATION; INSULAR CORTEX; INHIBITORY AVOIDANCE; ENHANCES RETENTION; LATENT INHIBITION; IBOTENIC ACID; AVERSION; LESIONS; RAT SO - European Journal of Neuroscience 2003 ;18(9):2605-2610 8839 UI - 7286 AU - Miranda MI AU - Ferreira G AU - Ramirez-Lugo L AU - Bermudez-Rattoni F AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoUniv Tours, Lab Comportement Anim, UMR 6073, INRA,CNRS, F-37380 Nouzilly, FranceBermudez-Rattoni, F, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Neurociencias, AP 70-253 Cd, Mexico City 04510, DF, Mexico TI - Role of cholinergic system on the construction of memories: Taste memory encoding AB - There is a large body of evidence suggesting that cholinergic activity is involved in memory processes. it seems that cholinergic activity is essential to learn several tasks and recent works suggest that acetylcholine plays an important role during the early stages of memory formation. In this review, we will discuss the results related to taste memory formation, focusing particularly on the conditioned taste aversion paradigm. We will first give evidence that nucleus basalis magnocellularis is involved in taste memory formation, due to its cholinergic projections. We then show that the cholinergic activity of the insular (gustatory) Cortex is related to the taste novelty, and that the cholinergic signals initiated by novelty are crucial for taste memory formation. Then we present recent data indicating that cortical activation of muscarinic receptors is necessary for taste trace encoding, and also for its consolidation under certain circumstances. Finally, interactions between the cholinergic and other neuromodulatory systems inducing intracellular mechanisms related to plastic changes will be proposed as important processes underlying gustatory memory trace storage. (C) 2003 Elsevier Science (USA). All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Behavioral Sciences;Neurosciences;Psychology;Psychology, Multidisciplinary U5 - J;Article AV - English IS - 1074-7427 UR - ISI:000185841000004 L2 - acetylcholine;amygdala;conditioned taste aversion;gustatory learning;insular cortex;memory trace;muscarinic receptor;neophobia;NMDA receptor;novelty;scopolamine;NUCLEUS BASALIS MAGNOCELLULARIS; LONG-TERM POTENTIATION; RAT INSULAR CORTEX; CORTICAL ACETYLCHOLINE-RELEASE; DOPAMINE D1 RECEPTORS; IN-VIVO; AVERSION MEMORY; TYROSINE PHOSPHORYLATION; NMDA RECEPTORS; HIPPOCAMPAL ACETYLCHOLINE SO - Neurobiology of Learning and Memory 2003 ;80(3):211-222 8840 UI - 6795 AU - Mironov SV AU - Perez TM AD - Russian Acad Sci, Inst Zool, St Petersburg 199034, RussiaUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoMironov, SV, Russian Acad Sci, Inst Zool, Univ Skaya Embankment 1, St Petersburg 199034, Russia TI - Micropsittophagus n. gen., a new feather mite genus (Astigmata : Pterolichidae) from the green pygmy parrot, Micropsitta finschi (Psittaciformes : Psittacidae) AB - A new feather mite, Micropsittophagus atyeoi n. gen., n. sp., belonging to the Psittophagus generic group of the subfamily Pterolichinae (Pterolicholdea: Pterolichidae), is described from the green pygmy parrot, Micropsitta finschi (Ramsay, 1881) (Psittacidae: Psittacinae). This is the first description of a pterolichine from pygmy parrots, the tribe Micropsittini. In comparison to other known genera of the Psittophagus group (Nymphicilichus, Psittaculobius and Psittophagus) the new genus is characterized by several archaic features. In both sexes of the genus Micropsittophagus, the internal vertical setae are present; in the females, the pair of subtegumental sclerotized structures in the sejugal region is rudimentary and the pair in the opisthosomal region is absent MH - Mexico|Distrito Federal MH - Russia PB - WEST BLOOMFIELD: INDIRA PUBLISHING HOUSE RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0164-7954 UR - ISI:000186993300009 L2 - Acari;Pterolichidae;feather mites;parrot mites;Solomon Islands SO - International Journal of Acarology 2003 ;29(4):371-375 8841 UI - 7988 AU - Mishra A AU - Newkome GR AU - Moorefield CN AU - Godinez LA AD - Univ Akron, Dept Polymer Sci, Ctr Mol Design & Recognit, Akron, OH 44325, USAUniv Akron, Dept Chem, Akron, OH 44325, USACtr Invest & Desarrollo Tecnol Electroquim SC, Pedro Escobedo 76700, Queretaro, MexicoMishra, A, Tata Inst Fundamental Res, Dept Chem Sci, Homi Bhabha Rd, Bombay 400005, Maharashtra, India TI - Synthesis, spectroscopic and electrochemical investigation of some new stilbazolium dyes AB - The synthesis of some new solvatochromic mono-, bis-, and tetrakistilbazolium dyes, 2-5, is presented. The dyes were characterized by H-1, C-13 NMR and mass spectroscopy. The UV-vis spectroscopic investigation of these compounds shows broad absorption bands [assigned to intramolecular charge transfer (ICT) processes] in different solvents in the range of 450-520 nm. The electrochemical behavior of the dyes, on the other hand, showed an irreversible reduction voltammetric wave that was postulated to arise from the formation of a chemically reactive neutral radical species. From the simulation of cyclic voltammetry measurements at different scan rates, it was possible to compute thermodynamic potentials. electron transfer rate constants, and diffusion coefficients for all the compounds under study. (C) 2003 Elsevier Ltd. All rights reserved MH - India MH - Mexico|Queretaro MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Engineering, Chemical;Materials Science, Textiles U5 - J;Article AV - English IS - 0143-7208 UR - ISI:000184114300005 L2 - stilbazolium (hemicyanine) dyes;denotritic;absorption spectra;hydrogen bonding;electrochemical rate constant;diffusion coefficient;CYANINE DYE; SURFACTANT INTERACTION; PYRIDINIUM DYES; FLUORESCENCE; OXIDATION; BEHAVIOR; CHAIN SO - Dyes and Pigments 2003 ;58(3):227-237 8842 UI - 7429 AU - Mitrani R AU - Brudvik JS AU - Phillips KM AD - Univ Washington, Seattle, WA 98195, USAMitrani, R, Andes 115,Lomas Chapultepec, Mexico City 11000, DF, Mexico TI - Posterior implants for distal extension removable prostheses: A retrospective study AB - Common complaints associated with the Kennedy Class I (bilateral free end) and Class II (unilateral free end) removable partial denture situations are lack of stability, minimal retention, and unesthetic retentive clasping. Some of the same complaints have been reported for implant overdentures with only anterior implants. Starting in 1995, 10 of these patients were treated at the University of Washington with posterior osseointegrated implants to provide stability and/or retention of the removable prostheses, eliminating the need for clasps when possible. This article describes implant alternatives and prosthesis designs and presents a follow-up clinical evaluation of at least 1 year consisting of patient satisfaction, radiographic examination, and soft tissue health. Two groups were evaluated. Group 1 included patients whose implants were used as vertical stops for mandibular distal extension prostheses. Care was taken to ensure that the implants were not loaded laterally by creating a single-point contact at the center of a modified healing abutment. In these cases, sufficient retention was available from the anterior teeth and/or implant abutments. Group 2 included patients whose implants required retention because of lack of adequate tooth abutments. In those cases, a resilient type of attachment was used, which allowed for a small divergence from the path of insertion. Results indicated consistent increased satisfaction in all patients, minimal component wear, no radiographic evidence of excessive bone loss, and stable peri-implant soft tissues MH - Mexico|Distrito Federal MH - USA PB - CAROL STREAM: QUINTESSENCE PUBL CO INC RP - NOT IN FILE U3 - TC 2 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0198-7569 UR - ISI:000185428700006 L2 - MAXILLARY COMPLETE DENTURE; COMBINATION SYNDROME; CLINICAL REPORT; RECONSTRUCTION; AUGMENTATION SO - International Journal of Periodontics & Restorative Dentistry 2003 ;23(4):353-359 8843 UI - 6605 AU - Mochan WL AU - Lopez-Bastidas C AU - Maytorena JA AU - Mendoza BS AU - Brudny VL AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoCtr Invest Opt, Guanajuato, MexicoUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaMochan, WL, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Depth resolved nonlinear optical nanoscopy AB - An electromagnetic field forced to vary along a plane with a spatial scale d much smaller than its free space wavelength lambda decays exponentially along its normal with a decay length similar tod. This decay, similar to that of the wavefunction of tunneling electrons, has allowed the development of scanning near-field optical microscopes (SNOMs), reminiscent of scanning tunneling and atomic force microscopes, which have been able to resolve structures in the nanometer scale. However, existing SNOMs are unable to determine the depth below the surface from which the optical signals arise due to the monotonic decay of the optical evanescent probe fields. In this paper we study the optical second harmonic generation (SHG) produced by mixing of the evanescent fields produced by a SNOM tip. We show that employing an appropriately spatially-patterned tip, a non-monotonic non-linear probing field may be produced which has a maximum at a given distance beyond the tip, yielding a novel microscopy which may attain depth resolution with nanometric lengthscales. We estimate the size of the optical signal and we compare it with that arising in the usual SHG-based surface spectroscopy of centrosymmetric materials. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Argentina MH - Mexico|Baja California MH - Mexico|Guanajuato MH - Mexico|Morelos PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000187566600010 L2 - FIELD 2ND-HARMONIC GENERATION; MICROSCOPY; RESOLUTION; SURFACE; PROBE; EXCITATION; REFLECTION; CONTRAST; MODEL; SCALE SO - Physica Status Solidi B-Basic Research 2003 ;240(3):527-536 8844 UI - 7481 AU - Mochan WL AU - Maytorena JA AU - Mendoza BS AU - Brudny VL AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoCtr Invest Opt, Guanajuato 37000, MexicoUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaMochan, WL, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Second-harmonic generation in arrays of spherical particles AB - We calculate the optical second harmonic (SH) radiation generated by small spheres made up of a homogeneous centrosymmetric material illuminated by inhomogeneous transverse and/or longitudinal electromagnetic fields. We obtain expressions for the hyperpolarizabilities of the particles in terms of the multipolar bulk susceptibilities and dipolar surface susceptibilities of their constitutive material. We employ the resulting response functions to obtain the nonlinear susceptibilities of a composite medium made up of an array of such particles and to calculate the radiation patterns and the efficiency of SH generation from the bulk and the edge of thin composite films illuminated by finite beams. Each sphere has comparable dipolar and quadrupolar contributions to the nonlinear radiation, and the composite has comparable bulk and edge contributions which interfere among themselves yielding nontrivial radiation and polarization patterns. We present numerical results for Si spheres and we compare our results with recent experiments MH - Argentina MH - Mexico|Guanajuato MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000185287500050 L2 - ELECTROMAGNETIC RESPONSE; SPATIAL FLUCTUATIONS; HARMONIC-GENERATION; METAL-SURFACES; SCATTERING; SEMICONDUCTOR; REFLECTION; SYMMETRY; SYSTEMS; SPHERES SO - Physical Review B 2003 ;68(8): 8845 UI - 7569 AU - Mock C AU - rreola-Risa C AU - Trevino-Perez R AU - mazan-Saavedra V AU - Zozaya-Paz JE AU - Gonzalez-Solis R AU - Simpson K AU - Rodriguez-Romo L AU - Hernandez-Torre MH AD - Univ Washington, Harborview Med Ctr, Harborview Injury Prevent & Res Ctr, Seattle, WA 98104, USAUniv Washington, Dept Surg, Seattle, WA 98195, USAUniv Washington, Dept Epidemiol, Seattle, WA 98195, USAHosp 21, Inst Mexicano Seguro Social, Monterrey, NL, MexicoInst Tecnol & Estudios Super Monterrey, Sch Med, Monterrey, NL, MexicoUniv Washington, Seattle, WA 98195, USAMock, C, Univ Washington, Harborview Med Ctr, Harborview Injury Prevent & Res Ctr, Box 359960,325 9Th Ave, Seattle, WA 98104 USA TI - Injury prevention counselling to improve safety practices by parents in Mexico AB - Objectives To evaluate the effectiveness of educational counselling programmes aimed at increasing parents' practice of childhood safety in Monterrey, Mexico, and to provide information aimed at, helping to improve the effectiveness of future efforts in this field. Methods Three different counselling programmes were designed to meet the needs of the upper, middle and lower socioeconomic strata. Evaluation involved the use of baseline questionnaires on parents' existing safety-related practices for intervention and control groups and the administration of corresponding questionnaires after the programmes had been carried out. Findings Data were obtained on, 1124 children before counselling took place and on 625 after it had been given. Overall safety scores (% safe responses) increased from 54% and 65% for the lower and upper socioeconomic strata, respectively, before counselling to 62% and 73% after counselling (P <0.001 for all groups). Improvements occurred both for activities that required caution and for activities that required the use of safety-related devices (e.g. helmets, car seats). However, scores for the use of such devices remained suboptimal even after counselling and there were wide discrepancies between the socioeconomic strata. The post-counselling scores for the use of safety-related devices were 55%, 38% and 19% for the upper, middle and lower socioeconomic strata, respectively. Conclusions Brief educational interventions targeting parents' practice of childhood safety improved safe behaviours. Increased attention should be given to specific safety-related devices and to the safety of pedestrians. Educational efforts should be combined with other strategies for injury prevention, such as the use of legislation and the improvement of environmental conditions MH - Mexico|Nuevo Leon MH - USA PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 5 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0042-9686 UR - ISI:000185162800008 L2 - wounds and injuries/prevention and control;safety;counseling;parents;parent-child relations;child behavior;health education/methods;socioeconomic factors;pilot projects;Mexico;DEVELOPING-COUNTRIES; PEDIATRICIANS; EPIDEMIOLOGY; CITY SO - Bulletin of the World Health Organization 2003 ;81(8):591-598 8846 UI - 8584 AU - Mogensen CE AU - Viberti G AU - Halimi S AU - Ritz E AU - Ruilope L AU - Jermendy G AU - Widimsky J AU - Sareli P AU - Taton J AU - Rull J AU - Erdogan G AU - De Leeuw PW AU - Ribeiro A AU - Sanchez R AU - Mechmeche R AU - Nolan J AU - Sirotiakova J AU - Hamani A AU - Scheen A AU - Hess B AU - Luger A AU - Thomas SM AD - Aarhus Kommune Hosp, DK-8000 Aarhus, DenmarkUniv London Kings Coll, Guys Hosp, London WC2R 2LS, EnglandCHU Grenoble, F-38043 Grenoble, FranceFak Klin Med, Heidelberg, GermanyHosp 12 Octubre, E-28041 Madrid, SpainBajcsy Zsilinsky Korhaz III Belosztaly, Budapest, HungaryIKEM, Prague, Czech RepublicUniv Witwatersrand, Johannesburg, South AfricaKatredra I Klin Chorob, Warsaw, PolandInst Nacl Nutr, Mexico City, DF, MexicoAnkara Univ, Tip Fak, TR-06100 Ankara, TurkeyAcad Ziekenhuis Maastricht, Maastricht, NetherlandsFdn Oswaldo Cruz, Sao Paulo, BrazilInst Cardiol & Cirurg Cardiovasc, Buenos Aires, DF, ArgentinaHop La Rabta, Tunis Jabbart, TunisiaDept Endocrinol, Dublin, IrelandGen Hosp, Nitra, SlovakiaHop Mohammed V, Rabat, MoroccoCHU Sart Tilman, B-4000 Liege, BelgiumInselspital Bern, Dept Endocrinol, CH-3010 Bern, SwitzerlandMogensen, CE, Aarhus Univ Hosp, Aarhus Kommune Hosp, Dept Med M, DK-8000 Aarhus, Denmark TI - Effect of low-dose perindopril/indapamide on albuminuria in diabetes preterax in albuminuria regression: PREMIER AB - Microalbuminuria in diabetes is a risk factor for early death and an indicator for aggressive blood pressure (BP) lowering. We compared a combination of 2 mg perindopril/0.625 mg indapamide with enalapril monotherapy on albumin excretion rate (AER) in patients with type 2 diabetes, albuminuria, and hypertension in a 12-month, randomized, double-blind, parallel-group international multicenter study. Four hundred eighty-one patients with type 2 diabetes and hypertension (systolic BP greater than or equal to 140 mm Hg, <180 mm Hg, diastolic BP <110 mm Hg) were randomly assigned (age 59+/-9 years, 77% previously treated for hypertension). Results from 457 patients (intention-to-treat analysis) were available. After a 4-week placebo period, patients with albuminuria >20 and <500 μg/min were randomly assigned to a combination of 2 mg perindopril/0.625 mg indapamide or to 10 mg daily enalapril. After week 12, doses were adjusted on the basis of BP to a maximum of 8 mg perindopril/2.5 mg indapamide or 40 mg enalapril. The main outcome measures were overnight AER and supine BP. Both treatments reduced BP. Perindopril/indapamide treatment resulted in a statistically significant higher fall in both BP (-3.0 [95% CI -5.6, -0.4], P=0.012; systolic BP -1.5 [ 95% CI -3.0, -0.1] diastolic BP P=0.019) and AER -42% (95% CI -50%, -33%) versus -27% (95% CI -37%, -16%) with enalapril. The greater AER reduction remained significant after adjustment for mean BP. Adverse events were similar in the 2 groups. Thus, first-line treatment with low-dose combination perindopril/indapamide induces a greater decrease in albuminuria than enalapril, partially independent of BP reduction. A BP-independent effect of the combination may increase renal protection MH - Argentina MH - Belgium MH - Brazil MH - Czech Republic MH - Denmark MH - United Kingdom MH - France MH - Germany MH - Hungary MH - Ireland MH - Mexico|Distrito Federal MH - Morocco MH - Netherlands MH - Poland MH - Slovakia MH - South Africa MH - Spain MH - Switzerland MH - Tunisia MH - Turkey PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 56 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0194-911X UR - ISI:000182586000013 L2 - albuminuria;microalbuminuria;hypertension, renal;diabetes mellitus;angiotensin-converting enzyme;CONVERTING ENZYME-INHIBITION; CONTROLLED TRIAL; MICROALBUMINURIA; HYPERTENSION; NEPHROPATHY; MELLITUS; COMBINATION; ENALAPRIL; INDAPAMIDE; REDUCTION SO - Hypertension 2003 ;41(5):1063-1071 8847 UI - 6539 AU - Mohapatra RN AU - Nussinov S AU - Perez-Lorenzana A AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAUniv S Carolina, Dept Phys, Columbia, SC 29208, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Large extra dimensions and decaying Kaluza-Klein recurrences AB - We suggest the possibility that in Arkani-Hamed-Dimopoulos-Dvali (ADD)-type brane-world scenarios the higher Kaluza-Klein (KK) excitations of the graviton may decay to lower ones owing to a breakdown of the conservation of extra dimensional "momenta" and study its implications for astrophysics and cosmology. We give an explicit realization of this idea with a bulk scalar field Phi, whose nonzero KK modes acquire vacuum expectation values. This scenario helps to avoid constraints on large extra dimensions that come from gamma ray flux bounds in the direction of nearby supernovae as well as those coming from a diffuse cosmological gamma ray background. It also relaxes the very stringent limits on the reheat temperature of the Universe in ADD models MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000187885400050 L2 - LARGE COMPACT DIMENSIONS; FUTURE COLLIDERS; INFLATION; CONSTRAINTS; TEV; BARYOGENESIS; MILLIMETER; SCATTERING; SPACETIME; NEUTRINOS SO - Physical Review D 2003 ;68(11): 8848 UI - 8495 AU - Mohapatra RN AU - Perez-Lorenzana A AD - Univ Maryland, Dept Phys, College Pk, MD 20742, USAAbdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMohapatra, RN, Univ Maryland, Dept Phys, College Pk, MD 20742, USA TI - Neutrino mass, proton decay, and dark matter in TeV scale universal extra dimension models AB - We show how the problem of small neutrino masses and suppressed proton decay can be simultaneously resolved in 6D universal extra dimension models (UED's) with a low fundamental scale using extended gauge groups that contain the local B-L symmetry. The extra space dimensions are compactified either on a T-2/Z(2) or T-2/Z(2)xZ(2)(') orbifold depending on whether the full gauge group is SU(2)(L)xU(1)(I3R)xU(1)(B-L) or SU(2)(L)xSU(2)(R)xU(1)(B-L). In both cases, neutrino masses are suppressed by an appropriate orbifold parity assignment for the standard model singlet neutrinos and the proton decay rate is suppressed due to a residual discrete symmetry left over from compactification. For lower values of the fundamental scale, a dominant decay mode of the neutron is n-->3nu. An interesting consequence of the model is a possible two component picture for the dark matter of the universe MH - Italy MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 34 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000182718300095 L2 - ANOMALY CANCELLATION; STERILE NEUTRINO; QUANTUM-GRAVITY; NUCLEON DECAY; COMPACTIFICATION; OSCILLATIONS; MILLIMETER; HIERARCHY; SYMMETRY; LIMITS SO - Physical Review D 2003 ;67(7): 8849 UI - 7976 AU - Molina-Freamer F AU - Cervantes-Salas M AU - Morales-Romero D AU - Buchmann S AU - Fleming TH AD - Univ Nacl Autonoma Mexico, Inst Ecol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoARS, USDA, Carl Hayden Bee Res Ctr, Tucson, AZ 85719, USAUniv Miami, Dept Biol, Coral Gables, FL 33124, USAMolina-Freamer, F, Univ Nacl Autonoma Mexico, Inst Ecol, Estac Reg Noroeste, Apartado Postal 1354, Hermosillo 83000, Sonora, Mexico TI - Does the pollinator abundance hypothesis explain geographic variation in the breeding system of Pachycereus pringlei? AB - Previous studies have shown that the nectar-feeding bat, Leptonycteris curasoae, is the major pollinator of Pachycereus pringlei (cardon), a columnar cactus whose populations are either gynodioecious or trioecious in the Sonoran Desert. On the basis of evidence of pollinator limitation in females and low flower visitation rates, a hypothesis has been proposed to explain geographic variation in the breeding system of P. pringlei. The pollinator abundance hypothesis predicts high frequencies of males and females in areas where L. curasoae is abundant and high frequency of hermaphrodites in areas where this bat is uncommon. We test this hypothesis by describing the following: first, the relationship between sex frequencies and bat abundance as revealed by nocturnal pollen deposition on stigmas of female plants and, second, the extent of pollinator limitation for fruit set in females and hermaphrodites in four populations of P. pringlei from coastal Sonora, Mexico. We also describe geographic variation in the relative fitness of females compared with hermaphrodites and outcrossing rates and inbreeding depression of self-compatible hermaphrodites in these populations. Some of these parameters should vary with bat abundance according to this hypothesis. Sex-frequency distributions showed a clear latitudinal pattern, with gynodioecious populations in the southern range and trioecious populations in the northern range. Large differences in nocturnal pollen deposition in females and abundance of L. curasoae were detected among populations but not as predicted by the pollinator abundance hypothesis. Fruit set was greater in females than in hermaphrodites in different pollination treatments, and no evidence of pollinator limitation was detected in either sex class. In general, the relative fitness of females was greater than hermaphrodites in most populations. Outcrossing rates in hermaphrodites were close to 1.0 in each population. Field and experimental data indicated no evidence of inbreeding depression. Our results do not support the hypothesis that the sex-frequency distribution of P. pringlei is closely correlated with the abundance of L. curasoae but do demonstrate that females outperform hermaphrodites in gynodioecious and trioecious populations. Studies of the distribution of mtDNA variants are needed to understand geographic variation in the breeding system of P. pringlei MH - Mexico|Sonora MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 1058-5893 UR - ISI:000184018200006 L2 - columnar cacti;gynodioecy;trioecy;Pachycereus pringlei;Sonoran Desert;THYMUS-VULGARIS L; CYTOPLASMIC MALE-STERILITY; DESERT COLUMNAR CACTI; POLLEN LIMITATION; INBREEDING DEPRESSION; TRIOECIOUS CACTUS; SILENE VULGARIS; SEX-RATIO; SEED SET; EVOLUTION SO - International Journal of Plant Sciences 2003 ;164(3):383-393 8850 UI - 8723 AU - Molina-Garza RS AU - Geissman JW AU - Lucas SG AD - UNAM, Ctr Geociencias, Queretaro 76230, MexicoUniv New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131, USANew Mexico Museum Nat Hist & Sci, Albuquerque, NM 87104, USAMolina-Garza, RS, UNAM, Ctr Geociencias, Campus Juriquilla, Queretaro 76230, Mexico TI - Paleomagnetism and magnetostratigraphy of the lower Glen Canyon and upper Chinle Groups, Jurassic-Triassic of northern Arizona and northeast Utah AB - Twenty-eight selected sites ( individual beds) in the Moenave Formation at the Echo Cliffs, northern Arizona, strata give a Hettangian paleomagnetic pole at 63.7degreesN, 59.7degreesE (dp = 2.6degrees, dm = 5.1degrees). The Wingate Sandstone and Rock Point Formation at Comb Ridge, southeast Utah, provide a Rhaetian paleopole at 57.4degreesN, 56.6degreesE (N = 16 sites; dp = 3.4, dm = 6.5). High unblocking temperatures (>600degreesC), high coercivity, and data analyses indicate that the characteristic magnetization is primarily a chemical remanence residing in hematite. The Hettangian and Rhaetian poles are statistically indistinguishable (at 95% confidence), they resemble existing data for the Glen Canyon Group, and they provide further validation to the J1 cusp of the North American apparent pole wander path (APWP). The red siltstone and upper members of the Chinle Group, on the south flank of the Uinta Mountains, northern Utah, define a Rhaetian pole at 51.6degreesN, 70.9degreesE (N = 20 sites; dp = 3.5degrees, dm = 6.9degrees). The Gartra and upper members of the Chinle Group in the north flank of the Uinta Mountains, give paleopoles at 52.0degreesN, 100.3degreesE (N = 6 sites; dp = 5.4degrees, dm = 10.5degrees) and 50.9degreesN, 50.1degreesE (N = 5 sites; dp = 8.8degrees, dm = 17.5degrees), respectively. These data indicate no significant rotation of the Uinta Mountains with respect to the craton. In total, data for the plateau and its bordering region of Cenozoic uplifts support estimates of small rotation of the plateau and provide evidence against the hypothesis of a Late Triassic standstill of the North American APWP. Our magnetostratigraphic results are consistent with lithographic and biostratigraphic data that place the Triassic-Jurassic boundary within the Dinosaur Canyon Member of the Moenave Formation, not at a regional hiatus MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000182256400004 L2 - paleomagnetism;Triassic;Jurassic;magnetostratigraphy;Colorado Plateau;APPARENT POLAR WANDER; COLORADO PLATEAU ROTATION; WESTERN UNITED-STATES; NEW-MEXICO; MOENAVE FORMATION; AMERICA; BASIN; PATH; USA; SECTION SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B4): 8851 UI - 7179 AU - Molina-Ochoa J AU - Carpenter JE AU - Heinrichs EA AU - Foster JE AD - Univ Colima, Fac Ciencias Biol & Agropecuarias, Tecoman 28100, Colima, MexicoUSDA ARS, Crop Protect Management Res Lab, Tifton, GA 31793, USAUniv Nebraska, Dept Entomol, Lincoln, NE 68583, USAMolina-Ochoa, J, Univ Colima, Fac Ciencias Biol & Agropecuarias, Apartado Psotal 36, Tecoman 28100, Colima, Mexico TI - Parasitoids and parasites of Spodoptera frugiperda (Lepidoptera : Noctuidae) in the Americas and Caribbean Basin: An inventory AB - An inventory of parasitoids and parasites of fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith), was conducted using references describing parasitized FAW eggs, larvae, pupae and adults collected from different crops or habitats throughout the Americas and the Caribbean Basin. The crops and countries where these parasites were reported occurring in the Americas is also inventoried. Maize was the crop where the FAW was more frequently collected followed by rice. Overall, Chelonus insularis (Cresson) had the broadest natural distribution in the Americas. For the North American region C. insulares, Chelonus sp., and Euplectrus platyhypenae (Howard) were the most relevant parasitoids. In Central America, C. insularis was the most prevalent parasitoid, and in the South American region the most prevalent parasites were Archytas incertus (Macq.), A. marmoratus (Tns.), C. insularis, and Meteorus laphygmae (Viereck). Diapetimorpha introita (Cresson) is the most important pupal parasitoid of FAW occurring mainly in North America. An acugutturid, Noctuidonema guyanense (Remillet & Silvain), is the most important ectoparasitic nematode attacking adults of FAW and other noctuid moths in South and Southeastern US, and Mexico in North America, Caribbean Basin, Central America, and Northern South America MH - Mexico|Colima MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Review AV - English IS - 0015-4040 UR - ISI:000186085700005 L2 - parasitoids;fall armyworm;Chelonus insularis;Diapetimorpha introita;Noctuidonema guyanense;maize;natural distribution;biological control;FALL ARMYWORM LEPIDOPTERA; DIAPETIMORPHA-INTROITA HYMENOPTERA; EIPHOSOMA-VITTICOLE HYMENOPTERA; SUSCEPTIBLE CORN GENOTYPES; ECTOPARASITIC NEMATODE; GUYANENSE NEMATODA; POPULATION-DYNAMICS; CRESSON HYMENOPTERA; TROPICAL AMERICA; TRANSFER SUCCESS SO - Florida Entomologist 2003 ;86(3):254-289 8852 UI - 7060 AU - Molina R AU - Galina CS AU - Maquivar M AU - Estrada S AU - Chavez A AU - Diaz GS AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Mexico City 04510, DF, MexicoInst Tecnol Costa Rica, Escuela Agron, San Jose, Costa RicaUniv Nacl, Escuela Med Vet, San Jose, Costa RicaGalina, CS, Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Mexico City 04510, DF, Mexico TI - Pregnancy rate in Zebu cows with two different postpartum intervals exposed to a two-bull rotational system AB - In order to evaluate the reproductive effect of a rotational breeding system, the pregnancy rate of 69 Zebu cows was assessed, 32 late postpartum (211 +/- 93 days postpartum, LP) and 37 early postpartum (averaging 63 +/- 8 days after calving, EP). In the LP group, 60% (19/32) were cycling before exposure to the bulls but only 38% (14/37) in the EP group. The two groups were dissimilar from the start (p < 0.05). The cows were exposed in a rotational breeding system, with six Brahman bulls with previous sexual experience paired off in three groups (A B, C-D and E-F). The cows were exposed to each pair of bulls for a period of 3 weeks, with one week in between each period, when the females were without the presence of a male. In the LP group, the pair of bulls A B obtained a pregnancy rate of 72% (23/32), whereas for bulls C D the pregnancy rate was 33% (3/9) and for bulls E-F the pregnancy rate was 67% (4/6). In contrast, for the EP cows, bulls A-B obtained a pregnancy rate of 32% (12/37), bulls C-D a pregnancy rate of 67% (12/18) and for bulls E-F a pregnancy rate of 55% (6/11). The percentage pregnancy obtained using the pair of bulls A B differed (p < 0.05) between LP and EP, whereas for bulls C-D and E F it was similar. The pregnancy rate was different (P < 0.05) in the first 3 weeks of mating for the LP group, the highest number of cows becoming pregnant during the first 3 weeks of the study In contrast, the highest number of pregnancies in EP occurred evenly during the last 6 weeks. This study suggests that the reproductive performance of pairs of bulls in a 9-week rotational programme with the overall pregnancy rate is similar (94% in the LP and 81% in the EP). However, the time taken for the females to become pregnant, and hence the performance of the bulls, is related to the average number of days postpartum for the cows MH - Costa Rica MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0165-7380 UR - ISI:000186338100009 L2 - Brahman;cows;early postpartum;late postpartum;pregnancy rate;rotational breeding;Zebu;OVARIAN ACTIVITY; BEEF-COWS; REPRODUCTIVE-PERFORMANCE; HUMID TROPICS; SINGLE-SIRE; COSTA-RICA; BULLS; RESUMPTION; HEIFERS; CATTLE SO - Veterinary Research Communications 2003 ;27(8):671-680 8853 UI - 7749 AU - Moncho-Jorda A AU - Odriozola G AU - Tirado-Miranda M AU - Schmitt A AU - Hidalgo-Alvarez R AD - Univ Granada, Dept Fis Aplicada, E-18071 Granada, SpainInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Extremadura, Dept Fis, Escuela Politecn, Caceres, SpainMoncho-Jorda, A, Univ Granada, Dept Fis Aplicada, Campus Fuentenueva, E-18071 Granada, Spain TI - Modeling the aggregation of partially covered particles: Theory and simulation AB - A theoretical model for describing the initial stages of the aggregation of partially covered colloidal particles is presented. It is based on the assumption of short-range interactions that may be modeled by a sticking probability on contact. Three types of sticking probabilities are distinguished depending on the collision type, i.e., for bare-bare, bare-covered, and covered-covered collisions. Hence, the model allows an analytical expression for the dimer-formation rate constant k(11), to be deduced as a function of the degree of surface coverage and the three sticking probabilities. The theoretical predictions are contrasted with simulated data. The observed agreement between theory and simulations shows the usefulness of the model for predicting the initial stages of this kind of aggregation processes MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000184582400024 L2 - COLLISION EFFICIENCY FACTORS; BOVINE SERUM-ALBUMIN; POLYSTYRENE LATEX; POLYMER FLOCCULATION; COLLOIDAL CLUSTERS; ADSORPTION; STABILITY; TRANSITION; RLCA; DLCA SO - Physical Review e 2003 ;68(1): 8854 UI - 6627 AU - Mondie S AU - Michiels W AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoKatholieke Univ Leuven, Dept Comp Sci, B-3001 Heverlee, BelgiumMondie, S, IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, Mexico TI - Finite spectrum assignment of unstable time-delay systems with a safe implementation AB - The instability mechanisms, related to the implementation of distributed delay controllers in the context of finite spectrum assignment, were studied in detail in the past few years. In this note we introduce a distributed delay control law that assigns a finite closed-loop spectrum and whose implementation with a sum of point-wise delays is safe. This property is obtained by implicitly including a low-pass filter in the control loop. This leads to a closed-loop characteristic quasipolynomial of retarded type, and not one of neutral type, which was shown to be a cause of instability in previous schemes MH - Belgium MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000187577300014 L2 - delay equations;finite spectrum assignment;LINEAR-SYSTEMS; STABILIZATION; STABILITY SO - Ieee Transactions on Automatic Control 2003 ;48(12):2207-2212 8855 UI - 6712 AU - Mondragon M AU - Zoupanos G AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Tech Univ Athens, Dept Phys, Athens 15780, GreeceMondragon, M, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Higgs mass prediction in finite unified theories AB - Finite Unified Theories (FUTs) are N = 1 supersymmetric Grand Unified Theories, which can be made all-loop finite, both in the dimensionless (gauge and Yukawa couplings) and dimensionful (soft supersymmetry breaking terms) sectors. This remarkable property provides a drastic reduction in the number of free parameters, which in turn leads to an accurate prediction of the top quark mass in the dimensionless sector, and predictions for the Higgs boson mass and the s-spectrum in the dimensionful sector. Here we examine the predictions of two FUTs taking into account the various theoretical and experimental constraints as well as their restricted parameter space. For the first we present the results of a detailed scanning concerning the Higgs mass prediction, while for the second we present a representative prediction of its spectrum MH - Greece MH - Mexico|Distrito Federal PB - KRAKOW: ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0587-4254 UR - ISI:000187412600025 L2 - SOFT SUPERSYMMETRY-BREAKING; GAUGE-THEORIES; RENORMALIZATION; SUPERGRAPHS; COUPLINGS; MODELS; REDUCTION; QUARK; TERMS SO - Acta Physica Polonica B 2003 ;34(11):5459-5468 8856 UI - 7909 AU - Monneveux P AU - Pastenes C AU - Reynolds MP AD - CIMMYT, INRA CIMMYT Wheat Project, Mexico City 06600, DF, MexicoUniv Chile, Fac Ciencias Agron, Lab Fisiol Estres Vegetal, Santiago 1004, ChileCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoMonneveux, P, CIMMYT, INRA CIMMYT Wheat Project, AP 6-641, Mexico City 06600, DF, Mexico TI - Limitations to photosynthesis under light and heat stress in three high-yielding wheat genotypes AB - Three high-yielding wheat genotypes (T aestivum L., c.v. Siete Cerros, Seri and Bacanora, released in 1966, 1982 and 1988, respectively) were grown under irrigation in two high radiation, low relative humidity environments (Tlaltizapan and Ciudad Obregon CIMMYT experimental stations, Mexico). Gas exchange and fluorescence parameters were assessed on the flag leaf during the day. Carbon isotope discrimination (Delta) was analysed in flag leaf at anthesis and in grain at maturity. In both environments, gas exchange and fluorescence parameters varied markedly with irradiance and temperature. Analysis of their respective variation indicated the occurrence of photo-respiration and photo-inhibition, particularly in Tlaltizapan, the warmest environment, and in Siete Cerros. In Ciudad Obregon (high-yielding environment) lower C-i (internal CO2 concentration) and DeltaL(a) (carbon isotope discrimination of the leaf) suggested a higher intrinsic photosynthetic capacity in the variety Bacanora. Higher yield of this genotype was also associated with higher Fv'/Fo' (ratio of photochemical and non photochemical rate constants in the light) and Fm'/Fm (ratio of the non photochemical rate constants in the dark and light adapted state) MH - Chile MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000184153400010 L2 - carbon isotope discrimination;chlorophyll fluorescence;gas exchange;photo-inhibition;wheat (Triticum aestivum L.);CARBON-ISOTOPE DISCRIMINATION; CHLOROPHYLL FLUORESCENCE; PHOTOSYSTEM-II; GAS-EXCHANGE; HIGH-TEMPERATURE; USE EFFICIENCY; LEAF STRUCTURE; PHOTOINHIBITION; PRODUCTIVITY; PLANTS SO - Journal of Plant Physiology 2003 ;160(6):657-666 8857 UI - 9199 AU - Monreal R AU - Longoria JF AD - Univ Sonora, Dept Geol, Hermosillo 83000, Sonora, MexicoFlorida Int Univ, Dept Earth Sci, Miami, FL 33199, USAMonreal, R, Univ Sonora, Dept Geol, Rosales & Blvd Luis Encinas, Hermosillo 83000, Sonora, Mexico TI - Stratigraphy and structure of the Lower Cretaceous of Lampazos, Sonora (northwest Mexico), and its relationship to the Gulf Coast succession: Reply MH - Mexico|Sonora MH - USA PB - TULSA: AMER ASSOC PETROLEUM GEOLOGIST RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels;Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0149-1423 UR - ISI:000180969400010 SO - Aapg Bulletin 2003 ;87(2):361-364 8858 UI - 6780 AU - Monsivais G AU - Rodriguez-Ramos R AU - Esquivel-Sirvent R AU - Fernandez-Alvarez L AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, Havana 4, CubaUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 01000, DF, MexicoAMS, Alcobendas 28108, SpainMonsivais, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Stark-ladder resonances in piezoelectric composites AB - In this paper we introduce a piezoelectric composite medium. The composite shows a series of resonances similar to the Stark-ladder resonances originally observed in the propagation of electrons through crystals in a dc electric field. These resonances appear when shear horizontal and surface waves propagate through a special piezoelectric composite medium consisting of N piezoelectric layers, each layer being a material of hexagonal 6mm symmetry. For periodic piezocomposites, we obtain a band structure as expected. However, when the periodicity is broken by adding a linear term in the values of the piezoelectric parameters of the layers, the band structure is destroyed and, in certain cases, resonances of Stark-ladder type appear instead. A 4x4 transfer matrix approach is used to calculate the response of the composite under electromechanical perturbations. The response is studied as a function of the properties of the different materials, width of the layers, wave frequency, and angle of incidence. Numerical results for the electric potential and for the displacement of the surface of the last layer of the composite are presented showing the existence of Stark-ladder resonances MH - Cuba MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000186971600028 L2 - ELECTRIC-FIELD; BLOCH ELECTRONS; FINITE CRYSTALS; ELASTIC-WAVES; HOMOGENIZATION; PROPAGATION; MULTILAYERS; CHAINS; SOLIDS; MEDIA SO - Physical Review B 2003 ;68(17): 8859 UI - 8030 AU - Montalvo PG AU - Jaffe N AU - Farzin E AD - MD Anderson Canc Ctr, Dept Pediat, Houston, TX 77030, USADept Oncol, Mexico City, DF, MexicoMD Anderson Canc Ctr, Dept Diagnost Imaging, Houston, TX, USAJaffe, N, MD Anderson Canc Ctr, Dept Pediat, 1515 Holcombe Blvd, Houston, TX 77030 USA TI - Relapse eighteen and one-half years after apparent cure of sarcoma botryoides of the vagina MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Oncology;Pediatrics U5 - J;Letter AV - English IS - 0098-1532 UR - ISI:000183962300021 L2 - RHABDOMYOSARCOMA; THERAPY SO - Medical and Pediatric Oncology 2003 ;41(2):178-+ 8860 UI - 6681 AU - Montanez-Saenz JC AU - Ortiz-Cisneros J AU - Reyes-Vega M AU - Contreras-Esquivel JC AU - Aguilar CN AD - Univ Autonoma Coahuila, Food Res Dep, Saltillo 25000, Coahuila, MexicoNatl Univ Ireland Univ Coll Cork, Dept Proc Engn, Cork, IrelandNatl Univ La Plata, CINDEFI, RA-1900 La Plata, ArgentinaAguilar, CN, Univ Autonoma Coahuila, Food Res Dep, POB 252, Saltillo 25000, Coahuila, Mexico TI - Biochemical and textural changes in potato tissue during water immersion at low temperatures AB - Biochemical and textural changes were evaluated in an experimental design with factorial fix during the immersion strips at several temperatures (60, 65 and 70 C) and times (0, 15, 30, 45, 60 min.). Pectinesterase (PE) activity, pH and firmness, as well as contents of starch, total and reducing sugars were determined. When potato strips were immersed in water at 60-65degreesC and 30-40 min, PE activity and firmness increased, but pH values decreased. Additionally, starch changes were not detected at intracellular level, and levels of total and reducing sugars were lower under the same conditions. Meanwhile, when potato strips were immersed in water at 70degreesC, starch was gelatinized, and reducing sugar contents was higher than those obtained at 60 and 65degreesC, and firmness was the lowest. These results suggest that pectic substances modifications in the cell walls and middle lamella may be mainly responsible for the increments in the texture quality of potato tissues during the water immersion at low temperature MH - Argentina MH - Ireland MH - Mexico|Coahuila PB - SEOUL: KOREAN SOC FOOD SCIENCE TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1226-7708 UR - ISI:000187390300005 L2 - potato;blanching;pectinesterase;starch;texture;REDUCING SUGARS; CARROTS; REHYDRATION; FIRMNESS; FROZEN; CHIPS; COLOR SO - Food Science and Biotechnology 2003 ;12(3):233-237 8861 UI - 6977 AU - Montanez C AU - Romo-Yanez J AU - Depardon F AU - Ceja V AU - Rendon A AU - Mornet D AU - Velazquez F AD - CINVESTAV, IPN, Dept Genet & Mol Biol, Mexico City 14000, DF, MexicoHosp St Antoine, Lab Physiopathol Cellulaire & Mol Retine, Paris, FranceINSERM, U128, IFR, Montpellier, France TI - Dystrophin Dp71 isoforms expressed in PC12 cells. Interaction between Dp71f and DGC MH - France MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701090 SO - American Journal of Human Genetics 2003 ;73(5):356-356 8862 UI - 7884 AU - Montano LM AU - Carbajal V AU - Arreola JL AU - Barajas-Lopez C AU - Flores-Soto E AU - Vargas MH AD - Inst Nacl Enfermedades Resp, Dept Invest Asma, Mexico City 14080, DF, MexicoUNAM, Dept Farmacol, Fac Med, Mexico City 04510, DF, MexicoQueens Univ, Dept Anat & Cell Biol, Kingston, ON K7L 3N6, CanadaMontano, LM, Inst Nacl Enfermedades Resp, Dept Invest Asma, Tlalpan 4502, Mexico City 14080, DF, Mexico TI - Acetylcholine and tachykinins involvement in the caffeine-induced biphasic change in intracellular Ca2+ in bovine airway smooth muscle AB - 1 Caffeine has been widely used as a pharmacological tool to evaluate Ca2+ release from the sarcoplasmic reticulum in isolated smooth muscle cells. However, in nervous tissue this drug also causes neurotransmitters release, which might cause additional effects when smooth muscle strips are evaluated. To assess this last possibility, simultaneous measurements of contraction and cytosolic Ca2+ concentration ( using Fura - 2/AM) were carried out in bovine airway smooth muscle strips during caffeine stimulation. 2 A first stimulation (S1, n = 11) with caffeine (10 mm) induced a biphasic change in cytosolic Ca2+, which consisted of a transient Ca2+ peak (254 +/- 40 nm, (X) over bar +/- SEM) followed by a plateau ( 92713 nm), and a transient contraction ( 204.72 +/- 31.56 mg tension mg tissue(-1)). A second caffeine stimulation (S2) produced a similar response but these parameters had a different magnitude. The S2/S1 ratios for these parameters were 0.69 +/- 0.02, 0.83 +/- 0.06 and 1.01 +/- 0.03, respectively. Addition of omega-conotoxin GVIA (1 muM) and tetrodotoxin (3.1 muM) before S2 significantly diminished these S2/S1 ratios (0.26 +/- 0.05, 0.26 +/- 0.09 and 0.64 +/- 0.11, respectively, n = 5, P<0.05), implicating the neurotransmitters release involvement in the response to caffeine. A similar effect ( P<0.01) was observed with atropine (1 muM, n = 4), the fragment 4 - 11 of substance P ( SP) ( an SP receptor antagonist, 10 mm, n = 5), and with both substances ( n = 4). 3 We discarded a direct effect of omega-conotoxin GVIA ( 1 mm) plus tetrodotoxin ( 3.1 mm) or of atropine ( 1 mm) plus SP fragment 4 - 11 on smooth muscle cells because they did not modify caffeine responses in isolated tracheal myocytes. 4 We confirmed by HPLC that caffeine increased the release of acetylcholine ( from 0.43 +/- 0.19 to 2.07 +/- 0.56 nm mg tissue(-1), P<0.02) in bovine airway smooth muscle strips. Detection of substance P by ELISA was not statistically different after caffeine stimulation ( geometric means before and after caffeine, 0.69 vs. 1.97 pg ml(-1) mg tissue(-1), respectively, P = 0.053). 5 We concluded that acetylcholine and tachykinins release are involved in the caffeine-induced biphasic changes in cytosolic Ca2+ concentration MH - Canada MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000184318100018 L2 - bovine airway smooth muscle;intracellular Ca2+;acetylcholine;substance P;tachykinins;neurotransmitter release;Ca2+ oscillations;GUINEA-PIG TRACHEA; INDUCED CALCIUM-RELEASE; SENSITIVE CHANNEL; SUBSTANCE-P; N-TYPE; MECHANISMS; ADENOSINE; STORES; CELLS; CONTRACTION SO - British Journal of Pharmacology 2003 ;139(6):1203-1211 8863 UI - 6417 AU - Montero PJ AU - De la Pena A AU - Gonzalez H AU - ngles-Cano E AD - Inst Nacl Cardiol, Subdirecc Diagnost & Tratamiento, Mexico City, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Unidad Coronaria, Mexico City, DF, MexicoInst Natl Sante & Rech Med, Unite 460, Paris, France TI - Lp(a) fibrin-binding and homocysteine are increased in atherothrombotic disease MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000186537100420 SO - Blood 2003 ;102(11):105B-105B 8864 UI - 8917 AU - Montero R AU - Serrano L AU - Davila VM AU - Ito A AU - Plancarte A AD - UNAM, Inst Invest Biomed, Mexico City 04510, DF, MexicoUNAM, Fac Med, Mexico City 04510, DF, MexicoUniv Asahikawa, Dept Parasitol, Asahikawa, Hokkaido, JapanMontero, R, UNAM, Inst Invest Biomed, Apdo Postal 70228, Mexico City 04510, DF, Mexico TI - Infection of rats with Taenia taeniformis metacestodes increases hepatic CYP450, induces the activity of CYP1A1, CYP2B1 and COH isoforms and increases the genotoxicity of the procarcinogens benzo[a]pyrene, cyclophosphamide and aflatoxin B-1 AB - Infection of rat liver by Taenia taeniformis metacestodes produced an increase in total CYP450 content and induced activity of the CYP1A1, CYP2B1 and COH isoforms. Variations in activity and P450 total content were found with increasing time of infection. During increased activity of P450 isoforms, rats were challenged with carcinogens metabolized by the mentioned isozymes and an increased amount of genotoxic damage was found when benzo[a] pyrene, cyclophosphamide and aflatoxin B-1 were used. No change was seen in CYP2E1 activity. These results support previous findings regarding an increased susceptibility to genotoxic damage of infected organisms MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0267-8357 UR - ISI:000181664300016 L2 - CARCINOGEN METABOLISM; SOLIUM CYSTICERCOSIS; CYTOCHROMES P450; TRANSGENIC MICE; LIVER; NEUROCYSTICERCOSIS; PRAZIQUANTEL; EXPRESSION; INFLAMMATION; ASSOCIATION SO - Mutagenesis 2003 ;18(2):211-216 8865 UI - 7323 AU - Montes IS AU - Deysine M AD - Mexican Inst Social Secur, Hosp Los Vernados, Dept Surg, Mexico City, DF, MexicoWinthrop Univ Hosp, Dept Surg, Mineola, NY 11501, USADeysine, M, 20 Prospect Ave, Garden City, NY 11530, USA TI - Spigelian and other uncommon hernia repairs AB - This article offers an overview of abdominal wall hernias, which are uncommon because of the unusual contents of their sacs. These include: Meckel's diverticulum, segments of the intestinal wall antimesenteric border, the vermiform appendix, the bladder; plus the penetration by the sac within the different muscle layers of the abdominal wall. These hernias present diagnostic difficulties and some are associated with high morbidity, but modem technology may help their prognosis. This article describes their histories and their unique presenting signs and symptoms and suggests up-to-date methods of imaging, as well as surgical tactics and technique MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 11 U4 - Surgery U5 - J;Article AV - English IS - 0039-6109 UR - ISI:000185566200014 L2 - MECKELS-DIVERTICULUM; INTERSTITIAL HERNIA; RICHTER HERNIA; AMYANDS HERNIA; FEMORAL HERNIA; LITTRES-HERNIA; APPENDICITIS; INFANTS; RARE SO - Surgical Clinics of North America 2003 ;83(5):1235-+ 8866 UI - 7177 AU - Montgomery DR AU - Lopez-Blanco J AD - Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195, USAUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoMontgomery, DR, Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA TI - Post-Oligocene river incision, southern Sierra Madre Occidental, Mexico AB - The Sierra Madre Occidental of western Mexico consists of a granitic basement covered by Oligocene ignimbrites that define a reference surface from which to estimate late Cenozoic river incision. A 90-m-grid digital elevation model was used to characterize contemporary topography and interpolate the Late Oligocene surface of the ignimbrite plateau from a surface fit to the highest points in the relatively undissected uplands between major river valleys. Long-term river incision rates calculated from the difference between this reference surface and longitudinal profiles of 11 rivers that flow toward the Tepic-Zacoalco rift zone range from about 0.01 to 0.2 mm year(-1). River profiles of this region also show evidence of river capture driven by flexural uplift along the flank of the rift zone. River profile concavity values (theta) in the Sierra Madre Occidental range front 0.22 to 0.63, a range similar to that reported previously for a wide range of environments. In contrast, the empirically constrained ratio of exponents in the stream power model of river incision (m/n) ranges from 0.44 to 0.52, close to the expected theoretical value of 0.5. The wider range of observed theta values may illustrate how theta can differ from the driving values of m/n in non-steady-state bedrock river systems. (C) 2003 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000186052900015 L2 - tectonic geomorphology;ignimbrite plateau;river incision;Mexico;LONGITUDINAL PROFILE DEVELOPMENT; MOUNTAIN DRAINAGE BASINS; LANDSCAPE RESPONSE; VOLCANIC BELT; SOUTHWESTERN MEXICO; ALLUVIAL CHANNELS; FLEXURAL ISOSTASY; BEDROCK CHANNELS; EVOLUTION; MODEL SO - Geomorphology 2003 ;55(1-4):235-247 8867 UI - 7736 AU - Montoya-Fuentes H AU - Ramirez-Munoz MD AU - Villar-Calvo V AU - Suarez-Rincon AE AU - Ornelas-Aguirre JM AU - Vazquez-Camacho G AU - Orbach-Arbouys S AU - Bravo-Cuellar A AU - Sanchez-Corona J AD - IMSS, CMNO, Ctr Invest Biomed Occidente, Div Mol Med, Guadalajara 44340, Jalisco, MexicoIMSS, CMNO, Ctr Invest Biomed Occidente, Lab Inmunol Mol,Div Inmunol, Guadalajara 44340, Jalisco, MexicoHosp Pediat, CMNO, IMSS, Dept Oftalmol Pediat, Guadalajara, Jalisco, MexicoHosp Especial, CMNO, IMSS, Dept Anat Patol, Guadalajara, Jalisco, MexicoHop Paul Brousse, Serv Pharm, F-94804 Villejuif, FranceMontoya-Fuentes, H, IMSS, CMNO, Ctr Invest Biomed Occidente, Div Mol Med, Sierra Mojada 800,Colonia Independencia,SL, Guadalajara 44340, Jalisco, Mexico TI - Identification of DNA sequences and viral proteins of 6 human papillomavirus types in retinoblastoma tissue AB - Purpose: To detect DNA and proteins of human papillomavirus (HPV) in paraffin-embedded retinoblastoma (RB) tissue, to identify the viral types present and to describe a possible association between the presence of HPV and a particular form of RB. Materials and Methods: Fifty-one samples from ocular tissues of RB patients and of six controls enucleated for nonneoplastic reasons were obtained and analyzed by Polymerase Chain Reaction (PCR) with consensus primers to detect HPV. Viral type identification was performed by Restriction Fragment Length Polymorphisms (RFLP) analysis. To corroborate the presence of HPV, immunohistochemical analysis with a polyclonal anti-HPV antibody was performed in 10 RB cases and in all controls. Results: Forty-two (82.3%) of the 51 samples were HPV-positive. HPV 6 was detected in 40 cases (95.2%), HPV 33 in 16 (38.1%), HPV 11 in 4 (9.5%) and HPV 31, 35 and 51 each in one case (2.3%). All controls were negative for HPV-DNA. The positive samples were PCR-tested for HPV 16 and 18 using specific primers, and were all negative. For immunohistochemical analysis, 7 out of 10 PCR positive samples randomly chosen were positive; all six controls were negative. Conclusion: No differences in the HPV type distribution were found between the groups formed according to the tumor presentation or to the mode of inheritance MH - France MH - Mexico|Jalisco PB - ATHENS: INT INST ANTICANCER RESEARCH RP - NOT IN FILE U3 - TC 5 U4 - Oncology U5 - J;Article AV - English IS - 0250-7005 UR - ISI:000184723400014 L2 - human papillomavirus;low-risk papillomavirus;retinoblastoma;immunohistochemistry;polymerase chain reaction;DEOXYRIBONUCLEIC-ACID; SPERM CELLS; GENE; DIFFERENTIATION; APOPTOSIS; CANCER; P53; INTEGRATION; EXPRESSION; MUTATIONS SO - Anticancer Research 2003 ;23(3C):2853-2862 8868 UI - 7403 AU - Montoya L AU - Bandala VM AU - Halling R AD - Inst Ecol, Div Sistemat, Xalapa 91000, Veracruz, MexicoNew York Bot Garden, Inst Systemat Bot, Bronx, NY 10458, USAMontoya, L, Inst Ecol, Div Sistemat, AC,AP 63, Xalapa 91000, Veracruz, Mexico TI - Lactarius furcatus in Mexico and Costa Rica AB - Fresh collections of Lactarius furcatus were gathered in Mexico and Costa Rica. The type specimen from United States (North Carolina) apparently is lost. A specimen from Tennessee, U.S.A., determined as Lactarius furcatus by A. H. Smith and kept at MICH was also studied. A description and discussion, based on recent collections, including illustrations of macro and microscopic features, are presented MH - Mexico|Veracruz MH - USA PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000185523700029 L2 - Russulaceae;taxonomy;ectomycorrhizal fungi;Lactarius subg. Piperites SO - Mycotaxon 2003 ;87():311-316 8869 UI - 8312 AU - Mookerjea B AU - Ghosh SK AU - Kaneda H AU - Nakagawa T AU - Ojha DK AU - Rengarajan TN AU - Shibai H AU - Verma RP AD - Tata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaInst Space & Astronaut Sci, Kanagawa 229, JapanNagoya Univ, Dept Phys, Nagoya, Aichi 464, JapanIndian Inst Sci, Dept Phys, Joint Astron Programme, Bangalore 560012, Karnataka, IndiaUniv Cologne, Inst Phys 1, D-50937 Cologne, GermanyInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoMookerjea, B, Tata Inst Fundamental Res, Homi Bhabha Rd, Bombay 400005, Maharashtra, India TI - Mapping of large scale 158 mu m [CII] line emission: Orion A AB - We present the first results of an observational programme undertaken to map the fine structure line emission of singly ionized carbon ([ CII] 157 : 7409 mum) over extended regions using a Fabry Perot spectrometer newly installed at the focal plane of a 100 cm balloon- borne far- infrared telescope. This new combination of instruments has a velocity resolution of similar to 200 km s(-1) and an angular resolution of 1.'5. During the first flight, an area of 30' x 15' in Orion A was mapped. These observations extend over a larger area than previous observations, the map is fully sampled and the spectral scanning method used enables reliable estimation of the continuum emission at frequencies adjacent to the [ CII] line. The total [ CII] line luminosity, calculated by considering up to 20% of the maximum line intensity is 0.04% of the luminosity of the far- infrared continuum. We have compared the [ CII] intensity distribution with the velocity- integrated intensity distributions of (CO)-C-13(1- 0), CI(1- 0) and CO( 3- 2) from the literature. Comparison of the [ CII], [ CI] and the radio continuum intensity distributions indicates that the largescale [ CII] emission originates mainly from the neutral gas, except at the position of M 43, where no [ CI] emission corresponding to the [ CII] emission is seen. Substantial part of the [ CII] emission from here originates from the ionized gas. The observed line intensities and ratios have been analyzed using the PDR models by Kaufman et al. ( 1999) to derive the incident UV flux and volume density at a few selected positions. The models reproduce the observations reasonably well at most positions excepting the [ CII] peak ( which coincides with the position of theta(1) Ori C). Possible reason for the failure could be the simplifying assumption of a homogeneous plane parallel slab in place of a more complicated geometry MH - Germany MH - India MH - Japan MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000183283300019 L2 - infrared : ISM;ISM : lines and bands;ISM : individual (Orion A);C-II LINE; MOLECULAR CLOUD; PHOTODISSOCIATION REGIONS; CARBON-MONOXIDE; M42; GAS; SPECTROSCOPY; GALAXIES; NEBULA; RATIO SO - Astronomy & Astrophysics 2003 ;404(2):569-578 8870 UI - 6900 AU - Mora M AU - Forgionne G AU - Gupta J AU - Cervantes F AU - Gelman O AD - UNAM, UAA&DEPFI, Aguascalientes 20100, AGS, Mexico. UMBC, Catonsville, MD 21250, USA. UAH, Huntsville, AL 35899, USA. ITAM, M Contreras, Mexico City 04510, DF, Mexico. UNAM, CASTD, Tlalpan 10700, DF, Mexico TI - A framework to assess intelligent decision-making support systems AB - A new framework to identify and classify the support capabilities provided by the full range of Decision-Making Support Systems is posed. This framework extends a previously reported framework by the same authors. The new framework adds a dimension of user interface support capabilities to the data, information and knowledge representation and processing capabilities dimensions of the previous framework. With this conceptual tool, an analysis of the achievements realized and a research agenda for the next generation of Intelligent DMSS is developed MH - Mexico|Aguascalientes MH - Mexico|Distrito Federal MH - USA T3 - KNOWLEDGE-BASED INTELLIGNET INFORMATION AND ENGINEERING SYSTEMSLecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBX81U AV - English IS - 0302-9743 UR - ISI:000186518100009 SO - 2003 ;():59-65 8871 UI - 7084 AU - Morales-Montor J AU - Mohamed F AU - Baghdadi A AU - Baig S AU - Hallal-Challeros C AU - Damian RT AD - Univ Georgia, Dept Cell Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30602, USAMorales-Montor, J, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, AP, Mexico City 04510, DF, Mexico TI - Expression of mRNA for interleukin-1 beta, interleukin-6, tumor necrosis factor-alpha and macrophage migration inhibitory factor in HPA-axis tissues in Schistosoma mansoni-infected baboons (Papio cynocephalus) AB - Cytokines may regulate the function of the hypothalamic-pituitary-adrenal axis during schistosomiasis. This possibility was investigated in baboons experimentally infected with Schistosoma mansoni. Serum levels of corticotrophin-releasing hormone, adrenocorticotrophin, cortisol and dehydroepiandrosterone were confirmed to be decreased in infected baboons as previously shown. To explore if this effect is associated with specific expression of cytokines with endocrine activity, and are also associated with the pathology of the disease, Northern blots for interleukin-1beta, interleukin-6, tumor necrosis factor-alpha and macrophage migration inhibitory factor in hypothalamic-pituitary-adrenal axis tissues were performed. Infection induced interleukin-1beta gene expression in the hypothalamus, while interleukin-6 and migration inhibitory factor mRNAs were induced only in the pituitary and adrenal glands. Tumor necrosis factor-alpha gene expression was induced in the hypothalamus and the pituitary gland. Histopathological analysis of the hypothalamic-pituitary-adrenal axis tissues in infected and control baboons revealed no morphological differences between them. These results suggest that specific cytokines expressed in hypothalamic-pituitary-adrenal axis tissues could regulate hormone secretion during schistosomiasis. (C) 2003 Australian Society for Parasitology Inc. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Parasitology U5 - J;Article AV - English IS - 0020-7519 UR - ISI:000186387500008 L2 - Schistosoma mansoni;schistosomiasis;hypothalamic-pituitary-adrenal axis;interleukin-1 beta;interleukin-6;migration inhibitory factor;tumor necrosis factor-alpha;corticotrophin releasing hormone;adrenocorticotrophic hormone;cortisol;dehydroepiandrosterone;baboon;PITUITARY-ADRENAL AXIS; CORTICOTROPIN-RELEASING HORMONE; ADRENOCORTICAL AXIS; IMMUNE-SYSTEM; GRANULOMA; CYTOKINES; PATHOGENESIS; EXPOSURES; IL-1-BETA; ANUBIS SO - International Journal for Parasitology 2003 ;33(13):1515-1524 8872 UI - 8753 AU - Morales-Sanchez E AU - Prokhorov E AU - Gonzalez-Hernandez J AU - Vorobiev Y AU - Rangel JH AU - Kostylev S AD - IPN, CINVESTAV, Unidad Queretaro, Juriquilla 76230, Queretaro, MexicoUAQ, Fac Ingn, Div Estudios Posgrado, Queretaro, MexicoEnergy Convers Devices, Troy, MI 48084, USAProkhorov, E, IPN, CINVESTAV, Unidad Queretaro, Juriquilla 76230, Queretaro, Mexico TI - Effects of contacts on the electrical characterization of amorphous chalcogenide alloys AB - The comparison of the electrical parameters in amorphous chalcogenide, obtained using three different methods (electrical impedance, d.c. and the four-point resistivity measurements), has shown that impedance measurement is the most appropriate because it is able to separate the contributions of the bulk and contacts. For that reason, impedance measurements provide the real values for the electrical parameters of the material. In addition, the impedance measurements were able to detect the initial stages of the amorphous-to-crystalline phase transition. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000181956100002 L2 - amorphous alloys;contact;impedance measurements;ROUGH INTERFACE; AC RESPONSE; THIN-FILMS; CONDUCTIVITY; CRYSTALLINE; SEMICONDUCTORS; DEPENDENCE; IMPEDANCE; SURFACE; SYSTEM SO - Vacuum 2003 ;70(4):483-492 8873 UI - 8804 AU - Morales-Vela B AU - Padilla-Saldivar JA AU - Mignucci-Giannoni AA AD - El Colegio Frontera Sur, Quintana Roo 77049, MexicoUniv Metropolitana, Dept Sci & Technol, Caribbean Marine Mammal Lab, San Juan, PR 00936, USAMorales-Vela, B, El Colegio Frontera Sur, Unidad Chetumal Carr Chetumal Bacalar Km 2 Zona I, Quintana Roo 77049, Mexico TI - Status of the manatee (Trichechus manatus) along the northern and western coasts of the Yucatan Peninsula, Mexico AB - The status of manatees along the northern and western coasts of the Yucatan Peninsula is poorly known. The objective of this study was to gather information about the distribution and abundance of manatees in this region. We interviewed local fishermen and authorities along the northern coast of the Peninsula in December 1999 and made three aerial surveys over the northern and western coasts of the Peninsula in March, August, and October 2000. Interviews suggest that manatee abundance was much higher in the past and that possible causes for population decline included hunting for local consumption and increased fishing, which entangled and frightened manatees. None of those interviewed had seen manatees in the last five years and we saw only one adult manatee. Manatee abundance along the northern and western coasts of the Yucatan Peninsula is very low despite the presence of adequate habitat along the northern coast of Quintana Roo, from El Cuyo to Yalahau Lagoon; along the northern coast of Yucatan, from Dzilam de Bravo to Rio Lagartos; along the western coast of the Peninsula, from Celestun to Champoton; and in the Terminos Lagoon. The recovery of the manatee population will require a multidisciplinary and long-term regional conservation plan that must consider various social and economic aspects MH - Mexico|Quintana Roo MH - USA PB - MAYAGUEZ: UNIV PUERTO RICO, RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation U5 - J;Article AV - English IS - 0008-6452 UR - ISI:000182023300005 L2 - HABITAT USE SO - Caribbean Journal of Science 2003 ;39(1):42-49 8874 UI - 9051 AU - Morales M AU - Hernandez S AU - Cornabe T AU - Revah S AU - Auria R AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Mexico City 09340, DF, MexicoUniv Aix Marseille 1, ESIL, CESB,Inst Rech Dev, Microbiol Lab, F-13288 Marseille 09, FranceInst Mexicano Petr, Programe Medio Ambiente & Seguridad, Mexico City 07730, DF, MexicoRevah, S, Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Effect of drying on biofilter performance: Modeling and experimental approach AB - The moisture content of biofilter media is a key parameter for its adequate performance. Control of moisture requires a better understanding of the drying of the support due to changes in inlet air temperature and relative humidity and from metabolic heat production by pollutant oxidation. A dynamic one-dimensional model was developed to describe drying and its effect on biofilter performance. Mass and energy balances were established on an elementary representative volume. The biological reaction term incorporated temperature, water content, and pollutant concentration effects. The model describes the variations in pollutant concentration, air relative humidity, temperature, and water content of the media. It predicts (1) water evaporation from the packing material as a consequence of metabolic heat generation and variations of the relative humidity of the inlet air stream, and (2) the resulting decrease in biofilter performance. The model was validated with biofiltration experiments treating gaseous toluene using peat as support. Various ranges of inlet air relative humidity, temperature, air velocity, and inlet pollutant concentration were assayed MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0013-936X UR - ISI:000181258600040 L2 - TOLUENE VAPORS; WATER-CONTENT; WASTE GASES; TRANSIENT CONDITIONS; BIOLOGICAL FILTER; BIOFILTRATION; REMOVAL; TRANSPORT; DEGRADATION; COMPOST SO - Environmental Science & Technology 2003 ;37(5):985-992 8875 UI - 8182 AU - Morales P AU - Thurston CF AD - Coll Postgrad, Puebla 72001, MexicoUniv London Kings Coll, Div Life Sci, London SE1 9NN, EnglandMorales, P, Coll Postgrad, Campus Puebla,Apartado Postal 701, Puebla 72001, Mexico TI - Efficient isolation of genes differentially expressed on cellulose by suppression subtractive hybridization in Agaricus bisporus AB - The production of cellulases on minimal medium in the edible mushroom Agaricus bisporus is regulated by the carbon source: induced by cellulose and repressed by glucose. In order to isolate cellulose-growth specific sequences, a cDNA library from A. bisporus using suppression subtractive hybridization (SSH) was constructed. Northern blot analysis indicated that a high level of enrichment was achieved; 183 clones were isolated. A preliminary screen with cellulosespecific genes of A. bisporus (cell, cel2, cel3 and cel4) using Southern hybridization resulted in 28 clones to be cel3, and 5 clones were cel2. The remaining 144 clones were sequenced. Partial sequences of the following genes were found: a beta-glucosidase homologue of the blvk gene of Kluyveromyces marxianus; a cellulase homologue of an endoglucanase (avicellase III) of Aspergillus aculeatus, four different xylanases homologue of the xyn genes of different fungi, and one hexose transporter homologue to the hxtA gene of Aspergillus parasiticus. The apparent full-length of two hydrophobins homologue to the abh3 gene of A. bisporus and one historic homologue to the h2a gene of Aspergillus niger were also found. The remaining sequences did not have homology to any known genes MH - United Kingdom MH - Mexico|Puebla PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 5 U4 - Mycology U5 - J;Article AV - English IS - 0953-7562 UR - ISI:000183658200004 L2 - BETA-GLUCOSIDASE GENE; CARBON SOURCE; PROTEIN; TRANSCRIPTION; HYDROPHOBINS; SEQUENCE; MUSHROOM; CLONING SO - Mycological Research 2003 ;107():401-407 8876 UI - 7333 AU - Morales R AU - Sichen D AU - Seetharaman S AD - UMSNH, Inst Invest Met, Morelia 58000, Michoacan, MexicoRoyal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, SwedenMorales, R, UMSNH, Inst Invest Met, Santiago Tapia 403, Morelia 58000, Michoacan, Mexico TI - Reduction kinetics of Fe2MoO4 fine powder by hydrogen in a fluidized bed AB - Iron molybdate (Fe2MoO4) powders with an average particle size of 100 mum were reduced by hydrogen using a fluidized-bed batch reactor in the temperature range of 923 to 1173 K. The extent of the reaction was followed as a function of time by gas chromatography. The fluidizing-gas velocity was set at about 1.5 times the minimum fluidization velocity. The ratio of the height of the static bed to its diameter is about 1. Under the prevailing experimental conditions, it was found that the chemical reaction was the rate-controlling factor. The activation energy for this process was 158 +/- 17 kJ/mol. The crystal size of the Fe2Mo powder produced at lower temperatures was in the nanometer range, indicating the possibility of mass production of alloys and intermetallics in the nanorange, using a fluidized bed MH - Mexico|Michoacan MH - Sweden PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000185586400024 L2 - DIFFUSION COUPLES; PHASE-DIAGRAM; FE-MO; SYSTEM; ALLOYS SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2003 ;34(5):661-667 8877 UI - 6895 AU - Morales T AU - Sawchenko PE AD - Salk Inst Biol Studies, Neuronal Struct & Funct Lab, La Jolla, CA 92037, USAFdn Med Res, La Jolla, CA 92037, USAUNAM, Inst Neurobiol, Juriquilla 76230, Qro, MexicoSawchenko, PE, Salk Inst Biol Studies, Neuronal Struct & Funct Lab, 10010 N Torrey Pines Rd, La Jolla, CA 92037 USA TI - Brainstem prolactin-releasing peptide neurons are sensitive to stress and lactation AB - Prolactin-releasing peptide (PrRP) was originally thought to participate in the control of adenohypophyseal prolactin secretion, but its predominant expression in a subset of medullary noradrenergic neurons is more in line with roles in interoceptive and/or somatosensory information processing. To better define functional contexts for this peptide system, immuno- and hybridization histochemical methods were used to monitor the capacity of PrRP neurons to display activational responses to lactation, suckling, acute footshock or hypotensive hemorrhage. PrRP mRNA signal was reduced in the medulla of lactating dams, relative to both male and diestrus female controls, with cell counts revealing 42% and 43% reductions in the number of positively hybridized cells in the nucleus of the solitary tract (NTS) and ventrolateral medulla, respectively. Lactating mothers killed after a 90 min suckling episode (following 4 h pup removal) failed to show induced Fos expression in identified medullary PrRP neurons, despite the fact that responsive neurons were detected in other aspects of the caudal NTS. By contrast, acute exposure to hypotensive (25%) hemorrhage or footshock each activated substantial complements of medullary neurons expressing PrRP mRNA. A substantially greater fraction of the total medullary PrRP population exhibited sensitivity to footshock than hemorrhage (71 versus 39%, respectively). These results suggest that medullary PrRP neurons are negatively regulated by (presumably hormonal) changes in lactation, and are not recruited to activation by suckling stimuli. These populations exhibit differential sensitivity to distinct acute stressors, and may participate in the modulation of adaptive neuroendocrine and autonomic responses to each. (C) 2003 IBRO. Published by Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000186584200022 L2 - stress;PrRP;lactation;nucleus of the solitary tract;ventrolateral medulla;catecholamine neurons;PARAVENTRICULAR NUCLEUS; NEUROSECRETORY NEURONS; FOOD-INTAKE; RAT-BRAIN; HORMONE; HYPOTHALAMUS; EXPRESSION; ADRENOCORTICOTROPIN; IMMUNOREACTIVITY; STIMULATION SO - Neuroscience 2003 ;121(3):771-778 8878 UI - 6684 AU - Moran C AU - Garcia-Hernandez E AU - Barahona E AU - Gonzalez S AU - Bermudez JA AD - Hlth Res Council, Mexican Inst Social Secur, Mexico City, DF, MexicoMoran, C, 413 Interamer Blvd,WH1,PMB 67-139, Laredo, TX 78045, USA TI - Relationship between insulin resistance and gonadotropin dissociation in obese and nonobese women with polycystic ovary syndrome AB - Objective: To test the interdependence between insulin resistance (IR) and gonadotropin dissociation (GD) in polycystic ovary syndrome (PCOS). Design: Cross-sectional prospective study. Setting: Clinical research center. Patient(s): Thirty-two PCOS patients aged 19-34 years; 16 obese (BMI greater than or equal to 27) and 16 nonobese (BMI < 27). Intervention(s): A 75-g oral glucose tolerance test (OGTT) and a 100-mug i.v. GnRH test were performed on different days. Blood was taken at 0, 30, 60, 90, 120, and 180 minutes in each test. Serum glucose, insulin, LH, and FSH were measured. Main Outcome Measure(s): Area under the curve was calculated for glucose, insulin, and glucose-to-insulin ratio (GIR), and for LH, FSH, and LH-FSH ratio. Result(s): Glucose, insulin, and GIR were not modified significantly during the GnRH test, nor LH, FSH and LH-FSH ratio throughout the OGTT. There were no significant differences in GIR response of patients with and without GD, nor in LH-FSH ratio of patients with and without IR, after OGTT and GnRH test. However, obese patients with IR had a significantly larger (P<.04) area under the curve for LH-FSH ratio than those without IR after GnRH test, but not after OGTT test. Conclusion(s): Insulin resistance and GD do not appear to be related events in PCOS, suggesting that each one might be determined by different genetic disorders. However, IR can affect GD after chronic stimulation in obese patients. (C) 2003 by American Society for Reproductive Medicine MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000187284200027 L2 - hyperandrogenism;insulin resistance;polycystic ovary syndrome;FOLLICLE-STIMULATING-HORMONE; BODY-FAT DISTRIBUTION; LUTEINIZING-HORMONE; ALLELIC VARIANTS; GENE; SECRETION; DISEASE; HYPERINSULINEMIA; RECEPTOR; GLUCOSE SO - Fertility and Sterility 2003 ;80(6):1466-1472 8879 UI - 7144 AU - Moran C AU - Azziz R AD - Hlth Res Council, Mexican Inst Social Secur, Mexico City, DF, MexicoUniv Alabama, Dept Obstet & Gynecol, Div Reprod Biol & Endocrinol, Birmingham, AL 35294, USAUniv Alabama, Dept Med, Div Reprod Biol & Endocrinol, Birmingham, AL 35294, USAAzziz, R, Cedars Sinai Med Ctr, Dept Obstet & Gynecol, 8635 W 3rd St,Suite 160W, Los Angeles, CA 90048 USA TI - 21-hydroxylase-deficient nonclassic adrenal hyperplasia: The great pretender AB - Polycystic ovary syndrome (PCOS) affects about 4 to 6% of women of reproductive age and accounts for at least 75% of hyperandrogenic patients. PCOS is diagnosed by the presence of oligo-ovulation and hyperandrogenism after the exclusion of related disorders, such as 21-hydroxylase-deficient nonclassic adrenal hyperplasia (NCAH). In turn, NCAH is a homozygous recessive disorder, diagnosed by a corticotropin-stimulated 17-hydroxyprogesterone (17-HP) level greater than 10 ng/mL (30.3 nmol/L) and confirmed by genotyping of the CYP21 gene. The prevalence of NCAH is approximately 50 times less than that of PCOS, affecting between 1 and 10% of hyperandrogenic women, depending on ethnicity. However, it is generally difficult to distinguish NCAH from PCOS solely on clinical grounds, as both demonstrate varying degrees of hyperandrogenism and ovulatory dysfunction. Most PCOS patients have insulin resistance, in contrast to those with NCAH. Likewise, polycystic ovaries are observed in up to 40% of NCAH patients. Both disorders have a strong familial component. The only method that allows the separation of NCAH from PCOS patients is the measurement of 17-HP levels. In conclusion, PCOS and NCAH have differences in prevalence and pathophysiology. However, because the disorders have significant clinical and hormonal similarities, the measurement of 17-HP, preferably basally as a screening method, should be incorporated into the evaluation of all hyperandrogenic patients MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: THIEME MEDICAL PUBL INC RP - NOT IN FILE U3 - TC 4 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 1526-8004 UR - ISI:000186130100006 L2 - polycystic ovary syndrome;adrenal hyperplasia;hyperandrogenism;POLYCYSTIC-OVARY-SYNDROME; INSULIN-RESISTANCE; HIRSUTE WOMEN; 11-BETA-HYDROXYLASE DEFICIENCY; 17-HYDROXYPROGESTERONE LEVELS; HYPERANDROGENIC WOMEN; ANDROGEN EXCESS; PREVALENCE; DIAGNOSIS; MULTICENTER SO - Seminars in Reproductive Medicine 2003 ;21(3):295-300 8880 UI - 7441 AU - Morelli E AU - Moron MA AD - Univ Republica, Fac Ciencias, Dept Biol Anim, Montevideo 10773, UruguayInst Ecol AC, Dept Entomol, Xalapa 91000, Veracruz, MexicoMorelli, E, Univ Republica, Fac Ciencias, Dept Biol Anim, Montevideo 10773, Uruguay TI - Descriptions of Xyloryctes hope larvae with a key to species based on the third stage larvae (Coleoptera : Scarabaeida : Dynastinae) AB - The third instar larvae of Xyloryctes furcatus Burmeister from Hidalgo, Mexico and X. lobicollis Burmeister from Chiapas, Mexico, are described. Drawings of diagnostic structures and a key to the third stage larvae of Xyloryctes jamaicensis (Drury), X. thestalus Bates, X. furcatus and X. lobicollis, are included MH - Mexico|Veracruz MH - Uruguay PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000185408300007 SO - Coleopterists Bulletin 2003 ;57(3):289-295 8881 UI - 7898 AU - Moreno-Armenta MG AU - Mancera L AU - Takeuchi N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUNAM, CCMC, San Ysidro, CA 92143, USAUniv Nacl Colombia, Dept Fis, Bogota, ColombiaMoreno-Armenta, MG, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22800, Baja California, Mexico TI - First principles total energy calculations of the structural and electronic properties of ScxGa1-xN AB - Using first principles total energy calculations within the the full-potential linearized augmented plane wave (FP-LAPW) method, we have investigated the structural and electronic properties of ScxGa1-xN, with Sc concentrations varying from 0% up to 100%. In particular we have studied the relative stability of several configurations of ScxGa1-xN in wurtzite-like structures (the ground state configuration of GaN), or in rocksalt-like structures (the ground state configuration of ScN). It is found that for Sc concentrations less than approximate to65%, the favored structure is a wurtzite-like one, while for Sc concentrations greater than approximate to65%, the favored structure is a NaCl-like structure. It is also found that for the wurtzite-like crystals, the fundamental gap is large and direct. For the rocksalt crystals the fundamental gap is small and indirect, but with an additional larger direct gap. In agreement with the experiments of Little and Kordesch [Appl. Phys. Lett. 78, 2891 (2001)] we found a decrease of the band gap with the increase of the Sc concentration MH - Colombia MH - Mexico|Baja California MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000184144000017 L2 - GENERALIZED GRADIENT APPROXIMATION; LIGHT-EMITTING DEVICES; III-V NITRIDES; SCANDIUM NITRIDE; GALLIUM NITRIDE; SCN; GROWTH; MICROSTRUCTURE; SEMICONDUCTORS; PHASE SO - Physica Status Solidi B-Basic Solid State Physics 2003 ;238(1):127-135 8882 UI - 7396 AU - Moreno-Espinosa S AU - Jiang X AU - Guerrero ML AU - Farkas T AU - Ortega H AU - Meinzen-Derr J AU - Tuz F AU - Zhong WM AU - Del Monte J AU - Reyes L AU - Pickering LK AU - Morrow AL AU - Ruiz-Palacios GM AD - Childrens Hosp, Med Ctr, Cincinnati, OH 45229, USANatl Inst Nutr, Mexico City, DF, Mexico TI - Natural history of Human Calicivirus infection in a cohort of Mexican children MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000181897901831 SO - Pediatric Research 2003 ;53(4):321A-321A 8883 UI - 7041 AU - Moreno-Gonzalez J AU - Crossa J AU - Cornelius PL AD - Ctr Invest Agrarias Mabegondo, La Coruna, SpainCIMMYT, Biomet Stat Unit, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Kentucky, Dept Agron, Lexington, KY 40546, USAUniv Kentucky, Dept Stat, Lexington, KY 40546, USACrossa, J, Ctr Invest Agrarias Mabegondo, Apartado 10, La Coruna, Spain TI - Additive main effects and multiplicative interaction model: I. Theory on variance components for predicting cell means AB - Many studies have shown the practical advantages of applying the additive main effects and multiplicative interaction (AMMI) model to multienvironment trials; however, a theory about the contributions of error and genotype X environment interaction (GEI) variance components to interaction principal components (PCs) in AMMI models is needed. The objectives of this work were to (i) develop an eigenvalue partition (EVP) method for separating variation attributable to each AMMI interaction PC into interaction variance and error variance components: (ii) develop root mean square predictive difference (RMSPD) on the basis of the EVP theory (RMSPEVP), for selecting the best truncated AMMI model; (iii) apply the RMSPDEVP criterion to three multienvironment cultivar trials and to simulation data generated for selecting the best truncated AMMI model; and (iv) validate the EVP method by comparing results of the RMSPDEVP criterion with those obtained with the criterion conventionally used to choose a truncated AMMI model by cross validation (RMSPDcv). A data resampling method was devised to estimate the contribution of error variance to the eigenvalues. The coefficients or the structural GEI variance component were always larger than those of the error variance component for the earlier PC axes. As the error associated with the cell means decreased and the number of replications increased, the portion of the cumulative GEI explained by the earlier AMMI PC axes generally increased, whereas the portion of the error sum of squares (SS) explained by the earlier AMMI PC axes decreased. The RMSPDEVP and RMSPDCV methods selected similar truncated AMMI models. The RMSPDEVP criterion is useful for selecting the best truncated AMMI models with the advantage that it can be applied to all trial replications MH - Mexico|Distrito Federal MH - Spain MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000186477700009 L2 - ENVIRONMENT CULTIVAR TRIALS; YIELD TRIALS; SELECTION; SUCCESS SO - Crop Science 2003 ;43(6):1967-1975 8884 UI - 7042 AU - Moreno-Gonzalez J AU - Crossa J AU - Cornelius PL AD - CIMMYT, Biomet & Stat Unit, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoCtr Invest Agrarias Mabegondo, La Coruna, SpainUniv Kentucky, Dept Agron, Lexington, KY 40546, USAUniv Kentucky, Dept Stat, Lexington, KY 40546, USACrossa, J, CIMMYT, Biomet & Stat Unit, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Additive main effects and multiplicative interaction model: II. Theory on shrinkage factors for predicting cell means AB - A shrinkage estimation method, herein named the CCC method, for multiplicative models has been shown to improve predictions of cell means in multienvironment cultivar trials; however, better estimations of shrinkage factors are needed. Objectives of this study were (i) to develop shrinkage factors for AMMI (Additive Main effect and Multiplicative Interaction) multiplicative terms based on the eigenvalue partition (EVP) method and (ii) to compare AMMI models fitted by EVP and CCC shrinkage methods, unshrunken AMMI models chosen by cross validation, and best linear unbiased prediction (BLUP) based on a fixed main effects and random genotype X environment interaction (GEI) model. The prediction methods were applied to three multienvironment cultivar trials, and also to simulated data. The four alternative prediction methods were compared by cross validation with the root mean squared predictive difference (RMSPD). According to the RMSPD cross validation criterion, the EVP shrinkage estimation method produced the most accurate predictions in almost all cases. When error variance was of a small to moderately large magnitude, results for EVP and CCC methods were in close agreement, CCC being slightly worse; EVP became better as error variance became very large, probably because of the unreliability of Gollobs degrees of freedom as a measure of error variance absorption by the principal components (PC) when data are extremely noisy. Shrunken EVP models were generally more predictively accurate than truncated least squares-fitted AMMI models and BLUPs, which was also true for CCC except when error variance was large. The EVP shrinkage method appears to be promising for obtaining improved predictions of cultivar performance in multienvironment cultivar trials MH - Mexico|Distrito Federal MH - Spain MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000186477700010 L2 - ENVIRONMENT CULTIVAR TRIALS; YIELD TRIALS; SELECTION; VARIANCE; SUCCESS SO - Crop Science 2003 ;43(6):1976-1982 8885 UI - 6523 AU - Moreno-Mendoza N AU - Harley V AU - Merchant-Larios H AD - Natl Autonomous Univ Mexico, Dept Cell Biol & Physiol, Inst Invest Biomed, Mexico City 04510, DF, MexicoMonash Med Ctr, Prince Henrys Inst Med Res, Clayton, Vic 3168, AustraliaMerchant-Larios, H, Natl Autonomous Univ Mexico, Dept Cell Biol & Physiol, Inst Invest Biomed, Apartado Postal 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Cell aggregation precedes the onset of Sox9-expressing preSertoli cells in the genital ridge of mouse AB - Sox9 is expressed at the onset of the genital ridge formation in both sexes. It is assumed that Sry, the testis determining gene, turns Sox9 on in male embryos because it is turned off in female embryos. Spatial expression of Sry follows a cranio-caudal pattern. Here, we asked if Sox9 is expressed in the same cell lineage and with a similar pattern as Sry. A correlative study between the structural changes in the genital ridge and the immunocytochemical localization of Sox9-positive cells was undertaken. We used a transgenic strain expressing the green fluorescent protein (GFP) that considerably enhanced the cell context where the first Sox9-positive cells appear. Although Sox9-positive cells are located among loose mesenchymal cells by stages of 8-14 tail somites (ts) in both sexes, they are absent in the thickening coelomic epithelium of females. At 15 ts the first Sox9-positive cells appear within the core of the condensed cells only in male genital ridges. At 17 ts, a gradient of Sox9-positive cells in males is apparent, closely following the cranio-caudal pattern of cell aggregation seen in genital ridges of both sexes. Hence, our results suggest that Sox9 is expressed only in loose mesenchymal cells in both sexes and that expression of Sox9 in males requires the prior aggregation of cells in the genital ridges. The correspondence of Sox9 and Sry pattern of expression supports that both genes are expressed in the preSertoli cell lineage in the core of the genital ridges. Copyright (C) 2003 S. Karger AG, Basel MH - Australia MH - Mexico|Distrito Federal PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 5 U4 - Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1424-8581 UR - ISI:000187808800006 L2 - SEX-DETERMINING GENE; TRANSGENIC MICE; SERTOLI CELLS; EXPRESSION; SRY; SOX9; GONAD SO - Cytogenetic and Genome Research 2003 ;101(3-4):219-223 8886 UI - 8123 AU - Moreno E AU - Gonzalez G AU - Leija L AU - Rodriguez O AU - Castillo M AU - Fuentes M AD - Inst Cibernet Matemat & Fis, Havana, CubaIPN, Ctr Invest & Estudios Avanzados, Mexico City 07738, DF, MexicoUNAM, Inst Invest Matemat Aplicadas & Sistemas, Mexico City, DF, MexicoMoreno, E, Inst Cibernet Matemat & Fis, Havana, Cuba TI - Performance analysis of ultrasono-therapy transducer with contact detection AB - The performance of ultrasono-therapy transducer with contact detection by using the impedance phase change is described. Usually a therapy transducer is designed with a lambda/2 frontal plate glued to a PZT-4 piezoceramic. This plate ensures a good mechanical protection of the piezoceramic with a corresponding high-transmission energy. Normally this transducer is operated at the minimum at the frequency of the impedance module of its input electric impedance, but this operation point is affected by the shift caused by the expected temperature increase. This shift could be higher than the narrow bandwidth presented. As a result we obtain a decrease in the power level for medical treatment. Usually it is designed electronic drivers with automatic control that follow the frequency change, but the relatively narrow bandwidth introduces difficulty in the design. Another frequency operation point is presented here and analyzed using the criteria of the maximum of the impedance phase with a wider bandwidth than in the previous case. Simulation with mechanical losses are presented with experimental results that show the convenience of this criteria for practical application MH - Cuba MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Acoustics;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-3010 UR - ISI:000183765700022 SO - Ieee Transactions on Ultrasonics Ferroelectrics and Frequency Control 2003 ;50(6):743-747 8887 UI - 8538 AU - Moreno E AU - Acevedo P AU - Castillo M AD - Univ Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 01000, DF, MexicoCITMA, ICIMAF, Ultrason Ctr, Havana 10400, CubaAcevedo, P, Univ Nacl Autonoma Mexico, IIMAS, DISCA, Apdo Postal 20726 Admon 20, Mexico City 01000, DF, Mexico TI - Pulse propagation in plate elements AB - This paper describes a theoretical and experimental study of pulse propagation in plates. Specifically, this approach uses the Fourier-Laplace Transform (FLT), for the solution of the Lame equation with the boundary condition given by the transducer over one side of the plate. It is shown that a pulse in plates is formed by three fundamental components with its own dispertion relationship. Experiments were performed in elastic plates to validate the model. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Mechanics U5 - J;Article AV - English IS - 0997-7538 UR - ISI:000182707800008 L2 - Lamb waves;Pulses in plates SO - European Journal of Mechanics A-Solids 2003 ;22(2):283-294 8888 UI - 6831 AU - Moreno G AU - Altes A AU - Ochoa C AD - Univ Alcala de Henares, Dipartimento Biol Vegetale, E-28871 Alcala De Henares, SpainUniv Autonoma Baja California, Fac Ciencias, Herbario BCMEX, Ensenada 22800, Baja California, MexicoMoreno, G, Univ Alcala de Henares, Dipartimento Biol Vegetale, E-28871 Alcala De Henares, Spain TI - Notes on some type materials of Disciseda (Lycoperdaceae) AB - Type collections of four species of Disciseda have been carefully re-examined. This has lead us to propose the synonyms Disciseda pedicellata = D. hyalothrix and D. arida = D. verrucosa. Our findings are supported by photographs of the macroscopic characters and spore ornamentation with scanning electron microscope of the collections studied MH - Mexico|Baja California MH - Spain PB - LEIDEN: RIJKSHERBARIUM RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0031-5850 UR - ISI:000186820000006 L2 - MEXICO SO - Persoonia 2003 ;18():215-223 8889 UI - 7605 AU - Moreno J AU - Osorno JL AD - CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, E-28006 Madrid, SpainUniv Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, MexicoMoreno, J, CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, J Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Avian egg colour and sexual selection: does eggshell pigmentation reflect female condition and genetic quality? AB - Avian egg colour has been explained as mainly serving crypsis or mimetism, although the function of certain colours (e.g. blue and green) has not yet been demonstrated. We interpret egg colour as a sexually selected signal of the laying female's genetic quality to its mate in order to induce a higher allocation of paternal care. The blue-green pigment biliverdin is an antioxidant, the deposition of which may signal antioxidant capacity whereas the deposition of the brown pigment protoporphyrin, a pro-oxidant, may signal tolerance of oxidative stress. Egg ground colour is presumably heritable and phylogenetically labile. The hypothesis can be applied to animals with colourful eggs and paternal care MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 29 U4 - Ecology U5 - J;Article AV - English IS - 1461-023X UR - ISI:000185095600002 L2 - antioxidants;birds;differential allocation;egg colour;eggshell pigments;health;paternal care;phylogenetic lability;sexual selection;stress;OXIDATIVE STRESS; BIPARENTAL CARE; JAPANESE-QUAIL; BLUE EGGS; BIRDS; VARIABILITY; PREDATION; MALES SO - Ecology Letters 2003 ;6(9):803-806 8890 UI - 7369 AU - Moreno M AU - Rosas A AU - Alcaraz J AU - Hernandez M AU - Toppi S AU - Da Costa P AD - Univ Paris 06, Lab React Surface, UMR 7609, F-75252 Paris 05, FranceNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoDa Costa, P, Univ Paris 06, Lab React Surface, UMR 7609, 4 Pl Jussieu,Case 178, F-75252 Paris 05, France TI - Identification of the active acid sites of fluorinated alumina catalysts dedicated to n-butene/isobutane alkylation AB - The acid-base properties of pure and fluorinated alumina (0.6-22 wt.%) were determined by temperature-programmed desorption of NH3 and by infrared spectroscopy (IR) of adsorbed pyridine and 2,6-dimethylpyridine. No direct correlation between total acidity of materials and catalytic activity in the alkylation of n-butene by isobutane was observed. However, a good correlation between Bronsted acidity and the catalytic activity was obtained. Indeed, the higher the overall Bronsted acidity is the higher their activity in the alkylation reaction increases. Moreover, inactive catalysts in alkylation were obtained by neutralizing selectively the Bronsted sites created by F-addition with sodium ions. From physical characterizations such as FTIR, it was proposed that the active Bronsted sites are associated to aluminium hydroxyfluorides formed during the catalysts preparation on low F-containing catalysts. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000185715100015 L2 - fluorinated alumina;alkylation;acidity;FTIR;pyridine;2,6-dimethylpyridine;Bronsted sites;ISOBUTANE/2-BUTENE ALKYLATION; SOLID ACID; ZEOLITE-BETA; 2-BUTENE; TEMPERATURE; ADSORPTION; 2,6-DIMETHYLPYRIDINE; PARAMETERS; BUTENE SO - Applied Catalysis A-General 2003 ;251(2):369-383 8891 UI - 9251 AU - Moreno MD AD - Inst Nacl Senectud, Mexico City, DF, MexicoMoreno, MD, Italfarmaco SpA, Dept Sci, Via Lavoratori 54, I-20092 Milan, Italy TI - Cognitive improvement in mild to moderate Alzheimer's dementia after treatment with the acetylcholine precursor choline alfoscerate: A multicenter, double-blind, randomized, placebo-controlled trial AB - Background: Parallel with the development of hypotheses regarding cholinergic involvement in geriatric memory dysfunction, the first attempts to treat patients with Alzheimer's disease (AD) involved the cholinergic-precursor loading approach. Despite encouraging early results, well-controlled clinical trials did not confirm a clinical utility of cholinergic precursors such as choline and lecithin (phosphatidylcholine) in AD. Objective: This study assessed the efficacy and tolerability of the cholinergic precursor choline alfoscerate (CA) in the treatment of cognitive impairment due to mild to moderate AD. Methods: In this multicenter, double-blind, randomized, placebo-controlled trial, patients affected by mild to moderate dementia of the Alzheimer type were treated with CA (400-mg capsules) or placebo capsules, 3 times daily, for 180 days. Efficacy outcome measures that were assessed at the beginning of the investigation and after 90 and 180 days of treatment included scores of the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-Cog), the Mini-Mental State Examination(TM) (MMSE), the Global Deterioration Scale (GDS), the Alzheimer's Disease Assessment Scale-Behavioral Subscale (ADAS-Behav), all items of the Alzheimer's Disease Assessment Scale (ADAS-Total), and the Clinical Global Impression (CGI) scale. The Global Improvement Scale (GIS) score was assessed after 90 and 180 days of treatment. Results: A total of 261 patients (132 in the CA group, 129 in the placebo group) were enrolled in the study The mean (SD) age in the CA group was 72.2 (7.5) years (range, 60-80 years), and in the placebo group it was 71.7 (7.4) years (range, 60-80 years). The CA group comprised 105 women and 27 men; the placebo group, 94 women and 35 men. The mean decrease in ADAS-Cog score in patients treated with CA was 2.42 points after 90 days of treatment and 3.20 points at the end of the study (day 180) (P < 0.001 vs baseline for both), whereas in patients receiving placebo the mean increase in ADAS-Cog score was 0.36 point less than or equal tol after 90 days of treatment and 2.90 points after 180 days of treatment (P < 0.001 vs baseline). In the CA group, all other assessed parameters (MMSE, GDS, ADAS-Behav, ADAS-Total, and CGI) consistently improved after 90 and 180 days versus baseline, whereas in the placebo group they remained unchanged or worsened. Statistically significant differences were observed between treatments after 90 and 180 days in ADAS-Cog, MMSE, GDS, ADAS-Total, and CGI scores and after 180 days of treatment in ADAS-Behav and GIS scores. Conclusion: The results of this study suggest the clinical usefulness and tolerability of CA in the treatment of the cognitive symptoms of dementia disorders of the Alzheimer type. Copyright (C) 2003 Excerpta Medica, Inc MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0149-2918 UR - ISI:000180952600011 L2 - Alzheimer's disease;cognitive impairment;choline alfoscerate;clinical trial;L-ALPHA-GLYCERYLPHOSPHORYLCHOLINE; MULTIINFARCT DEMENTIA; VASCULAR DEMENTIA; RATING-SCALE; DISEASE; EFFICACY; SAFETY; DIPHOSPHOCHOLINE; DYSFUNCTION; HYPOTHESIS SO - Clinical Therapeutics 2003 ;25(1):178-193 8892 UI - 8025 AU - Morett E AU - Korbel JO AU - Rajan E AU - Saab-Rincon G AU - Olvera L AU - Olvera M AU - Steffen S AU - Snel B AU - Bork P AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoEuropean Mol Biol Lab, D-69117 Heidelberg, GermanyMax Delbruck Ctr Mol Med, D-13092 Berlin, GermanyUniv Heidelberg, Dept Parasitol, INF 324, D-69120 Heidelberg, GermanyMorett, E, Univ Nacl Autonoma Mexico, Inst Biotechnol, Av Univ 2001, Cuernavaca 62210, Morelos, Mexico TI - Systematic discovery of analogous enzymes in thiamin biosynthesis AB - In all genome-sequencing projects completed to date, a considerable number of 'gaps' have been found in the biochemical pathways of the respective species. In many instances, missing enzymes are displaced by analogs, functionally equivalent proteins that have evolved independently and lack sequence and structural similarity. Here we fill such gaps by analyzing anticorrelating occurrences of genes across species. Our approach, applied to the thiamin biosynthesis pathway comprising approximately 15 catalytic steps, predicts seven instances in which known enzymes have been displaced by analogous proteins. So far we have verified four predictions by genetic complementation, including three proteins for which there was no previous experimental evidence of a role in the thiamin biosynthesis pathway. For one hypothetical protein, biochemical characterization confirmed the predicted thiamin phosphate synthase (ThiE) activity. The results demonstrate the ability of our computational approach to predict specific functions without taking into account sequence similarity MH - Germany MH - Mexico|Morelos PB - NEW YORK: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 48 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1087-0156 UR - ISI:000183886000032 L2 - SACCHAROMYCES-CEREVISIAE; BACILLUS-SUBTILIS; ESCHERICHIA-COLI; SALMONELLA-TYPHIMURIUM; CRYSTAL-STRUCTURE; GENE; PROTEINS; PYROPHOSPHOKINASE; IDENTIFICATION; PROKARYOTES SO - Nature Biotechnology 2003 ;21(7):790-795 8893 UI - 7764 AU - Morgan-Sagastume JM AU - Noyola A AU - Revah S AU - Ergas SJ AD - Natl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Proc & Hydraul Dept, Iztapalapa, MexicoUniv Massachusetts, Dept Civil & Environm Engn, Amherst, MA 01003, USAMorgan-Sagastume, JM, Natl Autonomous Univ Mexico, Inst Engn, Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - Changes in physical properties of a compost biofilter treating hydrogen sulfide AB - A technique is presented that can be used to estimate the changes in physical structure in a natural biofilter packing medium, such as compost, over time. The technique applies information from tracer studies, grain size distribution, and pressure drop analysis to a model that estimates the number of channels, average channel diameter, number of particles, and specific surface area of the medium. Important operational factors, such as moisture content, pressure drop, and sulfate accumulation also were evaluated both in a conventionally operated biofilter and in one operated with periodic compost mixing. In the conventionally operated laboratory-scale compost biofilter, hydrogen sulfide (H2S) removal efficiency decreased from 100% to similar to90% over 206 days of operation. In a similar system, operated with compost mixing, the H2S removal efficiency was maintained near 100%. Variations in media moisture conditions and specific surface area can explain the results observed in this study. Under conventional operation, drying near the inlet disintegrated the compost particles, producing a large number of particles and flow channels and increasing the specific surface area. At the top of the column, where moisture was added, particle size increased and specific surface area decreased. In the column with media mixing, moisture content, particle size, and specific surface area remained homogeneous MH - Mexico|Distrito Federal MH - USA PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 12 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000184554900011 L2 - TRICKLE-BED; WASTE GASES; BIOFILTRATION; REMOVAL; BIOMASS; TOLUENE; MODEL; OXIDATION; EMISSIONS; KINETICS SO - Journal of the Air & Waste Management Association 2003 ;53(8):1011-1021 8894 UI - 6593 AU - Morgan J AU - Cano MV AU - Feikin DR AU - Phelan M AU - Monroy OV AU - Morales PK AU - Carpenter J AU - Weltman A AU - Spitzer PG AU - Liu HH AU - Mirza SA AU - Bronstein DE AU - Morgan DJ AU - Kirkman LA AU - Brandt ME AU - Iqbal N AU - Lindsley MD AU - Warnock DW AU - Hajjeh RA AD - Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Resp Dis Branch, Atlanta, GA 30333, USACtr Dis Control & Prevent, Natl Ctr Infect Dis, Biostat & Informat Management Branch, Div Bacterial & Mycot Dis, Atlanta, GA 30333, USACtr Dis Control & Prevent, Natl Ctr Infect Dis, Div Healthcare Qual Promot, Atlanta, GA 30333, USAMinist Hlth, Dept Epidemiol, Mexico City, DF, MexicoPenn Dept Hlth, Harrisburg, PA 17108, USABryn Mawr Med Specialists, Bryn Mawr, PA, USACtr Dis Control & Prevent, Natl Ctr Infect Dis, Mycot Dis Branch, Atlanta, GA 30333, USAMorgan, J, Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Mycot Dis Branch, 1600 Clifton Rd,Mailstop C-09, Atlanta, GA 30333 USA TI - A large outbreak of histoplasmosis among American travelers associated with a hotel in Acapulco, Mexico, spring 2001 AB - During spring 2001, college students from Pennsylvania reported an acute febrile respiratory illness after returning from spring break vacation in Acapulco, Mexico. Acute pulmonary histoplasmosis was presumptively diagnosed and the cluster of illness was reported to the Centers of Disease Control and Prevention. A large investigation then ensued, which included finding student-travelers for interviews and requesting sera for histoplasmosis testing. We defined a clinical case by fever and at least one of the following: cough, shortness of breath, chest pain, or headache, in an Acapulco traveler during March-May 2001. A laboratory-confirmed case had positive serology. An initial study determined that the likely site of histoplasmosis exposure was Hotel H; we therefore performed a large cohort study among travelers who stayed at Hotel H. Of 757 contacted, 262 (36%) met the clinical case definition. Of 273 serum specimens tested, 148 (54%) were positive. Frequent use of Hotel H's stairwells, where construction was ongoing, was associated with increased risk of illness (relative risk = 10.5, 95% confidence interval = 3.7-30.5; P < 0.001). This is the first histoplasmosis outbreak associated with a hotel undergoing construction. Hotels in endemic areas should consider construction precaution measures to prevent histoplasmosis among their guests MH - USA MH - Mexico|Distrito Federal PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000187734300018 SO - American Journal of Tropical Medicine and Hygiene 2003 ;69(6):663-669 8895 UI - 8408 AU - Moriarty SE AU - Neufeld L AU - Rivera J AU - Ramakrishnan U AD - Emory Univ, Atlanta, GA 30322, USANatl Inst Publ Hlth, Ctr res Nutr & Hlth, Cuernavaca, Morelos, MexicoEmory Univ, RSPH, Dept Int Hlth, Atlanta, GA 30322, USA TI - Multivitamin-mineral supplementation vs. iron supplementation in improving hemoglobin levels: A randomized double-blind trial conducted in non-pregnant women living in semi-rural Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796901648 SO - Faseb Journal 2003 ;17(5):A1102-A1102 8896 UI - 6998 AU - Moro AM AU - Crespo R AU - Garcia-Martinez H AU - Aguilera EF AU - Martinez-Quiroz E AU - Gomez-Camacho J AU - Nunes FM AD - Inst Super Tecn, Dept Fis, P-1049001 Lisbon, PortugalInst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Sevilla, Dept FAMN, E-41080 Seville, SpainMichigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824, USAMoro, AM, Inst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal TI - Reaction mechanisms in the scattering of Li-8 on Pb-208 around the Coulomb barrier AB - We present an analysis of the reaction Li-8+Pb-208, which has been recently measured at energies around the Coulomb barrier. The study is focused on the elastic and one-neutron removal channels. The elastic angular distribution has been analyzed by means of the optical model and coupled-channels method. The measured Li-7 yield has been assumed to come from the one-neutron transfer reaction Pb-208(Li-8, Li-7)Pb-209 and the breakup reaction Li-8+Pb-208-->n+Li-7+Pb-208. For the former, an analysis in terms of the distorted wave Born approximation and coupled-channels Born approximation (CCBA) methods has been performed. For the breakup reaction, a generalization of the CCBA method has been used, in which the final states are described as n+Pb-208 continuum states. Transfer and breakup are then treated consistently. The summed angular distribution for the two processes reproduces the shape and absolute magnitude of the measured Li-7 distribution. We conclude that most of the measured Li-7 yield comes from the one-neutron transfer channel. We also show that the elastic scattering is notably affected by the strong coupling to transfer channels MH - Mexico|Distrito Federal MH - Portugal MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000186510900059 L2 - HALO NUCLEI; FUSION; BREAKUP SO - Physical Review C 2003 ;68(3): 8897 UI - 7936 AU - Moron MA AU - Paucar-Cabrera A AD - Inst Ecol, Dept Entomol, Xalapa 91000, Veracruz, MexicoUniv Nebraska, State Museum, Lincoln, NE 68588, USAMoron, MA, Inst Ecol, Dept Entomol, AP 63, Xalapa 91000, Veracruz, Mexico TI - Larvae and pupae of species of the genus Macraspis (Coleoptera : Scarabaeidae : Rutelinae : Rutelini) AB - Third-instar larvae and pupae of Macraspis aterrima Waterhouse, Macraspis rufonitida Burmeister, and Macraspis chrysis (Linne) from Mexico and Macraspis festiva Burmeister and Macraspis pseudochrysis Landin from Brazil are described. All larvae and pupae were found in rotten logs or stumps of numerous tree species. Illustrations of diagnostic structures, brief comments on the biology of each species, and a key to the seven larvae of the genus are included MH - Mexico|Veracruz MH - USA PB - OTTAWA: ENTOMOL SOC CANADA RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0008-347X UR - ISI:000184139400001 L2 - AMERICAN GENERA; MELOLONTHIDAE; KEY SO - Canadian Entomologist 2003 ;135(4):467-491 8898 UI - 6707 AU - Morris M AU - Pingali PL AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Econ Program, Mexico City 06600, DF, MexicoUN, FAO, Rome, ItalyMorris, M, CIMMYT, Int Maize & Wheat Improvement Ctr, Econ Program, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Returns to investment in plant genetic resource conservation and crop improvement research MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Economics & Policy;Economics U5 - J;Editorial Material NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000187214000001 SO - Agricultural Economics 2003 ;29(3):239-240 8899 UI - 6708 AU - Morris ML AU - Heisey PW AD - CIMMYT, Econ Program, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUSDA, ERS, Econ Res Serv, Washington, DC 20250, USAMorris, ML, CIMMYT, Econ Program, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Estimating the benefits of plant breeding research: methodological issues and practical challenges AB - Impact assessment studies consistently show that the benefits generated by plant breeding are large, positive and widely distributed. Numerous case studies have concluded that investment in plant breeding research generates attractive rates of return compared to alternative investment opportunities, that welfare gains resulting from the adoption of modem varieties (MVs) reach both favoured and marginal environments, and that benefits are broadly shared by producers and consumers. But just how reliable are the results of studies that estimate the benefits of plant breeding research? This article reviews methods used to estimate the benefits of plant breeding research and discusses theoretical and empirical issues that often receive inadequate attention in applied impact assessment work. Our objective is not to question the validity of the theoretical frameworks commonly used to estimate the benefits of plant breeding research, but rather to examine problems that can arise when the widely accepted theoretical frameworks are used for empirical analysis. Most of these problems can be grouped into three basic categories: (1) problems associated with measuring adoption and diffusion of MVs, (2) problems associated with estimating benefits attributable to adoption of MVs, and (3) problems associated with assigning credit among the various plant breeding programmes that participated in developing the MVs. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000187214000002 L2 - agricultural research;agricultural research evaluation;plant breeding research;impact assessment;economic analysis;PRODUCTION ENVIRONMENT; IMPROVEMENT RESEARCH; MAINTENANCE; IMPACTS; INCOME SO - Agricultural Economics 2003 ;29(3):241-252 8900 UI - 7393 AU - Morrow AL AU - Ruiz-Palacios GM AU - Altaye M AU - Jiang X AU - Lourdes-Guerrero M AU - Meinzen-Derr JK AU - Farkas T AU - Chaturvedi P AU - Pickering LK AU - Newburg DS AD - Childrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USAInst Natl Ciencias Med & Nutr, Mexico City, DF, MexicoChildrens Hosp, Med Ctr, Div Infect Dis, Cincinnati, OH 45229, USAUniv Massachusetts, Sch Med, Shriver Ctr, Waltham, MA, USACtr Dis Control & Prevent, Atlanta, GA, USA TI - Human milk oligosaccharides are associated with protection against diarrhea in breast-fed infants MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000181897900952 SO - Pediatric Research 2003 ;53(4):167A-167A 8901 UI - 8082 AU - Morse BS AU - Pohll G AU - Huntington J AU - Castillo RR AD - Desert Res Inst, Reno, NV 89512, USAUniv Nevada, Grad Program Hydrol, Reno, NV, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoMorse, BS, Desert Res Inst, 2215 Raggio Pkwy, Reno, NV 89512, USA TI - Stochastic capture zone analysis of an arsenic-contaminated well using the generalized likelihood uncertainty estimator (GLUE) methodology AB - [1] In 1992, Mexican researchers discovered concentrations of arsenic in excess of World Heath Organization (WHO) standards in several municipal wells in the Zimapan Valley of Mexico. This study describes a method to delineate a capture zone for one of the most highly contaminated wells to aid in future well siting. A stochastic approach was used to model the capture zone because of the high level of uncertainty in several input parameters. Two stochastic techniques were performed and compared: "standard'' Monte Carlo analysis and the generalized likelihood uncertainty estimator (GLUE) methodology. The GLUE procedure differs from standard Monte Carlo analysis in that it incorporates a goodness of fit (termed a likelihood measure) in evaluating the model. This allows for more information (in this case, head data) to be used in the uncertainty analysis, resulting in smaller prediction uncertainty. Two likelihood measures are tested in this study to determine which are in better agreement with the observed heads. While the standard Monte Carlo approach does not aid in parameter estimation, the GLUE methodology indicates best fit models when hydraulic conductivity is approximately 10(-6.5) m/s, with vertically isotropic conditions and large quantities of interbasin flow entering the basin. Probabilistic isochrones (capture zone boundaries) are then presented, and as predicted, the GLUE-derived capture zones are significantly smaller in area than those from the standard Monte Carlo approach MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Limnology;Water Resources U5 - J;Article AV - English IS - 0043-1397 UR - ISI:000183634400003 L2 - Bayesian;capture zone;GLUE;Zimapan;GROUNDWATER POLLUTION; BAYESIAN-ESTIMATION; ZIMAPAN VALLEY; BEARING ROCKS; MODELS; CALIBRATION; PREDICTION; MEXICO SO - Water Resources Research 2003 ;39(6): 8902 UI - 7171 AU - Mortera-Gutierrez CA AU - Scholl DW AU - Carlson RL AD - Univ Nacl Autonoma Mexico, Inst Geofis, Coyoacan 04510, DF, MexicoUS Geol Survey, Menlo Pk, CA 94025, USATexas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843, USAMortera-Gutierrez, CA, Univ Nacl Autonoma Mexico, Inst Geofis, Coyoacan 04510, DF, Mexico TI - Fault trends on the seaward slope of the Aleutian Trench: Implications for a laterally changing stress field tied to a westward increase in oblique convergence AB - [1] Normal faults along the seaward trench slope (STS) commonly strike parallel to the trench in response to bending of the oceanic plate into the subduction zone. This is not the circumstance for the Aleutian Trench, where the direction of convergence gradually changes westward, from normal to transform motion. GLORIA side-scan sonar images document that the Aleutian STS is dominated by faults striking oblique to the trench, west of 179degreesE and east of 172degreesW. These images also show a pattern of east-west trending seafloor faults that are aligned parallel to the spreading fabric defined by magnetic anomalies. The stress-strain field along the STS is divided into two domains west and east, respectively, of 179degreesE. Over the western domain, STS faults and nodal planes of earthquakes are oriented oblique (9degrees-46degrees) to the trench axis and (69degrees-90degrees) to the magnetic fabric. West of 179degreesE, STS fault strikes change by 36degrees from the E-W trend of STS where the trench-parallel slip gets larger than its orthogonal component of convergence. This rotation indicates that horizontal stresses along the western domain of the STS are deflected by the increasing obliquity in convergence. An analytical model supports the idea that strikes of STS faults result from a superposition of stresses associated with the dextral shear couple of the oblique convergence and stresses caused by plate bending. For the eastern domain, most nodal planes of earthquakes strike parallel to the outer rise, indicating bending as the prevailing mechanism causing normal faulting. East of 172degreesW, STS faults strike parallel to the magnetic fabric but oblique (10degrees-26degrees) to the axis of the trench. On the basis of a Coulomb failure criterion the trench-oblique strikes probably result from reactivation of crustal faults generated by spreading MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000186090100001 L2 - Aleutian Trench;oblique convergence;stresses;faults;MOMENT TENSOR SOLUTIONS; ARC-PARALLEL EXTENSION; CURRENT PLATE MOTIONS; SIDE-SCAN SONAR; TIME-SCALE; OUTER RISE; PACIFIC; SUBDUCTION; DEFORMATION; EARTHQUAKES SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B10): 8903 UI - 7197 AU - Moshfeghi DM AU - Kaiser PK AU - Scott IU AU - Sears JE AU - Benz M AU - Sinesterra JP AU - Kaiser RS AU - Bakri S AU - Maturi RK AU - Belmont J AU - Beer PM AU - Murray TG AU - Quiroz-Mercado H AU - Mieler WF AD - Cleveland Clin Fdn, Cole Eye Inst, Cleveland, OH 44195, USAStanford Univ, Dept Ophthalmol, Stanford, CA 94305, USAUniv Miami, Sch Med, Bascom Palmer Eye Inst, Miami, FL, USAAPEC, Mexico City, DF, MexicoWills Eye Hosp & Res Inst, Philadelphia, PA, USAAlbany Med Coll, Albany, NY 12208, USAMidwest Eye Inst, Indianapolis, IN, USABaylor Coll Med, Dept Ophthalmol, Houston, TX 77030, USAKaiser, PK, Cleveland Clin Fdn, Cole Eye Inst, 9500 Euclid Ave,Desk I-32, Cleveland, OH 44195 USA TI - Acute endophthalmitis following intravitreal triamcinolone acetonide injection AB - Purpose: To report the clinical features, causative organisms, management, and visual acuity outcomes of eight eyes of eight patients who developed acute postoperative endophthalmitis following intravitreal injection of triamcinolone acetonide (IVTA). Design: Retrospective, multicenter, interventional, case series. Methods: A retrospective, interventional, case series of all patients with acute postoperative endophthalmitis following IVTA at seven academic clinical centers between March 2001 and July 2002. Results: A total of 922 IVTAs were performed. Eight eyes of eight patients with acute postoperative endophthalmitis were identified in the 6 weeks following IVTA for an incidence of 0.87% (95% confidence interval of 0.38% to 1.70%). The median time to presentation was 7.5 days (range, 1-15 days) after IVTA. The most common clinical findings were iritis (n=8), vitritis (n=8), hypopyon (n=8), pain (n=7), red eye (n=6), and decreased vision (n=5). The median presenting visual acuity was 20/1127 (range, 20/60 to light perception). Initial treatment consisted of vitreous tap and injection of antibiotics (n=6) or pars plana vitrectomy and injection of intravitreal antibiotics (n=2). Intraocular cultures yielded identification in seven patients. One demonstrated intracellular gram-positive cocci in chains with numerous polymorphonuclear cells on gram stain. The median postinfection vision was 20/400 (range, 20/40 to no light perception). Three patients ended up with no light perception visual acuity, including enucleation (n=1) and phthisis (n=1). Conclusions: Acute postoperative endophthalmitis following IVTA occurs rapidly and can result in severe loss of vision MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 125 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000186146000001 L2 - CYSTOID MACULAR EDEMA; POSTOPERATIVE ENDOPHTHALMITIS; CRYSTALLINE CORTISONE; ADJUNCTIVE TREATMENT; RETINOPATHY; VITRECTOMY; SECONDARY; GLAUCOMA SO - American Journal of Ophthalmology 2003 ;136(5):791-796 8904 UI - 6634 AU - Mostefaoui A AU - Rajsbaum S AU - Raynal M AD - IRISA, F-35042 Rennes, FranceUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMostefaoui, A, IRISA, Campus Beaulieu, F-35042 Rennes, France TI - Using conditions to expedite consensus in synchronous distributed systems AB - The condition-based approach to solve consensus has initially been developed in the context of asynchronous systems. It identifies a class of acceptable conditions on the set of input vectors that, when satisfied by the actual input vector, are exactly the conditions that allow to solve consensus despite up to t faulty processes. This paper investigates the use of conditions to solve consensus in synchronous systems prone to process crash failures. It first shows that for any acceptable condition there is a condition-based protocol solving uniform consensus that enjoys the following property: when the input vector belongs to the condition, it terminates in a single round if no process crashes, and in two rounds otherwise. When the input vector does not belong to the condition, the actual number of rounds is upper bounded by t + 1 (it actually depends on both the crash pattern and the input vector). The paper then extends the previous protocol to combine early decision with the condition-based approach. It presents a general protocol that enjoys the previous properties (decision in one or two rounds) when the input vector belongs to the condition and terminates in at most min(t + 1, f + 2) rounds when the input vector does not belong to the condition (where f is the actual number of faulty processes). Finally, the paper presents corresponding matching lower bounds. It shows that acceptable conditions are the only ones for which a consensus protocol can enjoy the previous properties MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000187498000018 L2 - UNRELIABLE FAILURE DETECTORS; TIME SO - Distributed Computing, Proceedings 2003 ;2848():249-263 8905 UI - 7214 AU - Mostefaoui A AU - Rajsbaum S AU - Raynal M AU - Roy M AD - Inst Rech Informat & Syst Aleatoires, F-35042 Rennes, FranceUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMostefaoui, A, Inst Rech Informat & Syst Aleatoires, Campus Beaulieu, F-35042 Rennes, France TI - A hierarchy of conditions for asynchronous interactive consistency AB - The condition based approach consists in identifying sets of input vectors, called conditions, for which it is possible to design a protocol solving a distributed computing problem despite failures. In a recent work we have applied the condition based approach to the interactive consistency (IC) problem (the agreement problem where the processes have to agree on the vector of proposed values), and provided a characterization of the conditions that allow us to solve it in presence of up to f(c) process crashes and f(e) erroneous proposals. We have shown that these conditions correspond exactly to error correcting codes, where the errors can be erasures or modified values. Here, we investigate this set of conditions from a complexity perspective, and show that it actually consists of a hierarchy of classes of conditions, C-fc,fe([delta]), where delta is the degree of the condition (0 less than or equal to delta less than or equal to f(c)), each class being contained in the previous one (intuitively, the value f(c) - delta represents the "difficulty" of a class) MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000185994300011 L2 - asynchronous shared memory system;atomic register;condition;crash failure;erroneous value;error-correcting code;fault-tolerance;hamming distance;interactive consistency;DISTRIBUTED SYSTEMS; FAILURE DETECTORS; CONSENSUS; AGREEMENT; FAULTS SO - Parallel Computing Technologies, Proceedings 2003 ;2763():130-140 8906 UI - 8193 AU - Mostovoy J AU - Stanford T AD - Univ Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca 62191, Morelos, MexicoNew Mexico State Univ, Dept Math Sci, Las Cruces, NM 88003, USAMostovoy, J, Univ Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, AP 273-3, Cuernavaca 62191, Morelos, Mexico TI - On a map from pure braids to knots AB - We introduce an oriented version of the plat closure and prove a Markov-type theorem for it. Some implications for Vassiliev invariants axe discussed MH - Mexico|Morelos MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0218-2165 UR - ISI:000183565900010 SO - Journal of Knot Theory and Its Ramifications 2003 ;12(3):417-425 8907 UI - 7900 AU - Mota AJ AU - Castellanos E AU - Juaristi E AD - Univ Granada, Fac Farm, Dept Quim Organ, E-18071 Granada, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoMota, AJ, Univ Granada, Fac Farm, Dept Quim Organ, Campus Cartuja, E-18071 Granada, Spain TI - Simple methodology for the purification of amino acids MH - Mexico|Distrito Federal MH - Spain PB - NEWTON HIGHLANDS: ORGANIC PREP PROCEDURES INC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0030-4948 UR - ISI:000184287100011 L2 - ENANTIOSELECTIVE SYNTHESIS; BETA-PEPTIDES SO - Organic Preparations and Procedures International 2003 ;35(4):414-417 8908 UI - 7076 AU - Moussatova A AU - Vazquez MV AU - Martinez A AU - Dolgounitcheva O AU - Zakrzewski VG AU - Ortiz JV AU - Pedersen DB AU - Simard B AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoKansas State Univ, Dept Chem, Manhattan, KS 66506, USANatl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, CanadaMartinez, A, Natl Autonomous Univ Mexico, Inst Invest Mat, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Theoretical study of the structure and bonding of a metal-DNA base complex: Al-guanine AB - Tautomerism in the most-stable isomers of Al-guanine complexes and their cations is studied with density functional theory and second-order perturbation theory calculations. Electron propagator calculations on vertical ionization energies and Dyson orbitals provide information on the electronic structure in the most-stable neutral doublets, as well as in the corresponding singlets and triplets. The Al-guanine complex consists of a positively charged At ion with two localized valence electrons coordinated to a negatively charged guanine with an unpaired, delocalized pi electron. Three isomers have very similar energies; however, the most-stable form has a markedly different ionization energy. Ionization energies for the second and third forms almost coincide. Predicted ionization energies are in close agreement with recent spectra. In all three cases, the first ionization energy corresponds to a cationic, singlet final state where the unpaired, delocalized 7 electron on guanine has been removed, whereas the second ionization energy corresponds to the removal of an electron from a 3s-like orbital on the Al ion. Changes in Mulliken charges and optimized structures between neutrals and cations confirm these qualitative conclusions MH - Canada MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000186282000021 L2 - IONIZATION ENERGIES; GAS-PHASE; ADENINE; CYTOSINE SO - Journal of Physical Chemistry A 2003 ;107(44):9415-9421 8909 UI - 8781 AU - Moya-Cessa H AU - Jonathan D AU - Knight PL AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, QOLS, London SW7 2BW, EnglandCoordinac Opt, INAOE, Puebla 72000, MexicoUniv Cambridge, Ctr Math Sci, DAMTP, Cambridge CB3 0WA, EnglandMoya-Cessa, H, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, QOLS, London SW7 2BW, England TI - A family of exact eigenstates for a single trapped ion interacting with a laser field AB - We show that, under certain combinations of the parameters governing the interaction of a harmonically trapped ion with a laser beam, it is possible to find one or more exact eigenstates of the Hamiltonian, with no approximations except the optical rotating-wave approximation. These are related via a unitary equivalence to exact eigenstates of the full Jaynes-Cummings model (including counter-rotating terms) supplemented by a static driving term MH - United Kingdom MH - Mexico|Puebla PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000182134100010 L2 - QUANTUM; STATES; MANIPULATION; REVIVALS; ATOM SO - Journal of Modern Optics 2003 ;50(2):265-273 8910 UI - 9390 AU - Moya-Cessa H AU - Jonathan D AU - Knight PL AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, QOLS, London SW7 2BW, EnglandINAOE, Puebla 72000, MexicoUniv Cambridge, DAMTP, Ctr Math Sci, Cambridge CB3 0WA, EnglandMoya-Cessa, H, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, QOLS, London SW7 2BW, England TI - A family of exact eigenstates for a single trapped ion interacting with a laser field AB - We show that, under certain combinations of the parameters governing the interaction of a harmonically trapped ion with a laser beam, it is possible to find one or more exact eigenstates of the Hamiltonian, with no approximations except the optical rotating-wave approximation. These are related via a unitary equivalence to exact eigenstates of the full Jaynes Cummings model ( including counter-rotating terms) supplemented by a static driving term MH - United Kingdom MH - Mexico|Puebla PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000180292800010 L2 - 2-LEVEL SYSTEM; QUANTUM; MANIPULATION; REVIVALS; STATES; ATOM SO - Journal of Modern Optics 2003 ;50(2):265-273 8911 UI - 8250 AU - Moya-Hernandez MR AU - Mederos A AU - Dominguez S AU - Orlandini A AU - Ghilardi CA AU - Cecconi F AU - Gonzalez-Vergara E AU - Rojas-Hernandez A AD - Univ La Laguna, Fac Farm, Dept Quim Inorgan, Tenerife, Canary Isl, SpainUNAM, Fac Estudios Superiores Cuautitlan, Cuautitlan 54740, Edo, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCNR, Ist Chim Composti Organometallici, I-50132 Florence, ItalyBenemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla 72570, MexicoMederos, A, Univ La Laguna, Fac Farm, Dept Quim Inorgan, Tenerife, Canary Isl, Spain TI - Speciation study of the anti-inflammatory drug tenoxicam (Htenox) with Cu(II): X-ray crystal structure of [Cu(tenox)(2)(py)(2)]center dot-EtOH AB - A speciation study was carried out in aqueous solution of the anti-inflammatory drug tenoxicam (Htenox), under quasi-physiological conditions (temperature of 37 degreesC and ionic strength 0.15 M NaCl) in order to determine the acidity constants from spectrophotometric studies, the pK(a) values found being pK(1) = 1.143 +/- 0.008 and pK(2) = 4.970 +/- 0.004. Subsequently, the spectrophotometrical speciation of the different complexes of Cu(II) with the drug was performed under the same conditions of temperature and ionic strength, observing the formation of Cu(Htenox)(2)(2+) with log beta(212) = 20.05 +/- 0.01, Cu(Htenox)(2) with log beta(012) = 13.6 +/- 0.1, Cu(Htenox)(2+) with log beta(111) = 10.52 +/- 0.08, as well as Cu(tenox)(+) with log beta(011) = 7.0 +/- 0.2, all of them in solution, and solid species Cu(tenox)(2)(s) with an estimated value of log beta(012)(s)approximate to18.7. The crystalline structure of the complex [Cu(tenox)(2)(py)(2)](EtOH)-Et-., was also determined, and it was observed that tenoxicam employs the oxygen of the amide group and the pyridyl nitrogen to bond to the cation. (C) 2003 Elsevier Science Inc. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Puebla MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0162-0134 UR - ISI:000183336400008 L2 - chemical speciation;crystal structure;tenoxicam;copper(II) complexes;COPPER(II) COMPLEXES; AQUEOUS-SOLUTION; MOLECULAR-STRUCTURE; ANTIINFLAMMATORY DINUCLEAR; METAL-COMPLEXES; PIROXICAM; PYRIDINE; LIGANDS; SPECTROPHOTOMETRY; INDOMETHACIN SO - Journal of Inorganic Biochemistry 2003 ;95(2-3):131-140 8912 UI - 8188 AU - Mueller KA AU - Sanchez GJZ AU - Sievert LL AD - Univ Massachusetts, Dept Anthropol, Amherst, MA 01003, USAUniv Massachusetts, Dept Publ Hlth, Amherst, MA, USAUniv Americas, Dept Psicol, Puebla, MexicoSievert, LL, Univ Massachusetts, Dept Anthropol, Machmer Hall, Amherst, MA 01003 USA TI - Sources of information and HRT prescribing practices among gynecologists in Puebla, Mexico AB - Objective: The purpose of this study was to determine the sources of information and hormone replacement therapy (HRT) prescribing practices of gynecologists in the capital city of Puebla, Mexico. Methods: Practicing gynecologists (n = 44) in 29 colonias (neighborhoods) in the city of Puebla completed a self-administered standardized questionnaire. Survey topics included primary sources of information about HRT, discussion of patient health practices, awareness of alternative medicines, and HRT prescribing practices. Results: Medical journals, hospital presentations, and textbook manuals were rated as the primary sources of information about HRT by 69-73% of physicians. Patients were rated as a primary source of information by 25% of physicians, and,pharmaceutical representatives by 16% of physicians. Almost all physicians reported a willingness to discuss diet, smoking habits and other health issues with their patients. Natural and herbal medications were recommended by 25% of physicians. Contrary to studies in the US, more male than female physicians reported recommending hormones to 90-100% of their menopausal patients (60 vs. 33%, n.s.). Conclusions: This study revealed that physicians utilize a wide range of information about HRT, including patients and pharmaceutical representatives. Physicians' willingness to list patients as a source of information about HRT indicates the degree to which patients are involved in the medicalization of menopause. Reasons given for prescribing HRT (e.g. prevention of osteoporosis) were similar to those identified in studies in the US and Canada. Some variation in physician attitudes and practices related to HRT was apparent within the city of Puebla, Mexico. (C) 2003 Elsevier Science Ireland Ltd. All rights reserved MH - USA MH - Mexico|Puebla PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 1 U4 - Geriatrics & Gerontology;Obstetrics & Gynecology U5 - J;Article AV - English IS - 0378-5122 UR - ISI:000183607200007 L2 - HRT;gynecologists;Mexico;HORMONE REPLACEMENT THERAPY; MEDICALIZATION; MENOPAUSE; ATTITUDES SO - Maturitas 2003 ;45(2):137-144 8913 UI - 6428 AU - Mugica F AU - Nebot A AD - Inst Latinoamer Comunicac Educ, Mexico City 14380, DF, Mexico. Univ Politecn Catalunya, Dept Llenguatges & Sistemes Informat, ES-08034 Barcelona, Spain TI - Simulated annealing for automated definition of fuzzy sets in human central nervous system modeling AB - The main goal of this research is to study the usefulness of the Simulated Annealing (SA) approach, developed in the context of the Fuzzy Inductive, Reasoning (FIR) methodology, for the automatic identification of fuzzy partitions in the human Central Nervous System (CNS) modeling problem. The SA algorithm can be viewed as a preprocess of the FIR methodology that allows the modeler to use it in a more efficient way. Two different SA algorithm cost functions have been studied and evaluated in this paper. The new approach is applied to obtain accurate models for the five controllers that compose the CNS. The results are compared and discussed with those obtained by other inductive methodologies for the same problem MH - Mexico|Distrito Federal MH - Spain T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlefmugica@ilce.edu.mx angela@lsi.upc.es0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY19C AV - English IS - 0302-9743 UR - ISI:000188097600067 SO - 2003 ;():545-553 8914 UI - 8324 AU - Muller A AU - Phaneuf RA AU - Aguilar A AU - Gharaibeh MF AU - Schlachter AS AU - Alvarez I AU - Cisneros C AU - Hinojosa G AU - McLaughlin BM AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyUniv Nevada, Dept Phys, Reno, NV 89557, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoQueens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North IrelandMuller, A, Univ Giessen, Inst Kernphys, Leihgesterner Weg 217, D-35392 Giessen, Germany TI - Photoionization of C2+ ions AB - We have investigated valence-shell photoionization (PI) of S-1 ground state and P-3(o) metastable states of C2+ ions. Absolute PI cross-sections were measured in the range 40.7-56.4 eV with an energy spread of 30 meV using a photon-ion merged beams arrangement at the Advanced Light Source (ALS). Detailed calculations based on the semi-relativistic Breit-Pauli R-matrix approach suggest a fraction of 40% of metastable ions in the primary beam of the experiment. Additional high resolution measurements have been carried out with an energy spread as low as 7.5 meV. The new data permit a sensitive test of theory with respect to the individual PI cross-section contributions originating from the different P-3(0.1.2) fine-structure components of the initial triplet states. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Morelos MH - United Kingdom MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000183211200058 L2 - photoionization;synchrotron radiation;photorecombination;time reversal;two-electron-one-photon transitions;RECOMBINATION SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2003 ;205():301-305 8915 UI - 7490 AU - Multamaki T AU - Gaztanaga E AU - Manera M AD - Univ Barcelona, Dept ECM, E-08028 Barcelona, SpainUniv Barcelona, CER Astrofis Fis Particules & Cosmol, E-08028 Barcelona, SpainCSIC, IEEC, ES-08034 Barcelona, SpainINAOE, Puebla 7200, MexicoMultamaki, T, Univ Barcelona, Dept ECM, Diagonal 647, E-08028 Barcelona, Spain TI - Large-scale structure in non-standard cosmologies AB - We study the growth of large-scale structure in two recently proposed non-standard cosmological models: the 'brane' induced gravity model of Dvali, Gabadadze and Porrati (DGP) and the 'Cardassian' models of Freese and Lewis. A general formalism for calculating the growth of fluctuations in models with a non-standard Friedman equation and a normal continuity equation of energy density is discussed. Both linear and non-linear growth are studied, together with their observational signatures on higher-order statistics and abundance of collapsed objects. In general, models that show similar cosmic acceleration at z similar or equal to 1 can produce quite different normalization for large-scale density fluctuations, i.e. sigma(8), cluster abundance or higher-order statistics, such as the normalized skewness S-3, which is independent of the linear normalization. For example, for a flat universe with Omega(M) similar or equal to 0.22, DGP and standard Cardassian cosmologies predict about two and three times more clusters respectively than the standard Lambda model at z = 1.5. When normalized to cosmic microwave background fluctuations, the sigma(8) amplitude turns out to be lower by a few tens of per cent. We also find that, for a limited redshift range, the linear growth rate can be faster in some models (e. g. modified polytropic Cardassian with q > 1) than in the Einstein-de Sitter universe. The value of the skewness S3 is found to have up to similar or equal to10 per cent variations (up or down) from model to model MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000185253400012 L2 - cosmological parameters;cosmology : theory;large-scale structure of Universe;CARDASSIAN EXPANSION; REDSHIFT DATA; CONSTRAINTS; SUPERNOVAE; UNIVERSE; CONSTANT; MATTER; MODEL; BRANE; FLAT SO - Monthly Notices of the Royal Astronomical Society 2003 ;344(3):761-775 8916 UI - 6369 AU - Munguia P AU - Guzman-Davalos L AU - Rodriguez O AD - Florida State Univ, Dept Biol Sci, Tallahassee, FL 32306, USAInst Biol Ecol & Conservac, Las Fuentes 45070, Zapopan, MexicoUniv Guadalajara, Dept Bot & Zool, Inst Bot, Zapopan 45101, MexicoMunguia, P, Florida State Univ, Dept Biol Sci, B-157, Tallahassee, FL 32306 USA TI - Macromycete phenological approximations in western Mexican forests AB - The seasonality of 10 of the most abundant species of macromycetes was studied at 3 sites in west-central Mexico. Collections over 20 years from the Instituto de Botanica of the Universidad de Guadalajara database were used for this study. Two of the sites were pine-oak forests: Mazamitla (70 collections) and Tapalpa (68 collections). The third consisted of an ecotone between subtropical cloud forest and pine-oak forest: Nevado de Colima (91 collections). The 3 sites are close to the tropical region and have a rainy season between late May and October. The development and abundance of fruit bodies were related to the climate and the vegetation of each site. Differences were found at 3 scales for both fructification time and abundance: between sites, between species, and within species at different sites MH - USA MH - Mexico|Jalisco PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000188387800018 SO - Southwestern Naturalist 2003 ;48(4):661-665 8917 UI - 7701 AU - Munoz-Alpizar R AU - Blanchet JP AU - Quintanar AI AD - Univ Quebec, Dept Earth & Atmospher Sci, Montreal, PQ H3C 3P8, CanadaInst Mexicano Petr, Mexico City 07730, DF, MexicoMunoz-Alpizar, R, Univ Quebec, Dept Earth & Atmospher Sci, Montreal, PQ H3C 3P8, Canada TI - Application of the NARCM model to high-resolution aerosol simulations: Case study of Mexico City basin during the Investigacion sobre Materia Particulada y Deterioro Atmosferico-Aerosol and Visibility Research measurements campaign AB - [1] The Northern Aerosol Regional Climate Model (NARCM) is used to study the visibility and three-dimensional (3-D) evolution of aerosol distributions within the Mexico City basin. NARCM simulates transport, diffusion, deposition, and size distributions of sulphur aerosol particles in the region. The model assumes only simple sulphur oxidation, not taking explicitly into account the urban air chemistry. Rather, it focuses on detailed aerosol microphysics and 3-D optical properties. The simulation performance is compared with upper air and ground-based observations for the following specific days of intensive measurement: 2, 4, and 14 March 1997. Time series at Mexico City airport shows lower values of visibility in the morning due to a shallow mixed layer and higher values in the afternoon following the evolution of the mixed layer depth. Modeled visibility shows large dependence on cardinal direction and size distribution of particles. It is found that better resolution of particle size leads to better representation of coagulation processes and to realistic size distributions which show a characteristic accumulation mode around 0.3 mum. As a result, visibility simulations are closer to those observed at the airport location. Comparing visibility is a stringent test for the model because it requires an accurate representation of 3-D meteorological fields together with a realistic aerosol simulation MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 0 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000184806100004 L2 - aerosols;visibility;transport;sulphate;GENERAL-CIRCULATION MODEL; REGIONAL CLIMATE MODEL; LAND-SURFACE SCHEME; SEA-SALT AEROSOLS; AIR-POLLUTION; SENSITIVITY; SIZE; ATMOSPHERE; EMISSIONS; PROJECT SO - Journal of Geophysical Research-Atmospheres 2003 ;108(D15): 8918 UI - 2989 AU - Munoz-Gomariz E AU - Munoz-Villanueva MC AU - Perez V AU - Casasola JC AU - Font P AU - Castro MC AU - Morote G AU - Miranda MD AU - Collantes E AD - Hosp Univ Reina Sofia, Res Unit, Cordoba, SpainGen Hosp, Mexico City, DF, Mexico TI - Amor spondyloarthropathy classification criteria as a diagnostic aid in rheumatological practice MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551401589 SO - Annals of the Rheumatic Diseases 2003 ;62():471-471 8919 UI - 6522 AU - Munoz-Rodriguez D AU - Villarreal S AU - Campos G AU - Vargas C AU - Rodriguez-Cruz JR AU - Donis G AD - ITESM, Ctr Elect & Telecommun, Monterrey 64849, NL, MexicoNortel Networks, Richardson, TX, USAMunoz-Rodriguez, D, ITESM, Ctr Elect & Telecommun, Suc Correos J, Monterrey 64849, NL, Mexico TI - End-to-end network delay model for heavy-tailed environments AB - Adequate quality of Internet Protocol (IP) services demand low transmission delays. However, packets traveling in a network are subject to a variety of delays that degrade severely the quality of service in real-time applications. This paper presents a general packet jitter-assessment methodology for a multi-node path in the presence of heavy-tailed traffic. Using the extreme-value theory, it is shown that delay performance is governed by a proposed networking-processing factor \T\(lambda) dependent on the traffic characteristics, the processing time along the path segments and the number of nodes in a route. \T\(lambda) allows the establishment of design constraints and the definition of a feasibility space for a routing algorithm in order to guarantee a quality of service (QoS). Copyright (C) 2003 AEI MH - Mexico|Nuevo Leon MH - USA PB - MILAN: ASSOC ELETTROTECNICA ED ELETTRONICA ITALIANA RP - NOT IN FILE U3 - TC 0 U4 - Telecommunications U5 - J;Article AV - English IS - 1120-3862 UR - ISI:000187962900001 L2 - SELF-SIMILARITY SO - European Transactions on Telecommunications 2003 ;14(5):391-398 8920 UI - 8244 AU - Munoz-Rodriguez JA AU - Asundi A AU - Rodriguez-Vera R AD - Nanyang Technol Univ, Sch Mech & Prod Engn, Singapore 639798, SingaporeCtr Invest Opt, Leon 37150, MexicoMunoz-Rodriguez, JA, Nanyang Technol Univ, Sch Mech & Prod Engn, Nanyang Ave, Singapore 639798, Singapore TI - Shape detection of moving objects based on a neural network of a light line AB - A simple, fast and accurate light line technique for direct detection of 3D shape of moving objects is presented. This technique is proved by simulation and experimentally verified. To obtain the surface shape, the object is moved along an axis with an electromechanical device and scanned by a light line. In this technique, the shape and height data of the object are determined by a radial basis function (RBF) neural network. This RBF neural network is built using the data of the light line projected onto the objects, whose dimensions are known. The data of the light line are extracted form the image by applying a Gaussian approximation. This approximation corresponds to the intensity model of a light line, whose intensity distribution is Gaussian. Also the architecture model of the RBF is Gaussian. With this technique, the 3D shape is obtained without parameters of the setup as is common in the other techniques which use a light line for shape detection of moving object. In this way the accuracy is improved, because errors of the parameter of setup are not introduced. To describe the accuracy a root mean square (rms) of error is calculated using data of this method and data of a contact method. A set of images are processed at very height speed to obtain the complete 3D shape. The time necessary for processing a light line by using this method is presented too. This line projection technique has a great potential because it is a very simple experimental setup and inexpensive. This technique is tested with objects with little details and its experimental results are presented. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Singapore PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000183463400010 L2 - 3D shape detection;light line projection;radial basis function neural network;Gaussian approximation;PROFILOMETRY SO - Optics Communications 2003 ;221(1-3):73-86 8921 UI - 7295 AU - Munoz-Saldana J AU - Balmori-Ramirez H AU - Jaramillo-Vigueras D AU - Iga T AU - Schneider GA AD - Tech Univ Hamburg, Adv Ceram Grp, D-21073 Hamburg, GermanyInst Politecn Nacl, ESIQIE, Dept Met Engn, Mexico City 07300, DF, MexicoNatl Ind Res Inst Nagoya, Ceram Sci Dept, Nagoya, Aichi 462, JapanMunoz-Saldana, J, Tech Univ Hamburg, Adv Ceram Grp, D-21073 Hamburg, Germany TI - Mechanical properties and low-temperature aging of tetragonal zirconia polycrystals processed by hot isostatic pressing AB - The influence of grain size and density of yttria-tetragonal zirconia polycrystals (Y-TZPs) ceramics on mechanical properties and on low-temperature aging degradation (LTD) in air and in hot water was investigated. A TZP powder containing 3 mol% Y2O3 was consolidated by slip casting and densified by the sintering/hot isostatic pressing (HIP) method. Only the presintered samples that contained less than 0.15% open porosity reached near full density after HIP. The best conditions to reach full density were found to be attained by presintering and HIP both at 1400 degreesC. At these conditions, some of the best mechanical properties such as modulus of rupture and Weibull modulus reached 1397 +/- 153 MPa and, 10.6, respectively. These values were clearly higher than those obtained from sintered bodies and samples hot isostatically pressed at 1600 degreesC. Aging degradation of 3Y-TZP materials can be avoided through microstructural design. Fully dense materials with a critical grain size <0.36 mum did not show any evidence of degradation after extreme aging conditions at pressurized autoclaving in hot water at 100, 200, and 260 degreesC for 8 h. We propose a criterion to predict degradation in air as well as in hot water for the characterized materials based on the microstructure and density control of the samples MH - Germany MH - Japan MH - Mexico|Distrito Federal PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000185821000021 L2 - Y-TZP CERAMICS; BRITTLE SOLIDS SO - Journal of Materials Research 2003 ;18(10):2415-2426 8922 UI - 9252 AU - Munoz-Valle JF AU - Vazquez-Del Mercado M AU - Garcia-Iglesias T AU - Orozco-Barocio G AU - Bernard-Medina G AU - Martinez-Bonilla G AU - Bastidas-Ramirez BE AU - Navarro AD AU - Bueno M AU - Martinez-Lopez E AU - Best-Aguilera CR AU - Kamachi M AU - rmendariz-Borunda J AD - OPD Antiguo Hosp Civil Guadalajara, Inst Biol Mol Med, Calle Hosp 278, Guadalajara 44280, Jalisco, MexicoUniv Guadalajara, CUCS, Inst Biol Mol Med & Terapia Genica, Guadalajara 44430, Jalisco, MexicoSSJ, Hosp Gen Occidente, Guadalajara, Jalisco, MexicoUniv Guadalajara, CUCS, Inst Enfermedades Cronico Degenerat, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, CUCS, Dept Fisiol, Guadalajara 44430, Jalisco, MexicoNagasaki Univ, Sch Med, Nagasaki 852, JapanVazquez-Del Mercado, M, OPD Antiguo Hosp Civil Guadalajara, Inst Biol Mol Med, Calle Hosp 278, POB 2-500, Guadalajara 44280, Jalisco, Mexico TI - T(H)1/T(H)2 cytokine profile, metalloprotease-9 activity and hormonal status in pregnant rheumatoid arthritis and systemic lupus erythematosus patients AB - During the course of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), several immune and neuroendocrine changes associated with pregnancy may exert positive (amelioration) or negative (exacerbation) effects on the clinical outcome. In order to shed light on the mechanisms underlying these responses, we performed a prospective longitudinal study in RA and SLE pregnant women, including healthy pregnant women as a control group. Cytokine messenger RNA (mRNA) expression assessed by quantitative competitive polymerase chain reaction (PCR) in peripheral blood mononuclear cells (PBMC), cytokine levels and lymphocyte proliferation responses (LPR) following phytohaemagglutinin (PHA) stimulation of PBMC, plasma metalloprotease-9 activity (MMP-9) and hormonal status during pregnancy were determined. TNFa was the most abundant cytokine mRNA expressed in PBMC in all groups studied (healthy pregnant women, RA and SLE pregnant patients). However, a general T-H 2 response reflected by high IL-10 levels was found in RA, as well as SLE, patients. A significant change in IFN-gamma was observed in RA patients but only during the first trimester of pregnancy. This compared with a major T-H 1 response in healthy pregnant women. Interestingly, our study showed a homogeneous hormonal pattern in RA and SLE patients. Although decreased cortisol levels were observed in all patients studied, this is possibly related to the remission of disease activity status brought about by steroid treatment before and during pregnancy. In summary, we suggest that complex immune and hormonal networks are involved in pregnancy and that rheumatic diseases are very dynamic immune processes that cannot be described with a clear-cut cytokine profile. Furthermore, the observations in this study may reflect treatment-related immune effects more than those associated with disease MH - Japan MH - Mexico|Jalisco PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Immunology U5 - J;Article AV - English IS - 0009-9104 UR - ISI:000180754400026 L2 - cytokines;metalloprotease;rheumatic diseases;pregnancy T(H)1/T(H)2;RECURRENT SPONTANEOUS-ABORTION; MESSENGER-RNA EXPRESSION; INTERFERON-GAMMA; GELATINASE-B; WOMEN; CELLS; TROPHOBLAST; VALIDATION; GESTATION; NEPHRITIS SO - Clinical and Experimental Immunology 2003 ;131(2):377-384 8923 UI - 8006 AU - Munoz A AU - Nakazaki M AU - Goodman JC AU - Barrios R AU - Onetti CG AU - Bryan J AU - guilar-Bryan L AD - Baylor Coll Med, Dept Mol & Cellular Biol, Houston, TX 77030, USABaylor Coll Med, Dept Med, Houston, TX 77030, USABaylor Coll Med, Dept Neurosurg, Houston, TX 77030, USABaylor Coll Med, Dept Pathol, Houston, TX 77030, USAKagoshima Univ, Dept Internal Med 1, Fac Med, Kagoshima 890, JapanUniv Colima, Ctr Invest Biomed, Colima, MexicoBryan, J, Baylor Coll Med, Dept Mol & Cellular Biol, Houston, TX 77030 USA TI - Ischemic preconditioning in the hippocampus of a knockout mouse lacking SUR1-based K-ATP channels AB - Background and Purpose-ATP-sensitive K+ (K-ATP) channels have been implicated in the mechanism of neuronal ischemic preconditioning. To evaluate the role of neuronal/beta-cell-type K-ATP channels, SUR1 null (Sur1KO) mice lacking (K(IR)6.x/SUR1)(4) K-ATP channels were subjected to a preconditioning protocol with the use of double carotid occlusion. Methods-Wild-type C57BU6 and Sur1KO mice were subjected to a double carotid block for 40 minutes with or without a 20-minute preconditioning block. After a 10-day reperfusion period, damage was assessed histologically in the hippocampal CA1, CA2, and CA3 areas and in the dentate gyrus. The neuroprotective effects of intracerebroventricular injections of diazoxide, which selectively affects mitochondria versus opening SUR1-type K-ATP channels, and 5-hydroxydecanoate, a selective blocker of mitoK(ATP) channels, were evaluated with the same protocol. Results-Neurons in the CA1 region of both Sur1KO and wild-type animals subjected to a 20-minute ischemic insult were protected equally from neuronal damage produced by a subsequent 40-minute ischemic period. Pretreatment with diazoxide protected both Sur1KO and wild-type neurons, while 5-hydroxydecanoate augmented neurodegeneration in both strains of animals when administered before a 20-minute bout of ischemia. Conclusions-SUR1-based K-ATP channels are not obligatory for neuronal preconditioning or augmentation of neurodegeneration by 5-hydroxydecanoate MH - Japan MH - Mexico|Colima MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 18 U4 - Clinical Neurology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0039-2499 UR - ISI:000180251100042 L2 - cerebral ischemia;decanoic acids;diazoxide;hippocarnpus;ischemic preconditioning;potassium channels;sulfonylurea receptors;mice;SENSITIVE POTASSIUM CHANNELS; GLIBENCLAMIDE BINDING-SITES; RAT HIPPOCAMPUS; MITOCHONDRIAL; NEURONS; OPENERS; BRAIN; NEUROPROTECTION; LOCALIZATION; ADENOSINE SO - Stroke 2003 ;34(1):164-170 8924 UI - 7942 AU - Munoz JAT AU - Malabre M AD - IRCCyN, Inst Rech Commun & Cybernet Nantes, CNRS, UMR 6597, F-44321 Nantes 03, FranceIPN, CINVESTAV, Dept Automat Control, Mexico City 07300, DF, MexicoMalabre, M, IRCCyN, Inst Rech Commun & Cybernet Nantes, CNRS, UMR 6597, BP 92101, F-44321 Nantes 03, France TI - Simultaneous model matching and disturbance rejection with stability by state feedback AB - This work deals with the Model Matching Problem and the Disturbance Rejection Problem with stability by state feedback. Each one of these control problems has, separately, received a lot of contributions, but, to our best knowledge, we propose here for the first time a complete structural solution for square (same number of control inputs and outputs) strictly proper systems. Our structural conditions nicely enhance the role played by the zeros, both finite and infinite. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000184188700012 L2 - linear systems;model matching;disturbance rejection;polynomial matrices;finite and infinite zeros;stability;SYSTEMS; DESIGN SO - Automatica 2003 ;39(8):1445-1450 8925 UI - 6516 AU - Munoz MA AU - Gonzalez VM AU - Rodriguez M AU - Favela J AD - CICESE, Dept Ciencias Computac, Ensenada, Baja California, MexicoUniv Calif Irvine, Irvine, CA, USAUABC, Fac Ingn, Mexicali, Baja California, MexicoMunoz, MA, CICESE, Dept Ciencias Computac, Ensenada, Baja California, Mexico TI - Supporting context-aware collaboration in a hospital: An ethnographic informed design AB - This paper reports the development of a context-aware messaging system to support the intensive and distributed nature which characterizes information management and collaboration in a hospital setting. Our design was based on a set of findings gathered during a workplace study conducted in a hospital. We identified that collaboration in the hospital is highly based on a set of contextual elements: (1) the location of people and devices, (2) the timing of messages to be delivered, (3) the role-oriented nature of the work and (4) the artifact-mediate nature of information gathering. Those elements were validated and their support analyzed with hospital's staff through a session where scenarios of use where created, refined, and evaluated. The results of this study allowed us to inform the design process of a context-aware architecture to support collaboration in a hospital setting. The architecture allows for the implementation of applications that respond in accordance to the context surrounding the activities performed at the hospital, thus enhancing information exchange, collaboration, and ultimately, decision making. In particular, we focus our attention on a context-aware messaging system developed on top of this architecture, and which allows health care workers to exchange messages that depend, for their delivery, on the status of people, resources and/or devices MH - Mexico|Baja California MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000188006200028 SO - Groupware: Design, Implementation, and Use 2003 ;2806():330-344 8926 UI - 7607 AU - Munoz MA AU - Rodriguez M AU - Favela J AU - Martinez-Garcia AI AU - Gonzalez VM AD - Ctr Sci Res & Higher Educ Ensenada, CICESE, Ensenada, Baja California, MexicoUniv Calif Irvine, Irvine, CA 92717, USAMunoz, MA, Ctr Sci Res & Higher Educ Ensenada, CICESE, Ensenada, Baja California, Mexico TI - Context-aware mobile communication in hospitals AB - Information management in a hospital setting requires significant collaboration, mobility, and data integration. Patient care, a task often complicated by time-critical urgency, can involve many devices and a variety of staff. So far, no system has addressed these unique requirements. The authors designed a context-aware mobile system that empowers mobile devices to recognize the context in which hospital workers perform their tasks, accounts for contextual elements, and lets users send messages and access hospital services as needed MH - Mexico|Baja California MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Hardware & Architecture;Computer Science, Software Engineering U5 - J;Article AV - English IS - 0018-9162 UR - ISI:000185029100011 SO - Computer 2003 ;36(9):38-+ 8927 UI - 8391 AU - Munoz S AU - Hernandez-Pando R AU - Abraham SN AU - Enciso JA AD - Inst Mexicano Seguro Social, Ctr Med Nacl Siglo XXI, Unidad Invest Med Enfermedades Infecciosas & Para, Hosp Pediat, Mexico City 06725, DF, MexicoInst Politecn Nacl, Escuela Nacl Cienicas Biol, Dept Inmunol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Patol, Mexico City, DF, MexicoDuke Univ, Dept Pathol, Durham, NC 27710, USADuke Univ, Dept Mol Genet & Microbiol, Durham, NC 27710, USAEnciso, JA, Inst Mexicano Seguro Social, Ctr Med Nacl Siglo XXI, Unidad Invest Med Enfermedades Infecciosas & Para, Hosp Pediat, Ave Cuauhtemoc 330,Colonia Doctores, Mexico City 06725, DF, Mexico TI - Mast cell activation by Mycobacterium tuberculosis: Mediator release and role of CD48 AB - Mast cells (MC) are abundant in the lung and other peripheral tissue, where they participate in inflammatory processes against bacterial infections. Like other effector cells of the innate immune system, MC interact directly with a wide variety of infectious agents. This interaction results in MC activation and inflammatory mediator release. We demonstrated that MC interact with Mycobacterium tuberculosis, triggering the release of several prestored reagents, such as histamine and beta-hexosaminidase, and de novo synthesized cytokines, such as TNF-alpha and IL-6. A number of M. tuberculosis Ags, ESAT-6, MTSA-10, and MPT-63, have been implicated in MC activation and mediator release. A MC plasmalemmal protein, CD48, was implicated in interactions with mycobacteria because CD48 appeared to aggregate in the MC membrane at sites of bacterial binding and because Abs to CD48 inhibited the MC histamine response to mycobacteria. Cumulatively, these findings suggest that MC, even in the absence of opsonins, can directly recognize M. tuberculosis and its Ags and have the potential to play an active role in mediating the host's innate response to M. tuberculosis infection MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 12 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000183055000033 L2 - NECROSIS-FACTOR-ALPHA; PULMONARY TUBERCULOSIS; TNF-ALPHA; INFECTION; RESPONSES; LUNG; MACROPHAGES; CHOLESTEROL; EXPRESSION; RECEPTORS SO - Journal of Immunology 2003 ;170(11):5590-5596 8928 UI - 8623 AU - Muraille E AU - De Trez C AU - Pajak B AU - Torrentera FA AU - De Baetselier P AU - Leo O AU - Carlier Y AD - Free Univ Brussels, Inst Biol & Med Mol, Physiol Anim Lab, Gosselies, BelgiumFree Univ Brussels VIB, Dept Immunol Parasitol & Ultrastruct, B-1640 Rhode St Genese, BelgiumInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Inmunol, Mexico City, DF, MexicoFree Univ Brussels, Parasitol Lab, Erasme, BelgiumCarlier, Y, Free Univ Brussels, Fac Med, Parasitol Lab, 808 Route Lennik,CP616, B-1070 Brussels, Belgium TI - Amastigote load and cell surface phenotype of infected cells from lesions and lymph nodes of susceptible and resistant mice infected with Leishmania major AB - Cells of the dendritic cell (DC) lineage, by their unique ability to stimulate naive T cells, may be of crucial importance in the development of protective immune responses to Leishmania parasites. The aim of this study was to compare the impact of L. major infection on DCs in BALB/c (susceptible, developing Th2 responses), C57BL/6 (resistant, developing Th1 responses), and tumor necrosis factor (TNF)(-/-) C57BL/6 mice (susceptible, developing delayed and reduced Th1 responses). We analyzed by immunohistochemistry the phenotype of infected cells in vivo. Granulocytes (GR1(+)) and macrophages (CD11b(+)) appear as the mainly infected cells in primary lesions. In contrast, cells expressing CD11c, a DC specific marker, are the most frequently infected cells in draining lymph nodes of all mice tested. These infected CD11c(+) cells harbored a particular morphology and cell surface phenotype in infected C57BL/6 and BALB/c mice. CD11c(+) infected cells from C57BL/6 and TNF-/- C57BL/6 mice displayed a weak parasitic load and a dendritic morphology and frequently expressed CD11b or F4/80 myeloid differentiation markers. In contrast, some CD11c(+) infected cells from BALB/c mice were multinucleated giant cells. Giant cells presented a dramatic accumulation of parasites and differentiation markers were not detectable at their surface. In all mice, lymph node CD11c(+) infected cells expressed a low major histocompatibility complex II level and no detectable CD86 expression. Our results suggest that infected CD11c(+) DC-like cells might constitute a reservoir of parasites in lymph nodes MH - Belgium MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000182501500048 L2 - EPIDERMAL LANGERHANS-CELLS; NITRIC-OXIDE SYNTHASE; CLASS-II MOLECULES; DENDRITIC CELLS; IN-VIVO; T-CELLS; CUTANEOUS LEISHMANIASIS; FLT3 LIGAND; BALB/C MICE; ANTIGEN SO - Infection and Immunity 2003 ;71(5):2704-2715 8929 UI - 7820 AU - Muriel P AU - Castaneda G AU - Ortega M AU - Noel F AD - CINVESTAV, IPN, Pharmacol Sect, Secc Externa Farmacol, Mexico City 07000, DF, MexicoFed Univ Rio De Janeiro, Inst Ciencias Biomed, Dept Farmacol Basica & Clin, BR-21941590 Rio De Janeiro, BrazilMuriel, P, CINVESTAV, IPN, Pharmacol Sect, Secc Externa Farmacol, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Insights into the mechanism of erythrocyte Na+/K+-ATPase inhibition by nitric oxide and peroxynitrite anion AB - Evidence shows that Na+/K+-ATPase from kidney, brain and liver is inhibited by nitric oxide (NO) and peroxynitrite anion (ONO2-), but the mechanism is unknown. The aim of the present work was to study the inhibitory effect of NO and ONO2- on erythrocyte Na+/K+-ATPase. Erythrocyte membranes were isolated from male Wistar rats by hypotonic washing. The membranes (free from haemoglobin) were incubated for Na+/K+-ATPase activity measurement at various concentrations of ATP in the presence or absence of 400 muM SNAP (an NO donor) or 100 muM SIN-1 (an ONO2- donor). At these concentrations, SNAP and SIN-1 released about the same amount (100 muM) of NO or ONO2- respectively, as monitored by measuring NO2- + NO3-. Both SNAP and SIN-1 decreased V-max by ca. 75% but they did not decrease the apparent affinity of the Na+/K+-ATPase for the substrate (a decrease of K. was even observed after SNAP treatment). The pattern of this inhibition is compatible either with oxidation of SH groups directly involved in ATP binding but in a way that is not surmountable by increasing the substrate concentration ('non-competitive') or with oxidation of SH groups located outside the active site of the enzyme but important for the activity of the enzyme. Copyright (C) 2003 John Wiley Sons, Ltd MH - Brazil MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Toxicology U5 - J;Article AV - English IS - 0260-437X UR - ISI:000184483700012 L2 - nitric oxides Na+/K+-ATPase;SIN-1;SNAP;erythrocyte membranes;ADENOSINE-TRIPHOSPHATASE; (NA; SUPEROXIDE; FLUIDITY; BINDING; LIVER; SITES; CELLS SO - Journal of Applied Toxicology 2003 ;23(4):275-278 8930 UI - 7006 AU - Murillo-Muneton G AU - Dorobek SL AD - Inst Mexicano Petr, Direcc Ejecutiva Explorac & Producc, Mexico City 07730, DF, MexicoTexas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843, USAMurillo-Muneton, G, Inst Mexicano Petr, Direcc Ejecutiva Explorac & Producc, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Controls on the evolution of carbonate mud mounds in the Lower Cretaceous Cupido Formation, northeastern Mexico AB - The Lower Cretaceous Cupido Formation in northeastern Mexico represents part of an extensive post-rift carbonate platform system that stretched across much of the Gulf of Mexico passive margin. Numerous sponge-microbial mud mounds are found within the lower part of the Cupido Formation; four mound types were identified at Bustamante Canyon and other localities in the State of Nuevo Leon, Mexico. Type 1 siliceous sponge-microbial mounds contain boundstone core facies, are the oldest mounds, and are associated with adjacent deep-ramp to basinal lime mudstone facies. Type 2 sponge-microbial mounds also have boundstone core facies, are associated with outer-ramp wackestone-packstone facies, and overlie strata that contain Type 1 mounds. Type 3 sponge-microbial-coral mounds contain only 40-50% boundstone core facies and overlie or are locally interstratified with Type 2 mound-bearing strata, although Type 3 mounds are associated with outer-ramp packstone facies. Type 4 calcisponge-microbial-coral biodetrital (dominantly skeletal packstone) mounds are the youngest mounds and are associated with outer-ramp packstone and ramp-crest rudist packstone facies. Both the length and height (i.e., synoptic relief) of individual Types 1, 2, and 3 mounds range from a few meters to tens of meters. Only Type 4 mounds reach several hundred meters in length and are up to 90 m thick, although synoptic relief on Type 4 mounds was minor. Systematic changes in the biota, morphologies, dimensions, abundance, stratigraphic distribution, and facies associations of the lower Cupido mounds were largely controlled by the initial ramp-like depositional profile of the lower Cupido platform and the long-term ("second-order") accommodation trends that affected ramp evolution during Early Cretaceous time. The ramp-like profile was not conducive to transport of large volumes of allochthonous sediment from updip source areas to mound locations on the outer ramp. This allowed slowly accumulating Types 1, 2, and 3 mounds to build synoptic relief because adjacent outer-ramp facies accumulated at even slower rates. In contrast, Type 4 mound cores contain abundant coarse-grained skeletal sediment and also developed the least synoptic relief of all lower Cupido mounds because of higher accumulation rates associated with adjacent grain-rich ramp-crest lithofacies. We suggest that these systematic changes in mound attributes largely reflect long-term (second-order) accommodation loss and regional progradation of the lower Cupido ramp during Early Cretaceous time. Accordingly, the upward transition from Type 1 to Types 2 and 3 mounds, and ultimately to Type 4 buildups, can be explained by the progressive shallowing of outer-ramp environments as more updip facies tracts prograded eastward from late Hauterivian to early Aptian time. There are few stratigraphic successions in the rock record that provide better evidence for the links between large-scale stratigraphic relationships and mound evolution along low-gradient carbonate ramps MH - Mexico|Distrito Federal MH - USA PB - TULSA: SEPM-SOC SEDIMENTARY GEOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Geology U5 - J;Article AV - English IS - 1527-1404 UR - ISI:000186375400003 L2 - MISSISSIPPIAN WAULSORTIAN MOUNDS; CORAL-REEF SPONGES; MICROBIAL ASSOCIATIONS; SACRAMENTO MOUNTAINS; POPULATIONS; PLATFORMS; FRAMEWORK; RECORD; GROWTH SO - Journal of Sedimentary Research 2003 ;73(6):869-886 8931 UI - 8400 AU - Murillo JI AU - Encarnacion-Dimayuga R AU - Malmstrom J AU - Christophersen C AU - Franzblau SG AD - Univ Autonoma Baja California, Dept Agron, La Paz 23080, MexicoUniv Copenhagen, HC Orsted Inst, Marine Chem Sect, DK-2100 Copenhagen, DenmarkGillis W Long Hansens Dis Ctr, Pharmacol Res Dept, Lab Res Branch, Baton Rouge, LA 70894, USAEncarnacion-Dimayuga, R, Univ Autonoma Baja California, Dept Agron, AP 19-B, La Paz 23080, Mexico TI - Antimycobacterial flavones from Haplopappus sonorensis AB - Crude extracts of Haplopappus sonorensis (A. Gray) S.F. Blake (Asteraceae), showed activity against Mycobacterium tuberculosis H(37)Rv. By assay-guided fractionation, 5-hydroxy-3,7,4'-trimethoxyflavone (1), 5,7-dihydroxy-3,4'-dimethoxyflavone (2) and 5,4-dihydroxy-3,7-dimethoxyflavone (3) were identified as the antimycobacterial principles. Compound 2 was the most active compound. (C) 2003 Elsevier Science B.V. All rights reserved MH - Denmark MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0367-326X UR - ISI:000182946900002 L2 - Haplopappus sonorensis;antimycobacterial;ermanin;kumatakenin;5-hydroxy-3,7,4 '-trimethoxyflavone;CALIFORNIA-SUR MEXICO; MEDICINAL-PLANTS SO - Fitoterapia 2003 ;74(3):226-230 8932 UI - 8483 AU - Murphy JB AU - Keppie JD AD - St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoMurphy, JB, St Francis Xavier Univ, Dept Earth Sci, POB 5000, Antigonish, NS B2G 2W5, Canada TI - Collisional orogenesis in the geological record and modern analogues MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Editorial Material AV - English IS - 0040-1951 UR - ISI:000182642100001 L2 - TECTONICS; BIRTH; EARTH SO - Tectonophysics 2003 ;365(1-4):1-5 8933 UI - 8484 AU - Murphy JB AU - Hynes AJ AU - Johnston ST AU - Keppie JD AD - St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaMcGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 2A7, CanadaUniv Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 3P6, CanadaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoMurphy, JB, St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, Canada TI - Reconstructing the ancestral Yellowstone plume from accreted seamounts and its relationship to flat-slab subduction AB - Recent geodynamic analyses have emphasized the relationship between modem flat-slab subduction zones and the overriding of buoyant oceanic crust. Although most models for the evolution of the Late Mesozoic-Cenozoic Laramide orogeny in the southwestern United States involve flat-slab subduction, the mechanisms proposed are controversial. An examination of the geological evolution of the 60-50-Ma Crescent terrane of the Coast Ranges indicates that it was formed in a shallowing-upward Loihi-type oceanic setting culminating in the eruption of subaerial lavas. Plate reconstructions indicate that the Crescent terrane was emplaced into ca. 20-Ma crust, and the presence of subaerial lavas implies an uplift due to the plume of ca. 4.2 km, which we use to calculate a minimum buoyancy flux of 1.1 Mg s(-1), similar to that of the modem Yellowstone plume. Published paleomagnetic data indicate that the Crescent terrane was formed at a paleolatitude similar to that of the Yellowstone plume. The Crescent seamount was accreted within 5 My of the cessation of plume magmatism. Plate reconstructions indicate that it would have originated about 750 kin to the west of the North American plate margin if it developed above a fixed Yellowstone plume, and are therefore consistent with the recorded very short interval between its formation and tectonic emplacement. We interpret the Crescent terrane as due to the ancestral Yellowstone plume. Such a plume would have generated an elongate swell and related plateau that would have been overridden by the North American margin. Taken together, the relationship between flat-slab and overriding of oceanic plateau in Laramide times would have been analogous to the relationship between modem Andean flat-slab subduction zones and the Juan Fernandez and Nazca oceanic plateaus. (C) 2003 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000182642100010 L2 - flat-slab subduction;Coast Ranges;Crescent terrane;Yellowstone plume;WESTERN UNITED-STATES; TECTONIC EVOLUTION; VANCOUVER-ISLAND; LARAMIDE OROGENY; CENTRAL ANDES; COAST RANGE; WASHINGTON; MARGIN; CONSTRAINTS; BASALTS SO - Tectonophysics 2003 ;365(1-4):185-194 8934 UI - 7424 AU - Murrell JR AU - Faber K AU - Alonso ME AU - Rasmussen A AU - Varpetian A AU - Macias MA AU - Cochran E AU - Gambetii P AU - Castellani RJ AU - Bauserman SC AU - Foroud T AU - Vidal R AU - Miravalle L AU - Ghetti B AU - Ringman JM AD - Indiana Univ, Sch Med, Indianapolis, IN 46204, USAInst Nacl Neurol & Neurocirug, Mexico City, IN, MexicoUC Irvine, Orange, CA, USAUniv Guadalajara, Mexico City, DF, MexicoRush Presbyterian St Lukes Med Ctr, Chicago, IL 60612, USACase Western Reserve Univ, Cleveland, OH 44106, USAMichigan State Univ, E Lansing, MI 48824, USAAustin Pathol Associates, Austin, TX, USA TI - The A431E Presenilin 1 gene mutation associated with familial Alzheimer disease in individuals of Mexican descent: Evidence for a founder effect MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER ASSN NEUROPATHOLOGISTS INC RP - NOT IN FILE U3 - TC 5 U4 - Clinical Neurology;Neurosciences;Pathology U5 - J;Meeting Abstract AV - English IS - 0022-3069 UR - ISI:000182959100032 SO - Journal of Neuropathology and Experimental Neurology 2003 ;62(5):543-543 8935 UI - 7052 AU - Muzerolle J AU - Calvet N AU - Hartmann L AU - D'Alessio P AD - Univ Arizona, Steward Observ, Tucson, AZ 85721, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoMuzerolle, J, Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA TI - Unveiling the inner disk structure of T Tauri stars AB - We present near-infrared spectra of the excess continuum emission from the innermost regions of classical T Tauri disks. In almost all cases, the shape of the excess is consistent with that of a single-temperature blackbody with Tsimilar to1400 K, similar to the expected dust sublimation temperature for typical dust compositions. The amount of excess flux roughly correlates with the accretion luminosity in objects with similar stellar properties. We compare our observations with the predictions of simple disk models having an inner rim located at the dust sublimation radius, including irradiation heating of the dust from both the stellar and accretion luminosities. The models yield inner rim radii in the range 0.07-0.54 AU, increasing with higher stellar and accretion luminosities. Using typical parameters that fit our observed sample, we predict a rim radius similar to0.2 AU for the T Tauri star DG Tau, which agrees with recent Keck near-infrared interferometric measurements. For large mass accretion rates, the inner rim lies beyond the corotation radius at (or within) which magnetospheric accretion flows are launched, which implies that pure gaseous disks must extend inside the dust rim. Thus, for a significant fraction of young stars, dust cannot exist in the innermost disk, calling into question theories in which solid particles are ejected by a wind originating at the magnetospheric radius MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 64 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186433200016 L2 - accretion, accretion disks;infrared : stars;stars : formation;stars : pre-main-sequence;techniques : spectroscopic;HERBIG AE/BE STARS; YOUNG STELLAR OBJECTS; SPECTRAL ENERGY-DISTRIBUTIONS; ACCRETION DISKS; MAGNETOSPHERIC ACCRETION; CIRCUMSTELLAR DISKS; EMISSION; MODEL; CONSTRAINTS; IRRADIATION SO - Astrophysical Journal 2003 ;597(2):L149-L152 8936 UI - 9351 AU - Nachtigall I AU - Gebbeken N AU - Urrutia-Galicia JL AD - Univ Fed Armed Forces, Inst Engn Mech & Struct Mech, D-85577 Munich, GermanyNatl Autonomous Univ Mexico, Engn Inst, Dept Appl Mech, Mexico City, DF, MexicoGebbeken, N, Univ Fed Armed Forces, Inst Engn Mech & Struct Mech, D-85577 Munich, Germany TI - On the analysis of vertical circular cylindrical tanks under earthquake excitation at its base AB - Based on two international well accepted design standards, Eurocode 8 Part 4-Tanks, Silos and Pipelines and API Standard 650-Seismic Design of Storage Tanks, the structural response of seismically excited vertical circular cylindrical tanks is analysed from a novel perspective. The common basic assumption, adopted from Haroun-Housner and Veletsos, that a circular cylindrical tank containing liquid behaves like a cantilever beam without deformation of its cross-section is obsolete. Instead the authors consider the shell modal forms in order to generate a refined model. Emphasis is laid on the analysis of the fundamental frequencies for the tank-liquid-system. They are calculated by a new method, based on Galerkin's approximations for cylindrical shells. As the results differ significantly from those calculated by the proposed formulae in both EC8 and API Standard 650, the new results are compared with tank failures during recent earthquakes. This comparison is astonishing. It can be seen from recent examples of tank damage that most failures are caused by resonance effects, which are taken into account neither in EC8 nor in API Standard 650. And, therefore, we take into account a high safety risk. This leads to the conclusion that the basic assumptions for current design provisions are no longer tenable under the present knowledge of shell theory and shell design, and, therefore should be reconsidered. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Civil U5 - J;Article AV - English IS - 0141-0296 UR - ISI:000180504400008 L2 - vertical circular cylindrical tanks;seismic response;frequency analysis;Eurocode 8-Part 4;API standard 650;shell modal forms;tank-liquid system;load-structure-interaction SO - Engineering Structures 2003 ;25(2):201-213 8937 UI - 4495 AU - Naeher LP AU - Rubin CS AU - Hernandez-Avila M AU - Noonan GP AU - Paschal D AU - Narciso J AU - Lain RE AU - Gastanaga C AU - Almeyda R AU - Jarrett J AU - Caldwell KL AU - McGeehin M AD - Ctr Dis Control & Prevent, Natl Ctr Environm Hlth, Div Environm Hazards & Hlth Effects, Atlanta, GA 30341, USAUS Agcy Int Dev, Peru Mission, Environm Strateg Object Team, Lima, PeruNatl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca, Morelos, MexicoCtr Dis Control & Prevent, Natl Ctr Environm Hlth, Div Sci Lab, Atlanta, GA 30341, USAMinist Hlth, Direcc Gen Saud Ambiental, DIGESA, Lima, PeruNaeher, LP, Univ Georgia, Dept Environm Hlth Sci, EHS Bldg, Athens, GA 30602 USA TI - Use of isotope ratios to identify sources contributing to pediatric lead poisoning in Peru AB - In 1998, a school-based blood lead level (BLL) survey of 2,510 children, conducted in Lima and Callao, Peru, revealed elevated BLLs in children from 2 Callao schools (mean BLL = 25.6 mug/dl; n = 314) and in children from Callao overall (mean BLL = 15.2 mug/dl; n = 898), compared with children from Lima (mean BLL = 7.1 mug/dl; n = 1,612). Public health officials at Peru's Direccion General de Salud Ambiental (DIGESA) hypothesized that a possible source of the elevated pediatric BLLs observed in Callao was a large depository near the port where mineral concentrates are stored prior to shipment. The U.S. Centers for Disease Control and Prevention worked with DIGESA to identify source(s) that contributed to the pediatric lead poisonings by comparing isotopic profiles of lead in blood, mineral, gasoline, and air filter samples. The lead isotope ratio (IR) observed in mineral samples from the depository in Callao differed from those in gasoline samples from Lima and Callao. The blood lead IRs of children living near the depository were similar to the IRs of the mineral samples and different from the IRs of the gasoline samples, suggesting that lead from the depository-and not gasoline-was the primary source of lead in these children. Lead IR analysis of regional air filter samples supported these findings MH - USA MH - Mexico|Morelos MH - Peru PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000223689800006 L2 - children;environmental sampling;isotope ratios;lead;Peru;MINING COMMUNITY; IDENTIFICATION; BLOOD; CHILDREN; GASOLINE; EXPOSURE SO - Archives of Environmental Health 2003 ;58(9):579-589 8938 UI - 6843 AU - Nakada SY AU - Ono Y AU - Herrell SD AU - Gutierrez-Aceves J AU - Das S AU - Averch TD AU - Nakada SY AD - Univ Wisconsin, Sch Med, Dept Surg, Div Urol, Madison, WI 53792, USAVanderbilt Univ, Med Ctr, Nashville, TN, USAUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoUniv Calif Davis, Sch Med, Sacramento, CA 95817, USAUniv Pittsburgh, Med Ctr, Pittsburgh, PA, USANakada, SY, Univ Wisconsin, Sch Med, Dept Surg, Div Urol, G5-339 Clin Sci Ctr,600 Highland Ave, Madison, WI 53792 USA TI - Controversial cases in endourology MH - Mexico|Jalisco MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0892-7790 UR - ISI:000186784400009 L2 - STRICTURES SO - Journal of Endourology 2003 ;17(9):737-740 8939 UI - 8419 AU - Nakagawa T AU - Kang DH AU - Ohashi R AU - Suga S AU - Herrera-Acosta J AU - Rodriguez-Iturbe B AU - Johnson RJ AD - Baylor Coll Med, Div Nephrol, Houston, TX 77030, USAEwha Womans Coll Med, Ewha Med Res Ctr, Div Nephrol, Seoul, South KoreaNatl Cardiovasc Ctr, Res Inst, Div Hypertens, Osaka, JapanInst Nacl Cardiol I Chavez, Dept Nephrol, Mexico City 14080, DF, MexicoUniv Hosp, Renal Serv & Lab, Maracaibo, VenezuelaFUNDACITE Zulia, Inst Invest Biomed, Maracaibo, VenezuelaNakagawa, T, Baylor Coll Med, Div Nephrol, 1 Baylor Plaza,ALKEK N520, Houston, TX 77030 USA TI - Tubulointerstitial disease: role of ischemia and microvascular disease AB - Purpose of review Tubulointerstitial injury is characteristic of aging-associated renal injury and progressive renal disease. Salt-sensitive hypertension is also associated with tubulointerstitial inflammation, especially when accompanied by microvascular disease. Here we summarize recent studies on the pathogenesis and consequences of tubulointerstitial disease, emphasizing the role of ischemia and the microvasculature. Recent findings Tubulointerstitial injury occurs via several mechanisms of which one of the most important is chronic ischemia. Recent studies suggest that chronic vasoconstriction may contribute to the renal injury associated with angiotensin II, catecholamines, nitric oxide inhibition, hypokalemia, hyperuricemia, and cyclosporine nephropathy. Salt-sensitivity may result as a consequence of the tubulointerstitial inflammatory response to these conditions, and this appears to be perpetuated by the development of preglomerular vascular disease. With progression of tubulointerstitial disease there is also a loss of peritubular capillaries, and stimulating microvascular growth with angiogenic factors can stabilize renal function in these models. Summary Ischemia secondary to vasoconstriction or to structural changes of the renal vasculature may have important consequences both in terms of mediating salt-sensitive hypertension and renal progression. Angiogenic factors may have potential benefit in preventing or treating these conditions MH - Japan MH - Mexico|Distrito Federal MH - South Korea MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 18 U4 - Urology & Nephrology;Peripheral Vascular Disease U5 - J;Review AV - English IS - 1062-4821 UR - ISI:000182954800003 L2 - inflammation;angiogenesis;salt-sensitive;ENDOTHELIAL GROWTH-FACTOR; SALT-SENSITIVE HYPERTENSION; REMNANT KIDNEY MODEL; MONOCYTE CHEMOATTRACTANT PROTEIN-1; TUBULAR EPITHELIAL-CELLS; EXPERIMENTAL THROMBOTIC MICROANGIOPATHY; ANGIOTENSIN-II EXPOSURE; NITRIC-OXIDE SYNTHESIS; CHRONIC-RENAL-FAILURE; NF-KAPPA-B SO - Current Opinion in Nephrology and Hypertension 2003 ;12(3):233-241 8940 UI - 9887 AU - Nakagawa T AU - Mazzali M AU - Kang DH AU - Kanellis J AU - Watanabe S AU - Sanchez-Lozada LG AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AU - Johnson RJ AD - Baylor Coll Med, Dept Med Nephrol, Houston, TX 77030, USAInst Nacl Cardiol 1, Mexico City, DF, MexicoUniv Hosp, Maracaibo, VenezuelaUniv Zulia, Maracaibo 4011, VenezuelaNakagawa, T, Baylor Coll Med, Dept Med Nephrol, 1 Baylor Plaza,ALKEK N520, Houston, TX 77030 USA TI - Hyperuricemia causes glomerular hypertrophy in the rat AB - Background/Aims: Rats with mild hyperuricemia develop systemic hypertension, interstitial renal disease, afferent arteriolopathy, and increased renin expression [Mazzali et al.: Am J Physiol 2002;6:F991-F9971. We hypothesized that hyperuricemia might also induce glomerular changes. Methods: We reviewed renal biopsies of rats previously made hyperuricemic for 7 weeks with the uricase inhibitor, oxonic acid. Controls included normal rats and oxonic acid-treated rats administered allopurinol, benziodarone, hydrochlorothiazide, or enalapril. Glomeruli were examined for size (computer image analysis) and structure (histology). An additional group of rats were administered oxonic acid or control diet for 6 months. Results: Renal biopsies showed that hyperuricemic rats had a 30% increase in glomerular tuft area (p < 0.01); these changes were prevented by allopurinol and benziodarone. Control of blood pressure with hydrochlorothiazide did not prevent the development of glomerular hypertrophy, whereas enalapril partially reduced the glomerular hypertrophy. Prolonged hyperuricemia was associated with the development of microal-buminuria (p < 0.05) and glomerulosclerosis (22 vs. 10%, p < 0.05) compared to control rats. Conclusions: Hyperuricemic rats develop glomerular hypertrophy that can be prevented in part by ACE inhibitor therapy. Prolonged hyperuricemia is associated with the development of glomerulosclerosis in the rat MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 45 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0250-8095 UR - ISI:000179105200002 L2 - uric acid;glomerular hypertrophy;glomerulosclerosis;RENAL-DISEASE; NEPHROPATHY; HYPERTENSION; GROWTH SO - American Journal of Nephrology 2003 ;23(1):2-7 8941 UI - 7501 AU - Nakanishi T AU - Inatomi Y AU - Arai S AU - Yamada T AU - Fukatsu H AU - Murata H AU - Inada A AU - Matsuura N AU - Ubukata M AU - Murata J AU - Iinuma M AU - Farrea MAP AU - Tanaka T AD - Setsunan Univ, Fac Pharmaceut Sci, Hirakata, Osaka 5730101, JapanToyama Prefectural Univ, Toyama 9390398, JapanUniv Tokyo, Grad Sch Sci, Bunkyo Ku, Tokyo 1120001, JapanGifu Pharmaceut Univ, Gifu 5025858, JapanUNICACH, Escula Biol, Chiapas, MexicoGifu Prefectural Inst Hlth & Environm Sci, Gifu 8040838, JapanNakanishi, T, Setsunan Univ, Fac Pharmaceut Sci, 45-1 Nagaotoge Cho, Hirakata, Osaka 5730101, Japan TI - New luteolin 3 '-O-acylated rhamnosides from leaves of Bursera graveolens AB - Three new luteolin 3'-O-rhamnopyranosides with an acetyl and/or a p-coumaroyl groups were isolated from leaves of Bursera graveolens along with five known flavonol glycosides, beta-sitosterol 3-O-beta-glucopyranoside and alpha-amyrin. The structures of the isolated compounds were determined by spectroscopic analysis. Their inhibitory activities for the Maillard reaction were also investigated MH - Japan MH - Mexico|Chiapas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0385-5414 UR - ISI:000185307100007 SO - Heterocycles 2003 ;60(9):2077-2083 8942 UI - 8542 AU - Nannipieri M AU - Posadas R AU - Williams K AU - Politi E AU - Gonzales-Villalpando C AU - Stern MP AU - Ferrannini E AD - Univ Pisa, Dept Internal Med, CNR, Inst Clin Physiol, I-56100 Pisa, ItalyUniv Pisa, Inst Clin Physiol, CNR, Metab Unit, I-56100 Pisa, ItalyUniv Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78284, USAAmer British Cowdray Hosp, Ctr Study Diabet, Mexico City, DF, MexicoNannipieri, M, Univ Pisa, Dept Internal Med, CNR, Inst Clin Physiol, Via Roma 67, I-56100 Pisa, Italy TI - Association between polymorphisms of the Atrial Natriuretic Peptide gene and proteinuria: a population-based study AB - Aims/hypothesis. In case-control studies, polymorphisms at the atrial natriuretic peptide gene (ANP) locus have been associated with presence of albuminuria in Type I and Type 2 diabetes. We evaluated the relationship between the ScaI and BstxI polymorphisms and albuminuria in the general population of the Mexico City Diabetes Study. Methods Allele/genotype frequencies were analysed by PCR-RFLP analysis using ScaI (wild, A(2) vs mutated, A(1)) and BstxI (wild, C-708 vs mutated, T-708) enzyme. Results. Among 1288 subjects, hypertension was present in 112 subjects, Type 2 diabetes in 191 and impaired glucose tolerance in 136; microalbuminuria was present in 464 subjects, and clinical proteinuria in 199. General frequencies were 0.93 and 0.96 for the wild alleles, and 0.07 and 0.04 for the mutated alleles, respectively for ScaI and BstxI. Frequency of A(1) was 0.08 in normoalbuminuric, 0.05 in microalbuminuric, and 0.05 in proteinuric patients (chi(2)=7.3, p=0.025). Frequency of T-708 was 0.06 in normoalbuminuric and 0.03 microalbuminuric and 0.03 in proteinuric subjects (chi(2)=8.1, p=0.017). By multivariate analysis, the associations between A(1) or T-708 allele and albuminuria were independent of age, sex, BMI, diabetes, and hypertension, (odds ratio (OR) 0.60, p=0.01, (OR) 0.51, p=0.004, respectively). Conclusion/interpretation. In the general population of Mexico City, both polymorphisms of ANP are associated with albuminuria independently of hypertension, and could play a role in protecting subjects against development of albuminuria MH - Italy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0012-186X UR - ISI:000182620000017 L2 - atrial natriuretic peptide;diabetes;albuminuria;hypertension;nephropathy;myocardial infarction;stroke;DIABETIC NEPHROPATHY; HYPERTENSION; PERMEABILITY; MELLITUS SO - Diabetologia 2003 ;46(3):429-432 8943 UI - 7564 AU - Narro L AU - Pandey S AU - Crossa J AU - De Leon C AU - Salazar F AD - CIMMYT, Mexico City 06600, DF, MexicoCIMMYT, Int Maize & Wheat Improvement Ctr, Cali, ColombiaPandey, S, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Using line x tester interaction for the formation of yellow maize synthetics tolerant to acid soils AB - Breeders need more information on selecting testers to identify lines for formation of synthetics and need more user-friendly methods to study general combining ability (GCA) and specific combining ability (SCA) of genotypes. Forty-three lines were crossed to two narrow-based (S3 line and S3 X S3 hybrid) and two broad-based testers, which were open-pollinated varieties (OPVs). Topcrosses (line X tester, L X T) were evaluated in eight acid soil environments. The additive main effect and multiplicative interaction (AMMI) and the site regression (SREG) models were used to study the GCA of the testers and lines and the SCA of the L X T interaction. The SREG biplot contains the effect of the lines plus the L X T interaction and displays both GCA and SCA, whereas the AMMI biplot contains the effect of the L X T interaction and displays only the SCA. One synthetic was developed by recombining six lines identified as superior by each tester. The four synthetics were evaluated in 12 acid and nine nonacid soil environments. The synthetic developed with the S3 line as tester yielded the highest and the one developed with an OPV as tester yielded the lowest. The AMMI and SREG models seem to provide an effective tool to visualize and study GCA and SCA of genotypes MH - Colombia MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000185174300019 L2 - RECURRENT SELECTION; RECIPROCAL RECURRENT; COMBINING ABILITY; TROPICAL MAIZE; PERFORMANCE; REGISTRATION; IMPROVEMENT; POPULATIONS; BIPLOTS; TRIAL SO - Crop Science 2003 ;43(5):1718-1728 8944 UI - 9032 AU - Narvaez L AU - Cano E AU - Bastidas JM AD - CSIC, Natl Ctr Met Res, CENIM, E-28040 Madrid, SpainUASLP, Inst Met, San Luis Potosi 78210, MexicoBastidas, JM, CSIC, Natl Ctr Met Res, CENIM, Avda Gregorio Del AMo 8, E-28040 Madrid, Spain TI - Effect of ferric ions in AISI 316L stainless steel pickling using an environmentally-friendly H2SO4-HF-H2O2 mixture AB - A mixture of hydrogen peroxide, sulphuric and hydrofluoric acids has been used as pickling solution at pH 2.0 for AISI 316L austenitic stainless steel (SS). The stability of the H2SO4-HF-H2O2 mixture is assessed varying the ferric ions content from 0 to 40 g/L, the temperature from 25 to 60 degreesC, and with and without stirring of the pickling solution. The AISI 316L SS pickling rate at 50 degreesC was 2.6 and 0.2 mg/dm(2) day (mdd) in the absence and presence of 40 g/L ferric ions, respectively. p-toluene sulphonic acid (PTSA) has been used as stabiliser of hydrogen peroxide MH - Mexico|San Luis Potosi MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0947-5117 UR - ISI:000181297300002 SO - Materials and Corrosion-Werkstoffe und Korrosion 2003 ;54(2):84-87 8945 UI - 9506 AU - Nava-Castaneda A AU - Tovilla-Canales JL AU - Rodriguez L AU - Pomar JLTY AU - Jones CE AD - Fdn Conde Valenciana, Inst Oftalmol, Mexico City, DF, MexicoJones, CE, 8602 Mossford Dr, Huntington Beach, CA 92646, USA TI - Effects of lacrimal occlusion with collagen and silicone plugs on patients with conjunctivitis associated with dry eye AB - Purpose. To determine whether canalicular occlusion with collagen and silicone plugs reduces the severity of symptoms in patients with conjunctivitis secondary to dry eye. Methods. This was a prospective, randomized, double-masked study conducted at a single center in Mexico, in which 61 patients with dry eye/conjunctivitis were assigned to progressive lacrimal occlusion with collagen and silicone plugs or a sham procedural group. Outcome variables included total and individual dry eye and conjunctivitis symptom scores, moisturizing agent usage, best-corrected visual acuity, ocular comfort level, visual performance, corneal/conjunctival fluorescein staining, and incidence of adverse events. Results. Total dry eye and conjunctival symptom scores were reduced by 43.7 and 33.7%, respectively 2 weeks after occlusion of all four lacrimal canaliculi with collagen plugs, increasing to 77.4 and 72.1% 2 weeks later following superior canalicular occlusion of both eyes with silicone plugs and inferior placement of collagen plugs. At the 8-week visit (4 weeks after silicone plug implantation of the inferior canaliculi of both eyes), the reduction in total dry eye and conjunctival symptom scores further increased to 94.2 and 93.0%, respectively, accompanied,by a marked decline in each of the seven individual symptom scores (dryness, watery eyes, itching, burning, foreign body, fluctuating vision, and light sensitivity). In concert with these changes, moisturizing agent usage and corneal/conjunctival fluorescein staining decreased in a progressive fashion over the 8-week study period, and best-corrected visual acuity, ocular comfort, and visual performance improved in the absence of any treatment-related adverse events except for one case of epiphora. The response of patients to lacrimal occlusion can be sharply contrasted with the sham procedure group, which remained relatively unchanged from baseline at each of the study visits. Conclusions. Progressive lacrimal occlusion with collagen and silicone plugs was of clinical benefit to patients with dry eye and conjunctivitis MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Ophthalmology U5 - J;Article AV - English IS - 0277-3740 UR - ISI:000180031200003 L2 - dry eye/conjunctivitis;canalicular occlusion;collagen plugs;herrick lacrimal plug;PUNCTAL OCCLUSION; KERATOCONJUNCTIVITIS SO - Cornea 2003 ;22(1):10-14 8946 UI - 7215 AU - Nava-Ocampo AA AU - Salmeron J AU - Garduno-Espinosa J AU - ntonio-Ocampo A AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaIMSS, Hosp Gen Reg 1, Epidemiol & Hlth Serv Res Unit, Cuernavaca, Morelos, MexicoIMSS, Coordinac Ateneion Med, Div Calidad & Desempeno, Mexico City, DF, MexicoIMSS, Ctr Med Nacl Siglo 21, Hosp Especialidades, Dept Ensenaza & Invest, Mexico City, DF, MexicoNava-Ocampo, AA, Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, Mexico TI - A lack of a proper pharmaceutical presentation of vecuronium used in paediatric anaesthesia may affect drug utilization and costs MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Anesthesiology;Pediatrics U5 - J;Letter AV - English IS - 1155-5645 UR - ISI:000185873900025 SO - Paediatric Anaesthesia 2003 ;13(8):743-744 8947 UI - 9081 AU - Nava-Ocampo AA AU - Shafer SL AU - Velaquez-Armenta Y AU - Ruiz-Velazco S AU - Toni B AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City 06720, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaStanford Univ, Dept Anesthesia, Stanford, CA 94305, USAHosp Infantil Mexico Dr Federico Gomez, Dept Clin Pharmacol, Mexico City 06720, DF, MexicoUNAM, Inst Invest Matemat Aplicadas & Sistemas, Mexico City, DF, MexicoCtr Res Math, Montreal, PQ, CanadaNava-Ocampo, AA, Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Dr Marquez 162, Mexico City 06720, DF, Mexico TI - Mathematical analysis of a pharmacodynamic model without plasma concentrations to extend its applicability AB - Using a mathematical approach, we analyzed the behavior of the PID model originally described by Bragg et al. The effect was dose-dependent modified until a maximum value (E-max) was reached. Further increments in dose prolonged the E-max, but the recovery phase did not increase beyond a calculable asymptope. In the absence of plasma concentrations, it was impossible to distinguish the rate of plasma equilibration with the effect compartment (k(e0)) from the rate of drug elimination (k(e1)). Variations on the sigmoidicity affected both the onset and offset of drug effect. Sigmoidicity and the slowest rate constant had identical effects on the spontaneous reversion of the effect, as judged by the recovery index. The IR50, the index of potency, merely shifted the dose-response relationship to the left or right. Changes in IR50 were compensated for by making the same proportional changes in dose. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 1 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0306-9877 UR - ISI:000181152100029 SO - Medical Hypotheses 2003 ;60(3):453-457 8948 UI - 9006 AU - Nava H AU - Ornelas C AU - Aguilar A AU - Berhault G AU - Fuentes S AU - Alonso G AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, MexicoUniv Poitiers, Catalyse Chim Organ Lab, UMR CNRS 6503, F-86022 Poitiers, FranceUNAM, Dept Catalisis, CCMC, Ensenada 22830, Baja California, MexicoAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, Mexico TI - Cobalt molybdenum sulfide catalysts prepared by in situ activation of bimetallic (Co-Mo) alkylthiomolybdates AB - Unsupported cobalt molybdenum sulfide catalysts were prepared from bimetallic CoMo alkyl precursors by in situ activation during the hydrodesulfurization (HDS) of dibenzothiophene (DBT). The bimetallic CoMo precursors were prepared by reaction of tetraalkylammonium thiomolybdate salts, (R4N)(2)MoS4 ( where R = H, methyl, butyl, pentyl or hexyl), with CoCl2 in water at a Co/Mo molar ratio of 0.3. These catalysts exhibit a "Swiss-cheese"-like morphology, high surface areas (from 52 up to 320 m(2)/g), high content of carbon (C/Mo = 2.2-3.3) and type IV adsorption-desorption isotherms of nitrogen. The in situ activation of these tetraalkylammonium thiobimetalate precursors leads to a mesoporous structure with pore size ranging from 2 to 4.5 nm. X-ray diffraction showed that the structure of unsupported cobalt molybdenum sulfide catalysts corresponds to a poorly crystalline structure characteristic of 2H-MoS2 with low-stacked layers. The nature of the alkyl group strongly affects both the surface area and the HDS activity. The catalytic activity is strongly enhanced when using carbon-containing precursors; the CoMo catalysts prepared by in situ activation of Co/[N(C4H9)(4)](2)MoS4 presents the highest HDS activity. The highest surface area of the catalysts was observed for the CoMo catalyst formed from Co/[N(C6H13)(4)N](2)MoS4 MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000181395000017 L2 - bimetallic precursors;in situ activation;hydrodesulfurization;CoMo catalysts;TRANSITION-METAL SULFIDES; TETRAALKYLAMMONIUM THIOMOLYBDATES; AQUEOUS-SOLUTION; WS2 CATALYSTS; HYDRODESULFURIZATION; HYDROGENATION; THIOTUNGSTATES; MECHANISM; CARBIDE; DECOMPOSITION SO - Catalysis Letters 2003 ;86(4):257-265 8949 UI - 6829 AU - Navabi A AU - Singh RP AU - Tewari JP AU - Briggs KG AD - Univ Alberta, Dept Agr Food & Nutr Sci, Agr Forestry Ctr 4 10, Edmonton, AB T6G 2P5, CanadaCIMMYT, Mexico City 06600, DF, MexicoTewari, JP, Univ Alberta, Dept Agr Food & Nutr Sci, Agr Forestry Ctr 4 10, Edmonton, AB T6G 2P5, Canada TI - Genetic analysis of adult-plant resistance to leaf rust in five spring wheat genotypes AB - Inheritance of adult-plant resistance to leaf rust, caused by Puccinia triticina, was studied in the progeny of a one-way diallel cross involving five CIMMYT-derived adult-plant resistant wheat (Triticum aestivum) genotypes and a susceptible wheat 'Avocet-YrA'. F-1 progenies, F-2 populations, F-2-derived F-3, and F-4-derived F-5 lines were field evaluated under artificial epidemics with leaf rust race MCJ/SP. Adult-plant resistance to leaf rust was incompletely dominant in crosses with the susceptible parent and was found to be controlled by additive interactions of Lr34 with at least two to three additional genes. Transgressive segregation giving rise to plants or lines with higher and lower levels of resistance than the parents was observed in all F-2 and F-5 derivatives of the resistant-parent intercrosses and suggested that, apart from Lr34, some of the other additive genes were nonallelic. Although specific combining ability was significant in some generations, general combining ability was found to be the major component of variation. Among generations, the estimates of the narrow-sense heritability of adult-plant resistance to leaf rust ranged from 0.67 to 0.97 MH - Canada MH - Mexico|Distrito Federal PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000186712600018 L2 - diallel analysis;TRANSGRESSIVE SEGREGATION; PUCCINIA-RECONDITA; DIALLEL ANALYSIS; LATENT PERIOD; WINTER-WHEAT; INHERITANCE; LR34; CULTIVARS; NUMBER SO - Plant Disease 2003 ;87(12):1522-1529 8950 UI - 7313 AU - Navarrete-Vazquez G AU - Yepez L AU - Hernandez-Campos A AU - Tapia A AU - Hernandez-Luis F AU - Cedillo R AU - Gonzalez J AU - Martinez-Fernandez A AU - Martinez-Grueiro M AU - Castillo R AD - Univ Nacl Autonoma Mexico, Dept Farmacia, Fac Quim, Mexico City 04510, DF, MexicoIMSS, Unidad Invest Med Enfermedades Infecc & Parasitar, Mexico City 06720, DF, MexicoIMSS, UADY, Unidad Interinst Infest Med, Merida, VenezuelaUniv Complutense Madrid, Fac Farm, Dept Parasitol, Madrid 28040, SpainNavarrete-Vazquez, G, Univ Nacl Autonoma Mexico, Dept Farmacia, Fac Quim, Mexico City 04510, DF, Mexico TI - Synthesis and antiparasitic activity of albendazole and mebendazole analogues AB - Albendazole (Abz) and Mebendazole (Mbz) analogues have been synthesized and in vitro tested against the protozoa Giardia lamblia, Trichomonas vaginalis and the helminths Trichinella spiralis and Caenorhabditis elegans. Results indicate that compounds 4a, 4b (Abz analogues), 12b and 20 (Mbz analogues) are as active as antiprotozoal agents as Metronidazole against G. lamblia. Compound 9 was 58 times more active than Abz against T. vaginalis. Compounds 8 and 4a also shown high activity against this protozoan. Compounds 4b and 5a were as active as Abz. None of the Mbz analogues showed activity against T. vaginalis. The anthelmintic activity presented by these compounds was poor. (C) 2003 Published by Elsevier Ltd MH - Mexico|Distrito Federal MH - Spain MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Chemistry, Medicinal;Chemistry, Organic U5 - J;Article AV - English IS - 0968-0896 UR - ISI:000185877700010 L2 - INVITRO SUSCEPTIBILITY; GIARDIA-LAMBLIA; BENZIMIDAZOLES; DERIVATIVES; AGENTS SO - Bioorganic & Medicinal Chemistry 2003 ;11(21):4615-4622 8951 UI - 8777 AU - Navarrete M AU - Villagran-Muniz M AU - Ponce L AU - Flores T AD - Univ Nacl Autonoma Mexico, Inst Ingn, Edificio 12, Secc Ing Mecan Term & Fluidos, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Instrumentos, Unidad Fotofis, Mexico City 04510, DF, MexicoInst Politecn Nacl, CICATA, Altamira 89600, Tamaulipas, MexicoUniv La Habana, IMRE, CP-10400 Havana 4, CubaNavarrete, M, Univ Nacl Autonoma Mexico, Inst Ingn, Edificio 12, Secc Ing Mecan Term & Fluidos, Apartado Postal 70-472, Mexico City 04510, DF, Mexico TI - Photoacoustic detection of microcracks induced in BK7 glass by focused laser pulses AB - An experimental investigation on the induced damage by accumulative pulses generated by. a Nd:YAG laser beam focused into the bulk of the BK7 glass is reported in this work. The laser was operated at the single-pulse damage energy threshold of the sample. The optical detonation generates a shock wave emission and. microcrack formation. The induced photoacoustic wave emerging from the-sample was monitored by piezoelectric detection. These signals provide a simple, reliable and highly sensitive indication of damage, processes involved, and the most appropriate laser parameters for two- and three-dimensional engraving. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0143-8166 UR - ISI:000182137900002 L2 - laser photodisruption;laser-induced damage (LID);photoacoustic technique;INDUCED DAMAGE; TRANSPARENT MATERIALS; FEMTOSECOND LASER; WAVE-GUIDES SO - Optics and Lasers in Engineering 2003 ;40(1-2):5-11 8952 UI - 7105 AU - Navarro-Gonzalez R AU - Rainey FA AU - Molina P AU - Bagaley DR AU - Hollen BJ AU - de la Rosa J' AU - Small AM AU - Quinn RC AU - Grunthaner FJ AU - Caceres L AU - Gomez-Silva B AU - Mckay CP AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoUniv Paris 12, Lab Interuniv Syst Atmospher, CNRS, UMR 7583, F-94010 Creteil, FranceUniv Paris 07, Lab Interuniv Syst Atmospher, CNRS, UMR 7583, F-94010 Creteil, FranceLouisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803, USANASA, Div Space Sci, Ames Res Ctr, Moffett Field, CA 94035, USANASA, Jet Prop Lab, Pasadena, CA 91109, USAUniv Antofagasta, Fac Ingn, Inst Desierto, Antofagasta, ChileUniv Antofagasta, Fac Ingn, Dept Ingn Quim, Antofagasta, ChileUniv Antofagasta, Fac Ciencias Salud, Inst Desierto, Antofagasta, ChileUniv Antofagasta, Fac Ciencias Salud, Dept Biomed, Unidad Bioquim, Antofagasta, ChileNavarro-Gonzalez, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Circuito Exterior,Ciudad Univ,Apartado Postal 70-, Mexico City 04510, DF, Mexico TI - Mars-like soils in the Atacama Desert, Chile, and the dry limit of microbial life AB - The Viking missions showed the martian soil to be lifeless and depleted in organic material and indicated the presence of one or more reactive oxidants. Here we report the presence of Mars-like soils in the extreme arid region of the Atacama Desert. Samples from this region had organic species only at trace levels and extremely low levels of culturable bacteria. Two samples from the extreme arid region were tested for DNA and none was recovered. Incubation experiments, patterned after the Viking labeled-release experiment but with separate biological and nonbiological isomers, show active decomposition of organic species in these soils by nonbiological processes MH - Chile MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 44 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000186396300039 SO - Science 2003 ;302(5647):1018-1021 8953 UI - 8797 AU - Navarro-Quezada A AU - Gonzalez-Chauvet R AU - Molina-Freaner F AU - Eguiarte LE AD - McGill Univ, Dept Biol, Montreal, PQ H3A 1B1, CanadaUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoNavarro-Quezada, A, Univ Laval, Ctr Rech Biol Forestiere, St Foy, PQ G1K 7P4, Canada TI - Genetic differentiation in the Agave deserti (Agavaceae) complex of the Sonoran desert AB - The Agave deserti complex, comprising A. deserti, A. cerulata and A. subsimplex, represents a group of species and subspecies with a near allopatric distribution and clear differences in morphology. Genetic differentiation and taxonomic status with respect to spatial distribution of 14 populations of the complex were analyzed in an effort to understand the evolution and speciation process within the genus. Allelic frequencies, levels of genetic variation, expected heterozygosity (H-S), proportion of polymorphic loci (P), and genetic differentiation (theta and Nei's genetic distance) were estimated using 41 putative l loci. All three species show high levels of genetic variation (H-S = 0.12-0.29, P = 63.4-95.1), and low genetic differentiation between populations and species (theta populations = 0.14+/-0.02 (SE); G(st) = 0.11 +/- 0.02). Accordingly, gene flow among populations was estimated as high by three different methods (N-m = 2.91-6.14). Nei's genetic distances between the three species were low compared to the values obtained from other Agavaceae, and there was no clear correlation with taxonomic divisions. In a UPGMA analysis, A. subsimplex and A. cerulata formed exclusive monospecific clusters, whereas the A. deserti populations appear in more than one cluster together with other species. The results were consistent with a pattern of genetic isolation by distance MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-067X UR - ISI:000182043000004 L2 - Agavaceae;Agave deserti;genetic structure;RAPDs;Sonoran desert;speciation;DIVERSITY; FLOW SO - Heredity 2003 ;90(3):220-227 8954 UI - 7094 AU - Navarro F AU - Davalos F AU - Denes F AU - Cruz LE AU - Young RA AU - Ramos J AD - Univ Guadalajara, Wood Cellulose & Paper Res Dept, Guadalajara 44430, Jalisco, MexicoUniv Wisconsin, Ctr Plasma Aided Mfg, Madison, WI 53706, USAUniv Wisconsin, Dept Biol Syst Engn, Madison, WI 53706, USAUniv Wisconsin, Dept Forest Ecol Management, Madison, WI 53706, USARamos, J, Univ Guadalajara, Wood Cellulose & Paper Res Dept, Guadalajara 44430, Jalisco, Mexico TI - Highly hydrophobic sisal chemithermomechanical pulp (CTMP) paper by fluorotrimethylsilane plasma treatment AB - Fluorinated thin layers were created on chemithermomechanical pulp (CTMP) sisal paper surfaces with fluorotrimethylsilane (FTMS) radio frequency-plasma conditions. It was found that the FTMS-discharge environments caused implantation of fluorine and -Si(CH3)(x) groups into the surface layers of the paper substrates. Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy and Electron Spectroscopy for Chemical Analysis, as well as Atomic Force Microscopy and Scanning Electron Microscopy analyses revealed a smooth surface for the FTMS plasma-treated paper, apparently covered completely with a cross-linked polymerized network. Although the plasma reaction takes place with the cellulose, hemicelluloses and lignin, it appears that the chemical linkage is mainly to the lignin component on the CTMP paper surface by means of mainly C-O-Si-F, with some C-Si-F structures. The CTMP fibers apparently have a high lignin surface concentration. The water absorption for the plasma-treated CTMP paper was reduced from greater than 300 to 17 g of water/m(2) and the contact angle increased from less than 15degrees to greater than 120degrees; the strength properties were only slightly reduced and the brightness was essentially unaffected with the FTMS plasma treatment MH - Mexico|Jalisco MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Paper & Wood;Materials Science, Textiles;Polymer Science U5 - J;Article AV - English IS - 0969-0239 UR - ISI:000186344500012 L2 - CTMP;hydrophobic paper;plasma modification;pulp modification;surface fluorination;X-RAY PHOTOELECTRON; ARGON PLASMA; FLUORINATION; WOOD SO - Cellulose 2003 ;10(4):411-424 8955 UI - 7162 AU - Navarro R AU - Guzman J AU - Saucedo I AU - Revilla J AU - Guibal E AD - Univ Guanajuato, Inst Invest Cient, Guanajuato 36040, MexicoEcole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, FranceNavarro, R, Univ Guanajuato, Inst Invest Cient, Cerro Venada S-N,Pueblito Rocha, Guanajuato 36040, Mexico TI - Recovery of metal ions by chitosan: Sorption mechanisms and influence of metal speciation AB - Chitosan is characterized by a high affinity for metal ions due to its high content of amine groups. The sorption mechanism depends on both the protonation of these amine groups and the speciation of metal ions. Metal cations may be adsorbed at pH close to neutrality by chelation mechanism while metal anions can be adsorbed in acidic solutions through ionic interactions with protonated amine groups. Several examples are considered. The first example focuses on Cd sorption, which proceeds by a chelation mechanism on free non-protonated amine groups in neutral media. In acidic solutions the protonation of amine groups limits the ability of amine groups to complex Cd. The cross-linking of chitosan with glutaraldehyde also results in a dramatic decrease of sorption properties due to the decrease in the density of complexation sites available for sorption. The sorption of vanadium(V) and molybdenum(VI) illustrates the high capacity of chitosan for the sorption of oxoanions. They are very efficiently sorbed in acidic solutions by ionic interactions. The correlation of sorption capacities with the distribution of metal species shows that the sorbent has a greater affinity for highly charged anionic species. The sorption of complex anionic species such as chloro-complexes of Pd and Pt; and that of copper complexed with organic ligands have also been studied. The optimum conditions for sorption are obtained when anionic complexes predominate in the solution. The chemical modification of chitosan, obtained by grafting of sulfur compounds, allows modifying the sorption mechanism: the ion-exchange polymer is transformed to a dual ion-exchange and chelating polymer MH - France MH - Mexico|Guanajuato PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 1616-5187 UR - ISI:000186165700008 L2 - adsorption;chitosan;ion exchangers;metal-polymer complexes;metal speciation;CROSS-LINKED CHITOSAN; GEL BEADS; URANYL IONS; DIFFUSION PROPERTIES; ADSORPTION CAPACITY; MOLYBDATE SORPTION; PALLADIUM SORPTION; PLATINUM SORPTION; AQUEOUS-SOLUTION; CHITIN SO - Macromolecular Bioscience 2003 ;3(10):552-561 8956 UI - 7693 AU - Nazzarro M AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, San Luis, ArgentinaZgrablich, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Energetic topography effects on mobile adsorption on heterogeneous surfaces at low coverage AB - Mobile adsorption on heterogeneous surfaces at low coverage is modeled via a gas-solid virial expansion, following the ideas of the generalized Gaussian model(6,12) to incorporate energetic topography effects. Adsorbate molecules interact among them via Lennard-Jones interactions. Model predictions are compared to Monte Carlo simulations of adsorption on heterogeneous solids obtained by doping a pure crystalline solid with different concentrations of impurities. Energetic topography effects are shown to be important and they are correctly predicted by the model at low coverage MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000184768600030 L2 - DIFFUSION SO - Langmuir 2003 ;19(17):6737-6743 8957 UI - 6719 AU - Nebot A AU - Mugica F AU - Cellier FE AU - Vallverdu M AD - Univ Politecn Catalunya, Llenguatges & Sistemes Informat, ES-08034 Barcelona, SpainInst Politecn Nacl, CICATA, Mexico City, DF, MexicoUniv Arizona, Dept Elect & Comp Engn, Tucson, AZ 85721, USAUniv Politecn Catalunya, Dept ESAII, Ctr Recerca Engn Biomed, E-08028 Barcelona, SpainNebot, A, Univ Politecn Catalunya, Llenguatges & Sistemes Informat, Modul C6-Campus N Jordi Girona Salgado,1-3, ES-08034 Barcelona, Spain TI - Modeling and simulation of the central nervous system control with generic fuzzy models AB - The analysis of the human cardiovascular system by means of modeling and simulation methodologies is of relevance from a medical point of view because it allows doctors to acquire a better understanding of cardiovascular physiology, offer more accurate diagnostics, and select better suited therapies. The cardiovascular system is composed of the hemodynamical system and the central nervous system (CNS). In this work, two generic models of the CNS for patients with coronary diseases are identified by means of the fuzzy inductive reasoning (FIR) methodology. One of the models is generic only in its structure, whereas the other one is a fully generic model. It is very useful for doctors to have available a generic CNS model for a group of patients with common characteristics because this model can be used to predict the future behavior of new patients with the same characteristics MH - Mexico|Distrito Federal MH - Spain MH - USA PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering U5 - J;Article AV - English IS - 0037-5497 UR - ISI:000187236200003 L2 - inductive reasoning;fuzzy systems;central nervous system;cardiovascular system;generic models;CARDIOVASCULAR-SYSTEM SO - Simulation-Transactions of the Society for Modeling and Simulation International 2003 ;79(11):648-669 8958 UI - 6950 AU - Nelson JL AU - Lambert NC AU - Brautbar C AU - El-Gabalaway H AU - Fraser P AU - Gorodezky C AU - Jonas B AU - Konenkov V AU - Martin J AU - Moxley G AU - Oen K AU - Papasteriades C AU - Schroeder M AU - Tikly M AU - Vejbaesya S AU - Yoo B AU - Lathrop M AU - Thorsby E AU - Thomsen G AU - McWeeney S AD - Fred Hutchinson Canc Res Ctr, Seattle, WA 98104, USAHadassah Med Ctr, IL-91120 Jerusalem, IsraelUniv Manitoba, Winnipeg, MB, CanadaBrigham & Womens Hosp, Boston, MA 02115, USASSA, InDRE, Inst Diagnost & Referencia Epidemiol, Mexico City, DF, MexicoUniv N Carolina, Chapel Hill, NC, USASB AMS, Inst Clin Immunol, Novosibirsk, RussiaInst Parasitol & Biomed Lopez Neyra, Granada, SpainVirginia Commonwealth Univ, Richmond, VA, USAEvangelismos Hosp, Athens, GreeceUniv Manitoba, Winnipeg, MB, CanadaChris Hani Baragwanath Hosp, Johannesburg, South AfricaUniv Witwatersrand, Johannesburg, South AfricaMahidol Univ, Siriraj Hosp, Bangkok, ThailandUniv Ulsan, Coll Med, Asan Med Ctr, Seoul, South KoreaCtr Natl Genotypage, Paris, FranceRikshospitalet Univ Hosp, Oslo, NorwayUniv Calif Berkeley, Berkeley, CA 94720, USAOregon Hlth Sci Univ, Portland, OR 97201, USA TI - The 13th International Histocompatibility Working Group for rheumatoid arthritis joint report MH - Canada MH - France MH - Greece MH - Israel MH - Mexico|Distrito Federal MH - Norway MH - Russia MH - South Africa MH - South Korea MH - Spain MH - Thailand MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432800309 SO - Arthritis and Rheumatism 2003 ;48(9):S143-S143 8959 UI - 8471 AU - Nelson KC AU - de Jong BHJ AD - Univ Minnesota, Dept Forest Resources, St Paul, MN 55108, USAUniv Minnesota, Dept Fisheries Wildlife & Conservat Biol, St Paul, MN 55108, USAEl Colegio Frontera Sur, Chiapas, MexicoNelson, KC, Univ Minnesota, Dept Forest Resources, 115 Green Hall,1530 Cleveland Ave No, St Paul, MN 55108 USA TI - Making global initiatives local realities: carbon mitigation projects in Chiapas, Mexico AB - Global, environmental initiatives create macro-level agreements, but the true test is how local communities respond. From 1995 to 2001, we investigated the evolution of Fondo Bioclimatico, a carbon mitigation project, using interviews and document review. Even under tremendous uncertainty the project grew seven-fold. Its social structure shifted from a development emphasis to a brokering relationship, from shared to concentrated power, from social fund to carbon bank. Social selection of systems with fewer tree species and single ecosystems is a concern for biodiversity. The challenge is to remain critical, monitor, and support indigenous communities in their endeavor to implement clean development mechanism projects. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Chiapas MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 14 U4 - Environmental Sciences;Environmental Studies;Geography U5 - J;Article AV - English IS - 0959-3780 UR - ISI:000182951100003 L2 - clean development mechanisms;Mexico;carbon sequestration;carbon mitigation;carbon markets;community agroforestry;COSTA-RICAN EXPERIENCE; ENVIRONMENTAL SERVICES; BIODIVERSITY; CONSERVATION; MANAGEMENT SO - Global Environmental Change-Human and Policy Dimensions 2003 ;13(1):19-30 8960 UI - 6800 AU - Newburg DS AU - Ruiz-Palacios GM AU - Altaye M AU - Chaturvedi P AU - Guerrero ML AU - Meinzen-Derr JK AU - Morrow AL AD - Univ Massachusetts, Sch Med, Shriver Ctr, Waltham, MA, USAInst Nacl Ciencias Med y Nutricion, Mexico City, DF, MexicoCincinnati Childrens Hosp, Ctr Med, Cincinnati, OH, USA TI - alpha 1,2-linked fucosyloligosaccharides comprise a major component of the innate immune system of human milk MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 0959-6658 UR - ISI:000186138200223 SO - Glycobiology 2003 ;13(11):885-885 8961 UI - 7394 AU - Newburg DS AU - Morrow AL AU - Matson DO AU - Peterson JA AU - Altaye M AU - Ruiz-Palacios GM AU - Pickering LK AD - Univ Massachusetts, Sch Med, Waltham, MA, USAChildrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USAEastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23501, USACanc Res Fund Contra Costa, Walnut Creek, CA, USAInst Nacl Ciencias Med & Nutr, Dept Infectol, Mexico City, DF, MexicoCtr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USA TI - Concentrations of anti-rotavirus components of human milk over the course of lactation MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000181897901777 SO - Pediatric Research 2003 ;53(4):311A-311A 8962 UI - 6755 AU - ngeles-Camacho C AU - Tortelli OL AU - Acha E AU - Fuerte-Esquivel CR AD - Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, ScotlandUniv Fed Parana, Dept Elect Engn, BR-81531990 Curitiba, Parana, BrazilUMSNH, Fac Ingn Elect, Div Estudios Posgrado Cuidad Univ, Morelia 58030, Michoacan, MexicoAngeles-Camacho, C, Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, Scotland TI - Inclusion of a high voltage DC-voltage source converter model in a Newton-Raphson power flow algorithm AB - Models for high voltage DC-voltage source converter (HVDC-VSC) controllers suitable for direct incorporation into Newton-Raphson power flow algorithms are presented. The models are developed from first principles, starting with a simple VSC model and progressing to encompass the full HVDC-VSC link model. The applied modelling approach is modular in nature and in addition to the shunt-connected voltage source model, which may be used to represent a STATCOM, a series-connected voltage source model is also developed. This enables significant modelling flexibility since by suitably combining shunt and/or series voltage sources several VSC-based flexible AC transmission system (FACTS) controller models are realised quite straightforwardly, namely the back-to-back HVDC-VSC, the full HVDC-VSC link and the unified power flow controller. Attention is focused on the HVDC-VSC models. The models are implemented into an existing OOP power flow computer program written in C++ that incorporates a wide portfolio of FACTS models. The models are tested for reliability towards the convergence and accuracy of results using several power systems with varying degrees of operational complexity and power flow control requirements MH - Brazil MH - Mexico|Michoacan MH - United Kingdom PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1350-2360 UR - ISI:000187085300008 L2 - NETWORKS; SYSTEMS; HVDC SO - Iee Proceedings-Generation Transmission and Distribution 2003 ;150(6):691-696 8963 UI - 6867 AU - Nickolas P AU - Tkachenko M AD - Univ Wollongong, Sch Math & Appl Stat, Wollongong, NSW 2522, AustraliaUniv Autonoma Metropolitana, Dept Matemat, Mexico City 09340, DF, MexicoNickolas, P, Univ Wollongong, Sch Math & Appl Stat, Wollongong, NSW 2522, Australia TI - Local compactness in free topological groups AB - We show that the subspace A(n)(X) of the free Abelian topological group A(X) on a Tychonoff space X is locally compact for each n is an element of omega if and only if A(2)(X) is locally compact if and only if F-2(X) is locally compact if and only if X is the topological sum of a compact space and a discrete space. It is also proved that the subspace F-n(X) of the free topological group F(X) is locally compact for each n is an element of omega if and only if F-4(X) is locally compact if and only if F-n(X) has pointwise countable type for each n is an element of omega if and only if F-4(X) has pointwise countable type if and only if X is either compact or discrete, thus refining a result by Pestov and Yamada. We further show that A(n)(X) has pointwise countable type for each n is an element of omega if and only if A(2)(X) has pointwise countable type if and only if F-2(X) has pointwise countable type if and only if there exists a compact set C of countable chaxacter in X such that the complement X\C is discrete. Finally, we show that F-2(X) is locally compact if and only if F-3(X) is locally compact, and that F-2(X) has pointwise countable type if and only if F-3(X) has pointwise countable type MH - Australia MH - Mexico|Distrito Federal PB - CANBERRA: AUSTRALIAN MATHEMATICS PUBL ASSOC INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0004-9727 UR - ISI:000186852500008 L2 - DIMENSION; SPACES SO - Bulletin of the Australian Mathematical Society 2003 ;68(2):243-265 8964 UI - 8303 AU - Nieves N AU - Segura-Nieto M AU - Blanco MA AU - Sanchez M AU - Gonzalez A AU - Gonzalez JL AU - Castillo R AD - Univ Ciego de Avila, Ctr Bioplantas, Ciego De Avila, CubaCINVESTAV, UI, Irapuato, Gto, MexicoNieves, N, Univ Ciego de Avila, Ctr Bioplantas, Carretera Moron Km 9,CP 69450, Ciego De Avila, Cuba TI - Biochemical characterization of embryogenic and non-embryogenic calluses of sugarcane AB - With the aim to determine a possible relationship between somatic embryogenesis and some metabolic contents in embryogenic and non-embryogenic calluses of sugarcane (Saccharum sp. var CP-5243), the present study was carried out. Embryogenic callus has more soluble proteins, free proline, proteolytic activity, soluble sugars, and invertase, and lower putrescine/(spermidine + spermine) than non-embryogenic tissue. Non-embryogenic callus has a higher peroxidase and gallic acid level, lower dry matter/fresh matter ratio, and more gross fat compared with embryogenic callus MH - Cuba MH - Mexico|Guanajuato PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Cell Biology;Developmental Biology U5 - J;Article AV - English IS - 1054-5476 UR - ISI:000183217800015 L2 - carbohydrates;enzymes;phenolics;polyamines;protein;Saccharum sp.;MAIZE ZEA-MAYS; SOMATIC EMBRYOGENESIS; PHENOLIC-ACIDS; ABSCISIC-ACID; HIGHER-PLANTS; PROLINE; POLYAMINES; CULTURES; CELLS SO - In Vitro Cellular & Developmental Biology-Plant 2003 ;39(3):343-345 8965 UI - 8215 AU - Nigenda G AU - Langer A AU - Kuchaisit C AU - Romero M AU - Rojas G AU - Al-Osimy M AU - Villar J AU - Garcia J AU - Al-Mazrou Y AU - Ba'aqeel H AU - Carroli G AU - Farnot U AU - Lumbiganon P AU - Belizan J AU - Bergsjo P AU - Bakketeig L AU - Lindmark G AD - Fdn Mexicana Salud, Mexico City, DF, MexicoPopulat Council, Reg Off Latin Amer & Caribbean, Mexico City, DF, MexicoKhon Kaen Univ, Khon Kaen, ThailandConsejo Nacl Invest Cient & Tecn, Ctr Estudios Estado & Soc, Ctr Rosarino Estudios Perinatales Rosario, RA-1033 Buenos Aires, DF, ArgentinaHosp Ginecoobstet Amer Arias, Havana, CubaNatl Guard King Khalid Hosp, Jeddah, Saudi ArabiaWHO, Special Programme Res Dev & Res Training Human Re, CH-1211 Geneva, SwitzerlandUniv Oxford, Natl Perinatal Epidemiol Unit, Oxford, EnglandMinist Hlth, Riyadh, Saudi ArabiaLatin Amer Ctr Perinatol & Human Dev, Montevideo, UruguayDept Obstet & Gynecol, Oslo, NorwayUniv Bergen, Dept Obstet & Gynecol, Bergen, NorwayUniv Uppsala Hosp, Dept Obstet & Gynecol, Uppsala, SwedenNigenda, G, Fdn Mexicana Salud, Mexico City, DF, Mexico TI - Womens' opinions on antenatal care in developing countries: results of a study in Cuba, Thailand, Saudi Arabia and Argentina AB - Background: The results of a qualitative study carried out in four developing countries ( Cuba, Thailand, Saudi Arabia and Argentina) are presented. The study was conducted in the context of a randomised controlled trial to test the benefits of a new antenatal care protocol that reduced the number of visits to the doctor, rationalised the application of technology, and improved the provision of information to women in relation to the traditional protocol applied in each country. Methods: Through focus groups discussions we were able to assess the concepts and expectations underlying women's evaluation of concepts and experiences of the care received in antenatal care clinics. 164 women participated in 24 focus groups discussion in all countries. Results: Three areas are particularly addressed in this paper: a) concepts about pregnancy and health care, b) experience with health services and health providers, and c) opinions about the modified Antenatal Care (ANC) programme. In all three topics similarities were identified as well as particular opinions related to country specific social and cultural values. In general women have a positive view of the new ANC protocol, particularly regarding the information they receive. However, controversial issues emerged such as the reduction in the number of visits, particularly in Cuba where women are used to have 18 ANC visits in one pregnancy period. Conclusion: Recommendations to improve ANC services performance are being proposed. Any country interested in the application of a new ANC protocol should regard the opinion and acceptability of women towards changes MH - Argentina MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal MH - Norway MH - Saudi Arabia MH - Sweden MH - Switzerland MH - Thailand MH - Uruguay PB - LONDON: BIOMED CENTRAL LTD RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1471-2458 UR - ISI:000183542900001 L2 - RANDOMIZED CONTROLLED TRIAL; ULTRASOUND; QUALITY SO - Bmc Public Health 2003 ;3(): 8966 UI - 8359 AU - Niklas KJ AU - Molina-Freaner F AU - Tinoco-Ojanguren C AU - Hogan CJ AU - Paolillo DJ AD - Cornell Univ, Dept Plant Biol, Ithaca, NY 14853, USAUNAM, Inst Ecol, Hermosillo 83000, Sonora, MexicoNiklas, KJ, Cornell Univ, Dept Plant Biol, Ithaca, NY 14853, USA TI - On the mechanical properties of the rare endemic cactus Stenocereus eruca and the related species S-gummosus AB - We examined the hypothesis that the procumbent growth habit of the rare, columnar cactus Stenocereus eruca is in part the result of a diminution of the mechanical properties of stem tissues by comparing the properties of S. eruca plants with those of the putatively closely related semi-erect shrub S. gummosus. Intact stems and surgically removed anatomically comparable regions of the stems of both species were tested in bending and tension to determine their Young's modulus and breaking stress. A computer program was used to evaluate the contribution of each region to the capacity of entire stems to resist bending forces. Our analyses indicate that the principal stiffening agent in the stems of both species is a peripheral tissue complex (=epidermis and collenchyma, in the primary plant body) that has a significantly higher tensile breaking stress and greater extensibility for S. gummosus than that of S. eruca. Computer simulations indicate that the wood of either species contributes little to bending stiffness, except in very old portions of S. gummosus stems, because of its small volume and central location in the stem. These and other observations are interpreted to support the hypothesis that S. eruca evolved a procumbent growth habit as the result of manifold developmental alterations some of which reduced the capacity of tissues to support the weight of stems MH - Mexico|Sonora MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000183133400001 L2 - biomechanics;Cactaceae;flexural rigidity;procumbent stem growth;stem bending;Stenocereus SO - American Journal of Botany 2003 ;90(5):663-674 8967 UI - 7896 AU - Nocetti FG AU - Gonzalez JS AU - Stojmenovic I AD - Univ Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaUniv Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 04510, DF, MexicoStojmenovic, I, Univ Ottawa, SITE, Ottawa, ON K1N 6N5, Canada TI - Connectivity based k-hop clustering in wireless networks AB - In this paper we describe several new clustering algorithms for nodes in a mobile ad hoc network. The main contribution is to generalize the cluster definition and formation algorithm so that a cluster contains all nodes that are at distance at most k hops from the clusterhead. We also describe algorithms for modifying cluster structure in the presence of topological changes. We also proposed an unified framework for most existing and new clustering algorithm where a properly defined weight at each node is the only difference in otherwise the same algorithm. This paper studied node connectivity and node ID as two particular weights, for k=1 and k=2. Finally, we propose a framework for generating random unit graphs with obstacles MH - Canada MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Telecommunications U5 - J;Article AV - English IS - 1018-4864 UR - ISI:000184237400013 L2 - ad hoc wireless networks;clustering;broadcasting;PROTOCOL SO - Telecommunication Systems 2003 ;22(1-4):205-220 8968 UI - 8587 AU - Noguera-Obenza M AU - Ochoa TJ AU - Gomez HF AU - Guerrero ML AU - Herrera-Insua I AU - Morrow AL AU - Ruiz-Palacios G AU - Pickering LK AU - Guzman CA AU - Cleary TG AD - Univ Texas, Sch Med, Dept Pediat, Pediat Infect Dis Div, Houston, TX 77040, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoCincinnati Childrens Hosp, Cincinnati, OH, USACtr Dis Control & Prevent, Atlanta, GA, USAGBF, German Natl Res Ctr Biotechnol, Braunschweig, GermanyCleary, TG, Univ Texas, Sch Med, Dept Pediat, Pediat Infect Dis Div, 6431 Fannin,JFB 1-739, Houston, TX 77040 USA TI - Human milk secretory antibodies against attaching and effacing Escherichia coli antigens AB - Secretory immunoglobulin A (sIgA) is a primary factor responsible for preventing attachment of enteropathogens to gut epithelium in breastfeeding infants. We compared the frequency of sIgA to major surface antigens of enterohemorrhagic Escherichia coli (EHEC) in milk of 123 women from the United States and Mexico to determine whether regional differences existed in the frequency of antibodies to these surface antigens. In both groups of women, milk commonly has sIgA against various EHEC lipopolysaccharides, EspA, EspB, intimin, and less frequently against Shiga toxin. The study suggests that persons living in the U.S. are exposed to attaching/effacing enteropathogens more frequently than is generally assumed. The low frequency of antibodies to Stx1 (in 12% of Mexican and in 22% of U.S. samples) suggests that the rare appearance of hemolytic uremic syndrome in adults is not due to neutralization of toxin at the gut level. Only anti-EspA is found in most milk samples from both populations of women. EspA may represent a useful target for an immunization strategy to prevent EHEC disease in humans MH - Germany MH - Mexico|Distrito Federal MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000182569700006 L2 - OUTER-MEMBRANE PROTEINS; HUMAN COLOSTRUM; SHIGA-TOXIN; BREAST-MILK; HEP-2 CELLS; HELA-CELLS; VIRULENCE DETERMINANTS; SURFACE APPENDAGES; EPITHELIAL-CELLS; IGA ANTIBODIES SO - Emerging Infectious Diseases 2003 ;9(5):545-551 8969 UI - 6815 AU - Noriega-Crespo A AU - Raga AC AU - Masciadri E AD - CALTECH, SIRTF Sci Ctr, Pasadena, CA 91125, USAUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoUNAM, Astron Inst, Mexico City, DF, MexicoNoriega-Crespo, A, CALTECH, SIRTF Sci Ctr, Pasadena, CA 91125, USA TI - HH111STIS observations and their analysis using analytical and numerical models AB - The internal structure of stellar jets arising from young stellar objects is characterized by a series of 'knots' or condensations which have highly supersonic proper motions. These structures, we believe, are the result of a variable ejection from the source, which leads to the formation of internal working surfaces or small bowshock within the jet beam. In this paper we present a long-slit spectrum of Herbig-Haro object HH 111 obtained with STIS and an interpretation of this observation in terms of an ejection velocity variability model MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000186892600013 L2 - Herbig-Haro objects;jets and outflows;shock waves;HH-111 JET; KINEMATICS; IMAGES SO - Astrophysics and Space Science 2003 ;287(1-4):79-82 8970 UI - 8506 AU - Nouais D AU - Beole S AU - Bondila M AU - Bonvicini V AU - Cerello P AU - Crescio E AU - Giubellino P AU - Idzik M AU - Kolozhvari A AU - Kouchpil S AU - Torres EL AU - Martinez MI AU - Mazza G AU - Piano S AU - Piemonte C AU - Rashevsky A AU - Riccati L AU - Rivetti A AU - Tosello F AU - Trzaska WH AU - Vacchi A AU - Wheadon R AD - Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyUniv Jyvaskyla, SF-40351 Jyvaskyla, FinlandIst Nazl Fis Nucl, Sez Trieste, Trieste, ItalyCINVESTAV, Mexico City 14000, DF, MexicoNouais, D, Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy TI - The ALICE Silicon Drift Detector system AB - The project of the two Silicon Drift Detector (SDD) layers of the ALICE Inner Tracking System is reviewed, with details on the barrel construction and on the front-end electronics. The results on the SDD spatial resolution are reported as obtained in the 2000 beam test from a whole drift region of the detector. (C) 2002 Elsevier Science B.V. All rights reserved MH - Finland MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000182753200019 L2 - silicon detectors;drift detectors;position sensitive detectors;tracking SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2003 ;501(1):119-125 8971 UI - 7510 AU - Nyborg TG AU - Vega FJ AU - Filkorn HF AD - Loma Linda Univ, Dept Nat Sci, Loma Linda, CA 92350, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoNat Hist Museum Los Angeles, Dept Invertebrate Paleontol, Los Angeles, CA 90007, USANyborg, TG, Loma Linda Univ, Dept Nat Sci, Loma Linda, CA 92350, USA TI - New late Cretaceous and early cenozoic decapod crustaceans from California, USA: implications for the origination of taxa in the eastern North Pacific AB - Recent revision of Cretaceous and Paleocene brachyurans in the collections of the Natural History Museum of Los Angeles County has revealed the presence of several new species. Based upon these fossils and their ages, it is evident that they played a pivotal role in the origination and subsequent dispersal of decapod crustaceans within the eastern North Pacific MH - Mexico|Distrito Federal MH - USA PB - LELYSTAD: S P B ACADEMIC PUBLISHING BV RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0067-8546 UR - ISI:000185222100020 L2 - Brachyura;Paleocene;Cretaceous;Costacopluma;Coeloma;N-SP DECAPODA; SOUTHERN CALIFORNIA; RETROPLUMIDAE; BRACHYURA; PALEOCENE; MEXICO SO - Contributions to Zoology 2003 ;72(2-3):165-168 8972 UI - 6816 AU - O'Brien D AU - Garcia P AU - Ferreira J AU - Cabrit S AU - Binette L AD - Univ Porto, Ctr Astrofis, Oporto, PortugalFac Ciencias Porto, Dept Matemat Aplicada, Oporto, PortugalUniv Porto, Fac Engn, Oporto, PortugalLab Astrophys Grenoble, Grenoble, FranceObserv Paris, F-75014 Paris, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoO'Brien, D, Univ Porto, Ctr Astrofis, Oporto, Portugal TI - Mechanical heating in disk-driven winds - Thermal structure & observational predictions AB - Following the work of (Garcia et al., 2001a) (GFCB), we compute the thermal properties and ionization structure of magnetically-driven disk winds. The original model's dominant heating function along the jet, ambipolar diffusion, is augmented by a mechanical heating term supposed to arise from weak shocks, as used by (Shang et al., 2002). We add this mechanical heating function to a cold disk wind model and calculate its effect on the jet as a whole. The temperature and ionization of the flow are calculated in the case of cold jet solutions consistent with the underlying accretion disk (Ferreira, 1997). These solutions are compared to those of (GFCB) in order to quantitatively determine the effect of the mechanical heating on the flow. We then use the computed thermal and ionization structures to calculate jet synthetic observations. We find that the addition of mechanical heating leads to higher electron fractions, in turn leading to increased line fluxes and line ratios approaching observed values MH - France MH - Mexico|Distrito Federal MH - Portugal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000186892600020 L2 - ISM : Jets and Outflows;stars : pre-main sequence;MHD;line : profiles;accretion disks;T-TAURI STARS; ACCRETION-EJECTION STRUCTURES; FORBIDDEN-LINE EMISSION; AMBIPOLAR DIFFUSION; PROTOSTELLAR DISKS; YOUNG STARS; MASS-LOSS; JETS; FLOWS SO - Astrophysics and Space Science 2003 ;287(1-4):129-134 8973 UI - 8682 AU - O'Dell CR AU - Peimbert M AU - Peimbert A AD - Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoO'Dell, CR, Vanderbilt Univ, Dept Phys & Astron, Box 1807-B, Nashville, TN 37235 USA TI - Fine-scale temperature fluctuations in the Orion Nebula and the t(2) problem AB - We present a high spatial resolution map of the columnar electron temperature (T-c) of a region to the southwest of the Trapezium in the Orion Nebula. This map was derived from Hubble Space Telescope images that isolated the primary lines of H I for determination of the local extinction and of the [O III] lines for determination of T-c. Although there is no statistically significant variation of T-c with distance from the dominant ionizing star, theta(1) Ori C, we find small-scale variations in the plane of the sky down to a few arcseconds, which are compatible with the variations inferred from comparing the value of T-e derived from forbidden and recombination lines, commonly known as the t(2) problem. We present other evidence for fine-scale variations in conditions in the nebula, these being variations in the surface brightness of the nebula, fluctuations in radial velocities, and ionization changes. From our T-c map and other considerations we estimate that t(2) = 0.028 +/- 0.006 for the Orion Nebula. Shadowed regions behind clumps close to the ionization front can make a significant contribution to the observed temperature fluctuations, but they cannot account for the t(2) values inferred from several methods of temperature determination. It is shown that an anomalous broadening of nebular emission lines appears to have the same sense of correlation as the temperature anomalies, although a causal link is not obvious MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 26 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000182371800024 L2 - HII regions;ISM : abundances;ISM : individual (Orion);HERBIG-HARO OBJECTS; H-II REGIONS; CHEMICAL-COMPOSITION; ELECTRON-TEMPERATURE; PLANETARY-NEBULAE; HELIUM ABUNDANCE; EMISSION-LINES; TELESCOPE; PROPLYDS; BAR SO - Astronomical Journal 2003 ;125(5):2590-2608 8974 UI - 6861 AU - O'Neill M AU - Bateson T AU - Armstrong B AU - Romieu I AU - Schwartz JF AD - Harvard Univ, Sch Publ Hlth, Boston, MA 02115, USALondon Sch Hyg & Trop Med, London WC1, EnglandInst Nacl De Salud Publ, Cuernavaca, Morelos, Mexico TI - Examining modification of the effect of temperature on mortality in Mexico with the case-only design MH - United Kingdom MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000185488600245 SO - Epidemiology 2003 ;14(5):S101-S102 8975 UI - 6862 AU - O'Neill M AU - Hajat S AU - Zanobetti A AU - Ramirez-Aguilar M AU - Schwartz JF AD - Harvard Univ, Sch Publ Hlth, Boston, MA 02115, USALondon Sch Hyg & Trop Med, London WC1, EnglandInst Nacl De Salud Publ, Cuernavaca, Morelos, Mexico TI - Temperature and mortality associations by cause and age in two Mexican cities MH - United Kingdom MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1044-3983 UR - ISI:000185488600246 SO - Epidemiology 2003 ;14(5):S102-S102 8976 UI - 8967 AU - O'Neill MS AU - Ramirez-Aguilar M AU - Meneses-Gonzalez F AU - Hernandez-Avila M AU - Geyh AS AU - Sienra-Monge JJ AU - Romieu I AD - Natl Publ Hlth Inst, Sch Publ Hlth, Cuernavaca 62508, Morelos, MexicoJohns Hopkins Univ, Sch Publ Hlth, Baltimore, MD 21205, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City 06720, DF, MexicoNatl Inst Publ Hlth, Populat Res Ctr, Cuernavaca 62508, Morelos, MexicoPan Amer Hlth Org, Mexico City, DF, MexicoO'Neill, MS, Harvard Univ, Sch Publ Hlth, Environm Epidemiol Program, 665 Huntington Ave,Room 1410A, Boston, MA 02215 USA TI - Ozone exposure among Mexico City outdoor workers AB - in researching health effects of air pollution, pollutant levels from fixed-site monitors are commonly assigned to the subjects. However, these concentrations may not reflect the exposure these individuals actually experience. A previous study of ozone (O-3) exposure and lung function among shoe-cleaners-working in central Mexico City used fixed-site measurements from a monitoring station near the outdoor work sites as surrogates for personal exposure. The present study assesses the degree to which these estimates represented individual exposures. In 1996, personal O-3 exposures of 39 shoe-cleaners working outdoors were measured using an active integrated personal sampler. Using mixed models, we assessed the relationship between measured personal O-3 exposure and ambient O-3 measurements from the fixed-site monitoring station. Ambient concentrations were approximately 50 parts per billion higher, on average, than personal exposures. The association between personal and ambient O-3 was highly significant (mixed model slope p < 0.0001). The personal/ambient ratio was not constant, so use of the outdoor monitor would not be appropriate to rank O-3 exposure and evaluate health effects between workers. However, the strong within-worker longitudinal association validates previous findings associating day-to-day changes in fixed-site O-3 levels with adverse health effects among these shoe-cleaners and suggests fixed-site O-3 monitors may adequately estimate exposure for other repeated-measure health studies of outdoor workers MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000181448800008 L2 - PERSONAL EXPOSURES; GASEOUS-POLLUTANTS; CHILDREN; SCHOOLCHILDREN; PARTICULATE; PARTICLES; BALTIMORE; SAMPLER; HEALTH; INDOOR SO - Journal of the Air & Waste Management Association 2003 ;53(3):339-346 8977 UI - 9150 AU - Obermiller LE AU - Pfeiler E AD - Arizona State Univ, Mol & Cellular Biol Program, Tempe, AZ 85287, USACtr Invest Alimentacion & Dessarrollo AC, Unidad Guaymus, Guaymas 85480, Sonora, MexicoPfeiler, E, Arizona State Univ, Mol & Cellular Biol Program, Tempe, AZ 85287 USA TI - Phylogenetic relationships of elopomorph fishes inferred from mitochondrial ribosomal DNA sequences AB - The superorder Elopomorpha, a grouping which includes all teleost fishes that possess a specialized leptocephalous larva [true eels (Anguilliformes), gulpers and bobtail snipe eels (Saccopharyngiformes), bonefishes, spiny eels, and halosaurs (Albuliformes, including Notacanthiformes), ladyfishes and tarpons (Elopiformes, including Megalopiformes)] comprises >800 species for which phylogenetic relationships are poorly understood. In the present study, we analyzed mitochondrial DNA sequences in segments of the 12S and 16S rRNA genes in 33 elopomorph taxa encompassing all of the previously proposed orders, and 9 of the 15 currently recognized families of the Anguilliformes, as well as outgroup representatives from the superorders Osteoglossomorpha (nine species) and Clupeomorpha (three species), to develop phylogenetic hypotheses based on distance and parsimony methods. Both methods failed to support the monophyly of the Elopomorpha, casting doubt on the validity of the leptocephalus as an elopomorph synapomorphy. The orders Elopiformes, Albuliformes, and Anguilliformes, however, were resolved as monophyletic assemblages. Parsimony analysis supported the separation of the Anguilliformes into two groups (primitive and advanced) based on the presence of divided versus fused frontal bones. In addition, the molecular data indicated a close affinity of the anguilliform Thalassenchelys coheni (incertae sedis), known only from the leptocephalus, with the family Serrivomeridae. The implications of these data as regards the evolution of the elopomorph assemblage are discussed. (C) 2002 Elsevier Science (USA). All rights reserved MH - USA MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000181007600004 L2 - FRESH-WATER EELS; EUROPEAN EEL; EVOLUTION; ANGUILLIFORMES; LEPTOCEPHALI; SYSTEMATICS; CONFIDENCE; TELEOSTEI; ANGUILLA; LARVAE SO - Molecular Phylogenetics and Evolution 2003 ;26(2):202-214 8978 UI - 7475 AU - Obregon O AU - Patino L AU - Quevedo H AD - Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 OWA, EnglandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Guanajuato, Inst Fis, Leon 37150, MexicoObregon, O, Univ Cambridge, Dept Appl Math & Theoret Phys, Wilberforce Rd, Cambridge CB3 OWA, England TI - Towards the entropy of gravity time-dependent models via the Cardy-Verlinde formula AB - For models with several time-dependent components, generalized entropies can be defined. This is shown for the Bianchi type IX model. We first derive the Cardy-Verlinde formula under the assumption that the first law of thermodynamics is valid. This leads to an explicit expression of the total entropy associated with this type of universe. Assuming the validity of the Cardy entropy formula, we obtain expressions for the corresponding Bekenstein, Bekenstein-Hawking and Hubble entropies. We discuss the validity of the Cardy-Verlinde formula and possible extensions of the outlined procedure to other time-dependent models MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185229300093 L2 - BLACK-HOLES SO - Physical Review D 2003 ;68(2): 8979 UI - 7021 AU - Ochoa-Contreras D AU - Romero-Castro RM AU - Rivera-Sempertegui JO AU - Karageozian V AU - Karageozian H AU - Quiroz-Mercado H AD - APEC, Mexico City, DF, MexicoVitreoretinal Technol, Los Angeles, CA, USA TI - Anatomical and visual outcome of retinal detachment surgery in children with intravitreal carbamide previous a vitrectomy surgical procedure MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607000467 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U94-U94 8980 UI - 7573 AU - Ogura T AU - Ramirez-Ortiz J AU - rroyo-Villasenor ZM AU - Martinez SH AU - Palafox-Hernandez JP AU - De Alba LHG AU - Fernando Q AD - Univ Autonoma Guadalajara, Dept Chem, Guadalajara, Jalisco, MexicoUniv Autonoma Zacatecas, Unidad Acad Ciencias Quim, Mexico City 98600, DF, MexicoUniv Arizona, Dept Chem, Tucson, AZ 85721, USAOgura, T, Univ Autonoma Guadalajara, Dept Chem, Guadalajara, Jalisco, Mexico TI - Zacatecas (Mexico) companies extract Hg from surface soil contaminated by ancient mining industries AB - In Zacatecas, Mexico, four plants are operating to extract Ag, Au, and Hg using CaS2O3 solution from surface soil containing tailings from the amalgamation method used during 1550-1900. The metal ions extracted are cemented by scrap Cu wires. Hg is separated by evaporation from the cemented amalgam and Ag and Au are obtained from the residue. A part of the soil to be leached was separated and leached as in the industrial process. Only 121 ppm of Hg was freed from 168 ppm of extractable Hg. About a half of the remaining Hg in the soil evaporated during 18 months. This confirms that the Hg in the soil is metallic. Pb and As are also freed in the same process. It is estimated that 13 000-34 000 t of Hg had been discarded in the extraction of Ag MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0049-6979 UR - ISI:000184990800012 L2 - amalgam;gold;mercury pollution;mining industry;silver;Zacatecas;GOLD SO - Water Air and Soil Pollution 2003 ;148(1-4):167-177 8981 UI - 6837 AU - Ohba K AU - Ortega JCP AU - Tanie K AU - Tsuji M AU - Yamada S AD - Natl Iinst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058564, JapanEngn & Ind Dev Ctr CIDESI, Santiago de Queretaro 76130, MexicoPhotron Co, Shibuya Ku, Tokyo, JapanOhba, K, Natl Iinst Adv Ind Sci & Technol, 1-2 Namiki, Tsukuba, Ibaraki 3058564, Japan TI - Microscopic vision system with all-in-focus and depth images AB - In this paper, a high-speed digital processed microscopic observational system for telemicrooperation is proposed with a dynamic focusing system and a high-speed digital-processing system using the "depth from focus" criterion. In our previous work [10], we proposed a system that could simultaneously obtain an "all-in-focus image" as well as the "depth" of an object. In reality, in a microoperation, it is not easy to obtain good visibility of objects with a microscope focused at a shallow depth, especially in microsurgery and DNA studies, among other procedures. In this sense, the all-in-focus image, which keeps an in-focus texture over the entire object, is useful for observing microenvironments with the microscope. However, one drawback of the all-in-focus image is that there is no information about the objects' depth. It is also important to obtain a depth map and show the 3D microenvironments at any view angle in real time to actuate the microobjects. Our earlier system with a dynamic focusing lens and a smart sensor could obtain the all-in-focus image and the depth in 2 s. To realize real-time microoperation, a system that could process at least 30 frames per second (60 times faster than the previous system) would be required. This paper briefly reviews the depth from focus criterion to Simultaneously achieve the all-in-focus image and the reconstruction of 3D microenvironments. After discussing the problem inherent in our earlier system, a frame-rate system constructed with a high-speed video camera and FPGA (field programmable gate array) hardware is discussed. To adapt this system for use with the microscope, new criteria to solve the "ghost problem" in reconstructing the all-in-focus image are proposed. Finally, microobservation shows the validity of this system MH - Japan MH - Mexico|Queretaro PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence;Computer Science, Cybernetics;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0932-8092 UR - ISI:000186828600001 L2 - all-in-focus image;depth from focus;high-speed image-processing system;FPGA high-speed camera SO - Machine Vision and Applications 2003 ;15(2):55-62 8982 UI - 8791 AU - Ohlsson J AU - Villarreal G AU - Sjostrom A AU - Cavazos H AU - Abrahamsson M AU - Sjostrand J AD - Univ Gothenburg, Inst Clin Neurosci, Dept Ophthalmol, Gothenburg, SwedenUniv Autonoma Nuevo Leon, Dept Ophthalmol, Monterrey, MexicoOhlsson, J, SU Molndal, Dept Ophthalmol, SE-43180 Molndal, Sweden TI - Visual acuity, amblyopia, and ocular pathology in 12-to 13-year-old children in northern Mexico AB - Purpose: The aim of this study was to establish visual acuity (VA) and the prevalence of amblyopia and other ocular disorders in a population of 12- to 13-year-old children in Mexico who have not been vision screened. Methods. A total of 1,035 12- to 13-year-old children were examined in a field study. The examination included VA, stereopsis, cover testing, refractive retinoscopy, and examination of the red reflex and posterior pole. In cases with unexplained subnormal VA, visually evoked potential/visually evoked response was also performed. Results. A greater than or equal to20/20 in at least one eye was found in 93% of the subjects. Bilateral VA less than or equal to20/40 was found in 0.3% of cases. None of the subjects had bilateral VA <20/60. Amblyopia (less than or equal to20/40) was found in 26 subjects (2.5%). In 10 cases, the cause of subnormal VA was unexplained. Ocular albinism was found in 3 cases whereas strabismus was found in 24 subjects (2.3%). There were very few ocular opacities or posterior pole abnormalities. Conclusions:The visual status in the Mexican 12- to 13-year-old children tested was good. The prevalence of amblyopia was similar to that in other unscreened populations MH - Mexico|Nuevo Leon MH - Sweden PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 6 U4 - Ophthalmology;Pediatrics U5 - J;Article AV - English IS - 1091-8531 UR - ISI:000181952900009 L2 - REFRACTIVE ERROR; CYCLOPLEGIA; DISORDERS; SWEDEN SO - Journal of Aapos 2003 ;7(1):47-53 8983 UI - 8218 AU - Okasha S AD - Univ Nacl Autonoma Mexico, Inst Invest Filosof, Mexico City 04510, DF, MexicoUniv York, York YO10 5DD, N Yorkshire, EnglandOkasha, S, Univ Nacl Autonoma Mexico, Inst Invest Filosof, Ciudad Univ, Mexico City 04510, DF, Mexico TI - The concept of group heritability AB - This paper investigates the role of the concept of group heritability in group selection theory, in relation to the well-known distinction between 'type 1' and 'type 2' group selection ('GS1' and 'GS2'). I argue that group heritability is required for the operation of GS1 but not GS2, despite what a number of authors have claimed. I offer a numerical example of the evolution of altruism in a multi-group population which demonstrates that a group heritability coefficient of zero is perfectly compatible with the successful operation of group selection in the GS2 sense. A diagnosis of why group heritability has wrongly been regarded as necessary for GS2 is suggested MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - History & Philosophy Of Science U5 - J;Article AV - English IS - 0169-3867 UR - ISI:000183444200005 L2 - altruism;group selection;heritability;levels of selection;GROUP SELECTION; POPULATIONAL HERITABILITY; EVOLUTION; LEVEL; DIFFERENTIATION; SEX SO - Biology & Philosophy 2003 ;18(3):445-461 8984 UI - 8652 AU - Okasha S AD - Univ York, Dept Philosophy, York YO1 5DD, N Yorkshire, EnglandUniv Nacl Autonoma Mexico, Inst Invest Filosof, Mexico City 04510, DF, MexicoOkasha, S, Univ York, Dept Philosophy, York YO1 5DD, N Yorkshire, England TI - Fodor on cognition, modularity, and adaptationism AB - This paper critically examines Jerry Fodor's latest attacks on evolutionary psychology. Contra Leda Cosmides and John Tooby, Fodor argues (i) there is no reason to think that human cognition is a Darwinian adaptation in the first place, and (ii) there is no valid inference from adaptationism about the mind to massive modularity. However, Fodor maintains (iii) that there is a valid inference in the converse direction, from modularity to adaptationism, but (iv) that the language module is an exception to the validity of this inference. I explore Fodor's arguments for each of these claims, and the interrelations between them. I argue that Fodor is incorrect on point (i), correct on point (ii), partially correct on point (iii), and incorrect on point (iv). Overall, his critique fails to show that adopting a broadly Darwinian approach to cognition is intellectually indefensible MH - United Kingdom MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - History & Philosophy Of Science U5 - J;Article AV - English IS - 0031-8248 UR - ISI:000182331900007 SO - Philosophy of Science 2003 ;70(1):68-88 8985 UI - 8594 AU - Okio KYA AU - Diop L AU - Barry AH AU - Jouini T AU - Ortega SH AD - Univ Cheikh Anta Diop, Dept Chim, Fac Sci & Tech, Dakar, SenegalUniv Nouakchott, Dept Chim, Fac Sci & Tech, Nouakchott, MauritaniaFac Sci Tunis, Tunis 1060, TunisiaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoOkio, KYA, Univ Cheikh Anta Diop, Dept Chim, Fac Sci & Tech, Dakar, Senegal TI - Crystallographic report - Crystal and molecular structure of tetramethylammoniumdiisothiocyanato- triphenyltin(IV), [NMe4SnPh3(NCS)(2)] AB - The structure of NMe4SnPh3(NCS)(2) is molecular, without any significant intermolecular contacts in the lattice. The trigonal plane around the tin atom is defined by three carbon atoms from the phenyl groups and the axial positions occupied by the NCS groups. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mauritania MH - Mexico|Distrito Federal MH - Senegal MH - Tunisia PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0268-2605 UR - ISI:000182599100010 L2 - organotin(IV);X-ray diffraction;spectroscopic techniques SO - Applied Organometallic Chemistry 2003 ;17(5):317-318 8986 UI - 7290 AU - Olague C AU - Wenglas G AU - Castro P AD - Univ Autonoma Chihuahua, Chihuahua, MexicoUnidad Merida, IPN, CINVESTAV, Merida, VenezuelaOlague, C, Univ Autonoma Chihuahua, Chihuahua, Mexico TI - Influence of alkalis from different sources than cement in the evolution of alkali-silica reaction AB - A bibliographical revision of the existent literature allows showing symptoms of alkali-silica reaction (ASR) in highways, and the practical and economic method of uranyl acetate to confirm the presence of ASR. The existence of reaction in concrete pavements of Chihuahua City was verified by a visual observation of patterns cracks, examination of gel deposits and the presence of reactive materials. Considering that the cement used to construct this pavements with problems of ASR, was low alkalis cement, the research was devoted to study the influence of alkalis coming from different sources than cement in the evolution of reaction such as: a) aggregates: gravel and sand, b) mix water, c) additives and d) minerals additions The initial classification of cements like high and low alkalis concerned to ASR must be revised for accept the fact that there is not a unique maximum limit alkalis of cement under which the expansible reactivity cannot occur MH - Mexico|Chihuahua MH - Venezuela PB - MADRID: INSTITUTO CIENCIAS CONSTRUCCION EDUARDO TORROJA RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0465-2746 UR - ISI:000185461900020 L2 - concrete;deterioration in pavements;total alkalis;silica;aggregates SO - Materiales de Construccion 2003 ;53(271-72):189-198 8987 UI - 8444 AU - Oleschko K AU - Korvin G AU - Figueroa B AU - Vuelvas MA AU - Balankin AS AU - Flores L AU - Carreon D AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoKing Fahd Univ Petr & Minerals, Dhahran 31261, Saudi ArabiaColegio Postgrad, Montecillo 56230, Estado Mexico, MexicoINIFAP, Guanajuato 38001, MexicoInst Politecn Nacl, SEPI, ESIME, Edificio 5, Mexico City 07738, DF, MexicoOleschko, K, Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ,Apartado Postal 70-296, Mexico City 04510, DF, Mexico TI - Fractal radar scattering from soil AB - A general technique is developed to retrieve the fractal dimension of self-similar soils through microwave (radar) scattering. The technique is based on a mathematical model relating the fractal dimensions of the georadargram to that of the scattering structure. Clear and different fractal signatures have been observed over four geosystems (soils and sediments) compared in this work MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato MH - Saudi Arabia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000182824400030 L2 - GROUND-PENETRATING RADAR; CRUSTAL MAGNETIZATION; DELESSE PRINCIPLE; WAVE SCATTERING; WATER CONTENT; BEHAVIOR; SYSTEMS; SUSCEPTIBILITY; SIMULATION; DIMENSIONS SO - Physical Review e 2003 ;67(4): 8988 UI - 8738 AU - Olguin D AU - Rodriguez JA AU - Baquero R AD - CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Colombia, Dept Fis, Bogota, ColombiaOlguin, D, CINVESTAV, Dept Fis, Apartado Postal 14-470, Mexico City 07000, DF, Mexico TI - Frontier induced semi-infinite-medium (FISIM) states at semiconductor surfaces and interfaces AB - In a previous work we have discussed the valence band electronic structure of a (001) oriented surface (semi-infinite medium) of some II-VI wide band gap zinc-blende semiconductor compounds. For these systems, we have found three characteristic surface resonances., besides the known bulk bands (hh, lh and spin-orbit bands). Two of these resonances correspond to the anion terminated surface and the third one to the cation terminated one. We have shown, specifically, that three non dispersive (001)-surface-induced bulk states, in the Gamma - X direction of the 2D Brillouin zone, do exist and are characteristic of these systems. The existence of these states has been confirmed, independently, by two experimental groups and further evidence of our predictions has been more recently found. In order to continue with the description of these states, in this work, we briefly review the main characteristics of the electronic structure of the (001)-surfaces to up-date their analysis and we present new results concerning the existence of the same kind of states in Cu-based calcopyrites and at interfaces. This shows that, in general, the non-dispersive states occur in several, if not all, crystal surfaces, and, on general grounds, as the consequence of introducing to an infinite medium a frontier of any kind (not only with the vacuum). For that reason we propose here, to name them, more appropriately as Frontier Induced Semi-Infinite Medium (FISIM) states. We present in this paper two new interesting cases where the non-dispersive states appear. First, the (112)-oriented CuInSe2 calcopyrite surface and, secondly, the interface CdTe/CdSexTe1-x (x = 0.15) which, essentially, does not introduce the additional effects due to lattice mismatch so that the FISIM states are clearly seen. We have calculated them for a broader range of x and for other II-VI and III-V semiconductor compounds to check that the result is general. The surface and the interface that we present here, allow us to discuss the characteristics of these newly found states, in a more, general way MH - Colombia MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000182209600013 L2 - ELECTRONIC-STRUCTURE; BAND-STRUCTURE; DEFORMATION POTENTIALS; SUPERLATTICES; ZNSE(100); CDTE(100); DIAMOND; ALLOYS; CDTE; HGTE SO - European Physical Journal B 2003 ;32(1):119-126 8989 UI - 9146 AU - Olguin D AU - Cantarero A AU - Ulrich C AU - Syassen K AD - Univ Valencia, Inst Sci Mat, Valencia 46071, SpainMax Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyIPN, CINVESTAV, Dept Fis, Mexico City, DF, MexicoCantarero, A, Univ Valencia, Inst Sci Mat, POB 22085, Valencia 46071, Spain TI - Effect of pressure on structural properties and energy band gaps of gamma-InSe AB - We have investigated theoretically the effect of hydrostatic pressure on interatomic bond lengths and energy band gaps of gamma-InSe. Total energy calculations were performed using the linear augmented plane wave (LAPW) method, taking into account scalar relativistic corrections as well as spin-orbit coupling. Internal structural parameters were optimized for different pressures by adopting as input the unit cell parameters known from experiment. Our theoretical results for the nearest-neighbor In-Se bond length are in excellent agreement with a recent experimental determination from high-pressure EXAFS measurements. The covalent In-In bond is found to be more compressible than the partially ionic In-Se bond. We also present the calculated pressure dependence of band gaps and compare to recent high-pressure experimental studies of optical and transport properties. A large negative pressure coefficient is obtained for the indirect Z-A gap. This leads to a crossover from a direct to an indirect fundamental gap within the stability range of the gamma-polytype of InSe, in qualitative agreement with recent experiments MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000181009000045 L2 - LAYERED COMPOUNDS GAS; ELECTRONIC-STRUCTURE; ELASTIC-CONSTANTS; INDIUM SELENIDE; DEPENDENCE; ABSORPTION; GALLIUM SO - Physica Status Solidi B-Basic Research 2003 ;235(2):456-463 8990 UI - 9035 AU - Olguin L AU - Jara LJ AU - Becerra M AU - Ariza R AU - Espinoza L AU - Wilson W AU - Barile-Fabris L AD - Hosp Especialidades Ctr Med La Raza, Ctr Med Raza, IMSS, Dept Rheumatol, Mexico City, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Raza, IMSS, Dept Pathol, Mexico City, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Raza, IMSS, Dept Internal Med, Mexico City, DF, MexicoLouisiana State Univ, Ctr Hlth Sci, Rheumatol Sect, New Orleans, LA, USAHosp Especialidads, CMN, IMSS, Clin Epidemiol Res Unit, Mexico City 10200, DF, MexicoBarile-Fabris, L, Hosp Especialidads, CMN, SXXI, IMSS,Clin Epidemiol Res Unit, Avienda San Bernabe 712 Bis Casa 3,San Jeronimo L, Mexico City 10200, DF, Mexico TI - Neurological involvement as a poor prognostic factor in catastrophic antiphospholipid syndrome: autopsy findings in 12 cases AB - CAPS is an uncommon disease, characterized by clinical evidence of multiple organ involvement and histopathological evidence of multiple vessel occlusions, in patients with either primary or secondary antiphospholipid syndrome. The present series describes the clinical manifestations and autopsy findings of 12 patients with CAPS. Neurological involvement was considered the main cause of death in all of them. CNS pathology revealed thrombotic microangiopathy as well as small and large vessel occlusions in several brain areas. Neurological involvement in CAPS is strongly associated with thrombotic microangiopathy and should be considered a potential cause of death in these patients MH - Mexico|Distrito Federal MH - USA PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Article AV - English IS - 0961-2033 UR - ISI:000181308200003 L2 - autopsy findings in catastrophic antiphospholipid syndrome;catastrophic antiphospholipid syndrome;neurological involvement in antiphospholipid syndrome;CLASSIFICATION; PATHOGENESIS; ANTIBODIES; CRITERIA SO - Lupus 2003 ;12(2):93-98 8991 UI - 7351 AU - Olivares JC AU - Liu Y AU - Canedo J AU - Escarela-Perez R AU - Driesen J AU - Moreno P AD - Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061, USACINVESTAV, Jalisco 45090, MexicoUniv Autonoma Metropolitana Azcapotzalco, Mexico City, DF, MexicoKatholieke Univ Leuven, Res Grp Elect Energy, ESAT ELEN Kasteelpk Arenber, B-3001 Louvain, BelgiumOlivares, JC, Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA TI - Closure on "Reducing losses in distribution transformers" MH - Belgium MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Editorial Material AV - English IS - 0885-8977 UR - ISI:000185659500080 SO - Ieee Transactions on Power Delivery 2003 ;18(4):1594-1596 8992 UI - 8124 AU - Olivares JC AU - Liu YL AU - Canedo JM AU - Escarela-Perez R AU - Driesen J AU - Moreno P AD - Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061, USAKatholieke Univ Leuven, Res Grp Elect Energy, ESAT, ELEN, B-3001 Heverlee, BelgiumUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoOlivares, JC, Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA TI - Reducing losses in distribution transformers AB - This paper examines three methods of reducing distribution transformer losses. The first method analyzes the effects of using aluminum electromagnetic shields in a distribution transformer. The goal of placing electromagnetic shields in the distribution-transformer tank walls is to reduce the stray losses. A 500-kVA shell-type transformer was used in the experiments. The overall results presented indicate that stray losses can be considerably reduced when electromagnetic shielding is applied in the transformer tank. In the experiment, the tank walls were lined with aluminum foil. The possibility of reducing the dielectric losses was shown through experiments in the second method. And the third method of this Work analyzes the behavior of wound-cores losses in distribution transformers, as a function of joint configuration design parameters. The joint configuration used in this paper is called step-lap joint MH - Belgium MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000183823000023 L2 - dielectric losses;loss measurements;shielding;transformer;transformer cores;3-PHASE TRANSFORMER; POWER TRANSFORMER; FLUX DISTRIBUTION; CORES; PERFORMANCE; JOINTS SO - Ieee Transactions on Power Delivery 2003 ;18(3):821-826 8993 UI - 9442 AU - Olivera L AU - Canul RR AU - Pereira-Pacheco F AU - Cockburn J AU - Soldani F AU - McKenzie NH AU - Duncan M AU - Olvera-Novoa MA AU - Grant G AD - Rowett Res Inst, Bucksburn AB21 9SB, Aberdeen, ScotlandCINVESTAV, IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida, Yucatan, MexicoUniv Autonoma Yucatan, Fac Ingn Quim, Yucatan, MexicoGrant, G, Rowett Res Inst, Greenburn Rd, Bucksburn AB21 9SB, Aberdeen, Scotland TI - Nutritional and physiological responses of young growing rats to diets containing raw cowpea seed meal, protein isolate (globulins), or starch AB - The nutritional and physiological effects of raw cowpea (Vigna unguiculata (L) Walp.) seed meal, protein isolate (globulins), or starch on the metabolism of young growing rats have been evaluated in 14-day trials. Wet and dry weight gain, feed conversion efficiency, and lipid and protein accretion were significantly reduced as a result of inclusion of seed meal, globulins, or starch in the diet, with growth retardation being most marked with the seed meal. The proportional weights of the small intestine and pancreas were increased by meal diets, and serum cholesterol levels were slightly reduced. The globulins and raw starch also increased relative small intestine weights but had no effect on the pancreas or serum constituents. The effects of cowpeas on rats appeared to be due primarily to the combined actions of globulins; resistant starches, protease inhibitors, and possibly fiber and non-starch polysaccharides on intestinal and systemic metabolism MH - Mexico|Yucatan MH - United Kingdom PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000180194500052 L2 - cowpeas;globulins;starch;nutritional properties;intestine;pancreas;rat;BEANS PHASEOLUS-VULGARIS; VIGNA-UNGUICULATA; SOYA BEANS; LUPINUS-ANGUSTIFOLIUS; PROXIMATE COMPOSITION; LEGUME PROTEINS; GLYCINE-MAX; PHYTIC ACID; DIGESTIBILITY; INHIBITORS SO - Journal of Agricultural and Food Chemistry 2003 ;51(1):319-325 8994 UI - 7840 AU - Olmi L AU - Cesaroni R AU - Hofner P AU - Kurtz S AU - Churchwell E AU - Walmsley CM AD - Univ Puerto Rico, Dept Phys, San Juan, PR 00931, USACNR, Sez Firenze, Ist Radio Astron, I-50125 Florence, ItalyINAF, Osservatorio Astrofis Arcetri, I-50125 Florence, ItalyCornell Univ, Arecibo Observ, Arecibo, PR 00612, USAUniv Wisconsin, Washburn Observ, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, MexicoOlmi, L, Univ Puerto Rico, Dept Phys, POB 23343 Univ Stn, San Juan, PR 00931 USA TI - High resolution observations of the hot core in G29.96-0.02 AB - We present high angular resolution observations obtained with the Owens Valley and the IRAM Plateau de Bure millimeter-wave interferometers toward the hot core in G29.96-0.02. We observed the ground state CH3CN(6-5), (CH3CN)-C-13(6-5), vibrationally excited (upsilon(8) = 1) CH3CN(6-5), and the (CO)-O-18(1-0) rotational transitions, as well as the 2.7 mm continuum emission. Our continuum maps show evidence of a compact source barely resolved whose diameter we estimate to be about 0.06 pc and whose emission mechanism is dominated by thermal emission from warm dust. Both the ground state and the upsilon8 = 1 methyl cyanide lines, as well as other serendipituosly detected molecular transitions, arise from a compact source at the same position as the 2.7 mm continuum emission. The (CO)-O-18 observations sample the structure and kinematics of the molecular surroundings of the hot core and from the (CO)-O-18 data we estimate a gas mass of about 1.1 x 10(3) M. in a region with a diameter of 0.32 pc, corresponding to an average number density of about 10(6) cm(-3). Our data show evidence of both a temperature and density gradient in the hot core and its molecular surroundings. The density gradient, in particular, is consistent with the infalling scenario suggested by the presence of an East-West oriented velocity gradient, which is however of opposite sign in CH3CN and (CO)-O-18. We tentatively interpret the (CO)-O-18 velocity gradient as associated with infall, whereas the CH3CN gradient, consistent with that measured in NH3 by Cesaroni et al. (1998), is likely to trace a massive rotating disk MH - USA MH - Italy MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000184435000024 L2 - stars : formation;radio lines : ISM;ISM : individual objects : G29.96-0.02;ISM : molecules;ULTRACOMPACT HII-REGIONS; H-II REGIONS; MOLECULAR CLOUDS; PHYSICAL-PROPERTIES; CH3CN OBSERVATIONS; STAR-FORMATION; AMMONIA; CLUMPS; DENSE; G31.41+0.31 SO - Astronomy & Astrophysics 2003 ;407(1):225-235 8995 UI - 7256 AU - Olmos-Soto J AU - Contreras-Flores R AD - Biotecnol Marina, San Diego, CA 92143, USACtr Invest Cient & Educ Super Ensenada, Mol Microbiol Lab, Marine Biotechnol Dept, Mexico City, DF, MexicoOlmos-Soto, J, Biotecnol Marina, POB 434844, San Diego, CA 92143, USA TI - Genetic system constructed to overproduce and secrete proinsulin in Bacillus subtilis AB - The first amino acid residue from a proinsulin gene was fused in frame with the last amino acid residue of the aprE signal peptide sequence from Bacillus subtilis, using an overlapping PCR methodology. For expression of the fused DNA the aprE regulatory region (aprERR) was used. A six-protease-deficient strain of B. subtilis with the hpr2 and degU32 mutations was constructed for overproduction of the recombinant protein. The production of proinsulin was carried out in a mineral medium which facilitated the purification of proinsulin. Samples were taken during growth and analyzed by RIA and Western blot. Proinsulin was overproduced (1 mg ml(-1)) and 90% was secreted into the culture medium I h after stationary phase began MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000185844700009 L2 - ESCHERICHIA-COLI; PROTEIN SECRETION; EXPRESSION; SEQUENCE; INSULIN SO - Applied Microbiology and Biotechnology 2003 ;62(4):369-373 8996 UI - 8407 AU - Ologoudou K AU - Ramakrishnan U AU - Neufeld L AU - Gonzalez-Cossio T AU - Rivera J AD - Emory Univ, Grad Div Biol & Biomed Sci, Atlanta, GA 30322, USAEmory Univ, Dept Int Hlth, Rollins Sch Publ Hlth, Atlanta, GA 30322, USANatl Inst Publ Hlth, Dept Int Hlth, Cuernavaca, Morelos, Mexico TI - Effect of multivitamin mineral supplements on infant iron status: a controlled trial in Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796901643 SO - Faseb Journal 2003 ;17(5):A1101-A1101 8997 UI - 7594 AU - Oloriz F AU - Villasenor AB AU - Gonzalez-Arreola C AD - Univ Granada, Fac Ciencias, Dept Estratig & Paleontol, Granada 18002, SpainUniv Nacl Autonoma Mexico, Dept Palaeontol, Inst Geol, Mexico City 04510, DF, MexicoOloriz, F, Univ Granada, Fac Ciencias, Dept Estratig & Paleontol, Granada 18002, Spain TI - Major lithostratigraphic units in land-outcrops of north-central Mexico and the subsurface along the northern rim of Gulf of Mexico Basin (Upper Jurassic-lowermost Cretaceous): a proposal for correlation of tectono-eustatic sequences AB - The stratigraphic and geodynamic interpretation of Upper Jurassic lithostratigraphic units is revised in north-central Mexico and the northern rim of the Gulf of Mexico Basin through updated ammonite and calpionellid biochronostratigraphy. Significant events in the geodynamic evolution in these areas are evaluated and interpreted in terms of tectono-eustatic sequences (TES) of third and second orders. 3rd-TES-I and 2nd-TES-II/III in Mexico and 3rd-TES-I, 3rd-TES-II and 3rd-TES-III at the northern rim of the Gulf of Mexico show the main traits of the Upper Jurassic Supercycle in these regions, allowing the identification of a combined 'Atlantic-Tethyan cachet' in the course of structuring/configuration of the Gulf of Mexico Basin during the Late Jurassic. The easy identification of 3rd-TES-I in north-central Mexico and at the northern rim of the Gulf of Mexico Basin shows no significant difference in geodynamic history during the Oxfordian, which contrasts with the increasing difference from the Kimmeridgian to the Early-Middle Berriasian. Shared trends in stratigraphic architecture with the European margin of the North Atlantic Basin, as well as with epicontinental shelves surrounding Iberia and other Tethyan areas, are interpreted to show phases of the geodynamic evolution in the central North Atlantic Basin, traces of which are recognizable also in western Africa. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000184995000005 L2 - stratigraphy;biostratigraphy;correlation;tectono-eustasy;Upper Jurassic;lowermost crctaceous;North-Central Mexico;Northern gulf rim;SEA DRILLING PROJECT; CONTINENTAL-MARGIN; PALEOGEOGRAPHIC EVOLUTION; ATLANTIC; STRATIGRAPHY; MOROCCO; SITE-534; LEG-79; TETHYS; RECONSTRUCTIONS SO - Journal of South American Earth Sciences 2003 ;16(3):119-142 8998 UI - 6992 AU - Olson ME AU - Gaskin JF AU - Ghahremani-nejad F AD - Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoUSDA ARS, No Plains Agr Res Lab, Sidney, MT 59270, USAUniv Tarbiat Moaallem, Tehran 15614, IranOlson, ME, Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Tercer Circuito S-N,Cuidad Univ,Copilco,Coyoacan, Mexico City 04510, DF, Mexico TI - Stem anatomy is congruent with molecular phylogenies placing Hypericopsis persica in Frankenia (Frankeniaceae): comments on vasicentric tracheids AB - Stem and root anatomy of Hypericopsis persica is evaluated in light of molecular data reconstructing Hypericopsis within a clade of Asian Frankenia. No anatomical information contradicts the idea that Hypericopsis should be subsumed within Frankenia. Anatomy in the two genera is comparable, taking into account the unusual habit of Hypericopsis, which consists of slender, short-lived shoots from a long-lived caudex, whereas most species of Frankenia are small shrubs with long-lived shoots. Wood of the slender stems of Hypericopsis is similar to twig wood of the related Frankenia hirsuta in qualitative and quantitative features but differs from mature wood of other species of Frankenia described in previous studies in having smaller cells and little storying. Wood of Hypericopsis is rayless and is made up mostly of libriform fibers and vessel elements associated with vasicentric tracheids. Axial parenchyma is occasional at the margins of growth rings. We briefly evaluate wood characters in the context of Caryophyllales s.l. and suggest characters that may be synapomorphies of clades within this group, e.g., minute lateral wall pits apparently characterize the clade comprising Plumbaginaceae, Polygonaceae, Frankeniaceae, and Tamaricaceae. That vasicentric tracheids elongate considerably beyond the lengths of the vessel elements with which they are associated is cited as a distinct ontogenetic difference between these cell types. Likewise, numerous vessel elements comparable in diameter to vasicentric tracheids were observed. These observations are offered as reasons to reject the concept of vasicentric tracheids as simply vessel elements that are too narrow for the formation of perforation plates MH - Iran MH - Mexico|Distrito Federal MH - USA PB - VIENNA: INT ASSOC PLANT TAXONOMY RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0040-0262 UR - ISI:000186452900010 L2 - Caryophyllales;central Asia;Frankeniaceae;systematics;vasicentric tracheids;wood anatomy;WOOD ANATOMY; CARYOPHYLLALES; TRENDS SO - Taxon 2003 ;52(3):525-532 8999 UI - 9329 AU - Olvera O AU - Arceo C AU - Zimmering S AD - Brown Univ, Program Biol, Providence, RI 02912, USACtr Nucl Mexico, Dept Biol, Salazar, Edo De Mexico, MexicoZimmering, S, Brown Univ, Program Biol, Box G, Providence, RI 02912, USA TI - The effect of treating Drosophila females with chlorophyllin on the yield of dominant lethals recovered from irradiated sperm AB - Evidence is presented that treating the Drosophila female with chlorophyllin (CHLN) has a marked effect on the yield of dominant lethals induced by the;irradiation of sperm. The yield is significantly greater in the embryonic period (between the egg and the first instar) and is significantly reduced in postembryonic stages compared with a sucrose control. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000180602800020 L2 - Drosophila;chlorophyllin;dominant lethals SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2003 ;534(1-2):201-202 9000 UI - 8885 AU - Ondarza RN AU - Iturbe A AU - Hernandez E AU - Hurtado G AD - Natl Publ Hlth Inst, Ctr Res Infect Dis, Cuernavaca 62508, Morelos, MexicoNatl Autonomous Univ Mexico, Dept Biochem, Fac Med, Mexico City 04510, DF, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biotechnol & Biomed, La Jolla, CA 92093, USAOndarza, RN, Olivar de Los Padres 941, Mexico City 01780, DF, Mexico TI - Low-molecular-mass thiol compounds from a free-living highly pathogenic amoeba, Naegleria fowleri AB - Acid extracts labelled with the fluorescent reagent monobromobimane and separated by HPLC have enabled the detection of low-molecular-mass thiol compounds in Naegleria fowleri for the first time. The amounts detected are expressed in nmol/1 x 10(6) trophozoites cultivated at various stages of growth in the appropriate culture medium. N. fowleri is a highly pathogenic free-living amoeba, in which we found important thiol compounds, some of them in their reduced and oxidized forms. Unlike cysteine and glutathione, a number of these are not represented in normal human lymphocytes. Some of these thiol compounds from Naegleria must have their respective disulphide reductases, although the presence of thioldisulphide exchange reactions must be considered. Ovothiol A, with antioxidant properties, is an example of a compound that is kept reduced by trypanothione in trypanosomatids, although no disulphide reductase for ovothiol A has yet been discovered. In our case we were unable to detect this biothiol in Naegleria. The presence of thiol compounds that seem to be particular to this pathogen and which are not present in human lymphocytes opens the possibility of searching for disulphide-reducing enzymes that can serve as drug targets MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LONDON: PORTLAND PRESS RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0885-4513 UR - ISI:000181820500013 L2 - cysteine;glutathione;Naegleria thiol compound;ovothiol;potential drug target;trypanothione;ENTAMOEBA-HISTOLYTICA; TRYPANOTHIONE METABOLISM; GLUTATHIONE METABOLISM; REDUCTASE; TRYPANOSOMATIDS; EXPRESSION; EUKARYOTE; OVOTHIOL SO - Biotechnology and Applied Biochemistry 2003 ;37():195-204 9001 UI - 8044 AU - Ongley LK AU - Armienta A AU - Mango H AD - Androscoggin Valley Environm Ctr, Monmouth, ME 04259, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCastleton State Coll, Dept Nat Sci, Castleton, VT 05735, USAOngley, LK, Androscoggin Valley Environm Ctr, 221 Pease Hill Rd, Monmouth, ME 04259 USA TI - Concentrations of heavy metals in soil, Zimapan, Mexico AB - Pb-Zn-Ag mining and ore processing have occurred continuously in Zimapan, Mexico since at least 1632 and possibly since 1576 [1, 2]. This has resulted in the development of significant slag and tailings piles. Dissolution of ore and tailings has resulted in arsenic contamination of much of the water in the valley raising the possibility of arsenicosis of the residents [3, 4, 5]. INAA and ICP analysis of more than 175 sediment, soil and tailings samples demonstrate significant metal and arsenic contamination of these unconsolidated materials. As, Cu, Pb, and Zn were among the measured elements. Metal concentrations in soils and sediments were highest within 1000 m of tailings or slag piles. Some of the highest soil metal concentrations were measured in a developing soil on top of a slag pile: As - 14 700 mg/kg, Cu - 8 638 mg/kg, Pb - 41 444 mg/kg, and Zn 16 976 mg/kg. Soils more than 4 000 m from the tailings and slag generally had less than 40 mg As/kg with Cu < 30 mg/kg, Pb < 64 mg/kg, and Zn < 200 mg/kg. Some rocks from the area also show elevated metal concentrations. For example, the As concentrations in dikes and ores from Zimapan averaged 1242 and 30 800 mg/kg respectively. Average shale As concentrations (74 mg/kg) match published data for shales that indicate "normal" As concentrations range from 3 - 490 mg(kg are found world-wide [6]. Some of the soil contamination is natural, the result of the geologic processes responsible for the Pb-Zn ores. However, particularly near the tailings and slag piles, the soils are also contaminated by anthropogenic means: by dry particulate deposition from smelters, by windblown tailings, and possibly by ore and rock dust from the ore transport trucks MH - USA MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1155-4339 UR - ISI:000183782500061 L2 - GROUNDWATER SO - Journal de Physique Iv 2003 ;107():983-986 9002 UI - 7901 AU - onso-Perez F AU - Ruiz-Luna A AU - Turner J AU - Berlanga-Robles CA AU - Mitchelson-Jacob G AD - AC Unidad Mazatlan, CIAD, Mazatlan 82000, Sin, MexicoCSIC, Inst Invest Marinas, Vigo 36208, SpainUniv Wales, Sch Ocean Sci, Bangor, Gwynedd, WalesRuiz-Luna, A, AC Unidad Mazatlan, CIAD, POB 711, Mazatlan 82000, Sin, Mexico TI - Land cover changes and impact of shrimp aquaculture on the landscape in the Ceuta coastal lagoon system, Sinaloa, Mexico AB - Changes in natural cover and land use within the Ceuta coastal lagoon system, Mexico, were assessed using multitemporal analysis of Landsat imagery. Global trends of change and the effects of the recent establishment of the shrimp aquaculture industry on the natural cover were examined. On two images from 1984 and 1999, nine information categories (secondary succession, mangrove, irrigated and temporary agriculture, dry forest, bare substratum, lagoons, shrimp ponds, and villages) were evaluated after supervised classification and digitisation processes. The accuracy of the 1999 classification was measured by means of an error matrix that output an overall accuracy of 85%, and values of 0.8 for the Kappa and Tau coefficients. The classification had a moderate to high accuracy, and showed that agriculture is the main influence on the system, covering 55% of the study area, principally replacing dry forest and secondary succession. The development of shrimp aquaculture is causing a new pressure on this environment, and it has changed the coastal landscape covering 3190 ha in less than 15 years, mainly replacing bare soil and salt marsh. Estimations for mangrove cover in the area indicated an annual deforestation rate of around 0.3%, but this rate was not directly related with shrimp-farming growth. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Sinaloa MH - Spain MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000184145500006 L2 - UNITED-STATES; PATTERNS; FORESTS; CLASSIFICATION; MANAGEMENT; IMAGES SO - Ocean & Coastal Management 2003 ;46(6-7):583-600 9003 UI - 6420 AU - Orantes JC AU - Gonzalez-Martinez S AD - Univ Montpellier 2, Lab Genie Procedes, F-34095 Montpellier 05, FranceNatl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoOrantes, JC, Univ Montpellier 2, Lab Genie Procedes, Pl E Bataillon, F-34095 Montpellier 05, France TI - A new low-cost biofilm carrier for the treatment of municipal wastewater in a moving bed reactor AB - The Moving Bed Biofilm Reactor has proven to be an efficient system in wastewater treatment and has become a viable solution for small treatment plants. The main objective of this research was to analyse the performance of a moving bed reactor using low-cost local material when fed with municipal wastewater. A pilot reactor with a total volume of 900 litres was built and it was fed continuously with municipal wastewater. The operation of the system was adjusted to six different organic loading rates. The biofilm carrier was polyethylene tubing with internal diameter of 1.1 cm, cut into pieces of 1.2 cm. The tested material offered a specific surface area of 590 m(2)/m(3). Air was provided with a fine-bubble diffuser. The main results show that the reactor performance was stable and predictable. The COD removal confidently behaves according to a general hyperbolic kinetic equation. The maximal total COD removal attained was 81%. Nitrification was observed only for organic loads with values under 5.7 gCOD/m(2).d. Good adherence of the microorganisms was observed for the applied organic loading rates. After several months of operation, the material showed no signs of abrasion or deformation. The sludge production behaved linearly with the organic load reaching 979 gTSS/d with the highest organic load of 35.7 gCOD/m(2).d. The amount of microorganisms attached to the carrier increased with the organic load tending to an asymptotical maximal value of 17.3 g/m(2) (as dry solids). Mean cellular retention times from 2.0 to 23.1 days were determined MH - France MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000188094900033 L2 - aerobic treatment;biofilm;moving bed;wastewater;TREATMENT PLANTS SO - Water Science and Technology 2003 ;48(11-12):243-250 9004 UI - 8040 AU - Ordonez-Regil E AU - Drot R AU - Simoni E AD - Univ Paris 11, Inst Phys Nucl, F-91406 Orsay, FranceDrot, R, Inst Nacl Invest Nucl, Dept Quim, Apdo Postal 18-1027, Mexico City 11802, DF, Mexico TI - Surface complexation modeling of uranium(VI) sorbed onto lanthanum monophosphate AB - Sorption/desorption are basic processes in the field of contaminant transport. In order to develop mechanistically accurate thermodynamic sorption models, the simulation of retention data has to take into account molecular scale informations provided by structural investigations. In this way, the uranyl sorption constants onto lanthanum monophosphate (LaPO4) were determined on the basis of a previously published structural investigation. The surface complexation modeling of U(VI) retention onto LaPO4 has been performed using the constant capacitance model included in the FITEQLv3.2 program. The electrical behavior of the solid surface was investigated using electrophoretic measurements and potentiometric titration experiments. The point of zero charge was found to be 3.5 and surface complexation modeling has made it possible to calculate the surface acidity constants. The fitting procedure was done with respect to the spectroscopic results, which have shown that LaPO4 presents two kinds of reactive surface sites (lanthanum atoms and phosphate groups). The uranyl sorption edges were determined for two surface coverages: 40 and 20% of the surface sites that are occupied, assuming complete sorption. The modeling of these experimental data was realized by considering two uranyl species ("free" uranyl and uranyl nitrate complex) sorbed only onto phosphate surface groups according to the previously published structural investigation. The obtained sorption constants present similar values for both surface complexes and make it possible to fit both sorption edges: log K-U = 9.4 for equivalent toP(OH)(2) + UO22+ <----> equivalent toP(OH)(2)UO22+ and log K-UN = 9.7 for equivalent toP(OH)(2) + UO2NO3+ <----> equivalent toP(OH)(2)UO2NO3+. (C) 2003 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000183927000007 L2 - sorption;surface complexation;CCM;lanthanum phosphate;uranyl ion;electrophoretic measurements;potentiometric titrations;ZERO CHARGE; SOLUTION INTERFACE; PHOSPHATE-COMPOUNDS; CRYSTAL-CHEMISTRY; AQUEOUS-SOLUTIONS; SORPTION; ADSORPTION; POINT; HYDROXYAPATITE; IONS SO - Journal of Colloid and Interface Science 2003 ;263(2):391-399 9005 UI - 8982 AU - Orea P AU - Duda Y AU - Alejandre J AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoNAS Ukraine, Inst Condensed Matter Phys, Lvov 11, UkraineUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoOrea, P, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Apdo Postal 14-805, Mexico City 07730, DF, Mexico TI - Surface tension of a square well fluid AB - We performed Monte Carlo simulations in the canonical ensemble on the liquid-vapor interface of a square well fluid with interaction range of lambda=1.5sigma. The system contains a liquid slab surrounded by vapor. The surface tension is calculated during simulations by using an original procedure that allows the calculation of the pressure tensor components. The surface tension decreases monotonically with temperature. Coexisting densities and pressure along the liquid-vapor coexistence line have also been obtained and good agreement is found with results calculated from bulk simulations. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 22 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000181442100042 L2 - MONTE-CARLO SIMULATION; LENNARD-JONES FLUIDS; MOLECULAR-DYNAMICS; CRITICAL-BEHAVIOR; VARIABLE WIDTH; INTERFACE; ENSEMBLE; EQUILIBRIA; EQUATION; STATE SO - Journal of Chemical Physics 2003 ;118(12):5635-5639 9006 UI - 9151 AU - Oreja JAG AU - Salinas JIS AD - Univ Basque Country, Dept Zool, Bilbao 48080, SpainUniv Basque Country, ACD, Bilbao 48080, SpainUniv Amer, Depto Quim & Biol, Puebla 72820, MexicoSalinas, JIS, Univ Basque Country, Dept Zool, POB 644, Bilbao 48080, Spain TI - Recovery simulations of grossly polluted sediments in the Bilbao Estuary AB - The Bilbao Estuary is one of the most contaminated estuaries on the north coast of Spain, and vast efforts have been made to abate pollution there. In fact, the local water authority has forecast a biological recovery of the native fauna after a substantial increase in dissolved oxygen to normoxic levels. In order to assess this prediction by evaluating the extent of natural regeneration of these polluted sediments, two long-term bioassays (t = 90 d) were performed. In both of them, lethal (differences in survival) and sublethal (differences in length and weight growth) effects were measured by using juvenile individuals of the autochthonous clam, Scrobicularia plana (Da Costa, 1778). The sediments tested differed in pollution levels, as measured by a set of indicators including PAHs, PCBs, heavy metals, volatile organic matter and coprostanol. All sediments were finally exposed to normoxic conditions in situ in the Bilbao Estuary (DO similar to 6.3 mg l(-1)). In the first experiment, concerning moderately polluted sediments from the Bilbao Estuary and reference sediments from the "pristine" Plentzia Estuary, no significant differences (P > 0.05) were found regarding animal survival (similar to94.5%) or growth in length or weight between the sediments tested. In the second experiment, also involving grossly polluted sediments (GPS) from the Bilbao Estuary, survival (24.5%) was statistically lower (P < 0.05) than in the other sediments (similar to93%). No significant differences were found in growth (length, weight) between animals exposed to moderately polluted or reference sediments. We interpret this dramatic difference in survival as the lethal effect on the animals tested of the GPS of the Bilbao Estuary, indicating a situation where biological recovery is not possible due to the adverse consequences of contaminants sorbed into sediments. The extensive use of this inexpensive bioassay could help to distinguish sediments in which homeostatic recovery is possible from grossly polluted "hot spots", which need costly remedial actions. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Puebla MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000181014600017 L2 - Bilbao Estuary;bivalves Scrobicularia plana;sediment;recovery;pollution;NEREIS-DIVERSICOLOR; SPAIN SO - Marine Pollution Bulletin 2003 ;46(1):42-48 9007 UI - 6138 AU - Orgeira MJ AU - Walther AM AU - Tofalo RO AU - Vasquez C AU - Berquo T AU - Dobois CF AU - Bohnel H AD - Univ Buenos Aires, FCEN, CONICET, Dept Cs Geol Pabellon 2,Cdad Univ Buenos Aires, Buenos Aires, DF, ArgentinaConsejo Nacl Invest Cient & Tecn, Buenos Aires, DF, ArgentinaUniv Buenos Aires, CBC, Buenos Aires, DF, ArgentinaUniv Sao Paulo, IF, Sao Paulo, BrazilUNICIT, Inst Geofis, Queretaro, MexicoOrgeira, MJ, Univ Buenos Aires, FCEN, CONICET, Dept Cs Geol Pabellon 2,Cdad Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Environmental magnetism in fluvial and loessic Holocene sediments and paleosols from the Chacopampean plain (Argentina) AB - The magnetic signals of fluvial and loessic sediments and paleosol sequences developed in the Chacopampean plain (Buenos Aires province, Argentina) are described and interpreted. To provide an analysis of the rock magnetism, sedimentological studies were performed, which led to a stratigraphic framework of so-called 'post-Pampean' sediments deposited in different paleoenvironments. The Lujan formation, composed of fine sand and pelitic sediments, is fluvial and includes floodplain facies, whereas the La Postrera Formations is eolian but particularly loessic. Variations in the magnetic signals observed in paleosols in the units were ascribed to pedogenic processes that occurred at different stages of soil development. An extensive process of dissolution of detrital ferrimagnetic minerals was recognized. In one paleosol, dissolution was accompanied by the appearance of a superparamagnetic (SP) fraction, which may indicate that the loss is connected to subsequent formation of ferrimagnetic minerals in the same paleosol. Both processes did not act simultaneously. The abundant rainfall and absence of CO3Ca in the parent material could be necessary conditions for a defensible scenario for SP genesis. In the loessic sediments (Tapalque locality), dissolution could be associated with the genesis of a high coercive fraction. The presence of high coercivity minerals may indicate a climate with a distinctly dry season, though their lack does not necessarily imply the absence of a dry season. (C) 2003 Elsevier Ltd. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000189111100006 L2 - environmental magnetism;late cenozoic;paleoclimate;paleosol SO - Journal of South American Earth Sciences 2003 ;16(4):259-274 9008 UI - 7710 AU - Orlov Y AU - Alvarez J AU - Acho L AU - Aguilar L AD - Mexican Sci Res & Adv Studies Ctr, CICESE, Dept Elect & Telecommun, San Diego, CA 92143, USAIPN, Ctr Invest & Desarrollo Tecnol Digital, Tijuana, BC, MexicoOrlov, Y, Mexican Sci Res & Adv Studies Ctr, CICESE, Dept Elect & Telecommun, POB 434944, San Diego, CA 92143 USA TI - Global position regulation of friction manipulators via switched chattering control AB - Switched position control algorithms are developed to globally stabilize friction mechanical manipulators around a desired position. Both static and dynamic position feedback designs are presented. The controllers constructed, referred to as chattering controllers, do not rely on the generation of sliding motions while providing robustness features similar to those possessed by their sliding mode counterparts. Stability analysis is given within the Lyapunov vector functions framework extended to discontinuous dynamic systems. Performance issues of the chattering controllers are evaluated in an experimental study of a three degrees-of-freedom robot manipulator MH - USA MH - Mexico|Baja California PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000184787400006 L2 - SLIDING MODE CONTROL; SYSTEMS SO - International Journal of Control 2003 ;76(14):1446-1452 9009 UI - 7376 AU - Oropeza-Hernandez LF AU - Quintanilla-Vega B AU - Reyes-Mejia RA AU - Serrano CJ AU - Garcia-Latorre EA AU - Dekant W AU - Manno M AU - Albores A AD - IPN, Sec Toxicol, Ctr Invest & Estudios Avanzados, CINVESTAV, Mexico City 07360, DF, MexicoIPN, CINVESTAV, Dept Fisiol Biofis & Neurosci, Mexico City 07360, DF, MexicoIPN, ENCB, Dept Inmunol, Mexico City 07360, DF, MexicoUniv Wurzburg, Inst Toxikol, Wurzburg, GermanyUniv Padua, Dipartimento Med Ambientale & Sanita Publ, Padua, ItalyAlbores, A, IPN, Sec Toxicol, Ctr Invest & Estudios Avanzados, CINVESTAV, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Trifluoroacetylated adducts in spermatozoa, testes, liver and plasma and CYP2E1 induction in rats after subchronic inhalatory exposure to halothane AB - The induction of cytochrome P450 (CYP) 2E1 in testes and liver and the presence of trifluoroacetylated (TFA) adducts in spermatozoa, testes, liver and plasma were investigated in rats subchronically exposed by inhalation to halothane (15 ppm/4 h/day/5 days/week/9 weeks). After halothane exposure, p-nitrophenol hydroxylase (p-NPH) activity increased 3.2-fold and CYP2E1 apo-protein content 7-fold in testes, whereas in liver, p-NPH increased 2.3-fold and CYP2E1 apoprotein content 1.4-fold. These results suggest a differential inductive effect of halothane on CYP2E1 in these tissues. Moreover, TFA adducts were present in microsomes of testis and liver and in plasma of halothane-treated rats. The immunoblot analysis of testicular microsomes showed two intense TFA protein bands of 63 and 59 kDa, whereas in liver three intense bands of 100, 76 and 63 kDa were observed. Bands of similar molecular weights to those observed in liver were detected in the plasma of halothane-treated animals. In addition, TFA adducts were detected by immunofluorescence in spermatozoa, probably in the acrosome and/or perinuclear theca region, and in the distal tail of spermatozoa. The increase in CYP2E1 apoprotein and p-NPH activity observed in testis and liver microsomes suggests that halothane induces its own biotransformation both hepatically and extrahepatically and in addition, that the nature of the TFA adducts will depend on the proteins present in each tissue. Also, the presence of TFA adducts in spermatozoa may result from the activation of halothane in the reproductive tract. The detailed mechanism of TFA adduct formation and its consequences on the spermatozoa function remain to be fully clarified. (C) 2002 Elsevier Ireland Ltd. All rights reserved MH - Germany MH - Italy MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 1 U4 - Toxicology U5 - J;Article AV - English IS - 0378-4274 UR - ISI:000185531100011 L2 - CYP2E1;halothane;TFA adducts;spermatozoa;CYTOCHROME-P450 2E1; PROTEIN ADDUCTS; AMINO GROUPS; EXPRESSION; HEPATITIS; CALRETICULIN; METABOLISM; TOXICITY; SPERM; ANESTHETICS SO - Toxicology Letters 2003 ;144(1):105-116 9010 UI - 7978 AU - Orozco-Lugo AG AU - Lara MM AU - McLernon DC AU - Muro-Lemus HJ AD - IPN, CINVESTAV, Secc Comunicaciones, Mexico City 07738, DF, MexicoUniv Leeds, Sch Elect & Elect Engn, Inst Integrated Informat Syst, Leeds LS2 9JT, W Yorkshire, EnglandOrozco-Lugo, AG, IPN, CINVESTAV, Secc Comunicaciones, Mexico City 07738, DF, Mexico TI - Multiple packet reception in wireless ad hoc networks using polynomial phase-modulating sequences AB - This paper proposes a blind interference cancellation algorithm that is able to provide multiple packet reception capability for asynchronous random access wireless mobile ad hoc networks. The algorithm exploits the fact that the baseband signal exhibits cyclostationarity properties, which are induced at the transmitters by means of modulating the symbols with polynomial phase sequences. This modulation does not expand the bandwidth and can be considered as a "color code" that can be used to distinguish one transmission from the others (i.e., packets from other users). The proposed technique does not require knowledge of the starting time of transmission of the desired signal and can also be applied to time-dispersive multipath channels. In addition, a practical way of assigning the color codes via the use of a common codebook known to all nodes is proposed, and the impact on local throughput of such a scheme is analyzed. Simulation results illustrate the excellent performance of the proposed approach MH - United Kingdom MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1053-587X UR - ISI:000184090200008 L2 - blind space-time processing;medium access control;multipacket reception;polynomial phase signals;random access;BLIND CHANNEL IDENTIFICATION; INDUCED CYCLOSTATIONARITY; ANTENNA-ARRAYS; EQUALIZATION; WATERMARKING; PERFORMANCE; SIGNALS SO - Ieee Transactions on Signal Processing 2003 ;51(8):2093-2110 9011 UI - 7651 AU - Orozco A AU - Ogura T AU - Beltran-Garcia MJ AU - Kubo I AD - Tequila Herradura, Div Res & Dev, Guadalajara, Jalisco, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Berkeley, CA 94720, USAOgura, T, Tequila Herradura, Div Res & Dev, Comercio 172-1,Col Mexicaltzingo, Guadalajara, Jalisco, Mexico TI - Growth inhibition of bacteria by salsa mexicana AB - Antimicrobial activity of salsa mexicana against Escherichia coli,,Klebsiella pneumoniae, Bacillus subtilis, Bacillus cereus, Staphylococcus aureus, and Saccharomyces cerevisiae was studied. The pressed salsa juice suppressed completely the growth of E. coli, B. subtilis, and S. aureus. K. pneumoniae and B. cereus were suppressed partly but Saccharomyces cerevisiae was not suppressed at all by the juice. Three types of microbicidal or microbiostatic components have been found: (1) H+, (2) volatile compounds, and (3) non-ionized carboxylic acids or analogous compounds. It is proposed that the supplementation of stink bugs in the salsa seen widely in the south of Mexico is used to intensify the herbal odor of the salsa MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000184910500003 L2 - carboxylic acids;growth inhibition;hexenal;microorganisms;salsa mexicana;stink bug;STINK BUG; DEFENSE SO - Journal of Food Science 2003 ;68(6):1896-1899 9012 UI - 6761 AU - Ortega-Garcia S AU - Lluch-Belda D AU - Fuentes PA AD - IPN, Ctr Interdisciplinario Ciencias Marinas, Mexico City 23000, DF, MexicoScripps Inst Oceanog, Interamer Trop Tuna Commiss, La Jolla, CA 92097, USAOrtega-Garcia, S, IPN, Ctr Interdisciplinario Ciencias Marinas, Av Inst Politecn Nacl S-N,Col Playa Palo Santa Ri, Mexico City 23000, DF, Mexico TI - Spatial, seasonal, and annual fluctuations in relative abundance of yellowfin tuna in the eastern Pacific Ocean during 1984-1990 based on fishery CPUE analysis AB - Spatial and seasonal fluctuations of the relative abundance of yellowfin tuna in the eastern Pacific Ocean was analyzed using the logbook records of the Mexican tuna purse-seine fleet that operated during 1984-1990. We used fishing day as the unit of effort, standardized through the principal components analysis. The first three components in the model were significant. The catch-per-unit-effort monthly average as an index of abundance was estimated for one-degree area quadrants for the total fleet operation area and classified into five levels of abundance for graphic presentation. The variation of seasonal relative abundance was meaningful, with its maximum during the second quarter. Variation of annual relative abundance was also significant with a minimum during 1984 and a maximum in 1986. This led us to believe the El Nino (1986-1987) had no relevant effect on the abundance of the resource. The lowest relative abundance (12 t per fishing day) coincided with the greatest percentage of unsuccessful fishing, and it was found in northwest Mexico. The greatest abundance was found in the oceanic area (west of 120degreesW; 18.5 t per day fishing) coinciding with the area of low-percentage unsuccessful fishing. No significant differences were found in the average catch-per-standard-day-fishing distribution and value between the pre-1988 period, when operations in the area were dominated by the U.S. fleet and those after 1988 when the Mexican fleet took its place MH - Mexico|Distrito Federal MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000187026500002 SO - Bulletin of Marine Science 2003 ;72(3):613-628 9013 UI - 9224 AU - Ortega-Lopez M AU - Vigil-Galan O AU - Gandarilla FC AU - Solorza-Feria O AD - IPN, CINVESTAV, Dept Quim, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Ingn Elect, Mexico City 07738, DF, MexicoIPN, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaSolorza-Feria, O, IPN, CINVESTAV, Dept Quim, Apdo Postal 14-740, Mexico City 07738, DF, Mexico TI - Preparation of AgInS2 chalcopyrite thin films by chemical spray pyrolysis AB - AgInS2 thin films were prepared by the spray pyrolysis technique using a water/ethanol solution containing silver acetate, indium chloride and thiourea. We reported our results on the characterization of tetragonal AgInS2 (chalcopyrite type) films, which were grown from indium deficient spraying solution. The films displayed a n-type conductivity with room temperature resistivities in the range between 10(3) and 10(4) Q cm. The absorption spectra of sprayed films revealed two direct band-gaps with characteristic energies around 1.87 and 2.01 eV, which are in good agreement with the reported energy values for interband transitions from the split p-like valence band to the s-like conduction band in tetragonal AgInS2 single crystals. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000180718200007 L2 - chalcopyrite;chemical spray pyrolysis;X-ray diffraction;optical properties;SOLAR-CELLS SO - Materials Research Bulletin 2003 ;38(1):55-61 9014 UI - 6922 AU - Ortega-Mayagoitia E AU - Rojo C AU - Rodrigo MA AD - Univ Valencia, Inst Cavanilles Biodivers & Evolutionary Biol, Lab Limnol, E-46071 Valencia, SpainUniv Nacl Autonoma Mexico, FES Iztacala, UIICSE, CyMA,Lab Limnol, Tlalnepantla 54090, Estado Mexico, MexicoRojo, C, Univ Valencia, Inst Cavanilles Biodivers & Evolutionary Biol, Lab Limnol, Apdo Oficial 22085, E-46071 Valencia, Spain TI - Controlling factors of phytoplankton assemblages in wetlands: an experimental approach AB - The aim of this work is to answer some questions like: what factors control the phytoplankton assemblage? What factor or factors are perturbing the assemblage? What factors are driving or maintaining the stability? Are the different responses to the control factors dependent on the hierarchy level? For that, we tested experimentally the influence of herbivory, planktivory, nutrients and sediment on phytoplankton assemblages and its stability from a hypertrophic wetland (Las Tablas de Daimiel National Park, Spain) in three microcosm experiments. The study of the steady state phytoplankton assemblages in this perturbed system could point out some underlying processes instead of competition. The presence of planktivorous fish and the different composition of zooplankton have minor importance in phytoplankton composition. Conversely, sediment is of paramount importance, promoting a more diverse phytoplankton assemblage. When sediment or nutrient pulses are absent, phytoplankton become dominated by slow-growing algae, present but not dominant in the studied wetland community. We suggest that alternate states of phytoplankton assemblages in a eutrophic wetland occur as a sequence of substitutions persistently altered by perturbations, thanks to the close coupling with sediment, and that possibly trophic relationships are irrelevant MH - Mexico|Estado De Mexico MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000186636900015 L2 - steady state;sediment;Tablas de Daimiel National Park;perturbations;nutrient pulses;food web;DOMINATED LAKE; TOP-DOWN; ZOOPLANKTON; FISH; COMMUNITIES; DISTURBANCE; COMPETITION; HAPTOPHYTA; NUTRIENTS; DYNAMICS SO - Hydrobiologia 2003 ;502(1-3):177-186 9015 UI - 7555 AU - Ortega-Obregon C AU - Keppie JD AU - Solari LA AU - Ortega-Gutierrez F AU - Dostal J AU - Lopez R AU - Ortega-Rivera A AU - Lee JWK AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoSt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaW Valley Coll, Dept Geol, Saratogo, CA 95070, USAQueens Univ, Dept Geol, Kingston, ON K7L 3NG, CanadaKeppie, JD, Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Geochronology and geochemistry of the-917 Ma, calc-alkaline Etla granitoid pluton (Oaxaca, southern Mexico): Evidence of post-grenvillian subduction along the northern margin of Amazonia AB - The post-tectonic Etla pluton intrudes the similar to1 Ga granulitic Oaxacan Complex that cooled through 450degreesC by similar to945 Ma. The Etla pluton consists of massive, coarse, porphyritic granodiorite-monzogranite (plagioclase, K-feldspar, quartz, biotite +/- hornblende) with fine-grained felsic rocks along the margin. Geochemistry indicates that it is a peraluminous, I-type, medium-K, calc-alkaline, volcanic-are granite-trondjemite with relatively low contents of high-field-strength elements and flat BEE patterns. U-Pb zircon isotopic analyses fall on a chord with intercepts at 180 +/- 50 Ma and 920 +/- 25 Ma: the latter is similar to the Pb-207/Pb-206 age of 917 +/- 6 Ma of the least discordant (1%) analysis and is inferred to date the time of intrusion. This pluton is synchronous with similar igneous activity in Avalonia (eastern Appalachians) and in Tocantins Province of central Brazil, which may form parts of a peri-Amazonian magmatic arc. Ar-40/Ar-39 laser step-heating analyses of biotite and K-feldspar yielded plateau ages of 207 +/- 5 Ma and 221 +/- 3 Ma, respectively, that may be related to Phanerozoic reheating MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 8 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000185110500002 L2 - TECTONIC INTERPRETATION; LAURENTIA; PB; DISCRIMINATION; ASSEMBLAGES; ELEMENTS; PROVINCE; COMPLEX; TERRANE; ZIRCON SO - International Geology Review 2003 ;45(7):596-610 9016 UI - 7493 AU - Ortega J AU - Maldonado JE AU - Wilkinson GS AU - Arita HT AU - Fleischer RC AD - Smithsonian Inst, Natl Museum Nat Hist, Genet Program, Washington, DC 20008, USAUniv Maryland, Dept Biol, College Pk, MD 20742, USAUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoOrtega, J, Smithsonian Inst, Natl Museum Nat Hist, Genet Program, 3001 Connecticut Ave, Washington, DC 20008 USA TI - Male dominance, paternity, and relatedness in the Jamaican fruit-eating bat (Artibeus jamaicensis) AB - We analysed variation at 14 nuclear microsatellite loci to assess the genetic structure, relatedness, and paternity of polygynous Jamaican fruit-eating bats. A total of 84 adults captured in two caves exhibited little genetic differentiation between caves (F-ST = 0.008). Average relatedness among adult females in 10 harem groups was very low (R = 0.014 +/- 0.011), providing no evidence of harem structure. Dominant and subordinate males shared paternity in large groups, while dominant and satellite males shared paternity in smaller groups. However, our results suggest that male rank influences paternity. Dominant males fathered 69% of 40 offspring, followed by satellite (22%) and subordinate males (9%). Overall adult male bats are not closely related, however, in large harem groups we found that subordinate and dominant males exhibited relatedness values consistent with a father-offspring relationship. Because dominant and subordinate males also sired all the pups in large groups, we propose that their association provides inclusive fitness to them MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000185256500011 L2 - Artibeus jamaicensis;genetic structure;male dominance;microsatellites;paternity;relatedness;COMMON VAMPIRE BAT; PHYLLOSTOMUS-HASTATUS; SOCIAL-ORGANIZATION; POLYGYNOUS BAT; GENETIC CONSEQUENCES; CYNOPTERUS SPHINX; PLECOTUS-AURITUS; MATING SYSTEMS; CHIROPTERA; MITOCHONDRIAL SO - Molecular Ecology 2003 ;12(9):2409-2415 9017 UI - 8835 AU - Ortega R AU - Herrmann RB AU - Quintanar L AD - Univ Texas, Dept Geol Sci, El Paso, TX 79968, USASt Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63103, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoOrtega, R, Univ Texas, Dept Geol Sci, 500 W Univ Ave, El Paso, TX 79968 USA TI - Earthquake ground-motion scaling in central Mexico between 0.7 and 7 Hz AB - We present results from a regional study of ground-motion scaling parameters in central Mexico using data from a short-period vertical-component network and two broadband stations within the valley of Mexico. A total of 1220 waveforms recorded between 1994 and 2001 are used for the analysis. A damped least-squares regression using a simple model to separate the excitation, site, and propagation effects for the peak velocities in selected narrow-bandpass frequencies was carried out. The propagation term was parameterized to define a piecewise continuous geometrical spreading function, a frequency-dependent Q(f), and a distance-dependent duration that are consistent with the random vibration theory. We measured the average attenuation of S and Lg waves. A final model with a quality factor of Q(f) = 180f(0.66) and a geometrical spreading of [GRAPHICS] is used for the parameterization of the ground-motion scaling. We find that this region is characterized by a rapid decay of ground-motion amplitude with distance, similar to that in other tectonically active regions MH - Mexico|Distrito Federal MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000181971700027 L2 - PEAK HORIZONTAL ACCELERATION; 1985 MICHOACAN; SOURCE SPECTRA; SITE RESPONSE; SHEAR-WAVES; SOUTHERN CALIFORNIA; LOCAL EARTHQUAKES; SEISMIC HAZARD; VOLCANIC BELT; S-WAVES SO - Bulletin of the Seismological Society of America 2003 ;93(1):397-413 9018 UI - 6834 AU - Ortiz-Garcia S AU - Gernandt DS AU - Stone JK AU - Johnston PR AU - Chapela IH AU - Salas-Lizana R AU - varez-Buylla ER AD - Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, MexicoUniv Autonoma Estado Hidalgo, Ctr Invest Biol, Pachuca 42001, Hidalgo, MexicoOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USALandcare Res, Auckland, New ZealandUniv Calif Berkeley, Div Ecosyst Sci, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Dept Ecol Evlout, Inst Ecol, Mexico City 04510, DF, MexicoOrtiz-Garcia, S, Inst Nacl Ecol, SEMARNAT, Periferico Sur 5000,5o Piso, Mexico City 04530, DF, Mexico TI - Phylogenetics of Lophodermium from pine AB - Lophodermium comprises ascomycetous fungi that are both needle-cast pathogens and asymptomatic endophytes on a diversity of plant hosts. It is distinguished from other genera in the family Rhytismataceae by its filiform ascospores and ascocarps that open by a longitudinal slit. Nucleotide sequences of the internal transcribed spacer (ITS) region of nuclear ribosomal DNA were used to infer phylogenetic relationships within Lophodermium. Twenty-nine sequences from approximately 11 species of Lophodermium were analyzed together with eight sequences from isolates thought to represent six other genera of Rhytismataceae: Elytroderma, Lirula, Meloderma, Terriera, Tryblidiopsis and Colpoma. Two putative Meloderma desmazieresii isolates occurred within the Lophodermium clade but separate from one another, one grouped with L. indianum and the other with L. nitens. An isolate of Elytroderma deformans also occurred within the Lophodermium clade but on a solitary branch. The occurrence of these genera within the Lophodermium clade might be due to problems in generic concepts in Rhytismataceae, such as emphasis on spore morphology to delimit genera, to difficulty of isolating Rhytismataceae needle pathogens from material that also is colonized by Lophodermium or to a combination of both factors. We also evaluated the congruence of host distribution and several morphological characters on the ITS phylogeny. Lophodermium species from pine hosts formed a monophyletic sister group to Lophodermium species from more distant hosts from the southern hemisphere, but not to L. piceae from Picea. The ITS topology indicated that Lophodermium does not show strict co-speciation with pines at deeper branches, although several closely related isolates have closely related hosts. Pathogenic species occupy derived positions in the pine clade, suggesting that pathogenicity has evolved from endophytism. A new combination is proposed, Terriera minor (Tehon) P.R. johnst MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - New Zealand MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 11 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000186873900008 L2 - endophyte;evolution;ITS region;pathogen;phylogeny;Rhytismataceae;NUCLEAR RIBOSOMAL DNA; INTERNAL TRANSCRIBED SPACER; NEW-ZEALAND; MOLECULAR PHYLOGENY; ENDOPHYTIC FUNGI; SEQUENCES; RHYTISMATACEAE; NEEDLES; GENUS; COMMUNITIES SO - Mycologia 2003 ;95(5):846-859 9019 UI - 6756 AU - Ortiz-Hernandez ML AU - Quintero-Ramirez R AU - Nava-Ocampo AA AU - Bello-Ramirez AM AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca, Morelos, MexicoUniv Autonoma Estado Morelos, Ctr Invest Biotecnol, Lab Invest Ambientales, Cuernavaca, Morelos, MexicoHosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaUniv Toronto, Leslie Dan Fac Pharm, Mol Design & Informat Technol Ctr, Toronto, ON, CanadaBello-Ramirez, AM, Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca, Morelos, Mexico TI - Study of the mechanism of Flavobacterium sp for hydrolyzing organophosphate pesticides AB - The biotransformation by Flavobacterium sp. of the following organophosphate pesticides was experimentally and theoretically studied: phorate, tetrachlorvinphos, methyl-parathion, terbufos, trichloronate, ethoprophos, phosphamidon, fenitrothion, dimethoate and DEF. The Flavobacterium sp. ATCC 27551 strain bearing the organophosphate-degradation gene was used. Bacteria were incubated in the presence of each pesticide for a duration of 7 days. Parent pesticides were identified and quantified by means of a gas-chromatography mass spectrum system. Activity was considered as the amount (mumol) of each pesticide degraded by Flavobacterium sp. Also, structural parameters obtained by means of the CAChe program package for biomolecules, the reactivity index of phosphorus, of oxygen at the P=O function and of sulfur at the P=S function, and lipophilicity (log P-oct) (ALOGPS v. 2.0) were obtained for each pesticide. Pesticides were hydrolyzed at the bond between phosphorous and the heteroatom, producing phosphoric acid and three metabolites. Enzymatic activity was significantly explained by the following multiple linear relationship: Enzymatic activity = 162.2 - 9.5(dihedral angle energy) - 25.0(Total energy) - 0.51(Molecular weight). Finally, a mechanism of Flavobacterium sp. to hydrolyze pesticides was proposed MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0767-3981 UR - ISI:000187073900009 L2 - drug metabolic detoxication;phosphotriesterase;structure-activity;relationship;PHOSPHOTRIESTERASE; INTOXICATION; PARATHION; OXIDATION; QSAR; GENE SO - Fundamental & Clinical Pharmacology 2003 ;17(6):717-723 9020 UI - 8264 AU - Ortiz-Navarrete V AU - Pelayo-Camacho R AU - Rosas A AU - Limon A AD - CINVESTAV, Mexico City 07360, DF, MexicoOklahoma Med Res Fdn, Oklahoma City, OK 73104, USAHosp LaRaza, IMSS, Mexico City, DF, MexicoIMSS, Puebla, Mexico TI - Down-regulation of MHC class I molecules after hematopoietic cell transplantation is associated to HCMV infection and impairs fully T CD8 MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000182367000534 SO - Faseb Journal 2003 ;17(7):C115-C115 9021 UI - 7879 AU - Ortiz-Posadas MR AU - Dazzi RLS AU - Hahne MNMA AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, Mexico. Univ Fed Santa Catarina, BR-88040900 Florianopolis, SC, Brazil TI - A method to evaluate computational programs using the logical combinatorial approach AB - The objective of this work was to develop a method to assist the evaluation of computational programs trying to standardize some of the criteria utilized. The method is based in the mathematical modeling developed for the problem, using the logical combinatorial approach of pattern recognition theory. We defined eight variables and their domains, the comparison criteria for each variable and an analogy function, which allows us to quantify the likelihood between two programs. Also, we used a partial precedence algorithm called a majority (voting) algorithm to classify the programs under consideration. To validate the method, we selected twelve study cases from the "Algorithms" course, which is part of the curriculum of the first two periods of the course in computer science in the Universidade do Vale de Itajai (UNIVALI) of the State of Santa Catarina in Brasil. The programs were classified adequately in all cases MH - Brazil MH - Mexico|Distrito Federal T3 - COMPUTATIONAL SCIENCE AND ITS APPLICATIONS - ICCSA 2003Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBX11U AV - English IS - 0302-9743 UR - ISI:000184326400071 SO - 2003 ;():674-683 9022 UI - 9300 AU - Ortiz GG AU - Zuniga-Gonzalez G AU - Garcia JJ AU - Torres-Bugarin O AU - Zamora-Perez A AU - Bitzer-Quintero OK AD - IMSS, CIBO, Div Neurociencias, Lab Desarrollo Envejecimiento Enfermedades Neurod, Guadalajara 44340, Jalisco, MexicoIMSS, CIBO, Div Med Mol, Lab Mutagenesis, Guadalajara, Jalisco, MexicoUniv Zaragoza, Fac Med, Dept Fisiol & Farmacol, Zaragoza, SpainUniv Autonoma Guadalajara, Inst Ciencias Biol, Fac Med, Program Int, Guadalajara, Jalisco, MexicoOrtiz, GG, IMSS, CIBO, Div Neurociencias, Lab Desarrollo Envejecimiento Enfermedades Neurod, Sierra Mojada 800, Guadalajara 44340, Jalisco, Mexico TI - 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced lipid peroxidation and DNA damage in mouse bone marrow and blood AB - 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a neurotoxin that induces Parkinsonism in humans, monkeys, and mice and oxidative stress in mammalian cells and tissues. In the present study, the relationship between the generation of lipid peroxidation products and DNA damage was studied in mice treated with MPTP. The frequency of micronucleated polychromatic erythrocytes (MN-PCE) and the concentrations of malonalclehyde and 4-hydroxyalkenals were determined in the bone marrow and peripheral blood of mice 0, 24, 48, 72, and 96 hr after treatment with MPTP, cyclophosphamide as a positive control, or diluent. Both MN-PCE and the lipid peroxidation products increased in MPTP-treated mice, with significant levels being detected in bone marrow starting at 24 hr after treatment and in blood starting of 48 hr after treatment. These results suggest that the generation of oxidative products is related to the DNA damage produced by MPTP in mice. (C) 2003 Wiley-Liss, Inc MH - Mexico|Jalisco MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0893-6692 UR - ISI:000180698700008 L2 - micronucleated polychromatic erythrocytes;MPTP;oxidative damage;system;lipid peroxidation;MPTP; MICRONUCLEI; MICE; NEUROTOXICITY; MELATONIN; TOXICITY; PARAQUAT; BRAIN SO - Environmental and Molecular Mutagenesis 2003 ;41(1):64-68 9023 UI - 9115 AU - Ortiz I AU - Auria R AU - Sigoillot JC AU - Revah S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Procesos & Hidraul, Mexico City 09340, DF, MexicoInst Rech Dev, F-13288 Marseille 9, FranceUniv Aix Marseille 1, CESB, ESIL, INRA, F-13288 Marseille 9, FranceRevah, S, Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Procesos & Hidraul, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Enhancing phenanthrene biomineralization in a polluted soil using gaseous toluene as a cosubstrate AB - Laboratory experiments were conducted to study the potential of adding gaseous toluene, as a readily degradable carbon source, to enhance phenanthrene mineralization in polluted soil (1000 mg/kg(dry) (soil)) aged for 400 days. Experiments were conducted in 0.5-L column reactors packed with a mixture of (80:20 w(wet)/w(wet)) spiked soil and vermiculite and fed with 1 g m(reactor)(-3) h(-1) toluene load in air. Removal efficiencies of 100% for toluene and greater than 95% for phenanthrene were obtained in 190 h. Evolved CO2 showed that phenanthrene mineralization increased from 39% to 86% in columns treated with gaseous toluene. Phthalic acid was identified as the principal soluble intermediate, which accumulated when no toluene was added. Increased phenanthrene uptake and mineralization with toluene can be attributed to increased biomass and the induction of enzymes involved in the intermediate mineralization. In microcosm experiments, phthalic acid mineralization increased from 19% to 81% within 50 h in the presence of toluene. Experiments with C-14-labeled phenanthrene confirmed the enhancement of phenanthrene mineralization from 45% to 83% in 385 h with toluene as a second carbon source. The results indicate that the addition of an appropriate gaseous cosubstrate could be an adequate strategy to enhance mineralization of PAHs in soil MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0013-936X UR - ISI:000181067100022 L2 - POLYCYCLIC AROMATIC-HYDROCARBONS; NONAQUEOUS-PHASE LIQUIDS; PHANEROCHAETE-CHRYSOSPORIUM; BIODEGRADATION KINETICS; CONTAMINATED SOIL; BIOAVAILABILITY; MINERALIZATION; DEGRADATION; MIXTURES; OIL SO - Environmental Science & Technology 2003 ;37(4):805-810 9024 UI - 9078 AU - Ortiz JJ AU - Requena I AD - Univ Granada, Dpto Ciencias Computac & IA, E-18071 Granada, SpainRequena, I, Natl Nucl Res Inst, Salazar 52045, Estado Mexico, Mexico TI - Using neural networks to predict core parameters in a boiling water reactor AB - The problem of optimizing refueling in a nuclear boiling water reactor is difficult since it concerns combinatorial optimization and it is NP-Complete. In order to solve this problem, many techniques have been applied, ranging from expert systems to genetic algorithms. In most of these procedures, nuclear reactor simulators are used, which require a longer computation time, to evaluate the goodness of the proposed solutions. As the processes are iterative, many evaluations with the simulator are necessary, and this makes the process extremely slow. In this paper, the use of trained neural networks (NNs) is proposed as an alternative to the simulator, and the results of the NN training are shown in order to predict some variables of interest in the optimization, such as the effective multiplication factor and some thermal limits, related to safety aspects. Finally, a study about the effect of modifying several NN parameters is shown MH - Mexico|Estado De Mexico MH - Spain PB - LA GRANGE PK: AMER NUCLEAR SOCIETY RP - NOT IN FILE U3 - TC 2 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0029-5639 UR - ISI:000181135900004 L2 - FUEL SO - Nuclear Science and Engineering 2003 ;143(3):254-267 9025 UI - 8459 AU - Ortiz M AU - Bilham R AD - CICESE, Dept Oceanog, Ensenada 22860, Baja California, MexicoUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USAOrtiz, M, CICESE, Dept Oceanog, Ensenada 22860, Baja California, Mexico TI - Source area and rupture parameters of the 31 December 1881 M-w=7.9 Car Nicobar earthquake estimated from tsunamis recorded in the Bay of Bengal AB - [1] On the morning of 31 December 1881 a submarine earthquake beneath the Andaman Islands generated a tsunami with a maximum crest height of 0.8 m that was recorded by eight tide gauges surrounding the Bay of Bengal. Since the earthquake occurred 8 years before the construction of the world's first teleseismic recording seismometer, little has been known about its rupture parameters or location. Waveform and amplitude modeling of the tsunami indicate that it was generated by a M-w = 7.9 +/- 0.1 rupture on the India/Andaman plate boundary resulting in 10-60 cm of uplift of the island of Car Nicobar. The rupture consisted of two segments: the northern 40-km-long segment is separated from the southern 150-km-long segment by a 100-km region corresponding to the westward projection of the West Andaman spreading center. The main rupture occurred between 8.5degreesN and 10degreesN with a total area of 150 km x 60 km dipping 20degreesE with a mean slip of 2.7 m. The recurrence time for 1881-type events is estimated to be 114-200 years on the basis of inferred GPS convergence rates and inferred plate closure vectors, although slip partitioning in the region may extend this estimate by as much as 30% MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 18 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000182845200004 L2 - earthquake;rupture zone;tsunami records 1881;Bay of Bengal;NORTHEASTERN INDIAN-OCEAN; CURRENT PLATE MOTIONS; ANDAMAN SEA; DEFORMATION; ARC; SEISMICITY; TECTONICS; HISTORY; TIME; SEISMOTECTONICS SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B4): 9026 UI - 5855 AU - Osnaya R AU - Arroyo GA AU - Parada L AU - Delgado F AU - Trujillo J AU - Salmon M AU - Miranda R AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan Campo 1, Cuautitlan 54740, Estado De Mexic, MexicoEscuela Quim Univ El Salvador, San Salvador, El SalvadorInst Politecn Nacl, Escuela Nacl Ciencia Biol, Mexico City 11340, DF, MexicoInst Politecn Nacl, Escuela Super Med, Mexico City 11340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMiranda, R, Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan Campo 1, Av Iro de Mayo S-N,Colonia Santa Maria las Torres, Cuautitlan 54740, Estado De Mexic, Mexico TI - Biginelli vs Hantzsch esters study under infrared radiation and solventless conditions AB - In this work, we report the results obtained during the condensation of various benzaldehydes with ethyl acetoacetate and urea or thiourea, in the presence of a bentonitic clay as catalyst. These reactions were performed under solventless conditions with infrared radiation as the energy source. Both Biginelli and Hantzsch esters were synthesized, with the Biginelli compounds being the main products. Finally, the obtained compounds were characterized by comparison of the corresponding melting points with those reported in the literature, together with the EIMS data and the elemental composition obtained by high resolution MS MH - El Salvador MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - GAINESVILLE: ARKAT USA INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English UR - ISI:000220556800012 L2 - Biginelli;Hantzsch;solventless;infrared radiation;bentonitic clay;ONE-POT SYNTHESIS; 1,3-DICARBONYL COMPOUNDS; HYDRATED ACRIDINE-1,8-DIONES; DIHYDROPYRIMIDINE SYNTHESIS; MICROWAVE IRRADIATION; CONDENSATION REACTION; EFFICIENT SYNTHESIS; ORGANIC-SYNTHESIS; ACID-ESTERS; 3,4-DIHYDROPYRIMIDIN-2(1H)-ONES SO - Arkivoc 2003 ;():112-117 9027 UI - 8141 AU - Osnayo JL AU - Ibarra RR AU - O'Halloran RA AU - Boland JM AU - Brunner E AU - Levitt L AU - Dossenbach M AD - Hosp Nacl Guillermo Almenara, Lima, PeruFelix Gomez & Constituc, Monterrey, NL, MexicoEli Lilly Mexico SA CV, Mexico City, DF, Mexico TI - Change in clinical status and side effects of patients treated with either olanzapine or risperidone: 6-month results from the 3-year intercontinental schizophrenia outpatient health outcomes (ic-soho) observational study MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Peru PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0006-3223 UR - ISI:000182436000076 SO - Biological Psychiatry 2003 ;53(8):28S-29S 9028 UI - 7546 AU - Osorio-Diaz P AU - Bello-Perez LA AU - Sayago-Ayerdi SG AU - itez-Reyes MDP AU - Tovar J AU - Paredes-Lopez O AD - IPN, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoInst TEcnol Acapulco, Guerrero 39300, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041 A, VenezuelaIPN, Ctr Invest & Estud Avanzados, Unidad Irapuato, Guanajuato 36500, MexicoBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, Km 8-5 Carr, Yautepec 62731, Morelos, Mexico TI - Effect of processing and storage time on in vitro digestibility and resistant starch content of two bean (Phaseolus vulgaris L) varieties AB - Seeds from two commercial bean varieties were cooked and stored for different times and analysed for chemical composition and in vitro starch digestibility. Parallel portions of cooked seeds were dried at 55 degreesC, milled and stored as flours. In general, protein and ash contents in both samples did not change with storage time, but statistical differences were shown between the two varieties (p < 0.05). Available starch (AS) contents in flours from the 'negro' variety did not change (p < 0.05) with storage time and, in general, were higher than in 'flor de mayo' samples, whose AS levels decreased during storage. The lower AS in 'flor de mayo' flour could be the consequence of formation of resistant starch due to retrogradation. Samples of whole 'negro' seeds did not show differences in AS content at 0, 24 and 48 h of storage compared with the corresponding flours, but at 72 and 96 h the AS increased in the whole samples. 'Flor de mayo' showed a similar pattern in flour and whole samples, with slightly higher values in the whole seeds. In general, total resistant starch (RS) content in the two varieties was higher in the flours than in 'whole' seeds, a fact that is not easy to explain at present. 'Negro' flour presented an RS content around 65.0 g kg(-1), and approximately 55.0 g kg(-1) was recorded in 'flor de mayo', with slight changes when storage time increased. Whole 'flor de mayo' showed significant levels of the retrograded portion of resistant starch (RRS), which did not change with storage time (p < 0.05). However, values were lower than in the flours. A pattern similar to that of the 'negro' variety was obtained for 'flor de mayo', since the flour exhibited higher amounts of RRS; however, in this variety, the RRS content in 'whole' samples decreased after prolonged storage. Flours presented higher amylolysis rates than whole samples, and the ease of digestion increased with storage time. (C) 2003 Society of Chemical Industry MH - Mexico|Guanajuato MH - Mexico|Guerrero MH - Mexico|Morelos MH - Venezuela PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000185120800015 L2 - resistant starch;beans;starch hydrolysis;legumes;chemical composition;SMALL-INTESTINE; GLYCEMIC-INDEX; INDIAN PULSES; BLOOD-GLUCOSE; STEAM-COOKING; DIGESTION; LEGUMES; FOOD; AVAILABILITY; HYDROLYSIS SO - Journal of the Science of Food and Agriculture 2003 ;83(12):1283-1288 9029 UI - 8891 AU - Osorio M AU - D'Alessio P AU - Muzerolle J AU - Calvet N AU - Hartmann L AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoUniv Arizona, Steward Observ, Tucson, AZ 85721, USAOsorio, M, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - A comprehensive study of the L1551 IRS 5 binary system AB - We model the Class I source L1551 IRS 5, adopting a flattened infalling envelope surrounding a binary disk system and a circumbinary disk. With our composite model, we calculate self-consistently the spectral energy distribution of each component of the L1551 IRS 5 system, using additional constraints from recent observations by ISO, the water ice feature from observations with SpeX, the SCUBA extended spatial brightness distribution at submillimeter wavelengths, and the VLA spatial intensity distributions at 7 mm of the binary disks. We analyze the sensitivity of our results to the various parameters involved. Our results show that a flattened-envelope collapse model is required to explain simultaneously the large-scale fluxes and the water ice and silicate features. On the other hand, we find that the circumstellar disks are optically thick in the millimeter range and are inclined so that their outer parts hide the emission along the line of sight from their inner parts. We also find that these disks have lower mass accretion rates than the infall rate of the envelope MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000181713500030 L2 - binaries : general;circumstellar matter;stars : formation;stars : individual (L1551 IRS 5);stars : pre-main-sequence;MILLIMETER-CONTINUUM OBSERVATIONS; AURIGA MOLECULAR CLOUD; YOUNG STELLAR OBJECTS; T-TAURI STARS; ACCRETION DISKS; INFRARED OBSERVATIONS; PROTOPLANETARY DISKS; CO; SPECTRUM; MODELS SO - Astrophysical Journal 2003 ;586(2):1148-1161 9030 UI - 7722 AU - Osorio MA AU - Laguna M AD - Univ Colorado, Leeds Sch Business, Boulder, CO 80309, USAAutonomous Univ Puebla, Sch Comp Sci, Puebla 72560, MexicoLaguna, M, Univ Colorado, Leeds Sch Business, 149 UCB, Boulder, CO 80309 USA TI - Logic cuts for multilevel generalized assignment problems AB - In the multilevel generalized assignment problem (MGAP) agents can perform tasks at more than one efficiency level. Important manufacturing problems, such as lot sizing, can be easily formulated as MGAPs; however, the large number of variables in the related 0-1 integer program makes it hard to find optimal solutions to these problems, even when using powerful commercial optimization packages. The MGAP includes a set of knapsack constraints, one per agent, that can be useful for generating simple logical constraints or logic cuts. We exploit the fact that logic cuts can be generated in linear time and can be easily added to the model before solving it with classical branch and bound methodology. We generate all contiguous 1-cuts for every knapsack in large MGAP's problems and report the effect of adding these cuts in our experimental results. (C) 2002 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Management;Operations Research & Management Science U5 - J;Article AV - English IS - 0377-2217 UR - ISI:000184767200016 L2 - branch and bound;generalized assignment problem;lot sizing;knapsack constraints;logic cuts;ALGORITHM; BRANCH SO - European Journal of Operational Research 2003 ;151(1):238-246 9031 UI - 7723 AU - Osornio-Vargas AR AU - Bonner JC AU - faro-Moreno E AU - Martinez L AU - Garcia-Cuellar C AU - Rosales SPD AU - Miranda J AU - Rosas I AD - Inst Nacl Cancerol, Div Invest Basica, Mexico City 14080, DF, MexicoNatl Inst Environm Hlth Sci, NIH, Res Triangle Pk, NC, USAUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoOsornio-Vargas, AR, Inst Nacl Cancerol, Div Invest Basica, Av San Fernando 22,Tlalpan, Mexico City 14080, DF, Mexico TI - Proinflammatory and cytotoxic effects of Mexico City air pollution particulate matter in vitro are dependent on particle size and composition AB - Exposure to urban airborne particulate matter (PM) is associated with adverse health effects. We previously reported that the cytotoxic and proinflammatory effects of Mexico City PM10 (less than or equal to 10 mum mean aerodynamic diameter) are determined by transition metals and endotoxins associated with these particles. However, PM2.5 (less than or equal to 2.5 mum mean aerodynamic diameter) could be more important as a human health risk because this smaller PM has the potential to reach the distal lung after inhalation. In this study, we compared the cytotoxic and proinflammatory effects of Mexico City PM 10 with those of PM2.5 using the routine monocytic J774A.1 cell line in vitro. PMs were collected from the northern zone or the southeastern zone of Mexico City. Elemental composition and bacterial endotoxin on PMs were measured. Tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) production by J774A. 1 cells was measured in the presence or absence of recombinant endotoxin-neutralizing protein (rENP). Both northern and southeastern PMs contained endotoxin and a variety of transition metals. Southeastern PM10 contained the highest endotoxin levels, 2-fold higher than that in northern PM10. Northern and southeastern PM2.5 contained the lowest endotoxin levels. Accordingly, southeastern PM10 was the most potent in causing secretion of the proinflammatory cytokines TNF-alpha and IL-6. All PM2.5 and PM10 samples caused cytotoxicity, but northern F`Ms were the most toxic. Cytokine secretion induced by southeastern PM10 was reduced 50-75% by rENP. These results indicate major differences in PM10 and PM2.5 PM2.5 induces cytotoxicity in vitro through an endotoxin-independent mechanism that is likely mediated by transition metals. In contrast, PM10 with relatively high levels of endotoxin induces proinflammatory cytokine release via an endotoxin-dependent mechanism MH - Mexico|Distrito Federal MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 31 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000184746600029 L2 - apoptosis;cytotoxicity;endotoxin;IL-6;interleukin-6;J774A.1 cells;Mexico City;particle composition;particulate matter;PM10;PM2.5;TNF-alpha;tumor necrosis factor-alpha;COARSE PARTICLES; FINE PM2.5; MORTALITY; APOPTOSIS; INDUCTION; CELLS SO - Environmental Health Perspectives 2003 ;111(10):1289-1293 9032 UI - 6927 AU - Osvaldo C AU - Dossenbach M AU - Tamayo JM AU - Soria D AU - Na C AU - Singh S AU - Wu KH AD - First Hosp Panamericano, Dept Psychiat, Cidra, PR, USAEli Lilly Reg Operat GesmbH, Vienna, AustriaIMSS Saltillo, Dept Psiquiatria, Saltillo, Coahuila, MexicoChung Ang Univ, Sch Med, Seoul 156756, South KoreaHosp Kota BHaru, Dept Psychiat, Kelantan, MalaysiaMcKay Mem Hosp, Taipei, Taiwan TI - Antipsychotic treatment for schizophrenia: Effects on sexual function MH - Austria MH - Malaysia MH - Mexico|Coahuila MH - South Korea MH - Taiwan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0924-977X UR - ISI:000185412300427 SO - European Neuropsychopharmacology 2003 ;13():S308-S309 9033 UI - 7342 AU - Ouattara AS AU - Assih EA AU - Thierry S AU - Cayol JL AU - Labat M AU - Monroy O AU - Macarie H AD - Univ Ouagadougou, Dept Biochim Microbiol, Unite Format & Rech Sci Vie & Terre, Ouagadougou 03, Burkina FasoUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoInst Rech Dev, Mexico City 11530, DF, MexicoUniv Provence & Mediterranee, Microbiol Lab, IRD, IFR,BAIM, F-13288 Marseille 9, FranceOuattara, AS, Univ Ouagadougou, Dept Biochim Microbiol, Unite Format & Rech Sci Vie & Terre, 03 BP 7021, Ouagadougou 03, Burkina Faso TI - Bosea minatitlanensis sp nov., a strictly aerobic bacterium isolated from an anaerobic digester AB - A strictly aerobic, mesophilic bacterium, strain AMX 51(T), was isolated from anaerobic digester sludge. Cells were Gram-negative, motile, non-sporulating, straight to curved rods with one polar flagellum. The isolate had phenotypic traits of the genus Bosea, including cellular fatty acid and substrate utilization profiles. Physiological characteristics and antibiotic susceptibility were determined. Phylogenetic analysis revealed that strain AMX 51(T) was a member of the),alpha-Proteobacteria, most closely related to Bosea thiooxidans DSM 9653(T) (similarity of 98-88%). Methylobacterium organophilum JCM 2833(T), Methylobacterium mesophilicum JCM 2829(T), Afipia clevelandensis DSM 7315(T), Afipia felis DSM 7326(T), Afipia broomeae DSM 7327(T), Blastobacter denitrificans LMG 8443(T) and Bradyrhizobiumjaponicum DSM 30131(T) showed significant 16S rRNA gene sequence similarities to strain AMX 51(T). The DNA G + C composition of strain AMX 51(T) was 68.5 mol%. DNA-DNA hybridization analysis revealed 44.2 and 15.1 % relatedness between strain AMX 51(T) and the respective type strains of Bosea thiooxidans and A. felis. Overall results suggest that strain AMX 51(T) (= DSM 1309 9(T) =ATCC 700918 (T) =Clp 106457(T)) represents a novel species of the genus Bosea; the name Bosea minatitlanensis sp. nov. is proposed MH - Burkina Faso MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000185551100004 L2 - AD-HOC-COMMITTEE; SPECIES DEFINITION; THIOSULFATE; OXIDATION SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():1247-1251 9034 UI - 7597 AU - Ovruski S AU - Schliserman P AU - Aluja M AD - UNT, CONICET, Fdn Miguel Lillo, CIRPON,FCNeIML,Inst Super Entomol, San Miguel De Tucuman, Tucuman, ArgentinaInst Ecol AC, Xalapa 91000, Veracruz, MexicoOvruski, S, UNT, CONICET, Fdn Miguel Lillo, CIRPON,FCNeIML,Inst Super Entomol, Miguel Lillo 251,T4000JFE, San Miguel De Tucuman, Tucuman, Argentina TI - Native and introduced host plants of Anastrepha fraterculus and Ceratitis capitata (Diptera : Tephritidae) in northwestern Argentina AB - Wild or commercially grown, native and exotic fruit were collected in 30 localities in the Tucuman province (NW Argentina) from January 1990 to December 1995 to determine their status as hosts of Anastrepha fraterculus (Wiedemann) and/or Ceratitis capitata (Wiedemann), the only two fruit fly species of economic and quarantine importance in Argentina. A total of 84,094 fruit (3,466.1 kg) representing 33 species (7 native and 26 exotic) in 15 plant families were sampled. We determined the following 17 host plant associations: Annona cherimola Miller (Annonaceae), Citrus paradisi Macfadyn (Rutaceae), Diospyros kaki L. (Ebenaceae), Eugenia uniflora L., Psidium guajava L., Myrcianthes pungens (Berg) Legrand (Myrtaceae), Ficus carica L. (Moraceae), Juglans australis Grisebach (juglandaceae), Mangifera indica L. (Anacardiaceae), Eriobotrya japonica (Thunb.) Lindl., Prunus anneniaca L., P. domestica L., and P. persica (L.) Batsch (Rosaceae) were infested by both A. fraterculus and C. capitata. Citrus aurantium L., Citrus reticulata Blanco, Citrus sinensis (L.) Osbeck (Rutaceae), and Passiflora caerulea L. (Passifloraceae) were only infested by Ceratitis capitata. Out of a total of 99,627 adults that emerged from pupae, 69,180 (approximate to69.5%) were Anastrepha fraterculus, 30,138 (approximate to30.2%) were C. capitata, and 309 (approximate to0.3%) were an unidentified Anastrepha species. Anastrepha fraterculus predominated in native plant species while C. capitata did so in introduced species. Infestation rates (number of larvae / kg of fruit) varied sharply from year to year and between host plant species (overall there was a significant negative correlation between fruit size and infestation level). We provide information on fruiting phenology of all the reported hosts and discuss our findings in light of their practical (e.g., management of A. fraterculus and C. capitata in citrus groves) implications MH - Argentina MH - Mexico|Veracruz PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000185018100011 L2 - tephritidae;Anastrepha fraterculus;Ceratitis capitata;host plants;Argentina;FRUIT-FLY DIPTERA; MEXICO; FLIES SO - Journal of Economic Entomology 2003 ;96(4):1108-1118 9035 UI - 6983 AU - Pacheco-Alvarez D AU - Solorzano-Vargas RS AU - Velzquez A AU - Gravel RA AU - Leon-Del-Rio A AD - Univ Nacl Autonoma Mexico, Dept Mol Biol, Mexico City 04510, DF, MexicoUniv Calgary, Dept Biochem, Calgary, AB T2N 1N4, Canada TI - A novel mechanism for the control of biotin utilization in human cells is impaired in patients with multiple carboxylase deficiency MH - Canada MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701732 SO - American Journal of Human Genetics 2003 ;73(5):465-465 9036 UI - 8039 AU - Pacheco-Cobos L AU - Rosetti M AU - Distel H AU - Hudson R AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City 04510, DF, MexicoUniv Munich, Inst Med Psychol, D-8000 Munich, GermanyHudson, R, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Apartado Postal 70228, Mexico City 04510, DF, Mexico TI - To stay or not to stay: the contribution of tactile and thermal cues to coming to rest in newborn rabbits AB - Newborn rabbits, like other altricial mammals, demonstrate thermotaxis and when placed on a thermal gradient locate and come to rest at physiologically appropriate temperatures. Little is known, however, about the sensory-motor components contributing to the in energetic terms important decision of the young to cease locomotion and come to rest. We investigated the behavior of newborn rabbits on two thermal gradients; linear in which pups could use tactile cues from the arena wall, and concentric in which pups were unable to use such cues. On both gradients pups located the warm, thermal-neutral area within the 200-s test time, thereby demonstrating their ability to orient appropriately using thermal cues alone. Unexpectedly, however, pups on the concentric gradient failed, or took significantly longer, to come to rest than pups on the linear gradient. Since the speed of locomotion of pups on the linear gradient was significantly slowed when they were in contact with the arena wall, and in most cases they came to rest in contact with it, we suggest that not only thermal but also tactile cues may be important in bringing young mammals to rest in a thermally appropriate environment MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Behavioral Sciences;Neurosciences;Physiology;Zoology U5 - J;Article AV - English IS - 0340-7594 UR - ISI:000183867700007 L2 - altricial mammals;Oryctolagus cuniculus;thermoregulation;thermotaxis;thigmotaxis;BROWN ADIPOSE TISSUE; NEW-BORN RABBIT; HEAT PRODUCTION; RAT PUPS; OXYGEN-CONSUMPTION; BODY-TEMPERATURE; BEHAVIORAL THERMOREGULATION; COLD; STIMULATION; ORIENTATION SO - Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology 2003 ;189(5):383-389 9037 UI - 8319 AU - Pacheco L AU - Moran RC AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biol Bot Estruc & Sistemat Vegetal, Mexico City 09340, DF, MexicoNew York Bot Garden, Bronx, NY 10458, USAPacheco, L, Univ Autonoma Metropolitana Iztapalapa, Dept Biol Bot Estruc & Sistemat Vegetal, Apdo Postal 55-535, Mexico City 09340, DF, Mexico TI - Lectotypification of several names currently placed in Diplazium (Woodsiaceae) AB - Lectotypifications are made for the following names that apply to species of Diplazium in the Old World: D. atratum, D. conterminum, D. crinipes, D. megophyllum, D. polypodioides var. vestitum, D. sechellorum, and D. sikkimense. The types of these names have scales with black borders and bifid marginal teeth, a scale type characteristic of the diplazioid segregate Callipteris MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER FERN SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-8444 UR - ISI:000183295700006 SO - American Fern Journal 2003 ;93(2):90-92 9038 UI - 9294 AU - Pacho D AU - Davies G AD - UMIST, Dept Chem Engn, Manchester M60 1QD, Lancs, EnglandPacho, D, UADY, Fac Ingn Quim, Av Juaraz 421,Cd Ind, Merida 97288, Mexico TI - Detection and monitoring of oil foams using raw capacitance data AB - Electrical capacitance measurements have been used to detect the presence of oil foams and study their behavior, aiming for a better understanding of these systems and leading to the development of an improved foam control methodology. With the use of electrical capacitance, it was possible to identify the air/foam and foam/liquid interfaces. It was also demonstrated that accurate monitoring of the liquid content in the foam was possible. Data from capacitance measurements were processed to obtain information on the 2-D distribution of liquid in the foam as a function of time and also to recognize the main processes taking place during foam collapse. The application of capacitance measurements to the study of foam collapse has yielded promising results that encourage its further exploitation in the development of a novel methodology of foam control MH - United Kingdom MH - Mexico|Yucatan PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000180771900024 L2 - MULTIINTERFACE LEVEL MEASUREMENT; DENSITY PROFILES; TOMOGRAPHY; PROBE SO - Industrial & Engineering Chemistry Research 2003 ;42(3):636-645 9039 UI - 6996 AU - Padilla-Lopez H AU - Vazquez MO AU - Gonzalez-Nunez R AU - Rodrigue D AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Laval, Dept Chem Engn, Quebec City, PQ G1K 7P4, CanadaUniv Laval, CERSIM, Quebec City, PQ G1K 7P4, CanadaGonzalez-Nunez, R, Univ Guadalajara, Dept Ingn Quim, Blvd Gral Marcelino Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Influence of post-extrusion parameters on the final morphology of polystyrene/high density polyethylene blends AB - The deformation of the dispersed phase in polystyrene/high density polyethylene (PS/HDPE) blends produced by ribbon extrusion was studied numerically and experimentally. A mathematical model for the deformation of the dispersed phase in ribbon extrusion processing of polymer blends was developed assuming uniaxial deformation of the ribbon and the equilibrium shapes of the dispersed particles with a pressure balance over a drop. Simulated morphologies as function of the post-extrusion parameters were obtained and compared with experiments. The analysis of the ribbon extrusion process showed that parameters such as draw ratio (DR) and ribbon-water contact length (X) significantly influence the ribbon dimensions, the extensional stress, and the stretching force. The results also showed that deformation and coalescence of the dispersed phase in the ribbon extrusion processing of polymer blends increase at higher DR and/or lower X values. The comparison between the model and the experimental morphologies of PS/HDPE produced a good agreement MH - Canada MH - Mexico|Jalisco PB - BROOKFIELD: SOC PLASTICS ENG INC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0032-3888 UR - ISI:000186490900002 L2 - INTERFACIAL-TENSION; EXTENSIONAL FLOW; DROPLET DEFORMATION; POLYMER BLENDS; VISCOUS DROP; SHEAR FLOWS; COALESCENCE; DISPERSIONS; STABILITY; BUBBLES SO - Polymer Engineering and Science 2003 ;43(10):1646-1656 9040 UI - 7663 AU - Palacios GC AU - Timmons BC AU - Eskew EK AU - Solorzano F AU - Mattingly SJ AD - IMSS, Inst Mexico Seguro Social, Ctr Med Nacl Siglo 21,Hosp Pediat, Unidad Invest Medica Epidemiol Clin, Mexico City 06725, DF, MexicoIMSS, Inst Mexico Seguro Social, Ctr Med Nacl Siglo 21, Hosp Pediat,Dept Infectol, Mexico City 06725, DF, MexicoUniv Texas, Hlth Sci Ctr, Dept Microbiol, San Antonio, TX 78229, USAPalacios, GC, IMSS, Inst Mexico Seguro Social, Ctr Med Nacl Siglo 21,Hosp Pediat, Unidad Invest Medica Epidemiol Clin, Mexico City 06725, DF, Mexico TI - Identification of the high-virulence clone of group B streptococci by using a probe containing a putative aldolase gene AB - A high-virulence clone (HVC) was proposed as causing much of the morbidity and mortality when a collection of group B Streptococcus (GBS) isolates was examined by multi-locus enzyme electrophoresis. HVC isolates could be further distinguished by their inability to grow at 40degreesC, and a temperature-sensitive aldolase was identified as responsible for this characteristic. In the present study, the HVC was sought in a collection of 57 GBS isolates by hybridization with a probe containing a putative aldolase gene on genomic DNA restriction enzyme digests. Isolates were initially classified as HVC or non-HVC by their inability to grow at 40degreesC. Three serotype III invasive isolates had the HVC control restriction/hybridization pattern. They were also unable to grow at 40degreesC. The remaining 11 invasive and all carrier isolates showed a pattern identical to that of the non-HVC control. These results provide additional support for the existence of a highly virulent clonal group among serotype III isolates and suggest that hybridization with a probe containing the aldolase gene on DNA restriction enzyme digests can be an alternative method for identifying highly virulent isolates MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000184936700010 L2 - RESTRICTION-ENDONUCLEASE ANALYSIS; INVASIVE NEONATAL DISEASE; GROWTH-CHARACTERISTICS; AGALACTIAE STRAINS; ELEVATED LEVELS; MEXICAN WOMEN; 40-DEGREES-C; ASSOCIATION; SEROTYPE; EPIDEMIOLOGY SO - Current Microbiology 2003 ;47(4):319-322 9041 UI - 9186 AU - Palomares LA AU - Joosten CE AU - Hughes PR AU - Granados RR AU - Shuler ML AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62191, Morelos, MexicoCornell Univ, Sch Chem & Biomol Engn, Ithaca, NY 14853, USACornell Univ, Boyce Thompson Inst, Ithaca, NY 14853, USAPalomares, LA, Univ Nacl Autonoma Mexico, Inst Biotecnol, AP 510-3, Cuernavaca 62191, Morelos, Mexico TI - Novel insect cell line capable of complex N-glycosylation and sialylation of recombinant proteins AB - Paucimannose or oligomannose structures are usually attached to glycoproteins produced by insect cells, while mammalian glycoproteins usually have complex glycans. The lack of complex glycosylation has limited the use of the insect cell baculovirus expression vector system (BEVS), despite its high productivity and versatility. The availability of cell lines capable of complex glycosylation can overcome such a problem and potentially increase the utility of BEVS. In this work the capability of two novel cell lines, one from Pseudaletia unipuncta (A7S) and one from Danaus plexippus (DpN1), to produce and glycosylate a recombinant protein (secreted human placental alkaline phosphatase, SeAP) was assessed. SeAP produced by Tn5B1-4 cells at a low passage number (<200) was utilized for comparison. The optimal conditions for the production of SeAP by DpN1 cells were defined, and the glycosylation profiles of SeAP produced by the cell lines were quantitatively determined. Both the A7S and the DpN1 cells produced lower concentrations of SeAP than the Tn5B1-4 cells. Less than 5% of the glycans attached to SeAP produced by the Tn5B 1-4 cells had complex forms. Glycans attached to SeAP from A7S cells contained 4% hybrid and 8% complex forms. Galactosylated biantennary structures were identified. Glycans attached to SeAP produced by the DpNl cell line had 6% hybrid and 26% complex forms. Of the complex forms in SeAP from DpN1, 13% were identified as sialylated glycans. The galactosyl-transferase activity of the three cell lines was measured and correlated to their ability to produce complex forms. Even though neither novel cell line produced as much recombinant protein as the Tn5B1-4 cells, the glycosylation of SeAP expressed by both cell lines was more complete. These novel cell lines represent interesting alternatives for the production of complex glycosylated proteins utilizing the BEVS MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 8756-7938 UR - ISI:000180973100027 L2 - BACULOVIRUS EXPRESSION SYSTEM; ALKALINE-PHOSPHATASE; DISSOLVED-OXYGEN; GLYCAN PATTERNS; FOREIGN PROTEIN; CULTURE; OLIGOSACCHARIDES; GLYCOPROTEIN; SECRETION; INFECTION SO - Biotechnology Progress 2003 ;19(1):185-192 9042 UI - 8547 AU - Palomino G AU - Dolezel J AU - Mendez I AU - Rubluo A AD - Univ Nacl Autonoma Mexico, Jardin Bot, Inst Biol, Mexico City 04510, DF, MexicoInst Expt Bot, Lab Mol Cytogenet & Cytometry, Olomouc, Czech RepublicUniv Nacl Autonoma Mexico, Inst Appl Math & Syst, Mexico City 01000, DF, MexicoPalomino, G, Univ Nacl Autonoma Mexico, Jardin Bot, Inst Biol, Mexico City 04510, DF, Mexico TI - Nuclear genome size analysis of Agave tequilana Weber AB - Flow cytometric analysis of DNA content was performed using nuclei isolated from internal basal parts of young leaves in 8 varieties of Agave tequilana. The distributions of nuclear DNA content showed that more than 85% of leaf nuclei were in G(0)/G(1) phase of the cell cycle. Nuclei with DNA content higher than 4C were not detected, indicating the absence of endopolyploidy. A. tequilana varieties lineno, azul listado, azul, moraleno, xiguin, and pata de mula were found to be diploid (2n =2x = 60). These diploid varieties displayed a 2.5% variation in 2C DNA content, which ranged from 8.304 pg for var. lineno to 8.517 pg for var. pata de mula. No statistically significant differences were detected among all diploid varieties considered. This observation demonstrates that Agave belongs to plant taxa with a stable genome size. The mean 1C(x) value (DNA amount of monoploid chromosome set x) calculated for diploid cultivars was equal to 4.202 pg DNA. Triploid var. bermejo (2n = 3x = 90) had 2C = 12.513 pg DNA, i.e. approximately three times the 1C(x) value. 2C DNA amounts of tetraploid (4x) and pentaploid (5x) var. chato were equal to 16.01 pg and 20.11 pg DNA, respectively. These values are also multiples of the 1C(x) value, indicating a relationship between ploidy level and 2C DNA content. Nevertheless, the 1C(x) values calculated for tetraploids and pentaploids were lower than the 1C(x) value determined for diploids. This observation indicates a loss of certain DNA sequences after polyploidization. The results obtained form a basis for the application of flow cytometry in taxonomy, breeding and biotechnology of Agave tequilana MH - Czech Republic MH - Mexico|Distrito Federal PB - FLORENCE: UNIV FLORENCE BOTANY INST RP - NOT IN FILE U3 - TC 4 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0008-7114 UR - ISI:000182785400004 L2 - Agave tequilana;flow cytometry;genome size variation;nuclear DNA content;FLOW CYTOMETRIC ESTIMATION; DNA CONTENT; ANGIOSPERMS; PLANTS; TAXA; MUSA SO - Caryologia 2003 ;56(1):37-46 9043 UI - 7773 AU - Palsdottir H AU - Lojero CG AU - Trumpower BL AU - Hunte C AD - Max Planck Inst Biophys, Abt Mol Membranbiol, D-60439 Frankfurt, GermanyIPN, Ctr Invest & Estudios Avanzados, Dept Bioquim, Mexico City 07360, DF, MexicoDartmouth Coll, Sch Med, Dept Biochem, Hanover, NH 03755, USAHunte, C, Max Planck Inst Biophys, Abt Mol Membranbiol, Marie Curie Str 15, D-60439 Frankfurt, Germany TI - Structure of the yeast cytochrome bc(1) complex with a hydroxyquinone anion Q(o) site inhibitor bound AB - Bifurcated electron transfer during ubiquinol oxidation is the key reaction of cytochrome bc(1) complex catalysis. Binding of the competitive inhibitor 5-n-heptyl-6- hydroxy-4,7-dioxobenzothiazole to the Q(o) site of the cytochrome bc(1) complex from Saccharomyces cerevisiae was analyzed by x-ray crystallography. This alkylhydroxydioxobenzothiazole is bound in its ionized form as evident from the crystal structure and confirmed by spectroscopic analysis, consistent with a measured pK(a) = 6.1 of the hydroxy group in detergent micelles. Stabilizing forces for the hydroxyquinone anion inhibitor include a polarized hydrogen bond to the iron-sulfur cluster ligand His(181) and on-edge interactions via weak hydrogen bonds with cytochrome b residue Tyr(279). The hydroxy group of the latter contributes to stabilization of the Rieske protein in the b-position by donating a hydrogen bond. The reported pH dependence of inhibition with lower efficacy at alkaline pH is attributed to the protonation state of His(181) with a pK(a) of 7.5. Glu(272), a proposed primary ligand and proton acceptor of ubiquinol, is not bound to the carbonyl group of the hydroxydioxobenzothiazole ring but is rotated out of the binding pocket toward the heme b(L) propionate A, to which it is hydrogen-bonded via a single water molecule. The observed hydrogen bonding pattern provides experimental evidence for the previously proposed proton exit pathway involving the heme propionate and a chain of water molecules. Binding of the alkyl-6-hydroxy-4,7-dioxobenzothiazole is discussed as resembling an intermediate step of ubiquinol oxidation, supporting a single occupancy model at the Q(o) site MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 57 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000184658800111 L2 - IRON-SULFUR PROTEIN; MITOCHONDRIAL RESPIRATORY-CHAIN; RIESKE 2FE-2S CLUSTER; ELECTRON-DENSITY MAPS; HEART BC1 COMPLEX; BOVINE HEART; UBIHYDROQUINONE OXIDATION; UBIQUINOL OXIDATION; QUINOL OXIDATION; DOMAIN MOVEMENT SO - Journal of Biological Chemistry 2003 ;278(33):31303-31311 9044 UI - 8907 AU - Pando CL AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Brescia, Dipartimento Elettron Automaz, I-25123 Brescia, ItalyPando, CL, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Induced intensity correlations in arrays of coupled Kerr waveguides AB - We study a new family of solutions of the discrete nonlinear Schrodinger equation (DNLSE), whose initial conditions are close to the resonances of a suitable area preserving map. We show that some of these DNLSE solutions are stable and live on the surface of a multidimensional torus. We study the DNLSE in the context of coupled Kerr waveguides with periodic boundary conditions. The intensity correlations of certain waveguide pairs are enhanced as the refractive index of a suitable waveguide is slightly modified. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000181589000010 L2 - NONLINEAR SCHRODINGER-EQUATION; LATTICES; BREATHERS; STABILITY; DYNAMICS SO - Physics Letters A 2003 ;309(1-2):68-74 9045 UI - 7779 AU - Pandya A AU - Arnos KS AU - Xia XJ AU - Welch KO AU - Blanton SH AU - Friedman TB AU - Sanchez GG AU - Liu XZ AU - Morell R AU - Nance WE AD - Virginia Commonwealth Univ, Med Coll Virginia, Dept Human Genet, Richmond, VA 23298, USAGallaudet Univ, Dept Biol, Washington, DC 20002, USAUniv Virginia, Genet Sect, Dept Human Genet, Charlottesville, VA 22903, USANIH, Genet Mol Lab, Natl Inst Deafness & Other Commun Disorders, Bethesda, MD 20892, USAInst Commun Humana, Lomas De Plateros, MexicoUniv Miami, Dept Otolaryngol, Miami, FL 33152, USAPandya, A, Virginia Commonwealth Univ, Med Coll Virginia, Dept Human Genet, POB 980033, Richmond, VA 23298 USA TI - Frequency and distribution of GJB2 (connexin 26) and GJB6 (connexin 30) mutations in a large North American repository of deaf probands AB - Purpose: Profound hearing loss occurs with a frequency of 1 in 1000 live births, half of which is genetic in etiology. The past decade has witnessed rapid advances in determining the pathogenesis of both syndromic and nonsyndromic deafness. The most significant clinical finding to date has been the discovery that mutations of GJB2 at the DFNB1 locus are the major cause of profound prelingual deafness in many countries. More recently, GJB2 mutations have been shown to cause deafness when present with a deletion of the GJB6 gene. We report on the prevalence of GJB2 and GJB6 mutations in a large North American Repository of DNA from deaf probands and document the profound effects of familial ethnicity and parental mating types on the frequency of these mutations in the population. Methods: Deaf probands were ascertained through the Annual Survey of Deaf and Hard of Hearing Children and Youth, conducted at the Research Institute of Gallaudet University. Educational, etiologic, and audiologic information was collected after obtaining informed consent. DNA studies were performed for the GJB2 and GJB6 loci by sequencing and PCR methods. Results: GJB2 mutations accounted for 22.2% of deafness in the overall sample but differed significantly among Asians, African-Americans and Hispanics and for probands from deaf by deaf and deaf by hearing matings, as well as probands from simplex and multiplex sibships of hearing parents. In our sample, the overall incidence of GJB2/GJB6 deafness was 2.57%. Conclusion: GJB2 mutations account for a large proportion of deafness in the US, with certain mutations having a high ethnic predilection. Heterozygotes at the GJB2 locus should be screened for the GJB6 deletion as a cause of deafness. Molecular testing for GJB2 and GJB6 should be offered to all patients with nonsyndromic hearing loss MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 30 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1098-3600 UR - ISI:000184636500005 L2 - GJB2 (connexin 26);GJB6 (connexin 30);genetic hearing loss;national DNA repository;prevalence;NONSYNDROMIC HEARING-LOSS; SENSORINEURAL DEAFNESS; RECESSIVE DEAFNESS; UNITED-STATES; GENE GJB2; FAMILIES; DFNB1 SO - Genetics in Medicine 2003 ;5(4):295-303 9046 UI - 6739 AU - Paneque A AU - Fernandez-Bertran J AU - Reguera E AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaCtr Pharmaceut Chem, Havana, CubaIPN, Sch Phys & Mat, Mexico City 07738, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, Havana 10400, Cuba TI - Solid state reactions of hemin with basic substances: Formation of bis and mixed complexes AB - The solid state reactions of hemin with KCN, Na2S . xH(2)O, arginine, imidazole, 1-methylimidazole, 2-methylimidazole, benzimidazole, and mixtures of these basic reagents were monitored using IR, Mossbauer, and XRD techniques. All these basic substances react at the peripheral propionic acid group of hemin-forming salts. Binary mixtures of KCN, arginine, imidazole, 1-methylimidazole, 2-methylimidazole, and benzimidazole were found to form complexes with mixed ligands at the iron site of hemin. According to the structural information obtained for these mixed complexes, mechanisms for their formation are proposed. The solid state synthesis and the properties of the obtained products reveal the specifities of the involved ligands MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Crystallography U5 - J;Article AV - English IS - 1040-0400 UR - ISI:000187161700002 L2 - hemin;hemin complexes;mechanochemistry;Mossbauer;infrared;MECHANOCHEMICAL REACTIONS; PROTON-TRANSFER; IMIDAZOLE; CHLORIDE; ACIDS SO - Structural Chemistry 2003 ;14(6):551-558 9047 UI - 7378 AU - Paneque A AU - Fernandez-Bertran J AU - Reguera E AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaUniv Havana, Ctr Pharmaceut Chem, Havana 10400, CubaNatl Polytech Inst, Sch Phys & Math, Mexico City, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - Mechano-chemical synthesis and spectroscopic characterization of hemin complexes with some amino acids AB - The mechano-chemical reactions of hemin with arginine (Arg), histidine (His), lysine (Lys), methionine (Met) and tryptophan (Trp) were monitored using IR and Mossbauer spectroscopies. According to IR spectra, with exception of Arg, these basic amino acids don't react at the peripheral propionic acid groups of hemin which is related with their relatively low basicity. Arg also forms a penta-coordinated complex with hemin at the iron site, as revealed by the Mossbauer spectra of the hemin-Arg milled mixtures. The hemin-Arg solid stale reaction is completed in 1:3 molar ratio suggesting that this is the stoichiometry of the formed complex. The binding of Arg to the carboxylic groups of hemin and to the central Fe(III) cation inhibits any interaction between vicinal hemin molecules, which explains the solubility and stability of the Arg-hemin complex in water. His binds iron only in basic media but, in addition, hematin is also formed. It seems that the inter- and intramolecular hydrogen bonding interactions within crystalline His limit its ability to form a complex with hemin in a solid state reaction. No complex formation at the iron site was observed with Lys, Met and Trp MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0094-5714 UR - ISI:000185542400008 L2 - hemin;amino acids;hemin complexes;arginine;Mossbauer;SUBSTITUTED IRON PORPHYRINS; CRYSTAL-STRUCTURE; MOSSBAUER-SPECTRA; AQUEOUS-SOLUTION; BINDING; AGGREGATION; ABSORPTION; ARGINATE; COMPOUND; HEMATIN SO - Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 2003 ;33(8):1405-1416 9048 UI - 8285 AU - Paneque A AU - Fernandez-Bertran J AU - Reguera E AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaCtr Pharmaceut Chem, Havana, CubaIPN, Sch Math & Phys, Mexico City, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - Spectroscopic characterization of complexes obtained by mechanochemical reactions of hemin AB - The solid state reactions of hemin with potassium acetate, KSCN, and Ag2SO4 were monitored using IR, Mossbauer and XRD techniques. These salts do not react at the peripheral propionic acid groups of hemin but form high spin complexes with hemin at the iron site. These complexes can be considered as ionic where the anions are coordinated to the metal through electrostatic interactions MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 0038-7010 UR - ISI:000183290000008 L2 - hemin;hemin complexes;mechanochemistry;Mossbauer;infrared;BETA-HEMATIN FORMATION; MALARIA PIGMENT; MOSSBAUER; IRON; MECHANISM SO - Spectroscopy Letters 2003 ;36(1-2):83-92 9049 UI - 7694 AU - Paneque M AU - Posadas CM AU - Poveda ML AU - Rendon N AU - Salazar V AU - Onate E AU - Mereiter K AD - CSIC, Inst Invest Quim, Seville 41092, SpainUniv Sevilla, Seville 41092, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca, Hidalgo, MexicoUniv Zaragoza, CSIC, ICMA, Dept Quim Inorgan, Zaragoza 50009, SpainTech Univ Vienna, Dept Chem, A-1060 Vienna, AustriaPaneque, M, CSIC, Inst Invest Quim, Avda Amer Vespucio S-N, Seville 41092, Spain TI - Formation of unusual iridabenzene and metallanaphthalene containing electron-withdrawing substituents MH - Austria MH - Mexico|Hidalgo MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000184779100004 L2 - RAY CRYSTAL-STRUCTURE; H BOND ACTIVATION; METALLABENZENE; SPECTROSCOPY; DERIVATIVES; GENERATION; REACTIVITY; COMPLEXES; EXCHANGE SO - Journal of the American Chemical Society 2003 ;125(33):9898-9899 9050 UI - 6271 AU - Paniagua R AU - Amato D AU - Vonesh E AU - Mujais S AD - IMSS, Mexico City, DF, MexicoBaxter Healthcare Corp, Div Renal, McGaw Pk, IL, USA TI - Effects of increasing dialysis prescription on residual renal function: Results from the ADEMEX trial MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219103409 SO - Journal of the American Society of Nephrology 2003 ;14():740A-740A 9051 UI - 6272 AU - Paniagua R AU - Amato D AU - Vonesh E AU - Guo A AU - Mujais S AD - IMSS, Mexico City, DF, MexicoBaxter Healthcare Corp, Div Renal, McGaw Pk, IL, USA TI - Effects of increased peritoneal clearances on patient quality of life: Results from the ADEMEX trial MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219103411 SO - Journal of the American Society of Nephrology 2003 ;14():741A-741A 9052 UI - 8405 AU - Pardo A AU - Garcia-Alvarez J AU - Ramirez R AU - Nuttall R AU - Pennington C AU - Edwards D AU - Selman M AD - Natl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv E Anglia, Sch Biol Sci, Norwich NR4 7TJ, Norfolk, EnglandInst Nacl Enfermedades Resp, Unidad Invest, Mexico City, DF, Mexico TI - Lung expression of membrane-type matrix metalloproteinases (MT-MMPs) in idiopathic pulmonary fibrosis (IPF) and hypersensitivity pneumonitis (HP) MH - United Kingdom MH - Mexico|Distrito Federal PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796900369 SO - Faseb Journal 2003 ;17(5):A832-A832 9053 UI - 9018 AU - Pardo A AU - Ruiz V AU - Arreola JL AU - Ramirez R AU - Cisneros-Lira J AU - Gaxiola M AU - Barrios R AU - Kala SV AU - Lieberman MW AU - Selman M AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoBaylor Coll Med, Dept Pathol, Houston, TX 77030, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoSelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502,Col Secc 16, Mexico City 14080, DF, Mexico TI - Bleomycin-induced pulmonary fibrosis is attenuated in gamma-glutamyl transpeptidase-deficient mice AB - To investigate repair mechanisms in bleomycin-induced pulmonary fibrosis, we used mice deficient in gamma-glutamyl transpeptidase (GGT(-/-)), a key enzyme in glutathione (GSH) and cysteine metabolism. Seventy-two hours after bleomycin (0.03 U/g), GGT-/- mice displayed a different inflammatory response to wild-type mice as judged by a near absence of neutrophils in lung tissue and bronchoalveolar lavage and a less pronounced rise in matrix metalloproteinase-9. Inflammation in GGT(-/-) mice consisted mainly of lymphocytes and macrophages. At 1 month, lungs from bleomycin-treated GGT(-/-) mice exhibited minimal areas of fibrosis compared with wild-type mice(light microscopy fibrosis index: 510 +/- 756 versus 1975 +/- 817, p < 0.01). Lung Collagen content revealed a significant increase in bleomycin-treated wild-type (15.1 +/- 3.8 versus 8.5 +/- 0.7 mug hydroxy(OH)-proline/mg dry weight, p < 0.01) but not in GGT(-/-)(10.4 +/- 1.7 versus 8.8 +/- 0.8). Control lungs from GGT(-/-) showed a significant reduction of cysteine (0.03 +/- 0.005 versus 0.055 +/- 0.001, p < 0.02) and GSH levels (1.24 +/- 0.055 versus 1.79 +/- 0.065, p < 0.002). These values decreased after 72 hours of bleomycin in both GGT-/- and wild-type but reached their respective control values after I month. Supplementation with N-acetyl cysteine partially ameliorated the effects of GGT deficiency. These findings suggest that increased neutrophils and matrix metalloproteinase-9 during the early inflammatory response and adequate thiol reserves are key elements in the fibrotic response after bleomycin-induced pulmonary injury MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 17 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000181439100020 L2 - glutathione;matrix metalloproteinase-9;neutrophils;cysteine;COLLAGEN MESSENGER-RNA; HUMAN LUNG FIBROBLASTS; EXTRACELLULAR GLUTATHIONE; BRONCHOALVEOLAR LAVAGE; NEUTROPHIL ACTIVATION; N-ACETYLCYSTEINE; RAT LUNG; EXPRESSION; INJURY; SPARC SO - American Journal of Respiratory and Critical Care Medicine 2003 ;167(6):925-932 9054 UI - 8899 AU - Parga JR AU - Shukla SS AU - Carrillo-Pedroza FR AD - Inst Technol Saltillo, Dept Met & Mat Sci, Saltillo 25000, Coahuila, MexicoLamar Univ, Dept Chem, Beaumont, TX 77710, USAUniv Autonoma Coahuila, Escuela Met, Monclova, Coahuila, MexicoParga, JR, Inst Technol Saltillo, Dept Met & Mat Sci, V Carranza 2400, Saltillo 25000, Coahuila, Mexico TI - Destruction of cyanide waste solutions using chlorine dioxide, ozone and titania sol AB - Increasingly, there are severe environmental controls in the mining industry. Because of lack of technological advances, waste management practices are severely limited. Most of the wastes in the milling industrial effluents are known to contain cyanides and it is recognized that after extraction and recovery of precious metals, substantial amounts of cyanide are delivered to tailings ponds. The toxicity of cyanide creates serious environmental problems. In this paper we describe several methods for the treatment of cyanide solutions. These include: (1) cyanide destruction by oxidation with chlorine dioxide (ClO2) in a Gas-Sparged Hydrocyclone (GSH) reactor; (2) destruction of cyanide by ozone (O-3) using a stirred batch reactor, and finally, (3) the photolysis of cyanide with UV light in presence of titania sol. In all cases excellent performance were observed as measured by the extent and of the destruction. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0956-053X UR - ISI:000181520900011 L2 - OXIDATION; WATER SO - Waste Management 2003 ;23(2):183-191 9055 UI - 8762 AU - Parra-Tabla V AU - Bullock SH AD - Univ Autonoma Yucatan, Dept Ecol, FMVZ, Merida, Yucatan, VenezuelaCICESE, Dept Ecol, Ensenada 22800, Baja California, MexicoParra-Tabla, V, Univ Autonoma Yucatan, Dept Ecol, FMVZ, Apartado Postal 4-116, Merida, Yucatan, Venezuela TI - Exploring the limiting causes of fruit production in the tropical tree Ipomoea wolcottiana Rose (Convolvulaceae) AB - Path analysis was used to evaluate a group of variables related to fruit production in the tropical tree Ipomoea wolcottiana (Convolvulaceae). The variables were tree size (trunk diameter), available phosphorus in the soil, floral phenotypic sex expression (i.e. gynoecium biomass allocation), flower production, fruits initiated, and length of the corolla and diameter of its opening. The path model explained 79.9% of the total variation, and the production of mature fruits was related in large part by the number of fruits initiated and by phenotypic sex expression. In turn, fruits initiated were related to corolla tube diameter and to a lesser extent to corolla tube length. The model could explain a low percentage of the variation (18.5%) of the number of fruits initiated, but once a fruit was initiated it had a high probability of maturing. Phenotypic sex expression related negatively to the number of flowers produced and positively, to almost the same degree, to available phosphorus in the soil. Tree size had a positive effect on flower production but a negligible effect on fruits initiated and matured. Soil phosphorus affected positively, although weakly all variables. The relationships between tree size, number of flowers and phenotypic sex expression suggested that abundant flowering in this species functions more for pollen donation than its reception MH - Mexico|Baja California MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1385-0237 UR - ISI:000182132400009 L2 - breeding systems;Convolvulaceae;path analysis;pollination;reproductive success;sexual selection;tropical dry forest;tropical tree;BREEDING SYSTEMS; RAIN-FOREST; PLANT SIZE; CYNOGLOSSUM-OFFICINALE; BIOMASS ALLOCATION; SEXUAL DIMORPHISM; FLORAL MORPHOLOGY; SEED PRODUCTION; DRY FOREST; POPULATION SO - Plant Ecology 2003 ;166(1):107-115 9056 UI - 6342 AU - Parra-Vega V AU - Arimoto S AU - Liu YH AU - Hirzinger G AU - Akella P AD - CINVESTAV, Mechatron Div, Mexico City 07000, DF, MexicoRitsumeikan Univ, Dept Robot, Kusatsu 5258577, JapanChinese Univ Hong Kong, Fac Engn, Dept Automat & Comp Aided Engn, Shatin, Hong Kong, Peoples R ChinaDLR, Inst Robot & Mechatron, D-82234 Oberpfaffenhofen, GermanySpoke Software, Palo Alto, CA 94306, USAParra-Vega, V, CINVESTAV, Mechatron Div, Mexico City 07000, DF, Mexico TI - Dynamic sliding PID control for tracking of robot manipulators: theory and experiments AB - For a class of robot arms, a proportional derivative (PD) controller plus gravity compensation yields the global asymptotic stability for regulation tasks, and some proportional-integral-derivative (PID) controllers guarantee local regulation without gravity cancellation. However, these controllers cannot render asymptotic stability for tracking tasks. In this paper, a simple decentralized continuous sliding PID controller for tracking tasks that yields semiglobal stability of all closed-loop signals with exponential convergence of tracking errors is proposed. A dynamic sliding mode without reaching phase is enforced, and terminal attractors, as well as saturated ones, are considered. A comparative experimental study versus PD control, PID control, and adaptive control for a rigid robot arm validates our design MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Robotics U5 - J;Article AV - English IS - 1042-296X UR - ISI:000188509900004 L2 - proportional-integral-derivative (PID) control;robot manipulators;sliding mode control;terminal attractors;TRAJECTORY TRACKING; PD CONTROLLER; MODE CONTROL SO - Ieee Transactions on Robotics and Automation 2003 ;19(6):967-976 9057 UI - 9007 AU - Parveen S AU - Farrah SR AU - Gonzalez-Bonilla C AU - Zamudio AV AU - Tamplin ML AD - ARS, Microbial Food Safety Res Unit, USDA, Eastern Reg Res Ctr, Wyndmoor, PA 19038, USAUniv Florida, Dept Microbiol & Cell Sci, Gainesville, FL 32611, USAUniv Maryland Eastern Shore, Food Sci & Technol Program, Princess Anne, MD 21853, USAINDRE, Mexico City, DF, MexicoTamplin, ML, ARS, Microbial Food Safety Res Unit, USDA, Eastern Reg Res Ctr, 600 E Mermaid Lane, Wyndmoor, PA 19038 USA TI - Characterization of a clinical Vibrio cholerae O139 isolate from Mexico AB - Pathogenic strains of Vibrio cholerae O139 possess the cholera toxin A subunit (ctxA) gene as well as the gene for toxin co-regulated pili (tcpA). We report the isolation of a ctxA-negative, tcpA-negative V. cholerae O139 strain (INDRE1) from a patient in Mexico diagnosed with gastrointestinal illness. Certain phenotypic characteristics of this strain were identical to those of V. cholerae O1 biotype El Tor. Unlike ctxA-positive V. cholerae O139 strains, this strain was sensitive to a wide panel of antibiotics, including ampicillin, chloramphenicol, ciprofloxacin, gentamicin, furazolidone, nalidixic acid, nitrofurantoin, tetracycline, trimethoprim-sulfamethoxazole, and streptomycin, but was resistant to polymyxin B. Ribotype and pulsed-field gel electrophoresis profiles of INDRE1 differed from those of ctxA-positive V cholerae O139 and other V. cholerae strains. Phenotypic characteristics of the Mexico strain were similar to those reported for V. cholerae O139 isolates from Argentina and Sri Lanka MH - Mexico|Distrito Federal MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000181511400009 L2 - Vibrio cholerae O139;cholera toxin;ctxA;tcpA;FIELD GEL-ELECTROPHORESIS; POLYMERASE CHAIN-REACTION; BACILLUS-GLOBISPORUS; MOLECULAR ANALYSIS; EPIDEMIC; STRAINS; BANGLADESH; BENGAL; GENE; EMERGENCE SO - Canadian Journal of Microbiology 2003 ;49(1):65-70 9058 UI - 6868 AU - Pashchenko MI AU - Lekht EE AU - Tolmachev AM AD - Sternberg Astron Inst, Moscow 119992, RussiaInst Nacl Astrpfis Opt & Elect, Puebla 72840, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Astrospace Ctr, Pushchino Radio Astron Observ, Pushchino 142290, Moscow Oblast, RussiaPashchenko, MI, Sternberg Astron Inst, Univ Skii Pr 13, Moscow 119992, Russia TI - The H2O maser toward IRAS 06308+0402 AB - We present the monitoring results for the H2O maser toward the infrared source IRAS 06308+0402 associated with a dense cold molecular cloud. The observations were carried out with the 22-m radio telescope at the Pushchino Radio Astronomy Observatory (Russia) during 1992-2003. The H2O maser was discovered in May 1992 (Pashchenko 1992) during a survey of WAS sources associated with dense cold clouds with bipolar molecular outflows. The H2O spectrum contains many emission features, suggesting the fragmentation of the envelope around a young star. The star has a low peculiar velocity relative to the CO molecular cloud (similar to2.2 km s(-1)). We found a cyclic variability of the total maser flux with a period from 1.8 to 3.1 yr. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000186827200004 L2 - interstellar medium;gaseous nebulae;stars - structure and evolution;EMISSION; REGIONS SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2003 ;29(11):731-736 9059 UI - 9311 AU - Pashchenko MI AU - Lekht EE AU - Tolmachev AM AD - Sternberg Astron Inst, Moscow 119992, RussiaInst Nacl Astrofis Opt & Electr, Tonantzintla 72840, Puebla, MexicoRussian Acad Sci, Lebedev Inst Phys, Radio Astron Stn, Pushchino 1422292, Moscow Oblast, RussiaPashchenko, MI, Sternberg Astron Inst, Univ Pr 13, Moscow 119992, Russia TI - Triplet structure of the H2O spectra in S255 AB - We analyzed the monitoring data for the maser S255 obtained in the H2O line at lambda = 1.35 cm with the 22-m radio telescope at the Pushchino Radio Astronomy Observatory in 1981-2002. The maser was most active during 1998-2002. Since 2001, the H2O spectra have been extended and complex; their triplet structure has been disrupted. The extent of the spectra was 24 km s(-1) (from -6 to 18 km s(-1)). We calculated orbital parameters for some of the components. We estimated the mass of the central star to be (6-7)M-circle dot and the outer Keplerian-disk radius to be similar to160 AU. @ 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000180726500005 L2 - radio sources;masers;interstellar medium;gaseous nebulae;MASER SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2003 ;29(1):26-30 9060 UI - 8211 AU - Pasko A AU - Okunev O AU - Savchenko V AD - Hosei Univ, Fac Comp & Informat Sci, Koganei, Tokyo 1848584, JapanUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoPasko, A, Hosei Univ, Fac Comp & Informat Sci, 3-7-2 Kajino Cho, Koganei, Tokyo 1848584, Japan TI - Minkowski sums of point sets defined by inequalities AB - The existing approaches support Minkowski sums for the boundary, set-theoretic, and ray representations of solids. In this paper, we consider the Minkowski sum operation in the context of geometric modeling using real functions. The problem is to find a real function f(3)(X) for the Minkowski sum of two objects defined by the inequalities f(1)(X) greater than or equal to 0 and f(2) (X) greater than or equal to 0. We represent the Minkowski sum as a composition of other operations: the Cartesian product, resulting in a higher-dimensional object, and a mapping to the original space. The Cartesian product is realized as an intersection in the higher-dimensional space, using an R-function. The mapping projects the resulting object along n coordinate axes, where n is the dimension of the original space. We discuss the properties of the resulting function and the problems of analytic and numeric implementation, especially for the projection operation. Finally, we apply Minkowski sums to implement offsetting and metamorphosis between set-theoretic solids with curvilinear boundaries. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Interdisciplinary Applications;Mathematics, Applied U5 - J;Article AV - English IS - 0898-1221 UR - ISI:000183601900002 L2 - shape modeling;function representation;Minkowski sum;projection;R-function;FUNCTION REPRESENTATION SO - Computers & Mathematics with Applications 2003 ;45(10-11):1479-1487 9061 UI - 9312 AU - Passot T AU - Vazquez-Semadeni E AD - UNAM, Inst Astron, Unidad Morelia, Morelia 58089, Michoacan, MexicoObserv Cote Azur, CNRS, F-06304 Nice 4, FranceVazquez-Semadeni, E, UNAM, Inst Astron, Unidad Morelia, Apdo Postal 7-32, Morelia 58089, Michoacan, Mexico TI - The correlation between magnetic pressure and density in compressible MHD turbulence AB - We study, both analytically and numerically, the behavior of magnetic pressure and density fluctuations in turbulent isothermal magnetohydrodynamic (MHD) flows in a slab geometry. We first consider "simple" MHD waves, which are the nonlinear analogue of the slow, fast and Alfven linear waves, and show that the dependence of magnetic field strength B on density rho in a simple wave depends on the mode which is considered: for the slow mode, B-2 similar or equal to c(1) - c(2)rho, while for the fast mode, B-2 similar or equal to rho(2). We also perform a perturbative analysis about a circularly-polarized plane Alfven wave to investigate Alfven wave pressure, recovering the results of McKee and Zweibel that B-2 similar or equal to rho(gammae), with gamma(e) similar or equal to 2 at large M-a, gamma(e) similar or equal to 3/2 at moderate M-a and long wavelengths, and gamma(e) similar or equal to 1/2 at low M-a. This wide variety of behaviors implies that a single polytropic description of magnetic pressure is not possible in general, but instead depends on which mode dominates the density fluctuation production. This in turn depends on the angle theta between the magnetic field and the direction of wave propagation and on the Alfvenic Mach number M-a. Typically, at small M-a, the slow mode dominates, and B is anticorrelated with rho. At large M-a, both modes contribute to density fluctuation production, and the magnetic pressure decorrelates from density, exhibiting a large scatter, which however decreases towards higher densities. In this case, magnetic "pressure" does not act as a restoring force, but rather as a random forcing. These results have implications for the probability density function (PDF) of mass density. The non-systematic behavior of the magnetic pressure causes the PDF to maintain the log-normal shape corresponding to non-magnetic isothermal turbulence, except in cases where the slow mode dominates, in which the PDF develops an excess at low densities because the magnetic "random forcing" becomes density-dependent. Our results are consistent with the low values and apparent lack of correlation between the magnetic field strength and density in surveys of the lower-density molecular gas, and also with the recorrelation apparently seen at higher densities, if the Alfvenic Mach number is relatively large there MH - France MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000180637800010 L2 - magnetohydrodynamics;turbulence;MOLECULAR CLOUDS; PROBABILITY-DISTRIBUTION; HYDROMAGNETIC-WAVES; DARK CLOUDS SO - Astronomy & Astrophysics 2003 ;398(3):845-855 9062 UI - 7354 AU - Paternain GP AU - Petean J AD - Univ Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WB, EnglandCIMAT, Guanajuato 36000, MexicoPaternain, GP, Univ Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WB, England TI - The pressure of Ricci curvature AB - Let (M-n; g) be a closed Riemannian manifold and let k(0) be any positive upper bound for the sectional curvature. We prove that P(r(g)/2rootk(0)) less than or equal to n-1/2 rootk(0), where P(f) stands for the topological pressure of a function f on the unit sphere bundle SM and r(g)(v) is the Ricci curvature in the direction of v is an element of SM. This result gives rise to several estimates for the various entropies of the geodesic flow which in turn have several consequences. One of them is entropy rigidity for those metrics in a hyperbolic manifold whose normalized total scalar curvature is bigger than that of the hyperbolic metric MH - United Kingdom MH - Mexico|Guanajuato PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0046-5755 UR - ISI:000185537900006 L2 - topological pressure;Ricci curvature;entropy rigidity;NEGATIVE CURVATURE; GEODESIC-FLOWS; ENTROPY; MANIFOLDS; SPACES SO - Geometriae Dedicata 2003 ;100(1):93-102 9063 UI - 9238 AU - Paternain GP AU - Petean J AD - Univ Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WB, EnglandCIMAT, Guanajuato 36000, Gto, MexicoPaternain, GP, Univ Cambridge, Dept Pure Math & Math Stat, 16 Mill Lane, Cambridge CB3 0WB, England TI - Minimal entropy and collapsing with curvature bounded from below AB - We show that if a closed manifold M admits an F-structure (not necessarily polarized, possibly of rank zero) then its minimal entropy vanishes. In particular, this is the case if M admits a non-trivial S-1 -action. As a corollary we obtain that the simplicial volume of a manifold admitting an F-structure is zero. We also show that if M admits an F-structure then it collapses with curvature bounded from below. This in turn implies that M collapses with bounded scalar curvature or, equivalently, its Yamabe invariant is non-negative. We show that F-structures of rank zero appear rather frequently: every compact complex elliptic surface admits one as well as any simply connected closed 5-manifold. We use these results to study the minimal entropy problem. We show the following two theorems: suppose that M is a closed manifold of S-4, Cp-2 CP2, S-2 X S-2 obtained by taking connected sums of copies CP and the K3 surface. Then M has zero minimal entropy. Moreover, M admits a smooth Riemannian metric with zero topological entropy if and only if M is diffeomorphic to S-4, Cp-2 S-2 x S-2, Cp-2 CP2 or Cp-2 Cp-2. Finally, suppose that M is a closed simply connected 5-manifold. Then M has zero minimal entropy. Moreover, M admits a smooth Riemannian metric with zero topological entropy if and only if M is diffeomorphic to S-5, S-3 x S-2, the nontrivial S-3-bundle over S-2 or the Wu-manifold SU(3)/SO(3) MH - United Kingdom MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Mathematics U5 - J;Article AV - English IS - 0020-9910 UR - ISI:000180906900006 L2 - TOPOLOGICAL-ENTROPY; GEODESIC-FLOWS; MANIFOLDS; SPACES; 4-MANIFOLDS SO - Inventiones Mathematicae 2003 ;151(2):415-450 9064 UI - 8205 AU - Patino F AU - Cruells M AU - Roca A AU - Salinas E AU - Perez M AD - Univ Barcelona, Dept Engn Quim & Met, E-08028 Barcelona, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Mat & Met, Pachuca 42081, Hidalgo, MexicoRoca, A, Univ Barcelona, Dept Engn Quim & Met, Marti Franques 1, E-08028 Barcelona, Spain TI - Kinetics of alkaline decomposition and cyanidation of argentian ammonium jarosite in lime medium AB - The alkaline decomposition of argentian ammonium jarosite in lime medium is characterized by an induction period and a conversion period in which the sulfate and ammonium ions pass to the solution whereas calcium is incorporated in the residue jointly with iron; this residue is amorphous in nature. The process is chemically controlled and the order of reaction with respect to the hydroxide concentration is 0.4; the activation energy is 70 U mol(-1). Cyanidation of argentian ammonium jarosite in lime medium presents the same reaction rate in the range of 0-10.2 mol m(-3) CN-; in this range of concentration, the cyanide process can be described, as in other jarosites, in a two-step process: a step of alkaline decomposition that controls the overall process followed by a fast step of silver complexation. For higher cyanide concentration, the order of reaction with respect to cyanide is 0.65, and kinetic models of control by chemical reaction and diffusion control through the products layer both fit well; the activation energy obtained is 29 U mol(-1); this is indicative of a mixed control of the cyanidation process in the experimental conditions employed. The process is. faster than was observed in ammonium jarosite generated in zinc hydrometallurgy (Industrial Minera Mexico, San Luis Potosi, Mexico); it seems that the reaction rate decreases when the substitution level in the jarosite lattice increases; this behavior is similar to that observed for synthetic potassium jarosite and arsenical potassium jarosite from gossan ores (Rio Tinto, Spain) presented in a previous paper. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0304-386X UR - ISI:000183677300014 L2 - ammonium jarosite;cyanidation;kinetics;alkaline decomposition;TINTO GOSSAN ORES; PRECIPITATION SO - Hydrometallurgy 2003 ;70(1-3):153-161 9065 UI - 7686 AU - Patrykiejew A AU - Pizio O AU - Pusztai L AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoHungarian Acad Sci, Inst Solid State Phys & Opt, Budapest, HungarySokolowski, S, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Effects of slit-like pore confinement on the closed loop immiscibility in symmetric binary model mixtures: fundamental measure density functional approach AB - We investigate the adsorption of model symmetric binary mixtures, exhibiting closed loop immiscibility in the bulk phase, in slit-like pores by using a density functional approach. Our focus is on changes in the closed loop phase diagram owing to confinement. We have found that, in general, confinement narrows immiscibility loops in the temperature-selectivity plane MH - Hungary MH - Mexico|Distrito Federal MH - Poland PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000184808400008 L2 - DIRECTIONAL ATTRACTIVE FORCES; ASSOCIATING FLUIDS; PHASE-EQUILIBRIA; GIBBS ENSEMBLE; SIMULATION; MOLECULES SO - Molecular Physics 2003 ;101(14):2219-2223 9066 UI - 7951 AU - Patrykiejew A AU - Salamacha L AU - Sokolowski S AU - Pizio O AD - Marie Curie Sklodowska Univ, Fac Chem, PL-20031 Lublin, PolandUNAM, Inst Quim, Mexico Distinto Fed, MexicoPatrykiejew, A, Marie Curie Sklodowska Univ, Fac Chem, PL-20031 Lublin, Poland TI - Wetting behavior of associating binary mixtures at attractive walls: A lattice Monte Carlo study AB - The lattice gas model is used to study the effects of molecular association on the wettability of surfaces with attractive walls by binary symmetric associating mixtures. The model assumes that the adsorbate particles occupy a regular cubic lattice of sites and that the interactions between adsorbate particles involve only the first nearest neighbors. The energies of interaction between the pairs of like particles are the same, while the only interaction between a pair of unlike particles is due to association. Only the formation of dimers is allowed and the energy of association is finite. The particles are subject to the surface, van der Waals-like potential, assumed to be the same for both components. The model is studied with the help of the Monte Carlo simulation method in the grand canonical ensemble. Only the ground state properties are treated analytically. It is demonstrated that, in general, molecular association hinders wetting. In particular, in the systems with nonzero wetting temperature, the increase of the association energy leads to the increase of the wetting temperature and for sufficiently high energy of association the mixture does not wet the surface at all. When the system is expected to exhibit complete wetting at the ground state, the film formed by strongly associating mixtures wets the surface only at sufficiently low temperatures, below the dewetting temperature. It is demonstrated that the dewetting temperature increases with the strength of the surface potential as well as with the increase of the association energy MH - Mexico|Distrito Federal MH - Poland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000184081000051 L2 - MIXED MULTILAYER ADSORPTION; SLIT-LIKE PORES; LAYERING TRANSITIONS; NONIDEAL MIXTURES; LIQUID-MIXTURE; SIMULATION; MOLECULES; SYSTEMS; FORCES SO - Physical Review e 2003 ;67(6): 9067 UI - 8767 AU - Patrykiejew A AU - Salamacha L AU - Sokolowski S AU - Dominguez H AU - Pizio O AD - Marie Curie Sklodowska Univ, Fac Chem, PL-20031 Lublin, PolandUNAM, Inst Quim, Mexico City, DF, MexicoPatrykiejew, A, Marie Curie Sklodowska Univ, Fac Chem, PL-20031 Lublin, Poland TI - Phase behavior of lattice associating binary mixtures: A Monte Carlo study AB - The lattice gas model is used to study effects of molecular association on the phase behavior of binary symmetric mixtures, in which only dimers consisting of different particles can form. It is demonstrated that the increase of the association energy leads to qualitative changes of the phase diagrams. In particular, the demixing transition is observed only for sufficiently low association energy. That demixing transition can be either first order or continuous. For sufficiently high energy of association the condensed phase shows a very well ordered structure even at high temperatures MH - Mexico|Distrito Federal MH - Poland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000182020700015 L2 - DIRECTIONAL ATTRACTIVE FORCES; MULTIPLE BONDING SITES; THERMODYNAMIC PROPERTIES; ASYMMETRIC MODEL; LIQUID-MIXTURES; FLUIDS; MOLECULES; DIAGRAMS; TRANSITIONS; EQUILIBRIA SO - Physical Review e 2003 ;67(3): 9068 UI - 7623 AU - Patterson RM AU - Vega-Lloyo L AU - Trouba KJ AU - Teague JA AU - Germolec DR AD - NIEHS, LMT, Res Triangle Pk, NC 27709, USACINVESTAV, Natl Polytech Inst, Mexico City 14000, DF, Mexico TI - Arsenic-induced alterations in contact hypersensitivity MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518501835 SO - Toxicological Sciences 2003 ;72():376-377 9069 UI - 7207 AU - Pavlov ST AU - Lang IG AU - Korovin LI AD - UAZ, Escuela Fis, Zacatecas 98060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, RussiaRussian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaPavlov, ST, UAZ, Escuela Fis, Apartado Postal C-580, Zacatecas 98060, Mexico TI - An analog of the Kubo formula for conductivity of spatially inhomogeneous media in spatially inhomogeneous electric fields AB - The average densities of currents and charges induced by a weak electromagnetic field in spatially inhomogeneous systems at a finite temperature are calculated. The Kubo formula for the electrical conductivity tensor is generalized to spatially inhomogeneous systems and spatially inhomogeneous fields. The contributions containing electric fields and derivatives of the fields with respect to coordinates are separated. It is shown that semiconductor quantum wells, wires, and dots can be treated as spatially inhomogeneous systems. (C) 2003 MAIK "Nauka / Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000185866000026 L2 - LIGHT-SCATTERING; GENERAL-THEORY; QUANTUM-WELLS; EXCITONS SO - Physics of the Solid State 2003 ;45(10):2001-2011 9070 UI - 8555 AU - Pavon JLP AU - Sanchez MD AU - Pinto CG AU - Laespada MEF AU - Cordero BM AU - Pena AG AD - Univ Salamanca, Fac Ciencias Quim, Dept Quim Analitica Nutr & Bromatol, Salamanca 37008, SpainLab Suelos Plantas & Aguas, Supera Anuies, MexicoPavon, JLP, Univ Salamanca, Fac Ciencias Quim, Dept Quim Analitica Nutr & Bromatol, Salamanca 37008, Spain TI - A method for the detection of hydrocarbon pollution in soils by headspace mass spectrometry and pattern recognition techniques AB - In the present work, we report a methodology for the rapid detection of soil pollution by hydrocarbons that is based on direct coupling of a headspace sampler with a mass spectrometer. With no prior treatment, the samples are subjected to the headspace generation process and the volatiles generated are introduced directly into the mass spectrometer, thereby obtaining a fingerprint of the sample analyzed. The mass spectrum corresponding to the mass/charge ratios (m/z) ranging between 49 and 160 atomic mass units (amu) contains the information related to the composition of the headspace and is used as the analytical signal for the characterization of the samples. Chemometric treatments, such as hierarchical cluster analysis (HCA), linear discriminant analysis (LDA), and soft independent modeling class analogy (SIMCA) were used to characterize the different types of samples analyzed. The main advantage of the proposed methodology is that no prior chromatographic separation and no sample manipulation are required. The method is rapid, simple, and in view of the results, highly suitable for detecting pollution in soils polluted by hydrocarbons MH - Mexico|Tabasco MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2700 UR - ISI:000182662800022 L2 - SOLID-PHASE MICROEXTRACTION; TOTAL PETROLEUM-HYDROCARBONS; OIL-SPILL; IDENTIFICATION; CONTAMINATION; CHEESES SO - Analytical Chemistry 2003 ;75(9):2034-2041 9071 UI - 8993 AU - Paz H AU - Martinez-Ramos M AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoUniv Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106, USAPaz, H, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Seed mass and seedling performance within eight species of Psychotria (Rubiaceae) AB - Large seeds have been hypothesized to confer survival advantages in the shaded forest, and small seeds to confer growth advantages in open habitats. We explored these hypotheses using experimental studies in both field and controlled conditions. Our experiments examined intraspecific effects of seed mass on seedling demography in eight sympatric woody species of Psychotria. We compared the effects of seed mass on seedling size (biomass), maximum relative growth rate (RGR), the proportion of emerged seedlings that survived until one year of age, and the proportion of Sown seeds reaching the stage of one-year-old seedlings in gaps compared with shaded rain forest habitats, as well as in contrasting greenhouse, light conditions. For each species, seeds were classified into four seed mass categories and introduced to three pairs of shaded forest gap sites. In the greenhouse, emerged seedlings from different seed mass categories were grown in contrasting light environments. A positive effect of seed mass on seedling survival was observed in six of seven species in the shaded forest but only in two species in gaps. Final seedling biomass was positively related to seed mass in five species in the shaded forest, but only in two species in gaps. In some species,RGR decreased with seed mass. Consequently, the biomass achieved by small-seeded seedlings with relatively fast growth rates was similar to that of seedlings derived from large seeds. The probability of recruitment increased with seed mass in four of seven species in the shaded forest, but only in two species in gaps. Negative effects of seed mass on recruitment occurred only in one species, and only in gaps. The positive effects of seed mass on seedling biomass and survival observed under shaded greenhouse conditions were weaker than those observed in the shaded forest. Overall, our results indicate that: (1) seed mass influences recruitment in natural forest habitats, (2) larger seeds confer higher probability of recruitment in the shaded forest by producing seedlings with larger size and higher probability of survival, and (3) in natural habitats ecological factors in addition to light (e.g., seed predators) operated selectively on seedlings emerging from seeds differing in mass MH - Mexico|Michoacan MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 18 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000181482600017 L2 - life histories;Los Tuxtlas;Mexico;Psychotria;Rubiaceae;seedling demography;seed mass;seed size variation;shade tolerance;tropical rain forest;RELATIVE GROWTH-RATE; PHYLOGENETICALLY INDEPENDENT CONTRASTS; RAIN-FOREST; SHADE-TOLERANCE; TROPICAL TREES; LIGHT REQUIREMENTS; WOODY-PLANTS; DEEP SHADE; SIZE; ESTABLISHMENT SO - Ecology 2003 ;84(2):439-450 9072 UI - 8386 AU - Pecchi G AU - Reyes P AU - Lopez T AU - Gomez R AU - Moreno A AU - Fierro JLG AU - Martinez-Arias A AD - Concepcion Univ, Fac Ciencias Quim, Concepcion, ChileUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoCSIC, Inst Catalisis & Petr Quim, Madrid 28049, SpainPecchi, G, Concepcion Univ, Fac Ciencias Quim, Casilla 160, Concepcion, Chile TI - Catalytic combustion of methane on Fe-TiO2 catalysts prepared by sol-gel method AB - Two different series of titania-supported iron catalysts prepared by the sol-gel method have been characterised and tested in the combustion of methane at atmospheric pressure. In each series, the effect of metal loading (1, 5 and 10 wt%) and gelation pH (3 and 9) were studied. Characterisation data of calcined catalysts, carried out by specific area measurement, TPR, X-ray diffraction, XPS and EPR revealed no significant changes in metal dispersion. The catalytic activity of the solids were evaluated in the combustion of methane under stoichiometric mixture of CH4/O-2 from 473 K up to the temperature required for total combustion. The best performance was shown by catalysts having 5 wt.%, which is ascribed to a balance of factors like the presence of a sufficient concentration of iron at the surface, achievement of relatively high dispersion state for iron and the presence of Fe+3 ions incorporated to the lattice of titania MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0928-0707 UR - ISI:000182923000012 L2 - iron catalysts;sol-gel;combustion;methane;Fe3+-EPR;METAL-SUPPORT INTERACTIONS; CO-H2 SYNTHESIS REACTIONS; STRUCTURAL CHARACTERIZATION; TITANIA POWDERS; IRON; TIO2; PALLADIUM; NANOPARTICLES; RESONANCE; COMPLEXES SO - Journal of Sol-Gel Science and Technology 2003 ;27(2):205-214 9073 UI - 8910 AU - Pech-Pacheco JL AU - varez-Borrego J AU - Cristobal G AU - Keil MS AD - CSIC, Inst Opt, Dept Opt, E-28006 Madrid, SpainCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Dept Opt, Ensenada, Baja California, MexicoPech-Pacheco, JL, CSIC, Inst Opt, Dept Opt, Serrano 121, E-28006 Madrid, Spain TI - Automatic object identification irrespective of geometric changes AB - We present a new approach to achieve object identification based on the use of phase correlation in the scale transform domain for automatic character recognition. The results are extensible to other fields. The proposed method is shown to be invariant to translation, rotation, and scale. We extended the methodology used by Casasent and Psaltis by considering a more efficient digital scale transform as an alternative to the Fourier-Mellin techniques. To improve the discriminative power, we introduce a new template matching based on the use of a modified weighted log-polar spectrum. The correlations have been calculated by using phase-only filters (POF) in a digital system. The proposed method is able to provide discrimination between scale and rotation in images to facilitate image registration. (C) 2003 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Spain PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000181531500034 L2 - scale transform;image processing;invariant correlation function;FILTERS; ROTATION SO - Optical Engineering 2003 ;42(2):551-559 9074 UI - 7650 AU - Pedersen DB AU - Simard B AU - Martinez A AU - Moussatova A AD - Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, CanadaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPedersen, DB, Natl Res Council Canada, Steacie Inst Mol Sci, 100 Sussex Dr, Ottawa, ON K1A 0R6, Canada TI - Stabilization of an unusual tautomer of guanine: Photoionization of Al-guanine and Al-guanine-(NH3)(n) AB - Photoionization efficiency spectra of gas-phase Al-guanine-(NH3)(n), 0 less than or equal to n less than or equal to 2, have been measured in the 210-270 nm range. Within error the ionization energies, 4.65 +/- 0.08, 4.6 +/- 0.1, and 4.5 +/- 0.2 eV for n = 0, 1, and 2, respectively, are equivalent. This result is explained in terms of molecular geometries in which NH3 associates with the guanine constituent of Al-guanine specifically. The onset of signal in the Al-guanine photoionization efficiency spectrum is found to shift from 5.6 +/- 0.1 to 4.65 +/- 0.08 eV upon introduction of NH3 to the He carrier gas. The shift is indicative of formation of vastly different amounts of distinct isomers of Al-guanine in the presence or absence of NH3. The geometries, ionization energies, and heats of formation of the isomers have been determined using DFT calculations benchmarked against the experimental ionization energies. The most stable isomer is one of an Al atom complexed to an unusual tautomer of guanine in which, effectively, a proton has been transferred from the six-membered ring to the five-membered ring. To our knowledge, this is the first demonstration of the existence of this tautomer of guanine MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000184856000018 L2 - AB-INITIO CALCULATIONS; NUCLEIC-ACID BASES; HYDROGEN-BONDED COMPLEXES; PROTON-TRANSFER; METAL-CATIONS; HARTREE-FOCK; GAS-PHASE; DNA; CYTOSINE; ENERGY SO - Journal of Physical Chemistry A 2003 ;107(33):6464-6469 9075 UI - 8013 AU - Pelant J AU - Tkachenko MG AU - Tkachuk VV AU - Wilson RG AD - Acad Sci Czech Republ, Inst Math, CR-11567 Prague, Czech RepublicUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoPelant, J, Acad Sci Czech Republ, Inst Math, Zitna 25, CR-11567 Prague, Czech Republic TI - Pseudocompact Whyburn spaces need not be Frechet AB - We prove in ZFC that there exists a Tychonoff pseudocompact scattered AP-space of uncountable tightness. We give some sufficient and necessary conditions for a P-space to be AP as well as a characterization of AP-property in linearly ordered topological spaces MH - Czech Republic MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000183811000037 L2 - Whyburn space;weakly Whyburn space;AP-space;WAP-space;pseudocompact space;countably compact space;scattered space;Lindelof P-space;linearly ordered space SO - Proceedings of the American Mathematical Society 2003 ;131(10):3257-3265 9076 UI - 8847 AU - Pelayo C AU - Vilas-Boas EVD AU - Benichou M AU - Kader AA AD - Univ Calif Davis, Dept Pomol, Davis, CA 95616, USAUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340 2, DF, MexicoUniv Fed Lavras, Dept Ciencia Alimentos, BR-37200000 Lavras, MG, BrazilCadi Ayyad Univ, Dept Biol, Marrakech 2390, MoroccoUniv Calif Davis, Dept Pomol, Davis, CA 95616, USAKader, AA, Univ Calif Davis, Dept Pomol, 1 Shields Ave, Davis, CA 95616 USA TI - Variability in responses of partially ripe bananas to 1-methylcyclopropene AB - The effect of 1-methylcyclopropene (1-MCP) was evaluated on bananas at intermediate stages of ripeness after 36-48 h of having been commercially treated with ethylene. Several conditions for the application of 1-MCP including concentrations (100, 300 and 1000 nl l(-1) ),temperatures (14 and 20 degreesC) and durations of exposure (6, 12 and 24 h) were studied. In some experiments, bananas at ripeness stage 3 or 4 that were treated with 1000 nl l(-1) 1-MCP at 20 degreesC for 6 or 24 h had higher ethylene production rates but respiration rates were reduced and changes in skin color and flesh firmness were delayed without negative impacts on the qualitative or quantitative aroma composition of the fruit. However, similar 1-MCP treatments were much less effective in retarding ripening of stage 3 or 4 bananas in subsequent experiments. We conclude that, under the conditions tested in this study, the efficacy of 1-MCP in delaying ripening of partially ripened bananas is too inconsistent for commercial application. (C) 2002 Elsevier Science B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Morocco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Agronomy;Food Science & Technology;Horticulture U5 - J;Article AV - English IS - 0925-5214 UR - ISI:000181794300007 L2 - ACC oxidase;ACC synthase;aroma compounds;color;ethylene;firmness;respiration;ACC OXIDASE; ETHYLENE; FRUIT; SYNTHASE; PROTEIN SO - Postharvest Biology and Technology 2003 ;28(1):75-85 9077 UI - 8396 AU - Pelsman A AU - Hoyo-Vadillo C AU - Gudasheva TA AU - Seredenin SB AU - Ostrovskaya RU AU - Busciglio J AD - Univ Connecticut, Ctr Hlth, Dept Neurosci, Farmington, CT 06030, USACINVESTAV, Div Pharmacol, Mexico City 07360, DF, MexicoRussian Acad Med Sci, Inst Pharmacol, Moscow 125315, RussiaBusciglio, J, Univ Connecticut, Ctr Hlth, Dept Neurosci, 263 Farmington Ave, Farmington, CT 06030 USA TI - GVS-111 prevents oxidative damage and apoptosis in normal and Down's syndrome human cortical neurons AB - The neuroprotective activity of a novel N-acylprolyl-containing dipeptide analog of the nootropic 2-oxo-1-pyrrolidine acetamide (Piracetam) designated as GVS-111 (DVD-111/Noopept) was tested in two in vitro models of neuronal degeneration mediated by oxidative stress: normal human cortical neurons treated with H2O2, and Down's syndrome (DS) cortical neurons. Incubation of normal cortical neurons with 50 muM H2O2 for 1 h resulted in morphological and structural changes consistent with neuronal apoptosis and in the degeneration of more than 60% of the neurons present in the culture. GVS-111 significantly increased neuronal survival after H2O2-treatment displaying a dose-dependent neuroprotective activity from 10 nM to 100 muM, and an IC50 value of 1.21 +/- 0.07 muM. GVS-111 inhibited the accumulation of intracellular free radicals and lipid peroxidation damage in neurons treated with H2O2 or FeSO4, suggesting an antioxidant mechanism of action. GVS-111 exhibited significantly higher neuroprotection compared to the standard cognition enhancer Piracetam, or to the antioxidants Vitamin E, propyl gallate and N-tert-butyl-2-sulpho-phenylnitrone (s-PBN). In DS cortical cultures, chronic treatment with GVS-111 significantly reduced the appearance of degenerative changes and enhanced neuronal survival. The results, suggest that the neuroprotective effect of GVS-111 against oxidative damage and its potential nootropic activity may present a valuable therapeutic combination for the treatment of mental retardation and chronic neurodegenerative disorders. (C) 2003 ISDN. Published by Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Developmental Biology;Neurosciences U5 - J;Article AV - English IS - 0736-5748 UR - ISI:000182965300001 L2 - Alzheimer's disease;Down's syndrome;oxidative stress;lipid peroxidation;neuroprotection;neurodegeneration;GVS-111;dipeptides;PROLINE-CONTAINING DIPEPTIDE; BETA-PEPTIDE TOXICITY; AMYLOID-BETA; ALZHEIMERS-DISEASE; HIPPOCAMPAL-NEURONS; PIRACETAM; PROTEIN; STRESS; PHOSPHATIDYLSERINE; NEUROTOXICITY SO - International Journal of Developmental Neuroscience 2003 ;21(3):117-124 9078 UI - 8714 AU - Pena-Ramos EA AU - Xiong YLL AD - Univ Kentucky, Dept Anim Sci, Food Sci Sect, Lexington, KY 40546, USACtr Invest Alimentac & Desarrollo AC, Anim Derived Food Dept, Hermosillo 83000, Sonora, MexicoXiong, YLL, Univ Kentucky, Dept Anim Sci, Food Sci Sect, 206 Garrigus Bldg, Lexington, KY 40546 USA TI - Whey and soy protein, hydrolysates inhibit lipid oxidation in, cooked pork patties AB - Pork patties containing 1.5% NaCl and 2% hydrolyzed whey protein isolate (WPI, 1 h with flavourzyme or 6 h with protamex) or soy protein isolate (SPI, 0.5 h with chymotrypsin or flavourzyme) were cooked to 70 degreesC and subsequently stored at 4 degreesC up to 7 days. Lipid oxidation in patties during storage was analyzed by measuring the concentration of conjugated dienes (CD) and thiobarbituric acid-reactive substances (TBARS). Intact WPI and SPI, and their hydrolysates, were all inhibitory of oxidation (P < 0.05) in cooked patties, with SPI being slightly more effective than WPI. Hydrolysis with protamex augmented the antioxidative activity (CD, TBARS) of WPI. Hydrolysis with either chymotrypsin or flavourzyme improved the ability of SPI to retard CD formation but did not delay the production of TBARS in stored pork patties. (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Sonora PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 15 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0309-1740 UR - ISI:000182094400004 L2 - soy protein;whey protein;hydrolysates;antioxidants;pork meat;lipid oxidation;ANTIOXIDANT ACTIVITY; NATURAL ANTIOXIDANTS; PLANT-EXTRACTS; MEAT-PRODUCTS; BEEF PATTIES; GROUND PORK; FOOD SO - Meat Science 2003 ;64(3):259-263 9079 UI - 6661 AU - Pena M AU - Hamann WR AU - Ruiz MT AD - UNAM, Inst Astron, Mexico City, DF, MexicoUniv Potsdam, Lehrstuhl Astrophys, Potsdam, GermanyUniv Chile, Dept Astron, Santiago, ChilePena, M, UNAM, Inst Astron, Mexico City, DF, Mexico TI - The LMC planetary nebula N66 revisited: Nebular kinematics and stellar models MH - Chile MH - Germany MH - Mexico|Distrito Federal PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article AV - English IS - 0074-1809 UR - ISI:000187344400184 SO - Planetary Nebulae: Their Evolution and Role in the Universe 2003 ;(209):579-580 9080 UI - 8527 AU - Penagos DI AU - Magallanes R AU - Valle J AU - Cisneros J AU - Martinez AM AU - Goulson D AU - Chapman JW AU - Caballero P AU - Cave RD AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoFac Ciencias Agricolas, UNACH, Huehuetan, Chiapas, MexicoUniv Southampton, Dept Biol, Harpenden SO16 7PX, Herts, EnglandIACR Rothamsted, Plant & Invertebrate Ecol Div, Harpenden AL5 2JQ, Herts, EnglandUniv Publ Navarra, Dept Prod Agraria, E-31006 Pamplona, SpainEscuela Agricola Panamer, El Zamorano, HondurasWilliams, T, ECOSUR, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Effect of weeds on insect pests of maize and their natural enemies in Southern Mexico AB - A pilot study performed on the Pacific coastal plain of Chiapas, Mexico, focused on the prevalence of maize crop infestation by insect pests, parasitism of pests and the abundance of insect predators in maize plots with weeds compared with plots under a regime of rigorous manual weed control. Sampling was conducted on four occasions at 20, 32, 44 and 56 days post-planting. Infestation of maize by fall armyworm larvae, Spodoptera frugiperda (Lepidoptera: Noctuidae), was more than twice as great in plots with strict weed control compared with weedy plots at 20 days post-planting, but declined thereafter in both treatments. The prevalence of aphid infestation and the abundance of nitidulid beetles were consistently greater in weed-controlled plots. In contrast, the density of beneficial predatory Coleoptera increased significantly in plots with weeds, and it is suggested that this probably explains the lower incidence of pests. S. frugiperda egg masses placed in experimental plots suffered a significantly higher incidence rate of parasitism by Chelonus insularis (Hymenoptera: Braconidae) in clean plots (42.0%) compared with those placed in weedy plots (3.75%); it is suspected that weeds may hinder the location of egg masses by parasitoids. Overall, the presence or absence of weeds had a marked influence on the arthropod community present in maize fields. The weeds did not affect maize plant height, the levels of plant damage or the yield of grain from plants under each type of weed regime, implying that competitive effects of weeds may be offset by greater numbers of beneficial insects in weedy plots. Our pilot study indicates that strict weed control in maize may be unnecessary MH - United Kingdom MH - Honduras MH - Mexico|Chiapas MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0967-0874 UR - ISI:000182720200010 L2 - maize;non-crop vegetation;insect pests;natural enemies;Mexico;SPODOPTERA-FRUGIPERDA; PURPLE NUTSEDGE; LATIN-AMERICA; LEPIDOPTERA; NOCTUIDAE; ABUNDANCE; COMPETITION; MANAGEMENT; ARTHROPODS; COLEOPTERA SO - International Journal of Pest Management 2003 ;49(2):155-161 9081 UI - 6982 AU - Penchaszadeh VB AU - Giraldo A AU - Giugliani R AU - Kofman S AD - Beth Israel Med Ctr, WHO, Collab Ctr Community Genet, New York, NY 10003, USANatl Univ Colombia, Sch Med, Genet Inst, Bogota, ColombiaFed Univ RGS, Dept Med Genet, Porto Alegre, RS, BrazilGen Hosp, Dept Genet, Mexico City, DF, Mexico TI - Cooperation in medical genetics in Latin America MH - Brazil MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701392 SO - American Journal of Human Genetics 2003 ;73(5):408-408 9082 UI - 7160 AU - Peniche C AU - rguelles-Monal W AU - Peniche H AU - Acosta N AD - Univ La Habana, Ctr Biomat, Havana 10400, CubaCIAD, Unidad Guaymas, Guaymas 85480, Sonora, MexicoPeniche, C, Univ La Habana, Ctr Biomat, Havana 10400, Cuba TI - Chitosan: An attractive biocompatible polymer for microencapsulation AB - Chitosan is a weak cationic polysaccharide composed essentially of beta(1 --> 4) linked glucosamine units together with some N-acetylglucosamine units. It is obtained by extensive deacetylation of chitin, a polysaccharide common in nature. Chitosan is a biocompatible, biodegradable, and nontoxic natural polymer that exhibits excellent film-forming ability. As a result of its cationic character, chitosan is able to react with polyanions giving rise to polyelectrolyte complexes. Therefore, because of these interesting properties, it has become the subject of numerous scientific reports and patents on the preparation of microspheres and microcapsules. The techniques employed to microencapsulate with chitosan include, among others, ionotropic gelation, spray drying, emulsion phase separation, simple and complex coacervation, and polymerization of a vinyl monomer in the presence of chitosan. The aim of this work is to review some of the more common techniques used and to put forward the results obtained by our research group in preparing chitosan-based microcapsules: for taste masking and improving the stability of a nutritional oil, the sustained release of drugs, as well as the preparation of chitosan superparamagnetic microcapsules for the immobilization of enzymes MH - Cuba MH - Mexico|Sonora PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 1616-5187 UR - ISI:000186165700002 L2 - chitosan;microencapsulation;microparticles;microspheres;microstructure;ORAL SUSTAINED DELIVERY; DRUG-DELIVERY; ALGINATE MICROCAPSULES; ALBUMIN MICROSPHERES; RELEASE BEHAVIOR; CHITIN; NANOPARTICLES; SYSTEMS; WATER; BEADS SO - Macromolecular Bioscience 2003 ;3(10):511-520 9083 UI - 8057 AU - Perales H AU - Brush SB AU - Qualset CO AD - ECOSUR, Mexico City 29290, DF, MexicoUniv Calif Davis, Genet Resources Conservat Program, Davis, CA 95616, USAPerales, H, ECOSUR, Apartado Postal 63, Mexico City 29290, DF, Mexico TI - Landraces of maize in Central Mexico: An altitudinal transect AB - Conservation of crop genetic resources is now considered an important component of sustainable agricultural development. If conservation of genetic resources for agriculture is to be successful, a more complete understanding of the dynamics affecting traditional (landrace) crop populations is needed. We conducted a study of maize-based agriculture in the Central Highlands of Mexico in communities at 2400, 1700, 1400, and 1200 masl to assess the status Of traditional varieties in an area characterized by thorough integration into the national economy. Our research contradicts the view that modern varieties persist because of marginal conditions, deficient infrastructure, weaker markets, or traditional attitudes. One or two landraces dominated highland maize populations and farmers appeared to be more conservative in terms of their emphasis on traditional maize varieties than at lower elevations. The dominance of traditional varieties in the highlands is well known but poorly explained, and the coexistence of traditional and modern varieties in the mid-elevations was unexpected. Our highland study area has good roads, is near Mexico City, and is less than 50 km away from four major crop research institutes that have done maize breeding since 1950's. We suggest that in situ conservation of maize genetic resources in the highlands is sustained because the landraces there have good agronomic performance and are highly valued by farmers for their end-use qualities. At the mid-elevations, competition between local and modern maize was sharpest, and farmers have found that both landraces and improved varieties suit their needs, hence enhancing genetic diversity. Interventions and incentives would appropriately be carried out here to assure in situ conservation of locally adapted landraces of maize MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000183966100002 L2 - maize;landraces;Mexico;altitudinal transects;genetic resources;crop conservation;DIVERSITY; AGRICULTURE; VARIETIES; RACES; CONSERVATION; ADOPTION SO - Economic Botany 2003 ;57(1):7-20 9084 UI - 8058 AU - Perales H AU - Brush SB AU - Qualset CO AD - ECOSUR, Mexico City 29290, DF, MexicoUniv Calif Davis, Genet Resources Conservat Program, Davis, CA 95616, USAPerales, H, ECOSUR, Apartado Postal 63, Mexico City 29290, DF, Mexico TI - Dynamic management of maize landraces in Central Mexico AB - Conservationists of crop genetic resources have feared that in situ conservation was not viable for agriculture precisely because of changes resulting from introduction of new varieties of existing crops, new crops, and new farm practices. In addition, conservation within farming systems necessarily implies a constantly changing crop population resulting from the processes of crop evolution. Even though in situ conservation of crop genetic resources is now generally understood to be dynamic, there are few examples of how evolution takes place in farmers fields. This study describes several changes in maize landraces in four communities along an altitude transect in Central Mexico (1200 to 2400 masl). While true modem varieties have not been widely adopted in the study region, farmer management results in numerous changes in maize landrace populations. Five types of dynamic management were observed: (1) purposeful hybridization between traditional and modern maize types, (2) possible creation of a new maize landrace by directional selection of the progeny of hybridization between two traditional landraces, (3) displacement of a local landrace by the introduction of a modern variety and a non-local landrace, (4) maintenance of stable populations of a locally dominant landrace, and (5) market-driven selection for a minor variety. We concur that in situ conservation of crops must be conceived as an open process where the objective is not to maintain historic varieties or static genetic conditions. Rather, in situ conservation of crops is totally in the hands of the farmer, although interventions may be designed to influence farmers' management of agrobiodiversity MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 18 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000183966100003 L2 - maize landraces;crop management;Mexico;genetic resources;crop conservation;GENETIC-RESOURCES; CONSERVATION SO - Economic Botany 2003 ;57(1):21-34 9085 UI - 7413 AU - Peralta JC AU - Gallagher JP AD - Ciudad Univ, Inst Invest Matemat Aplicadas & Sistemas, Mexico City, DF, MexicoUniv Roskilde, Dept Comp Sci, DK-4000 Roskilde, DenmarkPeralta, JC, Ciudad Univ, Inst Invest Matemat Aplicadas & Sistemas, Circuito Escolar SN, Mexico City, DF, Mexico TI - Convex hull abstractions in specialization of CLP programs AB - We introduce an abstract domain consisting of atomic formulas constrained by linear arithmetic constraints (or convex hulls). This domain is used in an algorithm for specialization of constraint logic programs. The algorithm incorporates in a single phase both top-down goal directed propagation and bottom-up answer propagation, and uses a widening on the convex hull domain to ensure termination. We give examples to show the precision gained by this approach over other methods in the literature for specializing constraint logic programs. The specialization method can also be used for ordinary logic programs containing arithmetic, as well as constraint logic programs. Assignments, inequalities and equalities with arithmetic expressions can be interpreted as constraints during specialization, thus increasing the amount of specialization that can be achieved MH - Denmark MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000185379300008 SO - Logic Based Program Synthesis and Transformation 2003 ;2664():90-108 9086 UI - 7799 AU - Peralta RD AU - Infante R AU - Cortez G AU - Ramos LF AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Excess molar volumes of tetrahydrofuran with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of tetrahydrofuran (THF) with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for all the systems studied. The system THF + methyl methacrylate behaves almost ideally MH - Israel MH - Mexico|Coahuila PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-9104 UR - ISI:000184509200004 L2 - densities;excess volumes;monomers;tetrahydrofuran;BINARY-LIQUID MIXTURES; CHLOROBENZENE; BEHAVIOR; BENZENE; ESTERS SO - Physics and Chemistry of Liquids 2003 ;41(4):361-369 9087 UI - 7800 AU - Peralta RD AU - Infante R AU - Cortez G AU - Elizalde LE AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Excess molar and partial volumes of 2,2 '-oxybis[propane] plus ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of 2,2'-oxybis[propane] with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densimeter and used to calculate the partial and excess volumes. The latter were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for all the systems reported here MH - Israel MH - Mexico|Coahuila PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-9104 UR - ISI:000184509200005 L2 - densities;excess volumes;partial volumes;monomers;2,2 '-oxybis[propane];acrylates;DIPE;POLYNOMIAL SERIES; POWER-SERIES; CYCLOHEXANE; MIXTURES; BEHAVIOR; TOLUENE; BENZENE; ESTERS SO - Physics and Chemistry of Liquids 2003 ;41(4):371-381 9088 UI - 7824 AU - Peralta RD AU - Infante R AU - Cortez G AU - Cadenas G AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Densities, excess volumes, and partial molar volumes of m-xylene plus ethyl acrylate, plus butyl acrylate, plus methyl methacrylate, and plus styrene at 298.15 K AB - Densities of the binary systems of m-xylene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are positive for the binaries of m-xylene with methyl methacrylate, ethyl acrylate, and styrene. The excess volumes for the m-xylene+ butyl acrylate system are positive for solvent (m-xylene) concentrations below 0.3 mole fraction and negative above this concentration MH - Israel MH - Mexico|Coahuila PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000184485700010 L2 - acrylates;densities;excess volumes;m-xylene;monomers;styrene;POLYNOMIAL SERIES; POWER-SERIES; MIXTURES; BEHAVIOR; ESTERS SO - International Journal of Thermophysics 2003 ;24(4):1061-1071 9089 UI - 8168 AU - Peralta RD AU - Infante R AU - Cortez G AU - Torres-Lubian JR AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Boul Ingn Enrique Reyena,Hermosillo 140,Predio El, Saltillo 25000, Coahuila, Mexico TI - Volumetric properties of 1,2-dimethylbenzene plus ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of 1,2-dimethylbenzene with ethyl acrylate (EA), butyl acrylate (BA), methyl methacrylate (MMA), and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes (V-E) were correlated with the Redlich-Kister equation. The excess volumes are positive for the binaries of o-xylene with MMA and styrene, and negative for o-xylene + butyl acrylate. All systems present small deviations from ideality; the system o-xylene + ethyl acrylate is closest to ideality. (C) 2002 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000183516100028 L2 - densities;excess volumes;monomers;1,2-dimethylbenzene;acrylates;styrene;EXCESS VOLUMES; MIXTURES; BEHAVIOR; ESTERS SO - Thermochimica Acta 2003 ;402(1-2):247-252 9090 UI - 8843 AU - Peralta RD AU - Infante R AU - Cortez G AU - Cisneros A AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Densities and excess volumes of benzene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of benzene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar model DMA 5000 oscillating U-tube densitometer. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are positive for all the systems reported here. (C) 2002 Elsevier Science B.V. All rights reserved MH - Israel MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000181671100007 L2 - densities;excess volumes;monomers;acrylates;benzene;MIXTURES SO - Thermochimica Acta 2003 ;398(1-2):39-46 9091 UI - 8866 AU - Peralta RD AU - Infante R AU - Cortez G AU - Ramirez RR AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Densities and excess volumes of binary mixtures of 1,4-dioxane with either ethyl acrylate, or butyl acrylate, or methyl methacrylate, or styrene at T=298.15 K AB - Densities of binary mixtures of 1,4-dioxane with either ethyl acrylate, or butyl acrylate, or methyl methacrylate, or styrene have been measured as a function of composition at T = 298.15 K and atmospheric pressure with an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are positive for the mixtures of 1,4-dioxane with methyl methacrylate and butyl acrylate and negative for the mixtures of 1,4-dioxane and styrene. The excess volumes for the system 1,4-dioxane and ethyl acrylate are negative for mole fractions x of 1,4-dioxane less than or equal to about 0.44 and positive at x greater than about 0.4498 and positive thereafter. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Israel MH - Mexico|Coahuila PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Thermodynamics;Chemistry, Physical U5 - J;Article AV - English IS - 0021-9614 UR - ISI:000181719500004 L2 - densities;excess volumes;monomers;acrylic esters;1,4-dioxane;EQUATIONS; BEHAVIOR; ESTERS SO - Journal of Chemical Thermodynamics 2003 ;35(2):239-250 9092 UI - 9166 AU - Peralta RD AU - Infante R AU - Cortez G AU - Lopez RG AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Volumetric properties of 1,1-dimethylethyl methyl ether with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of 1,1-dimethylethyl methyl ether ( MTBE) with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for all the systems studied MH - Israel MH - Mexico|Coahuila PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 8 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000180923300005 L2 - 1,1-dimethylethyl methyl ether;butyl acrylate;densities;ethyl acrylate;excess volumes;methyl methacrylate;mixtures;monomers;MTBE;styrene;BINARY-LIQUID MIXTURES; EXCESS MOLAR VOLUMES; BEHAVIOR; ESTERS SO - International Journal of Thermophysics 2003 ;24(1):173-183 9093 UI - 7257 AU - Peraza L AU - Ortiz MA AU - Peberdy JF AU - Aguilar G AD - Natl Autonomous Univ Mexico, Fac Chem, Dept Food Sci & Biotechnol, Lab Fungal Physiol,Quim E, Mexico City 04510, DF, MexicoUNAM, Biomed Res Inst, Dept Mol Biol & Biotechnol, Mexico City 70228, DF, MexicoUniv Nottingham, Sch Biol Sci, Nottingham NG7 2RD, EnglandAguilar, G, Natl Autonomous Univ Mexico, Fac Chem, Dept Food Sci & Biotechnol, Lab Fungal Physiol,Quim E, Mexico City 04510, DF, Mexico TI - Growth and pectinase production by Aspergillus Mexican strain protoplast regenerated under acidic stress AB - Protoplasts from Aspergillus sp. FP-180 and Aspergillus awamori NRRL-3112 were released and regenerated at extreme acidic conditions. The best conditions for protoplast release were 0.8 M KCI, pH 5.8, and 3 h of digestion using mycelia from 12- to 16-h cultures from either Aspergillus sp. FP-180 or A. awamori NRRL-3112. The addition of fresh mycelia to an ongoing digestion after 1 h increased protoplast 4.5-5 times. A regeneration efficiency of 90% was attained at pH 6.0, and it was possible to regenerate protoplasts at pH 1.7 with a regeneration efficiency of 0.5% for Aspergillus sp. FP-180. The LpH-10 strain, derived from protoplast from Aspergillus sp FP-180, was able to regenerate at pH 1.7 and grow at pH values as low as 1.5, values at which the original strain is unable to grow. Regeneration at extreme pH improved the performance of LpH-10 strain. It showed a twofold increase in cell growth at pH 2.0 in liquid culture and a higher pectinolytic activity in relation to that produced by the original strain MH - United Kingdom MH - Mexico|Distrito Federal PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0273-2289 UR - ISI:000186005400002 L2 - Aspergillus;protoplast formation;regeneration under acid stress;protoplast storage;pectinases;PENICILLIUM-CHRYSOGENUM; TRICHODERMA-REESEI; ENZYME PRODUCTIVITY; BATCH CULTURES; TRANSFORMATION; FUSION; AUTOLYSIS; NIDULANS; ORYZAE; FUNGI SO - Applied Biochemistry and Biotechnology 2003 ;111(1):15-27 9094 UI - 8651 AU - Perera A AU - Vicente L AD - Univ Paris 06, Phys Theor Liquides Lab, F-75252 Paris 05, FranceUniv Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoPerera, A, Univ Paris 06, Phys Theor Liquides Lab, 4 Pl Jussieu, F-75252 Paris 05, France TI - Simulation of the NO + CO oscillatory reaction on reconstructed Pt(100) AB - The catalytic reduction of nitric oxide by carbon monoxide on the Pt(100) surface is studied by a simulation method in which experimentally accessible parameters, such as temperature, partial pressures, adsorption/desorption energies, are explicitly introduced. The algorithm is able to exhibit the existence of a narrow upper temperature window, where substrate-induced sustained temporal oscillations in the rate formation of CO2 are found, in qualitative agreement with experiments. The formation of restructured islands is also observed in the oscillatory region, both for the substrate and the species lattices. As the temperature is increased, a single period doubling in the rate oscillations is found at the upper boundary of the oscillatory window, before chaotic oscillations settle in, while experiments show a cascade of period doubling toward chaos. The analysis of the calculated adsorbate coverage oscillatory timesequences indicate rather that the period doubling observed here may not belong to a Feigenbaum-scenario route toward chaos MH - France MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000182285900022 L2 - CATALYTIC CO OXIDATION; SPATIOTEMPORAL SELF-ORGANIZATION; KINETIC PHASE-TRANSITIONS; SURFACE-REACTION MODEL; DELAY-INDUCED CHAOS; NO+CO REACTION; PT(100); OSCILLATIONS; SYNCHRONIZATION; SUBSTRATE SO - Physical Chemistry Chemical Physics 2003 ;5(9):1888-1896 9095 UI - 7074 AU - Peretti AV AD - Univ Nacl Cordoba, CONICET, Catedra Div Anim 1, FCEFN, RA-5000 Cordoba, ArgentinaPeretti, AV, Univ Autonoma Estado Hidalgo, Ctr Invest Biol, Apdo Postal 69-1,Plaza Juarez, Pachuca 42001, Hidalgo, Mexico TI - Functional morphology of spermatophores and female genitalia in bothriurid scorpions: genital courtship, coercion and other possible mechanisms AB - Scorpions use sclerotized spermatophores for sperm transfer. The family Bothriuridae has one of the most complex scorpion spermatophores, with a distinct capsule and lamella. This study evaluates the viability of hypotheses relating to the evolution of animal genitalia that attempt to explain the functional morphology observed in spermatophores and female genitalia of some members of this scorpion family. These hypotheses are: female choice (internal courtship), conflict of interests (morphologically forced insemination) and lock-and-key (interspecific mechanical incompatibility). Observations of the mating sequences of 13 bothriurid and one buthid scorpion were recorded. The histology of female atrium was analysed. The data suggest that: (1) a genital copulatory courtship (sexual stimulation through male genitalia) could be a widespread mechanism among the capsules of the studied spermatophores; the wall of the female genital atrium in Brachistosternus as well as of other genera is usually rubbed by spines, tubercles or capsular lobes of spermatophores; the female genital atrium is relatively soft, elastic and uniform among different species; (2) morphological coercion might be admissible only when capsular lobes are very well developed, as females will have difficulty in disengaging by themselves from the large lobes if they attempt to interrupt sperm transfer; this mainly occurs in Bothriurus bonariensis; (3) observations of matings among closely related species indicate that the lock-and-key hypothesis is unable to explain spermatophore morphology in the studied species; however a certain degree of mechanical incompatibility occurs during interspecific mating between two sister species (B. bonariensis and B. chacoensis) owing to differences in capsular lobes and post-insemination behaviour; (4) these hypotheses might not be directly applied to simple spermatophores of the Buthidae Zabius fuscus. The results indicate that even though one genital mechanism can be more frequent than others, they can also exist together, not only in different genera but also in a single species (e.g. simultaneous occurrence of genital sexual stimulation and genital coercion in B. bonariensis). Indirectly these data suggest that the hypotheses most frequently quoted to explain genital morphology are not mutually exclusive MH - Argentina MH - Mexico|Hidalgo PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Zoology U5 - J;Article AV - English IS - 0952-8369 UR - ISI:000186327700004 L2 - genital mechanics;spermatophore;scorpions;Bothriuridae;sexual selection;SEPSID FLIES DIPTERA; SEXUAL CONFLICT; MALE ADAPTATION; EVOLUTION; CHOICE; CHELICERATA; SELECTION; ARANEAE; INSECT; SPERM SO - Journal of Zoology 2003 ;261():135-153 9096 UI - 8164 AU - Peretti AV AU - Battan-Horenstein M AD - Univ Nacl Cordoba, Fac Ciencias Exactas Fis & Nat, CONICET, Catedra Diversidad Anim I, RA-5000 Cordoba, ArgentinaUniv Nacl Cordoba, Fac Ciencias Exactas Fis & Nat, Museo Antropol, RA-5000 Cordoba, ArgentinaPeretti, AV, Univ Augonoma Estado Hidalgo, Ctr Invest Biol, Apdo Postal 69-1,Plaza Juarez, Pachuca 42001, Hidalgo, Mexico TI - Comparative analysis of the male reproductive system in Bothriuridae scorpions: Structures associated with the paraxial organs and the presence of sperm packages (Chelicerata, Scorpiones) AB - The male reproductive system of seven species of the family Bothriuridae are compared. These scorpions are Bothriurus flavidus Kraepelin, B. cordubensis Acosta, B. bonariensis (C. L. Koch), B. chacoensis Maury & Acosta, Brachistosternus ferrugineus (Thorell), Timogenes dorbignyi (Guerin-Meneville), T elegans (Mello-Leitao) and Urophonius brachycentrus Pocock (Bothriuridae). Additional comparisons are made with the buthid Zabius fuscus (Thorell). Observations on the structures associated with the paraxial organs (testis, seminal vesicle and accessory glands) are given. Sperm obtained from the male reproductive tract and fresh spermatophores as well as from the female's genital atrium and seminal receptacles are examined. Accessory glands occur in six out of eight studied bothriurids and in the buthid Z. fuscus. In most species the distal portion of vas deferens has a developed ampulla. All structures vary in size and shape depending on species. Sperm packages were observed in all bothriurids. In contrast, there is no packaged spermatozoa. in Z. fuscus. Each sperm package consists of many spermatozoa surrounded by a common membrane that breaks after the spermatophore capsule is everted into the female genital atrium, releasing the spermatozoa. One hour after insemination, the spermatozoa are found in the atrium and in the seminal receptacles of B. flavidus females, but after 24h spermatozoa are found only in the seminal receptacles. The functional significance of the accessory glands and the presence-absence of sperm packages are discussed MH - Argentina MH - Mexico|Hidalgo PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Zoology U5 - J;Article AV - English IS - 0044-5231 UR - ISI:000183640100002 L2 - accessory glands;sperm packages;scorpions;Bothriuridae;morphology;ultrastructure;FINE-STRUCTURE; SPERMATOZOA; ARACHNIDA; SOLIFUGAE SO - Zoologischer Anzeiger 2003 ;242(1):21-31 9097 UI - 8644 AU - Perez-Armendariz EM AU - Saez JC AU - Bravo-Moreno JF AU - Lopez-Olmos V AU - Enders GC AU - Villalpando I AD - UNAM, Hosp Gen Mexico, Fac Med, UNISSER,Unidad Salud Reprod,Dept Med Expt, Mexico City 06726, DF, MexicoUNAM, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City, DF, MexicoPontificia Univ Catolica Chile, Dept Ciencias Fisiol, Santiago, ChileUniv Kansas, Ctr Med, Dept Anat & Cell Biol, Kansas City, KS, USAPerez-Armendariz, EM, UNAM, Hosp Gen Mexico, Fac Med, UNISSER,Unidad Salud Reprod,Dept Med Expt, Dr Balmis 148,Colonia Doctores, Mexico City 06726, DF, Mexico TI - Connexin43 is expressed in mouse fetal ovary AB - Developmental studies have shown that connexin43 (Cx43) is expressed in the ovary from the first day of life and throughout the rest of postnatal development. In both mouse embryonic ovaries and testes, target-directed deletion of Cx43 gene induces a significant decrease in germinal cells, but the exact mechanism determining this reduction remains unknown. Moreover, recently we found that Cx43 is abundantly expressed in mouse testes from the earliest stages of its fetal development. In the present work we investigate whether Cx43 transcript and protein are expressed in mouse embryonic ovaries. Total RNA was analyzed with specific Cx43 oligonucleotides in RT-PCR studies. A Cx43 PCR product was detected in ovaries at 16.5 and 18.5 days postcoitum (dpc). Bands of 43-45 kDa, characteristic of Cx43, were detected in immunoblots of total homogenates of ovaries at 14.5 and 18.5 dpc. Cell type-specific expression of Cx43 was investigated using double-labeled sections incubated with specific antibodies against Cx43 and the enzyme 3beta-hydroxysteroid dehydrogenase (3betaHSD) or a germ cell nuclear antigen (GCNAl), which are cell markers of steroidogenic and germinal cells, respectively. At 18.5 dpc, Cx43 was found in conglomerates of 3betaHSD-positive cells. Cx43 was also localized at homocellular junctions between parenchyma pregranulosa cells, and at heterocellular junctions between pregranulosa and germinal cells. At these two latter localizations, Cx43 was traced back to 12.5 dpc. In conclusion, this study demonstrates for the first time that from the earliest stages of embryonic ovary development, Cx43 is expressed in principal cell types involved in control of female fertility. These data suggest that the gap junctions formed with Cx43 between somatic and germinal cells may be necessary for prenatal expansion of germinal cells at initial stages of fetal gonadal development. (C) 2003 Wiley-Liss, Inc MH - Chile MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 7 U4 - Anatomy & Morphology U5 - J;Article AV - English IS - 0003-276X UR - ISI:000182422400010 L2 - embryonic development;pregranulosa;germinal;theca;ovary;gap junctions;fetal;GAP JUNCTION PROTEINS; INTERCELLULAR COMMUNICATION; DEVELOPMENTAL REGULATION; POSTNATAL-DEVELOPMENT; CELL COMMUNICATION; MOLECULAR-CLONING; GENE-EXPRESSION; MESSENGER-RNA; RAT OVARY; FOLLICLE SO - Anatomical Record Part A-Discoveries in Molecular Cellular and Evolutionary Biology 2003 ;271A(2):360-367 9098 UI - 7186 AU - Perez-Campos X AU - Singh SK AU - Beroza GC AD - Stanford Univ, Dept Geophys, Stanford, CA 94305, USAUNAM, Inst Geofis, Mexico City 04510, DF, MexicoPerez-Campos, X, CALTECH, Seismol Lab, MS 252-21,1200 E Calif Blvd, Pasadena, CA 91125 USA TI - Reconciling teleseismic and regional estimates of seismic energy AB - Estimates of the radiated seismic energy based on teleseismic and regional data often differ by up to an order of magnitude, with a tendency for regional estimates to be larger than teleseismic estimates for the same event. In this study we compare the velocity spectrum determined from teleseismic data after correction for radiation pattern and propagation effects, with the velocity spectrum determined from regional data, after the corresponding corrections, for nine earthquakes in the Middle America subduction zone of Mexico. This comparison of the corrected spectra is used to identify and reduce the sources of the regional versus teleseismic energy discrepancy, which is about an order of magnitude for these events. We find that the teleseismic attenuation operator needs to be calibrated. In our case, for the tectonic environment of the Mexican subduction zone, we need a teleseismic attenuation operator that is stronger at high frequencies than the global average. A larger factor, however, is the correction needed to account for site amplification. This correction has an impact on both regional and teleseismic data, but it has a larger influence on the regional estimates because the angle of incidence for teleseismic waves is steep and the stations are located on more competent rock. By modifying the teleseismic attenuation operator and applying site corrections based on a generic site model, we essentially eliminate the order-of-magnitude discrepancy between teleseismic and regional estimates of the radiated seismic energy for these events MH - USA MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000186096000018 L2 - EARTHQUAKE SOURCE PARAMETERS; UNITED-STATES EARTHQUAKES; HECTOR MINE EARTHQUAKE; SOURCE SPECTRA; SUBDUCTION ZONE; SITE RESPONSE; ATTENUATION; MEXICO; WAVES; GUERRERO SO - Bulletin of the Seismological Society of America 2003 ;93(5):2123-2130 9099 UI - 7447 AU - Perez-Cornejo P AU - Arreola J AU - Schultz JB AU - Knauf PA AD - Univ Autonoma San Luis Potosi, San Luis Potosi 78210, SLP, MexicoUniv Rochester, Rochester, NY 14642, USA TI - Pharmacological evaluation of the volume-sensitive Cl- channels role on human neutrophil function MH - Mexico|San Luis Potosi MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123800412 SO - Biophysical Journal 2003 ;84(2):85A-85A 9100 UI - 7595 AU - Perez-Flores L AU - Carrari F AU - Osuna-Fernandez R AU - Rodriguez MV AU - Enciso S AU - Stanelloni R AU - Sanchez RA AU - Bottini R AU - Iusem ND AU - ech-Arnold RL AD - Univ Buenos Aires, CONICET, Fac Agron, IFEVA Catedra Cerealicultura, RA-1417 Buenos Aires, DF, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoUniv Buenos Aires, FCE&N, Lab Fisiol & Biol Mol, Buenos Aires, DF, ArgentinaUNAM, Fac Ciencias, Mexico City, DF, MexicoFdn Campomar, Inst Invest Bioquim, Buenos Aires, DF, ArgentinaUniv Nacl Rio Cuarto, Dept Ciencias Nat, Lab Fisiol Vegetal, RA-5800 Rio Cuarto, ArgentinaBenech-Arnold, RL, Univ Buenos Aires, CONICET, Fac Agron, IFEVA Catedra Cerealicultura, Av San Martin 4453, RA-1417 Buenos Aires, DF, Argentina TI - Expression analysis of a GA 20-oxidase in embryos from two sorghum lines with contrasting dormancy: possible participation of this gene in the hormonal control of germination AB - The role of GAs in promoting seed germination is well known and experiments with seeds from different species have suggested the requirement of de novo synthesis of GAs upon imbibition for germination. There are also strong indications that the enhancement of GA synthesis is part of the mechanism through which environmental signals (i.e. light) induce germination. Since along the GA biosynthetic pathway, oxidation at C-20 carried out by GA 20-oxidases is thought to be a site of regulation, a cDNA clone encoding a GA 20-oxidase was isolated from embryos of sorghum (SbGA 20ox). Expression analysis of this gene in embryos within imbibed caryopses with low dormancy showed detectable amounts of the specific mRNA early upon incubation, increasing thereafter. In contrast, it remained barely detectable in embryos from dormant caryopses. Changes in endogenous GA(4) levels were in agreement with those of SbGA 20ox mRNA, suggesting that GA production might be regulated differentially at the level of transcription of this gene. The expression of SbGA 20ox was enhanced in incubated embryos isolated from either type of caryopses, illustrating a physiological control exerted by the surrounding seed tissues on gene expression. The results also show that ABA leads to a suppression of transcription of this gene MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000185064100009 L2 - dormancy;GA 20-oxidase;germination;gibberellins;Sorghum;PREHARVEST SPROUTING RESISTANCE; GIBBERELLIN 20-OXIDASE; SEED-GERMINATION; ARABIDOPSIS-THALIANA; ABA LEVELS; SUSCEPTIBLE VARIETIES; DEFICIENT MUTANTS; FRUIT-DEVELOPMENT; ABSCISIC-ACID; BIOSYNTHESIS SO - Journal of Experimental Botany 2003 ;54(390):2071-2079 9101 UI - 8675 AU - Perez-Fuentes R AU - Guegan JF AU - Barnabe C AU - Lopez-Colombo A AU - Salgado-Rosas H AU - Torres-Rasgado E AU - Briones B AU - Romero-Diaz M AU - Ramos-Jimenez J AU - Sanchez-Guillen MD AD - CNRS, IRD, Genet Malad Infect, UMR 9926, F-34394 Montpellier 05, FranceBenemerita Univ Autonoma Puebla, Fac Med, Puebla 72000, MexicoIMSS, Coordinac Invest, Ctr Med Nacl MAC, Puebla 72000, MexicoIMSS, Parasitol Lab, Ctr Invest Biomed Oriente, Puebla 72430, MexicoSanchez-Guillen, MD, CNRS, IRD, Genet Malad Infect, UMR 9926, 911 Ave Agropolis,BP 64501, F-34394 Montpellier 05, France TI - Severity of chronic Chagas disease is associated with cytokine/antioxidant imbalance in chronically infected individuals AB - Understanding the pathogenic mechanisms in chronic Chagas disease, a major cause of morbidity and mortality in Latin America, is essential for the design of rational therapeutic strategies. In this paper we show that the development of Chagas disease is a consequence of a long-term and complex relationship between parasite persistence and maladapted homeostatic mechanisms in the host which leads to pathologic changes, We performed a retrospective study on 50 patients with chronic Chagas disease and 50 healthy control individuals. The specific immune response was detected by ELISA and IHA tests using autochthonous antigens. inflammatory process with the cytokine tumour necrosis factor (TNF)-alpha and nitric oxide (NO). and antioxidant protection with glutathione peroxidase and superoxide dismutase (SOD) levels. We developed generalised linear modelling procedures to assess simultaneously which explanatory variables and/or their interactions better explained disease severity in patients. Our results show the existence of a strong relationship between anti-Trypanosoma cruzi levels and chronic Chagas disease (P < 0.0001). Taken together, the statistical data indicate both cumulative and complementary effects, where the increase in TNF-alpha (P = 0.004) and NO (P = 0.005) levels correlated with a reduction in glutathione peroxidase (P = 0.0001) and SOD (P = 0.01) levels drives the disease pathology in chronically infected patients. Our findings may have important implications for understanding host susceptibility to develop severe chronic infectious disease. In addition we show putative targets for the design of new therapeutic strategies to prevent disease progression, considering both specific treatment against the aetiological agent and modulation of the different immunopathological reactions in chronically infected individuals with chronic Chagas disease. (C) 2003 Australian Society for Parasitology Inc. Published by Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Parasitology U5 - J;Article AV - English IS - 0020-7519 UR - ISI:000182359100006 L2 - chronic infectious disease;Chagas disease severity;pathogenesis;cytokine-antioxidant imbalance;tumour necrosis factor alpha;nitric oxide;superoxide dismutase;glutathione peroxidase;NITRIC-OXIDE SYNTHASE; TUMOR-NECROSIS-FACTOR; TRYPANOSOMA-CRUZI INFECTION; PARASITE PERSISTENCE; IMMUNE-RESPONSE; FACTOR-ALPHA; MICE; ANTIGENS; CARDIOMYOPATHY; AUTOIMMUNITY SO - International Journal for Parasitology 2003 ;33(3):293-299 9102 UI - 9029 AU - Perez-Lorenzana A AU - Pires CAD AD - Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, ItalyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Fed Paraiba, Dept Fis, BR-58051970 Joao Pessoa, Paraiba, BrazilPerez-Lorenzana, A, Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy TI - Electric charge quantization and extra dimensions AB - In models with flat extra dimensions tiny Dirac neutrino masses can be generated via the coupling of four-dimensional Standard Model fields to a higher dimensional fermion. Here we argue that, in spite of the Dirac nature of the neutrino, quantization of the electric charge can still be understood as a result of anomaly cancellation, charge conservation and naturalness requirements MH - Brazil MH - Italy MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000181332900007 L2 - Dirac neutrinos;charge quantization;extra dimensions;NEUTRINO OSCILLATIONS; MAJORANA NEUTRINO; CONSTRAINTS; MILLIMETER; ANOMALIES; PARITY; MASS SO - Modern Physics Letters A 2003 ;18(1):65-73 9103 UI - 7688 AU - Perez-Montiel D AU - Frankel WL AU - de Leon DC AU - Suster S AD - Ohio State Univ, Med Ctr, Columbus, OH 43210, USAInst Nacl Cancerol, Mexico City, DF, Mexico TI - Neuroendocrine tumors of the pancreas: A clinical-pathologic study of 70 cases MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000180720100497 SO - Modern Pathology 2003 ;16(1):108A-108A 9104 UI - 7806 AU - Perez-Montiel D AU - Frankel WL AU - de Leon DC AU - Suster S AD - Ohio State Univ, Columbus, OH 43210, USAInst Nacl Cancerol, Mexico City, DF, Mexico TI - Neuroendocrine tumors of the pancreas: A clinical-pathologic study of 70 cases MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000180732500499 SO - Laboratory Investigation 2003 ;83(1):108A-108A 9105 UI - 7902 AU - Perez-Sanchez E AU - Muir JF AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandUniv Juarez Autonoma Tabasco, Inst Aquaculture Postgrad Programme, Tabasco, MexicoPerez-Sanchez, E, Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland TI - Fishermen perception on resources management and aquaculture development in the Mecoacan estuary, Tabasco, Mexico AB - The southern Mexican states on the coast of the Gulf of Mexico produce approximately 85% of the total national oil production. The region has also attracted attention due its important economic influence in terms of fisheries, aquaculture and agriculture, and for its ecosystem diversity. The justification for more integrated approaches to aquaculture development is significant, as coastal aquaculture has brought economic and employment benefits to both national economies and coastal people. The aim of this study is the analysis of Mecoacan fishing communities' perception on coastal resources management and to assess group awareness of the potential benefits and impacts of coastal aquaculture. Although aquaculture practices have been implemented as an alternative to fishing and to improve current levels of fisheries production, the results showed that conditions within Mecoacan fisheries have deteriorated significantly, as collective aggregation is not producing a positive outcome for the local communities. However, fishermen regarded the restructuring of fishing organisations as a means of integrating employment and income generation alternatives such as aquaculture practices. Therefore, a key to success will be to demonstrate the ability of good coastal management to promote capacity building within coastal communities in the context of a participatory intervention strategy through formal and informal organisations. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Tabasco MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000184145500011 L2 - ORGANIZATIONS; COMANAGEMENT; GOVERNMENT; BANGLADESH SO - Ocean & Coastal Management 2003 ;46(6-7):681-700 9106 UI - 7324 AU - Perez-Tellez C AU - Smith JR AU - Edwards JK AD - PMEX Explorat & Prod, Technol Dev Dept, Villahermosa, Tabasco, MexicoLouisiana State Univ, Craft & Hawkins Dept Petr Engn, Baton Rouge, LA 70803, USAPerez-Tellez, C, PMEX Explorat & Prod, Technol Dev Dept, Villahermosa, Tabasco, Mexico TI - A new comprehensive, mechanistic model for underbalanced drilling improves wellbore pressure predictions AB - A new comprehensive, mechanistic model that allows more precise predictions of wellbore pressure and two-phase flow parameters for underbalanced drilling (UBD) is proposed. The model incorporates the effects of fluid properties and pipe sizes and, thus, is largely free of the limitations of empirically based correlations. The model is validated against actual UBD field data and full-scale experiments in which the gas and liquid injection flow rates as well as drilling fluid properties were similar to those used in common UBD operations. Additionally, a comparison against two different commercial, empirically based UBD simulators shows better performance with the mechanistic model MH - Mexico|Tabasco MH - USA PB - RICHARDSON: SOC PETROLEUM ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Petroleum U5 - J;Article AV - English IS - 1064-6671 UR - ISI:000185620600001 L2 - FLOW PATTERN TRANSITIONS; GAS-LIQUID FLOW; 2-PHASE FLOW; VERTICAL TUBES; ANNULI; SLUG SO - Spe Drilling & Completion 2003 ;18(3):199-208 9107 UI - 8656 AU - Perez-Torrero E AU - Torrero C AU - Collado P AU - Salas M AD - Univ Nacl Educ Distancia, Fac Psicol, Dept Psicobiol, Madrid 028040, SpainUniv Nacl Autonoma Mexico, Inst Neurobiol, Dept Dev Neurobiol & Neurophysiol, Juriquilla, Qro, MexicoPerez-Torrero, E, Univ Nacl Educ Distancia, Fac Psicol, Dept Psicobiol, Ciudad Univ S-N Codigo Postal, Madrid 028040, Spain TI - A paradigm of undernourishing and neonatal rehabilitation in the newborn rat AB - Perinatal undernutrition as a deficiency of nutrient availability, affects body and brain developmental processes and promotes recurrent health problems. Thus, altered mother-litter bonds and deficient environmental interactions may interfere with the brain pluripotential capabilities of the newborn. To gather information concerning the mechanisms underlying perinatal undernutrition we designed a paradigm of undernutrition and neonatal rehabilitation in the rat. An underfed group came from pregnant Wistar rats fed with 50% of the diet from G6 to G12 and with 60% from G13 until G21. After birth, pups were daily undernourished during 12 h daily by rotating a pair of lactating well-nourished dams which had one of their nipples subcutaneously ligated. The rehabilitated animals were undernourished pups neonatally fed by a pair of normally lactating dams. Controls received plenty of food during the pre- and neonatal periods. Pups were sacrificed at 12, 20 and 30 days of age. Perinatal underfeeding significantly reduced body and brain weights and neuronal morphometric parameters. Normal neonatal feeding in the newborn ameliorated the damages associated to food deprivation. The current undernourishing paradigm may be helpful to assess brain development alterations, as well as to study the compensatory mechanisms associated to salutary epigenetic influences MH - Mexico|Queretaro MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences;Nutrition & Dietetics U5 - J;Article AV - English IS - 1028-415X UR - ISI:000182356400005 L2 - undernutrition;rats;food rehabilitation;early development;PROTEIN-MALNUTRITION AFFECTS; NEURONAL DEVELOPMENT; SOCIAL INTERACTIONS; JUVENILE RATS; VISUAL-CORTEX; DEPRIVATION; UNDERNUTRITION; STIMULATION; MOTOR SO - Nutritional Neuroscience 2003 ;6(2):113-115 9108 UI - 6965 AU - Perez-Velazquez M AU - Gonzalez-Felix ML AU - Lawrence AL AU - Gatlin DM AD - Univ Sonora, Dept Invest Cient & Tecnol, Hermosillo 83000, Sonora, MexicoTexas A&M Univ Syst, TAES, Shrimp Mariculture Project, Port Aransas, TX, USATexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAPerez-Velazquez, M, Univ Sonora, Dept Invest Cient & Tecnol, Rosales & Ninos Heroes S-N,AP 1819, Hermosillo 83000, Sonora, Mexico TI - Changes in lipid class and fatty acid composition of adult male Litopenaeus vannamei (Boone) in response to culture temperature and food deprivation AB - The effects of culture temperature and food deprivation on lipid class and fatty acid composition of adult male Litopenaeus vannamei (Boone) were investigated. Shrimp were maintained in recirculating seawater systems at temperatures of 26 and 32 degreesC and fed 75% dry commercial feed and 25% fresh-frozen squid for 42 days. Additionally, groups of fed and non-fed shrimp were maintained at 26 degreesC for 17 days. In shrimp fed at either 26 or 32 degreesC, polar lipids were the main constituents of total identified lipid classes in muscle tissue (66-71%), while neutral lipids were more abundant in hepatopancreas (82-88%). Higher levels of triglycerides were observed in lipids of shrimp hepatopancreas kept at 32 degreesC, but no other lipid class was affected by temperature. A significantly hi.-her proportion of 22:6n-3 was consistent in muscle and hepatopancreas polar and neutral lipids of shrimp maintained at 26 degreesC. In response to food deprivation, the amount of polar lipids, but not neutral lipids. was reduced by approximately 28% in muscle tissue. whereas all lipid reserves were almost depleted in the hepatopancreas. The variable consumption of some individual fatty acids was observed in polar and neutral lipids of both tissues MH - Mexico|Sonora MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000186683700011 L2 - Litopenaeus vannamei;shrimp;lipid class;fatty acid;temperature;food deprivation;CARCINUS-MAENAS; PENAEUS-JAPONICUS; MOLTING CYCLE; TIGER PRAWN; ACCLIMATION TEMPERATURE; METABOLISM; SHRIMP; PHOSPHOLIPIDS; STARVATION; MATURATION SO - Aquaculture Research 2003 ;34(13):1205-1213 9109 UI - 8716 AU - Perez-Velazquez M AU - Gonzalez-Felix ML AU - Lawrence AL AU - Bray WA AU - Gatlin DM AD - Univ Sonora, Dept Invest Cient & Tecnol, Hermosillo 83000, Sonora, MexicoTexas A&M Univ, TAES Shrimp Mariculture Project, Port Aransas, TX 78373, USATexas A&M Univ, Dept Wildlife & Fisheries Sci, College Stn, TX 77843, USAPerez-Velazquez, M, Univ Sonora, Dept Invest Cient & Tecnol, Rosales & Ninos Heroes S-N AP 1819 CP, Hermosillo 83000, Sonora, Mexico TI - Dietary effects on sperm quality of Litopenaeus vannamei broodstock AB - A 56-d feeding trial was conducted to investigate the effect of diet on sperm quality of Pacific white shrimp Litopenaeus vannamei broodstock. Dietary treatments consisted of a combination of 75% dry maturation diet and 25% fresh-frozen squid (dry-weight basis). Supplemental nutrients of the maturation diet were selectively deleted and replaced with wheat Starch to produce the following treatments: 1) 75% basal maturation diet plus 25% squid (control); 2) 75% maturation diet without supplemental vitamins plus 25% squid; 3) 75% maturation diet without supplemental cholesterol and phospholipids plus 25% squid; 4) 75% maturation diet without supplemental astaxanthin plus 25% squid; and 5) a fresh diet composed of 60% squid and 40% Maine bloodworms. Shrimp fed the control diet and the diet without supplemental astaxanthin had significantly higher mean (+/- SEM) change in sperm count (4.6 +/- 3.2 million sperm cells and 2.9 +/- 2.5 million sperm cells, respectively), with respect to baseline (8.7 +/- 1.0, 6.4 +/- 1.0, 9.0 +/- 1.3, 6.6 +/- 0.7, and 6.0 +/- 0.8 million sperm cells for treatments 1, 2, 3, 4, and 5, respectively), than shrimp fed the diet without supplemental vitamins (-1.7 +/- 2.6 million sperm cells), but not significantly higher than those of shrimp receiving the diets without supplemental cholesterol-phospholipids (1.2 +/- 2.5 million sperm cells) and the fresh diet (1.3 +/- 1.6 million sperm cells). Dietary deficiencies also were reflected in weight gain of shrimp fed the diet without supplemental vitamins (-2.0 g) and the fresh diet (-0.8 g), which were significantly lower than weight gain of shrimp fed the control diet (1.1 g) and the diet without supplemental cholesterol-phospholipids (0.8 g). No significant differences were detected among treatments for percentage of abnormal sperm and survival data. Results demonstrated a significant effect of diet on reproductive quality of male L. vannamei and indicated that the typical combination of fresh-food organisms used is not nutritionally optimal for male broodstock MH - Mexico|Sonora MH - USA PB - BATON ROUGE: WORLD AQUACULTURE SOCIETY RP - NOT IN FILE U3 - TC 4 U4 - Fisheries U5 - J;Article AV - English IS - 0893-8849 UR - ISI:000182163100011 L2 - PENAEUS-VANNAMEI; MATURATION; PERFORMANCE SO - Journal of the World Aquaculture Society 2003 ;34(1):92-98 9110 UI - 6624 AU - Perez-Villasenor F AU - Iglesias-Silva GA AU - Hall KR AD - Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, Mexico TI - Temperature dependence of a modified Pitzer equation for strong electrolytes systems AB - We have established the temperature dependence for a modified Pitzer model. This model adequately correlates osmotic and activity coefficient data together with the dilution enthalpy for single-electrolyte solutions. For multisalt aqueous solutions, the modified model can successfully predict the behavior of the osmotic coefficient and the enthalpy at different temperatures. For the new model, the total average percentage error in the osmotic and activity coefficients is 3.1% MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000187442400034 L2 - LOCAL COMPOSITION MODEL; CHLORIDE PLUS WATER; EXCESS GIBBS ENERGY; ACTIVITY-COEFFICIENTS; AQUEOUS-SOLUTIONS; THERMODYNAMIC PROPERTIES; OSMOTIC COEFFICIENTS; MAGNESIUM-CHLORIDE; ISOPIESTIC DETERMINATION; ELEVATED-TEMPERATURES SO - Industrial & Engineering Chemistry Research 2003 ;42(26):6962-6969 9111 UI - 9048 AU - Perez-Villasenor F AU - Iglesias-Silva GA AU - Hall KR AD - Inst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, Mexico TI - Prediction of osmotic and activity coefficients using a modified Pitzer equation for multicomponent strong electrolyte systems at 298 K AB - We have predicted the osmotic and activity coefficients of strong electrolyte solutions using a modification of the Pitzer equation. The modified equation can be used for multicomponent aqueous solutions by applying a mixing rule at the Debye-Huckel term. We have found that the modification of the Pitzer equation retains the accuracy of the original equation without using any characteristic parameters evaluated from the experimental data. The new equation is predictive and simpler than the original Pitzer equation MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000181302700018 L2 - LOCAL COMPOSITION MODEL; EXCESS GIBBS ENERGIES; 25 DEGREES C; SINGLE SOLVENT; THERMODYNAMICS; MIXTURES; 25-DEGREES-C; MGCL2 SO - Industrial & Engineering Chemistry Research 2003 ;42(5):1087-1092 9112 UI - 7154 AU - Perez A AU - Sudarsky D AD - Penn State Univ, CGPG, University Pk, PA 16802, USAUNAM, ICN, Mexico City, DF, MexicoPerez, A, Penn State Univ, CGPG, University Pk, PA 16802, USA TI - Comment on "Ultraviolet modifications of dispersion relations in effective field theory" MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0031-9007 UR - ISI:000186138300053 SO - Physical Review Letters 2003 ;91(17): 9113 UI - 8720 AU - Perez C AU - Perez S AU - Fuentes GA AU - Corma A AD - Univ A Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Ing Procesos & Hidraul, Mexico City 09340, DF, MexicoUniv Politecn Valencia, Inst Tecnol Quim, E-46071 Valencia, SpainPerez, C, Univ A Metropolitana Xochimilco, Dept Sistemas Biol, Calz Hueso 1100,Col Villa Quietud, Mexico City 04960, DF, Mexico TI - Preparation and use of a chiral amine ruthenium hydrogenation catalyst supported on mesoporous silica AB - We report the synthesis and use of dichloro-(S)-6,6'-dimethyl-2,2'-diaminobiphenyl-ruthenium complex ((S)-MAB-Ru), an air-stable, highly active catalyst for the hydrogenation of alpha, beta-unsaturated carboxylic acids at 25degreesC and 4.85 atm, hydrogen. The homogeneous hydrogenations of itaconic acid and alpha-acetamidocinnamic acid had yields above 97% in each case, and the enantiomeric excesses (e.e.) were 80 and 69.8% to the (R)-products, respectively. When we used (S)-MAB-Ru chemically bound to MCM-41, a mesoporous SiO2, the conversion of both acids was complete and both e.e. were practically 97%. The solid-bound catalyst was successfully reutilized in the hydrogenation of itaconic acid and the drop in asymmetric induction was only 3% after three runs. The fact that complexes containing chiral amine ligands provide such high yields and e.e. opens a potentially important area of research in the design of industrially relevant catalysts. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000182145800026 L2 - chiral amine ruthenium hydrogenation catalyst;mesoporous silica;alpha,beta-unsaturated carboxylic acid;ASYMMETRIC HYDROGENATION; RH(I) COMPLEXES; ZEOLITES; RHODIUM; HETEROGENISATION SO - Journal of Molecular Catalysis A-Chemical 2003 ;197(1-2):275-281 9114 UI - 6806 AU - Perez CM AU - az-Cueto L AU - Van der voort D AU - Schwarze JE AU - Gerton GL AD - Univ Penn, Philadelphia, PA 19104, USAIMSS, Unidad Invest Med Reprod, Mexico City, DF, Mexico TI - Acrogranin (Granulin Epithelin Precursor, PCDFG) is crucial for mouse embryo receptivity and implantation MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000185672400072 SO - Fertility and Sterility 2003 ;80():S27-S28 9115 UI - 7115 AU - Perez E AU - Diaz F AU - Espina S AD - CICESE, Dept Aquaculture, Ensenada 22830, Baja California, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Lab Acuario, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol, Lab Ecofisiol, Mexico City 04510, DF, MexicoDiaz, F, CICESE, Dept Aquaculture, POB 434844, San Diego, CA 92143, USA TI - Thermoregulatory behavior and critical thermal limits of the angelfish Pterophyllum scalare (Lichtenstein) (Pisces : Cichlidae) AB - (1) Final temperature preferendum of juvenile (0.9-1.9 g) and adult (5.2-12.5 g) angelfish Pterophyllum scalare were determined with acute and gravitation methods. The final preferenda were similar, independent of the method and development stage (29.0-31.1degreesC). (2) The critical thermal maxima (CTMax) for juveniles were 36.9degreesC, 37.6degreesC, 40.6degreesC, 40.8degreesC and for adults 38.4degreesC, 38.6degreesC. 41.0degreesC. 42.1degreesC. Adult angelfish CTMax was slightly higher than in juveniles (1degreesC; P<0.05); the endpoint of CTMax was the onset of spasms. (3) The acclimation response ratio for both stages had an interval of 0.33-0.44; these values are in agreement with results for subtropical and tropical fishes. (4) Therefore it is recommended that angelfish cultivation should be consistent with temperatures that do not change abruptly throughout the year and temperature maximum does not exceed 30degreesC MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biology;Zoology U5 - J;Article AV - English IS - 0306-4565 UR - ISI:000186260300001 L2 - preferred temperature;acute and gravitation methods;critical thermal maximum;acclimation response ratio;Pterophyllum scalare;TEMPERATURE TOLERANCE; PREFERRED TEMPERATURES; ICTALURUS-PUNCTATUS; FINAL PREFERENDUM; CHANNEL CATFISH; UNITED-STATES; MAXIMUM; FISHES; ACCLIMATION; SELECTION SO - Journal of Thermal Biology 2003 ;28(8):531-537 9116 UI - 7489 AU - Perez J AU - Infante F AU - Vega FE AU - Holguin F AU - Macias J AU - Valle J AU - Nieto G AU - Peterson SW AU - Kurtzman CP AU - O'Donnell K AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUSDA ARS, Insect Biocontrol Lab, Beltsville, MD 20705, USAUSDA ARS, Natl Ctr Agr Utilizat Res, Microbial Genom & Bioproc Res Unit, Peoria, IL 61604, USAPerez, J, El Colegio Frontera Sur, Carretera Antiguo Aeropuerto Km 2-5, Tapachula 30700, Chiapas, Mexico TI - Mycobiota associated with the coffee berry borer (Hypothenemus hampei) in Mexico AB - Field surveys were carried out in coffee plantations in Chiapas, Mexico, to collect and identify fungi associated with the cuticle, gut, faeces and galleries of the coffee berry borer, Hypothenemus hampei. Insects and coffee berries containing galleries were collected in three coffee farms at different altitudes: Rosario Izapa (425 m), La Alianza (700 m) and Monteperla (950 m). An additional sample consisting of coffee berry borers reared in the laboratory on meridic diets was also included. Results show that there is a great diversity of fungi associated with this insect. 212 cultures, including 40 species distributed in 22 genera, were isolated. The recovery of fungi from the galleries was markedly less than from the borer's body. Three of the isolated species were undescribed; two belonging to the Penicillium and one to Hanseniaspora. Most of the species were collected from the cuticle of the insect, and the presence of fungi was not correlated with altitude. Fusarium, Penicillium, Candida and Aspergillus were the dominant genera with percentage abundance of 26.4, 18.7, 13.4 and 12.5%, respectively. The present study provides a detailed description of the mycobiota associated with H. hampei and represents a significant advance in the understanding of the relationship among this insect and the fungi associated with it MH - Mexico|Chiapas MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Mycology U5 - J;Article AV - English IS - 0953-7562 UR - ISI:000185272900017 L2 - FUSARIUM-SOLANI MONILIALES; APIS-MELLIFERA; HONEY BEES; SCOLYTIDAE; FUNGI; COLEOPTERA; TUBERCULARIACEAE; MYCOFLORA; CHIAPAS SO - Mycological Research 2003 ;107():879-887 9117 UI - 9433 AU - Perez JC AU - Montes JR AU - Teply ML AD - Univ Wisconsin, Dept Math Sci, Milwaukee, WI 53201, USAInst Tecnol & Estud Super Monterrey, Dept Matemat, Tlalpan 14380, MexicoUNAM, Inst Matemat, Mexico City 04510, DF, MexicoTeply, ML, Univ Wisconsin, Dept Math Sci, POB 413, Milwaukee, WI 53201 USA TI - Torsion theoretic dimensions and relative Gabriel correspondence AB - Let tau be an hereditary torsion theory. For a ring with tau-Gabriel dimension, we find necessary and sufficient conditions for the existence of a bijective correspondence between the tau-torsionfree injective modules and the tau-closed prime ideals. As an application, new characterizations of fully bounded noetherian rings are obtained. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000180311300006 L2 - KRULL DIMENSION; RINGS SO - Journal of Pure and Applied Algebra 2003 ;178(1):101-114 9118 UI - 7695 AU - Perez MAA AU - Pitaru S AU - Fregoso OA AU - Gasga JR AU - Arzate H AD - UNAM, Fac Odontol, Lab Biol Celular & Mol, Mexico City, DF, MexicoTel Aviv Univ, Maurice & Gabriela Goldschleger Sch Dent Med, IL-69978 Tel Aviv, IsraelUNAM, Inst Invest Mat, Mexico City, DF, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoArzate, H, UNAM, Fac Odontol, Lab Biol Celular & Mol, Mexico City, DF, Mexico TI - Anti-cementoblastoma-derived protein antibody partially inhibits mineralization on a cementoblastic cell line AB - The effect of human anti-cementoblastoma-derived protein antibody during cementogenesis in vitro was investigated by using human cementoblastoma-derived cells. Cultures treated with 5 mug/ml of CP antibody from day 1 to day 15 revealed a significant decrease in alkaline phosphatase activity (ALP) 40% (p < 0.005), 44% (p < 0.001), 49% (p < 0.1), and 45% (p < 0.02) at 9, 11, 13, and 15 days, respectively. Immunoexpression of osteopontin revealed that in cultures treated with anti-CP antibody, the positive number of cementoblastoma cells was reduced by 87, 83, 69, and 52% at 5, 7, 9, and 11 days, respectively. Bone sialoprotein immunoexpression showed a decrease in positive cells of 82, 51, 60, 80, 83, and 87% at 5, 7, 9, 11, 13, and 15 days, respectively, as compared to controls. The Ca/P ratio of the mineral-like tissue deposited in vitro by cementoblastoma cells revealed that control cultures had a Ca/P ratio of 1.45 and 1.61 at 5 and 15 days, whereas experimental cultures revealed a Ca/P ratio of 0.50 and 0.79 at 5 and 15 days, respectively. Electron diffraction patterns showed inner double rings representing D-spacing that were consistent with those of hydroxyapatite in both control and experimental cultures. Examination of the crystallinity with high resolution transmission electron microscopy showed homogeneous and preferential spatial arrangement of hydroxyapatite crystallites in control and experimental cultures at 15 days. Atomic force microscopy images of control cultures at 5 and 15 days revealed small granular particles and grain agglomeration that favored the formation of crystalline plaques with a lamellar-like pattern of the mineral-like tissue. Experimental cultures at 5 and 15 days showed tiny and homogeneous granular morphology. The agglomerates maintained spherical morphology without organization of needle-like crystals to form plaque-like structures. Based on these findings, it is hypothesized that cementoblastoma-derived protein may be associated to crystal growth, compositional and morphological features during the mineralization process of cementum in vitro. (C) 2003 Elsevier Science (USA). All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 1047-8477 UR - ISI:000184778500001 L2 - cementum;cementoblastoma-derived protein;bone sialoprotein;hydroxyapatite;mineralization;osteopontin;NONSPECIFIC ALKALINE-PHOSPHATASE; BONE SIALOPROTEIN BSP; ATTACHMENT PROTEIN; HUMAN CEMENTUM; PERIODONTAL-LIGAMENT; IN-VITRO; ELECTRON-MICROSCOPY; ACELLULAR CEMENTUM; OSTEOPONTIN; EXPRESSION SO - Journal of Structural Biology 2003 ;143(1):1-13 9119 UI - 7026 AU - Perez MJ AU - Cisneros MM AU - Lopez HF AU - Calderon HA AU - Valdes E AD - Inst Tecnol, Saltillo, Coahuila, MexicoUniv Wisconsin, Dept Mat Engn, Madison, WI 53706, USAPerez, MJ, Inst Tecnol, Saltillo, Coahuila, Mexico TI - Microstructural evolution in austempered ductile iron during non-isothermal annealing AB - This work investigates the thermal stability of ausferritic microstructures such as those found in NiCuMo austempered ductile iron (ADI). Typical ADI microstructures consisting of acicular ferrite and high carbon austenite were produced by heat treating NiCuMo ductile iron for 2 h at 315degreesC and 370degreesC. It was found that low temperature austempering led to the precipitation of a hexagonal e-carbide phase. Hence, differential thermal analysis was used to closely follow the active phase transformations founds in the experimental ADI during non-isothermal annealing. From these tests, it was apparent that the ausferrite stability is strongly influenced by the austempering conditions and heating rates. In particular, the experimental outcome shows that the ADI microstructures decompose at temperatures of 428degreesC and 459degreesC for irons austempered at 315degreesC and 370degreesC, respectively. Further evidence for the decomposition reactions involving acicular ferrite and high carbon austenite was provided by TEM observations. The TEM results indicate that ausferrite decomposes into ferrite-cementite during non-isothermal annealing via the precipitation of transition carbides. In the iron austempered at high temperature, orthorhombic eta-Fe2C was identified as the transition carbide, whereas tricilinic silicon-carbide precipitates became dominant in ADI treated at 315degreesC. (C) 2003 Maney Publishing MH - Mexico|Coahuila MH - USA PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000186431800036 L2 - austempered ductile irons;ausferrite stability;nonisothermal annealing;differential thermal analysis;TRANSFORMATION SO - International Journal of Cast Metals Research 2003 ;16(1-3):203-208 9120 UI - 2983 AU - Perez VC AU - Castro MC AU - Morote G AU - Miranda MD AU - Munoz E AU - Munoz-Villanueva MC AU - Font P AU - De la Torre MJ AU - Lopez-Pardo M AU - Sanchez M AU - Casasola JC AU - Collantes E AD - Hosp Univ Reina Sofia, Cordoba, SpainGen Hosp, Mexico City, DF, Mexico TI - Differential features between ankylosing spondylitis and undifferentiated spondyloarthropathy patients MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551400823 SO - Annals of the Rheumatic Diseases 2003 ;62():252-252 9121 UI - 2984 AU - Perez VC AU - Castro MC AU - Morote G AU - Miranda MD AU - Munoz E AU - Munoz-Villaneuva MC AU - Font P AU - De la Torre MJ AU - Lopez-Pardo M AU - Sanchez M AU - Casasola JC AU - Collantes E AD - Hosp Univ Reina Sofia, Res Unit, Cordoba, SpainRheumatol Gen Hosp, Mexico City, DF, Mexico TI - Correlation between BASDAI and others clinical and biological activity parameters of the disease and Short Form-36 Health Survey in spondyloarthropathy patients MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551400825 SO - Annals of the Rheumatic Diseases 2003 ;62():253-253 9122 UI - 2988 AU - Perez VC AU - Castro MC AU - Morote G AU - Miranda MD AU - Munoz E AU - Munoz-Villanueva MC AU - Font P AU - De la Torre MJ AU - Sanchez M AU - Lopez-Pardo M AU - Casasola JC AU - Collantes E AD - Hosp Univ Reina Sofia, Res Unit, Cordoba, SpainGen Hosp, Mexico City, DF, Mexico TI - Relationship between clinical and biological activity of Spondyloarthropathies and need of taking nonsteroidal anti-inflammatory drugs MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551401586 SO - Annals of the Rheumatic Diseases 2003 ;62():470-470 9123 UI - 8972 AU - Perger T AU - Kovacs T AU - Turanyi T AU - Trevino C AD - UNAM, Fac Ciencias, Mexico City 04510, DF, MexicoLorand Eotvos Univ, Dept Phys Chem, ELTE, H-1518 Budapest, HungaryTuranyi, T, UNAM, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Determination of adsorption and desorption parameters from ignition temperature measurements in catalytic combustion systems AB - When a cold catalyst is exposed to a fuel-oxygen mixture, the surface gets covered with the more effectively adsorbing species. When the temperature is increased, this species is desorbed and the ignition temperature is determined by the rate of desorption. Based on the equations for the heat balance, expressions were derived for the calculation of ignition temperature from the parameters of the experimental setup, the preexponential factor Ad and activation energy E-d of desorption, the ratio of sticking coefficients, and the ratio of adsorption orders of fuel and oxygen. Published experimental data for the catalytic ignition of CO, H-2, and CH4 were reinterpreted using the expressions obtained, and the following parameters were determined for polycrystalline platinum catalyst: E-d(H-2/Pt) = 43.3+/-5.2 kJ/mol, E-d(CO/Pt) = 107.2+/-12.7 kJ/mol, E-d(O-2/Pt) = 190 34 kJ/mol, S-H2,S-0/S-O2,S-0 = 36.7+/-9.6, S-CO,S-0/S-O2,S-0 = 41.2+/-8.5, S-O2,S-0/SCH4,0 = 5.9+/-0.3. Error limits refer to a confidence level of 0.95. The activation energy of desorption for CO and O-2 and the ratio of zero coverage sticking coefficients of O-2 and CH4 are the first experimentally based determinations of these parameters. Experimental ignition temperatures could be reproduced assuming second-order ' adsorption of CO, H-2, and O-2 on the Pt surface. These reaction orders have been debated in the literature MH - Hungary MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000181398900013 L2 - HYDROGEN-OXYGEN REACTION; STAGNATION-POINT FLOW; HOMOGENEOUS-HETEROGENEOUS COMBUSTION; PT(111) SURFACE; PLATINUM SURFACES; AIR MIXTURES; CARBON-MONOXIDE; MOLECULAR-BEAM; GAS-PHASE; BIFURCATION BEHAVIOR SO - Journal of Physical Chemistry B 2003 ;107(10):2262-2274 9124 UI - 9234 AU - Periago MJ AU - Rodrigo J AU - Ros G AU - Rodriguez-Jerez JJ AU - Hernandez-Herrero M AD - Univ Murcia, Fac Vet Sci & Food Sci & Technol, Dept Food Sci & Nutr, E-30071 Murcia, SpainAutonomous Univ Ciudad Juarez, Ciudad Juarez, MexicoAutonomous Univ Barcelona, Fac Vet Sci, E-08193 Barcelona, SpainPeriago, MJ, Univ Murcia, Fac Vet & Ciencia & Tecnol Alimentos, Dept Tecnol Alimentos Nutr & Bromatol, E-30071 Murcia, Spain TI - Monitoring volatile and nonvolatile amines in dried and salted roes of tuna (Thunnus thynnus L.) during manufacture and storage AB - Dried and salted roe, obtained from the reproductive organs of female tuna (Thunnus tynnus L.), is a typical fish-based food in the Mediterranean area of Spain. In the present study, we monitored the formation of volatile amines (trimethyamine nitrogen [TMA-N] and total basic volatile nitrogen [TBVN]) and nonvolatile amines (biogenic amines) in dried and salted tuna roe after processing and storage for 8 weeks at 4, 20, and 30degreesC. The salting and drying process significantly increased the TBVN, cadaverine, tyramine, phenylethylamine, and tryptamine contents, and bacteria with histamine decarboxylase activity were detected both in raw and in dried and salted tuna roes. During storage of tuna roe, TMA-N and TBVN levels increased significantly after the fourth week of storage at 30degreesC, whereas biogenic amine contents remained more or less constant. However, samples stored at 30degreesC showed histamine formation after the first week of storage, with a concentration of <50 ppm. The volatile and nonvolatile amine concentrations in tuna roe were below the consumer safety limit, with the exception of the total biogenic amine level in roe stored at 30degreesC, which exceeded the European Community's recommended limit (300 ppm). These results indicate that in properly stored tuna roe, histamine formation will not represent a serious health risk to consumers unless the tuna roe has previously been mishandled MH - Mexico|Chihuahua MH - Spain PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000180890100027 L2 - SPANISH SEMIPRESERVED ANCHOVIES; BACTERIAL HISTAMINE PRODUCTION; HAKE MERLUCCIUS-MERLUCCIUS; BIOGENIC-AMINES; FISH; QUALITY; TEMPERATURE; CADAVERINE; PUTRESCINE; INDICATORS SO - Journal of Food Protection 2003 ;66(2):335-340 9125 UI - 9236 AU - Pernestig AK AU - Georgellis D AU - Romeo T AU - Suzuki K AU - Tomenius H AU - Normark S AU - Melefors O AD - Karolinska Inst, Micorbiol & Tumorbiol Ctr, SE-17177 Stockholm, SwedenSwedish Inst Infect Dis Control, SE-17182 Solna, SwedenNatl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Genet Mol, Mexico City 04510, DF, MexicoEmory Univ, Dept Microbiol & Immunol, Atlanta, GA 30322, USAMelefors, O, Karolinska Inst, Micorbiol & Tumorbiol Ctr, SE-17177 Stockholm, Sweden TI - The Escherichia coli BarA-UvrY two-component system is needed for efficient switching between glycolytic and gluconeogenic carbon sources AB - The Escherichia coli BarA and UvrY proteins were recently demonstrated to constitute a novel two-component system, although its function has remained largely elusive. Here we show that mutations in the sensor kinase gene, barA, or the response regulator gene, uvrY, in uropathogenic E. coli drastically affect survival in long-term competition cultures. Using media with gluconeogenic carbon sources, the mutants have a clear growth advantage when competing with the wild type, but using media with carbon sources feeding into the glycolysis leads to a clear growth advantage for the wild type. Results from competitions with mutants in the carbon storage regulation system, CsrA/B, known to be a master switch between glycolysis and gluconeogenesis, led us to propose that the BarA-UvrY two-component system controls the Csr system. Taking these results together, we propose the BarA-UvrY two-component system is crucial for efficient adaptation between different metabolic pathways, an essential function for adaptation to a new environment MH - Mexico|Distrito Federal MH - Sweden MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 24 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000180834300016 L2 - BINDING PROTEIN CSRA; 2-COMPONENT SIGNAL-TRANSDUCTION; CAROTOVORA SUBSP CAROTOVORA; GENE-EXPRESSION; REGULATORY GENES; STATIONARY-PHASE; RNA; GACA; MUTATIONS; GROWTH SO - Journal of Bacteriology 2003 ;185(3):843-853 9126 UI - 7700 AU - Persaud P AU - Stock JM AU - Steckler MS AU - Martin-Barajas A AU - Diebold JB AU - Gonzalez-Fernandez A AU - Mountain GS AD - CALTECH, Seismol Lab, Pasadena, CA 91125, USAColumbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964, USACICESE, Ensenada 22830, Baja California, MexicoPersaud, P, CALTECH, Seismol Lab, 252-21, Pasadena, CA 91125, USA TI - Active deformation and shallow structure of the Wagner, Consag, and Delfin Basins, northern Gulf of California, Mexico AB - [1] Oblique rifting began synchronously along the length of the Gulf of California at 6 Ma, yet there is no evidence for the existence of oceanic crust or a spreading transform fault system in the northern Gulf. Instead, multichannel seismic data show a broad shallow depression, similar to 70 x 200 km, marked by active distributed deformation and six similar to10-km-wide segmented basins lacking well-defined transform faults. We present detailed images of faulting and magmatism based on the high resolution and quality of these data. The northern Gulf crust contains a dense ( up to 18 faults in 5 km) complex network of mainly oblique-normal faults, with small offsets, dips of 60 - 80degrees and strikes of N-N30 degreesE. Faults with seafloor offsets of tens of meters bound the Lower and two Upper Delfin Basins. These subparallel basins developed along splays from a transtensional zone at the NW end of the Ballenas Transform Fault. Twelve volcanic knolls were identified and are associated with the strands or horsetails from this zone. A structural connection between the two Upper Delfin Basins is evident in the switching of the center of extension along axis. Sonobuoy refraction data suggest that the basement consists of mixed igneous sedimentary material, atypical of mid-ocean ridges. On the basis of the near-surface manifestations of active faulting and magmatism, seafloor spreading will likely first occur in the Lower Delfin Basin. We suggest the transition to seafloor spreading is delayed by the lack of strain-partitioned and focused deformation as a consequence of shear in a broad zone beneath a thick sediment cover MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000184709200002 L2 - northern Gulf of California;oblique rifting;reflection seismic data;distributed deformation;sonobuoy refraction data;NORTHEASTERN BAJA-CALIFORNIA; SIERRA SAN-FERMIN; PLATE MOTION; CONTINENTAL TECTONICS; MAGNETIC-ANOMALIES; PACIFIC PLATE; LATE MIOCENE; PROTO-GULF; EXTENSION; SEA SO - Journal of Geophysical Research-Solid Earth 2003 ;108(B7): 9127 UI - 7996 AU - Persi P AU - Tapia M AD - CNR, Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, ItalyUNAM, Inst Astron, Ensenada 22830, Baja California, MexicoPersi, P, CNR, Ist Astrofis Spaziale & Fis Cosm, Via Fosso Cavaliere, I-00133 Rome, Italy TI - Mid-infrared images of the star forming region GGD 14 (IRAS 06084-0611) AB - Mid-infrared images at 8.7, 9.7 and 12.5 mum are presented of the star forming region GGD 14 associated with the source IRAS 06084-0611. In an area of similar to30" around the IRAS position, two mid-infrared sources were found. One was identified with the cometary compact HII region VLA 1 and the second with the faint and unresolved radio continuum source VLA 4. The mid-infrared morphology of VLA 1 is very similar to that of the radio continuum suggesting a direct interaction between the ionized gas and the dust. The infrared source associated with VLA 4 shows a large infrared excess and its derived infrared luminosity is L1-20 mum = 350 L-circle dot, indicating the presence of a young star later than B3. In addition, its spectrum between 2.47 and 11.62 mum observed by ISOPHOT shows the presence of infrared emission bands at 3.3, 6.2, 7.7, 8.6 and 11.2 mum with relative intensity ratios typical of compact HII regions. Finally, the radio continuum source VLA 2, undetected on our mid-infrared images, shows an infrared luminosity of similar to8.5 L-circle dot confirming its nature of an embedded T-Tauri star MH - Italy MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000184099400023 L2 - stars : formation;infrared : stars;HERBIG-HARO OBJECTS; RADIO-SOURCES; OUTFLOW; PHOTOMETRY; GGD-12-15; EMISSION; CLUSTER SO - Astronomy & Astrophysics 2003 ;406(1):149-154 9128 UI - 9639 AU - Persi P AU - Tapia M AU - Roth M AU - Marenzi AR AU - Testi L AU - Vanzi L AD - CNR, Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, ItalyUNAM, Inst Astron, Ensenada 22833, Baja California, MexicoCarnegie Inst Washington, Las Campanas Observ, La Serena, ChileOsserv Astrofis Arcetri, I-50125 Florence, ItalyEuropean So Observ, Santiago, ChileHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAPersi, P, CNR, Ist Astrofis Spaziale & Fis Cosm, Via Fosso Cavaliere, I-00133 Rome, Italy TI - Near and Mid-infrared images of the massive star forming complex G9.62+0.19 AB - A near- and mid-infrared study of the star formation complex G9.62+0.19 is presented. It includes photometrically calibrated images through wide-band JHK and narrow-band Br, H-2 and 12.5 mum filters. These were taken at Las Campanas, La Silla and OAN-San Pedro Martir. We found evidence of two embedded young clusters of O-B5 stars associated with the radio components B and C, one compact and one ultracompact HII region. The data suggest the presence of a third, more dispersed cluster of more luminous infrared stars at the southern edge of the cloud complex. A large fraction of the star members of each cluster exhibit significant infrared excess. We confirm the detection of a very red near- and mid-infrared source immersed in the molecular hot core (component F). An H-2 shocked gas knot, probably an obscured Herbig-Haro object, was found associated to the blue-shifted lobe of the high-velocity molecular outflow in this core. The properties of the individual sources are discussed in detail MH - Chile MH - Italy MH - Mexico|Baja California MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000179768500023 L2 - stars : formation;infrared : stars;METHANOL MASERS; POINT SOURCES; HII-REGIONS; H2O MASERS; HOT; EMISSION; PHOTOMETRY; AMMONIA; CORE; OH SO - Astronomy & Astrophysics 2003 ;397(1):227-236 9129 UI - 7720 AU - Pestryakov AN AU - Lunin VV AU - Kharlanov AN AU - Bogdanchikova NE AU - Tuzovskaya IV AD - Tomsk Polytech Univ, Tomsk 634034, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaCtr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoPestryakov, AN, Tomsk Polytech Univ, Tomsk 634034, Russia TI - Electronic state of gold in supported clusters AB - The electronic states of gold in gold supported nanoparticles modified by Ce, Zr, La and Cs oxides have been studied by the methods of IR spectroscopy of adsorbed CO, UV-visible spectroscopy of diffuse reflectance, XRD and electron microscopy. The additives of Ce and Zr oxides stabilize the ionic states of supported gold and increase the effective charge of the ions. In contrast, La and Cs oxides lower the ion effective charge and favour their fast reduction under redox treatments and reaction medium. It is explained by electron donor-acceptor interaction of the supported metal nanoparticles with the modifiers MH - Mexico|Baja California MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000184687800071 L2 - SILVER CATALYSTS; CARBON-MONOXIDE; SELECTIVE OXIDATION; METHANOL; SURFACE; ADSORPTION; HYDROGEN; OXIDES; TIO2; CO SO - European Physical Journal D 2003 ;24(1-3):307-309 9130 UI - 7883 AU - Pestryakov AN AU - Lunin VV AU - Bogdanchikova NE AU - Petranovskii VP AU - Knop-Gericke A AD - Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, GermanyMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoPestryakov, AN, Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, Faradayweg 4-6, D-14195 Berlin, Germany TI - Supported foam-silver catalysts for alcohol partial oxidation AB - Structural. mechanical, gas-dynamic and catalytic properties of silver catalysts supported on foam ceramics have been studied. The foam catalysts have high gas permeability, mechanical strength, and low density. Catalytic activity and selectivity of the foam catalysts in the process of oxidation of methanol to formaldehyde exceed the characteristics of the commercial crystalline and granulated catalysts. Different electronic states (ions, charged cluster, crystals) of silver on the catalyst surface have been studied by the method of UV-visible spectroscopy. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Baja California MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1566-7367 UR - ISI:000184331800005 L2 - silver;foam catalysts;methanol oxidation;UV-visible spectroscopy;DIFFUSE-REFLECTANCE; METHANOL OXIDATION; METAL-CATALYSTS; DEEP OXIDATION; STATE; HYDROCARBONS SO - Catalysis Communications 2003 ;4(7):327-331 9131 UI - 9462 AU - Pestryakov AN AU - Lunin VV AU - Fuentes S AU - Bogdanchikova N AU - Barrera A AD - Tomsk Polytech Univ, Dept Organ Chem, Tomsk 634034, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaUNAM, Ctr Ciencias Mat Condensada, Ensenada 2681, Baja California, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoPestryakov, AN, Tomsk Polytech Univ, Dept Organ Chem, Lenin Ave 30, Tomsk 634034, Russia TI - Influence of modifying additives on the electronic state of supported palladium AB - The influence of modifying additives of Ce, Zr, La and Cs oxides on the electronic state of palladium supported on gamma-Al2O3 has been studied by IR-spectroscopy of adsorbed CO, diffuse reflectance UV-visible spectroscopy, X-ray diffraction (XRD) and H-2 chemisorption. The modified supports have been prepared using impregnation, coprecipitation and sol-gel methods. It is established that Ce and Zr oxide additives increase the effective charge of palladium ions whereas La and Cs oxides lower it. The effect of metal-support interaction is stronger in samples prepared by sol-gel than by coprecipitation (C) 2002 Elsevier Science. B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000180273300015 L2 - CATALYTIC PROPERTIES; OXIDATION; CO; SPECTROSCOPY; ADSORPTION; PD/AL2O3; SILVER; IONS; LA SO - Chemical Physics Letters 2003 ;367(1-2):102-108 9132 UI - 6297 AU - Peters CM AU - Purata SE AU - Chibnik M AU - Brosi BJ AU - Lopez AM AU - Ambrosio M AD - New York Bot Garden, Inst Econ Bot, Bronx, NY 10458, USAInst Ecol, Dept Ecol, Xalapa 91070, Veracruz, MexicoUniv Iowa, Dept Anthropol, Iowa City, IA 52242, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoPeters, CM, New York Bot Garden, Inst Econ Bot, Bronx, NY 10458, USA TI - The life and times of Bursera glabrifolia (HBK) Engl. In Mexico: A parable for ethnobotany MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000188815800002 L2 - alebrijes;Bursera glabrifolia;conservation;oaxaca;Mexico;wood carving;EVOLUTIONARY TRENDS; DECIDUOUS FOREST SO - Economic Botany 2003 ;57(4):431-441 9133 UI - 7188 AU - Peterson AT AU - Navarro-Siguenza AG AU - Hernandez-Banos BE AU - Escalona-Segura G AU - Rebon-Gallardo F AU - Rodriguez-Ayala E AU - Figueroa-Esquivel EM AU - Cabrera-Garcia L AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoColegio Frontera Sur, ECOSUR, Unidad Campeche, Campreche, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Lab Biogeog, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USA TI - The Chimalapas Region, Oaxaca, Mexico: a high-priority region for bird conservation in Mesoamerica AB - The Chimalapas region, in eastern Oaxaca, Mexico, holds lowland rainforests, tropical dry forests, and cloud forests typical of the Neotropics, as well as montane pine and pine-oak forests more typical of the Nearctic. Totaling more than 600,000 ha, much of the region is forested, and in a good state of preservation. The Chimalapas avifauna is by far the most diverse for any region of comparable size in the country, totalling at least 464 species in the region as a whole (with more than 300 species in the lowland rainforest) representing 44% of the bird species known from Mexico. Within the region, the humid Atlantic lowlands hold 317 species, the montane regions 113 species, and the southern dry forested lowlands 216 species. Important species present in the region include Harpy Eagle Harpia harpyja and several other large eagles, Black Penelopina nigra and probably Horned Oreophasis derbianus Guans, Scarlet Macaw Ara macao, Cinnamon-tailed Sparrow Aimophila sumichrasti, Rose-bellied Bunting Passerina rositae, and Resplendent Quetzal Pharomachrus mocinno. The area holds immense lowland rainforests and cloud forests that rank among the largest and best preserved in all of Mesoamerica, including a complete lowland-to-highland continuum, with entire watersheds preserved more or less intact MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0959-2709 UR - ISI:000186097500005 SO - Bird Conservation International 2003 ;13(3):227-253 9134 UI - 9149 AU - Peterson SW AU - Perez J AU - Vega FE AU - Infante F AD - USDA ARS, Natl Ctr Agr Utilizat Res, Microbial Genom & Bioproc Res Unit, Peoria, IL 61604, USAColegio Frontera Sur, ECOSUR, Tapachula 30700, Chiapas, MexicoUSDA ARS, Insect Biocontrol Lab, Beltsville, MD 20705, USAPeterson, SW, USDA ARS, Natl Ctr Agr Utilizat Res, Microbial Genom & Bioproc Res Unit, 1815 N Univ St, Peoria, IL 61604 USA TI - Penicillium brocae, a new species associated with the coffee berry borer in Chiapas, Mexico AB - Penicillium brocae is anew monoverticillate species isolated from coffee berry borers collected at coffee plantations in Mexico near Cacahoatan, Chiapas, and from borers reared on artificial diets at ECOSUR laboratory facilities in Tapachula, Chiapas. Phenotypically, it is in Penicillium series Implicatum, but because it does not conform to known species we have described it as new. ITS and large subunit rDNA were sequenced and compared to determine the phylogenetic position of this species. It is most closely related to Penicillium adametzii. Penicillium brocae has only been found in association with the coffee berry borer and is one of several fungi that grow in coffee berry borer galleries. Penicillium brocae may provide the exogenous sterols necessary for the coffee berry borer's development and thus be mutualistically associated with the insect MH - USA MH - Mexico|Chiapas PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 12 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000181049400019 L2 - broca;DNA sequences;fungi;internal transcribed spacer;ribosomal DNA;Scolytidae;Trichocomaceae;HYPOTHENEMUS-HAMPEI; SCOLYTIDAE SO - Mycologia 2003 ;95(1):141-147 9135 UI - 8966 AU - Petranovskii V AU - Gurin V AU - Bogdanchikova N AU - Sugi Y AD - UNAM, CCMC, Ensenada 22800, Baja California, MexicoBelarussian State Univ, Physicochem Res Inst, Minsk 220080, ByelarusGifu Univ, Gifu 50511, JapanPetranovskii, V, UNAM, Ctr Ciencias Mat Condensada, POB 439036, San Ysidro, CA 92143 USA TI - Controlling copper reducibility in mordenites by varying the SiO2/Al2O3 molar ratio AB - A hydrogen reduction of copper ions incorporated into a series of mordenites with variable SiO2/Al2O3 molar ratio (MR) leads to a number of the reduced copper species with dominance of small metal particles at high MR which are shown in optical spectra as the plasmon resonance absorption band at 550-600 nm with various spectral shape, while the lowest MR-rhordenites prevent the reduction of copper to metal. (C) 2002 Elsevier Science B.V. All rights reserved MH - Byelarus MH - USA MH - Japan MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000181468500003 L2 - mineral mordenite;zeolites;Si/Al ratio;copper;nanomaterials;microstructure SO - Materials Letters 2003 ;57(12):1781-1785 9136 UI - 7673 AU - Petricevich VL AU - Mendonca RZ AD - Inst Butantan, Lab Imunoquim, BR-05504900 Sao Paulo, BrazilInst Butantan, Lab Imunol Viral, BR-05504900 Sao Paulo, BrazilUniv Autonoma Estado Morelos, Fac Med, Cuernavaca 62210, Morelos, MexicoPetricevich, VL, Inst Butantan, Lab Imunoquim, Av Vital Brasil N 1500, BR-05504900 Sao Paulo, Brazil TI - Inhibitory potential of Crotalus durissus terrificus venom on measles virus growth AB - This paper presents the antiviral activity found in a snake with Crotalus durissus terrificus venom (Cdt), studied by use of microplate inhibition assay, using measles virus (MV). Cdt at concentrations below 100 mug/ml showed no cytotoxicity for Vero cells. This study shows the optimal conditions for cell treatment and infection. Two factors that affect virus binding and infection efficiency were studied: the use of an adsorption step, where infection volume was varied; and the concentration of fetal bovine serum (FBS). The adsorption step, with or without FBS, increased the bound virus percentage, whereas it increased bound virus at equilibrium only in FBS-free until 2.5% FBS. In contrast, the addition of 10% FBS decreased the bound virus percentage. The inhibition of MV replication in Vero cells was observed when Cdt was added either before or during cell infection with virus. Its inhibitory concentration against MV replication was 0.1 until 100 mug/ml, respectively. The anti-MV effect of the Cdt was gradually decreased when it was added before or during infection, and little inhibition was observed when Cdt was added I h after infection, suggesting that the MV infection was inhibited at the time of the initial events such as at the moment of adsorption and penetration of the viral cycle. In conclusion, Cdt contains anti-MV effects that may be of potential clinical interest. (C) 2003 Elsevier Ltd. All rights reserved MH - Brazil MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000184754100003 L2 - measles virus;Crotalus durissus terrificus venom;cell treatment;cell infection;MEMBRANE COFACTOR PROTEIN; WESTERN DIAMONDBACK RATTLESNAKE; CELLULAR RECEPTOR; HEMORRHAGIC TOXINS; CYANOVIRIN-N; ATROX VENOM; BIOCHEMICAL-CHARACTERIZATION; FUSION PROTEIN; CD46; BINDING SO - Toxicon 2003 ;42(2):143-153 9137 UI - 9510 AU - Petrone CM AU - Francalanci L AU - Carlson RW AU - Ferrari L AU - Conticelli S AD - Univ Studi Firenze, Dipartimento Sci Terra, I-50121 Florence, ItalyCarnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015, USACNR, Ctr Studio Minerogenesi & Geochim Appl, I-50121 Florence, ItalyUniv Nacl Autonoma Mexico, Ctr Geociencias, Juriquilla 76230, Quintana Roo, MexicoUniv Studi Basilicata Campus, Fac Sci Matemat Fis & Nat, I-85100 Potenza, ItalyPetrone, CM, Univ Studi Firenze, Dipartimento Sci Terra, Via G La Pira 4, I-50121 Florence, Italy TI - Unusual coexistence of subduction-related and intraplate-type magmatism: Sr, Nd and Pb isotope and trace element data from the magmatism of the San-Pedro-Ceboruco graben (Nayarit, Mexico) AB - Subduction-related and continental intraplate type magmatism coexisted in the San Pedro-Ceboruco (SPC) graben in western Mexico in a rather unusual close association. The magmatic systems belong to the Trans-Mexican Volcanic Belt (TMVB), the active volcanic arc linked to subduction of the Rivera and Cocos plates beneath the North American plate. Three different magmatic series are recognized in the San Pedro-Ceboruco graben: calc-alkaline, Na-alkaline, and transitional. The transitional series can be further subdivided into: Low-Ti; High-Ti and Amado Nervo groups. The different magmatic series are characterized by variable LILE/HFSE and LREE/HFSE ratios. The Na-alkaline series has the most radiogenic Nd compositions and the lowest Sr-87/Sr-86 (0.70320-0.70344). The calc-alkaline series shows the lowest epsilon(Nd) and the highest Sr-87/Sr-86 (0.70395-0.70402) overlapping the values for the transitional High-Ti group (0.70390-0.70404). Sr isotopic compositions for transitional Low-Ti (0.70367-0.70394) and transitional Amado Nervo (0.70351-0.70389) groups are intermediate between those of the Na-alkaline and calc-alkaline rocks. All the studied rocks show similar Pb-207/Pb-204 (15.58-15.61) and Pb-208/Pb-204 (38.41-38.65), but Pb-206/Pb-204 discriminates well the Na-alkaline series (18.90-19.03) from all the others (18.68-18.75). Compositional and isotopic data suggest that the different series derive from distinct parental magmas, which were generated by partial melting of a heterogeneous mantle source characterized by two different components. A depleted mantle (DM) component with low Pb-206/Pb-204 and an enriched (EM) component characterized by high Pb-206/Pb-204. These two components mix together in various degrees and are both overprinted, although in different proportions, by metasomatic processes. Metasomatism of the mantle wedge was induced by subduction-related agents resulting from the dehydration/melting of subducted sediments and characterized by variable fluid/melt proportions. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Quintana Roo MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000180174700001 L2 - western Mexico;subduction;intraplate;depleted mantle;enriched mantle;fluids;PRIMITIVE CALC-ALKALINE; VOLCANIC BELT; CHEMICAL CLASSIFICATION; COMPOSITIONAL DIVERSITY; BASALTIC VOLCANISM; SANGANGUEY VOLCANO; WESTERN MEXICO; MANTLE; ROCKS; EVOLUTION SO - Chemical Geology 2003 ;193(1-2):1-24 9138 UI - 8870 AU - Petrov R AU - Kestens L AU - Zambrano PC AU - Guerrero MP AU - Colas R AU - Houbaert Y AD - State Univ Ghent, Dept Met & Mat Sci, B-9052 Zwijnaarde, Gent, BelgiumUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, NL, MexicoPetrov, R, State Univ Ghent, Dept Met & Mat Sci, Technol Pk 903, B-9052 Zwijnaarde, Gent, Belgium TI - Microtexture of thin gauge hot rolled steel strip AB - A series of trials were conducted on a compact rolling mill to evaluate the properties and characteristics of carbon steel strip hot-rolled to less than 2 mm in thickness from thin cast slabs. Steels of two different compositions were studied, the first one, a low carbon steel, was rolled to a total reduction ranging from 94 to 98%, final thickness ranging from 1.06 to 2.69 mm, whereas the second one was a Nb bearing microalloyed steel rolled to a total reduction of around 96%. The rolling trials were complemented by means of computer modelling to get a deeper understanding of the process. It was found that the ferritic grain size of the low carbon strips varied from 7 to 10 mum, with the finer sizes found in the thinner strips, the grain size of the microalloyed steel was found to be 3.6 mum. Analysis of the texture of the hot rolled strips indicated that the ferrite in the low carbon resulted from the transformation of recrystallized austenite, in comparison, low intensity transformation texture from unrecrystallized austenite was found in the Nb bearing steel. The observed texture data correlate with the R-values measured MH - Belgium MH - Mexico|Nuevo Leon PB - TOKYO: IRON STEEL INST JAPAN KEIDANREN KAIKAN RP - NOT IN FILE U3 - TC 6 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0915-1559 UR - ISI:000181760900013 L2 - hot rolling;steel;texture;microstructure;TEXTURES SO - Isij International 2003 ;43(3):378-385 9139 UI - 6737 AU - Pfeiler E AU - Markow TA AD - Arizona State Univ, Dept Biol, Tempe, AZ 85287, USACtr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Guaymas, Sonora, MexicoUniv Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ, USAPfeiler, E, Arizona State Univ, Dept Biol, Tempe, AZ 85287, USA TI - Induction of suppressed ADH activity in Drosophila pachea exposed to different alcohols AB - Laboratory-reared males of the cactophilic Drosophila pachea exhibit a spontaneous and sex-specific suppression of alcohol dehydrogenase (ADH) activity within 4 days after eclosion. A lack of ADH activity also is usually seen in wild-caught males, although relatively high activity is always seen in female flies. In the present study we examined the effectiveness of different alcohols and related compounds, including several found naturally in necroses of the host cactus, to induce suppressed ADH activity in wild males of D. pachea and to serve as enzyme substrates. The primary alcohols ( methanol, ethanol, 1-propanol, 1-butanol, and 1-pentanol), and the secondary alcohols (2-propanol and 2-butanol), each induced activity after 24 h exposure, although to different degrees. 1,2-Propanediol was usually effective as an inducer, but 2,3-butanediol usually was ineffective. Little or no induction was seen with 1-octanol, 2-pentanol, 3-methyl-1-butanol, 3-hydroxy-2-butanone, or acetaldehyde. Although the compounds tested varied in their ability to function as ADH substrates, methanol was the only alcohol that showed no activity staining. Ethanol induction of ADH activity was apparent after 3 - 6 h exposure and induced activity decreased dramatically within 1 week of flies being placed in an alcohol-free environment. Ethanol exposure did not induce ADH in adult female D. pachea, or in adult males and females of D. acutilabella in which control males show reduced ADH activity compared to females. The implications of the loss of ADH activity in adult males of D. pachea, as they relate to feeding ecology and fitness, are discussed MH - Mexico|Sonora MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0006-2928 UR - ISI:000187199300005 L2 - alcohol dehydrogenase;alcohol induction;Drosophila pachea;fitness;MELANOGASTER LARVAE; MULTIPLE FORMS; DEHYDROGENASE; ETHANOL; TOLERANCE; ADULT; POPULATIONS; MOJAVENSIS; LONGEVITY; SPERM SO - Biochemical Genetics 2003 ;41(11-12):413-426 9140 UI - 7095 AU - Picazo O AU - Azcoitia I AU - Garcia-Segura LM AD - CSIC, Inst Cajal, E-28002 Madrid, SpainInst Politecn Nacl, Escuela Super Med, Mexico City 11340, DF, MexicoUniv Complutense Madrid, Fac Biol, Dept Biol Celular, E-28040 Madrid, SpainGarcia-Segura, LM, CSIC, Inst Cajal, Avenida Doctor Arce 37, E-28002 Madrid, Spain TI - Neuroprotective and neurotoxic effects of estrogens AB - The ovarian hormone 17 beta-estradiol (E2) is neuroprotective in animal models of neurodegenerative diseases. Some studies suggest that the neuroprotective effects of 17 beta-estradiol are a consequence of its antioxidant activity that depend on the hydroxyl group in the C3 position of the A ring. As in other tissues, 17beta-estradiol is metabolized in the brain to 2-hydroxyestradiol (2OHE2) and 2-methoxyestradiol (2MEOHE2). These two molecules present the hydroxyl group in the A ring and have a higher antioxidant activity than 17beta-estradiol. To test the hypothesis that conversion to 2-hydroxyestradiol and 2-methoxyestradiol may mediate neuroprotective actions of 17beta-estradiol in vivo, we have assessed whether these molecules protect hilar hippocampal neurons from kainic acid toxicity. Ovariectomized Wistar rats received an i.p. injection of 1, 10 or 100 mug 17 beta-estradiol, 2-hydroxyestradiol or 2-methoxyestradiol followed by an i.p. injection of kainic acid (7 mg/ kg) or vehicle. Treatment with kainic acid resulted in a significant loss of hilar neurons. Only the highest dose tested of 17 p-estradiol (100 mug/ rat) prevented kainic acid-induced neuronal loss. 2-Hydroxyestradiol and 2-methoxyestradiol did not protect hilar neurons from kainic acid, suggesting that the mechanism of neuroprotection by 17beta-estradiol in vivo is not mediated by its metabolism to catecholestrogens or methoxycatecholestrogens. Furthermore, 2-methoxyestradiol (100 mug/rat), by itself, resulted in a significant neuronal loss in the hilus that was detected 96 h after the treatment with the steroid. This finding suggests that endogenous metabolism of 17 beta-estradiol to 2-methoxyestradiol may counterbalance the neuroprotective effects of the hormone. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000186362000003 L2 - estradiol;catecholestrogen;hydroxyestradiol;methoxyestradiol;neuroprotection;neurotoxicity;hippocampus;kainic acid;GROWTH-FACTOR-I; ENDOGENOUS MAMMALIAN METABOLITE; CORTICAL EXPLANT CULTURES; ACTIVATED PROTEIN-KINASE; SMOOTH-MUSCLE CELLS; RECEPTOR-ALPHA; STATUS EPILEPTICUS; DENTATE GYRUS; BRAIN INJURY; CANCER-CELLS SO - Brain Research 2003 ;990(1-2):20-27 9141 UI - 7155 AU - Pico FX AU - Quintana-Ascencio PF AU - Menges ES AU - Lopez-Barrera F AD - Univ Nijmegen, Dept Ecol, NL-6525 ED Nijmegen, NetherlandsArchbold Biol Stn, Lake Placid, FL 33862, USAColegia Frontera Sur, Div Conservac Biodiversidad, MX-29290 San Cristobal De Las Casas, Chiapas, MexicoPico, FX, Univ Nijmegen, Dept Ecol, Toernooiveld 1, NL-6525 ED Nijmegen, Netherlands TI - Recruitment rates exhibit high elasticity and high temporal variation in populations of a short-lived perennial herb AB - Empirical studies for different life histories have shown an inverse relationship between elasticity (i.e. the proportional contribution to population growth rate) and temporal variation in vital rates. It is accepted that this relationship indicates the effect of selective pressures in reducing variation in those life-history traits with a major impact on fitness. In this paper, we sought to determine whether changes in environmental conditions affect the relationship between elasticity of vital rates and their temporal variation, and whether vital rates with simultaneously large elasticity and temporal variation might represent a characteristic life-history strategy. We used demographic data on 13 populations of the short-lived Hypericum cumulicola over 5-6 years, in three time-since-fire classes. For each population of each time-since-fire, we computed the mean matrix over years and its respective elasticity matrix, and the coefficients of variation in matrix entries over study years as an estimate of temporal variability. We found that mean elasticity negatively significantly correlated with temporal variation in vital rates in populations (overall eight out of 13) included in each time-since-fire. However, seedling recruitment exhibited both high elasticity and high temporal variation in almost all study populations. These results indicated that (1) the general relationship between elasticity and temporal variation in vital rates was not modified by environmental changes due to time-since-fire, and (2) high elasticity and high temporal variation in seedling recruitment in H. cumulicola is a particular trait of the species' life history. After seed survival in the soil seed bank, seedling recruitment represents the most important life-history trait influencing H. cumulicola population growth rate (and fitness). The high temporal variability in seedling recruitment suggests that this trait is determined by environmental cues, leading to an increase in population size and subsequent replenishment of the seed bank in favorable years MH - Mexico|Chiapas MH - Netherlands MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 4 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000186118000007 L2 - HYPERICUM-CUMULICOLA; FLORIDA SCRUB; PERTURBATION ANALYSIS; RELATIVE IMPORTANCE; GROWTH RATE; FIRE; DEMOGRAPHY; MODELS; VARIANCE; CONSERVATION SO - Oikos 2003 ;103(1):69-74 9142 UI - 9335 AU - Picquart M AU - Lefevre T AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Laval, Fac Sci & Genie, CERSIM, Quebec City, PQ G1K 7P4, CanadaPicquart, M, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Raman and Fourier transform infrared study of phytol effects on saturated and unsaturated lipid multibilayers AB - The effects of phytol on DPPC and OPPC multilayers were investigated using FT-IR and Raman spectroscopy. The results were compared with those obtained with alpha-tocopherol (alpha-T) and alpha-tocopherol acetate (alpha-TA). The chain packing was analyzed using Raman intensity ratios measured in the CH2 stretching region, whereas the number of gauche bonds introduced by phytol was estimated by the measure of the FT-IR absorbance of the CH2 wagging progression modes. It is shown that the chain packing is reduced and that gauche rotamer formation is promoted by phytol in the gel phase. Phytol has a very similar effect on the acyl chains of DPPC to alpha-T but does not have the same impact on the C=O stretching vibrations of this lipid. The results indicate that phytol perturbs the interfacial region of DPPC causing dehydration or a conformational modification of the ester groups. Furthermore, the modification of the OPPC chain order induced by phytol is slightly different with respect to alpha-T. It is concluded that (1) a hydrogen bond between the hydroxyl group of alpha-T and the phospholipid carbonyl groups may not necessarily be associated with the stabilization of the membrane, (2) the studied phytyl compounds may be located more or less close to the membrane interface, (3) the presence of the chromanol ring may strongly influence the location of vitamin E within the membrane and, consequently, its capacity to catch free radicals and (4) the hydroxyl group, chroman moiety and phytyl chain all play a crucial role that determines the effects of alpha-T on lipid acyl chains and its location within membranes, which in turn can affect its biological function. Copyright (C) 2002 John Wiley Sons, Ltd MH - Canada MH - Mexico|Distrito Federal PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 0377-0486 UR - ISI:000180549300002 L2 - Raman scattering;FTIR spectroscopy;model membranes;phytol;vitamin E;tocopherol;lipid chain;conformational order;ester group;ALPHA-TOCOPHEROL; VITAMIN-E; LECITHIN LIPOSOMES; PHASE-TRANSITION; OLEIC-ACID; MEMBRANES; SPECTROSCOPY; BILAYERS; SPECTRA; PHOSPHATIDYLCHOLINES SO - Journal of Raman Spectroscopy 2003 ;34(1):4-12 9143 UI - 7747 AU - Pietrogrande MC AU - Tellini I AU - Szopa C AU - Felinger A AU - Coll P AU - Navarro-Gonzalez R AU - Sternberg R AU - Vidal-Madjar C AU - Raulin F AU - Dondi F AD - Univ Ferrara, Dept Chem, I-44100 Ferrara, ItalyUniv Paris 07, CNRS, UMR 7583, LISA, F-94010 Creteil, FranceUniv Paris 12, CNRS, UMR 7583, LISA, F-94010 Creteil, FranceUniv Veszprem, Dept Analyt Chem, H-8201 Veszprem, HungaryUniv Nacl Autonoma Mexico, LQPEP, Mexico City 04510, DF, MexicoCNRS, UMR 7581, LRP, F-94320 Thiais, FrancePietrogrande, MC, Univ Ferrara, Dept Chem, Via L Borsari 46, I-44100 Ferrara, Italy TI - Interpretation of chromatographic data recovered from space missions: decoding of complex chromatograms by Fourier analysis AB - In the near future, space probes will be used to investigate Titan and the P/Wirtanen comet because they are of interest for the fields of planetology and exo/astrobiology. One of the main objectives of these probes is to characterize the chemical composition of these extraterrestrial environments. The scientific payload of the probes will carry gas chromatography (GC) as one of the main experiments focused on this characterization through the separation and identification of the many species present in these environments. Despite the development of proper instrumentation for space applications, limitations and instrumental constraints imposed by the space environment prevent optimal separation of the analyzed species. Therefore, complex chromatograms are obtained from in situ space analysis and a mathematical approach is required to decode the signals and interpret all the data recovered by the space instruments. This paper describes a chemometric approach based on Fourier analysis and applications specifically developed to interpret the complex chromatograms. that will be collected during space missions. This approach can be used to determine the number of species present in the chromatogram and other analytical properties, but can also be used to find repeated structures in the retention pattern, representative of common chemical features between the chromatographic peaks and the corresponding compounds. Therefore, within the framework of experiments for the calibration of the Cassini-Huygens GC-MS and ACP experiments, this approach was applied to the interpretation of data related to GC analysis of Titan's tholins produced in the laboratory. The procedure was also directly applied to isothermal chromatograms simulating the GC analyses of complex samples, obtained with standard species, which could be operated by the Rosetta Lander probe to investigate the nucleus of the comet P/Wirtanen (COSAC experiments). It is thus demonstrated that this method is helpful both in the chemical characterization of analogues of extraterrestrial matter produced in laboratory, simulation aimed at calibrating space instruments and in the interpretation of data collected during space missions. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Hungary MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000184621000006 L2 - data interpretation;chemical composition;extraterrestrial environments;gas chromatography;complex chromatogram decoding;IN-SITU ANALYSIS; MULTICOMPONENT CHROMATOGRAMS; TITANS ATMOSPHERE; GAS-CHROMATOGRAPHY; MASS-SPECTROMETER; HUYGENS; CAPILLARY; COLUMNS; SIMULATIONS; LANDER SO - Planetary and Space Science 2003 ;51(9-10):581-590 9144 UI - 6565 AU - Pimentel AE AU - Levine L AU - Cruces MP AU - Salceda VM AD - Inst Nacl Invest Nucl, Dept Biol, Mexico City 11801, DF, MexicoCUNY City Coll, Dept Biol, New York, NY 10031, USAPimentel, AE, Inst Nacl Invest Nucl, Dept Biol, Mexico City 11801, DF, Mexico TI - Radioresistance of sibling Drosophila species from Laguna Verde, Veracruz, Mexico AB - Purpose: To identify and quantify if the generation of electricity by nuclear power plants produces an increase in background radiation that might affect the radioresistance of organisms that live in that area. Materials and methods: Natural populations of two sibling species of Drosophila, D. melanogaster and D. simulans, living in the immediate vicinity of the Mexican Nuclear Power Plant in Laguna Verde were studied for 10 years. Collections of flies were made at two sites, one close to and one further from two reactors, during both the pre-operational and operational stages of the reactors. The effect of exposure to various doses of gamma-rays on egg-to-adult survival of the flies was analysed. Results: The data obtained indicate that in both sites, egg-to-adult survival was higher in D. melanogaster than in D. simulans. There was an increase in the egg-to-adult survival during the preoperational period of one of the reactors and the possible causes are discussed. No differences were found between the two sites. Conclusions: The analysis indicates that the reactors do not have a negative impact on the Drosophila populations studied MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Biology;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0955-3002 UR - ISI:000187842000008 L2 - NUCLEAR-POWER PLANTS; ADAPTIVE RESPONSE; SUPEROXIDE-DISMUTASE; BACKGROUND-RADIATION; NATURAL-POPULATIONS; HUMAN-LYMPHOCYTES; X-RAYS; IRRADIATION; MELANOGASTER; RESISTANCE SO - International Journal of Radiation Biology 2003 ;79(12):1003-1009 9145 UI - 7841 AU - Pimienta-Barrios E AU - Del Castillo-Aranda MEG AU - Munoz-Urias A AU - Nobel PA AD - Univ Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Dept Ecol, Zapopan 45110, Jalisco, MexicoUniv Calif Los Angeles, Dept Organism Biol Ecol & Evolut, Los Angeles, CA 90095, USAPimienta-Barrios, E, Cerrada Maestranza 1098,Residencial Guadalupe Jar, Zapopan 45030, Jalisco, Mexico TI - Effects of benomyl and drought on the mycorrhizal development and daily net CO2 uptake of a wild platyopuntia in a rocky semi-arid environment AB - The effects of drought and the fungicide benomyl on a wild platyopuntia, Opuntia robusta Wendl., growing in a rocky semi-arid environment were assessed. Cladode phosphorus content, cladode water potential and daily net CO2 uptake were measured monthly in 2000 and 2001 before, during and after the summer rainy period. During 2000, the formation of new roots and new cladodes was severely suppressed in response to a prolonged drought, impairing the development of the symbiotic relationship between the arbuscular mycorrhizal (AM) fungi and the roots. Hence no effect of benomyl application was observed on daily carbon assimilation by this Crassulacean acid metabolism plant. During 2001, drought was interrupted, and new cladodes and roots were formed in response to rainfall. Benomyl was highly effective in suppressing root colonization by AM-fungi; however, daily C assimilation was reduced by benomyl application only in October. Thus, the inhibition of AM-fungal colonization by benomyl did not affect photosynthesis, water uptake and P uptake under prolonged drought. (C) 2003 Annals of Botany Company MH - Mexico|Jalisco MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0305-7364 UR - ISI:000184491700009 L2 - arbuscular mycorrhizae;benomyl;CO2 uptake;drought;Opuntia robusta Wendt.;phosphorus;rocky environmenth;VESICULAR ARBUSCULAR MYCORRHIZAS; GAS-EXCHANGE; STENOCEREUS-QUERETAROENSIS; FUNGICIDE BENOMYL; WATER-UPTAKE; CARBON COST; GROWTH; PLANTS; FIELD; COLONIZATION SO - Annals of Botany 2003 ;92(2):239-245 9146 UI - 7844 AU - Pincik E AU - Kobayashi H AU - Mullerova J AU - Gmucova K AU - Jergel M AU - Brunner R AU - Zeman M AU - Zahoran M AD - Slovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaOsaka Univ, Inst Sci & Ind Res, Osaka 5670047, JapanMil Acad, Fac Logist, Dept Phys, SK-03101 Liptovsky, Mikulas, SlovakiaIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoDelft Univ Technol, DIMES, NL-2600 GB Delft, NetherlandsComenius Univ, Fac Math Phys & Informat, Bratislava, SlovakiaPincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84228, Slovakia TI - On optical, electrical and structural properties of amorphous silicon based semiconductors AB - The paper deals with structural and electrical properties of original, ion beam, and plasma exposed hydrogenated amorphous silicon (a-Si:H) surface. The a-Si:H semiconductor forms the intrinsic layer in amorphous silicon solar cells whose performance depends on the defect distribution, particularly on the density of dangling bonds. Device-quality intrinsic a-Si:H layer of approx. 1 mum thickness was deposited on n-type Si(100) oriented crystals in 13,56 MHz rf excited parallel plate plasma enhanced chemical vapor deposition system. Two types of surface exposures were made: by oxygen and argon plasmas. The Ar plasma-damaged surfaces were covered by an oxide layer prepared by in-situ exposure to pure oxygen atmosphere. In all cases, an uppermost very thin oxide overlayer of 5-10 nm thickness was formed, thicker than the native oxide formed after the PECVD of the amorphous layer. The optical and structural properties of original and damaged surfaces were investigated by reflectance spectroscopy and X-ray diffraction at grazing incidence, respectively. An important transformation of structural properties of a-Si:H on Si(100) was investigated via the evolution of diffraction pattern around 2Theta = 28.5degrees. Electrical properties were determined by the charge version of deep level transient spectroscopy, C-V and I-V measurements. Bias annealing procedures lead to the a MIS structure without deep states at the interface. The results obtained are compared with these measured on ion beam exposed a-Si:H surfaces [V. Nadazdy, R. Durny, E. Pincik, Phys. Rev. Letters 78; 1102 (1997)] MH - Japan MH - Mexico|Distrito Federal MH - Netherlands MH - Slovakia PB - BRATISLAVA: SLOVAK ACAD SCIENCES INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0323-0465 UR - ISI:000184444600001 L2 - DEFECT-POOL MODEL; GAP STATES; SI-H; SPECTRA; FILM; VOLTCOULOMETRY; CONSTANTS; DENSITY SO - Acta Physica Slovaca 2003 ;53(4):267-278 9147 UI - 8085 AU - Pincik E AU - Jergel M AU - Falcony C AU - Ortega L AU - Ivanco J AU - Brunner R AU - Kucera M AD - Slovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoCNRS, Cristallog Lab, F-38042 Grenoble, FranceSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaPincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84228, Slovakia TI - Low-energy particle treatment of GaAs surface AB - Modification of high-doped GaAs surface by the interaction with RF plasma and a monoenergetic beam of similar chemical composition (Ar with a low content of H-2) was investigated via the evolution of optical, electrical and structural properties. A reduction in the free charge concentration in the GaAs surface region of similar to100 nm in thickness is concluded from Raman spectroscopy. In the processed samples, the surface electric field strength induced by a laser beam (photoreflectance technique) continually decreases with both the energy and fluence of impinging particles. The same results were obtained by evaluation of quasistatic C-V curves of corresponding MOS structures. They confirmed that longer exposure caused the formation of similar to100-nm-thick modified near-surface region with a decreased donor concentration. After the plasma irradiation, an similar to10-nm-thick outermost insulating layer was created in situ. The formation of textured polycrystalline grains with (100) orientation in the surface region was observed by X-ray diffraction. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Slovakia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183716900020 L2 - GaAs;plasma;Raman spectroscopy;photoreflectance;photoluminescence;LIQUID-PHASE EPITAXY; N-TYPE GAAS; DONOR-ACCEPTOR; GALLIUM-ARSENIDE; PHOTOLUMINESCENCE; RECOMBINATION; LUMINESCENCE; BEAM; SEMICONDUCTORS; PASSIVATION SO - Thin Solid Films 2003 ;433(1-2):108-113 9148 UI - 8088 AU - Pincik E AU - Kobayashi H AU - Gleskova H AU - Kucera M AU - Ortega L AU - Jergel M AU - Falcony C AU - Brunner R AU - Shimizu T AU - Nadazdy V AU - Zeman M AU - Mikula M AU - Kumeda M AU - van Swaaij RACM AD - Slovak Acad Sci, Inst Phys, Bratislava 84228, SlovakiaOsaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, JapanPrinceton Univ, Dept Elect Engn, Princeton, NJ 08544, USASlovak Acad Sci, Inst Elect Engn, Bratislava 84239, SlovakiaCNRS, Crystallog Lab, F-38042 Grenoble 09, FranceCINVESTAV IPN, Dept Fis, Mexico City 07300, DF, MexicoKanazawa Univ, Fac Engn, Kanazawa, Ishikawa 9208667, JapanDelft Univ Technol, Lab Elect Components Technol & Mat DIMES, NL-2600 GB Delft, NetherlandsSlovak Tech Univ, FCHFT, Dept Graph Arts Technol & Appl Photochem, Bratislava 81237, SlovakiaBrunner, R, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84228, Slovakia TI - Photoluminescence properties of a-Si : H based thin films and corresponding solar cells AB - Amorphous hydrogenated silicon (a-Si:H) is a well-known semiconductor with metastable properties. Direct surface exposure, as it occurs e.g. in rf plasma equipments, introduces damage due to the charged particle bombardment. The paper deals with photoluminiscence properties of virgin, oxide layer covered and chemically treated (in KCN solutions) surfaces of a-Si:H and corresponding solar cell structures. The cyanide treatment improves the electrical characteristics of MOS structures as well as solar cells. X-ray diffraction at grazing incidence and reflectance spectroscopy complete the study. The photoluminescence measurements were performed at liquid helium temperatures at 6 K using an Ar laser and lock-in signal recording device containing the PbS and Ge photodetectors. Photoluminescence bands were observed as broad luminescent peaks between 1.05-1.7 eV. Two new peaks were detected at 1.38 and 1.42 eV. The evolution of the band at similar to1.2 eV related to microcrystalline silicon is investigated. The fitting and simulation of photoluminiscence spectra are presented. The surface luminescent properties of a-Si:H based structures (double layers, single thin film solar cells) before and after the passivation are compared with those of very thin oxide layers and chemically treated surfaces. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Japan MH - Mexico|Distrito Federal MH - Netherlands MH - Slovakia MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183716900062 L2 - a-Si : H;KCN treatment;solar cell;photoluminescence;X-ray diffraction;HYDROGENATED AMORPHOUS-SILICON; MICROCRYSTALLINE SILICON; DEFECT STATES; LUMINESCENCE; LAYERS; RECOMBINATION; TRANSITION SO - Thin Solid Films 2003 ;433(1-2):344-351 9149 UI - 9039 AU - Pineda-Flores JL AU - Chavira E AU - Reyes-Gasga J AU - Gonzalez AM AU - Huanosta-Tera A AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Politecn Madrid, EUIT Telecomunicac, Madrid 28031, SpainPineda-Flores, JL, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Synthesis and dielectric characteristics of the layered structure Bi4-xRxTi3O12 (R-x = Pr, Nd, Gd, Dy) AB - Four Aurivillius type systems with generic formula Bi4-xRxTi3O12, where R-x = Pr, Nd, Gd, and Dy, have been synthesised to investigate the physical effects of R-x on the host lattice Bi4Ti3O12. Particularly we report here the crystallographic characteristics, as measured by X-ray, and the dielectric properties of the resulting compounds. The layered orthorhombic structures show variations of the a/b distortion comparable with that of Bi4Ti3O12. Impedance spectroscopy is used to display the electrical response over a wide temperature range, from room temperature up to 850 degreesC. The conductivity diminishes as the size of R, grows; activation energies are reported. The rare earth concentration determines the ferroelectric characteristics of the compounds: for small x, they behave as typical ferroelectrics, but all of them tend to become relaxors when x grows. The structure seems to favour the appearance of ferroelectricity when the atomic size of the rare earth diminishes. SEM reveals microscopic composition fluctuations in all samples. Using the specimens as if they were the detectors of the electron microscope, we have determined the type of charge carrier involved in the conductivity, phenomena. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000181227500004 L2 - Bi4Ti3O12;dielectric properties;ferroelectric properties;layered structures;relaxors;CRYSTAL-CHEMISTRY; BISMUTH TITANATE; BI4TI3O12; FERROELECTRICS SO - Journal of the European Ceramic Society 2003 ;23(6):839-850 9150 UI - 6941 AU - Pinto AR AU - Reyes-Sandoval A AU - Ertl HCJ AD - Wistar Inst Anat & Biol, Philadelphia, PA 19104, USAInst Adolfo Lutz Registro, Sao Paulo, BrazilEscuela nacl Med & Homeopatia, Inst Politecn Nacl, Programa Inst Biomed Mol, Mexico City, DF, MexicoErtl, HCJ, Wistar Inst Anat & Biol, 3601 Spruce St,Room 283, Philadelphia, PA 19104 USA TI - Chemokines and TRANCE as genetic adjuvants for a DNA vaccine to rabies virus AB - An adaptive immune response is initiated by mature dendritic cells presenting processed antigen to naive T cells. Assuming that the magnitude of the immune response is influenced by the number and type of antigen-presenting dendritic cells and by the duration of antigen presentation, we tested if chemokines that bind to receptors expressed on immature dendritic cells or TRANCE, a survival factor for mature dendritic cells, can serve as adjuvants. None of the immunomodulaters given as genetic adjuvants with a DNA vaccine encoding the full-length rabies virus glycoprotein augmented the transgene product-specific response. However, RANTES, MCP-1, MIP 1-beta, and TRANCE given together with a DNA vaccine expressing a truncated and thus secreted version of the rabies virus glycoprotein enhanced the response suggesting that the tested genetic adjuvants promoted preferentially presentation of reprocessed antigen originating from transduced tissue cells. (C) 2003 Elsevier Inc. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Cell Biology;Immunology U5 - J;Article AV - English IS - 0008-8749 UR - ISI:000186596700005 L2 - TUMOR-NECROSIS-FACTOR; FACTOR FAMILY-MEMBER; DENDRITIC CELLS; IMMUNE-RESPONSES; T-CELLS; EXPRESSION PLASMID; INTERFERON-GAMMA; IN-VIVO; ANTIGEN; ACTIVATION SO - Cellular Immunology 2003 ;224(2):106-113 9151 UI - 8232 AU - Piotrowicz-Cieslak AI AU - Lopez PMG AU - Gulewicz K AD - Univ Warmia & Masuria, Dept Plant Physiol & Biotechnol, PL-10718 Olsztyn, PolandUniv Guadalajara, Dept Bot & Zool, Guadalajara 45100, Jalisco, MexicoPolish Acad Sci, Inst Bioorgan Chem, PL-61704 Poznan, PolandPiotrowicz-Cieslak, AI, Univ Warmia & Masuria, Dept Plant Physiol & Biotechnol, Pl Lodzki 3, PL-10718 Olsztyn, Poland TI - Cyclitols, galactosyl cyclitols and raffinose family oligosaccharides in Mexican wild lupin seeds AB - Ten to 16 ethanol-soluble carbohydrate components were identified in the seeds of six Mexican wild lupins. The analysed carbohydrates included: monosaccbarides, disaccharides, cyclitols, galactosyl cyclitols and raffinose family oligosaccharides. Stachyose and sucrose were the main carbohydrate component in the Lupinus montanus, L. rotundiflorus, L. exaltatus, L. mexicanus and L. elegans seeds. Only trace quantities of verbascose were detected in Lupinus mexicanus seeds. The analysed seeds accumulated 38 to 78 mg/g d.m. carbohydrates. The raffinose family oligosaccharides constituted 41 to 85.2% of the identified carbohydrate component pool. The analysed Lupinus seeds contained 3 to 8 unidentified carbohydrate components MH - Mexico|Jalisco MH - Poland PB - WARSAW: POLSKIE TOWARZYSTWO BOTANICZNE RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0001-6977 UR - ISI:000183575400004 L2 - wild lupin seeds;carbohydrates;raffinose family oligosaccharides;galactosyl cyclitols;cyclitols;DESICCATION TOLERANCE; SOYBEAN SEEDS SO - Acta Societatis Botanicorum Poloniae 2003 ;72(2):109-114 9152 UI - 6889 AU - Piscitelli D AU - Phelps AV AU - de Urquijo J AU - Basurto E AU - Pitchford LC AD - CNRS, UMR 5002, CPAT, F-31062 Toulouse, FranceUniv Colorado, JILA, Boulder, CO 80309, USANatl Inst Technol, Boulder, CO, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 803090440, Morelos, MexicoUniv Autonoma Metropolitana, Dept Ciencias Basicas, Mexico City 02200, DF, MexicoPiscitelli, D, CNRS, UMR 5002, CPAT, 118 Route Narbonne, F-31062 Toulouse, France TI - Ion mobilities in Xe/Ne and other rare-gas mixtures AB - The ion mobility or drift velocity data important for modeling glow discharges in rare gas mixtures are not generally available, nor are the ion-neutral scattering cross sections needed to calculate these data. In this paper we propose a set of cross sections for Xe+ and Ne+ collisions with Xe and Ne atoms. Ion mobilities at 300 K calculated using this cross section set in a Monte Carlo simulation are reported for reduced field strengths, E/N, up to 1500x10(-21) V m(2), in pure gases and in Xe/Ne mixtures containing 5% and 20% Xe/Ne, which are mixtures of interest for plasma display panels (PDPs). The calculated Xe+ mobilities depend strongly on the mixture composition, but the Ne+ mobility varies only slightly with increasing Xe in the mixture over the range studied here. The mobilities in pure gases compare well with available experimental values, and mobilities in gas mixtures at low E/N compare well with our recent measurements which will be published separately. Results from these calculations of ion mobilities are used to evaluate the predictions of Blanc's law and of the mixture rule proposed by Mason and Hahn [Phys. Rev. A 5, 438 (1972)] for determining the ion mobilities in mixtures from a knowledge of the mobilities in each of the pure gases. The mixture rule of Mason and Hahn is accurate to better than 10% at high field strengths over a wide range of conditions of interest for modeling PDPs. We conclude that a good estimate of ion mobilities at high E/N in Xe/Ne and other binary rare gas mixtures can be obtained using this mixture rule combined with known values of mobilities in parent gases and with the Langevin form for mobility of rare gas ions ion in other gases. This conclusion is supported by results in Ar/Ne mixtures which are also presented here MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000186571200069 L2 - RESONANT CHARGE-TRANSFER; CROSS-SECTIONS; ATOMIC IONS; COLLISIONS; SCATTERING; XENON; NEON; TRANSPORT; EXCHANGE; ENERGIES SO - Physical Review e 2003 ;68(4): 9153 UI - 8837 AU - Pittard JM AU - Arthur SJ AU - Dyson JE AU - Falle SAEG AU - Hartquist TW AU - Knight MI AU - Pexton M AD - Univ Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, EnglandUNAM, Inst Astron, Morelia 58090, Michoacan, MexicoUniv Leeds, Dept Appl Math, Leeds LS2 9JT, W Yorkshire, EnglandPittard, JM, Univ Leeds, Dept Phys & Astron, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England TI - The evolution of mass loaded supernova remnants - II. Temperature dependent mass injection rates AB - We investigate the evolution of spherically symmetric supernova remnants in which mass loading takes place due to conductively driven evaporation of embedded clouds. Numerical simulations reveal significant differences between the evolution of conductively mass loaded and the ablatively mass loaded remnants studied in Paper I. A main difference is the way in which conductive mass loading is extinguished at fairly early times, once the interior temperature of the remnant falls below similar to10(7) K. Thus, at late times remnants that ablatively mass load are dominated by loaded mass and thermal energy, while those that conductively mass load are dominated by swept-up mass and kinetic energy. Simple approximations to the remnant evolution, complementary to those in Paper I, are given MH - United Kingdom MH - Mexico|Michoacan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000181929900022 L2 - ISM : kinematics and dynamics;ISM : supernova remnants;galaxies : ISM;INTERSTELLAR-MEDIUM; ASTRONOMICAL FLOWS; EVAPORATION; REGIONS; SCHEME; CLOUDS; MODEL; GAS SO - Astronomy & Astrophysics 2003 ;401(3):1027-1038 9154 UI - 8672 AU - Pizio O AU - Reszko-Zygmunt J AU - Patrykiejew A AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUNAM, Inst Quim, Mexico City 04511, DF, MexicoReszko-Zygmunt, J, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Microscopic structure and properties of an interface between coexisting phases of an associating fluid adsorbed in slitlike pores AB - Using density functional theory, we calculate density profiles of an associating fluid in slitlike pores. These profiles characterize an interface between two coexisting, adsorbed phases, e.g., between gaseous and liquid phases formed during capillary condensation. Our study has been carried out for weakly, as well as for strongly, associated fluids confined in pores of different widths. We also investigate the role of the fluid-wall interaction. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000182258100015 L2 - DENSITY-FUNCTIONAL THEORY; PERTURBATION-THEORY; TRANSITIONS; SEPARATION; PROFILES SO - Journal of Colloid and Interface Science 2003 ;260(1):126-134 9155 UI - 7628 AU - Planat M AU - Rosu HC AD - IPICyT, Appl Math, Tangamanga, San Luis Potosi, MexicoCNRS, Lab Phys & Metrol Oscillateurs, F-25044 Besancon, FranceRosu, HC, IPICyT, Appl Math, Apartado Postal 3-74, Tangamanga, San Luis Potosi, Mexico TI - Cyclotomy and Ramanujan sums in quantum phase locking AB - Phase-locking governs the phase noise in classical clocks through effects described in precise mathematical terms. We seek here a quantum counterpart of these effects by working in a finite Hilbert space. We use a coprimality condition to define phase-locked quantum states and the corresponding Pegg-Barnett type phase operator. Cyclotomic symmetries in matrix elements are revealed and related to Ramanujan sums in the theory of prime numbers. The employed mathematical procedures also emphasize the isomorphism between algebraic number theory and the theory of quantum entanglement. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000184880300001 L2 - cyclotomy;Ramanujan sums;phase locking SO - Physics Letters A 2003 ;315(1-2):1-5 9156 UI - 6730 AU - Plascencia A AU - Mendoza GD AU - Vasquez C AU - Zinn RA AD - Univ Calif, Desert Res & Extens Ctr, Dept Anim Sci, El Centro, CA 92243, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoColegio Postgrad, Programa Ganaderia, Montecillo, MexicoUABC, Inst Invest Ciencias Vet, Mexicali, Baja California, MexicoPlascencia, A, Univ Calif, Desert Res & Extens Ctr, Dept Anim Sci, El Centro, CA 92243 USA TI - Relationship between body weight and level of fat supplementation on fatty acid digestion in feedlot cattle AB - Eight Holstein steers with cannulas in the rumen and proximal duodenum were used in a split-plot design experiment to evaluate the interaction of body weight, (175 vs. 370 kg) and level of fat supplementation (0, 3, 6, and 9% yellow grease) on characteristics of digestion and feeding value of fat in finishing diets. Dry matter intake was restricted to 2% of BW. There were no interactions between BW and level of fat supplementation (P > 0.10) on ruminal or total-tract digestion. Level of supplemental fat decreased (linear, P < 0.01) ruminal digestion of OM and NDF, and increased (linear, P < 0.05) ruminal N efficiency. There were no treatment effects (P > 0.10) on postruminal digestion of OM, NDF, and N. There tended to be an interaction (P < 0.10) between BW and level of fat supplementation on postruminal starch digestion. Increasing level of fat supplementation increased postruminal digestion of starch in heavier steers but did not affect starch digestion in lighter steers. There were no interactions (P > 0.10) between BW and level of fat supplementation on postruminal fatty acid digestion. Increasing level of fat supplementation decreased (linear, P < 0.01) postruminal fatty acid digestion, which was due to a decreased (linear, P < 0.01) postruminal digestion of C16:0 and C18:0. Supplemental fat decreased (linear, P < 0.01) total-tract digestion of OM and NDF. The estimated NEm (Meal/kg) of yellow grease averaged (linear, P < 0.01) 6.02, 5.70, and 5.06 for the 3, 6, and 9% of level supplementation, respectively. We conclude that intestinal fatty acid digestion (FAD, %) is a predictable function (r(2) = 0.89; p < 0.01) of total fatty acid intake per unit body weight (FAI, g/kg BW): FAD = 87.560 - 8.591FAI. Depressions in fatty acid digestion with increasing level of intake were due primarily to decreased intestinal absorption of palmitic and stearic acid. Level of fatty acids intake did not appreciably affect intestinal absorption of unsaturated fatty acid. Changes in intestinal fatty acid digestion accounted for most of the variation in the NE value of supplemental fat MH - USA MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000187174100001 L2 - body weight;cattle;digestion;fatty acid;COMPARATIVE FEEDING VALUE; FINISHING DIETS; DAIRY-COWS; WHOLE COTTONSEED; RUMEN BACTERIA; STEERS; DIGESTIBILITY; PROTEIN; BIOHYDROGENATION; PERFORMANCE SO - Journal of Animal Science 2003 ;81(11):2653-2659 9157 UI - 8489 AU - Plesch G AU - Chromik S AU - Strbik V AU - Kunc M AU - Jergel M AU - Kostic I AD - Comenius Univ, Fac Nat Sci, Dept Inorgan Chem, Bratislava 84215, SlovakiaSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaIPN, CINVESTAV, Dept Fis, Mexico City 07738, DF, MexicoSlovak Acad Sci, Inst Informat, Bratislava 84237, SlovakiaPlesch, G, Comenius Univ, Fac Nat Sci, Dept Inorgan Chem, Bratislava 84215, Slovakia TI - The effect of (Ba/Sr) substitution on Tl-based superconducting thin films prepared from fluoride precursors AB - Tl-2212 and Tl-1212 c oriented thin films were prepared by the thalliation of (Ba1-xSrx)(2)Ca2Cu3(O/F)(z) precursor layers, which were deposited on single-crystal CeO2-buffered sapphire substrate by sequential thermal evaporation of BaF2, SrF2, CaF2 and Cu components. The partial defluorination of the precursor did not significantly influence the phase composition and the superconducting properties of the obtained Tl-2212 films. The prepared Tl-2212 layers exhibit T-C(0) 98 K for a sample without Sr and falls to T-C(0) = 78 K for a partially Sr substituted films (x = 0.4). The increasing Sr content in the precursor stabilises the Tl-1212 phase. The samples prepared from defluorinated precursors show T-C(0) values in the range 47-55 K depending on the Sr content. On the other hand the Tl-1212 films synthesized from fluorinated precursors show greater transition widths to the superconducting state and therefore their T-C(0) values are shifted to 38-41 K. This is caused probably by the increased amount of amorphous non-superconducting admixtures, which can be seen by SEM in form of precipitates on the film MH - Mexico|Distrito Federal MH - Slovakia PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - S;Article AV - English IS - 1012-0394 UR - ISI:000182684200095 L2 - Tl-based superconductors;Tl-2212;Tl-1212;thin films;fluoride based precursors;(Ba/Sr) substitution SO - Solid State Chemistry V 2003 ;90-91():571-575 9158 UI - 7571 AU - Plionis M AU - Benoist C AU - Maurogordato S AU - Ferrari C AU - Basilakos S AD - INAOE, Puebla 72000, MexicoNatl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceCERGA, Observ Cote Azur, Nice 4, FrancePlionis, M, INAOE, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Galaxy alignments as a probe of the dynamical state of clusters AB - We present indications, based on a sample of 303 Abell clusters, for a relation between the dynamical state of clusters and the alignments of galaxy members with their parent cluster major-axis orientation as well as with the large-scale environment within which the clusters are embedded. The statistical results are complemented with a deep, wide-field case study of galaxy alignments in the cluster A521, which is characterized by multiple merging events ( Maurogrdato et al.; Ferrari et al.) and whose galaxy members show a strong alignment signal out to similar to5 h(-1) Mpc. Our results show that galaxy alignments appear to be stronger the more dynamically young the cluster is, especially when found in high-density environments. This relation complements the recently found "cluster substructure - alignment connection'' (Plionis & Basilakos) by which dynamically young clusters, found in high-density environments, show stronger cluster-cluster alignments MH - France MH - Greece MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185087400013 L2 - galaxies : clusters : general;large-scale structure of universe;INTRINSIC ALIGNMENTS; ANGULAR-MOMENTUM; ABELL CLUSTERS; ORIENTATION; SUBSTRUCTURE; SCALE; MORPHOLOGY; REDSHIFTS; CATALOG; SHAPE SO - Astrophysical Journal 2003 ;594(1):144-153 9159 UI - 8307 AU - Poblano A AU - Rothenberg SJ AU - Fonseca ME AU - Cruz ML AU - Flores T AU - Zarco I AD - King Drew Univ Med & Sci, Dept Anesthesiol, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Cuernavaca, Morelos, MexicoCharles R Drew Univ Med & Sci, Los Angeles, CA 90059, USAIMSS, Natl Med Ctr, Mexico City, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoNatl Ctr Rehabil, Mexico City, DF, MexicoRothenberg, SJ, King Drew Univ Med & Sci, Dept Anesthesiol, 1621 E 120th St, Los Angeles, CA 90059 USA TI - Salivary testosterone.and EEG spectra of 9-to 11-year-old male children AB - Although most investigators agree that there are electroencephalogram (EEG) changes with chronological age around puberty, no one has remarked on why this is so. As the increase in testosterone at the end of prepubertal childhood is a biomarker for the onset of a period of accelerated growth and development, we searched for an association between testosterone level and the spectral power and topography of EEG. We tested 60 children between 9- and 11-years-old, each demonstrating normal neurological examination and Wechsler intelligence scale over 90. Salivary testosterone was measured using immunoenzymatic chemiluminescent assay. Children were divided into 3 groups according to measured testosterone level. EEG was processed with a Fast Fourier Transform; average of relative power spectral analyses were calculated and data divided into delta, theta, alpha, and beta bands. The principal finding was the highly significant interaction between EEG band and testosterone group, F(6, 171) = 4.54, Huynh-Feldt epsilon = 0.853, p = .001. Delta relative power decreased significantly and Alpha relative power increased significantly in the 2 groups with higher salivary testosterone concentration when compared to the lowest testosterone group. This work suggests that increased testosterone in prepubertal children can predict some of the same EEG changes that are usually associated with increased chronological age MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Developmental;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 8756-5641 UR - ISI:000183231800004 L2 - SCHOOL-AGE CHILDREN; ADOLESCENTS; HORMONES; BOYS SO - Developmental Neuropsychology 2003 ;23(3):375-384 9160 UI - 7662 AU - Poindron P AU - Gilling G AU - Hernandez H AU - Serafin N AU - Terrazas A AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, UAQ, Queretaro 76230, QRO, MexicoUniv Tours, CNRS, UMR 6073, INRA,Lab Comportement Anim, F-37380 Nouzilly, FrancePoindron, P, Univ Nacl Autonoma Mexico, Inst Neurobiol, UAQ, Campus Juriquilla Km 15, Queretaro 76230, QRO, Mexico TI - Early recognition of newborn goat kids by their mother: I. Nonolfactory discrimination AB - Mother sheep and goats develop an early bond with their neonate on the basis of olfactory recognition. We investigated whether goats were also able to show early (<24 hr postpartum) nonolfactory discrimination of their kids, as already reported in sheep. In a first experiment, we found that goats are not able to recognize their kid at I m away on the basis of olfactory. cues alone. By contrast, they showed a significant preference for their own kid in a two-choice test as early as 4 hr postpartum, and prepartum maternal anosmia did not impede the ability of mothers to show discrimination. We conclude that goats, like sheep, are fully able to discriminate their neonate without the help of olfactory cues very early after parturition. The difference in the early spatial mother-young relationship between the two species due to the different behavior of the young (kids = hiders, lambs followers), is not associated with marked differences in the dynamics or mechanisms controlling the development of recognition of the neonate by its mother. (C) 2003 Wiley Periodicals, Inc MH - France MH - Mexico|Queretaro PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 10 U4 - Developmental Biology;Psychology U5 - J;Article AV - English IS - 0012-1630 UR - ISI:000184908600002 L2 - goat;maternal recognition;olfaction;sensory cues;hider;behavioral adaptation;EARLY MATERNAL DISCRIMINATION; OLFACTORY CUES; SHEEP; POSTPARTUM; BEHAVIOR; LAMBS; EWES; ANOSMIA; MERINO; RESPONSIVENESS SO - Developmental Psychobiology 2003 ;43(2):82-89 9161 UI - 6934 AU - Poland CD AU - Alcocer SM AD - Earthquake Engn Res Inst, Oakland, CA 94612, USADegenkolb Engineers, San Francisco, CA, USANatl Ctr Disaster Prevent Res, Mexico City, DF, MexicoPoland, CD, Earthquake Engn Res Inst, 499 14th St,Suite 320, Oakland, CA 94612 USA TI - International visions and goals for the earthquake engineering research institute AB - The Earthquake Engineering Research Institute (EERI) has recently added public advocacy for seismic safety to its rich history of facilitating the discussion amongst earthquake scientists and engineers. In recognition of its unique role as the authoritative source for information in the United States, EERI also seeks to partner with other nations to develop information for use worldwide. In 2002, EERI began forming cooperation agreements with organizations in other countries that encourage the exchange of information, collaborative efforts in learning from earthquakes, joint memberships, development of mitigation tools and techniques, and access to seminars, conferences, and technical publications. The ultimate goal of the program is to arrest the growth of seismic vulnerability worldwide and thereby save lives, protect capital investments, and minimize economic impacts MH - USA MH - Mexico|Distrito Federal PB - OAKLAND: EARTHQUAKE ENGINEERING RESEARCH INSTITUTE RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Civil;Engineering, Geological U5 - J;Article AV - English IS - 8755-2930 UR - ISI:000186514300001 SO - Earthquake Spectra 2003 ;19(2):221-229 9162 UI - 6773 AU - Poltev VI AU - Grokhlina TI AU - Deriabina A AU - Gonzalez E AD - BUAP, Fac Ciencias Fis Matemat, Fac Ciencias Fis Matemat, Puebla 72570, MexicoRussian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, RussiaRussian Acad Sci, Inst Math Problems Biol, Pushchino 142290, Moscow Region, RussiaGonzalez, E, BUAP, Fac Ciencias Fis Matemat, Fac Ciencias Fis Matemat, Ciudad Univ, Puebla 72570, Mexico TI - Caffeine interactions with nucleic acids. Molecular mechanics calculations of model systems for explanation of mechanisms of biological actions AB - To understand the molecular mechanisms of the influence of caffeine (CAF) on DNA functioning, molecular mechanics calculations of the interaction energy of CAF with nucleic acid bases and base pairs have been performed. The calculations reveal three types of mutual CAF-base (and CAF-base pair) arrangements corresponding to minima of the interaction energy. Besides well-known stacking mutual positions of the molecules, two other types of arrangements are revealed and studied. One of these arrangements corresponds to the nearly in-plane position of CAF and base (or base pair) and the formation of a single hydrogen bond. Another type of minimum corresponds to nearly perpendicular arrangements of the molecular planes and the formation of intermolecular hydrogen bonds. These two arrangements are possible both for individual nucleic acid monomers and for DNA duplexes. The calculations suggest the molecular mechanisms of the influence of CAF on DNA interactions with other biologically active molecules MH - Mexico|Puebla MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1432-881X UR - ISI:000186958300017 L2 - caffeine;DNA interactions;molecular mechanics;energy calculations;HETERO-ASSOCIATION; MITOXANTRONE; DOXORUBICIN; SIMULATION; COMPLEXES; BINDING; H-1-NMR; DRUGS SO - Theoretical Chemistry Accounts 2003 ;110(6):466-472 9163 UI - 7243 AU - Poltev VI AU - Danilov VI AU - Les A AU - Jurkiewicz A AU - Deryabina AS AU - Gonzalez E AD - Russian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, RussiaUniv Autonoma Puebla, Puebla 72570, MexicoNatl Acad Sci Ukraine, Inst Mol Biol & Genet, UA-003143 Kiev, UkraineUniv Warsaw, Dept Chem, PL-02093 Warsaw, PolandPoltev, VI, Russian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, Russia TI - Possible configurations of Gua-Cyt DNA base dimers. Computations by the methods of molecular mechanics and density functional theory AB - The energies of interactions between guanine and cytosine in various mutual positions were calculated by the methods of molecular mechanics with refined atom-atom potential functions and the quantum mechanics theory of density functional. Both methods indicate three types of mutual positions of bases in local energy minima. These types correspond to (1) nearly coplanar base positions with intermolecular hydrogen bond formation (base pairing); (2) arrangements of two bases in nearly parallel planes one above another (base stacking); and (3) nearly perpendicular positions of base planes. According to the calculations, the global energy minimum corresponds to the Watson-Crick base pair with three hydrogen bonds. A specific feature of the pair is a transition from many positions of type (2) to positions of type (1) without any energy barrier. This feature is revealed by both methods. Another special feature of this pair is a deviation, for most of mutual base positions, of the amine group atoms from the ring plane, the deviation being more pronounced for Gua. These features are important for understanding the conformational behavior of DNA fragments and the RNA structure MH - Mexico|Puebla MH - Poland MH - Russia MH - Ukraine PB - MOSCOW: MEZHDUNARODNAYA KNIGA RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Article AV - Russian IS - 0006-3029 UR - ISI:000185990800006 L2 - nucleic acids;molecular mechanics;method of density functional theory;hydrogen bonds;Watson-Crick pair;base stacking;NUCLEIC-ACID BASES; POTENTIAL FUNCTIONS; SIMULATION; ENERGY; APPROXIMATION; DYNAMICS; PAIRS SO - Biofizika 2003 ;48(5):821-829 9164 UI - 6797 AU - Poo JL AU - Garcia X AU - Martins EB AU - Kershenobich D AD - Cif Biotec, Mexico City, DF, MexicoHosp Lopez Mateos, ISSSTE, Mexico City, DF, MexicoSciClone Pharmaceut, San Mateo, CA, USAINCMN Salvador Zubiran, Mexico City, DF, Mexico TI - A pilot trial of thymalfasin (thymosin alpha-1) in combination with peginterferon alpha-2a (PEG-IFN2a) and ribavirin in HCV non-responders: 12-week interim results MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 3 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000185816700339 SO - Hepatology 2003 ;38(4):322A-322A 9165 UI - 6980 AU - Poon A AU - Laprise C AU - Jimnez-Corona A AU - Palacios-Martnez M AU - Sifuentes-Osornio J AU - Ponce-de-Len A AU - Bodadilla M AU - Kato M AU - Lemire M AU - Montpetit A AU - Renaud Y AU - Small PM AU - Garca MLG AU - Hudson TJ AU - Schurr E AD - McGill Univ, Dept Biochem, Montreal, PQ, CanadaUniv Quebec, Chicoutimi, PQ, CanadaInst Nacl Salud Pbl, Cuernavaca, Morelos, MexicoInst Nacl Ciencias Mdicas & Nutr Salvador Zubirn, Mexico City, DF, MexicoMcGill Univ, Montreal, PQ, CanadaGenome Quebec Innovat Ctr, Montreal, PQ, CanadaStanford Univ, Stanford, CA 94305, USAMcGill Ctr Study Host Resistance, Montreal, PQ, Canada TI - Comparative genetic study of tuberculosis and asthma susceptibilities MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 0002-9297 UR - ISI:000185599701259 SO - American Journal of Human Genetics 2003 ;73(5):385-385 9166 UI - 6435 AU - Porras MG AU - De Loof A AU - Breuer M AU - Arechiga H AD - Natl Autonomous Univ Mexico, Fac Med, Div Estudios Posgrad & Invest, Mexico City 04510, DF, MexicoKatholieke Univ Leuven, Inst Zool, Louvain, BelgiumPorras, MG, Natl Autonomous Univ Mexico, Fac Med, Div Estudios Posgrad & Invest, Unidad Posgrado 1er Piso, Mexico City 04510, DF, Mexico TI - Corazonin promotes tegumentary pigment migration in the crayfish Procambarus clarkii AB - The undecapeptide corazonin (pGlu-Thr-Phe-Gln-Tyr-Ser-His-Gly-Trp-Thr-AsnNH(2)) elicits a retraction of erythrophore pigment granules and dispersion of leucophore pigment granules in the crayfish Procambarus clarkii. The effects are dose-dependent from 10(-10) to 10(-5) M. Influence on erythrophores is lower than that of Red Pigment Concentrating Hormone (RPCH), which is inactive on leucophores. Corazonin effects are partly blocked by an anti-corazonin antibody, and even less by an anti-RPCH antibody. Corazonin effects are completely suppressed by the calcium chelator BAPTA. Immunoreactive somata and fibers were identified in various regions of the eyestalk (medulla terminalis, medulla interna and medulla externa) with the anti-corazonin antibody. These results suggest the possible existence of a corazonin-like peptide in crustaceans. (C) 2003 Elsevier Inc. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0196-9781 UR - ISI:000188259000015 L2 - adipokinetic hormone;corazonin;crayfish;crustaceans;insects;neuropetides;neurosecretion;pigments;red pigment concentrating hormone;COLOR-INDUCING NEUROHORMONE; CONCENTRATING HORMONE; LOCUSTA-MIGRATORIA; DARK-COLOR; CARDIOACTIVE PEPTIDE; ALBINO STRAIN; BOMBYX-MORI; -CORAZONIN; PHASE; IDENTIFICATION SO - Peptides 2003 ;24(10):1581-1589 9167 UI - 6626 AU - Poznyak AS AU - Shtessel YB AU - Gallegos CJ AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoUniv Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899, USAPoznyak, AS, IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, Mexico TI - Min-max sliding-mode control for multimodel linear time varying systems AB - An original linear time-varying system with unmatched disturbances and uncertainties is replaced by a finite set of dynamic models such that each one describes a particular uncertain case including exact realization,of possible dynamic equations as well as external bounded disturbances. Such a tradeoff between an original uncertain linear time varying dynamic system and a corresponding, higher, order multimodel system with a complete knowledge leads to a linear multi-model system with known bounded disturbances. Each model from a given finite set is characterized by a quadratic performance index. The developed min-max sliding-mode, control strategy gives an optimal robust sliding-surface design algorithm, which is reduced to a solution of an equivalent linear quadratic problem that corresponds to the weighted performance indices with weights from a finite dimensional simplex. An illustrative numerical example is presented MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 8 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000187577300006 L2 - min-max;optimality;sliding-mode control;ROBUST MAXIMUM PRINCIPLE SO - Ieee Transactions on Automatic Control 2003 ;48(12):2141-2150 9168 UI - 8245 AU - Prager MH AU - Porch CE AU - Shertzer KW AU - Caddy JF AD - NOAA, Ctr Coastal Fisheries & Habitat Res, Populat Dynam Team, Beaufort, NC 28516, USANOAA, Natl Marine Fisheries Serv, SE Fisheries Sci Ctr, Miami, FL 33149, USAUniv London Imperial Coll Sci Technol & Med, Dept Environm Sci & Technol, London SW7 2BP, EnglandCtr Invest & Estudios Avanzados, Inst Politecn Nacl, Dept Recursos Mar, Merida, MexicoPrager, MH, NOAA, Ctr Coastal Fisheries & Habitat Res, Populat Dynam Team, 101 Pivers Isl Rd, Beaufort, NC 28516 USA TI - Targets and limits for management of fisheries: A simple probability-based approach AB - Precautionary fishery management requires that a distinction be made between target and limit reference points. We present a simple probability framework for deriving a target reference point for the fishing mortality rate (F) or biomass (B) from the corresponding limit reference point. Our framework is a generalization of one devised previously by Caddy and McGarvey (1996). Both methods require an a priori management decision on the allowable probability of exceeding the limit reference point; our method removes a major assumption by accounting for the uncertainty in the limit reference point. We present the theory underlying the method, an algorithm for solution, and examples of its application. The new procedure, like the old, requires an estimate of the implementation uncertainty expected in the following year's management, an estimate that might be obtained by a review of the effectiveness of past management actions. Either method can be implemented easily on a modern desktop computer. Our generalized framework is more complete, and we believe that it has wide applicability in the use of fishery reference points or, for that matter, in other conservation applications that strive for resource sustainability MH - United Kingdom MH - Mexico|Yucatan MH - USA PB - BETHESDA: AMER FISHERIES SOC RP - NOT IN FILE U3 - TC 12 U4 - Fisheries U5 - J;Article AV - English IS - 0275-5947 UR - ISI:000183338900001 SO - North American Journal of Fisheries Management 2003 ;23(2):349-361 9169 UI - 8856 AU - Prakash M AU - Lattimer JM AU - Steiner AW AU - Page D AD - SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAUNAM, Inst Astron, Mexico City 04510, DF, MexicoPrakash, M, SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA TI - Observability of neutron stars with quarks MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000181737500135 L2 - RX J185635-3754; PARALLAX; 3C-58 SO - Nuclear Physics A 2003 ;715():835C-838C 9170 UI - 8952 AU - Price DB AU - Hernandez D AU - Magyar P AU - Fiterman J AU - Beeh KM AU - James IG AU - Konstantopoulos S AU - Rojas R AU - van Noord JA AU - Pons M AU - Gilles L AU - Leff JA AD - Univ Aberdeen, Foresterhill Hlth Ctr, Dept Gen Practice & Primary Care, Aberdeen AB25 2AY, ScotlandHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoSemmelweis Univ Med, Dept Pulmonol, H-1085 Budapest, HungaryPucrs Med Sch, Porto Alegre, RS, BrazilUniv Hosp Mainz, Div Pulm, Mainz, GermanySpring House Surg, Bolton, Lancs, EnglandUniv Hosp Ioannina, Sch Med, Pneumonol Clin, Ioannina, GreeceUniv Nacl Tucuman, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaAtrium Med Ctr, Dept Pulmonol, Heerlen, NetherlandsOsped Civ, Lugano, SwitzerlandMerck & Co Inc, Whitehouse Stn, NJ, USAPrice, DB, Univ Aberdeen, Foresterhill Hlth Ctr, Dept Gen Practice & Primary Care, Westburn Rd, Aberdeen AB25 2AY, Scotland TI - Randomised controlled trial of montelukast plus inhaled budesonide versus double dose inhaled budesonide in adult patients with asthma AB - Background: Inhaled corticosteroids (ICS) affect many inflammatory pathways in asthma but have little impact on cysteinyl leukotrienes. This may partly explain persistent airway inflammation during chronic ICS treatment and failure to achieve adequate asthma control in some patients. This double blind, randomised, parallel group, non-inferiority, multicentre 16 week study compared the clinical benefits of adding montelukast to budesonide with doubling the budesonide dose in adults with asthma. Methods: After a 1 month single blind run in period, patients inadequately controlled on inhaled budesonide (800 mug/day) were randomised to receive montelukast 10 mg + inhaled budesonide 800 mug/day (n=448) or budesonicle 1600 mug/day (n=441) for 12 weeks. Results: Both groups showed progressive improvement in several measures of asthma control compared with baseline. Mean morning peak expiratory flow (AM PEF) improved similarly in the last 10 weeks of treatment compared with baseline in both the montelukast + budesonide group and in the double dose budesonide group (33.5 v 30.1 l/min). During days 1-3 after start of treatment, the change in AM PEF from baseline was significantly greater in the montelukast + budesonide group than in the double dose budesonicle group (20.1 v 9.6 l/min, p<0.001), indicating faster onset of action in the montelukast group. Both groups showed similar improvements with respect to "as needed" 0 agonist use, mean daytime symptom score, nocturnal awakenings, exacerbations, asthma free days, peripheral eosinophil counts, and asthma specific quality of life. Both montelukast + buclesonide and double dose budesonide were generally well tolerated. Conclusion: The addition of montelukast to inhaled budesonide is an effective and well tolerated alternative to doubling the dose of inhaled budesonicle in adult asthma patients experiencing symptoms and inadequate control on budesonide alone MH - Argentina MH - Brazil MH - United Kingdom MH - Germany MH - Greece MH - Hungary MH - Mexico|Jalisco MH - Netherlands MH - Switzerland MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 46 U4 - Respiratory System U5 - J;Article AV - English IS - 0040-6376 UR - ISI:000181470900007 L2 - LEUKOTRIENE RECEPTOR ANTAGONIST; DOUBLE-BLIND TRIAL; QUALITY-OF-LIFE; CLINICAL-TRIALS; FLUTICASONE PROPIONATE; CORTICOSTEROIDS; BECLOMETHASONE; INFLAMMATION; SALMETEROL; CHILDREN SO - Thorax 2003 ;58(3):211-216 9171 UI - 7004 AU - Prieto R AU - McNoldy BD AU - Fulton SR AU - Schubert WH AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoColorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523, USAClarkson Univ, Dept Math & Comp Sci, Potsdam, NY, USAPrieto, R, Inst Mexicano Tecnol Agua, Paseo Cuauhnahuac 8532, Jiutepec 62550, Mor, Mexico TI - A classification of binary tropical cyclone-like vortex interactions AB - The interaction between two tropical cyclones with different core vorticities and different sizes is studied with the aid of a nondivergent barotropic model, on both the f plane and the sphere. A classification of a wide range of cases is presented, using the Dritschel-Waugh scheme, which subdivides vortex interactions into five types: elastic interaction, partial straining out, complete straining out, partial merger, and complete merger. The type of interaction for a vortex pair on the f plane, and the same pair on the sphere, was the same for 77 out of 80 cases studied. The primary difference between the results on the f plane and those on the sphere is that the vorticity centroid of the pair is fixed on the f plane but can drift a considerable distance poleward and westward on the sphere. In the spherical case, the interaction between the cyclone pair and the associated beta-induced cyclonic and anticyclonic circulations can play an important role. The "partial merger" regime is studied in detail. In this regime the interaction between vortices can lead to episodic exchanges of vorticity, with both vortices surviving and entering a stage of continued but weaker interaction. With the aid of passive tracers, it is found that the exchange of vorticity is restricted to the vortex periphery even when the vorticity field within each vortex is flat, so that the vortex core is the last region to be eroded. It is hypothesized that some observed interacting tropical cyclones actually do undergo this partial-merger process MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0027-0644 UR - ISI:000186427700009 L2 - SCALE VORTICES; DYNAMICS; MERGER; MODEL; FLOW SO - Monthly Weather Review 2003 ;131(11):2656-2U24 9172 UI - 8572 AU - Proenza JA AU - Alfonso P AU - Melgarejo JC AU - Gervilla F AU - Tritlla J AU - Fallick AE AD - Univ Barcelona, Dept Cristal Iog Mineral & Diposits Minerals, CMDM, E-08028 Barcelona, SpainFac Ciencias, Inst Andaluz Ciencas Tierra, Granada 18002, SpainUNAM, Ctr Geociencias, Queretaro 76230, MexicoSUERC, Isotope Geosci Unit, Glasgow, Lanark, ScotlandProenza, JA, Univ Barcelona, Dept Cristal Iog Mineral & Diposits Minerals, CMDM, C-Marti I Franques S-N, E-08028 Barcelona, Spain TI - D, O and C isotopes in podiform chromitites as fluid tracers for hydrothermal alteration processes of the Mayari-Baracoa Ophiolitic Belt, eastern Cuba AB - The Mayari-Baracoa Ophiolitic Belt (MBOB, eastern Cuba) is composed of two large, chromite-rich massifs: Mayari-Cristal and Moa-Baracoa. The chromitites and hosting dunites were firstly affected by a regional serpentinization event, a subsequent episode of hydrothermal alteration (chloritization mainly) and, finally, these already altered bodies were crosscut by thin calcite-dominated veins. Analysed serpentines from serpentinized chromitites and dunites present very similar isotopic compositions (delta(18)O= + 4.7 parts per thousand to + 6.3 parts per thousand and deltaD = - 67 parts per thousand to - 60 parts per thousand), suggesting that the serpentinization process took place at moderate temperatures, in an oceanic environment. Serpentine formation by interaction with ocean water is also supported by the isotopic composition of chlorite and calcite. These results suggest that the serpentinization, chloritization and fracture filling processes of the Mayari-Baracoa Ophiolite Belt took place in a subocean floor scenario and, thus, that the Mayari-Baracoa serpentines represent a good example of serpentine formed during interaction with seawater. The oceanic origin of the serpentines from serpentinized chromitites and dunites from the MBOB indicate that the serpentinization of the mantle sequence occurred pre-thrusting (pre-emplacement in age). (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Queretaro MH - United Kingdom MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800022 L2 - fluids;serpentinization;stable isotopes;ophiolites;Cuba;ULTRAMAFIC ROCKS; OXYGEN; SERPENTINIZATION; HYDROGEN; WATERS SO - Journal of Geochemical Exploration 2003 ;78-9():117-122 9173 UI - 7000 AU - Prokes K AU - Munoz-Sandoval E AU - Chinchure AD AU - Mydosh JA AD - Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, GermanyIPICyT, Adv Mat Dept, San Luis Potosi 78231, MexicoLeiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, NetherlandsMax Planck Inst Chem Phys Solids, D-01187 Dresden, GermanyProkes, K, Hahn Meitner Inst Berlin GmbH, Glienicker Str 100,SF-2, D-14109 Berlin, Germany TI - Magnetic structure and transitions of Dy2Ni2Pb AB - We have studied the magnetic structure and magnetic properties of the orthorhombic compound Dy2Ni2Pb by means of neutron-diffraction and bulk measurements. The bulk measurements (susceptibility, resistivity, and specific heat) suggest two distinct magnetic phase transitions: one antiferromagnetic at T-N=14.5 K and the other at T-m=3.5 K, below which a ferrimagnetic or canted ferromagnetic structure is anticipated. On the contrary, neutron-diffraction measurements, which were made in the range 1.5-20 K, showed that Dy2Ni2Pb has a complicated noncollinear antiferromagnetic spin structure in the whole temperature range studied. The magnetic structure is described by two commensurate propagation vectors q(1)=(0,0,0) and q(2)=(1/3,0,0) with Dy moments confined to the a-c plane. A smooth development of q(1) and q(2) magnetic-moment components at low temperatures indicates that the magnetic structure remains antiferromagnetic. We attempt to reconcile both bulk and neutron results. The possibility of another order-order magnetic phase transition at lower temperature is suggested MH - Germany MH - Mexico|San Luis Potosi MH - Netherlands PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000186422400081 L2 - NEUTRON-DIFFRACTION SO - Physical Review B 2003 ;68(13): 9174 UI - 7267 AU - Prosen T AU - Seligman TH AU - Znidaric M AD - Univ Ljubljana, FMF, Dept Phys, Ljubljana, SloveniaUniv Nacl Autonoma Mexico, Ctr Cientcias Fis, Cuernavaca 62191, Morelos, MexicoProsen, T, Univ Ljubljana, FMF, Dept Phys, Ljubljana, Slovenia TI - Theory of quantum Loschmidt echoes AB - In this paper we review our recent work on the theoretical approach to quantum Loschmidt echoes, i.e., various properties of the so-called echo dynamics - the composition of forward and backward time evolutions generated by two slightly different Hamiltonians, such as the state autocorrelation function (fidelity) and the purity of a reduced density matrix traced over a subsystem (purity fidelity). Our main theoretical result is a linear response formalism, expressing the fidelity and purity fidelity in terms of integrated time autocorrelation function of the generator of the perturbation. Surprisingly, this relation predicts that the decay of fidelity is the slower the faster the decay of correlations. In particular for a static (time-independent) perturbation, and for non-ergodic and non-mixing dynamics where asymptotic decay of correlations is absent, a qualitatively different and faster decay of fidelity is predicted on a time scale proportional to 1/delta as opposed to mixing dynamics where the fidelity is found to decay exponentially on a timescale proportional to 1/delta(2), where is a strength of perturbation. A detailed discussion of a semi-classical regime of small effective values of Planck constant h is given where classical correlation functions can be used to predict quantum fidelity decay. Note that the correct and intuitively expected classical stability behavior is recovered in the classical limit h --> 0, as the two limits 6 --> 0 and h --> 0 do not commute. The theoretical results are demonstrated numerically for two models, the quantized kicked top and the multi-level Jaynes Cummings model. Our method can for example be applied to the stability analysis of quantum computation and quantum information processing MH - Mexico|Morelos MH - Slovenia PB - KYOTO: PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE RP - NOT IN FILE U3 - TC 30 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9687 UR - ISI:000185853500019 L2 - KICKED TOP; MATRIX-ELEMENTS; CHAOTIC SYSTEMS; STABILITY; DECOHERENCE; MOTION; IRREVERSIBILITY; INTEGRABILITY; COMPUTATION; DECAY SO - Progress of Theoretical Physics Supplement 2003 ;(150):200-228 9175 UI - 8017 AU - Prosen T AU - Seligman TH AU - Znidaric M AD - Univ Ljubljana, Dept Phys, FMF, Ljubljana 61000, SloveniaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoProsen, T, Univ Ljubljana, Dept Phys, FMF, Ljubljana 61000, Slovenia TI - Estimation of purity in terms of correlation functions AB - We prove a rigorous inequality that estimates the purity of a reduced density matrix of a composite quantum system in terms of cross correlation of the same state and an arbitrary product state. Various immediate applications of our result are proposed, in particular, concerning Gaussian wave-packet propagation under classically regular dynamics MH - Mexico|Morelos MH - Slovenia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000183915200023 L2 - QUANTUM; SYSTEMS; DECOHERENCE; ECHOES; DECAY SO - Physical Review A 2003 ;67(6): 9176 UI - 8566 AU - Prosen T AU - Seligman TH AU - Znidaric M AD - Univ Ljubljana, Dept Phys, FMF, Ljubljana 61000, SloveniaUniv Mexico UNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoProsen, T, Univ Ljubljana, Dept Phys, FMF, Ljubljana 61000, Slovenia TI - Evolution of entanglement under echo dynamics AB - Echo dynamics and fidelity are often used to discuss stability in quantum-information processing and quantum chaos. Yet fidelity yields no information about entanglement, the characteristic property of quantum mechanics. We study the evolution of entanglement in echo dynamics. We find qualitatively different behavior between integrable and chaotic systems on one hand and between random and coherent initial states for integrable systems on the other. For the latter the evolution of entanglement is given by a classical time scale. Analytic results are illustrated numerically in a Jaynes-Cummings model MH - Mexico|Morelos MH - Slovenia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000182604300033 L2 - JAYNES-CUMMINGS MODEL; CHAOTIC SYSTEMS; QUANTUM MOTION; DECOHERENCE; STABILITY; DECAY; IRREVERSIBILITY; STATES SO - Physical Review A 2003 ;67(4): 9177 UI - 8075 AU - Prutskij TA AU - az-Arencibia P AU - Mintairov A AU - Merz J AU - Kosel T AD - BUAP, Inst Ciencias, Puebla 72000, MexicoCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Notre Dame, Dept Elect Engn, Notre Dame, IN 46556, USAPrutskij, TA, BUAP, Inst Ciencias, Apdo Postal 207, Puebla 72000, Mexico TI - Some evidences of ordering in InGaP layers grown by liquid phase epitaxy AB - We make a comparative study of the optical and structural characteristics of two InxGa1-xP (x approximate to 0.5) films nearly lattice matched to GaAs, here referred to as sample S1 and sample S2. The films were grown by liquid phase epitaxy (LPE). Photoluminescence (PL) measurements were performed in a wide temperature and exciting power density range for different polarizations (parallel to the [0 1 1] and [0 (1) over bar 1] directions) of the emitted radiation. Observations suggest that the InxGa1-xP layer in one of the samples has the usual characteristics commonly obtained in an LPE grown material, while in the other sample, an anomalous growth took place. Our experimental observations show differences in the layer thickness, the surface morphology, as well as in the structural and optical characteristics such as the 4 K PL energy peak position. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000183967200044 L2 - liquid phase epitaxy;III-V solid solutions;transmission electron microscopy;photoluminescence;PHOTOLUMINESCENCE SO - Applied Surface Science 2003 ;212():230-234 9178 UI - 7798 AU - Pucciarelli HM AU - Sardi ML AU - Lopez JCJ AU - Sanchez CS AD - Natl Univ La Plata, Fac Ciencias Nat & Museo, Museo La Plata, Div Antropol, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, ArgentinaINAH, Mexico City, DF, MexicoInst Invest Antropol, Mexico City, DF, MexicoPucciarelli, HM, Natl Univ La Plata, Fac Ciencias Nat & Museo, Museo La Plata, Div Antropol, Paseo Bosque S-N, RA-1900 La Plata, Argentina TI - Early peopling and evolutionary diversification in America AB - Several cranial-functional studies were made to compare the major (neurocranium and face) and minor (anteroneural, midneural, posteroneural, otic, optic, respiratory, masticatory, and alveolar) cranial components in different human populations. In the present study, samples from Paleoamericans and ancient and modern Amerindians from Valley of Mexico, Lagoa Santa, Tierra del Fuego Island, and Minas Gerais (Botocudos) were compared. The aim was to test the hypotheses that (1) "There are non-significant differences in the functional cranial components of different Paleoamerican crania, since they proceeded from a single dispersive effect" and that (2) "The biological variability of Paleoamerican and Amerindian functional cranial components was produced by random diversification evoked-after migration-by stochastic evolution". Its acceptance will hold the criterion of temporal discontinuity between "megapopulations", with a high incidence of migration and genetic drift. Its rejection will mean that Paleoamericans were not a morphologically homogeneous substratum, and that further populations could have-at least in part-originated from one or several central nuclei highly diversified by non-stochastic processes, like selection and adaptation. Multivariate (discriminant analysis and hierarchical clusters) were employed to get a general sample distribution. Univariate between-group standardized sD(2) distances were calculated to measure absolute and relative within-component differences. Statistical analyses were performed by the SYSTAT 9 program. Results lead us to reject both null hypotheses, suggesting that: (1) some cranial-functional differences were evident between both Paleoamerican samples, and (2) that several adaptative trends from Paleoamericans to modern Amerindians, and between Amerindians, might have occurred. It was concluded that adaptation could explain a fraction of the non-detectable cranial variation by the non-functional cranionietric methods not explained by the, 'migration-drift" model for the American diversification. (C) 2002 Elsevier Ltd and INQUA. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1040-6182 UR - ISI:000184505700012 L2 - NEW-WORLD; MORPHOLOGICAL AFFINITIES; CRANIAL MORPHOLOGY; 1ST AMERICANS; HUMAN REMAINS; SKULL; COMPONENTS; POPULATION; MIGRATION; GROWTH SO - Quaternary International 2003 ;109():123-132 9179 UI - 6677 AU - Pulinets SA AU - Legen'ka AD AU - Gaivoronskaya TV AU - Depuev VK AD - Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Delegac Coyoacan, Mexico City 04510, DF, MexicoIZMIRAN, Inst Terr Magnet, Troitsk 142190, Moscow Reg, RussiaPulinets, SA, Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Delegac Coyoacan, Mexico City 04510, DF, Mexico TI - Main phenomenological features of ionospheric precursors of strong earthquakes AB - (T)his paper summarizes the results of more than 10 years spent by the authors studying the variations in the ionosphere over seismically active regions several days or hours before strong earthquakes. The physical mechanisms of such variations established by the authors and published previously are submitted in the references. This article is aimed mainly at determining the major characteristic parameters of the observed effects (temporal and spatial variations, range in amplitude, etc.) to provide the means to separate the seismogenic effects from other forms of ionospheric variability. Data obtained by ground-based ionosondes and by topside vertical sounding from satellites are used in conjunction with local probe measurements. The topside vertical profiles of the electron concentration are analyzed. It is shown that the most characteristic effect is that of scale height changes in the vertical distribution of ions and electrons implying a decrease in the mean ion mass within the F-layer due to seismogenic effects. This result is supported by direct mass-spectrometer measurements. Differences between magnetic storrn ionospheric disturbances and seismogenic variations within the ionosphere are also discussed. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Geochemistry & Geophysics;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1364-6826 UR - ISI:000187350000001 L2 - ELECTRON-DENSITY; SEISMIC ACTIVITY SO - Journal of Atmospheric and Solar-Terrestrial Physics 2003 ;65(16-18):1337-1347 9180 UI - 7582 AU - Qiu QS AU - Barkla BJ AU - Vera-Estrella R AU - Zhu JK AU - Schumaker KS AD - Univ Arizona, Dept Plant Sci, Tucson, AZ 85721, USAUNAM, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoSchumaker, KS, Univ Arizona, Dept Plant Sci, Tucson, AZ 85721, USA TI - Na+/H+ exchange activity in the plasma membrane of Arabidopsis AB - In plants, Na+/H+ exchangers in the plasma membrane are critical for growth in high levels of salt, removing toxic Na+ from the cytoplasm by transport out of the cell. The molecular identity of a plasma membrane Na+/H+ exchanger in Arabidopsis (SOS1) has recently been determined. In this study, immunological analysis provided evidence that SOS1 localizes to the plasma membrane of leaves and roots. To characterize the transport activity of this protein, purified plasma membrane vesicles were isolated from leaves of Arabidopsis. Na+/H+ exchange activity, monitored as the ability of Na to dissipate an established pH gradient, was absent in plants grown without salt. However, exchange activity was induced when plants were grown in 250 mm NaCl and increased with prolonged salt exposure up to 8 d. H+-coupled exchange was specific for Na, because chloride salts of other monovalent cations did not dissipate the pH gradient. Na+/H+ exchange activity was dependent on Na (substrate) concentration, and kinetic analysis indicated that the affinity (apparent K-m) of the transporter for Na+ is 22.8 mm. Data from two experimental approaches supports electroneutral exchange (one Na+ exchanged for one proton): (a) no change in membrane potential was measured during the exchange reaction, and (b) Na+/H+ exchange was unaffected by the presence or absence of a membrane potential. Results from this research provide a framework for future studies into the regulation of the plant plasma membrane Na+/H+ exchanger and its relative contribution to the maintenance of cellular Na+ homeostasis during plant growth in salt MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 26 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000185076600065 L2 - PLANT SALT TOLERANCE; VACUOLAR H+-ATPASE; PROTON-TRANSLOCATING ATPASE; TONOPLAST VESICLES; SODIUM-TRANSPORT; BETA-VULGARIS; MESEMBRYANTHEMUM-CRYSTALLINUM; POTASSIUM NUTRITION; GENETIC-ANALYSIS; STORAGE TISSUE SO - Plant Physiology 2003 ;132(2):1041-1052 9181 UI - 7698 AU - Querolle O AU - Dubois J AU - Thoret S AU - Roussi F AU - Montiel-Smith S AU - Gueritte F AU - Guenard D AD - CNRS, Inst Chim Subst Nat, F-91198 Gif Sur Yvette, FranceUniv Autonoma Puebla, Fac Ciencias Quim Benemerita, Puebla 72570, MexicoDubois, J, CNRS, Inst Chim Subst Nat, Ave Terrasse, F-91198 Gif Sur Yvette, France TI - Synthesis of novel macrocyclic docetaxel analogues. Influence of their macrocyclic ring size on tubulin activity AB - This work describes the synthesis of a series of novel macrocyclic taxoids 3 and 3(H) designed to mimic the docetaxel solid-state ("nonpolar") conformation. These compounds, bearing 18-, 20-, 21-, and 22-membered rings connecting the C-2 OH and C-3' NH moieties, were constructed by ring-closing olefin metathesis of the taxoid-omega, omega'-dienes 4. Biological evaluation of these new taxoids showed that activity is dependent on the ring size, and only the 22-membered ring taxoid 3d exhibits significant tubulin binding. Synthesis of the open-chain analogues 7 and 7(H) and comparison of their biological activities with macrocyclic taxoids show that the carbon tether between C-2 OH and C-3' NH does not hamper tubulin binding. Computational studies of the conformational behavior of the macrocyclic taxoids 3 indicate that the 18-, 20-, and 21-membered-ring 3a-c adopt mainly conformations that are not recognized by tubulin. The most active taxoid 3d appears to adopt a conformation that is between the "nonpolar" and T-shaped forms MH - France MH - Mexico|Puebla PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Medicinal U5 - J;Article AV - English IS - 0022-2623 UR - ISI:000184719100009 L2 - BIOLOGICAL EVALUATION; HYDROPHOBIC COLLAPSE; TAXOL ANALOGS; BETA-TUBULIN; SIDE-CHAIN; CONFORMATIONS; NMR; MICROTUBULES; DERIVATIVES; METATHESIS SO - Journal of Medicinal Chemistry 2003 ;46(17):3623-3630 9182 UI - 8881 AU - Quesada-Perez M AU - Gonzalez-Tovar E AU - Martin-Molina A AU - Lozada-Cassou M AU - Hidalgo-Alvarez R AD - Univ Granada, Fac Ciencias, Dept Fis Aplicada, Grp Fis Fluidos & Biocoloides, E-18071 Granada, SpainUniv Jaen, Escuela Univ Politecn Linares, Dept Fis, Jaen 23700, SpainUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoQuesada-Perez, M, Univ Granada, Fac Ciencias, Dept Fis Aplicada, Grp Fis Fluidos & Biocoloides, E-18071 Granada, Spain TI - Overcharging in colloids: Beyond the Poisson-Boltzmann approach AB - A broad range of manufactured products and biological fluids are colloids. The ability to understand and control the processes (of scientific, technological and industrial interest) in which such colloids are involved relies upon a precise knowledge of the electrical double layer. The traditional approach to describing this ion cloud around colloidal particles has been the Gouy - Chapman model, developed on the basis of the Poisson - Boltzmann equation. Since the early 1980s, however, more sophisticated theoretical treatments have revealed both quantitative and qualitative deficiencies in the Poisson-Boltzmann theory, particularly at high ionic strengths and /or high surface charge densities. This review deals with these novel approaches, which are mostly computer simulations and approximate integral equation theories based on the so-called primitive model. Special attention is paid to phenomena that cannot be accounted for by the classic theory as a result of neglecting ion size correlations, such as overcharging, namely, the counterion concentration in the immediate neighborhood of the surface is so large that the particle surface is overcompensated. Other illustrative examples are the nonmonotonic behavior of the electrostatic potential and attractive interactions between equally charged surfaces. These predictions are certainly remarkable and, on paper, they can have an effect on experimentally measurable quantities (for instance, electrophoretic mobility). Even so, these new approaches have scarcely been applied in practice. Thus a critical survey on the relevance of ion size correlation in real systems is also included. Overcharging of macroions can also be brought about by absorption of oppositely charged polyelectrolytes. Noteworthy examples and theoretical approaches for them are also briefly reviewed MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Review AV - English IS - 1439-4235 UR - ISI:000181790700001 L2 - colloids;electric double layer;electrophoresis;overcharging;polyelectrolytes;ELECTRICAL DOUBLE-LAYER; HYPERNETTED-CHAIN APPROXIMATION; DENSITY-FUNCTIONAL THEORY; ION-ION CORRELATIONS; POLYELECTROLYTE-MACROION COMPLEXATION; INTEGRAL-EQUATION CALCULATIONS; INHOMOGENEOUS COULOMB FLUIDS; EFFECTIVE SURFACE-CHARGE; MONTE-CARLO SIMULATIONS; PRIMITIVE MODEL SO - Chemphyschem 2003 ;4(3):235-248 9183 UI - 8322 AU - Quesada M AU - Stoner KE AU - Rosas-Guerrero V AU - Palacios-Guevara C AU - Lobo JA AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaQuesada, M, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Effects of habitat disruption on the activity of nectarivorous bats (Chiroptera : Phyllostomidae) in a dry tropical forest: implications for the reproductive success of the neotropical tree Ceiba grandiflora AB - In the tropical dry forest of the central Pacific coast of Mexico the pollination and reproductive success of the bombacaceous tree Ceiba grandiflora was negatively affected by habitat disruption. Two of the three bat species that function as effective pollinators for this species (Glossophaga soricina and Musonycteris harrisoni) visited flowers found in trees in disturbed habitats significantly less than trees found in undisturbed habitats. A similar pattern was observed for the effective bat pollinator, Leptonycteris curasoae; however the difference was not significant. The three nectarivorous bats that functioned as effective pollinators of C. grandiflora also visited flowers to exclusively feed on pollen by biting or pulling off an anther (see Fig. S1 of Electronic Supplementary Material). The number of pollen grains deposited on stigmas from flowers in undisturbed areas was significantly greater than from flowers in disturbed habitats. The greater visitation rate and the greater number of pollen grains deposited on flowers from trees in undisturbed forest resulted in a significantly greater fruit set for trees in these areas. Our study demonstrates the negative effect that habitat disruption has on bat pollinators in tropical dry forest ecosystems and documents the negative consequences for the plants they pollinate MH - Costa Rica MH - Mexico|Michoacan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 18 U4 - Ecology U5 - J;Article AV - English IS - 0029-8549 UR - ISI:000183198000011 L2 - habitat fragmentation;pollination decline;phyllostomid bats;plant reproductive success;plant-animal interactions;POPULATION GENETIC CONSEQUENCES; SEED SET; POLLINATION BIOLOGY; PLANT CONSERVATION; FRENCH-GUIANA; RAIN-FORESTS; FRUIT-SET; FRAGMENTATION; POLLEN; ECOLOGY SO - Oecologia 2003 ;135(3):400-406 9184 UI - 8596 AU - Quezada-Euan JJG AU - Perez-Castro EE AU - May-Itza WD AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Apicultura, Yucatan 97100, MexicoUniv Nacl Ctr Peru, Fac Zootecnia, Huancayo, PeruQuezada-Euan, JJG, Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Dept Apicultura, Apdo Postal 4-116 Merida, Yucatan 97100, Mexico TI - Hybridization between European and African-derived honeybee populations (Apis mellifera) at different altitudes in Peru AB - The current status of admixture between Apis mellifera of African and European origin was studied in populations from different altitudinal regions of Peru. Worker bees from 7 altitudinal regions were analysed by morphometrics and mtDNA RFLPs. Our results showed that the rates of admixture between African-derived and resident European populations have depended on the altitude of the region. Our finding of hybrid colonies at elevations above 2 500 m supports the hypothesis that climate alone may not restrain the northern limit of the distribution of African-derived honeybees in the Americas. We conclude that introgressive hybridization between African and European derived honeybees best explains the current patterns of distribution of morphotypes and mitotypes across the different regions of Peru MH - Mexico|Yucatan MH - Peru PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000182653000003 L2 - Africanization;hybridization;Apis mellifera;mtDNA;morphometrics;Peru;MITOCHONDRIAL-DNA; TROPICAL YUCATAN; BEE POPULATIONS; IDENTIFICATION; POLYMERASE; ARGENTINA; HYMENOPTERA; COLONIES; ORIGIN; APIDAE SO - Apidologie 2003 ;34(3):217-225 9185 UI - 9364 AU - Quiclet-Sire B AU - Quintero L AU - Sanchez-Jimenez G AU - Zard SZ AD - Ecole Polytech, CNRS, Synth Organ Lab, F-91128 Palaiseau, FranceUniv Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, MexicoZard, SZ, Ecole Polytech, CNRS, Synth Organ Lab, F-91128 Palaiseau, France TI - A practical variation on the Paal-Knorr pyrrole synthesis AB - The radical addition of alpha-xanthyl ketones to vinyl pivalate gives adducts that are synthetic equivalents of 1,4-ketoaldehydes; treatment with ammonia or primary amines leads to the corresponding pyrroles in high yield MH - France MH - Mexico|Puebla PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0936-5214 UR - ISI:000180461200016 L2 - pyrroles;furans;Paal-Knorr reaction;radical additions;xanthates;ALKYLPYRROLES; NITROALKANES SO - Synlett 2003 ;(1):75-78 9186 UI - 8289 AU - quino-Olivos MA AU - Andersen SI AU - Lira-Galeana C AD - Inst Mexicano Petr, Thermodynam Res Lab, Mexico City 07730, DF, MexicoTech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, DenmarkLira-Galeana, C, Inst Mexicano Petr, Thermodynam Res Lab, Eje Cent Lazaro Gardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Comparisons between asphaltenes from the dead and live-oil samples of the same crude oils AB - Asphaltenes precipitated from pressure-preserve bottomhole oil samples have been obtained for three oils at different pressures, using a bulk high-pressure filtration apparatus. The precipitates captured on the filter were recovered, the asphaltenes defined by the n-heptane insolubility were extracted and analyzed. These pressure-driven asphaltenes found on the filter were found to make up in the range between 50 and 100 ppm of the whole crude oil. Opening of the cell did not reveal asphaltenes retained due to wall adhesion. Size exclusion chromatography tests performed on both the live-oil-derived asphaltenes and the standard asphaltenes as precipitated by atmospheric titration on the same crude oil, revealed that the live-oil asphaltenes had apparent smaller hydrodynamic volume and narrower distributions than the standard asphaltenes for two oils. Further FTIR tests also showed large differences between standard asphaltenes and the asphaltenes obtained at high pressure filter. The latter appeared to contain more functional groups and be less saturated. Implication of these structural differences on precipitation modeling is discussed MH - Denmark MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Energy & Fuels;Engineering, Chemical;Engineering, Petroleum U5 - J;Article AV - English IS - 1091-6466 UR - ISI:000183309800020 SO - Petroleum Science and Technology 2003 ;21(5-6):1017-1041 9187 UI - 7599 AU - Quinones H AU - Ruelle P AU - Nemeth I AD - CEMAGREF, Gr Montpellier, Res Unit Irrigat, French Inst Agr & Environm Engn Res, F-34033 Montpellier 1, FranceInst Mexicano Tecnol Agua, Irrigat Unit, Progreso, Jiutepec, MexicoRuelle, P, CEMAGREF, Gr Montpellier, Res Unit Irrigat, French Inst Agr & Environm Engn Res, 361 Rue JF Breton,BP 5095, F-34033 Montpellier 1, France TI - Comparison of three calibration procedures for TDR soil moisture sensors AB - The application of time domain reflectometry (TDR) principles to determine soil water content has been widely accepted as an alternative method since Topp et al. (1980) proposed. an empirical relationship between the dielectric constant of soil and soil moisture content. However, a wide range of studies have made it clear that the proposed function has only restricted validity. Although the response of the TDR signal shows a steady correlation with soil moisture, it is also affected by others factors related to the physical and chemical nature of soil and the solute characteristics of soil solution. It is therefore necessary to determine a particular calibration for each situation. Three methods are used to calibrate a TDR sensor. First, two well-known methods are compared: noncontinuous wetting on one hand, and continuous wetting by dripping of a soil sample on the other. The third consists of the progressive introduction of a sensor in a soil sample with a known moisture content. The three methods all lead to similar consistent relationships. The methods are validated using field data taking into account spatial variation of measurement at a given date and water inputs and uptakes under an irrigated corn crop during a growing season. Copyright (C) 2003 John Wiley Sons, Ltd MH - France MH - Mexico|Morelos PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Water Resources U5 - J;Article AV - English IS - 1531-0353 UR - ISI:000185036700002 L2 - TDR;calibration procedure;soil moisture;TIME-DOMAIN REFLECTOMETRY; WATER-CONTENT MEASUREMENT; ELECTRICAL-CONDUCTIVITY; SENSITIVITY; TEXTURE; MODELS; SANDY; LINES SO - Irrigation and Drainage 2003 ;52(3):203-217 9188 UI - 8877 AU - Quintana-Ascencio PF AU - Menges ES AU - Weekley CW AD - Archbold Biol Stn, Lake Placid, FL 33862, USAColegio Frontera Sur, Div Conservac Biodivers, San Cristobal De Casas, Chiapas, MexicoQuintana-Ascencio, PF, Archbold Biol Stn, POB 2057, Lake Placid, FL 33862 USA TI - A fire-explicit population viability analysis of Hypericum cumulicola in Florida rosemary scrub AB - Land managers seeking to reestablish historical fire regimes need guidance on how to apply prescribed fire to promote the population persistence of endangered species. We explored extinction risks of Hypericum cumulicola , a fire-dependent plant endemic to the Lake Wales Ridge, Florida (U.S.A). Stochastic and deterministic matrix population models based on six censuses (1994-1999) and data from several germination and seedling survival experiments were used to compare H. cumulicola demography and extinction probabilities under different fire regimes. Environmental variation associated with site, year, and winter precipitation was included in these models. We estimated time to extinction of unburned populations of different sizes and the probabilities of extinction under no fire, different regular fire-return intervals, and alternating short and long fire-return intervals. Following an initial fire, even relatively large populations of thousands of individuals may become locally extinct within 300-400 years without additional fires. Extinction probability declined as intervals between fires decreased. Fire intervals of >50 years resulted in an appreciable extinction probability after 200 years. Cycles of highly staggered short and long fire-return intervals caused slightly higher chances of extinction than regular fire-return intervals. The simulations were sensitive to estimates of survival in the seed bank. Active management will be required to restore favorable fire regimes in areas where fire has been suppressed. To maintain biodiversity, managers should consider variable fire regimes to match the requirements of a variety of species with different life histories MH - USA MH - Mexico|Chiapas PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 30 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000181736400013 L2 - CANOPY SEED STORAGE; TIME-SINCE-FIRE; CERATIOLA-ERICOIDES; ECOLOGICAL SIGNIFICANCE; PRONE ENVIRONMENTS; PERENNIAL HERB; WOODLAND HERB; ENDEMIC PLANT; WOODY-PLANTS; DEMOGRAPHY SO - Conservation Biology 2003 ;17(2):433-449 9189 UI - 8194 AU - Quintero-Ramos A AU - Bourne MC AU - Barnard J AU - nzaldua-Morales A AU - Gonzalez-Laredo R AU - Pensaben-Esquivel M AU - Marquez-Melendez R AD - Univ Chihuahua, Fac Chem, Chihuahua, MexicoCornell Univ, New York State Agr Expt Stn, Inst Food Sci & Technol, Geneva, NY 14456, USAInst Tecnol Durango, Durango, Dgo, MexicoQuintero-Ramos, A, Univ Autonoma Chihuahua, Fac Chem, Postgrad Studies Dept, POB 1542-C, Chihhuahua, Mexico TI - Kinetics of calcium ion absorption into carrot tissue during immersion in calcium chloride solutions AB - Calcium absorption in sliced carrots was evaluated by immersion in calcium chloride solution (0.3, 0.6 and 0.9 M) at 65C and 100C. Absorption kinetics were obtained for each of the experimental combinations using, linear and quadratic statistical models. The apparent diffusion coefficient was estimated using Fick's second law for infinite slabs. Linear models of calcium absorption versus temperature and concentration were adequate for both 65C and 100C conditions (P less than or equal to 0.05). Diffusion coefficients of calcium ions into carrot tissue showed no significant increase with selected concentrations of calcium chloride. A significant increase (P less than or equal to 0.05) in the average diffusion coefficient (0.918-2.32 x 10(-9) m(2)/s) was observed with a rise in temperature from 65C to 100C MH - Mexico|Chihuahua MH - Mexico|Durango MH - USA PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0145-8892 UR - ISI:000183513800001 L2 - SALT DIFFUSION; ASCORBIC-ACID; DIFFUSIVITIES; LOSSES; POTATO; WATER; MODEL SO - Journal of Food Processing and Preservation 2003 ;27(2):75-85 9190 UI - 6402 AU - Quiroga-Garza HM AU - Picchioni GA AD - INIFAP, Torreon 27000, Coahuila, MexicoNew Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USAQuiroga-Garza, HM, INIFAP, Apartado Postal 247, Torreon 27000, Coahuila, Mexico TI - Photoperiod effects upon shoot growth and color of bermudagrass fertilized with slow-release nitrogen sources AB - Total plant biomass, shoot growth rate, and the periodicity in shoot growth and color of hybrid bermudagrass [Cynodon dactylon (L.) Pers. x C. transvaalensis Burtt-Davy 'Tifgreen') in response to slow-release fertilizer N sources, rates, and application frequencies were studied in two, 120-day greenhouse studies. Plugs were planted in plastic cylinders filled with a growing medium of 93 sand : 7 peat moss (w/w). The first experiment was completed under progressively increasing photoperiod (13.1 to 14.9 hours) typical of the long-day requirements for bermudagrass growth. The second experiment occurred under progressively decreasing photoperiod (13.7 to 10.7 hours) representative of autumnal growing conditions and declining growth and N demand. Urea (URE), sulfur-coated urea (SCU), and hydroform (HYD, methylene urea polymers) were broadcast at N rates of 100 or 200 kg(.)ha(-1) and at frequencies of 20 or 40 days. Bermudagrass was clipped at 3-day intervals and the average daily clipping growth rate (increase in shoot dry matter; DM) reached a maximum of 11.5 g(.)m(-1) per day. Use of the least soluble source, HYD, produced the lowest total clipping DM, and at low HYD rate and frequency, leaf color intensity was frequently below the accepted standard of 7, in the scale from 1 "tan" to 9 "dark green". A greater responsiveness of bermudagrass to N rate and application frequency (increased clipping growth rate and color intensification upon N application) occurred under increasing photoperiodic conditions as compared to decreasing photoperiodic conditions. Both clipping growth and color changed cyclically through time and mainly under long-day photoperiod (>12 hours), with greater oscillation at longer fertilization interval (40 days). With either SCU or URE, at low N rate and frequency (total N application of 0.25 g(.)m(-2) per day), clipping growth rates were above 4 g(.)m(-2) per day, and turf color was at or above the minimum quality standard through most of the growing period. Higher total SCU and URE application rates, previously shown to increase N leaching losses in these experimental conditions, produced significantly more clipping growth and did not appear to intensify color sufficient to warrant the increased risk of N loss MH - Mexico|Coahuila MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Horticulture U5 - J;Article AV - English IS - 0018-5345 UR - ISI:000188292100032 L2 - Cynodon dactylon Pers. x C. transvaalensis;clipping growth;thatch;growth periodicity;KENTUCKY BLUEGRASS; LEACHING LOSSES; NITRATE; TURF SO - Hortscience 2003 ;38(7):1441-1445 9191 UI - 7485 AU - Quiroga JA AU - Servin M AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainCtr Invest Opt AC, Leon 37150, MexicoQuiroga, JA, Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, Ciudad Univ S-N, E-28040 Madrid, Spain TI - Isotropic n-dimensional fringe pattern normalization AB - Fringe pattern normalization consists in the background suppression and modulation normalization of a given fringe pattern, this process gives as a result a pure sinusoidal phase modulated signal. Normalization is an important operation in the demodulation of the phase from a single fringe pattern where spatially varying background and/or modulation act as error sources. The solution proposed is a direct and isotropic operator, based on the application of an n-dimensional quadrature transform. We have applied the method to simulated as well as experimental data with good results. (C) 2003 Published by Elsevier B.V MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000185295000007 L2 - QUADRATURE TRANSFORM; PHASE; DEMODULATION; ALGORITHM; ORIENTATION SO - Optics Communications 2003 ;224(4-6):221-227 9192 UI - 2542 AU - Quiroga LM AU - Arias J AU - Bellemore AC AU - Pacheco R AU - Packer AL AU - Vivas I AU - Voutssas J AU - Allard SL AU - Barreau D AD - Univ Hawaii, Honolulu, HI 96822, USAJaveriana Univ, Informat Sci Program, Bogota, ColombiaUniv Fed Santa Catarina, Project LATTES, BR-88040900 Florianopolis, SC, BrazilWHO, PAHO, BIREME, Latin Amer & Caribbean Ctr Hlth Sci Informat, Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Digital Lib Project, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Adm Comp Serv, Mexico City 04510, DF, MexicoUniv Kentucky, Coll Commun & Informat Studies, Lexington, KY 40506, USAUniv N Carolina, Sch Lib & Informat Sci, Chapel Hill, NC 27599, USAQuiroga, LM, Univ Hawaii, POST Bldg,1680 East West Rd, Honolulu, HI 96822 USA TI - Digital libraries in action: The Latin American and Caribbean experience AB - Knowledge acquisition and dissemination can facilitate innovation and provide the engine for economic growth and development. Creating and sharing knowledge can be hindered when multiple languages are spoken in geographically diverse regions that are bound together by cultural proximity. Digital libraries help provide the information infrastructure and technology to overcome these challenges and facilitate knowledge sharing by encouraging collaboration and providing information access. This interactive panel session features experts who are working on the frontlines building and implementing programs that utilize DLs to meet these goals in Latin America and the Caribbean. These projects address technical issues related to cross-lingual access, interoperability, and usability as well as organizational issues related to sharing and integrating research and development streams MH - USA MH - Brazil MH - Colombia MH - Mexico|Distrito Federal PB - MEDFORD: INFORMATION TODAY INC RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Information Systems;Information Science & Library Science U5 - S;Article AV - English IS - 0044-7870 UR - ISI:000228354100094 SO - Asist 2003: Proceedings of the 66Th Asist Annual Meeting, Vol 40, 2003 2003 ;40():498-499 9193 UI - 8901 AU - Quiroz-Garcia B AU - Hernandez L AU - Toscano RA AU - Sterner O AU - Delgado G AD - Lund Univ, Dept Organ & Bioorgan Chem, SE-22100 Lund, SwedenUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoSterner, O, Lund Univ, Dept Organ & Bioorgan Chem, POB 124, SE-22100 Lund, Sweden TI - Base-catalyzed intramolecular condensation of tokinolide B AB - The novel pentacyclic compound cyclotokinolide B was obtained from the natural phthalide tokinolide B under basic conditions, via the chemoselective gamma-enol lactone opening followed by a Michael addition of the generated carbanion to the enone and subsequent equilibration. This result confirms that some dimeric phthalides undergo intramolecular cyclizations in basic media. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Sweden PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000181575200017 L2 - RING-CLOSURE; DILIGUSTILIDE; UMBELLIFERAE; RULES SO - Tetrahedron Letters 2003 ;44(12):2509-2512 9194 UI - 7018 AU - Quiroz-Mercado H AU - Guerrero-Naranjo J AU - Suarez-Tata L AU - Murillo-Lopez S AU - Reategui G AU - Leizaola-Mercado C AU - Garcia G AU - Morfin L AU - Charles ST AD - APEC, Retina Serv, Mexico City, DF, MexicoUniv Tennessee, Dept Ophthalmol, Memphis, TN 38163, USA TI - Vitrectomy using continuous infusion of oxygenated (ViCIOP) and non-oxygenated Perfluorocarbons (ViCIP). A new technique for vitrectomy MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607000435 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U87-U87 9195 UI - 7417 AU - Quiroz Y AU - Bravo J AU - Herrera-Acosta J AU - Johnson RJ AU - Rodriguez-Iturbe B AD - Hosp Univ, Renal Serv & Lab, Maracaibo, VenezuelaFUNDACITE Zulia, INBIOMED, Maracaibo, VenezuelaInst Nacl Cardiol Ignacio Chavez, Dept Nephrol, Mexico City, DF, MexicoBaylor Coll Med, Div Nephrol, Houston, TX 77030, USARodriguez-Iturbe, B, Univ Austral Chile, Soc Latinoamer Nephrol & Hipertens, Lab Nefrol, Hosp Reg, Bueras 1003,Pisa 2, Valdivia, Chile TI - Apoptosis and NF kappa B activation are simultaneously induced in renal tubulointerstitium in experimental hypertension AB - Background. Oxidative stress is known to induce apoptosis and activation of pro-inflammatory transcription factor nuclear factor kappa B (NFkappaB), which are biologic effects that may play a role in the renal damage associated with arterial hypertension. We investigated if increased apoptosis and NFkappaB activation were present in experimental models of hypertension. Methods. Sprague-Dawley rats fed with regular rodent chow and free access to water were studied. The Ang II group (N = 6) received 435 ng/kg/min of angiotensin II during 2 weeks by subcutaneous minipumps. The L-NAME group (N = 5) received N-omega-nitro-L-arginine-methyl-ester (L-NAME) in the drinking water (70 mg/100 mL) for 3 weeks. The control group consisted of 6 rats. Systolic blood pressure (tail cuff plethysmography), serum creatinine, and proteinuria were determined weekly. Kidneys were examined for superoxide-positive cells (histochemistry) and for apoptosis [terminal deoxynucleotidyl transferase-mediated uridine triphosphate nick-end labeling (TUNEL)-positive cells], proliferation [proliferating cell nuclear antigen (PCNA)-positive cells), and activation of NFkappaB (p65 subunit) with the appropriate antibodies. Results. As expected, hypertension developed in experimental groups. Tubulointerstitial superoxide-positive cells were increased 7 times (P < 0.001), TUNEL-positive cells were increased 3 to 4 times (P < 0.001), PCNA-positive cells were increased 20 to 30 times (P < 0.001), and NFκB activation was increased 4 to 5 times (P < 0.001) in the experimental groups. NFkappaB expression correlated with the number of interstitial lymphocytes (r = 0.667, P < 0.01) and macrophages (r = 0.835, P < 0.001). Conclusion. Angiotensin II infusion and L-NAME administration induce oxidative stress and increased apoptosis and activation of the transcription factor NFkappaB. These effects may participate in the development of progressive renal injury resulting from uncontrolled hypertension MH - Chile MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 5 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000185515400006 L2 - SALT-SENSITIVE HYPERTENSION; NITRIC-OXIDE SYNTHESIS; OXIDATIVE STRESS; BLOOD-PRESSURE; SUPEROXIDE PRODUCTION; IMMUNE CELLS; RATS; EXPRESSION; INFLAMMATION; INFILTRATION SO - Kidney International 2003 ;64():S27-S32 9196 UI - 9368 AU - Rabago F AU - Mandelis A AD - Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON, CanadaUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, SLP, MexicoRabago, F, Univ Toronto, Dept Mech & Ind Engn, Photothermal & Optoelect Diagnost Labs, Toronto, ON, Canada TI - Common-mode-rejection demodulation lock-in technique for high-resolution characterization of ion implantation in silicon wafers AB - In this article, we present the use of frequency-scan and lock-in common-mode-rejection demodulation (CMRD) laser photothermal radiometry to the study of B+, P+, and As+, ion implanted silicon wafers, with and without surface-grown oxides. The implantation energy of the wafers was 100 keV in all the wafers and doses ranged between 1x10(11)-1x10(13) ions/cm(2). The CMRD technique is a new demodulation method that was tested after a theoretical study and its implementation in hardened Zr-2.5Nb samples. This technique is applied to silicon ion-implantation monitoring and we report a superior signal resolution in dose range where the conventional frequency scans essentially overlapped: B+ implants in the dose range 1x10(12)-1x10(13) ions/cm(2), and P+ implants in the 1x10(11)-10(13) ions/cm(2) range. In all other cases where conventional frequency scans could resolve implantation doses, CMRD did not present any significant resolution advantages. It was further established that the pulse separation increment deltaDelta is the critical CMRD wave form parameter, which controls dose resolution through substantial signal background and noise suppression. The dose resolution improvements afforded by the CMRD technique may be important toward better control of the ion-implantation process in electronic devices, in a dose range which has traditionally been difficult to monitor optically owing to the effects introduced by the early stages of the amorphization process in the implanted layer. (C) 2003 American Institute of Physics MH - Canada MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000180451900098 L2 - INFRARED PHOTOTHERMAL RADIOMETRY; THERMAL-WAVE DETECTION; SI WAFERS SO - Review of Scientific Instruments 2003 ;74(1):624-627 9197 UI - 9230 AU - Rafael H AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Vaudois, Ctr Hosp, Lausanne, SwitzerlandOsaka City Univ, Osaka 558, JapanRafael, H, Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - Intracranial anastomosis MH - Japan MH - Mexico|Distrito Federal MH - Switzerland PB - CHARLOTTESVILLE: AMER ASSOC NEUROLOGICAL SURGEONS RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology;Surgery U5 - J;Letter AV - English IS - 0022-3085 UR - ISI:000180873300032 L2 - DISEASE SO - Journal of Neurosurgery 2003 ;98(2):439-440 9198 UI - 8275 AU - Rahimian A AU - Romero EM AD - Cantor Seinuk Grp, New York, NY, USAEnrique Martinez Romero SA, Mexico City, DF, MexicoRahimian, A, Cantor Seinuk Grp, New York, NY, USA TI - Super structure MH - Mexico|Distrito Federal MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Civil U5 - J;Article AV - English IS - 0885-7024 UR - ISI:000183397800024 SO - Civil Engineering 2003 ;73(6):63-69 9199 UI - 7968 AU - Rakov N AU - Ramos FE AU - Xiao MF AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Strong second-harmonic radiation from a thin silver film with randomly distributed small holes AB - We report the observation of strong second-harmonic radiation from a thin silver film containing randomly distributed small holes. A pulsed laser beam of wavelength 1064 nm impinges at an angle of incidence 45degrees on the film, and the reflection is collected by a CCD detector and analysed by a high-resolution spectrometer. Strong second-harmonic radiation was observed at the wavelength of 532 nm with a halfwidth of 40 nm MH - Mexico|Baja California MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000184012900002 L2 - OPTICAL-TRANSMISSION; SUBWAVELENGTH HOLES; METAL-FILM; SURFACE; GENERATION; GOLD SO - Journal of Physics-Condensed Matter 2003 ;15(23):L349-L352 9200 UI - 7984 AU - Rakshit S AU - Winter P AU - Tekeoglu M AU - Munoz JJ AU - Pfaff T AU - ko-Iseppon AM AU - Muehlbauer FJ AU - Kahl G AD - Univ Frankfurt, Bioctr, D-60439 Frankfurt, GermanyIndian Inst Pulses Res, Kanpur 208024, Uttar Pradesh, IndiaColegio Posgrad, Montecillo 56230, Edo De Mexico, MexicoUniv Fed Pernambuco, CCB, Recife, PE, BrazilWashington State Univ, USDA ARS, Grain Legume Genet & Physiol Res Unit, Pullman, WA 99164, USAWashington State Univ, Dept Crop & Soil Sci, Pullman, WA 99164, USAKahl, G, Univ Frankfurt, Bioctr, D-60439 Frankfurt, Germany TI - DAF marker tightly linked to a major locus for Ascochyta blight resistance in chickpea (Cicer arietinum L.) AB - Resistance of chickpea against the disease caused by the ascomycete Ascochyta rabiei is encoded by two or three quantitative trait loci, QTL1, QTL2 and QTL3. A total of 94 recombinant inbred lines developed from a wide cross between a resistant chickpea line and a susceptible accession of Cicer reticulatum, a close relative of cultivated chickpea, was used to identify markers closely linked to QTL1 by DNA amplification fingerprinting in combination with bulked segregant analysis. Of 312 random 10mer oligonucleotides, 3 produced five polymorphic bands between the parents and bulks. Two of them were transferred to the population on which the recent genetic map of chickpea is based, and mapped to linkage group 4. These markers, OPS06-1 and OPS03-1, were linked at LOD-scores above 5 to markers UBC733B and UBC181A flanking the major ascochyta resistance locus. OPS06-1 mapped at the peak of the QTL between markers UBC733B (distance 4.1 cM) and UBC181A (distance 9.6 cM), while OPS03-1 mapped 25.1 cM away from marker UBC733B on the other flank of the resistance locus. STMS markers localised on this linkage group were transferred to the population segregating for ascochyta resistance. Three of these markers were closely linked to QTL1. Twelve of 14 STMS markers could be used in both populations. The order of STMS markers was essentially similar in both populations, with differences in map distances between them. The availability of flanking STMS markers for the major resistance locus QTL1 will help to elucidate the complex resistance against different Ascochyta pathotypes in future MH - Brazil MH - Germany MH - India MH - Mexico|Estado De Mexico MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000184071500003 L2 - Ascochyta rabiei;chickpea;disease resistance;DNA amplification fingerprinting;genetic map;DISEASE-RESISTANCE; LINKAGE MAP; DNA; IDENTIFICATION; PRIMERS; GENES; AMPLIFICATION; POPULATIONS; INHERITANCE; LENTIL SO - Euphytica 2003 ;132(1):23-30 9201 UI - 9127 AU - Ramakrishnan U AU - Gonzalez-Cossio T AU - Neufeld LM AU - Rivera J AU - Martorell R AD - Emory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322, USAInst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca, Morelos, MexicoRamakrishnan, U, Emory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, 1518 Clifton Rd NE, Atlanta, GA 30322 USA TI - Multiple micronutrient supplementation during pregnancy does not lead to greater infant birth size than does iron-only supplementation: a randomized controlled trial in a semirural community in Mexico AB - Background: Little is known about the benefits of prenatal multivitamin and mineral supplements in reducing low birth weight. Objective: We conducted a randomized, double-blind clinical trial in semirural Mexico to compare the effects of multiple micronutrient (MM) supplements with those of iron supplements during pregnancy on birth size. Design: Pregnant women (n = 873) were recruited before 13 wk of gestation and received supplements 6 d/wk at home, as well as routine antenatal care, until delivery. Both supplements contained 60 mg Fe, but the MM group also received 1-1.5 times the recommended dietary allowances of several micronutrients. Results: At recruitment, the women in the 2 groups were not significantly different in age, parity, economic status, height, or hemoglobin concentration but differed significantly in marital status (4.6% and 2.0% of women in the MM and iron-only groups, respectively, were single mothers) and mean (+/- SD) body mass index (in kg/m(2); 24.6 +/- 4.3 and 23.8 +/- 3.9 in the iron-only and MM groups, respectively). Losses to follow-up (25%) and compliance (95%) did not differ significantly between the groups. In intent-to-treat analyses (MM group: n = 323; iron-only group: n = 322), mean (+/- SD) birth weight (2.981 +/- 0.391 and 2.977 +/- 0.393 kg in the MM and iron-only groups, respectively) and birth length (48.61 +/- 1.82 and 48.66 +/- 1.83 cm in the MM and iron-only groups, respectively) did not differ significantly between the groups. Conclusion: These findings suggest that MM supplementation during pregnancy does not lead to greater infant birth size than does iron-only supplementation MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 28 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000181210600031 L2 - iron;multivitamins;minerals;supplements;pregnancy;intrauterine growth retardation;Mexico;birth size;PLACEBO-CONTROLLED TRIAL; ZINC SUPPLEMENTATION; INTRAUTERINE GROWTH; WOMEN; DETERMINANTS; NUTRITION; DURATION; ANEMIA SO - American Journal of Clinical Nutrition 2003 ;77(3):720-725 9202 UI - 7217 AU - Ramirez-Coronel MA AU - Viniegra-Gonzalez G AU - Darvill A AU - Augur C AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoIRD Mexico, Mexico City 11530, DF, MexicoUniv Georgia, Complex Carbohydrate Res Ctr, Athens, GA 30602, USAAugur, C, Univ Aix Marseille 1, CESB, ESIL, IRD,Lab Microbiol, Case 925,163 Ave Luminy, F-13288 Marseille 9, France TI - A novel tannase from Aspergillus niger with beta-glucosidase activity AB - An extracellular tannase was produced from solid-state cultures of Aspergillus niger. The enzyme was purified to homogeneity from the cell-free culture both by preparative isoelectric focusing and by FPLC using anion-exchange and gel-filtration chromatography. SDS-PAGE analysis as well as gel localization studies of purified tannase indicated the presence of two enzyme forms, with molecular masses of 90 kDa and 180 kDa. The tannase had an isoelectric point of 3(.)8, a temperature optimum of 60-70 degreesC and a pH optimum of 6(.)0. The substrate specificity of the tannase was determined by HPLC analysis of tannin substrates and products. The enzyme was able to remove gallic acid from both condensed and hydrolysable tannins. Internal sequences were obtained from each of the gel-purified and trypsin-digested tannase forms. The peptide sequences obtained from both forms were identical to sequences within a beta-glucosidase from Aspergillus kawachii. The purified tannase was tested for beta-glucosidase activity and was shown to hydrolyse cellobiose efficiently. However, no beta-glucosidase activity was detected when the enzyme was assayed in the presence of tannic acid MH - France MH - Mexico|Distrito Federal MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 18 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000186008200025 L2 - SOLID-STATE; PHYSICOCHEMICAL PROPERTIES; FUNGAL TANNASE; TANNIC-ACID; PURIFICATION; FERMENTATION; HYDROLYSIS; KAWACHII; GENE SO - Microbiology-Sgm 2003 ;149():2941-2946 9203 UI - 7237 AU - Ramirez-Mares MV AU - De Mejia EG AD - Univ Queretaro, Sch Chem, PROPAC, Mexico City, DF, MexicoUniv Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801, USARamirez-Mares, MV, Univ Queretaro, Sch Chem, PROPAC, Mexico City, DF, Mexico TI - Comparative study of the antioxidant effect of ardisin and epigallocatechin gallate in rat hepatocytes exposed to benomyl and 1-nitropyrene AB - The objective of this study was to compare the antioxidant effect of ardisin and epigallocatechin 3-O-gallate (EGCG) in hepatocytes exposed to either benomyl or 1-nitropyrene (I-NP). Rat hepatocytes were incubated in a serum-free medium with non-cytotoxic concentrations of either ardisin (0.27 mug/ml) or EGCG (3 mug/ml), and with either benomyl (35 mug/ml) or 1-NP (0.25 mug/ ml). The level of malondialdehyde (MDA) as a marker of lipid peroxidation was determined, as well as the content of glutathione (GSH) and the activities of glutathione peroxidase (GPx) and glutathione reductase (GR). In comparison to the control, the concentration of GSH improved 282% (P < 0.05) and 260% (P < 0.05) after the cells were pre-incubated with ardisin or EGCG and then exposed to benomyl, respectively. The activity of GPx decreased 55% with ardisin (P < 0.05) and 51 % with EGCG (P < 0.05), and MDA decreased 7% and 23% (P < 0.05) with the same treatments. The concentration of GSH also improved when the cells were incubated with either EGCG (49%, P < 0.05) or ardisin (83%, P < 0.05) simultaneously with 1-NP, relative to 1-NP alone. Moreover, ardisin decreased MDA formation by 65% (p < 0.05), and enhanced the activity of GR by 137% (P < 0.05). These results suggest that ardisin is a better suppressor of lipid peroxidation induced by benomyl and 1-NP than EGCG. It is concluded that ardisin and EGCG are potent antioxidants that can afford protection against free radical mediated diseases. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Food Science & Technology;Toxicology U5 - J;Article AV - English IS - 0278-6915 UR - ISI:000185959100011 L2 - ardisin;epigallocatechin gallate;benomyl;1-nitropyrene;oxidative stress;hepatocytes;LIPID-PEROXIDATION; CARCINOGENIC 1-NITROPYRENE; CULTURED-HEPATOCYTES; TOPOISOMERASE-I; TEA CATECHINS; GLUTATHIONE; CYTOTOXICITY; METABOLISM; COMPRESSA; EXTRACT SO - Food and Chemical Toxicology 2003 ;41(11):1527-1535 9204 UI - 8159 AU - Ramirez-Medeles MD AU - Aguilar MB AU - Miguel RN AU - Bolanos-Garcia VM AU - Garcia-Hernandez E AU - Soriano-Garcia M AD - UNAM, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUAM X, Dept Sistemas Biol, Mexico City 04960, DF, MexicoUNAM, Inst Neurobiol, Lab Neurofarmacol Marina, Juriquilla 76230, Qro, MexicoUNAM, Inst Neurobiol, Unidad Bioquim Anal, Juriquilla 76230, Qro, MexicoUniv Cambridge, Dept Biochem, Cambridge CB2 1GA, EnglandSoriano-Garcia, M, UNAM, Inst Quim, Dept Bioquim, Mexico City 04510, DF, Mexico TI - Amino acid sequence, biochemical characterization, and comparative modeling of a nonspecific lipid transfer protein from Amaranthus hypochondriacus AB - Plant nonspecific lipid transfer proteins (nsLTPs) are characterized by their ability to bind a broad range of hydrophobic ligands in vitro. Their biological function has not yet been elucidated, but they could play a major role in plant defense to physical and biological stress. An nsLTP was isolated from Amaranthus hypochondriacus seeds and purified by gel filtration and reversed-phase high-performance liquid chromatography techniques. The molecular mass of the protein as determined by mass spectrometry is 9747.29 Da. Data from amino acid sequence, circular dichroism and binding/displacement of a fluorescent lipid revealed that it belongs to the nsLTP1 family. The protein shows the alpha-helical secondary structure typical for plant nsLTPs 1 and shares 40 to 57% sequence identity with nsLTPs 1 from other plant species and 100% identity with an nsLTP1 from Amaranthus caudatus. A model structure of the protein in complex with stearate based on known structures of maize and rice nsLTPs 1 suggests a protein fold complexed with lipids closely related to that of maize nsLTP1. (C) 2003 Elsevier Science (USA). All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0003-9861 UR - ISI:000183784800004 L2 - lipid transfer protein;Amaranth;amino acid sequence;pyrene fluorescence;comparative modeling;CRYSTAL-STRUCTURE; BINDING PROTEINS; PLANT DEFENSE; EXPRESSION; GENE; RESOLUTION; DATABASE; FAMILY; SEEDS SO - Archives of Biochemistry and Biophysics 2003 ;415(1):24-33 9205 UI - 8170 AU - Ramirez-Pastor AJ AU - Bulnes F AU - Zgrablich G AD - Univ Nacl San Luis, CONICET, Dept Fis, Lab Ciencias Superficies & Med Porosos, RA-5700 San Luis, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoZgrablich, G, Univ Nacl San Luis, CONICET, Dept Fis, Lab Ciencias Superficies & Med Porosos, Chacabuco 917, RA-5700 San Luis, Argentina TI - Adsorption of interacting particles on square, honeycomb and triangular correlated heterogeneous surfaces AB - Adsorption of interacting particles on highly correlated heterogeneous surfaces is studied through grand canonical Monte Carlo simulation and the effective substates approximation in the framework of the lattice-gas model. The adsorptive surface potential has been characterized by patches of weak and strong adsorbing sites arranged in a deterministic chessboard structure, with square, triangular or hexagonal geometry. The effects of heterogeneity and nearest-neighbor adsorbate-adsorbate interactions on the adsorption process are analyzed for square, honeycomb and triangular geometries and different patch sizes. (C) 2003 Elsevier Science B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000183699500016 L2 - adsorption kinetics;Monte Carlo simulations;molecule-solid reactions;ENERGETIC TOPOGRAPHY; DIFFUSION SO - Surface Science 2003 ;536(1-3):97-113 9206 UI - 9030 AU - Ramirez-Saad HC AU - Sessitsch A AU - Akkermans ADL AD - Univ Wageningen & Res Ctr, Microbiol Lab, NL-6703 CT Wageningen, NetherlandsUniv Automoma Metropolitana Xochimilco, Dept Biol Syst, Coyoacan 04960, DF, MexicoARC Seibersdorf Res GMBH, Dept Environm & Life Sci, A-2444 Seibersdorf, AustriaAkkermans, ADL, Univ Wageningen & Res Ctr, Microbiol Lab, Hesselink van Suchtelenweg 4, NL-6703 CT Wageningen, Netherlands TI - Molecular diversity in the bacterial community and the fluorescent pseudomonads group in natural and chlorobenzoate-stressed peat-forest soil AB - Bacterial community shifts in a soil microcosm spiked with 3-chlorobenzoate or 2,5-dichlorobenzoate were monitored. The V6-V8 variable regions of soil bacterial 16S rRNA and rDNA were amplified and separated by temperature gradient gel electrophoresis (TGGE) profiling. Culturing in the presence of 2.5 mM chlorinated benzoates suppressed 10 to 100 fold the total aerobic bacterial community but had no effect on the diversity within the group of fluorescent pseudomonads. In contrast, the uncultured bacterial community showed a decrease in the number of bands in the TGGE profiles of the chlorobenzoate-spiked treatments. Accordingly, the Shannon's diversity and equitability indices of these treatments reflected a decreasing trend in time. The approach allowed a direct assessment of community shifts upon contamination of soil MH - Austria MH - Mexico|Distrito Federal MH - Netherlands PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0944-5013 UR - ISI:000181283700006 L2 - TGGE;16S rRNA;chlorobenzoate;diversity index;equitability index;soil;16S RIBOSOMAL-RNA; GRADIENT GEL-ELECTROPHORESIS; MICROBIAL DIVERSITY; GENES; HYBRIDIZATION; NETHERLANDS; PCR; MICROORGANISMS; POPULATIONS; SEQUENCES SO - Microbiological Research 2003 ;158(1):47-54 9207 UI - 9394 AU - Ramirez A AU - Gutierrez R AU - Diaz G AU - Gonzalez C AU - Perez N AU - Vega S AU - Noa M AD - Univ Autonoma Metropolitana, Unidad Xochimilco, Dept Prod Agr & Anim, Coyoacan 04960, DF, MexicoUniv Agr La Habana, Fac Med Vet, Dept Prevenc, Havana 32700, CubaRamirez, A, Univ Autonoma Metropolitana, Unidad Xochimilco, Dept Prod Agr & Anim, Calzada Hueso 1100,Col Villa Quietud, Coyoacan 04960, DF, Mexico TI - High-performance thin-layer chromatography-bioautography for multiple antibiotic residues in cow's milk AB - An analytical method to identify and quantify multiple antibiotic residues (chloramphenicol, ampicillin, benzylpenicillin, dicloxacillin and erythromycin) in cow's milk by high-performance thin-layer chromatography (HPTLC) combined with bioautography was developed. The test microorganism used for bioautography was Bacillus subtilis ATCC 6633. Antibiotic residues were extracted with acetonitrile, fat eliminated with petroleum ether and residues isolated with dichloromethane The sensitivity of the method guarantees the detection of the above-mentioned antibiotics at levels below maximum residue limits (MRL) allowed for milk. Percentage recoveries ranged between 90 and 100%, with coefficients of variation between 7.2 and 21.3%. Some advantages of this methodology over thin-layer chromatography (TLC)/bioautography are also discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1570-0232 UR - ISI:000180381700011 L2 - bioautography;antibiotics;TISSUES SO - Journal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences 2003 ;784(2):315-322 9208 UI - 7981 AU - Ramirez JA AU - Rodriguez-Sosa R AU - Morales OG AU - Vazquez M AD - Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88740, Tamaulipas, MexicoUniv Autonoma Tamaulipas, Inst Ecol & Alimentos, Cd Victoria, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Dept Quim Analit, Lugo 27002, SpainRamirez, JA, Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Dept Food Sci & Technol, Calle 16 & Lago Chapala, Reynosa 88740, Tamaulipas, Mexico TI - Preparation of surimi gels from striped mullet (Mugil cephalus) using an optimal level of calcium chloride AB - Optimal conditions for the setting phenomenon in surimi, prepared from striped mullet (Mugil cephalus) by adding calcium chloride, were determined. Concentrations of calcium chloride (0-0.4%), temperature (25-45 degreesC), and time (30-90 min) were optimised to improve the shear stress and shear strain properties of fish gels. After incubating under selected conditions for setting, all gels were cooked at 90 degreesC for 15 min. Shear stress was mainly affected by the calcium concentration, while shear strain was moderately affected. Maximum shear stress (89.6 kPa) was obtained by employing a concentration of calcium of 0.4%, a temperature of 39.3 degreesC and a time of 1 h. Under these conditions, a shear strain of 1.47 was obtained. The results suggest that the mechanical properties of surimi gels can be improved, simply, by adjusting the level of calcium to induce activity of the endogenous transglutaminase. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000184047800012 L2 - surimi;calcium;shear stress;shear strain;Mugil cephalus;striped mullet;GULF-OF-MEXICO; TRANSGLUTAMINASE; INHIBITION SO - Food Chemistry 2003 ;82(3):417-423 9209 UI - 6453 AU - Ramirez MA AU - Cristal A AU - Veidenbaum AV AU - Villa L AU - Valero M AD - UPC, Comp Architecture Dept, Barcelona, SpainUniv Calif Irvine, Irvine, CA, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoRamirez, MA, UPC, Comp Architecture Dept, Barcelona, Spain TI - A simple low-energy instruction wakeup mechanism AB - Instruction issue consumes a large amount of energy in out of order processors, largely in the wakeup logic. Proposed solutions to the problem require prediction or additional hardware complexity to reduce energy consumption- and, in some cases, may have a 'negative impact on processor performance. This paper proposes a mechanism for instruction wakeup, which uses a multi-block instruction queue design. The blocks are turned off until the mechanism determines which blocks to, access on wakeup using a simple successor tracking mechanism. The proposed-approach is shown to require as little as 1.5 comparisons per committed instruction for SPEC20,00 benchmarks MH - Mexico|Distrito Federal MH - Spain MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000188038200008 L2 - superscalar processors;out of order execution;instruction window;instruction wake up;low power;CAM SO - High Performance Computing 2003 ;2858():99-112 9210 UI - 7853 AU - Ramirez MA AU - Trapaga G AU - McKelliget J AD - Met Grad Ctr, Inst Tecnol Morelia, Morelia 58120, Michoacan, MexicoCinvestav Unidad Queretaro, Fraccionamiento Real Juriquilla, Libramiento Norponiente, Queretaro, Qro, MexicoUniv Massachusetts Lowell, Dept Mech Engn, Lowell, MA 01854, USARamirez, MA, Met Grad Ctr, Inst Tecnol Morelia, Avenida Tecnol 1500,Col Lomas Santiaguito, Morelia 58120, Michoacan, Mexico TI - A comparison between two different numerical formulations of welding arc simulation AB - A mathematical model was developed to simulate gas tungsten arc welding in order to compare two distinct numerical formulations to represent the electromagnetic problem in welding arcs, i.e. the 'potential' and the 'magnetic' approaches. Both formulations, representing the same physics but mathematically and numerically different, are tested against each other and against some experimental measurements available and other numerical studies reported in the literature. The major differences between the two formulations were found in predicting the magnetic and the current density fields. In general, the magnetic approach seems to be more straightforward to implement but the potential approach shows superiority in predicting isotherms, current and heat flux densities at the anode, since they show better agreement with experimental measurements. In view of the experience developed and the analysis carried out in this paper, it is clear to the authors that employing the potential formulation results in an easier, more convenient, and numerically better-behaved approach to represent welding arcs MH - Mexico|Michoacan MH - Mexico|Queretaro MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0965-0393 UR - ISI:000184394200017 L2 - FREE-BURNING ARCS; PREDICTION; MODEL; ARGON; ANODE; FLOW SO - Modelling and Simulation in Materials Science and Engineering 2003 ;11(4):675-695 9211 UI - 8399 AU - Ramirez MI AU - Azcarate JG AU - Luna L AD - Natl Autonomous Univ Mexico, Inst Geog, Mexico City 04510, DF, MexicoUniv Santiago Compostela, Super Polytech Sch, Dept Bot, Lugo 27002, SpainRamirez, MI, Natl Autonomous Univ Mexico, Inst Geog, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Effects of human activities on monarch butterfly habitat in protected mountain forests, Mexico AB - Since the monarch butterfly overwintering habitat was discovered in the mountainous fir forests in central Mexico three presidential decrees have been issued (1980, 1986, 2001) to protect it. But these forests are the source of livelihood for many local people, whose activities (wood extraction and clearance for subsistence farming) represent a major threat to the forests, and thus to the butterfly population. This study identifies important deforestation, disturbance, and recovery processes caused by human activities in the protected areas and their surroundings. Contrary to our expectations, the protected areas have been most negatively affected by human activities, whereas areas devoted to multiple uses have been more adequately preserved MH - Mexico|Distrito Federal MH - Spain PB - OTTAWA: CANADIAN INST FORESTRY RP - NOT IN FILE U3 - TC 1 U4 - Forestry U5 - J;Article AV - English IS - 0015-7546 UR - ISI:000183036000039 L2 - monarch butterfly habitat;deforestation;forest disturbance;protected areas;AREA SO - Forestry Chronicle 2003 ;79(2):242-246 9212 UI - 7690 AU - Ramirez NC AU - Perez-Montiel MD AD - Ohio State Univ, Columbus, OH 43210, USAInst Nacl Cancerol, Mexico City, DF, Mexico TI - CD10, inhibin, H-caldesmon, and calponin expression in ovarian adult granulosa cell tumor with diffuse (sarcomatoid) growth pattern MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000180720100954 SO - Modern Pathology 2003 ;16(1):207A-208A 9213 UI - 7808 AU - Ramirez NC AU - Perez-Montiel MD AD - Ohio State Univ, Columbus, OH 43210, USAInst Nacl Cancerol, Mexico City, DF, Mexico TI - CD10, inhibin, h-caldesmon, and calponin expression in ovarian adult granulosa cell tumor with diffuse (Sarcomatoid) growth pattern MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000180732500957 SO - Laboratory Investigation 2003 ;83(1):207A-208A 9214 UI - 7802 AU - Ramirez T AU - Garcia-Montalvo V AU - Wise C AU - Cea-Olivares R AU - Poirier LA AU - Herrera LA AD - UNAM, Inst Nacl Cancerol, Inst Invest Biomed, Unidad Invest Biomed & Canc, Mexico City, DF, MexicoUNAM, Inst Quim, Mexico City, DF, MexicoNatl Ctr Toxicol Res, Little Rock, AR, USAHerrera, LA, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Med Genom & Toxicol Ambiental, Ciudad Univ,POB 70-228, Mexico City 04510, DF, Mexico TI - S-adenosyl-L-methionine is able to reverse micronucleus formation induced by sodium arsenite and other cytoskeleton disrupting agents in cultured human cells AB - Deficiencies of folic acid and methionine, two of the major components of the methyl metabolism, correlate with an increment of chromosome breaks and micronuclei. It has been proposed that these effects may arise from a decrease of S-adenosyl-L-methionine (SAM), the universal methyl donor. Some xenobiotics, such as arsenic, originate a reduction of SAM levels, and this is believed to alter some methylation processes (e.g. DNA methylation). The aim of the present work was to analyze the effects of exogenous SAM on the micronucleus (MN) frequency induced by sodium arsenite in human lymphocytes treated in vitro and to investigate whether these effects are related to DNA methylation. Results showed a reduction in the MN frequency in cultures treated with sodium arsenite and SAM compared to those treated with arsenite alone. To understand the mechanism by which SAM reduced the number of micronucleated cells, its effect on MN induced by other xenobiotics was also analyzed. Results showed that SAM did not have any effect on the increase in MN frequency caused by alkylating (mitomycin C or cisplatin) or demethylating agents (5-azacytidine, hydralazine, ethionine and procainamide), but it reduced the number of micronucleated cells in those treated with agents that inhibit microtubule polymerization (albendazole sulphoxide and colcemid). Since albenclazole sulphoxide and colcemid inhibit microtubule polymerization, we decided to evaluate the effect of SAM on microtubule integrity. Data obtained from these evaluations showed that sodium arsenite, albendazole sulphoxide, and colcemid affect the integrity and organization of microtubules and that these effects are significantly reduced when cultures were treated at the same time with SAM. The data taken all together point out that the positive effects of SAM could be due to its ability to protect microtubules through an unknown mechanism. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0027-5107 UR - ISI:000184535200007 L2 - SAW;micronucleus;NMR;fibroblasts;lymphocytes;PERFORMANCE LIQUID-CHROMATOGRAPHY; DNA METHYLATION; BREAST-CANCER; FOLATE-DEFICIENCY; MAMMALIAN-CELLS; GENE-EXPRESSION; RAT-LIVER; ADENOSYLMETHIONINE; DAMAGE; ADENOSYLETHIONINE SO - Mutation Research-Fundamental and Molecular Mechanisms of Mutagenesis 2003 ;528(1-2):61-74 9215 UI - 7922 AU - Ramirez T AU - Thoma K AU - Taja-Chayeb L AU - Efferth T AU - Herrera LA AU - Halatsch ME AU - Gebhart E AD - Univ Erlangen Nurnberg, Inst Human Genet, D-91054 Erlangen, GermanyNatl Autonomous Univ Mexico, Inst Invest Biomed, Inst Nacl Cancerol, Unidad Invest Biomed Canc, Mexico City 04510, DF, MexicoVirtual Campus Rhineland Palatinate, D-55033 Mainz, GermanyUniv Gottingen, Dept Neurosurg, D-37075 Gottingen, GermanyGebhart, E, Univ Erlangen Nurnberg, Inst Human Genet, Schwabachanlage 10, D-91054 Erlangen, Germany TI - Specific patterns of DNA copy number gains and losses in eight new glioblastoma multiforme cell lines AB - Eight cell lines newly established from glioblastoma multiforme were examined by comparative genomic hybridization for their patterns of genomic imbalance. The total number of DNA copy number alterations (CNAs) found in the eight cell lines varied between 15 and 24. This characterized the examined cell lines (or the tumors they were derived from) as distinctly progressed in karyotypic evolution. The most frequent CNAs were gains of the entire chromosome 6 or, at least, parts of it, and of 7p22, which were found in all eight cell lines. Other changes present in seven of the eight cell lines were gains of 3q26qter and the entire chromosome 7 and losses of segments on chromosome 4q (e.g., 4q34q35) and of the short arm of chromosome 10. Enh(3q21q25), dim(4q22q33) and dim(4qter), dim(13q22), enh(15q14), and enh(18q22q23) were found in six of the eight cell lines. Several other CNAs [e.g., dim(9p21)] were found in common in five or less of the eight lines. Using a hierarchical cluster analysis, the specific patterns of genomic imbalance allowed various groupings of the examined cell lines. Although a close relation could be confirmed among all examined lines on the basis of shared CNAs, two main groups could be roughly differentiated. Among those there were also more or less closely related subgroups. However, also alterations which were restricted to one single cell line each were found, e.g., dim(1q41qter), dim(2q22qter), enh(4p), dim(5p), dim(4p13pter), dim(8q21qter), enh(9p), dim(9q), dim(11p14pter), enh(12q15q23), enh(13q21), dim(14q21qter), dim (15q21qter), dim(19q), and enh(22q). The comparison of the obtained data on gains and losses of DNA copy numbers in specific chromosomal segments with the data on localization of genes possibly associated with the biology of glioblastoma multiforme additionally shows high conformity but also disparity of the examined cell lines among each other, as well as compared to primary glioblastoma multiforme. Eventually, each of the cell lines could be characterized by its specific pattern of genomic imbalance MH - Germany MH - Mexico|Distrito Federal PB - ATHENS: PROFESSOR D A SPANDIDOS RP - NOT IN FILE U3 - TC 6 U4 - Oncology U5 - J;Article AV - English IS - 1019-6439 UR - ISI:000184195600022 L2 - glioblastoma multiforme;comparative genomic hybridization;DNA copy number alterations;COMPARATIVE GENOMIC HYBRIDIZATION; GROWTH-FACTOR RECEPTOR; MALIGNANT GLIOMA; CHROMOSOMAL-ABNORMALITIES; SOLID TUMORS; IMBALANCES; GRADE; TUMORIGENICITY; EXPRESSION; RESISTANCE SO - International Journal of Oncology 2003 ;23(2):453-460 9216 UI - 7380 AU - Ramon F AU - Hernandez-Falcon J AU - Bullock TH AD - UNAM, Fac Med, Div Estud Posgrado & Invest, Mexico City, DF, MexicoUNAM, Fac Med, Dept Fisiol, Mexico City, DF, MexicoUCSD, Scripps Inst, Dept Neurosc & Neurobiol, La Jolla, CA, USA TI - Electrophysiological signs of sleep in crayfish MH - Mexico|Distrito Federal MH - USA PB - WESTCHESTER: AMER ACADEMY SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000182841100291 SO - Sleep 2003 ;26():A118-A118 9217 UI - 2985 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Medina F AU - Jara LJ AU - Rosas J AU - Anaya JM AU - Font J AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainHosp Espec Siglo 21, Dept Rheumatol, Mexico City, DF, MexicoHosp Espec La Raza, Dept Rheumatol, Mexico City, DF, MexicoHosp Vilajoyosa, Dept Rheumatol, Alicante, SpainCIB, Dept Rheumatol, Medellin, Colombia TI - Coexistence of systemic autoimmune diseases with HCV infection in 155 patients. The hispamec study MH - Colombia MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551401098 SO - Annals of the Rheumatic Diseases 2003 ;62():332-333 9218 UI - 6952 AU - Ramos-Casals M AU - Lagrutta M AU - Claver G AU - Garcia-Carrasco M AU - Brito-Zeron P AU - Bove A AU - Cervera R AU - Ingelmo M AU - Font J AD - BUAP, Dept Rheumatol, Puebla, MexicoHosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, Spain TI - The clinical spectrum of vasculitic involvement in 630 patients with systemic lupus erythematosus MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432800961 SO - Arthritis and Rheumatism 2003 ;48(9):S376-S376 9219 UI - 6955 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Medina F AU - Jara L AU - Rosas J AU - Anaya JM AU - Font J AD - Hosp Clin Barcelona, Dep Autoimmune Dis, Barcelona, SpainIMSS, Hosp Siglo XXI, Dept Rheumatol, Mexico City, DF, MexicoIMSS, Hosp La Raza, Dept Rheumatol, Mexico City, DF, MexicoHosp Vilajoyosa, Dept Rheumatol, Alicante, SpainCIB, Dept Rheumatol, Medellin, Colombia TI - The HISPAMEC registry: HCV coexisting with systemic autoimmune diseases in 155 Hispanoamerican patients MH - Colombia MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801375 SO - Arthritis and Rheumatism 2003 ;48(9):S523-S523 9220 UI - 6957 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Brito-Zeron P AU - Font J AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainBUAP, Dept Rheumatol, Puebla, Mexico TI - Sjogren's syndrome or sarcoidosis? Clues to defining mimicry or coexistence in 59 cases MH - Mexico|Puebla MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801507 SO - Arthritis and Rheumatism 2003 ;48(9):S569-S569 9221 UI - 8921 AU - Ramos-Casals M AU - Garcia-Carrasco M AU - Lopez-Medrano F AU - Trejo O AU - Forns X AU - Lopez-Guillermo A AU - Munoz C AU - Ingelmo M AU - Font J AD - Univ Barcelona, Serv Malalties Autoimmunes, Dept Autoimmune Dis, Sch Med,Hosp Clin,IDIBAPS, E-08036 Barcelona, SpainUniv Barcelona, Sch Med, Dept Hepatol, Hosp Clin,IDIBAPS, E-08036 Barcelona, SpainUniv Barcelona, Sch Med, Dept Hematol, Hosp Clin,IDIBAPS, E-08036 Barcelona, SpainUniv Barcelona, Sch Med, Dept Med, Hosp Clin,IDIBAPS, E-08036 Barcelona, SpainBenemetria Univ Autonoma Puebla, Sch Med, Rheumatol Unit, Puebla, MexicoRamos-Casals, M, Univ Barcelona, Serv Malalties Autoimmunes, Dept Autoimmune Dis, Sch Med,Hosp Clin,IDIBAPS, C Villarroel 170, E-08036 Barcelona, Spain TI - Severe autoimmune cytopenias in treatment-naive hepatitis C virus infection - Clinical description of 35 cases AB - To determine the clinical characteristics and outcome of patients with chronic hepatitis C virus (HCV) infection presenting severe autoimmune cytopenia unrelated to interferon alpha therapy, we analyzed characteristics and outcomes of 35 patients with HCV (16 from our departments and 19 from the literature). We considered active autoimmune hemolytic anemia (AHA) as a decrease of at least 2 g/dL in hemoglobin levels, an increase of at least 0.6 mg/dL in the serum unconjugated bilirubin level, a reticulocyte count >5%, and a positive direct Coombs test. Severe neutropenia was defined as a neutrophil count <0.5 x 10(9)/L, and severe thrombocytopenia as a platelet count <30 x 10(9)/L. We identified the following cytopenias: AHA (17 cases), severe thrombocytopenia (16 cases), aplastic anemia (2 cases), severe neutropenia (1 case), refractory sideroblastic anemia (1 case), and pure red cell aplasia (1 case). Three patients simultaneously presented 2 types of severe cytopenias. Twenty-seven patients (77%) were female and 8 (23%) male, with a mean age at diagnosis of cytopenia of 51.7 years (range, 18-84 yr). Immunologic markers were detected in 19 (68%) of 28 patients, the most frequent being hypocomplementemia in 16 (57%), cryoglobulins in 15 (54%), antinuclear antibodies in 12 (43%), and rheumatoid factor in 5 (18%). Other associated processes were autoimmune diseases in 14 (50%) of 28 and human immunodeficiency virus (HIV) coinfection in 3 (9%) of 32. We found clinical and immunologic differences between HCV patients with AHA and those with severe thrombocytopenia. Patients with HCV-related AHA showed a higher prevalence of associated autoimmune diseases (71%), cryoglobulins (67%), and cirrhosis (59%). All had a good response to corticosteroids, but a poor prognosis (47% mortality). In contrast, patients with HCV-related severe thrombocytopenia had a lower prevalence of associated autoimmune diseases (11%), a poorer response to corticosteroids (55%), and lower mortality (6%), with HIV/HBV coinfections in some patients. The 35 cases presented demonstrate that different types of immune-mediated cytopenias may be severe and clinically significant in patients with HCV infection. Hemolytic anemia and severe thrombocytopenia were the most frequent cytopenias observed. Most patients responded well to corticosteroids, although a higher rate of mortality was observed in those with liver cirrhosis MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 21 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000181574400003 L2 - SEVERE APLASTIC-ANEMIA; IDIOPATHIC THROMBOCYTOPENIC PURPURA; NON-B HEPATITIS; CHRONIC LIVER-DISEASE; RED-CELL APLASIA; NON-A; HEMOLYTIC-ANEMIA; VIRAL-HEPATITIS; INTERFERON-ALPHA; IMMUNE THROMBOCYTOPENIA SO - Medicine 2003 ;82(2):87-96 9222 UI - 6841 AU - Ramos-Garcia R AU - Chiu-Zarate R AU - Nolte D AU - Melloch MR AD - Inst Nacl Astrofis Opt & Elect, Puebla, MexicoPurdue Univ, Dept Phys, W Lafayette, IN 47907, USAPurdue Univ, Sch Elect Engn, W Lafayette, IN 47907, USARamos-Garcia, R, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla, Mexico TI - Measurements of absorption coefficient and refractive index changes without the Kramers-Kronig relation in photorefractive quantum wells of GaAs AB - We measure the absorption coefficient and refractive index changes produced in photorefractive quantum wells of GaAs by using a high-sensitivity periodically phase-modulated two-wave mixing technique. The technique allows us to measure both the amplitude and phase of the refractive and absorption index changes simultaneously. Thus, there is no necessity to use the Kramers-Kronig relation when either the absorption or refractive index is known. We also measure the response time of the grating 2 formation in the frequency domain, yielding similar to15 mus at I-0 = 11 mW cm(-2), which shows that quantum wells of GaAs are one of the fastest materials for dynamic holography MH - Mexico|Puebla MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 1464-4258 UR - ISI:000186843300020 L2 - quantum wells;photorefractivity;dynamic holography;nonlinear optics;GRATINGS; GEOMETRY SO - Journal of Optics A-Pure and Applied Optics 2003 ;5(6):S514-S517 9223 UI - 6953 AU - Ramos-Remus C AU - Cardiel MH AU - de la Torre IG AU - rce-Salinas A AU - Huerta-Yanez G AU - Stalgis C AU - Thirion V AU - Guzman S AU - Ulloa S AU - Vazquez V AD - Scherling Plough, Mexico City, DF, MexicoSchering Plough Corp, Kenilworth, NJ 07033, USAInst Mexicano Seguro Social, Guadalajara, Jalisco, Mexico TI - Is there any difference in quality of life in rheumatic diseases according type of care in Mexico? Experience from a national quality of life study MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801039 SO - Arthritis and Rheumatism 2003 ;48(9):S404-S404 9224 UI - 6007 AU - Ramos J AU - Paulino L AU - Turrado J AU - Davalos F AU - Rivera J AU - Young R AD - Univ Guadalajara, Wood Cellulose & Paper Res Dept, Zapopan 45020, Jalisco, MexicoUniv Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706, USARamos, J, Univ Guadalajara, Wood Cellulose & Paper Res Dept, POB 52-43, Zapopan 45020, Jalisco, Mexico TI - Surface treatment of chemithermomechanical pulp (CTMP) to prevent brightness reversion AB - The photostabilizing effects of sodium borohydride (SB) and dimethyl sulfate (DS) chemical modification: thioglycerol (TG). 2.2'-oxydiethanethiol (OD). and 1-dodecanethiol (DC). as free radical scavengers; and benzophenone (BF), 2.4-dihydroxybenzophenone (DHBF)), and 2,2',4.4'-tetrahydroxybenzophenone (THBF) as UV-absorbers. were investigated for bleached chemithermomechanical pulps. All chemicals were applied by spraying on the surface of paper, in a sequential treatment of chemical modification. free radical scavengers and UV-absorbers. Certain additive combinations. such as SB-DS-TG-DHBF, exhibited a synergistic interaction effect that assured substantial brightness stabilization to light and heat treatment. Sequential treatment is somewhat better than when the additives are mixed before spraying on paper. Chemical modification treatment (SB + DS) on the surface of paper contributed only with 0.6% of the total brightness stabilization, whereas the free radical scavenger, TG, contributed with 25.1% and the UV absorber. DHBF, with the remaining 74.3% MH - Mexico|Jalisco MH - USA PB - BUCHAREST: EDITURA ACADEMIEI ROMANE RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0576-9787 UR - ISI:000220198200009 L2 - chemithermomechanical pulp;bleaching mechanical pulp;photostabilization of pulp;UV-absorbers;pulp brightness;chemical modification of pulp;paper surface properties;HIGH-YIELD PULPS; ALKALINE HYDROGEN-PEROXIDE; LIGNIN MODEL COMPOUNDS; MECHANICAL PULPS; THERMOMECHANICAL PULPS; SOFTWOOD LIGNIN; ASCORBIC-ACID; LIGHT; WOOD; OXIDATION SO - Cellulose Chemistry and Technology 2003 ;37(1-2):95-115 9225 UI - 7457 AU - Ramos PL AU - Guevara-Gonzalez RG AU - Peral R AU - scencio-Ibanez JT AU - Polston JE AU - rguello-Astorga GR AU - Vega-Arreguin JC AU - Rivera-Bustamante RF AD - IPN, Dept Ingn Genet, Ctr Invest & Estudios Avanzados, Irapuato 36500, Gto, MexicoCtr Ingn Genet & Biotecnol, Div Plantas, Havana, CubaInst Tecnol Celaya, Dept Ingn Bioquim, Inst Tecnol Celaya, Celaya, MexicoUniv Florida, Gulf Coast Res & Educ Ctr, Bradenton, FL 34203, USAInst Potosino Invest Cient & Tecnol AC, San Luis Potosi, MexicoRivera-Bustamante, RF, IPN, Dept Ingn Genet, Ctr Invest & Estudios Avanzados, Unidad Irapuato,Ap Postal 629, Irapuato 36500, Gto, Mexico TI - Tomato mottle Taino virus pseudorecombines with PYMV but not with ToMoV: Implications for the delimitation of cis- and trans-acting replication specificity determinants AB - Over the last decade, the tomato production in Cuba has been affected by new whitefly-associated diseases. In addition to the well-documented presence of Tomato yellow leaf curl virus (TYLCV) along the island, the occurrence of bipartite begomoviruses has also been reported. One of them, tentatively named Tomato mottle Taino virus (ToMoTV), has now been cloned and characterized at the molecular level. Its genomic organization is similar to other bipartite gemini-viruses. Phylogenetic analyses placed ToMoTV in a subcluster with other gemini-viruses isolated in the Caribbean Basin: Tomato mottle virus (ToMoV), Bean dwarf mosaic virus, Abutilon mosaic virus, Sida golden mosaic virus and Potato yellow mosaic virus (PYMV). Biolistic inoculation of tobacco and tomato plants with cloned viral DNA showed that ToMoTV pseudorecombines with PYMV GP as predicted by the identity of their iterative elements, whereas it does not show the same ability with ToMoV even when their replication-associated proteins (Rep and REn) show the highest percentage of similarity. A comparative analysis of Rep proteins from begomoviruses that are able to produce viable reassortants suggests that some key elements for virus replication specificity are located in the first ten amino acids of this protein MH - Cuba MH - Mexico|Guanajuato MH - Mexico|San Luis Potosi MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 10 U4 - Virology U5 - J;Article AV - English IS - 0304-8608 UR - ISI:000185484700004 L2 - LEAF-CURL-VIRUS; WHITEFLY-TRANSMITTED GEMINIVIRUSES; DISTINCT BIPARTITE GEMINIVIRUSES; YELLOW MOSAIC GEMINIVIRUS; CLONED DNA-COMPONENTS; NUCLEOTIDE-SEQUENCE; MOLECULAR CHARACTERIZATION; INFECTING TOMATO; CENTRAL-AMERICA; HOST-RANGE SO - Archives of Virology 2003 ;148(9):1697-1712 9226 UI - 6442 AU - Ramsey JM AU - Cruz-Celis A AU - Salgado L AU - Espinosa L AU - Ordonez R AU - Lopez R AU - Schofield CJ AD - INSP, Ctr Invest Sobre Enfermedades Infecc, Cuernavaca, Morelos, MexicoServ Salud Estado Morelos, Cuernavaca, Morelos, MexicoUniv London London Sch Hyg & Trop Med, London WC1E 7HT, EnglandRamsey, JM, INSP, Ctr Invest Sobre Enfermedades Infecc, Cuernavaca, Morelos, Mexico TI - Efficacy of pyrethroid insecticides against domestic and peridomestic populations of Triatoma pallidipennis and Triatoma barberi (Reduviidae : Triatominae) vectors of Chagas' disease in Mexico AB - A single village control trial for Triatoma pallidipennis and T barberi was conducted using three synthetic pyrethroids (bifenthrin, cyfluthrin, and deltamethrin), evaluated as residual treatments in separate sectors, with complete coverage indoors and in peridomiciliary areas. Spray intervention was preceded by a preintervention entomological evaluation and household survey, followed by four postintervention evaluations at 1, 3, 6, and 12 mo of > 96% of houses. Overall preintervention adjusted infestation index was 38%, 17% of which represented intradomicile infestation. Dose verification using high-performance liquid chromatography (HPLC) demonstrated correct spray doses for all but deltamethrin treatments. There was between a 6- and 13-fold decrease in intradomicile live bug infestation for cyfluthrin- and bifenthrin-treated areas, resulting at I mo in 0 and 0.6% infestation, respectively. Intradomicile infestation recovered somewhat, terminating at 20 and 50% of preintervention levels at 12 mo, respectively, while peridomicile infestation recovered preintervention levels within 3-6 mo. Households with persistent live peridomiciliary infestation had 1.9 times the risk of having a persistent intradomiciliary infestation, while 80% of peridomicile infestations for both triatomine species were in houses not having a previous infestation. New or reinfestation of households did not occur consistent with a sylvan source, and unconstructed lots were not a significant source of bugs. Houses with persistent peridomicile infestation did represent a significant risk for surrounding uninfested houses by cluster analysis (P < 0.05). Along with the increased prevalence of T cruzi infection after intervention, the data indicate that a sylvan reservoir source, probably peridomicile small rodent nests, represent the major risk factor for persistent and new infestations MH - United Kingdom MH - Mexico|Morelos PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000188185400025 L2 - Triatoma pallidipennis;Triatoma barberi;pyrethroid insecticides;domestic control;HOUSE INFESTATION; RISK-FACTORS; DIMIDIATA SO - Journal of Medical Entomology 2003 ;40(6):912-920 9227 UI - 7057 AU - Rana MS AU - Maity SK AU - Ancheyta J AU - Dhar GM AU - Rao TSRP AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIndian Inst Petr, Dehra Dun 245008, Uttranchal, IndiaRana, MS, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - TiO2-SiO2 supported hydrotreating catalysts: physico-chemical characterization and activities AB - Hydrotreating of model molecules over high specific surface area (SSA) Co(Ni)Mo/TiO2-SiO2 mixed oxide supported catalysts has been investigated in a micro-catalytic reactor at 400 degreesC and atmospheric pressure. Activity studies are carried out for thiophene hydrodesulfurization (HDS) and I-cyclohexene hydrogenation (HYD). The effect of support composition, molybdenum content (2-14 wt.% Mo) and promoters contents (1-5 wt.% Co or Ni) is examined. Supported catalysts are characterized by BET specific surface area, X-ray diffraction (XRD), pore volume, zero point charge (ZPC) and low temperature oxygen chemisorptions (LTOC). Sulfided catalysts showed wide range of activity variation with support composition which relishes that molybdenum sulfided active phases strongly depend on the nature and composition of support. LTOC and catalytic activity results showed similar trend with the effect of molybdenum variation indicating that the number of anion vacancies varies with variation of MoS2 phases. The highest activities were observed at 8 wt.% Mo loading and after that activity decreases with decreasing the anionic vacancies. The characterization results of XRD, ZPC and LTOC are well agreed about the Mo monolayer formation. Incorporation of TiO2 with SiO2 alters the nature of weak interaction of active phases with SiO2 support, and overcome it through poor dispersion on the support surface. Therefore, TiO2 counterpart plays a role to provide high intrinsic activity and generate favorable morphology Of MoS2 phases and metal support interaction. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000186388000014 L2 - CoMo;HDS;HYD;TiO2-SiO2;XRD and O-2 chemisorptions;SURFACE-AREA; MIXED-OXIDE; HYDRODESULFURIZATION; MOLYBDENA; TIO2 SO - Applied Catalysis A-General 2003 ;253(1):165-176 9228 UI - 9111 AU - randa-Gomez JJ AU - Luhr JF AU - Housh TB AU - Connor CB AU - Becker T AU - Henry CD AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76001, MexicoSmithsonian Inst, Dept Mineral Sci, Washington, DC 20560, USAUniv Texas, Dept Geol Sci, Austin, TX 78712, USAUniv S Florida, Dept Geol, Tampa, FL 33620, USABerkeley Geochronol Ctr, Berkeley, CA 94709, USAUniv Nevada, Nevada Bur Mines & Geol, Reno, NV 89557, USAAranda-Gomez, JJ, Univ Nacl Autonoma Mexico, Ctr Geociencias, Campus Juriquilla,POB 1-742, Queretaro 76001, Mexico TI - Synextensional Pliocene-Pleistocene eruptive activity in the Camargo volcanic field, Chihuahua, Mexico AB - The Camargo volcanic field is the largest mafic alkalic volcanic field in the Mexican Basin and Range province, and the relationship between volcanism and normal faulting is especially strong. The Camargo volcanic field lies in the northern part of the province, midway between the Sierra Madre Occidental and Trans-Pecos Texas. It is formed by Pliocene-Pleistocene (4.7-0.09 Ma) intraplate mafic alkalic volcanic rocks, some of which contain peridotite, pyroxenite, and granulite xenoliths. The volcanic field covers similar to3000 km(2) and has an estimated volume of similar to 120 km(3) erupted from >300 recognized vents. Twenty-six new Ar-40/Ar-39 age determinations for the Camargo volcanic field and its environs show that volcanic activity began in the southwest part of the field and shifted toward the northeast at similar to15 mm/yr. The average magmatic eruption rate during growth of the field was similar to0.026 km(3)/k.y. The Camargo volcanic field lies within an accommodation zone with west-dipping faults and east-tilted blocks to the north and east-dipping faults and west-tilted blocks to the south. These faults are expressed in the volcanic field by a N30degreesW-trending graben with scarps up to similar to100 m high through its central part. Volcanism and faulting were at least in part coeval, and younger volcanic products commonly drape fault scarps that cut earlier lavas. Normal faulting is bracketed between 4.7 and 2.1 Ma and may have also migrated northeastward. Estimated vertical slip rates on four Pliocene faults range from 0.03 mm/yr, a likely long-term rate, to 1.67 mm/ yr, interpreted as a short-term rate operative during periods of active faulting. Northwest-striking normal faults that cut alluvial-fan deposits and Pleistocene lavas in the northern Camargo volcanic field and geomorphic evidence for recent uplift to the south of the volcanic field suggest that the region is still extending MH - Mexico|Queretaro MH - USA PB - DENVER: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000181194700004 L2 - basin and range province;Chihuahua;Mexico;extension faults;intraplate;Pliocene;slip rates;WESTERN UNITED-STATES; NORTHERN MEXICO; SOUTHERN BASIN; LA-OLIVINA; CENOZOIC EXTENSION; TERTIARY VOLCANISM; ALKALI BASALTS; DURANGO-CITY; PETROLOGY; RANGE SO - Geological Society of America Bulletin 2003 ;115(3):298-313 9229 UI - 6894 AU - Rangel-Rojo R AU - Kimura K AU - Matsuda H AU - Mendez-Rojas MA AU - Watson WH AD - Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Ensenada 22860, Baja California, MexicoAIST, Mol Photon Grp, Photon Res Inst, Tsukuba, Ibaraki 3058565, JapanTexas Christian Univ, Dept Chem, Ft Worth, TX 76129, USARangel-Rojo, R, Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Apartado Postal 2732, Ensenada 22860, Baja California, Mexico TI - Dispersion of the third-order nonlinearity of a metallo-organic compound AB - We present a study of the third-order nonlinearity of a ferrocene derivative of a 2-amino-1,2,3-triazol-quinone system [2-(yliminomethylferrocenyl)naptho-1,2,3-triazole-4,9-dione] in solution. The z-scan technique with a tunable 10 ps laser source allowed the resolution of the absorptive and refractive contributions to the nonlinearity at several wavelengths near resonance. The nonlinear response is attributed to the metal-ligand charge transfer that gives rise to the absorption spectrum features. The absorptive contribution changes from saturable to two-photon absorption going away from resonance, vanishing at lambda = 560 nm, which is important for applications based on nonlinear refractive effects. The nonlinear refractive index n(2) remains positive and finite throughout the spectral range investigated. (C) 2003 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000186586300025 L2 - nonlinear optics;organics;nonlinear absorption;nonlinear refractive index;POLYDIACETYLENE MICROCRYSTALS; REFRACTIVE-INDEXES; OPTICAL-PROPERTIES SO - Optics Communications 2003 ;228(1-3):181-186 9230 UI - 6866 AU - Rappole JH AU - King DI AU - Rivera JHV AD - Smithsonian Conservat & Res Ctr, Front Royal, VA 22630, USAUniv Massachusetts, US Forest Serv, NE Expt Stn, Holdsworth Nat Resources Ctr 203, Amherst, MA 01003, USAUniv Nacl Autonoma Mexico, Estac Biol Chamela, Inst Biol, San Patricio 22630, Jalisco, MexicoRappole, JH, Smithsonian Conservat & Res Ctr, 1500 Remount Rd, Front Royal, VA 22630 USA TI - Coffee and conservation III: Reply to Philpott and Dietsch MH - Mexico|Jalisco MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 6 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Editorial Material AV - English IS - 0888-8892 UR - ISI:000186869700043 SO - Conservation Biology 2003 ;17(6):1847-1849 9231 UI - 9183 AU - Rappole JH AU - King DI AU - Rivera JHV AD - Smithsonian Conservat & Res Ctr, Front Royal, VA 22630, USAUniv Massachusetts, US Forest Serv, NE Expt Stn, Holdsworth Nat Resources Ctr 203, Amherst, MA 01003, USAUniv Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, San Patrico 22630, Jalisco, MexicoRappole, JH, Smithsonian Conservat & Res Ctr, 1500 Remount Rd, Front Royal, VA 22630 USA TI - Coffee and conservation MH - Mexico|Jalisco MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 20 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Editorial Material AV - English IS - 0888-8892 UR - ISI:000180846200040 L2 - SHADE; BIRDS SO - Conservation Biology 2003 ;17(1):334-336 9232 UI - 7759 AU - Raul RS AU - Dominguez JM AU - Ferid R AU - Alvarez TC AD - Inst Mexicano Petr, Programa Ingn Mol Competencia Catalisis, Mexico City 07730, DF, MexicoUniv Montpellier 2, GDPC, F-34095 Montpellier 05, FranceUNAM, Inst Quim, Circuito Exterior CU, Mexico City 04310, DF, MexicoRaul, RS, Inst Mexicano Petr, Programa Ingn Mol Competencia Catalisis, Eje Cent L Cardenas 152, Mexico City 07730, DF, Mexico TI - Synthesis of siliceous MCM-41 grafted with transition metal carbonyls AB - Grafted transition metal carbonyls over siliceous MCM-41 have been synthesized and further characterized by IR spectroscopy, showing bands in the range between 1800 cm(-1) and 2100 cm(-1), which are characteristic of metal carbonyls. Si-29 MAS NMR spectra indicate that the interaction of the metal complexes with the silica wall of MCM-41 provokes a modification of the relaxation time of the silanol surface groups. The XRD study confirmed the stability of the hexagonal structure of the parent MCM-41 after the grafting procedure. The Thermo-analytical characterization of the silica-grafted complexes indicates the complete removal of the carbonyl bonds in a single endothermic step, leaving an oxide residue MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000184568300078 SO - Nanotechnology in Mesostructured Materials 2003 ;146():331-334 9233 UI - 7792 AU - Ravelli A AU - Duarte-Salazar C AU - Buratti S AU - Reiff A AU - Bernstein B AU - Maldonado-Velazquez MR AU - Beristain-Manterola R AU - Maeno N AU - Takei S AU - Gerloni V AU - Spencer CH AU - Pratsidou-Gertsi P AU - Ruperto N AU - Pistorio A AU - Martini A AD - IRCCS G Gaslini, I-16147 Genoa, ItalyItalian Pediat Rheumatol Study Grp, Milan, ItalyHosp Gen & Infantil Mexico, Mexico City, DF, MexicoChildrens Hosp Los Angeles, Los Angeles, CA 90027, USAJapanese Pediat Rheumatol Assoc, Kagushima, JapanInst G Pini, Milan, ItalyLa Rabida Childrens Hosp & Res Ctr, Chicago, IL, USAAristotle Univ Thessaloniki, GR-54006 Thessaloniki, GreeceMartini, A, IRCCS G Gaslini, Pediatria 2,Largo G Gaslini 5, I-16147 Genoa, Italy TI - Assessment of damage in juvenile-onset systemic lupus erythematosus: A multicenter cohort study AB - Objective. To investigate the prevalence of cumulative organ damage in patients with juvenile-onset systemic lupus erythematosus (SLE) and its association with demographic and clinical variables, medication use, and quality of life. Methods. The occurrence of organ system damage, as measured by the Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI), was determined for 387 patients consecutively enrolled in pediatric rheumatology centers from Europe, the US, Mexico, and Japan. Risk factors for damage included demographic variables; clinical manifestations at diagnosis; previous corticosteroid, immunosuppressive, and antimalarial therapies; disease activity; and quality of life. Results. Overall, 195 (50.5%) patients had damage within a mean of 5.7 years after disease onset. Renal (21.8%) and neuropsychiatric (15.8%) system involvement were observed most frequently, followed by musculoskeletal (11.7%), ocular (10.9%) and skin (9.6%) system involvement, with a mean SDI score of 1.1. In multivariate models, the occurrence of neuropsychiatric manifestations at diagnosis, a longer disease duration, and a greater number of intravenous cyclophosphamide pulses showed the strongest association with the presence of damage. Conclusion. We found evidence of cumulative organ damage, as measured by the SDI, in half of the patients with juvenile-onset SLE. Damage was significantly more likely in patients who had experienced neuropsychiatric manifestations at diagnosis, had a longer disease duration, and had received more intravenous pulses of cyclophosphamide MH - Greece MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 37 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000184624300005 L2 - organ damage;systemic lupus erythematosus;systemic lupus erythematosus collaborating clinics/American College of Rheumatology Damage Index;ASSESSMENT QUESTIONNAIRE CHAQ; 1ST 2 DECADES; DISEASE-ACTIVITY; SOCIOECONOMIC-STATUS; RISK-FACTORS; ADULT-ONSET; CHILDHOOD; INDEX; ASSOCIATION; PROGNOSIS SO - Arthritis & Rheumatism-Arthritis Care & Research 2003 ;49(4):501-507 9234 UI - 6749 AU - Raxworthy CJ AU - Martinez-Meyer E AU - Horning N AU - Nussbaum RA AU - Schneider GE AU - Ortega-Huerta MA AU - Peterson AT AD - Amer Museum Nat Hist, New York, NY 10024, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Michigan, Museum Zool, Ann Arbor, MI 48109, USAUniv Kansas, Nat Hist Museum, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USARaxworthy, CJ, Amer Museum Nat Hist, Cent Pk W & 79th St, New York, NY 10024 USA TI - Predicting distributions of known and unknown reptile species in Madagascar AB - Despite the importance of tropical biodiversity(1), informative species distributional data are seldom available for biogeographical study or setting conservation priorities(2,3). Modelling ecological niche distributions of species offers a potential soluion(4-7); however, the utility of old locality data from museums, and of more recent remotely sensed satellite data, remains poorly explored, especially for rapidly changing tropical landscapes. Using 29 modern data sets of environmental land coverage and 621 chameleon occurrence localities from Madagascar ( historical and recent), here we demonstrate a significant ability of our niche models in predicting species distribution. At 11 recently inventoried sites, highest predictive success (85.1%) was obtained for models based only on modern occurrence data (74.7% and 82.8% predictive success, respectively, for pre-1978 and all data combined). Notably, these models also identified three intersecting areas of over-prediction that recently yielded seven chameleon species new to science. We conclude that ecological niche modelling using recent locality records and readily available environmental coverage data provides informative biogeographical data for poorly known tropical landscapes, and offers innovative potential for the discovery of unknown distributional areas and unknown species MH - USA MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 62 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000187342000058 L2 - CONSERVATION PRIORITIES; BIODIVERSITY HOTSPOTS; FUTURE; MODELS; TIME SO - Nature 2003 ;426(6968):837-841 9235 UI - 7646 AU - Raymond DJ AU - Raga GB AU - Bretherton CS AU - Molinari J AU - Lopez-Carrillo C AU - Fuchs Z AD - New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Washington, Seattle, WA 98195, USASUNY Albany, Albany, NY 12222, USARaymond, DJ, New Mexico Inst Min & Technol, Dept Phys, 801 Leroy Pl, Socorro, NM 87801 USA TI - Convective forcing in the intertropical convergence zone of the eastern Pacific AB - One of the goals of the East Pacific Investigation of Climate, year 2001 process study (EPIC2001), was to understand the mechanisms controlling the forcing of deep atmospheric convection over the tropical eastern Pacific. An intensive study was made of convection in a 4degrees x 4degrees square centered on 10degreesN, 95degreesW in September and October of 2001. This is called the intertropical convergence zone (ITCZ) study region because it encompasses the eastern Pacific intertropical convergence zone. Starting from an analysis of the theoretical possibilities and a plethora of dropsonde, in situ, radar, and satellite data, it is found that newly developing convection occurs where a deep layer of air ( of order 1 km deep or deeper) is conditionally unstable with only weak convective inhibition. Shallower conditionally unstable layers are associated with numerous small clouds, but do not seem to produce deep convection. The occurrence of deep convection over the ITCZ study region is presumably related to the propensity of the environment to produce areas of weak convective inhibition over such a deep layer. Three theoretically possible factors control the formation of such convectively unstable areas: 1) the strength of the total surface heat (or moist entropy) fluxes; 2) the advection of moisture into the region; and 3) temperature anomalies caused by dry adiabatic ascent of the inhibition layer, which lies typically between 700 and 850 mb. The areal fraction covered by such instability is small even on highly convective days. In the tropical eastern Pacific, it is found that the total surface entropy flux is the most significant of these factors, with a warm layer in the 700-850-mb range, resulting presumably from subsidence, playing an important suppressive role in certain cases. These two factors account for approximately two-thirds of the variance in satellite infrared brightness temperature averaged over the study region. Moisture (or moist entropy) advection appears to be of less importance. Tropical disturbances such as easterly waves, Kelvin waves, and the Madden-Julian oscillation presumably control convection primarily via these two mechanisms during their passage through this region MH - Mexico|Distrito Federal MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0022-4928 UR - ISI:000184841500002 L2 - ATMOSPHERIC BOUNDARY-LAYER; AIRBORNE DOPPLER RADAR; SEA INTERACTION THEORY; EQUATORIAL PACIFIC; TOGA COARE; WARM POOL; PRECIPITATING CONVECTION; TROPICAL CYCLONES; AIR; MODEL SO - Journal of the Atmospheric Sciences 2003 ;60(17):2064-2082 9236 UI - 9188 AU - Raymond JC AU - Ghavamian P AU - Sankrit R AU - Blair WP AU - Curiel S AD - Smithsonian Astrophys Observ, Cambridge, MA 02138, USARutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854, USAJohns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoRaymond, JC, Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA TI - Far-ultraviolet spectra of a nonradiative shock wave in the Cygnus Loop AB - Spatial and spectral profiles of O VI emission behind a shock wave on the northern edge of the Cygnus Loop were obtained with the Far Ultraviolet Spectroscopic Explorer. The velocity width of the narrowest O vi profile places a tight constraint on the electron-ion and ion-ion thermal equilibration in this 350 km s(-1) collisionless shock. Unlike faster shocks in SN 1006 and in the heliosphere, this shock brings oxygen ions and protons to within a factor of 2.5 of the same temperature. Comparison with other shocks suggests that shock speed, rather than Alfven Mach number, may control the degree of thermal equilibration. We combine the O vi observations with a low-resolution far-UV spectrum from the Hopkins Ultraviolet Telescope, an H image, and ROSAT PSPC X-ray data to constrain the preshock density and the structure along the line of sight. As part of this effort, we model the effects of resonance scattering of O vi photons within the shocked gas and compute time-dependent ionization models of the X-ray emissivity. Resonance scattering affects the O vi intensities at the factor of 2 level, and the soft spectrum of the X-ray rim can be mostly attributed to departures from ionization equilibrium. The preshock density is about twice the canonical value for the Cygnus Loop X-ray emitting shocks MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000180884100023 L2 - ISM : individual (Cygnus Loop);shock waves;supernova remnants;ultraviolet : ISM;SUPERNOVA REMNANT; X-RAY; INTERSTELLAR-MEDIUM; EMISSION-LINES; TELESCOPE; FILAMENT; SPECTROSCOPY; PERFORMANCE; CALIBRATION; MISSION SO - Astrophysical Journal 2003 ;584(2):770-781 9237 UI - 7031 AU - Raymond O AU - Font R AU - Suarez N AU - Portelles J AU - Siqueiros JM AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoUniv La Habana, Fac Fis, San Lazaro Y L 10400, CubaRaymond, O, UNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, Mexico TI - Effects of two kinds of FeNbO4 precursors in the obtainment and dielectric properties of PFN ceramics AB - We report here a study of the obtainment, structural and dielectric characterization of the monoclinic and orthorhombic phases of FeNbO4 precursors and their effects in the processing and the dielectric properties of Pb(Fe1/2Nb1/2)O-3 ceramics. Crystallographic and surface morphological studies were carried out by powder X-ray diffraction and scanning electron microscopy techniques. For structural determination, runs of Rietveld refinement were realized employing FULLPROF software. Measurements of electrical resistivity, dielectric constant and dielectric loss as functions of temperature were realized in PFN ceramics. An analysis and a comparative discussion of results are presented MH - Cuba MH - Mexico|Baja California PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000186527000016 L2 - precursors;iron niobate;structures;Rietveld refinements;dielectric properties;resistivity;ferroelectric;LEAD MAGNESIUM NIOBATE; ELECTROMECHANICAL PROPERTIES; SINTERING CONDITIONS; IRON NIOBATE; THIN-FILMS; PMN-PFN; MICROSTRUCTURE; COMPOSITES; RELAXORS SO - Ferroelectrics 2003 ;294():141-154 9238 UI - 7289 AU - Raymond O AU - Villavicencio H AU - Petranovskii V AU - Siqueiros JM AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoISP Enrique Jose Varona, Fac Ciencias, Havana, CubaRaymond, O, UNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, Mexico TI - Growth and characterization of ZnS and ZnCdS nanoclusters in mordenite zeolite host AB - The growth of semiconductor nanoclusters of ZnS and the ternary ZnCdS system embedded in synthetic mordenites by ionic exchange using different mixtures of CdCl2 and ZnCl2 as starting sources, followed by treatment in hydrogen sulphide flow, is reported. Compositional, morphological and structural studies were realized by XRD, SEM, TEM and energy dispersive spectroscopy (EDS). XRD shows well-crystallized mordenite and the absence of secondary phases; EDS gives us the chemical composition of the matrix host and the relative weight percent of Cd, Zn and S. TEM and SEM show the morphology, packing and sizes of mordenite crystals (bundled needles of 3 mum long and 0.07 mum width). Measurements of the absorption spectra by diffuse reflectance spectroscopy in the UV-visible range allow us an analysis of the optical behavior as a function of the relative concentration of Zn and Cd. Samples show blue shifts in the absorption edges when the Cd concentration decreases and correspondingly, the Zn concentration increases. The optical band gap is determined and its behavior with concentration changes is discussed. Previously, ZnCdS clusters supported on mordenite were prepared in our laboratory by hydrothermal growth. A comparative discussion of the results obtained through both synthetic processes is presented. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Baja California PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000185793500026 L2 - mordenite;semiconductor clusters;UV-visible absorption;band gap;CDS; NANOPARTICLES SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2003 ;360(1-2):202-206 9239 UI - 7554 AU - Razin SV AU - Farrell CM AU - Recillas-Targa F AD - Russian Acad Sci, Lab Struct & Funct Org Chromosomes, Inst Gene Biol, Moscow 117334, RussiaNIDDKD, Mol Biol Lab, NIH, Bethesda, MD 20892, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoRazin, SV, Russian Acad Sci, Lab Struct & Funct Org Chromosomes, Inst Gene Biol, Moscow 117334, Russia TI - Genomic domains and regulatory elements operating at the domain level MH - Mexico|Distrito Federal MH - Russia MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 15 U4 - Cell Biology U5 - S;Review AV - English IS - 0074-7696 UR - ISI:000185102600002 L2 - genomic domains;LCR;beta-globin genes;insulators;replication timing;BETA-GLOBIN LOCUS; ORIGIN RECOGNITION COMPLEX; RNA-POLYMERASE-II; DOMINANT CONTROL REGION; KRUPPEL-LIKE FACTOR; HYPERSENSITIVE SITE 2; DROSOPHILA HETEROCHROMATIN PROTEIN-1; PROPER DEVELOPMENTAL CONTROL; YEAST ARTIFICIAL CHROMOSOME; ENHANCER BLOCKING ACTIVITY SO - International Review of Cytology - A Survey of Cell Biology, Vol 226 2003 ;226():63-125 9240 UI - 7227 AU - Razo-Flores E AU - Iniestra-Gonzalez M AU - Field JA AU - Olguin-Lora P AU - Puig-Grajales L AD - Inst Mexicano Petr, Programa Biotecnol, Mexico City 07730, DF, MexicoUniv Arizona, Dept Chem & Environm Engn, Tucson, AZ 85721, USARazo-Flores, E, Inst Mexicano Petr, Programa Biotecnol, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Biodegradation of mixtures of phenolic compounds in an upward-flow anaerobic sludge blanket reactor AB - The anaerobic biodegradability of mixtures of phenolic compounds was studied under continuous and batch systems. Continuous experiments were carried out in up-flow anaerobic sludge bed (UASB) reactors degrading a mixture of phenol and p-cresol as the main carbon and energy sources. The total chemical oxygen demand (COD) removal above 90% was achieved even at organic loading rates as high as 7 kg COD/m(3)/day. Batch experiments were conducted with mixtures of phenolic compounds (phenol, p-cresol, and o-cresol) to determine the specific biodegradation rates using unadapted and adapted anaerobic granular sludge. Phenol and p-cresol were mineralized by adapted sludge with rates several orders of magnitude higher than unadapted sludge. Additionally, an UASB reactor was operated with the mixture phenol, p-cresol, and o-cresol. After 54 days of operation, 80% of o-cresol (supplied at 132 mg/L) was eliminated. The phenol biodegradation was not affected by the presence of o-cresol. These results demonstrate that major phenolic components in petrochemical effluents can be biodegraded simultaneously during anaerobic treatment MH - Mexico|Distrito Federal MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0733-9372 UR - ISI:000186006500005 L2 - anaerobic processes;biodegradation;phenol;methane;sludge;cisterns;wastewater treatment;WASTE-WATER; P-CRESOL; UASB REACTOR; METHANOGENIC DEGRADATION; INHIBITION-KINETICS; GRANULAR SLUDGE; CONSORTIUM; CARBOXYLATION; BATCH SO - Journal of Environmental Engineering-Asce 2003 ;129(11):999-1006 9241 UI - 8343 AU - rce-Ferrer AJ AU - Ketterer JJ AD - Autonomous Univ Yucatan, Coll Educ, Merida, Yucatan, MexicoJacksonville State Univ, Jacksonville, AL 36265, USAArce-Ferrer, AJ, Autonomous Univ Yucatan, Coll Educ, 41 St S-N X 14,POB 1207, Merida, Yucatan, Mexico TI - The effect of scale tailoring for cross-cultural application on scale reliability and construct validity AB - This article summarizes main findings from a two-step investigation about the effects of tailoring a scale with etic and emic items and extreme-response styles on the validity and reliability of scores. The Career Decision-Making Self-Efficacy scale was chosen. and its Spanish version was tailored with translated items, adapted items, and newly developed items. The tailored scale was administered to two independent samples of high school students from Mexico. Reliability estimates for the emic and etic scales were marginally different between them and with respect to those for the English language. Tailoring a scale with the best etic and emic items neither improved on the recovery of the five-dimension structure nor reduced the effects of the extreme response style variable MH - Mexico|Yucatan MH - USA PB - THOUSAND OAKS: SAGE PUBLICATIONS INC RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Educational;Mathematics, Interdisciplinary Applications;Psychology, Mathematical U5 - J;Article AV - English IS - 0013-1644 UR - ISI:000183086500009 L2 - validity;reliability;scale tailoring;extreme-response style;SELF-EFFICACY SCALE; EXTREME RESPONSE STYLE; PROCRUSTES ROTATION; TRANSLATIONS SO - Educational and Psychological Measurement 2003 ;63(3):484-501 9242 UI - 8742 AU - rciniega-Ceballos A AU - Chouet B AU - Dawson P AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoUS Geol Survey, Menlo Pk, CA 94025, USAArciniega-Ceballos, A, Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Long-period events and tremor at Popocatepetl volcano (1994-2000) and their broadband characteristics AB - Following an initial phreatic eruption on 21 December 1994, activity at Popocatepedtl has been dominated by fumarolic emissions interspersed with more energetic emissions of ashes and gases. A phase of repetitive dome-building and dome-destroying episodes began in March 1996 and is still ongoing at present. We describe the long-period (LP) seismicity accompanying eruptive activity at Popocateped from December 1994 through May WOO, using data from a three-component broadband seismometer located 5 km from the summit crater. The broadband records display a variety of signals, with periods ranging in the band 0.04-90 s. Long-period events and tremor with typical dominant periods in the range 0.3-2.0 s are the most characteristic signals observed at Popocatepetl. These signals appear to reflect volumetric sources driven by pressure fluctuations associated with the unsteady transport of gases beneath the crater. Very-long-period (VLP) signals are also observed in association with LP events and tremor. The VLP signals which accompany LP events display Ricker-like wavelets with periods near 36 s, whereas VLP signals associated with tremor waveforms typically show sustained oscillations at periods ranging up to 90 s. The spectra and particle motion patterns remain similar from event to event for the majority of LP and tremor signals analyzed during the time span of this study, suggesting a repeated, non-destructive activation of a common source. Hypocenters determined by phase pick analyses of selected LP events recorded by the seven-station, permanent Popocatepetl short-period network suggest that the majority of these events are confined to a source region in the top 1.5 km below the crater floor. The repetitive occurrences of VLP signals with closely matched waveform characteristics are consistent with a non-destructive reactivation of at least two sources. One source appears to coincide with the main source region of LP seismicity, whereas the second is a deeper source whose activity appears to be intimately linked with episodes of monochromatic tremor MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000182101600004 L2 - volcanic eruption;volcanic seismic signals;long-period events;tremor;very-long-period signals;Popocatepetl;BAND SEISMIC OBSERVATIONS; FLUID-DRIVEN CRACK; STROMBOLI-VOLCANO; REDOUBT-VOLCANO; ASO-VOLCANO; JAPAN; EXPLOSIONS; SIGNALS; MEXICO; ALASKA SO - Bulletin of Volcanology 2003 ;65(2-3):124-135 9243 UI - 9028 AU - Read DJ AU - Perez-Moreno J AD - Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandColegio Postgrad, Microbiol Edafol Irenat, Montecillo 56320, Texcoco, MexicoRead, DJ, Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England TI - Mycorrhizas and nutrient cycling in ecosystems - a journey towards relevance? AB - Progress towards understanding the extent to which mycorrhizal fungi are involved in the mobilization of nitrogen (N) and phosphorus (P) from natural substrates is reviewed here. While mycorrhiza research has emphasized the role of the symbiosis in facilitation of capture of these nutrients in ionic form, attention has shifted since the mid-1980s to analysing the mycorrhizal fungal abilities to release N and P from the detrital materials of microbial faunal and plant origins, which are the primary sources of these elements in terrestrial ecosystems. Ericoid, and some ectomycorrhizal fungi have the potential to be directly involved in attack both on structural polymers, which may render nutrients inaccessible, and in mobilization of N and P from the organic polymers in which they are sequestered. The advantages to the plant of achieving intervention in the microbial mobilization-immobilization cycles are stressed. While the new approaches may initially lack the precision achieved in studies of readily characterized ionic forms of N and P, they do provide insights of greater ecological relevance. The results support the hypothesis that selection has favoured ericoid and ectomycorrhizal systems with well developed saprotrophic capabilities in those ecosystems characterized by retention of N and P as organic complexes in the soil. The need for further investigation of the abilities of arbuscular mycorrhizal fungi to intervene in nutrient mobilization processes is stressed MH - United Kingdom MH - Mexico|Estado De Mexico PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 133 U4 - Plant Sciences U5 - J;Review AV - English IS - 0028-646X UR - ISI:000181333500007 L2 - ericoid mycorrhiza;ectomycorrhiza;arbuscular mycorrhiza;nitrogen nutrition;phosphorus nutrition;ecosystem;FUNGUS HYMENOSCYPHUS-ERICAE; PAXILLUS-INVOLUTUS MYCORRHIZOSPHERES; EXTRACELLULAR ENZYME-ACTIVITIES; BEECH LEAF-LITTER; SUB-ARCTIC PLANTS; ECTOMYCORRHIZAL FUNGI; ORGANIC NITROGEN; AXENIC CULTURE; BOREAL FORESTS; VEGETATIVE MYCELIUM SO - New Phytologist 2003 ;157(3):475-492 9244 UI - 7767 AU - Redon R AU - Torrens H AU - Hahn FE AU - Lugger T AU - Hernandez-Ortega S AU - Toscano RA AU - Morales-Morales D AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrado, Mexico City 04510, DF, MexicoUniv Munster, Inst Anorgan Chem, D-48149 Munster, GermanyMorales-Morales, D, Univ Nacl Autonoma Mexico, Inst Quim, Cd Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - X-ray structural and dynamic behaviour study of allyl palladium compounds with fluorinated benzenethiolate bridges AB - In solution, allyl palladium homobimetallic complexes bridged by fluorinated benzenethiolates, [{Pd(mu-SR)(eta(3)-C3H5)}(2)] where R = C6F5, 1; C6HF4-4, 2; C6H4F-2, 3; C6H4F-3, 4 and C6H4F-4, 5, are found as a mixture of syn/anti and cis/trans isomers. The variable temperature H-1 and F-19 NMR study of these compounds show that the four isomers undergo interconversion through two probable mechanisms, allyl rotation assisted by the solvent and inversion of the configuration at the sulphur atoms. The X-ray crystal structure determination of [{Pd(mu-SC6F5)(eta(3)-C3H5)}(2)] and [{Pd(mu-S C6HF4-4)(eta(3)-C3H5)}(2)] shown both complexes to be bimetallic with the metal centres found in a slightly distorted square planar environments. (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000184607400010 L2 - palladium;fluorothiolate;allyl;NMR spectroscopy;fluxionality;crystal structure;NONRIGID ORGANOMETALLIC COMPOUNDS; SULFUR INVERSION; MOLECULAR-STRUCTURE; NONDESTRUCTIVE METHOD; CRYSTAL-STRUCTURE; CHLORIDE DIMER; COMPLEXES; NMR; LIGANDS; DERIVATIVES SO - Journal of Molecular Structure 2003 ;655(3):423-433 9245 UI - 8911 AU - Redon S AU - Bombard S AU - Elizondo-Riojas MA AU - Chottard JC AD - Univ Paris 05, Lab Chim & Biochim Pharmacol & Toxicol, UMR 8601, F-75270 Paris 06, FranceUniv Autonoma Nuevo Leon, Ctr Univ Contra Canc, Hosp Univ Dr Jose Eleuterio Gonzalez, Monterrey, NL, MexicoBombard, S, Univ Paris 05, Lab Chim & Biochim Pharmacol & Toxicol, UMR 8601, 45 Rue St Peres, F-75270 Paris 06, France TI - Platinum cross-linking of adenines and guanines on the quadruplex structures of the AG(3)(T(2)AG(3))(3) and (T(2)AG(3))(4) human telomere sequences in Na+ and K+ solutions AB - The quadruplex structures of the human telomere sequences AG(3)(T(2)AG(3))(3) I and (T(2)AG(3))(4) II were investigated in the presence of Na+ and K+ ions, through the cross-linking of adenines and guanines by the cis- and trans-[Pt(NH3)(2)(H2O)(2)](NO3)(2) complexes 1 and 2. The bases involved in chelation of the cis- and trans-Pt(NH3)(2) moieties were identified by chemical and 3'-exonuclease digestions of the products isolated after denaturing gel electrophoresis. These are the four adenines of each sequence and four out of the 12 guanines. Two largely different structures have been reported for I: A from NMR data in Na+ solution and B from X-ray data of a K+-containing crystal. Structure A alone agrees with our conclusions about the formation of the A1-G10, A13-G22, A1-A13 platinum chelates at the top of the quadruplex and A7-A19, G4-A19 and A7-G20 at the bottom, whether the Na+ or K+ ion is present. At variance with a recent proposal that structures A and B could be the major species in Na+ and K+ solutions, respectively, our results suggest that structure A exists predominantly in the presence of both ions. They also suggest that covalent platinum cross-linking of a human telomere sequence could be used to inhibit telomerase MH - France MH - Mexico|Nuevo Leon PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 28 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000181546900011 L2 - CRYSTAL-STRUCTURE; DNA; INHIBITORS; CISPLATIN; CELLS; DEGRADATION; DERIVATIVES; MECHANISM; LIGANDS; SITE SO - Nucleic Acids Research 2003 ;31(6):1605-1613 9246 UI - 7261 AU - Reif JC AU - Melchinger AE AU - Xia XC AU - Warburton ML AU - Hoisington DA AU - Vasal SK AU - Beck D AU - Bohn M AU - Frisch M AD - Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyCIMMYT, Int Wheat & Maize Improvement Ctr, Mexico City 06600, DF, MexicoChina Agr Univ, Natl Maize Improvement Ctr China, Beijing 100094, Peoples R ChinaUniv Illinois, Dept Crop Sci, Urbana, IL 61801, USAMelchinger, AE, Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany TI - Use of SSRs for establishing heterotic groups in subtropical maize AB - Heterotic groups and patterns are of fundamental importance in hybrid breeding. The objectives of our research were to: (1) investigate the relationship of simple sequence repeats (SSR) based genetic distances between populations and panmictic midparent heterosis (PMPH) in a broad range of CIMMYT maize germplasm, (2) evaluate the usefulness of SSR markers for defining heterotic groups and patterns in subtropical germplasm, and (3) examine applications of SSR markers for broadening heterotic groups by systematic introgression of other germplasm. Published data of two diallels and one factorial evaluated for grain yield were re-analyzed to calculate the PMPH in population hybrids. Additionally, 20 pools and populations widely used in CIMMYT's breeding program were assayed with 83 SSR markers covering the entire maize genome. Correlations of squared modified Roger's distance (MRD2) and PMPH were mostly positive and significant, but adaption problems caused deviations in some cases. For intermediate- and early-maturity subtropical germplasm, two heterotic groups could be suggested consisting of a flint and dent composite. We concluded that the relationships between the populations obtained by SSR analyses are in excellent agreement with pedigree information. SSR markers are a valuable complementation to field trials for identifying heterotic groups and can be used to introgress exotic germplasm systematically MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000185117600022 L2 - heterotic groups;SSRs;heterosis;mega-environment;genetic distance;FRAGMENT-LENGTH-POLYMORPHISMS; COMBINING ABILITY; GENETIC DIVERSITY; MARKER LOCI; GERMPLASM; INBREDS; HETEROZYGOSITY; POPULATIONS; RFLPS SO - Theoretical and Applied Genetics 2003 ;107(5):947-957 9247 UI - 8134 AU - Reif JC AU - Melchinger AE AU - Xia XC AU - Warburton ML AU - Hoisington DA AU - Vasal SK AU - Srinivasan G AU - Bohn M AU - Frisch M AD - Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoMelchinger, AE, Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany TI - Genetic distance based on simple sequence repeats and heterosis in tropical maize populations AB - Heterotic groups and patterns are of fundamental importance in hybrid breeding of maize (Zea mays L.). The major goal of this study was to investigate the relationship between heterosis and genetic distance determined with simple sequence repeat (SSR) markers. The objectives of our research were to (i) compare the genetic diversity within and between seven tropical maize populations, (ii) test alternative hypotheses on the relationship between panmictic midparent heterosis (PMPH) and genetic distances determined with SSR markers, and (iii) evaluate the use of SSR markers for grouping of germplasm and establishing heterotic patterns in hybrid breeding of tropical maize. Published data of a diallel of seven tropical maize populations evaluated for agronomic traits in seven environments were reanalyzed to calculate PMPH in population hybrids. In addition, 48 individuals from each population were sampled and assayed with 85 SSR markers covering the entire maize genome. A total of 532 alleles in the 7 X 48 genotypes assayed were detected. The analysis of molecular variance (AMOVA) revealed that 89.8% of the variation was found within populations and only 10.2% between populations. The correlation between PMPH and the squared modified Roger's distance (MRD) based on SSR markers was significantly positive (P < 0.05) only for grain yield (r = 0.63). With SSR analyses, it was possible to assign Population 29 (Pop29) to the established Heterotic Group A and propose new heterotic groups (Pop25, Pop43). We conclude that SSR markers provide a powerful tool for grouping of germplasm and are a valuable complementation to field trials for identifying groups with satisfactory heterotic response MH - Germany MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 26 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000183762800005 L2 - ZEA-MAYS L; COMBINING ABILITY; MOLECULAR MARKERS; INBRED LINES; GERMPLASM; LOCI; DIVERSITY; IDENTIFICATION; UTILITY; HYBRID SO - Crop Science 2003 ;43(4):1275-1282 9248 UI - 8349 AU - Reigada R AU - Sarmiento A AU - Lindenberg K AD - Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Matemat, Chamilpa 62200, Morelos, MexicoUniv Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAReigada, R, Univ Barcelona, Dept Quim Fis, Avda Diagonal 647, E-08028 Barcelona, Spain TI - Breathers and thermal relaxation in Fermi-Pasta-Ulam arrays AB - Breather stability and longevity in thermally relaxing nonlinear arrays depend sensitively on their interactions with other excitations. We review numerical results for the relaxation of breathers in Fermi-Pasta-Ulam arrays, with a specific focus on the different relaxation channels and their dependence on the interparticle interactions, dimensionality, initial condition, and system parameters. (C) 2003 American Institute of Physics MH - Mexico|Morelos MH - Spain MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000183156700025 L2 - INTRINSIC LOCALIZED MODES; ONE-DIMENSIONAL LATTICES; ANHARMONIC LATTICES; ENERGY LOCALIZATION; NONLINEAR LATTICES; MODULATIONAL INSTABILITY; DISCRETE BREATHERS; VIBRATIONAL-MODES; CHAIN; EXISTENCE SO - Chaos 2003 ;13(2):646-656 9249 UI - 7366 AU - Reipurth B AU - Raga A AU - Heathcote S AD - Univ Hawaii, Inst Astron, Honolulu, HI 96822, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSo Astrophys Res Telescope, La Serena, ChileReipurth, B, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA TI - Fragmentation of globules in HII regions: Hubble Space Telescope images of Thackeray's globules AB - We present Hubble Space Telescope WFPC2 images through an Halpha filter of Thackeray's globules in the southern H II region IC 2944. The images document the state of the globule complex during its current highly dynamical phase of breakup. A population of very small and short-lived splinters suggests that continuous fragmentation must play an important role in increasing the surface-to-mass ratio of the neutral gas, thus accelerating the processes of photoevaporation and photoablation. We are not able to single out which of various theoretical mechanisms for breakup is operating in the globule complex MH - USA MH - Chile MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000185676200022 L2 - dust, extinction;HII regions;ISM : clouds;ISM : globules;ISM : kinematics and dynamics;INTERSTELLAR CLOUDS; IONIZATION FRONTS; COMETARY GLOBULES; PLANETARY-NEBULAE; PHOTOEVAPORATION; RADIATION; STABILITY; EVOLUTION; CLUMPS; INSTABILITIES SO - Astronomical Journal 2003 ;126(4):1925-1932 9250 UI - 7789 AU - Reipurth B AU - Armond T AU - Raga A AU - Bally J AD - Univ Hawaii, Inst Astron, Honolulu, HI 96822, USAUniv Fed Minas Gerais, Dept Fis, ICEx, BR-30123970 Belo Horizonte, MG, BrazilUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USAReipurth, B, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA TI - Blowout from IC1396N: The emergence of Herbig-Haro flows from a cloud core AB - We have identified a major Herbig-Haro flow, HH 777, that is bursting out of the IC 1396N cometary cloud core. Near- and mid-infrared images reveal a very red object embedded in the center of the core, located on the symmetry axis of the large HH 777 flow, suggesting that this is likely the driving source. The projected separation of the working surface from the source is 0.6 pc. Additionally, 0.4 pc to the east of the source and on the flow axis, there is a faint, previously known HH object (HH 594) that may be part of the counterflow. It thus appears that we are seeing a blowout of a parsec-scale flow into the surrounding H II region. We study numerical simulations of a jet breaking out of a neutral cloud into a photoionized medium, and we reproduce the main features of the HH 777 flow MH - USA MH - Brazil MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000184585900012 L2 - ISM : clouds;ISM : Herbig-Haro objects;ISM : jets and outflows;stars : formation;stars : pre-main-sequence;RIMMED GLOBULE IC1396N; EXCITING SOURCE; JETS; OUTFLOWS; OBJECTS SO - Astrophysical Journal 2003 ;593(1):L47-L50 9251 UI - 2126 AU - Relano M AU - Beckman JE AU - Rozas M AD - Inst Astrofis Canarias, Tenerife 38200, SpainUNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoRelano, M, Inst Astrofis Canarias, C Via Lactea S-N, Tenerife 38200, Spain TI - High velocity gas outflows from HII regions in disc galaxies AB - We analyze the Ha emission line profiles of the H II region populations in three disc spiral galaxies and find evidence of wing features at 40-90 km s(-1) from the central peak in a significant fraction of regions. We explain the wing features as due to a shell expanding inside the H II region, quantify the energy involved and present two possible mechanisms to drive the expanding shell MH - Mexico|Baja California MH - Spain PB - BEIJING: SCIENCE PRESS RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1009-9271 UR - ISI:000229374500019 L2 - HII regions;ISM : jets and outflows;stars : mass loss;IONIZED-GAS SO - Chinese Journal of Astronomy and Astrophysics 2003 ;3():181-185 9252 UI - 8927 AU - Rendon-Maldonado J AU - Espinosa-Cantellano M AU - Soler C AU - Torres JV AU - Martinez-Palomo A AD - IPN, Dept Expt Pathol, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, MexicoUNAM, Res Unit Human Retroviruses, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Calif Davis, Sch Med, Dept Med Microbiol & Immunol, Davis, CA 95616, USAMartinez-Palomo, A, IPN, Dept Expt Pathol, Ctr Invest & Estudios Avanzados, Av I P N 2508, Mexico City 07360, DF, Mexico TI - Trichomonas vaginalis: In vitro attachment and internalization of HIV-1 and HIV-1-infected lymphocytes AB - Sexually transmitted diseases (STDs) caused by bacteria and protozoa play an important role in the epidemiology of human immunodeficiency virus (HIV-1) infection. Human trichomoniasis, produced by the protozoan parasite Trichomonas vaginalis, is one of the most common STDs, and is a cause of mucosal lesions in the urogenital tract, which may increase the risk for HIV infection. However, there a re no reports concerning the outcome of in vitro interactions between HIV particles and trichomonads. Therefore, we incubated T vaginalis with three subtypes of HIV-1 (A, B, and D), as well as with HIV-1-infected lymphocytes, and analyzed the interactions with immunofluorescence microscopy and transmission electron microscopy. Our results demonstrated that HIV-1 particles attach and are incorporated into T vaginalis through endocytic vesicles and are degraded within cytoplasmic vacuoles in approximately 48 h. There was no ultrastructural evidence of HIV-1 replication in trichomonads. These results demonstrated that trichomonads may internalize and harbor HIV-1 particles for short periods of time. In addition, under in vitro conditions, T. vaginalis ingests and digests HIV-1-infected lymphocytes MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: SOC PROTOZOOLOGISTS RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 1066-5234 UR - ISI:000181600500006 L2 - HIV infection;immunofluorescence;protozoan infections;sexually transmitted diseases;transmission electron microscopy;trichomoniasis;HUMAN-IMMUNODEFICIENCY-VIRUS; SEXUALLY-TRANSMITTED DISEASES; GENITAL-TRACT; RISK-FACTORS; CELL LINES; INFECTION; TRANSMISSION; PREVENTION; PHAGOCYTOSIS; INVITRO SO - Journal of Eukaryotic Microbiology 2003 ;50(1):43-48 9253 UI - 7676 AU - Renella G AU - Ortigoza ALR AU - Landi L AU - Nannipieri P AD - Univ Florence, Dept Soil Sci & Plant Nutr, I-50144 Florence, ItalyUniv Nacl Autonoma Mexico, Lab Edafol, Fac Ciencias, Mexico City 04510, DF, MexicoRenella, G, Univ Florence, Dept Soil Sci & Plant Nutr, Piazzale Cascine 28, I-50144 Florence, Italy TI - Additive effects of copper and zinc on cadmium toxicity on phosphatase activities and ATP content of soil as estimated by the ecological dose (ED50) AB - The ecological dose (ED50) of Cd on alkaline and acid phosphatase activity and the ATP content of three contrasting forest soils was measured with or without Cu and Zn to assess the additive toxic effects of these two metals. Soils polluted with Cu and/or Zn were treated with increasing Cd concentrations to give the following metal combinations: Cd, Cd + Cu, Cd + Zn and Cd + Cu + Zn. Alkaline and acid phosphatase activities and ATP content of the three soils were analysed 4 h, 7 and 28 days after the metal additions. The ED50 values were obtained by interpolating the enzyme activities or ATP data with a kinetic model and the goodness of fit was satisfactory. Generally, the ED50 values of both acid and alkaline phosphatase activities for Cd were lower (higher toxicity) with than without Cu and Zn and the effect of Cu and Zn was particularly adverse when these two metals were both added to soils. The alkaline phosphatase was more sensitive in the acid and neutral soil whereas the acid phosphatase was more sensitive in the alkaline soil. Both phosphatase activities and the ATP content were more sensitive in the sandy than in the finer textured soils. The ATP content was less sensitive to the additive effects. Increasing toxicity was observed during the incubation. Analysis of 1 M NH4NO3-extractable Cd, Cu and Zn revealed that Cd competed with Zn for the adsorption sites but not with Cu. However, the lower ED50 values for Cd of the two phosphatase activities and of the ATP content in the presence of heavy metal combinations could be not explained by the heavy metal solubility data. It is concluded that the ED50 may be a sensitive tool for assessing additve toxic effects to soil biochemical parameters. (C) 2003 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Soil Science U5 - J;Article AV - English IS - 0038-0717 UR - ISI:000184666300006 L2 - soil phosphatase activity;heavy metals;ecological dose;additive effects;RESPONSE MODEL APPROACH; SIMPLE KINETIC APPROACH; HEAVY-METALS; SHORT-TERM; BIOLOGICAL PROPERTIES; ALKALINE-PHOSPHATASE; ACID-PHOSPHATASE; ENZYME-ACTIVITY; TRACE-ELEMENTS; UREASE SO - Soil Biology & Biochemistry 2003 ;35(9):1203-1210 9254 UI - 7442 AU - Resendiz MMO AU - Lopez ACD AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Museum Zool, Iztapalapa 09230, DF, MexicoInst Ecol AC, Dept Entomol, Skopje 91000, MacedoniaResendiz, MMO, Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Museum Zool, Av Guelatao 66, Iztapalapa 09230, DF, Mexico TI - New Mexican state record for Golofa incas hope (Coleoptera : scarabaeidae, dynastinae) MH - Macedonia MH - Mexico|Distrito Federal PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Editorial Material AV - English IS - 0010-065X UR - ISI:000185408300008 SO - Coleopterists Bulletin 2003 ;57(3):296-296 9255 UI - 7910 AU - Reyes-Arellano A AU - Vega-Ramirez L AU - Najera-Mundo JA AU - Salgado-Zamora H AU - Molins E AU - Peralta-Cruz J AU - Tamariz J AD - IPN, Escuela Nacl Ciencias Biol, Dept Quim Organ, Mexico City 11340, DF, MexicoCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainReyes-Arellano, A, IPN, Escuela Nacl Ciencias Biol, Dept Quim Organ, Carpio & Plan Ayala S-N,Colonia Santo Tomas, Mexico City 11340, DF, Mexico TI - An abnormal C-H center dot center dot center dot O bond directs intermolecular bonding arrangements in bisimines AB - N,N-bis(3-nitrobenzylidene)ethylenediamine (1) formed a supramolecule with meso-hydrobenzoin, whereas N,N-bis(4nitrobenzyhdene)ethylenediamine (2) underwent a self-assembling process. The X-ray diffraction analysis showed that (CHO)-O-... intermolecular contacts play an important role in the building of both structures. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000184198100015 L2 - bisimines;C-H center dot center dot center dot O bonds;nitro group;self-assembly;supramolecules;H...O HYDROGEN-BOND; MOLECULAR RECOGNITION; HYDROQUINONE; CHEMISTRY SO - Journal of Molecular Structure 2003 ;655(1):141-148 9256 UI - 9409 AU - Reyes-Bonilla H AU - Herrero-Perezrul MD AD - Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149, USAInst Politecn Nacl, Ctr Indterdisciplinario Ciencias Marinas, La Paz 23000, Baja California, MexicoReyes-Bonilla, H, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Population parameters of an exploited population of Isostichopus fuscus (Holothuroidea) in the southern Gulf of California, Mexico AB - This study presents data on size structure, growth, natural and fishing mortality rates, probability of capture and seasonal recruitment to the fishery of an exploited stock of the holothurian Isostichopus fuscus from San Gabriel Bay, southern Gulf of California, Mexico, sampled in 1992-1993 (259 specimens), and analyzed with size frequency methods. Mean +/- S.E. length and weight (19.27 +/- 0.29 cm; 338.17 +/- 9.31 g) indicated that individuals from the population were smaller than those from the northern Gulf of California, but larger than in populations of southern Mexico or the Galapagos Islands. The slope of the length-weight relationship (b = 1.36) indicated that L fuscus grew alometrically. The Bertalanffy equation for length at age was: length at time t (years) = 29.108 [1 - (exp((-0.243(t-0.036))))]. Individuals smaller than 6.08 cm were younger than I year old and the largest reached 9 years or more. Population mean and modal age, and age for maturity were 5 years. Estimated natural mortality (M; median value obtained from figures generated by six different methods) was 0.354, and median fishing mortality (F) was 0.346, adding to a total mortality rate (Z) of 0.70. The curve of probability of capture showed that 50% of the population reaching 21.18 cm (5 years old) was susceptible for exploitation, and that most individuals larger than 23 cm (6 years old) were included in the fishery. The recruitment to the exploited stock was higher in fall and lower in winter and spring. We recommend the use of size frequency methods to provide basic information, urgently needed for management of holothurians worldwide. (C) 2002 Elsevier Science B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000180425500008 L2 - Isostichopus fuscus;holothurians;growth;mortality;size structure;Gulf of California;Mexico;ECHINODERMATA; FISHERY; GROWTH SO - Fisheries Research 2003 ;59(3):423-430 9257 UI - 8504 AU - Reyes-Esqueda JA AU - Vabre L AU - Lecaque R AU - Ramaz F AU - Forget BC AU - Dubois A AU - Briat B AU - Boccara C AU - Roger G AU - Canva M AU - Levy Y AU - Chaput F AU - Boilot JP AD - Univ Paris 11, Ecole Super Opt,CNRS,UMR 8501, Inst Opt Theor & Appl,Lab Charles Fabry, Grp Opt Nonlineare, F-91403 Orsay, FranceEcole Super Phys & Chim Ind Ville Paris, UPMC, CNRS,UPR A0005, Lab Opt Phys, F-75005 Paris, FranceEcole Polytech, CNRS,UMR 7643, Phys Mat Lab, Grp Chim Solide, F-91128 Palaiseau, FranceReyes-Esqueda, JA, Univ Nacl Autonoma Mexico, Inst Fis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Optical 3D-storage in sol-gel materials with a reading by optical coherence tomography-technique AB - We report on the recording of 3D optical memories in sol-gel materials by using a non-linear absorption effect. This effect induces a local change in optical properties of the material which is read and quantified with a high-resolution full-field optical coherence tomography setup. It is the first time that this technique is used for this purpose. Data recording was performed by focused picosecond (ps) single-pulse irradiation at 1064 nm with energy densities of 10 and 33 J/cm(2) per pulse. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000182753300008 L2 - non-linear materials;sol-gel;optical coherence tomography;optical data storage;non-linear absorption;two photon absorption;DATA-STORAGE; 2-PHOTON ABSORPTION; TRANSPARENT MATERIALS; FEMTOSECOND LASER; MEMORY; POLYMER; SILICA; FLUORESCENCE; MICROSCOPY; READOUT SO - Optics Communications 2003 ;220(1-3):59-66 9258 UI - 9963 AU - Reyes-Esqueda JA AU - Franco A AU - Bizarro M AU - Garcia-Macedo J AU - Canva M AU - Darracq B AU - Levy Y AU - Lahlil K AU - Chaput F AU - Boilot JP AD - Univ Nacl Autonoma Mexico, Inst Fis, Dept Estado Solido, Mexico City 04510, DF, MexicoUniv Paris 11, Lab Charles Fabry, Inst Opt, CNRS,UMR 8501, F-91403 Orsay, FranceEcole Polytech, CNRS, Lab Phys Mat Condensee, UMR 7643, F-91128 Palaiseau, FranceReyes-Esqueda, JA, Univ Nacl Autonoma Mexico, Inst Fis, Dept Estado Solido, Del Coyoacan, Mexico City 04510, DF, Mexico TI - Surface conductivity of DR1-functionalized organic-inorganic sol-gel materials AB - In recent years, in looking for an important photorefractive application, several studies on electro-optic and photoconductive sol-gel responses have been done. A very important effort has been addressed to establish the appropriate induced-orientation procedure, in order to get the highest electro-optic coefficient. In this way a very high coefficient of 48 pm/V at 831 nm in sol-gel has been already found. Similarly, the importance of the non-linear chromophore concentration into the material electro-optic behavior has been studied. However, the influence of the orientation procedure and the chromophore concentration over the photoconductive response has not been performed. In this work we study the vacuum-surface-charge-transport under and without illumination after poling times of 10, 30 and 120 min on DR1-functionalized sol-gel thin films of 1.3 mum in thickness with a suitable concentration of DR1. We include the measures before poling for other chromophore concentrations. We found the largest density of photocurrent at 633 nm for a poling time of 30 min. We also measured the order parameter in order to follow the Corona induced orientation evolution as function of time for each case. The saturation found into this parameter and into the photoconduction show the existence of an optimal poling time MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0928-0707 UR - ISI:000178789100186 L2 - sol-gel;photorefractive;photoconduction;electro-optic;chromophore concentration;molecular orientation;CHROMOPHORE ELECTROSTATIC INTERACTIONS; POLYMER; FILMS; PHOTOREFRACTIVITY SO - Journal of Sol-Gel Science and Technology 2003 ;26(1-3):1011-1016 9259 UI - 7423 AU - Reyes-Haro D AU - Garcia-Alcocer G AU - Miledi R AU - Garcia-Colunga J AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Juriquilla 76001, Queretaro, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Lab Cellular & Mol Neurobiol, Irvine, CA 92717, USAGarcia-Colunga, J, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Juriquilla 76001, Queretaro, Mexico TI - Uptake of serotonin by adult rat corpus callosum is partially reduced by common antidepressants AB - The corpus callosum (CC) is the main white matter tract involved in interhemispheric brain communication. We establish that uptake of [H-3]5-hydroxytryptamine (5-HT) in CC is partially inhibited by some antidepressants. Slices of the adult rat CC had a high-affinity uptake of 5-HT. About 80% of this uptake was Na+ dependent, with a Michaelis-Menten constant, K-m, of 420 +/- 80 nM and a rate of 5-HT uptake, V-max, of 9.5 +/- 0.8 pmol/mg protein/min. The 5-HT uptake was reduced similar to60% at pH 5 compared with that at pH 7. Fluoxetine (Prozac) inhibited only 43% of 5-HT uptake in a concentration-dependent manner, with an affinity constant, K-i, of 44.7 +/- 10.0 nM. We also studied the effects of other monoamine uptake inhibitors, all at 10 muM, and found that zimelidine, imipramine, and clomipramine inhibited 5-HT uptake in the CC by similar to30-40%. The fluoxetine-insensitive 5-HT uptake was not altered by high concentrations of dopamine plus norepinephrine. The present data show that Na+-dependent 5-HT uptake occurs in the CC and optic nerve and that this uptake is partially sensitive to antidepressants and probably mediated by the serotonin transporter, which may be relevant during depression. (C) 2003 Wiley-Liss, Inc MH - Mexico|Queretaro MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Neurosciences U5 - J;Article AV - English IS - 0360-4012 UR - ISI:000185521700011 L2 - serotonin transporter;inhibitors of monoamine uptake;antidepressants;white matter;MESSENGER-RNA; GLIAL-CELLS; NOREPINEPHRINE-TRANSPORTER; ALLELIC VARIATION; BRAIN; 5-HYDROXYTRYPTAMINE; SYNAPTOSOMES; EXPRESSION; INHIBITOR; RECEPTORS SO - Journal of Neuroscience Research 2003 ;74(1):97-102 9260 UI - 6801 AU - Reyes-Izquierdo T AU - Adang M AU - varez-Manilla G AU - Pierce JM AD - Ctr Invest Alimentacion y Desarrollo, Hermosillo, Sonora, MexicoUniv Georgia, Complex Carbohydrate Res Ctr, Athens, GA 30602, USAUniv Georgia, Dept Entomol, Athens, GA 30602, USA TI - Characterization of the glycans from the aminopeptidase N1 (APN1) receptor of the Bacillus thuringensis toxin Cry1Ac MH - Mexico|Sonora MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 0959-6658 UR - ISI:000186138200273 SO - Glycobiology 2003 ;13(11):898-898 9261 UI - 9148 AU - Reyes-Lopez M AU - Mendez-Tenorio A AU - Maldonaldo-Rodriguez R AU - Doktycz MJ AU - Fleming JT AU - Beattie KL AD - IPN, Lab Tecnol DNA, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoOak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831, USAUniv Tennessee, Ctr Environm Biotechnol, Knoxville, TN 37996, USAMaldonaldo-Rodriguez, R, IPN, Lab Tecnol DNA, Escuela Nacl Ciencias Biol, Prol Carpio & Plan Ayala S-N, Mexico City 11340, DF, Mexico TI - Fingerprinting of prokaryotic 16S rRNA genes using oligodeoxyribonucleotide microarrays and virtual hybridization AB - An oligonucleotide microarray hybridization system to differentiate microbial species was designed and tested. Seven microbial species were studied, including one Bacillus and six Pseudomonas strains. DNA sequences near the 5' end of 16S rRNA genes were aligned and two contiguous regions of high variability, flanked by highly conserved sequences, were found. The conserved sequences were used to design PCR primers which efficiently amplified these polymorphic regions from all seven species. The amplicon sequences were used to design 88 9mer hybridization probes which were arrayed onto glass slides. Single-stranded, fluorescence-tagged PCR products were hybridized to the microarrays at 15degreesC. The experimental results were compared with the DeltaGdegrees values for all matched and mismatched duplexes possible between the synthetic probes and the 16S target sequences of the seven test species, calculated using a 'virtual hybridization' software program. Although the observed hybridization patterns differed significantly from patterns predicted solely on the basis of perfect sequence matches, a unique hybridization fingerprint was obtained for each of the species, including closely related Pseudomonas species, and there was a reasonable correlation between the intensity of observed hybridization signals and the calculated DeltaGdegrees values. The results suggest that both perfect and mismatched pairings can contribute to microbial identification by hybridization fingerprinting MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000181081500030 L2 - NEAREST-NEIGHBOR THERMODYNAMICS; TETHERED OLIGONUCLEOTIDE PROBES; DOT-T MISMATCHES; RIBOSOMAL-RNA; DNA; SYSTEM; NMR SO - Nucleic Acids Research 2003 ;31(2):779-789 9262 UI - 7339 AU - Reyes-Villanueva F AU - Becnel JJ AU - Butler JF AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Secc Patol Vectores, Lab Entomol Med, San Nicolas de los Garza 66450, NL, MexicoUSDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32608, USAUniv Florida, Dept Entomol & Nematol, Gainesville, FL, USAReyes-Villanueva, F, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Secc Patol Vectores, Lab Entomol Med, Apdo Postal 109-F, San Nicolas de los Garza 66450, NL, Mexico TI - Susceptibility of Aedes aegypti and Aedes albopictus larvae to Ascogregarina culicis and Ascogregarina taiwanensis (Apicomplexa : Lecudinidae) from Florida AB - The susceptibility of Aedes aegypti to Ascogregarina culicis and Aedes albopictus to Ascogregurina taiwanensis was examined with mosquito and parasite strains from Tampa, FL. When each host was bioassayed with its natural gregarine, the infection intensity indicated that Ae. aegypti was 59% more susceptible to A. culicis (87 gamonts/larva) than Ae. albopictus to A. talwanensis (47 gamonts/larva). Infections in single and mixed host populations exposed to 100 oocysts/larva of one and both parasites demonstrated that Ae. aegypti harbors higher A. culicis gamont loads than Ae. albopictus of A. taiwanensis. In dual gregarine exposures of single host populations, the A. culicis infection intensity in Ae. aegypti was reduced by similar to50%. A. tahvanensis exhibited the same capability of infecting Ae. albopictus in single and dual exposures. In mixed host populations there were no cross infections, but A. talwanensis in Ae. albopictus produced an infection intensity of similar to70% lower than that of A. culicis in Ae. aegypti. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Zoology U5 - J;Article AV - English IS - 0022-2011 UR - ISI:000185607300007 L2 - Apicomplexa;gregarine;Aedes aegypti;Aedes albopictus;Ascogregarina culicis;Ascogregarina taiwanensis;strain;infection intensity;gamont;LANKESTERIA-CULICIS; DIPTERA; MOSQUITOS; PATHOGENICITY; ROSS SO - Journal of Invertebrate Pathology 2003 ;84(1):47-53 9263 UI - 7843 AU - Reyes A AU - Moran CA AU - Suster S AU - Michal M AU - Dominguez H AD - MD Anderson Canc Ctr, Dept Pathol, Houston, TX 77030, USAOhio State Univ, Dept Pathol, Columbus, OH 43210, USADept Pathol, Plzen, Czech RepublicCanc Inst Mexico, Dept Pathol, Mexico City, DF, MexicoMoran, CA, MD Anderson Canc Ctr, Dept Pathol, Box 85, Houston, TX 77030 USA TI - Neuroendocrine carcinomas (carcinoid tumor) of the testis - A clinicopathologic and immunohistochemical study of ten cases AB - We studied 10 cases of primary pure testicular neuroendocrine carcinoma. Patients were between 16 and 48 years old and had testicular swelling with pain or a painless testicular mass and no history of neuroendocrine carcinoma or other malignant neoplasm. All underwent orchiectomy. The tumors were low (n = 9) and intermediate (n = 1) grades with a variegated histologic appearance characterized by a nesting pattern, cords of neoplastic cells with rosettes, or sheets of neoplastic cells. Mitotic activity was lacking in 9 cases. In 1 case, mitotic figures ranged from 7 to 8 per 10 high-power fields, and cellular atypia and comedo-like necrosis were present. Immunohistochemical studies using a keratin cocktail, chromogranin, synaptophysin, epidermal growth factor, p53, placental-like alkaline phosphatase, and CD117 (c-kit) were performed in all cases. Keratin, chromogranin, and synaptophysin were positive in all tumors. Clinical follow-up information was obtained for 6 patients (range, 12-60 months): 5 with low-grade tumors were alive 24 to 60 months after diagnosis; I with an intermediate-grade tumor died of tumor 12 months after initial diagnosis. The behavior of these tumors, while in the testicular region, correlates well with the histologic grade. We propose replacing the term testicular carcinoid with neuroendocrine carcinoma, which better reflects the nature of these neoplasms MH - Czech Republic MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: AMER SOC CLINICAL PATHOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Pathology U5 - J;Article AV - English IS - 0002-9173 UR - ISI:000184422600004 L2 - carcinoid;testis;neuroendocrine;carcinoma;immunohistochemistry;METASTASIS; TERATOMA; BOY SO - American Journal of Clinical Pathology 2003 ;120(2):182-187 9264 UI - 9388 AU - Reyes EAA AU - Drew RAL AD - Univ Michoacana de San Nicola de Hidalgo, Inst Invest, Morelia, Michoacan, MexicoMcGill Univ, Dept Min Met & Mat Engn, Montreal, PQ H3A 2B2, CanadaReyes, EAA, Univ Michoacana de San Nicola de Hidalgo, Inst Invest, Morelia, Michoacan, Mexico TI - Kinetic study of amorohous yttria-alumina fibers using differential thermal analysis AB - Differential thermal analysis (DTA) was used to study the crystallization phenomena in Y2O3-Al2O3 fibers formed via a melt extraction process. Such fibers are X-ray amorphous and optically transparent regardless of composition in the as-extracted state but can be crystallized to produce various equilibrium phases that depend on the original composition of the ceramic rods used in the extraction process. The activation energy values were calculated using Kissinger and Augis-Bennett equations by measuring the variation of the peak temperature in the differential thermal patterns with heating rate. X-ray diffractometry analysis was used to determine the phase formation in the fibers crystallized after the DTA scan MH - Canada MH - Mexico|Michoacan PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000180443100007 L2 - CRYSTALLIZATION SO - Journal of the American Ceramic Society 2003 ;86(1):43-48 9265 UI - 7591 AU - Reyes GG AU - Verdugo JM AU - Cassin D AU - Carvajal R AD - Univ Autonoma Sinaloa, Fac Ciencias Mar, Mazatlan 82000, Sin, MexicoCNR, Inst Biol Mare, I-30122 Venice, ItalyReyes, GG, Univ Autonoma Sinaloa, Fac Ciencias Mar, Paseo Claussen S-N, Mazatlan 82000, Sin, Mexico TI - Pollution by polychlorinated biphenyls in an estuary of the Gulf of California. Their toxicity and bioaccumulation in shrimp Litopenaeus vannamei MH - Italy MH - Mexico|Sinaloa PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000184975300019 L2 - PCBs pollution;Gulf of California;shrimps effects SO - Marine Pollution Bulletin 2003 ;46(8):959-963 9266 UI - 6706 AU - Reyes MEP AU - Tan SK AU - Malina RM AD - Escuela Nacl Antropol & Hist, Mexico City, DF, MexicoDef Med Res Inst, Singapore, SingaporeTarleton State Univ, Stephenville, TX, USAMichigan State Univ, Ctr Latin Amer & Caribbean Studies, E Lansing, MI 48824, USAMalina, RM, Route 2,Box 140, Bay City, TX 77414, USA TI - Urban-rural contrasts in the growth status of school children in Oaxaca, Mexico AB - Objectives: The growth status of school children resident in an urban colonia and in a rural indigenous community in Oaxaca, southern Mexico, was considered in the context of two objectives, current status and the magnitude of urban-rural differences over a span of about 30 years. Both communities were initially surveyed in 1968 and 1972. Materials and methods: Height, body mass, segment lengths, skeletal breadths, limb circumferences, and subcutaneous fatness were taken on 361 rural (177 boys, 184 girls) and 339 urban (173 boys, 166 girls) school children, aged 6-13 years. Additional variables were derived. Results: Height and body mass were significantly greater in urban compared with rural children. Sitting height, estimated leg length and skeletal breadths on the trunk were also larger in urban than in rural school children, but only the difference in skeletal breadths was significant after age and body size were statistically controlled. Urban and rural children did not consistently differ in skeletal breadths on the extremities and limb circumferences. Subcutaneous fatness was more variable. After controlling for age and body size, rural girls had thicker skinfolds. The magnitude of the urban-rural difference in boys in 2000 was greater for body mass, BMI and triceps skinfold, and reduced for height, sitting height, leg length, and arm and estimated arm muscle circumferences compared with 1970. The magnitude of the urban-rural difference in girls was greater in 2000 than 30 years earlier for body mass, height, sitting height, leg length and BMI. Urban-rural differences for arm and arm muscle circumferences and the triceps skinfold were slightly smaller over the interval. Conclusions: Children resident in an urban colonia were taller and heavier than children resident in a rural indigenous community. After controlling for age and body size, urban-rural differences in skeletal breadths and limb circumferences were reduced or eliminated, but skinfold thicknesses were greater in rural girls. The magnitude of urban-rural differences in body size has decreased over approximately 30 years in boys, but has increased in girls MH - Mexico|Distrito Federal MH - Singapore MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 8 U4 - Biology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0301-4460 UR - ISI:000187296100005 L2 - ZAPOTEC COMMUNITY; VALLEY; AGE SO - Annals of Human Biology 2003 ;30(6):693-713 9267 UI - 7113 AU - Reynolds WF AU - Enriquez RG AD - Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, CanadaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoReynolds, WF, Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada TI - The advantages of forward linear prediction over multiple aliasing for obtaining high-resolution HSQC spectra in systems with extreme spectral crowding AB - The resolution obtained for the highly crowded C-13-H-1 HSQC spectrum of a mixture of three trisaccharides using forward linear prediction is compared with that recently reported for the same mixture but using multiple (100-fold or greater) aliasing of HSQC spectra in combination with a computer program to unfold the aliased spectra. It is shown that forward linear prediction gives slightly superior resolution while avoiding the significant sensitivity loss associated with the very narrow spectral windows and consequent long evolution times required for the multiple aliasing method. Copyright (C) 2003 John Wiley Sons, Ltd MH - Canada MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000186250300005 L2 - NMR;forward linear prediction;aliased spectra;HSQC;polysaccharides;spectral crowding;NMR-SPECTROSCOPY SO - Magnetic Resonance in Chemistry 2003 ;41(11):927-932 9268 UI - 9500 AU - Reynoso-Camacho R AU - De Mejia EG AU - Loarca-Pina G AD - Univ Autonoma Queretaro, Sch Chem, PROPAC, Programa Posgrado Alimentos Ctr Republ, Queretaro 76010, Mexicode Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 260 Bevier Hall,905 S Goodwin, Urbana, IL 61801 USA TI - Purification and acute toxicity of a lectin extracted from tepary bean (Phaseolus acutifolius) AB - Lectins are proteins or glycoproteins known for their ability to agglutinate cells, especially erythrocytes. Several lectins are toxic to mammalian cells both in vitro and in vivo, inhibit growth when incorporated into the diet and are toxic when injected into animals. On the other hand, the use of lectins has been suggested as an alternative in cancer treatment. The objective of the present study was to evaluate the acute toxicity of a lectin extracted and purified from tepary bean (Phaseolus acutifolius, G-400-34) on CD-1 mice. Fetuin affinity chromatography, electrophoretic pattern and Western-immunoblot techniques were used to purify and partially characterize the lectin. This tepary bean line presented high levels of lectin activity. Western blot revealed that the sera reacted with the known PHA subunits in the 34-40 kD range. Four major lectin and lectin-related glycopolypeptides were identified. The purified lectin from tepary bean was a tetrameric one that ran at about 115-120 kD. The LD50 (ip) was 1100 mg/kg body weight for mates and 1120 mg/kg body weight for females. The body weight of experimental animals decreased in a dose-dependent manner. The main target organs affected were small intestine, spleen and thymus. The lectin isolated from tepary bean showed affinity towards fetuin, with high agglutination values and low acute toxicity. (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Food Science & Technology;Toxicology U5 - J;Article AV - English IS - 0278-6915 UR - ISI:000180036300003 L2 - lectins;Phaseolus acutifolius;tepary beans;acute toxicity;GASTROINTESTINAL-TRACT; PLANT-LECTINS; VULGARIS; PHYTOHEMAGGLUTININ; GROWTH; RATS; PROTEINS; RICIN; RECOGNITION; METABOLISM SO - Food and Chemical Toxicology 2003 ;41(1):21-27 9269 UI - 8849 AU - rguelles-Monal W AU - Goycoolea FM AU - Lizardi J AU - Peniche C AU - Higuera-Ciapara I AD - Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv La Habana, IMRE, Havana 10400, CubaUniv La Habana, Ctr Biomat, Havana 10400, CubaArguelles-Monal, W, CIAD, Unidad Guaymas, Carretera Varadero Nacl Km 6-6,Apdo Postal 284, Guaymas 85400, Sonora, Mexico TI - Chitin and chitosan in dell network systems MH - Cuba MH - Mexico|Sonora PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary U5 - S;Review AV - English IS - 0097-6156 UR - ISI:000181755600007 L2 - KAPPA-CARRAGEENAN; GEL POINT; GELATION; POLYMER; VISCOELASTICITY; CONFORMATION; ASSOCIATION; RHEOLOGY SO - Polymer Gels: Fundamentals and Applications 2003 ;833():102-121 9270 UI - 6903 AU - Riba-Hernandez P AU - Stoner KE AU - Lucas PW AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 48980, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaUniv Hong Kong, Dept Anat, Hong Kong, SAR, Peoples R ChinaStoner, KE, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Apartado Postal 27-3 Xangari, Morelia 48980, Michoacan, Mexico TI - The sugar composition of fruits in the diet of spider monkeys (Ateles geoffroyi) in tropical humid forest in Costa Rica AB - Spider monkeys (Ateles geoffroyi) detect sucrose at a threshold lower than any primate yet tested and prefer sucrose to glucose or fructose in laboratory tests. This preferential selection of sucrose led to the hypothesis that such acute discrimination is related to a diet of sucrose-rich fruits. Furthermore, it has been suggested that fruit sugars may be related to distinct guilds of vertebrate seed-dispersers. The objectives of this study were: (1) to test if spider monkeys select sucrose-rich fruits both within and among plant species and (2) to test the hypothesis that sugar concentration is related to bird, bat or monkey seed-dispersal syndromes. Data were collected from one troop of spider monkeys in south-westem Costa Rica. Interspecific comparison of ingested fruits shows that spider monkeys consumed species with significantly higher concentrations of glucose and fructose than sucrose. Similarly, at the intraspecific level, food-fruits had significantly more fructose and glucose than non-food fruits, but no difference was found for sucrose. The three different sugar types were not correlated with the importance of the species in the diet based on the amount of time they spent consuming each species. Although sucrose concentrations were significantly higher in primate-dispersed species compared with those dispersed by other vertebrates, soluble carbohydrates in primate-dispersed fruits were principally composed of glucose and fructose. Neither fructose nor glucose concentrations showed significant differences across the three categories of seed dispersal MH - Costa Rica MH - Mexico|Michoacan MH - Peoples R China PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000186710800010 L2 - Ateles geoffroyi;Costa Rica;frugivorous primates;fruit sugar composition;seed dispersal syndromes;spider monkeys;sugar preferences;FOOD-ASSOCIATED SUGARS; EVOLUTIONARY IMPLICATIONS; GUSTATORY THRESHOLDS; NUTRITIONAL VALUES; WILD FRUITS; SWEET TASTE; PREFERENCES; BIRDS; BATS; STRATEGIES SO - Journal of Tropical Ecology 2003 ;19():709-716 9271 UI - 7252 AU - Richer MG AU - Lopez JA AU - Steffen W AU - Tovmassian GH AU - Stasinska G AU - Echevarria J AD - UNAM, Inst Astron, Observ Astron Nacl, San Diego, CA 92143, USAObserv Meudon, LUTH, F-92195 Meudon, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoRicher, MG, UNAM, Inst Astron, Observ Astron Nacl, POB 439027, San Diego, CA 92143 USA TI - The kinematics of the most oxygen-poor planetary nebula PNG 135.9+55.9 AB - PNG135.9 + 55.9 is a compact, high excitation nebula that has been identified recently as the most oxygen-poor halo planetary nebula. Given its very peculiar characteristics and potential implications in the realms of stellar and Galactic evolution, additional data are needed to firmly establish its true nature and evolutionary history. Here we present the first long-slit, high spectral resolution observations of this object in the lines of Halpha and He IIlambda4686. The position-velocity data are shown to be compatible with the interpretation of PNG135.9 + 55.9 being a halo planetary nebula. In both emission lines, we find the same two velocity components that characterize the kinematics as that of an expanding elliptical envelope. The kinematics is consistent with a prolate ellipsoidal model with axis ratio about 2: 1, a radially decreasing emissivity distribution, a velocity distribution that is radial, and an expansion velocity of 30 km s(-1) for the bulk of the material. To fit the observed line profiles, this model requires an asymmetric matter distribution, with the blue-shifted emission considerably stronger than the red-shifted emission. We find that the widths of the two velocity components are substantially wider than those expected due to thermal motions, but kinematic structure in the projected area covered by the slit appears to be sufficient to explain the line widths. The present data also rule out the possible presence of an accretion disk in the system that could have been responsible for a fraction of the Halpha flux, further supporting the planetary nebula nature of PNG135.9 + 55.9 MH - USA MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000185991200021 L2 - planetary nebulae : individual : PNG 135.9+55.9, SBS 1150+599A;POPULATIONS; GALAXIES; EVOLUTION; ABUNDANCE; BIPOLAR; MODELS; STAR SO - Astronomy & Astrophysics 2003 ;410(3):911-916 9272 UI - 9638 AU - Richer MG AU - Georgiev L AU - Rosado M AU - Bullejos A AU - Valdez-Gutierrez M AU - Dultzin-Hacyan D AD - UNAM, Inst Astron, Observ Astron Nacl, San Diego, CA 92143, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Astrofis Canarias, Tenerife 38200, SpainObserv Paris, LERMA, F-75014 Paris, FranceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRicher, MG, UNAM, Inst Astron, Observ Astron Nacl, POB 439027, San Diego, CA 92143 USA TI - Is HCG 31 undergoing a merger or a fly-by interaction? AB - We present Fabry-Perot and multi-object spectroscopy of the galaxies in Hickson compact group 31 (HCG 31). Based upon our Halpha data cubes, galaxies A and C are a single entity, showing no discontinuity in their kinematics. Kinematically, galaxy E is probably a component of the A+C complex; otherwise it is a recently detached fragment. Galaxy F appears, both kinematically and chemically, to have formed from material tidally removed from the A+C complex. Galaxies B and G are kinematically distinct from this complex. Galaxy Q also has a radial velocity compatible with group membership. Galaxies A, B, C, and F have nearly identical oxygen abundances, despite spanning a luminosity range of 5 mag. Galaxy B's oxygen abundance is normal for its luminosity, while galaxy F's abundance is that expected given its origin as a tidal fragment of the A+C complex. The oxygen abundances in galaxies A and C are also understandable if the A+C complex is a late-type spiral suffering strong gas inflow and star formation as a result of a tidal interaction. Given the kinematics of both the galaxies and the Hi gas, the oxygen abundances, and the position of galaxy G, we propose that an interaction of galaxy G with the A+C complex, rather than a merger of galaxies A and C, is a more complete explanation for the tidal features and other properties of HCG 31. In this case, the A+C complex need not be a merger in progress, though this is not ruled out MH - USA MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000179768500010 L2 - galaxies : abundances;galaxies : evolution;galaxies : formation;galaxies : individual : NGC 1741;galaxies : clusters : individual : HCG 31;H-II REGIONS; MERGING DISK GALAXIES; GIANT ELLIPTIC GALAXY; RECENT STAR-FORMATION; COMPACT-GROUPS; DWARF GALAXIES; CHEMICAL ABUNDANCES; HUBBLE SEQUENCE; UGC-7636; SYSTEM SO - Astronomy & Astrophysics 2003 ;397(1):99-107 9273 UI - 6732 AU - Richman AD AU - Herrera LG AU - Nash D AU - Schierup MH AD - Montana State Univ, Dept Plant Sci, Bozeman, MT 59717, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoAarhus Univ, Bioinformat Res Ctr, Dept Ecol & Genet, DK-8000 Aarhus, DenmarkRichman, AD, Montana State Univ, Dept Plant Sci, Bozeman, MT 59717, USA TI - Relative roles of mutation and recombination in generating allelic polymorphism at an MHC class II locus in Peromyseus maniculatus AB - The MHC class II loci encoding cell surface antigens exhibit extremely high allelic polymorphism. There is considerable uncertainty in the literature over the relative roles of recombination and de novo mutation in generating this diversity. We studied class II sequence diversity and allelic polymorphism in two populations of Peromyscus maniculatus, which are among the most widespread and abundant mammals of North America. We find that intragenic recombination (or gene conversion) has been the predominant mode for the generation of allelic polymorphism in this species, with the amount of population recombination per base pair exceeding mutation by at least an order of magnitude during the history of the sample. Despite this, patchwork motifs of sites with high linkage disequilibrium are observed. This does not appear to be consistent with the much larger amount of recombination versus mutation in the history of the sample, unless the recombination rate is highly non-uniform over the sequence or selection maintains certain sites in linkage disequilibrium. We conclude that selection is most likely to be responsible for preserving sequence motifs in the presence of abundant recombination MH - Denmark MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 18 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6723 UR - ISI:000187284500002 L2 - HISTOCOMPATIBILITY COMPLEX LOCI; BALANCING SELECTION; NUCLEOTIDE SUBSTITUTION; OVERDOMINANT SELECTION; HETEROZYGOTE ADVANTAGE; POPULATION-STRUCTURE; NATURAL-SELECTION; DIVERSITY; EVOLUTION; SEQUENCES SO - Genetical Research 2003 ;82(2):89-99 9274 UI - 8339 AU - Richman AD AU - Herrera LG AU - Nash D AD - Montana State Univ, Dept Plant Sci, Bozeman, MT 59717, USAUniv Nacl Autonoma Mexico, Dept Zool, Mexico City 04510, DF, MexicoRichman, AD, Montana State Univ, Dept Plant Sci, 119 AgBioSci Bldg, Bozeman, MT 59717 USA TI - Evolution of MHC class II E beta diversity within the genus Peromyscus AB - Progress in understanding the evolution of variation at the MHC has been slowed by an inability to assess the relative roles of mutation vs. intragenic recombination in contributing to observed polymorphism. Recent theoretical advances now permit a quantitative treatment of the problem, with the result that the amount of recombination is at least an order of magnitude greater than that of mutation in the history of class II genes. We suggest that this insight allows progress in evaluating the importance of other factors affecting the evolution of the MHC. We investigated the evolution of MHC class II Ebeta sequence diversity in the genus Peromyscus. We find evidence for extensive recombination in the history of these sequences. Nevertheless, it appears that intragenic recombination alone is insufficient to account for evolution of MHC diversity in Peromyscus. Significant differences in silent variation among subgenera arose over a relatively short period of time, with little subsequent, change. We argue that these observations are consistent with the effects of historical population bottleneck(s). Population restrictions may explain general features of MHC, evolution, including the large amount of recombination in the history of MHC genes, because intragenic recombination may efficiently regenerate allelic polymorphism following a poptulation constriction MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: GENETICS RP - NOT IN FILE U3 - TC 10 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6731 UR - ISI:000183119700026 L2 - MAJOR HISTOCOMPATIBILITY COMPLEX; BALANCING SELECTION; SELF-INCOMPATIBILITY; NATURAL-SELECTION; MOLECULAR CLOCK; POLYMORPHISM; LOCI; RECOMBINATION; GENES; POPULATION SO - Genetics 2003 ;164(1):289-297 9275 UI - 9270 AU - Rico-Martinez R AU - Krischer K AU - Flatgen G AU - Anderson JS AU - Kevrekidis IG AD - Inst Technol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoMax Planck Gesell, Fritz Haber Inst, D-14195 Berlin, GermanyPrinceton Univ, Dept Chem Engn, Princeton, NJ 08544, USARico-Martinez, R, Inst Technol Celaya, Dept Ingn Quim, Celaya 38010, Gto, Mexico TI - Adaptive detection of instabilities: an experimental feasibility study AB - We implement a practical protocol for the active, on-line detection of bifurcations in experimental systems, based on real-time identification and feedback control ideas. Current experimental practice for the detection of bifurcations typically requires long observation times in the vicinity of marginally stable solutions, as well as frequent re-settings of the experiment for the detection of turning point or subcritical bifurcations. The approach exemplified here addresses these issues drawing from numerical bifurcation detection procedures. The main idea is to create an augmented experiment, using the experimental bifurcation parameter(s) as additional state variables. We implement deterministic laws for the evolution of these new variables by coupling the experiment with an on-line, computer-assisted identification/feedback protocol. The "augmented" experiment (the closed-loop system) thus actively converges to what, for the original experiment (the open-loop system), is a bifurcation point. We apply this method to the real-time, computer-assisted detection of period-doubling bifurcations in an electronic circuit. The method succeeds in actively driving the circuit to the bifurcation points, even in the presence of modest experimental uncertainties, noise, and limited resolution. The active experimental tracing of a codimension-1 bifurcation boundary in two-parameter space is also demonstrated. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000180663200001 L2 - bifurcation detection;nonlinear systems;adaptive control;BIFURCATIONS; PRECURSORS SO - Physica D-Nonlinear Phenomena 2003 ;176(1-2):1-18 9276 UI - 6935 AU - Rico-Ramirez V AU - Diwekar UM AU - Morel B AD - Inst Tecnol Celaya, Celaya 38010, Gto, MexicoUniv Illinois, Inst Environm Sci & Policy, Dept Chem Engn, Ctr Uncertain Syst,CUSTOM, Chicago, IL 60607, USACarnegie Mellon Univ, Dept Engn & Publ Policy, Pittsburgh, PA 15213, USADiwekar, UM, Univ Illinois, Inst Environm Sci & Policy, Dept Chem Engn, Ctr Uncertain Syst,CUSTOM, Chicago, IL 60607 USA TI - Real option theory from finance to batch distillation AB - Batch distillation processes have gained renewed interest because of the recent development in small-scale industries producing high-value-added, low-volume specialty chemicals. The flexibility and unsteady state nature of batch distillation constitute a challenge for the designer. A particularly difficult problem is the optimal control problem involving open loop solution for the reflux ratio profile. This is because of the complexity of the formulation and the large computational effort associated to its solution. The mathematical and numerical complexities of the optimal control problem get worse when uncertainty is present in the formulation. In this work, by applying the optimality conditions from the real option theory based on the Ito's Lemma [Investment under uncertainity (1994); Memoirs Am. Math. Soc. 4 (1951) 1; Appl. Math. Opt. 4 (1974) 374], the mathematical tools needed to solve optimal control problems in batch distillation columns when uncertainties in the state variables are present have been developed. Furthermore, the coupled maximum principle and NLP approach developed by Diwekar [Am. Inst. Chem. Eng. J. 38 (1992) 1551] has been extended for solving the optimal control problem in the uncertain case. This new algorithm has been implemented in the MultiBatchDS batch distillation process simulator. Finally, a numerical case-study is presented to show the scope and application of the proposed approach. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000186564200011 L2 - real option theory;batch distillation control;stochastic optimal control;OPTIMAL-DESIGN; RATE POLICY; COLUMNS SO - Computers & Chemical Engineering 2003 ;27(12):1867-1882 9277 UI - 6988 AU - Rico CJL AU - Ohnishi R AU - Ichikawa M AD - Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 060, JapanUniv Michoacana, Fac Chem Engn & IIM, Catalysis Lab, Morelia 58000, Michoacan, MexicoRico, CJL, Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 060, Japan TI - Ethylene reaction at high temperatures on HZSM-5 AB - The catalytic cracking of ethylene was investigated at 973 K and 873 K, at atmospheric pressure and in presence of a weakly dehydroxylated (WD), or strongly dehydroxylated (SD), HZSM-5. At 873 K the catalytic activity of the WD sample is very small, whereas the one for the SO sample is significant However, at 973 K a significant amount of ethane was produced by the SD sample, whereas benzene was the main product for the WD zeolite. A very rich and wide hydrocarbon product distribution was observed for the WD sample and its catalytic activity was stable, even after a long time on stream. A difference in product selectivity for the two catalysts was also observed. Since the surface areas of both catalysts strongly decreased during reaction, due to the formation of carbonaceous species, whose catalytic activity is still significant, it demonstrates that those species play an active role on the ethylene reaction, probably acting as a proton source. The catalysts were also characterised by BET, XRD, SEM and by an Induction Furnace. Our results also show that the carbonaceous species formed on both spent catalysts are amorphous in nature, the carbon content is high and the morphology is different MH - Japan MH - Mexico|Michoacan PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0001-9704 UR - ISI:000186602100008 L2 - ethylene cracking;dehydroxylation;zeolite;SILICA-ALUMINA CATALYSTS; BUTENE ISOMERIZATION; ZEOLITE H-ZSM-5; HYDROGEN HELD; SMALL OLEFINS; TRACER; OLIGOMERIZATION; CYCLOPROPANE; METHANE; SOLIDS SO - Afinidad 2003 ;60(506):376-381 9278 UI - 8732 AU - Rico JJ AU - Madrigal M AU - Acha E AD - Univ Michoacana, Fac Ingn Elect, Morelia 58000, Michoacan, MexicoUniv Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, ScotlandRico, JJ, Univ Michoacana, Fac Ingn Elect, Morelia 58000, Michoacan, Mexico TI - Dynamic harmonic evolution using the extended harmonic domain AB - A novel methodology is presented in this paper for conducting transient and steady-state analysis of electric networks containing nonlinearities and switching plants components. The method is termed the extended harmonic domain (EHD) method as may be seen as an extension of the harmonic domain (HD) method used in steady-state analysis. It is shown in the paper that EHD is a natural approach for conducting dynamic and steady-state studies of the evolution of harmonies in power circuits containing nonlinear components and flexible ac transmission systems (FACTS) devices. It is also shown in the paper that EHD provides a suitable basis for extending the well-known steady-state power quality indices to the transient range. To illustrate the use of the theory, a three-phase linear circuit and a three-phase PWM-STATCOM are modeled using EHD. The results are compared against those provided by industry standard tools as PSCAD/EMTDC and Matlab MH - Mexico|Michoacan MH - United Kingdom PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000182225400035 L2 - extended harmonic domain;Fourier series;harmonic domain;linear time periodic systems;switching functions;transient and harmonic analysis;STEADY-STATE SO - Ieee Transactions on Power Delivery 2003 ;18(2):587-594 9279 UI - 7813 AU - Rico JM AU - Gallardo J AU - Ravani B AD - Inst Tecnol Celaya, Dept Ingn Mecan, Celaya 38010, Gto, MexicoUniv Calif Davis, Dept Mech & Aeronaut Engn, Davis, CA 95616, USARico, JM, Inst Tecnol Celaya, Dept Ingn Mecan, Celaya 38010, Gto, Mexico TI - Lie algebra and the mobility of kinematic chains AB - This paper deals with the application of Lie Algebra to the mobility analysis of kinematic chains. It develops an algebraic formulation of a group-theoretic mobility criterion developed recently by two of the authors of this publication. The instantaneous form of the mobility criterion presented here is based on the theory of subspaces and subalgebras of the Lie Algebra of the Euclidean group and their possible intersections. It is shown using this theory that certain results on mobility of over-constraint linkages derived previously using screw theory are not complete and accurate. The theory presented provides for a computational approach that would allow efficient automation of the new group-theoretic mobility criterion. The theory is illustrated using several examples. (C) 2003 Wiley, Periodicals, Inc MH - Mexico|Guanajuato MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Robotics U5 - J;Article AV - English IS - 0741-2223 UR - ISI:000184482700005 L2 - DISPLACEMENT GROUPS; SCREW SYSTEMS; MECHANISMS; GEOMETRY SO - Journal of Robotic Systems 2003 ;20(8):477-499 9280 UI - 7579 AU - Riech I AU - Mendoza-Alvarez JG AU - Gomez-Herrera ML AU - Herrera-Perez JL AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoIPN, Ctr Invest Ciencia Aplicada & Tecnol, Mexico City 07738, DF, MexicoIPN, Ctr Invest Ciencia Aplicada & Tecnol, Unidad Puebla, Puebla, MexicoUniv La Habana, IMRE, Havana 10400, CubaRiech, I, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Effect of Te doping of InGaAsSb layers on the interface quality of InGaAsSb/GaSb heterojunctions AB - Using the liquid phase epitaxy technique we have grown quaternary p-type Ga0.84In0.16As0.14Sb0.86 layers on n-type GaSb substrates (p-N), as well as n-type layers on p-type substrates (n-P). It has been known that doping with tellurium to obtain n-type InGaAsSb layers, has important effects on the quality of the interface at the heterojunction epitaxial layer/substrate, because of the high diffusion coefficient of the Te atoms. In this work, we have applied the photoacoustic technique to measure the interface recombination velocity in both types of samples: p-N and n-P heterojunctions, and we have compared these results with measurements of atomic force microscopy made along the cross section of the interface substrate-epitaxial layer. Results from both techniques show that there is a better interface quality for the p-N heterojunction as compared to those for the N-p interfaces. The discussion of this behaviour is presented in terms of the behaviour of Te diffusion during the growth of the InGaAsSb epitaxial layers MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0268-1242 UR - ISI:000185040400008 L2 - GALNSBAS SOLID-SOLUTIONS SO - Semiconductor Science and Technology 2003 ;18(8):763-767 9281 UI - 8073 AU - Riera A AU - Raga AC AU - Reipurth B AU - Amram P AU - Boulesteix J AU - Canto J AU - Toledano O AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, Dept Fis & Engn Nucl, E-08800 Vilanova I La Geltru, SpainUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainUniv Hawaii, Inst Astron, Honolulu, HI 96822, USAObserv Marseille, Lab Astrophys Marseille, F-13248 Marseille 4, FranceUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoRiera, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Fabry-Perot observations of the HH 110 jet AB - We have obtained an Halpha position-velocity cube from Fabry-Perot interferometric observations of the HH 110 flow. We analyze the results in terms of anisotropic wavelet transforms, from which we derive the spatial distribution of the knots, as well as their characteristic sizes ( along and across the outflow axis). We then study the spatial behavior of the line width and the central radial velocity. The results are interpreted in terms of a simple "mean flow plus turbulent eddy ''jet/wake model. We find that most of the observed kinematics appears to be a direct result of the mean flow, on which are superposed low-amplitude (similar to35 km s(-1)) turbulent velocities MH - France MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000183905500029 L2 - ISM : Herbig-Haro objects;ISM : individual (HH 110);ISM : jets and outflows;ISM : kinematics and dynamics;ALPHA VELOCITY-FIELDS; ROTATION CURVES; MOLECULAR CLOUDS; HH 110; GALAXIES; CLUSTERS; COLLISION; SIMULATIONS; CORE SO - Astronomical Journal 2003 ;126(1):327-338 9282 UI - 9124 AU - Riera A AU - Lopez R AU - Raga AC AU - Estalella R AU - Anglada G AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, Dept Fis & Engn Nucl, Geltru 08800, SpainUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainCSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainRiera, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - The transverse velocity and excitation structure of the HH 110 jet AB - We present long-slit spectroscopic observations of the HH 110 jet obtained with the 4.2 m William Herschel Telescope. We have obtained for the first time, spectra for slit positions along and across the jet axis (at the position of knots B, C, I, J and P) to search for the observational signatures of entrainment and turbulence by studying the kinematics and the excitation structure. We find that the HH 110 flow accelerates from a velocity of 35 km s(-1) in knot A up to 110 km s(-1) in knot P. We find some systematic trends for the variation of the emission line ratios along the jet. No clear trends for the variation of the radial velocity are seen across the width of the jet beam. The cross sections of the jet show complex radial velocity and line emission structures which differ quite strongly from each other MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000181177300022 L2 - ISM : individual : HH 110;ISM : jets and outflows;stars : pre-main sequence;CLOUD CORE; HH-110; COLLISION SO - Astronomy & Astrophysics 2003 ;400(1):213-221 9283 UI - 8963 AU - Rigon L AU - Turatto M AU - Benetti S AU - Pastorello A AU - Cappellaro E AU - Aretxaga I AU - Vega O AU - Chavushyan V AU - Patat F AU - Danziger IJ AU - Salvo M AD - Osserv Astron Padova, INAF, I-35122 Padua, ItalyUniv Padua, Dipartimento Astron, I-35122 Padua, ItalyOsserv Astron Capodimonte, INAF, I-80131 Naples, ItalyIst Nacl Astrofis Opt & Electron, Puebla, MexicoEuropean So Observ, D-85748 Garching, GermanyOsserv Astron Trieste, INAF, I-34131 Trieste, ItalyAustralian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, AustraliaRigon, L, Osserv Astron Padova, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy TI - SN 1999E: another piece in the supernova-gamma-ray burst connection puzzle AB - Detailed optical and near-infrared observations of supernova (SN) 1999E have confirmed early suggestions that this supernova was indeed a twin of the peculiar type II SN 1997cy: it was exceptionally luminous and had evolved slowly, and the line profiles had narrow peaks and broad wings, indicating interaction with the circumstellar material. Nevertheless, the most intriguing characteristic was that, in analogy to SN 1997cy, it exploded at a position consistent in time and location with a BATSE event (GRB 980910). The a posteriori probability that the only two SNe with such an optical appearance are associated with two different BATSE gamma-ray bursts (GRBs) is only 0.2 per cent. This raises the possibility that some GRBs are associated with H-rich SNe MH - Australia MH - Germany MH - Italy MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000181508000015 L2 - supernovae : general;supernovae : individual : SN 1999E;supernovae : individual : SN 1997cy;gamma-rays : bursts;25 APRIL 1998; CIRCUMSTELLAR MEDIUM; PROGENITOR; EXPLOSION; EMISSION; CATALOG; 1988Z; MASS SO - Monthly Notices of the Royal Astronomical Society 2003 ;340(1):191-196 9284 UI - 7125 AU - Rios-Mercado RZ AU - Bard JF AD - Univ Autonoma Nuevo Leon, Grad Program Syst Engn, San Nicolas De Los Garza 66450, NL, MexicoUniv Texas, Grad Program Operat Res, Austin, TX 78712, USARios-Mercado, RZ, Univ Autonoma Nuevo Leon, Grad Program Syst Engn, AP 111-F,Cd Univ, San Nicolas De Los Garza 66450, NL, Mexico TI - The flow shop scheduling polyhedron with setup times AB - This paper addresses the problem of improving the polyhedral representation of a certain class of machine scheduling problems. Despite the poor polyhedral representation of many such problems in general, it is shown that notably tighter linear programming representations can be obtained for many important models. In particular, we study the polyhedral structure of two different mixed-integer programming formulations of the flow shop scheduling problem with sequence-dependent setup times, denoted by SDST flow shop. The first is related to the asymmetric traveling salesman problem (ATSP) polytope. The second is less common and is derived from a model proposed by Srikar and Ghosh based on the linear ordering problem (LOP) polytope. The main contribution of this work is the proof that any facet-defining inequality (facet) of either of these polytopes (ATSP and LOP) induces a facet for the corresponding SDST flow shop polyhedron. The immediate benefit of this result is that all developments to date on facets and valid inequalities for both the ATSP and the LOP can be applied directly to the machine scheduling polytope. In addition, valid mixed-integer inequalities based on variable upper-bound flow inequalities for either model are developed as well. The derived cuts are evaluated within a branch-and-cut framework MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Interdisciplinary Applications;Mathematics, Applied U5 - J;Article AV - English IS - 1382-6905 UR - ISI:000186285200007 L2 - flow shop scheduling;setup times;polyhedral combinatorics;facet-defining inequalities;asymmetric traveling salesman problem;linear ordering problem;TRAVELING SALESMAN POLYTOPE; MILP MODEL; UP TIMES; HEURISTICS; FACETS; JOB SO - Journal of Combinatorial Optimization 2003 ;7(3):291-318 9285 UI - 9026 AU - Rios-Moreno G AU - Aguirre G AU - Parra-Hake M AU - Walsh PJ AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoUniv Penn, Dept Chem, P Roy & Diane T Vagelos Labs, Philadelphia, PA 19104, USAParra-Hake, M, Inst Tecnol Tijuana, Ctr Grad & Invest, Apartado Postal 1166, Tijuana 22000, BC, Mexico TI - Synthesis, characterization, and structure of dinuclear copper(I) and silver(I) complexes of ortho-functionalized 1,3-bis(aryl)triazenide ligands AB - The synthesis, characterization, and crystal structures of dinuclear copper(l) and silver(l) complexes with a functionalized 1,3-diaryl triazenide ligand are reported. The triazene ligand is substituted with carboxymethyl groups in the ortho positions of the aryl rings that can coordinate to electron deficient metals. Reaction of this ligand with Cu(OAc) and Ag(OAc) resulted in the formation of dinuclear complexes with an eight-membered ring core composed of the two triazenide ligands and two metals. In these complexes, only one carbonyl group of each triazenide ligand binds to the metal centers. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000181260600012 L2 - triazene;triazenide;copper(I) complex;silver(I) complex;dinuclear structure;BIDENTATE LEWIS-ACIDS; HYDROFORMYLATION CATALYST; COORDINATION CHEMISTRY; TRIAZENIDE COMPLEXES; CRYSTAL-STRUCTURES; ORGANIC-SYNTHESIS; REACTIVITY; 1,8-NAPHTHALENEDIYLBIS(DICHLOROBORANE); CLUSTERS; DESIGN SO - Polyhedron 2003 ;22(4):563-568 9286 UI - 7523 AU - Ripepi V AU - Marconi M AU - Bernabei S AU - Palla F AU - Pinheiro FJG AU - Folha DFM AU - Oswalt TD AU - Terranegra L AU - Ferro AA AU - Jiang XJ AU - Alcala JM AU - Marinoni S AU - Monteiro MJPF AU - Rudkin M AU - Johnston K AD - Osserv Astron Capodimonte, INAF, I-80131 Naples, ItalyOsservatorio Astron Bologna, INAF, I-40127 Bologna, ItalyUniv La Laguna, Dept Astrofis, San Cristobal la Laguna 30071, SpainOsserv Astrofis Arcetri, INAF, I-50125 Florence, ItalyUniv Porto, Ctr Astrofis, P-4150762 Oporto, PortugalFlorida Inst Technol, Melbourne, FL 32901, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R ChinaRipepi, V, Osserv Astron Capodimonte, INAF, Via Moiariello 16, I-80131 Naples, Italy TI - Multisite observations of the PMS delta Scuti star V351 Ori AB - We present the results of multisite observations spanning two years on the pre-main-sequence (PMS) star V351 Ori. A total of around 180 hours of observations over 29 nights have been collected, allowing us to measure five different periodicities, most likely related to the delta Scuti variability of V351 Ori. Comparison with the predictions of linear nonadiabatic radial pulsation models put stringent constraints on the stellar parameters and indicate that the distance to V351 Ori is intermediate between the lower limit measured by Hipparcos (210 pc) and that of the Orion Nebula (450 pc). However, radial pulsation models are unable to reproduce all of the observed frequencies with a single choice of (M-*, L-*, and T-eff), suggesting the presence of additional nonradial modes MH - Italy MH - Mexico|Distrito Federal MH - Peoples R China MH - Portugal MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000185212600027 L2 - stars : variables : delta Scuti;stars : oscillations;stars : pre-main sequence;stars : fundamental parameters;stars : individual : V351 Ori;HERBIG-AE-STAR; MAIN-SEQUENCE STARS; PULSATIONAL VARIABILITY; LIGHT VARIABILITY; PRAESEPE CLUSTER; TIME-SERIES; AE/BE STARS; SPACED DATA; HR-5999; ORIONIS SO - Astronomy & Astrophysics 2003 ;408(3):1047-+ 9287 UI - 6480 AU - Riquelme M AU - Fischer R AU - Bartnicki-Garcia S AD - Ctr Invest Cient & Educ Super, Ensenada 22860, Baja California, MexicoUniv Calif Riverside, Dept Plant Pathol, Riverside, CA 92521, USAMax Planck Inst Terr Mikrobiol, Marburg, GermanyBartnicki-Garcia, S, Ctr Invest Cient & Educ Super, Ensenada 22860, Baja California, Mexico TI - Apical growth and mitosis are independent processes in Aspergillus nidulans AB - It is well established that cytoplasmic microtubules are depolymerized during nuclear division and reassembled as mitotic microtubules. Mounting evidence showing that cytoplasmic microtubules were also involved in apical growth of fungal hyphae posed the question of whether apical growth became disrupted during nuclear division. We conducted simultaneous observations of mitosis (fluorescence microscopy) and apical growth (phase-contrast microscopy) in single hyphae of Aspergillus nidulans to determine if the key parameters of apical growth (elongation rate and Spitzenkorper behavior) were affected during mitosis. To visualize nuclei during mitosis, we used a strain of A. nidulans, SRS27, in which nuclei are labeled with the green-fluorescent protein. To reveal the Spitzenkorper and measure growth with utmost precision, we used computer-enhanced videomicroscopy. Our analysis showed that there is no disruption of apical growth during mitosis. There was no decrease in the rate of hyphal elongation or any alteration in Spitzenkorper presence before, during, or after mitosis. Our findings suggest that apical growth and mitosis do not compete for internal cellular resources. Presumably, the population of cytoplasmic microtubules involved in apical growth operates independently of that involved in mitosis MH - Germany MH - Mexico|Baja California MH - USA PB - VIENNA: SPRINGER-VERLAG WIEN RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences;Cell Biology U5 - J;Article AV - English IS - 0033-183X UR - ISI:000187993800012 L2 - Spitzenkorper;tip growth;mitosis;cytoplasmic microtubule;green-fluorescent protein;Aspergillus nidulans;SPINDLE POLE BODY; HYPHAL TIP GROWTH; NEUROSPORA-CRASSA; FUNGAL HYPHAE; FREEZE-SUBSTITUTION; NUCLEAR MIGRATION; CELL-DIVISION; MORPHOGENESIS; MICROTUBULES; SPITZENKORPER SO - Protoplasma 2003 ;222(3-4):211-215 9288 UI - 7303 AU - Ristich M AU - Brankovich G AU - Srechkovich T AU - Vlasova M AU - Kakazei M AU - Domingez-Patino ML AU - Domingez-Patino GF AU - Timofeeva II AU - Isaeva LP AD - Serbian Acad Sci & Art, Joint Lab Adv Mat, Belgrade, YugoslaviaUniv Autonoma Estado Morelos, Cuernavaca 62210, Morelos, MexicoNatl Acad Sci Ukraine, Frantsevich Inst Mat Sci Problems, UA-03142 Kiev, UkraineRistich, M, Serbian Acad Sci & Art, Joint Lab Adv Mat, Belgrade, Yugoslavia TI - Fabrication of CdO-Bi2O3 ceramics AB - The phase formation in the CdO-rich part (less than or equal to10 wt % Bi2O3) of the CdO-Bi2O3 system was studied by x-ray diffraction, IR spectroscopy, electron microscopy, and other techniques. The results indicate that the Orindino of the starting powder mixtures in a planetary mill leads to an inhomogeneous Bi2O3 distribution and a high defect density in the CdO and Bi2O3 particles. Sintering in the range 910-990 K gives rise to the formation of the gamma(h) phase, whose content depends strongly on the mixture composition and sintering conditions. At sintering temperatures above its melting point, the gamma(h) phase acts as a binder of CdO grains MH - Mexico|Morelos MH - Ukraine MH - Yugoslavia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0020-1685 UR - ISI:000185863800019 L2 - BI2O3-CDO; SYSTEM SO - Inorganic Materials 2003 ;39(9):988-995 9289 UI - 6425 AU - Ritter GX AU - Iancu L AU - Urcid G AD - Univ Florida, CISE Dept, Gainesville, FL 32611, USA. INAOE, Opt Dept, Puebla 72000, Mexico TI - Neurons, dendrites, and pattern classification AB - Computation in. a neuron of a traditional neural network is accomplished by summing the products of neural values and connection weights of all the neurons in the network connected to it. The new state of the neuron is then obtained by an activation function which sets the state to either zero or one, depending on the computed value. We provide an alternative way of computation in an artificial neuron based on lattice algebra and dendritic computation. The neurons of the proposed model bear a close resemblance to the morphology of biological neurons and mimic some of their behavior. The computational and pattern recognition capabilities of this model are explored by means of illustrative examples and detailed discussion MH - Mexico|Puebla MH - USA T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleritter@cise.ufl.edu Iiancu@cise.ufl.edu gurcid@inaoep.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY19C AV - English IS - 0302-9743 UR - ISI:000188097600001 SO - 2003 ;():1-16 9290 UI - 7973 AU - Ritter GX AU - Urcid G AU - Iancu L AD - Univ Florida, Ctr Comp Vis & Visualizat, Gainesville, FL 32611, USAINAOE, Dept Opt, Tonantzintla 72000, Pue, MexicoRitter, GX, Univ Florida, Ctr Comp Vis & Visualizat, Gainesville, FL 32611 USA TI - Reconstruction of patterns from noisy inputs using morphological associative memories AB - Morphological neural networks are based on a new paradigm for neural computing. Instead of adding the products of neural values and corresponding synaptic weights, the basic neural computation in a morphological neuron takes the maximum or minimum of the sums of neural values and their corresponding synaptic weights. By taking the maximum (or minimum) of sums instead of the sum of products, morphological neuron computation is nonlinear before thresholding. As a consequence, the properties of morphological neural networks are drastically different than those of traditional neural network models. In this paper we restrict our attention to morphological associative memories. After a brief review of morphological neural computing and a short discussion about the properties of morphological associative memories, we present new methodologies and associated theorems for retrieving complete stored patterns from noisy or incomplete patterns using morphological associative memories. These methodologies are derived from the notions of morphological independence, strong independence, minimal representations of patterns vectors, and kernels. Several examples are provided in order to illuminate these novel concepts MH - USA MH - Mexico|Puebla PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Artificial Intelligence;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0924-9907 UR - ISI:000184123400003 L2 - associative memories;minimal pattern representations;morphological associative memories;morphological independence;morphological strong independence;kernels;non-boolean patterns;NEURAL NETWORKS; MODEL SO - Journal of Mathematical Imaging and Vision 2003 ;19(2):95-111 9291 UI - 8874 AU - Ritter GX AU - Urcid G AD - Univ Florida, CISE Dept, Gainesville, FL 32611, USAINAOE, Dept Opt, Tonantzintla 72000, Pue, MexicoRitter, GX, Univ Florida, CISE Dept, Gainesville, FL 32611, USA TI - Lattice algebra approach to single-neuron computation AB - Recent advances in the biophysics of computation and neurocomputing models have brought to the foreground the importance of dendritic structures in a single neuron cell. Dendritic structures are now viewed as the primary autonomous computational units capable of realizing logical operations. By changing the classic simplified model of a single neuron with a more realistic one that incorporates the dendritic processes, a novel paradigm in artificial neural networks is being established. In this work, we introduce and develop a mathematical model of dendrite computation in a morphological neuron based on lattice algebra. The computational capabilities of this enriched neuron model are demonstrated by means of several illustrative examples and by proving that any single layer morphological perceptron endowed with dendrites and their corresponding input and output synaptic processes is able to approximate any compact region in higher dimensional Euclidean space to within any desired degree of, accuracy. Based on this result, we describe a training algorithm for single layer morphological perceptions and apply it to some well-known nonlinear problems in order to exhibit its performance MH - Mexico|Puebla MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 10 U4 - Computer Science, Artificial Intelligence;Computer Science, Hardware & Architecture;Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1045-9227 UR - ISI:000181820400004 L2 - artificial neural networks;dendrite computation;lattice algebra;morphological neural networks;perceptron training;single-neuron computation;MORPHOLOGICAL ASSOCIATIVE MEMORIES; NETWORKS SO - Ieee Transactions on Neural Networks 2003 ;14(2):282-295 9292 UI - 8653 AU - Rivas-Arancibia S AU - Dorado-Martinez C AU - Colin-Barenque L AU - Kendrick KM AU - de la Riva C AU - Guevara-Guzman R AD - Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoBabraham Inst, Dept Neurobiol, Cambridge CB2 4AT, EnglandRivas-Arancibia, S, Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, AP 70-250, Mexico City 04510, DF, Mexico TI - Effect of acute ozone exposure on locomotor behavior and striatal function AB - Ozone exposure, depending on the dose, is a noninvasive model of oxidative stress. The purpose of this work was to study striatal damage and cell death induced by oxidative stress. Sixty-three male Wistar rats were divided into two groups-Group 1: animals were exposed to an air stream free of ozone for 4 h; and Group 2: animals were exposed to I ppm of ozone for 4 h. Four subgroups in each treatment group were then tested 3 h after control or ozone exposure for: (1) exploratory and freezing behavior; (2) lipid peroxidation levels; (3) in vivo release of amino acid and monoamine transmitters, and metabolites and nitric oxide; and (4) striatal ultrastructural changes. Results showed that the ozone decreased exploratory and increased freezing behaviors. It also increased striatal lipoperoxidation levels and basal dopamine, glutamate, and nitric oxide (arginine, citrulline, and nitrate used as indices) concentrations and decreased those of 5-HT. Concentrations of GABA were initially decreased 3 It after ozone but then were increased 3 and 5 days afterwards. Increased lipofucsine, neuronal cytoplasm and dendrite vacuolation, and dilation of rough endoplasmic reticulum cisterns and dark cells were observed in striatal medium spiny neurons in ozone-exposed rats. These alterations suggest a neurodegenerative process caused by oxidative stress after acute ozone exposure. (C) 2003 Elsevier Science Inc. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Behavioral Sciences;Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0091-3057 UR - ISI:000182222900014 L2 - striatum;oxidative stress;dopamine;behavior;ultrastructure;microdialysis;LIPID-PEROXIDATION LEVELS; GAMMA-AMINOBUTYRIC-ACID; OXIDATIVE STRESS MODEL; NITRIC-OXIDE; CLASSICAL TRANSMITTERS; CYTOLOGICAL CHANGES; GLUTAMATE TOXICITY; NERVOUS-SYSTEM; OLFACTORY-BULB; FREE-RADICALS SO - Pharmacology Biochemistry and Behavior 2003 ;74(4):891-900 9293 UI - 8046 AU - Rivas-Silva JF AU - Flores-Riveros A AU - Berrondo M AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoBrigham Young Univ, Dept Phys & Astron, Provo, UT 84602, USARivas-Silva, JF, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - DFT study of 1-D Li6Gd(BO3)(3) AB - Solid-state calculations were performed with the program CASTEP to analyze some electronic structure features of the crystal compound Li6Gd(BO3)(3) (LIGDBO), which is known to be an efficient gamma radiation detector, in particular when doped with rare-earth ions. The structure of this material displays a clear I-D preference, where chains of atoms are formed along one of the crystalline axes. These quasilinear chains are responsible for the energy transfer occurring in the system prior to the actual detection. To elucidate on some aspects of the former process, calculations based on a few cluster models were also carried out by means of the molecular program JAGUAR. One of our results corresponds to a theoretical absorption energy value close to that experimentally obtained. In our calculation, the absorption process seems to be associated with the formation of an excitonic magnon state. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Puebla MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000183943900005 L2 - Li6Gd(BO3)(3);absorption process;solid-state calculations;magnon bands;DENSITY; APPROXIMATION SO - International Journal of Quantum Chemistry 2003 ;94(2):105-112 9294 UI - 4305 AU - Rivera-Arce E AU - Gattuso M AU - Lozoya X AD - IMSS, Natl Med Ctr Siglo 21, Res Unit Neurol Dis, Lab Med Plants, Mexico City, DF, MexicoUniv Nacl Rosario, Fac Biochem & Pharmaceut Sci, Santa Fe, ArgentinaLozoya, X, IMSS, Natl Med Ctr Siglo 21, Res Unit Neurol Dis, Lab Med Plants, Av Cuauhtemoc 330,Col Doctores A-047, Mexico City, DF, Mexico TI - Anatomical identity parameters of the crude drug Psidii guajavae folium AB - The leaves of Psidii guajavae L. (Myrtaceae) (Guava) are popularly used in tropical countries to prepare a remedy for the treatment of patients suffering of liquid stools; this traditional use is now scientifically supported by the existence in the leaf of a group of quercetin-derived flavonoids with intestinal anti-motility, spasmolytic and anti-inflammatory properties. Consequently, herbal products prepared with Psidii guajavae folium are now clinically used to treat Acute Diarrheic Disease and some are commercialized as phytodrugs. However, there are no studies on morphology of this plant drug, particularly to determine the anatomical characters required for quality control of the raw material used in the preparation of guava-leaf phytodrugs. The present paper provides the anatomical and morphological characters that help in the authentication of Psidii guajavae leaf. Guava leaf surfaces were dissected and stained with cresyle-violet; transversal cuttings of the lamina and petiole were stained using safranine-fast green; samples were studied using procedures of light, scanning-electron and laser-scanning confocal microscopy. Anomocytic and anisocytic stomatas in the abaxial epidermis, long unicellular trichomes and schizolysigenous secretory cavities are proposed as anatomical parameters to establish authenticity of guava leaf crude drug MH - Argentina MH - Mexico|Distrito Federal PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Medical Laboratory Technology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1388-0209 UR - ISI:000224247500010 L2 - crude plant drugs;Myrtaceae;Phytodrugs;Psidii guajavae L. SO - Pharmaceutical Biology 2003 ;41(7):516-521 9295 UI - 7238 AU - Rivera-Gutierrez S AU - Montoro-Cardoso E AU - Valdivia JA AU - Cox RA AU - Merchand JA AD - IPN, Dept Microbiol, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoInst Med Trop Pedro Kouri, Havana, CubaNatl Inst Med Res, Div Mycobacterial Res, London NW7 1AA, EnglandGonzalez-y-Merchand, JA, IPN, Dept Microbiol, Escuela Nacl Ciencias Biol, Prolongac Carpio & Plan Ayala S-N,Col Santo Tomas, Mexico City 11340, DF, Mexico TI - The number and organization of the rRNA genes of several strains of Mycobacterium simiae AB - The type strain of Mycobacterium simiae and four Cuban strains, each representing a group of variants sharing a characteristic pattern of glycopeptidolipids, were investigated. Each of the five strains was found to have a single rRNA (rrn) operon per genome. Each rrn operon was found to be located downstream from murA. Unusually for slow-growing mycobacteria, three transcription start points were identified for each operon. Gene sequences were established extending from near to the 3'-ends of murA, the intergenic regions and the 5'-ends of the 16S rDNAs. Characteristic strain differences were identified. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000186016400019 L2 - rRNA operon;transcription start point;strain difference;Mycobacterium simiae;EXPERIMENTAL TUBERCULOSIS; HABANA; INFECTION; SEQUENCE; IDENTIFICATION; PROMOTER; OPERON SO - Fems Microbiology Letters 2003 ;227(1):133-139 9296 UI - 9308 AU - Rivera-Munos ER AU - Lardizabal D AU - Alonso G AU - Aguilar A AU - Siadati MH AU - Chianelli RR AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAUniv Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, MexicoCtr Invest Mat Avanzados, Chihuahua 31109, MexicoRivera-Munos, ER, Univ Texas, Dept Chem, El Paso, TX 79968, USA TI - Silica gel- and MCM-41-supported MoS2 catalysts for HDS reactions AB - MCM-41- and silica gel-supported MoS2 catalysts were prepared. MCM-41 was synthesized and impregnated with precursor, then activated to obtain the active phase. The sol gel method was used for providing the SiO2 support as well as for including the catalyst precursors in one single step of preparation. Such catalysts have applications particularly in hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) processes. A comparison of the activities of the catalysts was made. The catalytic activity results showed the method of preparation used in this study was successful in producing very efficient catalysts for the HDS of dibenzothiophene (DBT). A higher selectivity for direct C-S bond cleavage was observed for the MoS2 catalyst supported on SiO2 by the sol gel method. X-ray diffraction studies showed that the catalysts were poorly crystallized with a very weak intensity of the (002) line of 2H-MoS2 MH - Mexico|Chihuahua MH - Mexico|Queretaro MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000180652000003 L2 - MoS2;catalysts;MCM-41;sol-gel;HDS reaction;TUNGSTEN SULFIDE CATALYSTS; IN-SITU DECOMPOSITION; TETRAALKYLAMMONIUM THIOMOLYBDATES; OXYGEN; SURFACE; HYDRODESULFURIZATION; HYDROGENATION; PRETREATMENT; ALKANES; CARBIDE SO - Catalysis Letters 2003 ;85(3-4):147-151 9297 UI - 7606 AU - Rivera-Navarro J AU - Morales-Gonzalez J AU - ito-Leon J AD - Univ Veracruzana, Fac Social Work, Minatitlan, Veracruz, MexicoMinist Labor & Social Affairs, Dept Res, Madrid, SpainMostoles Gen Hosp, Dept Neurol, Madrid, SpainRivera-Navarro, J, Univ Veracruzana, Fac Trabajo Social, Campus Minaatitlan,C Atenas & Manague S-N,Colonia, Minaatitlan 96760, Veracruz, Mexico TI - Informal caregiving in multiple sclerosis patients: data from the Madrid demyelinating disease group study AB - Purpose: To describe the pro. le of Multiple Sclerosis ( MS) patient caregivers and assess their caregiving burden. Methods: A total of 91 MS patients, recruited from a Spanish longitudinal survey, and their corresponding caregivers were studied. Caregivers were administered a questionnaire that collected social and demographic data, and a generic caregiver burden interview ( the Zarit scale). Furthermore, MS patients were administered a specific health-related quality of life (HRQoL) instrument (the modified Spanish version of the Functional Assessment of Multiple Sclerosis). Results: 24.5% of the sample required caregivers to perform activities of daily life. Caregiver pro. le was as follows: 67% female; mean age, 51.5 +/- 14.1 years; and mean daily time devoted to care, 11.5 +/- 8.2 h. Most caregivers had some type of support, 67% informal and 31.9% formal. The amount of time spent in caring for relatives was the main item determining the burden of MS-patient caregivers. Moreover, MS patient's HRQoL showed a moderate inverse correlation with caregiver burden. Conclusions: In contrast to previous studies, most Spanish MS-patient caregivers are female, and there is a considerable percentage of parent caregivers. A greater degree of formal support and an improvement in MS patients' HRQoL may serve to reduce caregiver burden MH - Mexico|Veracruz MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Rehabilitation U5 - J;Article AV - English IS - 1464-5165 UR - ISI:000184982400006 L2 - QUALITY-OF-LIFE; FAMILY CAREGIVERS; NORTHERN SPAIN; DEMENTIA; HEALTH; BURDEN; IMPACT; RELATIVES; REGION; POPULATION SO - Disability and Rehabilitation 2003 ;25(18):1057-1064 9298 UI - 8630 AU - Rivera CA AU - Messina AR AU - Olguin D AU - Ruiz D AD - IPN, CINVESTAV, Guadalajara 44550, Jalisco, MexicoUniv Autonoma Metropolitana, Mexico City, DF, MexicoInst Politecn Nacl, Mexico City, DF, MexicoUniv Liege, Dept Elect Engn, Liege, BelgiumMessina, AR, IPN, CINVESTAV, POB 31-438,Plaza La Luna, Guadalajara 44550, Jalisco, Mexico TI - Analysis of subsynchronous torsional interactions with SVCs AB - This paper presents the results of an analytical investigation aimed at assessing the potential for subsynchronous torsional interactions (SSTIs) between turbine-generator rotors and static VAR compensators (SVCs) in longitudinal power systems. An advanced linear state model of the power system is developed that allows detailed evaluation of the impact of FACTS controllers on SSTIs with turbine generators, as well as the identification of potentially undesirable effects associated with the application of multiple controllers. This approach is general enough to include the representation of complex systems and can be used in conjunction with efficient techniques for the analysis of large sparse linear systems. The proposed methodology is applied to quantify the potential for subsynchronous resonance (SSR) problems with series-compensated ac transmission lines and the study of SSTIs between a large SVC and major nuclear and thermal turbine-generator units in the Mexican interconnected system MH - Belgium MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1532-5008 UR - ISI:000182464100004 L2 - FACTS devices;static VAR compensator;subsynchronous resonance;subsynchronous oscillation;small signal analysis;STATIC VAR COMPENSATORS; HVDC SO - Electric Power Components and Systems 2003 ;31(5):467-481 9299 UI - 7025 AU - Rivera I AU - Roca A AU - Patino F AU - Cruells M AD - Univ Autonoma Estado Hidalgo, Ctr Invest Met & Mat, Pachuca, Hidalgo, MexicoUniv Barcelona, Dept Ingn Quim & Met, Barcelona, SpainRivera, I, Univ Autonoma Estado Hidalgo, Ctr Invest Met & Mat, Pachuca, Hidalgo, Mexico TI - Microalloyed niobium influence on ductile ferrite cast irons AB - The main objective of this work is the study of the Niobium influence over the microstructure and mechanical properties of as cast ductile iron. In this research 8 heats were made in an induction furnace, with the following composition 3.4-3.6 %C and 2.3-2.5 % Si, using different Nb content between 0.012 and 0.366%. The results show that the phases ferrite and pearlite have contents of 76-64% and 6-15% respectively. The niobium content not affected the nodularity %, nodules per square millimeter and grain size. Mechanical properties such as hardness, yield strength, and ultimate tensile strength increases with Nb content. This is due to the increase of pearlite content and the Nb content in ferrite phase. Particles of niobium carbide were detected by SEM-EDS. They increased in amount and size with the Nb content. These particles are stable at 1100degreesC and was not possible their dissolution during one hour at that temperature MH - Mexico|Hidalgo MH - Spain PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1364-0461 UR - ISI:000186431800013 L2 - microalloyed niobium;microstructure;mechanical properties;polygonal particles;NITROGEN SO - International Journal of Cast Metals Research 2003 ;16(1-3):65-70 9300 UI - 7732 AU - Rivera JHV AU - Mcshea WJ AU - Rappole JH AD - Conservat & Res Ctr, Front Royal, VA 24060, USARivera, JHV, UNAM, Inst Biol, Estac Biol Chamela, Apartado Postal 21, San Patricio 22630, Jalisco, Mexico TI - Comparison of breeding and postbreeding movements and habitat requirements for the Scarlet Tanager (Piranga olivacea) in Virginia AB - We investigated movements and habitat use during breeding and postbreeding periods in Scarlet Tanagers (Piranga olivacea) during June-September 1998 in northern Virginia deciduous forest. Nine birds (8 males and 1 female) remained on the same home range during both breeding and postbreeding periods, whereas 11 birds (9 males and 2 females) shifted home range (>300 m) between periods. Breeding season home-range size ranged from 2.6 to 5.6 ha (95% kernel), and core area from 0.61 to 0.93 ha (50% kernel). Postbreeding home ranges were similar in size to home range during the breeding period for birds that remained in the vicinity of nesting areas, but were larger for birds that moved away from the nesting area. Scarlet Tanagers occurred in both mature and successional forest during breeding and postbreeding periods, with some indication of increased use of earlier successional stages during the postbreeding period. Needs for Scarlet Tanagers during the postbreeding period (molt, premigratory fattening) differ from those during the breeding period (pair formation, nest placement, rearing of young). Those differences provide a plausible explanation that all tanagers changed focal areas between breeding and postbreeding periods. These findings confirm the need for taking the postbreeding period into account, both for understanding migrant life history and successful conservation MH - Mexico|Jalisco MH - USA PB - LAWRENCE: AMER ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 8 U4 - Ornithology U5 - J;Article AV - English IS - 0004-8038 UR - ISI:000184830800006 L2 - SEXUAL DIFFERENCES; WOOD THRUSHES; PREBASIC MOLT; SIZE; ESTIMATORS; PASSERINES; PATTERN; PERIOD; BIRDS SO - Auk 2003 ;120(3):632-644 9301 UI - 8671 AU - Rivera JHV AU - Ayala D AU - Haas CA AD - UNAM, Inst Biol, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoUNAM, Fac Ciencias, Mexico City, DF, MexicoVirginia Polytech Inst & State Univ, Dept Fisheries & Wildlife Sci, Blacksburg, VA 24061, USARivera, JHV, UNAM, Inst Biol, Estac Biol Chamela, AP 21, San Patricio 48980, Jalisco, Mexico TI - Home-range size, habitat use, and reproduction of the Ivory-billed Woodcreeper (Xiphorhynchus flavigaster) in dry forest of western Mexico AB - From March 1999 to August 2000, we used mist-netting, point counts, and radio-tracking to study habitat use, area requirements, and breeding of the Ivory-billed Woodcreeper Xiphorhynchus flavigaster in the tropical deciduous and semi-deciduous forest (arroyo forest) of the Chamela-Cuixmala Biosphere Reserve, western Mexico. The Ivory-billed Woodcreeper was a common, year-round resident. Breeding commenced at the end of the dry season (May) and continued during the rainy season through August. Our observations suggested that only the female builds the nest, incubates, and feeds nestlings. Ivory-billed Woodcreepers commonly foraged alone, but sometimes joined mixed-species flocks that passed through their territories, occasionally following army ant swarms. Home-range size varied from 6-36 ha, although most birds' home range was 15 ha or less. We did not find differences in home range size or mobility between the dry and rainy seasons, and we did not find a correlation between the size of the home range and the extent of semi-deciduous forest it included. We did not find evidence that suggested a greater use of semi-deciduous forest than of dry deciduous forest. We hypothesize that foraging habits and low competition could explain the lack of selection for semi-deciduous forest and the strong site fidelity exhibited by members of this species MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - STATESBORO: ASSOC FIELD ORNITHOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Ornithology U5 - J;Article AV - English IS - 0273-8570 UR - ISI:000182303900006 L2 - Dendrocolaptidae;habitat selection;tropical dry forest;western mexico;Xiphorhynchus flavigaster;TROPICAL DECIDUOUS FOREST; RESOURCE AVAILABILITY; JALISCO; SEASONALITY; PASSERINES; DIVERSITY; ECOLOGY; BIRDS SO - Journal of Field Ornithology 2003 ;74(2):141-151 9302 UI - 9137 AU - Rivera JL AU - McCabe C AU - Cummings PT AD - Univ Tennessee, Dept Chem Engn, Knoxville, TN 37996, USAColorado Sch Mines, Dept Chem Engn, Golden, CO 80401, USAUniv Tennessee, Dept Chem Chem Engn & CoOmp Sci, Knoxville, TN 37996, USAOak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831, USARivera, JL, Univ Michoacana, Fac Ingn Quim, Morelia 58060, Michoacan, Mexico TI - Molecular simulations of liquid-liquid interfacial properties: Water-n-alkane and water-methanol-n-alkane systems AB - Direct molecular dynamics simulations of the liquid-liquid interface of water-n-alkane and water-methanol-n-alkane systems have been performed in order to study the interfacial properties of these systems. The simulations were carried out using the NERD revised force field of Nath for the n-alkanes, the simple point charge extended model for water, and the optimized potential for liquid simulations model for methanol. In order to validate the model employed in this work for the n-alkanes we calculated the coexisting densities, surface tension, and thickness of the interface for pure n-pentane. For all the systems studied the interfacial tension and thickness were calculated at 298.15 K. Our results show that, by adjusting the number of molecules to reproduce the liquid densities in the direct simulation method of the liquid-liquid interface in multicomponent systems, we are able to reproduce available experimental data for interfacial tension. The interfacial thickness is underpredicted and a constant negative deviation of similar to2.5 Angstrom from the experimental data is usually observed. We find that methanol acts like surfactant when it is added to the water-n-alkane mixtures, reducing the interfacial tension of the liquid-liquid ternary system. The interfacial tension results agree quantitatively well for the range of concentrations of methanol studied MH - Mexico|Michoacan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 22 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000181017300039 L2 - X-RAY REFLECTIVITY; LENNARD-JONES FLUIDS; SURFACE-TENSION; COMPUTER-SIMULATION; CAPILLARY WAVES; DYNAMICS SIMULATIONS; HEXANE; EQUILIBRIA; MIXTURES; PENTANE SO - Physical Review e 2003 ;67(1): 9303 UI - 7120 AU - rmas-Hernandez M AU - Hernandez-Hernandez R AU - Alcocer L AU - Reyes AJ AD - Univ Centroccidental L Alvarado, Barquisimeto, VenezuelaGen Hosp, Mexico City, DF, MexicoInst Cardiovasc Theory, Montevideo, Uruguay TI - Improvement in sleep disturbances during treatment with nifedipine GITS MH - Mexico|Distrito Federal MH - Uruguay MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0263-6352 UR - ISI:000184406700225 SO - Journal of Hypertension 2003 ;21():S65-S65 9304 UI - 7123 AU - rmas-Hernandez MJ AU - Hernandez-Hernandez R AU - Alcocer L AU - Reyes AJ AD - Univ Centroaccidental L Alvarado, Barquisimeto, VenezuelaGen Hosp, Mexico City, DF, MexicoInst Cardiovasc Theory, Montevideo, Uruguay TI - Improvement in orthopnoea during treatment with nifedipine GITS MH - Mexico|Distrito Federal MH - Uruguay MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0263-6352 UR - ISI:000184406700651 SO - Journal of Hypertension 2003 ;21():S186-S186 9305 UI - 6796 AU - rmendariz-Borunda J AU - Islas-Carbajal MC AU - Meza E AU - Rincon AR AU - Alvarez A AU - Goodman ZD AU - Sandoval A AU - Covarrubias A AU - Arechiga G AU - Garcia L AD - Univ Guadalajara, OPD Hosp Civil de Guadalajara, Guadalajara 44430, Jalisco, MexicoArmed Forces Inst Pathol, Washington, DC 20306, USAHosp Civil Guadalajara Juan I Menchaca, Guadalajara, Jalisco, Mexico TI - A pilot study of a novel anti-inflammatory and anti-fibrotic agent, pirfenidone, in patients with liver cirrhosis MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 2 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000185816700315 SO - Hepatology 2003 ;38(4):308A-308A 9306 UI - 6799 AU - rmendariz-Borunda J AU - Siller-Lopez F AU - Garcia J AU - Sandoval A AU - Salgado S AU - Salazar A AU - guilar-Cordova E AD - Univ Guadalajara, Guadalajara 44430, Jalisco, MexicoAdvantagene Inc, San Diego, CA, USA TI - Metalloproteinase-8 gene delivery up-regulates MMP-2, MMP-3 and induces cell proliferation in experimental liver cirrhosis MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000185816700888 SO - Hepatology 2003 ;38(4):585A-585A 9307 UI - 8529 AU - rmstrong-Altrin JS AU - Verma SP AU - Madhavaraju J AU - Lee YI AU - Ramasamy S AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Madras, Dept Geol, Madras 600025, Tamil Nadu, IndiaSeoul Natl Univ, Sch Earth & Environm Sci, Seoul 151742, South KoreaArmstrong-Altrin, JS, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Priv Xochicalco S-N,Col Ctr,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemistry of upper Miocene Kudankulam limestones, southern India AB - Concentrations of major, trace, and rare-earth elements (REE) were measured in shallow marine limestone samples of the upper Miocene Kudankulam Formation, southern India, in order to investigate the geochemical variations among various litho-units. The CaCO3 content is higher in algal limestone (AL; 92 +/- 1, n = 3) and elastic limestone (CL; 90 +/- 2, n = 3) than sandy shell limestone (SSL; 81 +/- 1, n = 3). All trace elements exhibit lower concentrations than post-Archean Australian Shale (PAAS) values, except one SSL sample. Large variations in SigmaREE content are observed among CL, SSL, and AL (similar to14-142, similar to68-124, and similar to38-98, respectively). Almost all limestone samples analyzed from the Kudankulam Formation show a small negative cerium anomaly (Ce/Ce* similar to0.8-0.9), except one AL sample, which lacks this cerium anomaly (Ce/Ce* similar to1.04). Variations in Ce anomalies and SigmaREE contents in Kudankulam limestone samples are mainly controlled by the amount of terrigenous sediments and diagenetic behavior. Shale-normalized REE patterns and (La/ Yb)(s), La/Sc, La/Th, and Th/Sc ratios suggest that the detrital sediments present in the limestones were probably derived from felsic source rocks. The observed low content of U (0.9 +/- 0.5, n = 9) and U/Th (0.2 +/- 0.1, n = 9) ratio in these limestones are probably related to an oxygen-rich environment MH - India MH - Mexico|Morelos MH - South Korea PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 3 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000182761500002 L2 - RARE-EARTH ELEMENTS; TAMIL-NADU; SEDIMENTARY PROCESSES; ISOTOPIC COMPOSITION; CLASTIC SEDIMENTS; MARINE-SEDIMENTS; SEA SEDIMENTS; PORE WATERS; OCEAN; URANIUM SO - International Geology Review 2003 ;45(1):16-26 9308 UI - 7498 AU - rnaud-Haond S AU - Monteforte M AU - Blanc F AU - Bonhomme F AD - SMEL, F-34200 Sete, FranceUniv Montpellier 2, CNRS, UMR 5000, IFREMER, F-34095 Montpellier 5, FranceCtr Invest Biol Noroeste SC, La Paz, BCS, MexicoUniv Montpellier 3, Lab Zoogeog, F-34032 Montpellier, FranceArnaud-Haond, S, SMEL, 1 Quai Daurade, F-34200 Sete, France TI - Evidence for male-biased effective sex ratio and recent step-by-step colonization in the bivalve Pinctada mazatlanica AB - This paper presents a comparison of the geographical distribution of genetic variability at mitochondrial and nuclear loci among pearl oyster populations from the tropical American Pacific coast (Pinctada mazatlanica). Surprisingly, both mitochondrial and nuclear gene variability decreased regularly from north to south of the studied area, which, altogether with a significant correlation between genetic and geographical distances for mtDNA, suggests a recent colonization or re-colonization of the southern areas. However, the loss of diversity between north and south was much more important for mitochondrial than for nuclear DNA, and this did not translate into measurable fixation index at nuclear loci ((θ) over cap = 0.03, n.s.), contrary to the mitochondrial data ((θ) over cap = 0.18*). Smaller effective size of mtDNA accentuated by a strong male-biased effective, sex ratio and step-by-step colonization from northern areas can explain this discrepancy among natural populations of this protandric species MH - France MH - Mexico|Baja California Sur PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1010-061X UR - ISI:000185203300002 L2 - bivalve;colonization;genetic structure;mtDNA;nDNA;sex ratio;MITOCHONDRIAL-DNA MARKERS; HERRING CLUPEA-HARENGUS; PTERIA-STERNA BIVALVIA; POPULATION-STRUCTURE; GENE FLOW; HETEROZYGOTE DEFICIENCY; CRASSOSTREA-GIGAS; BAJA-CALIFORNIA; F-STATISTICS; LA-PAZ SO - Journal of Evolutionary Biology 2003 ;16(5):790-796 9309 UI - 6270 AU - Roberts TL AU - Obrador GT AU - Peter WLS AU - Pereira BJG AU - Collins AJ AD - Minneapolis Med Res Fdn Inc, Nephrol Analyt Serv, Minneapolis, MN, USATufts New England Med Ctr, Boston, MA, USAUniv Panamericana Sch Med, Mexico City, DF, MexicoUniv Minnesota, Minneapolis, MN, USA TI - Relationship among vascular access insertions, infections, and anemia management among hemodialysis patients MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219103274 SO - Journal of the American Society of Nephrology 2003 ;14():710A-710A 9310 UI - 9327 AU - Rocha-Garcia A AU - Del Rio AA AU - Hernandez-Pena P AU - Martinez-Garcia MD AU - Marin-Palomares T AU - Lazcano-Ponce E AD - Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62508, Morelos, MexicoIMSS, Ctr Med Nacl Sigio XXI, Med Res Coordinat, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoWHO, CH-1211 Geneva, SwitzerlandLazcano-Ponce, E, Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Avenida Univ 655,Colonia Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - The emotional response of families to children with leukemia at the lower socio-economic level in central Mexico: A preliminary report AB - Little research has been done in developing countries on the emotional impact experienced by families who have a child diagnosed with leukemia. This preliminary study looked at parents in Mexico who had to cope with their child's leukemia in the face of meager financial and social resources. The 51 children in the study were under 15 years and being treated for leukemia in hospitals affiliated with the Mexican Social Security Institute (IMSS) where their parents were interviewed using a questionnaire to ascertain their emotional responses to the illness. The data are analyzed and reported in five domains: perceived illness, psychological impact, coping strategies, family relationships; socio-economic impact. A strengthening of family bonds was found the most common response (82.4%). The second most common responses were concern for the expenses incurred by the illness and the time dedicated to caring for the sick child (both 78.4%). It is especially important to assess families with meager social and financial resources as to their emotional responses to life-threatening illness because these limitations impose greater burdens and make coping more difficult. Psychosocial interventions are key to ensuring adequate treatment of the child in these circumstances. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Switzerland PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Oncology;Psychology;Psychology, Multidisciplinary;Social Sciences, Biomedical U5 - J;Article AV - English IS - 1057-9249 UR - ISI:000180607600007 L2 - CANCER-PATIENTS; PARENTS; SUPPORT SO - Psycho-Oncology 2003 ;12(1):78-90 9311 UI - 6650 AU - Rocha-Olivares A AU - Leal-Navarro RA AU - Kimbrell C AU - Lynn EA AU - Vetter RD AD - Ctr Invest Cient & Educ Super Ensenada, Dept Oceanog Biol, Ensenada 22860, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22860, Baja California, MexicoSW Fisheries Sci Ctr, Natl Ocean & Atmospher Adm, La Jolla, CA 92037, USARocha-Olivares, A, Ctr Invest Cient & Educ Super Ensenada, Dept Oceanog Biol, AP 2732, Ensenada 22860, Baja California, Mexico TI - Microsatellite variation in the Mexican rockfish Sebastes macdonaldi AB - The Mexican rockfish Sebastes macdonaldi is the Northeast Pacific rockfish with the southernmost distribution, featuring isolated populations in the Gulf of California. We analysed seven microsatellite loci in 111 organisms collected throughout most of its geographical range to test long-standing hypotheses regarding its disjunct distribution. One locus was fixed and the number of alleles in polymorphic loci ranged from 2 to 24 (average 13.5). We found very high levels of polymorphism (overall He = 0.75) comparable to other congeneric species but no significant differences in genetic diversity among localities or between Pacific and Gulf of California populations (p > 0.1). Significant shifts in allelic and genotypic frequencies were detected at three loci, which resulted in a small but significant partitioning of genetic variance among California, Baja California and Gulf of California populations (F-ST = 0.007, p = 0.03) and between Gulf and Pacific populations (F-ST = 0.01, p = 0.004). The latter but not the former result was corroborated by analyses of molecular variance (AMOVA) using the number of distinct alleles (F-ST ) and the sum of square differences of allele sizes (R-ST) as Euclidean distances. The evidence argues against contemporary gene flow between the gulf and the Pacific ocean and against an ancient invasion of the gulf with a founder effect. The small level of divergence favours a recent dispersal but a larger data set including DNA sequences amenable to phylogenetic analyses will help to test alternative hypotheses of dispersal versus vicariance MH - Mexico|Baja California MH - USA PB - BARCELONA: INST CIENCIAS MAR BARCELONA RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0214-8358 UR - ISI:000187353600008 L2 - Mexican rockfish;disjunct distribution;microsatellites;genetic structure;Baja California;Mexico;MITOCHONDRIAL CYTOCHROME-B; SANTA-BARBARA CHANNEL; 7 OIL PLATFORMS; POPULATION-STRUCTURE; SUBGENUS SEBASTOMUS; FISH ASSEMBLAGES; GENUS SEBASTES; SCORPAENIDAE; LOCI; TELEOSTEI SO - Scientia Marina 2003 ;67(4):451-460 9312 UI - 5862 AU - Rocha-Rangel E AU - Becher PF AU - Lara-Curzio E AD - UAMA, Dept Mat, Mexico City 02200, DF, Mexico. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831, USA TI - Reactive-wetting of alumina by molten aluminum alloys AB - Sessile drop experiments of molten Al, Al-2.5 at. %La and Al-3 at. %Y alloys on alumina were conducted in vacuum (10(-4) to 10(-5) Pa) at 1300degreesC to obtain the time-dependent contact angles as a function of time. In all cases, it was found that the magnitude of the contact angle decreased with time. With the addition of lanthanum or yttrium, the final contact angle reached 57 and 69 degrees, respectively, at times longer than 4500 seconds, whereas for pure Al the final contact angle for the same conditions was 82 degrees. After removal of the metallic droplet from the substrate, observations of the interfacial region by scanning electron microscopy revealed a series of rings formed on the surface of the alumina substrate. Considering the high negative values of the free energy of formation of lanthanum. and yttrium oxides, the presence of these rings suggests reactive-wetting taking place between the aluminum alloys and alumina MH - Mexico|Distrito Federal MH - USA T3 - ADVANCED STRUCTURAL MATERIALSMaterials science forum PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article NT - SEnglishArticle1BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLANDMATER SCI FORUMBY71B AV - English IS - 0255-5476 UR - ISI:000189444600015 L2 - alumina;molten aluminum alloys;reactive-wetting SO - 2003 ;():97-102 9313 UI - 9062 AU - Rocha-Rangel E AU - Becher PF AU - Lara-Curzio E AD - Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831, USAUAM A, Dept Mat, Mexico City 02200, DF, MexicoLara-Curzio, E, Oak Ridge Natl Lab, Div Met & Ceram, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA TI - Influence of carbon on the interfacial contact angle between alumina and liquid aluminum AB - The wetting of alumina by pure liquid aluminum was investigated over the temperature range 900-1300degreesC by the sessile drop method under a dynamic vacuum of 10(-4) -10(-5) Pa. When the substrate is carbon coated, the terminal contact angle is reduced to 40degrees at 1300degreesC for times longer than 4500 s. In the absence of carbon, the final angle is 82degrees for the same conditions. Reactive wetting is suggested by the observation of undercutting of the substrate and ridge formation at the leading edge of the liquid aluminum in all carbon-coated samples. Based on energy considerations, the following is among the thermodynamically favorable reactions: 4Al + 3C --> Al4C3. Possible mechanisms for the observed carbon-enhanced wettability in the system are discussed. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0142-2421 UR - ISI:000181212600006 L2 - carbon;interfacial;contact angle;alumina;aluminum;METAL-MATRIX COMPOSITES; CERAMIC SYSTEMS; SURFACE-TENSION; WETTABILITY; CHEMISTRY; DYNAMICS; SAPPHIRE; SILICON; ALLOYS SO - Surface and Interface Analysis 2003 ;35(2):151-155 9314 UI - 7669 AU - Rocha G AU - Castillo JM AU - Sanchez-Thorin JC AU - Johnston J AU - Cartagena RG AD - Univ Manitoba, Brandon Reg Hlth Ctr, Brandon, MB, CanadaUniv Ottawa, Inst Eye, Ottawa, ON, CanadaHosp San Jose Monterrey ITESM, Dept Ophthalmol, Monterrey, MexicoFdn Santa Fe Bogota, Dept Ophthalmol, Bogota, ColombiaBrandon Univ, Dept Sci, Brandon, MB, CanadaRocha, G, GRMC Vis Ctr, Suite 20,Med Ctr Bldg,144-6th St, Brandon, MB R7A 3N2, Canada TI - Two-year follow-up of noncontact holmium laser thermokeratoplasty for the correction of low hyperopia AB - Purpose: To summarize the 2-year results of laser thermal keratoplasty with a holmium:yttrium-aluminum-garnet (Ho:YAG) laser and the Sunrise Corneal Shaping System and assess the procedure's safety, efficacy and predictability in correcting hyperopia in a phase III clinical intervention case series. Methods: The Ho:YAG laser was used to correct low hyperopia (manifest spherical equivalent of +0.75 to +2.50 dioptres [D], with manifest cylinder of 1.00 D or less) in 38 eyes of 28 patients 40 years of age or older. Laser pulses were delivered to the cornea in 2 radially placed, concentric, 8-spot rings 6.0 and 7.0 mm in diameter. The last follow-up was at 2 years. Results: The preoperative uncorrected visual acuity (UCVA) at distance was less than 20/40 in 82% of the eyes and at near was less than 20/32 in 42%. At 2 years the distance UCVA was 20/40 or better in 100% of the eyes and 20/20 or better in 84%, and the near UCVA was 20/32 or better in 97% of the eyes and 20/20 or better in 8%. The difference between the preoperative and postoperative UCVA was statistically significant (p < 0.01). The correction at 2 years was within 0.50 D of that intended in 92% of the eyes and within 1.00 D in 100%. The reduction in mean spherical equivalent at 2 years was statistically significant (p < 0.0001). No loss of 2 lines or more in best-corrected visual acuity occurred after the 1 st month of follow-up. Interpretation: The Ho:YAG Sunrise Corneal Shaping System is safe and effective for the treatment of low hyperopia and astigmatism. It provides a predictable refractive outcome at 2 years of follow-up. However, our results show a tendency towards regression by 2 years MH - Canada MH - Colombia MH - Mexico|Nuevo Leon PB - OTTAWA: CANADIAN OPHTHAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Ophthalmology U5 - J;Article AV - English IS - 0008-4182 UR - ISI:000184847100008 L2 - hyperopia;holmium : YAG laser;holmium laser thermokeratoplasty;keratomileusis;THERMAL KERATOPLASTY SO - Canadian Journal of Ophthalmology-Journal Canadien D Ophtalmologie 2003 ;38(5):385-392 9315 UI - 8128 AU - Rocha L AU - Maidment NT AD - IPN, Dept Farmacobiol, CINVESTAV, Mexico City 14330, DF, MexicoUniv Calif Los Angeles, Inst Neuropsychiat, Dept Psychiat & Biobehav Sci, Los Angeles, CA 90024, USARocha, L, IPN, Dept Farmacobiol, CINVESTAV, Calz Tenorios 25,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Opioid peptide release in the rat hippocampus after kainic acid-induced status epilepticus AB - It has been suggested that kainic acid enhances opioid peptide release. However, no direct evidence exists to support this hypothesis. The main aim of the present study was to determine whether such release occurs in the hippocampus of the rat after status epilepticus induced by kainic acid. Microdialysis experiments revealed significant opioid peptide release in the hippocampus 90-150 min (100%) and 270-300 min (50%) after kainic acid-induced status epilepticus. The peptides released were identified by high-performance liquid chromatography linked to radioimmunoassay as Met-enkephalin, Leu-enkephalin, Dynorphin-A (1-6), and Dynorphin-A (1-8). Reduced extracellular opioid peptide immunoreactivity was detected 28 days after status epilepticus (38% compared with control situation). The present results indicate an important activation of opioid peptide systems by kainic acid-induced status epilepticus. In addition, the reduced hippocampal extracellular opioid peptide levels long-term after kainic acid administration could have important implications for the progressive nature of epileptogenesis MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 1050-9631 UR - ISI:000183771200005 L2 - microdialysis;seizures;neurotoxocity;enkephalins;dynorphins;NMDA RECEPTOR CHANNELS; GYRUS GRANULE CELLS; DENTATE GYRUS; PYRAMIDAL NEURONS; INDUCED SEIZURES; MESSENGER-RNA; MOSSY FIBERS; DYNORPHIN; ENKEPHALIN; BRAIN SO - Hippocampus 2003 ;13(4):472-480 9316 UI - 6896 AU - Rocher AB AU - Chapon F AU - Blaizot X AU - Baron JC AU - Chavoix C AD - INSERM, U320, Ctr Cyceron, Caen, FranceUniv Caen, Univ Team Execut & Attent Proc, Caen, FranceUniv Caen, Univ Team Clin & Biol Studies Cytoskeletal Myopat, Caen, FranceUniv Cambridge, Dept Neurol, Cambridge, EnglandChavoix, C, CHU Caen, Serv Neurol Dejerine, Equipe Univ, Univ Basse Normandie, Mexico City 14000, DF, Mexico TI - Resting-state brain glucose utilization as measured by PET is directly related to regional synaptophysin levels: a study in baboons AB - It is classically recognized that regional cerebral glucose consumption (CMRglc), as measured by positron emission tomography (PET) and [F-18]-2-fluorodeoxyglucose (FDG), is a precise index of the integrated local neuronal activity. However, despite extensive use of the FDG-PET method, the significance of the measured CMRglc has been little addressed so far. In the present study, we aimed for the first time to test whether resting-state CMRglc is directly related to synaptic density. To this end, we investigated in the baboon the relationships between CMRglc and the levels of synaptophysin (SY), a presynaptic protein classically used to assess synaptic density. CMRglc measured in vivo by FDG-PET at the resting-state, and SY levels, assessed postmortem by the Western blot technique, were quantified in seven brain areas of five baboons. By applying these two techniques to the same animals, we found significant positive correlations between CMRglc and SY levels, across all regions and all animals, as well as within individual baboons. These findings strongly support the hypothesis that resting-state CMRglc reflects integrated synaptic activity. (C) 2003 Elsevier Inc. All rights reserved MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences;Neuroimaging;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 1053-8119 UR - ISI:000186723800043 L2 - FDG;PET;CMRglc;synaptophysin;synaptic density;baboon;SYNAPTIC VESICLE PROTEIN; NEUROTRANSMITTER RELEASE; EMISSION-TOMOGRAPHY; NEURONAL-ACTIVITY; MEMBRANE-PROTEIN; GLUTAMATE; GAP-43; METABOLISM; ANTIBODIES; ENERGY SO - Neuroimage 2003 ;20(3):1894-1898 9317 UI - 8086 AU - Rodil SE AU - Muhl S AU - Maca S AU - Ferrari AC AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandRodil, SE, Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N,CU Coyoacan, Mexico City 04510, DF, Mexico TI - Optical gap in carbon nitride films AB - In this paper we study the effect of introducing nitrogen into different carbon networks. Two kinds of carbon nitride films were deposited: (a) Using a DC-magnetron sputtering system sp(2) bonded carbon nitride (a-CN) films were deposited and (b) Using a combination of filtered cathodic vacuum arc and a low-pressure N-2 plasma source, N was introduced into sp(3) carbon networks (ta-C), leading to the formation of a more dense CN film named ta-CN. For ta-CN films we found that the optical gap initially decreases as the N content and the sp(2) fraction rises, but above a certain N quantity there is a level-off of the value, and the gap then remains constant despite further increases in the fraction and clustering of the sp(2) phase. However, for a-CN films the optical gap increases with the nitrogen content. These two different trends' are not easily explained using the same framework as that for carbon films, in which any decrease in the band gap is associated to an increase in the sp(2) fraction or its clustering. Here we discuss the conditions that lead to high optical gap in sp(2)-bonded carbon nitride samples, which are clearly not associated to the presence of any crystalline super-hard phase. We also compared other differences in properties observed between the two films, such as deposition rate, infrared and Raman spectra. (C) 2003 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 17 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183716900022 L2 - carbon nitride;optical gap;sputtering;cathodic arc;TETRAHEDRAL AMORPHOUS-CARBON; MECHANICAL-PROPERTIES; THIN-FILMS; ELECTRONIC-PROPERTIES; STRUCTURAL-PROPERTIES; RAMAN-SPECTROSCOPY; RESONANCE PLASMA; VAPOR-DEPOSITION; NITROGEN FILMS; RIGID DISKS SO - Thin Solid Films 2003 ;433(1-2):119-125 9318 UI - 8475 AU - Rodil SE AU - Beyer W AU - Robertson J AU - Milne WI AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoKFA Julich GmbH, Forschungszentrum, Inst Photovolta, D-52425 Julich, GermanyUniv Cambridge, Dept Engn, Cambridge CB2 1PZ, EnglandRodil, SE, Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuit Exterior S-N,CU, Mexico City 04510, DF, Mexico TI - Gas evolution studies for structural characterization of hydrogenated carbon nitride samples AB - Gas evolution experiments have been performed on hydrogenated carbon nitride samples in order to study the thermal stability of such samples and to investigate the presence of molecular nitrogen within the samples. The films were deposited by a combination of nitrogen and acetylene as precursor gases using an electron cyclotron wave resonance source. The results show for the release of molecular hydrogen broad effusion transients extending from approximately 300 to 900 T. In addition to H, and hydrocarbons CxHy usually observed for hydrogenated carbon films, there is a significant release of HCN molecules. This effusion also sets in at temperatures near 300 degreesC and shows a broad maximum near 700 degreesC. Above approximately 500 degreesC, for most of the samples the evolution of nitrogen rises steadily with increasing temperature, i.e. the effusion maximum is at temperatures exceeding the temperature range (100-1050 degreesC) investigated. However, in the nitrogen content range from 15 at.% to approximately 25 at.%, a peak near 300 degreesC is also observed. It becomes less pronounced at higher nitrogen content. This peak is probably a consequence of molecular nitrogen that is included in the sample without bonding, in (isolated) voids or bubbles. The implications for film properties, composition and thermal stability are discussed. (C) 2002 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0925-9635 UR - ISI:000182872000131 L2 - carbon nitride;thermal stability;desorption;tetrahedral amorphous carbon;AMORPHOUS-CARBON; THERMAL-STABILITY; THIN-FILMS; DEPOSITION; TRANSPORT; EFFUSION; XPS SO - Diamond and Related Materials 2003 ;12(3-7):921-926 9319 UI - 6633 AU - Rodkina A AU - Nosov V AD - Univ W Indies, Dept Math CSci, Mona, W Ind Assoc StInst Politecn Nacl, SEPI, ESIME, Mexico City, DF, MexicoRodkina, A, Univ W Indies, Dept Math CSci, Kingston-7, Mona, W Ind Assoc St TI - On stability of some nonlinear scalar differential equations AB - Scalar differential equations without linear term, with one or more delays and different nonlinear terms axe considered. Lyapunov-Krasovskii and degenerated functionals techniques axe applied for obtaining sufficient conditions on global and local delay independent and delay dependent asymptotic stability. All stability conditions axe directly expressed in terms of equations coefficients MH - Mexico|Distrito Federal MH - W Ind Assoc St PB - ATLANTA: DYNAMIC PUBLISHERS, INC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1056-2176 UR - ISI:000187427200005 SO - Dynamic Systems and Applications 2003 ;12(3-4):285-294 9320 UI - 8854 AU - Rodriguez-Dagnino RM AU - Takagi H AD - Ctr Elect & Telecomunicaciones, ITESM, Monterrey Inst Technol, Monterrey 64849, NL, MexicoUniv Tsukuba, Inst Policy & Planning Sci, Tsukuba, Ibaraki 3058573, JapanRodriguez-Dagnino, RM, Ctr Elect & Telecomunicaciones, ITESM, Monterrey Inst Technol, Sucursal Correos J, Monterrey 64849, NL, Mexico TI - Counting handovers in a cellular mobile communication. network: equilibrium renewal process approach AB - Knowing the number of handovers that a user makes during a call session is particularly important in cellular mobile communication networks in order to make appropriate dimensioning of virtual circuits for wireless cells. In this paper, we study the probability distributions and statistical moments for the number of handovers per call for a variety of combinations of the call holding time (CHT) and cell residence time (CRT) distributions. Based on the formulation in terms of equilibrium renewal processes, we obtain analytical expressions for the probability mass functions and moments of the handover number distribution. Numerical examples are provided that show a heavy-tail in the handover number distribution when the CHT has heavy-tail. (C) 2002 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Hardware & Architecture;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0166-5316 UR - ISI:000181794600006 L2 - cellular mobile communication networks;multimedia service;handover;call holding-time;cell residence time;renewal theory;equilibrium renewal process;PCS NETWORKS; PERFORMANCE; TIMES SO - Performance Evaluation 2003 ;52(2-3):153-174 9321 UI - 6906 AU - Rodriguez-Gattorno G AU - Santiago-Jacinto P AU - Rendon-Vazquez L AU - Nemeth J AU - Dekany I AU - Diaz D AD - Univ Nacl Autonoma Mexico, Dept Quim Inorgan & Nucl, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Mat Condensada, Inst Fis, Mexico City 04510, DF, MexicoUniv Szeged, Dept Colloid Chem, H-6720 Szeged, HungaryHungarian Acad Sci, Nanostruct Mat Res Grp, H-6720 Szeged, HungaryDiaz, D, Univ Nacl Autonoma Mexico, Dept Quim Inorgan & Nucl, Fac Quim, Mexico City 04510, DF, Mexico TI - Novel synthesis pathway of ZnO nanoparticles from the spontaneous hydrolysis of zinc carboxylate salts AB - A novel and easy synthesis pathway to synthesize small ZnO nanoparticles with a narrow size distribution is reported. The synthesis implies the simple dissolution of a zinc carboxylate hydrated salt (cyclohexanebutyrate or acetate) in a polar basic aprotic solvent as dimethyl sulfoxide (DMSO) or N,N'-dimethylformamide (DMF) at room temperature. It is necessary to control the water content and temperature to ensure the reproducibility. The hydrolysis of zinc carboxylates allows the formation of ZnO nanoparticles of different sizes, depending on reaction conditions. Solvent basicity and the interaction of DMSO-H2O play crucial roles on the hydrolysis mechanism. The stability and the optical properties of the ZnO colloids were monitored by UV-visible electronic absorption and emission spectroscopies. From an HR-TEM study it was established that low concentration (2 x 10(-4) M) of zinc cyclohexanebutyrate and zinc acetate afforded ZnO nanocrystallites of (2.12 nm, SD = 0.76) and (3.0 nm, SD = 0.5), average size, respectively. ZnO nanocrystals with rock salt structure coexist with wurtzite structure when zinc cyclohexanebutyrate is used as the starting salt. Dynamic light backscattering size measurements of ZnO nanoparticles were accomplished in DMSO colloid dispersions, resulting in the detection of small individual nanoparticles and assemblies of nanoparticles. Powder X-ray diffraction spectroscopy was used to accomplish the nanoparticle characterization, of DMF dispersions. Experimental results show that cyclohexanebutyrate acts as a more effective capping agent than acetate. Low concentration (2 x 10-4 M) colloidal ZnO dispersions in DMSO did not show any flocculation or red shift in two months, probably due to the concatenated dynamic stabilizing action of carboxylate ions and solvent molecules. The ZnO colloids in DMF are not stable and readily precipitate; moreover, nanoparticles in this solvent tend to adhere to glass walls, which allows production of ZnO films MH - Hungary MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000186574500011 L2 - DIMETHYL-SULFOXIDE; SEMICONDUCTOR PHOTOCATALYSIS; SILVER NANOPARTICLES; OXIDE; ACIDITIES; SURFACE; SOLVENT; DMSO; N,N-DIMETHYLFORMAMIDE; REDUCTION SO - Journal of Physical Chemistry B 2003 ;107(46):12597-12604 9322 UI - 6852 AU - Rodriguez-Henriquez F AU - Koc QK AD - IPN, CINVESTAV, Dept Ingn Elect, Secc Computac, Mexico City 07300, DF, MexicoOregon State Univ, Dept Elect & Comp Engn, Corvallis, OR 97331, USARodriguez-Henriquez, F, IPN, CINVESTAV, Dept Ingn Elect, Secc Computac, Av Inst Politecn Nacl 2508, Mexico City 07300, DF, Mexico TI - Parallel multipliers based on special irreducible pentanomials AB - The state-of-the-art Galois field GF(2(m)) multipliers offer advantageous space and time complexities when the field is generated by some special irreducible polynomial. To date, the best complexity results have been obtained when the irreducible polynomial is either a trinomial or an equally spaced polynomial (ESP). Unfortunately, there exist only a few irreducible ESPs in the range of interest for most of the applications, e.g., error-correcting codes, computer algebra, and elliptic curve cryptography. Furthermore, it is not always possible to find an irreducible trinomial of degree m in this range. For those cases where neither an irreducible trinomial nor an irreducible ESP exists, the use of irreducible pentanomials has been suggested. Irreducible pentanomials are abundant, and there are several eligible candidates for a given m. In this paper; we promote the use of two special,types of irreducible pentanomials. We propose new Mastrovito and dual basis multiplier architectures based on these special irreducible pentanomials and give rigorous analyses of their space and time complexity MH - Mexico|Distrito Federal MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9340 UR - ISI:000186793600002 L2 - finite fields arithmetic;parallel multipliers;pentanomials;multipliers for GF(21(m));FINITE-FIELDS; MULTIPLICATION SO - Ieee Transactions on Computers 2003 ;52(12):1535-1542 9323 UI - 7874 AU - Rodriguez-Hernandez AI AU - Durand S AU - Garnier C AU - Tecante A AU - Doublier JL AD - Univ Nacl Autonoma Mexico, Fac Quim E, Dept Alimentos & Biotecnol, Mexico City 04510, DF, MexicoINRA, Lab Physicochim Macromol, F-44316 Nantes 3, FranceTecante, A, Univ Nacl Autonoma Mexico, Fac Quim E, Dept Alimentos & Biotecnol, Cd Univ, Mexico City 04510, DF, Mexico TI - Rheology-structure properties of gellan systems: evidence of network formation at low gellan concentrations AB - The dynamic rheology and confocal laser scanning microscopy (CLSM) of gellan at low concentrations (0.005-0.05 wt%) in the presence of 10 mM CaCl2 were investigated at 25 degreesC. DSC thermograms showed a conformational transition from coil to rigid helix at approximately 41 degreesC. Microscopy observations demonstrated that at these low gellan concentrations, the level of counter ions induced formation of a network, the compactness of which depended on gellan concentration. The reinforcement of the network structures by the increase of gellan concentration resulted in more elastic gels well evidenced through the rheology of the systems. (C) 2003 Elsevier Science Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000184313400007 L2 - gellan;rheology;confocal microscopy;viscoelasticity;gels;ATOMIC-FORCE MICROSCOPY; SOL TRANSITION; GUM SOLUTIONS; GELS; SALTS SO - Food Hydrocolloids 2003 ;17(5):621-628 9324 UI - 7368 AU - Rodriguez-Lopez JL AU - Montejano-Carrizales JM AU - Jose-Yacaman M AD - Inst Potosino Invest Cientif & Tecnol AC, San Luis Potosi 78231, SLP, MexicoUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoRodriguez-Lopez, JL, Inst Potosino Invest Cientif & Tecnol AC, Apartado Postal 3-74, San Luis Potosi 78231, SLP, Mexico TI - Molecular dynamics study of bimetallic nanoparticles: the case of AuxCuy alloy clusters AB - Gold and copper nanoparticles present atomic structures which are either icosahedral (I-h), decahedral (D-h) or octahedral (O-h), depending of the particle size. Some experimental results had previously reported the stabilization of the Ih phase in AuCu and AuFe clusters, being this phase predominant at 25% copper concentration in both systems. Another result reports an fcc-like and core/shell structure under similar experimental conditions and/or similar systems. In the present work, we study the possible phase conformations and thermal behavior of AuCu binary clusters using classical molecular dynamics simulations with a Sutton and Chen inter-atomic potential, addressing under which conditions the different phases mentioned above take place. To discern between the structures of bimetallic systems, the following main factors are determinant: the cluster size N, the concentration and nature of the elements in the alloy, and the annealing temperature. We choose the particles in our study closed to the sizes reported experimentally, with the cubo-octahedral symmetry as starting point. We have changed the concentration of copper from 50 to 10%, simulating an annealing process around the temperature of 750 K. We have found optimum stability of the icosahedral phase at concentrations of copper around 75 and 25% in fair agreement with experimental reports, and a trend to adopt a quasi-spherical shape with a core/shell structure at high temperatures in the cluster, just before the melting temperature. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000185580300007 L2 - molecular dynamics;metallic nanoparticles;AuCu alloys;GOLD CLUSTERS; SIZE DEPENDENCE; SURFACE SEGREGATION; SMALL PARTICLES; NANOCLUSTERS; COPPER; NI; NANOSTRUCTURES; POTENTIALS; MECHANISM SO - Applied Surface Science 2003 ;219(1-2):56-63 9325 UI - 8241 AU - Rodriguez-Lopez JL AU - guilera-Granja F AU - Michaelian K AU - Vega A AD - Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78231, MexicoUniv Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainRodriguez-Lopez, JL, Inst Potosino Invest Cient & Tecnol, AC Apartado Postal 3-74, San Luis Potosi 78231, Mexico TI - Structure and magnetism of cobalt clusters AB - The lowest-energy geometric structures and isomers of freestanding Co-N clusters (4less than or equal toNless than or equal to60) and their corresponding magnetic moments are calculated using an evolutive algorithm based on a many-body Gupta potential and a self-consistent spd tight-binding method, respectively. We found an icosahedral growth pattern for the global minimum with some hcp and fcc structures for some particular sizes, whereas for the second isomer, distorted icosahedral structures are obtained in general. With the aim to study the possible coexistence of isomers within the experimental cluster beam we assumed an equilibrium distribution and calculated for each cluster size the different coexistent structures and the relative populations at room temperature. Our results show that the coexistence is present only at some particular sizes, in agreement with chemical-adsorption and photoionization experiments. Our self-consistent tight-binding calculations considering 3d, 4s, and 4p valence electrons for the magnetic properties show that the magnetic moments for the global minima and the second isomers are in general very similar except in a small region of 20 and <111> specimens exhibited pronounced yield points. Slip trace analysis showed the active slip planes to be {001} and {012}, respectively, with similar critical resolved shear stresses. The hard <100> orientation exhibited neither slip traces nor an anomalous yield point. (C) 2002 Acta Materialia Inc. Published. by Elsevier Science Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000179880600013 L2 - single crystal;intermetallic compounds;high temperature mechanical properties;yield phenomena;MECHANICAL-PROPERTIES; MO-12SI-8.5B AT.PERCENT; BEHAVIOR; SILICIDES; PHASE SO - Scripta Materialia 2003 ;48(2):185-190 9369 UI - 7433 AU - Rosas-Acevedo JL AU - Boucias DG AU - Lezama R AU - Sims K AU - Pescador A AD - Univ Florida, Dept Entomol & Nematol, Gainesville, FL 32611, USAUniv Autonoma Guerrero, Unidad Estudios Posgrado & Invest Acapulco, Ctr Desarrollo Reg, Acapulco 39301, Gro, MexicoUniv Colima, Tecoman 28130, ColombiaBoucias, DG, Univ Florida, Dept Entomol & Nematol, Nat Area Dr,POB 110620, Gainesville, FL 32611 USA TI - Exudate from sporulating cultures of Hirsutella thompsonii inhibit oviposition by the two-spotted spider mite Tetranychus urticae AB - The acaricidal mycopathogen Hirsutella thompsonii has been found to secrete metabolites that are active against female Tetranychus urticae. Specifically, the rose-colored exudate produced on sporulating cultures of Mexican HtM120I strain sterilized female spider mites in a dose-dependent fashion. Topical application of the exudate resulted in a 100% reduction in mite fecundity over the initial six days of experimentation. Depending upon the exudate dosage, mites partially recovered within 3 and 6 d post-treatment and produced a limited number of eggs. The spider mite active HtM120I exudate contained less detectable HtA toxin than the HtM120I broth filtrate, and it was innocuous when injected into the greater wax moth Galleria mellonella L. larvae. Broth filtrates of HtM120I cultures, although toxic to assayed G. mellonella larvae, did not inhibit mite oviposition to the degree or duration of the exudate preparations. These findings suggest that the factor responsible for suppressing oviposition in female spider mites is linked to the sporulation process and is distinct from the well-characterized HtA produced by vegetative cells MH - Colombia MH - USA MH - Mexico|Guerrero PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0168-8162 UR - ISI:000185514700003 L2 - fungal exudates;Hirsutella thompsonii;hirsutellin A;mites;mycotoxins;oviposition;Tetranychus urticae;CITRUS RUST MITE; PHYLLOCOPTRUTA-OLEIVORA; NEOZYGITES-FLORIDANA; IN-VITRO; ACARI; PHOMALACTONE; RESISTANCE; TOXICITY; FUNGI SO - Experimental and Applied Acarology 2003 ;29(3-4):213-225 9370 UI - 7350 AU - Rosas-Elguera J AU - va-Valdivia LM AU - Goguitchaichvili A AU - Urrutia-Fucugauchi J AU - Ortega-Rivera MA AU - Prieto JCS AU - Lee JKW AD - Univ Guadalajara, Ctr Ciencias Tierra, Guadalajara 44840, Jalisco, MexicoUniv Nacl Autonoma Mexico, Lab Paleomagnetismo Geofis Nucl, Mexico City 04510, DF, MexicoCtr Geociencias, Juriquilla 76230, Queretaro, MexicoConsejo Recursos Minerales, Pachuca 42080, Hidalgo, MexicoQueens Univ, Dept Geol Sci & Geol Engn, Kingston, ON K7L 3N6, CanadaRosas-Elguera, J, Univ Guadalajara, Ctr Ciencias Tierra, Av Revoluc 1500, Guadalajara 44840, Jalisco, Mexico TI - Counterclockwise rotation of the Michoacan block: Implications for the tectonics of western Mexico AB - Subduction of the Farallon plate beneath North America resulted in formation of the Rivera and Cocos oceanic plates, the extensive magmatic arcs of the Sierra Madre Occidental (SMO), and the Trans-Mexican Volcanic Belt (TMVB). Southern Mexico consists of crustal blocks separated by a regional extensional structural system; the latter, called the Guadalajara triple junction, is defined by the Tepic-Zacoalco (TZR), Colima (CR), and Chapala (CHR) rifts. TZR and CHR separate the SMO from the Jalisco and Michoacan blocks, whereas CR is the boundary between the Jalisco and Michoacan blocks. In this study, we carried out combined radiometric and paleomagnetic analyses in the Michoacan block. Radiometric dates of 31.60 to 8.39 Ma confirm both the southern extension of the Sierra Madre Occidental and the early mafic TMVB succession into the Michoacan block. The Oligocene age agrees well with the radiometric dating reported for the southern SMO and the Tertiary volcanic fields of the Sierra Madre del Sur. Paleomagnetic data indicate a counterclockwise rotation of similar to24degrees about a vertical axis for the Michoacan block. Several plate models suggest either dextral or sinistral oblique convergence of the Cocos plate relative to North America. Our new results help to constrain these different models. These data demostrate that deformation in the Michoacan block is as old as late Miocene, and is related to sinistral oblique convergence of the Cocos plate relative to North America-inducing the southeast relative motion of the Michoacan block. The structural trends along both CHR and CR are thereby explained. On the other hand, right-lateral transtension along the TZR is related to the westward motion of the Jalisco block because of oblique convergence of the Rivera plate MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Mexico|Jalisco MH - Mexico|Queretaro PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 0 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000185729300004 L2 - VOLCANIC BELT; PALEOMAGNETIC DATA; NORTH-AMERICAN; JALISCO BLOCK; RIVERA PLATE; EXTENSION; INTERCALIBRATION; CALIFORNIA; KINEMATICS; STANDARDS SO - International Geology Review 2003 ;45(9):814-826 9371 UI - 9156 AU - Rosenblueth JF AD - Natl Autonomous Univ Mexico, Inst Res Appl Math & Syst, Mexico City 04510, DF, MexicoWeizmann Inst Sci, IL-76100 Rehovot, IsraelRosenblueth, JF, Natl Autonomous Univ Mexico, Inst Res Appl Math & Syst, Mexico City 04510, DF, Mexico TI - Conjugate intervals for the linear fixed-endpoint control problem AB - For certain optimal control problems with piecewise continuous controls, recently Loewen and Zheng (Ref. 1) and Zeidan (Ref. 2) defined two sets of generalized conjugate points for which, under normality assumptions, the second-order conditions in terms of the accessory problem imply their emptiness. However, simple examples show that checking the existence of such points may be more difficult than directly finding variations that make the second variation negative. In this paper, for the linear fixed-endpoint control problem, we introduce a new set whose emptiness is equivalent to the nonnegativity of the second variation along admissible variations. Moreover, we achieve by means of this set the main objective of introducing a characterization of this condition, namely, to obtain a simpler way of verifying it MH - Israel MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 0022-3239 UR - ISI:000181044900009 L2 - generalized conjugate points;optimal control problems;normality;POINTS SO - Journal of Optimization Theory and Applications 2003 ;116(2):393-420 9372 UI - 8062 AU - Rosenthal GG AU - De La Rosa Reyna X AU - Kazianis S AU - Stephens MJ AU - Morizot DC AU - Ryan MJ AU - De Leon FJG AD - Boston Univ, Marine Program, Marine Biol Lab, Woods Hole, MA 02543, USAInst Tecnol Ciudad Victoria, Lab Biol Integrativa, Tamaulipas 87010, MexicoUniv Texas, MD Anderson Canc Ctr, Div Res, Smithville, TX 78957, USAUniv Texas, Sch Biol Sci, Sect Integrat Biol, Austin, TX 78712, USARosenthal, GG, Boston Univ, Marine Program, Marine Biol Lab, 7 MBL St, Woods Hole, MA 02543 USA TI - Dissolution of sexual signal complexes in a hybrid zone between the swordtails Xiphophorus birchmanni and Xiphophorus malinche (Poeciliidae) AB - The evolution of sexual signaling systems is influenced by natural and sexual selection acting on complex interactions among traits. Natural hybrid zones are excellent systems for assessing fitness effects on sexual phenotypes. Most documented hybrid zones, however, show little variation in sexual signals. A hybrid zone between the swordtails Xiphophorus birchmanni and Xiphophorus malinche is characterized by numerous recombinants for male sexual traits. Analyses of geographic variation in morphological and isozyme traits in the Rio Calnali, Hidalgo, Mexico, reveal an upstream-to-downstream gradient from X. malinche- to X. birchmanni-type traits. A second hybrid zone, likely isolated from the R. Calnali, occurs in the nearby Arroyo Pochutla. Although the presumed female preference for swords predicts the introgression of swords from X. malinche-like populations into hybrid populations, the opposite pattern was observed. Swords are reduced in populations otherwise characterized by X. malinche traits. Sexually dimorphic traits were poorly correlated within individuals, indicating that sexual selection does not act against recombinant phenotypes. Hybrid males also exhibit trait values outside the range of parental variation. These patterns are consistent with predictions that females are permissive, preferring generally conspicuous males without attending to specific features MH - USA MH - Mexico|Tamaulipas PB - CHARLESTON: AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS RP - NOT IN FILE U3 - TC 7 U4 - Zoology U5 - J;Article AV - English IS - 0045-8511 UR - ISI:000183817700008 L2 - PREEXISTING BIAS; SELECTION; PREFERENCES; CHOICE; HYBRIDIZATION; NIGRENSIS; PHYLOGENY; EVOLUTION; BEHAVIOR; PLUMAGE SO - Copeia 2003 ;(2):299-307 9373 UI - 4651 AU - Rosu HC AU - Moran-Mirabal JM AU - Planat M AD - Inst Potosino Invest Cientif & Tecnol, Tangamanga, MexicoCNRS, Lab Phys & Metrol Oscillateurs, F-25044 Besancon, FranceRosu, HC, Inst Potosino Invest Cientif & Tecnol, Apdo Postal 3-74, Tangamanga, Mexico TI - Milne phase for the Coulomb quantum problem related to Riemann's hypothesis AB - We use the Milne phase function in the continuum part of the spectrum of the particular Coulomb problem that has been employed by Bhaduri, Khare, and Law as an equivalent physical way for calculating the density of zeros of the Riemann's function on the critical line. The Milne function seems to be a promising approximate method to calculate the density of prime numbers MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - S;Article AV - English IS - 0951-3248 UR - ISI:000222970400139 SO - Group 24 : Physical and Mathematical Aspects of Symmetries 2003 ;173():695-697 9374 UI - 8482 AU - Rouse M AU - Faillenius UB AU - Tortajada C AD - Drinking Water Inspectorate, London SW1E 6DE, EnglandNaturvardsverket, SE-10648 Stockholm, SwedenThird World Ctr Water Management, Atizapan 52958, Estado Mexico, MexicoRouse, M, Drinking Water Inspectorate, 2-D1 Ashdown House,123 Victoria St, London SW1E 6DE, England TI - Workshop 6 (synthesis): water pricing AB - Water shold be costed so that it is valued, and fees should be transparent and contribute to adequate cost recovery with consideration of social, economic and environmental effects. There is a need for targeted subsidies to assist the poor. Water pollution fees for point sources can reduce discharges MH - United Kingdom MH - Mexico|Estado De Mexico MH - Sweden PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000182774400032 L2 - cost recovery;water pollution fees;water tariffs SO - Water Science and Technology 2003 ;47(6):185-187 9375 UI - 7061 AU - Roux MV AU - Temprado M AU - Jimenez P AU - Guzman-Mejia R AU - Juaristi E AU - Chickos JS AD - Inst Quim Fis, Madrid 28006, SpainInst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Missouri, Dept Chem, St Louis, MO 63121, USARoux, MV, Inst Quim Fis, Serrano 119, Madrid 28006, Spain TI - Heat capacities of thiane sulfones and thiane sulfoxide - Refining of C-p group values for organosulfur compounds and their oxides AB - A thermophysical study of thiane sulfone, 1; 1,3-dithiane sulfone, 2; and 1,3-dithiane sulfoxide, 3 in the temperature intervals between T = 268 K and their respective melting temperatures has been carried out. The experimental values for the mole fraction, temperature, enthalpy and entropy of fusion and the associated standard deviation as determined by differential scanning calorimetry (DSC) are x = (0.9996 +/- 0.0001), T-fus = (370.8 +/- 0.1) K, Delta(fus)H(m) = (18.4+/-0.2) kJ mol(-1), Delta(fus)S(m) = (49.6 +/- 0.5) J mol(-1) K-1 for thiane sulfone, 1; x = (0.9994 +/- 0.0001), T-fus, = (414.0 +/- 0.2) K, Delta(fus)H(m) = (22.0 +/- 0.2) kJ mol(-1) Delta(fus)S(m) = (53.1 +/- 0.4) J mol-1 K-1 for 1,3-dithiane sulfone, 2; and x = (0.9977 +/- 0.0001), T-fus = (361.9 +/- 0.1) K, Delta(fus)H(m) = (22.6 +/- 0.2) kJ mol(-1), Delta(fus)S(m) = (62.4 +/- 0.5) J mol(-1) K-1 for 1,3-dithiane sulfoxide, 3. Heat capacities in those temperature intervals and in condensed state were measured and no additional solid-solid phase transitions were observed. The heat capacities at T = 298.15 K were used to refine group values for organosulfur compounds and their oxides. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000186374000002 L2 - thiane sulfone;1,3-dithiane sulfone;1,3-dithiane sulfoxide;enthalpies of fusion;entropies of fusion;heat capacity;heat capacity group values;DIFFERENTIAL SCANNING CALORIMETRY; ADIABATIC CALORIMETRY; VAPOR-PRESSURES; ORGANIC LIQUIDS; SUBLIMATION; ENTHALPIES; 1,3,5-TRITHIANE; 1,3-DITHIANE; PHASE; CALIBRATION SO - Thermochimica Acta 2003 ;406(1-2):9-16 9376 UI - 9041 AU - Roux MV AU - Temprado M AU - Jimenez P AU - Davalos JZ AU - Notario R AU - Guzman-Mejia R AU - Juaristi E AD - CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRoux, MV, CSIC, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain TI - Calorimetric and computational study of thiacyclohexane 1-oxide and thiacyclohexane 1,1-dioxide (thiane sulfoxide and thiane sulfone). Enthalpies of formation and the energy of the S=O bond AB - A rotating-bomb combustion calorimeter specifically designed for the study of sulfur-containing compounds [J. Chem. Thermodyn. 1999,31, 635] has been used for the determination of the enthalpy of formation of thiane sulfone, 4, Delta(f)H(m)(o)(g) = -394.8 +/- 1.5 kJ mol(-1). This value stands in stark contrast with the enthalpy of formation reported for thiane itself, Delta(f)H(m)degrees(g) = -63.5 +/- 1.0 kJ mol(-1), and gives evidence of the increased electronegativity of the sulfur atom in the sulfonyl group, which leads to significantly stronger C-SO2 bonds. Given the known enthalpy of formation of atomic oxygen in the gas phase, Delta(f)H(m)degrees(O,g) = +249.18 kJ mol(-1), and the reported bond dissociation energy for the S=O bond in alkyl sulfones, BDE(S=O) = +470.0 kJ mol(-1), it was possible to estimate the enthalpy of formation of thiane sulfoxide, 5, a hygroscopic compound not easy to use in experimental calorimetric measurements, Delta(f)H(m)degrees(5) = -174.0 kJ mol(-1). The experimental enthalpy of formation of both 4 and 5 were closely reproduced by theoretical calculations at the G2(MP2)+ level, Delta(f)H(m)degrees(4) = -395.0 kJ mol(-1) and Delta(f)H(m)degrees(5) = -178.0 kJ mol(-1). Finally, calculated G2(MP2)+ values for the bond dissociation energy of the S=O bond in cyclic sulfoxide 5 and sulfone 4 are +363.7 and +466.2 kJ mol(-1), respectively MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000181329900015 L2 - EQUATORIAL TETRAHYDRO-2H-THIOPYRAN-1-OXIDES TETRAHYDROTHIOPYRAN-1-OXIDES; HYDROCARBONS INCLUDING AROMATICS; STANDARD MOLAR ENTHALPY; AB-INITIO LEVELS; CONFORMATIONAL-ANALYSIS; VAPOR-PRESSURES; THERMOCHEMICAL PROPERTIES; ORGANIC THERMOCHEMISTRY; GAUSSIAN-2 THEORY; MOLLER-PLESSET SO - Journal of Organic Chemistry 2003 ;68(5):1762-1770 9377 UI - 8509 AU - Roversi JA AU - Vidiella-Barranco A AU - Moya-Cessa H AD - Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, BrazilINAOE, Coordinac Opt, Puebla 72000, MexicoRoversi, JA, Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil TI - Dynamics of two atoms coupled to a cavity field AB - We investigate the interaction of two two-level atoms with a single mode cavity field. One of the atoms is exactly at resonance with the field, while the other is well far from resonance and hence is treated in the dispersive limit. We find that the presence of the non-resonant atom produces a shift in the Rabi frequency of the resonant atom, as if it was detuned from the field. We focus on the discussion of the evolution of the state purity of each atom MH - Brazil MH - Mexico|Puebla PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000182695500004 L2 - quantum optics;Jaynes-Cummings model;dispersive interaction;ENTANGLEMENT; STATES SO - Modern Physics Letters B 2003 ;17(5-6):219-224 9378 UI - 7517 AU - Royse DJ AU - Sanchez-Vazquez JE AD - Penn State Univ, Dept Plant Pathol, Mushroom Res Ctr, Buckhout Lab 316, University Pk, PA 16802, USAEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoRoyse, DJ, Penn State Univ, Dept Plant Pathol, Mushroom Res Ctr, Buckhout Lab 316, University Pk, PA 16802 USA TI - Influence of precipitated calcium carbonate (CaCO3) on shiitake (Lentinula edodes) yield and mushroom size AB - Synthetic substrate consisting of oak sawdust (50%), white millet (28%), winter rye (11%) and soft red wheat bran (11%) was non-supplemented or supplemented with 0.2%, 0.4% or 0.6% (dry weight basis) precipitated calcium carbonate (CaCO3). Shiitake (Lentinula edodes) was grown in two crops to determine the effect of three CaCO3 levels on mushroom yield and size. Yields and biological efficiencies (averages for two crops) from substrates non-supplemented with CaCO3 were lower by 14.1%, 18.4% and 24.9% compared to treatments supplemented with 0.2%, 0.4% and 0.6% CaCO3, respectively. Mushroom size (weight) was larger with non-supplemented substrate (16.8 g) compared to substrate supplemented with 0.6% CaCO3 (15.1 g). However, mushroom production was more consistent from crop to crop when 0.6% CaCO3 was added to substrate. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Chiapas MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000185264600017 L2 - Lentinula edodes;shiitake;edible mushrooms;SUBSTRATE; TIME SO - Bioresource Technology 2003 ;90(2):225-228 9379 UI - 6741 AU - rroyo-Cabrales J AU - Gardner AL AD - M&C Ticul Alvarez Solorzano, INAH, Lab Arqueozool, Mexico City 06060, DF, MexicoSmithsonian Inst, Biodivers Program Off, Washington, DC 20560, USANatl Museum Nat Hist, USGS Patuxent Wildlife Res Ctr, Washington, DC 20560, USAArroyo-Cabrales, J, M&C Ticul Alvarez Solorzano, INAH, Lab Arqueozool, Modena 16 Col Ctr, Mexico City 06060, DF, Mexico TI - The type specimen of Anoura geoffroyi lasiopyga (Chiroptera : Phyllostomidae) AB - In 1868, Wilhelm Peters described Glossonycteris lasiopyga, based on a specimen provided by Henri de Saussure and collected in Mexico. The type specimen was presumed to be among those housed in the collections of the Zoologisches Museum of the Humboldt, Universitat, in Berlin, Germany. Our study of one of Saussure's specimens from Mexico, discovered in the collections of the Museum d'Histoire Naturelle, Geneva, Switzerland, demonstrates that it and not one of the Berlin specimens is the holotype MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000187129600014 SO - Proceedings of the Biological Society of Washington 2003 ;116(3):737-741 9380 UI - 6742 AU - rroyo-Cetto D AU - Pulos G AU - Zenit R AU - Jimenez-Zapata MA AU - Wassgren CR AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoPurdue Univ, Sch Mech Engn, W Lafayette, IN 47907, USAZenit, R, Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico TI - Compaction force in a confined granular column AB - Experiments to determine the force required to push a granular column confined within a cylinder were performed. The experimental apparatus was mounted on a material testing system machine in order to obtain force and displacement measurements simultaneously. Experiments were performed for two different sphere diameters, two different cylinder diameters and for a range of piston displacement velocities. The force necessary to displace the column increases rapidly with the column height, in accordance with Janssen's theory. More importantly, we found that this force also increases with the displacement velocity. This unexpected behavior is an indication of the transition to rate-dependent behavior in dense granular flows MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000187183400016 L2 - IMMERSED CYLINDER; FLUCTUATIONS; FRICTION; FLOW; LAYERS; MEDIA SO - Physical Review e 2003 ;68(5): 9381 UI - 6785 AU - Ruano AE AU - Fleming PJ AU - Teixeira C AU - Rodriguez-Vazquez K AU - Fonseca CM AD - Univ Algarve, Ctr Intelligent Syst, Faro, PortugalUniv Sheffield, Dept Automat Control & Syst Engn, Sheffield, S Yorkshire, EnglandUniv Nacl Autonoma Mexico, IIMAS, Mexico City 04510, DF, MexicoRuano, AE, Univ Algarve, Ctr Intelligent Syst, Faro, Portugal TI - Nonlinear identification of aircraft gas-turbine dynamics AB - Identification results for the shaft-speed dynamics of an aircraft gas turbine, under normal operation, are presented. As it has been found that the dynamics vary with the operating point, nonlinear models are employed. Two different approaches are considered: NARX models, and neural network models, namely multilayer perceptrons, radial basis function networks and B-spline networks. A special attention is given to genetic programming, in a multiobjective fashion, to determine the structure of NARMAX and B-spline models. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Portugal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0925-2312 UR - ISI:000186953400008 L2 - gas-turbine engines;nonlinear system identification;neural networks;genetic programming;multiobjective optimisation;MODELS SO - Neurocomputing 2003 ;55(3-4):551-579 9382 UI - 7209 AU - Rubo YG AU - Laussy FP AU - Malpuech G AU - Kavokin A AU - Bigenwald P AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Clermont Ferrand, CNRS, UMR 6602, LASMEA, F-63177 Aubiere, FranceRubo, YG, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Dynamical theory of polariton amplifiers AB - We present the theory of the dynamics of the polariton amplifier in the region of small polariton densities. We give an analytical solution for the polariton condensate density matrix and show that the formation of a coherent quantum state is possible. Once the condensate is formed, the coherence becomes macroscopically long living. Polariton amplifier represents, therefore, an optical memory element, where the input weak coherent signal can be amplified and kept MH - France MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000185862500033 L2 - SEMICONDUCTOR MICROCAVITIES; STIMULATED SCATTERING; NONLINEAR OPTICS; LASERS; CONDENSATION SO - Physical Review Letters 2003 ;91(15): 9383 UI - 7298 AU - Rueda M AU - Defeo O AD - INVEMAR, Santa Marta, ColombiaIPN, CINVESTAV, Lab Biol Pesquera, Unidad Merida, Merida 97310, Yucatan, MexicoRueda, M, INVEMAR, Apdo 1016, Santa Marta, Colombia TI - Spatial structure of fish assemblages in a tropical estuarine lagoon: combining multivariate and geostatistical techniques AB - The spatial structure and seasonal changes of estuarine fish assemblages in the Cienaga Grande de Santa Marta (CGSM) were analysed based on four seasonal comprehensive surveys conducted in 1993-1994 and 1997. Geostatistical and multivariate techniques were used to: (a) determine seasonal changes in spatial distribution of the species richness, and (b) identify assemblages of estuarine fish and their relation to abiotic factors. Potential biotic interactions affecting the assemblage structure were also explored. A total of 11075 individuals representing 39 species were collected, with Eugerres plumieri, Diapterus rhombeus, Micropogonias furnieri, Mugil incilis, Cathorops spixii, Elops saurus and Anchovia clupeoides as dominant species between seasons. Spatial distribution of fish richness differed between rainy and dry seasons in each year, whereas species mapping showed spatial patchiness in 1993-1994 and gradients during 1997. Strong evidence of species saturation was found in all seasons, suggesting biotic interactions limiting species richness at a threshold density of ca. 50 ind./5000 m(2). Marine, marine-estuarine and freshwater species were classified in each season according to their capability to cope with salinity fluctuations. Associations defined by functional feeding guilds were also identified. Empirical and statistic evidence showed that fish assemblages differed between seasons within each year, and each assemblage was always dominated by a small number of species, notably E. plumieri in both years 1993-1994 and 1997. Between-season differences in fish assemblage structure in the CGSM seem to be driven by abiotic factors; however, evidence of species saturation could suggest the existence of density-dependent factors operating together. (C) 2003 Elsevier B.V. All rights reserved MH - Colombia MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000185819000008 L2 - tropical estuarine lagoon;fish assemblages;spatial and temporal variability;multivariate analysis;geostatistics;Colombia;DE-SANTA-MARTA; COLOMBIA; MANAGEMENT SO - Journal of Experimental Marine Biology and Ecology 2003 ;296(1):93-112 9384 UI - 7826 AU - Rueda M AU - Defeo O AD - CINVESTAV, IPN, Lab Biol Pesquera, Unidad Merida, Merida 97310, Yucatan, MexicoInst Invest Marinas & Costeras, Santa Maria, ColombiaRueda, M, CINVESTAV, IPN, Lab Biol Pesquera, Unidad Merida, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - A bioeconomic multispecies analysis of an estuarine small-scale fishery: spatial structure of biovalue AB - We estimated the spatial population structure by size and the economical potential (biovalue) of a multispecies fish resource in an estuarine lagoon in Colombia, based on fishery-dependent (catch and effort) and independent (seasonal fishing surveys) data. Model-based (geostatistics, kriging) estimations of such performance variables were used to quantify the uncertainty in abundance, individual price by size and variable costs per haul. Monte Carlo analysis was used to assess the status of the fishery. The spatial dimension of risk analysis was explored by indicator kriging, whereas effects of biovalue on the spatial allocation of fishing effort were evaluated using contingency tables. Fish abundance, individual sizes and biovalue were spatially structured, but the spatial patterns varied between seasons and species. Analysis of biovalue showed a moderate risk that fishers had economic losses derived from the fishing activity. Spatial risk analysis showed that no more than 30% of the total area from the lagoon registered profitable levels of fish abundance, which affected the spatial allocation of fishing effort. Management implications supported by our study suggest seasonal and spatial fishing closures to protect juveniles and spawning stock of fish species. (C) 2003 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved MH - Colombia MH - Mexico|Yucatan PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1054-3139 UR - ISI:000184396600002 L2 - fish abundance;population structure;biovalue;geostatistics;spatial risk analysis;tropical estuarine lagoon;Colombia;DE-SANTA-MARTA; POPULATION-DYNAMICS; GEOSTATISTICS; MANAGEMENT; COLOMBIA; LAGOON; STOCK SO - Ices Journal of Marine Science 2003 ;60(4):721-732 9385 UI - 7259 AU - Ruelle P AU - Mailhol JC AU - Quinones H AU - Granier J AD - Cemagref, French Inst Agr & Environm Res, Irrigat Res Unit, F-34033 Montpellier, FranceIMTA, Cuernavaca, Morelos, MexicoMailhol, JC, Cemagref, French Inst Agr & Environm Res, Irrigat Res Unit, BP 5095, F-34033 Montpellier, France TI - Using NIWASAVE to simulate impacts of irrigation heterogeneity on yield and nitrate leaching when using a travelling rain gun system in a shallow soil context in Charente (France) AB - This paper deals with the impact of irrigation and fertilising practices on corn yield and nitrate leaching on a shallow soil plot in Charente (France). This impact analysis is made using NIWASAVE, a model simulating the impact of water applications depths on crop yields and nitrate leaching, in the case of a travelling rain gun system (TRGS) on a climatic series. A first type of scenario regarding the TRGS usage (lane spacing, field orientation, daily versus night irrigation) is tested and compared to a reference scenario (current farmer practices). Simulations show low deviation levels from the reference scenario with regards to nitrogen leaching and crop yields aspects under the climatic and soil context of Charente. Results can be linked to principal wind profiles (speed, direction and time-table versus irrigation time) for this region in close proximity with the Atlantic Ocean. Moreover, a lane spacing effect on the water distribution along a transect can be observed. A second type of scenarios regarding water application depths (WADs) and fertilisation is implemented. Best results are obtained on NO32- leaching and drainage by reducing both WAD and nitrate fertiliser applications (NFAs). Whatever the scenario, a substantial drainage is observed every year during the inter-cropping season what may increase the risk of nitrate leaching during this period. In addition, this study shows that fertiliser requirements do not match those proposed by the reference scenario. A NFA reduction of 20% results in an average yield reduction of 0.1 t/ha. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Agronomy;Water Resources U5 - J;Article AV - English IS - 0378-3774 UR - ISI:000186007600002 L2 - NIWASAVE;soil;charente;NONUNIFORM SPRINKLER IRRIGATION; WATER PRODUCTION-FUNCTIONS; OPTIMAL CROPPING PATTERNS; NITROGEN BALANCES; GENERIC MODEL; DEEP SEEPAGE; UNIFORMITY; VARIABILITY; VALIDATION; STICS SO - Agricultural Water Management 2003 ;63(1):15-35 9386 UI - 7106 AU - Ruiz-Campos G AU - Camarena-Rosales F AU - Varela-Romero A AU - Sanchez-Gonzales S AU - de la Rosa-Velez J AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoUniv Sonora, Dept Invest Cient & Tecnol, Hermosillo 83000, Sonora, MexicoUniv Autonoma Sinaloa, Escuela Biol, Culiacan 80010, Sinaloa, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoRuiz-Campos, G, PMB 064,POB 189003-064, Coronado, CA 92178, USA TI - Morphometric variation of wild trout populations from northwestern Mexico (Pisces : Salmonidae) AB - Morphometric variation of 17 wild trout populations of the genus Oncorhynchus from northwestern Mexico was analyzed. We used 25 standardized morphometric characters following a box truss protocol. In the discriminant function analysis (DFA) of the examined specimens (n=214), grouped by drainage, the canonical root 1 explained 88.1% of the total variation. Sixteen linear characters allow distinguishing O. mykiss nelsoni (Sierra San Pedro Martir [SSPM]) from O. chrysogaster and O. mykiss sspp. (Sierra Madre Occidental [SMO]). Two distinctive groups of populations were recognized on the basis of the squared Mahalanobis' distances, one for the SSPM (O. m. nelsoni) and the other for the SMO. The latter group is divided into four subgroups: (1) O. chrysogaster (Rio Fuerte and Rio Culiacan) and O. mykiss ssp. (Rio Piaxtla); (2) O. mykiss sspp. (Rio San Lorenzo, Rio Baluarte, and Rio Acaponeta); (3) O. mykiss sspp. (Rio Yaqui and Rio Mayo); and (4) O. chrysogaster (Rio Sinaloa). In the DFA among populations within each taxon, the canonical variable 1 accounted for 41.8% of the total variation for O. m. nelsoni, 59.4% for O. chrysogaster, and 43.8% for O. m. sspp MH - Mexico|Baja California MH - Mexico|Sinaloa MH - Mexico|Sonora MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0960-3166 UR - ISI:000186268900004 L2 - morphometrics;northwestern Mexico;Oncorhynchus;variation;wild trout SO - Reviews in Fish Biology and Fisheries 2003 ;13(1):91-110 9387 UI - 7437 AU - Ruiz-Carus R AU - Uribe-Alcocer M AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoRuiz-Carus, R, Florida Marine Res Inst, FWC, 100 8th Ave SE, St Petersburg, FL 33701 USA TI - Karyotype analysis of Eucinostomus argenteus, E-gula, E-harengulus, and Eugerres plumieri (Teleostei, Gerreidae) from Florida and Puerto Rico AB - The karyotypes of four gerreids of the western Atlantic Ocean are documented. A diploid chromosome complement of 48 telocentric chromosomes was found in the four species (2N = 48t, fundamental number FN = 48). No differences were detected either in the number of chromosomes of the standard karyotype, in their karyotype size, or between the karyotypes derived from male or female specimens of any of the species. Chromosome length decreased progressively and slightly from pair 1 to pair 24. The Ag - NOR karyotypes of E. argenteus and E. harengulus were characterized by the position of the nucleolar organizer regions next to the centromere in chromosome pair 1, whereas in E. gula and E. plumieri Ag - NORs were detected in pair 4. The other 46 chromosomes showed a light staining of the centromere with no terminal or intermediate heterochromatic blocks. All Eucinostomus species showed Ag - NORs of similar size, while Eugerres plumieri showed Ag - NORs 10 - 20% larger than Eucinostomus species. A combination of size and position of the Ag - NORs identified E. gula, while size alone identified E. plumieri. However, the ancestral state for size and position of Ag - NORs could not be established. There was no differential staining of the chromosomes by G-banding. The karyotype of the gerreids appears similar to the hypothetical ancestral karyotype of fish. The phylogenetic relationships among these species could not be established because of the lack of chromosome G-bands. Most likely this indicates a homogeneous distribution of GC nucleotides in the chromosomes MH - USA MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0378-1909 UR - ISI:000185463400006 L2 - osteichthyes;spotfin mojarra;mojarrita plateada;silver jenny;mojarrita espanola;tidewater mojarra;mojarrita oscura;striped mojarra;mojarra rayada;cytogenetics;NUCLEOLUS ORGANIZER REGIONS; COLD-BLOODED VERTEBRATES; AMERICAN MINNOWS CYPRINIDAE; FISH CHROMOSOMES; GENE DUPLICATION; RIBOSOMAL-RNA; DNA CONTENT; AG-NOR; GENOME; PISCES SO - Environmental Biology of Fishes 2003 ;67(3):269-276 9388 UI - 8805 AU - Ruiz-Carus R AU - Uribe-Alcocer M AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoRuiz-Carus, R, Florida Marine Res Inst, Florida Fish & Wildlife Conservat Commiss, 100 8th Ave SE, St Petersburg, FL 33701 USA TI - Phylogenetic assessment of Eucinostomus gula, Eugerres plumieri, and Diapterus auratus (Pisces : Gerreidae) based on allozyme and mtDNA analyses AB - The phylogeny of three gerreid species was evaluated through allozymes and mtDNA analyses. Genetic similarities were estimated with data from 18 protein-coding loci and from mtDNA fragments produced by 3 restriction enzymes. The allozyme and mtDNA dendograms had identical topology. Genetic distance, genetic similarity, and mtDNA sequence divergence indicated that E. plumieri and D. auratus are closer than any other combination of the three taxa. Eugerres and Diapterus are clearly sister groups within the dendogram. Allozyme and mtDNA analyses support the common taxonomic practice of grouping the mojarras that possess a serrated preoperculum MH - USA MH - Mexico|Distrito Federal PB - MAYAGUEZ: UNIV PUERTO RICO, RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation U5 - J;Article AV - English IS - 0008-6452 UR - ISI:000182023300011 L2 - MITOCHONDRIAL-DNA; DIFFERENTIATION; VERTEBRATES; EVOLUTION; GENETICS; DISTANCE SO - Caribbean Journal of Science 2003 ;39(1):109-115 9389 UI - 7857 AU - Ruiz-Esparza J AU - Barba-Gomez J AD - Univ Calif San Diego, San Diego, CA 92103, USAInst Dermatol, Jalisco, Mexico TI - Non-ablative radiofrequency in the treatment of severe active acne vulgaris MH - Mexico|Jalisco MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Meeting Abstract AV - English IS - 0196-8092 UR - ISI:000181880400101 SO - Lasers in Surgery and Medicine 2003 ;():31-31 9390 UI - 7858 AU - Ruiz-Esparza J AU - Gomez JB AD - Univ Calif San Diego, La Jolla, CA 92093, USAInst Dermatol, Jalsico, Mexico TI - The non-invasive, non-surgical breast lift radiothermopexy: Tissue tightening via non-ablative radiofrequency MH - Mexico|Jalisco MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Meeting Abstract AV - English IS - 0196-8092 UR - ISI:000181880400119 SO - Lasers in Surgery and Medicine 2003 ;():36-36 9391 UI - 8829 AU - Ruiz-Esparza J AU - Gomez JB AD - Univ Calif San Diego, San Diego, CA 92103, USAInst Dermatol Jalisco, Guadalajara, Jalisco, MexicoRuiz-Esparza, J, 296 H St,Suite 200, Chula Vista, CA 91910, USA TI - The medical face lift: A noninvasive, nonsurgical approach to tissue tightening in facial skin using nonablative radiofrequency AB - BACKGROUND. Traditional surgical rhytidectomy is aimed at correcting facial skin that is sagging, which is caused by excessive skin laxity as a result of photoaging. Operating room facilities, general anesthesia, and a skilled surgeon are needed. The patient has recuperation time, which may be prolonged if complications arise. Incision lines are where they could be easily camouflaged or where they blend with natural lines. Nevertheless, healing of surgical wounds and concurrent scars are seen in all patients. OBJECTIVE. To evaluate the function of a novel technology that tightens tissue, using energy in the radiofrequency segment of the electromagnetic spectrum to produce internal heat within the skin. METHODS. Fifteen patients had one treatment session under topical anesthesia and without sedation. Ages ranged from 41 to 68 years. The total treatment time lasted 40 minutes or less. A new radiofrequency unit with concurrent delivery of a cryogen spray to spare the epidermis from burning was used. Pain was used as a clinical indicator of maximum tolerable energy delivered. No postoperative care was needed. RESULTS. All patients experienced minimal discomfort and were able to return to their normal activities right away. One patient did not respond to this treatment. For all of the others, visible results appeared approximately 12 weeks after the treatment session. In one patient, however, the results started at only 1 week after treatment. Four independent physicians outside of the study reviewed standardized photographs to evaluate results. The patients were followed for 6 to 14 months. CONCLUSION. Fourteen of 15 patients obtained cosmetic improvement from facial skin tightening induced by a novel nonlaser, nonablative, noninvasive source. Nonablative radiofrequency is a safe and effective method to achieve tissue tightening of the face to correct excessive sagging from photoaging. Patients had visible results as early as 1 week and generally within 3 months after the procedure without wounding or scarring MH - Mexico|Jalisco MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 32 U4 - Dermatology;Surgery U5 - J;Article AV - English IS - 1076-0512 UR - ISI:000181835300002 L2 - DIOXIDE SO - Dermatologic Surgery 2003 ;29(4):325-332 9392 UI - 8830 AU - Ruiz-Esparza J AU - Gomez JB AD - Univ Calif San Diego, San Diego, CA 92103, USAInst Dermatol Jalisco, Guadalajara, Jalisco, MexicoRuiz-Esparza, J, 296 H St,Suite 200, Chula Vista, CA 91910, USA TI - Nonablative radiofrequency for active acne vulgaris: The use of deep dermal heat in the treatment of moderate to severe active acne vulgaris (thermotherapy): A report of 22 patients AB - BACKGROUND. Acne vulgaris is an exceedingly common condition in adolescence and may extend into adult life in some individuals. Even though this condition is at times minimized, it has been found to have a profound impact in the quality of life of many affected individuals. Acne scarring can be even more of a source of psychological and social problems than active acne is, and when inadequately treated, the latter can lead to the former. Moderate and severe acne vulgaris usually require a regimen of systemic and/or topical medications, which are given for several months or even years and frequently require multiple visits to the physician office, the laboratory, etc. This results in loss of time at school and considerable expense. Side effects from medications and the frequent need to use alternative drugs when there is no response to medical treatment are possible. OBJECTIVE. To evaluate the role of a novel medical device that uses radiofrequency as a source of energy to produce volumetric tissue heating, while sparing the epidermis, allowing for a procedure with no down time and no postoperative care required. METHODS. Twenty-two patients, 10 women and 12 men, ranging in age from 16 to 28, with moderate to severe, scarring, cystic, active, acne vulgaris participated. Only nine of these patients were on concomitant medical treatment such as oral antibiotics or topical agents. All 22 patients were treated with a new nonablative radiofrequency unit, which delivers a concomitant spray of cryogen for epidermal sparing. One session was done in 20 patients and two sessions in 2 patients. The average fluence per energy delivery was 72 J/cm(2) . Follow-up ranged from 1 to 8 months. Patient questionnaires and active acne lesion counts were used to evaluate the response to treatment. RESULTS. Excellent response was seen in 82% (n =18). Modest response was seen in 9% (n =2), and no response was seen in 9% (n =2); t -test on active lesion counts before treatment and after treatment was less than 0.009004. No side effects were identified on any of these patients. No down time from the procedure was seen. Only topical anesthesia, ELA-Max 5% (Ferndale Labs, Ferndale, MI) was used; 59% of patients were on no acne medication before, during, or after the procedure. CONCLUSIONS. Nonablative radiofrequency appears to be a new safe and effective treatment alternative for moderate to severe acne vulgaris. Further research is in progress to evaluate this treatment modality in a larger number of patients MH - Mexico|Jalisco MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 23 U4 - Dermatology;Surgery U5 - J;Article AV - English IS - 1076-0512 UR - ISI:000181835300003 L2 - FACIAL ACNE; TOPICAL THERAPY; PREVALENCE; HYPERTHERMIA; ADOLESCENCE; ADULTS; SCARS; WARTS; SKIN SO - Dermatologic Surgery 2003 ;29(4):333-339 9393 UI - 8949 AU - Ruiz-Fernandez AC AU - Hillaire-Marcel C AU - Paez-Osuna F AU - Ghaleb B AU - Soto-Jimenez M AD - UNAM, Inst Ciencias Mar & Limnol, Mazatlan 82040, Sin, MexicoUniv Quebec, Ctr GEOTOP UQAM McGill, Montreal, PQ H2Y 3X7, CanadaUNAM, ICMyL, Postgrad Program Marine Sci & Limnol, Mazatlan 82040, Sin, MexicoRuiz-Fernandez, AC, UNAM, Inst Ciencias Mar & Limnol, Calz Joel Montes Camarena S-N, Mazatlan 82040, Sin, Mexico TI - Historical trends of metal pollution recorded in the sediments of the Culiacan River Estuary, Northwestern Mexico AB - The accumulation of selected trace metals (Cd, Co, Cu, Ni, Pb and Zn) was studied in a sediment core collected in a shallow sandy area at the upper estuary of the Culiacan River. The chronology was developed by using the accumulation rates determined previously from Pb-210 analyses of the same core. Trace metal concentration began to increase over background levels at depths corresponding to the late 40s and reached a maximum at the present time, excepting for Cd and Ph. The observed profile trends were related to population growth, and significant relationships between organic C and Cd, Cu and Zn indicated that such metals are mainly delivered to the estuarine sediments from a common source, identified as sewage wastes. Excess metal inventories and metal concentration factors indicated a slight pollution by all the trace metals examined, although levels of enrichment for Ni and Pb (Concentration Factors less than or equal to 1.5) were considerably less than those found for Co, Cd, Zn and Cu (CF'ssimilar to3). However, the concentrations of Cu, Pb and Ni were considered as potentially toxic and therefore, these metals must be considered pollutants of concern and further investigation (e.g. biological and chemical testing) is strongly recommended. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Sinaloa PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0883-2927 UR - ISI:000181572700007 L2 - LONG-ISLAND SOUND; CHEMICAL CONCENTRATIONS; PB-210; CHRONOLOGY; COASTAL; FLUXES; CS-137; RATES; SEA; CONTAMINATION SO - Applied Geochemistry 2003 ;18(4):577-588 9394 UI - 7291 AU - Ruiz-Garcia J AU - Moreno A AU - Brezesinski G AU - Mohwald H AU - Mas-Oliva J AU - Castillo R AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUASLP, Inst Fis, San Luis Potosi, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMax Planck Inst Colloids & Interfaces, D-14424 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoCastillo, R, Univ Nacl Autonoma Mexico, Inst Fis, POB 20-364, Mexico City 01000, DF, Mexico TI - Phase transitions and conformational changes in monolayers of human apolipoproteins CI and AII AB - We have studied monolayers of apolipoproteins Cl and All at the air/water interface, observing them along their isothermal compression processes with Brewster angle microscopy and using grazing incidence X-ray diffraction. The lateral order in Langmuir-Blodgett transferred proteins was also studied using atomic force microscopy (AFM). Previous studies have shown that APO CI consists of a chain with two amphiphilic alpha-helix motifs, whereas APO All is formed by two identical polypeptide chains, bonded by a disulfide bridge at position 6, where each chain consists also of two amphiphilic alpha-helix motifs. Monolayers of these proteins exhibit a first-order phase transition between two condensed phases at relatively high values of the lateral pressure and at room temperature. AFM images and X-ray diffraction peaks show that the phase transitions correspond to a phase change from a two-dimensional disordered phase to a more ordered state, where an unusual solid phase is discovered. Here, in each protein chain, one alpha-helix is confined to the interface, whereas the other alpha-helix is tilted toward the hydrophobic air MH - Germany MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000185756900021 L2 - SPECTROSCOPY; SEQUENCE; PEPTIDES; CD SO - Journal of Physical Chemistry B 2003 ;107(40):11117-11124 9395 UI - 7318 AU - Ruiz-Herrera J AU - Garcia-Maceira P AU - Castillo-Barahona LC AU - Valentin E AU - Sentandreu R AD - Univ Valencia, Fac Farm, Dept Microbiol, E-46100 Burjassot, SpainIPN, Ctr Invest & Estudios Avanzados, Dept Ingn Genet, Unidad Irapuato, Irapuato, Gto, MexicoSentandreu, R, Univ Valencia, Fac Farm, Dept Microbiol, Avgda Vicent Andres Estelles S-N, E-46100 Burjassot, Spain TI - Cell wall composition and structure of Yarrowia lipolytica transposon mutants affected in calcofluor sensitivity AB - A collection of transposon-mutagenized strains of Yarrowia lipolytica was screened for wall defects by determination of their sensitivity to calcofluor white. A number of strains were hypersensitive, whereas others were resistant. Different non-allelic mutants displayed increased sensitivity to autolysis and lytic enzymes, independently of whether they were sensitive or resistant to calcofluor white. A thorough analysis of their cell walls revealed minor quantitative alterations, and no significant changes in chitin content. Electrophoretic analysis of wall-bound and excreted proteins proved to be a sensitive method that revealed defects in the cell wall structure of the mutants. Important alterations in the patterns of the wall proteins extracted by SDS or by enzymatic treatments were noticed for the mutants, as compared to the parental strain. Mutants released to the growth medium a larger number of protein species than the parental strain, suggesting impairment in wall assembly of certain polypeptides. Patterns of wall-bound and excreted proteins, as well as alterations in wall chemical composition were not diagnostic of calcofluor white sensitivity or resistance, but were specific for each mutant. Our data show that an increase in either sensitivity or resistance of Y. lipolytica to certain levels of calcofluor is equally indicative of alterations in cell wall structure, independent of chitin levels MH - Mexico|Guanajuato MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Microbiology U5 - J;Article AV - English IS - 0003-6072 UR - ISI:000185682200010 L2 - calcofluor white;lytic enzymes;wall mutants;wall proteins;SACCHAROMYCES-CEREVISIAE; COLORIMETRIC METHOD; CANDIDA-ALBICANS; YEAST; IDENTIFICATION; PROTEINS; WHITE; GENES; ELECTROPHORESIS; ARCHITECTURE SO - Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 2003 ;84(3):229-238 9396 UI - 8615 AU - Ruiz-Palacios GM AU - Cervantes LE AU - Ramos P AU - Chavez-Munguia B AU - Newburg DS AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Expt Pathol, Mexico City 07360, DF, MexicoUniv Massachusetts, Sch Med, Shriver Ctr, Program Glyobiol, Waltham, MA 02452, USARuiz-Palacios, GM, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infect Dis, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Campylobacter jejuni binds intestinal H(O) antigen (Fuc alpha 1, 2Gal beta 1, 4GlcNAc), and fucosyloligosaccharides of human milk inhibit its binding and infection AB - The most common cause of infant mortality is diarrhea; the most common cause of bacterial diarrhea is Campylobacter jejuni, which is also the primary cause of motor neuron paralysis. The first step in campylobacter pathogenesis is adherence to intestinal mucosa. We found that such binding was inhibited in vitro by human milk and, with high avidity, by alpha1,2-fucosylated carbohydrate moieties containing the H(O) blood group epitope (Fucalpha1,2Galbeta1,4GlcNAc...). In studies on the mechanism of adherence, campylobacter, which normally does not bind to Chinese hamster ovary cells, bound avidly when the cells were transfected with a human alpha1,2-fucosyltransferase gene that caused overexpression of H-2 antigen; binding was specifically inhibited by H-2 ligands (lectins Ulex europaeus and Lotus tetragonolobus and H-2 monoclonal antibody), H-2 mimetics, and human milk oligosaccharides. Human milk oligosaccharides inhibited campylobacter colonization of mice in vivo and human intestinal mucosa ex vivo. Campylobacter colonization of nursing mouse pups was inhibited if their dams had been transfected with a human alpha1,2-fucosyltransferase gene that caused expression of H(O) antigen in milk. We conclude that campylobacter binding to intestinal H-2 antigen is essential for infection. Milk fucosyloligosaccharides and specific fucosyl alpha1,2-linked molecules inhibit this binding and may represent a novel class of antimicrobial agents MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 45 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000182405000072 L2 - BLOOD-GROUP ANTIGENS; EPITHELIAL-CELLS; ESCHERICHIA-COLI; HELICOBACTER-PYLORI; TOXIN PRODUCTION; SUCKLING MICE; ENTERO-TOXIN; OLIGOSACCHARIDES; EXPRESSION; RECOGNITION SO - Journal of Biological Chemistry 2003 ;278(16):14112-14120 9397 UI - 7521 AU - Ruiz MT AU - Peimbert A AU - Peimbert M AU - Esteban C AD - Univ Chile, Dept Astron, Santiago, ChileUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainRuiz, MT, Univ Chile, Dept Astron, Casilla Postal 36D, Santiago, Chile TI - Very Large Telescope Echelle Spectrophotometry of the planetary nebula NGC 5307 and temperature variations AB - Echelle spectrophotometry of the planetary nebula NGC 5307 is presented. The data consist of Very Large Telescope Ultraviolet Visual Echelle Spectrograph observations in the 3100 - 10360 Angstrom range. Electron temperatures and densities have been determined using different line intensity ratios. We determine the H, He, C, and O abundances based on recombination lines; these abundances are almost independent of the temperature structure of the nebula. We also determine the N, O, Ne, S, Cl, and Ar abundances based on collisionally excited lines; the ratios of these abundances relative to that of H depend strongly on the temperature structure of the nebula. From the O II/[ O III] line intensity ratios we find a t(2) = 0.056 +/- 0.005. The chemical composition of NGC 5307 is compared with those of the Sun and the Orion Nebula. From the study of the relative intensities of the O II recombination lines of multiplet 1 in this and other nebulae, it is found that for electron densities smaller than about 5000 cm(-3) collisional redistribution is not complete; this effect has to be taken into account to derive the O abundances for those cases in which not all the lines of the multiplet are observed. From the O II lambda4649 versus N-e(Cl III) diagram we find a critical electron density of 1325 cm(-3) for collisional redistribution of the O II lines of multiplet 1. Based on this diagram, we also argue that the O II and the [O III] lines originate in the same regions. We also find that the radial velocities and the FWHM of the O II and [O III] lines in NGC 5307 are similar, supporting the previous result. These two results imply that for NGC 5307 and probably for many other gaseous nebulae chemical inhomogeneities are not responsible for the large temperature fluctuations observed MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185338300022 L2 - ISM : abundances;planetary nebulae : general;planetary nebulae : individual (NGC 5307);OPTICAL RECOMBINATION LINES; H-II REGIONS; CHEMICAL-COMPOSITION; GASEOUS NEBULAE; EMISSION-LINES; ORION-NEBULA; PHOTOIONIZATION MODELS; HYDROGENIC IONS; HEAVY-ELEMENTS; HII-REGIONS SO - Astrophysical Journal 2003 ;595(1):247-258 9398 UI - 7321 AU - Ruiz V AU - Ordonez RM AU - Berumen J AU - Ramirez R AU - Uhal B AU - Becerril C AU - Pardo A AU - Selman M AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoHosp Gen Mexico City, SSA, Mexico City 06720, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoMichigan State Univ, Dept Physiol, E Lansing, MI 48824, USASelman, M, Inst Nacl Enfermedades Resp, Tlalpan 4502,Col Secc 16, Mexico City 14080, DF, Mexico TI - Unbalanced collagenases/TIMP-1 expression and epithelial apoptosis in experimental lung fibrosis AB - In this study, we examined the sequential expression of several matrix metalloproteinases ( MMPs), tissue inhibitors of metalloproteinases (TIMPs), and growth factors as well as the presence of apoptosis in a model of pulmonary fibrosis induced in rats with paraquat and hyperoxia. Animals showing neither clinical nor morphological changes with this double aggression were classified as "resistant". Rats were killed at 1, 2, 3, and 6 wk, and lungs were used for collagen content, gene expression by real-time PCR, gelatinolytic activity by zymography, apoptosis by in situ DNA fragmentation, and protein localization by immunohistochemistry. Our results showed a significant decrease of collagenases MMP-8 and MMP-13, with an increase of TIMP-1 and transforming growth factor-beta. Immunoreactive TIMP-1 was increased in experimental rats and primarily localized in alveolar macrophages. Expression of gelatinases MMP-2 and MMP-9 mRNAs was not affected, but lung zymography revealed an increase in progelatinase B, progelatinase A, and its active form. Epithelial apoptosis was evident from the first week, whereas at later periods, interstitial cell apoptosis was also noticed. Resistant animals behave as controls. These findings suggest that an imbalance between collagenases and TIMPs, excessive gelatinolytic activity, and epithelial apoptosis participate in the fibrotic response in this experimental model MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physiology;Respiratory System U5 - J;Article AV - English IS - 1040-0605 UR - ISI:000185822300007 L2 - gelatinases;tissue inhibitor of metalloproteinases-1;GROWTH-FACTOR-BETA; IDIOPATHIC PULMONARY-FIBROSIS; TISSUE INHIBITOR; MATRIX METALLOPROTEINASES; EXTRACELLULAR-MATRIX; GENE-EXPRESSION; MESSENGER-RNA; INTERSTITIAL COLLAGENASE; UP-REGULATION; CELL-DEATH SO - American Journal of Physiology-Lung Cellular and Molecular Physiology 2003 ;285(5):L1026-L1036 9399 UI - 7952 AU - Rulkov NF AU - Afraimovich VS AD - Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAUniv Autonoma San Luis Potosi, Inst Invest Commun Opt, San Luis Potosi, MexicoRulkov, NF, Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093 USA TI - Detectability of nondifferentiable generalized synchrony AB - Generalized synchronization of chaos is a type of cooperative behavior in directionally coupled oscillators that is characterized by existence of stable and persistent functional dependence of response trajectories from the chaotic trajectory of driving oscillator. In many practical cases this function is nondifferentiable and has a very complex shape. The generalized synchrony in such cases seems to be undetectable, and only the cases in which a differentiable synchronization function exists are considered to make sense in practice. We show that this viewpoint is not always correct and the nondifferentiable generalized synchrony can be revealed in many practical cases. Conditions for detection of generalized synchrony are derived analytically, and illustrated numerically with a simple example of nondifferentiable generalized synchronization MH - USA MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000184085000052 L2 - COUPLED DYNAMICAL-SYSTEMS; CHAOTIC SYSTEMS; PHASE SYNCHRONIZATION; INVARIANT GRAPHS; FORCED SYSTEMS SO - Physical Review e 2003 ;67(6): 9400 UI - 7914 AU - Rull J AU - Prokopy RJ AU - Vargas RI AD - Inst Ecol AC, Xalapa 91070, Veracruz, MexicoUniv Massachusetts, Dept Entomol, Amherst, MA 01003, USAARS, USDA, Hilo, HI, USARull, J, Inst Ecol AC, Km 2-5 Antigua Carretera Coatepec, Xalapa 91070, Veracruz, Mexico TI - Effects of conspecific presence on arrival and use of hosts in Ceratitis capitata flies AB - To reach a better understanding of the factors that affect Mediterranean fruit flies', Ceratitis capitata (Wiedemann) (medflies'), arrival at and use of hosts, we evaluated the alighting and boring propensity of sexually mature high-egg load medfly females that were grouped with conspecifics or held in isolation for 4 days prior to testing. To avoid confounding effects that may have been responsible for conflicting results in previous studies, we exposed groups of free-foraging females to odorless artificial fruit (parafilm-covered agar spheres) in a rotating cage containing small potted host trees and kept experimental intervention to a minimum. Our protocol involved releasing cohorts of 24 females in a patch containing only two such low-quality "hosts." In such circumstances, grouped females preferred to alight in significantly greater numbers on artificial fruit occupied by conspecifics than on unoccupied hosts and displayed a significantly greater propensity to oviposit in fruit in the presence than the absence of conspecifics. We did not detect differences in egg load or body size between intruders and residents or between winners and losers of contests. We conclude that as in adaptive superparasitism, the presence of conspecifics may enhance the propensity of fruit-foraging medflies to alight on and use scarce low-quality hosts MH - Mexico|Veracruz MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 6 U4 - Entomology U5 - J;Article AV - English IS - 0892-7553 UR - ISI:000184253900002 L2 - attraction;conspecifics;grouping;alighting;egg-laying;medfly;SOCIALLY FACILITATED BEHAVIOR; MEDITERRANEAN FRUIT-FLIES; PATCH TIME ALLOCATION; RHAGOLETIS-POMONELLA; ADAPTIVE SUPERPARASITISM; SOLITARY PARASITOIDS; FITNESS CONSEQUENCES; COMPETITION; FLY; TEPHRITIDAE SO - Journal of Insect Behavior 2003 ;16(3):329-346 9401 UI - 9164 AU - Rull J AU - Prokopy RJ AD - Univ Massachusetts, Dept Entomol, Amherst, MA 01003, USARull, J, Inst Ecol AC, Dept Ecol & Comportamiento Anim, Km 2-5 Carretera Antigue Coatepec Congregac Haya, Mexico City 91070, DF, Mexico TI - Trap position and fruit presence affect visual responses of apple maggot flies (Dipt., Tephritidae) to different trap types AB - We compared responses of apple maggot flies, Rhagoletis pomonella (Walsh), in a commercial apple orchard in Massachusetts with three different types of visual traps baited with synthetic fruit volatiles. The traps were red spheres, Ladd traps (a rectangular yellow panel between two red hemispheres) and rectangular yellow panels. Traps were placed either in optimal position (Drummond, F.; Groden, E.; Prokopy, R. J., 1984: Environ. Entomol. 13, 232-235.) or sub-optimal position (not surrounded by foliage and fruit from all sides). The study was performed over 3 years. Early in the fruiting season, when apples were small and green, red spheres followed by Ladd traps attracted more flies than yellow panels. Ladd traps were the most sensitive to trap positioning, losing effectiveness when placed in sub-optimal position. Late in the fruiting season, in years yielding crops of large red apples, red spheres in optimal position (surrounded by growing red fruit) lost some effectiveness relative to Ladd traps in optimal position. Red spheres in sub-optimal position were not similarly affected, perhaps because of the lack of fruit in the background. Red sphere performance relative to Ladd traps was re-established after removal of competing fruit from trees at harvest. Because Ladd traps are more expensive to purchase and more difficult to position, red spheres are a better option for commercial growers in eastern North America. Conceivably, loss of capturing power of red spheres because of visual competition from red apples towards harvest could be mitigated by adjusting trap positioning MH - Mexico|Distrito Federal MH - USA PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0931-2048 UR - ISI:000181076700004 L2 - RHAGOLETIS-POMONELLA WALSH; RED SPHERES; FLY RESPONSE; ODOR; ATTRACTANTS; VOLATILES; TESTS SO - Journal of Applied Entomology-Zeitschrift fur Angewandte Entomologie 2003 ;127(2):85-90 9402 UI - 6824 AU - Rusanov AL AU - Komarova LG AU - Likhatchev DY AU - Shevelev SA AU - Tartakovsky VA AD - Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 119991, RussiaNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoRussian Acad Sci, ND Zelinskii Organ Chem Inst, Moscow 119991, RussiaRusanov, AL, Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, 28 Ul Vavilova, Moscow 119991, Russia TI - Condensation monomers and polymers based on 2,4,6-trinitrotoluene AB - Within the bounds of research dealing with the problem of conversion of 2,4,6-trinitrotoluene, the possibility of transforming it into condensation monomers (nitro compounds, diamines, and so on) and the use of these monomers in the synthesis of aromatic polymers are analysed. The application of aromatic dinitro compounds and diamines for the preparation of oligomeric polyesters and polyamides (or polyimides), respectively, is considered. The possibility of synthesis of polyamides and polyimides with side aliphatic and aromatic groups possessing enhanced characteristics compared to the corresponding unsubstituted polymers is demonstrated MH - Mexico|Distrito Federal MH - Russia PB - MOSCOW: MEZHDUNARODNAYA KNIGA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary U5 - J;Review AV - Russian IS - 0042-1308 UR - ISI:000186794700004 L2 - AROMATIC TETRACARBOXYLIC DIANHYDRIDES; BENZOTHIAZOLE PENDENT GROUPS; KEVLAR-TYPE POLYARAMIDES; ONE-STEP SYNTHESIS; SOLUBLE POLYIMIDES; HYPERBRANCHED POLYMERS; TEREPHTHALIC ACIDS; DENDRITIC POLYMERS; DIAMINES; POLYAMIDES SO - Uspekhi Khimii 2003 ;72(10):1011-1024 9403 UI - 7181 AU - Rush EC AU - Puniani K AU - Valencia ME AU - Davies PSW AU - Plank LD AD - Univ Auckland, Dept Appl Sci, Auckland 1020, New ZealandCtr Invest Alimentac & Desarrollo AC, Div Nutr, Hermosillo, Sonora, MexicoUniv Queensland, Royal Childrens Hosp, Childrens Nutr Res Ctr, Dept Paediat & Child Hlth, Brisbane, Qld, AustraliaUniv Auckland, Dept Surg, Auckland 1, New ZealandRush, EC, Univ Auckland, Dept Appl Sci, Private Bag 92006, Auckland 1020, New Zealand TI - Estimation of body fatness from body mass index and bioelectrical impedance: comparison of New Zealand European, Maori and Pacific Island children AB - Objective: To compare percentage body fat (%BF) for a given body mass index (BMI) among New Zealand European, Maori and Pacific Island children. To develop prediction equations based on bioimpedance measurements for the estimation of fat-free mass (FFM) appropriate to children in these three ethnic groups. Design: Cross-sectional study. Purposive sampling of schoolchildren aimed at recruiting three children of each sex and ethnicity for each year of age. Double cross-validation of FFM prediction equations developed by multiple regression. Setting: Local schools in Auckland. Subjects: Healthy European, Maori and Pacific Island children (n = 172, 83 M, 89 F, mean age 9.4 +/- 2.8(s. d.), range 5 - 14 y). Measurements: Height, weight, age, sex and ethnicity were recorded. FFM was derived from measurements of total body water by deuterium dilution and resistance and reactance were measured by bioimpedance analysis. Results: For fixed BMI, the Maori and Pacific Island girls averaged 3.7% lower % BF than European girls. For boys a similar relation was not found since BMI did not significantly influence % BF of European boys ( P = 0.18). Based on bioimpedance measurements a single prediction equation was developed for all children: FFM (kg) = 0.622 height (cm)(2)/ resistance +0.234 weight (kg)+1.166, R-2 = 0.96, s. e. e. = 2.44 kg. Ethnicity, age and sex were not significant predictors. Conclusions: A robust equation for estimation of FFM in New Zealand European, Maori and Pacific Island children in the 5 - 14 y age range that is more suitable than BMI for the determination of body fatness in field studies has been developed. Sponsorship: Maurice and Phyllis Paykel Trust, Auckland University of Technology Contestable Grants Fund and the Ministry of Health MH - Australia MH - Mexico|Sonora MH - New Zealand PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 11 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0954-3007 UR - ISI:000186135600005 L2 - child;ethnic groups;electric impedance;body composition;CROSS-VALIDATION; FAT; PREDICTION; CHILDHOOD; ADULTS; ADOLESCENCE; ASSOCIATION; PERCENTAGE; OVERWEIGHT; NUTRITION SO - European Journal of Clinical Nutrition 2003 ;57(11):1394-1401 9404 UI - 6601 AU - Russell CT AU - Blanco-Cano X AU - Wang YL AU - Kivelson MG AD - Univ Calif Los Angeles, Dept Earth & Space Sci, Inst Geophys & Planetary Sci, Los Angeles, CA 90095, USANatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoRussell, CT, Univ Calif Los Angeles, Dept Earth & Space Sci, Inst Geophys & Planetary Sci, 3845 Slichter Hall,MS156704, Los Angeles, CA 90095 USA TI - Ion cyclotron waves at Io: implications for the temporal variation of Io's atmosphere AB - When the flowing torus plasma encounters the upper atmosphere of Jupiter's moon, Io, newly created ions are rapidly accelerated by the motional electric field. Many of these ions are reneutralized and form a spray of fast neutrals that travel far away from Io before being reionized by photoionization and impact. These ions, now far from Io, are unstable to the generation of ion cyclotron waves. These waves in turn act as a mass spectrometer allowing Galileo magnetic measurements to be used to probe the composition of the atmosphere of Io and how it varies in time and in space. We now have six Galileo passes by Io on which we have measurements with sufficient cadence to examine the ion cyclotron waves. One of these passes, on Galileo's 32nd orbit has not been discussed previously. These passes provide sufficient observations to begin to distinguish the sources of variability. We find that while the atmosphere of Io varies temporally throughout the mission, it also has a spatial variation in composition at any instant of time. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0032-0633 UR - ISI:000187568300004 L2 - Io torus;Io atmosphere;ion cyclotron waves;MASS-LOADING DISK; TORUS SO - Planetary and Space Science 2003 ;51(14-15):937-944 9405 UI - 7174 AU - Ryabov AD AU - Soukharev VS AU - Alexandrova L AU - Le Lagadec R AU - Pfeffer M AD - Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213, USAGV Plekhanov Russian Econ Acad, Div Chem, Moscow 113054, RussiaNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Strasbourg 1, CNRS, UMR 7513, Lab Synth Metallo Induites, F-67070 Strasbourg, FranceRyabov, AD, Carnegie Mellon Univ, Dept Chem, 4400 5th Ave, Pittsburgh, PA 15213 USA TI - Low-potential cyclometalated osmium(II) mediators of glucose oxidase AB - The osma(II)cycles [Os(phpy)(LL)(2)]PF6 (LL = 1,10-phen (3a) and 4,4'-Me-2-2,2'-bpy (3b)) are made from [(eta(6)-C6H6)Os(mu-Cl)Cl](2) (1) either via transmetalation using the [Hg(phpy)(2)] organomercurial in MeOH or via the sp(2)-C-H bond cleavage of 2-phenylpyridine (phpyH) in MeCN to afford [(eta(6) -C6H6)Os(phpy)Cl] or [(eta(6)-C6H6)Os(phpy)(MeCN)]PF6, respectively. The latter two react cleanly with LL to give 3a and 3b, the M-II/III redox potentials of which equal 30 and -100 mV (vs Ag/AgCl), respectively. The electrochemically made Os-III species oxidize rapidly reduced glucose oxidase. The second-order rate constant equals 1.1 x 101 M-1 s(-1) for 3a at 25 degreesC, pH 7 MH - France MH - Mexico|Distrito Federal MH - USA MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000186023900005 L2 - ASPERGILLUS-NIGER; CRYSTAL-STRUCTURE; REDOX PROTEINS; COMPLEXES; LIGAND; RUTHENIUM(II); OXIDATION; DERIVATIVES; 1,10-PHENANTHROLINE; ELECTRODES SO - Inorganic Chemistry 2003 ;42(21):6598-6600 9406 UI - 7172 AU - Rzeznicka I AU - Moula MG AU - de la Garza LM AU - Ohno Y AU - Matsushima T AD - Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0600811, JapanHokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 0600810, JapanUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoMatsushima, T, Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0600811, Japan TI - CO2 desorption dynamics on specified sites and surface phase transitions of Pt(110) in steady-state CO oxidation AB - The spatial and velocity distributions of desorbing product CO2 were studied in the steady-state CO oxidation on Pt(110) by cross-correlation time-of-flight techniques. The surface structure transformation was monitored by LEED in the course of the catalyzed reaction. In the active region, where the surface was highly reconstructed into the missing-row form, CO2 desorption split into two directional lobes collimated along 25degrees from the surface normal in the plane including the [001] direction, indicating the CO2 formation on inclined (111) terraces. The translational temperature was maximized at the collimation angle, reaching about 1900 K. On the other hand, CO2 desorption sharply collimated along the surface normal at CO pressures where (1x2) domains disappeared. The distribution change from an inclined desorption to a normally directed one was abrupt at the CO pressure where the half-order LEED spot already disappeared. This switching point was more sensitive than LEED towards the complete transformation from (1x2) to (1x1) and was then used to construct a surface phase diagram for working reaction sites in the pressure range from 1x10(-7) Torr to 1x10(-4) Torr of oxygen. The turnover frequency of CO2 formation was enhanced on (1x2) domains with increasing CO pressure. (C) 2003 American Institute of Physics MH - Japan MH - Mexico|Baja California PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000186138700058 L2 - CARBON-DIOXIDE DESORPTION; SPATIAL-DISTRIBUTION; DESORBING PRODUCT; STRUCTURAL TRANSFORMATION; VELOCITY DISTRIBUTIONS; CATALYTIC-OXIDATION; THERMAL-DESORPTION; MONOXIDE OXIDATION; MOLECULAR-BEAM; PLATINUM SO - Journal of Chemical Physics 2003 ;119(18):9829-9841 9407 UI - 7386 AU - Saad AF AU - Talaat TM AU - Atwa ST AU - Espinosa G AU - Fujii M AD - Zagazig Univ, Fac Sci, Dept Phys, Zagazig, EgyptZagazig Univ, Fac Sci, Dept Chem, Banha, EgyptUNAM, Inst Fis, Mexico City 01000, DF, MexicoAomori Univ, Fac Engn, Aomori, JapanSaad, AF, Zagazig Univ, Fac Sci, Dept Phys, Zagazig, Egypt TI - Determination of the uranium content of Egyptian phosphate ores by passive and active detectors AB - Uranium contents of phosphate ores and fertilizers collected from El-Sobaeya and El-Suez mines in Egypt were determined by measuring the radon emanated from these samples. In our method, neither direct contact of CR-39 track detectors to the samples nor thermal neutron activation process is required. The concentration of Rn-222 in the emanation container (Genitron Instruments GmbH) is dependent on the uranium deposited in the phosphate sample. The CR-39 and a pulse ionization chamber, Alpha GUARD PQ-2000 (Genitron Instruments GmbH) were simultaneously used for radon detection. The detection efficiency of CR-39 was calibrated with the Alpha GUARD. The uranium content determinations were performed using a high-resolution inductively coupled plasma mass spectrometer for comparison. The measurements revealed a very high uranium content, 355 ppm for ore and 118 ppm for fertilizer from El-Sobaeya mine, while it was 7 ppm for fertilizer from El-Suez. Although the uranium content of ores from El-Sobaeya mine is within permissible limit for the manufacturing of fertilizers, the phosphate ore from El-Suez is much safer for fertilizers. (C) 2003 Elsevier Ltd. All rights reserved MH - Egypt MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000185503400107 L2 - uranium content;CR-39;diffusion cup;filter paper;alpha GUARD;plasma mass spectrometer;SAMPLES SO - Radiation Measurements 2003 ;36(1-6):561-565 9408 UI - 7865 AU - Sabin M AU - Cardozo BL AU - Nackerud L AU - Kaiser R AU - Varese L AD - Univ Georgia, Sch Social Work, Athens, GA 30602, USACtr Dis Control & Prevent, Natl Ctr Environm Hlth, Int Emergencies & Refugee Hlth Branch, Atlanta, GA, USAUN High Commissioner Refugees, Suboff, Chiapas, MexicoSabin, M, Univ Georgia, Sch Social Work, Tucker Hall, Athens, GA 30602 USA TI - Factors associated with poor mental health among Guatemalan refugees living in Mexico 20 years after civil conflict AB - Context From 1981 to 2001, 46000 refugees who fled the 36-year civil conflict in Guatemala for Chiapas, Mexico were under the protection of the United Nations High Commissioner for Refugees. Objectives To estimate the prevalence of mental illness and factors associated with poor mental health of underserved Guatemalan refugee communities located in Chiapas, Mexico, since 1981 and to assess need for mental health services. Design, Setting, and Participants Cross-sectional survey of 183 households in 5 Mayan refugee camps in Chiapas representing an estimated 1546 residents (adults and children) conducted November-December 2000. Main Outcome Measures Symptom criteria of Posttraumatic Stress Disorder (PTSD), anxiety, and depression,as measured by the Harvard Trauma Questionnaire and Hopkins Symptom Checklist-25 (Hopkins-25). Results One adult (aged greater than or equal to16 years) per household (n = 170 respondents) who agreed to participate was included in the analysis, representing an estimated 93% of households. All respondents reported experiencing at least 1 traumatic event with a mean of 8.3 traumatic events per individual. Of the respondents, 20 (11.8%) had all symptom criteria for PTSD. Of the 160 who completed the Hopkins Symptom Checklist-25, 87 (54.4%) had anxiety symptoms and 62 (38.8%) had symptoms of depression. Witnessing the disappearance of family members (adjusted odds ratio [AOR], 4.58; 95% confidence interval [CI], 1.35-15.50), being close to death (AOR, 4.19, 95% 6, 1.03-17.00), or living with 9 to 15 persons in the same home (AOR, 3.69; 95% CI, 1.19-11.39) were associated with symptoms of PTSD. There was a protective factor found for lacking sufficient food (AOR, 0.08; 95% CI, 0.01-0.59). Elevated anxiety symptoms were associated with witnessing a massacre (AOR, 10.63; 95% CI, 4.31-26.22), being wounded (AOR, 3.22; 95% CI, 0.95-10.89), and experiencing 7 to 12 traumatic events (AOR, 2.67; 95% CI, 1.14-6.27) and 13 to 19 traumatic events (AOR, 2.26; 95% CI, 0.65-7.89). Elevated symptoms of depression were associated with being a woman (AOR, 3.64; 95% CI, 1.47-9.04), being widowed (AOR, 27.55; 95% CI, 2.54-299.27), being married (AOR, 1.93; 95% CI, 0.59-6.33), witnessing disappearances (AOR, 2.68; 95% CI, 1.16-6.19), experiencing 7 to 12 traumatic events (AOR, 1.57; 95% CI, 0.64-3.88), or experiencing 13 to 19 traumatic events (AOR, 7.44; 95% CI, 2.18-25.37). Conclusion Psychiatric morbidity related to human rights violations, traumatic events, and refugee status was common among Guatemalan refugees surveyed 20 years after the Guatemalan civil conflict MH - Mexico|Chiapas MH - USA PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 24 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0098-7484 UR - ISI:000184558500018 L2 - POSTTRAUMATIC-STRESS-DISORDER; POLITICAL REPRESSION; BOSNIAN REFUGEES; CHILDREN; TRAUMA; INSTRUMENT; DISABILITY; TERRORISM; THAILAND; SYMPTOMS SO - Jama-Journal of the American Medical Association 2003 ;290(5):635-642 9409 UI - 8403 AU - Sacco LM AU - Caulfield LE AU - Gittelsohn J AU - Martinez H AD - Johns Hopkins Bloomberg Sch Hyg & Publ Hlth, Ctr Human Nutr, Baltimore, MD 21205, USAJohns Hopkins Univ, Baltimore, MD 21205, USAInst Mexicano Seguro Social, Coordinac Inves Salud, Mexico City, DF, Mexico TI - Ethnomedical model of perceived insufficient milk: how does infant crying behavior fit into the picture MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181733103446 SO - Faseb Journal 2003 ;17(4):A733-A733 9410 UI - 5093 AU - Saenz-Romero C AU - Snively AE AU - Lindig-Cisneros R AD - Univ Michoacana, Inst Invest Recursos Nat, Morelia 58141, Michoacan, MexicoCent Washington Univ, Ellensburg, WA 98926, USAUniv Michoacana, Inst Invest Quim Biol, Fac Biol, Morelia 58040, Michoacan, MexicoSaenz-Romero, C, Univ Michoacana, Inst Invest Recursos Nat, Apdo Postal 12,Adm La Colina, Morelia 58141, Michoacan, Mexico TI - Conservation and restoration of pine forest genetic resources in Mexico AB - Deforestation rates in Mexico are about 670,000 ha/year. This threatens the richness of forest genetic resources in Mexico, causing the disappearance of locally adapted populations and rare and endangered pine species. Mexico is one of the six megadiverse countries in the world, with half of the world's Pinus species. Pinus is one of the most economically and ecologically important forest genera in Mexico. We suggest that delineation of seed zones and the establishment of a network of Forest Genetic Resource Conservation Units (FGRCUs), linked with forest management and ecological restoration programs will protect this valuable resource. We estimate that FGRCUs should include 25 to 50 ha each, with at least one FGRCU for each priority species in each seed zone. We highlight the need for studies of adaptive genetic variation among pine populations and for new methodologies and techniques to suit ecological restoration under Mexican forest conditions. We briefly describe ongoing research on these topics on forests owned by a well-organized indigenous community in Nuevo San Juan Parangaricutiro, Michoacan, western Mexico MH - Mexico|Michoacan MH - USA PB - FRANKFURT: J D SAUERLANDERS VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Forestry;Genetics & Heredity U5 - J;Article AV - English IS - 0037-5349 UR - ISI:000222360500011 L2 - Pinus;genetic resources;adaptive genetic variation;conservation;biodiversity;reforestation;ecological restoration;seed zones;Mexico;CARBON EMISSIONS; BOREAL FORESTS; MATING SYSTEM; DIVERSITY; MAXIMARTINEZII; SUSCEPTIBILITY; STRATEGIES; PINACEAE; PINYON; TREES SO - Silvae Genetica 2003 ;52(5-6):233-237 9411 UI - 7854 AU - Saenz A AU - Montero ML AU - Mondragon G AU - Rodriguez-Lugo V AU - Castano VM AD - UNAM, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro, Queretaro, MexicoUniv Costa Rica, Escuela Fis, San Jose, Costa RicaUniv Autonoma Estado Morelos, Cuernavaca, Morelos, MexicoUniv Costa Rica, Ctr Invest Ciencia Ingen Mat, San Jose, Costa RicaUniv Costa Rica, Escuela Quim, San Jose, Costa RicaInst Nacl Invest Nucl, Mexico City 06100, DF, MexicoBenemerita Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoCastano, VM, UNAM, Ctr Fis Aplicada & Tecnol Avanzada, AP 1-1010, Queretaro, Queretaro, Mexico TI - Effect of pH on the precipitation of hydroxyapatite on silica gels AB - Silica-HAp composites have been produced with particle size ranging from several nm to few mum, through control of the pH of the solution, which also controls morphology. A calcium ions reservoir has been made available as a Ca/EDTA soluble complex allowing the production of HAp at low temperature and short periods of time (hours). The presence of silica seems to promote the formation of HAp under these conditions MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Puebla MH - Mexico|Queretaro PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1432-8917 UR - ISI:000184279100004 L2 - chemical synthesis;biomaterials;ceramics;hydroxyapatite;crystal morphology;CERAMICS SO - Materials Research Innovations 2003 ;7(2):68-73 9412 UI - 8964 AU - Saenz A AU - Salas P AU - Rivera E AU - Montero ML AU - Castano M AD - Univ Costa Rica, Escuela Fis, San Jose, Costa RicaUNAM, Inst Fis, Queretaro 76000, MexicoSaenz, A, Univ Costa Rica, Escuela Fis, San Jose, Costa Rica TI - Synthesis of advanced materials via the sol-gel route MH - Costa Rica MH - Mexico|Queretaro PB - POULTON: MATRICE TECHNOLOGY LIMITED RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1066-7857 UR - ISI:000181388800010 L2 - THERMOLUMINESCENCE; GLASS SO - Materials Technology 2003 ;18(1):25-29 9413 UI - 8850 AU - Saenz L AU - Jones LH AU - Oropeza C AU - Vlacil D AU - Strnad M AD - ASCR, Inst Expt Bot, Lab Growth Regulat, Olomouc 78371, Czech RepublicPalacky Univ, Olomouc 78371, Czech RepublicCtr Invest Cient Yucatan, Merida 97310, Yucatan, MexicoInst Hyg, Olomouc 77200, Czech RepublicStrnad, M, ASCR, Inst Expt Bot, Lab Growth Regulat, Stechtitelu 11, Olomouc 78371, Czech Republic TI - Endogenous isoprenoid and aromatic cytokinins in different plant parts of Cocos nucifera (L.) AB - The present study reports the analyses of both isoprenoid and aromatic cytokinins in the coconut palm by combined high performance liquid chromatography and group specific enzyme immunoassays ( HPLC- ELISA). The results showed that the isoprenoid cytokinins were several fold more abundant than the aromatic cytokinins in each of the plant parts analysed: immature inflorescence, shoot apical meristem ( SAM), spear leaf and embryo. Within the isoprenoid cytokinins, the most abundant ones by type were the zeatin- ( Z-), the isopentenyladenine( iP-) and the dihydrozeatin- ( DHZ-) type in decreasing order for most plant parts studied, and individually, zeatin riboside ( ZR) or zeatin riboside- 5 '- monophosphate ( ZR5' P) depending on the part. In the case of the iP- type cytokinins, the results showed that its 9- glucoside was the most abundant one in most parts. The isoprenoid cytokinin profiles in coconut showed a predominant pattern of 9- conjugation as a major metabolism route for these cytokinins. Analyses also showed the occurrence of the aromatic cytokinin 6- benzylaminopurine ( BAP) and its riboside ( BAPR), 9- glucoside ( BAP9G), and nucleotide ( BAPR5' P). Their presence in coconut palm was unequivocally identified after permethylation by gas chromatography- mass spectrometry. They were more concentrated in the embryo and in the immature inflorescence than in the other two parts studied, however their concentration in each part was several times lower than that of isoprenoid cytokinins. All four were detected in each of the parts studied. The most abundant ones were BAPR and BAP9G in immature inflorescence; and BAPR in all of the other parts. When all cytokinins analysed are considered, differences between the plant parts studied were found. The zygotic embryos showed the highest content, double that in immature inflorescence, and five times more that in spear leaf and SAM. These differences are even greater when individual cytokinins are compared MH - Czech Republic MH - Mexico|Yucatan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0167-6903 UR - ISI:000181743900002 L2 - Cocos nucifera;cytokinin identification;cytokinin quantification;GC-MS;HPLC-ELISA;GERMINATING LUPIN SEEDS; ELAEIS-GUINEENSIS JACQ; X CANADENSIS MOENCH; CV ROBUSTA LEAVES; RICINUS-COMMUNIS; IDENTIFICATION; SEEDLINGS; CULTURE; PALM; RADIOIMMUNOASSAY SO - Plant Growth Regulation 2003 ;39(3):205-215 9414 UI - 10068 AU - Sagues AA AU - Pech-Canul MA AU - Al-Mansur AKMS AD - Univ S Florida, Coll Engn, Dept Civil & Environm Engn, Tampa, FL 33620, USAIPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Merida, Yuc, MexicoSagues, AA, Univ S Florida, Coll Engn, Dept Civil & Environm Engn, Tampa, FL 33620 USA TI - Corrosion macrocell behavior of reinforcing steel in partially submerged concrete columns AB - The corrosion behavior of reinforcing steel embedded in laboratory concrete columns partially submerged in a 5% NaCl solution, under different wetting conditions of the region above water line, has been investigated. A macrocell corrosion pattern developed in the test columns, with steel in the upper portions of the columns being mainly the site of the oxygen reduction reaction and a small passive current. When the columns were dry or partially moist, the cathodic reaction in the upper portions of the columns was primarily under activation polarization, while under full wetting nearly complete diffusional control took place. (C) 2002 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Yucatan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000178552100002 L2 - steel reinforced concrete;macrocell behavior;cathodic polarization;EIS;cyclic potentiodynamic polarization;ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; POLARIZATION RESISTANCE; CEMENTITIOUS MATERIALS; HYDROGEN-PEROXIDE; OXYGEN REDUCTION; ELECTRODES; DIFFUSION; CHLORIDE; PERFORMANCE; KINETICS SO - Corrosion Science 2003 ;45(1):7-32 9415 UI - 7727 AU - Sala E AU - burto-Oropeza O AU - Paredes G AU - Thompson G AD - Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093, USAUniv Autonoma Baja California Sur, Dept Biol Marina, La Paz 23080, Baja California, MexicoSonoran Sea Aquarium, Tucson, AZ 85705, USASala, E, Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093 USA TI - Spawning aggregations and reproductive behavior of reef fishes in the Gulf of California AB - Spawning aggregations numbering up to tens of thousands of reef fishes have disappeared throughout the tropics due to fishing, causing the collapse of their populations and of commercial fisheries in many regions. Although there is a wealth of information on spawning aggregations in the Caribbean and the Indopacific, there are almost no data on spawning aggregations of commercial reef fishes in the Tropical Eastern Pacific. Here we describe aggregations and the reproductive behavior of eight species of reef fishes in the Gulf of California, Mexico. The serranids Mycteroperca prionura and M. rosacea, the snapper Lutjanus novemfasciatus, and the jacks Caranx sexfasciatus and Seriola lalandi form spawning aggregations of 12 to > 1000 individuals on islands, exposed coastal rocky reefs, and seamounts. The serranids Paranthias colonus and the snapper L. argentiventris spawn in schools with densities similar to these during non-reproductive periods. We observed aggregations of the serranid M. jordani but (lid not observe spawning. Some spawning aggregations of these and other species (such as Epinephelus itajara and Stereolepis gigas) have now disappeared from the Gulf of California due to fishing. Our findings suggest the existence of undocumented spawning aggregations throughout the Tropical Eastern Pacific that sustain varied levels of fishing pressure. These spawning aggregations must be identified and protected in order to ensure the replenishment of fish populations MH - USA MH - Mexico|Baja California PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 13 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000184653100007 L2 - MARINE RESERVES; PISCES; CONSERVATION; SERRANIDAE; GROUPER SO - Bulletin of Marine Science 2003 ;72(1):103-121 9416 UI - 8101 AU - Sala E AU - burto-Oropeza O AU - Paredes G AU - Parra I AU - Barrera JC AU - Dayton PK AD - Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093, USAUniv Autonoma Baja California Sur, La Paz, Baja Calif Sur, MexicoWorld Wildlife Fund, Gulf California Program, Hermosillo, Sonora, MexicoSala, E, Univ Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biodivers & Conservat, La Jolla, CA 92093 USA TI - Modeling marine protected areas - Response MH - USA MH - Mexico|Baja California Sur MH - Mexico|Sonora PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000183914700019 SO - Science 2003 ;301(5629):48-49 9417 UI - 7013 AU - Salas-Coronado R AU - Galvez-Ruiz JC AU - Jaen-Gaspar JC AU - Noth H AU - Flores-Parra A AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Chem, Mexico City 07000, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyFlores-Parra, A, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Chem, AP 14-740, Mexico City 07000, DF, Mexico TI - 3(1,3-heterazolidin-3-yl-methyl)-1,3-oxazolidines and their reduction with borane-THF AB - Preparation of bis-heterazolidines bonded by a CH2, CH2-S-CH2 or CH2SCH2SCH2 groups through their nitrogen atoms is reported: 3-(1,3-oxazolidin-3-ylmethyl)-1,3-oxazolidine 1, 3-(4,4-dimethyl-1,3-oxazolidin-3-ylmethyl)-1,3-oxazolidine 2, 3-(1,3-diazolidin-3-ylmethyl)-1,3-diazolidine 3, 3-(1,3-thiazolidin-3-ylmethyl)-1,3-thiazolidine 4, 3-(1,3-thiazolidin-3-ylmethylsulfanylmethyl)-1,3-thiazolidine 5 and 3-(1,3-oxazolidin-3-ylmethylsulfanylmethyl-sulfanylmethyl)-1,3-oxazolidi ne 6. The solid state structures of 4 and 5 were determined by X-ray diffraction analyses. BH3-THF reduction reactions of compounds 1-6 were investigated. N --> BH3 mono- and di-adducts of 1-6 were prepared and their structures calculated (ab initio 3-21G*). (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000186515100012 L2 - 3(1,3-heterazolidin-3-yl-methyl)-1,3,-oxazolidines;N -> BH3 adducts;NUCLEAR-MAGNETIC-RESONANCE; X-RAY-DIFFRACTION; ADDUCTS; NMR; PSEUDOEPHEDRINE; HETEROCYCLES; REACTIVITY; BH3; STEREOCHEMISTRY; COORDINATION SO - Journal of Molecular Structure-Theochem 2003 ;640():95-108 9418 UI - 7553 AU - Salas-Pacheco JM AU - Urtiz-Estrada N AU - Martinez-Cadena G AU - Yasbin RE AU - Pedraza-Reyes M AD - Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, Guanajuato 36050, MexicoUniv Texas, Dept Mol & Cell Biol, Richardson, TX 75083, USAPedraza-Reyes, M, Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, Bldg L,Noria Alta S-N,POB 187, Guanajuato 36050, Mexico TI - YqfS from Bacillus subtilis is a spore protein and a new functional member of the type IV apurinic/apyrimidinic-endonuclease family AB - The enzymatic properties and the physiological function of the type IV apurinic/apyrimidinic (AP)-endonuclease homolog of Bacillus subtilis, encoded by yqfS, a gene specifically expressed in spores, were studied here. To this end, a recombinant YqfS protein containing an N-terminal His(6) tag was synthesized in Escherichia coli and purified to homogeneity. An anti-His(6)-YqfS polyclonal antibody exclusively localized YqfS in cell extracts prepared from B. subtilis spores. The His(6)-YqfS protein demonstrated enzymatic properties characteristic of the type IV family of DNA repair enzymes, such as AP-endonucleases and 3'-phosphatases. However, the purified protein lacked both 5'-phosphatase and exonuclease III activities. YqfS showed not only a high level of amino acid identity with E. coli Nfo but also a high resistance to inactivation by EDTA, in the presence of DNA containing AP sites (AP-DNA). These results suggest that YqfS possesses a trinuclear Zn center in which the three metal atoms are intimately coordinated by nine conserved basic residues and two water molecules. Electrophoretic mobility shift assays demonstrated that YqfS possesses structural properties that permit it to bind and scan undamaged DNA as well as to strongly interact with AP-DNA. The ability of yqfS to genetically complement the DNA repair deficiency of an E. coli mutant lacking the major AP-endonucleases Nfo and exonuclease III strongly suggests that its product confers protection to cells against the deleterious effects of oxidative promoters and alkylating agents. Thus, we conclude that YqfS of B. subtilis is a spore-specific protein that has structural and enzymatic properties required to participate in the repair of AP sites and 3' blocking groups of DNA generated during both spore dormancy and germination MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000185181500007 L2 - APURINIC-APYRIMIDINIC ENDONUCLEASE; ESCHERICHIA-COLI; ALTERED DEOXYRIBONUCLEASES; 3'-REPAIR DIESTERASE; ABASIC SITES; DNA-DAMAGE; REPAIR; APN1; PURIFICATION; SPECIFICITY SO - Journal of Bacteriology 2003 ;185(18):5380-5390 9419 UI - 7276 AU - Salas-Solis MC AU - guilera-Granja F AU - Vogel EE AU - Contreras S AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78290, MexicoUniv La Frontera, Dept Fis, Temuco, ChileSalas-Solis, MC, Univ Autonoma San Luis Potosi, Inst Fis, Dr Manuel Nava 6,Apartado Postal 629, San Luis Potosi 78290, Mexico TI - Order parameters in anisotropic two-dimensional +/- J Ising lattices AB - We modify the usual isotropic +/-J Ising spin glass model introducing stronger interactions by a factor of f (anisotropy factor) along one of the axis. We begin by considering the situation in which concentration of ferromagnetic (F) and antiferromagnetic (AF) interactions are the same, where we study the modification that such axial anisotropy has on the density of states of the system, with particular attention on the modification of the ground level. Splits and merges of levels, as well as decreases and increases of degeneracy are observed for particular values of f. Site order parameters q and p, as well as unfrustrated portion of the lattice h increase substantially in the presence of anisotropy. However, these parameters tend to decrease somewhat for rational values of f which happen to be the same for which merges were noticed. Finally, we study the effect of the variation of relative concentration of F vs. AF bonds on these properties. It is found that far from the equal concentration case order parameters increase even further. All of this indicates that simulation of a spin-glass behavior by this simple system is favored under the introduction of anisotropic interactions. (C) 2003 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000185688200017 L2 - Ising;frustration;anisotropy;GROUND-STATE STRUCTURE; SPIN-GLASSES; FRUSTRATION; ALGORITHM; SQUARE SO - Physica A-Statistical Mechanics and Its Applications 2003 ;327(3-4):477-490 9420 UI - 7974 AU - Salas JH AU - Gonzalez MM AU - Noa M AU - Perez NA AU - Diaz G AU - Gutierrez R AU - Zazueta H AU - Osuna I AD - Univ Autonoma Metropolitana X, Dept Prod Agricola & Anim, Mexico City 04960, DF, MexicoUniv Agraria Habana, Fac Vet Med, Dept Prevenc, San Jose Lajas 32700, Habana, CubaUniv Autonoma Sinaloa, Fac Ciencias Mar, Lab Estudios Ambientales, Mazatlan, Sinaloa, MexicoPerez, NA, Univ Autonoma Metropolitana X, Dept Prod Agricola & Anim, Calz Hueso 1100,Col Villa Quietud, Mexico City 04960, DF, Mexico TI - Organophosphorus pesticide residues in Mexican commercial pasteurized milk AB - A study was conducted to measure residues of 13 organophosphorus (OP) pesticides, widely used as dairy cattle ectoparasiticides or in crops used for animal feed, in homogenized and pasteurized Mexican milk samples. Four different milk brands with high distribution were collected biweekly during a 12 month period (n = 96) in supermarkets. OP pesticide residues were measured by gas chromatography with a flame photometric detector. Approximately 39.6% of the samples contained detectable levels of OP pesticide residues. Eight samples contained residues exceeding established maximum residue limits (MIRL), and the OP pesticides present in these samples were dichlorvos (five samples), phorate, chlorpyrifos, and chlorfenvinphos (one sample, respectively). Average residues of 13 OP pesticides measured were below established MRLs ranging between 0.0051 and 0.0203 ppm MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000184100700048 L2 - organophosphorus pesticides;residues;pasteurized milk SO - Journal of Agricultural and Food Chemistry 2003 ;51(15):4468-4471 9421 UI - 7204 AU - Salas M AU - Caro J AU - Molinar F AD - Caro Res Inst, Concord, MA, USAMed Ctr La Raza, Intens Care Unit, Mexico City, DF, Mexico TI - Cost-effectiveness of cefepime versus cefotaxime when added to metronidazole in complicated intraabdominal infections MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Meeting Abstract AV - English IS - 1098-3015 UR - ISI:000183419000206 SO - Value in Health 2003 ;6(3):261-261 9422 UI - 6886 AU - Salas NS AU - Hernandez AC AD - Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, SpainInst Politecn Nacl, Dept Fis, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoSalas, NS, Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, Spain TI - Adiabatic rocking ratchets: Optimum-performance regimes AB - We analyze work and efficiency for an adiabatic rocking ratchet working under three operating regimes: maximum efficiency, maximum work, and a third one which represents a compromise between them. For all of these regimes the application of very concrete loads and external amplitudes is found necessary in order to obtain the maximum possible values of both efficiency and work. The reported results could be valuable to design efficient Brownian motors and compare their operation under different working regimes MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000186571200034 L2 - THERMAL FLUCTUATIONS; MUSCLE-CONTRACTION; EFFICIENCY; OPTIMIZATION; ENERGETICS; EQUILIBRIUM; COMPROMISE; TRANSPORT; SYSTEMS; MOTORS SO - Physical Review e 2003 ;68(4): 9423 UI - 9296 AU - Salas NS AU - Hernandez AC AD - Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoSalas, NS, Univ Salamanca, Dept Fis Aplicada, E-37008 Salamanca, Spain TI - Unified working regime of nonlinear systems rectifying thermal fluctuations AB - We present the results of efficiency and net power output for Feynman's ratchet and pawl engine and its electric counterpart, the diode engine, calculated by means of a recently developed optimization criterion. In both cases a unified working regime between those predicted by maximum efficiency and maximum power calculations was found. These results extend previous findings for macroscopic heat engines and some molecular motors to mesoscopic energy converters MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000180638600001 L2 - ECOLOGICAL OPTIMIZATION CRITERION; TIME HEAT ENGINES; GENERAL PROPERTY; EFFICIENCY; ENERGETICS SO - Europhysics Letters 2003 ;61(3):287-293 9424 UI - 8004 AU - Salas O AU - Kearns K AU - Carrera S AU - Moore JJ AD - CEM, Inst Tecnol & Estudios Super Monterrey, Atizapan 52926, MexicoColorado Sch Mines, ACSEL, Golden, CO 80401, USASalas, O, CEM, Inst Tecnol & Estudios Super Monterrey, Carretera Lago Guadalupe Km 3 5, Atizapan 52926, Mexico TI - Tribological behavior of candidate coatings for Al die casting dies AB - Candidate coatings on H13 steel substrates aimed at improving the tribological performance of die casting dies for the Al foundry industry have been extensively characterized. The study is part of a comprehensive research program whose objective is to design a multilayer coating system that encompasses all the requirements to provide increased surface die performance and die life. The coatings investigated were: CrC, CrN (2), ZrN, MoNx, MoZrN, TiAlN, TiN/TiC, TiB2/TiC, NiAl, MAIN, MoSiC/SiC, Ti-B-C-N, Cr3Si and a control sample that was subjected to a carbonitriding thermochemical treatment. The characterization included: scratch testing, wear testing+optical profilometry, microhardness, optical microscopy and X-ray diffraction. Several wear behavior and adhesion behavior modes were identified based on the morphological characteristics of the wear and scratch marks, and the results of the tests. Wear and adhesion properties seem to be related and mainly controlled by the brittle or tough nature of the coating as well as by the nature of the substrate/coating interface, to a lesser degree by coating hardness, and only marginally by the coating coefficient of friction and roughness. Only a few of the candidate coatings had concomitant good wear and adhesion performance. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0257-8972 UR - ISI:000183937800002 L2 - coatings;die casting;tribology;SCRATCH ADHESION; STEEL; DEPOSITION; SUBSTRATE; HARDNESS SO - Surface & Coatings Technology 2003 ;172(2-3):117-127 9425 UI - 7012 AU - Salazar F AU - Wang C AU - Gelover-Santiago A AU - Zentella-Dehesa A AU - Naumis GG AU - Talamantes J AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCalif State Univ Bakersfield, Dept Phys, Bakersfield, CA 93311, USAWang, C, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Phonon localization in quasiperiodic systems AB - The effects of anharmonic interactions on the localization of phonons in quasiperiodic systems are studied by looking at the transmittance, Lyapunov exponent, participation ratio and energy-level-spacing distribution, within the rotating-wave approximation and first-order perturbation theory. For Fibonacci chains, a power-law distribution is found in the small-spacing region, since the eigenstates are critical. Even within first perturbation stages, anharmonic contributions do clearly manifest, weakening the level clustering behavior, contrary to the periodic case where the distribution is insensitive to weak anharmonic interactions. These results suggest a structural instability of the self-similar vibrational spectrum in quasiperiodic systems. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000186435700034 L2 - LATTICES; SPECTRUM; MODES SO - Journal of Non-Crystalline Solids 2003 ;329(1-3):167-170 9426 UI - 8360 AU - Salazar GA AU - Chase MW AU - Arenas MAS AU - Ingrouille M AD - Royal Bot Gardens, Jodrell Lab, Richmond TW9 3DS, Surrey, EnglandHerbario AMO, Mexico City 11320, DF, MexicoUniv London Birkbeck Coll, Dept Biol, London WC1E 7HX, EnglandSalazar, GA, Univ Nacl Autonoma Mexico, Herbario Nacl Mexico MEXU, Dept Bot, Inst Biol, Apartado Postal 70-367, Mexico City 04510, DF, Mexico TI - Phylogenetics of Cranichideae with emphasis on Spiranthinae (Orchidaceae, Orchidoideae): Evidence from plastid and nuclear DNA sequences AB - DNA sequences from plastid rbcL and matK genes and the trnL-F region, as well as the nuclear ribosomal ITS region, were used to evaluate monophyly and subtribal delimitation of Cranichideae and generic relationships in Spiranthinae. Cranichideae are moderately supported as monophyletic, with Chloraeinae and Pterostylis-Megastylis indicated as their collective sisters. Within Cranichideae, Pachyplectroninae and Goodyerinae form a well-supported monophyletic group sister to a "core spiranthid" clade that includes, according to their branching order, Galeottiellinae, Manniellinae, and a Prescottiinae-Cranichidinae-Spiranthinae subclade. Inclusion of Galeottiella in Spiranthinae, as in previous classifications, renders the latter paraphyletic to all other spiranthid subtribes. Cranichidinae and Spiranthinae (minus Galeottiella) are monophyletic and strongly supported, but Prescottiinae form a grade that includes a strongly supported prescottioid Andean clade and a weakly supported Prescottia-Cranichidinae clade sister to Spiranthinae. Well-supported major clades in Spiranthinae identified in this study do not correspond to previous alliances or the narrowly defined subtribes in which they have been divided recently. Morphological characters, especially those that have been used for taxonomic delimitation in Cranichideae, are discussed against the framework of the molecular trees, emphasizing putative synapomorphies and problems derived from lack of information or inadequate interpretation of the characters MH - United Kingdom MH - Mexico|Distrito Federal PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 18 U4 - Plant Sciences U5 - J;Review AV - English IS - 0002-9122 UR - ISI:000183133400015 L2 - Cranichideae;ITS;matK;molecular phylogeny;Orchidaceae;rbcL;Spiranthinae;trnL-F;SPIRANTHOIDEAE ORCHIDACEAE; MOLECULAR PHYLOGENETICS; NUCLEOTIDE-SEQUENCES; PLANT SYSTEMATICS; CHLOROPLAST DNA; RBCL SEQUENCES; GENE MATK; EVOLUTION; REGIONS; SUBSTITUTION SO - American Journal of Botany 2003 ;90(5):777-795 9427 UI - 7486 AU - Salazar H AU - Martinez O AU - Moreno E AU - Cotzomi J AU - Villasenor L AU - Saavedra O AD - BUAP, Fac Ciencias Fis Matemat, Puebla, MexicoUMSNH, Inst Fis & Matemat, Morelia, Michoacan, MexicoInst Cosmogeofis, Turin, ItalySalazar, H, BUAP, Fac Ciencias Fis Matemat, Puebla, Mexico TI - Results from the Puebla extensive air shower detector array AB - We describe the design and operation of the first stage of the EAS-UAP extensive air shower array, as a detector of very high energy cosmic rays (E-0 > 10(14) eV). The array is located at the Campus of Puebla University and consists of 18 liquid scintillator detectors, with an active surface of 1 m(2) each and a detector spacing of 20 m in a square grid. In this report we discuss the stability and the calibration of the detector array, as derived from the 10 detectors in operation in the first stage. The main characteristics of the array allow us also to use it as an educational and training facility. First distributions of the arrival direction and the lateral shower srpead are also given MH - Italy MH - Mexico|Michoacan MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0920-5632 UR - ISI:000185210300035 SO - Nuclear Physics B-Proceedings Supplements 2003 ;122():251-254 9428 UI - 6702 AU - Salazar LTH AU - Laska M AU - Luna ER AD - Univ Munich, Sch Med, Dept Psychol Med, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuro Etol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Psychol Med, Goethestr 31, D-80336 Munich, Germany TI - Olfactory sensitivity for aliphatic esters in spider monkeys (Ateles geoffroyi) AB - Using a conditioning paradigm, the authors investigated the olfactory sensitivity of 3 spider monkeys (Ateles geoffroyi) for a homologous series of aliphatic esters (ethyl acetate to n-octyl acetate) and isomeric forms of some of these substances. With all odorants, the monkeys significantly discriminated concentrations below 1 ppm from the odorless solvent, and in several cases, individual monkeys even demonstrated thresholds below 1 ppb. The results showed spider monkeys to have a high olfactory sensitivity for aliphatic esters, which for the majority of substances matches or even is better than that of species such as the rat, the mouse, or the dog. These findings support the assumption that between-species comparisons of neuroanatomical features are poor predictors of olfactory performance MH - Germany MH - Mexico|Veracruz PB - WASHINGTON: AMER PSYCHOLOGICAL ASSOC RP - NOT IN FILE U3 - TC 10 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0735-7044 UR - ISI:000187402300003 L2 - SQUIRREL-MONKEYS; SAIMIRI-SCIUREUS; PIGTAIL MACAQUES; MACACA-NEMESTRINA; CARBOXYLIC-ACIDS; NASAL PUNGENCY; WORLD PRIMATE; ODOR MEMORY; DISCRIMINATION; PERFORMANCE SO - Behavioral Neuroscience 2003 ;117(6):1142-1149 9429 UI - 7507 AU - Salazar P AU - Tapia R AU - Rogawski MA AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoNINDS, Epilepsy Res Sect, NIH, Bethesda, MD 20892, USATapia, R, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, AP 70-253, Mexico City 04510, DF, Mexico TI - Effects of neurosteroids on epileptiform activity induced by picrotoxin and 4-aminopyridine in the rat hippocampal slice AB - The neurosteroids allopregnanolone (5alpha-pregnan-3alpha-ol-20-one: 5alpha,3alpha-P) and its 5beta-epimer pregnanolone (5beta,3alpha-P). and pregnenolone sulfate (PS) were examined for effects on spontaneous epileptiform discharges induced by 100 muM picrotoxin (PTX) and 55 muM 4-aminopyridine (4-AP) in the CA3 region of the rat hippocampal slice. At a concentration of 10 muM, 5alpha,3alpha-P partially reduced PTX-induced bursting and at 30 and 90 muM completely suppressed bursting. In contrast, 100 muM 5beta,3alpha-P failed to alter the discharge frequency. 5alpha,3alpha-P depressed 4-AP-induced bursting with similar potency as in the PTX model: 100 muM 5beta,3alpha-P was also partially effective. In the 4-AP model, 5alpha,3alpha-P inhibited both the more frequent predominantly positive-going potentials as well as the less frequent negative-going potentials that may be generated by synchronous GABAergic interneuron firings. PS enhanced the PTX bursting, frequency and. in the 4-AP model. increased the frequency of negative potentials but did not alter the frequency of positive potentials. By itself, PS did not induce bursting. The effects of the steroids in the in vitro seizure models largely correspond with their activities on GABA(A) receptors; suppression of discharges may occur as a result of direct activation of these receptors rather than modulation of GABA-mediated synaptic responses. PTX and 4-AP-induced bursting in the hippocampal slice are useful models for directly assessing neurosteroid effects on seizure susceptibility under conditions that eliminate the factor of brain bioavailability. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0920-1211 UR - ISI:000185325700008 L2 - neurosteroid;picrotoxin;4-aminopyridine;hippocampal slice;epilepsy;D-ASPARTATE RECEPTOR; GABA-A RECEPTOR; PREGNENOLONE SULFATE POTENTIATION; NMDA-INDUCED SEIZURES; SYSTEM IN-VITRO; SYNAPTIC-TRANSMISSION; NEUROACTIVE STEROIDS; DEHYDROEPIANDROSTERONE-SULFATE; ANTICONVULSANT DRUGS; TRANSMITTER RELEASE SO - Epilepsy Research 2003 ;55(1-2):71-82 9430 UI - 6487 AU - Salcedo A AU - Focia RJ AU - Ram AK AU - Bers A AD - MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139, USAMcKinsey & Co Inc, Mexico City 04250, DF, MexicoKulicke & Soffa Ind Inc, Willow Grove, PA 19090, USABers, A, MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA TI - Studies of stimulated Raman backscattering and associated nonlinear laser-plasma interactions AB - Coupled theoretical and computational work is presented aimed at understanding and modelling stimulated Raman backscattering (SRBS) relevant to laser-plasma interactions in large-scale, homogeneous plasmas. With the aid of a new code for simulating and studying the nonlinear coupling in space-time of a large number of modes, and an Eulerian Vlasov-Maxwell code for studying the evolution of large amplitude electron plasma waves, we report results and their interpretations to elucidate the following five observed, nonlinear phenomena associated with SRBS: coupling of SRBS to Langmuir decay instabilities (LDIs); effect of ion-acoustic damping on SRBS; cascading of LDI; stimulated Raman scattering cascades; and stimulated electron acoustic wave scattering (SEAS) MH - USA MH - Mexico|Distrito Federal PB - VIENNA: INT ATOMIC ENERGY AGENCY RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Nuclear U5 - J;Article AV - English IS - 0029-5515 UR - ISI:000187838300021 L2 - HOT-SPOT EXPERIMENTS; SPATIOTEMPORAL CHAOS; NUMERICAL-SIMULATION; VLASOV CODE; SCATTERING; WAVE; SATURATION; LANGMUIR; INSTABILITIES SO - Nuclear Fusion 2003 ;43(12):1759-1770 9431 UI - 7285 AU - Salcido A AU - Celada-Murillo AT AU - Villegas-Martinez R AU - Salas-Oviedo H AU - Sozzi R AU - Georgiadis T AD - Inst Invest Elect, Div Energias Alternas Gerencia Sist Calidad, Cuernavaca 62490, Morelos, MexicoServ Terr Scrl, Milan, ItalyCNR, IBIMET, I-40129 Bologna, ItalySalcido, A, Inst Invest Elect, Div Energias Alternas Gerencia Sist Calidad, Av Reforma 113 Col Palmira, Cuernavaca 62490, Morelos, Mexico TI - A micrometeorological data base for the Mexico City Metropolitan Area AB - In order to overcome the lack of the surface micrometeorological data required for air quality studies in the Mexico City Metropolitan Area (MCMA), a long-term micrometeorological campaign was carried out in this area along the 2001-Year. Three micrometeorological surface stations were installed at sites located at north, north-east, and south sectors of the MCMA. Each station was equipped with a 3D ultrasonic turbulence sensor and with conventional meteorological sensors for temperature, relative humidity, pressure, global radiation, net radiation, and rain. The sampling rates were 10 Hz for the ultrasonic sensor, and 1 Hz for the conventional sensors. One-hour averages were calculated for A the meteorological parameters and for the turbulence parameters such as friction velocity, scale temperature, Monin-Obukhov length, sensible heat flux and turbulent kinetic energy, among others. A simple micrometeorological database was prepared and mounted on a free access Internet page to furnish a specialized tool to the local Authorities to be utilized in health prevention and pollution regulation applications MH - Italy MH - Mexico|Morelos PB - BOLOGNA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Geochemistry & Geophysics U5 - J;Article AV - English IS - 1124-1896 UR - ISI:000185745500006 L2 - ENERGY-BALANCE; URBAN AREAS; TURBULENCE; DISPERSION; ROUGHNESS; PROFILE SO - Nuovo Cimento Della Societa Italiana di Fisica C-Geophysics and Space Physics 2003 ;26(3):317-355 9432 UI - 7307 AU - Salcido A AU - Sozzi R AU - Castro T AD - Inst Invest Elect, Div Energias Alternas, Cuernavaca 62490, Morelos, MexicoSoc Cooperat Serv Terr, Milan, ItalyNatl Autonomous Univ Mexico, Ctr Ciencias Atmos, Mexico City 04510, DF, MexicoSalcido, A, Inst Invest Elect, Div Energias Alternas, Av Reforma No. 113 Col Palmira, Cuernavaca 62490, Morelos, Mexico TI - Least squares variational approach to the convective mixing height estimation problem AB - A least squares variational approach is suggested to estimate the atmospheric mixed layer depth (or mixing height) under convective conditions from the vertical profile of virtual potential temperature. This method was implemented as a software application that could be a very useful tool to estimate the mixing height parameter required in air pollution modeling studies. The software was used to estimate Mexico City mixing heights from the atmospheric sounding data between January to May of 1993 and 1994, and the monthly statistics evolution of the 11:00z and 23:00z mixing height values is presented for this period. The estimations produced by this method for the afternoon mixing height were found in a good agreement with the daily maximum value calculated with the dry adiabatic temperature method. (C) 2003 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1364-8152 UR - ISI:000185873300012 L2 - Convective mixing height;atmospheric soundings;Mexico City statistics SO - Environmental Modelling & Software 2003 ;18(10):951-957 9433 UI - 6936 AU - Salgado G AU - Sanchez-Valenzuela OA AD - Univ Valencia, Fac Matemat, Dept Geometria & Topol, E-46100 Valencia, SpainCIMAT, Guanajuato, Gto, MexicoSalgado, G, Univ Valencia, Fac Matemat, Dept Geometria & Topol, C Dr Moliner 50, E-46100 Valencia, Spain TI - Lie superalgebras based on gl(n) associated to the adjoint representation, and invariant geometric structures defined on them AB - Finite-dimensional real and complex Lie superalgebras whose underlying Lie algebra is gl(n), and whose odd module is gl(n) itself under the adjoint representation are classified up to isomorphism. It is shown that for n greater than or equal to 3 there are one-parameter families of nonisomorphic such Lie superalgebras, plus another set of finitely many different isomorphism classes. For n = 2 there are 10 different isomorphism classes over the real field, and 8 different over the complex numbers. For n = 1 there are 2 different isomorphism classes over either ground field. Representatives on each isomorphism class are given, and their automorphism groups are determined. The question as to which representatives admit Z(2)-graded, ad-invariant geometric structures (of orthogonal or symplectic type) is also addressed, and a precise list of which of such geometric structures can be defined on each isomorphism class is given. In particular, it is shown that Z(2)-homogeneous, orthogonal, ad-invariant geometric structures must be odd. The case of gl(2) over the real field is further analyzed in order to determine for which of the equivalence classes that admit such a structure, that structure can be induced by an underlying Minkowski metric on the 4-dimensional (nongraded) gl(2) MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0010-3616 UR - ISI:000186588600012 L2 - ALGEBRAS SO - Communications in Mathematical Physics 2003 ;241(2-3):505-518 9434 UI - 7449 AU - Salinas-Stefanon EM AU - Orta-Salazar G AU - Millan-PerezPena L AU - Riobo P AD - Univ Autonoma Puebla, Puebla 72501, MexicoUNER, FI, RA-12245 Oro Verde, Parana, Argentina TI - Differential effects of primaquine on the Nav 1.4 and Nav 1.5 sodium channels, expresed in oocytes MH - Argentina MH - Mexico|Puebla PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123801050 SO - Biophysical Journal 2003 ;84(2):215A-215A 9435 UI - 7932 AU - Salmeron J AU - Lazcano-Ponce E AU - Lorincz A AU - Hernandez M AU - Hernandez P AU - Leyva A AU - Uribe M AU - Manzanares H AU - Antunez A AU - Carmona E AU - Ronnett BM AU - Sherman ME AU - Bishai D AU - Ferris D AU - Flores Y AU - Yunes E AU - Shah KV AD - Inst Mexicano Seguro Social, Unidad Invest Epidemiol & Serv Salud, Cuernavaca 62450, Morelos, MexicoInst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62450, Morelos, MexicoDigene Corp, Gaithersburg, MD, USAInst Mexicano Seguro Social, Hosp Reg Cuernavaca, Dept Ginecol, Cuernavaca, Morelos, MexicoInst Mexicano Seguro Social, Hosp Reg Cuernavaca, Dept Patol, Cuernavaca, Morelos, MexicoJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Populat & Family Hlth Sci, Baltimore, MD, USAMed Coll Georgia, Augusta, GA 30912, USAJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mol Microbiol & Immunol, Baltimore, MD, USAJohns Hopkins Med Inst, Dept Pathol, Baltimore, MD 21205, USASalmeron, J, Inst Mexicano Seguro Social, Unidad Invest Epidemiol & Serv Salud, Av Plan Ayala Esq Av Cent S N, Cuernavaca 62450, Morelos, Mexico TI - Comparison of HPV-based assays with Papanicolaou smears for cervical cancer screening in Morelos State, Mexico AB - Objective: To compare the performance of human papillomavirus (HPV) assays with conventional Pap cytology for cervical cancer (CC) screening in Mexico. Methods: Pap smears, self-collected vaginal specimens (SS) for HPV testing, and clinician-collected cervical specimens (CS) for HPV testing were obtained from 7868 women, aged 15-85 years old, attending CC screening at the Mexican Institute of Social Security (IMSS) between May and October, 1999. SS and CS specimens were screened for oncogenic HPV DNA by Hybrid Capture 2. Women who received cytological interpretations of atypical squamous cells of undetermined significance (ASCUS), and/or a positive HPV test were referred for colposcopy and histologic studies. The relative estimates for sensitivity, specificity and predictive values of each test were calculated using histological diagnoses of cervical intraepithelial neoplasia (CIN) grades 2 or 3, or CC histological diagnosis. Results: Oncogenic HPV detection rate was 11.6% for SS, and 9.3% for CS. Pap smear abnormalities were observed in 2.4% of the women. Of 1147 women who had at least one abnormal test result, 88.5% underwent colposcopy, and 101 biopsy-confirmed CIN2/3 or cancer cases were identified. The relative sensitivity estimates for the Pap test, SS and CS were 59.4% (95% CI: 49.2-68.9), 71.3% (95% CI: 61.3-79.6), and 93.1% (95% CI: 85.8-96.9), respectively, while the specificities were 98.3% (95% CI: 98.0-98.6), 89.2% (95% CI: 88.5-89.9), and 91.8% (95% CI: 91.2-92.4), respectively. The positive predictive values of Pap, SS and CS were 36.1, 9.1 and 14.9, the colposcopy referrals needed to detect a case of CIN2/3 or cancer were 2.8, 11.0 and 6.7, respectively. Discussion: Both HPV assays detected more cases of CIN2/3 or CC than Pap cytology alone. However, the HPV assays increased the number of colposcopy referrals. Our study suggests that HPV testing could be an effective way to improve the performance of CC screening MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 32 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0957-5243 UR - ISI:000184280300001 L2 - cervical cancer;HPV assays;Mexico;pap smears;PAP TEST; WOMEN; SAMPLES; DETECT; LESIONS SO - Cancer Causes & Control 2003 ;14(6):505-512 9436 UI - 9487 AU - Samuel FH AU - Samuel AM AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, Gen Motors Powertrain, Milford, NH 03055, USACorp Nemak SA CV, Garza Garcia 66221, NL, MexicoSamuel, FH, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Influence of composition, Sr modification, and annealing treatment on the structure and properties of cast Al-4 pct Mg alloys AB - The presence of various amounts of strontium and iron in aluminum alloys of the type used in automotive sheet applications and can-end stock contributes to the formation of coarse constituents, including Mg2Si and Fe intermetallics. As these intermetallics influence the alloy sheet formability, it is always a goal to reduce their number employing different means. The role of strontium addition and heat treatment in controlling the size and distribution of the intermetallics present in three Al-4 pct Mg 5XXX type alloys (one industrial and two experimental alloys) was studied, in relation to their properties. Particular attention was paid to the oxidation of magnesium during the process of annealing or homogenization at temperatures as high as 520 degreesC. The phases obtained were analyzed using thermal analysis, optical microscopy, and electron probe microanalysis (EPMA) coupled with energy dispersive X-ray (EDX) analysis. The effect of the phases present on the alloy performance was estimated in terms of the tensile properties. The results show that increasing the Si and Fe contents increases the number of coarse intermetallics, which deteriorate the alloy properties, particularly ductility. The main phases observed are Al-6(Fe,Mn), Al-8(Fe,Mn)(2)Si, Al-15(Fe,Mn)(3)Si-2, and Mg2Si in script form, and traces of a complex ternary eutectic containing Al8Mg5. Addition of Sr (250 to 300 ppm) to low Si-low Fe alloys lowers the properties after annealing at 345 degreesC, due to precipitation of Sr-based intermetallics, but improves the properties in high Si-high Fe alloys annealed at 520 degreesC, through fragmentation of the existing intermetallics, in particular, Mg2Si. Property improvements of 23 pct yield strength (YS), 45 pct ultimate tensile strength (UTS), and 120 pct elongation (El) are observed after 8 hours/520 degreesC. Spinel formation occurs during annealing at 520 degreesC and accelerates with annealing time, leading to lower alloy properties. Addition of 100 to 250 ppm Be is found to be effective in preventing spinel formation, whereas addition of up to 1200 ppm Sr is seen to neither prevent nor minimize the reaction. The main fracture mechanism in these alloys is governed by the formation of large dimples, at the interiors of which fragments of intermetallics are observed. Slip lines on the surface of the dimples are most likely a result of the Portevin-Chatelier effect MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000180120700011 SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2003 ;34(1):115-129 9437 UI - 8277 AU - San Miguel-Chavez R AU - Soto-Hernandez M AU - Ramos-Valdivia AC AU - Kite G AU - Martinez-Vazquez M AU - Garcia MD AU - Terrazas T AD - Colegio Postgrad, Programa Bot, IRENAT, Montecillo 56230, MexicoIPN, Dept Biotecnol, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, MexicoRoyal Bot Gardens, Richmond TW9 3AB, Surrey, EnglandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Chapingo, Chapingo 56230, MexicoSoto-Hernandez, M, Colegio Postgrad, Programa Bot, IRENAT, Montecillo 56230, Mexico TI - Production of alkaloids by in vitro culture of Erythrina americana Miller AB - The production of erythroidines and other alkaloids was studied in cotyledons, callus and cell suspension cultures of Erythrina americana Miller. The cell suspension cultures, grown in Murashige & Skoog medium with naphthaleneacetic acid (3 mg l(-1)) and kinetin (2 mg l(-1)), produced 89 and 17 mug alpha- and beta-erythroidines respectively per g dry wt MH - United Kingdom MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000183441800009 L2 - alkaloids;Erythrina americana;erythroidines;plant growth regulators;plant tissue culture;ACCUMULATION SO - Biotechnology Letters 2003 ;25(13):1055-1059 9438 UI - 8223 AU - Sanchez-Blazquez P AU - Gorgas J AU - Cardiel N AU - Cenarro J AU - Gonzalez JJ AD - Univ Complutense Madrid, Fac Fis, Dept Astrofis, Madrid 28040, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCalar Alto Observ, Ctr Astron Hispano Aleman, Almeria 04044, SpainSanchez-Blazquez, P, Univ Complutense Madrid, Fac Fis, Dept Astrofis, Ciudad Univ, Madrid 28040, Spain TI - Differences in carbon and nitrogen abundances between field and cluster early-type galaxies AB - Central line-strength indices were measured in the blue spectral region for a sample of 98 early-type galaxies in different environments. For most indices (Mg b and [Fe] in particular), elliptical galaxies in rich clusters and in low-density regions follow the same index-sigma relations. However, striking spectral differences between field elliptical galaxies and their counterparts in the central region of the Coma Cluster are found for the first time, with galaxies in the denser environment showing significantly lower C4668 and CN2 absorption strengths. The most convincing interpretation of these results is that they represent a difference in abundance ratios arising from distinct star formation and chemical-enrichment histories of galaxies in different environments. A scenario in which elliptical galaxies in clusters are fully assembled at earlier stages than their low-density counterparts is discussed MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183459600007 L2 - galaxies : abundances;galaxies : clusters : general;galaxies : evolution;galaxies : formation;galaxies : stellar content;OLD STELLAR POPULATIONS; ELLIPTIC GALAXIES; COMA CLUSTER; ENVIRONMENTS; INDEXES; NUCLEI; MODEL; STARS SO - Astrophysical Journal 2003 ;590(2):L91-L94 9439 UI - 8961 AU - Sanchez-Castillo CP AU - Velazquez-Monroy O AU - Berber A AU - Lara-Esqueda A AU - Tapia-Conyer R AU - James WPT AD - Natl Inst Med Sci & Nutr Salvador Zubiran, Direcc Nutric, Dept Fisiol, Tlalpan 14000, DF, MexicoNatl Ctr Epidemiol Vigilance, Minist Hlth, Direct Adult & Elderly Hlth Program, Mexico City, DF, MexicoNatl Hlth Survey 2000, Mexico City, DF, MexicoMinist Hlth, Undersecretary Prevent & Protect Hlth, Mexico City, DF, MexicoInt Obes Task Force, London, EnglandSanchez-Castillo, CP, Natl Inst Med Sci & Nutr Salvador Zubiran, Direcc Nutric, Dept Fisiol, Vasco Quiroga 15, Tlalpan 14000, DF, Mexico TI - Anthropometric cutoff points for predicting chronic diseases in the Mexican National Health Survey 2000 AB - Objective: To determine optimum anthropometric cutoffs for predicting the likelihood ratios of type 2 diabetes mellitus (DM) and hypertension (HT) in Mexicans. Research Methods and Procedures: Data from a randomly selected, nationally representative health survey (2000) with 11,730 men [37.4 ( +/- 12.9) years] and 26,647 women [37.3( +/- 12.9) years] were assessed for values of body mass index (BMI) and waist circumference (WC) for predicting DM or HT by receiver operating characteristic curve analyses. Likelihood ratios for DM and HT were calculated, and BMIs or WCs for public-health screening were developed. Subanalyses included regional data. Results: Likelihood ratios of DM and HT increased from BMI values of 22 to 24 kg/m(2) in both sexes and with WC values of 75 to 80 cm in men and 70 to 80 cm in women. The best BMI cutoffs for predicting DM were 26.3 to 27.4 kg/m(2) in men and 27.7 to 28.9 kg/m(2) in women, with similar values for HT, i.e., 26.2 to 27.0 kg/m(2) and 27.7 to 28.5 kg/m(2), for men and women, respectively; WC cutoffs for DM were 93 to 98 cm in men and 94 to 99 cm in women, and cutoffs for HT were 92 to 96 cm and 93 to 96 cm for men and women, respectively. The WC cutoffs had higher sensitivity and specificity than those of BMI. Discussion: The risk for DM and HT starts at lower levels of BMI and WC than those suggested by WHO. WC is a better discriminator than BMI measures for use in public health MH - United Kingdom MH - Mexico|Distrito Federal PB - SILVER SPRING: NORTH AMER ASSOC STUDY OBESITY RP - NOT IN FILE U3 - TC 26 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 1071-7323 UR - ISI:000181485400014 L2 - body mass index;waist circumference;receiver operating characteristic curve (ROC) analysis;likelihood ratio;CARDIOVASCULAR RISK-FACTORS; WAIST CIRCUMFERENCE; HYPERTENSION; DYSLIPIDEMIA; PREVALENCE; OVERWEIGHT; INDEXES; SAMPLE; ADULTS; WEIGHT SO - Obesity Research 2003 ;11(3):442-451 9440 UI - 7453 AU - Sanchez-Chapula JA AU - Ferrer T AU - Navarro-Polanco RA AU - Sanguinetti MC AD - Univ Colima, Colima 28045, MexicoUniv Utah, Salt Lake City, UT 84112, USA TI - A single amino acid in the S6 domain determines the voltage dependence of HERG channel block by drugs MH - Mexico|Colima MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123802680 SO - Biophysical Journal 2003 ;84(2):545A-545A 9441 UI - 8712 AU - Sanchez-Chapula JA AU - Ferrer T AU - Navarro-Polanco RA AU - Sanguinetti MC AD - Univ Utah, Dept Physiol, Eccles Program Human Mol Biol & Genet, Salt Lake City, UT 84112, USAUniv Colima, Ctr Univ Invest Biomed, Unidad Invest Carlos Mendez, Colima, MexicoSanguinetti, MC, Univ Utah, Dept Physiol, Eccles Program Human Mol Biol & Genet, 15 N 2030 E,Room 4220, Salt Lake City, UT 84112 USA TI - Voltage-dependent profile of human ether-a-go-go-related gene channel block is influenced by a single residue in the S6 transmembrane domain AB - Many common medications block delayed rectifier K+ channels and prolong the duration of cardiac action potentials. Here we investigate the molecular mechanisms of voltage-dependent block of human ether-a-go-go-related gene (HERG) delayed rectifier K+ channels expressed in Xenopus laevis oocytes by quinidine, an antiarrhythmic drug, and vesnarinone, a cardiotonic drug. The IC50 values determined with voltage-clamp pulses to 0 mV were 4.6 muM and 57 muM for quinidine and quinine, respectively. Block of HERG by quinidine (and its isomer quinine) was enhanced by progressive membrane depolarization and accompanied by a negative shift in the voltage dependence of channel activation. As reported previously for other HERG blockers (e.g., MK-499, cisapride, terfenadine, chloroquine), the potency of quinidine was reduced >100-fold by the mutation of key aromatic residues (Y652, F656) located in the S6 domain. Mutations of Y652 eliminated (Y652F) or reversed (Y652A) the voltage dependence of HERG channel block by quinidine and quinine. These quinolines contain a charged N atom that might bond with Y652 by a cation-pi interaction. However, similar changes in the voltage-dependent profile for block of Y652F or Y652A HERG channels were observed with vesnarinone, a cardiotonic drug that is uncharged at physiological pH. Together, these results suggest that voltage-dependent block of HERG results from gating-dependent changes in the orientation of Y652, a critical component of the drug binding site, and not from a transmembrane field effect on a charged drug molecule MH - Mexico|Colima MH - USA PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 40 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0026-895X UR - ISI:000182238900011 L2 - POTASSIUM CHANNEL; VENTRICULAR MYOCYTES; XENOPUS OOCYTES; K+ CURRENT; PURKINJE-FIBERS; QUINIDINE; HERG; RECTIFIER; BINDING; VESNARINONE SO - Molecular Pharmacology 2003 ;63(5):1051-1058 9442 UI - 9278 AU - Sanchez-Escalante A AU - Torrescano G AU - Djenane D AU - Beltran JA AU - Roncales P AD - Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, E-50013 Zaragoza, SpainCtr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoRoncales, P, Univ Zaragoza, Fac Vet Sci, Lab Food Technol, Dept Anim Prod & Food Sci, C-Miguel Servet 177, E-50013 Zaragoza, Spain TI - Stabilisation of colour and odour of beef patties by using lycopene-rich tomato and peppers as a source of antioxidants AB - Beef patties containing natural antioxidants-cayenne hot pepper, red sweet pepper, lycopene-rich tomato pulp (LRTP) and extract of tomato rich in lycopene (Lyc-O-Mat(TM))-and packaged in modified atmosphere were evaluated for storage stability at 2 VC by measuring CIE a* values, surface metmyoglobin, TBARS, psychrotrophic bacteria counts and, sensory off-odour and discolouration. Results demonstrated that the addition of ground peppers (both sweet and hot) to beef patties delayed and inhibited very significantly (p < 0.05) the oxidation of both myoglobin and lipid as well as the growth of psychrotrophic bacteria. As a consequence, and according to instrumental and sensory results of meat colour and odour, the shelf life of beef patties was extended from about 4 to about 16 days. Capsaicinoid-rich cayenne hot pepper exerted a more intense antioxidative effect than capsaicinoid-free red sweet pepper. The addition of lycopene-enriched tomato products (LOM and LRTP) was not as effective as treatment with peppers, although they exerted a significant (P < 0.05) antioxidative effect too, depending on the lycopene concentration. These tomato products delayed meat deterioration to a varying extent, so that the shelf life of treated beef patties ranged between 8 and 12 days. (C) 2003 Society of Chemical Industry MH - Mexico|Sonora MH - Spain PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000180754300007 L2 - meat;beef patties;colour;lipid oxidation;natural antioxidants;pepper;cayenne;lycopene;tomato;LIQUID-CHROMATOGRAPHY; MODIFIED ATMOSPHERE; ALPHA-TOCOPHEROL; CAPSICUM-ANNUUM; ASCORBIC-ACID; PAPRIKA; CAPSAICINOIDS; CHEMISTRY; STABILITY; ROSEMARY SO - Journal of the Science of Food and Agriculture 2003 ;83(3):187-194 9443 UI - 5973 AU - Sanchez-Garcia JA AU - Wharton RA AU - Romero-Napoles J AU - Gonzalez-Hernandez A AU - Lopez-Martinez V AU - Equihua-Martinez A AU - Gonzalez-Hernandez H AU - Carrillo-Sanchez JL AD - IPN, CIIDIR, Unidad Oaxaca, Area Control Biol, Xoxocotlan 71230, Oaxaca, MexicoTexas A&M Univ, Dept Entomol, College Stn, TX 77843, USAColegio Postgrad, Inst Fitosanidad, Programa Entomol & Acarol, Mexico City 56230, DF, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Mexico City 66450, DF, MexicoUniv Autonoma Estado Morelos, Fac Ciencis Agropecuarias, Cuernavaca 62210, Morelos, MexicoSanchez-Garcia, JA, IPN, CIIDIR, Unidad Oaxaca, Area Control Biol, Hornos 1003, Xoxocotlan 71230, Oaxaca, Mexico TI - Description of a new species of Blacus Nees (Hymenoptera : Braconidae) from Mexico, utilizing characters of the male external genitalia AB - A new species of Blacus from Mexico is described. A technique for studying the male genitalia in braconids was implemented. The male genitalia of Blacus parastigmaticus, new species is described and a terminology for morphological characters is proposed MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Oaxaca MH - USA PB - SAN FRANCISCO: PACIFIC COAST ENTOMOL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0031-0603 UR - ISI:000220157300007 L2 - Insecta;taxonomy;Hymenoptera;Braconidae;Blacus;Mexico SO - Pan-Pacific Entomologist 2003 ;79(2):135-144 9444 UI - 7079 AU - Sanchez-Gonzalez S AU - Ruiz-Garcia J AU - Galvez-Ruiz MJ AD - Univ Granada, Fac Sci, Biocolloid & Fluid Phys Grp, E-18071 Granada, SpainUniv Extremadura, Sch Ind Engn, Dept Elect & Electromech Engn, E-06071 Badajoz, SpainUA San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoGalvez-Ruiz, MJ, Univ Granada, Fac Sci, Biocolloid & Fluid Phys Grp, E-18071 Granada, Spain TI - Langmuir-Blodgett films of biopolymers: a method to obtain protein multilayers AB - In this work, we present a methodology for choosing the best experimental conditions for transferring protein Langmuir films onto solid substrates. As an example of applying the proposed methodology, we used monolayers of the protein bovine serum albumin, which is a very stable protein and is of great interest in the development of immunosensors. Langmuir-Blodgett (LB) films of this protein, on different solid substrates, were obtained and characterized as a function of pH, surface pressure, temperature, and contact angle. The compressibility modulus, the spreading entropy, and the fraction of desorbed protein sections were used as control parameters to find these conditions. A careful analysis of these parameters shows that there is a window on the values of these experimental parameters in which the LB films are best formed. Our methodology can be applied to other biomacromolecules to find the best conditions to form LB films from isotherm measurements. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000186290700004 L2 - Langmuir-Blodgett films;interfacial stability;BSA monolayers;MIXED MONOLAYERS; SERUM-ALBUMIN; DESORPTION; INTERFACE SO - Journal of Colloid and Interface Science 2003 ;267(2):286-293 9445 UI - 7138 AU - Sanchez-Lopez A AU - Centurion D AU - Vazquez E AU - Arulmani U AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsSaxena, PR, IPN, CINVESTAV, Dept Farmacobiol, Czda Tenorios 235,Col Granjas Coapa,Deleg Tlalpan, Mexico City 14330, DF, Mexico TI - Pharmacological profile of the 5-HT-induced inhibition of cardioaccelerator sympathetic outflow in pithed rats: correlation with 5-HT1 and putative 5-ht(5A/5B) receptors AB - 1 Continuous infusions of 5-hydroxytryptamine (5-HT) inhibit the tachycardiac responses to preganglionic (C-7-T-1) sympathetic stimulation in pithed rats pretreated with desipramine. The present study identified the pharmacological profile of this inhibitory action of 5-HT. 2 The inhibition induced by intravenous (i.v.) continuous infusions of 5-HT (5.6 mug kg(-1) min(-1)) on sympathetically induced tachycardiac responses remained unaltered after i.v. treatment with saline or the antagonists GR 127935 (5-HT1B/1D), the combination of WAY 100635 (5-HT1A) plus GR 127935, ritanserin (5-HT2), tropisetron (5-HT3/4), LY215840 (5-HT7) or a cocktail of antagonists/inhibitors consisting of yohimbine (alpha(2)), prazosin (alpha(1)), ritanserin, GR 127935, WAY 100635 and indomethacin (cyclooxygenase), but was abolished by methiothepin (5-HT1/2/6/7 and recombinant 5-ht(5A/5B)). These drugs, used in doses high enough to block their respective receptors/mechanisms, did not modify the sympathetically induced tachycardiac responses per se. 3 I.v. continuous infusions of the agonists 5-carboxamidotryptamine (5-CT; 5-HT1/7 and recombinant 5-ht(5A/5B)), CP 93,129 (r5-HT1B), sumatriptan (5-HT1B/1D), PNU-142633 (5-HT1D) and ergotamine (5-HT1B/1D and recombinant 5-ht(5A/5B)) mimicked the above sympatho-inhibition to 5-HT. In contrast, the agonists indorenate (5-HT1A) and LY344864 (5-ht(1F)) were inactive. Interestingly, 5-CT-induced cardiac sympatho-inhibition was abolished by methiothepin, the cocktail of antagonists/inhibitors, GR 127935 or the combination of SB224289 (5-HT1B) plus BRL15572 (5-HT1D), but remained unchanged when SB224289 or BRL15572 were given separately. 4 Therefore, 5-HT-induced cardiac sympatho-inhibition, being unrelated to 5-HT2, 5-HT3, 5-HT4, 5-ht(6), 5-HT7 receptors, alpha(1/2)-adrenoceptor or prostaglandin synthesis, seems to be primarily mediated by (i) 5-HT1 (probably 5-HT1B/1D) receptors and (ii) a novel mechanism antagonized by methiothepin that, most likely, involves putative 5-ht(5A/5B) receptors MH - Mexico|Distrito Federal MH - Netherlands PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000186240600017 L2 - CP 93,129;GR 127935;5-HT1B/1D receptors;5-ht(5A/5B) receptors;LY215840;LY344864;PNU-142633;sympatho-inhibition;tachycardia;WAY 100635;SEROTONIN RECEPTOR; MEDIATING TACHYCARDIA; NORADRENALINE RELEASE; ADENYLATE-CYCLASE; BINDING-SITES; GUINEA-PIG; 5-HYDROXYTRYPTAMINE; AGONIST; ANTAGONIST; SUBTYPES SO - British Journal of Pharmacology 2003 ;140(4):725-735 9446 UI - 6268 AU - Sanchez-Lozada LG AU - Tapia E AU - Santamaria J AU - Soto V AU - vila-Casado C AU - Rodriguez-Iturbe B AU - Johnson RJ AU - Herrera-Acosta J AD - Inst Cadiol I Chavez, Mexico City, DF, MexicoINBIOMED, Maracaibo, Zulia, VenezuelaBaylor Coll Med, Houston, TX 77030, USA TI - Mild hyperuricemia (HU) increases arteriolopathy inducing renal cortical ischemia in 5/6 nephrectomy (Nx) rats MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219102864 SO - Journal of the American Society of Nephrology 2003 ;14():618A-619A 9447 UI - 7416 AU - Sanchez-Lozada LG AU - Tapia E AU - Johnson RJ AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AD - INC Ignacio Chavez, Dept Nephrol, Mexico City 14080, DF, MexicoBaylor Coll Med, Div Renal, Houston, TX 77030, USAUniv Zulia, Serv Nefrol, Univ Hosp, Inst Inmunobiol,FUNDACITE Zulia, Maracaibo 4011, VenezuelaHerrera-Acosta, J, INC Ignacio Chavez, Dept Nephrol, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Glomerular hemodynamic changes associated with arteriolar lesions and tubulointerstitial inflammation AB - Glomerular hemodynamic adaptations to loss of renal mass are thought to be the initiating factor of progression to renal failure; however, tubulointerstitial (TI) injury correlates better with progression than with glomerular damage. Thus, it is conceivable that tubulointerstitial alterations participate in the pathophysiology of renal disease progression by modifying the adaptive responses of glomerular hemodynamics. In experimental models of progressive renal disease, suppressing tubulointerstitial inflammatory cell infiltration with anti-inflammatory drugs reduces renal damage despite persistence of systemic hypertension. In recent studies in rats with subtotal renal ablation, we found that treatment with polysulphate pentosan (PPS) and with mycophenolate mofetil (MMF) prevented proteinuria, glomerular hypertension, and hyperfiltration, despite persisting arterial hypertension due to higher afferent resistance. In addition, arteriolopathy was significantly attenuated by MMF, suggesting preservation of vascular structure and function. Association of vascular injury of afferent arterioles, glomerular hemodynamic changes, and renal lesions has been described in other conditions such as hyperuricemia, protein overload, fawn-hooded rats, and aging spontaneously hypertensive rats (SHR). Arteriolopathy results in a maladaptive function that permits the transmission of systemic hypertension to glomerular capillaries. Glomerular hypertension results in mechanical damage to the capillary wall and increased filtration of proteins to tubular lumen. Enhanced tubular reabsorption induces synthesis of proinflammatory and profibrotic factors, resulting in tubulointerstitial inflammation and fibrosis. In conditions in which there is overactivity of the renin-angiotensin system (RAS), such as mild hyperuricemia and protein overload, arteriolopathy is associated with increased glomerular pressure and reduced glomerular plasma flow that results in post-glomerular ischemia and tubulointerstitial injury MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 9 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000185515400003 L2 - glomerular hypertension;arteriolopathy;inflammation;tubulointerstitial injury;MYCOPHENOLATE-MOFETIL PREVENTS; ANGIOTENSIN-CONVERTING ENZYME; TUBULAR EPITHELIAL-CELLS; CHRONIC-RENAL-FAILURE; II RECEPTOR BLOCKADE; FAWN-HOODED RAT; NF-KAPPA-B; REMNANT KIDNEY; URIC-ACID; INTERSTITIAL INFLAMMATION SO - Kidney International 2003 ;64():S9-S14 9448 UI - 9220 AU - Sanchez-Teyer LF AU - Quiroz-Figueroa F AU - Loyola-Vargas V AU - Infante D AD - Inst Estudios Avanzados, Ctr Biotechnol, Caracas 1051A, VenezuelaCtr Invest Cientif Yucatan, Yucatan, Merida, Mexico TI - Culture-induced variation in plants of Coffea arabica cv. Caturra rojo, regenerated by direct and indirect somatic embryogenesis AB - Amplified fragment-length polymorphism (AFLP) was used to evaluate the stability of DNA in regenerated plantlets of Coffea arabica obtained by direct (DSE) and indirect somatic embryogenesis (ISE). Cluster analysis using the unweighted pair-group method (UPGMA), showed no specific grouping pattern related to the type of embryogenesis. These results suggest that the somatic embryogenesis (SE) process has a mechanism for the selection of normal and competent cells. Bulked DNA from regenerated plants obtained by DSE and ISE, and from the mother plants, was used to characterize specific AFLP fragments associated with each SE process. Twenty-three primer combinations were tested. A total of 1446 bands were analyzed, with 11.4% being polymorphic and 84% being specific for regenerated plants. Furthermore, specific bands were detected for DSE, ISE, and the mother plants. These results indicate that the SE process induces rearrangements at the DNA level and demonstrates discrepancies between the mechanisms involved in each SE process. Coffea arabica breeding programs that involve DSE and ISE can use AFLP as an additional tool for assessing DNA stability MH - Mexico|Yucatan MH - Venezuela PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1073-6085 UR - ISI:000180849300002 L2 - AFLP;Coffea arabica;molecular markers;genetic variation;cluster analysis;bulk analysis;SOMACLONAL VARIATION; TISSUE-CULTURE; DNA METHYLATION; CELL-CULTURES; LEAF EXPLANTS; RAPD ANALYSIS; EMBRYOS; L.; IMPROVEMENT; INDUCTION SO - Molecular Biotechnology 2003 ;23(2):107-115 9449 UI - 9027 AU - Sanchez-Yanez RE AU - Kurmyshev EV AU - Fernandez A AD - AC, Ctr Invest Opt, Guanajuato 37150, MexicoUniv Vigo, ETS Ingn Ind, Dept Engn Design, Vigo 36200, SpainSanchez-Yanez, RE, AC, Ctr Invest Opt, Loma Bosque 115 Lomas Campestre,Apartado Postal 1, Guanajuato 37150, Mexico TI - One-class texture classifier in the CCR feature space AB - A one-class classifier in the coordinated clusters representation (CCR) feature space is proposed in order to form classes with a required homogeneity with respect to given features of texture images. Experiments with gray level texture images of Brodatz catalog and "Rosa Porri (n) over tildeo" polished granites demonstrate high discrimination performance of the criterion. The compactness of a class of images in the CCR feature space is determined by the class variance and, in addition, controlled by an empirical adjustment parameter. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0167-8655 UR - ISI:000181368900035 L2 - texture;one-class classifier;coordinated clusters representation;visual inspection;COLOR SO - Pattern Recognition Letters 2003 ;24(9-10):1503-1511 9450 UI - 8045 AU - Sanchez A AU - Parra LF AU - Baird R AU - Macchietto S AD - CINVESTAV, Dept Elect Engn & Comp, Guadalajara 45091, Jalisco, MexicoUniv London Imperial Coll Sci Technol & Med, Ctr Proc Syst Engn, London SW7 2BY, EnglandSanchez, A, CINVESTAV, Dept Elect Engn & Comp, Apdo Postal 31-348, Guadalajara 45091, Jalisco, Mexico TI - Hybrid modeling and dynamic simulation of automated batch plants AB - A proposal is presented for the hybrid modeling and dynamic simulation of automated batch processing plants with dominant discrete-event behavior., The proposal encompasses current techniques for modeling continuous-time/discrete-event processes, synthesizing, discrete-event controllers, as well as the use of industrial standards for batch control. The result is a hierarchical-modular model of a plant. in which process and control tasks are clearly differentiated. Implementation rules are established for a specific dynamic simulator capable of handling hybrid systems. The approach is demonstrated by building and verifying a I complete model for an automated milk pasteurization plant. Results show that handling problems of realistic complexity is feasible using state-of-the-art technology. (C) 2003 ISA-The Instrumentation, Systems, and Automation Society MH - United Kingdom MH - Mexico|Jalisco PB - RES TRIANGLE PK: I S A-THE INSTRUMENTATION SYSTEMS AUTOMATION SOC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Instruments & Instrumentation U5 - J;Article AV - English IS - 0019-0578 UR - ISI:000183931000006 L2 - hybrid modeling and simulation;process operations;discrete-event systems;automated batch processing;SUPERVISORY CONTROL; CONTROL-SYSTEMS SO - Isa Transactions 2003 ;42(3):401-420 9451 UI - 8031 AU - Sanchez FH AU - Duenas JMM AU - Ribelles JLG AD - Univ Politecn Valencia, Ctr Biomat, E-46071 Valencia, SpainCtr Invest Cient Yucatan, Merida 97200, MexicoDuenas, JMM, Univ Politecn Valencia, Ctr Biomat, Camino Vera S-N, E-46071 Valencia, Spain TI - Influence of the molecular mass on the segmental relaxation times of polystyrene determined by DSC AB - The segmental dynamics of narrow fractions (M-w]/[M-n] approximate to 1.05) of polystyrene with molecular masses ranging from 4000 to 600000 has been characterised by DSC. The samples were subjected to different thermal histories previously to the recorded heating scans including cooling from equilibrium at different cooling rates and annealing at different temperatures for different times. The fragility parameter m=[partial derivativelog tau/partial derivative(T-g/T)](Tg) was determined from the dependence of the glass transition temperature on the cooling rate from an equilibrium state. The curve that represents the enthalpy loss during the isothermal annealing vs. the annealing temperature for a fixed annealing time (180 min) shows a peak which can be used to describe the temperature interval in which the conformational rearrangements takes place at a rate compatible with the annealing time. This peak shifts towards higher temperatures when the molecular mass increases due to the shift of the glass transition temperature but the plot vs. T-g/T is independent on the molecular mass. The beta parameter of the stretched exponential and the temperature dependence of the relaxation time were calculated through modelling that confirms that the fragility of the polymer is independent of molecular mass MH - Mexico|Yucatan MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 1388-6150 UR - ISI:000183863300026 L2 - fragility;glass transition;molecular mass;polystyrene;structural relaxation;STRUCTURAL RELAXATION; CONFIGURATIONAL ENTROPY; TEMPERATURE-DEPENDENCE; ENTHALPY RELAXATION; GLASS-TRANSITION; EQUATION; POLYCARBONATE; BEHAVIOR SO - Journal of Thermal Analysis and Calorimetry 2003 ;72(2):631-640 9452 UI - 9426 AU - Sanchez JS AU - Barandela R AU - Marques AI AU - Alejo R AU - Badenas J AD - Univ Jaume I, Castellon de La Plana, SpainInst Tecnol Toluca, Metepec 52140, MexicoSanchez, JS, Univ Jaume I, Av Vicent Sos Baynat S-N, Castellon de La Plana, Spain TI - Analysis of new techniques to obtain quality training sets AB - This paper presents new algorithms to identify and eliminate mislabelled, noisy and atypical training samples for supervised learning and more specifically, for nearest neighbour classification. The main goal of these approaches is to enhance the classification accuracy by improving the quality of the training data. Several experiments with synthetic and real data sets are carried out in order to illustrate the behaviour of the schemes proposed here and compare their performance with that of other traditional techniques. It is also analysed the ability of these new algorithms to "reduce" the possible overlapping among regions of different classes. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0167-8655 UR - ISI:000180351500010 L2 - nearest neighbour;editing;classification accuracy;nearest centroid neighbourhood;outlier;quality training set;NEIGHBORHOOD; RULE SO - Pattern Recognition Letters 2003 ;24(7):1015-1022 9453 UI - 7548 AU - Sanchez SAP AU - Ponce-Castaneda S AU - Martinez JR AU - Ruiz F AU - Chumakov Y AU - Dominguez O AD - Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, SLP, MexicoMASPEC, Ist Mat Speciali Elettron & Magnetismo, I-43010 Parma, ItalyMIT, George R Harrison Spect Lab, Cambridge, MA 02139, USAMoldavian Acad Sci, Inst Appl Phys, Kishinev 2028, MoldovaUniv Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78000, SLP, MexicoMartinez, JR, Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, SLP, Mexico TI - Quantitative analysis of iron oxide particles embedded in an amorphous xerogel matrix AB - Using DTA, X-ray diffraction, vibrating sample magnetometry, and Rietveld refinement. we analyze the structural evolution under thermal treatment, and its relation to magnetic properties, of the compound formed by iron oxide particles embedded in a silica xerogel matrix. A variation of the Rietveld refinement method is used to calculate the amorphous and crystalline content in these composites by considering ail initial crystalline model assumed to be the same composition as the material to be modelled. We refined the structure of compounds using the Maud program and we found that this program can be used to determine the amorphous and crystalline fractions of composites. Structural changes are correlated with magnetic properties. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|San Luis Potosi MH - Moldova MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000185160300028 L2 - MAGNETIC-PROPERTIES; SILICA MATRIX; NANOPARTICLES; DIFFRACTION; CLUSTERS; TEXTURE; GLASS SO - Journal of Non-Crystalline Solids 2003 ;325(1-3):251-257 9454 UI - 6844 AU - Sanders EJ AU - Walter MA AU - Parker E AU - Aramburo C AU - Harvey S AD - Univ Alberta, Dept Physiol, Edmonton, AB T6G 1Y6, CanadaUniv Alberta, Dept Ophthalmol, Edmonton, AB, CanadaUniv Nacl Autonoma Mexico, Inst Neurobiol, Dept Cellular & Mol Neurobiol, Queretaro, MexicoSanders, EJ, Univ Alberta, Dept Physiol, Edmonton, AB T6G 1Y6, Canada TI - Opticin binds retinal growth hormone in the embryonic vitreous AB - PURPOSE. Opticin is a small leucine-rich repeat proteoglycan that is abundant in several ocular tissues, including the vitreous. Like other proteoglycans, opticin may have the ability to bind and regulate the release of growth factors. Previous work has shown that isoforms of growth hormone (GH) are present in the embryonic retina, where they may act as a growth factor. The current study was conducted to investigate the possibility that opticin binds retinal GH in the vitreous of the chick embryo. METHODS. The vitreous and retina of embryonic day-8 chicks were examined for the presence of opticin and GH, by Western immunoblot analysis, coimmunoprecipitation, and immunocytochemistry. RESULTS. Opticin associated with GH in the embryonic vitreous to produce a 60- to 62-kDa complex. Opticin and GH were also colocalized in the retina in retinal ganglion cells. CONCLUSIONS. The binding of retinal GH by opticin in the vitreous suggests that GH, secreted by the retinal ganglion cells, may be sequestered and concentrated in the vitreous and could act there as a paracrine differentiation factor in ocular development. During development, opticin could therefore regulate growth factor-like actions of retinal GH, both in the vitreous and the retinal ganglion cells. The physiological roles of GH in this location remain to be determined, but may include the regulation of cell proliferation and cell death MH - Canada MH - Mexico|Queretaro PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 14 U4 - Ophthalmology U5 - J;Article AV - English IS - 0146-0404 UR - ISI:000186801200048 L2 - EXTRACELLULAR-MATRIX; CELL-PROLIFERATION; CHICK-EMBRYO; HUMAN EYE; FACTOR-I; PROTEIN; DIFFERENTIATION; IDENTIFICATION; GH; NEUROGENESIS SO - Investigative Ophthalmology & Visual Science 2003 ;44(12):5404-5409 9455 UI - 8037 AU - Santamaria A AU - Salvatierra-Sanchez R AU - Vazquez-Roman B AU - Santiago-Lopez D AU - Villeda-Hernandez J AU - Galvan-Arzate S AU - Jimenez-Capdeville ME AU - Ali SF AD - US FDA, Div Neurotoxicol, HFT 132, Natl Ctr Toxicol Res,Neurochem Lab, Jefferson, AR 72079, USAInst Nacl Neurol & Neurocirug Manuel Velasco Suar, Dept Neuroquim, Mexico City, DF, MexicoAli, SF, US FDA, Div Neurotoxicol, HFT 132, Natl Ctr Toxicol Res,Neurochem Lab, Jefferson, AR 72079 USA TI - Protective effects of the antioxidant selenium on quinolinic acid-induced neurotoxicity in rats: in vitro and in vivo studies AB - Quinolinic acid (QUIN), a well known excitotoxin that produces a pharmacological model of Huntington's disease in rats and primates, has been shown to evoke degenerative events in nerve tissue via NMDA receptor (NMDAr) overactivation and oxidative stress. In this study, the antioxidant selenium (as sodium selenite) was tested against different markers of QUIN-induced neurotoxicity under both in vitro and in vivo conditions. In the in vitro experiments, a concentration-dependent effect of selenium was evaluated on the regional peroxidative action of QUIN as an index of oxidative toxicity in rat brain synaptosomes. In the in vivo experiments, selenium (0.625 mg per kg per day, i.p.) was administered to rats for 5 days, and 2 h later animals received a single unilateral striatal injection of QUIN (240 nmol/muL). Rats were killed 2 h after the induction of lesions with QUIN to measure lipid peroxidation and glutathione peroxidase (GPx) activity in striatal tissue. In other groups, the rotation behavior, GABA content, morphologic alterations, and the corresponding ratio of neuronal damage were all evaluated as additional markers of QUIN-induced striatal toxicity 7 days after the intrastriatal injection of QUIN. Selenium decreased the peroxidative action of QUIN in synaptosomes both from whole rat brain and from the striatum and hippocampus, but not in the cortex. A protective concentration-dependent effect of selenium was observed in QUIN-exposed synaptosomes from whole brain and hippocampus. Selenium pre-treatment decreased the in vivo lipid peroxidation and increased the GPx activity in QUIN-treated rats. Selenium also significantly attenuated the QUIN-induced circling behavior, the striatal GABA depletion, the ratio of neuronal damage, and partially prevented the morphologic alterations in rats. These data suggest that major features of QUIN-induced neurotoxicity are partially mediated by free radical formation and oxidative stress, and that selenium partially protects against QUIN toxicity MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 31 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0022-3042 UR - ISI:000183900300022 L2 - antioxidant defense;excitotoxin;neurotoxicity;N-methyl-D-aspartate receptor;quinolinic acid;selenium;INDUCED LIPID-PEROXIDATION; NF-KAPPA-B; MAMMALIAN THIOREDOXIN REDUCTASE; INDUCED HIPPOCAMPAL DAMAGE; NITRO-L-ARGININE; HUNTINGTONS-DISEASE; OXIDATIVE STRESS; CORPUS STRIATUM; NEURODEGENERATIVE DISORDERS; GLUTATHIONE PEROXIDASE SO - Journal of Neurochemistry 2003 ;86(2):479-488 9456 UI - 9279 AU - Santamaria RI AU - Soto C AU - Zuniga ME AU - Chamy R AU - Lopez-Munguia A AD - UNAM, Inst Biotechnol, Cuernavaca 62271, Morelos, MexicoPontificia Univ Catolica Valparaiso, Valparaiso, ChileLopez-Munguia, A, UNAM, Inst Biotechnol, Apartado Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - Enzymatic extraction of oil from Gevuina avellana, the Chilean hazelnut AB - Chilean hazelnut (Gevuina avellana) oil is highly appreciated in the cosmetic and pharmaceutical industries. Hazelnut oil (oil content calculated on 49% dry basis) is traditionally obtained by pressing, a low-efficiency process that results in a low-quality product. In this work, the conventional process was compared with two enzymatic alternatives in which commercial enzymes were used to increase the oil extraction yield: (i) extraction in aqueous medium and (ii) extraction by pressing after an enzymatic treatment. The effect of various parameters on the extraction yield was studied to define the most satisfactory processing conditions. These included reaction time, temperature, enzyme concentration, and, in the aqueous medium extraction process, the water/seed ratio, particle size, and pH. Although pressing is the better alternative, in both processes enzyme treatment improved extraction yields (94 and 98% for aqueous medium extraction and pressing after enzyme treatment, respectively, compared to 52% obtained in the conventional process). Moreover, the quality of the oil obtained is the same as or better than that of oil obtained by the conventional process MH - Chile MH - Mexico|Morelos PB - CHAMPAIGN: AMER OIL CHEMISTS SOC A O C S PRESS RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0003-021X UR - ISI:000180781800007 L2 - enzymatic extraction;enzyme-based oil extraction;Gevuina avellana;hazelnut oil;PRETREATMENT; OILSEEDS SO - Journal of the American Oil Chemists Society 2003 ;80(1):33-36 9457 UI - 6692 AU - Santana G AU - Sheremetov LB AU - Contreras M AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoRussian Acad Sci, St Petersburg Inst Informat & Automat, SPIIRAS, St Petersburg 196140, RussiaSantana, G, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Agent platform security architecture AB - Security is a critical parameter for the expansion and wide usage of agent technology. In this paper, the basic security services to deal effectively with security threats existing throughout the agent life-cycle are identified. Security architecture in order to build a security service for Component Agent Platform (CAP) is defined MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000187294700045 SO - Computer Network Security 2003 ;2776():457-460 9458 UI - 6731 AU - Santillan AA AU - Camargo CA AU - Ramirez-Rivera A AU - gado-Enciso I AU - Rojas-Martinez A AU - Cantu-Diaz F AU - Barrera-Saldana HA AD - Univ Autonoma Nuevo Leon, Dept Bioquim, Fac Med, Monterrey, MexicoHosp Enfermedades Cardiovasc & Torax, Lab Fisiol Pulmonar, Ctr Med Nacl Norte, IMSS, Monterrey, MexicoBrigham & Womens Hosp, Dept Med, Channing Lab, Boston, MA, USACamargo, CA, Harvard Univ, Sch Med, Massachusetts Gen Hosp, Dept Emergency Med, 55 Fruit St,Clin Bldg 397, Boston, MA 02114 USA TI - Association between beta(2)-adrenoceptor polymorphisms and asthma diagnosis among Mexican adults AB - Background: Recent studies demonstrate that genetic variations in the human beta(2)-adrenergic receptor (beta(2)AR) structure at codons 16 and 27 alter receptor function in vitro and are associated with asthma severity and airway hyperresponsiveness but have not been linked to asthma diagnosis. The nature of the relation in a more homogeneous population is uncertain. Objective: We determined frequencies of these polymorphisms to explore the association between beta(2)AR haplotypes and asthma diagnosis and phenotype. Methods: This is a population-based, case-control study that involves a total sample of 907 unrelated Mexican Mestizos. Genotyping at beta(2)AR was identified by polymerase chain reaction-restriction fragment length polymorphism analysis. Multivariate logistic regression analysis was used to estimate the odds ratio (OR) of the association between beta(2)AR haplotype status and asthma diagnosis. Results: A significant inverse association was found between subjects with Glu27 allele (OR, 0.5; 95% CI, 0.4 to 0.7) and Gly16-Glu27 alleles (OR, 0.5; 95% CI, 0.3 to 0.8) and asthma. Sex differences in this association were explored, given the complex relation between sex and asthma. Among men, a positive association was present between the "Gly16 allele without Glu27" (OR, 2.9; 95% CI, 1.26 to 6.8) and asthma. In contrast, a lower risk of asthma was found among women Gly16-Glu27 alleles (OR, 0.3; 95% CI, 0.2 to 0.6). Nocturnal asthma was associated with the Gly16 allele (OR, 1.8; 95% CI, 1.3 to 2.6). Conclusions: Variation in the beta(2)AR gene is associated in the pathogenesis of asthma and acts as a disease modifier in nocturnal asthma MH - USA MH - Mexico|Nuevo Leon PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 20 U4 - Allergy;Immunology U5 - J;Article AV - English IS - 0091-6749 UR - ISI:000187154200010 L2 - alleles;asthma;beta 2-adrenoceptor polymorphism;case-control studies;genetics;genotype;phenotype;BRONCHIAL HYPERRESPONSIVENESS; BETA-2-ADRENERGIC RECEPTOR; GENETIC POLYMORPHISMS; ADRENOCEPTOR; POPULATION; RESPONSIVENESS; EXPRESSION; HAPLOTYPES; PROMOTER; REGION SO - Journal of Allergy and Clinical Immunology 2003 ;112(6):1095-1100 9459 UI - 8450 AU - Santillan M AU - Hernandez-Perez R AU - gado-Lezama R AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoSantillan, M, McGill Univ, Ctr Nonlinear Physiol & Med, 3655 Promenade Sir William Osler, Montreal, PQ H3G 1Y6, Canada TI - A numeric study of the noise-induced tremor in a mathematical model of the stretch reflex AB - A mathematical model of the stretch reflex for the cat soleus muscle is presented. The time-delay differential equations of the model are solved using the fourth-order Runge-Kutta algorithm, introducing a Gaussian-noise term to simulate the environmental noise. The muscle response dynamics are then studied under various levels of average muscle activation. Finally, the feasibility of explaining the so-called physiological tremor from the properties of the stretch reflex mechanisms is discussed by comparing our results with reported experimental evidence. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000182892900008 L2 - dynamic systems;mathematical biology;muscle contraction;stochastic simulation;MUSCLE-CONTRACTION; HUMAN MOTONEURONS; MOTOR UNITS; CAT SOLEUS; HILL-TYPE; FORCE; PATTERNS; BEHAVIOR SO - Journal of Theoretical Biology 2003 ;222(1):99-115 9460 UI - 8187 AU - Santos EM AU - Gonzalez-Fernandez C AU - Jaime I AU - Rovira J AD - Univ Burgos, Dept Biotechnol & Food Sci, Burgos 09001, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoRovira, J, Univ Burgos, Dept Biotechnol & Food Sci, Pza Misael Banuelos S-N, Burgos 09001, Spain TI - Physicochemical and sensory characterisation of Morcilla de Burgos, a traditional Spanish blood sausage AB - Morcilla de Burgos is a popular cooked blood sausage produced in the region around Burgos in the north of Spain. Physicochemical and sensory properties of this traditional product were investigated in order to support the claim for a Protected Geographical Indication. Products from 14 manufacturers were analysed for pH, water activity (a(w)), moisture, ether-extractable fat, starch, protein, total sugar, ash, iron and sodium contents as well as sensory parameters related to visual, olfactory, texture and flavour attributes. Principal component analysis confirmed the existence of three varieties of Morcilla de Burgos. Morcillas from group I were characterised by a notable blood smell and blood and pepper flavour, a high pH, and aw and a high protein content. Morcillas from group II were characterised by strong cumin smell and flavour and a high softness. Morcillas from group III had a high onion odour, high presence of onion and high contents of fat, total sugar and fibre. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0309-1740 UR - ISI:000183607000026 L2 - blood sausage;characterisation;Morcilla;Multivariate analysis;CHEMOMETRIC MODEL; MEAT; SURVIVAL SO - Meat Science 2003 ;65(2):893-898 9461 UI - 9923 AU - Santoyo MC AU - Loiseau G AU - Sanoja RR AU - Guyot JP AD - IRD, Unite Nutr Alimentat Societes R106, F-34394 Montpellier 5, FranceAMIS, CIRAD, F-34032 Rennes, FranceUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoGuyot, JP, IRD, Unite Nutr Alimentat Societes R106, BP 64501,911 Ave Agropolis, F-34394 Montpellier 5, France TI - Study of starch fermentation at low pH by Lactobacillus fermentum Ogi E1 reveals uncoupling between growth and alpha-amylase production at pH 4.0 AB - Lactobacillus fermentum Ogi E I is an amylolytic heterofermentative lactic acid bacterium previously isolated from ogi, a Benin maize sourdough. In the present study, the effect of different pH between 3.5 and 6.0 on starch fermentation products and a-amylase production was investigated. Whereas a pH of 5.0 was optimum for specific growth rate and lactic acid production, growth was only slightly affected at suboptimal pH of 4.0 and 6.0. Over a pH range of 6.0 to 3.5, yields of product formation from substrate and of biomass relative to ATP were constant. These results showed that L. fermentum Ogi E I was patlicularly acid tolerant, and well adapted to the acid conditions that develop during natural fermentation of cereal doughs. This acid tolerance may partly explain the dominance of L. fermentum in various traditional African sourdoughs. Surprisingly, alpha-amylase production, unlike growth, dropped dramatically when the strain was cultivated at pH 4.0 with starch. With maltose as substrate, the yield of alpha-amylase relative to biomass remained unchanged at pH 4.0 and 5.0, unlike that observed with starch. Based on the distribution of enzyme activity between extra- and intracellular fractions and fermentation kinetics, it appears that starch was first hydrolyzed into dextrins by alpha-amylase activity, and maltose was produced from dextrins by extracellular enzyme activity, transferred into the cell and then hydrolyzed into glucose by intracellular alpha-glucosidase. (C) 2002 Elsevier Science B.V All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0168-1605 UR - ISI:000178952500008 L2 - Lactobacillus;amylase;alpha-glucosidase;acid tolerance;heterolactic;lactic acid fermentation;sourdough;starch;maltose;LACTIC-ACID BACTERIA; MAIZE DOUGH; SOURDOUGH; AMYLOVORUS; ENERGETICS; PLANTARUM; STRAINS; BENIN; MAWE SO - International Journal of Food Microbiology 2003 ;80(1):77-87 9462 UI - 7787 AU - Sarmiento-Franco L AU - Mcnab JM AU - Pearson A AU - Belmar-Casso R AD - Univ Autonoma Yucatan Mexico, Fac Vet Med & Anim Sci, Merida, Yucatan, MexicoRoslin Inst Edinburgh, Roslin, Midlothian, ScotlandUniv Edinburgh, Ctr Trop Vet Med, Roslin, Midlothian, ScotlandSarmiento-Franco, L, Univ Autonoma Yucatan Mexico, Fac Vet Med & Anim Sci, Apdo Postal 4-116, Merida, Yucatan, Mexico TI - The effect of chaya (Cnidoscolus aconitifolius) leaf meal and of exogenous enzymes on amino acid digestibility in broilers AB - 1. The apparent ileal nitrogen (N) and amino acid digestibilities in chaya leaf meal (CLM) (Cnidoscolus aconitifolius) with added enzymes, and the same variables in diets containing different amounts of CLM were studied in chickens. 2. In the first experiment pectinase, beta-glucanase, and pectinase + beta-glucanase were added to CLM. In the second experiment, there were three diets based on maize and soybean: 0, 150 and 250 g/kg CLM. 3. Pectinase significantly increased both lysine and overall amino acid digestibilities in CLM. 4. In experiment 2, the amino acid digestibility in birds fed on CLM250 was lower than that from birds fed on either control or CLM150. Only the digestibilities of alanine, arginine and proline were lower in birds fed on CLM150 than in those fed on the control diet. Nitrogen digestibility was lower in birds fed on the CLM250 diet than on either control or CLM150 diets. These findings were attributed to the increasing concentration of fibre with increasing dietary CLM MH - Mexico|Yucatan MH - United Kingdom PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0007-1668 UR - ISI:000184576400017 L2 - APPARENT DIGESTIBILITY; POULTRY FEEDSTUFFS; TITANIUM-DIOXIDE; ILEAL DIGESTA; FIBER; CHICKENS; PERFORMANCE; COCKERELS; LOSSES; DIETS SO - British Poultry Science 2003 ;44(3):458-463 9463 UI - 8513 AU - Sarmiento-Franco L AU - Sandoval-Castro CA AU - Mcnab JM AU - Quijano-Cervera R AU - Reyes-Ramirez RR AD - Univ Yucatan, FMVZ, Merida, Yucatan, MexicoRoslin Nutr Ltd, Roslin Biotechnol Ctr, Roslin EH25 9TT, Midlothian, ScotlandSarmiento-Franco, L, Univ Yucatan, FMVZ, Apto Postal 4-116 Itzimna, Merida, Yucatan, Mexico TI - Effect of age of regrowth on chemical composition of chaya (Cnidoscolus aconitifolius) leaves AB - The chemical composition of chaya (Cnidoscolus spp) leaves, as a promissory edible tropical shrub for both humans and animals was evaluated. The chemical composition of C aconitifolius did not differ significantly with age of regrowth, with the exception of ether extractives and the oxalic acid content. Galactose, glucose and xylose were the most important sugars found in the insoluble fraction and, galactose and uronic acid were the main components in the soluble portion of non-starch polysaccharides (NSP). There was a total content of 197.2 g kg(-1) NSP, of which 68.72 and 31.26% corresponded to the insoluble and soluble components respectively. The amino acid composition of C aconitifolius ranged from 0.416 for lysine to 0.641 for valine relative to their contents in soyabean meal. Nevertheless, without exception, the concentrations of all the essential amino acids in C aconitifolius were higher than the corresponding values in alfalfa, a fibrous foodstuff widely acceptable in diets for farm animals. (C) 2003 Society of Chemical Industry MH - Mexico|Yucatan MH - United Kingdom PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000182682600016 L2 - chaya;chemical composition;amino acids;DIETARY FIBER; NONSTARCH POLYSACCHARIDES; PERFORMANCE SO - Journal of the Science of Food and Agriculture 2003 ;83(6):609-612 9464 UI - 8231 AU - Sarti E AU - Rajshekhar V AD - Secretaria Salud Carpio, Inst Diagnost & Referencia Epidemiol, Santo Tomas 11340, DF, MexicoChristian Med Coll & Hosp, Dept Neurol Sci, Vellore 632004, Tamil Nadu, IndiaSarti, E, Secretaria Salud Carpio, Inst Diagnost & Referencia Epidemiol, 470 Col, Santo Tomas 11340, DF, Mexico TI - Measures for the prevention and control of Taenia solium taeniosis and cysticercosis AB - Taeniosis and cysticercosis due to Taenia solium are public health problems in many developing countries. Many studies of this parasitic zoonosis have focused on clinical features, diagnosis, treatment, surveillance, epidemiology and risk factors analysis. More recently projects on community and mass intervention strategies had been conducted in several rural areas worldwide focused on pig vaccination, pig cysticercosis treatment, human mass treatment, infrastructure development, as well as health education campaigns. Their advantages, disadvantages and public health impact have been published. This document discusses the feasibility and limitations of these interventions in order to assist countries in selection the best strategy for the prevention and control of this disease; we emphasized the specific strategies that might be recommended in different demographical situations. (C) 2003 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000183576700018 L2 - control;cysticercosis;taeniosis;mass treatment;health education;pigs vaccination;RURAL GUATEMALAN COMMUNITIES; PORCINE CYSTICERCOSIS; MEXICO; PIGS; VILLAGE; VACCINATION; OXFENDAZOLE; INFECTIONS; NEUROCYSTICERCOSIS; INTERVENTION SO - Acta Tropica 2003 ;87(1):137-143 9465 UI - 6839 AU - Satinger D AU - Avila O AU - Horowitz YS AD - Nucl Res Ctr Negev, Nucl Safety Dept, IL-84190 Beer Sheva, IsraelInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoBen Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, IsraelSatinger, D, Nucl Res Ctr Negev, Nucl Safety Dept, POB 9001, IL-84190 Beer Sheva, Israel TI - Modelling the energy dependence of helium ion TL fluence response using the extended track interaction model AB - Helium ion thermoluminescence (TL) fluence response is calculated as a function of particle energy from I to 10 MeV in the framework of the extended track interaction model (ETIM). The results of Monte Carlo calculations of absorbed dose as a function of the radial distance from the He ion track axis are employed for 1, 2, 2.6, 3.5, 4.95, 6.76 and 10 MeV He ions in condensed phase LiF. The radial dose is then transformed to radial occupation probabilities for the TL trapping and luminescent defect centres using optical absorption (OA) dose filling constants based on experimental gamma/electron OA dose response measurements. The radial defect occupation probabilities are used to estimate the track structure parameters (TSPs) r(100) (full occupation defining the track core), r(50) (50% occupation) and r(h) (track extension). These, of course, may be different for the trapping centres, luminescent centres and competitive centres due to their different charge carrier trapping cross-sections leading to different dose-filling constants. He ion TL fluence response (linearity, supralinearity and saturation) is then modelled in the framework of the ETIM with the TSPs and dose filling constants as input parameters. It is illustrated that the maximum supralinearity f(n)(max) increases smoothly with increasing particle energy due to the gradually increasing track radial extension and the increase in the number of electrons escaping the parent track, N-e, relative to the number recombining within the parent track, N-w MH - Israel MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000186845900006 L2 - SUPRALINEARITY; IRRADIATION; EFFICIENCY; TLD-100 SO - Journal of Physics D-Applied Physics 2003 ;36(21):2619-2626 9466 UI - 9201 AU - Sato MO AU - Yamasaki H AU - Sako Y AU - Nakao M AU - Nakaya K AU - Plancarte A AU - Kassuku AA AU - Dorny P AU - Geerts S AU - itez-Ortiz W AU - Hashiguchi Y AU - Ito A AD - Asahikawa Med Coll, Dept Parasitol, Asahikawa, Hokkaido 0788510, JapanAsahikawa Med Coll, Anim Lab Med Res, Asahikawa, Hokkaido 0788510, JapanUniv Nacl Autonoma Mexico, Dept Microbiol & Parasitol, Fac Med, Mexico City 04510, DF, MexicoSokoine Univ Agr, Dept Vet Microbiol & Parasitol, Fac Vet Med, Morogoro, TanzaniaInst Trop Med Prince Leopold, B-2000 Antwerp, BelgiumUniv Cent Ecuador, Cent Int Zoonosis, Quito, EcuadorKochi Med Sch, Dept Parasitol, Kochi 7838505, JapanIto, A, Asahikawa Med Coll, Dept Parasitol, Asahikawa, Hokkaido 0788510, Japan TI - Evaluation of tongue inspection and serology for diagnosis of Taenia solium cysticercosis in swine: usefulness of ELISA using purified glycoproteins and recombinant antigen AB - Evaluation of serology using glycoproteins (GPs) purified by preparative isoelectric focusing (pH 8.8) and recombinant chimeric antigen (RecTs) of Taenia solium was carried out using (1) blood samples on filter papers from pigs infected with different doses of eggs of T solium in Mexico, (2) serum samples from pigs found infected naturally in Vietnam and Ecuador and (3) serum samples from pigs suspected to be infected with T solium by tongue inspection in Tanzania. Antibody responses (IgG) were detectable in experimentally infected pigs confirmed harbouring 16 or more cysts at necropsy from 30 days after egg inoculation. One of three pigs naturally infected and harbouring 2.5 cysts/kg muscle and most of pigs harbouring = 5.0 cysts/kg were also seropositive by ELISA. Although pigs may be infected with other taeniid species such as Taenia hydatigena, pigs harbouring this parasite were negative in ELISA. Approximately, 76 and 78% of sera from pigs having nodule(s) in the tongue (positive tongue inspection) were serologically positive by both ELISA and immunoblot, respectively. Furthermore, approximately 34 and 18% of sera from pigs having no nodules in the tongue (negative tongue inspection) were also seropositive by ELISA and immunoblot, respectively. ELISA using the two antigens was more sensitive than immunoblot and reliable for differentiation of pigs infected with cysticerci of T. solium from those either uninfected or infected with other taeniid species. Pigs without nodule by tongue inspection should be checked serologically in endemic areas. (C) 2002 Elsevier Science B.V. All rights reserved MH - Belgium MH - Ecuador MH - Japan MH - Mexico|Distrito Federal MH - Tanzania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000180956200004 L2 - Taenia solium;cysticercosis;pigs;serology;ELISA;glycoproteins;recombinant antigen;tongue inspection;PORCINE CYSTICERCOSIS; IRIAN-JAYA; NEUROCYSTICERCOSIS; PIGS; METACESTODES; INDONESIA; SERODIAGNOSIS; PREVALENCE; INFECTIONS; JAYAWIJAYA SO - Veterinary Parasitology 2003 ;111(4):309-322 9467 UI - 7439 AU - Sattar N AU - Williams K AU - Han TS AU - Gonzalez-Villalpando C AU - Lean MEJ AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, Dept Med, San Antonio, TX 78229, USAUniv Glasgow, Glasgow Royal Infirm, Dept Pathol Biochem, Glasgow G31 2ER, Lanark, ScotlandUniv Cambridge, Addenbrookes Hosp, Sch Med, Cambridge CB2 2QQ, EnglandCtr Estudios Diabet, Mexico City, DF, MexicoUniv Glasgow, Glasgow Royal Infirm, Dept Human Nutr, Glasgow G31 2ER, Lanark, ScotlandHaffner, SM, Univ Texas, Hlth Sci Ctr, Dept Med, 7873, San Antonio, TX 78229 USA TI - Prospective relation of C-reactive protein with type 2 diabetes MH - USA MH - United Kingdom MH - Mexico|Distrito Federal PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Endocrinology & Metabolism U5 - J;Letter AV - English IS - 0149-5992 UR - ISI:000185505400077 L2 - REPLACEMENT; THERAPY SO - Diabetes Care 2003 ;26(5):1657-1658 9468 UI - 6537 AU - Saucedo-Munoz ML AU - Komazaki SI AU - Hashida T AU - Shoji T AU - Lopez-Hirata VM AD - Tohoku Univ, Inst Invest Fractura, Sendai, Miyagi 980, JapanInst Politecn Nacl, Mexico City 07051, DF, MexicoInst Tecnol Mororan, Hokkaido 0508585, JapanSaucedo-Munoz, ML, Tohoku Univ, Inst Invest Fractura, Sendai, Miyagi 980, Japan TI - Application of the small-punch test on the evaluation of cryogenic toughness of isothermally aged austenitic stainless steels AB - Two types of austenitic stainless steels JJ1 and JN1 were isothermally aged at temperatures from 873 to 1173 K for 10 to 1000 min in order to study the microstructural evolution and its effect on fracture toughness at cryogenic temperatures. The Charpy V-Notch (CVN) and Small-Punch (SP)Testing methods were conducted at 77 K to evaluate the toughness of both solution treated and aged specimens. The fracture energy at 77 K determined for both methods showed a significant decrease with aging time for both steels. A linear correlation between the fracture energies of both methods was found. The intergranular precipitation of carbides and nitrides was responsible for the fracture toughness deterioration. The scanning electron microscope fractographs showed an intergranular brittle fracture and its fraction also increased with aging time and temperature. The presence of a more abundant intergranular precipitation resulted in a more rapid decrease in fracture toughness with aging time in JN1 steel due to its higher content of C and N, compared to that of JJ1 steel MH - Japan MH - Mexico|Distrito Federal PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 2 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - Spanish IS - 0034-8570 UR - ISI:000187670100006 L2 - small-punch test;fracture toughness;austenitic stainless steels;PRECIPITATION; IRRADIATION; CR2N SO - Revista de Metalurgia 2003 ;39(5):378-386 9469 UI - 8144 AU - Saucedo J AU - Calvet N AU - Hartmann L AU - Raymond J AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSaucedo, J, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - The spatial distribution of fluorescent H-2 emission near T Tauri AB - New subarcsecond far-UV observations of T Tau with Hubble Space Telescope STIS show spatially resolved structures in the 2" x 2" area around the star. The structures are apparent in multiline emission of fluorescent H-2 pumped by Lyalpha. One emission structure follows the cavity walls observed around T Tau N in scattered light in the optical. A temperature of greater than or equal to1000 K is required to have a high enough population in the H-2 to produce the observed fluorescent lines; in the cool environment of the T Tau system, shock heating is required to achieve this temperature at distances of a few tens of AU. Fluorescent H-2 along the cavity wall represents the best evidence to date for the action of low-density, wide opening angle outflows driving cavities into the molecular medium at scales less than or equal to100 AU. A southern region of emission consists of two arcs, with shape and orientation similar to the arcs of H-2 2.12 mum and forbidden-line emission crossing the outflow associated with the embedded system T Tau S. This region is located near the centroid of forbidden-line emission at the blueshifted lobe of the north-south outflow MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183617400019 L2 - stars : formation;stars : individual (T Tauri);stars : pre-main-sequence;stars : winds, outflows;ultraviolet : stars;HUBBLE-SPACE-TELESCOPE; HERBIG-HARO OBJECTS; BINARY-SYSTEM; MOLECULAR-HYDROGEN; BURNHAMS NEBULA; YOUNG STARS; SPECTRA; CLOUD; JETS; SPECTROSCOPY SO - Astrophysical Journal 2003 ;591(1):275-282 9470 UI - 7941 AU - Sauret-Gueto S AU - Ramos-Valdivia A AU - Ibanez E AU - Boronat A AU - Rodriguez-Concepcion M AD - Univ Barcelona, Dept Biochem & Biol Mol, Fac Quim, E-08028 Barcelona, SpainIPN, CINVESTAV, Dept Biotecnol & Bioengn, Mexico City 07360, DF, MexicoRodriguez-Concepcion, M, Univ Barcelona, Dept Biochem & Biol Mol, Fac Quim, Marti Franques 1-7, E-08028 Barcelona, Spain TI - Identification of lethal mutations in Escherichia coli genes encoding enzymes of the methylerythritol phosphate pathway AB - The recently elucidated methylerythritol phosphate (MEP) pathway for isoprenoid biosynthesis is essential in eubacteria (including Escherichia coli), the malaria parasite, and plants, but is absent in animals. Therefore, the pathway enzymes are promising targets for the development of novel herbicides and antimicrobials that are potentially innocuous for humans. For an effective drug design, it is important to identify the residues required to preserve the structure and activity of the MEP pathway enzymes. Here, we report a genetic approach to identify such residues in E. coli. A strain harboring a synthetic operon that allows the production of isoprenoids through a MEP-independent pathway was used to screen for the otherwise lethal loss-of-function point mutations in the MEP pathway genes generated by ethylmethane sulfonate (EMS) mutagenesis. Besides confirming the role of residues involved in catalysis, our results define regions within several of the proteins with a potential key role for enzyme function. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000184240300031 L2 - EMS;Escherichia coli;isoprenoids;methylerythritol;mevalonate;mutagenesis;1-DEOXY-D-XYLULOSE 5-PHOSPHATE REDUCTOISOMERASE; 2-C-METHYL-D-ERYTHRITOL 4-PHOSPHATE PATHWAY; PLASTID ISOPRENOID BIOSYNTHESIS; (E)-4-HYDROXY-3-METHYLBUT-2-ENYL DIPHOSPHATE; NONMEVALONATE PATHWAY; 2C-METHYL-D-ERYTHRITOL 2,4-CYCLODIPHOSPHATE; DIMETHYLALLYL DIPHOSPHATE; ISOPENTENYL DIPHOSPHATE; CRYSTAL-STRUCTURE; 4FE-4S PROTEIN SO - Biochemical and Biophysical Research Communications 2003 ;307(2):408-415 9471 UI - 8448 AU - Savoie JM AU - Mata G AD - INRA, Unite Rech Champignons, F-33883 Villenave Dornon, FranceInst Ecol AC, Dept Hongos, Xalapa 91000, Veracruz, MexicoSavoie, JM, INRA, Unite Rech Champignons, BP 81, F-33883 Villenave Dornon, France TI - Trichoderma harzianum metabolites pre-adapt mushrooms to Trichoderma aggressivum antagonism AB - Trichoderma spp. is the cause of green mold, a disorder that affects cultivated mushrooms. The aims of the study were to establish whether improvement of mushroom resistance to Trichoderma aggressivum could be obtained by inducing reaction mechanisms before contact with the pathogen and whether this ability was species or strain dependent. Twenty nine isolates of Agaricus bisporus, 29 isolates of Lentinula edodes and 18 isolates of Pleurotus spp. were studied. The effect of T harzianum metabolites on mycelial growth of these isolates was evaluated on YMEA (yeast, malt extract and agar), supplemented or not with Lysing Enzymes from T harzianum (Sigma(R), L1412). Mycelial growth generally was affected by Lysing Enzymes, but some L. edodes and Pleurotus spp. adapted to Lysing Enzymes. When mycelium was taken from a first culture with Lysing Enzymes and placed on YMEA with Lysing Enzymes for a second culture. their growth rate was not different from those of the controls. In the case of A. bisporus, only partial adaptation was obtained with a few isolates. The effect of adaptation to Lysing Enzymes on resistance to T. aggressivum was assayed for one strain of each group. Trichoderma aggressivum was exposed to the margin of 5- to 9-day-old Mushroom colonies. Agaricus bisporus produced brown droplets, and T. aggressivum overgrew its mycelium. Lentinula edodes and P ostreatus produced brown lines blocking the progression of T. harzianum, both on YMEA and YMEA plus Lysing Enzymes. The line was visible after 3 d on YMEA and after only 2 d on YMEA plus Lysing Enzymes. Improvement in the resistance to antagonists by introduction of some of their metabolites to the culture medium is a method for Mushroom protection MH - France MH - Mexico|Veracruz PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 3 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000182874500001 L2 - Agaricus;green mold;laccases;Lentinula;Pleurotus;EXTRACELLULAR LACCASE PRODUCTION; AGARICUS-BISPORUS; LENTINULA-EDODES; WHEAT-STRAW; GREEN MOLD; TH2; VARIABILITY; CULTIVATION; COMPOST SO - Mycologia 2003 ;95(2):191-199 9472 UI - 7728 AU - Scarfi S AU - Giovine M AU - Pintus R AU - Millo E AU - Clavarino E AU - Pozzolini M AU - Sturla L AU - Stock RP AU - Benatti U AU - Damonte G AD - Univ Genoa, Dept Expt Med, Biochem Sect, I-16132 Genoa, ItalyUniv Genoa, Ctr Excellence Biomed Res, I-16132 Genoa, ItalyCNR, I-16132 Genoa, ItalyG Gaslini Inst Children, I-16147 Genoa, ItalyUniv Nacl Autonoma Mexico, Inst Biotecnol, Morelos, MexicoDamonte, G, Univ Genoa, Dept Expt Med, Biochem Sect, Viale Benedetto XV I, I-16132 Genoa, Italy TI - Selective inhibition of inducible cyclo-oxygenase-2 expression by antisense peptide nucleic acids in intact murine macrophages AB - Prostaglandins are important molecules involved in inflammation and immunomodulation. The rate-limiting step in the synthesis of these potent mediators is the expression of the enzyme cyclooxygenase (COX). The isoform responsible, COX-2, is encoded by an immediate-early gene induced by various pro-inflammatory agents in macrophages. Selective blockade of COX-2 by the use of an antisense strategy would overcome the undesirable side effects of conventional inhibitors. Here we describe cellular internalization and activity of a novel class of oligonucleotide analogues named peptide nucleic acids (PNAs) as inhibitors of COX-2 translation. In particular, we designed two antisense murine COX-2 PNA molecules, directed against a mRNA region spanning the AUG translation-initiation codon and a homopurinic sequence inside the COX-2 mRNA reading frame. These two PNA sequences, used separately or mixed together, demonstrated the capacity to inhibit the translation of murine COX-2 enzyme in a cell-free translation model using a rabbit retculocyte lysate model. Since PNAs display very low natural permeability across lipids bilayers, the two molecules were also re-synthesized, modified to be used in intact cells by means of linkage to a hydrophobic peptide to obtain membrane-diffusable PNA chimaerae. Finally, stimulated macrophages were found to be affected strongly by these two compounds, used separately or together, monitoring inhibition of COX-2 synthesis by Western blot analysis of total lysates and enzymic activity via radioactive assay on the microsomal fractions MH - Italy MH - Mexico|Morelos PB - LONDON: PORTLAND PRESS RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0885-4513 UR - ISI:000184671200009 L2 - cyclo-oxygenase-2 (COX-2);murine macrophage;peptide nucleic acid (PNA);NITRIC-OXIDE SYNTHASE; PROSTAGLANDIN ENDOPEROXIDE SYNTHASE; THYMINE-SUBSTITUTED POLYAMIDE; STRAND-DISPLACEMENT; GENE-EXPRESSION; CYCLOOXYGENASE-2; BINDING; PNA; DNA; LIPOPOLYSACCHARIDE SO - Biotechnology and Applied Biochemistry 2003 ;38():61-69 9473 UI - 7783 AU - Scarpa R AU - Drucker AG AU - Anderson S AU - Ferraes-Ehuan N AU - Gomez V AU - Risopatron CR AU - Rubio-Leonel O AD - Univ York, Dept Environm, York YO10 5DD, N Yorkshire, EnglandInt Livestock Res Inst, Addis Ababa, EthiopiaUniv London Imperial Coll Sci Technol & Med, Ashford TN25 5AH, Kent, EnglandUniv Autonoma Yucatan, FMVZ, Merida 97100, Yucatan, MexicoScarpa, R, Univ York, Dept Environm, York YO10 5DD, N Yorkshire, England TI - Valuing genetic resources in peasant economies: the case of 'hairless' creole pigs in Yucatan AB - We report the results of a choice-experiment study to model preferences over a selection of breed traits of 'creole' pigs. The study was conducted amongst households of backyard producers and small farmers rearing this local breed in Yucatan, Mexico. Hypothetical choice data were collected to estimate the preference of households over alternative pigs profiles whose attributes distinguish creole pigs from the potentially more productive, yet less adapted exotic breeds currently threatening to severely displace this locally adapted animal genetic resource (AnGR). The observed choices are employed to estimate a series of random utility models whose results are first tested for preference equality between households and small farmers, then endogenous segmentation is allowed within households by means of latent class models. Stated-preference based estimates are found to be of the same magnitude as revealed-preference producers costs. As a consequence the method is deemed to be appropriate for the valuation of non-market functions in production. Estimates conditional on household characteristics are then presented and discussed. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Ethiopia MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Ecology;Economics;Environmental Sciences;Environmental Studies U5 - J;Article NT - DUPLICATE AV - English IS - 0921-8009 UR - ISI:000184588000010 L2 - biodiversity values;genetic resources;stated preference;choice experiments;latent class models;livestock values;non-market values;creole pig;RANDOM UTILITY SO - Ecological Economics 2003 ;45(3):427-443 9474 UI - 8607 AU - Schafer R AU - Gorin T AU - Seligman TH AU - Stockmann HJ AD - Univ Marburg, Fachbereich Phys, D-35032 Marburg, GermanyUniv Freiburg, Fac Phys, D-79014 Freiburg, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoSchafer, R, Univ Marburg, Fachbereich Phys, Renthof 5, D-35032 Marburg, Germany TI - Correlation functions of scattering matrix elements in microwave cavities with strong absorption AB - The scattering matrix was measured for microwave cavities with two antennae. It was analysed in the regime of overlapping resonances. The theoretical description in terms of a statistical scattering matrix and the rescaled Breit-Wigner approximation has been applied to this regime. The experimental results for the auto-correlation function show that the absorption in the cavity walls yields an exponential decay. This behaviour can only be modelled using a large number of weakly coupled channels. In comparison to the autocorrelation functions, the cross-correlation functions of. the diagonal S-matrix elements display a more pronounced difference between regular and chaotic systems MH - Germany MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000182454900026 L2 - CORRELATION-HOLE; BILLIARDS; SPECTRA; STATISTICS; MOLECULES; ENSEMBLE; DYNAMICS; SYSTEMS; PHYSICS; FAMILY SO - Journal of Physics A-Mathematical and General 2003 ;36(12):3289-3302 9475 UI - 7415 AU - Scheffer M AU - Portielje R AU - Zambrano L AD - Agr Univ Wageningen, Dept Aquat Ecol & Water Qual Management, NL-6700 DD Wageningen, NetherlandsRIZA, NL-8200 AA Lelystad, NetherlandsUNAM, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoScheffer, M, Agr Univ Wageningen, Dept Aquat Ecol & Water Qual Management, POB 8080, NL-6700 DD Wageningen, Netherlands TI - Fish facilitate wave resuspension of sediment AB - The resuspension of sediment by waves or currents is a major cause of turbidity in many shallow waters. Here we show that bottom-feeding fish greatly facilitate this process by reducing the erosion resistance of the sediment. We use a fish-removal experiment from a large Dutch lake to show that the absence of fish makes sediment resistant to wind effects, and we use controlled tab experiments to demonstrate that the effect of fish can be explained by the characteristic hole-punching behavior used in the search for food. Undisturbed sediment in the laboratory consolidated rapidly. The critical water velocity needed for resuspension roughly doubled in 2 weeks. However, the acquired erosion resistance could be virtually eliminated by holes corresponding to only 2% of the sediment area. An analysis of a model based on our experimental results suggested that benthivorous fish may prevent sediment consolidation that, in the absence of fish, would sufficiently stabilize the sediment during a quiet period to resist wave resuspension during subsequent windy periods. Our results imply that, even in exposed shallow lakes that are turbid because of wind resuspension, a temporary reduction of fish stock may work as "shock therapy" to restore an alternative stable clear-water state MH - Mexico|Distrito Federal MH - Netherlands PB - WACO: AMER SOC LIMNOLOGY OCEANOGRAPHY RP - NOT IN FILE U3 - TC 21 U4 - Limnology;Oceanography U5 - J;Article AV - English IS - 0024-3590 UR - ISI:000185433700019 L2 - WIND-INDUCED RESUSPENSION; SHALLOW LAKE; BENTHIVOROUS FISH; BIOMANIPULATION; REDUCTION; MODELS SO - Limnology and Oceanography 2003 ;48(5):1920-1926 9476 UI - 7421 AU - Schippers S AU - Muller A AU - McLaughlin BM AU - Aguilar A AU - Cisneros C AU - Emmons ED AU - Gharaibeh MF AU - Phaneuf RA AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyQueens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North IrelandHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USAUniv Nevada, Dept Phys, Reno, NV 89557, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoSchippers, S, Univ Giessen, Inst Kernphys, D-35392 Giessen, Germany TI - Photoionization studies of the B+ valence shell: experiment and theory AB - We have investigated L-shell photoionization (PI) of IS ground-state and 3 p, metastable states of the Be-like ion, B+, in the photon energy range 22.4-31.3 eV, at an experimental energy resolution of 25 meV Absolute PI cross sections have been measured using a photon-ion merged-beams arrangement at the Advanced Light Source. Detailed calculations using the semi-relativistic Breit-Pauli R-matrix approach suggest a fraction of 29% of metastable ions in the primary beam of the experiment. Excellent agreement is observed between the theoretical predictions and the experimental high-resolution PI cross sections. The present results are compared with earlier experimental and theoretical work. The cross section for PI of B+ ground-state ions can be very well described by an analytic formula derived from quantum defect theory MH - Germany MH - Mexico|Morelos MH - United Kingdom MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000185542700005 L2 - CONFIGURATION INTERACTION; CROSS-SECTION; IONS SO - Journal of Physics B-Atomic Molecular and Optical Physics 2003 ;36(16):3371-3381 9477 UI - 8323 AU - Schippers S AU - Muller A AU - Ricz S AU - Bannister ME AU - Dunn GH AU - Bozek J AU - Schlachter AS AU - Hinojosa G AU - Cisneros C AU - Aguilar A AU - Covington AM AU - Gharaibeh MF AU - Phaneuf RA AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyInst Nucl Res ATOMKI, H-4001 Debrecen, HungaryOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Colorado, JILA, Boulder, CO 80309, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Nevada, Dept Phys, Reno, NV 89557, USASchippers, S, Univ Giessen, Inst Kernphys, Leihgesterner Weg 217, D-35392 Giessen, Germany TI - Photoionization of Sc2+: Experimental link with photo recombination of Sc3+ by application of detailed balance AB - The principle of microscopic time-reversal of physical processes, detailed balance, is widely used and depended upon in the theoretical community as a connection between the inverse processes of photorecombination (PR) and photoionization (PI). This paper reports on a novel use of detailed balance and the comparison of experimental results obtained by two very distinct techniques to determine both the metastable fraction of an ion beam and partial Sc3+ PR cross sections and partial Sc2+ PI cross sections for the ground state and for two metastable states. The Sc2+ to Sc3+ system presents a unique opportunity to obtain comprehensive state-selective information by combining results from PR and PI experiments. (C) 2002 Elsevier Science B.V. All rights reserved MH - Germany MH - Hungary MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000183211200057 L2 - photoionization;photo recombination;detailed balance;merged beams;synchrotron radiation;heavy-ion storage ring;IONS SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2003 ;205():297-300 9478 UI - 8774 AU - Schippers S AU - Muller A AU - Ricz S AU - Bannister ME AU - Dunn GH AU - Schlachter AS AU - Hinojosa G AU - Cisneros C AU - Aguilar A AU - Covington AM AU - Gharaibeh MF AU - Phaneuf RA AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyHungarian Acad Sci, Inst Nucl Res, ATOMKI, H-4001 Debrecen, HungaryOak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Nevada, Dept Phys, Reno, NV 89557, USASchippers, S, Univ Giessen, Inst Kernphys, D-35392 Giessen, Germany TI - Photoionization of Sc2+ ions by synchrotron radiation: Measurements and absolute cross sections in the photon energy range 23-68 eV AB - Cross sections for the photoionization (PI) of Sc2+ ions with [Ar]3d ground-state configuration have been measured by employing the merged ion-photon beams method. The Sc2+ ions were produced from metallic vapor in an electron cyclotron resonance ion source, and the photon beam was generated by an undulator in the electron-synchrotron storage ring of the advanced light source of the Lawrence Berkeley National Laboratory. The experimental photon energy range 23-68 eV encompasses the direct 3d and 3p photoionization thresholds. The experimental photoion spectrum is dominated by autoionizing resonances due to 3p excitations predominantly decaying via Coster-Kronig and super-Coster-Kronig transitions. Individual resonances located around Eapproximate to40.2 eV have been measured with an instrumental energy spread DeltaE as low as 1.2 meV, corresponding to a resolving power of E/(DeltaE) around 33 500. The fractions of metastable ions in the Sc2+ ion beam are obtained by comparing the photoionization cross section with the recently measured [Schippers , Phys. Rev. A 65, 042723 (2002)] cross section for the time-reversed process of photorecombination of Sc3+ ions. Absolute strengths of several 3p(5) 3d(2) and 3p(5) 3d 4s PI resonances have been determined. They are the same as the corresponding resonance strengths for isoelectronic Ca+ ions MH - Germany MH - Hungary MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000181965900045 L2 - ATOMIC SCANDIUM; RECOMBINATION; PHOTORECOMBINATION; CA+; PHOTOEXCITATION; RESONANCE; REGION; SC3+; 3P SO - Physical Review A 2003 ;67(3): 9479 UI - 7763 AU - Schmid-Grendelmeier P AU - Welsh O AD - Univ Zurich Hosp, Dept Dermatol, CH-8091 Zurich, SwitzerlandUniv Autonoma Neuvo Leon, Sch Med, Dept Dermatol, Monterrey, MexicoSchmid-Grendelmeier, P, Univ Zurich Hosp, Dept Dermatol, Gloriastr 31, CH-8091 Zurich, Switzerland TI - Newer antifungal agents - Reply MH - Mexico|Nuevo Leon MH - Switzerland PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Dermatology U5 - J;Letter AV - English IS - 0190-9622 UR - ISI:000184566100041 L2 - TINEA-CAPITIS; DOUBLE-BLIND; GRISEOFULVIN; TERBINAFINE; ITRACONAZOLE; CHILDREN; THERAPY SO - Journal of the American Academy of Dermatology 2003 ;49(2):357-358 9480 UI - 7516 AU - Schondube JE AU - Santana E AU - Ruan-Tejeda I AD - Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAUniv Guadalajara, Ctr Univ Costa Sur, Dept Ecol & Recursos Nat, Inst Manantlan Ecol & Conservac Biodiversidad, Autlan Navarro 48900, Jalisco, MexicoSchondube, JE, Univ Arizona, Dept Ecol & Evolutionary Biol, Biol Sci W Room 310, Tucson, AZ 85721 USA TI - Biannual cycles of the Cinnamon-bellied Flowerpiercer AB - Biannual cycles of reproduction and molt are rare in birds, with most species exhibiting a single annual cycle. We studied the breeding and molting phenology of the Cinnamon-bellied Flowerpiercer (Diglossa baritula), a nectar feeding passerine, in western Mexico. Monthly captures from December 1994 to May 1998 revealed clear biannual breeding and molting cycles. The two breeding seasons took place from January to April (dry season) and from July to October (rainy season). Their July to October breeding season coincided with the single breeding season exhibited by resident hummingbirds at our study site. Even though flowerpiercers and hummingbirds use the same food resources, hummingbirds only molt and breed once a year. Male flowerpiercers breed and molt flight feathers twice a year, whereas females appear to breed only once. A higher proportion of females bred in the rainy season (90%) than in the dry season (30%), and they underwent a complete molt only during the rainy season. Proportions of males in breeding condition during the dry and the rainy season were similar (86 and 92%). Some males (40%) showed an incomplete molt in the dry season, while most males (80%) underwent a complete molt in the rainy season. Differences in proportions of breeding and molting individuals between the dry and the rainy season suggest that the dry season cycle is limited by food availability. We hypothesize that D. baritula individuals use soft fruits in addition to flowers to fuel their breeding during the dry season MH - USA MH - Mexico|Jalisco PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 1 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000185338600012 L2 - biannual cycles;breeding phenology;Diglossa baritula;Mexico;molt;nectar-eating birds;DOMESTICATED CANARIES; EQUATORIAL SPARROW; FOREST BIRDS; BROOD PATCH; REPRODUCTION; COST; FOOD; HUMMINGBIRDS; ABUNDANCE; PHENOLOGY SO - Biotropica 2003 ;35(2):250-261 9481 UI - 7780 AU - Schondube JE AU - del Rio CM AD - Univ Arizona, Dept Ecol & Evolut Biol, Tucson, AZ 85721, USAUniv Wyoming, Dept Zool & Physiol, Laramie, WY 82071, USASchondube, JE, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Antigua Carretera Patzcuaro No 8701, Morelia 58190, Michoacan, Mexico TI - Concentration-dependent sugar preferences in nectar-feeding birds: mechanisms and consequences AB - 1. Specialised nectar-feeding birds tend to prefer sucrose over glucose-fructose mixtures or to be indifferent when tested at concentrations close to 584 mmol L-1 sucrose equivalents. The role of the potential interaction between sugar composition and concentration on the sugar preferences of these birds, however, has not been explored. 2. We tested the hypothesis that sugar preferences in nectar-feeding birds are concentration-dependent. We predicted that at high concentrations they would prefer sucrose over hexoses, whereas at low sugar concentrations they would prefer hexoses. We expected birds to show differences in food intake that matched their sugar preferences when they fed on equicaloric solutions of sucrose and 1 : 1 mixture of glucose and fructose. Consequently, the curves describing the relationship between food intake and sugar concentration for these two sugar solutions should cross. We tested these hypotheses in two species of nectar-feeding birds: the Cinnamon-bellied Flowerpiercer, Diglossa baritula (Wagler) and the Magnificent Hummingbird, Eugenes fulgens (Swainson). 3. The sugar preferences of both species were concentration dependent. At lower concentrations they preferred hexoses, whereas at higher concentrations they shifted their preference to sucrose. However, these concentration-dependent preferences were not matched by parallel differences in intake. 4. Although nectar composition and concentration are often discussed as two different floral traits, our results show that they have a synergistic effect on the sugar preferences of nectar-feeding birds MH - Mexico|Michoacan MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Ecology U5 - J;Article AV - English IS - 0269-8463 UR - ISI:000184573900004 L2 - animal-plant coevolution;nectar composition;osmotic concentration;physiological constraints;sugar assimilation;FORAGING EFFICIENCY; FLORAL NECTARS; HUMMINGBIRDS; FOOD; CONSTITUENTS; RESPONSES; BALANCE; DIETARY; DILUTE; COSTS SO - Functional Ecology 2003 ;17(4):445-453 9482 UI - 7970 AU - Schuch D AU - Moshinsky M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, GermanySchuch, D, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Coherent states and dissipation for the motion of a charged particle in a constant magnetic field AB - We deal with the motion of a charged particle in A constant magnetic field when immersed in a medium that exerts some type of friction. We analyse the problem classically and also quantum mechanically. In the latter case we use coherent state solutions of the problem that, for large energies, compared with the one associated with the cyclotron frequency, reduce to the classical limit. To study the dynamical behaviour we use time-dependent wave packets that can be constructed by superposition of the coherent states MH - Germany MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000184057000027 L2 - LANGEVIN EQUATION; SYSTEM; QUANTIZATION; DYNAMICS; TIME SO - Journal of Physics A-Mathematical and General 2003 ;36(23):6571-6585 9483 UI - 8206 AU - Schulze-Makuch D AU - Goodell P AU - Kretzschmar T AU - Kennedy JF AD - Univ Texas, Dept Geol Sci, El Paso, TX 79968, USACICESE, Dept Geol, Div Ciencias Tierra, Ensenada, Baja California, MexicoNew Mexico Water Resources Res Inst, Las Cruces, NM 88003, USASchulze-Makuch, D, Univ Texas, Dept Geol Sci, El Paso, TX 79968, USA TI - Microbial and chemical characterization of a groundwater flow system in an intermontane basin of southern New Mexico, USA AB - Groundwater of the southern Jornada del Muerto Basin, an intermontane basin structure associated with the Rio Grande rift located in south-central New Mexico, USA, was analyzed chemically and microbially. A microbial phospholipid fatty acids (PLFA) analysis revealed a sparse microbial population consisting of relatively simple microorganisms with no major population changes along the flow system. A nucleic acid (DNA) analysis of the groundwater resulted in the identification of ten eubacterial and one archeal species. Chemical analyses revealed that sulfate along with calcium, magnesium, iron, and manganese is removed by about an order of magnitude in concentration from the recharge area to the discharge area. The removal of iron, manganese, magnesium, and to some extent calcium can be explained by oxidation reactions and the precipitation of dolomite. Sulfate and additional calcium are most likely removed by the precipitation of gypsum. Thiobacillus spp. are oxidizing metal sulfides that occur as subsurface sulfide mineral deposits to sulfuric acid, which subsequently reacts with calcium carbonate and water to precipitate gypsum. The presence of these sulfide deposits exposed to oxygenated water in the deep groundwater flow system significantly alters its chemical and bacteriological composition MH - Mexico|Baja California MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 1431-2174 UR - ISI:000183532400009 L2 - aerobic groundwater flow system;Gypsum precipitation;molecular techniques;sulfide oxidation;GRADIENT GEL-ELECTROPHORESIS; 16S RIBOSOMAL-RNA; AMMONIA-OXIDIZING BACTERIA; GRAM-NEGATIVE BACTERIA; HYDROXY FATTY-ACIDS; COMMUNITY STRUCTURE; SUBSURFACE; POPULATIONS; PROFILES SO - Hydrogeology Journal 2003 ;11(3):401-412 9484 UI - 6938 AU - Schunck FE AU - Mielke EW AD - Univ Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoSchunck, FE, Univ Cologne, Inst Theoret Phys, D-50923 Cologne, Germany TI - General relativistic boson stars AB - There is accumulating evidence that (fundamental) scalar fields may exist in nature. The gravitational collapse of such a boson cloud would lead to a boson star (BS) as a new type of a compact object. As with white dwarfs and neutron stars, a limiting mass exists similarly, below which a BS is stable against complete gravitational collapse to a black hole. According to the form of the self-interaction of the basic constituents and spacetime symmetry, we can distinguish mini-, axidilaton, soliton, charged, oscillating and rotating BSs. Their compactness prevents a Newtonian approximation; however, modifications of general relativity, as in the case of Jordan-Brans-Dicke theory as a low-energy limit of strings, would provide them with gravitational memory. In general, a BS is a compact, completely regular configuration with structured layers due to the anisotropy of scalar matter, an exponentially decreasing 'halo', a critical mass inversely proportional to the constituent mass, an effective radius and a large particle number. Due to the Heisenberg principle, a completely stable branch exists, and as a coherent state, it allows for rotating solutions with quantized. angular momentum. In this review, we concentrate on the fascinating possibilities of detecting, the various subtypes of (excited) BSs: possible signals, include gravitational redshift and (micro-)lensing, emission of gravitational waves, or, in the case of a giant BS, its dark matter contribution to the rotation curves of galactic halos MH - Germany MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Review AV - English IS - 0264-9381 UR - ISI:000186589100004 L2 - KLEIN-GORDON EQUATIONS; SCALAR-TENSOR GRAVITY; YANG-MILLS EQUATIONS; SPHERICALLY SYMMETRICAL SOLUTIONS; NONBARYONIC COMPACT OBJECT; PONDERABLE SOLITON STARS; STELLAR PROPER MOTIONS; DARK-MATTER PARTICLES; FLAT ROTATION CURVES; FERMION STARS SO - Classical and Quantum Gravity 2003 ;20(20):R301-R356 9485 UI - 9011 AU - Scior T AU - Morales IM AU - Eisele SJG AU - Domeyer D AU - Laufer S AD - Univ Amer Puebla, Dept Chem & Biol, San Andes Cholula 72820, Pue, MexicoUniv Autonoma Puebla, Dept Pharm Benemerita, Puebla 72570, MexicoLab Clin Puebla, Dept Mol Biol, Puebla 72530, MexicoUniv Tubingen, Inst Pharmaceut, D-72076 Tubingen, GermanyEisele, SJG, Univ Amer Puebla, Dept Chem & Biol, San Andes Cholula 72820, Pue, Mexico TI - Antitubercular isoniazid and drug resistance of Mycobacterium tuberculosis - A review AB - Isoniazid is one of the most potent drugs available for tuberculosis treatment. As a pro-drug it requires activation, which is performed by catalase/peroxidase. The active principle, whose identity has not yet been determined unambiguously, then acts on at least one target molecule, the enoyl-acyl carrier protein, required for the synthesis of the vital mycolic acids present in the cell wall of the bacterium. Some other targets have been proposed in order to explain the unusual potency of isoniazid; however, the supporting data are still controversial. We thoroughly discuss the action of isoniazid, resistance mechanisms, and the possible active product, which includes an isonicotinic acid-NADH adduct as well as a meta-isomer of. NADH. Both structures have been probed positively in a 3D modeling analysis MH - Germany MH - Mexico|Puebla PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Pharmacology & Pharmacy U5 - J;Review AV - English IS - 0365-6233 UR - ISI:000181465400001 L2 - Mycobacterium tuberculosis;isoniazid;isonicotinic acid;drug resistance;katG;inhA;CARRIER PROTEIN REDUCTASE; CATALASE-PEROXIDASE KATG; ENOYL-ACP REDUCTASE; CRYSTAL-STRUCTURE; ENZYMATIC CHARACTERIZATION; SER315THR SUBSTITUTION; MOLECULAR METHODS; INHA; GENE; MUTATIONS SO - Archiv der Pharmazie 2003 ;335(11-12):511-525 9486 UI - 9415 AU - Scott RL AU - Watts C AU - Payan JG AU - Edwards E AU - Goodrich DC AU - Williams D AU - Shuttleworth WJ AD - USDA ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USAInst Med Ambiente & Desarrollo Sustentable, IMADES, Hermosillo, Sonora, MexicoInst Tecnol Sonora, Obregon, Sonora, MexicoUniv Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721, USAUniv Arizona, Dept Renewable Nat Resources, Tucson, AZ 85721, USAScott, RL, USDA ARS, SW Watershed Res Ctr, 2000 E Allen Rd, Tucson, AZ 85719 USA TI - The understory and overstory partitioning of energy and water fluxes in an open canopy, semiarid woodland AB - Eddy flux studies have traditionally focused on total ecosystem exchanges of energy and water by making measurements in the well-mixed surface layer, but this approach does not provide information about the partitioning of the total ecosystem fluxes between overstory and understory sources and sinks. In more open canopy environments, information about partitioning of fluxes is often required in order to understand the relative importance and functioning of key ecosystem components and their response to climate forcing. In this paper, we present results from a series of experiments carried out in a riparian mesquite (Prosopis velutina) woodland. Three eddy covariance systems were deployed before, during, and after the onset of the summer rainy season to measure energy and water fluxes. One eddy covariance system was installed on a tower to measure whole ecosystem fluxes. The other two were installed at a height of 2 m, one in a relatively closed understory patch and the other in a more open understory patch. Our results indicate that the understory and overstory moisture sources were mostly decoupled. The trees apparently had access to deep moisture sources, and thus, their water use was relatively insensitive to local precipitation. In contrast, the contribution of the understory to the total ecosystem fluxes was highly variable due to the presence or absence of near-surface soil moisture. Published by Elsevier Science B.V MH - USA MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 25 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000180417800001 L2 - evapotranspiration;eddy covariance;mesquite;Prosopis velutina;understory vegetation;transpiration rate;Savannah;PINE FOREST; DENSITIES; ECOSYSTEM; VAPOR; HEAT SO - Agricultural and Forest Meteorology 2003 ;114(3-4):127-139 9487 UI - 6240 AU - Seabra GDM AU - Ortiz JV AU - Kaplan IG AU - Zakrzewski VG AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico TI - Electron propagator theory calculation of photoionization intensities MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000187062501514 SO - Abstracts of Papers of the American Chemical Society 2003 ;226():U304-U304 9488 UI - 8935 AU - Segovia-Lerma A AU - Cantrell RG AU - Conway JM AU - Ray IM AD - New Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003, USAUniv Autonoma Chihuahua, Fac Ciencias Agr & Forestales, Chihuahua 33000, MexicoRay, IM, New Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88003 USA TI - AFLP-based assessment of genetic diversity among nine alfalfa germplasms using bulk DNA templates MH - Mexico|Chihuahua MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 9 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000181557500006 L2 - Medicago sativa;DNA bulking;genetic distance;MOLECULAR MARKER DIVERSITY; MAIZE INBREDS; MEDICAGO; RAPD; POPULATIONS; RFLP; ACCESSIONS; HETEROSIS; SUNFLOWER; DISTANCE SO - Genome 2003 ;46(1):51-58 9489 UI - 7385 AU - Segovia N AU - Armienta MA AU - Valdes C AU - Mena M AU - Seidel JL AU - Monnin M AU - Pena P AU - Lopez MBE AU - Reyes A AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoIGFUNAM, Mexico City 04510, DF, MexicoCNRS Hydrosci, UMR 5569, Montpellier, FranceSegovia, N, Inst Nacl Invest Nucl, Ap Post 18-1027, Mexico City 11801, DF, Mexico TI - Volcanic monitoring for radon and chemical species in the soil and in spring water samples AB - Soil radon has been monitored at two fixed stations in the northern flank of Popocatepetl Volcano, a high risk volcano located 60 km SE from Mexico City. Water samples from three springs were also studied for radon as well as major and trace elements. Radon in the soil was recorded using track detectors. Radon in the water samples was evaluated using the liquid scintillation method and an Alphaguard. The major elements were determined through conventional chemical methods and trace elements using an ICP-MS equipment. Soil radon levels were low, indicating a moderate diffuse degassing through the flanks of the volcano. Groundwater radon had almost no relation with the eruptive stages. Water chemistry was stable in the reported time (2000-2002). (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000185503400068 L2 - active volcano;soil and groundwater radon;SSNTD;major and trace elements;MEXICO SO - Radiation Measurements 2003 ;36(1-6):379-383 9490 UI - 8048 AU - Segura S AU - d'Eeckenbrugge GC AU - Lopez L AU - Grum M AU - Guarino L AD - Secretariat Pacific Community, Suva, FijiUACH, Chapingo 56230, MexicoCIAT, CIRAD, FLHOR, IPGR, Cali, ColombiaCIAT, IPGRI, Cali, ColombiaICRAF, IPGRI, Nairobi, KenyaGuarino, L, Secretariat Pacific Community, Suva, Fiji TI - Mapping the potential distribution of five species of Passiflora in Andean countries AB - Geographic location data for 383 accessions of five Passiflora species from five Andean countries ( P. cumbalensis, P. mixta, P. tripartita var. mollissima, P. natistipula, and P. manicata) were linked to interpolated continental surfaces of monthly mean rainfall, monthly mean temperature, and monthly mean diurnal temperature range. This permitted us to identify the potential distribution of each species and document its climatic adaptation. Maps are presented showing regions where the climate is similar to that in areas where each species has been found, but from which no collections have yet been made, thus representing possible geographical gaps in collections. Some species showed evidence of intra-specific variation in their climatic adaptation. The study of Passiflora diversity in Andean countries continues and these maps based on passport data are expected to be useful tools for the planning of both ex situ and in situ conservation activities MH - Colombia MH - Fiji MH - Kenya MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000183833700001 L2 - Andean countries;climatic adaptation;germplasm collecting;GIS;Passiflora SO - Genetic Resources and Crop Evolution 2003 ;50(6):555-566 9491 UI - 8172 AU - Sekerzh-Zenkovich S AU - Volkov B AU - Monzon CO AU - Sekerzh-Zenkovich D AD - Dept Matemat, Guadalajara 44420, Jalisco, MexicoMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, RussiaKONVEX COM, Moscow 117419, RussiaSekerzh-Zenkovich, S, Dept Matemat, Blvd M Garcia Barragan & Calz Olimp SR, Guadalajara 44420, Jalisco, Mexico TI - Asymptotic solutions of the problem on standing capillary-gravity waves in a fluid at near-critical modes AB - We construct asymptotic solutions of the nonlinear 2D problem on standing capillary-gravity waves at the interface between two fluids of different densities in the form of expansions in powers of the wave amplitude, which is assumed to be small. The solutions of the problem and nonlinear corrections to the wave frequency are obtained in Lagrange variables up to fourth-order infinitesimals. The solutions are studied in the problem parameter range where the second-order frequency corrections are zero (the "critical mode") or nearly zero ("near-critical modes"). We show that the amplitude-frequency curves in near-critical modes have two branches. A detailed analysis of the problem on waves on the free surface of a homogeneous fluid of finite depth as well as of the problem on internal waves on the interface between two semi-infinite fluid layers of different densities is carried out. The amplitude-frequency curves and wave profiles are presented graphically. The results are compared with laboratory experiments for gravity waves MH - Mexico|Jalisco MH - Russia PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 1061-9208 UR - ISI:000183504800006 L2 - WATER-WAVES SO - Russian Journal of Mathematical Physics 2003 ;10(2):173-184 9492 UI - 7175 AU - Selman M AU - Lin HM AU - Montano M AU - Jenkins AL AU - Estrada A AU - Lin ZW AU - Wang GR AU - DiAngelo SL AU - Guo XX AU - Umstead TM AU - Lang CM AU - Pardo A AU - Phelps DS AU - Floros J AD - Penn State Univ, Dept Cellular & Mol Physiol, Coll Med, Hershey, PA 17033, USAInst Nacl Enfermedades Resp, Mexico City, DF, MexicoPenn State Univ, Dept Hlth Evaluat Sci, Coll Med, Hershey, PA 17033, USAPenn State Univ, Dept Pediat, Coll Med, Hershey, PA 17033, USAPenn State Univ, Dept Comparat Med, Coll Med, Hershey, PA 17033, USAPenn State Univ, Dept Obstet & Gynecol, Coll Med, Hershey, PA 17033, USAUNAM, Fac Ciencias, Mexico City, DF, MexicoFloros, J, Penn State Univ, Dept Cellular & Mol Physiol, Coll Med, Hershey, PA 17033 USA TI - Surfactant protein A and B genetic variants predispose to idiopathic pulmonary fibrosis AB - Derangement in pulmonary surfactant or its components and alveolar collapse are common findings in idiopathic pulmonary fibrosis (IPF). Surfactant proteins play important roles in innate host defense and normal function of the lung. We examined associations between IPF and genetic polymorphic variants of surfactant proteins, SP-A1, SP-A2, SP-B, SP-C, and SP-D. One SP-A1 (6A(4)) allele and single nucleotide polymorphisms (SNPs) that characterize the 6A(4) allele, and one SP-B (B1580_C) were found with higher frequency (Pless than or equal to0.01) in nonsmoker and smoker IPF (n=84) subgroups, respectively, compared with healthy controls (n=194). To explore whether a tryptophan (present in 6A(4)) or an arginine (present in other SP-A1 alleles and in all SP-A2 alleles) at amino acid 219 alters protein behavior, two truncated proteins that varied only at amino acid 219 were oxidized by exposure to ozone. Differences in the absorption spectra (310-350 nm) between the two truncated recombinant SP-A proteins were observed both before and after protein oxidation, suggesting allele-specific aggregation differences attributable to amino acid 219. The SP-B SNP B1580_C (odds ratio:7.63; confidence interval:1.64-35.4; Pless than or equal to0.01), to be a risk factor for IPF smokers, has also been shown to be a risk factor for other pulmonary diseases. The SP-C and SP-D SNPs and SP-B-linked microsatellite markers studied did not associate with IPF. These findings indicate that surfactant protein variants may serve as markers to identify subgroups of patients at risk, and we speculate that these contribute to IPF pathogenesis MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 33 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0340-6717 UR - ISI:000186037500010 L2 - RESPIRATORY-DISTRESS-SYNDROME; NECROSIS-FACTOR-ALPHA; USUAL INTERSTITIAL PNEUMONIA; N-LINKED GLYCOSYLATION; D MARKER ALLELES; GLUTATHIONE DEFICIENCY; LUNG-DISEASE; IN-VITRO; POLYMORPHISMS; PATHOGENESIS SO - Human Genetics 2003 ;113(6):542-550 9493 UI - 8544 AU - Selman M AU - Cisneros-Lira J AU - Gaxiola M AU - Ramirez R AU - Kudlacz EM AU - Mitchell PG AU - Pardo A AD - UNAM, Fac Ciencias, Mexico City 04000, DF, MexicoInst Nacl Enfermedades Resp, Tlalpan, MexicoPfizer Global Res & Dev, Groton, CT, USAPardo, A, UNAM, Fac Ciencias, Apartado Postal 21-630,Coyoacan, Mexico City 04000, DF, Mexico TI - Matrix metalloproteinases inhibition attenuates tobacco smoke-induced emphysema in guinea pigs AB - Study objective: To evaluate the effect of CP-471,474 (Pfizer Global Research and Development; Groton, CT), a broad-spectrum inhibitor of matrix metalloproteinases (MMPs) in an experimental model of emphysema. Design: Randomized, double-blinded, controlled experiment. Setting: Biochemistry and morphology laboratories and animal research facility. Methods: Guinea pigs were exposed to cigarette smoke over 1 month, 2 months, and 4 months, and half of the animals received CP-471,474. Age-matched guinea pigs exposed to room air were used as control animals. After death, the lungs were lavaged with saline solution, and MMPs in the lavage fluid were determined by zymography and immunoblot. Lungs were fixed for histology, immunohistochemistry, and morphometry. Results: Following a 1-month exposure to tobacco smoke, semiquantitative histologic assessment showed moderate lung inflammation, which progressed in extent and severity and reached a peak at 2 months. CP-471,474 significantly reduced both the extent (p < 0.002) and severity (p < 0.05) of inflammation at 2 months. At 4 months, a spontaneous reduction of the inflammatory response was observed in both treated and untreated animals, and consequently no difference was observed between both. Emphysematous changes, revealed by a significant increase in the average size of alveoli, were detected at 2 months and 4 months of tobacco smoke exposure. The inhibitor significantly decreased the destructive lesions mainly at 2 months (p < 0.0001) and also at 4 months (p < 0.02). Smoking increased MMP-9 and MMP-1 activities as shown by zymography and immunoblot. Immunoreactive MMP-9 was mainly localized in alveolar and bronchiolar epithelial cells, macrophages, and airways smooth-muscle cells. Conclusion: These findings support a role for MMPs in the early inflammatory response and in the emphysematous lesions provoked by cigarette smoking MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 32 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000182773000048 L2 - collagenases;COPD;gelatinases;pulmonary emphysema;GELATINASE-B; ALVEOLAR MACROPHAGES; PULMONARY-EMPHYSEMA; IN-VITRO; MIGRATION; LUNGS; EXPRESSION; MICE; INFLAMMATION; PHENOTYPE SO - Chest 2003 ;123(5):1633-1641 9494 UI - 5702 AU - Seminoff JA AU - Karl SA AU - Schwartz T AU - Resendiz A AD - Univ Florida, Dept Zool, Archie Carr Ctr Sea Turtle Res, Gainesville, FL 32611, USAUniv S Florida, Dept Biol, Tampa, FL 33620, USAInst Nacl Ecol, Direcc Gen Vida Silvestre, Secretaria Medio Ambiente & Rec Nat, Ensenada, Baja California, MexicoSeminoff, JA, NOAA, Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Div Protected Resources, 8604 La Jolla Shores Dr, La Jolla, CA 92038 USA TI - Hybridization of the green turtle (Chelonia mydas) and hawksbill turtle (Eretmochelys imbricata) in the Pacific Ocean: Indication of an absence of gender bias in the directionality of crosses AB - On 5 September 1999 a juvenile sea turtle (BLA-428) was captured near Bahia de los Angeles, Gulf of California, Mexico. The presence of intermediate morphological characteristics suggested this turtle was a hybrid between a green turtle (Chelonia mydas) and hawksbill turtle (Eretmochelys imbricata). BLA-428 exhibited intermediate morphology with respect to number of post-orbital scales, number of prefrontal scales, presence of a median ridge on the lower mandible, carapace scute imbrication, marginal scute dentation, and number of claws on the front flippers. To determine the genotype of BLA-428, we amplified a single-copy nuclear locus CM-14A known to contain species-specific restriction site polymorphisms. Restriction enzyme digests (Dra I and Nde 1) of the CM-14A fragment indicated this individual was a cross between C. mydas and either E. imbricata or Caretta caretta. Sequence of the mitochondrial DNA control region indicated the mother was E. imbricata with a common Pacific haplotype. This is the first known case of a C. mydas x E. imbricata cross in the Pacific Ocean Basin. Further, it provides the first clear evidence for bi-directional hybridization in marine turtles MH - Mexico|Baja California MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000220888300008 L2 - MITOCHONDRIAL-DNA; INTERSPECIFIC HYBRIDIZATION; CARETTA-CARETTA; MARINE TURTLES; PHYLOGENY; EVOLUTION; MARKERS SO - Bulletin of Marine Science 2003 ;73(3):643-652 9495 UI - 6207 AU - Seminoff JA AU - Jones TT AU - Resendiz A AU - Nichols WJ AU - Chaloupka MY AD - SW Fisheries Sci Ctr, Natl Ocean & Atmospher Adm, Natl Marine Fisheries Serv, La Jolla, CA 92037, USAUniv Florida, Archie Carr Ctr Sea Turtle Res, Gainesville, FL 32611, USAUniv Florida, Dept Zool, Gainesville, FL 32611, USAUniv British Columbia, Dept Zool, Anim Care Ctr, Vancouver, BC V6T 1Z4, CanadaInst Nacl Ecol, Direcc Gen Vida Silvestre, Secretaria Medio Ambiente & Recursos Nat, Ensenada, Baja California, MexicoWildcoast Int Conservat Team, Davenport, CA 95017, USAUniv Queensland, Sch Econ, Brisbane, Qld 4072, AustraliaSeminoff, JA, SW Fisheries Sci Ctr, Natl Ocean & Atmospher Adm, Natl Marine Fisheries Serv, 8604 La Jolla Shores Dr, La Jolla, CA 92037 USA TI - Monitoring green turtles (Chelonia mydas) at a coastal foraging area in Baja California, Mexico: multiple indices to describe population status AB - From June 1995 to August 2002 we assessed green turtle (Chelonia mydas) population structure and survival, and identified human impact, at Bahia de los Angeles, a large bay that was once the site of the greatest sea turtle harvest rates in the Gulf of California, Mexico. Turtles were captured live with entanglement nets and mortality was quantified through stranding surveys and flipper tag recoveries. A total of 14,820 netting hours (617.5 d) resulted in 255 captures of 200 green turtles. Straight-carapace length and mass ranged from 46.0-100.0 cm (mean = 74.3 +/- 0.7 cm) and 14.5-145.0 kg (mean = 61.5 +/- 1.7 kg), respectively. The size-frequency distribution remained stable during all years and among all capture locations. Anthropogenic-derived injuries ranging from missing flippers to boat propeller scars were present in 4% of captured turtles. Remains of 18 turtles were found at dumpsites, nine stranded turtles were encountered in the study area, and flipper tags from seven turtles were recovered. Survival was estimated at 0.58 for juveniles and 0.97 for adults using a joint live-recapture and dead-recovery model (Burnham model). Low survival among juveniles, declining annual catch per unit effort, and the presence of butchered carcasses indicated human activities continue to impact green turtles at this foraging area MH - Australia MH - USA MH - Canada MH - Mexico|Baja California PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 16 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000188941800034 L2 - SELECTION; MODEL SO - Journal of the Marine Biological Association of the United Kingdom 2003 ;83(6):1355-1362 9496 UI - 8739 AU - Senn BM AU - Lopez-Macias C AU - Kalinke U AU - Lamarre A AU - Isibasi A AU - Zinkernagel RM AU - Hengartner H AD - Univ Zurich Hosp, Dept Pathol, Inst Expt Immunol, CH-8091 Zurich, SwitzerlandHosp Especialidades Ctr Med La Raza, Ctr Med Natl S XXI, Inst Mexicano Sugero Social, Unidad Invest Med Immunoquim, Mexico City, DF, MexicoHengartner, H, Univ Zurich Hosp, Dept Pathol, Inst Expt Immunol, Schmeltzbergstr 12, CH-8091 Zurich, Switzerland TI - Combinatorial immunoglobulin light chain variability creates sufficient B cell diversity to mount protective antibody responses against pathogen infections AB - To analyze how combinatorial light (L) chain diversity influences the B cell repertoire, we studied mice with a homozygous immunoglobulin-heavy-chain null mutation (muMT), in which the B cell developmental block was overridden by the expression of a transgenic immunoglobulin mu heavy (H) chain derived from a vesicular stomatitis virus Indiana serotype (VSVIND)-neutralizing Ab (T11muMT mice). The randomly integrated transgene could not undergo secondary rearrangements and was expressed in combination with endogenous kappa or lambda chains. T11muMT mice had a skewed B cell repertoire as evidenced by 30-60% VSV-IND-specific peripheral B cells and spontaneous VSV-IND-neutralizing serum titers. Upon immunization, T11muMT mice mounted specific IgM antibody responses against VSV-IND but, interestingly, they also responded against VSV New Jersey serotype (VSV-NJ), lymphocytic choriomeningitis virus, poliovirus and Salmonella typhi porins. Variable-region sequence analysis revealed that VSV-NJ-specific antibodies expressed numerous L chains in combination with the transgenic H chain, which was devoid of hypermutations. Thus, in T11muMT mice combinatorial L chain variability alone is able to build up a sufficiently complex B cell repertoire to mount protective immunoglobulin responses against a variety of pathogens MH - Mexico|Distrito Federal MH - Switzerland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Immunology U5 - J;Article AV - English IS - 0014-2980 UR - ISI:000182186500015 L2 - protective antibody;repertoire diversification;vesicular stomatitis virus;light chain;anti-viral antibody;VESICULAR STOMATITIS-VIRUS; ORIGINAL ANTIGENIC SIN; MONOCLONAL-ANTIBODIES; SALMONELLA-TYPHI; SOMATIC HYPERMUTATION; V(D)J RECOMBINATION; CLONAL SELECTION; VARIABLE REGION; MU-CHAIN; HEAVY SO - European Journal of Immunology 2003 ;33(4):950-961 9497 UI - 7890 AU - Senthilarasu S AU - Velumani S AU - Sathyamoorthy R AU - Subbarayan A AU - Ascencio JA AU - Canizal G AU - Sebastian PJ AU - Chavez JA AU - Perez R AD - Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas, Mexico City 07730, DF, MexicoKongunadu Arts & Sci Coll, R&D Dept Phys, Coimbatore 641029, Tamil Nadu, IndiaUniv Nacl Autonoma Mexico, CIE, Temixco 62580, Morelos, MexicoUniv Autonoma Mexico, IIM, Mexico City 04510, DF, MexicoVelumani, S, Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas, Mexico City 07730, DF, Mexico TI - Characterization of zinc phthalocyanine (ZnPc) for photovoltaic applications AB - Zinc phthalocyanine (ZnPc) is a promising candidate for solar-cell applications, because it is easily synthesized and is non-toxic to the environment. Recently, phthalocyanine (Pc) was considered by many researchers as the active part in all-organic solar cells, i.e. plastic solar cells. It is a self-assembling liquid crystal developed from a common deep-blue-green pigment. It exhibits a characteristic structural self-organization, which is reflected in an efficient energy migration in the form of extinction transport. In this paper we have report structural, surface morphological, optical and thermal properties of flash-evaporated zinc phthalocyanine thin films. The samples were prepared by using a vacuum coating unit on well-cleaned glass substrates under a pressure of 7x10(-6) Torr. A constant rate of evaporation (1 Angstrom/s) was maintained throughout the evaporation of the ZnPc thin films. A rotary drive was employed to obtain uniform thickness during the evaporation. Thicknesses of the films were monitored by a quartz-crystal thickness monitor and were cross verified by the multiple-beam interferometry technique. The X-ray-diffraction pattern reveals the crystalline nature of the films deposited at higher substrate temperatures. Scanning electron microscope and scanning probe microscope nanoscope studies were carried out to determine the surface uniformity and homogeneity of the films for interfacing and application purposes. All the films were found to possess small crystallites less than 100 nm in size. The optical transmittance measurements were carried out using a spectrophotometer in the visible region (400-800 nm) and the films were found to be absorbing in nature. The band gap of the ZnPc thin films is 1.97 eV and the optical transition was found to be direct and allowed. The absorption coefficient, extinction coefficient and refractive index of the ZnPc films were evaluated and the results are discussed. Differential scanning calorimetry studies of ZnPc films were carried out and a phase transition from alpha to beta was observed at 538 K MH - India MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 16 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000184296000008 SO - Applied Physics A-Materials Science & Processing 2003 ;77(3-4):383-389 9498 UI - 8912 AU - Sergeant N AU - Wattez A AU - Galvan-Valencia M AU - Ghestem A AU - David JP AU - Lemoine J AU - Sautiere PE AU - Dachary J AU - Mazat JP AU - Michalski JC AU - Velours J AU - Mena-Lopez R AU - Delacourte A AD - INSERM, Unite 422, F-59045 Lille, FranceIPN, CINVESTAV, Dept Fisiol Biofis & Neurociencias, Mexico City 07000, DF, MexicoCNRS, UMR 8576, UFR Biol, F-59655 Villeneuve Dascq, FranceLab Endocrinol Annelides, UPRESA 8017, F-59655 Villeneuve Dascq, FranceUniv Bordeaux 2, INSERM, EMI 9929, F-33076 Bordeaux, FranceCNRS, Inst Biochim & Genet Cellulaires, UMR 5095, F-33077 Bordeaux, FranceDelacourte, A, INSERM, Unite 422, 1 Pl Verdun, F-59045 Lille, France TI - Association of ATP synthase alpha-chain with neurofibrillary degeneration in Alzheimer's disease AB - Amyloid deposits and neurofibrillary tangles (NFT) are the two hallmarks that characterize Alzheimer's disease (AD). In order to find the molecular partners of these degenerating processes, we have developed antibodies against insoluble AD brain lesions. One clone, named AD46, detects only NFT. Biochemical and histochemistry analyses demonstrate that the labeled protein accumulating in the cytosol of Alzheimer degenerating neurons is the alpha-chain of the ATP synthase. The cytosolic accumulation of the alpha-chain of ATP synthase is observed even at early stages of neurofibrillary degenerating process. It is specifically observed in degenerating neurons, either alone or tightly associated with aggregates of tau proteins, suggesting that it is a new molecular event related to neurodegeneration. Overall, our results strongly suggest the implication of the alpha-chain of ATP synthase in neurofibrillary degeneration of AD that is illustrated by the cytosolic accumulation of this mitochondrial protein, which belongs to the mitochondrial respiratory system. This regulatory subunit of the respiratory complex V of mitochondria is thus a potential target for therapeutic and diagnostic strategies. (C) 2003 Published by Elsevier Science Ltd on behalf of IBRO MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 20 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000181585500005 L2 - neurodegeneration;oxidative phosphorylation;proteomic;microtubule-associated tau protein;paired helical filament;neurofibrillary tangle;PAIRED HELICAL FILAMENTS; POLYACRYLAMIDE-GEL ELECTROPHORESIS; AMYLOID PRECURSOR PROTEIN; TAU-PROTEIN; NEURODEGENERATIVE DISEASES; OXIDATIVE-PHOSPHORYLATION; ABNORMAL PHOSPHORYLATION; ANTIGENIC DETERMINANTS; MASS-SPECTROMETRY; MAMMALIAN-CELLS SO - Neuroscience 2003 ;117(2):293-303 9499 UI - 7491 AU - Serjeant S AU - Dunlop JS AU - Mann RG AU - Rowan-Robinson M AU - Hughes D AU - Efstathiou A AU - Blain A AU - Fox M AU - Ivison RJ AU - Jenness T AU - Lawrence A AU - Longair M AU - Oliver S AU - Peacock JA AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandUniv Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NZ, Kent, EnglandUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandINAOE, Puebla 72000, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandRoyal Observ, UK ATC, Edinburgh EH9 3HJ, Midlothian, ScotlandJoint Astron Ctr, Hilo, HI 96720, USAUniv Cambridge, Cavendish Lab, Cavendish Astrophys Grp, Cambridge CB3 0HE, EnglandUniv Sussex, CPES, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandSerjeant, S, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, Prince Consort Rd, London SW7 2BW, England TI - Submillimetre observations of the Hubble Deep Field and Flanking Fields AB - We present an extended analysis of the Submillimetre Common User Bolometer Array (SCUBA) observations of the Hubble Deep Field (HDF), expanding the areal coverage of the Hughes et al. study by a factor of 1.8 and containing at least three further sources in addition to the five in that study. We also announce the public release of the reduced data products. The map is the deepest ever made in the submillimetre (submm), obtained in excellent conditions (median 850-mum optical depth of 0.16). Two independent reductions were made, one with SURF and the other with a wholly algorithmic IDL analysis which we present in detail here. Of the three new sources, all appear to be at z greater than or similar to 0.9 and one is provisionally associated with an extremely red object (I - K > 5). There appears to be no significant cross-correlation signal between the 850-mum fluctuations and sources detected by ISOCAM, the Very Large Array (VLA) or Chandra, nor with very red objects (I - K > 4), nor quasars and quasar candidates in the HDF (notwithstanding a small number of individual weak candidate detections). This is consistent with interpretations where the 850-mum selected galaxies are at higher redshifts than those currently probed by ISOCAM/VLA, and predominantly not Compton-thin active galactic nuclei (AGN). There are only one or two compelling cases for the radio source being the submm source. Nevertheless, most SCUBA-HDF point sources have a nearby radio source apparently well-separated from the submm centroid MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000185253400021 L2 - surveys;galaxies : evolution;galaxies : formation;galaxies : starburst;cosmology : observations;infrared : galaxies;STAR-FORMATION HISTORY; SPECTRAL ENERGY-DISTRIBUTIONS; X-RAY SOURCES; HIGH-REDSHIFT; RADIO-EMISSION; STARBURST GALAXIES; SCUBA-8-MJY SURVEY; SOURCE EXTRACTION; DATA REDUCTION; POPULATION SO - Monthly Notices of the Royal Astronomical Society 2003 ;344(3):887-904 9500 UI - 9167 AU - Serna JAD AU - Martin KE AD - Univ Nuevo Leon, San Nicolas De Los Garza 66450, NL, MexicoBonneville Power Adm, Vancouver, WA 98666, USASerna, JAD, Univ Nuevo Leon, San Nicolas De Los Garza 66450, NL, Mexico TI - Improving phasor measurements under power system oscillations AB - A comprehensive description of the phasor estimation process leads to the ideal criteria that a digital filter must fulfill in order to provide more accurate phasor estimates under power system oscillations. The raised cosine filter, widely used in digital transmission, is described and proposed to approach those criteria. Simulation results corroborate an improvement in the performance (accuracy and speed) of these phasor estimates as compared with those obtained with the Fourier-boxcar filter, commonly used in present commercial applications MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000180981100022 L2 - amplitude demodulation;digital filters;FACTS;feedback control;network resonances;phasor measurement;power system oscillations;quadrature demodulation;windows SO - Ieee Transactions on Power Systems 2003 ;18(1):160-166 9501 UI - 9135 AU - Serrano J AU - Manjon FJ AU - Romero AH AU - Widulle F AU - Lauck R AU - Cardona M AD - Max Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyUniv Politecn Valencia, Dept Fis Aplicada, ES-03801 Alcoy, SpainIPIC&T, Adv Mat Dept, San Luis Potosi 78231, MexicoSerrano, J, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany TI - Dispersive phonon linewidths: The E-2 phonons of ZnO AB - Phonon linewidths can exhibit a large variation when either pressure or isotopic masses are changed. These effects yield detailed information about the mechanisms responsible for linewidths and lifetimes, e.g., anharmonicity or isotopic disorder. We report Raman measurements of the linewidth of the upper E-2 phonons of ZnO crystals with several isotopic compositions and their dependence on pressure. Changes by a factor of 12 are observed at a given temperature. Comparison with calculated densities of one-phonon states, responsible for isotope scattering, and of two-phonon states, responsible for anharmonic decay, yields a consistent picture of these phenomena. Isotopic disorder broadening by 7 cm(-1) is found in samples with mixed O-16-O-18 content, whereas the anharmonic processes involve decay into sums and differences of two phonons MH - Germany MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000180918300036 L2 - ISOTOPIC COMPOSITION; SEMICONDUCTORS; PRESSURE SO - Physical Review Letters 2003 ;90(5): 9502 UI - 9144 AU - Serrano J AU - Widulle F AU - Romero AH AU - Rubio A AU - Lauck R AU - Cardona M AD - Max Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyIPICyT, Adv Mat Dept, San Luis Potosi 78231, MexicoUniv Pais Vasco, Dpto Fis Mat, Fac Ciencias Quim, Ctr Mixto,CSIC,UPV,EHU, San Sebastian 20018, Basque Country, SpainDonostia Int Phys Ctr, San Sebastian 20018, Basque Country, SpainSerrano, J, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany TI - Dependence of phonon widths on pressure and isotopic mass: ZnO AB - Considerable attention has been devoted recently to the dependence of the widths of the Raman phonons of semiconductors on pressure and on isotopic mass. The dependence on pressure is usually small and monotonic unless the phonon happens to be close to a singularity of the two-phonon density of states (DOS) which determines its width. In the latter case, strong nonmonotonic dependences of the phonon width on pressure and on isotopic mass can appear. We have investigated the E-2(high) phonons of ZnO crystals with different isotopes and observed a wide range of FWHM depending on isotopic masses. Ab initio calculations of the two-phonon DOS provide an explanation for this variation of the FWHM: the E-2(high) frequency falls on a sharp ridge of the 2-DOS corresponding to combinations of TA and LA phonons. Changes in isotopic mass result in a motion of the E-2(high) frequency up and down that ridge which produces the changes in FWHM. These phenomena suggest a decrease of the FWHM with pressure which seems to be present in existing data obtained at 300 K. Similar phenomena are discussed for the E-2(low) phonons. Applications of the isotope and pressure techniques to the elucidation of two-phonon spectra will be presented MH - Germany MH - Mexico|San Luis Potosi MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000181009000009 L2 - RAMAN-SPECTRA; CUCL; GAP SO - Physica Status Solidi B-Basic Research 2003 ;235(2):260-266 9503 UI - 6182 AU - Serrano JA AU - Ceccanti B AU - Masciandaro G AU - Gallardo JF AU - Garcia-Izquierdo C AU - Escalante A AD - IRN, Col Postgraduados, Mexico City 56230, DF, MexicoCSIC, IRNA, Salamanca 37071, SpainCSIC, CEBAS, Salamanca 37071, SpainUniv Veracruzana, Xalapa 91090, Veracruz, MexicoCNR, I-56124 Pisa, ItalySerrano, JA, IRN, Col Postgraduados, Mexico City 56230, DF, Mexico TI - Structural chemical evaluation of the organic-mineral complex by liming of coffee-growing soils AB - Two acid soils grown with coffee in Veracruz (Mexico) were treated with different doses of CaCO3 in order to increase the pH. The content of soil organic carbon (SOC) and also C in the fraction <53 mum was measured in order to assess the impact of the liming on the organic-mineral complex. Impact of liming on the content of SOC was not observed, but the C content in the soil fraction <0.53 mum was significantly modified. Humin content decreased result of liming. Then, the soil humic-fractions should have a chemical transformation, as confirmed by soil pyrolisis MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - Spain PB - PISA 56100: IST CHIMICA AGRARIA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Soil Science U5 - J;Article AV - English IS - 0002-1857 UR - ISI:000188771900009 L2 - HUMIC SUBSTANCES; GREAT-PLAINS; MATTER; QUALITY; CLIMATE SO - Agrochimica 2003 ;47(5-6):236-249 9504 UI - 7966 AU - Servin M AU - Quiroga JA AU - Marroquin JL AD - Ctr Invest Opt AC, Leon 37150, Guanajuato, MexicoUniv Complutense Madrid, Dept Opt, E-28040 Madrid, SpainCtr Invest Matemat, Guanajuato 36000, Guanajuato, MexicoServin, M, Ctr Invest Opt AC, Apartado Postal 1-948, Leon 37150, Guanajuato, Mexico TI - General n-dimensional quadrature transform and its application to interferogram demodulation AB - Quadrature operators are useful for obtaining the modulating phase 0 in, interferometry and temporal signals in electrical communications. In carrier-frequency interferometry and electrical communications, one uses the Hilbert transform to obtain the quadrature of the signal. In these, cases the Hilbert transform gives the desired quadrature because the modulating phase is monotonically increasing. We propose an n-dimensional quadrature operator that transforms cos(phi) into -sin(phi) regardless of the-frequency spectrum of the signal. With the quadrature of the phase-modulated signal, one can easily calculate the value of phi over all the domain of interest. Our quadrature operator is composed of-two n-dimensional vector fields: One is related to the gradient of the image normalized with respect to local frequency magnitude, and the other is related to the sign of the local frequency of the signal: The inner product of these two vector fields gives us the desired quadrature signal. This quadrature operator is derived in the image space by use of differential vector calculus and in the frequency domain by use of a n-dimensional generalization of the Hilbert transform. A robust numerical algorithm is given to find the modulating phase of two-dimensional single-image closed-fringe interferograms by use of the ideas put forward. (C) 2003 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 15 U4 - Optics U5 - J;Article AV - English IS - 0740-3232 UR - ISI:000184010800014 L2 - PHASE; ORIENTATION SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2003 ;20(5):925-934 9505 UI - 7598 AU - Shelly TE AU - Rendon P AU - Hernandez E AU - Salgado S AU - McInnis D AU - Villalobos E AU - Liedo P AD - USDA, APHIS, Waimanalo, HI 96795, USAUniv Hawaii, Hawaiian Evolutionary Biol Program, Honolulu, HI 96822, USAAmer Embassy, USDA, APHIS, Methods Dev Sect, APO, AA 34024, USAEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUSDA ARS, Honolulu, HI 96822, USAUniv Hawaii, Dept Plant & Environm Protect Serv, Honolulu, HI 96822, USAShelly, TE, USDA, APHIS, POB 1040, Waimanalo, HI 96795, USA TI - Effects of diet, ginger root oil, and elevation on the mating competitiveness of male Mediterranean fruit flies (Diptera : Tephritidae) from a mass-reared, genetic sexing strain in Guatemala AB - The release of sterile males is a key component of an areawide program to eradicate the Mediterranean fruit fly, Ceratitis capitata (Wiedemann), from Guatemala and southern Mexico. The objective of our study was to assess the effects of adult diet, exposure to ginger root oil (Zingiber officinale Roscoe), and elevation on the mating competitiveness of the sterile males used in an areawide program. Sterile males were maintained on a protein-sugar (protein-fed) or a sugar-only (protein-deprived) diet and were exposed (for 4 h 1 d before testing) or not exposed to ginger root oil. In field-cage trials conducted at a high (1,500 m) and low (700 m) site, we monitored the influence of these treatments on the mating success of sterile males in competition with wild males (reared exclusively on the protein-sugar diet and without ginger root oil exposure) for wild females. Elevation and ginger root oil exposure had significant effects, with sterile males having higher mating success at the low-elevation site and ginger root oil-exposed males having greater success than ginger root oil-deprived males at both sites. Diet did not have a significant overall effect, and its influence varied with elevation (dietary protein seemed to provide an advantage at the high-elevation site but not at the low-elevation site). Possible implications of these findings for eradication programs against the Mediterranean fruit fly are discussed MH - Mexico|Chiapas MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000185018100014 L2 - Ceratitis capitata;sterile insect technique;mating competitiveness;CERATITIS-CAPITATA DIPTERA; FLY DIPTERA; REPRODUCTIVE SUCCESS; COPULA DURATION; ALPHA-COPAENE; EXPOSURE; STERILE; LONGEVITY; PROGRAMS; BEHAVIOR SO - Journal of Economic Entomology 2003 ;96(4):1132-1141 9506 UI - 7233 AU - Sheremetov LB AU - Martinez J AU - Guerra J AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoRussian Acad Sci, St Petersburg Inst Informat & Automat, Moscow 117901, RussiaNatl Tech Univ, Ctr Res Comp, Mexico City, DF, MexicoSheremetov, LB, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Agent architecture for dynamic job routing in holonic environment based on the theory of constraints AB - Holonic Manufacturing Systems have emerged over the last decade as strategy for manufacturing control system design to cope with rapid changes in manufacturing environment. Resource and component agents integrated in a holarchy ape proposed in this paper to dynamically perform co-operative job routing using a distributed algorithm based on the theory of constraints. Members of the holarchy negotiate and compromise on the optimal production flow in order to meet commitments made to each other. Being performed in a distributed manner, the architecture can increase the agility and responsiveness of an integrated system. This flexible structure has been, implemented in an open agent environment using JADE agent platform. The performance based results of the simulation experiments are presented and discussed in the paper MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000185936900012 SO - Holonic and Multi-Agent Systems for Manufacturing 2003 ;2744():124-133 9507 UI - 7637 AU - Sheremetov LB AU - Cortes JCR AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoRussian Acad Sci, St Petersburg Inst Informat & Automat, SPIIRAS, St Petersburg, RussiaNatl Polytech Inst, Ctr Res Comp, Mexico City, DF, MexicoAutonomous Metropolitan Univ, Mexico City, DF, MexicoSheremetov, LB, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Fuzzy coalition formation among rational cooperative agents AB - Formation of coalitions in multi-agent systems (MAS) enables the development of efficient organizations. In the article, a model of fuzzy cooperative game with coalitions is described. It extends the model of the Fuzzy coalition game with associated core, introduced by M. Mares by including in the fuzzy core (i) the fuzzy individual payments, and (ii) the binary values to form the structure of effective coalitions. The properties of the model are defined. The solution of the game is obtained using genetic algorithms. Experimental results for the MAS prototype from the domain of supply chains applying the proposed model with non-linear membership functions are discussed MH - Mexico|Distrito Federal MH - Russia PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000184854600026 L2 - SYSTEMS SO - Multi-Agent Systems and Applications Iii, Proceedings 2003 ;2691():268-280 9508 UI - 6682 AU - Sherman K AU - Ajayi T AU - Anang E AU - Cury P AU - az-de-Leon AJ AU - Freon MCMP AU - Hardman-Mountford NJ AU - Ibe CA AU - Koranteng KA AU - McGlade J AU - Nauen CECC AU - Pauly D AU - Scheren PAGM AU - Skjoldal HR AU - Tang QS AU - Zabi SG AD - Natl Marine Fisheries Serv, Narragansett Lab, Narragansett, RI 02882, USANIOMR, Nigerian Inst Oceanog, Lagos, NigeriaFisheries Res & Utilizat Branch, Tema, GhanaUniv Cape Town, Inst Rech Pour Dev IRD, ZA-7700 Rondebosch, South AfricaInst Nacl Ecol, Mexico City, DF, MexicoThe Lab, Plymouth PL1 2PB, Devon, EnglandUNIDO Reg Off, Abidjan 01, Cote IvoireMinist Food & Agr, Marine Fisheries Res Div, Tema, GhanaEuropean Environm Agcy, DK-1050 Copenhagen K, DenmarkUniv British Columbia, Fisheries Ctr, Vancouver, BC V6T 1Z4, CanadaInst Marine Res, N-5024 Bergen, NorwayYellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R ChinaIRD, Ctr Rech Oceanol, Abidjan, Cote IvoireSherman, K, Natl Marine Fisheries Serv, Narragansett Lab, 28 Tarzwell Dr, Narragansett, RI 02882 USA TI - Suitability of the large marine ecosystem concept MH - Canada MH - Cote Ivoire MH - Denmark MH - United Kingdom MH - Ghana MH - Mexico|Distrito Federal MH - Nigeria MH - Norway MH - Peoples R China MH - USA MH - South Africa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Letter AV - English IS - 0165-7836 UR - ISI:000187361800012 L2 - SHELF ECOSYSTEM; FOOD WEBS; ZOOPLANKTON; TRENDS; SEA SO - Fisheries Research 2003 ;64(2-3):197-204 9509 UI - 6603 AU - Shetty DV AU - Keksis A AU - Martin E AU - Ruangma A AU - Souliotis GA AU - Veselsky M AU - Winchester EM AU - Yennello SJ AU - Hagel K AU - Ma YG AU - Makeev A AU - Marie N AU - Murray M AU - Natowitz JB AU - Qin L AU - Smith P AU - Wada R AU - Wang J AU - Cinausero M AU - Fioretto E AU - Prete G AU - Fabris D AU - Lunardon M AU - Nebbia G AU - Rizzi V AU - Viesti G AU - Cibor J AU - Majka Z AU - Staszel P AU - Alfaro R AU - Martinez-Davalos A AU - Menchaca-Rocha A AU - El Masri Y AU - Keutgen T AD - Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843, USAIst Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, ItalyIst Nazl Fis Nucl, I-35131 Padua, ItalyUniv Padua, Dipartimento Fis, I-35131 Padua, ItalyInst Nucl Phys, PL-31342 Krakow, PolandJagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, PolandNatl Autonomous Univ Mexico, Inst Fis, Mexico City 04510, DF, MexicoUniv Catholique Louvain, FNRS, IPN, B-1348 Louvain, BelgiumShetty, DV, Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843, USA TI - Intermediate mass fragments and isospin dependence in Sn-124,Xe-124+Sn-124,Sn-112 reactions at 28 MeV/nucleon AB - Intermediate mass fragment (Z>2) emission in Sn-124,Xe-124+Sn-124,Sn-112 reactions at 28 MeV /nucleon were studied using neutron ion multidetector for reaction oriented dynamics, a 4pi charged particle detection system. A number of observables, such as isotopic yield distributions, energy spectra of light charged particles and intermediate mass fragments, isotopic and isobaric yield ratios, and average neutron to proton ratios are investigated. These observables show significant dependence on the isospin N/Z of the reacting system. It is observed that the formation of neutron-rich clusters are correlated with the excess neutrons in the composite system and depends on the temperature of the emitting source. The origin of light particles and fragments was studied through observations of rapidity distribution as a function of collision violence. With increasing centrality, the heavier He-6 isotope is found to be emitted closer to the midrapidity region than the lighter He-3 isotope. The emission of heavy fragments from the midrapidity region becomes increasingly favorable for fragments with higher charge Z . The results suggest that the midrapidity region is not only neutron rich but also a rich source of heavy fragment (cluster) formation MH - Belgium MH - Italy MH - Mexico|Distrito Federal MH - Poland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000187578300043 L2 - HEAVY-ION COLLISIONS; DEGREE-OF-FREEDOM; NUCLEAR COLLISIONS; ENERGY; EQUILIBRATION; MATTER; EQUATION; DECAY; NI-58 SO - Physical Review C 2003 ;68(5): 9510 UI - 8503 AU - Shi P AU - Boukas EK AU - Nguang SK AU - Gu XP AD - Def Sci & Technol Org, Weapons Syst Div, Edinburgh, SA 5111, AustraliaEcole Polytech, Dept Mech Engn, Montreal, PQ H3C 3A7, CanadaUniv Auckland, Dept Elect & Elect Engn, Auckland 1, New ZealandInst Politecn Nacl, CINVESTAV, Dept Math, Mexico City 07000, DF, MexicoShi, P, Def Sci & Technol Org, Weapons Syst Div, POB 1500, Edinburgh, SA 5111, Australia TI - Robust disturbance attenuation for discrete-time active fault tolerant control systems with uncertainties AB - The problems of stochastic stability and stochastic disturbance attenuation for a class of linear discrete-time systems are considered in this paper. The system under study is a state space model possessing two Markovian jump parameters: one is failure process and another is failure detection and isolation scheme. A controller is designed to guarantee the stochastic stability and a disturbance attenuation level. Robustness problems for the above system with norm-bounded parameter uncertainties are also investigated. It is shown that the uncertain system can be robustly stochastically stabilized and have a robust disturbance attenuation level for all admissible perturbations if a set of coupled Riccati inequalities has solutions. A numerical example is given to show the potential of the proposed technique. Copyright (C) 2003 John Wiley Sons, Ltd MH - Australia MH - Canada MH - Mexico|Distrito Federal MH - New Zealand PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 10 U4 - Automation & Control Systems;Operations Research & Management Science;Mathematics, Applied U5 - J;Article AV - English IS - 0143-2087 UR - ISI:000182732500003 L2 - fault tolerant control;Markovian jump system;parameter uncertainty;disturbance attenuation;robust and stochastic control;H-INFINITY-CONTROL; MARKOVIAN JUMPING PARAMETERS; LINEAR-QUADRATIC CONTROL; GUARANTEED COST CONTROL; STOCHASTIC STABILITY; OUTPUT-FEEDBACK; STABILIZATION; STATE; MAINTENANCE SO - Optimal Control Applications & Methods 2003 ;24(2):85-101 9511 UI - 7611 AU - Shternin PS AU - Gnedin YN AU - Silant'ev NA AD - St Petersburg State Polytech Univ, St Petersburg, RussiaRussian Acad Sci, Main Astron Observ, St Petersburg, RussiaInst Nacl Astrofis Opt & Elect, Puebla, MexicoShternin, PS, St Petersburg State Polytech Univ, St Petersburg, Russia TI - Solution of the Milne problem for a magnetized atmosphere AB - The Milne problem is solved numerically for a magnetized semi-infinite electron atmosphere in the case where the magnetic field is directed along the normal to the medium. The calculated angular distribution, degree of linear polarization, and positional angle of inclination of the plane of polarization of the emerging radiation are given in tables for a number of values of the Faraday rotation parameter and for degrees of intrinsic optical absorption, q = 0, 0.2, and 0.4. It is assumed that the magnetic field B less than or equal to 10(6) G, so that scattering in the optical range is purely Thomson scattering MH - Mexico|Puebla MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0571-7256 UR - ISI:000185028100008 L2 - radiative transfer : atmospheres;RADIATIVE-TRANSFER; FARADAY-ROTATION; ACCRETION DISCS; POLARIZATION SO - Astrophysics 2003 ;46(3):350-360 9512 UI - 8826 AU - Shumilin EN AU - Mironenko MV AU - Ryzhenko BN AU - Munoz MG AD - Ctr Interdisciplinario Ciencias Marinas, La Paz 23096, Baja California, MexicoRussian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Moscow 119991, RussiaShumilin, EN, Ctr Interdisciplinario Ciencias Marinas, Av IPN S-N,Apdo Postal 592, La Paz 23096, Baja California, Mexico TI - Speciation of trace elements in brines from the concentration ponds of Exportadora de Sal, Guerrero Negro, Baja California Sur, Mexico AB - Speciation of several trace elements upon evaporative preconcentration of seawater has been studied. The elements have been grouped with respect to their concentration trends as a function of increasing brine mineralization: (1) copper, uranium, and mercury show an almost monotonic increase with growth in salinity; (2) aluminum, iron, and manganese (to a lesser extent, chromium, nickel, and cobalt) show a nonconservative behavior; (3) lead, zinc, and silver show a well-defined nonconservative behavior; and (4) cadmium almost completely leaves the aqueous phase when the salinity increases. The speciation of the specified elements in one solution of various mineralization has been found from thermodynamic simulation MH - Mexico|Baja California MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-7029 UR - ISI:000181894000007 L2 - SILICA-IMMOBILIZED 8-HYDROXYQUINOLINE; MINOR ELEMENTS; SEAWATER; SEDIMENTS; MODEL; WATER SO - Geochemistry International 2003 ;41(3):295-304 9513 UI - 9303 AU - Shustin E AU - Fridman E AU - Fridman L AD - Tel Aviv Univ, Sch Math Sci, IL-69978 Tel Aviv, IsraelTel Aviv Univ, Dept Elect Engn & Syst, IL-69978 Tel Aviv, IsraelChihuahua Inst Technol, Div Postgrad & Invest, Chihuahua 31160, Chi, MexicoShustin, E, Tel Aviv Univ, Sch Math Sci, IL-69978 Tel Aviv, Israel TI - Oscillations in a second-order discontinuous system with delay AB - We consider the equation alphax" (t) = -x'(t) + F(x(t), t) - sign x(t - h), alpha = const > 0, h = const > 0, which is a model for a scalar system with a discontinuous negative delayed feedback, and study the dynamics of oscillations with emphasis on the existence, frequency and stability of periodic oscillations. Our main conclusion is that, in the autonomous case F(x, t) = F(x), for \F(x)\ < 1, there are periodic solutions with different frequencies of oscillations, though only slowly-oscillating solutions are (orbitally) stable. Under extra conditions we show the uniqueness of a periodic slowly-oscillating solution. We also give a criterion for the existence of bounded oscillations in the case of unbounded function F(x, t). Our approach consists basically in reducing the problem to the study of dynamics of some discrete scalar system MH - Israel MH - Mexico|Chihuahua PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000180665700007 L2 - delay-differential equation;periodic solutions;orbital stability;DIFFERENTIAL EQUATIONS; STEADY MODES SO - Discrete and Continuous Dynamical Systems 2003 ;9(2):339-358 9514 UI - 7135 AU - Sibgatullin IN AU - Gertsenstein SJ AU - Sibgatullin NR AD - Moscow MV Lomonosov State Univ, Inst Mech, Moscow 119192, RussiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoMoscow MV Lomonosov State Univ, Fac Mech & Math, Moscow 119899, RussiaSibgatullin, IN, Moscow MV Lomonosov State Univ, Inst Mech, Moscow 119192, Russia TI - Some properties of two-dimensional stochastic regimes of double-diffusive convection in plane layer AB - The existence of a two-dimensional attracting manifold is established for trajectories emanating from the vicinity of static solution. The structure of this manifold is studied with the help of succession map of points in intersection of trajectories with some coordinate plane. The structure of the attracting manifold varies depending on Rayleigh numbers of heat and salinity. With growth of Rayleigh numbers of heat and salinity the structure of one-dimensional curve becomes more irregular and sophisticated. The convergence of Bubnov-Galerkin approximation with a large number of basic functions was demonstrated in norms of kinetic energy, dissipation function, and directly by norm evaluation of the residual (noncompensated terms in substitution of Bubnov-Galerkin approximation to the initial double-diffusive convection system). (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000186276900007 SO - Chaos 2003 ;13(4):1231-1241 9515 UI - 6585 AU - Sibgatullin NR AU - Garcia AA AU - Manko VS AD - Moscow MV Lomonosov State Univ, Moscow 119992, RussiaIPN, CINVESTAV, Ctr Modern Res, Mexico City 07738, DF, MexicoSibgatullin, NR, Moscow MV Lomonosov State Univ, Vorobevy Gory, Moscow 119992, Russia TI - Rotation curves and mass distributions in flat self-gravitating disks AB - We have developed a new approach that allows the surface-density distribution in flat finite-radius galactic disk models to be reconstructed from an arbitrary smooth angular-velocity distribution. Upper limits for the disk mass and radius are shown to exist for a wide class of rotation Curves analytically extended to the unseen part of the disk. (C) 2003 MAIK "Nauka/Inlerperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000187622400003 L2 - rotation curves;galactic disks;surface density;SPIRAL GALAXIES; MATTER; DARK SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2003 ;29(12):825-830 9516 UI - 6778 AU - Sibgatullin NR AU - Garcia AA AU - Manko VS AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMoscow MV Lomonosov State Univ, Dept Hydrodynam, Moscow 119899, RussiaSibgatullin, NR, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - General relativistic interaction of massless fields in cylindrical waves AB - In this paper the problem of finding exact solutions of the combined system of the Einstein-Maxwell-Weyl equations for cylindrical waves is reduced to the solution of two complete singular integral equations in the complex plane of the auxiliary analytical parameter. In the case of the nonsingular symmetry axis the problem further simplifies and requires solving the only integral equation, the expressions for the Ernst potentials on the symmetry axis then defining the group transformations of internal symmetries during the solution generation process. A large class of exact solutions for neutrino electrovacuum is obtained, and the Cauchy problem related to some particular initial data is considered MH - Mexico|Distrito Federal MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000187004600054 L2 - EINSTEIN-MAXWELL-EQUATIONS; ROTATING NEUTRON-STAR; KINNERSLEY-CHITRE TRANSFORMATIONS; EXTENDED MULTISOLITON SOLUTIONS; MAGNETIC DIPOLE-MOMENT; DISK ACCRETION; GRAVITATIONAL-FIELD; ENERGY-RELEASE; CONSERVATION; SYMMETRY SO - Physical Review D 2003 ;68(10): 9517 UI - 9123 AU - Sibgatullin NR AU - Garcia A AU - Manko VS AD - CINVESTAV, IPN, Ctr Modern Res, Natl Polytech Inst, Mexico City 14000, DF, MexicoMoscow MV Lomonosov State Univ, Moscow 119899, RussiaSibgatullin, NR, CINVESTAV, IPN, Ctr Modern Res, Natl Polytech Inst, Mexico City 14000, DF, Mexico TI - Density distribution in massive galactic disks with a central black hole AB - We developed an efficient method for determining the surface-density distribution in a self-gravitating disk with an isolated central point mass from a specified angular-velocity distribution in the disk. An upper limit for the galactic-disk mass is shown to exist at a given black-hole mass. This limit significantly depends on the choice of rotation curves. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7737 UR - ISI:000181214300002 L2 - galactic disks;rotation curve;black holes;SPIRAL GALAXIES; ROTATION CURVES; DARK; MATTER SO - Astronomy Letters-A Journal of Astronomy and Space Astrophysics 2003 ;29(2):70-76 9518 UI - 8032 AU - Sideris EB AU - Macuil B AU - Poursanov M AU - Toumanides S AU - Moulopoulos SD AD - Athenian Inst Pediat Cardiol, Athens, GreecePrimero Octubre Hosp, Mexico City, DF, Mexico TI - Transcatheter patch occlusion of perimembranous ventricular septal defects MH - Greece MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0735-1097 UR - ISI:000181669502047 SO - Journal of the American College of Cardiology 2003 ;41(6):473A-473A 9519 UI - 7616 AU - Sierra-Santoyo A AU - Barton HA AU - Hughes MF AD - US EPA, ETD, NHEERL, ORD, Res Triangle Pk, NC 27711, USAIPN, CINVESTAV, Toxicol Sect, Mexico City 07738, DF, Mexico TI - HPLC analysis of vinclozolin and its metabolites in serum MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Toxicology U5 - J;Meeting Abstract AV - English IS - 1096-6080 UR - ISI:000181518500444 SO - Toxicological Sciences 2003 ;72():91-91 9520 UI - 8634 AU - Sierra G AU - McNaught J AD - Natl Autonomous Univ Mexico, Engn Inst, Mexico City 04510, DF, MexicoUMIST, Dept Comp, Manchester M60 1QD, Lancs, EnglandSierra, G, Natl Autonomous Univ Mexico, Engn Inst, Ciudad Univ,Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - Natural language system for terminological information retrieval AB - The purpose of any information retrieval (IR) system in response to a query is to provide the user with the data that satisfy his information need. In order to design a user friendly onomasiological system (one to find a word from a description of a concept), we firstly must consider the searching process, i.e. query and matching. This paper is organised in two broad parts. The first part situates the general methodology for IR in relation to the particular problem of onomasiological searching. The second part discusses an experiment in onomasiological searching carried out. on dictionaries to validate design principles for an onomasiological search system MH - United Kingdom MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000182492300058 SO - Computational Linguistics and Intelligent Text Processing, Proceedings 2003 ;2588():541-552 9521 UI - 6269 AU - Sierra JA AU - Ramos FJM AU - Montanez JL AU - Gutierrez R AU - Chung RT AU - Celis AJ AU - Vivas C AU - Ruelas S AU - Navarro BG AU - Navarro AMC AD - IMSS, Ctr Med Nacl Occidente, Collaborat Grp Study Hepatitis Kidney Dis, Guadalajara, Jalisco, MexicoMassachusetts Gen Hosp, Boston, MA 02114, USAIMSS, Ctr Med Nacl Occidente, Guadalajara, Jalisco, Mexico TI - Risk factors associated with posttransplantation diabetes mellitus in kidney recipients MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219103046 SO - Journal of the American Society of Nephrology 2003 ;14():658A-658A 9522 UI - 6909 AU - Sigalotti LD AU - Klapp J AU - Sira E AU - Melean Y AU - Hasmy A AD - Inst Venezolano Invest Cient, Ctr Fis, Caracas 1020A, VenezuelaININ, Mexico City, DF, MexicoSigalotti, LD, Inst Venezolano Invest Cient, Ctr Fis, Km 11,Carretera Panamericana,Apdo 21827, Caracas 1020A, Venezuela TI - SPH simulations of time-dependent Poiseuille flow at low Reynolds numbers AB - A working Smoothed Particle Hydrodynamics (SPH) formalism for solving the equations of motion of a viscous fluid is presented. The method is based on a standard symmetrized SPH expression for the viscous forces, which involves only first-order derivatives of the kernel through a direct evaluation of the viscous stress tensor. Therefore, the interpolation can be performed using low-order kernels of compact support without compromising the accuracy and stability of the results. In principle, the scheme is suitable for treating compressible fluids with arbitrary shear and bulk viscosities. Here, we demonstrate that when it is combined with the pressure-gradient correction proposed by Morris et.al., the method is also suitable for solving the Navier-Stokes equations for incompressible flows without any further assumptions. Simulations using the method show close agreement with the analytic series solutions for plane Poiseuille and Hagen-Poiseuille flows at very low Reynolds numbers. At least for these specific tests, the results obtained are essentially independent of employing either a cubic or a quintic spline kernel. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Venezuela PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Interdisciplinary Applications;Physics, Mathematical U5 - J;Article AV - English IS - 0021-9991 UR - ISI:000186667400012 L2 - conservation laws;Navier-Stokes equations;compressible and incompressible viscous fluids;numerical methods;stability and convergence of numerical methods;SMOOTHED PARTICLE HYDRODYNAMICS; APPLIED MECHANICS; VISCOSITY SO - Journal of Computational Physics 2003 ;191(2):622-638 9523 UI - 8143 AU - Sil'chenko OK AU - Moiseev AV AU - Afanasiev VL AU - Chavushyan VH AU - Valdes JR AD - Sternberg Astron Inst, Moscow 119992, RussiaIsaac Newton Inst Chile, Moscow Branch, Moscow, RussiaSpecial Astrophys Observ, Nizhnii Arkhyz 369167, RussiaInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoSil'chenko, OK, Sternberg Astron Inst, Moscow 119992, Russia TI - The Leo I cloud: Secular nuclear evolution of NGC 3379, NGC 3384, and NGC 3368? AB - The central regions of the three brightest members of the Leo I galaxy group-NGC 3368, NGC 3379, and NGC 3384-are investigated by means of two-dimensional spectroscopy. In all three galaxies we have found separate circumnuclear stellar and gaseous subsystems-more probably, disks-whose spatial orientations and spins are connected to the spatial orientation of the supergiant intergalactic H I ring reported previously by Schneider et al. and Schneider. In NGC 3368 the global gaseous disk seems also to be inclined to the symmetry plane of the stellar body, being probably of external origin. Although the rather young mean stellar age and spatial orientations of the circumnuclear disks in NGC 3379, NGC 3384, and NGC 3368 could imply their recent formation from material of the intergalactic H I cloud, the timescale of these secondary formation events, on the order of 3 Gyr, does not support the collision scenario of Rood & Williams but is rather in line with the ideas of Schneider regarding tidal interactions of the galaxies with the H I cloud on timescales of the intergroup orbital motions MH - Mexico|Puebla MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183617400013 L2 - galaxies : evolution;galaxies : individual (NGC 3368;NGC 3379, NGC 3384);galaxies : nuclei;galaxies : structure;EARLY-TYPE GALAXIES; INTEGRAL-FIELD SPECTROGRAPH; OLD STELLAR POPULATIONS; SPIRAL GALAXIES; LENTICULAR GALAXIES; INTERGALACTIC RING; FORMATION HISTORY; NEUTRAL HYDROGEN; VELOCITY-FIELDS; DISTINCT NUCLEI SO - Astrophysical Journal 2003 ;591(1):185-203 9524 UI - 8221 AU - Silich S AU - Tenorio-Tagle G AU - Munoz-Tunon C AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev 127, UkraineInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainSilich, S, Inst Nacl Astrofis Opt & Elect, AP 51, Puebla 72000, Mexico TI - On the rapidly cooling interior of supergalactic winds AB - Here we present the steady-state numerical solution and two-dimensional hydrodynamic calculations of supergalactic winds, taking into consideration strong radiative cooling. The two possible outcomes: quasi-adiabatic and strongly radiative flows, are thoroughly discussed, together with their implications on the appearance of supergalactic winds in both the X-ray and visible line regimes MH - Mexico|Puebla MH - Spain MH - Ukraine PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183459200015 L2 - galaxies : ISM;galaxies : starburst;methods : numerical;DWARF GALAXIES; STARBURSTS; REGIONS; SAMPLE SO - Astrophysical Journal 2003 ;590(2):791-796 9525 UI - 8426 AU - Silva-Gomez AB AU - Bermudez M AU - Quirion R AU - Srivastava LK AU - Picazo O AU - Flores G AD - Univ Autonoma Puebla, Lab Neuropsiquiatria, Inst Fisiol, Puebla 72570, MexicoIPN, Escuela Super Med, Mexico City, DF, MexicoMcGill Univ, Dept Psychiat, Douglas Hosp, Res Ctr, Montreal, PQ, CanadaFlores, G, Univ Autonoma Puebla, Lab Neuropsiquiatria, Inst Fisiol, 14 Sur 6301, Puebla 72570, Mexico TI - Comparative behavioral changes between male and female postpubertal rats following neonatal excitotoxic lesions of the ventral hippocampus AB - Neonatal ventral hippocampal (nVH) lesioned male rat has been used as a model to test the hypothesis that early neurodevelopmental abnormalities lead to behavioral changes putatively linked to schizophrenia. There are significant gender differences in schizophrenia with male and female individuals differing in the age of onset, course and outcome of the disorder. In order to assess whether the behavioral effects of nVH lesions extend to or are different in female rats, we investigated spontaneous locomotion, grooming, social interactions and spatial memory in male and female rats post-pubertally at postnatal day (P) 56 following bilateral ibotenic acid of the ventral hippocampus at P7. The spontaneous locomotor activity in a novel environment of both male and female nVH lesioned rats was significantly enhanced compared to their respective sham-operated controls. In tests of social interactions, the number of encounters was significantly decreased in female lesioned rats, whereas the male nVH lesioned. rats showed a significantly reduced duration of active social interactions. Furthermore, Morris water maze test showed a deficit of spatial learning/memory in only male lesioned rats with significant decrease in the latency to find hidden platform. These results suggest that while nVH lesions affect post-pubertal behavior in both sexes of rats, the males appear to be affected to a greater extent than the females underscoring the influence of sex differences in the development of behaviors in the nVH lesioned animals. (C) 2003 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000183025100015 L2 - neonatal ventral hippocampus lesion;female rat;male rat;grooming behavior;memory and learning;social behavior;ELICITED ROTATIONAL BEHAVIOR; ESTROUS-CYCLE VARIATIONS; DOPAMINE UPTAKE SITES; SEX-DIFFERENCES; STRIATAL DOPAMINE; GONADAL-HORMONES; OVARIECTOMIZED RATS; GENDER DIFFERENCES; SOCIAL-INTERACTION; SCHIZOPHRENIC-PATIENTS SO - Brain Research 2003 ;973(2):285-292 9526 UI - 6693 AU - Silva-Pereyra J AU - Rivera-Gaxiola M AU - Aubert E AU - Bosch J AU - Galan L AU - Salazar A AD - Univ Washington, Ctr Mind Brain & Learning, Fisheries Ctr 358, Seattle, WA 98195, USACtr Neurociencias, Havana, CubaUniv Nacl Autonoma Mexico, Inst Neurobiol, Juriquilla, Queretaro, MexicoSilva-Pereyra, J, Univ Washington, Ctr Mind Brain & Learning, Fisheries Ctr 358, Box 357988, Seattle, WA 98195 USA TI - N400 during lexical decision tasks: a current source localization study AB - Objective: Our primary aim in the present study was to establish the anatomic and psychophysiological correlates of automatic and controlled semantic priming. Methods: Current sources were calculated on N400 component data from a previous study on lexical decision tasks [Clin Neurophysiol 1999; 110:813] using the variable resolution electromagnetic tomography method (VARETA). In this study, two experiments were carried out, one using directly related pairs and the other one using mediated related pairs. Each experiment consisted of 3 tasks that required different levels of contribution from controlled processes. Results: Average source localization images showed the brain structures involved in lexical decision tasks. The automatic component of the N400 effect was related to activation of occipitotemporal and parahippocampal gyri and anterior temporal lobes bilaterally. The expectancy strategy was related to activation of the right posterior temporal and right frontal areas. The postlexical strategy was associated with activation of right frontal, anterior cingulate and bilateral superior parietal areas. Conclusions: The findings indicated that the current sources of the N400 varied according to the relative contributions of automatic and controlled mechanisms. Moreover, the sources of the N400 effect depended on the type of strategy used. (C) 2003 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved MH - Cuba MH - Mexico|Queretaro MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology;Neurosciences U5 - J;Review AV - English IS - 1388-2457 UR - ISI:000187401500027 L2 - N400;source localization;strategy;VARETA;lexical decision task;semantic priming;semantic processing;EVENT-RELATED POTENTIALS; MEDIAL TEMPORAL-LOBE; POSITRON-EMISSION TOMOGRAPHY; RESOLUTION ELECTROMAGNETIC TOMOGRAPHY; ANTERIOR CINGULATE CORTEX; ABNORMAL EEG ACTIVITY; CEREBRAL-BLOOD-FLOW; RIGHT-HEMISPHERE; SPREADING ACTIVATION; RECOGNITION MEMORY SO - Clinical Neurophysiology 2003 ;114(12):2469-2486 9527 UI - 7300 AU - Silva-Pereyra J AU - Rivera-Gaxiola M AU - Fernandez T AU - az-Comas L AU - Harmony T AU - Fernandez-Bouzas A AU - Rodriguez M AU - Bernal J AU - Marosi E AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, UAQ, Queretaro, MexicoUniv Washington, Ctr Mind Brain & Learning, Seattle, WA 98195, USACtr Neurosci, Havana, CubaUniv Nacl Autonoma Mexico, Neurociencias ENEP Iztacala, Mexico City 04510, DF, MexicoSilva-Pereyra, J, Univ Nacl Autonoma Mexico, Inst Neurobiol, UAQ, Queretaro, Mexico TI - Are poor readers semantically challenged? An event-related brain potential assessment AB - This study explores visual event-related potentials components in a group of poor readers (PRs) and control children who carried out figure and word categorization tasks. In both tasks, every child had to categorize between animal and non-animal stimuli in an odd-ball GO-GO paradigm. During the word categorization task, PRs presented longer reaction times, a poorer performance, longer and larger P2 amplitudes, and smaller amplitudes and longer P300 latencies than controls. There were no differences in the N400 component between groups. These results suggest that semantic processing underachievement in PRs may not be a semantic deficit per se, but the late reflection of an early word codification problem, deficient use of attentional resources and lack of target identification during reading. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Psychology, Biological;Neurosciences;Physiology;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 0167-8760 UR - ISI:000185820800002 L2 - poor readers, semantic processing, N400, P300, P2;categorization tasks;event-related potentials, reading disabled children;READING-DISABLED-CHILDREN; WORKING-MEMORY; LEXICAL DECISION; WORDS; TASK; P300; ATTENTION; REFLECT; SKILLS; N400 SO - International Journal of Psychophysiology 2003 ;49(3):187-199 9528 UI - 9143 AU - Simanjuntak HP AU - Pereyra P AD - Univ Indonesia, FMIPA, Dept Phys, Depok 16424, Jawa Barat, IndonesiaUAM Azcapotzalco, Dept Ciencias Basicas, Mexico City 02200, DF, MexicoAbdus Salam Inst Ctr Theoret Phys, Trieste, ItalySimanjuntak, HP, Univ Indonesia, FMIPA, Dept Phys, Depok 16424, Jawa Barat, Indonesia TI - Evolution and tunneling time of electron wave packets through a superlattice AB - We present a formalism to study the evolution of a wave packet inside and outside a scattering superlattice. Time series of specific Gaussian packets, centered at an arbitrary energy E-o, exhibit interesting back-scattering, trapping, and transmission effects. These effects depend on whether the energy E-o is in a gap, coincides with a resonance, or is an arbitrary point in a band of the superlattice. The time evolution depends strongly on the transmission coefficient and on the superlattice tunneling time. We show that because of the reduced wave-packet distortion and the high intensity difference between the back-scattered and the transmitted wave, for E-o in a gap, it is convenient to look at the back-scattered wave packet to study the superlattice tunneling time MH - Indonesia MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000181016200033 L2 - TRAVERSAL TIME; BARRIER SO - Physical Review B 2003 ;67(4): 9529 UI - 7169 AU - Simard B AU - Rayner DM AU - Benichou E AU - Mireles N AU - Tenorio FJ AU - Martinez A AD - Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, CanadaUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoSimard, B, Natl Res Council Canada, Steacie Inst Mol Sci, 100 Sussex Dr, Ottawa, ON K1A 0R6, Canada TI - Solvation of yttrium with ammonia: An experimental and theoretical study AB - The reactivity of the yttrium atom toward ammonia at room temperature has been investigated in a fast-flow reactor. The first step in the reaction is the rapid formation of yttrium imide (YNH) through the oxidative addition of the N-H bond of ammonia and the elimination of molecular hydrogen. The reaction continues with the solvation of yttrium imide with up to three molecules of ammonia. An equilibrium is established between the YNH(NH3)(2) and YNH(NH3)(3) species. The binding energy of NH3 in the YNH(NH3)(3) complex is found to be 19.7 +/- 0.3 kcal/mol. Reaction rates have been determined for the solvation processes. Density functional calculations indicate that up to four ammonia molecules can bind to YNH at 0 K. The calculated D, is highest for the YNH-NH3 complex and decreases abruptly following the addition of the third ammonia molecule. The calculated binding energy of the YNH(NH3)(3) complex is 12 kcal/mol, in fair agreement with experiment. The YNH(NH3)(4) complex is too weakly bound to be observed in our experiment. The structures of the complexes have been determined through full geometry optimizations. A molecular orbital analysis indicates that ammonia molecules are ligated to the positive end (Y) of the large dipole of YNH through dipole-dipole interactions and dative bond formation. The singly occupied sp hybrid on Y forces the ammonia molecules to bind side-on to Y MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000186156000007 L2 - EFFECTIVE CORE POTENTIALS; RESOLUTION MOLECULAR-BEAM; TRANSITION-METAL ATOMS; AB-INITIO; CLUSTERS; ENERGY; IMIDE SO - Journal of Physical Chemistry A 2003 ;107(43):9099-9104 9530 UI - 8838 AU - Simental JA AU - Sanchez-Saavedra MP AD - CICESE, Dept Acuicultura, Ensenada 22860, Baja California, MexicoSanchez-Saavedra, MP, POB 434844, San Diego, CA 92143, USA TI - The effect of agricultural fertilizer on growth rate of benthic diatoms AB - The aim of this work was to consider a non-conventional medium for benthic diatoms culture, formulated with liquid agricultural fertilizers and with the 'f/2' medium used as control. Three strains of benthic marine diatoms (Nitzschia laevis, Nitzschia thermalis ar. minor and Navicula incerta) were grown with these two media. in batch cultures in 18-1 plastic containers. There were no significant differences in mean cell concentration and growth rate between three diatoms raised with agricultural fertilizers compared to the standard 'f/2' medium. The cost for non-conventional culture media is less than 1/8 the cost of the 'f/2' medium. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Agricultural Engineering;Fisheries U5 - J;Article AV - English IS - 0144-8609 UR - ISI:000181918400002 L2 - benthic diatoms;aaricultural fertilizers;growth rate;MARINE; NITROGEN; ALGAE SO - Aquacultural Engineering 2003 ;27(4):265-272 9531 UI - 8846 AU - Simis A AU - Villarreal RH AD - Univ Fed Pernambuco, Dept Matemat, BR-50740540 Recife, PE, BrazilIPN, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoSimis, A, Univ Fed Pernambuco, Dept Matemat, BR-50740540 Recife, PE, Brazil TI - Constraints for the normality of monomial subrings and birationality AB - Let k be a field and let F subset of k[x(1),... x(n)] be a finite set of monomials whose exponents lie on a positive hyperplane. We give necessary conditions for the normality of both the Rees algebra R[Ft] and the subring k[F]. If the monomials in F have the same degree, one of the consequences is a criterion for the k-rational map F : P-k(n-1) --> P-k(m-1) defined by F to be birational onto its image MH - Brazil MH - Mexico|Distrito Federal PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000181708300010 L2 - birational map;minors;normal ideal;Rees algebras SO - Proceedings of the American Mathematical Society 2003 ;131(7):2043-2048 9532 UI - 6958 AU - Simon JA AU - Cabiedes J AU - Ghillani P AU - Musset L AU - Piette JC AU - Amoura Z AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHosp Pitie Salpetriere, Paris, France TI - Anti-chromatin antibodies and nephropathy in patients with systemic lupus erythematosus. Case control study MH - France MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801513 SO - Arthritis and Rheumatism 2003 ;48(9):S571-S571 9533 UI - 7402 AU - Singer H AU - Moreno G AU - Illana C AU - Lizarraga M AD - Univ Alcala de Henares, Dept Biol Vegetal Bot, Alcala De Henares 28871, Madrid, SpainUniv Autonoma Ciudad Juarez, Inst Ciencias Biomed, Dept Ciencias Basicas, Ciudad Juarez 32300, Chihuahua, MexicoSinger, H, Univ Alcala de Henares, Dept Biol Vegetal Bot, Alcala De Henares 28871, Madrid, Spain TI - Trichia synspora, a synonym of Trichia varia AB - The type of Trichia synspora has been found and reexamined applying electron microscopy techniques. The morphology of the sporocarps, spore ornamentation and capillitium are similar to Trichia varia, thus synonymy is proposed MH - Mexico|Chihuahua MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 4 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000185523700025 L2 - myxomycetes;SEM;taxonomy;Trichia;Trichiales SO - Mycotaxon 2003 ;87():243-248 9534 UI - 8834 AU - Singh SK AU - Bansal BK AU - Bhattacharya SN AU - Pacheco JF AU - Dattatrayam RS AU - Ordaz M AU - Suresh G AU - Kamal AU - Hough SE AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoGovt India, Dept Sci & Technol, New Delhi 110016, IndiaIndian Meteorol Dept, New Delhi 110003, IndiaNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoWadia Inst Himalayan Geol, Dehra Dun 248001, Uttar Pradesh, IndiaUS Geol Survey, Pasadena, CA 91106, USASingh, SK, Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Estimation of ground motion for Bhuj (26 January 2001; M-w 7.6) and for future earthquakes in India AB - Only five moderate and large earthquakes (M-w greater than or equal to5.7) in India-three in the Indian shield region and two in the Himalayan arc region-have given rise to multiple strong ground-motion recordings. Near-source data are available for only two of these events. The Bhuj earthquake (M-w 7.6), which occurred in the shield region, gave rise to useful recordings at distances exceeding 550 km. Because of the scarcity of the data, we use the stochastic method to estimate ground motions. We assume that (1) S waves dominate at R < 100 km and Lg waves at R ? 100 km, (2) Q = 508f(0.48) is valid for the Indian shield as well as the Himalayan arc region, (3) the effective duration is given by fc(-1) + 0.05R, where fc is the corner frequency, and R is the hypocentral distance in kilometer, and (4) the acceleration spectra are sharply cut off beyond 35 Hz. We use two finite-source stochastic models. One is an approximate model that reduces to the omega(2)-source model at distances greater that about twice the source dimension. This model has the advantage that the ground motion is controlled by the familiar stress parameter, Deltasigma. In the other finite-source model, which is more reliable for near-source ground-motion estimation, the high-frequency radiation is controlled by the strength factor, sfact, a quantity that is physically related to the maximum slip rate on the fault. We estimate Deltasigma needed to fit the observed Amax and Vmax data of each earthquake (which are mostly in the far field). The corresponding sfact is obtained by requiring that the predicted curves from the two models match each other in the far field up to a distance of about 500 km. The results show: (1) The Deltasigma that explains Amax data for shield events may be a function of depth, increasing from similar to50 bars at 10 km to similar to400 bars at 36 km. The corresponding sfact values range from 1.0-2.0. The 06 values for the two Himalayan arc events are 75 and 150 bars (sfact = 1.0 and 1.4). (2) The Deltasigma required to explain Vmax data is, roughly, half the corresponding value for Amax, while the same sfact explains both sets of data. (3) The available far-field Amax and Vmax data for the Bhuj mainshock are well explained by Deltasigma = 200 and 100 bars, respectively, or, equivalently, by sfact = 1.4. The predicted Amax and Vmax in the epicentral region of this earthquake are 0.80 to 0.95 g and 40 to 55 cm/sec, respectively MH - India MH - Mexico|Distrito Federal MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 18 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000181971700024 L2 - EASTERN NORTH-AMERICA; SOURCE PARAMETERS; MODEL; FAULT; PREDICTION; UTTARKASHI; AMPLITUDE; SPECTRUM; JABALPUR; HIMALAYA SO - Bulletin of the Seismological Society of America 2003 ;93(1):353-370 9535 UI - 10003 AU - Sira-Ramirez H AU - Rouchon P AD - IPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, MexicoEcole Mines Paris, Ctr Automat & Syst, F-77305 Fontainebleau, FranceSira-Ramirez, H, IPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Ave IPN,2508,Col San Pedro Zacatenco,AP 14740, Mexico City 07300, DF, Mexico TI - Exact delayed reconstructors in nonlinear discrete-time systems control AB - In this article we show that the n-dimensional state of an observable discrete-time nonlinear SISO system can always be exactly synthesized by means of a "structural reconstructor" which only requires knowledge of a finite number of delayed inputs and delayed outputs. This fact, when combined with the difference flatness of the system, results in an effective systematic feedback control scheme which avoids the need for traditional asymptotic state observers MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Computer Science, Information Systems U5 - S;Article AV - English IS - 0170-8643 UR - ISI:000178713000028 SO - Nonlinear and Adaptive Control, Ncn4 2001 2003 ;281():351-360 9536 UI - 5623 AU - Slater JA AU - Brailovsky H AD - Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USANatl Autonomous Univ Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoSlater, JA, Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269 USA TI - The rectification of the type species of Acolhua distant with the description of a new species (Heteroptera : Rhyparochromidae) AB - The type species of Acolhua is discussed. The specimens considered to represent the type species Acolhua championi Distant by Slater & Brailovsky (1986) are shown to represent a previously undescribed species described as A. barrerai new species. The actual type species of Acolhua championi (Distant) is redescribed from Mexico MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: NEW YORK ENTOMOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0028-7199 UR - ISI:000221071200005 L2 - Antillocorini;Acolhua;Mexico;type species SO - Journal of the New York Entomological Society 2003 ;111(4):207-210 9537 UI - 8350 AU - Slavin AN AU - Buttner O AU - Bauer M AU - Demokritov SO AU - Hillebrands B AU - Kostylev MP AU - Kalinikos BA AU - Grimalsky VV AU - Rapoport Y AD - Oakland Univ, Dept Phys, Rochester, MI 48309, USAUniv Kaiserslautern, Fachbereich Phys, D-67663 Kaiserslautern, GermanySt Petersburg Electrotech Univ, St Petersburg 197376, RussiaNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoKiev TG Shevchenko State Univ, UA-252601 Kiev, UkraineSlavin, AN, Oakland Univ, Dept Phys, Rochester, MI 48309, USA TI - Collision properties of quasi-one-dimensional spin wave solitons and two-dimensional spin wave bullets AB - Collision properties of quasi-one-dimensional spin wave envelope solitons propagating in narrow ferrite film waveguides and of two-dimensional self-focused spin wave packets (spin wave bullets) propagating in wide ferrite film samples are studied both experimentally and numerically. The experiments, performed by means of a space- and time-resolved Brillouin light scattering technique, have shown that quasi-one-dimensional spin wave envelope solitons retain their shapes after collisions, while two-dimensional spin wave bullets are destroyed in collisions. The experiments have also shown that the introduction of a fixed phase shift between the colliding envelope solitons leads to a qualitative change in their interaction at the collision point. Numerical modeling of head-on collisions of nonlinear spin wave packets based on two different approaches provides a good qualitative description of the observed collision phenomena. (C) 2003 American Institute of Physics MH - Germany MH - Mexico|Puebla MH - Russia MH - Ukraine MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000183156700030 L2 - IRON-GARNET FILMS; ENVELOPE SOLITONS; MAGNETIC-FILMS; FERROMAGNETIC-FILMS; SCATTERING; COLLAPSE; LIGHT SO - Chaos 2003 ;13(2):693-701 9538 UI - 6710 AU - Smale M AU - Bellon MR AU - Aguirre JA AU - Rosas IM AU - Mendoza J AU - Solano AM AU - Martinez R AU - Ramirez A AU - Berthaud J AD - Int Food Policy Res Inst, Washington, DC 20006, USAIPGRI, Rome, ItalyCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoInst Nacl Invest Forestales Agricolas & Pecuarias, Guanajuato, MexicoSmale, M, Int Food Policy Res Inst, 2033 K St NW, Washington, DC 20006 USA TI - The economic costs and benefits of a participatory project to conserve maize landraces on farms in Oaxaca, Mexico AB - Conventional methods were used to assess the benefits and costs of an unconventional project whose purpose was to test whether participatory crop improvement can encourage Mexican farmers to continue growing maize landraces by enhancing their current use value. Findings suggest that farmers as a group earned a high benefit-cost ratio from participating, though from the perspective of the private investor the returns were low. The project also generated social benefits, but these would be difficult (and costly) to measure. There was a gender bias in both participation and benefits distributions, though there is some evidence of a welfare transfer to maize deficit households. Application of other valuation approaches will be necessary in order to assess both the private and social benefits of similar projects. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - ???? AV - English IS - 0169-5150 UR - ISI:000187214000004 L2 - maize;on-farm conservation;participatory plant breeding;costs and benefits;Mexico;TECHNOLOGY; INCOME; POLICY SO - Agricultural Economics 2003 ;29(3):265-275 9539 UI - 9414 AU - Smale M AU - Meng E AU - Brennan JP AU - Hu RF AD - Int Plant Genet Resources Inst, I-00057 Rome, ItalyInt Maize & Wheat Improvement Ctr, Mexico City, DF, MexicoNSW Agr, Wagga Wagga, NSW, AustraliaChinese Acad Sci, Ctr Chinese Agr Policy, Inst Geog Sci & Natl Resource Res, Beijing, Peoples R ChinaSmale, M, Int Food Policy Res Inst, 2033 K St NW, Washington, DC 20006 USA TI - Determinants of spatial diversity in modern wheat: examples from Australia and China AB - The spatial distribution of modern varieties, and the genes they embody, has economic value because it affects crop productivity from year to year. Since farmers choose varieties based on observable traits rather than the genes they cannot see, a first step in understanding the spatial distribution of genes is to better understand the determinants of the spatial distribution of varieties. In this paper, we have constructed spatial diversity indices from area distributions of modern wheat varieties in Australia and China. We hypothesise that factors explaining variation in these indices are related to farmers' demand for traits and the supply of varieties, given physical features of the production environment. We test these hypotheses using reduced form equations for three concepts of spatial diversity, richness, abundance and evenness, using Zellner's seemingly unrelated regression (SUR). Spatial diversity indicators and analyses of this type, if more fully developed and targeted to address specific policy issues, may assist in monitoring crop genetic diversity or 'refuge' targets associated with the diffusion of some genetically modified crops. (C) 2002 Elsevier Science B.V. All rights reserved MH - Australia MH - Italy MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agricultural Economics & Policy;Economics U5 - J;Article NT - DUPLICATE AV - English IS - 0169-5150 UR - ISI:000180367400002 L2 - wheat;biodiversity;variety choice SO - Agricultural Economics 2003 ;28(1):13-26 9540 UI - 7905 AU - Smeyers YG AU - Villa M AD - CSIC, Inst Estructura Mat, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico TI - A study of the internal dynamics of inverting trimethylamine by means of the non-rigid group theory AB - The non-rigid molecule group (NRG), defined as the complete set of the symmetry physical operations which commute with some Hamiltonian operator, is applied to determine the character table for the three-fold methyl rotation and pyramidal inversion in trimethylamine. The restricted NRG of this molecule is seen to be a group of order 324, isomorphic to the G(324) of planar trimethylborane. For this purpose, the group structure of the r-NRG of inverting trimethylamine is first deduced, i.e. the character table, the number of classes and irreducible representations, as well as their dimensions. The symmetry eigenvectors for each representation were deduced by developing them on the basis of quadruple products of trigonometric functions. The dynamical properties of trimethylamine are analysed by inspecting the symmetries of the potential energy function. The r-NRG molecule group theory is seen to be a powerful tool for studying the internal dynamics of such highly symmetric molecules MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000184158800002 L2 - NON-RIGID MOLECULES; SYMMETRY GROUPS; METHYL; SPECTRUM; ACETONE SO - Molecular Physics 2003 ;101(12):1795-1803 9541 UI - 7835 AU - Smit MA AU - Hunter JA AU - Sharman JDB AU - Seamans GM AU - Sykes JM AD - Univ Oxford, Dept Mat, Oxford OX1 3PH, EnglandAlcan Int Ltd, Banbury OX16 7SP, EnglandCIE, Temixco 62580, Morelos, MexicoSykes, JM, Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England TI - Effect of organic additives on the performance of titanium-based conversion coatings AB - The performance on aluminium-manganese alloy 3003 of hexafluorotitanic acid (H2TiF6) conversion treatments incorporating either poly(acrylic acid) (PAA) or tannic acid (TA) has been studied and compared with coatings without organic additions and coatings containing only the two organic compounds. Polarisation curves were first used to assess the performance, and elucidate protective mechanisms in NaCl solutions. It is shown that for short immersion times, the addition of the organic components gives pitting potentials (defined here as the potential at which the pitting current passes 0.01 mA cm(-2)) higher than for H2TiF6 alone, with pitting currents increasing more slowly as the scan continued. However, after longer immersion, whereas the H2TiF6 based coatings without inhibitor shows steadily increasing pitting potentials, improvement with inhibitors was less marked, so that after three days the uninhibited coating showed the highest pitting potential. Pitting inhibition for the combined systems (defined here as the degree of separation between corrosion potential and pitting potential) is limited, and after longer immersion times is usually worse than H2TiF6 alone, and sometimes worse than bare alloy. Corrosion currents fall markedly with time for most samples, but the TA- and PAA-containing coatings also show strong inhibition when first exposed. To investigate the separate protective effects of the inorganic Ti-containing film and the organic additives, AC impedance spectra were measured for coatings of PAA or TA without the inorganic component and compared with spectra for coatings of H2TiF6 alone [Surf. Eng. 15 (1999) 407]. All three coatings show polarisation resistances increasing significantly over time, indicating falling corrosion rates. (C) 2003 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000184415500002 L2 - ELECTROCHEMICAL IMPEDANCE; POLY(ACRYLIC ACID); RUSTED STEEL; ALUMINUM; CORROSION; BEHAVIOR; SPECTROSCOPY; LAYERS SO - Corrosion Science 2003 ;45(9):1903-1920 9542 UI - 7897 AU - Smith ABT AU - Moron MA AD - Univ Nebraska, State Museum, Div Entomol, Lincoln, NE 68588, USAInst Ecol, Xalapa, Veracruz, MexicoSmith, ABT, Univ Nebraska, State Museum, Div Entomol, W436 Nebraska Hall, Lincoln, NE 68588 USA TI - Revision and phylogenetic analysis of the Central American endemic genus Phalangogonia Burmeister (Coleoptera : Scarabaeidae : Rutelinae : Anoplognathini) AB - Phalangogonia Burmeister is revised and now includes eight species: P. dispar Ohaus, P. jamesonae, sp.n., P. lacordairei Bates, P. ohesa Burmeister, P. parilis Bates, P. punctata Franz, P. ratcliffei, sp.n. and P. sperata Sharp. Phalangogonia debilidens Ohaus is placed in synonymy with P. sperata. Lectotypes are designated for the following nominal species: P. dispar Ohaus, P. lacordairei Bates, P. parilis Bates and P. championi Bates. Neotypes are designated for: P. obesa Burmeister, P. sperata Sharp, P. stipes Sharp and P. debilidens Ohaus. A cladistic analysis of the species of Phalangogonia was executed using thirty-two morphological characters of adults MH - Mexico|Veracruz MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Evolutionary Biology;Entomology U5 - J;Article AV - English IS - 0307-6970 UR - ISI:000184184500002 L2 - HINDWING ARTICULATION; GUERIN-MENEVILLE; BRACHYSTERNINA; SCARABAEOIDEA; BASE SO - Systematic Entomology 2003 ;28(3):323-338 9543 UI - 8757 AU - Smith GR AU - Lemos-Espinal JA AU - Ballinger RE AD - Denison Univ, Dept Biol, Granville, OH 43023, USAEscuela Nacl Estudios Profesionales Iztacala, Unidad Biol Tecnol & Prototipos, Ecol Lab, Los Reyes Iztacala 54090, Estado De Mexic, MexicoUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USASmith, GR, Denison Univ, Dept Biol, Granville, OH 43023, USA TI - Body size, sexual dimorphism, and clutch size in two populations of the lizard Sceloporus ochoteranae AB - We studied 2 populations of Sceloporus ochoteranae to determine if there were differences in body size, sexual dimorphism, and clutch size. Males were larger and had larger heads than females. Sceloporus ochoteranae from the Canon del Zopilote (elevation 600 m) were smaller, had narrower heads and longer femurs, and had smaller clutches than those from Acatlan (elevation 1,250 m) MH - Mexico|Estado De Mexico MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000182043500019 L2 - GALLOTIA-GALLOTI; MEXICO; ENERGETICS; SAUROMALUS; EVOLUTION; SAURIA SO - Southwestern Naturalist 2003 ;48(1):123-126 9544 UI - 6372 AU - Smith HM AU - Lemos-Espinal JA AU - Chiszar D AD - Univ Colorado, Dept Epo Biol & Museum, Boulder, CO 80309, USAUNAM, Lab Herpetol, UBIPRO, Escuela Nacl Estudios Prof Iztacala, Mexico City 54090, DF, MexicoUniv Colorado, Dept Psychol & Museum, Boulder, CO 80309, USASmith, HM, Univ Colorado, Dept Epo Biol & Museum, Boulder, CO 80309, USA TI - New subspecies of Sceloporus merriami (Reptilia : Lacertilia) and the derivation of its subspecies AB - We describe a new subspecies of Sceloporus merriami from extreme southeastern Chihuahua and adjacent Coahuila. We discuss the derivation of the 7 subspecies now known of S. merriami MH - Mexico|Distrito Federal MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000188387800025 SO - Southwestern Naturalist 2003 ;48(4):700-705 9545 UI - 9010 AU - Smith SV AU - Swaney DP AU - Talaue-McManus L AU - Bartley JD AU - Sandhei PT AU - McLaughlin CJ AU - Dupra VC AU - Crossland CJ AU - Buddemeier RW AU - Maxwell BA AU - Wulff F AD - Univ Hawaii, Dept Oceanog, Honolulu, HI 96822, USACornell Univ, Boyce Thompson Inst, Ithaca, NY 14850, USAUniv Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Affairs, Miami, FL 33149, USAUniv Kansas, Kansas Geol Survey, Lawrence, KS 66047, USAUniv Philippines, Inst Marine Sci, Diliman, PhilippinesNetherlands Inst Sea Res, Int Project Off, LOICZ, Texel, NetherlandsSwarthmore Coll, Dept Engn, Swarthmore, PA 19081, USAStockholm Univ, S-10691 Stockholm, SwedenSmith, SV, CICESE, Dept Ecol, Ensenada, Baja California, Mexico TI - Humans, hydrology, and the distribution of inorganic nutrient loading to the ocean AB - Most modern estimates of dissolved nitrogen and phosphorus delivery to the ocean use Meybeck's estimates from approximately 30 large rivers. We have derived an extended database of approximately 165 sites with nutrient loads. For both dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP), the logarithmic yields (log [load/area]) can be parameterized a functions of log (population density) and log (runoff/area) (R-2 for DIN and DIP approximately 0.6). Landscape production of DIN and DIP is largely assimilated. Even though DIN and DIP follow substantially different biogeochemical cycles, loading for DIN and DIP is tightly coupled (R-2 for log DIN versus log DIP approximately 0.8) with a constant loading ratio of about 18:1. Estimates of DIN and DIP fluxes are distributed globally around the world coastlines by using basin population density and runoff at 0.5degrees increments of latitude and longitude. We estimate that total loads for the 1990s are about three times Meybeck's estimates for the 1970s MH - Mexico|Baja California MH - Netherlands MH - Philippines MH - Sweden MH - USA PB - WASHINGTON: AMER INST BIOLOGICAL SCI RP - NOT IN FILE U3 - TC 36 U4 - Biology U5 - J;Article AV - English IS - 0006-3568 UR - ISI:000181433200014 L2 - global nutrient loads;eutrophication;human influence;rivers;NORTHEASTERN USA; NITROGEN; RIVERS; WATERSHEDS; EUTROPHICATION; DATABASE; INPUTS; MODEL SO - Bioscience 2003 ;53(3):235-245 9546 UI - 8745 AU - Snoeck C AU - Verreth C AU - Hernandez-Lucas I AU - Martinez-Romero E AU - Vanderleyden J AD - Ctr Microbial & Plant Genet, B-3001 Heverlee, BelgiumCtr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoVanderleyden, J, Ctr Microbial & Plant Genet, Kasteelpk Arenberg 20, B-3001 Heverlee, Belgium TI - Identification of a third sulfate activation system in Sinorhizobium sp strain BR816: the CysDN sulfate activation complex AB - Sinorhizobium sp. strain BR816 possesses two nodPQ copies, providing activated sulfate (3'-phosphoadenosine-5'-phosphosulfate [PAPS]) needed for the biosynthesis of sulfated Nod factors. It was previously shown that the Nod factors synthesized by a nodPQ double mutant are not structurally different from those of the wild-type strain. In this study, we describe the characterization of a third sulfate activation locus. Two open reading frames were fully characterized and displayed the highest similarity with the Sinorhizobium meliloti housekeeping ATP sulfurylase subunits, encoded by the cysDN genes. The growth characteristics as well as the levels of Nod factor sulfation of a cysD mutant (FAJ1600) and a nodP1 nodQ2 cysD triple mutant (FAJ1604) were determined. FAJ1600 shows a prolonged lag phase only with inorganic sulfate as the sole sulfur source, compared to the wild-type parent. On the other hand, FAJ1604 requires cysteine for growth and produces sulfate-free Nod factors. Apigenin-induced nod gene expression for Nod factor synthesis does not influence the growth characteristics of any of the strains studied in the presence of different sulfur sources. In this way, it could be demonstrated that the "household" CysDN sulfate activation complex of Sinorhizobium sp. strain BR816 can additionally ensure Nod factor sulfation, whereas the symbiotic PAPS pool, generated by the nodPQ sulfate activation loci, can be engaged for sulfation of amino acids. Finally, our results show that rhizobial growth defects are likely the reason for a decreased nitrogen fixation capacity of bean plants inoculated with cysD mutant strains, which can be restored by adding methionine to the plant nutrient solution MH - Belgium MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000182151800018 L2 - OLIGOSACCHARIDE NODULATION SIGNALS; VITRO SULFOTRANSFERASE ACTIVITY; SYMBIOTIC HOST-SPECIFICITY; PHASEOLUS-VULGARIS L; RHIZOBIUM-MELILOTI; NOD FACTORS; BRADYRHIZOBIUM-JAPONICUM; MUTATIONAL ANALYSIS; ATP SULPHURYLASE; DNA-SEQUENCE SO - Applied and Environmental Microbiology 2003 ;69(4):2006-2014 9547 UI - 5659 AU - Socolovsky M AD - Univ Valencia, Dept Fis Teor, Burjassot 46100, SpainNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSocolovsky, M, Univ Valencia, Dept Fis Teor, Burjassot 46100, Spain TI - Special relativity, EPR, and the collapse of the wave function AB - We discuss a paradox which appears in EPR experiments when the collapse of the wave function is analyzed in moving reference frames: the collapse can occur before the actual measurement of the spin component (or polarization) of one of the particles. We show that the paradox can be solved using the instantaneity of the reduction process in all reference frames. Using the same concept, we illustrate with an example the impossibility of defining, in certain circumstances, a covariant state vector in all regions of space-time MH - Mexico|Distrito Federal MH - Spain PB - BOLOGNA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0369-3554 UR - ISI:000220977400002 SO - Nuovo Cimento Della Societa Italiana di Fisica B-General Physics Relativity Astronomy and Mathematical Physics and Methods 2003 ;118(5):457-462 9548 UI - 7390 AU - Socolovsky M AD - Univ Valencia, Dept Fis Teor, E-46100 Burjassot, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSocolovsky, M, Univ Valencia, Dept Fis Teor, E-46100 Burjassot, Spain TI - Bell inequality, nonlocality and analyticity AB - The Bell and the Clauser-Horne-Shimony-Holt inequalities are shown to hold for both the cases of complex and real analytic nonlocality in the setting parameters of Einstein-Podolsky-Rosen-Bohm experiments for spin 1/2 particles and photons, in both the deterministic and stochastic cases. Therefore, the theoretical and experimental violation of the inequalities by quantum mechanics excludes all hidden variables theories with that kind of nonlocality. In particular, real analyticity leads to negative definite correlations, in contradiction with quantum mechanics. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000185417300002 L2 - Bell inequality;nonlocality;EPRB;analyticity;LOCALITY CONDITIONS; VIOLATION; ROTATIONS; THEOREM SO - Physics Letters A 2003 ;316(1-2):10-16 9549 UI - 8486 AU - Solari LA AU - Keppie JD AU - Ortega-Gutierrez F AU - Cameron KL AU - Lopez R AU - Hames WE AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064, USAW Valley Coll, Dept Geol, Saratoga, CA 95070, USAAuburn Univ, Dept Geol, Auburn, AL 36849, USASolari, LA, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - 990 and 1100 Ma Grenvillian tectonothermal events in the northern Oaxacan Complex, southern Mexico: roots of an orogen AB - Inliers of similar to 1.0-1.3 Ga rocks occur throughout Mexico and form the basement of the Oaxaquia microcontinent. In the northern part of the largest inlier in southern Mexico, rocks of the Oaxacan Complex consist of the following structural sequence of units (from bottom to top), which protolith ages are: (1) Huitzo unit: a 1012 +/- 12 Ma anorthosite-mangerite-charnockite-granite (AMCG) suite; (2) El Catrin unit: greater than or equal to 1350 Ma orthogneiss migmatized at 1106 +/- 6 Ma; and (3) El Marquez unit: greater than or equal to1140 Ma para- and orthogneisses. These rocks were affected by two major tectonothermal events that are dated using U-Pb isotopic analyses of zircon: (a) the 1106 +/- 6 Ma Olmecan event produced a migmatitic or metamorphic differentiation banding folded by isoclinal folds; and (b) the 1004-978 +/- 3 Ma Zapotecan event produced at least two sets of structures: (ZI) recumbent, isoclinal, Class 1C/3 folds with gently NW-plunging fold axes that are parallel to mineral and stretched quartz lineations under granulite facies metamorphism; and (Z2) tight, upright, subhorizontal VVNW- to NNE-trending folds accompanied by development of brown hornblende at upper amphibolite facies metamorphic conditions. Cooling through 500 degreesC at 977 +/- 12 Ma is documented by Ar-40/Ar-39 analyses of hornblende. Fold mechanisms operating in the northern Oaxacan Complex under Zapotecan granulite facies metamorphism include flexural and tangential-longitudinal strain accompanied by intense flattening and stretching parallel to the fold axes. Subsequent Phanerozoic deformation includes thrusting and upright folding under lower-grade metamorphic conditions. The Zapotecan event is widespread throughout Oaxaquia, and took crustal rocks to a depth of similar to 25-30 km by orogenic crustal thickening, and is here designated as Zapotecan Orogeny. Modem analogues for Zapotecan granulite facies metamorphism and deformation occur in middle to lower crustal portion of subduction and collisional orogens. Contemporaneous tectonothermal events took place throughout Oaxaquia, and in various parts of the Genvillian orogen in Laurentia and Amazonia. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000182642100014 L2 - Oaxaquia;Mexico;Grenville;U-Pb geochronology;granulite metamorphism;U-PB GEOCHRONOLOGY; WESTERN UNITED-STATES; NOVA-SCOTIA; EVOLUTION; TERRANE; EASTERN; AGE; METAMORPHISM; LAURENTIA; ZIRCON SO - Tectonophysics 2003 ;365(1-4):257-282 9550 UI - 7784 AU - Sole J AU - Pi T AU - Enrique P AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Barcelona, Fac Geol, Dept Geoquim Petrol & Prospeccio Geol, E-08028 Barcelona, SpainSole, J, Univ Nacl Autonoma Mexico, Inst Geol, Cd Univ, Mexico City 04510, DF, Mexico TI - New geochronological data on the Late Cretaceous alkaline magmatism of the northeast Iberian Peninsula AB - Alkaline magmatic activity took place in the Iberian Peninsula during the Late Cretaceous, between c. 100 and c. 65 Ma. This magmatism is well known only in southern Portugal and the Pyrenees. We present Ar-40/Ar-39 and K/Ar ages from three alkaline lamprophyres (camptonites) located in the Catalan Coastal Ranges. The ages obtained (80, 76 and 69 Ma) indicate that the intrusives concerned represent the youngest Mesozoic alkaline magmatism dated so far in the northeast Iberian Peninsula, establishing a link between the Pyrenean and Portuguese alkaline magmatism. Their position at the margin of the Iberian Plate is noteworthy and indicates the presence of zones of cortical relaxation (and perhaps thinning) after Iberian Plate rotation and during ocean-floor spreading in the North Atlantic. (C) 2003 Published by Elsevier Ltd MH - Mexico|Distrito Federal MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0195-6671 UR - ISI:000184609000006 L2 - lamprophyre;camptonite;Spain;Late Cretaceous;K/Ar;Ar-40/Ar-39;K-AR; ATLANTIC-OCEAN; GORRINGE BANK; PYRENEES; SPAIN; AGES; METAMORPHISM; AR-40-AR-39; AR-39-AR-40; EMPLACEMENT SO - Cretaceous Research 2003 ;24(2):135-140 9551 UI - 7451 AU - Soler-Diaz A AU - Gutierrez-Jurado C AU - Sanchez-Morito N AU - Ruiz-Contreras A AU - Gonzalez-Martinez MT AD - Univ Granada, Fac Med, E-18012 Granada, SpainUniv Nacl Autonoma Mexico, Fac Med, Mexico City 04510, DF, Mexico TI - Kinetic analysis of a Na/Mg exchange present in rat thymocytes MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000183123802547 SO - Biophysical Journal 2003 ;84(2):518A-518A 9552 UI - 8347 AU - Solis-Perales G AU - Ayala V AU - Kliemann W AU - Femat R AD - IPICyT, Dept Matemat & Sistemas Computac, Tangamanga San Luis Poto 78231, SLP, MexicoUniv Catolica Norte, Dept Matemat, Antofagasta, ChileIowa State Univ Sci & Technol, Dept Math, Ames, IA 50011, USASolis-Perales, G, IPICyT, Dept Matemat & Sistemas Computac, Aptdo Postal 3-05, Tangamanga San Luis Poto 78231, SLP, Mexico TI - Complete synchronizability of chaotic systems: A geometric approach AB - Synchronizability of chaotic systems is studied in this contribution. Geometrical tools are used to understand the properties of vector fields in affine systems. The discussion is focused on synchronizability of chaotic systems with equal order. The analysis is based on the synchronous behavior of all states of the master/slave system (complete synchronization). We state sufficient and necessary conditions for complete synchronizability which are based on controllability and observability of nonlinear affine systems. In this sense, the synchronizability is studied for complete synchronization via state feedback control. (C) 2003 American Institute of Physics MH - Chile MH - Mexico|San Luis Potosi MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000183156700008 L2 - DYNAMICAL-SYSTEMS; OSCILLATORS SO - Chaos 2003 ;13(2):495-501 9553 UI - 6994 AU - Sommer R AU - Folster H AU - Vielhauer K AU - Carvalho EJM AU - Vlek PLG AD - Univ Gottingen, Inst Soil Sci & Forest Nutr, D-37077 Gottingen, GermanyEMBRAPA Amazonia Oriental, BR-66095100 Belem, Para, BrazilUniv Bonn, Ctr Dev Res, ZEF, D-53113 Bonn, GermanySommer, R, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Deep soil water dynamics and depletion by secondary vegetation in the Eastern Amazon AB - Secondary/fallow vegetation is found extensively in the Eastern Amazon. The role of this deep-rooting vegetation in the hydrological cycle is unknown. We studied the water dynamics of this vegetation with emphasis on the deeper soil by means of a soil water model. The soil hydraulic properties were optimized in an inverse modeling procedure using the soil water model Hydrus-1D providing rainfall, actual evapotranspiration (E-a) determined with the Bowen ratio energy balance method (BREB), rooting depth, and distribution, as well as the in situ control measurements of soil water pressure head and soil moisture. In 1997, E-a according to BREB measurements amounted to 1174 mm, in 1998 this was 1475 mm. Modeled drainage at a 10-m depth in the 2 yr was 951 and 1016 torn, respectively. The model indicated that around 27% of the soil water was taken up below the 0.9-m depth in the 2-yr study period. During the severe 1997 dry season, according to the soil water model E-a was reduced drastically, as the soil water storage was depleted. According to micrometeorological measurements, however, E-a was not reduced as extremely. This difference might be due to general uncertainties of the soil water model as well as BREB measurements. On the other hand, formation and subsequent evaporation of early morning dew apparently contributed to E-a, which was not considered in the soil water model. In general, besides slightly lower interception, the water budget of a young secondary vegetation did not differ from that reported for Amazonian primary forest MH - Brazil MH - Germany MH - Mexico|Distrito Federal PB - MADISON: SOIL SCI SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Soil Science U5 - J;Article AV - English IS - 0361-5995 UR - ISI:000186450500005 L2 - UNSATURATED HYDRAULIC CONDUCTIVITY; TROPICAL RAIN-FOREST; FLOW EQUATION; POROUS-MEDIA; WEST JAVA; MODEL; INTERCEPTION; THROUGHFALL; EVAPORATION; DRAINAGE SO - Soil Science Society of America Journal 2003 ;67(6):1672-1686 9554 UI - 7462 AU - Soriano-Garcia M AU - Avellaneda CR AU - guirre-Hernandez G AD - UNAM, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoPonteficia Univ Javeriana, Dept Fis, Bogota, ColombiaInst Tecnol Tijuana, Ctr Grad & Invest, Tijuana, Baja California, MexicoSoriano-Garcia, M, UNAM, Inst Quim, Dept Bioquim, Mexico City 04510, DF, Mexico TI - Crystal structure of 6-benzylamino-9-[2-tetrahydropyranyl]-9H-purine AB - C17H19O2N5 is monoclinic, P2(1)/n. Unit-cell dimensions at 293 K are a = 10.802(1), b = 24.085(2), c = 12.933(1)Angstrom, beta = 106.119(6)degrees, V = 3232.4(6)Angstrom(3), D-x = 1.271 g/cm(3), and Z = 8. The R value is 0.068 for 3017 observed reflections. There are two independent molecules in the asymmetric unit, denoted by A and B. In A, the dihedral angle between the adenine moiety and the phenyl ring is 73.2(3)degrees [in B, the angle is 83.9(2)degrees]. For A, the tetrahydropyranyl ring adopts a half-chair conformation [for B, chair conformation]. The packing in the crystal is entirely due to van der Waals forces MH - Colombia MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - TOKYO: JAPAN SOC ANALYTICAL CHEMISTRY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0910-6340 UR - ISI:000185433000023 L2 - CYTOKININS; KINETIN SO - Analytical Sciences 2003 ;19(9):1343-1344 9555 UI - 8070 AU - Soriano VE AU - Vera NA AU - Salado CR AU - Fernandez RP AU - Blackall PJ AD - Biointesis Lab SA, Dept Invest & Desarrollo, Toluca 50130, MexicoUniv Autonoma Estado Mexico, Fac Med Vet & Zootecnia, Ctr Invest & Estudios Avanados & Salud Anim, Toluca 50000, MexicoQueensland Dept Primary Ind, Anim Res Inst, Agcy Food & Fibre Sci, Yeerongpilly, Qld 4105, AustraliaSoriano, VE, Juan Alvarez 311-2,Col Francisco Muruia, Toluca 50130, Mexico TI - In vitro susceptibility of Ornithobacterium rhinotracheale to several antimicrobial drugs AB - As part of the basic characterization of Ornithobacterium rhinotracheale, the minimal inhibitory concentrations of 10 antimicrobial drugs were determined for reference strains and Mexican isolates by a broth microdilution method. For optimal growth of the organisms, a supplemented brain-heart infusion broth was used. The susceptibility of O. rhinotracheale to amoxicillin, enrofloxacin, and oxytetracycline was variable. However, consistent higher minimal inhibitory concentrations values were obtained for gentamicin, fosfomycin, trimethoprim, sulfamethazine, sulfamerazine, sulfaquinoxaline, and sulfachloropyridazine. Obtained results among Mexican isolates indicate a marked antimicrobial drug resistance trend MH - Australia MH - Mexico|Estado De Mexico PB - KENNETT SQ: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 5 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000183959700026 L2 - Ornithobacterium rhinotracheale;antimicrobial drugs;susceptibility;broth microdilution;ANTIBIOTIC-SENSITIVITY; STRAINS; INFECTION; TURKEY; IDENTIFICATION; CHICKENS SO - Avian Diseases 2003 ;47(2):476-480 9556 UI - 7164 AU - Sosa E AU - Cabrera-Sierra R AU - Oropeza MT AU - Hernandez F AU - Casillas N AU - Tremont R AU - Cabrera C AU - Gonzalez I AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Area Electroquim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoUniv Guadalajara, Dept Quim, Guadalajara 44430, Jalisco, MexicoUniv Puerto Rico, Dept Quim, San Juan, PR 00931, USASosa, E, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Area Electroquim, Mexico City 09340, DF, Mexico TI - Chemical characterization of corrosion films electrochemically grown on carbon steel in alkaline sour environment AB - Surface reactivity and the chemical nature of corrosion films electrochemically formed on carbon steel in a 1 M (NH4)(2)S and 500 ppm CN- medium for different growth times were studied by scanning photoelectrochemical microscopy (SPECM) and X-ray photoelectron spectroscopy (XPS). SPECM diagrams corresponding to films grown for times <15 min revealed their heterogeneous and protective nature, while for times >15 min these films showed surface activity and homogeneity in the characterization medium. The XPS spectra of Fe 2p, S 2p, and O 1s on the film surface indicated that FeS2 and FeO are present in the protective (heterogeneous) films; meanwhile, Fe(OH) and FeS are the chemical species present in nonprotective (homogeneous) films. The O 1s peak analysis using a mix of Gaussian and Lorentzian functions indicated that during film growth both H2O and/or hydroxyl groups are incorporated into the film structure. These results prove that the corrosion film composition was modified as a function of electrochemical oxidation time and this composition is directly related to the passive properties of these films. (C) 2003 The Electrochemical Society. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 3 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000186049600029 L2 - MEDIA; SPECTROSCOPY; MICROSCOPY; IMPEDANCE SO - Journal of the Electrochemical Society 2003 ;150(11):B530-B535 9557 UI - 8417 AU - Sosa E AU - Cabrera-Sierra R AU - Oropeza MT AU - Hernandez F AU - Casillas N AU - Tremont R AU - Cabrera C AU - Gonzalez I AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Area Electroquim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoUniv Guadalajara, Dept Quim, Guadalajara 44430, Jalisco, MexicoUniv Puerto Rico, Dept Chem, San Juan, PR 00931, USAGonzalez, I, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Area Electroquim, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Electrochemically grown passive films on carbon steel (SAE 1018) in alkaline sour medium AB - Corrosion films were prepared by applying cyclic potential pulses to the 1018 carbon steel-sour medium interface (1 M (NH4)(2)S, 500 ppm CN-) for 1 min. Electrochemical behavior and surface morphology of these films were determined using electrochemical impedance spectroscopy (EIS), scanning electron microscopy, and scanning photoelectrochemical microscopy (SPECM). EIS diagrams and SPECM images show the passive properties and homogeneity of the films. Furthermore, X-ray photoelectron spectroscopy (XPS) was used to characterize their chemical nature and structure. XPS results show that different oxide and sulfur structures were developed during the electrochemical oxidation of carbon steel in concentrated sour media. The analysis of 0 Is data indicated that, during film growth, H2O and/or hydroxyl groups are incorporated into the film structure. The XPS spectra of Fe 2p show iron bonds with S as iron sulfide (FeS2 and FeS) and the corresponding peak of O 1s shows those bonds with oxygen as Fe2O3 and/or FeO. XPS depth profile analyses for the film showed that the ratio of Fe-S and Fe-O increases from film surface to film-carbon steel interface. This corroborates the diffusion of iron ions through the film during its electrochemical growth. The chemical shift through the film for the peak associated with Fe 2p signal proves that transport mechanism of iron ions through the film is carried out by chemical diffusion. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000183026000003 L2 - corrosion;carbon steel;alkaline sour media;iron sulfide film;EIS;SEM;SPECM;XPS;IRON SULFIDE FILMS; IMPEDANCE SPECTROSCOPY; HYDROGEN-SULFIDE; CHLORIDE MEDIA; CORROSION; PYRITE; ENVIRONMENTS; MICROSCOPY; INHIBITION; PRODUCTS SO - Electrochimica Acta 2003 ;48(12):1665-1674 9558 UI - 6991 AU - Sosa V AU - Chase MW AU - Barcenas C AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoRoyal Bot Gardens, Jodrell Lab, Mol Systemat Sect, Richmond TW9 3DS, Surrey, EnglandSosa, V, Inst Ecol AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Chiangiodendron (Achariaceae): an example of the Laurasian flora of tropical forests of Central America AB - Using plastid rbcL DNA sequences, we evaluated relationships of the monotypic genus Chiongiodendron (C. mexicanum), which has been thought to be the only New World member of Flacourtiaceae, tribe Pangieae, by some authors. The analysis consisted of two steps. In the first, we analyzed the rbcL sequence of Chiangiodendron in a large eudicot matrix (more than 500 representatives). Based on these results, a second, restricted analysis with 142 taxa was conducted. Chiangiodendron belongs to tribe Pangieae (which is now recognized as part of Achariaceae, whereas the rest of former Flacourtiaceae fall into Salicaceae s.l.), making Chiangiodendron the only American representative of that tribe. Its closest relatives are from Asia. Chiangiodendron is a relict of a wet-tropical Laurasian flora that has been preserved in Neotropical refugia MH - United Kingdom MH - Mexico|Veracruz PB - VIENNA: INT ASSOC PLANT TAXONOMY RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0040-0262 UR - ISI:000186452900009 L2 - Achariaceae;Chiangiodendron;Flacourtiaceae;Pleistocene refuge theory;rbcL sequences;FLACOURTIACEAE; DIVERSITY; MEXICO SO - Taxon 2003 ;52(3):519-524 9559 UI - 8953 AU - Sosa V AU - Chase MW AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoRoyal Bot Gardens, Jodrell Lab, Mol Systemat Sect, Richmond TW9 3DS, Surrey, EnglandSosa, V, Inst Ecol AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Phylogenetics of Crossosomataceae based on rbcL sequence data AB - Using rbcL plastid DNA sequences, we evaluated monophyly and relationships of the genera of Crossosomataceae, which are a small group of shrubs from North America and Mexico: Crossosoma, Apacheria, Glossopetalon (Forsellesia), and Velascoa. Morphological characters that correspond to the phylogenetic patterns were examined. The analysis consisted of two steps. In the first, we analyzed the sequences of representatives of the four genera with those of over 500 species of eudicots. Based on these results, a second, restricted analysis with 25 taxa was conducted. Crossosomataceae are monophyletic and the four genera fell into a well-supported clade with representatives of Stachyuraceae and Staphyleaceae. Characters that mark Crossosomataceae are: microphyllous leaves (less than 5 cm long), solitary flowers with an apocarpous ovary and hypanthium, ventrally dehiscent follicles, and seeds with a fimbriate or irregular aril. A brief description of the family and an identification key for the genera are presented MH - United Kingdom MH - Mexico|Veracruz PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000181505800009 L2 - SAXIFRAGACEAE SENSU-LATO; ATPB; EVOLUTION; PLANTS; DNA SO - Systematic Botany 2003 ;28(1):96-105 9560 UI - 7878 AU - Sosa VJS AU - Gonzalez GS AU - Navarro L AU - Perez J AD - Ctr Nacl Invest & Desarrollo Tecnol, Cuernavaca 62490, Morelos, Mexico. Univ Politecn Catalunya, E-08034 Barcelona, Spain TI - A resilient web caching architecture AB - A Web caching infrastructure is built using groups of HTTP proxy servers that share cached objects. This paper describes an architecture that takes the best of several Web caching configurations that we have previously analyzed. The flexibility of our architecture is demonstrated and how the access to remote Web objects is improved regardless of the changes that might occur on the network environment (which in term, might cause changes in Web object validation policies and types of caching communication). We have seen that some cooperative Web caching architectures are unviable when changes on the network environment appear. These changes give, as a result a degradation of performance in the remote access. The situation mentioned suggests that the use of a cooperative Web caching system is unviable. We demonstrated that with our architecture we have a Web cache system that remains viable even if some changes are needed in the Web cache configuration MH - Mexico|Morelos MH - Spain T3 - COMPUTATIONAL SCIENCE AND ITS APPLICATIONS - ICCSA 2003Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBX11U AV - English IS - 0302-9743 UR - ISI:000184326400018 SO - 2003 ;():160-169 9561 UI - 9437 AU - Soto-Rodriguez SA AU - Simoes N AU - Jones DA AU - Roque A AU - Gomez-Gil B AD - CIAD, AC Mazatlan Unit Aquaculture & Environm Managemen, Mazatlan 82000, Sinaloa, MexicoCICESE, Dept Aquaculture, Ensenada, Baja California, MexicoUniv Coll N Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, WalesGomez-Gil, B, CIAD, AC Mazatlan Unit Aquaculture & Environm Managemen, AP 711, Mazatlan 82000, Sinaloa, Mexico TI - Assessment of fluorescent-labeled bacteria for evaluation of in vivo uptake of bacteria (Vibrio spp.) by crustacean larvae AB - Available methods to study crustacean digestive tract colonization by bacteria are laborious, time-consuming, and do not permit in vivo assays and observation. This paper reports on a rapid and consistent technique to apply a sfluorescent label to bacteria, which can then be presented to filter-feeding crustacea such as Artemia and penaeid larvae for later in situ bacterial distribution observation. Three luminescent Vibrio spp. were stained and observed inside Artemia nauplii, shrimp zoea and mysis stages, Vibrio harveyi type strain ATCC 14126, M-1 (pathogenic) and Ea (non-pathogenic). Factors such as dye (DTAF) concentration, exposure time/temperature and sonication time were evaluated. Viability of the dye and stained bacteria were tested at 4, - 20 and - 70 degreesC storage temperatures for up to 81 days. Results show that 4 and - 20 degreesC storage temperatures are not recommended. At - 70 degreesC, both bacteria and dye are optimally preserved. Monodispersed fluorescent-labeled bacterial cells can be observed inside the digestive tract of crustacean larvae at a density of inoculation as high as 5.2 x 10(6) CFU ml(-1). After 2 to 4 h, some leaching occurs, increasing difficulty in observation, although after 24 h, it is still possible to observe monodispersed FLB inside the digestive tract of crustacean larvae. Autofluorescence may complicate observation when filter-feeding crustacean larvae are co-fed with microalgae. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Sinaloa MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Microbiology U5 - J;Article AV - English IS - 0167-7012 UR - ISI:000180235800011 L2 - Artemia;DTAF;FLB;shrimp larvae;Vibrio harveyi;PENAEUS-MONODON LARVAE; JAPANESE COASTAL CRUSTACEA; LUMINOUS BACTERIA; ARTEMIA-FRANCISCANA; CALLINECTES-SAPIDUS; SURFACE-PROPERTIES; EPITHELIAL-CELLS; BRINE SHRIMP; MARINE FISH; BLUE-CRAB SO - Journal of Microbiological Methods 2003 ;52(1):101-114 9562 UI - 6489 AU - Soto AT AU - Vera ICD AU - Nicol JM AU - Evans K AU - Islas JSS AU - Garza AM AD - Escuela Nacl Ciencias Biol, IPN, Dept Parasitol, Mexico City, DF, MexicoEdo Mexico, Mexico City, DF, MexicoCIMMYT, Int Wheat & Maize Improvement Ctr, Ankara, TurkeyNematode Interact Unit, Harpenden AL5 2JQ, Herts, EnglandSoto, AT, Escuela Nacl Ciencias Biol, IPN, Dept Parasitol, Apdo Postal 256, Mexico City, DF, Mexico TI - Cactodera galinsogae n. sp (Tylenchida : Heteroderinae) on barley (Hordeum vulgare L.) of the High Valleys of Mexico AB - Cactodera galinsogae n. sp. (Heteroderinae) was isolated from dicotyledonous Galinsoga parviflora (Asteraceae) roots. It also reproduced on barley (Hordeum vulgare) and wild oats (Avena fatua) (Poaceae) and on other dicotyledonous weeds, notably Bidens odorala (Asteraceae). The samples were taken from a cultivated field of barley in the town of "La Raya", municipality of Singuilucan, Hidalgo, in the Central Valleys of Mexico. Cactodera galinsogae is characterized by the vulval cone of the females and the cysts are smaller than in most other species of this genus, with a straight neck, and the vulval cone with circumfenestra but without vulval denticles. The cysts are small (average length 523 pm), spherical or sub-spherical and light to dark brown with a straight neck, and with the transverse branching striae of the cuticle surface pattern of the midbody forming an interlaced pattern. The second stage juveniles have six pseudolips, and four lateral lines with incomplete areolation (non-areolated internal lines) on the side of the body. The eggs are retained in the females, although a gelatinous matrix (without eggs) is observed in some. The egg-shells, when observed under the scanning electron microscope, show a specific pattern of punctations. The males are cylindrical and small (average length 830 pm) compared to the other species of Cactodera. They adopt a 'C' shape when killed by heat, with 4-5 lip annuli on the irregular labial region. The excretory pore is located at the level of the esophageal gland lobe (distance from the anterior end to the excretory pore/L = 14.7%). The spicules are slightly curved and bifid MH - United Kingdom MH - Mexico|Distrito Federal MH - Turkey PB - AUBURN: ORGANIZATION TROP AMER NEMATOLOGISTS RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0099-5444 UR - ISI:000188000100004 L2 - Hordeum vulgare;Cactodera galinsogae;cyst forming nematode;heteroderinae;Galinsoga parviflora;Bidens odorata;Avena fatua;new species;High Valleys of Mexico;taxonomy;weeds;CYST-FORMING NEMATODE; LUC ET-AL; CLASSIFICATION; MORPHOLOGY SO - Nematropica 2003 ;33(1):41-54 9563 UI - 7459 AU - Soto G AU - de la Cruz W AU - Diaz JA AU - Machorro R AU - Castillon FF AU - Farias MH AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Characterization of tungsten oxide films produced by reactive pulsed laser deposition AB - Tungsten oxide thin films have been prepared by reactive pulsed laser deposition (PLD). Substrate heat treatment and oxygen partial pressure during growth are correlated with Auger electron (AES), X-ray photoelectron (XPS), electron energy loss (EELS) and transmittance spectroscopies. Electronic and mass densities, composition and chemical states are strongly dependent of the deposition conditions. No significant change in the oxygen content in films as a function of substrate or annealing temperature is detected. However, the colored state turns out to be associated to the degree of chemical disorder in the samples, as evidenced by the peak shape of the W 4f transition. Also, the strength of a characteristic energy loss at 6-7 eV appears to be related to the presence of the colored state. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000185491500036 L2 - tungsten oxide;pulsed laser deposition;optical properties;XPS;AES;EELS;deposition conditions;characterization methods;THIN-FILMS; AMORPHOUS WO3; COLORATION; DEPENDENCE; ABSORPTION; STATE SO - Applied Surface Science 2003 ;218(1-4):281-289 9564 UI - 7643 AU - Soto G AU - Diaz JA AU - de la Cruz W AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Copper nitride films produced by reactive pulsed laser deposition AB - Deposition of copper nitride films is of importance due to its technological applications. Copper nitride thin films are deposited by reactive pulsed laser deposition (nitrogen environments) on silicon substrates at room temperature. The resultant films are in situ characterized by Auger.(AES), X-Ray Photoelectron (XPS) and Reflection Electron Energy Loss spectroscopies (REELS). The chemical bond is strongly linked to the stoichiometry, and both can be controlled by the deposition pressure. The mass density achieved for Cu3N is 5.91 g cm(-3), close to the theoretical value of 5.84 g cm(-3). We conclude that this deposition method offers a means for fine-tuning the properties of copper nitride. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000184875800003 L2 - electronic materials;deposition;thin films;characterization methods SO - Materials Letters 2003 ;57(26-27):4130-4133 9565 UI - 8160 AU - Soto G AU - de la Cruz W AU - Castillon FF AU - Diaz JA AU - Machorro R AU - Farias MH AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Tungsten nitride films grown via pulsed laser deposition studied in situ by electron spectroscopies AB - Tungsten nitride (WNx) films were grown on silicon and glass slide substrates by laser ablating a tungsten target in molecular nitrogen ambient. By in situ Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS), the films density, elemental composition and chemical state were determined. Ex situ, the films were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Also, the transmittance and resistivity of the film on glass substrates were determined. The results show that the reaction of tungsten and nitrogen is effective; the nitrogen is integrated in the tungsten matrix changing gradually the electronic configuration, chemical states and film properties. Since with this preparation method the obtained films are of high quality, low resistivity and dense, this makes attractive to growth tungsten nitride films for technological applications. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000183731800008 L2 - tungsten nitride;WNx;pulsed laser deposition;EELS;XPS;AES;thin films;THIN-FILMS; STRUCTURAL-PROPERTIES; ABLATION SO - Applied Surface Science 2003 ;214(1-4):58-67 9566 UI - 8167 AU - Soto G AU - Machorro R AU - Diaz JA AU - de la Cruz W AU - Reyes A AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Growth of beryllium nitride films by pulsed laser deposition; dielectric function determination AB - Beryllium nitride thin films, which are candidates for optoelectronic applications, have been grown by pulsed laser deposition on silicon substrates. The films were prepared by ablating a beryllium foil in N-2 environment at several pressures and substrate temperatures. Real-time ellipsometric monitoring for the period of deposition were carried out by a multiwavelength ellipsometer in the 1.625less than or equal tohpless than or equal to4.405 eV photon-energy range. After its completion, the films were characterized in situ by electron spectroscopies and ex situ by atomic force and scanning electron microcopies. A model for the growth of beryllium nitride was applied to reproduce the optical measurement and concurrently, the refractive index from the visible to the near ultraviolet spectral region was calculated. The estimated optical bandgap correlates closely with previously published theoretical results. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183700000002 L2 - ellipsometry;optical properties;beryllium nitride;optoelectronic films;THIN-FILMS; SPECTROSCOPIC ELLIPSOMETRY; ELECTRONIC-STRUCTURE; ALUMINUM-NITRIDE; BETA-BE3N2; MAGNESIUM; ABLATION SO - Thin Solid Films 2003 ;434(1-2):7-13 9567 UI - 8776 AU - Soto H AU - Topomondzo JD AU - Erasme D AU - Castro M AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoEcole Natl Super Telecommun Bretagne, CNRS, URA 820, Dept Commun, F-75634 Paris 13, FranceSoto, H, Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Apartado Postal 2732, Ensenada 22800, Baja California, Mexico TI - All-optical NOR gates with two and three input logic signals based on cross-polarization modulation in a semiconductor optical amplifier AB - In this work we present all-optical NOR gates with two and three input logic signals using the cross-polarization modulation (XPoIM) effect in a semiconductor optical amplifier (SOA). The gates utilize a single SOA and it needs neither an inversion stage nor an additional synchronized clock. Unlike the gates based on cross-gain and cross-phase modulation in SOAs, the gates presented in this work need neither interforemetric configurations nor input logic signals producing a strong saturation of the amplifier gain. Based on a discussion of the XPoIM effect, we present the design criteria allowing the implementation of the all-optical NOR gates with two and three input logic signals. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000181990900007 L2 - opto-electronic devices;semiconductor optical amplifiers;optical logic devices;optical propagation in nonlinear media;optical waveguides;boolean functions;INTERFEROMETER; XOR SO - Optics Communications 2003 ;218(4-6):243-247 9568 UI - 8056 AU - Spirin VV AU - Swart PL AU - Chtcherbakov AA AU - Miridonov SV AU - Shlyagin MG AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoRand Afrikaans Univ, Fac Engn, ZA-2006 Auckland Pk, South AfricaSpirin, VV, CICESE, Div Fis Aplicada, Apdo Postal 2732, Ensenada 22860, Baja California, Mexico TI - Distributed fibre-optic loss sensor with chirped Bragg grating based on transmission-reflection analysis AB - A novel distributed fibre-optic loss sensor with chirped Bragg grating based on the analysis of transmitted and reflected powers is presented. The localisation of loss region with error equal to +/-2 mm along the 10 cm chirped grating for 0.7 dB induced loss is demonstrated MH - Mexico|Baja California MH - South Africa PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000183896000009 SO - Electronics Letters 2003 ;39(12):895-897 9569 UI - 6274 AU - St Peter WL AU - Obrador GT AU - Roberts TL AU - Pereira BJG AU - Collins AJ AD - Minneapolis Med Res Fdn Inc, Analyt Serv, Minneapolis, MN, USAUniv MN, Minneapolis, MN, USATufts New England Med Ctr, Boston, MA, USAUniv Panamer, Escuela Med, Mexico City, DF, Mexico TI - Trends in intravenous iron use among dialysis patients in the United States (1994-2001) MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219103841 SO - Journal of the American Society of Nephrology 2003 ;14():834A-834A 9570 UI - 8434 AU - Stapelfeldt KR AU - Menard F AU - Watson AM AU - Krist JE AU - Dougados C AU - Padgett DL AU - Brandner W AD - CALTECH, Jet Prop Lab, Pasadena, CA 91109, USAObserv Grenoble, Astrophys Lab, F-38041 Grenoble 9, FranceUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoSpace Telescope Sci Inst, Baltimore, MD 21218, USACALTECH, SIRTF Sci Ctr, Pasadena, CA 91125, USAMax Planck Inst Astron, D-69117 Heidelberg, GermanyStapelfeldt, KR, CALTECH, Jet Prop Lab, Mail Stop 183-900,4800 Oak Grove Dr, Pasadena, CA 91109 USA TI - Hubble Space Telescope WFPC2 imaging of the disk and jet of HV Tauri C AB - We have obtained Hubble Space Telescope (HST) WFPC2 images of the HV Tauri young triple system. The tertiary star appears as a compact bipolar nebula at visual wavelengths as already known in the near-infrared. New, deeper adaptive optics observations made at the Canada-France-Hawaii Telescope show no point source in the nebula to a limiting magnitude of K > 15. The results therefore confirm that HV Tau C is an optically thick circumstellar disk seen close to edge-on. Clear evidence for small, chromatic dust particles in the outer disk is provided by the color structure of the nebula: the thickness of the central dust lane shrinks by 30% between 0.55 and 2.2 mum. Bipolar jets extending 0."3-0."7 perpendicular to the dust lane are seen in HST narrowband [S II] and [O I] images. The continuum images are compared to multiple scattering models, with optimal density model parameters derived through chi(2) minimization. A disk density distribution provides a reasonable fit to the K-band image but is unable to reproduce the vertical extent of the nebula at I band without resorting to an unreasonably large scale height. Adding an envelope structure around the disk results in a much better fit to the HST image, and with a physically reasonable disk scale height. Our preferred model has a disk outer radius of 50 AU, inclination of 6degrees, and scale height of 6.5 AU at r = 50 AU. The thickness of the dark lane establishes a disk mass near 2 x 10(-3) M. (similar to2 M-Jup) of dust and gas, if the dust grains have interstellar properties and remain fully mixed vertically. The envelope, with a much smaller mass similar to4 x 10(-5) M., would be very short-lived unless replenished by new material from the star or surrounding medium MH - USA MH - France MH - Germany MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000182943500032 L2 - binaries : general;circumstellar matter;stars : individual (HV Tauri);stars : pre-main-sequence;HERBIG-HARO FLOW; YOUNG STARS; CIRCUMSTELLAR DISK; INTERSTELLAR GRAINS; BINARY STARS; RADIO SURVEY; LOW-MASS; HH-30; ACCRETION; EVOLUTION SO - Astrophysical Journal 2003 ;589(1):410-418 9571 UI - 9223 AU - Starkov KE AD - IPN, CITEDI, Tijuana 22510, BC, MexicoStarkov, KE, IPN, CITEDI, 2498 Roll Dr 757, San Diego, CA 92173, USA TI - Observability conditions of linear time-varying systems and its computational complexity aspects AB - We propose necessary and sufficient observability conditions for linear time-varying systems with coefficients being time polynomials. These conditions are deduced from the Gabrielov-Khovansky theorem on multiplicity of a zero of a Noetherian function and the Wei-Norman formula for the representation of a solution of a linear time-varying system as a product of matrix exponentials. We define a Noetherian chain consisted of some finite number of usual exponentials corresponding to this system. Our results are formulated in terms of a Noetherian chain generated by these exponential functions and an upper bound of multiplicity of zero of one locally analytic function which is defined with help of the Wei-Norman formula. Relations with observability conditions of bilinear systems are discussed. The case of two-dimensional systems is examined MH - Mexico|Baja California MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 1024-123X UR - ISI:000180705200010 L2 - linear system;time-varying system;observability;matrix exponential;rank of a matrix;multiplicity of zero;computational complexity;CONTROLLABILITY SO - Mathematical Problems in Engineering 2003 ;8(4-5):439-449 9572 UI - 9012 AU - Steller DL AU - Riosmena-Rodriiguez R AU - Foster MS AU - Roberts CA AD - Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95064, USAUABCS, Program Invest Bot Marina, Dept Marine Biol, La Paz, MexicoMoss Landing Marine Labs, Moss Landing, CA 95039, USASteller, DL, Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95064 USA TI - Rhodolith bed diversity in the Gulf of California: the importance of rhodolith structure and consequences of disturbance AB - 1. Rhodolith beds, unattached coralline reefs, support a high diversity and abundance of marine species from both hard and soft benthos. We used surveys in multiple shallow (3-20m) beds in the Gulf of California to (1) examine seasonal patterns in associated floral and faunal diversity and abundance, (2) compare differences in faunal associations 'between rhodolith beds and adjacent sedimentary habitats, (3) examine the importance of complexity of rhodolith structure to community structure, and (4) estimate the impact of anthropogenic disturbance on rhodoliths and associated species. 2. Macroalgal richness was seasonal, and beds supported higher richness in winter (to 36 species) than summer (6-7 species), primarily due to foliose red algae. Strong seasonal variation in the abundance of dominant cover organisms was due to a shift from macroalgae and mat-forming colonial invertebrate species to microalgae. 3. The community in a rhodolith bed of high-density thalli (El Coyote average similar to11000 thalli/ m(-2)) had higher richness (52 versus 30 species) and abundance of epibenthic and crypto- and infaunal species compared with an adjacent sand community. Species diversity and abundance was particularly high for unique cryptofaunal organisms associated with rhodolith interstices. Cryptofauna reached average densities of 14.4 organisms/cm(-3) rhodolith, the majority of which were crustaceans, polychaetes and cnidarians along with rhodolith-specific chitons. 4. Results from sampling across a range of rhodolith morphs in the El Requeson bed (with lower average cryptofaunal densities of 2.3 organisms/cm(-3)) revealed that the total organisms supported by a rhodolith significantly increased with both complexity (branching density) and space available (thallus volume). These data suggest that reducing the population size structure, structural complexity and cover of living rhodoliths could decrease species richness and abundance. 5. While disturbance is a natural feature of these free-living beds, increased anthropogenic disturbance from trawling, anchoring and changes in water quality can directly impact the bed community through substrate alteration. Commercial fishing threatens rhodolith beds in the Gulf of California by decreasing rhodolith size and increasing sedimentation and burial rates. In addition to reducing direct destruction, conservation efforts should also focus on decreasing practices that breakdown thalli. Copyright (C) 2003 John Wiley Sons, Ltd MH - USA MH - Mexico|Baja California Sur PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 16 U4 - Environmental Sciences;Marine & Freshwater Biology;Water Resources U5 - J;Article AV - English IS - 1052-7613 UR - ISI:000181453100002 L2 - (8max);rhodolith;diversity;community structure;structural complexity;Gulf of California;Lithophyllum;maerl;benthic disturbance;OF-CALIFORNIA; BAHIA-CONCEPCION; BENTHIC COMMUNITY; MEXICO; BAY; CORALLINALES; ASSEMBLAGES; ENVIRONMENT; RHODOPHYTA; MORPHOLOGY SO - Aquatic Conservation-Marine and Freshwater Ecosystems 2003 ;13():S5-S20 9573 UI - 8431 AU - Stepanian JA AU - Benitez E AU - Krongold Y AU - Cruz-Gonzalez I AU - de Diego JA AU - Chavushyan V AU - Mujica R AU - Dultzin-Hacyan D AU - Verdugo T AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAInst Nacl Astrofis Opt & Elect, Puebla 7200, MexicoStepanian, JA, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - A multiwavelength study of narrow-line Seyfert 1 galaxies from the Second Byurakan Survey AB - In this work we present a multiwavelength study of narrow-line Seyfert 1 galaxies (NLS1s) discovered in the Second Byurakan Survey (SBS). The sample consists of 26 objects, which have M-B greater than or equal to -23.0, or -19.9>M-B>-23.0, 0.02431). The traditional linear correlation L-X and L-op, which seems to hold for active galactic nuclei in general, is found for SBS NLS1s. An anticorrelation between the FWHM of Hbeta and the ratio of Fe II lambda4570/Hbeta is also observed. A weak correlation is found between alpha(ox) slope and L-op. One of our main findings is that almost all SBS NLS1s may not have an FIR bump. Their spectral energy distribution suggests that they may also possess a big blue bump. The absence of an IR bump in most SBS NLS1s and the weakness of X-ray radiation in some of them may argue against the presence of a broad-line region. The surface density of SBS NLS1s is less than 0.015 deg(-2) (B<17.5; z<0.16) MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000182991900010 L2 - galaxies : active;galaxies : Seyfert;quasars : general;X-RAY PROPERTIES; ALL-SKY SURVEY; ACTIVE GALACTIC NUCLEI; SPECTRAL ENERGY-DISTRIBUTIONS; OPTICALLY SELECTED QUASARS; POINT-SOURCE CATALOG; WARM IRAS SOURCES; FE-II-EMISSION; COMPLETE SAMPLE; MARKARIAN GALAXIES SO - Astrophysical Journal 2003 ;588(2):746-762 9574 UI - 8626 AU - Sterck F AU - Martinez-Ramos M AU - Dyer-Leal G AU - Rodriguez-Velazquez J AU - Poorter L AD - Univ Wageningen, Forest Ecol & Forest Management Grp, Dept Environm Sci, NL-6700 AH Wageningen, NetherlandsUniv Nacl Autonoma Mexico, Dept Ecol Recursos Nat, Inst Ecol, Morelia 58089, Michoacan, MexicoUniv Utrecht, Dept Plant Sci, NL-3508 TB Utrecht, NetherlandsSterck, F, Univ Wageningen, Forest Ecol & Forest Management Grp, Dept Environm Sci, POB 342, NL-6700 AH Wageningen, Netherlands TI - The consequences of crown traits for the growth and survival of tree saplings in a Mexican lowland rainforest AB - 1. Many studies discuss the adaptive value of plant architecture, but few have actually measured architectural effects on plant growth and survival. In this study, sapling growth and survival are related to crown traits for two tree species, Trophis mexicana (Liebm.) Bur. and Pseudolmedia oxyphyllaria Donn. Sm., in the Los Tuxtlas lowland rainforest of Mexico. The traits investigated were crown width, crown depth, number of leaves, number of leaves per unit crown area (horizontal self-shading), and number of leaves per unit silhouette area (vertical self-shading). 2. Self-shading indices decreased with crown size, but were unaffected by the number of leaves per tree. Larger crowns thus had more diffuse foliage, with less self-shading. 3. The number of leaves had positive effects on growth and survival, while self-shading indices had no effect. This indicates that shaded leaves do not necessarily have negative carbon balances. 4. Negative effects of crown width on horizontal crown growth, and positive effects on vertical crown growth, suggest that saplings tend to grow towards a shape intermediate between the narrow and wide crown extremes. 5. Survival was positively correlated with crown width in Pseudolmedia , and with the number of leaves in Trophis . Apparently, dependence of survival on crown traits differed among species. 6. Crown traits affected plant growth and survival, but the hypothesis emerging from light-limited carbon acquisition was confounded by other factors, such as tree size and the inherent branching patterns. 7. Crown traits are good and rather simple predictors of future sapling growth and survival, and may help foresters to select potential crop trees MH - Mexico|Michoacan MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Ecology U5 - J;Article AV - English IS - 0269-8463 UR - ISI:000182457700006 L2 - canopy architecture;morphology;path analysis;performance;Pseudolmedia oxyphyllaria;Trophis mexicana;RAIN-FOREST TREES; UNDERSTORY PLANTS; LEAF DYNAMICS; LIGHT CAPTURE; CARBON GAIN; CANOPY GAPS; ARCHITECTURE; COMPENSATION; MORPHOLOGY; SEEDLINGS SO - Functional Ecology 2003 ;17(2):194-200 9575 UI - 6933 AU - Sterck FJ AU - Bongers F AU - During HJ AU - Martinez-Ramos M AU - De Kroon H AD - Univ Wageningen & Res Ctr, Forest Ecol & Forest Management Grp, NL-6700 AH Wageningen, NetherlandsUniv Utrecht, NL-3508 TB Utrecht, NetherlandsUniv Nacl Autonoma Mexico, Ctr Invest Ecosyst, Morelia 58190, Michoacan, MexicoCatholic Univ Nijmegen, NL-6525 ED Nijmegen, NetherlandsSterck, FJ, Univ Wageningen & Res Ctr, Forest Ecol & Forest Management Grp, POB 342, NL-6700 AH Wageningen, Netherlands TI - Module responses in a tropical forest tree analyzed with a matrix model AB - Module dynamics were studied for the shade-tolerant canopy tree species Vouacapoua americana in a French Guiana rain forest. A module life cycle graph was constructed, including all the possible transitions between four module states: apically growing (G), apically dormant (D), apically arrested (A), and branching (J). Transitions (module level) were translated to the module population growth rate lambda (tree level) and related to the variance in lambda among 18 different trees. This variance was also related to light availability (1-60% of ambient PAR) and tree height (5-30 m). Three module life cycle pathways (or loops) were dominant in their contributions to lambda: persistent apical dormancy (D-->D), biannual apical growth (G-->D-->G), and biannual branching by dormant modules (J-->D-->J). This suggests that biannual or even slower module production rates predominate in the module life cycle. The positive covariance between biannual loops seems the result of synchronization in apical and axillary activity. Slow production rates and synchronization allow trees to accumulate carbon, flush massively, and escape from herbivore attacks, and at the same time allow the tree to replace its leaves. The variance in lambda (V(lambda)) among trees was low. Apical trade-offs, which occur as one apical fate excludes other apical fates by definition, lead to negative covariances between apical growth and apical dormancy, and thus reduced the net contributions of the apical transitions to the variance in lambda among trees. Branching (D-->J) was independent of such trade-offs, was highly variable, increased with light availability, and almost fully accounted for V(lambda). Module fates and V(lambda) were unaffected by tree height. The module mechanisms underlie the rather invariable module population growth rate lambda in the shade, as well as the increasing lambda during higher light episodes, enabling shade-tolerant canopy trees to grow up and survive in a heterogeneous forest light environment MH - Mexico|Michoacan MH - Netherlands PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000186599300022 L2 - elasticity analysis;forest canopy;light response;loop analysis;modular growth;sympodial unit;tree architecture;tree development;up-scaling;variance decomposition analysis;Vouacapoua americana;CROWN DEVELOPMENT; RAIN-FOREST; STRUCTURAL DYNAMICS; LIGHT AVAILABILITY; POPULATION-GROWTH; BUD DEMOGRAPHY; LOOP ANALYSIS; SILVER BIRCH; PATTERNS; PLANTS SO - Ecology 2003 ;84(10):2751-2761 9576 UI - 6411 AU - Sterrenburg FAS AU - del Castillo MEM AU - Tiffany MA AD - Univ Autonoma Metropolitana Iztapalapa, Lab Fitoplancton Marino & Salobre, Mexico City 55535, DF, MexicoSan Diego State Univ, Ctr Inland Waters, San Diego, CA 92182, USADel Castillo, MEM, Westerstr 47, NL-1655 LC Sijbekarspel, Netherlands TI - Studies on the Genera Gyrosigma and Pleurosigma (Bacillariophyceae): Pleurosigma species in the plankton from the Pacific coast of Mexico, with the description of P-gracilitatis sp nov AB - Plankton samples from the Pacific coast of Mexico included some Pleurosigma species, of which three are particularly interesting: Pleurosigma ibericum Peragallo (typified here), P. distinguendum Hustedt, and a species fully matching all available data for Pleurosigma elongatum var. gracile Grunow. The latter diatom, here described as Pleurosigma gracilitatis sp. nov., cannot taxonomically be placed as, a variety of P. elongatum W Smith, as verified by a study of the type of the latter species. Its specimens were seen in various stages of valve morphogenesis. Type slide numbers are designated for Pleurosigma normanii Ralfs in Pritchard and P rhombeum (Grunow in Cleve et Grunow) H. Peragallo MH - Mexico|Distrito Federal MH - USA PB - PARIS: ADAC-CRYPTOGAMIE RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0181-1568 UR - ISI:000188397700001 L2 - diatoms;marine;microalgae;Pleurosignia elongatum;Pleurosigma gracilitatis sp nov.;Pleurosigma ibericum;species diversity;OCEAN SO - Cryptogamie Algologie 2003 ;24(4):291-306 9577 UI - 7541 AU - Stevens JA AU - Ivison RJ AU - Dunlop JS AU - Smail IR AU - Percival WJ AU - Hughes DH AU - Rottgering HJA AU - van Breugel WJM AU - Reuland M AD - Royal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Durham, Inst Computat Cosmol, Durham DH1 3LE, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoLeiden Observ, NL-2300 Leiden, NetherlandsLawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94459, USAStevens, JA, Royal Observ, Astron Technol Ctr, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - The formation of cluster elliptical galaxies as revealed by extensive star formation AB - The most massive galaxies in the present-day Universe are found to lie in the centres of rich clusters. They have old, coeval stellar populations suggesting that the bulk of their stars must have formed at early epochs in spectacular starbursts(1), which should be luminous phenomena when observed at submillimetre wavelengths(2). The most popular model of galaxy formation predicts that these galaxies formin proto-clusters at high-density peaks in the early Universe(3). Such peaks are indicated by massive high-redshift radio galaxies(4). Here we report deep submillimetre mapping of seven high-redshift radio galaxies and their environments. These data confirm not only the presence of spatially extended regions of massive star-formation activity in the radio galaxies themselves, but also in companion objects previously undetected at any wavelength. The prevalence, orientation, and inferred masses of these submillimetre companion galaxies suggest that we are witnessing the synchronous formation of the most luminous elliptical galaxies found today at the centres of rich clusters of galaxies MH - United Kingdom MH - Mexico|Puebla MH - Netherlands MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 48 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000185370900036 L2 - REDSHIFT RADIO GALAXIES; BLACK-HOLES; DUST; EMISSION; MERGERS; QUASARS; PROTOCLUSTER; ABSORPTION; ALIGNMENT; BULGES SO - Nature 2003 ;425(6955):264-267 9578 UI - 7537 AU - Stolte WC AU - Sant'Anna MM AU - Ohrwall G AU - Dominguez-Lopez I AU - Piancastelli MN AU - Lindle DW AD - Univ Nevada, Dept Chem, Las Vegas, NV 89154, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAPontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22452970 Rio De Janeiro, BrazilUppsala Univ, Dept Phys, SE-75121 Uppsala, SwedenCtr Natl Metrol, Qreretaro 76900, MexicoUniv Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, ItalyStolte, WC, Univ Nevada, Dept Chem, Las Vegas, NV 89154, USA TI - Photofragmentation dynamics of core-excited water by anion-yield spectroscopy AB - Partial-anion and- cation yields from H2O are presented for photon energies near the oxygen K edge. The O- yield exhibits a feature above threshold attributed to doubly excited states, in contrast to the H- and cation yields, which are nearly featureless above threshold. Additionally, the lack of the OH- fragment indicates radiative decay and provides a negligible amount of anion formation MH - Brazil MH - Italy MH - Mexico|Queretaro MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000185192100056 L2 - FAST DISSOCIATION; EXCITATION; FRAGMENTATION; OXYGEN; DECAY; CO2 SO - Physical Review A 2003 ;68(2): 9579 UI - 8842 AU - Stott R AU - May E AU - Ramirez E AU - Warren A AD - Univ Portsmouth, Dept Civil Engn, Portsmouth PO1 3QL, Hants, EnglandUniv Portsmouth, Sch Biol Sci, Portsmouth PO1 2DY, Hants, EnglandUniv Nacl Autonoma Mexico, FES Iztacala, Mexico City 04510, DF, MexicoNat Hist Museum, Dept Zool, London SW7 5BD, EnglandStott, R, Univ Portsmouth, Dept Civil Engn, Portsmouth PO1 3QL, Hants, England TI - Predation of Cryptosporidium oocysts by protozoa and rotifers: implications for water quality and public health AB - Predation by free-living protozoa and rotifers was investigated as a possible mechanism for the removal of Cryptosporidium parvum oocysts in aquatic ecosystems including wastewater treatment plants. Free-living ciliated protozoa (Stylonychia mytilus, Paramecium caudatum and an unidentified wastewater wetland ciliate), an amoeba (Acanthamoeba culbertsoni) and rotifers, all commonly found in aquatic ecosystems, were exposed to varying doses of C. parvum oocysts. All organisms investigated ingested oocysts. Predation activity and rates of ingestion varied with predator species and prey density. Ciliated protozoa demonstrated greater predation activity than A. culbertsoni or rotifers when exposed to 2 x 105 oocyst/mL for up to 3 h. Greatest predation after 1 h exposure was observed in P. caudatum, the largest ciliate, with on average 1.9 oocysts/cell (range 0-9 oocysts/cell). Stylonychia mytilus and the wetland ciliate had a similar mean ingestion of around 0.3 oocysts/cell, with numbers internalised ranging from 0-3 oocysts/cell. Rotifers ingested on average 1.6 oocysts/individual (range 0-7 oocysts/individual) whilst amoebae ingested on average 1.8 oocysts/cell after 2 h exposure (up to 3 oocysts/cell). Grazing activity by P. caudatum was demonstrated at a variety of prey levels ranging from 9 to 9,000 oocysts. Numbers of oocysts internalised by Paramecium frequently exceeded the reported human infective dose of 30 oocysts. In general, numbers of internalised oocysts increased with incubation time of up to 20-30 min although the rate of accumulation was slower at lower dose levels. The significance of predation on the fate of Cryptosporidium oocysts in the environment is discussed MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000181785000014 L2 - amoeba;ciliate;Cryptosporidium oocysts;predation;rotifers;PARVUM OOCYSTS; SURFACE WATERS; GIARDIA; CONTAMINATION; EFFLUENTS; FATE SO - Water Science and Technology 2003 ;47(3):77-83 9580 UI - 6517 AU - Strain JJ AU - Strain JJ AU - Mustafa S AU - Sultana K AU - Cartagena-Rochas A AU - Flores LRG AU - Smith G AU - Mayou R AU - Carvalho S AU - Chiu NM AU - Zimmermann P AU - Fragras R AU - Lyons J AU - Tsopolis N AU - Malt U AD - Mt Sinai Sch Med, New York, NY, USAEden Med Ctr, Castro Valley, CA, USANatl Med Ctr, Mexico City, DF, MexicoMonash Med Ctr, Clayton, Vic, AustraliaUniv Oxford, Sch Med, Oxford, EnglandClin Psychol, Hlth Sci Inst, Portuguese CL & Psychosmat Grp, Oporto, PortugalKashoing Sch Med, Kaohsiung, TaiwanKaohsiung Chang Gung Mem Hosp, Kaohsiung, TaiwanPorto Alegre Sch Med, Porto Alegre, RS, BrazilPorto Alegre Sch Med, Sao Paulo, BrazilUniv Sao Paulo, Sch Med, Natl Med Ctr, Sao Paulo, BrazilNW Sch Med, Chicago, IL, USAMt Sinai Med Ctr, New York, NY, USAUniv Oslo, Oslo, NorwayStrain, JJ, Mt Sinai Sch Med, New York, NY, USA TI - Part I: Consultation-Liaison Literature Database: 2003 update and national lists AB - Every day there are 10,000 scientific articles published. Since the Consultation-Liaison ("C-L") psychiatrist may be asked to consult on a patient with any medical illness, e.g., severe acute respiratory syndrome (SARS), malaria, cancer, stroke, amyotrophic lateral sclerosis, and a patient who may be on any medical drug, methods need to be developed to review the recent literature and have an awareness of key and essential current findings. At the same time, teachers need to develop a current listing of seminal papers for trainees and practitioners of this newest cross-over subspecialty of psychiatry-now called Psychosomatic Medicine. Experts selected because of their writings and acknowledged contributions to a specific clinical area or problem have examined thousands of citations to choose those articles, chapters, books, or letters that they regard as most important to Psychosomatic Medicine. In addition, psychiatric specialists in six countries have provided their national Psychosomatic Medicine (Consultation-Liaison) lists as examples of what they regard as the most important teaching materials from their national colleagues in their national journals: Australia, Brazil, Greece, Mexico, Portugal, and Taiwan. It is our belief that a cogent, international, systematic review will provide the greatest success in creating a "regionally-appropriate" teaching and consultation literature database with world-wide applicability. We review our current progress on this literature database and software, the technical system and data organization involved, the approach used to populate the literature system, and ongoing development plans to bring this system to the physician via mobile technologies. (C) Elsevier Inc MH - Australia MH - Brazil MH - United Kingdom MH - Mexico|Distrito Federal MH - Norway MH - Portugal MH - Taiwan MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Psychiatry U5 - J;Bibliography AV - English IS - 0163-8343 UR - ISI:000187890100001 SO - General Hospital Psychiatry 2003 ;25(6):378-478 9581 UI - 7494 AU - Strand V AU - Aranow C AU - Cardiel MH AU - arcon-Segovia D AU - Furie R AU - Sherrer Y AU - Tumlin J AU - Wallace DJ AU - Crawford B AD - Stanford Univ, Div Immunol, Palo Alto, CA 94304, USANew York Med Coll, Dept Med, Valhalla, NY 10595, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoN Shore Univ Hosp, Div Rheumatol Allergy & Clin Immunol, Manhasset, NY, USACtr Rheumatol Immunol & Arthrit Res, Ft Lauderdale, FL, USAEmory Univ, Sch Med, Dept Med, Atlanta, GA, USAUniv Calif Los Angeles, Sch Med, Cedars Sinai Med Ctr, Dept Med,Div Rheumatol, Los Angeles, CA, USAMAPI Values, USA, Boston, MA USAStrand, V, Vibeke Strand, 306 Ramona Rd, Portola Valley, CA 94028, USA TI - Improvement in health-related quality of life in systemic lupus erythematosus patients enrolled in a randomized clinical trial comparing LJP 394 treatment with placebo AB - In a 76-week, randomized controlled trial, patients received 100 mg LJP 394 or placebo weekly for 16 weeks followed by three 12-week treatment cycles of 50 mg LJP 394 or placebo weekly each separated by eight-week periods when no therapy was administered. Health-related quality of life (HRQOL) was assessed using SF-36 at baseline, 16 weeks and every 12 weeks thereafter. Analyses populations included intent to treat (ITT) (n = 179) and patients with high-affinity anti-dsDNA antibody binding (HA): 157/179; 85% active, 90% placebo. In the ITT population, there were improvements in role emotional (RE) (+7.3 versus -8.2), social functioning (SF) (+4.3 versus 0.7), and role physical (RP) (+11.3 versus 6.0) domains in the active treatment group when compared with placebo, with similar changes observed in the HA population. In 37 patients with data pre- and post-renal flares, those receiving LJP 394 reported stabilization or improvement in all but one domain compared with deterioration in all domains with placebo. Changes in RE domain scores following a flare differed by 22.7 points between the two treatment groups, favouring LJP 394 treatment. Patients receiving LJP 394 reported stable or improved HRQOL with active treatment following renal flares compared with deterioration in placebo. Differences between treatment groups in RE and SF domains are clinically important and were replicated irrespective of the protocol population analysed MH - Mexico|Distrito Federal MH - USA PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 30 U4 - Rheumatology U5 - J;Article AV - English IS - 0961-2033 UR - ISI:000185319900005 L2 - anti-dsDNA antibodies;health-related quality of life;SF-36;SLE;ANTI-DNA ANTIBODIES; RHEUMATOID-ARTHRITIS; DISEASE-ACTIVITY; MOS SF-36; ASSESSMENT QUESTIONNAIRE; CUMULATIVE DAMAGE; OSTEOARTHRITIS; ASSOCIATION; INDEX; INTERVENTION SO - Lupus 2003 ;12(9):677-686 9582 UI - 7583 AU - Su H AU - Balderas E AU - Vera-Estrella R AU - Golldack D AU - Quigley F AU - Zhao CS AU - Pantoja O AU - Bohnert JH AD - Univ Arizona, Dept Plant Sci, Tucson, AZ 85721, USAUniv Arizona, Dept Biochem, Tucson, AZ 85721, USAUniv Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62191, Morelos, MexicoUniv Bielefeld, Lehrstuhl Stoffwechselphysiol & Biochem Pflanzen, D-4800 Bielefeld, GermanyUniv Grenoble 1, CNRS, UMR 5575, Lab Genet Mol Plantes, Grenoble, FranceUniv Illinois, ERML 196, Dept Plant Biol, Urbana, IL 61801, USAUniv Illinois, ERML 196, Dept Crop Sci, Urbana, IL 61801, USABohnert, JH, Univ Arizona, Dept Plant Sci, Tucson, AZ 85721, USA TI - Expression of the cation transporter McHKT1 in a halophyte AB - From the ice plant, Mesembryanthemum crystallinum, McHKT1 was isolated encoding a protein 41-61% identical to other plant HKT1-like sequences previously described as potassium or sodium/potassium transporters. McHKT1 acts as a potassium transporter in yeast with specificity similar to that of wheat HKT1. In Xenopus oocytes it transports cations with a specificity Rb+>Cs+>[K+=Na+=Li+]. McHKT1 is exclusively localized to the plasma membrane. The isoform isolated is most highly expressed in leaves and is present in stems, flowers and seed pods but absent from the root where, according to immunological data, a second isoform exists which does not cross-hybridize with the leaf form in RNA blots at high stringency. McHKT1 transcript amounts increase during the first 6-10 h of stress and then decline to pre-stress levels with kinetics reminiscent of the initial influx of sodium into this halophyte. Immunocytological localization showed strong signals in the leaf vasculature and surrounding mesophyll cells but low-intensity signals are also detected in other cell types. In roots, McHKT is mainly confined to endodermis and stele. Possible functions of McHKT1 in ion homeostasis in the halophytic ice plant are discussed MH - France MH - Germany MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0167-4412 UR - ISI:000185028800005 L2 - gene expression;halophyte;HKT1 cation transporter;Mesembryanthemum crystallinum;protein localization;sodium transport;AFFINITY POTASSIUM TRANSPORTER; COMMON ICE PLANT; MESEMBRYANTHEMUM-CRYSTALLINUM; SALT TOLERANCE; K+ TRANSPORTER; SODIUM UPTAKE; EUCALYPTUS-CAMALDULENSIS; NA+/H+ ANTIPORTER; ARABIDOPSIS ROOTS; HKT TRANSPORTERS SO - Plant Molecular Biology 2003 ;52(5):967-980 9583 UI - 6576 AU - Suarez-Morales E AU - Reid JW AD - El Colegio Frontera Sur, ECOSUR, Chetumal 77000, Quintana Roo, MexicoVirginia Museum Nat Hist, Martinsville, VA 24112, USASuarez-Morales, E, El Colegio Frontera Sur, ECOSUR, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - An updated checklist of the continental copepod fauna of the Yucatan Peninsula, Mexico, with notes on its regional associations AB - The free-living continental copepod fauna of the Yucatan Peninsula has been studied for decades; recent intensive surveys suggest that its biodiversity is higher than formerly realized. An updated, revised checklist of the Yucatan copepods is provided herein. This new list includes 59 species, more a than 30% increase from the most recent previous account. The Yucatan Peninsula has long been considered to have faunistic affinities with Central and Southern Mexico and with South America. A similarity analysis was performed using regional records of Copepoda and including two taxa, the orders Calanoida and Cyclopoida. Results from both groups suggest that the Yucatan copepod fauna diverges from that of Central Mexico. Central Mexico itself seems to be closest to the upper Central American fauna, an affinity explained by a longer geological connection. Overall, the Yucatan copepod fauna appears to have more biogeographic ties with Cuba and the insular Caribbean than with Central America or the rest of Mexico. The occurrence of nearctic diaptomids such as Arctodiaptomus and Leptodiaptomus in the Yucatan seems to be related to a general invasion of these calanoids that reached Central America and intermittently spread into the Yucatan Peninsula. With two endemic species in the Yucatan, Mastigodiaptomus appears to have become diversified in the peninsula, derived from other neotropical forms. The local high proportion of endemic forms of Copepoda and the particular geological history of the Yucatan make this karstic area a peculiar, separate entity within the neotropical region that should be studied in more detail MH - Mexico|Quintana Roo MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000187808700005 L2 - FRESH-WATER; CYCLOPOID COPEPODS; SOUTHEASTERN MEXICO; CRUSTACEA; MESOCYCLOPS; CENOTES; CYCLOPIDAE; AMERICAN; RECORDS; GENUS SO - Crustaceana 2003 ;76():977-991 9584 UI - 8603 AU - Suarez-Morales E AU - Morales-Ramirez A AD - El Colegio Frontera Sur, Unidad Chetunal, Chetumal 77000, Quintana Roo, MexicoUniv Costa Rica, Escuela Biol, Ctr Invest Ciencias Mar & Limnol, San Jose 2060, Costa RicaSuarez-Morales, E, El Colegio Frontera Sur, Unidad Chetunal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - A new species of Cymbasoma (Crustacea : Copepoda : Monstrilloida) from the Pacific coast of Costa Rica, Central America AB - A new species of monstrilloid copepod belonging to the genus Cymbasoma Thompson is described from a female specimen collected in Bahia Culebra, an embayment on the Pacific coast of northwestern Costa Rica, in Central America. The new taxon, C. concepcionae, n.sp., is part of a group of species of Cymbasoma with a fifth leg represented by a single lobe armed with three setae. An overall comparison of this morphological group is presented. The new species is distinguished mainly by a combination of characters including a short inner seta on the fifth leg, a slightly globous genital double somite, and transverse cuticular striations nearly encircling the cephalic area. Moreover, the species can be easily recognized by a distinctive cluster of rounded cuticular processes on the middle ventral margin of the fifth pedigerous somite and on the anterior half of the genital double somite. The intercoxal sclerite of the first swimming leg shows a peculiar ornamentation not previously described within the group. This is the first record of a monstrilloid copepod species from marine waters of Costa Rica and of Central America, and the fourth species of Cymbasoma recorded from the Eastern Tropical Pacific MH - Costa Rica MH - Mexico|Quintana Roo PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000182529200015 SO - Proceedings of the Biological Society of Washington 2003 ;116(1):206-214 9585 UI - 8806 AU - Suarez-Morales E AU - Kim IH AU - Escamilla JB AD - ECOSUR, Quintana Roo 77000, MexicoKangreung Natl Univ, Dept Biol, Kangreung 210702, South KoreaITM, Merida 97310, MexicoSuarez-Morales, E, ECOSUR, AP 424, Quintana Roo 77000, Mexico TI - Illustrated record and complementary description of Caligus rufimaculatus Wilson (Copepoda : Siphonostomatoida) from Mexico MH - Mexico|Yucatan MH - Mexico|Quintana Roo MH - South Korea PB - MAYAGUEZ: UNIV PUERTO RICO, RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation U5 - J;Article AV - English IS - 0008-6452 UR - ISI:000182023300018 SO - Caribbean Journal of Science 2003 ;39(1):151-154 9586 UI - 7023 AU - Suarez-Tata LM AU - Quiroz-Mercado H AU - Guerrero-Naranjo J AU - Murillo-Lopez S AU - Reategui-Escalante G AU - Leizaola-Fernandez C AU - Garcia G AU - Morfin L AU - Charles S AD - Asoc Evitar Cegue, Mexico City, DF, MexicoUniv Tennessee, Dept Ophthalmol, Memphis, TN, USA TI - Vitrectomy using continuous infusion of oxygenated perfluorocarbons (ViCIOP) in patients with severe proliferative diabetic retinopathy and tractional retinal detachment. Anatomic and visual results MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607001461 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U420-U420 9587 UI - 7473 AU - Sudarsky D AU - Urrutia L AU - Vucetich H AD - Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoSudarsky, D, Penn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Bounds on stringy quantum gravity from low energy existing data AB - We show that existing low energy experiments, searching for the breaking of local Lorentz invariance, set bounds upon string theory inspired quantum gravity models that induce corrections to the propagation of fields. Using the standard observer Lorentz transformations in the D-particle recoil model we find Mgreater than or equal to12x10(5) M-P and vless than or equal to2x10(-27)c for the mass and recoil speed of the D particle, respectively. These bounds are similar to10(8) times stronger than the latest astrophysical bounds. These results indicate that the stringy scenario for modified dispersion relations is as vulnerable to these types of tests as the loop quantum gravity schemes MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000185229300043 L2 - LOCAL LORENTZ INVARIANCE; GAMMA-RAY BURSTS; SPATIAL ANISOTROPY; INERTIAL MASS; CPT VIOLATION; SEARCH; LIMITS; PHENOMENOLOGY; PROPAGATION; VELOCITY SO - Physical Review D 2003 ;68(2): 9588 UI - 9138 AU - Sudarsky D AU - Gonzalez JA AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPenn State Univ, Dept Phys, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USASudarsky, D, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Black hole scalar hair in asymptotically anti-de Sitter spacetimes AB - The unexpected discovery of hairy black hole solutions in theories with scalar fields simply by considering asymptotically anti-de Sitter (AdS) space, rather than asymptotically flat boundary conditions is analyzed in a way that exhibits in a clear manner the differences between the two situations. It is shown that the trivial Schwarzschild-anti-de Sitter space becomes unstable in some of these situations, and the possible relevance of this fact for the AdS conformal field theory conjecture is pointed out MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000181015700062 L2 - GRAVITATING SKYRMIONS; THEOREM; EQUATIONS SO - Physical Review D 2003 ;67(2): 9589 UI - 8175 AU - Suenaga K AU - Singh RP AU - Huerta-Espino J AU - William HM AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoINIFAP, Chapingo 56230, Mexico, MexicoSuenaga, K, JIRCAS, 1-1 Ohwashi, Tsukuba, Ibaraki 3058686, Japan TI - Microsatellite markers for genes Lr34/Yr18 and other quantitative trait loci for leaf rust and stripe rust resistance in bread wheat AB - Leaf rust and stripe rust. caused by Puccinia triticina and P. striiformis. respectively, are important diseases of wheat in many countries. In this study, we sought to identify molecular markers for adult plant resistance genes that could aid in incorporating such durable resistance into wheat. We used a doubled haploid population from a Japanese cv. Fukuho-komugi x Israeli wheat Oligoculm cross that had segregated for resistance to leaf rust and stripe rust in field trials. Joint and/or single-year analyses by composite interval mapping identified two quantitative trait loci (QTL) that reduced leaf rust severity and up to 11 and 7 QTLs that might have influenced stripe rust severity and infection type, respectively. Four common QTLs reduced stripe rust severity and infection type. Except for a QTL on chromosome 7DS, no common QTL for leaf rust and stripe rust was detected. QTL-7DS derived from 'Fukuho-komugi' had the largest effect on both leaf rust and stripe rust severities, possibly due to linked resistance genes Lr34/Yr18. The microsatellite locus Xgwin295.1, located almost at the peak of the likelihood ratio contours for both leaf and stripe rust severity, was closest to Lr34/Yr18. QTLs located on 1BL for leaf rust severity and 3BS for stripe rust infection type were derived from 'Oligoculm' and considered to be due to genes Lr46 and Yr30, respectively. Most of the remaining QTLs for stripe rust severity or infection type had smaller effects. Our results indicate there is significant diversity for genes that have minor effects on stripe rust resistance, and that successful detection of these QTLs by molecular markers should be helpful both for characterizing wheat genotypes effectively and combining such resistance genes MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 30 U4 - Plant Sciences U5 - J;Article AV - English IS - 0031-949X UR - ISI:000183692900015 L2 - slow rusting;Triticum aestivum;ADULT-PLANT RESISTANCE; F SP TRITICI; YELLOW RUST; PUCCINIA-STRIIFORMIS; MOLECULAR MARKERS; LR34; IDENTIFICATION; ASSOCIATION; CULTIVARS; MAP SO - Phytopathology 2003 ;93(7):881-890 9590 UI - 8099 AU - Sugihara K AU - Nakamori T AU - Iryu Y AU - Sasaki K AU - Blanchon P AD - Fukuoka Univ, Fac Sci, Dept Earth Syst Sci, Fukuoka 8140180, JapanTohoku Univ, Grad Sch Sci, Inst Geol & Palaeontol, Sendai, Miyagi 9808578, JapanKanazawa Gakuin Univ, Fac Fine Arts & Informat, Dept Cultural Properties & Heritage, Kanazawa, Ishikawa 9201392, JapanNatl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Reef Syst Unit, Cancun 77500, Q Roo, MexicoSugihara, K, Fukuoka Univ, Fac Sci, Dept Earth Syst Sci, Fukuoka 8140180, Japan TI - Holocene sea-level change and tectonic uplift deduced from raised reef terraces, Kikai-jima, Ryukyu Islands, Japan AB - Kikai-jima (Kikai Island) is surrounded by four Holocene raised coral reef terraces, which are thought to be an offlapping sequence of reef deposits caused by combined effects of seismic uplift and Holocene sea-level change. Many studies in this region have investigated Holocene sea-level changes and reef growth, but there are relatively few in which reliable sea-level indicators are given. We have found that Pocillopora verrucosa, one of the most abundant coral species on the upper-reef slopes of fringing reefs in the Ryukyus, has its peak abundance at a depth of 1.5 in. Therefore, this species is considered ideal for the analysis of relative sea-level change and can be used as a dipstick for the Holocene reef deposits in this area. Based on the distribution of P verrucosa on the four Holocene raised terraces, we calculate relative paleo-mean sea levels to be 10.8-11.1 and 8.5-8.9 in for Terrace I, 5.0-5.3 in for Terrace II, 4.0-4.3 m for Terrace III and 1.9-2.5 in for Terrace IV. These results, combined with hitherto known and newly measured radiometric dates (103 total), clearly show that the four terraces formed in response to repeated seismic uplifts at 6.3, 4.1, 3.1 and 1.4 ka, and that sea level was higher than present between 7.0 and 6.3 ka. (C) 2003 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Quintana Roo PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000183778900002 L2 - coral reef;scleractinian corals;relative sea level;earthquake;C-14 DATA; CORALS; TIME; MODEL; AGE SO - Sedimentary Geology 2003 ;159(1-2):5-25 9591 UI - 7193 AU - Sulentic JW AU - Zamfir S AU - Marziani P AU - Bachev R AU - Calvani M AU - Dultzin-Hacyan D AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAOsserv Astron Padova, I-35122 Padua, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSulentic, JW, Univ Alabama, Dept Phys & Astron, Box 870324,206 Gallalee Hall, Tuscaloosa, AL 35487 USA TI - Radio-loud active galactic nuclei in the context of the eigenvector 1 parameter space AB - We consider the properties of radio-loud (RL) active galactic nuclei in the context of the eigenvector 1 (E1) parameter space. RL sources show a restricted E1 parameter space occupation relative to the radio-quiet (RQ) majority. The Fanaroff-Riley II "parent population" of relatively unboosted RL sources (median radio/optical flux ratio similar to490) shows the most restricted occupation. RL sources have different broad-line properties (and inferred black hole masses and Eddington ratios). FWHM Hbeta for the broad-line component in RL sources are at least twice as large as in the RQ majority. The average broad Fe II lambda4570 emission-line strength is also about half that for RQ sources. Our sample suggests that the RL cutoff occurs near R-K approximate to 70 or log P-6 cm similar to ergs s(-1) Hz(-1). Sources below this cutoff are RQ, although we cannot rule out the existence of a distinct intermediate population. We show that the Doppler-boosted core-dominated RL sources (median flux ratio similar to1000) lie toward smaller FWHM(Hbeta(BC)) and stronger Fe IIopt in E1, as expected if the lines arise in an accretion disk. Our subsample of superluminal sources, with orientation inferred from the synchrotron self-Compton model, reinforce this general E1 trend and allow us to estimate the role of source orientation in driving E1 domain occupation MH - USA MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186171700005 L2 - galaxies : active;quasars : emission lines;quasars : general;NARROW-LINE SEYFERT-1; BRIGHT QUASAR SURVEY; QUIET QUASARS; EMISSION-LINES; GALAXIES; ATLAS SO - Astrophysical Journal 2003 ;597(1):L17-L20 9592 UI - 8902 AU - Sun LD AU - Hohage M AU - Zeppenfeld P AU - Balderas-Navarro RE AU - Hingerl K AD - Johannes Kepler Univ, Inst Expt Phys, A-4040 Linz, AustriaUniv Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, MexicoUniv Autonoma San Luis Potosi, IICO, San Luis Potosi 78000, MexicoJohannes Kepler Univ, Christian Doppler Lab Oberflachenopt, A-4040 Linz, AustriaZeppenfeld, P, Johannes Kepler Univ, Inst Expt Phys, Altenberger Str 69, A-4040 Linz, Austria TI - Surface-induced d-band anisotropy on Cu(110) AB - Reflectance difference spectroscopy (RDS) was used to study the surface-induced anisotropy of the electronic band structure on Cu(110) in the energy range between 3 and 5.5 eV. The spectral features in this energy range can be well reproduced by approximating surface dielectric anisotropy by the first derivative of the known bulk dielectric function. In contrast to the conventional 'derivative model', however, the different sensitivity to the relevant Cu d-bands to the surface anisotropy has to be respected. The results can be rationalized in a tight-binding picture relating the shift of the surface projected d-bands to the different atomic densities along the in-plane [001] and [110] directions, respectively. As a confirmation, the temperature dependence of the RDS features was measured and found to be in good agreement with the thermal shifts of the associated optical transitions. (C) 2003 Elsevier Science B.V. All rights reserved MH - Austria MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000181571000004 L2 - surface electronic phenomena (work function;surface potential, surface states, etc.);reflection spectroscopy;copper;low index single crystal surfaces;REFLECTANCE-DIFFERENCE SPECTROSCOPY; OPTICAL-PROPERTIES; COPPER; TEMPERATURE; AU; CU SO - Surface Science 2003 ;527(1-3):L184-L190 9593 UI - 9473 AU - Svanbro A AU - Huntley JM AU - Davila A AD - Lulea Univ Technol, Div Expt Mech, S-97187 Lulea, SwedenUniv Loughborough, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, EnglandCtr Invest Opt, Leon 37150, Gto, MexicoSvanbro, A, Lulea Univ Technol, Div Expt Mech, S-97187 Lulea, Sweden TI - Optimal re-referencing rate for in-plane dynamic speckle interferometry AB - We investigate experimentally the optimal rate at which the reference speckle pattern should be updated when dynamic speckle interferometry is used to measure transient in-plane displacement fields. Images are captured with a high-speed camera and phase shifting and phase unwrapping are done temporally. For a wide range of in-plane velocities, up to a maximum of 40% of the Nyquist limit, the random errors in the calculated displacement field are minimized by updating the reference speckle pattern after a speckle displacement of 1/10 of the pixel spacing. The technique is applied to measurements of microscale deformation fields within an adhesive joint in a carbon-fiber epoxy composite. (C) 2003 Optical Society of America MH - United Kingdom MH - Mexico|Guanajuato MH - Sweden PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000180232000009 L2 - PATTERN INTERFEROMETRY SO - Applied Optics 2003 ;42(2):251-258 9594 UI - 8381 AU - Svirid V AU - Khotiaintsev S AU - Swart PL AD - Natl Autonomous Univ Mexico, Fac Engn, Mexico City 04510, DF, MexicoRand Afrikaans Univ, Fac Engn, ZA-2006 Auckland Pk 2006, South AfricaSvirid, V, Natl Autonomous Univ Mexico, Fac Engn, Mexico City 04510, DF, Mexico TI - Linear and steplike characteristics in an optical fiber refractometric transducer with hemispherical detection element AB - We present the results of a theoretical numerical analysis of transmission characteristics of a fiber optic refractometric transducer with a hemispherical glass detection element. In this transducer, the internal reflection of light from the element's spherical surface depends on the refractive index of the surrounding medium. We examine the effects of the transducer's geometrical and optical parameters and its refractive index on the transmission function, its nonlinearity, and the transducer's sensitivity to the refractive index of the surrounding medium. We show that through a proper choice of the transducer's material and geometrical parameters, it is possible to obtain a transmission function of any necessary span over a wide interval of the refractive index of the surrounding medium (from n = 1.0 to 1.7), and to modify the form of the transmission function from a linear one to a steplike one in virtually the same device. This permits us to use the proposed transducer for two contrasting applications: assessing the refractive index, and discriminating between two liquids or between air and a liquid, as in the detection of liquids, level measurement, etc. In addition, it is possible to adjust the transducer input range to the refractive index of a particular fluid (or fluids) of interest. (C) 2003 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Distrito Federal MH - South Africa PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000182985900030 L2 - optical fiber sensors;refractometry;fluid detection;liquid-level measurement SO - Optical Engineering 2003 ;42(5):1383-1389 9595 UI - 7059 AU - Swanson WF AU - Johnson WE AU - Cambre RC AU - Citino SB AU - Ouigley KB AU - Brousset DM AU - Morals RN AU - Moreira N AU - O'Brien SJ AU - Wildt DE AD - Cincinnati Zoo & Bot Garden, Ctr Conservat & Res Endangered Wildlife, Cincinnati, OH 45220, USANCI, Lab Genom Divers, Frederick, MD 21701, USASmithsonian Natl Zool Pk, Conservat & Res Ctr, Washington, DC, USAWhite Oak Conservat Ctr, Yulee, FL, USAHornocker Wildlife Res Inst, Moscow, ID, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zootech, Coyoacan, MexicoUniv Fed Parana, Setor Ciencias Biol, BR-80060000 Curitiba, Parana, BrazilUniv Fed Parana, Curso Med Vet, Palotina, BrazilNCI, Lab Genom Divers, Frederick, MD 21701, USASwanson, WF, Cincinnati Zoo & Bot Garden, Ctr Conservat & Res Endangered Wildlife, 3400 Vine St, Cincinnati, OH 45220 USA TI - Reproductive status of endemic felid species in Latin American zoos and implications for ex situ conservation AB - Reproductive evaluations were conducted on 185 male cats representing eight endemic Latin American species that were maintained in 44 zoos and private facilities in 12 Latin American countries. Reproductive assessments (testicular measures, ejaculate quality, and blood testosterone/cortisol concentration) were used to establish normative values for large- and small-sized cats in Latin American collections. Data also were analyzed using multiple regression to study the impact of proven breeder status, diet, and various animal housing combinations. Most felids (>95%) in the survey were of wild-born origin, and <20% had produced offspring in captivity. Larger felids had bigger testes and produced more semen, but tended to produce low-sperm-density ejaculates. The ejaculates of small felids were more sperm-concentrated, but contained fewer total spermatozoa. Sperm motility was unrelated to species size, and certain species (puma, margay, tigrina, and jaguarundi) consistently produced few (<40%) normal sperm forms. Across species, >50% of males had low sperm counts (< 1 million total sperm per ejaculate). Among large cats (jaguars and pumas), proven breeders had larger (P<0.05) testes, greater semen volume, and more normal sperm than nonbreeders. Males on adequate diets had higher (P<0.05) circulating cortisol. Among small-sized felids, proven breeders had higher (P<0.05) testosterone, and males housed alone or paired with a conspecific female had more (P<0.05) total sperm per ejaculate and greater (P<0.05) seminal and testicular volumes. Fifty-nine ejaculates (potentially representing similar to 100 artificial insemination (AI) or 26,000 in vitro fertilization (IVF) procedures) were cryopreserved for a felid genome resource bank. In conclusion, breeding success and reproductive traits for many endemic felids in Latin American zoos appear to be suboptimal, and likely would benefit from improvements in diet and exhibitry. Technology transfer and continued training of zoo staff and scientists in Latin American countries are essential if these zoos are to achieve their tremendous conservation potential for felids and other threatened endemic species MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 14 U4 - Veterinary Sciences;Zoology U5 - J;Article AV - English IS - 0733-3188 UR - ISI:000186305800001 L2 - electroejaculation;semen;cats;breeding;testosterone;cortisol;nutrition;exhibitry;cryopreservation;LAPAROSCOPIC ARTIFICIAL-INSEMINATION; JAGUARS PANTHERA-ONCA; DOMESTIC CAT; PHYLOGEOGRAPHIC PATTERNS; MITOCHONDRIAL-DNA; ENDANGERED FELIDS; PUMA; CONCOLOR; SPERMATOZOA; RESPONSES SO - Zoo Biology 2003 ;22(5):421-441 9596 UI - 8959 AU - Swart PL AU - Chtcherbakov AA AU - Joubert WL AU - Shlyagin MG AD - Rand Afrikaans Univ, Ctr Opt Commun & Sensors, ZA-2006 Auckland Pk, South AfricaCICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoSwart, PL, Rand Afrikaans Univ, Ctr Opt Commun & Sensors, POB 524, ZA-2006 Auckland Pk, South Africa TI - Study of the pressure dependence of hydrogen diffusion in optical fiber by an interferometric technique AB - This paper presents a novel technique for measuring the pressure- and time-dependent concentration of hydrogen in optical fiber during isothermal hydrogen loading to increase its photosensitivity. A low-finesse fiber Bragg grating Fabry-Perot interferometer allows the determination of the evolution of the hydrogen concentration in situ. Experimental results obtained for isothermal diffusion at 75 degreesC and at fixed pressures ranging from 53 to 150 bar confirmed the assumption of physical diffusion at temperatures commonly used for hydrogen loading of optical fiber. The estimated resolution of the new technique is better than 10 ppm for a 10 mm long interferometer. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - South Africa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000181366000024 L2 - optical fiber;hydrogen;diffusion;refractive index;Bragg gratings;Fabry-Perot interferometer;silica;STATIC STRAIN-MEASUREMENT; FABRY-PEROT SENSOR; GERMANOSILICATE FIBERS; UV PHOTOSENSITIVITY; SILICA; H-2; FABRICATION; SOLUBILITY; RESOLUTION; BORON SO - Optics Communications 2003 ;217(1-6):189-196 9597 UI - 7870 AU - Sytnikov VE AU - Dolgosheev PI AU - Soloviev MG AU - Belij DI AU - Nieto L AU - Perez A AU - Gonzalez A AU - Maya M AU - Ortiz F AU - Falcony C AU - Jergel M AU - Morales A AD - JSC VNIIKP, Cable Inst, Moscow 111024, RussiaCABIX, Moscow, RussiaCIDEC, Mexico City, DF, MexicoCINVESTAV, IPN, Dept Fis, Mexico City, DF, MexicoSytnikov, VE, JSC VNIIKP, Cable Inst, Moscow 111024, Russia TI - The current test results for two models of HTS cables on CASAT project AB - Two models of HTS power cables were made and tested. The cable of Nordic Superconductor Technology (NST, Denmark) tape has 4 layers and length of I m, and the cable of Vacuum-schmelzc (VAC, Germany) tape has 6 layers and length of 5 m. The test of the cables was performed at currents up to 6 kA (AC) and 10 kA (DC). Temperature was 78 K, uniform along the models' length. The critical current was more than 10 kA for 6 layers cable at 78 K. Main attention was paid for current distribution study in the cable models. Measurements of the current distribution between layers showed uniform current distribution and high level of superconducting tapes current currying capacity utilization. The comparison of the experimental and theoretical results showed reasonable coincidence. The tests will be continued at a various temperatures up to 100 K MH - Mexico|Distrito Federal MH - Russia PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 1051-8223 UR - ISI:000184241900185 L2 - high temperature superconductors;superconducting power cables SO - Ieee Transactions on Applied Superconductivity 2003 ;13(2):1964-1967 9598 UI - 9348 AU - Szafranski W AU - Cukier A AU - Ramirez A AU - Menga G AU - Sansores R AU - Nahabedian S AU - Peterson S AU - Olsson H AD - AstraZeneca R&D Lund, SE-22187 Lund, SwedenVoivodeship Specialist Hosp, Dept Lung Dis, Radom, PolandUniv Sao Paulo, Hosp Clin Barcelona, Div Resp Dis, Sao Paulo, BrazilHosp Enfermedades Cardiovasc & Torax, Monterrey, MexicoHosp Maria Ferrer, Dept Pneumol, Buenos Aires, DF, ArgentinaInst Nacl Enfermedades Resp, Dept Res Tobacco Smoking, Mexico City, DF, MexicoInst Nacl Enfermedades Resp, COPD, Mexico City, DF, MexicoHosp Evita Lanus, Buenos Aires, DF, ArgentinaOlsson, H, AstraZeneca R&D Lund, SE-22187 Lund, Sweden TI - Efficacy and safety of budesonide/formoterol in the management of chronic obstructive pulmonary disease AB - The efficacy and safety of budesonide/formoterol in a single inhaler compared with placebo, budesonide and formoterol were evaluated in patients with moderate-to-severe chronic obstructive pulmonary disease (COPD). In a 12-month, randomised, double-blind, placebo-controlled, parallel-group study in 812 adults (mean age 64 yrs, mean forced expiratory volume in one second (FEV1) 36% predicted normal), patients received two inhalations twice daily of either budesonide/formoterol (Symbicort(R)) 160/4.5 mug (delivered dose), budesonide 200 mug (metered dose), formoterol 4.5 mug or placebo. Severe exacerbations and FEV1 (primary variables), peak expiratory flow (PEF), COPD symptoms, health-related quality 4 life (HRQL), mild exacerbations, use of reliever beta(2)-agonist and safety variables were recorded. Budesonide/formoterol reduced the mean number of severe exacerbations per patient per year by 24% versus placebo and 23% versus formoterol. FEV1 increased by 15% versus placebo and 9% versus budesonide. Morning PEF improved significantly on day 1 versus placebo and budesonide; after 1 week, morning PEF was improved versus placebo, budesonide and formoterol. Improvements in morning and evening PEF versus comparators were maintained over 12 months. Budesonide/formoterol decreased all symptom scores and use of reliever beta(2)-agonists significantly versus placebo and budesonide, and improved HRQL versus placebo. All treatments were well tolerated. These results suggest a role for budesonide/formoterol in the long-term management of moderate-to-severe chronic obstructive pulmonary disease MH - Argentina MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Poland MH - Sweden PB - SHEFFIELD: EUROPEAN RESPIRATORY SOC JOURNALS LTD RP - NOT IN FILE U3 - TC 190 U4 - Respiratory System U5 - J;Article AV - English IS - 0903-1936 UR - ISI:000180593200013 L2 - budesonide;budesonide/formoterol;chronic obstructive pulmonary disease exacerbations;formoterol;QUALITY-OF-LIFE; FLUTICASONE PROPIONATE; AIRWAY INFLAMMATION; INHALED BUDESONIDE; SMOKING CESSATION; LUNG HEALTH; FORMOTEROL; COPD; SALMETEROL; TRIAL SO - European Respiratory Journal 2003 ;21(1):74-81 9599 UI - 7520 AU - Szentgyorgyi A AU - Raymond J AU - Franco J AU - Villaver E AU - Lopez-Martin L AD - Smithsonian Astrophys Observ, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSpace Telescope Sci Inst, Baltimore, MD 21218, USADEMIRM, Observ Paris, F-75014 Paris, FranceSzentgyorgyi, A, Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA TI - The high-excitation planetary nebula NGC 246: Optical and near-ultraviolet observations and two-dimensional numerical models AB - We have imaged the planetary nebula ( PN) NGC 246 in the near- ultraviolet wavelengths [ Ne v] 342.6 nm, the Bowen fluorescence line of O iii at 344.4 nm, and a nearby line- free region centered on 338.6 nm, as well as Halpha, [ O iii] 500.7 nm, and [ S ii] 673.0 and 671.5 nm. Imaging in the 344.4 nm line is necessary to deconvolve contamination of the [ Ne v] images by O iii 342.9 nm. The emission from the shell and inner parts of the nebula is detected in [ Ne v]. The radial profiles of the [ Ne v] brightness decrease with radius from the exciting star, indicating that the bulk of the emission from this ion is due to the hard UV stellar radiation field, with a ( probably) marginal contribution from collisional ionization in a shock between the PN shell and the interstellar medium ( ISM). In contrast, the radial profiles of the emission in Halpha, [ O iii] 500.7 nm, and [ S ii] are flatter and peak at the location of the shell. The emission of [ S ii] probably traces the interaction of the PN with the ambient ISM. We also present two- dimensional numerical simulations for this PN- ISM interaction. The simulations consider the stellar motion with respect to the ambient ISM, with a velocity of 85 km s(-1), and include the time evolution of the wind parameters and UV radiation field from the progenitor star MH - France MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000185257600017 L2 - circumstellar matter;hydrodynamics;ISM : kinematics and dynamics planetary nebulae : individual (NGC 246);INTERMEDIATE-MASS STARS; ASYMPTOTIC GIANT BRANCH; X-RAY OBSERVATIONS; H-II REGIONS; MAGNETIC-FIELDS; INTERSTELLAR BUBBLES; DYNAMICAL EVOLUTION; ROSAT OBSERVATIONS; CIRCUMSTELLAR GAS; GALACTIC DISK SO - Astrophysical Journal 2003 ;594(2):874-887 9600 UI - 8792 AU - Sznaier M AU - Suarez R AU - Cloutier J AD - Penn State Univ, Dept Elect Engn, University Pk, PA 16802, USAUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Mexico City 09000, DF, Mexico, USAF, Navigat & Control Branch, Res Lab, Eglin AFB, FL 32542 USASznaier, M, Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA TI - Suboptimal control of constrained nonlinear systems via receding horizon constrained control Lyapunov functions AB - In this paper we propose a new controller design method, based on the combination of receding horizon and control Lyapunov functions, for nonlinear systems subject to input constraints. The main result shows that this control law renders the origin an asymptotically stable equilibrium point in the entire region where stabilization with constrained controls is feasible, while, at the same time, achieving near-optimal performance. Contrary to other approaches, the proposed controller does not require forcing the trajectory at the end of the prediction horizon to lie in a region where the constraints are not binding, allowing for the use of (potentially substantially) smaller horizons in the optimization. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - USA PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000182004200005 L2 - constrained control;control Lyapunov function;receding horizon;MODEL-PREDICTIVE CONTROL; LINEAR-SYSTEMS; STABILIZATION; STABILITY; OPTIMALITY SO - International Journal of Robust and Nonlinear Control 2003 ;13(3-4):247-259 9601 UI - 7432 AU - Tabata T AU - Ogura T AD - Kobe Womens Univ Seto Jr Coll, Okayama 7090863, JapanUniv Autonoma Guadalajara, CEN, Dept Quim, Guadalajara, Jalisco, MexicoTabata, T, Kobe Womens Univ Seto Jr Coll, 721 Kannonji, Okayama 7090863, Japan TI - Absorption of calcium and magnesium to the fruit body of Aragekikurage (Auricularia polytricha (Mont.) Sacc.) from sawdust culture media supplemented with calcium and magnesium salts AB - Auricularia polytricha was incubated in potato-sucrose-agar (PSA) and in a sawdust medium supplemented with Ca or Mg salts. The mycelia grew well on the PSA supplemented with Ca sulfate, Ca phosphate, Mg sulfate and Mg chloride. On sawdust medium, the supplementation with Ca phosphate, Ca carbonate, Mg sulfate or Mg carbonate resulted in good mycelial growth. The Ca content of fruit body grown on the sawdust medium was increased 1.1-1.5 times by supplementation of 1-5% of Ca phosphate or Ca carbonate. The Mg content was increased 1.7-2.2 times by 0.5% of Mg carbonate, Mg hydroxide, Mg sulfate and Mg chloride MH - Japan MH - Mexico|Jalisco PB - IBARAKI-KEN: JAPAN SOC FOOD SCI TECHNOL RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1344-6606 UR - ISI:000185549000008 L2 - Aragekikurage (Auricularia polytricha);mycelial growth;Mg-Ca-supplementation;Mg-Ca-absorption;MINERAL BINDING-CAPACITY; FIBER SOURCES; MUSHROOMS; COMPONENTS; CA; CU; ZN; MG SO - Food Science and Technology Research 2003 ;9(3):250-253 9602 UI - 9095 AU - Tabata T AU - Ogura T AD - Kobe Womens Univ, Seto Junior Coll, Seto, Okayama 7090863, JapanUniv Autonoma Guadalajara, Dept Quim, CEN, Guadalajara, Jalisco, MexicoTabata, T, Kobe Womens Univ, Seto Junior Coll, 721 Kannonji, Seto, Okayama 7090863, Japan TI - Absorption of calcium and magnesium by the fruiting body of the cultivated mushroom Hypsizigus marmoreus (Peck) bigelow from sawdust culture media AB - Hypsizigus marmoreus was cultivated in potato-sucrose-agar (PSA) and in sawdust media supplemented with Ca or Mg salts. The radial growth of mycelia was determined. The mushroom spawn did not grow on PSA supplemented with Ca carbonate, Mg carbonate, or Mg hydroxide. However, the mycelia grew well on sawdust media supplemented with Ca phosphate, Ca carbonate, or Mg sulfate. Ca of the fruiting body was increased 4.0 to 5.6 times by 1% to 5% of Ca phosphate or Ca carbonate. Mg was increased 1.4 times by 0.5% of Mg sulfate or Mg chloride MH - Japan MH - Mexico|Jalisco PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000181049300013 L2 - Hypsizigus marmoreus mushrooms;calcium;magnesium;absorption;BOMBARDMENT MASS-SPECTROMETRY; MINERAL BINDING-CAPACITY; FIBER SOURCES; ANTIOXIDANT ACTIVITIES; STEROL CONSTITUENTS; STRUCTURAL-ANALYSES; EDIBLE MUSHROOMS; RICE BRAN; MICE; CA SO - Journal of Food Science 2003 ;68(1):76-79 9603 UI - 8543 AU - Tadin-Strapps M AU - Salas-Alanis JC AU - Moreno L AU - Warburton D AU - Martinez-Mir A AU - Christiano AM AD - Columbia Univ Coll Phys & Surg, Dept Dermatol, New York, NY 10032, USAColumbia Univ, Dept Genet & Dev, New York, NY 10032, USAColumbia Univ, Dept Pediat, New York, NY 10032, USAUniv Autonoma Nuevo Leon, Med Serv, Monterrey, MexicoChristiano, AM, Columbia Univ Coll Phys & Surg, Dept Dermatol, 630 W 168th St VC15-216, New York, NY 10032 USA TI - Congenital universal hypertrichosis with deafness and dental anomalies inherited as an X-linked trait AB - We report a large Mexican kindred with a variant form of congenital universal hypertrichosis that is inherited in an apparent X-linked. recessive manner. In addition to the generalized hypertrichosis, the affected individuals have dental malformations and deafness. Males are more severely affected than females who exhibit only mild hypertrichosis, but not deafness or dental anomalies. Haplotype analysis in this pedigree revealed linkage to a 13-cM region on chromosome Xq24-q27.1 between markers GATA198A10 and DXS8106. Localization of the gene underlying this form of hypertrichosis is the initial step in identifying genes on the X chromosome that are involved in the control of hair growth and development MH - Mexico|Nuevo Leon MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 2 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0009-9163 UR - ISI:000182778800015 L2 - chromosome X;deafness;dental anomalies;hair follicle;hypertrichosis;HAIR-FOLLICLES; EXPRESSION; GROWTH; GENE SO - Clinical Genetics 2003 ;63(5):418-422 9604 UI - 8505 AU - Talaue-McManus L AU - Smith SV AU - Buddemeier RW AD - Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Affairs, Miami, FL 33149, USACICESE, Dept Ecol, Ensenada, Baja California, MexicoKansas Geol Survey, Lawrence, KS 66044, USATalaue-McManus, L, Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Affairs, 4600 Rickenbacker Causeway, Miami, FL 33149 USA TI - Biophysical and socio-economic assessments of the coastal zone: the LOICZ approach AB - The Land-Ocean Interactions in the Coastal Zone Project of the International Geosphere-Biosphere Programme focused on quantifying the role of the global coastal zone in the cycling of carbon and nutrients. From 1993 to date, it has developed protocols and tools that allow for site-specific and global assessments of coastal processes and their drivers. Indicators used in coastal assessments include the contribution of population and economic activities to waste load generation, and the resulting coastal system states relative to net production and nitrogen cycling. (C) 2003 Elsevier Science Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000182799800008 L2 - MISSISSIPPI RIVER; HYPOXIA SO - Ocean & Coastal Management 2003 ;46(3-4):323-333 9605 UI - 8616 AU - Talcott ST AU - Brenes CH AU - Pires DM AU - del Pozo-Insfran D AD - Univ Florida, Dept Food Sci & Human Nutr, Gainesville, FL 32611, USAITESM, Dept Food Technol, Monterrey 64849, NL, MexicoTalcott, ST, Univ Florida, Dept Food Sci & Human Nutr, POB 110370, Gainesville, FL 32611 USA TI - Phytochemical stability and color retention of copigmented and processed muscadine grape juice AB - Muscadine (Vitis rotundifolia) grape juice was assessed for color and phytochemical stability as influenced by anthocyanin copigmentation with a water-soluble rosemary extract, fortification with ascorbic acid, and processing by heat or high hydrostatic pressure (HHP). The roles of polyphenolic cofactors in the presence and in the absence of ascorbic acid were assessed as a means to improve the overall processing stability of the juice. Addition of rosemary extract from 0 to 0.4% (v/v) readily formed copigment complexes with anthocyanins and resulted in concentration-dependent hyperchromic shifts from 10 to 27% that corresponded to increased antioxidant activity. The presence of ascorbic acid was generally detrimental to juice quality, especially in the presence of rosemary extract, and resulted in overall anthocyanin, ascorbic acid, and antioxidant activity losses. Although thermal and high-pressure processing methods were detrimental to juice quality, HHP resulted in greater losses after processing, likely due to action from residual oxidase enzymes. Although physicochemical attributes were enhanced by copigmentation with rosemary extract, methods to inactivate residual enzymes should be addressed prior to copigmentation to prevent degradation of anthocyanins in the presence of ascorbic acid MH - USA MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000182533200021 L2 - muscadine;copigment;high pressure;ascorbic acid;anthocyanin;polyphenol oxidase;BLUEBERRY POLYPHENOL OXIDASE; HIGH-PRESSURE; ELLAGIC ACID; ASCORBIC-ACID; ANTHOCYANIN DEGRADATION; ANTIOXIDANT ACTIVITY; CHLOROGENIC ACID; WINES; IDENTIFICATION; INACTIVATION SO - Journal of Agricultural and Food Chemistry 2003 ;51(4):957-963 9606 UI - 7331 AU - Tam YYC AU - Torres-Guzman JC AU - Vizeacoumar FJ AU - Smith JJ AU - Marelli M AU - Aitchison JD AU - Rachubinski RA AD - Univ Alberta, Dept Cell Biol, Edmonton, AB T6G 2H7, CanadaUniv Guanajuato, Fac Chem, Inst Invest Biol Expt, Mexico City, DF, MexicoInst Syst Biol, Seattle, WA 98103, USARachubinski, RA, Univ Alberta, Dept Cell Biol, Edmonton, AB T6G 2H7, Canada TI - Pex11-related proteins in peroxisome dynamics: A role for the novel peroxin Pex27p in controlling peroxisome size and number in Saccharomyces cerevisiae AB - Transcriptome profiling identified the gene PEX25 encoding Pex25p, a peroxisomal membrane peroxin required for the regulation of peroxisome size and maintenance in Saccharomyces cerevisiae. Pex25p is related to a protein of unknown function encoded by the open reading frame, YOR193w, of the S. cerevisiae genome. Yor193p is a peripheral peroxisomal membrane protein that exhibits high sequence similarity not only to Pex25p but also to the peroxisomal membrane peroxin Pex11p. Unlike Pex25p and Pex11p, Yor193p is constitutively expressed in wild-type cells grown in oleic acid-containing medium, the metabolism of which requires intact peroxisomes. Cells deleted for the YOR193w gene show a few enlarged peroxisomes. Peroxisomes are greatly enlarged in cells harboring double deletions of the YOR193w and PEX25 genes, the YOR193w and PEX11 genes, and the PEX25 and PEX11 genes. Yeast two-hybrid analyses showed that Yor193p interacts with Pex25p and itself, Pex25p interacts with Yor193p and itself, and Pex11p interacts only with itself. Overexpression of YOR193w, PEX25, or PEX11 led to peroxisome proliferation and the formation of small peroxisomes. Our data suggest a role for Yor193p, renamed Pex27p, in controlling peroxisome size and number in S. cerevisiae MH - Canada MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 27 U4 - Cell Biology U5 - J;Article AV - English IS - 1059-1524 UR - ISI:000185660900013 L2 - INTEGRAL MEMBRANE-PROTEINS; NUCLEAR-PORE COMPLEX; YARROWIA-LIPOLYTICA; OLEIC-ACID; BIOGENESIS DISORDERS; CANDIDA-BOIDINII; CDNA CLONING; YEAST; GENE; IMPORT SO - Molecular Biology of the Cell 2003 ;14(10):4089-4102 9607 UI - 6856 AU - Tapia-Perez G AU - Garcia-Vazquez Z AU - Montaldo H AU - George J AD - Inst Nacl Invest Forestales Agr & Pecuarias, CENID PAVET, CIVAC, Morelia 62550, Michoacan, MexicoUNAM, Dept Genet, Fac Med Vet & Zootecn, Mexico City 04150, DF, MexicoUSDA ARS, Knipling Bushland US Livestock Insects Res Lab, Kerrville, TX 78028, USAGarcia-Vazquez, Z, Inst Nacl Invest Forestales Agr & Pecuarias, CENID PAVET, CIVAC, Apartado Postal 206, Morelia 62550, Michoacan, Mexico TI - Inheritance of resistance to flumethrin in the Mexican Aldama strain of the cattle tick Boophilus microplus (Acari : Ixodidae) AB - The objective of this study was to evaluate the inheritance mode of resistance to flumethrin in the Mexican Aldama Boophilus microplus strain. Two Mexican strains were used, the Chiapas susceptible (SS), and the Aldama flumethrin-resistant from Tamaulipas. Six steers weighing ca. 250 kg were randomly assigned for each of six crosses: the susceptible (SS), resistant (RR), and the F-1 (RS, SR) reciprocal crosses and F-2 (RS x RS and SR x SR). The reciprocal crosses were made to evaluate maternal and sex linkage effects. Bioassays tested resistant and susceptible larvae along with their hybrid F-1 and F-2 progeny against a series of concentrations of flumethrin (0, 0.0075, 0.00150, 0.00300, 0.00600 and 0.01200 mug/g). To test the single-gene hypothesis of resistance, a nonparametric line-cross test proposed by Collins was used. The bioassay data were subjected to probit analysis and the resistance factor and effective dominance obtained. Results of this study indicated that inheritance for flumethrin resistance in the Aldama strain was autosomal and controlled for more than one gene. The F-1 and F-2 larvae had similar lower resistant factor (RF 2.8 - 4.5) while the resistant Aldama strain was 21-fold higher (RF 81.8) than the mean of the F-1 and F-2. The extent of flumethrin resistance in the Aldama B. microplus strain depended upon the concentration of the pesticide used. Resistance was almost dominant at the lowest dose while almost completely recessive at the highest dose. Maternal effects were shown for egg-mass. These results shown here indicate more than one gene basis of flumethrin resistance in B. microplus ticks are present. Therefore it is necessary to locate and understand the major loci for elucidate the mechanism of resistance and improve the ability to track and delay the evolution of resistance MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0168-8162 UR - ISI:000186759700013 L2 - Boophilus microplus;cattle tick;crosses;flumethrin;inheritance;resistance;THURINGIENSIS TOXIN CRY1AC; INSECTICIDE RESISTANCE; BACILLUS-THURINGIENSIS; DIAMONDBACK MOTH; PYRETHROID RESISTANCE; SELECTION; POPULATIONS; EVOLUTION; DIAZINON; GENE SO - Experimental and Applied Acarology 2003 ;31(1-2):135-149 9608 UI - 6267 AU - Tapia E AU - Sanchez-Lozada LG AU - Santamaria J AU - Soto V AU - vila-Casado C AU - Johnson RJ AU - Rodriguez I AU - Herrera-Acosta J AD - Inst Cardiol 1 Chavez, Mexico City, DF, MexicoBaylor Coll Med, Houston, TX 77030, USAINBIOMED, Maracaibo, Zulia, Venezuela TI - Albumin overload (AO) induces glomerular hypertension and afferent arteriole (AA) vasculopathy in normal rats MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219102851 SO - Journal of the American Society of Nephrology 2003 ;14():616A-616A 9609 UI - 9154 AU - Tapia E AU - Franco M AU - Sanchez-Lozada LG AU - Soto V AU - vila-Casado C AU - Santamaria J AU - Quiroz Y AU - Rodriguez-Iturbe B AU - Herrera-Acosta J AD - Inst Nacl Cardiol, Dept Nephrol, Mexico City 14080, DF, MexicoInst Nacl Cardiol, Dept Pathol, Mexico City 14080, DF, MexicoUniv Hosp, Renal Serv, Maracaibo, VenezuelaUniv Hosp, Renal Lab, Maracaibo, VenezuelaInst Invest Biomed, Maracaibo, VenezuelaTapia, E, Inst Nacl Cardiol, Dept Nephrol, Juan Badiano No 1, Mexico City 14080, DF, Mexico TI - Mycophenolate mofetil prevents arteriolopathy and renal injury in subtotal ablation despite persistent hypertension AB - Background. Although renal protective effect of interrupting the inflammatory process is well established, it is still controversial if it also prevents the glomerular hemodynamic disturbances that initiate renal injury. We investigated the effects of suppressing inflammation with mycophenolate mofetil (MMF) on glomerular hemodynamics, arteriolar structural changes, and renal histologic injury in rats with subtotal renal ablation Methods. Micropuncture studies were performed 30 days after 5/6 nephrectomy in rats untreated and treated with MMF (30 mg/kg/day). Renal histology, immunohistochemistry for lymphocytes, macrophages and inducible nitric oxide synthase (iNOS) expression, as well as afferent arteriolar (AA) morphometry was evaluated. Results. Renal ablation significantly increased proteinuria (6.8 to 82.7 mg/day), mean arterial pressure (MAP) (120 to 166 mm Hg), single-nephron glomerular filtration rate (SNGFR) (34.8 to 56.3 nL/min), glomerular plasma flow (QA) (117.7 to 246.9 nL/min), and glomerular capillary pressure (PGC) (48.9 to 61.0 mm Hg). Afferent resistance (AR), efferent resistance, and ultrafiltration coefficient remained unchanged. Despite persisting arterial hypertension (152 mm Hg), MMF prevented proteinuria (13.3 mg/day), and significantly reduced SNGFR (44.4 nL/min), PGC (49.1 mm Hg), and QA (163.2 nL/min) due to a rise in AR (3.13 vs. 2.18 10(10) dyn/sec/cm(-5)). Glomerular sclerosis, tubulointerstitial damage, lymphocyte and macrophage infiltration, and iNOS expression were significantly reduced by MMF, in addition hypertrophy of AA resistance evaluated by the media/lumen ratio was prevented (P < 0.001). Conclusions. Reduction in proteinuria, SNGFR, QA, and PGC, despite elevated MAP, indicate preservation of AA function. These results suggest that inflammation associated arteriolopathy of AA contributes to glomerular hemodynamic disturbances that participate in the progression of renal disease MH - Mexico|Distrito Federal MH - Venezuela PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 26 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000180852200020 L2 - glomerular hemodynamics;arteriolopathy;mycophenolate mofetil;5/6 nephrectomy;inflammation;SALT-SENSITIVE HYPERTENSION; RAT REMNANT KIDNEY; ANGIOTENSIN-II; ULTRAFILTRATION COEFFICIENT; GLOMERULAR HYPERTENSION; TUBULAR CELLS; DAMAGE; INHIBITION; CYCLOSPORINE; MECHANISMS SO - Kidney International 2003 ;63(3):994-1002 9610 UI - 9219 AU - Tapia M AU - Roth M AU - Vazquez RA AU - Feinstein A AD - UNAM, Astron Inst, Ensenada 2800, Baja California, MexicoCarnegie Inst Washington, Las Campanas Observ, La Serena, ChileNatl Univ La Plata, IALP, Fac Ciencias Astron & Geofis, CONICET, RA-1900 La Plata, ArgentinaTapia, M, UNAM, Astron Inst, Apdo Postal 877, Ensenada 2800, Baja California, Mexico TI - Imaging study of NGC 3372, the Carina nebula - I. UBVR1JHK photometry of Tr 14, Tr 15, Tr 16 and Car I AB - We present the results of a large-scale imaging photometric study of the stellar population in the northern part of NGC 3372 in the UBVRIJHK bands with a wavelength coverage from 0.33 to 2.5 mum. The observations were made at Las Campanas Observatory. The optical CCD mosaics cover an area approximately of 32 x 22 arcmin(2) centred between the Tr 14 and Tr 16 clusters. The survey was extended to cover 12 x 12 arcmin(2) at the location of Tr 15. Near-infrared NICMOS3 mosaics covering the areas occupied by these clusters were obtained in the JHK photometric bands. By means of star counts in V , the centres and sizes of each cluster were redetermined yielding: Tr 14 (r = 264 arcsec), Tr 15 (r = 320 arcsec) and Tr 16 (r = 320 arcsec). It was confirmed that Cr 232 is not a true cluster. Multicolour optical photometry was obtained for 4152 stars. Two colour and colour-magnitude diagrams are presented and analysed for each individual cluster and compared to those of the field. We confirm the widespread variations in the dust density and also in the dust size distribution leading to widely different values of A(V) and reddening laws towards Tr 14 and Tr 16. No spatial patterns were found for these variations. Spectroscopic parallaxes were computed and the results are consistent with all three clusters being at a similar distance from the Sun (= 2.7 kpc) but the data have shown very large scatter in both A(V) and d . Analyses of the extinction-corrected colour-magnitude diagrams suggest ages between 3 and 60 million years for the stars in Tr 15 and between less than 1 and 6 million years for Tr 14 and Tr 16. A small number of infrared-excess stars were found in Tr 16 and Tr 14 but not in Tr 15. The distribution of stars in Tr 14 seen in the near-infrared suggests that this cluster is partially embedded in a molecular cloud. This molecular cloud extends towards the west reaching its highest density, marked by a CO peak emission, some three arcmin to the south-west of the nucleus of Tr 14. The rich ultraviolet field created by the Tr 14 stars ionizes most of the visible H ii region in its vicinity and most of the radio H ii region Car I. Evidence is found of ionization fronts leading into the molecular cloud, which appears to be 'wrapping' the Tr 14 cluster. Deep JHK images of the Car I region reveal the presence of an embedded stellar population illuminating a large infrared reflection nebula. It includes at least one O9-B0 star associated with an ultracompact H ii region. Nebulous 2.2 mum emission from three of the mid-infrared sources in the Tr 14 region is also found MH - Argentina MH - Chile MH - Mexico|Baja California PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 18 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000180741300008 L2 - stars : formation;HII regions;ISM : individual : NGC 3372;open clusters and associations : general;NEAR-INFRARED PHOTOMETRY; OPEN CLUSTER TRUMPLER-16; ETA-CARINAE; EXTINCTION LAW; STAR-FORMATION; STELLAR CONTENT; COMPLEX; DUST; POPULATION; EMISSION SO - Monthly Notices of the Royal Astronomical Society 2003 ;339(1):44-62 9611 UI - 9038 AU - Taran YA AU - Inguaggiato S AD - Natl Autonomous Univ Mexico, Inst Geophys, Mexico City 04510, DF, MexicoInst Nazl Geofis & Vulcanol, Sez Palermo, Palermo, ItalyTaran, YA, Natl Autonomous Univ Mexico, Inst Geophys, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Reply to the comment by R.M. Prol-Ledesma on "Geochemistry of fluids from submarine thermal springs at Punta de Mita, Nayarit, Mexico" MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0377-0273 UR - ISI:000181293100008 SO - Journal of Volcanology and Geothermal Research 2003 ;121(3-4):319-322 9612 UI - 6382 AU - Tarasov I AU - Dybiec M AU - Ostapenko S AU - Torchynska TV AD - Univ S Florida, Tampa, FL 33613, USAInst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoTarasov, I, Univ S Florida, 4204 E Fowler Ave, Tampa, FL 33613, USA TI - Metastable defects in Si3N4 layers accessed by scanning photoluminescence AB - We report on spectroscopic photoluminescence (PL) mapping performed at room temperature in commercial grade multi-crystalline silicon ribbon wafers for solar cells. Besides a standard hand-to-hand luminescence of silicon with maximum at 1.09 eV, a broad visible PL band at 1.94 eV is observed under UV excitation on wafers covered with Si3N4 layer. Scanning PL was applied consecutively to both PL bands. We observed that the intensity and topography of the visible PL are not related to the band-to-band luminescence, but rather determined by parameters of Si3N4 deposition. The visible PL band exhibits a reversible photoquenching of the intensity under 325 nm HeCd laser. The PL intensity can be recovered by annealing with the rate showing a thermally activated behavior. The observed PL photoquenching reveals a metastable process in Si3N4 film. We demonstrate the possibility to create a reversible luminescence pattern on the Si3N4 layer using UV laser beam. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000188300200237 L2 - photoluminescence;Si3N4;quenching;metastability;AMORPHOUS-SILICON SO - Physica B-Condensed Matter 2003 ;340():1124-1128 9613 UI - 8568 AU - Tassi F AU - Vaselli O AU - Capaccioni B AU - Macias JL AU - Nencetti A AU - Montegrossi G AU - Magro G AD - Dept Earth Sci, I-50121 Florence, ItalyUniv Florence, CNR, Inst Geosci & Earth Resources, I-50121 Florence, ItalyInst Volcanol & Geochem, I-61029 Urbino, ItalyNatl Autonomous Univ Mexico, Inst Geophys, Mexico City 04510, DF, MexicoCNR, Unit Pisa, I-56124 Pisa, ItalyTassi, F, Dept Earth Sci, Via G La Pira 4, I-50121 Florence, Italy TI - Chemical composition of fumarolic gases and spring discharges from El Chichon volcano, Mexico: causes and implications of the changes detected over the period 1998-2000 AB - Since the March-April 1982 eruption of El Chichon volcano, intense hydrothermal activity has characterised the 1-km-wide summit crater. This mainly consists of mud and boiling pools, fumaroles, which are mainly located in the northwestern bank of the crater lake. During the period 1998-2000, hot springs and fumaroles discharging inside the crater and from the southeastern outer flank (Agua Caliente) were collected for chemical analyses. The observed chemical fluctuations suggest that the physico-chemical boundary conditions regulating the thermodynamic equilibria of the deep rock/fluid interactions have changed with time. The chemical composition of the lake water, characterised in the period 1983-1997 by high Na+, Cl-, Ca2+ and SO42- contents, experienced a dramatic change in 1998-1999, turning from a Na+-Cl-- to a Ca2+-SO42- -rich composition. In June 2000, a relatively sharp increase in Na+ and Cl- contents was observed. At the same time, SO2/H2S ratios and H-2 and CO contents in most gas discharges increased with respect to the previous two years of observations, suggesting either a new input of deep-seated fluids or local variations of the more surficial hydrothermal system. Migration of gas manifestations, enhanced number of emission spots and variations in both gas discharge flux and outlet temperatures of the main fluid manifestations were also recorded. The magmatic-hydrothermal system of El Chichon is probably related to interaction processes between a deep magmatic source and a surficial cold aquifer; an important role may also be played by the interaction of the deep fluids with the volcanic rocks and the sedimentary (limestone and evaporites) basement. The chemical and physical changes recorded in 1998-2000 were possibly due to variations in the permeability of the conduit system feeding the fluid discharges at surface, as testified by the migration of gas and water emanations. Two different scenarios can be put forward for the volcanic evolution of El Chichon: (1) build-up of an infra-crater dome that may imply a future eruption in terms of tens to hundreds of years; (2) minor phreatic-phreatomagmatic events whose prediction and timing is more difficult to constrain. This suggests that, unlike the diminished volcanic activity at El Chichon after the 1982 paroxistic event, the volcano-hydrothermal fluid discharges need to be more constantly monitored with regular and more frequent geochemical sampling and, at the same time, a permanent network of seismic stations should be installed. (C) 2003 Elsevier Science B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000182545400008 L2 - Chiapas;El Chichon volcano;geochemical monitoring;fluid geochemistry;volcanic gases;LIGHT-HYDROCARBONS; ERUPTIVE ACTIVITY; 1982 ERUPTIONS; CHIAPAS; HOLOCENE; SYSTEM; SULFUR SO - Journal of Volcanology and Geothermal Research 2003 ;123(1-2):105-121 9614 UI - 6580 AU - Tauer K AU - Ramirez AG AU - Lopez RG AD - Max Planck Inst Colloids & Interfaces, D-14476 Golm, GermanyCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoTauer, K, Max Planck Inst Colloids & Interfaces, Muhlenberg, D-14476 Golm, Germany TI - Effect of the surfactant concentration on the kinetics of oil in water microemulsion polymerization: a case study with butyl acrylate AB - A comprehensive investigation of aqueous microemulsion polymerization of butyl acrylate at high surfactant concentrations by means of reaction calorimetry and dynamic light scattering revealed unexpected results with regard to polymerization kinetics and colloidal properties of the final latexes. Particularly, with increasing surfactant concentrations, a decrease in the overall rate of polymerization accompanied by an increasing incubation time of the polymerization and increasing average particle sizes in the final latexes has been observed. Based on reviewing former results on microemulsions; and microemulsion polymerizations published in the open literature and the presentation of new experimental results an attempt is made to explain the experimental results consistently with a particle nucleation mechanism based on the classical nucleation theory MH - Germany MH - Mexico|Coahuila PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1631-0748 UR - ISI:000187639500004 L2 - microemulsion polymerization;emulsifier concentration;polymerization rates;particle size;particle nucleation;incubation time;MICRO-EMULSION SYSTEMS; METHYL-METHACRYLATE; LIGHT-SCATTERING; STYRENE POLYMERIZATION; PARTICLE FORMATION; NUCLEATION; DISPERSIONS; SULFATE; MODEL; SIZE SO - Comptes Rendus Chimie 2003 ;6(11-12):1245-1266 9615 UI - 6371 AU - Taylor HL AU - Lemos-Espinal JA AU - Smith HM AD - Regis Univ, Dept Biol, Denver, CO 80221, USAUNAM, Escuela Nacl Estudios Prof Iztacala, Ecol Lab, Unidad Biotechol & Protolipos, Mexico City 54090, DF, MexicoUniv Colorado, Dept Environm Populat & Organism Biol, Boulder, CO 80309, USATaylor, HL, Regis Univ, Dept Biol, Denver, CO 80221, USA TI - Morphological characteristics of a newly discovered population of Aspidoscelis tesselata (Squamata : Teiidae) from Chihuahua, Mexico, the identity of an associated hybrid, and a pattern of geographic variation AB - A population of the parthenogenetic teiid lizard, Aspidoscelis tesselata, was recently discovered in the vicinity of Benavides, Chihuahua, Mexico. This population is located in the general area where A. tesselata originated, as a parthenogenetically competent F, hybrid, from hybridization between A. tigris marmorata and A. gularis septemvittata. Subsequent to its origin, A. tesselata utilized habitats associated with the Rio Grande and Pecos River drainages to expand its range into New Mexico. We used a canonical variate analysis of samples from Chihuahua, Mexico, and the Rio Grande and Pecos River distribution corridors in southern New Mexico to determine the pattern of morphological variation among the 4 populations. The 2 Populations from New Mexico were divergent, both from the Chihuahuan populations (which were morphologically similar) and from each other. A male specimen, collected with A. tesselata in the Benavides vicinity, was identified as a putative A. tesselata x A. tigris marmorata hybrid MH - Mexico|Distrito Federal MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000188387800024 L2 - PARTHENOGENETIC CNEMIDOPHORUS-TESSELATUS; GENUS CNEMIDOPHORUS; WHIPTAIL LIZARDS; C-TESSELATUS; DIVERSITY; COMPLEX; ORIGIN; SAURIA SO - Southwestern Naturalist 2003 ;48(4):692-700 9616 UI - 5365 AU - Tchernykh A AU - Trystram D AD - CICESE, Ensenada, Baja California, MexicoID IMAG, F-38330 Montbonnot St Martin, FranceTchernykh, A, CICESE, Ensenada, Baja California, Mexico TI - Online scheduling of multiprocessor jobs with idle regulation AB - In this paper, we focus on on-line scheduling of multiprocessor jobs with emphasis on the regulation of idle periods in the frame of general list policies. We consider a new family of scheduling strategies based on two phases which successively combine sequential and parallel executions of the jobs. These strategies are part of a more generic scheme introduced in [6]. The main result is to demonstrate that it is possible to estimate the amount of resources that should remain idle for a better regulation of the load and to obtain approximation bounds MH - France MH - Mexico|Baja California PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000221559200018 L2 - SYSTEMS SO - Parallel Processing and Applied Mathematics 2003 ;():131-144 9617 UI - 9257 AU - Tejeda-Mansir A AU - Montesinos RM AU - Magana-Plaza I AU - Guzman R AD - IPN, CINVESTAV, Dept Biotecnol & Bioingn, Mexico City 07360, DF, MexicoUniv Sonora, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Environm Chem & Engn, Tucson, AZ 85721, USATejeda-Mansir, A, IPN, CINVESTAV, Dept Biotecnol & Bioingn, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Breakthrough performance of stacks of dye-cellulosic fabric in affinity chromatography of lysozyme AB - The breakthrough performance of stacks of dye-cellulosic fabric in affinity chromatography of lysozyme was investigated in batch and flow experiments. Breakthrough curves were significantly affected by flow rate and were not dependent on the feed solution concentration. System dispersion curves could not explain the flow-rate dependence. Breakthrough curves were analyzed by coupling the kinetic model for pore mass transfer as the only controlling resistance and a system dispersion model. From the analysis, pore film mass transfer resistance was found to be the leading rate-limiting factor when the residence time in the column is greater than 5 min. The model was used to predict the operating and design parameters needed to obtain sharp breakthrough curves. Selectivity studies using lysozyme and bovine serum albumin mixtures showed a high system selectivity for lysozyme MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 1615-7591 UR - ISI:000180866700006 L2 - affinity chromatography;proteins;frontal analysis;CONTINUOUS STATIONARY-PHASE; ION-EXCHANGE MEMBRANES; PROTEIN CHROMATOGRAPHY; PURIFICATION; ADSORPTION; SEPARATION; FILTRATION; COLUMNS SO - Bioprocess and Biosystems Engineering 2003 ;25(4):235-242 9618 UI - 7028 AU - Tellez-Luis SJ AU - Moldes AB AU - Vazquez M AU - Alonso JL AD - Univ Santiago de Compostela, Dept Quim Analit, Escuela Politecn Super, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Mexico City, DF, MexicoUniv Vigo, Fac Ourense, Dept Chem Engn, Vigo, SpainVazquez, M, Univ Santiago de Compostela, Dept Quim Analit, Escuela Politecn Super, Area Tecnol Alimentos, Campus Lugo, Lugo 27002, Spain TI - Alternative media for lactic acid production by Lactobacillus delbrueckii NRRL b-445 AB - Lactic acid bacteria are generally recognized as nutritionally fastidious. The complexity of the media increases the cost of lactic acid production. In this study a low-cost nutrient medium based on corn steep liquor (CSL) was developed for lactic acid production by Lactobacillus delbrueckii NRRL B-445. Starting from a medium containing 90 g l(-1) glucose and 20 g l(-1) CSL as a sole nutrient source, 70.7 g l(-1) lactic acid was obtained with an economic efficiency of 98 g lactic acid per E nutrient. Other media, made with CSL and each individual component (yeast extract, peptone, sodium acetate, sodium citrate, K2HPO4, MgSO4.7H(2)O, MnSO4.H2O or FeSO4.7H(2)O) of a general (Mercier) lactobacilli medium were also assayed. The highest economical efficiency (134 g lactic acid per E nutrient) was obtained supplementing 10 g l(-1) CSL with 0.05 g l(-1) FeSO4.7H(2)O. Additionally, lactic acid production and glucose consumption were mathematically modelled and the regression parameters obtained were correlated with CSL concentration by linear or exponential equations MH - Mexico|Distrito Federal MH - Spain PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0960-3085 UR - ISI:000186499500011 L2 - Lactobacillus delbrueckii;lactic acid;corn steep liquor;nutrients study;mathematical modelling;NITROGEN-SOURCES; FERMENTATION; GLUCOSE; CORN; BULGARICUS; ETHANOL; CASEI SO - Food and Bioproducts Processing 2003 ;81(C3):250-256 9619 UI - 8392 AU - Tellez-Luis SJ AU - Moldes AB AU - Alonso JL AU - Vazquez M AD - Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88740, Tamaulipas, MexicoUniv Vigo, Fac Sci, Dept Chem Engn, Orense 32004, SpainUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainVazquez, M, Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Dept Food Sci & Technol, Calle 16 & Lago Chapala,Col Aztlan, Reynosa 88740, Tamaulipas, Mexico TI - Optimization of lactic acid production by Lactobacillus delbrueckii through response surface methodology AB - This article describes the optimization through response surface methodology of a low-cost medium based on Corn Steep Liquor (CSL) for lactic acid production by Lactobacillu delbrueckii NRRL B445. The effect of the fermentation time was also considered. A maximum lactic acid concentration (93.4 g/L) was predicted using 15 g of CSL/L and 6 g of yeast extract/L at a fermentation time of 80.1 h. However, the maximum productivity (3.50 g/L/h) was predicted by using 15 g of CSL/L, 6 g of yeast extract/L, and 8.9 g of peptone/L after 24 h. From an economical perspective, better results were obtained using 15 g of CSL/L alone and 24 h, achieving a maximum economical productivity of 229.7 g of lactic acid per hour and considerable savings in nutrients MH - Mexico|Tamaulipas MH - Spain PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 7 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000183070600054 L2 - lactic acid;corn steep liquor;response surface methodology;modeling;FERMENTATION; GLUCOSE; ETHANOL; CORN SO - Journal of Food Science 2003 ;68(4):1454-1458 9620 UI - 8784 AU - Tellez L AU - Rubio J AU - Rubio F AU - Morales E AU - Oteo JL AD - CSIC, Inst Ceram & Vidrio, E-28049 Madrid, SpainInst Politecn Nacl, ESIQIE, Lab Catalisis & Mat, UPALM Zacatenco, Mexico City 07738, DF, MexicoTellez, L, CSIC, Inst Ceram & Vidrio, Plaza Murillo 2, E-28049 Madrid, Spain TI - Synthesis of inorganic-organic hybrid materials from TEOS, TBT and PDMS AB - Inorganic-organic hybrid materials have been synthesized by reaction of tetraethoxysilane (TEOS), titanium tetrabutoxide (TBT) and silanol-terminated polydimethylsiloxane (PDMS). The hydrolysis and polymerization reactions of TEOS and PDMS in presence of TBT have been followed by means of FT-IR spectroscopy. Hydrolysis reactions have been characterized by Si-O-C and Ti-O-C bonds and polymerization reactions by Si-O-Si, Si-O-Ti and Ti-O-Ti bonds. The instantaneous hydrolysis of TEOS, the condensation reactions between Si OH groups forming crosslinked and linear Si-O-Si structures and the copolimerization reactions between Si-OH groups and PDMS molecules have been observed. The reaction between Ti-OH and Si-OH groups or PDMS gives Si-O-Ti bonds. Si-O-Ti bonds are formed during the addition step of TBT and they show a decrease along the reaction time up to gelling. By another hand, the concentration of crosslinked and linear Si-O-Si structures depend on the TBT concentration. High TBT concentration favors the formation of crosslinked chains. TBT influences the hydrolysis and copolymerization reactions between hydrolyzed TEOS and PDMS molecules. (C) 2003 Kluwer Academic Publishers MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000182098400025 L2 - FT-IR; SOL; GEL; HYDROLYSIS; SPECTROSCOPY; EVOLUTION; ORMOSILS; OXIDE SO - Journal of Materials Science 2003 ;38(8):1773-1780 9621 UI - 7011 AU - Tello PG AU - Gonzalez J AU - Valenzuela R AD - Univ Pais Vasco, Dept Mat Phys, San Sebastian 20080, SpainNatl Autonomous Univ Mexico, Inst Mat Res, Mexico City 04510, DF, MexicoGonzalez, J, Univ Pais Vasco, Dept Mat Phys, POB 1072, San Sebastian 20080, Spain TI - Inductance spectroscopy characterization of Fe-rich and Co-rich amorphous alloys AB - Results of the inductance spectroscopy as a function of the annealing parameters are presented for FeZrB(Cu) samples and Co-rich samples. Dynamics of the domain walls in amorphous and nanocrystalline samples have been evaluated by the inductance spectroscopy formalism, and appears to be a useful technique to study the domain wall structure from the analysis of the reversible and irreversible movements of the domain walls. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000186435700029 L2 - MAGNETOIMPEDANCE SO - Journal of Non-Crystalline Solids 2003 ;329(1-3):144-150 9622 UI - 6949 AU - Tenorio-Tagle G AU - Palous J AU - Silich S AU - Medina-Tanco GA AU - Munoz-Tunon C AD - Acad Sci Czech Republ, Inst Astron, Prague 14131 4, Czech RepublicInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUSP, Inst Astron & Geofis, BR-04301904 Sao Paulo, BrazilInst Astrofis Canarias, Tenerife 38200, SpainPalous, J, Acad Sci Czech Republ, Inst Astron, Bocni II 1401, Prague 14131 4, Czech Republic TI - On the formation of massive stellar clusters AB - Here we model a star forming factory in which the continuous creation of stars results in a highly concentrated, massive (globular cluster-like) stellar system. We show that under very general conditions a large-scale gravitational instability in the ISM, which triggers the collapse of a massive cloud, leads with the aid of a spontaneous first generation of massive stars, to a standing, small-radius, cold and dense shell. Eventually, as more of the collapsing matter is processed and incorporated, the shell becomes gravitationally unstable and begins to fragment, allowing the formation of new stars, while keeping its location. This is due to a detailed balance established between the ram pressure from the collapsing cloud which, together with the gravitational force exerted on the shell by the forming cluster, acts against the mechanical energy deposited by the collection of new stars. We present a full analysis of feedback and show how the standing shell copes with the increasing mechanical energy generated by an increasing star-formation rate. The latter also leads to a rapidly growing number of ionizing photons, and we show that these manage to ionize only the inner skin of the standing star-forming shell. We analyze the mass spectrum of fragments that result from the continuous fragmentation of the standing shell and show that its shape is well approximated at the high mass end by a power law with slope -2.25, very close to the value that fits the universal IMF. Furthermore, it presents a maximum near to one solar mass and a rapid change towards a much flatter slope for smaller fragments. The self-contamination resultant from the continuous generation of stars is shown to lead to a large metal spread in massive (similar to10(6) M-circle dot) clusters, while clusters with a mass similar to 10(5) M-circle dot or smaller, simply reflect the initial metalicity of the collapsing cloud. This is in good agreement with the data available for globular clusters in the Galaxy. Other observables such as the expected IR luminosity and the H-alpha equivalent width caused by the forming clusters are also calculated MH - Brazil MH - Czech Republic MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000186571300016 L2 - stars : formation;superstar clusters;supernovae : general;ISM : bubbles;globular clusters : general;galaxies : starburst;GLOBULAR-CLUSTERS; STAR-CLUSTERS; GRAVITATIONAL-INSTABILITY; DYNAMICAL EVOLUTION; LUMINOSITY FUNCTION; ISOTHERMAL SPHERE; YOUNG; STARBURST; GALAXIES; REGIONS SO - Astronomy & Astrophysics 2003 ;411(3):397-404 9623 UI - 7191 AU - Tenorio-Tagle G AU - Silich S AU - Munoz-Tunon C AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainTenorio-Tagle, G, Inst Nacl Astrofis Opt & Elect, AP 51, Puebla 72000, Mexico TI - Supergalactic winds driven by multiple super-star clusters AB - Here we present two-dimensional hydrodynamic calculations of free expanding supergalactic winds, taking into consideration strong radiative cooling. Our main premise is that supergalactic winds are powered by collections of super - star clusters, each of which is a source of a high-metallicity supersonic diverging outflow. The interaction of winds from neighboring super - star clusters is shown here to lead to a collection of stationary oblique shocks and crossing shocks, able to structure the general outflow into a network of dense and cold, kiloparsec long. laments that originate near the base of the outflow. The shocks also lead to extended regions of diffuse soft X-ray emission and, furthermore, to channel the outflow with a high degree of collimation into the intergalactic medium MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186170800026 L2 - galaxies : ISM;galaxies : starburst;ISM : bubbles;X-rays : general;X-RAY-EMISSION; DWARF GALAXIES; GALACTIC SUPERWINDS; PROCESSED MATTER; MASSIVE STARS; STARBURST; METALLICITY; M82; LUMINOSITY; EVOLUTION SO - Astrophysical Journal 2003 ;597(1):279-288 9624 UI - 7875 AU - Teo KBK AU - Ferrari AC AU - Fanchini G AU - Rodil SE AU - Yuan J AU - Tsai JTH AU - Laurenti E AU - Tagliaferro A AU - Robertson J AU - Milne WI AD - Univ Cambridge, Dept Engn, Cambridge CB2 IPZ, EnglandPolitecn Turin, INFM, Turin, ItalyPolitecn Turin, Dept Phys, Turin, ItalyUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City, DF, MexicoUniv Turin, Dept Chem, IFM, Turin, ItalyFerrari, AC, Univ Cambridge, Dept Engn, Cambridge CB2 IPZ, England TI - Highest optical gap tetrahedral amorphous carbon (vol 11, pg 1086, 2002) MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Correction AV - English IS - 0925-9635 UR - ISI:000184315100028 SO - Diamond and Related Materials 2003 ;12(8):1438-1438 9625 UI - 6759 AU - Terrazas A AU - Serafin N AU - Hernandez H AU - Nowak R AU - Poindron P AD - UAQ, Lab Etol, Inst Neurobiol, Queretaro, MexicoUniv Tours, INRA, CNRS, UMR 6073, F-37380 Nouzilly, FranceTerrazas, A, UAQ, Lab Etol, Inst Neurobiol, Campus UNAM,AP 1-1142, Queretaro, Mexico TI - Early recognition of newborn goat kids by their mother: II. Auditory recognition and evidence of an individual acoustic signature in the neonate AB - The vocal recognition of newborn kids by their mother at 2 days postpartum and the possible existence of interindividual differences in the voice structure of newborn kids were investigated in two separate studies. The ability, of goats to discriminate between the bleats of their own versus an alien kid was tested at 2 days postpartum in mothers being prevented access to visual and olfactory cues from the young. Goats spent significantly more time on the side of the enclosure from which their own kid was bleating, looked in its direction for longer and responded more frequently to the bleats of their own than to those of the alien kid (p < 0.05). In the second study, the sonograms of 13 kids, studied from Days I to 5, showed significant interindividual differences for the five variables taken into account and on each of the 5 days (duration of bleat, fundamental frequency, peak frequency, and numbers of segments and of harmonics). The potential for individual coding ranged between 1.1 and 4.1, indicating that for some variables variations between individuals were greater than intraindividual variations. Furthermore, when considering the five parameters together, the discriminating scores showed an average of 95% in the 78 combinations of any 2 kids for any given day. Finally, some significant intraindividual differences also were found between days, suggesting ontogenic changes in the characteristics of the kid's voice in early life. Therefore, mother goats are likely to recognize the vocalizations of their 48-hr-old kids, as they show sufficient interindividual variability to allow the existence of individual vocal signatures, even though some of the characteristics of the bleats change rapidly over time. (C) 2003 Wiley Periodicals, Inc MH - France MH - Mexico|Queretaro PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Developmental Biology;Psychology U5 - J;Article AV - English IS - 0012-1630 UR - ISI:000187030900004 L2 - goat;kid;sonogram;vocal recognition of young;maternal behavior;MATERNAL RECOGNITION; OLFACTORY CUES; MERINO SHEEP; VOICE; LAMBS; EWES; POSTPARTUM; BEHAVIOR; INFANTS; CALVES SO - Developmental Psychobiology 2003 ;43(4):311-320 9626 UI - 8266 AU - Terrazas LI AU - Satoskar AR AU - Tena CA AU - Graullera V AU - Rodriguez-Sosa M AD - Inst Nacl Cardiol Ignacio Chavez, Mexico City 14080, DF, MexicoOhio State Univ, Columbus, OH 43210, USAInst Nacl Cardiol, Mexico City, DF, Mexico TI - Stat-4 mediated IL-12 signaling pathway is critical for development of protective immunity in experimental cysticercosis MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000182367000913 SO - Faseb Journal 2003 ;17(7):C197-C197 9627 UI - 6876 AU - Terrones M AU - Golberg D AU - Grobert N AU - Seeger T AU - Reyes-Reyes M AU - Mayne M AU - Kamalakaran R AU - Dorozhkin P AU - Dong ZC AU - Terrones H AU - Ruhle M AU - Bando Y AD - IPICYT, Adv Mat Dept, San Luis Potosi 78216, MexicoNatl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, JapanMax Planck Inst Met Res, D-70569 Stuttgart, GermanyChernogolovka Solid State Phys Inst, Chernogolovka 142432, Moscow Reg, RussiaTerrones, M, IPICYT, Adv Mat Dept, Camino Presa San Jose 2055, San Luis Potosi 78216, Mexico TI - Production and state-of-the-art characterization of aligned nanotubes with homogeneous BCxN (1 <= x <= 5) compositions AB - Aligned and hollow BCxN nanotubes with uniformly distributed concentrations of B, C, and N are produced by reacting aligned CNx nanotubes with B2O3 and CuO in a N-2 atmosphere at similar to 1800 degreesC. It is found that the production of these homogeneous nanotubes is sensitive to the reaction temperature determining the growth kinetics, because segregation of BCN domains may occur at lower or higher temperatures than those used in this study. The Figure shows a molecular model of a coaxial nanocable composed of B, C, and N MH - Germany MH - Japan MH - Mexico|San Luis Potosi MH - Russia PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0935-9648 UR - ISI:000186820500003 L2 - C-N NANOTUBES; CARBON NANOTUBES; FIELD-EMISSION; SCALE OBJECTS; BORON-NITRIDE; GROWTH; BC2N; BN; MICROSCOPE SO - Advanced Materials 2003 ;15(22):1899-+ 9628 UI - 6393 AU - Tessieri L AU - Wilkie J AD - Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, CanadaTessieri, L, Univ Michoacana San Nicolas Hidalgo, Inst Fis Matemat, Morelia 58060, Michoacan, Mexico TI - Decoherence in a spin-spin-bath model with environmental self-interaction AB - A low-temperature model system consisting of a central spin coupled to a spin-bath is studied to determine whether interaction among bath spins has an effect on central spin dynamics. In the absence of intra-environmental coupling, decoherence of the central spin is fast and irreversible. Strong intra-environmental interaction results in an effective decoupling of the central spin from the bath and suppression of decoherence. Weaker intra-environmental coupling reduces but does not eliminate decoherence. We argue that similar suppression of decoherence should be observed for electronic states of He impurities in silicon or diamond MH - Canada MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000188317200012 L2 - QUANTUM CHAOS; RELAXATION PROPERTIES; DISSIPATIVE SYSTEM; SPECTRAL DENSITY; LOW-TEMPERATURES; MASTER EQUATION; PHASE-SPACE; DYNAMICS; MEMORY; TIME SO - Journal of Physics A-Mathematical and General 2003 ;36(49):12305-12327 9629 UI - 7836 AU - Tharawan K AU - Manopaiboon C AU - Ellertson CE AU - Limpakarnjanarat K AU - Kilmarx PH AU - Coggins C AU - Chaikummao S AU - Mastro TD AU - Elias CJ AD - Populat Council, Bangkok, ThailandPopulat Council, New York, NY 10021, USAPopulat Council, Mexico City, DF, MexicoBOTUSA Project, Gaborone, BotswanaCtr Dis Control & Prevent, Natl Ctr HIV STD & TB Prevent, Atlanta, GA, USAEllertson, CE, Populat Council, Bangkok, Thailand TI - Knowledge and perceptions of HIV among peripartum women and among men whose wives are of reproductive age, northern Thailand AB - To investigate knowledge and perceptions of HIV transmission risk and interest in vaginal microbicides in northern Thailand, we conducted 14 focus group discussions and 80 interviews with men and women in Chiang Rai province. Women were recruited from antenatal or postpartum clinics, and men from various work sites. Participants evinced substantial knowledge about HIV, with two exceptions important for prevention campaigns: (a) confusion about the window period between a new infection and positive HIV-test result and (b) overestimation of the safety of extramarital sex with partners who are not sex workers. Most participants reported no personal HIV risk. Participants described Thai women as generally vulnerable to HIV infection because of the unlikelihood of condom use with their husbands and because women cannot control their husbands' extramarital behavior. Women apparently face particular risk after childbearing;, peripartum abstinence averages 6-9 months, during which time some Thai men may have alternative sex partners. Women, and to a lesser degree, men were interested in potential microbicides, although they voiced many thoughtful questions about the products and about efficacy trials. (C) 2003 Elsevier Inc. All rights reserved MH - Botswana MH - Mexico|Distrito Federal MH - Thailand MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000184481900009 L2 - risk perception;HIV/AIDS;Thailand;postpartum abstinence;heterosexual transmission;risk behavior;microbicides;SEXUALLY-TRANSMITTED-DISEASES; RISK; BEHAVIOR; AIDS; PREVALENCE; INFECTION; EPIDEMIC; CORRECT; DECLINE; PROGRAM SO - Contraception 2003 ;68(1):47-53 9630 UI - 8049 AU - Thomas DB AU - Eger JE AU - Jones W AU - Ortega-Leon G AD - USDA ARS, Kika de la Garza Subtrop Agr Res Ctr, Weslaco, TX 78596, USADow AgroSci, Tampa, FL 33629, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoThomas, DB, USDA ARS, Kika de la Garza Subtrop Agr Res Ctr, 2413 E Hwy 83, Weslaco, TX 78596 USA TI - The African cluster bug, Agonoscelis puberula (Heteroptera : Pentatomidae), established in the new world AB - An African species of Pentatomidae, Agonoscelis puberula Stal, is reported for the first time from Mexico, the southern United States and the islands of Jamaica and Hispaniola, where it has now established. The oldest Western Hemisphere record dates from 1985. This species has gone unrecognized probably because of its close resemblance to species of the New World genus Trichopepla Stal. The primary host plant of A. puberula is the introduced weed, common horehound, Marrubium vulgare L. It has also been reported damaging winter fruits in South Africa MH - Mexico|Distrito Federal MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000183972900007 L2 - cluster bug;horehound;stink bug;invasive species;HEMIPTERA SO - Florida Entomologist 2003 ;86(2):151-153 9631 UI - 8658 AU - Thomas KA AU - Guzman-Davalos L AU - Manimohan P AD - Univ Calicut, Dept Bot, Calicut 673635, Kerala, IndiaUniv Guadalajara, Dept Bot & Zool, Zapopan 45101, Jalisco, MexicoThomas, KA, Univ Calicut, Dept Bot, Calicut 673635, Kerala, India TI - A new species and new records of Gymnopilus from India AB - A new terrestrial species of Gymnopilus, G. terricola, is proposed. G., bryophilus, previously known only from Jamaica, is recorded for first time from India, and G. dilepis is recorded from a new locality MH - India MH - Mexico|Jalisco PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 3 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000182336900029 L2 - Basidiomycota;Agaricales;Cortinariaceae;Gymnopilus bryophilus;G. dilepis;G. terricola sp nov SO - Mycotaxon 2003 ;85():297-305 9632 UI - 8298 AU - Thompson FL AU - Thompson CC AU - Li Y AU - Gomez-Gil B AU - Vandenberghe J AU - Hoste B AU - Swings J AD - State Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumState Univ Ghent, BCCMTM LMG Bacterial Collect, B-9000 Ghent, BelgiumOcean Univ Qingdao, Coll Marine Life Sci, Qingdao 266003, Peoples R ChinaCIAD, Mazatlan Unit Aquaculture, Mazatlan 82000, Sinaloa, MexicoThompson, FL, State Univ Ghent, Microbiol Lab, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - Vibrio kanaloae sp nov., Vibrio pomeroyi sp nov and Vibrio chagasii sp nov., from sea water and marine animals AB - The taxonomic position of the fluorescent amplified fragment length polymorphism fingerprinting groups A46 (five isolates), A51 (six isolates), A52 (five isolates) and A53 (seven isolates) obtained in a previous study were further analysed through a polyphasic approach. The 23 isolates were phylogenetically related to Vibrio splendidus, but DNA-DNA hybridization experiments proved that they belong to three novel species. Chemotaxonomic and phenotypic analyses further disclosed several features that differentiate between the 23 isolates and known Vibrio species. The names Vibrio kanaloae sp. nov. (type strain LMG 20539(T) = CAIM 485(T); EMBL accession no. AJ316193; G + C content 44.7 mol%), Vibrio pomeroyi sp. nov. (type strain LMG 20537 T = CAIM 578 T; EMBL accession no. AJ491290; G + C content 44.1 mol%) and Vibrio chagasii sp. nov. (type strain LMG 21353(T) = CAIM 431(T); EMBL accession no. AJ316199; G + C content 44.6 mol%) are respectively proposed to encompass the five isolates of A46, the six isolates of A51 and the 12 isolates of A52/A53. The three novel species can be distinguished from known Vibrio species by several phenotypic features, including utilization and fermentation of various carbon sources, beta-galactosidase activity and fatty acid content (particularly of 12: 0, 14: 0, 14: 0 iso and 16: 0 iso) MH - Belgium MH - Mexico|Sinaloa MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000183268200018 L2 - FATTY-ACID COMPOSITION; FRAGMENT LENGTH POLYMORPHISM; BACTERIUM; DIFFERENTIATION; HYBRIDIZATION; DIVERSITY; OYSTERS; STRAINS; DNA SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():753-759 9633 UI - 9104 AU - Thompson FL AU - Li Y AU - Gomez-Gil B AU - Thompson CC AU - Hoste B AU - Vandemeulebroecke K AU - Rupp GS AU - Pereira A AU - De Bem MM AU - Sorgeloos P AU - Swings J AD - State Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumState Univ Ghent, BCCMTM LMG Bacteria Collect, B-9000 Ghent, BelgiumOcean Univ Qingdao, Coll Marine Life Sci, Qingdao 266003, Peoples R ChinaCIAD, Mazatlan Unit Aquacuture, Mazatlan 82000, Sinaloa, MexicoUniv Fed Santa Catarina, Dept Aquaculture, Lab Culture Marine Molluscs, Florianopolis, SC, BrazilState Univ Ghent, Lab Aquaculture, B-9000 Ghent, BelgiumState Univ Ghent, Artemia Reference Ctr, B-9000 Ghent, BelgiumThompson, FL, State Univ Ghent, Microbiol Lab, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - Vibrio neptunius sp nov., Vibrio brasiliensis sp nov and Vibrio xuii sp nov., isolated from the marine aquaculture environment (bivalves, fish, rotifers and shrimps) AB - The fluorescent amplified fragment length polymorphism (FAFLP) groups A5 (21 isolates), AB (6 isolates) and A23 (3 isolates) distinguished in an earlier paper(Thompson etal., Syst Appl Microbiol 24, 520-538, 2001) were examined in more depth. These three groups were phylogenetically related to Vibrio tubiashii, but DNA-DNA hybridization experiments proved that the three AFLP groups are in fact novel species. Chemotaxonomic and phenotypic analyses further revealed several differences among the 30 isolates and known Vibrio species. It is proposed to accommodate these isolates in three novel species, namely Vibrio neptunius (type strain LMG 20536(T); EMBL accession no. AJ316171; G + C content of the type strain 46.0 mol%), Vibric, brasiliensis (type strain LMG 20546 T; EMBL accession no. AJ316172; G + C content of the type strain 45.9 mol%) and Vibrioxuii (type strain LMG 21346(T); EMBL accession no. AJ316181; G + C content of the type strain 46.6 mol%). These species can be differentiated on the basis of phenotypic features, including fatty acid composition (particularly 14:0 iso, 14:0 iso 3-OH, 16: 0 iso, 16:0, 17:0 and 17:1 omega8c), enzyme activities and utilization and fermentation of various carbon sources MH - Belgium MH - Brazil MH - Mexico|Sinaloa MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000181169300037 L2 - FATTY-ACID COMPOSITION; BACTERIA; DNA; DIFFERENTIATION; HYBRIDIZATION; SYSTEM; AFLP SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():245-252 9634 UI - 8052 AU - Thurrell A AU - Jauregui-Renaud K AU - Gresty MA AU - Bronstein AM AD - HG Ctr Med Nacl La Raza, IMSS, Unidad Invest Med, Colonia La Raza, MexicoUniv London Imperial Coll Sci Technol & Med, Acad Dept Neurootol, Div Neurosci & Psychol Med, London, EnglandJauregui-Renaud, K, HG Ctr Med Nacl La Raza, IMSS, Unidad Invest Med, Av Vallejo & Jacarandas,CP02990, Colonia La Raza, Mexico TI - Vestibular influence on the cardiorespiratory responses to whole-body oscillation after standing AB - We assessed the influence of vestibular stimulation by whole-body oscillation in the yaw plane on the cardiorespiratory responses after a change of posture from sitting to standing. Eighteen healthy subjects (21-70 years old) and six patients with bilateral vestibular loss (4659 years old) were tested. For comparison, a subgroup, age matched to the patients, was created from the healthy group. After a 10-min rest, subjects who were sitting, back unsupported, stood on a platform affording en bloc head and body support. The platform was either static or oscillated at 0.1 Hz and 0.5 Hz (20degrees amplitude) for 2 min. Presentation of the three conditions was counterbalanced. Respiration, ECG, blood pressure and head position were recorded. During oscillation at 0.5 Hz, the respiratory responses were different between groups; healthy subjects showed a significant increase of the respiratory frequency (1.75 +/- 2.1 breaths/min), which was not observed in the patients (0.16 +/- 0.7 breaths/min) (p < 0.05, ANOVA). Absolute changes of heart rate and blood pressure were similar for the three conditions in all the subjects. However, healthy subjects showed a decrease of power spectrum density of the high-frequency ('respiratory') component of heart rate variability on standing during all three conditions. This response was variable among the patients and the age-matched group. The study shows that semicircular canal activation influences the respiratory rhythm during movements in the yaw plane in standing subjects. In addition, we observed that changes of the respiratory influence on heart rate variability during orthostatic stress are not affected by yaw oscillation or chronic vestibular loss, but may be affected by factors related to age MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0014-4819 UR - ISI:000183873600007 L2 - vestibular influence;cardiorespiratory responses;whole-body oscillation;bilateral vestibular loss;respiratory frequency;power spectrum density;BLOOD-PRESSURE VARIABILITY; ENTRAINMENT; VENTILATION; RESPIRATION; HUMANS; POSTURE SO - Experimental Brain Research 2003 ;150(3):325-331 9635 UI - 9321 AU - Ticktin T AU - Johns T AU - Xoca VC AD - Univ Hawaii, Dept Bot, Honolulu, HI 96822, USASch Dietet & Human Nutr, Ste Anne De Bellevue, PQ H9X 3V9, CanadaProyecto Sierra Santa Marta AC, Xalapa 91000, Veracruz, MexicoTicktin, T, Univ Hawaii, Dept Bot, 3190 Maile Way, Honolulu, HI 96822 USA TI - Patterns of growth in Aechmea magdalenae (Bromeliaceae) and its potential as a forest crop and conservation strategy AB - Forest cultivation of non-timber forest products (NTFPs) can provide economic incentives for local farmers to conserve forest environments. Assessing the agronomic and conservation potential of NTFP requires the integration of ecological information on optimal conditions for growth and reproduction with socioeconomic data on local farming economies and labor calendars. The terrestrial bromeliad, Aechmea magdalenae, is a typical NTFP harvested for its fiber in the rainforests of southern Mexico and Guatemala. In the buffer zone of Mexico's Los Tuxtlas Biosphere Reserve, cultivation trials using ramets transplanted from wild populations were initiated as a strategy to conserve buffer zone forests. We compared four measures of growth and survival of rosettes under the different light conditions of primary versus secondary forests; wild versus cultivated populations;.over different seasons; and propagated by different methods. We also contrasted initial costs, economic returns and labor demands for A. magdalenae cultivation with the other major land-uses in the region. Compared to cattle production, the major cause of deforestation in the region, A. magdalenae cultivation offers high economic returns and low labor and initial costs. Seasonal differences in rates of leaf and ramet production indicated that the optimal timing for harvest of these parts does not interfere with local farmers subsistence agricultural duties. Secondary forest rosettes grew faster than primary forest rosettes due to higher light conditions, and secondary forests were also more accessible to local farmers for cultivation. Cultivation implied ecological costs in terms of ramet severance and adaptation, but the less-dense growing conditions of cultivated plants resulted in higher growth rates by the end of the second year. A. magdalenae cultivation trials in Los Tuxtlas have illustrated that farmers will protect their forests from deforestation and forest fires when they hold economic value. (C) 2002 Elsevier Science B.V. All rights reserved MH - Canada MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000180646500001 L2 - Aechmea magdalenae;agroforestry;conservation;cultivation;non-timber forest products;CRASSULACEAN ACID METABOLISM; SECONDARY FORESTS; PROJECTION MATRIX; BRAZILIAN AMAZON; RAIN-FOREST; MANAGEMENT; PLANT; SIZE; PALM; ACCLIMATION SO - Agriculture Ecosystems & Environment 2003 ;94(2):123-139 9636 UI - 9281 AU - Tiscareno-Lechuga F AU - Tellez C AU - Menendez M AU - Santamaria J AD - Univ Zaragoza, Dept Ingn Quim & TMA, E-50009 Zaragoza, SpainInst Tecnol Celaya, Dept Ingn Quim, Celaya 38010, MexicoSantamaria, J, Univ Zaragoza, Dept Ingn Quim & TMA, E-50009 Zaragoza, Spain TI - A novel device for preparing zeolite - A membranes under a centrifugal force field AB - A new system is presented for the synthesis of zeolite membranes in the lumen of tubular supports. The support is placed inside a device that rotates around its longitudinal axis during the synthesis. Centrifugal forces produced by high rotational speed drive the crystals and crystal nuclei formed in the homogeneous phase towards the support surface, promoting the formation of a more continuous and dense layer. In addition, because of its design this device works as a centrifugal pump, creating a shear flow and renewing continuously the solution in contact with the growing zeolite layer. With this system, zeolite A membranes were reproducibly prepared on top of tubular alumina supports at 100degreesC, using seeded and unseeded hydrothermal synthesis, and different gel compositions. The water/alcohol pervaporation results obtained so far gave separation factors higher than 130 at water fluxes over 2.5 kg/(h m(2)). (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0376-7388 UR - ISI:000180691400012 L2 - zeolite A membrane;centrifugal field synthesis;NAA MEMBRANE; LIQUID-MIXTURES; CLEAR SOLUTION; A MEMBRANES; PERVAPORATION; SEPARATION; FILMS SO - Journal of Membrane Science 2003 ;212(1-2):135-146 9637 UI - 7805 AU - Tkatchouk E AU - Fomina L AU - Rumsh L AU - Fomine S AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, CU, Mexico City 04510, DF, MexicoRussian Acad Sci, Shemyakin & Ovchinnicov Inst Bioorgan Chem, Moscow 117871, RussiaFomine, S, Univ Nacl Autonoma Mexico, Inst Invest Mat, CU, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Role of (mu-oxo)dicopper(III) complexes in oxidative polymerization of phenol. A DFT study AB - A detailed quantum mechanical study of the generation of "controlled" radical species participating in regioselective polymerization of phenol has been carried out at the GGAII/LACVP* level of theory. There are two pathways of "controlled" radicals generation which represent phenol radicals stabilized by Cu(I)-amine complexes, postulated as active species in regioselective polymerization of phenol. One of them is the proton abstraction from phenol-Cu(II)-amine complexes by organic base available in the reaction mixture while the other is the hydrogen abstraction by (mu-oxo)dicopper(III) complexes from Cu(I)-phenol complexes. According to calculations mu-eta(2):eta(2)-peroxodicopper(II) complexes originally postulated as precursors for generating of "controlled" radicals are incapable of their generation. it seems it is (mu-oxo)dicopper(III) complexes that are responsible for "radical controlled" oxidative polymerization of phenol MH - Mexico|Distrito Federal MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000184398600026 L2 - CONTINUUM DIELECTRIC THEORY; SOLVATION FREE-ENERGIES; POLY(1,4-PHENYLENE OXIDE); MODEL; 4-PHENOXYPHENOL; PEROXIDASE; CLEAVAGE SO - Macromolecules 2003 ;36(15):5607-5612 9638 UI - 7073 AU - Tlenkopatchev MA AU - Vargas J AU - Lopez-Gonzalez MD AU - Riande E AD - Univ Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, SpainRiande, E, Univ Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360 CU, Mexico City 04510, DF, Mexico TI - Gas transport in polymers prepared via metathesis copolymerization of exo-N-phenyl-7-oxanorbornene-5,6-dicarboximide and norbornene AB - This work reports the synthesis of exo-N-phenyl-7-oxanorbornene-5,6-dicarboximide and its ring-opening metathesis copolymerization with norbornene to yield poly(exo-N-phenyl-7-oxanorbornene-5,6-dicarboximide-co-norbornene), with molar ratio 50/50. The glass transition temperature of the copolymer is 125 degreesC. Permeation and sorption processes of different gases (hydrogen, nitrogen, oxygen, carbon monoxide, carbon dioxide, methane, ethylene, and ethane) were measured in membranes prepared by casting from solutions of the copolymer in chloroform. The Langmuir capacity of the gases is relatively small due to the nearness of the glass transition temperature of the polymer to the working temperature. The solution of the most condensable gases in the continuous phase of the membrane is apparently described by the Flory-Huggins theory of polymer-diluent mixtures. In general, the membranes exhibit a reasonably high separation coefficient of hydrogen with respect to ethane, ethylene, nitrogen, and methane. The value of alpha(O-2/N-2) at room temperature lies in the vicinity of 5 MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000186306300041 L2 - ORGANOSILICON SUBSTITUENTS; GLASS-TRANSITION; SORPTION; POLYMERIZATION; POLYNORBORNENES; PERMEABILITY; POLYCARBONATES; SIMULATION; PERMEATION SO - Macromolecules 2003 ;36(22):8483-8488 9639 UI - 6659 AU - Toledano O AU - Riesgo-Tirado H AU - Lopez JA AU - Meaburn J AU - Bryce M AU - Holloway AJ AD - UNAM, Inst Astron, Ensenada 2800, Baja California, Mexico. Univ Manchester, Jodrell Bank Observat, Manchester M13 9PL, Lancs, England TI - A detailed kinematical study of the point-symmetric planetary nebula IC4634 AB - IC 4634 is a planetary nebula with a striking point-symmetric morphology. Strings of line-emitting knots, particularly bright in [N II] emerge from its bright Ha core. These strings bend in opposite directions on either side of the nucleus. We have obtained sub-arcsecond monochromatic imagery that neatly reveals its main morphological components. Additionally, we also present a comprehensive kinematic mapping of the nebula, consisting of several long-slit echelle positions across the main components of the nebula MH - United Kingdom MH - Mexico|Baja California T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400172 SO - 2003 ;(209):543-544 9640 UI - 8116 AU - Toloza JH AD - Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061, USAVirginia Polytech Inst & State Univ, Ctr Stat Mech & Math Phys, Blacksburg, VA 24061, USAToloza, JH, Univ Autonoma Estado Hidalgo, Ctr Invest Matemat, Ciudad Univ,Carretera Pachuca Tulancingo Km 4-5, Hidalgo 42074, Mexico TI - Exponentially accurate error estimates of quasiclassical eigenvalues. II. Several dimensions AB - We study the behavior of truncated Rayleigh-Schrodinger series for low-lying eigenvalues of the time-independent Schrodinger equation, in the semiclassical limit (h) over bar SE arrow0. In particular we prove that if the potential energy satisfies certain conditions, there is an optimal truncation of the series for the eigenvalues, in the sense that this truncation is exponentially close to the exact eigenvalue. These results were already discussed for the one-dimensional case in a previous article. This time we consider the multi-dimensional problem, where degeneracy plays a central role. (C) 2003 American Institute of Physics MH - Mexico|Hidalgo MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000183643000005 L2 - ASYMPTOTIC PERTURBATION-THEORY; BIRKHOFF NORMAL FORMS; EFFECTIVE STABILITY; INVARIANT TORI SO - Journal of Mathematical Physics 2003 ;44(7):2806-2838 9641 UI - 6381 AU - Torchynska T AU - Espinoza FGB AU - Goldstein Y AU - Savir E AU - Jedrzejewski J AU - Khomenkova L AU - Korsunska N AU - Yukhimchuk V AD - Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelInst Semicond Phys, UA-03028 Kiev, UkraineTorchynska, T, Inst Politecn Nacl, ESFM, Ed 9 UPALM, Mexico City 07738, DF, Mexico TI - Nature of visible luminescence of co-sputtered Si-SiOx systems AB - Photoluminescence (PL) spectra and Raman scattering spectra of Si-SiOx systems, prepared by radio frequency magnetron sputtering method and thermal annealed at 1150degreesC for creation of Si nano-crystallites, were investigated as a function of Si content and Si nano-crystallite sizes. It was shown that the PL spectrum of such systems consists of several bands with peak positions at 1.32-1.34, 1.42-1.51, 1.77, 2.05 and 2.30eV. The dependencies of these PL band parameters on concentration and size of Si nano-crystallites in the Si-SiOx system have been investigated and analyzed. The nature of radiative optical transitions for all PL bands is discussed. (C) 2003 Elsevier B.V. All rights reserved MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000188300200236 L2 - quantum dots;photoluminescence;POROUS SILICON; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE; ELECTROLUMINESCENCE; DEPENDENCE; SPECTRA; FILMS; BAND SO - Physica B-Condensed Matter 2003 ;340():1119-1123 9642 UI - 4713 AU - Torchynska TV AU - guilar-Hernandez J AU - Polupan G AU - Kolobov A AD - Natl Polytech Inst, SEPI, Mexico City 07738, DF, Mexico. Natl Inst Adv Ind Sci & Technol, LAOTECH, Tsukuba, Ibaraki 3058562, Japan TI - Optical and structural investigations of GeSiO2 systems AB - This paper presents the results of a photo luminescence investigation of silicon oxide films enriched by Ge. Photoluminescence peculiarities are analyzed both for "as prepared" silicon oxide films enriched by Ge (without Ge-nanocrystalls) and for films with Ge-nc, created during film annealing in inert atmosphere at 800degreesC. Raman scattering spectra and high-resolution transmission electronic microscopy are used for the confirmation the Ge-nc plane existing in the structures, and for an estimation of their sizes. The mechanism of photoluminescence is discussed as well MH - Japan MH - Mexico|Distrito Federal T3 - COMPOUND SEMICONDUCTORS 2002Institute of physics conference series PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - S;Article NT - SEnglishArticlettorch@esfm.ipn.mx0DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLANDINSTIT PHYS CONFER SERBAN50 AV - English IS - 0951-3248 UR - ISI:000222970500016 SO - 2003 ;():65-67 9643 UI - 4714 AU - Torchynska TV AU - Espinola JLC AU - Lopez HMA AU - Eliseev PG AU - Stintz A AU - Malloy KJ AU - Sierra RP AD - Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoUniv New Mexico, Ctr High Technol Mat, Albuquerque, NM 87131, USAIPN, CINVISTAV, Mexico City 07738, DF, MexicoTorchynska, TV, Inst Politecn Nacl, ESFM, Ed 9, Mexico City 07738, DF, Mexico TI - Thermal quenching of emission of self-assembled InAs quantum dots embedded into InGaAs/GaAs MQW AB - This paper presents the investigation of PL bands connected with ground (GS) and multi excited states (ES) in highly uniform self-assembled InAs QDs using variable temperatures. Investigated QDs are embedded in In0.15Ga0.85As/GaAs multi-quantum-well (MQW) structure. The types of GS and ES optical transitions are discussed as well MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - S;Article AV - English IS - 0951-3248 UR - ISI:000222970500017 SO - Compound Semiconductors 2002 2003 ;174():69-71 9644 UI - 6380 AU - Torchynska TV AU - Cano AD AU - Rodriguez MM AU - Khomenkova LY AD - Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoUPIBI, Natl Polytech Inst, Dept Math, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, UA-252028 Kiev, UkraineTorchynska, TV, Inst Politecn Nacl, ESFM, Ed 9,UPALM, Mexico City 07738, DF, Mexico TI - Hot carriers and excitation of Si/SiOx interface defect photoluminescence in Si nanocrystallites AB - In low-dimensional silicon wires and dots, as supposed earlier (Phys. Rev. B 65 (2002) 115313), hot carrier ballistic transport towards the Si/SiOx interface can enhance the excitation of oxide defect-related photoluminescence (PL) bands. This article presents new experimental results supporting the role of ballistic transport in bright visible photoluminescence of silicon nano-crystallites. The intensity dependences of the "red" and "orange" photoluminescence bands on excitation light wavelengths, diameters of Si nano-crystallites and surface area of porous layers have been analysed. The models of optical transitions at the excitation of both PL bands are discussed as well. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000188300200235 L2 - porous silicon;hot carrier ballistic transport;photoluminescence;POROUS SILICON PHOTOLUMINESCENCE; BALLISTIC TRANSPORT; QUANTUM DOTS; OXYGEN SO - Physica B-Condensed Matter 2003 ;340():1113-1118 9645 UI - 8094 AU - Torchynska TV AU - Espinola JLC AU - Losada EV AU - Eliseev PG AU - Stintz A AU - Malloy KJ AU - Sierra RP AD - Natl Polytech Inst, ESFM, UPALM, Mexico City 07738, DF, MexicoUniv New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106, USAIPN, CINVISTAV, Mexico City 07738, DF, MexicoTorchynska, TV, Natl Polytech Inst, ESFM, UPALM, Av Inst Politecn Nacl,Ed 9, Mexico City 07738, DF, Mexico TI - Thermal ionisation of ground and multiply excited states in InAs quantum dots embedded into InGaAs/GaAs MQW AB - The photoluminescence (PL) spectra of highly uniform self-assembled InAs quantum dots (QDs) embedded in In0.15Ga0.85 As multi-quantum-well (MQW) heterostructures have been investigated at variable temperatures. This paper presents the PL bands, connected with ground (GS) and multi-excited states (ES) in QDs. Not equidistant optical transitions have been revealed. Spectral peak shifts and PL intensity variations in the temperature range 12-220 K for all PL bands are analyzed. The activation energy of the temperature quenching processes for GS and 4 ES optical transitions in InAs QDs are measured. The mechanism of these processes and the positions of the energy levels in QDs are discussed as well. (C) 2003 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000183705900146 L2 - quantum effects;indium arsenide;photoluminescence;TEMPERATURE-DEPENDENCE; ELECTRONIC-STRUCTURE; LASERS; GAIN; WELL SO - Surface Science 2003 ;532():848-851 9646 UI - 8096 AU - Torchynska TV AU - Rodriguez MM AU - Khomenkova LY AD - Natl Polytech Inst Mexico, Dept Mat Sci, Fac Math & Phys, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, UA-252028 Kiev, UkraineTorchynska, TV, Natl Polytech Inst Mexico, Dept Mat Sci, Fac Math & Phys, Av Inst Politecn Nacl, Mexico City 07738, DF, Mexico TI - Ballistic effect and photoluminescence excitation in porous silicon AB - This article. presents experimental results supporting the role of the ballistic transport in strong "red" photoluminescence (PL) of porous silicon (PSi). It is shown that this PL band connects with emission of oxide-related defects at the Si/SiOx interface. The dependence of an intensity of interface-defect related photoluminescence on morphology and the average size of Si nano-crystallites on porous silicon surface has been investigated. The peculiarities of Raman and PL excitation spectra in dependence on the average size of Si nano-crystallites have been studied as well. Confirmation of ballistic effect role is important for understanding the photoluminescence mechanism in Si nano-crystallites and successful application of silicon low-dimensional structures in optoelectronics. (C) 2003 Published by Elsevier Science B.V MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000183705900207 L2 - silicon;porous solids;photoluminescence;surface defects;LUMINESCENCE SO - Surface Science 2003 ;532():1204-1208 9647 UI - 8185 AU - Torchynska TV AU - Polupan G AU - Gomez JP AU - Kolobov AV AD - Inst Politecn Nacl, SEPI, Mexico City 07738, DF, MexicoNatl Inst Adv Ind Sci & Technol, LAOTECH, Tsukuba, Ibaraki 3058562, JapanTorchynska, TV, Inst Politecn Nacl, SEPI, Ed 9 UPLAM, Mexico City 07738, DF, Mexico TI - Photoluminescence of Ge nano-crystallites embedded in silicon oxide AB - Photoluminescence (PL), transmission electron microscopy, Raman scattering spectra and extended X-ray absorption fine structure have been investigated in silicon oxide films enriched by Ge in as-grown state and after their thermal annealing at 800 degreesC. The dependences of PL peculiarities on the concentration of Ge, as well as on the existence (or absence) of Ge nano-crystallites in silicon oxide films are analyzed. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER ADVANCED TECHNOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000183607400050 L2 - nano-crystallites;photoluminescence;transmission electron microscopy;VISIBLE PHOTOLUMINESCENCE; SIO2 MATRIX; DEFECT SO - Microelectronics Journal 2003 ;34(5-8):541-543 9648 UI - 8288 AU - Torchynska TV AU - guilar-Hernandez J AU - Cano AID AU - Becerril-Espinoza FG AU - Goldstein Y AU - Many A AU - Jedrzejewskii J AU - Khomenkova LY AU - Bulakh BM AU - Scherbina LV AD - Natl Polytech Inst, Dept Mat Sci, Mexico City 07738, DF, MexicoHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelNatl Acad Sci Ukraine, Inst Semicond Phys, UA-252028 Kiev, UkraineTorchynska, TV, Natl Polytech Inst, Dept Mat Sci, Mexico City 07738, DF, Mexico TI - Photoluminescence and its excitation mechanisms in Si wires and dots AB - Investigations of photoluminescence, its temperature dependence, Raman scattering and IR absorption spectra were done for the study of the photoluminescence mechanism in porous silicon and Si enriched silicon oxide films. "Red" (1.6-1.7 eV) and "orange" (1.9-2.2 eV) photoluminescence bands are observed in both objects. Comparative investigations indicate that an oxide defect related mechanism is involved in the emission of PL bands in Si wires and silicon oxide films. Photoluminescence excitation mechanisms are discussed as well MH - Israel MH - Mexico|Distrito Federal MH - Ukraine PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000183219500016 L2 - POROUS SI; SILICON SO - Physica Status Solidi A-Applied Research 2003 ;197(2):382-387 9649 UI - 8511 AU - Torchynska TV AU - guilar-Hernandez J AU - Hernandez LS AU - Polupan G AU - Goldstein Y AU - Many A AU - Jedrzejewski J AU - Kolobov A AD - Natl Polytech Inst, Mexico City 07738, DF, MexicoHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelNatl Inst Adv Ind Sci & Technol, LAOTECH, Tsukuba, Ibaraki 3058562, JapanTorchynska, TV, Natl Polytech Inst, Mexico City 07738, DF, Mexico TI - Mechanism of photoluminescence of silicon oxide films enriched by Si or Ge AB - Photoluminescence peculiarities of silicon oxide films enriched by Si or Ge have been investigated. Photoluminescence (PL) and Raman spectra were measured before and after thermal annealing at 800 degreesC. The dependences of PL peculiarities on the concentration of Si and Ge, as well as on the existence (or absence) of Si (Ge) quantum dots (QDs) in silicon oxide films are analyzed for the photoluminescence mechanism study in the above-mentioned systems. (C) 2003 Elsevier Science B.V. All rights reserved MH - Israel MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Optics;Physics, Applied U5 - J;Article AV - English IS - 0167-9317 UR - ISI:000182725500014 L2 - silicon germanium nanocrystals;photoluminescence;VISIBLE PHOTOLUMINESCENCE; DEFECT; ELECTROLUMINESCENCE SO - Microelectronic Engineering 2003 ;66(1-4):83-90 9650 UI - 8667 AU - Torchynska TV AU - Rodriguez MM AU - Hernandez AV AU - Cheah KW AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoHong Kong Baptist Univ, Dept Phys, Hong Kong, Hong Kong, Peoples R ChinaTorchynska, TV, Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, Mexico TI - Ballistic regime and photoluminescence excitation in Si wires and dots AB - This article presents the experimental results supporting the role of the ballistic effect in strong "red" photoluminescence (PL) of silicon low-dimensional structures: wires and dots. The peculiarities of the PL and PL excitation spectra in dependence on the morphology of porous silicon layers and the size of Si nano-crystallites have been investigated. The porous silicon layers with different morphology were created by the variation of preparation regimes. The size of Si nano-crystallites is estimated using the atomic force microscopy and Raman scattering methods. The mechanisms of PL and PL excitation in Si low-dimensional structures are discussed as well. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000182376000100 L2 - porous silicon;ballistic effect;photoluminescence excitation;POROUS SILICON; RED PHOTOLUMINESCENCE; LUMINESCENCE SO - Journal of Luminescence 2003 ;102():551-556 9651 UI - 8668 AU - Torchynska TV AU - guilar-Hernandez J AU - Hernandez LS AU - Goldstein Y AU - Many A AU - Jedrzejewski J AU - Kolobov A AD - Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelNatl Polytech Inst, ESFM, Mexico City 07738, DF, MexicoNatl Inst Adv Ind Sci & Technol, LAOTECH, Tsukuba, Ibaraki 3058562, JapanGoldstein, Y, Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel TI - Photoluminescence of silicon oxide films enriched by Si or Ge AB - Photoluminescence (PL) and Raman spectra of silicon oxide films enriched by Si or Ge have been investigated before and after thermal annealing at 1150degreesC and 800degreesC, respectively. The dependences of PL peculiarities on the concentration of Si and Ge, as well as on the existence (or absence) of Si (Ge) quantum dots in silicon oxide films are analyzed. It is concluded that the PL spectrum of the oxide films enriched with Ge and at least the high-energy part of the spectrum of the films enriched with Si are due to defects in the silicon oxide films. (C) 2002 Elsevier Science B.V. All rights reserved MH - Israel MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0022-2313 UR - ISI:000182376000101 L2 - photoluminescence;nanocrystalline Ge;nanocrystalline Si;quantum confinement;VISIBLE PHOTOLUMINESCENCE; ELECTROLUMINESCENCE; DEFECT SO - Journal of Luminescence 2003 ;102():557-561 9652 UI - 9101 AU - Toriz G AU - Arvidsson R AU - Westin M AU - Gatenholm P AD - Chalmers Univ Technol, Dept Polymer Technol, SE-41296 Gothenburg, SwedenUniv Guadalajara, Dept Wood Cellulose & Paper Res, Guadalajara 44050, Jalisco, MexicoSwedish Inst Wood Technol Res, SE-11486 Stockholm, SwedenGatenholm, P, Chalmers Univ Technol, Dept Polymer Technol, SE-41296 Gothenburg, Sweden TI - Novel cellulose ester-poly(furfuryl alcohol)-Flax fiber biocomposites AB - Composites based entirely on renewable materials with flax fibers as reinforcement and cellulose acetate butyrate (CAB) as the matrix were prepared by compression molding. Scanning electron microscopy of the fracture surfaces showed insufficient penetration of the matrix into the fiber mat. Rheological measurements indicated that this was caused by the high melt viscosity of CAB. Various amounts of furfuryl alcohol (FA) were added to the matrix to control the melt viscosity of CAB. The melt viscosity was decreased dramatically by the introduction of FA, which acted as a CAB solvent and facilitated the impregnation of the flax fiber mats. The mechanical and dynamic thermal properties of composites based on flax mats and various amounts of CAB and FA were investigated. The addition of FA to CAB and the polymerization of FA resulted in a linearly increased modulus and an increase in the maximum fiber stress (strength) of flax composites but a decreased toughness. Dynamic mechanical thermal analysis (DMTA) showed that CAB/poly(furfuryl alcohol) (PFA) matrices were miscible because the glass-transition temperature (T-g) in the resulting blends occurred between the T-g of the homopolymers. DMTA also showed that increasing the amount of FA in the matrix substantially increased the storage modulus of the composites at temperatures lower than 80degreesC. It was possible to tune the storage properties of the composites through the addition of appropriate amounts of FA to the matrices. The CAB/PFA matrix showed behavior between that of thermoplastics and thermosets because of the miscibility and affinity of its components. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Jalisco MH - Sweden PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000181173500013 L2 - composites;biomaterials;viscosity;dynamic mechnical thermal analysis;mechanical properties;BIODEGRADABLE NATURAL COMPOSITES; FURFURYL ALCOHOL; POLYMERS; NANOCOMPOSITES; DISPERSION; INTERPHASE SO - Journal of Applied Polymer Science 2003 ;88(2):337-345 9653 UI - 6764 AU - Torrelles JM AU - Patel NA AU - Anglada G AU - Gomez JF AU - Ho PTP AU - Lara L AU - Alberdi A AU - Canto J AU - Curiel S AU - Garay G AU - Rodriguez LF AD - IEEC, CSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainINTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, SpainAcad Sinica, Inst Astron & Astrophys, Taipei 106, TaiwanUniv Granada, Dept Fis Teor & Cosmos, E-18071 Granada, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Chile, Dept Astron, Santiago, ChileUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico TI - Evidence for evolution of the outflow collimation in very young stellar objects AB - We present Very Long Baseline Array proper-motion measurements of water masers toward two young stellar objects (YSOs) of the W75 N star-forming region. We find that these two objects are remarkable for having a similar spectral type, being separated by 0."7 (corresponding to 1400 AU), and sharing the same environment, but with a strikingly different outflow ejection geometry. One source has a collimated, jetlike outflow at a 2000 AU scale, while the other has a shell outflow at a 160 AU scale expanding in multiple directions with respect to a central compact radio continuum source. This result reveals that outflow collimation is not only a consequence of ambient conditions but is something intrinsic to the individual evolution of stars and brings to light the possibility of noncollimated outflows in the earliest stages of YSOs MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - Taiwan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 26 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000187149400012 L2 - ISM : individual (W75);ISM : jets and outflows;masers;stars : formation;WATER MASERS; BIPOLAR OUTFLOW; STAR-FORMATION; CEPHEUS-A; REGIONS; W75N; EMISSION; SYSTEM; MOTION; SCALE SO - Astrophysical Journal 2003 ;598(2):L115-L119 9654 UI - 7069 AU - Torrero C AU - Regalado M AU - Rubio L AU - Ruiz-Marcos A AU - Salas M AD - Univ Nacl Autonoma Mexico, Dept Dev Neurobiol & Neurophysiol, Inst Neurobiol, Queretaro 04510, MexicoCSIC, Inst Cajal, E-28002 Madrid, SpainSalas, M, Univ Nacl Autonoma Mexico, Dept Dev Neurobiol & Neurophysiol, Inst Neurobiol, Campus Juriquilla, Queretaro 04510, Mexico TI - Neonatal food restriction induces hypoplasia in developing facial motor neurons of rats AB - The effects of neonatal food restriction upon the dendritic development of facial nucleus (IN) motor neurons of Wistar rats were analyzed. Rats neonatally underfed by daily (12 h) mother-litter separation in an incubator from 5-30 days after birth exhibited, in brain stem Golgi-Cox sections, significant reductions in the number and extension of stellate, triangular and bipolar FN neuronal dendritic prolongations with negligible effects upon perikarya measurements. Data suggest that in the underfed newborn, the ability of FN neurons to establish synaptic contacts with afferent fibers is reduced, which then interferes with their capacities for the integration and triggering of nerve impulses to modulate facial motor expression in response to sensory cues MH - Mexico|Queretaro MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences;Nutrition & Dietetics U5 - J;Article AV - English IS - 1028-415X UR - ISI:000186369500007 L2 - facial motor neurons;neonatal starvation;rats;dendritic prolongations;UNDERNOURISHED RATS; BRAIN-STEM; PROTEIN-DEPRIVATION; VISUAL-CORTEX; NUCLEUS; UNDERNUTRITION; TERM; PAIN SO - Nutritional Neuroscience 2003 ;6(5):317-324 9655 UI - 7949 AU - Torres-Acosta JFJ AU - Gutierrez-Ruiz EJ AU - Butler V AU - Schmidt A AU - Evans J AU - Babington J AU - Bearman K AU - Fordham T AU - Brownlie T AU - Schroer S AU - Camara E AU - Lightsey J AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Merida, Yucatan, MexicoUniv London Royal Vet Coll, Hatfield AL9 7TA, Herts, EnglandUniv Calif Davis, Sch Vet, Davis, CA 95616, USATorres-Acosta, JFJ, Univ Autonoma Yucatan, Fac Med Vet & Zootecnia, Km 15-5 Carretera Merida Xmatkuil, Merida, Yucatan, Mexico TI - Serological survey of caprine arthritis-encephalitis virus in 83 goat herds of Yucatan, Mexico AB - A survey was conducted between June and September 2000 in order to detect antibodies against caprine arthritis-encephalitis virus (CAEV) in 83 goat herds in the state of Yucatan, Mexico. A total of 1078 goats older than 4 months of age (mostly of Criollo breed) were sampled in the survey. An agarose gel immunodiffusion (AGID) test showed that three herds (3.6%) were seropositive to CAEV. In those herds a total of four animals sampled were seropositive (0.4%). All of the seropositive goats were imported to the Yucatan either from the neighboring Mexican state of Campeche or the United States of America (USA). These results highlight the need for implementation of control policies in Yucatan and careful monitoring of this goat population in order to ensure a continued low seroprevalence of CAEV. Policies of "rural development" and "genetic improvement" through animal imports, either governmental or private, must take into account the possibility of causing an increase in seroprevalence of CAEV in Yucatan. (C) 2003 Elsevier Science B.V. All rights reserved MH - United Kingdom MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000184037000013 L2 - CAEV seroprevalence;goat;Yucatan;INFECTION; ANTIBODY SO - Small Ruminant Research 2003 ;49(2):207-211 9656 UI - 8950 AU - Torres-Arreola L AU - Berkowitz G AU - Torres-Sanchez L AU - Lopez-Cervantes M AU - Cebrian ME AU - Uribe M AU - Lopez-Carrillo L AD - Social Secur Res Inst, CMN Century 21, Epidemiol & Hlth Serv Res Unit, Mexico City, DF, MexicoCUNY Mt Sinai Sch Med, Div Environm Hlth Sci, New York, NY 10029, USANatl Inst Hlth, Coordinat Gen, Mexico City, DF, MexicoNatl Polytech Inst, Ctr Res Adv Studies, Mexico City, DF, MexicoLopez-Carrillo, L, Av Univ No 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Preterm birth in relation to maternal Organochlorine serum levels AB - PURPOSE: To evaluate the associations of serum levels of p,p'-DDE and two other persistent organochlorine pesticides, beta-HCH and HCB, in relation to preterm birth. METHODS: During 1995 we performed a case-cohort study and 233 mothers were recruited at three large maternity hospitals in Mexico City. Serum levels were obtained shortly after delivery. RESULTS: A non-significant increased risk of preterm birth in relation to serum p,p'-DDE levels was observed. There was also a suggestion of an increased risk of preterm birth among women in the highest tertile of beta-HCH (adjusted odds ratio 1.85, 95% Cl = 0.94-3.66, p value for test of trend p = 0.08) compared with the lowest tertile. No association was found between HCB serum levels and preterm births. CONCLUSIONS: These findings suggest that p,p'-DDE and other organochlorine pesticides may pose a risk to preterm. birth in countries that continue to use such insecticides for malaria control MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 15 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1047-2797 UR - ISI:000181526000002 L2 - Mexico;organochlorine;pregnancy;preterm birth;serum levels;SPONTANEOUS-ABORTION; DDT; ASSOCIATION; PESTICIDES; PREMATURE SO - Annals of Epidemiology 2003 ;13(3):158-162 9657 UI - 7183 AU - Torres-Torres R AU - Murphy-Arteaga RS AU - Decoutere S AD - Natl Inst Astrophys Opt & Elect, INAOE, Dept Elect, Puebla, MexicoIMEC, B-3001 Louvain, BelgiumTorres-Torres, R, Natl Inst Astrophys Opt & Elect, INAOE, Dept Elect, Puebla, Mexico TI - MOSFET bias dependent series resistance extraction from RF measurements AB - A simple technique to determine MOSFET gate-bias dependent source and drain series resistances from experimental S-parameters is presented. This technique uses the measured data of a single device. The extracted data allow the accurate modelling of the bias dependence of the output resistance of the MOSFET up to 27 GHz MH - Belgium MH - Mexico|Puebla PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000186031500033 L2 - PARAMETER EXTRACTION SO - Electronics Letters 2003 ;39(20):1476-1478 9658 UI - 8938 AU - Torres-Torres R AU - Murphy-Arteaga RS AU - Decoutere S AD - Natl Inst Astrophys Opt & Elect INAOE, Dept Elect Engn, Puebla, MexicoIMEC, Interuniv Microelect Ctr, B-3001 Louvain, BelgiumTorres-Torres, R, Natl Inst Astrophys Opt & Elect INAOE, Dept Elect Engn, Puebla, Mexico TI - MOSFET gate resistance determination AB - A simple and reliable method to determine a MOSFET's gate resistance (R-in) directly from S-parameter measurements is presented. The extracted data agree well with the data predicted by transmission line theory and show that the main contribution of the transistor's input resistance (R-in) comes from the gate electrode resistance for devices with channel length below 0.2 mum MH - Belgium MH - Mexico|Puebla PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000181532400052 SO - Electronics Letters 2003 ;39(2):248-250 9659 UI - 8702 AU - Torres-Vera MA AU - Canas JA AD - UNAM, Inst Geog, Mexico City 04510, DF, MexicoUPC, Dept Ingn Terreno, Barcelona 08034, SpainTorres-Vera, MA, UNAM, Inst Geog, Cd Univ, Mexico City 04510, DF, Mexico TI - A lifeline vulnerability study in Barcelona, Spain AB - The term vulnerability is used as a measure of the damage suffered by a structure due to seismic activity. Vulnerability to ground movement is determined by the structure itself; therefore, the vulnerability of a system does not depend on the local seismic risk. This definition of vulnerability indicates that a structure may be vulnerable in spite of being located in a seismically safe area. Lifeline is an earthquake engineering term denoting those systems necessary for human life and urban function, without which large urban regions cannot exist. Lifelines basically convey food, water, fuel, energy, information, and other materials necessary for human existence from the production areas to the consuming urban areas. Prolonged disruption of lifelines such as the water supply or electric power for a city or urbanized region would inevitably lead to major economic losses, deteriorated public healt, and eventually population migration. Earthquakes are probably the most likely natural disaster that would lead to major lifeline disruption. The adequate operation of lifelines is vital for the economic development of regions under moderate to high seismic activity. After an earthquake, the proper operation of all vital systems is necessary, for instance hospitals for medical attention of the wounded and highways for communication and assistance for victims. In this work we apply the knowledge of pipeline vulnerability to the water supply system, telephone, gas, electricity, sanitary sewer pipelines (waste water), subway, and galleries systems in Barcelona. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Industrial;Operations Research & Management Science U5 - J;Article AV - English IS - 0951-8320 UR - ISI:000182233600010 L2 - pipelines;lifeline;earthquake engineering;seismic vulnerability SO - Reliability Engineering & System Safety 2003 ;80(2):205-210 9660 UI - 6968 AU - Torres CR AU - Castillo JE AD - San Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92812, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoCastillo, JE, San Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92812 USA TI - Stratified rotating flow over complex terrain AB - We present a full 3-dimensional time dependent curvilinear ocean model in boundary-fitted grids. The model solves the primitive non-linear Navier-Stokes equations under the Boussinesq approximation in a rotating system. Three-dimensional simulations are made for a stratified flow over two different topographic configurations. The results for the velocity and density fields are presented and discussed. (C) 2003 IMACS. Published by Elsevier B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000186602300020 L2 - stratified fluids;curvilinear model;TALL ISOLATED SEAMOUNT; GULF-OF-CALIFORNIA; TOPOGRAPHY; ENTRANCE; SPHERE; OCEAN SO - Applied Numerical Mathematics 2003 ;47(3-4):531-541 9661 UI - 7992 AU - Torres JLS AU - Atteia A AU - Claros MG AU - Gonzalez-Halphen D AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoUniv Malaga, Fac Ciencias, Dept Mol Biol & Bioquim, E-29071 Malaga, SpainGonzalez-Halphen, D, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-243, Mexico City 04510, DF, Mexico TI - Cytochrome f and subunit IV, two essential components of the photosynthetic bf complex typically encoded in the chloroplast genome, are nucleus-encoded in Euglena gracilis AB - The photosynthetic protist Euglena gracilis contains chloroplasts surrounded by three membranes which arise from secondary endosymbiosis. The genes petA and petD, encoding cytochrome f and subunit IV of the cytochrome bf complex, normally present in chloroplast genomes, are lacking from the chloroplast DNA (cpDNA) of E. gracilis. The bf complex of E. gracilis was isolated, and the identities of cytochrome f and subunit IV were established immunochemically, by heme-specific staining, and by Edman degradation. Based on N-terminal and conserved internal protein sequences, primers were designed and used for PCR gene amplification and cDNA sequencing. The complete sequence of the petA cDNA and the partial sequence of the petD cDNA from E. gracilis are described. Evidence is provided that in this protist, the petA and petD genes have migrated from the chloroplast to the nucleus. Both genes exhibit a typical nuclear codon usage, clearly distinct from the usage of chloroplast genes. The petA gene encodes an atypical cytochrome f with a unique insertion of 62 residues not present in other f-type cytochromes. The petA gene also acquired a region that encodes a large tripartite chloroplast transit peptide (CTP), which is thought to allow the import of apocytochrome f through the three-membrane envelope of E. gracilis chloroplasts. This is the first description of petA and petD genes that are nucleus-localized. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0005-2728 UR - ISI:000184061600005 L2 - chloroplast DNA;Euglena gracilis;photosynthetic complex;CHLAMYDOMONAS-REINHARDTII; B(6)F COMPLEX; TRANSIT PEPTIDE; ENDOPLASMIC-RETICULUM; MITOCHONDRIAL GENE; CLEAVAGE SITES; PROTEIN IMPORT; MESSENGER-RNA; BC(1) COMPLEX; SEQUENCE SO - Biochimica et Biophysica Acta-Bioenergetics 2003 ;1604(3):180-189 9662 UI - 8681 AU - Torres JRP AU - Cocke DL AD - Inst Technol Saltillo, Dept Met & Mat Sci, Saltillo 25000, Coahuila, MexicoLamar Univ, Dept Chem & Chem Engn, Beaumont, TX 77710, USATorres, JRP, Inst Technol Saltillo, Dept Met & Mat Sci, V Carranza 2400, Saltillo 25000, Coahuila, Mexico TI - Enhance cyanide recovery by using air-sparged hydrocyclone AB - Human health and environmental concerns dictate that industrial processes be improved or replaced. Recovery or recycling is an important activity that allows cyanide residue from the industrial processes to be re-used, reducing its production cost and disposal problems. In this regard, the air-sparged hydrocyclone (ASH) has been used as a reactor for the treatment of cyanide solutions for cyanide recycling by acidification/volatilization using the Mexican modification of the Mills-Crowe process. Aqueous cyanide-ion concentration can be reduced from 250 ppm to below 20 ppm in the ASH with recoveries greater than 80 % in a single stage MH - Mexico|Coahuila MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0930-7516 UR - ISI:000182344900016 L2 - WATER SO - Chemical Engineering & Technology 2003 ;26(4):503-507 9663 UI - 8268 AU - Torres M AU - Rojas RE AU - Ramachandra L AU - Thomas J AU - Canaday D AU - Harding CV AU - Boom H AD - Inst Nacl Enfermedades Resp, Dept Microbiol, Mexico City 14080, DF, MexicoCase Western Reserve Univ, Dept Med, Cleveland, OH 44106, USACase Western Reserve Univ, Dept Pathol, Cleveland, OH 44106, USA TI - Mycobacterium tuberculosis phagosome as site for major histocompatibility complex class-II antigen processing in human macrophages MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000182367001434 SO - Faseb Journal 2003 ;17(7):C307-C307 9664 UI - 8853 AU - Torres M AU - Adrados JP AU - Aragon JL AU - Cobo P AU - Tehuacanero S AD - Consejo Super Invest Cient, Inst Fis Aplicada, Madrid 28006, SpainUniv Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, MexicoConsejo Super Invest Cient, Inst Acust, Madrid 28006, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoTorres, M, Consejo Super Invest Cient, Inst Fis Aplicada, Serrano 144, Madrid 28006, Spain TI - Quasiperiodic Bloch-like states in a surface-wave experiment AB - Bloch-like surface waves associated with a quasiperiodic structure are observed in a classic wave propagation experiment which consists of pulse propagation with a shallow fluid covering a quasiperiodically drilled bottom. We show that a transversal pulse propagates as a plane wave with quasiperiodic modulation, displaying the characteristic undulatory propagation in this quasiperiodic system and reinforcing the idea that analogous concepts to Bloch functions can be applied to quasicrystals under certain circumstances MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000181728200017 L2 - LOCALIZATION; SCATTERING; FLUID SO - Physical Review Letters 2003 ;90(11): 9665 UI - 7389 AU - Torres P AU - Avila JG AU - de Vivar AR AU - Garcia AM AU - Marin JC AU - Aranda E AU - Cespedes CL AD - Natl Autonomous Univ Mexico, Inst Chem, Chem Ecol Lab, Mexico City 04510, DF, MexicoUniv Concepcion, Fac Nat Sci & Oceanog, Dept Bot, Concepcion, ChileNatl Autonomous Univ Mexico, UBIPRO FES Iztacala, Mexico City 04510, DF, MexicoUniv Autonoma Estado Morelos, Biotechnol Ctr, Biol Control Lab, Cuernavaca, Morelos, MexicoCespedes, CL, Natl Autonomous Univ Mexico, Inst Chem, Chem Ecol Lab, Mexico City 04510, DF, Mexico TI - Antioxidant and insect growth regulatory activities of stilbenes and extracts from Yucca periculosa AB - The methanol extract from the bark of Yucca periculosa F. Baker afforded 4,4'-dihydroxstilbene, resveratrol and 3.3',5.5'-tetrahydroxy-4-methoxystilbene and had growth regulatory activity against the Fall Army worm (Spodoptera frugiperda J.E. Smith, Lepidoptera:Noctuidae) an insect pest of corn. The most active compound was 3,3',5,5'-tetrahydroxy-4-methoxystilbene which had significant effects at 3 mug/g in diets. In addition to the inhibitory activity on bleaching of crocin induced by alkoxyl radicals, these compounds also demonstrated scavenging properties toward 2,2-diphenyl-1-picrylhydrazyl in TLC autographic and spectrophotometric assays. Our results indicate that these compounds could be involved in interference of sclerotization and moulting. These compounds appear to have selective effects on the pre-emergence metabolism of the insect. The results were fully comparable to known natural insect growth inhibitors such as gedunin and Cedrela extracts and have had a possible role as natural insecticidal agents. (C) 2003 Elsevier Ltd. All rights reserved MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000185421800014 L2 - stilbenes;insect-growth-regulation;insect pest;IPM;Spodoptera frugiperda;fall armyworm;Yucca periculosa;Agavaceae;ARMYWORM SPODOPTERA-FRUGIPERDA; TYROSINASE INHIBITORY-ACTIVITY; DEHYDROZALUZANIN-C; RESVERATROL; METABOLISM; FLAVONOIDS; MELIACEAE; MECHANISM; BARK SO - Phytochemistry 2003 ;64(2):463-473 9666 UI - 7189 AU - Torres R AU - Velando A AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 4510, DF, MexicoUniv Vigo, Fac Ciencias, Dept Ecol & Biol Anim, Vigo 36200, SpainTorres, R, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Apartado Postal 70-275, Mexico City 4510, DF, Mexico TI - A dynamic trait affects continuous pair assessment in the blue-footed booby, Sula nebouxii AB - Bright colours of male birds have often been shown to be the target of sexual selection through female choice, yet few studies have looked at the role of colour expressed after pairing on female motivation and behaviour. Here we analyse the role of an integumentary colour in the spectral range of 400-700 nm, the foot colour in male blue-footed boobies, Sula nebouxii, which is prominently displayed during pair courtship. Measurements early in the breeding season showed that foot colour of courting males is pale (high values of brightness) and has an aqua-blue chroma, and females in better body condition were mated to males with brighter feet. We carried out an experimental manipulation which modified the foot colour of males in courtship, making it closer to the foot colour of males in low nutritional state. We found that females paired to experimental males courted less and were less likely to copulate than females in the control group. Male behaviour was apparently unaffected by the manipulation; thus the change in female behaviour can be attributed exclusively to foot colour manipulation. These results strongly support the hypothesis of female preference for an integumentary colour and suggest that this dynamic trait is used as a male ornament after pairing MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 0340-5443 UR - ISI:000186034700008 L2 - dynamic traits;female courtship;integumentary colour;Sula nebouxii;FEMALE MATE CHOICE; RED JUNGLE FOWL; SEXUAL SELECTION; PARENTAL CARE; SPERM COMPETITION; FICEDULA-HYPOLEUCA; MATING PREFERENCES; BLUETHROATS AVES; PIED FLYCATCHER; MALE ORNAMENTS SO - Behavioral Ecology and Sociobiology 2003 ;55(1):65-72 9667 UI - 8363 AU - Tortajada A AU - Mestres R AU - Iglesias-Arteaga MA AD - Inst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Valencia, Dept Quim Organ, Valencia, SpainIglesias-Arteaga, MA, Inst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Synthesis of (Z)-5-decenol and (Z)-5-decenyl acetate, components of the sex pheromones of a variety of Lepidoptera AB - Two simple Wittig procedures for the synthesis of (Z)-5-decenol and (Z)-5-decenyl acetate based on the monoacetylation or monobromination of 1,5-pentanediol were followed MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0039-7911 UR - ISI:000183037900022 L2 - pheromones;Lepidoptera;Wittig reaction SO - Synthetic Communications 2003 ;33(10):1809-1814 9668 UI - 8199 AU - Tovar-Rojo F AU - Cabrera-Martinez RM AU - Setlow B AU - Setlow P AD - Univ Connecticut, Ctr Hlth, Dept Biochem, Farmington, CT 06032, USAInst Politecn Nacl, Dept Microbiol, Escuela Nacl Ciencas Biol, Mexico City, DF, MexicoInst Politecn Nacl, Dept Bioquim, Escuela Nacl Ciencas Biol, Mexico City, DF, MexicoSetlow, P, Univ Connecticut, Ctr Hlth, Dept Biochem, Farmington, CT 06032 USA TI - Studies on the mechanism of the osmoresistance of spores of Bacillus subtilis AB - Aims: To determine the reason that spores of Bacillus species, in particular Bacillus subtilis, are able to form colonies with high efficiency on media with very high salt concentrations. Methods and Results: Spores of various Bacillus species have a significantly higher plating efficiency on media with high salt concentration (termed osmoresistance) than do log or stationary phase cells. This spore osmoresistance is higher on richer media. Bacillus subtilis spores lacking various small, acid-soluble spore proteins (SASP) were generally significantly less osmoresistant than were wild-type spores, as shown previously (Ruzal et al. 1994). Other results included: (a) spore osmoresistance varied significantly between species; (b) the osmoresistance of spores lacking SASP was not restored well by amino acid osmolytes added to plating media, but was completely restored by glucose; (c) the osmoresistance of spores lacking SASP was restored upon brief germination in the absence of salt in a process that did not require protein synthesis; (d) significant amounts of amino acids generated by SASP degradation were retained within spores upon germination in a medium with high but not low salt; (e) slowing but not abolishing SASP degradation by loss of the SASP-specific germination protease (GPR) did not affect spore osmoresistance; (f) sporulation at higher temperatures produced less osmoresistant spores; and (g) spore osmoresistance was not decreased markedly by the absence of the stress sigma factor for RNA polymerase, sigma(B). Conclusions: Spore osmoresistance appears as a result of three major factors: (1) specific characteristics of spores and cells of individual species; (2) the precise sporulation conditions that produce the spores; and (3) sufficient energy generation by the germinating and outgrowing spore to allow the spore to adapt to conditions of high osmotic strength; the substrates for this energy generation can come from either the endogenous generation of amino acids by SASP degradation or from the spore's environment, in the form of a readily taken up and metabolized energy source such as glucose. Signficance and Impact of Study: These results provide information on the mechanisms of spore osmoresistance, a spore property that can be of major applied significance given the use of high osmotic strength with or without high salt as a means of food preservation MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1364-5072 UR - ISI:000183584600021 L2 - Bacillus subtilis;small;acid-soluble spore proteins;spore germination;spore metabolism;spore osmoresistance;spore outgrowth;GENERAL STRESS-RESPONSE; ACID-SOLUBLE PROTEINS; THURINGIENSIS ISRAELENSIS; BACTERIAL SPORULATION; MEGATERIUM SPORES; HEAT-RESISTANCE; GERMINATION; INJURY; SPHAERICUS; EXPRESSION SO - Journal of Applied Microbiology 2003 ;95(1):167-179 9669 UI - 7512 AU - Tovar J AU - Sayago-Ayerdi SG AU - Penalver C AU - Paredes-Lopez O AU - Bello-Perez LA AD - Inst Tecnol Acapulco, Acapulco 39905, Guerrero, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041A, VenezuelaIPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Guanajuato 36500, MexicoIPN, Ctr Desarrollo Prod Bioticos, Yautepec 62731, Morelos, MexicoBello-Perez, LA, Inst Tecnol Acapulco, Av Inst Tecnol S-N,Crucero Cayaco Puerto Marques, Acapulco 39905, Guerrero, Mexico TI - In vitro starch hydrolysis index and predicted glycemic index of corn tortilla, black beans (Phaseolus vulgaris L.), and Mexican "taco" MH - Mexico|Guanajuato MH - Mexico|Guerrero MH - Mexico|Morelos MH - Venezuela PB - ST PAUL: AMER ASSOC CEREAL CHEMISTS RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0009-0352 UR - ISI:000185309800007 L2 - RESISTANT STARCH; FLOURS; LEGUME; DIGESTIBILITY; DIGESTION; FRACTIONS; RAW SO - Cereal Chemistry 2003 ;80(5):533-535 9670 UI - 8894 AU - Tovmassian HM AU - Tiersch H AU - Chavushyan VH AU - Tovmassian GH AD - Inst Nacl Astrofis Opt & Elect, Puebla, MexicoSternwarte Konigsleiten, D-81477 Munich, GermanyUNAM, Inst Astron, Observ Astron Nacl, Ensenada 22860, Baja California, MexicoTovmassian, HM, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla, Mexico TI - Shakhbazian compact galaxy groups - II. Photometric and spectroscopic study of ShCG 376 AB - The results of the redshift measurements and of the detailed surface photometry in BVR of the compact group ShCG 376 are presented. The radial velocity dispersion, the virial mass, the total luminosity, the M/L ratio, and the crossing time of the group are estimated. The group consists of eight accordant redshift spiral galaxies. Four (or possibly five) of the group members have emission-line spectra. Such morphological content and the number of emission-line galaxies are very atypical for compact galaxy groups. There are signs of interaction between some members of the group. It is suggested that the irregular shape of the brightest galaxy No. 4 is probably due to interaction with other members of the group, particularly, the emission line galaxy No. 6 with a discordant redshift (Deltav = 2600 km s(-1)). It is speculated that the latter galaxy may be a infalling intruder to the group MH - Germany MH - Mexico|Baja California MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000181708800008 L2 - galaxies : clusters : general;galaxies : interactions;galaxies : kinematics and dynamics;galaxies : photometry;INFRARED-EMISSION; MERGERS SO - Astronomy & Astrophysics 2003 ;401(2):463-470 9671 UI - 9191 AU - Tovmassian HM AU - Zalinian VP AU - Silant'ev NA AU - Cardona O AU - Chavez M AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNAS, VA Ambartsumian Byurakan Astrophys Observ, Yerevan, ArmeniaPulkovo Astron Observ, St Petersburg, RussiaTovmassian, HM, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - The unified phenomenological model of light curves of stellar flares AB - We present a phenomenological model to explain a wide variety of stellar flares. We assume that a flare consists of a fast and relatively strong rise in brightness followed by a slow and fainter component. The latter is a result of re-radiation of the part of the energy of the prime flare by the photosphere of the star. The model is based primarily on geometrical consideration in which the position of the flare with respect to the stellar observable disk gives rise to different flare morphologies. In general, flares near the center of the disk consist of a very small pre-flare dimming. When the flare occurs towards the edge of the stellar disk the pre-flare dimming becomes fainter and eventually unobservable, while the re-radiated component also becomes fainter and redder. When the flare takes place on the backside of the stellar surface as seen by us, but near the limb, we may see only the re-radiated component MH - Armenia MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000180859000025 L2 - stars : general;STARS SO - Astronomy & Astrophysics 2003 ;399(2):647-651 9672 UI - 7833 AU - Trasvina-Castro A AU - de Velasco GG AU - Valle-Levinson A AU - Gonzalez-Armas R AU - Muhlia A AU - Cosio MA AD - Ctr Invest Cient & Educ Super Ensenada, La Paz 23050, BCS, MexicoOld Dominion Univ, Dept Ocean Earth & Atmospher Sci, Ctr Coastal Phys Oceanog, Norfolk, VA, USAIPN, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, BCS, MexicoCtr Invest Biol Noroeste SC, La Paz 23000, BCS, MexicoTrasvina-Castro, A, Ctr Invest Cient & Educ Super Ensenada, Campus Baja Calif Sur CICESE BCS,Miraflores 334 E, La Paz 23050, BCS, Mexico TI - Hydrographic observations of the flow in the vicinity of a shallow seamount top in the Gulf of California AB - An interdisciplinary study of the 'El Bajo de Espiritu Santo' (EBES) seamount in the Gulf of California leads to a number of conclusions on the interaction between the dynamics and the biology on a shallow seamount. The EBES seamount is a mid-latitude, shallow seamount where the frequency of the tidal forcing (K1 + M2) is superinertial. It is a place of high concentration of zooplankton, fish larvae and pelagic fish. A number of processes identified here are capable of locally enhancing productivity at very different time scales. Entrainment induced by vertical shear of the currents generates mixing on its summit. Three-dimensional tidal advection is important during spring tides. Surface hydrographic fields change quickly due to common, short-lived wind bursts, which force current jets out of the neighboring Bay of La Paz. Impinging large-scale flows perturb the vertical structure along the flanks of the seamount. Low frequency (1-3 weeks) cool and warm events, consequence of the large-scale dynamics in the Gulf of California, also reach the seamount. Recent consecutive El Nino y La Nina events produced large (2-3degreesC) interannual temperature differences. Not only biomass but diversity is also high, 104 different species of fish larvae have been identified here. This is thought to be due to the specific geographical location of the seamount. Outflows from the Bay of La Paz (and the variability observed in near-surface temperature record suggests that there are other phenomena) promote higher diversity of species by carrying larvae and zooplankton from regions biologically different to the EBES seamount. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California Sur MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000184500300013 L2 - seamount;dynamic instability;fronts;tidal advection;productivity;diversity;Gulf of California;El Nino;SCALLOPED HAMMERHEAD SHARK; SPHYRNA-LEWINI; TAYLOR-COLUMNS; MOVEMENTS; IMAGERY SO - Estuarine Coastal and Shelf Science 2003 ;57(1-2):149-162 9673 UI - 8119 AU - Trejo G AU - Ortega R AU - Meas Y AU - Chainet E AU - Ozil P AD - CIDETEQ, Parque Tecnol Sanfandila, Pedro Escobedo 76700, Queretaro, MexicoENSEEG, INPG, Lab Electrochim & Physicochim Mat & Interfaces, UMR CNRS 5631,Associe UJF, F-38402 St Martin Dheres, FranceTrejo, G, CIDETEQ, Parque Tecnol Sanfandila, AP 064, Pedro Escobedo 76700, Queretaro, Mexico TI - Effect of benzylideneacetone on the electrodeposition mechanism of Zn-Co alloy AB - The influence of benzylideneacetone (BA) on the mechanism of Zn-Co alloy electrodeposition onto AISI 1018 steel was studied in chloride acidic solutions. Results indicate that BA modifies the exchange current densities of zinc and cobalt such that the alloy is electrodeposited via a normal codeposition mechanism. Analysis of the deposits by Auger spectroscopy and X-ray diffraction shows that BA increases the cobalt concentration in the electrodeposited alloys and gives deposits with a constant concentration pro. le of both Zn and Co. BA also inhibits the formation of zinc hydroxide in the initial deposition stages, which supports the proposed mechanism of normal codeposition. Finally, it is shown that BA modifies the morphology of the deposits by inducing a reduction in the cluster size, leading to compact, smooth and shiny coatings MH - France MH - Mexico|Queretaro PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Electrochemistry U5 - J;Article AV - English IS - 0021-891X UR - ISI:000183703200004 L2 - additives;benzylideneacetone;electrodeposition;zinc-cobalt alloys;PLUS COBALT ALLOYS; ANOMALOUS DEPOSITION; ZINC; COATINGS SO - Journal of Applied Electrochemistry 2003 ;33(5):373-379 9674 UI - 7563 AU - Trethowan RM AU - van Ginkel M AU - Ammar K AU - Crossa J AU - Payne TS AU - Cukadar B AU - Rajaram S AU - Hernandez E AD - CIMMYT, Int maize & Wheat Improvement Ctr, Wheat Program, Mexico City 06600, DF, MexicoCIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoMonsanto Co, Harbstadt, IN, USATrethowan, RM, CIMMYT, Int maize & Wheat Improvement Ctr, Wheat Program, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Associations among twenty years of international bread wheat yield evaluation environments AB - Understanding the way different environments differentiate cultivars for yield allows the plant breeder to optimize choice of parents, germplasm screening, yield testing, and resource use within the target region. To determine the associations among yield testing environments, wheat (Triticum aestivum L.) yield data from 963 replicated trials sown across a 20-yr period were analyzed by means of pattern analysis and the shifted multiplicative model (SHMM) to group sites within and across years. Pattern analysis identified four primary dusters of sites and four representative locations within these clusters were identified by squared Euclidean distances. Group-1 represented primarily Mediterranean and West Asian locations and South American sites. Group-2 was comprised of generally warmer sites in southern and eastern Asia. Group-3 comprised higher rainfall locations in South America and eastern Africa and Group-4 represented cooler sites in South America and West Asia. The respective key locations for each of the four groups were Sakha, Egypt; Quezaltenango, Guatemala; Londrina, Brazil; and Pirsabak, Pakistan. The four key sites were then used to examine site clusters within each year by SHMM. The sites at Pirsabak and Sakha associated best across all global wheat-growing regions where a combined total of 700 of 1117 (62%) possible clusters with other global wheat locations were realized. This compared with 52% for Quezaltenango and 38% for Londrina. Factors with a primary influence on site clustering were cropping season moisture availability and temperature. Genotype performance at Pirsabak and Sakha can be used to enhance genetic progress in a range of related wheat growing environments thereby improving the effectiveness of global wheat breeding MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000185174300017 L2 - SHIFTED MULTIPLICATIVE MODEL; WINTER-WHEAT; DURUM-WHEAT; RANK-CHANGE; SITES; CULTIVARS; TRIALS SO - Crop Science 2003 ;43(5):1698-1711 9675 UI - 7908 AU - Trevino C AU - Luna E AU - Mendez F AU - Higuera FJ AD - Natl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoInst Mexicano Petr, Dept Yacimientos Naturalmente Fracturados, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Fac Ingn, Mexico City 04510, DF, MexicoUniv Politecn Madrid, Escuela Tecn Super Ingn Aeronaut, E-28040 Madrid, SpainTrevino, C, Natl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Natural convective conjugate cooling mechanism in vertical fins AB - An analysis is presented of the conjugate free convective heat transfer from a vertical, thermally thin fin heated from above to the surrounding fluid. An estimate is presented of the thermal penetration length over which the temperature of a very long fin would decrease from its maximum value at the top to the ambient temperature of the fluid. The solution of the problem is shown to depend on two nondimensional parameters: the Prandtl number of the fluid and the ratio s of the thermal penetration length to the actual length of the fin. The overall heat transfer rate for thermally short fins (large s) is practically independent of the fin material, whereas it depends on the thermal conductivity of the fin when s is small. Numerical and asymptotic results are given covering the whole range of s MH - Mexico|Distrito Federal MH - Spain PB - RESTON: AMER INST AERONAUT ASTRONAUT RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Engineering, Mechanical U5 - J;Article AV - English IS - 0887-8722 UR - ISI:000184193600014 L2 - HEAT-TRANSFER; LONG SO - Journal of Thermophysics and Heat Transfer 2003 ;17(3):396-401 9676 UI - 8441 AU - Trevino C AU - Higuera FJ AU - Linan A AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUPM, ETSI Aeronaut, Madrid 28040, SpainTrevino, C, Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Transient ignition and combustion of diluted hydrogen/air mixtures by a thin catalytic wire AB - This paper reports on a study of transient ignition and combustion of hydrogen/air mixtures by a heated, thin catalytic wire in a natural convection environment. Modeling of the process is accomplished via a reduced set of heterogeneous kinetic processes which include dissociative adsorption and desorption of both reactants, three fast surface reactions of the Langmiur-Hinshelwood type, and the desorption reaction of the adsorbed product, H2O(S). The overall surface reaction rate is found to be limited by the adsorption rate of molecular oxygen, which depends on the concentration of molecular oxygen close to the surface of the wire and the distribution of empty sites in the catalyst. The analysis allows the determination of the critical conditions for ignition and the ignition delay time as a function of the important physicochemical parameters. The resulting wire temperatures and the critical value of the external heating rate at ignition are computed. The analysis shows how the ignition temperature increases as the external heating rate increases. The configuration dependence of the ignition temperature is taken as an indication that the use of a critical Damkohler number provides a better ignition condition than the ignition temperature concept. A self-sustained combustion regime for strong diluted mixtures is described MH - Mexico|Distrito Federal MH - Spain PB - PITTSBURGH: COMBUSTION INST RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Energy & Fuels;Engineering, Chemical;Engineering, Mechanical U5 - J;Article AV - English IS - 0082-0784 UR - ISI:000182866100120 L2 - BOUNDARY-LAYER IGNITION; FLAT-PLATE; PLATINUM; OXYGEN; FUEL; FLOW SO - Proceedings of the Combustion Institute 2003 ;29():981-988 9677 UI - 5873 AU - Trifunovic S AU - Cordova H AU - Crossa J AU - Pandey S AD - Monsanto Co, Waterman, IL 60556, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoTrifunovic, S, Monsanto Co, 8350 Minnegan Rd, Waterman, IL 60556, USA TI - Head-to-head and stability analysis of maize (Zea mays L.) inbred lines AB - The most important breeding method for development of maize (Zea Mays L.) inbred lines is selection within either F-2 or backcross populations. Only inbred lines that possess high breeding values for yield and other traits of interest warrant recycling in breeding programs. Tools for estimation of the genetic merit of inbred lines previously developed are not economically feasible to use in today's breeding programs. In this paper, we propose "head-to-head comparisons of inbred lines" and "stability analysis of inbred lines" as new tools for detection of valuable germplasm for recycling in pedigree breeding programs. Two comparisons between new lines and the best tester lines were performed using these new tools to estimate general combining abilities of new line in comparisons with the best tester line, determine their strengths and weaknesses, and to justify initiation of pedigree projects with crosses between them. The proposed methods can be easily incorporated into any breeding program. They enable simultaneous examination of data from different years and experiments, and are more cost- and time-efficient than diallel or design II methods MH - Mexico|Distrito Federal MH - USA PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 1 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000220468000003 L2 - corn;breeding methods;testers;pedigree selection;SINGLE-CROSS PERFORMANCE; UNBIASED PREDICTION; FAVORABLE ALLELES; POPULATIONS; YIELD SO - Maydica 2003 ;48(4):263-269 9678 UI - 8433 AU - Trinidad MA AU - Curiel S AU - Canto J AU - D'Alessio P AU - Rodriguez LF AU - Torrelles JM AU - Gomez JF AU - Patel N AU - Ho PTP AD - Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Astron Inst, Morelia 58089, Michoacan, MexicoCSIC, Inst Estudis Espacials Catalunya, E-08034 Barcelona, SpainINTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USATrinidad, MA, Univ Nacl Autonoma Mexico, Astron Inst, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Observations of water masers and radio continuum emission in AFGL 2591 AB - We report results of continuum (1.3 and 3.6 cm) and H2O maser line high angular resolution observations, made with the Very Large Array (VLA) in the A configuration, toward the star-forming region AFGL 2591. Three radio continuum sources (VLA 1, VLA 2, and VLA 3) were detected in the region at 3.6 cm, and one source (VLA 3) at 1.3 cm. VLA 1 and VLA 2 appear resolved and their spectral indices suggest free-free emission from optically thin H II regions. VLA 3 is elongated in the east-west direction, along the axis of the bipolar molecular outflow observed in the region. Its spectral energy distribution is consistent with it being a similar to200 AU optically thick disk plus a photoionized wind. In addition, we detected 85 water maser spots toward the AFGL 2591 region, which are distributed in three main clusters. Two of these clusters are spatially associated with VLA 2 and VLA 3, respectively. The third cluster of masers, including the strongest water maser of the region, does not coincide with any known continuum source. We suggest that this third cluster of masers is excited by an undetected protostar that we predict to be located similar or equal to0."5 (500 AU) north from VLA 3. The maser spots associated with VLA 3 are distributed along a shell-like structure of 0."01 size, showing a peculiar velocity-position helical distribution. We propose that VLA 3 is the powering source of the observed molecular outflow in this region. Finally, we support the notion that the AFGL 2591 region is a cluster of B0-B3 type stars MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000182943500030 L2 - HII regions;ISM : individual (AFGL 2591);ISM : jets and outflows;masers;stars : formation;YOUNG STELLAR OBJECTS; ACCRETION DISKS; MOLECULAR OUTFLOWS; VLA OBSERVATIONS; H2O MASERS; CEPHEUS-A; STAR; SYSTEM; GL-2591; JET SO - Astrophysical Journal 2003 ;589(1):386-396 9679 UI - 6683 AU - Tripathi SC AU - Sayre KD AU - Kaul JN AU - Narang RS AD - DWR, Agron, Karnal 132001, Haryana, IndiaCIMMYT, Wheat Programme, Mexico City 06600, DF, MexicoPAU, Dept Agron, Ludhiana, Punjab, IndiaTripathi, SC, DWR, Agron, PB 158, Karnal 132001, Haryana, India TI - Growth and morphology of spring wheat (Triticum aestivum L.) culms and their association with lodging: effects of genotypes, N levels and ethephon AB - Lodging behavior and morphological characters of 12 spring wheat (Triticum aestivum L.) genotypes (four Indian cultivars and eight Mexican cultivars/CIMMYT advanced lines) were studied under disease free condition with different N rates (180, 240 and 300 kg ha(-1)), and at 300 N, with ethephon (480 g ha(-1)) application at CIMMYT (Centro Internacional de Mejoramiento de Maiz y Trigo), near Ciudad Obregon, Sonora, Mexico, during 1997-1998 and 1998-1999. In both years, the crop lodged, mainly by buckling or bending of the culms, 25-30 days after anthesis. Ethephon application at DC 38 prevented lodging and was associated with reduction in plant height (10.2%), peduncle length (14.2%), length of third internode (8.6%). It also simultaneously increased tillers m(-2)(9.1%), stem wall thickness for the first (4.3%), second (6.3%) and third (8.1%) internodes and peduncle (3.6%) when compared at the same N level. Varietal differences in lodging behavior were significant during both years. The lodging tolerant genotype, Baviacora 92, had 31.9, 34.0, 40.7 and 34.1 % larger diameter for the first, second, third intemodes and peduncle, respectively, when compared to HD 2329, one of the most lodging susceptible genotypes. Furthermore, Baviacora 92 had first, second, third intemode and peduncle stem walls that were also 31.7, 33.5, 35.4 and 37.1% greater, respectively, than Pavon 76, which had the thinnest stem walls. Genotypic correlations were better than phenotypic correlations, which suggested that environmental effects did not reinforce the genotypic effects rather they weakened them. Tillers m(-2) correlated (r = 0.89, P < 0.01) significantly positively while stem diameter and wall thickness correlated significantly negatively with lodging score. Diameter of different intemodes including the peduncle, weight per stem and spike also correlated significantly negatively with tillers m(-2). Simple linear regression explained that 79% of the variation in lodging score could be due to tillers M and 49-65% due to diameter of different intemodes. The best sub-set of the regression showed that number of tillers m-2 and/or stem diameter of internodes were the key variables when deciding two or three important characters for selecting for varieties with lodging resistance. Three variables such as stem diameter of first, second internode and length of first intemode or tillers M height and length of stem or tillers M stem diameter of first, second intemode together explained about 89-91% of the variation in lodging score. Therefore, it was suggested that selection for lodging resistant cultivars should emphasize larger stem diameter and wall thickness of basal internodes and fewer tillers per unit area with heavy spikes. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000187406400004 L2 - YIELDING IRRIGATED WHEAT; PLANT SPACING INFLUENCE; NEW-SOUTH-WALES; SOWING DATE; RESISTANCE; CULTIVARS; NITROGEN; BARLEY SO - Field Crops Research 2003 ;84(3):271-290 9680 UI - 7046 AU - Tripathi SC AU - Sayre KD AU - Kaul JN AD - DWR, Karnal, Haryana, IndiaCIMMYT, Wheat Programme, Mexico City 06600, DF, MexicoPAU, Dept Agron, Ludhiana, Punjab, IndiaTripathi, SC, DWR, PB 158,PIN 132001, Karnal, Haryana, India TI - Fibre analysis of wheat genotypes and its association with lodging: Effects of nitrogen levels and ethephon AB - Present study involved 12 lodging tolerant/ susceptible spring wheat (Triticum aestivum L.) genotypes grown at 180, 300 kg N/ha and 480 g/ha ethephon application in latter N rate at CIMMYT (Centro Internacional de Mejoramiento de Maiz y Trigo), Mexico during 1997-98 and 1998-99 under disease free and irrigated condition. During both the years, crop lodged 25 to 30 days after anthesis in varying degrees at different N levels whereas, ethephon application at DC 38 prevented lodging and decreased the ADF (acid detergent fibre), cellulose and lignin content by 8.47, 8.81 and 5.56 %, respectively in the basal internode and increased K content of 2(nd) internode by 9.6 % as compared to without its application, However, increasing N rates from 180 to 300 kg/ha determined non-significant difference for ADF, cellulose, lignin and K concentrations in the 2(nd) and 3(rd) internodes. ADF and cellulose concentrations of 3(rd) internode were higher by 3.2-3.8 % and 4.7-5.3 %, respectively when compared with 2(nd) internode whereas 2(nd) internode determined 1.9-4.2 % higher lignin and 12.3-13.4 % more potassium contents than the 3(rd) internode at different N levels. Pooled analysis indicated that genotypic differences for ADF, cellulose, lignin and K contents were significant for both the internodes. ADF, cellulose and lignin contents for the 2(nd) and the 3(rd) internodes were negatively correlated with lodging score and in combined analysis of 3(rd) internode its phenotypic correlation was - 0.53, - 0.57 and - 0.61 with lodging score, respectively. Also, from multiple correlations study it was observed that ADF, cellulose and lignin contents had a positive impact among themselves and their cumulative effect in turn might be preventing lodging. Therefore, it could be said that higher ADF, cellulose and lignin content of basal internode were important parameters in developing a lodging resistant cultivar under irrigated and high N conditions MH - India MH - Mexico|Distrito Federal PB - SZEGED: CEREAL RES INST RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0133-3720 UR - ISI:000186385100026 L2 - spring wheat;N levels;ethephon;lodging;ADF;cellulose;lignin and K contents;GROWTH; BARLEY SO - Cereal Research Communications 2003 ;31(3-4):429-436 9681 UI - 8577 AU - Tritlla J AU - Cardellach E AD - UNAM, Ctr Geociencias, Santiago De Queretaro 76230, MexicoUAB, Fac Ciencies, Dept Geol, Bellaterra 08193, SpainTritlla, J, UNAM, Ctr Geociencias, Campus Juriquilla,Carr 57,QRO SLP Km 15-5, Santiago De Queretaro 76230, Mexico TI - Ba-Hg deposits in the Espadan ranges (Iberian Chain, Eastern Spain): an example of Cretaceous fluid circulation and Alpine overprinting AB - In the Espadan Ranges, two hydrothermal events with different fluid chemistry and temperature have been identified. A high salinity (15 to 22 wt.% eq. NaCl) and moderate to high temperature (140-180 degreesC) fluid flowed during Santonian times through deep, listric faults that developed during a tectonically extensional period. Barite and Hg-Sb-Cu-Ag sulfosalt vein type mineralizations formed due to the mixing between these hot brines and sulfate-rich waters. During the Alpine compression, a second fluid of lower salinity (5 wt.% eq. NaCl) and higher temperatures (up to 240 degreesC) flowed through the preexisting faults, oxidizing the hypogene sulfosalt paragenesis. The presence of powder-like cinnabar, Cu carbonates and iron oxides would be related to the oxidation of the primary sulfides during the second fluid flow event. (C) 2003 Elsevier Science B.V All rights reserved MH - Mexico|Queretaro MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000182582800104 L2 - hydrothermal circulation;santonian;ore deposition;alpine overprinting;ORIGIN SO - Journal of Geochemical Exploration 2003 ;78-9():579-584 9682 UI - 4535 AU - Trjapitzin VA AU - Triapitsyn SV AD - Univ Autonoma Tamaulipas, UAM Agron & Ciencias, Ctr Invest, Tamaulipas 87149, MexicoUniv Calif Riverside, Dept Entomol, Entomol Res Museum, Riverside, CA 92521, USATrjapitzin, VA, Univ Autonoma Tamaulipas, UAM Agron & Ciencias, Ctr Invest, Ciudad Victoria, Tamaulipas 87149, Mexico TI - A new species of Homalotylus (Hymenoptera : Encyrtidae) from Mexico, parasitoid of Azya orbigera orbigera (Coleoptera : Coccinellidae) AB - A new species of the encyrtid wasp genus Homalotylus Mayr is described from the state of Tamaulipas in Mexico. The type series of H. shuvakhinae sp. n. was reared from the coccinellid Azya orbigera orbigera (Mulsant), a predator of the coccid Protopulvinaria pyriformis (Cockerell). A key to the three related species from the flaminius group of Homalotylus is provided MH - Mexico|Tamaulipas MH - USA PB - PHILADELPHIA: AMER ENTOMOL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0013-872X UR - ISI:000223541000003 L2 - Encyrtidae;Homalotylus;taxonomy;Azya orbigera orbigera;parasitoid;Mexico SO - Entomological News 2003 ;114(4):192-196 9683 UI - 8180 AU - Troiani HE AU - Miki-Yoshida M AU - Camacho-Bragado GA AU - Marques MAL AU - Rubio A AU - Ascencio JA AU - Jose-Yacaman M AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USACtr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv Pais Vasco, Fac Quim, Dpto Fis Mat, Ctr Mixto,CSIC, San Sebastian 20018, SpainDonostia Int Phys Ctr, San Sebastian 20018, SpainInst Mexicano Petr, Programa Ductos, Mexico City 07730, DF, MexicoUNAM, Inst Fis, Mexico City, DF, MexicoJose-Yacaman, M, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - Direct observation of the mechanical properties of single-walled carbon nanotubes and their junctions at the atomic level AB - Starting from an amorphous C film, single-walled carbon nanotubes were obtained in situ in a high-resolution electron microscope by the combined effect of irradiation and axial strain. Ductile nanotubes developed either a junction or a linear chain of C atoms before failure. These facts have been put in direct evidence for the first time. Tight-binding calculations indicate that the bonding in the linear chain is of a cumulene type MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Spain MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000183521500013 L2 - ELASTIC PROPERTIES; YOUNGS MODULUS; STRENGTH; CLUSTERS; MICROSCOPY; STABILITY; COLLAPSE; FRACTURE; STRAIN; CHAINS SO - Nano Letters 2003 ;3(6):751-755 9684 UI - 9005 AU - Troiani HE AU - Camacho-Bragado A AU - Armendariz V AU - Torresday JLG AU - Yacaman MJ AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, CNM, Austin, TX 78712, USAUniv Texas, Dept Chem, El Paso, TX 79968, USAUNAM, Inst Fis, Mexico City, DF, MexicoYacaman, MJ, Univ Texas, Dept Chem Engn, Austin, TX 78712, USA TI - Synthesis of carbon onions by gold nanoparticles and electron irradiation MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000181441100001 L2 - FULLERENES; PARTICLES SO - Chemistry of Materials 2003 ;15(5):1029-1031 9685 UI - 6736 AU - Tsai CJ AU - Yang SF AU - Tibshirani RJ AU - Guarner J AU - Mohar A AU - Herrera-Goepfert R AU - Parsonnet J AD - Stanford Univ, Sch Med, Stanford, CA 94305, USACtr Dis Control & Prevent, Atlanta, GA, USAInst Nacl Cancerol, Tlalpan, Mexico TI - Changes in gene expression in intermediate endpoints of gastric cancer: A randomized, placebo-controlled trial of Helicobacter pylori eradication therapy MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1055-9965 UR - ISI:000187153300018 SO - Cancer Epidemiology Biomarkers & Prevention 2003 ;12(11):1280S-1280S 9686 UI - 6264 AU - Tumlin JA AU - Cardiel MH AU - Furie RA AU - Wallace DJ AU - Hura C AD - San Antonio Kidney Dis Ctr, Res Ctr, San Antonio, TX, USAEmory Univ, Div Renal, Atlanta, GA 30322, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoN Shore Univ Hosp, Manhasset, NY, USAWallace Rheumat Study Ctr, Los Angeles, CA, USA TI - Renal flare in SLE patients with impaired renal function in a RCT of LJP 394 MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219102081 SO - Journal of the American Society of Nephrology 2003 ;14():449A-449A 9687 UI - 7691 AU - Turbat-Herrera EA AU - de Benedetti A AU - Herrera GA AU - Tucker A AU - Dominguez-Malagon H AU - Vilchis JC AU - Matthews-Greer J AD - LSU, Hlth Sci Ctr, Shreveport, LA, USAOverton Brooks VA Med Ctr, Shreveport, LA, USAInst Cancerol, Mexico City, DF, Mexico TI - Eukaryotic translation initiation factor 4E could be a useful marker for cervical neoplasia MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Pathology U5 - J;Meeting Abstract AV - English IS - 0893-3952 UR - ISI:000180720100978 SO - Modern Pathology 2003 ;16(1):212A-213A 9688 UI - 7809 AU - Turbat-Herrera EA AU - de Benedetti A AU - Herrera GA AU - Tucker A AU - Dominguez-Malagon H AU - Vilchis JC AU - Matthews-Greer J AD - LSU, Hlth Sci Ctr, Shreveport, LA, USAOverton Brooks VA Med Ctr, Shreveport, LA, USAInst Cancerol, Mexico City, DF, Mexico TI - Eukaryotic translation initiation factor 4E could be a useful marker for cervical neoplasia MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Pathology U5 - J;Meeting Abstract AV - English IS - 0023-6837 UR - ISI:000180732500981 SO - Laboratory Investigation 2003 ;83(1):212A-213A 9689 UI - 8390 AU - Turell MJ AU - O'Guinn ML AU - Navarro R AU - Romero G AU - Estrada-Franco JG AD - Agr Minist, Anim Hlth Div, Chiapas, MexicoHonduras Minist Hlth, Tegucigalpa, HondurasUniv Maryland, Ctr Agr Biotechnol, College Pk, MD 20742, USATurell, MJ, USA, Med Res Inst Infect Dis, Div Virol, 1425 Porter St, Ft Detrick, MD 21702 USA TI - Vector competence of Mexican and Honduran mosquitoes (Diptera : culicidae) for enzootic (IE) and epizootic (IC) strains of Venezuelan equine encephalomyelitis virus AB - Experimental studies evaluated the vector competence of Ochlerotatus taeniorhynchus (Wiedemann), Culex cancer Theobald, Culex pseudes (Dyar and Knab), Culex taeniopus Dyar and Knab, and a Culex (Culex) species, probably Culex quinquefasciatus Say, and Culex nigripalpus Theobald from Chiapas, Mexico, and Tocoa, Honduras, for epizootic (IC) and enzootic (IE) strains of Venezuelan equine encephalomyelitis (VEE) virus. Culex pseudes was highly susceptible to infection with both the IC and IE strains of VEE (infection rates >78%). Patterns of susceptibility to VEE were similar for Oc. taeniorhynchus collected in Mexico and Honduras. Although Oc. taeniorhynchus was highly susceptible to the epizootic IC strains (infection rates greater than or equal to95%, n = 190), this species was less susceptible to the enzootic IE strain (infection rates less than or equal to35%, n = 233). The Culex (Culex) species were refractory to both subtypes of VEE, and none of 166 contained evidence of a disseminated infection. Virus-exposed Cx. pseudes that refed on susceptible hamsters readily transmitted virus, confirming that this species was an efficient vector of VEE. Although Oc. taeniorhynchus that fed on hamsters infected with the epizootic IC strain transmitted VEE efficiently, only one of six of those with a disseminated infection with the enzootic IE virus that fed on hamsters transmitted virus by bite. These data indicate that Cx. pseudes is an efficient laboratory vector of both epizootic and enzootic strains of VEE and that Oc. taeniorhynchus could be an important vector of epizootic subtypes of VEE MH - Honduras MH - USA MH - Mexico|Chiapas PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000183019100010 L2 - ochlerotatus taeniorhynchus;Culex pseudes;Venezuelan equine encephalomyelitis virus;transmission;Honduras;Mexico;CULEX MELANOCONION TAENIOPUS; VALLEY FEVER VIRUS; ENCEPHALITIS-VIRUS; AMERICA; DISAPPEARANCE; GUATEMALA; PIPIENS SO - Journal of Medical Entomology 2003 ;40(3):306-310 9690 UI - 8401 AU - Turnbull B AU - Martinez H AU - Martinez GO AU - Ryan GW AD - Inst Mexicano Seguro Social, Unidad Invest Epidemiol Nutr, Mexico City 03020, DF, MexicoInst Mexicano Seguro Social, Coordinac Invest Salud, Mexico City 03020, DF, MexicoRAND Corp, Hlth, Santa Monica, CA, USA TI - Whose malnutrition is it anyway? A contrast between mother's assessment of children malnutrition and anthropometry in rural Mexico MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181733103358 SO - Faseb Journal 2003 ;17(4):A713-A714 9691 UI - 8233 AU - Turner AN AU - Ellertson C AU - Thomas S AU - Garcia S AD - Populat Council, Mexico City, DF, MexicoEllertson, C, Ibis Reprod Hlth, 2 Brattle Sq, Cambridge, MA 02138, USA TI - Diagnosis and treatment of presumed STIs at Mexican pharmacies: survey results from a random sample of Mexico City pharmacy attendants AB - Objectives: People in developing countries often seek medical advice for common ailments from pharmacies. As one example, pharmacists routinely diagnose and treat symptomatic sexually transmitted infections (STIs). We aimed to assess the quality of advice provided in Mexico City pharmacies by presenting hypothetical STI related syndromes and recording pharmacy attendants' suggested diagnoses and treatments. Methods: We interviewed the first available attendant in each of a 5% random sample of Mexico City's pharmacies. We inquired about the training, age, and experience of the attendant and about the typical number of clients coming for treatment of suspected STIs. After considering three hypothetical case studies, attendants recommended diagnoses, treatments, and, sometimes, physician follow up. Results: Most Mexico City "pharmacists" are actually clerks, with trained pharmacists rarely available on the premises. The average pharmacy attendant was 32 years old, with a median of 5 years' experience at that pharmacy, but very limited (if any) training. 62% reported seeing 10 or more clients with genital or vaginal infections per month. Depending on the case study, attendants provided appropriate diagnoses in 0-12% of cases, recommended appropriate treatments in 12-16% of cases, and suggested physician follow up for 26-67% of cases. Conclusions: In general, surveyed pharmacy personnel were unable to diagnose accurately or offer appropriate treatment advice when presented with classic, common STI symptoms. Given the volume of clients seeking advice from this source, training pharmacy attendants could significantly help to reduce the burden of disease associated with STIs in Mexico City MH - Mexico|Distrito Federal MH - USA PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 2 U4 - Infectious Diseases U5 - J;Article AV - English IS - 1368-4973 UR - ISI:000183354000012 L2 - REPRODUCTIVE-TRACT INFECTIONS; KNOWLEDGE; DIARRHEA; QUALITY; BANGUI; WOMEN SO - Sexually Transmitted Infections 2003 ;79(3):224-228 9692 UI - 9033 AU - Turner VLG AU - Lynch SM AU - Paterson L AU - Loen-Cortes JL AU - Thorpe JP AD - El Colegio Frontera Sur Carr Panamer & Perifer Su, Dept Ecol & Sistemat Terrestre, San Cristobal de las Casas 29290, Chiapas, MexicoUniv Liverpool, Port Erin Marine Lab, Sch Biol Sci, Port Erin IM9 6JA, Man, EnglandTurner, VLG, Dunstaffnage Marine Res Lab, Oban PA37 1QA, Argyll, Scotland TI - Aggression as a function of genetic relatedness in the sea anemone Actinia equina (Anthozoa : Actiniaria) AB - The beadlet sea anemone Actinia equina (L.) shows a well-documented sequence of aggressive responses towards conspecific individuals. Aggression is also shown towards sea anemones of certain other species. A study was carried out to assess aggressive responses of A. equina to other anemones over a wide range of levels of genetic divergence from genetically identical individuals (clonemates) to various other species, all of which were potentially sympatric. The other species used were the dahlia anemone Urticina felina (L.), the gem anemone Bunodactis verrucosa (Pennant), the snakelocks anemone Anemonia viridis (Forskal), the plumose anemone Metridium senile (L.) and the strawberry anemone Actinia fragacea Tugwell. Intraspecific aggression was also studied in A. fragacea. A. equina exhibited high levels of aggression to all the other species and to unrelated (i.e. non-clonal) individuals of its own species, but was never aggressive to clonemates. The levels of aggression shown by A. equina were found to correlate with the genetic divergence of the other anemone. It was also noted that A. equina only left damaging acrorhagial peels on conspecific individuals, whereas A. fragacea never left a peel on other A. fragacea, but produced peels during all successful 'fights' against A. equina. It is suggested that the non-self recognition system, which triggers the acrorhagial application behaviour in A. equina, is not species-specific, although the occurrence of acrorhagial peeling may be species-specific MH - United Kingdom MH - Mexico|Chiapas PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000181318700008 L2 - self recognition;non-self;clones;spatial competition;interspecific aggression;CORALLIMORPHARIAN RHODACTIS-RHODOSTOMA; INTRASPECIFIC AGGRESSION; ANTHOPLEURA-ELEGANTISSIMA; INTERSPECIFIC AGGRESSION; ASEXUAL REPRODUCTION; NEMATOCYST DISCHARGE; MARGINAL TENTACLES; COLOR MORPHS; ALLORECOGNITION; POPULATIONS SO - Marine Ecology-Progress Series 2003 ;247():85-92 9693 UI - 7532 AU - Uhde-Stone C AU - Zinn KE AU - Ramirez-Yanez M AU - Li AG AU - Vance CP AU - Allan DL AD - Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108, USAUniv Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108, USAUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoARS, USDA, Plant Sci Res Unit, St Paul, MN 55108, USAAllan, DL, Univ Minnesota, Dept Soil Water & Climate, 1991 Upper Buford Circle, St Paul, MN 55108 USA TI - Nylon filter arrays reveal differential gene expression in proteoid roots of white lupin in response to phosphorus deficiency AB - White lupin (Lupinus albus) adapts to phosphorus deficiency (-P) by the development of short, densely clustered lateral roots called proteoid (or cluster) roots. In an effort to better understand the molecular events mediating these adaptive responses, we have isolated and sequenced 2,102 expressed sequence tags (ESTs) from cDNA libraries prepared with RNA isolated at different stages of proteoid root development. Determination of overlapping regions revealed 322 contigs (redundant copy transcripts) and 1,126 singletons (single-copy transcripts) that compile to a total of 1,448 unique genes (unigenes). Nylon filter arrays with these 2,102 ESTs from proteoid roots were performed to evaluate global aspects of gene expression in response to -P stress. ESTs differentially expressed in P-deficient proteoid roots compared with +P and -P normal roots include genes involved in carbon metabolism, secondary metabolism, P scavenging and remobilization, plant hormone metabolism, and signal transduction MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 38 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000185076100024 L2 - PYROPHOSPHATE-DEPENDENT PHOSPHOFRUCTOKINASE; STARVATION-INDUCED RIBONUCLEASE; LYCOPERSICON-ESCULENTUM CELLS; NIGRA SUSPENSION CELLS; ORGANIC-ACID EXUDATION; PHOSPHATE-STARVATION; MEDICAGO-TRUNCATULA; ALBUS L; IRON-DEFICIENCY; FORMATE DEHYDROGENASE SO - Plant Physiology 2003 ;131(3):1064-1079 9694 UI - 7885 AU - Ulloa-Aguirre A AU - Timossi C AU - Barrios-de-Tomasi J AU - Maldonado A AU - Nayudu P AD - IMSS, Res Univ Reprod Med, Mexico City, DF, MexicoIMSS, Hosp Ginecobstetr Luis Castelazo Ayala, Mexico City, DF, MexicoGerman Primate Ctr, Gamete Biol Lab, Gottingen, GermanyGerman Primate Ctr, Dept Reprod Biol, Gottingen, GermanyUlloa-Aguirre, A, IMSS, Unidad Independencia, POB 99-065, Mexico City 10101, DF, Mexico TI - Impact of carbohydrate heterogeneity in function of follicle-stimulating hormone: Studies derived from in vitro and in vivo models AB - Carbohydrates attached to the protein core of glycoprotein hormones influence a number of intracellular and extracellular processes. As with other members of the glycoprotein hormone family, FSH is produced and released as an array of isoforms that differ from each other in the structure of their oligosaccharide attachments. In this review, we discuss how carbohydrate heterogeneity can impact on FSH action in different in vitro and in vivo systems. We present evidence for diverse effects of distinct charge isoforms at the target cell level, including differential and unique effects on various end responses, and discuss how the use of multiple cell-type assays has allowed identification of some specific effects of FSH isoforms on different cell populations and follicle compartments as well as oocyte maturation. Finally, we discuss recent information on the ability of naturally occurring and laboratory manufactured FSH isoforms to evoke particular effects on granulosa cell function and ovarian follicular maturation in vivo. Such studies have provided evidence that the type(s) of FSH signal delivered may in fact regulate distinct biological outcomes irrespective or in addition to outcomes dictated solely by clearance rate differences MH - Germany MH - Mexico|Distrito Federal PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 15 U4 - Reproductive Biology U5 - J;Review AV - English IS - 0006-3363 UR - ISI:000184311100002 L2 - anterior pituitary;follicle-stimulating hormone;follicular development;granulosa cells;pituitary hormones;GONADOTROPIN OLIGOSACCHARIDE HETEROGENEITY; ISOELECTRIC-FOCUSING PATTERN; ACTIVATED PROTEIN-KINASE; METABOLIC-CLEARANCE RATE; OVARIAN GRANULOSA-CELLS; HUMAN FSH ISOFORMS; BIOLOGICAL-ACTIVITY; MOUSE OOCYTES; GROWTH-FACTOR; LUTEINIZING-HORMONE SO - Biology of Reproduction 2003 ;69(2):379-389 9695 UI - 5956 AU - Ulloa A AU - Langevin SA AU - Mendez-Sanchez JD AU - rredondo-Jimenez JI AU - Raetz JL AU - Powers AM AU - Villarreal-Trevino C AU - Gubler DJ AU - Komar N AD - CDC, Div Vector Borne Infect Dis, Ft Collins, CO 80522, USACtr Invest Paludismo, Tapachula, Chiapas, MexicoKomar, N, CDC, Div Vector Borne Infect Dis, POB 2087, Ft Collins, CO 80522 USA TI - Serologic survey of domestic animals for zoonotic arbovirus infections in the Lacandon Forest region of Chiapas, Mexico AB - A serologic survey in domestic animals (birds and mammals) was conducted in four communities located in the Lacandon Forest region of northeastern Chiapas, Mexico, during June 29 to July 1, 2001, with the objective to identify zoonotic arboviruses circulating in this area. We collected 202 serum samples from healthy domestic chickens, geese, ducks, turkeys, horses and cattle. The samples were tested by plaque-reduction neutralization test for antibodies to selected mosquito-borne flaviviruses (family Flaviviridae), including St. Louis encephalitis (SLE), Rocio (ROC), Ilheus (II,H), Bussuquara (BSQ), and West Nile (WN) viruses, and selected alphaviruses (family Togaviridae), including Western equine encephalitis (WEE), Eastern equine encephalomyelitis (EEE), and Venezuelan equine encephalitis (VEE) viruses. Neutralizing antibodies to SLE virus were detected in two (8%) of 26 turkeys, 15 (23%) of 66 cattle, and three (60%) of five horses. Antibodies to VEE virus were detected in 29 (45%) of 65 cattle. Because some of these animals were as young as 2 months old, we demonstrated recent activity of these two viruses. Sub-typing of the VEE antibody responses indicated that the etiologic agents of these infections belonged to the IE variety of VEE, which has been reported from other regions of Chiapas. WN virus-neutralizing antibodies were detected in a single cattle specimen (PRNT90 = 1:80) that also circulated SLE virus-neutralizing antibodies (PRNT90 = 1:20), suggesting that WN virus may have been introduced into the region. We also detected weak neutralizing activity to BSQ virus in four cattle and a chicken specimen, suggesting the presence of this or a closely related virus in Mexico. There was no evidence for transmission of the other viruses (ROC, ILH, EEE, WEE) in the study area MH - USA MH - Mexico|Chiapas PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 13 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 1530-3667 UR - ISI:000220169800001 L2 - arbovirus;Lacandon forest;domestic animals;VIRUS SO - Vector-Borne and Zoonotic Diseases 2003 ;3(1):3-9 9696 UI - 6429 AU - Urcid G AU - Ritter GX AU - Iancu L AD - INAOE, Dept Opt, Tonantzintla 72000, Pue, Mexico. Univ Florida, CISE Dept, Gainesville, FL 32611, USA TI - Kernel computation in morphological bidirectional associative memories AB - Morphological associative memories (MAMs) use a lattice algebra approach to store and recall pattern associations. The lattice matrix operations endow MAMs with properties that are completely different than those of traditional associative memory models. In the present paper, we focus our attention to morphological bidirectional associative memories (MBAMs) capable of storing and recalling non-boolean patterns degraded by random noise. The notions of morphological strong independence (MSI), minimal representations, and kernels are extended to provide the foundation of bidirectional recall when dealing with noisy inputs. For arbitrary pattern associations, we present a practical solution to compute kernels in MBAMs by induced MSI MH - Mexico|Puebla MH - USA T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlegurcid@inaoep.mx ritter@cise.ufl.edu liancu@cise.ufl.edu0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY19C AV - English IS - 0302-9743 UR - ISI:000188097600069 SO - 2003 ;():563-570 9697 UI - 8258 AU - Uresti RM AU - Lopez-Arias N AU - Ramirez JA AU - Vazquez M AD - Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Tamaulipas 88700, MexicoUniv Santiago de Compostela, Dept Quim Anal, Escuela Politecn Super, Area Tecnol Alimentos, Lugo 27002, SpainRamirez, JA, Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Apdo Postal 1015, Tamaulipas 88700, Mexico TI - Effect of amidated low methoxyl pectin on the mechanical properties and colour attributes of fish mince AB - Pectins have been unsuccessfully applied to improve functionality of meat and fish products. Effect of amidated low methoxyl pectin (ALM pectin) levels on functionality of Mexican flounder (Cyclopsetta chittendenii) mince was studied. Changes in the firmness and work of extrusion of pastes, texture profile analysis (TPA) of gels, and colour parameters were determined. ALM pectin at 1% decreased firmness and work of extrusion of fish pastes but increased hardness, chewiness and cohesiveness of the gels (P<0.05). The addition of ALM pectin increased slightly the whiteness and yellowness of mince gels. Chrome parameter indicated that gels remained in the grayish achromatic region. Therefore ALM pectin at 1% could be employed to modify the textural properties of fish mince MH - Mexico|Tamaulipas MH - Spain PB - ZAGREB: FACULTY FOOD TECHNOLOGY BIOTECHNOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 1330-9862 UR - ISI:000183327600005 L2 - amidated low methoxyl pectin;gel;fish;restructured products;GULF-OF-MEXICO; SURIMI; GELATION; PROTEINS SO - Food Technology and Biotechnology 2003 ;41(2):131-136 9698 UI - 9113 AU - Uresti RM AU - Ramirez JA AU - Lopez-Arias N AU - Vazquez M AD - Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Dept Food Sci & Technol, Col Aztlan Reynosa 88740, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainRamirez, JA, Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria Reynosa Aztlan, Dept Food Sci & Technol, Calle 16 & Lago Chapala, Col Aztlan Reynosa 88740, Tamaulipas, Mexico TI - Negative effect of combining microbial transglutaminase with low methoxyl pectins on the mechanical properties and colour attributes of fish gels AB - The objective of this work was to determine the effect of combining different concentrations of microbial transglutaminase (MTGase) and types of low methoxyl (LM) pectin on the mechanical properties (textural profile analysis, puncture test) and the colour attributes of fish restructured products. A disruptive effect was observed when LM pectin and MTGase were added to fish gels. Adding 1% MTGase with LM32 pectin significantly decreased the hardness (3.85 kg), springiness (0.631) and chewiness (0.434 kg). When LM 32 pectin and 0.1% MTGase were added together, significant decreases of the three puncture test parameters were observed. The chroma of fish gels decreased significantly when 0.3% MTGase was added. Fish gels containing the LM35 pectin had higher chroma values than all other fish gels with the same level of MTGase. Hue value was increased in all fish gels after increasing the MTGase level. The results obtained showed that LM pectin is not suitable for use in products containing MTGase. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000181071600015 L2 - surimi;transglutaminase;pectin;fish;NONMUSCLE PROTEINS; GELATION; SURIMI; HYDROCOLLOIDS SO - Food Chemistry 2003 ;80(4):551-556 9699 UI - 9170 AU - Uresti RM AU - Lopez-Arias N AU - Gonzalez-Cabriales JJ AU - Ramirez JA AU - Vazquez M AD - Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria, Tamaulipas 88700, MexicoUniv Santiago de Compostela, Dept Quim Analitica, Escuela Politecn Super, Area Tecnol Alimentos, Lugo 27002, SpainRamirez, JA, Univ Autonoma Tamaulipas, Unidad Acad Multidisciplinaria, Apartado Postal 1015, Tamaulipas 88700, Mexico TI - Use of amidated low methoxyl pectin to produce fish restructured products AB - Recently, amidated low methoxyl (ALM) pectin has been shown to improve functional and textural properties of surimi. The objective of this work was to determine the effect of ALM pectin on fish pastes and functionality of restructured fish products. Whole muscle of sole (Cyclopsetta chittendenii) was used to obtain solubilized pastes with 2.5% salt and 0 (control), 1, 2, 3 or 5% ALM pectin. Changes in firmness, consistency, expressible water contents and colour parameters (L*, a*, b*, chroma and hue) were measured in pastes. Fish gels were obtained by incubating pastes at 40 degreesC for 30 min, followed by 90 degreesC for 15 min. Changes on breaking force, deformation and gel strength of restructured products were measured. ALM pectin decreased significantly (P < 0.05) firmness and consistency of pastes when added at 1%. Increases in both parameters were observed using higher ALM pectin levels. Adding ALM pectin to the paste increased the yellowness and redness (P < 0.05) according with a* and b* values. ALM pectin improved significantly (P < 0.05) breaking force and gel strength, and decreased the content of expressible water when added at 1 or 2%. Higher level of addition decreased significantly all mechanical properties. Results obtained indicated that ALM pectin at 1% could be employed to improve water holding capacity and mechanical properties of restructured fish products. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000181072000005 L2 - amidated low methoxyl pectin;restructured products;Cyclopsetta chittendenii;STIRRED YOGURT; STRAINS; SURIMI SO - Food Hydrocolloids 2003 ;17(2):171-176 9700 UI - 7349 AU - Uribe-Salas A AU - de Lira-Gomez P AU - Perez-Garibay R AU - Nava-Alonso F AU - Magallanes-Hernandez L AU - Lara-Valenzuela C AD - IPN, CINVESTAV, Saltillo 25000, Coahuila, MexicoSIPSA Penoles, Monterey, CA, USAUribe-Salas, A, IPN, CINVESTAV, Unidad Saltillo,Carr Saltillo Monterrey Km 13 AP, Saltillo 25000, Coahuila, Mexico TI - Overloading of gas bubbles in column flotation of coarse particles and effect upon recovery AB - This communication presents experimental results obtained in the column flotation of relatively coarse silica sand (d(80) = 190 mum) conditioned with dodecylamine. It is shown that air bubbles might become completely covered with particles giving rise to bubble-particle aggregate densities close to that of water. Under these circumstances, mineralised bubbles do not have enough buoyancy to rise along the column and tend to accumulate close to the bottom, giving rise to a gas holdup profile that decreases from bottom (50-60%, v/v) to top of the column (around 20%, v/v), and to a decrease in solids recovery (as low as 30% for the more severe conditions: J(t) = 1.5 cm/s and 35% solids slurry). It is postulated that the drop in recovery observed is due to both bubble coalescence caused by overloading (loss of bubble surface area) and to entrainment of mineralised bubbles in the tails stream. The occurrence and magnitude of the phenomenon was photographically documented. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Coahuila MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0301-7516 UR - ISI:000185728400011 L2 - column flotation;bubbles;bubble-particle interaction;ONLINE GAS; HOLDUP SO - International Journal of Mineral Processing 2003 ;71(1-4):167-178 9701 UI - 8477 AU - Uribe A AU - Strauss JF AU - Martinez F AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Penn, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAMartinez, F, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Apdo Postal 70-159, Mexico City 04510, DF, Mexico TI - Contact sites from human placental mitochondria: Characterization and role in progesterone synthesis AB - To understand the functional compartmentalization of human placental mitochondria, we analyzed the composition and steroidogenic activity of contact sites. Several fractions containing contact sites were isolated using osmotic shock treatment and sucrose gradient centrifugation. These fractions contained various proteins and marker enzymes associated with mitochondrial membranes. The fractions containing the cytochrome P450 side chain cleavage system, cholesterol, nicotinamide adenine dinucleotide phosphate-isocitrate dehydrogenase, porin, and adenosine 5'-triphosphate-diphosphohydrolase activity showed the capacity to synthesize progesterone. Our observations indicate that all necessary elements and enzymes for steroidogenesis are present and functional in placental mitochondrial contact sites. This organization may facilitate the metabolism of cholesterol delivered to the outer mitochondrial membrane into steroid hormones by the inner mitochondrial membrane cholesterol side chain cleavage system. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0003-9861 UR - ISI:000182944100004 L2 - human term placental mitochondria;contact sites;progesterone synthesise;marker enzymes;mitochondrial cytochromes;porin;isocitrate dehydrogenase;ACUTE REGULATORY PROTEIN; STEROID-HORMONE SYNTHESIS; HEAT-SHOCK PROTEIN-70; RAT LUTEAL CELLS; PERMEABILITY TRANSITION; INNER-MEMBRANE; PREPROTEIN TRANSLOCASE; CHOLESTEROL TRANSFER; CREATINE-KINASE; MATRIX VOLUME SO - Archives of Biochemistry and Biophysics 2003 ;413(2):172-181 9702 UI - 8793 AU - Uribe AM AU - Cochran JK AU - Shunk DL AD - Arizona State Univ, Dept Ind Engn, Tempe, AZ 85287, USAITESM, Dept Ind & Syst Engn, Mexico City 14380, DF, MexicoCochran, JK, Arizona State Univ, Dept Ind Engn, Tempe, AZ 85287, USA TI - Two-stage simulation optimization for agile manufacturing capacity planning AB - Capacity planning involves the selection of manufacturing technologies and the allocation of budget to specific equipment acquisitions. In today's highly volatile manufacturing world, an agile capacity-planning tool is required. This tool must provide the mechanism for a company to thrive in an environment of uncertainty. Uncertain future demands make capacity planning and technology selection difficult tasks, whether they are caused by variations in forecasts of direct demand or by upstream variability in a supply chain. In this paper, a practical modelling technique for minimizing the required investment in capacity planning for discrete manufacturing sites under an uncertain demand stream is presented. The method consists of a two-stage stochastic integer program. The first stage characterizes the optimal response of the system under uncertainty. The second stage selects a tool set based on the characterization from the first stage, with the addition of budget constraints. The model is scalable, allowing for multiple products, multiple operations, multiple flow paths including re-entrant flow, and multiple tool types. A simple example is introduced to explain the methodology, followed by the results of a large-scale real-world application in the semiconductor industry MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Industrial;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0020-7543 UR - ISI:000182016900006 L2 - FLEXIBILITY; SYSTEMS SO - International Journal of Production Research 2003 ;41(6):1181-1197 9703 UI - 9498 AU - Urtiz-Estrada N AU - Salas-Pacheco JM AU - Yasbin RE AU - Pedraza-Reyes M AD - Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, Guanajuato 36060, Gto, MexicoUniv Texas, Dept Mol & Cell Biol, Richardson, TX 75083, USAPedraza-Reyes, M, Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, POB 187, Guanajuato 36060, Gto, Mexico TI - Forespore-specific expression of Bacillus subtilis yqfS, which encodes type IV apurinic/apyrimidinic endonuclease, a component of the base excision repair pathway AB - The temporal and spatial expression of the yqfS gene of Bacillus subtilis, which encodes a type IV apurinic/ apyrimidinic endonuclease, was studied. A reporter gene fusion to the yqfS opening reading frame revealed that this gene is not transcribed during vegetative growth but is transcribed during the last steps of the sporulation process and is localized to the developing forespore compartment. In agreement with these results, yqfS mRNAs were mainly detected by both Northern blotting and reverse transcription-PCR, during the last steps of sporulation. The expression pattern of the yqfS-lacZ fusion suggested that yqfS may be an additional member of the Esigma(G) regulon. A primer extension product mapped the transcriptional start site of yqfS, 54 to 55 bp upstream of translation start codon of yqfS. Such an extension product was obtained from RNA samples of sporulating cells but not from those of vegetatively growing cells. Inspection of the nucleotide sequence lying upstream of the in vivo-mapped transcriptional yqfS start site revealed the presence of a sequence with good homology to promoters preceding genes of the sigma(G) regulon. Although yqfS expression was temporally regulated, neither oxidative damage (after either treatment with paraquat or hydrogen peroxide) nor mitomycin C treatment induced the transcription of this gene MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000180050900039 L2 - SOLUBLE SPORE PROTEINS; APURINIC-APYRIMIDINIC ENDONUCLEASE; LACZ GENE FUSIONS; G RNA-POLYMERASE; DNA-REPAIR; SPORULATING CELLS; ESCHERICHIA-COLI; GLUCOSE-DEHYDROGENASE; PROMOTER MUTATIONS; HYDROGEN-PEROXIDE SO - Journal of Bacteriology 2003 ;185(1):340-348 9704 UI - 8554 AU - Uscanga MGA AU - Delia ML AU - Strehaiano P AD - CNRS, ENSIACET, Lab Genie Chim, UMR 5503, F-31077 Toulouse 4, FranceInst Tecnol Veracruz, UNIDA, Dept Ing Quim & Bioquim, Veracruz 91860, MexicoDelia, ML, CNRS, ENSIACET, Lab Genie Chim, UMR 5503, 118 Route Narbonne, F-31077 Toulouse 4, France TI - Brettanomyces bruxellensis: effect of oxygen on growth and acetic acid production AB - The influence of the oxygen supply on the growth, acetic acid and ethanol production by Brettanomyces bruxellensis in a glucose medium was investigated with different air flow rates in the range 0-300 1 h(-1) (0-0.5 vvm). This study shows that growth of this yeast is stimulated by moderate aeration. The optimal oxygen supply for cellular synthesis was an oxygen transfer rate (OTR) of 43 mg O-2 1(-1)h(-1). In this case, there was an air flow rate of 60 1 h(-1) (0.1 vvm). Above this value, the maximum biomass concentration decreased. Ethanol and acetic acid production was also dependent on the level of aeration: the higher the oxygen supply, the greater the acetic acid production and the lower the ethanol production. At the highest aeration rates, we observed a strong inhibition of the ethanol yield. Over 180 1 h(-1) (0.3 vvm, OTR =105 mg O-2 1(-1) h(-1)), glucose consumption was inhibited and a high concentration of acetic acid (6.0 g 1(-1)) was produced. The ratio of "ethanol + acetic acid" produced per mole of consumed glucose using carbon balance calculations was analyzed. It was shown that this ratio remained constant in all cases. This makes it possible to establish a stoichiometric equation between oxygen supply and metabolite production MH - France MH - Mexico|Veracruz PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000182702800010 L2 - FERMENTATION; YEAST; ETHANOL SO - Applied Microbiology and Biotechnology 2003 ;61(2):157-162 9705 UI - 8673 AU - Usov I AU - Parikh N AU - Kudriavtsev Y AU - Asomoza R AU - Reitmeier Z AU - Davis R AD - Univ N Carolina, Curriculum Appl & Mat Sci, Chapel Hill, NC 27599, USAIPN, Dept Ingn Elect SEES, CINVESTAV, Mexico City 07300, DF, MexicoN Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695, USAUsov, I, Los Alamos Natl Lab, MST STC, POB 1663, Los Alamos, NM 87545 USA TI - GaN evaporation and enhanced diffusion of Ar during high-temperature ion implantation AB - GaN films were implanted with 150 keV Ar+ at temperatures up to 1100 degreesC to a dose of 3x10(15) cm(-2). Concentration profiles of Ar were measured by secondary ion mass spectroscopy and depth distributions of ion-induced damage were estimated from Rutherford backscattering/channeling spectra. No redistribution of Ar atoms was detected up to 700 degreesC. At 1000 degreesC a deep penetrating diffusion tail and a shift of the Ar peak to the surface were observed. At temperatures higher than 800 degreesC shift of the damage peak to the surface was also observed. We attributed the shift of the Ar peak and the damage peaks to evaporation of thin layer of GaN during high-temperature implantation and estimated its temperature dependence. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000182296700028 L2 - NITRIDES SO - Journal of Applied Physics 2003 ;93(9):5140-5142 9706 UI - 7108 AU - va-Valdivia LM AU - Goguitchaichvili A AU - Urrutia-Fucugauchi J AU - Riisager J AU - Riisager P AU - Lopes OF AD - UNAM, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Mexico City 04510, DF, MexicoUniv Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064, USAUniv Fed Parana, Dept Geol, BR-80060000 Curitiba, Parana, BrazilAlva-Valdivia, LM, UNAM, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Paleomagnetic poles and paleosecular variation of basalts from Parana Magmatic Province, Brazil: geomagnetic and geodynamic implications AB - A paleomagnetic study was carried out along two sections (altogether 35 lava flows, 300 samples) in the central Parana Magmatic Province (PMP), Brazil. The two sections, distanced ca. 200 km apart, yield statistically indistinguishable paleomagnetic poles. The combined paleomagnetic pole with coordinates -85.7degreesN, 197.9degreesE (A95 = 2.6degrees, N = 35) is statistically different from previously published paleomagnetic poles for other sections of PMP. We suggest that this angular difference, as well as differences between previously published poles, is caused by undetected local tectonic rotations not easily identified in the often-poorly exposed lavas of the PMP. A joint analysis of all published PMP paleomagnetic data indicate that paleosecular variation, estimated as the angular standard deviation (SF) of the virtual geomagnetic pole distribution, does not support the suggestion of anomalously high secular variation at low latitudes in the 110-195 Ma period [J. Geophys. Res. 96 (1991) 3923]. All SF estimates are, in fact, in better accordance with latitudinal dependence estimates derived from the curve for the 0-5 Ma period. Moreover, we find that all PMP paleomagnetic poles lie similar to10degrees away from the pole predicted by an assumed fixed hotspot reconstruction of South America. The PMP paleomagnetic poles, therefore, call for either true polar wander or motion of Indo-Atlantic hotspots. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000186171500002 L2 - paleomagnetism;PSV;Parana;Brazil;FLOOD VOLCANISM; SPIN AXIS; AR-40-AR-39 GEOCHRONOLOGY; REMANENT MAGNETIZATION; EARTH; STABILITY; ATLANTIC; RESPECT; AGE; TITANOMAGNETITES SO - Physics of the Earth and Planetary Interiors 2003 ;138(3-4):183-196 9707 UI - 7711 AU - va-Valdivia LM AU - Rivas ML AU - Goguitchaichvili A AU - Urrutia-Fucugauchi J AU - Gonzalez JA AU - Morales J AU - Gomez S AU - Henriquez F AU - Nystrom JO AU - Naslund RH AD - Univ Nacl Autonoma Mexico, Lab Paleomagnetismo & Geofis Nucl, Inst Geofis, Del Coyoacan 04510, DF, MexicoUniv Santiago Chile, Dept Ingn Minas, Santiago, ChileSwedish Museum Nat Hist, Dept Mineral, S-10405 Stockholm, SwedenSUNY Binghamton, Dept Geol Sci, Binghamton, NY 13902, USAAlva-Valdivia, LM, Univ Nacl Autonoma Mexico, Lab Paleomagnetismo & Geofis Nucl, Inst Geofis, Del Coyoacan 04510, DF, Mexico TI - Rock-magnetic and oxide microscopic studies of the El Laco iron ore deposits, Chilean Andes, and implications for magnetic anomaly modeling AB - Microscopic and rock-magnetic studies of the ores and host rocks of the El Laco iron oxide deposits permit us to characterize the magnetic mineralogy and the processes affecting natural remanent magnetization (NRM) during emplacement and evolution of the deposits. Particular attention was devoted to identifying the magnetic mineral composition (magnetite and/or titanomagnetite, and hematite and/or titanohematite, and titanomaghemite) and grain size variations of both ores and host rock. Rock-magnetic data are used to clarify magnetic domain states and remanence acquisition processes, and to assess their significance as a source of magnetic anomalies. Microscopy under reflected light demonstrates that magnetic carriers are mainly magnetite, with significant amounts of ilmenite-hematite minerals. Magmatic titanomagnetites in the andesitic rocks show trellis textures, compatible with high-temperature oxy-exsolution processes. Supergene reactions in ore deposits under eruption conditions are indicated by goethite and hematite oxide minerals. Grain sizes range from a few microns to >100 pm. Hysteresis measurements point to pseudo-single-domain states. Thermal spectra, continuous temperature-dependent susceptibility measurements, and isothermal remanent magnetization (IBM) acquisition suggest predominance of spinels (titanomagnetite or titanomaghemite) with low-Ti contents as magnetic carriers. Although the presence of (titano)hematites is indicated by hysteresis and IBM studies, their contribution to the total remanence seems to be minor. The Fe-oxides in the ore are typically poor in Ti, whereas in the rocks they are Ti-bearing. For the modeling of the magnetic anomalies, we used data on bulk susceptibility and NRM intensity and direction in order to constrain the relative contributions of induced and remanent magnetization components, and to obtain improved control regarding depth and geometry of source bodies. The deep magnetic source corresponds to an ENE-striking tabular body, steeply inclined 65degrees to the north MH - Chile MH - Mexico|Distrito Federal MH - Sweden MH - USA PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 2 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000184726400003 L2 - MEXICO; MICHOACAN; BODIES; FIELD SO - International Geology Review 2003 ;45(6):533-547 9708 UI - 7654 AU - Vakhania N AD - State Univ Morelos, Fac Sci, Cuernavaca 62210, Morelos, MexicoInst Computat Math, Tbilisi 93, Rep of GeorgiaVakhania, N, State Univ Morelos, Fac Sci, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - A better algorithm for sequencing with release and delivery times on identical machines AB - The problem of sequencing n equal-length jobs on m identical machines to minimize the maximal job completion time subject to release and delivery times is considered. An algorithm is proposed which improves the running time of previously known algorithms. The time complexity of the algorithm is O (q(max)mn log n + O (mkappan)), where q(max) is the maximal job delivery time and kappa < n is a parameter which is known only after the termination of the algorithm; in practice, kappa turns Out to be a small positive integer. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Morelos MH - Rep of Georgia PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0196-6774 UR - ISI:000184853000001 L2 - scheduling;identical machines;release time;LENGTH JOBS; DATES; DEADLINES SO - Journal of Algorithms 2003 ;48(2):273-293 9709 UI - 7868 AU - Valderrama GE AU - Stankovic AM AU - Mattavelli P AD - IPICYT, Dept Appl Math & Comp Sci, Mexico City 78210, DF, MexicoNortheastern Univ, Dept Elect & Comp Engn, Boston, MA 02115, USAUniv Udine, DIEGM, I-33100 Udine, ItalyValderrama, GE, IPICYT, Dept Appl Math & Comp Sci, San Luis Potosi SLP, Mexico City 78210, DF, Mexico TI - Dissipativity-based adaptive and robust control of UPS in unbalanced operation AB - In this paper, we investigate the output voltage control for three phase uninterruptible power supply, (UPS) using controllers based on ideas of dissipativity. To provide balanced sinusoidal output voltages even in the presence of nonlinear and unbalanced loads, we first derive a dissipativity-based controller using a conventional alphabeta (fixed frame) representation of system dynamics and a frequency-domain representation of system disturbances. Adaptive refinements have been added to the controller to cope with parametric uncertainties. Second, based on the structure of the first adaptive controller, we propose another. controller that leads to a linear time-invariant (LTI) closed loop system which. is directly, connected to, synchronous frame harmonic voltage control. This controller, denoted as robust, avoids the most computationally demanding parameter. estimation during adaptation,, and offers important advantages for implementation. For the proposed robust, controller, a sufficient condition in terms of the design parameters is,presented to guarantee: stability of the desired equilibrium. and robustness against certain parametric uncertainties. Finally, simulation and experimental results on a three-phase prototype show effectiveness and advantages of the proposed class of controllers MH - Italy MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8993 UR - ISI:000184375300016 L2 - adaptive control;dissipative systems;nonlinear systems;power supplies;uninterruptible power systems;PWM INVERTER; LOADS SO - Ieee Transactions on Power Electronics 2003 ;18(4):1056-1062 9710 UI - 7466 AU - Valdes-Gonzalez R AU - Teran L AU - de Lourdes MS AU - Valenzuela M AU - Ramirez B AU - Garibay N AU - Ormsby C AU - Davila R AU - Bracho E AU - Dorantes L AU - White D AD - Hosp Infantil Mexico Dr Federico Gomez, Lab Xenotrasplantes, Mexico City, DF, MexicoHosp Infantil Mexico Dr Federico Gomez, Dept Endocrinol, Mexico City, DF, MexicoHosp Infantil Mexico Federic, Dept Cirugia, Mexico City, DF, MexicoRobards Res Inst, London, ON, Canada TI - C peptide determinations in porcine neonatal Langerhans islets MH - Canada MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental;Transplantation U5 - J;Meeting Abstract AV - English IS - 0908-665X UR - ISI:000185074800167 SO - Xenotransplantation 2003 ;10(5):518-518 9711 UI - 8410 AU - Valdes-Ramos R AU - Marrufo ME AU - Trejo GM AU - Anderson AS AD - UNAM, Fac Med, Mexico City 06760, DF, MexicoUADY, Fac Med, Yucatan, MexicoUniv Dundee, Sch Med, Publ Hlth Dept, Dundee, Scotland TI - Social class and gender affect concordance with cancer prevention recommendations: Whom are we talking to? MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - United Kingdom PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796901872 SO - Faseb Journal 2003 ;17(5):A1151-A1151 9712 UI - 6579 AU - Valdez B AU - Cheng J AU - Flores F AU - Schorr M AU - Veleva L AD - Univ Autonoma Baja California, Inst Ingn, Red Nacl Corros, Mexicali 21280, Baja California, MexicoMAGNA Chem Canada Inc, Matheson, ON P0K 1N0, CanadaCINVESTAV, IPN, CYTED, Proyecto TROPICORR,Appl Phys Dept, Merida 97310, Yucatan, MexicoValdez, B, Univ Autonoma Baja California, Inst Ingn, Red Nacl Corros, Blvd Benito Juarez,S-N, Mexicali 21280, Baja California, Mexico TI - Application of vapour phase corrosion inhibitors for silver corrosion control in the electronics industry AB - The indoor corrosion of silver components used in the manufacture of electronic devices represents a hard challenge for the electronic industry in Mexico. In this work, a case of silver corrosion occurring in a TV manufacturing plant was documented, analysed and diagnosed. The main pollutant present in the indoor environment of the factory was hydrogen sulphide, which causes rapid silver tarnishing due to the formation of silver sulphide corrosion products. Silver corrosion rates were evaluated by gravimetric assays and surface SEM and EDX analyses were performed to characterize the corrosion film. In order to control the corrosion process VAPPRO vapour phase corrosion inhibitors were used MH - Canada MH - Mexico|Baja California MH - Mexico|Yucatan PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry;Metallurgy & Metallurgical Engineering;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0334-6005 UR - ISI:000187800900007 L2 - silver;electronic devices;hydrogen sulphide;Vappro VCI;TROPICORR SO - Corrosion Reviews 2003 ;21(5-6):445-457 9713 UI - 6726 AU - Valencia-Botin AJ AU - Sandoval-Islas JS AU - Cardenas-Soriano E AU - Michailides TJ AU - Rendon-Sanchez G AD - Colegio Postgrad, Inst Fitosanidad, Montecillo 56230, MexicoUniv Calif Davis, Dept Plant Pathol, Kearney Agr Ctr, Parlier, CA 93648, USAInst Socioecon Estadist & Informat, Montecillo 56230, MexicoValencia-Botin, AJ, Colegio Postgrad, Inst Fitosanidad, Carretera Mexico Texcoco, Montecillo 56230, Mexico TI - Botryosphaeria dothidea causing stem spots on Hylocereus undatus in Mexico MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Agronomy;Plant Sciences U5 - J;Editorial Material AV - English IS - 0032-0862 UR - ISI:000187256900037 SO - Plant Pathology 2003 ;52(6):803-803 9714 UI - 7242 AU - Valencia-Moreno M AU - Ruiz J AU - Ochoa-Landin L AU - Martinez-Serrano R AU - Vargas-Navarro P AD - Univ Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Hermosillo 83240, Sonora, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Sonoro, Dept Geol, Hermosillo 83000, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoValencia-Moreno, M, Univ Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo 83240, Sonora, Mexico TI - Geochemistry of the Coastal Sonora batholith, Northwestern Mexico (vol 40, pg 819, 2003) MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Correction AV - English IS - 0008-4077 UR - ISI:000185983000009 SO - Canadian Journal of Earth Sciences 2003 ;40(10):1437-1437 9715 UI - 7935 AU - Valencia-Moreno M AU - Ruiz J AU - Ochoa-Landin L AU - Martinez-Serrano R AU - Vargas-Navarro P AD - Univ Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Hermosillo 83240, Sonora, MexicoUniv Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Sonora, Dept Geol, Hermosillo 83000, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoValencia-Moreno, M, Univ Nacl Autonoma Mexico, Inst Geol, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo 83240, Sonora, Mexico TI - Geochemistry of the Coastal Sonora batholith, Northwestern Mexico AB - New major- and trace-element and radiogenic Sr and Nd data from granitic rocks help to characterize the geochemical composition of the Coastal Sonora batholith, which represents the westernmost portion of the Laramide Magmatic arc (similar to80-40 Ma) in Mexico. Compared with more inland-located regions of the arc in central and eastern Sonora (Inner Granites), the plutons within the coastal batholith have higher MgO, FeO, and CaO and lower K2O contents, and tend to be more depleted in Nb, U, and to a lesser extent Rb, but relatively enriched in Sr. These rocks display flatter slopes of rare-earth elements, with La abundances around 80 to 200 times chondrite values and smaller but well-developed negative Eu anomalies. Initial Sr-87/Sr-86 ratios and epsilonNd values from a few studied samples of the Coastal Sonora batholith range from 0.70586 to 0.70679 and from -2.3 to -4.7, respectively. These isotopic signatures allow recognition of a more mantle-related magma source for this batholith as compared with the Inner Granites, which have higher Sr and lower Nd ratios. In a more regional context, the compositions of the Coastal Sonora batholith rocks resemble those of the eastern portion of the Peninsular Ranges batholith to the northwest. Based on our observations, we propose that partial melting of a crust thickened by overlapping periods of Jurassic through Cretaceous are magmatism along the southwestern edge of the North American continent may account for the geochemical and isotopic characteristics displayed by the Coastal Sonora batholith granitic rocks MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0008-4077 UR - ISI:000184184900003 L2 - WESTERN UNITED-STATES; GRANITIC-ROCKS; PENINSULAR RANGES; SOUTHERN MARGIN; CALC-ALKALINE; CALIFORNIA; ORIGIN; DISTRIBUTIONS; MAGMATISM; ELEMENTS SO - Canadian Journal of Earth Sciences 2003 ;40(6):819-831 9716 UI - 7329 AU - Valencia F AU - Romero AH AU - Hernandez E AU - Terrones M AU - Terrones H AD - IPICyT, Adv Mat Dept, San Luis Potosi 78210, MexicoCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainValencia, F, IPICyT, Adv Mat Dept, Venustiano Carranza 2425, San Luis Potosi 78210, Mexico TI - Theoretical characterization of several models of nanoporous carbon AB - Elastic, electronic and vibrational properties of seven models of nanoporous carbon are reported. The studied structures are periodic graphitic arrangements with heptagonal and octagonal rings of carbon, known as Schwarzites. The calculations were performed within a non-orthogonal tight binding framework which has been shown to be reliable for diamond, graphene layers, fullerenes and carbon nanotubes. In contrast with previous studies, each structure was properly relaxed, so that differences between each model must be assigned to intrinsic properties rather than to differences in their construction. Thermodynamic properties were calculated from the vibrational density of states MH - Mexico|San Luis Potosi MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1367-2630 UR - ISI:000185631900007 L2 - GRAPHITIC CARBON; MINIMAL-SURFACES; MOLECULAR-SIEVES; CURVED GRAPHITE; GEOMETRY; TRANSFORMATION; TEMPLATE; CRYSTAL SO - New Journal of Physics 2003 ;5(): 9717 UI - 8545 AU - Valencia F AU - Romero AH AU - Kiwi M AU - Ramirez R AU - Toro-Labbe A AD - Pontificia Univ Catolica Chile, Fac Fis, Dept Phys, Santiago 6904411, ChileIPICyT, Adv Mat Dept, San Luis Potosi 78231, SLP, MexicoPontificia Univ Catolica Chile, Fac Quim, Santiago 6904411, ChileKiwi, M, Pontificia Univ Catolica Chile, Fac Fis, Dept Phys, Casilla 306,Correo 22, Santiago 6904411, Chile TI - Density functional theory study of the Si2H6-xFx series of molecules AB - The systematic replacement of hydrogen by fluorine atoms in disilane (Si2H6) is investigated using density functional theory (DFT). For every molecule in the Si2H6-xFx family, with 0 less than or equal to x less than or equal to 6; we find the energetically most favorable configurations. Properties such as chemical potential, chemical hardness, polarizability, electrophilicity and the infrared vibration modes and frequencies are evaluated and analyzed in terms of the fluorine substitution. The molecular. response to twisting the silyl groups at each end of the Si-Si axis, relative to each! other; is also investigated. A consistent picture emerges which is in good agreement with the available experimental results:. (C) 2003 Elsevier Science B.V. All rights reserved MH - Chile MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000182795100035 L2 - MAXIMUM HARDNESS; CHEMICAL-REACTIONS; AB-INITIO; PRINCIPLE; DISILANE SO - Chemical Physics Letters 2003 ;372(5-6):815-824 9718 UI - 8831 AU - Valencia F AU - Romero AH AU - Kiwi M AU - Ramirez R AU - Toro-Labbe A AD - IPICyT, Adv Mat Dept, San Luis Potosi 78231, SLP, MexicoPontificia Univ Catolica Chile, Fac Fis, Santiago 6904411, ChilePontificia Univ Catolica Chile, Fac Quim, Santiago 6904411, ChileKiwi, M, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 6904411, Chile TI - Internal rotation of disilane and related molecules: a density functional study AB - DFT calculations performed on Si2H6, Si2F6, Si2Cl6 and Si2Br6 are reported. The evolution of the energy, the chemical potential and the molecular hardness, as a function of torsion angle, is studied. Results at the DFT-B3LYP/6-311++G** level show that the molecules always favor the stable staggered conformations, with low but significant energy barriers that hinder internal rotation. Internal rotation is always accompanied by weakening and lengthening of the central Si-Si bond. In most cases this lengthening seems to be due to an interplay of electrostatic and hyperconjugative interactions. The chemical potential and hardness Of Si2H6 remains quite constant as the sylil groups rotate around the Si-Si axis, whereas the other systems exhibit different degrees of rearrangement of the electronic density as a function of the torsion angle. A qualitative analysis of the frontier orbitals shows that the effect of torsional motion on electrophilic attack is negligible, whereas this internal rotation may generate different specific mechanisms for nucleophilic attack. (C) 2003 Elsevier Science B.V. All rights reserved MH - Chile MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000181954000006 L2 - MAXIMUM HARDNESS; CHEMICAL-REACTIONS; AB-INITIO; BARRIERS; PRINCIPLE; ELECTRONEGATIVITY; VIEWPOINT; ENERGY SO - Chemical Physics Letters 2003 ;371(3-4):267-275 9719 UI - 8120 AU - Valencia ME AU - eman-Mateo H AU - Salazar G AU - Triana MH AD - CIAD AC, Direcc Nutr, Hermosillo 83000, Sonora, MexicoUniv Chile, Inst Nutr & Tecnol Alimentos, Area Nutr Publ, Lab Metab Energet & Isotopes Estables, Santiago 11, ChileInst Nutr & Higiene Alimentos, Dept Bioquim & Fisiol, Havana, CubaValencia, ME, CIAD AC, Direcc Nutr, Carretera & Victoria Km 0-6,Apartado Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Body composition by hydrometry (deuterium oxide dilution) and bioelectrical impedance in subjects aged > 60 y from rural regions of Cuba, Chile and Mexico AB - BACKGROUND: In Latin American and Caribbean countries such as Chile, Mexico and Cuba, the population over 60 y has increased steadily. In this age group, there is scarce information about body composition, particularly for those living in rural areas. OBJECTIVE: The purpose of this study was to determine body composition in free-living and healthy elderly subjects >60 y from rural areas of Chile, Cuba and Mexico using deuterium oxide dilution and bioelectrical impedance (BIA) and to develop and cross-validate a predictive equation for this group of subjects by BIA for future use as a field technique. SUBJECTS: The study included 133 healthy subjects ( 73 males and 60 females) 460 y from rural regions of Cuba, Chile and Mexico. MEASUREMENTS: Total body water, body weight, height and other anthropometric and BIA variables ( resistance and reactance) were measured. METHODS: Total body water was determined by deuterium oxide dilution, and fat-free mass (FFM)/fat mass were derived from this measurement. The total sample was used in a split-sample internal cross-validation. BIA and other anthropometric variables were integrated to multiple regression model to design the best predictive equation, which was validated in the other sample. ANOVA, multiple regression and Bland and Altman's procedure were used to analyze the data. RESULTS: Body weight, percentage of fat and fat-free mass were lower in the Cuban men and women compared with Chilean and Mexican men and women. The best predictive equation of the FFM was: FFM kg =(-7.71+(H-2/ R x 0.49) + ( country or ethnicity x 1.12) + (body weight x 0.27) + (sex x 3.49) + (Xc x 0.13)), where H-2 is height(2) (cm); R is resistance (Omega); country: Chile - 1, Mexico = 2 and Cuba = 3; sex: women = 0 and men = 1; body weight (kg) and Xc is reactance (Omega). R-2 was 0.944 and the root mean square error (RMSE) was 2.08 kg. The mean +/- s.d. of FFM prediction was 44.2 +/- 9.2 vs 44.6 +/- 10.1. The results of cross-validation showed no significant difference with the line of identity, showing that the predicted equation was accurate. The intercept (= -0.32) was not significantly different from zero (P = 0.89) and the slope (= 1.02) not significantly different from 1.0 (P>0.9). The R-2 was 0.86, RMSE = 3.86 kg of FFM and the pure error was 3.83. CONCLUSION: The new BIA equation is accurate, precise and showed good agreement. The use of this equation could improve the estimates of body composition for the elderly population for these regions, as well as enhancing the opportunity to conduct studies in the elderly population from Latin America MH - Chile MH - Cuba MH - Mexico|Sonora PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 0307-0565 UR - ISI:000183728900013 L2 - body composition;hydrometry;bioelectrical impedance;anthropometry;equations;rural;elderly;Cuba;Chile;Mexico;PIMA-INDIANS; ELDERLY MEN; PHYSICAL-ACTIVITY; FAT; WOMEN; PREDICTION; WATER; ADULTS; MALES; MASS SO - International Journal of Obesity 2003 ;27(7):848-855 9720 UI - 7168 AU - Valle-Levinson A AU - Reyes C AU - Sanay R AD - Old Dominion Univ, Ocean Earth & Atmospher Sci Dept, Ctr Coastal Phys Oceanog, Norfolk, VA 23529, USACtr Invest Cient & Educ Super Ensenada, Estac La Paz Baja Calif Sur, Ensenada, Baja California, MexicoValle-Levinson, A, Old Dominion Univ, Ocean Earth & Atmospher Sci Dept, Ctr Coastal Phys Oceanog, Norfolk, VA 23529 USA TI - Effects of bathymetry, friction, and rotation on estuary-ocean exchange AB - An analytical model that includes pressure gradient, friction, and the earth's rotation in both components of the flow is used to study the transverse structure of estuarine exchange flows and the nature of transverse circulation in estuaries of arbitrary bathymetry. Analytical results are obtained for generic bathymetry and also over real depth distributions and are compared with observations. This study extends previous efforts on the topic of transverse structure of density-induced exchange flows in three main aspects: 1) the analytical model explores any arbitrary bathymetry; 2) the results reflect transverse asymmetries, relative to a midchannel centerline, associated with the effects of the earth's rotation; and 3) the transverse circulation produced by the analytical model is examined in detail. Analytical results over generic bathymetry show, in addition to the already reported dependence of exchange flow structure on the Ekman number, two new features. First, the transverse structure of along-estuary flows shows the earth's rotation effects, even in relatively narrow systems, thus producing transverse asymmetries in these flows. The asymmetries disappear under strongly frictional (high Ekman number) conditions, thus illustrating the previously documented pattern of inflow in channels and outflows over shoals for typical estuaries. Second, transverse flows resemble a "sideways gravitational circulation'' when frictional effects are apparent (Ekman number greater than similar to0.1) responding to a transverse balance between pressure gradient and friction. These transverse flows reverse direction under very weak friction and reflect Coriolis deflection of along-estuary flows, that is, geostrophic dynamics. All examples of observed flows are satisfactorily explained by the dynamics included in the analytical model MH - Mexico|Baja California MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Oceanography U5 - J;Article AV - English IS - 0022-3670 UR - ISI:000186103500013 L2 - COASTAL-PLAIN ESTUARY; CHESAPEAKE BAY; VARIABILITY; ENTRANCE SO - Journal of Physical Oceanography 2003 ;33(11):2375-2393 9721 UI - 9210 AU - Vallejo-Manzur F AU - Perkins Y AU - Varon J AU - Baskett P AD - Baylor Coll Med, Houston, TX 77030, USAAutonomous Univ Tamaulipas, Tampico, Tamaulipas, MexicoFrenchay Hosp, Bristol BS16 1LE, Avon, EnglandVaron, J, Baylor Coll Med, 2219 Dorrington, Houston, TX 77030, USA TI - Andreas Vesalius, the concept of an artificial airway MH - United Kingdom MH - Mexico|Tamaulipas MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 2 U4 - Critical Care Medicine;Emergency Medicine U5 - J;Biographical-Item AV - English IS - 0300-9572 UR - ISI:000180952900001 SO - Resuscitation 2003 ;56(1):3-7 9722 UI - 8249 AU - Valor A AU - Kycia S AU - Torres-Garcia E AU - Reguera E AU - Vazquez-Ramos C AU - Sanchez-Sinencio F AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07360, DF, MexicoUniv La Habana, IMRE, Fac Fis, Havana 10400, CubaLab Nacl Luz Sincrotron, BR-13084971 Campinas, SP, BrazilInst Mexicano Petr, Mexico City 07730, DF, MexicoUNAM, Inst Invest Mat, Mexico City, DF, MexicoValor, A, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Ave Inst Politecn Nacl 2508,AP 14-740, Mexico City 07360, DF, Mexico TI - Structural and thermal study of calcium undecanoate AB - in the present work, an X-ray diffraction (XRD) and thermal study of calcium undecanoate is presented. The measured high-resolution XRD powder pattern of the synthesized salt at room temperature, using synchrotron radiation, showed that the salt is a mixture of monohydrated and anhydrous calcium undecanoate. Calcium undecanoate monohydrate proved to have a monoclinic cell with a symmetry described by the P2(1)/a space group. The structure dehydrates at about 100 degreesC. After dehydration, the salt undergoes a phase transformation which results in a thermotropic mesophase. Further heating of the salt leads to decomposition and melting. Ketones are the probable products of decomposition at 400 degreesC. (C) 2003 Elsevier Science (USA). All rights reserved MH - Brazil MH - Cuba MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000183360200029 L2 - calcium undecanoate;powder diffraction;thermal analysis;infrared spectroscopy;thermal decomposition;synchrotron radiation;CARBOXYLIC-ACIDS; DECOMPOSITION; DIFFRACTION; BEHAVIOR; STEARATE; POWDER; SALTS SO - Journal of Solid State Chemistry 2003 ;172(2):471-479 9723 UI - 9962 AU - Valverde G AU - Macedo JG AU - Cruz D AU - Zink JI AU - Hernandez R AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAMacedo, JG, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Photoconductivity in mesostructured thin films AB - Mesostructured silica films are widely studied due to their different structures, properties and variety of possible applications. Sodium dodecyl sulfate (SDS)-templated sol-gel silica films possess highly ordered lamellar phase structure. It is expected that molecules and polymer chains line up with these layered structures when incorporated into the films. Mesostructured thin films were doped with Dispersed Red 1 (DR1) and carbazole ((C6H4)(2)NH)). The films were poled by corona discharge at 120degreesC. Absorption spectra were recorded as function of the polarization time. Dependence of the absorption coefficient with polarization time was fitted with a Langevin-Debye equation. It shows a saturation level after 60 minutes of polarization. We compare the efficiency of mesostructured thin films with that of amorphous films. The photoconductivity technique was used to determine the charge transport mechanism of these films. From current density versus electrostatic applied field, the parameters for the photovoltaic effect and photoconductivity were determined. Results of the mesostructured thin films are also compared to those of KNbO3 crystals MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0928-0707 UR - ISI:000178789100107 L2 - sol-gel;photoconductivity;mesostructure and thin films;GEL SO - Journal of Sol-Gel Science and Technology 2003 ;26(1-3):605-608 9724 UI - 7609 AU - van Dyk L AU - Miachon S AU - Lorenzen L AU - Torres M AU - Fiaty K AU - Dalmon JA AD - Inst Rech Catalyse, CNRS, F-69626 Villeurbanne, FranceUniv Stellenbosch, ZA-7602 Stellenbosch, South AfricaUniv Autonoma Metropolitana Azcapotzalco, San Pablo, MexicoUCB, CPE Lyon, LAGEP, F-69622 Villeurbanne, FranceDalmon, JA, Inst Rech Catalyse, CNRS, 2 Ave Albert Einstein, F-69626 Villeurbanne, France TI - Comparison of microporous MFI and dense Pd membrane performances in an extractor-type CMR AB - An extractor-type CMR, including a Pt-based fixed-bed catalyst, was combined with two different membranes, either a Pd membrane, obtained by electroless plating, or an MFI zeolite membrane, obtained by hydrothermal synthesis. These two configurations were compared in isobutane dehydrogenation. Both CMRs give better results than conventional reactors. However, though the two membranes presented different separative properties, the two CMRs showed very similar yields. This has been attributed to the limitation of both CMRs by the catalyst lack of efficiency, when compared to the membrane performance. A modeling approach that combines catalyst kinetic law and membrane gas transfer equations also contributes to the description of the CMRs performance. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - South Africa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000185021000019 L2 - Pd membrane;MFI membrane;extractor-type CMR;isobutane dehydrogenation;ISOBUTANE DEHYDROGENATION; ZEOLITE MEMBRANE; REACTOR; SELECTIVITY SO - Catalysis Today 2003 ;82(1-4):167-177 9725 UI - 6540 AU - van Geen A AU - Zheng Y AU - Bernhard JM AU - Cannariato KG AU - Carriquiry J AU - Dean WE AU - Eakins BW AU - Ortiz JD AU - Pike J AD - Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964, USACUNY Queens Coll, Sch Earth & Environm Sci, Flushing, NY 11367, USAUniv S Carolina, Dept Environm Hlth Sci, Columbia, SC 29208, USAUniv So Calif, Dept Earth Sci, Los Angeles, CA 90089, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUS Geol Survey, Fed Ctr, Denver, CO 80225, USAUS Geol Survey, Menlo Pk, CA 94025, USAKent State Univ, Dept Geol, Kent, OH 44242, USAUniv Wales Coll Cardiff, Dept Earth Sci, Cardiff CF10 3YE, S Glam, Walesvan Geen, A, Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA TI - On the preservation of laminated sediments along the western margin of North America AB - Piston, gravity, and multicores as well as hydrographic data were collected along the Pacific margin of Baja California to reconstruct past variations in the intensity of the oxygen-minimum zone (OMZ). Gravity cores collected from within the OMZ north of 24degreesN did not contain laminated surface sediments even though bottom water oxygen (BWO) concentrations were close to 5 mumol/kg. However, many of the cores collected south of 24degreesN did contain millimeter- to centimeter-scale, brown to black laminations in Holocene and older sediments but not in sediments deposited during the Last Glacial Maximum. In addition to the dark laminations, Holocene sediments in Soledad Basin, silled at 290 m, also contain white coccolith laminae that probably represent individual blooms. Two open margin cores from 430 and 700 m depth that were selected for detailed radiocarbon dating show distinct transitions from bioturbated glacial sediment to laminated Holocene sediment occurring at 12.9 and 11.5 ka, respectively. The transition is delayed and more gradual (11.3-10.0 ka) in another dated core from Soledad Basin. The observations indicate that bottom-water oxygen concentrations dropped below a threshold for the preservation of laminations at different times or that a synchronous hydrographic change left an asynchronous sedimentary imprint due to local factors. With the caveat that laminated sections should therefore not be correlated without independent age control, the pattern of older sequences of laminations along the North American western margin reported by this and previous studies suggests that multiple patterns of regional productivity and ventilation prevailed over the past 60 kyr MH - USA MH - Mexico|Baja California MH - United Kingdom PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 19 U4 - Geosciences, Multidisciplinary;Oceanography;Paleontology U5 - J;Article AV - English IS - 0883-8305 UR - ISI:000187859900004 L2 - oxygen-minimum zone;laminations;bioturbation;deglaciation;California margin;SANTA-BARBARA BASIN; OXYGEN-MINIMUM ZONE; GULF-OF-CALIFORNIA; MARINE-SEDIMENTS; LATE PLEISTOCENE; VARVE FORMATION; EL-NINO; PALEOCEANOGRAPHIC SIGNIFICANCE; CLIMATE OSCILLATIONS; LAST DEGLACIATION SO - Paleoceanography 2003 ;18(4): 9726 UI - 7993 AU - Van Gorkom JH AU - Bravo-Alfaro H AU - Dwarakanath KS AU - Guhathakurta P AU - Poggianti BM AU - Schiminovich D AU - Valluri M AU - Verheijen M AU - Wilcots E AU - Zabludoff A AD - Columbia Univ, Dept Astron, New York, NY 10027, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoRaman Res Inst, Bangalore 560080, Karnataka, IndiaUniv Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064, USAOsserv Astron Padova, I-35122 Padua, ItalyCALTECH, Div Phys Math & Astron, Pasadena, CA 91125, USAUniv Chicago, Dept Astron & Astrophys, Chicago, IL 60637, USAUniv Wisconsin, Dept Astron, Madison, WI 53706, USAUniv Arizona, Steward Observ, Tucson, AZ 85721, USAVan Gorkom, JH, Columbia Univ, Dept Astron, 538 W 120th St, New York, NY 10027 USA TI - An HI survey of clusters in the local universe: Outlining the project AB - We outline the project of multifrequency observation of five clusters of galaxies spanning a redshift between 0.05 and 0.2. The core of the project is an HI survey of clusters accomplished with the VLA in its C configuration, and complemented with GMRT data. The 21 cm imaging is being combined with optical spectroscopy and deep NIR imaging with the aim to obtain a database on galaxy evolution in the nearby universe. We choose a sample of clusters with different degrees of dynamical evolution, some containing an important population of starburst or/and post-starburst galaxies, and a hot intracluster medium with emission in X-ray MH - India MH - Italy MH - Mexico|Guanajuato MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000184072000030 L2 - clusters of galaxies : structure;galaxies : evolution;galaxies : spiral;radio lines : galaxies;BRIGHTEST SPIRAL GALAXIES; VIRGO CLUSTER; NEUTRAL HYDROGEN; STAR-FORMATION; COMA CLUSTER; STARBURST; ATLAS SO - Astrophysics and Space Science 2003 ;285(1):219-224 9727 UI - 7577 AU - Vandenabeele P AU - Grimaldi DM AU - Edwards HGM AU - Moens L AD - State Univ Ghent, Analyt Chem Lab, B-9000 Ghent, BelgiumCtr Hist, Seminario 8, Museo Templo Mayor, Mexico City 06060, DF, MexicoUniv Bradford, Bradford BD7 1DP, W Yorkshire, EnglandVandenabeele, P, State Univ Ghent, Analyt Chem Lab, Proeftuinstr 86, B-9000 Ghent, Belgium TI - Raman spectroscopy of different types of Mexican copal resins AB - Dispersive Raman spectra of six copal resins, that were purchased in local markets in Mexico, are presented. The spectra were interpreted and compared with each other. For all these spectra, the relative intensity of the Raman band at approximately 1645 cm(-1), attributed to the exomethylene nu(C=C) stretching vibration, was rather low, especially as fresh samples are involved. In one resin, viz. Incienso, CaCO3 was detected. Probably this inorganic pigment was added as a whitener. In the spectrum of Lagrima a starch fraction was present. Raman spectra of a sample from an Aztec figurine were recorded. It was shown that its composition was inhomogeneous at the micrometer level. Here, too, CaCO3 was observed. It was not possible to identify the resin applied in the antique figurine due to material degradation by age and environmental exposure. (C) 2003 Elsevier B.V. All rights reserved MH - Belgium MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 12 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000185038100006 L2 - Raman spectroscopy;art analysis;resins;copal;NATURAL RESINS; AMBER; ART; GEOSPHERE; FATE SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2003 ;59(10):2221-2229 9728 UI - 8897 AU - Vandenberghe J AU - Thompson FL AU - Gomez-Gil B AU - Swings J AD - State Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumCIAD, AC Mazatlan Unit Aquaculture & Environm Managemen, Mazatlan 82000, Sin, MexicoState Univ Ghent, BCCM LMG Culture Collect, B-9000 Ghent, BelgiumGomez-Gil, B, State Univ Ghent, Microbiol Lab, KL Ledeganckstr 35, B-9000 Ghent, Belgium TI - Phenotypic diversity amongst Vibrio isolates from marine aquaculture systems AB - A total number of 1473 Vibrio isolates were collected from different aquaculture systems in many countries. Isolates were obtained from bivalves (mussels, scallops, oysters), shrimp and fish, sea urchins, live feed (algae, Artemia, rotifers), seaweed, aquaculture market products and from the aquaculture environment (tank water, seawater, sediments). Eggs, healthy and diseased or dead larvae, and adult organisms were sampled from cold-water species and moderate- to warm-water species. All isolates were phenotypically characterized using the Biolog GN technique. Eighty-nine different clusters were obtained, of these clusters, only 33 were identified comprehending 992 isolates. The remaining 56 groups did not cluster with any of the included type strains and remained unidentified. Seventy-eight isolates did not cluster with any other strain. It was shown that the Vibrio genus is a phenotypically diverse group making the identification with the Biolog system difficult and unreliable. (C) 2003 Elsevier Science B.V All rights reserved MH - Belgium MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000181802700002 L2 - vibrio taxonomy;phenotypic diversity;biolog;FRAGMENT-LENGTH-POLYMORPHISM; IDENTIFICATION; LARVAE; ANGUILLARUM; HATCHERIES; CRUSTACEA; SEQUENCES; BACTERIA; TAXONOMY; CULTURE SO - Aquaculture 2003 ;219(1-4):9-20 9729 UI - 7008 AU - varez-Mendez A AU - Torres-Gonzalez LC AU - Alvarez N AU - Torres-Martinez LM AD - UANL, Fac Ciencias Quim, Lab Invest Vidrio, San Nicolas De Los Garza 664003, NL, MexicoUniv La Habana, Havana, CubaTorres-Gonzalez, LC, UANL, Fac Ciencias Quim, Lab Invest Vidrio, San Nicolas De Los Garza 664003, NL, Mexico TI - Kinetic thermal analysis of glass ceramics from industrial wastes AB - To recycle inorganic industrial solid wastes, the use of glass ceramics has been proposed as a useful choice. In this work, a pyroxene glass ceramic of the CaO-MgO-Al2O3-SiO2 family was synthesized by mixing three industrial wastes of high production rate generated in northeast Mexico. A kinetic study was carried out by a non-isothermal differential thermal analysis technique (DTA) from which the kinetic parameters, activation energy for crystallization, Ea, of 534 +/- 4 kJ mol(-1), frequency factor, v, of 5.60 x 10(20) min(-1) and Avrami factor, n, values between 1.2 +/- 0.2 and 1.3 +/- 0.1 were estimated, corresponding to a surface crystallization mechanism. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000186435700016 L2 - CRYSTALLIZATION KINETICS; NUCLEATION SO - Journal of Non-Crystalline Solids 2003 ;329(1-3):73-76 9730 UI - 6622 AU - varez-Nemegyei J AU - Canoso AJ AD - Inst Mexicano Seguro Social, Ctr Med Nacl Ignacio Garcia Tellez, Hosp Especialidades, Serv Reumatol, Merida, Yucatan, MexicoABC Med Ctr, Mexico City, DF, MexicoTufts Univ, Sch Med, Boston, MA 02111, USAAlvarez-Nemegyei, J, Calle 57 Num 503,Ctr, Merida 97000, Yucatan, Mexico TI - Evidence-based soft tissue rheumatology. Part I - Subacromial impingement syndrome AB - Impingement into the coracoacromiohumeral space, a common cause of rotator cuff tendinopathy, may result from an impinging osteoligamentons upper boundary, abnormalities in the tendon itself, or failure of muscles that retain the humeral head on the glenoid. An over-use mechanism is clearly a risk factor in throwing athletes, whereas occupational overuse may contribute to its development in nonathletes. The subacromial anesthetic injection test remains as the acknowledged gold standard for diagnosis. There is evidence on the therapeutic efficacy of nonsteroidal antinflammatory drugs, glucocorticoid subacromial injection, and acupuncture as compared with placebo. Also, acromioplasty appears to be better than physiotherapy. Patients with rotator cuff tendinopathy may be successfully treated with nonsteroidal antiinflammatory drugs, a glucocorticoid subacromial injection, or acupuncture. In failures of conservative therapy, surgery should be considered. Further research is required on etiology, diagnosis, natural course, and validity of many treatments currently used in this common condition MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Review AV - English IS - 1076-1608 UR - ISI:000187660600011 L2 - subacromial impingement syndrome;rotator cuff tendinopathy;shoulder pain;ROTATOR CUFF TEAR; SHOULDER DISORDERS; BURSAL EFFUSION; PAIN; CORTICOSTEROIDS; ULTRASONOGRAPHY; CLASSIFICATION; TENDINITIS; MANAGEMENT; DIAGNOSIS SO - Jcr-Journal of Clinical Rheumatology 2003 ;9(3):193-199 9731 UI - 8824 AU - varez-Nodarse R AU - Atakishiyeva MK AU - Atakishiyev NM AD - Univ Sevilla, Dept Anal Matemat, E-41080 Seville, SpainUniv Granada, Inst Carlos I Fis Teor & Comp, E-18071 Granada, SpainUAEM, Fac Ciencias, Cuernavaca 62250, Morelos, MexicoUNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoAlvarez-Nodarse, R, Univ Sevilla, Dept Anal Matemat, Apdo 1160, E-41080 Seville, Spain TI - Mellin transforms for some families of q-polynomials AB - By using Ramanujan's q-extension of the Euler integral representation for the gamma function, we derive the Mellin integral transforms for the families of the discrete q-Hermite 11, the Al-Salam-Carlitz 11, the big q-Laguerre, the big q-Legendre, the big q-Jacobi and the q-Hahn polynomials. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0377-0427 UR - ISI:000181888700003 L2 - Mellin integral transforms;q-polynomials;GAMMA SO - Journal of Computational and Applied Mathematics 2003 ;153(1-2):9-18 9732 UI - 8561 AU - varez-Parrilla E AU - Cabrer PR AU - De La Rosaa LA AU - Al-Soufi W AU - Meijide F AU - Tato JV AD - Univ Autonom Ciudad Juarez, Inst Ciencias Biomed, Dept Ciencias Bas Anillo Envolvente Pronaf & Esto, Mexico City 32300, DF, MexicoUniv Santiago de Compostela, Dept Quim Fis, Fac Ciencias, Lugo 27002, SpainAlvarez-Parrilla, E, Univ Autonom Ciudad Juarez, Inst Ciencias Biomed, Dept Ciencias Bas Anillo Envolvente Pronaf & Esto, S-N Zona Pronaf,Cd Juarez, Mexico City 32300, DF, Mexico TI - "Three-in-one" complexes formed by anionic guests and monosubstituted cationic alkyldiamino beta-cyclodextrin derivatives AB - The effect of electrostatic interactions on the complexation of ionic guests by charged beta-cyclodextrin (betaCD) derivatives is reviewed. Special attention is paid to the numerous studies concerning the effect of electrostatic interactions on (i) the complexation of fluorescent and UV probes; (ii) the catalytic and chiral recognition properties of betaCD derivatives; and (iii) the complexation of two bile salts (sodium cholate, NaC, and sodium deoxycholate, NaDC). The formation of three-in-one complexes between NaC and alkyldiamino betaCD derivatives is also presented MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1061-0278 UR - ISI:000182535900007 L2 - beta-cyclodextrin;amino beta-cyclodextrin derivatives;electrostatic interactions;ionic guests;inclusion complexes;AQUEOUS-SOLUTION; MOLECULAR RECOGNITION; SODIUM DEOXYCHOLATE; CHIRAL RECOGNITION; CONJUGATE BASES; BINDING; ACIDS; 6(A)-(3-AMINOPROPYLAMINO)-6(A)-DEOXY-BETA-CYCLODEXTRIN; 2-NAPHTHALENESULFONATE; METALLOCYCLODEXTRINS SO - Supramolecular Chemistry 2003 ;15(3):207-211 9733 UI - 1155 AU - varez-Salas LM AU - itez-Hess ML AU - DiPaolo JA AD - NCI, Ctr Canc Res, NIH, Bethesda, MD 20892, USACINVESTAV, Dept Genet & Mol Biol, Lab Gene Therapy, Mexico City, DF, MexicoDiPaolo, JA, NCI, Ctr Canc Res, NIH, Bethesda, MD 20892, USA TI - Advances in the development of ribozymes and antisense oligodeoxynucleotides as antiviral for agents for human papillomaviruses AB - Urogenital human papillomavirus (HPV) infections are the most common viral sexually transmitted disease in women. On a worldwide basis cervical cancer is the second most prevalent cancer of women. Although HPV infection is not sufficient to induce cancer, the causal relation between high-risk HPV infection and cervical cancer is well established. Over 99% of cervical cancers are positive for high-risk HPV. Therefore, there is a need for newer approaches to treat HPV infection. Two novel approaches for inactivating gene expression involve ribozymes and oligonucleotides. Methods for identification of target genes involved in neoplastic transformation and tumour growth have been established, and these will lead to therapeutic approaches without any damage to normal cellular RNA molecules, which is often associated with conventional therapeutics. Ribozymes and oligonucleotides represent rational antiviral approaches for inhibiting the growth of cervical lesions and carcinomas by interfering with E6/E7 RNA production. The E6 and E7 genes of high-risk HPVs cooperate to immortalize primary epithelial cells and because they are found in cervical cancer are considered the hallmark of cervical cancer. The use and modification of ribozymes and antisense oligodeoxynucleotides can inhibit the growth of HPV-16 and HPV-18 immortalized cells, and tumour cells by eliminating E6/E7 transcript. Hammerhead and hairpin ribozymes have been widely studied because of their potential use for gene therapy and their place as therapeutic tools for cervical cancer is being evaluated. Although antiviral ribozymes and antisense molecules have been effective as in vitro or in vivo inhibitors of high-risk HPV-positive cells, none is currently in clinical trial. There are, however, a number of other antisense therapies in Phase I-III clinical trial for several oncogenes MH - Mexico|Distrito Federal MH - USA PB - LONDON: INT MEDICAL PRESS LTD RP - NOT IN FILE U3 - TC 14 U4 - Infectious Diseases;Pharmacology & Pharmacy;Virology U5 - J;Review AV - English IS - 1359-6535 UR - ISI:000231266500002 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; IN-VITRO SELECTION; C-RAF KINASE; HAIRPIN RIBOZYME; HAMMERHEAD RIBOZYME; SELF-CLEAVAGE; TYPE-16 E6; SECONDARY STRUCTURE; CERVICAL-CANCER; OLIGONUCLEOTIDE COMPLEMENTARY SO - Antiviral Therapy 2003 ;8(4):265-278 9734 UI - 7825 AU - varez-Toledano C AU - Delgado E AU - Donnadieu B AU - Hernandez E AU - Martin G AU - Zamora F AD - Univ Autonoma Madrid, Fac Ciencias, Dept Quim Inorgan, E-28049 Madrid, SpainUNAM, Inst Quim, Mexico City 04510, DF, MexicoCNRS, Serv Cristallochim, Lab Chim Coordinat, F-31077 Toulouse, FranceDelgado, E, Univ Autonoma Madrid, Fac Ciencias, Dept Quim Inorgan, E-28049 Madrid, Spain TI - Reactivity of Fe-3(CO)(12) towards thiols containing an alpha,beta-unsaturated ketone system AB - The unsaturated derivatives [Fe-2(CO)(6)(mu-S2C=CHC(O)C6H4X)] (X = F, OMe) have been isolated by reaction of [(HS)(2)C = CHC(O)C6H4X] (X = F, OMe) with Fe-3(CO)(12) in dried THF. Addition of Fe-2(CO)(9) to a solution of [Fe-2(CO)(6)(mu-S2C = CHC(O)C6H4OMe)] affords [Fe(CO)(4){mu-(OMe)C6H4C(O)CH = C(S)(2)Fe-2(CO)(6)}]. The new compounds have been characterised by analytical and spectroscopic data and the crystal structure of [Fe-2(CO)(6)(mu-S2C = CHC(O)C6H4F)] has been solved by X-ray diffraction. (C) 2003 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000184441200017 L2 - iron carbonyl;thiolate;alpha,beta-unsaturated ketone;IRON CARBONYL-COMPLEXES; X-RAY STRUCTURES; LIGANDS; ANALOGS; IMINES; BONDS SO - Inorganica Chimica Acta 2003 ;351():119-122 9735 UI - 8875 AU - varez-Toledano C AU - Delgado E AU - Donnadieu B AU - Gomez MA AU - Hernandez E AU - Martin G AU - Ortega-Jimenez B AU - Zamora F AD - Univ Autonoma Madrid, Fac Ciencias, Dept Quim Inorgan, E-28049 Madrid, SpainNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoCoordinat CNRS, Chim Lab, Serv Cristallochim, F-31077 Toulouse, FranceDelgado, E, Univ Autonoma Madrid, Fac Ciencias, Dept Quim Inorgan, E-28049 Madrid, Spain TI - Activation of C-S bonds in organosulfur compounds containing alpha,beta-unsaturated ketone systems by carbonylruthenium and -iron complexes AB - Vinylidenetetraruthenium clusters have been obtained from the reactions between [Ru-3(CO)(12)] and [CH3C(O)CH=C(SCH3)(2)] or [(C5H5)Fe{C5H4CH=CHC(O)CH=C(SCH2CH2S)}] by cleavage of the S-C sp(2) bonds in these ligands. An excess of [CH3C(O)CH=C(SCH3)(2)] afforded the dinuclear complex [Ru-2(CO)(4)(mu-SCH3)(2){eta(2):kappa-C,O-C(SCH3)CHC(O)CH3}(2)], which was then converted into the vinylidene cluster [Ru-4(CO)(10)(mu-SCH3)(2){mu(4),eta(3):kappa-C,C,O-C=CHC(O)CH3}] in the presence of more of the carbonylruthenium complex. However, the carbonyliron complex led to the formation of the dinuclear compounds [Fe-2(CO)(4) (mu-SCH3)(2){eta(2):kappa-C,O-C(SCH3)CHC(O)CH3}(2)] and [Fe-2(CO)(5){mu,eta(4):kappa-C,O,S,S- (SCH2CH2S)C=CHC(O)CH=CHC5H4}Fe(C5H5)]. All of the new complexes exhibit a pentametallacycle group as a consequence of the rupture of the S-C bonds, as well as the presence of the C(O)R substituent in these ligands. The compounds have been characterised by analytical and spectroscopic data and the crystal structures of some of them have been solved by X-ray diffraction MH - France MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000181789800024 L2 - vinylidene ligands;clusters;iron;carbonyl ligands;ruthenium;RAY CRYSTAL-STRUCTURES; X-RAY; RUTHENIUM CLUSTERS; CARBONYL CLUSTERS; METAL-COMPLEXES; LIGANDS; REACTIVITY; VINYLIDENE; MU-4-VINYLIDENE; CYCLOBUTYNE SO - European Journal of Inorganic Chemistry 2003 ;(3):562-568 9736 UI - 8731 AU - Vargas-Alarcon G AU - Hernandez-Pacheco G AU - Zuniga J AU - Rodriguez-Perez JM AU - Perez-Hernandez N AU - Rangel C AU - Villarreal-Garza C AU - Martinez-Laso J AU - Granados J AU - rnaiz-Villena A AD - Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Tlalpan 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Phys, Mexico City, DF, MexicoInst Nacl Enfermedades Resp, Mol Biol & Immunogenet Lab, Infect Dis Unit, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoUniv Complutense, Dept Immunol, Hosp Octubre 12, Madrid, SpainVargas-Alarcon, G, Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Juan Badiano 1, Tlalpan 14080, DF, Mexico TI - Distribution of HLA-B alleles in Mexican Amerindian populations AB - In the present study we analyzed by PCR-SSO technique the HLA-B gene frequencies in 281 healthy individuals from four Mexican Amerindian populations (66 Mayos, 90 Mazatecans, 72 Nahuas and 53 Teenek). The most frequent alleles in all studied populations were HLA-B35, HLA-B39, and HLA-B40; however, some differences were observed between populations. The HLA-B35 allele was the most frequent in three of the four populations studied (Mayos, Nahuas and Teenek), whereas in Mazatecans the most frequent allele was HLA-B39. HLA-B40 presented frequencies higher than 10% in all groups. On the other hand, only Mayos presented an HLA-B51 gene frequency higher than 10%. When comparisons were made,, important differences between groups were observed. The Teenek group presented an increased frequency of HLA-B35 when compared to Mazatecans and the HLA-B52 allele was increased in Nahuas and Teenek when compared to Mayos. An increased frequency of HLA-B39 was observed in Mazatecans when compared to Nahuas, Mayos and Teenek. Also, an increased frequency of HLA-B51 was observed in Mayos when compared to Mazatecans and Nahuas. These data corroborate the restricted polymorphism of HLA-B alleles and the high frequency of HLA-B35, HLA-B39 and HLA-B40 alleles in autochthonous American populations. In spite of the restriction in this polymorphism, differences in frequencies of HLA-B alleles could be helpful in distinguishing each of these populations MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Genetics & Heredity;Immunology U5 - J;Article AV - English IS - 0093-7711 UR - ISI:000182143900002 L2 - alleles;Amerindian population;human leukocyte antigen;major histocompatibility complex;polymorphism;NAHUA AZTEC DESCENT; CLASS-I; EVOLUTION; FREQUENCIES; AMERICA; POLYMORPHISM; SEQUENCES; INTRON-2; DISEASE; SAMPLE SO - Immunogenetics 2003 ;54(11):756-760 9737 UI - 5972 AU - Vargas-Gonzalez R AU - Sotelo-Avila C AU - Coria AS AD - Cardinal Glennon Childrens Hosp, St Louis, MO 63104, USAHosp Para Nino Poblano, Dept Pathol, Puebla, MexicoHosp Infantil Mexico Dr Federico Gomez, Dept Pediat, Mexico City, DF, MexicoSotelo-Avila, C, Cardinal Glennon Childrens Hosp, 1465 S Grand Blvd, St Louis, MO 63104 USA TI - Renal medullary carcinoma in a six-year-old boy with sickle cell trait AB - Renal medullary carcinoma (RMC), an aggressive malignant epithelial neoplasm, first emerged as a distinct clinicopathologic entity in 1995. It affects individuals 40 years of age or younger and is. strongly associated with sickle cell disease or trait. The majority of patients with RMC have widely disseminated disease at the time of diagnosis and most fail to respond to both chemotherapy and radiotherapy. Mortality approaches 100%, and death usually occurs within a few months to a year of diagnosis. We report a 6-year-old African-American boy with a history of gross hematuria who died four weeks after diagnosis of disseminated metastatic disease. Autopsy showed a 4.4-cm renal mass with metastases to the contra lateral kidney, liver, lungs and multiregional lymph nodes. RMC should be included in the differential diagnosis of any patient 40 years old or younger with a history of hemoglobinopathy and gross hematuria and/or abdominal or flank pain. A brief discussion of the differential diagnosis, histogenesis and treatment is presented in this study MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - BUDAPEST: ARANYI LAJOS FOUNDATION RP - NOT IN FILE U3 - TC 3 U4 - Oncology;Pathology U5 - J;Article AV - English IS - 1219-4956 UR - ISI:000220237500008 L2 - sickle cell disease;renal medullary carcinoma;collecting duct carcinoma;DISEASE; ABNORMALITIES; NEPHROPATHY SO - Pathology & Oncology Research 2003 ;9(3):193-195 9738 UI - 7677 AU - Vargas-Hernandez JJ AU - Adams WT AU - Joyce DG AD - Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331, USAVargas-Hernandez, JJ, Collegio Postgrad, Inst Recursos Nat, Mexico City 56230, DF, Mexico TI - Quantitative genetic structure of stem form and branching traits in Douglas-fir seedlings and implications for early selection AB - Open-pollinated (OP) and full-sib (FS) families of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) were grown in two replicated nursery regimes in order to evaluate the magnitude and repeatability of genetic parameter estimates for stem form (stem sinuosity, forking) and branching (number, length and angle of branches) traits in 2-year-old seedlings, and the relationships of these traits with stem growth. With data from older trees of the OP families growing in the field (ages 12 and 24), genetic control of similar traits was compared at the different ages, and nursery-field correlations (r(xy)) were estimated. With the exception of forking, estimates of family heritability (h(f)(2)) were moderate to strong for stem form and branching traits in seedlings (0.32 less than or equal to h(f)(2) less than or equal to 0.94; mean = 0.73), and similar to growth traits (0.45 less than or equal to h(f)(2) less than or equal to 0.90; mean = 0.75). Family performance and estimates of genetic parameters were relatively stable across nursery regimes and family type. Genetic relationships among traits in seedlings were similar to those observed in older field-grown trees, indicating that these traits are controlled by similar sets of genes in the two age classes. Nursery-field correlations between comparable traits were consistent across nursery regimes, but r(xy) was strong enough to be useful for early testing purposes (i.e., \r(xy)\ greater than or equal to 0.30), only for number of whorls with steep-angled (WSAB), branch length, and branch angle in older branches trees. Predicted gains from early selection for these or correlated traits were at least 40-50% of those expected from selection at older ages. Because of unfavorable genetic correlations, selection for stem growth potential alone at the seedling stage is expected to produce unfavorable impacts on WSAB and stem sinuosity in older trees. To avoid such negative effects on wood quality, both stem form and branching traits should be included as selection criteria in Douglas-fir breeding programs MH - Mexico|Distrito Federal MH - USA PB - FRANKFURT: J D SAUERLANDERS VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Forestry;Genetics & Heredity U5 - J;Article AV - English IS - 0037-5349 UR - ISI:000184687400007 L2 - Pseudotsuga menziesii;stem sinuosity;forking;repeatability;wood quality;nursery-field correlations;SEED WEIGHT; CROWN FORM; GROWTH; SIZE; COMPONENTS; SPRUCE; VALUES; PINE SO - Silvae Genetica 2003 ;52(1):36-44 9739 UI - 8127 AU - Vargas-Villamil FD AU - Rivera DE AU - Kempf KG AD - Inst Mexicano Petr, Programe Math Aplicadas & Comp, Mexico City 07730, DF, MexicoArizona State Univ, Inst Mfg Enterprise Syst, Control Syst Engn Lab, Tempe, AZ 85287, USAArizona State Univ, Dept Chem & Mat Engn, Tempe, AZ 85287, USAIntel Corp, Decis Technol, Technol & Mfg Grp, Chandler, AZ 85226, USAVargas-Villamil, FD, Inst Mexicano Petr, Programe Math Aplicadas & Comp, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - A hierarchical approach to production control of reentrant semiconductor manufacturing lines AB - A three-layer hierarchical approach for inventory control and production optimization of semiconductor reentrant manufacturing, lines is developed. At the top layer, the parameters of an aggregated model are obtained on-line while, at the intermediate layer, production optimization and inventory control via model predictive control are performed. The aim of these two layers is aggregated (or averaged) supervisory control. The bottom layer consists of a distributed control policy,which issues discrete-event decisions to track the aggregated targets, issued by the optimizer. This layer accomplishes shop-floor control. The algorithm is applied to a discrete-event manufacturing line problem developed by Intel Corporation, which captures the main challenges posed by reentrant manufacturing lines MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000183821700015 L2 - discrete-event system;hierarchical structure;model predictive control (MPC);reentrant manufacturing line;scheduling;semiconductor fabrication;WAFER FABRICATION; SCHEDULING MODELS; SYSTEMS; OPTIMIZATION; PERFORMANCE; INVENTORY; INDUSTRY SO - Ieee Transactions on Control Systems Technology 2003 ;11(4):578-587 9740 UI - 9419 AU - Vargas CE AU - Hirsch JG AU - Draayer JP AD - Grand Accelerateur Natl Ions Lourds, F-14076 Caen 5, FranceNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAVargas, CE, Grand Accelerateur Natl Ions Lourds, BP 5027, F-14076 Caen 5, France TI - Microscopic description of the scissors mode in odd-mass heavy deformed nuclei AB - Pseudo-SU(3) shell-model results are reported for M1 excitation strengths in Gd-157, Dy-163 and Tm-169 in the energy range between 2 and 4 MeV. Non-zero pseudo-spin couplings between the configurations play a very important role in determining the M1 strength distribution, especially its rapidly changing fragmentation pattern which differs significantly from what has been found in neighboring even-even systems. The results suggest one should examine contributions from intruder levels. (C) 2002 Elsevier Science B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000180278700013 L2 - pseudo-SU(3) shell model;Gd-157;Dy-163;Tm-169;scissors mode;odd-mass nuclei;NORMAL PARITY BANDS; COLLECTIVE 1+ STATES; SHELL-MODEL; SCATTERING; STRENGTH; GD-156; EXCITATIONS; PSEUDOSPIN; SYMMETRY; ENERGY SO - Physics Letters B 2003 ;551(1-2):98-102 9741 UI - 7134 AU - Vargas MA AU - St-Louis M AU - Desgroseillers L AU - Charli JL AU - Boileau G AD - Univ Montreal, Fac Med, Dept Biochim, Montreal, PQ H3C 3J7, CanadaUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet Desarrollo & Fisiol Mol, Cuernavaca 62271, Morelos, MexicoBoileau, G, Univ Montreal, Fac Med, Dept Biochim, CP 6128,Succ Centreville, Montreal, PQ H3C 3J7, Canada TI - Parathyroid hormone-related protein(1-34) regulates Phex expression in osteoblasts through the protein kinase A pathway AB - Phex (a phosphate-regulating gene with homologies to endopeptidases on the X chromosome) is expressed predominantly in bone in which it has been implicated in the mineralization process. Multiple factors and hormones, including PTHrP, regulate formation, development, and/or homeostasis of bone. The purpose of the present study was to determine whether PTHrP( 1 - 34) regulates Phex expression and identify the signaling pathway used. Phex mRNA and protein levels were analyzed by RT-PCR and immunoblotting, respectively. In UMR-106 cells, PTHrP(1-34) caused a time- and concentration-dependent decrease in Phex expression. Forskolin, an adenylate cyclase activator, had the same effect. Dibutiryl cAMP also decreased Phex expression, and its effect was blocked by H89, a protein kinase A (PKA) inhibitor. In contrast, 12-O-tetradecanoyl phorbol-13-acetate, a protein kinase C (PKC) activator, increased Phex expression in a time- and dose-dependent manner. This effect was reversed by bisindolylmaleimide I, a PKC inhibitor. Bovine PTH(3-34), which activates PKC but not PKA, had no effect. On the contrary, human PTH(1 - 31), which activates PKA but not PKC, decreased Phex expression. H89 but not bisindolylmaleimide I blocked the effect of PTHrP( 1 - 34). PTHrP( 1 - 34) also decreased Phex expression in cultures of fetal rat calvaria cells at d 7 of culture but not at later stages. These data demonstrate that PTHrP(1 - 34), through PKA, down-regulates Phex expression in osteoblasts MH - Canada MH - Mexico|Morelos PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 3 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0013-7227 UR - ISI:000186178300030 L2 - X-LINKED HYPOPHOSPHATEMIA; TUMOR-INDUCED OSTEOMALACIA; RENAL PHOSPHATE-TRANSPORT; MESSENGER-RNA EXPRESSION; DEFECTIVE BONE-FORMATION; HYP MOUSE PHENOTYPE; C ACTIVATION DOMAIN; OSTEOSARCOMA CELLS; PEX GENE; SUBCELLULAR-LOCALIZATION SO - Endocrinology 2003 ;144(11):4876-4885 9742 UI - 6793 AU - Varon J AU - Fromm RE AU - Chanin K AU - Filbin M AU - Vutpakdi K AD - Baylor Coll Med, Houston, TX 77030, USAUniv Texas, Hlth Sci Ctr, Pulm & Crit Care Sect, Houston, TX, USAEscola Med Ignacio A Santos, Inst Tecnol & Estudios Super Monterrey, Monterrey, MexicoVaron, J, 2219 Dorrington, Houston, TX 77030, USA TI - Critical illness at mass gatherings is uncommon AB - Gatherings of large numbers of people at concerts, sporting events, and other occasions lead to an assembled population with a potential for a wide variety of illnesses and injuries. The collection of large numbers of people in a single location has led some authors to recommend the placement of resuscitation equipment or other medical services in close proximity to these activities. These recommendations not withstanding, data on the frequency of critical illness at mass gatherings (a group exceeding 1000 persons) are difficult to ascertain. Therefore, it was the purpose of this study to describe the incidence of critical illnesses among assembled populations at mass gatherings. An observational prospective study was conducted involving patient encounters at a large, multipurpose, indoor mass-gathering complex in Houston, Texas occurring between Septemver 1, 1996 and June 30,1997. Demographic, treatment, disposition and diagnostic data were analyzed in a computerized database. Of the 3.3 million attendants to the 253 events analyzed during the 10-month study period, there were 2762 (0.08%) patient encounters. Fifty-two percent were women. Mean age was 32 +/- 15.6 years. Of these patients, 51.1% were patrons and the remaining patients were employees or contractors of the facility. A wide variety of illness was seen with trauma (39.5%), headache (31%), and other medical complaints (29.5%) being most frequent. Disposition of the patients included 95.3% being discharged to go back to the event and 2.2% being counseled to seek other medical attention. One hundred twenty-nine patients (4.7%) were referred to the Emergency Department (ED); of these, 70 were transferred for abrasions, lacerations, or skeletal injuries and 13 for chest pain. Of those referred to the ED, 50 (38.7%) patients were transported by ambulance and only 17.4% were admitted to telemetry, with none admitted to an ICU. It is concluded that critical illness at mass gatherings is infrequent, as seen in this study, with very few being admitted to telemetry and none to an ICU. Careful consideration of cost-benefit should occur when determining allocation of resources for these activities. (C) 2003 Elsevier Inc MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Emergency Medicine U5 - J;Article AV - English IS - 0736-4679 UR - ISI:000186880900011 L2 - concerts;sporting events;mass-gathering events;indoor stadium;POP-MUSIC FESTIVALS; MEDICAL-CARE SO - Journal of Emergency Medicine 2003 ;25(4):409-413 9743 UI - 7047 AU - Vazquez-Garciduenas S AU - Palacios RA AU - Segovia-Quiroz J AU - Frias-Hernandez JT AU - Olalde-Portugal V AU - Martinez-de la Vega O AU - Mollard FPO AU - Vazquez-Marrufo G AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Irapuato 36500, Gto, MexicoUniv Michoacana San Nicolas de Hidalgo, Fac Med Dr Ignacio Chavez, Div Estudios Posgrad, Morelia, Michoacan, MexicoUniv Buenos Aires, Fac Ciencias Exactas & Nat, Lab Plantas Vasc, Buenos Aires, DF, ArgentinaUniv Guanajuato, Inst Ciencias Agr, Irapuato, Gto, MexicoVazquez-Marrufo, G, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Km 9-6 Libramiento Norte,Carretera Irapuato Leon, Irapuato 36500, Gto, Mexico TI - Morphological and molecular data to determine the origin and taxonomic status of Prosopis chilensis var. riojana (Fabaceae, Mimosoideae) AB - This study analyzes the morphological and genetic characteristics of three sympatric populations of Prosopis from Argentina. Although morphological and geographical data suggest that Prosopis chilensis var. riojana is an interspecific hybrid of Prosopis chilensis var. chilensis and Prosopis flexuosa var. flexuosa, no correlation was found between morphological traits and genetic distances generated by random amplified polymorphic DNA - polymerase chain reaction (RAPD-PCR). Genetic similarity is greater among P. chilensis var. chilensis and P. flexuosa var. flexuosa than between either of these two taxa with P. chilensis var. riojana. Also, P. chilensis var. riojana has unique genetic markers that are absent from its putative parents. Additionally, dendrograms generated by unweighted pair group method with arithmetic means (UPGMA) and Neighbor-Joining clustering criteria group P. chilensis var. chilensis and P. fexuosa var. flexuosa apart from P. chilensis var. riojana. Possibilities for the lack of congruence between morphology and RAPD markers are discussed. The results obtained are insufficient to conclusively establish the origin of P. chilensis var. riojana; however, the morphological and genetic traits observed suggest this taxon is well differentiated from P. chilensis var. chilensis and P. fexuosa var. fexuosa MH - Argentina MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0008-4026 UR - ISI:000186049300002 L2 - genetic distances;hybridization;morphology;Prosopis;RAPD;rare taxon;GENETIC-VARIATION; RAPD MARKERS; PLANT HYBRIDIZATION; NATURAL HYBRIDS; LEGUMINOSAE; EVOLUTION SO - Canadian Journal of Botany-Revue Canadienne de Botanique 2003 ;81(9):905-917 9744 UI - 7062 AU - Vazquez-Jaime GA AU - Sanchez-Pena SR AU - Landeros-Flores J AU - Guerrero-Rodriguez E AD - Univ Autonoma Agraria Antonio Narro, Dept Parasitol Agr, Coahuila 25315, MexicoSanchez-Pena, SR, Univ Texas, 1 Univ Stn A5000, Austin, TX 78712, USA TI - Effect of substrate on Paecilomyces fumosorouseus mycosis of house fly larvae MH - Mexico|Coahuila MH - USA PB - DALLAS: SOUTHWESTERN ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0147-1724 UR - ISI:000186245200010 L2 - BEAUVERIA-BASSIANA; DIPTERA; VIRULENCE; MUSCIDAE SO - Southwestern Entomologist 2003 ;28(3):223-225 9745 UI - 8726 AU - Vazquez-Juarez RC AU - Barrera-Saldana HA AU - Hernandez-Saavedra NY AU - Gomez-Chiarri M AU - Ascencio F AD - CIBNOR, Dept Patol Marina, La Paz 23000, BCS, MexicoUniv Autonoma de Nuevo Leon, Fac Med, Dept Bioquim, Monterrey, Nueovo Leon, MexicoUniv Rhode Isl, Dept Fisheries Anim & Vet Sci, Kingston, RI 02881, USAAscencio, F, CIBNOR, Dept Patol Marina, POB 128, La Paz 23000, BCS, Mexico TI - Molecular cloning, sequencing and characterization of omp48, the gene encoding for an antigenic outer membrane protein from Aeromonas veronii AB - Aims: To clone, sequence and characterize the gene encoding the Omp48, a major outer membrane protein from Aeromonas veronii . Methods and Results: A genomic library of Aer. veronii was constructed and screened to detect omp48 gene sequences, but no positive clones were identified, even under low stringency conditions. The cloned gene probably was toxic to the host Escherichia coli strain, so the cloning of omp48 was achieved by inverse PCR. The nucleotide sequence of omp48 consisted of an open reading frame of 1278 base pairs. The predicted primary protein is composed of 426 amino acids, with a 25-amino-acid signal peptide and common Ala-X-Ala cleavage site. The mature protein is composed of 401 amino acids with a molecular mass of 44 256 Da. Conclusions: The omp48 gene from Aer. veronii was cloned, sequenced and characterized in detail. BLAST analysis of Omp48 protein showed sequence similarity (over 50%) to the LamB porin family from other pathogenic Gram-negative bacteria. Significance and Impact of the Study: Bacterial diseases are a major economic problem for the fish farming industry. Outer membrane proteins are potentially important vaccine components. The characterization of omp48 gene will allow further investigation of the potential of Omp48 as recombinant or DNA vaccine component to prevent Aer. veronii and related species infections in reared fish MH - Mexico|Baja California Sur MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1364-5072 UR - ISI:000182188300018 L2 - Aeromonas veronii;bacterial outer membrane proteins;LamB;cloning;adhesin;inverse PCR;BASS PARALABRAX-MACULATOFASCIATUS; HELICOBACTER-PYLORI; PROTECTIVE IMMUNITY; VIBRIO-CHOLERAE; ESCHERICHIA-COLI; HYDROPHILA; SALMONICIDA; INFECTION; BINDING; RELEASE SO - Journal of Applied Microbiology 2003 ;94(5):908-918 9746 UI - 7454 AU - Vazquez-Nin GH AU - Echeverria OM AU - Ortiz R AU - Scassellati C AU - Martin TE AU - Ubaldo E AU - Fakan S AD - Univ Lausanne, Ctr Electron Microscopy, CH-1005 Lausanne, SwitzerlandUNAM, Fac Sci, Dept Cell Biol, Electron Microscopy Lab, Mexico City, DF, MexicoUniv Chicago, Dept Mol Genet & Cell Biol, Chicago, IL 60637, USAFakan, S, Univ Lausanne, Ctr Electron Microscopy, Bugnon 27, CH-1005 Lausanne, Switzerland TI - Fine structural cytochemical analysis of homologous chromosome recognition, alignment, and pairing in guinea pig spermatogonia and spermatocytes AB - The nuclei of guinea pig spermatogonia and spermatocytes were studied by means of quantitative autoradiography and electron microscopic methods such as high-resolution cytochemistry, immunocytochemistry, and in situ hybridization. Our observations reveal, in the nucleus of spermatogonia type B, small lampbrush structures of extended chromatin not found in nonmeiotic cells. During meiotic interphase, pairs of parallel lampbrush structures become associated by numerous filaments. The formation of the synaptonemal complex is simultaneous with the extension of chromosomal axes in a continuous leptotene-zygotene stage. Some chromosomes do not recognize their homologs before the onset of the leptotene-zygotene stage and undergo classical leptotene and zygotene stages. The immunocytochemical localization of Dmc1 and Rad51 supports the idea that these proteins are not involved in homology search and final pairing. Immunolocalization of DNA, RNA polymerase 11, heterogeneous nuclear ribonucleoproteins, small nuclear ribonucleoproteins, and the trimethyl-guanosin cap of small nuclear RNAs suggests that the chromatin of lampbrush structures transcribe hnRNA and that splicing is scarce. The results of quantitative autoradiography after [H-3]uridine labeling show an intense transcription accompanied by a very slow export of RNA. In situ hybridization demonstrates the presence of RNA in the regions of homology recognition and pairing. These results lead us to propose that the RNA synthesized in the lampbrush structures is involved in the process of homology searching and recognition MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 1 U4 - Reproductive Biology U5 - J;Article AV - English IS - 0006-3363 UR - ISI:000185457200035 L2 - gametogenesis;meiosis;spermatogenesis;testis;MEIOTIC PROPHASE; MOUSE SPERMATOCYTES; MEIOSIS; PROTEINS; RAD51; LOCALIZATION; DROSOPHILA; COMPLEXES; OOCYTES; SITES SO - Biology of Reproduction 2003 ;69(4):1362-1370 9747 UI - 7357 AU - Vazquez-Rodriguez G AU - Goma G AU - Rols JL AD - Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hgo, MexicoInst Natl Sci Appl, UMR CNRS 5504, UR INRA 792, Ctr Bioingn Gilbert Durand, F-31077 Toulouse 4, FranceUniv Toulouse 3, FRE CNRS 2630, Lab Ecol Hydrosyst, F-31062 Toulouse 4, FranceRols, JL, Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Cd Univ,Carretera Pachuca Tulancingo Km 4-5, Pachuca 42076, Hgo, Mexico TI - Activated sludge as inoculum for ready biodegradability testing: Effect of source AB - Results of ready biodegradability tests (RBT) are barely reproducible owing to a well-known lack of definition in inoculum source and quality. In this study, the degree of variability expected when only activated sludges are used as inoculum source was investigated. For this, the characteristics of activated sludges collected in municipal wastewater treatment plants operating at various massic loading rates (MLR; 0.1, 0.5 and 0.9 kgBOD(5) kgVSS(-1) d(-1)) were compared. In order to provide suitable cellular densities for RBT, inocula were obtained after settling of activated sludges and analyzed in terms of active and cultivable cell densities, dehydrogenasic activity, BOD5 and a general profile of hydrolytic enzymes. In our analysis, biomass obtained from the High-MLR treatment plant constituted the inoculum having the highest biodegradation potential both with respect to microbial densities and to enzyme activities. This biomass also yielded the fastest biodegradation kinetics in dodecyl benzene sulfonate RBT. An attempt of biomass homogenization of inocula on the basis of cultivable cell density and dehydrogenasic activity gave negative results with this chemical compound. Since, in practice, restriction of activated sludge sources may be difficult, our results emphasize the importance of further studies aimed at homogenization of inoculum quality and quantity MH - France MH - Mexico|Hidalgo PB - LONDON: SELPER LTD, PUBLICATIONS DIV RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0959-3330 UR - ISI:000185643400006 L2 - ready biodegradability tests;inoculum;activated sludge;biodegradation potential;POPULATION-DENSITY; BACTERIA SO - Environmental Technology 2003 ;24(8):979-987 9748 UI - 9057 AU - Vazquez-Semadeni E AU - Ballesteros-Paredes J AU - Klessen RS AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoAstrophys Inst Potsdam, D-14482 Potsdam, GermanyVazquez-Semadeni, E, Univ Nacl Autonoma Mexico, Inst Astron, Campus Morelia,Apdo Postal 3-72, Morelia 58089, Michoacan, Mexico TI - A holistic scenario of turbulent molecular cloud evolution and control of the star formation efficiency: First tests AB - We compile a holistic scenario for molecular cloud (MC) evolution and control of the star formation efficiency (SFE) and present a first set of numerical tests of it. A lossy compressible cascade can generate density fluctuations and further turbulence at small scales from large-scale motions, implying that the turbulence in MCs may originate from the compressions that form them. Below a sonic scale lambda(s), turbulence cannot induce any further subfragmentation nor can it be a dominant support agent against gravity. Since progressively smaller density peaks contain progressively smaller fractions of the mass, we expect the SFE to decrease with decreasing lambda(s), at least when the cloud is globally supported by turbulence. Our numerical experiments confirm this prediction. We also find that the collapsed mass fraction in the simulations always saturates below 100% efficiency. This may be due to the decreased mean density of the leftover interclump medium, which in real clouds (not confined to a box) should then be more easily dispersed, marking the "death" of the cloud. We identify two different functional dependences ("modes") of the SFE on lambda(s), which roughly correspond to globally supported and unsupported cases. Globally supported runs with most of the turbulent energy at the largest scales have similar SFEs to those of unsupported runs, providing numerical evidence of the dual role of turbulence, whereby turbulence, besides providing support, induces collapse at smaller scales through its large-scale modes. We tentatively suggest that these modes may correspond to the clustered and isolated modes of star formation, although here they are seen to form part of a continuum rather than being separate modes. Finally, we compare with previous proposals that the relevant parameter is the energy injection scale MH - Germany MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 36 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000181287300014 L2 - ISM : clouds;stars : formation;turbulence;INTERSTELLAR-MEDIUM; GRAVITATIONAL COLLAPSE; VELOCITY STRUCTURE; STELLAR CLUSTERS; JEANS COLLAPSE; FRAGMENTATION; FLOWS; INSTABILITIES; DENSITY; MODELS SO - Astrophysical Journal 2003 ;585(2):L131-L134 9749 UI - 6614 AU - Vazquez BA AU - Caballero A AU - Pena P AD - Univ Autonoma Nuevo Leon, Monterrey, Nuevo Leon, MexicoVazquez, BA, CSIC, Inst Ceram & Vidrio, Campus UAM Cantoblanco, E-28049 Madrid, Spain TI - Quaternary system Al2O3-CaO-MgO-SiO2: I, study of the crystallization volume of Al2O3 AB - Compatibility relations of Al2O3 in the quaternary system Al2O3-CaO-MgO-SiO2 were studied by firing and quenching followed by microstructural and energy-dispersive X-ray examination. A projection of the liquidus surface of the primary phase volume of Al2O3 was constructed in terms of the CaO, SiO2, and MgO contents of the mixtures recalculated to 100 wt%. Two invariant points, where four solids coexist with a liquid phase, were defined, and the positions of the isotherms were tentatively established. The effect of SiO2, MgO, and CaO impurities on Al2O3 growth also was studied MH - Mexico|Nuevo Leon MH - Spain PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000187451800031 L2 - AL2O3-MGO-CAO; SPINEL; PART SO - Journal of the American Ceramic Society 2003 ;86(12):2195-2199 9750 UI - 6606 AU - Vazquez GJ AU - Del Castillo-Mussot M AU - Spector HN AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoIIT, Dept Phys, Chicago, IL 60616, USASpector, HN, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Transverse Stark effect of electrons in a semiconducting quantum wire AB - We investigate the effect of an electric field applied tranversely to the axis of cylindrical symmetry of a cylindrical quantum wire on the ground-state energy of the electrons in the wire using an infinite confining potential well model. For low electric fields, we find a quadratic shift of the energy levels with the electric field; while for strong fields, the Stark shift of the ground-state energy increases almost linearly with the electric field. This increase is greater for wide wires, but for narrow wires, the Start, shift. of the ground-state energy does not change much with the electric field. Also, at higher electric fields, the Stark shift of the ground-state energy increases with increasing wire radius. This will lead to the decrease of the effective bandgap of a semiconducting quantum wire with electric field. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Mexico|Distrito Federal MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000187566600013 L2 - EXCITON ENERGIES; WELL WIRES; FIELD; ABSORPTION SO - Physica Status Solidi B-Basic Research 2003 ;240(3):561-564 9751 UI - 7538 AU - Vazquez GV AU - Townsend PD AU - Maghrabi M AU - Bauer T AU - Gonzalez M AD - Univ Sussex, EIT, Brighton BN1 9QH, E Sussex, EnglandCtr Invest Opt, Leon 37150, Gto, MexicoHashemite Univ, Dept Phys, Zarqa 13115, JordanLaserzentrum, D-30419 Hannover, GermanyCIEMAT, Dept Fus, E-28040 Madrid, SpainTownsend, PD, Univ Sussex, EIT, Pevensey Bldg, Brighton BN1 9QH, E Sussex, England TI - Characterisation and improvements of the surface of optical materials: relevance to waveguide lasers AB - The production of waveguides and photonic devices in the outer layers of bulk material requires a higher quality surface than is necessary for bulk structures. It is therefore necessary not only to consider surface preparation and guide fabrication but also methods of monitoring the guide material for defects over the depth of the waveguide. Characterisation can often be conveniently achieved in a non-destructive fashion by optical means, in particular by luminescence. Waveguides have been fabricated in many photonic materials and the examples cited focus on Nd:YAG as a crystalline host lattice and silica as an example of a glass. Not only are they archetypal in terms of luminescence responses to surface modifications, but also they can be readily fabricated as optical waveguides. Special mention is made of ion beam waveguide fabrication since this has been successful in nearly 100 types of insulator. New and less familiar related methods using ion beam modification for surface chemistry, chemical etching and SEM, are presented, together with examples of lattice and surface restructuring via pulsed laser anneals. The generic methods of surface preparation, characterisation of near surface defect features, and defect removal, are presented MH - United Kingdom MH - Germany MH - Jordan MH - Mexico|Guanajuato MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000185102500027 L2 - ND-YAG; 2ND-HARMONIC GENERATION; ION-IMPLANTATION; LUMINESCENCE CHARACTERIZATION; FLUOROZIRCONATE GLASS; PHASE-TRANSITIONS; CATHODOLUMINESCENCE; THERMOLUMINESCENCE; LINBO3 SO - Physica Status Solidi A-Applied Research 2003 ;198(2):465-477 9752 UI - 8290 AU - Vazquez GV AU - Rickards J AU - Lifante G AU - Domench M AU - Cantelar E AD - Ctr Invest Opt, Guanajuato 37150, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat C4, Madrid 28049, SpainVazquez, GV, Ctr Invest Opt, Loma Bosque 115, Guanajuato 37150, Mexico TI - Low dose carbon implanted waveguides in Nd : YAG AB - For the first time to our knowledge, carbon implantation into YAG crystals doped with Nd has been used to produce optical waveguides. A considerable index decrease in the nuclear region (i.e., the region where the energetic ions stop) of similar to2.5% was obtained with a low dose implant, while giving an index enhancement in the guiding region of similar to0.35%. After an annealing step necessary to recover the transparency of the crystals, the layer of reduced refractive index produced by implantation is preserved. Spectroscopic studies carried out in a waveguiding configuration show that emission bands coming from the F-4(3/2) level present a slight broadening, while its associated lifetime is similar to that reported in bulk crystals ( 240 mus). (C) 2003 Optical Society of America MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 15 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000183248900006 L2 - WAVE-GUIDE LASERS; LINBO3 SO - Optics Express 2003 ;11(11):1291-1296 9753 UI - 8908 AU - Vazquez GV AU - Rickards J AU - Marquez H AU - Lifante G AU - Cantelar E AU - Domenech M AD - Ctr Invest Opt, Leon 37000, Gto, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCICESE, Dept Opt, Ensenada 22860, Baja California, MexicoUniv Autonoma Madrid, Dept Fis Mat C 4, E-28049 Madrid, SpainVazquez, GV, Ctr Invest Opt, Loma Bosque 115,Apdo Postal 1-948, Leon 37000, Gto, Mexico TI - Optical waveguides in Nd : YAG by proton implantation AB - Proton implantation has been used to produce optical waveguides in Nd:YAG. Two- and four-implant guides have been characterised by the dark mode method and by spectroscopic studies. A very small index enhancement was obtained as it was expected in this material as well as other insulators. It is shown that the luminescence properties of the Nd ions are not significantly altered by the ion beam process, thus maintaining the crystal quality in the guiding region. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000181641000020 L2 - WAVE-GUIDE LASERS; LINBO3 SO - Optics Communications 2003 ;218(1-3):141-146 9754 UI - 8022 AU - Vazquez O AU - Herrera JN AU - Blum L AD - Benemerita Univ Autonoma Puebla, Fac Ciencias Fis & Matemat, Puebla 72000, MexicoBenemerita Univ Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Puebla 72570, MexicoUniv Puerto Rico, Dept Phys, Rio Piedras, PR 00931, USAHerrera, JN, Benemerita Univ Autonoma Puebla, Fac Ciencias Fis & Matemat, Apdo Postal 1152,Col Ctr, Puebla 72000, Mexico TI - Static structure factor and thermodynamic properties of a binary Yukawa mixture AB - We use the solution of the Ornstein Zernike equation in the mean spherical approximation to find the static structure factor for a hard spheres Yukawa fluid. The thermodynamic and the structure properties of this fluid are given in terms of an accumulative parameter F, which satisfies a polynomial equation of degree n greater than or equal to 4. This parameter is obtained mumerically by an iterative method. We study binary mixtures with a factored interaction for which the classical Lorentz-Berthelot rules are satisfied. Our result for the static structure factor and thermodynamics properties are in good agreement with the computer simulations and former numerical solutions. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000183909400002 L2 - Yukawa fluid;mean spherical approximation;static structure factor;thermodynamic properties;cummulative parameter;iterative method;MEAN-SPHERICAL-APPROXIMATION; ORNSTEIN-ZERNIKE EQUATION; CHARGED HARD-SPHERES; FLUID MIXTURES; MSA SOLUTION; FREE-ENERGY; CLOSURE; MODEL; LIQUID; SYSTEM SO - Physica A-Statistical Mechanics and Its Applications 2003 ;325(3-4):319-332 9755 UI - 6658 AU - Vazquez R AU - Miranda LF AU - Olguin L AU - Torrelles JM AU - Lopez JA AD - UNAM, Inst Astron, Ensenada, Baja California, Mexico. CSIC, Inst Astrofis Andalucia, Granada, Spain. UNAM, Astron Inst, Mexico City, DF, Mexico. CSIC, IEEC, Barcelona, Spain. CSIC, Inst Ciencias Espacio, Barcelona, Spain TI - The structure of NGC 6309: BRET or bipolar outflow? AB - Multiwavelength and multitechnique observations towards NGC 6309 are presented. The data consist of lambda3.6-cm continuum, ground and space-based imaging, and high and low-dispersion longslit spectra. The structure of the central region seems to be a distorted, ring of 20" in diameter. The lack of [N-II] emission is conspicuous, as revealed by imaging and low dispersion spectra. Notably, the kinematics of the point-symmetric (PS) structures of NGC 6309 indicates the presence of lobes or cavities as those generally found in bipolar nebulae. The results lead to conclude that the origin of this peculiar morphology is not related to BRETs, but rather to that of a bipolar PN with PS structures in its lobes MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Spain T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400169 SO - 2003 ;(209):537-538 9756 UI - 7614 AU - Vega-Corona A AU - varez-Vellisco A AU - Andina D AD - Univ Guanajuato, FIMEE, Guanajuato, MexicoUniv Politecn Madrid, Dept SSR & ICS, Madrid, SpainVega-Corona, A, Univ Guanajuato, FIMEE, Guanajuato, Mexico TI - Feature vectors generation for detection of microcalcifications in digitized mammography using neural networks AB - This paper presents and tests a methodology that sinergically combines a select of successful advances in each step to automatically classify microcalcifications (MCs) in digitized mammography. The method combines selection of regions of interest (ROI), enhancement by histogram adaptive techniques, processing by multiscale wavelet and gray level statistical techniques, generation, clustering and labelling of suboptimal feature vectors (SFVs), and a Neural feature selector and detector to finally classify the MCs. The experimental results with the method promise interesting advances in the problem of automatic detection and classification of MCs1 MH - Mexico|Guanajuato MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000185042300074 SO - Artificial Neural Nets Problem Solving Methods, Pt Ii 2003 ;2687():583-590 9757 UI - 8632 AU - Vega-Lopez F AD - London Sch Hyg & Trop Med, Univ Coll London Hosp NHS Trust, London WC1, EnglandIMSS, Natl Med Ctr, Mexico City, DF, MexicoVega-Lopez, F, Middlesex Hosp, Dept Dermatol, Arthur Stanley House 1st Floor,Tottenham St, London W1N 8AA, England TI - Diagnosis of cutaneous leishmaniasis AB - Purpose of review The purpose of this review is to discuss some of the most important issues in the clinical and laboratory diagnosis of cutaneous leishmaniasis. The former is based on clinical experience and the latter on the literature published within the last couple of years. The sensitivity and specificity of old and novel tests to identify the parasite, antigenic products, the host's immune response, and the molecular diagnosis by the PCR are considered here. Recent findings Recent clinical and laboratory research has addressed the individual, entomological, and epidemiological aspects of acute and chronic forms of cutaneous leishmaniasis. Traditional diagnostic investigations for individual cases include the search of suggestive history and clinical features, the identification of amastigotes by histology or direct microscopy, and the growth of promastigotes in culture. Diagnosis by the polymerase chain reaction seems to be approaching a 'gold standard' status as novel techniques offer considerable advantages in the collection and transport of specimens and DNA extraction procedures that are more efficient in individual and field-based protocols. Several authors have reported consistent 100% specificity with increasing sensitivity that overall is between 92 and 98%. Moreover the PCR approach makes possible the fast identification at the Leishmania species and subspecies level. Summary The diagnostic tools discussed in this review are relevant not only for the diagnosis in endemic regions of the world but also for travellers and workers that following exposure return to non-endemic countries MH - United Kingdom MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 19 U4 - Infectious Diseases U5 - J;Review AV - English IS - 0951-7375 UR - ISI:000182543300006 L2 - cutaneous leishmaniasis;diagnosis;laboratory diagnosis;PCR;VIANNIA BRAZILIENSIS; DNA EXTRACTION; NEW-WORLD; PCR; AMPLIFICATION; ASSAY SO - Current Opinion in Infectious Diseases 2003 ;16(2):97-101 9758 UI - 8220 AU - Vega E AU - Reyes E AU - Wellens A AU - Sanchez G AU - Chow JC AU - Watson JG AD - Inst Mexicano Petr, Programa Investigac Medio Ambiente & Seguridad, Mexico City 07730, DF, MexicoUniv Nacl Autonoma Mexico, DEPFI, Mexico City 04510, DF, MexicoDesert Res Inst, Reno, NV 89512, USAVega, E, Inst Mexicano Petr, Programa Investigac Medio Ambiente & Seguridad, Eje Cent Lazaro Cardenas Num 152, Col San Bartolo, Mexico City 07730, DF, Mexico TI - Comparison of continuous and filter based mass measurements in Mexico City AB - US EPA federal equivalent method (FEM), the tapered element oscillating microbalance (TEOM) (Rupprecht and Pattachnick, Albany, NY) for measuring continuous hourly PM10, was collocated with a filter-based federal reference method (FRM), the PM10 sequential filter sampler (SFS), at five sites in Mexico City during February and March, 1997. A PM10 mass comparison showed significant differences between instruments that exceeded the expected uncertainties. In general, the TEOM measured higher and more variable PM10 than the SFS. It was found that when averaging 24h of PM10 concentrations, exposures to very high levels were missed. The TEOM measurements exhibited much less spatial variations across different sites than the similar comparison of SFS measurements. The mass and chemical composition of the SFS measurements showed that the majority of the PM10 mass can be explained by the measured elemental, ionic, and carbon concentrations. This analysis shows that TEOM and filter-based PM10 cannot be used interchangeably to determine temporal and spatial distributions in Mexico City during 1997. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000183644000006 L2 - particulate matter;particulate matter measurements;Mexico city;reference methods;equivalent methods;ELEMENT OSCILLATING MICROBALANCE; PM10; PM2.5; AEROSOL; MONITOR; TEOM(R); CARBON; UK SO - Atmospheric Environment 2003 ;37(20):2783-2793 9759 UI - 7511 AU - Vega FJ AU - Garcia-Barrera P AU - Coutino M AU - Nyborg T AU - Cifuentes-Ruiz P AU - Gonzalez-Rodriguez K AU - Martens A AU - Delgado CR AU - Carbot G AD - UNAM, Inst Geol, Mexico City 04510, DF, MexicoUNAM, Fac Ciencias, Mexico City 04510, DF, MexicoInst Hist Nat & Ecol, Museo Paleontol, Tuxtla Gutierrez 29000, Chiapas, MexicoLoma Linda Univ, Dept Nat Sci, Loma Linda, CA 92350, USAUniv Autonoma Estado Hidalgo, Ctr Invest Biol, Museo Paleontol, Pachuca 42184, Hidalgo, MexicoMUDE, SEPC, Dept Paleontol, Saltillo 25015, Coahuila, MexicoVega, FJ, UNAM, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Early Cretaceous arthropods from plattenkalk facies in Mexico AB - Several well-preserved arthropod faunas have been studied in Mexico during the past few years. The purpose of the present note is to outline advances in the study of these arthropods and of their paleoenvironmental implications, from four localities. The age for these localities ranges from the Early to the Late Cretaceous. At most of these localities lithographic limestones crop out, with fish remains representing the most attractive element of study. However, arthropods constitute a very important tool for reconstructing paleoenvironment (marine crustaceans, freshwater and terrestrial insects and arachnids). Detailed studies of these assemblages will aid in our understanding of ancient coastal dynamics and the paleoecology of these unique environments MH - Mexico|Chiapas MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - USA PB - LELYSTAD: S P B ACADEMIC PUBLISHING BV RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0067-8546 UR - ISI:000185222100024 L2 - cretaceous;plattenkalk;Arthropoda;Mexico SO - Contributions to Zoology 2003 ;72(2-3):187-189 9760 UI - 7430 AU - Vega IR AU - Sarkar S AD - Technol Inst Chihuahua, Chihuahua 31310, Chih, MexicoUniv S Florida, Dept Comp Sci & Engn, Tampa, FL 33620, USAVega, IR, Technol Inst Chihuahua, Ave Tecnol 2909, Chihuahua 31310, Chih, Mexico TI - Statistical motion model based on the change of feature relationships: Human gait-based recognition AB - We offer a novel representation scheme for view-based motion analysis using just the change in the relational statistics among the detected image features, without the need for object models, perfect segmentation, or part-level tracking. We model the relational statistics using the probability that a random group of features in an image would exhibit a particular relation. To reduce the representational combinatorics of these relational distributions, we represent them in a Space of Probability Functions (SoPF), where the Euclidean distance is related to the Bhattacharya distance between probability functions. Different motion types sweep out different traces in this space. We demonstrate and evaluate the effectiveness of this representation in the context of recognizing persons from gait. In particular, on outdoor sequences 1) we demonstrate the possibility of recognizing persons from not only walking gait, but running and jogging gaits as well, 2) we study recognition robustness with respect to view-point variation, and 3) we benchmark the recognition performance on a database of 71 subjects walking on soft grass surface, where we achieve around 90 percent recognition rates in the presence of viewpoint variation MH - Mexico|Chihuahua MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0162-8828 UR - ISI:000185460800012 L2 - biometrics;gait recognition;relational statistics;probabilistic modeling SO - Ieee Transactions on Pattern Analysis and Machine Intelligence 2003 ;25(10):1323-1328 9761 UI - 7083 AU - Vega R AU - Pinero D AU - Ramanankandrasana B AU - Dumas M AU - Bouteille B AU - Fleury A AU - Sciutto E AU - Larralde C AU - Fragoso G AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, MexicoFac Med Limoges, Inst Epidemiol Neurol & Neurol Trop, F-87025 Limoges, FranceInst Nacl Neurol & Neurocirurg, Mexico City 14269, DF, MexicoCtr Int Ciencias, Cuernavaca 62131, Morelos, MexicoVega, R, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Circuito Interior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Population genetic structure of Taenia solium from Madagascar and Mexico: implications for clinical profile diversity and immunological technology AB - Taenia solium is a cestode parasitic of humans and pigs that strongly impacts on public health in developing countries. Its larvae (cysticercus) lodge in the brain, causing neurocysticercosis, and in other tissues, like skeletal muscle and subcutaneous space, causing extraneuronal cysticercosis. Prevalences of these two clinical manifestations vary greatly among continents. Also, neurocysticercosis may be clinically heterogeneous. ranging from asymptomatic forms to severely incapacitating and even fatal presentation. Further, vaccine design and diagnosis technology have met with difficulties in sensitivity, specificity and reproducibility. Parasite diversity underlying clinical heterogeneity and technological difficulties is little explored. Here, T. solium genetic population structure and diversity was studied by way of random amplified polymorphic DNA in individual cysticerci collected from pigs in Madagascar and two regions in Mexico. The amplification profiles of T solium were also compared with those of the murine cysticercus Taenia crassiceps (ORF strain). We show significant genetic differentiation between Madagascar and Mexico and between regions in Mexico, but less so between cysticerci from different localities in Mexico and none between cysticerci from different tissues from the same pig. We also found restricted genetic variability within populations and gene flow was estimated to be low between populations. Thus, genetic differentiation of T solium suggests that different evolutionary paths have been taken and provides support for its involvement in the differential tissue distribution of cysticerci and varying degrees of severity of the disease. It may also explain difficulties in the development of vaccines and tools for immunodiagnosis. (C) 2003 Australian Society for Parasitology Inc. Published by Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Parasitology U5 - J;Article AV - English IS - 0020-7519 UR - ISI:000186387500005 L2 - Taenia solium;cysticercosis;random amplified polymorphic DNA;genetic variability;population structure;HUMAN CYSTICERCOSIS; CENTRAL-AMERICA; DIAGNOSIS; NEUROCYSTICERCOSIS; CRASSICEPS; PREVALENCE; ANTIGENS; DISEASE; HUMANS; MURINE SO - International Journal for Parasitology 2003 ;33(13):1479-1485 9762 UI - 6940 AU - Velasco-Santos C AU - Martinez-Hernandez AL AU - Fisher FT AU - Ruoff R AU - Castano VM AD - Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Santiago De Queretaro 76000, Queretaro, MexicoUniv Autonoma Queretaro, Santiago De Queretaro 76010, Queretaro, MexicoNorthwestern Univ, Dept Mech Engn, Evanston, IL 60208, USACastano, VM, Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, AP 1-1010, Santiago De Queretaro 76000, Queretaro, Mexico TI - Improvement of thermal and mechanical properties of carbon nanotube composites through chemical functionalization AB - Chemically functionalized multiwalled carbon nanotubes were incorporated into a polymer matrix by in situ polymerization, to improve the transfer of mechanical load through a chemical bond, which was demonstrated by Raman and infrared spectroseopies. The resulting composite shows higher storage modulus (E) and tensile strength than existing similar composites, with only 1 wt % of functionalized nanotubes. E' at 90 degreesC is increased by an outstanding 1135% and the glass transition temperature is exceptionally raised by congruent to40 degreesC MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 63 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000186598700020 L2 - POLY(METHYL METHACRYLATE); LOAD-TRANSFER; SPECTROSCOPY; STRENGTH; RAMAN; POLYSTYRENE; MODULUS SO - Chemistry of Materials 2003 ;15(23):4470-4475 9763 UI - 7969 AU - Velasco-Santos C AU - Martinez-Hernandez AL AU - Fisher F AU - Ruoff R AU - Castano VM AD - Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Santiago De Queretaro 76000, Queretaro, MexicoUniv Autonoma Queretaro, Santiago De Queretaro 76010, Queretaro, MexicoNorthwestern Univ, Dept Mech Engn, Evanston, IL 60208, USACastano, VM, Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, AP 1-1010, Santiago De Queretaro 76000, Queretaro, Mexico TI - Dynamical-mechanical and thermal analysis of carbon nanotube-methyl-ethyl methacrylate nanocomposites AB - Composites were prepared by using carbon nanotubes (CNTs) and methyl-ethyl methacrylate copolymer, modified with nonionic surfactant to improve the carbon nanotube dispersion and workability. The thermal results show that the polymer glass transition temperature increases up to 10degreesC and that only 1 wt% CNT content improves the mechanical response by more than 200%, substantially above other reports where large quantities of CNTs were used MH - Mexico|Queretaro MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 30 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000184086900013 L2 - POLYMER COMPOSITES; CONJUGATED-POLYMER; CHEMICAL FUNCTIONALIZATION; RAMAN-SPECTROSCOPY; LOAD-TRANSFER; MATRIX; CONDUCTIVITY; DEFORMATION; ALIGNMENT; STRENGTH SO - Journal of Physics D-Applied Physics 2003 ;36(12):1423-1428 9764 UI - 9042 AU - Velasco I AU - Velasco-Velazquez MA AU - Salazar P AU - Lajud N AU - Tapia R AD - Univ Nacl Autonoma Mexico, Dept Neurociencias, Inst Fisiol Celular, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City, DF, MexicoVelasco, I, NINDS, Mol Biol Lab, NIH, 36 Convent Dr,Bldg 36,room 3C12, Bethesda, MD 20892 USA TI - Influence of serum-free medium on the expression of glutamate transporters and the susceptibility to glutamate toxicity in cultured cortical neurons AB - The presence of glia and glial glutamate transporters seems to modify glutamate-mediated toxicity in neuronal cultures. In this work we cultured cortical cells in serum-containing medium and in a serum-free medium (Neurobasal medium + B27 supplement) and studied the expression of the glutamate transporters GLAST, GLT, and EAAC by immunocytochemistry and RT-PCR. The proportion of glial cells was below 10% in the Neurobasal medium and 46% in the serum-containing medium. Semiquantitative evaluation of the mRNA for the glutamate transporters showed similar amounts in cells grown in serum-free and serum-containing media. We detected immunoreactivity for the three transporters in both media, but EAAC was coexpressed with the neuronal marker MAP2, whereas GLAST and GLT predominated in nonneuronal cells. When the cultures were treated with glutamate for 15 min, the cultures in serum-containing medium showed a clear concentration-dependent neuronal death, whereas cells primed in this medium and switched to Neurobasal medium, as well as cells grown only in the latter, were less sensitive to glutamate concentrations up to 1 mM. A similar difference in the sensitivity to excitotoxicity was observed when the glutamate uptake inhibitor L-trans-2,4-pyrrolidine-dicarboxylate was applied during 6 hr, although the accumulation of extracellular glutamate was similar in the two media. We conclude that glutamate transporters with the culture conditions studied are sensitive to glutamate uptake inhibition and that Neurobasal/B27 medium protects cells against excitotoxicity. (C) 2003 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 7 U4 - Neurosciences U5 - J;Article AV - English IS - 0360-4012 UR - ISI:000181327400008 L2 - glutamate toxicity;glutamate transporters;neuronal cultures;pyrrolidine dicarboxylate;serum-free medium;RAT HIPPOCAMPAL-NEURONS; EXTRACELLULAR GLUTAMATE; CEREBRAL-CORTEX; L-GLUTAMATE TRANSPORT; NERVOUS-SYSTEM; IN-VIVO; GLT-1; NEUROTOXICITY; INHIBITION; DAMAGE SO - Journal of Neuroscience Research 2003 ;71(6):811-818 9765 UI - 8754 AU - Velasco VR AU - Gaggero-Sager LM AU - Tutor J AD - CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, SpainUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv La Habana, Inst Mat & Reactivos, Havana 10400, CubaVelasco, VR, CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain TI - Tight-binding calculation of the electronic band structure of GaN, AlN and BN (001) ideal surfaces AB - We study the electronic band structure of the zinc-blende phase (001) ideal surface of GaN, AlN and BN by means of an empirical tight binding sp(3)s* Hamiltonian with nearest-neighbour interactions plus some second-neighbour interactions and the surface Green function matching method. We have studied both anion and cation terminated surfaces and we have obtained the different surface states with their corresponding spectral localization and orbital character. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000181957100029 L2 - surface electronic phenomena (work function, surface potential, surface states, etc.);nitrides;semiconducting surfaces;MOLECULAR-BEAM EPITAXY; GALLIUM NITRIDE; WURTZITE GAN; CUBIC GAN; GAAS; RECONSTRUCTIONS; SEMICONDUCTORS; STOICHIOMETRY; GAN(001); MODELS SO - Surface Science 2003 ;529(1-2):267-273 9766 UI - 8011 AU - Velazquez-Quintana M AU - ias-Islas MA AU - Rivera-Olmos V AU - Lozano-Zarate J AD - Hosp Reg 1, IMSS, Chihuahua, MexicoBaylor Coll Med, Dept Neurol, Houston, TX 77030, USA TI - Multiple sclerosis in Mexico: A multicentre study AB - Introduction. Multiple sclerosis (MS) is considered to he a low prevalence disease in Mexico; its characteristics have been described in isolated studies in small populations concentrated in a single region of the country and using heterogeneous methodological tools. Aims. In this study, our aim was define the clinical profile and some socio-demographic aspects of MS in Mexico using validated homogeneous criteria and tools. Patients and methods. Eight hospitals representing the five most densely populated regions of the country, the north, centre and south of Mexico, took part in the study. Data were obtained through a survey created, validated and published in Spanish (kappa-interobserver 0.73 and kappa-intraobserver 0. 76), which consisted of 142 questions arranged in 10 sections and which was applied by 12 neurologists. The procedure was verified with 50 randomly selected surveys. A total of 337 surveys were applied, which were analysed by descriptive statistics using the EP1 INFO, version 6.04b, software application. All the patients presented MS that had been clinically defined with the help of paraclinical studies according to Schumaher and Poser's criteria. Results. A sample of 337 patients was studied; 99.1% were mestizos, with an average age of 37 +/-9 years, 69.7% were females and 30.3% males. 95% had access to the Social Security system and 96% had been born in Mexico to Mexican parents. No cases were found among native Mexicans. The clinical profile of the disease did not differ to that reported in other countries; the pattern observed corresponded to that found in northern latitudes. Conclusion. This is the first multicentre study carried out in Mexico with a population that is highly representative of the whole country and with a homogeneous methodology MH - Mexico|Chihuahua MH - USA PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000183882200005 L2 - demyelinisation;multiple sclerosis;multiple sclerosis epidemiology;TWINS SO - Revista de Neurologia 2003 ;36(11):1019-1022 9767 UI - 9157 AU - Velazquez-Ulloa N AU - Blackshaw SE AU - Szczupak L AU - Trueta C AU - Garcia E AU - De-Miguel FF AD - UNAM, Inst Fisiol Celular, Dept Biofis, Mexico City 04510, DF, MexicoUniv Oxford, Dept Human Anat & Genet, Oxford, EnglandUniv Buenos Aires, Fac Ciencias, Buenos Aires, DF, ArgentinaUniv Colima, Ctr Invest Biomed, Colima, MexicoDe-Miguel, FF, UNAM, Inst Fisiol Celular, Dept Biofis, Apartado Postal 70-253, Mexico City 04510, DF, Mexico TI - Convergence of mechanosensory inputs onto neuromodulatory serotonergic neurons in the leech AB - By the frequency-dependent release of serotonin, Retzius neurons in the leech modulate diverse behavioral responses of the animal. However, little is known about how their firing pattern is produced. Here we have analyzed the effects of mechanical stimulation of the skin and intracellular stimulation of mechanosensory neurons on the electrical activity of Retzius neurons. We recorded the electrical activity of neurons in ganglia attached to their corresponding skin segment by segmental nerve roots, or in isolated ganglia. Mechanosensory stimulation of the skin induced excitatory synaptic potentials (EPSPs) and action potentials in both Retzius neurons in a ganglion. The frequency and duration of responses depended on the strength and duration of the skin stimulation. Retzius cells responded after T and P cells, but before N cells, and their sustained responses correlated with the activity of P cells. Trains of five impulses at 10 Hz in every individual T, P, or N cell in isolated ganglia produced EPSPs and action potentials in Retzius neurons. Responses to T cell stimulation appeared after the first impulse. In contrast, the responses to P or N cell stimulation appeared after two or more presynaptic impulses and facilitated afterward. The polysynaptic nature of all the synaptic inputs was shown by blocking them with a high calcium/magnesium external solution. The rise time distribution of EPSPs produced by the different mechanosensory neurons suggested that several interneurons participate in this pathway. Our results suggest that sensory stimulation provides a mechanism for regulating serotonin-mediated modulation in the leech. (C) 2003 Wiley Periodicals, Inc MH - Argentina MH - United Kingdom MH - Mexico|Colima MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0022-3034 UR - ISI:000181061000006 L2 - modulation;synaptic transmission;serotonin;sensory neuron;leech;MEDICINAL LEECH; HORSERADISH-PEROXIDASE; INTRACELLULAR INJECTION; NERVOUS-SYSTEM; MOTOR NEURONS; MODULATION; BEHAVIOR; REFLEX; RHYTHM; AGGRESSION SO - Journal of Neurobiology 2003 ;54(4):604-617 9768 UI - 9274 AU - Velazquez A AU - Lazaro A AU - Pradell L AU - Comeron A AD - Tech Univ Catalonia, Dept Signal Theory & Commun, Barcelona 08034, SpainCtr Invest Cientifica & Educ Super Ensenada, Dept Elect & Telecomun, Ensenada 22860, Baja California, MexicoVelazquez, A, Tech Univ Catalonia, Dept Signal Theory & Commun, Jordi Girona 1-3,Campus Nord, Barcelona 08034, Spain TI - Application of CAD load-pull techniques in mixer design AB - This work describes the application of a commercial CAD soft-ware to implement load-pull techniques in the design of microwave mixers. This method is used to generate conversion-loss regions when a diode is pumped and operated as a mixer circuit. Emphasis placed on the inclusion of image and out-of-band terminations to optimize the operating conditions required to obtain low conversion loss, An X-band 5-dB conversion-loss mixer is designed and tested using this method. (C) 2003 Wiley Periodicals. Inc MH - Mexico|Baja California MH - Spain PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000180792800025 L2 - load pull;mixers;microwaves;harmonic balance;conversion loss SO - Microwave and Optical Technology Letters 2003 ;36(4):320-323 9769 UI - 8393 AU - Velazquez G AU - Herrera-Gomez A AU - Martin-Polo MO AD - CINVESTAV Queretaro, Queretaro 76230, Qro, MexicoOregon State Univ, Corvallis, OR 97331, USAUniv Autonoma Queretaro, Fac Quim, DIPA, Queretaro 76010, Qro, MexicoHerrera-Gomez, A, CINVESTAV Queretaro, Libramiento Norponiente 2000, Queretaro 76230, Qro, Mexico TI - Theoretical determination of first adsorbed layer of water in methylcellulose AB - Analytical predictions for first adsorption layer of water as a function of relative humidity in hydrophilic materials were developed using multilayer adsorption theories (BET and GAB). These predictions were compared with experimental values of bound water adsorbed by methylcellulose reported in a previous paper. A proper analysis method is proposed that improves the determination of the physical parameters employed by the GAB theory. The applicability of the GAB and BET adsorption models employed in the study of condensable vapors or gas condensation is discussed. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000183033500005 L2 - MOISTURE SORPTION ISOTHERMS; PERMEABILITY; TEMPERATURE; ADSORPTION; RAISINS; FOODS SO - Journal of Food Engineering 2003 ;59(1):45-50 9770 UI - 8394 AU - Velazquez G AU - Herrera-Gomez A AU - Martin-Polo MO AD - CINVESTAV Queretaro, Queretaro 76230, MexicoOregon State Univ, Corvallis, OR 97331, USAUniv Autonoma Queretaro, Fac Quim, DIPA, Queretaro 76010, Qro, MexicoHerrera-Gomez, A, CINVESTAV Queretaro, Libramiento Norponiente 2000, Queretaro 76230, Mexico TI - Identification of bound water through infrared spectroscopy in methylcellulose AB - This paper describes the interaction of water with solid polymers. A portion of the water adsorbed in hydrophilic materials is strongly bound to individual sites (bound water), while an additional amount is bound less firmly to the polymeric chain (free water). Both, free and bound water, have been the subject of many studies that have uncovered, in some cases, qualitative evidence of the presence of bound water. In this paper we report a method to quantify the fraction of water adsorbed in the first layer in contact with an hydrophilic material. The measurement was carried out on infrared spectroscopy data of methylcellulose films exposed to several humid environments. The quantification was based on the determination of the change in the natural vibration frequency brought about by the interaction of water molecules with the solid. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Queretaro MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000183033500009 L2 - HYDROPHOBIC FILMS; MECHANICAL-PROPERTIES; MOISTURE TRANSFER; PHYSICAL STATE; PERMEABILITY; VAPOR; THERMOGELATION; CRYSTALLINITY; RELAXATION; EFFICIENCY SO - Journal of Food Engineering 2003 ;59(1):79-84 9771 UI - 8772 AU - Velazquez V AU - Hirsch JG AU - Frank A AU - Zuker AP AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Strasbourg 1, IRES, CNRS, IN2P3, F-67037 Strasbourg 2, FranceVelazquez, V, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - A study of randomness, correlations, and collectivity in the nuclear shell model AB - A variable combination of realistic and random two-body interactions allows the study of collective properties [such as the energy spectra and B(E2) transition strengths] in Ti-44, Cr-48, and Mg-24. It is found that the average energies of the yrast band states maintain the ordering for any degree of randomness, but the B(E2) values lose their quadrupole collectivity when randomness dominates the Hamiltonian. The high probability of the yrast band to be ordered in the presence of pure random forces exhibits the strong correlations between the different members of the band MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000182032000020 L2 - SPECTRA SO - Physical Review C 2003 ;67(3): 9772 UI - 9489 AU - Veleva L AU - az-Ballote L AU - Wipf DO AD - Mississippi State Univ, Dept Chem, Mississippi State, MS 39762, USAVeleva, L, Res Ctr Adv Study, Dept Appl Phys, Unidad Merida, Merida 97310, Yucatan, Mexico TI - An in situ electrochemical study of electrodeposited nickel and nickel-yttrium oxide composite using scanning electrochemical microscopy AB - Electrodeposited nickel and nickel-yttrium oxide composite samples were studied in situ using scanning electrochemical microscopy (SECM). The monitored probe currents in phosphate-citrate buffer (pH 4.2) in the presence or absence of Ru(NH3)(6)(3+) as an oxidizing mediator near the Ni surface show that the SECM is a useful tool for studying the electrochemical activity of heterogeneous metal surfaces at micrometer scales. The SECM ultramicroelectrode probe tip provides information about the shape, activity, and location of particles, such as Y2O3 introduced (codeposited) in the Ni matrix of the composite. Experiments show that the Ni matrix in the composite coating is more active than the pure Ni coating. This fact is expected, because of texture changes in the Ni structure upon introduction (by codeposition) of Y2O3 particles. In the absence of a mediator in the solution, the electrochemical activity of heterogeneous metal surface at a microlevel is investigated by using O-2 concentration changes. The rate of reaction for O-2 reduction was found to vary locally at electrodes floating at the open-circuit potential (OCP) when compared to an electrode potentiostatically polarized at a more positive potential than the OCP. This behavior suggests that local anode and cathode regions are being observed at the OCP sample. (C) 2002 The Electrochemical Society MH - Mexico|Yucatan MH - USA PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 5 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000180069000027 L2 - MICROELECTRODE PROBE; DIFFUSION LAYER; CORROSION; TITANIUM; CODEPOSITION; BIOMATERIALS; INCLUSIONS; SILICON; GROWTH; FILMS SO - Journal of the Electrochemical Society 2003 ;150(1):C1-C6 9773 UI - 9064 AU - Velumani S AU - Mathew X AU - Sebastian PJ AU - Narayandass SK AU - Mangalaraj D AD - UNAM, Ctr Invest Energia, Solar Mat Dept, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoBharathiar Univ, Dept Phys, Coimbatore 641046, Tamil Nadu, IndiaVelumani, S, UNAM, Ctr Invest Energia, Solar Mat Dept, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Structural and optical properties of hot wall deposited CdSe thin films AB - Cadmium selenide (CdSe) films were prepared by hot wall deposition technique using optimized tube length under a vacuum of 6 mPa on to well-cleaned glass and ITO substrates. The X-ray diffraction analysis revealed that the films are polycrystalline in nature for lower thickness and at lower substrate temperatures, but with increasing thickness and increasing substrate temperature a more preferred orientation along (0 0 2) direction was observed. The crystallite size (D), dislocation density (delta) and strain (epsilon) were calculated. An analysis of optical measurements revealed a sharp absorption around 700 nm and a direct allowed transition. The band gap was found to be around 1.7 ev. The effect of thickness and substrate temperature on the fundamental optical parameters like band gap, refractive index and extinction coefficient are studied. (C) 2002 Elsevier Science B.V. All rights reserved MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000181118900013 L2 - thin film;CdSe;hot wall deposition;optical properties;structural properties;POLYCRYSTALLINE CDSE; LOW-TEMPERATURE; GAS-SENSOR; CADMIUM; CONSTANTS; THICKNESS; PERFORMANCE; ZNTE/CDSE SO - Solar Energy Materials and Solar Cells 2003 ;76(3):347-358 9774 UI - 9495 AU - Velumani S AU - Mathew X AU - Sebastian PJ AU - Narayandass SK AU - Mangalaraj D AD - UNAM, Ctr Invest Energia, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoBharathiar Univ, Dept Phys, Coimbatore 641046, Tamil Nadu, IndiaVelumani, S, UNAM, Ctr Invest Energia, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, Mexico TI - Thickness dependent properties of hot wall deposited CdSe films MH - India MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0261-8028 UR - ISI:000180000000008 L2 - SELENIDE THIN-FILMS; LASER-INDUCED DAMAGE; GAS-SENSOR; CONSTANTS SO - Journal of Materials Science Letters 2003 ;22(1):25-28 9775 UI - 7039 AU - Vencovsky R AU - Crossa J AD - Int Maize & Wheat Improvement Ctr CIMMYT, Biometr & Stat Unit, Mexico City, DF, MexicoUniv Sao Paulo, ESALQ, Dept Genet, BR-13400970 Sao Paulo, BrazilCrossa, J, Int Maize & Wheat Improvement Ctr CIMMYT, Biometr & Stat Unit, Apdo Postal 6-641, Mexico City, DF, Mexico TI - Measurements of representativeness used in genetic resources conservation and plant breeding AB - This paper reviews some measurements of representativeness such as the effective population size (N-e) useful in genetic resources conservation and plant breeding research. Some easy-to-use expressions for estimating Ne in a number of practical conditions are given. For the case of several subpopulations, N-e is scarcely influenced by the total inbreeding. Thus, N-e becomes mostly dependent on the allelic diversity among subpopulations and the number of subpopulations sampled. When, under natural conditions, levels of interpopulation allelic divergence are low, it is misleading to believe that a small number of subpopulations will be sufficient to attain adequate effective population sizes. When a single population is considered and seeds being sampled have a family structure, at the limit N-e depends only on the number of seed parents and the coancestry coefficient among sibs within families. Accession regeneration is the case where the reference population is of finite size. Gametic control is a major factor in regeneration. The loss of up to 20% of seeds may be recovered in terms of Ne when female gametic control is applied. This is not attainable with random sampling of seeds. When studying N-e in recurrent selection schemes, results showed that the gain in N-e through gametic control is very small when selection is intensive. When comparing effective population sizes for the single seed descent (SSD) method versus the bulk system, results showed that SSD maintains genetic drift at a low level and offers a much better protection against random loss of alleles during selling generations. Estimating population parameters, through codominant genetic markers is fundamental for obtaining reliable estimates of effective population size MH - Brazil MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Review AV - English IS - 0011-183X UR - ISI:000186477700002 L2 - EFFECTIVE POPULATION-SIZE; MIXED SELF; VARIANCE SO - Crop Science 2003 ;43(6):1912-1921 9776 UI - 7336 AU - Vera-Lastra O AU - Mendez C AU - Jara LJ AU - Cisneros M AU - Medina G AU - Ariza R AU - Espinoza LR AD - Hosp Especialidades Ctr Med La Raza, Ctr Med Nacl La Raza, Clin Res Unit, Dept Internal Med, Mexico City 02990, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Nacl La Raza, Dept Rheumatol, Mexico City 02990, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Nacl La Raza, Dept Epidemiol, Mexico City 02990, DF, MexicoGen Hosp Zona 76, Inst Mexicano Seguro Social, Mexico City, DF, MexicoLouisiana State Univ, Rheumatol Sect, New Orleans, LA, USAJara, LJ, Hosp Especialidades Ctr Med La Raza, Ctr Med Nacl La Raza, Clin Res Unit, Dept Internal Med, Seris & Zaachila S-N,Colonia La Raza, Mexico City 02990, DF, Mexico TI - Correlation of prolactin serum concentrations with clinical activity and remission in patients with systemic lupus erythematosus. Effect of conventional treatment AB - Objective. The role of prolactin (PRL) in the pathogenesis of systemic lupus erythematosus (SLE) is controversial. The effect of conventional treatment (steroids, antimalarials, immunosuppressor drugs) on PRL concentrations is unclear. We investigated correlation of PRL levels with lupus activity in patients at entry and after 6 months of conventional treatment. Methods. We studied 43 female patients with active SLE, who were divided in 2 groups; Group 1: 16 patients with minor organ involvement (cutaneous and articular involvement), and Group 2: 27 patients with major organ involvement (glomerulonephritis). Controls were 36 healthy individuals. PRL levels were determined by an immunoradiometric assay at entry and after 6 months of treatment. PRL levels were correlated with SLE Disease Activity Index (SLEDAI) score. Results. Mild hyperprolactinemia (HPRL, 20-40 ng/ml) was found in 30/43 (69.7%) SLE patients. After 6 months of treatment a reduction in PRL levels was found in both groups: Group 1: 24.3 +/- 10.8 to 16.96 +/- 10.87 ng/ml (p < 0.001); and Group 2: 23.6 +/- 5.7 to 12.07 +/- 11.13 ng/ml (p < 0.001). The SLEDAI score also decreased after treatment: Group 1: 16.5 +/- 5.9 to 2.1 +/- 1.3 (p < 0.001); Group 2: 16.8 +/- 5.4 to 1.6 +/- 1.4 (p < 0.001). At entry and after treatment, a significant correlation between PRL levels and SLEDAI score was found in all patients (r = 0.4946, p = 0.0007, and r = 0.9086, p = 0.0001, respectively). Conclusion. HPRL was associated with SLE disease activity. Conventional immunosuppressive therapy decreased PRL levels in direct correlation with decreased SLE activity. This finding emphasizes that PRL may play a role in the pathogenesis and clinical expression of SLE MH - Mexico|Distrito Federal MH - USA PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 11 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000185711700011 L2 - prolactin;systemic lupus erythematosus disease activity index;systemic lupus erythematosus activity;DISEASE-ACTIVITY; AUTOIMMUNE-DISEASE; HYPERPROLACTINEMIA; ASSOCIATION; SECRETION; AUTOANTIBODIES; BROMOCRIPTINE; LYMPHOCYTES; HORMONE; IMMUNE SO - Journal of Rheumatology 2003 ;30(10):2140-2146 9777 UI - 7005 AU - Verde-Gomez Y AU - onso-Nunez G AU - Cervantes F AU - Keer A AD - Ctr Invest Mat Avanzados SC, Chihuahua 31109, Chih, MexicoInst Technol Cancun, Quintanta Roo, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAKeer, A, Ctr Invest Mat Avanzados SC, Miguel Cervantes 120, Chihuahua 31109, Chih, Mexico TI - Aqueous solution reaction to synthesize ammonium hexachloroplatinate and its crystallographic and thermogravimetric characterization AB - Ammonium hexachloroplatinate (Pt(NH4)(2)Cl-6) has been proven to be a good precursor to obtain metallic Pt by thermal decomposition, in addition to being a stable compound easily obtained from a variety of Pt recuperation processes. This work was aimed to develop a simple way to synthesize Pt(NH4)(2)Cl-6. The crystallographic characterization by powder and single 2 crystal XRD is reported, along with a simulation of the XRD patterns performed with the software Cerius(2). A thermogravimetric analysis (TGA) allowed insight into the thermal decomposition process, which has been confirmed to take place in two steps, between 175 and 400 degreesC. This low decomposition temperature makes Pt(NH4)(2)Cl-6 an ideal catalyst precursor to obtain Pt/C for polymer electrolyte membrane fuel cell (PEMFC) electrode fabrication. (C) 2003 Elsevier Science B.V All rights reserved MH - Mexico|Chihuahua MH - Mexico|Quintana Roo MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000186412400009 L2 - catalysts;characterization methods;computer simulation;crystal structure;X-ray techniques;fuel cell materials;electrode materials;FUEL-CELLS; METAL COMPLEXES SO - Materials Letters 2003 ;57(30):4667-4672 9778 UI - 7580 AU - Verdeja LE AU - Gonzalez R AU - Alfonso A AU - Barbes MF AD - Univ Oviedo, Catedra Siderurgia, ETSIMO, Dept Ciencia Mat & Ingn Met, Oviedo 33004, SpainUniv Panamer, Escuela Ingn, Mexico City 03920, DF, MexicoVerdeja, LE, Univ Oviedo, Catedra Siderurgia, ETSIMO, Dept Ciencia Mat & Ingn Met, Independencia 13, Oviedo 33004, Spain TI - Nodal wear model: corrosion in carbon blast furnace hearths AB - Criterions developed for the Nodal Wear Model (NWM) were applied to estimate the shape of the corrosion profiles that a blast furnace hearth may acquire during its campaign. Taking into account design of the hearth, the boundary conditions, the characteristics of the refractory materials used and the operation conditions of the blast furnace, simulation of wear profiles with central well, Mushroom and elephant foot shape were accomplished. The foundations of the NWM are constructed considering that the corrosion of the refractory is a function of the temperature present at each point (node) of the liquid metal-refractory interface and the corresponding physical and chemical characteristics of the corrosive fluid MH - Mexico|Distrito Federal MH - Spain PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 4 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0034-8570 UR - ISI:000185011000004 L2 - chemical corrosion of materials;Nodal Wear Model (NWM);blast furnace hearth;wear simulation;tribology;CERAMIC SYSTEMS; DISSOLUTION SO - Revista de Metalurgia 2003 ;39(3):183-192 9779 UI - 8886 AU - Verdu M AU - Davila P AU - Garcia-Fayos P AU - Flores-Hernandez N AU - Valiente-Banuet A AD - UV, CSIC, GV, CIDE,Ctr Invest Sobre Desertificac, Valencia, SpainUniv Nacl Autonoma Mexico, FES Iztacala, Tlalnepantla 54090, Edo Mex, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoVerdu, M, UV, CSIC, GV, CIDE,Ctr Invest Sobre Desertificac, Apartado Oficial 46470 Albal, Valencia, Spain TI - 'Convergent' traits of mediterranean woody plants belong to pre-mediterranean lineages AB - The evergreen-sclerophyllous vegetation associated to the mediterranean-type ecosystems shares common characteristics that have been explained invoking an evolutionary convergence driven by the mediterranean climate. Mediterranean climate originated in the Quaternary but the plant 'convergent' characteristics are also present in tropical-like lineages that evolved along the Tertiary, before the mediterranean climate appeared. Because evergreen-sclerophyllous vegetation was broadly distributed across the world in the Tertiary, current trait similarities among the mediterranean taxa may be due to historical and phylogenetical constraints and not to evolutionary convergence. We tested historical and phylogenetical vs. convergence hypotheses to explain present ecological attributes found in woody plant species in mediterranean areas. Multivariate analyses were performed on the matrix of genera x life-history reproductive characteristics in three mediterranean-type ecosystems and a tropical system as an outgroup, the Mexical shrubland. These analyses indicate that character syndromes in mediterranean plants may largely be explained in relation to the age of the lineage (Tertiary vs. Quaternary). We also found that the similarities shown among mediterranean vegetations are due to Tertiary (pre-mediterranean-) and not to Quaternary (true mediterranean-) taxa. Furthermore, the similarities among mediterranean taxa are due to phylogenetical inertia because similarities in the character syndromes disappear when common genera are excluded from the analysis. (C) 2003 The Linnean Society of London MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 13 U4 - Evolutionary Biology U5 - J;Article AV - English IS - 0024-4066 UR - ISI:000181784300010 L2 - evolutionary convergence;historical effects;mediterranean climate;SOUTHERN SOUTH-AMERICA; VEGETATION; HISTORY; TERTIARY; CLIMATE; ECOSYSTEMS; REGIONS; FORESTS; FRUIT SO - Biological Journal of the Linnean Society 2003 ;78(3):415-427 9780 UI - 9339 AU - Vergara-Aragon P AU - Gonzalez CLR AU - Whishaw IQ AD - Univ Lethbridge, Canadian Ctr Behav Neurosci, Lethbridge, AB T1K 3M4, CanadaUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 07010, DF, MexicoWhishaw, IQ, Univ Lethbridge, Canadian Ctr Behav Neurosci, 4401 Univ Dr, Lethbridge, AB T1K 3M4, Canada TI - A novel skilled-reaching impairment in paw supination on the "good" side of the hemi-Parkinson rat improved with rehabilitation AB - Parkinson's disease is characterized by tremor, rigidity, bradykinesia, and postural abnormalities ascribed to the loss of nigrostriatal dopamine (DA). Symptoms similar to the human condition can be produced in the rat by DA-depleting 6-hydroxydopamine injections made into the nigrostriatal system. After a unilateral lesion, the rat symptoms include sensory and motor impairments and turning biases reflecting motor abnormalities to the contralateral-to-depletion side of the body. In addition, a number of studies on skilled reaching report impairments in the use of the ipsilateral limb. It is suggested that the ipsilateral deficit is secondary to the contralateral motor impairments however. Here we re-examine how rats with unilateral DA depletion use their ipsilateral limb for skilled reaching for food. We provide the first description of an impairment on the ipsilateral-to-depletion side of the body of the rat and the first demonstration of amelioration of the defect using behavioral therapy. Video analysis of rats reaching for single pellets of food with the ipsilateral limb revealed that, although limb advancement and food grasping were normal, paw supination and food release to the mouth were impaired. Consequently, the animals were unable to transport a grasped food pellet to the mouth. Behavioral therapy, consisting of training in a simpler reaching task, strikingly lessened the impairment and improved reaching movements to the point that the rats could transport the food to the mouth. The results are discussed in relation to possible causes of the ipsilateral impairment, its treatment, and to relevant research on human Parkinson patients, indicating that they display bilateral improvements after unilateral treatments MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 22 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000180523000024 L2 - dopamine depletion;dopamine and skilled movement;6-hydroxydopamine;nigrostriatal lesion;Parkinson analog rat;Parkinson's disease;Parkinson's disease rat model;skilled reaching;Parkinson's therapy;rehabilitation and Parkinson's disease;DRUG-INDUCED ROTATION; FORELIMB USE; LIMB-USE; COMPENSATORY ADJUSTMENTS; NIGROSTRIATAL LESIONS; DOPAMINERGIC GRAFTS; STRIATAL GRAFTS; STAIRCASE TEST; DEPLETED RATS; MOTOR CORTEX SO - Journal of Neuroscience 2003 ;23(2):579-586 9781 UI - 7975 AU - Vergara-Silva F AU - Espinosa-Matias S AU - Ambrose BA AU - Vazquez-Santana S AU - Martinez-Mena A AU - Marquez-Guzman J AU - Martinez E AU - Meyerowitz EM AU - varez-Buylla ER AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoCALTECH, Div Biol 156 29, Pasadena, CA 91125, USAAlvarez-Buylla, ER, Univ Nacl Autonoma Mexico, Inst Ecol, Ciudad Mexico, Mexico City 04510, DF, Mexico TI - Inside-out flowers characteristic of Lacandonia schismatica evolved at least before its divergence from a closely related taxon, Triuris brevistylis AB - Lacandonia schismatica, a mycoheterotrophic, hermaphroditic monocotyledon endemic to the Lacandon rain forest of southeast Mexico, is the only flowering plant for which a spatial inversion (heterotopy, complete homeosis) of the reproductive floral whorls (stamens and carpels) is known to occur in natural populations. In order to investigate if this autapomorphic inside-out arrangement of the reproductive organs is fixed in natural populations, we have undertaken extensive and intensive fieldwork spanning several years to locate new populations in addition to the type locality. In parallel, we have also searched for natural variation in floral organ arrangement in Triuris brevistylis, a closely related dioecious triurid that is found in nearby areas of the Lacandon forest. We have found that a small proportion of L. schismatica inflorescences bear unisexual flowers of both sexes, as well as bisexual flowers with differences in the number of reproductive organs. However, in all bisexual flowers, the stamens were always central and the carpels peripheral to them. More important, we have also found that a few T. brevistylis individuals have bisexual flowers with altered positions of stamens and carpels. Among these, flowers with an inside-out L. schismatica-like floral organ arrangement were observed. We document our findings with scanning electron micrographs, histological sections, and dissection microscope views. The information presented implies that the developmental-genetic mechanism putatively responsible for homeotic/heterotopic transformations involving floral reproductive organs in the two triurid species originated at least before these taxa diverged from each other. The Mexican triurids may be an example in which the molecular evolutionary events causally related to a major morphological change in plants can best be understood at the microevolutionary scale MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 1058-5893 UR - ISI:000184018200002 L2 - Triuridaceae;Lacandonia schismatica;floral variation;homeosis/heterotopy;ABC model;microevolution;MADS-BOX GENES; FLORAL DEVELOPMENT; BEGONIA CULTIVARS; HOMEOTIC GENES; EVOLUTION; HOMEOSIS; PLANTS; ARACEAE; BIOLOGY; ARABIDOPSIS SO - International Journal of Plant Sciences 2003 ;164(3):345-357 9782 UI - 6870 AU - Vergara CH AU - Schroder S AU - Almanza MT AU - Wittmann D AD - Univ Amer Puebla, Dept Quim & Biol, Puebla 72820, MexicoUniv Bonn, Inst Landwirtshaftliche Zool & Bienenkunde, D-53127 Bonn, GermanyUniv Mil Nueva Granada, Fac Ciencias Biol Aplicada, Bogota, ColombiaVergara, CH, Univ Amer Puebla, Dept Quim & Biol, Puebla 72820, Mexico TI - Suppression of ovarian development of Bombus terrestris workers by B-terrestris queens, Psithyrus vestalis and Psithyrus bohemicus females AB - Ovarian development was studied in workers of Bombus terrestris under four different treatments, which produced different levels of ovarian development. Psythirus females of both specific (P. vestalis) and non- specific (P. bohemicus, which is the specific parasite of B. lucorum) species were able to inhibit worker ovarian development and to reproduce in B. terrestris colonies. The effect of P. vestalis females on ovarian development of workers was statistically not different from the effect of B. terrestris queens ( positive control) and significantly different from ovarian development inhibition measured in groups of workers alone ( negative control). Ovarian development inhibition by P. bohemicus was not statistically different both from the positive and the negative control, indicating that this non- specific parasite is able to affect the ovarian development of workers, but not to the same extent as the queens of the same species or the females of the specific parasite MH - Colombia MH - Germany MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000186800700006 L2 - Bombus terrestris;Psithyrus spp.;cuckoo bumblebee;ovarian development;social parasitism;BUMBLE BEES; MANDIBULAR GLANDS; SEX-RATIOS; HYMENOPTERA; REPRODUCTION; DOMINANCE; COLONIES; APIDAE SO - Apidologie 2003 ;34(6):563-568 9783 UI - 6790 AU - Vergara R AU - Rick C AU - Hernandez-Lopez S AU - Laville JA AU - Guzman JN AU - Galarraga E AU - Surmeier DJ AU - Bargas J AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biophys, Mexico City 04510, DF, MexicoNorthwestern Univ, Feinberg Sch Med, Dept Physiol, Chicago, IL 60611, USABargas, J, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biophys, POB 70-253, Mexico City 04510, DF, Mexico TI - Spontaneous voltage oscillations in striatal projection neurons in a rat corticostriatal slice AB - In a rat corticostriatal slice, brief, suprathreshold, repetitive cortical stimulation evoked long-lasting plateau potentials in neostriatal neurons. Plateau potentials were often followed by spontaneous voltage transitions between two preferred membrane potentials. While the induction of plateau potentials was disrupted by non-NMDA and NMDA glutamate receptor antagonists, the maintenance of spontaneous voltage transitions was only blocked by NMDA receptor and L-type Ca2+ channel antagonists. The frequency and duration of depolarized events, resembling up-states described in vivo, were increased by NMDA and L-type Ca2+ channel agonists as well as by GABA(A) receptor and K+ channel antagonists. NMDA created a region of negative slope conductance and a positive slope crossing indicative of membrane bistability in the current-voltage relationship. NMDA-induced bistability was partially blocked by L-type Ca2+ channel antagonists. Although evoked by synaptic stimulation, plateau potentials and voltage oscillations could not be evoked by somatic current injection - suggesting a dendritic origin. These data show that NMDA and L-type Ca2+ conductances of spiny neurons are capable of rendering them bistable. This may help to support prolonged depolarizations and voltage oscillations under certain conditions MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 33 U4 - Physiology U5 - J;Article AV - English IS - 0022-3751 UR - ISI:000186990200016 L2 - MEDIUM SPINY NEURONS; MEMBRANE-POTENTIAL FLUCTUATIONS; NEOCORTICAL PYRAMIDAL NEURONS; DENDRITIC ACTION-POTENTIALS; EXCITATORY AMINO-ACIDS; MOTONEURONS IN-VIVO; NEOSTRIATAL NEURONS; CA2+ CHANNELS; SYNAPTIC TRANSMISSION; SYSTEMATIC VARIATIONS SO - Journal of Physiology-London 2003 ;553(1):169-182 9784 UI - 9121 AU - Verkhodanov OV AU - Verkhodanova NV AU - Andernach H AD - Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357169, Karachaevo Cher, RussiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoVerkhodanov, OV, Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357169, Karachaevo Cher, Russia TI - Radio identification and continuum spectra of decameter-wavelength sources AB - The paper describes a method for the radio identification of decameter-wavelength sources based on their continuum spectra and analysis of their coordinates in relatively large error boxes surrounding a specified position on the sky. The distribution of continuum spectra and identifications in other wavelength ranges are analyzed for the resulting radio catalog. Using identifications with the FIRST and NVSS Surveys, the statistics of the spectral index-size and spectral index-flux density distributions for steep-spectrum sources have been studied, and a catalog of ultrasteep-spectrum (alpha < -1.2) decameter-wavelength sources has been compiled. (C) 2003 MAIK "Nauka/Interperiodica" MH - Mexico|Guanajuato MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000181214200004 L2 - H-II REGIONS; NORTHERN SKY; DISCRETE SOURCES; SOURCE CATALOG; MHZ SURVEY; 6C SURVEY; GALAXIES; 52-DEGREES; 41-DEGREES; DATABASE SO - Astronomy Reports 2003 ;47(2):110-118 9785 UI - 9122 AU - Verkhodanov OV AU - Chavushyan VH AU - Mujica R AU - Trushkin SA AU - Valdes JR AD - Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, RussiaInst Nacl Astrofis Opt & Elect, Puebla, MexicoVerkhodanov, OV, Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 357147, Karachai Cherke, Russia TI - Objects from a cross-identification of the IRAS and low-frequency Texas radio catalogs AB - A cross-identification of objects in the low-frequency (365 MHz) Texas radio catalog and in WAS catalogs at four infrared wavelengths has yielded a list of 715 objects for further Studies. Objects with steep spectra for which the difference in the centers of gravity of the radio and infrared Sources was less than 3" were selected from this list. Seventeen of the objects have been observed at six wavelengths using the RATAN-600 radio telescope. Spectra of nine objects from the initial list for which there were candidate optical Counterparts were obtained using the 2.1-m telescope of the INAOE. The results of these observations are discussed. The presence of steep spectral indices for the radio sources is confirmed. The possible optical counterparts include interacting galaxies, an infrared galaxy, two emission-line galaxies, and a candidate BL Lac object. Optical images of the optical counterparts are presented together with radio and optical spectra. (C) 2003 MAlK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000181214200005 SO - Astronomy Reports 2003 ;47(2):119-128 9786 UI - 6879 AU - Veselkov AN AU - Evstigneev MP AU - Santiago AH AU - Rogova OV AU - Veselkov DA AU - Davies DB AD - Sevastopol Natl Tech Univ, Sevastopol, UkraineUniv Autonoma Puebla, Dept Math & Phys, Puebla 72570, MexicoUniv London Birkbeck Coll, Dept Chem, London, EnglandVeselkov, AN, Sevastopol Natl Tech Univ, Sevastopol, Ukraine TI - A H-1 NMR-spectroscopic study of equilibrium associates of ethidium homodimer in aqueous solutions AB - The self-association of a bifunctional intercalator (ethidium homodimer (EBH)) in an aqueous salt solution (0.1 mol/l NaCl) was studied using one- and two-dimensional H-1 NMR spectroscopies (500 MHz). A physical model of the equilibrium of the different associated homodimer forms in the solution was suggested. The most probable forms are open and folded conformations, dimers, and trimers. The chemical shifts for the protons of the EBH monomer and associates, as well as the equilibrium constants and thermodynamic parameters (enthalpy and entropy) of the self-association, were obtained from the concentration and temperature dependences of the apparent proton chemical shifts. A conclusion was made that the EBH dimers and trimers are stabilized by dispersion and hydrophobic interactions MH - United Kingdom MH - Mexico|Puebla MH - Ukraine PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0036-0244 UR - ISI:000186528600025 L2 - DNA BIFUNCTIONAL INTERCALATORS; PROTON MAGNETIC-RESONANCE; SELF-ASSOCIATION; BINDING; THERMODYNAMICS; COMPLEXATION; DERIVATIVES; DEOXYTETRANUCLEOTIDES; OLIGONUCLEOTIDES; HETERODIMER SO - Russian Journal of Physical Chemistry 2003 ;77(11):1855-1861 9787 UI - 8478 AU - Viani RM AU - Calderon JR AU - Van Pratt C AU - Lopez G AU - Spector SA AD - Univ Calif San Diego, Sch Med, Dept Pediat, Div Infect Dis, La Jolla, CA 92093, USATijuana Gen Hosp, Dept Pediat, Tijuana, MexicoTijuana Gen Hosp, Dept Obstet & Gynecol, Tijuana, MexicoViani, RM, Univ Calif San Diego, Sch Med, Dept Pediat, Div Infect Dis, La Jolla, CA 92093 USA TI - HIV prevalence during pregnancy in Tijuana, Baja California, Mexico MH - USA MH - Mexico|Baja California PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases;Virology U5 - J;Letter AV - English IS - 0269-9370 UR - ISI:000182834600033 SO - Aids 2003 ;17(7):1113-1114 9788 UI - 6744 AU - Vidal-Martinez VM AU - Poulin R AD - CORDEMEX, Ctr Res & Adv Studies, Natl Polytech Inst, Merida Unit, Merida 97310, Yucatan, MexicoUniv Otago, Dept Zool, Dunedin, New ZealandVidal-Martinez, VM, CORDEMEX, Ctr Res & Adv Studies, Natl Polytech Inst, Merida Unit, Antigua Carr Progreso Km 6, Merida 97310, Yucatan, Mexico TI - Spatial and temporal repeatability in parasite community structure of tropical fish hosts AB - An assessment is made of the repeatability of parasite community structure in space for a marine fish, and in space and time for a freshwater fish from south-eastern Mexico. The marine fish species was the red grouper, Epinephelus morio (collected from 9 localities), and the freshwater species was the cichlid, Cichlasoma urophthalmus (collected from 6 localities: including monthly at 2 localities for 1 year, and bimonthly at 1 locality in 1990 and 1999). Pairwise interspecific associations and analyses of nested patterns in the distributions of parasite species among hosts were used in both fish species, with comparisons over time made only with the cichlid. Positive interspecific associations, and nested patterns were noted in some localities for both fish species, and/or at some sampling times for the cichlid fish. However, nonrandom patterns in the structure of parasite communities in these 2 host species only were observed sporadically. When present, nestedness in both fish species was apparently linked with a positive association between total infection intensities and fish size. Additionally, adjacent localities were more likely to display similar parasite community structure than distant ones. This preliminary result suggests that distance between localities is an important determinant of predictability in parasite community structure MH - Mexico|Yucatan MH - New Zealand PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 16 U4 - Parasitology U5 - J;Article AV - English IS - 0031-1820 UR - ISI:000187030300010 L2 - nestedness;parasite community ecology;red grouper;cichlids;south-eastern Mexico;NESTED-SUBSET ANALYSES; HELMINTH COMMUNITIES; CICHLASOMA-UROPHTHALMUS; INTESTINAL HELMINTHS; ASSEMBLAGES; SIMILARITY; INTENSITY; MEXICO SO - Parasitology 2003 ;127():387-398 9789 UI - 7818 AU - Vidal-Quintanar RL AU - Love MH AU - Love JA AU - White PJ AU - Johnson LA AD - Iowa State Univ, Ctr Crops Utilizat Res, Dept Food Sci & Human Nutr, Ames, IA 50011, USAUniv Sonora, Dept Food Sci & Technol, Hermosillo 83000, Sonora, MexicoJohnson, LA, Iowa State Univ, Ctr Crops Utilizat Res, Dept Food Sci & Human Nutr, Rm 1041,Food Sci Bldg, Ames, IA 50011 USA TI - Lipid-autoxidation-limited shelf-life of nixtamalized instant corn masa AB - Consumers often report the presence of off-flavors and off-odors characteristic of lipid oxidation in commercial dry instant corn masa, but the extent of this problem is unknown. The lipid oxidation states of two common brands of nixtamalized instant corn masa produced in Mexico were evaluated during 23-weeks of storage at 15, 25, 35, 45, and 55C Lipid autoxidation was evaluated by determining peroxide values (P V) and conjugated dienoic acids (CD) of extracted lipids, and sensory analyses of flours and tortillas made from stored flours. Increased storage time significantly increased lipid oxidation (P < 0.001). Similarly, increased storage temperature significantly decreased the time to reach rancid flavor thresholds. The Q,0 values for flours and tortillas were 1.58 and 1.75, respectively. The shelf-lives of instant corn masa were 5.8 months when stored at 25C and only 2 months at 45C MH - USA MH - Mexico|Sonora PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1065-7258 UR - ISI:000184434700006 L2 - TORTILLA; SORGHUM SO - Journal of Food Lipids 2003 ;10(2):153-163 9790 UI - 8021 AU - Vidales AM AU - Ippolito I AU - Moukarzel C AD - Univ Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaUniv Nacl San Luis, CONICET, RA-5700 San Luis, ArgentinaUniv Rennes 1, Grp Mat Condensee & Mat, UMR CNRS 6626, F-35042 Rennes, FranceCINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoVidales, AM, Univ Nacl San Luis, Dept Fis, Chacabuco 917, RA-5700 San Luis, Argentina TI - Force-displacement distributions and percolation properties in simulated 2-D packings AB - The first part of this paper studies the behavior of contact force distributions and displacement distributions in isostatic 2-D arrays of polydispersed grains as a function of force strength and displacement strength, respectively. The array is built by pouring disks, one by one, into a rectangular die. After the array is ready, force and displacement measurements are performed on it. We also introduce a relaxation procedure (rearrangements of disks) in order to study the behavior of the corresponding distributions as a function of the number of relaxations performed on the system. In the second part, we characterize the percolation of small particles through this 2-D packings as a function of the polydispersivity of the disks. We analyze both trapping and non-trapping regimes. Characteristic features of these packings are discussed. (C) 2003 Elsevier Science B.V. All rights reserved MH - Argentina MH - France MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000183909400001 L2 - granular packings;percolation;stress distributions;FRICTIONLESS GRANULAR MATERIAL; INTER-PARTICLE PERCOLATION; STRESS TRANSMISSION; MODEL; SPHERES; COMPACTION; MECHANICS; COMPUTER; MEDIA; PILE SO - Physica A-Statistical Mechanics and Its Applications 2003 ;325(3-4):297-318 9791 UI - 9202 AU - Vidrio H AU - Fernandez G AU - Medina M AU - Alvarez E AU - Orallo F AD - Natl Autonomous Univ Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Fac Farm, Dept Farmacol, Santiago De Compostela, SpainVidrio, H, Natl Autonomous Univ Mexico, Fac Med, Dept Farmacol, Apartado Postal 70297, Mexico City 04510, DF, Mexico TI - Effects of hydrazine derivatives on vascular smooth muscle contractility, blood pressure and cGMP production in rats: comparison with hydralazine AB - Hydralazine is a hydrazine derivative used clinically as a vasodilator and antihypertensive agent. Despite numerous studies with the drug, its mechanism of action has remained unknown; guanylate cyclase activation and release of endothelial relaxing factors are thought to be involved in its vasodilator effect. Other hydrazine derivatives are known to stimulate guanylate cyclase and could therefore share the vasodilator activity of hydralazine, although such possibility has not been assessed systematically. In the present study, hydralazine, hydrazine, phenylhydrazine, and isomazid were evaluated for vascular smooth muscle relaxation in rat aortic rings with and without endothelium, as well as after incubation with the guanylate cyclase inhibitor methylene blue. They were also tested for enhancement of cyclic guanosine monophosphate (cGMP) production by cultured rat aortic smooth muscle cells and for hypotension in the anesthetized rat. All hydrazines relaxed aortic rings, an action unaffected by endothelium removal and, in all cases except hydralazine, antagonized by methylene blue. Only phenylhydrazine increased cGMP production and only hydralazine markedly lowered blood pressure. It was concluded that hydralazine vascular relaxation is independent of endothelium and is not related to guanylate cyclase activation. The other hydrazines studied also elicit endothelium-independent relaxation, but the effect is related to guanylate cyclase. The marked hypotensive effect of hydralazine contrasts with its modest relaxant activity and is not shared by the other hydrazines. The fact that hydrazine and isomazid produce methylene blue-sensitive relaxation, yet do not enhance cGMP production suggests the need for activating factors present in aortic rings but not in isolated cells. (C) 2002 Elsevier Science Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 12 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1537-1891 UR - ISI:000180852500003 L2 - hydralazine;hydrazines;cGMP;hypotension;rat aorta;SPONTANEOUSLY HYPERTENSIVE RATS; NITRIC-OXIDE SYNTHASE; CYCLIC-GMP LEVELS; GUANYLATE-CYCLASE; IN-VITRO; SODIUM NITROPRUSSIDE; GLYCERYL TRINITRATE; GUANOSINE 3',5'-MONOPHOSPHATE; ENDOTHELIAL DYSFUNCTION; METHYLENE-BLUE SO - Vascular Pharmacology 2003 ;40(1):13-21 9792 UI - 8063 AU - vila-Jimenez MM AU - Elizalde-Gonzalez MP AU - Geyer W AU - Mattusch J AU - Wennrich R AD - Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla 72571, MexicoUniv Autonoma Puebla, Fac Ciencias Quim, Puebla 72571, MexicoUFZ, Environm Res Ctr, Dept Analyt Chem, D-04318 Leipzig, GermanyElizalde-Gonzalez, MP, Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, POB J-55, Puebla 72571, Mexico TI - Adsorption of metal cations from aqueous solution onto a natural and a model biocomposite AB - Batch adsorption studies have shown that a solid material (CACMM) extracted from a cactus was able to sorb Cu2+, Cd2+, Cr3+ CrO42-, Fe3+, Ni2+,Pb2+ and Zn2+ from aqueous solutions in the concentration range 100 - 1000 mg l(-1). Fractions of CACMM with different particle diameter presented different sorption patterns upon the studied metal cations. Copper retention was much greater than that of other cations for all the fractions under identical experimental conditions with a maximum efficiency of 84% for 1000 mg l(-1) Cu2+ solutions. Adsorption magnitude onto large particles of CACMMI (450 (mum) decreased in the series Cu2+ > Ni2+ > Cr3+ > Pb2+ > Zn2+ > Cd2+ > Fe3+ that correlates with the stability constants of the respective oxalate complexes indicating that the interaction of the metal cations follows a surface adsorption-complexation mechanism. The composition of a model composite, which simulates the sorption capacity of the natural cactus powders upon copper, was found. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000183810100022 L2 - heavy metals;adsorption;biocomposite;model;water treatment;ADSORBENT CACMM2; INDUSTRY WASTE; REMOVAL; IONS; LEAD; SORPTION; WATER; CHROMIUM; CADMIUM; PEAT SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2003 ;219(1-3):243-252 9793 UI - 9071 AU - vila-Orta CA AU - Medellin-Rodriguez FJ AU - Wang ZG AU - Navarro-Rodriguez D AU - Hsiao BS AU - Yeh FJ AD - UASLP, Fac Ciencias Quim, Ctr Invest & Estudios Posgrado, San Luis Potosi 78210, MexicoCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoSUNY Stony Brook, Dept Chem, Stony Brook, NY 11794, USAMedellin-Rodriguez, FJ, UASLP, Fac Ciencias Quim, Ctr Invest & Estudios Posgrado, Dr Nava 6, San Luis Potosi 78210, Mexico TI - On the nature of multiple melting in poly(ethylene terephthalate) (PET) and its copolymers with cyclohexylene dimethylene terephthalate (PET/CT) AB - The multiple melting behavior of poly(ethylene terephthalate) (PET) homopolymers of different molecular weights and its cyclohexylene dimethylene (PET/CT) copolymers was studied by time-resolved simultaneous small-angle X-ray scattering/wide-angle X-ray scattering diffraction and differential scanning calorimetry techniques using a heating rate of 2 degreesC/min after isothermal crystallization at 200 degreesC for 30 min. The copolymer containing random incorporation of 1,4-cyclohexylene dimethylene terephthalate monomer cannot be cocrystallized with the ethylene terephthalate moiety. Isothermally crystallized samples were found to possess primary and secondary crystals. The statistical distribution of the primary crystals was found to be broad compared to that of the secondary crystals. During heating, the following mechanisms were assumed to explain the multiple melting behavior. The first endotherm is related to the non-reversing melting of very thin and defective secondary crystals formed during the late stages of crystallization. The second endotherm is associated with the melting of secondary crystals and partial melting of less stable primary crystals. The third endotherm is associated with the melting of the remaining stable primary crystals and the recrystallized crystals. Due to their large statistical distribution, the primary crystals melt in a broad temperature range, which includes both second and third melting endotherms. The amounts of secondary, primary and recrystallized crystals, being molten in each endotherm, are different in various PET samples, depending on variables such as isothermal crystallization temperature, time, molecular weight and co-monomer content. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Coahuila MH - Mexico|San Luis Potosi MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 14 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000181124600023 L2 - poly(ethylene terephthalate);copolymers;melting;SMALL-ANGLE SCATTERING; SEMI-CRYSTALLINE POLY(ETHYLENE-TEREPHTHALATE); LAMELLAR 2-PHASE SYSTEMS; X-RAY-SCATTERING; RANDOM COPOLYESTERS; BEHAVIOR; MORPHOLOGY; POLYMERS; PEEK SO - Polymer 2003 ;44(5):1527-1535 9794 UI - 9289 AU - vila-Pozos O AU - Movchan AB AD - Univ Autonoma Estado Hidalgo, Inst Ciencias Basicas & Ingn, Pachuca 42074, MexicoUniv Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, EnglandAvila-Pozos, O, Univ Autonoma Estado Hidalgo, Inst Ciencias Basicas & Ingn, Pachuca 42074, Mexico TI - Slow decay of end effects in layered structures with an imperfect interface AB - An asymptotic analysis of a layered structure with an imperfect interface subject to an anti-plane shear deformation and non-homogeneous Dirichlet end conditions is presented in this paper. Two layers of isotropic materials are bonded via a middle interface layer (adhesive joint), which is thin and soft; effectively, this can be described as a discontinuity surface for the displacement. Model fields are constructed to compensate for the error produced by the asymptotic solution for the case when the layered structure is subject to non-homogeneous Dirichlet end conditions. Numerical examples and analytical estimates are presented to illustrate the slow decay of the 'boundary-layer' fields MH - United Kingdom MH - Mexico|Hidalgo PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0022-0833 UR - ISI:000180653200004 L2 - asymptotic analysis;boundary layer;imperfect interface;ANTIPLANE SHEAR DEFORMATIONS; SANDWICH STRUCTURES; CONDUCTION; COMPOSITES SO - Journal of Engineering Mathematics 2003 ;45(2):155-168 9795 UI - 6947 AU - vila-Reese V AU - Colin P AU - Piccinelli G AU - Firmani C AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Escuela Nacl Estudios Profess Aragon, Ctr Tecnol, Mexico City 04510, DF, MexicoOsserv Astron Brera, I-23807 Merate, ItalyAvila-Reese, V, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - The effects of non-Gaussian initial conditions on the structure and substructure of cold dark matter halos AB - We study the structure and substructure of halos obtained in N-body simulations for a LambdaCDM cosmology with non-Gaussian initial conditions. The initial statistics are lognormal in the gravitational potential field with positive (LNp) and negative (LNn) skewness; the sign of the skewness is conserved by the density field, and the power spectrum is the same for all the simulations. Our aim is not to test a given non-Gaussian statistics but to explore the generic effect of positive- and negative-skew statistics on halo properties. From our low-resolution simulations, we find that LNp (LNn) halos are systematically more (less) concentrated than their Gaussian counterparts. This result is confirmed by our Milky Way - and cluster-sized halos resimulated with high resolution. In addition, they show inner density profiles that depend on the statistics: the innermost slopes of LNp (LNn) halos are steeper (shallower) than those obtained from the corresponding Gaussian halos. A subhalo population embedded in LNp halos is more susceptible to destruction than its counterpart inside Gaussian halos. On the other hand, subhalos in LNn halos tend to survive longer than subhalos in Gaussian halos. The spin parameter probability distribution of LNp (LNn) halos is skewed to smaller ( larger) values with respect to the Gaussian case. Our results show how the statistics of the primordial density field can influence some halo properties, opening the possibility of constraining, albeit indirectly, the primordial statistics at small scales MH - Italy MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000186688700004 L2 - dark matter;galaxies : formation;galaxies : halos;methods : n-body simulations;PRIMORDIAL NON-GAUSSIANITY; N-BODY SIMULATIONS; PROBE WMAP OBSERVATIONS; DENSITY PROFILES; COSMOLOGICAL SIMULATIONS; GRAVITATIONAL COLLAPSE; BACKGROUND-RADIATION; GALACTIC SATELLITES; GALAXY FORMATION; POWER SPECTRUM SO - Astrophysical Journal 2003 ;598(1):36-48 9796 UI - 7991 AU - Vila A AU - Pardo JM AU - Mosquera RA AD - Univ Vigo, Fac Ciencias, Dept Fis Aplicada, Orense 32004, Galicia, SpainInst Tecnol & Estudios Super Monterrery, Dept Ciencias Bas, Torreon 27250, Coahuila, MexicoUniv Vigo, Fac Ciencias, Dept Quim Fis, Vigo 36200, Galicia, SpainVila, A, Univ Vigo, Fac Ciencias, Dept Fis Aplicada, Campus Ourense, Orense 32004, Galicia, Spain TI - Theoretical binding enthalpies and topological analysis of complexes of linear and cyclic ethers with Li+, Na+ and K+ AB - The complexes formed by several linear unbranched and cyclic ethers with Li+, Na+ and K+ were analyzed with the AIM theory on B3LYP charge densities, that were able to reproduce the available experimental binding enthalpies. The analysis of the structures and AIM properties indicate that, in vacuum, these complexes are formed because of ion-dipole interactions and that no covalent bond is established between the cation and the molecule. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Coahuila MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000184086600010 L2 - BOND-DISSOCIATION ENERGIES; ELECTRON-DENSITY ANALYSIS; GAS-PHASE; ALKALI-METALS; AFFINITIES; MG2+; X=1-4; FORMALDEHYDE; MOLECULES; LITHIUM SO - Chemical Physics Letters 2003 ;375(5-6):499-505 9797 UI - 7731 AU - Vilchis JCA AU - Brogliato B AU - Dzul A AU - Lozano R AD - Univ Autonoma Estado Mexico, Fac Ingn, Toluca 50130, MexicoINRIA, F-38334 St Ismier, FranceUniv Technol Compiegne, CNRS, UMR 6599, HEUDIASYC, F-60205 Compiegne, FranceBrogliato, B, Univ Autonoma Estado Mexico, Fac Ingn, Toluca 50130, Mexico TI - Nonlinear modelling and control of helicopters AB - This paper presents the development of a nonlinear model and of a nonlinear control strategy for a VARIO scale model helicopter. Our global interest is a 7-DOF (degree-of-freedom) general model to be used for the autonomous forward-flight of helicopter drones. However, in this paper we focus on the particular case of a reduced-order model (3-DOF) representing the scale model helicopter mounted on an experimental platform. Both cases represent underactuated systems (u is an element of R-4 for the 7-DOF model and u is an element of R-2 for the 3-DOF model studied in this paper). The proposed nonlinear model possesses quite specific features which make its study an interesting challenge, even in the 3-DOF case. In particular aerodynamical forces result in input signals and matrices which significantly differ from what is usually considered in the literature on mechanical systems control. Numerical results and experiments on a scale model helicopter illustrate the theoretical developments, and robustness with respect to parameter uncertainties is studied. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Estado De Mexico PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000184655400007 L2 - nonlinear systems;nonlinear control;underactuated;helicopter;drone;aerodynamics SO - Automatica 2003 ;39(9):1583-1596 9798 UI - 6995 AU - Villa-Castorena M AU - Ulery AL AU - Catalan-Valencia EA AU - Remmenga MD AD - New Mexico State Univ, Dept Agron & Hort, Las Cruces, NM 88001, USACENID, RASPA, INIFAP, Cd Lerdo 35150, Dgo, MexicoNew Mexico State Univ, Ctr Stat, Las Cruces, NM 88001, USAUlery, AL, New Mexico State Univ, Dept Agron & Hort, MSC 3Q,POB 30003, Las Cruces, NM 88001 USA TI - Salinity and nitrogen rate effects on the growth and yield of chile pepper plants AB - Salinity and low soil N availability are important growth limiting factors for most plants. Our objective was to determine the influence of different N fertilization rates and soil salinity levels on the growth and yield of chile pepper plants (Capsicum annuum L.) grown in a greenhouse in sandy loam soil for 2 yr. The targeted soil salinity levels were 1.3, 3.5, and 5.5 dS m(-1) in 1999, and 1.3, 3.0, 4.5, and 6.0 dS m(-1) in 2000 as electrical conductivity of the saturated paste extract (ECe)Total N application rates were 80, 140, and 200 kg ha(-1) in 1999, and 30, 90, and 150 kg ha(-1) in 2000. Nitrogen rates of 140 kg ha(-1) or more increased soil salinities, in some cases by as much as 4 dS m Soil salinity decreased plant relative growth rate (RGR) up to first mature pod stage. After this growth stage however, salinity increased the RGR. Low and medium N rates produced the maximum RGR up to the first mature pod stage. After this growth stage, the maximum RGR was achieved with the medium and the high N rates tested in 1999 and 2000, respectively. Increasing N rates and salinity levels interacted to reduce chile pod yield in 1999, and acted independently in 2000. This study indicates that over-fertilization during early plant development may contribute to salinity and decreased pod yield. While salt-stressed chile performs well when adequately fertilized, N should be applied in amounts that increase with plant need over the growing season MH - Mexico|Durango MH - USA PB - MADISON: SOIL SCI SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Soil Science U5 - J;Article AV - English IS - 0361-5995 UR - ISI:000186450500018 L2 - SALT-STRESSED BARLEY; SODIUM-CHLORIDE; PHOTOSYNTHESIS; NUTRITION; RESPONSES; LEAVES SO - Soil Science Society of America Journal 2003 ;67(6):1781-1789 9799 UI - 7195 AU - Villacampa JI AU - Royo C AU - Romeo E AU - Montoya JA AU - Del Angel P AU - Monzon A AD - Univ Zaragoza, Fac Sci, Dept Environm Chem & Engn, Zaragoza, SpainInst Mexicano Petr, Mexico City 07730, DF, MexicoMonzon, A, Univ Zaragoza, Fac Sci, Dept Environm Chem & Engn, Zaragoza, Spain TI - Catalytic decomposition of methane over Ni-A1203 coprecipitated catalysts reaction and regeneration studies AB - The catalytic decomposition of methane over nickel catalysts is a potential alternative route to steam reforming or partial oxidation for the production of hydrogen from natural gas and other feedstocks. In the present paper, we report the results of characterization and catalytic behaviour of a Ni(30%)/Al2O3 catalyst during the catalytic decomposition of methane. The influence of the operating and reduction temperatures and feed composition on the methane conversion, hydrogen production and coking rate has been studied. The effects of the regeneration cycles with oxygen on activity and carbon formation are also investigated. It has been shown that H-2 inhibits both the carbon filament formation and the encapsulation of metallic particles by coke. An increase in the reaction temperature increases both the deactivation rate and the growth rate of filaments. However, at high reduction temperatures, there is a decrease in the number of filaments formed due to sintering of the Ni particles. A kinetic model has been developed for the prediction of H2 production and of carbon, taking into account both stages of carbon formation, nucleation and filament growth. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000186140800014 L2 - methane decomposition;hydrogen production;carbon filaments;Ni-Al2O3 catalysts;carbon growth mechanism;kinetic modelling;FEITKNECHT COMPOUND PRECURSOR; CARBON-FILAMENT GROWTH; HYDROGEN-PRODUCTION; NICKEL-CATALYSTS; SUPPORTED NICKEL; PRODUCE HYDROGEN; DIRECT CRACKING; FOSSIL-FUELS; NANOTUBES; KINETICS SO - Applied Catalysis A-General 2003 ;252(2):363-383 9800 UI - 6751 AU - Villalobos M AU - Trotz MA AU - Leckie JO AD - UNAM, Grupo Biogeoquim Ambiental, LAFQA, Inst Geografia,CU, Mexico City 04510, DF, MexicoStanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305, USAVillalobos, M, UNAM, Grupo Biogeoquim Ambiental, LAFQA, Inst Geografia,CU, Mexico City 04510, DF, Mexico TI - Variability in goethite surface site density: evidence from proton and carbonate sorption AB - Goethite is a representative iron oxide in natural environments due to its abundance and thermodynamic stability and may be responsible for many surface-mediated processes, including ion retention and mobility in aqueous settings. A large variability in morphologies and specific surface areas of goethite crystals exists but little work has been done to compare surface reactivity between them. The present work offers experimental evidence for the existence of an inverse relationship between sorption capacity for protons and carbonate ions and specific surface area of goethite for three synthetic goethite preparations spanning surface area differences by a factor of 2. An explanation for this was found by assuming a variable reactive site density between preparations in direct relationship to their sorption capacity based on congruency of carbonate sorption computed on a per-site basis. Previous evidence of maximum sorption capacities supports this explanation, and site density ratios between the goethites studied here were obtained. Triple layer surface complexation modeling was successful in describing adsorption data for all goethite preparations using equal stoichiometries. A new formulation of standard state for activities of surface species based on a 1.0 mole fraction of sites on the solid allowed transformation of the conventional molar concentration-based affinity constants to values based on site occupancy. in this fashion, by applying the appropriate site density ratios, a single set of affinity constant values was found that described accurately the adsorption data for all preparations. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000187019200001 L2 - goethite;site density;specific surface area;inner-layer capacitance;site occupancy;carbonate sorption;proton sorption;standard state;surface species;SOLUTION INTERFACE; ALPHA-FEOOH; COMPLEXATION MODELS; CRYSTAL MORPHOLOGY; WATER INTERFACE; MINERAL SURFACE; TITRATION DATA; ORGANIC-ACIDS; DOUBLE-LAYER; ADSORPTION SO - Journal of Colloid and Interface Science 2003 ;268(2):273-287 9801 UI - 7980 AU - Villalobos M AU - Toner B AU - Bargar J AU - Sposito G AD - Univ Calif Berkeley, Div Ecosyst Sci, Berkeley, CA 94720, USAStanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309, USAVillalobos, M, Natl Autonomous Univ Mexico, Inst Geog, Grp Biogeoquim Ambiental, LAFQA, Cicuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Characterization of the manganese oxide produced by Pseudomonas putida strain MnB1 AB - Manganese oxides form typically in natural aqueous environments via Mn(II) oxidation catalyzed by microorganisms, primarily bacteria, but little is known about the structure of the incipient solid-phase products. The Mn oxide produced by a Pseudomonas species representative of soils and freshwaters was characterized as to composition, average Mn oxidation number, and N-2 specific surface area. Electron microscopy, X-ray diffraction, and X-ray absorption near edge structure spectroscopy were applied to complement the physicochemical data with morphological and structural information. A series of synthetic Mn oxides also was analyzed by the same methods to gain better comparative understanding of the structure of the biogenic oxide. The latter was found to be a poorly crystalline layer type Mn(IV) oxide with hexagonal symmetry, significant negative structural charge arising from cation vacancies, and a relatively small number of randomly stacked octahedral sheets per particle. Its properties were comparable to those of delta-MnO2 (vernadite) and a poorly crystalline hexagonal birnessite ("acid birnessite") synthesized by reduction of permanganate with HCl, but they were very different from those of crystalline triclinic birnessite. Overall, the structure and composition of the Mn oxide produced by P. putida were similar to what has been reported for other freshly precipitated Mn oxides in natural weathering environments, yielding further support to the predominance of biological oxidation as the pathway for Mn oxide formation. Despite variations in the degree of sheet stacking and Mn(III) content, all poorly crystalline oxides studied showed hexagonal symmetry. Thus, there is a need to distinguish layer type Mn oxides with structures similar to those of natural birnessites from the synthetic triclinic variety. We propose designating the unit cell symmetry as an addition to the current nomenclature for these minerals. Copyright (C) 2003 Elsevier Science Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 45 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-7037 UR - ISI:000184126800012 L2 - RANDOM-STACKED BIRNESSITE; SYNTHETIC NA-BIRNESSITE; X-RAY-DIFFRACTION; HEXAGONAL BIRNESSITE; EXAFS SPECTROSCOPY; PINAL-CREEK; STRUCTURAL CHEMISTRY; SURFACE-CHEMISTRY; CR(III) OXIDATION; MINERAL FORMATION SO - Geochimica et Cosmochimica Acta 2003 ;67(14):2649-2662 9802 UI - 8706 AU - Villalon CM AU - Juan ERS AU - Sanchez-Lopez A AU - Bravo G AU - Willems EW AU - Saxena PR AU - Centurion D AD - IPN, CINVESTAV, Mexico City 14330, DF, MexicoUniv Rotterdam, Med Ctr, Erasmus MC, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsNatl Sch Biol Sci, Dept Physiol, Mexico City 11340, DF, MexicoVillalon, CM, IPN, CINVESTAV, Czda de los Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Pharmacological profile of the vascular responses to dopamine in the canine external carotid circulation AB - The present study investigated the effects of dopamine on the canine external carotid circulation. One min. intracarotid artery (i.c.) infusions of dopamine (10-310 mug min(-1)) produced dose-dependent decreases in the canine external carotid conductance without affecting blood pressure or heart rate. This effect was mimicked by the D-1/2-like receptor agonist apomorphine (1-310 mug min(-1)), but not by the D-2-like receptor agonist, bromocriptine (31-310 mug min(-1)). In contrast, fenoldopam (1-310 mug min(-1), intracarotid), a D-1-like receptor agonist, produced dose-dependent increases in external carotid conductance. The vasoconstrictor response to dopamine was abolished after intravenous administration of the antagonists, phentolamine (alpha(1/2); 2000 mug kg(-1)) or rauwolscine (alpha(2); 100 mug kg(-1)), but remained unaffected after prazosin (alpha(1); 100 mug kg(-1)) or haloperidol (D-2-like; 1000 mug kg(-1)). Interestingly, after phentolamine not only were the vasoconstrictor responses to dopamine abolished, but even a dose-dependent vasodilator component was unmasked. These vasodilator responses to dopamine remained unchanged after intravenous haloperidol or propranolol (1000 mug kg(-1) each). On the other hand, the vasodilator responses to fenoldopam, which remained unchanged after intravenous saline (0.1 ml kg(-1)), propranolol (1000 mug kg(-1)) or vagosympathectomy, were abolished by the D-1-like receptor antagonist, SCH-23390 (10 mug kg(-1)). Lastly, the responses to dopamine and fenoldopam were not significantly altered after intraperitoneal pretreatment with reserpine (5 mg kg(-1); -24 hr). The above results suggest that the canine external carotid vasoconstrictor responses to dopamine: (i) are mainly mediated by alpha(2)-adrenoceptors; and (ii) overshadow a vasodilator component, which involves vascular D-1-like receptors MH - Mexico|Distrito Federal MH - Netherlands PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0901-9928 UR - ISI:000182204200006 L2 - VAGOSYMPATHECTOMIZED DOGS; RECEPTORS; SUBTYPES; HEADACHE; ALPHA(1)-ADRENOCEPTOR; ALPHA(2)-ADRENOCEPTOR; VASOCONSTRICTION; MIGRAINE; RELEASE SO - Pharmacology & Toxicology 2003 ;92(4):165-172 9803 UI - 7464 AU - Villalpando S AU - Latulippe ME AU - Rosas G AU - Irurita MJ AU - Picciano MF AU - O'Connor DL AD - Univ Toronto, Dept Nutrit Sci, Toronto, ON M5G 1X8, CanadaInst Nacl Salud Publ, Basic Nutr Div, Cuernavaca, Morelos, MexicoPenn State Univ, Dept Nutr, University Pk, PA 16802, USAHosp Sick Children, Toronto, ON M5G 1X8, CanadaO'Connor, DL, Univ Toronto, Dept Nutrit Sci, 555 Univ Ave, Toronto, ON M5G 1X8, Canada TI - Milk folate but not milk iron concentrations may be inadequate for some infants in a rural farming community in San Mateo, Capulhuac, Mexico AB - Background: We were interested in identifying possible nutritional reasons for growth faltering among breastfed infants in the rural farming community of San Mateo, Capulhuac, Mexico (2800 in above sea level). Objective: We examined the prevalence of inadequate iron and folate status among lactating Otomi women and determined to what extent their iron and folate nutriture influenced the milk concentrations of these nutrients. Design: Lactating women (n = 71) provided blood and milk samples and dietary information at a mean (+/-SD) of 22 +/- 13 d postpartum. Blood indexes included hemoglobin, hematocrit, serum iron, total-iron-binding capacity, ferritin, transferrin receptor, mean cell volume, plasma folate, and erythrocyte folate. Results: Approximately 62% and 58% of the women had nutritional anemia defined as a hemoglobin concentration less than or equal to133 g/L and a hematocrit value of 41.0%, respectively. With the use of a 3-index iron assessment model, 2 of the 66 women whose iron status was assessed (3%) had iron-deficient erythropoiesis, and 24 (36%) had iron deficiency anemia. Among the 67 women whose folate status was assessed, 29 (43%) had a low plasma folate concentration, and 13 (19%) had a low blood folate concentration in conjunction with a low hemoglobin concentration. Milk iron content was unrelated to maternal iron status, and the milk provided more than adequate amounts of iron to the infants. In contrast, the infants' predicted folate intake was approximate to45 mug/d, or 70% of the current recommended intake. Conclusion: Milk folate concentrations in Otomi women are low and may not support optimal folate status in all breastfed infants MH - Canada MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 9 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000185403700017 L2 - iron status;folate status;lactation;milk folate;milk iron;iron-folate interaction;LACTATING WOMEN; FOLIC-ACID; DEFICIENCY; GROWTH; ALTITUDE; VITAMIN-B-12; PREGNANCY; PLASMA SO - American Journal of Clinical Nutrition 2003 ;78(4):782-789 9804 UI - 7504 AU - Villanueva VM AU - Nieto JA AU - Obregon O AD - Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Sonora, Ctr Invest Fis, Hermosillo, Sonora, MexicoUniv Cambridge, Ctr Math Sci, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, EnglandVillanueva, VM, Univ Michoacana, Inst Fis & Matemat, POB 2-82, Morelia 58040, Michoacan, Mexico TI - Non-minimal electromagnetic coupling for spin-3/2 fields AB - The problem of the electromagnetic coupling for spin-3/2 particles is discussed. Following supergravity and some previous researches in the field of classical supersymmetric particles, we found that the electromagnetic coupling must not obey a minimal coupling in the sense of coupling the electromagnetic potential, but some kind of an electromagnetic field strength MH - United Kingdom MH - Mexico|Michoacan MH - Mexico|Sonora PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0015-9018 UR - ISI:000185207900005 SO - Foundations of Physics 2003 ;33(5):735-740 9805 UI - 7919 AU - Villarreal AB AU - Aguirre LHS AU - Rojo MMT AU - Navarro ML AU - Romieu I AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoUniv Autonoma Chihuahua, Chihuahua, MexicoCtr Dis Control & Prevent, Panamerican Hlth Org, Washington, DC, USAVillarreal, AB, Inst Nacl Salud Publ, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Risk factors for asthma in school children from Ciudad Juarez, Chihuahua AB - Asthma and allergic rhinitis were analyzed in a random sample of school children (n = 6174) residing in Ciudad Juarez, Chihuahua, Mexico. The International Study of Asthma and Allergies in Childhood methodology was applied through a standardized questionnaire. The sample was obtained with a bietapic design. Cumulative prevalence of asthma and wheezing was 6.8% (95% CI 6.2, 7.4) and 20% (95% of CI 19.7, 21.8) respectively; the prevalence of rhinitis was 5.0% (95% CI 4.5, 5.6). Family history of asthma odds ratio (OR) 2.33 (95% CI 1.78-3.05), respiratory infection after birth (OR) 3.44 (95% CI 2.76-4.29), and exposure to environmental tobacco (OR) 1.35 (95% CI 1.06-1.68) were the strongest risk factors for asthma and allergic rhinitis. The multifactorial etiology of asthma and allergic rhinitis was confirmed, as well as the importance of early exposure to environmental factors MH - Mexico|Chihuahua MH - Mexico|Morelos MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 6 U4 - Allergy;Respiratory System U5 - J;Article AV - English IS - 0277-0903 UR - ISI:000184172300010 L2 - risk factors;asthma;wheezing;rhinitis;ISAAC;Juarez;Mexico;CHILDHOOD ASTHMA; MATERNAL SMOKING; PARENTAL SMOKING; ATOPIC DISEASES; LUNG-FUNCTION; PREVALENCE; ALLERGIES; SYMPTOMS; ISAAC; POLLUTION SO - Journal of Asthma 2003 ;40(4):413-423 9806 UI - 8379 AU - Villarreal GM AU - Ohlsson J AU - Cavazos H AU - Abrahamsson M AU - Mohamed JH AD - Univ Autonoma Nuevo Leon, Dept Ophthalmol, Monterrey, MexicoGothenburg Univ, Inst Clin Neurosci, Dept Ophthalmol, S-41124 Gothenburg, SwedenOhlsson, J, SU Molndal, Dept Ophthalmol, SE-43180 Molndal, Sweden TI - Prevalence of myopia among 12- to 13-year-old schoolchildren in Northern Mexico AB - Purpose. The aim of this article was to report the prevalence of refractive errors, mainly myopia, among 12- to 13-year-old children in a metropolitan setting in Mexico. Methods. A total of 1035 schoolchildren were examined in a field study in Monterrey, Mexico. The examination included best-corrected visual acuity and refraction during cycloplegia. A sample of the children was sent to a pediatric eye clinic and underwent cycloplegic refraction with an autorefractor. Results. We found a prevalence of myopia (greater than or equal to-0.5 D SE) of 44%, whereas bilateral myopia was present in 37% of the children. In the total sample, high myopia (greater than or equal to-5D) was found in 1.4%. The prevalence of myopia was significantly higher in girls. Only 20% of children with bilateral myopia used prescription glasses; 8% had prescribed glasses, but did not use them. Hyperopia (greater than or equal to+1 D) was present in 6.0% of the total population, and astigmatism (greater than or equal to-1.5 D) was present in 9.5%. Conclusions. The prevalence of myopia among 12- to 13-year-old children in Mexico is high. The majority of cases are low grade, and a large number of the myopic children do not have, or do not use, prescription glasses MH - Mexico|Nuevo Leon MH - Sweden PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Ophthalmology U5 - J;Article AV - English IS - 1040-5488 UR - ISI:000182985500005 L2 - refractive error;myopia;prevalence;child;adolescence;Mexico;epidemiology;eyeglasses;BILATERAL VISUAL IMPAIRMENT; CHILDREN; CYCLOPLEGIA SO - Optometry and Vision Science 2003 ;80(5):369-373 9807 UI - 7771 AU - Villarruel-Lopez A AU - Marquez-Gonzalez M AU - Garay-Martinez LE AU - Zepeda H AU - Castillo A AU - de la Garza LM AU - Murano EA AU - Torres-Vitela R AD - Univ Guadalajara, Lab Microbiol Sanitaria, Ctr Univ Ciencias Exactas & Ingn, Guadalajara 44430, Jalisco, MexicoInst Politecn Nacl, Dept Microbiol, Escuela Nacl Ciencias Biol, Mexico City, DF, MexicoTexas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USATorres-Vitela, R, Univ Guadalajara, Lab Microbiol Sanitaria, Ctr Univ Ciencias Exactas & Ingn, Marcelino Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Isolation of Arcobacter spp. from retail meats and cytotoxic effects of isolates against Vero cells AB - A survey of Arcobacter spp. was conducted over a 12-month period in Guadalajara, Mexico. A total of 135 samples (45 lean ground beef samples, 45 lean ground pork samples, and 45 chicken samples, including drumsticks, gizzards, and ground or chopped breast) were collected from local butcheries. The samples were enriched in Johnson-Murano enrichment medium and then streaked onto Johnson-Murano agar plates. Typical colonies were subjected to microscopic and biochemical identification followed by polymerase chain reaction confirmation of the genus Arcobacter. All isolates confirmed to be Arcobacter isolates were then inoculated into Eagle's minimum essential medium to determine their cytotoxicity against Vero cells. Arcobacter spp. were detected in 28.8, 51.1, and 40.0% of beef, pork, and chicken samples, respectively. From these samples, 101 isolates were confirmed to be Arcobacter spp. by polymerase chain reaction. Overall, the species most frequently identified was A. butzleri, followed by A. skirrowii. A. cryaerophilus was isolated only from pork meat. Ninety-five (95%) of the Arcobacter isolates produced a virulence mechanism against Vero cells, and 38 of them induced cell elongation, indicating enterotoxin production. Eighteen isolates produced the formation of vacuoles, and 39 produced both vacuolization and elongation. The vacuolization effect may be related to a vacuolizing toxin. The production of a vacuolizing toxin by Arcobacter spp. has not previously been reported. Results obtained in this study indicate that Arcobacter spp. may show cytotoxic effects other than the recognized enterotoxin production MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 9 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000184574500005 L2 - SP-NOV; BUTZLERI; CAMPYLOBACTER; BACTEREMIA; CRYAEROPHILUS; PREVALENCE; IDENTIFICATION; POULTRY; WATER; FOOD SO - Journal of Food Protection 2003 ;66(8):1374-1378 9808 UI - 8633 AU - Villasenor-Pineda L AU - Gomez M AU - Perez-Coutino MA AU - Vaufreydaz D AD - Inst Nacl Astrofis Opt & Elect, Mexico City, DF, Mexico. Univ Grenoble 1, IMAG, Lab CLIPS, F-38041 Grenoble, France TI - A corpus balancing method for language model construction AB - The language model is an important component of any speech recognition system. In this paper, we present a lexical enrichment methodology of corpora focused on the construction of statistical language models. This methodology considers, on one hand, the identification of the set of poor represented words of a given training corpus, and on the other hand, the enrichment of the given corpus by the repetitive inclusion of selected text fragments containing these words. The first part of the paper describes the formal details about this methodology; the second part presents some experiments and results that validate our method MH - France MH - Mexico|Puebla T3 - COMPUTATIONAL LINGUISTICS AND INTELLIGENT TEXT PROCESSINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBW58E AV - English IS - 0302-9743 UR - ISI:000182492300040 SO - 2003 ;():393-401 9809 UI - 7657 AU - Villasenor AB AU - Oloriz F AU - Gonzalez-Arreola C AD - Univ Nacl Autonoma Mexico, Inst Geol, Dept Palaeontol, Mexico City 04510, DF, MexicoUniv Granada, Fac Ciencias, Dept Estratigrafia & Paleontol, E-18071 Granada, SpainVillasenor, AB, Univ Nacl Autonoma Mexico, Inst Geol, Dept Palaeontol, Mexico City 04510, DF, Mexico TI - First record of the genus Simocosmoceras Spath, 1925, Ammonitina, in Mexico. Biostratigraphic and palaeobiogeographic interpretation AB - The occurrence of Simocosmoceras in Mexico is first reported from the Mazatepec area (Puebla) in East-central Mexico. Simocosmoceras pszczolkowskii apulcoensis n. subsp. shows closest morphological, resemblance with Simocosmoceras pszczolkowskii Myczynski registered in western Cuba (Myczynski 1989). Ecological adaptation to comparatively epeiric seas in eastern Mexico is interpreted to cause phenotypic deviation with respect to Simocosmoceras pszczolkowskii Myczynski reported from western Cuba. The lack of transient phenotypes between Mexican and Cuban Simocosmoceras is assumed to support the interpretation of Simocosmoceras pszczolkowskii apulcoensis n. subsp. as a geographic subspecies. The new subspecies is interpreted to indicate stratigraphic horizons within the Semiforme/Verruciferm Zone in the Mediterranean Tethys MH - Mexico|Distrito Federal MH - Spain PB - UPPSALA: SWEDISH SCIENCE PRESS RP - NOT IN FILE U3 - TC 2 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 1103-5897 UR - ISI:000184805100001 L2 - ammonites;Simocosmoceras;paleobiogeography;lower Tithonian;Upper Jurassic;Mexico SO - Gff 2003 ;125():49-56 9810 UI - 7886 AU - Villasenor R AU - Magdaleno M AU - Quintanar A AU - Gallardo JC AU - Lopez MT AU - Jurado R AU - Miranda A AU - Aguilar M AU - Melgarejo LA AU - Palmerin E AU - Vallejo CJ AU - Barchet WR AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoBattelle Mem Inst, Pacif NW Div, Richland, WA, USAVillasenor, R, Av Platanales 252-5 Col Nueva Santa Maria, Mexico City 02800, DF, Mexico TI - An air quality emission inventory of offshore operations for the exploration and production of petroleum by the Mexican oil industry AB - An air quality screening study was performed to assess the impacts of emissions from the offshore operations of the oil and gas exploration and production by Mexican industry in the Campeche Sound, which includes the states of Tabasco and Campeche in southeast Mexico. The major goal of this study was the compilation of an emission inventory (EI) for elevated, boom and ground level flares, processes, internal combustion engines and fugitive emissions. This inventory is so far the most comprehensive emission register that has ever been developed for the Mexican petroleum industry in this area. The El considered 174 offshore platforms, the compression station at Atasta, and the Maritime Ports at Dos Bocas and Cayo Areas. The offshore facilities identified as potential emitters in the area were the following: (1) trans-shipment stations, (2) a maritime floating port terminal, (3) drilling platforms, (4) crude oil recovering platforms, (5) crude oil production platforms, (6) linking platforms, (7) water injection platforms, (8) pumping platforms, (9) shelter platforms, (10) telecommunication platforms, (11) crude oil measurement platforms, and (12) flaring platforms. Crude oil storage tanks, helicopters and marine ship tankers were also considered to have an El accurate enough for air quality regulations and mesoscale modeling of atmospheric pollutants. Historical ambient data measure at two onshore petroleum facilities were analyzed to measure air quality impacts on nearby inhabited coastal areas, and a source-receptor relationship for flares at the Ixtoc marine complex was performed to investigate health-based standards for offshore workers. A preliminary air quality model simulation was performed to observe the transport and dispersion patterns Of SO2, which is the main pollutant emitted from the offshore platforms. The meteorological wind and temperature fields were generated with CALMET, a diagnostic meteorological model that used surface observations and upper air soundings from a 4-day field campaign conducted in February of 1999. The CALMET meteorological output and the generated El drove the transport and dispersion model, CALPUFF. Model results were compared with SO2 measurements taken from the monitoring network at Dos Bocas. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000184353300011 L2 - emission inventory;emission factors;marine platforms;Gulf of Mexico;air quality modeling SO - Atmospheric Environment 2003 ;37(26):3713-3729 9811 UI - 6628 AU - Villatoro J AU - Diez A AU - Cruz JL AU - Andres MV AD - Ctr Invest Opt AC, Opt Fibers Dept, Leon, MexicoUniv Valencia, Inst Ciencia Mat, E-46003 Valencia, SpainVillatoro, J, Ctr Invest Opt AC, Opt Fibers Dept, Leon, Mexico TI - In-line highly sensitive hydrogen sensor based on palladium-coated single-mode tapered fibers AB - We report a fiber-optic sensor for detecting low concentrations of hydrogen. The sensor is based on the absorption change of the evanescent fields in a Pd-coated, single-mode tapered fiber. We fabricated a collection of polarization-sensitive and polarization-insensitive devices and we studied the effect of the different parameters on the sensitivity of the device. We found that the sensor's response is wavelength dependent and it can be adjusted with the taper diameter. Dramatic transmission changes were observed when the sensors were exposed to hydrogen concentrations below 4%. We complement the experimental results with theoretical calculations of the attenuation constant of the fundamental fiber-mode MH - Mexico|Guanajuato MH - Spain PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Engineering, Electrical & Electronic;Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 1530-437X UR - ISI:000187435600026 L2 - GAS SO - Ieee Sensors Journal 2003 ;3(4):533-537 9812 UI - 6653 AU - Villaver E AU - Stanghellini L AU - Manchado A AU - Garcia-Segura G AU - Renzini A AD - Space Telescope Sci Inst, Baltimore, MD 21218, USA. Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22830, Baja California, Mexico. European So Observ, D-85748 Garching, Germany TI - The effects of transition time on the populations of post-AGB stars, and on the nebular evolution AB - We show how the different assumptions on the transition time (the time lag between the superwind quenching at the AGB and the illumination of the Planetary Nebula [PN]) reflect into very different theoretical outcomes, both in the characteristics of the stellar remnants, and in the evolution of the nebular shells. We use a Monte Carlo simulation of post-AGB stars with a set of assumptions on the transition time, to show the effect on the resulting location of the stars on the HR diagram, and on the derived core mass distributions. We have also performed numerical simulations of the PN formation process, and investigated the effects of the transition time on the resulting PN structure. We found that the transition time determines not only the size of the PN shell, but also its dynamical evolution. We show the important implications that the transition time has on the observable parameters during the PN stage MH - Germany MH - Mexico|Baja California MH - Spain MH - USA T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400039 SO - 2003 ;(209):133-134 9813 UI - 6654 AU - Villaver E AU - Manchado A AU - Garcia-Segura G AD - Space Telescope Sci Inst, Baltimore, MD 21218, USA. Inst Astrofis Canarias, San Cristobal la Laguna 38205, Tenerife, Spain. Univ Nacl Autonoma Mexico, Inst Astron, Ensenada 22830, Baja California, Mexico TI - The dynamical gas evolution of low-and intermediate-mass stars: PN formation AB - Planetary nebula (PN) formation is intimately linked to stellar evolution. The stellar wind during the AGB and post-AGB stages depends on the progenitor mass and determines, together with the radiation field of the star, the structure and evolution of PNe. We summarize the results of the PhD thesis of E. Villaver, where we combined the results of stellar evolution with a numerical code to study the PN formation process MH - Mexico|Baja California MH - Spain MH - USA T3 - PLANETARY NEBULAE: THEIR EVOLUTION AND ROLE IN THE UNIVERSEIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBY04E AV - English IS - 0074-1809 UR - ISI:000187344400048 SO - 2003 ;(209):155-156 9814 UI - 9189 AU - Villaver E AU - Garcia-Segura G AU - Manchado A AD - Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, SpainSpace Telescope Sci Inst, Baltimore, MD 21218, USAUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoCSIC, Madrid, SpainVillaver, E, Inst Astrofis Canarias, Via Lactea S-N, E-38200 San Cristobal la Laguna, Spain TI - Ram pressure stripping in planetary nebulae AB - We present two-dimensional numerical simulations of the evolution of a low-mass star moving supersonically through its surrounding interstellar medium (ISM). We show that the ejecta of a moving star with a systemic velocity of 20 km s(-1) will interact with the ISM and will form bow shock structures qualitatively similar to what is observed. We find that, owing to ram pressure stripping, most of the mass ejected during the asymptotic giant branch (AGB) phase is left downstream of the moving star. As a consequence, the formation of the planetary nebula is highly influenced, even at the low relative velocity of the star. The models are based on the predictions of stellar evolution calculations. Therefore, the density and velocity of the AGB and post-AGB winds are time dependent and give rise to the formation of shock regions inside the cavity formed by the previous winds. As a result, the stand-off distance is also time dependent and cannot be determined by simple analytical arguments MH - Mexico|Baja California MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000181046600013 L2 - hydrodynamics;ISM : jets and outflows;ISM : structure;planetary nebulae : general;stars : AGB and post-AGB;stars : winds, outflows;RADIATION MAGNETOHYDRODYNAMICS CODE; INTERMEDIATE-MASS STARS; 2 SPACE DIMENSIONS; INTERSTELLAR-MEDIUM; ASTROPHYSICAL FLOWS; GIANT BRANCH; EVOLUTION; ALGORITHMS; EXPANSION; REGIONS SO - Astrophysical Journal 2003 ;585(1):L49-L53 9815 UI - 9205 AU - Villecco MB AU - Catalan CAN AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estud Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Tucuman, Inst Quim Organ, Fac Bioquim Quim & Farm, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaJoseph-Nathan, P, Inst Politecn Nacl, Ctr Invest & Estud Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - First total synthesis of heterocurvistone AB - The sesquiterpene ketone (+/-)-heterocurvistone was synthesized in eight steps and 12% overall yield from known methyl R-(+)-3-(4-methyl-3-cyclohexen-1-yl)-3-butenoate, readily available from R-(+)-limonene. The key synthetic step is an oxymercuration-induced cyclization. (C) 2003 Published by Elsevier Science Ltd MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000180906000004 L2 - heterocurvistone;isoheterocurvistone;heterocurvistol;isoheterocurvistol;sesquicineole derivatives;synthesis;TERPENE DERIVATIVES; HYDROPEROXIDE; EPOXIDATIONS; ALCOHOLS SO - Tetrahedron 2003 ;59(7):959-963 9816 UI - 9366 AU - Villegas-Lelovsky L AU - de la Cruz GG AU - Gurevich YG AU - Volovichev IN AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoNatl Acad Sci Ukraine, Inst Radioelect, UA-310085 Kharkov, UkraineVillegas-Lelovsky, L, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Photoacoustic effect in semiconductors: Influence of field temperature on carrier diffusion and recombination AB - A quantitative derivation is presented for the heat transport in bipolar semiconductors taking into account the generation and heating of carriers on the surface of the sample due to an incident modulated laser beam, finite carrier diffusion, and recombination in the solid. The temperature distribution is calculated using appropriate boundary conditions according to the photoacoustic experimental conditions. In addition, special emphasis is made on the heat power density generated in the sample due to the recombination of the electron-hole pair and the effect of the inhomogeneous temperature distribution on the thermal generation rate of carriers in the photoacoustic signal. Finally, the effect of two temperatures associated with the quasiparticle (electrons and phonons) systems is considered in the finite electron-phonon energy interaction in the solid. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000180451900077 SO - Review of Scientific Instruments 2003 ;74(1):556-558 9817 UI - 7077 AU - Villegas A AU - Olayo R AU - Cervantes J AU - Pannell KH AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, Gto, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAVillegas, A, Univ Guanajuato, Fac Quim, Col Noria Alta SN Posgrado Quim, Guanajuato 36050, Gto, Mexico TI - Photoreaction of poly(ferrocenylmethylsilane-co-phenylmethylsilane) in solution AB - The photoreaction of [(FcMeSi)(PhMeSi)(n)](m) in solution, Fe = ferrocenyl = (eta(5)-C5H5)Fe(eta(5)-C5H4), is reported using a coupled gel permeation chromatography/light scattering system. The presence of the ferrocenyl substituent resulted in a significant retardation of the depolymerization process and the process has been monitored in terms of changes in the percent of initial mass, molecular weight, polydispersity and molecular conformation. The results indicate that photo-scission of silicon-silicon bonds occurred preferentially at the polymer chain termini. The results have been compared to those obtained from the photodegradation of poly(phenylmethylsilane) previously reported of approximately the same molecular weight. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000186346400026 L2 - polysilanes;GPC/LS;photobleaching;polydispersity;molecular conformation;poly(ferrocenylmethylsilane-co-phenylmethylsilane);POLYSILANES; POLYMERS SO - Journal of Organometallic Chemistry 2003 ;685(1-2):196-201 9818 UI - 9258 AU - Viniegra-Gonzalez G AU - Favela-Torres E AU - Aguilar CN AU - Romero-Gomez SD AU - az-Godinez G AU - Augur C AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoUniv Autonoma Coahuila, Food Res Dept, Saltillo, Coahuila, MexicoUniv Autonoma Tlaxcala, Area Biotecnol, Ctr Invest Ciencias Biol, Ixtacuixtla Tlaxcala, DF, Mexico, USA, IRD, Athens, GA 30602 USAViniegra-Gonzalez, G, Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Av Michoacan & Purisima, Mexico City 09340, DF, Mexico TI - Advantages of fungal enzyme production in solid state over liquid fermentation systems AB - The present paper attempts to explain why enzyme production in solid-state fermentation (SSF) is higher than in submerged fermentation (SmF). Recent work done in our laboratory [Biotechnol. Lett. 22 (2000) 1255; J. Ind. Microbiol. Biotechnol. 26 (5) (2001) 271; J. Ind. Microbiol. Biotechnol. 26 (5) (2001) 296] related to the production of invertase, pectinases and tarmases, by Aspergillus niger grown by SSF and SmF is reviewed. To do such a comparative study, logistic and Luedeking-Piret equations are used in order to estimate the values of the following coefficients: maximal specific growth rate (mum), maximal biomass level (X-M), enzyme/biomass yield (Y-P/X) and secondary rate of production, or breakdown (k). It is shown that enzyme productivity is proportional to group, mu(M) Y-P/X X-M, corrected by a function of v = k/Y-P/X mu(M). In all three cases of enzyme production studied, productivity using a SSF system was higher than in SmF Studies with invertase resulted in higher values of mu(M)X(M). Studies with pectinases resulted in higher values of YP/XXM. Studies with tannases resulted in higher Y-P/X and less negative values of k. Finally, a reaction-diffusion model is presented to try to explain such differences based on micrographic measurements of mycelial aggregates for each kind of fermentation system. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 36 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 1369-703X UR - ISI:000180950500009 L2 - solid state fermentation;filamentous fungi;submerged culture;enzyme production;proteolysis;ASPERGILLUS-NIGER SO - Biochemical Engineering Journal 2003 ;13(2-3):157-167 9819 UI - 9386 AU - Vinuesa P AU - Neumann-Silkow F AU - Pacios-Bras C AU - Spaink HP AU - Martinez-Romero E AU - Werner D AD - Univ Marburg, FB Biol, FG Zellbiol & Angew Bot, D-35032 Marburg, GermanyLeiden Univ, Inst Mol Plant Sci, NL-2333 AL Leiden, NetherlandsUNAM, Ctr Invest Fijac Nitrogeno, Programa Ecol Mol & Microbiana, Cuernavaca, Morelos, MexicoVinuesa, P, Univ Marburg, FB Biol, FG Zellbiol & Angew Bot, Karl von Frisch Str, D-35032 Marburg, Germany TI - Genetic analysis of a pH-regulated operon from Rhizobium tropici CIAT899 involved in acid tolerance and nodulation competitiveness AB - Rhizobium tropici CIAT899 is highly acid tolerant and a good competitor for Phaseolus vulgaris nodule occupancy at low pH values. Using Tn5 mutagenesis, we identified an operon required for acid tolerance and nodulation competitiveness. The insertion was mapped to the 5' end of atvA, encoding a product with high sequence identity to the agro-bacterial AcvB virulence protein. Complementation analyses indicated that atvA is an ortholog of acvB, both genes being required for acid tolerance. A Ser/Ala substitution in the LIPASE_SER motif of AtvA resulted in an acid sensitive Fix(+) but very poorly competing strain, demonstrating that Ser-313 is essential for AtvA function. atvA is the second gene in an operon that is transcriptionally upregulated by acid shock. The acid-responsive promoter was mapped to a 469-bp intergenic region located upstream of lpiA, the first gene in the operon. lpiA-like genes are found in several alpha, beta, and gamma Proteobacteria that interact with eukaryotic host cells, and they are predicted to encode membrane proteins related to the FmtC/MprF family from low G+C Firmicutes. The latter proteins are involved in resistance to cationic antimicrobial peptides. A nonpolar deletion in lpiA caused a sevenfold decrease in relative nodulation competitiveness MH - Germany MH - Mexico|Morelos MH - Netherlands PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0894-0282 UR - ISI:000180496900008 L2 - gusA;lipolytic enzymes;symbiosis;CHROMOSOMAL VIRULENCE GENE; LEGUMINOSARUM BV PHASEOLI; GRAM-NEGATIVE BACTERIA; AGROBACTERIUM-TUMEFACIENS; LEGUME SYMBIOSIS; ESCHERICHIA-COLI; VULGARIS; ETLI; MELILOTI; CLONING SO - Molecular Plant-Microbe Interactions 2003 ;16(2):159-168 9820 UI - 8585 AU - Viramontes D AU - Descroix L AD - Inst Rech Dev, Lab Etud Transferts Hydrol & Environm, LTHE, F-38041 Grenoble 9, FranceIMTA, Jiutepec, Morelos, MexicoDescroix, L, Inst Rech Dev, Lab Etud Transferts Hydrol & Environm, LTHE, BP 53, F-38041 Grenoble 9, France TI - Changes in the surface water hydrologic characteristics of an endoreic basin of northern Mexico from 1970 to 1998 AB - The western Sierra Madre is the main water-providing area of northern Mexico. However, most of this mountain range has suffered a progressive degradation of soils and vegetation due to overgrazing and deforestation, for four or five decades. The objective of this study is to determine the impacts of these changes on water balance and hydrodynamic basin behaviour. The hydrological data of two basins (the Sextin basin, 4660 km(2) and the Ramos basin, 7130 km(2)) of this area were analysed. Annual runoff coefficients have not changed. Therefore, other indices were used to determine changes in the streamflow regime: an index of irregularity of daily discharge; the separation of flood flow and base flow; the lag time of the watersheds; the baseflow recession index; the two-day recession index. Some changes were noticeable at the basin scale in the water balance of the catchments: the ratio of the flood runoff coefficient to the base runoff coefficient increased from the 1970s to the 1990s; the basin lag time decreased 2.1% in the Ramos basin and 6.1% in the Sextin basin; the two-day recession index and the baseflow recession index increased, reflecting a more rapid decrease of streamflow after the peak flow; the mean annual runoff coefficient and the irregularity as estimated by the index used here showed no significant evolution. The convergence of such observations confirms that dramatic changes in the evolution of water resources in the near future in this area are to be expected, if the current land use is not strongly modified. Water management and dam operation would also be seriously affected. Copyright (C) 2003 John Wiley Sons, Ltd MH - France MH - Mexico|Morelos PB - W SUSSEX: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 10 U4 - Water Resources U5 - J;Article AV - English IS - 0885-6087 UR - ISI:000182601000004 L2 - hydrograph separation;response time;base flow index;overgrazing;crusted soils;runoff;overland flow;western Sierra Madre;ANDES REGION; LAND-USE; RUNOFF; VEGETATION; YIELD; EROSION; STREAMFLOW; CATCHMENT; RAINFALL; IMPACT SO - Hydrological Processes 2003 ;17(7):1291-1306 9821 UI - 6460 AU - Viskin S AU - Sands A AU - Seltzer D AU - Chen E AU - Kistler PM AU - Chavez LR AU - Iturralde P AU - Kalman JM AD - Tel Aviv Sourasky Med Ctr, Tel Aviv, IsraelRoyal Childrens Hosp, Melbourne, Vic, AustraliaUniv Calif San Francisco, San Francisco, CA 94143, USARoyal Childrens Hosp, Melbourne, Vic, AustraliaInst Nacl Cardiol, Mexico City, DF, Mexico TI - Too many physicians cannot recognize a long QT when they see one MH - Australia MH - Israel MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000186360602022 SO - Circulation 2003 ;108(17):426-426 9822 UI - 6902 AU - Vizcaino A AU - Favela J AU - Piattini M AD - Univ Castilla La Mancha, Escuela Super Informat, E-13071 Ciudad Real, SpainCICESE, Ensenada, Baja California, MexicoVizcaino, A, Univ Castilla La Mancha, Escuela Super Informat, E-13071 Ciudad Real, Spain TI - A multi-agent system for knowledge management in software maintenance AB - Knowledge management has become an important topic as organisations wish to take advantage of the information that they produce and that can be brought to bear on present decisions. This work describes a system to manage the information and knowledge generated during the software maintenance process, which consumes a large part of the software lifecycle costs. The architecture of the system is formed from a set of agent communities, each community is in charge of managing a specific type of knowledge. The agents can learn from previous experience and share their knowledge with other agents, or communities MH - Mexico|Baja California MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000186518000058 L2 - muti-agent systems;knowledge management;software maintenance SO - Knowledge-Based Intelligent Information and Engineering Systems, Pt 1, Proceedings 2003 ;2773():415-421 9823 UI - 8228 AU - Vizcaino A AU - Favela J AU - Piattini M AU - Garcia F AD - Univ Castilla La Mancha, Escuela Super Informat, E-13071 Ciudad Real, SpainCICESE, Ensenada, Baja California, MexicoVizcaino, A, Univ Castilla La Mancha, Escuela Super Informat, Paseo Univ 4, E-13071 Ciudad Real, Spain TI - Supporting software maintenance in web repositories through a multi-agent system AB - Software Maintenance (SM) is a knowledge-intensive activity. A suitable management of this knowledge could decrease the high costs (economic and in effort) of software maintenance tasks. The challenge of managing this knowledge increases as the distributed development of software becomes more popular, and developers as well as knowledge are distributed worldwide. Increasingly web repositories are being used for the coordination of development tasks among software and maintenance engineers. Thus, an appropriate technical solution to this problem should be based on a web architecture and associated protocols. On the other hand, in order to work with all the concepts related to SM is advisable to establish different levels of abstraction, thus the complexity of the concepts, and their management, are simplified. This work presents a system that, by storing information in XMI documents, manages the data and metadata generated during SM, facilitating the work of SM engineers MH - Mexico|Baja California MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000183488800032 SO - Advances in Web Intelligence 2003 ;2663():307-317 9824 UI - 8525 AU - Vizeacoumar FJ AU - Torres-Guzman JC AU - Tam YYC AU - Aitchison JD AU - Rachubinski RA AD - Univ Alberta, Dept Cell Biol, Edmonton, AB T6G 2H7, CanadaUniv Guanajuato, Inst Invest Biol Expt, Guanajuato, MexicoInst Syst Biol, Seattle, WA 98103, USARachubinski, RA, Univ Alberta, Dept Cell Biol, Med Sci Bldg 5-14,, Edmonton, AB T6G 2H7, Canada TI - YHR150w and YDR479c encode peroxisomal integral membrane proteins involved in the regulation of peroxisome number, size, and distribution in Saccharomyces cerevisiae AB - The peroxin Pex24p of the yeast Yarrowia lipolytica exhibits high sequence similarity to two hypothetical proteins, Yhr150p and Ydr479p, encoded by the Saccharomyces cerevisiae genome. Like Y/Pex24p, both Yhr150p and Ydr479p have been shown to be integral to the peroxisomal membrane, but unlike Y/Pex24p, their levels of synthesis are not increased upon a shift of cells from glucose- to oleic acid-containing medium. Peroxisomes of cells deleted for either or both of the YHR150w and YDR479c genes are increased in number, exhibit extensive clustering, are smaller in area than peroxisomes of wild-type cells, and often exhibit membrane thickening between adjacent peroxisomes in a cluster. Peroxisomes isolated from cells deleted for both genes have a decreased buoyant density compared with peroxisomes isolated from wild-type cells and still exhibit clustering and peroxisomal membrane thickening. Overexpression of the genes PEX25 or VPS1, but not the gene PEX11, restored the wild-type phenotype to cells deleted for one or both of the YHR150w and YDR479c genes. Together, our data suggest a role for Yhr150p and Ydr479p, together with Pex25p andVps1p, in regulating peroxisome number, size, and distribution in S. cerevisiae. Because of their role in peroxisome dynamics, YHR150w and YDR479c have been designated as PEX28 and PEX29, respectively, and their encoded peroxins as Pex28p and Pex29p MH - Canada MH - Mexico|Guanajuato MH - USA PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 23 U4 - Cell Biology U5 - J;Article AV - English IS - 0021-9525 UR - ISI:000182624200011 L2 - biogenesis;peroxin;protein similarity;open reading frame;membrane fission;ACYL-COA OXIDASE; YEAST YARROWIA-LIPOLYTICA; NUCLEAR-PORE COMPLEX; TARGETING SIGNAL; 3-KETOACYL-COA THIOLASE; BIOGENESIS DISORDERS; ENDOPLASMIC-RETICULUM; CANDIDA-TROPICALIS; FIREFLY LUCIFERASE; IN-VIVO SO - Journal of Cell Biology 2003 ;161(2):321-332 9825 UI - 8274 AU - Volpe M AU - Zhu JR AU - Maxwell T AU - Rodriguez A AU - Gamboa R AU - Gomez-Fernandez P AU - Ortega-Gonzalez GS AU - Matadamas N AU - Rodriguez F AU - Dass B AU - Kyle C AU - Clarysse L AU - Bryce A AU - Moreno-Heredia E AU - Germano G AU - Gilles L AU - Smith RD AU - Sanderson JE AD - Univ Studi Roma La Sapienza, Cattedra Cardiol, Dipartimento Med Sperimentale & Patol, I-32400161 Rome, ItalyIRCCS Neuromed, Pozzilli, ItalyFudan Univ, Zhong Shan Hosp, Shanghai 200433, Peoples R ChinaHosp Nacl Alberto Sabogal, Lima, PeruClin San Felipe, Lima, PeruHosp Gen Jerez, Cadiz, SpainHosp Virgen Arrixaca, Murcia, SpainHosp Gen Acapulco, Acapulco, MexicoHosp Dr Victorino Santaella, Los Teques, VenezuelaClin Golf, Lima, PeruReina Sofia, Cordoba, SpainMerck Sharp & Dohme Europe Inc, Brussels, BelgiumMerck & Co Inc, Whitehouse Stn, NJ, USAPrince Wales Hosp, Hong Kong, Peoples R ChinaVolpe, M, Univ Studi Roma La Sapienza, Cattedra Cardiol, Dipartimento Med Sperimentale & Patol, VIale Regina Elena, I-32400161 Rome, Italy TI - Comparison of the blood pressure-lowering effects and tolerability of losartan- and amlodipine-based regimens in patients with isolated systolic hypertension AB - Background: Elevated systolic blood pressure is a more important risk factor for cardiovascular and renal disease than elevated diastolic blood pressure. Isolated systolic hypertension (ISH) is the predominant form of hypertension in the elderly Effects of angiotensin II on the vascular wall and endothelium may contribute to development of ISH. Objective: The primary objective of this study was to compare the effects on trough sitting systolic blood pressure (SiSBP) of a regimen of losartan, a selective angiotensin II-receptor antagonist, and an amlodipine-based regimen in patients with ISH. Methods: This multicenter, prospective, randomized, double-blind, parallel-group study consisted of a 4-week placebo phase and an 18-week active-treatment phase. The losartan-based regimen consisted of losartan 50 mg, increased as needed to losartan 50 mg/hydrochlorothiazide (HCTZ) 12.5 mg at week 6 and to losartan 100 mg/HCTZ 25 mg at week 12 to achieve a target SiSBP <140 mm Hg. The amlodipine-based regimen consisted of amlodipine 5 mg, increased as needed to amlodipine 10 mg at week 6 and to amlodipine 10 mg/HCTZ 25 mg at week 12. The primary efficacy measure was change in trough SiSBP from baseline to week 18. Information on the tolerability of study treatments was collected at each visit, including the investigator's and patients' observations of clinical adverse experiences (CAEs), laboratory adverse experiences, and responses to a symptom questionnaire. Results: Eight hundred fifty-seven patients (65.6% female) were randomized to treatment, 432 in the losartan group and 425 in the amlodipine group. Their mean age was 67.6 years, and they had a mean duration of hypertension of 6.7 years at baseline. The losartan and amlodipine groups (intent-to-treat population) had baseline mean SiSBP values of 171.2 and 171.9 mm Hg, respectively. At week 18 (the primary end point), the mean change from baseline in SiSBP was -27.4 mm Hg for 426 patients who received losartan and -28.1 mm Hg for 419 patients who received amlodipine (estimated least-square mean difference, 0.3 mm Hg; 95% Cl, -1.4 to 2.0), indicating that losartans effect on systolic blood pressure was noninferior to that of amlodipine. The proportion of patients who responded (SiSBP <140 mm Hg or a greater than or equal to20-mm Hg decrease in SiSBP from baseline) was comparable between groups (73.9% losartan, 75.4% amlodipine). The incidence of CAEs and drug-related CAEs was significantly greater in the amlodipine group (amlodipine, 79.8% and 43.8%, respectively; losartan, 67.8% and 25.5%; P less than or equal to 0.001). In addition, more patients in the amlodipine group discontinued therapy due to a drug-related CAE compared with patients in the losartan group (12.9% vs 4.4%, respectively; P less than or equal to 0.001). Lower-extremity edema was the most common drug-related CAE in the amlodipine group (24.0% amlodipine, 2.5% losartan; P less than or equal to 0.001); dizziness was the most common drug-related CAE in the losartan group (6.0% losartan, 4.0% amlodipine). Conclusions: In these patients with ISH, losartan and amlodipine produced comparable clinically relevant reductions in SiSBP; however, losartan was better tolerated, as evidenced by fewer CAEs and discontinuations compared with amlodipine. Losartan may be considered for the initial treatment of ISH. Copyright (C) 2003 Excerpta Medica, Inc MH - Belgium MH - Italy MH - Mexico|Guerrero MH - Peoples R China MH - Peru MH - Spain MH - USA MH - Venezuela PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 8 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0149-2918 UR - ISI:000183452700010 L2 - losartan;isolated systolic hypertension;angiotensin II-receptor antagonist;RECEPTOR ANTAGONIST LOSARTAN; END-POINT REDUCTION; ANTIHYPERTENSIVE EFFICACY; CARDIOVASCULAR MORBIDITY; ANGIOTENSIN; ATENOLOL; SAFETY; HYDROCHLOROTHIAZIDE; INTERVENTION; MORTALITY SO - Clinical Therapeutics 2003 ;25(5):1469-1489 9826 UI - 8409 AU - Vossenaar M AU - Anderson AS AU - Ocke MC AU - Valdes-Kamos R AU - Solomons NW AU - Mayorga E AD - Univ Dundee, Ninewells Hosp & Med Sch, Dundee DD1 9SY, ScotlandNatl Inst Publ Hlth & Environm RIVM, Bilthoven, NetherlandsUniv Nacl Autonoma Mexico, Sch Med, Publ Hlth Dept, Mexico City, DF, MexicoCsSSIAM, Guatemala City, Guatemala TI - Self-reported body weight and weight change history in relationship to cancer prevention guidelines - the 4-country study MH - Guatemala MH - Mexico|Distrito Federal MH - Netherlands MH - United Kingdom PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000181796901821 SO - Faseb Journal 2003 ;17(5):A1139-A1139 9827 UI - 7202 AU - Voyer AG AU - Smith KG AU - Festa-Bianchet M AD - Univ Sherbrooke, Dept Biol, Grp Rech Ecol Nutr & Energet, Sherbrooke, PQ J1K 2R1, CanadaFish & Wildlife Div, Edson, AB T7E 1T2, CanadaVoyer, AG, Univ Nacl Autonoma Mexico, Inst Ecol, Lab Conducta Anim, AP 70-275, Mexico City 04510, DF, Mexico TI - Dynamics of hunted and unhunted mountain goat Oreamnos americanus populations AB - Native populations of mountain goats Oreamnos americanus are sensitive to harvest. To assess the potential effects of limited hunting on population dynamics, we analysed long-term data obtained from aerial counts of 12 native mountain goat herds in Alberta, Canada, during 1973-2001. Seven herds were hunted until 1987 and five were not hunted. Despite a decrease in the number of permits issued, mountain goat numbers declined in most hunted herds between 1980 and 1983. Hunting was closed in 1987. Only three of seven herds increased after hunting was closed. Unhunted herds also showed substantial among-herd differences in population trends. Our results suggest that factors other than sport hunting contributed to the population decline. Future harvests should target adult males, but the adult sex ratio of one intensively studied population was heavily biased in favour of females. A herd of 100 goats may only sustain the harvest of 1-2 adult males per year MH - Canada MH - Mexico|Distrito Federal PB - RONDE: WILDLIFE BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Zoology U5 - J;Article AV - English IS - 0909-6396 UR - ISI:000185868800008 L2 - aerial surveys;Alberta;censusing;hunting;mountain goat;population dynamics;sex ratio;COMPENSATORY REPRODUCTION; LION PREDATION; BIGHORN SHEEP; AGE; RECRUITMENT; SURVIVAL; MONTANA SO - Wildlife Biology 2003 ;9(3):213-218 9828 UI - 7212 AU - Wagatsuma Y AU - Arifeen SE AU - Neufeld L AU - Persson LA AD - ICDDR B, Dhaka, BangladeshInst Publ Hlth, Mexico City, DF, Mexico TI - Low birth weight and first-trimester growth in rural Bangladesh population MH - Bangladesh MH - Mexico|Distrito Federal PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000183333800176 SO - Pediatric Research 2003 ;53(6):23A-23A 9829 UI - 7216 AU - Walker RH AU - Rasmussen A AU - Rudnicki D AU - Holmes SE AU - Alonso E AU - Matsuura T AU - Ashizawa T AU - vidoff-Feldman B AU - Margolis RL AD - CUNY Mt Sinai Sch Med, Dept Neurol, New York, NY 10029, USAVet Affairs Med Ctr, Dept Neurol, Bronx, NY, USAInst Nacl Neurol & Neurocirug, Dept Neurogenet & Mol Biol, Mexico City, DF, MexicoJohns Hopkins Univ, Sch Med, Dept Psychiat, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Program Cellular & Mol Med, Baltimore, MD 21205, USABaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USAUniv Texas, Med Branch, Dept Neurol, Galveston, TX 77550, USANassau Cty Med Ctr, E Meadow, NY 11554, USAWalker, RH, CUNY Mt Sinai Sch Med, Dept Neurol, Box 1137,1 Gustave L Levy Pl, New York, NY 10029 USA TI - Huntington's disease-like 2 can present as chorea-acanthocytosis AB - Three patients from a previously described family with autosomal dominant chorea-acanthocytosis were found to have the CTG trinucleotide repeat expansion mutation of the junctophilin-3 gene associated with Huntington's disease like 2 (HDL2). One of six previously identified patients with HDL2 had acanthocytosis on peripheral blood smear, suggesting that HDL2 should be considered in the differential of chorea-acanthocytosis MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 15 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0028-3878 UR - ISI:000185911400031 L2 - DISORDER; PROTEIN; GENE SO - Neurology 2003 ;61(7):1002-1004 9830 UI - 6263 AU - Wallace DJ AU - Cardiel MH AU - Tumlin JA AU - Furie R AU - Hura C AU - Strand V AU - Wang S AU - Yushmanova I AU - Heilbrunn KR AD - Wallace Rheumat Study Ctr, Los Angeles, CA, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoEmory Univ, Div Renal, Atlanta, GA 30322, USANo Shore Univ Hosp, Manhasset, NY, USASan Antonio Kidney Dis Ctr, Res Dept, San Antonio, TX, USAStanford Univ, Palo Alto, CA 94304, USALa Jolla Pharmaceut Co, San Diego, CA, USA TI - Safety results from a RCT of LJP 394 in SLE patients with a history of renal disease MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Urology & Nephrology U5 - J;Meeting Abstract AV - English IS - 1046-6673 UR - ISI:000186219102080 SO - Journal of the American Society of Nephrology 2003 ;14():449A-449A 9831 UI - 6962 AU - Wallace DJ AU - Cardiel MH AU - Tumlin JA AU - Furie RA AU - Hura C AU - Strand V AU - Wang SL AU - Yushmanova I AU - Heilbrunn KR AD - Wallace Rheumat Study Ctr, Los Angeles, CA, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoEmory Univ, Atlanta, GA 30322, USAN Shore Univ Hosp, Manhasset, NY, USASan Antonio Kidney Dis Ctr, San Antonio, TX, USAStanford Univ, Palo Alto, CA 94304, USALa Jolla Pharmaceut, San Diego, CA, USA TI - Safety results from a randomized controlled trial (RCT) of LJP 394 in systemic lupus erythematosus (SLE) patients with a history of renal disease MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000185432801546 SO - Arthritis and Rheumatism 2003 ;48(9):S583-S583 9832 UI - 6817 AU - Wang ET AU - Kan FL AU - Tan ZY AU - Toledo I AU - Chen WX AU - Martinez-Romero E AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Romero, Cuernavaca 62191, Morelos, MexicoInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City, DF, MexicoChina Agr Univ, Coll Biol Sci, Dept Microbiol, Beijing 100094, Peoples R ChinaS China Agr Univ, Coll Astron, Dept Mol Genet, Guangzhou 510642, Peoples R ChinaWang, ET, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Romero, Cuernavaca 62191, Morelos, Mexico TI - Diverse Mesorhizobium plurifarium populations native to Mexican soils AB - Forty-six Mesorhizobium strains associated with the leguminous plants Leucaena leucocephala and Sesbania herbacea in an uncultivated Mexican field were characterized using a polyphasic approach. The strains were identified as Mesorhizobium plurifarium based upon the close relationships with the reference strains for this species in PCR-based restriction fragment length polymorphism analyses, sequencing of 16S rRNA genes, multilocus enzyme electrophoresis, and DNA-DNA hybridization. Although the strains isolated from both plants formed the same group in multilocus enzyme electrophoresis and cross-nodulations were observed in the laboratory, different electrophoretic types were obtained from the two plants grown in natural soils, indicating the existence of a preferable association between the plants and the rhizobia. The M. plurifarium strains from Mexico and the reference strains from Africa and Brazil formed different phenotypic clusters in a numerical taxonomy. The Mexican strains did not grow at 37 degreesC and were sensitive to salty-alkaline conditions, while the reference strains from Africa and Brazil grew at 42 degreesC and were more resistant to salty-alkaline conditions. These results demonstrate that both the plants and environmental factors affected the evolution of rhizobia and that the Mexican strains had adapted to the neutral soils and the cool climate where they were isolated MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Peoples R China PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000187013900008 L2 - Mesorhizobium plurifarium;Leucaena;Sesbania;phylogeny;diversity;LEGUMINOSARUM BIOVAR PHASEOLI; NITROGEN-FIXING NODULES; CICER-ARIETINUM L; SP-NOV; GENETIC DIVERSITY; RHIZOBIUM-LEGUMINOSARUM; LEUCAENA-LEUCOCEPHALA; ENZYME POLYMORPHISM; ASTRAGALUS-SINICUS; SESBANIA-HERBACEA SO - Archives of Microbiology 2003 ;180(6):444-454 9833 UI - 9168 AU - Wang HG AU - Owen RD AU - Sanchez-Hernandez C AU - Romero-Almaraz MD AD - Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoWang, HG, Univ SW Louisiana, Lafayette, LA 70504, USA TI - Ecological characterization of bat species distributions in Michoacan, Mexico, using a geographic information system AB - Aim To investigate the relationship between chiropteran species distributions and four fundamental environmental factors-temperature, precipitation, soil and vegetation- and to construct a species richness prediction map based on the environmental factors. Location The state of Michoacan, Mexico. Methods Bat specimens collected during a 2-year project were combined with museum specimens to form a dataset of over 3200 entries pertaining to 71 species of bats. Coordinates of the collection localities were recorded with GPS receivers or determined from maps. ArcView GIS was used to characterize the distribution of the species relative to the four environmental factors by projecting coordinates of the collection sites onto digitized maps of those factors. Correspondence analysis (CA) was used to evaluate the relationship between species distributions and the environmental factors. Results The CA results indicated that the order of importance of these factors is (from highest to lowest): temperature, vegetation, precipitation and soil. A predicted distribution map was constructed for each species of bat, based on the result of the CA analysis, using correspondences of each species to climate, vegetation and precipitation. Soil types were excluded from the prediction model because soil type does not appear to carry high predictive value for bat species in Michocan. Distribution maps of the 71 bat species were then overlaid to generate a map of bat species richness for the state of Michoacan. Main conclusions Neither family membership nor feeding guild affiliation appear to play important roles in chiropteran species distributions in Michoacan. The bat species richness prediction map will be a useful tool for conservation works in the region MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0960-7447 UR - ISI:000180893200008 L2 - bats;conservation;correspondence analysis;environmental factor;GIS;Michoacan;species distribution;ELEVATIONAL GRADIENT; BIOLOGICAL DIVERSITY; ABUNDANCE; GIS; WILDLIFE; PATTERNS; MAMMALS; BIRDS; MANAGEMENT; COMMUNITY SO - Global Ecology and Biogeography 2003 ;12(1):65-85 9834 UI - 7565 AU - Wang JK AU - van Ginkel M AU - Podlich D AU - Ye GY AU - Trethowan R AU - Pfeiffer W AU - Delacy IH AU - Cooper M AU - Rajaram S AD - CIMMYT, Wheat Program, Mexico City 06600, DF, MexicoPioneer HiBred Int Inc, Johnston, IA 50131, USAUniv Queensland, Sch Land & Food Sci, Brisbane, Qld 4072, AustraliaWang, JK, CIMMYT, Wheat Program, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Comparison of two breeding strategies by computer simulation AB - Breeding strategies used by plant breeders are many and varied, making it difficult to compare efficiencies of different breeding strategies through field experimentation. The objective of this paper was to compare, through computer simulation, two widely used breeding strategies, the modified pedigree/bulk selection method (MODPED) and the selected bulk selection method (SELBLK), in CIMMYT's wheat breeding program. The genetic models developed accounted for epistasis, pleiotropy, and genotype X environment (GE) interaction. The simulation experiment comprised the same 1000 crosses, developed from 200 parents, for both breeding strategies. A total of 258 advanced lines remained following 10 generations of selection. The two strategies were each applied 500 times on 12 GE systems. Findings indicated that genetic gain from SELBLK was on average 3.9% higher than that from MODPED, and genetic gain adjusted by target genotypes from SELBLK was on average 3.3% higher than MODPED for a wide range of genetic models. A greater proportion of crosses were retained (25% more) by means of SELBLK compared with MODPED, and from F1 to F8, SELBLK required one third less land than MODPED and produced fewer families (40% of the number for MODPED). For the genetic models considered in our study, computer simulations showed that the SELBLK method resulted in slightly greater genetic gain and significant improvements in cost effectiveness MH - Australia MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000185174300026 L2 - QUANTITATIVE TRAITS; SELECTION; GENE; MODELS; WHEAT; CROPS SO - Crop Science 2003 ;43(5):1764-1773 9835 UI - 8514 AU - Wang LL AU - Gannavarapu A AU - Kozinetz CA AU - Levy ML AU - Lewis RA AU - Chintagumpala MM AU - Ruiz-Maldanado R AU - Contreras-Ruiz J AU - Cunniff C AU - Erickson RP AU - Lev D AU - Rogers M AU - Zackai EH AU - Plon SE AD - Baylor Coll Med, Texas Childrens Canc Ctr, Houston, TX 77030, USABaylor Coll Med, Dept Pediat, Houston, TX 77030, USABaylor Coll Med, Dept Dermatol, Houston, TX 77030, USABaylor Coll Med, Dept Ophthalmol, Houston, TX 77030, USABaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USANatl Autonomous Univ Mexico, Dept Dermatol, Mexico City, DF, MexicoHosp Gen Dr Manual Gea Gonzalez, Dept Dermatol, Mexico City, DF, MexicoUniv Arizona, Coll Med, Tucson, AZ, USAWolfson Med Ctr, Inst Med Genet, Holon, IsraelChildrens Hosp Westmead, Dept Dermatol, Westmead, NSW, AustraliaUniv Penn, Div Human Genet & Mol Biol, Philadelphia, PA 19104, USABaylor Coll Med, Dept Pediat, Houston, TX 77030, USABaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USAPlon, SE, Baylor Coll Med, Texas Childrens Canc Ctr, 6621 Fannin St,MC3-3320, Houston, TX 77030 USA TI - Association between osteosarcoma and deleterious mutations in the RECQL4 gene in Rothmund-Thomson syndrome AB - Background: Rothmund-Thomson syndrome (RTS) is an autosomal recessive disorder associated with an increased predisposition to osteosarcoma. Children with RTS typically present with a characteristic skin rash (poikiloderma), small stature, and skeletal dysplasias. Mutations in the RECQL4 gene, which encodes a RecQ DNA helicase, have been reported in a few RTS patients. We examined whether a predisposition to developing osteosarcoma among an international cohort of RTS patients was associated with a distinctive pattern of mutations in the RECQL4 gene. Methods: We obtained clinical information about and biologic samples from 33 RTS patients (age range = 1-30 years). Eleven patients were diagnosed with osteosarcoma. All 21 exons and 13 short introns of the RECQL4 gene were sequenced from the genomic DNA of all subjects. Kaplan-Meier survival analysis was used to estimate the incidence of osteosarcoma among patients with and without mutations predicted to produce a truncated RECQL4 protein. Results: Twenty-three RTS patients, including all 11 osteosarcoma patients, carried at least one of 19 truncating mutations in their RECQL4 genes. The incidence of osteosarcoma was 0.00 per year in truncating mutation-negative patients (100 person-years of observation) and 0.05 per year in truncating mutation-positive patients (230 person-years of observation) (P = .037; two-sided log-rank test). Conclusions: Mutations predicted to result in the loss of RECQL4 protein function occurred in approximately two-thirds of RTS patients and are associated with risk of osteosarcoma. Molecular diagnosis has the potential to identify those children with RTS who are at high risk of this cancer MH - Australia MH - Israel MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 38 U4 - Oncology U5 - J;Article AV - English IS - 0027-8874 UR - ISI:000182672800010 L2 - WERNER-SYNDROME; DNA-REPAIR; MECHANISM SO - Journal of the National Cancer Institute 2003 ;95(9):669-674 9836 UI - 7337 AU - Wang XY AU - Sebastian PJ AU - Smit MA AU - Yang HP AU - Gamboa SA AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoInst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoXiangtan Univ, Coll Chem, Hunan 411105, Peoples R ChinaWang, XY, UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Studies on the oxygen reduction catalyst for zinc-air battery electrode AB - In this paper, perovskite type La0.6Ca0.4CoO3 as a catalyst of oxygen reduction was prepared, and the structure and performance of the catalysts was examined by means of IR, X-ray diffraction (XRD), and thermogravimetric (TG). Mixed catalysts doped, some metal oxides were put also used. The cathodic polarization curves for oxygen reduction on various catalytic electrodes were measured by linear sweep voltammetry (LSV). A Zn-air battery was made with various catalysts for oxygen reduction, and the performance of the battery was measured with a BS-9300SM rechargeable battery charge/discharge device. The results showed that the perovskite type catalyst (La0.6Ca0.4CoO3) doped with metal oxide is an excellent catalyst for the zinc-air battery, and can effectively stimulate the reduction of oxygen and improve the properties of zinc-air batteries, such as discharge capacity, etc. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Electrochemistry;Energy & Fuels U5 - J;Article AV - English IS - 0378-7753 UR - ISI:000185563800041 L2 - perovskite catalyst;air-electrode;PEROVSKITE; EVOLUTION; ELECTROCATALYSIS; GEL SO - Journal of Power Sources 2003 ;124(1):278-284 9837 UI - 7585 AU - Wang Y AU - Martinez-Rios A AU - Po H AD - Lasersharp Corp, Hopkinton, MA 01748, USAMcMaster Univ, Dept Engn Phys, Hamilton, ON L8S 4L7, CanadaCtr Invest Opt AC, Leon 37000, Guanajuato, MexicoWang, Y, Lasersharp Corp, 86 South St, Hopkinton, MA 01748, USA TI - Analysis of a Q-switched ytterbium-doped double-clad fiber laser with simultaneous mode locking AB - The characteristics of a Q-switched ytterbiurn-doped double-clad (YDDC) fiber laser are presented. Due to the self-mode-locking effect in the Q-switching process, the Q-switched pulses split up. Their initiation and evolution are experimentally analyzed, and the mechanism is detailed. Based on the proposed mechanism, an effective model is developed to simulate this Q-switched YDDC fiber laser and to reconstruct simultaneously Q-switched and mode-locked pulses. The simulated results agree well with the experimental results. (C) 2003 Published by Elsevier B.V MH - Canada MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000185050700016 L2 - fiber laser;Q-switched;self-mode-locked;ytterbium-doped double-clad fiber;PULSE; NM SO - Optics Communications 2003 ;224(1-3):113-123 9838 UI - 6304 AU - Wang YX AU - Vazquez-Duhalt R AU - Pickard MA AD - Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, CanadaUNAM, Inst Bioctecnol, Cuernavaca 62250, Morelos, MexicoPickard, MA, Univ Alberta, Dept Biol Sci, CW 405 Biol Sci Bldg, Edmonton, AB T6G 2E9, Canada TI - Manganese-lignin peroxidase hybrid from Bjerkandera adusta oxidizes polycyclic aromatic hydrocarbons more actively in the absence of manganese AB - We studied polycyclic aromatic hydrocarbon (PAH) oxidation using whole cells and purified manganese-lignin peroxidase (MnLiP) from Bjerkandera adusta UAMH 8258. Although the metabolism of PAHs by B. adusta has been previously demonstrated, less than 5% mineralization of C-14-labelled PAHs occurred in this study over a 40-day period. Oxidation of PAHs was examined by a purified MnLiP hybrid isoenzyme in the presence and absence of manganous ions. The rate of PAH oxidation was decreased by the presence of Mn. The substrates were anthracene and its methyl derivatives, pyrene and benzo[a]pyrene, PAHs with ionization potentials of 7.43 eV or lower. The PAH metabolites of the Mn-independent reaction were identified as the corresponding quinones. The pH optimum of the Mn-independent oxidation was generally about 4, while for the Mn-dependent reaction it was 3. The kinetic constants for the Mn-independent oxidation of 2-methylanthracene at pH 4 were determined, and the values we obtained were a k(cat) of 145/min, K-M,K-app of 23.8 mmol/L for the aromatic substrate, and K-M,K-app of 0.2 mmol/L for hydrogen peroxide. This is the first report of PAH oxidation by a MnLiP hybrid isoenzyme from white rot fungi MH - Canada MH - Mexico|Morelos PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000188769100004 L2 - manganese peroxidase;polycyclic aromatics;oxidation;Bjerkandera adusta;WHITE-ROT FUNGI; PHANEROCHAETE-CHRYSOSPORIUM; PLEUROTUS-ERYNGII; DEGRADING BASIDIOMYCETE; MOLECULAR CHARACTERIZATION; CHEMICAL-MODIFICATION; NEMATOLOMA-FROWARDII; DEPENDENT PEROXIDASE; PHLEBIA-RADIATA; STRAIN BOS55 SO - Canadian Journal of Microbiology 2003 ;49(11):675-682 9839 UI - 6347 AU - Ward DH AU - Morton A AU - Tibbitts TL AU - Douglas DC AU - Carrera-Gonzalez E AD - US Forest Serv, Biol Sci Off, Alaska Sci Ctr, Anchorage, AK 99503, USADucks Unlimited Inc, Wetlands & Waterford Res Ctr, Memphis, TN 38120, USAUS Geol Survey, Biol Sci Off, Alaska Sci Ctr, Glacier Bay Field Stn,Juneau Off, Douglas, AK 99824, USADucks Unlimited Mexico, Nuevo Leon, MexicoWard, DH, US Forest Serv, Biol Sci Off, Alaska Sci Ctr, 1011 E Tudor Rd, Anchorage, AK 99503 USA TI - Long-term change in eelgrass distribution at Bahia San Quintin, Baja California, Mexico, using satellite imagery AB - Seagrasses are critically important components of many marine coastal and estuarine ecosystems, but are declining worldwide. Spatial change in distribution of eelgrass, Zostera marina L., was assessed at Bahia San Quintin, Baja California, Mexico, using a map to map comparison of data interpreted from a 1987 Satellite Pour I'Observation de la Terre multispectral satellite image and a 2000 Landsat Enhanced Thematic Mapping image. Eelgrass comprised 49% and 43% of the areal extent of the bay in 1987 and 2000, respectively. Spatial extent of eelgrass was 13% less (-321 ha) in 2000 than in 1987 with most losses occurring in subtidal areas. Over the 13-yr study period, there was a 34% loss of submerged eelgrass (-457 ha) and a 13% (+136 ha) gain of intertidal eelgrass. Within the two types of intertidal eelgrass, the patchy cover class (< 85% cover) expanded (+250 ha) and continuous cover class ( greater than or equal to 85% cover) declined (-114 ha). Most eelgrass losses were likely the result of sediment loading and turbidity caused by a single flooding event in winter of 1992-1993. Recent large-scale agricultural development of adjacent uplands may have exacerbated the effects of the flood. Oyster farming was not associated with any detectable losses in eelgrass; spatial extent, despite the increase in number of oyster racks from 57 to 484 over the study period MH - USA MH - Mexico|Nuevo Leon PB - LAWRENCE: ESTUARINE RES FEDERATION RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0160-8347 UR - ISI:000188745200014 L2 - SUBMERGED AQUATIC VEGETATION; ZOSTERA-MARINA; SEAGRASS MEADOWS; COASTAL LAGOONS; BAY; LIGHT; SURVIVAL; GROWTH; PHOTOSYNTHESIS; REDUCTION SO - Estuaries 2003 ;26(6):1529-1539 9840 UI - 7208 AU - Wassgren CR AU - Cordova JA AU - Zenit R AU - Karion A AD - Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUSN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817, USAWassgren, CR, Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907, USA TI - Dilute granular flow around an immersed cylinder AB - In this paper we investigate a two-dimensional dilute granular flow around an immersed cylinder using discrete element computer simulations. Simulation measurements of the drag force acting on the cylinder, F-d, are expressed in terms of a dimensionless drag coefficient, C-d=F-d/[1/2rhonu(infinity)U(infinity)(2)(D+d)], where rho is the upstream particle mass density, nu(infinity) is the upstream solid fraction, U-infinity is the upstream velocity, and (D+d) is the sum of the cylinder diameter, D, and surrounding particle diameter, d. The drag coefficient increases rapidly with decreasing Mach number for subsonic Mach numbers, but remains insensitive to Mach number for supersonic values. The drag coefficient is also a strong function of the flow Knudsen number, with the drag coefficient increasing with increasing Knudsen number and approaching an asymptotic value for very large Knudsen numbers. The drag coefficient decreases with decreasing normal coefficient of restitution and is relatively insensitive to the friction coefficient. Bow shock structures and expansion fans are also observed in the simulations and are compared to similar structures observed in compressible gas flows. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 16 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 1070-6631 UR - ISI:000185865700008 L2 - MATERIALS ROUND OBSTACLES; GRAVITY FLOW; ASSEMBLIES; INSERTS; SILO; WAVE SO - Physics of Fluids 2003 ;15(11):3318-3330 9841 UI - 8743 AU - Watson C AU - Araya E AU - Sewilo M AU - Churchwell E AU - Hofner P AU - Kurtz S AD - Univ Wisconsin, Dept Astron, Madison, WI 53716, USAUniv Puerto Rico, Dept Phys, San Juan, PR 00931, USACornell Univ, Arecibo Observ, NAIC, Arecibo, PR 00612, USAUNAM, Inst Astron, Mexico City 04510, DF, MexicoWatson, C, Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53716 USA TI - Resolution of distance ambiguities of inner galaxy massive star formation regions. I AB - Fifty-four ultracompact (UC) H II regions in the GLIMPSE survey region (\b\ < 1&DEG; and 30&DEG; < l < 70&DEG;) were observed in H2CO and H110α using the 305 m Arecibo telescope. By analyzing H2CO absorption against the UC H II region continuum emission, we resolve the distance ambiguity toward 44 sources. This determination is critical to measure global physical properties of UC H II regions (e.g., luminosity, size, mass) and properties of the Galaxy (e.g., spiral structure, abundance gradients). We find that the distribution of UC H II regions in this survey is consistent with a "local spur,'' the Perseus, Sagittarius, and Scutum arms as delineated by Taylor & Cordes. However, departures from model velocities produce distance uncertainties only slightly smaller than the proposed arm separations MH - USA MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000182159400023 L2 - Galaxy : disk;radio lines : general;stars : formation;H-I SO - Astrophysical Journal 2003 ;587(2):714-726 9842 UI - 8173 AU - Weber B AU - Hecht L AD - CICESE, Div Earth Sci, Ensenada 22860, Baja California, MexicoHumboldt Univ, Museum Naturkunde, Inst Mineral, D-10115 Berlin, GermanyWeber, B, POB 434843, San Diego, CA 92143, USA TI - Petrology and geochemistry of metaigneous rocks from a Grenvillian basement fragment in the Maya block: the Guichicovi complex, Oaxaca, southern Mexico AB - The Guichicovi complex is the southeasternmost exposure of Proterozoic granulites in Mexico and forms the basement at the western edge of the Maya block. Its Grenville-affinity is similar to other basement rocks in Mexico that comprise the Oaxaquia microcontinent. Several authors have interpreted Oaxaquia as a volcanic arc terrane formed similar to 1.2 Ga ago outboard the Grenville Province. This volcanic arc was intruded by igneous rocks of the anorthosite-mangerite-charnockite-granite suite (AMCG-suites) prior to collision during the Grenville orogeny and subsequent granulite facies metamorphism similar to 1.0 Ga ago. The Guichicovi complex consists of metasedimentary sequences and basic to acid metaigneous rocks. We analyzed major, trace, and rare earth elements of metaigneous rocks from the Guichicovi complex that comprise two major lithologic units: (1) the Zacatal unit composed of felsic granulites (charnockites) and orthogneisses, and (2) the Northern Guichicovi unit composed of anorthositic-tonalitic gneisses, mafic granulites (ferrodiorites), and amphibolites. These two major lithologic units can clearly be distinguished by their chemical compositions. Most of the analyzed rocks indicate a volcanic-arc tectonic environment, but there are exceptions with within-plate characteristics. The Zacatal unit may have formed by crustal anatexis within the Oaxaquia arc-terrane, partly in a within-plate environment. One of those granitic gneisses with within-plate characteristics has a 1.23 Ga protolith age, which indicates that either the Oaxaquia arc was formed earlier, or that protoliths of this granitic unit have an origin distinct to the Oaxaquia arc terrane. We consider different models to interpret the Northern Guichicovi unit. It cannot conclusively be explained by an anorthosite suite, although the ferrodiorites can. Partial melting of the lower crust at a volcanic-arc basement may have formed the anorthositic-tonalitic gneisses and ferrodioritic melts. (C) 2003 Elsevier Science B.V. All rights reserved MH - Germany MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0301-9268 UR - ISI:000183593600003 L2 - geochemistry;granulite;metaigneous;Grenville;Oaxaquia;Mexico;U-PB GEOCHRONOLOGY; MASSIF ANORTHOSITE; NORTH-AMERICA; MANTLE SOURCE; RICH ROCKS; NEW-YORK; PROVINCE; QUEBEC; AGES; ND SO - Precambrian Research 2003 ;124(1):41-67 9843 UI - 6632 AU - Weber M AU - Gonzalez S AD - Univ Durham, Sch Biol & Biom Sci, Ecol Grp, Durham DH1 3LE, EnglandECOSUR, El Colegio Frontera Sur, Campeche 24000, MexicoIIBCE, IUCN, SSC,Fac Ciencias, Dept Citogenet,Deer Specialist Grp, Montevideo 11600, UruguayWeber, M, Univ Durham, Sch Biol & Biom Sci, Ecol Grp, South Rd, Durham DH1 3LE, England TI - Latin American deer diversity and conservation: A review of status and distribution AB - We reviewed the scientific literature published from 1940 to 2002 on Latin American (Mexican and Central and South American) deer (Mammalia: Cervidae), focusing on conservation status and prediction of geographic distributions. The extant Latin American deer are the most diverse deer assemblage in the world (Cervinae: one genus, one species: Elk [Cervus elaphus]; Odocoilineae: six genera, 18 species: White-tailed deer [Odocoileus virginianus], mule deer [O. hemionus], marsh deer [Blastocerus dochotomus], pampas deer [Ozotoceros bezoarticus], huemul [Hippocamelus bisulcus], taruca [Hippocamelus antisensis], greater pudu [Pudu mephistophiles], lesser pudu [Pudu pudu], and six recognized species of brocket deer [Mazama americana, M. gouazoubira, M. nana, M. bricenni, M. chunyi, and M. rufina] as well as three recently proposed species [M. pandora, M. rondoni, and M. bororo]). Within this group, three genera (Odocoileus, Hippocamelus, and Blastocerus) have been well studied, whereas the genus Mazama, P. puda, P. mephistophiles, and H. antisensis have received little attention. The marsh deer, pampas deer, taruca, huemul, lesser pudu, and two Mazama species (Mazama nana and M. bororo) are the most endangered species. They are each listed as Convention International for the Trade of Endangered Species Appendix I and are considered by the International Union for Nature Conservation to be near threatened or endangered. We updated or created distribution maps for these species. Current research predominantly centres on easily available species (e.g., white-tailed deer in Mexico) or endangered species (e.g., marsh deer in Brazil). In contrast, the ecology and conservation status of the pudu, taruca, and Mazama sp. remain largely unknown MH - United Kingdom MH - Mexico|Campeche MH - Uruguay PB - ST FOY: UNIVERSITE LAVAL RP - NOT IN FILE U3 - TC 3 U4 - Ecology U5 - J;Article AV - English IS - 1195-6860 UR - ISI:000187465200006 L2 - conservation;deer;distribution;Latin America;neotropics;HUEMUL HIPPOCAMELUS-BISULCUS; WHITE-TAILED DEER; OZOTOCEROS-BEZOARTICUS CELER; PAMPAS DEER; HABITAT USE; BROWN BROCKET; MARSH DEER; BLASTOCERUS-DICHOTOMUS; SOCIAL-ORGANIZATION; PANTANAL WETLAND SO - Ecoscience 2003 ;10(4):443-454 9844 UI - 7917 AU - Wehncke EV AU - Hubbell SP AU - Foster RB AU - Dalling JW AD - Univ Nacl Autonoma Mexico, Lab Interac Planta Anim, Dept Ecol Evolut, Mexico City 04510, DF, MexicoSmithsonian Trop Res Inst, Balboa, PanamaUniv Georgia, Dept Bot, Athens, GA 30602, USAField Museum, Dept Bot, Chicago, IL 60605, USAUniv Illinois, Dept Plant Biol, Urbana, IL 61801, USAWehncke, EV, Univ Nacl Autonoma Mexico, Lab Interac Planta Anim, Dept Ecol Evolut, Apartado 70-275,Ciudad Univ,Circuito Rxterior, Mexico City 04510, DF, Mexico TI - Seed dispersal patterns produced by white-faced monkeys: implications for the dispersal limitation of neotropical tree species AB - 1 Primate frugivores are important seed dispersers for a large fraction of tree species in many tropical forests. The movement, diet preferences and defecation patterns produced by primates may therefore strongly influence seed dispersion patterns and seedling recruitment success. Here we examine the pattern of seed dispersal generated by white-faced monkeys (Cebus capucinus ) in relation to adult tree distribution in the 50-ha plot on Barro Colorado Island (BCI), Panama. 2 Diet breadth of Cebus was remarkably wide. Over four months they consumed fruits of 95 out of an estimated 240 species available. Seeds of 67 species passed intact through the gut and 28 were spat out. 3 Dispersal effectiveness of Cebus was also high. Two Cebus groups on average spent < 10 min feeding in individual trees, had large home ranges (> 150 ha), travelled 1-3 km day(-1) and defecated seeds in small clumps throughout the day. 4 Mean dispersal distance of ingested seeds was 216 m (range 20-844 m), with the highest probability of dispersal 100-200 m from the parent plant. For six of nine species studied, the distance between defecation sites and nearest conspecific adults of seeds in faeces was not significantly different from random expectations. 5 The scattered dispersal pattern produced by Cebus suggests that this species contributes relatively little to dispersal limitation (sensu Nathan & Muller-Landau 2000) compared to other dispersers in the community. Long-distance dispersal by Cebus resulted in substantial movement of seeds in and out of the 50 ha plot, and suggests that inverse modelling procedures to estimate dispersal functions from trap data may not adequately describe dispersal patterns generated by this primate MH - Mexico|Distrito Federal MH - Panama MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 23 U4 - Plant Sciences;Ecology U5 - J;Article AV - English IS - 0022-0477 UR - ISI:000184268300015 L2 - Cebus capucinus;dispersal effectiveness;primate dispersal;recruitment limitation;seed dispersal;TROPICAL RAIN-FOREST; BROWN CAPUCHIN MONKEYS; INDIVIDUAL SPATIAL CHOICE; CEBUS-APELLA; RECRUITMENT LIMITATION; FORAGING GROUPS; FRENCH-GUIANA; HOME-RANGE; DIVERSITY; CONSEQUENCES SO - Journal of Ecology 2003 ;91(4):677-685 9845 UI - 7345 AU - Wei GH AU - Tan ZY AU - Zhu ME AU - Wang ET AU - Han SZ AU - Chen WX AD - China Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R ChinaNW Sci & Technol Univ Agr & Forestry, Coll Resource & Environm Sci, Yangling Shaanxi 712100, Peoples R ChinaInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City, DF, MexicoChen, WX, China Agr Univ, Coll Biol Sci, Beijing 100094, Peoples R China TI - Characterization of rhizobla isolated from legume species within the genera Astragalus and Lespedeza grown in the Loess Plateau of China and description of Rhizobium loessense sp nov AB - Twenty-nine rhizobial isolates from root nodules of Astragalus and Lespedeza spp. growing in the Loess Plateau of China were characterized by numerical taxonomy, RFLP and sequencing of PCR-amplified 16S rRNA genes, measurement of DNA G + C content, DNA-DNA relatedness and cross-nodulation with selected legume species. Based on the results of numerical taxonomy, the isolates formed two clusters (11 and 2) with some single isolates at a similarity level of 82%. Cluster 1 contained six isolates from Astragalus and Lespedeza spp. Cluster 2 consisted of nine isolates from Astragalus spp. DNA relatedness was greater than 80% among isolates within cluster 2. Phylogenetic analysis based on 16S rRNA gene sequences showed that CCBAU 7190B(T), representing cluster 2, was closely related to Rhizobium galegae and Rhizobium huautlense. DNA-DNA relatedness between CCBAU 7190BT and reference strains of R. galegae, R. huautlense and other related species ranged from 0 to 48.6%. The cluster 2 isolates could also be differentiated phenotypically from related species. Based on these data, a novel species, Rhizobium loessense sp. nov., is proposed for cluster 2, with the type strain CCBAU 7190B(T) (= AS1.3401(T) = LMG 21975(T)) MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000185551100053 L2 - ALLORHIZOBIUM-UNDICOLA; NUMERICAL TAXONOMY; GENETIC DIVERSITY; ROOT-NODULES; SINORHIZOBIUM; BACTERIA; REGIONS; GENUS; IDENTIFICATION; TIANSHANENSE SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():1575-1583 9846 UI - 8713 AU - Weilbacher T AU - Suzuki K AU - Dubey AK AU - Wang X AU - Gudapaty S AU - Morozov I AU - Baker CS AU - Georgellis D AU - Babitzke P AU - Romeo T AD - Univ N Texas, Dept Mol Biol & Immunol, Ctr Hlth Sci, Ft Worth, TX 76107, USAEmory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322, USAPenn State Univ, Dept Biochem & Mol Biol, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Mexico City 04510, DF, MexicoRomeo, T, Univ N Texas, Dept Mol Biol & Immunol, Ctr Hlth Sci, Ft Worth, TX 76107 USA TI - A novel sRNA component of the carbon storage regulatory system of Escherichia coli AB - Small untranslated RNAs (sRNAs) perform a variety of important functions in bacteria. The 245 nucleotide sRNA of Escherichia coli , CsrC, was discovered using a genetic screen for factors that regulate glycogen biosynthesis. CsrC RNA binds multiple copies of CsrA, a protein that post-transcriptionally regulates central carbon flux, biofilm formation and motility in E. coli . CsrC antagonizes the regulatory effects of CsrA, presumably by sequestering this protein. The discovery of CsrC is intriguing, in that a similar sRNA, CsrB, performs essentially the same function. Both sRNAs possess similar imperfect repeat sequences (18 in CsrB, nine in CsrC), primarily localized in the loops of predicted hairpins, which may serve as CsrA binding elements. Transcription of csrC increases as the culture approaches the stationary phase of growth and is indirectly activated by CsrA via the response regulator UvrY. Because CsrB and CsrC antagonize CsrA activity and depend on CsrA for their synthesis, a csrB null mutation causes a modest compensatory increase in CsrC levels and vice versa. Homologues of csrC are apparent in several Enterobacteriaceae. The regulatory and evolutionary implications of these findings are discussed MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 55 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000182191700007 L2 - RNA-BINDING PROTEIN; GLYCOGEN BIOSYNTHESIS; GENE-EXPRESSION; COMPARATIVE GENOMICS; ATTENUATION PROTEIN; BACILLUS-SUBTILIS; MOLECULE CSRB; IDENTIFICATION; TRANSLATION; CLONING SO - Molecular Microbiology 2003 ;48(3):657-670 9847 UI - 9352 AU - Weinberg M AU - Waterman S AU - Lucas CA AU - Falcon VC AU - Morales PK AU - Lopez LA AU - Peter C AU - Gutierrez AE AU - Gonzalez ER AU - Flisser A AU - Bryar R AU - Valle EN AU - Rodriguez A AU - Hernandez GA AU - Rosales C AU - Ortiz JA AU - Lander M AU - Vilchis H AU - Rawlings J AU - Leal FL AU - Ortega L AU - Flagg E AU - Conyer RT AU - Cetron M AD - CDCP, Natl Ctr Infect Dis, Div Global Migrat & Quarantine, Atlanta, GA 30333, USASan Diego Cty Hlth & Human Serv, Agcy Publ Hlth Lab, San Diego, CA, USAInst Diagnost & Referencias Epidemiol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoInst Serv Salud Publ Baja Calif, Mexicali, Baja California, MexicoCalif Dept Hlth Serv, San Diego, CA, USAArizona Dept Hlth Serv, Tucson, AZ, USASecretaria Salud Mexico City, Mexico City, DF, MexicoSecretaria Salud Publ, Hermosillo, Sonora, MexicoServ Salud Chihuahua, Chihuahua, MexicoNew Mexico Dept Hlth, Santa Fe, NM, USABorder Epidemiol Ctr, Las Cruces, NM, USATexas Dept Hlth, Austin, TX 78756, USAServ Salud Tamaulipas, Tamaulipas, MexicoPan Amer Hlth Org, El Paso, TX, USAWeinberg, M, CDCP, Natl Ctr Infect Dis, Div Global Migrat & Quarantine, 1600 Clifton Rd,Mailstop E03, Atlanta, GA 30333 USA TI - The US-Mexico border infectious disease surveillance project: Establishing binational border surveillance AB - In 1997, the Centers for Disease Control and Prevention, the Mexican Secretariat of Health, and border health officials began the development of the Border Infectious Disease Surveillance (BIDS) project, a surveillance system for infectious diseases along the U.S.-Mexico border. During a 3-year period, a binational team implemented an active, sentinel surveillance system for hepatitis and febrile exanthems at 13 clinical sites. The network developed surveillance protocols, trained nine surveillance coordinators, established serologic testing at four Mexican border laboratories, and created agreements for data sharing and notification of selected diseases and outbreaks. BIDS facilitated investigations of dengue fever in Texas-Tamaulipas and measles in California-Baja California. BIDS demonstrates that a binational effort with local, state, and federal participation can create a regional surveillance system that crosses an international border. Reducing administrative, infrastructure, and political barriers to cross-border public health collaboration will enhance the effectiveness of disease prevention projects such as BIDS MH - USA MH - Mexico|Baja California MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - Mexico|Tamaulipas PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 12 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000180503300015 L2 - MURINE TYPHUS; SOUTH TEXAS; HEPATITIS-A; EPIDEMIOLOGY; BRUCELLOSIS; CALIFORNIA; COMMUNITY; CHILDREN; COUNTY SO - Emerging Infectious Diseases 2003 ;9(1):97-102 9848 UI - 8816 AU - Wennstrom A AU - Ericson L AU - Garcia-Guzman G AD - Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, SwedenUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoWennstrom, A, Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden TI - The concept of sexually transmitted diseases in plants: definition and applicability MH - Mexico|Distrito Federal MH - Sweden PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 4 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000181854900022 L2 - ANTHER-SMUT DISEASE; RUST INFECTION; SILENE-DIOICA; REPRODUCTION; POPULATIONS; PATTERNS; GROWTH; EPIDEMIOLOGY; ENDOPHYTES; GENOTYPES SO - Oikos 2003 ;100(2):397-402 9849 UI - 9964 AU - Wheeler G AU - Mendez-Vivar J AU - Fleming S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoMetropolitan Museum Art, Sherman Fairchild Ctr Objects Conservat, New York, NY 10028, USALucent Technol, Murray Hill, NJ 07974, USAMendez-Vivar, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, AP 55-534, Mexico City 09340, DF, Mexico TI - The use of modified Zr-nPropoxide in the consolidation of calcite: A preliminary study focused into the conservation of cultural heritage AB - The monomeric precursor Zr-npropoxide was modified using chelating agents. The resulting sols were used to compose a consolidant sol that included coupling agents selected based on previous studies done by ourselves, the hydrophobic agent trimethyl methoxysilane (TMS) and mesitylene as drying control chemical additive (DCCA). The sols were studied by Fourier Transform Infrared Spectroscopy (FTIR). In a later stage calcite powder was impregnated with the sols and studied by Diffuse Reflectance Infrared Spectroscopy (DRIFT). According to the DRIFT results new bands appeared, that indicate interactions between the coupling agents and calcite. The Kratky plots obtained from the sols indicate that in all cases fiber-like oligomeric structures were obtained, having a fractal dimension value 1.60 MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0928-0707 UR - ISI:000178789100229 L2 - calcite;consolidation;Zr-alkoxides;cultural heritage;DRIFT;GEL SO - Journal of Sol-Gel Science and Technology 2003 ;26(1-3):1233-1237 9850 UI - 8748 AU - White JW AU - Hoogenboom G AD - CIMMYT Int, Mexico City 06600, DF, MexicoUniv Georgia, Dept Biol & Agr Engn, Griffin, GA 30223, USAWhite, JW, CIMMYT Int, Apt Postal 6-641, Mexico City 06600, DF, Mexico TI - Gene-based approaches to crop simulation: Past experiences and future opportunities AB - Use of process-based models of plant growth and development is increasing in both basic and applied research. Advances in genomics suggest the possibility of using information on gene action to improve simulation models, particularly where differences among genotypes are of interest. This paper reviews issues related to incorporating gene action in crop models, starting with an introduction to basic concepts of functional genomics. We recognize six levels of genetic detail in modeling approaches. Modeling gene action through linear estimates of effects on model parameters (Level 4) has shown promise in the common bean (Phaseolus vulgars L.) model GeneGro. However, this approach requires extensive data on the genetic makeup of cultivars, and such data are still not routinely available. Software for simulating complex biochemical pathways offers the prospect of simulating processes such as photosynthesis or photoperiod control of flowering by considering interactions of regulators, gene-products, and other metabolites (Level 6), but such software applications may require an understanding of the reaction kinetics of large biomolecules existing at concentrations as low as one or two molecules per cell. Over the next decade, genetic information probably has the most to contribute in understanding temporal and tissue-level variation in the genetic control of specific processes and, for more applied modeling, in improving the representation of cultivar differences. Strategic decisions are needed on prioritization among species and traits to be modeled, as well as on how to improve collaboration with molecular biologists to better access and harness the data resulting from their research MH - Mexico|Distrito Federal MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 11 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000182261000006 L2 - QUANTITATIVE TRAIT LOCI; PLANT COLD-ACCLIMATION; FUNCTIONAL GENOMICS; NONSTRESS ENVIRONMENTS; GRAIN-YIELD; DNA MARKERS; ZEA-MAYS; MAIZE; STRESS; MODELS SO - Agronomy Journal 2003 ;95(1):52-64 9851 UI - 8785 AU - Whitehead JA AU - Timmermans MLE AU - Lawson WG AU - Bulgakov SN AU - Zatarain AM AU - Medina JFA AU - Salzig J AD - Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543, USAUniv Cambridge, Dept Appl Math & Theoret Phys, Inst Theoret Geophys, Cambridge CB3 9EW, EnglandMIT, Cambridge, MA 02139, USAUniv Guadalajara, Inst Astron & Meteorol, Guadalajara 44100, Jalisco, MexicoWhitehead, JA, Woods Hole Oceanog Inst, Dept Phys Oceanog, MS 21,360 Woods Hole Rd, Woods Hole, MA 02543 USA TI - Laboratory studies of thermally and/or salinity driven flows with partial mixing - 1. Stommel transitions and multiple flow states AB - [1] Laboratory studies with flows driven by both temperature and salinity differences illustrate the role of partial mixing in such flows. The results are compared to fundamental box model results. In the classic Stommel experiment, an experimental chamber is heated from below and exposed to a steady flux of salt water from above. The chamber is laterally connected to a reservoir of fresh isothermal water. This duplicates in part the well-known box models of deep ocean and estuarine circulation where both temperature and salinity determine the density in the chamber that drives a steady exchange flow between chamber and reservoir. Two locally stable modes of circulation are found within a well-known range of the temperature and salinity forcing: one mode is primarily temperature driven ( the T-mode) and one mode is primarily salinity driven ( the S-mode), with hysteresis and Stommel transitions between the two modes. New experiments with limited turbulent mixing and a narrow vertical slot in the sidewall between a laboratory test chamber and the reservoir produce a three-layer structure for the S-mode and a two-layer structure for the T-mode. Hysteresis and the Stommel transitions are considerably smaller than in the fully mixed box models. Results are consistent with the notion that the Arctic Ocean is presently in the layered S-mode MH - United Kingdom MH - USA MH - Mexico|Jalisco PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000181984700001 L2 - GREENLAND-SCOTLAND RIDGE; THERMOHALINE CIRCULATION; NORTH-ATLANTIC; OCEAN; WATER; MODEL; VARIABILITY; EXCHANGE; CHANNEL; SEAS SO - Journal of Geophysical Research-Oceans 2003 ;108(C2): 9852 UI - 7198 AU - Wiedenfeld H AU - ndrade-Cetto A AD - Univ Bonn, Inst Pharmazeut, D-53121 Bonn, GermanyUniv Autonoma Mexico, Fac Ciencias, Dept Biol, Mexico City, DF, MexicoWiedenfeld, H, Univ Bonn, Inst Pharmazeut, Immenberg 4, D-53121 Bonn, Germany TI - Pyrone glycosides from Acosmium panamense (Benth.) Yacovlev AB - Besides caffeic acid three pyrones have been isolated from aquous bark extracts from Acosmium panamense and their structures were determined using spectroscopical methods. Besides the already described desmethylyangonine its O-4'-mono as well as the di(1-6)glucoside are found the first time MH - Germany MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000185928600006 L2 - desmethylyangonine;desmethylyangonine-beta-D-glucoside;desmethylyangonine-beta-D-di(1-6)glucoside;ALKALOIDS SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2003 ;58(9-10):637-639 9853 UI - 7140 AU - Wiedenmann RN AU - Smith JW AU - Rodriguez-Del-Bosque LA AD - Illinois Nat Hist Survey, Ctr Econ Entomol, Champaign, IL 61820, USATexas A&M Univ, Dept Entomol, College Stn, TX 77843, USAINIFAP, Campo Expt Rio Bravo, Rio Bravo 88900, Tamaulipas, MexicoWiedenmann, RN, Illinois Nat Hist Survey, Ctr Econ Entomol, Champaign, IL 61820 USA TI - Host suitability of the New World stalkborer Diatraea considerata for three old world Cotesia parasitoids AB - Biological control of stalkboring Lepidoptera often has been successful when the braconid parasitoids in the genera Cotesia and Apanteles were the natural enemies of choice. Constraints in using these gregarious, koinobiont, endoparasitoids have included host suitability, especially as influenced by the host's immune response. The suitability of a novel host, the New World stalkborer Diatraea considerata (Lepidoptera: Pyralidae), for parasitization by three Old World braconids, Cotesia chilonis, C. flavipes and C. sesamiae (Hymenoptera: Braconidae), was compared to the suitability of another New World novel host, Diatraea saccharalis. D. considerata was less suitable for all three parasitoids than was D. saccharalis. The frequent occurrence of parasitized D. considerata larvae that did not yield parasitoids, or pupate within an appropriate time interval, suggested encapsulation of the parasitoid progeny, which was visible through the host cuticle. Given the suitability results, these three parasitoids would not be appropriate candidates for use against D. considerata. The results also have important implications for the narrow host range expressed by these parasitoids MH - USA MH - Mexico|Tamaulipas PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 1386-6141 UR - ISI:000186272500003 L2 - Braconidae;Cotesia chilonis;Cotesia flavipes;Cotesia sesamiae;Diatraea;host range;host suitability;Hymenoptera;Lepidoptera;novel association;parasitoid;Pyralidae;SACCHARALIS LEPIDOPTERA; FLAVIPES HYMENOPTERA; PYRALIDAE; BRACONIDAE; STEMBORERS; PARASITIZATION; MEXICO; TEXAS SO - Biocontrol 2003 ;48(6):659-669 9854 UI - 7699 AU - Wilcken B AU - Bamforth F AU - Li Z AU - Zhu H AU - Ritvanen A AU - Redlund M AU - Stoll C AU - Alembik Y AU - Dott B AU - Czeizel AE AU - Gelman-Kohan Z AU - Scarano G AU - Bianca S AU - Ettore G AU - Tenconi R AU - Bellato S AU - Scala I AU - Mutchinick OM AU - Lopez MA AU - De Walle H AU - Hofstra R AU - Joutchenko L AU - Kavteladze L AU - Bermejo E AU - Martinez-Frias ML AU - Gallagher M AU - Erickson JD AU - Vollset SE AU - Mastroiacovo P AU - Andria G AU - Botto LD AD - Childrens Hosp Westmead, Sydney, NSW, AustraliaUniv Alberta, Edmonton, AB, CanadaPeking Univ, Natl Ctr Maternal & Infant Hlth, Beijing 100871, Peoples R ChinaNatl Res & Dev Ctr Welf & Hlth, STAKES, Helsinki, FinlandUniv Helsinki, Cent Hosp, Dept Paediat, FIN-00014 Helsinki, FinlandUniv Strasbourg, Strasbourg, FranceFdn Community Control Hereditary Dis, Budapest, HungaryKaplan Med Ctr, Rehovot, IsraelAO G Rummo, Div Med Genet, Benevento, ItalyBirth Defects Registry, Campania, ItalySicily Congenital Malformat Registry, Sicily, ItalyUniv Padua, Dept Paediat, Veneto, ItalyArzignano Hosp, Paediat Unit, Vicenza, Veneto, ItalyUniv Naples Federico II, Naples, ItalyInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Genet, RYVEMCE, Mexico City, DF, MexicoUniv Groningen, NL-9700 AB Groningen, NetherlandsMoscow Birth Defects Registry, Moscow, RussiaECEMC, Madrid, SpainInst Salud Carlos III, Madrid, SpainUniv Complutense, E-28040 Madrid, SpainCDCP, Natl Ctr Environm Hlth, Atlanta, GA, USACDCP, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA 30341, USAUniv Bergen, Bergen, NorwayInt Ctr Birth Defects, Rome, ItalyBotto, LD, CDCP, Natl Ctr Birth Defects & Dev Disabil, Mailstop F-45,4770 Buford Highway NE, Atlanta, GA 30341 USA TI - Geographical and ethnic variation of the 677C > T allele of 5,10 methylenetetrahydrofolate reductase (MTHFR): findings from over 7000 newborns from 16 areas world wide MH - Australia MH - Canada MH - Finland MH - France MH - USA MH - Hungary MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Norway MH - Peoples R China MH - Russia MH - Spain PB - LONDON: BRITISH MED JOURNAL PUBL GROUP RP - NOT IN FILE U3 - TC 54 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0022-2593 UR - ISI:000184761400012 L2 - NEURAL-TUBE DEFECTS; THERMOLABILE METHYLENETETRAHYDROFOLATE REDUCTASE; MATERNAL RISK-FACTORS; C677T MUTATION; DOWN-SYNDROME; BINOMIAL PROPORTION; FOLATE METABOLISM; HIGH-PREVALENCE; SPINA-BIFIDA; POLYMORPHISMS SO - Journal of Medical Genetics 2003 ;40(8):619-625 9855 UI - 7245 AU - Wilkin FP AU - Akeson RL AD - Univ Nacl Autonoma Mexico, Inst Astron, Unidad Morelia, Morelia, Michoacan, MexicoCALTECH, Michelson Sci Ctr, Pasadena, CA 91125, USAWilkin, FP, Univ Nacl Autonoma Mexico, Inst Astron, Unidad Morelia, Apdo Postal 3-72 Xangari, Morelia, Michoacan, Mexico TI - Palomar Testbed Interferometer observations of Young Stellar Objects AB - We present observations of a sample of Herbig AeBe stars, as well as the FU Orionis object V1057 Cygni. Our K-band (2.2 mum) observations from the Palomar Testbed Interferometer (PTI) used baselines of 110 m and 85 m, resulting in fringe spacings of similar to 4 mas and 5 mas, respectively. Fringes were obtained for the first time on V1057 Cygni as well as V594 Cas. Additional measurements were made of MWC147, while upper limits to visibility-squared are obtained for MWC297, HD190073, and MWC614. These measurements are sensitive to the distribution of warm, circumstellar dust in these sources. If the circumstellar infrared emission comes from warm dust in a disk, the inclination of the disk to the line of sight implies that the observed interferometric visibilities should depend upon hour angle. Surprisingly, the observations of Millan-Gabet, Schloerb and Traub (2001) (hereafter MST) did not show significant variation with hour angle. However, limited sampling of angular frequencies on the sky was possible with the IOTA interferometer, motivating us to study a subset of their objects to further constrain these systems MH - Mexico|Michoacan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000185920800016 L2 - optical interferometry;young stars;circumstellar matter;HERBIG AE/BE STARS SO - Astrophysics and Space Science 2003 ;286(1-2):145-150 9856 UI - 8222 AU - Wilkin FP AU - Stahler S AD - Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAWilkin, FP, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Morelia 58089, Michoacan, Mexico TI - Trapped protostellar winds and their breakout AB - Observations show that high-velocity jets stem from deeply embedded young stars, which may still be experiencing infall from their parent cloud cores. Yet theory predicts that, early in this buildup, any outgoing wind is trapped by incoming material of low angular momentum. As collapse continues and brings in more rapidly rotating gas, the wind can eventually break out. Here we model this transition by following the motion of the shocked shell created by impact of the wind and a rotating, collapsing envelope. We first demonstrate, both analytically and numerically, that our previous, quasi-static solutions are dynamically unstable. Our present, fully time-dependent calculations include cases both where the wind is driven back by infall to the stellar surface and where it erupts as a true outflow. For the latter, we find that the time of breakout is 5 x 10(4) yr for wind speeds of 200 km s(-1). The reason for the delay is that the shocked material, including the swept-up infall, must be able to climb out of the star's gravitational potential well. We explore the critical wind speed necessary for breakout as a function of the mass transport rates in the wind and infall, as well as the cloud rotation rate Omega(0) and time since the start of infall. Breakout does occur for realistic parameter choices. The actual breakout times would change if we relaxed the assumption of perfect mixing between the wind and infall material. Our expanding shells do not exhibit the collimation of observed jets but continue to expand laterally. To halt this expansion, the density in the envelope must fall off less steeply than in our model MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000183459200027 L2 - circumstellar matter;hydrodynamics;ISM : jets and outflows;shock waves;stars : mass loss;stars : pre-main-sequence;YOUNG STELLAR OBJECTS; STAR-FORMATION; OUTFLOW COLLIMATION; BIPOLAR OUTFLOWS; COLLAPSE; CLOUDS; DISKS; CONFINEMENT; SHOCKS; MODELS SO - Astrophysical Journal 2003 ;590(2):917-931 9857 UI - 7866 AU - Willems A AU - Fernandez-Lopez M AU - Munoz-Adelantado E AU - Goris J AU - De Vos P AU - Martinez-Romero E AU - Toro N AU - Gillis M AD - State Univ Ghent, Fac Wetenschappen, Lab Microbiol, Vakgrp Biochem Fysiol Microbiol, B-9000 Ghent, BelgiumCSIC, Grp Ecol Genet, Estac Expt Zaidin, E-18008 Granada, SpainUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijacion Nitrogeno, Cuernavaca, Morelos, MexicoWillems, A, State Univ Ghent, Fac Wetenschappen, Lab Microbiol, Vakgrp Biochem Fysiol Microbiol, Ledeganckstr 35, B-9000 Ghent, Belgium TI - Description of new Ensifer strains from nodules and proposal to transfer Ensifer adhaerens Casida 1982 to Sinorhizobium as Sinorhizobium adhaerens comb. nov. Request for an opinion AB - A group of four diverse rhizobial isolates and two soil isolates that are highly related to Ensifer adhaerens were characterized by a polyphasic approach. On the basis of DNA-DNA hybridizations and phenotypic features, these strains cannot be distinguished clearly form Ensifer adhaerens, a soil bacterium that was described in 1982, mainly on the basis of phenotypic characteristics. Phylogenetically, Ensifer and Sinorhizobium form a single group in the 16S rDNA dendrogram of the alpha-Proteobacteria, as well as in an analysis of partial recA gene sequences. They may therefore be regarded as a single genus. Because Sinorhizobium was proposed in 1988, according to the Bacteriological Code (1990 Revision) the older name, Ensifer, has priority. However, there are several reasons why a change from Sinorhizobium to Ensifer may not be the best solution and making an exception to Rule 38 may be more appropriate. We therefore propose the species Sinorhizobium adhaerens comb. nov. and put forward a Request for an Opinion to the Judicial Commission regarding the conservation of Sinorhizobium adhaerens over Ensifer adhaerens MH - Belgium MH - Mexico|Morelos MH - Spain PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000184237700042 L2 - NONSYMBIOTIC RHIZOBIUM-LEGUMINOSARUM; DEOXYRIBONUCLEIC-ACID; BURKHOLDERIA-CEPACIA; NUCLEOTIDE-SEQUENCE; DNA HYBRIDIZATION; SP. NOV; GEN-NOV; SOIL; PLASMID; IDENTIFICATION SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():1207-1217 9858 UI - 8637 AU - Willems EW AU - Valdivia LF AU - Villalon CM AU - Saxena PR AD - Univ Med Ctr Rotterdam EMCR, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Farmacobiol, Mexico City 07738, DF, MexicoSaxena, PR, Univ Med Ctr Rotterdam EMCR, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Possible role of alpha-adrenoceptor subtypes in acute migraine therapy AB - Even though the underlying mechanisms for the pathophysiology of migraine attacks are not completely understood, little doubt exists that the headache phase is explained by dilatation of cranial, extracerebral blood vessels. In this context, experimental models predictive for anti-migraine activity have shown that both triptans and ergot alkaloids, which abort migraine headache, produce vasoconstriction within the carotid circulation of different species. In contrast to the well-established role of serotonin (5-hydroxytryptamine; 5-HT) 5-HT1B receptors in the common carotid vascular bed, the role of alpha-adrenoceptors and their subtypes has been examined only relatively recently. Using experimental animal models and alpha(1) - and alpha(2) -adrenoceptor agonists (phenylephrine and BHT933, respectively) and antagonists (prazosin and rauwolscine, respectively), it was shown that activation of either receptor produces a cranioselective vasoconstriction. Subsequently, investigations employing relatively selective antagonists at alpha(1) - (alpha(1A) , alpha(1B) , alpha(1D) ) and alpha(2) - (alpha(2A) , alpha(2B) , alpha(2C) ) adrenoceptor subtypes revealed that specific receptors mediate the carotid haemodynamic responses in these animals. From these observations, together with the potential limited role of alpha(1B) - and alpha(2C) -adrenoceptors in the regulation of systemic haemodynamic responses, it is suggested that selective agonists at these receptors may provide a promising novel avenue for the development of acute anti-migraine drugs MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 19 U4 - Clinical Neurology;Neurosciences U5 - J;Review AV - English IS - 0333-1024 UR - ISI:000182475800001 L2 - alpha-adrenoceptors;alpha-adrenoceptor subtypes;carotid vascular bed;experimental models;migraine;VASCULAR SMOOTH-MUSCLE; ALPHA(2A)-ADRENERGIC RECEPTOR SUBTYPE; EXTERNAL CAROTID VASOCONSTRICTION; ARTERIOVENOUS ANASTOMOSES; ALPHA(1)-ADRENOCEPTOR SUBTYPES; ADRENERGIC-RECEPTOR; SIGNAL-TRANSDUCTION; MESSENGER-RNA; ALPHA(2B)-ADRENERGIC RECEPTOR; ALPHA-1-ADRENOCEPTOR SUBTYPES SO - Cephalalgia 2003 ;23(4):245-257 9859 UI - 8425 AU - Willerer AOM AU - Kot FS AU - Shumilin EN AU - Lutsarev S AU - Rodriguez AJM AD - Interdisciplinary Marine Sci Ctr, La Paz 23096, Baja California, MexicoUniv Colima, CNUNIVO, Manzanillo, Colima, MexicoRussian Acad Sci, Inst Water & Ecol Problems, Far Eastern Branch, Khabarovsk 680000, RussiaRussian Acad Sci, PP Shirshov Oceanol Inst, Moscow, RussiaShumilin, EN, Interdisciplinary Marine Sci Ctr, Av IPN S-N,Apdo Postal 592, La Paz 23096, Baja California, Mexico TI - Mercury in bottom sediments of the tropical Rio Marabasco, its estuary, and Laguna de Navidad, Mexico MH - Mexico|Baja California MH - Mexico|Colima MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000183023200021 L2 - LA-PAZ LAGOON; BAJA-CALIFORNIA; PENINSULA SO - Bulletin of Environmental Contamination and Toxicology 2003 ;70(6):1213-1219 9860 UI - 9883 AU - Williams-Linera G AU - Rowden A AU - Newton AC AD - Inst Ecol, AC, Xalapa 91000, Veracruz, MexicoUniv Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JU, Midlothian, ScotlandWilliams-Linera, G, Inst Ecol, AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Distribution and stand characteristics of relict populations of Mexican beech (Fagus grandifolia var. mexicana) AB - Fagus grandifolia var. mexicana (Mexican beech) is limited to about 10 populations (2-35 ha) in the Sierra Madre Oriental, Mexico. The objectives were to assess the current status and distribution of beech by surveying five sites. Species richness varied between three to 27 tree species in the canopy. and from nine to 29 species in the understorey. Basal area of trees greater than or equal to 5 cm dbh varied between 27.87 and 70.98 m(2) ha(-1). and density, from 370 to 1290 individual ha(-1). Beech represented 22-99.6% of total basal area, and 6.8-83.3% of total density. Beech dominance varied from monodominant to codominance with Carpinus caroliniana, Quercus spp., Liquidambar styraciflua. Magnolia schiedeana. and Podocarpus spp. Beech total population size ranged from 180 to 6300 trees with a total of less than 1300 individuals in four sites. Anthropogenic disturbance remains a major threat to these forests. It is uncertain whether Mexican beech will be able to survive without conservation efforts. (C) 2002 Elsevier Science Ltd. All rights reserved MH - Mexico|Veracruz MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000179138400003 L2 - beech;conservation;tropical montane cloud forest;IUCN;CONSERVATION; FOREST; DISTURBANCE SO - Biological Conservation 2003 ;109(1):27-36 9861 UI - 7839 AU - Williams T AU - Valle J AU - Vinuela E AD - Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainECOSUR, Tapachula 30700, Chiapas, MexicoETSI Agron, Unidad Protecc Cultivos, E-28040 Madrid, SpainWilliams, T, Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, Spain TI - Is the naturally derived insecticide Spinosad (R) compatible with insect natural enemies? AB - Spinosad(R) (Dow Agrosciences) is a neurotoxic insecticide produced by fermentation of an actinomycete. Spinosad is classified as an environmentally and toxicologically reduced risk material and has been embraced by IPM practitioners as a biorational pesticide. We examined the available information on the impact of spinosad on natural enemies and classified mortality responses to spinosad using the IOBC laboratory and field scales that run from 1 (harmless) to 4 (harmful). In total, there were 228 observations on 52 species of natural enemies, of which 162 involved predators (27 species) and 66 involved parasitoids (25 species). Overall, 71% (42/59) of laboratory studies and 79% (81/103) of field-type studies on predators gave a class 1 result (not harmful). Hymenopteran parasitoids are significantly more susceptible to spinosad than predatory insects with 78% (35/45) of laboratory studies and 86% (18/21) of field-type studies returning a moderately harmful or harmful result. Predators generally suffer insignificant sub-lethal effects following exposure to spinosad, whereas parasitoids often show sub-lethal effects including loss of reproductive capacity, reduced longevity, etc. All studies agree that spinosad residues degrade quickly in the field, with little residual toxicity at 3-7 days post-application. We also examined the importance of route of exposure, species-specific and stage-specific susceptibility and we make recommendations for future studies. We conclude that for conservation of predator populations, spinosad represents one of the most judicious insecticides available but the use of this product should be evaluated carefully in situations where conservation of parasitoid populations is of prime concern MH - Mexico|Chiapas MH - Spain PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 39 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Review AV - English IS - 0958-3157 UR - ISI:000184433800001 L2 - Spinosad;biorational insecticide;toxicity;insect predators;parasitoids;integrated pest management;ORIUS-INSIDIOSUS HEMIPTERA; MEDITERRANEAN FRUIT-FLY; FRANKLINIELLA-OCCIDENTALIS THYSANOPTERA; GEOCORIS-PUNCTIPES HEMIPTERA; CHRYSOPERLA-CARNEA; PEST-MANAGEMENT; HIPPODAMIA-CONVERGENS; MOTH LEPIDOPTERA; TOXICITY; HYMENOPTERA SO - Biocontrol Science and Technology 2003 ;13(5):459-475 9862 UI - 7632 AU - Willms K AU - Caro JA AU - Robert L AD - Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoMetro W Med Ctr, Dept Med, Framingham, MA 01702, USAWillms, K, Natl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Edificio A,Primer Piso,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Ultrastructure of spermatogonia and spermatocyte lobules in Taenia solium strobilae (Cestoda, Cyclophyllidea, Taeniidae) from golden hamsters AB - Golden hamsters (Mesocricetus auratus) were infected with Taenia solium metacestodes dissected from infected pig meat. Adult worms were collected from hamster intestines of animals killed 5-60 days post-infection (dpi), incubated in RPMI 1640 medium with or without colchicine, fixed and processed for transmission electron microscopy (TEM). Sections for light microscopy from 40 different blocks with scolex, immature and mature proglottids were photographed. Thin sections were cut from 25 selected blocks, examined and photographed with TEM. Metaphase mitosis figures were observed in the subtegument of the germinative tissue and interpreted as germ cell precursors. In immature proglottids (20 dpi), discrete cell clusters of three to four cells surrounded by a thin cytoplasmic envelope were identified along the inner border of the lateral excretory ducts. These were also observed in more mature proglottids (40-60 dpi) as clusters of eight cells enclosed in a cytoplasmic envelope, with nuclei of spermatogonia exhibiting the synaptolems of primary meiotic cells. In mature proglottids from 45 dpi, a large number of spermatocyte lobules were found, exhibiting different stages of spermatogenesis from primary spermatocytes to mature filiform spermatids with a single axoneme, annular nucleus and spiral cortical microtubules, similar to spermatozoa described for type III spermiogenesis of species of the family Taeniidae. All mature spermatocyte lobules were enclosed in a highly organized cellular envelope and surrounded by a basal lamina. The envelopes contained a number of distinct organelles, seen in cross-section as discrete lattices of microtubules located between two layers of plasma membrane, as well as thickened furled cytoplasm with numerous strands of rough endoplasmic reticulum and pockets of microtubules MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000184953600008 L2 - INTESTINAL PARASITE; HYMENOLEPIS-DIMINUTA; FINE-STRUCTURE; MATURE SPERMATOZOON; GERMINATIVE REGION; SPERMIOGENESIS; TAPEWORMS SO - Parasitology Research 2003 ;90(6):479-488 9863 UI - 8708 AU - Willms K AU - Robert L AU - Caro JA AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoMetro W Med Ctr, Dept Med, Framingham, MA 01702, USAWillms, K, Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Edificio A,Primer Piso,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Ultrastructure of smooth muscle, gap junctions and glycogen distribution in Taenia solium tapeworms from experimentally infected hamsters AB - Taenia solium adults were grown in hamsters infected by feeding them with cysticerci from pig carcasses. Viable strobilae were collected from the hamster duodenum 20-60 days post-infection, fixed and processed for transmission electron microscopy (TEM). Fourteen strobilae were cut into pieces and embedded in individual blocks. Sections, stained with toluidine blue, were then photographed by light microscopy. Over 1,200 TEM images were obtained from selected blocks. Maturing proglottids exhibited a dense myofilament lattice of connecting fibers, each contained in sarcoplamsic extensions of myocytons and emitting cytoplasmic processes loosely attached to other cells, structures characterized as myocyton-myofilament-pseudopod units, which are interpreted as structures involved in the transport of cells and membrane-bound-glycogen from the germinative tissues to mature proglottids. Densely packed membrane-bound glycogen particles were found between the tegumentary cytons of the neck tissue, and as single-stranded particles between the tegumentary cytons of mature proglottids. These were wrapped around cell bodies in the parenchyma of maturing proglottids and as thin cytoplasmic strands between the testicular lobules of mature proglottids. A large number of cell-to-cell adhesions were identified as gap junctions connected to glycogen strands. We suggest that these are involved in the transport of glucose to differentiating tissues MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000182222700010 L2 - ATOMIC-FORCE MICROSCOPY; SEXUAL DEVELOPMENT; CESTODA; PLATYHELMINTHES; TISSUE; CELLS; TRYPANORHYNCHA; METACESTODES; PARENCHYMA; TGTP1 SO - Parasitology Research 2003 ;89(4):308-316 9864 UI - 7156 AU - Wilman RJ AU - Jarvis MJ AU - Rottgering HJA AU - Binette L AD - Univ Durham, Dept Phys, Durham DH1 3LE, EnglandSterrewacht Leiden, NL-2300 RA Leiden, NetherlandsUniv Durham, Dept Phys, Durham DH1 3LE, EnglandOxford Astrophys, Oxford OX1 3RH, EnglandNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoWilman, RJ, Univ Durham, Dept Phys, Durham DH1 3LE, England TI - The absorbing haloes around high-redshift radio galaxies: the UVES view AB - We summarise the properties of the absorbing haloes around two high-redshift radio galaxies studied with the VLT-UVES echelle spectrograph. The absorbers in 0943 - 242 (z = 2.92) exhibit little further structure compared with previous data-the main absorber still has N(HI) similar or equal to 10(19) cm(-2)-reinforcing the picture in which the absorbing gas occupies a smooth shell beyond the emission line halo. In 0200+015 (z = 2.23) the main absorber now splits into two spatially-resolved systems with N(HI) = 4 x 10(14) cm(-2), one of which has strong CIV absorption, implying a metallicity of Z similar or equal to 10 Zcircle dot. We explain the differences between the two sources with an evolutionary scenario, invoking interaction with the expanding radio source and metal enrichment via a starburst superwind. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1387-6473 UR - ISI:000186085000021 L2 - galaxies : active;galaxies : haloes;galaxies : high-redshift;galaxies : emission lines;galaxies;absorption lines;SUBMILLIMETER; ABSORPTION; EMISSION SO - New Astronomy Reviews 2003 ;47(4-5):279-283 9865 UI - 6783 AU - Wilson EM AU - He B AU - Langley E AD - Univ N Carolina, Labs Reprod Biol, Chapel Hill, NC 27599, USAUniv N Carolina, Dept Pediat, Chapel Hill, NC 27599, USAUniv N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599, USANatl Autonomous Univ Mexico, Inst Biomed Res, Mexico City 04510, DF, MexicoWilson, EM, Univ N Carolina, Labs Reprod Biol, Chapel Hill, NC 27599 USA TI - Methods for detecting domain interactions in nuclear receptors MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology U5 - S;Review AV - English IS - 0076-6879 UR - ISI:000187011900008 L2 - HUMAN ANDROGEN RECEPTOR; LIGAND-BINDING DOMAIN; CARBOXYL-TERMINAL REGIONS; ACTIVATION FUNCTION 2; INTERDOMAIN COMMUNICATION; DNA-BINDING; IN-VIVO; INSENSITIVITY; FXXLF; CORE SO - Nucelar Receptors 2003 ;364():142-152 9866 UI - 9328 AU - Wilson FH AU - Kahle KT AU - Sabath E AU - Lalioti MD AU - Rapson AK AU - Hoover RS AU - Hebert SC AU - Gamba G AU - Lifton RP AD - Yale Univ, Sch Med, Dept Genet, New Haven, CT 06510, USAYale Univ, Sch Med, Dept Med, New Haven, CT 06510, USAYale Univ, Sch Med, Dept Biochem & Mol Biophys, New Haven, CT 06510, USAYale Univ, Sch Med, Howard Hughes Med Inst, New Haven, CT 06510, USAYale Univ, Sch Med, Dept Mol & Cellular Physiol, New Haven, CT 06510, USAUniv Nacl Autonoma Mexico, Mol Phys Unit, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 14000, DF, MexicoLifton, RP, Yale Univ, Sch Med, Dept Genet, 295 Congress Ave,Boyer Ctr Mol Med 154D, New Haven, CT 06510 USA TI - Molecular pathogenesis of inherited hypertension with hyperkalemia: The Na-Cl cotransporter is inhibited by wild-type but not mutant WNK4 AB - Mutations in the serine-threonine kinases WNK1 and WNK4 [with no lysine (K) at a key catalytic residue] cause pseudohypoaldosteronism type II (PHAII), a Mendelian disease featuring hypertension, hyperkalemia, hyperchloremia, and metabolic acidosis. Both kinases are expressed in the distal nephron, although the regulators and targets of WNK signaling cascades are unknown. The Cl- dependence of PHAII phenotypes, their sensitivity to thiazide diuretics, and the observation that they constitute a "mirror image" of the phenotypes resulting from loss of function mutations in the thiazide-sensitive Na-Cl cotransporter (NCCT) suggest that PHAII may result from increased NCCT activity due to altered WNK signaling. To address this possibility, we measured NCCT-mediated Na+ influx and membrane expression in the presence of wild-type and mutant WNK4 by heterologous expression in Xenopus oocytes. Wild-type WNK4 inhibits NCCT-mediated Na-influx by reducing membrane expression of the cotransporter (Na-22-influx reduced 50%, P < 1 x 10(-9), surface expression reduced 75%, p < 1 X 10(-14) in the presence of WNK4). This inhibition depends on WNK4 kinase activity, because missense mutations that abrogate kinase function prevent this effect. PHAII-causinig missense mutations, which are remote from the kinase domain, also prevent inhibition of NCCT activity, providing insight into the pathophysiology of the disorder. The specificity of this effect is indicated by the finding that WNK4 and the carboxyl terminus of NCCT coimmunoprecipitate when expressed in HEK 293T cells. Together, these findings demonstrate that WNK4 negatively regulates surface expression of NCCT and implicate loss of this regulation in the molecular pathogenesis of an inherited form of hypertension MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 140 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000180589000055 L2 - protein serine-threonine kinases;hypertension;thiazide-sensitive Na-Cl cotransporter;ion transport;medical genetics;CHLORIDE REABSORPTION; COLLECTING DUCT; THIAZIDE; PROTEIN; KINASE; MUTATIONS; KIDNEY; SGK SO - Proceedings of the National Academy of Sciences of the United States of America 2003 ;100(2):680-684 9867 UI - 7971 AU - Winant CD AU - de Velasco GG AD - Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093, USACICESE, La Paz, MexicoWinant, CD, Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, 9500 Gilman Dr, La Jolla, CA 92093 USA TI - Tidal dynamics and residual circulation in a well-mixed inverse estuary AB - The tidal and residual circulations in Laguna San Ignacio (LSI), a well-mixed evaporative lagoon located on the Pacific coast of the Baja California peninsula in Mexico, is described based on surveys and moored observations. At tidal periods pressure and axial current fluctuations are about one-quarter of a period out of phase, and so the tidal wave is close to standing. Pressure fluctuations increase and axial currents decrease with distance from the ocean. The fluctuating axial momentum balance is nonlinear and involves local acceleration, advection, barotropic pressure gradients, and friction. The structure of the residual circulation depends on the internal Froude number Fr-i, a measure of the relative strength of tidal and buoyancy forcing. Most of the time, Fr-i is large and the residual flow is laterally variable, driven by the tidally averaged nonlinear advective terms. The sense of this residual circulation is shown to depend on the lateral structure of the tidal stress and is away from the ocean in the deep channels when the tidal wave is standing, as in LSI, and in the opposite direction for a progressive wave. During neap tides, when Fr-i is small, the residual circulation is vertically stratified, with a dense near-bottom flow toward the ocean and relatively fresh inflow at the surface MH - USA MH - Mexico|Baja California Sur PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Oceanography U5 - J;Article AV - English IS - 0022-3670 UR - ISI:000184100400005 L2 - COASTAL-PLAIN ESTUARY; EXCHANGE; FLOWS SO - Journal of Physical Oceanography 2003 ;33(7):1365-1379 9868 UI - 9336 AU - Winkler B AU - Knorr K AU - Hytha M AU - Milman V AU - Soto V AU - Avalos M AD - Univ Frankfurt, Inst Mineral, Abt Kristallog, D-60054 Frankfurt, GermanyUniv Kiel, Mineral Petrog Inst, Inst Geowissensch, D-24098 Kiel, GermanyAccelrys, Cambridge CB5 8RE, EnglandCtr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoWinkler, B, Univ Frankfurt, Inst Mineral, Abt Kristallog, Senckenberganlage 30, D-60054 Frankfurt, Germany TI - Crystal chemistry of molybdenum phosphides from density functional theory calculations AB - The structures, bonding and relative thermodynamic stabilities of the crystalline molybdenum phosphides Mo3P, Mo8P5, Mo4P3, MoP, MoP2, MoP4, have been investigated by density functional theory calculations. The elastic stiffness coefficients for MoP and MoP2 have been predicted. (C) 2002 Elsevier Science Ltd. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000180580700006 L2 - phosphides;molybdenum;density functional theory;GENERALIZED GRADIENT APPROXIMATION; PLANE-WAVE; ELECTRONIC-STRUCTURE; PSEUDOPOTENTIALS; EXCHANGE; BULK SO - Journal of Physics and Chemistry of Solids 2003 ;64(3):405-411 9869 UI - 7173 AU - Wolf JHD AU - Alejandro F AD - ECOSUR, Chiapas, MexicoWolf, JHD, Univ Amsterdam, IBED, POB 94062, NL-1090 GB Amsterdam, Netherlands TI - Patterns in species richness and distribution of vascular epiphytes in Chiapas, Mexico AB - Aim We aim to assess regional patterns in the distribution and species richness of vascular epiphytes with an emphasis on forests that differ in altitude and the amount of rainfall. Location Tropical America, in particularly the 75,000 km(2) large state of Chiapas in southern Mexico at 14.5-18.0degreesN. Chiapas is diverse in habitats with forests from sea-level to the tree-line at c. 3800 m altitude and with annual amounts of rainfall ranging from 800 to over 5000 mm. It is also one of the botanical best-explored regions in the tropics. Methods First we give an overview of epiphyte inventories to date. Such epiphyte surveys were mostly carried out on the basis of surface area or individual trees and we discuss their problematic comparison. Applying a different methodological approach, we then used 12,276 unique vascular epiphyte plant collections from Chiapas that are deposited in various botanical collections. The locality data were georeferenced and compiled in a relational data base that was analysed using a geographical information system. To compare the number of species between inventories that differed in the numbers of records, we estimated the total richness, S-Chao, at each. Results We recorded 1173 vascular epiphyte species in thirty-nine families (twenty-three angiosperms), comprising c. 14% of all confirmed plant species in the state. About half of all species were orchids (568). Ferns and bromeliads were the next species-rich groups with 244 and 101 species, respectively. Most species were found in the Montane Rain Forest and in the Central Plateau. Trees of different forest formations, rainfall regimes, altitudes and physiographical regions supported a characteristic epiphyte flora. Main conclusions We were able to confirm the presumed presence of a belt of high diversity at mid-elevations (500-2000 m) in neotropical mountains. In contrast to predictions, however, we observed a decrease in diversity when the annual amount of rainfall exceeded 2500 mm. The decrease is attributed to wind-dispersed orchids, bromeliads and Pteridophyta that may find establishment problematical under frequent downpours. In the wet but seasonal forests in Chiapas, this decrease is not compensated by plants in the animal-dispersed Araceae that are abundant elsewhere. We presume that in addition to the annual amount of rainfall, its distribution in time determines the composition of the epiphyte community MH - Mexico|Chiapas MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 21 U4 - Ecology;Geography, Physical U5 - J;Review AV - English IS - 0305-0270 UR - ISI:000186169500004 L2 - botanical collections;canopy biology;elevation gradient;epiphyte quotient;geographical information system;rainfall gradient;S-Chao estimate of diversity;tropical forests;TROPICAL RAIN-FOREST; CLOUD FOREST; ALTITUDINAL GRADIENT; CENTRAL VERACRUZ; MONTANE FOREST; MOUNT-KINABALU; CANOPY TREES; COSTA-RICA; DIVERSITY; ECOLOGY SO - Journal of Biogeography 2003 ;30(11):1689-1707 9870 UI - 8611 AU - Wong-Chew RM AU - Beeler JA AU - Audet S AU - Santos JI AD - UNAM, Dept Expt Med, Fac Med, Hosp Gen Mexico,Lab Infectol Microbiol & Immunol, Mexico City 06726, DF, MexicoConsejo Nacl Vacunac, Ctr Nacl Salud Infancia & Adolescencia, Secretaria Salud, Mexico City, DF, MexicoUS FDA, Div Viral Prod, Bethesda, MD, USAWong-Chew, RM, UNAM, Dept Expt Med, Fac Med, Hosp Gen Mexico,Lab Infectol Microbiol & Immunol, Dr Balmis 148,Colonia Doctores, Mexico City 06726, DF, Mexico TI - Cellular and humoral immune responses to measles in immune adults re-immunized with measles vaccine AB - The objective of this study was to characterize the kinetics' of the cellular and humoral immune responses elicited by measles vaccine given to previously immune adults. The cellular and humoral immune responses to measles were measured in seven healthy adults, before vaccination and at 1, 2, 3, and 4 weeks and 3 months after vaccination, using measles-specific T-cell proliferation and plaque reduction neutralization assays. All study subjects had detectable measles antibodies, but only six (85%) showed protective titers, defined as >1:120, before immunization. However measles-specific T-cell proliferation was not detectable before vaccination in any of the subjects. The six subjects with protective titers showed a positive stimulation index (SI) of >3.0 within the first 4 weeks after vaccination, an SI of 5 at the 4th week, and an SI of 3 at 3 months after vaccination. The subject with a low antibody titer (1:99) before vaccination developed a high SI at 3 months after vaccination. This subject was the only participant whose neutralizing antibody titers increased more than 4-fold by 3 months after vaccination. No significant increases in geometric mean titers were detected in the other six subjects during the follow-up period. These data suggest that high measles antibody titers interfere with the humoral response in subjects who receive a booster immunization, whereas the cellular response is boosted at least transiently, after revaccination MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Virology U5 - J;Article AV - English IS - 0146-6615 UR - ISI:000182564000015 L2 - cellular immunity;humoral immunity;measles vaccine;booster;ANTIBODY PERSISTENCE; INFANTS; MUMPS; IMMUNOGENICITY; REVACCINATION; 6-MONTH-OLD; RUBELLA; TITERS SO - Journal of Medical Virology 2003 ;70(2):276-280 9871 UI - 6832 AU - Wright RO AU - Hu H AU - Silverman EK AU - Tsaih SW AU - Schwartz J AU - Bellinger D AU - Palazuelos E AU - Weiss ST AU - Hernandez-Avila M AD - Childrens Hosp, Div Energy Med, Dept Pediat, Boston, MA 02115, USAChildrens Hosp, Div Energy Med, Dept Neurol, Boston, MA 02115, USAHarvard Univ, Sch Med, Brigham & Womens Hosp, Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAAmer British Cowdray Hosp, Mexico City 18901, DF, MexicoInst Nacl Perinatol, Inst Nacl Salud Publ, Mexico City 62508, DF, MexicoNatl Publ Hlth Inst, Ctr Invest Salud, Cuernavaca 62508, Morelos, MexicoWright, RO, Childrens Hosp, Div Energy Med, Dept Pediat, 300 Longwood Ave, Boston, MA 02115 USA TI - Apolipoprotein E genotype predicts 24-month Bayley scales infant development score AB - Apolipoprotein E (APOE) regulates cholesterol and fatty acid metabolism, and may mediate synaptogenesis during neurodevelopment. To our knowledge, the effects of APOE4 isoforms on infant development have not been studied. This study was nested within a cohort of mother-infant pairs living in and around Mexico City. A multiple linear regression model was constructed using the 24-mo Mental Development Index (MDI) of the Bayley Scale as the primary outcome and infant APOE genotype as the primary risk factor of interest. Regression models stratified on APOE genotype were constructed to explore effect modification. Of 311 subjects, 53 (17%) carried at least one copy of the APOE4 allele. Mean (SD) MDI scores among carriers with at least one copy of APOE4 Were 94.1 (14.3) and among E3/E2 carriers were 91.2 (14.0). After adjustment for covariates, APOE4 carrier status was associated with a 4.4 point (95% confidence interval: 0.1-8.7; p = 0.04) higher 24-mo MDL. In the stratified regression models, the negative effects for umbilical cord blood lead level on 24-mo MDI score was approximately 4-fold greater among APOE3/APOE2 carriers than among APOE4 carriers. These results suggest that subjects with the E4 isoform of APOE may have advantages over those with the E2 or E3 isoforms with respect to early life neuronal/brain development MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 16 U4 - Pediatrics U5 - J;Article AV - English IS - 0031-3998 UR - ISI:000186816100008 L2 - E-DEFICIENT MICE; AGE 2 YEARS; ALZHEIMERS-DISEASE; CHOLESTEROL TRANSPORT; LIPOPROTEIN RECEPTORS; LEAD-EXPOSURE; CHILDREN; BRAIN; NEURODEGENERATION; DEGENERATION SO - Pediatric Research 2003 ;54(6):819-825 9872 UI - 7392 AU - Wright RO AU - Hu H AU - Schnaas L AU - Hernandez-Avila M AD - Childrens Hosp, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USANatl Inst Publ Hlth, Ctr Res Populat Hlth, Cuernavaca, Morelos, Mexico TI - Maternal dietary cholesterol intake during lactation predicts 24 month infant Bayley Scale score MH - Mexico|Morelos MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000181897900924 SO - Pediatric Research 2003 ;53(4):162A-162A 9873 UI - 7796 AU - Wu J AU - Wu B AU - Stojmenovic I AD - Univ Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaFlorida Atlantic Univ, Dept Comp Sci & Engn, Boca Raton, FL 33431, USAUniv Nacl Autonoma Mexico, DISCA, IIMAS, Mexico City 04510, DF, MexicoStojmenovic, I, Univ Ottawa, SITE, 800 King Edwards, Ottawa, ON K1N 6N5, Canada TI - Power-aware broadcasting and activity scheduling in ad hoc wireless networks using connected dominating sets AB - In ad hoc mobile wireless networks, owing to host mobility, broadcasting is expected to be more frequently used to find a route to a particular host, to page a host, and to alarm all hosts. A straightforward broadcasting by flooding is usually very costly and will result in substantial redundancy and more energy consumption. Power consumption is an important issue since most mobile hosts operate on battery. Broadcasting based on a connected dominating set is a promising approach, where only nodes in the dominating set need to relay the broadcast packet. A set is dominating if all the nodes in the system are either in the set or are neighbors of nodes in the set. Wu and Li proposed a simple and efficient distributed algorithm for calculating connected dominating set in ad hoc wireless networks, where connections of nodes are determined by their geographical distances. In general, nodes in the connected dominating set consume more energy to handle various bypass traffic than nodes outside the set. To prolong the life span of each node and, hence, the network by balancing the energy consumption in the system, nodes should be alternately chosen to form a connected dominating set. Activity scheduling deals with the way of rotating the role of each node among a set of given operation modes (e.g. dominating nodes versus dominated nodes). In this paper, we propose to apply the notion of power-aware connected dominating set to broadcasting and activity scheduling. The effectiveness of the proposed method in prolonging the life span of the network is confirmed through simulation. Copyright (C) 2003 John Wiley Sons, Ltd MH - Canada MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Information Systems;Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1530-8669 UR - ISI:000184465900003 L2 - activity scheduling;ad hoc wireless networks;broadcasting dominating sets;energy level;routing simulation;ALGORITHMS SO - Wireless Communications & Mobile Computing 2003 ;3(4):425-438 9874 UI - 8840 AU - Wunderli PS AU - Dreesen DW AU - Miller TJ AU - Baer GM AD - Immunogen Inc, Cambridge, MA 02139, USAUniv Georgia, Coll Vet Med, Dept Med Microbiol & Parasitol, Athens, GA 30602, USABenchmark Biolabs, Lincoln, NE 68528, USALabs Baer, Mexico City 06101, DF, MexicoWunderli, PS, Immunogen Inc, 128 Sidney St, Cambridge, MA 02139, USA TI - Effects of vaccine route and dosage on protection from rabies after intracerebral challenge in mice AB - Objective-To evaluate the effect of various routes of administration and number of doses of 3 commercially produced rabies vaccines on serum antibody responses and protection in mice challenged by intracerebral injection with fixed-strain rabies virus. Animals-2,213 mice. Procedure-inactivated, adjuvanted rabies vaccines were administered to mice in either 2, 1, or 0 (control) doses via IP, IM, and SC routes, and mice were challenged intracerebrally with fixed-strain rabies virus. Results-Vaccination route and dose number significantly influenced serum antibody responses and protection from rabies virus challenge, independent of vaccine strain origin and mouse strain, although mouse age significantly affected results. Extended challenge studies revealed that IM vaccination of mice resulted in the highest serum neutralizing antibody responses and protection levels equivalent to IP vaccination. Even multiple doses administered SC (a vaccination route used in dogs) resulted in poor serum anti-rabies neutralizing antibody responses in mice and were far less protective than other routes. Conclusions and Clinical Relevance-Findings suggest possible improvements for the current rabies vaccine potency test in mice by using 1 dose, the IM route, and a delayed time of challenge. These modifications would more closely model vaccination practices in target species and yield more accurate information regarding primary immunogenicity of a vaccine MH - Mexico|Distrito Federal MH - USA PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 6 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000181876000017 L2 - NEUTRALIZING ANTIBODY; VIRUS-INFECTION; POTENCY; IMMUNITY SO - American Journal of Veterinary Research 2003 ;64(4):491-498 9875 UI - 6464 AU - Wysocka IA AU - Bulska E AU - Wrobel K AU - Wrobel K AD - Warsaw Univ, Fac Chem, Warsaw, PolandUniv Guanajuato, Inst Invetigaciones Cientif, Guanajuato 36000, MexicoBulska, E, Warsaw Univ, Fac Chem, Ul Pasteura 1, Warsaw, Poland TI - A comparison of electrothermal atomic absorption spectrometry and inductively coupled plasma mass spectrometry for the determination of selenium in garlic AB - Electrothermal atomic absorption spectrometry (ET AAS) and inductively coupled plasma mass spectrometry (ICP MS) have been used for the determination of the total concentration of selenium in garlic after microwave digestion. Studied garlic samples originated from two different geographical regions differing in respect of selenium content in soil: from Eastern Poland, where the soil is poor in selenium, and from Irapuato in Mexico, where the soil is rich in selenium. For both techniques used, the quantification was accomplished by the external standard addition and the regression coefficients were above 0.999. Spectral interferences were controlled using a background correction of Zeeman's effect and applying rhodium as a chemical modifier. For ICP MS measurements the level of selenium isotopes 78 and 82 were monitored, and 10 mug L-1 rhodium solution was used for internal standardization. Under the optimum experimental conditions, the obtained detection limits were 0.6 mug L-1 for ET AAS and 0.05 mug L-1 for ICP MS. For both methods the precision of the procedure was in the range of 3-7%. The results obtained from both methods are in a good agreement, which confirms the accuracy of the analysis. The contents of selenium in garlic grown in two geographical regions were significantly different MH - Mexico|Guanajuato MH - Poland PB - WARSAW: INSTYTUT CHEMII FIZYCZNEJ PAN RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0009-2223 UR - ISI:000188166000006 L2 - selenium;ET AAS;ICP MS;garlic;POLYATOMIC ION INTERFERENCES; ICP-MS; HYDRIDE GENERATION; CAPILLARY-ELECTROPHORESIS; CHEMICAL MODIFIERS; CANCER PREVENTION; SPECIATION; RESOLUTION; REDUCTION; ANTIMONY SO - Chemia Analityczna 2003 ;48(6):919-929 9876 UI - 8765 AU - Xiao MF AU - Rakov N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, Ysidro, CA 92143, USA TI - Surface propagation with a large spectral red-shift on a gold thin film containing subwavelength holes AB - Work is reported on optical far-field transmission and surface propagation with a gold thin film containing randomly distributed small holes of various sizes. Significant light was observed in the far-field transmission and at the edge of the film that is 3 to 10 mm away from the light spot. The spectrum of the surface-guided light redshifted about 200 nm with respect to the spectrum of the transmitted light. (C) 2003 Elsevier Science B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000181989300019 SO - Physics Letters A 2003 ;309(5-6):452-456 9877 UI - 9089 AU - Xiao MF AU - Rakov N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat condensada, Ensenada 22800, Baja California, MexicoXiao, MF, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Enhanced optical near-field transmission through subwavelength holes randomly distributed in a thin gold film AB - Randomly distributed small holes of various subwavelength sizes were fabricated in a thin gold film. We study the optical near-field transmission of the film. In the wavelength spectrum from 350 to 650 nm, a number of strongly enhanced transmission peaks were observed. These transmission peaks can only be observed in the near field. We attribute the new phenomenon to the surface plasmon coupling inside the holes and between the surfaces on the two sides of the thin film MH - Mexico|Baja California MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000181101000004 L2 - SURFACE-PLASMONS; CIRCULAR APERTURE; GRATINGS; ARRAYS SO - Journal of Physics-Condensed Matter 2003 ;15(4):L133-L137 9878 UI - 8083 AU - Ximello-Quiebras JN AU - Mejia-Garcia C AU - Caballero-Rosas A AU - Hernandez-Contreras H AU - Contreras-Puente G AU - Vidal J AU - Pascher H AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv La Habana, Havana, CubaUniv Bayreuth, D-95440 Bayreuth, GermanyXimello-Quiebras, JN, Inst Politecn Nacl, Escuela Super Fis & Matemat, Av IPN,Edificio Fis Avanzada, Mexico City 07738, DF, Mexico TI - Photomodulation study in CdS thin films grown by sputtering in a large area AB - We obtained the band gap energy in different parts of a US thin film processed in a large area (450 cm(2)) by photomodulation (PM) at room temperature. This sample of large area was divided in several parts and we studied eight of them symmetrically distributed in order to determine the corresponding PM-signals. The film was grown on conducting glass (SnO2:F-7 Omega/square) by radio frequency-planar magnetron sputtering method and processed with a substrate temperature at 250 degreesC, a deposition time of 60 min, a radio frequency power of 300 W and with an Ar pressure of 20 mTorr. The results were compared with those obtained by optical transmission and are important from the point of view of getting a good uniformity in large samples. (C) 2003 Elsevier Science B.V. All rights reserved MH - Cuba MH - Germany MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000183680500048 L2 - CdS;radio frequency-planar magnetron sputtering;photomodulation;optical transmission;CDTE SO - Thin Solid Films 2003 ;431():223-225 9879 UI - 6587 AU - Xu JX AU - Fridman L AD - Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, SingaporeNatl Autonomous Univ Mexico, Fac Ingn, Div Estudios Posgrad, DEP FI, Mexico City 04510, DF, MexicoXu, JX, Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117576, Singapore TI - Special issue on variable structure system control - New designs and applications MH - Mexico|Distrito Federal MH - Singapore PB - TAIPEI: CHINESE AUTOMATIC CONTROL SOC RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Editorial Material AV - English IS - 1561-8625 UR - ISI:000187720200001 SO - Asian Journal of Control 2003 ;5(4):I-II 9880 UI - 9490 AU - Xu W AU - Shusterman AJ AU - Videa M AU - Velikov V AU - Marzke R AU - Angell CA AD - Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287, USAReed Coll, Dept Chem, Portland, OR 97202, USADept Quim Tecnol Monterrey, Monterrey, Nuevo Leon, MexicoArizona State Univ, Dept Phys & Astron, Tempe, AZ 85287, USAXu, W, Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287, USA TI - Structures of orthoborate anions and physical properties of their lithium salt nonaqueous solutions AB - We compare the physical properties and solution conductivities of three new lithium orthoborate salts with those of the well-known salt lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). The three new lithium salts are lithium bis(perfluoropinacolato)borate (LiBPFPB), lithium bis(oxalato)borate, and lithium bis(malonato)borate (LiBMB). Computational models of the three orthoborate anions show that the borate oxygens in BPFPB- anion are the least exposed. The oxygens are electronically identical in BPFPB- but not in the other anions. The three new lithium salts show conductivities that closely approach those of LiTFSI but show surprising and solvent-dependent orderings. The conductivity is nearly independent of the salt content in the salt concentration range of 0.5-1 M, which is advantageous for their applications. Self-diffusivity measurements for Li-7, F-19, and H-1 are presented and are consistent with the very high ionic dissociation levels proposed for these salts based on other evidence. The lithium-ion transport number at room temperature for LiBPFPB in nonaqueous solutions exceeds 0.5 and for LiBMB is about 0.4. (C) 2002 The Electrochemical Society MH - Mexico|Nuevo Leon MH - USA PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 12 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000180069000048 L2 - BATTERY ELECTROLYTES; IONIC-CONDUCTIVITY; SELF-DIFFUSION; H-1 SO - Journal of the Electrochemical Society 2003 ;150(1):E74-E80 9881 UI - 9112 AU - Xuluc-Tolosa FJ AU - Vester HFM AU - Ramirez-Marcial N AU - Castellanos-Albores J AU - Lawrence D AD - ECOSUR, Chetumal 77000, Quintana Roo, MexicoECOSUR, San Cristobal de las Casas, Chiapas, MexicoUniv Virginia, Charlottesville, VA 22904, USAVester, HFM, ECOSUR, AP 424,Chetumal CP 77000, Chetumal 77000, Quintana Roo, Mexico TI - Leaf litter decomposition of tree species in three successional phases of tropical dry secondary forest in Campeche, Mexico AB - Leaf litter decomposition rate and nitrogen, carbon and phosphorous (NCP) concentration of three species: Croton lundellii Standl., Metopium brownei (Jacq.) Urban and Manilkara zapota (L.) van Royen were evaluated in different phases of development (3, 13 and >50 years old) of secondary dry forest in Campeche, Mexico, to test two hypotheses: (1) leaf decomposition rate is higher in older successional stages of secondary dry forest; (2) decomposition rate is more rapid in pioneer species than late successional species, because of differences in substrate quality. The litterbag method was employed to evaluate decomposition. Results indicated that decomposition was related to forest development phase but the strongest influence was due to leaf chemical composition. Decomposition was fastest in C. lundellii, intermediate in M. brownei and slowest in M. zapota. The C/N, C/P ratios and total N and P concentrations were good indicators of decomposition rates across species in all successional stages. In comparing leaf litter collected locally and decomposed in situ, the earlier successional phase showed higher decomposition rates than later stages of succession. Neither N concentration or C/N ratio explained this difference, but it was correlated with higher P concentration. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Chiapas MH - Mexico|Quintana Roo MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000181137200030 L2 - Croton lundellii;Metopium brownei;Manilkara zapota;litter quality;decay rate;succession;NORTHEASTERN YUCATAN PENINSULA; LIGNIN CONTROL; RAIN-FOREST; NITROGEN; DYNAMICS; RATES; INDIA SO - Forest Ecology and Management 2003 ;174(1-3):401-412 9882 UI - 8072 AU - Yakut K AU - Tarasov AE AU - Ibanoglu C AU - Harmanec P AU - Kalomeni B AU - Holmgren DE AU - Bozic H AU - Eenens P AD - Univ Ege, Fac Sci, Dept Astron & Space Sci, TR-35100 Izmir, TurkeyCrimean Astrophys Observ, UA-98409 Nauchnyi, Crimea, UkraineIsaac Newton Inst Chile, Crimean Branch, UA-98409 Nauchnyi, Crimea, UkraineCharles Univ, Astron Inst, CR-18000 Prague 8, Czech RepublicAcad Sci, Astron Inst, Ondrejov 25165, Czech RepublicSMART Technol Inc, Calgary, AB T2A 7W6, CanadaDominion Astrophys Observ, Victoria, BC V8X 4M6, CanadaUniv Zagreb, Hvar Observ, Fac Geodesy, Zagreb 10000, CroatiaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoYakut, K, Univ Ege, Fac Sci, Dept Astron & Space Sci, TR-35100 Izmir, Turkey TI - Basic physical properties of the close binary V497 Cep in the open cluster NGC 7160 AB - New light and radial-velocity curves of V497 Cep, a binary in the open cluster NGC 7160, were obtained and the linear ephemeris of the system was refined to HJD (Min I)=(2446 299.196+/-0.0064)+(1.(d)2028287+/-0.(d)0000015) x E. The first light and radial-velocity curve solutions allowed us to derive the basic physical properties of this astrophysically important binary. It was found that the observed light variation of V497 Cep consists of a strong ellipticity effect and a small contribution from grazing eclipses. A comparison of masses and radii of V497 Cep with theoretical evolutionary tracks indicates that both binary components are very close to the zero-age main sequence. A comparison of disentangled line profiles of the He I 6678 line with synthetic, rotationally broadened line profiles indicates that the rotation of both stars is synchronized with the orbital revolution as expected. This finding increases the credibility of our solutions. We find E(B-V)=0.(m)9. The distance to the cluster NGC 7160 was found to be about 760 (+/-100) pc which agrees well with other available estimates MH - Canada MH - Croatia MH - Czech Republic MH - Mexico|Guanajuato MH - Turkey MH - Ukraine PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000183881000031 L2 - stars : binaries : eclipsing;stars : binaries : spectroscopic;stars : individual : V497 Cep;Galaxy : open clusters and associations : individual : NGC 7160;STARS; MODELS SO - Astronomy & Astrophysics 2003 ;405(3):1087-1093 9883 UI - 7756 AU - yala-Bravo HA AU - Quintanar-Guerrero D AU - Naik A AU - Kalia YN AU - Cornejo-Bravo JM AU - Ganem-Quintanar A AD - Univ Nacl Autonoma Mexico, Div Estudios Posgrad Tecnol Farmaceut, Fac Estudios Super Cuautitlan, Cuautitlan 54704, MexicoCtr Interuniv Rech & Enseignement, F-74160 Archamps, FranceUniv Autonoma Baja California, Fac Ciencias Quim & Ingn, Tijuana 22300, Baja California, MexicoGanem-Quintanar, A, Av 1 Mayo S-N,Infonavit Ctr, Cuautitlan, Mexico TI - Effects of sucrose oleate and sucrose laureate on in vivo human stratum corneum permeability AB - Purpose. The purpose of this work was to 1) investigate the effect of sucrose esters (sucrose oleate and sucrose laureate in water or in Transcutol(R), TC) on the stratum corneum (SC) barrier properties in vivo and 2) examine the impact of these surfactant-like molecules on the in vivo percutaneous penetration of a model penetrant 4-hydroxybenzonitrile (4-HB). Methods. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and transepidermal water loss measurements were used to evaluate the sucrose oleate- and sucrose laureate-induced biophysical changes in SC barrier function in vivo. In addition, the effect of the enhancers on 4-HB penetration was monitored in vivo using ATR-FTIR spectroscopy in conjunction with tape-stripping of the treated site. Results. Treatment of the skin with 2% sucrose laureate or sucrose oleate in TC significantly increased the extent of 4-HB penetration relative to the control. Furthermore, when skin treated with these formulations was examined spectroscopically, the C-H asymmetric and symmetric stretching bands of the lipid methylene groups were characterized by 1) decreased absorbances and 2) frequency shifts to higher wavenumbers. These effects on the SC lipids and 4-HB penetration were more pronounced for sucrose laureate when combined with TC. Conclusions. A combination of sucrose esters (oleate or laureate) and TC is able to temporally alter the stratum corneum barrier properties, thereby promoting 4-HB penetration. These molecules are worthy of further investigation as potential candidates for inclusion in transdermal formulations as penetration enhancers MH - France MH - Mexico|Baja California MH - Mexico|Estado De Mexico PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Multidisciplinary;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0724-8741 UR - ISI:000184596500021 L2 - skin penetration;penetration enhancement;sucrose esters;ATR-FTIR;transepidermal water loss;REFLECTANCE INFRARED-SPECTROSCOPY; SKIN PENETRATION ENHANCEMENT; HAIRLESS MOUSE SKIN; PERCUTANEOUS-ABSORPTION; NONIONIC SURFACTANTS; PROPYLENE-GLYCOL; PERMEATION; ACID; MEMBRANES; INVITRO SO - Pharmaceutical Research 2003 ;20(8):1267-1273 9884 UI - 7434 AU - Yamamoto Y AU - Espinasa L AU - Stock DW AU - Jeffery WR AD - Univ Maryland, Dept Biol, College Pk, MD 20742, USAUniv Autonoma Estado Morelos, CEAMISH, Cuernavaca, Morelos, MexicoUniv Colorado, Dept Environm Populat & Organism Biol, Boulder, CO 80309, USAJeffery, WR, Univ Maryland, Dept Biol, College Pk, MD 20742, USA TI - Development and evolution of craniofacial patterning is mediated by eye-dependent and -independent processes in the cavefish Astyanax AB - We studied the development and evolution of craniofacial features in the teleost fish, Astyanax mexicanus. This species has an eyed surface dwelling form (surface fish) and many different cave dwelling forms (cavefish) with various degrees of reduced eyes and pigmentation. The craniofacial features we examined are the tooth-bearing maxillary bones, the nasal and antorbital bones, the circumorbital bones, and the opercular bones, all of which show evolutionary modifications in different cavefish populations. Manipulations of eye formation by transplantation of the embryonic lens, by lentectomy, or by removing the optic vesicle showed that eye-dependent and -independent processes change both the surface fish and cavefish craniofacial skeletons. The size of the olfactory pits, which the nasal and antorbital bones define, and the size and positioning of the circumorbital bones were found to correlate with eye development. For the six suborbital bones (SO1 - 6), the relationship with the developing eye appears to be due to ossification initiated from foci in the suborbital canal of cranial neuromasts, whose patterning is also highly correlated with the presence or absence of an eye. By contrast, we found that the number of maxillary teeth, the number of SO3 bone elements, the positioning of SO4 - 6 with respect to the opercular bone, and the shape of the opercular bone are not dependent on eye formation and vary among different cavefish populations. The results suggest that evolution of the cavefish craniofacial skeleton is controlled by multiple developmental events, some a direct consequence of eye degeneration and others unrelated to loss of the eye MH - Mexico|Morelos MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 16 U4 - Evolutionary Biology;Developmental Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1520-541X UR - ISI:000185487200001 L2 - DEGENERATION; MEXICANUS; LENS SO - Evolution & Development 2003 ;5(5):435-446 9885 UI - 8100 AU - Yamano H AU - Abe O AU - Matsumoto E AU - Kayanne H AU - Yonekura N AU - Blanchon P AD - Natl Inst Environm Studies, Social & Environm Syst Div, Tsukuba, Ibaraki 3058506, JapanNagoya Univ, Grad Sch Environm Studies, Chikusa Ku, Nagoya, Aichi 4648601, JapanUniv Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130033, JapanNatl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Reef Syst Unit, Cancun 77500, Quintana Roo, MexicoYamano, H, Natl Inst Environm Studies, Social & Environm Syst Div, 16-2 Onogawa, Tsukuba, Ibaraki 3058506, Japan TI - Influence of wave energy on Holocene coral reef development: an example from Ishigaki Island, Ryukyu Islands, Japan AB - Wave energy induced by ocean swell and local winds is an important factor controlling the coral reef development. Here we compare and contrast facies, ages, and accretion rates of reefs that developed independently along windward and leeward margins of the same island. As both reefs face the open ocean, swells provide a background of low- to medium-energy condition with additional energy along windward margins due to prevailing winds. This similarity of the wave-energy regimes (medium to high energy) produced a similar framework facies that was constructed by robust-branching Acropora. However, much greater lateral accretion rates were observed in the high-energy reef than in the medium-energy reef Also, coral cobble facies were only found in the medium-energy reef, indicating that the reef framework was more susceptible to storm breakage than that in the high-energy reef These differences are attributable to the differing biological and ecological responses of corals to wave energy and water motion. (C) 2003 Elsevier Science B.V. All rights reserved MH - Japan MH - Mexico|Quintana Roo PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000183778900003 L2 - coral reef;scleractinean corals;Holocene;facies;wave energy;Ryukyu Islands;SEA-LEVEL CHANGES; GREAT BARRIER-REEF; FRINGING-REEF; SOUTH THAILAND; GRAND-CAYMAN; GROWTH; PACIFIC; FLAT; CIRCULATION; COMMUNITIES SO - Sedimentary Geology 2003 ;159(1-2):27-41 9886 UI - 8473 AU - Yanez J AU - Ramirez J AD - Univ Complutense Madrid, Fac Matemat, Dept Stat & OR, E-28040 Madrid, SpainUniv Autonoma Metropolitana Azcapotzalco, Dept Syst, Mexico City 02200, DF, MexicoYanez, J, Univ Complutense Madrid, Fac Matemat, Dept Stat & OR, E-28040 Madrid, Spain TI - The robust coloring problem AB - Some problems can be modeled as graph coloring ones for which the criterion of minimizing the number of used colors is replaced by another criterion maintaining the number of colors as a constraint. Some examples of these problem types are introduced; it would be the case, for instance, of the problem of scheduling the courses at a university with a fixed number of time slots-the colors-and with the objective of minimizing the probability to include an edge to the graph with its endpoints equally colored. Based on this example, the new coloring problem introduced in this paper will be denoted as the Robust coloring problem, RCP for short. It is proved that this optimization problem is NP-hard and, consequently, only small-size problems could be solved with exact algorithms based on mathematical programming models; otherwise, for large size problems, some heuristics are needed in order to obtain appropriate solutions. A genetic algorithm which solves the RCP is outlined. (C) 2002 Elsevier Science B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Management;Operations Research & Management Science U5 - J;Article AV - English IS - 0377-2217 UR - ISI:000182791900007 L2 - graph theory;graph coloring;timetabling SO - European Journal of Operational Research 2003 ;148(3):546-558 9887 UI - 7132 AU - Yang WQ AU - Stott AL AU - Gamio JC AD - UMIST, Dept Elect Engn & Elect, Manchester M60 1QD, Lancs, EnglandInst Mexicano Petr, Mexico City 07730, DF, MexicoYang, WQ, UMIST, Dept Elect Engn & Elect, Manchester M60 1QD, Lancs, England TI - Analysis of the effect of stray capacitance on an AC-based capacitance tomography transducer AB - An ac-based capacitance transducer has been designed for use in electrical capacitance tomography (ECT) systems. The stray capacitance between the measurement electrodes and earth can be relatively large and may affect the performance of the transducer. This paper analyzes this effect, taking into account the ON-resistance of the CMOS switches in the circuit, the finite gain of op-amps and gain errors in the detection measuring unit, sa that the overall measurement error can be estimated. It is shown that if the stray capacitance varies between 90 and 210 pF, the measurement error would be between +0.03% to -0.1%. This is negligibly small for ECT applications, confirming that this ac-based capacitance transducer is effectively stray-immune MH - United Kingdom MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0018-9456 UR - ISI:000186158600041 L2 - capacitance measurement;circuit analysis;stray-immune;tomography SO - Ieee Transactions on Instrumentation and Measurement 2003 ;52(5):1674-1681 9888 UI - 7071 AU - Yannicelli S AU - Acosta PB AU - Velazquez A AU - Bock HG AU - Marriage B AU - Kurczynski TW AU - Miller M AU - Korson M AU - Steiner RD AU - Rutledge L AU - Bernstein L AU - Chinsky J AU - Galvin-Parton P AU - Arnold GL AD - Abbott Labs, Ross Prod Div, Columbus, OH 43215, USAUniv Nacl Autonoma Mexico, INP,Unidad Genet Nutr, Mexico City, DF, MexicoUniv Mississippi, Med Ctr, Jackson, MS 39216, USAUniv Alberta Hosp, Edmonton Genet Clin, Edmonton, AB T6G 2B7, CanadaMed Coll Ohio, Childrens Mercy Hosp, Toledo, OH 43699, USAChildrens Med Ctr, Dayton, OH, USAChildrens Hosp, Med Ctr, Boston, MA 02115, USAOregon Hlth Sci Univ, Doernbecher Childrens Hosp, Div Metab, Portland, OR 97201, USAOregon Hlth Sci Univ, Doernbecher Childrens Hosp, Dept Pediat, Portland, OR 97201, USAOregon Hlth Sci Univ, Doernbecher Childrens Hosp, Dept Mol & Med Genet, Portland, OR 97201, USAChildrens Hosp Alabama, Birmingham, AL, USAChildrens Hosp, Denver, CO 80218, USAJohns Hopkins Univ, Sch Med, Dept Pediat, Baltimore, MD 21205, USAUniv Hosp, Med Ctr, Stony Brook, NY, USAUniv Rochester, Med Ctr, Rochester, NY 14642, USAAcosta, PB, Abbott Labs, Ross Prod Div, 625 Cleveland Ave, Columbus, OH 43215 USA TI - Improved growth and nutrition status in children with methylmalonic or propionic acidemia fed an elemental medical food AB - Background: Failure-to-thrive (FTT) has been described in patients with organic acidemias treated with low protein diets. Objective: To determine if patients with methylmalonic (MMA) or propionic acidemia (PA) can achieve normal growth and nutrition status. Methods: A 6-month multicenter outpatient study was conducted with infants and toddlers treated with Propimex-1 Amino Acid-Modified Medical Food With Iron (Ross Products Division, Abbott Laboratories, Columbus, OH). Main outcome measures were anthropometrics, protein status indices, plasma retinol, and alpha-tocopherol. Results: Sixteen patients completed the study. Mean baseline age was 0.54 +/- 0.02 years (range 0.03-3.00 years). By study end, mean National Center for Health Statistics (NCHS) weight centile increased from 26 to 49%; mean crown-heel length centile from 25 to 33%; and mean head circumference centile from 43 to 54%. Mean (+/-SE) protein and energy intakes by <6-month-old, 6 < 12-month-old, and 1 < 4-year-old patients were 15.3 +/- 0.9 g and 645 +/- 10 kcal; 18.3 +/- 1.1 g and 741 +/- 92 kcal; and 25.1 +/- 2.46 g and 1062 +/- 100 kcal, respectively. Plasma glycine concentrations were significantly and negatively correlated with energy intake (r = -0.77, p < 0.0005). No correlation was found between dietary protein intakes and plasma ammonia concentrations. Protein status indices, retinol and a-tocopherol concentrations were within reference ranges at study end. Conclusions: Propimex-1 improved growth and nutrition status in patients with MMA or PA in just 6 months when fed in sufficient amounts. Providing energy and protein for patients with FTT at intakes recommended for catch-up growth may have resulted in even better growth. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Canada MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1096-7192 UR - ISI:000186304600015 L2 - growth;nutrition;methylmalonic acidemia;propionic acidemia;retinol;alpha-tocopherol;ORGANIC ACIDEMIAS; CUTANEOUS LESIONS; PROTEIN-INTAKE; REQUIREMENTS; METABOLISM; MANAGEMENT; ACIDURIA; PLASMA; DISORDERS; INFECTION SO - Molecular Genetics and Metabolism 2003 ;80(1-2):181-188 9889 UI - 7400 AU - Yao SY AU - Osborne CS AU - Bharadwaj RR AU - Pasceri P AU - Sukonnik T AU - Pannell D AU - Recillas-Targa F AU - West AG AU - Ellis J AD - Hosp Sick Children, Dev Biol Program, Toronto, ON M5G 1X8, CanadaUniv Toronto, Dept Mol & Med Genet, Toronto, ON, CanadaUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoNIDDKD, Mol Biol Lab, Bethesda, MD 20892, USAEllis, J, Hosp Sick Children, Dev Biol Program, Room 8154,Elm Bldg,555 Univ Ave, Toronto, ON M5G 1X8, Canada TI - Retrovirus silencer blocking by the cHS4 insulator is CTCF independent AB - Silencing of retrovirus vectors poses a significant obstacle to genetic manipulation of stem cells and their use in gene therapy. We describe a mammalian silencer blocking assay using insulator elements positioned between retrovirus silencer elements and an LCRbeta-globin reporter transgene. In transgenic mice, we show that retrovirus silencers are blocked by the cHS4 insulator. Silencer blocking is independent of the CTCF binding site and is most effective when flanking the internal reporter transgene. These data distinguish silencer blocking activity by cHS4 from its enhancer blocking activity. Retrovirus vectors can be created at high titer with one but not two internal dimer cHS4 cores. cHS4 in the LTRs has no effect on expression in transduced F9 cells, suggesting that position effect blocking is not sufficient to escape silencing. The Drosophila insulators gypsy and Scs fail to block silencing in transgenic mice, but gypsy stimulates vector expression 2-fold when located in the LTRs of an infectious retrovirus. The silencer blocking assay complements existing insulator assays in mammalian cells, provides new insight into mechanisms of insulation and is a valuable tool to identify additional silencer blocking insulators that cooperate with cHS4 to improve stem cell retrovirus vector design MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000185353200011 L2 - BETA-GLOBIN INSULATOR; HEMATOPOIETIC STEM-CELLS; LOCUS-CONTROL REGION; ENHANCER-BLOCKING; TRANSGENIC MICE; CHROMATIN INSULATOR; TRANSCRIPTIONAL REPRESSION; HISTONE DEACETYLATION; ATTACHMENT REGION; DROSOPHILA EMBRYO SO - Nucleic Acids Research 2003 ;31(18):5317-5323 9890 UI - 7753 AU - Yepez-Martinez H AU - Hess PO AU - Misicu S AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, GermanyNatl Inst Nucl Phys, Bucharest, RomaniaYepez-Martinez, H, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior,CU,Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - A nuclear vibron model applied to light and heavy nuclear molecules AB - A nuclear vibron model for nuclear molecules consisting of two clusters with inner structure is investigated. The Hamiltonian model has a U-C1(6)xU(C2)(6)xU(R)(4)superscriptSU(C1)(3)xSU(C2)(3)xSU(R)(3) dynamical symmetry. Applying a geometrical mapping, the relation of the parameter of the coherent state to the relative distance of the two clusters is deduced. The Hamiltonian model exhibits a minimum at relative distances different from zero. It is discussed how to deduce the potential, knowing the spectrum, and how to deduce the spectrum, knowing the potential. As a classical example the system C-12+C-12 is taken, where the spectrum is known and the internuclear potential can be obtained. This system serves as a consistency check of the method. Afterwards, the heavy system Sr-96+Ba-146, playing a role as a subsystem of a possible three cluster molecule, is investigated and the possible structure of the spectrum is deduced. We show that in order to obtain a Hamiltonian consistent with a geometrical picture, the structure of this Hamiltonian is restricted. Ambiguities of the structure of the spectrum still exist but can be ordered into different classes MH - Germany MH - Mexico|Distrito Federal MH - Romania PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000184616100020 L2 - INTERACTING-BOSON MODEL; ALGEBRAIC CLUSTER MODEL; ODD-MASS NUCLEI; SHELL-MODEL; TRINUCLEAR MOLECULES; COLLECTIVE MODES; RESONANCES; FISSION; SPECTRA; STATES SO - Physical Review C 2003 ;68(1): 9891 UI - 8027 AU - Yerli SK AU - Sarna MJ AU - Zola S AU - Smith RC AU - Tovmassian G AD - Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandMiddle E Tech Univ, Dept Phys, TR-06531 Ankara, TurkeyPolish Acad Sci, N Copernicus Astron Ctr, PL-00716 Warsaw, PolandJagiellonian Univ, Astron Observ, PL-30244 Krakow, PolandPedag Univ, Mt Suhora Observ, PL-30084 Krakow, PolandIA UNAM, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoYerli, SK, Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, England TI - A photometric-spectroscopic analysis and the evolutionary status of the Algol-type binary U Coronae Borealis AB - The prime purposes of this study are to obtain reliable orbital parameters for the Algol-type binary U Coronae Borealis (U CrB) and to explain the evolutionary status of this system. All observations of the primary star's radial velocity are consistent with the value K-1 = 58.6 +/- 2.0 km s(-1). Measurements of the radial velocity of the secondary component give K-2 = 185.2 +/- 5.0 km s(-1). Using the photometrically determined inclination of 78.7 +/- 0.3, the masses of the two stars are therefore deduced to be 4.74 +/- 0.28 and 1.46 +/- 0.06 M. for the primary and secondary components, respectively. Using all available observations, we discuss the origin and evolution of the close binary system U CrB. We derive the restrictions concerning masses and period from a general network of calculations of medium mass close binary evolution. Detailed models are calculated within the derived ranges, giving the most likely initial system parameters as and P-i = 1.4 d. It turns out that the interactive evolution up to the present stage has been non-conservative. During its evolution, U CrB has lost about 14 per cent of its initial total mass (DeltaM similar to 1 M.) and around 18 per cent of its initial total angular momentum. We also examine the possibility of probing dynamo action in the mass-losing component of U CrB. We point out that, in order to maintain the evolution of U CrB in its later stages, which is presumably driven by stellar 'magnetic braking', an efficient mechanism for producing large-scale surface magnetic fields in the donor star is required. We suggest that observed X-ray activity in U CrB may be a good indicator of its evolutionary status and the internal structure of the mass-losing component MH - United Kingdom MH - Mexico|Baja California MH - Poland MH - Turkey PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000183965000034 L2 - stars : abundances;binaries : eclipsing;binaries : spectroscopic;stars : evolution;stars : individual : U Coronae Borealis;THERMONUCLEAR REACTION-RATES; LOW-MASS BINARIES; MAGNETIC BRAKING; CHEMICAL EVOLUTION; DOPPLER TOMOGRAPHY; ACCRETION DISKS; CLOSE BINARIES; STELLAR WIND; STARS; SYSTEMS SO - Monthly Notices of the Royal Astronomical Society 2003 ;342(4):1349-1360 9892 UI - 7020 AU - Yeshurun I AU - Morales-Canton V AU - Guerrero-Naranjo JL AU - Bartov E AU - Regil AMD AU - Quiroz-Mercado H AD - Edith Wolfson Med Ctr, Holon, IsraelTel Aviv Univ, Sackler Fac Med, Holon, IsraelUniv Nacl Autonoma Mexico, Hosp Dr Luis Sanchez Bulnes, IAP, Asociac Para Evitat Ceguera Mexico, Mexico City 04510, DF, Mexico TI - Macular translocation using 360 degrees circumferential scleral shortening MH - Israel MH - Mexico|Distrito Federal PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000184607000452 SO - Investigative Ophthalmology & Visual Science 2003 ;44():U91-U91 9893 UI - 9475 AU - Yeshurun I AU - Recillas-Gispert C AU - Navarro-Lopez P AU - rellanes-Garcia L AU - Cervantes-Coste G AD - Univ Nacl Autonoma Mexico, Hosp Dr Louis Sanchez Bulnes, Asociac Evitar Ceguera Mexico, IAP, Mexico City 04030, DF, MexicoTel Aviv Univ, Sackler Fac Med, Edith Wolfson Med Ctr, IL-69978 Tel Aviv, IsraelCervantes-Coste, G, Univ Nacl Autonoma Mexico, Hosp Dr Louis Sanchez Bulnes, Asociac Evitar Ceguera Mexico, IAP, Vicente Garcia Torres 46, Mexico City 04030, DF, Mexico TI - Extensive dynamics in location, shape, and size of aneurysms in a patient with idiopathic retinal vasculitis, aneurysms, and neuroretinitis (IRVAN) syndrome AB - PURPOSE: To describe an unusual case of idiopathic retinal vasculitis, aneurysms, and neuroretinitis (IRVAN) syndrome with rapid dynamics in the number and appearance of the aneurysms. DESIGN: Observational case report. METHODS: Clinical and angiogaphic data of the patient were reviewed. RESULTS: In the course of only 6 months, preexisting retinal aneurysms resolved while new ones appeared. Changes were observed in the shape and size of preexisting lesions. The resolution of lesions in eyes previously untreated by laser is reported for the first time. CONCLUSIONS: Vascular lesions in IRVAN syndrome may show an unusually rapid turnover. The resolution of aneurysms is a part of the natural course of the disease and may occur without previous retinal laser photocoagulation MH - Israel MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000180233900031 L2 - ARTERIAL ANEURYSMS SO - American Journal of Ophthalmology 2003 ;135(1):118-120 9894 UI - 8165 AU - Yi JG AU - Lin H AU - Alvarez L AU - Horowitz R AD - Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USANatl Autonomous Univ Mexico, Inst Ingn, Coyoacan 04510, DF, MexicoHorowitz, R, Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA TI - Stability of macroscopic traffic flow modeling through wavefront expansion AB - In this paper, second-order macroscopic vehicle traffic flow models are discussed from the perspective of their capability to reproduce stable and unstable traffic flow behaviors observed in real traffic. To achieve this goal, a nonlinear traffic flow stability criterion is derived using a wavefront expansion technique. Qualitative relationships between traffic flow stability and model parameters are derived for an entire class of second-order macroscopic traffic flow models. The stability criterion is illustrated by numerical results using the CLAWPACK package for the well-known Payne-Whitham (PW) model. The newly derived stability results are consistent with previously reported results obtained using both microscopic models and approximate linearization methods. Moreover, the stability criteria derived in this paper can provide more refined information regarding the propagation of traffic flow perturbations and shock waves in second-order models than previously established methodologies. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Civil;Operations Research & Management Science;Transportation;Transportation Science & Technology U5 - J;Article AV - English IS - 0191-2615 UR - ISI:000183685200004 L2 - traffic stability;macroscopic traffic models;wavefront expansion;NUMERICAL-SIMULATION; PROPAGATION; HIGHWAY SO - Transportation Research Part B-Methodological 2003 ;37(7):661-679 9895 UI - 8752 AU - Yi JG AU - Alvarez L AU - Claeys C AU - Horowitz R AD - Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Ingn, Coyoacan 04510, DF, MexicoENSIEG, Lab Automat Grenoble, UMR CNRS 5528, INPG, F-38402 St Martin Dheres, FranceHorowitz, R, Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA TI - Emergency braking control with an observer-based dynamic tire/road friction model and wheel angular velocity measurement AB - A control scheme for emergency braking of vehicles is designed. The tire/road friction is described by a LuGre dynamic friction model. The control system output is the pressure in the master cylinder of the brake system. The controller utilizes estimated states for a feedback control law that achieves a near maximum deceleration. The state observer is designed using linear matrix inequality (LMI) techniques. The analysis shows that using the wheel angular speed information exclusively is not sufficient to rapidly estimate the velocity and relative velocity, due to the fact that the dynamical system is almost unobservable with this measurement as output. Findings are confirmed by simulation results that show that the estimated vehicle velocity and relative velocity converge slowly to their true values, even though the internal friction state and friction parameters converge quickly. The proposed control system has two main advantages when compared with an antilock braking system (ABS): (1) it produces a source of a priori information regarding safe spacing between vehicles that can be used to increase safety levels in the highway; and (2) it achieves a near optimal braking strategy with less chattering MH - France MH - Mexico|Distrito Federal MH - USA PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Mechanical U5 - J;Article AV - English IS - 0042-3114 UR - ISI:000182012600002 SO - Vehicle System Dynamics 2003 ;39(2):81-97 9896 UI - 7279 AU - Yogev R AU - Patterson LE AU - Kaplan SL AU - Adler S AU - Morfin MR AU - Martin A AU - Edge-Padbury B AU - Naberhuis-Stehouwer S AU - Bruss JB AD - Childrens Mem Hosp, Chicago, IL 60614, USAE Tennessee Childrens Hosp, Knoxville, TN, USATexas Childrens Hosp, Houston, TX 77030, USABaylor Coll Med, Houston, TX 77030, USAChildrens Med Ctr, Richmond, VA, USAHosp Civil Guadalajara, Guadalajara, Jalisco, MexicoHosp Univ Caracas, Caracas, VenezuelaPharmacia Corp, Kalamazoo, MI, USAYogev, R, Childrens Mem Hosp, Chicago, IL 60614, USA TI - Linezolid for the treatment of complicated skin and skin structure infections in children AB - Background. Gram-positive pathogens are a major cause of complicated skin and skin structure infections (CSSSIs) in children. Many pathogens are developing decreased susceptibility to currently used antibiotics, increasing the need for new therapies. Linezolid is well-tolerated and effective in the treatment of these infections in adults. Objective. To evaluate the clinical efficacy and safety of iv/oral linezolid and iv vancomycin in children with Gram-positive CSSSIs. Methods. Hospitalized children <12 years of age were randomized (2:1 ratio) to receive either linezolid 10 mg/kg iv every 8 h (with the option to change treatment to oral linezolid suspension 10 mg/kg every 8 h) or iv vancomycin 10 to 15 mg/kg every 6 to 24 h (according to age). Clinical response, tolerance and safety were evaluated at follow-up. The results of a subset analysis of patients with CSSSIs are presented here. Results. One hundred twenty intent-to-treat patients (linezolid 80, vancomycin 40) with CSSSI were included in this analysis. Clinical cure rates for clinically evaluable patients with CSSSI did not differ between treatment groups (linezolid, 93.2% vs. vancomycin, 90.0%; P = 0.594). Significantly fewer linezolid-treated patients experienced drug-related adverse events than did vancomycin-treated patients (23% vs. 48%; P = 0.006). The percentages of patients with laboratory abnormalities, including selected hematologic parameters, were generally low and similar between the treatment groups. Conclusions. Linezolid given iv or orally was well-tolerated and safe. It was as effective as vancomycin in treating children with Gram-positive CSSSIs MH - Mexico|Jalisco MH - USA MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000185805300005 L2 - linezolid;skin and skin structure infections;children;RESISTANT STAPHYLOCOCCUS-AUREUS; SOFT-TISSUE INFECTIONS; GRAM-POSITIVE INFECTIONS; ENTEROCOCCUS-FAECIUM; UNITED-STATES; VANCOMYCIN; SUSCEPTIBILITY; COMMUNITY; PROGRAM SO - Pediatric Infectious Disease Journal 2003 ;22(9):S172-S175 9897 UI - 7346 AU - Young JM AU - Kuykendall LD AU - Martinez-Romero E AU - Kerr A AU - Sawada H AD - Landcare Res, Auckland 1003, New ZealandUSDA ARS, Beltsville Agr Res Ctr, Inst Plant Sci, Beltsville, MD 20705, USAUNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoNatl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, JapanYoung, JM, Landcare Res, Private Bag 92170, Auckland 1003, New Zealand TI - Classification and nomenclature of Agrobacterium and Rhizobium - a reply to Farrand et al. (2003) AB - Farrand et al. [Int J Syst Evol Microbiol 53 (2003), 1681-1687] have presented a critique of the proposal of Young et al. [Int J Syst Evol Microbiol 51 (2001), 89-103] to revise the nomenclature and classification of Rhizobium. They argued that Young et al. (200 1) are mistaken in their reclassification of all Agrobacterium species within Rhizobium, and that the resulting nomenclatural revision is 'unnecessary and unwarranted'. These objections arise because the authors appear not to understand the role of formal nomenclature, and fail to distinguish between formal and special-purpose nomenclatures (Bacteriological Code, 1990 Revision). The arguments set out by Farrand et al. (2003) can be addressed in terms of (11) the taxonomic status of the genera Agrobacterium and Rhizobium; (2) the status of species and biovars and their nomenclature; and (3) the role of transmissible genomic elements in classification and nomenclature. Finally, an attempt is made to unravel the confusion underpinning their discussion with a consideration of the relationship between formal and special-purpose nomenclatures MH - Japan MH - Mexico|Morelos MH - New Zealand MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000185551100071 L2 - PLANT-PATHOGENIC BACTERIA; SP-NOV; SP. NOV.; ALLORHIZOBIUM-UNDICOLA; REVISED DESCRIPTIONS; POLYPHASIC TAXONOMY; TUMEFACIENS C58/; CROWN-GALL; CONN 1942; IDENTIFICATION SO - International Journal of Systematic and Evolutionary Microbiology 2003 ;53():1689-1695 9898 UI - 6913 AU - Yurttas L AU - Castro-Gomez R AU - Rogers WJ AU - Holste JC AU - Hall KR AU - Iglesias-Silva GA AD - Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAInst Tecnol Celaya, Dept Ingn Quim, Celaya Gto 38010, MexicoHall, KR, Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USA TI - Experimental P-T-p and enthalpy-increment measurements of trichlorofluoromethane, R-11 (x=0.83), plus chlorodifluoromethane, R-22 (1-x) AB - We have measured experimental liquid densities for R-11 (x = 0.83 nominal) + R-22 (1 - x) using a continuously weighed pycnometer (for liquid densities) and a semi automated, isochoric apparatus (for measurements in the vapor and liquid regions). We calculate phase boundaries from the isochoric measurements. A thermoelectric flow calorimeter was used to measure enthalpy differences in the vapor and liquid regions. The temperature range for all measurements is (230 to 425) K. The experimental pressures range up to 69 MPa for the pycnometer, 9 MPa for the isochoric apparatus, and 6.5 MPa for the calorimeter MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000186579200014 L2 - PRESSURES; EQUATION; EQUILIBRIUM; MIXTURES; STATE SO - Journal of Chemical and Engineering Data 2003 ;48(6):1435-1439 9899 UI - 9022 AU - Yuste F AU - Diaz A AU - Ortiz B AU - Sanchez-Obregon R AU - Walls F AU - Ruano JLG AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Autonoma Madrid, Fac Ciencias, Dept Quim Organ CI, E-28049 Madrid, SpainYuste, F, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Cd Univ, Mexico City 04510, DF, Mexico TI - A stereodivergent approach to syn- and anti-beta-hydroxy-gamma-amino acids. Enantioselective synthesis of N-Boc-statine and N-Boc-3-epistatine mediated by sulfoxides AB - Asymmetric syntheses of the syn- and anti-stereoisomers of N-Boc statine, based on the stereodivergent reduction of a single sulfoxide 5, derived from N-Boc-L-leucine, are reported. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0957-4166 UR - ISI:000181219000005 L2 - CARBOXYLIC-ACIDS; DERIVATIVES; INHIBITORS; REDUCTION SO - Tetrahedron-Asymmetry 2003 ;14(5):549-554 9900 UI - 8305 AU - Zaharieva M AU - Dimov A AU - Stankova P AU - David J AU - Monneveux P AD - INRA, ENSA, UMR Divers & Genome Plantes Cultivees, F-34000 Montpellier 01, FranceInst Plant Genet Resources, Sadovo 4122, BulgariaZaharieva, M, CIMMYT, Wheat Program, AP 6-641, Mexico City 06600, DF, Mexico TI - Morphological diversity and potential interest for wheat improvement of three Aegilops L. species from Bulgaria AB - A collection of fifty-two Aegilops accessions belonging to three tetraploid, self-pollinated species (Ae. cylindrica Host, Ae. geniculata Roth and Ae. neglecta Req. ex Bertol.) and sampled from different eco-geographical regions of Bulgaria was evaluated during three successive years on the basis of morphological descriptors and agronomical characters. Morphological diversity was analysed using a set of thirteen quantitative traits. Significant differences between populations were noted for most morphological traits, highest variation being observed in the three species for thousand kernel weight, grain weight per spike, plant height and earliness. There was not strong relation between the morphology of the studied accessions and their eco-geographical region of origin what was obviously due to marked differences between populations from the same region. The most important characters contributing to the eco-geographical differentiation were those related to vegetative growth in Ae. cylindrica and to grain production and earliness in Ae. geniculata. Considerable variability was found among and within species in response to biotic and abiotic stresses. Ae. cylindrica accessions exibited high frost resistance, but were the most susceptible to rusts and powdery mildew. At the opposite Ae. neglecta and Ae. geniculata were characterized with high level of foliar diseases resistance. Moreover, Ae. geniculata accessions appeared to be the best adapted to drought conditions. Promising accessions were identified and are presently used to introgress potentially useful traits into wheat MH - Bulgaria MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000183201700007 L2 - aegilops;ecogeographic variation;frost and drought;morphological diversity;powdery mildew;resistance;rusts;CARBON ISOTOPE DISCRIMINATION; WATER-USE EFFICIENCY; WILD-WHEAT; HORDEUM-SPONTANEUM; GENICULATA ROTH; RESPONSES SO - Genetic Resources and Crop Evolution 2003 ;50(5):507-517 9901 UI - 8355 AU - Zaidi MB AU - Zamora E AU - Diaz P AU - Tollefson L AU - Fedorka-Cray PJ AU - Headrick ML AD - Hosp Gen O Horan, Lab Invest, Merida 97000, Yucatan, MexicoUS FDA, Ctr Vet Med, Rockville, MD 20857, USAARS, Antimicrobial Resistance Res Unit, USDA, Russell Res Ctr, Atlanta, GA, USAZaidi, MB, Hosp Gen O Horan, Lab Invest, Av Itzaes Jacinto Canek, Merida 97000, Yucatan, Mexico TI - Risk factors for fecal quinolone-resistant Escherichia coli in Mexican children AB - We determined the prevalence of, and risk factors for, fecal quinolone-resistant Escherichia coli (QREC) in 324 children from Yucatan, Mexico. QREC was higher in children with recent Salmonella infection (100%) than in children with diarrhea (61%) or healthy children (54%) (P = 0.007). Multivariate analysis identified recent hospitalization of a family member (P = 0.011, odds ratio [OR] = 5.1) and carriage of Salmonella (P = 0.004, OR = 3.7) as independent risk factors for QREC MH - Mexico|Yucatan MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000183184800037 L2 - ANTIBIOTIC-RESISTANCE; FLORA; EMERGENCE; FLUOROQUINOLONES; TRIMETHOPRIM; COMMUNITY; ANIMALS; HUMANS SO - Antimicrobial Agents and Chemotherapy 2003 ;47(6):1999-2001 9902 UI - 6612 AU - Zaidi PH AU - Srinivasan G AU - Sanchez C AD - Indian Agr Res Inst, Directorate Maize Res, New Delhi 110012, IndiaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoZaidi, PH, Indian Agr Res Inst, Directorate Maize Res, New Delhi 110012, India TI - Morpho-physiological traits associated with variable field performance of different types maize germplasm across multiple environments AB - Field performance of maize varies substantially among various types of germplasm, such as- hybrics, inbred lines, and often with open pollinated varieties (OPVs). Variations in per se performance is better realized under optimal growing conditions, and further widened with increase in level of stresses. We examined sub-tropical/mid-altitude germplasm, including promising hybrids, OPVs and inbred lines under different growing conditions, including optimal conditions, mild-stress (double population density) and severe drought stress. At vegetative growth stage, dry mater partitioning between vegetative and reproductive plant parts, proportion of dry matter allocated to leaf growth in relation to stem, and within reproductive parts the amount of dry matter available for ear development varied significantly among the types of germplasm, across the growing conditions. The best performing genotypes, both within a germplasm type and across the germplasm, showed relatively more biomass allocation to leaf at the cost of stein dry weight, and more city matter accumulation for ear development at the cost of both tassel and stem biomass. Apart from relatively more leaf area, the longevity of active leaf area duration was one of the important characteristics of superior germplasm, across the types of germplasm and growing conditions. Comparatively more cob weight at anthesis was positively correlated with grain yield under drought stress. However, under unstressed or mild stress conditions the relationship was significant only with inbred lines. Across the environments, striking difference was observed for percent kernel abortion during early stage of grain filling (lag phase), both among the germplasm, and also between the best and worst entries within a germplasm type. Rate of kernel growth day(-1) and length of grain filling period were comparatively higher with hybrids than with inbred lines and OPVs. Our findings indicate that these variations in constitutive traits might be the factors responsible for distinct differences in field performance of different types of germplasm. Emphasis on these constitutive traits during selection and improvement of germplasm may prove to be beneficial in improving the performance of genotypes across the unstressed and less-favorable environments MH - India MH - Mexico|Distrito Federal PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000187456900005 L2 - drought;high-density;maize;morphophysiological traits;germplasm type;LOWLAND TROPICAL MAIZE; KERNEL SET; DROUGHT TOLERANCE; STRESS TOLERANCE; GRAIN-YIELD; 8 CYCLES; SELECTION; GROWTH; RESPONSES; SENSITIVITY SO - Maydica 2003 ;48(3):207-220 9903 UI - 6613 AU - Zaidi PH AU - Srinivasan G AU - Sanchez C AD - Indian Agr Res Inst, Directorate Maize Res, New Delhi 110012, IndiaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoZaidi, PH, Indian Agr Res Inst, Directorate Maize Res, New Delhi 110012, India TI - Relationship between line per se and cross performance under low nitrogen fertility in tropical maize (Zea mays L.) AB - Improved maize yields under low nitrogen (N) fertility is desired for both low-input production systems and also for judicious application of fertilizer nitrogen for a sustainable and environment friendly production systems, A key question in breeding for tolerance to low-N fertility is to what extent the performance of maize hybrids can be predicted on the basis of performance of their inbred lines under low-N supply. Past studies showed varied degree of correlations between line and hybrid performance under low-N fertility, ranging front weak to fairly strong relationship. We attempted to examine the impact of low-N supply on relationship between morpho-physiological traits and grain yield measured on inbred parents, all advance generation lines, and their single cross progenies. Reactions of various morpho-physiological traits, except days to anthesis (male flowering), differ significantly at low- and optimal level of N-fertility. superiority of hybrid progenies over parental lines declined under low-N stress, which indicates that hybrids were comparatively more affected than lines due to low-N supply. Data on individual contributions of heterosis and performance of mid-parent showed that per se performance of lines was relatively more important factor in determining the hybrid performance under both the levels of N-supply. Correlations between various secondary traits and grain yield under both low and optimal-N fertility were moderate to strong in case of both parental lines and hybrids. However, it was comparatively stronger in case of hybrid progenies under low-N stress. Correlations between morpho-physiological traits of lines and hybrids, except for car rots, were fairly strong and significant under both the level of N supply. The relationship between grain yield of mid-parent and hybrids was comparatively stronger under low-N fertility. Our findings suggest that performance of hybrid progenies under low-N fertility can be predicted to some extent on the basis of advance generation elite inbred parents with proven performance across N-supply MH - India MH - Mexico|Distrito Federal PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000187456900006 L2 - hybrids;inbred lines;low nitrogen;phenotypic correlations;LOW SOIL-NITROGEN; INBRED LINES; TESTCROSS PERFORMANCE; DROUGHT TOLERANCE; HYBRID PROGENY; TRAITS; EFFICIENCY; SELECTION; NITRATE; RATES SO - Maydica 2003 ;48(3):221-231 9904 UI - 9434 AU - Zamorano A AU - Lamas M AU - Vergara P AU - Naranjo JR AU - Segovia J AD - IPN, Ctr Invest & Estud Avanzados, Dept Fisiol Biofis & Neurociencias, Mexico City 07300, DF, MexicoCSIC, Ctr Nacl Biotecnol, Dept Biol Mol & Celular, Madrid, SpainSegovia, J, IPN, Ctr Invest & Estud Avanzados, Dept Fisiol Biofis & Neurociencias, Av IPN 2508, Mexico City 07300, DF, Mexico TI - Transcriptionally mediated gene targeting of gas1 to glioma cells elicits growth arrest and apoptosis AB - Induction of growth arrest-specific genes (gas1) prevents cell proliferation and/or leads to apoptosis in different cell types. In neurons, it has been recently reported that mild excitotoxic neuronal death is associated with gas1 induction, and that overexpression of Gas1 induces apoptosis in terminally differentiated neurons or in proliferating neuroblastoma cells. In the present study, we have analysed the effects of the transcriptionally mediated targeting of gas1 to C6 rat glioma cells. Expression of Gas1 decreased glial proliferation and induced C6 cell apoptosis. While the identity of the caspase(s) responsible for Gas1-induced apoptosis in neurons has remained elusive, in C6 glioma cells, overexpression of Gas1 reproducibly activated caspase-3. Our results support the concept of targeted expression of gas1 as a potentially useful gene therapy strategy in the treatment of human gliomas. (C) 2002 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Neurosciences U5 - J;Article AV - English IS - 0360-4012 UR - ISI:000180196500010 L2 - glial fibrillary acidic protein;cell cycle;cell death;promoter;caspase-3;tumor;astrocytes;THYMIDINE KINASE GENE; TYROSINE-HYDROXYLASE TRANSGENE; ASTROCYTE-SPECIFIC EXPRESSION; IN-VITRO; EXPERIMENTAL PARKINSONISM; GLIOBLASTOMA-MULTIFORME; BEHAVIORAL RECOVERY; THERAPY; DEATH; PROMOTER SO - Journal of Neuroscience Research 2003 ;71(2):256-263 9905 UI - 6809 AU - Zaphiriou A AU - Robb S AU - Mendez G AU - Murray-Thomas T AU - Hardman SMC AU - McDonagh T AU - Dargie H AU - Cowie MR AD - Natl Heart & Lung Inst, London, EnglandN Glasgow Univ Hosp, Div Cardiol, Glasgow, Lanark, ScotlandCardiol Hosp Siglo XXI, Inst Mexicano Seguro Social, Mexico City, DF, MexicoWhittington Hosp, London N19 5NF, EnglandUniv Coll London Hosp, London, England TI - Using brain natriuretic peptide and N terminal pro-brain natriuretic peptide to rule out heart failure: does it work in clinical practice? Results of the UK natriuretic peptide study MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000185638800957 SO - European Heart Journal 2003 ;24():260-260 9906 UI - 7281 AU - Zaragoza-Caballero S AU - Noguera FA AU - Chemsak JA AU - Gonzalez-Soriano E AU - Rodriguez-Palafox A AU - Ramirez-Garcia E AU - Ayala R AD - IBUNAM, Dept Zool, Mexico City 04510, DF, MexicoIBUNAM, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoUniv Calif Berkeley, Essig Museum Entomol, Berkeley, CA 94720, USAZaragoza-Caballero, S, IBUNAM, Dept Zool, AP 70-153, Mexico City 04510, DF, Mexico TI - Diversity of Lycidae, Phengodidae, Lampyridae, and Cantharidae (Coleoptera) in a tropical dry forest region in Mexico: Sierra de Huautla, Morelos AB - A study of the fauna of the families Lycidae, Phengodidae, Lampyridae and Cantharidae (Coleoptera: Elateroidea) from the tropical deciduous forest of the Sierra de Huautla Biosphere Reserve, Morelos, Mexico is presented. Collections were made between November 1995 and October 1996, during five days of every month. Collection methods included light trapping, Malaise trapping, netting, sweeping and beating. A total of 2157 individuals were collected, belonging to 61 species including 17 species of Lycidae, four of Phengodidae, 19 of Lampyridae, and 21 of Cantharidae. Estimated richness values using the non-parametric estimator ICE for each group, were 23.7 for Lycidae, 12.5 for Phengodidae, 25.4 for Lampyridae and 31.8 for Cantharidae. For each family, species richness and abundance varied with time, with the highest values recorded in the rainy season and lowest values in the dry season MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - SAN FRANCISCO: PACIFIC COAST ENTOMOL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0031-0603 UR - ISI:000185773000003 L2 - Lycidae;Phengodidae;Lampyridae;Cantharidae;Coleoptera;Mexico;tropical dry forest;biodiversity SO - Pan-Pacific Entomologist 2003 ;79(1):23-37 9907 UI - 8008 AU - Zarza H AU - Medellin RA AU - Perez S AD - Natl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUnvi San Carlos, Museo Hist Nat, Col Zool, Guatemala City, GuatemalaZarza, H, Natl Autonomous Univ Mexico, Inst Ecol, AP 70-275, Mexico City 04510, DF, Mexico TI - First record of the yucatan deer mouse, Peromyscus yucatanicus (Rodentia : Muridae) from Guatemala AB - We report the first record of Yucatan deer mouse, Peromyscus yucatanicus, in Guatemala. The Yucatan deer mouse was restricted to Yucatan Peninsula, where it is considered a common species in deciduous to semi-evergreen tropical forests, and secondary growth forests. Two Yucatan deer mice were collected at Laguna Flor de Luna, Laguna del Tigre National Park, Guatemala, on April 1999. This new record constitutes a range extension of 116 km south of the nearest previously known locality at Escarcega, Campeche, Mexico MH - Guatemala MH - Mexico|Distrito Federal PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000183937100023 SO - Southwestern Naturalist 2003 ;48(2):310-312 9908 UI - 6553 AU - Zavala-Hidalgo J AU - Morey SL AU - O'Brien JJ AD - Florida State Univ, Ctr Ocean Atmospher Predict Studies, Tallahassee, FL 32306, USAZavala-Hidalgo, J, Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Seasonal circulation on the western shelf of the Gulf of Mexico using a high-resolution numerical model AB - The seasonal circulation on the western shelf of the Gulf of Mexico is studied using a high-resolution numerical simulation, historical hydrographic data, sea level data, and satellite images. Three regions are distinguished, the Tamaulipas-Veracruz (TAVE) shelf, the Louisiana-Texas (LATEX) shelf, and the western Campeche Bank. On the TAVE shelf there is a swift reversal of the along-shelf current, downcoast from September to March and upcoast from May to August when there is upwelling due to offshore Ekman transport. Circulation on the western Campeche Bank is upcoast throughout the year. The LATEX shelf has a cyclonic circulation, except during summer months when the flow is eastward. During spring-summer the upcoast current on the TAVE shelf reaches the southern Texas shelf where it encounters a downcoast coastal current favoring offshore transports. In the fall-winter, the downcoast current reaches the southern Bay of Campeche where it meets an opposing along-shelf current, generating seasonal offshore transports. During fall and winter, cool low-salinity water from the Mississippi and Atchafalaya Rivers is advected westward along the LATEX shelf onto the TAVE shelf, developing along-shelf fronts and temperature inversions commonly observed over the outer shelf and shelf break. The main forcing over the western shelf of the gulf is the along-coast wind stress component. The existence of the cross-shelf transports in the confluence regions is supported by chlorophyll a data. Up to 80% of the seasonal sea level variability is explained by the along shelf currents and the low-frequency variability of the atmospheric sea level pressure MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 8 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000187865800004 L2 - shelf circulation;western Gulf of Mexico;LOUISIANA CONTINENTAL-SHELF; YUCATAN CHANNEL; CARIBBEAN SEA; ANNUAL CYCLE; LOOP CURRENT; TEMPERATURE; VARIABILITY; FREQUENCY; FIELDS; LEVEL SO - Journal of Geophysical Research-Oceans 2003 ;108(C12): 9909 UI - 6623 AU - Zavala-Rio A AU - Fantoni I AU - Lozano R AD - UTC, CNRS, UMR 6599, F-60205 Compiegne, FranceInst Potosino Invest Cient & Tecnol, San Luis Potosi 78216, MexicoFantoni, I, UTC, CNRS, UMR 6599, BP 20529, F-60205 Compiegne, France TI - Global stabilization of a PVTOL aircraft model with bounded inputs AB - We propose a global stabilizing control design for the planar vertical takeoff and landing (PVTOL) aircraft, with bounded inputs. The approach is based on the use of non-linear combinations of linear saturation functions bounding the thrust input and the rolling moment to arbitrary saturation limits. We provide global convergence of the state to the origin, using a relatively simple algorithm MH - France MH - Mexico|San Luis Potosi PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000187512400006 L2 - SYSTEMS; TRACKING SO - International Journal of Control 2003 ;76(18):1833-1844 9910 UI - 6765 AU - Zavala J AU - vila-Reese V AU - Hernandez-Toledo H AU - Firmani C AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoOsserv Astron Brera, I-23807 Merate, ItalyAvila-Reese, V, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - The luminous and dark matter content of disk galaxies AB - We have compiled a sample of disk galaxies with available photometry in the B and K bands, velocity line- widths and HI integral fluxes. Several parameters that trace the luminous, baryonic and dark matter contents were inferred. We investigated how these parameters vary with different galaxy properties, and compared the results with predictions of galaxy evolutionary models in the context of the Lambda Cold Dark Matter (LambdaCDM) cosmogony. The ratio of disk- to- total maximum circular velocity, (V-d,V- m/ V-t,V- m), depends mainly on the central disk surface density Sigma(d,0) ( or surface brightness, SB), increasing roughly as Sigma(d,0) (0.15). While a fraction of high SB galaxies have a ( V-d,V-m/V-t,V-m) ratio corresponding to the maximum disk solution, the low SB are completely dark matter dominated. The trend is similar for the models, although they have slightly smaller ( V-d,V-m/ V-t,V- m) ratios than observations, in particular at the highest SBs and when small baryon fractions are used. The scatter in the ( V-d,V-m/V-t,V-m)- Sigma(d,0) plot is large. An analysis of residuals shows that ( V-d,V-m/V-t,V-m) tends to decrease as the galaxy is redder, more luminous ( massive), and of earlier type. The models allow us to explain the physics of these results, which imply a connexion between halo structure and luminous properties. The dynamical- to- baryon mass and dynamical mass- to- light ( B and K) ratios at a given radius were also estimated. All these ratios, for observations and models, decrease with Sigma(d,0) ( or SB) and do not correlate significantly with the galaxy scale, contrary to what has been reported in previous works, based on the analysis of rotation curve shapes. We discuss this difference and state the importance of solving the controversy of whether the dark and luminous contents in disk galaxies depend on SB or luminosity. The broad agreement between the models and observations presented here regarding the trends of the dynamical- to- baryon matter and mass- to- light ratios with several galaxy properties favors the LambdaCDM scenario. However, the excess of dark matter inside the optical region of disk galaxies remains the main difficulty MH - Italy MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000187075500005 L2 - cosmology : dark matter;galaxies : evolution;galaxies : fundamental parameters;galaxies : halos;SURFACE BRIGHTNESS GALAXIES; TULLY-FISHER RELATION; HIERARCHICAL FORMATION SCENARIO; URSA-MAJOR CLUSTER; TO-LIGHT RATIOS; SPIRAL GALAXIES; ROTATION CURVES; DOMINATED GALAXIES; ANGULAR-MOMENTUM; HUBBLE SEQUENCE SO - Astronomy & Astrophysics 2003 ;412(3):633-+ 9911 UI - 6812 AU - Zeichner-David M AU - Oishi K AU - Su ZY AU - Zakartchenko V AU - Chen LS AU - Arzate H AU - Bringas P AD - Univ So Calif, Sch Dent, Ctr Craniofacial Mol Biol, Los Angeles, CA 90033, USAUniv Tokushima, Dept Periodontol & Endodont, Tokushima, JapanUniv Nacl Autonoma Mexico, Fac Odontol, Mexico City, DF, MexicoZeichner-David, M, Univ So Calif, Sch Dent, Ctr Craniofacial Mol Biol, 2250 Alcazar St,CSA 106, Los Angeles, CA 90033 USA TI - Role of Hertwig's epithelial root sheath cells in tooth root development AB - During tooth development, after the completion of crown formation, the apical mesenchyme forms the developing periodontium while the inner and outer enamel epithelia fuse below the level of the crown cervical margin to produce a bilayered epithelial sheath termed Hertwig's epithelial root sheath (HERS). The role of HERS cells in root formation is widely accepted; however, the precise function of these cells remains controversial. Functions suggested have ranged from structural (subdivide the dental ectomesenchymal tissues into dental papilla and dental follicle), regulators of timing of root development, inducers of mesenchymal cell differentiation into odontoblasts and cementoblasts, to cementoblast cell precursors. The characterization of the HERS phenotype has been hindered by the small amount of tissue present at a given time during root formation. In this study, we report the establishment of an immortal HERS-derived cell line that can be maintained in culture and then induced to differentiate in vitro. Characterization of the HERS phenotype using reverse transcriptase-polymerase chain reaction and Western blot immunostaining suggests that HERS cells initially synthesize and secrete some enamel-related proteins such as ameloblastin, and then these cells appear to change their morphology and produce a mineralized extracellular matrix resembling acellular cementum. These studies suggest that the acellular and cellular cementum are synthesized by two different types of cells, the first one by HERS-derived cementoblasts and the later by neural crest-derived cementoblasts. (C) 2003 Wiley-Liss, Inc MH - USA MH - Japan MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 22 U4 - Anatomy & Morphology;Developmental Biology U5 - J;Article AV - English IS - 1058-8388 UR - ISI:000186954100010 L2 - HERS;epithelial root sheath;root development;cementoblasts;cementum;Immortomouse;cell lines;epithelial;mesenchymal;CEMENTUM ATTACHMENT PROTEIN; TRANSCRIPTION FACTOR LEF-1; TRANSGENIC MOUSE; PERIODONTAL-LIGAMENT; ACELLULAR CEMENTUM; BETA-CATENIN; IN-VITRO; RAT; LOCALIZATION; DIFFERENTIATION SO - Developmental Dynamics 2003 ;228(4):651-663 9912 UI - 7180 AU - Zeiger JS AU - Hetmanski JB AU - Beaty TH AU - VanderKolk CA AU - Wyszynski DF AU - Bailey-Wilson JE AU - de Luna RO AU - Perandones C AU - Tolarova MM AU - Mosby T AU - Bennun R AU - Segovia M AU - Calda P AU - Pugh EW AU - Doheny K AU - Mcintosh I AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD 21205, USAJohns Hopkins Univ, Sch Med, Baltimore, MD, USABoston Univ, Sch Med, Boston, MA 02118, USANHGRI, NIH, Baltimore, MD, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoCtr Nacl Genet Med, Buenos Aires, DF, ArgentinaAsociac Piel, Buenos Aires, DF, ArgentinaUniv Pacific, Sch Dent, San Francisco, CA 94115, USACharles Univ, Sch Med 1, Prague, Czech RepublicZeiger, JS, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Room 6513,615 N Wolfe St, Baltimore, MD 21205 USA TI - Evidence for linkage of nonsyndromic cleft lip with or without cleft palate to a region on chromosome 2 AB - Results from a genome-wide screen of 10 multiplex families ascertained through probands with nonsyndromic cleft lip with or without cleft palate (CL/P) in Mexico, Argentina, and the United States yielded suggestive evidence of linkage to chromosomes 2, 6, 17 and 18. Fine mapping excluded all regions except chromosome 2. Subsequent analysis was performed on the original 10 families plus an additional 16 families using 31 markers on chromosome 2. This analysis showed intriguing evidence of linkage to 2q (Zlr = 2.26, empirical P- value = 0.028 in a chromosome-wide analysis). Transmission disequilibrium tests also revealed evidence of linkage and disequilibrium for two markers in this region ( D2S168 and D2S1400 with P- values = 0.022 and 0.006, respectively). A subset of these 26 families provided additional evidence for a susceptibility gene for CL/P on 2q, suggesting that further studies of genes in this region are warranted MH - Argentina MH - Czech Republic MH - USA MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1018-4813 UR - ISI:000186074200003 L2 - cleft lip and palate;linkage analysis;transmission disequilibrium test;chromosome 2;FAMILIAL OROFACIAL CLEFT; FACTOR-ALPHA LOCUS; CANDIDATE REGIONS; MULTIPLEX FAMILIES; GENOME SCAN; NO EVIDENCE; GENE; ASSOCIATION; MARKERS; MALFORMATION SO - European Journal of Human Genetics 2003 ;11(11):835-839 9913 UI - 8563 AU - Zenit R AU - Koch DL AU - Sangani AS AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCornell Univ, Sch Chem Engn, Ithaca, NY 14853, USASyracuse Univ, Dept Chem Engn & Mat Sci, Syracuse, NY 13244, USAZenit, R, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado,Postal 70-360,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Impedance probe to measure local gas volume fraction and bubble velocity in a bubbly liquid AB - We have developed a dual impedance-based probe that can simultaneously measure the bubble velocity and the gas volume fraction in length scales comparable to the bubble diameter. The accurate determination of the profiles is very important for comparisons with existing theories that describe the rheological behavior of bubbly liquids. The gas volume fraction is determined by the residence time of bubble within the measuring volume of the probe. We have found that the details of the bubble-probe interactions must be taken into account to obtain an accurate measure of the gas volume fraction at a point. We are able to predict the apparent nonlinear behavior of the gas volume fraction measurement at large concentrations. The bubble velocity is obtained from the cross correlation of the signals of two closely spaced identical probes. Performance tests and results are shown for bubble velocity and bubble concentration profiles in a gravity driven shear flow of a bubbly liquid. (C) 2003 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000182570900027 L2 - VOID-FRACTION; FLOWS SO - Review of Scientific Instruments 2003 ;74(5):2817-2827 9914 UI - 8043 AU - Zepeda A AU - Vaca L AU - Arias T AU - Sengpiel F AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City 04510, DF, MexicoMax Planck Inst Neurobiol, Munich, GermanyUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoUniv Wales Coll Cardiff, Cardiff Business Sch, Cardiff, S Glam, WalesZepeda, A, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, AP 70228, Mexico City 04510, DF, Mexico TI - Reorganization of visual cortical maps after focal ischemic lesions AB - Plasticity after central lesions may result in the reorganization of cortical representations of the sensory input. Visual cortex reorganization has been extensively studied after peripheral (retinal) lesions, but focal cortical lesions have received less attention. In this study, we investigated the organization of retinotopic and orientation preference maps at different time points after a focal ischemic lesion in the primary visual cortex (V1). We induced a focal photochemical lesion in VI of kittens and assessed, through optical imaging of intrinsic signals. the functional cortical layout immediately afterwards and at 4. 13, 33, and 40 days after lesion. We analyzed histologic sections and evaluated temporal changes of functional maps. Histological analysis showed a clear lesion at all time points, which shrank over time. Imaging results showed that the retinotopic and orientation preference maps reorganize to some extent after the lesion. Near the lesion, the cortical retinotopic representation of one degree of visual space expands over time, while at the same time the area of some orientation domains also increases. These results show that different cortical representations can reorganize after a lesion process and suggest a mechanism through which filling-in of a cortical scotoma can occur in cortically damaged patients MH - Germany MH - Mexico|Distrito Federal MH - United Kingdom PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Endocrinology & Metabolism;Hematology;Neurosciences U5 - J;Article AV - English IS - 0271-678X UR - ISI:000183985300004 L2 - ischemia;injury;imaging techniques;plasticity;cat;retinotopy;PRIMATE SOMATOSENSORY CORTEX; ADULT CAT; STRIATE CORTEX; ORIENTATION DISCRIMINATION; SUPRASYLVIAN CORTEX; CEREBRAL-ISCHEMIA; FIELD SIZE; AREAS 17; PLASTICITY; DAMAGE SO - Journal of Cerebral Blood Flow and Metabolism 2003 ;23(7):811-820 9915 UI - 8546 AU - Zhang HQ AU - Wang YF AU - Yan YH AU - Li SP AD - Wuhan Univ Technol, Biomat & Engn Ctr, Wuhan 430070, Peoples R ChinaZhang, HQ, Technol Univ Mixteca, Inst Design, Oaxaca 69000, Mexico TI - Precipitation of biocompatible hydroxyapatite whiskers from moderately acid solution AB - Hydroxyapatite (HA) whiskers with uniform morphology and good crystallinity were successfully prepared by a precipitation-hydrolysis method in moderately acid solutions at 85-95 degreesC for 48-120 h. A proper precipitation agent was selected to control the growth of HA crystal in a desired way. The lengths of HA whiskers were in the range of 50-150 mum and aspect ratios (length/diameter) in the range of 40-100. The precipitates formed at each stage of the synthesis were characterized by XRD, FTIR, TG-DSC and SEM techniques. It is revealed that the morphology and crystallinity of the precipitates depended on the synthesis temperature and time as well as the concentrations of soluble calcium and phosphate ions. The HA whiskers obtained were morphologically stable at elevated temperatures below 1200 degreesC. They were formed by the hydrolysis of precursors produced during the reactions and took over the morphology of fibrous octacalcium phosphate [Ca8H2(PO4)(6).5H(2)O, OCP]. The stoichiometric HA whiskers were improved with the increase of the synthetic temperature and the duration. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved MH - Mexico|Oaxaca MH - Peoples R China PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0272-8842 UR - ISI:000182665600010 L2 - hydroxyapatite whiskers;precipitation-hydrolysis;morphology;forming mechanism;thermal stability;NEEDLE-LIKE HYDROXYAPATITE; MECHANICAL-PROPERTIES; PHOSPHATE; COMPOSITES; CERAMICS; GROWTH SO - Ceramics International 2003 ;29(4):413-418 9916 UI - 5874 AU - Zhang SH AU - Li XH AU - Wang ZH AU - George ML AU - Jeffers D AU - Wang FG AU - Liu XD AU - Li MS AU - Yuan LX AD - NE Agr Univ, Coll Agron, Harbin 150030, Heilongjiang, Peoples R ChinaChinese Acad Agr Sci, Inst Crop Breeding & Culitvat, Key Lab Crop Genet & Breeding, Minist Agr,AMBIONET China Lab, Beijing 100081, Peoples R ChinaCIMMYT, Asian Maize Biotechnol Network, IRRI, Manila, PhilippinesCIMMYT, Internat, Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoWang, ZH, NE Agr Univ, Coll Agron, Harbin 150030, Heilongjiang, Peoples R China TI - QTL mapping for resistance to SCMV in chinese maize germplasm AB - In this report we identified QTLs conferring resistance to Sugarcane Mosaic Virus (SCMV) and their use in marker-assisted selection (MAS) was described. The genetic linkage map covering 1543 cM on ten chromosomes with an average interval of 17.3 cM was constructed with 89 SSR marker loci based on a maize population consisting of 184 F-2 individuals from the cross Huangzao4 (resistant)xYe107 (susceptible). The population of 184 F-2:3 families was phenotyped for resistance to SCMV under artificial inoculation at four developmental stages (seedling, elongation, anthesis, and grain-filling). With the method of composite interval mapping, three QTLs conferring resistance to SCMV were detected on chromosomes 3, 5, and 10 at seedling stage; four QTLs on chromosomes 3, 5, 6, 10 at elongation and anthesis stages; and five on chromosomes 3 and 10 showed significant additive gene effects, while the other three QTLs on chromosomes 1, 5 and 6 displayed dominant, over-dominant and partial dominant effects, respectively. Two major QTLs on chromosomes 3 R-scm1 and 10 R-scm3, explaining 7.2% to 26.9% and 15.3% to 15.8% of the phenotypic variance, were consistently detected at four stages. Based on this study, it was recommended that the MAS approach for SCMV resistance, combined with conventional selection method, could employ the QTLs on chromosomes 3, 5 and 10 MH - Mexico|Distrito Federal MH - Peoples R China MH - Philippines PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000220468000009 L2 - Zea mays L.;sugarcane mosaic virus;quantitative trait loci;developmental stage;QUANTITATIVE TRAIT LOCI; SUGARCANE MOSAIC-VIRUS; CONFERRING RESISTANCE; LENGTH POLYMORPHISMS; GENETIC-BASIS; INBRED LINES; RESOLUTION SO - Maydica 2003 ;48(4):307-312 9917 UI - 7791 AU - Zhang X AU - Pacheco-Tena C AU - Inman RD AD - Univ Toronto, Hlth Network, Toronto, ON, CanadaUniv Autonoma Chihua, Hosp Cent Univ, Mexico City, DF, MexicoHosp Clin Parque, Mexico City, DF, MexicoInman, RD, Toronto Western Hosp, Arthrit Ctr Excellence, ECW 8-005,399 Bathurst St, Toronto, ON M5T 2S8, Canada TI - Microbe hunting in the joints MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Rheumatology U5 - J;Editorial Material AV - English IS - 0004-3591 UR - ISI:000184624300001 L2 - POLYMERASE-CHAIN-REACTION; CHROMATOGRAPHY-MASS-SPECTROMETRY; STREPTOCOCCAL CELL-WALL; SYNOVIAL-FLUID CELLS; REACTIVE ARTHRITIS; RHEUMATOID-ARTHRITIS; MURAMIC ACID; CHLAMYDIA-TRACHOMATIS; BACTERIAL COMPONENTS; TISSUE DISTRIBUTION SO - Arthritis & Rheumatism-Arthritis Care & Research 2003 ;49(4):479-482 9918 UI - 8028 AU - Zhang Y AU - Song S AD - Wuhan Univ Sci & Technol, Dept Resources Engn, Wuhan 430081, Peoples R ChinaUniv Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, SLP, MexicoSong, S, Wuhan Univ Sci & Technol, Dept Resources Engn, Jianshe Rd 1, Wuhan 430081, Peoples R China TI - Beneficiation of fluorite by flotation in a new chemical scheme AB - In this work, the froth flotation of fluorite from an ore in China has been studied using an enhanced sodium naphthenate as collector and a salted copper sulfate as the depressant of phosphate minerals. The experimental results show that the enhanced sodium naphthenate is an effective collector in fluorite flotation at a low slurry temperature. The substitution of the enhanced sodium naphthenate for a commonly used fatty acid as collector in fluorite flotation not only greatly lowered slurry temperature-in the system, but also increased the separation efficiency and reduced the reagent cost, resulting in significant economic benefits for fluorite flotation plants in northern areas. Also, it was found that the elimination of phosphate minerals from the fluorite concentrate could be successfully achieved using the salted copper sulfate as a depressant. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|San Luis Potosi MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0892-6875 UR - ISI:000183960500003 L2 - froth flotation;non-metallic ores;flotation collectors;flotation depressants SO - Minerals Engineering 2003 ;16(7):597-600 9919 UI - 9436 AU - Zheng HY AU - Sugimoto C AU - Hasegawa M AU - Kobayashi N AU - Kanayama A AU - Rodas A AU - Mejia M AU - Nakamichi J AU - Guo J AU - Kitamura T AU - Yogo Y AD - Univ Tokyo, Inst Med Sci, Dept Microbiol & Immunol, Lab Viral Infect,Minato Ku, Tokyo 1088639, JapanUniv Tokyo, Fac Med, Dept Urol, Bunkyo Ku, Tokyo 1138655, JapanInst Stat Math, Dept Predict & Control, Minato Ku, Tokyo 1068569, JapanYokohama City Inst Hlth, Yokohama, Kanagawa 2350012, JapanUniv San Carlos, Fac Chem & Pharm, Guatemala City, GuatemalaJurisdicc Sanit 6, Call Jose Cueto & Cerapio Santiago, Torreon Coahuila, MexicoUniv Alberta, Dept Cell Biol, Edmonton, AB T6G 2H7, CanadaUniv Alberta, Dept Biochem, Edmonton, AB T6G 2H7, CanadaYogo, Y, Univ Tokyo, Inst Med Sci, Dept Microbiol & Immunol, Lab Viral Infect,Minato Ku, 4-6-1 Shirokanedai, Tokyo 1088639, Japan TI - Phylogenetic relationships among JC virus strains in Japanese/Koreans and Native Americans speakin Amerind or Na-Dene AB - Many genetic studies using human mtDNA or the Y chromosome have been conducted to elucidate the relationships among the three Native American groups speaking Amerind, Na-Dene, and Eskimo-Aleut. Human polyornavirus JC (JCV) may also help to gain insights into this issue. JCV isolates are classified into more than 10 geographically distinct genotypes (designated subtypes here), which were generated by splits in the three superclusters, Types A, B, and C. A particular subtype of JCV (named MY) belonging to Type B is spread in both Japanese/Koreans and Native Americans speaking Amerind or Na-Dene. In this study, we evaluated the phylogenetic relationships among MY isolates worldwide, using the whole-genome approach, with which a highly reliable phylogeny of JCV isolates can be reconstructed. Thirty-six complete sequences belonging to MY (10 from Japanese/Koreans, 24 from Native Americans, and 2 from others), together with 54 belonging to other subtypes around the world, were aligned and subjected to phylogenetic analysis using the neighbor-joining and maximum-likelihood methods. In the resultant phylogenetic trees, the MY sequences diverged into two Japanese/Korean and five Native American clades with high bootstrap probabilities. Two of the Native American clades contained isolates mainly from Na-Denes and the others contained isolates mainly from Amerinds. The Na-Dene clades were not clustered together, nor were the Amerind clades. In contrast, the two Japanese/Korean clades were clustered at a high bootstrap probability. We concluded that there is no distinction between Amerinds and Na-Denes in terms of indigenous JCVs, although they are linguistically distinguished from each other MH - Canada MH - Guatemala MH - Japan MH - Mexico|Coahuila PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0022-2844 UR - ISI:000180306500003 L2 - JC virus;subtype MY;phylogenetic analysis;Native Americans;Japanese/Koreans;peopling of the Americas;HUMAN POLYOMAVIRUS JC; PROGRESSIVE MULTIFOCAL LEUKOENCEPHALOPATHY; MITOCHONDRIAL-DNA; COMPLETE GENOMES; HUMAN-POPULATIONS; HUMAN MIGRATION; NEW-WORLD; HAPLOTYPES; EVOLUTION; SEQUENCE SO - Journal of Molecular Evolution 2003 ;56(1):18-27 9920 UI - 6718 AU - Zheng P AU - Ammar K AU - Girard AMM AU - Rodermel S AU - Thomas DR AU - Ning L AU - Callis JB AU - Edwards GE AU - Daley L AD - Oregon State Univ, Dept Hort, Corvallis, OR 97331, USACIMMYT, Int Maize Wheat Improvement Ctr, Hybrid Wheat Program, Texcoco, MexicoOregon State Univ, Ctr Gene Res & Biotechnol, Corvallis, OR 97331, USAIowa State Univ, Dept Bot, Ames, IA, USAOregon State Univ, Dept Stat, Corvallis, OR 97331, USABroadcom Corp, Fremont, CA, USAUniv Washington, Dept Chem, Seattle, WA 98195, USAWashington State Univ, Dept Bot, Seattle, WA, USAZheng, P, Oregon State Univ, Dept Hort, Corvallis, OR 97331, USA TI - Test of an in vivo method to detect chloroplast division in crop plants - Part III: Statistical proofs of observation and general utility of the method AB - This article is, the third installment in a series about a novel spectroflulorometric method that allows for in vivo observation of the division, of chloroplast populations in leaves of Arabidopsis thaliana MH - Mexico|Estado De Mexico MH - USA PB - DULUTH: ADVANSTAR COMMUNICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Spectroscopy U5 - J;Article AV - English IS - 0887-6703 UR - ISI:000187181100001 L2 - SCIENCES; LEAVES; WATER SO - Spectroscopy 2003 ;18(12):102-105 9921 UI - 8796 AU - Zhou X AU - Giron JA AU - Torres AG AU - Crawford JA AU - Negrete E AU - Vogel SN AU - Kaper JB AD - Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USAUniv Maryland, Sch Med, Dept Microbiol & Immunol, Baltimore, MD 21201, USABenemerita Univ Autonoma Puebla, Inst Ciencias, Puebla, MexicoKaper, JB, Univ Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201 USA TI - Flagellin of enteropathogenic Escherichia coli stimulates interleukin-8 production in T84 cells AB - The type III secretion system (TTSS) of enteropathogenic Escherichia coli (EPEC) has been associated with the ability of these bacteria to induce secretion of proinflammatory cytokines, including interleukin-8 (IL-8), in cultured epithelial cells. However, the identity of the effector molecule directly involved in this event is unknown. In this study, we determined that the native flagellar filament and its flagellin monomer are activators of IL-8 release in T84 epithelial cells. Supernatants of wild-type EPEC strain E2348/69 and its isogenic mutants deficient in TTSS (escN) and in production of intimin (eac), grown in Luria-Sertani broth, elicited similar amounts of IL-8 secretion by T84 cells. In contrast, supernatants of SPEC fliC mutants and of 18171, a nonflagellated EPEC strain, were defective in inducing IL-8 release, a phenotype that was largely restored by complementation of the fliC gene in the mutant lacking flagella. Purified flagella from E. coli K-12, EPEC serotypes H6 and H34, and enterohemorrhagic E. coli serotype H7 all induced IL-8 release in T84 cells. Induction of IL-8 by purified flagella or His-tagged FliC from EPEC strain E2348/69 was dose dependent and was blocked by a polyclonal anti-H6 antibody. Finally, the mitogen-activated protein kinases (Erk1 and -2 and Jnk) were phosphorylated in flagellin-treated T84 cells, and inhibition of the p38 and Erk pathways significantly decreased the IL-8 response induced by SPEC flagellin. Our data clearly indicate that FliC of SPEC is sufficient to induce IL-8 release in T84 cells and that activation of the Erk and p38 pathways is required for IL-8 induction MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 50 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000181926200063 L2 - INTESTINAL EPITHELIAL-CELLS; TRANSLOCATED INTIMIN RECEPTOR; ACTIVATED PROTEIN-KINASES; INNATE IMMUNE-RESPONSE; 4 SHIGELLA SUBGROUPS; BUNDLE-FORMING PILI; SALMONELLA-TYPHIMURIUM; SIGNAL-TRANSDUCTION; BACTERIAL FLAGELLIN; PEDESTAL FORMATION SO - Infection and Immunity 2003 ;71(4):2120-2129 9922 UI - 7088 AU - Zhou Y AU - Gwaze DP AU - Reyes-Valdes MH AU - Bui T AU - Williams CG AD - Texas A&M Univ, Forest Genet Program, College Stn, TX 77843, USATexas Forest Serv, Forestry Lab, College Stn, TX 77843, USAUniv Autonoma Agraria Antonio Narro, Dept Fitomejoramiento, Saltillo 25315, Coahuila, MexicoWilliams, CG, Texas A&M Univ, Forest Genet Program, College Stn, TX 77843 USA TI - No clustering for linkage map based on low-copy and undermethylated microsatellites AB - Clustering has been reported for conifer genetic maps based on hypomethylated or low-copy molecular markers, resulting in uneven marker distribution. To test this, a framework genetic map was constructed from three types of microsatellites: low-copy, undermethylated, and genomic. These Pinus taeda L. microsatellites were mapped using a three-generation pedigree with 118 progeny. The microsatellites were highly informative; of the 32 markers in intercross configuration, 29 were. segregating for three or four alleles in the progeny. The sex-averaged map placed 51 of the 95 markers in 15 linkage groups at LOD > 4.0. No clustering or uneven distribution across the genome was observed. The three types of P taeda microsatellites were randomly dispersed within each linkage group. The 51 microsatellites covered a map distance of 795 cM, an average distance of 21.8 cM between markers, roughly half of the estimated total map length. The minimum and maximum distances between any two bins was 4.4 and 45.3 cM, respectively. These, microsatellites provided anchor points for framework mapping for polymorphism in R taeda and other closely related hard pines MH - USA MH - Mexico|Coahuila PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000186371300009 L2 - simple sequence repeats;genome duplication;conifers;Pinus taeda L. hypomethylation;low-copy kinetic component;PINUS-TAEDA; GENETIC-MAP; OUTBRED PEDIGREE; CONIFER GENOME; RECOMBINATION; REPEATS; COVERAGE; PLANTS; HARD SO - Genome 2003 ;46(5):809-816 9923 UI - 7362 AU - Zobin VM AU - Levina VI AU - Maguskin MA AD - Univ Colima, Observ Vulcanol, Colima 28045, MexicoRussian Acad Sci, Geophys Serv, Kamchatka Expt & Method Dept, Petropavlovsk Kamchatski 683006, RussiaRussian Acad Sci, Inst Volcanol, Petropavlovsk Kamchatski 683006, RussiaZobin, VM, Univ Colima, Observ Vulcanol, Colima 28045, Mexico TI - Seismicity and crustal deformation preceding the January 1996 eruptions at Karymsky Volcanic Center, Kamchatka AB - Two explosive eruptions occurred on 2 January 1996 at Karymsky Volcanic Center (KVC) in Kamchatka, Russia: the first, dacitic, from the central vent of Karymsky volcano, and the second, several hours later, from Karymskoye lake in the caldera of Akademia Nauk volcano. The main significance of the 1996 volcanic events in KVC was the phreatomagmatic eruption in Karymskoye lake, which was the first eruption in this lake in historical time, and was a basaltic eruption at the acidic volcanic center. The volcanic events were associated with the 1 January Ms 6.7 (Mw 7.1) earthquake that occurred at a distance of about 9-17 km southeast from the volcanoes just before the eruptions. We study the long-term (1972-1995) and short-term (1-2 January 1996) characteristics of crustal deformations and seismicity before the double eruptive event in KVC. The 1972-1995 crustal deformation was homogeneous and characterized by a gradual extension with a steady velocity. The seismic activity in 1972-1995 developed at the depth interval from 0 to 20 km below the Akademia Nauk volcano and spread to the southeast along a regional fault. The seismic activity in January 1996 began with a short sequence of very shallow microearthquakes (M similar to0) beneath Karymsky volcano. Then seismic events sharply increased in magnitude (up to mb 4.9) and moved along the regional fault to the southeast, culminating in the Ms 6.7 earthquake. Its aftershocks were located to the southeast and northwest from the main shock, filling the space between the two active volcanoes and the ancient basaltic volcano of Zhupanovsky Vostryaki. The eruption in Karymskoye lake began during the aftershock sequence. We consider that the Ms 6.7 earthquake opened the passageway for basic magma located below Zhupanovsky Vostryaki volcano that fed the eruption in Karymskoye lake MH - Mexico|Colima MH - Russia PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000185601400002 L2 - Kamchatka;Karymsky Volcanic Center;seismicity;deformations;1996 eruptions;DEFLATION; ICELAND SO - Bulletin of Volcanology 2003 ;65(7):477-485 9924 UI - 9211 AU - Zoriniants SE AU - Nosov AV AU - Monforte-Gonzalez M AU - Mendes-Zeel M AU - Loyola-Vargas VM AD - Russian Acad Sci, KA Timiryazev Plant Physiol Inst, Dept Cell Biol & Biotechnol, Moscow 127276, RussiaCtr Invest Cient Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, MexicoLoyola-Vargas, VM, Russian Acad Sci, KA Timiryazev Plant Physiol Inst, Dept Cell Biol & Biotechnol, Bot Skaya 35, Moscow 127276, Russia TI - Variation of nuclear DNA content during somatic embryogenesis and plant regeneration of Coffea arabica L. using cytophotometry AB - Cytophotometric analysis of nuclear DNA was carried out in leaves of Coffea arabica L. plants grown in vitro. They were maintained for more than I year on MS media containing 0.53 muM NAA, and 2.32 muM kinetin, and embryogenic calli and somatic embryos were derived from them. Four suspension cultures of C arabica differing in their embryogenic potential were also studied. In in vitro leaves used as primary explants many nuclei gave values that were hypoaneuploid, yet the somatic embryos derived from them consisted predominantly of diploid cells. As primary explants were shifted to conditioning medium (MS medium added with 0.53 muM NAA and 2.32 muM kinetin) and then to induction medium (to obtain embryogenic calli; Yasuda medium supplemented with 5 muM BAP), the frequency of hypoaneuploid values dropped. An analysis of four suspension cultures did not reveal any relationship between the cytogenetic state of cell strains and their morphogenetic potential. Of four suspensions, cultures having similar frequencies of diploid cells (60-82%), only one was capable of embryogenesis. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved MH - Mexico|Yucatan MH - Russia PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0168-9452 UR - ISI:000180838400001 L2 - Coffea arabica;somatic embryogenesis;nuclear DNA;cytophotometry;LEAF EXPLANTS; INDUCTION; EMBRYOS; PROTOPLASTS SO - Plant Science 2003 ;164(2):141-146 9925 UI - 7158 AU - Zoz H AU - Ameyama K AU - Umekawa S AU - Ren H AU - Jaramillo VD AD - Zoz GmbH, D-57482 Wenden, GermanyRitsumeikan Univ, Kusatsu 5258577, JapanESIQIE IPN, Natl Polytech Inst, Mexico City 07300, DF, MexicoZoz, H, Zoz GmbH, D-57482 Wenden, Germany TI - Alternative mechanical milling routes for grain-refinement of conventional high-speed steel powder for later consolidation by SPS AB - High-speed steel is the most superior tool steel in terms of wear resistance (it high temperature. In order to further improve materials properties, conventional HSS-powder (< 76 mum) has been mechanically milled by a Planetary Ball Mill (medium kinetic system) and alternatively by a Simoloyer (high kinetic system) in order to reduce particle size and in particular the grain size of the powder material. Consolidation has been done by Spark Plasma Sintering in order to maintain a fine structure of the material. In the Planetary Ball Mill, 25 g of HSS-powder was milled,for 720 ks (200h) and resulted in a particle size of < 15 mum at an average grain size of 10 nm. Similar results in the Simolayer were achieved after 72 ks under higher powder load. The SPS-sintered parts were investigated by hardness, the characterization of the powder is given by XRD, SEM and laser diffraction MH - Germany MH - Japan MH - Mexico|Distrito Federal PB - BERLIN 33: METALL-VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0026-0746 UR - ISI:000186028500008 SO - Metall 2003 ;57(10):640-648 9926 UI - 7769 AU - Zulman DM AU - Rosenberg NA AU - Cuevas ZH AU - Yaurima DM AD - Univ Calif Los Angeles, Sch Med, Los Angeles, CA, USAUniv So Calif, Los Angeles, CA 90089, USALiga Filantropica Salud, Campeche, Mexico TI - Prevalence of iron deficiency anemia in the state of Campeche, Mexico MH - Mexico|Campeche MH - USA PB - HAMILTON: B C DECKER INC RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Meeting Abstract AV - English IS - 1081-5589 UR - ISI:000180569600011 SO - Journal of Investigative Medicine 2003 ;51():S92-S92 9927 UI - 8212 AU - Zuniga JA AU - Villarreal-Garza C AU - Flores E AU - Barquera R AU - Perez-Hernandez N AU - De Oca JVM AU - Cardiel MH AU - Vargas-Alarcon G AU - Granados J AD - Inst Nacl Enfermedades Resp, Lab Mol Biol & Immunogenet, Infect Dis Unit, Mexico City 14080, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Cellular Biol Sect, Dept Physiol, Mexico City, DF, MexicoVirgen Macarena Hosp, Seville, SpainZuniga, JA, Inst Nacl Enfermedades Resp, Lab Mol Biol & Immunogenet, Infect Dis Unit, Calzada Tlalpan 4502, Mexico City 14080, DF, Mexico TI - Biological relevance of the polymorphism in the CCR5 gene in refractory and non-refractory rheumatoid arthritis in Mexicans AB - Objective. The aim of this study was to analyze the frequencies of the CCR5 Delta32 deletion and HLA class II alleles in Mexican Amerindian populations and its relevance in the development and severity of RA. Methods. We studied 212 Mexican Mestizo subjects (40 patients with refractory RA, 102 patients with non-refractory RA and 70 healthy individuals). At the same time, to evaluate the ethnicity-of the CCR5Delta32 deletion we also studied 192 individuals from three Mexican Amerindian populations (70 Mayo (Capomo) individuals, 61 Teenek individuals, and 61 Mazatecan Indians). The A32 deletion in the CCR5 structural gene and HLA-DRB1 were determined by a PCR-SSP and a PCR-SSO procedure, respectively. Results. In the non-refractory RA group the CCR5Delta32 gene frequency was 0.019 and the following genotype frequencies were observed: CCR5/CCR5 = 98.0%, CCR5/CCR5Delta32 = 1.9% and CCR5Delta32/CCR5Delta = 1.0%. In the refractory RA group the CCR5Delta32 gene frequency was 0.025 and the genotype distribution was similar to that in the non-refractory RA group. The deletion was not detected in the Mexican Mestizo healthy group, or among the Teenek and Mayo Amerindians, all being individuals homozygous for the wild type allele. In the Mazatecan group the deletion frequency was 1.6% (g.f = 0.016). We observed a significant increase in the frequency of the DRB1 *07 allele in severe RA patients in relation to the non-severe RA group (p = 0.02, OR = 5.65, 95% CI = 0.95-43.05). Conclusion. Our results suggest that the CCR5Delta32 deletion is not common in Mexican Amerindian populations and this study does not support an important role of CCR5Delta32 in the pathogenesis of RA or a severe form of the disease in Mexicans MH - Mexico|Distrito Federal MH - Spain PB - PISA: CLINICAL & EXPER RHEUMATOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Rheumatology U5 - J;Article AV - English IS - 0392-856X UR - ISI:000183519500015 L2 - CHEMOKINE RECEPTOR-5; HIV-1 INFECTION; SHARED EPITOPE; 32-BASEPAIR DELETION; ASSOCIATION; FREQUENCIES; ALLELE; RESISTANCE; SEVERITY; CELLS SO - Clinical and Experimental Rheumatology 2003 ;21(3):351-354 9928 UI - 6285 AU - Zuniga O AU - Reyes A AU - Pohlan J AD - Univ Valle, Lab Fis Ambiental, Cali, ColombiaUniv Bonn, Inst Obstbau & Gemusebau, D-53121 Bonn, GermanyECOSUR, El Colegio Frontera, Tapachula 30700, Chiapas, MexicoZuniga, O, Univ Valle, Lab Fis Ambiental, AA 25 360, Cali, Colombia TI - The thermal conductivity: An alternative method for the measurement of soil compaction AB - Four treatments of tillage were compared by measuring soil thermal conductivity. Bulk density and difference between treatments pointed to the discriminatory capacity of the method. The soil thermal conductivity measure or Electrothermal Method (EM) has demonstrated to be a new and reliable indicator for the compaction state of soil MH - Colombia MH - Germany MH - Mexico|Chiapas PB - KASSEL: KASSEL UNIV PRESS GMBH RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0041-3186 UR - ISI:000188770200006 L2 - thermal conductivity;tillage;soil compaction;soybean;cocoa;TILLAGE; CROP SO - Journal of Agriculture and Rural Development in the Tropics and Subtropics 2003 ;104(2):173-180 9929 UI - 8313 AU - Zwaan MA AU - Staveley-Smith L AU - Koribalski BS AU - Henning PA AU - Kilborn VA AU - Ryder SD AU - Barnes DG AU - Bhathal R AU - Boyce PJ AU - de Blok WJG AU - Disney MJ AU - Drinkwater MJ AU - Ekers RD AU - Freeman KC AU - Gibson BK AU - Green AJ AU - Haynes RF AU - Jerjen H AU - Juraszek S AU - Kesteven MJ AU - Knezek PM AU - Kraan-Korteweg RC AU - Mader S AU - Marquarding M AU - Meyer M AU - Minchin RF AU - Mould JR AU - O'Brien J AU - Oosterloo T AU - Price RM AU - Putman ME AU - Ruam-Weber E AU - Sadler EM AU - Schroder A AU - Stewart IM AU - Stootman F AU - Warren B AU - Waugh M AU - Webster RL AU - Wright AE AD - Univ Melbourne, Sch Phys, Melbourne, Vic 3010, AustraliaCSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandAnglo Australian Observ, Epping, NSW 1710, AustraliaUniv Western Sydney Macarthur, Sch Engn & Ind Design, Campbelltown, NSW 2560, AustraliaUniv Bristol, Dept Phys, Bristol BS8 1TL, Avon, EnglandUniv Wales Coll Cardiff, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, WalesUniv Queensland, Dept Phys, Brisbane, Qld 4072, AustraliaMt Stromlo & Siding Spring Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaSwinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, AustraliaUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaWIYN Inc, Tucson, AZ 85726, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoNatl Opt Astron Observ, Tucson, AZ 85726, USAASTRON, NL-7990 AA Dwingeloo, NetherlandsUniv Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USAUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandZwaan, MA, Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia TI - The 1000 brightest hipass galaxies: The H I mass function and Omega(H I) AB - We present a new, accurate measurement of the H I mass function of galaxies from the HIPASS Bright Galaxy Catalog, a sample of 1000 galaxies with the highest H I peak flux densities in the southern (delta<0&DEG;) hemisphere. This sample spans nearly 4 orders of magnitude in H I mass [ log (M-H I/M-&ODOT;) + 2 log h(75)=6.8-10.6] and is the largest sample of H I-selected galaxies to date. We develop a bivariate maximum likelihood technique to measure the space density of galaxies and show that this is a robust method, insensitive to the effects of large-scale structure. The resulting H I mass function can be fitted satisfactorily with a Schechter function with faint-end slope α=-1.30. This slope is found to be dependent on morphological type, with late-type galaxies giving steeper slopes. We extensively test various effects that potentially bias the determination of the H I mass function, including peculiar motions of galaxies, large-scale structure, selection bias, and inclination effects, and we quantify these biases. The large sample of galaxies enables an accurate measurement of the cosmological mass density of neutral gas: &UOmega;(H) I=(3.8&PLUSMN;0.6)x10(-4) h(75)(-1). Low surface brightness galaxies contribute only similar to15% to this value, consistent with previous findings MH - Australia MH - United Kingdom MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 62 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000183234100006 L2 - galaxies : ISM;galaxies : luminosity function, mass function;ISM : general;radio emission lines;surveys;DAMPED LY-ALPHA; SURFACE BRIGHTNESS GALAXIES; LIMIT ABSORPTION SYSTEMS; GAS-RICH GALAXIES; DUAL-BEAM SURVEY; LUMINOSITY FUNCTION; SPACE DENSITY; LYMAN-ALPHA; REDSHIFT SURVEY; NUMBER DENSITY SO - Astronomical Journal 2003 ;125(6):2842-2858 9930 UI - 4029 AU - Aakeroy CB AU - Desper J AU - Valdes-Martinez J AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoAakeroy, CB, Kansas State Univ, Dept Chem, Manhattan, KS 66506, USA TI - Controlling molecular and supramolecular structure of hydrogen-bonded coordination compounds AB - In order to organize and assemble a variety of octahedral coordination complexes into infinite 1-D chains of desired connectivity, dibenzoylmethane was used as a chelating, "blocking" ligand, and isonicotinamide and 4-(3-carboxamidophenyl)pyridine were employed as structure directing supramolecular reagents. Five M(II) complexes were prepared using this molecular/supramolecular synthetic strategy. The crystal structure determination of these compounds shows the same principal supramolecular motif; infinite 1-D chains. In addition, the presence of the relatively bulky phenyl groups in DBM reduces packing efficiency in this system and provides better opportunities for the construction of solvated host structures MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 23 U4 - Chemistry, Multidisciplinary;Crystallography U5 - J;Article AV - English IS - 1466-8033 UR - ISI:000224843800006 L2 - CRYSTAL-STRUCTURES; ACID; ARCHITECTURES; ASSEMBLIES; DIBENZOYLMETHANATE; STRATEGIES; REACTIVITY; POLYMERS; PATTERNS; NETWORKS SO - Crystengcomm 2004 ;6():413-418 9931 UI - 3730 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Acosta D AU - Adams DL AU - Adams M AU - Affolder T AU - Ahmed SN AU - Akimoto H AU - Akopian A AU - Albrow MG AU - Alexeev GD AU - Alton A AU - Alves GA AU - Amaral P AU - Ambrose D AU - Amendolia SR AU - Amidei D AU - Anikeev K AU - Antos J AU - Apollinari G AU - Arnoud Y AU - Arisawa T AU - Artikov A AU - Asakawa T AU - Avila C AU - Ashmanskas W AU - Atac M AU - Azfar F AU - zzi-Bacchetta P AU - Babintsev VV AU - Babukhadia L AU - Bacchetta N AU - Bachacou H AU - Bacon TC AU - Baden A AU - Badgett W AU - Baffioni S AU - Bailey MW AU - Bailey S AU - Baldin B AU - Balm PW AU - Banerjee S AU - de Barbaro P AU - Barbaro-Galtieri A AU - Barberis E AU - Baringer P AU - Barnes VE AU - Barnett BA AU - Baroiant S AU - Barone M AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bauer G AU - Bean A AU - Beaudette F AU - Bedeschi F AU - Behari S AU - Begel M AU - Belforte S AU - Bell WH AU - Bellettini G AU - Bellinger J AU - Belyaev A AU - Benjamin D AU - Bensinger J AU - Beretvas A AU - Berge JP AU - Beri SB AU - Bernardi G AU - Bertram I AU - Berryhill J AU - Besson A AU - Beuselinck R AU - Bevensee B AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Bhatti A AU - Binkley M AU - Bisello D AU - Bishai M AU - Blair RE AU - Blazey G AU - Blekman F AU - Blessing S AU - Blocker C AU - Bloom K AU - Blumenfeld B AU - Blusk SR AU - Bocci A AU - Bodek A AU - Boehnlein A AU - Bojko NI AU - Bokhari W AU - Bolla G AU - Bolshov A AU - Bolton TA AU - Bonushkin Y AU - Borcherding F AU - Bortoletto D AU - Bos K AU - Bose T AU - Boudreau J AU - Brandl A AU - Brandt A AU - van den Brink S AU - Briskin G AU - Brock R AU - Bromberg C AU - Brooijmans G AU - Bross A AU - Brozovic M AU - Bruner N AU - Brubaker E AU - Buchholz D AU - Buckley-Geer E AU - Budagov J AU - Budd HS AU - Buehler M AU - Buescher V AU - Burkett K AU - Burtovoi VS AU - Busetto G AU - Butler JM AU - Byon-Wagner A AU - Byrum KL AU - Cabrera S AU - Calafiura P AU - Campbell M AU - Canelli F AU - Carithers W AU - Carlson J AU - Carlsmith D AU - Carvalho W AU - Cassada J AU - Casey D AU - Castilla-Valdez H AU - Castro A AU - Cauz D AU - Cerri A AU - Cerrito L AU - Chakraborty D AU - Chan AW AU - Chan KM AU - Chang PS AU - Chang PT AU - Chapman J AU - Chen C AU - Chen YC AU - Cheng MT AU - Chekulaev SV AU - Chertok M AU - Chiarelli G AU - Chirikov-Zorin I AU - Chlachidze G AU - Chlebana F AU - Cho DK AU - Choi S AU - Chopra S AU - Christofek L AU - Chu ML AU - Chung JY AU - Chung WH AU - Chung YS AU - Ciobanu CI AU - Claes D AU - Clark AG AU - Clark AR AU - Coca M AU - Connolly A AU - Connolly B AU - Convery M AU - Conway J AU - Cooper J AU - Cooper WE AU - Coppage D AU - Cordelli M AU - Cranshaw J AU - Crepe-Renaudin S AU - Cronin-Hennessy D AU - Cropp R AU - Culbertson R AU - Cummings MAC AU - Cutts D AU - Dagenhart D AU - da Motta H AU - D'Auria S AU - Davis GA AU - De K AU - De Cecco S AU - DeJongh F AU - de Jong SJ AU - Dell'Agnello S AU - Dell'Orso M AU - Demarteau M AU - Demers S AU - Demina R AU - Demine P AU - Demortier L AU - Deninno M AU - Denisov D AU - Denisov SP AU - De Pedis D AU - Derwent PF AU - Desai S AU - Devlin T AU - Diehl HT AU - Diesburg M AU - Dionisi C AU - Dittmann JR AU - Dominguez A AU - Donati S AU - Done J AU - D'Onofrio M AU - Dorigo T AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Eddy N AU - Edmunds D AU - Einsweiler K AU - Ellison J AU - Elias JE AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Engels E AU - Eno S AU - Erbacher R AU - Erdmann W AU - Ermolov P AU - Eroshin OV AU - Errede D AU - Errede S AU - Estrada J AU - Eusebi R AU - Evans H AU - Evdokimov VN AU - Fan Q AU - Farrington S AU - Feild RG AU - Ferbel T AU - Fernandez JP AU - Ferretti C AU - Field RD AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilMcGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, CanadaUniv Toronto, Toronto, ON M5S 1A7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaAcad Sinica, Inst Phys, Taipei 11529, TaiwanUniv Los Andes, Bogota, ColombiaAcad Sci, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicCharles Univ, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaNatl Univ Ireland Univ Coll Dublin, Dublin 4, IrelandUniv Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, ItalyIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, ItalyUniv Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, ItalyScuola Normale Super Pisa, I-56100 Pisa, ItalyUniv Rome 1, Sez Roma, Ist Nazl Fis Nucl, I-00185 Rome, ItalyUniv Trieste, Ist Nazl Fis Nucl, Udine, ItalyHiroshima Univ, Higashihiroshima 724, JapanUniv Tsukuba, Tsukuba, Ibaraki 305, JapanOsaka City Univ, Osaka 588, JapanWaseda Univ, Tokyo 169, JapanKyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South KoreaSeoul Natl Univ, Seoul 151742, South KoreaSungkyunkwan Univ, Suwon 440746, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, SpainUniv Geneva, CH-1211 Geneva 4, SwitzerlandUniv Glasgow, Glasgow G12 8QQ, Lanark, ScotlandUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Coll London, London WC1E 6BT, EnglandUniv Oxford, Oxford OX1 3RH, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAErnest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Los Angeles, Los Angeles, CA 90024, USAUniv Calif Riverside, Riverside, CA 92521, USAUniv Calif Santa Barbara, Santa Barbara, CA 93106, USAYale Univ, New Haven, CT 06520, USAUniv Florida, Gainesville, FL 32611, USAFlorida State Univ, Tallahassee, FL 32306, USAArgonne Natl Lab, Argonne, IL 60439, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Chicago, Enrico Fermi Inst, Chicago, IL 60637, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAPurdue Univ, W Lafayette, IN 47907, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAJohns Hopkins Univ, Baltimore, MD 21218, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAHarvard Univ, Cambridge, MA 02138, USAMIT, Cambridge, MA 02139, USATufts Univ, Medford, MA 02155, USABrandeis Univ, Waltham, MA 02254, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USARutgers State Univ, Piscataway, NJ 08855, USAUniv New Mexico, Albuquerque, NM 87131, USAColumbia Univ, New York, NY 10027, USARockefeller Univ, New York, NY 10021, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USADuke Univ, Durham, NC 27708, USAOhio State Univ, Columbus, OH 43210, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USAUniv Penn, Philadelphia, PA 19104, USACarnegie Mellon Univ, Pittsburgh, PA 15213, USAUniv Pittsburgh, Pittsburgh, PA 15260, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USATexas A&M Univ, College Stn, TX 77843, USARice Univ, Houston, TX 77005, USATexas Tech Univ, Lubbock, TX 79409, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Wisconsin, Madison, WI 53706, USAHigh Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 305, JapanAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Combination of CDF and D0 results on the W boson mass and width AB - The results based on 1992-95 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron collider average M-W=80.456+/-0.059 GeV. We also report the Tevatron collider average of the directly measured W boson width Gamma(W)=2.115+/-0.105 GeV. We describe a new joint analysis of the direct W mass and width measurements. Assuming the validity of the standard model, we combine the directly measured W boson width with the width extracted from the ratio of W and Z boson leptonic partial cross sections. This combined result for the Tevatron is Gamma(W)=2.135+/-0.050 GeV. Finally, we use the measurements of the direct total W width and the leptonic branching ratio to extract the leptonic partial width Gamma(W-->enu)=224+/-13 MeV MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Spain MH - Switzerland MH - Taiwan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000225440600020 L2 - QED RADIATIVE-CORRECTIONS; UNIVERSAL MONTE-CARLO; TOP-QUARK MASS; P(P)OVER-BAR COLLISIONS; ROOT-S=1.8 TEV; COLLIDER; FERMILAB; DECAYS; PHOTOS; MODEL SO - Physical Review D 2004 ;70(9): 9932 UI - 4121 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams DL AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahmed SN AU - Ahn SH AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Autermann C AU - Avila C AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Beaudette F AU - Begel M AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besancon M AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Binder M AU - Bischoff A AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Bolton TA AU - Bonamy P AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Boswell C AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Canelli F AU - Carvalho W AU - Casey BCK AU - Casey D AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Chopra S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clark AR AU - Clement C AU - Coadou Y AU - Colling DJ AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveira Martins C AU - Dean S AU - Del Signore K AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Fein D AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Galea CF AU - Gallas E AU - Galyaev E AU - Gao M AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Geurkov G AU - Ginther G AU - Goldmann K AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Graham G AU - Grannis PD AU - Greder S AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Grinstein S AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gu W AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Hanlet P AU - Harder K AU - Hauptman JM AU - Hauser R AU - Hays C AU - Hays J AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Hou S AU - Hu Y AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Jiang Y AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Strasbourg 1, IReS, CNRS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, CNRS, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM Inst NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Observation and properties of the X(3872) decaying to J/psi pi(+)pi(-) in p(p)over-bar collisions at root s=1.96 TeV AB - We report the observation of the X(3872) in the J/psipi(+)pi(-) channel, with J/psi decaying to mu(+)mu(-), in p (p) over bar collisions at roots=1.96 TeV. Using approximately 230 pb(-1) of data collected with the Run II D0 detector, we observe 522+/-100 X(3872) candidates. The mass difference between the X(3872) state and the J/psi is measured to be 774.9+/-3.1(stat)+/-3.0(syst) MeV/c(2). We have investigated the production and decay characteristics of the X(3872) and find them to be similar to those of the psi(2S) state MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 84 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000224533300025 L2 - J/PSI SO - Physical Review Letters 2004 ;93(16): 9933 UI - 4297 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams DL AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahmed SN AU - Ahn SH AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Autermann C AU - Avila C AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Beaudette F AU - Begel M AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besancon M AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Binder M AU - Bischoff A AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Bolton TA AU - Bonamy P AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Boswell C AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Canelli F AU - Carvalho W AU - Casey BCK AU - Casey D AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Chopra S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clark AR AU - Clement C AU - Coadou Y AU - Colling DJ AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Del Signore K AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Fein D AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Galea CF AU - Gallas E AU - Galyaev E AU - Gao M AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Geurkov G AU - Ginther G AU - Goldmann K AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Graham G AU - Grannis PD AU - Greder S AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Grinstein S AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gu W AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Hanlet P AU - Harder K AU - Hauptman JM AU - Hauser R AU - Hays C AU - Hays J AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Hou S AU - Hu Y AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Jiang Y AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceIN2P3 CNRS, Accelerateur Lineaire Lab, Orsay, FranceUniv Paris 06, LPNHE, IN2P3 CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3 CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, IReS, IN2P3 CNRS, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, IN2P3 CNRS, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Eston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for doubly charged Higgs boson pair production in the decay to mu(+)mu(+)mu(-)mu(-) in p(p)over-bar collisions at root s=1.96 TeV AB - A search for pair production of doubly charged Higgs bosons in the process p (p) over bar -->H++H---->mu(+)mu(+)mu(-)mu(-) is performed with the D0 run II detector at the Fermilab Tevatron. The analysis is based on a sample of inclusive dimuon data collected at an energy of roots=1.96 TeV, corresponding to an integrated luminosity of 113 pb(-1). In the absence of a signal, 95% confidence level mass limits of M(H-L(+/-+/-))>118.4 GeV/c(2) and M(H-R(+/-+/-))>98.2 GeV/c(2) are set for left-handed and right-handed doubly charged Higgs bosons, respectively, assuming 100% branching into muon pairs MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000224211900012 L2 - STANDARD MODEL; LEPTON-NUMBER; VIOLATION; SYMMETRY; DETECTOR SO - Physical Review Letters 2004 ;93(14): 9934 UI - 4967 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kesisoglou S AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mattingly SEK AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Melnitchouk A AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Papageorgiou K AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoFOM Inst NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for new particles in the two-jet decay channel with the DO detector AB - We present the results of a search for the production of new particles decaying into two jets in (p) over barp collisions at roots=1.8 TeV, using the DO 1992-1995 data set corresponding to 109 pb(-1). We exclude at the 95% confidence level the production of excited quarks (q*) with masses below 775 GeV/c(2), the most restrictive limit to date. We also exclude standard-model-like W' (Z') bosons with masses between 300 and 800 GeV/c(2) (400 and 640 GeV/c(2)). A W-' boson with mass <786 GeV/c(2) has been excluded by previous measurements, and our lower limit is therefore the most stringent to date MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000222502900001 L2 - (P)OVER-BAR-P COLLISIONS; W-BOSONS; COLLIDER; QUARK; TEV SO - Physical Review D 2004 ;69(11): 9935 UI - 5027 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kesisoglou S AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mattingly SEK AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Melnitchouk A AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nelson S AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Oshima N AU - Padley P AU - Papageorgiou K AU - Parashar N AU - Partridge R AU - Parua N AU - Patwa A AU - Peters O AU - Petroff P AU - Piegaia R AU - Pope BG AU - Prosper HB AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for pair production of light scalar top quarks in p(p)over-bar collisions at root s=1.8 TeV AB - Using 85.2+/-3.6 pb(-1) of p (p) over bar collisions collected at roots=1.8 TeV with the D0 detector at Fermilab's Tevatron Collider, we present the results of a search for direct pair production of scalar top quarks ((t) over bar), the supersymmetric partners of the top quark. We examined events containing two or more jets and missing transverse energy, the signature of light scalar top quark decays to charm quarks and neutralinos. After selections, we observe 27 events while expecting 31.1+/-6.4 events from known standard model processes. Comparing these results to next-to-leading-order production cross sections, we exclude a significant region of (t) over tilde and neutralino phase space. In particular, we exclude the (t) over tilde mass m((t) over tilde)<122 GeV/c(2) for a neutralino mass of 45 GeV/c(2) MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000222390900008 L2 - FERMILAB TEVATRON; SUPERSYMMETRY; COLLIDER; DETECTOR; SQUARKS; PHYSICS SO - Physical Review Letters 2004 ;93(1): 9936 UI - 5325 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik Ii RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Gounder K AU - Goussiou A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothhari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Papageorgiou K AU - Parashar N AU - Partridge R AU - Parua N AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceIN2P3, CNRS, Lab Accelerateux Lineaire, Orsay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Kansas, Lawrence, KS 66045, USAInst High Energy Phys, Protvino, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for narrow t(t)over-bar resonances in p(p)over-bar collisions at root s=1.8 TeV AB - A search for narrow resonances that decay into t (t) over bar pairs has been performed using 130 pb(-1) of data in the lepton + jets channel collected by the DO detector in p (p) over bar collisions at roots=1.8 TeV. There is no significant deviation observed from the standard-model predictions at a top-quark mass of 175 GeV/c(2). We therefore present upper limits at the 95% confidence level on the product of the production cross section and branching fraction to t (t) over bar for narrow resonances as a function of the resonance mass M-X. These limits are used to exclude the existence of a leptophobic top-color particle with mass M-X<560 GeV/c(2), using a theoretical cross section for a width Gamma(X)=0.012M(X) MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000221844400011 L2 - PARTON DISTRIBUTIONS; SYMMETRY-BREAKING; PHYSICS SO - Physical Review Letters 2004 ;92(22): 9937 UI - 5407 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kesisoglou S AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mattingly SEK AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Melnitchouk A AU - Merkin A AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nelson S AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Oshima N AU - Padley P AU - Papageorgiou K AU - Parashar N AU - Partridge R AU - Parua N AU - Patwa A AU - Peters O AU - Petroff P AU - Piegaia R AD - Univ Rochester, Dept Phys & Astron, Rochester, NY 14627, USAJoint Inst Nucl Res, Dubna 141980, RussiaUniv Oklahoma, Dept Phys & Astron, Norman, OK 73019, USALab Accelerateur Lineaire, CNRS, IN2P3, F-91898 Orsay, FranceMichigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USAInst High Energy Phys, Protvino 142284, RussiaTata Inst Fundamental Res, Sch Nat Sci, Bombay 400005, Maharashtra, IndiaBrookhaven Natl Lab, Dept Phys, Upton, NY 11973, USAUniv Illinois, Dept Phys, Chicago, IL 60607, USAUniv Nijmegen, NIKHEF, NL-6500 GL Nijmegen, NetherlandsUniv Michigan, Dept Phys, Ann Arbor, MI 48109, USACtr Brasileiro Pesquisas Fis, LAFEX, BR-22290180 Rio De Janeiro, BrazilUniv Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, F-38026 Grenoble, FranceUniv Los Andes, Dept Fis, HEP Grp, Bogota, ColombiaSUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAUniv London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BW, EnglandUniv Maryland, Dept Phys, College Pk, MD 20742, USAUniv Mediterranee, CPPM, CNRS, IN2P3, F-13288 Marseille, FranceFermilab Natl Accelerator Lab, Batavia, IL 60510, USAFOM, Inst NIKHEF, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, NL-1009 DB Amsterdam, NetherlandsNortheastern Univ, Dept Phys, Boston, MA 02115, USAUniv Kansas, Dept Phys & Astron, Lawrence, KS 66045, USAUniv Paris 06, LPNHE, CNRS, IN2P3, F-75252 Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, F-75252 Paris, FranceIndiana Univ, Dept Phys, Bloomington, IN 47405, USAFlorida State Univ, Dept Phys 4350, Tallahassee, FL 32306, USAPanjab Univ, Dept Phys, Chandigarh 160014, IndiaUniv Lancaster, Dept Phys, Lancaster LA1 4YB, EnglandNo Illinois Univ, Dept Phys, De Kalb, IL 60115, USAKansas State Univ, Dept Phys, Manhattan, KS 66506, USAColumbia Univ, Dept Phys, New York, NY 10027, USAUniv Texas, Dept Phys, Arlington, TX 76019, USABrown Univ, Dept Phys, Providence, RI 02912, USANorthwestern Univ, Dept Phys & Astron, Evanston, IL 60208, USAUniv Freiburg, Inst Phys, D-79104 Freiburg, GermanyBoston Univ, Dept Phys, Boston, MA 02215, USAUniv Estado Rio de Janeiro, Inst Fis, BR-20559900 Rio De Janeiro, BrazilCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Calif Riverside, Dept Phys, Riverside, CA 92521, USAUniv Nebraska, Dept Phys & Astron, Lincoln, NE 68588, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACEA Saclay, Serv Phys Particules, DAPNIA, F-91191 Gif Sur Yvette, FranceMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaRice Univ, Bonner Nucl Lab, Houston, TX 77005, USAInst Theoret & Expt Phys, Moscow 117259, RussiaUniv Notre Dame, Dept Phys, Notre Dame, IN 46556, USALouisiana Tech Univ, Dept Phys, Ruston, LA 71272, USAUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, ArgentinaNatl Univ Ireland Univ Coll Dublin, Fac Sci, Dept Expt Phys, Dublin 4, IrelandCalif State Univ Fresno, Dept Phys, Fresno, CA 93740, USAIowa State Univ, Dept Phys, High Energy Phys Grp, Ames, IA 50011, USAUniv Virginia, Dept Phys, Charlottesville, VA 22901, USAUniv San Francisco Quito, Quito, EcuadorUniv Arizona, Dept Phys, Tucson, AZ 85721, USACharles Univ, Fac Math & Phys, Ctr Particle Phys, Inst Nucl & Particle Phys, CZ-18000 Prague 8, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, CZ-18221 Prague 8, Czech RepublicInst High Energy Phys, Beijing 100039, Peoples R ChinaLangston Univ, Dept Math, Langston, OK 73050, USAUniv Delhi, Dept Phys & Astrophys, Delhi 110007, IndiaUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Washington, Dept Phys, Seattle, WA 98195, USAEstrada, J, Univ Rochester, Dept Phys & Astron, Rochester, NY 14627, USA TI - A precision measurement of the mass of the top quark AB - The standard model of particle physics contains parameters such as particle masses - whose origins are still unknown and which cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top quark (M-t) and W boson (M-W)(1) constrain the mass of the long-hypothesized, but thus far not observed, Higgs boson. A precise measurement of Mt can therefore indicate where to look for the Higgs, and indeed whether the hypothesis of a standard model Higgs is consistent with experimental data. As top quarks are produced in pairs and decay in only about 10(-24) s into various final states, reconstructing their masses from their decay products is very challenging. Here we report a technique that extracts more information from each top-quark event and yields a greatly improved precision (of +/- 5.3 GeV/c(2)) when compared to previous measurements(2). When our new result is combined with our published measurement in a complementary decay mode(3) and with the only other measurements available(2), the new world average for M-t becomes(4) 178.0 +/- 4.3 GeV/c(2). As a result, the most likely Higgs mass increases from the experimentally excluded(5) value(6) of 96 to 117GeV/c(2), which is beyond current experimental sensitivity. The upper limit on the Higgs mass at the 95% confidence level is raised from 219 to 251 GeV/c(2) MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 82 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000221912600034 L2 - PAIR PRODUCTION; DETECTOR; EVENT SO - Nature 2004 ;429(6992):638-642 9938 UI - 6314 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Anderson EW AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis EB AU - Baringer PB AU - Barreto JB AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel MB AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Breedon R AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Coney L AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duensing S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkanta A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Eppley G AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Fein D AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genik RJ AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gordon H AU - Gounder K AU - Goussiouz A AU - Graf N AU - Grannis PD AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Khanov A AU - Kharchilava A AU - Klima B AU - Ko W AU - Kohli JM AU - Kostritskiy A AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner E AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lucotte A AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Nang F AU - Narain M AU - Narasimham S AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Olivier B AU - Oshima N AU - Padley P AU - Papageorgiou K AD - Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Accelerateur Lineaire Lab, F-91405 Orsay, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Mainz, Inst Phys, D-6500 Mainz, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Davis, Davis, CA 95616, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USABernardi, G, Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France TI - Search for 3-and 4-body decays of the scalar top quark in pp(-) collisions at root s=1.8 TeV AB - We have searched for the signature of 3- and 4-body decays of pair-produced scalar top quarks (stop) in the inclusive final state containing an electron, a muon, and significant missing transverse energy using a sample of p (p) over bar events corresponding to 108.3 pb(-1) of data collected with the D empty set detector at Fermilab. The search is done in the framework of the minimal supersymmetric standard model assuming that the neutralino (chi(1)(0)) is the lightest supersymmetric particle and is stable. No evidence for a signal is found and we derive cross-section upper limits as a function of stop ((t) over tilde) and neutralino masses in different decay scenarios leading to the blvchi(1)(0) final state. (C) 2004 Published by Elsevier B.V MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000188698300002 L2 - BOTTOM QUARKS; SUPERSYMMETRY; EXTENSION; PHYSICS SO - Physics Letters B 2004 ;581(3-4):147-155 9939 UI - 6584 AU - Abe F AU - Nagafuji S AU - Okabe H AU - Akahane H AU - Estrada-Muniz E AU - Huerta-Reyes M AU - Reyes-Chilpa R AD - Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, Fukuoka 8140180, JapanFukuoka Univ, Sch Med, Jonan Ku, Fukuoka 8140180, JapanNatl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, MexicoAbe, F, Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, 8-19-1 Nanakuma, Fukuoka 8140180, Japan TI - Trypanocidal constituents in plants 3. Leaves of Garcinia intermedia and heartwood of Calophyllum brasiliense AB - The constituents of the leaves of Garcinia intermedia and heartwood of Calophyllum brasiliense were investigated based on their trypanocidal activity against epimastigotes of Trypanosoma cruzi, the etiologic agent of Chagas' disease. As the active components, the polyisoprenylated benzophenone derivative guttiferone A and the xanthone 8-desoxygartanin were isolated along with the biflavonoids podocarpusfiavone A and amentoflavone, and friedelin from the former. Three xanthones, jacareubin, 6-deoxyjacareubin, and 1,3,5,6-tetrahydroxy-2-(3-methyl-2-butenyl)xanthone from the latter showed activity. The trypanocidal activity of these compounds against trypomastigotes, an infectious form of T cruzi, was examined as well as gossypol, berberine chloride, and harmine for comparison MH - Japan MH - Mexico|Distrito Federal PB - TOKYO: PHARMACEUTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 11 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0918-6158 UR - ISI:000187745600031 L2 - Trypanosoma cruzi;Garcinia intermedia;Calophyllum brasiliense;trypanocidal activity;Chagas' disease;Guttiferae;TRYPANOSOMA-CRUZI; XANTHONES; EXTRACTIVES; GUTTIFERAE SO - Biological & Pharmaceutical Bulletin 2004 ;27(1):141-143 9940 UI - 5287 AU - Abellanas M AU - Bose P AU - Garcia A AU - Hurtado F AU - Ramos P AU - Rivera-Campo E AU - Tejel J AD - Univ Politecn Madrid, Fac Informat, Madrid, SpainCarleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaUniv Zaragoza, Fac Ciencias, Dep Metodos Estadisticos, E-50009 Zaragoza, SpainUniv Politecn Catalunya, Dept Math Appl 2, Barcelona, SpainUniv Alcala de Henares, Dep Matemat, Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dep Matemat, Mexico City 09340, DF, MexicoAbellanas, M, Univ Politecn Madrid, Fac Informat, Madrid, Spain TI - On local transformations in plane geometric graphs embedded on small grids AB - Given two n-vertex plane graphs G(1) and G(2) embedded in the n x n grid with straight-line segments as edges, we show that with a sequence of O(n) point moves (all point moves stay within a 5n x 5n grid) and O(n(2)) edge moves, we can transform G(1) into G(2). In the case of n-vertex trees, we can perform the transformation with O(n) point and edge moves, and show this is optimal. We also study the equivalent problems in the labelled setting MH - Canada MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000221852900003 L2 - TRIANGULATIONS SO - Computational Science and Its Applications - Iccsa 2004, Pt 3 2004 ;3045():22-31 9941 UI - 5618 AU - Abraham J AU - Aglietta M AU - Aguirre IC AU - Albrow M AU - Allard D AU - Allekotte I AU - Allison P AU - Muniz JA AU - do Amaral MG AU - Ambrosio M AU - Anchordoqui L AU - Andrews R AU - Anguiano M AU - dos Anjos JC AU - Aramo C AU - Argiro S AU - Ariska K AU - Arteaga JC AU - Atulugama S AU - Ave M AU - Avila G AU - Baggio R AU - Bai X AU - Barbosa AF AU - Barbosa HMJ AU - Barnhill D AU - Barroso SLC AU - Bauleo P AU - Beatty J AU - Beau T AU - Becker KH AU - Bellido JA AU - Bello P AU - Bergmann T AU - Berman E AU - Bertou X AU - Biermann P AU - Billoir P AU - Biral R AU - Bluemer H AU - Bohacova M AU - Bollmann E AU - Bonifazi C AU - Boratav M AU - Boselli A AU - Brack J AU - Brunet JM AU - Bui-Duc H AU - Cabrera V AU - Camin DV AU - Capdevielle JN AU - Carreno A AU - Cartiglia N AU - Caruso R AU - de Carvalho LA AU - Casanova S AU - Casimiro E AU - Castellina A AU - Castro J AU - Cattaneo PW AU - Cazon L AU - Cester R AU - Chavez N AU - Cheam D AU - Chiavassa A AU - Chinellato JA AU - Chiosso M AU - Chou A AU - Chye J AU - Cillis A AU - Civit B AU - Claes D AU - Clark PDJ AU - Clay RW AU - Cohen F AU - Cordero A AU - Cordier A AU - Cormier E AU - Cotzomi J AU - Cotti U AU - Coutu S AU - Covault CE AU - Creusot A AU - Cronin JW AU - Cuautle M AU - goret-Campagne S AU - ng-Quang T AU - Da Silva P AU - Darling J AU - Darriulat P AU - Daumiller K AU - Dawson BR AU - de Bruijn L AU - De Capoa A AU - de Oliveira MAL AU - de Souza V AU - la Selva A AU - Deligny O AU - Diaz JC AU - Dobrigkeit C AU - D'Olivio JC AU - Dorofeev A AU - Dova MT AU - Dye A AU - DuVernois MA AU - Engel R AU - Epele LN AU - Eschstruth P AU - Escobar CO AU - Etchegoyen A AU - San Luis PF AU - Fauth AC AU - Fazzini N AU - Fernandez A AU - Ferrero AMJ AU - Fick B AU - Filevich A AU - Filipcic A AU - Fonte R AU - Fulgione W AU - Gamez E AU - Garcia B AU - Garcia CA AU - Geenen H AU - Gemmeke H AU - Germain-Renaud C AU - Ghia PL AU - Gibbs K AU - Giller M AU - Gitto J AU - Glass H AU - Berisso MG AU - Vitale PFG AU - Gonzalez J AU - Gonzalez J AU - Gora D AU - Goodwin A AU - Gouffon P AU - Grassi V AU - Grillo AF AU - Grunfeld C AU - Grygar J AU - Guarino F AU - Guedes G AU - Guerard C AU - Gumbsheimer R AU - Harton JL AU - Hasenbalg F AU - Heck D AU - Hernandez JM AU - Hoffer D AU - Hojvat C AU - Homola P AU - Horvat M AU - Hrabovsky M AU - Insolia A AU - Jaminion S AU - Jeronimo Y AU - Jiang L AU - Kaducak M AU - Kampert KH AU - Keilhauer B AU - Kemp E AU - Klages H AU - Kleifges M AU - Kleinfeller J AU - Knapp J AU - Kopmann A AU - Kunka N AU - Kutschera M AU - Lachaud C AU - Lapolla M AU - Letessier-Selvon A AU - Lhenry-Yvon I AU - Lloyd-Evans J AU - Lopez R AU - Aguera AL AU - Lucano M AU - Luna R AU - Ma Y AU - Mancenido ME AU - Manfredi PF AU - Manhaes L AU - Mantsch P AU - Mariazzi AG AU - Markus MJ AU - Martin G AU - Martineau O AU - Martinez J AU - Martinez N AU - Martinez O AU - Mathes HJ AU - Matthews JAJ AU - Matthews J AU - Matthiae G AU - Marques E AU - Matussek P AU - Maurin G AU - Maurizio D AU - Mazur P AU - McCauley T AU - McEwen M AU - Mcneil RR AU - Medina C AU - Medina MC AU - Medina-Tanco G AU - Melo D AU - Melocchi M AU - Menichetti E AU - Menshikov A AU - Meyer F AU - Meyhandan R AU - Meza JC AU - Miele G AU - Miller W AU - Mohammed M AU - Monnier-Ragaigne D AU - Morello C AU - Moreno E AU - Mostafa M AU - Mussa R AU - Nassini H AU - Navarra G AU - Nellen L AU - Nerling F AU - Newman-Holmes C AU - Nicotra D AU - Nigro S AU - Nitz D AU - Nogima H AU - Nosek D AU - Nunez M AU - Ohnuki T AU - Olinto A AU - Ostaptchenko S AU - Palatka M AU - Parente G AU - Parizot E AU - Pasaye EH AU - Pastrone N AU - Patel M AU - Paul T AU - Pedraza I AU - Pekala J AU - Pelayo R AU - Pepe IM AU - Perez-Lorenzana A AU - Perrone L AU - Peshman N AU - Petrera S AU - Petrinca P AU - Pham-Ngoc D AU - Pham-Trung P AU - Pierog T AU - Pisanti O AD - Univ Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, EnglandUniv Tecnol Nacl Reg Mendoza, Ciudad Mendoza, ArgentinaConsejo Nacl Invest Cient & Tecn, Ciudad Mendoza, ArgentinaUniv Turin, Sez Torino, Ist Fis Spazio Interplanetario, I-10125 Turin, ItalyUniv Turin, Dipartimento Fis Gen, I-10125 Turin, ItalyUniv Turin, Ist Nazl Fis Nucl, I-10125 Turin, ItalyFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Paris 11, Inst Phys Nucl, F-91406 Orsay, FranceCNRS, IN2P3, F-91406 Orsay, FranceCNEA, Inst Balseiro, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaPenn State Univ, Dept Phys, Davey Lab 104, University Pk, PA 16802, USAUniv Lodz, Div Expt Phys, PL-90236 Lodz, PolandUniv Fed Fluminense, BR-24210340 Niteroi, RJ, BrazilDipartimento Fis, I-80123 Naples, ItalyIst Nazl Fis Nucl, I-80123 Naples, ItalyNortheastern Univ, Dept Phys, Boston, MA 02115, USABenemerita Univ Autonoma Puebla, Puebla 72500, MexicoCtr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ, BrazilDipartimento Fis Sperimentale, I-10125 Turin, ItalyUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095, USAInst Politecn Nacl, CINVESTAV, Dept Phys, Mexico City 07000, DF, MexicoUniv Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, EnglandPierre Auger So Observ, Mendoza, ArgentinaUniv Estadual Campinas, Inst Fis, Dept Raios Cosm & Cronol, BR-13084971 Campinas, SP, BrazilColorado State Univ, Dept Phys, Ft Collins, CO 80523, USAColl France, Lab Phys Corpusculaire & Cosmol, F-75005 Paris, FranceCNRS, IN2P3, F-75005 Paris, FranceUniv Wuppertal, Fachbereich Phys, D-42119 Wuppertal, GermanyUniv Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, AustraliaForschungszentrum Karlsruhe GmbH, Inst Kernphys, D-76021 Karlsruhe, GermanyUniv Chicago, Enrico Fermi Inst, Chicago, IL 60637, USAUniv Paris 06, Lab Phys Nucl & Hautes Energies, F-75005 Paris, FranceUniv Paris 07, Lab Phys Nucl & Hautes Energies, F-75005 Paris, FranceCNRS, IN2P3, F-75005 Paris, FranceAcad Sci Czech Republ, Inst Phys, CZ-18221 Prague 8, Czech RepublicComis Nacl Energia Atom, Lab Tandar, RA-1650 Buenos Aires, DF, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1650 Buenos Aires, DF, ArgentinaUniv Colorado, Dept Phys, Boulder, CO 80309, USASo Univ, Dept Phys, Baton Rouge, LA 70813, USADipartimento Fis, I-20133 Milan, ItalyIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoDipartimento Fis, Laquila, ItalyIst Nazl Fis Nucl, Laquila, ItalyUniv Pavia, I-27100 Pavia, ItalyUniv Bergamo, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Michoacana San Nicolas Hidalgo, Morelia 58040, Michoacan, MexicoMichigan Technol Univ, Dept Phys, Houghton, MI 49931, USANatl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, IFLP, RA-1900 La Plata, ArgentinaUniv Nebraska, Dept Phys & Astron, Brace Lab 116, Lincoln, NE 68588, USAUniv Paris 11, Lab Accelerateur Lineaire, F-91408 Orsay, FranceCNRS, IN2P3, F-91408 Orsay, FranceCase Western Reserve Univ, Dept Phys, Cleveland, OH 44106, USAInst Nucl Sci & Technol, Hanoi, VietnamUniv Karlsruhe, Inst Expt Kernphys, TH, D-76128 Karlsruhe, GermanyUniv Minnesota, Sch Phys & Astron, Minneapolis, MN 55455, USACatania Univ, Dipartimento Fis, I-95129 Catania, ItalyIst Nazl Fis Nucl, I-95129 Catania, ItalyForschungszentrum Karlsruhe GmbH, Inst Prozessadetenverarbeitung & Elektron, D-76201 Karlsruhe, GermanyUniv Technol Nacl Reg San Rafael, Ciudad San Rafael, ArgentinaInst Nucl Phys, PL-31342 Krakow, PolandLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAUniv Sao Paulo, Inst Fis, Dept Fis Expt, BR-05315970 Sao Paulo, BrazilIst Nazl Fis Nucl, Lab Nazl Gran Sasso, Gran Sasso, ItalyUniv Santiago Compostela, Dept Fis Particulas, Santiago De Compostela, SpainUniv New Mexico, Dept Phys, Albuquerque, NM 87131, USAUniv Sao Paulo, Inst Astron & Geofis, BR-05508900 Sao Paulo, BrazilUniv Franche Comte, Astrophys Lab, Observ Besancon, F-25010 Besancon, FranceCNRS, INSU, F-25010 Besancon, FranceCharles Univ, Fac Math & Phys, Inst Nucl & Particle Phys, Prague, Czech RepublicUniv Fed Bahia, BR-40210340 Salvador, BA, BrazilConsejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaUniv Utah, Salt Lake City, UT 84112, USAChinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R ChinaMax Planck Inst Radioastron, D-53121 Bonn, GermanyUniv Roma Tor Vergata, I-00133 Rome, ItalyINFN Roma II, I-00133 Rome, ItalyNova Gorica Polytech, Lab Astroparticle Phys, Nova Gorica 5001, SloveniaNatl Acad Sci, La Paz, BoliviaIst Nazl Fis Nucl, I-10125 Turin, ItalyUniv Leeds, Sch Elect Engn, Inst Integrated Informat Syst, Leeds LS2 9JT, W Yorkshire, EnglandWatson, AA, Univ Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, England TI - Properties and performance of the prototype instrument for the Pierre Auger Observatory AB - Construction of the first stage of the Pierre Auger Observatory has begun. The aim of the Observatory is to collect unprecedented information about cosmic rays above 10(18) eV. The first phase of the project, the construction and operation of a prototype system, known as the engineering array, has now been completed. It has allowed all of the sub-systems that will be used in the full instrument to be tested under field conditions. In this paper, the properties and performance of these sub-systems are described and their success illustrated with descriptions of some of the events recorded thus far. (C) 2003 Elsevier B.V. All rights reserved MH - Argentina MH - Australia MH - Bolivia MH - Brazil MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Puebla MH - Peoples R China MH - Poland MH - Slovenia MH - Spain MH - USA MH - Vietnam PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 113 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000221079000005 L2 - ultra high energy cosmic rays;Auger Observatory;extensive air showers;FLUORESCENCE DETECTOR PROTOTYPE; AIR SHOWER DETECTOR; TIME-TAGGING SYSTEM; RAY ENERGY-SPECTRUM; COSMIC-RAYS; ARRAY SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2004 ;523(1-2):50-95 9942 UI - 4762 AU - Abrutis A AU - Teiserskis A AU - Garcia G AU - Kubilius V AU - Saltyte Z AU - Salciunas Z AU - Faucheux V AU - Figueras A AU - Rushworth S AD - Vilnius Univ, Dept Gen & Inorgan Chem, LT-2006 Vilnius, LithuaniaICMAB, CSI, Bellaterra, Barcelona, SpainLMGP, ENSPG, INPG, CNRS,UMR 5628, St Martin Dheres, FranceEpichem Ltd, Wirral CH62 3QF, Merseyside, EnglandUNAM, Ctr Fiz Aplicada & Technol Avanzada, Santiago De Queretaro 76000, QRO, MexicoAbrutis, A, Vilnius Univ, Dept Gen & Inorgan Chem, Naugarduko 24, LT-2006 Vilnius, Lithuania TI - Preparation of dense, ultra-thin MIEC ceramic membranes by atmospheric spray-pyrolysis technique AB - Dense ceramic mixed ionic and electronic conducting membranes have been deposited by atmospheric spray-pyrolysis technique onto porous ceramic substrates. Perovskite oxide layers, i.e. manganites La1-xSrxMnPO3 ferrites La1-xSrxFe1-y(Co,Ni)(y)O-3, gallates La1-xSrxGa1-y (Co,Ni,Fe)(y)O-3, cobaltites La1-xSrxCoO3 and related perovskites such as lanthanum nickelate La2NiO4 layers have been prepared. The structure, morphology and composition of the layers were characterised by XRD, SEM and WDS, respectively. Density and gas tightness of the layers were studied as a function of deposition process parameters, film thickness (from similar to0.5 to similar to3 mum) and preparation procedure. The presence of cracks and defects due to thermo-mechanical stresses applied during or after the preparation process were correlated with the membrane composition and the corresponding thermal expansion coefficient differences between substrates and membranes. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - France MH - Lithuania MH - Mexico|Queretaro MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical;Polymer Science U5 - J;Article AV - English IS - 0376-7388 UR - ISI:000223160200011 L2 - mixed ionic and electronic conductors;MIEC thin films;spray-pyrolysis;oxygen conducting membranes;PEROVSKITE-TYPE OXIDES; CHEMICAL-VAPOR-DEPOSITION; OXYGEN-ION TRANSPORT; INORGANIC MEMBRANES; COMPOSITE MEMBRANE; POROUS SUPPORTS; FUEL-CELLS; FABRICATION; SR; FE SO - Journal of Membrane Science 2004 ;240(1-2):113-122 9943 UI - 6185 AU - Abrutis A AU - Bartasyte A AU - Garcia G AU - Teiserskis A AU - Kubilius V AU - Saltyte Z AU - Faucheux V AU - Figueras A AU - Rushworth S AD - Vilnius State Univ, Dept Gen & Inorgan Chem, LT-2006 Vilnius, LithuaniaICMAB, CSIC, Bellaterra 08193, Barcelona, SpainINPG, UMR CNRS 5628, ENS Phys Grenoble, LMGP, St Martin Dheres, FranceEpichem Ltd, Wirral CH62 3QF, Merseyside, EnglandUNAM, Ctr Fis Aplicada & Technol Avanzada, Santiago de Queretaro 76000, QRO, MexicoAbrutis, A, Vilnius State Univ, Dept Gen & Inorgan Chem, Naugarduko 24, LT-2006 Vilnius, Lithuania TI - Metal-organic chemical vapour deposition of mixed-conducting perovskite oxide layers on monocrystalline and porous ceramic substrates AB - Perovskite oxide layers, i.e. manganites La1-x(Sr,Ca)(x)MnO3, ferrates La1-xSrxFe1-yCoyO3, gallates La1-xSrxGa1-y(Co, Ni,Fe)(y)O-3 of a thickness of 0.8-2 mum, were deposited by pulsed injection MOCVD (metal-organic chemical vapour deposition) on various monocrystalline and porous ceramic substrates. The layers were characterised by X-ray diffraction, scanning electron microscopy, wavelength dispersion spectroscopy and by electrical measurements of the total conductivity vs. temperature. Such oxides are known as mixed electronic-ionic conductors and are largely studied as materials for the fabrication of oxyg en permeable membranes. One of the aims of this work was to estimate the suitability of the pulsed injection MOCVD technique for the preparation of dense perovskite layers for their use as membranes for oxygen. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - France MH - Lithuania MH - Mexico|Queretaro MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000189087100014 L2 - oxides;coatings;deposition process;chemical vapor deposition (CVD);OXYGEN PERMEABILITY; IONIC-CONDUCTIVITY; TRANSPORT; MEMBRANES; SR; FE; NI; PERMEATION; CA SO - Thin Solid Films 2004 ;449(1-2):94-99 9944 UI - 5848 AU - Abuabara K AU - Becker D AU - Ellertson C AU - Blanchard K AU - Schiavon R AU - Garcia SG AD - Populat Council, Mexico City 04000, DF, MexicoIbis Reprod Hlth, Johannesburg, South AfricaIbis Reprod Hlth, Cambridge, MA, USAAbuabara, K, Populat Council, Panzacola 62,Int 102,Colonia Villa Coyoacan, Mexico City 04000, DF, Mexico TI - As often as needed: appropriate use of emergency contraceptive pills AB - Previous research has established that emergency contraceptive pills are safe and have the potential to reduce unintended pregnancy; however, policy makers, providers and even women themselves have expressed concern about repeat use of the method. Evidence regarding the safety, efficacy and frequency of repeat use show that the method is safe and effective, even when used multiple times. Reported rates of repeat use are actually lower than would be expected, and needed, based on the frequency of unprotected intercourse and contraceptive failure reported in most countries. Healthcare providers should encourage use of emergency contraceptive pills as a backup after recognizable failure of barrier methods or other hormonal contraceptive methods, and should expect that women may need emergency contraceptive pills multiple times during their reproductive years. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - South Africa MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Obstetrics & Gynecology U5 - J;Editorial Material AV - English IS - 0010-7824 UR - ISI:000220490300015 L2 - emergency contraception;postcoital contraception;repeat use;OVER-THE-COUNTER; HEALTH-CARE PROVIDERS; ADVANCE PROVISION; TEENAGERS; KNOWLEDGE; ATTITUDES; WOMEN SO - Contraception 2004 ;69(4):339-342 9945 UI - 4195 AU - Aca J AU - Molina A AU - Ferrer I AU - Alberti M AD - Inst Tecnol & Estudios Super Monterrey, Ctr Sistemas Integrados Manufactura, Monterrey 64849, MexicoUniv Girona, Escola Politecn Super, Girona 17071, SpainAca, J, Inst Tecnol & Estudios Super Monterrey, Ctr Sistemas Integrados Manufactura, Av Eugenio Garza Sada 2501, Monterrey 64849, Mexico TI - Experiences in product, process, and facility development: A case of study AB - Competitive advantages in the new global economy will belong to enterprises capable of develop high customized products. In order to compete, companies require adopting structured process to develop and improve their practices in Integrated Product, Process and Facility Development (IPPFD). This research project demonstrates how the methodological use of a Reference Model allows the companies to create a Particular Model to set-up successful IPPFD Processes focusing on specific issues of the company. One case study was implemented to demonstrate how the Reference Model can be used in a company to develop a New Product Development Program to redesign and improve its products MH - Mexico|Nuevo Leon MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224023100008 L2 - design product methodology;product and process modelling;concurrent design;cooperative engineering;reference model SO - Cooperative Design, Visualization, and Engineering, Proceedings 2004 ;3190():69-78 9946 UI - 795 AU - Acosta C AU - Leon VJ AU - Conrad C AU - Gonzalez R AU - Malave CO AD - Univ Americas, Dept Mech Engn, Puebla, MexicoTexas A&M Univ, Mfg & Mech Engn Technol Program, College Stn, TX, USATexas A&M Univ, Dept Commun, College Stn, TX, USATexas A&M Univ, Dwight Look Coll Engn, Recruitment & Int Program, College Stn, TX, USAAcosta, C, Univ Americas, Dept Mech Engn, Puebla, Mexico TI - Case study on culture and the implementation of manufacturing strategy in Mexico AB - Even under the best circumstances, organizational change generates resistance. When the change results from a company in one country purchasing a plant in a different country, the complexity of change management and the resistance to change increase considerably. This case analysis examines one such change effort. Initially, the effort failed because the management of the acquiring (U.S.) firm communicated ineffectively with workers in the acquired (Mexican) plant, failed to establish a reward system that encouraged acceptance of change, and ignored cultural and subcultural differences. However, management quickly learned from its mistakes and made the adjustments necessary to turn failure into success. Implications for cross-cultural change management are discussed MH - Mexico|Puebla MH - USA PB - DEARBORN: SOC MANUFACTURING ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Industrial;Engineering, Manufacturing;Operations Research & Management Science U5 - J;Article AV - English IS - 0278-6125 UR - ISI:000232763100004 L2 - global manufacturing;improvement methods;culture;NATIONAL CULTURE; ENTRY; SELF SO - Journal of Manufacturing Systems 2004 ;23(3):204-214 9947 UI - 3487 AU - Acosta P AU - Polyakov A AU - Fridman L AU - Strygin V AD - Inst Tecnol Chihuahua, Div Posgrado & Invest, Chihuahua, MexicoVoronezh State Univ, Voronezh 394693, RussiaNatl Autonomous Univ Mexico, Fac Ingn, Div Estudios Posgrado, Mexico City 04510, DF, MexicoAcosta, P, Inst Tecnol Chihuahua, Div Posgrado & Invest, Av Tecnol 2909, Chihuahua, Mexico TI - Estimation of amplitude of oscillations in sliding mode systems caused by time delay AB - Time delay does not allow realizing ideal sliding mode but implies oscillations in the state variable space. An estimation technique is developed for an upper bound of oscillation amplitude induced by bounded uncertain time delay presence MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Russia PB - TAIPEI: CHINESE AUTOMATIC CONTROL SOC RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 1561-8625 UR - ISI:000226219400007 L2 - sliding modes;variable structure systems;time delay;ROBUST STABILIZATION SO - Asian Journal of Control 2004 ;6(4):507-513 9948 UI - 5390 AU - Acosta R AU - Montanez C AU - Fuentes-Mera L AU - Gonzalez E AU - Gomez P AU - Quintero-Mora L AU - Mornet D AU - varez-Salas LM AU - Cisneros B AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Mexico City 07000, DF, MexicoInst Biol, F-34060 Montpellier 2, FranceCisneros, B, IPN, Ctr Invest & Estudios Avanzados, Dept Genet & Mol Biol, Av IPN 2508,Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Dystrophin Dp71 is required for neurite outgrowth in PC12 cells AB - To determine the role of Dp71 in neuronal cells, we generated PC 12 cell lines in which Dp71 protein levels were controlled by stable transfection with either antisense or sense constructs. Cells expressing the antisense Dp71 RNA (antisense-Dp71 cells) contained reduced amounts of the two endogenous Dp71 isoforms. Antisense-Dp71 cells exhibited a marked suppression of neurite outgrowth upon the induction with NGF or dibutyryl cyclic AMP. Early responses to NGF-induced neuronal differentiation, such as the cessation of cell division and the activation of ERK1/2 proteins, were normal in the antisense-Dp71 cells. On contrary, the induction of MAP2, a late differentiation marker, was disturbed in these cells. Additionally, the deficiency of Dp71 correlated with an altered expression of the dystrophin-associated protein complex (DAPC) members alpha and beta dystrobrevins. Our results indicate that normal expression of Dp71 is essential for neurite outgrowth in PC12 cells and constitute the first direct evidence implicating Dp71 in a neuronal function. (C) 2004 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Oncology;Cell Biology U5 - J;Article AV - English IS - 0014-4827 UR - ISI:000221729300016 L2 - PC12 cells;Dp71 function;antisense RNA;neuronal differentiation;BINDING-SITE; DIFFERENTIAL EXPRESSION; GLYCOPROTEIN COMPLEX; MUSCULAR-DYSTROPHY; CYCLIC-AMP; DMD GENE; DP71; BRAIN; LOCALIZATION; TRANSCRIPT SO - Experimental Cell Research 2004 ;296(2):265-275 9949 UI - 4776 AU - Adamczewski B AU - Bugeaud Y AU - Luca F AD - Univ Paris 11, UMR 8623, Rech Informat Lab, F-91405 Orsay, FranceUNAM, Inst Matemat, Morelia 58180, Michoacan, MexicoUniv Strasbourg 1, UFR Math, F-67084 Strasbourg, FranceAdamczewski, B, Univ Paris 11, UMR 8623, Rech Informat Lab, Bat 490, F-91405 Orsay, France TI - On the complexity of algebraic numbers AB - On the complexity of algebraic numbers. Let b greater than or equal to 2 be an integer. We prove that real numbers whose b-ary expansion satisfies some given, simple, combinatorial condition are transcendental. This implies that the b-ary expansion of any algebraic irrational number cannot be generated by a finite automaton MH - France MH - Mexico|Michoacan PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 14 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000223055500003 L2 - REAL NUMBERS; TRANSCENDENCE; SEQUENCES; EXPANSION SO - Comptes Rendus Mathematique 2004 ;339(1):11-14 9950 UI - 3804 AU - Afraimovich VS AU - Zhigulin VP AU - Rabinovich MI AD - UASLP, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoMIT, Dept Brain & Cognit Sci, Cambridge, MA 02139, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAAfraimovich, VS, UASLP, Inst Invest Comunicac Opt, A Obregon 64, San Luis Potosi 78000, Mexico TI - On the origin of reproducible sequential activity in neural circuits AB - Robustness and reproducibility of sequential spatio-temporal responses is an essential feature of many neural circuits in sensory and motor systems of animals. The most common mathematical images of dynamical regimes in neural systems are fixed points, limit cycles, chaotic attractors, and continuous attractors (attractive manifolds of neutrally stable fixed points). These are not suitable for the description of reproducible transient sequential neural dynamics. In this paper we present the concept of a stable heteroclinic sequence (SHS), which is not an attractor. SHS opens the way for understanding and modeling of transient sequential activity in neural circuits. We show that this new mathematical object can be used to describe robust and reproducible sequential neural dynamics. Using the framework of a generalized high-dimensional Lotka-Volterra model, that describes the dynamics of firing rates in an inhibitory network, we present analytical results on the existence of the SHS in the phase space of the network. With the help of numerical simulations we confirm its robustness in presence of noise in spite of the transient nature of the corresponding trajectories. Finally, by referring to several recent neurobiological experiments, we discuss possible applications of this new concept to several problems in neuroscience. (C) 2004 American Institute of Physics MH - Mexico|San Luis Potosi MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000225378600033 L2 - WINNERLESS COMPETITION; MEMORY SO - Chaos 2004 ;14(4):1123-1129 9951 UI - 5271 AU - Afraimovich VS AU - Rabinovich MI AU - Varona P AD - UASLP, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAUniv Autonoma Madrid, Dpto Ingn Informat, GNB, E-28049 Madrid, SpainAfraimovich, VS, UASLP, Inst Invest Comunicac Opt, A Obregon 64, San Luis Potosi 78000, Mexico TI - Heteroclinic contours in neural ensembles and the winnerless competition principle AB - The ability of nonlinear dynamical systems to process incoming information is a key problem of many fundamental and applied sciences. Information processing by computation with attractors (steady states, limit cycles and strange attractors) has been a subject of many publications. In this paper, we discuss a new direction in information dynamics based on neurophysiological experiments that can be applied for the explanation and prediction of many phenomena in living biological systems and for the design of new paradigms in neural computation. This new concept is the Winnerless Competition (WLC) principle. The main point of this principle is the transformation of the incoming identity or spatial inputs into identity-temporal output based on the intrinsic switching dynamics of the neural system. In the presence of stimuli the sequence of the switching, whose geometrical image in the phase space is a heteroclinic contour, uniquely depends on the incoming information. The key problem in the realization of the WLC principle is the robustness against noise and, simultaneously, the sensitivity of the switching to the incoming input. In this paper we prove two theorems about the stability of the sequential switching and give several examples of WLC networks that illustrate the coexistence of sensitivity and robustness MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 8 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Review AV - English IS - 0218-1274 UR - ISI:000222105400002 L2 - neural computation;computation with separatrices;spatio-temporal coding;heteroclinic chaos;olfaction;chaotic motor activity;MAY-LEONARD MODEL; NETWORKS; CONVECTION; TURBULENCE; BEHAVIOR; SYSTEMS; LAYER SO - International Journal of Bifurcation and Chaos 2004 ;14(4):1195-1208 9952 UI - 6028 AU - Agarwal V AU - del Rio JA AU - Malpuech G AU - Zamfirescu M AU - Kavokin A AU - Coquillat D AU - Scalbert D AU - Vladimirova M AU - Gil B AD - UAEM, Ctr Invest Ingn & Ciencias Applicadas, Cuernavaca, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Clermont Ferrand, CNRS, LASMEA, F-63177 Aubiere, FranceUniv Montpellier 2, CNRS, GES, F-34095 Montpellier, FranceAgarwal, V, UAEM, Ctr Invest Ingn & Ciencias Applicadas, Ave Univ 1001,Colonia Chamilpa,CP 62210, Cuernavaca, Morelos, Mexico TI - Photon Bloch oscillations in porous silicon optical superlattices AB - We report the first observation of oscillations of the electromagnetic field in an optical superlattice based on porous silicon. These oscillations are an optical equivalent of well-known electronic Bloch oscillations in crystals. Elementary cells of our structure are composed by microcavities whose coupling gives rise to the extended collective modes forming optical minigaps and minibands. By varying thicknesses of the cavities along the structure axis, we have created an effective electric field for photons. A very high quality factor of the confined optical state of the Wannier-Stark ladder may allow lasing in porous silicon-based superlattices MH - France MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000220055400057 L2 - MAGNETIC-FIELDS; BAND ELECTRONS; STARK-LADDER; MICROCAVITIES; DYNAMICS; SPECTRA; ARRAY SO - Physical Review Letters 2004 ;92(9): 9953 UI - 5486 AU - Ageev S AU - Jimenez R AU - Rubin LR AD - Univ Oklahoma, Dept Math, Norman, OK 73019, USABrest State Univ, Dept Math, Brest, ByelarusUniv Cuernavaca, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUNAM, Math Inst, Cuernavaca, Morelos, MexicoRubin, LR, Univ Oklahoma, Dept Math, 601 Elm Ave,Rm 423, Norman, OK 73019 USA TI - Cell-like resolutions in the strongly countable Z-dimensional case AB - Suppose that X is a nonempty compact metrizable space and X-1 subset of X-2 subset of (...) is a sequence of nonempty closed subspaces such that for each k is an element of N, dim(Z) X-k less than or equal to k < infinity. We show that there exists a compact metrizable space Z, having closed subspaces Z(1) subset of Z(2) subset of (...), and a surjective cell-like map pi : Z --> X, such that for each k is an element of N, (a) dim Z(k) less than or equal to k, (b) pi (Z(k)) = X-k, and (c) pi \ Z(k) : Z(k) --> X-k is a cell-like map. Moreover, there is a sequence A(0) subset of A(1) subset of (...) of closed subspaces of Z such that for each k, Z(k) subset of A(k), dim A(k) less than or equal to k, pi \ A(k) : A(k) --> X is surjective, and for k is an element of N, pi \ A(k) : A(k) --> X is a UVk-1-map. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Byelarus MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000221353200002 L2 - cell-like map UVk-map;resolution;dimension;cohomological dimension;integral cohomological dimension;inverse spectrum;inverse sequence;FINITE COHOMOLOGICAL DIMENSION SO - Topology and Its Applications 2004 ;140(1):5-14 9954 UI - 5458 AU - Aggarwal D AU - Ballesteros MN AU - Cabrera RM AU - Saucedo MS AU - Fernandez ML AD - Univ Connecticut, Storrs, CT 06269, USACIAD, Hermosillo, Sonora, Mexico TI - Identification of risk factors for chronic disease in a population of young children in Northern Mexico MH - Mexico|Sonora MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470700471 SO - Faseb Journal 2004 ;18(5):A856-A857 9955 UI - 6543 AU - ago-Cisneros L AU - Rodriguez-Coppola H AU - Perez-Alvarez R AU - Pereyra P AD - Fac Fis, UH, Dept Fis Aplicada, Havana, CubaUH, Fac Fis, Dept Fis Teor, Havana, CubaUAM Azcapotzalco, Dept Ciencias Bas, Mexico City, DF, MexicoDiago-Cisneros, L, Fac Fis, UH, Dept Fis Aplicada, CP 10400, Havana, Cuba TI - Interesting coupling phenomena of heavy and light holes in a (GaAs/AlAs)(n) superlattice AB - An appropriate combination of the scattering theory and the transfer matrix formalism, for the solution of a (4 X 4) Kohn-Luttinger model, allow us to study the multichannel-multiband transmission process of heavy and light holes through a (GaAs/AlAs)" superlattice. Appealing effects and interesting channel coupling phenomena, mediated by quasi-bond states, are clearly foreseen. (C) 2004 Elsevier Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000187752200012 L2 - hole tunneling;scattering theory;transfer matrix;DOUBLE-BARRIER HETEROSTRUCTURES; SEMICONDUCTOR SUPERLATTICES; APPROXIMATION SO - Microelectronics Journal 2004 ;35(1):49-51 9956 UI - 6544 AU - ago-Cisneros L AU - Pereyra P AU - Perez-Alvarez R AU - Rodriguez-Coppola H AD - Fac Fis, Dept Fis Aplicada, Havana, CubaUAM Azcapotzalco, Dept Ciencias Basicas, Mexico City, DF, MexicoFac Fis, Dept Fis Teor, Havana, CubaDiago-Cisneros, L, Fac Fis, Dept Fis Aplicada, CP 10400, Havana, Cuba TI - Symmetries in reduced KL Hamiltonians AB - Applying the well known symmetry requirements on the transfer matrices, more frequently used to study the energy spectra and the scattering properties of multiband systems, we show that the time reversal invariance and the parity symmetry in the (2 X 2) sub-spaces of the (4 x 4) Kohn-Luttinger model, taken separately, are broken as one moves away from the Brillouin Zone center. (C) 2004 Elsevier Ltd. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000187752200024 L2 - transfer matrix;time reversal;parity;conservation laws;TIME-REVERSAL SYMMETRY; HETEROJUNCTIONS; ELECTRONS; SYSTEMS SO - Microelectronics Journal 2004 ;35(1):97-98 9957 UI - 5050 AU - Agrawal S AU - Guevara M AU - Verma SP AD - Univ Rajasthan, Dept Geol, Jaipur 302004, Rajasthan, IndiaUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoGuevara, M, Univ Rajasthan, Dept Geol, Jaipur 302004, Rajasthan, India TI - Discriminant analysis applied to establisb major-element field boundaries for tectonic varieties of basic rocks AB - The statistical method of linear discriminant analysis has been applied to distinguish Pliocene to Recent basic rocks on the basis of their major-element composition. Studied basic rock suites are from four tectonic settings: island arc, continental rift, ocean island, and mid-ocean ridge. Field boundaries were derived by computing probability functions replacing the past practice of fitting lines by "eye." Highly successful discrimination diagrams have been obtained. A testing set shows that the rate of correct classification ranges from 76% to 96%, and from 80% to 92% when three and four tectonic groups are considered at a time, respectively. The high potential of this approach to identify different tectonic settings for basic rocks is only reduced by the complex tectonic history shown by a few of the compiled samples, by crustal contamination effects in some basic rock samples, and the similarities of mantle Sources tapped in different tectonic settings MH - India MH - Mexico|Morelos PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 5 U4 - Geology U5 - J;Review AV - English IS - 0020-6814 UR - ISI:000222487300001 L2 - MID-ATLANTIC RIDGE; CENTRAL ALEUTIAN ARC; RIO-GRANDE RIFT; SEGUAM VOLCANIC CENTER; OCEAN ISLAND BASALTS; EAST PACIFIC RISE; PAPUA-NEW-GUINEA; TRACE-ELEMENT; CALC-ALKALINE; FRACTIONAL CRYSTALLIZATION SO - International Geology Review 2004 ;46(7):575-594 9958 UI - 3645 AU - Agreda FM AU - Pohlan J AU - Borgman J AD - Univ Gottingen, D-3400 Gottingen, GermanyECOSUR, Chiapas 30700, MexicoUniv Bonn, Inst Gartenbauwissensch, D-53121 Bonn, GermanyHumboldt Univ, Berlin, GermanyAgreda, FM, Univ Gottingen, D-3400 Gottingen, Germany TI - Effects of the cropping intensity in maize and coffee on the weed community and soil fertility in traditional coffee areas in the Soconusco, Chiapas, Mexico AB - Effects of the cropping intensity in maize and coffee on the weed community and soil fertility in tradional coffee areas in the Soconusco, Chiapas, Mexico Chiapas is the most important coffee growing entity of Mexico. The former profitability has been destroyed due to the decline of the prices at the world coffee markets. This has a tremendous effect on the social and economic situation in the Soconusco, the most productive and extended coffee growing region (76000 ha) of Chiapas. Many growers have shifted to maize cultivation within the traditional coffee plantations. The abundance, the biomass and diversity of weeds were measured in different field trials established within maize (two, six and twelve years of monoculture) and two different coffee production systems. The results were compared with observations in two rain forest plots near the respective fields. The comprehensive design of the field trials permitted to analyse such the behaviour of the weed communities (competition effects) and the crops (growing parameters and yield) as to characterise the ecological properties of the soils (texture, soil moisture and organic matter content, pH, total N, total P, CEC, K, Ca, Mg) MH - Germany MH - Mexico|Chiapas PB - STUTTGART: EUGEN ULMER GMBH CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - German IS - 0340-8159 UR - ISI:000225651400081 L2 - coffee;maize;Mexico;weed communities;ecological cropping;soil parameters;yield SO - Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz-Journal of Plant Diseases and Protection 2004 ;():627-634 9959 UI - 6217 AU - Aguado JA AU - Quintana VH AU - Madrigal M AU - Rosehart WD AD - Univ Malaga, Dept Elect Engn, E-29013 Malaga, SpainUniv Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, CanadaEnergy Regulatory Commiss, Mexico City, DF, MexicoUniv Calgary, Dept Elect & Comp Engn, Calgary, AB T2N 1N4, CanadaAguado, JA, Univ Malaga, Dept Elect Engn, E-29013 Malaga, Spain TI - Coordinated spot market for congestion management of inter-regional electricity markets AB - The rapid growth of inter-regional trading among electricity markets requires the development of new market-oriented mechanisms for the inter-regional congestion management of such trading. In this paper, we deal with the operation of power systems consisting of several interconnected electricity markets. We propose an alternative approach to inter-regional trade that avoids the flaws of forward markets with explicit auctioning of interconnections capacities. We propose the integration of a forward market with a balancing (spot) market for inter-regional exchanges based on nodal pricing. The interaction of transmission system operators (TSOs) belonging to adjacent markets is efficiently taken into account through a decentralized optimal power flow (OPF), which is solved by interior point methods MH - Canada MH - Mexico|Distrito Federal MH - Spain PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000188951000025 L2 - congestion management;interior point methods;inter-regional trade;optimal power flow SO - Ieee Transactions on Power Systems 2004 ;19(1):180-187 9960 UI - 6083 AU - Aguilar A AU - Thompson JS AU - Calabrese D AU - Covington AM AU - Cisneros C AU - Davis VT AU - Gulley MS AU - Halka M AU - Hanstorp D AU - Sandstrom J AU - McLaughlin BM AU - Pegg DJ AD - Univ Nevada, Dept Phys, Reno, NV 89557, USASierra Coll, Dept Phys, Rocklin, CA 95677, USALake Tahoe Community Coll, S Lake Tahoe, CA 95150, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUS Mil Acad, Photon Res Ctr, West Point, NY 10996, USALos Alamos Natl Lab, LANSCE Div, Los Alamos, NM 87545, USAEmbry Riddle Aeronaut Univ, Dept Phys, Prescott, AZ 86301, USAChalmers, Dept Phys, SE-41296 Gothenburg, SwedenGothenburg Univ, SE-41296 Gothenburg, SwedenQueens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North IrelandUniv Tennessee, Dept Phys, Knoxville, TN 37996, USAAguilar, A, Natl Inst Stand & Technol, Gaithersburg, MD 20809, USA TI - Double photodetachment from the Cl- ion AB - The correlated process involving the photodetachment of two electrons from the Cl- ion has been investigated over the photon energy range 20-45 eV. In the experiment, a beam of photons from the Advanced Light Source (ALS) was collinearly merged with a counterpropagating beam of Cl- ions from a sputter ion source. The Cl+ ions produced in the interaction region were detected, and the normalized signal was used to monitor the relative cross section for the reaction. An absolute scale for the cross section was established by measuring the spatial overlap of the two beams and by determining the efficiency for collection and detection of the Cl+ ions. The overall magnitude and shape of the measured cross section for this process agrees well with an R-matrix calculation. The calculation identifies the dominant mechanism leading to the production of the Cl+ ion as being a direct nonresonant process involving the ejection of a pair of electrons from the valence shell. Less important is the indirect nonresonant process that involves the production and decay of core-excited and doubly excited states of the Cl atom in an intermediate step. Direct and indirect resonant mechanisms involving the excitation of a single 3s core electron or more than one valence electron of the Cl- ion were found to be insignificant in the energy range studied MH - Mexico|Morelos MH - United Kingdom MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000189386300070 L2 - INNER-SHELL PHOTODETACHMENT; 2-ELECTRON PHOTOIONIZATION; AUTOIONIZATION RESONANCES; ATOMIC CHLORINE; CROSS-SECTION; NEGATIVE-IONS; DETACHMENT; THRESHOLD; HE; LI SO - Physical Review A 2004 ;69(2): 9961 UI - 5597 AU - Aguilar CN AU - Cruz M AU - Rodriguez R AU - Gutierrez-Sanchez G AU - Ramirez-Coronel A AU - Augur C AD - Univ Autonoma Coahuila, Ctr Food Res, Coahuila, MexicoUniv Aix Marseille 1, Microbiol Lab, Marseille, FranceUniv Georgia, Complex Carbohydrate Res Ctr, Athens, GA 30602, USAInst Rech Dev, Marseille, FranceAguilar, CN, Univ Autonoma Coahuila, Ctr Food Res, Coahuila, Mexico TI - Catechin degradation by several fungal strains isolated from Mexican desert AB - Eleven fungal strains previously isolated from the Mexican desert were evaluated for their capacity to use catechin as carbon source in submerged cultures. At 2 g/l of catechin, all strains grew better than the control strains, Aspergillus niger Aa-20. Aspergillus niger PSH and Penicillium commune EH2 degraded 79.33% and 76.35% with degradation rates of 0.0065 and 0.0074 g/l/h, respectively, when an initial catechin concentration of 3 g/l was used. Obtained results demonstrated the potential biotechnological capacity of these fungal strains to use condensed tannins as carbon source MH - France MH - Mexico|Coahuila MH - USA PB - SEOUL: KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1017-7825 UR - ISI:000221188800034 L2 - catechin;degradation;fungal strains;submerged culture;SOLID-STATE FERMENTATION; TANNIN ACYL HYDROLASE; MICROBIAL-DEGRADATION; CONDENSED TANNINS; ORGANIC COMPOUNDS; DECOMPOSITION SO - Journal of Microbiology and Biotechnology 2004 ;14(2):426-429 9962 UI - 3623 AU - Aguilar EM AU - Bellini M AD - Univ Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoConsejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, ArgentinaUniv Mar del Plata, Fac Ciencias Exactas & Nat, Dept Fis, RA-7600 Mar Del Plata, ArgentinaAguilar, EM, Univ Michoacana San Nicolas de Hidalgo, Inst Fis & Matemat, AP 2-82, Morelia 58040, Michoacan, Mexico TI - Origin of FRW cosmology in slow-roll inflation from non-compact Kaluza-Klein theory AB - Using a recently introduced formalism we discuss slow-roll inflation from Kaluza-Klein theory without the cylinder condition. In particular, some examples corresponding to polynomic and hyperbolic phi-potentials are studied. We find that the evolution of the fifth coordinate should be determinant for both the evolution of the early inflationary universe and the quantum fluctuations MH - Argentina MH - Mexico|Michoacan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000225864400010 L2 - EXTRA DIMENSION; UNIVERSE; MODELS; FORCE; GRAVITY; MASS SO - European Physical Journal C 2004 ;38(1):123-128 9963 UI - 3625 AU - Aguilar J AU - Bencini A AU - Berni E AU - Bianchi A AU - Garcia-Espana E AU - Gil L AU - Mendoza A AU - Ruiz-Ramirez L AU - Soriano C AD - Univ Florence, Dipartimento Chim, I-50019 Sesto Fiorentino, Firenze, ItalyUniv Valencia, CMOL, Dept Quim Inorgan, Burjassot, Valencia, SpainUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, MexicoGarcia-Espana, E, Univ Florence, Dipartimento Chim, Via Lastruccia 3,Polo Sci, I-50019 Sesto Fiorentino, Firenze, Italy TI - Dinuclear Zn-II complexes of polydentate polyamines as minimalist models of hydrolytic reactions AB - The synthesis of the novel macrocycle 2,6,9,12,16-pentaaza-[17](2,9)(1,10)phenanthrolinophane (L3) is reported. Speciation studies on the systems Zn-II-L3 and Zn-II-L2 (L2 = 2,6,10,13,17,21-hexaaza[22]metacyclophane) performed in aqueous solution show the formation of mono- and dinuclear Zn-II complexes. In the two systems, the dinuclear complexes readily hydroxylate, with the hydroxo species being the main ones in solution at relatively low pH values. This feature makes these complexes promising hydrolytic agents for carboxy and phosphate esters. The hydrolytic ability of the L1-L3 dinuclear complexes toward the carboxy and phosphate ester bond was tested by addition of p-nitrophenyl acetate (NA) and bis(p-nitrophenyl)phosphate (BNP). While in the case of NA the cleavage takes place through a simple bimolecular mechanism and the hydrolysis rate depends on MH - Italy MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000225781600014 L2 - enzyme models;hydrolysis;macrocycles;N ligands;NMR spectroscopy;zinc;PHENANTHROLINE-CONTAINING MACROCYCLES; ZINC(II) COMPLEX; ZN(II) COMPLEXES; METAL-ION; ESTER HYDROLYSIS; PHOSPHATE-ESTERS; AQUEOUS-SOLUTION; CLEAVAGE; ENZYMES; COORDINATION SO - European Journal of Inorganic Chemistry 2004 ;(20):4061-4071 9964 UI - 6413 AU - Aguilar JC AU - Chen Y AD - Inst Technol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, MexicoNYU, Courant Inst Math Sci, New York, NY 10012, USAAguilar, JC, Inst Technol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, Mexico TI - A high-order, fast algorithm for scattering calculation in two dimensions AB - We present a high-order, fast, iterative solver for the direct scattering calculation for the Helmholtz equation in two dimensions. Our algorithm solves the scattering problem formulated as the Lippmann-Schwinger integral equation for compactly supported, smoothly vanishing scatterers. There are two main components to this algorithm. First, the integral equation is discretized with quadratures based on high-order corrected trapezoidal rules for the logarithmic singularity present in the kernel of the integral equation. Second, on the uniform mesh required for the trapezoidal rule we rewrite the discretized integral operator as a composition of two linear operators: a discrete convolution followed by a diagonal multiplication; therefore, the application of these operators to an arbitrary vector, required by an iterative method for the solution of the discretized linear system, will cost N(2)log(N) for a N-by-N mesh, with the help of FFT. We will demonstrate the performance of the algorithm for scatterers of complex structures and at large wave numbers. For numerical implementations, CMRES iterations will be used, and corrected trapezoidal rules up to order 20 will be tested. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Mathematics, Applied U5 - J;Article AV - English IS - 0898-1221 UR - ISI:000188396000001 L2 - integral equation;large wave numbers;quadrature rules;logarithmic singularity;correction coefficients;HUYGENS EQUIVALENCE PRINCIPLE; TRAPEZOIDAL QUADRATURE-RULES; VOLUME INTEGRAL-EQUATION; SOLVER SO - Computers & Mathematics with Applications 2004 ;47(1):1-11 9965 UI - 3316 AU - Aguilar JEM AU - Bellini M AD - Univ Michoacana, Inst Fis & Matemat, Morelia 58240, Michoacan, MexicoUniv Mar del Plata, Fac Ciencias Exactas & Nat, Dept Fis, RA-7600 Mar Del Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-7600 Mar Del Plata, ArgentinaAguilar, JEM, Univ Michoacana, Inst Fis & Matemat, AP-2-82,58040, Morelia 58240, Michoacan, Mexico TI - The evolution of the universe from non-compact Kaluza-Klein theory AB - We develop a 5D mechanism, inspired by Campbell's theorem, to explain the (neutral scalar field governed) evolution of the universe from an initially inflationary expansion that has a change of phase towards a decelerated expansion and thereafter evolves towards the present day observed accelerated (quintessential) expansion MH - Argentina MH - Mexico|Michoacan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 8 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000226552100011 L2 - ENERGY-MOMENTUM TENSOR; EQUATION-OF-STATE; COSMOLOGICAL CONSTANT; INFLATION; SYMMETRY; GRAVITY SO - European Physical Journal C 2004 ;38(3):367-371 9966 UI - 4745 AU - Aguilar JEM AU - Bellini M AD - Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Nacl Mar del Plata, CONICET, RA-7600 Mar Del Plata, ArgentinaUniv Nacl Mar del Plata, Fac Ciencias Exactas & Nat, Dept Fis, Mar Del Plata 7600, ArgentinaAguilar, JEM, Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, AP 2-82, Morelia 58040, Michoacan, Mexico TI - Noncompact Kaluza-Klein theory and inflationary cosmology: a complete formalism AB - A formalization of the recently introduced formalism for inflation is developed from a noncompact Kaluza-Klein theory. In particular, the case for a single scalar field inflationary model is studied. We obtain that the scalar potential, which assume different representations in different frames, has a geometrical origin. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000223122600015 L2 - UNIVERSE; DIMENSIONS; MODELS; TEV SO - Physics Letters B 2004 ;596(1-2):116-122 9967 UI - 6133 AU - Aguilar JP AU - Berggren WA AU - Aubry MP AU - Kent DV AU - Clauzon G AU - Benammi M AU - Michaux J AD - Univ Montpellier 2, CNRS, UMR 5554, IEPHE, F-34095 Montpellier 5, FranceUniv Montpellier 2, CNRS, UMR 5554, Inst Sci Evolut, F-34095 Montpellier, FranceWoods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543, USARutgers State Univ, Dept Geol Sci, Piscataway, NJ 08854, USALamont Doherty Earth Observ, Palisades, NY 10964, USACEREGE, CNRS, UMR 6635, F-13545 Aix En Provence 04, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnetismo, Mexico City 04510, DF, MexicoMichaux, J, Univ Montpellier 2, CNRS, UMR 5554, IEPHE, CC 064, F-34095 Montpellier 5, France TI - Mid-Neogene Mediterranean marine-continental correlations: an alternative interpretation AB - Recent revised magnetostratigraphic and astrochronologic calibrations of several calcareous planktonic microfossil datum events (in particular Coccolithus miopelagicus and Neogloboquadrina acostaensis) combined with our magnetobiostratigraphic investigation of a 10 m-thick section at Ecotet, near Lyon (France), in which terrestrial micromammals (Vallesian Zone MN9) are intercalated with calcareous nannoplankton and planktonic foraminifera belonging to Zones NN6-N-N8 and N14-15 (=M11 and M12), respectively, lead us to question the recent recalibration by Krijgsman et al. [(1996) Eart Planet. Sci. Lett. 142, 367-380) of the Aragonian/Vallesian (MN7-8/MN9) boundary with Chron C5r.1r (similar to 11.1 Ma) and the lower/upper Vallesian (MN9/10) boundary with Chron C4Ar.2n (similar to9.6-9.7 Ma). Ecotet, with a uniform reverse polarity, is shown to be assignable uniquely to Chron C5r. Interregional correlation of Ecotet with Mediterranean terrestrial stratigraphies indicates that Progonomys (whose First Occurrence (FO) has been traditionally placed in Mediterranean Mammal Zone MN10) was already present in Mediterranean Zone MN9 at similar to 11.4 Ma and did not experience a 2 million-year delay in its putative prochoresis from Asia. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Geography, Physical;Geosciences, Multidisciplinary;Paleontology U5 - J;Article AV - English IS - 0031-0182 UR - ISI:000189092900009 L2 - Neogene;Mediterranean;mammals;biostratigraphy;paleomagnetic stratigraphy;LATE MIOCENE; SERRAVALLIAN/TORTONIAN BOUNDARY; NORTH-ATLANTIC; MAGNETOSTRATIGRAPHY; BIOSTRATIGRAPHY; CALIBRATION; CHRONOLOGY; SCALE; SPAIN; AGE SO - Palaeogeography Palaeoclimatology Palaeoecology 2004 ;204(1-2):165-186 9968 UI - 5596 AU - Aguilar LMA AU - De Almeida NG AU - Villas-Boas CJ AD - Univ Catolica Goias, Dept Matemat & Fis, BR-74605010 Goiania, Go, BrazilUniv Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, BrazilAguilar, LMA, Loma Bosque 115, Leon 37150, Gto, Mexico TI - The harmonic oscillator interacting with a heat bath AB - We show that the harmonic oscillator linearly coupled with a heat bath has a serious defect, even in the case of conserving the rotating terms in the interaction Hamiltonian, i.e. without the rotating wave approximation MH - Brazil MH - Mexico|Guanajuato PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000221185600041 SO - Journal of Modern Optics 2004 ;51(6-7):1091-1092 9969 UI - 6296 AU - Aguilar R AU - Davila MM AU - Elizalde MP AU - Mattusch J AU - Wennrich R AD - Univ Autonoma Puebla, Fac Ciencias Quim, Puebla 72571, Pue, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72571, Pue, MexicoUniv Autonoma Puebla, Ctr Quim, Puebla 72571, Pue, MexicoCtr Environm Res Leipzig Halle, Dept Analyt Chem, D-04318 Leipzig, GermanyDavila, MM, Univ Autonoma Puebla, Fac Ciencias Quim, Apdo Postal J-55, Puebla 72571, Pue, Mexico TI - Capability of a carbon-polyvinylchloride composite electrode for the detection of dopamine, ascorbic acid and uric acid AB - In this work, the composite carbon-polyvinylchloride (C-PVC) was used as an electrode for the detection of dopamine, ascorbic acid, uric acid and their mixtures by differential pulse voltammetry (DPV). The results showed that the untreated C-PVC electrode was selective and stable for the oxidation of dopamine in a mixture containing uric acid and an excess of ascorbic acid in acidic medium. The pre-treated C-PVC electrode in a neutral medium exhibited good resolution of the mixture components in the micro molar concentration range of DA. The ageing of the C-PVC electrode during longer time periods did not affect the peak potential and the detection of dopamine, uric acid and ascorbic acid in 0.1 M H2SO4. The practical analytical utility of the C-PVC electrode was demonstrated by the measurement of uric acid in human urine and serum samples without any preliminary pre-treatment. (C) 2003 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 42 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000188869100002 L2 - differential pulse voltammetry;carbon paste electrode;dopamine;ascorbic acid;uric acid;PERFORMANCE LIQUID-CHROMATOGRAPHY; POWDER MICROELECTRODE TECHNIQUE; GLASSY-CARBON; STRIPPING VOLTAMMETRY; PHENOLIC-COMPOUNDS; ACTIVATION; OXIDATION; SAMPLES SO - Electrochimica Acta 2004 ;49(6):851-859 9970 UI - 5563 AU - Aguirre AH AU - Riondal SB AU - Coello CAC AU - Lizarraga GL AU - Montes EM AD - CIMAT, Ctr Res Math, Dept Comp Sci, Guanajuato 36240, Gto, MexicoCINVESTAV, IPN, Evolutionary Computat Grp, Dept Ingn Elect,Secc Computac, Mexico City 07300, DF, MexicoCoello, CAC, POB 60326-394, Houston, TX 77205, USA TI - Handling constraints using multiobjective optimization concepts AB - In this paper, we propose a new constraint-handling technique for evolutionary algorithms which we call inverted-shrinkable PAES (IS-PAES). This approach combines the use of multiobjective optimization concepts with a mechanism that focuses the search effort onto specific areas of the feasible region by shrinking the constrained search space. IS-PAES also uses an adaptive grid to store the solutions found, but has a more efficient memory-management scheme than its ancestor (the Pareto archived evolution strategy for multiobjective optimization). The proposed approach is validated using several examples taken from the standard evolutionary and engineering optimization literature. Comparisons are provided with respect to the stochastic ranking method (one of the most competitive constraint-handling approaches used with evolutionary algorithms currently available) and with respect to other four multiobjective-based constraint-handling techniques. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 13 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0029-5981 UR - ISI:000221236200002 L2 - evolutionary algorithms;constraint-handling;evolutionary multiobjective optimization;evolutionary optimization;GENETIC ALGORITHMS; EVOLUTIONARY OPTIMIZATION; STRUCTURAL OPTIMIZATION; DESIGN OPTIMIZATION SO - International Journal for Numerical Methods in Engineering 2004 ;59(15):1989-2017 9971 UI - 5089 AU - Aguirre LHS AU - Reza-Lopez S AU - Levario-Carrillo M AD - Univ Autonoma Chihuahua, Fac Enfermeria & Nutriol, Chihuahua 31250, MexicoInst Mexicano Seguro Social, Chihuahua, MexicoUniv Toronto, Fac Med, Dept Publ Hlth Sci, Toronto, ON, CanadaReza-Lopez, S, Univ Autonoma Chihuahua, Fac Enfermeria & Nutriol, Ave Politecn Nacl 2714,Colonia Quintas Sol, Chihuahua 31250, Mexico TI - Relation between maternal body composition and birth weight AB - In order to establish the relationship between maternal body composition indicators (fat-free mass, fat mass, total body water) and birth weight, a cross-sectional study was designed, based on 196 pairs of mothers and live singleton newborns with gestational age of 37 weeks or more. Immediately after delivery, the mothers were interviewed to obtain information about different birth weight predictors. An analysis of maternal body composition through bioelectric impedance was held. Multiple linear regression was used to measure the effect of each variable on birth weight. The birth weight mean was 3,251 B 514 g. Maternal height was 160.44 +/- 6.3 cm, total net weight gain was 5.85 +/- 5.15 kg, fat mass consisted of 15.84 +/- 6.72 kg, and fat-free mass was 50.42 +/- 7.65 kg; total body water was 34.82 +/- 5.61 liters. The model which included total body water and all predictors found to be associated with birth weight in the bivariate analysis ( maternal age, gestational age, gender, placenta weight, and placenta weight squared) was found to be the best in explaining the variability of birth weight (R-2 = 45.26%). Fat mass was an important predictor only in the subgroup of women within the low tertile of body mass index. In conclusion, fat-free mass and total body water explained a major proportion of the variability of birth weight in comparison with the mother's weight gain during the pregnancy period, which has already been considered an important predictor of birth weight. Copyright (C) 2004 S. Karger AG, Basel MH - Canada MH - Mexico|Chihuahua PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 2 U4 - Pediatrics U5 - J;Article AV - English IS - 0006-3126 UR - ISI:000222387700010 L2 - birth weight;bioelectric impedance;body composition;BIOELECTRICAL-IMPEDANCE ANALYSIS; FAT-FREE MASS; FETAL GROWTH; PREGNANCY; WATER; DETERMINANTS; NUTRITION; DISEASE; WOMEN; INDEX SO - Biology of the Neonate 2004 ;86(1):55-62 9972 UI - 5489 AU - Aguirre NM AU - Passian A AU - Perez LM AU - Lopez-Sandoval E AU - Vazquez-Lopez C AU - Jimenez-Perez JL AU - Ferrell TL AD - Oak Ridge Natl Lab, Oak Ridge, TN 37831, USACINVESTAV, IPN, Dept Fis, Mexico City 07000, DF, MexicoCICATA, IPN, Mexico City 11500, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoAguirre, NM, Oak Ridge Natl Lab, Bethel Valley Rd, Oak Ridge, TN 37831 USA TI - The use of the surface plasmons resonance sensor in the study of the influence of "allotropic" cells on water AB - A study of the dielectric function changes of water induced by a device known as "allotropic" cell is presented. Changes of the dielectric function in distilled water and ultrapure water were quantified, using surface plasmons resonance (SPR) on gold islands. An increment in the value of the dielectric function of "allotropized" water with respect to that of non-treated water was measured. Such increment is larger when water is heated and stirred during the treatment. (C) 2003 Published by Elsevier B.V MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Analytical;Electrochemistry;Instruments & Instrumentation U5 - J;Article AV - English IS - 0925-4005 UR - ISI:000221398700022 L2 - SPR sensor;"allotropized" water;water;dielectric function;REFRACTIVE-INDEX; ISLAND FILMS; SPHEROIDS; PARTICLES; SUBSTRATE; SPECTRA SO - Sensors and Actuators B-Chemical 2004 ;99(1):149-155 9973 UI - 4968 AU - Ahilan K AU - Bennett MC AU - Aronson MC AU - Anderson NE AU - Canfield PC AU - Munoz-Sandoval E AU - Gortenmulder T AU - Hendrikx R AU - Mydosh JA AD - Univ Michigan, Ann Arbor, MI 48109, USAIowa State Univ, Ames Lab, Ames, IA 50011, USALeiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, NetherlandsIPICyT, Adv Mat Dept, San Luis Potosi 78231, MexicoMax Planck Inst Chem Phys Solids, Dresden, GermanyAhilan, K, Univ Michigan, Ann Arbor, MI 48109, USA TI - Magnetotransport in single-crystal half-Heusler compounds AB - We present the results of electrical resistivity and Hall effect measurements on single crystals of HfNiSn, TiPtSn, and TiNiSn. Semiconducting behavior is observed in each case, involving the transport of a small number of highly compensated carriers. Magnetization measurements suggest that impurities and site disorder create both localized magnetic moments and extended paramagnetic states, with the susceptibility of the latter increasing strongly with reduced temperature. The magnetoresistance is sublinear or linear in fields ranging from 0.01-9 T at the lowest temperatures. As the temperature increases, the normal quadratic magnetoresistance is regained, initially at low fields, and at the highest temperatures extending over the complete range of fields. The origin of the vanishingly small field scale implied by these measurements remains unknown, presenting a challenge to existing classical and quantum mechanical theories of magnetoresistance MH - Germany MH - Mexico|San Luis Potosi MH - Netherlands MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000222531800031 L2 - INTERMETALLIC COMPOUNDS; THERMOELECTRIC-MATERIALS; MAGNETIC-PROPERTIES; FERMI-LEVEL; MAGNETORESISTANCE; GAP; ZRNISN; TINISN; SEMICONDUCTOR; ELECTRON SO - Physical Review B 2004 ;69(24): 9974 UI - 5993 AU - Airod A AU - Petrov R AU - Colas R AU - Houbaert Y AD - State Univ Ghent, Dept Met & Mat Sci, B-9052 Ghent, BelgiumUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza, NL, MexicoAirod, A, State Univ Ghent, Dept Met & Mat Sci, Technol Pk 903, B-9052 Ghent, Belgium TI - Analysis of the trip effect by means of axisymmetric compressive tests on a Si-Mn bearing steel AB - Analysis of the TRIP-effect has been implemented by means of series of axisymmetric compressive tests on a Si-Mn bearing TRIP-assisted steel heat treated to vary the amount of retained austenite from 5.70 to 9.11 %. The cylindrical samples were deformed with true strains of 0.25, 0.5 and 1, and constant strain rate of 0.1 s(-1) at room temperature. Microstructural examination of the samples indicates that most of the deformation is sustained by the weakest phase, ferrite. The stress-strain data was fitted to different constitutive equations to evaluate the point at which the TRIP-effect triggers. The results showed that the amount of retained austenite is reduced with the increase of strain. No complete transformation of austenite was found to occur as a fraction of austenite remains untransformed even at equivalent strains as high as one. The behaviour of samples with different amounts of retained austenite, but of equal carbon content, was found to depend on the volume fraction of this structure. It was found that the TRIP-effect was triggered at lower strains, but higher stresses, as the amount of this phase increased MH - Belgium MH - Mexico|Nuevo Leon PB - TOKYO: IRON STEEL INST JAPAN KEIDANREN KAIKAN RP - NOT IN FILE U3 - TC 2 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0915-1559 UR - ISI:000220206500023 L2 - axisymmetric compression;constitutive equations;TRIP steels;microstructure;retained austenite;TRANSFORMATION; PLASTICITY; STABILITY; AUSTENITE; ALUMINUM; PHASES SO - Isij International 2004 ;44(1):179-186 9975 UI - 6112 AU - Akerman CJ AU - Carigi L AU - Nissen PE AU - Pettini M AU - Asplund M AD - Univ Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoAarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, DenmarkAustralian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaAkerman, CJ, Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England TI - The evolution of the C/O ratio in metal-poor halo stars AB - We report new measurements of carbon and oxygen abundances in 34 F and G dwarf and subgiant stars belonging to the halo population and spanning a range of metallicity from [Fe/H] = -0.7 to -3.2. The survey is based on observations of four permitted lines of CI near 9100 Angstrom and the OI lambda7774 triplet, all recorded at high signal-to-noise ratios with the UVES echelle spectrograph on the ESO VLT. The line equivalent widths were analysed with the 1D, LTE, MARCS model atmosphere code to deduce C and O abundances; corrections due to non-LTE and 3D effects are discussed. When combined with similar published data for disk stars, our results confirm the metallicity dependence of the C/O ratio known from previous stellar and interstellar studies: C/O drops by a factor of similar to3-4 as O/H decreases from solar to similar to1/10 solar. Analysed within the context of standard models for the chemical evolution of the solar vicinity, this drop results from the metallicity dependence of the C yields from massive stars with mass loss, augmented by the delayed release of C from stars of low and intermediate mass. The former is, however, always the dominant factor. Our survey has also uncovered tentative evidence to suggest that, as the oxygen abundance decreases below [O/H] = -1, [C/O] may not remain constant at [C/O] = -0.5, as previously thought, but increase again, possibly approaching near-solar values at the lowest metallicities ([O/H] less than or similar to -3). With the current dataset this is no more than a 3sigma effect and it may be due to metallicity-dependent non-LTE corrections to the [C/O] ratio which have not been taken into account. However, its potential importance as a window on the nucleosynthesis by Population III stars is a strong incentive for future work, both observational and theoretical, to verify its reality MH - Australia MH - Denmark MH - United Kingdom MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 46 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000189377200020 L2 - stars : abundances;Galaxy : abundances;Galaxy : evolution;Galaxy : halo;SOLAR-TYPE STARS; OXYGEN ABUNDANCES; STELLAR EVOLUTION; LINE FORMATION; CHEMICAL-COMPOSITION; MODEL ATMOSPHERES; POPULATION-III; GALACTIC DISC; MASSIVE STARS; MAIN-SEQUENCE SO - Astronomy & Astrophysics 2004 ;414(3):931-942 9976 UI - 5277 AU - Akiyama J AU - Hurtado F AU - Merino C AU - Urrutia J AD - Tokai Univ, Shibuya Ku, Tokyo 1510063, JapanUniv Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoAkiyama, J, Tokai Univ, Shibuya Ku, 2-28-4 Tomigaya, Tokyo 1510063, Japan TI - A problem on hinged dissections with colours AB - We examine the following problem. Given a square C we want a hinged dissection of C into congruent squares and a colouring of the edges of these smaller squares with k colours such that we can transform the original square into another with its perimeter coloured with colour i, for all i in {1,...k}. We have the restriction that the moves have to be realizable in the plane, so when swinging the pieces no overlappings are allowed. We show a solution for k colours that uses p(2) pieces, with p an even number and at least 2k + 2rootk(2)-k, this by using a necklace made of the p(2) pieces and an ingenious way to wrap it into a square MH - Japan MH - Mexico|Distrito Federal MH - Spain PB - TOKYO: SPRINGER TOKYO RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0911-0119 UR - ISI:000221884700001 L2 - POLYHEDRA; LINKAGES SO - Graphs and Combinatorics 2004 ;20(2):145-159 9977 UI - 5082 AU - Akourki A AU - Gil L AU - Echegaray A AU - Espinosa E AU - Josal A AU - de Blas I AU - Gonzalez N AU - de la Hoya MG AU - Meque LC AD - Univ Zaragoza, Dept Patol Anim Reprod, Zaragoza 50013, SpainUniv Juarez Estado de Durango, Fac Med Vet & Zootecnia, Durango 34000, MexicoEmpresa Magapor SL, Zaragoza 50600, SpainGil, L, Univ Zaragoza, Dept Patol Anim Reprod, C Miguel Servet 177, Zaragoza 50013, Spain TI - Effect of the extender supplement Equex-STM on cryopreserved semen in the Assaf sheep AB - This study was designed to evaluate the effect of adding the detergent Equex-STM to the extender used to dilute semen for cryopreservation on several indicators of sperm preservation. Two consecutive ejaculates per day were obtained from 5 Assaf sheep on two days out of every week over three alternate months. The freezing protocol involved diluting the semen in Fiser's extender, to which 0.7 % Equex-STM was added or omitted before cryopreserving the semen in straws by exposure to nitrogen vapor. Equex-STM supplementation gave rise to significantly (p<0.05) improved sperm quality variables after different periods of freezing (0 hours, 1 week and 1 month). The variables examined were: individual motility, viability, acrosome integrity, plasma membrane integrity (HOS test) and morphological anomalies. This improvement was independent of the ram and month of testing. In a second experiment in which we incubated the semen (0 and 6 hours) at 37&DEG;C after thawing, Equex-STM also showed a beneficial effect on sperm quality MH - Mexico|Durango MH - Spain PB - LONDON: CRYO LETTERS RP - NOT IN FILE U3 - TC 0 U4 - Biology;Physiology U5 - J;Article AV - English IS - 0143-2044 UR - ISI:000221643700008 L2 - Assaf sheep;semen;Equex-STM;extender;cryopreservation;ORVUS ES PASTE; RAM SPERMATOZOA; DOG SPERMATOZOA; EGG-YOLK; ACROSOMAL INTEGRITY; POSTTHAW SURVIVAL; FROZEN; SPERM; DILUENTS; MOTILITY SO - Cryoletters 2004 ;25(2):147-154 9978 UI - 3935 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham A AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kruger K AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Paramonov A AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - ETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandDESY, Zeuthen, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Rechenzentrum, Wuppertal, GermanyPaul Scherrer Inst, Villigen, SwitzerlandUniv Rome, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyCharles Univ, Fac Math & Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceEcole Polytech, CNRS, LLR, IN2P3, F-91128 Palaiseau, FranceUniv Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, FranceMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyPN Lebedev Phys Inst, Moscow 117924, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandLund Univ, Dept Phys, Lund, SwedenUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv Lancaster, Dept Phys, Lancaster, EnglandSlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Kiel, Inst Expt & Angewandte Phys, Kiel, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyDESY, D-2000 Hamburg, GermanyCEA, DSM, DAPNIA, Gif Sur Yvette, FranceJoint Inst Nucl Res, Dubna, RussiaUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyInst Nucl Phys, Krakow, PolandRutherford Appleton Lab, Chilton, Didcot, EnglandUniv Antwerp, B-2020 Antwerp, BelgiumFree Univ Brussels, Inter Univ Inst High Energies, ULB VUB, Brussels, BelgiumUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyCERN, Geneva, SwitzerlandUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanySafarik Univ, Kosice 04154, SlovakiaNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceNewman, PR, ETH, Inst Teilchenphys, Zurich, Switzerland TI - A general search for new phenomena in ep scattering at HERA AB - A model-independent search for deviations from the Standard Model prediction is performed in e(+) p and e(-) p collisions at HERA using H1 data corresponding to an integrated luminosity of 117 pb(-1). For the first time all event topologies involving isolated electrons, photons, muons, neutrinos and jets with high transverse momenta are investigated in a single analysis. Events are assigned to exclusive classes according to their final state. A statistical algorithm is developed to search for deviations from the Standard Model in the distributions of the scalar sum of transverse momenta or invariant mass of final state particles and to quantify their significance. A good agreement with the Standard Model prediction is observed in most of the event classes. The most significant deviation is found for a topology containing an isolated muon, missing transverse momentum and a jet, consistent with a previously reported observation. (C) 2004 Elsevier B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000224926500003 L2 - HADRON-HADRON COLLISIONS; CROSS-SECTIONS; CALORIMETER; PHOTOPRODUCTION; BOSONS; MODEL SO - Physics Letters B 2004 ;602(1-2):14-30 9979 UI - 4147 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Chyla J AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmanne M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti L AU - Formanek J AU - Ranke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz I AU - Milstead D AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer M AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, DAPNIA, DSM, CEA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LLR, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Measurement of dijet production at low Q(2) at HERA AB - Triple differential dijet cross sections in e(+/-)p interactions are presented in the region of photon virtualities 2 < Q(2) < 80 GeV2, inelasticities 0.1 < y < 0.85, jet transverse energies E*(T1) > 7GeV, E*(T2) > 5 GeV, and pseudorapidities - 2.5 < η(1)*, η(2)* < 0. The measurements are made in the gamma*p centre-of-mass frame, using an integrated luminosity of 57 pb(-1). The data are compared with NLO QCD calculations and LO Monte Carlo programs with and without a resolved virtual photon contribution. NLO QCD calculations fail to describe the region of low Q(2) and low jet transverse energies, in contrast to a LO Monte Carlo generator which includes direct and resolved photon interactions with both transversely and longitudinally polarised photons. Initial and final state parton showers are tested as a mechanism for including higher order QCD effects in low E-T jet production MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 6 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000224639600002 L2 - JET CROSS-SECTIONS; DEEP-INELASTIC SCATTERING; MONTE-CARLO GENERATOR; LEAD/SCINTILLATING-FIBER CALORIMETER; LIQUID ARGON CALORIMETER; PHYSICS EVENT GENERATION; GAMMA-P INTERACTIONS; VIRTUAL PHOTONS; PERTURBATION-THEORY; EP COLLISIONS SO - European Physical Journal C 2004 ;37(2):141-159 9980 UI - 4216 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Contreras JG AU - Coppens Y AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PM AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail A AU - Jacquet A AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kruger K AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Martisikova M AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Paramonov A AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow R AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, EnglandFree Univ Brussels, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, PNIA, DSM, F-91191 Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, FranceEcole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPHNE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPHNE, Paris, FranceAcad Sci Czech Republic, Inst Phys, Prague, Czech RepublicCharles Univ Prague, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dept Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, CH-8006 Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanySafarik Univ, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandAktas, A, DESY, D-2000 Hamburg, Germany TI - Search for bosonic stop decays in R-parity violating supersymmetry in e(+)p collisions at HERA AB - A search for scalar top quarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA using the H1 detector. The data, taken at roots = 319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb(-1). The resonant production of scalar top quarks t in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay t --> BW. The R-parity violating decay of the sbottom quark b --> dv(e) and leptonic and hadronic W decays are considered. No evidence for stop production is found in the search for bosonic stop decays nor in a search for the direct R-parity violating decay t --> eq. Mass dependent limits on lambda' are obtained in the framework of the minimal supersymmetric Standard Model. Stop quarks with masses up to 275 GeV can be excluded at the 95% confidence level for a Yukawa coupling of electromagnetic strength. (C) 2004 Elsevier B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000224217600004 L2 - CURRENT CROSS-SECTIONS; ENERGY EP COLLISIONS; HADRON-COLLISIONS; EVENT GENERATOR; QCD ANALYSIS; PHYSICS; MODEL; CALORIMETER; MOMENTUM SO - Physics Letters B 2004 ;599(3-4):159-172 9981 UI - 4367 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Ratiani Z AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - Rhein Westfal TH Aachen, Phys Inst 1, Aachen, GermanyRhein Westfal TH Aachen, Phys Inst 3, Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandULB VUB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Antwerp, Antwerp, BelgiumRutherford Appleton Lab, Didcot, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM DAPNIA, Gif Sur Yvette, FranceDESY, Hamburg, GermanyUniv Hamburg, Inst Experimental Phys, Hamburg, GermanyMax Planck Inst Kernphys, Heidelberg, GermanyUniv Heidelberg, Phys Inst, Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceCINVESTAV Merida, Dept Fis Aplicada, Yucatan, MexicoCINVESTAV, Dept Fis, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow, RussiaLebedev Phys Inst, Moscow, RussiaMax Planck Inst Phys & Astrophys, Munich, GermanyUniv Paris 11, CNRS, IN2P3, Orsay, FranceCNRS, IN2P3, Ecole Polytech, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Rome, ItalyUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFM Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthochsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandAktas, A, Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany TI - Measurement of the proton structure function F-2 at low Q(2) in QED Compton scattering at HERA AB - The proton structure function F-2(x, Q(2)) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q(2), down to 0.5 GeV2, and Bjorken x up to similar to 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments. (C) 2004 Published by Elsevier B.V MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000223927800002 L2 - DEUTERON STRUCTURE FUNCTIONS; LEAD/SCINTILLATING-FIBER CALORIMETER; RED RADIATIVE CORRECTIONS; CROSS-SECTIONS; MUON SCATTERING; EP SCATTERING; LOW-X; SCALE-INVARIANCE; QCD ANALYSIS; H1 DETECTOR SO - Physics Letters B 2004 ;598(3-4):159-171 9982 UI - 4654 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Ratiani Z AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, Antwerp, BelgiumRutherford Appleton Lab, Didcot, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM DAPNIA, Gif Sur Yvette, FranceDESY, Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Aix Marseille 2, CPPM, CNRS IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow, RussiaPN Lebedev Phys Inst, Moscow, RussiaMax Planck Inst Phys & Astrophys, Munich, GermanyUniv Paris 11, LAL, IN2P3 CNRS, Orsay, FranceEcole Polytech, LLR, IN2P3 CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P CNRS, Paris, FranceAcad Sci Czech Republic, Inst Phys, Prague, Czech RepublicCharles Univ Prague, Fac Math & Phys, Prague, Czech RepublicUniv Roma 3, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandAktas, A, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Measurement of anti-deuteron photoproduction and a search for heavy stable charged particles at HERA AB - The cross section for anti-deuteron photoproduction is measured at HERA at a mean centre-of-mass energy of W-gammap=200 GeV in the range 0.2 < p(T)/M < 0.7 and \y\ < 0.4, where M, p(T) and y are the mass, transverse momentum and rapidity of the anti-deuteron in the HERA laboratory frame, respectively. The numbers of anti-deuterons per event are found to be similar in photoproduction to those in central proton-proton collisions at the CERN ISR but much lower than those in central Au-Au collisions at RHIC. The coalescence parameter B-2, which characterizes the likelihood of anti-deuteron production, is measured in photoproduction to be 0.010+/-0.002+/-0.001, which is much higher than in Au-Au collisions at a similar nucleon-nucleon centre-of-mass energy. No significant production of particles heavier than deuterons is observed and upper limits are set on the photoproduction cross sections for such particles MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 9 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000223351900001 L2 - OF-MASS ENERGY; ANTIDEUTERON PRODUCTION; ION COLLISIONS; NUCLEAR COLLISIONS; PROTON-PROTON; CROSS-SECTION; COALESCENCE; 70-GEV SO - European Physical Journal C 2004 ;36(4):413-423 9983 UI - 4655 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Liessner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JVM AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Ratiani Z AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, Antwerp, BelgiumRutherford Appleton Lab, Didcot, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM DAPNIA, Gif Sur Yvette, FranceDESY, Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow, RussiaPN Lebedev Phys Inst, Moscow, RussiaMax Planck Inst Phys & Astrophys, Munich, GermanyUniv Paris 11, LAL, IN2P3 CNRS, Orsay, FranceEcole Polytech, LLR, IN2P3 CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3 CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma 3, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyUniv PJ Safarik, Kosice, SlovakiaCERN, Geneva, SwitzerlandAktas, A, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Search for squark production in R-parity violating supersymmetry at HERA AB - A search for squarks in R-parity violating supersymmetry is performed in e(+/-)p collisions at HERA using the H1 detector. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb(-1) for e (+) p collisions and 13.5 pb(-1) for e(-)p collisions. The resonant production of squarks via a Yukawa coupling lambda' is considered, taking into account direct and indirect R-parity violating decay modes. No evidence for squark production is found in the multi-lepton and multi-jet final state topologies investigated. Mass dependent limits on lambda' are obtained in the framework of the Minimal Supersymmetric Standard Model. In addition, the results are interpreted in terms of constraints on the parameters of the minimal Supergravity model. At the 95% confidence level squarks of all flavours with masses up to 275 GeV are excluded in a large part of the parameter space for a Yukawa coupling of electromagnetic strength. For a coupling strength 100 times smaller, masses up to 220 GeV can be ruled out MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 7 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000223351900002 L2 - DOUBLE-BETA-DECAY; LIQUID ARGON CALORIMETER; ENERGY EP COLLISIONS; E(+)E(-) COLLISIONS; ROOT-S=189 GEV; QCD CASCADES; ROOT-S; SCATTERING; PARTICLES; PHYSICS SO - European Physical Journal C 2004 ;36(4):425-440 9984 UI - 4656 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Astvatsatourov A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Beglarian A AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Burrage A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Davidsson M AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dixon P AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Ferron S AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinemann B AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hilgers M AU - Hiller KH AU - Hladk J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jones MAS AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Koutov A AU - Kropivnitskaya A AU - Kroseberg J AU - Kueckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Ngovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Panassik V AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Phillips JP AU - Pitzl D AU - Poschl R AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LPNHE, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Forward pi(o) production and associated transverse energy flow in deep-inelastic scattering at HERA AB - Deep-inelastic positron-proton interactions at low values of Bjorken-x down to xapproximate to4.10(-5) which give rise to high transverse momentum pi(circle)-mesons are studied with the H1 experiment at HERA. The inclusive cross section for pi(circle)-mesons produced at small angles with respect to the proton remnant (the forward region) is presented as a function of the transverse momentum and energy of the pi(circle) and of the four-momentum transfer Q(2) and Bjorken-x. Measurements are also presented of the transverse energy flow in events containing a forward pi(circle)-meson. Hadronic final state calculations based on QCD models implementing different parton evolution schemes are confronted with the data MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 8 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000223351900003 L2 - MONTE-CARLO GENERATOR; LIQUID ARGON CALORIMETER; PHYSICS EVENT GENERATION; INITIAL-STATE RADIATION; PARTON DISTRIBUTIONS; SMALL-X; PERTURBATION-THEORY; JET PRODUCTION; PROTON-SCATTERING; EP SCATTERING SO - European Physical Journal C 2004 ;36(4):441-452 9985 UI - 5496 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock A AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Glazov A AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhamnmer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt A AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehtar A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz I AU - Milstead D AU - Mohamed A AU - Moreau E AU - Morozov AH AU - Morozov IH AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivieri B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Ratiani Z AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow E AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandULB, VUB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandUniv Chicago, Enrico Fermi Inst, Chicago, IL 60637, USANewman, PR, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Evidence for a narrow anti-charmed baryon state AB - A narrow resonance in D*(-)p and D*(+)(p) over bar invariant mass combinations is observed in inelastic electron-proton collisions at centre-of-mass energies of 300 GeV and 320 GeV at HERA. The resonance has a mass of 3099 +/- 3(stat.) +/- 5(syst.) MeV and a measured Gaussian width of 12 +/- 3(stat.) MeV, compatible with the experimental resolution. The resonance is interpreted as an anti-charmed baryon with a minimal constituent quark composition of uudd (c) over bar, together with the charge conjugate. (C) 2004 Elsevier B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 83 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000221485200003 L2 - PHYSICS EVENT GENERATION; POSITIVE-STRANGENESS; HERA; PENTAQUARK; COLLISIONS; SCATTERING; MODEL; QCD; PHOTOPRODUCTION; DETECTOR SO - Physics Letters B 2004 ;588(1-2):17-28 9986 UI - 5895 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kueckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Pitzl D AU - Poschl R AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Spitzer H AU - Stamen R AU - Stella B AU - Stiewe J AU - Strauch I AU - Straumann U AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Antwerpen UIA, Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCtr Etud Saclay, CEA, DSM, DAPNIA, F-91191 Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechzentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Inclusive dijet production at low Bjorken-x in deep inelastic scattering AB - Dijet production in deep inelastic ep scattering is investigated in the region of low values of the Bjorken-variable x (10(-4) < x < 10(-2)) and low photon virtualities Q(2) (5 < Q(2) < 100 GeV2). The measured dijet cross sections are compared with perturbative QCD calculations in next-to-leading order. For most dijet variables studied, these calculations can provide a reasonable description of the data over the full phase space region covered, including the region of very low x. However, large discrepancies at low x and low Q(2) are observed for events with small separation in azimuth between the two highest transverse momentum jets. This region of phase space is described better by predictions based on the CCFM evolution equation, which incorporates k(t) factorized unintegrated parton distributions. A reasonable description can be also obtained using the Color Dipole Model or models incorporating virtual photon structure MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000220424200002 L2 - MONTE-CARLO GENERATOR; LEAD/SCINTILLATING-FIBER CALORIMETER; LIQUID ARGON CALORIMETER; PHYSICS EVENT GENERATION; INITIAL-STATE RADIATION; JET CROSS-SECTIONS; EP SCATTERING; PARTON DISTRIBUTIONS; PERTURBATION-THEORY; POMERANCHUK SINGULARITY SO - European Physical Journal C 2004 ;33(4):477-493 9987 UI - 6082 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner SB AU - Becker JB AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Haidt S AU - Hajduk L AU - Haller J AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnsin C AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage R AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz I AU - Milstead D AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer M AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheinsi J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandVUB, Inter Univ Inst High Energies ULB, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Chilton, Didcot, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-44221 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, DSM, DAPNIA, CE Saclay, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, D-24098 Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster LA1 4YW, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, S-22100 Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fac Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, CH-8006 Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, CH-1211 Geneva 23, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Muon pair production in ep collisions at HERA AB - Cross sections for the production of two isolated muons up to high di-muon masses are measured in ep collisions at HERA with the H1 detector in a data sample corresponding to an integrated luminosity of 71 pb(-1) at a centre of mass energy of roots = 319 GeV. The results are in good agreement with Standard Model predictions, the dominant process being photon-photon interactions. Additional muons or electrons are searched for in events with two high transverse momentum muons using the full data sample corresponding to 114 pb(-1), where data at roots = 301 GeV and roots = 319 GeV are combined. Both the di-lepton sample and the tri-lepton sample agree Well with the predictions. (C) 2004 Published by Elsevier B.V MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000189312400003 L2 - DILEPTON PRODUCTION; CROSS-SECTIONS; J/PSI MESONS; QCD ANALYSIS; PHOTOPRODUCTION; CALORIMETER; COLLIDERS; GENERATOR; DETECTOR; LEPTON SO - Physics Letters B 2004 ;583(1-2):28-40 9988 UI - 6165 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Braunschweig W AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Chekelian V AU - Clarke D AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cousinou MC AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Delerue N AU - Demirchyan R AU - De Roeck A AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dowell JD AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grabski V AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Haidt D AU - Hajduk L AU - Haller J AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson C AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keil F AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Koblitz B AU - Kolya SD AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kueckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luders S AU - Luke D AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martyn HU AU - Martyniak J AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milstead D AU - Moreau F AU - Morozov A AU - Morris JV AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebergall F AU - Niebuhr C AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Petrukhin A AU - Pitzl D AU - Poschl R AU - Povh B AU - Raicevic N AU - Rauschenberger J AU - Reimer P AU - Reisert B AU - Risler C AU - Rizvi E AU - Robmann P AU - Roosen R AU - Rostovtsev A AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt D AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Spitzer H AU - Stamen R AU - Stella B AU - Stiewe J AU - Strauch I AU - Straumann U AU - Thompson G AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Chilton, Didcot, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, DSM, DAPNIA, CE Saclay, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Sch Phys & Chem, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Inst Expt Kernphys, Wuppertal, GermanyCINVESTAV, Dept Fis Ap, Merida, Yucatan, MexicoSafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Search for single top quark production in ep collisions at HERA AB - A search for single top quark production is performed in e(+/-) pcollisions at HERA. The search exploits data corresponding to an integrated luminosity of 118.3 pb(-1). A model for the anomalous production of top quarks in a flavour changing neutral current process involving a tugamma coupling is investigated. Decays of top quarks into a b quark and a W boson are considered in the leptonic and the hadronic decay channels of the W. Both a cut-based analysis and a multivariate likelihood analysis are performed to discriminate anomalous top quark production from Standard Model background processes. In the leptonic channel, 5 events are found while 1.31 +/- 0.22 events are expected from the Standard Model background. In the hadronic channel, no excess above the expectation for Standard Model processes is found. These observations lead to a cross section (ep --> e t X) = 0.29(-0.14)(+0.15) pb at roots = 319 GeV. Alternatively, assuming that the observed events are due to a statistical fluctuation, upper limits of 0.55 pb on the anomalous top production cross section and of 0.27 on the tugamma coupling k(tugamma) are established at the 95% confidence level MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 14 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000189173600002 L2 - LIQUID ARGON CALORIMETER; MISSING TRANSVERSE-MOMENTUM; DEEP-INELASTIC-SCATTERING; HIGH-ENERGY-PHYSICS; PARTON DISTRIBUTIONS; E(+)E(-) COLLISIONS; PERTURBATION-THEORY; HADRON-COLLISIONS; BOSON PRODUCTION; LEADING ORDER SO - European Physical Journal C 2004 ;33(1):9-22 9989 UI - 5074 AU - Alatorre J AU - Ronquillo D AU - Stoltzfus RJ AU - Kordas K AD - Univ Nacl Autonoma Mexico, Labs Coordinat, Coilco Univ, Mexico City 04510, DF, MexicoUniv Autonoma Queretaro, Queretaro, MexicoCornell Univ, Ithaca, NY, USA TI - Arsenic exposure is associated with a decrease in cognitive performance independent of nutritional status MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602459 SO - Faseb Journal 2004 ;18(4):A511-A511 9990 UI - 2711 AU - Alavez S AU - Moran J AU - Franco-Cea A AU - Ortega-Gomez A AU - Casaletti L AU - Cameron L AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Sao Paulo, BR-14049 Ribeirao Preto, BrazilUniv Fed Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Castelo Branco, Univ Estacio Sa, Rio De Janeiro, Brazil TI - Myosin Va is proteolysed in cerebellar granule neurons after excitotoxic injury MH - Brazil MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000224648800160 SO - Molecular Biology of the Cell 2004 ;15():29A-29A 9991 UI - 4372 AU - Alavez S AU - Moran J AU - Franco-Cea A AU - Ortega-Gomez A AU - Casaletti L AU - Cameron LC AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Sao Paulo, Fac Med Ribeirao Preto, Dept Biol Celular & Mol, Ribeirao Preto, BrazilUniv Fed Estado Rio Janeiro, Lab Bioquim Prot, Rio De Janeiro, BrazilUniv Estac Sa, Rio De Janeiro, BrazilUniv Castelo Branco, PROCIMH, Rio De Janeiro, BrazilAlavez, S, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Apdo Postal 70-253, Mexico City 04510, DF, Mexico TI - Myosin Va is proteolysed in rat cerebellar granule neurons after excitotoxic injury AB - Cerebellar granule neurons when exposed to glutamate die through an excitotoxic mechanism induced by overactivation of glutamate receptors. This kind of cell death is mediated by an overload of intracellular calcium involving calpain activation, a Ca2+-dependent intracellular cysteine protease, among other intracellular responses. On the other hand, class V myosins are proteins that move cargo along actin filaments and one of its members, myosin Va, is involved in vesicles transport. Here we studied the effect of excitotoxicity on myosin Va in cultured cerebellar granule neurons. Western blot analysis of control cultures shows a band corresponding to myosin Va as well as an 80 kDa band corresponding to its proteolytic product by calpain. When cells are exposed to glutamate (500 muM), kainate (100 muM) or NMDA (150 muM) during 3-24 h, the proteolytic processing of myosin Va is markedly increased. This proteolysis is inhibited by leupeptin (100 muM) and calpain inhibitor I (50 muM). These inhibitors also significantly improve the morphological appearance of the neurons possibly through the preservation of the cytoskeleton integrity. Our results suggest that myosin Va is a target for calpain I during an excitotoxic injury and could lead to a new area of research to address the participation of molecular motors in neurotoxicity. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000223967500029 L2 - neurodegeneration;glutamate;proteolysis;myosin Va;leupeptin;calpain;PRIMARY CULTURES; CALPAIN; BRAIN; PROTEIN; CELLS; INHIBITION; COMPLEX SO - Neuroscience Letters 2004 ;367(3):404-409 9992 UI - 3218 AU - Albain KS AU - Nag S AU - Calderillo-Ruiz G AU - Jordaan JP AU - Llombart A AU - Pluzanska A AU - Pawlicki M AU - Melemed AS AU - O'Shaughnessy J AU - Reyes JM AD - Loyola Univ, Chicago Med Ctr, Maywood, IL 60153, USAInlaks & Budhrani Hosp, Pune, Maharashtra, IndiaInst Nacl Cancerol, Thalpan, MexicoAddington Hosp, Durban, South AfricaInst Valenciano Oncol, Valencia, SpainKlin Chemioterapii, Lodz, PolandCtr Oncol, Krakow, PolandBaylor Sammons Canc Ctr, Dallas, TX, USAClin Las Condes, Santiago, Chile TI - Global phase III study of gemcitabine plus paclitaxel (GT) vs. paclitaxel (T) as frontline therapy for metastatic breast cancer (MBC): First report of overall survival MH - Chile MH - India MH - Mexico|Distrito Federal MH - Poland MH - South Africa MH - Spain MH - USA PB - ALEXANDRIA: AMER SOC CLINICAL ONCOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 0732-183X UR - ISI:000223512400017 SO - Journal of Clinical Oncology 2004 ;22(14):5S-5S 9993 UI - 6056 AU - Alcantara VE AU - Gallardo EG AU - Hong C AU - Walker DH AD - Univ Texas, Med Branch, WHO Collaborating Ctr Trop Dis, Dept Pathol, Galveston, TX 77555, USAInst Salud Estado Mexico, Toluca, MexicoWalker, DH, Univ Texas, Med Branch, WHO Collaborating Ctr Trop Dis, Dept Pathol, 301 Univ Blvd,Keiller Bldg, Galveston, TX 77555 USA TI - Typhus group rickettsiae antibodies in rural Mexico MH - Mexico|Estado De Mexico MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Infectious Diseases U5 - J;Letter AV - English IS - 1080-6040 UR - ISI:000220079400039 L2 - FEVER SO - Emerging Infectious Diseases 2004 ;10(3):549-551 9994 UI - 6227 AU - Alcubierre M AU - Allen G AU - Bona C AU - Fiske D AU - Goodale T AU - Guzman FS AU - Hawke I AU - Hawley SH AU - Husa S AU - Koppitz M AU - Lechner C AU - Pollney D AU - Rideout D AU - Salgado M AU - Schnetter E AU - Seidel E AU - Shinkai H AU - Shoemaker D AU - Szilagyi B AU - Takahashi R AU - Winicour J AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMax Planck Inst Gravitat Phys, D-14476 Golm, GermanyUniv Illes Balears, Dept Fis, Palma de Mallorca 07122, SpainUniv Maryland, Dept Phys, College Pk, MD 20742, USAUniv Texas, Ctr Relat, Austin, TX 78712, USAUniv Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, GermanyRIKEN, Inst Phys & Chem Res, Computat Sci Div, Wako, Saitama 3510198, JapanCornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853, USAUniv Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USATheoret Astrophys Ctr, DK-2100 Copenhagen, DenmarkAlcubierre, M, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Towards standard testbeds for numerical relativity AB - In recent years, many different numerical evolution schemes for Einstein's equations have been proposed to address stability and accuracy problems that have plagued the numerical relativity community for decades. Some of these approaches have been tested on different spacetimes, and conclusions have been drawn based on these tests. However, differences in results originate from many sources, including not only formulations of the equations, but also gauges, boundary conditions, numerical methods and so on. We propose to build up a suite of standardized testbeds for comparing approaches to the numerical evolution of Einstein's equations that are designed to both probe their strengths and weaknesses and to separate out different effects, and their causes, seen in the results. We discuss general design principles of suitable testbeds, and we present an initial round of simple tests with periodic boundary conditions. This is a pivotal first step towards building a suite of testbeds to serve the numerical relativists and researchers from related fields who wish to assess the capabilities of numerical relativity codes. We present some examples of how these tests can be quite effective in revealing various limitations of different approaches, and illustrating their differences. The tests are presently limited to vacuum spacetimes, can be run on modest computational resources and can be used with many different approaches used in the relativity community MH - Denmark MH - Germany MH - Japan MH - Mexico|Distrito Federal MH - Spain MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 28 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000188931600019 L2 - VACUUM FIELD-EQUATIONS; INITIAL VALUE-PROBLEM; HEAD-ON COLLISION; 2 BLACK-HOLES; GRAVITATIONAL-WAVES; GENERAL-RELATIVITY; HYPERBOLIC FORMULATIONS; SCHWARZSCHILD SPACETIME; CONSTRAINT PROPAGATION; ASHTEKAR FORMULATION SO - Classical and Quantum Gravity 2004 ;21(2):589-613 9995 UI - 3422 AU - Aldana M AU - Larralde H AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv New Mexico, Consortium Amer Interdisciplinary Sci, Albuquerque, NM 87131, USAAldana, M, UNAM, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Phase transitions in scale-free neural networks: Departure from the standard mean-field universality class AB - We investigate the nature of the phase transition from an ordered to a disordered state that occurs in a family of neural network models with noise. These models are closely related to the majority voter model, where a ferromagneticlike interaction between the elements prevails. Each member of the family is distinguished by the network topology, which is determined by the probability distribution of the number of incoming links. We show that for homogeneous random topologies, the phase transition belongs to the standard mean-field universality class, characterized by the order parameter exponent beta=1/2. However, for scale-free networks we obtain phase transition exponents ranging from 1/2 to infinity. Furthermore, we show the existence of a phase transition even for values of the scale-free exponent in the interval (1.5,2], where the average network connectivity diverges MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000226299200037 L2 - COMPLEX NETWORKS; MODEL SO - Physical Review e 2004 ;70(6): 9996 UI - 4793 AU - Aleshkevich VA AU - Vysloukh VA AU - Gorin SV AU - Zhukarev AS AU - Kartashov YV AD - Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, MexicoUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainUniv Politecn Catalunya, ICFO, ES-08034 Barcelona, SpainAleshkevich, VA, Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, Russia TI - Periodic pulse sequences in nonlinear optical fibres with the third-order group-velocity dispersion AB - A new class of stationary periodic solutions of the nonlinear wave Schrodinger equation is studied taking the third-order group-velocity dispersion into account and their main properties and regions of existence are analysed. It is shown that a periodic sequence of pulses with a high contrast and a high repetition rate can be formed near the zero second-order group-velocity dispersion point MH - Mexico|Puebla MH - Russia MH - Spain PB - LETCHWORTH: TURPION LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 1063-7818 UR - ISI:000222994900012 L2 - cubic dispersion;cnoidal waves;optical fibres;CNOIDAL WAVES; WAVELENGTH; PROPAGATION; SOLITONS SO - Quantum Electronics 2004 ;34(5):457-460 9997 UI - 6201 AU - Aleshkevich VA AU - Kartashov YV AU - Zelenina AS AU - Vysloukh VA AU - Torres JP AU - Torner L AD - Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, Cholula, MexicoUniv Politecn Catalunya, Inst Ciencias Foton, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainAleshkevich, VA, Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia TI - Eigenvalue control and switching by fission of multisoliton bound states in planar waveguides AB - We report the results of numerical studies of the fission of N-soliton bound states at the interface formed by a Kerr nonlinear medium and a linear dielectric in a planar waveguide. A variety of effects are shown to occur, with applications to all-optical eigenvalue soliton contml. (C) 2004 Optical Society of America MH - Mexico|Puebla MH - Russia MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000189031500022 L2 - LIGHT-BEAM PROPAGATION; NONLINEAR INTERFACES; SPATIAL SOLITONS; SCATTERING; DISPERSION; REFLECTION; PARTICLE SO - Optics Letters 2004 ;29(5):483-485 9998 UI - 4375 AU - Alexandrov M AU - Blanco X AU - Makagonov P AD - IPN, Ctr Res Comp, Mexico City, DF, Mexico. Autonomous Univ Barcelona, Dept French & Romance Philol, Barcelona, Spain. Mixteca Univ Technol, Mexico City, DF, Mexico TI - Testing word similarity: Language independent approach with examples from romance AB - Identification of words with the same basic meaning (stemming) has important applications in Information Retrieval, first of all for constructing word frequency lists. Usual morphologically-based approaches (including the Porter stemmers) rely on language-dependent linguistic resources or knowledge, which causes problems when working with multilingual data and multithematic document collections. We suggest several empirical formulae with easy to adjust parameters and demonstrate how to construct such formulae for a given language using an inductive method of model self-organization. This method considers a set of models (formulae) of a given class and selects the best ones using training and test samples. We describe the method and give detailed examples for French, Italian, Portuguese, and Spanish. The formulae are examined on real domain-oriented document collections. Our approach can be easily applied to other European languages MH - Mexico|Distrito Federal MH - Mexico|Oaxaca MH - Spain T3 - NATURAL LANGUAGE PROCESSING AND INFORMATION SYSTEMSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticledyner@cic.ipn.mx Xavier.Blanco@uab.es mpp2003@inbox.ru0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAV30 AV - English IS - 0302-9743 UR - ISI:000223761800020 SO - 2004 ;():229-241 9999 UI - 3366 AU - Alexeev YE AU - Vasilchenko IS AU - Kharisov BI AU - Blanco LM AU - Garnovskii AD AU - Zhdanov YA AD - Univ Autonoma Nuevo, Fac Ciencias Quim, Monterrey, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov Na Donu 344006, RussiaRostov State Univ, S Sci Ctr, Rostov Na Donu 344006, RussiaKharisov, BI, Univ Autonoma Nuevo, Fac Ciencias Quim, Monterrey, Mexico TI - Review: Synthetically modified carbohydrates as ligands AB - The coordinative properties of synthetically modified carbohydrates to metal cations are reviewed. Such metal complexes are distinct, owing to the structural diversity of the ligands and coordination modes. The influences of complex-formation conditions on chemical properties of modified carbohydrates, as well as on organic reactions (especially diastereoselective ones), are examined. In addition, this manuscript demonstrates the practical importance of the coordination interactions MH - Mexico|Nuevo Leon MH - Russia PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 0095-8972 UR - ISI:000226382500001 L2 - synthetic modification of carbohydrates;sugar-metal complexes;supramolecular structures;diastereoselective reactions;BIOLOGICALLY IMPORTANT LIGANDS; TRANSITION-METAL COMPLEXES; REACTIVE POLYMER GELS; N-GLYCOSIDE LIGANDS; X-RAY STRUCTURE; NUCLEAR MAGNETIC-RESONANCE; PHASE-TRANSFER CATALYSIS; LEWIS ACID COMPLEXES; DIELS-ALDER REACTION; C-C BOND SO - Journal of Coordination Chemistry 2004 ;57(17-18):1447-1517 10000 UI - 5256 AU - Alexopoulos K AU - Fatseas P AU - Melissari E AU - Vlahakos D AU - Roumelioti P AU - Mavromoustakos T AU - Mihailescu S AU - Paredes-Carbajal MC AU - Mascher D AU - Matsoukas J AD - Univ Patras, Dept Chem, GR-26110 Patras, GreeceAgios Andreas Hosp, Blood Dept, Patras 26335, GreeceOnassis Cardiac Surg Ctr, Athens, GreeceNatl Hellen Res Fdn, Inst Organ & Pharmaceut Chem, GR-11635 Athens, GreeceUniv Craiova, Fac Med, Dept Physiol, RO-1100 Craiova, RomaniaUniv Nacl Autonoma Mexico, Sch Med, Dept Physiol, Mexico City 04510, DF, MexicoAlexopoulos, K, Univ Patras, Dept Chem, GR-26110 Patras, Greece TI - Design and synthesis of novel biologically active thrombin receptor non-peptide mimetics based on the pharmacophoric cluster Phe/Arg/NH2 of the Ser(42)-Phe-Leu-Leu-Arg(46) motif sequence: Platelet aggregation and relaxant activities AB - The identification of the thrombin receptor has promoted the interest for the development of new therapeutic agents capable of selectively inhibiting unwanted biological effects of thrombin on various cell types. In this study we have designed and synthesized two series of new thrombin receptor antagonists based on the thrombin receptor motif sequence S42FLLR46, one possessing two (Phe/Arg) pharmacophoric groups and the other possessing three (Phe/Arg/NH2). N-(6-Guanidohexanoyl)-N'-(phenylacetyl)piperazine (1), N-(phenylacetyl)-4-(6-guanidohexanoylamidomethyl)piperidine (2), and N-(phenylacetyl)-3-(6-guanidohexanoylamido)pyrrolidine (3) (group A) carry the two pharmacophoric side chains of Phe and Arg residues incorporated on three different templates (piperazine, 4-aminomethylpiperidine, and 3-aminopyrrolidine). Compounds with three pharmacophoric groups (group B) were built similarly to group A using the same templates with the addition of an extra methylamino group leading to (S)-N-(6-guanidohexanoyl)-N'-(2-amino-3-phenylpropionyl)piperazine (4), (S)-N-(2-amino-3-phenylpropionyl)-4-(6-guanidohexanoylamidomethyl)piperi dine (5), and (S)-N-(2-amino-3-phenylpropionyl)-3-(6-guanidohexanoylamido)pyrrolidine (6). Compounds were able to inhibit thrombin-induced human platelet activation even at low concentrations. In particular, among compounds in group A, compound 3 was found to be the most powerful thrombin receptor activation inhibitor, showing an IC50 of approximately 0.11 mM on platelet aggregation assay. Among compounds in group B, compound 4 was the most powerful to inhibit thrombin-induced platelet aggregation, showing an IC50 of approximately 0.09 mM. All compounds were also found to act as agonists in the rat aorta relaxation assay. Interestingly, the order or potency of these compounds as agonists of the endothelial thrombin receptor was the inverse of the order of potency of the same compounds as antagonists of the platelet thrombin receptor. Such compounds that are causing vasodilation while simultaneously inhibiting platelet aggregation would be very useful in preventing the installation of atherosclerotic lesions and deserve further investigation as potential drugs for treating cardiovascular diseases. The above findings coupled with computational analysis molecular dynamics experiments support also our hypothesis that a cluster of phenyl, guanidino, and amino groups is responsible for thrombin receptor triggering and activation MH - Greece MH - Mexico|Distrito Federal MH - Romania PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Medicinal U5 - J;Article AV - English IS - 0022-2623 UR - ISI:000221963400003 L2 - EXPERIMENTAL ALLERGIC ENCEPHALOMYELITIS; MAGNETIC-RESONANCE-SPECTROSCOPY; AGONIST PEPTIDES; CONFORMATIONAL-ANALYSIS; SMOOTH-MUSCLE; ACTIVATION; MECHANISM; ANALOGS; DOMAIN; NMR SO - Journal of Medicinal Chemistry 2004 ;47(13):3338-3352 10001 UI - 4055 AU - Alfaro J AU - Morales-Tecotl HA AU - Reyes M AU - Urrutia LF AD - Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, ChileUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoAlfaro, J, Pontificia Univ Catolica Chile, Fac Fis, Casilla 306, Santiago 22, Chile TI - Alternative approaches to Lorentz violation invariance in loop quantum gravity inspired models AB - Recent claims point out that possible violations of Lorentz symmetry appearing in some semiclassical models of extended matter dynamics motivated by loop quantum gravity can be removed by a different choice of phase-space variables. In this note we show that such alternative is inconsistent with (i) the choice of variables in the regularized underlying quantum theory from which the effective theories are derived and (ii) the application of the correspondence principle. A consistent choice will violate standard Lorentz invariance, with the exception of trivial zero Planck scale corrections which are allowed by the analysis. Thus, for nontrivial corrections, to preserve a relativity principle in these models, the linear realization of Lorentz symmetry should be extended or superseded MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000224800000055 L2 - COHERENT STATES GCS; BLACK-HOLE ENTROPY; SPIN DYNAMICS QSD; GAMMA-RAY BURSTS; SPECIAL RELATIVITY; PHENOMENOLOGY; PROPAGATION; CONSTRAINT; GEOMETRY; LIMITS SO - Physical Review D 2004 ;70(8): 10002 UI - 4546 AU - Allen LE AU - Calvet N AU - D'Alessio P AU - Merin B AU - Hartmann L AU - Megeath ST AU - Gutermuth RA AU - Muzerolle J AU - Pipher JL AU - Myers PC AU - Fazio GG AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACtr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoINTA, Lab Astrofis Espacial & Fis Fundamental, Madrid 50727, SpainUniv Rochester, Dept Phys & Astron, Rochester, NY 14627, USAUniv Arizona, Steward Observ, Tucson, AZ 85721, USAAllen, LE, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - Infrared Array Camera (IRAC) colors of young stellar objects AB - We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. Disk and envelope models characterized by infall and/or accretion rates found in previous studies can quantitatively account for the range of IRAC colors found in four young embedded clusters: S140, S171, NGC 7129, and Cep C. The IRAC color-color diagram ([3.6]-[4.5] vs. [5.8]-[8.0]) can be used to help distinguish between young stars with only disk emission and protostars with circumstellar envelopes MH - USA MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 62 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000223634300066 L2 - infrared : stars;stars : formation;stars : pre-main-sequence;T-TAURI STARS; AURIGA MOLECULAR CLOUD; ACCRETION DISKS; SEQUENCE; GRAINS; MODELS; DUST SO - Astrophysical Journal Supplement Series 2004 ;154(1):363-366 10003 UI - 6044 AU - Almagro JC AD - Florida Int Univ, Dept Sci Biol, Comparat Immunol Inst, Miami, FL 33199, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Mexico City 04510, DF, MexicoAlmagro, JC, Florida Int Univ, Dept Sci Biol, Comparat Immunol Inst, HLS-327,11200 SW 8th St, Miami, FL 33199 USA TI - Identification of differences in the specificity-determining residues of antibodies that recognize antigens of different size: implications for the rational design of antibody repertoires AB - Studies of antibodies of known three-dimensional structure have revealed that insertion and deletion of amino acids at the hypervariable loops change the canonical structures, thus generating differences in the antigen-binding site topography. Such differences determine the size of the antigen with which the antibody interacts. Here, 59 unique antibodies determined at a resolution of 3.0 Angstrom or below, including 19 in complex with proteins, 18 with peptides and 22 with haptens, were analyzed to identify and characterize differences in the residues that are directly involved in the interaction with antigen, so-called specificity-determining residues (SDRs). It was found that antibodies use a similar number of SDRs to recognize proteins and peptides but contact haptens with five SDRs less. By using a score of SDR usage, differences in the location of the SDRs, depending on the type of antigen recognized, were then identified with precision. An analysis of the surface generated by the SDRs usage indicates that the differences found correlate well with the size of the antigen. Anti-protein antibodies have the largest SDR surface, with SDRs of high usage located in the edge of the surface. The SDR surface of anti-hapten antibodies is the smallest, with hot spots of contacts in the interior of the binding surface and buried in the V-L:V-H interface. The SDR surface of anti-peptide antibodies has a size in between anti-protein and anti-hapten antibodies, with the SDRs of high usage located in the interior of the antigen-binding site but do not buried as in anti-hapten antibodies. These findings led to a fine-tuning of the model correlating differences in the antigen-binding site topography with its preference to recognize antigens of different size. Therefore, it is discussed how this knowledge should help to design antibody repertoires biased toward the recognition of antigens of predefined size. Copyright (C) 2004 John Wiley Sons, Ltd MH - USA MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0952-3499 UR - ISI:000220115600005 L2 - antigen-binding site;hypervariable loops;complementary-determining regions;contacts;immunoglobulins;COMPLEMENTARITY-DETERMINING REGIONS; STRUCTURAL REPERTOIRE; CANONICAL STRUCTURES; BINDING-SITE; SEQUENCES; IMMUNOGLOBULINS; PROTEINS; SEGMENTS; LENGTH; INSERTIONS SO - Journal of Molecular Recognition 2004 ;17(2):132-143 10004 UI - 5349 AU - Alonso G AU - Espino J AU - Berhault G AU - Alvarez L AU - Rico JL AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, MexicoUNAM, CCMC, Dept Catalisis, Ensenada 22830, Baja California, MexicoUMSNH, Fac Ingn Quim, Catalysis Lab, Morelia 58000, Michoacan, MexicoUMSNH, Inst Invest Met, Morelia 58000, Michoacan, MexicoInst Rech Catalyse, CNRS, F-69626 Villeurbanne, FranceAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Miguel Cervantes 120, Chihuahua 31109, Mexico TI - Activation of tetraalkylammonium thiotungstates for the preparation of Ni-promoted WS2 catalysts AB - A comparative study of the synthesis of unsupported Ni/WS2 catalysts by ex situ and in situ decomposition of thiosalts is herein reported. Ammonium thiotungstate (ATT), tetramethyl ammonium thiotungstate (TMATT), tetrapropylammonium thiotungstate (TPATT) and tetrabutylammonium thiotungstate (TBATT) and their nickel-promoted counterparts were used as precursors. Ex situ activation was performed under a H2S/H-2 flow whereas the in situ activation consists of the decomposition of the thiosalt in the presence of a hydrocarbon solvent during the hydrodesulfurization (HDS) of dibenzothiophene (DBT). The catalytic activity depends on both the method of activation and the nature of the precursor. The tetraalkylammonium thiotungstate precursors have been characterized by thermogravimetric analysis and the final catalysts by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and BET specific surface area measurements. Compared to ATT, the in situ activation of tetraalkylammonium thiotungstates has a negative impact on the HDS activity of the as-formed NiW catalysts while a moderate gain in activity was observed for ex situ activated catalysts. The presence of carbon in the tetraalkylammonium precursors accelerates the crystallization rate Of WS2-based catalysts leading to well-organized WS2 structure but with low specific surface areas. The accelerating rate of crystallization also limits the accommodation of Ni on the WS2 edges and then hinders the synergetic effect. This situation differs strikingly from MoS2-based catalysts for which no accelerating effect of carbon on the crystallization rate was observed. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000221837100004 L2 - ex situ and in situ activation;thiosalt precursors;hydrodesulfurization;tungsten sulfide;nickel promotion;TUNGSTEN SULFIDE CATALYSTS; IN-SITU ACTIVATION; CO-MO; HYDROTREATING CATALYSTS; AQUEOUS-SOLUTION; MODEL CATALYSTS; AMORPHOUS MOS3; HDS CATALYSTS; THIOMOLYBDATES; HYDRODESULFURIZATION SO - Applied Catalysis A-General 2004 ;266(1):29-40 10005 UI - 5397 AU - Alonso G AU - Siadati MH AU - Berhault G AU - Aguilar A AU - Fuentes S AU - Chianelli RR AD - Ctr Invest Mat Avanzados, Chihuahua 31109, Chih, MexicoUniv Texas, Mat Res Technol Inst, El Paso, TX 79968, USAInst Rech Catalyse, CNRS, F-69626 Villeurbanne, FranceUNAM, Ctr Ciencias Mat Condensada, Dept Catal, Ensenada 22830, Baja California, MexicoAlonso, G, Ctr Invest Mat Avanzados, Miguel Cervantes 120, Chihuahua 31109, Chih, Mexico TI - Synthesis of tetraalkylammonium thiometallate precursors and their concurrent in situ activation during hydrodesulfurization of dibenzothiophene AB - The synthesis of tetraalkylammonium thiomolybdates and thiotungstates, (NR4)(2)MS4 {R: heptyl or cetyltrimethyl, M: Mo or W} using an aqueous solution method is reported. This method significantly improves the yield of tetraalkylammonium compounds compared to previous studies. The one-step rapid substitution of [NH4](+) ions from ammonium thiomolybdate (ATM) and/or ammonium thiotungstate (ATT) with [(Heptyl)(4)N](+) and/or [(CTriM)N](+) ions, respectively, is described. Tetraheptylammonium thiomolybdate, tetraheptylammonium thiotungstate, cetyltrimethylammonium thiomolybdate and cetyltrimethylammonium thiotungstate were synthesized and characterized using Fourier transform infrared (FTIR) and UV-Vis spectroscopies. Thermal analyses (TGA-DTA) were done to study the fragmentation and decomposition behavior of their molecular structures. These tetraalkylammonium thiometallate precursors were in situ-activated concurrently during the hydrodesulfurization (HDS) of dibenzothiophene (DBT), producing MoS2 and WS2 catalysts, respectively. These catalysts analyzed by scanning electron microscopy showed large voids and S/M around 2 (M: Mo, W). High surface area (200-400 m(2)/g) and type IV adsorption-desorption nitrogen isotherms were obtained. The nature of the alkyl group affects both the surface area and HDS selectivity. In this respect, a high selectivity for direct C-S bond cleavage is observed for MoS2 and WS2 formed from THepATM and THepATT precursors, respectively. The X-ray diffraction study showed that the catalysts are poorly crystalline with a very weak (0 0 2) intensity except for the WS2 catalyst formed from THepATT. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000221713800013 L2 - aqueous solution;thiometallates;in situ activation;MOS2 and WS2 catalysts;MOLYBDENUM SULFIDE CATALYSTS; RAY ABSORPTION SPECTROSCOPY; TRANSITION-METAL SULFIDES; AMMONIUM TETRATHIOMOLYBDATE; ELECTRONIC-STRUCTURE; MOS2 CATALYSTS; WS2 CATALYSTS; HDS ACTIVITY; DECOMPOSITION; THIOMOLYBDATES SO - Applied Catalysis A-General 2004 ;263(1):109-117 10006 UI - 6283 AU - Alonso G AU - Chianelli RR AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chih 31109, MexicoUniv Texas, Mat Res Technol Inst, El Paso, TX 79968, USAAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Miguel Cervantes 120, Chih 31109, Mexico TI - WS2 catalysts from tetraalkyl thiotungstate precursors and their concurrent in situ activation during HDS of DBT AB - The synthesis of tetraalkylammonium thiotungstates (R4N)(2)WS4 {R-4 = tetraheptyl or cetyltrimethyl}, using an aqueous solution method is reported. Tetraheptylammonium thiotungstate and cetyltrimethylammonium thiotungstate were synthesized and characterized using FTIR, UV, and TGA-DTA. These thiosalts precursors were in situ-activated concurrently during hydrodesulfurization (HDS) of dibenzothiophene (DBT), producing WS2 catalysts. These catalysts were analyzed by X-ray diffraction and surface area. The nature of the alkyl group affects both the surface area and the HDS selectivity. The X-ray diffraction study showed that the catalysts are poorly crystalline, with a very weak intensity of (002). (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Chihuahua MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000188798400041 L2 - in situ activated;WS2 catalysts;tetraalkyl thiometallates;MOLYBDENUM SULFIDE CATALYSTS; THIOMOLYBDATES; AMMONIUM; MOS2; DECOMPOSITION; COMPLEXES SO - Journal of Catalysis 2004 ;221(2):657-661 10007 UI - 5273 AU - Alonso JA AU - Arellano JS AU - Molina LM AU - Rubio A AU - Lopez MJ AD - Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainDonostia Int Phys Ctr, San Sebastian 20018, SpainUniv Autonoma Metropolitana Azcapotzalco, Area Fis Atom Mol Aplicada, Mexico City 02200, DF, MexicoAarhus Univ, Inst Phys & Astron, DK-800 Aarhus, DenmarkAlonso, JA, Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, Spain TI - Interaction of molecular and atomic hydrogen with single-wall carbon nanotubes AB - Density functional calculations are performed to study the interaction of molecular and atomic hydrogen with (5, 5) and (6, 6) single-wall carbon nanotubes. Molecular physisorption is predicted to be the most stable adsorption state, with the molecule at equilibrium at a distance of 5-6 a.u. from the nanotube wall. The physisorption energies outside the nanotobes are approximately 0.07 eV, and larger inside, reaching a value of 0.17 eV inside the (5, 5) nanotube. Although these binding energies appear to be lower than the values required for an efficient adsorption/desorption operation at room temperature and normal pressures, the expectations are better for operation at lower temperatures and higher pressures, as found in many experimental studies. A chemisorption state with the molecule dissociated has also been found, with the H atoms much closer to the nanotube wall. However, this state is separated from the physisorption state by an activation barrier of 2 eV or more. The dissociative chemisorption weakens carbon-carbon bonds, and the concerted effect of many incoming molecules with sufficient kinetic energies can lead to the scission of the nanotube MH - Denmark MH - Mexico|Distrito Federal MH - Spain PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 1536-125X UR - ISI:000221899800014 L2 - carbon nanotubes;graphite;hydrogen absorption;HIGH COVERAGES; STORAGE; PSEUDOPOTENTIALS; NANOSTRUCTURES; ADSORPTION SO - Ieee Transactions on Nanotechnology 2004 ;3(2):304-310 10008 UI - 3982 AU - Alonso MA AU - Bastiaans MJ AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoTech Univ Eindhoven, Fac Elektrotech, NL-5600 MB Eindhoven, NetherlandsAlonso, MA, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Mapping-based width measures and uncertainty relations for periodic functions AB - Measures for the width of a periodic function are discussed, based on five different mappings of a (periodic) function on a circle to a (non-periodic) function on a line or line segment. The uncertainty relations corresponding to these measures are also obtained by using a generalization of the Cauchy-Schwarz inequality. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0165-1684 UR - ISI:000224791000013 L2 - width measures;periodic functions;uncertainty relations;minimum uncertainty states;DISCRETE-TIME SIGNALS; PHASE UNCERTAINTY; OPTICAL-PHASE; 2ND MOMENTS; PRINCIPLE; FREQUENCY; STATES; FIELD SO - Signal Processing 2004 ;84(12):2425-2435 10009 UI - 3541 AU - Alpay D AU - Shapiro M AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelIPN, ESFM, Dept Matemat, Mexico City 07300, DF, MexicoAlpay, D, Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, Israel TI - Reproducing kernel quaternionic pontryagin spaces AB - This paper studies various aspects of reproducing kernel spaces with a possibly indefinite metric when the field of scalar is replaced by the skew-field of quaternions. We first discuss in some details the positive case. A key fact which allows to consider the non-positive case is that Hermitian matrices with quaternionic entries have only real eigenvalues. This permits to extend the notion of functions with a finite number of negative squares to the present setting and we prove in particular that there is a one-to-one correspondence between such functions and reproducing kernel Pontryagin quaternionic spaces MH - Israel MH - Mexico|Distrito Federal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000226061500001 L2 - reproducing kernel spaces;pontryagin spaces;hyperholomorphic functions;OPERATORS SO - Integral Equations and Operator Theory 2004 ;50(4):431-476 10010 UI - 5288 AU - Alpay D AU - Shapiro M AU - Volok D AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelInst Politecn Nacl, Escuela Super Fis & Math, Dept Matemat, Mexico City 07300, DF, MexicoAlpay, D, Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, Israel TI - de Branges Rovnyak spaces and Schur functions: the hyperholomorphic case AB - We extend to the hyperholomorphic case the notion of Schur functions and the corresponding realization theory. We introduce the notion of characteristic operator function for coisometric colligations between Hilbert spaces of hyperholomorphic functions. We show that every Schur function is the characteristic operator function of a coisometric colligation and vice-versa. (C) 2004 Academie des sciences. Publie par Elsevier SAS. Tous droits reserves MH - Israel MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000221949300002 SO - Comptes Rendus Mathematique 2004 ;338(6):437-442 10011 UI - 3898 AU - Alrifai MT AU - Zribi M AU - Sira-Ramirez H AD - Kuwait Univ, Dept Elect Engn, Kuwait 13060, KuwaitCINVESTAV IPN, Dept Ingn Elect, Mexico City 07300, DF, MexicoAlrifai, MT, Kuwait Univ, Dept Elect Engn, POB 5969, Kuwait 13060, Kuwait TI - Static and dynamic sliding mode control of variable reluctance motors AB - In this paper, static and a dynamic sliding mode control schemes are proposed for the speed control of a variable reluctance motor (VRM). The proposed controllers guarantee the asymptotic regulation of the speed of the motor to its desired value. Simulation results of the proposed controllers are given to illustrate the developed theory. In addition, the robustness of the proposed sliding mode controllers to changes in the parameters of the motor and to load disturbances is validated through simulation studies MH - Kuwait MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000225135200003 L2 - FEEDBACK-LINEARIZING CONTROL; ADAPTIVE-CONTROL; DRIVE SO - International Journal of Control 2004 ;77(13):1171-1188 10012 UI - 5431 AU - Althabe F AU - Belizan JM AU - Villar J AU - Alexander S AU - Bergel E AU - Ramos S AU - Romero M AU - Donner A AU - Lindmark G AU - Langer A AU - Farnot U AU - Cecatti JG AU - Carroli G AU - Kestler E AD - WHO, Pan Amer Hlth Org, Latin Amer Ctr Perinatol, Montevideo, UruguayWHO, ENDP,UNFPA, World Bank Special Programme Res Dev & Res Traini, Dept Reprod Hlth & Res, CH-1211 Geneva, SwitzerlandFree Univ Brussels, Ecole Sante Publ, Brussels, BelgiumCtr Study State & Soc, Buenos Aires, DF, ArgentinaUniv Western Ontario, Dept Epidemiol & Biostat, London, ON, CanadaUniv Uppsala, Dept Obstet & Gynaecol, S-75105 Uppsala, SwedenPopulat Council, Reg Off Latin Amer & Caribbean, Mexico City, DF, MexicoHosp Ginecoobstet Amer Arias, Havana, CubaUniv Campinas, Ctr Studies Maternal & Child Hlth Campinas, Campinas, SP, BrazilCtr Rosarino Estudios Perinatales, Rosario, Santa Fe, ArgentinaEpidemiol Res Ctr Reprod & Sexual Hlth, Guatemala City, GuatemalaAlthabe, F, Hosp Clin Montevideo, Latin Amer Ctr Perinatol, Av Italia S-N Casilla de Correos 627, Montevideo 11000, Uruguay TI - Mandatory second opinion to reduce rates of unnecessary caesarean sections in Latin America: a cluster randomised controlled trial AB - Background Latin America has a high rate of caesarean sections. We tested the hypothesis that a hospital policy of mandatory second opinion, based on the best existing scientific evidence, reduces the hospital caesarean section rate by 25%, without increasing maternal and perinatal morbidity and mortality. Methods 36 hospitals in Argentina (18), Brazil (eight), Cuba (four), Guatemala (two), and Mexico (four), were randomly assigned to intervention or control in a matched pair design. All physicians in the intervention hospitals deciding a nonemergency caesarean section had to follow a policy of mandatory second opinion. The primary outcome was the overall caesarean section rate in the hospitals after a 6-month implementation period. We also assessed women's satisfaction with labour and delivery care and physicians' acceptance of the second opinion policy. Findings A total of 34 hospitals attending 149 276 deliveries were randomised and completed the protocol. The mandatory second opinion policy was associated with a small but significant reduction in rates of caesarean section (relative rate reduction 7.3%; 95% Cl 0.2-14.5), mostly in intrapartum sections (12.6%; 0.6-24.7). Other maternal and neonatal outcomes and women's perceptions and satisfaction with the process of care were similarly distributed between the groups. Interpretation In hospitals applying this policy of second opinion, 22 intrapartum caesarean sections could be prevented per 1000 deliveries, without affecting maternal or perinatal morbidity, and without affecting mothers' satisfaction with the care process MH - Argentina MH - Belgium MH - Brazil MH - Canada MH - Cuba MH - Guatemala MH - Mexico|Distrito Federal MH - Sweden MH - Switzerland MH - Uruguay PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 16 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000221962800007 L2 - GENERAL-PRACTITIONERS; DELIVERY; BRAZIL; TRENDS SO - Lancet 2004 ;363(9425):1934-1940 10013 UI - 4059 AU - Altieri A AU - Bosetti C AU - Gallus S AU - Franceschi S AU - Dal Maso L AU - Talamini R AU - Levi F AU - Negri E AU - Rodriguez T AU - La Vecchia C AD - Mario Negri Inst Pharmacol Res, I-20157 Milan, ItalyInt Agcy Res Canc, F-69732 Lyon, FranceCtr Riferimento Oncol, Serv Epidemiol & Biostat, I-33081 Aviano, ItalyCHU Vaudois, Inst Univ Med Sociale & Prevent, Registre Vaudois Tumeurs, CH-1011 Lausanne, SwitzerlandUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi 78210, MexicoUniv Publ Navarra, Dept Ciencias Salud, Pamplona 31008, SpainUniv Milan, Ist Stat Med & Biometria, I-20133 Milan, ItalyAltieri, A, Mario Negri Inst Pharmacol Res, Via Eritrea 62, I-20157 Milan, Italy TI - Wine, beer and spirits and risk of oral and pharyngeal cancer: a case-control study from Italy and Switzerland AB - We examined the relation between consumption of different types of alcoholic beverages and the risk of oral and pharyngeal cancer, using data from a case-control study conducted in Italy and Switzerland between 1992 and 1997. This included a total of 749 cases of oral and pharyngeal cancer and 1,772 hospital controls, admitted for acute, non-neoplastic conditions, unrelated to alcohol and smoking consumption. Significant trends in risk were found with increasing total alcohol intake, with multivariate odds ratios (OR) of 2.1 for drinkers of 3-4 drinks/ day, as compared to abstainers or light drinkers ( less than or equal to 2 drinks/day), 5.0 for 5-7, 12.2 for 8-11 and 21.1 for greater than or equal to 12 drinks/day. Similar increased risks for subsequent levels of consumption were found for wine drinkers. After allowance for wine intake, the ORs for beer drinkers were 1.2 for 1-2 drinks/day, and 2.3 for greater than or equal to 3 drinks/day. Corresponding values for spirit drinkers were 1.0 and 1.9. Patterns of risk for wine drinkers were similar for wine only drinkers and drinkers of wine, plus beer and spirits. Our study indicates that in populations with frequent wine consumption, wine per se can strongly increase the risk of cancer of the oral cavity and pharynx, and confirms that the most prevalent alcoholic beverage in each population tends to be the one with the highest risk. (C) 2004 Elsevier Ltd. All rights reserved MH - France MH - Italy MH - Mexico|San Luis Potosi MH - Spain MH - Switzerland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Oncology;Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1368-8375 UR - ISI:000224599800007 L2 - mouth neoplasms;pharyngeal neoplasms;alcohol drinking;risk factors;case-control study;UPPER AERODIGESTIVE TRACT; ALCOHOLIC BEVERAGE PREFERENCE; UPPER DIGESTIVE-TRACT; DRINKING; SMOKING; CAVITY; LIQUOR; DIET; CONSUMPTION; PREVENTION SO - Oral Oncology 2004 ;40(9):904-909 10014 UI - 6200 AU - Alvarado FLC AU - Sukiennicki A AU - Wojtczak L AU - Zasada I AD - Univ Lodz, Solid State Phys Dept, PL-90236 Lodz, PolandInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoWarsaw Univ Technol, Fac Phys, PL-00622 Warsaw, PolandZasada, I, Univ Lodz, Solid State Phys Dept, Ul Pomorska 149-153, PL-90236 Lodz, Poland TI - Order-disorder phenomena in binary alloy thin films AB - We consider the order-disorder phase transition in thin films of the binary, AB(3) type, alloys. The theory is based on the model consisting of pairwise interactions between nearest neighbour atoms belonging to the sublattices in the form of the monoatomic layers parallel to the surface. This model, the so-called Valenta's model is well-known in literature. It is essential to take it into account for the description of thin films while the model of continuum can be successfully used for semi-infinite samples. The numerical results only slightly differ for both the models in the case when the film thickness tends to infinity. In this context, the present paper brings the new, original results for the influence of the surface on the properties of long-range ordering in alloy thin films. The long-range order parameter and the concentration distribution, mutually dependent, depend on the film thickness and the boundary conditions at the surfaces. First of all, the interesting phenomenon, surface disordering, is discussed in analogy to the surface melting. Moreover, an interpretation of the disordering kinetics type is proposed in connection with the behaviour of disorder which appears as layer by layer process starting from the surface planes. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000189038200065 L2 - thin films;alloys;order-disorder phase transition;surface disordering;ENERGY ELECTRON-DIFFRACTION; PHASE-TRANSITIONS; SURFACE SO - Physica B-Condensed Matter 2004 ;344(1-4):477-488 10015 UI - 6367 AU - Alvarado JA AU - Betanzos A AU - Franse-Carman L AU - Chen J AU - Gonzalez-Mariscal L AD - Univ Calif San Francisco, Dept Ophthalmol, San Francisco, CA 94143, USACINVESTAV, Ctr Res & Adv Studies, Dept Physiol Biophys & Neurosci, Mexico City 07000, DF, MexicoAlvarado, JA, Univ Calif San Francisco, Dept Ophthalmol, 10 Koret Way, San Francisco, CA 94143 USA TI - Endothelia of Schlemm's canal and trabecular meshwork: distinct molecular, functional, and anatomic features AB - The purpose of this study was to compare human endothelial cells from Schlemm's canal (SCEs) and the trabecular meshwork (TMEs) in terms of ZO-1 isoform expression, hydraulic conductivity (HC) properties, and "giant" vacuole (GV) formation. The principal study methods were Western blot, RT-PCR, immunofluorescence, and perfusion chambers. Blot signals for alpha(+)- and alpha(-)-isoforms were similar in SCEs but less intense for the alpha(+)-relative to the alpha(-)-signal in TMEs. With the anti-alpha(+) antibody used at 1/50 dilution, binding occurred at cell borders of both cell types, but only to SCEs when used at a greater than or equal to 1/200 dilution in vitro and in vivo. SCEs were more resistive than TMEs (HC = 0.66 vs. 1.32 mul . min(-1) . mmHg(-1) . cm(-2); P < 0.001) when perfused from apex to base. When perfused in the other direction, SCEs were again more resistive (5.23 vs. 9.04 μl &BULL; min(-1) &BULL; mmHg(-1) &BULL; cm(-2); P < 0.01). GV formation occurred only in SCEs as a function of flow direction, perfusion pressure, and time. We conclude that SCEs and TMEs have distinctive phenotypic properties involving their content of ZO-1 isoforms, barrier function, and GV formation MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Cell Biology;Physiology U5 - J;Article AV - English IS - 0363-6143 UR - ISI:000188707600020 L2 - tight junctions;ZO-1;giant vacuoles;conductivity;JUNCTION PROTEIN ZO-1; AQUEOUS OUTFLOW SYSTEM; TIGHT-JUNCTION; HUMAN EYES; ACTIN CYTOSKELETON; ZONULA-OCCLUDENS; MDCK CELLS; EXPRESSION; PERMEABILITY; RESISTANCE SO - American Journal of Physiology-Cell Physiology 2004 ;286(3):C621-C634 10016 UI - 3187 AU - Alvarez F AU - Villalobos JL AU - Iliffe TM AD - Univ Nacl Autonoma Mexico, Inst Biol, Collecc Nacl Crustaceos, Mexico City 04510, DF, MexicoTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USAAlvarez, F, Univ Nacl Autonoma Mexico, Inst Biol, Collecc Nacl Crustaceos, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - A new species of Agostocaris (Caridea : Agostocarididae) from Acklins Island, Bahamas AB - The new bresilioid shrimp Agostocaris acklinsensis is described from an anchialine cave in Acklins Island, Bahamas. This is the third species described in the genus. The new species is characterized by having small exopods on the third and fourth pereiopods, one spine on the ischium of the fifth pereiopod, and an outer ramus of the uropods with one distolateral spine. A key to the species of Agostocaris is provided MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: BIOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0006-324X UR - ISI:000226880200013 L2 - NORTH-ATLANTIC; SHRIMPS; FAMILY SO - Proceedings of the Biological Society of Washington 2004 ;117(3):368-376 10017 UI - 4791 AU - Alvarez G AU - Arce J AU - Lira L AU - Heras MR AD - Ctr Nacl Invest & Desarrollo Tec, SNIT, SEP, Dept Mech Engn, Cuernavaca 62050, Morelos, MexicoCIEMAT, E-28040 Madrid, SpainAlvarez, G, Ctr Nacl Invest & Desarrollo Tec, SNIT, SEP, Dept Mech Engn, Apdo Postal 5-164, Cuernavaca 62050, Morelos, Mexico TI - Thermal performance of an air solar collector with an absorber plate made of recyclable aluminum cans AB - The present paper describes the development and testing of an efficient single-glass air solar collector with an absorber plate made of recyclable aluminum cans (RAC). This collector was designed as a proposal to use recycle recyclable materials to build absorber plates of air solar collectors at an acceptable cost. The absorber plate of the collector consisted of eight circular cross section air flow channels of 128 recyclable aluminium cans. Each channel was built with 16 recyclable cans blackened with common opaque black paint of 0.903 absorptance and 0.097 reflectance. The design parameters to determine the size of the collector were obtained by implementing a simulation model for double flow air solar collectors. Also, to determine the appropriate configuration for a uniform air flow distribution inside the eight RAC air channels, a hydrodynamic numerical study was carried out. The RAC air solar collector designed and built was tested outdoors following the ASHRAE 93-86 standard to determine the time constant, the thermal efficiency and the incidence angle modifier. Comparison between the predicted theoretical temperatures and the measured ones were in good agreement. Comparison between the thermal efficiency of the RAC air solar collector with the ones reported in the literature is presented. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels U5 - J;Article AV - English IS - 0038-092X UR - ISI:000223016400012 L2 - solar air heaters;flat plate collectors;recyclable cans;HEATERS; SYSTEMS SO - Solar Energy 2004 ;77(1):107-113 10018 UI - 4541 AU - Alvarez JL AU - Salinas-Stefanon E AU - Orta G AU - Ferrer T AU - Talavera K AU - Galan L AU - Vassort G AD - CHU Arnaud Villeneuve, INSERM, U390, F-34295 Montpellier 5, FranceInst Cardiol & Cirugia Cardiovasc, Havana, CubaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoVassort, G, CHU Arnaud Villeneuve, INSERM, U390, 371 Ave Doyen Gaston Giraud, F-34295 Montpellier 5, France TI - Occurrence of a tetrodotoxin-sensitive calcium current in rat ventricular myocytes after long-term myocardial infarction AB - Objective: To determine the characteristics of a TTX-sensitive Ca2+ current that occurred only following remodelling after myocardial infarction in Wistar rat. Methods: Using the whole-cell patch-clamp technique, we studied ionic inward current in myocytes isolated from four different ventricular regions of control Wistar rat hearts, or from hearts 4 to 6 months after ligation of the left coronary artery. Inward current characteristics were also analysed in Xenopus laevis oocytes that heterologously expressed the human sodium channel a-subunit Nav1.5. The effects of oxidative stress by hydrogen peroxide or tert-butyl-hydroxyperoxide as well as those of PKA-dependent phosphorylation, which partly mimic the pathological conditions, were investigated on control cardiomyocytes and Nav1.5-expressing oocytes. Results: In Na-free solution, a low-threshold, tetrodotoxin-sensitive inward current was found in 20 out of 78 cells isolated from 16 post-myocardial infarcted (PMI) cardiomyocytes but not in cardiomyocytes from young and sham rat hearts. This current exhibited kinetics and pharmacological properties similar to the I-Ca(TTX) current previously reported. I-Ca(TTX)-like current was critically dependent on extracellular Na+ and was reduced by micromolar Na+ concentrations. Neither in normal rat cardiornyocytes nor in Nav1.5-expressing oocytes could a ICa(TTX)-like current be elicited in Na+-free extracellular solution, even after oxidative stress or PKA-dependent phosphorylation. Conclusions: Our data suggest that I-Ca(TTX)-like current in PMI myocytes does not arise from classical Na+ channels modified by oxidative stress or PKA phosphorylation and most probably represents a different Na+ channel type re-expressed in some cells after remodelling. (C) 2004 European Society of Cardiology. Published by Elsevier B.V. All rights reserved MH - Cuba MH - France MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0008-6363 UR - ISI:000223591400012 L2 - arrhythmia;heart failure;Na-channel;oxidative phosphorylation;remodelling;CARDIAC NA+ CHANNELS; BETA-ADRENERGIC STIMULATION; OXIDATIVE STRESS; SODIUM-CHANNELS; IONIC MECHANISM; CA2+; HEART; HYPERTROPHY; FAILURE; ARRHYTHMIAS SO - Cardiovascular Research 2004 ;63(4):653-661 10019 UI - 3885 AU - Alvarez L AU - Fuentes O AU - Terlevich R AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, Mexico. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England TI - Extracting stellar population parameters of galaxies from photometric data using evolution strategies and locally weighted linear regression AB - There is now a huge amount of high quality photometric data available in the literature whose analysis is bound to play a fundamental role in studies of the formation and evolution of structure in the Universe. One important problem that this large amount of data generates is the definition of the best procedure or strategy to achieve the best result with the minimum of computational time. Here we focus on the optimization of methods to obtain stellar population parameters (ages, proportions, redshift and reddening) from photometric data using evolutionary synthesis models. We pose the problem as an optimization problem and we solve it with Evolution Strategies (ES). We also test a hybrid algorithm combining Evolution Strategies and Locally Weighted Linear Regression (LWLR). The experiments show that the hybrid algorithm achieves greater accuracy, and faster convergence than evolution strategies. On the other hand the performance of ES and ES-LWLR is similar when noise is added to the input data MH - United Kingdom MH - Mexico|Puebla T3 - KNOWLEDGE-BASED INTELLIGENT INFORMATION AND ENGINEERING SYSTEMSLecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlelochoa@ccc.inaoep.mx fuentes@inaoep.mx rjt@inaoep.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBB77 AV - English IS - 0302-9743 UR - ISI:000224585500053 SO - 2004 ;():395-403 10020 UI - 6333 AU - Alvarez L AU - Espino J AU - Ornelas C AU - Rico JL AU - Cortez MT AU - Berhault G AU - Alonso G AD - Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, MexicoUMSNH, Fac Ingn Quim, Lab Catalisis, Inst Invest Met, Morelia 58000, Michoacan, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Poitiers, UMR 6503 CNRS, Catalyse Chim Organ Lab, F-86000 Poitiers, FranceAlonso, G, Ctr Invest Mat Avanzados, Dept Catalisis, Chihuahua 31109, Mexico TI - Comparative study of MoS2 and Co/MoS2 catalysts prepared by ex situ in situ activation of ammonium and tetraalkylammonium thiomolybdates AB - Ex situ and in situ decompositions of ammonium and tetraalkylammonium thiomolybdates were used to synthesize unsupported MoS2 and CoMo catalysts. The ex situ activation was performed under a H2S/H-2 flow whereas the in situ activation consists in decomposing the thiosalt precursors in the presence of a hydrocarbon solvent during the hydrodesulfurization (HDS) of dibenzothiophene (DBT). Particular attention was devoted to the use of carbon-containing precursors and to the synergetic effect of cobalt. Ammonium thiomolybdate (ATM), tetramethylammonium thiomolybdate (TMATM), and tetrapropylammonium thiomolybdate (TPATM) and their cobalt-promoted counterparts were studied. Catalysts were characterized by XRD, scanning electron microscopy (SEM) and specific surface area measurements (BET, BJH). Catalysts were evaluated for the HDS of DBT. The in situ method of preparation allows to obtain catalysts with larger superficial areas than those obtained with the ex situ method. The cobalt synergetic effect depends both on the method of activation and the presence of carbon in the precursor. For in situ activated catalysts, the promotional effect of cobalt is well-observed if carbon is present in the precursor while an opposite effect is shown for ex situ activated catalysts. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000188740000014 L2 - ex situ/in situ activation;unsupported;promotion;hydrodesulfurization;MoS2;MOLYBDENUM SULFIDE CATALYSTS; TRANSITION-METAL SULFIDES; HYDRODESULFURIZATION CATALYSTS; HYDROTREATING CATALYSTS; ALUMINA CATALYSTS; AQUEOUS-SOLUTION; HYDROGENATION; MODEL; THIOTUNGSTATES; DECOMPOSITION SO - Journal of Molecular Catalysis A-Chemical 2004 ;210(1-2):105-117 10021 UI - 3835 AU - Alvarez LG AU - Jones SE AD - CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoMarine Sci Labs, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, WalesAlvarez, LG, CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, Mexico TI - Short-term observations of suspended particulate matter in a macro-tidal inverse estuary: The Upper Gulf of California AB - Studies on suspended matter in inverse estuaries are relatively scarce compared with similar studies in classic estuaries. The longitudinal circulation pattern in such estuaries is opposite to that observed in classic estuaries and may significantly affect the transport of suspended sediments. The Upper Gulf of California is a macrotidal inverse estuary having negligible river input but sustaining a high concentration of suspended matter, mainly derived from erosion of bed sediments. The amount of suspended particulate matter in the water column is controlled by tidal resuspension. On the western side of the Upper Gulf, horizontal fluxes of suspended particulate matter integrated between I m and 5 m above the bed were influenced by near-bed density-driven flow during neap tides. Maximum neap tide fluxes during ebb tide were - 21.5 g(.)m(-1.)s(-1) to -24.9 g(.)m(-1.)s(-1) while peak fluxes during flood tide were one order of magnitude smaller. The loss of suspended sediment to deeper water was controlled by gravity currents, which are typical of the near-bed circulation of inverse estuaries. Similar outflow from the Upper Gulf was not observed on the eastern side MH - Mexico|Baja California MH - United Kingdom PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000225203600002 L2 - suspended sediment flux;tidal resuspension;gravity currents;COLORADO RIVER DELTA; SOUTHERN NORTH-SEA; STRATIFICATION; SEDIMENTATION; FLUX SO - Journal of Coastal Research 2004 ;20(3):645-654 10022 UI - 5120 AU - Ambrosio R AU - Torres A AU - Kosarev A AU - Ilinski A AU - Zuniga C AU - Abramov AS AD - INAOE, Puebla, MexicoBUAP Puebla, Puebla 72050, MexicoAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaAmbrosio, R, INAOE, Apdo P-51 & 216,POB 72000, Puebla, Mexico TI - Low frequency plasma deposition and characterization of Si1-xGex : H,F films AB - Si-Ge alloys have been widely studied because of their wide spread applications. RF discharge is a conventionally adopted technique for the deposition of Si-Ge films. Little is known about the deposition and properties of Si-Ge films in low frequency plasmas. The present work concerns an investigation of growth, structure and electronic properties of a-Si1-xGex films deposited by low frequency PECVD, where x is the Ge content in the gas phase, from SiH4 and GeF4 as source gases, and H-2 and Ar for dilution. There is no deposition of the film without dilution, while in both cases of H- and Ar-dilution, the growth is observed over the entire x range. However, the deposition rate depends on x and decreases faster in the case of Ar dilution. Both, SIMS and Raman spectra data, demonstrate that incorporation of Ge in the solid phase reaches saturation at x approximate to 0.5. In Raman spectra, the scattering related to Si crystalline phase (line at k = 520 cm(-1)) increases and new lines in vicinity of k = 480 cm-1 appear with x. It suggests a change in the local structure around Si atoms. The electrical properties were studied by measurements of the temperature dependence of the conductivity. The reduction of the activation energy from 0.86 to 0.39 eV and the increase of room temperature conductivity from 1 x 10(-9) to 2.1 x 10(-4) Omega(-1) cm(-1) were observed with the changes of x from 0 (Si) to I (Ge). No correlation between pre-exponent factor of conductivity sigma(0) and activation energy was observed in the samples studied in contrast with a-Si-Ge films deposited from mixtures with GeH4. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000222219000018 L2 - SILICON-GERMANIUM ALLOYS; AMORPHOUS-SILICON; SEMICONDUCTORS SO - Journal of Non-Crystalline Solids 2004 ;338-40():91-96 10023 UI - 4698 AU - Amero JM AU - Vazquez GJ AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoUniv Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, FranceVazquez, GJ, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, AP-48-3, Cuernavaca 62210, Morelos, Mexico TI - New bound electronic states of NH+ AB - Ab initio MRD-CI electronic structure calculations were carried out on the NH+ cation. A basis set of DZ + POL quality augmented with Rydberg and bond functions was employed, together with an extensive treatment of electron correlation. We find four new bound electronic states of NH+, namely, three doublets ((2)Delta, (2)Sigma(+), (2)Sigma(+)) and one sextet ((II)-I-6). A fifth bound electronic state, a quartet ((II)-I-4) that was reported schematically in an early SCF study (Liu, H. P. D.; Verhaegen, G. J Chem Phys 1970, 53(2), 735), is calculated for the first time over a wide range of N-H distances. Electronic energies, potential energy curves, and spectroscopic constants are reported for these five states. Vertical and adiabatic excitation and ionization energies are reported, as well as vertical de-excitation energies for emission from the novel states to lower-lying bound states. The potential energy curve of NH2+ (X1Sigma(+)) was also calculated to aid in the discussion of a Rydberg bound state of NH+. It is hoped that the information reported in this article will be helpful in guiding the experimental detection of these species. (C) 2004 Wiley Periodicals, Inc MH - France MH - Mexico|Morelos PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000223189000020 L2 - NH+;ab initio;electronic spectroscopy;astrophysics;N=3,4 RYDBERG STATES; CH MOLECULE; INTERSTELLAR CLOUDS; EXCITED-STATES; ZETA-OPHIUCHI; CONFIGURATION-INTERACTION; VIBRATIONAL FREQUENCIES; DIATOMIC-MOLECULES; UMIST DATABASE; VALENCE STATES SO - International Journal of Quantum Chemistry 2004 ;99(4):353-372 10024 UI - 4464 AU - Amore P AU - Aranda A AU - De Pace A AU - Lopez JA AD - Univ Colima, Fac Ciencias, Colima, MexicoIst Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyUniv Texas, Dept Phys, El Paso, TX 79968, USAAmore, P, Univ Colima, Fac Ciencias, Bernal Diaz Castillo 340, Colima, Mexico TI - Comparative study of quantum anharmonic potentials AB - We perform a study of various anharmonic potentials using a recently developed method. We calculate both the wave functions and the energy eigenvalues for the ground and first excited states of the quartic, sextic and octic potentials with high precision, comparing the results with other techniques available in the literature. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Colima MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000223670600008 L2 - anharmonic oscillator;quantum mechanics;optimized perturbation theory;OPTIMIZED PERTURBATION-THEORY; EXPANSION; APPROXIMATIONS; CONVERGENCE; OSCILLATORS; EQUATION; SYSTEMS SO - Physics Letters A 2004 ;329(6):451-458 10025 UI - 5877 AU - Amore P AU - Aranda A AU - De Pace A AD - Univ Colima, Fac Ciencias, Colima, Colima, MexicoIst Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyAmore, P, Univ Colima, Fac Ciencias, Bernal Diaz Castillo 340, Colima, Colima, Mexico TI - A new method for the solution of the Schrodinger equation AB - We present a new method for the solution of the Schrodinger equation applicable to problems of a non-perturbative nature. The method works by identifying three different scales in the problem, which then are treated independently: an asymptotic scale, which depends uniquely on the form of the potential at large distances; an intermediate scale, still characterized by an exponential decay of the wavefunction; and, finally, a short distance scale, in which the wavefunction is sizable. The notion of optimized perturbation is then used in the last two regimes. We apply the method to the quantum anharmonic oscillator and find it suitable to treat both energy eigenvalues and wavefunctions, even for strong couplings MH - Italy MH - Mexico|Colima PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000220470200016 L2 - OPTIMIZED DELTA-EXPANSION; CONNECTED VACUUM AMPLITUDE; QUANTUM-FIELD THEORY; ANHARMONIC-OSCILLATOR; PERTURBATION-THEORY; INTERPOLATING ACTIONS; CONVERGENT SEQUENCES; ZERO DIMENSIONS; APPROXIMATIONS; PROOF SO - Journal of Physics A-Mathematical and General 2004 ;37(10):3515-3525 10026 UI - 4975 AU - Anacona JR AU - Gutierrez C AU - Rodriguez-Barbarin C AD - Univ Oriente, Dept Quim, Cumana, VenezuelaUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, MexicoAnacona, JR, Univ Oriente, Dept Quim, Cumana, Venezuela TI - Crystal structure and superoxide dismutase activity of [Cu(ethylenediamine)(2)Cl][PF6] AB - The preparation, spectroscopic properties, and crystal structure of chlorobis(ethylenediamine)copper(II) hexafluorophosphate [Cu(en)(2)Cl][PF6], (en=ethylendiamine) are reported. The complex crystallizes in the monoclinic system, space group P2(1)/c, with cell constants a=6.1488(9) Angstrom, b=12.696(2) Angstrom, c=17.7424(17) Angstrom, beta=97.265(12), and Z=4. The copper(II) ion is coordinated to two bidentate en molecules, to one chlorine ion, and to a more distant fluorine atom of the PF6 group, leaving the copper ion in a distorted octahedral coordination geometry. The superoxide dismutase mimetic activity of the complex was investigated using the indirect xanthine-xanthine oxidase-nitroblue tetrazolium method and compared to that of the native enzyme MH - Mexico|Nuevo Leon MH - Venezuela PB - VIENNA: SPRINGER WIEN RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0026-9247 UR - ISI:000222607900004 L2 - copper;superoxide dismutase activity;COPPER(II) COMPLEXES; METAL-COMPLEXES; ANTIINFLAMMATORY DRUGS; COORDINATION BEHAVIOR; PULSE-RADIOLYSIS; 1,10-PHENANTHROLINE; SULFATHIAZOLE; COMPOUND SO - Monatshefte fur Chemie 2004 ;135(7):785-792 10027 UI - 3699 AU - Ancheyta J AU - Froment GF AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAAncheyta, J, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - International Symposium on Advances in Hydroprocessing of Oil Fractions (ISAHOF 2004) - Preface MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Editorial Material AV - English IS - 0920-5861 UR - ISI:000225613500001 SO - Catalysis Today 2004 ;98(1-2):1-1 10028 UI - 4275 AU - Andersson N AU - Ho-Foster A AU - Matthis J AU - Marokoane N AU - Mashiane V AU - Mhatre S AU - Mitchell S AU - Mokoena T AU - Monasta L AU - Ngxowa N AU - Salcedo MP AU - Sonnekus H AD - Univ Autonoma Guerrero, CIET, Acapulco, MexicoCIETafrica, ZA-2041 Houghton, South AfricaAndersson, N, Univ Autonoma Guerrero, CIET, Apdo Postal 182, Acapulco, Mexico TI - National cross sectional study of views on sexual violence and risk of HIV infection and AIDS among South African school pupils AB - Objective To investigate the views of school pupils on sexual violence and on the risk of HIV infection and AIDS and their experiences of sexual violence. Design National cross sectional study. Setting 5162 classes in 1418 South African schools. Participants 269 705 pupils aged 10-19 years in grades 6-11. Main outcome measure Answers to questions about sexual violence and about the risk of HIV infection and AIDS. Results Misconceptions about: sexual violence were common among both sexes, but more females held views that would put them at high risk of HIV infection. One third of the respondents thought they might be HIV positive. This was associated with misconceptions about sexual violence and about the risk of HIV infection and AIDS. Around 11% of males and 4% of females claimed to have forced someone else to have sex; 66% of these males and 71% of these females had themselves been forced to have sex. A history of forced sex was a powerful determinant of views on sexual violence and risk of HIV infection. Conclusions The views of South African youth on sexual violence and on the risk of HIV infection and AIDS were compatible with acceptance of sexual coercion and "adaptive" attitudes to survival in a violent society. Views differed little between the sexes MH - Mexico|Guerrero MH - South Africa PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 4 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0959-535X UR - ISI:000224773200018 L2 - GENDER; HEALTH; WOMEN; YOUTH; ADOLESCENTS; PREVENTION; PREVALENCE; EDUCATION; HIV/AIDS; BEHAVIOR SO - British Medical Journal 2004 ;329(7472):952-954A 10029 UI - 5236 AU - Andrade E AU - Flores M AU - Muhl S AU - Barradas NP AU - Murillo G AU - Zavala EP AU - Rocha MF AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Guadalajara, CUCEI, Dept Ingn Proyectos, Zapopan Jal, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoInst Tecnol & Nucl, P-2685 Socavem, PortugalInst Nacl Invest Nucl, Depto Acelerador, George Town 11800, MalaysiaIPN, Escuela Super Ingn Mecan & Elect, Mexico City 07738, DF, MexicoAndrade, E, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Ion beam analysis of TiN/Ti multilayers deposited by magnetron sputtering AB - TiN/Ti multilayers, 1.74-9.80 mum thick, were deposited on 304 stainless steel substrates by reactive unbalanced magnetron sputtering. It is known that such multilayers can improve the corrosion resistance of the stainless steel. The titanium layers help to reduce the occurrence of pinholes that arise because of the irregularities in substrate surface, and decrease the porosity of subsequent TiN coatings by improving the layers microstructure. A 1400 keV deuterium beam was used to analyse the samples and combinations of RBS/NRA methods were applied to evaluate the sample spectra. The N-14(d,alpha(1)) C-12 NR cross sections are well known and were used as way to determine the N-14 concentration in the TiN, layers. The corrosion resistance of the layers was studied by means of potentiodynamic polarization in a 0.5 M NaCl solution. The corrosion test demonstrated that the number of TiN/Ti layers and its total thickness determine the corrosion resistance. (C) 2004 Elsevier B.V. All rights reserved MH - Malaysia MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Portugal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000221895800144 L2 - reactive magnetron sputtering;TiN/Ti thin films;IBA methods;corrosion resistance SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2004 ;219-20():763-767 10030 UI - 5237 AU - Andrade E AU - Chromik A AU - Jergel M AU - Jergel M AU - Falcony C AU - Strbik V AU - Rocha MF AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaCINVESTAV, IPN, Dept Fis, Mexico City, DF, MexicoIPN, ESIME, Mexico City 07738, DF, MexicoAndrade, E, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Elemental depth profiles of MgB2/Si precursor and superconducting films AB - The elemental composition and depth profiles of MgB2/Si(1 0 0) and MbB(2)/Si(1 1 1) films were studied by IBA methods. Films were prepared by sequential e-beam evaporation of B and Mg components onto silicon substrates kept at room temperature. One half of the Mg-B precursors were then annealed in situ at 630 degreesC to obtain superconducting MgB2 films. Both types of films, i.e. not-annealed as well as those annealed, were then bombarded with 2400 keV He-3(+). Nuclear reaction particle peaks with positive Q values are induced by He-3(+) bombardment on (OB)-O-10, B-11, O-16 and C-12 nuclei. The IBA method applied is actually a combination of Rutherford backscattering/nuclear reaction (RBS/NRA) for analyzing MgB2/Si films. The best zero resistance T-co value of the MgB2/Si superconducting films was 29.3 K. The IBA of the MgB2/Si superconducting films shows that Mg and B diffuse into the silicon substrate and that the Mg concentration on the film surface is almost zero. X-ray diffraction indicates that Mg2Si grains were formed at the film/substrate interface. Low concentrations of oxygen were also found in the films either in the form of MgO or B2O3. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000221895800145 L2 - E-beam deposition;MgB;thin films;IBA methods;depth profiles;THIN-FILMS SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2004 ;219-20():768-772 10031 UI - 5935 AU - Andreola F AU - Calvisi DF AU - Elizondo G AU - Jakowlew SB AU - Mariano J AU - Gonzalez FJ AU - De Luca LM AD - NCI, Cellular Carcinogenesis & Tumor Promot Lab, Ctr Canc Res, NIH, Bethesda, MD 20892, USANCI, Expt Carcinogenesis Lab, Ctr Canc Res, NIH, Bethesda, MD 20892, USAIPN, CINVESTAV, Secc Externa Toxicol, Mexico City 07738, DF, MexicoNCI, Lab Cell & Canc Biol Branch, Ctr Canc Res, NIH, Rockville, MD, USANCI, Lab Metab, Ctr Canc Res, NIH, Bethesda, MD 20892, USADe Luca, LM, NCI, Cellular Carcinogenesis & Tumor Promot Lab, Ctr Canc Res, NIH, Bldg 37,Room 4054C,37 Convent Dr, Bethesda, MD 20892 USA TI - Reversal of liver fibrosis in aryl hydrocarbon receptor null mice by dietary vitamin A depletion AB - Aryl hydrocarbon receptor (AHR)-null mice display a liver fibrosis phenotype that is associated with a concomitant increase in liver retinoid concentration, tissue transglutaminase type II (TGaseII) activity, transforming growth factorbeta (TGFbeta) overexpression, and accumulation of collagen. To test the hypothesis that this phenotype might be triggered by the observed increase in liver retinoid content, we induced the condition of retinoid depletion by feeding AHR-null mice a vitamin A- deficient diet with the purpose to reverse the phenotype. Liver retinoid content decreased sharply within the first few weeks on the retinoid-deficient diet. Analysis of TGFbeta1, TGFbeta2, and TGFbeta3 expression revealed a reduction to control levels in the AHR -/- mice accompanied by parallel changes in TGaseII protein levels. In addition, we observed an increase in the TGFbeta receptors, TGFbeta RI and TGFbeta RII, as well as in Smad4, and their reduction to wild-type mouse liver levels in AHR -/- mice fed the retinoid-deficient diet. Reduction of peroxisomal proliferator-activated receptor gamma (PPARgamma) messenger RNA (mRNA) and protein levels in AHR -/- mice was consistent with the presence of hepatic stellate cell (HSC) activation and liver fibrosis. Vitamin A deficiency normalized PPARgamma expression in AHR -/- mice. In conclusion, livers from AHR -/- mice fed the vitamin A-deficient diet showed a decrease in collagen deposition, consistent with the absence of liver fibrosis MH - USA MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0270-9139 UR - ISI:000220375400020 L2 - GROWTH-FACTOR-BETA; PROLIFERATOR-ACTIVATED RECEPTORS; STELLATE CELL ACTIVATION; HEPATIC-FIBROSIS; TGF-BETA; RETINOIDS; DISEASE SO - Hepatology 2004 ;39(1):157-166 10032 UI - 6034 AU - Andresen E AU - Levey DJ AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoUniv Florida, Dept Zool, Gainesville, FL 32611, USAAndresen, E, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Apartado Postal 27-3, Morelia 58089, Michoacan, Mexico TI - Effects of dung and seed size on secondary dispersal, seed predation, and seedling establishment of rain forest trees AB - Seeds dispersed by tropical, arboreal mammals are usually deposited singly and without dung or in clumps of fecal material. After dispersal through defecation by mammals, most seeds are secondarily dispersed by dung beetles or consumed by rodents. These post-dispersal, plant-animal interactions are likely to interact themselves, as seeds buried by dung beetles are less likely to be found by rodents than unburied seeds. In a series of three experiments with seeds of 15 species in central Amazonia (Brazil), we determined (1) how presence and amount of dung associated with seeds influences long-term seed fate and seedling establishment, (2) how deeply dung beetles bury seeds and how burial depth affects seedling establishment, and (3) how seed size affects the interaction between seeds, dung beetles, and rodents. Our overall goal was to understand how post-dispersal plant-animal interactions determine the link between primary seed dispersal and seedling establishment. On average, 43% of seeds surrounded by dung were buried by dung beetles, compared to 0% of seeds not surrounded by dung (n=2,156). Seeds in dung, however, tended to be more prone than bare seeds to predation by rodents. Of seeds in dung, probability of burial was negatively related to seed size and positively related to amount of dung. Burial of seeds decreased the probability of seed predation by rodents three-fold, and increased the probability of seedling establishment two-fold. Mean burial depth was 4 cm (0.5-20 cm) and was not related to seed size, contrary to previous studies. Probability of seedling establishment was negatively correlated with burial depth and not related to seed size at 5 or 10 cm depths. These results illustrate a complex web of interactions among dung beetles, rodents, and dispersed seeds. These interactions affect the probability of seedling establishment and are themselves strongly tied to how seeds are deposited by primary dispersers. More generally, our results emphasize the importance of looking beyond a single type of plant-animal interaction (e.g., seed dispersal or seed predation) to incorporate potential effects of interacting interactions MH - Mexico|Michoacan MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 11 U4 - Ecology U5 - J;Article AV - English IS - 0029-8549 UR - ISI:000220097200006 L2 - Central Amazonia;plant-animal interactions;rain forest;seed fate;HOWLER MONKEYS; BEETLES SCARABAEIDAE; ALOUATTA-PALLIATA; LOS-TUXTLAS; HORSE DUNG; RECRUITMENT; ECOLOGY; PLANT; FATE; COMMUNITIES SO - Oecologia 2004 ;139(1):45-54 10033 UI - 6166 AU - Andrzejewska M AU - Yepez-Mulia L AU - Tapia A AU - Cedillo-Rivera R AU - Laudy AE AU - Starosciak BJ AU - Kazimierczuk Z AD - Agr Univ Warsaw, Inst Chem, PL-02787 Warsaw, PolandHosp Pediat Mexico City, Unidad Invest Med Enfermedadas Infecciosas & Para, IMSS, Ctr Med Natl Siglo XXI, Mexico City 06725, DF, MexicoUniv Autonoma Yucatan, Inst Mexicano Seguro Social, Unidad Interinstituc Invest Med, Merida, Yuc, MexicoWarsaw Med Univ, Dept Pharmaceut Microbiol, PL-02007 Warsaw, PolandPolish Acad Sci, Med Res Ctr, Lab Expt Pharmacol, PL-02106 Warsaw, PolandKazimierczuk, Z, Agr Univ Warsaw, Inst Chem, 159C Nowoursynowska St, PL-02787 Warsaw, Poland TI - Synthesis, and antiprotozoal and antibacterial activities of S-substituted 4,6-dibromo- and 4,6-dichloro-2-mercaptobenzimidazoles AB - The synthesis and some germicidal activities in vitro of two congener series of S-substituted 4,6-dihalogeno-2-mercapto-1H-benzimidazoles are reported. There was no substantial difference between antibacterial activities of corresponding 4,6-dichloro- and 4,6-dibromo-derivatives. The present results confirm lower susceptibility to substituted benzimidazoles of Gram-negative compared to Gram-positive bacteria. Minimum inhibitory concentrations (MICs) of a majority of the novel derivatives ranged between 25 and 100 mug/ml for Gram-positive bacteria. The most active compounds (MICs for Gram-positive bacteria: 0.78-50 mug/ml) were 4,6-dichloro-2-(4-nitrobenzylthio)-1H-benzimidazole and 4,6-dibromo-2-(4-nitrobenzylthio)-1H-benzimidazole that were 4-32 times more potent than nitrofurantoin against all Gram-positive bacteria utilized but Escherichia faecalis, against which they were, respectively, 2 and 4 times less potent than nitrofurantoin. Among Gram-negative bacteria used, Stenotrophomonas maltophilia and Bordetella bronchiseptica were most sensitive (as evidenced by a number of MICs less than or equal to 100 mug/ml), whereas Pseudomonas aeruginosa was most resistant to the new benzimidazole derivatives (all MICs > 400 mug/ml). All the new compounds were at least several times more active against Giardia intestinalis (IC50: 0.006-0.053 mug/ml), and a half of them were at least several times more active against Trichomonas vaginalis (IC50: 0.0015-0.182 mug/ml) than metronidazole (IC50: 0.210 and 0.037 mug/ml, respectively), the drug of choice in the treatment of G. intestinalis and T. vaginalis infections. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0928-0987 UR - ISI:000189093300024 L2 - 4,6-dihalogeno-2-mercaptobenzimidazoles;antibacterial activity;antiprotozoal activity;genotoxicity;ANTIMICROBIAL ACTIVITY; BENZIMIDAZOLE DERIVATIVES; CASEIN KINASES; AGENTS; 2-TRIFLUOROMETHYLBENZIMIDAZOLES SO - European Journal of Pharmaceutical Sciences 2004 ;21(2-3):323-329 10034 UI - 4750 AU - Angeles G AU - Bond B AU - Boyer JS AU - Brodribb T AU - Brooks JR AU - Burns MJ AU - Cavender-Bares J AU - Clearwater M AU - Cochard H AU - Comstock J AU - Davis SD AU - Domec JC AU - Donovan L AU - Ewers F AU - Gartner B AU - Hacke U AU - Hinckley T AU - Holbrook NM AU - Jones HG AU - Kavanagh K AU - Law B AU - Lopez-Portillo J AU - Lovisolo C AU - Martin T AU - Martinez-Vilalta J AU - Mayr S AU - Meinzer FC AU - Melcher P AU - Mencuccini M AU - Mulkey S AU - Nardini A AU - Neufeld HS AU - Passioura J AU - Pockman WT AU - Pratt RB AU - Rambal S AU - Richter H AU - Sack L AU - Salleo S AU - Schubert A AU - Schulte P AU - Sparks JP AU - Sperry J AU - Teskey R AU - Tyree M AD - US EPA, Corvallis, OR 97333, USAInst Ecol AC, Mexico City, DF, MexicoOregon State Univ, Corvallis, OR 97331, USAUniv Delaware, Newark, DE 19716, USAHarvard Univ, Cambridge, MA 02138, USAUniv Minnesota, Minneapolis, MN 55455, USAHortRes, Auckland, New ZealandINRA, Clermont Ferrand, FranceCornell Univ, Ithaca, NY 14853, USAPepperdine Univ, Malibu, CA 90265, USAUniv Georgia, Athens, GA 30602, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Utah, Salt Lake City, UT 84112, USAUniv Washington, Seattle, WA 98195, USAUniv Dundee, Dundee DD1 4HN, ScotlandUniv Idaho, Moscow, ID 83843, USAUniv Turin, I-10124 Turin, ItalyUniv Florida, Gainesville, FL 32611, USAUniv Edinburgh, Edinburgh EH8 9YL, Midlothian, ScotlandInnsbruck Univ, A-6020 Innsbruck, AustriaUS Forest Serv, Portland, OR, USAIthaca Coll, Ithaca, NY 14850, USAAppalachian State Univ, Boone, NC 28608, USACSIRO Plant Ind, Canberra, ACT, AustraliaUniv New Mexico, Albuquerque, NM 87131, USACNRS, Montpellier, FranceUniv Vienna, Inst Bot, A-1030 Vienna, AustriaUniv Hawaii, Honolulu, HI 96822, USAUniv Nevada, Reno, NV 89557, USAUS Forest Serv, Burlington, VT, USABrooks, JR, US EPA, Corvallis, OR 97333, USA TI - The Cohesion-Tension theory MH - Australia MH - Austria MH - France MH - Italy MH - Mexico|Distrito Federal MH - New Zealand MH - United Kingdom MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Letter AV - English IS - 0028-646X UR - ISI:000223056600003 L2 - cohesion-tension theory;Tansley reviews;long-distance transport;water transport;xylem;NEGATIVE XYLEM PRESSURES; SCHOLANDER ASSUMPTION; WATER ASCENT; SAP ASCENT; PLANTS; CHAMBER; LEAVES; CONTROVERSIES; TREES SO - New Phytologist 2004 ;163(3):451-452 10035 UI - 5368 AU - Angeles G AU - Owens SA AU - Ewers FW AD - Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824, USAMichigan State Univ, Ctr Adv Microscopy, E Lansing, MI 48824, USAInst Ecol, AC Depto Prod Forestales & Conservac Bosques, Xalapa 91070, Veracruz, MexicoEwers, FW, Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA TI - Fluorescence shell: A novel view of sclereid morphology with the Confocal Laser Scanning Microscope AB - Confocal Laser Scanning Microscopy (CLSM) was used to observe sclereids from stems of Avicennia germinans and from fruits of two species of pear (Pyrus calleryana "Bradford" and P. communis "Red Bartlett"). The images obtained from thick (25 to 100 mum) free-hand sections were, in certain respects, far superior to those obtained by other, more invasive and time-consuming microscopic techniques upon which previous reports of sclereid morphology were based. The cell wall surfaces, including the "internal" surfaces of the branched pit canals and cell lumens, were much accentuated with the techniques we describe, resulting in a "fluorescence shell" image, meaning the cell wall did not stain all the way through but instead only at the inner and outer wall surfaces, including the edges of ramiform pits. By controlling the time of staining with 1% aqueous Safranin O, or by changing the number of optical sections used in extended focus images, it was possible to get either a conventional view of the cell wall structure or a unique, three-dimensional view of the elaborate cell interconnections. Similar fluorescence shell images of sclereids were also obtained using a periodic-Schiff (PAS) staining system, but the stain was not as specific to sclereid cell walls as was the Safranin O stain. Particularly with the use of a narrow range band pass emission filter of 505-530 nm, the Safranin O staining may be more specific to lignin than reported in the literature. (C) 2004 Wiley-Liss, Inc MH - Mexico|Veracruz MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Anatomy & Morphology;Biology;Microscopy U5 - J;Article AV - English IS - 1059-910X UR - ISI:000221740600005 L2 - Avicennia germinans;cell walls;CLSM;fluorescence;pear;Pyrus communis;FOLIAR SCLEREIDS SO - Microscopy Research and Technique 2004 ;63(5):282-288 10036 UI - 4146 AU - Angelova MN AU - Dobrev VK AU - Frank A AD - Northumbria Univ, Sch Informat, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, EnglandBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, BulgariaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Mexico City 04510, DF, MexicoAngelova, MN, Northumbria Univ, Sch Informat, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England TI - Revisiting the quantum group symmetry of diatomic molecules AB - We propose a q-deformed model of anharmonic vibrations in diatomic molecules. We study the applicability of the model to the phenomenological Dunham expansion by comparison with experimental data. In contrast with other applications where it is difficult to find a physical interpretation for the deformation parameter, q, in our analysis it is directly related to the third-order coefficient in the Dunham expansion. We study the consistency of the parameters that determine the q-deformed system by comparing them with the vibrational terms fitted to 161 electronic states of diatomic molecules. We show how to include both positive and negative anharmonicities in a simple and systematic way MH - Bulgaria MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000224614900004 L2 - JAYNES-CUMMINGS MODEL; SPECTRA; STATES SO - European Physical Journal D 2004 ;31(1):27-37 10037 UI - 4285 AU - Angenent LT AU - Karim K AU - Al-Dahhan MH AU - Domiguez-Espinosa R AD - Washington Univ, Dept Chem Engn, St Louis, MO 63130, USAWashington Univ, Dept Civil Engn, St Louis, MO 63130, USAWashington Univ, Environm Engn Sci Program, St Louis, MO 63130, USAUniv Yucatan, Dept Chem Engn, Merida 97288, MexicoAngenent, LT, Washington Univ, Dept Chem Engn, 1 Brookings Dr, St Louis, MO 63130 USA TI - Production of bioenergy and biochemicals from industrial and agricultural wastewater AB - The building of a sustainable society will require reduction of dependency on fossil fuels and lowering of the amount of pollution that is generated. Wastewater treatment is an area in which these two goals can be addressed simultaneously. As a result, there has been a paradigm shift recently, from disposing of waste to using it. There are several biological processing strategies that produce bioenergy or biochemicals while treating industrial and agricultural wastewater, including methanogenic anaerobic digestion, biological hydrogen production, microbial fuel cells and fermentation for production of valuable products. However, there are also scientific and technical barriers to the implementation of these strategies MH - Mexico|Yucatan MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 45 U4 - Biotechnology & Applied Microbiology U5 - J;Review AV - English IS - 0167-7799 UR - ISI:000224084800012 L2 - MICROBIAL FUEL-CELL; BIOLOGICAL HYDROGEN-PRODUCTION; IMMOBILIZED SEWAGE-SLUDGE; INSOLUBLE FE(III) OXIDE; BLANKET REACTOR AMBR; ELECTRICITY-GENERATION; ANAEROBIC TREATMENT; BATCH CULTURE; GLUCOSE; FERMENTATION SO - Trends in Biotechnology 2004 ;22(9):477-485 10038 UI - 4463 AU - Anghel M AU - Ben-Zion Y AU - Rico-Martinez R AD - Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87544, USAUniv So Calif, Dept Earth Sci, Los Angeles, CA, USAInst Tecnol Celaya, Dept Chem Engn, Guanajuato, MexicoAnghel, M, Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87544 USA TI - Dynamical system analysis and forecasting of deformation produced by an earthquake fault AB - We present a method of constructing low-dimensional nonlinear models describing the main dynamical features of a discrete 2-D cellular fault zone, with many degrees of freedom, embedded in a 3-D elastic solid. A given fault system is characterized by a set of parameters that describe the dynamics, rheology, property disorder, and fault geometry. Depending on the location in the system parameter space, we show that the coarse dynamics of the fault can be confined to an attractor whose dimension is significantly smaller than the space in which the dynamics takes place. Our strategy of system reduction is to search for a few coherent structures that dominate the dynamics and to capture the interaction between these coherent structures. The identification of the basic interacting structures is obtained by applying the Proper Orthogonal Decomposition (POD) to the surface deformation fields that accompany strike-slip faulting accumulated over equal time intervals. We use a feed-forward artificial neural network (ANN) architecture for the identification of the system dynamics projected onto the subspace (model space) spanned by the most energetic coherent structures. The ANN is trained using a standard back-propagation algorithm to predict (map) the values of the observed model state at a future time, given the observed model state at the present time. This ANN provides an approximate, large-scale, dynamical model for the fault. The map can be evaluated once to provide a short-term predictions or iterated to obtain a prediction for the long-term fault dynamics MH - USA MH - Mexico|Guanajuato PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0033-4553 UR - ISI:000223745800015 L2 - fault dynamics;surface deformation;earthquake prediction;HETEROGENEOUS FAULTS; STRANGE ATTRACTORS; PREDICTABILITY; STRESS; MODELS; TIME; SLIP SO - Pure and Applied Geophysics 2004 ;161(9-10):2023-2051 10039 UI - 5793 AU - Anglada G AU - Rodriguez LF AU - Osorio M AU - Torrelles JM AU - Estalella R AU - Beltran MT AU - Ho PTP AD - CSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainUNAM, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, MexicoCSIC, IEEC, Inst Ciencias Espacio, ES-08034 Barcelona, SpainUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAOsserv Astrofis Arcetri, I-50125 Florence, ItalyAcad Sinica, Inst Astron & Astrophys, Taipei 115, TaiwanAnglada, G, CSIC, Inst Astrofis Andalucia, Camino Bajo de Huetor 24, E-18008 Granada, Spain TI - A single circumstellar disk in the SVS 13 close binary system AB - We present Very Large Array observations at 7 mm of the sources IRAS 2A, IRAS 2B, MMS 2, MMS 3, and SVS 13, in the NGC 1333 region. SVS 13 is a young close binary system whose components are separated by 65 AU in projection. Our high angular resolution observations reveal that only one of the components of the SVS 13 system (VLA 4B) is associated with detectable circumstellar dust emission. This result is in contrast with the well-known case of L1551 IRS 5, a binary system of two protostars separated by 45 AU, where each component is associated with a disk of dust. In both SVS 13 and in L1551 IRS 5 the emission apparently arises from compact accretion disks, smaller than those observed around single stars, but still massive enough to form planetary systems like the solar one. These observational results confirm that the formation of planets can occur in close binary systems, either in one or in both components of the system, depending on the specific angular momentum of the infalling material MH - Italy MH - Mexico|Michoacan MH - Spain MH - Taiwan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000220802000013 L2 - ISM : individual (HH 7-11, NGC 1333;SVS 13);ISM : jets and outflows;radio continuum : ISM;stars : formation;HERBIG-HARO OBJECTS; HH 7-11 REGION; EXCITING SOURCE; PROPER MOTIONS; STAR; VARIABILITY; CONTINUUM; NGC-1333; SSV-13; L1551-IRS-5 SO - Astrophysical Journal 2004 ;605(2):L137-L140 10040 UI - 3617 AU - Anikiev VV AU - Shumilin EN AU - Dudarev OV AU - Botsul AI AU - Zakharova PV AU - Kolesov GM AU - Sapozhnikov DY AU - Smith R AD - Russian Acad Sci, Minist Nat Resources, VNIIGeosyst, Moscow 113105, RussiaCICIMAR, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja California, MexicoRussian Acad Sci, Far E Div, Ilichev Pacific Oceanol Inst, Vladivostok 690041, RussiaRussian Acad Sci, VI Vernadskii Inst Geochem & Analyt Chem, Moscow 119991, RussiaSkidaway Inst Oceanog, Savanna, GA, USAAnikiev, VV, Russian Acad Sci, Minist Nat Resources, VNIIGeosyst, Varshavskoe Sh 8, Moscow 113105, Russia TI - Spatial variability in the distribution of lithological characteristics and chemical elements in the bottom sediments of the South China Sea near the Mekong and Saigon river deltas AB - Spatial variability in the concentrations of 28 chemical elements and organic carbon in bottom sediments was studied to identify the influence of natural processes and the anthropogenic factor on the compositional transformations of terrigenous material in the estuary system of the Mekong and Saigon rivers and the South China Sea. The results of lithogeochemical data processing allowed us to estimate the role of solid river run-off and the fractionation of terrigenous sedimentary material in the formation of spatial structure in the distribution of chemical elements MH - Mexico|Baja California MH - Russia MH - USA PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-7029 UR - ISI:000225942000004 L2 - PARTICULATE MATTER; ESTUARY; WATERS; FRACTIONATION SO - Geochemistry International 2004 ;42(12):1154-1171 10041 UI - 5843 AU - Anzueto A AU - Frutos-Vivar F AU - Esteban A AU - Alia I AU - Brochard L AU - Stewart T AU - Benito S AU - Tobin MJ AU - Elizalde J AU - Palizas F AU - David CM AU - Pimentel J AU - Gonzalez M AU - Soto L AU - D'Empaire G AU - Pelosi P AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Pulm Med Crit Care Med, San Antonio, TX 78284, USAAudie L Murphy Mem Vet Adm Med Ctr, S Texas Vet Hlth Care Syst, San Antonio, TX 78284, USAHosp Univ Getafe, Madrid, SpainHop Henri Mondor, F-94010 Creteil, FranceUniv Toronto, Mt Sinai Hosp, Toronto, ON M5G 1X5, CanadaHosp Santa Cruz & San Pablo, E-08025 Barcelona, SpainUS Dept Vet Affairs, Vet Affairs Edward Hines Jr Hosp, Hines, IL 60141, USALoyola Univ, Chicago, IL 60611, USAHosp ABC, Mexico City, DF, MexicoClin Bazterrica, Buenos Aires, DF, ArgentinaHosp Univ Clementito Fraga Filho, Rio De Janeiro, BrazilUniv Hosp, Coimbra, PortugalHosp Gen Medellin, Medellin, ColombiaInst Nacl Torax, Santiago, ChileHosp Clin, Caracas, VenezuelaUniv Insubria, Hosp Circolo, Varese, ItalyAnzueto, A, 7400 Merton Minter Blvd,11E, San Antonio, TX 78229, USA TI - Incidence, risk factors and outcome of barotrauma in mechanically ventilated patients AB - Objective. To determine the incidence, risk factors, and outcome of barotrauma in a cohort of mechanically ventilated patients where limited tidal volumes and airway pressures were used. Design and setting. Prospective cohort of 361 intensive care units from 20 countries. Patients and participants. A total of 5183 patients mechanically ventilated for more than 12 h. Measurements and results. Baseline demographic data, primary indication for mechanical ventilation, daily ventilator settings, multiple-organ failure over the course of mechanical ventilation and outcome were collected. Barotrauma was present in 154 patients (2.9%). The incidence varied according to the reason for mechanical ventilation: 2.9% of patients with chronic obstructive pulmonary disease; 6.3% of patients with asthma; 10.0% of patients with chronic interstitial lung disease (ILD); 6.5% of patients with acute respiratory distress syndrome (ARDS); and 4.2% of patients with pneumonia. Patients with and without barotrauma did not differ in any ventilator parameter. Logistic regression analysis identified as factors independently associated with barotrauma: asthma [RR 2.58 (1.05-6.50)], ILD [RR 4.23 (95%CI 1.78-10.03)]; ARDS as primary reason for mechanical ventilation [RR 2.70 (95%CI 1.55-4.70)]; and ARDS as a complication during the course of mechanical ventilation [RR 2.53 (95%CI 1.40-4.57)]. Case-control analysis showed increased mortality in patients with barotrauma (51.4 vs 39.2%; p=0.04) and prolonged ICU stay. Conclusions. In a cohort of patients in whom airway pressures and tidal volume are limited, barotrauma is more likely in patients ventilated due to underlying lung disease (acute or chronic). Barotrauma was also associated with a significant increased in the ICU length of stay and mortality MH - Argentina MH - Brazil MH - Canada MH - Chile MH - Colombia MH - France MH - Italy MH - Mexico|Distrito Federal MH - Portugal MH - Spain MH - USA MH - Venezuela PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Critical Care Medicine U5 - J;Article AV - English IS - 0342-4642 UR - ISI:000220562800011 L2 - barotrauma;pneumothorax;mechanical ventilation;tidal volume;PEEP;ARDS;RESPIRATORY-DISTRESS-SYNDROME; ACUTE LUNG INJURY; PULMONARY BAROTRAUMA; MORTALITY; STRATEGY SO - Intensive Care Medicine 2004 ;30(4):612-619 10042 UI - 2741 AU - Apiquian R AU - Fresan A AU - Kiang M AU - Nicolini H AU - Kapur S AD - Natl Inst Psychiat, Mexico City, DF, MexicoMexico City Univ, Mexico City, DF, MexicoUniv Toronto, Toronto, ON, Canada TI - Spontaneous motor activity pattern of schizophrenic patients: Differences according to treatment MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Meeting Abstract AV - English IS - 1461-1457 UR - ISI:000224663001347 SO - International Journal of Neuropsychopharmacology 2004 ;7():S249-S249 10043 UI - 4565 AU - Aposhian HV AU - van Tilburg A AU - Marnell LL AU - Garcia-Vargas GG AU - Chowdhury UK AU - Zakharyan RA AU - Avram MD AU - Silbergeld EK AU - Cebrian ME AD - Univ Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USAUniv Arizona, Ctr Toxicol, Tucson, AZ 85721, USAUniv Juarez Estado Durango Lasalle, Mexico City, DF, MexicoJohns Hopkins Univ, Dept Environm Hlth Sci, Baltimore, MD 21205, USAIPN, Ctr Invest & Estudios Avanzados, Mexico City 07738, DF, Mexico TI - Polymorphisms in the human monomethylarsonic acid [MMA(V)] reductase/hGSTO1 gene and changes in urinary arsenic profiles MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Meeting Abstract AV - English IS - 0041-008X UR - ISI:000222348900421 SO - Toxicology and Applied Pharmacology 2004 ;197(3):254-254 10044 UI - 4772 AU - Aposhian HV AU - van Tilburg A AU - Marnell LL AU - Garcia-Vargas GG AU - Chowdhury UK AU - Zakharyan RA AU - Avram MD AU - Silbergeld EK AU - Cebrian ME AD - Univ Arizona, Dept Mol & Cellular Biol, Tucson, AZ 85721, USAUniv Arizona, Ctr Toxicol, Tucson, AZ 85721, USAUniv Juarez Estado Durango, Lasalle, MexicoJohns Hopkins Univ, Dept Environm Hlth Sci, Baltimore, MD 21205, USAIPN, Ctr Invest & Estudios Avanzados, Mexico City, DF, Mexico TI - Polymorphisms in the human monomethylarsonic acid [MMA(V)] reductase/hGSTO1 gene and changes in urinary arsenic profiles MH - Mexico|Distrito Federal MH - Mexico|Durango MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000221639100765 SO - Faseb Journal 2004 ;18(8):C166-C166 10045 UI - 6418 AU - Aranda JS AU - Salgado E AU - Taillandier P AD - IPN, UPIBI, Unidad Profes Interdisciplinaria Biotecnol, Dept Bioengn, Mexico City, DF, MexicoINP, ENIACET, Lab Genie Chim, F-31077 Toulouse, FranceAranda, JS, IPN, UPIBI, Unidad Profes Interdisciplinaria Biotecnol, Dept Bioengn, Av Acueducto S-N, Mexico City, DF, Mexico TI - Trehalose accumulation in Saccharomyces cerevisiae cells: experimental data and structured modeling AB - Several studies have shown that the reserve disaccharide trebalose also protects yeast cells under environmental stress. Besides, it is acknowledged that trehalose improves yeast viability so its synthesis has become paramount in baker's yeast industry, as well as in wine and beer production. In this work, starving carbon or nitrogen conditions were imposed to Saccharomyces cerevisiae growing in fed-batch cultivations in order to induce biosynthesis and accumulation of trehalose. Our experimental results show that yeast can accumulate trehalose up to 13% of biomass dry weight (0.13 g(trehalose) g(biomass)(-1)) under carbon or nitrogen starvation. A compartmentalized and biochemically structured model is proposed in order to mathematically describe these experimental findings. The model predictions were compared with literature results obtained under growth conditions different from those established in our experiments, resulting in a very good agreement and thus indicating that the proposed hypotheses are essentially correct. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Engineering, Chemical U5 - J;Article AV - English IS - 1369-703X UR - ISI:000188394200008 L2 - Saccharomyces cerevisiae;trehalose;fed-batch cultivation;RESERVE CARBOHYDRATE-METABOLISM; PROMOTER-OPERATOR FUNCTION; FED-BATCH CULTIVATION; CYCLIC-AMP CONTENT; CAMP LEVELS; MULTICOPY PLASMIDS; GENE-EXPRESSION; BAKERS-YEAST; GLYCOGEN; NITROGEN SO - Biochemical Engineering Journal 2004 ;17(2):129-140 10046 UI - 4411 AU - Araya E AU - Hofner P AU - Linz H AU - Sewilo M AU - Watson C AU - Churchwell E AU - Olmi L AU - Kurtz S AD - New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USANatl Radio Astron Observ, Socorro, NM 87801, USATLS Tautenburg, D-07778 Tautenburg, GermanyUniv Wisconsin, Dept Astron, Madison, WI 53706, USACNR, Ist Radioastron, Sez Firenze, I-50125 Florence, ItalyUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoAraya, E, New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA TI - A search for H2CO 6 centimeter emission toward young massive stellar objects AB - A survey for H2CO 6 cm emission toward young massive stellar objects has been conducted using the 305 m Arecibo Telescope. We report detection of emission toward IRAS 18566+0408, only the fifth source in the Galaxy known to show H2CO 6 cm emission. A cross-scan shows that the size of the emitting region is smaller than the C-band Arecibo half-power beamwidth (i.e., theta(s) < 1'). We detect extended H2CO 6 cm absorption around and toward the emitter position. We detect H2CO 6 cm absorption features toward all 15 sources observed. Three of the sources exhibit complex absorption profiles that could be due to absorption partially filled by emission MH - Germany MH - Italy MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000224065000008 L2 - ISM : clouds;ISM : molecules;radio lines : ISM;ULTRACOMPACT HII-REGIONS; INFRARED DARK CLOUDS; NRAO PMN SURVEYS; FORMALDEHYDE MASERS; PROTOSTELLAR CANDIDATES; SOURCE CATALOG; ORION NEBULA; 6-CENTIMETER; NGC-7538; LINE SO - Astrophysical Journal Supplement Series 2004 ;154(2):579-584 10047 UI - 4795 AU - Arce H AU - Montero ML AU - Saenz A AU - Castano VM AD - Univ Costa Rica, Escuela Quim, San Jose, Costa RicaUniv Costa Rica, Ctr Invest Ciencia Ingn Mat, San Jose, Costa RicaUniv Costa Rica, Escuela Fis, San Jose, Costa RicaUNAM, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro, MexicoMontero, ML, Univ Costa Rica, Escuela Quim, San Jose, Costa Rica TI - Effect of pH and temperature on the formation of hydroxyapatite at low temperatures by decomposition of a Ca-EDTA complex AB - Hydroxyapatite (HAp) was synthesized through the decomposition of a Ca(EDTA) complex in presence of phosphate ions. Ion concentrations are much higher than previously reported. This route allows the formation of HAp at temperatures below 140 degreesC and at different pH values. Phase identification, crystallinity and morphology of the obtained products were studied via FTIR, SEM, XRD and EDS. (C) 2004 Elsevier Ltd. All rights reserved MH - Costa Rica MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000222977000006 L2 - hydroxyapatite;complex;EDTA;hydrothermal;low temperature;calcium phosphates;BIOCOMPATIBLE WHISKERS; NANOMETRIC COMPOSITES; CRYSTALLIZATION; PRECIPITATION; MORPHOLOGY; CERAMICS; CHELATE SO - Polyhedron 2004 ;23(11):1897-1901 10048 UI - 5381 AU - Arenas JI AU - Gallegos-Orozco JF AU - Laskus T AU - Wilkinson J AU - Khatib A AU - Fasola C AU - Adair D AU - Radkowski M AU - Kibler KV AU - Nowicki M AU - Douglas D AU - Williams J AU - Netto G AU - Mulligan D AU - Klintmalm G AU - Rakela J AU - Vargas HE AD - Mayo Clin Scottsdale, Div Transplantat Med, Scottsdale, AZ 85259, USABaylor Univ, Med Ctr, Transplantat Serv, Dallas, TX, USAUniv So Calif, Maternal Child Virol Res Lab, Los Angeles, CA, USAMed Acad Warsaw, Warsaw, PolandInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoVargas, HE, Mayo Clin Scottsdale, Div Transplantat Med, 13400 E Shea Blvd,SCJRB 3-363, Scottsdale, AZ 85259 USA TI - Hepatitis C virus quasi-species dynamics predict progression of fibrosis after liver transplantation AB - Background. The dynamics of hepatitis C virus (HCV) quasi species in the E2 region may correlate with the course of infection after orthotopic liver transplantation (OLT). Methods. Thirty-four patients who underwent transplantation for HCV-related cirrhosis were studied. Serum and liver samples were available before OLT and at 1 week, 4 months, and 1 year after OLT. Patients were divided into group 1 (Knodell/Ishak fibrosis stage [FS] at 1 year, < 2) and group 2 (FS at 1 year, &GE;2). Complexity was estimated by the number of bands in a single-strand conformational polymorphism assay, whereas diversity was measured by Shannon entropy (SE) and median mobility shift (MMS) values derived from the heteroduplex mobility assay. Diversity dynamics were measured at transmission ( before OLT vs. 1 week after OLT) and after OLT ( 1 week after OLT vs. 1 year after OLT). Results. Complexity was higher in group 1 patients than in group 2 patients before OLT (P < .02) and at 1 week after OLT (P < .04). Diversity decreased in group 1 at transmission, as measured by either SE (P < .01) or MMS (P < .04). However, diversity increased in this group after OLT, as measured by SE (P < .03) or MMS (P < .02). FS at 1 year after OLT correlated with transmission changes, as measured by SE (P < .01) and MMS (r = 0.443, P < .04), and with post-OLT changes (for SE: r = -0.583, P < .01; for MMS: r = -0.536, P < .01). Conclusions. HCV complexity and diversity in the E2 region correlated with the severity of recurrence of HCV infection after OLT. Increased diversity of quasi species at transmission correlated with a higher FS at 1 year. However, increased diversity of quasi species in the post-OLT period correlated with a lower FS at 1 year. The dynamics of HCV quasi species in patients who undergo transplantation are predictive of outcome MH - USA MH - Mexico|Distrito Federal MH - Poland PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000221653500011 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; CHOLESTATIC HEPATITIS; EVOLUTION; INFECTION; SUBSTITUTIONS; REPLICATION; TRANSLATION; RECURRENCE; GENOTYPES; SEVERITY SO - Journal of Infectious Diseases 2004 ;189(11):2037-2046 10049 UI - 4934 AU - Arias HOR AU - Wood MK AU - Nieto CM AU - Lopez GR AU - de la Vega L AD - Inst Nacl Invest Forestales, Agricolas & Pecuarias SAGARPA, Chihuahua, MexicoNew Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003, USAINIFAP, SAGARPA, Chihuahua 31100, MexicoUniv Autonoma Chihuahua, Fac Zootecnia, Cuauhtemoc, Chihuahua, MexicoWood, MK, Inst Nacl Invest Forestales, Agricolas & Pecuarias SAGARPA, Campo Expt Madera,Ave Homero 3744, Chihuahua, Mexico TI - Above- and below-ground responses of Eragrostis and Bouteloua grass seedlings to the plant-growth-promoting bacterium Azospirillium brasilense AB - Two experiments were performed to determine the effects of inoculation with N-2 fixing bacterium Azospirillum brasilense on forage production and root growth in seedlings of Wilman lovegrass, weeping lovegrass, and sideoats grama. Two sources of inorganic nitrogen (N) were tested: Urea, CO(NH2)(2) (45%) and ammonium nitrate NH4NO3 (33.3%). Crude protein (CP), calcium (Ca) and phosphorous (P) concentrations were determined. In both experiments top dry matter (DM) production was significantly affected for grasses and inoculation but no differences were found for inorganic nitrogen applications. Maximum amount of top DM was obtained with the Wilman lovegrass with 5.70g, weeping lovegrass reached 2.70g, and sideoats grama only reached 1.58g. Inoculated treatments reached 3.37g while the no-inoculated treatments obtained 2.74g. A similar trend was also noted for root phytomass. CP, Ca and P concentrations for the first experiment did not show any trend; therefore, they were not determined for the second experiment. Inoculation of grasses with A. brasilense may be a feasible practice for seeding some rangeland where N deficiency is a problem. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Chihuahua MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000222718000002 L2 - nitrogen fixing bacteria;Azospirillium;inorganic nitrogen;root phytomass;above-ground production;GENUS AZOSPIRILLUM; SP-NOV; INOCULATION; WHEAT; RHIZOSPHERE; LIPOFERUM; MUTANT SO - Journal of Arid Environments 2004 ;59(1):19-26 10050 UI - 6329 AU - Arias JM AU - Gomez-Camacho J AU - Lemus R AD - Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, Seville 41080, SpainNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoArias, JM, Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, Apartado 1065, Seville 41080, Spain TI - An su(1,1) dynamical algebra for the Poschl-Teller potential AB - An su(1, 1) dynamical algebra to describe the continuum part of the spectrum for the modified Poschl-Teller potential is proposed. The space associated with this algebra is given in terms of a family of orthonormal functions {Phi(n)(sigma)} characterized by the parameter sigma. This set is constructed from polynomials which are orthogonal with respect to a weighting function corresponding to a Poschl-Teller ground state. An analysis of the associated algebra is investigated in detail. The functions are identified with Poschl-Teller-like functions associated with different potential depths. We prove that by choosing appropriately the parameter sigma it is possible to decouple the discrete states of a given parity from the continuum part of the spectrum. A discussion of the matrix elements of the dipole function operator is also included MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000188710600026 L2 - LOCAL MODE VIBRATIONS; QUANTUM-MECHANICS; REAL EIGENVALUES; VIBRON MODEL; SUPERSYMMETRY; OSCILLATOR; HAMILTONIANS; SCATTERING; OPERATORS; MOLECULES SO - Journal of Physics A-Mathematical and General 2004 ;37(3):877-893 10051 UI - 5965 AU - Arimura S AU - Shibai H AU - Teshima T AU - Nakagawa T AU - Narita M AU - Makiuti S AU - Doi Y AU - Verma RP AU - Ghosh SK AU - Rengarajan TN AU - Tanaka M AU - Okuda H AD - Nagoya Univ, Sch Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, JapanJAXA, Inst Space & Astronaut Sci, Tsukuba, Ibaraki 3058505, JapanJAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, JapanUniv Tokyo, Coll Arts & Sci, Meguro Ku, Tokyo 1538902, JapanTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoNEC Corp Ltd, Kawasaki, Kanagawa 2118666, JapanGunma Astron Observ, Gunma 3770702, JapanArimura, S, Nagoya Univ, Sch Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan TI - Wide-area mapping of 155 micron continuum emission from the Orion molecular cloud complex AB - We present the results of a wide-area mapping of the far-infrared continuum emission toward the Orion complex by using a Japanese balloon-borne telescope. The 155-mum continuum emission was detected over a re-ion of 1.5 deg(2) around the KL nebula with 3' resolution similar to that of the IRAS 100-mum map. Assuming a single-temperature model of the thermal equilibrium dust, maps of the temperature and the optical thickness were derived from the 155-mum intensity and the IRAS 100-mum intensity. The derived dust temperature is 5-15 K lower and the derived dust optical depth is 5-300 times larger than those derived from the IRAS 60 and 100-mum intensities due to the significant contribution of the statistically heated very small grains to the IRAS 60-mum intensity. The optical-thickness distribution shows a filamentary dust ridge that has a 1.degrees5 extent in the north-south direction and well resembles the Integral-Shaped Filament (ISF) molecular gas distribution. The gas-to-dust ratio derived from the CO molecular gas distribution along the ISF is in the range 30-200, which may be interpreted as being an effect of CO depletion due to the photodissociation and/or the freezing on dust grains MH - India MH - Japan MH - Mexico|Puebla PB - TOKYO: ASTRONOMICAL SOC JAPAN RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6264 UR - ISI:000220139700005 L2 - infrared : ISM;ISM : dust, extinction;ISM : HII regions;ISM : individual (Orion KL);COLD DUST; NEBULA; REGION; TELESCOPE; DISCOVERY; CARBON SO - Publications of the Astronomical Society of Japan 2004 ;56(1):51-60 10052 UI - 6758 AU - Arino J AU - Cooke KL AU - Van der Driessche P AU - Velasco-Hernandez J AD - Univ Victoria, Dept Math & Stat, Victoria, BC V8W 3P4, CanadaPomona Coll, Dept Math, Claremont, CA 91711, USAInst Mexicano Petr, Programa Matemat Aplicadas & Computac, San Bartolo Atepehuacan 07730, DF, MexicoArino, J, Univ Victoria, Dept Math & Stat, Victoria, BC V8W 3P4, Canada TI - An epidemiology model that includes a leaky vaccine with a general waning function AB - Vaccination that gives partial protection for both newborns and susceptibles is included in a transmission model for a disease that confers no immunity. A general form of the vaccine waning function is assumed, and the interplay of this together with the vaccine efficacy and vaccination rates is discussed. The integro-differential system describing the model is studied for a constant vaccine waning rate, in which case it reduces to an ODE system, and for a constant waning period, in which case it reduces to a system of delay differential equations. For some parameter values, the model is shown to exhibit a backward bifurcation, leading to the existence of subthreshold endemic equilibria. Numerical examples are presented that demonstrate the consequence of this bifurcation in terms of epidemic control. The model can alternatively be interpreted as one consisting of two social groups, with education playing the role of vaccination MH - Canada MH - Mexico|Distrito Federal MH - USA PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1531-3492 UR - ISI:000187071500008 L2 - epidemic model;vaccination;backward bifurcation;delay differential equation system;BACKWARD BIFURCATION; DISEASE TRANSMISSION; INFECTIONS; STABILITY; STATES; AIDS SO - Discrete and Continuous Dynamical Systems-Series B 2004 ;4(2):479-495 10053 UI - 6141 AU - Arisi E AU - Sanchez SAP AU - Leccabue F AU - Watts BE AU - Bocelli G AU - Calderon F AU - Calestani G AU - Righi L AD - CNR, Ist IMEM, I-43010 Parma, ItalyUniv Parma, Dipartimento Chim, I-43010 Parma, ItalyUASLP, Inst Fis, San Luis Potosi 78000, MexicoUniv La Habana, Fac Phys, IMRE, Havana, CubaArisi, E, CNR, Ist IMEM, Area Sci 47-A, I-43010 Parma, Italy TI - Preparation and characterization of AlVO4 compound AB - AlVO4 is a relatively new sensor material derived from V2O5/Al2O3 mixtures to selectively detect NO and NO2 gases. Previous studies carried out in order to determine its structural, absorptive and sensory properties indicate that the AlVO4 is not the only single phase. This work deals with the synthesis of the compound by the ceramic and the nitrate decomposition methods, and by the sol gel route. The Rietveld refinement of the compound was carried out in order to determine its crystal structure. Single phase of AlVO4 was successfully obtained via the nitrate decomposition and the sol gel methods. Thereafter, films prepared by the sol gel route were deposited on alumina and Si/SiO2/Pt substrates and characterized by SEM and X-ray diffraction. The electric characterization of the AlVO4 on alumina substrate film is also presented. (C) 2004 Kluwer Academic Publishers MH - Cuba MH - Italy MH - Mexico|San Luis Potosi PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000189240000021 L2 - GAS SENSORS SO - Journal of Materials Science 2004 ;39(6):2107-2111 10054 UI - 5833 AU - Arjona O AU - Medel R AU - Plumet J AU - Herrera R AU - Jimenez-Vazquez HA AU - Tamariz J AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Quim Organ, Mexico City 11340, DF, MexicoUniv Complutense, Fac Quim, Dept Quim Organ, E-28040 Madrid, SpainUniv Michoacana San Nicholas Hidalgo, Inst Invest Quimicobiol, Edif B1, Ciudad Univ, Morelia, Michoacan 58066, MexicoPlumet, J, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Quim Organ, Prol Carpio & Plan Ayala, Mexico City 11340, DF, Mexico TI - Diels-Alder reactions of masked o-benzoquinones: New experimental findings and a theoretical study of the inverse electron demand case AB - Diels-Alder reactions of the masked o-benzoquinone (MOB) 2 with vinylene carbonate (3), the bicyclic derivatives 4, 5, and 6, and the intramolecular version of the 2-hydroxymethylfuran-MOB Diels-Alder reaction are described. In addition, a theoretical study of the Diels-Alder reactions of MOBS with enol and thioenol ethers is presented MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000220506200017 L2 - TRICYCLIC GAMMA-LACTONES; STEREOSELECTIVE-SYNTHESIS; CIS-DECALINS; COPE REACTIONS; DETOUR METHOD; RING-SYSTEMS; 2-METHOXYPHENOLS; DERIVATIVES; DIENOPHILES; MONOKETALS SO - Journal of Organic Chemistry 2004 ;69(7):2348-2354 10055 UI - 4003 AU - Armendariz V AU - Herrera I AU - Peralta-Videa JR AU - Jose-Yacaman M AU - Troiani H AU - Santiago P AU - Gardea-Torresdey JL AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAUniv Texas, Environm Sci & Engn PhD Program, El Paso, TX 79968, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, CNM, Texas Mat Inst, Austin, TX 78712, USAUNAM, Inst Fis, Mexico City 20, DF, MexicoGardea-Torresdey, JL, Univ Texas, Dept Chem, El Paso, TX 79968, USA TI - Size controlled gold nanoparticle formation by Avena sativa biomass: use of plants in nanobiotechnology AB - Oat (Avena sativa) biomass was studied as an alternative to recover Au(III) ions from aqueous solutions and for its capacity to reduce Au( III) to Au(0) forming Au nanoparticles. To study the binding trend of Au(III) to oat and the possible formation of Au nanoparticles, the biomass and a solution of Au( III) were reacted for a period of 1 h at pH values ranging from 2 to 6. The results demonstrated that Au( III) ions were bound to oat biomass in a pH-dependent manner, with the highest adsorption (about 80%) at pH 3. HRTEM studies showed that oat biomass reacted with Au(III) ions formed Au nanoparticles of fcc tetrahedral, decahedral, hexagonal, icosahedral multitwinned, irregular, and rod shape. To our knowledge, this is the second report about the production of nanorods as a product of the reaction of a Au( III) solution with a biological material. These studies also showed that the pH of the reaction influenced the nanoparticle size. The smaller nanoparticles and the higher occurrence of these were observed at pH values of 3 and 4, whereas the larger nanoparticles were observed at pH 2 MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1388-0764 UR - ISI:000224856800005 L2 - gold;nanoparticles;oat biomass;pH;nanobiotechnology;COLLOIDAL GOLD; NANOTECHNOLOGY SO - Journal of Nanoparticle Research 2004 ;6(4):377-382 10056 UI - 4964 AU - Arnaud MC AU - Gazarian T AU - Rodriguez YP AU - Gazarian K AU - Sakanyan V AD - Univ Nantes, CNRS, FRE 2230, UMR 6204, F-44322 Nantes, FranceUniv Nacl Autonoma Mexico, Fac Med, Dept Salud Publ, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Mol & Biotechnol, Mexico City, DF, MexicoSakanyan, V, Univ Nantes, CNRS, FRE 2230, UMR 6204, 2 Rue Houssiniere, F-44322 Nantes, France TI - Array assessment of phage-displayed peptide mimics of Human Immunodeficiency Virus type 1 gp41 immunodominant epitope: Binding to antibodies of infected individuals AB - An array of phage-displayed mimetic peptides representing 18 sequences from the HIV-1 gp41 immunodominant epitope was fabricated on a nitrocellulose membrane. It used to compare the antibody-binding affinity of the peptide and to monitor the immune response of four patients prior to and after the initiation of Highly Active Anti-Retroviral Therapy in parallel assays with several probes using near-infrared fluorescence detection. The proposed multiplexed approach is highly sensitive, consumes less sample and can be used to analyze the immune repertoires of virus-infected individuals MH - France MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 1615-9853 UR - ISI:000222533500015 L2 - Gp41 epitope mimotopes;HIV-1;immune response;phage display;protein array;RESPONSES; PROTEIN; HIV; GLYCOPROTEIN; MICROARRAYS; LIBRARIES; SERA SO - Proteomics 2004 ;4(7):1959-1964 10057 UI - 5097 AU - Aroca F AD - UNAM, Inst Matemat, Cuernavaca 62251, Morelos, MexicoAroca, F, Univ Sao Paulo, Dept Matemat, Inst Ciencias Matemat & Comp, Caixa Postal 668, BR-13560970 Sao Carlos, SP, Brazil TI - Puiseux parametric equations of analytic sets AB - We prove the existence of local Puiseux-type parameterizations of complex analytic sets via Laurent series convergent on wedges. We describe the wedges in terms of the Newton polyhedron of a function vanishing on the discriminant locus of a projection. The existence of a local parameterization of quasi-ordinary singularities of complex analytic sets of any codimension will come as a consequence of our main result MH - Brazil MH - Mexico|Morelos PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000222122800028 L2 - parameterization;wedges;quasi-ordinary singularities;SINGULARITIES; THEOREM SO - Proceedings of the American Mathematical Society 2004 ;132(10):3035-3045 10058 UI - 6198 AU - Arriaga J AU - Knight JC AU - Russell PSJ AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Bath, Dept Phys, Optoelect Grp, Bath BA2 7AY, Avon, EnglandArriaga, J, Univ Autonoma Puebla, Inst Fis, Apartado Postal J-48, Puebla 72570, Mexico TI - Modeling the propagation of light in photonic crystal fibers AB - Using the plane wave expansion method, we have solved Maxwell's equations for the propagation of electromagnetic waves in photonic crystal fibers. Taking the cross section of the photonic crystal fiber as a big unit cell, and generating an artificial infinite two-dimensional periodic system, the plane wave expansion allows us to study the properties of the core in exactly the same way as defects in photonic crystals. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000189094600008 L2 - propagation of light;photonic crystal fiber;photonic band gap;OPTICAL-FIBERS; GAP; GUIDANCE; AIR; NM SO - Physica D-Nonlinear Phenomena 2004 ;189(1-2):100-106 10059 UI - 3267 AU - Arroyo G AU - Ochoa C AU - Silva J AU - Vidal G AD - CIIDET, Queretaro, Qro, Mexico. Tech Univ Valencia, DSIC, E-46022 Valencia, Spain TI - Towards CNC programming using Haskell AB - Recent advances in Computerized Numeric Control (CNC) have allowed the manufacturing of products with high quality standards. Since CNC programs consist of a series of assembler-like instructions, several high-level languages (e.g., AutoLISP, APL, OMAC) have been proposed to raise the programming abstraction level. Unfortunately, the lack of a clean semantics prevents the development of formal tools for the analysis and manipulation of programs. In this work, we propose the use of Haskell for CNC programming. The declarative nature of Haskell provides an excellent basis to develop program analysis and manipulation tools and, most importantly, to formally prove their correctness MH - Mexico|Queretaro MH - Spain T3 - ADVANCES IN ARTIFICIAL INTELLIGENCE - IBERAMIA 2004Lecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - ON REQUEST (04/14/08) U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlegarroyo@ciidet.edu.mx cochoa@dsic.upv.es jsilva@dsic.upv.es gvidal@dsic.upv.es0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBO40 AV - English IS - 0302-9743 UR - ISI:000226646200039 SO - 2004 ;():386-396 10060 UI - 6216 AU - Arroyo M AU - Bernes S AU - Ceron J AU - Rius J AU - Torrens H AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Puebla 72571, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrado, Mexico City 04510, DF, MexicoInst Ciencia Mat Barcelona, Bellaterra 08193, SpainArroyo, M, Benemerita Univ Autonoma Puebla, Inst Ciencias, Ctr Quim, Apdo Postal J-42, Puebla 72571, Mexico TI - Insertion reactions of [M(SR)(3)(PMe2Ph)(2)]withCS(2) (M= Ru, Os; R = C6F4H-4, C6F5. X-ray structures of [Ru(S2CSC6F4H-4)(2)(PMe2Ph)(2)], trans-thiolates [M(SR)(2)(S2CSR)(PMe2Ph)(2)] (M= Ru; R = C6F5 and M= Os; R = C6F4H-4), and trans-thiolate-phosphine [OS(SC6F5)(2)(S2CSC6F5)(PMe2Ph)(2)] AB - Reactions of [M(SR)(3)(PMe2Ph)(2)] (M = Ru, Os; R = C6F4H-4, C6F5) with CS2 in acetone afford [Ru(S2CSR)(2)(PMe2Ph)(2)] (R = C6F4H-4, 1; C6F5, 3) and trans-thiolates [Ru(SR)(2)(S2CSR)(PMe2Ph)(2)] (R = C6F4H-4, 2; C6F5, 4) or the isomers trans-thiolates [Os(SR)(2)(S2CSR)(PMe2Ph)(2)] (R = C6F4H-4, 5; C6F5, 7) and trans-thiolate-phosphine [Os(SR)(2)(S2CSR)(PMe2Ph)(2)] (R = C6F4H-4, 6; C6F5, 8) through processes involving CS2 insertion into M-SR bonds. The ruthenium(Ill) complexes [Ru(SR)(3)(PMe2Ph)(2)] react with CS2 to give the diamagnetic thiolate-thioxanthato ruthenium(II) and the paramagnetic ruthenium(III) complexes while osmium(III) complexes [Os(SR)(3)(PMe2Ph)(2)] react to give the paramagnetic thiolate-thioxanthato osmium(III) isomers. The single-crystal X-ray diffraction studies of 1, 4, 5, and 8 show distorted octahedral structures. P-31 {H-1} and F-19 NMR studies show that the solution structures of 1 and 3 are consistent with the solid-state structure of 1 MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000188972500022 L2 - F BOND ACTIVATION; CRYSTAL-STRUCTURE; CARBON-DIOXIDE; CS2 INSERTION; COMPLEXES; OSMIUM(III); CO2; DISULFIDE; 4-C6H4ME; CHME2 SO - Inorganic Chemistry 2004 ;43(3):986-992 10061 UI - 5297 AU - Arthur SJ AU - Kurtz SE AU - Franco J AU - Albarran MY AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, MexicoArthur, SJ, Univ Leeds, Dept Phys & Astron, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England TI - The effects of dust on compact and ultracompact HII regions AB - We calculate numerical models of dusty H II regions using the Cloudy photoionization code with a grain size distribution. Dust sublimation causes a depletion of grain sizes and types within the ionized region, with large graphite grains being able to exist closer to the star than smaller graphite grains or silicate grains. We investigate the time-dependent hydrodynamic expansion of dusty H II regions and find that the fraction of ionizing photons absorbed by dust decreases with time. Furthermore, dusty H II regions stall earlier and at smaller radii than their dust-free counterparts. Comparison is made between our models and observable parameters, such as the electron density. We find that the electron density in dusty ionized regions estimated from radio continuum observations is likely to be an overestimate, and we quantify the discrepancy. Finally, we calculate the infrared emission from dusty H II regions and their surrounding circumnebular dust shells using the DUSTY code. We find that the far-infrared emission depends strongly on the parameters assumed for the circumnebular dust shell MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000221881200024 L2 - circumstellar matter;dust, extinction;HII regions;infrared : ISM;ISM : kinematics and dynamics;stars : formation;H-II REGIONS; LYMAN CONTINUUM EXTINCTION; EARLY-TYPE STARS; DYNAMICAL EVOLUTION; ISO SPECTROSCOPY; RADIO-CONTINUUM; MASSIVE STARS; EMISSION; GRAINS; GALAXY SO - Astrophysical Journal 2004 ;608(1):282-296 10062 UI - 4096 AU - Arulmani U AU - MaassenVanDenBrink A AU - Villalon CM AU - Saxena PR AD - Univ Rotterdam, Med Ctr, Dept Pharmacol, Inst Cardiovasc Res, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Farmacobiol, Coapa 14330, DF, MexicoSaxena, PR, Univ Rotterdam, Med Ctr, Dept Pharmacol, Inst Cardiovasc Res, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Calcitonin gene-related peptide and its role in migraine pathophysiology AB - Migraine is a common neurological disorder that is associated with an increase in plasma calcitonin gene-related peptide (CGRP) levels. CGRP, a neuropeptide released from activated trigeminal sensory nerves, dilates intracranial blood vessels and transmits vascular nociception. Therefore, it is propounded that: (i) CGRP may have an important role in migraine pathophysiology, and (ii) inhibition of trigeminal CGRP release or CGRP-induced cranial vasodilatation may abort migraine. In this regard, triptans ameliorate migraine headache primarily by constricting the dilated cranial blood vessels and by inhibiting the trigeminal CGRP release. In order to explore the potential role of CGRP in migraine pathophysiology, the advent of a selective CGRP receptor antagonist was obligatory. The introduction of di-peptide CGRP receptor antagonists, namely BIBN4096BS (1-piperidinecarboxamide, N-[2-[[5-amino-l-[[4-(4-pyridinyl)-1-piperazinyl]carbonyl] pentyl] amino]-1-[(3,5-dibromo-4-hydroxyphenyl) methyl]-2-oxoethyl]-4-(1,4-dihydro-2-oxo-3(2H)-quinazolinyl)-, [R-(R*,S*)]-), is a breakthrough in CGRP receptor pharmacology and can be used as a tool to investigate the role of CGRP in migraine headaches. Preclinical investigations in established migraine models that are predictive of antimigraine activity have shown that BIBN4096BS is a potent CGRP receptor antagonist and that it has antimigraine potential. Indeed, a recently published clinical study has reported that BIBN409BS is effective in treating acute migraine attacks without significant side effects. The present review will discuss mainly the potential role of CGRP in the pathophysiology of migraine and the various treatment modalities that are currently available to target this neuropeptide. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 23 U4 - Pharmacology & Pharmacy U5 - J;Review AV - English IS - 0014-2999 UR - ISI:000224635400029 L2 - antimigraine drug;BIBN4096BS;CGRP;migraine;CGRP RECEPTOR ANTAGONIST; SK-N-MC; CORTICAL SPREADING DEPRESSION; ACTIVITY-MODIFYING PROTEIN-1; BOVINE CEREBRAL-ARTERIES; DORSAL-ROOT GANGLIA; SUBSTANCE-P; NITRIC-OXIDE; ADRENOMEDULLIN RECEPTORS; NEUROGENIC INFLAMMATION SO - European Journal of Pharmacology 2004 ;500(1-3):315-330 10063 UI - 4659 AU - Arulmani U AU - Heiligers JPC AU - Garrelds IM AU - Sanchez-Lopez A AU - Willems EW AU - Villalon CM AU - Saxena PR AD - Univ Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Farmacobiol, Mexico City 07738, DF, MexicoSaxena, PR, Univ Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Effects of sumatriptan on capsaicin-induced carotid haemodynamic changes and CGRP release in anaesthetized pigs AB - It is suggested that during a migraine attack capsaicin-sensitive trigeminal sensory nerves release calcitonin gene related peptide (CGRP), resulting in cranial vasodilatation and central nociception. Hence, inhibition of trigeminal CGRP release may prevent the above vasodilatation and, accordingly, abort migraine headache. Therefore, this study investigated the effects of sumatriptan (100 and 300 mug/kg, i.v.) on capsaicin-induced carotid haemodynamic changes and on CGRP release. Intracarotid (i.c.) infusions of capsaicin (10 mug/kg/min, i.c.) increased total carotid, arteriovenous anastomotic and capillary conductances as well as carotid pulsations, but decreased the difference between arterial and jugular venous oxygen saturations. Except for some attenuation of arteriovenous anastomotic changes, the capsaicin-induced responses were not affected by sumatriptan. Moreover, i.c. infusions of capsaicin (0.3, 1, 3 and 10 mug/kg/min, i.c.) dose-dependently increased the jugular venous plasma concentrations of CGRP, which also remained unaffected by sumatriptan. The above results support the contention that the therapeutic action of sumatriptan is mainly due to cranial vasoconstriction rather than trigeminal (CGRP release) inhibition MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0333-1024 UR - ISI:000223377900005 L2 - capsaicin;carotid haemodyna-mics;CGRP;migraine;sumatriptan;GENE-RELATED PEPTIDE; SUPERIOR SAGITTAL SINUS; ARTERIOVENOUS ANASTOMOSES; TRIGEMINAL GANGLION; ANTIMIGRAINE THERAPY; RECEPTOR ANTAGONIST; INDUCED RELAXATION; MOLECULAR-CLONING; BLOOD FLOWS; IN-VITRO SO - Cephalalgia 2004 ;24(9):717-727 10064 UI - 4955 AU - Arulmani U AU - Schuijt MP AU - Heiligers JRC AU - Willems EW AU - Villalon CM AU - Saxena PR AD - Erasmus Univ, Dept Pharmacol, Ctr Med, COEUR, NL-3000 DR Rotterdam, NetherlandsCINVESTAV, IPN, Mexico City 14330, DF, MexicoSaxena, PR, Erasmus Univ, Dept Pharmacol, Ctr Med, COEUR, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Effects of the calcitonin gene-related peptide (CGRP) receptor antagonist BIBN4096BS on alpha-CGRP-Induced regional haemodynamic changes in anaesthetised rats AB - Several studies suggest that a calcitonin gene-related peptide (CGRP) receptor antagonist may have antimigraine properties, most probably via the inhibition of CGRP-induced cranial vasodilatation. We recently showed that the novel selective CGRP receptor antagonist, BIBN4096BS (1-piperidinecarboxamide, -N-[2-[[5-amino-1-[[4-(4-pyridinyl)-1-piperazinyl] carbonyl] pentyl]amino]-1-[(3,5-dibromo-4-hydroxyphenyl] methyl]-2-oxoethyl]-4-(1,4-dihydro-2-oxo-3(2H)quinazolinyl)-, [[R-(R,(R*,S*)]), attenuated the CGRP-induced porcine carotid vasodilatation in a model predictive of antimigraine activity In order to evaluate the potential safety of BIBN4096BS in migraine therapy, this study was designed to investigate the effects of intravenous BIBN4096BS on alpha-CGRP-induced systemic and regional haemodynamic changes in anaesthetised rats, using radioactive microspheres. In vehicle-pretreated animals, consecutive intravenous infusions of alpha-CGRP (0.25, 0.5 and 1 mug kg(-1) min.(-1)) dose-dependently decreased mean arterial blood pressure with an accompanying increase in heart rate and systemic vascular conductance whereas cardiac output remained unchanged. alpha-CGRP also increased the vascular conductance to the heart, brain, gastrointestinal tract, adrenals, skeletal muscles and skin, whilst that to the kidneys, spleen, mesentery/pancreas and liver remained unaltered. The above systemic and regional haemodynamic responses to alpha-CGRP were clearly attenuated in BIBN4096BS (3 mg kg(-1) intravenously)-pretreated animals. These results indicate that exogenously administered alpha-CGRP dilates regional vascular beds via CGRP receptors on the basis of the antagonism produced by BIBN4096BS. Moreover, the fact that BIBN4096BS did not alter baseline haemodynamics suggests that endogenously produced CGRP does not play an important role in regulating the systemic and regional haemodynamics under resting conditions MH - Mexico|Distrito Federal MH - Netherlands PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 8 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 1742-7835 UR - ISI:000222734500006 L2 - BLOOD-FLOW; MIGRAINE; SYSTEM; RESPONSES; ARTERIES; PIG; PATHOPHYSIOLOGY; LOCALIZATION; BLOCKING; CORONARY SO - Basic & Clinical Pharmacology & Toxicology 2004 ;94(6):291-297 10065 UI - 4850 AU - Asbjornsen H AU - Ashton MS AU - Vogt DJ AU - Palacios S AD - Iowa State Univ Sci & Technol, Dept Nat Resource Ecol & Management, Ames, IA 50011, USAYale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511, USAUniv Washington, Coll Forest Resources, Seattle, WA 98195, USANatl Autonomous Univ Mexico, Dept Geol, Mexico City 04510, DF, MexicoAsbjornsen, H, Iowa State Univ Sci & Technol, Dept Nat Resource Ecol & Management, 253 Bessey Hall, Ames, IA 50011 USA TI - Effects of habitat fragmentation on the buffering capacity of edge environments in a seasonally dry tropical oak forest ecosystem in Oaxaca, Mexico AB - The composition, structure, and disturbance dynamics of the native oak forests in seasonally dry tropical highland regions throughout the world have been drastically altered due to human land use. Edge environments are a dominant feature in these highly fragmented landscapes, and may directly influence the capacity of the vegetation to ameliorate microclimate conditions and support the successful regeneration of disturbed habitat. In this study, microclimate variables (surface soil moisture, photosynthetically active radiation and ground, surface and air temperatures) were assessed across edge gradients occurring between forest remnants and openings of different sizes (<0.1 and >1 ha) in both a highly fragmented landscape and a relatively undisturbed adjacent landscape over a 2-year period. Surface soil moistures increased progressively from the open areas (10.8-40.1 g m(-3)) into the forest understory (16.8-54.7 g m(-3)). The steepness of the edge gradient was less pronounced in the highly fragmented landscape (23.02 g m(-3)) compared to the reference landscape (29.34 g m(-3)). These results suggest that microsite variability across edges was reduced in this landscape in response to fragmentation. Further, the occurrence of an extreme drought event during the second year diminished differences between the fragmented and reference landscapes, thereby leading to greater homogeneity of the microclimate across the edge environments. Structural differences in forest patches within the fragmented landscape were also found to interact synergistically with habitat fragmentation to influence patterns in microclimate across edge environments. The capacity of oak forests to ameliorate the availability and flux of surface soil moisture in seasonally dry tropical ecosystems through their effect on evaporative moisture loss, and the reduction of this buffering capacity in response to habitat fragmentation documented in this study, suggests that fragmentation has significantly altered the temporal and spatial heterogeneity of microclimate conditions in these landscapes. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000223004600006 L2 - habitat fragmentation;dry tropical highlands;edge effects;Mexico;drought;soil moisture;buffering capacity;oak forests;EASTERN UNITED-STATES; TO-INTERIOR GRADIENTS; SOIL-MOISTURE; VEGETATION RESPONSES; MANAGED LANDSCAPE; QUERCUS-PETRAEA; CANOPY GAPS; CLEAR-CUT; LAND-USE; MICROCLIMATE SO - Agriculture Ecosystems & Environment 2004 ;103(3):481-495 10066 UI - 4457 AU - Ascanio G AU - Foucault S AU - Tanguy PA AD - Natl Autonomous Univ Mexico, Ctr Appl Sci & Technol Dev, Mexico City, DF, MexicoEcole Polytech, Unit Res Ind Flow Proc, Montreal, PQ, CanadaTanguy, PA, POB 6079 Stn,Ctr Ville, Montreal, PQ H3C 3A7, Canada TI - Time-periodic mixing of shear-thinning fluids AB - Mixing times and energy consumption of inelastic shear-thinning fluids in stirred vessels were experimentally investigated using time-periodic conditions. The impeller rotated initially at a speed sufficient to allow the well-mixed region around the impeller to be formed and then the impeller was stopped and turned on periodically. Mixing times were evaluated by the colorimetry technique based on the fast acid-base reaction, which also allowed the presence of either dead or segregated regions in the vessel to be revealed. The effects of impeller type, its position and speed as well as the fluid power-law index were all considered in this work. Both the mixing times and the energy consumption can be drastically reduced when weakly shear-thinning fluids are mixed at low speed under intermittent conditions. Results obtained with the best operating conditions are compared to steady stirring, showing the potentialities and drawbacks of the proposed approach MH - Canada MH - Mexico|Distrito Federal PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0263-8762 UR - ISI:000223823800017 L2 - shear-thinning fluids;chaotic mixing;well-mixed regions;segregated regions;CHAOTIC FLOWS SO - Chemical Engineering Research & Design 2004 ;82(A9):1199-1203 10067 UI - 5946 AU - Ascanio G AU - Carreau PJ AU - De La Fuente EB AU - Tanguy PA AD - Ecole Polytech, Dept Chem Engn, CRASP, Montreal, PQ H3C 3A7, CanadaNatl Autonomous Univ Mexico, Fac Chem, Mexico City 04510, DF, MexicoTanguy, PA, Ecole Polytech Montreal, URPEI, Paprican Chair, POB 6079,Stn Ctr Ville, Montreal, PQ M3C 3A7, Canada TI - Forward deformable roll coating at high speed with Newtonian fluids\ AB - The flow of Newtonian fluids through the deformable nip of a high speed roll coater was experimentally studied. A digital video system was used for the observation of the formation, elongation and break-up of fluid filaments at the exit of the nip and to investigate how misting droplets are ejected to the surroundings. The pressure profile in the nip was obtained by a miniaturized piezoelectric transducer mounted on one of the coater rolls. Experimental results show that both film splitting and air entrainment into the nip can be responsible for misting occurrence when a low load is applied between the rolls. When a high load is applied, misting can be eliminated and a periodic flow is generated in the nip gap MH - Canada MH - Mexico|Distrito Federal PB - RUGBY: INST CHEMICAL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0263-8762 UR - ISI:000220303800010 L2 - high-speed forward roll coating;deformable gap;misting;nip pressure;hydrodynamics;Newtonian;FLOW SO - Chemical Engineering Research & Design 2004 ;82(A3):390-397 10068 UI - 5788 AU - Ascenio F AU - Gama NL AU - De Philippis R AU - Ho B AD - Biol Res Ctr, Marine Pathol Unit, La Paz 23000, Baja Calif Sur, MexicoNatl Univ Singapore, Dept Microbiol, Singapore 117597, SingaporeUniv Florence, Dipartimento Biotecnol Agrarie, Florence, ItalyAscenio, F, Biol Res Ctr, Marine Pathol Unit, La Paz 23000, Baja Calif Sur, Mexico TI - Effectiveness of Cyanothece spp. and cyanospira capsulata exocellular polysaccharides as antiadhesive agents for blocking attachment of Helicobacter pylori to human gastric cells AB - The effect of cyanobacterial polysaccharides (from Cyanothece spp. and Cyanospira capsulata) on the binding of Helicobacter pylori to gastric epithelial cells was evaluated. The antiadhesive action on Kato III and HeLa S3 human gastric cell lines was established MH - Italy MH - Mexico|Baja California Sur MH - Singapore PB - PRAGUE 4: FOLIA MICROBIOLOGICA RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0015-5632 UR - ISI:000220630700012 L2 - FUNCTIONAL FOODS; HEPARAN-SULFATE; UV EXPOSURE; BINDING; INFECTION; WATER; CYANOBACTERIA; INHIBITION; ADHESION; ALGAE SO - Folia Microbiologica 2004 ;49(1):64-70 10069 UI - 4234 AU - Aslan K AU - Luhrs CC AU - Perez-Luna VH AD - IIT, Dept Chem & Environm Engn, Chicago, IL 60616, USAUniv Guadalajara, Dept Quim, Guadalajara 44430, Jalisco, MexicoPerez-Luna, VH, IIT, Dept Chem & Environm Engn, 10 W 33rd St, Chicago, IL 60616 USA TI - Controlled and reversible aggregation of biotinylated gold nanoparticles with streptavidin AB - Biotinylated gold nanoparticles were prepared by using a two-step surface modification procedure. First, a carboxyl-terminated alkanethiol was chemisorbed onto the surface of gold nanoparticles in the presence of a stabilizing agent. Subsequently, the carboxyl groups were reacted with (+)-biotinyl-3,6,9,-trioxaundecanediamine and 2-(2-aminoethoxy)ethanol. This procedure resulted in stable, ligand-modified gold nanoparticles. Upon interaction with streptavidin, the biotinylated gold nanoparticles aggregated by means of specific biomolecular recognition. Their aggregation was studied by optical absorption spectroscopy. Controlled aggregation of biotinylated gold nanoparticles resulted in a shift in the surface plasmon resonance peak and broadening of the absorption spectrum of the nanoparticles. The spectral changes were used to assess the extent of aggregation. Aggregation was found to be dependent on the concentrations of streptavidin, biotinylated,,old nanoparticles, and the surface mole fraction of biotin groups on the nanoparticles. Maximum aggregation was observed when 24 nM streptavidin and 0.80 nM biotinylated gold nanoparticles were used. Reversal of nanoparticle aggregation was accomplished by the addition of soluble biotin to the streptavidin-nanoparticle aggregates. Kinetic analysis of the absorbance data showed that streptavidin-induced aggregation of biotinylated G-Limited Colloidal Aggregation (RLCA) model.,,old nanoparticles could be interpreted in terms of a Reaction This indicates that optical absorption spectroscopy can provide a quantitative measurement of the aggregation process MH - USA MH - Mexico|Jalisco PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000224213500029 L2 - RANDOM SEQUENTIAL ADSORPTION; OPTICAL-ABSORPTION; COLLOIDAL GOLD; COLORIMETRIC DETECTION; METAL PARTICLES; SURFACES; POLYNUCLEOTIDES; ALKANETHIOLS; SPECTROSCOPY; NANOCRYSTALS SO - Journal of Physical Chemistry B 2004 ;108(40):15631-15639 10070 UI - 6291 AU - Asseng S AU - Jamieson PD AU - Kimball B AU - Pinter P AU - Sayre K AU - Bowden JW AU - Howden SM AD - CSIRO, Wembley, WA 6913, AustraliaNew Zealand Crop & Food Res Ltd, Christchurch, New ZealandUSDA ARS, US Water Conservat Lab, Phoenix, AZ 85040, USACIMMYT, Mexico City 06600, DF, MexicoAgr Western Australia, Ctr Cropping Syst, Northam, WA 6401, AustraliaCSIRO, Canberra, ACT 2601, AustraliaAsseng, S, CSIRO, Private Bag 5, Wembley, WA 6913, Australia TI - Simulated wheat growth affected by rising temperature, increased water deficit and elevated atmospheric CO2 AB - The cropping systems simulation model APSIM-Nwheat was tested against detailed field measurements representing possible growing conditions under future climate change scenarios. Increasing average temperatures by 1.7 degreesC observed over several seasons at Obregon, Mexico reduced the time to flowering by 11 days and resulted in a decline of total biomass and grain yield. These effects were reproduced by the model, except when the observed total biomass inexplicably rose again in the fourth and fifth year, despite higher temperature and a much shorter growing time. In a water stress experiment, the effects of different timing and duration of water deficit on crop growth and yield were reproduced with the model for a rain-shelter experiment at Lincoln, New Zealand where observed grain yields were reduced from 10 to 4 t ha(-1) due to increased water deficit. In experiments from Western Australia, reduced growth and yields due to extreme terminal water deficit were also reproduced with the model where measured yields fall below 0.5 t ha(-1). In the Maricopa Free Air Carbon-Dioxide Enrichment (FACE) experiment in Arizona, USA, the largest yield increase occurred with elevated CO2 in the dry and high N treatments, whereas little or no response was observed in the wet and low N supply treatments, as simulated with the model. Combining elevated CO2 with increased temperature in a sensitivity analysis, two levels of water supply and a range of N applications indicated a positive effect of elevated CO2 on yield as long as N was not limiting growth. Increased temperature and reduced water supply reduced yields and the yield response to N supply under ambient and elevated CO2. Grain protein concentrations were reduced under elevated CO2, but the difference was minor with ample N fertiliser. Evapotranspiration was reduced under elevated CO2. Higher temperatures increased evapotranspiration with low N input, but reduced it with ample N fertiliser, resulting in a reduction and an increase, respectively, in drainage below the root zone. In the Mediterranean environment of Western Australia the impact of elevated CO2 and increased temperature on grain yield was in average positive, but varied with seasonal rainfall distribution. Based on the range of model testing experiments and the sensitivity analysis, APSIM-Nwheat was found suitable for studies on directional impacts of future climate change on wheat production. Due to some large discrepancies between simulated and observed data, field experiments representing only a limited range of possible climate change scenarios and the large possible range of factorial interactions not tested, simulated quantitative effects with the model should be interpreted cautiously. (C) 2003 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - New Zealand MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000188883500001 L2 - simulation;modelling;wheat crop;yield;climate change;CO2;CARBON-DIOXIDE ENRICHMENT; SPRING WHEAT; USE EFFICIENCY; MEDITERRANEAN CLIMATE; CROPPING SYSTEMS; GRAIN QUALITY; APSIM-NWHEAT; CERES-WHEAT; NITROGEN; MODEL SO - Field Crops Research 2004 ;85(2-3):85-102 10071 UI - 3032 AU - Assis MA AU - Padros MR AU - Rosete M AU - Duran S AU - Sotomayor C AU - Vindrola O AU - Cancela L AD - Natl Univ Cordoba, Cordoba, ArgentinaAuton Univ Puebla, Puebla, Mexico TI - Amphetamine triggers long-lasting effects in CNS and IS: is the proenkephalin system a possible common mediator? MH - Argentina MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0165-5728 UR - ISI:000224003200468 SO - Journal of Neuroimmunology 2004 ;154(1-2):139-139 10072 UI - 5968 AU - Aswath CR AU - Mo SY AU - Kim SH AU - Kim DH AD - Natl Autonomous Univ Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoIndian Inst Hort Res, Bangalore 560089, Karnataka, IndiaKonkuk Univ, Dept Hort, Genet Engn Lab, Seoul, South KoreaKim, SH, Natl Autonomous Univ Mexico, Inst Ecol, Dept Ecol Evolut, Ciudad Univ,AP Postal 70-275, Mexico City 04510, DF, Mexico TI - IbMADS4 regulates the vegetative shoot development in transgenic chrysanthemum (Dendrathema grandiflora (Ramat.) Kitamura) AB - 14 A new MADS-box gene, IbMADS4, had been cloned in Ipomoea batatas (L.) Lam. that is expressed in all vegetative tissues of the plant, mainly in the root tissues, but not in flower organs. Sequence similarity besides the spatial and temporal expression patterns allows defining a novel MADS-box subfamily comprising STMADS16 and the other MADS-box genes expressed specifically in vegetative tissues. Expression of the IbMADS4 sense cDNA under the control of the 35S cauliflower mosaic virus promoter modifies dramatic changes in the phenotype, such as axillary shoot formation in chrysanthemum. Leaf and axillary shoot number of sense transgenic plants showed a three- and four-fold increase in shoot regeneration compared with the wild-type, respectively. The results presented here are aimed at understanding the molecular mechanisms involved in shoot morphogenesis. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - India MH - Mexico|Distrito Federal MH - South Korea PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0168-9452 UR - ISI:000220163600003 L2 - IbMADS4;shoot development;chrysanthemum;transformation;MADS-BOX GENE; ARABIDOPSIS-THALIANA; PLANT-REGENERATION; MORIFOLIUM RAMAT; EXPRESSION; TISSUES; TRANSFORMATION; RESISTANCE; TZVELEV; CLONING SO - Plant Science 2004 ;166(4):847-854 10073 UI - 5985 AU - Atakishiyev MN AU - Groza VA AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoNatl Aviat Univ, Kiev, UkraineAtakishiyev, MN, UNAM, Inst Matemat, Cuernavaca 62210, Morelos, Mexico TI - The quantum algebra U-q(su(2)) and q-Krawtchouk families of polynomials AB - The aim of this paper is to study quantum and affine q-Krawtchouk polynomials by means of operators of irreducible representations of the quantum algebra U-q (su(2)). We diagonalize a certain operator I in such a representation and show that elements of the transition matrix from the initial (canonical) basis to the basis consisting of eigenfunctions of the operator I are expressed in terms of quantum q-Krawtchouk polynomials. Then we find an explicit form of the operator q(J3) in the basis of the eigenfunctions of I, in which it has the form of a Jacobi matrix. Normalizing this basis and using the operator q(J3), we thus derive the orthogonality relations for quantum and affine q-Krawtchouk polynomials. We show that affine q-Krawtchouk polynomials are dual to quantum q-Krawtchouk polynomials. A biorthogonal system of functions (with respect to the scalar product in the representation space) is also derived MH - Mexico|Morelos MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000220141200008 L2 - FINITE 2-DIMENSIONAL OSCILLATOR; SPHERICAL-FUNCTIONS; REPRESENTATIONS; SU(Q)(2); MODEL/; BASES SO - Journal of Physics A-Mathematical and General 2004 ;37(7):2625-2635 10074 UI - 4638 AU - Atakishiyev NM AU - Klimyk AU AU - Wolf KB AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoBogolyubov Inst Theoret Phys, UA-03143 Kiev, UkraineAtakishiyev, NM, UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, Mexico TI - Finite q-oscillator AB - The finite q-oscillator is a model that obeys the dynamics of the harmonic oscillator, with the operators of position, momentum and Hamiltonian being functions of elements of the q-algebra su(q)(2). The spectrum of position in this discrete system, in a fixed representation j, consists of 2j + 1 'sensor' - points x(s) = (1)/(2)[2s](q), s is an element of {-j, -j + 1,..., j}, and similarly for the momentum observable. The spectrum of energies is finite and equally spaced, so the system supports coherent states. The wavefunctions involve dual q-Kravchuk polynomials, which are solutions to a finite-difference Schrodinger equation. Time evolution (times a phase) defines the fractional Fourier-q-Kravchuk transform. In the classical limit as q --> 1 we recover the finite oscillator Lie algebra, the N = 2j --> infinity limit returns the Macfarlane-Biedenharn q-oscillator and both limits contract the generators to the standard quantum-mechanical harmonic oscillator MH - Mexico|Morelos MH - Ukraine PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000223360900005 L2 - FRACTIONAL FOURIER-TRANSFORMS; 2-DIMENSIONAL OSCILLATOR; HARMONIC-OSCILLATOR; REPRESENTATIONS; OPERATORS; SU(Q)(2); ALGEBRAS; SUQ(2); MODEL; BASES SO - Journal of Physics A-Mathematical and General 2004 ;37(21):5569-5587 10075 UI - 5258 AU - Atakishiyev NM AU - Klimyk AU AD - UNAM, Inst Matemat, Cuernavaca 62210, Morelos, MexicoBogolyubov Inst Theoret Phys, UA-03143 Kiev, UkraineAtakishiyev, NM, UNAM, Inst Matemat, Apartado Postal 273-3, Cuernavaca 62210, Morelos, Mexico TI - On q-orthogonal polynomials, dual to little and big q-Jacobi polynomials AB - We derive discrete orthogonality relations for polynomials, dual to little and big q-Jacobi polynomials. This derivation essentially requires use of bases, consisting of eigenvectors of certain self-adjoint operators, which are representable by a Jacobi matrix. Recurrence relations for these polynomials are also given. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Morelos MH - Ukraine PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000221914600022 L2 - duality;little q-Jacobi polynomials;big q-Jacobi polynomials;discrete orthogonality relations;Jacobi matrix SO - Journal of Mathematical Analysis and Applications 2004 ;294(1):246-257 10076 UI - 6055 AU - Atzori M AU - Hernandez JF AU - Pineda JC AD - BRNI, Lab Cellular & Synapt Physiol, Rockville, MD 20850, USABUAP, Inst Fisiol, Puebla 72570, MexicoUADY, Dpt Neurociencias, Merida 47000, Yucatan, MexicoAtzori, M, BRNI, Lab Cellular & Synapt Physiol, Rockville, MD 20850, USA TI - Interlaminar differences of spike activation threshold in the auditory cortex of the rat AB - The neural circuits of the auditory cortex are a substrate for the dual purpose of representing and storing the auditory signal on one hand, and sending its relevant features to other cortical and subcortical areas on the other hand. The ability to process and transform the signal crucially depends on achievement of the neuronal spike threshold following spatiotemporal summation of the synaptic signals. We used patch-clamp recording in a thin slice preparation to compare neuronal responses to current injection of layer II/III and layer V neurons. We found that while the two classes of neurons do not differ in passive neuronal properties, layer II/III neurons possess a lower firing threshold relative to layer V neurons (-44.8 +/- 2.4 mV vs. -34.3 +/- 4.0 mV). We speculate that a lower spiking threshold in layer II/III neurons might favor local intracolumnar activation for representation and storage of the auditory information whereas a more positive spiking threshold for layer V neurons may prevent unnecessary cortical spread of a scarcely processed signal. (C) 2003 Published by Elsevier B.V MH - Mexico|Puebla MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences;Otorhinolaryngology U5 - J;Article AV - English IS - 0378-5955 UR - ISI:000220123700011 L2 - cortical circuitry;signal processing;synaptic summation;layer II/III;layer V;AI;patch-clamp;PYRAMIDAL NEURONS; LAYER-III; AI; NEOCORTEX; COLUMNAR SO - Hearing Research 2004 ;189(1-2):101-106 10077 UI - 6376 AU - Auger JC AU - Barrera RG AU - Stout B AD - Ctr Invest Polimeros, Grp COMEX, Mexico City 11560, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoFac Sci & Tech St Jerome, Inst Fresnel, UMR 6133, Ctr St Jerome, F-13397 Marseille, FranceAuger, JC, Ctr Invest Polimeros, Grp COMEX, Blvd Manuel Avila Camacho 138,Lomas Chapultepec, Mexico City 11560, DF, Mexico TI - Optical properties of an eccentrically located pigment within an air bubble AB - We study the orientational average of the scattering efficiencies of scatterers composed by an eccentrically located spherical TiO2 pigment within an air bubble embedded in resin. This study is carried out within a general T-matrix formalism and takes into account the contributions of the asymmetry parameter to the photon transport mean-free path. We perform a detailed comparison of the scattering efficiency of this system with the one corresponding to the same pigment particle embedded directly in resin. We showed that placing a TiO2 pigment eccentrically into an air bubble embedded in resin could not increase the scattering efficiency of the pigment in comparison to a system consisting of the same fractional volume of pigment particles and the same fractional volume of air bubbles acting independently within the same resin. (C) 2003 Published by Elsevier B.V MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Materials Science, Coatings & Films U5 - J;Review AV - English IS - 0300-9440 UR - ISI:000188413800009 L2 - optical properties;pigment;eccentrically;LIGHT-SCATTERING; INCLUSION SO - Progress in Organic Coatings 2004 ;49(1):74-83 10078 UI - 3636 AU - Avendano C AU - Reyes JA AU - Del Castillo-Mussot M AU - Vazquez GJ AU - Spector H AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoIIT, Dept Phys, Chicago, IL 60616, USAAvendano, C, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - 1D stark effect with an electric field confined in a finite region AB - We study the electronic properties of a strictly ID quantum system, formed by two particles interacting through a Coulomb attractive potential, under a uniform electric field E applied over a spatially confined region of thickness 2a which satisfies -a < x < a. From the corresponding Schrodinger equation we derive asymptotic expressions to represent the eigenfunctions in the regions where E does not exist (\x\ greater than or equal to a), and then we find numerically the solution in the region -a < x < a by using the shooting method. We use the WKB method to find the critical or ionization field above which there are no bound states MH - Mexico|Distrito Federal MH - USA PB - TAIPEI: PHYSICAL SOC REPUBLIC CHINA RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0577-9073 UR - ISI:000225781900010 SO - Chinese Journal of Physics 2004 ;42(6):751-763 10079 UI - 5020 AU - Avila R AU - Masciadri E AU - Vernin J AU - Sanchez LJ AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoMax Planck Inst Astron, D-69117 Heidelberg, GermanyUniv Nice, Lab Univ Astrophys Nice, UMR 6525, F-06108 Nice, FranceUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoMasciadri, E, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Apartado Postal 3-72, Morelia 58089, Michoacan, Mexico TI - Generalized SCIDAR measurements at San Pedro Martir. I. Turbulence profile statistics AB - We present the results of monitoring optical-turbulence profiles at San Pedro Martir, Mexico, during 11 nights in 1997 March and April, and 16 nights in 2000 May. The data were collected using the generalized scintillation detection and ranging (SCIDAR) technique from Nice University at the 1.5 and 2.1 m telescopes. A total of 6414 turbulence profiles were measured and statistically analyzed. The principal results are as follows: the seeing produced by the turbulence in the first 1.2 km at the 1.5 m and 2.1 m telescopes, not including turbulence inside the domes, have median values of 0."63 +/- 0."01 and 0."44 +/- 0."02, respectively. The dome seeing at those telescopes have median values of 0."64 +/- 0."01 and 0."31 +/- 0."02. The median values of the seeing produced above 1.2 km and in the whole atmosphere are 0."39 +/- 0."01 and 0."71 +/- 0."01. The isoplanatic angle for full-correction adaptive optics has a median value of 1."87 +/- 0."04. The decorrelation time (defined as the time lag for which the temporal correlation drops to 50%) of the turbulence strength at altitudes below and above 16 km above sea level is approximately equal to 2 and 0.5 hr, respectively. The isoplanatic-angle decorrelation time is estimated to be equal to 2 hr. The turbulence above similar to 8 km remained notably calm during nine consecutive nights, which is encouraging for adaptive optics observations at the site. The results obtained here places San Pedro Martir among the best suited sites for installing next-generation optical telescopes MH - France MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6280 UR - ISI:000222387500010 L2 - ATMOSPHERIC-TURBULENCE; OPTICAL TURBULENCE; ADAPTIVE OPTICS; LAYERS SO - Publications of the Astronomical Society of the Pacific 2004 ;116(821):682-692 10080 UI - 2951 AU - Avoli M AU - varez-Leefmans F AU - Miles R AU - Woodin N AD - McGill Univ, Montreal, PQ, CanadaUniv Roma La Sapienza, Dept Physiol, Rome, ItalyIRCCS, Dept Physiol, Pozzilli, ItalyInst Politecn Nacl, Dept Physiol, Mexico City, DF, MexicoUniv Paris 07, CHU Pitie Salpetriere, EMI 0224, Paris, FranceUniv Toronto, Dept Zool, Toronto, ON, Canada TI - Plasticity of chloride transport and GABA signaling MH - Canada MH - France MH - Italy MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000224420100003 SO - Epilepsia 2004 ;45():1-1 10081 UI - 3787 AU - Avonce N AU - Leyman B AU - Mascorro-Gallardo JO AU - Van Dijck P AU - Thevelein JM AU - Iturriaga G AD - Univ Autonoma Estado Morelos, Ctr Invest Biotecnol, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62210, Morelos, MexicoKatholieke Univ Leuven, Lab Mol Celbiol, B-3001 Heverlee, BelgiumVlaams Interuniv Inst Biotechnol, Flanders, BelgiumIturriaga, G, Univ Autonoma Estado Morelos, Ctr Invest Biotecnol, Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - The Arabidopsis trehalose-6-P synthase AtTPS1 gene is a regulator of glucose, abscisic acid, and stress signaling AB - In Arabidopsis (Arabidopsis thaliana), trehalose is present at almost undetectable levels, excluding its role as an osmoprotectant. Here, we report that overexpression of AtTPS1 in Arabidopsis using the 35S promoter led to a small increase in trehalose and trehalose-6-P levels. In spite of this, transgenic plants displayed a dehydration tolerance phenotype without any visible morphological alterations, except for delayed flowering. Moreover, seedlings overexpressing AtTPS1 exhibited glucose (Glc)- and abscisic acid (ABA)-insensitive phenotypes. Transgenic seedlings germinated on Glc were visibly larger with green well-expanded cotyledonary leaves and fully developed roots, in contrast with wild-type seedlings showing growth retardation and absence of photosynthetic tissue. An ABA dose-response experiment revealed a higher germination rate for transgenic plants overexpressing AtTPS1 showing insensitive germination kinetics at 2.5 mum ABA. Interestingly, germination in the presence of Glc did not trigger an increase in ABA content in plants overexpressing AtTPS1. Expression analysis by quantitative reverse transcription-PCR in transgenic plants showed up-regulation of the ABI4 and CAB1 genes. In the presence of Glc, CAB1 expression remained high, whereas ABI4, HXK1, and ApL3 levels were down-regulated in the AtTPS1-overexpressing lines. Analysis of AtTPS1 expression in HXK1-antisense or HXK1-sense transgenic lines suggests the possible involvement of AtTPS1 in the hexokinase-dependent Glc-signaling pathway. These data strongly suggest that AtTPS1 has a pivotal role in the regulation of Glc and ABA signaling during vegetative development MH - Belgium MH - Mexico|Morelos PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 40 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000225315600025 L2 - SELAGINELLA-LEPIDOPHYLLA; INSENSITIVE MUTANTS; PLANTS; SUGAR; GROWTH; YEAST; TOLERANCE; CARBOHYDRATE; ACCUMULATION; HEXOKINASE SO - Plant Physiology 2004 ;136(3):3649-3659 10082 UI - 3728 AU - Ayala A AU - Contreras JG AU - Magnin J AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCtr Invest & Estudios Avanzados, Dept Fis Aplicada, Unidad Merida, Yucatan 97310, MexicoCtr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilAyala, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Mass of the p(0) meson in ultra-relativistic heavy-ion collisions AB - We study the behavior of the rho vector mass in the context of the almost baryon-free environment of an ultra-relativistic heavy-ion collision. We show that rho scattering within the hadronic phase of the collision leads to a temperature dependent, decrease of its intrinsic mass at rest, compared to the value in vacuum. The main contributions arise from s-channel scattering with pions through the formation of a(1) resonances as well as with nucleons through the formation of even parity, spin 3/2 [N(1720)] and 5/2 [Delta(1905)] nucleon resonances. We show that it is possible to achieve a shift in the intrinsic rho(0) mass of order similar to -40 MeV, when including the contributions of all the relevant mesons and baryons that take part in the scattering, for temperatures between chemical and kinetic freeze-out. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000225419600010 L2 - DIELECTRON PRODUCTION; NUCLEAR-MATTER; RHO-MESON; RESONANCES; DECAYS; RESTORATION; DILEPTONS SO - Physics Letters B 2004 ;603(3-4):165-172 10083 UI - 4312 AU - Ayala G AU - Chihu L AU - Perales G AU - Fierros-Zarate G AU - Hansen LM AU - Solnick JV AU - Sanchez J AD - Inst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Cuernavaca 62508, Morelos, MexicoUniv Calif Davis, Dept Internal Med, Ctr Comparat Med, Davis, CA, USAUniv Calif Davis, Dept Med Microbiol, Ctr Comparat Med, Davis, CA, USAUniv Calif Davis, Dept Immunol, Ctr Comparat Med, Davis, CA, USAUniv Autonoma Estado Morelos, Fac Med, Cuernavaca, Morelos, MexicoAyala, G, Inst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Av Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Quantitation of H-pylori cytotoxin mRNA by real-time RT-PCR shows a wide expression range that does not correlate with promoter sequences AB - Up to 28-fold differences in vacA expression in Helicobacter pylori strains grown in vitro were demonstrated by real time quantitative RT-PCR. These large differences in expression were unrelated to putative - 35 and - 10 motifs or to other untranslated sequences upstream of the ATG start site. The lack of correlation between promoter sequences and the vacA expression levels suggest the potential existence of a bacterial strain-specific factor, as earlier proposed by others on the basis of reporter gene fusions. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Microbiology U5 - J;Article AV - English IS - 0882-4010 UR - ISI:000224084600008 L2 - RT-PCR;mRNA quantitation;promoter differences;multi-modal gene regulation;Mexican Helicobacter pylori;MUTATIONAL ANALYSIS; VACA GENE; TRANSCRIPTION; ASSOCIATION; INFECTION SO - Microbial Pathogenesis 2004 ;37(3):163-167 10084 UI - 5693 AU - Aydin H AU - Melhem R AU - Mosse D AU - Mejia-Alvarez P AD - George Mason Univ, Dept Comp Sci, Fairfax, VA 22030, USAUniv Pittsburgh, Dept Comp Sci, Pittsburgh, PA 15260, USAIPN, CINVESTAV, Secc Computac, Mexico City 07300, DF, MexicoAydin, H, George Mason Univ, Dept Comp Sci, Fairfax, VA 22030, USA TI - Power-aware scheduling for periodic real-time tasks AB - In this paper, we address power-aware scheduling of periodic tasks to reduce CPU energy consumption in hard real-time systems through dynamic voltage scaling. Our intertask voltage scheduling solution includes three components: 1) a static (off line) solution to compute the optimal speed, assuming worst-case workload for each arrival, 2) an online speed reduction mechanism to reclaim energy by adapting to the actual workload, and 3) an online, adaptive and speculative speed adjustment mechanism to anticipate early completions of future executions by using the average-case workload information. All these solutions still guarantee that all deadlines are met. Our simulation results show that our reclaiming algorithm alone outperforms other recently proposed intertask voltage scheduling schemes. Our speculative techniques are shown to provide additional gains, approaching the theoretical lower-bound by a margin of 10 percent MH - Mexico|Distrito Federal MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 19 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9340 UR - ISI:000220900000006 L2 - real-time systems;power-aware computing;low-power systems;dynamic voltage scaling;periodic task scheduling;REWARD SO - Ieee Transactions on Computers 2004 ;53(5):584-600 10085 UI - 5160 AU - az-Anzures J AU - Cordero-Davila A AU - Gonzalez-Garcia J AU - Martinez-Bravo O AU - Robledo-Sanchez C AU - Khrenov BA AU - Garipov GK AD - FCFM BUAP, Puebla, MexicoMoscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, Moscow 119992, RussiaMartinez-Bravo, O, FCFM BUAP, Av San Claudio & Rio Verde S-N, Puebla, Mexico TI - Low-frequency Fresnel mirrors for fluorescence detectors AB - In this work we present several designs of a Fresnel mirror with small number of rings (low frequency) to be used in fluorescence detectors aimed for study of ultra high energy cosmic rays. Being segmented the Fresnel mirror has an advantage of simple development from a compact package to a "plane" large area mirror-concentrator. This advantage is important for detectors in space and detectors at remote mountain sites. In this work, we investigated four possible ways of generating a focusing surface. In the first (main) design, the mirror consists of sections belonging to several parabolic surfaces. In this case the best focusing of a source on optical axis is achieved-the Fresnel mirror operates as parabolic mirror. This design is the best for a space "telescope", observing a source from large distances. Close to this design are mirror options with sections of a common parabolic surface and with sections of several spherical surfaces. The simplest for construction is the mirror with sections of a common spherical surface. In this design, focusing of a source on optical axis is much poorer than in previous options, but the mirror may be used in the experiments needed a wide field of view (FOV) with rough angular resolution. An advantage of this design is simplicity of the mirror construction which is shown in the mirror prototype construction and its testing. Results of the focal spot measurements are presented. This simple design of the Fresnel mirror is planned for use in the Pico de Orizaba mountain hybrid array where the wide field of view is important. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0927-6505 UR - ISI:000222339200005 SO - Astroparticle Physics 2004 ;21(4):407-413 10086 UI - 6421 AU - az-Aparicio E AU - Hernandez L AU - Suarez-Guemes F AD - CENID Microbiol, Inst Nacl Invest Agr Forestales & Pecuarias, Cuajimalpa, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Microbiol & Immunol, Coyoacan, MexicoDiaz-Aparicio, E, CNRS Marseille Luminy, INSERM, Ctr Immunol, Case 906, F-13288 Marseille 9, France TI - Protection against brucellosis in goats, five years after vaccination with reduced-dose Brucella melitensis Rev 1 vaccine AB - The protection conferred by the reduced-dose Rev I Brucella melitensis vaccine in goats that had been immunized 5 years previously was evaluated. Sixteen goats vaccinated 5 years before with Rev I (1 x 10(5) cfu) and 5 non-vaccinated goats were challenged with B. melitensis 16M (4 x 10(5) cfu) using the conjunctival route. After giving birth or aborting, the goats were sacrificed and tissue samples were taken for bacteriological study The challenge strain was recovered in 12% of the animals from the vaccinated group, and in 80% of the control group. It is concluded, therefore that the use of reduced-dose Rev 1 protects goats vaccinated in endemic areas for at least 5 years after immunization MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0049-4747 UR - ISI:000188079900002 L2 - Brucella melitensis;brucellosis;goats;Mexico;Rev 1;DELETION MUTANT; ADULT SHEEP; IMMUNITY; RESPONSES; INFECTION; STRAIN SO - Tropical Animal Health and Production 2004 ;36(2):117-121 10087 UI - 4270 AU - az-Castaneda V AU - Harris LH AD - CICESE, Dept Ecol, Ensenada 22860, Baja California, MexicoNat Hist Museum Los Angeles Cty Res & Collect, Los Angeles, CA 90007, USADiaz-Castaneda, V, CICESE, Dept Ecol, Km 107 Carret,Apdo Postal 2732, Ensenada 22860, Baja California, Mexico TI - Biodiversity and structure of the polychaete fauna from soft bottoms of Bahia Todos Santos, Baja California, Mexico AB - This paper describes diversity patterns of the polychaete fauna in Bahia Todos Santos (Pacific Ocean, Baja California, Mexico). Thirty-nine stations were sampled in October 1994. Measurements of depth, temperature, salinity, dissolved oxygen, organic content and sediment particle size were made. Polychaetes constituted 64% of all invertebrate macrofauna, with 13,757 specimens in 44 families representing 203 species. The best represented families were Spionidae, Capitellidae, Paraonidae, Cirratulidae, Maldanidae, Ampharetidae and Nephtyidae. Bahia Todos Santos presented high species richness (species/station); values varied between 6 (near the harbor) and 67 species (next to Estero Punta Banda). Higher species richness values (48 species to 67/station) were located in the southern section of the bay. Abundances (individuals/station) were generally high (120-1434) except for some coastal stations. Nearly one-third of the stations presented H' values higher than 4.00. Diversity (H') values ranged from 2.06 to 4.80; higher diversity values were found in the southern section of the bay. The stress-predictability modeling characterized approximately 70% of stations as presenting favorable and stable conditions. Pearson and Bray-Curtis coefficients separated stations in relation to their sediment particle size, depth and location in the bay. Principal component analysis determined that organic matter content, percentage of silt-clay, and water depth accounted for 95% of the total variance for all environmental factors measured. Correspondence analysis distinguished three groups of species: Group A species with an extensive distribution throughout the bay and relatively high abundances, Group B species abundant in the shallow areas, especially near the harbor, and Group C species present in the area of the submarine canyon. Non-metric multidimensional scaling analysis separated five groups of stations, depending on depth, grain size and location in the bay. Our results show that Bahia Todos Santos is a favorable environment for polychaete development, their distribution being strongly related to sediment characteristics. The dominant trophic group corresponds to deposit-feeders (91 species). (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700023 L2 - CONTINENTAL-SHELF; MARINE-SEDIMENTS; ORGANIC-MATTER; COMMUNITIES; PATTERNS; ASSEMBLAGES; DIVERSITY; SLOPE SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):827-847 10088 UI - 5134 AU - az-Castanon S AU - Faloh-Gandarilla JC AU - Leccabue F AU - Albanese G AD - Univ La Habana, Fac Fis, Magnetism Lab, IMRE, Bangkok 10400, ThailandIPICYT, Camino Presa San Jose, Mat Avanzados, San Luis Potosi 78216, SLP, MexicoCNR, IMEM, I-43010 Fontanini Parma, ItalyUniv Parma, Dipartimento Fis, INFM, I-43100 Parma, ItalyDiaz-Castanon, S, Univ La Habana, Fac Fis, Magnetism Lab, IMRE, San Lazaro & L, Bangkok 10400, Thailand TI - The optimum synthesis of high coercivity Pb-M hexaferrite powders using modifications to the traditional ceramic route AB - PbFe12O19 hexaferrite powders with high coercivities were obtained using modifications to the traditional ceramic route. Mossbauer and X-ray diffraction measurements indicates that the M-type hexagonal phase coexist with the alpha-Fe2O3 phase at the temperature range of 800 < T < 900degreesC and the homogeneous state is reached at 900degreesC. The optimum values of saturation magnetization and coercive field at this temperature were 62.00 emu/g and 4.0 kOe, respectively. At T > 900degreesC, the magnetic properties are drastically affected as a consequence of the volatility of PbO. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|San Luis Potosi MH - Thailand PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236800247 L2 - hexaferrites;Pb-M;coercivity;PULSED-LASER DEPOSITION; SAPPHIRE SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():2221-2223 10089 UI - 3472 AU - az-Castelazo C AU - Rico-Gray V AU - Oliveira PS AU - Cuautle M AD - Inst Ecol, Dept Ecol Func, Xalapa 91070, Veracruz, MexicoUniv Estadual Campinas, Dept Zool, BR-13083970 Campinas, SP, BrazilDiaz-Castelazo, C, Inst Ecol, Dept Ecol Func, AC Apdo 63, Xalapa 91070, Veracruz, Mexico TI - Extrafloral nectary-mediated ant-plant interactions in the coastal vegetation of Veracruz, Mexico: Richness, occurrence, seasonality, and ant foraging patterns AB - We studied the extrafloral nectary-mediated ant-plant interactions in the coastal vegetation of Veracruz, Mexico. We surveyed the richness and abundance of interactions, their correlations in both groups, the proportion of associated species and groups, and their temporal and spatial variation. Forty-three plant species (25 families) had extrafloral nectaries, which were more abundant during the wet season. Thirty-one ant species in 18 genera were found in 208 associations with extrafloral nectaries. Sixty-six percent of the nectary-bearing plant species were visited by ants. Eighty-four of the recorded ant species visited nectaries. The proportion of associated species was always higher than that of non-associated species. Ants forage on nectaries day and night, with sympatric species having contrasting foraging schedules. Abundance of nectary-bearing plants differed among seasons, while ant density and richness differed seasonally in specific vegetation types. Abundance of extrafloral nectaries was positively correlated with ant species richness during the rainy season. Seasonal patterns suggest higher nectar availability on vegetative structures during the rainy season and on reproductive structures during the dry season. The high proportion of extrafloral nectary-bearing plants found (14.82%) compared to other surveyed habitats (5-15%) suggests that extrafloral nectary-mediated plant protection by ants is a common feature in coastal communities of Veracruz MH - Brazil MH - Mexico|Veracruz PB - ST FOY: UNIVERSITE LAVAL RP - NOT IN FILE U3 - TC 7 U4 - Ecology U5 - J;Article AV - English IS - 1195-6860 UR - ISI:000226278100015 L2 - ant foraging patterns;ant-plant associations;coastal dune vegetation;dry tropical forest;extrafloral nectaries;seasonality;DRY TROPICAL LOWLANDS; SEED-EATING ANTS; COMMUNITY ORGANIZATION; HERBIVORE DETERRENCE; VISITING ANTS; MIMOSOIDEAE; PROTECTION; SAPLINGS; FITNESS; FOREST SO - Ecoscience 2004 ;11(4):472-481 10090 UI - 5335 AU - az-Cintra S AU - Yong A AU - Aguilar A AU - Bi XN AU - Lynch G AU - Ribak CE AD - Univ Calif Irvine, Coll Med, Dept Anat & Neurobiol, Irvine, CA 92697, USAUniv Mexico, Inst Neurobiol, Dept Dev Neurobiol & Neurophysiol, Juriquilla 76230, Queretaro, MexicoUniv Calif Irvine, Coll Med, Dept Psychiat & Human Behav, Irvine, CA 92697, USARibak, CE, Univ Calif Irvine, Coll Med, Dept Anat & Neurobiol, Irvine, CA 92697 USA TI - Ultrastructural analysis of hippocampal pyramidal neurons from apolipoprotein E-deficient mice treated with a cathepsin inhibitor AB - Cultured hippocampal slices prepared from apolipoprotein E (apoE)-deficient mice were exposed to an inhibitor of cathepsins B and L and then processed for an ultrastructural analysis of neuronal features for pyramidal cell bodies. Electron microscopy showed that the nuclei of pyramidal cells from treated hippocampal slices were more eccentrically located than those from untreated slices. In addition, increased numbers of vesicles were associated with the Golgi complex while microtubules were less frequent in the proximal dendrites. Consistent with previous studies in rats, treated apoE-deficient slices had increased numbers of lysosomes and multivesicular bodies. Finally, there were reductions in the number of synapses around the cell body, a finding similar to that found in the brains from Alzheimer's disease patients. These results provide ultrastructural data indicating that partial lysosomal dysfunction in apoE-deficient brains rapidly induces characteristic features of the aged human brain MH - USA MH - Mexico|Queretaro PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology;Neurosciences U5 - J;Article AV - English IS - 0300-4864 UR - ISI:000221745300003 L2 - ALZHEIMERS-DISEASE; NEUROFIBRILLARY TANGLES; AMYLOID DEPOSITS; CORTEX; BRAIN; MEGANEURITES; SUPPRESSION; LIPOFUSCIN; SYNAPSES; PROTEIN SO - Journal of Neurocytology 2004 ;33(1):37-48 10091 UI - 5124 AU - az-Ortiz A AU - Drautz R AU - Fahnle M AU - Dosch H AD - Inst Potosino Invest Cientifica & Tecnol, Adv Mat Dept, San Luis Potosi 78231, SLP, MexicoMax Planck Inst Met Res, D-70569 Stuttgart, GermanyDiaz-Ortiz, A, Inst Potosino Invest Cientifica & Tecnol, Adv Mat Dept, Apartado Postal Postal 3-74, San Luis Potosi 78231, SLP, Mexico TI - First-principles study of the interplay between magnetism and phase equilibria in Fe-Co alloys AB - The effect of magnetism on the ground state structures has been investigated by means of first-principles, density-functional calculations. In addition to the experimentally observed CsCl-type ground-state structure for FeCo stoichiometric alloys, our spin-polarized calculations predict several new ordered structures for iron-rich alloys. In particular, our results show that Fe3Co alloys are energetically stable for a number of ordered structures. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700013 L2 - iron alloys;first-principles calculations;magnetism;TRANSITION SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():780-782 10092 UI - 5676 AU - az-Ortiz A AU - Drautz R AU - Fahnle M AU - Dosch H AD - Inst Potosino Invest Cient & Tecnol, Adv Mat Dept, San Luis Potosi 78231, SLP, MexicoMax Planck Inst Met Res, D-70569 Stuttgart, GermanyDiaz-Ortiz, A, Inst Potosino Invest Cient & Tecnol, Adv Mat Dept, A C Apartado Postal 3-74 Tangamanga, San Luis Potosi 78231, SLP, Mexico TI - First-principles modeling of magnetism and phase equilibria in binary alloys AB - The magnetic and thermodynamic properties of iron-cobalt alloys have been investigated by means of first-principles density-functional calculations. A cluster expansion (CE) bridged the quantum and the statistical mechanics, providing a set of magnetically implicit effective cluster interactions (ECIs). Our results show that magnetism is crucial to the ordering tendencies in iron-cobalt: A non-spin-polarized calculation predicts Fe-Co as a phase separating system. This is also true in the case of atomic defects for the B2 (CsCl) phase of FeCo, where magnetism stabilizes the system against a spontaneous formation of antistructure atoms. As a by-product, our analysis helps to elucidate the origin of the controversy on the existence of a low-temperature Fe3Co ordered phase. (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|San Luis Potosi PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500007 L2 - magnetic properties of iron alloys;first-principles calculations;cluster expansion;TRANSITION-METAL ALLOYS; FE-CO ALLOYS; ORDER-DISORDER TRANSFORMATIONS; IRON-COBALT ALLOYS; BAND THEORY; 2ND-NEIGHBOR INTERACTIONS; COMPOSITION DEPENDENCE; ELECTRONIC-STRUCTURE; ISING-MODEL; DIAGRAM SO - Journal of Alloys and Compounds 2004 ;369(1-2):27-32 10093 UI - 6345 AU - az-Reval MI AU - Ventura-Martinez R AU - ciga-Campos M AU - Terron JA AU - Cabre F AU - Lopez-Munoz FJ AD - Univ Colima, Ctr Univ Invest Biomed, Colima 28045, Col, MexicoIPN, CINVESTAV, Dept Farmacol, Lab Dolor & Analgesia 7, Mexico City 14330, DF, MexicoIPN, CINVESTAV, Secc Externa Farmacol, Mexico City 07738, DF, MexicoMenarini Res, Barcelona, SpainDiaz-Reval, MI, Univ Colima, Ctr Univ Invest Biomed, Av 25 de Julio No 965,Col Villa San Sebastian, Colima 28045, Col, Mexico TI - Evidence for a central mechanism of action of S-(+)-ketoprofen AB - It has been observed that some non-steroidal anti-inflammatory drugs (NSAIDs) may act through several mechanisms, in addition to central inhibition of prostaglandin synthesis. These other mechanisms include the L-arginine-nitric oxide (L-arginine-NO) pathway, as well as endogenous opiate and serotonergic mechanisms. Some of these mechanisms can explain the efficacy of NSAIDs in chronic pain conditions such as rheumatoid arthritis. The present study was designed to elucidate the involvement of the above pathways/mechanisms in the antinociceptive effect of S-(+)-ketoprofen at supraspinal and spinal levels. S-(+)-ketoprofen induced dose-dependent antinociception in the pain-induced functional impairment model in the rat. The antinociceptive effect of S-(+)-ketoprofen was not altered by i.t. or intracerebroventricula (i.c.v.) pre-treatment with L-arginine (29.6 mug/site) and L-nitro-arginine-monomethylester (L-NAME) (21.1 mug/site) and neither was the effect of S-(+)-ketoprofen modified by the opiate antagonist, naloxone (1 mg/kg, s.c.). In marked contrast, both i.c.v. administration of the 5-hydroxytryptamine (5-HT)(1)/5-HT2/5-HT7 receptor antagonist, methiothepin (1.5 mug/site), and i.t. administration of the 5-HT3/5-HT4 receptor antagonist, tropisetron (0.9 mug/site), significantly inhibited the S-(+)-ketoprofen-induced antinociceptive effect. These data suggest that the antinociceptive response to S-(+)-ketoprofen involves serotoninergic mechanisms via both supraspinal 5-HT1/5-HT2/5-HT7 receptors and 5-HT3 receptors located at spinal level. A role of the L-arginine-NO and opiate systems in S-(+)-ketoprofen-induced antinociception in the pain-induced functional impairment model in the rat model seems unlikely. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Colima MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000188610600018 L2 - S-(+)-ketoprofen;antinociception;tropisetron;methiothepin;5-HT receptor antagonist;NALOXONE-REVERSIBLE ANTINOCICEPTION; SEROTONIN RECEPTOR SUBTYPES; ACETYLSALICYLIC-ACID; NITRIC-OXIDE; DEXKETOPROFEN TROMETAMOL; ANALGESIC ACTIVITY; SPINAL SEROTONIN; RAT-BRAIN; IN-VIVO; KETOPROFEN SO - European Journal of Pharmacology 2004 ;483(2-3):241-248 10094 UI - 6290 AU - az-Rojas EI AU - Pacheco-Aguilar R AU - Lizardi J AU - rguelles-Monal W AU - Valdez MA AU - Rinaudo M AU - Goycoolea FM AD - Ctr Invest Alimentac & Desarrollo AC, Biopolymer Lab, Hermosillo 83000, Sonora, MexicoCtr Invest Alimentac & Desarrollo AC, Unidad Guaymas, Guaymas 85480, Sonora, MexicoUniv Sonora, Dept Fis, Hermosillo 83000, Sonora, MexicoUniv Grenoble 1, CNRS, Ctr Rech Macromol Vegetales, F-38041 Grenoble 9, FranceGoycoolea, FM, Ctr Invest Alimentac & Desarrollo AC, Biopolymer Lab, POB 1735, Hermosillo 83000, Sonora, Mexico TI - Linseed pectin: gelling properties and performance as an encapsulation matrix for shark liver oil AB - Fully de-esterified Na-pectate with excellent gelling properties was isolated from linseed (Linum usitatissimum) using an alkaline extraction procedure aided with a sequestering agent. The gelling behavior of this material was studied as a function of amount of Ca2+ added and temperature by dynamic oscillatory rheology. Calcium cross-linking adjusted at varying stoichiometric ratios, (R = 2[Ca2+]/[COO-]), resulted in unequivocal gel network formation with mechanical spectra characteristic of permanent gel structure. Crude shark liver oil (SLO) was encapsulated into a composite matrix comprising linseed Na-pectate, alginate and chitosan. To this end, SLO was loaded into a linseed pectin-alginate solution at 2% (w/v), and gel beads were formed by dropwise addition into a CaCl2 bath and further coated by chitosan. Three different formulations were evaluated by varying the ratio of pectin to alginate (in % of the total equivalent concentration), while keeping constant the total polymer concentration at similar to 4% (w/w). As the proportion of linseed pectin in the formulae increased, the gel beads lost mechanical strength, sphericity and swelled more rapidly in water by a transport mechanism controlled only by diffusion of the solvent. Loading efficiency was greater in the capsules in which pectin contributed to 28% of the negatively charged polymer species (P28), which retained 73% of SLO, while capsules of pure alginate (PO) and those with a higher amount of pectin (P71) retained 65 and 67% of SLO, respectively. The observed differences between the three types of capsules were a direct consequence of the strength of linseed pectin gels, weaker than those of alginate. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Sonora PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000188883300012 L2 - pectin;shark liver oil;alginate;TRANSFORM INFRARED-SPECTROSCOPY; IONIC-STRENGTH; ORAL DELIVERY; CELL-WALLS; CHITOSAN; SUBSTANCES; BEADS; CHAIN; MICROCAPSULES; EXTRACTION SO - Food Hydrocolloids 2004 ;18(2):293-304 10095 UI - 5887 AU - az-Sanchez A AU - Ramirez-Angulo J AU - Lopez-Martin A AU - Sanchez-Sinencio E AD - Natl Inst Astrophys Opt & Elect, Dept Elect, Puebla 72840, MexicoNew Mexico State Univ, Klipsch Sch Elect & Comp Engn, Las Cruces, NM 88003, USAPubl Univ Navarra, Dept Elect & Elect Engn, E-31006 Pamplona, SpainTexas A&M Univ, Dept Elect Engn, College Stn, TX 77843, USADiaz-Sanchez, A, Natl Inst Astrophys Opt & Elect, Dept Elect, Puebla 72840, Mexico TI - A fully parallel CMOS analog median filter AB - A fully integrated CMOS implementation of a continuous-time analog median filter is presented. The median filter uses two compact analog circuits as building blocks to implement the variable delay and median detection. Median detectors are based on current saturating transconductance comparators, while the time delay is implemented using first-order all-pass filters. Both circuits allow modular expansion for the implementation of large median filter array processors. Based on these blocks, a new fast technique for parallel image processing is presented. It is shown that an image of 91 x 80 pixels can be processed in less than 8 mus using an array of median filter cells. Experimental results of a test chip prototype in 2-mum CMOS MOSIS technology are presented MH - Mexico|Puebla MH - Spain MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1057-7130 UR - ISI:000220386600003 L2 - analog delay cells;analog median filter;CMOS analog circuits;parallel image processing;transconductance comparators;HIGH-SPEED; IMPLEMENTATION SO - Ieee Transactions on Circuits and Systems Ii-Express Briefs 2004 ;51(3):116-123 10096 UI - 4471 AU - Azziz R AU - Farah LA AU - Moran C AU - Knochenhauer ES AU - Potter HD AU - Boots LR AD - Univ Alabama, Dept Obstet & Gynecol, Birmingham, AL 35294, USAUniv Alabama, Dept Med, Birmingham, AL 35294, USAMexican Inst Social Secur, Hlth Res Council, Mexico City, DF, MexicoAzziz, R, Cedars Sinai Med Ctr, Dept Obstet & Gynecol, 8635 W 3rd St,Suite 160 W, Los Angeles, CA 90048 USA TI - Early adrenarche in normal prepubertal girls: A prospective longitudinal study AB - Objective: To study basal and ACTH stimulated levels of dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulfate (DHEAS), androstenedione (A4), and cortisol (F) in healthy girls during prepuberty. Patients: Six prepubertal girls, ages 3.7-10.9 years. Study Design and Measurements: The six girls underwent a physical examination and an acute ACTH stimulation test on a yearly basis. Serum DHEA, DHEAS, A4, and F at 0 min (Steroid(0)) and 60 min (Steroid(60)) after 0.25 mg ACTH(1-24) i.v., and the net increment (DeltaSteroid(60-0)) were calculated. Results: DHEAS(0), DHEAS(60), DHEA(0), DHEA(60) and A4(0) were positively correlated to chronological age. DHEAS(0) and DHEAS(60) levels rose gradually beginning at 6.1-7.0 years of chronological age, and were found to be significantly different at 9.1-10.0 years and 10.1-11.0 years of age, compared to the median values obtained at less than or equal to6.0 years of age. There was a tendency for DHEA(0), DHEA(60), and A4(0) to increase beginning at 9.1-10.0 years of age. Net increment values of all hormones did not change throughout the study. Conclusion: An increase in the circulating level of DHEAS appears to be the first event observed during adrenarche, prior to clinical evidence of the process MH - USA MH - Mexico|Distrito Federal PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism;Pediatrics U5 - J;Article AV - English IS - 0334-018X UR - ISI:000223775800010 L2 - adrenal;adrenarche;androgens;dehydroepiandrosterone sulfate;puberty;ADRENOCORTICOTROPIN STIMULATION; PUBERTAL DEVELOPMENT; EUMENORRHEIC WOMEN; CORTISOL; AGE; SUPPRESSION; ANDROGENS; STEROIDS; CHILDREN; WEIGHT SO - Journal of Pediatric Endocrinology & Metabolism 2004 ;17(9):1231-1237 10097 UI - 6281 AU - Azziz R AU - Sanchez LA AU - Knochenhauer ES AU - Moran C AU - Lazenby J AU - Stephens KC AU - Taylor K AU - Boots LR AD - Univ Alabama, Dept Obstet & Gynecol, Birmingham, AL 35233, USAUniv Alabama, Dept Med, Birmingham, AL 35233, USACaracas Fertil Ctr, Caracas 1050, Federal Dist, VenezuelaMexican Inst Social Secur, Hlth Res Council, Mexico City, DF, MexicoAzziz, R, Cedars Sinai Med Ctr, Dept Obstet & Gynecol, 8635 W 3rd St,Suite 160 W, Los Angeles, CA 90048 USA TI - Androgen excess in women: Experience with over 1000 consecutive patients AB - The objective of the present study was to estimate the prevalence of the different pathological conditions causing clinically evident androgen excess and to document the degree of long-term success of suppressive and/or antiandrogen hormonal therapy in a large consecutive population of patients. All patients presenting for evaluation of symptoms potentially related to androgen excess between October 1987 and June 2002 were evaluated, and the data were maintained prospectively in a computerized database. For the assessment of therapeutic response, a retrospective review of the medical chart was performed, after the exclusion of those patients seeking fertility therapy only, or with inadequate follow-up or poor compliance. A total of 1281 consecutive patients were seen during the study period. Excluded from analysis were 408 patients in whom we were unable to evaluate hormonal status, determine ovulatory status, or find any evidence of androgen excess. In the remaining population of 873 patients, the unbiased prevalence of androgen-secreting neoplasms was 0.2%, 21-hydroxylase-deficient classic adrenal hyperplasia (CAH) was 0.6%, 21-hydroxylase-deficient nonclassic adrenal hyperplasia (NCAH) was 1.6%, hyperandrogenic insulin-resistant acanthosis nigricans (HAIRAN) syndrome was 3.1%, idiopathic hirsutism was 4.7%, and polycystic ovary syndrome (PCOS) was 82.0%. Fifty-nine (6.75%) patients had elevated androgen levels and hirsutism but normal ovulation. A total of 257 patients were included in the assessment of the response to hormonal therapy. The mean duration of follow-up was 33.5 months (range, 6-155). Hirsutism improved in 86%, menstrual dysfunction in 80%, acne in 81%, and hair loss in 33% of patients. The major side effects noted were irregular vaginal bleeding (16.1%), nausea (13.0%), and headaches (12.6%); only 36.6% of patients never complained of side effects. In this large study of consecutive patients presenting with clinically evident androgen excess, specific identifiable disorders (NCAH, CAH, HAIRAN syndrome, and androgen-secreting neoplasms) were observed in approximately 7% of subjects, whereas functional androgen excess, principally PCOS, was observed in the remainder. Hirsutism, menstrual dysfunction, or acne, but not alopecia, improved in the majority of patients treated with a combination suppressive therapy; although more than 60% experienced side effects MH - USA MH - Mexico|Distrito Federal MH - Venezuela PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 69 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000188763900002 L2 - POLYCYSTIC-OVARY-SYNDROME; PLACEBO-CONTROLLED TRIAL; RANDOMIZED CONTROLLED-TRIAL; 20 MU-G; INSULIN-RESISTANCE; ETHINYL ESTRADIOL; IDIOPATHIC HIRSUTISM; THYROID-DISORDERS; ACNE-VULGARIS; CYPROTERONE ACETATE SO - Journal of Clinical Endocrinology and Metabolism 2004 ;89(2):453-462 10098 UI - 6054 AU - Baas P AU - Blokhina N AU - Fujii T AU - Gasson P AU - Grosser D AU - Heinz I AU - Ilic J AU - Jiang XM AU - Miller R AU - Newsom LA AU - Noshiro S AU - Richter HG AU - Suzuki M AU - Terrazas T AU - Wheeler E AU - Wiedenhoeft A AD - Natl Herberium Nederland, Univ Leiden Branch, Leiden, NetherlandsRussian Acad Sci, Inst Biol & Pedol, Far E Branch, Vladivostok 690022, RussiaForestry & Forest Prod Res Inst, Ibaraki, JapanRoyal Bot Gardens, Jodrell Lab, Richmond, EnglandUniv Munich, Inst Holzforsch, D-80539 Munich, GermanyCSIRO Forestry & Forest Prod, S Clayton, AustraliaChinese Acad Forestry, CRIWI, Beijing, Peoples R ChinaUS Forest Serv, USDA, Forest Prod Lab, Madison, WI, USAPenn State Univ, Dept Anthropol, University Pk, PA 16802, USAUniv Hamburg, Inst Holzbiol, Hamburg, GermanyTohoku Univ, Grad Sch Sci, Bot Gardens, Sendai, Miyagi 980, JapanColegio Postgrad, Programa Bot, Montecillo, MexicoN Carolina State Univ, Dept Wood & Paper Sci, Raleigh, NC 27695, USABaas, P, Natl Herberium Nederland, Univ Leiden Branch, Leiden, Netherlands TI - IAWA list of microscopic features for softwood identification - Preface MH - Australia MH - United Kingdom MH - Germany MH - Japan MH - Mexico|Estado De Mexico MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - LEIDEN: INT ASSOC WOOD ANATOMISTS RP - NOT IN FILE U3 - TC 19 U4 - Forestry U5 - J;Article AV - English IS - 0928-1541 UR - ISI:000220062600001 L2 - WOOD ANATOMY; WART STRUCTURE; PIT MEMBRANES; RESIN CANALS; TRACHEIDS; PINE; VESTURES; CELLS SO - Iawa Journal 2004 ;25(1):1-+ 10099 UI - 3711 AU - Bachev R AU - Marziani P AU - Sulentic JW AU - Zamanov R AU - Calvani M AU - Dultzin-Hacyan D AD - Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAInst Astron, Sofia 1784, BulgariaOsserv Astron Padova, INAF, I-35122 Padua, ItalyLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, EnglandUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoBachev, R, Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USA TI - Average ultraviolet quasar spectra in the context of eigenvector 1: A Baldwin effect governed by the Eddington ratio? AB - We present composite UV spectra for low-redshift type 1 active galactic nuclei binned to exploit the information content of the eigenvector 1 (E1) parameter space. Composite spectra show high enough S/N and spectral resolution to permit a decomposition of the C IV lambda1549 line profile: one of the strongest high-ionization lines (HILs), and fundamental in defining E1 space. The simplest C IV lambda1549 decomposition into narrow-line region (NLR), broad-line region (BLR), and very broad line region (VBLR) components suggests that different components have an analog in Hbeta with two major exceptions. VBLR emission is seen only in population B [FWHM(Hbeta(BC))>4000 km s(-1)] sources. A blueshifted/asymmetric BLR component is seen only in population A [FWHM(Hbeta(BC))less than or equal to4000 km s(-1)] HILs such as C IV lambda1549. The blueshifted component is thought to arise in a high-ionization wind or outflow. Our analysis suggests that such a wind can only be produced in population A (almost all radio-quiet, RQ) sources, where the accretion rate is relatively high. We propose a model to account for several differences between low- and high-ionization line profiles. Part of the broad-line emission is attributed to a self-gravitating/fragmented region in an accretion disk. An inner, optically thick, geometrically thin region of the flow may give rise to a wind/outflow and produce the blueshifted HIL spectrum in population A sources. The fragmented region may produce all or most of the broad-line emission in population B, which contains RQ and the majority of radio-loud (RL) quasars. Comparison between broad UV lines in RL and RQ sources in a single, well-populated E1 parameter space bin (B1) shows few significant differences. Clear evidence is found for a significant NLR C IV component in most RL sources. The BLR/VBLR similarity in bin B1 provides circumstantial evidence in favor of black hole (BH) spin, rather than BH mass or accretion rate, as a key trigger in determining whether an object will be RL or RQ. We find a 10-fold decrease in EW C IV lambda1549 with Eddington ratio (decreasing from approximate to1 to similar to0.01), while N V lambda1240 shows no change. These trends suggest a luminosity-independent "Baldwin effect'' in which the physical driver may be the Eddington ratio MH - Bulgaria MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225766700011 L2 - methods : statistical;quasars : emission lines;quasars : general;ACTIVE GALACTIC NUCLEI; LINE SEYFERT-1 GALAXIES; DIGITAL SKY SURVEY; BLACK-HOLE MASS; BROAD EMISSION-LINES; LOW-IONIZATION LINES; RADIO-LOUD QUASARS; EARLY DATA RELEASE; PHYSICAL DRIVERS; HOST GALAXIES SO - Astrophysical Journal 2004 ;617(1):171-183 10100 UI - 4723 AU - Bacilio M AU - Rodriguez H AU - Moreno M AU - Hernandez JP AU - Bashan Y AD - Ctr Biol Res NW, Environm Microbiol Grp, La Paz 23000, BCS, MexicoCuban Res Inst Sugarcane By Prod, Havana, CubaBashan, Y, Ctr Biol Res NW, Environm Microbiol Grp, POB 128, La Paz 23000, BCS, Mexico TI - Mitigation of salt stress in wheat seedlings by a gfp-tagged Azospirillum lipoferum AB - Root colonization and mitigation of NaCl stress on wheat seedlings were studied by inoculating seeds with Azospirillum lipoferum JA4::ngfp15 tagged with the green fluorescent protein gene (gfp). Colonization of wheat roots under 80 and 160 mM NaCl stress was similar to root colonization with this bacterial species under non-saline conditions, that is, single cells and small aggregates were mainly located in the root hair zone. These salt concentrations had significant inhibitory effects on development of seedlings, but not on growth in culture of gfp-A. lipoferum JA4::ngfp15. Reduced plant growth (height and dry weight of leaves and roots) under continuous irrigation with 160 mM NaCl was ameliorated by bacterial inoculation with gfp-A. lipoferum JA4::ngfp15. Inoculation of plants subjected to continuous irrigation with 80 mM NaCl or to a single application of either NaCl concentration (80 or 160 mM NaCl) did not mitigate salt stress. This study indicates that, under high NaCl concentration, inoculation with modified A. lipoferum reduced the deleterious effects of NaCl; colonization patterns on roots were unaffected and the genetic marker did not induce undesirable effects on the interaction between the bacterium and the plants MH - Cuba MH - Mexico|Baja California Sur PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 8 U4 - Soil Science U5 - J;Article AV - English IS - 0178-2762 UR - ISI:000223263900007 L2 - Azospirillum. gfp.;plant growth-promoting bacteria;PGPR;salt stress mitigation;GREEN FLUORESCENT PROTEIN; BRASILENSE CD; SALINE STRESS; RHIZOSPHERE BACTERIA; GENE-EXPRESSION; PLANT-GROWTH; ROOT-SURFACE; VICIA-FABA; INOCULATION; COLONIZATION SO - Biology and Fertility of Soils 2004 ;40(3):188-193 10101 UI - 3581 AU - Bader RFW AU - Matta CF AD - McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, CanadaUniv Nacl Autonoma Mexico, Fac Quim, Dept Quim Organ, Mexico City 04510, DF, MexicoBader, RFW, McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada TI - Where to draw the line in defining a molecular structure AB - It is the purpose of this paper to demonstrate how the theory of atoms in molecules (AIM) can be used to complement molecular orbital models to obtain an increased understanding of molecular structure and reactivity. The oxidative addition reaction of a hydrosilane with a Mn cyclopentadienyl dicarbonyl fragment, a common constituent of a large class of organometallic complexes, provides an ideal vehicle for demonstrating the ability of AIM to not only define structure but to predict its possible instabilities, as well as recovering the rationalizations of frontier orbital theory regarding the susceptibility and mode of attack encountered in the addition reaction MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000225754200028 L2 - METAL-METAL BOND; BINUCLEAR COMPLEXES; ELECTRON-DENSITY; CHARGE-DENSITY; ATOMS; LAPLACIAN; PAIR SO - Organometallics 2004 ;23(26):6253-6263 10102 UI - 3985 AU - Badillo-Ponce G AU - Fernandez-Pavia SP AU - Grunwald NJ AU - Garay-Serrano E AU - Rodriguez-Alvarado G AU - Lozoya-Saldana H AD - ICAMEX, Conjunto SEDAGRO Metepec, Mexico City 52140, DF, MexicoUniv Michoacana, Inst Invest Agropecuarias & Forestales, Tarimbaro 58880, MexicoUSDA ARS, Corvallis, OR 97330, USAIFIT, Col Postgrad, Montecillo 56230, MexicoUniv Autonoma Chapingo, Chapingo 56230, MexicoBadillo-Ponce, G, ICAMEX, Conjunto SEDAGRO Metepec, Mexico City 52140, DF, Mexico TI - First report of blight on Ipomoea purpurea caused by Phytophthora ipomoeae MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;News Item AV - English IS - 0191-2917 UR - ISI:000224689500021 L2 - TOLUCA VALLEY SO - Plant Disease 2004 ;88(11):1283-1283 10103 UI - 6223 AU - Baeza I AU - Leyva E AU - Campos B AU - Lara M AU - Ibanez M AU - Farfan N AU - Orozco H AU - Flores-Romo L AU - Hernandez-Pando R AU - Wong C AD - Natl Polytech Inst, Natl Sch Biol Sci, Dept Biochem, Mexico City 06401, DF, MexicoUniv Cincinnati, Dept Obstet & Gynecol, Cincinnati, OH, USACtr Res & Adv Studies, Dept Chem, Mexico City, DF, MexicoNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Pathol, Mexico City, DF, MexicoCtr Res & Adv Studies, Dept Expt Pathol, Mexico City, DF, MexicoBaeza, I, Natl Polytech Inst, Natl Sch Biol Sci, Dept Biochem, Apartado Postal 129,Admon 4, Mexico City 06401, DF, Mexico TI - Antibodies to non-bilayer phospholipid arrangements induce a murine autoimmune disease resembling human lupus AB - Antibodies recognizing non-bilayer phospholipid arrangements (NPA) in membrane models and in cell membranes in vivo, triggered an autoimmune-like disease in mice. This exhibited features similar to human lupus and was induced by injecting mice either with the H308 monoclonal antibody specific to NPA, with sera from mice which already had developed the autoimmune disease, or with liposomes; treated with the NPA inductors chlorpromazine or procainamide; or with these NPA inductors alone. All these procedures revealed the involvement of antibodies to non-bilayer phospholipids in inducing this autoimmune-like disease. Unraveling the mechanisms of these antibodies might contribute to a better understanding of the molecular and immunological basis of autoimmune diseases like lupus and, hopefully, towards the development of better therapeutic strategies MH - Mexico|Distrito Federal MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Immunology U5 - J;Article AV - English IS - 0014-2980 UR - ISI:000188980400031 L2 - autoimmune diseases;lupus-like;non-bilayer phospholipids;murine-lupus;auto-antibodies;ANTIPHOSPHOLIPID SYNDROME; DIVALENT-CATIONS; APOPTOTIC CELLS; CHLORPROMAZINE; PHOSPHATIDATE; ERYTHEMATOSUS; LIPOSOMES; MEMBRANES; PHOSPHATIDYLETHANOLAMINE; STANDARDIZATION SO - European Journal of Immunology 2004 ;34(2):576-586 10104 UI - 3851 AU - Bagnoli F AU - Franci F AU - Rechtman R AD - Univ Florence, Dipartimento Energet, I-50139 Florence, ItalyUniv Florence, Ctr Interdipartimentale Studio Dinamiche Compless, I-50139 Florence, ItalyUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoINFM, Sez Firenze, Florence, ItalyIst Nazl Fis Nucl, Sez Firenze, I-50125 Florence, ItalyBagnoli, F, Univ Florence, Dipartimento Energet, Via S Marta,3, I-50139 Florence, Italy TI - Chaos in a simple cellular automaton model of a uniform society AB - In this work we study the collective behavior in a model of a simplified homogeneous society. Each agent is modeled as a binary "perceptron", receiving neighbors' opinions as inputs and outputting one of two possible opinions, according to the conformist attitude and to the external pressure of mass media. For a neighborhood size greater than three, the system shows a very complex phase diagram, including a disordered phase and chaotic behavior. We present analytic calculations, mean fields approximation and numerical simulations for different values of the parameters MH - Italy MH - Mexico|Morelos PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224949700053 L2 - DAMAGE-SPREADING TRANSITIONS; LYAPUNOV EXPONENTS; DIRECTED PERCOLATION; NEURAL NETWORKS SO - Cellular Automata, Proceedings 2004 ;3305():513-522 10105 UI - 6607 AU - Baidyk T AU - Kussul E AU - Makeyev O AU - Caballero A AU - Ruiz L AU - Carrera G AU - Velasco G AD - Univ Nacl Autonoma Mexico, Ctr Appl Sci & Technol Dev, Mexico City 04510, DF, MexicoNatl Taras Shevchenko Univ Kyiv, UA-01033 Kiev, UkraineBaidyk, T, Univ Nacl Autonoma Mexico, Ctr Appl Sci & Technol Dev, Cd Univ,AP 70-186, Mexico City 04510, DF, Mexico TI - Flat image recognition in the process of microdevice assembly AB - An image recognition system for use in the assembly of microdevices is developed. The system gives an increase in the assembly process precision. A pin-to-hole insertion task was used to test developed system. The system will be used for assembly of microring-based filters. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0167-8655 UR - ISI:000187554800010 L2 - microassembly;image recognition;neural classifier;neural interpolator SO - Pattern Recognition Letters 2004 ;25(1):107-118 10106 UI - 3883 AU - Baille WE AU - Zhu XX AU - Fomine S AD - Univ Montreal, Dept Chim, Montreal, PQ H3C 3J7, CanadaNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoZhu, XX, Univ Montreal, Dept Chim, CP 6128,Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada TI - Study of self-diffusion of hyperbranched polyglycidols in poly(vinyl alcohol) solutions and gels by pulsed-field gradient NMR spectroscopy AB - In an effort to further understand the effects of molecular size and shape of macromolecular diffusants on the diffusion in hydrophilic polymer solutions and gels, hyperbranched polyglycidols have been synthesized as hydrophilic diffusants and characterized. Four of these hyperbranched polymers were selected for the study of self-diffusion by pulsed-field gradient NMR spectroscopy in poly(vinyl alcohol)-water systems. The effects of the molecular weight, size, and shape of the diffusant, polymer concentration, and temperature have been studied. For diffusants of similar molecular weight and without specific interactions, the activation energy decreases from the dendrimers to hyperbranched polymers and then to linear polymers. The results indicate that the molecular shape, and hence the molecular density distribution of the diffusants, is important in the diffusion process MH - Canada MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000225056800014 L2 - SPIN-ECHO NMR; MOLECULAR-SIZE DISTRIBUTION; POLYMER-SOLVENT SYSTEMS; GAMMA-RAY IRRADIATION; 3-DIMENSIONAL POLYMERS; AQUEOUS-SOLUTIONS; FREE-VOLUME; POLY(PROPYLENEIMINE) DENDRIMERS; POLY(METHYL METHACRYLATE); LIGHT-SCATTERING SO - Macromolecules 2004 ;37(23):8569-8576 10107 UI - 3834 AU - Baisch ALM AU - Urban H AU - Ruiz AN AD - Fdn Univ Fed Rio Grande, Dept Ciencias Fisiol, Setor Farmacol, Rio Grande, RS, BrazilInst Mexicano Seguro Social, Unidad Invest Biomed Occidente, Div Neurociencias, Lab Neurofarmacol, Mexico City, DF, MexicoBaisch, ALM, Fdn Univ Fed Rio Grande, Dept Ciencias Fisiol, Setor Farmacol, Rio Grande, RS, Brazil TI - Endothelium-dependent vasorelaxing activity of aqueous extracts of lyophilized seeds of Casimiroa edulis (AECe) on rat mesenteric arterial bed AB - The vasorelaxing activity of the aqueous extracts of Casimiroa edulis seeds F(AECe) on mesenteric arterial bed (MAB) of rats was studied. MAB precontracted with methoxamine was mounted on a tissue bath and exposed to plant extracts (bolus 50,500,2500 and 5000 mug). The bolus injections of AECe significantly inhibited, in a concentration-dependent manner, the maximal contractile response induced by metboxamine (30 mum) in MAB. After endothelium removal, the vascular ability of Casimiroa edulis aqueous extract was significantly changed. Treatment with an inhibitor of NO synthase (L-NOA, 10 muM) also modified the AECe effect. The guanilate cyclase inhibitor methylene blue (MB, 100 muM) inhibited the AECe-induced vasodilatation. These results suggest the involvement of NO of endothelial source (or related factors) in this vasodilator effect. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000225154500009 L2 - Casimiroa edulis;endothelium;mesenteric arterial bed;NO;vasodilator;NITRIC-OXIDE; OBLIGATORY ROLE; BLOOD-PRESSURE; SMOOTH-MUSCLE; L-ARGININE; RELAXATION; PHARMACOLOGY; SUBSTANCE; CELLS SO - Journal of Ethnopharmacology 2004 ;95(2-3):163-167 10108 UI - 4089 AU - Bakris GL AU - Gaxiola E AU - Messerli FH AU - Mancia G AU - Erdine S AU - Cooper-DeHoff R AU - Pepine CJ AD - Rush Univ, Med Ctr, Chicago, IL 60612, USAInst Cardiovasc Guadalajara, Guadalajara, Jalisco, MexicoAlton Ochsner Med Fdn & Ochsner Clin, New Orleans, LA 70121, USAUniv Milano Bicocca, Med Clin, Milan, ItalyUniv Milano Bicocca, Ctr Interuniv Fisiol Clin & Ipertens, Milan, ItalyUniv Istanbul, Cardiol Inst, Istanbul, TurkeyUniv Florida, Gainesville, FL, USABakris, GL, Rush Med Univ, 1700 W Van Buren St,Suite 470, Chicago, IL 60612 USA TI - Clinical outcomes in the diabetes cohort of the international verapamil SR-Trandolapril study AB - The INternational VErapamil SR-Trandolapril study (INVEST) had 6400 of 22 576 (28.3%) participants with diabetes at entry. The objectives of this prespecified analysis were to compare antihypertensive treatment strategies in the diabetes cohort (verapamil SR-based [n = 3169] versus atenolol-based [n = 3231]) and identify predictors for the primary outcome (a composite of first occurrence of all-cause death, nonfatal myocardial infarction, or nonfatal stroke). During a mean follow-up of 2.7 years, 913 participants with diabetes experienced a primary outcome event, with no significant difference between treatment strategies (14.6%, verapamil SR versus 13.9%; atenolol hazard ratio, 1.05; 95% confidence interval, 0.92 to 1.19). Risk for the primary outcome increased with presence of baseline heart failure, renal impairment, US residency, age, previous stroke/transient ischemic attack, previous myocardial infarction, peripheral vascular disease, or smoking. High systolic and diastolic pressures during follow-up also were associated with increased risk, as were low diastolic pressures. Antihypertensive treatment with a verapamil SR or atenolol strategy resulted in similar rates of cardiovascular outcomes in coronary artery disease (CAD) patients with diabetes. Thus, a verapamil SR-based antihypertensive treatment strategy is an alternative to a beta-blocker-based strategy in adults with CAD and diabetes MH - USA MH - Italy MH - Mexico|Jalisco MH - Turkey PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 21 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0194-911X UR - ISI:000224761500012 L2 - blood pressure;diabetes mellitus;coronary artery disease;calcium antagonists;CORONARY-ARTERY-DISEASE; BODY-MASS INDEX; BLOOD-PRESSURE; CARDIOVASCULAR EVENTS; RANDOMIZED-TRIAL; ANTIHYPERTENSIVE TREATMENT; WAIST CIRCUMFERENCE; RISK-FACTORS; HYPERTENSION; MORTALITY SO - Hypertension 2004 ;44(5):637-642 10109 UI - 4172 AU - Balakin A AU - Sussman RA AU - Zimdahl W AD - Kazan VI Lenin State Univ, Dept Gen Relat & Gravitat, Kazan 420008, RussiaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50937 Cologne, GermanyBalakin, A, Kazan VI Lenin State Univ, Dept Gen Relat & Gravitat, Kazan 420008, Russia TI - Maxwell-Boltzmann gas with nonstandard self-interactions: A novel approach to galactic dark matter AB - Using relativistic kinetic theory, we study spherically symmetric, static equilibrium configurations of a collisionless Maxwell-Boltzmann gas with nonstandard self-interactions, modeled by an effective one-particle force. The resulting set of equilibrium conditions represents a generalization of the classical Tolman-Oppenheimer-Volkov equations. We specify these conditions for two types of Lorentz-like forces: one coupled to the 4-acceleration and the 4-velocity and the other one coupled to the Riemann tensor. We investigate the weak field limits in each case and show that they lead to various Newtonian type configurations that are different from the usual isothermal sphere characterizing the conventional Newtonian Maxwell-Boltzmann gas. These configurations could provide a plausible phenomenological and theoretical description of galactic dark matter halo structures. We show how the self-interaction may act phenomenologically as an effective cosmological constant and discuss possible connections with Modified Newtonian Dynamics (MOND) MH - Germany MH - Mexico|Distrito Federal MH - Russia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000224462000069 L2 - PHASE-SPACE DENSITIES; NEWTONIAN DYNAMICS; KINETIC-THEORY; GALAXY; HALOS; MASS; CONSTRAINTS; RESOLUTION; COSMOLOGY; PROFILE SO - Physical Review D 2004 ;70(6): 10110 UI - 3314 AU - Balcar B AU - Hernandez-Hernandez F AU - Hrusak M AD - Acad Sci Czech Republ, Inst Math, CR-11567 Prague 1, Czech RepublicUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoBalcar, B, Acad Sci Czech Republ, Inst Math, Zitna 25, CR-11567 Prague 1, Czech Republic TI - Combinatorics of dense subsets of the rationals AB - We study combinatorial properties of the partial order (Dense(Q), subset of or equal to). To do that we introduce cardinal invariants p(Q), t(Q), h(Q), s(Q), t(Q), i(Q) describing properties of Dense(Q). These invariants satisfy p(Q) less than or equal to t(Q) less than or equal to h(Q) less than or equal to s(Q) less than or equal to r(Q) less than or equal to i(Q). We compare them with their analogues in the well studied Boolean algebra P(omega)/fin. We show that p(Q) = p. t(Q) = t and i(Q) = i, whereas h(Q) > h and tau(Q) > tau axe both shown to be relatively consistent, with ZFC. We also investigate combinatorics of the ideal nwd of nowhere dense sub-bets of Q. In particular, we show that non(M) = min{\D\ : subset of or equal to Dense(R) Lambda (For AllI epsilon nwd(R))(There ExistsD epsilon D) (I boolean AND D = phi)} and cof (M) = min{\D\ : D subset of or equal to Dense(Q) Lambda (For AllI epsilon nwd)(There ExistsD epsilon D)(I n D We use these facts to show that cof (M) less than or equal to i, which improves a result of S. Shelah MH - Czech Republic MH - Mexico|Michoacan PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0016-2736 UR - ISI:000226525000004 SO - Fundamenta Mathematicae 2004 ;183(1):59-80 10111 UI - 4304 AU - Baldovin F AD - Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBaldovin, F, Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil TI - On time and ensemble averages in quasistationary state of low-dimensional Hamiltonian maps AB - We discuss the relation between ensemble and time averages for quasistationary states of low-dimensional symplectic maps that present remarkable analogies with similar states detected in many-body long-range-interacting Hamiltonian systems. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000224217100019 L2 - nonlinear dynamics;statistical mechanics;quasistationary states;SYSTEMS SO - Physica A-Statistical Mechanics and Its Applications 2004 ;342(1-2):119-125 10112 UI - 4802 AU - Baldovin F AU - Moyano LG AU - Majtey AP AU - Robledo A AU - Tsallis C AD - Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilUniv Nacl Cordoba, Fac Matemat Astron & Fis, RA-5000 Cordoba, ArgentinaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoSanta Fe Inst, Santa Fe, NM 87501, USABaldovin, F, Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil TI - Ubiquity of metastable-to-stable crossover in weakly chaotic dynamical systems AB - We present a comparative study of several dynamical systems of increasing complexity, namely, the logistic map with additive noise, one, two and many globally coupled standard maps, and the Hamiltonian mean field model (i.e., the classical inertial infinitely ranged ferromagnetically coupled XY spin model). We emphasize the appearance, in all of these systems, of metastable states and their ultimate crossover to the equilibrium state. We comment on the underlying mechanisms responsible for these phenomena (weak chaos) and compare common characteristics. We point out that this ubiquitous behavior appears to be associated to the features of the nonextensive generalization of the Boltzmann-Gibbs statistical mechanics. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Brazil MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000222924800027 L2 - nonlinear dynamics;statistical mechanics;metastable (quasistationary) states;HAMILTONIAN-SYSTEMS; INITIAL CONDITIONS; EQUILIBRIUM; SENSITIVITY; BEHAVIOR; MODEL; RANGE SO - Physica A-Statistical Mechanics and Its Applications 2004 ;340(1-3):205-218 10113 UI - 5542 AU - Baldovin F AU - Robledo A AD - Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBaldovin, F, Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil TI - Nonextensive Pesin identity: Exact renormalization group analytical results for the dynamics at the edge of chaos of the logistic map AB - We show that the dynamical and entropic properties at the chaos threshold of the logistic map are naturally linked through the nonextensive expressions for the sensitivity to initial conditions and for the entropy. We corroborate analytically, with the use of the Feigenbaum renormalization group transformation, the equality between the generalized Lyapunov coefficient lambda(q) and the rate of entropy production, K-q, given by the nonextensive statistical mechanics. Our results advocate the validity of the q-generalized Pesin identity at critical points of one-dimensional nonlinear dissipative maps MH - Brazil MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 29 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000221253000007 L2 - HAMILTONIAN-SYSTEMS SO - Physical Review e 2004 ;69(4): 10114 UI - 3609 AU - Baldwin SB AU - Djambazov B AU - Papenfuss M AU - Abrahamsen M AU - Denman C AU - de Zapien JG AU - Ortega L AU - Henze JLN AU - Hunter J AU - Rojas M AU - Garcia F AU - Giuliano AR AD - Vet Hlth Adm Greater Los Angeles, Sepulveda Ambulatory Care Ctr, Sepulveda, CA, USAArizona Dept Hlth Serv, Phoenix, AZ 85007, USAH Lee Moffit Canc Ctr & Res Inst, Tampa, FL, USAColegio Sonora Hermosillo, Sonora, MexicoUniv Arizona, Rural Hlth Off, Tucson, AZ, USAPan Amer Hlth Org, El Paso, TX, USASecretaria Salud Publ Sonora, Sonora, MexicoArizona Canc Ctr, Tucson, AZ, USAPima Cty Hlth Dept, Tucson, AZ, USAUniv Arizona, Arizona Coll Publ Hlth, Tucson, AZ, USABaldwin, SB, Vet Hlth Adm Greater Los Angeles, Sepulveda Ambulatory Care Ctr, 16111 Plummer St, Sepulveda, CA USA TI - Chlamydial infection in women along the US-Mexico border AB - Few studies have reported on sexually transmitted infections at the US-Mexico border, so the prevalence of Chlamydia trachomatis in this population remains uncertain. This binational project investigated the prevalence of, and risk factors for, C. trachomatis among women along the Arizona, US-Sonora, Mexico border. Women who self-referred for routine gynaecological care were invited to complete an interviewer-administered questionnaire and to undergo a Pap smear, C. trachomatis test, and HPV test. In 2270 women, C. trachomatis prevalence overall was 8.2% as measured by hybrid capture and 2.6% by enzyme immunoassay. Infection was associated with young age, a history of new sexual partner(s) in the previous three months, HPV infection, and proximity of clinic to the international border. Antibiotic use in the previous 30 days was associated with decreased odds of infection. Women in Arizona-Sonora border communities are at increased risk for C. trachomatis infection compared to women attending clinics in non-border locations MH - USA MH - Mexico|Sonora PB - LONDON: ROYAL SOC MEDICINE PRESS LTD RP - NOT IN FILE U3 - TC 1 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0956-4624 UR - ISI:000225964000008 L2 - chlamydia;sexually transmitted diseases;border health;international health;SEXUALLY-TRANSMITTED-DISEASES; INVASIVE CERVICAL-CANCER; TRACHOMATIS INFECTIONS; HUMAN-PAPILLOMAVIRUS; NEISSERIA-GONORRHOEAE; UNITED-STATES; SCREENING-CRITERIA; PREVALENCE; POPULATION; ANTIBODIES SO - International Journal of Std & Aids 2004 ;15(12):815-821 10115 UI - 5039 AU - Bali S AU - Singh AK AU - Sharma P AU - Toscano RA AU - Drake JE AU - Hursthouse MB AU - Light ME AD - Indian Inst Technol, Dept Chem, New Delhi 110016, IndiaUNAM, Inst Quim, Mexico City 04510, DF, MexicoUniv Windsor, Dept Chem & Biochem, Windsor, ON N9B 3P4, CanadaUniv Southampton, Dept Chem, Southampton SO17 1BJ, Hants, EnglandSingh, AK, Indian Inst Technol, Dept Chem, New Delhi 110016, India TI - 2-[2-(4-Methoxyphenyltelluro)ethyl]thiophene (L-1) bis[2-(2-thienyl)ethyl] telluride (L-2) and their metal complexes; crystal structure of trans-dichlorobis{2-(2-(4-methoxyphenyltelluro)ethyl) thiophene-Te}palladium(II) and {bis[2-(2-thienyl)ethyll telluride} dichloro(p-cymene)ruthenium(II) AB - The reaction of ArTe- (Ar = 4-MeOC6H4) and Te2- generated in situ by borohydride reduction of Ar2Te2 and Te, respectively, with 2-(2-thienyl)ethyl chloride has resulted in 2-[2-(4-methoxyphenyltelluro)ethyl]thiophene (L-1) and bis[2-(2-thienyl)ethyl] telluride (L-2), respectively. Their complexes [AgNO3(L-1)] (1) [PdCl2(L-1)(2)] (2) [PtCl2(L-1)(2)] (3) [HgBr2(L-1)](2) (4) [Ru(p-cymene)Cl-2(L-1)] (5) [Ru(p-cymene)Cl-2(L-2)] (6) and [PdCl2(L-2)(2)] have been synthesized. The ligands and complexes exhibit characteristic H-1 and C-13{H-1} NMR spectra. Both the ligands coordinate only through Te in all the complexes. The single crystals of 2 and 6 are characterized by X-ray diffraction. Compound 2 has square planar geometry around Pd and trans arrangement of ligands. The Pd-Te bond distances 2.5951(7) and 2.5872(7) Angstrom are longer than the values expected due to strong trans influence. The unique intermolecular secondary Te...Cl interaction (distance = 3.450/3.449 Angstrom) between neighbouring molecules has been observed in the crystal structure of 2. The distance between Pd atoms of two neighbouring molecules 3.2143(10) Angstrom has also been found less than the sum of van der Waal's radii 3.26 Angstrom. These secondary interactions in 2 result in the formation of a dimeric species, which remains intact even in the solution. Compound 6 is a half sandwich having three coordination sites occupied by two Cl atoms and the Te atom of L-2 with Ru-Te bond distance of 2.6528(9) Angstrom and Ru-Cl, 2.415(2)/2.422(2) Angstrom. (C) 2004 Elsevier B.V. All rights reserved MH - Canada MH - United Kingdom MH - India MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000222416800009 L2 - 2-[2-(4-methoxyphenyltelluro)ethyl]thiophene;bis[2-(2-thienyl)ethyl] telluride;organotellurium ligands;metal complexes;synthesis;crystal structure;RUTHENIUM(II) COMPLEXES; ORGANOTELLURIUM LIGANDS; THIO-ETHER; CHEMISTRY; LIGATION; PALLADIUM(II); RU(II); IODINE SO - Journal of Organometallic Chemistry 2004 ;689(14):2346-2353 10116 UI - 4359 AU - Ballesteros MN AU - Cabrera RM AU - Saucedo MD AU - Fernandez ML AD - Univ Connecticut, Dept Nutr Sci, Storrs, CT 06269, USACtr Invest & Desarrollo AC, Hermosillo, Sonora, MexicoFernandez, ML, Univ Connecticut, Dept Nutr Sci, 3624 Horsebarn Rd Extens,U 4017, Storrs, CT 06269 USA TI - Dietary cholesterol does not increase biomarkers for chronic disease in a pediatric population from northern Mexico AB - Background: An increased incidence of coronary artery disease (CAD) is prevalent in northern Mexico. Effects of specific dietary components on risk factors for CAD have not been evaluated in children. Objective: The purpose was to evaluate the effects of dietary cholesterol provided by whole eggs on the lipoprotein profile, LDL size, and phenotype in children from this region. Design: Children (29 girls and 25 boys aged 8-12 y) were randomly assigned to either 2 eggs/d (EGG period; 518 additional mg cholesterol) or the equivalent amount of egg whites (SUB period; 0 additional mg cholesterol) for 30 d. After a 3-wk washout period, the children were assigned to the alternate treatment. Results: Subjects were classified as hyporesponders (no increase or less than or equal to0.05 mmol/L increase in plasma cholesterol for 100 mg additional cholesterol) or hyperresponders (greater than or equal to0.06 mmol/L increase). During the EGG period, the hyperresponders (n = 18) had an elevation in both LDL cholesterol (from 1.54 +/- 0.38 to 1.93 +/- 0.36 mmol/L) and HDL cholesterol (from 1.23 +/- 0.26 to 1.35 +/- 0.29 mmol/L) with no changes in LDL:HDL. In contrast, hyporesponders (n = 36) had no significant alterations in plasma LDL or HDL cholesterol. All subjects had an increase in LDL peak diameter during the EGG period (P < 0.01) and a decrease (P < 0.01) in the smaller LDL subfractions. In addition, 5 of the children having LDL phenotype B (15%) shifted from this high-risk pattern to pattern A after the EGG treatment. Conclusions: Intake of 2 eggs/d results in the maintenance of LDL: HDL and in the generation of a less atherogenic LDL in this population of Mexican children MH - USA MH - Mexico|Sonora PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 5 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000224073000009 L2 - dietary cholesterol;children;LDL atherogenicity;LDL cholesterol;HDL cholesterol;CORONARY-HEART-DISEASE; DENSITY-LIPOPROTEIN CHOLESTEROL; APOLIPOPROTEIN-A-I; SERUM-CHOLESTEROL; ARTERY DISEASE; ENZYMATIC DETERMINATION; PLASMA-LIPIDS; FATTY-ACIDS; RISK FACTOR; MEN SO - American Journal of Clinical Nutrition 2004 ;80(4):855-861 10117 UI - 4516 AU - Ballestrin J AU - Estrada CA AU - Rodriguez-Alonso M AU - Perez-Rabago C AU - Langley LW AU - Barnes A AD - CIEMAT, E-04200 Tabernas, Almeria, SpainUNAM, Temixco 62580, Morelos, MexicoVatell Corp, Christiansburg, VA 24073, USABallestrin, J, CIEMAT, Plataforma Solar Almeria,Aptdo 22, E-04200 Tabernas, Almeria, Spain TI - High-heat-flux sensor calibration using calorimetry AB - This paper demonstrates a calorimetric procedure for calibrating high-heat-flux sensors. The results are in agreement with calibrations obtained using black-body radiation. However, the proposed method has the potential of being more accurate than traditional approaches. This new procedure calibrates sensors to measure correctly under conditions of concentrated solar radiation. At present, the thermal balance calibration technique in the laboratory is limited to solar irradiances of approximately 100 kW m(-2). The next step is to demonstrate this methodology to higher irradiances under non-laboratory conditions in the CIEMAT solar furnace at Plataforma Solar de Almerfa MH - Mexico|Morelos MH - Spain MH - USA PB - SEVRES CEDEX: BUREAU INT POIDS MESURES RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0026-1394 UR - ISI:000223542800016 SO - Metrologia 2004 ;41(4):314-318 10118 UI - 6348 AU - Ballinas MD AU - De San Miguel ER AU - Rodriguez MTD AU - Silva O AU - Munoz M AU - de Gyves J AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, MexicoUniv Autonoma Barcelona, Fac Ciencies, Unitat Quim Analit, E-08193 Barcelona, SpainUniv Rovira & Virgili, ETSEQ, Dept Ingn Quim, Tarragona 43007, SpainDe Gyves, J, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Analit, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Arsenic(V) removal with polymer inclusion membranes from sulfuric acid media using DBBP as carrier AB - Polymer inclusion membranes (PIMs) based on cellulose triacetate (CTA) and dibutyl butyl phosphonate (DBBP) were tested for arsenic(V) separation from H2SO4 for its recovery from copper electrolytes. Solvent extraction experiments allowed the determination of the As(V)DBBP and H2SO4-DBBP complexes formed in the organic phase. Application of a transient model to membrane transport experiments in solutions containing only arsenic or H2SO4 indicated that it occurred under a kinetically controlled regime by formation of H3AsO4[DBBP](2) and H2SO4[DBBP] species, respectively. When arsenic and H2SO4 are simultaneously present, the existence of a third species, H3AsO4[DBBP][H2SO4], explains well the fact that As(V) flux decreases and that H2SO4 flux increases. In both cases, a limiting 50% recovery value was obtained. However, active arsenic transport (> 50%) is achieved if the H2SO4 concentration gradient is assured (e.g., using a triple-cell configuration). In this way, high arsenic recovery factors (90% in 800 min) were obtained with initial concentrations of 5000 mg/L As(V) and 220 g/L H2SO4. In all membrane systems tested, good As(V) selectivity over copper (up to 30 000 mg/L) was attained MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0013-936X UR - ISI:000188656000044 L2 - SUPPORTED LIQUID-MEMBRANES; EXTRACTION; TRANSPORT; MIXTURES; RECOVERY SO - Environmental Science & Technology 2004 ;38(3):886-891 10119 UI - 6390 AU - Balmori-Ramirez H AU - Rocha-Rangel E AU - Refugio-Garcia E AU - Bradt RC AD - Inst Politec Nacl, Dept Engn Met, ESIQIE, Mexico City 07300, DF, MexicoUniv Autonoma Metropolitana Azcapotzalco, Dept Mat Engn, Azcapotzalco 02200, DF, MexicoUniv Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487, USABalmori-Ramirez, H, Inst Politec Nacl, Dept Engn Met, ESIQIE, Mexico City 07300, DF, Mexico TI - Dense mullite from attrition-milled kyanite and aluminum metal AB - Dense mullite was produced through the reaction and sintering of an attrition-milled mixture of kyanite (Al2O3.SiO2) and aluminum metal. Kyanite and aluminum were attrition-milled then slowly heated at 1degreesC/min to 1100degreesC in air, and rapidly heated to 1600degreesC and held for 1 h. During heating, the aluminum metal is oxidized first in the solid state and then as a liquid. The attrition-milled kyanite decomposes yielding mullite and rejecting silica, which then reacts with the alumina formed from oxidation of the aluminum. Expansion from the aluminum oxidation and kyanite decomposition partially compensates for the normal sintering shrinkage. A dense, fine-grain-size mullite results MH - Mexico|Distrito Federal MH - USA PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000188429200023 L2 - EVOLUTION; CERAMICS SO - Journal of the American Ceramic Society 2004 ;87(1):144-146 10120 UI - 2310 AU - Balogh J AU - Salazar G AD - Ohio State Univ, Dept Math, Columbus, OH 43210, USA. UASLP, IICO, San Luis Potosi 78210, SLP, Mexico TI - Improved bounds for the number of (<= k)-sets, convex quadrilaterals, and the rectilinear crossing number of K-n AB - We use circular sequences to give an improved lower bound on the minimum number of (&LE; k)-sets in a set of points in general position. We then use this to show that if S is a set of n points in general position, then the number &SQU;(S) of convex quadrilaterals determined by the points in S is at least 0.37553((n)(4)) + O(n(3)). This in turn implies that the rectilinear crossing number (cr) over bar (K-n) of the complete graph K-n is at least 0.37553 ((n)(4)) + O((3)(n)). These improved bounds refine results recently K-n obtained by Abrego and Fernindez-Mercham, and by LovAsz, Vesztergombi, Wagner and Welzl MH - Mexico|San Luis Potosi MH - USA T3 - GRAPH DRAWINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlejobal@math.ohio-state.edu gsalazar@cactus.iico.uaslp.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBCD13 AV - English IS - 0302-9743 UR - ISI:000228693700004 SO - 2004 ;():25-35 10121 UI - 3029 AU - Band-Schmidt CJ AU - Morquecho L AU - Lechuga-Deveze CH AU - Anderson DM AD - Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543, USACIBNOR, La Paz 23000, MexicoBand-Schmidt, CJ, IPN, CICIMAR, Dept Plancton & Ecol Marina, Ave Inst Politecn Nacl S-N, La Paz 23000, Baja Calif Sur, Mexico TI - Effects of growth medium, temperature, salinity and seawater source on the growth of Gymnodinium catenatum (Dinophyceae) from Bahia Concepcion, Gulf of California, Mexico AB - Laboratory studies were performed to determine the effect of temperature, salinity, seawater sources and culture media on the vegetative growth of clonal cultures of Gymnodinium catenatum isolated from Bahia Concipcion, Mexico. These isolates were heterothallic and isogamous. Exponential growth rates of G. catenatum in f/2 with different selenium concentrations and soil extract and GSe media were moderate. Maximum cell yields were obtained in GSe and f/2 media with selenium (10(-8) and 10(-7) M), while in f/2 medium with soil extract cell yields were considerably lower. The highest percentage of long chains was found in f/2 media supplied with selenium (10(-8) M). The optimal temperature range for growth was 11.5-30degreesC, with the highest growth rates between 21 and 29degreesC. The range of salinity tolerated by G. catenation changed with seawater source. With seawater from Vineyard Sound (Massachusetts, USA), G. catenatum grew at salinities from 15 to 36, with an optimal growth rate obtained at salinities between 26 and 30. Willi seawater from Bahia Concepcion, this species tolerated salinities from 25 to 40, with optimal growth at salinities between 28 and 38. Ecophysiological measurements reported here are consistent with the environment of the bay, which has limited input of humic materials from runoff and high salinity and temperature. These data, when viewed with data from studies of globally distributed G. catenation, demonstrate the ability of this species to live in a broad array of habitats MH - Mexico|Baja California Sur MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0142-7873 UR - ISI:000227233500008 L2 - SHELLFISH TOXIN PROFILES; GONYAULAX-TAMARENSIS; ALEXANDRIUM-MINUTUM; RED TIDE; PHYTOPLANKTON; GRAHAM; BAY; SUBSTANCES; CULTURE; ALGAE SO - Journal of Plankton Research 2004 ;26(12):1459-1470 10122 UI - 5315 AU - Bandala ER AU - Martinez D AU - Martinez E AU - Dionysiou DD AD - Inst Mexicano Tecnol Agua, Jiutepec 62550, Morelos, MexicoUniv Nacl Autonoma Mexico, Fac Ingn, Div Estudios Posgrado, Jiutepec 62550, Morelos, MexicoVarian Mexico, Mexico City 03100, DF, MexicoUniv Cincinnati, Dept Civil & Environm Engn, Cincinnati, OH 45221, USABandala, ER, Inst Mexicano Tecnol Agua, Paseo Cuauhnahuac 8532, Jiutepec 62550, Morelos, Mexico TI - Degradation of microcystin-LR toxin by Fenton and photo-Fenton processes AB - This study reports a laboratory investigation of the degradation of microcystin-LR using Fenton (Fe2+ + H2O2) and Photo-Fenton processes. The effect of hydrogen peroxide concentration on the Fenton reaction rate was investigated at constant Fe2+ concentrations. It was observed that at low concentrations of hydrogen peroxide (0.25-0.5 mM), the extent of microcystin-LR degradation was low, even after prolonged reaction time (up to 600 min). Higher H2O2 concentrations (2.5-5 mM) resulted in higher degradation rates that yielded microcystin-LR degradation as high as 60% in approximately 180 min. However, the highest degradation efficiency of the toxin was achieved during the Photo-Fenton process in which UV radiation was involved. In the Photo-Fenton process, the removal efficiency of microcystin-LR reached 84% in the first 25 min and 100% in approximately 35-40 min of irradiation. These results are encouraging for the application of efficient UV-based advanced oxidation technologies for toxin removal from drinking water sources. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000221821700010 L2 - microcystin-LR;Fenton;photo-Fenton;photocatalysis;toxins;H2O2Fe2+;Fe3+;ferrous;ferric;hydrogen peroxide;drinking water;treatment;advanced oxidation;AOT;TITANIUM-DIOXIDE; PHOTOCATALYTIC OXIDATION; REMOVAL SO - Toxicon 2004 ;43(7):829-832 10123 UI - 5667 AU - Bandres MA AU - Gutierrez-Vega JC AD - Tecnol Monterrey, Photon & Math Opt Grp, Monterrey 64849, MexicoBandres, MA, SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA TI - Ince-Gaussian modes of the paraxial wave equation and stable resonators AB - We present the Ince-Gaussian modes that constitute the third complete family of exact and orthogonal solutions of the paraxial wave equation in elliptic coordinates and that are transverse eigenmodes of stable resonators. The transverse shape of these modes is described by the Ince polynomials and is structurally stable under propagation. Ince-Gaussian modes constitute the exact and continuous transition modes between Laguerre- and Hermite-Gaussian modes. The expansions between the three families are derived and discussed. As with Laguerre-Gaussian modes, it is possible to construct helical Ince-Gaussian modes that exhibit rotating phase features whose intensity pattern is formed by elliptic rings and whose phase rotates elliptically. (C) 2004 Optical Society of America MH - USA MH - Mexico|Nuevo Leon PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 20 U4 - Optics U5 - J;Article AV - English IS - 1084-7529 UR - ISI:000220982700023 L2 - MATHIEU BEAMS; HERMITE; FIELDS SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2004 ;21(5):873-880 10124 UI - 5810 AU - Banhart F AU - Hernandez E AU - Terrones M AD - Univ Mainz, Inst Phys Chem, D-55099 Mainz, GermanyCSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, SpainIPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoBanhart, F, Univ Mainz, Inst Phys Chem, Welderweg 11, D-55099 Mainz, Germany TI - Comment on "Extreme superheating and supercooling of encapsulated metals in fullerenelike shells" - Reply MH - Germany MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0031-9007 UR - ISI:000220606200066 L2 - CARBON ONIONS SO - Physical Review Letters 2004 ;92(13): 10125 UI - 6436 AU - Baptiste P AU - Chrobak M AU - Durr C AU - Jawor W AU - Vakhania N AD - Univ Calif Riverside, Dept Comp Sci, Riverside, CA 92521, USAEcole Polytech, CNRS, LIX, F-91128 Palaiseau, FranceUniv Paris 11, Lab Rech & Informat, F-91405 Orsay, FranceUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62251, Morelos, MexicoChrobak, M, Univ Calif Riverside, Dept Comp Sci, Riverside, CA 92521 USA TI - Preemptive scheduling of equal-length jobs to maximize weighted throughput AB - We study the problem of computing a preemptive schedule of equal-length jobs with given release times, deadlines and weights. Our goal is to maximize the weighted throughput. In Graham's notation this problem is described as (1\r(j); p(j) p; pmtn \Sigma w(j)U(j)). We provide an O(n(4))-time algorithm, improving the previous bound of O(n(10)). (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6377 UR - ISI:000188256800009 L2 - single machine preemptive scheduling;weighted throughput;ALGORITHM SO - Operations Research Letters 2004 ;32(3):258-264 10126 UI - 6284 AU - Barac A AU - Basile J AU - Vazquez-Prado J AU - Gao YA AU - Zheng Y AU - Gutkind JS AD - Natl Inst Dent & Craniofacial Res, Oral & Pharyngeal Canc Branch, NIH, Bethesda, MD 20892, USAIPN, Ctr Invest & Estudios Avanzados, Dept Pharmacol, Mexico City 07360, DF, MexicoChildrens Hosp Res Fdn, Cincinnati, OH 45229, USAGutkind, JS, NIDR, Oral & Pharyngeal Canc Branch, NIH, 30 Convent Dr,Bldg 30,Room 212, Bethesda, MD 20892 USA TI - Direct interaction of p21-activated kinase 4 with PDZ-RhoGEF, a G protein-linked Rho guanine exchange factor AB - Rho GTPases regulate a wide variety of cellular processes, ranging from actin cytoskeleton remodeling to cell cycle progression and gene expression. Cell surface receptors act through a complex regulatory molecular network that includes guanine exchange factors (GEFs), GTPase activating proteins, and guanine dissociation inhibitors to achieve the coordinated activation and deactivation of Rho proteins, thereby controlling cell motility and ultimately cell fate. Here we found that a member of the RGL-containing family of Rho guanine exchange factors, PDZ RhoGEF, which, together with LARG and p115RhoGEF, links the G(12/13) family of heterotrimeric G proteins to Rho activation, binds through its C-terminal region to the serine-threonine kinase p21-activated kinase 4 (PAK4), an effector for Cdc42. This interaction results in the phosphorylation of PDZ RhoGEF and abolishes its ability to mediate the accumulation of Rho-GTP by Galpha(13). Moreover, when overexpressed, active PAK4 was able to dramatically decrease Rho-GTP loading in vivo and the formation of actin stress fibers in response to serum or LPA stimulation. Together, these results provide evidence that PAK4 can negatively regulate the activation of Rho through a direct protein-protein interaction with G protein-linked Rho GEFs, thus providing a novel potential mechanism for cross-talk among Rho GTPases MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000188776500134 L2 - ANCHORAGE-INDEPENDENT GROWTH; LEUKEMIA-ASSOCIATED RHOGEF; HETEROTRIMERIC G-PROTEINS; SERINE/THREONINE KINASE; ACTIN CYTOSKELETON; SIGNALING PATHWAY; COUPLED RECEPTORS; FAMILY GTPASES; CDC42 GTPASES; PAK4 SO - Journal of Biological Chemistry 2004 ;279(7):6182-6189 10127 UI - 4084 AU - Barajas-Ramirez JG AU - Chen GR AU - Shieh LS AD - CICESE, Depto Elect & Telecomunicac, Ensenada 22860, Baja California, MexicoCity Univ Hong Kong, Dept Elect Engn, Ctr Chaos Control & Synchronizat, Hong Kong, Hong Kong, Peoples R ChinaUniv Houston, Dept Elect & Comp Engn, Houston, TX 77204, USABarajas-Ramirez, JG, CICESE, Depto Elect & Telecomunicac, Ensenada 22860, Baja California, Mexico TI - Fuzzy chaos synchronization via sampled driving signals AB - In this paper, a methodology to design a system that robustly synchronizes a master chaotic system from a sampled driving signal is developed. The method is based on the fuzzy Takagi-Sugeno representation of chaotic systems, from which a continuous-time fuzzy observer is designed as the solution of an LMI minimization problem such that the error dynamics have H-infinity disturbance attenuation performance. Then, from the dual-system approach, the fuzzy observer is digitally redesigned such that the performance is maintained for the sampled master system. The effectiveness of the proposed synchronization methodology is finally illustrated via numerical simulations of the chaotic Chen's system MH - Mexico|Baja California MH - Peoples R China MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000224603300008 L2 - chaos synchronization;sampled-data system;robust fuzzy observer;digital redesign;LMI;DIGITAL REDESIGN APPROACH; SECURE COMMUNICATIONS; SYSTEMS; OBSERVER; DESIGN; STABILITY SO - International Journal of Bifurcation and Chaos 2004 ;14(8):2721-2733 10128 UI - 4499 AU - Barandela R AU - Valdovinos RM AU - Sanchez JS AU - Ferri FJ AD - Inst Tecnol Toluca, Metepec 52140, MexicoUniv Jaume 1, Dept Llenguatges & Sistenes Informat, Castello 12071, SpainUniv Valencia, Dept Informat, E-46100 Burjassot, Valencia, SpainBarandela, R, Inst Tecnol Toluca, Ave Tecnol S-N, Metepec 52140, Mexico TI - The imbalanced training sample problem: Under or over sampling? AB - The problem of imbalanced training sets in supervised pattern recognition methods is receiving growing attention. Imbalanced training sample means that one class is represented by a large number of examples while the other is represented by only a few. It has been observed that this situation, which arises in several practical domains, may produce an important deterioration of the classification accuracy, in particular with patterns belonging to the less represented classes. In this paper we present a study concerning the relative merits of several re-sizing techniques for handling the imbalance issue. We assess also the convenience of combining some of these techniques MH - Mexico|Estado De Mexico MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000223398900088 SO - Structural, Syntactic, and Statistical Pattern Recognition, Proceedings 2004 ;3138():806-814 10129 UI - 5247 AU - Barbosa-Solomieu V AU - Miossec L AU - Vazquez-Juarez R AU - scencio-Valle F AU - Renault T AD - IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, FranceCIBNOR, Marine Pathol Unit, La Paz, BCS, MexicoRenault, T, IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France TI - Diagnosis of Ostreid herpesvirus 1 in fixed paraffin-embedded archival samples using PCR and in situ hybridisation AB - In 1994, some of the high mortality episodes that affected oysters cultured in France were associated with herpesviral infections. Through histology analysis, however, viral presence could only be suspected and confirmation of histological diagnosis by transmission electron microscopy was performed in only a few cases. Subsequently, the characterisation and genome sequencing of Ostreid herpesvirus 1 (OsHV-1) made possible the development of specific molecular detection (PCR and in situ hybridisation (ISH)). Using both molecular tools, attempts were made to screen for OsHV-1 a number of fixed, paraffin-embedded oyster samples collected and processed in 1994. The aim was to compare these techniques and to estimate the accuracy of histology-based indication of viral infection. Existing DNA extraction protocols were adapted for oyster samples and two pairs of specific primers targeting small fragments (less than 200 bp) were designed (C-9/C-10 and B-4/B-3)The poor consistency observed between the results of PCR with both primer pairs was confirmed by statistical analysis. C-9/C-10, which targets a repeated region of the OsHV-1 genome, appears to be the primer of choice for viral detection in archival samples. In situ hybridisation may furnish complementary information concerning the localisation of viral foci. Under certain conditions, retrospective examination of archival samples by molecular techniques may therefore provide valuable epidemiological data. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Biochemical Research Methods;Biotechnology & Applied Microbiology;Virology U5 - J;Article AV - English IS - 0166-0934 UR - ISI:000221978500002 L2 - herpesvirus;oyster;Crassostrea gigas;Ostrea edulis;in situ hybridisation;polymerase chain reaction;diagnosis;archival samples;HERPES-LIKE VIRUS; POLYMERASE CHAIN-REACTION; HATCHERY-REARED LARVAE; CRASSOSTREA-GIGAS; OYSTER HERPESVIRUS; MARINE BIVALVES; VIRAL-DNA; TISSUES; AMPLIFICATION; REPLICATION SO - Journal of Virological Methods 2004 ;119(2):65-72 10130 UI - 3080 AU - Barbosa LCD AU - Costa AV AU - Pilo-Veloso D AU - Lopes JLC AU - Hernandez-Terrones MG AU - King-Diaz B AU - Lotina-Hennsen B AD - Univ Fed Vicosa, Dept Quim, BR-36571000 Vicosa, MG, BrazilUniv Fed Minas Gerais, Dept Quim, Belo Horizonte, MG, BrazilUSP, Fac Ciencias Farmaceut Ribeirao Preto, BR-09500900 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Mexico City 04510, DF, MexicoBarbosa, LCD, Univ Fed Vicosa, Dept Quim, BR-36571000 Vicosa, MG, Brazil TI - Phytogrowth-inhibitory lactones derivatives of glaucolide B AB - The sesquiterpene lactone glaucolide B (1), isolated from Vernonia fruticulosa (Asteraceae), was transformed into six lactones (2-7). The structures of the products were elucidated by spectroscopic analysis. A series of solutions of compounds 1-7, at 200 mum, were tested on the germination and on the root and shoot growth of the dicotyledons Physalis ixocarpa and Trifolium alexandrinum and of the monocotyledons Lolium multiflorum and Amaranthus hypochondriacus. Lactone 5 exhibited clear selectivity towards dicotyledonous species at 200 mum, with an average inhibition of 90% on the germination of P. ixocarpa. Lactones 1, 3 and 4 had a greater effect on root length of monocotyledonous species, inhibiting around 70% at 200 mum in L. multiflorum. It seems that the diol function is required in lactones 4-6 to increase the activity, the polarity in the molecule might be required to reach its target MH - Brazil MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000227105100007 L2 - sesquiterpene lactones;herbicidal activity;germination and growth inhibition;GROWTH REGULATORY ACTIVITY; SP NO 13; ELECTRON-TRANSPORT; AGROCHEMICALS; FUNGUS; HERBICIDES; ANALOGS; LEADS; ACID SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2004 ;59(11-12):803-810 10131 UI - 4300 AU - Barboza-Flores M AU - Melendrez R AU - Goncalves JAN AU - Sandonato GM AU - Chernov V AU - Cruz-Zaragoza E AU - Ocboa-Nuno JD AU - Bernal R AU - Cruz-Vazquez C AU - Brown F AD - Univ Sonora, Centro Invest Fis, Hermosillo 86190, Sonora, MexicoInst Nacl Pesquisas Espaciais, Lab Assoc Plasma, BR-12201970 Sao Jose Dos Campos, BrazilNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 86190, Sonora, MexicoBarboza-Flores, M, Univ Sonora, Centro Invest Fis, Apdo Postal 5-088, Hermosillo 86190, Sonora, Mexico TI - Optically stimulated luminescence dosimetry on CVD diamond films AB - Diamond thin films chemically vapor deposited containing different B/C concentration in the range of 2000-20000 ppm were exposed to a P-ray dose of 0.8-3000 Gy. The optically stimulated luminescence (OSL) response of previously irradiated samples was excited with light of 470 nm at room temperature. The OSL decay curves were measured and found them to be a function of the dose exposure. The remaining thermoluminescence (TL) glow curve after optical stimulation indicates the existence of main charge carriers trapped in traps located at 323-523 K, meaning that the OSL emission appears to originate from charge trapped mainly at those traps related to the low temperature TL glow peaks. The results indicate that CVD diamond films perform well as OSL dosimeter for ionizing radiation. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Brazil MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000224152700028 L2 - DETECTORS SO - Physica Status Solidi A-Applied Research 2004 ;201(11):2548-2552 10132 UI - 4939 AU - Barcenas ME AU - Benedito C AU - Rosell CA AD - CSIC, Inst Agroquim & Tecnol Alimentos, Lab Cereales, E-46100 Burjassot, Valencia, SpainUniv Americas, Puebla, MexicoRosell, CA, CSIC, Inst Agroquim & Tecnol Alimentos, Lab Cereales, POB 73, E-46100 Burjassot, Valencia, Spain TI - Use of hydrocolloids as bread improvers in interrupted baking process with frozen storage AB - Hydrocolloids are widely used in the food industry due to their capacity to control both the rheology and texture of aqueous systems. Hydrocolloids have also been very useful as bread improvers in breadmaking due to their antistaling effect. Nevertheless, the effect of these compounds on partially baked frozen bread has not been studied. The purpose of this work was to evaluate the effect of different hydrocolloids (kappa-carrageenan and hydroxypropylmethylcellulose, HPMC) on the fresh bread quality and staling of the partially baked, frozen bread. Regarding fresh bread quality, HPMC increased the specific volume and moisture retention of the bread and reduced the water activity. In addition, textural studies revealed that addition of HPMC reduced the hardness of breadcrumb and inhibited the effect of the frozen storage on the bread staling. The overall results showed that the K-carrageenan was not a good improver for the partially baked frozen bread. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Puebla MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000222666200007 L2 - kappa-carrageenan;HPMC;bread;part-baking;frozen;staling;DOUGH RHEOLOGY; XANTHAN GUM; SHELF-LIFE; GUAR GUM; QUALITY; STARCH; METHYLCELLULOSE; STABILITY; OPTIMIZATION; BREADMAKING SO - Food Hydrocolloids 2004 ;18(5):769-774 10133 UI - 5175 AU - Baret B AU - Aguayo P AU - Benitez MA AU - Arruda L AU - Barao F AU - Barrau A AU - Belmont E AU - Berdugo J AU - Boudoul G AU - Borges J AU - Buenerd M AU - Casadei D AU - Casaus J AU - Delgado C AU - Diaz C AU - Derome L AU - Eraud L AU - Gallin-Martel L AU - Giovacchini F AU - Goncalves P AU - Lanciotti E AU - Laurenti G AU - Malinine A AU - Mana C AU - Marin J AU - Martinez G AU - Menchaca-Rocha A AU - Palomares C AU - Pimenta M AU - Protasov K AU - Sanchez E AU - Seo ES AU - Sevilla I AU - Torrento A AU - Vargas-Trevino M AD - LPSC, F-38026 Grenoble, FranceCIEMAT, E-28040 Madrid, SpainLIP, P-100 Lisbon, PortugalUNAM, Inst Fis, Mexico City, DF, MexicoUniv Bologna, I-40126 Bologna, ItalyIst Nazl Fis Nucl, I-40126 Bologna, ItalyUniv Maryland, College Pk, MD 20742, USABaret, B, LPSC, Ave Martyrs 53, F-38026 Grenoble, France TI - In-beam tests of the AMS RICH prototype with 20 A GeV/c secondary ions AB - A prototype of the AMS Cherenkov imager (RICH) has been tested by means of a low intensity 20 GeV/c per nucleon ion beam coming from the fragmentation of a primary beam of Pb ions. Data have been collected for charges I < Z < similar to45 in various beam conditions and using different radiators. The charge Z and velocity beta resolution have been of the prototype investigated. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Italy MH - Mexico|Distrito Federal MH - Portugal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000221974600025 L2 - AMS experiment;RICH;in-beam tests;fragmentation beam;DETECTOR; COUNTER SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2004 ;525(1-2):126-131 10134 UI - 4435 AU - Barkovich M AU - D'Olivo JC AU - Montemayor R AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoInst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Nacl Cuyo, CAB, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaComis Nacl Energia Atom, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaBarkovich, M, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Active-sterile neutrino oscillations and pulsar kicks AB - We develop a thorough description of neutrino oscillations in a magnetized protoneutron star, based on a resonance layer for neutrinos with different momentum directions. We apply our approach to the calculation of the asymmetry in the neutrino emission during the birth of a neutron star and the pulsar acceleration in the case of an active-sterile neutrino resonant conversion. The observed velocities can be obtained with the magnetic fields expected in the interior of a protoneutron star, for sterile neutrino masses of the order of KeV and small mixing angles MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000223859700014 L2 - EQUIVALENCE PRINCIPLE; STELLAR COLLAPSE; MAGNETIC-FIELD; EARLY UNIVERSE; VELOCITIES; STAR; VIOLATION; ACCELERATION; CONVERSIONS; SUPERNOVAE SO - Physical Review D 2004 ;70(4): 10135 UI - 4060 AU - Barmenkov YO AU - Ortigosa-Blanch A AU - Diez A AU - Cruz JL AU - Andres MV AD - Ctr Invest Opt, Leon 37150, Guanajuato, MexicoUniv Valencia, Inst Ciencia Mat, Dept Fis Aplicada, Burjassot 46100, SpainBarmenkov, YO, Ctr Invest Opt, Leon 37150, Guanajuato, Mexico TI - Time-domain fiber laser hydrogen sensor AB - We report a novel scheme for a fiber-optic hydrogen sensor based on an erbium-doped fiber laser with a palladium-coated tapered fiber within the laser cavity. The tapered fiber acts as a hydrogen-sensing element. When the sensing element is exposed to a hydrogen atmosphere, its attenuation decreases, changing the cavity losses and leading to a modification of the laser transient. The hydrogen concentration is obtained by simple measurement of the buildup time of the laser. This technique translates the measurement of hydrogen concentration into the time domain, and it can be extended to many intensity-based fiber sensors. Relative variations in the buildup time of up to 55% at an increase of the hydrogen concentration from 0 to 10% are achieved with a resolution of better than 0.1%. (C) 2004 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000224600000001 L2 - OPTICAL FIBERS; PALLADIUM; SPECTROSCOPY; GAS SO - Optics Letters 2004 ;29(21):2461-2463 10136 UI - 4416 AU - Barmenkov YO AU - Kir'yanov AV AU - Andres MV AD - Ctr Invest & opt, Guanajuato 37150, MexicoUniv Valencia, Dept Fis Aplicada, E-46100 Burjassot, SpainBarmenkov, YO, Ctr Invest & opt, Loma Bosque 115, Guanajuato 37150, Mexico TI - Resonant and thermal changes of refractive index in a heavily doped erbium fiber pumped at wavelength 980 nm AB - We report a theoretical and experimental study of the refractive index variation in a heavily doped erbium silica fiber within the spectral range 1500-1580 nm under the pumping at the wavelength 980 nm. The two main contributions in the refractive index change are addressed-the resonant part determined by the saturation effect in the fiber and the thermal part stemming from the fiber heating due to the excited-state absorption and Stokes losses. We demonstrate that the thermal contribution in the resultant refractive index change is a notable value, which is the feature of erbium fibers with a high concentration of erbium ions. (C) American Institute of Physics MH - Mexico|Guanajuato MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000224178300006 L2 - SILICA SO - Applied Physics Letters 2004 ;85(13):2466-2468 10137 UI - 5587 AU - Barragan-Huerta BE AU - Peralta-Cruz J AU - Gonzalez-Laredo RF AU - Karchesy J AD - IPN, Escuela Nacl Ciencias Biol, Dept Quim, Mexico City 11340, DF, MexicoInst Tecnol Durango, Mexico City 03400, DF, MexicoOregon State Univ, Coll Forestry, Corvallis, OR 97330, USAPeralta-Cruz, J, IPN, Escuela Nacl Ciencias Biol, Dept Quim, Prolongac Carpio & Plan Ayala, Mexico City 11340, DF, Mexico TI - Neocandenatone, an isoflavan-cinnamylphenol quinone methide pigment from Dalbergia congestiflora AB - A purple pigment neocandenatone (vestitol[6-->9";7O-->7"]obtusaquinone) was isolated from the heartwood of campinceran (Dalbergia congestiflora), an endemic Mexican tree. The isoflavan-cinnamyl phenol quinone methide structure of this compound was elucidated by HRMS, IR, and H-1 and C-13 NMR spectroscopic analysis, including 2D experiments (COSY, NOESY, HMQC and HSQC). (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000221135300021 L2 - Dalbergia congestiflora;Leguminosae;campineran;isoflavan-cinnamylphenol;heartwood pigment;TRADITIONAL MEDICINAL-PLANTS; CANDENATENSIS; ODORIFERA; HEARTWOOD; THAILAND SO - Phytochemistry 2004 ;65(7):925-928 10138 UI - 6252 AU - Barranon A AU - Roa JE AU - Lopez JA AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoUniv Texas, Dept Phys, El Paso, TX 79968, USABarranon, A, Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, Mexico TI - Entropy in the nuclear caloric curve AB - Experimental studies have obtained the caloric curve of nuclear matter from heavy ion collisions and studied its size dependence. This work investigates the thermodynamics of a heavy ion collision and concludes that the plateau temperature of the caloric curve is determined by the entropy generated during the initial part of the collision, which in turn is related to the size of the system MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000188747700029 L2 - GAS PHASE-TRANSITION; MOLECULAR-DYNAMICS; CRITICAL-BEHAVIOR; FRAGMENTATION; CRITICALITY; COLLISIONS; SYSTEMS; MODEL SO - Physical Review C 2004 ;69(1): 10139 UI - 1695 AU - Barraza-Villarreal A AU - Sanchez VD AU - De Jager T AU - Ayotte P AU - Hernandez-Avila M AU - Dewailly E AD - Natl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca 62508, Morelos, MexicoSalvador Zubiran Natl Nutr Inst Subiran, Dept Reprod Biol, Mexico City, DF, MexicoUniv Laval, Ctr Res Reprod Biol, Quebec City, PQ, CanadaUniv Pretoria, Androl Dept Urol, ZA-0002 Pretoria, South AfricaUniv Laval, CHUL CHUQ Res Ctr, Publ Hlth Res Unit, Quebec City, PQ, CanadaHernandez-Avila, M, Natl Inst Publ Hlth, Ctr Populat Hlth Res, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Nonoccupational determinants of plasma DDT and p,p '-DDE in men from chiapas, Mexico AB - A cross-sectional study was conducted to evaluate nonoccupational biological exposure to 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT) compounds and to identify the main factors associated with such exposure in a malaria endemic region in Mexico. Capillary gas column chromatography was used to determine levels of p,p'-DDT and its metabolites in plasma. The mean age of the 144 male participants was 28 yr. Mean p,p'-DDE (1,11 -dichloro-2,2-bis(p-chlorophenyl)ethylene) and p,p'-DDT levels were 203.5 mu g/l and 67.4 mu g/l, respectively. Those whose houses had been sprayed for malaria control had much higher p,p'-DDE levels (p < 0.001). High levels of chlorinated pesticides were found despite being banned in Mexico for agricultural and public health use. Findings demonstrate the role of antimalarial campaigns as a major contributing factor for high DDT plasma levels MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - South Africa PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000230698900007 L2 - contamination;DDT;malaria;Mexico;reproductive health;ORGANOCHLORINE PESTICIDE-RESIDUES; ADIPOSE-TISSUE; BREAST-CANCER; ENDOCRINE DISRUPTORS; WOMEN; EXPOSURE; HEALTH; MILK; AMPHIBIANS; ESTROGENS SO - Archives of Environmental Health 2004 ;59(1):42-49 10140 UI - 6336 AU - Barraza GA AU - Back WE AU - Mata F AD - Tec Monterrey, Grad Sch Business Adm, Monterrey 64849, NL, MexicoClemson Univ, Dept Civil Engn, Clemson, SC 29630, USABarraza, GA, Tec Monterrey, Grad Sch Business Adm, Monterrey 64849, NL, Mexico TI - Probabilistic forecasting of project performance using stochastic S curves AB - This study presents a new methodology for evaluating at-completion project performance status. This new procedure uses the concept of stochastic S curves (SS curves) to determine forecasted project estimates as an alternative to using deterministic S curves and traditional forecasting methods. A simulation approach is used for generating the stochastic S curves, and it is based on the defined variability in duration and cost of the individual activities within the process. Stochastic S curves provide probability distributions for the budget and time values required to complete the project at every selected point of intermediate completion. Final project performance is determined by comparing the planned budget and project duration, with the expected forecasted final cost and elapsed time, respectively. The SS-curve methodology permits objective evaluation of project performance without the limitations inherent in a deterministic approach. The probabilistic characteristics of this approach enable users to more accurately determine at-completion cost and duration variations and evaluate the performance improvement of proposed corrective actions MH - Mexico|Nuevo Leon MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 6 U4 - Construction & Building Technology;Engineering, Industrial;Engineering, Civil U5 - J;Article AV - English IS - 0733-9364 UR - ISI:000188736200003 L2 - project management;scheduling;Monte Carlo method;simulation;cost control;forecasting;performance evaluation SO - Journal of Construction Engineering and Management-Asce 2004 ;130(1):25-32 10141 UI - 3794 AU - Barrera-Figueroa S AU - Rasmussen K AU - Jacobsen F AU - Muniz L AD - Tech Univ Denmark, Orsted DTU, DK-2800 Lyngby, DenmarkCtr Nacl Metrol, Div Acust & Vibrac, Queretaro, MexicoBarrera-Figueroa, S, Tech Univ Denmark, Orsted DTU, Bldg 352, DK-2800 Lyngby, Denmark TI - On the interference between the two microphones in free-field reciprocity calibration AB - One of the fundamental assumptions in free-field reciprocity calibration of microphones is that the microphones can be substituted by point sources at the positions where the acoustic centers are located. However, in practice the microphones have finite dimensions and, at the distance and in the frequency range where the measurements are made, the direct wave and the subsequent reflections from the microphones interfere with each other, creating a "standing wave." This interference effect gives rise to deviations from the inverse distance law, indicating that the free-field assumption is not strictly valid. The interference has been thought to be caused by specular reflection between the parallel diaphragms of the microphones, and a solution based on tilting the axis of one of the microphones a few degrees has been proposed, but never examined in practice. In this paper a time-selective technique is applied for analyzing the interference and for removing it in the time domain. It is shown that the phenomenon is due to multiple backscattering rather than specular reflection. Thus tilting one of the microphones does not alleviate the problem, as also demonstrated experimentally. However, the time-selective technique is quite effective in removing the interference effect and other disturbances from the direct wave between the microphones. (C) 2004 Acoustical Society of America MH - Denmark MH - Mexico|Queretaro PB - MELVILLE: ACOUSTICAL SOC AMER AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Acoustics U5 - J;Article AV - English IS - 0001-4966 UR - ISI:000225331500007 L2 - CONDENSER MICROPHONES; STANDARD SO - Journal of the Acoustical Society of America 2004 ;116(5):2771-2778 10142 UI - 5138 AU - Barrera M AU - Cervantes M AU - Sauer WC AU - Araiza AB AU - Torrentera N AU - Cervantes M AD - Univ Autonoma Baja California, Inst Ciencias Agricolas, Mexicali 21100, Baja California, MexicoUniv Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, CanadaCervantes, M, POB 4913, Calexico, CA 92231, USA TI - Ileal amino acid digestibility and performance of growing pigs fed wheat-based diets supplemented with xylanase AB - Two experiments were conducted to determine the effect of supplementation of xylanase to a wheat-based diet on the apparent ileal digestibility (AID) of AA and the performance of growing pigs fed diets limiting in AA. In Exp. 1, eight pigs (average initial BW = 20.5 +/- 1.2 kg) fitted with a simple T-cannula at the distal ileum, were fed four diets according to a repeated 4 x 4 Latin square design. Diet 1 was a basal diet that contained 97.6% wheat. Diets 2, 3, and 4 were the basal diet supplemented with xylanase at rates of 5,500, 11,000, and 16,500 units of xylanase activity (XU), respectively (as-fed basis). There were linear and quadratic effects (0.062 < P < 0.001) of xylanase supplementation on the AID of CP and most of the AA. The largest increases in AID of CP and AA were obtained when xylanase was supplemented at a rate of 11,000 XU; no further increases were observed with xylanase supplementation at a rate of 16,500 XU. In Exp. 2, 30 pigs (average initial BW 21.4 +/- 1.8 kg) were randomly allotted to six dietary treatments. Diets 1 to 4 were similar to those used in Exp. 1. Diet 5 was the same as Diet 1, but supplemented with 0.53% lysine, 0.12% threonine, and 0.05% methionine. Diet 6 (positive control diet) was a wheat-soybean meal diet that contained 18.2% CP (as-fed basis). The total contents of lysine, threonine, and methionine were similar for Diets 5 and 6. There was a linear effect of xylanase supplementation on ADG (P = 0.093) and feed:gain ratio (P = 0.089), and a quadratic effect on ADG (P = 0.067) and feed:gain ratio (P = 0.074). But, the greatest response was obtained with the supplementation of 11,000 XU. The supplementation of lysine, threonine, and methionine to Diet 1 increased (P = 0.001) ADG and ADFI and improved (P = 0.01) feed:gain ratio. There was no difference (P = 0.508) in the performance of pigs fed the AA-supplemented or control diet. In conclusion, the supplementation of xylanase to a diet in which wheat provided the sole source of protein and energy improved the AID of AA, ADG, and feed:gain ratio; however, this improvement was very small compared with that obtained with the supplementation of synthetic amino acids MH - Canada MH - Mexico|Baja California MH - USA PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000222317500013 L2 - amino acids;ileal digestibility;pigs;wheat;xylanase;ENDOGENOUS NITROGEN LOSSES; ENZYME SUPPLEMENTATION; METABOLIZABLE ENERGY; PROTEIN; FIBER; NUTRITION; NUTRIENTS; INTESTINE; BENEFITS SO - Journal of Animal Science 2004 ;82(7):1997-2003 10143 UI - 3701 AU - Barrera MC AU - Viniegra M AU - Escobar J AU - Vrinat M AU - de los Reyes JA AU - Murrieta F AU - Garcia J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Area Ing Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoInst Rech Catalyse, CNRS, F-69626 Villeurbanne, FranceViniegra, M, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, San Rafael Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Highly active MoS2 on wide-pore ZrO2-TiO2 mixed oxides AB - Wide-pore ZrO2-TiO2 (Zr/Ti = 30/70) was prepared by low-temperature (273 K) sol-gel technique followed by solvo-treatment. Higher surface area (S-g similar to 340 m(2) g(-1)) and porosity (V-p similar to 0.8 cm(3) g(-1)) were registered after solvo-treatment at 353 K (1 day) for samples calcined at 773 K. Wider pores (similar to22 nm) but much lower Sg (similar to80 m(2) g(-1))were observed when solvo-treatment was carried out at 513 K. Even larger pores with almost no additional Sg decrease were obtained by prolonging that stage. MoS2 catalysts supported on binary oxides solvo-treated at 353 K showed increased intrinsic activity (by a factor of similar to3.3) in dibenzothiophene hydrodesulfurization (593 K and 5.6 MPa), as to that impregnated on conventional ZrO2-TiO2 (at 2.8 Mo atoms nm(-2)). By itself, Mo sulfidability (as determined by XPS) seemed not to dictate the activity trends found. Surface Lewis acidity appeared to play a decisive role on HDS performance, probably by influencing both Mo sulfidability and dispersion. Highly-loaded catalysts (5.6 Mo atoms nm(-2)) had decreased activity, probably due to lower MoS2 dispersion. Additional characterization comprised chemical analysis (ICP), XRD, thermal analysis, acidity measurements (by pyridine FTIR) and UV-vis DRS. Tailoring ZrO2-TiO2 texture, traditionally characterized by narrow micro-mesoporosity results promising in developing novel hydrotreating catalyst supports. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000225613500016 L2 - zirconia-titania;sol-gel;solvo-thermal treatment;hydrodesulfurization;MOLYBDENUM SULFIDE CATALYSTS; HIGH-SURFACE-AREA; HYDROTREATING CATALYSTS; TITANIUM-DIOXIDE; ZIRCONIA-TITANIA; HYDRODESULFURIZATION; TEMPERATURE; SUPPORT; ALUMINA; HYDRODENITROGENATION SO - Catalysis Today 2004 ;98(1-2):131-139 10144 UI - 4223 AU - Barrientos B AU - Martinez-Celorio RA AU - Lopez LM AU - Dirckx JJJ AU - Cywiak M AD - Univ Guanajuato, Fac Ingn Mecan Elect & Elect, Guanajuato, MexicoCtr Inves Opt, Leon, Gto, MexicoCtr Neurociencias Cuba, Havana, CubaLab Biomed Phys, B-2020 Antwerp, BelgiumMartinez-Celorio, RA, Univ Guanajuato, Fac Ingn Mecan Elect & Elect, CP 36730, Guanajuato, Mexico TI - Measurement of out-of-plane deformation by combination of speckle photography and speckle shearing interferometry AB - We measure the derivative of out-of-plane deformation in presence of large in-plane rigid body displacement (RBD) by a combination of Electronic Speckle-Shearing Pattern Interferometry (ESSPI) and speckle photography. We use digital speckle photography in order to compensate for the in-plane RBD and eliminate any decorrelation effects. ESSPI techniques are then applied to the compensated speckle images to obtain the derivative of the out-of-plane deformation. The method is tested on an aluminum plate subjected to simultaneous out-of-plane deformation and large in-plane RBD. The results indicate that the proposed method preserves the fringe contrast observed in ESSPI MH - Belgium MH - Cuba MH - Mexico|Guanajuato PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0030-4026 UR - ISI:000224204500002 L2 - speckle photography;speckle interferometry;carrier-fringe method;PATTERN INTERFEROMETRY; DISPLACEMENT MEASUREMENT; PHASE SO - Optik 2004 ;115(6):248-252 10145 UI - 3649 AU - Barrientos H AU - Arias E AU - Moggio I AU - Romero J AU - Rodriguez O AU - Giorgetti E AU - Del Russo T AD - Ist Fis Applicata Nello Carrara, I-50127 Florence, ItalyCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoGiorgetti, E, Ist Fis Applicata Nello Carrara, Via Panciatichi 64, I-50127 Florence, Italy TI - Dodecanoxy-phenylethynylene oligomers for light emitting diodes AB - A family of rigid rod-like phenylethynylene oligomers and the homologue polymer were characterized by X-ray diffraction, DSC, UV-Vis and fluorescence spectroscopy. the pentamer as well as the heptamer exhibit liquid crystal properties characterized by a strong birefringence as observed by polarized microscopy, by DSC and by the X-ray diffraction pattern, where a lamellar ordered phase with layer spacing of 2.6 nm was determined by Bragg's equation. The optical ab sorption and emission spectra in CHCl3 showed that the conjugation increases with the oligomer length and the limit value is reached for the polymer, although a close saturation of the pi-pi conjugation is almost obtained for the heptamer. In a preliminary study, diodes were fabricated by spin coating thin films of pentamer and polymer on ITO electrodes and threshold voltage around 4 V and yielding close to 10(-6). These results are interesting in view of a further study of the optoelectronic properties of the whole family of oligomers. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Coahuila PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter;Polymer Science U5 - J;Article AV - English IS - 0379-6779 UR - ISI:000225662000047 L2 - oligomers;conjugation;phenylethynylene;electroluminescence;PHENYLENE-ETHYNYLENE OLIGOMERS; POLYMERS; EMISSION; FILMS SO - Synthetic Metals 2004 ;147(1-3):267-270 10146 UI - 4886 AU - Barrientos LF AU - Schade D AU - Lopez-Cruz O AU - Quintana H AD - Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, ChileNatl Res Council Canada, Herzberg Inst Astrophys, Ottawa, ON K1A 0R6, CanadaINAOE, Mexico City, DF, MexicoBarrientos, LF, Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Ave Vicuna Mackenna 4860,Casilla 306, Santiago 22, Chile TI - Photometric and morphological properties of nearby cluster galaxies AB - Photometric observations are presented for 8747 galaxies in the fields of 28 clusters with redshifts in the range 0.05 < z < 0.11 and spanning a wide range in Abell richness class. The primary motivation for this study is to provide a nearby sample of clusters whose galaxy populations can be used to provide an anchor point for evolutionary studies of cluster galaxy populations. The present analysis focuses on the sequence of luminous red galaxies that form a tight correlation in the color-magnitude plane. An ensemble cluster constructed from the full sample shows the red sequence clearly and the observed dispersion-not corrected for observational errors-is sigma(V-I) = 0.071 +/- 0: 006 down to M-I(AB) = -19.5. Selecting only early-type galaxies on the basis of their fractional bulge luminosity (B/T) reduces the observed dispersion to sigma(V-I) = 0.050 +/- 0.006 mag, a significantly smaller dispersion than the full sample at more than the 95% confidence level. The slope of the color-magnitude relation in (V-I)/I is -0.023 +/- 0.006. This set of clusters shows a red sequence that has the same mean color in all clusters (V-I)(AB) = 0.91 +/- 0.03 (measured at MI(AB) = -23) and has the same intrinsic dispersion, delta(V-I) 0.04 +/- 0.01, in all clusters within the observational errors. Thus, these clusters form a remarkably homogeneous family as represented by their luminous red galaxy populations MH - Canada MH - Chile MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000222850300001 L2 - galaxies : clusters : general;galaxies : photometry;galaxies : structure;COLOR-MAGNITUDE RELATION; PRECISION PHOTOMETRY; ELLIPTIC GALAXIES; DISTANT CLUSTERS; STANDARD STARS; VIRGO CLUSTERS; EVOLUTION; COMA; UNIVERSALITY; POPULATIONS SO - Astrophysical Journal Supplement Series 2004 ;153(2):397-409 10147 UI - 3055 AU - Barroso G AU - Felix H AU - Garcia-Leon F AU - Cruz V AU - Ibarrola E AU - Oehninger S AD - Clin Lomas Altas, Mexico City, DF, MexicoAmer British Cowdray Med Ctr, Mexico City, DF, MexicoEastern Virginia Med Sch, Jones Inst Reprod Med, Norfolk, VA 23501, USA TI - Preliminary experience comparing the efficiency of inhibitors of aromatase (Letrozole (TM)) and clomiphene citrate (Serophene (TM)) in controlled ovarian stimulation (COH) in a prospective clinical trial MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000224010800084 SO - Fertility and Sterility 2004 ;82():S33-S33 10148 UI - 6450 AU - Bartell PA AU - Miranda-Anaya M AU - Menaker M AD - Max Planck Gesell, Forschungsstelle Onrithol, D-82346 Erling Andechs, GermanyUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Celular, Mexico City 04510, DF, MexicoUniv Virginia, Dept Biol, Charlottesville, VA, USAUniv Virginia, Natl Sci Fdn, Ctr Biol Timing, Charlottesville, VA, USABartell, PA, Max Planck Gesell, Forschungsstelle Onrithol, Von Tann Str 7, D-82346 Erling Andechs, Germany TI - Period and phase control in a multioscillatory circadian system (Iguana iguana) AB - The circadian system of the lizard Iguana iguana is composed of several independent pacemakers that work in concert: the pineal gland, retinae of the lateral eyes, and a fourth oscillator presumed to be located in the hypothalamus. These pacemakers govern the circadian expression of multiple behaviors and physiological processes, including rhythms in locomotor activity, endogenous body temperature, electroretinogram, and melatonin synthesis. The numerous, easily measurable rhythmic outputs make the iguana an ideal organism for examining the contributions of individual oscillators and their interactions in governing the expression of overt circadian rhythms. The authors have examined the effects of pinealectomy and enucleation on the endogenous body temperature rhythm (BTR) and locomotor activity rhythm (LAR) of juvenile iguanas at constant temperature both in LD cycles and in constant darkness (DID). They measured the periods (tau) of the circadian rhythms of LAR and BTR, the phase relationships between them in DID (Psi(AT)), and the phase relationship between each rhythm and the light cycle (Psi(RL)). Pinealectomy lengthened tau of locomotor activity in all animals tested and abolished the BTR in two-thirds of the animals. In those animals in which the BTR did persist following pinealectomy tau lengthened to the same extent as that of locomotor activity. Pinealectomy also delayed the onset of activity with respect to its normal phase relationship with body temperature in DD. Enucleation alone had no significant effect on tau of LAR or BTR; however, after enucleation, BTR became 180 degrees out of phase from LAR in DID. After both pinealectomy and enucleation, 4 of 16 animals became arrhythmic in both activity and body temperature. Their data suggest that rhythmicity, period, and phase of overt circadian behaviors are regulated through the combined output of multiple endogenous circadian oscillators MH - Germany MH - Mexico|Distrito Federal MH - USA PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Biology;Physiology U5 - J;Article AV - English IS - 0748-7304 UR - ISI:000188248400005 L2 - circadian organization;pineal gland;eyes;body temperature;locomotor activity;iguana;HYPOTHALAMIC SUPRACHIASMATIC NUCLEI; LOCOMOTOR-ACTIVITY RHYTHMS; LIZARD PODARCIS-SICULA; PINEAL ORGAN; RUIN LIZARD; PINEALECTOMIZED LIZARDS; EUROPEAN STARLINGS; DESERT IGUANA; MELATONIN; ORGANIZATION SO - Journal of Biological Rhythms 2004 ;19(1):47-57 10149 UI - 3042 AU - Bartsch DUG AU - Gomez L AU - Bessho K AD - UCSD Shiley Eye Ctr, La Jolla, CA, USACodet Eye Clin, Tijuana, Mexico TI - Comparison of 4 different wavefront analyzers in a model eye with different, known waveplates MH - Mexico|Baja California MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338200044 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U19-U19 10150 UI - 5791 AU - Baruah T AU - Pederson MR AU - Zope RR AU - Beltran MR AD - Georgetown Univ, Dept Phys, Washington, DC 20057, USAUSN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375, USAGeorge Mason Univ, Sch Computat Sci, Fairfax, VA 22030, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoBaruah, T, Georgetown Univ, Dept Phys, Washington, DC 20057, USA TI - Stability of As-n [n=4, 8, 20, 28, 32, 36, 60] cage structures AB - We present all-electron density functional study of the geometry, electronic structure, vibrational modes, polarizabilities as well Lis the infrared and Raman spectra of fullerene-like arsenic cages. The stability of As-n cages for sizes 4, 8, 20, 28, 32, 36, and 60 wherein each As atom is threefold coordinated is examined. We find that all the cages studied are vibrationally stable and while all the clusters are energetically stable with respect to isolated arsenic atoms, only As-20 is energetically stable against dissociation into As-4. We Suggest that the Raman spectra might be a means for observing the As-20 molecule in gas phase. Published by Elsevier B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000220620200049 L2 - RAMAN-SCATTERING; CLUSTERS; PHOSPHORUS; APPROXIMATION; SIMULATIONS; FULLERENE; SYSTEMS; C-60 SO - Chemical Physics Letters 2004 ;387(4-6):476-480 10151 UI - 4348 AU - Baruch I AU - Genina-Soto P AU - Nenkova B AU - Barrera-Cortes J AD - CINVESTAV, IPN, Dept Automat Control, Mexico City 07360, DF, MexicoCINVESTAV, IPN, Dept Biotechnol & Bioengn, Mexico City 07360, DF, MexicoIIT, BAS, Sofia 1113, BulgariaBaruch, I, CINVESTAV, IPN, Dept Automat Control, Av IPN 2508,AP 14-740, Mexico City 07360, DF, Mexico TI - Neural model of osmotic dehydration kinetics of fruits cubes AB - The paper proposed to use a Recurrent Neural Network model (RNN) for process prediction of the osmotic dehydration kinetics of nature product cubes (apple, sweet potatoes and potatoes) at different operational conditions of temperature and concentration of the osmotic solution. The proposed RNN model has five inputs, three outputs and eight neurons in the hidden layer, with global and local feedbacks. The learning algorithm is a modified version of the dynamic backpropagation one. The learning and generalization mean squared errors are below 2%. The learning was performed in 701 epochs, 40 iterations each one. The statistical analysis confirms the good quality of the proposed RNN model MH - Bulgaria MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000223825100032 L2 - POTATO; MEDIA SO - Artificial Intelligence: Methodology, Systems, and Applications, Proceedings 2004 ;3192():312-320 10152 UI - 4278 AU - Basaran N AU - Quintero-Ramos A AU - Moake MM AU - Churey JJ AU - Worobo RW AD - Cornell Univ, New York State Agr Expt Stn, Dept Food Sci & Technol, Geneva, NY 14456, USAUniv Autonoma Chihuahua, Fac Ciencias Quim, Chihuahua, MexicoWorobo, RW, Cornell Univ, New York State Agr Expt Stn, Dept Food Sci & Technol, Geneva, NY 14456 USA TI - Influence of apple cultivars on inactivation of different strains of a Escherichia coli O157 : H7 in apple cider by UV irradiation AB - This study examined the effect of different apple cultivars upon the UV inactivation of Escherichia coli O157:H7 strains within unfiltered apple cider. Apple cider was prepared from eight different apple cultivars, inoculated with approximately 10(6) to 10(7) CFU of three strains of E. coli O157:H7 per ml (933, ATCC 43889, and ATCC 43895), and exposed to 14 mJ of UV irradiation per cm(2). Bacterial populations for treated and untreated samples were then enumerated by using nonselective media. E. coli O157:H7 ATCC 43889 showed the most sensitivity to this disinfection process with an average 6.63-log reduction compared to an average log reduction of 5.93 for both strains 933 and ATCC 43895. The highest log reduction seen, 7.19, occurred for strain ATCC 43889 in Rome cider. The same cider produced the lowest log reductions: 5.33 and 5.25 for strains 933 and ATCC 43895, respectively. Among the apple cultivars, an average log reduction range of 5.78 (Red Delicious) to 6.74 (Empire) was observed, with two statistically significant (alpha less than or equal to 0.05) log reduction groups represented. Within the paired cultivar-strain analysis, five of eight ciders showed statistically significant (alpha less than or equal to 0.05) differences in at least two of the E. coli strains used. Comparison of log reductions among the E. coli strains to the cider parameters of degreesBrix, pH, and malic acid content failed to show any statistically significant relationship (R-2 greater than or equal to 0.95). However, the results of this study indicate that regardless of the apple cultivar used, a minimum 5-log reduction is achieved for all of the strains of E. coli O157:H7 tested MH - Mexico|Chihuahua MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000224356200046 L2 - HEMOLYTIC-UREMIC SYNDROME; ACID; OUTBREAK; INFECTIONS; JUICE; SURVIVAL; FRESH; CONSUMPTION; PH; EPIDEMIOLOGY SO - Applied and Environmental Microbiology 2004 ;70(10):6061-6065 10153 UI - 2268 AU - Baselga J AU - Carbonell X AU - Caslaneda-Soto NJ AU - Clemens M AU - Green M AU - Harvey V AU - Morales S AU - Barton C AD - Hosp Val Hebron, Barcelona, SpainInst Nacl Cancerol, Tlalpan, MexicoMutterhaus Borromaeerinnen, Trier, GermanyRoyal Melbourne Hosp, Melbourne, Vic, AustraliaAuckland Hosp, Auckland, New ZealandHosp Arnau Vilanova, Lleida, SpainRoche Prod Ltd, Welwyn Garden City AL7 3AY, Herts, England TI - Updated efficacy and safety analyses of 3-weekly Herceptin (R) monotherapy in women with HER2-positive metastatic breast cancer: results from twelve months of follow-up to a phase II study MH - Australia MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - New Zealand MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 0167-6806 UR - ISI:000225589600356 SO - Breast Cancer Research and Treatment 2004 ;88():S126-S126 10154 UI - 4814 AU - Bashir A AU - Delbourgo R AD - Univ Michoacan San Nicolas Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Tasmania, Sch Math & Phys, Hobart, Tas 7001, AustraliaBashir, A, Univ Michoacan San Nicolas Hidalgo, Inst Fis & Matemat, Apartado Postal 2-82, Morelia 58040, Michoacan, Mexico TI - The nonperturbative propagator and vertex in massless quenched QED(d) AB - It is well known how multiplicative renormalizability of the fermion propagator, through its Schwinger-Dyson equation, imposes restrictions on the 3-point fermion-boson vertex in massless quenched quantum electrodynamics in four dimensions. Moreover, perturbation theory serves as an excellent guide for possible nonperturbative constructions of Green functions. We extend these ideas to arbitrary dimensions d. The constraint of multiplicative renormalizability of the fermion propagator is generalized to a Landau-Khalatnikov-Fradkin transformation law in d dimensions and it naturally leads to a constraint on the fermion-boson vertex. We verify that this constraint is satisfied in perturbation theory at the one-loop level in three dimensions. Based upon one-loop perturbative calculation of the vertex, we find additional restrictions on its possible nonperturbative forms in arbitrary dimensions MH - Australia MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000223016800014 L2 - SCHWINGER-DYSON EQUATIONS; QUANTUM ELECTRODYNAMICS; FERMION PROPAGATOR; MULTIPLICATIVE RENORMALIZABILITY; ANOMALOUS DIMENSIONS; 3-POINT VERTEX; GAUGE-THEORIES; WARD IDENTITY SO - Journal of Physics A-Mathematical and General 2004 ;37(25):6587-6597 10155 UI - 5102 AU - Basilakos S AU - Plionis M AU - Georgakakis A AU - Georgantopoulos I AU - Gaga T AU - Kolokotronis V AU - Stewart GC AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceINAOE, Puebla 72000, MexicoUniv Athens, Dept Phys, Athens, GreeceUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandBasilakos, S, Natl Observ Athens, Inst Astron & Astrophys, I Metaxa & B Pavlou, Athens 15236, Greece TI - The XMM-Newton/2dF survey - III. Comparison between optical and X-ray cluster detection methods AB - We directly compare X-ray and optical techniques of cluster detection by combining Sloan Digital Sky Survey photometric data with a wide-field (similar to1.6 deg(2)) XMM-Newton survey near the North Galactic Pole region. The optical cluster detection procedure is based on merging two independent selection methods: a smoothing + percolation technique and a matched filter algorithm. The X-ray cluster detection is based on a wavelet-based algorithm, incorporated in the Science Analysis System (SAS) v.5.3 package. The final optical sample counts nine candidate clusters with estimated Automatic Plate Measuring like richness of more than 20 galaxies, while the X-ray based cluster candidates total four. Three out of these four X-ray cluster candidates are also optically detected. We argue that the cause is that the majority of the optically detected clusters are relatively poor X-ray emitters, with X-ray fluxes fainter than the flux limit (for extended sources) of our survey, f(x) (0.3-2 keV) similar or equal to 2 x 10(-14) erg cm(-2) s(-1) MH - United Kingdom MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000222261500024 L2 - galaxies : clusters : general;cosmology : observations;cosmology : large-scale structure of Universe;DIGITAL SKY SURVEY; LARGE-SCALE STRUCTURE; GALAXY CLUSTERS; LUMINOSITY FUNCTION; RICH CLUSTERS; CATALOG; EVOLUTION; SUBSTRUCTURE; UNIVERSE; SAMPLE SO - Monthly Notices of the Royal Astronomical Society 2004 ;351(3):989-996 10156 UI - 5476 AU - Basilakos S AU - Georgakakis A AU - Plionis M AU - Georgantopoulos I AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoBasilakos, S, Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, Greece TI - The clustering of XMM-Newton hard X-ray sources AB - This Letter presents the clustering properties of hard (2-8 keV) X-ray-selected sources detected in a wide-field (approximate to2 deg(2)), shallow [f(X) (2-8 keV) approximate to 10(-14) ergs cm(-2) s(-1)], and contiguous XMM- Newton survey. We perform an angular correlation function analysis using a total of 171 sources to the above flux limit. We detect an similar to4 sigma correlation signal out to 300" with w(theta < 300&DPRIME;) &SIME; 0.13 &PLUSMN; 0.03. Modeling the two- point correlation function as a power law of the form w(θ) = (θ(0)/θ)(γ-1), we find θ0 = 48.9(-24.5)(+15.8) arcsec and gamma = 2.2 +/- 0.30. Fixing the correlation function slope to gamma = 1.8, we obtain theta0 = 22.2(-8.6)(+9.4) arcsec. Using Limber's integral equation and a variety of possible luminosity functions of the hard X- ray population, we find a relatively large correlation length, ranging from r(0) similar to 9 to 19 h(-1) Mpc (for gamma = 1.8 and the concordance cosmological model), with this range reflecting also different evolutionary models for the source luminosities and clustering characteristics. The relatively large correlation length is comparable to that of extremely red objects and luminous radio sources MH - Greece MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000221540200004 L2 - cosmology : observations;galaxies : active;large-scale structure of universe;quasars : general;surveys;X-rays : diffuse background;GALAXY REDSHIFT SURVEY; CHANDRA DEEP FIELD; DIGITAL SKY SURVEY; XMM-NEWTON/2DF SURVEY; ANGULAR-CORRELATION; LUMINOSITY FUNCTION; RADIO-SOURCES; EVOLUTION; CATALOG SO - Astrophysical Journal 2004 ;607(2):L79-L82 10157 UI - 5721 AU - Basilakos S AU - Plionis M AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceINAOE, Puebla 72000, MexicoBasilakos, S, Natl Observ Athens, Inst Astron & Astrophys, 1 Metaxa & V Pavlou,Palaia Penteli, Athens 15236, Greece TI - Modelling the two-point correlation function of galaxy clusters in the Sloan Digital Sky Survey AB - We study the clustering properties of the recently compiled Sloan Digital Sky Survey (SDSS) cluster catalogue using the two-point correlation function in redshift space. We divide the total SDSS sample into two richness subsamples, roughly corresponding to Abell R greater than or equal to 0 and Automated Plate Measuring (APM) clusters, respectively. If the two-point correlations are modelled as a power law, xi(r) = (r(0)/r)(gamma), then the best-fitting parameters for the two subsamples are r(0) = 20.7(-3.8)(+4.0) h(-1) Mpc with gamma = 1.6(-0.4)(+0.4) and r(0) = 9.7(-1.2)(+1.2) with gamma = 2.0(-0.5)(+0.7) h(-1) Mpc, respectively. Our results are consistent with the dependence of cluster richness on the cluster correlation length. Finally, comparing the SDSS cluster correlation function with predictions from three flat cosmological models (Omega(m) = 0.3) with dark energy (quintessence), we estimate the cluster redshift-space distortion parameter beta similar or equal to Omega(m)(0.6)/b(0) and the cluster bias at the present time. For the Lambda cold dark matter case we find beta = 0.2(-0.16)(+0.029), which is in agreement with the results based on large-scale cluster motions MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000220847700012 L2 - galaxies : clusters : general;cosmology : theory;large-scale structure of Universe;SPATIAL CORRELATION-FUNCTION; X-RAY-CLUSTERS; ABELL CLUSTERS; RICH CLUSTERS; COSMOLOGICAL PARAMETERS; VELOCITY-FIELDS; POWER SPECTRUM; BIAS; CONSTRAINTS; CONSTANT SO - Monthly Notices of the Royal Astronomical Society 2004 ;349(3):882-888 10158 UI - 5194 AU - Basiuk VA AU - Kobayashi Y AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYokohama Natl Univ, Fac Engn, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa 2408501, JapanBasiuk, VA, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Circuito Exterior C-U-A Postal 70-543, Mexico City 04510, DF, Mexico TI - DFT study of HCN and N C-C N reactions with hydrogen species AB - Energetic feasibility of the formation of aminoacetonitrile (or glycine nitrile) through a sequence of reactions of cyanogen (NdropC-Cdrop N) with hydrogen species was evaluated, using density functional theory (DFT) calculations at the B3LYP/6-31 + +G(d,p) theoretical level. A critical step in the cyanogen hydrogenation is the addition of first H atom. As a result of a positive activation barrier of similar to3-6 kcal mol(-1) (depending on the attachment site), this process is hardly feasible under cold gas-phase interstellar conditions, but might possibly be facilitated in the solid phase by proton tunneling effects. The addition of a third hydrogen atom requires much lower activation energy, especially if H adds on the NH group (0.2-0.8 kcal mol(-1)). The second and fourth steps (combination of C2HN2 and C2H3N2 radical species with hydrogen atoms) are highly exothermic; the need to get rid of excess energy makes them possible through grain-surface processes only. As a whole, most of the hydrogenation reactions under study can be expected to take place in the solid phase (icy and silicate grains), and not in the gas phase under cold interstellar conditions. (C) 2004 Wiley Periodicals, Inc MH - Japan MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000222142300004 L2 - cyanogen;glycine nitrile;interstellar;DFT;B3LYP;radical reactions;CROSSED-BEAM REACTION; NEUTRAL-NEUTRAL REACTIONS; INTERSTELLAR-MEDIUM; CORRELATION-ENERGY; CYANO RADICALS; DISSOCIATIVE RECOMBINATION; SPECTROSCOPIC PROPERTIES; HYDROCARBON MOLECULES; CHEMICAL-DYNAMICS; AMINO-ACIDS SO - International Journal of Quantum Chemistry 2004 ;99(2):92-101 10159 UI - 3726 AU - Bastos MA AU - Karlovich YI AU - Silbermann B AD - Inst Super Tecn, P-1049001 Lisbon, PortugalTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoBastos, MA, Inst Super Tecn, Av Rovisco Pais, P-1049001 Lisbon, Portugal TI - Toeplitz operators with symbols generated by slowly oscillating and semi-almost periodic matrix functions MH - Germany MH - Mexico|Morelos MH - Portugal PB - LONDON: LONDON MATH SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0024-6115 UR - ISI:000225501500006 L2 - HARDY-SPACES SO - Proceedings of the London Mathematical Society 2004 ;89():697-737 10160 UI - 5180 AU - Bastos MA AU - Bravo A AU - Karlovich Y AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoInst Super Tecn, Dept Matemat, P-1049001 Lisbon, PortugalBastos, MA, Univ Autonoma Estado Morelos, Fac Ciencias, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Symbol calculus and Fredholmness for a Banach algebra of convolution type operators with slowly oscillating and piecewise continuous data AB - A symbol calculus for the smallest Banach subalgebra A([SO,PC]) of the Banach algebra B(L-p(n)(R)) of all bounded linear operators on the Lebesgue spaces L-p(n)(R) (1 < p < infinity, n greater than or equal to 1) which contains all the convolution type operators W-a,W-b = aF(-1)bF with a is an element of [SO, PC](n x n) and b is an element of [SOp, PCp](n x n) is constructed. Here [SO, PC](n x n) means the C*-algebra generated by all slowly oscillating (SO) and all piecewise continuous (PC) n x n matrix functions, and [SOp, PCp](n x n) is a Fourier multiplier analogue of [SO, PC](n x n) on L-p (R). As a result, a Fredholm criterion for the operators A is an element of A([SO, PC]) is established. The study is based on the compactness of the commutators AW(a,b) - W(a,b)A where A is an element of A([SO, PC]), a is an element of SO, and b is an element of SOp, on the Allan-Douglas local principle, and on the two projections theorem. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Mexico|Morelos MH - Portugal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000222112800002 L2 - convolution type operators;slowly oscillating matrix;local principle;two projections theorem;Banach algebra;symbol calculus;Fredholmness;TOEPLITZ-OPERATORS; LP-SPACES; COEFFICIENTS; THEOREMS SO - Mathematische Nachrichten 2004 ;269-70():11-38 10161 UI - 6008 AU - Batina N AU - Renugopatakrishnan V AU - Lavin PNC AU - Guerrero JCH AU - Morales M AU - Garduno-Juarez R AU - Lakka SL AD - Harvard Univ, Childrens Hosp, Sch Med, Boston, MA 02115, USAUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoFlorida Int Univ, Dept Biomed Engn, Miami, FL 33174, USAUniv Nacl Autonoma Mexico, Fac Odontol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoRenugopatakrishnan, V, Harvard Univ, Childrens Hosp, Sch Med, Boston, MA 02115 USA TI - Ultrastructure of dental enamel afflicted with hypoplasia: An atomic force microscopic study AB - The ultrastructure of the human tooth enamel from a patient diagnosed with hypoplasia (HYP) was investigated using atomic force microscopy (AFM) and compared with the surface of normal human tooth enamel. Hypoplasia is a hereditary defect of dental enamel in which the enamel is deficient in either quality or quantity. AFM results presented for the HYP tooth enamel clearly demonstrate that the apatite crystal morphology in hypoplasia tooth enamel is perturbed in the diseased state which could result from a defective synthesis of the extracellular matrix proteins, e.g., amelogenin, by the ameloblasts. HYP enamel consisting of loosely packed, very small grains does not present a tendency for association, as in the case of the normal healthy tooth. Indeed, the enamel surface affected by HYP is porous and is made of much smaller grains. In some samples, the HYP part of enamel surface appeared in the form of a point-defect, which we believe may be associated with the early stages of the HYP deformation MH - USA MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0171-967X UR - ISI:000220252700010 L2 - hypoplasia;atomic force microscopy;tooth enamel surface;surface morphology of tooth enamel;ultrastructure;LINKED AMELOGENESIS IMPERFECTA; BOVINE TOOTH ENAMEL; GLASSY-CARBON; DEFECTS; GENE SO - Calcified Tissue International 2004 ;74(3):294-301 10162 UI - 5928 AU - Batista CVF AU - del Pozo L AU - Zamudio FZ AU - Contreras S AU - Becerril B AU - Wanke E AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoUniv Milan, Dipartimento Biotecnol & Biosci, I-20126 Milan, ItalyPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Ave Univ 2001,Apardado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Proteomics of the venom from the Amazonian scorpion Tityus cambridgei and the role of prolines on mass spectrometry analysis of toxins AB - Scorpion venom are complex mixtures of peptides, known to cause impairment of ion-channel function in biological membranes. This report describes the separation of approximately 60 different components by high performance liquid chromatography and the characterization by Edman degradation and mass spectrometry of 26 peptides from the soluble venom of the Amazonian scorpion Tityus cambridgei. One of these peptides, named Tc48a, was fully characterized. It contains 65 amino acid residues, the C-terminal residue is amidated and it affects Na+-channels with a K-d of about 82 nM. Furthermore, this report shows the thermo-instability of scorpion toxins subjected to electron spray ionization-mass spectrometry (ESI-MS). When a proline residue is located near the N-terminal region of the toxin, not stabilized by disulfide bridges, artificial components are generated by the mass spectrometer conditions, due to the cleavage of the peptide bond at the proline positions. This phenomenon was confirmed by using four model proteins (variable regions of immunoglobulins) studied by ESI-MS and matrix assisted laser desorption ionization-time of flight (MALDI-TOF)/MS. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1570-0232 UR - ISI:000220343500006 L2 - proteomics;Tityus cambridgei;toxins;proline;COLLISION-INDUCED DISSOCIATION; PROTONATED PEPTIDES; NA+-CHANNELS; IONS; PROTEIN; IDENTIFICATION; GLYCOPROTEINS; FRAGMENTATION; ACTIVATION; MECHANISM SO - Journal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences 2004 ;803(1):55-66 10163 UI - 4303 AU - Batle J AU - Casas M AU - Fortes M AU - de Llano M AU - Sevilla FJ AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexicode Llano, M, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - High T-c's from BCS and BEC unification AB - Without abandoning the electron-phonon mechanism, relatively large superconducting transition temperatures T, are herewith shown to result in 2D from a recent unification of BCS theory with that of Bose-Einstein condensation (BEC) in terms of the "complete boson-fermion (BF) model" that allows departing from the perfect electron- and hole-pair symmetry of the BCS condensate. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000224051700109 L2 - BOSON-FERMION MODEL; COOPER PAIRS; SUPERCONDUCTIVITY SO - Physica C-Superconductivity and Its Applications 2004 ;408-10():257-258 10164 UI - 5415 AU - Batyrshin I AU - Shajdullina N AU - Sheremetov L AD - Inst Mexicano Petr, Mexico City 07730, DF, Mexico. Kazan State Technol Univ, Kazan, Russia TI - Strict valued preference relations and choice functions in decision-making procedures AB - Fuzzy (valued) preference relations (FPR) give possibility to take into account the intensity of preference between alternatives. The refinement of crisp (non-valued) preference relations by replacing them with valued preference relations often transforms crisp preference relations with cycles into acyclic FPR. It gives possibility to make decisions in situations when crisp models do not work. Different models of rationality of strict FPR defined by the levels of transitivity or acyclicity of these relations are considered. The choice of the best alternatives based on given strict FPR is defined by a fuzzy choice function (FCF) ordering alternatives in given subset of alternatives. The relationships between rationality of strict FPR and rationality of FCF are studied. Several valued generalizations of crisp group decision-making procedures are proposed. As shown on examples of group decision-making in multiagent systems, taking into account the preference values gives possibility to avoid some problems typical for crisp procedures MH - Mexico|Distrito Federal MH - Russia T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlebatyr@imp.mx batyr1@hotbox.ru sher@imp.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600034 SO - 2004 ;():332-341 10165 UI - 6570 AU - Batyrshin I AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoAcad Sci Tatarstan, Inst Problems Informat, Tatarstan, RussiaBatyrshin, I, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - On linguistic representation of quantitative dependencies AB - A description of quantitative dependencies by a novel type of fuzzy rules like 'If X is SMALL then Y is QUICKLY INCREASING' is considered. The use of such rules for representation of perception based and numerical information about dependencies between variables is discussed. These rules are based on a granulation of directions of function change or slope values. Perception based information given by rules is represented by a fuzzy function Y(X). A method of solution of a fuzzy equation Y(X) = B is considered. A linguistic representation of given numerical information about dependencies between variables X and Y is based on a fuzzy partition of the domain of X on fuzzy intervals, on a linear approximations of data on these intervals and on a linguistic retranslation of results. A genetic algorithm is used for obtaining fuzzy partitions. In conclusion, the possible applications of proposed methods in petroleum industry are discussed. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic;Operations Research & Management Science U5 - J;Article AV - English IS - 0957-4174 UR - ISI:000187780200011 L2 - fuzzy relation;granular model;soft computing;computing with words;FUZZY DIFFERENTIAL-EQUATIONS SO - Expert Systems with Applications 2004 ;26(1):95-104 10166 UI - 5177 AU - Baugh CM AU - Croton DJ AU - Gaztanaga E AU - Norberg P AU - Colless M AU - Baldry IK AU - Bland-Hawthorn J AU - Bridges T AU - Cannon R AU - Cole S AU - Collins C AU - Couch W AU - Dalton G AU - De Propris R AU - Driver SP AU - Efstathiou G AU - Ellis RS AU - Frenk CS AU - Glazebrook K AU - Jackson C AU - Lahav O AU - Lewis I AU - Lumsden S AU - Maddox S AU - Madgwick D AU - Peacock JA AU - Peterson BA AU - Sutherland W AU - Taylor K AD - Univ Durham, Dept Phys, Durham DH1 3LE, EnglandMax Planck Inst Astrophys, D-85740 Garching, GermanyINAOE, Puebla 7200, MexicoCSIC, ICE, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, SpainETH Honggerberg, ETHZ Inst Aston, CH-8093 Zurich, SwitzerlandAnglo Australian Observ, Epping, NSW 2111, AustraliaJohns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21118, USAQueens Univ, Dept Phys, Kingston, ON K7L 3N6, CanadaLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead L14 1LD, Merseyside, EnglandUniv New S Wales, Dept Astrophys, Sydney, NSW 2052, AustraliaUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandRutherford Appleton Lab, Space Sci & Technol Div, Didcot OX11 0QX, Oxon, EnglandAustralian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandCALTECH, Dept Astron, Pasadena, CA 91025, USACSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Leeds, Dept Phys, Leeds LS2 9JT, W Yorkshire, EnglandUniv Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, EnglandUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandBaugh, CM, Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, England TI - The 2dF Galaxy Redshift Survey: hierarchical galaxy clustering AB - We use the Two-Degree Field Galaxy Redshift Survey (2dFGRS) to test the hierarchical scaling hypothesis: namely, that the p-point galaxy correlation functions can be written in terms of the two-point correlation function or variance. This scaling is expected if an initially Gaussian distribution of density fluctuations evolves under the action of gravitational instability. We measure the volume-averaged p-point correlation functions using a counts-in-cells technique applied to a volume-limited sample of 44 931 L-* galaxies. We demonstrate that L-* galaxies display hierarchical clustering up to order p= 6 in redshift space. The variance measured for L-* galaxies is in excellent agreement with the predictions from a Lambda-cold dark matter N-body simulation. This applies to all cell radii considered, 0.3 < (R/h(-1) Mpc) < 30. However, the higher order correlation functions of L-* galaxies have a significantly smaller amplitude than is predicted for the dark matter for R < 10 h(-1) Mpc. This disagreement implies that a non-linear bias exists between the dark matter and L-* galaxies on these scales. We also show that the presence of two rare, massive superclusters in the 2dFGRS has an impact on the higher-order clustering moments measured on large scales MH - Australia MH - Canada MH - United Kingdom MH - Germany MH - Mexico|Puebla MH - Spain MH - Switzerland MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 28 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221976900004 L2 - cosmology : observations;large-scale structure of Universe;LUMINOSITY DEPENDENCE; PERTURBATION-THEORY; DENSITY; SIMULATIONS; EVOLUTION; APM; FLUCTUATIONS; STATISTICS; UNIVERSE; BIAS SO - Monthly Notices of the Royal Astronomical Society 2004 ;351(2):L44-L49 10167 UI - 5768 AU - Bautista CJ AU - Ledesma H AU - Nathanielsz PW AU - Zambrano E AD - Inst Nacl Ciencias Med & Nutr SZ, Dept Biol Producc, Mexico City, DF, MexicoNYU, Sch Med, Dept Obstet & Gynecol, Ctr Womens Hlth Res, New York, NY, USA TI - Low protein isocaloric diet during lactation in the rat reduces food intake, body weight (WT) and liver fat content in male progeny MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 1071-5576 UR - ISI:000220184500828 SO - Journal of the Society for Gynecologic Investigation 2004 ;11(2):355A-355A 10168 UI - 3840 AU - Baylis WE AU - Sobczyk G AD - Univ Windsor, Dept Phys, Windsor, ON N9B 3P4, CanadaUniv Amer, Dept Fis & Matemat, Puebla 72820, MexicoBaylis, WE, Univ Windsor, Dept Phys, Windsor, ON N9B 3P4, Canada TI - Relativity in Clifford's geometric algebras of space and spacetime AB - Of the various formalisms developed to treat relativistic phenomena, those based on Clifford's geometric algebra are especially well adapted for clear geometric interpretations and computational efficiency. Here we study relationships between formulations of special relativity in the spacetime algebra (STA) Cl-1,Cl-3 of the underlying Minkowski vector space, and in the algebra of physical space (APS) Cl-3. STA lends itself to an absolute formulation of relativity, in which paths, fields, and other physical properties have observer-independent representations. Descriptions in APS are related by a one-to-one mapping of elements from APS to the even subalgebra STA(+) of STA. With this mapping, reversion in APS corresponds to hermitian conjugation in STA. The elements of STA+ are all that is needed to calculate physically measurable quantities (called measurables) because only they entail the observer dependence inherent in any physical measurement. As a consequence, every relativistic physical process that can be modeled in STA also has a representation in APS, and vice versa. In the presence of two or more inertial observers, two versions of APS present themselves. In the absolute version, both the mapping to STA+ and hermitian conjugation are observer dependent, and the proper basis vectors of any observer are persistent vectors that sweep out time-like planes in spacetime. To compare measurements by different inertial observers in APS, we express them in the proper algebraic basis of a single observer. This leads to the relative version of APS, which can be related to STA by assigning every inertial observer in STA to a single absolute frame in STA. The equivalence of inertial observers makes this permissible. The mapping and hermitian conjugation are then the same for all observers. Relative APS gives a covariant representation of relativistic physics with spacetime multivectors represented by multiparavectors in APS. We relate the two versions of APS as consistent models within the same algebra MH - Canada MH - Mexico|Puebla PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000225299000006 L2 - Clifford algebra;geometric algebra;spacetime algebra;algebra of physical space;absolute and relative formulations of special relativity;covariant representations;multiparavectors;PHYSICS SO - International Journal of Theoretical Physics 2004 ;43(10):2061-2079 10169 UI - 3593 AU - Bazua-Duran C AU - Au WWL AD - Univ Hawaii, SOEST, Dept Oceanog, Honolulu, HI 96822, USAUniv Hawaii, Hawaii Inst Marine Biol, Kailua, HI 96734, USABazua-Duran, C, Natl Autonomous Univ Mexico, Dept Fis, Fac Ciencias, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Geographic variations in the whistles of spinner dolphins (Stenella longirostris) of the Main Hawai'ian Islands AB - Geographic variations in the whistles of Hawai'ian spinner dolphins are discussed by comparing 27 spinner dolphin pods recorded in waters off the Islands of Kaua'i., O'ahu, Cana'i, and Hawai'i. Three different behavioral states, the number of dolphins observed in each pod, and ten parameters extracted from each whistle contour were considered by using clustering and discriminant function analyses. The results suggest that spinner dolphin pods in the Main Hawai'ian Islands share characteristics in approximately 48% of their whistles. Spinner dolphin pods had similar whistle parameters regardless of the island, location, and date when they were sampled and the dolphins' behavioral state and pod size. The term "whistle-specific subgroup" (WSS) was used to designate whistle groups with similar whistles parameters (which could have been produced in part by the same dolphins). The emission rate of whistles was higher when spinner dolphins were socializing than when they were traveling or resting, suggesting that whistles are mainly used during close-range interactions. Spinner dolphins also seem to vary whistle duration according to their general behavioral state. Whistle duration and the number of turns and steps of a whistle may be more important in delivering information at the individual level than whistle frequency parameters. (C) 2004 Acoustical Society of America MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: ACOUSTICAL SOC AMER AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Acoustics U5 - J;Article AV - English IS - 0001-4966 UR - ISI:000225914400052 L2 - RESIDENT KILLER WHALES; BOTTLE-NOSED-DOLPHIN; PACIFIC SPERM-WHALES; ORCINUS-ORCA; TURSIOPS-TRUNCATUS; DIALECTS; VOCALIZATIONS; REPERTOIRES; WATERS; CALLS SO - Journal of the Acoustical Society of America 2004 ;116(6):3757-3769 10170 UI - 3767 AU - Beasley DWC AU - Davis CT AU - Estrada-Franco J AU - Navarro-Lopez R AU - Campomanes-Cortes A AU - Tesh RB AU - Weaver SC AU - Barrett ADT AD - Univ Texas, Dept Pathol, Med Branch, Galveston, TX 77555, USAComis Mexico Unidos Prevenc Fiebre Aftosa & Otras, Mexico City, DF, MexicoBeasley, DWC, Univ Texas, Dept Pathol, Med Branch, 301 Univ Blvd, Galveston, TX 77555 USA TI - Genome sequence and attenuating mutations in West Nile virus isolate from Mexico AB - The complete genome sequence of a Mexican West Nile virus isolate, TM171-03, included 46 nucleotide (0.42%) and 4 amino acid (0.11%) differences from the NY99 prototype. Mouse virulence differences between plaque-purified variants of TM171-03 with mutations at the E protein glycosylation motif suggest the emergence of an attenuating mutation MH - Mexico|Distrito Federal MH - USA PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 21 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000225528000029 L2 - ENVELOPE PROTEIN; UNITED-STATES; STRAINS; NEUROINVASIVENESS; ENCEPHALITIS SO - Emerging Infectious Diseases 2004 ;10(12):2221-2224 10171 UI - 4338 AU - Beaver CR AU - Earle SA AU - Tunnell JW AU - Evans EF AU - de la Cerda AV AD - Texas A&M Univ, Harte Res Inst Gulf Mexico Studies, Corpus Christi, TX 78412, USANatl Geog Soc Sustainable Seas Expediat, Pebble Beach, CA 93953, USAUniv Veracruzana, Veracruz 94294, MexicoBeaver, CR, Texas A&M Univ, Harte Res Inst Gulf Mexico Studies, 6300 Ocean Dr, Corpus Christi, TX 78412 USA TI - Mass spawning of reef corals within the Veracruz Reef System, Veracruz, Mexico MH - Mexico|Veracruz MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Editorial Material AV - English IS - 0722-4028 UR - ISI:000224249800002 SO - Coral Reefs 2004 ;23(3):324-324 10172 UI - 4586 AU - Becerra-Posada F AU - Berwick D AU - Bhutta Z AU - Chowdhury M AU - de Savigny D AU - Haines A AU - Hyder A AU - Lavis J AU - Lumbiganon P AU - Mills A AU - Mshinda H AU - Narayan R AU - Oxman A AU - Sanders D AU - Sewankambo N AU - Tomson G AU - Victora C AD - Univ London London Sch Hyg & Trop Med, Deans Off, London WC1E 7HT, EnglandMinist Hlth, Coordinat Gen Natl Inst Hlth, Mexico City, DF, MexicoInst Healthcare Improvement, Boston, MA, USAAga Khan Univ, Dept Paediat, Karachi, PakistanBRAC, Dhaka, BangladeshSwiss Trop Inst, CH-4002 Basel, SwitzerlandJohns Hopkins Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD, USAMcMaster Univ, Hlth Sci Ctr, Hamilton, ON, CanadaKhon Kaen Univ, Fac Med, Dept Obstet & Gynecol, Khon Kaen, ThailandLondon Sch Hyg & Trop Med, Dept Publ Hlth & Policy, London WC1, EnglandIfakara Hlth Res & Dev Ctr, Ifakara, TanzaniaCHC Bangalore, Peoples Hlth Movement Secretariat Global, Bangalore, Karnataka, IndiaNorwegian Hlth Serv Res Ctr, Informed Choice Res Dept, Oslo, NorwayUniv Western Cape, Sch Publ Hlth, ZA-7535 Bellville, Cape, South AfricaMakerere Univ, Fac Med, Kampala, UgandaKarolinska Inst, Dept Publ Hlth Sci, IHCAR Div Int Hlth, Stockholm, SwedenUniv Fed Pelotas, Pelotas, RS, BrazilHaines, A, Univ London London Sch Hyg & Trop Med, Deans Off, Keppel St, London WC1E 7HT, England TI - Informed choices for attaining the Millennium Development Goals: towards an international cooperative agenda for health-systems research AB - Health systems constraints are impeding the implementation of major global initiatives for health and the attainment of the Millennium Development Goals (MDGs). Research could contribute to overcoming these barriers. An independent task force has been convened by WHO to suggest areas where international collaborative research could help to generate the knowledge necessary to improve health systems. Suggested topics encompass financial and human resources, organisation and delivery of health services, governance, stewardship, knowledge management, and global influences. These topics should be viewed as tentative suggestions that form a basis for further discussion. This article is part of a wide-ranging consultation and comment is invited. The potential agenda will be presented at the Ministerial Summit on Health Research in November, 2004, and revised in the light of responses. Subsequently, we hope that resources will be committed to generate the evidence needed to build the equitable, effective, and efficient health systems needed to achieve the MDGs MH - Bangladesh MH - Brazil MH - Canada MH - United Kingdom MH - India MH - Mexico|Distrito Federal MH - Norway MH - Pakistan MH - South Africa MH - Sweden MH - Switzerland MH - Tanzania MH - Thailand MH - Uganda MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 29 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000223831000032 L2 - PUBLIC-HEALTH; COUNTRIES; EXPENDITURE; EDUCATION; CHILDREN; IMPACT SO - Lancet 2004 ;364(9438):997-1003 10173 UI - 5195 AU - Becheran-Maron L AU - Peniche C AU - rguelles-Monal W AD - CIAD, Guaymas 85400, Sonora, MexicoUniv La Habana, Ctr Biomat, Havana 10400, CubaUniv La Habana, IMRE, Havana 10400, CubaArguelles-Monal, W, CIAD, Unidad Guaymas,Carretera Varadero Nacl Km 6-6,Apd, Guaymas 85400, Sonora, Mexico TI - Study of the interpolyelectrolyte reaction between chitosan and alginate: influence of alginate composition and chitosan molecular weight AB - The interpolyelectrolyte reaction between chitosan (CHI) and alginate (ALG) was followed by conductimetry and potentiometry. Five chitosan samples, all with almost the same degree of N-acetylation (DA approximate to 0.20) and molecular weights ranging from 5 x 10(3) to 2.5 x 10(5) Da were used. The polyelectrolyte complex was formed using alginate samples with three different M/G values (0.44, 1.31 and 1.96). The composition of the complex, Z (Z = [CHI]/[ALG]) resulted 0.70 +/- 0.02, independently of the molecular weight of chitosan and the composition of the alginate used. The degree of complexation was 0.51 with no dependence on the alginate composition. (C) 2004 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0141-8130 UR - ISI:000222141100016 L2 - chitosan;alginate;polyelectrolyte complex;SODIUM ALGINATE; NITROUS-ACID; RELEASE; DEPOLYMERIZATION; MICROCAPSULES; MANIPULATION; COMPLEXES; DRUG SO - International Journal of Biological Macromolecules 2004 ;34(1-2):127-133 10174 UI - 6361 AU - Beck TL AU - Riera A AU - Raga AC AU - Aspin C AD - Gemini Observ, No Operat, Hilo, HI 96720, USAUniv Politecn Catalunya, Dept Fis & Engn Nucl, E-08800 Vilanova I La Geltru, SpainUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBeck, TL, Gemini Observ, No Operat, 670 N Aohoku Pl, Hilo, HI 96720, USA TI - The three-dimensional structure of HH 32 from GMOS IFU spectroscopy AB - We present new high-resolution spectroscopic observations of the Herbig-Haro object HH 32 from system verification observations made with the GMOS IFU at Gemini North Observatory. The three-dimensional spectral data cover a 8."7 x 5."85 spatial field and 4820-7040 Angstrom spectral region centered on the HH 32 A knot complex. We show the position-dependent line profiles and radial velocity channel maps of the Halpha line, as well as line ratio velocity channel maps of [O III] lambda5007/Halpha, [O I] lambda6300/Halpha, [N II] lambda6583/Halpha, [S II] lambdalambda(6716+6730)/Halpha, and [S II] lambda6716/lambda6730. We find that the line emission and the line ratios vary significantly on spatial scales of similar to1" and over velocities of similar to50 km s(-1). A "3/2-dimensional'' bow shock model is qualitatively successful at reproducing the general features of the radial velocity channel maps, but it does not show the same complexity as the data, and it fails to reproduce the line ratios in our high spatial resolution maps. The observations of HH 32 A show two or three superposed bow shocks with separations of similar to3", which we interpret as evidence of a line-of-sight superposition of two or three working surfaces located along the redshifted body of the HH 32 outflow MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000188745300032 L2 - ISM : Herbig-Haro objects;ISM : individual (HH 32);ISM : jets and outflows;ISM : kinematics and dynamics;HERBIG-HARO OBJECTS; INTERSTELLAR BOW SHOCKS; EMISSION-LINE PROFILES; PREDICTED LONG-SLIT; PROPER MOTIONS; HH OBJECTS; RESOLUTION; EXCITATION; SPECTROPHOTOMETRY; AS-353A/HH-32 SO - Astronomical Journal 2004 ;127(1):408-419 10175 UI - 5847 AU - Becker D AU - Garcia SG AU - Ellertson C AD - Populat Council, Reg Off Latin Amer & Caribbean, Mexico City, DF, MexicoIbis Reprod Hlth, Boston, MA, USAGarcia, SG, Populat Council, Reg Off Latin Amer & Caribbean, Panzacola 62,Interior 102,Colonia Villa Coyoacan, Mexico City, DF, Mexico TI - Do Mexico City pharmacy workers screen women for health risks when they sell oral contraceptive pills over-the-counter? AB - Context: In Mexico, oral contraceptives (OCs) are available to women over-the-counter in pharmacies. While past research has suggested that nonmedical providers, such as pharmacy workers, are capable of screening women for contraindications to OCs, little is known about their practices. Methods: After selecting a 10% random sample of all pharmacies in Mexico City (n = 108), we surveyed the first available pharmacy worker to learn more about pharmacy workers' screening practices when selling OCs over-the-counter to women. Results: While nearly all of the pharmacy workers surveyed had sold OCs without a prescription, only 31% reported asking women any questions before selling pills. Among those who asked questions, the most commonly asked questions were about other medications a woman was taking, about blood pressure and about alcohol intake. Pharmacy workers did not ask these questions consistently to all clients. Conclusion: Training pharmacy workers might be one strategy to improve screening of women for pill contraindications. However, pharmacy workers may lack the time and motivation to carry out such screening. An alternative strategy might be to better inform women to self-screen for pill contraindications. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000220490300008 L2 - oral contraceptive pills;pharmacy workers;over-the-counter;Mexico;screening SO - Contraception 2004 ;69(4):295-299 10176 UI - 4822 AU - Becker V AU - Gonzalez-Serratos H AU - Alvarez R AU - Baermann M AU - Irles C AU - Ortega A AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Maryland, Sch Med, Dept Physiol, Baltimore, MD 21201, USATech Univ Munich, Dept Phys Biophys E22, D-80333 Garching, GermanyInst Nacl Perinatol, Dept Bioquim, Mexico City 11000, DF, MexicoOrtega, A, Univ Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, Mexico TI - Effect of endurance exercise on the Ca2+ pumps from transverse tubule and sarcoplasmic reticulum of rabbit skeletal muscle AB - The sarcoplasmic reticulum (SR) Ca2+ pump is the main homeostatic regulatory mechanism in fast skeletal muscle that maintains intracellular Ca2+ concentration ([Ca2+](i)) at the nanomolar level at rest. The transverse tubule (TT) Ca2+ pump transports cytosolic Ca2+ to the extracellular space. During prolonged muscular activity, [Ca2+](i) may increase. TT and SR isolated microsomal vesicles were highly purified, and the purity was checked by imununoblotting. The present study shows the effects of endurance exercise on the activities and structures of the TT and SR Ca2+ pumps of fast skeletal muscle from rabbit at rest. The Ca2+ pump activity increased manifolds in TT but did not change in SR. The protein denaturalization profiles obtained by differential scanning calorimetry showed 1) a shift in the transition temperature and an increase in the enthalpy of the TT Ca2+ pump and 2) a significant change in the transition temperature of the SR Ca2+ pump Ca2+-binding domain. We conclude that the TT Ca2+ pump activity was upgraded in association with structural changes to handle the changes in [Ca2+](i) and TT lumen Ca2+ concentration that occur during endurance exercise MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physiology;Sport Sciences U5 - J;Article AV - English IS - 8750-7587 UR - ISI:000222936500003 L2 - muscle adaptation;exercise training;SODIUM-CALCIUM EXCHANGE; CHRONIC STIMULATION; STRUCTURAL-CHANGES; GENE-EXPRESSION; TWITCH MUSCLE; ATPASE; CA2+-ATPASE; ADAPTATION; PROTEIN; RAT SO - Journal of Applied Physiology 2004 ;97(2):467-474 10177 UI - 3664 AU - Beene JR AU - Varner RL AU - Baktash C AU - Galindo-Uribarri A AU - Gross CJ AU - del Campo JG AU - Halbert ML AU - Hausladen PA AU - Larochelle Y AU - Liang JF AU - Mas J AU - Mueller PE AU - Padilla-Rodal E AU - Radford DC AU - Shapira D AU - Stracener DW AU - Urrego-Blanco JP AU - Yu CH AD - Oak Ridge Natl Lab, HRIBF, Div Phys, Oak Ridge, TN 37831, USAOak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831, USAUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USANatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBeene, JR, Oak Ridge Natl Lab, HRIBF, Div Phys, Oak Ridge, TN 37831, USA TI - Coulomb excitation studies of Sn-132,Sn-134 AB - We have measured the B(E2;0(+) --> 2(+)) for the first excited 2(+) states in the double-closed shell nucleus Sn-132 and the two-neutron nucleus Sn-134. The results, based on a preliminary analysis are shown in Fig. 1 along with measurements on the stable Sn isotopes, and earlier results on Sn-126,Sn-128,Sn-130 [1]. The experimental setup developed for the Sn-132,Sn-134 measurements was also employed in a successful measurement of B(E2;0(+) --> 2(+)) for the closed-neutron-shell nucleus Ge-82 MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000225682600087 SO - Nuclear Physics A 2004 ;746():471C-474C 10178 UI - 4333 AU - Bej SK AU - Maity SK AU - Turaga UT AD - Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoPenn State Univ, Dept Energy & Geoenvironm Engn, Fuel Sci Program, University Pk, PA 16802, USABej, SK, Univ Michigan, Dept Chem Engn, 3230 HH Dow Bldg,2300 Hayward Ave, Ann Arbor, MI 48109 USA TI - Search for an efficient 4,6-DMDBT hydrodesulfurization catalyst: A review of recent studies AB - Almost complete removal of 4,6-dimethyl dibenzothiophene (4,6-DMDBT) will perhaps be inevitable for reducing the sulfur content of diesel to a level of 50 wppm and lower. The hydrodesulfurization (HDS) of 4,6-DMDBT does not tend to occur through direct desulfurization, a pathway typically followed by reactive sulfur compounds over conventional CoMo/Al2O3 catalysts. Its reactivity can be enhanced either by increasing the rate of direct desulfurization or by transforming it to a more activated molecule through hydrogenation, isomerization, demethylation, and C-C bond scission. Attempts have been made to develop better catalysts using these concepts. Different additives such as phosphorus, fluorine, and lanthanum have been added to the alumina support for developing the required catalytic properties. Various other supports such as zeolite, zirconia, titania, etc., by themselves or in admixtures with alumina have also been used to improve the HDS activities of the catalysts. This article reviews the results of recent studies conducted in this area and summarizes the advances that have taken place in this direction MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Review AV - English IS - 0887-0624 UR - ISI:000223976800001 L2 - METHYL-SUBSTITUTED DIBENZOTHIOPHENES; CO-MO CATALYSTS; SILICEOUS MCM-41-SUPPORTED CATALYSTS; SUPPORTED MOLYBDENUM CARBIDE; MODEL SULFUR-COMPOUNDS; DEEP HYDRODESULFURIZATION; MIXED-OXIDE; GAS OIL; ALUMINA CATALYSTS; DIESEL FUEL SO - Energy & Fuels 2004 ;18(5):1227-1237 10179 UI - 3912 AU - Belfield KD AU - Morales AR AU - Kang BS AU - Hales JM AU - Hagan DJ AU - Van Stryland EW AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816, USAUniv Cent Florida, Coll Opt & Photon, FPCE, Orlando, FL 32816, USAUniv Autonoma Puebla, Ctr Quim, Puebla, MexicoBelfield, KD, Univ Cent Florida, Dept Chem, POB 162366, Orlando, FL 32816 USA TI - Synthesis, characterization, and optical properties of new two-photon-absorbing fluorene derivatives AB - The synthesis of a series of four new compounds containing fluorenyl chromophores is presented, along with the results of spectroscopic and photochemical studies aimed at understanding the two-photon absorption properties and energetics of their electronically excited states. The molecular structures of the compounds were systematically varied to allow comparison of molecules possessing high and low molecular symmetry, short and long alkyl chains, and a fluorenyl conjugated pi-system. Solvent-dependent absorption and emission were investigated along with pi-conjugation length. Preliminary measurements of two-photon absorption (2PA) using a two-photon fluorescence method indicate that these chromophores exhibit high two-photon absorptivity. A symmetrical molecule (3), possessing a relatively large pi-conjugated system, flanked on either side by electron-withdrawing groups (benzothiazole), exhibited a peak 2PA cross section (delta) of 6000 x 10(-50) cm(4) s photon(-1) molecule(-1) at 600 nm. Excitation anisotropy studies revealed the position of the S-0 --> S-1 and S-0 --> S-2 electronic transitions. Consistent with quantum mechanical selection rules, the two-photon allowed transition (S-0 --> S-2) was dominant MH - USA MH - Mexico|Puebla PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000225078600025 L2 - 2-PHOTON ABSORPTION; DATA STORAGE; FLUORESCENCE; CHROMOPHORES; EXCITATION; MICROFABRICATION; MICROSCOPY; DESIGN; DYES SO - Chemistry of Materials 2004 ;16(23):4634-4641 10180 UI - 5394 AU - Belfield KD AU - Morales AR AU - Hales JM AU - Hagan DJ AU - Van Stryland EW AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, CREOL, Sch Opt, FPCE, Orlando, FL 32816, USABenemerita Univ Autonoma Puebla, Ctr Quim, Puebla, MexicoBelfield, KD, Univ Cent Florida, Dept Chem, POB 162366, Orlando, FL 32816 USA TI - Linear and two-photon photophysical properties of a series of symmetrical diphenylaminofluorenes AB - A series of linear, symmetrical, diphenylaminofluorene-based materials are reported. The series investigated was model 9,9-didecyl-2,7-bis(N,N-diphenylamino)fluorene (1), oligomer 9,9-didecyl-N,N-bis(9,9-didecyl-7-N,N-diphenylaminofluoren-2-yl)-N,N-dip henyl-fluorene-2,7-diamine (2), and poly(9,9-didecyl-2,7-diphenylaminofluorene) (3). Structural characterization and photophysical properties, including linear absorption, quantum yields, single photon fluorescence, and two-photon absorption (2PA) spectra, were studied in polar and nonpolar solvents. 2PA spectra were determined by two independent methods: a nonlinear transmission method employing a femtosecond white-light continuum (WLC) and a two-photon fluorescence (2PF) method. Polymer 3, a low-molecular-weight polymer with fourteen fluorene units, exhibited a very large two-photon absorption cross-section of 17 200 and 6800 x 10(-50) cm(4) s photon(-1) molecule(-1) as estimated from the WLC and 2PF methods, respectively MH - USA MH - Mexico|Puebla PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0897-4756 UR - ISI:000221683300031 L2 - ABSORBING FLUORENE DERIVATIVES; BACKWARD-STIMULATED EMISSION; PHASE-CONJUGATION PROPERTIES; ABSORPTION CROSS-SECTIONS; MULTIBRANCHED STRUCTURES; ONE-PHOTON; CHROMOPHORES; EXCITATION; MICROFABRICATION; PHOTOSTABILITY SO - Chemistry of Materials 2004 ;16(11):2267-2273 10181 UI - 5910 AU - Bellanti JA AU - Zeligs BJ AU - Mendez-Inocencio J AU - Garcia-Garcia MD AU - Islas-Romero R AU - Omidvar B AU - Omidvar J AU - Kim G AU - de Castro JF AU - Amor JS AU - Walls L AU - Bellini WJ AU - Valdespino-Gomez JL AD - Georgetown Univ, Med Ctr, Int Ctr Interdisciplinary Studies Immunol, Washington, DC 20007, USAGeorgetown Univ, Med Ctr, Dept Pediat, Washington, DC 20007, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoCtr Dis Control & Prevent, Atlanta, GA, USABellanti, JA, Georgetown Univ, Med Ctr, Int Ctr Interdisciplinary Studies Immunol, Washington, DC 20007 USA TI - Immunologic studies of specific mucosal and systemic immune responses in Mexican school children after booster aerosol or subcutaneous immunization with measles vaccine AB - The purpose of the present study was to compare serum and mucosal immune responses following either aerosol (Aer) or subcutaneous (SQ) measles immunization of Mexican school children. A cohort of 49 children from 6 to 7 years of age received either Aer (n = 22) or SQ (n = 27) Edmonston-Zagreb (EZ) measles vaccine. Serum and nasal secretions were collected prior to (Pre), 1 and 3 months (mos) intervals and analyzed for immunoglobulin (Ig) concentrations and measles specific Ig isotype-associated antibody by enzyme immunoassay (EIA). Serum and nasal IgG and IgA antibody responses were stimulated following immunization with live, attenuated EZ measles vaccine administered either by SQ or Aer routes but these responses were significantly greater by the Aer compared to the SQ route. These studies also suggest that the level of antibody in these secretions may serve as an important marker of immunity to measles and lend further support for aerosol immunization as an effective alternative vaccine delivery strategy for measles eradication. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Morelos PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 13 U4 - Immunology;Medicine, Research & Experimental;Veterinary Sciences U5 - J;Article AV - English IS - 0264-410X UR - ISI:000220328100018 L2 - mucosal and systemic immune responses;measles vaccine;school children;ATYPICAL MEASLES; NASAL SECRETIONS; ALTERNATIVE ROUTES; MATERNAL ANTIBODY; RANDOMIZED-TRIAL; RHESUS MACAQUES; VIRUS; SCHOOLCHILDREN; SERUM SO - Vaccine 2004 ;22(9-10):1214-1220 10182 UI - 3418 AU - Bello-Perez LA AU - Sayago-Ayerdi SG AU - Mendez-Montealvo GM AU - Tovar J AD - IPN, Ctr Desarrollo Prod Bioticos, Yautepec 62731, Morelos, MexicoInst Tecnol Acapulco, Acapulco 39300, Guerrero, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041A, VenezuelaBello-Perez, LA, IPN, Ctr Desarrollo Prod Bioticos, Km 8-5 Carr, Yautepec 62731, Morelos, Mexico TI - In vitro digestibility of banana starch cookies AB - Banana starch was isolated and used for preparation of two types of cookies. Chemical composition and digestibility tests were carried out on banana starch and the food products, and these results were compared with corn starch. Ash, protein, and fat levels in banana starch were higher than in corn starch. The high ash amount in banana starch could be due to file potassium Content present in this fruit. proximal analysis was similar between products prepared with banana starch and those based on corn starch. The available starch content of the banana starch preparation was 60% (drub). The cookies had lower available starch than the starches while banana starch had lower susceptibility to the in vitro alpha-amylolysis reaction. Banana starch and its products had higher resistant starch levels than those made with corn starch MH - Mexico|Guerrero MH - Mexico|Morelos MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0921-9668 UR - ISI:000226152000007 L2 - banana;chemical composition;cookies;digestibility;starch;RESISTANT STARCH; SMALL-INTESTINE; HEALTHY HUMANS; DIETARY FIBER; STEAM-COOKING; DIGESTION; FOODS; POTATO; L. SO - Plant Foods for Human Nutrition 2004 ;59(2):79-83 10183 UI - 3620 AU - Bello-Ramirez AM AU - Nava-Ocampo AA AD - Hosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaUniv Toronto, Leslie Dan Fac Pharm, Toronto, ON, CanadaHosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, MexicoNava-Ocampo, AA, Hosp Sick Children, Div Clin Pharmacol & Toxicol, 555 Univ Ave, Toronto, ON M5G 1X8, Canada TI - A QSAR analysis of toxicity of Aconitum alkaloids AB - Biological activity of Aconitum alkaloids may be related to their toxicity rather than to a specific pharmacological action. A Quantitative structure-activity relationships (QSAR) analysis was performed on the following two groups of alkaloids: compounds with an aroyl/aroyloxy group at R-14 position (yunaconitine, bulleyaconitine, aconitine, beiwutine, nagarine, 3-acetyl aconitine, and penduline), and compounds with the aroyloxy group at R-4 position (N-deacetyllappaconitine, lappaconitine, ranaconitine, N-deacetylfinaconitine, N-deacetylranaconitine). The LD50 (mumol/kg) of the 12 alkaloids were obtained from the literature. LD50 was significantly lower in group I than in group 2. The steric and core-core repulsion energies were significantly higher in group 1. The total energy and heat of formation and electronic energies were significantly lower in group 1. The reactivity index of N, Cl', C4' and C6' were similar between groups. The reactivity index of C2' was significantly higher and the reactivity index of C3' and C5' were significantly lower in group 1. Log P and pKa were similar between groups. Molecular weight was significantly higher in group 1. A significant linear relationship was observed between log LD50 and either analgesic log ED50 or local anesthetic log ED50. The LD50/analgesic ED50 obtained from average values was 5.9 for group 1 and 5.0 for group 2. However, the LD50/ local anesthetic ED50 was 40.4 and 318, respectively. The study supports that the analgesic effects of these alkaloids are secondary to their toxic effects whereas alkaloids from group 2 are susceptible to be further studied as local anesthetic agents MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0767-3981 UR - ISI:000225737800013 L2 - Aconitum alkaloids;natural products;theoretical models;toxicity;CENTRAL-NERVOUS-SYSTEM; STRUCTURAL-PROPERTIES; EXPLAIN SO - Fundamental & Clinical Pharmacology 2004 ;18(6):699-704 10184 UI - 5634 AU - Bello-Ramirez AM AU - Nava-Ocampo AA AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, MexicoUniv Toronto, Fac Pharm, Mol Design & Informat Technol Ctr, Toronto, ON, CanadaHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaNava-Ocampo, AA, Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, Mexico TI - The local anesthetic activity of Aconitum alkaloids can be explained by their structural properties: a QSAR analysis AB - Alkaloids isolated from Aconitum roots exhibit anesthetic effects at peripheral nerves. We performed the present quantitative structure-activity relationship (QSAR) analysis in order to understand the mechanism of action as local anesthetics of 11 Aconitum alkaloids. The alkaloids with the highest anesthetic activity had an aroyl/ aroyloxy group at R-14 position while the weaker anesthetic alkaloids had the aroyloxy group at R-4. The stable compounds exhibited a higher local anesthetic activity than the unstable compounds. In relation to the reactivity indexes of atoms on the aromatic ring, C2' was more reactive while C3' and C5' were less reactive in the compounds with the highest anesthetic activity. Reactivity of N, C1', C4' and C6' was similar between the two groups of alkaloids. The pK(a) was approximately 7.3 in both groups. The local anesthetic ED50 of alkaloids was significantly inversely related to molecular weight, core-core repulsion energy, steric energy and RI-C2', and directly related to electronic energy, total energy, RI-C5' and to the heat of formation. In conclusion, we identified a set of structural parameters that are related to the local anesthetic activity of Aconitum alkaloids. Our findings are useful to understand the mechanism of action of these alkaloids and to provide a rational for chemical manipulation of the compounds in order to obtain potent derivates with minor toxicity MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0767-3981 UR - ISI:000221047000003 L2 - Aconitum alkaloids;bio-organic chemistry;local anesthetics;natural products;theoretical models;CENTRAL-NERVOUS-SYSTEM; CAUDAL ANESTHESIA; TOXICITY; CHILDREN; INFANTS SO - Fundamental & Clinical Pharmacology 2004 ;18(2):157-161 10185 UI - 5916 AU - Bellon MR AU - Berthaud J AD - CIMMYT, Mexico City 06600, DF, MexicoInst Rech Dev, F-34394 Montpellier 5, FranceBellon, MR, CIMMYT, Apartado Postal 6-641, Mexico City 06600, DF, Mexico TI - Transgenic maize and the evolution of landrace diversity in Mexico. The importance of farmers' behavior MH - France MH - Mexico|Distrito Federal PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000220360400001 L2 - RICE ORYZA-SATIVA; GENE FLOW; CONSERVATION; SELECTION; OAXACA; MANAGEMENT; CHIAPAS; DNA; L. SO - Plant Physiology 2004 ;134(3):883-888 10186 UI - 4316 AU - Belmares R AU - Contreras-Esquivel JC AU - Rodriguez-Herrera R AU - Coronel AR AU - Aguilar CN AD - Univ Autonoma Coahuila, Sch Chem, Food Res Dept, Unidad Saltillo, Coahuila, MexicoUniv Aix Marseille 1, ESIL, Inst Rech Dev, Microbiol Lab, F-132888 Marseille 9, FranceAguilar, CN, Univ Autonoma Coahuila, Sch Chem, Food Res Dept, Unidad Saltillo, Blvd Venustiano Carranza,POB 252,ZIP 2500, Coahuila, Mexico TI - Microbial production of tannase: an enzyme with potential use in food industry AB - Tannase catalyses the hydrolysis of gallic acid esters and hydrolysable tannins. This enzyme is produced by plants and microorganisms and it is industrially used as catalysts in the manufacture of gallic acid. Also, it is potentially used in beverage and food processing. Two critical factors, production costs and insufficient knowledge of the basic characteristics, physicochemical properties, catalytic characteristics, regulation mechanisms and potential uses, limit the use of tannase at the industrial level. This work reviews the state of critical aspects related to the tannase, emphasizing aspects such as sources, substrates, metabolic regulation mechanisms, physicochemical properties, inhibitors, production, applications and potential uses. (C) 2004 Swiss Society of Food Science and Technology. Published by Elsevier Ltd. All rights reserved MH - France MH - Mexico|Coahuila PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0023-6438 UR - ISI:000224014700007 L2 - tannase;tannins;regulation mechanism;properties;production;applications;TANNIN ACYL HYDROLASE; SOLID-STATE FERMENTATION; ASPERGILLUS-NIGER AA-20; FUNGAL TANNASE; GALLIC ACID; IMMOBILIZATION; PURIFICATION; HYDROLYSIS; INDUCTION; CULTURES SO - Lebensmittel-Wissenschaft Und-Technologie-Food Science and Technology 2004 ;37(8):857-864 10187 UI - 2653 AU - Belmont MA AU - Cantellano E AU - Thompson S AU - Williamson M AU - Sanchez A AU - Metcalfe CD AD - Trent Univ, Water Qual Ctr, Peterborough, ON K9J 7B8, CanadaUniv Nacl Autonoma Mexico, Mexico City, DF, MexicoSir Sandford Fleming Coll, Ctr Alternat Wastewater Treatment, Lindsay, ON, CanadaH Ayuntamiento Texcoco, Dept Agua Potable & Alcantarillado, Mexico City, DF, MexicoBelmont, MA, Louisiana State Univ, Wetlands Biogeochem Inst, Baton Rouge, LA 70803 USA TI - Treatment of domestic wastewater in a pilot-scale natural treatment system in central Mexico AB - There is severe degradation of the water quality of the Texcoco River in central Mexico as a result of discharges of raw sewage from communities into the watershed. Constructed wetlands may be appropriate technologies for treating the domestic wastewater Generated by small communities in central Mexico. To assess the removal of pollutants from wastewater, we constructed a pilot-scale treatment wetland in the small community of Santa Maria Nativitas in the Rio Texcoco watershed. The system, consisting of sedimentation terraces, stabilization pond, subsurface flow wetland (SSFW) and vertical flow wetland (VFW), removed > 80% of TSS. COD and nitrate from domestic sewage. Removal of ammonium was less efficient at about 50%. This study also showed that ornamental flowers with high economic value planted in the SSFW performed as well as cattail (Typha angustifolia) in removing TSS and nitrogen. The treated water was suitable for irrigation, which could help to alleviate the scarcity of water in the Rio Texcoco watershed. Modeling exercises indicated that the pilot-scale wetland could be readily adapted to treat sewage from six families. (c) 2004 Elsevier B.V. All rights reserved MH - Canada MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Ecology;Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0925-8574 UR - ISI:000228171100005 L2 - natural treatment systems;treatment wetlands;domestic wastewater;ornamental plants;developing countries;Mexico;CONSTRUCTED WETLANDS; DEVELOPING-COUNTRIES SO - Ecological Engineering 2004 ;23(4-5):299-311 10188 UI - 4493 AU - Belokoneva OS AU - Satake H AU - Mal'tseva EL AU - Pal'mina NP AU - Villegas E AU - Nakajima T AU - Corzo G AD - UNAM, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoSuntory Inst Bioorgan Res, Osaka 6188503, JapanRussian Acad Sci, Inst Biochem Phys, Moscow, RussiaUAEM, Ctr Invest & Biotecnol, Cuernavaca 62210, Morelos, MexicoCorzo, G, UNAM, Inst Biotechnol, Av Univ 2001, Cuernavaca 62210, Morelos, Mexico TI - Pore formation of phospholipid membranes by the action of two hemolytic arachnid peptides of different size AB - Pin2 and Oxki1 are cationic amphipathic peptides that permeate lipid membranes through formation of pores. Their mechanism of binding to phosphocholine (PC) membranes differs. Spin-probe experiments showed that both Pin2 and Oxki1 penetrate the lipid membrane of small unilamellar vesicles (SUVs). Moreover, the leakage of calcein and dextrans from PC vesicles showed that Pin2 agrees with the accumulation of peptides on lipid membranes and form pores of different size. On the other hand, Oxki1 did not act strictly cooperatively and form pores of limited size. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Morelos MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0005-2736 UR - ISI:000223676900007 L2 - cationic amphipathic peptide;spider;scorpion;FITC-dextran;hemolysis;antimicrobial;ANTIMICROBIAL PEPTIDES; MOLECULAR-DYNAMICS; LIPID INTERACTIONS; MAGAININ; MELITTIN; SCATTERING; RESONANCE; VESICLES; DEFENSE; MODEL SO - Biochimica et Biophysica Acta-Biomembranes 2004 ;1664(2):182-188 10189 UI - 2712 AU - Beltran C AU - Vacquier VD AU - Moy G AU - Chen Y AU - Buck J AU - Levin LR AU - Darszon A AD - UNAM, Inst Biotechnol, Cuernavaca, Morelos, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Marine Biol Res Div, La Jolla, CA 92093, USACornell Univ, Weill Med Coll, Dept Pharmacol, New York, NY, USA TI - Sea urchin sperm adenylyl cyclases MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000224648802449 SO - Molecular Biology of the Cell 2004 ;15():312A-312A 10190 UI - 5052 AU - Benammi M AU - Chaimanee Y AU - Urrutia-Fucugauchi J AU - Jaeger JJ AD - Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnet & Geofis Nucl, Mexico City 04510, DF, MexicoDept Mineral Resources, Geol Survey Div, Bangkok 10400, ThailandUniv Montpellier 2, ISEM, Lab Paleontol, F-34095 Montpellier, FranceBenammi, M, Univ Nacl Autonoma Mexico, Inst Geofis, Lab Paleomagnet & Geofis Nucl, Mexico City 04510, DF, Mexico TI - Magnetostratigraphic study of the continental sedimentary sequence of the Chiang Muan Basin, northern Thailand: Implications for the age of the first Miocene Hominoids from Thailand AB - We report results of a magnetostratigraphic study of the Chiang Moan Basin sequence (northern Thailand) that contains the recently discovered Middle Miocene hominoid, ef. Lufengpithecus chiangmuanensis (Chaimanee et al., 2003). Rock magnetic investigations indicate the presence of both high- and low-coercivity minerals. Specimens subjected to progressive thermal demagnetization procedures show that nearly all of them exhibit a low-temperature magnetization component, and a high-temperature one, characterized by either normal or reverse polarity, considered as the characteristic Miocene magnetization. The two directions (D = 9.8degrees 1 = 32.8degrees, n = 15, and D = 175.9degrees, I = -37.5, it = 5) are not exactly antipodal, but pass the analytical reversal test with "C" quality classifications. The mean direction is close to the expected direction derived from the apparent polar wander (APW) path of Eurasia for the Middle Miocene. The inclination value is lower than expected at the site latitude, consistent with a sedimentary inclination error for the original depositional remanent magnetization. The section studied was tentatively correlated with the geomagnetic polarity time scale, using biostratigraphic data previously proposed for the fauna found in the same basin. These correlations have been achieved by comparing variations in the sedimentation rate derived from alternative Correlations. The proposed correlations suggest an age between 13.5 and 10 Ma for the new hominoid fossil cf. Lufengpithecus chiangmuanensis MH - France MH - Mexico|Distrito Federal MH - Thailand PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 1 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000222487300006 L2 - TECTONICS SO - International Geology Review 2004 ;46(7):646-654 10191 UI - 6328 AU - Benatti F AU - Cappellini V AU - Zertuche F AD - Univ Trieste, Dipartimento Fis Teor, I-34014 Trieste, ItalyIst Nazl Fis Nucl, Sez Trieste, I-34014 Trieste, ItalyUNAM, Inst Matemat, Cuernavaca 62251, Morelos, MexicoBenatti, F, Univ Trieste, Dipartimento Fis Teor, Strada Costiera 11, I-34014 Trieste, Italy TI - Quantum dynamical entropies in discrete classical chaos AB - We discuss certain analogies between quantization and discretization of classical systems on manifolds. In particular, we will apply the quantum dynamical entropy of Alicki and Fannes to numerically study the footprints of chaos in discretized versions of hyperbolic maps on the torus MH - Italy MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000188596700011 L2 - SAWTOOTH; SYSTEMS SO - Journal of Physics A-Mathematical and General 2004 ;37(1):105-130 10192 UI - 5279 AU - Benayas JMR AU - Camacho-Cruz A AD - Univ Alcala de Henares, Dept Interuniv Ecol, Alcala De Henares 28871, SpainECOSUR, Dept Ecol & Sistemat Terrestres, San Cristobal de las Casas 29200, Chiapas, MexicoBenayas, JMR, Univ Alcala de Henares, Dept Interuniv Ecol, Alcala De Henares 28871, Spain TI - Performance of Quercus ilex saplings planted in abandoned Mediterranean cropland after long-term interruption of their management AB - Quercus ilex is a slow-growing, sclerophyllous evergreen oak that is a major structural component of the natural forests and woodlands in western European and northern African Mediterranean regions, and thus a valuable species for revegetation of abandoned cropland. In a field experiment consisting in four combinations of summer irrigation (presence-absence) and artificial shading (presence-absence), we managed 12 plots planted with 50 seedlings each for 3 years, and four plots remained as unmanaged, control plots. Then these treatments were interrupted for 6 years. We measured survival, above-ground growth, and reproductive capability to test the hypothesis that the manipulation of the environment during Q. ilex establishment improves its performance and to suggest adequate forestation practices. Sapling mortality did not differ among treatment plots during the post-treatment period. Previous artificial shading decreased sapling annual growth rate in height, crown projected area, and volume, but not in stem diameter, after it was interrupted. Some evidence points to both abiotic and competition effects as responsible for the growth pattern. Plot cover by the saplings was only marginally affected by the treatments after the treatment plus post-treatment period. Previous summer irrigation and artificial shading increased the percentage of reproductive saplings among treatment plots, and this effect was independent of sapling size. There was a trade-off between growth and reproductive capability. Management of plantations during the first year only would likely provide a better investment/benefit ratio. Artificial shading provided more benefits than summer irrigation during the treatment period but, in the long run, these benefits were approximately equal. We do not advise applying both treatments simultaneously and the technique to be chosen would depend on the relative costs of irrigation and artificial shading. Long experiments under field conditions like the one presented here are scarce in the scientific literature but very valuable to optimize active restoration of Mediterranean abandoned cropland and other ecosystems of the world. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Chiapas MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000221924600018 L2 - growth;artificial shading;mortality;reproduction;summer irrigation;trade-off;PHENOTYPIC PLASTICITY; CANOPY STRUCTURE; FAGUS-SYLVATICA; L. SEEDLINGS; BLACK SPRUCE; TRADE-OFFS; GROWTH; RESPONSES; WATER; LEAF SO - Forest Ecology and Management 2004 ;194(1-3):223-233 10193 UI - 3652 AU - Benet L AU - Merlo O AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Basel, Inst Phys, CH-4056 Basel, SwitzerlandBenet, L, UNAM, Ctr Ciencias Fis, Apdo Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Phase-space structure for narrow planetary rings AB - We address the occurrence of narrow planetary rings under the interaction with shepherds. Our approach is based on a Hamiltonian framework of non-interacting particles where open motion (escape) takes place, and includes the quasi-periodic perturbations of the shepherd's Kepler motion with small and zero eccentricity. We concentrate in the phase-space structure and establish connections with properties like the eccentricity, sharp edges and narrowness of the ring. Within our scattering approach, the organizing centers necessary for the occurrence of the rings are stable periodic orbits, or more generally, stable tori. In the case of eccentric motion of the shepherd, the rings are narrower and display a gap which defines different components of the ring MH - Mexico|Morelos MH - Switzerland PB - LETCHWORTH: TURPION LTD RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mechanics;Physics, Mathematical U5 - J;Article AV - English IS - 1560-3547 UR - ISI:000225646500010 L2 - HAMILTONIAN-SYSTEMS; SCATTERING; DYNAMICS; MODEL SO - Regular & Chaotic Dynamics 2004 ;9(3):373-383 10194 UI - 5392 AU - Benitez JA AU - Fisher TR AD - Univ Maryland, Ctr Environm Sci, Horn Point Lab, Cambridge, MD 21613, USAAutonomous Univ Campeche, Ctr Ecol Fisheries & Oceanog, EPOMEX, Campeche 24000, MexicoBenitez, JA, Univ Maryland, Ctr Environm Sci, Horn Point Lab, Cambridge, MD 21613 USA TI - Historical land-cover conversion (1665-1820) in the Choptank watershed, eastern United States AB - Land-cover changes in the Choptank basin were estimated for 1665-1820 by using historical socioeconomic data and crop-rotation models. Socioeconomic data (human population, output per laborer, and crop yields) were obtained from the literature, whereas crop-rotation models, based on historical records, represented how agriculture was practiced. Model parameters and output were validated with export records, census data, and other historical records, and model errors were estimated to be approximately 5%. This approach indicated a sigmoidal pattern for conversion of primary forest to agricultural land by 1800. The initial time period, 1665-1720, was characterized by low-intensity tobacco and corn cultivation. Due to long fallows, the models indicated that there was little land in crops (approximately 5% of the region), but larger areas of secondary forest occurred on former cropland (approximately 15%). Although primary forest de-creased, the initial result in the first 55 years was a low net rate of deforestation and occupation by low-intensity farms. However, after 1720, cropland expanded rapidly due to the use of wheat as a cash crop. From 1720 to 1775, primary and secondary forest rapidly disappeared, increasing agricultural land to 60% of the region. By 1800, approximately 80% was estimated to be converted to agriculture, and little primary forest remained. After 1800, the land needed for crops decreased due to improved management practices and crop yields, and some secondary forest on formerly cleared agricultural sites may have reappeared. We estimate that less than 150 years of European colonization resulted in virtually complete agriculturalization of a primarily forested landscape MH - USA MH - Mexico|Campeche PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Ecology U5 - J;Article AV - English IS - 1432-9840 UR - ISI:000221765600001 L2 - land-cover modeling;land-use change;deforestation;agricultural history;Chesapeake Bay;CENTRAL NEW-ENGLAND; CHESAPEAKE BAY; VEGETATION DYNAMICS; ECONOMIC-GROWTH; FOREST; PATTERNS; CARBON; MODEL; REGENERATION; COMMUNITIES SO - Ecosystems 2004 ;7(3):219-232 10195 UI - 4675 AU - Benjet C AU - Wagner FA AU - Borges GG AU - Medina-Mora ME AD - Inst Nacl Pesquisas Espaciais, Mexico City 14370, DF, MexicoAutonomous Metropolitan Univ, Mexico City, DF, MexicoMorgan State Univ, Ctr Hlth Dispar Solut, Baltimore, MD 21239, USABenjet, C, Inst Nacl Pesquisas Espaciais, Calzada Mexico Xochimilco 101, Mexico City 14370, DF, Mexico TI - The relationship of tobacco smoking with depressive symptomatology in the Third Mexican National Addictions Survey AB - Background. While an association between cigarette smoking and depression has been established in Anglo populations, replication of tobacco-depression associations in countries where smoking is growing may provide important new insights. The objectives of this study were to estimate the association of depressive symptomatology with tobacco smoking, number of cigarettes smoked daily, and smoking cessation in a representative sample of the Mexican population. Method. The data come from the Third National Addictions Survey (1998) conducted by the Mexican Ministry of Health, representative of Mexico's civilian population residing in cities and towns with 2500+ inhabitants, aged 18-64. Part of a multi-stage, stratified, probability sample, 1935 men and women answered a version of the survey that also included the CES-D depression scale. Analyses addressed the survey's complex design and controlled for income and educational level. Results. Among women only, current smokers had twice the odds of elevated depressive symptomatology than never smokers (OR 2.1, 95 % Cl 1.3-3.5, p = 0.002). For men, only those smoking a pack or more a day had greater odds of depressive symptomatology (OR 5.9, 95 % Cl 1.6-21.9, p = 0.008). Overall, former smokers who ceased smoking within 6 months had lower odds of depressive symptomatology than current smokers (OR 0.4, 95%, CI 0.1-1.0, p = 0.042). Conclusions. These findings add to the accumulating evidence for the association between smoking and depression in different cultures and populations MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Psychology, Clinical;Psychiatry;Psychology U5 - J;Article AV - English IS - 0033-2917 UR - ISI:000223139500012 L2 - MAJOR DEPRESSION; CIGARETTE-SMOKING; NICOTINE DEPENDENCE; MOOD; SYMPTOMS; ADOLESCENCE; ASSOCIATION; SMOKERS SO - Psychological Medicine 2004 ;34(5):881-888 10196 UI - 5800 AU - Benlloch S AU - Berenguer M AU - Prieto M AU - Moreno R AU - San Juan F AU - Rayon M AU - Mir J AU - Segura A AU - Berenguer J AD - Hosp Univ La Fe, Dept Hepatogastroenterol, Valencia, SpainHosp Siglo XXI, Serv Hepatogastroenterol, Mexico City, DF, MexicoHosp Univ La Fe, Dept Surg, Valencia, SpainHosp Univ La Fe, Dept Pathol, Valencia, SpainHosp Univ La Fe, Dept Oncol, Valencia, SpainBenlloch, S, Hosp Univ La Fe, Dept Hepatogastroenterol, Valencia, Spain TI - De novo internal neoplasms after liver transplantation: Increased risk and aggressive behavior in recent years? AB - The goal of the study was to determine the incidence and variables associated with post-liver transplantation (LT) de novo internal neoplasms development, excluding skin tumors and hepatocellular carcinoma. Medical records were reviewed for recipient/donor demographics, viral serology, cause of liver disease, interval from LT to tumor diagnosis, pre-disposing factors, immunosuppression and survival. Forty-one neoplasms (31 solid and 10 hematologic) developed in 772 recipients (5.3%) transplanted between 1991 and 2001. Time to tumor diagnosis was longer in patients transplanted before 1995 than in those transplanted afterwards (58 vs. 22 months; p < 0.05). Hematologic neoplasms [HN) appeared earlier than solid (2 vs. 21 months; p < 0.001), were more prevalent in those transplanted after 1995 than before (32% vs. 12.5%), and had lower survival than solid (2 vs. 21 months, p < 0.001). While HCV was the most frequent indication in HN (70%), alcohol was that of solid tumors (71%). Overall, risk factors for de novo neoplasms included alcohol and immunosuppression (p < 0.01). In patients undergoing LT in recent years, there is a higher incidence of HN with de novo internal neoplasms developing at earlier time-points than in those transplanted years ago. Risk factors for tumor development include alcohol, HCV and possibly strong immunosuppression MH - Mexico|Distrito Federal MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 11 U4 - Surgery;Transplantation U5 - J;Article AV - English IS - 1600-6135 UR - ISI:000220740900017 L2 - alcohol;de novo neoplasms;HCV;immunosuppression;liver transplantation;TERM FOLLOW-UP; ALCOHOLIC CIRRHOSIS; MALIGNANCIES; DISEASE; TACROLIMUS; RECIPIENTS; TUMORS; CANCER SO - American Journal of Transplantation 2004 ;4(4):596-604 10197 UI - 4107 AU - Bergin E AU - Calvet N AU - Sitko ML AU - Abgrall H AU - D'Alessio P AU - Herczeg GJ AU - Roueff E AU - Qi CH AU - Lynch DK AU - Russell RW AU - Brafford SM AU - Perry RB AD - Univ Michigan, Dept Astron, Ann Arbor, MI 48109, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Cincinnati, Dept Phys, Cincinnati, OH 45221, USAObserv Paris, CNRS, Lab Universe & Theories, UMR 8102,Sect Meudon, F-92195 Meudon, FranceUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoUniv Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309, USAAerosp Corp, Los Angeles, CA 90009, USAUniv Dayton, Sch Law, Dayton, OH 45469, USANASA, Langley Res Ctr, Hampton, VA 23681, USABergin, E, Univ Michigan, Dept Astron, 825 Denninson Bldg,501 E Univ Ave, Ann Arbor, MI 48109 USA TI - A new probe of the planet-forming region in T Tauri disks AB - We present new observations of the far-ultraviolet (FUV; 1100-2200 Angstrom) radiation field and the near- to mid-A IR (3-13.5 mum) spectral energy distribution (SED) of a sample of T Tauri stars selected on the basis of bright molecular disks (GM Aur, DM Tau, and LkCa 15). In each source we find evidence for Lyalpha-induced H-2 fluorescence and an additional source of FUV continuum emission below 1700 Angstrom. Comparison of the FUV spectra to a model of H-2 excitation suggests that the strong continuum emission is due to electron impact excitation of H-2. The ultimate source of this excitation is likely X-ray irradiation that creates hot photoelectrons mixed in the molecular layer. Analysis of the SED of each object finds the presence of inner disk gaps with sizes of a few AU in each of these young (similar to1 Myr) stellar systems. We propose that the presence of strong H-2 continuum emission and inner disk clearing are related by the increased penetration power of high-energy photons in gas-rich regions with low grain opacity MH - France MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 27 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224700300011 L2 - accretion, accretion disks;astrobiology;astrochemistry;circumstellar matter;stars : pre-main-sequence;ultraviolet : stars;MAIN-SEQUENCE EVOLUTION; MOLECULAR-HYDROGEN; ELECTRON-IMPACT; CIRCUMSTELLAR DISKS; HYDRAE ASSOCIATION; H-2 FLUORESCENCE; ACCRETION DISKS; YOUNG OBJECTS; GM-AURIGAE; EMISSION SO - Astrophysical Journal 2004 ;614(2):L133-L136 10198 UI - 4494 AU - Bergin EA AU - Hartmann LW AU - Raymond JC AU - Ballesteros-Paredes J AD - Univ Michigan, Ann Arbor, MI 48109, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoBergin, EA, Univ Michigan, 825 Dennison Bldg,501 E Univ Ave, Ann Arbor, MI 48109 USA TI - Molecular cloud formation behind shock waves AB - Motivated by our previous paper, in which we argued for the formation of molecular clouds from large-scale flows in the diffuse Galactic interstellar medium, we examine the formation of molecular gas behind shocks in atomic gas using a one-dimensional chemical/dynamical model. In our analysis we place particular emphasis on constraints placed on the dynamical evolution by the chemistry. The most important result of this study is to stress the importance of shielding the molecular gas from the destructive effects of UV radiation. For shock ram pressures comparable to or exceeding typical local interstellar medium pressures, self-shielding controls the formation time of molecular hydrogen, but CO formation requires shielding of the interstellar radiation field by dust grains. We find that for typical parameters the molecular hydrogen fractional abundance can become significant well before CO forms. The timescale for ( CO) molecular cloud formation is not set by the H-2 formation rate on grains, but rather by the timescale for accumulating a sufficient column density or extinction, A(V) greater than or similar to 0.7. The local ratio of atomic to molecular gas ( 4: 1), coupled with short estimates for the lifetimes of molecular clouds (3 - 5 Myr), suggests that the timescales for accumulating molecular clouds from atomic material typically must be no longer than about 12 - 20 Myr. Based on the shielding requirement, this implies that the typical product of preshock density and velocity must be nvgreater than or similar to20 cm(-3) km s(-1). In turn, depending on the shock velocity, this implies shock ram pressures that are a few times the typical estimated local turbulent gas pressure and comparable to the total pressures ( gas plusmagnetic plus cosmic rays). Coupled with the rapid formation of CO once shielding is sufficient, flow-driven formation of molecular clouds in the local interstellar medium can occur sufficiently rapidly to account for observations. We also provide detailed predictions of atomic and molecular emission and absorption that track the formation of a molecular cloud from a purely atomic medium, with a view toward helping to verify cloud formation by shock waves. However, our predictions suggest that the detection of the pre-CO stages will be challenging. Finally, we provide an analytic solution for time-dependent H-2 formation that may be of use in numerical hydrodynamic calculations MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 43 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223791100031 L2 - ISM : clouds;ISM : evolution;ISM : kinematics and dynamics;ISM : molecules;shock waves;stars : formation;LARGE-SCALE DISSOCIATION; INTERSTELLAR-MEDIUM; STAR-FORMATION; MAGNETIC-FIELDS; PHOTODISSOCIATION REGIONS; DENSITY-FLUCTUATIONS; ATOMIC-HYDROGEN; THERMAL BALANCE; DIFFUSE CLOUDS; DARK CLOUDS SO - Astrophysical Journal 2004 ;612(2):921-939 10199 UI - 5278 AU - Bergshoeff E AU - Gran U AU - Linares R AU - Nielsen M AU - Ortin T AU - Roest D AD - Univ Groningen, Ctr Theoret Phys, NL-9747 AG Groningen, NetherlandsUniv London Kings Coll, Dept Math, London WC2R 2LS, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Inst Fis Teor, E-28049 Madrid, SpainBergshoeff, E, Univ Groningen, Ctr Theoret Phys, Nijenborgh 4, NL-9747 AG Groningen, Netherlands TI - The Bianchi classification of maximal D=8 gauged supergravities AB - We construct maximal D = 8 gauged supergravities by the reduction of D = 11 supergravity over three-dimensional group manifolds. Such manifolds have been classified by Bianchi. We divide the corresponding gauged supergravities into two classes: class A (with a Lagrangian) and class B (without a Lagrangian). The class A theories have 1/2 BPS domain wall solutions that uplift to purely gravitational solutions consisting of 7D Minkowski and a 4D Euclidean geometry. These geometries are generically singular. The two regular exceptions correspond to the near-horizon limit of the single-center or double-centered Kaluza-Klein monopole. In contrast, the class B supergravities are defined by a set of equations of motion that cannot be integrated to an action and allow for no 1/2 BPS domain walls. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0015-8208 UR - ISI:000222004800005 SO - Fortschritte der Physik-Progress of Physics 2004 ;52(6-7):472-476 10200 UI - 5290 AU - Bergshoeff E AU - Gran U AU - Linares R AU - Nielsen M AU - Ortin T AU - Roest D AD - Univ Groningen, Ctr Theoret Phys, NL-9747 AG Groningen, NetherlandsUniv London Kings Coll, Dept Math, London WC2R 2LS, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, SpainBergshoeff, E, Univ Groningen, Ctr Theoret Phys, Nijenborgh 4, NL-9747 AG Groningen, Netherlands TI - Gauged supergravities from Bianchi's group manifolds AB - We construct maximal D = 8 gauged supergravities by the reduction of D = I I supergravity over three-dimensional group manifolds. Such manifolds are classified into two classes, A and B, and eleven types. This Bianchi classification carries over to the gauged supergravities. The class A theories have 1/2 BPS domain wall solutions that uplift to purely gravitational solutions consisting of 7D Minkowski and a 4D Euclidean geometry. These geometries are generically singular. The two regular exceptions correspond to the near-horizon limit of the single- or double-centre Kaluza-Klein monopole. In contrast, the class B supergravities are defined by a set of equations of motion that cannot be integrated to an action and allow for no 1/2 BPS domain walls MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000221976800023 SO - Classical and Quantum Gravity 2004 ;21(10):S1501-S1507 10201 UI - 3330 AU - Berhault GD AU - Perez M AU - Camacho A AU - Fuentes S AU - Yacaman MJ AU - Mehta A AU - Chianelli RR AD - Inst Rech Catalyse, F-69100 Villeurbanne, FranceUniv Texas, Dept Chem, Austin, TX, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USACtr Ciencias Mat Condensada, Ensenada, Baja California, MexicoStanford Synchrotron Radiat Lab, Stanford, CA 94309, USAUniv Texas, Mat Res & Technol Inst, El Paso, TX 79968, USA TI - New perspectives about the role of cobalt in hydrodesulfurization catalysis MH - France MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223713800884 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U172-U172 10202 UI - 4786 AU - Berkove E AU - Juan-Pineda D AU - Lu Q AD - Lafayette Coll, Dept Math, Easton, PA 18042, USAInst Matemat, Morelia 58089, Michoacan, MexicoLehigh Univ, Dept Math, Bethlehem, PA 18015, USABerkove, E, Lafayette Coll, Dept Math, Easton, PA 18042, USA TI - Algebraic K-theory of mapping class groups AB - We show that the Fibered Isomorphism Conjecture of T. Farrell and L. Jones holds for various mapping class groups. In many cases, we explicitly calculate the lower algebraic K-groups, showing that they do not always vanish MH - Mexico|Michoacan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0920-3036 UR - ISI:000222679700002 L2 - configuration space;Farrell-Jones isomorphism conjecture;fixed point data;lower algebraic K-theory;mapping class group;strongly poly-free group SO - K-Theory 2004 ;32(1):83-100 10203 UI - 3516 AU - Berlanga-Ramirez EO AU - guilera-Granja F AU - Montejano-Carrizales JM AU - az-Ortiz A AU - Michaelian K AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoIPICYT, Ctr Nacl Supercomp, San Luis Potosi 78231, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor Atom & Opt, E-47011 Valladolid, SpainBerlanga-Ramirez, EO, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, Mexico TI - Magnetism in segregated bimetallic CoRh nanoclusters AB - The magnetic properties of free-standing ConRhm clusters (N = n + m approximate to 110 and n approximate to m) of three different symmetries: cubo-octahedral, icosahedral and HCP, were investigated in the segregated case. The initial geometrical structures constructed at Rh bulk distances were relaxed with a many-body Gupta potential to obtain the cluster geometries and energies. We find that the lowest energy is associated with the HCP structure. The relaxed interatomic distance for all the structures is slightly lower than the Rh bulk distance. The spin-polarized electronic structure and related magnetic properties of these optimized geometries were calculated by solving self-consistently a spd tightbinding Hamiltonian. The magnetic moment of the Rh atoms shows strong dependence on the position and environment, whereas the Co atoms show a smoother dependence. Results are compared with the experimental data and with other theoretical calculations available in the literature. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000226101400061 L2 - magnetic nanostructures;transition-metal clusters;electronic properties;tight-binding methods;MOMENTS; ALLOYS SO - Physica B-Condensed Matter 2004 ;354(1-4):278-281 10204 UI - 4799 AU - Berlanga-Ramirez EO AU - guilera-Granja F AU - Montejano-Carrizales JM AU - az-Ortiz A AU - Michaelian K AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoIPICyT, Ctr Nacl Supercomp, San Luis Potosi 78231, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainBerlanga-Ramirez, EO, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Structural and magnetic properties of CoRh nanoparticles AB - The structural and magnetic properties of free-standing ConRhm clusters (N=n+mapproximate to110 and napproximate tom) of three different symmetries-cubo-octahedral, icosahedral, and hcp-were investigated in two different chemical orders: segregated and alternated layering alloyed. The initial geometrical structures constructed at bulk distances were relaxed with a many-body Gupta potential to obtain the cluster geometries and energies. We find that the lowest energy in the different structures in all the cases corresponds to the segregated case (Rh-rich core surrounded by Co shells), and that the lowest energy is associated with the hcp structure. The interatomic distance for all the structures is slightly lower than the Rh bulk distance, in good agreement with the experimental observation , [ Zitoun , Phys. Rev. Lett. 89, 037203 (2002) ]. The spin-polarized electronic structure and related magnetic properties of these optimized geometries were calculated by solving self-consistently a spd tight-binding Hamiltonian. The magnetic moment of the Rh atoms shows a strong dependence on the position and environment, whereas the Co atoms show a smoother dependence. The magnetic moment of the Rh (Co) atoms in the alloying case are larger (lower) than the ones in the segregated case, however, the overall average for the segregated and alloying case are only slightly different for the different structures. The results are compared with the experimental data and with other theoretical calculations available in the literature MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000222996300057 L2 - ELECTRONIC-STRUCTURE; CIRCULAR-DICHROISM; TRANSITION-METALS; IRON CLUSTERS; MOMENTS; ALLOYS; NI; SYSTEMS; COBALT; RH SO - Physical Review B 2004 ;70(1): 10205 UI - 5678 AU - Berlanga-Ramirez EO AU - guilera-Granja F AU - az-Ortiz A AU - Rodriguez-Lopez JL AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoInst Potosino Invest Cient & Tecnol, San Luis Potosi 78231, SLP, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainBerlanga-Ramirez, EO, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, Mexico TI - Magnetism in small rhodium clusters under structural deformations AB - The effect of hydrostatic and axial deformations on the magnetic and electronic properties of small Rh clusters was studied. The electronic properties were calculated using a self-consistent spd tight-binding Hamiltonian within the unrestricted Hartree-Fock approximation. For hydrostatic deformations, the magnetic moment of the clusters increases with bond-length in a steplike fashion. On the other hand, axial distortions affect the magnetism of the clusters in a more complex manner that cannot always be related in a simple way to geometrical parameters. An analysis of the paramagnetic density of states is performed in order to elucidate the physical origin of our results. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500020 L2 - magnetic nanostructures;transition-metal clusters;electronic properties;tight-binding methods;COBALT SO - Journal of Alloys and Compounds 2004 ;369(1-2):81-83 10206 UI - 6377 AU - Berman GP AU - Borgonovi F AU - Izrailev FM AU - Smerzi A AD - Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USALos Alamos Natl Lab, CNLS, Los Alamos, NM 87545, USAUniv Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyIst Nazl Fis Nucl, Sez Pavia, Pavia, ItalyINFM, Unita Brescia, Brescia, ItalyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Trent, Dipartimento Fis, I-38050 Povo, ItalyUniv Trent, Ist Nazl Fis Mat, BEC CRS, I-38050 Povo, ItalyBerman, GP, Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USA TI - Irregular dynamics in a one-dimensional Bose system AB - We study many-body quantum dynamics of delta-interacting bosons confined in a one-dimensional ring. Main attention is paid to the transition from the mean-field to the Tonks-Girardeau regime using an approach developed in the theory of interacting particles. We analyze, both analytically and numerically, how the Shannon entropy of the wave function and the momentum distribution depend on time for weak and strong interactions. We show that the transition from regular (quasiperiodic) to irregular ("chaotic") dynamics coincides with the onset of the Tonks-Girardeau regime. In the latter regime, the momentum distribution of the system reveals a statistical relaxation to a steady state distribution. The transition can be observed experimentally by studying the interference fringes obtained after releasing the trap and letting the boson system expand ballistically MH - Italy MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000188392800004 L2 - IMPENETRABLE BOSONS; EINSTEIN CONDENSATE; GAS; TRANSITION; SUPERFLUID; INSULATOR; ATOMS SO - Physical Review Letters 2004 ;92(3): 10207 UI - 5511 AU - Bermudez-Humaran LG AU - Cortes-Perez NG AU - Le Loir Y AU - cocer-Gonzalez JM AU - Tamez-Guerra RS AU - de Oca-Luna RM AU - Langella P AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol & Virol, San Nicolas Garza, Nuevo Leon, MexicoLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - An inducible surface presentation system improves cellular immunity against human papillomavirus type 16 E7 antigen in mice after nasal administration with recombinant lactococci AB - Human papillomavirus type 16 (HPV-16) is the major causative agent of cervical cancer. To date, vaccine strategies against HPV-16 are based on the ability of the E7 oncoprotein to elicit an immune response against this virus. In this study, the use of an inducible or a constitutive system to produce the HPV-16 E7 protein in Lactococcus lactis, a non-pathogenic and non-invasive Gram-positive bacterium, was compared. The highest E7 production was obtained with the inducible system. When mice were immunized intranasally with recombinant lactococci expressing either inducible or constitutive E7, an antigen-specific cellular response (i.e. secretion of IL2 and IFN-gamma cytokines) was evoked and was substantially higher in mice receiving L. lactis expressing E7 with the inducible system. As bacterial antigen location may influence the immune response, recombinant L. lactis strains that produced E7 in three cellular locations, intracellular, secreted or cell-wall-anchored were evaluated. The highest immune response was elicited by administration of L. lactis producing an inducible cell-wall-anchored form of E7 protein. These promising results represent a step towards the development of a new, safe mucosal vector to treat HPV-related cervical cancer MH - France MH - Mexico|Nuevo Leon PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0022-2615 UR - ISI:000221456100012 L2 - LACTIC-ACID BACTERIA; CONTROLLED GENE-EXPRESSION; TOXIN FRAGMENT-C; PROTEIN; IMMUNIZATION; TETANUS; STREPTOCOCCI; ONCOPROTEIN; INTRANASAL; CYTOKINE SO - Journal of Medical Microbiology 2004 ;53(5):427-433 10208 UI - 5825 AU - Bermudez-Humaran LG AU - Langella P AU - Cortes-Perez NG AU - Gruss A AU - cocer-Gonzales JM AU - Tamez-Guerra RS AU - de Oca-Luna RM AU - Le Loir Y AD - INRA, Unite Rech Laitieres & Genet Appl, F-78352 Jouy En Josas, FranceUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Inmunol & Virol, Mexico City, DF, MexicoLangella, P, INRA, Unite Rech Laitieres & Genet Appl, Domaine Vilvert, F-78352 Jouy En Josas, France TI - Intranasal immunization in mice with recombinant lactococci expressing the interleukin-12 and the HPV-16 E7 antigen AB - Interleukin-12 (IL-12), a heterodimeric cytokine, plays an important role in cellular immunity against several bacterial, viral and parasitic infections, and has adjuvant activity when co-delivered with DNA vaccines, IL-12 has also been used with success in cancer immunotherapy treatments. However, systemic IL-12 therapy has been limited by high-level toxicity. Here, we describe the inducible expression and secretion of IL-12 performed in the food-grade model lactic acid bacterium (LAB), Lactococcus lactis, IL-12 was expressed as 2 separate polypeptides (p35-p40), or as a single recombinant polypeptide (scIL-12). Local administration of IL-12 producing strains at the intranasal mucosal surface resulted in an antigen-specific cellular response (i.e., secretion of Th1 cytokines, IL-2 and IFN-gamma) elicited by a recombinant L. lactis strain displaying a cell wall-anchored HPV-16 E7 antigen was dramatically increased by co-administration with an L. lactis strain secreting IL-12 protein. This work shows that IL-12 is produced and secreted in active form by L. lactis and that this strategy can be used successfully to enhance an antigen-specific immune response and to stimulate local mucosal immunity MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - French IS - 0023-7302 UR - ISI:000220542100022 L2 - Lactococcus lactis;IL-12;E7 antigen;IFN-gamma;adjuvant;CONTROLLED GENE-EXPRESSION; LACTIC-ACID BACTERIA; BACILLUS-SUBTILIS; PROTEIN SECRETION; GAMMA PRODUCTION; SUBSP LACTIS; IN-VIVO; IL-12; CYTOKINE; TOXICITY SO - Lait 2004 ;84(1-2):191-206 10209 UI - 5695 AU - Bermudez EC AU - Martinez NB AU - Graziano JV AU - Bernal HCA AU - Paniagua AH AD - Estac Expt Portoviejo, Inst Nacl Autonomo Invest Agropecuaria, Portoviejo, EcuadorColegio Postgrad, Inst Fitosanidad, Texcoco 56230, MexicoCtr Nacl Ref Control Biol, Tecoman 28120, MexicoBermudez, EC, Estac Expt Portoviejo, Inst Nacl Autonomo Invest Agropecuaria, Casilla Postal 100, Portoviejo, Ecuador TI - Phyllocnistis citrella (Lepidoptera : Gracillariidae) and its parasitoids in citrus in Ecuador AB - The objectives of this study were to determine the population fluctuations of the citrus leaf-miner, Phyllocnistis citrella, and its parasitoids in three locations of Ecuador, to identify and determine the geographic distribution of P. citrella parasitoids within Ecuador, and to establish which of eleven citrus species supported higher numbers of R citrella and its parasitoids. The highest population density of R citrella occurred during the dry season. The highest infestations in three localities were in Lodana (43.8%) in October, in Riochico (45.7%) in November, and in La Union (17.3%) in December. The greatest percentages of parasitism occurred in Lodana in March (60%), in Riochico in January (18.9%), and La Union in December (50%). The species Ageniaspis citricola Logvinovskaya, Galeopsomyia sp., and Elasmus tischeriae Howard were identified with 28.4, 2.2, and 0.07% parasitism, respectively. Although this is the first report of A. citricola in Ecuador, it is widely distributed in the main citrus producing zones of the country. Orange and grapefruit yielded higher numbers of citrus leafminers and their natural enemies than other citrus species MH - Ecuador MH - Mexico|Colima MH - Mexico|Estado De Mexico PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000220815900003 L2 - citrus leafminer;Phyllocnistis citrella;Gracillariidae;biological control SO - Florida Entomologist 2004 ;87(1):10-17 10210 UI - 4991 AU - Bernal-Garcia JM AU - Galicia-Luna LA AU - Ramos-Estrada M AU - Iglesias-Silva GA AD - Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato, MexicoInst Politecn Nacl, ESIQIE Grad, Mexico City 07738, DF, MexicoTexas A&M Univ, Chem Engn Dept, College Stn, TX 77843, USAInst Mexicano Petr, Mexico City 07330, DF, MexicoIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, CP 38010, Guanajuato, Mexico TI - Viscosities for aqueous solutions of N-methyldiethanolamine from 313.15 to 363.15 K AB - This paper presents liquid viscosities for seven binary mixtures of N-methyldiethanolamine + water over the entire composition range at atmospheric pressure for temperatures between 313.15 and 363.15 K. The work includes measurements of kinematic viscosities with three Cannon-Fenske viscosimeters. The viscosity deviations as a function of composition change sign from negative to positive in the water-rich region at 313.15 and 333.15 K. From 353.15 to 363.15 K, viscosity deviations are positive throughout the entire concentration range. A Redlich-Kister-type equation correlates the viscosity deviations MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000222535100022 L2 - BINARY-MIXTURES; CARBON-DIOXIDE; DENSITY; 2-AMINO-2-METHYL-1-PROPANOL; DIETHANOLAMINE; WATER; MONOETHANOLAMINE; ABSORPTION; BLENDS SO - Journal of Chemical and Engineering Data 2004 ;49(4):864-866 10211 UI - 3678 AU - Bersani D AU - Lottici PP AU - Rangel G AU - Ramos E AU - Pecchi G AU - Gomez R AU - Lopez T AD - Univ Parma, Dipartimento Fis, INFM, CNR, I-43100 Parma, ItalyUniv Guanajuato, CIQI, Guanajuato 36050, MexicoConcepcion Univ, Concepcion, ChileUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoBersani, D, Univ Parma, Dipartimento Fis, INFM, CNR, Parco Area Sci, I-43100 Parma, Italy TI - Micro-Raman study of indium doped zirconia obtained by sol-gel AB - Indium doped zirconia powders were prepared by sol-gel process, with different indium concentrations. The structural characterization was carried out by X-ray diffraction (XRD), micro Raman and N-2 adsorption at 77 K. The addition of indium stabilizes the tetragonal ZrO2 phase and influences the specific surface area. Rhodium salt impregnation on both indium doped and pure zirconia maintains the tetragonal phase at low temperatures. (C) 2004 Elsevier B.V. All rights reserved MH - Chile MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000225583200022 L2 - CATALYST SO - Journal of Non-Crystalline Solids 2004 ;345-46():116-119 10212 UI - 3793 AU - Bertaux N AU - Frauel Y AU - Refregier P AU - Javidi B AD - Domaine Univ St Jerome, Inst Fresnel, UMR 6133, Equipe TI, F-13397 Marseille, FranceUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City, DF, MexicoUniv Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269, USABertaux, N, Domaine Univ St Jerome, Inst Fresnel, UMR 6133, Equipe TI, F-13397 Marseille, France TI - Speckle removal using a maximum-likelihood technique with isoline gray-level regularization AB - We propose a method based on the maximum-likelihood technique for removing speckle patterns that plague coherent images. The proposed method is designed for images whose gray levels vary continuously in space. The image model is based on a lattice of nodes corresponding to vertices of triangles in which the gray level of each pixel is produced by linear interpolation. A constraint on isoline gray levels is introduced to regularize the solution. (C) 2004 Optical Society of America MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 1084-7529 UR - ISI:000225378200004 SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2004 ;21(12):2283-2291 10213 UI - 4782 AU - Bertone E AU - Buzzoni A AU - Chavez M AU - Rodriguez-Merino LH AD - Inst Nacl Astrofis Opt & Elect, Tonantzintla 72840, MexicoINAF, Osservatorio Astron Bologna, I-40127 Bologna, ItalyBertone, E, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1, Tonantzintla 72840, Mexico TI - Atlas versus NextGen model atmospheres: A combined analysis of synthetic spectral energy distributions AB - We carried out a critical appraisal of the two theoretical models, Kurucz' ATLAS9 and PHOENIX/NextGen, for stellar atmosphere synthesis. Our tests relied on the theoretical fit of spectral energy distributions (SEDs) for a sample of 334 target stars along the whole spectral-type sequence, from the classical optical catalogs of Gunn & Stryker and Jacoby et al. The best-fitting physical parameters (T-eff, log g) of stars allowed an independent calibration of the temperature and bolometric scale versus empirical classification parameters (i.e., spectral type and MK luminosity class); in addition, the comparison of the synthetic templates from the ATLAS and NextGen grids allowed us to probe the capability of the models to match spectrophotometric properties of real stars and assess the impact of the different input physics. We can sketch the following main conclusions of our analysis: ( 1) Fitting accuracy of both theoretical libraries drastically degrades at low T-eff at which both ATLAS and NextGen models still fail to properly account for the contribution of molecular features in the observed SED of K-M stars. ( 2) Compared with empirical calibrations, both ATLAS and NextGen fits tend, on average, to predict slightly warmer (by 4%-8%) T-eff for both giant and dwarf stars of fixed spectral type, but ATLAS provides, in general, a sensibly better fit (a factor of 2 lower sigma of flux residuals) than NextGen. ( 3) There is a striking tendency of NextGen to label target stars with an effective temperature and surface gravity higher than that of ATLAS. The effect is especially evident for MK I-III objects for which about one in four stars is clearly misclassified by NextGen in log g. This is a consequence of some "degeneracy'' in the solution space, partly induced by the different input physics and geometry constraints in the computation of the integrated emerging flux ( ATLAS model atmospheres assume standard plane-parallel layers, while NextGen adopts, for low-gravity stars, a spherical-shell geometry). A different T(tau) vertical structure of stellar atmosphere seems also required for NextGen synthetic SEDs in order to better account for limb-darkening effects in cool stars, as supported by the recent observations of the EROS BLG2000-5 microlensing event MH - Italy MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000223099600024 L2 - stars : atmospheres;stars : fundamental parameters;EFFECTIVE TEMPERATURE SCALE; LATE-TYPE STARS; GALACTIC METALLICITY GRADIENT; OLD STELLAR POPULATIONS; GIANT STARS; BOLOMETRIC CORRECTIONS; MAIN-SEQUENCE; OPEN CLUSTERS; F-TYPE; SPECTROPHOTOMETRIC ATLAS SO - Astronomical Journal 2004 ;128(2):829-841 10214 UI - 4938 AU - Bertozzi S AU - Gutierrez JP AU - Opuni M AU - Walker N AU - Schwartlander B AD - Natl Inst Publ Hlth, Div Hlth Econ & Policy, Cuernavaca, Morelos, MexicoCIDE, Ctr Res & Teaching Econ, Mexico City, DF, MexicoUniv Calif, Mexico Barkeley, CA, USAJohns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD 21205, USAUNAIDS, Joint United Nations Programme HIV AIDS, CH-1211 Geneva, SwitzerlandWHO, Dept HIV AIDS, CH-1211 Geneva, SwitzerlandGutierrez, JP, Natl Inst Publ Hlth, Div Hlth Econ & Policy, Univ 655, Cuernavaca, Morelos, Mexico TI - Estimating resource needs for HIV/AIDS health care services in low-income and middle-income countries AB - As funding mechanisms like the Global Fund for HIV/AIDS, Tuberculosis and Malaria increasingly make funding decisions on the basis of burden of disease estimates and financial need calculations, the importance of reliable and comparable estimating methods is growing. This paper presents a model for estimating HIV/AIDS health care resource needs in low- and middle-income countries. The model presented was the basis for the United Nations' call for US$ 9.2 billion to address HIV/AIDS in developing countries by 2005 with US$ 4.4 billion to address HIV/AIDS health care and the rest to deal with HIV/AIDS prevention. The model has since been updated and extended to produce estimates for 2007. This paper details the methods and assumptions used to estimate HIV/AIDS health care financial needs and it discusses the limitations and data needs for this model. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Switzerland MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Article AV - English IS - 0168-8510 UR - ISI:000222739700007 L2 - HIV;AIDS;health care;financing;economics;AIDS; SURVIVAL; ZIMBABWE; THERAPY; IMPACT; ADULTS; COSTS; HIV SO - Health Policy 2004 ;69(2):189-200 10215 UI - 4301 AU - Betancourt-Riera R AU - Betancourt R AU - Rosas R AU - Riera R AU - Marin JL AD - Sonoma State Univ, Dept Fis, Hermosillo 83000, Sonora, MexicoSonoma State Univ, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoUniv Oriente, Dept Biol, Santiago de Cuba, CubaRosas, R, Sonoma State Univ, Dept Fis, Apdo Postal 1626, Hermosillo 83000, Sonora, Mexico TI - One phonon resonant Raman scattering in quantum wires and free standing wires AB - We have developed a theory of one phonon resonant Raman scattering in a semiconductor quantum-well wire (QWW) and free standing wire (FSW) of cylindrical geometry. We present a complete description of the phonon modes of cylindrical structures embedded in another material, including a correct treatment of the mechanical and electrostatic matching conditions at the surface. We consider the Frohlich interaction for resonance Raman scattering. Electron states are considered confined within the QWW and the FSW. We also assume T = 0 K and single parabolic conduction and valence bands. The spectra are discussed for different laser energies and the selection rules for the processes are also studied. Singularities in the spectra are found and interpreted. (C) 2004 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000224076000013 L2 - Raman scattering;quantum wires;electron-phonon interaction;POLAR-OPTICAL OSCILLATIONS; GAAS ALAS SUPERLATTICES; SEMICONDUCTOR SUPERLATTICES; MODES; DOTS SO - Physica E-Low-Dimensional Systems & Nanostructures 2004 ;24(3-4):257-267 10216 UI - 5680 AU - Betancourt I AU - Davies HA AD - UNAM, Mat Res Inst, Mexico City 04510, DF, MexicoUniv Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandBetancourt, I, UNAM, Mat Res Inst, POB 70-360, Mexico City 04510, DF, Mexico TI - Enhanced magnetic properties in Zr-containing rare earth-rich Didymium (Nd/Pr)-based nanocrystalline hard magnetic alloys AB - A systematic study of the influence of processing conditions and Zr addition on the magnetic properties of RE-rich, Didymium (Nd/Pr)(14)Fe80B6 (Nd:Pr ratio of 3:1) is reported. For directly quenched alloys, various roll speeds resulted in grain sizes d(g) within the range 35-50 nm. Increasing remanence J(r) and maximum energy product (BH)(max) values were observed as d(g) decreased (up to 0.86T and up to 124 kJ/m(3), respectively). Small Zr addition (1 at.%) resulted in improved J(r) and (BH)(max) (up to 0.92 T and up to 142 kJ/m(3), respectively). For overquenched and annealed alloys, partial substitution of Fe by Zr (0-4 at.%) indicated a marked dependence of the magnetic properties on Zr content, with an excellent combination of J(r), (1.0 T), H-i(c) (1574 kA/m) and (BH)(max) (149 kJ/m(3)) at 2 at.% Zr. Results are interpreted in terms of variations in the scale of the nanostructure and of the effects of Zr substitutions into the 2/14/1 unit cell. (C) 2003 Published by Elsevier B.V MH - United Kingdom MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500038 L2 - permanent magnets;magnetic measurements SO - Journal of Alloys and Compounds 2004 ;369(1-2):152-154 10217 UI - 6050 AU - Bialek R AU - Kern J AU - Herrmann T AU - Tijerina R AU - Cecenas L AU - Reischl U AU - Gonzalez GM AD - Univ Hosp Tubingen, Inst Trop Med, Tubingen, GermanyUniv Regensburg, Inst Med Microbiol, D-8400 Regensburg, GermanyUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Fac Med, Dept Patol, Monterrey, Nuevo Leon, MexicoBialek, R, Univ Klinikum Tubingen, Inst Tropenmed, Keplerstr 15, D-72074 Tubingen, Germany TI - PCR assays for identification of Coccidioides posadasii based on the nucleotide sequence of the antigen 2/proline-Rich antigen AB - A conventional nested PCR and a real-time LightCycler PCR assay for detection of Coccidioides posadasii DNA were designed and tested in 120 clinical strains. These had been isolated from 114 patients within 10 years in Monterrey, Nuevo Leon, Mexico, known to be endemic for coccidioidomycosis. The gene encoding the specific antigen 2/proline-rich antigen (Ag2/PRA) was used as a target. All strains were correctly identified, whereas DNA from related members of the family Onygenaceae remained negative. Melting curve analysis by LightCycler and sequencing of the 526-bp product of the first PCR demonstrated either 100% identity to the GenBank sequence of the Silveira strain, now known to be C. posadasii (accession number AF013256), or a single silent mutation at position 1228. Length determination of two microsatellite-containing loci (GAC and 621) identified all 120 isolates as C. posadasii. Specific DNA was amplified by conventional nested PCR from three microscopically spherule-positive paraffin-embedded tissue samples, whereas 20 human tissue samples positive for other dimorphic fungi remained negative. Additionally, the safety of each step of a modified commercially available DNA extraction procedure was evaluated by using 10 strains. At least three steps of the protocol were demonstrated to sufficiently kill arthroconidia. This safe procedure is applicable to cultures and to clinical specimens MH - Germany MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 19 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000189379000048 L2 - IMMITIS; EXPRESSION; DIAGNOSIS; CULTURES; CLONING; TISSUE; RANGE; GENE; DNA SO - Journal of Clinical Microbiology 2004 ;42(2):778-783 10218 UI - 3624 AU - Bijker R AU - Giannini MM AU - Santopinto E AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoIst Nazl Fis Nucl, Sez Genova, Dipartimento Fis, I-16164 Genoa, ItalyBijker, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Spectroscopy of pentaquark states AB - We construct a complete classification of qqqq (q) over bar pentaquark states in terms of' the spin-flavour SU(6) representations. We find that only sonic definite SU(3) representations are allowed. that is singlets, octects. decuplets. ariti-decuplets, 27-plets and 35-plets. The latter three contain exotic states, which cannot be constructed from three quarks only. This complete classification is general and model independent and is useful both for model builders and experimentalists. The mass spectrum is obtained from a Gursey-Radicati type mass formula. whose coefficients have been determined previously by a study of qqq-baryons. The ground-state pentaquark, which is identified with the recently observed Theta(+)(1540) state, is predicted to be an isosinglet anti-decuplet state. Its parity depends on the interplay between the spin-flavour and orbital contributions to the mass operator MH - Italy MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000225820800016 L2 - CONSTITUENT QUARK-MODEL; POSITIVE-STRANGENESS; CHIRAL SOLITON; SKYRME MODEL; LARGE-N; BARYON; THETA(+); RESONANCE; QCD; PHOTOPRODUCTION SO - European Physical Journal A 2004 ;22(2):319-329 10219 UI - 4744 AU - Bijker R AU - Giannini MM AU - Santopinto E AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Genoa, Ist Nazl Fis Nucl, Dipartimento Fis, Sez Genova, I-16164 Genoa, ItalyBijker, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Magnetic moments of antidecuplet pentaquarks AB - We analyze the magnetic moments of the exotic pentaquarks of the flavor antidecuplet in the constituent quark model for the cases in which the ground state is in an orbital L-p = 0(+) or a L-p = 1(-) state. We derive a set of sum rules for the magnetic moments of antidecuplet baryons and their relation with the magnetic moments of decuplet and octet baryons. The magnetic moment of the Theta(+)(1540) is found to be 0.38, 0.09 and 1.05 muN for J(p) = 1/2(-), 1/2(+) and 3/2(+), respectively, which is compared with the results obtained in other approaches. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000223143300035 L2 - antidecuplet baryons;magnetic moments;constituent quark model;CONSTITUENT QUARK-MODEL; POSITIVE-STRANGENESS; BARYON STATE; PARITY; THETA(+); PHOTOPRODUCTION; COLLISIONS; RESONANCE; DECUPLET; SYMMETRY SO - Physics Letters B 2004 ;595():260-268 10220 UI - 5029 AU - Bijker R AU - Iachello F AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, Ctr Theoret Phys, Sloane Phys Lab, New Haven, CT 06520, USABijker, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Reanalysis of the nucleon spacelike and timelike electromagnetic form factors in a two-component model AB - Recent experimental data on spacelike and timelike form factors of the nucleon are analyzed in terms of a two-component model with a quarklike intrinsic q(3) structure and q (q) over bar pairs MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 30 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000222391000074 L2 - MOMENTUM-TRANSFER; QUANTUM CHROMODYNAMICS; POLARIZATION TRANSFER; EXCLUSIVE PROCESSES; NEUTRON; PROTON; REGION; (GEV/C)(2); SCATTERING; Q(2)=1.75 SO - Physical Review C 2004 ;69(6): 10221 UI - 4942 AU - bildox-Alvarado E AU - Rodrigues JN AU - Gioielli LA AU - Toro-Vazquez JF AU - Marangoni AG AD - Univ Guelph, Dept Food Sci, Guelph, ON N1G 2W1, CanadaUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, MexicoUniv Sao Paulo, Fac Pharmaceut Sci, BR-05508900 Sao Paulo, BrazilMarangoni, AG, Univ Guelph, Dept Food Sci, Guelph, ON N1G 2W1, Canada TI - Effects of crystalline microstructure on oil migration in a semisolid fat matrix AB - Oil migration from a 60:40 (w/w) mixture of peanut oil and chemically interesterified and hydrogenated palm oil (IHPO) was a strong function of the cooling rate experienced by the fat mixture during crystallization, namely, 0.4, 1.2, and 6.0 degreesC/min. The relative oil loss determined gravimetrically was inversely proportional to the cooling rate. Oil loss was also inversely related to the storage modulus (G') and the yield force of the fat. After 1 day storage at 20 degreesC, the start of the oil loss studies, the composition and polymorphism of the fat crystals crystallized at different rates were similar, as judged by differential scanning calorimetry and powder X-ray diffraction. Crystals were in the same beta' modification and had similar peak melting temperatures. Microstructure, on the other hand, was profoundly affected by the cooling rate: average crystal size decreased from 8.2 mum (at 0.4 degreesC/min) to 3.9 mum (at 6.0 degreesC/min). Using Darcy's Law, it was possible to calculate permeability coefficients using the structural parameters obtained in this work. Decreases in permeability coefficient as a function of increasing cooling rate were mainly related to decreases in crystal size MH - Brazil MH - Canada MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Multidisciplinary;Crystallography;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1528-7483 UR - ISI:000222553800016 L2 - NETWORKS SO - Crystal Growth & Design 2004 ;4(4):731-736 10222 UI - 5556 AU - Bindi D AU - Castro RR AU - Franceschina G AU - Luzi L AU - Pacor F AD - Ist Nazl Geofis & Vulcanol, Sez Milano, I-20133 Milan, ItalyCICESE, Div Ciencias Tierra, Dept Sismol, Ensenada 22860, Baja California, MexicoBindi, D, Ist Nazl Geofis & Vulcanol, Sez Milano, Via Bassini 15, I-20133 Milan, Italy TI - The 1997-1998 Umbria-Marche sequence (central Italy): Source, path, and site effects estimated from strong motion data recorded in the epicentral area AB - [1] We apply a nonparametric spectral inversion scheme to calculate source spectra, S wave attenuation, and site transfer functions from strong motion records in the epicentral region of the 1997-1998 Umbria-Marche seismic sequence (central Italy). We use records from moderate size earthquakes (4.6 less than or equal to M-1 less than or equal to 5.9) to parameterize the spectral amplitude decay in the distance range from 5 to 40 km. We find that the average quality factor Q can be approximated by Q( f ) = 49 f(0.9), between 0.5 and 8 Hz, and the geometrical spreading by r(-0.9). At high frequencies ( f > 8 Hz) the dependence of Q on frequency weakens, and it takes an approximate constant value of 318. We fit the source spectra to the omega-square model and calculate an average stress drop of (2 +/- 1) MPa. The average value is consistent with the previous estimates from the weak events (1.4 < M-1 < 4.5) of the Umbria-Marche seismic sequence. The most remarkable site effects are found in correspondence of large sedimentary basins, filled by alternation of sandy-clayey deposits. The estimated spectral parameters are used to simulate acceleration spectra recorded during several earthquakes of the Umbria-Marche sequence. Both point source and finite fault effects are considered. Furthermore, attenuation relationships for peak ground velocity and ground acceleration are estimated using synthetic data, and compared to existing relationships MH - Italy MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000221325800003 L2 - generalized inversion;strong motion;seismic attenuation;source parameters;Umbria-Marche;EASTERN NORTH-AMERICA; SEPTEMBER-OCTOBER 1997; STRONG GROUND MOTIONS; EARTHQUAKE SEQUENCE; CENTRAL APENNINES; STOCHASTIC SIMULATION; SOUTHERN-CALIFORNIA; SOURCE PARAMETERS; SOURCE SPECTRA; SHEAR-WAVES SO - Journal of Geophysical Research-Solid Earth 2004 ;109(B4): 10223 UI - 4207 AU - Bischoff JL AU - Israde-Alcantara I AU - Garduno-Monroy VH AU - Shanks WC AD - US Geol Survey, Menlo Pk, CA 94025, USAUniv Michoacana, Dept Geol, Morelia, Michoacan, MexicoUS Geol Survey, Denver, CO 80225, USABischoff, JL, US Geol Survey, MS910,345 Middlefield Rd, Menlo Pk, CA 94025 USA TI - The springs of Lake Patzcuaro: chemistry, salt-balance, and implications for the water balance of the lake AB - Lake Patzcuaro, the center of the ancient Tarascan civilization located in the Mexican altiplano west of the city of Morelia, has neither river input nor outflow. The relatively constant lake-salinity over the past centuries indicates the lake is in chemical steady state. Springs of the south shore constitute the primary visible input to the lake, so influx and discharge must be via sub-lacustrine ground water. The authors report on the chemistry and stable isotope composition of the springs, deeming them representative of ground-water input. The springs are dominated by Ca, Mg and Na, whereas the lake is dominated by Na. Combining these results with previously published precipitation/rainfall measurements on the lake, the authors calculate the chemical evolution from spring water to lake water, and also calculate a salt balance of the ground-water-lake system. Comparing Cl and delta(18)O compositions in the springs and lake water indicates that 75-80% of the spring water is lost evaporatively during evolution toward lake composition. During evaporation Ca and Mg are lost from the water by carbonate precipitation. Each liter of spring water discharging into the lake precipitates about 18.7 mg of CaCO3. Salt balance calculations indicate that ground water input to the lake is 85.9 x 10(6) m(3)/a and ground water discharge from the lake is 23.0 x 10(6) m(3)/a. Thus, the discharge is about 27% of the input, with the rest balanced by evaporation. A calculation of time to reach steady-state ab initio indicates that the Cl concentration of the present day lake would be reached in about 150 a. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Michoacan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0883-2927 UR - ISI:000224438500012 L2 - MEXICO; MICHOACAN; EXCHANGE SO - Applied Geochemistry 2004 ;19(11):1827-1835 10224 UI - 5015 AU - Biswas A AU - Creighton C AU - Soderbaum P AU - Tropp H AD - Third World Ctr Water Management, Mexico City 52958, DF, MexicoNatl Land & Water Resources Audit, Turner, ACT 2612, AustraliaUNDP, New York, NY 10017, USABiswas, A, Third World Ctr Water Management, Avenida Manantial Oriente 27, Mexico City 52958, DF, Mexico TI - Workshop 2a (synthesis): linking drainage basin management to local action plans and policy AB - The complexity of linking drainage basin management to local action plans and policy has been largely underestimated by the water profession. Water management issues may be similar between areas but solutions are not universal - they must be specific to each local context. A particular problem is that a drainage basin is likely to cover a number of administrative and/or political boundaries MH - Australia MH - Mexico|Distrito Federal MH - USA PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000222401100020 L2 - drainage basin management;institutional and legal frameworks;integration;local action plans;national policy SO - Water Science and Technology 2004 ;49(7):103-105 10225 UI - 6341 AU - Bivian-Castro EY AU - Cervantes-Lee F AU - Mendoza-Diaz G AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAMendoza-Diaz, G, Univ Guanajuato, Fac Quim, Noria Alta S-N, Guanajuato 36050, Mexico TI - Synthesis, characterization and crystal structure of copper(II) ternary complex with cinoxacin and histamine AB - In order to enhance the knowledge of how quinolones may exert their antibacterial action, the synthesis of a new copper(II) mixed ligand, containing histamine complex was carried out. Crystal structure of [Cu(hsm)(cnx)NO3]H2O shows that Cu(II) cation displays a distorted square pyramidal geometry. Cinoxacinate (cnx) acts as bidentate ligand bonded to the Cu(II) ion through the oxygen atoms of the 3-carboxylate and 4-keto groups and histamine (hsm) is coordinated by the aliphatic amino group and the non protonated nitrogen of imidazole. Molar conductivity, elemental analysis, infrared and electronic spectroscopy have been used to characterize the complex. The results here reported indicate that cnx coordination mode is similar to that found in other complexes reported previously, being only found that metal-ligand distances are slightly different because the asymmetry of the coordination environment. This result also, may support the hypothesis that the mechanism of action of quinolones could be through a copper(II) complex carrier with imidazole ligands in their coordination environment. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000188715300001 L2 - histamine;cinoxacin;copper complexes;quinolones;MIXED-LIGAND COMPLEXES; N-N DONORS; NALIDIXIC-ACID; DNA GYRASE; DRUGS SO - Inorganica Chimica Acta 2004 ;357(2):349-353 10226 UI - 3547 AU - Bjornstad A AU - Gronnerod S AU - Key JM AU - Tekauz A AU - Crossa J AU - Martens H AD - Agr Univ Norway, Dept Plant & Environm Sci, N-1432 As, NorwaySwedish Univ Agr Sci, Dept Plant Breeding Res, Uppsala, SwedenAgr Canada, Cereal Res Ctr, Winnipeg, MB, CanadaCIMMYT, Mexico City 06600, DF, MexicoMatforsk, Ctr Integrat Genet, As, NorwayBjornstad, A, Agr Univ Norway, Dept Plant & Environm Sci, N-1432 As, Norway TI - Resistance to barley scald (Rhynchospowium secalis) in the Ethiopian donor lines 'Steudelli' and 'Jet', analyzed by partial least squares regression and interval mapping AB - The resistance of barley (Hordeum vulgare L.) to Rhynchosporium secalis (scald) has been investigated in two crosses between the susceptible cv. `Ingrid' and two resistant Ethiopian landraces, `Steudelli' and `Jet'. Doubled haploids were inoculated in replicated tests using two isolates of R. secalis, `4004' and `WRS1872'. Expression of resistance differed widely between replicated tests. AFLP, SSR and RFLP markers were used to develop chromosome maps. Results have been analysed using partial least squares regression (PLSR) and interval mapping. In PLSR the major covariance structures or `latent variables' between X (markers) and Y (isolates, tests) are modelled as principal components and their optimal number determined by cross-validation. In `Steudelli' two QTL were detected, one on each of chromosomes 3H and 7H, in 4 out of 5 tests, while in `Jet' only one (different) allele at the 3H locus was found. The validated R-2 varied between 11.0% and 64.9% in the replicated tests with `4004'. With isolate `WRS1872' the 7H locus and another 3H locus were detected. By interval mapping the QTL detected were less stable and generally gave lower R-2 values than PLSR. PLSR does not depend on maps, but interval mapping based on values predicted by PLSR had R-2 around 90%. It is suggested that PLSR may be a useful tool in QTL analysis MH - Canada MH - Mexico|Distrito Federal MH - Norway MH - Sweden PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-0661 UR - ISI:000226107900009 L2 - QUANTITATIVE TRAIT LOCI; NEAR-ISOGENIC LINES; HORDEUM-VULGARE L; LINKAGE MAP; RFLP MAP; MARKERS; GENE; CONSTRUCTION; IDENTIFICATION; POPULATIONS SO - Hereditas 2004 ;141(2):166-179 10227 UI - 6192 AU - Blanchon P AU - Perry CT AD - Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Reef Syst Unit, Cancun 77500, Q Roo, MexicoManchester Metropolitan Univ, Dept Geog & Environm Sci, Environm Sedimentol Res Grp, Manchester M1 5GD, Lancs, EnglandBlanchon, P, Natl Autonomous Univ Mexico, Inst Marine Sci & Limnol, Reef Syst Unit, Ap 1152, Cancun 77500, Q Roo, Mexico TI - Taphonomic differentiation of Acropora palmata facies in cores from Campeche Bank Reefs, Gulf of Mexico AB - A common assumption in the geological analysis of modern reefs is that coral community zonation seen on the surface should also be found in cores from the reef interior. Such assumptions not only underestimate the impact of tropical storms on reef facies development, but have been difficult to test because of restrictions imposed by narrow-diameter cores and poor recovery. That assumption is tested here using large-diameter cores recovered from a range of common zones across three Campeche Bank reefs. It is found that cores from the reef-front, crest, flat and rubble-cay zones are similar in texture and coral composition, making it impossible to recognize coral assemblages that reflect the surface zonation. Taphonomic signatures imparted by variations in encrustation, bioerosion and cementation, however, produce distinct facies and delineate a clear depth zonation. Cores from the reef-front zone (2-10 m depth) are characterized by sections of Acropora palmata cobble gravel interspersed with sections of in-place (but truncated) A. palmata stumps. Upper surfaces of truncated colonies are intensely bioeroded by traces of Entobia isp. and Gastrochaenolites isp. and encrusted by mm-thick crustose corallines before colony regeneration and, therefore, indicate punctuated growth resulting from a hurricane-induced cycle of destruction and regeneration. Cores from the reef crest/flat (0-2 m depth) are also characterized by sections of hurricane-derived A. palmata cobble-gravels as well as in-place A. palmata colonies. In contrast to the reef front, however, these cobble gravels are encrusted by cm-thick crusts of intergrown coralline algae, low-relief Homotrema and vermetids, bored by traces of Entobia isp. and Trypanites isp. and coated by a dense, peloidal, micrite cement. Cores from the inter- to supratidal rubble-cay zone (+0-5 m) are only composed of A. palmata cobble gravels and, although clasts show evidence of subtidal encrustation and bioerosion, these always represent processes that occurred before deposition on the cay. Instead, these gravels are distinguished on the basis of their limited bioerosion and marine cements, which exhibit fabrics formed in the intertidal zone. These results confirm that hurricanes have a major influence on facies development in Campeche Bank reefs. Instead of reflecting the surface coral zonation, each facies records a distinctive, depth-related set of taphonomic processes, which reflect colonization, alteration and stabilization following the production of new substrates by hurricanes MH - United Kingdom MH - Mexico|Quintana Roo PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Geology U5 - J;Review AV - English IS - 0037-0746 UR - ISI:000189022900004 L2 - hurricanes;reef crest;reef front;rubble rampart;sea level;taphofacies;STATES-VIRGIN-ISLANDS; SEA-LEVEL CHANGES; SHELF-EDGE-REEF; PLEISTOCENE CORAL-REEFS; GREAT-BARRIER-REEF; GRAND-CAYMAN; COMMUNITY STRUCTURE; FRINGING-REEF; HOLOCENE REEF; ST-CROIX SO - Sedimentology 2004 ;51(1):53-76 10228 UI - 5991 AU - Blanckaert I AU - Swennen RL AU - Flores MP AU - Lopez RR AU - Saade RL AD - Univ Nacl Autonoma Mexico, FES Iztacala, UBIPRO, Lab Recursos Nat, Mexico City 54090, DF, MexicoKatholieke Univ Leuven, Fac Agr & Appl Biol Sci, Lab Trop Crop Improvement, B-3001 Louvain, BelgiumSaade, RL, Univ Nacl Autonoma Mexico, FES Iztacala, UBIPRO, Lab Recursos Nat, Av Barrio 1, Mexico City 54090, DF, Mexico TI - Floristic composition, plant uses and management practices in homegardens of San Rafael Coxcatlan, Valley of Tehuacan-Cuicatlan, Mexico AB - Homegardens preserve much of the local cultural history and reveal information about plant management decisions by individual holders. A survey was conducted in the homegardens of San Rafael Coxcatlan, a rural village in the semi-arid valley of Tehuacan-Cuicatlan, Mexico. Two hundred and thirty three different plant species were collected in 30 studied homegardens. 65.7% were ornamental, 29.6% edible and 8.6% were medicinal. Sixty eight percent of the plants were cultivated, while 22% were spared and 10% protected. The results confirm that homegardens are rich in biodiversity and are interesting for ethnobotanical research. Moreover, they need to be considered for in situ conservation and development programs in future. (C) 2003 Elsevier Ltd. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000220181600003 L2 - biodiversity;ethnobotany;in situ conservation;quantitative analysis;rural development;semi-arid;GARDENS; MIXTEC SO - Journal of Arid Environments 2004 ;57(2):179-202 10229 UI - 5477 AU - Blanco-Cano X AU - Omidi N AU - Russel CT AD - UNAM, Inst Geofis, Mexico City, DF, MexicoUCSD, Dept Elect Comp Engn, San Diego, CA, USAUCSD, Calif Space Inst, San Diego, CA, USAIGPP UCLA, Los Angeles, CA, USABlanco-Cano, X, UNAM, Inst Geofis, Mexico City, DF, Mexico TI - How to make a magnetosphere AB - On its journey from the Sun, the solar wind encounters bodies with various magnetic field strengths. The stronger planetary magnetic fields create a cavity or magnetosphere in the solar wind that greatly exceeds the scale lengths of the gyrating ions and exhibits self-similar behaviour. The weaker magnetic fields, associated with smaller bodies, create a spectrum of disturbances that differ from the planetary magnetospheres and in which ion scales are important. Global numerical simulations that resolve the ion motion enable us to examine the evolution of these disturbances from simple wakes to complex systems with features very similar to planetary magnetospheres. Examining this hierachy provides insight into the formation of planetary magnetospheres, including the origin of such features as the magnetotail, plasma sheet, magnetopause, magnetosheath, bow shock and trapped radiation belts MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Geochemistry & Geophysics U5 - J;Article AV - English IS - 1366-8781 UR - ISI:000221545500011 L2 - SOLAR-WIND; MAGNETIC-FIELD; SIMULATIONS; ASTEROIDS SO - Astronomy & Geophysics 2004 ;45(3):14-17 10230 UI - 5523 AU - Blanco-Centurion C AU - Gerashchenko D AU - Salin-Pascual RJ AU - Shiromani PJ AD - Vet Adm Med Ctr W Roxbury, W Roxbury, MA 02132, USAHarvard Univ, Sch Med, W Roxbury, MA 02132, USAUniv Nacl Autonoma Mexico, Fac Med, Dept Physiol, Mexico City 04510, DF, MexicoShiromani, PJ, Vet Adm Med Ctr W Roxbury, 1400 VFW Pkwy, W Roxbury, MA 02132 USA TI - Effects of hypocretin2-saporin and antidopamine-beta-hydroxylase-saporin neurotoxic lesions of the dorsolateral pons on sleep and muscle tone AB - The hypocretin neurons have been implicated in regulating sleep-wake states as they are lost in patients with the sleep disorder narcolepsy. Hypocretin (HCRT) neurons are located only in the perifornical region of the posterior hypothalamus and heavily innervate pontine brainstem neurons, such as the locus coeruleus (LC), which have traditionally been implicated in promoting arousal. It is not known how the hypocretin innervation of the pons regulates sleep-wake states as pontine lesions have never been shown to increase sleep. It is likely that in previous studies specific neurons were not lesioned. Therefore, in this study, we applied saporin-based neurotoxins to the dorsolateral pons and monitored sleep in rats. Anti-dopamine-beta-hydroxylase-saporin killed the LC neurons but sleep was affected only during a two hour light-dark transition period. Application of hypocretin2-saporin killed fewer LC neurons relative to other adjacent neurons. This occurred because the LC neurons possess the hypocretin receptor 1 but the ligand hypocretin 2 binds to this receptor with less affinity relative to the hypocretin receptor 2. The hypocretin2-saporin lesioned rats compared to controls had increased sleep during the dark period and displayed increased limb movements during REM sleep. None of the lesioned rats had sleep onset REM sleep periods or cataplexy. We conclude that the hypocretin innervation to the pons functions to awaken the animal when the lights turn off (via its innervation of the LC), sustains arousal and represses sleep during the rest of the night (via a wider innervation of other pontine neurons), and modulates muscle tone MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000221491600014 L2 - locus coeruleus;narcolepsy;NREMS;orexin;rat;REMS;EYE-MOVEMENT SLEEP; GIGANTOCELLULAR TEGMENTAL FIELD; PONTINE RETICULAR-FORMATION; OREXIN-A LEVELS; REM-SLEEP; PARADOXICAL SLEEP; POSTERIOR HYPOTHALAMUS; BEHAVIOR DISORDER; WAKING CYCLE; RAT SO - European Journal of Neuroscience 2004 ;19(10):2741-2752 10231 UI - 6079 AU - Blanco-Lezcano L AU - Rocha-Arrieta LL AU - Martinez-Marti L AU - varez-Gonzalez L AU - Pavon-Fuentes N AU - ias-Gonzalez R AU - Serrano-Sanchez T AU - Rosillo-Marti JC AU - de Peralta YCG AU - Bauza-Calderin Y AU - Briones M AD - CIREN, Clin Trastornos Movimiento & Enfermedad Parkinson, Area Bas, Havana, CubaCINVESTAV, Dept Farmacobiol, Mexico City, DF, MexicoInst Nacl Psiquitatria Ramon Fuente, Mexico City, DF, MexicoBlanco-Lezcano, L, CIREN, Clin Trastornos Movimiento & Enfermedad Parkinson, Area Bas, Avda 25,15805,158 & 160, Havana, Cuba TI - Lesions in the pars compacta substantiae nigrae and the subthalamic nucleus modify the density of muscarinic receptors in different nuclei of the basal ganglia AB - Introduction. Several studies that has focused to the dopaminergic transmission in the basal ganglia in parkinsonian condition, but only a few article has taking into account the imbalance between dopaminergic and cholinergic transmission. Objective. To evaluate the muscarinic cholinergic receptors density in SNc and PPN in the 6-OHDA model. Materials and methods. Were organized five experimental groups in correspondence to the place of the lesion: L Non treated rats, II. 6-OHDA lesion in SNc, III. 6-OHDA lesion in SNc + quinolinic acid lesion in NST, IV. Sham operated rats, V. Quinolinic acid in STN. Were obtained coronal sections of 20 mum thickness of SNc and PPN from rats and in these sections was evaluated the muscarinic receptors density through autoradiographic technique with [3H] quinuclidinylbenzilate (QNB) (1.23 nM). The muscarinic antagonist atropine (1 muM) was utilized as non-specific union. The density was evaluated in both hemispheres and the density optical was converted in fentomolas/mg of tissue with base to values obtained from tritium standards. Results. Significant diminution of the muscarinic receptors density was found in the SNc ipsilateral to the 6-OHDA lesion from experimental groups II (t = 2.76; p < 0.05) (and III (t = 4.06; p < 0.05). In the group V, was seen a significant increase of muscarinic receptor density in the SNc ipsilateral to the 6-OHDA lesion. The comparison between experimental groups evidenced significant differences among them (F = 13.13; p < 0.001) with a significant decrease in the density from SNc of groups II and III and significant increase in the density from SNc of group V in comparison of the others groups. In relation to PPN, muscarinic receptors density from right PPN ipsilateral to the 6-OHDA lesion, shown significant differences (F = 3.93; p < 0.01) between the experimental groups with a significant increase of this variable in the group H. Conclusions. These results signal a modification of cholinergic activity after 6-OHDA lesion. The changes in the muscarinic receptors populations located in SNc and PPN could be part of different compensatory mechanisms to attempt ameliorate the imbalance between dopaminergic and cholinergic transmission that it was installed after denervation of nigrostriatal-forebrain bundle. The excitotoxic lesion of STN impose a new adjust mechanism for cell from PPN, which could be expressed in the changes of muscarinic cholinergic receptors population at the level of SNc MH - Cuba MH - Mexico|Distrito Federal PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000189005600006 L2 - autorradiography;muscarinic receptors;NST;PPN;SNc;6-OHDA;PEDUNCULOPONTINE TEGMENTAL NUCLEUS; PARKINSONS-DISEASE; STRIATAL DOPAMINE; RAT-BRAIN; 6-HYDROXYDOPAMINE LESIONS; MESOPONTINE TEGMENTUM; NEURONS; STIMULATION; GLUTAMATE; ACETYLCHOLINE SO - Revista de Neurologia 2004 ;38(2):128-132 10232 UI - 2617 AU - Blank M AU - Shani A AU - Goldberg I AU - Kopolovic J AU - Amigo MC AU - Magrini L AU - Shoenfeld Y AD - Chaim Sheba Med Ctr, Dept Med B, IL-52621 Tel Hashomer, IsraelChaim Sheba Med Ctr, Ctr Autoimmune Dis, IL-52621 Tel Hashomer, IsraelTel Aviv Univ, Sackler Fac Med, IL-52621 Tel Hashomer, IsraelChaim Sheba Med Ctr, Dept Pathol, IL-52621 Tel Hashomer, IsraelInst Nacl Cardiol Ignacio Chavez, Dept Rheumatol, Mexico City, DF, MexicoUniv Roma La Sapienza, Dept Clin & Therapeut Appl Med, Rome, ItalyTel Aviv Univ, Laura Schwarz Kipp Chair Autoimmun, IL-69978 Tel Aviv, IsraelShoenfeld, Y, Chaim Sheba Med Ctr, Dept Med B, IL-52621 Tel Hashomer, Israel TI - Libman-Sacks endocarditis associated with antiphospholipid syndrome and infection AB - Introduction: Anti phospholipid syndrome (APS) is a systemic autoimmune disease, associated not only with a hypercoagulable state and recurrent fetal loss but with many diverse clinical manifestations including heart involvement, neurological manifestations, as well as skin, kidney and hematologic abnormalities. Cardiac manifestations include coronary by-pass graft and angioplasty occlusions, cardiomyopathy, cyanotic congenital heart disease, intracardiac thrombus and complications of cardiovascular surgery. The valvular heart disease was defined as Libman-Sacks nonbacterial endocarditis. Previously, we have shown a linear subendothelial deposition of anti-cardiotipin/beta(2) glycoprotein I (beta 2GPI) antibodies in the valve specimens derived from APS patients. The involvement of complement C3c in the pathogenesis was documented. We assessed the beta 2GPI-related target epitope recognized by the anti-beta 2GPI Abs on the valves. Materials and methods: In order to find the beta 2GPI-retated target epitopes recognized by the anti-beta 2GPI antibodies on the valves, we used beta 2GPI-related synthetic peptides. The presence of anti-beta 2GPI Abs on the studied valves was detected by anti-idiotypic antibody, followed by immunoperoxidase analysis. Biotin attached to the N-terminal of beta 2GPI-related synthetic peptides and control peptide were used to identify the epitope addressed by the anti-beta 2GPI Abs deposited on the patient's valve. The binding was probed by streptavidin-peroxidase and appropriate substrate. The specificity was confirmed by competition assays with control peptide and anti-idiotypic antibody. Results: Among the beta 2GPI-retated synthetic peptides, two peptides were found in previous studies to mimic common pathogens either bacteriae or viruses, which raised a possible infectious origin for APS. One of these peptides, TLRVYK, is a specific target for anti-beta 2GPI Abs deposited on the APS valves. This synthetic peptide was able to displace the anti-anti-beta 2GPI anti-idiotypic Abs for binding the anti-beta 2GPI Abs on the valve by a competition assay. Conclusion: We point to the possibility that Libman-Sacks nonbacterial endocarditis may have an infectious origin. (c) 2004 Elsevier Ltd. All rights reserved MH - Israel MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0049-3848 UR - ISI:000228015200036 L2 - Libman-Sacks endocarditis;beta-2-glycoprotein-I;synthetic peptides;antiphospholipid syndrome;SYSTEMIC LUPUS-ERYTHEMATOSUS; VALVULAR HEART-DISEASE; APOPTOTIC CELLS; IN-VIVO; ANTIBODIES; PEPTIDE; MANIFESTATIONS; CARDIOLIPIN; ACTIVATION; EXPRESSION SO - Thrombosis Research 2004 ;114(5-6):589-592 10233 UI - 2618 AU - Blank M AU - Shani A AU - Goldberg I AU - Kopilovic J AU - Amigo MC AU - Magrini L AU - Shoenfeld Y AD - Chaim Sheba Med Ctr, Dept Med B, IL-52621 Tel Hashomer, IsraelChaim Sheba Med Ctr, Ctr Autoimmune Dis, IL-52621 Tel Hashomer, IsraelTel Aviv Univ, Sackler Fac Med, IL-69978 Tel Aviv, IsraelInst Nacl Cardiol Ignacio Chavez, Dept Rheumatol, Mexico City, DF, MexicoUniv Roma La Sapienza, Dept Clin & Therapeut Appl Med, Rome, Italy TI - Libman-Sacks endocarditis associated with antiphospholipid syndrome and infection MH - Israel MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0049-3848 UR - ISI:000228015200127 SO - Thrombosis Research 2004 ;114(5-6):634-634 10234 UI - 5079 AU - Blitvich BJ AU - Fernandez-Salas I AU - Contreras-Cordero JF AU - Lorono-Pino MA AU - Marlenee NL AU - Diaz FJ AU - Gonzalez-Rojas JI AU - Obregon-Martinez NB AU - Chiu-Garcia JA AU - Black WC AU - Beaty BJ AD - Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropod Borne & Infect Dis Lab, Ft Collins, CO 80523, USAUniv Autonoma Nuevo Leon, San Nicolas De Los Garza, Nuevo Leon, MexicoBeaty, BJ, Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropod Borne & Infect Dis Lab, Ft Collins, CO 80523 USA TI - Phylogenetic analysis of West Nile virus, Nuevo Leon State, Mexico AB - West Nile virus RNA was detected in brain tissue from a horse that died in June 2003 in Nuevo Leon State, Mexico. Nucleotide sequencing and phylogenetic analysis of the premembrane and envelope genes showed that the virus was most closely related to West Nile virus isolates collected in Texas in 2002 MH - USA MH - Mexico|Nuevo Leon PB - ATLANTA: CENTER DISEASE CONTROL RP - NOT IN FILE U3 - TC 10 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1080-6040 UR - ISI:000222456800023 L2 - SEROLOGIC EVIDENCE; UNITED-STATES; YUCATAN-STATE; INFECTION; SEQUENCES; OUTBREAK; STRAINS; HORSES; BIRDS SO - Emerging Infectious Diseases 2004 ;10(7):1314-1317 10235 UI - 4155 AU - Block DL AU - Freeman KC AU - Jarrett TH AU - Puerari I AU - Worthey G AU - Combes F AU - Groess R AD - Univ Witwatersrand, Sch Computat & Appl Math, ZA-2050 Wits, South AfricaAustralian Natl Univ, Res Sch Astron & Astrophys, Mt Stromlo & Siding Spring Observ, Woden, ACT, AustraliaCALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125, USAInst Nacl Astrofis Opt & Elect, Tonantzintla 72840, Puebla, MexicoWashington State Univ, Pullman, WA 99163, USAObserv Paris, LERMA, F-75014 Paris, FranceBlock, DL, Univ Witwatersrand, Sch Computat & Appl Math, Private Bag 3, ZA-2050 Wits, South Africa TI - Very luminous carbon stars in the outer disk of the Triangulum spiral galaxy AB - Stars with masses in the range from about 1.3 to 3.5 M-circle dot pass through an evolutionary stage where they become carbon stars. In this stage, which lasts a few Myr, these stars are extremely luminous pulsating giants. They are so luminous in the near-infrared that just a few of them can double the integrated luminosity of intermediate-age (0.6 to 2 Gyr) Magellanic Cloud clusters at 2.2 microns. Astronomers routinely use such near-infrared observations to minimize the effects of dust extinction, but it is precisely in this band that carbon stars can contribute hugely. The actual contribution of carbon stars to the outer disk light of evolving spiral galaxies has not previously been morphologically investigated. Here we report new and very deep near-IR images of the Triangulum spiral galaxy M33=NGC 598, delineating spectacular arcs of carbon stars in its outer regions. It is these arcs which dominate the near-infrared m=2 Fourier spectra of M33. We present near-infrared photometry with the Hale 5-m reflector, and propose that the arcs are the signature of accretion of low metallicity gas in the outer disk of M33 MH - Australia MH - France MH - Mexico|Puebla MH - South Africa MH - USA PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000224623400001 L2 - galaxies : evolution;galaxies : spiral;galaxies : individual : M33=NGC 598;STELLAR POPULATIONS; M33; PHOTOMETRY; SYSTEMS; COLORS SO - Astronomy & Astrophysics 2004 ;425(3):L37-L40 10236 UI - 4958 AU - Block DL AU - Buta R AU - Knapen JH AU - Elmegreen DM AU - Elmegreen BG AU - Puerari I AD - Univ Witwatersrand, Sch Computat & Appl Math, ZA-2050 Wits, Gauteng, South AfricaUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAUniv Hertfordshire, Sci & Technol Res Sch, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, EnglandVassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12604, USAIBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598, USAInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoBlock, DL, Univ Witwatersrand, Sch Computat & Appl Math, POB 60, ZA-2050 Wits, Gauteng, South Africa TI - Gravitational bar and spiral arm torques from K-s-band observations and implications for the pattern speeds AB - We have obtained deep near-infrared K-s-band William Herschel Telescope observations of a sample of 15 nearby spiral galaxies having a range of Hubble types and apparent bar strengths. The near-infrared light distributions are converted into gravitational potentials, and the maximum relative gravitational torques due to the bars and the spirals are estimated. We find that spiral strength, Q(s), and bar strength, Q(b), correlate well with other measures of spiral arm and bar amplitudes and that spiral and bar strengths also correlate well with each other. We also find a correlation between the position angle of the end of the bar and the position angle of the inner spiral. These correlations suggest that the bars and spirals grow together with the same rates and pattern speeds. We also show that the strongest bars tend to have the most open spiral patterns. Because open spirals imply high disk-to-halo mass ratios, bars and spirals most likely grow together as a combined disk instability. They stop growing for different reasons, however, giving the observed variation in bar-spiral morphologies. Bar growth stops because of saturation when most of the inner disk is in the bar, and spiral growth stops because of increased stability as the gas leaves and the outer disk heats up MH - United Kingdom MH - Mexico|Puebla MH - South Africa MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000222702800014 L2 - galaxies : kinematics and dynamics;galaxies : photometry;galaxies : spiral;galaxies : structure;DUST-PENETRATED CLASSIFICATION; GALAXY IC 4214; DISK GALAXIES; SURFACE PHOTOMETRY; RINGED GALAXIES; MORPHOLOGICAL CLASSIFICATION; DENSITY WAVES; RESONANCE; DYNAMICS; GAS SO - Astronomical Journal 2004 ;128(1):183-201 10237 UI - 2766 AU - Bobes RJ AU - Miranda C AU - Perez-Martinez M AU - Luu-The V AU - Romano MC AD - Inst Politecn Nacl, CINVESTAV, Dpto Fisiol Biofis & NC, Mexico City 07000, DF, MexicoUNAM, Fac Med Vet Zoot, Dpto Morfol, Mexico City, DF, MexicoUniv Laval, Med Ctr, Oncol & Mol Endocrinol Res Ctr, Laval, PQ G1V 4G2, CanadaRomano, MC, Inst Politecn Nacl, CINVESTAV, Dpto Fisiol Biofis & NC, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Isolation and characterization of goat ovarian aromatase cDNA: assessment of the activity using an intact cell system and placental expression AB - Goat ovarian follicles produce estrone and estradiol from androgens. The synthesis of C18 estrogens from C19 androgens requires cytochrome P450 aromatase, but little information about this key enzyme is available in the goat. We report here for the first time the cDNA sequence of the goat ovarian aromatase, the activity of the enzyme in a cell system, and its expression in the term goat placenta. A cDNA library from goat ovarian poly(A)+ RNA was constructed. Human aromatase cDNA was selected as probe to screen the library; several clones were isolated, but none was complete. The longest clone was 3.1 kb long, but it lacked the sequence coding for a few amino acids in the NH2-terminal. To obtain the missing sequence, we performed reverse amplification of the cDNA end (RACE). Sequence analysis indicated that goat aromatase possessed a very long 3'-untranslated region (similar to 1790 bp), and a polyadenylation signal (AATAAA) located at position 3320 downstream from the ATG start codon. The coding region of goat cDNA was inserted in an expression vector and transfected into HEK-293 cells that were cultured in presence of [C-14]-androstenedione, steroids extracted and further separated by TLC. The transfected cells efficiently transformed [C-14] androstenedione into estrone. This activity was inhibited by 4-hydroxyandrostenedione. We also investigated the presence of mRNA for P450 aromatase in the goat placenta, using reverse transcription-polymerase chain reaction (RT-PCR) and primers derived from the cDNA ovarian sequence and confirmed the expression of the mRNA in term placenta. (c) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0093-691X UR - ISI:000227659100015 L2 - aromatase;ovary;placenta;steroid hormones;follicle;goat;COMPLEMENTARY DEOXYRIBONUCLEIC-ACID; CYTOCHROME-P450 AROMATASE; MOLECULAR CHARACTERIZATION; ESTROUS-CYCLE; PLASMA-LEVELS; CAPRA-HIRCUS; PROGESTERONE; TRANSCRIPTS; PORCINE; GENES SO - Theriogenology 2004 ;62(3-4):532-543 10238 UI - 6664 AU - Boda D AU - Henderson D AU - Plaschko P AU - Fawcett WR AD - Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USAUniv Veszprem, Dept Phys Chem, H-8201 Veszprem, HungaryUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Calif Davis, Dept Chem, Davis, CA 95616, USAHenderson, D, Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA TI - Monte Carlo and density functional theory study of the electrical double layer: The dependence of the charge/voltage relation on the diameter of the ions AB - According to the well known Gouy-Chapman theory (GCT) for ions modeled as charged hard spheres that are of equal diameter, the diffuse layer potential (DLP), the potential at the distance of closest approach, is independent of the ionic diameter. In this paper, the question of the dependence of the diffuse layer DLP on the ion diameter is examined by means of a Monte Carlo (MC) simulation for three values of the diameter, d =2, 3 and 4.25 Angstrom, for three ion concentrations, 0.1, 1 and 2 M, for the cases of 1:1 and 2:1 salts. For 1:1 salts at the lower concentrations, the dependence of the MC DLP on d is found to be rather weak. Thus, for these salts, the GCT is reasonably successful on this point even though the actual GCT values for the DLP are less satisfactory. For 1:1 salts, density functional theory (DFT), which is generally more accurate than the GCT, gives a dependence of the DLP on d that, at large electrode charge, is too great. The MC results for 2:1 salts show an appreciable dependence of the DLP on d at higher concentrations, especially when the divalent ions are the counterions. For these salts the GCT fails to describe both the actual values of the DLP and its d dependence; here DFT is more successful. Interestingly, at high concentrations, for 2:1 salts the MC and DFT (but not the GCT) values of the DLP can have the opposite sign to that of the electrode charge MH - Hungary MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0892-7022 UR - ISI:000187295800010 L2 - Gouy-Chapman theory;Monte Carlo;diffuse layer potential;density functional theory;PRIMITIVE MODEL ELECTROLYTE; SIMULATION; CONDUCTIVITY; CAPACITANCE; NANOPORE; FLUID SO - Molecular Simulation 2004 ;30(2-3):137-141 10239 UI - 5786 AU - Boehm AB AU - Lluch-Cota DB AU - Davis KA AU - Winant CD AU - Monismith SG AD - Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305, USACtr Invest Biol Noroeste, La Paz, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USABoehm, AB, Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA TI - Covariation of coastal water temperature and microbial pollution at interannual to tidal periods AB - Water temperature and fecal indicator bacteria levels covary along the shoreline of Huntington and Newport Beach, California at interannual to tidal periods. During summer, cooler than average waters caused by interannual variability in sea surface temperature (SST), synoptic upwelling, and tidal-period cooling are coincident with elevated levels of microbial pollution in the surf zone. This relationship can be explained by the effects of weakening in stratification on the fate of a waste water plume and the prolonged persistence of fecal indicator bacteria in colder waters. During winter, warmer than average water caused by basin scale oscillations and atmospheric and oceanographic processes that contribute to the Multivariate El Nino Southern Oscillation Index are indicative of elevated total coliform levels in the surf zone. The elevated coliform levels can be ascribed to increased rainfall, and the resultant storm water inflow to the surf zone MH - USA MH - Mexico|Baja California Sur PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000220743300005 L2 - HUNTINGTON BEACH; VARIABILITY; ENTEROCOCCI; CALIFORNIA; BACTERIA; QUALITY SO - Geophysical Research Letters 2004 ;31(6): 10240 UI - 5478 AU - Bohigas J AU - Tapia M AU - Roth M AU - Ruiz MT AD - UNAM, Inst Astron, Ensenada 22830, Baja California, MexicoCarnegie Inst Washington, Las Campanas Observ, La Serena, ChileUniv Chile, Dept Astron, Santiago, ChileBohigas, J, UNAM, Inst Astron, Apdo Postal 877, Ensenada 22830, Baja California, Mexico TI - Optical imaging and spectroscopy of the HII region G353.2+0.9 in NGC 6357 and its relation to Pismis 24 AB - G353.2+0.9 is the brightest H II region in NGC 6357. The present observations imply that it is optically thin and contains similar to300 M-circle dot of ionized gas. It is probably expanding into the surrounding medium as a result of its higher thermal pressure. Its chemical composition is similar to that found in other H II regions located at comparable galactocentric distances. The inner regions are probably made of thin shells and filaments, whereas extended slabs of material, probably shells seen edge-on, are found in the periphery. Extinction, although abnormal, is quite uniform but somewhat larger in the brightest optical regions. The radio continuum and Halpha emission maps are very similar, indicating that most of the optical nebula is not embedded in the denser regions traced by molecular gas and by the presence of IR sources. About 10(50) UV photons per second are required to produce the Hbeta flux from the 11.'3x10' region surrounding Pis 24. Thus, most of the energy powering G353.2+0.9 and the surrounding environment is produced by the O3-O7 stars in Pis 24. Practically all Two Micron All Sky Survey sources with large near-infrared excesses are within G353.2+0.9, indicating that the most recent star-forming process occurred in this region. Some amount of heating and ionization is due to these stars. The formation of the Pis 24 cluster preceded and caused the formation of this new generation of stars and may be responsible for the present-day morphology of the entire NGC 6357 region MH - Chile MH - Mexico|Baja California PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000221585000024 L2 - HII regions;ISM : individual (NGC 6357);H-II REGIONS; ELEMENTAL ABUNDANCES; CHEMICAL-COMPOSITION; LINE-INTENSITIES; NGC 6357; O-STARS; EMISSION; TEMPERATURE; EXTINCTION; PHOTOMETRY SO - Astronomical Journal 2004 ;127(5):2826-2837 10241 UI - 5275 AU - Boiko I AU - Fridman L AU - Castellanos ML AD - SNC Lavalin, Calgary, AB T2P 3G5, CanadaNatl Autonomous Univ Mexico, Div Posgrado, Fac Ingn, Mexico City 70256, DF, MexicoBoiko, I, SNC Lavalin, Calgary, AB T2P 3G5, Canada TI - Analysis of second-order sliding-mode algorithms in the frequency domain AB - A frequency domain analysis of the second-order sliding-mode algorithms, particularly of the twisting algorithm is carried out in the frequency domain with the use of the describing function method and Tsypkin's approach. It is shown that in the presence of an actuator, the transient process may converge to a periodic motion. Parameters of this periodic motion are analyzed. A comparison of the periodic solutions in the systems with higher order sliding-mode controllers and the oscillations that occur in classical sliding-mode systems with actuators is done MH - Canada MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 14 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000222050300008 L2 - chattering;relay control;sliding-mode (SM);variable structure systems;CONTROL-SYSTEMS; ORDER SO - Ieee Transactions on Automatic Control 2004 ;49(6):946-950 10242 UI - 4212 AU - Bojdecki T AU - Gorostiza LG AU - Talarczyk A AD - Ctr Invest & Estudios Avanzados, Dept Math, Mexico City 07000, DF, MexicoWarsaw Univ, Math Inst, PL-02097 Warsaw, PolandGorostiza, LG, Ctr Invest & Estudios Avanzados, Dept Math, AP 14-740, Mexico City 07000, DF, Mexico TI - Sub-fractional Brownian motion and its relation to occupation times AB - We study a long-range dependence Gaussian process which we call "sub-fractional Brownian motion" (sub-fBm), because it is intermediate between Brownian motion (Bm) and fractional Brownian motion (fBm) in the sense that it has properties analogous to those of fBm, but the increments on non-overlapping intervals are more weakly correlated and their covariance decays polynomially at a higher rate. Sub-fBm has a parameter h is an element of (0, 2), we show how it arises from occupation time fluctuations of branching particle systems for h greater than or equal to I and we exhibit the long memory effect of the initial condition. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0167-7152 UR - ISI:000224169500004 L2 - long-range dependence;fractional Brownian motion;sub-fractional Brownian motion;occupation time fluctuations;branching systems;SYSTEMS SO - Statistics & Probability Letters 2004 ;69(4):405-419 10243 UI - 4470 AU - Bojdecki T AU - Gorostiza LG AU - Talarczyk A AD - Univ Warsaw, PL-00325 Warsaw, PolandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoNatl Autonomous Univ Mexico, Inst Math, Mexico City 04510, DF, MexicoCIMAT, Guanajuato, MexicoBojdecki, T, Univ Warsaw, PL-00325 Warsaw, Poland TI - Fractional Brownian density process and its self-intersection local time of order k AB - The fractional Brownian density process is a continuous centered Gaussian T'(R-d)-valued process which arises as a high-density fluctuation limit of a Poisson system of independent d-dimensional fractional Brownian motions with Hurst parameter H. (T'(R-d) is the space of tempered distributions). The main result proved in the paper is that if the intensity measure mu of the (initial) Poisson random measure on R-d is either the Lebesgue measure or a finite measure, then the density process has self-intersection local time of order kgreater than or equal to2 if and only if Hd 22 weeks. In another field trial, spinosad at 5 p.p.m. and temephos both completely eliminated reproduction of Ae. aegypti for 13 weeks. In contrast, the bacterial insecticide Bacillus thuringiensis var. israelensis (Bti, Vectobac(R) AS) performed poorly with just 2 weeks of complete inhibition of Ae. aegypti breeding. Spinosad also effectively prevented breeding of Culex mosquitoes and chironomids in both trials to a degree similar to that of temephos. We conclude that spinosad merits evaluation as a replacement for organophosphate or Bti treatment of domestic water tanks in Mesoamerica. We also predict that spinosad is likely to be an effective larvicide for treatment of mosquito breeding sites MH - Mexico|Chiapas MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0269-283X UR - ISI:000220087800007 L2 - Aedes aegypti;Anopheles albimanus;Bacillus thuringiensis israelensis;Culex spp.;Chironomidae;inhibition of reproduction;larvicide;spinosad;temephos;Mexico;MANAGEMENT SO - Medical and Veterinary Entomology 2004 ;18(1):50-56 10251 UI - 5373 AU - Bonfil C AU - Cortes P AU - Espelta JM AU - Retana J AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Mexico City 04510, DF, MexicoUniv Autonoma Barcelona, Fac Ciencias, Unitat Ecol, Bellaterra 08193, Barcelona, SpainUniv Autonoma Barcelona, Fac Ciencias, CREAF, Bellaterra 08193, Barcelona, SpainRetana, J, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Circuito Exterior, Mexico City 04510, DF, Mexico TI - The role of disturbance in the co-existence of the evergreen Quercus ilex and the deciduous Quercus cerrioides AB - Question: Which is the response of the evergreen Quercus ilex and the deciduous Q. cerrioides to repeated disturbances? Location: central Catalonia (northeastern Spain), in the areas affected by two of the largest historically recorded wildfires in NE Spain: the Bages-Bergueda fire (24 300 ha forested area burned in July 1994), and the Solsones fire (14 300 ha burned in 1998). Methods: Survival and growth of individuals of Quercus ilex and Q. cerrioides were evaluated in plants subjected to different fire histories and experimental disturbances (burning, cutting or clipping) applied either before or after summer. Results: Survival was high (> 99%), with both species showing a similar high resistance to disturbances. Growth after experimental disturbance was positively related to the size of the individual before the latest forest fire occurred. Fire history had a large effect on resprout growth, as the repeated incidence of disturbances lowered the capacity of individuals to grow. The type and season of experimental disturbance experienced by plants had a large effect. Individuals that experienced total above-ground loss had lower growth rates than those with partial loss. A similar pattern was observed in individuals disturbed after the summer in relation to those disturbed before summer. Conclusions: The larger growth rates recorded in Q. cerrioides across all fire histories and experimental treatments, and the higher vulnerability of Q. ilex to increased fire frequency, intensity of experimental disturbance, and disturbance season, provide evidence for the relatively high susceptibility of the latter to repeated disturbances. This view disagrees with the larger resilience of this species compared to co-existing deciduous oaks, as reported MH - Mexico|Distrito Federal MH - Spain PB - GRANGARDE: OPULUS PRESS UPPSALA AB RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Ecology;Forestry U5 - J;Article AV - English IS - 1100-9233 UR - ISI:000221705200016 L2 - burning;clipping;fire;survival;growth;resilience;resprouting;Mediterranean region;Quercus;MEDITERRANEAN OAKS; PLANT-COMMUNITIES; FIRE; PATTERNS; FOREST; DYNAMICS; GROWTH; SHRUBS; ROOT SO - Journal of Vegetation Science 2004 ;15(3):423-430 10252 UI - 4790 AU - Boone P AU - Chavez E AU - Gleitzky L AU - Kranakis E AU - Opatrny J AU - Salazar G AU - Urrutia J AD - Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaUniv Michoacana San Nicolas Hidalgo, Escuela Ciencias Fismatemat, Morelia, Michoacan, MexicoUASLP, IICO, San Luis Potosi 78210, MexicoConcordia Univ, Dept Comp Sci, Montreal, PQ H3G 1M8, CanadaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoBoone, P, Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, Canada TI - Morelia test: Improving the efficiency of the gabriel test and face routing in ad-hoc networks AB - An important technique for discovering routes between two nodes in an ad-hoc network involves applying the face routing algorithm on a planar spanner of the network. Face routing guarantees message delivery in networks that contains large holes, where greedy algorithms fail. Existing techniques for constructing a suitable planar subgraph involve local tests that eliminate crossings between existing links by deleting some links. They do not test whether the deleted links actually create some crossings and some of the links are deleted needlessly. As a result, some of the routes found in face routing will have an unnecessarily large number of hops from source to destination. We consider a new local test for preprocessing a wireless network that produces a planar subgraph. The test is relatively simple, requires low overhead and does not eliminate existing links unless it is needed to eliminate a crossing, thus reducing overhead associated with multiple hops MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|San Luis Potosi PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000222843600003 SO - Structural Information and Communication Complexity, Proceeding 2004 ;3104():23-34 10253 UI - 5729 AU - Booton GC AU - Rogerson A AU - Bonilla TD AU - Seal DV AU - Kelly DJ AU - Beattie TK AU - Tomlinson A AU - Lares-Villa F AU - Fuerst PA AU - Byers TJ AD - Ohio State Univ, Dept Mol Genet, Columbus, OH 43210, USAOhio State Univ, Dept Ecol Evolut & Organismal Biol, Columbus, OH 43210, USANova SE Univ, Oceanog Ctr, Dania, FL 33004, USACity Univ London, Appl Vis Res Ctr, London, EnglandGlasgow Caledonian Univ, Dept Vis Sci, Glasgow G4 0BA, Lanark, ScotlandTechnol Inst Sonora, Obregon, Sonora, MexicoBooton, GC, Ohio State Univ, Dept Mol Genet, 484 W 12Th Ave, Columbus, OH 43210 USA TI - Molecular and physiological evaluation of subtropical environmental isolates of Acanthamoeba spp., causal agent of Acanthamoeba keratitis AB - Previous molecular examination of Acanthamoeba spp. has resulted in the determination of distinct genotypes in this genus (designated T1-T12, T14). Genotype T4 has been responsible for the majority of cases of Acanthamoeba keratitis. Here we examine the relative abundance of environmental T4 isolates on beaches and ask whether they have temperature and salinity tolerances that could enhance pathogenicity. Twenty-four Acanthamoeba strains were isolated from beach sand (n = 20), soil (n = 3), and tap water (n = 1) in south Florida. Phylogenetic analysis identified 19 of 24 isolates as T4, the Acanthamoeba keratitis-associated genotype. The remaining isolates were genotype T5 (4) and T11 (1). Nearly all beach isolates were genotype T4, whereas the tap water and soil isolates were mostly T5. All amoebae grew at 0, 1.0, and 2.0% salt and 19 of 20 beach isolates also grew at 3.2%. No soil or tapwater acanthamoebae reproduced at 3.2%. All isolates grew at 37 degreesC and two (T5) at 42 degreesC. Little correlation existed between beach location, salt-tolerance, and genetic relatedness. Overall, the large majority of environmental isolates obtained were genotype T4, suggesting it may be the most common genotype in this environment and could be a potential source of Acanthamoeba keratitis infections MH - United Kingdom MH - Mexico|Sonora MH - USA PB - LAWRENCE: SOC PROTOZOOLOGISTS RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 1066-5234 UR - ISI:000220884400009 L2 - amoeba;evolution;phylogenetics;ribosomal RNA;HYDROGEL CONTACT-LENSES; MICROBIAL KERATITIS; HONG-KONG; GENUS ACANTHAMOEBA; AMEBIC KERATITIS; INFECTION; STRAINS; DIFFERENTIATION; IDENTIFICATION; GROWTH SO - Journal of Eukaryotic Microbiology 2004 ;51(2):192-200 10254 UI - 4771 AU - Borchert R AU - Meyer SA AU - Felger RS AU - Porter-Bolland L AD - Univ Kansas, Div Biol Sci, Lawrence, KS 66045, USADrylands Inst, Tucson, AZ 85719, USAInst Ecol, AC, Xalapa 91070, Veracruz, MexicoBorchert, R, Univ Kansas, Div Biol Sci, Lawrence, KS 66045, USA TI - Environmental control of flowering periodicity in Costa Rican and Mexican tropical dry forests AB - Aim We analyse the proximate causes of the large variation in flowering periodicity among four tropical dry forests (TDF) and ask whether climatic periodicity or biotic interactions are the ultimate causes of flowering periodicity. Location The four TDFs in Guanacaste (Costa Rica), Yucatan, Jalisco and Sonora (Mexico) are characterized by a 5-7 month long dry season and are located along a gradient of increasing latitude (10-30degreesN). Methods To dissect the differences in flowering periodicity observed at the community level, individual tree species were assigned to 'flowering types', i.e. groups of species with characteristic flowering periods determined by similar combinations of environmental flowering cues and vegetative phenology. Results Large variation in the fraction of species and flowering types blooming during the dry and wet season, respectively, indicates large differences in the severity of seasonal drought among the four forests. In the dry upland forests of Jalisco, flowering of leafless trees remains suppressed during severe seasonal drought and is triggered by the first rains of the wet season. In the other forests, leaf shedding, exceptional rainfall or increasing daylength cause flowering of many deciduous species at various times during the dry season, well before the summer rains. The fraction of deciduous species leafing out during the summer rains and flowering when leafless during the dry season is largest in the Sonoran TDF. Main conclusions In many wide-ranging species the phenotypic plasticity of flowering periodicity is large. The distinct temporal separation of spring flowering on leafless shoots and subsequent summer flushing represents a unique adaptation of tree development to climates with a relatively short rainy season and a long dry season. Seasonal variation in rainfall and soil water availability apparently constitutes not only the proximate, but also the ultimate cause of flowering periodicity, which is unlikely to have evolved in response to biotic adaptive pressures MH - Mexico|Veracruz MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 15 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0960-7447 UR - ISI:000223112700003 L2 - Costa Rica;flower induction;flowering phenology;Mexico;photoperiodic control;rainfall periodicity;tropical deciduous forest;tropical tree phenology;DECIDUOUS FOREST; SONORAN DESERT; TREES; PHENOLOGY; RAIN; INDUCTION; LOWLANDS; REGION; CACTI; WET SO - Global Ecology and Biogeography 2004 ;13(5):409-425 10255 UI - 5043 AU - Borderas TF AU - Pawluczuk B AU - de Passille AM AU - Rushen J AD - Agr & Agri Food Canada, Dairy & Swine Res & Dev Ctr, Lennoxville, PQ J1M 1Z3, CanadaUniv Autonoma Metropolitana Xochimilco, Dept Prod Agr & Anim, Coyoacan 04320, DF, MexicoBorderas, TF, Agr & Agri Food Canada, Dairy & Swine Res & Dev Ctr, Lennoxville, PQ J1M 1Z3, Canada TI - Claw hardness of dairy cows: Relationship to water content and claw lesions AB - Lameness of dairy cows is a major welfare and economic problem. Degree of hardness of claws may influence chances for injury or for claw lesions, and exposure of claws to moisture may make them soft. To assess the relationship among hardness of the claw horn, quantity and rate of absorption of water, and incidence of claw lesions, 4 experiments were carried out. In the first 3 experiments, we soaked pieces of the claw horn in water for 12 to 24 h. Soaked claws gained weight and became significantly softer, indicating that water was absorbed. One-third of the total water absorbed in 24 h occurred during the first hour. Base of the abaxial and dorsal walls of the claw was harder than the sole, but became softer more rapidly when soaked in water. In the 4th experiment, significant negative correlations were detected between claw hardness of cows and severity of claw lesions, suggesting that cows with softer claws have the most severe claw lesions. Claw horn tissue absorbs water rapidly and claw hardness decreases with moisture content, suggesting that brief exposures to moist surfaces result in claws that absorb water and consequently become softer. The relationship between hardness and claw lesions indicates that cows with softer claws are at greater risk for lameness MH - Canada MH - Mexico|Distrito Federal PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000222323800014 L2 - lameness;claw lesion;claw hardness;claw water content;PHYSICAL-PROPERTIES; SOLE HORN; LAMENESS; CATTLE; QUALITY; LAMINITIS; HOOVES; HEALTH; BIOTIN; HERDS SO - Journal of Dairy Science 2004 ;87(7):2085-2093 10256 UI - 4225 AU - Bordes P AU - Wigneshweraraj SR AU - Chaney M AU - Dago AE AU - Morett E AU - Buck M AD - Univ London Imperial Coll Sci Technol & Med, Dept Biol Sci, London SW7 2AZ, EnglandAbbott Murex, Biotechnol, Dartford DA1 5LR, Kent, EnglandUniv Nacl Autonoma Mexico, Dept Reconocimiento Mol & Bioestructura, Cuernavaca 62250, Morelos, MexicoBuck, M, Univ London Imperial Coll Sci Technol & Med, Dept Biol Sci, Sir Alexander Fleming Bldg,S Kensington Campus, London SW7 2AZ, England TI - Communication between E sigma(54), promoter DNA and the conserved threonine residue in the GAFTGA motif of the PspF sigma(54)-dependent activator during transcription activation AB - Conversion of Esigma(54) closed promoter complexes to open promoter complexes requires specialized activators which are members of the AAA (ATPases Associated with various cellular Activities) protein family. The ATP binding and hydrolysis activity of Esigma(54) activators is used in an energy coupling reaction to remodel the Esigma(54) closed promoter complex and to overcome the sigma(54)-imposed block on open complex formation. The remodelling target for the AAA activator within the Esigma(54) closed complex includes a complex interface contributed to by Region I of sigma(54), core RNA polymerase and a promoter DNA fork junction structure, comprising the Esigma(54) regulatory centre. One sigma(54) binding surface on Esigma(54) activators is a conserved sequence known as the GAFTGA motif. Here, we present a detailed characterization of the interaction between Region I of sigma(54) and the Escherichia coli AAA sigma(54) activator Phage shock protein F. Using Esigma(54) promoter complexes that mimic different conformations adopted by the DNA during open complex formation, we investigated the contribution of the conserved threonine residue in the GAFTGA motif to transcription activation. Our results suggest that the organization of the Esigma(54) regulatory centre, and in particular the conformation adopted by the sigma(54) Region I and the DNA fork junction structure during open complex formation, is communicated to the AAA activator via the conserved T residue of the GAFTGA motif MH - United Kingdom MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000224398400018 L2 - ENHANCER-BINDING PROTEIN; CORE RNA-POLYMERASE; ESCHERICHIA-COLI; SIGMA 54; TERMINAL SEQUENCES; MOLECULAR MACHINE; ATP HYDROLYSIS; IN-VIVO; HOLOENZYME; DOMAIN SO - Molecular Microbiology 2004 ;54(2):489-506 10257 UI - 6446 AU - Borges-Yanez SA AU - Maupome G AU - Jimenez-Garcia G AD - Univ Nacl Autonoma Mexico, Fac Odontol, Div Estudios Posgrado & Invest, Mexico City 04510, DF, MexicoKaiser Permanente Ctr Hlth Res, Portland, OR, USAUniv Campeche, Fac Odontol, Campeche, MexicoBorges-Yanez, SA, Univ Nacl Autonoma Mexico, Fac Odontol, Div Estudios Posgrado & Invest, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Validity and reliability of partial examination to assess severe periodontitis AB - Objectives: To compare the extent and severity index (ESI) with a gold standard represented by actual readings of loss of attachment on six sites around all teeth present (excluding third molars). Methods: Five standardized dentists (kappa=0.6) examined 712 subjects greater than or equal to20 years of age at a dental school (1993-1995). Sensitivity, specificity, positive and negative predictive values, and true and apparent prevalence were established. Results: True severe periodontitis prevalence was 95.8%. ESI underestimated the severity (0.1 mm), extent (4%), and prevalence (16%) of periodontitis. The severity, as established by ESI, coincided 23.4% with the gold standard. ESI failed to identify 16.7% of subjects with severe periodontal disease, but specificity and positive predictive value were very high. Conclusions: The underestimation of severe periodontitis through ESI may lead to inadequate recommendations for further treatment. Accurately identifying subjects with severe periodontitis requires a full-mouth examination. Because the ESI relies on measurements taken on only 28 periodontal sites to estimate the periodontitis status of the entire mouth, the validity and reliability of ESI may be modified by the prevalence of severe periodontal disease and the distribution of disease according to age and operational definitions MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0303-6979 UR - ISI:000188256100008 L2 - epidemiology;extent and severity;periodontal disease;reliability;validity;ATTACHMENT LOSS; NATURAL-HISTORY; RISK INDICATORS; UNITED-STATES; PREVALENCE; DISEASE; EXTENT; ADULTS; INDEX; OLDER SO - Journal of Clinical Periodontology 2004 ;31(2):112-118 10258 UI - 3438 AU - Borges G AU - Cherpitel CJ AU - Macdonald S AU - Giesbrecht N AU - Stockwell T AU - Wilcox HC AD - Inst Nacl Psiquiatria, Mexico City 14370, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Mexico City 14370, DF, MexicoBorges, G, Alcohol Res Grp, Berkeley, CA, USA TI - A case-crossover study of acute alcohol use and suicide attempt AB - Objective: Several studies have shown that acute alcohol use is associated with suicidal behavior, but the magnitude and nature of the relationship remain unclear. We report a study on the impact of acute alcohol use on suicide attempts treated in the emergency room (ER) using the case-crossover design. Method: Seven ER studies carried out in the United States, Canada, Mexico and Australia from 1984 to 1996 with probability samples and similar methodology were merged yielding a total of 102 suicide attempters (overall 52% were male and 59% under 30 years of age). Results: Thirty-six patients reported alcohol use within 6 hours prior to the suicide attempt. When usual alcohol consumption during the past 12 months served as the control value, the estimated relative risk (RR) for patients who reported alcohol use within 6 hours prior to the suicide attempt was 9.6 (95% confidence interval: 5.7-16.3). Although the prevalence of alcohol use differed by sex, there was no statistically significant difference in the estimated RRs (RR = 13.6 men and RR = 5.3 women, p = 0.11 for the heterogeneity test). Conclusions: A positive association was found between alcohol use 6 hours prior and suicide attempts in 102 ER cases in four countries. The case-crossover methodology is well suited to studies for which an external control group is not easily obtainable MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: ALCOHOL RES DOCUMENTATION INC CENT ALCOHOL STUD RUTGERS UNIV RP - NOT IN FILE U3 - TC 8 U4 - Substance Abuse;Psychology U5 - J;Article AV - English IS - 0096-882X UR - ISI:000226266000004 L2 - EMERGENCY-ROOM PATIENTS; SUBSTANCE USE; GENERAL-POPULATION; CONSUMPTION; BEHAVIOR; INJURY; RISK; METAANALYSIS; CASUALTIES; DRINKING SO - Journal of Studies on Alcohol 2004 ;65(6):708-714 10259 UI - 5215 AU - Borges G AU - Cherpitel CJ AU - Medina-Mora ME AU - Mondragon L AD - Inst Nacl Psiquiatria Ramon de la Fuente, Direcc Invest Epidemiol & Psicosociales, Mexico City 14370, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Mexico City, DF, MexicoAlcohol Res Grp, Berkeley, CA, USABorges, G, Inst Nacl Psiquiatria Ramon de la Fuente, Direcc Invest Epidemiol & Psicosociales, Calzada Mexico Xochimilco 101 Col San Lorenzo, Mexico City 14370, DF, Mexico TI - Violence related injuries in the emergency room: Alcohol, depression, and conduct problems AB - Objective. The aim of this study was to obtain epidemiological measures of the association between alcohol consumption and emergency room (ER) attendance due to violence, compared to the general population in the city of Pachuca, Mexico, during October-November, 1996 and June July, 1997. Method. The study was a population-based case-control design. Intervention and Measurements: Data consisted of an interviewer-administered questionnaire, collected on a 24-h basis, during the entire week. Setting and Participants: Cases were 127 patients (78% male) admitted to the ER because of an injury that was the result of violence (being in a fight or being attacked by someone). A sample of residents from Pachuca (n = 9120) was the comparison group. Results. Patients reporting drinking within 6h compared to nondrinkers were more likely to suffer a violence-related injury [34.0 (17.5-66.2)] and alcohol dependent patients were more likely to be involved in a violence-related injury [7.4 (3.5-15.6)] compared to noncurrent drinkers. When both alcohol prior and alcohol dependence were considered simultaneously in multiple models among current drinkers, patients with violence-related injuries were more likely to report alcohol prior but not to be positive for alcohol dependence. Depressive symptoms, but not conduct problem behavior, were also associated with violent injury in simultaneous regressions that included alcohol variables. Conclusions. In the city of Pachuca, Mexico, a large relationship between drinking prior to the event and violence-related injury, regardless of alcohol dependence, was found. Depression was also related to violence, suggesting the need for more comprehensive intervention with these patients MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 5 U4 - Substance Abuse;Psychiatry;Psychology U5 - J;Article AV - English IS - 1082-6084 UR - ISI:000221938800003 L2 - violence;injuries;emergency room;alcohol;depression;GENERAL-POPULATION; SUBSTANCE USE; CONSUMPTION; WOMEN; RISK; PERSONALITY; RELIABILITY; CASUALTIES; PATTERNS; DRINKING SO - Substance Use & Misuse 2004 ;39(6):911-930 10260 UI - 6018 AU - Borges G AU - Cherpitel CJ AU - Mondragon L AU - Poznyak V AU - Peden M AU - Gutierrez I AD - Inst Nacl Psiquiatria, Mexico City 10610, DF, MexicoUniv Autonoma Metropolitana Xochimilco, Xochimilco, MexicoInst Publ Hlth, Alcohol Res Grp, Berkeley, CA, USAWHO, Dept Mental Hlth & Subst Dependence, CH-1211 Geneva, SwitzerlandWHO, Dept Injuries & Violence Prevent, CH-1211 Geneva, SwitzerlandHosp Gen Dr Manuel Gea Gonzalez, Mexico City, DF, MexicoBorges, G, Inst Nacl Psiquiatria, Calzada Mexico Xochimilco 101, Mexico City 10610, DF, Mexico TI - Episodic alcohol use and risk of nonfatal injury AB - Usual and acute alcohol consumption are important risk factors for injury. Although alcohol-dependent people are thought to be at increased risk of injury, there are few reports suggesting that their risk is greater than that of nondependent alcohol users in a given episode of alcohol use. The authors conducted a case-crossover analysis of data on 705 injury patients from a hospital emergency department in Mexico City, Mexico, collected in 2002. The majority of the sample was male (60%) and over 30 years old (51%). With use of a multiple matching approach that took into account three control time periods (the day prior to the injury, the same day in the previous week, and the same day in the previous month), the estimated relative risk of injury for patients who reported having consumed alcohol within 6 hours prior to injury (17% of the sample) was 3.97 (95% confidence interval: 2.88, 5.48). This increase in the relative risk was concentrated within the first 2 hours after drinking; there was a positive association of increasing risk with increasing number of drinks consumed. These data suggested that relative risk estimates were the same for patients with and without alcohol use disorders MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 14 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000220180600005 L2 - alcohol drinking;case-control studies;risk;substance-related disorders;wounds and injuries;EMERGENCY-ROOM PATIENTS; CASE-CROSSOVER DESIGN; GENERAL-POPULATION; CONSUMPTION; INTERVENTION SO - American Journal of Epidemiology 2004 ;159(6):565-571 10261 UI - 5730 AU - Borghetti A AU - Gutierrez JA AU - Nucci CA AU - Paolone M AU - Petrache E AU - Rachidi F AD - Univ Bologna, Dept Elect Engn, Bologna, ItalyUniv Guadalajara, CINVESTAV, Guadalajara, Jalisco, MexicoSwiss Fed Inst Technol, Power Syst Lab, CH-1015 Lausanne, SwitzerlandBorghetti, A, Univ Bologna, Dept Elect Engn, Bologna, Italy TI - Lightning-induced voltages on complex distribution systems: models, advanced software tools and experimental validation AB - The evaluation and the analysis of the lightning electromagnetic pulse (LEMP) response of distribution networks require the availability of accurate models of LEMP-illuminated lines and their implementation into software tools able to calculate lightning-induced electro-magnetic transients in distribution systems having complex configuration. This paper deals indeed with a computer code, LIOV (lightning induced overvoltage code), and with two interfaces recently realized between it and (a) the DCG/EPRI EMTP96 oil the one hand and (b) the SimPowerSystems program in the Matlab-Simulink environment on the other hand. The aim of these interfaces is to extend the simulation capabilities of the LIOV code, which computes lightning-induced voltages on a single multiconductor transmission line above lossy ground, to the case of distribution systems characterized by complex yet realistic configurations. Models/code validation by means of a comparison with experimental results is also presented. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Jalisco MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0304-3886 UR - ISI:000220833500008 L2 - lightning-induced voltages;electromagnetic transients;insulation coordination;power quality;EMTP;Matlab;HORIZONTAL ELECTRIC-FIELD; OVERHEAD LINES; TRANSMISSION-LINES; RETURN STROKES SO - Journal of Electrostatics 2004 ;60(2-4):163-174 10262 UI - 5171 AU - Bories A AU - Himmi E AU - Jauregui JJA AU - Pelayo-Ortiz C AU - Gonzales VA AD - Inst Natl Rech Agron, Unite Experimentale, F-11430 Gruissan, FranceFac Sci Semlalia, Microbiol Lab, Marrakech 2390, MoroccoUniv Guadalajara, Dept Genie Chim, Guadalajara 44430, Jalisco, MexicoBories, A, Inst Natl Rech Agron, Unite Experimentale, F-11430 Gruissan, France TI - Glycerol fermentation with Propionibacteria and optimisation of the production of propionic acid AB - The propionic fermentation has been intensively studied for propionic acid production from carbohydrate feedstocks. Despite various advanced fermentation processes (continuous fermentation, immobilized cells, membrane bioreactor, extractive fermentation....), poor performances of the propionic fermentation of carbohydrates, in terms of conversion yield to propionic acid and of the level of acetic acid, have limited its development. Glycerol is a substrate that can be fermented by propionic acid-producing micro-organ isms, in particular propionibacteria strains. This pathway leads various perspectives for the improvement of the propionic acid production. The fermentation of glycerol comparatively to glucose was carried out using two propionibacteria strains: P. acidipropionici and P. freudenreichii ssp shermanii. During batch fermentation of glycerol (20 g/l), the conversion yield reached for P. acidipropionici and P. freudenreichii ssp shermanii, 0.79 and 0.58 mol/mol respectively, were 49% and 45% higher than with glucose (20 g/l). Final concentration of acetic acid was twice lower from 20 g/l glycerol (2 g/l) than from 20 g/l glucose (4g/l) for both strains. Increasing the initial glycerol concentration resulted in a maximal concentration of propionic acid: 42 g/l, with P. acidipropionici. The molar ratio: propionic acid / acetic acid with P. acidipropionici, during batch (5.5) and continuous fermentations (88), suggested the hypothesis of the homopropionic behaviour of the glycerol fermentation. Nevertheless, n-propanol and succinic acid, the minor by-products, were formed in higher quantities from glycerol than glucose. The immobilization of P. acidipropionici with calcium alginate was carried out for glycerol fermentation. Sequencing batch runs have shown good growth and productivity of propionic acid of the immobilized biomass. The study of the continuous glycerol fermentation, carried out with immobilized cells in an expanded bed fermentor (0.8 l), has shown, for a dilution rate of 0.154 h(-1), a very high productivity of propionic acid (3 g/l.h.) associated to a high yield (0.78 mol/mol). Glycerol fermentation to propionic acid has given, at once, a high yield, a high propionic acid content, a low acetic acid level and a high productivity. It demonstrated fine perpectives of optimisation of propionic acid production by microbial route MH - France MH - Mexico|Jalisco MH - Morocco PB - CACHAN: LAVOISIER RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - French IS - 0240-8813 UR - ISI:000222176700001 L2 - propionic acid;fermentation;glycerol;propionibacteria;immobilized cells;WHEY PERMEATE; EXTRACTIVE FERMENTATION; BED BIOREACTOR; ACIDIPROPIONICI; SHERMANII; BATCH; ULTRAFILTRATION; FREUDENREICHII; INHIBITION; RECYCLE SO - Sciences des Aliments 2004 ;24(2):121-135 10263 UI - 6586 AU - Borissova J AU - Kurtev R AU - Georgiev L AU - Rosado M AD - Pontificia Univ Catolica Chile, Fac Fis, Dept Astron & Astrofis, Santiago 7820436, ChileUniv Sofia, Dept Astron, Sofia 1164, BulgariaIsaac Newton Inst Chile Bulgarian Branch, Sofia 1164, BulgariaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoBorissova, J, Pontificia Univ Catolica Chile, Fac Fis, Dept Astron & Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, Chile TI - A catalogue of OB associations in IC 1613 AB - We present a catalogue of OB associations in IC 1613. Using an automatic and objective method (Battinelli's 1991 technique) 60 objects were found. The size distribution reveals a significant peak at about 60 parsecs if a distance modulus of 24.27 mag is assumed. Spatial distributions of the detected associations and H II regions are strongly correlated MH - Bulgaria MH - Chile MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000187887900014 L2 - galaxies : individual : IC 1613;galaxies : Local Group;galaxies : stellar content;IRREGULAR GALAXY IC-1613; STELLAR CONTENT; NEARBY GALAXIES; STARS; COMPLEX; GAS SO - Astronomy & Astrophysics 2004 ;413(3):889-893 10264 UI - 3740 AU - Borras C AU - Fleitas I AU - Caspani C AU - Plazas MC AU - Miranda A AU - Branda ME AD - Inst Radiol Imaging Sci, Frederick, MD, USAPan Amer Hlth Org, Washington, DC, USASecretaria Salud Santa Fe, Santa Fe, ArgentinaUniv Nacl Colombia, Bogota, ColombiaInst Boliviano Ciencia & Tecnol Nucl, La Paz, BoliviaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico TI - Diagnostic accuracy of selected x-ray studies vs staff training and experience, equipment performance, patient dose and image quality in five Latin American countries MH - Argentina MH - Bolivia MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Meeting Abstract AV - English IS - 0094-2405 UR - ISI:000222259100103 SO - Medical Physics 2004 ;31(6):1725-1725 10265 UI - 2311 AU - Bose P AU - Hurtado F AU - Rivera-Campo E AU - Wood DR AD - Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaUniv Politecn Catalunya, Dept Matemat Aplicada 2, Barcelona, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Iztapalapa, MexicoCharles Univ, Dept Appl Math, CR-11800 Prague, Czech RepublicBose, P, Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, Canada TI - Partitions of complete geometric graphs into plane trees AB - Consider the following open problem: does every complete geometric graph K-2n have a partition of its edge set into n plane spanning trees? We approach this problem from three directions. First, we study the case of convex geometric graphs. It is well known that the complete convex graph K-2n has a partition into n plane spanning trees. We characterise all such partitions. Second, we give a sufficient condition, which generalises the convex case, for a complete geometric graph to have a partition into plane spanning trees. Finally, we consider a relaxation of the problem in which the trees of the partition are not necessarily spanning. We prove that every complete geometric graph K-n can be partitioned into at most n - &RADIC; n/12 plane trees MH - Canada MH - Czech Republic MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000228693700009 SO - Graph Drawing 2004 ;3383():71-81 10266 UI - 2845 AU - Bottcher A AU - Grudsky SM AU - de Arellano ER AD - TU Chemnitz, Fak Math, D-09107 Chemnitz, GermanyInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoBottcher, A, TU Chemnitz, Fak Math, D-09107 Chemnitz, Germany TI - Algebras of Toeplitz operators with oscillating symbols AB - This paper is devoted to Banach algebras generated by Toeplitz operators with strongly oscillating symbols, that is, with symbols of the form b(e(ia(x))) where b belongs to some algebra of functions on the unit circle and a is a fixed orientation-preserving homeomorphism of the real line onto itself. We prove the existence of certain interesting homomorphisms and establish conditions for the normal solvability, Fredholmness, and invertibility of operators in these algebras MH - Germany MH - Mexico|Distrito Federal PB - MADRID: UNIVERSIDAD AUTONOMA MADRID RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0213-2230 UR - ISI:000227573000002 L2 - Toeplitz operator;Banach algebra;C*-algebra;Fredholm operator;normally solvable operator;BLASCHKE PRODUCTS SO - Revista Matematica Iberoamericana 2004 ;20(3):647-671 10267 UI - 5310 AU - Boucard CGV AU - Patrois J AU - Ceccaldi HJ AD - Ctr Invest Biol Noroeste, Dpet Marine Aquaculture, La Paz, BSC, MexicoInst Francais Rech Exploitat Mer, Ctr Tahiti, Taravao, Tahiti, Fr PolynesiaFac Sci & Tech St Jerome, Ctr Etud Ressources Anim Marine, F-13397 Marseille, FranceBoucard, CGV, Ctr Invest Biol Noroeste, Dpet Marine Aquaculture, La Paz, BSC, Mexico TI - Exhaustion of lipid reserves in the hepatopancreas of Fenneropenaeus indicus broodstock in relation to successive spawnings AB - After eyestalk ablation, penaeid shrimp females spawn several times during a reproductive cycle. This forced reproduction affects larval quality in production laboratories. The biochemical composition of ovaries and hepatopancreas (total proteins, total lipids, vitellin, lipid and fatty acids classes) of Fenneropenaeus indicus spawners was studied according to spawning rank. Depletion of the total protein and lipid hepatopancreas reserves was observed before the fourth spawning (total proteins down from 99.89 to 26.13 mg/hepatopancreas, total lipids down from 133.38 to 26.92 mg/hepatopancreas). Structural lipids (phospholipids), energy lipids (triacylglycerols) and some minor classes of lipids (sterol, free fatty acids, diacylglycerols and hydrocarbons) also decreased significantly. The successive spawning also affected some biochemical compounds of the ovary (total proteins down from 291.62 to 256.46 mg/ovary, total lipids down from 101.07 to 73.63 mg/ovary, vitellin down from 373.48 to 302.77 mg/ovary, triacylglycerols down from 35.80% to 25.78% of total lipids). This decrease is related to the size of ovaries since the gonadosomatic index (GSI) fell by about 20% between the first and the fourth spawning. This study demonstrated depletion of nutritional reserves in hepatopancreas of spawning shrimp. (C) 2003 Elsevier B.V. All rights reserved MH - Fr Polynesia MH - France MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000221946500040 L2 - eyestalk ablation;hepatopancreas;ovary;lipids;proteins;vitellin;penaeidae;UNSATURATED FATTY-ACIDS; ROSENBERGII DE-MAN; PENAEUS-VANNAMEI; BIOCHEMICAL-COMPOSITION; MACROBRACHIUM-ROSENBERGII; DIETARY PHOSPHOLIPIDS; INDUCED MATURATION; KURUMA PRAWN; SHRIMP; OVARY SO - Aquaculture 2004 ;236(1-4):523-537 10268 UI - 4347 AU - Boumis P AU - Meaburn J AU - Lopez JA AU - Mavromatakis F AU - Redman MP AU - Harman DJ AU - Goudis CD AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceUniv Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUNAM, Astron Inst, Ensenada 22800, Baja California, MexicoUniv Crete, Dept Phys, Iraklion 71003, Crete, GreeceDublin Inst Adv Studies, Sch Cosm Phys, Dublin 2, IrelandUniv Patras, Dept Phys, Astron Lab, Rion 26500, GreeceBoumis, P, Natl Observ Athens, Inst Astron & Astrophys, I Metaxa & V Paulou,P Penteli, Athens 15236, Greece TI - The kinematics of the bi-lobal supernova remnant G 65.3+5.7. II AB - Further deep, narrow-band images in the light of [0 in] 5007 A have been added to the previous mosaic of the faint galactic supernova remnant G 65.3+5.7. Additionally, long-slit spatially resolved [0 in] 5007 A line profiles have been obtained at sample positions using the Manchester Echelle Spectrometer at the San Pedro Martir observatory. The remnant is shown to be predominantly bi-lobal with an EW axis. However, a faint additional northern lobe has now been revealed. The splitting of the profiles along the slit lengths, when extrapolated to the centre of the remnant, although uncertain, suggests that the expansion velocity of this remnant is between 124 and 187 km s(-1) i.e. much lower than the 400 km s(-1) previously predicted for the forward shock velocity from the X-ray emission. An expansion proper motion measurement of 2.1 +/- 0.4 arcsec in 48 years for the remnant's filamentary edge in the light of Halpha+ [N II] 6548 and 6584 Angstrom has also been made. This is combined with an expansion velocity of approximate to155 km s(-1), a distance of approximate to800 pc is derived. Several possibilities are considered for the large difference in the expansion velocity measured here and the 400 km s(-1) shock velocity required to generate the X-ray emission. It is also suggested that the morphology of the remnant may be created by a tilt in the galactic magnetic field in this vicinity MH - United Kingdom MH - Greece MH - Ireland MH - Mexico|Baja California PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000224300800025 L2 - ISM : general;ISM : supernova remnants;ISM : individual objects : G 65.3+5.7;ECHELLE SPECTROMETER; INTERSTELLAR CLOUDS; CYGNUS LOOP SO - Astronomy & Astrophysics 2004 ;424(2):583-588 10269 UI - 4455 AU - Bourouis A AU - Coronas A AU - Romero RJ AU - Siqueiros J AD - Univ Rovira & Virgili, Ctr Innovac Tecnol Revelorizac Energet & Refriger, CREVER, Tarragona 43006, SpainUniv Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca 62210, Morelos, MexicoBourouis, A, Univ Rovira & Virgili, Ctr Innovac Tecnol Revelorizac Energet & Refriger, CREVER, Autovia Salou,S-N, Tarragona 43006, Spain TI - Purification of seawater using absorption heat transformers with water-(LiBr+-LiI+LNO3+LiCl) and low temperature heat sources AB - The potential of the fluid mixture water-(LiBr+Lil+LiNO3 +LiCl) is studied by numerical simulation for purification of seawater using single-stage absorption heat transformer. The multi-component salt mixture shows a considerably higher solubility than that of the conventional working fluid water-LiBr and it is also less corrosive. The thermal operating conditions considered in the simulation correspond to heat delivered for water purification by an absorber operating at 100degreesC, waste heat supplied to the generator and the evaporator operating at temperatures ranged from 60 to 80degreesC, heat sink cooling the condenser operating at a temperature between 10 and 40degreesC. The results show better performance of the integrated absorption heat transformer water purification system using the working fluid water-(LiBr+Lil+LiNO3+LiCl) compared with the system using water-LiBr. The enthalpy-based coefficient of performance is higher and remains almost constant as the condensation temperature increases at the considered thermal operating conditions of the cycle. The wider range of solubility of the multi-component salt solution makes possible the operation of the heat transformer cycle at higher concentrations of the strong solution MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical;Water Resources U5 - J;Article AV - English IS - 0011-9164 UR - ISI:000223772100023 L2 - water purification;heat transformer;water-lithium bromide;water-(LiBr+LiI+LiNO3+LiCl);LITHIUM-CHLORIDE SYSTEM SO - Desalination 2004 ;166(1-3):209-214 10270 UI - 5105 AU - Bouzrara L AU - Ajjel R AU - Mejri H AU - Zaidi MA AU - Alaya S AU - Mimila-Arroyo J AU - Maaref H AD - Fac Sci, Lab Phys Semicond & Composants Elect, Monastir 5019, TunisiaAcad Mil, Ecole Preparatoire, Sousse 4029, TunisiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoBouzrara, L, Fac Sci, Lab Phys Semicond & Composants Elect, Monastir 5019, Tunisia TI - Excitonic recombination processes in GaAs grown by close-space vapour transport AB - Epitaxial GaAs layers were grown using the close-space vapour transport. From deep level transient spectroscopy measurements, the native EL2 donor has been observed in all of the layers with deposition temperature-dependent concentration. On the GaAs samples, also performed are photoluminescence experiments in the temperature range 10-300 K. Two peculiar features were revealed: (i) the radiative recombination in GaAs layers is increasingly dominated by bound-exciton transitions, (ii) the excitonic luminescence is found to be very sensitive to the growth conditions. A study of the near-band-edge photoluminescence as a function of power excitation and temperature has been done in an attempt to elucidate the origin of the enhanced bound-exciton luminescence. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Tunisia PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000222200300002 L2 - close-space vapour transport technique;GaAs;deep level transient spectroscopy photoluminescence;EL2 centre;bound-exciton transitions;near-bound-edge photoluminescence;SINGLE-CRYSTALS; DEEP LEVELS; PHOTOLUMINESCENCE; STOICHIOMETRY; LUMINESCENCE; ELECTRON; ACCEPTOR SO - Microelectronics Journal 2004 ;35(7):577-580 10271 UI - 3601 AU - Bradley RD AU - Carroll DS AU - Haynie ML AU - Martinez RM AU - Hamilton MJ AU - Kilpatrick CW AD - Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USATexas Tech Univ Museum, Lubbock, TX 79409, USAInst Politecn Nacl, Ctr Interdisciplinario Invest Para Desarrollo Int, Viecente Guerrero 34980, Durango, MexicoOklahoma State Univ, Dept Zool, Stillwater, OK 74078, USAUniv Vermont, Dept Biol, Burlington, VT 05405, USABradley, RD, Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USA TI - A new species of Peromyscus from western Mexico AB - Historically, specimens representing the Peromyscus boylii species group from west-central Mexico have been referred to as Peromyscus boylii; however, a distinct but polymorphic karyotype (fundamental number 54-56) precludes an assignment of these specimens to currently recognized taxa. Phylogenetic analyses (parsimony, likelihood, and Bayesian) of DNA sequences indicated that samples from Durango, Mexico, formed a monophyletic clade that either was sister to P. levipes (parsimony) or to a clade containing P. beatae and P. levipes (likelihood and Bayesian). To refer these samples to P. boylii results in paraphyly and a significantly worse topology. Together, these results indicate that the samples from the Sierra Madre Occidental region of Durango and southeastern Sinaloa represent an undescribed species of Peromyscus. This taxon is described herein as a new species MH - Mexico|Durango MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000225950800019 L2 - cytochrome-b gene;DNA sequences;Peromyscus;species group;CYTOCHROME-B SEQUENCES; GROUP RODENTIA; MOLECULAR SYSTEMATICS; KARYOTYPIC VARIATION; DNA-SEQUENCES; BOYLII; MURIDAE; CRICETIDAE; GENE SO - Journal of Mammalogy 2004 ;85(6):1184-1193 10272 UI - 5396 AU - Braine J AU - Lisenfeld U AU - Duc PA AU - Brinks E AU - Charmandaris V AU - Leon S AD - Observ Bordeaux, CNRS, INSU, UMR 5804, F-33270 Floirac, FranceCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainCNRS, URA 2052, F-91191 Gif Sur Yvette, FranceCEA, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceINAOE, Puebla 72000, MexicoCornell Univ, Dept Astron, Ithaca, NY 14853, USAObserv Paris, LERMA, F-75014 Paris, FranceBraine, J, Observ Bordeaux, CNRS, INSU, UMR 5804, BP 89, F-33270 Floirac, France TI - Colliding molecular clouds in head-on galaxy collisions AB - We present further observations of molecular gas in head-on collisions of spiral galaxies, this time of the CO(J = 1 --> 0) and CO(J = 2 --> 1) lines in the UGC 813 - UGC 816 system. UGC 813/6 are only the second known example of head-on spiral-spiral collisions, the first example being the UGC 12914/5 pair. Strong CO emission is present in the bridge between UGC 813 and 816, unassociated with stellar emission, just as in UGC 12914/5. The CO emission from the UGC 813/6 bridge, not counting the emission from the galaxies themselves, is at least that of the entire Milky Way. Collisions of gas-rich spirals are really collisions between the interstellar media (ISMs) of the galaxies. We show that collisions between molecular clouds bring H-2 into the bridge region. Although the dense clouds are ionized by the collisions, they cool and recombine very quickly and become molecular again even before the galactic disks separate. Because the clouds acquire an intermediate velocity post-collision, they are left in the bridge between the separating galaxies. The star formation efficiency appears low in the molecular clouds in the bridges. We speculate that the pre-stellar cores in the molecular clouds may expand during the cloud collisions, thus retarding future star formation. Because the ISM-ISM collisions discussed here require a very small impact parameter, they are rare among field spirals. In clusters, however, these collisions should be an important means of ejecting enriched gas from the inner parts of spirals MH - France MH - Mexico|Puebla MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000221669200005 L2 - galaxies : spiral;galaxies : evolution;galaxies : ISM;galaxies : interaction;galaxies : individual : UGC 813;galaxies : individual : UGC 816;INTERACTING GALAXIES; TAFFY GALAXIES; STAR FORMATION; GAS; PAIR SO - Astronomy & Astrophysics 2004 ;418(2):419-428 10273 UI - 5544 AU - Bramon A AU - Escribano R AU - Martinez JLL AD - Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, SpainUniv Autonoma Barcelona, Fis Teor Grp, E-08193 Barcelona, SpainUniv Autonoma Barcelona, IFAE, E-08193 Barcelona, SpainUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoBramon, A, Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain TI - Scalar meson dynamics in chiral perturbation theory AB - A comparison of the linear sigma model (LsigmaM) and chiral perturbation theory (ChPT) predictions for pion and kaon dynamics is presented. Lowest and next-to-leading order terms in the ChPT amplitudes are reproduced if one restricts to scalar resonance exchange. Some low energy constants of the order p(4) ChPT Lagrangian are fixed in terms of scalar meson masses. Present values of these low energy constants are compatible with the LsigmaM dynamics. We conclude that more accurate values would be most useful either to falsify the LsigmaM or to show its capability to shed some light on the controversial scalar physics MH - Mexico|Guanajuato MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000221253900026 L2 - MULTI-QUARK HADRONS; PI-PI-SCATTERING; ONE-LOOP; PI(-)PI(+)PI(+) DECAY; SYMMETRY-BREAKING; K SCATTERING; FORM-FACTORS; PHI DECAYS; PI(0)PI(0)GAMMA; RESONANCES SO - Physical Review D 2004 ;69(7): 10274 UI - 4519 AU - Brasselet JP AU - Massey D AU - Parameswaran AJ AU - Seade J AD - Inst Math Luminy, UMR 6206, CNRS, F-13288 Marseille 9, FranceNortheastern Univ, Dept Math, Boston, MA 02115, USATata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca 62191, Morelos, MexicoBrasselet, JP, Inst Math Luminy, UMR 6206, CNRS, Campus Luminy,Case 907, F-13288 Marseille 9, France TI - Euler obstruction and defects of functions on singular varieties AB - Several authors have proved Lefschetz type formulas for the local Euler obstruction. In particular, a result of this type has been proved that turns out to be equivalent to saying that the local Euler obstruction, as a constructible function, satisfies the local Euler condition (in bivariant theory) with respect to general linear forms. The purpose of the paper is to determine what prevents the local Euler obstruction from satisfying the local Euler condition with respect to functions which are singular at the considered point. This is measured by an invariant (or 'defect') of such functions. An interpretation of this defect is given in terms of vanishing cycles, which allows it to be calculated algebraically. When the function has an isolated singularity, the invariant can be defined geometrically, via obstruction theory. This invariant unifies the usual concepts of the Milnor number of a function and the local Euler obstruction of an analytic set MH - France MH - India MH - Mexico|Morelos MH - USA PB - LONDON: LONDON MATH SOC RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0024-6107 UR - ISI:000223566300004 L2 - CHERN CLASSES; HOLONOMIC MODULES; SPACE-CURVES; INDEX; FORMULA; FIBERS SO - Journal of the London Mathematical Society-Second Series 2004 ;70():59-76 10275 UI - 4676 AU - Brault AC AU - Powers AM AU - Ortiz D AU - Estrada-Franco JG AU - Navarro-Lopez R AU - Weaver SC AD - Univ Texas, Med Branch, Ctr Biodef & Emerging Infect Dis, Galveston, TX 77555, USAUniv Texas, Med Branch, Dept Pathol, Galveston, TX 77555, USAComis Mexico Estados Unidos Prevenc Fiebre Aftosa, Tuxtla Gutierrez, Chiapas, MexicoWeaver, SC, Univ Texas, Med Branch, Ctr Biodef & Emerging Infect Dis, Galveston, TX 77555 USA TI - Venezuelan equine encephalitis emergence: Enhanced vector infection from a single amino acid substitution in the envelope glycoprotein AB - In 1993 and 1996, subtype IE Venezuelan equine encephalitis (VEE) virus caused epizootics in the Mexican states of Chiapas and Oaxaca. Previously, only subtype IAB and IC VEE virus strains had been associated with major outbreaks of equine and human disease. The IAB and IC epizootics are believed to emerge via adaptation of enzootic (sylvatic, equine-avirulent) strains for high titer equine viremia that results in efficient infection of mosquito vectors. However, experimental equine infections with subtype IE equine isolates from the Mexican outbreaks demonstrated neuro-virulence but little viremia, inconsistent with typical VEE emergence mechanisms. Therefore, we hypothesized that changes in the mosquito vector host range might have contributed to the Mexican emergence. To test this hypothesis, we evaluated the susceptibility of the most abundant mosquito in the deforested Pacific coastal locations of the VEE outbreaks and a proven epizootic vector, Ochlerotatus taeniorhynchus. The Mexican epizootic equine isolates exhibited significantly greater infectivity compared with closely related enzootic strains, supporting the hypothesis that adaptation to an efficient epizootic vector contributed to disease emergence. Reverse genetic studies implicated a Ser --> Asn substitution in the E2 envelope glycoprotein as the major determinant of the increased vector infectivity phenotype. Our findings underscore the capacity of RNA viruses to alter their vector host range through minor genetic changes, resulting in the potential for disease emergence MH - Mexico|Chiapas MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 24 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000223134400030 L2 - VIRUS SUBTYPE IE; ENCEPHALOMYELITIS VIRUS; MOSQUITOS DIPTERA; AEDES-AEGYPTI; SOUTH-AMERICA; NORTH-AMERICA; STRAINS; CULICIDAE; DETERMINANTS; COMPETENCE SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(31):11344-11349 10276 UI - 4058 AU - Braun L AU - Strunz WT AU - Briggs JS AD - Univ Freiburg, Inst Phys, D-79104 Freiburg, GermanyCtr Int Ciencias, Cuernavaca 62131, Morelos, MexicoBraun, L, Univ Freiburg, Inst Phys, Hermann Herder Str 3, D-79104 Freiburg, Germany TI - Classical limit of the interaction of a quantum system with the electromagnetic field AB - The interaction of nonrelativistic matter with the quantized electromagnetic field is investigated in the classical limit of large photon numbers. Quantization of both matter, say an atom, and the field results in a time-independent Schrodinger equation (TISE). However, for very strong fields (quantum mechanically, large photon numbers) this is impractical to solve. The standard approach then is simply to replace the quantized field by a classical field to give a time-dependent Schrodinger equation (TDSE) for the atom alone. Here we show how this TDSE can be derived from the TISE for atom plus field, illustrating at each stage the approximations that are necessary to treat the field classically. An important difficulty at the semiclassical stage is a breakdown of the approximation at classical turning points. We show how the use of coherent field states can circumvent this problem. In the limit that the field can be treated classically, time emerges from the Maxwell equations and a TDSE for the atom alone results MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000224623000145 L2 - ATOMIC COLLISIONS; IMPACT PARAMETER; MECHANICS; APPROXIMATIONS; EXCITATION; PARTICLES SO - Physical Review A 2004 ;70(3): 10277 UI - 6360 AU - Bravo-Alfaro H AU - Brinks E AU - Baker AJ AU - Walter F AU - Kunth D AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, MexicoInst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoCALTECH, Owens Valley Radio Observ, Pasadena, CA 91125, USANatl Radio Astron Observ, Socorro, NM 87801, USAInst Astrophys, F-75014 Paris, FranceBravo-Alfaro, H, Univ Guanajuato, Dept Astron, Apdo Postal 144, Guanajuato 36000, Mexico TI - HI and CO in blue compact dwarf galaxies: Haro 2 and Haro 4 AB - We present Very Large Array H I imaging of two blue compact dwarf galaxies, Haro 2 and Haro 4, and of the spiral galaxy Haro 26, which is projected some 22' southwest of Haro 4. We also show a map of the CO(1-0) distribution of Haro 2 obtained with the Owens Valley Radio Observatory Millimeter Array, as well as derive an upper limit for CO(2-1) emission from Haro 4 obtained with the Caltech Submillimeter Observatory. The H I data of Haro 2 reveal that the kinematical major axis lies perpendicular to the photometric major axis, indicating that the atomic hydrogen rotates about the major axis of the galaxy. This confirms earlier indications based on CCD photometry that Haro 2 is a dust-lane dE rather than a dIrr. We propose that the present neutral and molecular ISM configuration is due to recent gas accretion or a merger. The H I distribution and dynamics of Haro 4 and the neighboring spiral Haro 26 suggest that they are currently undergoing a tidal interaction, reinforcing the notion that interactions play an important role in triggering the star formation witnessed in blue compact galaxies MH - France MH - Mexico|Guanajuato MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000188745300021 L2 - galaxies : dwarf;galaxies : individual (Haro 2, Haro 4, Haro 26);radio lines : galaxies;NEUTRAL HYDROGEN OBSERVATIONS; STAR-FORMING GALAXIES; LYMAN-ALPHA-EMISSION; WOLF-RAYET GALAXIES; I ZW 18; MOLECULAR GAS; SURFACE BRIGHTNESS; CHANDRA OBSERVATIONS; ELLIPTIC GALAXIES; RADIO SUPERNEBULA SO - Astronomical Journal 2004 ;127(1):264-278 10278 UI - 3852 AU - Bravo A AU - Gomez I AU - Conde J AU - Munoz-Garay C AU - Sanchez J AU - Miranda R AU - Zhuang M AU - Gill SS AU - Soberon M AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Calif Riverside, Dept Cell Biol & Neurosci, Riverside, CA 92521, USABravo, A, Univ Nacl Autonoma Mexico, Inst Biotecnol, Apdo Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Oligomerization triggers binding of a Bacillus thuringiensis Cry1Ab pore-forming toxin to aminopeptidase N receptor leading to insertion into membrane microdomains AB - Bacillus thuringiensis Cry1A toxins, in contrast to other pore-forming toxins, bind two putative receptor molecules, aminopeptidase N (APN) and cadherin-like proteins. Here we show that Cry1Ab toxin binding to these two receptors depends on the toxins' oligomeric structure. Toxin monomeric structure binds to Bt-R-1, a cadherin-like protein, that induces proteolytic processing and oligomerization of the toxin (Gomez, L, Sanchez, J., Miranda, R., Bravo A., Soberon, M., FEBS Lett. (2002) 513, 242-246), while the oligomeric structure binds APN, which drives the toxin into the detergent-resistant membrane (DRM) microdomains causing pore formation. Cleavage of APN by phospholipase C prevented the location of Cry1Ab oligomer and Bt-R-1 in the DRM microdomains and also attenuates toxin insertion into membranes despite the presence of Bt-R-1. Immunoprecipitation experiments demonstrated that initial Cry1Ab toxin binding to Bt-R-1 is followed by binding to APN. Also, immunoprecipitation of Cry I Ab toxin-binding proteins using pure oligomeric or monomeric structures showed that APN was more efficiently detected in samples immunoprecipitated with the oligomeric structure, while Bt-R-1 was preferentially detected in samples immunoprecipitated with the monomeric Cry1Ab. These data agrees with the 200-fold higher apparent affinity of the oligomer than that of the monomer to an APN enriched protein extract. Our data suggest that the two receptors interact sequentially with different structural species of the toxin leading to its efficient membrane insertion. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 64 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0005-2736 UR - ISI:000225173800005 L2 - Bacillus thuringiensis;mode of action;aminopeptidase;cadherin;lipid raft;oligomer;BRUSH-BORDER-MEMBRANE; PLANAR LIPID BILAYERS; CADHERIN-LIKE PROTEIN; DROSOPHILA S2 CELLS; MANDUCA-SEXTA; INSECTICIDAL TOXIN; DELTA-ENDOTOXIN; HELIOTHIS-VIRESCENS; CRYSTAL-STRUCTURE; EPITHELIAL-CELLS SO - Biochimica et Biophysica Acta-Biomembranes 2004 ;1667(1):38-46 10279 UI - 6309 AU - Breed MD AU - Guzman-Novoa E AU - Hunt GJ AD - Univ Colorado, Dept Environm Populat & Organism Biol, Boulder, CO 80309, USACENIFMA, INIFAP, Metepec 52140, MexicoPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USABreed, MD, Univ Colorado, Dept Environm Populat & Organism Biol, Boulder, CO 80309 USA TI - Defensive behavior of honey bees: Organization, genetics, and comparisons with other bees AB - One key advantage of eusociality is shared defense of the nest, brood, and stored food; nest defense plays an important role in the biology of cusocial bees. Recent studies on honey bees, Apis mellifera, have focused on the placement of defensive activity in the overall scheme of division of labor, showing that guard bees play a unique and important role in colony defense. Alarm pheromones function in integrating defensive responses; honey bee alarm pheromone is an excellent example of a multicomponent pheromonal blend. The genetic regulation of defensive behavior is now better understood from the mapping of quantitative trait loci (QTLs) associated with variation in defensiveness. Colony defense in other eusocial bees is less well understood, but enough information is available to provide interesting comparisons between A. mellifera and other species of Apis, as well as with allodapine, halictine, bombine, and meliponine bees. These comparative studies illustrate the wide variety of evolutionary solutions to problems in colony defense in the Apoidea MH - USA MH - Mexico|Estado De Mexico PB - PALO ALTO: ANNUAL REVIEWS RP - NOT IN FILE U3 - TC 25 U4 - Entomology U5 - J;Review AV - English IS - 0066-4170 UR - ISI:000188826400013 L2 - communication;division of labor;social insects;Apoidea;pheromones;APIS-MELLIFERA-L; QUANTITATIVE TRAIT LOCI; DIVISION-OF-LABOR; PRIMITIVELY SOCIAL BEE; COLONY DEFENSE; NESTMATE RECOGNITION; ALARM PHEROMONE; STINGLESS BEE; JUVENILE-HORMONE; XYLOCOPA-PUBESCENS SO - Annual Review of Entomology 2004 ;49():271-298 10280 UI - 5300 AU - Breger M AU - Rodler F AU - Pretorius ML AU - Martin-Ruiz S AU - Amado PJ AU - Costa V AU - Garrido R AU - de Coca PL AU - Olivares I AU - Rodriguez E AU - Rolland A AU - Tshenye T AU - Handler G AU - Poretti E AU - Sareyan JP AU - Alvarez M AU - Kilmartin PM AU - Zima W AD - Univ Vienna, Inst Astron, A-1180 Vienna, AustriaUniv Cape Town, Dept Astron, ZA-7700 Rondebosch, South AfricaOsserv Astron Brera, INAF, I-23807 Merate, ItalyCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainUniv NW, Mmabatho, South AfricaS African Astron Observ, ZA-7935 Cape Town, South AfricaObserv Cote Azur, F-0634 Nice 4, FranceUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Canterbury, Dept Phys & Astron, Mt John Univ Observ, Christchurch 1, New ZealandBreger, M, Univ Vienna, Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria TI - The delta Scuti star FG Vir. - V. The 2002 photometric multisite campaign AB - A high-accuracy multisite campaign was caffied out from 2002 January to May with a photometric coverage of 398 h at five observatories. The concentration on a few selected sites gives better consistency and accuracy than collecting smaller amounts from a larger number of sites. 23 frequencies were detected with a high statistical significance. 6 of these are new. The 17 frequencies found in common with the 1992-1995 data are the modes with highest amplitudes. This indicates that the pulsation spectrum of FG Vir is relatively stable over the ten-year period. Two frequencies have variable amplitudes and phases from year to year as well as during 2002. These were both found to be double modes with close frequencies. For the mode at 12.15 c/d this leads to an apparent modulation with a time scale of similar to129 d. The close frequencies at 12.15 c/d are composed of a radial and a nonradial mode, suggesting a similarity with the Blazhko Effect seen in RR Lyrae stars MH - Austria MH - France MH - Italy MH - Mexico|Distrito Federal MH - New Zealand MH - South Africa MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000221886800031 L2 - stars : variables : delta Sct;stars : oscillations;stars : individual : FG Vir;techniques : photometric;4 CANUM-VENATICORUM; PULSATION FREQUENCIES; MODE-IDENTIFICATIONS; VIRGINIS SO - Astronomy & Astrophysics 2004 ;419(2):695-701 10281 UI - 3833 AU - Breniere SF AU - Pietrokosky S AU - Gastelum EM AU - Bosseno MF AU - Soto MM AU - Ouaissi A AU - Kasten FL AU - Wisnivesky-Colli C AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Unidad Ecol Reservorios & Vectores Parasitos, Dept Ecol Genet & Evoluc, RA-1428 Buenos Aires, DF, ArgentinaInst Rech Dev, UR08, F-34394 Montpellier, FranceUniv Guadalajara, Ctr Univ Ciencias Salud, Dept Salud Publ, Guadalajara, Jalisco, MexicoBreniere, SF, Inst Rech Dev, UR08, 911 Av Agropolis,BP 64501, F-34394 Montpellier, France TI - Feeding patterns of Triatoma longipennis Usinger (Hemiptera, Reduviidae) in peridomestic habitats of a rural community in Jalisco State, Mexico AB - We analyzed triatomine blood feeding patterns to evaluate the role of peridomiciles in Trypanosoma cruzi transmission at the rural village of Tepehuaje de Morelos at Jalisco State, Mexico (1999). A total of 206 bugs were collected in 11 out of 26 households (42.3%). Nymphs predominated in the collections (64.9% of the total). Except for one Triatoma barberi female, a species that belongs to the protracta species complex, all adults were Triatoma longipennis, a species of the phyllosoma complex. Triatomines were exclusively present in peridomestic sites mainly piles of tiles and bricks, and none were found indoors. Overall infection rate was 56.6% and no significant differences (P > 0.05) were observed between nymphs and adults or mates and females. Identified blood meals were chicken (29.4%), opossum (20.9%), pig (24.5%), murid (20.9%), dog (3.5%), and armadillo (0.7%). No gut content reacted against anti-human, anti-bovine, anti-rabbit, and anti-cat sera. In contrast to fifth nymphs and adults, 87% of the small nymphs fed on one host, indicating that they are less mobile than other stages. Most fifth nymphs and adults fed on domestic hosts, while small nymphs mainly fed on opossum and murid. infection blood-meal indexes were around 50% for single meals on opossum and murid, stressing their importance as trypanosome donors. Peridomiciles in Tepehuaje could be regarded as interaction sites among domestic and wild and synanthropic mammals and triatomines, which would facilitate circulation of the same T cruzi strains between domestic and sylvatic cycles. Stone-made walls and building materials, which hold synanthropic rodents and opossums, should be considered as targets for vector control measures MH - Argentina MH - France MH - Mexico|Jalisco PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000225274700003 L2 - Triatoma longipennis;peridomestic habitat;feeding patterns;Mexico;TRYPANOSOMA-CRUZI KINETOPLASTIDA; TRANSMISSION; ARGENTINA; DIMIDIATA; INFESTANS; BRAZIL SO - Journal of Medical Entomology 2004 ;41(6):1015-1020 10282 UI - 4841 AU - Bretherton CS AU - Uttal T AU - Fairall CW AU - Yuter SE AU - Weller RA AU - Baumgardner D AU - Comstock K AU - Wood R AU - Raga GB AD - Univ Washington, Dept Atmospher Sci, Seattle, WA 98195, USANOAA, Environm Technol Lab, Boulder, CO, USAWoods Hole Oceanog Inst, Woods Hole, MA 02543, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoBretherton, CS, Univ Washington, Dept Atmospher Sci, Box 351640, Seattle, WA 98195 USA TI - The EPIC 2001 stratocumulus study AB - Overlaying the cool southeast Pacific Ocean is the most persistent subtropical stratocumulus cloud deck in the world. It produces a profound affect on tropical climate by shading the underlying ocean and radiatively cooling and stirring up turbulence in the atmosphere. In October 2001, the East Pacific Investigation of Climate undertook an exploratory cruise from the Galapagos Islands to Chile. The cruise gathered an unprecedented dataset, integrating radiosonde, surface, cloud remote sensing, aerosol, and ocean measurements. Scientific objectives included measuring the vertical structure of the ABL in this region, understanding what physical processes are determining the stratocumulus cloud albedo, and understanding the fluxes of heat and water that couple the atmosphere and ocean in this region. An unexpectedly well-mixed stratocumulus-capped boundary layer as a result of a strong inversion was encountered throughout. A strong diurnal cycle was observed, with thicker clouds and substantial drizzle (mainly evaporating above the sea surface) during the late night and early morning. This was driven in part by local diabatic processes, and was reinforced by a surprisingly pronounced diurnal cycle of vertical motion. The vertical motion appears to be an inertia-gravity wave driven by daytime heating over South America that propagates over 1000 km offshore. Much more nocturnal drizzle and pronounced mesoscale cellularity were observed in "clean" conditions when cloud droplet concentrations and aerosol concentrations were low. Entrainment of dry, warm air is inferred to be the primary regulator of cloud thickness in this region, but drizzle also appears to have a large indirect impact by inhibiting and changing the spatial organization of turbulence MH - Mexico|Distrito Federal MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 45 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0003-0007 UR - ISI:000222987500016 L2 - MARINE BOUNDARY-LAYER; DIURNAL CYCLE; FRACTIONAL CLOUDINESS; PACIFIC; AEROSOLS; CLOUDS; PRECIPITATION; CIRCULATION; SIMULATIONS; MODEL SO - Bulletin of the American Meteorological Society 2004 ;85(7):967-+ 10283 UI - 3352 AU - Brinks E AD - INAOE, Puebla, MexicoBrinks, E, Univ Hertfordshire, Sch Phys Astron & Math, Hatfield AL10 9AB, Herts, England TI - The ISM in nearby galaxies AB - The SKA will revolutionise the study of the principles underlying star formation (SF), resolving interstellar cloud complexes which are the birthplaces of stars and answering such questions as which are the sufficient and necessary conditions for SF to commence. Also, massive SF is intimately related to stellar death. The SKA will be able to study the structure of the ISM at 100 pc resolution out to distances of up to 20 Mpc and will quantify the impact the demise of massive stars has on their environment. Importantly, the SKA will probe the transition region between ISM and IGM, linking star formation and stellar death in the disks of galaxies to faint HI structures further afield, such as "anomalous gas" and (Compact) High Velocity Clouds. Lastly, the superb sensitivity of the SKA will result in some hundred background sources per square degree against which HI absorption lines can be searched for, probing not only the relative importance of the different phases of the gas in galaxies but also the low density gas in the outskirts and between galaxies. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1387-6473 UR - ISI:000226146800031 L2 - LARGE-MAGELLANIC-CLOUD; HIGH-VELOCITY CLOUDS; H-I; INTERSTELLAR-MEDIUM; APERTURE SYNTHESIS; DWARF GALAXIES; GALACTIC DISKS; M31; GAS SO - New Astronomy Reviews 2004 ;48(11-12):1305-1310 10284 UI - 5040 AU - Brito-Arias M AU - Pereda-Miranda R AU - Heathcock CH AD - Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720, USAInst Politecn Nacl, Unidad Profess Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoNatl Autonomous Univ Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoHeathcock, CH, Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA TI - Synthesis of tricolorin F AB - A hetero-trisaccharide resin glycoside of jalapinolic acid known as tricolorin F has been synthesized. The approach involved the preparation of intermediate 5 and a subsequent coupling reaction with imidate 6 to produce disaccharide 7, which after deacetylation generated intermediate 8. A further coupling between this glycosyl acceptor and the quinovose glycosyl donor 9 resulted in the formation of the tricoloric acid C derivative 10. Basic hydrolysis afforded the intermediate 11, which was subsequently lactonized under Yamaguchi conditions to produce protected macrolactone 12. Removal of acetonide and. benzyl protecting groups afforded pure tricolorin F (1) MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000222449200001 L2 - IPOMOEA-TRICOLOR; CONVOLVULACEAE; RESIN SO - Journal of Organic Chemistry 2004 ;69(14):4567-4570 10285 UI - 5056 AU - Bromberg AS AU - Medina BA AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Montpellier 2, Dept Math, F-34095 Montpellier 5, FranceBromberg, AS, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, Mexico TI - Geometry of oscillator groups and locally symmetric manifolds AB - Medina and Revoy gave in ( Medina and Revoy, Manuscripta Math. 52 ( 1985) 81 95) a rich class of examples of Lorentzian homogeneous, compact manifolds. These manifolds, the oscillator manifolds, are quotients of the so-called oscillator groups by lattices. Except for the 'nice' quotients of SL(2, R), these manifolds are roughly the only Lorentzian, homogeneous manifolds of finite volume, with non-compact group of isometries (Adams and Stuck, Invent. Math. 129 ( 1997) 239 - 261; Zhegib, Sur les espaces-temps homogenes, Ecole Normale, Lyon, 1995). In this paper we exhibit new locally symmetric structures on the oscillator manifolds. These structures are obtained from explicit pseudo-Riemannian, locally symmetric, left-invariant metrics and from a. ne structures on the oscillator groups. Other examples of locally symmetric manifolds are provided by the determination of the group of isometries of the oscillator groups MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0046-5755 UR - ISI:000222388600007 L2 - oscillator groups;geodesically complete manifolds;locally symmetric pseudo-Riemannian structures;locally affine manifolds;COMPACT LORENTZ MANIFOLD; ISOMETRY GROUP; LIE-ALGEBRAS SO - Geometriae Dedicata 2004 ;106(1):97-111 10286 UI - 5200 AU - Bronnikov KA AU - Fadeev SB AU - Michtchenko AV AD - VNIIMS, Moscow 117313, RussiaPFUR, Inst Gravitat & Cosmol, Moscow 117198, RussiaIPN, SEPI ESIME, Mexico City 07738, DF, MexicoBronnikov, KA, VNIIMS, 3-1 M Ulyanovoy St, Moscow 117313, Russia TI - On spherically symmetric minimally coupled brane worlds AB - For a static, spherically symmetric brane in the framework of the RS2 concept, we study the conditions under which the 4D tensor E-muv, arising from the 5D Weyl tensor, vanishes on the brane. Gravity on the brane is then decoupled from the bulk geometry, it is the so-called minimally coupled brane world (MCBW). Assuming E-muv = 0 in the whole bulk, we try to solve the 5D Einstein equations G(AB) + Lambda(5gAB) = 0 and obtain an overdetermined set of equations for functions of the radial coordinate. Some special solutions are found, among which are the well-known "black string" solution with the Schwarzschild metric on the brane and its generalizations with Schwarzschild-(A)dS on-brane metrics. It is concluded that a MCBW can be embedded, in general, in a bulk where E-mu(v) is not identically zero but only vanishes on the brane. We also present some previous results on the general properties of scalar fields on the brane and give an example of a wormhole supported by a scalar field in a MCBW MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000222091100003 L2 - multidimensional gravity;brane world;scalar field;black hole;BARYON NUMBER; BLACK HOLES; NO-HAIR; NONEXISTENCE; DIMENSIONS; THEOREMS; GRAVITY SO - General Relativity and Gravitation 2004 ;36(7):1527-1535 10287 UI - 5384 AU - Bronnikov KA AU - Fadeev SB AU - Michtchenko AV AD - VNIIMS, Moscow 117313, RussiaPFUR, Inst Gravitat & Cosmol, Moscow 119319, RussiaIPN, SEPI ESIME, Mexico City 07738, DF, MexicoBronnikov, KA, VNIIMS, 3-1 M Ulyanovoy St, Moscow 117313, Russia TI - Scalar field in a minimally coupled brane world: No-hair and other No-Go theorems AB - In the brane-world framework, we consider static, spherically symmetric configurations of a scalar field with the Lagrangian (partial derivativephi)(2)/2 - V(phi), confined on the brane. We use the 4D Einstein equations on the brane obtained by Shiromizu et al., containing the conventional stress tensor T-mu(upsilon), the tensor Pi(mu)(upsilon) which is quadratic in T-mu(upsilon) and E-mu(upsilon) describing interaction with the bulk. For models under study, the tensor Pi(mu)(upsilon) has zero divergence, allowing one to consider E-mu(upsilon) = 0. Such a brane, whose 4D gravity is decoupled from the bulk geometry, may be called minimally coupled. Assuming E-mu(upsilon) = 0, we try to extend to brane worlds some theorems valid for scalar fields in general relativity (GR). Thus, the list of possible global causal structures in all models under consideration is shown to be the same as is known for vacuum with a cosmological constant in GR: Minkowski, Schwarzschild, (anti-) de Sitter and Schwarzschild-(anti-)de Sitter. A no-hair theorem, saying that, given a potential V greater than or equal to 0, asymptotically flat black holes cannot have nontrivial external scalar fields, is proved under certain restrictions. Some objects, forbidden in GR, are allowed on the brane, e.g, traversable wormholes supported by a scalar field, but only at the expense of enormous matter densities in the strong field region MH - Mexico|Distrito Federal MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0218-2718 UR - ISI:000221683600002 L2 - Brane world;scalar field;black holes;causal structure;CONFORMAL CONTINUATIONS; BARYON NUMBER; BLACK HOLES; DIMENSIONS; GRAVITY; NONEXISTENCE; MILLIMETER; HIERARCHY; FORCES SO - International Journal of Modern Physics D 2004 ;13(4):593-606 10288 UI - 6279 AU - Brooks SD AU - Toon OB AU - Tolbert MA AU - Baumgardner D AU - Gandrud BW AU - Browell EV AU - Flentje H AU - Wilson JC AD - Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAUniv Colorado, Program Atmospher & Ocean Sci, Boulder, CO 80309, USAUniv Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNatl Ctr Atmospher Res, Boulder, CO 80307, USANASA, Langley Res Ctr, Hampton, VA 23681, USADeutsch Zentrum Luft & Raumfahrt, Inst Phys Atnosphare, D-82237 Wessling, GermanyUniv Denver, Dept Engn, Denver, CO 80208, USABrooks, SD, Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA TI - Polar stratospheric clouds during SOLVE/THESEO: Comparison of lidar observations with in situ measurements AB - Polar stratospheric clouds (PSCs) were observed on several flights during the 1999/2000 SOLVE/THESEO mission. Here we present an analysis of PSC size distribution, composition, and particle phase based on near coincident measurements using the Multiangle Aerosol Spectrometer Probe (MASP) and Focused Cavity Aerosol Spectrometer (FCAS III) on board the ER-2 as well as lidar instruments on board the DC-8 and Falcon aircrafts. We calculate the aerosol backscatter ratios and aerosol depolarization ratios at infrared and visible wavelengths based on the particle size distributions measured by the MASP and FCAS III instruments. We then compare our calculations to observed lidar measurements taken from on board the DC-8 and Falcon aircraft, which flew the same flight paths as the ER-2 on 20 January and 3 February 2000, respectively. Our comparison shows that calculations based on the mixed clouds containing small (submicrometer) spherical particles and large (2.5-22 mm diameter) nonspherical particles seen by the FCAS III and MASP are consistent with lidar observations. Our analysis shows that the infrared aerosol depolarization ratio must be measured to detect and identify mixed PSC clouds and that relying only on measurements of depolarization in the visible causes incorrect identification of mixed clouds as solution droplets. This study suggests that mixed clouds of supercooled ternary solutions were observed in coexistence with larger solid nitric acid hydrate particles MH - USA MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000188867400001 L2 - polar stratospheric cloud;MASP;lidar;SOLVE;mixed-phase clouds;LARGE HNO3-CONTAINING PARTICLES; NITRIC-ACID TRIHYDRATE; ARCTIC STRATOSPHERE; SULFURIC-ACID; REFRACTIVE-INDEXES; LIQUID PARTICLES; VAPOR-PRESSURES; PHYSICAL STATE; AEROSOL; WINTER SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D2): 10289 UI - 4821 AU - Brostow W AU - Walasek J AD - Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUNAM, CFATA, Queretaro, MexicoTech Univ Radom, Dept Phys, PL-26600 Radom, PolandBrostow, W, Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203 USA TI - A statistical-mechanical model of polymer liquid crystals subjected to external deformations AB - We consider the nematiclike system of polymer liquid crystal (PLC) macromolecules represented by the Flory semiflexible chain model. Segments of the flexible (F) spacers are shorter than the LC hard-rod sequences. We investigate effects of imposition of external deformations. The behavior of LC sequences is largely governed by orienting interactions while for F spacers the short-range interactions determined by the chemical structure are the most important. The stress-strain relation is obtained in addition to the orientation-deformation relations. Orientational order phase transitions caused by the external deformations of the system are recognized and described. (C) 2004 American Institute of Physics MH - Mexico|Queretaro MH - Poland MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000222995300046 L2 - RUBBER-LIKE ELASTICITY; THERMODYNAMICS; PHASE; PARTICLES; MIXTURES; SYSTEMS; CHAINS SO - Journal of Chemical Physics 2004 ;121(7):3272-3281 10290 UI - 5607 AU - Brostow W AU - Darmarla G AU - Howe J AU - Pietkiewicz D AD - Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, CFATA, Queretaro 76001, MexicoPietkiewicz, D, Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203 USA TI - Determination of wear of surfaces by scratch testing AB - We have formulated a quantitative definition of wear different from the current imprecise definitions. Wear is defined as the unwanted loss of solid material from solid surfaces due to mechanical interaction. The debris method currently used to quantify wear produces results strongly dependent on conditions. We have performed multiple scratch tests for a variety of polymer samples: polypropylene, polytetrafluoroethylene and a polyester. In each of the materials studied, the scratch penetration depths reach a constant value at a given force after 8 scratches or so. Similarly, the scratch recovery (final, healing) depths for a fixed force reach a plateau after a dozen or so scratch tests. Thus, strain hardening by repetitive scratching takes place. A likely explanation is formation of a more ordered phase-as seen before in mechanical tests by Siegmann, Aharoni, Faitelson et al. Given these results we define a measure of wear W(F) for a given indenter geometry and force F as W(F) = lim(n-->infinity) R-h(F) where n is the number of tests performed and Rh is the final (residual, healing) depth after viscoelastic recovery. The present results confirm also our earlier ones that scratch recovery is another useful way to characterize viscoelasticity MH - USA MH - Mexico|Queretaro PB - STRASBOURG: EUROPEAN POLYMER FEDERATION RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 1618-7229 UR - ISI:000221185400001 L2 - SCATTERING SO - E-Polymers 2004 ;(): 10291 UI - 6199 AU - Brostow W AU - Castano VM AU - Martinez-Barrera G AU - Pietkiewicz D AD - Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, CFATA, Queretaro 76001, Qro, MexicoUniv Autonoma Estado Mexico, Posgrado Fac Quim, Toluca 50000, Estado Mexico, MexicoBrostow, W, Univ N Texas, Dept Mat Sci & Engn, LAPOM, POB 305310, Denton, TX 76203 USA TI - Pressure-volume-temperature properties of an epoxy plus fluorinated poly(aryl ether ketone) system AB - Fluorinated poly(aryl ether ketone) (12F-PEK) + a commercial epoxy resin system was studied. The samples had 0, 5, 10, 20, 30, 40 and 50 wt% of the fluoropolymer and were cured at either 24degreesC or 70degreesC. Pressure-volume-temperature (P-V-T) results were obtained for pressures up to 200 J/cm(3) and temperatures up to 150degreesC or so. The P*, V* and T* parameters of the Hartmann equation of state were obtained from the experimental data. Increasing either the fluoropolymer concentration or the curing temperature results first in a decrease in specific (and also free) volume, then in an increase caused by phase inversion and finally in a decrease caused by increased concentration of the fluoropolymer. According to previous studies [Polymer 42 (2001) 7971], the phase inversion exists at low fluoropolymer concentrations, where the lowest free surface energy of 12F-PEK is achieved. Additionally, at this point we find a minimal free volume. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000189038200029 L2 - epoxy resin;fluoropolymer;pressure volume-temperature properties;TRIBOLOGICAL PROPERTIES; FLUOROPOLYMER ADDITION; SHIFT FACTOR; POLYMERS; EQUATION; STRESS; STATE; TIME SO - Physica B-Condensed Matter 2004 ;344(1-4):206-213 10292 UI - 6481 AU - Brostow W AU - Castano VM AU - Horta J AU - Martinez-Barrera G AD - Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, CFATA, Queretara 76001, MexicoUniv Autonoma Queretaro, Fac Ingn, Queretara 76010, MexicoUniv Autonoma Estado Mexico, Fac Quim, Mexico City 50000, DF, MexicoBrostow, W, Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203 USA TI - Gamma irradiation effects on impact strength and thermal properties of SBR-toughened polystyrene AB - Effects of chemical structure, composition, thermal stability and molecular weights of the rubber phase in amorphous polystyrene + styrene/butacliene rubber (SBR) blends on impact behavior were investigated. Blends with 5, 10 and 13 wt. % of SBR embedded into a rigid polystyrene matrix were prepared as well as the samples without SBR. For all blends the Izod impact tests were performed and those with the best impact strength values were submitted to gamma irradiation. The Izod impact tests of the irradiated samples were then performed. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) runs were made for both irradiated and not-irradiated blends. Blends compositions with the highest impact energies have been defined. Gamma irradiation initially enhances the impact energies but then reaches a maximum around 150 kGy above which the impact strength eventually becomes lower than in the samples not subjected to irradiation MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - WARSAW: INDUSTRIAL CHEMISTRY RESEARCH INST RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-2725 UR - ISI:000187937500002 L2 - polystyrene;SBR;polymer blends;gamma irradiation;impact strength;thermal properties;PARTICLE-SIZE; HIPS SO - Polimery 2004 ;49(1):9-14 10293 UI - 6578 AU - Brown-Guedira GL AU - Warburton ML AU - Nelson RL AD - Kansas State Univ, Throckmorton Plant Sci Ctr 2001, Plant Sci & Entomol Res Unit, Agr Res Serv, Manhattan, KS 66506, USACIMMYT, Appl Biotechnol Ctr, Mexico City, DF, MexicoUniv Illinois, Dep Crop Sci, Soybean Maize Germplasm Pathol & Genet Res Unit, Urbana, IL 61801, USANelson, RL, Kansas State Univ, Throckmorton Plant Sci Ctr 2001, Plant Sci & Entomol Res Unit, Agr Res Serv, Manhattan, KS 66506 USA TI - Registration of LG92-1255, LG93-7054, LG93-7654, and LG93-7792 soybean germplasm MH - USA MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000187633900061 L2 - MARKERS; RAPD SO - Crop Science 2004 ;44(1):356-357 10294 UI - 5013 AU - Brown GG AU - Moreno AG AU - Barois I AU - Fragoso C AU - Rojas P AU - Hernandez B AU - Patron JC AD - Inst Ecol, Dept Biol Suelos, Xalapa 91000, Veracruz, MexicoUniv Complutense Madrid, Fac Biol, Dept Anim Biol 1, E-28040 Madrid, SpainUniv Autonoma Puebla, Ctr Vinculac, Puebla 72540, Pue, MexicoBrown, GG, EMBRAPA Soja, CP 231, BR-86001970 Londrina, PR, Brazil TI - Soil macrofauna in SE Mexican pastures and the effect of conversion from native to introduced pastures AB - A large area in the Gulf Coast region of Mexico is pastureland, generally dominated by native grass species, yet little is known of the physical, chemical and biological characteristics and limitations of soils beneath them. Furthermore, nothing is known of the effect of converting native to introduced grasses on the soil ecosystem in Mexican pastures. Over the last 30 years 60 samples were taken in 21 sites throughout SE Mexico to evaluate soil macrofauna communities. Of these, 15 samples were taken at five sites in the state of Veracruz, Mexico, taken during the dry (April-May) and/or wet (September-October) seasons of 1998 and 1999, to specifically compare soil macrofauna present in native and introduced pastures. These sites were located in a N-S transect including three biogeographic regions, separated by the transverse Neo-volcanic axis. Taking data from all sites, earthworms, ants and termites dominated in terms of density, while earthworms dominated the soil fauna biomass, commonly surpassing the weight of the grazing cattle per hectare. Of a total of 15 comparisons of soil fauna populations in native and introduced pastures, important differences in the communities were observed on nine occasions, using multivariate analyses. These differences, however, depended on the site sampled, season, and sample year, and tended to be more evident in the rainy season, when populations were at their maximum numbers. Earthworm communities were different between the two pasture types; twice as many species on average were found in native (four species) than in introduced (two species) pastures. Most species were native to Mexico, only a few exotics being found, indicating slow exotic species invasion rates or little replacement of natives by exotics. In conclusion, the present study showed that large communities of soil macrofauna are present in SE Mexican pastures and that, depending on the site's characteristics and the management practices implemented, the conversion of native to introduced pastures can significantly alter the diversity and abundance of soil-dwelling macro-invertebrates. However, further studies must be undertaken in other pastures, particularly well-managed introduced pastures with or without legume associations, to assess whether these results hold true under a wider range of management situations and sites. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Puebla MH - Mexico|Veracruz MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000222490600006 L2 - macrofauna;earthworms;diversity;native and introduced pastures;Veracruz SO - Agriculture Ecosystems & Environment 2004 ;103(2):313-327 10295 UI - 4440 AU - Bruckshaw R AU - Jeans R AU - Arriaga JCC AU - Keer-Rendon A AU - Wilson G AU - Devonshire R AD - Univ Sheffield, Dept Chem, High Temp Sci Labs, Sheffield S3 7HF, S Yorkshire, England. CIMAV, Chihuahua 31109, Chih, Mexico. Cavendish Instruments Ltd, Sheffield S10 2QD, S Yorkshire, England TI - Multiple species spatial distributions in operating halogen lamps; an experimental and modelling study MH - United Kingdom MH - Mexico|Chihuahua T3 - LIGHT SOURCES 2004Institute of physics conference series PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U4 - Physics, Multidisciplinary U5 - S;Article NT - SEnglishArticler.devonshire@shef.ac.uk0DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLANDINSTIT PHYS CONFER SERBAU82 AV - English IS - 0951-3248 UR - ISI:000223655300022 SO - 2004 ;(182):155-156 10296 UI - 4530 AU - Buch A AU - Glavin DP AU - Szopa C AU - Meunier D AU - Coscia D AU - Sternberg R AU - Cabane M AU - Navaro-Gonzalez R AU - Raulin F AU - Mahaffy PR AD - NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Paris 12, CNRS, LISA, F-94010 Creteil, FranceCNRS, Serv Aeron, F-91371 Verrieres Le Buisson, FranceNatl Autonomous Univ Mexico, Lab Quim Plasma & Estudio Planetarios, Mexico City 04510, DF, Mexico TI - Amino and carboxylic acids in a Mars soil analogue from the Atacama desert MH - France MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Meeting Abstract AV - English IS - 0016-7037 UR - ISI:000221923401449 SO - Geochimica et Cosmochimica Acta 2004 ;68(11):A806-A806 10297 UI - 3734 AU - Buenabad-Chavez J AU - Muller HL AU - Stallard PWA AU - Warren DHD AD - CINVESTAV, Secc Computac, Mexico City 07360, DF, MexicoUniv Bristol, Dept Comp Sci, Bristol BS8 1UB, Avon, EnglandBuenabad-Chavez, J, CINVESTAV, Secc Computac, Ap Postal 14-740, Mexico City 07360, DF, Mexico TI - The diffusion space of data diffusion architectures AB - Data diffusion architectures (also known as cache only memory architectures) provide a shared address space using physically distributed main memory that is associative. The associative nature of main memory decouples each address and its data item from any physical location, allowing data items to diffuse, or migrate and replicate, in any node of main memory according to use. Hence remote accesses tend to become local accesses, making the distributed organisation of main memory transparent to software. However, for data to diffuse effectively with reasonable performance, a fraction of main memory must be reserved as diffusion space, to allow for data replication and freedom of data migration. At any moment the amount of distinct data resident in main memory must be less than the capacity of main memory. Otherwise data will keep moving around the interconnect medium and memory nodes, possibly continually displacing data in frequent use by the processors, resulting in poor performance. We present an analysis of the issues in the provision of diffusion space using empirical data from a realistic environment. Our experimental platform is a multiprocessor emulation of a data diffusion architecture that includes the virtual memory component of the Mach operating system. For flexibility in the provision of diffusion space in the context of set-associative memory, our results suggest the need for a simple interaction between virtual memory software and the data diffusing hardware. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0167-8191 UR - ISI:000225507700001 L2 - Cache only memory architectures (COMA);scalable shared memory multiprocessors;data diffusion architectures;diffusion space SO - Parallel Computing 2004 ;30(11):1169-1193 10298 UI - 4087 AU - Buendia FSB AU - Barron-Adame JM AU - Vega-Corona A AU - Andina D AD - Univ Politecn Madrid, Dept Senales Sistemas & Radiocomunicaciones, ETSI, Madrid, SpainUniv Guanajuato, FIMEE, Guanajuato, MexicoBuendia, FSB, Univ Politecn Madrid, Dept Senales Sistemas & Radiocomunicaciones, ETSI, Madrid, Spain TI - Improving GRNNs in CAD systems AB - Different Computer Aided Diagnosis (CAD) systems have been recently developed to detect micro calcifications (MCs) in digitalized mammography, among other techniques, applying General Regression Neural Networks (GRNNs), or Blind Signal Separation techniques. The main problem of GRNNs to achieve an optimal classification performance, is fitting the kernel parameters (KPs). In this paper we present two novel algorithms to fit the KPs, that have been successfully applied in our CAD system achieving an improvement in the classification rates. Important remarks about the application of Gradient Algorithms (GRDAs) are assessed. We make a brief introduction to our CAD system comparing it to other architectures designed to detect MCs MH - Mexico|Guanajuato MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224375800021 L2 - NEURAL-NETWORKS SO - Independent Component Analysis and Blind Signal Separation 2004 ;3195():160-167 10299 UI - 5681 AU - Bueno-Baques D AU - Hernandez EP AU - Matutes-Aquino J AU - Rezende SM AU - Cornejo DR AD - Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, BrazilCIMAV, Chihuahua 31109, MexicoCornejo, DR, Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil TI - Study of magnetization reversal in hybrid magnets AB - A study of magnetic interactions and magnetization reversal at room temperature in hybrid magnets consisting of micrometrics particles of strontium ferrite and Magnequench MQP-Q alloy was carried out. Materials with three different compositions were considered. These materials present different intensity of coupling between their components. In each case, the evolution of the DCD reversible (M-rev) and irreversible (M-irr) magnetization components during the magnetization and the demagnetization processes was determined. M-rev(M-irr)(Hi) curves were built, being H-i the internal field of the sample. In order to investigate the nature of the magnetic interactions between the different grains, a study of the deltaM(d)(H-i) plots was developed. The experimental behavior of the M-rev(M-irr)(Hi) curves suggest the existence of a complex non-uniform mechanism for the magnetization reversal in these materials. The deltaM(d)(H-i) plots shown a notable predominance of the demagnetizing-like magnetostatic interactions. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Chihuahua PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500040 L2 - hybrid magnets;magnetization reversal;magnetic interactions;IRREVERSIBLE MAGNETIZATION; INTERRELATION SO - Journal of Alloys and Compounds 2004 ;369(1-2):158-161 10300 UI - 3816 AU - Bueno-Soria J AU - Holzenthal RW AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Minnesota, Dept Entomol, St Paul, MN 55108, USABueno-Soria, J, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Apdo Postal 70-153, Mexico City 04510, DF, Mexico TI - New species of the genus Ochrotrichia mosely (Trichoptera : Hydroptilidae) from Mexico and Panama AB - Twenty one new species of the genus Ochrotrichia Mosely are described and the male genitalia of Ochrotrichia affinis, O. alargada, O. amorfa, O. bractea, O. catarina, O. citra, O. compacta, O. cuspidatus, O. delgada, O. indefinida, O. involuta, O. ixtlahuaca, O. leona, O. regiomantana, O. spina, O. spinula, O. unicornia, O. yavesia, from Mexico and O. assita, O. curvata and O. longispina, from Panama are illustrated. O. aldama (Mosely) is recorded for the first time for Panama MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: AMER ENTOMOL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0002-8320 UR - ISI:000225236400009 L2 - Trichoptera;Hydroptilidae;Mexico;Panama;new species;Ochrotrichia;AQUATIC INSECTS; AMERICA SO - Transactions of the American Entomological Society 2004 ;130(2-3):245-269 10301 UI - 4360 AU - Buenrostro-Gonzalez E AU - Lira-Galeana C AU - Gil-Villegas A AU - Wu JZ AD - Inst Mexicano Petr, Thermodynam Res Lab, Mexico City 07730, DF, MexicoUniv Guanajuato, Inst Phys, Guanajuato 37150, MexicoUniv Calif Riverside, Bourns Coll Engn, Dept Chem Engn, Riverside, CA 92521, USALira-Galeana, C, Inst Mexicano Petr, Thermodynam Res Lab, Mexico City 07730, DF, Mexico TI - Asphaltene precipitation in crude oils: Theory and experiments AB - The precipitation of asphaltenes in two Mexican crude oils was measured using a combination of high-pressure isothermal expansion and atmospheric titration with n-alkanes. Experiments were carried out from the live- and tank-oil type of samples of the same crude oils. For the oils investigated, compositional data, precipitation phase diagrams, and bubble point pressures are reported. A theoretical study for these systems was performed using the statistical association fluid theory for potentials of variable range (SAFT-VR) equation of state (EOS) in the framework of the McMillan-Mayer theory. By matching a single titration curve or two precipitation onset points with this EOS, a good prediction of asphaltene precipitation over wide temperature, pressure, and composition intervals is obtained. (C) 2004 American Institute of Chemical Engineers MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0001-1541 UR - ISI:000224106300020 L2 - thermodynamic model;liquid-liquid equilibria;asphaltene precipitation;SAFT-VR EOS;EQUATION-OF-STATE; ASSOCIATING FLUID THEORY; VARIABLE RANGE; PHASE-BEHAVIOR; MULTIPHASE EQUILIBRIUM; PETROLEUM FLUIDS; CHAIN MOLECULES; SAFT EQUATION; MIXTURES; PRESSURE SO - Aiche Journal 2004 ;50(10):2552-2570 10302 UI - 3494 AU - Bugeaud Y AU - Luca F AD - Univ Strasbourg 1, F-67084 Strasbourg, FranceUniv Nacl Autonoma Mexico, Morelia, Michoacan, MexicoBugeaud, Y, Univ Strasbourg 1, 7,Rue Rene Descartes, F-67084 Strasbourg, France TI - A quantitative lower bound for the greatest prime factor of (ab+1) (bc+1) (ca+1) MH - France MH - Mexico|Michoacan PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0065-1036 UR - ISI:000226249000003 L2 - ARITHMETIC PROGRESSIONS; (AB+1)(BC+1)(CA+1); (AB+1)(AC+1)(BC+1); INTEGERS; NUMBERS SO - Acta Arithmetica 2004 ;114(3):275-294 10303 UI - 5722 AU - Bulit C AU - az-Avalos C AU - Montagnes DJS AD - Univ Autonoma Metropolitana Xochimilco, Dept El Hombre & Ambiente, Mexico City 04960, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoUniv Liverpool, Sch Biol Sci, Liverpool L69 7ZB, Merseyside, EnglandBulit, C, Univ Autonoma Metropolitana Xochimilco, Dept El Hombre & Ambiente, Calzada Hueso 1100, Mexico City 04960, DF, Mexico TI - Assessing spatial and temporal patchiness of the autotrophic ciliate Myrionecta rubra: a case study in a coastal lagoon AB - Myrionecta rubra patchiness in a Mexican coastal lagoon was studied. The 3 objectives were to (1) characterize the spatial distribution of M rubra patches through time; (2) characterize and model the spatial distribution of M rubra at scales ranging from m to km, and from 1 wk to more than 1 yr; and (3) to place the patchiness patterns of M rubra into an ecological context. Geostatistical analysis was applied to data collected from simple and nested sampling grids in different seasons; autocorrelation analysis was used to detect temporal regularities over 55 wk. Classical statistics were applied to data from 10 sites in the lagoon to identify trends relating ciliate abundance to environmental conditions. Patches were detected and characterized using empirical variograms and modelled by omnidirectional Gaussian and exponential functions. For most of the analysis variance was low in the nugget parameter, indicating a strong spatial resolution of the data, and the range parameter indicated that M. rubra formed patches of 10, 20, 80, 130, and 170 m. Spatial analysis using hierarchical grids produced a more detailed assessment of patches than single grids alone. Conditional simulation of patches indicated the presence of a > 2 km patch covering most of the western lagoon. Patch densities varied from between 4 and 700 cells ml(-1). M rubra abundance exhibited a temporal, pulse-like pattern; autocorrelation revealed a 13 wk periodicity. At the lagoonal level, multiple regression revealed a trend towards higher abundance in the north-west of the lagoon and a decrease during the dry season. Finally, we speculate on the forces causing heterogeneity at large (>1000 m), meso (100 to 1000 m), and fine (1 to 100 m) scales by examining physical-chemical environmental factors and physiological behavioural properties of the ciliate and its potential predators. We propose that M rubra patches originate by fragmentation of larger patches, growth of smaller patches, and physical-behavioural aggregation of cells MH - United Kingdom MH - Mexico|Distrito Federal PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000220739000005 L2 - geostatistics;conditional simulation;Mesodinium rubrum;Mexico;ordinary kriging;variographic analysis;MESODINIUM-RUBRUM; PHOTOTROPHIC CILIATE; PLANKTON PATCHINESS; PHYTOPLANKTON BIOMASS; ACARTIA-CLAUSI; PATCHES; SEA; HETEROGENEITY; ESTUARY; WATERS SO - Marine Ecology-Progress Series 2004 ;268():55-67 10304 UI - 4454 AU - Bullock SH AU - Turner RM AU - Hastings JR AU - Escoro-Rodriguez M AU - Lopez ZRA AU - Rodriguez-Navarro JL AD - Ctr Invest Cientifica & Educ Super Ensenada, Dept Biol Conservac, Ensenada 22800, Baja California, MexicoUS Geol Survey, Tucson, AZ 85719, USAUniv Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoUniv Autonoma Baja California, CICESE, Direcc Telemat, Ensenada, Baja California, MexicoBullock, SH, Ctr Invest Cientifica & Educ Super Ensenada, Dept Biol Conservac, Apartado Postal 2732, Ensenada 22800, Baja California, Mexico TI - Variance of size-age curves: Bootstrapping with autocorrelation AB - We modify a method of estimating size-age relations from a minimal set of individual increment data, recognizing that growth depends not only on size but also varies greatly among individuals and is consistent within an individual for several to many time intervals. The method is exemplified with data from a long-lived desert plant and a range of autocorrelation factors encompassing field-measured values. The results suggest that age estimates based on size and growth rates with only moderate autocorrelation are subject to large variation, which raises major problems for prediction or hindcasting for ecological analysis or management MH - Mexico|Baja California MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000223824300008 L2 - age-size relations;Fouquieria;growth;population structure;serial autocorrelation;simulation models;uncertainty estimation;GROWTH-RATES; RAIN-FOREST; MORTALITY PATTERNS; TREES; STANDS; OLD SO - Ecology 2004 ;85(8):2114-2117 10305 UI - 6419 AU - Burchard EG AU - Avila PC AU - Nazario S AU - Casal J AU - Torres A AU - Rodriguez-Santan JR AU - Toscano M AU - Sylvia JS AU - Alioto M AU - Salazar M AU - Gomez I AU - Fagan JK AU - Salas J AU - Lilly C AU - Matallana H AU - Ziv E AU - Castro R AU - Selman M AU - Chapela R AU - Sheppard D AU - Weiss ST AU - Ford JG AU - Boushey HA AU - Rodriguez-Cintron W AU - Drazen JM AU - Silverman EK AD - Univ Calif San Francisco, San Francisco, CA 94143, USASan Francisco Gen Hosp, Lung Biol Ctr, San Francisco, CA 94110, USAUniv Puerto Rico, Sch Med, San Juan Vet Affairs Med Ctr, San Juan, PR 00936, USAUniv Puerto Rico, Div Pediat Pulm, San Juan, PR 00936, USABrigham & Womens Hosp, Boston, MA 02115, USAColumbia Univ, New York, NY, USAHarlem Hosp Med Ctr, Harlem Lung Ctr, New York, NY, USAInst Nacl Enfermaedades Resp, Mexico City, DF, MexicoBurchard, EG, Univ Calif San Francisco, San Francisco, CA 94143, USA TI - Lower bronchodilator responsiveness in Puerto Rican than in Mexican subjects with asthma AB - In the United States, Puerto Ricans and Mexicans have the highest and lowest asthma prevalence, morbidity, and mortality, respectively. To determine whether ethnicity-specific differences in therapeutic response, clinical response, and/or genetic factors contribute to differences in asthma outcomes, we compared asthma-related clinical characteristics among 684 Mexican and Puerto Rican individuals with asthma recruited from San Francisco, New York City, Puerto Rico, and Mexico City. Puerto Ricans with asthma had reduced lung function, greater morbidity, and longer asthma duration than did Mexicans with asthma. Bronchodilator responsiveness, measured as percentage change from baseline FEV1, was significantly lower among Puerto Ricans with asthma than among Mexicans with asthma. Puerto Ricans with asthma had on average 7.3% (95% confidence interval [CI], 4.6 to 9.9; p < 0.001) lower bronchodilator reversibility in FEV1, higher risk of an emergency department visit in the previous year (odds ratio, 2.63; 95% Cl, 1.6 to 4.3; p < 0.001), and of previous hospitalization for asthma (odds ratio, 1.94; 95% CI, 1.2 to 3.2; p = 0.009) than Mexicans. Subgroup analysis corroborated that Puerto Ricans with asthma had more severe disease than did Mexicans on the basis of lung function measurements, responsiveness to beta(2)-adrenergic agonists, and health care use. We conclude that Puerto Ricans with asthma respond less to albuterol than do Mexicans with asthma. These findings underscore the need for additional research on racial/ethnic differences in asthma morbidity and response to therapy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 33 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000188417800015 L2 - asthma;bronchodilator;clinical characteristics;Mexicans and Puerto Ricans;FUNCTION REFERENCE VALUES; ETHNIC-DIFFERENCES; LUNG-FUNCTION; CHINESE CHILDREN; UNITED-STATES; HONG-KONG; HISPANICS; HEALTH; ADOLESCENTS; MORTALITY SO - American Journal of Respiratory and Critical Care Medicine 2004 ;169(3):386-392 10306 UI - 4959 AU - Burgess KS AU - Singfield J AU - Melendez V AU - Kevan PG AD - Univ Guelph, Dept Bot, Guelph, ON N1G 2W1, CanadaUniv Autonoma Yucatan, Dept Ecol, Itzimna, Merida, MexicoUniv Guelph, Dept Environm Biol, Guelph, ON N1G 2W1, CanadaBurgess, KS, Univ Guelph, Dept Bot, Guelph, ON N1G 2W1, Canada TI - Pollination biology of Aristolochia grandiflora (Aristolochiaceae) in Veracruz, Mexico AB - The flowers of Aristolochia grandiflora are sapromyiophilous trap blossoms that deceive their visitors with optical and olfactory promise of hidden protein-rich substrate. The most effective pollinators are large Diptera, mostly Calliphoridae, which become trapped in the protogynous flowers on the first day of anthesis. Although the flowers are protogynous and subsequently release pollen, a variety of floral changes occur that discourage further insect visitation after pollination and allow the pollinators to escape on the second day of anthesis. On the first day of anthesis the flowers' strong carrion odor and color gradients draw pollinators toward the receptive gynostemium deep within the flower. Constricting floral tubes with trichomes oriented toward the gynostemium aid in capturing and holding the insects. On the next day, the flowers change to male phase and pollen is deposited on the pollinator. Flower structure and function then change to release the pollen-dusted pollinator. To aid in pollinator release, the floral odor disappears, color cues change, hairs relax, and the constricting areas of the tube are opened. Pollination appears to be a two-day process for any given flower with floral senescence by the third day. Floral visitors do oviposit in the flowers, but we suggest that this is not relevant to pollination. Comparisons are made with other Aristolochiaceae MH - Canada MH - Mexico|Yucatan PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences U5 - J;Article AV - English IS - 0026-6493 UR - ISI:000222704400008 L2 - Aristolochia grandiflora;Aristolochiaceae;brood site provision;Calliphoridae;Diptera;insect interactions;Phoridae;pollination biology;protogyny;sapromyiophily;Staphylinidae;FLOWERS MIMICKING FUNGI; FLIES; PHORIDAE; DIPTERA; PANAMA SO - Annals of the Missouri Botanical Garden 2004 ;91(2):346-356 10307 UI - 6344 AU - Burgos R AU - Defeo O AD - CINVESTAV, IPN, Unidad Merida, Merida 97310, Yucatan, VenezuelaCRIP Yucalpeten, Progreso 97320, Yucatan, MexicoDefeo, O, CINVESTAV, IPN, Unidad Merida, AP 73 Cordemex, Merida 97310, Yucatan, Venezuela TI - Long-term population structure, mortality and modeling of a tropical multi-fleet fishery: the red grouper Epinephelus morio of the Campeche Bank, Gulf of Mexico AB - This paper develops a precautionary bioeconomic approach for the red grouper (Epinephelus morio) multi-fleet fishery in the Campeche Bank, Gulf of Mexico, based on a long-term analysis covering the years 1980-2000. Population structure was estimated through commercial sampling of the three fishing fleets participating in the fishery: two Mexican (one artisanal and the other industrial) and one Cuban (industrial). Length frequency distributions (LFDs) did not show significant differences between the Mexican industrial and the Cuban fleets, but differed from those of the artisanal fishery, which targets smaller individuals. The lack of differences in the LFDs between years suggests that the population structure was stable during the last two decades. However, the instantaneous coefficient of total mortality Z, estimated through length-converted catch curves, significantly increased during the 21-year period of analysis, being in average 1.22 times higher in 2000 than in 1980. Annual estimates of yield and Z, together with unit costs of effort and ex-vessel prices, were used as inputs to build a bioeconomic yield-mortality model. A sensitivity analysis was performed under three scenarios of natural mortality M (0.16, 0.25 and 0.35 per year). The yield at maximum economic yield (Y-MEY) and the associated mortality levels Z(MEY) and F-MEY were always the most conservative bioeconomic reference points (BRPs). The yield at maximum biological production (Y-MBP), Y-MEY and mortality-related BRPs were substantially lower than those based on maximum sustainable yield (MSY), thus constituting useful target BRPs for precautionary management. The bootstrap method used for determining the uncertainty associated at BRPs, shows that the best targets BRPs were Y-MEY and Y-MBP, whereas MSY is confirmed as a risky and limit BRP. A simple approach to the formulation of risk-averse management strategies was explored using the percentiles of cumulative distributions of MSY, Y-MBP and Y-MEY estimates generated from bootstrap against Z. We conclude that the red grouper fishery at Campeche Bank is overexploited and that immediate management actions are needed to prevent stock collapse. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Yucatan MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000188645100016 L2 - Epinephelus morio;yield-mortality models;risk;uncertainty;management SO - Fisheries Research 2004 ;66(2-3):325-335 10308 UI - 5777 AU - Burnett AB AU - Iturriaga MH AU - Escartin EF AU - Pettigrew CA AU - Beuchat LR AD - Univ Georgia, Ctr Food Safety, Griffin, GA 30223, USAUniv Georgia, Dept Food Sci & Technol, Griffin, GA 30223, USAProcter & Gamble Co, St Bernard, OH 45217, USAUniv Autonoma Queretaro, Fac Quim, Dept Invest & Postgrado Alimentos, Queretaro, MexicoBeuchat, LR, Univ Georgia, Ctr Food Safety, 1109 Expt St, Griffin, GA 30223 USA TI - Influence of variations in methodology on populations of Listeria monocytogenes recovered from lettuce treated with sanitizers AB - The elimination of Listeria monocytogenes inoculated onto a piece of cut iceberg lettuce (3.8 by 3.8 cm) by treatment with chlorinated water (200 mug/ral free chlorine) and a 0.5% (wt/vol) solution of FIT Professional Line Antibacterial Cleaner (FIT) was investigated. The efficacy of the two sanitizers was not influenced by the composition of the medium used to culture the L. monocytogenes used in the inocula, the number of strains in the inoculum, or the recovery medium used to enumerate the pathogen on lettuce after treatment. Drying inoculum on lettuce for 45 min at 37degreesC caused more cells to die or not be retrieved compared with drying inoculum for 30 min at 25degreesC. However, the percentage of cells in the inoculum recovered from lettuce treated with chlorine or FIT was not significantly different, regardless of the drying method. Stomaching, homogenizing, or stomaching followed by homogenizing lettuce treated with sanitizers resulted in recovery of similar numbers of L. monocytogenes, indicating that stomaching and homogenizing are equivalent in extracting cells; the sequential use of both processing methods did not substantially increase the efficiency of recovery. Washing lettuce with water or treating lettuce with 200 mug/ml chlorine or FIT resulted in decreases in populations of 0.60, 1.76, and 1.51 log CFU per lettuce piece, respectively, regardless of variations in test parameters. Reductions caused by sanitizers were significantly greater (alpha = 0.05) than that observed for water but not significantly different from each other. It is concluded that evaluation of sanitizers for their efficacy in killing L. monocytogenes on lettuce can be determined by spot inoculating 50 mul of a five-strain mixture of cells from 24-h cultures suspended in 5% horse serum albumen, followed by drying the inoculum for 45 min at 37degreesC, treatment by submerging in 50 ml of sanitizer for 5 min, stomaching samples in 50 ml of Dey-Engley neutralizing broth for 2 min, and enumerating survivors on modified Oxford medium MH - USA MH - Mexico|Queretaro PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000220705800016 L2 - ESCHERICHIA-COLI O157-H7; PROPOSED STANDARD METHOD; CHLORINATED WATER; RAW FRUITS; ICEBERG LETTUCE; SALMONELLA; VEGETABLES; EFFICACY; GROWTH; TOMATOES SO - Journal of Food Protection 2004 ;67(4):742-750 10309 UI - 4583 AU - Bustamante VH AU - Martinez-Flores I AU - Vlamakis HC AU - Zusman DR AD - Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62251, Morelos, MexicoZusman, DR, Univ Calif Berkeley, Dept Mol & Cell Biol, 229 Stanley Hall, Berkeley, CA 94720 USA TI - Analysis of the Frz signal transduction system of Myxococcus xanthus shows the importance of the conserved C-terminal region of the cytoplasmic chemoreceptor FrzCD in sensing signals AB - The Frz chemosensory system controls directed motility in Myxococcus xanthus by regulating cellular reversal frequency. M. xanthus requires the Frz system for vegetative swarming on rich media and for cellular aggregation during fruiting body formation on starvation media. The Frz signal transduction pathway is formed by proteins that share homology with chemotaxis proteins from enteric bacteria, which are encoded in the frzA-F putative operon and the divergently transcribed frzZ gene. FrzCD, the Frz system chemoreceptor, contains a conserved C-terminal module present in methyl-accepting chemotaxis proteins (MCPs); but, in contrast to most MCPs, FrzCD is localized in the cytoplasm and the N-terminal region of FrzCD does not contain transmembrane or sensing domains, or even a linker region. Previous work on the Frz system was limited by the unavailability of deletion strains. To understand better how the Frz system functions, we generated a series of in-frame deletions in each of the frz genes as well as regions encoding the N-terminal portion of FrzCD. Analysis of mutants containing these deletions showed that FrzCD (MCP), FrzA (CheW) and FrzE (CheA-CheY) control vegetative swarming, responses to repellents and directed movement during development, thus constituting the core components of the Frz pathway. FrzB (CheW), FrzF (CheR), FrzG (CheB) and FrzZ (CheY-CheY) are required for some but not all responses. Furthermore, deletion of approximate to 25 amino acids from either end of the conserved C-terminal region of FrzCD results in a constitutive signalling state of FrzCD, which induces hyper-reversals with no net cell movement. Surprisingly, deletion of the N-terminal region of FrzCD shows only minor defects in swarming. Thus, signal input to the Frz system must be sensed by the conserved C-terminal module of FrzCD and not the usual N-terminal region. These results indicate an alternative mechanism for signal sensing with this cytoplasmic MCP MH - USA MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000223495100017 L2 - PROTEIN-PROTEIN INTERACTIONS; METHYL-ACCEPTING SITES; RHODOBACTER-SPHAEROIDES; GLIDING MOTILITY; SOCIAL MOTILITY; BACTERIAL CHEMOTAXIS; BACILLUS-SUBTILIS; RESPONSE REGULATOR; FRIZZY GENES; IV PILUS SO - Molecular Microbiology 2004 ;53(5):1501-1513 10310 UI - 5627 AU - Bustos ME AU - Enkerlin W AU - Reyes J AU - Toledo J AD - Inst Nacl Invest Nucl, Gerencia Invest Aplicada, Mexico City 11801, DF, MexicoIAEA, Vienna, AustriaCampana Nacl Contra Moscas Fruta, Chiapas 30700, MexicoEl Colegio Frontera Sur, Dept Entomol Trop, Chiapas 30700, MexicoBustos, ME, Inst Nacl Invest Nucl, Gerencia Invest Aplicada, Apartado Postal 18-1027, Mexico City 11801, DF, Mexico TI - Irradiation of mangoes as a postharvest quarantine treatment for fruit flies (Diptera : Tephritidae) AB - Mangoes infested with third instar larvae were irradiated using Co-60 gamma rays and a dose interval of 2-250 Gy to assess the irradiation dose required to prevent adult emergence of the Mexican fruit fly (Anastrepha ludens), the West Indies fruit fly (A. obliqua), the sapote fruit fly (A. serpentina), and the Mediterranean fruit fly (Ceratitis capilata). Doses of 76.9, 87.3, 91.4 and 112.7 Gy, were estimated to inhibit 99.9968% (probit 9) of adult emergence for A. obliqua, A. serpentina, A. ludens, and C. capitata, respectively. Using mangoes infested with a total of 100,000 larvae of each species, the results obtained in the laboratory were confirmed using a dose of 100 Gy for the Anastrepha species and 150 Gy for C. capitata. No adult emergence was observed for any of the four species compared with approximate to80% emergence in the controls. A dose of 150 Gy is recommended as a generic quarantine treatment against potential infestation of these species in exported mangoes. A minor decrease in the ascorbic acid content was the only adverse effects observed in irradiated mangoes MH - Austria MH - Mexico|Chiapas MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000221038400017 L2 - irradiation;quarantine treatment;fruit flies;Anastrepha spp.;C. capitata;GAMMA-RADIATION; FLY DIPTERA; ANASTREPHA; MEXICAN; DEVICE SO - Journal of Economic Entomology 2004 ;97(2):286-292 10311 UI - 3603 AU - Caballero-Lopez RA AU - Moraal H AU - McCracken KG AU - McDonald FB AD - Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742, USANorthwest Univ, Sch Phys, Unit Space Phys, ZA-2520 Potchefstroom, South AfricaUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCaballero-Lopez, RA, Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA TI - The heliospheric magnetic field from 850 to 2000 AD inferred from Be-10 records AB - Be-10 found in ice cores is an indicator of cosmic ray intensity in the past. We use this isotope to study cosmic ray transport and the heliospheric magnetic field before the advent of instrumental cosmic-ray measurements in the modern space era. The galactic cosmic ray intensity is governed by scattering, convection, and drift of the charged particles in the heliospheric magnetic field, which leads to a modulation in their intensity. We model these cosmic ray intensity changes observed at Earth during the space era with solutions of the cosmic ray transport equation. This gives a set of diffusion mean free paths during the past few solar activity cycles. A relationship is then determined between these diffusion mean free paths and satellite observations of the heliospheric magnetic field during the same period, yielding a relationship between the observed cosmic ray intensity and the heliospheric magnetic field. We then calculate the diffusion mean free paths that explain the variations in the Be-10 concentration during the last millennium and use the space-era calibration to infer heliospheric magnetic field since 850 AD. It is shown how this inversion of the Be-10 data depends on the strength of the heliospheric magnetic field and variations in its turbulence, both of which are quite uncertain. Nevertheless, the results show that for a wide range of parameters, there was a significant heliospheric magnetic field with a strength of 2 to 5 nT at Earth during the so-called Grand Minima of solar activity. It is also shown that the strength of this field has attained six maxima in the past 1150 years, all approximating the present-day field strength, and we speculate that a limiting mechanism may be in operation. On several occasions the strength of the field has switched rapidly from approximate to2 nT to approximate to6 nT within 40 years. During the Grand Minima the total field derived from the Be-10 data differs significantly from the open solar magnetic field calculated from the models of Solanki et al. [2002] and Schrijver et al. [2002] MH - USA MH - Mexico|Distrito Federal MH - South Africa PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000225880700008 L2 - heliospheric magnetic field;cosmic ray modulation;cosmogenic nuclei;COSMIC-RAY MODULATION; SOLAR MODULATION; PERPENDICULAR DIFFUSION; CHARGED-PARTICLES; MAUNDER MINIMUM; POLAR ICE; SUN; TRANSPORT; DRIFT; WIND SO - Journal of Geophysical Research-Space Physics 2004 ;109(A12): 10312 UI - 4764 AU - Caballero AE AU - Delgado A AU - guilar-Salinas CA AU - Herrera AN AU - Castillo JL AU - Cabrera T AU - Gomez-Perez FJ AU - Rull JA AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab, Mexico City 14000, DF, MexicoHarvard Univ, Sch Med, Joslin Diabet Ctr, Clin Res Ctr, Boston, MA 02215, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Radiol, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Med, Mexico City 14000, DF, MexicoAguilar-Salinas, CA, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - The differential effects of metformin on markers of endothelial activation and inflammation in subjects with impaired glucose tolerance: A placebo-controlled, randomized clinical trial AB - The effect of metformin ( 1000 mg twice a day) on markers of endothelial activation, inflammation, and coagulation was investigated in subjects with impaired glucose tolerance (IGT) in a 16-wk, randomized, placebo-controlled, double-blind study. Soluble intercellular adhesion molecule, soluble vascular cell adhesion molecule, C-reactive protein, TNFalpha, von Willebrand factor, and tissue plasminogen activator were measured at baseline and at the end of the trial. Subjects with IGT ( n = 55, 14 males and 41 females), aged 48.4 +/- 9.6 yr with a body mass index of 31.4 +/- 5.6 kg/m(2), were studied. All participants followed a 1-month stabilization period in their diet and physical activity. Afterward, 29 subjects were assigned to the treatment group and 26 to the control group. A significant reduction in weight, fasting plasma glucose, soluble intercellular adhesion molecule ( 306 +/- 75 vs. 268 +/- 61 ng/ml, P = 0.029), soluble vascular cell adhesion molecule ( 595 +/- 114 vs. 508 +/- 126 ng/ml, P = 0.006), and von Willebrand factor ( 124 +/- 34 vs. 94 +/- 34%, P = 0.001) was seen in the treatment group, whereas tissue plasminogen activator, TNFalpha, and C-reactive protein levels did not change. No change was seen in the control group. Thus, metformin improves the plasma levels of some markers of endothelial activation and coagulation in subjects with IGT, whereas it has no effect on markers of inflammation MH - Mexico|Distrito Federal MH - USA PB - CHEVY CHASE: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 17 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0021-972X UR - ISI:000223072400053 L2 - C-REACTIVE PROTEIN; CARDIOVASCULAR RISK-FACTORS; VON-WILLEBRAND-FACTOR; INSULIN-RESISTANCE; DIABETES-MELLITUS; ADHESION MOLECULE-1; METABOLIC SYNDROME; OBESE-PATIENTS; HEART-DISEASE; TNF-ALPHA SO - Journal of Clinical Endocrinology and Metabolism 2004 ;89(8):3943-3948 10313 UI - 4422 AU - Caballero I AU - Vazquez JM AU - Centurion F AU - Rodriguez-Martinez H AU - Parrilla I AU - Roca J AU - Cuello C AU - Martinez EA AD - Univ Murcia, Fac Vet Med, Dept Med & Surg Anim Reprod, Murcia, SpainUniv Yucatan, Fac Vet, Dept Anim Reprod, Merida, MexicoSwedish Univ Agr Sci SLU, Fac Vet Med & Anim Sci, Dept Obstet & Gynaecol, Uppsala, SwedenVazquez, JM, Univ Murcia, Fac Vet, Dept Med & Cirugia Anim, E-30071 Murcia, Spain TI - Comparative effects of autologous and homologous seminal plasma on the viability of largely extended boar spermatozoa AB - Sperm handling, associated to artificial reproduction technologies (ART) such as in vitro fertilization (IVF) or the use of flow cytometry for cell analysis or sorting imposes volumetric extension of the sperm suspension and decreases sperm viability, presumably because of the removal of seminal plasma (SP) components. This study evaluated whether a 10% v/v of autologous SP (retrieved from the same donor boar) or homologous SP (e.g. from any of the four fertile boars included, other than the one providing the spermatozoa) would differently affect the viability of boar spermatozoa subjected to large extension in a simple saline medium [phosphate-buffered saline and 0.1% ethylenediaminetetraacetic acid (EDTA), PBSm] to a concentration of 0.3 x 10(6) spermatozoa/ml and incubated for 2 h at 30degreesC. Sperm viability was monitored as membrane integrity [using the fluorophore carboxyfluorescein diacetate (C-FDA) and propidium iodide (PI)], mitochondrial function (using the fluorophore R-123) and motility characteristics [using Computer Assisted Sperm Analysis (CASA)]. Substraction of the SP and extension followed by incubation in PBSm significantly (p < 0.05) decreased sperm viability, which could be restored by addition of autologous SP. Furthermore, exposure of the extended spermatozoa to homologous SP (from any other individual boar) significantly (p < 0.05) varied with the source of the sire; some boars exerting beneficial effects (even surpassing the effects of the autologous SP; p < 0.05) while at least one boar negatively (p < 0.05) influencing the viability of the incubated spermatozoa. It is concluded that SP should be present when incubating highly extended spermatozoa. As a result of the obvious differences among boars, it would be advantageous to examine the ability of SP to maintain sperm viability prior to the use of SP pools during sperm handling in vitro MH - Mexico|Yucatan MH - Spain MH - Sweden PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0936-6768 UR - ISI:000223863200014 L2 - FREE BOVINE OOCYTES; MEMBRANE INTEGRITY; BULL SPERMATOZOA; HIGH DILUTION; FERTILIZING-CAPACITY; SPERM; MOTILITY; PENETRATION; PROTEINS; RAM SO - Reproduction in Domestic Animals 2004 ;39(5):370-375 10314 UI - 4921 AU - Cabane M AU - Coll P AU - Szopa C AU - Israel G AU - Raulin F AU - Sternberg R AU - Mahaffy P AU - Person A AU - Rodier C AU - Navarro-Gonzalez R AU - Niemann H AU - Harpold D AU - Brinckerhoff W AD - Univ Paris 06, CNRS, SA IPSL, Serv Aeron, F-75005 Paris, FranceUniv Paris 12, LISA, F-94010 Creteil, FranceNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Paris 06, Lab Geol Sedimentaire, F-75005 Paris, FranceUniv Poitiers, Lab Synth & Reactivites Chim, F-86000 Poitiers, FranceUNAM, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoJohns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723, USACabane, M, Univ Paris 06, CNRS, SA IPSL, Serv Aeron, T45-B102,4 Pl Jussieu, F-75005 Paris, France TI - Did life exist on Mars? Search for organic and inorganic signatures, one of the goals for "SAM" (sample analysis at Mars) AB - Observation of Mars shows signs of a past Earth-like climate, and, in that case, there is no objection to the possible development of life, in the underground or at the surface, as in the terrestrial primitive biosphere. Sample analysis at Mars (SAM) is an experiment which may be proposed for atmospheric, ground and underground in situ measurements. One of its goals is to bring direct or indirect information on the possibility for life to have developed on Mars, and to detect traces of past or present biological activity. With this aim, it focuses on the detection of organic molecules: volatile organics are extracted from the sample by simple heating, whereas refractory molecules are made analyzable (i.e. volatile), using derivatization technique or fragmentation by pyrolysis. Gaseous mixtures thus obtained are analyzed by gas chromatography associated to mass spectrometry. Beyond organics, carbonates and other salts are associated to the dense and moist atmosphere necessary to the development of life, and might have formed and accumulated in some places on Mars. They represent another target for SAM. Heating of the samples allows the analysis of structural gases of these minerals (CO2 from carbonates, etc.), enabling to identify them. We also show, in this paper, that it may be possible to discriminate between abiotic minerals, and minerals (shells, etc.) created by living organisms. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal MH - USA PB - KIDLINGTON: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000222530600021 L2 - Mars;astrobiology;organic matter;derivatisation;pyrolysis;gas chromatography;IN-SITU; GAS-CHROMATOGRAPHY; ACP EXPERIMENT; SPACE; CARBONATES; HUYGENS; SURFACE; SOIL SO - Mercury, Mars and Saturn 2004 ;33(12):2240-2245 10315 UI - 2267 AU - Cabello R AU - Lucero P AU - Romeu J AU - Marquez JP AU - Disis ML AU - Salazar LG AD - Ctr Int Invest Detecc & Prevenc Canc, Sonora, MexicoUniv Calif Davis, Davis, CA 95616, USAUniv Washington, Seattle, WA 98195, USA TI - Trends of breast cancer incidence in Ciudad Obregon, Sonora, Mexico MH - Mexico|Sonora MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 0167-6806 UR - ISI:000225589600263 SO - Breast Cancer Research and Treatment 2004 ;88():S92-S93 10316 UI - 3969 AU - Caddy JF AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Merida 97300, Yucatan, MexicoCaddy, JF, Via Cervialto 3, I-04011 Latina, Italy TI - Current usage of fisheries indicators and reference points, and their potential application to management of fisheries for marine invertebrates AB - The use of indicators in management of invertebrate resources is placed in the context provided by more extensive applications in finfish fisheries. Indicators proposed for the Convention on International Trade in Endangered Species based on extent-of-decline and trend analysis are appropriate should full assessments be unavailable. Measuring reproductive performance frequently builds on egg-per-recruit considerations, given that age structure and stock-recruit relationships are rarely available. Reference points derived from models are compared with direct use of data series, and a broad-brush approach providing a redundancy of indicators is recommended. Indicators may measure productivity as well as biomass and exploitation rate, but ecosystem, spatial, habitat, environmental characteristics, and socio economic considerations also require monitoring. There is a need to integrate multiple indicators and limit reference points into harvest rules and other decisional infrastructures. The various driving force - pressure - state - impact - response classifications of indicators in use for environmental assessment are now being proposed for marine resources and offer one context for combining multiple indicators. Another is provided by the traffic light approach already used for invertebrate fisheries. The use of indicators and reference points in stock rebuilding is described MH - Italy MH - Mexico|Yucatan PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 10 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0706-652X UR - ISI:000224976800002 L2 - BIOLOGICAL REFERENCE POINTS; LOBSTER HOMARUS-AMERICANUS; NATURAL MORTALITY; SEMIENCLOSED SEAS; SPINY LOBSTER; NEW-ZEALAND; RECRUITMENT; STOCK; HABITAT; NURSERY SO - Canadian Journal of Fisheries and Aquatic Sciences 2004 ;61(8):1307-1324 10317 UI - 5090 AU - Cadez A AU - Carraminana A AU - Vidrih S AD - Univ Ljubljana, Fac Math & Phys, Dept Phys, SI-1000 Ljubljana, SloveniaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoCadez, A, Univ Ljubljana, Fac Math & Phys, Dept Phys, Jadranska 19, SI-1000 Ljubljana, Slovenia TI - Spectroscopy and three-dimensional imaging of the crab nebula AB - Spectroscopy of the Crab Nebula along different slit directions reveals the three-dimensional structure of the optical nebula. On the basis of the linear radial expansion result first discovered by V. Trimble in 1968, we make a three-dimensional model of the optical emission. Results from a limited number of slit directions suggest that optical lines originate from a complicated array of wisps that are located in a rather thin shell pierced by a jet. The jet is certainly not prominent in optical emission lines, but the direction of the piercing is consistent with the direction of the X-ray and radio jet. The shell's effective radius is approximate to79", its thickness is about a third of the radius, and it is moving out with an average velocity of 1160 km s(-1) MH - Mexico|Puebla MH - Slovenia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000222456200026 L2 - ISM : individual (Crab Nebula);ISM : kinematics and dynamics;supernova remnants;techniques : spectroscopic;PROPER MOTION; PULSAR; FILAMENTS; WFPC2; RADIO; DISCOVERY; SPECTRUM; EMISSION; HST SO - Astrophysical Journal 2004 ;609(2):797-809 10318 UI - 4837 AU - Cahn P AU - Vibhagool A AU - Schechter M AU - Soto-Ramirez L AU - Carosi G AU - Smaill F AU - Jordan JC AU - Pharo CE AU - Thomas NE AU - Steele HM AD - GlaxoSmithKline, Global Hlth Outcomes, Res Triangle Pk, NC 27709, USAGlaxoSmithKline Res & Dev, Biomed Data Sci, Greenford, Middx, EnglandGlaxo Wellcome Res & Dev, HIV & Opportunist Infect Grp, Greenford, Middx, EnglandMcMaster Univ, Med Ctr, Hamilton, ON, CanadaUniv Brescia, Ist Malattie Infett & Trop, Brescia, ItalyInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoHosp Univ Clementino Fraga Filho, Rio De Janeiro, BrazilMahidol Univ, Ramathibodi Hosp, Bangkok 10700, ThailandFdn HUESPED, Buenos Aires, DF, ArgentinaJordan, JC, GlaxoSmithKline, Global Hlth Outcomes, Sander 17-2124, Res Triangle Pk, NC 27709 USA TI - Predictors of adherence and virologic outcome in HIV-infected patients treated with abacavir- or indinavir-based triple combination HAART also containing lamivudine/zidovudine AB - Objectives: To compare dosing convenience and adherence with abacavir (ABC) 300 mg plus a fixed-dose lamivudine 150 mg/zidovudine 300 mg combination tablet (COM) twice daily versus indinavir (IDV) plus COM twice daily in treatment-naive, HIV-1-infected adults; and to evaluate the association among difficulty taking antiretroviral regimens, adherence, and virologic efficacy. Methods:An open-label, randomized, multicenter, international study compared the COM/ABC and IDV/COM regimens with respect to self-reported adherence and regimen convenience over 48 weeks. Logistic regression analysis (LRA) was done on a patient sub-sample from both groups to evaluate predictors of adherence and virologic response at last time-point on randomized therapy (LTORT). Results: The study population was diverse with respect to ethnicity (38% Asian, 27% Hispanic, 28% white, 3% black, 4% other) and gender (39% women, 61% men). Baseline median HIV-1 RNA was 4.80 log(10) copies/mL and CD4+ cell count was 315 cells/mm(3). Of 329 patients who were randomized and received treatment, 315 (96%) provided adherence data. Significantly more patients in the ABC/COM group than in the IDV/COM group reported greater than or equal to 95% adherence to therapy (76 vs 58%, p < 0.001) and no difficulty in taking their regimen (91 vs 61 %, p < 0.001). In both groups, the highest probability of HIV-1 RNA < 400 copies/mL occurred when median adherence was ! 95%. The probability of HIV-1 RNA < 400copies/mL declined more rapidly in the IDV/COM group as adherence rates decreased. LRA showed that no difficulty taking any of the drugs in the regimen, ABC/COM treatment group, and male gender were independent significant predictors of greater than or equal to 95% adherence (p < 0.05). Median adherence and baseline HIV-1 RNA were significant predictors of HIV-1 RNA < 400 copies/mL (p < 0.05). Conclusions: Patients reported greater ease of use and superior adherence to ABC/COM than IDV/COM. Patient-re ported difficulty taking drugs in a regimen was predictive of reduced adherence, and both of the latter factors were predictive of poorer virologic outcome. Adherence levels of greater than or equal to 95% in both treatment groups maximized the probability of patients achieving an HIV-1 RNA < 400 copies/mL MH - Argentina MH - Brazil MH - Canada MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal MH - USA MH - Thailand PB - NEWBURY: LIBRAPHARM RP - NOT IN FILE U3 - TC 7 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0300-7995 UR - ISI:000222919800017 L2 - abacavir;adherence;combination antiretroviral therapy;combination tablet;indinavir;lamivudine/zidovudine;ACTIVE ANTIRETROVIRAL THERAPY; SELF-REPORTED ADHERENCE; BARRIERS; REGIMENS; ADULTS SO - Current Medical Research and Opinion 2004 ;20(7):1115-1123 10319 UI - 6439 AU - Cahturvedi S AD - Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, IndiaCINVESTAV, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoCahturvedi, S, Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, India TI - Is the quark-mixing matrix moduli symmetric? AB - If the unitary quark-mixing matrix, V, is moduli symmetric, it will depend on three real parameters. This means that there is a relation between the four parameters needed to parametrize a general V. It is shown that there exists a very simple relation involving \V-11\(2), \V-33\(2), (ρ) over bar and (η) over bar. This relation is compared with the present experimental data. It is concluded that a moduli symmetric V is not ruled out MH - India MH - Mexico|Yucatan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000188214400008 L2 - quark mixing matrix;CKM matrix;KOBAYASHI-MASKAWA MATRIX; CP-VIOLATION; PARAMETRIZATION; ANGLES; MODEL SO - Modern Physics Letters A 2004 ;19(2):159-163 10320 UI - 2662 AU - Cahuana L AU - Sosa S AU - Bertozzi S AD - Natl Publ Hlth Inst, Cuernavaca, Morelos, MexicoUniv York, York YO10 5DD, N Yorkshire, England TI - Improving the delivery of child and maternal health care in a poor setting: Costs and barriers to be considered in the implementation of who mother-baby package in Morelos, Mexico MH - United Kingdom MH - Mexico|Morelos PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Meeting Abstract AV - English IS - 1098-3015 UR - ISI:000225020700470 SO - Value in Health 2004 ;7(6):785-786 10321 UI - 3414 AU - Calderon-Garciduenas L AU - Reed W AU - Maronpot RR AU - Henriquez-Roldan C AU - gado-Chavez R AU - Calderon-Garciduenas A AU - Dragustinovis I AU - Franco-Lira M AU - ragon-Flores M AU - Solt AC AU - Altenburg M AU - Torres-Jordon R AU - Swenberg JA AD - Univ N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27599, USAInst Nacl Pediat, Mexico City 14410, DF, MexicoUniv N Carolina, Dept Pediat, Chapel Hill, NC 27599, USAUniv N Carolina, Ctr Environm Med Asthma & Lung Biol, Chapel Hill, NC 27599, USANIEHS, Res Triangle Pk, NC 27709, USAUniv Valparaiso, Dept Estadist, Valparaiso, ChileInst Nacl Cancerol, Dept Pathol, Mexico City, DF, MexicoHosp Especialidades No 25, IMSS, Monterrey, NL, MexicoIMSS, Ctr Invest Biomed Noreste CIBIN, Monterrey, NL, MexicoUniv Ejercito & Fuerza Aerea, Escuela Med Mil, Mexico City, DF, MexicoCent Mil Hosp, Dept Patol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, NUCE, Fac Med, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27599, USASwenberg, JA, Univ N Carolina, Dept Environm Sci & Engn, CB 7431,253C Rosenau Hall, Chapel Hill, NC 27599 USA TI - Brain inflammation and Alzheimer's-like pathology in individuals exposed to severe air pollution AB - Air pollution is a complex mixture of gases (e.g., ozone), particulate matter, and organic compounds present in outdoor and indoor air. Dogs exposed to severe air pollution exhibit chronic inflammation and acceleration of Alzheimer's-like pathology, suggesting that the brain is adversely affected by pollutants. We investigated whether residency in cities with high levels of air pollution is associated with human brain inflammation. Expression of cyclooxygenase-2 (COX2), an inflammatory mediator, and accumulation of the 42-amino acid form of beta-amyloid (Abeta42), a cause of neuronal dysfunction, were measured in autopsy brain tissues of cognitively and neurologically intact lifelong residents of cities having low (n:9) or high (n:10) levels of air pollution. Genomic DNA apurinic/apyrimidinic sites, nuclear factor-kappaB activation and apolipoprotein E genotype were also evaluated. Residents of cities with severe air pollution had significantly higher COX2 expression in frontal cortex and hippocampus and greater neuronal and astrocytic accumulation of Abeta42 compared to residents in low air pollution cities. Increased COX2 expression and Abeta42 accumulation were also observed in the olfactory bulb. These findings suggest that exposure to severe air pollution is associated with brain inflammation and Abeta42 accumulation, two causes of neuronal dysfunction that precede the appearance of neuritic plaques and neurofibrillary tangles, hallmarks of Alzheimer's disease MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 15 U4 - Pathology;Toxicology U5 - J;Article AV - English IS - 0192-6233 UR - ISI:000226293500004 L2 - brain;beta-amyloid;cyclooxygenase 2;inflammation;neuropathology;air pollution;Mexico City;NEURONAL CYCLOOXYGENASE-2 EXPRESSION; INHALED ULTRAFINE PARTICLES; AMYLOID PRECURSOR PROTEIN; NF-KAPPA-B; BETA-PEPTIDE; RAT-BRAIN; DISEASE; ACCUMULATION; PLASTICITY; INDUCTION SO - Toxicologic Pathology 2004 ;32(6):650-658 10322 UI - 6087 AU - Calderon-Segura ME AU - Gomez-Arroyo S AU - Villalobos-Pietrini R AU - Butterworth FA AU - mador-Munoz O AD - Natl Autonomous Univ Mexico, Ctr Ciencias Atomsfera, Lab Citogenet Ambiental, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Ctr Ciencias Atomsfera, Lab Mutagenesis Ambiental, Mexico City 04510, DF, MexicoInst River Res Int, Sylmar, CA, USAGomez-Arroyo, S, Natl Autonomous Univ Mexico, Ctr Ciencias Atomsfera, Lab Citogenet Ambiental, Ciudad Univ, Mexico City 04510, DF, Mexico TI - The effects of seasonal weather on the genotoxicity, cytokinetic properties, cytotoxicity and organochemical content of extracts of airborne particulates in Mexico City AB - Extracted organic material (EOM) from PM10 airborne particles collected during three distinct seasons in Mexico City was assayed for genotoxicity, cytokinetic effects and cytotoxicity. Using sister chromatid exchange (SCE) for genotoxicity, replication index (RI) and mitotic index (MI) for cytokinetics, and microscopic evaluation (cell death) for cytotoxicity on human lymphocytes exposed to increasing concentrations of EOM, this study showed that the extent of genotoxic, cytokinetic, and cytotoxic change caused by pollutants depended at least in part on the seasonal weather. Bioactivated extracts of samplings in April (warm and dry), August (warm and rainy) and November (cool and dry) produced the highest rate of genotoxicity (SCE) in November and the lowest rate in April. Without bioactivation the rates were still highest in November but equally low in April and August. Thus, almost all of the genotoxic responses in the bioactivation experiments during these latter months were from promutagens. However, in November equally large amounts of mutagens and promutagens were present. Cytokinetics (RI and MI) showed steady decreases as the concentration of EOM was increased, independent of bioactivation and weather. Cytotoxicity (cell death) occurred when higher concentrations of EOM were used. EOM was the least cytotoxic in April and most cytotoxic in November. Bioactivation was not required for cytokinetic change and cytotoxicity, suggesting that the agents involved may be different from the genotoxic agents. Using gas chromatography/mass spectroscopy (GC/MS) it could be shown that the type of pollutant chemicals in the EOM also depended on the weather. In particular, all 15 polycyclic aromatic hydrocarbons (PAH) studied were present in November EOM whereas four different PAH were absent in the other 2 months. Generally the amounts were less in the EOM collected in April and August. Conversely, nitro-PAH compounds were greater in number in April EOM but higher in amount in November EOM. The significance of these findings is discussed. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 1383-5718 UR - ISI:000220006800002 L2 - airborne particulate matter;extractable organic material;PM10;polycyclic aromatic hydrocarbons;nitro-polycyclic aromatic hydrocarbons;replication index;mitotic index;cell death;human lymphocytes;POLYCYCLIC AROMATIC-HYDROCARBONS; URBAN AIR PARTICULATE; NEW-YORK-CITY; SAO-PAULO; ORGANIC MATERIAL; HUMAN-LYMPHOCYTES; HEALTH BENEFITS; RURAL AREA; MUTAGENICITY; MATTER SO - Mutation Research-Genetic Toxicology and Environmental Mutagenesis 2004 ;558(1-2):7-17 10323 UI - 4880 AU - Calderon F AU - Marroquin JL AU - Botello S AU - Vemuri BC AD - Univ Michoacana San Nicolas Hidalgo, Morelia 58000, Michoacan, MexicoCtr Invest Matemat, Guanajuato 36000, Gto, MexicoDept Comp Sci, Gainesville, FL 32611, USACalderon, F, Univ Michoacana San Nicolas Hidalgo, Santiago Tapia 403 Ctr, Morelia 58000, Michoacan, Mexico TI - The MPM-MAP algorithm for motion segmentation AB - We present an MPM-MAP application for the efficient estimation of piecewise parametric models for motion segmentation. This algorithm permits the simultaneous estimation of. the number of models, the parameters for each model and the regions where each model is applicable. It is based on Bayesian estimation theory, and is theoretically justified by the use of a specific cost function whose expected value decreases at every iteration and by a new model for the posterior marginal distributions which is amenable to the use of fast computational methods. We compare the performance of this method with the most similar segmentation algorithm. the well known Expectation-Maximization algorithm. We present a comparison of the performance of both algorithms using synthetic and real image sequences. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1077-3142 UR - ISI:000222841800003 L2 - MAXIMUM-LIKELIHOOD; OPTICAL-FLOW; IMAGES; VISION; MODELS; LAYERS SO - Computer Vision and Image Understanding 2004 ;95(2):165-183 10324 UI - 5497 AU - Calderon G AU - Gerard JM AU - Pestieau J AU - Weyers J AD - Inst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Catholique Louvain, Inst Phys Theor, B-1348 Louvain, BelgiumCalderon, G, Inst Politecn Nacl, CINVESTAV, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Relating final state interactions in B -> D pi and B -> DK AB - A Regge model calculation relates the strong phase in B --> DK to that in B --> Dpi. This provides a significant test of a hadromic picture of final state interactions in B decays. (C) 2004 Elsevier B.V. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000221485200011 L2 - ISOSPIN AMPLITUDES; B DECAYS; PHASES; PI SO - Physics Letters B 2004 ;588(1-2):81-84 10325 UI - 6180 AU - Calderon ML AU - De Perez GR AU - Pinilla MPR AD - Univ Ind Santander, Escuela Biol, Lab Biol Reprod Vertebrados, Bucaramanga, ColombiaUniv Nacl Colombia, Fac Ciencias, Ctr Microscopia, Bogota, ColombiaPinilla, MPR, Univ Nacl Autonoma Mexico, Inst Biol, Lab Herpetol, Mexico City 04510, DF, Mexico TI - Morphology of the ovary of Caiman crocodilus (Crocodylia : Alligatoridae) AB - We describe the ovarian histology and characterize the folliculogenesis of adult females of Caiman crocodilus in order to compare them with other species of Reptilia. The gonad has a thin irregular cortex and a well-developed reticular stroma, composed of vascularized chordae, drained by large lymphatic vessels and separated by extensive lacunae. Simple cuboidal to squamous epithelium, dense connective tissue with numerous elastin fibers, and smooth muscle constitute the ovarian wall. This morphology is similar to that of other Crocodylia, Aves and Testudines. Germinal nests are distributed in the ovarian cortex, some of them with oogonia. Oocytes leave the germinal nests with a single layered cuboidal granulosa, remaining simple during vitellogenesis, as in other Archosauria and Testudines and different from Squamata. As the oocyte grows, the theca is formed by numerous fibroblasts, collagen fibers, and smooth muscle fibers, becoming very thick, highly vascularized and developing muscle bands at advanced vitellogenesis. Folliculogenesis shares morphological features with other species of Rep ilia. The corpus luteum is similar to that described for Archosauria; h during luteolysis, the theca shrinks and the amount of luteinic cells decreases. The relationship of the corpus luteum to vitellogenesis and egg maintenance is unclear in Crocodylia. Follicular regression in Caiman crocodilus corresponds to an invasive atresia type. Histological features seen in the ovary of Caiman crocodilus are similar to those described in Alligator mississippiensis indicating that these features could be shared among Crocodylia. Also several of these morphological characteristics are observed in Aves suggesting a similar reproductive functional morphology in Archosauria MH - Colombia MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Anatomy & Morphology U5 - J;Article AV - English IS - 0940-9602 UR - ISI:000189142300002 L2 - Caiman crocodilus;ovarian histology;follicular development;corpus luteum;PSEUDEMYS-SCRIPTA-ELEGANS; AMERICAN ALLIGATOR; REPRODUCTIVE-CYCLE; FOLLICULAR CELLS; GERMINAL BEDS; MISSISSIPPIENSIS; TURTLE; VERTEBRATES; FOLLICLES; OOGENESIS SO - Annals of Anatomy-Anatomischer Anzeiger 2004 ;186(1):13-24 10326 UI - 2979 AU - Calin A AU - Ramos-Remus C AU - Krupa D AU - Markind JE AU - McCormick CL AU - Reicin AS AU - Melian A AD - Royal Natl Hosp Rheumat Dis, Bath BA1 1RL, Avon, EnglandCtr Med Occidente, Dept Rheumatol, Guadalajara, Jalisco, MexicoMerck Res Labs, Rahway, NJ, USA TI - ASAS20 in ankylosing spondylitis (AS): Short term outcome in a NSAID trial MH - United Kingdom MH - Mexico|Jalisco MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000223799001698 SO - Arthritis and Rheumatism 2004 ;50(9):S614-S615 10327 UI - 4186 AU - Callaway TR AU - Anderson RC AU - Tellez G AU - Rosario C AU - Nava GM AU - Eslava C AU - Blanco MA AU - Quiroz MA AU - Olguin A AU - Herradora M AU - Edrington TS AU - Genovese KJ AU - Harvey RB AU - Nisbet DJ AD - ARS, Food & Feed Safety Res Unit, So Plains Agr Res Ctr, USDA, College Stn, TX 77845, USAUniv Arkansas, Ctr Excellence Poultry Sci, Fayetteville, AR 72701, USANatl Autonomous Univ Mexico, Fac Med Vet & Zootecn, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Med, Mexico City 04510, DF, MexicoCallaway, TR, ARS, Food & Feed Safety Res Unit, So Plains Agr Res Ctr, USDA, College Stn, TX 77845 USA TI - Prevalence of Escherichia coli O157 in cattle and swine in Central Mexico AB - Escherichia coli O157:H7 is a foodborne pathogenic bacterium that can reside undetected in the gastrointestinal tract of cattle because colonization by this bacterium is asymptomatic. Recent research has indicated that swine can carry and transmit this pathogen as well. The development of more advanced and sensitive detection techniques has improved the limit of detection and increased sensitivity for this important pathogen. This study was undertaken to determine the prevalence of E. coli O157 in cattle and swine in Mexico with the more sensitive detection technique of immunomagnetic bead separation. Samples (n = 60 per farm) were taken from four cattle and four swine farms (n = 240 cattle samples, n = 240 swine samples) located throughout central Mexico in October 2001. The prevalence of E. coli O157 was found to be only 1.25% on cattle farms and 2.1% on swine farms. The prevalence in cattle in this study is lower than that reported in the United States and could be related to the lower reported prevalence of E. coli O157 in humans in Mexico. However, further research is needed to verify prevalence throughout other regions of Mexico, as well as prevalence during other seasons of the year MH - Mexico|Distrito Federal MH - USA PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000224393600027 L2 - FEEDLOT CATTLE; RESERVOIR; FECES; PIGS; SHEEP SO - Journal of Food Protection 2004 ;67(10):2274-2276 10328 UI - 6020 AU - Calleja-Macias IE AU - Kalantari M AU - Huh J AU - Ortiz-Lopez R AU - Rojas-Martinez A AU - Gonzalez-Guerrero JF AU - Williamson AL AU - Hagmar B AU - Wiley DJ AU - Villarreal L AU - Bernard HU AU - Barrera-Saldana HA AD - Univ Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92697, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Bioquim, Monterrey 64460, MexicoUniv Autonoma Nuevo Leon, Fac Med, Dept Bioquim, Monterrey, MexicoUniv Autonoma Nuevo Leon, Univ Hosp, Monterrey, MexicoUniv Cape Town, Fac Hlth Sci, Natl Hlth Lab Serv, ZA-7925 Cape Town, South AfricaUniv Cape Town, Fac Hlth Sci, Inst Infect Dis & Mol Med, ZA-7925 Cape Town, South AfricaNatl Hosp, Dept Pathol, Oslo, NorwayUniv Calif Los Angeles, Sch Nursing, Los Angeles, CA 90095, USABernard, HU, Univ Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92697 USA TI - Genomic diversity of human papillomavirus-16, 18, 31, and 35 isolates in a Mexican population and relationship to European, African, and Native American variants AB - Cervical cancer, mainly caused by infection with human papillomaviruses (HPVs), is a major public health problem in Mexico. During a study of the prevalence of HPV types in northeastern Mexico, we identified, as expected from worldwide comparisons, HPV-16, 18, 31, and 35 as highly prevalent. It is well known that the genomes of HPV types differ geographically because of evolution linked to ethnic groups separated in prehistoric times. As HPV intra-type variation results in pathogenic differences, we analyzed genomic sequences of Mexican variants of these four HPV types. Among 112 HPV-16 samples, 14 contained European and 98 American Indian (AA) variants. This ratio is unexpected as people of European ethnicity predominate in this part of Mexico. Among 15 HPV-18 samples, 13 contained European and 2 African variants, the latter possibly due to migration of Africans to the Caribbean coast of Mexico. We constructed phylogenetic trees of HPV-31 and 35 variants, which have never been studied. Forty-six HPV-31 isolates from Mexico, Europe, Africa, and the United States (US) contained a total of 35 nucleotide exchanges in a 428-bp segment, with maximal distances between any two variants of 16 bp (3.7%), similar to those between HPV-16 variants. The HPV-31 variants formed two branches, one apparently the European, the other one an African branch. The European branch contained 13 of 29 Mexican isolates, the African branch 16 Mexican isolates. These may represent the HPV-31 variants of American Indians. as a 55% prevalence of African variants in Mexico seems incomprehensible. Twenty-seven HPV-35 samples from Mexico, Europe, Africa, and the US contained 11 mutations in a 893-bp segment with maximal distances between any two variants of only 5 mutations (0.6%), including a characteristic 16-bp insertion/deletion. These HPV-35 variants formed several phylogenetic clusters rather than two- or three-branched trees as HPV-16, 18, and 31. An HPV-35 variant typical for American Indians was not identifiable. Our research suggests type specific patterns of evolution and spread of HPV-16, 18, 31, and 35 both before and after the worldwide migrations of the last four centuries. The high prevalence of highly carcinogenic HPV-16 AA variants, and the extensive diversity of HPV-18, 31, and 35 variants with unknown pathogenic properties raise the possibility that HPV intra-type variation contributes to the high cervical cancer burden in Mexico. (C) 2004 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Nuevo Leon MH - Norway MH - South Africa PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 18 U4 - Virology U5 - J;Article AV - English IS - 0042-6822 UR - ISI:000220014400015 L2 - genomic diversity;papillomavirus;population;CERVICAL INTRAEPITHELIAL NEOPLASIA; WORLDWIDE PERSPECTIVE; RISK-FACTORS; TYPE-16 VARIANTS; DNA-SEQUENCES; CANCER; WOMEN; PREVALENCE; INFECTION; EPIDEMIOLOGY SO - Virology 2004 ;319(2):315-323 10329 UI - 3996 AU - Calonge FD AU - Kreisel H AU - Guzman G AD - CSIC, Real Jardin Bot, E-28014 Madrid, SpainInst Ecol, Xalapa 91000, Veracruz, MexicoCalonge, FD, CSIC, Real Jardin Bot, Plaza Murillo 2, E-28014 Madrid, Spain TI - Bovista sclerocystis, a new species from Mexico AB - Bovista sclerocystis is described as a new species. It was found in Mexico, growing on rich soil of a tropical forest. It belongs to section Globaria, series Albosquamosa. The most striking character of this taxon is the exoperidium composed of polymorphous mycosclereids MH - Mexico|Veracruz MH - Spain PB - LAWRENCE: ALLEN PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000224729900021 L2 - gasteromycetes;lycoperdaccae;tropical fungi SO - Mycologia 2004 ;96(5):1152-1154 10330 UI - 4556 AU - Calvet N AU - Muzerolle J AU - Briceno C AU - Hernandez J AU - Hartmann L AU - Saucedo JL AU - Gordon KD AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Los Andes, Merida, VenezuelaUniv Arizona, Steward Observ, Tucson, AZ 85721, USACtr Invest Astron, Merida 5010A, VenezuelaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCalvet, N, Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA TI - The mass accretion rates of intermediate-mass T Tauri stars AB - We present Hubble Space Telescope ultraviolet spectra and supporting ground-based data for a sample of nine intermediate-mass T Tauri stars (IMTTSs; 1.5-4 M-circle dot). The targets belong to three star-forming regions: T Tau, SU Aur, and RY Tau in the Taurus clouds; EZ Ori, P2441, and V1044 Ori in the Ori OB1c association surrounding the Orion Nebula cluster; and CO Ori, GW Ori, and GX Ori in the ring around lambda Ori. The supporting ground-based observations include nearly simultaneous UBV( R I) C photometry, 6 8 resolution spectra covering the range 3900-7000 Angstrom, optical echelle observations in the range 5800-8600 Angstrom, and K-band near-infrared spectra. We use these data to determine improved spectral types and reddening corrections and to obtain physical parameters of the targets. We find that an extinction law with a weak 2175 8 feature but high values of A(UV)/A(V) is required to explain the simultaneous optical-UV data; the reddening laws for two B-type stars located behind the Taurus clouds, HD 29647 and HD 283809, meet these properties. We argue that reddening laws with these characteristics may well be representative of cold, dense molecular clouds. Spectral energy distributions and emission-line profiles of the IMTTSs are consistent with expectations from magnetospheric accretion models. We compare our simultaneous optical-UV data with predictions from accretion shock models to get accretion luminosities and mass accretion rates ((M)over dot) for the targets. We find that the average mass accretion rate for IMTTSs is similar to3 z 10(-8) M-circle dot yr(-1), a factor of similar to5 higher than that for their low-mass counterparts. The new data extend the correlation between ((M)over dot) and stellar mass to the intermediate-mass range. Since the IMTTSs are evolutionary descendants of the Herbig Ae/Be stars, our results put limits to the mass accretion rates of their disks. We present luminosities of the UV lines of highly ionized metals and show that they are well above the saturation limit for magnetically active cool stars but correlate strongly with accretion luminosity, indicating that they are powered by accretion, in agreement with previous claims but using a sample in which reddening and accretion luminosities have been determined self-consistently. Finally, we find that the relation between accretion luminosity and Brgamma luminosity found for low-mass T Tauri stars extends to the intermediate-mass regime MH - USA MH - Mexico|Distrito Federal MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 58 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000223633800025 L2 - accretion, accretion disks;circumstellar matter;stars : formation;stars : pre-main-sequence;MAIN-SEQUENCE EVOLUTION; HERBIG-AE/BE STARS; EMISSION-LINE DIAGNOSTICS; HAMILTON ECHELLE SPECTRA; AURIGA MOLECULAR CLOUD; ORION NEBULA CLUSTER; MAGNETOSPHERIC ACCRETION; ULTRAVIOLET EXTINCTION; DISK ACCRETION; YOUNG STARS SO - Astronomical Journal 2004 ;128(3):1294-1318 10331 UI - 4332 AU - Calvo-Andrade O AU - Cerveau D AU - Giraldo L AU - Neto AL AD - CIMAT, Guanajuato 36000, MexicoInst Rech Math Rennes, F-35042 Rennes, FranceUniv Cadiz, Dept Matemat, Cadiz 11510, SpainInst Matematica Pura & Aplicada, Rio De Janeiro, BrazilCalvo-Andrade, O, CIMAT, Apartado Postal 402, Guanajuato 36000, Mexico TI - Irreducible components of the space of foliations associated to the affine Lie algebra AB - In this paper, we give the explicit construction of certain components of the space of holomorphic foliations of codimension one, in complex projective spaces. These components are associated to some algebraic representations of the affine Lie algebra aff(C). Some of them, the so-called exceptional or Klein-Lie components, are rigid in the sense that all generic foliations in the component are equivalent (Example 1). In particular, we obtain rigid foliations of all degrees. Some generalizations and open problems are given at the end of 1 MH - Brazil MH - France MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0143-3857 UR - ISI:000224119100002 L2 - HOLOMORPHIC FOLIATIONS; CP(N) SO - Ergodic Theory and Dynamical Systems 2004 ;24():987-1014 10332 UI - 3722 AU - Calvo H AU - Gelbukh A AD - Inst Politecn Nacl, Ctr Res Comp, Mexico City 07738, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Unsupervised learning of ontology-linked selectional preferences AB - We present a method for extracting selectional preferences of verbs from unannotated text. These selectional preferences are linked to an ontology (e.g. the hypernym relations found in WordNet), which allows for extending the coverage for unseen valency fillers. For example, if drink vodka is found in the training corpus, a whole WordNet hierarchy is assigned to the verb to drink (drink liquor, drink alcohol, drink beverage, drink substance, etc.), so that when drink gin is seen in a later stage, it is possible to relate the selectional preference drink vodka with drink gin (as gin is a co-hyponym of vodka). This information can be used for word sense disambiguation, prepositional phrase attachment disambiguation, syntactic disambiguation, and other applications within the approach of pattern-based statistical methods combined with knowledge. As an example, we present an application to word sense disambiguation based on the Senseval-2 training text for Spanish. The results of this experiment are similar to those obtained by Resnik for English MH - Mexico|Distrito Federal MH - South Korea T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlehcalvo@sagitario.cic.ipn.mx gelbukh@gelbukh.com0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBE01 AV - English IS - 0302-9743 UR - ISI:000225085900052 SO - 2004 ;():418-424 10333 UI - 4374 AU - Calvo H AU - Gelbukh A AD - Natl Polytech Inst, Ctr Res Comp, Mexico City 07738, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Acquiring selectional preferences from untagged text for prepositional phrase attachment disambiguation AB - Extracting information automatically from texts for database representation requires previously well-grouped phrases so that entities can be separated adequately. This problem is known as prepositional phrase (PP) attachment disambiguation. Current PP attachment disambiguation systems require an annotated treebank or they use an Internet connection to achieve a precision of more than 90%. Unfortunately, these resources are not always available. In addition, using the same techniques that use the Web as corpus may not achieve the same results when using local corpora. In this paper, we present an unsupervised method for generalizing local corpora information by means of semantic classification of nouns based on the top 25 unique beginner concepts of WordNet. Then we propose a method for using this information for PP attachment disambiguation MH - Mexico|Distrito Federal MH - South Korea T3 - NATURAL LANGUAGE PROCESSING AND INFORMATION SYSTEMSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlehcalvo@sagitario.cic.ipn.mx gelbukh@gelbukh.com1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAV30 AV - English IS - 0302-9743 UR - ISI:000223761800018 SO - 2004 ;():207-216 10334 UI - 5943 AU - Calvo H AU - Gelbukh A AD - Natl Polytech Inst, Ctr Res Comp, Mexico City 07738, DF, MexicoChung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South KoreaCalvo, H, Natl Polytech Inst, Ctr Res Comp, Av Juan Dios Batiz S-N,Esq Av Mendizabal, Mexico City 07738, DF, Mexico TI - Extracting semantic categories of nouns for syntactic disambiguation from human-oriented explanatory dictionaries AB - Syntactic disambiguation frequently requires knowledge of the semantic categories of nouns, especially in languages with free word order. For example, in Spanish the phrases pinto un cuadro un pintor (lit. painted a picture a painter) and pinto un pintor un cuadro (lit. painted a painter a picture) mean the same: 'a painter painted a picture'. The only way to tell the subject from the object is by knowing that pintor 'painter' is a causal agent and cuadro is a thing. We present a method for extracting semantic information of this kind from existing machine-readable human-oriented explanatory dictionaries. Application of this procedure to two different human-oriented Spanish dictionaries gives additional information as compared with using solely Spanish EuroWordNet. In addition, we show the results of an experiment conducted to evaluate the similarity of word classifications using this method MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000189417900032 SO - Computational Linguistics and Intelligent Text Processing 2004 ;2945():258-261 10335 UI - 6542 AU - Camacho AS AU - Bohorquez J AU - Gutierrez RM AU - Carrillo JL AD - Univ Los Andes, Dept Fis, Bogota, ColombiaUniv Antonio Narino, Ctr Invest, Bogota, ColombiaUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoCamacho, AS, Univ Los Andes, Dept Fis, Bogota, Colombia TI - Optical effects based on intersub-band-transitions in quantum wells AB - Unipolar devices based on intersub-band-transition have been developed in the last decade [Appl. Phys. Lett. 65 (1994) 2901]. However, this technique will not be directed applicable for the longer wavelengths corresponding to Tetrahertz frequencies. In this work we analyze a THz device based on the intersub-band-transitions of an asymmetric double quantum well. We first study the intersub-band optical absorption in superlattice made of asymmetric double quantum wells tailored as a three level system. By applying an external electric field we obtain the Wannier-Stark ladder and can tune the transition energies between the sub-bands to reach the THz absorption between the two excited sub-bands. Although the dipole moments are big, the relative THz absorption to the other frequencies is small. However, reported lifetimes for this system encourage the possibility of getting population inversion, which is the main condition to design a laser. With this goal, it is presented a detailed study of the geometric design of the asymmetric double quantum well by performing an accurate calculation of the energies and wave functions, the dipole moments and the electron-LO-phonon interaction form factors, which are important ingredients of the scattering rates results. Furthermore, we analyze the role of electron-LO-phonon scattering in THz devices. (C) 2004 Elsevier Ltd. All rights reserved MH - Colombia MH - Mexico|Puebla PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000187752200007 L2 - quantum wells;ultrafast light pulses;electron-LO-phonon scattering rates;absorption;laser design;SOLVABLE MODEL; LASER SO - Microelectronics Journal 2004 ;35(1):27-31 10336 UI - 6194 AU - Camacho MD AU - Phillipson JD AU - Croft SL AU - Yardley V AU - Solis PN AD - Univ Autonoma Nuevo Leon, Fac Ciencias Quim, San Nicolas de los Garza 66400, Nuevo Leon, MexicoUniv Panama, Fac Farm, CIFLORPAN, Panama City, PanamaLondon Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1, EnglandUniv London, Sch Pharm, Ctr Pharmacognosy & Phytotherapy, London WC1N 1AX, EnglandCamacho, MD, Univ Autonoma Nuevo Leon, Fac Ciencias Quim, Ciudad Univ, San Nicolas de los Garza 66400, Nuevo Leon, Mexico TI - In vitro antiprotozoal and cytotoxic activities of some alkaloids, quinones, flavonoids, and coumarins AB - Twenty-six pure plant-derived compounds including alkaloids, quinones, flavonoids, and coumarins, obtained from five species of Central American plants associated with traditional uses, were tested in vitro for antiprotozoal and cytotoxic activities. The quinone, 1-acetyl-benzoisochromanquinone displayed significant antiprotozoal activity against Leishmania donovani promastigotes and amastigotes, Trypanosoma cruzi amastigotes, and T. brucei brucei bloodstream form trypomastigotes, with IC50 values of 2.32, 1.98, 6.60, and 0.65 muM, respectively. The quinones benzo[g]isoquinoline-5,10-dione had an IC50 value of 4.2 muM against Plasmodium falciparum and 1-hydroxybenzoisochromanquirione an IC50 value of 3.3 muM against T. b. brucei trypomastigotes. The remaining compounds were either weakly active or inactive MH - United Kingdom MH - Mexico|Nuevo Leon MH - Panama PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0032-0943 UR - ISI:000189041000015 L2 - INVITRO SO - Planta Medica 2004 ;70(1):70-72 10337 UI - 4039 AU - Camarena B AU - Aguilar A AU - Loyzaga C AU - Graff A AU - Weissbecker K AU - Nicolini H AD - Inst Nacl Psiquitria Ramon Fuente, Mexico City, DF, MexicoTulane Univ, New Orleans, LA 70118, USAMexico City Univ, Mexico City, DF, Mexico TI - The DRD4 gene is associated with obsessive compulsive disorder: A confirmation study MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000223742600243 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2004 ;130B(1):64-64 10338 UI - 6231 AU - Camarena EA AU - Gracia C AU - Sixto JMC AD - Univ Guanajuato, Inst Agr Sci, Irapuato, Gto, MexicoUniv Politecn Valencia, Mech Agr Dept, Valencia, SpainCamarena, EA, Univ Guanajuato, Inst Agr Sci, Irapuato, Gto, Mexico TI - A mixed integer linear programming machinery selection model for multifarm systems AB - An integrated program, called MULTIPREDIO, was developed at University of Guanajuato and University Polytechnic of Valencia using mixed integer linear programming linked to several databases contained in spreadsheets to select agricultural machinery for a multifarm system. The program selects the machinery set for each farm, which corresponds to the lowest annual mechanisation cost of the multifarm system through time. The input information consists of variable and fixed costs for 12 yr from the multifarm, the schedule of operations and the different combinations of equipment and the area of each farm. The program works under the environment of the worksheet and the user does not require knowledge of linear programming to understand the input and output of the model program. The program is capable of calculating the number of working days required for each tractor-implement at each farm in the different periods, and also allows to study the effect of changing values on fixed and variable costs through time. A case in Guanajuato, Mexico, for five farms cultivating wheat and sorghum is used to demonstrate the model application because the mechanisation costs are reduced during the passage of time (at the present value), thus affecting the optimum solution in such a way that alternative solutions are found through time. The optimum solution of the machinery park selected for the first year is not the same as that selected through other years. For the studied case three optimal solutions were found, one of them for years 1-5, another one for years 6-8 and the last one for years 9-12. In case of machinery, the optimal solution is below the quantity of tractors available on the five farms. (C) 2003 Silsoe Research Institute. All rights reserved Published by Elsevier Ltd MH - Mexico|Guanajuato MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Engineering U5 - J;Article AV - English IS - 1537-5110 UR - ISI:000188966200003 SO - Biosystems Engineering 2004 ;87(2):145-154 10339 UI - 4932 AU - Camargo-Ricalde SL AU - Dhillion SS AU - Garcia-Garcia V AD - Agr Univ Norway, Dept Ecol & Nat Resource Management, N-1432 As, NorwayUniv Autonoma Metropolitana Iztapalapa, Dept Biol, Div Ciencias Biol & Salud, Mexico City 09340, DF, MexicoDhillion, SS, Agr Univ Norway, Dept Ecol & Nat Resource Management, POB 5014, N-1432 As, Norway TI - Phenology, and seed production and germination of seven endemic Mimosa species (Fabaceae-Mimosoideae) of the Tehuacan-Cuicatlan Valley, Mexico AB - We report on the phenology, seed production, and three assays (field, greenhouse and laboratory) to detect the optimal temperature for germination (OPT) and the temperature with fastest germination rate (TFASG) of seven Mimosa species, all endemic to Mexico: Mimosa adenantheroides (M. Martens and Galeotti) Benth., M. Calcicola B. L. Rob., M. lacerata Rose, M. luisana Brandegee, M polyantha Benth., M. purpusii Brandegee and M. texana (A. Gray) Small var. filipes (Britton and Rose) Barneby. Flowering and fruiting take place during the wet season (May-September). Though flowering periods overlap among species, no hybrid species were found. The reproductive strategy includes a large number of seeds produced (4000-15000 per plant); however, a high percentage (30-75%) is not viable due to bruchid predation (Acanthoscelides mexicanus (Sharp) and Stator pruininus Horn). In the laboratory, OPT was established at (23degreesC)24degreesC(27-28degreesC) and TFASG at (20degreesC)25degreesC(30degreesC), with 100% of germination in six of the seven Mimosa species. In the field, the maximum germination rate (MAXG) was 92% to 100%, whereas in the greenhouse this value was 56% to 80%. Our results show that heat and moisture do not necessarily stress Mimosa seedling germination, but shade seems to be an important factor influencing germination. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Norway PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000222717700002 L2 - arid;endemics;Mimosa;Mexico;reforestation;restoration;seed predation;CACTUS NEOBUXBAUMIA-TETETZO; LEGUMINOSAE; AGROFORESTRY; TEMPERATURE; LUISANA; TREES SO - Journal of Arid Environments 2004 ;58(4):423-437 10340 UI - 5734 AU - Camargo MC AU - Lazcano-Ponce E AU - Torres J AU - Velasco-Mondragon E AU - Quiterio M AU - Correa P AD - Natl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca 62508, Morelos, MexicoMexican Inst Social Secur, Infect Dis Res Unit, Mexico City, DF, MexicoLouisiana State Univ, Hlth Sci Ctr, Dept Pathol, New Orleans, LA, USALazcano-Ponce, E, Natl Inst Publ Hlth, Ctr Populat Hlth Res, Ave Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Determinants of Helicobacter pylori seroprevalence in Mexican adolescents AB - Background. Helicobacter pylori infection is one of the most common human infections and is considered to play an etiologic role in several gastroduodenal diseases. In this study we determined the H. pylori seroprevalence among adolescents in Morelos, Mexico, and explored the association between seroprevalence and socioeconomic, dietary and lifestyle variables. Materials and Methods. A cross-sectional study was conducted in 5861 Mexican subjects aged 11-21 years. H. pylori infection was determined by an enzyme-linked immunosorbent assay previously validated in Mexico. A self-administered questionnaire was used to collect information on sociodemographic factors, housing, living conditions and food consumption. Multivariate logistic regression methods were used to obtain odds ratios and 95% confidence intervals. Results. The overall H. pylori seroprevalence was 47.6%; 40.6% in preadolescents (11-14 years), 48.6% in adolescents (15-17 years), and 59.8% in young adults (18-24 years). A positive association was found between age and H. pylori seroprevalence. Inverse associations were found for availability of drinking water, sewerage, and home appliances at the time of the subject's birth, a proxy variable of socioeconomic status. Intake of milk products and total fats was positively associated with infection. Conclusions. This large seroprevalence study showed that H. pylori infection is frequent among adolescents in Mexico. An early acquisition of infection is indirectly suggested. Some variables denoting low socioeconomic status were inversely associated with H. pylori seroprevalence. Associations with intake of milk products and total fats suggest new hypotheses in this field of research MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 8 U4 - Gastroenterology & Hepatology;Microbiology U5 - J;Article AV - English IS - 1083-4389 UR - ISI:000220847300003 L2 - students;adolescents;Helicobacter pylori;seroprevalence;Mexico;INFECTION; CHILDREN; PREVALENCE; TRANSMISSION; EPIDEMIOLOGY; SEROPOSITIVITY; QUESTIONNAIRE; CONSUMPTION; ACQUISITION; DISEASE SO - Helicobacter 2004 ;9(2):106-114 10341 UI - 2168 AU - Campero-Arena G AU - Truss JK AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoUniv Leeds, Dept Pure Math, Leeds LS2 9JT, W Yorkshire, EnglandCampero-Arena, G, Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Countable 1-transitive coloured linear orderings II AB - This paper gives a structure theorem for the class of countable 1-transitive coloured linear orderings for a countably infinite colour set, concluding the work begun in [1]. There we gave a complete classification of these orders for finite colour sets, of which there are N-1. For infinite colour sets, the details are considerably more complicated, but many features from [1] occur here too, in more marked form, principally the use (now essential it seems) of coding trees, as a means of describing the structures in our list, of which there are now 2(NO) MH - United Kingdom MH - Mexico|Distrito Federal PB - WARSAW 10: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0016-2736 UR - ISI:000229321400001 SO - Fundamenta Mathematicae 2004 ;183(3):185-213 10342 UI - 5369 AU - Camporredondo JE AU - Castillejos AH AU - Acosta FA AU - Gutierrez EP AU - Herrera MA AD - CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoRensselaer Polytech Inst, Troy, NY, USAHYLSA SA, CV, San Nicolas de los Garza, NL, MexicoCamporredondo, JE, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, Mexico TI - Analysis of thin-slab casting by the compact-strip process: Part I. Heat extraction and solidification AB - This article reports on an extensive experimental and modeling study undertaken to elucidate the thermal evolution of thin slabs during their passage through the mold and secondary cooling system of a compact-strip process (CSP) caster. In industrial trials covering a wide range of casting conditions, temperature measurements were carried out at (1) the copper plates of an operating mold and (2) the stainless steel frame of an operating grid. Separately, water-flux and heat-flux distributions generated by the several water and air-mist sprays produced by the different nozzles used in the process were determined in the laboratory. The analysis of these pieces of information, together with a detailed consideration of the geometry of the mold and the arrangement of the rolls and spray nozzles, were used to establish appropriate boundary conditions for a two-dimensional, curvilinear-coordinate, unsteady-state heat-conduction model for predicting the solidification rate of thin slabs. The predicted slab surface temperatures show very good agreement with corresponding measured values taken in plant tests at several locations along and across the secondary cooling system. The validation trials involved a wide range of low- and medium-carbon steel grades, casting speeds, slab widths, and secondary cooling strategies. The second part of this article combines the solidification model with a creep model of the shell to yield useful information about design parameters and casting conditions associated with undesirable bulging behavior of the slab after the last support roll, which causes stoppage of the process by slab clogging at the pinch rolls MH - Mexico|Coahuila MH - Mexico|Nuevo Leon MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000221669700011 L2 - MACHINE; MOLDS; STEEL SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2004 ;35(3):541-560 10343 UI - 5370 AU - Camporredondo JE AU - Acosta FA AU - Castillejos AH AU - Gutierrez EP AU - De la Gonzalez R AD - CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoRensselaer Polytech Inst, Hartford, CT 06120, USAHYLSA SA, CV, San Nicolas, NL, MexicoCamporredondo, JE, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, Mexico TI - Analysis of thin-slab casting by the compact-strip process: Part II. Effect of operating and design parameters on solidification and bulging AB - The mathematical model to compute the thermal evolution and solidification of thin slabs, previously presented in Part I of this article, was used in combination with a three-dimensional (3-D) finite-element thermomechanical model to analyze how actual operation conditions can lead to excessive deflection and jamming of the slab shell at the pinch rolls. The models suggest that these phenomena arise from a sudden loss of control of the metallurgical length stemming from the coupling of inappropriate steel superheats and casting velocities to deficient heat-extraction conditions at the mold or secondary cooling system. The bulging deformation was calculated with an elastic and creep model that takes, into account the temperature distribution across the shell thickness and the different times that shell elements have to creep exposure, i.e., according to the time that rows of elements require to reach their current position in the casting direction at a given casting speed. The last point was simulated[ by varying the duration of application of the ferrostatic load to the inside surface of each row of elements. The conditions forecast by the models as being responsible for excessive bulging agree very well with those present during the occurrence of these events in the plant. Since bulging after the last containment roll is a major limitation to productivity, this article also presents a parametric evaluation of the casting-speed limits that two compact-strip process (CSP) casters with different supported lengths may have as a function of steel superheat, mold heat-extraction level, water flow rate of the spray and air-mist nozzles, and slab thickness MH - Mexico|Coahuila MH - Mexico|Nuevo Leon MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5615 UR - ISI:000221669700012 L2 - STEEL; SEGREGATION; SIMULATION SO - Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science 2004 ;35(3):561-573 10344 UI - 5522 AU - Campos-Enriquez JO AU - Chavez-Garcia FJ AU - Cruz H AU - costa-Chang JG AU - Matsui T AU - Arzate JA AU - Unsworth MJ AU - Ramos-Lopez J AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoCICESE, Dept Sismol, Ensenada, Baja California, MexicoUniv Tokyo, Dept Earth & Planetary Phys, Tokyo, JapanUNAM, Ctr Geociencias, Juriquilla, Queretaro, MexicoUniv Alberta, Inst Geophys Res, Edmonton, AB T6G 2J1, CanadaUniv Nacl Autonoma Mexico, Fac Ingn, Mexico City 04510, DF, MexicoCampos-Enriquez, JO, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Shallow crustal structure of Chicxulub impact crater imaged with seismic, gravity and magnetotelluric data: inferences about the central uplift AB - The structure of the onshore portion of the Chicxulub impact crater (Yucatan, Mexico) has been studied with seismic, gravity and magnetotelluric (MT) exploration methods. A dispersion analysis of Rayleigh waves along a 150- km long, east- west profile permitted the shallow Tertiary cover to be imaged to a depth of 400 m. Three layers were mapped. The thickness of the first two layers increase as we approach the sinkhole ring from the exterior of the crater (consistent with the existence of a central basin). Those thicknesses change from 100- 150 m outside the crater rim to more than 200 m in the terrace zone. At the crater centre, the first layer is again approximately 100 m thick and has a low shear wave velocity (approximately 1 km s(-1)). Its velocity is slightly larger in the rest of the profile. Outside the central basin, we observed a third layer with a shear wave velocity larger than 1.8 km s(-1), but its thickness could not be determined. The velocity distribution along our profile increases monotonously with depth, without low- velocity layers. The inferred inward slope of the two shallow layers immediately outside the central basin correlates well with a smooth gravity gradient. In addition, we present results of detailed gravity measurements along a profile that coincides (in part) with the line covered by the seismic experiment. These gravity measurements were inverted to obtain a density model. In this model (which is of course non- unique), the steep gravity gradients are explained by the faults along which the slumping of the terrace blocks took place. Two of these may correspond to the faults observed at radial distances of 85 and 96 km in offshore seismic data. Finally, we show results obtained using MT soundings. They provide additional, independent constraints on the structure of the Chicxulub crater. MT soundings at the centre of the crater show a sharper increase in resistivity than elsewhere in the impact structure. This sharper increase in resistivity may be related to the uplifted basement of the structural high at a depth of 4 km. Only the MT soundings located over the central gravity high display this feature. Our three different data sets are independently consistent with the existence of a central structural high in the crater and support a twin- peak shape for this high MH - Canada MH - Japan MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000221422500003 L2 - Bouguer gravity;central structural high;Chicxulub impact crater;MT;Rayleigh wave dispersion;sinkhole ring;CRETACEOUS-TERTIARY BOUNDARY; YUCATAN PENINSULA; DRILLING PROGRAM; MEXICO-CITY; CONSTRAINTS; SIZE; GLASSES; ROCKS; BASIN SO - Geophysical Journal International 2004 ;157(2):515-525 10345 UI - 4117 AU - Campos-Gongora E AU - Ebert F AU - Willhoeft U AU - Said-Fernandez S AU - Tannich E AD - Bernhard Nocht Inst Trop Med, Dept Mol Parasitol, D-20359 Hamburg, GermanyAutonomous Univ Nuevo Leon, Sch Publ Hlth & Nutr, Monterrey, MexicoMexican Inst Publ Hlth, Biomed Res Ctr NE, Dept Mol & Cellular Biol, Monterrey, MexicoTannich, E, Bernhard Nocht Inst Trop Med, Dept Mol Parasitol, Bernhard Nocht Str 74, D-20359 Hamburg, Germany TI - Characterization of chitin synthases from Entamoeba AB - A major component of the Entamoeba cyst wall is chitin, a homopolymer of beta-(1,4)-linked N-acetyl-D-glucosamine. Polymerization of chitin requires the presence of active chitin synthases (CHS), a group of enzymes belonging to the family of beta-glycosyl transferases. CHS have been described for fungi, insects, and nematodes; however, information is lacking about the structure and expression of this class of enzymes in protozoons such as Entamoeba. In this study, the primary structures of two putative E. histolytica CHS (EhCHS-1 and EhCHS-2) were determined by gene cloning and homologous proteins were identified in databases from E. dispar and the reptilian parasite E. invadens. The latter constitutes the widely used model organism for the study of Entamoeba cyst development. The two ameba enzymes revealed between 23% and 33% sequence similarity to CHS from other organisms with full conservation of all residues critically important for CHS activity. Interestingly, EhCHS-1 and EhCHS-2 differed substantially in their predicted molecular weights (73 kD vs. 114 kD) as well as in their isoelectric points (5.04 vs. 8.05), and homology was restricted to a central stretch of about 400 amino acid residues containing the catalytic domain. Outside the catalytic domain, EhCHS-1 was predicted to have seven transmembrane helices (TMH) of which the majority is located within the C-terminal part, resembling the situation found in yeast; whereas, EhCHS-2 is structurally related to nematode or insect chitin synthases, as it contained 17 predicted TMHs of which the majority is located within the N-terminal part of the molecule. Northern blot analysis revealed that genes corresponding to CHS-1 and CHS-2 are not expressed in Entamoeba, trophozoites, but substantial amounts of CHS-1 and CHS-2 RNA were present 4 to 8 hours after induction of cyst formation by glucose deprivation of E. invadens. The time-courses of expression differed slightly between the two ameba CHS genes, as in contrast to CHS-1 RNA, expression of CHS-2 RNA was more transient and no plateau was observed between 8 and 16 hours of encystation. However, both CHS RNAs were no longer detectable after 48 hours when most of the cells had been transformed into mature cysts MH - Germany MH - Mexico|Nuevo Leon PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 1434-4610 UR - ISI:000224441100009 L2 - SACCHAROMYCES-CEREVISIAE; CYST FORMATION; INVADENS; ENCYSTATION; HISTOLYTICA; EXPRESSION; STAGE; IDENTIFICATION; TROPHOZOITES; INDUCTION SO - Protist 2004 ;155(3):323-330 10346 UI - 3597 AU - Campos-Teran J AU - Mas-Oliva J AU - Castillo R AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoCampos-Teran, J, Lund Univ, POB 124, S-22100 Lund, Sweden TI - Interactions and conformations of alpha-helical human apolipoprotein CI on hydrophilic and on hydrophobic substrates AB - Interactions between amphiphilic alpha-helical human apolipoprotein CI (APO CI) adsorbed on hydrophilic and on hydrophobic surfaces were studied using an interferometric surface force apparatus in an effort to understand the surface conformation and the binding activity of this protein. We used mica as the hydrophilic substrate and polymerized octadecyltriethoxysilane (OTE)-covered mica as the hydrophobic substrate. The OTE monolayer and the OTE Langmuir-Blodgett film were studied using Brewster angle microscopy and atomic force microscopy, respectively. We found that interaction forces between layers of APO CI adsorbed on hydrophilic and on hydrophobic surfaces are mainly due to electrostatic double-layer forces at large surface distances and to steric repulsive forces at small distances. In some cases, no force was measured prior to finding a steric wall, suggesting that a complete neutralization of the surface charge was achieved by the protein adsorption. Protein layer thickness values allow us to give an image of the organization and conformation of the APO CI protein on surfaces. The adhesion obtained in both kinds of surfaces indicates that the interaction between the hydrophobic sides of the APO CI proteins is stronger than that between the hydrophilic sides of the protein MH - Mexico|Distrito Federal MH - Sweden PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000225925100074 L2 - AQUEOUS-ELECTROLYTE SOLUTIONS; ADSORBED LAYERS; MICA SURFACES; FORCE MEASUREMENTS; PHASE-TRANSITIONS; BRIDGING BUBBLES; MONOLAYERS; ATTRACTION; WATER; ADSORPTION SO - Journal of Physical Chemistry B 2004 ;108(52):20442-20450 10347 UI - 5262 AU - Campos E AD - Univ Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoCampos, E, 4492 Camino Pl,PMB 8108, San Ysidro, CA 92173, USA TI - Raytheres, a new name for Raymondia Campos, 2002 (Crustacea : Brachyura : Pinnotheridae) preoccupied by Raymondia Frauenfeld, 1855 (Hexapoda : Diptera : Streblidae) MH - Mexico|Baja California MH - USA PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000222068600015 SO - Journal of Crustacean Biology 2004 ;24(2):372-372 10348 UI - 6174 AU - Campos E AU - Urias J AU - Rulkov NF AD - UASLP, IICO, San Luis Potosi 78000, MexicoUniv Calif San Diego, INLS, San Diego, CA 92093, USACampos, E, UASLP, IICO, San Luis Potosi 78000, Mexico TI - Multimodal synchronization of chaos AB - An elementary notion of master-slave synchronization that accepts multimodal synchronization is introduced. We prove rigorously that the attractor of a coupled pair in a regime of multimodal synchronization is the graph of a multivalued function. Our framework provides the theoretical basis for some practical tools for detection of multimodal synchrony in experiments. Results are illustrated with the analysis of experiments with coupled electronic oscillators. (C) 2004 American Institute of Physics MH - Mexico|San Luis Potosi MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000189264700007 L2 - GENERALIZED SYNCHRONIZATION; SYSTEMS SO - Chaos 2004 ;14(1):48-54 10349 UI - 4721 AU - Campos FV AU - Coronas FIV AU - Beirao PSL AD - Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Biochem & Immunol, BR-30161970 Belo Horizonte, MG, BrazilNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoBeirao, PSL, Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Biochem & Immunol, Caixa Postal 486, BR-30161970 Belo Horizonte, MG, Brazil TI - Voltage-dependent displacement of the scorpion toxin Ts3 from sodium channels and its implication on the control of inactivation AB - 1 The voltage-dependent displacement of the scorpion Tityus serrulatus alpha-toxin Ts3 was investigated in native sodium channels of GH3 cells by examining the removal of its effects in toxin-free solution. 2 Toxin at saturating concentration was pulsed (similar to1 s) directly onto the cell, thus causing an eightfold increase of the slow component (tau(s)=6 ms) of fast inactivation, and a three-fold increase of the time constant of its fast component. 3 At 0 mV, maximal conductance was achieved in cells before and after treatment with Ts3, and no displacement of the toxin could be detected. 4 Toxin displacement occurred if stronger depolarising pulses (>100 mV) were applied. The rate of displacement depended on the amplitude and duration of the pulses, and was not related with outward Na+ flux. 5 We propose a model in which activation does not require complete movement of segment S4 of domain IV (IVS4) and that a more extensive movement of this segment is needed for normal fast inactivation. A kinetic model is presented that can account for the typical effects of site 3 toxins MH - Brazil MH - Mexico|Morelos PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0007-1188 UR - ISI:000223201500009 L2 - inactivation;sodium channel;sodium current;scorpion toxin;patch clamp;mechanism of action;voltage-dependence;Q matrix;ACTION POTENTIAL NA; GATED ION CHANNELS; MOLECULAR-MECHANISMS; TITYUS-SERRULATUS; GATING CURRENT; ALPHA-TOXINS; DOMAIN IV; BINDING; S4; ACTIVATION SO - British Journal of Pharmacology 2004 ;142(7):1115-1122 10350 UI - 5715 AU - Campos JE AU - Whitaker JR AU - Yip TT AU - Hutchens TW AU - Blanco-Labra A AD - IPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioquim, Unidad Irapuato, Guanajuato 39500, MexicoCiphergene Biosyst Inc, Palo Alto, CA 94306, USAUniv Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USAUniv Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Unidad Biotecnol & Prototipos, Tlalnepantla 54000, Mexico, MexicoBlanco-Labra, A, IPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioquim, Unidad Irapuato, Ap Postal 629, Guanajuato 39500, Mexico TI - Unusual structural characteristics and complete amino acid sequence of a protease inhibitor from Phaseolus acutifolius seeds AB - Two isoforms of a protease inhibitor were isolated by ion-exchange chromatography of tepary bean (Phaseolus acutifolius G.) seed proteins. The main isoform was used to determine the amino acid sequence of the protein. It is an 80 amino acid residue protein with a molecular mass of 8765 Da, showing sequence homology with the Bowman-Birk family of protease inhibitors. Several regions with amino acid microheterogeneity were found, corroborating the possible presence of isoforms. Mass spectrometry analysis was carried out to confirm isoforms. The presence of dimer and trimer forms of the inhibitor was shown through electrophoresis and mass spectrometry. Another unusual characteristic for this inhibitor was its ability to bind metals. The presence of four sequential histidines at the N-terminal end of the protein could account for this binding. Mass spectrometry and atomic absorption spectroscopy support the presence of calcium in the native inhibitor. (C) 2004 Elsevier SAS. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Estado De Mexico MH - USA PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0981-9428 UR - ISI:000220768600005 L2 - amino acid sequence;Bowman-Birk;metal-binding;phaseolus actitifolius;protease inhibitor;tepary bean;PEANUT ARACHIS-HYPOGAEA; CRYSTAL-STRUCTURE; A-II; PROTEINS; PURIFICATION; RESISTANCE; RESOLUTION; PATHOGENS; CLEAVAGE SO - Plant Physiology and Biochemistry 2004 ;42(3):209-214 10351 UI - 3351 AU - Campuzano JC AU - Hernandez-Avila M AU - Jaakkola MS AU - Ponce EL AU - Morales PK AU - Bautista P AU - Benowitz NL AU - Ceraso M AU - Blackford A AU - Samet JM AD - Inst Salud Publ, Ctr Invest Salud Poblac, Cuernavaca, Morelos, MexicoFinnish Inst Occupat Hlth, Helsinki, FinlandDirecc Gen Epidemiol, Secretaria Salud, Mexico City, DF, MexicoUniv Calif San Francisco, Div Clin Pharmacol, Dept Med, San Francisco, CA 94143, USAUniv Calif San Francisco, Div Clin Pharmacol, Dept Psychiat, San Francisco, CA 94143, USAUniv Calif San Francisco, Div Clin Pharmacol, Dept Biopharmaceut Sci, San Francisco, CA 94143, USAJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD 21218, USAJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Biostat, Baltimore, MD 21218, USAHernandez-Avila, M, Av Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Determinants of salivary cotinine levels among current smokers in Mexico AB - The present study describes salivary cotinine levels and their relationship to cigarettes smoked per day in Mexican smokers. Using a sampling strategy based on the number of cigarettes per day, we recruited 1,222 smokers from Mexico City and the state of Morelos in Mexico during 1999. Smoking behaviors and other factors known to affect nicotine intake and cotinine level were identified in an interview using a standardized questionnaire. Salivary cotinine was measured by capillary gas chromatography with nitrogen-phosphorus detection. We used generalized additive models to describe the relationship between salivary cotinine levels and variables of interest. The mean age of the population was 39.7 years (SD = 15.6 years), with a mean cotinine level of 194.7 ng/ml (SD = 134.8; range = 10.1-767). Participants smoked a mean of 15.5 cigarettes per day (SD = 11.3). Salivary cotinine and cigarettes smoked per day were positively related, although the association was not linear. flattening above 20 cigarettes per day. After adjusting for cigarettes per day, we found that significant predictors of cotinine levels included age, body mass index, cigarette producer, and smoking behavior variables. These results may have, implications for dosing with nicotine medications to aid smoking cessation in Mexican smokers and suggest that whether the cigarette is labeled light or regular has no relationship to nicotine dose from smoking cigarettes MH - Finland MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1462-2203 UR - ISI:000226385400008 L2 - NICOTINE PATCH THERAPY; SELF-REPORTED SMOKING; CIGARETTE-SMOKING; TOBACCO-SMOKE; EXPOSURE; CONSUMPTION; METABOLISM; HEALTH SO - Nicotine & Tobacco Research 2004 ;6(6):997-1008 10352 UI - 4922 AU - Candel A AU - Quiroga-Barranco R AD - Calif State Univ Northridge, Dept Math, Northridge, CA 91330, USACINVESTAV IPN, Dept Math, Mexico City 07300, DF, MexicoCandel, A, Calif State Univ Northridge, Dept Math, Northridge, CA 91330 USA TI - Parallelisms, prolongations of Lie algebras and rigid geometric structures AB - For geometric structures of type Q, we prove that being rigid depends only on the stabilizers for the action on Q. We also prove that to any rigid structure we can associate a ''natural'' parallelism. Moreover, if the rigid structure is analytic, then the parallelism can be taken to be analytic as well. This implies an extension theorem for infinitesimal Killing fields. As an application we obtain Gromov's centralizer theorem for arbitrary analytic rigid unimodular structures MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-2611 UR - ISI:000222645900005 SO - Manuscripta Mathematica 2004 ;114(3):335-350 10353 UI - 6335 AU - Candia L AU - Marquez J AU - Cucurull E AU - Navarro C AU - Amigo MC AU - Espinoza LR AD - Louisiana State Univ, Sch Med, Rheumatol Sect, New Orleans, LA, USANatl Inst Resp Dis INER, Mexico City, DF, MexicoNatl Inst Cardiol, Mexico City, DF, Mexico TI - Vascular endothelial growth factor urinary excretion in patients with lupus nephritis and correlation with disease activity MH - Mexico|Distrito Federal MH - USA PB - HAMILTON: B C DECKER INC RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Meeting Abstract AV - English IS - 1081-5589 UR - ISI:000188254600744 SO - Journal of Investigative Medicine 2004 ;52(1):S287-S287 10354 UI - 5625 AU - Canet C AU - Alfonso P AU - Melgarejo JC AU - Belyatsky BV AD - Univ Nacl Autonoma Mexico, Inst Geofis, Dept Recursos Nat, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristal Lografia Mineral & Diposits Minerals, E-08028 Barcelona, SpainRAS, Inst Precambrian Geol & Geochronol, St Petersburg 199034, RussiaCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Dept Recursos Nat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Geochemical evidences of sedimentary-exhalative origin of the shale-hosted PGE-Ag-Au-Zn-Cu occurrences of the Prades Mountains (Catalonia, Spain): trace-element abundances and Sm-Nd isotopes AB - The Llandoverian black shales of the Prades Mountains, SW Catalonian Coastal Ranges, contain several metamorphosed stratiform sulfide deposits. The mineralized interval, up to 30 in in thickness, consists of interbedded sulfide-rich (mostly pyrrhotite) shales, feldspar-rich layers and apatite beds. The ore contains Zn, Cu, Pb, An, Ag and PGE. Whole-rock trace-element analyses were performed by ICP-MS, and the results were normalized to NASC reference standard. The REE patterns show enrichment in Eu (La) and a strong depletion in Ce. This distribution is compatible with REE mostly inherited from seawater, but a significant hydrothermal component is inferred for Eu. Profiles of redox-sensitive trace elements show great V, Cr, Ni, Co, Mo and U enrichments with respect to NASC standard. Part of this enrichment could derive from a direct precipitation from seawater, favoured by the euxinic conditions of the Silurian basin. Nevertheless, V (up to 5444 ppm) and Cr (up to 640 ppm) contents would require additional sources. These elements could be scavenged from seawater by exhalative particles in a hydrothermal derived plume that finally accumulated on the seafloor. In contrast, high Ni, Co and Mo values could be of hydrothermal origin. Sm-Nd isotopic analyses of feldspar-rich layers yielded an isochron age of 437 +/- 57 Ma (Llandoverian). These results, as well as the fine-grained textures, the lack of evidences of replacement and the predeformational and pre-metamorphic character support the syngenetic origin of the mineralization. Trace-element geochemistry and Sm-Nd isotopes are consistent with a submarine-exhalative origin of the mineralization processes, and suggest that the feldspar-rich levels are metaexhalites. (C) 2004 Elsevier B.V All rights reserved MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0375-6742 UR - ISI:000221004600002 L2 - rare earth elements;geochronology;sedex;exhalites;Catalonian Coastal Ranges;RARE-EARTH ELEMENT; EAST PACIFIC RISE; SILURIAN SEDEX DEPOSITS; METALLIFEROUS SEDIMENTS; SOUTHWESTERN CATALONIA; SULFUR ISOTOPE; COASTAL RANGES; BLACK SHALES; SOUTH CHINA; POBLET AREA SO - Journal of Geochemical Exploration 2004 ;82(1-3):17-33 10355 UI - 6473 AU - Canizares-Macias MP AU - Garcia-Mesa JA AU - de Castro MDL AD - Univ Cordoba, Dept Analyt Chem, E-14071 Cordoba, SpainNatl Autonomous Univ Mexico, Fac Chem, Dept Analyt Chem, Mexico City 04510, DF, MexicoAYCEL, Jaen 23003, Spainde Castro, MDL, Univ Cordoba, Dept Analyt Chem, Annex C-3,Campus Rabanales, E-14071 Cordoba, Spain TI - Determination of the oxidative stability of olive oil, using focused-microwave energy to accelerate the oxidation process AB - A new method is proposed for rapid monitoring of the oxidative stability of virgin olive oil. Samples were irradiated with microwave energy to accelerate the oxidation process and photometric monitoring was performed at 232 and 270 nm. Conditions such as microwave irradiation power, number of irradiation cycles, and irradiation time were optimized by means of multivariate screening that showed that irradiation power is the most significant condition in the oil oxidation process. Twelve samples of extra virgin olive oil of different oxidative stability-between 19 and 130 h calculated from the induction time of the Rancimat method, usual for analysis of olive oil in routine laboratories-were analyzed by the proposed microwave-assisted method, and a decrease in the induction time between 60 and 68% was obtained. The results obtained showed that correlation between the proposed method and the Rancimat method was excellent. The correlation coefficients were 0.9953 and 0.9963 for monitoring at 232 and 270 nm, respectively MH - Mexico|Distrito Federal MH - Spain PB - HEIDELBERG: SPRINGER-VERLAG HEIDELBERG RP - NOT IN FILE U3 - TC 2 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1618-2642 UR - ISI:000188112700034 L2 - focused-microwave energy;oxidative stability;olive oil;ultraviolet photometric monitoring;FLOW-INJECTION; AUTOMATED-DETERMINATION; EDIBLE OILS; PERFORMANCE; FOODS; EXTRACTION; RANCIDITY SO - Analytical and Bioanalytical Chemistry 2004 ;378(2):479-483 10356 UI - 6530 AU - Canizares-Macias MP AU - Garcia-Mesa JA AU - de Castro MDL AD - Univ Cordoba, Dept Analyt Chem, E-14071 Cordoba, SpainNatl Autonomous Univ Mexico, Fac Chem, Dept Analyt Chem, Mexico City 04510, DF, MexicoAYCEL, E-23003 Jaen, Spainde Castro, MDL, Univ Cordoba, Dept Analyt Chem, Annex C-3,Campus Rabanales, E-14071 Cordoba, Spain TI - Fast ultrasound-assisted method for the determination of the oxidative stability of virgin olive oil AB - A method for accelerating the determination of the oxidative stability of virgin olive oil by use of ultrasound energy is proposed. The most influential variables on the acceleration of the process were those characteristic of the ultrasound probe, namely irradiation time, duty cycle and pulse amplitude, and they were exhaustively optimized. The ultrasound device, a cylindrical titanium alloy microprobe (3 mm diameter), was immersed into the olive oil sample contained in a 5 cm long test tube where the ultrasound waves were applied directly. The oxidation process was monitored at 270 nm. Twelve samples of virgin olive oil with known oxidative stability, ranging between 19 and 129 h, calculated by the Rancimat method, were analyzed and the results obtained showed an excellent correlation (r = 0.9961) with those provided by the Rancimat method. The proposed method drastically decreased the time required for the determination of this parameter, e.g. a virgin olive oil with oxidative stability 129 h, as calculated by the Rancimat method, required only 50.5 min, thus decreasing the determination time I 10 times. The method was applied to the determination of the stability of five extra virgin olive oils from different varieties of olive seeds. The values obtained were interpolated in the correlation plot for the calculation of the values corresponding to the Rancimat method. They coincided with those calculated previously with this method, thus demonstrating the validity of the proposed method. (C) 2003 Elsevier B.V All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2670 UR - ISI:000187953100003 L2 - ultrasound energy;olive oil;oxidative stability;UV monitoring;EXTRACTION; ACCELERATION; SEDIMENTS; WINE SO - Analytica Chimica Acta 2004 ;502(2):161-166 10357 UI - 5986 AU - Canizo AI AU - Eyler GN AU - Morales G AU - Cerna JR AD - Univ Nacl Ctr Prov Buenos Aires, Fac Ingn, Lab Quim, Olavarria, ArgentinaCtr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoCanizo, AI, Univ Nacl Ctr Prov Buenos Aires, Fac Ingn, Lab Quim, Avda del Valle 5737,B7400JWI, Olavarria, Argentina TI - Diethyl ketone triperoxide: thermal decomposition reaction in chlorobenzene solution and its application as initiator of polymerization AB - The kinetics of the thermal decomposition reaction of diethyl ketone triperoxide (3,3,6,6,9,9-hexaethyl-1,2,4,5,7,8-hexaoxacyclononane, DEKT) in chlorobenzene solution were studied in the temperature range 99.0-148.0 degreesC and at initial concentrations of (1.65-4.97) x 10(-2) m. The thermolysis of DEKT follows a first-order kinetic law up to at least ca 80% triperoxide conversion. The activation parameter values for the initial O-O bond rupture in chlorobenzene (DeltaH(double dagger) =134.6 +/- 1.7 kJmol(-1); DeltaS(double dagger) =4.2 +/- 3.8 J mol(-1)K(-1)) and the reaction products observed support a stepwise reaction mechanism which includes as a first step the unimolecular homolytic cleavage of one peroxidic bond of the DEKT molecule giving rise to a biradical as intermediate. Additionally, the results obtained were compared with those obtained in toluene, toluene-styrene (50%, v/v) and chlorobenzene-styrene (50%, v/v) solution, showing that the decomposition reaction is strongly solvent dependant. Further, the biradical intermediate obtained in all cases was used to initiate styrene polymerization. It was demonstrated that DEKT can effectively act as initiator in styrene polymerization and its performance is similar to that presented by a multifunctional initiator giving rise to high molecular weight polystyrene at a high reaction rate. Copyright (C) 2004 John Wiley Sons, Ltd MH - Argentina MH - Mexico|Coahuila PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic;Chemistry, Physical U5 - J;Article AV - English IS - 0894-3230 UR - ISI:000220188200008 L2 - cyclic organic peroxide;diethyl ketone triperoxide;hexaoxacyclononane;solution kinetics;multifunctional initiator;cyclic peroxide initiator;styrene polymerization;polystyrene SO - Journal of Physical Organic Chemistry 2004 ;17(3):215-220 10358 UI - 3741 AU - Cano-Barrita PFD AU - Balcom BJ AU - Bremner TW AU - MacMillan MB AU - Langley WS AD - Natl Polytech Int Mexico, CIIDIR Oaxaca, Mexico City, DF, MexicoUniv New Brunswick, Dept Phys, MRI Ctr, Fredericton, NB E3B 5A3, CanadaWS Langley Concrete & Mat Technol Inc, Sackville, NS, CanadaCano-Barrita, PFD, Natl Polytech Int Mexico, CIIDIR Oaxaca, Mexico City, DF, Mexico TI - Moisture distribution in drying ordinary and high performance concrete cured in a simulated hot dry climate AB - Adequate moisture is very important during early age of portland cement concrete. The Single Point Magnetic Resonance Imaging technique was used to study the effects of various lengths of moist curing, and the use of curing compound, on the amount and distribution of evaporable water during drying of ordinary and high performance concrete. The specimens subjected to six different curing regimes, were cast in triplicate for a total of 72. After moist curing at 38degreesC, the specimens were subjected to uniaxial drying in an environmental chamber at 38degreesC and 40% relative humidity that simulated hot dry climate conditions. As the specimens were drying, Magnetic Resonance Imaging was used to study the evaporable water distribution, non-destructively and with millimetric resolution. The Magnetic Resonance Imaging profiles indicated a reduced moisture loss with increasing length of moist curing. Extended moist curing was especially beneficial for the two self-compacting concrete mixtures, particularly for the cover concrete. In all mixtures the use of curing compound was only marginally better than one day moist curing, but was significantly better than air curing, particularly for the cover concrete. The moisture diffusivity was evaluated from the transient moisture distribution profiles using the Boltzmann transformation method. The results indicated a strong dependence of the moisture diffusivity on the moisture content when above 80% saturation, whereas below this value it remains almost constant. The moisture diffusivity is significantly reduced with increased moist curing period MH - Canada MH - Mexico|Distrito Federal PB - BAGNEUX: R I L E M PUBLICATIONS RP - NOT IN FILE U3 - TC 3 U4 - Construction & Building Technology;Engineering, Civil;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1359-5997 UR - ISI:000225447200003 L2 - CEMENT PASTES; SHRINKAGE; WATER; ADMIXTURES; BEHAVIOR SO - Materials and Structures 2004 ;37(272):522-531 10359 UI - 4477 AU - Canseco-Marquez L AU - Smith EN AD - Natl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoUniv Texas, Dept Biol, Arlington, TX 76019, USASmith, EN, Natl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, AP 70-399, Mexico City 04510, DF, Mexico TI - A diminutive species of Eleutherodactylus (Anura : Leptodactylidae), of the Alfredi group, from the Sierra Negra of Puebla, Mexico AB - A new species of frog of the Eleutherodactylus alfredi group is described from the mountains of Zoquitlan, Puebla, Mexico. It is known from a single adult male only 15.8 mm in snout-vent length. The new species is known from an elevation of 2155 in in oak cloud forest. This new species differs most noticeably from other species in the group by its diminutive size and possessing a suprarostral white-colored patch MH - Mexico|Distrito Federal MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000223728500009 L2 - Amphibia;Anura;Eleutherodactylus galacticorhinus new species;Leptodactylidae;Mexico;Puebla;zoquitlan SO - Herpetologica 2004 ;60(3):358-363 10360 UI - 7049 AU - Cantu C AU - Wright RG AU - Scott JM AU - Strand E AD - Univ Nuevo Leon, Coll Forestry, Linares 67700, NL, MexicoUniv Idaho, US Geol Survey, Idaho Cooperat Fish & Wildlife Res Unit, Moscow, ID 83844, USAUniv Idaho, Coll Nat Resources, Moscow, ID 83844, USACantu, C, Univ Nuevo Leon, Coll Forestry, Km 145,Carretera Nacl 85,Apartado Postal 41, Linares 67700, NL, Mexico TI - Assessment of current and proposed nature reserves of Mexico based on their capacity to protect geophysical features and biodiversity AB - Mexico currently has 144 nature reserves covering approximately 9.1% of its land area. These reserves were established for a variety of reasons-often unrelated to the protection of biodiversity. In 2000 in response to a growing concern about the lack of organized conservation reserve planning to protect the important threatened biological and physical features of Mexico, the Mexican Commission for Knowledge and Use of Biodiversity (CONABIO) proposed the establishment of 151 new reserves for Mexico covering 5 1 429,500 ha. We compiled a GIS analysis using digital thematic maps of physical and biological features to examine how the existing and proposed reserves serve to protect the biodiversity and physical features of the country. Using a conservation target of placing a minimum of 12% of the land area of each important biophysical feature in nature reserves, we found that the 144 existing nature reserves covering 18 million ha (9% of the country) only meet that target for elevation ranges > 3000 m and areas with poor soils. These mountainous areas represent less than 12% of the country. The gaps in the existing nature reserves network occur mainly at lower and intermediate elevations ( < 3000 m) areas with xeric, tropical, and temperate ecosystems, and high productivity soils. The areas proposed by CONABIO increase the proportion of protected lands in the country to over 27% and most of the conservation targets for geophysical features, and land cover, categories are met. Whether this area would be sufficient to maintain viable populations and ecological integrity of species and ecosystems is unknown. Even with the new reserves, low elevation coastal lands would be below the conservation target in the nature reserves. To include a representative sample of these lands would be difficult as these are the same areas where the majority of people live. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 13 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000186385300007 L2 - conservation planning;GAP;gap analysis;nature reserves;GAP ANALYSIS; BIOLOGICAL DIVERSITY; CONSERVATION; AREAS; USA SO - Biological Conservation 2004 ;115(3):411-417 10361 UI - 5720 AU - Cantu S AU - Wright RG AU - Scott JM AU - Strand E AD - Univ Nuevo Leon, Coll Forestry, Linares 67700, NL, MexicoUniv Idaho, Idaho Cooperat Fish & Wildlife Res Unit, US Geol Survey, Moscow, ID 83844, USAUniv Idaho, Coll Nat Resources, Moscow, ID 83844, USACantu, S, Univ Nuevo Leon, Coll Forestry, Km 145 Carr A Cd Victoria,Ap Post 41, Linares 67700, NL, Mexico TI - Assessing biodiversity in Nuevo Leon, Mexico: Are nature reserves the answer? AB - The Mexican state of Nuevo Leon, located in the northeastern portion of the country, currently has 26 state and three federal nature reserves covering approximately 4.5% of its land area. These reserves were established for a variety of reasons not necessarily related to conservation purposes. In 2000 in response to a growing concern about the lack of organized conservation reserve planning to protect the important biological and physical features of Mexico, the Mexican Commission for Knowledge and Use of Biodiversity proposed 12 new terrestrial reserves for Nuevo Leon. The new reserves, if established, would increase the proportion of protected lands in the state to almost 24% of the state's land area. We compiled a Geographic Information System (GIS) analysis using digital thematic maps of physical and ecological features to examine how well the existing and proposed reserves incorporated the major biological and physical features of the state. The existing reserves are located primarily in regions with elevations > 1,000-1,500 m, on less productive soils, and are dominated by pine and oak forest cover types. As a result, the state's dominant biotic region - low elevation coastal plain with xeric scrub vegetation - is disproportionately under represented in the current reserve system. The new reserves would expand the protection of biophysical resources throughout the state. However, the inclusion of important resources in the low elevation coastal lands would still be limited MH - Mexico|Nuevo Leon MH - USA PB - ROCKFORD: NATURAL AREAS ASSOCIATION RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Forestry U5 - J;Article AV - English IS - 0885-8608 UR - ISI:000220724600010 L2 - conservation planning;GAP;gap analysis;nature reserves;GAP ANALYSIS; VEGETATION; AREAS; USA SO - Natural Areas Journal 2004 ;24(2):150-153 10362 UI - 5526 AU - Capaccioni B AU - Taran Y AU - Tassi F AU - Vaselli O AU - Mangani G AU - Macias JL AD - Univ Urbino, Inst Volcanol & Geochem, I-61029 Urbino, ItalyUNAM, Inst Geophys, Mexico City 04510, DF, MexicoUniv Florence, Dept Earth Sci, I-50121 Florence, ItalyCNR, Unit Florence, Inst Geosci & Earth Resources, I-50121 Florence, ItalyUniv Urbino, Inst Chem Sci, I-60129 Urbino, ItalyCapaccioni, B, Univ Urbino, Inst Volcanol & Geochem, Loc Crocicchia, I-61029 Urbino, Italy TI - Source conditions and degradation processes of light hydrocarbons in volcanic gases: an example from El Chichon volcano (Chiapas State, Mexico) AB - Since the 1982 plinian eruption, El Chichon volcano (Chiapas State, Mexico) has exhibited intense hydrothermal activity. Fumaroles, bubbling gases, hot springs, and acid water pools discharge at both the crater floor and the volcano flanks. Sixteen different hydrocarbon species were identified in famaroles and bubbling gases, including alkanes, alkenes, and aromatic hydrocarbons. Among the possible reactions, dehydrogenation involving light alkenes and alkanes pairs (C-2 UP to linear C-4) approaches metastable equilibria when redox state is controlled by the rock mineral assemblage. Reequilibration conditions of the C-3 and n-C-4 alkanes with their unsaturated counterparts appear to be established at temperature and redox conditions, similar to those of CH4/CO2 pair. Conversely, C-2 and branched C-4 alkene/alkane ratios, although controlled by a similar rock redox buffer system, appear to reflect equilibrium at different temperature and/or redox conditions, probably due to the slow kinetics of the reactions involved. Therefore, a full chemical equilibrium simultaneously involving CH4 and heavier hydrocarbons is not attained. Thermodynamic evaluation indicates that cracking reactions involving the C-C bond breakage do not achieve a thermodynamic equilibrium. However, their relative distribution appears to be consistent with a thermal-rather than a biological-origin. Catalytic processes are also invoked in the production of benzene, whose distribution appears to be related to the measured H-2 concentration, other than to possible nonoxidative and oxidative conversion of methane. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000221368800006 L2 - degradation;light hydrocarbons;El Chichon volcano;THERMODYNAMIC PROPERTIES; HYDROTHERMAL SYSTEMS; CHEMICAL-EQUILIBRIUM; ISOTOPIC COMPOSITION; SPRING DISCHARGES; FUMAROLIC GASES; MAGMATIC GASES; 1982 ERUPTIONS; NATURAL-GAS; TEMPERATURE SO - Chemical Geology 2004 ;206(1-2):81-96 10363 UI - 3634 AU - Capovilla R AU - Guven J AU - Rojas E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoDublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, IrelandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Veracruzana, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, MexicoCapovilla, R, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Hamiltonian dynamics of extended objects AB - We consider relativistic extended objects described by a reparametrization-invariant local action that depends on the extrinsic curvature of the world-volume swept out by the object as it evolves. We provide a Hamiltonian formulation of the dynamics of such higher derivative models which is motivated by the ADM formulation of general relativity. The canonical momenta are identified by looking at boundary behaviour under small deformations of the action; the relationship between the momentum conjugate to the:embedding functions and the conserved momentum density is established: The canonical Hamiltonian is constructed explicitly; the constraints on the phase space, both primary and secondary, are identified and the role they play in the theory is described. The multipliers implementing the primary constraints are identified in terms of the ADM lapse and shift variables and Hamilton's equations are shown to be consistent with the Euler-Lagrange equations MH - Ireland MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000225806700017 L2 - GENERAL-RELATIVITY; FIELD-THEORIES; STRINGS; MEMBRANES; RIGIDITY; MODEL; FORMALISM; GEOMETRY SO - Classical and Quantum Gravity 2004 ;21(23):5563-5585 10364 UI - 4984 AU - Capovilla R AU - Guven J AD - Inst Politecn Nacl, Dept Fis, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoDublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, IrelandNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCapovilla, R, Inst Politecn Nacl, Dept Fis, Ctr Invest & Estudios Avanzados, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Second variation of the Helfrich-Canham Hamiltonian and reparametrization invariance AB - A covariant approach towards a theory of deformations is developed to examine both the first and second variation of the Helfrich-Canham Hamiltonian-quadratic in extrinsic curvature-which describes fluid vesicles at mesoscopic scales. Deformations are decomposed into tangential and normal components. At first order, tangential deformations may always be identified with a reparametrization; at second order, they differ. The relationship between tangential deformations and reparametrizations, as well as the coupling between tangential and normal deformations, is examined at this order for both the metric and the extrinsic curvature tensors. Expressions for the expansion to second order in deformations of geometrical invariants constructed with these tensors are obtained; in particular, the expansion of the Hamiltonian to this order about an equilibrium is considered. Our approach applies as well to any geometrical model for membranes MH - Ireland MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000222543300003 L2 - FLUID MEMBRANES; SHAPE TRANSFORMATIONS; LIPID-MEMBRANES; VESICLES; HYDRODYNAMICS; BILAYERS; ENERGY; CELL SO - Journal of Physics A-Mathematical and General 2004 ;37(23):5983-6001 10365 UI - 6040 AU - Capra L AU - Poblete MA AU - Alvarado R AD - Univ Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoUniv Oviedo, Dept Geog, Oviedo 33011, Asturias, SpainCapra, L, Univ Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, Mexico TI - The 1997 and 2001 lahars of Popocatepetl volcano (Central Mexico): textural and sedimentological constraints on their origin and hazards AB - Popocatepetl volcano is the most active volcano in central Mexico, and represents a high risk for more than 40 million people, including Mexico City. In 1994, volcanic activity at Popocatepetl renewed with the formation of ash-rich plumes up to 7 km high. In April 1996, lava emissions filled the crater and were accompanied by a series of explosions that produced eruptive columns up to 8 kin high. Associated with explosive events in 1997 and 2001, two major lahars events occurred, leaving debris flow deposits along Huiloac Gorge for as far as 15 km, to the town of Santiago Xalitzinta. The 1997 debris flow deposit originated after a prolonged emission of ash which caused glacier melt and a rapid release of water (1 x 10(7) m(3)). The amount of melting water was sufficient to gradually erode the river bed causing a flood that gradually transformed from a debris flow to a hyperconcentrated flow. In contrast, the 2001 debris flow that originated from a post-depositional remobilization of a pumice flow deposit, did not experience any flow transformation and carried 25% water at maximum. The different behavior of these two lahars has important hazard implications. Both lahars reached Xalitzintla town, but at that point, the 1997 lahar had already transformed into a sediment-loaded stream flow. The 2001 lahar, by contrast, maintained the characteristics of a debris flow, being more competent, and with greater destructive power. What happened with these lahars demonstrates how important it is to take into consideration secondary volcanic phenomena. Even though they were not large flows, they were capable of threatening populated areas, even during periods of volcanic quiescence or reduced magmatic activity. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000220026500008 L2 - lahar;debris flow;hyperconcentrated flow;Popocatepetl;Mexico;DEBRIS-FLOW; MAYON VOLCANO; DEPOSITS; PHILIPPINES; WASHINGTON; EVOLUTION SO - Journal of Volcanology and Geothermal Research 2004 ;131(3-4):351-369 10366 UI - 3871 AU - Carbajal N AU - Pohlmann T AD - Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78231, MexicoUniv Hamburg, Inst Oceanog, D-2529 Hamburg, GermanyCarbajal, N, Inst Potosino Invest Cient & Tecnol, Apartado Postal 3-74, San Luis Potosi 78231, Mexico TI - Comparison between measured and calculated tidal ellipses in the German Bight AB - Using a three-dimensional non-linear shelf model, the elliptical properties (ellipticity, inclination of the ellipse, major and minor semi-axis and phase) of the M-2 tide in the German Bight were calculated and compared with CODAR measurements. A series of barotropic and baroclinic calculations were carried out to investigate the influence of geometry, stratification and particularly inputs of freshwater on these parameters. The elliptical properties undergo stronger changes in zones of influence of embayments and in the deepening of the old Elbe Valley. Friction effects in the shallow areas are responsible for robust vertical variations of the ellipticity. The island of Helgoland induces wakes on its western and eastern sides. The discharge of freshwater of the rivers Elbe, Weser and Ems induced in general negative ellipticity. Although primarily determined by geography, baroclinic effects significantly modified the inclination of the ellipses. The calculated ellipses pattern of anticlockwise and clockwise tidal current rotation agrees quite well with CODAR measurements. The elliptical properties give a general idea of the interaction of tidal waves with coastal geometries MH - Germany MH - Mexico|San Luis Potosi PB - HEIDELBERG: SPRINGER HEIDELBERG RP - NOT IN FILE U3 - TC 0 U4 - Oceanography U5 - J;Article AV - English IS - 1616-7341 UR - ISI:000225093000005 L2 - tides;numerical modeling;German Bight;ellipticity;CODAR measurements;NORTH-SEA; TAYLORS PROBLEM; RHINE ROFI; STRATIFICATION; CURRENTS; MODEL; SHELF; CIRCULATION; BOTTOM SO - Ocean Dynamics 2004 ;54(5):520-530 10367 UI - 3832 AU - Carballo JM AU - Fernandez DJ AU - Negro J AU - Nieto LM AD - Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoInst Politecn Nacl, ESIA, Mexico City 07738, DF, MexicoCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Valladolid, Dept Fis Teor, Valladolid 47005, SpainCarballo, JM, Inst Politecn Nacl, ESFM, UP Adolfo Lopez Mateos, Mexico City 07738, DF, Mexico TI - Polynomial Heisenberg algebras AB - Polynomial deformations of the Heisenberg algebra are studied in detail. Some of their natural realizations are given by the higher order susy partners (and not only by those of first order, as is already known) of the harmonic oscillator for even-order polynomials. Here, it is shown that the susy partners of the radial oscillator play a similar role when the order of the polynomial is odd. Moreover, it will be proved that the general systems ruled by such kinds of algebras, in the quadratic and cubic cases, involve Painleve transcendents of types IV and V, respectively MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000225151100023 L2 - ISOSPECTRAL OSCILLATOR HAMILTONIANS; SHAPE INVARIANT POTENTIALS; HYDROGEN-LIKE POTENTIALS; COHERENT STATES; QUANTUM-MECHANICS; DERIVATIVE SUPERSYMMETRY; FACTORIZATION METHOD; HARMONIC-OSCILLATOR; PAINLEVE EQUATIONS; NONLINEAR ALGEBRAS SO - Journal of Physics A-Mathematical and General 2004 ;37(43):10349-10362 10368 UI - 4456 AU - Cardenas-Trivino G AU - Segura RA AU - Reyes-Gasga J AD - Concepcion Univ, Fac Ciencias Quim, Dept Polimeros, Lab Atomos Met, Concepcion, ChileUniv Nacl Autonoma Mexico, Inst Fis, Dept Fis Mat Condensada, Lab HRTEM, Mexico City 01000, DF, MexicoCardenas-Trivino, G, Concepcion Univ, Fac Ciencias Quim, Dept Polimeros, Lab Atomos Met, Casilla 160-C, Concepcion, Chile TI - Palladium nanoparticles from solvated atoms - stability and HRTEM characterization AB - Palladium particles of nanometric dimensions were synthesized by the chemical liquid deposition method in which the Pd atoms were co-deposited at 77 K with 2-propanol, acetone, and tetrahydrofurane vapor to obtain colloidal dispersions. The colloidal dispersions were characterized by UV-visible spectrophotometry, transmission electron microscopy (TEM) and high-resolution TEM (HRTEM). The palladium colloids synthesized by use of these solvents are very stable. A strong absorption band in the UV region suggests that quantum confinement occurs in the nanoparticles obtained by this procedure. Studies of TEM micrographs reveal average size distributions between 1 and 5 nm for all Pd colloids. Whereas particle sizes in Pd-2-propanol colloids are not very sensitive to concentration change, the particle-size average in Pd-acetone and Pd-THF increases by 0.5 nm when the concentration increases from 10(-3) to 10(-2) mol l(-1). The HRTEM results show the high crystallinity of Pd nanoparticles and three low-energy structure shapes were found: cuboctahedron, tetrakaidecahedron, and icosahedron MH - Chile MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000223957200004 L2 - Pd nanoparticles;nanostructures;metal colloids;colloid stability;HRTEM;NONAQUEOUS SOLVENTS; COLLOIDAL PALLADIUM; BIMETALLIC COLLOIDS; METAL-CLUSTERS; ORGANIC MEDIA; PARTICLES; FILMS; GOLD SO - Colloid and Polymer Science 2004 ;282(11):1206-1212 10369 UI - 4992 AU - Cardenas G AU - Cabrera G AU - Taboada E AU - Miranda SP AD - Concepcion Univ, Dept Polimeros, Fac Ciencias Quim, Concepcion, ChileUniv Nacl Autonoma Mexico, Fac Estudios Super, Izcalli, MexicoCardenas, G, Concepcion Univ, Dept Polimeros, Fac Ciencias Quim, Edmundo Larenas 129, Concepcion, Chile TI - Chitin characterization by SEM, FTIR, XRD, and C-13 cross polarization/mass angle spinning NMR AB - The full characterization of chitin obtained from squid, shrimp, prawn, lobsters, and king crab is reported. Elemental analysis, including metals such as Ca, Mg, Zn, Cd, Hg, Cr, Mn, Cu, and Pb, was performed, which is quite relevant because the skeleton composition is slightly different for each species. The morphology was studied by means of TEM and their compositions were determined by energy-dispersive X-ray analysis. C-13 cross polarization/magic angle spinning NMR was applied to determine the chemical shift of all the carbons and the difference between them. Chitin was isolated by using chemical methods, alternating hydrochloric acid and sodium hydroxide. The alpha-chitin from shrimp, prawn, lobsters, and king crabs showed two signals at 73.7 and 75.6 ppm. Meanwhile, the beta-chitin from squid exhibited one signal at 75.2 ppm. FTIR studies were used to analyze a-chitin from shrimp and beta-chitin from squid. The a-chitin exhibited amide I vibration modes at 1660 and 1627 cm(-1), whereas the beta-chitin showed one band at 1656 cm(-1). X-ray diffraction showed that alpha-chitin is orthorhombic (a = 4.74 Angstrom, b = 18.86 Angstrom, and c 10.32 Angstrom) and beta-chitin had a monoclinic dihydrated form (a = 4.80 Angstrom, b = 10.40 Angstrom, c = 11.10 Angstrom, and beta = 97). (C) 2004 Wiley Periodicals, Inc MH - Chile MH - Mexico|Estado De Mexico PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000222481500050 L2 - alpha- and beta-chitin;C-13 CP/MAS NMR;FTIR;morphology;polysaccharides SO - Journal of Applied Polymer Science 2004 ;93(4):1876-1885 10370 UI - 3961 AU - Cardoso RS AU - Defeo O AD - IPN, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoUNDECIMAR, Fac Ciencias, Montevideo 14000, UruguayUniv Fed Rio de Janeiro, Dept Ciencias Nat, Lab Ecol Marinha, BR-22290240 Rio De Janeiro, BrazilDefeo, O, IPN, Ctr Invest & Estudios Avanzados, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Biogeographic patterns in life history traits of the Pan-American sandy beach isopod Excirolana braziliensis AB - Biogeographic patterns in life history traits of the Pan-American sandy beach isopod Excirolana braziliensis were analyzed to determine latitudinal variations along its distribution, from tropical (9degreesN) to temperate (39degreesS) sandy beaches in Atlantic and Pacific oceans. Population features exhibited systematic geographical patterns of variation: (1) an increase in individual sizes and growth rates towards temperate beaches, following an inverse relationship with mean water temperature of the surf zone; (2) a shift from almost continuous to seasonal growth from subtropical to temperate Atlantic beaches and a positive relationship between amplitude of intra-annual growth oscillations and temperature range; (3) a linear decrease in life span and an increase in natural mortality from temperate to subtropical beaches; and (4) an increase in the individual mass-at-size (length-mass relationship) from subtropical to temperate beaches. Analyses discriminated by sex were consistent with the patterns illustrated above. Local effects of temperature and beach morphodynamics are discussed. Our results demonstrate that the population dynamics of E. braziliensis is highly plastic over latitudinal gradients, with large-scale variations in temperature and concurrent environmental variables leading to an adjustment of the phenotype-environment relationship. (C) 2004 Elsevier Ltd. All rights reserved MH - Brazil MH - Mexico|Yucatan MH - Uruguay PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000224867900015 L2 - cirolanid isopods;Excirolana braziliensis;macroecology;population dynamics;sandy beaches;America;CRAB EMERITA-BRASILIENSIS; RIO-DE-JANEIRO; SOUTHERN CHILE; CONTRASTING MORPHODYNAMICS; MORPHOLOGICAL DIVERGENCE; POPULATION-DYNAMICS; COMMUNITY STRUCTURE; TEMPORAL VARIATION; CRUSTACEA-ISOPODA; EURYDICE-PULCHRA SO - Estuarine Coastal and Shelf Science 2004 ;61(3):559-568 10371 UI - 5202 AU - Carels N AU - Vidal R AU - Mansilla R AU - Frias D AD - Univ Estadual Santa Cruz, Lab Bioinformat, Ilheus, Bahia, BrazilUniv Nacl Autonoma Mexico, Ctr Invest Interdisciplinarias Ciencias & Humanid, Mexico City 04510, DF, MexicoCarels, N, Univ Estadual Santa Cruz, Lab Bioinformat, Rodovia Ilheus Itabuna Km 16, Ilheus, Bahia, Brazil TI - The mutual information theory for the certification of rice coding sequences AB - We report here the use of the mutual information theory for the certification of annotated rice coding sequences of both GenBank and TIGR databases. Considering coding sequences larger than 600 bp, we successfully screened out genes with aberrant compositional features. We found that they represent about 10% of both datasets after cleaning for gene redundancy. Most of the rejected accessions showed a different trend in GC3% vs GC2% plot compared to the set of accessions that have been published in international journals. This suggests the existence of a bias in the pattern recognition algorithms used by gene prediction programs. (C) 2004 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000222205200030 L2 - rice;AMI;GenBank;TIGR;bimodality;GENE IDENTIFICATION; DNA-SEQUENCES; PREDICTION; REGIONS SO - Febs Letters 2004 ;568(1-3):155-158 10372 UI - 3337 AU - Carigi L AU - Pettini M AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Astron, Cambridge CB3 0HA, EnglandCarigi, L, Natl Autonomous Univ Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - The effects of stellar yields with rotation on chemical evolution models AB - We summarise the results of recent work investigating the effects of stellar yields which take into account rotation on the predictions of chemical evolution models for early populations of galaxies MH - United Kingdom MH - Mexico|Distrito Federal PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article AV - English IS - 0074-1809 UR - ISI:000226161500118 SO - Stellar Rotation 2004 ;(215):589-590 10373 UI - 4178 AU - Carlsson J AU - McDowell JR AU - az-Jaimes P AU - Carlsson JEL AU - Boles SB AU - Gold JR AU - Graves JE AD - Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Gloucester Point, VA 23062, USAUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoTexas A&M Univ, Dept Wildlife & Fisheries, Ctr Biosystemat & Biodivers, College Stn, TX 77843, USACarlsson, J, Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Rt 1208,Greate Rd, Gloucester Point, VA 23062 USA TI - Microsatellite and mitochondrial DNA analyses of Atlantic bluefin tuna (Thunnus thynnus thynnus) population structure in the Mediterranean Sea AB - Genetic variation was surveyed at nine microsatellite loci and the mitochondrial control region (868 bp) to test for the presence of genetic stock structure in young-of-the-year Atlantic bluefin tuna (Thunnus thynnus thynnus) from the Mediterranean Sea. Bluefin tuna were sampled over a period of 5 years from the Balearic and Tyrrhenian seas in the western basin of the Mediterranean Sea, and from the southern Ionian Sea in the eastern basin of the Mediterranean Sea. Analyses of multilocus microsatellite genotypes and mitochondrial control region sequences revealed no significant heterogeneity among collections taken from the same location in different years; however, significant spatial genetic heterogeneity was observed across all samples for both microsatellite markers and mitochondrial control region sequences (F-ST = 0.0023, P = 0.038 and Phi(ST) = 0.0233, P = 0.000, respectively). Significant genetic differentiation between the Tyrrhenian and Ionian collections was found for both microsatellite and mitochondrial markers (F-ST = 0.0087, P = 0.015 and Phi(ST) = 0.0367, P = 0.030, respectively). These results suggest the possibility of a genetically discrete population in the eastern basin of the Mediterranean Sea MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000224524000008 L2 - D-loop;highly migratory;microsatellites;population genetic;spawning area;teleost;STATISTICAL TESTS; XIPHIAS-GLADIUS; CONTROL REGION; GENUS THUNNUS; WESTERN; POLYMORPHISM; ALLOZYME; EASTERN; NUCLEAR; LOCI SO - Molecular Ecology 2004 ;13(11):3345-3356 10374 UI - 4690 AU - Carlyle-Moses DE AU - Laureano JSF AU - Price AG AD - Univ Toronto, Dept Geog, Grad Program Geog, Toronto, ON M5S 3G3, CanadaCBTA, DGETA, Linares 67880, NL, MexicoUniv Toronto, Div Phys & Environm Sci, Scarborough, ON M1C 1A4, CanadaCarlyle-Moses, DE, Univ Toronto, Dept Geog, 3359 Mississauga Rd, Mississauga, ON L5L 1C6, Canada TI - Throughfall and throughfall spatial variability in Madrean oak forest communities of northeastern Mexico AB - Point throughfall data were generated in two representative red oak stands of a small Madrean watershed in northeastern Mexico during the 2000 and the 2001 wet seasons. Cumulative gross precipitation for 18 selected events was 392.9 turn, while the mean cumulative point throughfall flux from 38-fixed gauges was 331.0 +/- 9.0 mm (84.2 +/- 2.3%). The influence of canopy and understory cover fraction, vegetation area index (VAI), distance to nearest tree bole, as well as the basal area and height of that tree may have on point throughfall depth were evaluated. No significant (alpha = 0.05) relationship between point throughfall and these stand characteristics could be established for gross precipitation inputs > 5 mm. However, excluding events in which occult precipitation was thought to contribute to throughfall generation, the spatial distribution of throughfall was found to be a function of at least one of these factors during each of the gross precipitation inputs < 5 mm. For gross precipitation events > 5 mm point throughfall for all but one event did not significantly deviate from the normal distribution, suggesting that stand-scale throughfall fluxes associated with these relatively larger events may be estimated from a random array of gauges. An average of 9 (range = 3-14) and 34 (range = 11-54) gauges would have been required to estimate mean event throughfall input to the red oak forest floor to within +/-10 and +/-5% at the 95% confidence level, respectively, for gross precipitation events > 5 mm. (C) 2004 Published by Elsevier B.V MH - Canada MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Civil;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0022-1694 UR - ISI:000223292300008 L2 - throughfall;canopy interception loss;Sierra Madre Oriental;forest hydrology;INTERCEPTION LOSS; RAINFALL INTERCEPTION; STEMFLOW CHEMISTRY; DECIDUOUS FOREST; HARDWOOD FOREST; CANOPY; FLUXES; STAND; PINE; PRECIPITATION SO - Journal of Hydrology 2004 ;297(1-4):124-135 10375 UI - 3550 AU - Carranza J AU - Grove H AU - Sletten J AU - Lloret F AU - Julve M AU - Kruger PE AU - Eller C AU - Rillema DP AD - Wichita State Univ, Dept Chem, Wichita, KS 67260, USAUniv Valencia, Fac Quim, Dept Quim Inorgan, E-46100 Burjassot, Valencia, SpainUniv Zacatecas, Fac Ciencias Quim, Zacatecas 98000, MexicoUniv Bergen, Dept Chem, N-5007 Bergen, NorwayUniv Dublin Trinity Coll, Dept Chem, Dublin 2, IrelandSletten, J, Wichita State Univ, Dept Chem, Wichita, KS 67260, USA TI - Synthesis, X-ray crystal structure and magnetic properties of oxalato-bridged copper(II) complexes with 2,3-bis(2-pyridyl)pyrazine, 2,3-bis(2-pyridyl)quinoxaline and 2,2 '-bipyrazine as peripheral ligands AB - Five oxalate-containing copper(ii) complexes of formula [Cu(dpq)(H2O)(ox)].5H(2)O (1), [Cu(dpp)(H2O)(ox)].H2O (2), [Cu(bpz)(ox)](n) (3), [Cu-2(dpp)(2)(H2O)(2)(NO3)(2)(ox)].4H(2)O (4) and [Cu2Cl2(bpz)(2)(H2O)(2)(ox)][Cu(bpz)(H2O)(2)(ox)].2H(2)O (5) [dpq = 2,3-bis(2-pyridyl)quinoxaline; dpp = 2,3-bis(2-pyridyl)-pyrazine; bpz = 2,2'-bipyrazine; ox = oxalate] were prepared and their structures were determined by X-ray diffraction on single crystals. Complexes 1 and 2 are discrete mononuclear complexes with oxalate and dpq (1)/dpp (2) acting as bidentate ligands. Complex 3 is a neutral oxalato-bridged (2,2'-bipyrazine) copper (it) chain where the oxalate adopts a bidentate/monodentate coordination mode, whereas 4 is an oxalato-bridged copper(II) dinuclear complex with ox and dpp acting as bis-bidentate and bidentate ligands, respectively. The structure of 5 contains neutral [Cu(bpz)(H2O)(2)(ox)] (mononuclear) and [Cu-2(bpz)(2)(H2O)(2)Cl-2(ox)] (dinuclear) units where the bpz acts as a bidentate ligand and the oxalate group adopts the bidentate (mononuclear) and bis-bidentate (dinuclear) coordination modes. The copper atoms have distorted square pyramidal (1 and 2) and elongated octahedral (3-5) geometries: two nitrogen atoms from heterocyclic N-donors and two oxalate-oxygen atoms occupy the equatorial positions (1-5) and a water molecule (1 and 2), two oxalate-oxygen atoms (3), a water molecule and a nitrate-oxygen (4), and either two water molecules (5), mononuclear) or a chlorine atom and a water molecule (5, dinuclear) fill the axial ones. Magnetic susceptibility measurements for 3-5 in the temperature range 1.9-290 K reveal the occurrence of weak (J = -1.4 cm(-1), 3) and strong (-312 and -345 cm(-1) for 4 and 5, respectively; H = -J.S-A.S-B) antiferromagnetic interactions between the copper(II) atoms in agreement with the out-of-plane (3) and in-plane (4 and 5) exchange pathways involved. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) MH - Ireland MH - Mexico|Zacatecas MH - Norway MH - Spain MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 1434-1948 UR - ISI:000225995200016 L2 - copper;magnetic properties;N ligands;oxalate;ONE SINGLE-CRYSTAL; DINUCLEAR COMPLEXES; MOLECULAR-STRUCTURE; ALPHAOMEGA-DICARBOXYLATES; CHEMICAL-CHARACTERIZATION; ANISOTROPIC EXCHANGE; COORDINATION POLYMER; POLYPYRIDYL LIGANDS; BINUCLEAR COMPLEXES; DIMETHYL-SULFOXIDE SO - European Journal of Inorganic Chemistry 2004 ;(24):4836-4848 10376 UI - 3908 AU - Carranza J AU - Sletten J AU - Brennan C AU - Lloret F AU - Cano J AU - Julve M AD - Univ Bergen, Dept Chem, N-5007 Bergen, NorwayUniv Valencia, Fac Quim, Inst Ciencia Mol, Dept Quim Inorgan, E-46100 Valencia, SpainUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98000, MexicoSletten, J, Univ Bergen, Dept Chem, Allegaten 41, N-5007 Bergen, Norway TI - Mono-, di- and trinuclear 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz)-containing copper(II) complexes: syntheses, crystal structures and magnetic properties AB - Three new copper(II) complexes of formula [Cu(tppz) (NCO)(2)] . 0.4H(2)O(1), [Cu-2(tppz) Br-4] (2) and [Cu-3(tppz) (C5O5)(3)(H2O)(3)] . 7H(2)O(3) [tppz = 2,3,5,6-tetrakis(2-pyridyl) pyrazine; C5O52- = croconate, dianion of 4,5-dihydroxycyclopent-4-ene-1,2,3-trione] have been synthesised and structurally characterized by X-ray diffraction methods. The structure of complex 1 is made up of neutral [Cu(tppz) (NCO)(2)] mononuclear units and uncoordinated water molecules. The mononuclear units are grouped by pairs to give a rather short copper copper distance of 3.9244(4) Angstrom. The structure of complex 2 consists of neutral tppz-bridged [Cu-2(tppz)Br-4] dinuclear units, the copper copper separation across tppz being 6. 6198(1) Angstrom. The dinuclear units are further connected through weak, double out-of-plane Cu-Br ... Cu bridges [Br( 1) ... Cu(1a) 4.0028(17) Angstrom] creating tetranuclear entities, the copper copper separation through this interaction being 4.3299(21) Angstrom. The structure of complex 3 is built of neutral [Cu-3(tppz) (C5O5)(3)(H2O)(3)] trinuclear units and uncoordinated water molecules. Tppz and one of the croconate groups act as bridging ligands, the former exhibiting the bis-terdentate coordination mode and the latter adopting an unusual asymmetrical bis-bidentate bridging mode through three adjacent oxygen atoms. The other two croconate groups exhibit the bidentate coordination mode. The intramolecular copper copper separations are 6. 5417( 9) ( across tppz) and 4.3234(9) Angstrom (through bis-bidentate croconato). The magnetic properties of 2 and 3 have been investigated in the temperature range 1.9-300 K. The magnetic behaviour of complex 2 is that of an antiferromagnetically coupled copper(II) dimer (J = -40.9 cm(-1), the Hamiltonian being (H) over cap = -J (S) over cap (A).(S) over cap (B)). In the case of compound 3, the chi(M) T vs. T plot is typical of an overall antiferromagnetic coupling with a low-lying spin doublet being fully populated at T < 10 K. The values of the intramolecular antiferromagnetic interactions in 3 are -19.9 (across tppz) and -32.9 cm(-1) ( through bridging croconato). Density functional type calculations were performed on model dinuclear fragments of 3 in order to analyze the efficiency of the exchange pathways involved and also to substantiate the coupling parameters MH - Mexico|Zacatecas MH - Norway MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Review AV - English IS - 1477-9226 UR - ISI:000225220600011 L2 - TRANSITION-METAL-COMPLEXES; BRIDGING LIGAND 2,3,5,6-TETRAKIS(2-PYRIDYL)PYRAZINE; STATE COORDINATION CHEMISTRY; GAUSSIAN-BASIS SETS; 2,3,5,6-TETRA(2-PYRIDYL)PYRAZINE TPPZ; 2,3-BIS(2-PYRIDYL)PYRAZINE DPP; RUTHENIUM(II) COMPLEXES; MOLECULAR-STRUCTURE; SPECTROELECTROCHEMICAL PROPERTIES; ELECTROCHEMICAL PROPERTIES SO - Dalton Transactions 2004 ;(23):3997-4005 10377 UI - 4701 AU - Carranza J AU - Sletten J AU - Lloret F AU - Julve M AD - Univ Bergen, Dept Chem, N-5007 Bergen, NorwayUniv Valencia, Fac Quim, Dept Quim Inorgan, Inst Ciencia Mol, E-46100 Burjassot, Valencia, SpainUniv Zacatecas, Fac Ciencias Quim, Zacatecas 98000, MexicoSletten, J, Univ Bergen, Dept Chem, Alle Gaten 41, N-5007 Bergen, Norway TI - Structural analysis and magnetic properties of the copper(II) dicyanamide complexes [Cu-2(dmphen)(2)(dca)(4)], [Cu(dmphen)(dca)(NO3)](n) and [Cu(4,4 '-dmbpy)(H2O)(dca)(2)] (dca = dicyanamide; dmphen=2,9-dimethyl-1,10-phenanthroline; 4,4 '-dmbpy=4,4 '-dimethyl-2,2 '-bipyridine) AB - The preparation, crystal structures and magnetic properties of three copper(H) compounds of formulae [Cu-2(dmphen)(2)(dca)(4)] (1), [Cu(dmphen)(dca)(NO3)], (2) and [Cu(4,4'-dmbpy)(H2O)(dca)(2)] (3) (dmphen=2,9-dimethyl-1,10-phenanthroline, dca=dicyanamide and 4,4'-dmbpy = 4,4'-dimethyl-2,2'-bipyridine) are reported. The structure of I consists of discrete copper(II) dinuclear units with double end-to-end dca bridges whereas that of 2 is made up of neutral uniform copper(II) chains with a single symmetrical end-to-end dca bridge. Each copper atom in 1 and 2 is in a distorted square pyramidal environment: two (1) or one (2) nitrile-nitrogen atoms from bridging dca groups, one of the nitrogen atoms of the dmphen molecule (1 and 2) and either one nitrile-nitrogen from a terminal dca ligand (1) or a nitrate-oxygen atom (2) build the equatorial plane whereas the second nitrogen atom of the heterocyclic dmphen fills the axial position (1 and 2). The copper-copper separations through double (1) and single (2) end-to-end dca bridges are 7.1337(7) (1) and 7.6617(7) (2). Compound 3 is a mononuclear copper(H) complex whose structure contains two neutral and crystallographically independent [Cu(4,4'-dmbpy)(H2O)(dca)(2)] molecules which are packed in two different layer arrangements running parallel to the bc-plane and alternating along the a-axis. The copper atoms in both molecules have slightly distorted square pyramidal surroundings with the two nitrogen atoms of the 4,4'-dmbpy ligand and two dca nitrile-nitrogen atoms in the basal plane and a water oxygen in the apical position. A semi co-ordinated dca nitrile-nitrogen from a neighbour unit [2.952(6) Angstrom for Cu(2)-N] is in trans position to the apical water molecule in one of the two molecules, this feature representing part of the difference in supramolecular connections in the alternating layers referred to above. Magnetic susceptibility measurements for 1-3 in the temperature range 1.9-290 K reveal the occurrence of weak antiferromagnetic interactions through double [J = -3.3 cm(-1) (1), H = -J (S) over cap (1) (.) (S) over cap (2)] and single [J = -0.57 cm(-1) (2), (H) over cap = -JSigma(i=1) (S) over cap (i+1)] dca bridges and across intermolecular contacts [theta = -0.07 K (3)]. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Zacatecas MH - Norway MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000223311700022 L2 - copper(II) complexes;dicyanamide complexes;crystal structures;magnetic properties;bidentate nitrogen ligand complexes;TO-END DICYANAMIDE; LOW-DIMENSIONAL COMPOUNDS; X-RAY-STRUCTURE; CRYSTAL-STRUCTURES; COORDINATION POLYMERS; BRIDGING DICYANAMIDE; METAL PSEUDOHALIDES; CATION TEMPLATION; EXTENDED NETWORKS; 3D COMPOUNDS SO - Inorganica Chimica Acta 2004 ;357(11):3304-3316 10378 UI - 6518 AU - Carrasco-Ochoa JA AU - Ruiz-Shulcloper JR AD - Natl Inst Astrophys Opt & Elect, Puebla 72840, MexicoIPN, Ctr Res Comp, Mexico City, DF, MexicoUniv Tennessee, IRIS Lab, Dept Elect & Comp Engn, Knoxville, TN 37996, USACarrasco-Ochoa, JA, Natl Inst Astrophys Opt & Elect, Calle Luis Enr Erro 1,Sta Maria Tonantzintla, Puebla 72840, Mexico TI - Sensitivity analysis of fuzzy Goldman typical testors AB - In the framework of supervised classification problems, the estimation of feature relevance and the search of all discriminating sub-descriptions of objects have great practical significance. Solving this problem in real situations is not always an easy task, because of the computational cost. The problems due to the size of matrix representation of objects, the computational complexity of algorithms, the non-standard object descriptions like mixed incomplete, which appear very frequently in Soft Sciences, and also the presence of fuzzy characteristics in the class descriptions or in the similarity measure used in the modeling of the problem in question have a big influence on the computational cost. Here, real valued similarity measures between feature values will be considered. Fuzzy Goldman typical testors are useful for estimating feature relevance and for searching all discriminate sub-descriptions of objects, but the computational complexity of algorithms to compute all Fuzzy Goldman typical testors is too high. Modifications of the training matrix very frequently appear in real world problems. Any modification to the training matrix can change the set of all Fuzzy Goldman typical testors, so this set must be computed again after each modification. This paper analyzes one of the sensitivity problems in Pattern Recognition: how does the set of all Fuzzy Goldman typical testors change after modifications of the training matrix. Four theorems about the behavior of the set of all Fuzzy Goldman typical testors are proposed and proved. An alternative method for calculating all Fuzzy Goldman typical testors of the modified matrix, more efficient than any traditional testor finding algorithm, is proposed. The new method's complexity is analyzed and some experimental results are shown. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods;Mathematics, Applied;Statistics & Probability U5 - J;Article AV - English IS - 0165-0114 UR - ISI:000187914600005 L2 - pattern recognition;combinatorial problems;fuzzy Goldman typical testor;feature relevance;logical combinatorial approach SO - Fuzzy Sets and Systems 2004 ;141(2):241-257 10379 UI - 5156 AU - Carreon E AU - Juerez M AU - Fievet C AU - Luc G AU - Perez-Mendez O AD - Inst Nal Cardiol, Dept Fisiol, Juan Badiano, DF, MexicoInst Pasteur, DLP, F-59019 Lille, France TI - Pioglitazone induces hypercatabolism of HDL- apolipoprotein A-I in the rabbit MH - France MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 1567-5688 UR - ISI:000221639000276 SO - Atherosclerosis Supplements 2004 ;5(1):64-64 10380 UI - 4951 AU - Carrillo-Catalan R AU - Sabinina L AD - Univ Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62191, Morelos, MexicoUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca, Morelos, MexicoCarrillo-Catalan, R, Tokyo Metropolitan Univ, Dept Math, Grad Sch Sci, Minami Ohsawa 1-1, Hachioji, Tokyo 1920397, Japan TI - On smooth power-alternative loops AB - The aim of this paper is to show that if at every point of some neighborhood of a smooth manifold with an affine connection the geodesic loop is power-alternative and left A-loop, then this loop is a Moufang loop. We give an example of the tangent algebra of such a loop MH - Japan MH - Mexico|Morelos PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0092-7872 UR - ISI:000222673400006 L2 - geodesic loop;A(l)-loop;Moufang loop;Malcev algebra;power-alternativity;reductive Kikkawa space SO - Communications in Algebra 2004 ;32(8):2969-2976 10381 UI - 6351 AU - Carrillo-Nava E AU - Dohnal V AU - Costas M AD - Univ Nacl Autonoma Mexico, Lab Termofis, Dept Fisicoquim, Fac Quim, Mexico City 04510, DF, MexicoInst Chem Technol, Dept Phys Chem, CR-16628 Prague 6, Czech RepublicCostas, M, Univ Nacl Autonoma Mexico, Lab Termofis, Dept Fisicoquim, Fac Quim, Mexico City 04510, DF, Mexico TI - Modeling Gibbs energies of solution for a non-polar solute in aqueous solutions of the protein stabilizers glycerol and ethylene glycol AB - The Hydration Shell Chemical Equilibrium Model (HSCE) has been applied to Gibbs energies of solution data for toluene in aqueous solutions of the protein stabilizers glycerol and ethylene glycol. The HSCE model fits the experimental data to nearly experimental uncertainty. This satisfactory rendering of the data provides certainty on the physical significance of the model parameters and allows a description, from the molecular point of view, of the behaviour of a non-polar solute in aqueous solutions of protein stabilizers. The toluene-stabilizer interchange energy is positive indicating a dislike between toluene and the stabilizer molecules. This dislike is, however, much less pronounced than that between the solute and water, i.e. the non-polar solute prefers to be in contact with the stabilizer rather than with water. The cohesion between water molecules is much larger than that between stabilizer molecules and it remains to be the dominant cause of the hydrophobic behaviour of the non-polar solute. Since the solute-stabilizer interactions are energetically favoured over the solute-water ones, in the vicinity of the solute the stabilizer molecules are preferred over water ones. However, there is no specific interaction leading to a distinct chemical entity (a solute-stabilizer complex). Thus, the non-polar solute-stabilizer interaction is better described by the term 'preferential solvation of the solute by the stabilizer'. (C) 2003 Elsevier B.V. All rights reserved MH - Czech Republic MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biophysics;Chemistry, Physical U5 - J;Article AV - English IS - 0301-4622 UR - ISI:000188611800003 L2 - protein stabilization;aqueous stabilizer solvent;non-polar solute;hydrophobic hydration model;preferential solvation;glycerol;ethylene glycol;DENATURANTS; WATER SO - Biophysical Chemistry 2004 ;107(1):19-24 10382 UI - 3611 AU - Carrillo JZP AU - Fernandez M AU - Barrera M AU - Bahena J AU - Estrella M AU - Ruiz RO AU - Lepe L AU - Arriaga R AU - Bonilla C AU - Fonseca S AU - Miranda S AU - Segovia C AU - Viesca MDCG AD - Univ Guadalajara, Hosp Civil Dr Juan I Menchaca, Inst Invest Cardiovasc, Guadalajara 44430, Jalisco, MexicoInst Nutr & Ciencias Med Salvador Zubiran, Clin Hipertens, Mexico City, DF, MexicoClin Merida, Merida, Yucatan, VenezuelaHosp Univ Monterrey, Serv Cardiol, Monterrey, Nuevo Leon, MexicoHosp Valentin Gomez Farias ISSSTE Guadalajara, Guadalajara, Jalisco, MexicoCtr Med Nacl La Raza, IMSS, Serv Cardiol, Mexico City, DF, MexicoHosp Cardiol, Ctr Med Nacl Siglo XXI IMSS, Mexico City, DF, MexicoBoehringer Ingelheim Promeco, Dept Med, Mexico City, DF, MexicoCarrillo, JZP, Salvador Quevedo & Zubieta, 750 Col Independencia, Guadalajara 44340, Jalisco, Mexico TI - Effect of telmisartan 80 mg once daily on 24-h blood pressure profile in patients with mild-to-moderate hypertension failing to respond to prior anti hypertensive therapy AB - Blood pressure is not adequately controlled in almost 50% of patients with hypertension who are in receipt of antihypertensive therapy. This multicentre, prospective, open-label trial was designed to determine whether or not once-daily telmisartan 80 mg reduced blood pressure during the last 6 h of the 24-h dosing interval in patients with mild-to-moderate hypertension who were unresponsive to previous antihypertensive therapy. The study comprised 100 patients (47 males, 53 females) who had failed to respond satisfactorily to prior treatment given for a minimum of 3 months. At screening, 24-h ambulatory blood pressure monitoring (ABPM) was conducted after the patient had been treated with the currently prescribed antihypertensive medication. Following 5 weeks of telmisartan 80 mg treatment, ABPM was repeated. Telmisartan significantly reduced mean systolic blood pressure, diastolic blood pressure (DBP) and pulse pressure compared with previous antihypertensive therapy over each time interval (24-h, morning, night-time and the last 6 h of the dosing interval [2.00 a.m.-8.00 a.m.]) analysed. In addition, more than 90% of patients responded successfully (clinic DBP <90 mmHg or a >10 mmHg reduction in clinic DBP) at the end of telmisartan treatment. In conclusion, telmisartan provides effective blood pressure control throughout the 24-h dosing interval in patients with mild-to-moderate hypertension who were unresponsive to previous antihypertensive medication MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - Venezuela PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1368-5031 UR - ISI:000225945300003 L2 - Telmisartan;ambulatory blood pressure monitoring;angiotensin II receptor blocker;antihypertensives;hypertension;II-RECEPTOR ANTAGONIST; PULSE PRESSURE; ANGIOTENSIN; EFFICACY; POPULATION; MANAGEMENT; VALSARTAN; TRIAL SO - International Journal of Clinical Practice 2004 ;58():9-15 10383 UI - 3608 AU - Carter N AU - Ortolano L AD - Stanford Univ, Terman Engn Ctr, Dept Civil & Environm Engn, Stanford, CA 94305, USACtr Econ Res & Teaching, Mexico City, DF, MexicoOrtolano, L, Stanford Univ, Terman Engn Ctr, Dept Civil & Environm Engn, Room M42, Stanford, CA 94305 USA TI - Implementing government assistance programmes for water and sewer systems in Texas colonias AB - Experience in colonias-informal communities in Texas characterized by the absence of water and sewer systems-demonstrates that a well-funded programme to subsidize infrastructure can falter if the incentives and management capacity of involved organizations do not support effective implementation. The Texas Legislature established the Economic Distressed Areas Programme (EDAP) in 1989 to subsidize service providers constructing water and sewer systems in colonias. A longitudinal assessment Of EDAP found that the programme performed poorly until the late 1990s when the institutional context of the agency administering the programme changed. These changes led to a more effective set of incentives to implement the programme and improved performance. General lessons regarding programme performance are derived from the research results MH - USA MH - Mexico|Distrito Federal PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Water Resources U5 - J;Article AV - English IS - 0790-0627 UR - ISI:000225897100006 SO - International Journal of Water Resources Development 2004 ;20(4):553-564 10384 UI - 5131 AU - Carvajal E AU - Navarro O AU - Allub R AU - Avignon M AU - Alascio B AD - UNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoCtr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble, FranceNavarro, O, UNAM, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Electronic and magnetic properties of the double perovskite Sr2FeMoxW1-xO6 AB - The ordered double perovskite Sr2FeMoxW1-xO6 compounds exhibit a transition from a ferromagnetic metal to an antiferromagnetic insulator with decreasing doping x. To understand the origin of this transition, using a double exchange type model with interaction between localized Fe spins and conduction electrons together with a tight-binding Hamiltonian and the renormalized perturbation expansion, we study the ferromagnetic phase and the ferro-antiferromagnetic transition with x. (C) 2003 Elsevier B.V. All rights reserved MH - Argentina MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236800057 L2 - magnetoresistance;ordered double-perovskites;metal-insulator transition;MAGNETORESISTANCE; SR2FEMOO6; OXIDE; FE SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():1774-1775 10385 UI - 2995 AU - Casasola-Vargas J AU - Villegas MC AU - Morote G AU - Huerta-Sil G AU - Munoz-Gomariz E AU - Font R AU - Collantes E AU - Burgos-Vargas R AD - Hosp Gen Mexico City, Mexico City, DF, MexicoHosp Univ Reina Sofia, Cordoba, Spain TI - A cross-sectional comparative study of Mexican and Spanish patients with spondyloarthropathies (SpA) MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551501417 SO - Annals of the Rheumatic Diseases 2004 ;63():420-420 10386 UI - 907 AU - Casavantes LC AU - Gottlieb M AD - Clin Estetica, Tijuana, BC, MexicoPolymekon, USA, San Diego, CA USA TI - Bio-Alcamid (TM), a high-volume injectable prosthesis for facial reconstruction in HIV-related lipoatrophy: report on 100 patients MH - Mexico|Baja California MH - USA PB - LONDON: INT MEDICAL PRESS LTD RP - NOT IN FILE U3 - TC 2 U4 - Infectious Diseases;Pharmacology & Pharmacy;Virology U5 - J;Meeting Abstract AV - English IS - 1359-6535 UR - ISI:000231616000089 SO - Antiviral Therapy 2004 ;9(6):L37-L37 10387 UI - 5657 AU - Casillas FJ AU - Davila A AU - Rothberg SJ AU - Garnica G AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Loughborough, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, EnglandCasillas, FJ, Ctr Invest Opt, Loma Bosque 115, Leon 37150, Gto, Mexico TI - Small amplitude estimation of mechanical vibrations using electronic speckle shearing pattern interferometry AB - Electronic speckle shearing pattern interferometry (ESSPI) is a technique that has been used for surface strain and vibration analysis, assuming that simple derivatives are obtained by this technique. However, large shears are usually introduced in the interferometer to increase its sensitivity and to analyze small amplitudes of vibration, limiting this technique to the calculation of approximated derivatives. As strain is related to the exact derivative of the in-plane and out-of-plane deformations, the association with the approximated derivatives can result in reduced accuracy in the quantification of strain. We propose the use of a recently developed phase-recovering technique in stroboscopic ESSPI for improving the overall accuracy of the estimated amplitude of vibration. A successful mode comparison is revealed between a controlled ESSPI experiment with a large shear and finite element (FE) modeling. (C) 2004 Society of Photo-Optical Instrumentation Engineers MH - United Kingdom MH - Mexico|Guanajuato PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000220968500016 L2 - speckle;interferometry;shearing;vibration;PHASE-MAP RECOVERY; SHEAROGRAPHY; INTERFEROGRAMS; STRAIN SO - Optical Engineering 2004 ;43(4):880-887 10388 UI - 5850 AU - Castaneda-Roldan EI AU - velino-Flores F AU - Dall'Agnol M AU - Freer E AU - Cedillo L AU - Dornand J AU - Giron JA AD - Univ Autonoma Puebla, Inst Ciencias, Puebla 72570, MexicoUniv Costa Rica, Unidad Microscopia Elect, San Jose, Costa RicaUniv Montpellier 2, INSERM, U431, F-34095 Montpellier 05, FranceGiron, JA, Univ Autonoma Puebla, Inst Ciencias, Edificio 76,Complejo Ciencias, Puebla 72570, Mexico TI - Adherence of Brucella to human epithelial cells and macrophages is mediated by sialic acid residues AB - The basis for the interaction of Brucella species with the surface of epithelial cells before migration in the host within polymorphonuclear leucocytes is largely unknown. Here, we studied the ability of Brucella abortus and Brucella melitensis to adhere to cultured epithelial (HeLa and HEp-2) cells and THP-1-derived macrophages, and to bind extracellular matrix proteins (ECM). The brucellae adhered to epithelial cells forming localized bacterial microcolonies on the cell surface, and this process was inhibited significantly by pretreatment of epithelial cells with neuraminidase and sodium periodate and by preincubation of the bacteria with heparan sulphate and N-acetylneuraminic acid. Trypsinization of epithelial cells yielded increased adherence, suggesting unmasking of target sites on host cells. Notably, the brucellae also adhered to cultured THP-1 cells, and this event was greatly reduced upon removal of sialic acid residues from these cells with neuraminidase. B. abortus bound in a dose-dependent manner to immobilized fibronectin and vitronectin and, to a lesser extent, to chondroitin sulphate, collagen and laminin. In sum, our data strongly suggest that the adherence mechanism of brucellae to epithelial cells and macrophages is mediated by cellular receptors containing sialic acid and sulphated residues. The recognition of ECM (fibronectin and vitronectin) by the brucellae may represent a mechanism for spread within the host tissues. These are novel findings that offer new insights into understanding the interplay between Brucella and host cells MH - Costa Rica MH - France MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Cell Biology;Microbiology U5 - J;Article AV - English IS - 1462-5814 UR - ISI:000220589300004 L2 - FIBRONECTIN-BINDING PROTEIN; NONPHAGOCYTIC CELLS; INTRACELLULAR TRAFFICKING; NEISSERIA-GONORRHOEAE; EXTRACELLULAR-MATRIX; INVASION; ABORTUS; VITRONECTIN; ATTACHMENT; INFECTION SO - Cellular Microbiology 2004 ;6(5):435-445 10389 UI - 5343 AU - Castaneda H AU - Urquidi-Macdonald M AD - Penn State Univ, University Pk, PA 16802, USAInst Mexicano Petr, Programa Desarrollo & Invest Ductos, Mexico City 07730, DF, MexicoUrquidi-Macdonald, M, Penn State Univ, 203 C Earth & Engn Sci Bldg, University Pk, PA 16802 USA TI - Detecting external failures in coated, buried pipelines: Theoretical model and experimental verification AB - An experimental prototype, comprising a buried pipeline, was built with the purpose of calibrating a transmission line model and an artificial neural network (ANN) algorithm for locating and assessing the severity of external corrosion damage of defects in the pipeline's coating when the pipe was subjected to different levels of cathodic protection (CP) and to different environmental scenarios. The environmental scenarios were created by changing the value of different variables in the physical model, such as soil resistivity, defect (holiday) location, positions of reference and counter electrodes, and level of CP. The theoretical models were able to establish trends in the impedance signatures collected on the pipe system and corresponding to different damage locations and extents without further experimental work. The proposed theoretical-experimental methodology accurately could assess the level of CP, locate the position of holidays without the need to excavate, and estimate the severity (qualitative scale 1 to 100) of the corrosion damage at the defect sites MH - Mexico|Distrito Federal MH - USA PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000221875000003 L2 - artificial neural network;coating defects;detection of defects;transmission line model;COATINGS; STEEL SO - Corrosion 2004 ;60(6):538-547 10390 UI - 5062 AU - Castellanos-Guzman AG AU - Correa-Gomez A AU - Czank M AU - Singh G AU - Tiwari VS AU - Wadhawan VK AD - Univ Guadalajara, Lab Invest Mat DIP, Guadalajara 44281, Jalisco, MexicoUniv Guadalajara, Dept Fis, Guadalajara 44550, Jalisco, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCtr Adv Technol, Laser Mat Div, Indore 452013, IndiaCastellanos-Guzman, AG, Univ Guadalajara, Lab Invest Mat DIP, Guadalajara 44281, Jalisco, Mexico TI - Ferroic phase transitions in Zn3B7O13X boracites AB - Thermal properties of Zn3B7O13X (X = Cl, Br, I) boracites have been investigated at the vicinity of the ferroic phase transitions underwent by this triad of crystals. The cubic --> orthorhombic phase transitions in these compositions appear to be first order MH - Germany MH - India MH - Mexico|Jalisco PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0015-0193 UR - ISI:000222471000036 L2 - structural phase transitions;boracites;enthalpy;ferroic materials SO - Ferroelectrics 2004 ;301():219-223 10391 UI - 3919 AU - Castets A AU - Reipurth B AU - Loinard L AD - Observ Bordeaux, F-33270 Floirac, FranceUniv Hawaii, Inst Astron, Hilo, HI 96720, USAUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCastets, A, Observ Bordeaux, BP 79, F-33270 Floirac, France TI - Millimeter observations of the HH 222 region AB - The HH 222 streamers in Orion and their associated non-thermal radio jet form a unique object, whose nature remains enigmatic. We have carried out a set of detailed millimeter observations around the non-thermal radio source in several transitions of the CO, (CO)-C-13 (CO)-O-18 and CS molecules. We find that the radio source is not associated with any molecular outflow nor located within a dense molecular core, and is therefore very unlikely to be a newborn star. The observations are in principle consistent with the radio source being a more evolved T Tauri star undergoing an energetic event, but it could also be an evolved object (an X-ray binary or a microquasar) accidentally passing through the large Orion cloud complex MH - France MH - Mexico|Michoacan MH - USA PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000225197500015 L2 - ISM : jets and outflows;ISM : Herbig-Haro objects;ISM : molecules;stars : formation;stars : pre-main sequence;radio lines : ISM;YOUNG STELLAR OBJECTS; STAR-FORMING REGIONS; MOLECULAR CLOUDS; RADIO-SOURCES; SERPENS; ORION; JET; GALAXY SO - Astronomy & Astrophysics 2004 ;427(3):895-899 10392 UI - 4925 AU - Castillo-Toledo B AU - Celikovsky S AU - Di Gennaro S AD - CINVESTAV IPN, Guadalajara 44550, Jalisco, MexicoAcad Sci Czech Republ, Inst Informat Theory & Automat, Prague 18208 8, Czech RepublicUniv Aquila, Dept Elect Engn, I-67040 Laquila, ItalyCastillo-Toledo, B, CINVESTAV IPN, Unidad Guadalajara AP 31-438 Pza La Luna, Guadalajara 44550, Jalisco, Mexico TI - Generalized immersion and nonlinear robust output regulation problem AB - The problem of output regulation of the system affected by unknown constant parameters is considered here. Under certain assumptions, such a problem is known to be solvable using error feedback via the so-called immersion to an observable linear system with outputs. Nevertheless, for many interesting cases this kind of finite dimensional immersion is difficult or even impossible to find. In order to achieve constructive procedures for wider classes, this paper investigates a more general type of immersion. Such a generalized immersion enables to solve robust output regulation problem via dynamic feedback compensator using error and exosystem state measurement. When the exosystem states are not completely measurable, a modified observed-based generalized immersion is then presented. The main result obtained here is that under reasonable assumptions both the full and partial exosystem measurement problems are equivalently solvable. Examples together with computer simulation are included to clarify the suggested approach MH - Czech Republic MH - Italy MH - Mexico|Jalisco PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000222601100004 L2 - output regulation;robust;nonlinear;immersion;SYSTEMS SO - Kybernetika 2004 ;40(2):207-220 10393 UI - 4746 AU - Castillo-Villalon P AU - Ramirez J AU - Peltre MJ AU - Louis C AU - Massiani P AD - Univ Paris 06, CNRS, UMR 7609, Lab React Surface, F-75252 Paris 05, FranceUniv Nacl Autonoma Mexico, UNICAT, Dept Ingn Quim, Lab 225, Mexico City 04510, DF, MexicoMassiani, P, Univ Paris 06, CNRS, UMR 7609, Lab React Surface, 4 Pl Jussieu, F-75252 Paris 05, France TI - An UV-Visible study of the stability of the ruthenium hexaammine cation in BEA zeolites - comparison with NaY AB - A series of Ru/zeolites with Ru content in the range of 1-7 wt.% was prepared by cationic exchange in ail aqueous Ru(NH3)(6)Cl-3 solution, at room temperature, of two H-BEA (different particle sizes but same Si/Al ratio of 13), a Cs-BEA (Si/Al = 13) and a NaY (Si/Al = 2.4), zeolitic supports. The quantitative UV-Visible analysis of the solutions during exchange showed that about 90% of the exchange process was over within the first hour of contact between the zeolite and the solution. This analysis also provided an accurate measurement of Ru content in the solids in real time and gave access to the Ru exchange capacities of the zeolitic supports. Diffuse reflectance UV-Visible spectroscopy showed that the [Ru(NH3)(6)](3+) cations were exchanged as such in all the BEA zeolites and were not modified after storage of the solids for several months in ambient conditions. On the contrary, the Ru hexaammine cations in NaY were gradually transformed into the Ru-red-wine [(NH3)(5)(RuO)-O-III-Ru-IV(NH3)(4)-O-Ru-III(NH3)(5)](6+) and Ru-brown [(NH3)(5)Ru-IV-O-Ru-III(NH3)(4)-O-Ru-IV(NH3)(5)](7+) cationic trimers, in agreement with literature data. The transformation rate increased with the Ru loading. The reasons for the higher stability of the [Ru(NH3)(6)](3+) cations in the BEA series than in NaY are discussed MH - France MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000223041400078 L2 - Y-TYPE ZEOLITES; FISCHER-TROPSCH SYNTHESIS; AMMONIA-SYNTHESIS; EXCHANGED ZEOLITES; BASIC ZEOLITES; BETA-ZEOLITE; CATALYSTS; HYDROGENATION; RU; CLUSTERS SO - Physical Chemistry Chemical Physics 2004 ;6(13):3739-3746 10394 UI - 3903 AU - Castillo A AU - Infante F AU - Lopez G AU - Trujillo J AU - Kirkendall LR AU - Vega FE AD - ECOSUR, Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoInst Fitosanidad, Colegio Posgraduados, Montecillo 56230, Edo De Mexico, MexicoUniv Bergen, Inst Zool, N-5007 Bergen, NorwayUSDA, Insect Biocontrol Lab, ARS, Beltsville, MD 20705, USACastillo, A, ECOSUR, Colegio Frontera Sur, Carretera Antiguo Aeropuerto Km 2.5, Tapachula 30700, Chiapas, Mexico TI - Laboratory parasitism by Phymastichus coffea (Hymenoptera : Eulophidae) upon non-target bark beetles associated with coffee plantations AB - Phymastichus coffea (LaSalle) is an African parasitoid of adults of the coffee berry borer Hypothenemus hampei (Ferrari) that has been introduced to Mexico and other Central and South American countries for the biological control of this important pest. The present study assessed the host specificity of this parasitoid in the laboratory. We tested the acceptance and parasitism of R coffea on five species of bark beetle adults commonly found in coffee plantations of Mexico: Hypothenemus crudiae, H. plumeriae, H. eruditus, Scolytodes borealis and Araptus fossifrons. As a control, we used adults of H. hampei, the natural host. R coffea parasitized and successfully completed its life cycle in H. crudiae and H. eruditus, as well as in H. hampei. The degree to which bark beetles were attacked by P. coffea was estimated by percent of parasitism, which was 64% for H. hampei, 14% for H. crudiae, and 6% for H. eruditus. The risk of potential deleterious effects of the parasitoid on non-target organisms in coffee agroecosystems is discussed MH - Mexico|Chiapas MH - Mexico|Estado De Mexico MH - Norway MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000225044300004 L2 - host specificity;Phymastichus;Hypothenemus;Scolytodes;Araptus;Mexico;BRASSICAE BEZDENKO HYMENOPTERA; BIOLOGICAL-CONTROL AGENT; FERRARI COLEOPTERA; BERRY BORER; SCOLYTIDAE; TRICHOGRAMMATIDAE; TETRASTICHINAE SO - Florida Entomologist 2004 ;87(3):274-277 10395 UI - 5776 AU - Castillo A AU - Mercado I AU - Lucia LM AU - Martinez-Ruiz Y AU - De Leon JP AU - Murano EA AU - Acuff GR AD - Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USAUniv Guadalajara, Dept Biol & Pharm, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Program Biotechnol Proc, Guadalajara 44430, Jalisco, MexicoCastillo, A, Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USA TI - Salmonella contamination during production of Cantaloupe: A binational study AB - Six cantaloupe farms and packing plants in South Texas (950 cantaloupe, 140 water, and 45 environmental samples), including the Rio Grande Valley area, and three farms in Colima State, Mexico (300 cantaloupe, 45 water, and 15 environmental samples), were sampled to evaluate cantaloupe contamination with Salmonella and Escherichia coli during production and processing. Samples collected from external surfaces of cantaloupes, water, and the environments of packing sheds on cantaloupe farms were examined for the presence of Salmonella and E. coli. Of a total of 1,735 samples collected, 31 (1.8%) tested positive for Salmonella. Fifteen Salmonella serotypes were isolated from samples collected in Texas, and nine from samples collected in Colima. Two serotypes (Poona and Oranienburg) that have been associated with three large Salmonella outbreaks in the United States and Canada linked to the consumption of contaminated cantaloupe were found in water samples collected at four farms (three from the United States). Susceptibility of Salmonella isolates to 10 antimicrobials was evaluated by disk diffusion. Eighty-eight percent of the isolates from the United States and Mexico were pansusceptible to the antimicrobials tested; eight isolates from the United States demonstrated an intermediate susceptibility to streptomycin and only two isolates were resistant to the same antimicrobial. From Mexico, four isolates showed an intermediate susceptibility to streptomycin and one isolate was resistant to nalidixic Acid and streptomycin. Repetitive sequence-based PCR analysis of Salmonella isolates helped to trace potential sources of Salmonella contamination in source water and in subsequent water samples obtained after the filtration systems of U.S. and Mexican cantaloupe farms. No differences could be seen between the levels of Salmonella contamination in melons from both countries MH - Mexico|Jalisco MH - USA PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 14 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000220705800013 L2 - SHIGELLA-SONNEI; OUTBREAK; WATERMELON; GROWTH SO - Journal of Food Protection 2004 ;67(4):713-720 10396 UI - 6010 AU - Castillo ML AU - Lobo JM AD - CSIC, Museo Nacl Ciencias Nat, Dept Biodiversidad & Biol Evolut, E-28006 Madrid, SpainInst Ecol, Mexico City 91000, DF, MexicoLobo, JM, CSIC, Museo Nacl Ciencias Nat, Dept Biodiversidad & Biol Evolut, C Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - A comparison of Passalidae (Coleoptera, Lamellicornia) diversity and community structure between primary and secondary tropical forest in Los Tuxtlas, Veracruz, Mexico AB - Comparison of the diversity and community structure of Coleoptera (Passalidae) collected in Los Tuxtlas, Veracruz, Mexico, in primary and secondary tropical forest has been carried out. The saproxylophagous beetles studied can be differentiated according to their presence in three distinct microhabitats of rotting logs: underbark, sapwood - heartwood and microhabitat generalists. Over the 2-year study period, 12 passalid species were recorded (six Passalini and six Proculini) represented by a total of 2971 individuals, collected from 234 rotting logs. The rarefaction method, the lognormal species - abundance relationship, and the nonparametric jackknife method were used to compare species richness between the habitats. The data were also fitted to log series, truncated lognormal, geometric, and broken-stick species abundance models to detect changes in community structure. The community composition of Passalidae in Los Tuxtlas did not differ ostensibly between the primary and secondary forests. Neither the mean number of individuals nor the biomass per log differed significantly. Furthermore, there were no significant differences between the two habitats in terms of the number of underbark, sapwood/heartwood, and microhabitat generalist species. Different richness estimators indicated that the primary forest community is only slightly richer. The slight decrease in richness of the secondary forest is related to a decrease in dominance by certain species, as well as to a more balanced abundance distribution, which is adequately described by the broken-stick model. Complementary explanations for this pattern may be: ( 1) that logging reduces the abundance of dominant species, thus preventing competitive exclusion in the secondary forest; and ( 2) that passalid diversity is not regulated by the diversity of tree species MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000220213500002 L2 - coleoptera;community structure;Passalidae;rotting logs;species diversity;tropical forest disturbance;SPECIES ABUNDANCE PATTERNS; RAIN-FOREST; DISTURBANCE; BUTTERFLIES; SIZE SO - Biodiversity and Conservation 2004 ;13(7):1257-1269 10397 UI - 5141 AU - Castillo P AU - Dzul A AU - Lozano R AD - Univ Technol Compiegne, CNRS, UMR 6599, Ctr Rech, F-60200 Compiegne, FranceInst Tecnol La Laguna, Div Estudios Posgrado & Invest, Coahuila 27000, MexicoCastillo, P, Univ Technol Compiegne, CNRS, UMR 6599, Ctr Rech, F-60200 Compiegne, France TI - Real-time stabilization and tracking of a four-rotor mini rotorcraft AB - In this paper, we present a controller design and its implementation on a mini rotorcraft having four rotors. The dynamic model of the four-rotor rotorcraft is obtained via a Lagrange approach. The proposed controller is based on Lyapunov analysis using a nested saturation algorithm. The global stability analysis of the closed-loop system is presented. Real-time experiments show that the controller is able to perform autonomously the tasks of taking off, hovering, and landing MH - France MH - Mexico|Coahuila PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 11 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000222277800002 L2 - aircraft control;aircraft dynamics;helicopter control;Lyapunov methods;real-time systems;recursive control algorithms;SYSTEMS SO - Ieee Transactions on Control Systems Technology 2004 ;12(4):510-516 10398 UI - 3952 AU - Castro-Guerrero NA AU - Krab K AU - Moreno-Sanchez R AD - Inst Nacl Cardiol, Dept Bioquim, Mexico City 14080, DF, MexicoVrije Univ Amsterdam, Amsterdam, NetherlandsMoreno-Sanchez, R, Inst Nacl Cardiol, Dept Bioquim, Juan Badiano 1,Col Secc 16, Mexico City 14080, DF, Mexico TI - The alternative respiratory pathway of Euglena mitochondria AB - Mitochondria, isolated from heterotrophic Euglena gracilis, have cyanide-resistant alternative oxidase (AOX) in their respiratory chain. Cells cultured under a variety of oxidative stress conditions (exposure to cyanide, cold, or H2O2) increased the AOX capacity in mitochondria and cells, although it was significant only under cold stress; AOX sensitivity to inhibitors was also increased by cold and cyanide stress. The value of AOX maximal activity reached 50% of total respiration below 20degreesC, whereas AOX full activity was only 10-30% of total respiration above 20degreesC. The optimum pH for AOX activity was 6.5 and for the cytochrome pathway was 7.3. GMP, AMP, pyruvate, or DTT did not alter AOX activity. The reduction level of the quinone pool was higher in mitochondria from cold-stressed than from control cells; furthermore, the content of reduced glutathione was lower in cold-stressed cells. Growth in the presence of an AOX inhibitor was not affected in control cells, whereas in cold-stressed cells, growth was diminished by 50%. Cyanide diminished growth in control cells by 50%, but in cold-stressed cells this inhibitor was ineffective. The data suggest that AOX activity is part of the cellular response to oxidative stress in Euglena MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Biophysics;Cell Biology U5 - J;Article AV - English IS - 0145-479X UR - ISI:000224962400004 L2 - alternative oxidase inhibitors;cold stress;oxidative stress;ACANTHAMOEBA-CASTELLANII MITOCHONDRIA; CYANIDE-RESISTANT OXIDASE; PLANT-MITOCHONDRIA; GRACILIS MITOCHONDRIA; ELECTRON-TRANSPORT; TERMINAL OXIDASE; OXYGEN; UBIQUINONE; COMPLEX; TEMPERATURE SO - Journal of Bioenergetics and Biomembranes 2004 ;36(5):459-469 10399 UI - 5098 AU - Castro JJ AU - Carsteanu AA AU - Flores CG AD - IPN, Dept Fis, CINVESTAV, Mexico City 07360, DF, MexicoUniv Karlsruhe, TH, Lehrstuhl Versicherungswissensch, D-76133 Karlsruhe, GermanyIPN, Dept Matemat, CINVESTAV, Mexico City 07360, DF, MexicoCastro, JJ, IPN, Dept Fis, CINVESTAV, Av IPN 2508, Mexico City 07360, DF, Mexico TI - Intensity-duration-area-frequency functions for precipitation in a multifractal framework AB - An intensity-duration-area-frequency (IDAF) function is derived for the small-scale, large-intensity limit of multifractal fields. A parameterization of the function from tropical rainfall, filmed with a digital camera in Mexico City, is being attempted. Implications of the formulae are being discussed. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000222215400029 L2 - precipitation;multifractals;extreme events;intensity-duration-area-frequency;RAINFALL; CURVES SO - Physica A-Statistical Mechanics and Its Applications 2004 ;338(1-2):206-210 10400 UI - 5367 AU - Castro JM AU - Rios MC AU - Mount-Campbell CA AD - Ohio State Univ, Dept Ind Welding & Syst Engn, Columbus, OH 43210, USAUniv Autonoma Nuevo Leon, Grad Programme Syst Engn, San Nicolas Garza 66450, NL, MexicoCastro, JM, Ohio State Univ, Dept Ind Welding & Syst Engn, Columbus, OH 43210 USA TI - Modelling and simulation in reactive polymer processing AB - Modelling and simulation in reactive polymer processing have been active research areas for the past decades in academic institutions as well as within the industry. Both areas have played a key role in advancing and optimizing reactive polymer processing operations. The objective of this paper is to review the two major classifications of models used to simulate polymer processes: physics based models and empirical models. Additionally, a section on multiple criteria optimization using data envelopment analysis has been included for completeness. The work presented here helps define a decision-making framework for the creation of reactive polymer process models and for the effective selection of settings of the process variables based on these models MH - USA MH - Mexico|Nuevo Leon PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Review AV - English IS - 0965-0393 UR - ISI:000221686300021 L2 - INJECTION-MOLDING PROCESS; TEMPERATURE RISE; TIME; NETWORKS SO - Modelling and Simulation in Materials Science and Engineering 2004 ;12(3):S121-S149 10401 UI - 3563 AU - Castro RR AU - Gallipoli MR AU - Mucciarelli M AD - CICESE, Div Ciencias Tierra, Dept Sismol, Ensenada 22860, Baja California, MexicoCNR, IMAA, Tito, PZ, ItalyUniv Basilicata, DiSGG, I-85100 Potenza, ItalyCastro, RR, CICESE, Div Ciencias Tierra, Dept Sismol, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - An attenuation study in Southern Italy using local and regional earthquakes recorded by seismic network of Basilicata AB - We determined a set of empirical functions that describe the spectral amplitude decay of S-waves with distance in Southern Italy. We analyzed 32 earthquakes with magnitudes M-L 2.0-5.4 and hypocentral distances ranging between 12 and 216 km. We obtained attenuation functions for 14 frequencies (1.05.0 Hz), the spectral amplitudes are above the average. At higher frequencies (f>10 Hz), the attenuation functions obtained for Southern Italy are slightly above the standard deviation of the average attenuation functions. It is possible that in this frequency range (10-20 Hz) site effects may influence the amplitude decay. In order to quantify the attenuation of the S-waves, we estimated the quality factor Q modeling the empirical attenuation functions using the following parametric form: A(f, r)=10/r(b).e(-pifR/Qbeta); where 1.6 less than or equal to f less than or equal to 10.0 Hz is the frequency band with minimum effect of instrument and site response, rless than or equal to120 km is the distance range where the rate of decay of the spectral amplitudes is approximately constant, R=(r-10) and beta=3.2 km/s. We found that the exponent b=1.0+/-0.2 in the frequency band analyzed and Q shows a frequency dependence that can be approximated by the function Q=32.1 f(1.7) MH - Italy MH - Mexico|Baja California PB - BOLOGNA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1593-5213 UR - ISI:000226124400007 L2 - seismic attenuation;Southern Italy;Q;GROUND-MOTION; SITE RESPONSE; PARAMETERS; UMBRIA; ZONE; SEQUENCE; WAVES; ARC SO - Annals of Geophysics 2004 ;47(5):1597-1608 10402 UI - 5579 AU - Castro RR AU - Pacor F AU - Bindi D AU - Franceschina G AU - Luzi L AD - CICESE, Div Ciencias Tierra, Dept Sismol, Ensenada 22860, Baja California, MexicoInst Nazl Geofis & Vulcanol, Sez Milano, Milan, ItalyCastro, RR, CICESE, Div Ciencias Tierra, Dept Sismol, Km 107,Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico TI - Site response of strong motion stations in the Umbria, Central Italy, region AB - We used near-field and regional records from 16 earthquakes (M-L 4.6-5.9) located in the epicentral area of the 1997 Umbria-Marche sequence to estimate the site response of 40 strong motion stations. The distribution of hypocenters covers a distance range from 5 to 100 km. We estimated site amplification factors using two techniques, namely a generalized spectral inversion method and horizontal-to-vertical-component spectral ratios (HVSRs) of ground acceleration. For the first approach, we inverted observed spectral amplitudes for site, Q, and source using a reference site. Since the site response estimated using HVSRs assumes that the vertical component of motion is amplification free, we also separated source and site effects by inverting the vertical component of the acceleration spectra. We found that although most of the stations do not show important amplifications on the vertical component, a few of them have a significant vertical amplification at low frequencies (f < 1 Hz). The vertical amplification at those sites ranges from a factor of 2 up to a factor of 25, and we observe that HVSRs underestimate the site response. For the rest of the sites, both techniques give similar site functions (inside the standard error of the estimates). The quality factor Q, representative of the S-wave train, shows a frequency dependence that can be approximated by the relation Qs = 31.2f(1-2), between 0.3 and 9.5 Hz. However, at high frequencies (f > 10 Hz), this dependence weakens, and Qs takes an approximately constant value of 438 MH - Italy MH - Mexico|Baja California PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000221200900015 L2 - VERTICAL SPECTRAL-RATIO; VALLEY DOWNHOLE ARRAY; EARTHQUAKE SEQUENCE; GROUND-MOTION; S-WAVE; SOUTHERN CALIFORNIA; MARCHE; ATTENUATION; THESSALONIKI; AFTERSHOCKS SO - Bulletin of the Seismological Society of America 2004 ;94(2):576-590 10403 UI - 5975 AU - Ceballos-Salobrena A AU - Gaitain-Cepeda L AU - Ceballos-Garcia L AU - Samaranayake LP AD - Natl Autonomous Univ Mexico, Fac Dent, Oral Pathol Lab, Mexico City, DF, MexicoUniv Granada, Fac Dent, Dept Oral Med, Granada, SpainUniv Hong Kong, Fac Dent, Hong Kong, Hong Kong, Peoples R ChinaGaitain-Cepeda, L, Natl Autonomous Univ Mexico, Fac Odontol, Lab Patol Clin & Expt, Div Estudios Postgrado & Invest, Circuito Inst S-N,Ciudad Univ Del Coyoacan, Mexico City 04510, DF, Mexico TI - The effect of antiretroviral therapy on the prevalence of HIV-associated oral candidiasis in a Spanish cohort AB - Objective. To investigate the temporal changes in the prevalence of oral candidiasis in a cohort of Spanish human immunodeficiency virus (HIV)-infected individuals, before and after the introduction of highly active antiretroviral therapy (HAART). Study design. Retrospective analysis of a clinical database from "Carlos Haya" Hospital, Malaga, Spain, from 1995 to 2000. The prevalence of oral candidiasis was assessed in 807 HIV/AIDS patients and the temporal progression of its major variants evaluated using a linear regression model. Results. Overall oral candidiasis was prevalent in 30.0% to 48.3% of the cohort throughout and no significant variation in its incidence was noted during the study period. Prevalence of erythematous candidiasis increased from 24.5% (1995) to 45.0% (2000) and pseudomembranous candidiasis decreased from 22.4% (1995) to 5.2% (2000) (P < .05). Hyperplastic candidiasis was not detected in the cohort after the introduction of HAART therapy. Conclusions. Although oral candidiasis in HIV-infected Spanish individuals has not decreased significantly after the introduction of HAART, there appears to be a significant reduction in hyperplastic and pseudomembranous variants of the disease with a compensatory increase in erythematous candidiasis MH - Mexico|Distrito Federal MH - Peoples R China MH - Spain PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 2 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1079-2104 UR - ISI:000220238000014 L2 - HUMAN-IMMUNODEFICIENCY-VIRUS; KAPOSIS-SARCOMA; OPPORTUNISTIC INFECTIONS; PROTEASE INHIBITOR; AIDS; MANIFESTATIONS; ERA; CANDIDOSIS; LONDON; HAART SO - Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontics 2004 ;97(3):345-350 10404 UI - 5295 AU - Centeno ML AU - Luo J AU - Lindstrom JM AU - Caba M AU - Pau KYF AD - Oregon Hlth & Sci Univ, Natl Primate Res Ctr, Div Reprod Sci & Neurosci, Beaverton, OR 97006, USAUniv Autonoma Tlaxcala, CINVESTAV, Ctr Invest & Reprod Anim, Tlaxcala, MexicoUniv Penn, Sch Med, Dept Neurosci, Philadelphia, PA, USAUniv Veracruzana, Inst Invest Biol, Reprod Biol Lab, Xalapa, Veracruz, MexicoPau, KYF, Oregon Hlth & Sci Univ, Natl Primate Res Ctr, Div Reprod Sci & Neurosci, 505 NW 185th Ave, Beaverton, OR 97006 USA TI - Expression of alpha 4 and alpha 7 nicotinic receptors in the brainstem of female rabbits after coitus AB - Coital signaling in the female rabbit involves sequential events in the brainstem and hypothalamus, resulting in a massive release of hypothalamic gonadotropin-releasing hormone (GnRH) that peaks within 1-2 h after mating. The neural connections between coitus and GnRH release involves norepinephrine (NE) and acetylcholine (ACh) since administration of antagonists against NE (dibenamine or phentolamine) or ACh (atropine, a-bungarotoxin (alpha-BTX) or scopolamine) blocks or attenuates ovulating events. Moreover, hypothalamic NE release and brainstem tyrosine hydroxylase (TH, the rate-limiting enzyme for NE synthesis) expression in the noradrenergic areas increase prior to, or in concert with, the preovulatory GnRH surge. How ACh is involved in the control of ovulation in the rabbit is lesser known. In the present study, the number of brainstem neurons expressing TH, alpha4 and alpha7 subunits of the nicotinic ACh receptor (nAChR) before and after coitus was determined by immunocytochemistry. Compared to non-mated female rabbits, the number of alpha4, alpha7 and TH single-labeled neurons as well as alpha4/TH and alpha7/TH double-labeled neurons increased in the A1, A2 and A6 brainstem noradrenergic areas at 1 h, but not 2 h, after coitus. The results suggest that the participation of ACh in the control of coitus-induced ovulation may include activation of alpha4beta2 and alpha7 nAChRs in neurons within or adjacent to the brainstem noradrenergic areas in female rabbits. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Tlaxcala MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000222063500001 L2 - nicotinic receptor;acetylcholine;tyrosine hydroxylase;GnRH;coitus;brainstem;CENTRAL-NERVOUS-SYSTEM; GONADOTROPIN-RELEASING-HORMONE; SUBUNIT MESSENGER-RNAS; DOPAMINE-BETA-HYDROXYLASE; ACETYLCHOLINE-RECEPTOR; LOCUS-COERULEUS; NOREPINEPHRINE TRANSPORTER; TYROSINE-HYDROXYLASE; IMMUNOCYTOCHEMICAL LOCALIZATION; SYNAPTIC-TRANSMISSION SO - Brain Research 2004 ;1012(1-2):1-12 10405 UI - 4097 AU - Centurion D AU - Glusa E AU - Sanchez-Lopez A AU - Valdivia LF AU - Saxena PR AU - Villalon CM AD - CINVESTAV, IPN, Dept Farmacol, Mexico City 14330, DF, MexicoUniv Jena, D-99089 Erfurt, GermanyErasmus Med Ctr Rotterdam, COUER, Cardiovasc Res Inst, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, CINVESTAV, IPN, Dept Farmacol, Czda Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - 5-HT7, but not 5-HT2B, receptors mediate hypotension in vagosympathectomized rats AB - This study evaluated the possible involvement of 5-HT2B receptors in long-lasting hypotension to 5-hydroxytryptamine (5-HT), which is predominantly mediated by 5-HT7 receptors, in anaesthetised vagosympathectomized rats. Intravenous injections of 5-HT and 5-carboxamidotryptamine (5-CT) elicited a dose-dependent hypotension that was dose-dependently antagonised by (R)-1-{(3-hydroxyphenyl)sulfonyl-2-{2-(4-methyl-1-piperidinyl) ethyl} pyrrolidine (SB-269970; a selective 5-HT7 receptor antagonist), but not by saline. Interestingly, alpha-methyl-5-(2-thienylmethoxy)-1H-indole-3-ethanamine (BW723C86; a 5-HT2B receptor agonist) produced vasopressor responses without affecting hypotension to 5-HT. These results suggest that hypotension to 5-HT and 5-CT is mainly mediated by 5-HT7 receptors, whilst the role of 5-HT2B receptors seems unlikely. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000224635500009 L2 - hypotension;5-hydroxytryptamine;5-HT7 receptor;5-HT2B receptor;BW723C86;SB-269970;ENDOTHELIUM-DEPENDENT RELAXATION; PITHED RATS; 5-HYDROXYTRYPTAMINE; ANTAGONIST; RESPONSES; SEROTONIN; SUBTYPE SO - European Journal of Pharmacology 2004 ;502(3):239-242 10406 UI - 4114 AU - Cerdeira A AU - Aleman MA AU - Estrada M AU - Flandre D AD - CINVESTAV, Dept Elect Engn, Sect Solid State Elect, Mexico City 07300, DF, MexicoUniv Catholique Louvain, Microelect Lab, B-1348 Louvain, BelgiumCerdeira, A, CINVESTAV, Dept Elect Engn, Sect Solid State Elect, Av IPN 2508,A-P 14-740, Mexico City 07300, DF, Mexico TI - Integral function method for determination of nonlinear harmonic distortion AB - The analysis of harmonic distortion is of prime importance for the analog and mixed integrated circuits. Recently we presented a new integral function method (IFM), based on a completely new principle, which allows the calculation of harmonic distortion using the DC output characteristic of devices or circuits. In this work we complement the integral function method to provide direct calculation of the following distortion figures: total harmonic distortion (THD), second harmonic distortion (HD2) and third harmonic distortion (HD3), voltage intercept points (VIP) and the intermodulation distortion (IMD). The comparison with the same distortion figures calculated by the Fourier coefficients (FC), by direct AC measurements and from FFT in simulators, indicates that results obtained by IFM give an excellent agreement in the full range of the analyzed active regions. The IFM combines simplicity and computer efficiency with accuracy and with the possibility to easily analyze the distortion when varying any of the circuit or device parameters. (C) 2004 Elsevier Ltd. All rights reserved MH - Belgium MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000224520600017 L2 - integral function method;harmonic distortion;intermodulation distortion;voltage intercept points;amplifiers;analog circuits;MOSFET;SOIFD TRANSISTORS SO - Solid-State Electronics 2004 ;48(12):2225-2234 10407 UI - 6740 AU - Cerdeira A AU - Estrada M AU - Iniguez B AU - Pallares J AU - Marsal LF AD - CINVESTAV, Dept Ingn Elect, Sec Elect Estado Solido, Mexico City 07300, DF, MexicoUniv Rovira & Virgili, Dept Engn Elect Elect & Automat, Tarragona 43007, SpainCerdeira, A, CINVESTAV, Dept Ingn Elect, Sec Elect Estado Solido, Av IPN No 2508 Col SP Apto Postal 14-740, Mexico City 07300, DF, Mexico TI - Modeling and parameter extraction procedure for nanocrystalline TFTs AB - In this paper we present a new procedure to determine model parameters for nanocrystalline TFTs. The method is based on a previous method developed by our group, to extract model parameters of a-Si:H and polysilicon TFTs. The, method allows the extraction of the model parameters in the three regions previously observed for nanocrystalline devices, that is, in the subthreshold region and in the two above-threshold regions. These parameters are extracted in a simple and direct way from the experimental measurements, with no need of assigning predetermined values to any other model parameter or using optimization methods. The validity of the procedure is tested for nanocrystalline TFTs, showing a good coincidence between transfer, transconductance and output characteristics calculated using parameter values obtained with our extraction procedure and experimental curves. The proposed method is suitable to be used with circuit simulators such as AIMSpice. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1101 UR - ISI:000187038700016 L2 - microcrystalline;nanocrystalline;TFT modeling;parameter extraction;TRANSISTORS SO - Solid-State Electronics 2004 ;48(1):103-109 10408 UI - 5879 AU - Cerdeirina CA AU - Gonzalez-Salgado D AU - Romani L AU - Delgado MD AU - Torres LA AU - Costas M AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fisicoquim, Lab Termofis, Mexico City 04510, DF, MexicoUniv Vigo, Fac Ciencias, Dept Fis Aplicada, E-32004 Orense, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoCostas, M, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fisicoquim, Lab Termofis, Cd Univ, Mexico City 04510, DF, Mexico TI - Towards an understanding of the heat capacity of liquids. A simple two-state model for molecular association AB - A model for the temperature dependence of the isobaric heat capacity of associated pure liquids C-p,m(o)(T) is proposed. Taking the ideal gas as a reference state, the residual heat capacity is divided into nonspecific C-p(res,ns) and associational C-p(res,ass) contributions. Statistical mechanics is used to obtain C-p(res,ass) by means of a two-state model. All the experimentally observed C-p,m(o)(T) types of curves in the literature are qualitatively described from the combination of the ideal gas heat capacity C-p(id)(T) and C-p(res,ass)(T). The existence of C-p,m(o)(T) curves with a maximum is predicted and experimentally observed, for the first time, through the measurement of C-p,m(o)(T) for highly sterically hindered alcohols. A detailed quantitative analysis of C-p,m(o)(T) for several series of substances (n-alkanes, linear and branched alcohols, and thiols) is made. All the basic features of C-p,m(o)(T) at atmospheric and high pressures are successfully described, the model parameters being physically meaningful. In particular, the molecular association energies and the C-p(res,ns) values from the proposed model are found to be in agreement with those obtained through quantum mechanical ab initio calculations and the Flory model, respectively. It is concluded that C-p,m(o)(T) is governed by the association energy between molecules, their self-association capability and molecular size. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000220456400036 L2 - SELF-ASSOCIATION; LINEAR ALCOHOLS; INERT SOLVENTS; N-ALKANES; 100 MPA; MIXTURES; THERMODYNAMICS; HYDROCARBONS; 1-ALKANOLS; SYSTEMS SO - Journal of Chemical Physics 2004 ;120(14):6648-6659 10409 UI - 4834 AU - Cerutti L AU - Garnache A AU - Ouvrard A AU - Garcia M AU - Cerda E AU - Genty F AD - Univ Montpellier 2, CEM2, F-34095 Montpellier, FranceTHALES Res & Technol, F-91404 Orsay, FranceUniv Autonoma San Luis Potosi, IICO, San Luis Potosi 78000, MexicoRIBER SA, F-92503 Rueil Malmaison, FranceCerutti, L, Univ Montpellier 2, CEM2, F-34095 Montpellier, France TI - 2.36 mu m diode pumped VCSEL operating at room temperature in continuous wave with circular TEM00 output beam AB - Operation of a diode-pumped AlGaAsSb/GaInAsSb type-I quantum-well vertical cavity surface emitting laser emitting near 2.36 mum is reported. The epitaxial structure, grown on GaSb by Molecular beam epitaxy consists of a GaSb/AlAsSb Bragg reflector and a GaInAsSb/AlGaAsSb active region. A circular TEM00 low-divergence laser operation is demonstrated in continuous-wave mode operation from 268 up to 308K. A threshold of 5.5 kW/cm(2) at 268K has been measured MH - France MH - Mexico|San Luis Potosi PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000222922700019 L2 - SURFACE-EMITTING LASER; MU-M SO - Electronics Letters 2004 ;40(14):869-871 10410 UI - 5611 AU - Cervantes FJ AU - Vu-Thi-Thu L AU - Lettinga G AU - Field JA AD - Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85000, Sonora, MexicoUniv Wageningen & Res Ctr, Subdept Environm Technol, NL-6700 EV Wageningen, NetherlandsUniv Arizona, Dept Environm Chem & Engn, Tucson, AZ 85721, USACervantes, FJ, Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, 5 Febrero 818 Sur, Obregon 85000, Sonora, Mexico TI - Quinone-respiration improves dechlorination of carbon tetrachloride by anaerobic sludge AB - The impact of humic acids and the humic model compound, anthraquinone-2,6-disulfonate (AQDS), on the biodegradation of carbon tetrachloride (CT) by anaerobic granular sludge was studied. Addition of both humic acids and AQDS at sub-stoichiometric levels increased the first-order rate of conversion of CT up to 6-fold, leading to an increased production of inorganic chloride, which accounted for 40-50% of the CT initially added. Considerably less dechlorination occurred in sludge incubations lacking humic substances. By comparison, very limited dechlorination occurred in sterile controls with autoclaved sludge. Accumulation of chloroform (1-10%) and dichloromethane (traces) also accounted for the CT converted. The accumulation of a chlorinated ethene, perchloroethylene (up to 9% of added CT), is also reported for the first time as an end-product of CT degradation. A humus-respiring enrichment culture (composed primarily of a Geobacter sp.) derived from the granular sludge also dechlorinated CT, yielding products similar to the AQDS-supplemented granular sludge consortium. The dechlorination of CT by the Geobacter enrichment was dependent on the presence of AQDS or humic acids, which were reduced during the assays. The reduced form of AQDS, anthrahydroquinone-2,6-disulfonate, was shown to cause the chemical reduction of CT when incubated in sterile medium. The results taken as a whole indicate that the formation of reduced humic substances by quinone-respiring microorganisms can contribute to the reductive dechlorination of CT MH - Mexico|Sonora MH - Netherlands MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 15 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000221213700015 L2 - NATURAL ORGANIC-MATTER; METHANOGENIC GRANULAR SLUDGE; TERMINAL ELECTRON-ACCEPTORS; REDUCTIVE DEHALOGENATION; MICROBIAL OXIDATION; REDUCING BACTERIA; AQUEOUS-SOLUTION; REDOX MEDIATORS; DYE REDUCTION; AZO DYES SO - Applied Microbiology and Biotechnology 2004 ;64(5):702-711 10411 UI - 4571 AU - Cespedes CL AU - Torres P AU - Marin JC AU - Arciniegas A AU - de Vivar AR AU - Perez-Castorena AL AU - Aranda E AD - Univ Nacl Autonoma Mexico, Inst Chem, Nat Prod Dept, Chem Ecol Lab 2C, Mexico City 04510, DF, MexicoConcepcion Univ, Fac Nat Sci & Oceanog, Dept Bot, Concepcion, ChileUniv Autonoma Estado Morelos, Biol Control Lab, Ctr Biotechnol, Cuernavaca, Morelos, MexicoCespedes, CL, Univ Nacl Autonoma Mexico, Inst Chem, Nat Prod Dept, Chem Ecol Lab 2C, Av Univ 3000, Mexico City 04510, DF, Mexico TI - Insect growth inhibition by tocotrienols and hydroquinones from Roldana barba-johannis AB - The methanol extract from the aerial parts of Roldana barba-johannis (Asteraceae) afforded sargachromenol, sargahydroquinoic acid, and sargaquinoic acid. These natural products and their corresponding acetylated and methylated derivatives showed insecticidal and insect growth regulatory activities against the Fall Armyworm [Spodoptera frugiperda J.E. Smith, (Lepidoptera: Noctuidae)], an important insect pest of corn. The most active compounds were sargachromenol and its acetylated derivative; sargahydroquinoic acid and its acetylated derivative; and a mixture of sargachromenol, sargahydroquinoic acid, and sargaquinoic acid (6:3:1) and the acetylated form of this mixture. All these compounds and mixtures had significant inhibitory effects between 5.0 and 20.0 ppm in diets. Most compounds were insecticidal to larvae, with lethal doses between 20 and 35 ppm. In addition, these substances also demonstrated scavenging properties toward 2,2-diphenyl-1-picrylhydrazyl radical in TLC autographic and spectrophotometric assays. These compounds appear to have selective effects on the pre-emergence metabolism of the insect. The results from these compounds were fully comparable in activity to those known natural insect growth inhibitors such as gedunin and methanol extracts of Cedrela salvadorensis and Yucca periculosa. These substances may be useful as natural insecticidal agents. (C) 2004 Elsevier Ltd. All rights reserved MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000223504100011 L2 - Roldana barba-johannis;asteraceae;tocotrienols;hydroquinones;insect-growth regulation;Spodopiera frugiperda;fall armyworm;ARMYWORM SPODOPTERA-FRUGIPERDA; DEHYDROZALUZANIN C; TYROSINASE; ACID; PLASTOQUINONES; DERIVATIVES; LEAVES; ANTIOXIDANT; MELIACEAE; FLAVONOLS SO - Phytochemistry 2004 ;65(13):1963-1975 10412 UI - 4849 AU - cevedo-Rosas R AU - Cameron K AU - Sosa V AU - Pell S AD - Inst Ecol, AC, Xalapa 91000, Veracruz, MexicoUniv Guadalajara, CUCSH, Dept Geog, Guadalajara 44120, Jalisco, MexicoNew York Bot Garden, Lewis B & Dorothy Cullman Program Mol Syst Studie, Bronx, NY 10458, USAAcevedo-Rosas, R, Inst Ecol, AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - A molecular phylogenetic study of Graptopetalum (Crassulaceae) based on ETS, ITS, rpl16, and trnl-F nucleotide sequences AB - Nuclear ETS and ITS, as well as plastid rpl16 and trnL-F DNA sequences were used to determine relationships among species of Graptopetalum (Crassulaceae) and closely related genera. Graptopetalum is member of a group of taxa restricted to North America, one of the centers of diversity of Crassulaceae; however, their phylogenetic relationships are not yet understood. Nineteen species of Graptopetalum and 24 species from nine other genera of Crassulaceae were sampled for use in three separate parsimony analyses: ITS alone, ETS alone, and a combined nuclear + plastid DNA analysis using all four gene regions. The ETS data set had the highest number of parsimony-informative sites, about 30% more than in ITS, but the most fully resolved tree resulted when the four DNA regions were combined. Only four subclades of the tree received moderate to strong bootstrap support, one of which includes all species of Graptopetalum having a single whorl of stamens. However, Graptopetalum is not monophyletic. Instead, Tacitus bellus and select species of Cremnophila, Sedum, and Echeveria are interspersed among species of Graptopetalum and show evidence of grouping according to geographical range of distribution more so than habit or floral morphology MH - Mexico|Jalisco MH - Mexico|Veracruz MH - USA PB - COLUMBUS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000222964400009 L2 - Crassulaceae;ETS;Graptopetalum;ITS;molecular;rpl16;succulents;trnL-F;NONCODING REGIONS; CHLOROPLAST DNA; EVOLUTION; CHARACTERS; NUCLEAR; TAXA SO - American Journal of Botany 2004 ;91(7):1099-1104 10413 UI - 5395 AU - ceves-Avila FJ AU - Ferrari R AU - Ramos-Remus C AD - Univ Alberta, Dept Med, Edmonton, AB T6G 2B7, CanadaCtr Med Nacl Occidente, Inst Mexicano Seguro Social, Unidad Invest Enfermedades Cron Degenerat SC, Guadalajara, Jalisco, MexicoHosp Gen Reg 46, Inst Mexicano Seguro Social, Unidad Invest Enfermedades Cronico Degenerativas, Guadalajara, Jalisco, MexicoAceves-Avila, FJ, Colomos 2292,Col Providencia, Guadalajara 44620, Jalisco, Mexico TI - New insights into culture driven disorders AB - Rheumatologists frequently encounter patients whose illnesses lack face-value; that is, they lack the typical objective features of pathology that rheumatologists traditionally rely on for diagnosis and developing effective treatment approaches: namely fibromyalgia, chronic fatigue syndrome, Gulf War syndrome, chronic whiplash, chronic low back pain, etc. In this article, we examine this group of illnesses as culture-driven disorders to emphasize the central importance of various societal constraints in the ultimate presentation of patients with these illnesses. We will examine them by first understanding the purpose they serve, the underlying factors that compel societal institutions to sanctify these disorders as diseases, and how research is beginning to examine the behaviour that captures and packages these symptoms to produce their clinical presentation. With this research understanding, rheumatologists may be able to offer patients more useful action plans, but likely changes in societal approaches to the expressions of distress and changes in disability and compensation systems will also be required MH - Canada MH - Mexico|Jalisco PB - LONDON: BAILLIERE TINDALL RP - NOT IN FILE U3 - TC 6 U4 - Rheumatology U5 - J;Article AV - English IS - 1521-6942 UR - ISI:000221765200005 L2 - fibromyalgia;chronic fatigue syndrome;Gulf war syndrome;whiplash;chronic low back pain;silicon implant syndrome;environmental syndromes;LOW-BACK-PAIN; CHRONIC-FATIGUE-SYNDROME; FUNCTIONAL SOMATIC SYNDROMES; TENDER POINTS; PRIMARY-CARE; NECK PAIN; GULF-WAR; SYMPTOMS; FIBROMYALGIA; DISABILITY SO - Best Practice & Research in Clinical Rheumatology 2004 ;18(2):155-171 10414 UI - 4320 AU - ceves-Medina G AU - Jimenez-Rosenberg SPA AU - Hinojosa-Medina A AU - Funes-Rodriguez R AU - Saldierna-Martinez RJ AU - Smith PE AD - Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, BCS, MexicoNatl Marine Fisheries Serv, NOAA, SW Fisheries Sci Ctr, La Jolla, CA 92038, USASmith, PE, Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Apdo Post 592, La Paz 23000, BCS, Mexico TI - Fish larvae assemblages in the Gulf of California AB - The distributional diversity and assemblages of fish larvae in the Gulf of California indicated two main seasonal stages and two transitional periods: in winter, the tropical water mass is confined to the south-east portion of the mouth of the Gulf and larval fish assemblages are dominated by subtropical and temperate-subarctic species; in summer; tropical water invades the Gulf and assemblages are dominated by tropical species. Both seasonal stages are separated by transitional periods coinciding with strong latitudinal temperature gradients. During the autumn and spring transitional periods, the Gulf of California splits into three regions: a northern region where temperate and subarctic species spawn from autumn to spring, a southern region dominated by tropical and subtropical species year round and a central region where tropical and temperate assemblages merge. Seasonal changes in the location of the regions, as well as the borders between them, show expansion and contraction of the northern and southern faunas related to the general oceanic circulation patterns during the year. (C) 2004 The Fisheries Society of the British Isles MH - Mexico|Baja California Sur MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-1112 UR - ISI:000224008000015 L2 - fish larvae assemblages;Gulf of California;PACIFIC; AFFINITIES; ZONE SO - Journal of Fish Biology 2004 ;65(3):832-847 10415 UI - 4936 AU - Chaidez C AU - Gerba CP AD - Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721, USACtr Invest Alimentat & Desarrollo, Culiacan, MexicoGerba, CP, Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721 USA TI - Comparison of the microbiologic quality of point-of-use (POU)-treated water and tap water AB - Activated carbon filtration devices placed on household faucets are used to improve the taste and odour of tap water. However, there has been a concern that the growth of bacteria capable of causing opportunistic infections in these devices might present a public health risk. The water quality from point-of-use (POU) water activated carbon treatment devices and that of tap water with POU-connections and tap water without POU devices were compared. Heterotrophic plate count (HPC) bacteria, total and faecal coliforms, and acid-fast organisms (Mycobacteria spp.), as well as, the opportunistic bacterial pathogens Aeromonas hydrophila, Plesiomonas shigelloides, and Pseudomonas aeruginosa were enumerated. The highest concentration of bacteria was found in POU-treated water. P. aeruginosa, acid-fast organisms, and total coliforms were present in 38.5, 43.8, and 82.4% of the samples, respectively. HPC bacteria were present in all of the POU-treated water samples, with concentrations ranging from 10 2 to 10 7 colony forming units/mL. Neither faecal coliforms nor P. shigelloides were recovered from any samples. Tap water with a POU-connection also had higher numbers of bacteria than tap water samples. It was concluded that tap water without POU devices had lower numbers of A. hydrophila, acid-fast organisms, HPC bacteria, P. aeruginosa and coliforms than POU-treated water, and tap water with a POU-connection. The use of POU-devices may amplify the numbers of bacteria present in the tapwater by promoting biofilm formation. Based on a daily ingestion of two liters of POU treated water, A. hydrophila and P. aeruginosa had a probability of less than 1076 of colonizing the gut; however, annual risks could be as much as 100-fold greater MH - USA MH - Mexico|Sinaloa PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0960-3123 UR - ISI:000222627900002 L2 - point-of-use (POU) devices;drinking water;Aeromonas hydrophila;Pseudomonas aeruginosa;bacteria;heterotrophic bacteria;tap water;ACTIVATED CARBON FILTERS; BACTERIAL-COLONIZATION; DRINKING-WATER; PATHOGENS; DEVICES SO - International Journal of Environmental Health Research 2004 ;14(4):253-260 10416 UI - 6191 AU - Chandramohan R AU - Mahalingam T AU - Chu JP AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaNatl Taiwan Ocean Univ, Inst Mat Engn, Chilung 20224, TaiwanUNAM, CIE, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Preparation and characterization of semiconducting Zn1-xCdxSe thin films AB - The electrodeposition of Zn1-xCdxSe polycrystalline semiconducting thin films from aqueous acidic bath without any additives onto tin oxide-coated conducting glass and titanium substrates are described. The influence of deposition parameters on the film formation and deposition mechanism based on cyclic voltammetry is discussed. X-ray diffraction studies showed the polycrystalline wurtzite nature for all the films deposited under the proposed conditions. The optical studies revealed the band gap values in the range between 2.82 and 1.72eV as the film composition changes from ZnSe to CdSe. It has been observed that the concentration of cadmium salt plays an essential role on the alloy formation. The surface morphological studies and composition analysis were carried out and the results are discussed. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Taiwan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000189082200009 L2 - Zn1-xCdxSe;thin film;Electrodeposition;voltammetry;optical properties;SOLAR-CELL; ELECTRODEPOSITION; CDSE SO - Solar Energy Materials and Solar Cells 2004 ;81(3):371-378 10417 UI - 3056 AU - Chanona J AU - Garcia M AU - Ruvaicaba L AU - Bermudez A AU - Beltran A AU - Cuneo S AD - Inst Mexicano Infertilidad, Guadalajara, SpainHosp Angeles Pedregal, Mexico City, DF, Mexico TI - The use of vaginal sildanefil in patients with poor endometrial response: The Mexican IVF experience MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000224010800511 SO - Fertility and Sterility 2004 ;82():S197-S198 10418 UI - 3972 AU - Chapellier E AU - Mathias P AU - Garrido R AU - Le Contel JM AU - Sareyan JP AU - Ribas I AU - Parrao L AU - Moya A AU - Pena JH AU - Alvarez M AD - Observ Cote Azur, Dept GEMINI, UMR 6203, F-06304 Nice 4, FranceInst Astrofis Andalucia, E-18080 Granada, SpainUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainUNAM, Inst Astron, Ensenada, Baja California, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoChapellier, E, Observ Cote Azur, Dept GEMINI, UMR 6203, BP 4229, F-06304 Nice 4, France TI - HD 173977: An ellipsoidal delta Scuti star variable AB - We present spectroscopic and photometric observations of the star HD173977. It appears that the star is part of a double line binary system, with a period of 1.801 d, corresponding to twice the period of the photometric variations. Hence the star is an ellipsoidal variable. The system is probably synchronized. The physical parameters of both components were derived through two independant methods, one based on evolutionary tracks, the other being the result of the behaviour of light curves in a close binary system. After removing the ellipsoidal variations, 3 frequencies are detected in the photometric data: 8.56, 14.51 and 16.42 d(-1), while 2 additional frequencies are also possible: 10.96 and 12.11 d(-1). In accordance with its position in the HR diagram, the primary component of HD173977 should be considered as a delta Scuti star and no longer as a gamma Doradus star. In addition, HD173844, used as a check star, is discovered variable with a 15.79 d(-1) frequency and is classified as a delta Scuti star MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000224965300028 L2 - stars : binaries : general;stars : oscillations;techniques : photometric;techniques : spectroscopic;stars : variables : delta Sct;GAMMA-DORADUS CANDIDATES SO - Astronomy & Astrophysics 2004 ;426(1):247-252 10419 UI - 3981 AU - Charatonik JJ AU - Illanes A AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Wroclaw, Inst Math, PL-50384 Wroclaw, PolandCharatonik, JJ, Univ Nacl Autonoma Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Mappings on dendrites AB - The existence of a point of order omega in dendrites with finitely many branch points is characterized in terms of self-mappings on such dendrites. Also in these terms conditions are found under which dendrites without points of order omega have infinitely many branch points. Structure of dendrites having the OmegaEP-property (for each self-mapping f the set of nonwandering points of f is contained in the closure of the set of eventually periodic points of f) is characterized by noncontaining of a special dendrite W. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000224713600006 L2 - continuum;dendrite;mapping;nonwandering point;periodic point;CONTINUOUS-MAPS; END-POINTS; INTERVAL; DEPTH; SET SO - Topology and Its Applications 2004 ;144(1-3):109-132 10420 UI - 4142 AU - Charatonik JJ AU - Charatonik WZ AU - Prajs JR AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUniv Missouri, Dept Math & Stat, Rolla, MO 65409, USAUniv Opole, Inst Math, PL-45052 Opole, PolandCharatonik, JJ, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Atriodic absolute retracts for hereditarily unicoherent continua AB - Let X be an absolute retract for the class of hereditarily unicoherent continua that contains no simple triod. In this paper we prove that (a) X is atriodic, (b) X is either an arc or an indecomposable continuum having only arcs as its proper subcontinua; (c) if X is either tree-like or circle-like, then it is arc-like MH - Mexico|Distrito Federal MH - Poland MH - USA PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000224587700009 L2 - absolute retract;arc approximation property;arc component;arc property of Kelley;continuum;dendroid;hereditarily unicoherent;property of Kelley;retraction;simple triod;PROPERTY SO - Houston Journal of Mathematics 2004 ;30(4):1069-1087 10421 UI - 5319 AU - Charatonik JJ AU - Charatonik WJ AU - Prajs JR AD - Natl Autonomous Univ Mexico, Inst Matemat, Circuito Exterior, Mexico City 04510, DF, MexicoUniv Missouri, Dept Math & Stat, Rolla, MO 65409, USACalif State Univ Sacramento, Dept Math & Stat, Sacramento, CA 95819, USACharatonik, JJ, Natl Autonomous Univ Mexico, Inst Matemat, Circuito Exterior, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Hereditarily unicoherent continua and their absolute retracts AB - We investigate absolute retracts for classes of hereditarily unicoherent continua, tree-like continua, lambda-dendroids, dendroids and some other related ones. The main results are: (1) the inverse limits of trees with confluent bonding mappings are absolute retracts of hereditarily unicoherent continua; (2) each tree-like continuum is embeddable in a special way in a tree-like absolute retract for the class of hereditarily unicoherent continua; (3) a dendroid is an absolute retract for hereditarily unicoherent continua if and only if it can be embedded as a retract into the Mohler-Nikiel universal smooth dendroid MH - Mexico|Distrito Federal MH - USA PB - TEMPE: ROCKY MT MATH CONSORTIUM RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0035-7596 UR - ISI:000221861800006 L2 - absolute retract;arc approximation property;arc component;are property of Kelley;confluent;continuum;decomposable;dendroid;hereditarily unicoherent;property of Kelley;retraction;tree tree-like;unionable;INVERSE LIMITS; CONFLUENT MAPPINGS; BONDING MAPS; DENDROIDS; PROPERTY; ARC SO - Rocky Mountain Journal of Mathematics 2004 ;34(1):83-110 10422 UI - 6247 AU - Charatonik JJ AU - Krupski P AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Wroclaw, Inst Math, PL-50384 Wroclaw, PolandCharatonik, JJ, Natl Autonomous Univ Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Dendrites and light mappings AB - It is shown that a metric continuum X is a dendrite if and only if for every compact space (continuum) Y and for every light confluent mapping f:Y-->f(Y) such that X subset of f(Y) there is a copy X' of X in Y for which the restriction f\X':X'-->X is a homeomorphism. As a corollary it follows that only dendrites have the lifting property with respect to light confluent mappings. Other classes of mappings f are also discussed. This is a continuation of a previous study by the authors (2000), where open mappings f were considered MH - Mexico|Distrito Federal MH - Poland PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000188859400035 L2 - confluent;continuum;dendrite;lifting;light;mapping;open;CONFLUENT MAPPINGS SO - Proceedings of the American Mathematical Society 2004 ;132(4):1211-1217 10423 UI - 4704 AU - Chassin-Noria O AU - breu-Grobois A AU - Dutton PH AU - Oyama K AD - UNAM, Ctr Invest Ecosist, Antigua Carretera Patzuaro 8071, Morelia, Michoacan, MexicoUNAM, Inst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan, Sinaloa, MexicoNatl Marine Fisheries Serv, SW Fisheries Sci Ctr, NOAA, La Jolla, CA 92038, USAChassin-Noria, O, UNAM, Ctr Invest Ecosist, Antigua Carretera Patzuaro 8071, Colonia Ex Hacienda San Jose Huerta,CP 58190, Morelia, Michoacan, Mexico TI - Conservation genetics of the east Pacific green turtle (Chelonia mydas) in Michoacan, Mexico AB - The main continental nesting rookeries of the east Pacific green turtle (EPGT), Chelonia mydas, on the Michoacan (Mexico) coast suffered drastic population declines following intense exploitation in the 1960s-1970s with annual abundance of nesting females plummeting from about 25,000 to an average of about 1400 between 1982 and 2001. Analyses of data from three nDNA microsatellite loci and 400 bp mtDNA control region sequences from a total of 123 nesting females sampled from four Michoacan rookeries found no evidence of population sub-structuring. The recent order of magnitude reduction in the population size shows no apparent impact on genetic diversity in either control region sequences (overall h = 0.48; pi = 0.0036) or microsatellite loci (overall N-a = 20.8; H-exp = 0.895). Our estimates of annual effective female population size (N-ef; from theta = 2Nemu) of 1.9-2.3 x 10(3), in spite of being an order of magnitude below historical records, appear to be sufficient to allow recovery of this population without significant loss of genetic diversity. These findings highlight the importance of continued conservation to reverse the decline of this population before it becomes vulnerable to genetic erosion MH - Mexico|Michoacan MH - Mexico|Sinaloa MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0016-6707 UR - ISI:000223204200010 L2 - black turtle;Chelonia mydas;east Pacific green turtle;effective population size;genetic diversity;genetic structure;microsatellites;mitochondrial DNA;MITOCHONDRIAL-DNA; MARINE TURTLES; POPULATION-STRUCTURE; GLOBAL PHYLOGEOGRAPHY; DERMOCHELYS-CORIACEA; MOLECULAR PHYLOGENY; SEQUENCE DIVERSITY; LEATHERBACK TURTLE; CARETTA-CARETTA; TRANSFER-RNA SO - Genetica 2004 ;121(2):195-206 10424 UI - 6177 AU - Chatterjee TK AU - Magalinsky VB AD - Puebla Univ, Puebla, MexicoUniv Friendship Peoples, Moscow, RussiaChatterjee, TK, Puebla Univ, Puebla, Mexico TI - The parameterization of the ground state and its applications to planetary systems AB - Natural systems tend to minimize their energy. Hence an important problem in astrophysics is the parametrization of the ground state. In this context a quantum statistical approach is very useful. The problem of the variational approximation of the density matrix is extended towards a parametrization of the ground state. With an analogy to the semiclassical approach, a classical approach to the variational principle in the parametrization of the ground state is elucidated and its applications are discussed. We find that planetary systems tend to have circular orbits in an effort to attain the ground state. The results of this paper may be useful for the modern problem of detecting planets around bright stars MH - Mexico|Puebla MH - Russia PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0571-7256 UR - ISI:000189207600012 L2 - planetary systems;PULSARS SO - Astrophysics 2004 ;47(1):117-123 10425 UI - 3704 AU - Chavarria JC AU - Ramirez J AU - Gonzalez H AU - Baltanas MA AD - UNAM, Dept Ingn Quim, Fac Quim, Mexico City, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Michoacana, Fac Ingn Quim, Morelia, Michoacan, MexicoConsejo Nacl Invest Cient & Tecn, UNL, INTEC, RA-34503000 Guemes, Santa Fe, ArgentinaRamirez, J, UNAM, Dept Ingn Quim, Fac Quim, Cd Univ, Mexico City, DF, Mexico TI - Modelling of n-hexadecane hydroisomerization and hydrocracking reactions on a Mo/H beta-alumina Bi-functional catalyst, using the single event concept AB - Hydrocracking of a long chain paraffin, hexadecane, was carried out on a Mo/Hbeta-alumina bi-functional catalyst with a weak dehydrogenating function. It was found through an isomerization selectivity analysis that the behavior of the system is away from ideal hydrocracking conditions. To implement for this system the single event concept, until now applied only to systems for which the ideal hydrocracking assumption was valid, a hybrid model that includes the more general case in which reactions on the acid sites are not rate determining was developed. This model was called the single-event-lumped-parameter hybrid (SELPH) model, for it considers fundamental rate constants for the reactions that take place on the acid sites using the single event concept, and lumped rate constants for the reactions on the metal sites. The kinetic coefficients at 533 K were estimated and the agreement between the calculated and experimental data was satisfactory. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000225613500027 L2 - hydrocracking;bifuncional catalyst;modeling;single events;kinetic;KINETIC-MODEL; RATE PARAMETERS; NORMAL-DODECANE; NORMAL-DECANE; CRACKING; OIL; PARAFFINS; ZEOLITE; REACTOR SO - Catalysis Today 2004 ;98(1-2):235-242 10426 UI - 2993 AU - Chavez-Lopez MA AU - Navarro-Soltero LA AU - Naredo E AU - Gallaga A AU - Huerta-Yanez G AU - valos-Romero E AU - Rosas-Cabral A AD - Hosp Miguel Hidalgo, Aguascalientes, MexicoHosp Severo Ochoa, Madrid, Spain TI - Methilprednisolone vs triamcinolone in painful shoulder using ultrasound-guided injection: A randomized, prospective, double-blind study MH - Mexico|Aguascalientes MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551500816 SO - Annals of the Rheumatic Diseases 2004 ;63():243-243 10427 UI - 4784 AU - Chavez E AU - Dobrev S AU - Kranakis E AU - Opatrny J AU - Stacho L AU - Urrutia J AD - Univ Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaCarleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaConcordia Univ, Dept Comp Sci, Montreal, PQ H3G 1M8, CanadaSimon Fraser Univ, Dept Math, Burnaby, BC V5A 1S6, CanadaNatl Autonomous Univ Mexico, Inst Matemat, Area Invest Cient, Mexico City 04510, DF, Mexico TI - Route discovery with constant memory in oriented planar geometric networks AB - We address the problem of discovering routes in strongly connected planar geometric networks with directed links. We consider two types of directed planar geometric networks: Eulerian (in which every vertex has the same number of ingoing and outgoing edges) and outer-planar (in which a single face contains all the vertices of the network). Motivated by the necessity for establishing communication in wireless networking based only on geographic proximity, in both instances we give algorithms that use only information that is geographically local to the vertices participating in the route discovery MH - Canada MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000222866800014 SO - Algorithmic Aspects of Wireless Sensor Networks 2004 ;3121():147-156 10428 UI - 5412 AU - Chavez E AU - Figueroa K AD - Univ Michoacana, Morelia, Michoacan, Mexico. Univ Chile, DCC, Santiago, Chile TI - Faster proximity searching in metric data AB - A number of problems in computer science can be solved efficiently with the so called memory based or kernel methods. Among this problems (relevant to the AI community) are multimedia indexing, clustering, non supervised learning and recommendation systems. The common ground to this problems is satisfying proximity queries with an abstract metric database. In this paper we introduce a new technique for making practical indexes for metric range queries. This technique improves existing algorithm based on pivots and signatures, and introduce a new data structure, the Fixed Queries Trie to speedup metric range queries. The result is an O(n) construction time index, with query complexity O(n(alpha)), alpha less than or equal to 1. The indexing algorithm uses only a few bits of storage for each database element MH - Chile MH - Mexico|Michoacan T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleelchavez@fismat.umich.mx karina@fismat.umich.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600023 SO - 2004 ;():222-231 10429 UI - 3830 AU - Chavez MD AU - de Pablo L AU - de Pablo JJ AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USAde Pablo, L, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Monte Carlo molecular simulation of the hydration of K-Montmorillonite at 353 K and 625 bar AB - Monte Carlo molecular simulations of the hydration of K-saturated Wyoming-type montmorillonite at constant stress in the NPzzT ensemble and at constant chemical potential in the grand canonical muVT ensemble, under basin-like conditions of 353 K and 625 bar, show a strong tendency of the K+ ions to adhere to the siloxane surface, forming predominant inner-sphere complexes with tetrahedral oxygen atoms and adsorbed water molecules. Simulations in the grand canonical ensemble predict that none of the K-montmorillonite hydrates, the one-, two-, and three-layer hydrates, are stable in this environment of high depth, temperature, and pressure. The most nearly stable configuration corresponds to the one-layer hydrate, characterized by a d(001) spacing of 12.75 Angstrom, the adsorbed water being 60 molecules/layer or 180.83 mg of H2O/g of clay, an internal energy of -22.73 kcal/mol, an interlayer density of 0.365 g/mL, and a pressure tensor, P-zz, of 1999.9 bar. The interlayer structure consists of two close layers of water molecules 0.50 Angstrom from the midplane, with broad shoulders on the sides, the protons oriented toward the midplane and the siloxane surfaces, and the K+ ions close to the clay surfaces and on the interlayer midplane MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000225207400057 L2 - SWELLING CLAY-MINERALS; CA-MONTMORILLONITE; COMPUTER-SIMULATION; ELEVATED PRESSURES; LAYER CHARGE; WATER-VAPOR; HOMOIONIC MONTMORILLONITE; EXCHANGED MONTMORILLONITE; STATISTICAL-MECHANICS; NA-MONTMORILLONITE SO - Langmuir 2004 ;20(24):10764-10770 10430 UI - 5610 AU - Chazaro-Olvera S AU - Peterson MS AD - Univ Nacl Autonoma Mexico, Ecol Lab, Tlalnepantla 54090, Estado De Mexic, MexicoUniv So Mississippi, Dept Coastal Sci, Ocean Springs, MS 39564, USAChazaro-Olvera, S, Univ Nacl Autonoma Mexico, Ecol Lab, Campus Iztacala,Ave Barrios S-N,Apartado Postal 3, Tlalnepantla 54090, Estado De Mexic, Mexico TI - Effects of salinity on growth and molting of sympatric Callinectes spp. from Camaronera Lagoon, Veracruz, Mexico AB - Megalopae of Callinectes rathbunae Contrareras, 1930 and C. sapidus Rathbun, 1896 were exposed to salinities of 5, 15, and 25 at 25.0degreesC (through crab stage 16) to determine if there were species-specific differences in survival, growth, and intermolt duration. Survival of C. rathbunae decreased significantly at higher salinities, but there was no salinity effect for C. sapidus. Callinectes rathbunae had significantly higher survival than C. sapidus in salinities of 5 and 15, but survival was not different in a salinity of 25. There was no difference in survival of C. rathbunae by gender; survival of both genders was generally lowest at a salinity of 25. There was no difference in survival for females of C. sapidus among salinities, but mates had lowest survival at the lowest salinity. Additionally, males had significantly greater survival than females in salinities of 15 and 25. Females of C. rathbunae grew faster than males at all salinities and both genders grew fastest in a salinity of 15. In contrast, males and females of C. sapidus grew at the same rate, with the lowest growth rate for both genders at the lowest salinities. Relative to C rathbunae, C. sapidus had a significantly higher growth rate and shorter intermolt duration at the highest salinity. There was no significant difference in intermolt duration between genders for C. rathbunae or C. sapidus. However, intermolt duration among salinity treatments for C. rathbunae differed significantly in crabs greater than or equal to stage 7, with the longest duration in the highest salinity. In contrast, intermolt duration of C. sapidus was shortest in a salinity of 25. Results of this study suggest that C. rathbunae is more tolerant of low salinity habitats than C. sapidus MH - Mexico|Estado De Mexico MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000221161900009 L2 - JUVENILE BLUE CRABS; GULF-OF-MEXICO; SAPIDUS RATHBUN; LARVAL DEVELOPMENT; GENUS CALLINECTES; SWIMMING CRABS; SEAGRASS BEDS; TIDAL MARSH; HABITAT; SIMILIS SO - Bulletin of Marine Science 2004 ;74(1):115-127 10431 UI - 4030 AU - Chebabe D AU - Chikh ZA AU - Dermaj A AU - Rhattas K AU - Jazouli T AU - Hajjaji N AU - El Mdari F AU - Srhiri A AD - Fac Sci, Organ Synth & React Lab, Mexico City 14000, DF, MexicoFac Sci, Electrochem Lab, Kenitra 14000, MoroccoChebabe, D, Fac Sci, Organ Synth & React Lab, BP 133, Mexico City 14000, DF, Mexico TI - Synthesis of bolaamphiphile surfactants and their inhibitive effect on carbon steel corrosion in hydrochloric acid medium AB - Corrosion inhibition by surfactant molecules is related to the surfactant's ability to aggregate at interfaces and in solution. In this work some new triazole bolaamphiphiles in the series of l,n-bis(1,2,4-triazolyl)alkane where n = 10, 12 have been synthesized. The purity of surfactants synthesized was checked by rutinary methodologies (IR, H-1 NMR, C-13 NMR, mass spectra and elemental analysis). The aggregation of l,n-bis(l,2,4-triazolyl)alkane have been determined by surface tension at the air-HCl 1 M interface. The inhibiting action of these compounds towards the corrosion of carbon steel in 1 M HCl solution was investigated using gravimetric, potentiodynamic and electrochemical impedance spectroscopy measurements. Polarization data indicate that these compounds act as very good cathodic inhibitors for carbon steel in 1 M HCl. The values of the transfer resistance, obtained from impedance plots of carbon steel, increase by increasing product concentration. From all measurements carried out, the variation of the inhibition efficiency versus concentration shows the same trend. The electrochemical study shows that DTC12 is the best inhibitor and its efficiency increases with concentration and the highest value obtained is around 94%. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Morocco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000224789300007 L2 - bolaamphiphile;surfactant;inhibition;carbon steel;1M HC1;surface tension;aggregation;IRON SO - Corrosion Science 2004 ;46(11):2701-2713 10432 UI - 3998 AU - Chen CL AU - Macarie H AU - Ramirez I AU - Olmos A AU - Ong SL AU - Monroy O AU - Liu WT AD - Natl Univ Singapore, Dept Civil Engn, Singapore 117576, SingaporeUniv Provence & Mediterranee, Microbiol Lab, IRD Ex ORSTOM, ESIL, F-13288 Marseille 09, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoChen, CL, Natl Univ Singapore, Dept Civil Engn, Blk E1A,07-03,Engn Dr 2, Singapore 117576, Singapore TI - Microbial community structure in a thermophilic anaerobic hybrid reactor degrading terephthalate AB - A thermophilic terephthalate-degrading methanogenic consortium was successfully enriched for 272 days in an anaerobic hybrid reactor, and the microbial structure was characterized using terminal RFLPs, clone libraries and fluorescence in-situ hybridization with rRNA-targeted oligonucleotide probes. All the results suggested that Methanothrix thermophila-related methanogens, Desulfotomaculum-related bacterial populations in the Gram-positive low-G + C group, and OP5-related populations were the key members responsible for terephthalate degradation under thermophilic methanogenic conditions except during periods when the reactor experienced heat shock and pump failure. These perturbations caused a significant shift in bacterial population structure in sludge samples taken from the sludge bed but not from the surface of the packing materials. After system recovery, many other bacterial populations emerged, which belonged mainly to the Gram-positive low-G + C group and Cytophaga-Flexibacter-Bacteroides, as well as beta-Proteobacteria, Planctomycetes and Nitrospira. These newly emerged populations were probably also capable of degrading terephthalate in the hybrid system, but were out-competed by those bacterial populations before perturbations MH - France MH - Mexico|Distrito Federal MH - Singapore PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000224695800034 L2 - 16S RIBOSOMAL-RNA; SULFATE-REDUCING BACTERIA; WASTE-WATER TREATMENT; OLIGONUCLEOTIDE PROBES; HYBRIDIZATION PROBES; DIVERSITY; ACID; IDENTIFICATION; ENVIRONMENT; SEQUENCES SO - Microbiology-Sgm 2004 ;150():3429-3440 10433 UI - 4126 AU - Chen CX AU - Gao YH AD - E China Shipbuilding Inst, Sch Mat Sci & Engn, Dept Chem, Zhenjiang 212003, Peoples R ChinaChen, CX, Inst Nacl Cardiol Ignacio Chavez, Nucl Cardiol Dept, Juan Badiano 1,Col Secc XVI, Mexico City 14080, DF, Mexico TI - Electrochemical polymerization of azure B in H2SO4 solution and properties of poly(azure B) AB - The electrochemical polymerization of azure B on a platinum foil has been carried out using cyclic voltammetry in the potential region of 0 and 1.4 V (vs. SCE). The electrolytic solution consisted of 5.0 mmol dm(-3) azure B and 0.3 mol dm(-3) H2SO4. The temperature for polymerization was controlled at 20 degreesC. Poly(azure B) is a blue material. Poly(azure B) film has a electrochemical reversibility, stability and a fast charge transfer ability in the solution of 0.5 mol dm(-3) Na2SO4 with pH less than or equal to 4.0. The UV-visible spectra of poly(azure B) are different from those of azure B. (C) 2004 Published by Elsevier B.V MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000224449500003 L2 - azure B;electrochemical polymerization;electrochemical properties;UV-visible spectra;POLYANILINE SO - Materials Letters 2004 ;58(27-28):3385-3387 10434 UI - 4901 AU - Cherpitel CJ AU - Borges GLG AU - Wilcox HC AD - Alcohol Res Grp, Natl Alcohol Res Ctr, Berkeley, CA 94709, USAUniv Autonoma Metropolitana Xochimilco, Col San Lorenzo Huipulco, MexicoInst Nacl Psiquiatria, Col San Lorenzo Huipulco, MexicoJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mental Hyg, Baltimore, MD, USACherpitel, CJ, Alcohol Res Grp, Natl Alcohol Res Ctr, 2000 Hearst Ave, Berkeley, CA 94709 USA TI - Acute alcohol use and suicidal behavior: A review of the literature AB - Background: Both acute and chronic use of alcohol are associated with suicidal behavior. However, the differing relationship of each component of alcohol use and possible causal mechanisms remain unclear. Methods: This article reviews and summarizes associations between acute alcohol consumption (with and without intoxication) and suicidal behavior (both completed suicide and suicide attempts) among adults 19 years and older, as presented in literature published between 1991 and 2001. Possible mechanisms and methodologic challenges for evaluating the association are also discussed. An application of a research design (the case-crossover study) that has the potential for addressing the effects of acute alcohol use over and above usual or chronic use is presented. Results: The majority of articles reviewed were restricted to descriptive studies that documented the prevalence of suicide completers or attempters who tested positive for alcohol use. A wide range of alcohol-positive cases were found for both completed suicide (10-69%) and suicide attempts (10-73%). Common methodologic limitations included the lack of control groups (for evaluating risk conferred by alcohol use), selection and ascertainment bias, and small sample sizes. The results of the case-crossover pilot study indicated substantially higher risk of suicide during or shortly after use of alcohol compared with alcohol-free periods. Conclusions: Although there is a substantial literature of published studies on acute alcohol use and suicidal behavior, the majority of studies focus on completed suicide and report prevalence estimates. Findings from such studies are subject to several possible sources of bias and have not advanced our knowledge of mechanisms in the association between acute alcohol use and suicidal behavior. The case-crossover design may help to overcome some limitations of these studies and facilitate evaluation of associations and possible causal mechanisms by which acute alcohol use is linked to suicidal behavior MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 18 U4 - Substance Abuse U5 - J;Article AV - English IS - 0145-6008 UR - ISI:000222820900004 L2 - acute alcohol use;suicide;attempted suicide;risk factors;case-crossover study;CASE-CROSSOVER DESIGN; UNNATURAL DEATHS; TRAUMA PATIENTS; FATAL INJURY; CONSUMPTION; PREVALENCE; PREVENTION; VICTIMS; SWEDEN; COUNTY SO - Alcoholism-Clinical and Experimental Research 2004 ;28(5):18S-28S 10435 UI - 5524 AU - Cherpitel CJ AU - Borges G AD - Inst Publ Hlth, Alcohol Res Grp, Berkeley, CA 94709, USAUniv Autonoma Metropolitana Xochimilco, Inst Nacl Psiquiatria, Mexico City 10610, DF, MexicoCherpitel, CJ, Inst Publ Hlth, Alcohol Res Grp, 2000 Hearst Ave, Berkeley, CA 94709 USA TI - Screening for drug use disorders in the emergency department: performance of the rapid drug problems screen (RDPS) AB - Little research is available on brief screening instruments for identify those meeting diagnostic criteria for drug dependence or abuse. A brief, four-item screening instrument, called the rapid drug problems screen (RDPS), was developed from a similar instrument for alcohol use disorders, the rapid alcohol problems screen (RAPS). Performance of the RDPS was evaluated against DSM-IV and ICD-10 criteria for drug dependence and for dependence or abuse in a sample of 703 emergency department patients in Mexico City. Among males, sensitivity and specificity were 91 and 96%, respectively, for dependence and 93 and 96%, respectively, for dependence or abuse. Neither of the two females meeting diagnostic criteria for dependence or abuse were identified by the RDPS. Area under the receiver-operating characteristic curve indicates an optimum cut point of 1. The data suggest that the RDPS may hold promise as a brief screening instrument for substance use among males, but should be tested in larger populations of females meeting diagnostic criteria for drug use disorders, and across ethnic subgroups in other geographic locales. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 6 U4 - Substance Abuse;Psychiatry U5 - J;Article AV - English IS - 0376-8716 UR - ISI:000221371700006 L2 - drug dependence;drug abuse;screening;emergency department;Mexico;ALCOHOL-USE DISORDERS; TRAUMA CENTER; PSYCHOMETRIC PROPERTIES; SUBSTANCE-ABUSE; UNITED-STATES; DEPENDENCE; ROOM; DRINKING; INJURY; RAPS4 SO - Drug and Alcohol Dependence 2004 ;74(2):171-175 10436 UI - 6243 AU - Chinas-Castillo F AU - Spikes HA AD - Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, Tribol Sect, London, EnglandInst Tecnol Oaxaca, Dept Mech Engn, Oaxaca, MexicoSpikes, HA, Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, Tribol Sect, London, England TI - The behavior of diluted sooted oils in lubricated contacts AB - An increase in the engine lubricant soot levels has recently been noticed. This increase in soot content of lubricating oils has caused a series of problems in the overall performance of the engine. In a practical context, sooted oils consist of carbonaceous matter suspended in engine oil forming a system commonly known as a colloid sol. The objective of this paper is to better understand the mechanism of action of oil containing soot particles in the lubricated contacts and to identify how the colloidal nature of the sooted oil is related to its performance. This study has shown by means of ultra-thin film interferometry and image analysis techniques that soot colloid particles are entrained in the contact inlet where they can influence the friction and wear characteristics of the base stock. This study shows that soot primary particles are entrained into the contact at slow speeds, affecting the film characteristics of clean engine oils. This entrainment of particles is more pronounced at high temperatures MH - United Kingdom MH - Mexico|Oaxaca PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Chemical;Engineering, Mechanical U5 - J;Article AV - English IS - 1023-8883 UR - ISI:000188856100011 L2 - elastohydrodynamic lubrication;soot;colloids;diesel engines;nanoparticles;sol;ENGINE; WEAR SO - Tribology Letters 2004 ;16(4):317-322 10437 UI - 3394 AU - Christen JA AU - Muller P AU - Wathen K AU - Wolf J AD - Ctr Invest Matemat, Guanajuato, MexicoMDACC, Dept Biostat, Houston, TX 77030, USAMDACC, Dept Gynecol Oncol, Houston, TX 77030, USAChristen, JA, Ctr Invest Matemat, Guanajuato, Mexico TI - Bayesian randomized clinical trials: a decision-theoretic sequential design AB - The authors propose a Bayesian decision-theoretic framework justifying randomization in clinical trials. Noting that the decision maker is often unable or unwilling to specify a unique utility function, they develop a sequential myopic design that includes randomization justified by the consideration of a set of utility functions. Randomization is introduced over all nondominated treatments, allowing for interim removal of treatments and early stopping. The authors illustrate their approach in the context of a study to find the optimal dose of pegylated interferon for platinum resistant ovarian cancer. They also develop an algorithm to implement their methodology in a phase II clinical trial comparing several competing experimental treatments MH - Mexico|Guanajuato MH - USA PB - OTTAWA: CANADIAN JOURNAL STATISTICS RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0319-5724 UR - ISI:000226504300005 L2 - backward induction;clinical trials;robustness;utility functions;MULTIPLE OUTCOMES SO - Canadian Journal of Statistics-Revue Canadienne de Statistique 2004 ;32(4):387-402 10438 UI - 6236 AU - Churg A AU - Myers J AU - Suarez T AU - Gaxiola M AU - Estrada A AU - Mejia M AU - Selman M AD - Inst Nacl Enfermedaeds Resp, Mexico City 14080, DF, MexicoUniv British Columbia, Dept Pathol, Vancouver, BC V5Z 1M9, CanadaMayo Clin, Dept Pathol, Rochester, MN, USASelman, M, Inst Nacl Enfermedaeds Resp, Tlalpan 4502,Col Secc XVI, Mexico City 14080, DF, Mexico TI - Airway-centered interstitial fibrosis - A distinct form of aggressive diffuse lung disease AB - We describe 12 patients with a form of interstitial lung disease characterized pathologically by small airway-centered interstitial fibrosis and metaplastic bronchiolar epithelium extending around and often linking fibrotic and sometimes heavily muscularized bronchioles. Clinically, patients presented with chronic cough and progressive dyspnea. One was a current light smoker and two were ex-smokers. In 8 patients, a history of possible inhalational exposures, including wood smoke, birds, cotton, pasture, chalk dust, agrochemical compounds, and cocaine use, was elicited. Pulmonary function tests showed moderate to severe physiologic abnormalities, in most instances indicating a restrictive lung disease with decreased peripheral flow rates. Chest radiographs revealed predominantly diffuse reticulonodular infiltrates in the central lung fields, with thickening of the bronchial walls and decreased lung volumes. Chest computed tomography demonstrated peribronchovascular fibrosis and interstitial thickening. Bronchoalveolar lavage showed a mild increase in lymphocytes in 4 subjects. Patients were treated with corticosteroids and bronchodilators. Follow-up data were available in 10 patients. In 5 patients, the disease progressed and 4 of them died. Two patients remained stable and 3 improved or healed. We propose that these findings represent a distinct airway-centered disease that mostly behaves as an interstitial lung disease and may exhibit a poor outcome MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 11 U4 - Pathology;Surgery U5 - J;Article AV - English IS - 0147-5185 UR - ISI:000188975400006 L2 - bronchiolitis;interstitial lung disease;small airway disease;fibrosis;IDIOPATHIC PULMONARY FIBROSIS; HYPERSENSITIVITY PNEUMONITIS; BRONCHIOLITIS SO - American Journal of Surgical Pathology 2004 ;28(1):62-68 10439 UI - 3247 AU - Ciria HC AU - Quevedo MS AU - Cabrales LB AU - Bruzon RP AU - Salas MF AU - Pena OG AU - Gonzalez TR AU - Lopez DS AU - Flores JM AD - Univ Oriente, Ctr Nacl Electromagnetismo Aplicado, Dept Bioingn & Equipos, Secc Bioelect, Santiago de Cuba 90400, CubaHosp Oncol Docente Prov Conrado Benitez, Santiago de Cuba 90100, CubaHosp Prov Clin Quirurg Docente Saturnino Lora, Dept Inmunol, Santiago de Cuba 90500, CubaHosp Infantil Norte Docente Juan Martinez Cruz Ma, Santiago de Cuba, CubaDirecc Municipal Salud Publ, Santiago de Cuba, CubaUniv Sonora, Dept Invest Fis, Hermosillo 83190, Sonora, MexicoCiria, HC, Univ Oriente, Ctr Nacl Electromagnetismo Aplicado, Dept Bioingn & Equipos, Secc Bioelect, Santiago de Cuba 90400, Cuba TI - Antitumor effectiveness of different amounts of electrical charge in Ehrlich and fibrosarcoma Sa-37 tumors AB - Background: In vivo studies were conducted to quantify the effectiveness of low-level direct electric current for different amounts of electrical charge and the survival rate in fibrosarcoma Sa-37 and Ehrlich tumors, also the effect of direct electric in Ehrlich tumor was evaluate through the measurements of tumor volume and the peritumoral and tumoral findings. Methods: BALB/c male mice, 7-8 week old and 20-22 g weight were used. Ehrlich and fibrosarcoma Sa-37 cell lines, growing in BALB/c mice. Solid and subcutaneous Ehrlich and fibrosarcoma Sa-37 tumors, located dorsolaterally in animals, were initiated by the inoculation of 5x10(6) and 1x10(5) viable tumor cells, respectively. For each type of tumor four groups (one control group and three treated groups) consisting of 10 mice randomly divided were formed. When the tumors reached approximately 0.5 cm(3), four platinum electrodes were inserted into their bases. The electric charge delivered to the tumors was varied in the range of 5.5 to 110 C/cm(3) for a constant time of 45 minutes. An additional experiment was performed in BALB/c male mice bearing Ehrlich tumor to examine from a histolological point of view the effects of direct electric current. A control group and a treated group with 77 C/cm(3) (27.0 C in 0.35 cm(3)) and 10 mA for 45 min were formed. In this experiment when the tumor volumes reached 0.35 cm(3), two anodes and two cathodes were inserted into the base perpendicular to the tumor long axis. Results: Significant tumor growth delay and survival rate were achieved after electrotherapy and both were dependent on direct electric current intensity, being more marked in fibrosarcoma Sa-37 tumor. Complete regressions for fibrosarcoma Sa-37 and Ehrlich tumors were observed for electrical charges of 80 and 92 C/cm(3), respectively. Histopathological and peritumoral findings in Ehrlich tumor revealed in the treated group marked tumor necrosis, vascular congestion, peritumoral neutrophil infiltration, an acute inflammatory response, and a moderate peritumoral monocyte infiltration. The morphologic pattern of necrotic cell mass after direct electric current treatment is the coagulative necrosis. These findings were not observed in any of the untreated tumors. Conclusion: The data presented indicate that electrotherapy with low-level DEC is feasible and effective in the treatment of the Ehrlich and fibrosarcoma Sa-37 tumors. Our results demonstrate that the sensitivity of these tumors to direct electric current and survival rates of the mice depended on both the amount of electrical charge and the type of tumor. Also the complete regression of each type of tumor is obtained for a threshold amount of electrical charge MH - Cuba MH - Mexico|Sonora PB - LONDON: BIOMED CENTRAL LTD RP - NOT IN FILE U3 - TC 1 U4 - Oncology U5 - J;Article AV - English IS - 1471-2407 UR - ISI:000226610000002 L2 - MAMMARY SO - Bmc Cancer 2004 ;4(): 10440 UI - 6389 AU - Ciros-Perez J AU - Carmona MJ AU - Lapesa S AU - Serra M AD - Univ Valencia, Inst Cavanilles Biodiversitat & Biol Evolut, Valencia 46071, SpainCiros-Perez, J, Univ Nacl Autonoma Mexico, FES Iztacala, PILT UIICSE, Trop Limnol Project, AP 314, Tlalnepantla 54090, Edo, Mexico TI - Predation as a factor mediating resource competition among rotifer sibling species AB - The relevance of predation as a factor mediating the competitive interaction among ecologically very similar species is investigated by experimentally analyzing the effect of the copepod predator Diacyclops bicuspidatus odessanus on three sibling rotifer species belonging to the Brachionus plicatilis species complex. These rotifer species are similar in shape but show notable differences in body size. Predator and prey species co-occur in brackish waterbodies close to the Mediterranean coast of Spain. First, we characterized differential vulnerability of rotifers to predation. A consistent tendency of higher predation rates on smaller prey (i.e., smaller species and younger individuals) was observed. Analysis of predation showed that predator contact rate did not differ significantly among prey species, but that attack, capture probabilities, and handling time did. Second, we performed population dynamics experiments with two prey species competing for a single resource at different levels of predation. Predation extended coexistence of the competing rotifers, whereas the inferior competitor was excluded in the absence of the predator. In some pairwise experiments, we found that the greater the predation level, the larger the relative increase in density of the inferior competitor. Our results suggest that predation can affect the dynamics of very similar competing species in natural aquatic communities, promoting coexistence MH - Mexico|Estado De Mexico MH - Spain PB - WACO: AMER SOC LIMNOLOGY OCEANOGRAPHY RP - NOT IN FILE U3 - TC 7 U4 - Limnology;Oceanography U5 - J;Article AV - English IS - 0024-3590 UR - ISI:000188381100005 L2 - BRACHIONUS-PLICATILIS ROTIFERA; LABORATORY EXPERIMENTS; APPARENT COMPETITION; MESOCYCLOPS-EDAX; NORTH-AMERICA; FOOD; COEXISTENCE; ZOOPLANKTON; DIVERSITY; BEHAVIOR SO - Limnology and Oceanography 2004 ;49(1):40-50 10441 UI - 3841 AU - Cisneros-Sinencio LF AU - az-Sanchez A AU - Ramirez-Angulo J AD - New Mexico State Univ, Klipsch Sch Elect & Comp Engn, Las Cruces, NM 88003, USANatl Inst Astrophys Opt & Elect, Dept Elect, Puebla, MexicoCisneros-Sinencio, LF, MCST Freescales Semicond, Puebla, Mexico TI - Reconfigurable logic family based on floating gates AB - Reconfigurable logic circuitry has special importance because the popularity of Field Programmable Gate Arrays (FPGA) based applications. A reconfigurable logic based on FGMOS transistors, where a single stage can perform binary operations as well as state machines, is presented. The use of the proposed logic allows the integration of several stages into a single chip because their small area requirement, low voltage and low power characteristics MH - Mexico|Puebla MH - USA PB - TOKYO: IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0916-8524 UR - ISI:000225210400020 L2 - logic family;low-voltage;low power;small-area;floating-gate transistors;CIRCUITS SO - Ieice Transactions on Electronics 2004 ;E87C(11):1884-1888 10442 UI - 3696 AU - Clapp M AU - Weth T AD - Univ Giessen, Inst Math, D-35392 Giessen, GermanyUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoWeth, T, Univ Giessen, Inst Math, Arndstr 2, D-35392 Giessen, Germany TI - Multiple solutions of nonlinear scalar field equations AB - We establish existence of multiple solutions of the semilinear elliptic equation [GRAPHICS] where N greater than or equal to 3, 2 < p < 2N/(N - 2), and a(x) and q(x) tend to some positive limits a(infinity) and q(infinity) respectively as \x\ --> infinity. Assuming some weak one-sided asymptotic estimates for a(x) and q(x), we prove that (s) has at least N/2 + 1 pairs +/-u of nontrivial weak solutions MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0360-5302 UR - ISI:000225610700009 L2 - nonlinear Schrodinger equations;lack of compactness;flow invariance;minimax methods;CONCENTRATION-COMPACTNESS PRINCIPLE; SEMILINEAR ELLIPTIC EQUATION; SIGN CHANGING SOLUTIONS; SCHRODINGER-EQUATIONS; POSITIVE SOLUTIONS; RADIAL SOLUTIONS; EXISTENCE; CALCULUS; DOMAINS SO - Communications in Partial Differential Equations 2004 ;29(9-10):1533-1554 10443 UI - 4542 AU - Clapp M AU - Weth T AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Giessen, Math Inst, D-35392 Giessen, GermanyClapp, M, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Minimal nodal solutions of the pure critical exponent problem on a symmetric domain AB - We establish existence of nodal solutions to the pure critical exponent problem -Deltau = \u\(2*-2)u in Omega, u = 0 on partial derivativeOmega, where Omega a bounded smooth domain which is invariant under an orthogonal involution of R-N. We extend previous results for positive solutions due to Coron, Dancer, Ding, and Passaseo to existence and multiplicity results for solutions which change sign exactly once MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 12 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0944-2669 UR - ISI:000223621000001 L2 - NONLINEAR ELLIPTIC-EQUATIONS; CRITICAL SOBOLEV EXPONENT; CRITICAL GROWTH; MULTIPLICITY; TOPOLOGY SO - Calculus of Variations and Partial Differential Equations 2004 ;21(1):1-14 10444 UI - 4668 AU - Clapp M AU - Ding YH AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoChinese Acad Sci, Inst Math, AMSS, Beijing 100080, Peoples R ChinaClapp, M, Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Positive solutions of a Schrodinger equation with critical nonlinearity AB - We study the nonlinear Schrodinger equation -Deltau + lambdaa(x)u = muu + u(2*-1), u is an element of R-N, with critical exponent 2* = 2N/(N - 2), N greater than or equal to 4, where a greater than or equal to 0 has a potential well. Using variational methods we establish existence and multiplicity of positive solutions which localize near the potential well for mu small and lambda large MH - Mexico|Distrito Federal MH - Peoples R China PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0044-2275 UR - ISI:000223175200003 L2 - nonlinear Schrodinger equation;critical nonlinearity;localized solutions;potential well;CRITICAL SOBOLEV EXPONENT; ELLIPTIC EQUATION; BOUND-STATES; EXISTENCE; TOPOLOGY; DOMAIN SO - Zeitschrift fur Angewandte Mathematik und Physik 2004 ;55(4):592-605 10445 UI - 5806 AU - Clapp M AU - del Pino M AU - Musso M AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoChile Univ, Dept Ingn Matemat, Santiago, ChileChile Univ, Ctr Modelamiento Matemat, Santiago, ChilePolitecn Turin, Dipartimento Matemat, I-10129 Turin, ItalyClapp, M, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Multiple solutions for a non-homogeneous elliptic equation at the critical exponent AB - We consider the equation -Deltau = \u\(4/(N-2))u + epsilonf (x) under zero Dirichlet boundary conditions in a bounded domain Omega in R-N exhibiting certain symmetries, with f greater than or equal to 0, f not equal 0. In particular, we find that the number of sign-changing solutions goes to infinity for radially symmetric f, as epsilon --> 0 if Omega is a ball. The same is true for the number of negative solutions if Omega is an annulus and the support of f is compact in Omega MH - Chile MH - Italy MH - Mexico|Distrito Federal PB - EDINBURGH: ROYAL SOC EDINBURGH RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0308-2105 UR - ISI:000220567400006 L2 - CRITICAL-POINTS; CRITICAL NONLINEARITY; POSITIVE SOLUTIONS; DOMAINS; FUNCTIONALS SO - Proceedings of the Royal Society of Edinburgh Section A-Mathematics 2004 ;134():69-87 10446 UI - 1823 AU - Clark P AU - Ragi S AU - Haddock L AU - Suarez E AU - Perez C AU - Molina FC AU - Deleze M AU - Salmeron J AU - Palermo L AU - Cummings SR AD - UNAM, IMSS, Fac Med, Mexico City, DF, MexicoCEDOES, Vitoria, BrazilUniv Puerto Rico, San Juan, PR 00936, USAUnidad Diagnost Osteoporosis, Mexicali, Baja California, MexicoClin Osteoporosis, Puebla, MexicoUCSF, Coordinating Ctr, San Francisco, CA, USA TI - Prevalence of vertebral fractures in Brazil, Puerto Rico and Mexico. Preliminary report of the Latin American vertebral osteoporosis study MH - Brazil MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000224326800341 SO - Journal of Bone and Mineral Research 2004 ;19():S87-S87 10447 UI - 4914 AU - Clark P AU - Deleze M AU - Cons-Molina F AU - Salmeron J AU - Palermo L AU - Cummings S AD - Univ Nacl Autonoma Mexico, Fac Med, IMSS, Ctr Med Nacl,Clin Epidemiol Unit, Mexico City 04510, DF, MexicoClin Osteoporosis, Puebla, MexicoUnidad Diagnost Osteoporosis, Mexicali, Baja California, MexicoIMSS, Epidemiol & Hlth Syst Unit, Morelos, MexicoUniv Calif San Francisco, Coordinating Ctr, San Francisco, CA 94143, USA TI - Prevalence of vertebral fractures in Mexico: A population-based study MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Puebla MH - USA PB - GODALMING: SPRINGER LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000221453600152 SO - Osteoporosis International 2004 ;15():S49-S49 10448 UI - 4915 AU - Clark P AU - Talavera J AU - Palermo L AU - Cummings S AD - Univ Calif San Francisco, Coordinating Ctr, San Francisco, CA 94143, USAUniv Nacl Autonoma Mexico, Fac Med, IMSS, Ctr Med Nacl,Clin Epidemiol Unit, Mexico City 04510, DF, Mexico TI - Simple indices on plain x-rays strongly predict risk of hip fractures in Mexican men and women MH - Mexico|Distrito Federal MH - USA PB - GODALMING: SPRINGER LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000221453600157 SO - Osteoporosis International 2004 ;15():S51-S51 10449 UI - 4916 AU - Clark P AU - Lavielle P AU - Salmeron J AU - Cummings S AD - Univ Calif San Francisco, Coordinating Ctr, San Francisco, CA 94143, USAIMSS, Epidemiol & Hlth Syst Unit, Morelos, MexicoUniv Nacl Autonoma Mexico, Fac Med, IMSS, Ctr Med Nacl,Clin Epidemiol Unit, Mexico City 04510, DF, Mexico TI - Incident rates of hip fractures in Mexicans over 50 years MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - GODALMING: SPRINGER LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000221453600158 SO - Osteoporosis International 2004 ;15():S51-S51 10450 UI - 6698 AU - Clark WM AU - Davalos A AU - Goldstein LB AU - Kaste M AU - Leiter L AU - Zivin J AU - Sillesen H AU - Crimmins D AU - Davis S AU - Dimmitt S AU - Donnan G AU - Frayne J AU - Freilich D AU - Gillies D AU - Mikocki J AU - Schmidauer C AU - Schmidt R AU - De Bleecker J AU - Deceuninck F AU - Tack P AU - Thijs V AU - Robberecht W AU - Fernandes JG AU - Beaudry M AU - Cote R AU - Hoyte K AU - Lebrun LH AU - Sahlas DJ AU - Norris J AU - Selchen D AU - Shuaib A AU - Simard D AU - Spence D AU - Teal P AU - Winger M AU - Matamala G AU - Jaramillo A AU - Cifkova R AU - Kalita Z AU - Rektor I AU - Rosolova H AU - Stipal R AU - Vaclavik D AU - Boysen G AU - Iversen H AU - Anderson AR AU - Sillesen H AU - Hillbom M AU - Kaste M AU - Numminen H AU - Pilke A AU - Salmivaara A AU - Pammo O AU - Sivenius J AU - Amarenco P AU - Boulliat J AU - de Broucker T AU - Chollet F AU - Mahagne MH AU - Milandre L AU - Moulin T AU - Roullet E AU - Bogdahn U AU - Busse O AU - Diener HC AU - Haberl R AU - Hamann G AU - Harms L AU - Hendrich A AU - Kroczek G AU - Hennerici M AU - Knecht S AU - Henningsen H AU - Lichy C AU - Grau A AU - Sander D AU - Schneider D AU - Berrouschot J AU - Karageorgiou C AU - Kazis A AU - Mylonas I AU - Stathis P AU - Vogiatzoglou D AU - Bornstein N AU - Honigman S AU - Gross B AU - Lampl Y AU - Streifler J AU - Capurso A AU - Comi G AU - Canal N AU - Frattola L AU - Gandolfo C AU - Poloni M AU - Mamoli A AU - Senin U AU - Guerra RR AU - de Keyser JHA AU - Boon AM AU - Haas JA AU - Kamphuis DJ AU - De Kort PLM AU - Koudstaal PJ AU - Anderson NE AU - Scott R AU - Singh GPJ AU - Czlonkowska A AU - Drozdowski W AU - Gralewski Z AU - Kozubski W AU - Kuczynska-Zardzewialy A AU - Podemski R AU - Stelmasiak Z AU - Szczudlik A AU - Correia C AU - Cunha L AU - Ferro J AU - Lietava J AU - Raslova K AU - Carr J AU - Gardiner J AU - Kruger AJ AU - Chamorro A AU - Davalos A AU - Egido J AU - Fernandez O AU - Marcos JRG AU - Matias-Guiu J AU - Jimenez D AU - Lago A AU - Martinez CJ AU - Mostacero E AU - Rubio F AU - Sabin JA AU - Tejedor ED AU - Torres MG AU - Trejo J AU - Vivancos J AU - Leijd B AU - Laska AC AU - Leoo T AU - Strand T AU - Terent A AU - Wagner A AU - Wallen T AU - Baumgartner R AU - Bogousslavsky J AU - Hungerbuhler H AU - Lyrer P AU - Mattle H AU - Bath P AU - Ekpo EB AU - Freeman A AU - Lees KR AU - Shetty HGM AU - MacLeod MJ AU - Dijkhuizen R AU - MacWalter RS AU - Sharma AK AU - Albers G AU - Altafullah I AU - Benavente O AU - Book D AU - Broderick J AU - Calder C AU - Callahan AS AU - Carlini W AU - Chaturvedi S AU - Chippendale T AU - Clark W AU - Coull B AU - Davis P AU - Devlin T AU - Dick AR AU - Dooneief G AU - Duff RS AU - Estronza N AU - Lloyd KA AU - Forteza A AU - Frankel MR AU - Jacobson T AU - Frey JL AU - Friday G AU - Goldstein J AU - Graham G AU - Hammer M AU - Goldstein S AU - Gebel J AU - Harper W AU - Hariharan S AU - Sen S AU - Harris J AU - Hendin B AU - Hess DC AU - Hinton R AU - Hollander J AU - Hughes RL AU - Kasner S AU - Kent TA AU - Kim L AU - Kirshner H AU - LaMonte M AU - Ledbetter LY AU - Levin K AU - Libman R AU - Matlock J AU - McDowell P AU - Mcgee FE AU - Meyer B AU - Jackson C AU - Minagar A AU - Pajeau A AU - Munschauer FE AU - Munson R AU - Nash M AU - Nassief A AU - Hsu C AU - Orr SC AU - Tulyapronchote R AU - Gomez C AU - Ratinov G AU - Salanga V AU - Dandapani BK AU - Silliman S AU - Singer R AU - Smith D AU - Sullivan H AU - Thaler D AU - Tietjen G AU - Tuchman M AU - Uskavitch D AU - Vicari R AU - Weinstein R AU - Wilterdink J AU - Zweifler R AU - Verro P AU - Rymer M AU - de Bastos M AD - Cent Coast Neurosci Res, Gosford, AustraliaRoyal Melbourne Hosp, Parkville, Vic 3050, AustraliaRoyal Perth Hosp, Perth, WA, AustraliaAustin & Repatriat Med Ctr, Heidelberg, Vic, AustraliaAlfred Hosp, Prahran, Vic 3181, AustraliaWestern Hosp, Footscray, Vic, AustraliaPrince Wales Hosp, Randwick, NSW 2031, AustraliaWilhelminenspital Stadt Wien, Vienna, AustriaLeopold Franzens Univ, Innsbruck, AustriaUniv Klin Neurol, Graz, AustriaAZ St Lucas, Ghent, BelgiumKlin OLV van Lourdes, Waregem, BelgiumSt Andries Ziekenhuis, Tielt, BelgiumUniv Hosp Gasthuisberg, B-3000 Louvain, BelgiumSao Lucas Hosp, Porto Alegre, RS, BrazilComplexe Hosp Sagamie, Chicoutimi, PQ, CanadaMontreal Gen Hosp, Montreal, PQ H3G 1A4, CanadaFoothills Prov Gen Hosp, Calgary, AB T2N 2T9, CanadaCHUM, Hop Notre Dame, Montreal, PQ, CanadaSunnybrook Stroke Res Unit, Toronto, ON, CanadaTrillium Hlth Ctr, Mississauga, ON, CanadaUniv Alberta Hosp, Edmonton, AB T6G 2B7, CanadaHosp Enfant Jesus, Quebec City, PQ, CanadaSeibens Drake Robarts Res Inst, London, ON, CanadaVancouver Gen Hosp, Vancouver, BC, CanadaWindsor Reg Hosp, Tecumseh, ON, CanadaHosp Naval Almirante Nef, Vina Del Mar, ChileInst Clin & Expt Med, Prague, Czech RepublicBata Hosp, Zlin, Czech RepublicMasaryk Univ, St Anns Hosp, Brno, Czech RepublicFac Hosp Pilsen, Plzen, Czech RepublicFac Hosp Ostrava, Ostrava, Czech RepublicBlessed Mary Anthony Hosp, Ostrava, Czech RepublicBispebjerg Hosp, Copenhagen NV, DenmarkGlostrup Cty Hosp, Glostrup, DenmarkGentofte Univ Hosp, Copenhagen, DenmarkOulu Univ Hosp, Oys, FinlandUniv Helsinki Hosp, Helsinki, FinlandS Karelia Cent Hosp, Lappeenranta, FinlandKymenlaakso Cent Hosp, Kotka, FinlandPaijat Hame Cent Hosp, Lahti, FinlandKuopio Univ Hosp, SF-70210 Kuopio, FinlandDenis Diderot Univ, Bichat Hosp, Paris, FranceCtr Hosp Fleyriat, Bourg En Bresse, FranceHop Delafontaine, St Denis, FranceHop Purpan, Toulouse, FranceHop Louis Pasteur, F-06002 Nice, FranceHop Enfants La Timone, Marseille, FranceCHU Hop Jean Minjoz, Besancon, FranceHop Tenon, F-75970 Paris, FranceUniv Regensburg, Bezirksklinikum, D-8400 Regensburg, GermanyKlinikum Minden, Minden, GermanyUniv Klinikum Essen, Essen, GermanyStadt Krankenhaus Harlaching, Munich, GermanyUniv Munich, Klinikum Grosshadern, Munich, GermanyCharite, Neurol Poliklin, Berlin, GermanyKlinikum Rodach, Bad Rodach, GermanyUniv Heidelberg, Klinikum Mannheim, Mannheim, GermanyUniv Munster, Munster, GermanyUniv Heidelberg, Heidelberg, GermanyTech Univ Munich, Klinikum Rechts Isar, Munich, GermanyUniv Leipzig, Univ Klinikum, Leipzig, GermanyGen State Hosp Athens G Gennimatas, Athens, GreeceGen Hosp G Papanikolaou, Thessaloniki, GreeceGen Hosp AHEPA, Thessaloniki, Greece1st Therapeut Inst Social Secur, Athens, GreeceAmalia Fleming Hosp, Athens, GreeceIchilov Hosp, IL-64239 Tel Aviv, IsraelCarmel Hosp, Haifa, IsraelWolfson Med Ctr, Holon, IsraelRabin Med Ctr, Petah Tiqwa, IsraelPoliclin Univ, Bari, ItalyOsped San Raffaele, Milan, ItalyOsped San Gerardo, Monza, ItalyUniv Genoa, Genoa, ItalyOsped Riuniti Bergamo, I-24100 Bergamo, ItalyUniv Perugia, I-06100 Perugia, ItalyHosp Univ Dr Jose Eleuterio Gonzalez, Monterrey, Nuevo Leon, MexicoUniv Groningen Hosp, Groningen, NetherlandsOosterscheldeziekenhuizen, Goes, NetherlandsTwenteborg Ziekenhuis, Almelo, NetherlandsReinier de Graaf Gasthuis, Delft, NetherlandsSt Elizabeth Hosp, Tilburg, NetherlandsErasmus Med Ctr, Rotterdam, NetherlandsAuckland Hosp, Auckland, New ZealandChristchurch Hosp, Christchurch, New ZealandN Shore Hosp, Takapuna, New ZealandInst Psychiat & Neurol, Warsaw, PolandMed Acad Bialystok, Bialystok, PolandReg Woiewodeship Hosp, Sosnowiec, PolandMed Acad Poznan, PL-60780 Poznan, PolandWolski Hosp, Warsaw, PolandMed Acad Wroclaw, Wroclaw, PolandLublin Med Acad, Lublin, PolandJagiellonian Univ, Krakow, PolandHosp Sto Antonio, Oporto, PortugalHosp Univ Coimbra, Coimbra, PortugalHosp Santa Maria, Lisbon, PortugalComenius Univ, Bratislava, SlovakiaMetab Ctr, Bratislava, SlovakiaTygerberg Hosp, Parow, South AfricaConstantia MediClin, Cape Town, South AfricaUniv Hosp, Bloemfontein, South AfricaHosp Clin Barcelona, Barcelona, SpainHosp Josep Trueta, Girona, SpainHosp Clin San Carlos, Madrid, SpainHosp Carlos Haya, Malaga, SpainHosp Virgen Rocio, Seville, SpainHosp Gen Alicante, Alicante, SpainHosp Univ Nuestra Senora Valme, Seville, SpainHosp La Fe, E-46009 Valencia, SpainHosp Son Dureta, Palma de Mallorca, SpainHosp Clin Univ Lozana Blesa, Zaragoza, SpainCiudad Sanitaria Univ Bellvitge, Barcelona, SpainHosp Valle De Hebron, Barcelona, SpainHosp La Paz, Madrid, SpainHosp Virgen Macarena, Seville, SpainHosp Gen Yague, Burgos, SpainHosp Princesa, Madrid, SpainSt Gorans Univ Hosp, Stockholm, SwedenDanderyd Hosp, Danderyd, SwedenNorrlands Univ Sjukhus, Umea, SwedenAkad Hosp, Uppsala, SwedenKarolinska Sjukhuset, Stockholm, SwedenVastervik Hosp, Vastervik, SwedenUniv Spital Zurich, Zurich, SwitzerlandCHU Vaudois, CH-1011 Lausanne, SwitzerlandKantonsspital Aarau, Aarau, SwitzerlandNeurol Univ Klin, Basel, SwitzerlandNeurol Poliklin Inselspital, Bern, SwitzerlandCity Hosp Nottingham, Nottingham, EnglandQueen Elizabeth Hosp, Woolwich, EnglandSt Woolos Hosp, Newport, WalesUniv Glasgow, Western Infirm, Glasgow G11 6NT, Lanark, ScotlandUniv Wales Hosp, Cardiff CF4 4XW, S Glam, WalesAberdeen Royal Infirm, Aberdeen, ScotlandUniv Dundee, Ninewells Hosp & Med Sch, Dundee DD1 9SY, ScotlandUniv Hosp Aintree, Liverpool, Merseyside, EnglandStanford Stroke Ctr, Palo Alto, CA, USAMinneapolis Clin Neurol, Golden Valley, MN, USAUniv Texas, Hlth Sci Ctr, San Antonio, TX, USAMed Coll Wisconsin, Milwaukee, WI 53226, USAUniv Cincinnati, Cincinnati, OH, USAUpstate Clin Res LLC, Albany, NY, USANeurol Consultants PC, Nashville, TN, USAMedford Neurol Clin, Medford, OR, USADetroit Med Ctr, Detroit, MI, USAN Cty Neurol Associates, Oceanside, CA, USAOregon Stroke Ctr, Portland, OR, USAArizona Hlth Sci Ctr, Tucson, AZ 85724, USAUniv Iowa Hosp & Clin, Iowa City, IA 52242, USAChattanooga Neurol Associates, Chattanooga, TN, USAUniv Kansas, Med Ctr, Kansas City, KS 66103, USANeurol Grp PC, Norristown, PA, USACOX Pharmacotherapy Res Div, Springfield, MO, USABlue Ridge Res Ctr, Roanoke, VA, USAUniv Miami, Miami, FL 33152, USAGrady Hlth Syst, Atlanta, GA, USABarrow Neurol Clin, Phoenix, AZ, USABryn Mawr Hosp, Bryn Mawr, PA, USASan Francisco Clin Res Ctr, San Francisco, CA, USAVet Adm Med Ctr, Albuquerque, NM 87108, USAUniv Pittsburgh, Med Ctr, Pittsburgh, PA, USAWake Res Associates, Raleigh, NC, USANew Jersey Neurosci Inst, Edison, NJ, USANeurol Consultants, Ft Lauderdale, FL, USAPhoenix Neurol Associates, Phoenix, AZ, USAVet Adm Med Ctr, Augusta, GA 30904, USANeurol Consultants, Dallas, TX, USARochester Gen Hosp, Rochester, NY 14621, USADenver Gen Hosp, Denver, CO, USAUniv Penn, Med Ctr, Philadelphia, PA 19104, USAUniv Texas, Div Med, Galveston, TX 77555, USARENSTAR Med Res, Ocala, FL, USAVanderbilt Univ, Med Ctr, Nashville, TN, USAUniv Maryland, Med Ctr, Baltimore, MD 21201, USANeurol Ctr Middle Tennessee, Columbia, TN, USANeurol Grp Bergen Cty, Ridgewood, NJ, USALong Isl Jewish Hlth Syst, New Hyde Pk, NY, USASan Antonio Prevent & Diagnost Med PA, San Antonio, TX, USANeurol Associates Inc, Richmond, VA, USASan Diego Stroke Ctr, San Diego, CA, USALSU Med Ctr, Shreveport, LA, USABuffalo Gen Hosp, Buffalo, NY 14203, USAEvanston NW Healthcare, Evanston, IL, USADekalb Neurol Associates, Decatur, GA, USAWashington Univ, Sch Med, St Louis, MO, USAUniv Alabama, Dept Neurol, Birmingham, AL 35294, USAChristus St Joseph Med Pl, Houston, TX, USACleveland Clin Florida, Weston, FL, USAUniv Florida, Hlth Sci Ctr, Jacksonville, FL 32209, USANeurol Clin Res Inc, Plantation, FL, USAColorado Neurol Inst Stroke Program, Englewood, CO, USAMichigan Med PC, Grand Rapids, MI, USATufts Univ New England Med Ctr, Boston, MA 02111, USAMed Coll Ohio, Toledo, OH 43699, USAPalm Beach Neurol Grp, Palm Beach Gardens, FL, USASt Thomas Med Plaza, Nashville, TN, USAMelbourne Internal Med Associates, Melbourne, FL, USADiablo Clin Res, Walnut Creek, CA, USARhode Isl Hosp, Providence, RI, USA, USA, Med Ctr, Mobile, AL USAUniv Calif Davis, Sacramento, CA 95817, USACtr Clin Neurol Studies LC, Kansas City, MO, USAHosp Univ Caracas, Caracas, VenezuelaClark, WM, Cent Coast Neurosci Res, Gosford, Australia TI - Design and baseline characteristics of the stroke prevention by aggressive reduction in cholesterol levels (SPARCL) study (vol 16, pg 389, 2003) MH - Australia MH - Austria MH - Belgium MH - Brazil MH - Canada MH - Chile MH - Czech Republic MH - Denmark MH - United Kingdom MH - Finland MH - France MH - Germany MH - Greece MH - Israel MH - Italy MH - Mexico|Nuevo Leon MH - Netherlands MH - New Zealand MH - Poland MH - Portugal MH - Slovakia MH - South Africa MH - Spain MH - Sweden MH - Switzerland MH - USA MH - Venezuela PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology;Peripheral Vascular Disease U5 - J;Correction AV - English IS - 1015-9770 UR - ISI:000187394600019 SO - Cerebrovascular Diseases 2004 ;17(1):91-92 10451 UI - 5307 AU - Claudia CO AU - Miguel RS AU - Angel ONM AU - Gutierrez-Yurrita PJ AD - CINVESTAV, IPN, Lab Nutr, Dept Recursos Mar, Merida 97310, Yucatan, VenezuelaUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Ecol & Recursos Nat, Lab Ecol & Biol Marina Expt, Campeche 24150, MexicoUniv Autonoma Queretaro, Fac Ciencias Nat Licenciatura Biol, Zool Lab, Ctr Univ, Queretaro 76010, MexicoClaudia, CO, CINVESTAV, IPN, Lab Nutr, Dept Recursos Mar, Merida 97310, Yucatan, Venezuela TI - Effect of density and sex ratio on gonad development and spawning in the crayfish Procambarus llamasi AB - The effect of density and sex ratio on maturation and spawning in the crayfish Procambarus Ilamasi was evaluated during a 90-day study. Five stocking densities were tested: 10 org/m(2) (5 females/m(2)), 20 org/m(2) (15 females/m(2)), 34 org/m(2) (29 females/m(2)), 49 org/m(2) (44 females/m(2)) and 64 org/m(2) (59 females/m(2)), and five sex ratios (male/female) 1:1, 1:3, 1:6, 1:9 and 1:12. The Maturation Index (MI) results exhibited no significant differences between the high-density treatments, though there was a significant difference between these and the lowest density treatment. Females in the lowest density did not mature or spawn. The Gonadosomatic Index (GSI) showed no differences between densities, with high values in all treatments. Spawning increased in direct relation to density with the highest spawning percentage recorded in the highest density treatment. Density had a clear and significant effect on maturation and spawning in P. Ilamasi. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Campeche MH - Mexico|Queretaro MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000221946500027 L2 - density;sex ratio;Procambarus llamasi;RED SWAMP CRAYFISH; 1ST MATURITY; VILLALOBOS; CLARKII; ONSET SO - Aquaculture 2004 ;236(1-4):331-339 10452 UI - 4980 AU - Clavero JE AU - Sparks RSJ AU - Pringle MS AU - Polanco E AU - Gardeweg MC AD - Serv Nacl Geol & Mineria, Santiago 0104, ChileUniv Bristol, Bristol BS8 1RJ, Avon, EnglandScottish Univ Res & Reactor Ctr, E Kilbride G75 0QF, Lanark, ScotlandNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoClavero, JE, Serv Nacl Geol & Mineria, Av Santa Maria, Santiago 0104, Chile TI - Evolution and volcanic hazards of Taapaca Volcanic Complex, Central Andes of Northern Chile AB - Taapaca Volcanic Complex is a large dacitic volcano (35 km(3)) located in the western border of the active zone of the Central Andes of Northern Chile. Apart from early poorly preserved silicic andesites, Taapaca Volcanic Complex has generated remarkably similar porphyritic hornblende-biotite dacites with distinctive sanidine megacrysts for at least 1.5 Ma. The main products of the volcano are dacite lavas and domes with associated block-and-ash flow deposits. There have also been several sector collapses to generate debris avalanches, which are closely associated with volcanic blasts and episodes of dome growth. Four stages of evolution are recognized with volcanism occurring in short bursts between much longer periods of dormancy. Volcanism has built a substantial stratovolcano and has migrated 4-5 km towards the SW with time. Late Pleistocene to Holocene activity has involved at least three sector collapses of the hydrothermally altered flanks and domes. Volcanic blasts, block-and-ash flows, debris avalanches and lahars have been distributed down the southwestern flanks. These areas are the main populated part of the Chilean Altiplano and the location of the main road between Bolivia and the Pacific Ocean coast. A future eruption will threaten these areas and the regional economy MH - Chile MH - United Kingdom MH - Mexico|Distrito Federal PB - BATH: GEOLOGICAL SOC PUBL HOUSE RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7649 UR - ISI:000222554900007 L2 - Central Andes;Holocene;debris avalanches;pyroclastics;volcanic risk;SOUFRIERE HILLS VOLCANO; DEBRIS AVALANCHES; UNZEN VOLCANO; 1990-1995 ERUPTION; SHIVELUCH VOLCANO; AUGUSTINE VOLCANO; PYROCLASTIC FLOWS; MONTSERRAT; KAMCHATKA; DEPOSITS SO - Journal of the Geological Society 2004 ;161():603-618 10453 UI - 4474 AU - Cocke DL AU - Mencer DE AU - Hossain MA AU - Schennach R AU - Kesmez M AU - Parga JR AU - Naugle GD AD - Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710, USAWilkes Univ, Dept Chem, Wilkes Barre, PA 18776, USAGraz Tech Univ, Inst Solid State Phys, Graz, AustriaInst Technol Saltillo, Dept Met & Mat Sci, Saltillo 25000, Coahuila, MexicoTexas A&M Univ, Dept Phys, College Stn, TX 77843, USACocke, DL, Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710 USA TI - Investigation of the metal-oxide buried interfacial zone with linear sweep voltammetry AB - Interest in copper as a technologically important material needs to be met with greater understanding of the fundamental chemical reactions of copper. In particular, there is still a lack of universal agreement on the oxidation process of bulk copper and thin copper films. In this study, the authors demonstrate the use of linear sweep voltammetry (LSV) to study buried structures in the oxide layers on copper. In particular, LSV can be used to detect reactions at buried interfaces. It is also emphasized that surface scientists should recognize Cu3O2 and the decomposition of copper oxides at the metal-oxide interface in new studies on copper oxidation and in interpreting already existing copper oxidation data. The two key parameters that drive oxide growth and decomposition are demonstrated to be oxygen activity and the free energies of formation of the oxides (per mole of oxide ion). The complex nature of the oxidation of copper, as well as other metals and alloys, can be described qualitatively using the Modified Cabrera-Mott (C-M) Model. Surface studies of oxidation of metals and alloys need to be supported and complemented by other techniques such as chemical or electrochemical methods MH - Austria MH - Mexico|Coahuila MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Electrochemistry U5 - J;Article AV - English IS - 0021-891X UR - ISI:000223739300008 L2 - copper;CuxO;Cu2O;Cu3O2;CuO;oxide decomposition;oxygen di. usion;linear sweep voltammetry;modified Cabrera and Mott (C-M) model;RAY PHOTOELECTRON-SPECTROSCOPY; SURFACE REACTIVITY; COPPER OXIDATION; LOW-TEMPERATURE; BULK COPPER; THIN-FILMS; TI-CU; OXYGEN; ALLOYS; XPS SO - Journal of Applied Electrochemistry 2004 ;34(9):919-927 10454 UI - 5274 AU - Coello CAC AU - Pulido GT AU - Lechuga MS AD - CINVESTAV IPN, Secc Computac, Dept Ing Elect, Secc Computac, Mexico City 07300, DF, MexicoUniv Birmingham, Sch Comp Sci, Birmingham B15 2TT, W Midlands, EnglandCoello, CAC, CINVESTAV IPN, Secc Computac, Dept Ing Elect, Secc Computac, Mexico City 07300, DF, Mexico TI - Handling multiple objectives with particle swarm optimization AB - This paper presents an approach in which Pareto dominance is incorporated into particle swarm optimization (PSO) in order to allow this heuristic to handle problems with several objective functions. Unlike other current proposals to extend PSO to solve multiobjective optimization problems, our algorithm uses a secondary (i.e., external) repository of particles that is later used by other particles to guide their own flight. We also incorporate a special mutation operator that enriches the exploratory capabilities of our algorithm. The proposed approach is validated using several test functions and metrics taken from the standard literature on evolutionary multiobjective optimization. Results indicate that the approach is highly competitive and that can be considered a viable alternative to solve multiobjective optimization problems MH - United Kingdom MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 66 U4 - Computer Science, Artificial Intelligence;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 1089-778X UR - ISI:000221984600006 L2 - evolutionary multiobjective optimization;multiobjective optimization;multiobjective particle swarm optimization;particle swarm optimization SO - Ieee Transactions on Evolutionary Computation 2004 ;8(3):256-279 10455 UI - 4224 AU - Coello V AU - Sondergaard T AU - Bozhevolnyi SI AD - UANL, FCFM, Nuevo Leon, MexicoUniv Aalborg, Dept Phys & Nanotechnol, Micro Managed Photons AS, DK-9220 Aalborg, DenmarkCoello, V, UANL, FCFM, CP 66450, Nuevo Leon, Mexico TI - Modeling of a surface plasmon polariton interferometer AB - We model the operation of a micro-optical interferometer for surface plasmon polaritons (SPPs) that comprises an SPP beam-splitter formed by equivalent scatterers lined up and equally spaced. The numerical calculations are carried out by using a relatively simple vectorial dipolar model for multiple SPP scattering [Phys. Rev. B 67 (2003) 165405]. The SPP beam-splitter is simulated elucidating the influence of system parameters, such as the angle of SPP beam incidence, scattering particle size, and inter-particle distance, on the splitting efficiency and phase difference between the transmitted and reflected beams. It is found that the splitting efficiency is very sensitive to the size of scatterers and angle of incidence. Comparing our simulations with experimental data available in the literature, we conclude that this approach can be used, with certain limitations, for modelling of SPP components assembled of individual scatterers, e.g., beam-splitters and interferometers, and suggest further improvements of the model used. (C) 2004 Elsevier B.V. All rights reserved MH - Denmark MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000224289500013 L2 - surface plasmon polaritons;nanostructures;BAND-GAP STRUCTURES; MULTIPLE-SCATTERING; PROPAGATION; DEFECT SO - Optics Communications 2004 ;240(4-6):345-350 10456 UI - 4941 AU - Cole DC AU - Kearney J AU - Sanin LH AU - Leblanc A AU - Weber JP AD - Univ Toronto, Fac Med, Dept Publ Hlth Sci, Toronto, ON M5S 1A8, CanadaHlth Canada, Safe Environm Program, Ottawa, ON K1A 0L2, CanadaUniv Chihuahua, Chihuahua, MexicoQuebec Toxicol Ctr, Quebec City, PQ, CanadaCole, DC, Univ Toronto, Fac Med, Dept Publ Hlth Sci, 12 Queens Pk Crescent, Toronto, ON M5S 1A8, Canada TI - Blood mercury levels among Ontario anglers and sport-fish eaters AB - We conducted two surveys of Ontario (Canada) fishers: a stratified sample of licensed anglers in two Lake Ontario communities (anglers, n = 232) and a shore and community-based sample in five Great Lakes' Areas of Concern (AOC eaters, n = 86). Among the 176 anglers consuming their catch, the median number of sport-fish meals/year was 34.2 meals and 10.9,, respectively, in two communities, with a mean blood total mercury level among these sport-fish consumers of 2.8 mug/L. The vast majority of fish eaten by AOC eaters was from Ontario waters (74%). For AOC eaters, two broad country-of-origin groups were assembled: Euro-Canadians (EC) and Asian-Canadians (AC). EC consumed a median of 174 total fish meals/year and had a geometric mean total mercury level of 2.0 mug/L. Corresponding AC figures were 325 total fish meals/year and 7.9 mug/L. Overall, mercury levels among AOC eaters were higher than in many other Great Lakes populations but lower than in populations frequently consuming seafood. In multivariate models, mercury levels were significantly associated with levels of fish consumption among both anglers and EC AOC eaters. Given the nutritional and social benefits of fish consumption, prudent species and location choices should continue. (C) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Chihuahua PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000222564800008 L2 - environmental exposure;mercury;food contamination;fisheries;ethnic groups;Canada;ST-LAWRENCE-RIVER; SEYCHELLES CHILD-DEVELOPMENT; PRENATAL METHYLMERCURY EXPOSURE; GREAT-LAKES FISH; TOXIC-SUBSTANCES; BIRTH-WEIGHT; CONSUMPTION; AGE; WOMEN; COMMUNITIES SO - Environmental Research 2004 ;95(3):305-314 10457 UI - 4551 AU - Colin P AU - Klypin A AU - Valenzuela O AU - Gottlober S AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoNew Mexico State Univ, Dept Astron, Dept 4500, Las Cruces, NM 88003, USAAstrophys Inst Potsdam, D-14482 Potsdam, GermanyColin, P, Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico TI - Dwarf dark matter halos AB - We study properties of dark matter halos at high redshifts z = 2-10 for a vast range of masses with the emphasis on dwarf halos with masses of 10(7)-10(9) h(-1) M-circle dot. We find that the density profiles of relaxed dwarf halos are well fitted by the Navarro, Frenk, & White (NFW) profile and do not have cores. We compute the halo mass function and the halo spin parameter distribution and find that the former is very well reproduced by the Sheth & Tormen model, while the latter is well fitted by a lognormal distribution with lambda(0) = 0.042 and sigma(lambda) = 0.63. We estimate the distribution of concentrations for halos in a mass range that covers 6 orders of magnitude, from 10(7) to 10(13) h(-1) M-circle dot, and find that the data are well reproduced by the model of Bullock et al. The extrapolation of our results to z = 0 predicts that present-day isolated dwarf halos should have a very large median concentration of similar to35. We measure the subhalo circular velocity functions for halos with masses that range from 4.6 x 10(9) to 10(13) h(-1) M-circle dot and find that they are similar when normalized to the circular velocity of the parent halo. Dwarf halos studied in this paper are many orders of magnitude smaller than well-studied cluster- and Milky Way-sized halos. Yet, in all respects the dwarfs are just downscaled versions of the large halos. They are cuspy and, as expected, more concentrated. They have the same spin parameter distribution and follow the same mass function that was measured for large halos MH - Germany MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223634400004 L2 - cosmology : theory;dark matter;galaxies : formation;galaxies : halos;methods : numerical;GALACTIC SATELLITES; DENSITY PROFILE; MASS FUNCTION; LOCAL GROUP; GALAXIES; EVOLUTION; SIMULATIONS; CLUSTERS; DEPENDENCE; MODELS SO - Astrophysical Journal 2004 ;612(1):50-57 10458 UI - 3988 AU - Collins J AU - Perez A AU - Sudarsky D AU - Urrutia L AU - Vucetich H AD - Penn State Univ, Dept Phys, University Pk, PA 16802, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoNatl Univ La Plata, Astron Observ, La Plata, Buenos Aires, ArgentinaCollins, J, Penn State Univ, Dept Phys, University Pk, PA 16802, USA TI - Lorentz invariance and quantum gravity: An additional fine-tuning problem? AB - Trying to combine standard quantum field theories with gravity leads to a breakdown of the usual structure of space time at around the Planck length, 1.6x10(-35) m, with possible violations of Lorentz invariance. Calculations of preferred-frame effects in quantum gravity have further motivated high precision searches for Lorentz violation. Here, we explain that combining known elementary particle interactions with a Planck-scale preferred frame gives rise to Lorentz violation at the percent level, some 20 orders of magnitude higher than earlier estimates, unless the bare parameters of the theory are unnaturally strongly fine tuned. Therefore an important task is not just the improvement of the precision of searches for violations of Lorentz invariance, but also the search for theoretical mechanisms for automatically preserving Lorentz invariance MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 33 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000224924900013 L2 - RELATIVITY; VIOLATION; BREAKING; SYMMETRY; CPT SO - Physical Review Letters 2004 ;93(19): 10459 UI - 3979 AU - Colwell DD AU - Dorchies P AU - Scholl PJ AU - Losson B AU - Boulard C AU - Chaudhury MF AU - Graf JF AU - Jacquiet P AU - Barillet E AU - Carta A AU - Scala A AU - Bowles VM AU - Sandeman RM AU - Cepeda-Palacios R AU - Wall R AU - Cruickshank I AU - French NP AU - Smith KE AU - Panadero-Fontan R AU - Otranto D AD - Agr & Agri Food Canada, Lethbridge Res Ctr, Lethbridge, AB T1J 4B1, CanadaEcole Natl Vet Toulouse, Interact Hotes Agents Pathogenes, Toulouse, FranceUniv Nebraska, USDA ARS, MLIRU, Lincoln, NE 68583, USAUniv Liege, Fac Vet Med, Lab Parasitol & Parasit Dis, Liege, BelgiumINRA, Unite Immunopathol Malad Parasitaires, F-37380 Nouzilly, FranceUSDA ARS, Screwworm Res Lab, Tuxtla Gutierrez, Chiapas, MexicoNovartis Anim Hlth Inc, CH-4002 Basel, SwitzerlandINRA, Stn Ameliorat Genet Anim, F-31326 Castanet Tolosan, FranceIst Zootecn & Vaseario Sardegna, Sassari, ItalySch Vet, Dept Parasitol, Sassari, ItalyUniv Melbourne, Ctr Anim Biotechnol, Parkville, Vic 3010, AustraliaLa Trobe Univ, Dept Agr Sci, Bundoora, Vic 3083, AustraliaUABCS, Dept Zootecn, La Paz 23080, BCS, MexicoUniv Bristol, Sch Biol Sci, Bristol BS8 1TH, Avon, EnglandUniv Liverpool, Dept Vet Clin Sci & Anim Husb, Liverpool L69 3BX, Merseyside, EnglandUniv Santiago de Compostela, Fac Vet, Dept Anim Pathol, Lugo 27002, SpainUniv Bari, Fac Vet Med, Dept Hlth & Anim Welf, I-70121 Bari, ItalyColwell, DD, Agr & Agri Food Canada, Lethbridge Res Ctr, 5403 1st Ave S, Lethbridge, AB T1J 4B1, Canada TI - Management of myiasis: current status and future prospects AB - The management of myiasis in livestock has been an example of the success of modem chemical approaches for parasite control, yet in some cases remains extremely intractable, requiring the development of novel strategies. In addition, the growing and urgent need to develop integrated strategies that enhance the sustainability of livestock production systems drives the search for new techniques [see Int. J. Parasitol. 29 (1999) 7]. The following summary represents a synthesis of a symposium presented at the 19th International Conference of the World Association for the Advancement of Veterinary Parasitology, New Orleans, USA, 10-14 August 2003. The coverage began with a review of the need for more subtle economic analysis of the impact of myiasis based on the use of the sterile insect technique (SIT) for control of bovine hypodermosis in North America. This was followed by a review of the status of chemical control with particular emphasis on the macrocyclic lactones. The outcome of the use of these compounds in a regulated control program for eradication of bovine hypodermosis in EU was surveyed. Similarly, the success of the screwworm eradication program, using the sterile insect technique has shown how effective this approach can be given the appropriate target. Several aspects of the development of newer approaches were surveyed in discussion of newer chemical control products, development of vaccines, use of host genetics, use of predictive simulation modelling and trapping for monitoring and control and the development of new diagnostic approaches for occult infestations. Finally, use of the latest molecular tools for identification of larvae causing myiasis and their use for the identification of species coming from different and distant geographical areas to colonize regions where they have been eradicated was reviewed MH - Australia MH - Belgium MH - Canada MH - United Kingdom MH - France MH - Italy MH - Mexico|Baja California Sur MH - Mexico|Chiapas MH - Spain MH - Switzerland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000224789000007 L2 - myiasis;growth regulators;vaccine development;genetic resistance;economic analysis;chemical control;macrocyclic lactones;attractant traps;eradication;Hypoderma;Lucilia;Oestrus;Cochliomyia;CIRCULATING HYPODERMIN-C; CATTLE GRUB HYPODERMA; LUCILIA-CUPRINA; BLOWFLY STRIKE; MOLECULAR CHARACTERIZATION; OESTRIDAE INFESTATIONS; BOVINE HYPODERMOSIS; SHEEP; DIPTERA; LINEATUM SO - Veterinary Parasitology 2004 ;125(1-2):93-104 10460 UI - 4669 AU - Comett I AU - Gonzalez-Martinez S AU - Wilderer P AD - Tech Univ Munich, Inst Water Qual Control & Waste Management, D-85748 Garching, GermanyNatl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoWilderer, P, Tech Univ Munich, Inst Water Qual Control & Waste Management, Coulombwall, D-85748 Garching, Germany TI - Treatment of leachate from the anaerobic fermentation of solid wastes using two biofilm support media AB - Biofilms growing on different carrier media have a different response to the nutrients contained in wastewater. Biofilms have proven to be an alternative to the treatment of wastewater containing higher concentrations of contaminants. The main objective of this research was to compare two biofilm support media for the treatment of leachate from the anaerobic fermentation of solid wastes. The removal of organic matter and ammonia was achieved in two fixed bed biofilm reactors containing Kaldness(R) and Linpor(R) support materials with specific surface areas of 490 and 270 m(2)/m(3), respectively, and operating under the sequencing batch procedure during 204 days. The Linpor reactor achieved higher total COD removal than the Kaldnes reactor (47% and 39%, respectively). Linpor was shown to be less sensitive to influent COD changes than Kaldnes. The effluent total COD values of Kaldnes were higher than Linpor. The dissolved COD removal was 21% for both reactors. The average ammonia removal for Linpor was 72% and 42% for Kaldnes. The matrix of Linpor allows higher concentrations of microorganisms (as dry mass) than Kaldnes. The dry mass concentration was related to the "active" exposed surface area of the biofilm. This is considered to be the cause for the better performance of Linpor when compared with Kaldnes MH - Germany MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000223258500039 L2 - ammonia removal;biofilm;Kaldnes;leachate;Linpor;PERFORMANCE; DIGESTERS SO - Water Science and Technology 2004 ;49(11-12):287-294 10461 UI - 3713 AU - Comim FA AU - Menemdez M AU - Herrera JA AD - CSIC, Inst Pirena Ecol, Zaragoza 50080, SpainUniv Barcelona, Dept Ecol, Barcelona, SpainCINVESTAV, IPN, Merida, Yucatan, MexicoComim, FA, CSIC, Inst Pirena Ecol, Avda Montanana 1005 Apdo 202, Zaragoza 50080, Spain TI - Spatial and temporal scales for monitoring coastal aquatic ecosystems AB - 1. Coastal ecology is mostly regulated by hydro-meteorological factors and human disturbances. The spatial and temporal scales of variation of the processes associated with these factors may not correlate. 2. Monitoring of water and ecosystem quality in the coastal zone must be performed at spatial and temporal scales that adequately address the objectives. They range between two extreme states, i.e. high water turnover due to surface water exchanges and evaporation driven turnover, and can cover a range of ecological situations depending on hydrological variables. 3. The spatial scale for monitoring coastal aquatic ecosystems may be better related to water masses circulation than to physiographic features. Biologically mediated processes require monitoring taking account of meteorological, seasonal and interannual time scales. 4. Variables to be monitored must be in accordance with objectives. They may range from intracompartment variables (e.g. demography of a biological population) to inter-zone relationships (e.g. budgets of nutrient exchange with the sea). Larger and longer scales, such as including buffer zones around lagoons and the continental and sea basins, and the consideration of interdecadal and secular time scales are required for wider monitoring perspectives. 5. Monitoring the impacts of global changes (both direct, such as urbanization and eutrophication of the coastal zone, and indirect, through relative sea-level rise due to climate change) requires a wider conceptual scale of approach to coastal zone ecology and even longer monitoring programmes. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Yucatan MH - Spain PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Marine & Freshwater Biology;Water Resources U5 - J;Article AV - English IS - 1052-7613 UR - ISI:000225589300002 L2 - coastal lagoons;estuaries;space;time;scales;monitoring;PHYTOPLANKTON; COMMUNITY SO - Aquatic Conservation-Marine and Freshwater Ecosystems 2004 ;14():S5-S17 10462 UI - 5508 AU - Comoglio LI AU - Gaxiola G AU - Roque A AU - Cuzon G AU - Amin O AD - Consejo Nacl Invest Cient & Tecn, CADIC, Ctr Austral Invest Cient, Tierra Del Fuego, ArgentinaUNAM, Fac Ciencias, Mexico City, DF, MexicoCtr Invest Alimentac & Desarrollo, Unidad Acuicultura & Manejo Ambiental, Mazatlan, Sinaloa, MexicoComoglio, LI, Consejo Nacl Invest Cient & Tecn, CADIC, Ctr Austral Invest Cient, Tierra Del Fuego, Argentina TI - The effect of starvation on refeeding, digestive enzyme activity, oxygen consumption, and ammonia excretion in juvenile white shrimp Litopenaeus vannamei AB - Juveniles of the white shrimp Litopenaeus vannamei were kept Without food for between 0 to 15 clays to evaluate the impact of starvation oil physiologic state (oxygen consumption, poststarvation refeeding, index, nitrogen excretion, and O:N ratio) and digestive enzymes activity. Physiologic changes were found after 6 days of fasting, and refeeding ability declined as a result. Nevertheless. the shrimp were able to Survive 16 days Without food. Starvation Caused metabolism to drop progressively toward a basal level (21 J (.) h(-1 .) g(-1)) and a decrease in the rate of ammonia excretion, because of the catabolism of amino acids front soluble protein in the hepatopancreas. This decrease led to an increase in digestive enzymes specific activity (U/mg protein). But, expressed as total U. all digestive enzyme activities decreased in the absence of substrate from 0.016 to 0.007 U/hepatopancreas (HP) for alpha-amylase and 2.58 to 0.63 U/HP for total trypsin. L. vannamei juveniles showed a true physiologic adaptation mechanism to food depiivation: no changes in body weight but loss in hepatosomatic index, no exuviations, including the utilization of HP soluble proteins (a drop from 269 to 53 mg/mL). After 10 days. a neoglycogenic pathway and the corresponding tissue enzymes activities seemed enhanced, and the animals derived all energetic Substrates mainly from protein (O:N ratio of 17) to cover their metabolic costs. Estimates of basal metabolism (Hem) from the routine respiration rate per clay (from 361 to 725 J (.) g ww(-1) (.) day(-1) through the 15-day starvation period). and loss of nonfecal energy (HxE) from the nitrogen excretion rate (varying from 39 to 57 J (.) g ww(-1) (.) day(-1) during the same period) were used in a bioenergetic partition model of a fasting juvenile. Which indicated that the energetic requirement to Survive Without feeding was in the range of 418 and 771 J (.) g ww(-1) (.) day(-1) during the 15-day period of starvation MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000221403900035 L2 - digestive enzymes;Litopenaeus vannamei;metabolic rate;shrimp;starvation;PRAWN PENAEUS-ESCULENTUS; HYAS-ARANEUS LARVAE; CRANGON-CRANGON L; BIOCHEMICAL-COMPOSITION; SUBSTRATE METABOLISM; PROLONGED STARVATION; TRYPSIN ACTIVITY; MOLT CYCLE; JAPONICUS; RESPIRATION SO - Journal of Shellfish Research 2004 ;23(1):243-249 10463 UI - 5426 AU - Conant-Pablos SE AU - Ikeuchi K AU - Martinez-Alfaro H AD - ITESM, Ctr Intelligent Syst, Mexico City, DF, Mexico. Univ Tokyo, Inst Ind Sci, Tokyo, Japan TI - A method to obtain sensing requirements in robotic assemblies by geometric reasoning AB - This paper presents a method for determining sensing requirements for robotic assemblies from a geometrical analysis of critical contact-state transitions produced among mating parts during the execution of nominal assembly plans. The goal is to support the reduction of real-life uncertainty through the recognition of assembly tasks that require force and visual feedback operations. The assembly tasks are decomposed into assembly skill primitives based on transitions described on a taxonomy of contact relations. Force feedback operations are described as a set of force compliance skills which are systematically associated to the assembly skill primitives. To determine the visual feedback operations and the type of visual information needed, a backward propagation process of geometrical constraints is used. This process defines new visual feedback requirements for the tasks from the discovery of direct, and indirect, insertion and contact dependencies among the mating parts. A computational implementation of the method was developed and validated with test cases containing assembly tasks including all the combinations of sensing requirements. The program behave as expected in every case MH - Japan MH - Mexico|Distrito Federal T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlesconant@itesm.mx ki@iis.u-tokyo.ac.jp hma@itesm.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600089 SO - 2004 ;():862-871 10464 UI - 4446 AU - Concellon JM AU - Riego E AU - Rivero IA AU - Ochoa A AD - Univ Oviedo, Fac Quim, Dept Quim Organ & Inorgan, Oviedo 33071, SpainCtr Grad & Invest, Inst Tecnol Tijuana, Tijuana 22000, BC, MexicoConcellon, JM, Univ Oviedo, Fac Quim, Dept Quim Organ & Inorgan, Julian Claveria 8, Oviedo 33071, Spain TI - Synthesis of chiral amino epoxyaziridines: Useful intermediates for the preparation of chiral trisubstituted piperidines AB - Chiral aminoalkyl epoxyaziridine 1 is synthesized in high yield and diastereoselectivity from L-serine. Ring opening of epoxyaziridine 1 with primary amines is carried out with total chemo- and regioselectivity, affording chiral polyfunctionalized piperidines 8. The structure of these trisubstituted piperidines is established by NMR studies MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000223897700010 L2 - DIASTEREOSELECTIVE SYNTHESIS; SUBSTITUTED PIPERIDINES; ASYMMETRIC-SYNTHESIS; STEREOSELECTIVE C-2; RECENT PROGRESS; ENANTIOPURE; AZIRIDINES; ALKALOIDS; EPOXIDES; CLEAVAGE SO - Journal of Organic Chemistry 2004 ;69(19):6244-6248 10465 UI - 4130 AU - Conradson SD AU - Begg BD AU - Clark DL AU - den Auwer C AU - Ding M AU - Dorhout PK AU - Espinosa-Faller FJ AU - Gordon PL AU - Haire RG AU - Hess NJ AU - Hess RF AU - Keogh DW AU - Morales LA AU - Neu MP AU - Paviet-Hartmann P AU - Runde W AU - Tait CD AU - Veirs DK AU - Villella PM AD - Los Alamos Natl Lab, Los Alamos, NM 87545, USAAustralian Nucl Sci & Technol Org, Menai, NSW 2264, AustraliaCommissariat Energie Atom Marcoule, F-30207 Bagnols Sur Ceze, FranceColorado State Univ, Ft Collins, CO 80523, USAOak Ridge Natl Lab, Oak Ridge, TN 37831, USACtr Marista Estudios Super, Merida, Yucatan, MexicoPacific NW Natl Lab, Richland, WA 99352, USAConradson, SD, Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545, USA TI - Local and nanoscale structure and speciation in the PuO2+x-y(OH)(2y)center dot zH(2)O system AB - Pu L-3 X-ray absorption fine structure spectra from 24 samples of Pu02+X (and two related Pu-substituted oxides), prepared by a variety of methods, demonstrate that (1) although the Pu sublattice remains the ordered part of the Pu distribution, the nearest-neighbor O atoms even at x = 0 are found in a multisite distribution with Pu-O distances consistent with the stable incorporation of OH- (and possibly H2O and H+) into the PuO2 lattice; (2) the excess O from oxidation is found at Pu-O distances <1.9 A, consistent with the multiply bound "oxo"-type ligands found in molecular complexes of Pu(V) and Pu(VI); (3) the Pu associated with these oxo groups is most likely Pu(V), so that the excess O probably occurs as PuO2+ moieties that are aperiodically distributed through the lattice; and (4) the collective interactions between these defect sites most likely cause them to cluster so as give nanoscale heterogeneity in the form of domains that may have unusual reactivity, observed as sequential oxidation by H2O at ambient conditions. The most accurate description of PuO2 is therefore actually PuO2+x-y(OH)(2y).zH(2)O, with pure, ordered, homogeneous PuO2 attained only when H2O is rigorously excluded and the O activity is relatively low MH - Australia MH - France MH - Mexico|Yucatan MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000224500000063 L2 - PLUTONIUM DIOXIDE; OXIDATION-KINETICS; WATER-ADSORPTION; URANIUM; LATTICE; SUPERCONDUCTORS; OXYGEN; SPECTROSCOPY; DIFFRACTION; SOLUBILITY SO - Journal of the American Chemical Society 2004 ;126(41):13443-13458 10466 UI - 6509 AU - Conradson SD AU - Abney KD AU - Begg BD AU - Brady ED AU - Clark DL AU - den Auwer C AU - Ding M AU - Dorhout PK AU - Espinosa-Faller FJ AU - Gordon PL AU - Haire RG AU - Hess NJ AU - Hess RF AU - Keogh DW AU - Lander GH AU - Lupinetti AJ AU - Morales LA AU - Neu MP AU - Palmer PD AU - Paviet-Hartmann P AU - Reilly SD AU - Runde WH AU - Tait CD AU - Veirs DK AU - Wastin F AD - Los Alamos Natl Lab, Mat Sci & Technol Div, Div Nucl Mat Technol, Div Chem, Los Alamos, NM 87545, USALos Alamos Natl Lab, Seanorg Inst Transactinum Studies, Los Alamos, NM 87545, USAAustralian Nucl Sci & Technol Org, Menai, NSW 2234, AustraliaCEA Marcoule, F-30207 Bagnols Sur Ceze, FranceColorado State Univ, Dept Chem, Ft Collins, CO 80523, USAMerista Univ, Sch Sci & Engn, Ctr Marista Estudios Super, Merida, Yucatan, MexicoOak Ridge Natl Lab, Oak Ridge, TN 37831, USAPacific NW Natl Lab, Richland, WA 99352, USACommiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, GermanyLos Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545, USALos Alamos Natl Lab, Div Chem, Los Alamos, NM 87545, USAConradson, SD, Los Alamos Natl Lab, Mat Sci & Technol Div, Div Nucl Mat Technol, Div Chem, MST-8 MS G755, Los Alamos, NM 87545 USA TI - Higher order speciation effects on plutonium L-3 X-ray absorption near edge spectra AB - Pu L-3 X-ray near edge absorption spectra for Pu(0-VII) are reported for more than 60 chalcogenides, chlorides, hydrates, hydroxides, nitrates, carbonates, oxy-hydroxides, and other compounds both as solids and in solution, and substituted in zirconolite, perovskite, and borosilicate glass. This large database extends the known correlations between the energy and shape of these spectra from the usual association of the XANES with valence and site symmetry to higher order chemical effects. Because of the large number of compounds of these different types, a number of novel and unexpected behaviors are observed, such as effects resulting from the medium and disorder that can be as large as those from valence MH - Australia MH - France MH - Germany MH - Mexico|Yucatan MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000187971500015 L2 - FINE-STRUCTURE SPECTROSCOPY; ELECTRONIC-STRUCTURE; ALKALINE-SOLUTION; ACTINIDE COMPOUNDS; NITRATE COMPLEXES; OXIDATION-STATES; SOLID-STATE; URANYL-ION; L-III; URANIUM SO - Inorganic Chemistry 2004 ;43(1):116-131 10467 UI - 6616 AU - Consonni G AU - Veronese P AU - Gutierrez-Pena E AD - L Bocconi Univ, Inst Quantitat Methods, I-20135 Milan, ItalyUniv Pavia, I-27100 Pavia, ItalyUNAM, IIMAS, Mexico City, DF, MexicoVeronese, P, L Bocconi Univ, Inst Quantitat Methods, Viale Isonzo 25, I-20135 Milan, Italy TI - Reference priors for exponential families with simple quadratic variance function AB - Reference analysis is one of the most successful general methods to derive noninformative prior distributions. In practice, however, reference priors are often difficult to obtain. Recently developed theory for conditionally reducible natural exponential families identifies an attractive reparameterization which allows one, among other things, to construct an enriched conjugate prior. In this paper, under the assumption that the variance function is simple quadratic, the order-invariant group reference prior for the above parameter is found. Furthermore, group reference priors for the mean- and natural parameter of the families are obtained. A brief discussion of the frequentist coverage properties is also presented. The theory is illustrated for the multinomial and negative-multinomial family. Posterior computations are especially straightforward due to the fact that the resulting reference distributions belong to the corresponding enriched conjugate family. A substantive application of the theory relates to the construction of reference priors for the Bayesian analysis of two-way contingency tables with respect to two alternative parameterizations. (C) 2003 Elsevier Inc. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0047-259X UR - ISI:000187437300008 L2 - Bayesian inference;conditional reducibility;contingency table;enriched conjugate prior;multinomial family;negative-multinomial family;noninformative prior;NONINFORMATIVE PRIORS; DIRICHLET DISTRIBUTION; BAYESIAN-INFERENCE; PARAMETER SO - Journal of Multivariate Analysis 2004 ;88(2):335-364 10468 UI - 5881 AU - Conte G AU - Urrutia-Fucugauchi J AU - Goguitchaixhvili A AU - Soler-Arechalde AM AU - Morton-Bermea O AU - Incoronato A AD - Natl Autonomous Univ Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Ciudada Univ, Mexico City 04510, DF, MexicoUniv Naples Federico II, Dept Earth Sci, Naples, ItalyUrrutia-Fucugauchi, J, Natl Autonomous Univ Mexico, Inst Geofis, Lab Paleomagnetismo & Geofis Nucl, Ciudada Univ, Mexico City 04510, DF, Mexico TI - Paleomagnetic study of lavas from the Popocateped volcanic region, central Mexico AB - Results are presented for a paleodirectional and paleointensity study of 16 Popocatepetl lava flows. Popocatepetl is a tall, active, dacitic-andesitic stratovolcano; it forms the southern end of a N-S-trending Quaternary volcanic range at the eastern edge of the Basin of Mexico. Studied units are mainly andesites and one trachyandestite, and all possess similar trace- and rare-earth-element compositions. Rock-magnetic experiments show that remanence is carried in most cases by Ti-poor titanomagnetite, resulting from oxy-exsolution of original titanomagnetite during flow cooling. Unblocking temperature spectra and high coercivities point to "small" pseudo-single domain magnetic grains for these (titano)magnetites. Single-component, linear demagnetization plots were observed in most cases. A strong, lightning-produced magnetization overprint was detected for one site. Combining the new paleomagnetic data provides a mean paleodirection of I = 35.4degrees, D = 345.7degrees, k = 21, alpha(95) = 8.5degrees, N = 15 for the Popocatepetl volcano region. All studied flows yield normal polarity magnetization, which supports a maximum age within the Brunhes chron. Twenty-five samples were selected for Thellier palaeointensity experiments based on magnetic properties, stable single-component remanent magnetizations, and reasonably reversible continuous thermomagnetic curves. Fourteen samples from four different flows yield reliable paleointensity estimates with the flow-mean virtual dipole moments (VDM) ranging from 5.9 to 9.2 x 10(22) Am-2. The NRM fractions used for paleointensity determination range from 35 to 96%, and the quality factors vary between 3.4 and 46.9, being normally greater than 6. Mean VDM obtained in this study is 7.2 +/- 1.4 x 10(22) Am-2, slightly lower than the present-day dipolar value MH - Italy MH - Mexico|Distrito Federal PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 1 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000220479400002 L2 - GEOMAGNETIC-FIELD; PALEOINTENSITIES; MAGNETITE; VALLEY; SIZE; TIME SO - International Geology Review 2004 ;46(3):210-225 10469 UI - 6343 AU - Contreras-Espinosa F AU - Warner BG AD - Univ Autonoma Metropolitana Iztapalapa, Dept Hydrobiol, Mexico City 09340, DF, MexicoUniv Waterloo, Wetlands Res Ctr, Waterloo, ON N2L 3G1, CanadaContreras-Espinosa, F, Univ Autonoma Metropolitana Iztapalapa, Dept Hydrobiol, AP-55-535,Av S Rafael Atlixco 186, Mexico City 09340, DF, Mexico TI - Ecosystem characteristics and management considerations for coastal wetlands in Mexico AB - Ecological parameters characterizing physico-chemical and biological conditions were collected from a total of 29 representative wetlands that occur between the near-shore terrestrial ecosystems and the outer edge of the tidal zone along the coasts of Mexico. This total includes about 40% of the total extent of coastal wetlands in Mexico. It is possible to recognize four distinct groups of wetlands based largely on the salinity gradients: oligohaline (0-10 ppt), estuarine (10-30 ppt), euhaline (30-40 ppt), and hyperhaline (> 40 ppt). Estuarine wetlands are the most abundant and widespread group. Oligohaline wetlands are more common in the south and the hyperhaline wetlands are more common along the north coasts of Mexico. Euhaline systems are in specialized localities scattered along both coasts. Human activities and development pressures continue to threaten the coastal wetlands in Mexico. This paper presents the first survey of ecological characteristics of the coastal wetlands in Mexico. These data highlight the range of variability that exists, demonstrates problems such as eutrophication, and provides a basis for future more detailed biomonitoring, management and conservation programs for these highly vulnerable and economically important ecosystems in Mexico MH - Canada MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000188667300018 L2 - wetlands;mangroves;ecosystem productivity;Mexico;wetland management SO - Hydrobiologia 2004 ;511(1):233-245 10470 UI - 3175 AU - Contreras-Esquivel JC AU - Montanez JC AU - Wicker L AD - Univ Autonoma Coahuila, Sch Chem, Food Res Dept, Saltillo 25001, Coahuila, MexicoUniv Georgia, Dept Food Sci & Technol, Athens, GA 30602, USA TI - Extraction and characterization of pectins from novel sources MH - Mexico|Coahuila MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223712800162 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U52-U52 10471 UI - 6104 AU - Contreras-Jurado C AU - Gonzalez-Martinez MT AU - Cobos EJ AU - Soler-Diaz A AD - Univ Granada, Fac Med, Dept Fisiol, E-18012 Granada, SpainUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoUniv Granada, Fac Med, Dept Farmacol, E-18012 Granada, SpainUniv Granada, Inst Biotecnol, E-18012 Granada, SpainSoler-Diaz, A, Univ Granada, Fac Med, Dept Fisiol, Avda Madrid 13, E-18012 Granada, Spain TI - Fluorometric evidence for different stoichiometries for the Na+/Mg2+ exchange in Mg-loaded rat thymocytes AB - The regulation of the cytosolic free magnesium concentration ([Mg2+](i)) is a fundamental cellular process that requires magnesium extruding mechanisms. Here, we present evidence indicating that rat thymocytes are endowed with different Na/Mg exchange systems. Fluxes of magnesium were measured using the fluorescent magnesium indicator magfura-2. Cells were loaded with magnesium using the calcium ionophore A-23187 to 0.6-8.0 mM [Mg2+](i) (resting [Mg2+](i) = 0.38 = 0.06 mM, n = 5). The presence of extracellular sodium was required for magnesium exit. The initial rate of [Mg2+](i) was stimulated by extracellular sodium with Michaelis-Menten kinetics. The Vmax of the sodium-dependent magnesium exit was markedly increased by [Mg2+](i). Holding the membrane potential at either -84 mV or at -10 mV had different effects on the sodium-stimulated magnesium efflux, depending on the extracellular sodium concentration ([Na+](o)). At 10-30 mM [Na+](o), the magnesium efflux was faster at - 10 mV than at -84 mV. Conversely, at 50-200 mM [Na+](o), the efflux of magnesium was faster at -84 mV that at -10 mV. At 75 mM [Na+](o), the activities where nearly the same at both membrane potential values. These observations suggest that the stochiometry of the Na+/Mg2+ exchange changes with [Na+](o) MH - Mexico|Distrito Federal MH - Spain PB - MANHASSET: FRONTIERS IN BIOSCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1093-9946 UR - ISI:000189333700067 L2 - intracellular magnesium;Na/Mg exchange;mag fura 2;membrane potential;thymocytes;MAGNESIUM; CELLS; EFFLUX; NA+ SO - Frontiers in Bioscience 2004 ;9():1843-1848 10472 UI - 5317 AU - Contreras A AU - Lopez VH AU - Bedolla E AD - Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoUniv Nottingham, Adv Mat Grp, Sch Mech Mat & Mfg Engn, Nottingham NG7 2RD, EnglandUMSNH, Inst Invest Met, Morelia, Michoacan, MexicoContreras, A, Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas 152,San Bartolo Atepehua, Mexico City 07730, DF, Mexico TI - Mg/TiC composites manufactured by pressureless melt infiltration AB - Molten Mg was pressurelessly infiltrated into TiC preforms (56 vol.%) under flowing Ar at temperatures of 850, 900 and 950 degreesC. The rate of infiltration exhibited a strong temperature dependency. The mechanical strength of the composites increased from 172 to 233 MPa for processing temperatures of 850 and 950 degreesC, respectively. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000221848000011 L2 - metal-matrix composites (MMCs);TiC;Mg;liquid metal infiltration;MG; AL; WETTABILITY; ALUMINUM; KINETICS SO - Scripta Materialia 2004 ;51(3):249-253 10473 UI - 3693 AU - Contreras G AU - Oliveira F AD - CIMAT, Guanajuato 36000, GTO, MexicoUniv Fed Minas Gerais, Dept Matemat, Inst Ciencias Exatas, BR-30161970 Belo Horizonte, MG, BrazilContreras, G, CIMAT, POB 402, Guanajuato 36000, GTO, Mexico TI - C-2 densely the 2-sphere has an elliptic closed geodesic AB - We prove that a Riemannian metric on the 2-sphere or the projective plane can be C-2 approximated by a C-infinity metric whose geodesic flow has an elliptic closed geodesic MH - Brazil MH - Mexico|Guanajuato PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0143-3857 UR - ISI:000225580000007 L2 - HYPERBOLIC FLOWS; PERIODIC POINTS; DYNAMICS; MANIFOLDS; THEOREM SO - Ergodic Theory and Dynamical Systems 2004 ;24():1395-1423 10474 UI - 5932 AU - Contreras G AU - Macarini L AU - Paternain GP AD - CIMAT, Guanajuato 3600, MexicoIMPA, BR-22460320 Rio De Janeiro, BrazilUniv Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WB, EnglandContreras, G, CIMAT, AP 402, Guanajuato 3600, Mexico TI - Periodic orbits for exact magnetic flows on surfaces MH - Brazil MH - United Kingdom MH - Mexico|Guanajuato PB - CAYAHOGA FALLS: HINDAWI PUBLISHING CORPORATION RP - NOT IN FILE U3 - TC 7 U4 - Mathematics U5 - J;Article AV - English IS - 1073-7928 UR - ISI:000220353900001 L2 - LAGRANGIAN SYSTEMS; CRITICAL-VALUES; MINIMIZING MEASURES; CLOSED EXTREMALS; FUNCTIONALS; MANIFOLDS SO - International Mathematics Research Notices 2004 ;(8):361-387 10475 UI - 4339 AU - Cooper-DeHoff RM AU - Handberg EM AU - Cohen J AU - Kowey P AU - Messerli FH AU - Manci G AU - Cangiano JL AU - Gaxiola E AU - Garcia-Barreto D AU - Hewkin AC AU - Pepine CJ AD - Univ Florida, Div Cardiovasc Med, Gainesville, FL 32610, USAUniv Florida, Coll Med, Gainesville, FL 32610, USASt Louis Univ, St Louis, MO 63103, USALankenau Hosp, Wynnewood, PA, USAOchsner Clin & Alton Ochsner Med Fdn, New Orleans, LA, USAUniv Milan, Milan, ItalyInst Cardiovasc Guadalajara, Jalisco, MexicoInst Cardiol & Cirurg Cardiovasc, Havana, CubaAbbott Labs, Abbott Pk, IL 60064, USACooper-DeHoff, RM, Univ Florida, Div Cardiovasc Med, 1600 SW Archer Rd,POB 100277, Gainesville, FL 32610 USA TI - Characteristics of contemporary patients with hypertension and coronary artery disease AB - Background: Despite a high prevalence of hypertension in the population with CAD, there are limited data describing the clinical characteristics and treatments, as well as their interrelations in these patients. This is particularly true for black and Hispanic patients who have been underrepresented in randomized CAD trials. Hypothesis: There exist racial and ethnic differences that define the characteristics of patients with both coronary artery disease (CAD) and hypertension. Methods: This report describes the characteristics of Caucasian, Hispanic, and black patients enrolled in the International Verapamil SR/trandolapril Study (INVEST), a prospective trial undertaken exclusively in patients with CAD and hypertension. Results: In all, 10,925 Caucasian, 8,045 Hispanic, and 3.029 black patients are described. An abnormal angiogram or documented myocardial infarction was observed more frequently in Caucasian patients (73%), while angina pectoris was more prevalent in Hispanic patients (87%). Diabetes and left ventricular hypertrophy were most common in black patients (33 and 29%, respectively), while hypercholesterolemia and prior revascularization (coronary artery bypass graft or angioplasty) were most common in Caucasian patients (64 and 41%, respectively). More than 60% of Hispanic and black patients were women-a unique characteristic for randomized CAD trials. Comparing race/ethnic cohorts, there were significant differences for all characteristics. More than 80% of patients in all race/ethnic groups were receiving antihypertensive therapy; however, only fewer than 25% had controlled blood pressure according to guidelines from the sixth report of the Joint National Committee on Prevention, Detection, Evaluation and Treatment of High Blood Pressure. Conclusions: This high-risk population of hypertensive patients with CAD has been undertreated and does not have well-controlled BP. Race/ethnic differences were observed for clinical characteristics and medication use MH - Cuba MH - USA MH - Italy MH - Mexico|Jalisco PB - MAHWAH: CLINICAL CARDIOLOGY PUBL CO RP - NOT IN FILE U3 - TC 3 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0160-9289 UR - ISI:000224117600018 L2 - coronary artery disease;hypertension;comorbidity;blood pressure control;Hispanic;black;CONVERTING-ENZYME-INHIBITOR; BASE-LINE CHARACTERISTICS; LIPID-LOWERING TREATMENT; CALCIUM-CHANNEL BLOCKER; ATTACK TRIAL ALLHAT; RANDOMIZED-TRIAL; CARDIOVASCULAR MORBIDITY; CONVINCE TRIAL; MORTALITY; INTERVENTION SO - Clinical Cardiology 2004 ;27(10):571-576 10476 UI - 3698 AU - Corbera M AU - Llibre J AU - Perez-Chavela E AD - Univ Vic, Dept Informat & Matemat, Escola Politecn Super, Barcelona 08500, SpainUniv Autonoma Barcelona, Dept Matemat, Bellaterra 08193, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoCorbera, M, Univ Vic, Dept Informat & Matemat, Escola Politecn Super, C Laura 13, Barcelona 08500, Spain TI - Equilibrium points and central configurations for the Lennard-Jones 2-and 3-body problems AB - In this paper we study the relative equilibria and their stability for a system of three point particles moving under the action of a Lennard-Jones potential. A central configuration is a special position of the particles where the position and acceleration vectors of each particle are proportional, and the constant of proportionality is the same for all particles. Since the Lennard-Jones potential depends only on the mutual distances among the particles, it is invariant under rotations. In a rotating frame the orbits coming from central configurations become equilibrium points, the relative equilibria. Due to the form of the potential, the relative equilibria depend on the size of the system, that is, depend strongly of the momentum of inertia I. In this work we characterize the relative equilibria, we find the bifurcation values of I for which the number of relative equilibria is changing, we also analyze the stability of the relative equilibria MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0923-2958 UR - ISI:000225691600002 L2 - central configurations;relative equilibria;spectral stability SO - Celestial Mechanics & Dynamical Astronomy 2004 ;89(3):235-266 10477 UI - 3870 AU - Cordero RR AU - Martinez A AU - Rodriguez-Vera R AU - Roth P AD - Escuela Super Politecn Litoral, Fac Mech & Prod Sci Engn, Guayaquil, EcuadorPontificia Univ Catolica Chile, Dept Mech & Met Engn, Santiago 4860, ChileCtr Invest Opt, Leon 37000, Gto, MexicoUniv Tecn Federico Santa Maria, Dept Mech Engn, Valparaiso, ChileCordero, RR, Escuela Super Politecn Litoral, Fac Mech & Prod Sci Engn, Km 30,5 Via Perimetral, Guayaquil, Ecuador TI - Uncertainty evaluation of displacements measured by electronic speckle-pattern interferometry AB - We have applied electronic speckle-pattern interferometry (ESPI), a whole-field optical technique, to measure the displacements induced by applying tensile load on a metallic sheet sample. because we used a dual-beam ESPI interferometer with collimated incident beams, our measurements were affected by errors in the collimation and in the alignment of the illuminating beams of the optical setup. In this paper, the influences of these errors are characterized and compared with other systematic effects through an uncertainty analysis. We found that the displacement uncertainty depends strongly on the incidence angles of the illuminating beams of the interferometer. Moreover, faults in the alignment of the incident beams have more influence on the uncertainty than errors in their collimation. The latter errors change the incident beams from collimated to slightly divergent, modifying in turn the interferometer sensitivity. We found that this sensitivity change can be generally neglected. (C) 2004 Elsevier B.V. All rights reserved MH - Chile MH - Ecuador MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000224935200007 L2 - speckle interferometry;displacement measurements;uncertainty analysis;PHASE-SHIFTING INTERFEROMETRY; ERROR-COMPENSATING ALGORITHMS; WAVE-FRONT; MOIRE SO - Optics Communications 2004 ;241(4-6):279-292 10478 UI - 4307 AU - Cordero S AU - Kornhauser I AU - Dominguez A AU - Felipe C AU - Esparza JM AU - Rojas F AU - Lopez RH AU - Vidales AM AU - Riccardo JL AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, RA-5700 San Luis, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-5700 San Luis, ArgentinaCordero, S, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Review: Site-bond network modeling of disordered porous media AB - The description of disordered porous media through the Dual Site-Bond Model (DSBM) is reviewed and updated with the inclusion of new results. After a brief discussion of the DSBM, the percolation properties of networks are studied. These present novel features with respect to classical percolation in non-correlated net- works. These properties are then used in discussing different processes in disordered porous media, namely, invasion percolation and adsorption-desorption hysteresis. Finally, a method for the characterization of pore size distributions from experimental adsorption-desorption isotherms is proposed MH - Argentina MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical;Materials Science, Characterization & Testing U5 - J;Review AV - English IS - 0934-0866 UR - ISI:000224003300004 L2 - adsorption-desorption;Dual Site-Bond Model;percolation;porous media;ADSORPTION-DESORPTION HYSTERESIS; INVASION PERCOLATION; CAPILLARY CONDENSATION; NITROGEN SORPTION; DOMAIN COMPLEXIONS; BOUNDARY CURVE; PORE-LEVEL; SURFACES; SOLIDS; SIMULATION SO - Particle & Particle Systems Characterization 2004 ;21(2):101-116 10479 UI - 4486 AU - Cordero S AU - Dominguez A AU - Kornhauser I AU - Lopez RH AU - Rojas F AU - Vidales AM AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City, DF, MexicoUniv Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, RA-5700 San Luis, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Dept Quim, DH Everett Chair, Mexico City, DF, MexicoZgrablich, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City, DF, Mexico TI - On the universal behavior of sorption isotherms in disordered mesoporous solids AB - Adsorption-desorption isotherms in disordered mesoporous solids, described by the Dual Site-Bond Model, are obtained through Monte Carlo simulations and their behavior is correlated to the topological properties of the porous networks and to their percolation properties, extending previous results to the general case of variable connectivity networks. A quasi-universal curve is found which may be useful in the problem of obtaining pore size distributions from the analysis of experimental Adsorption-desorption isotherms. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000223714100007 L2 - percolation in porous media;dual site-bond model;Monte Carlo simulation;universal sorption behavior;ADSORPTION-DESORPTION HYSTERESIS; PORE-SIZE DISTRIBUTION; SITE-BOND PERCOLATION; POROUS-MEDIA; INVASION PERCOLATION; NITROGEN SORPTION; NETWORKS; DISPERSION; SIMULATION; DRAINAGE SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2004 ;241(1-3):47-52 10480 UI - 4513 AU - Cordoba-Aguilar A AU - Siva-Jothy MT AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Sheffield, Dept Anim & Plant Sci, Evolutionary Ecol Grp, Sheffield S10 2TN, S Yorkshire, EnglandCordoba-Aguilar, A, Univ Nacl Autonoma Mexico, Inst Ecol, Circuito Eterior S-N,Apdo Postal 70-275, Mexico City 04510, DF, Mexico TI - Sperm displacement ability in Calopteryx haemorrhoidalis (Vander linden): Male and female roles, male limits in performance, and female neural control (Zygoptera : Calopterygidae) AB - During copulation, C haemorrhoidalis males displace the sperm of rivals stored by the female. During displacement, sperm stored in 2 spermathecae are ejected by the female as a consequence of male genitalic stimulation: the aedeagus distorts 2 vaginal plates in which mechanoreceptive sensilla are embedded. The sensilla control spermathecal sperm release and a wider aedeagus displaces more sperm. There is variation between female female in their sensillum number which might also affect sperm displacement rate. The role of sensillum number and aedeagal width in sperm displacement variation in copulations whose duration was controlled was investigated. Results indicated that only aedeagal width could predict sperm displacement variation. The neural communication between the vaginal plates and both spermathecae was also examined. Previous observations suggested a "lateral" control of sperm ejection between each vaginal plate and its corresponding spermatheca. This was corroborated by stimulating the mechanoreceptive sensilla of female female that underwent different surgical treatments: only those female female whose vaginal plate nerves were cut, showed no volumetric decline in sperm in the corresponding spermatheca. Finally, the effect of copula duration (number of aedeagal copulatory movements) on sperm ejection was experimentally examined. In natural conditions, males perform approximately 50 aedeagal movements during copulation. There was no difference in sperm volumes between the pairs of female female that were subjected to 50 and 80 aedeagal movements of stimulation using the same aedeagus. These results help to understand the nature of the spermathecal sperm displacement mechanism in this sp MH - United Kingdom MH - Mexico|Distrito Federal PB - BILTHOVEN: SOCIETAS INTERNATIONALIS ODONATOLOGICA RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0375-0183 UR - ISI:000223644400002 L2 - ALTERNANS BOHEMAN COLEOPTERA; COPULATION DURATION; GENITAL MORPHOLOGY; SEXUAL SELECTION; DRYOMYZA-ANILIS; ANIMAL GENITALIA; STORAGE ORGANS; WATER STRIDER; EVOLUTION; COMPETITION SO - Odonatologica 2004 ;33(3):245-252 10481 UI - 4783 AU - Cordoba R AU - Csaky AG AU - Plumet J AU - Ortiz FL AU - Herrera R AU - Jimenez-Vazquez HA AU - Tamariz J AD - Univ Complutense, Fac Quim, Dept Quim Organ, E-28040 Madrid, SpainUniv Almeria, Area Quim Organ, Almeria 04120, SpainUniv Michoacana, Inst Invest Quim Biol, Morelia 58066, Michoacan, MexicoInst Politecn Nacl, Excuela Nacl Ciencias Biol, Mexico City, DF, MexicoCsaky, AG, Univ Complutense, Fac Quim, Dept Quim Organ, E-28040 Madrid, Spain TI - The reaction of spiroepoxycyclohexadienones towards cyanide nucleophiles AB - The reaction of spiroepoxycyclohexadienones 1 with TMSCN in the presence of catalytic amounts of Bu4NCN results in the formation of two diastereomeric cyanohydrins. Alternatively, the reaction of I with equimolecular amounts of Bu4NCN gave rise to products arising from two other different reaction paths. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000220842700011 L2 - epoxides;catalysis;cyanides;SELECTIVE IRREVERSIBLE INHIBITOR; NEUTRAL SPHINGOMYELINASE; SILICON SO - Tetrahedron 2004 ;60(17):3825-3830 10482 UI - 6260 AU - Coreno-Alonso O AU - Duffus-Scott A AU - Zanchez-Cornejo C AU - Coreno-Alonso J AU - Sanchez-de Jesus F AU - Bolarin-Miro A AD - Univ Autonoma Estado Hidalgo, Ctr Invest Mat & Met, Cuidad Univ, Hidalgo, MexicoUniv Cent Las Villas, Ctr Invest Soldadura, Santa Clara De La Villas, CubaUniv Michoacana San Nicolas Hidalgo, Inst Invest Met, Morelia, Michoacan, MexicoCoreno-Alonso, O, Univ Autonoma Estado Hidalgo, Ctr Invest Mat & Met, Cuidad Univ, Carretera Pachuca Tulancingo KM 4-5 Pachuca, Hidalgo, Mexico TI - On the effect of sigma-phase formation during metal dusting AB - Changes in microstructure and mechanical properties have been characterized in HK-40 steel subjected to high-temperature corrosion by metal dusting. Samples with several grades of corrosion were analyzed. sigma-Phase precipitation and growth caused Cr and Si depletion in the surrounding metallic matrix next to it, which in turn reduced HK-40 metal dusting resistance. Average C content increased from 0.40 in the as-cast material, to 0.49 in samples with medium and high grades of metal dusting, due to C diffusion through the carbide layer present in the inner surface. In the samples, inner edge R-B hardness reduced from 99 R-B, in a sample with negligible metal dusting, to around 60 in one with severe metal dusting attack. This hardness reduction was mainly associated to a process of carbide precipitation and growth that took place as C diffused into the samples. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Hidalgo MH - Mexico|Michoacan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0254-0584 UR - ISI:000188857400005 L2 - corrosion;microstructure;heat resistant steels;hardness;CARBIDE PRECIPITATION; OXIDE SCALES; PROTECTION; STEELS; ALLOY SO - Materials Chemistry and Physics 2004 ;84(1):20-28 10483 UI - 6027 AU - Coria-Avila GA AU - Pfaus JG AU - Hernandez ME AU - Manzo J AU - Pacheco P AD - Concordia Univ, Dept Psychol, Ctr Studies Behav Neurobiol, Montreal, PQ H4B 1R6, CanadaUniv Veracruzana, Inst Neuroetol, Veracruz 91000, MexicoNatl Autonomous Univ Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoCoria-Avila, GA, Concordia Univ, Dept Psychol, Ctr Studies Behav Neurobiol, 7141 Sherbrooke St, Montreal, PQ H4B 1R6, Canada TI - Timing between ejaculations changes paternity success AB - It is believed that when two male rats copulate with a single female, the last one that ejaculates fathers significantly more pups than the first one. To determine the effects of order and elapsed time between two males copulating with the same female, albino Wistar (W) and pigmented Long-Evans (LE) male rats copulated with a W female. Paternity was confirmed by the pups' pigmentation. Three groups were made according to the elapsed time between the first male's ejaculation and the placement of the female with the second male; TO (0-min group); T5 (5-min group); and T10 (10-min group). Male order was counterbalanced in each group. The results showed that the second male had the advantage in T0, but the first males had the advantage in T5 and T10. These data indicate that in a two-male situation, the advantage in paternity for a second male occurs only during copulations following the first few minutes of a first male's ejaculation. After 5 min, a second male has no advantage in fathering pups. (C) 2004 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000220131600019 L2 - sexual competition;copulatory behavior;vagino-uterine reflex;seminal plug;sperm transport;STRIATED PENILE MUSCLES; COPULATORY-BEHAVIOR; SPERM COMPETITION; LABORATORY RATS; PREGNANCY; REPRODUCTION; TRANSPORT; REFLEXES SO - Physiology & Behavior 2004 ;80(5):733-737 10484 UI - 4279 AU - Corichi A AU - Cortez J AU - Quevedo H AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Mississippi, Dept Phys & Astron, Mississippi State, MS 38677, USAUniv Calif Davis, Dept Phys, Davis, CA 95616, USACorichi, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - Schrodinger and Fock representation for a field theory on curved spacetime AB - Linear free field theories are one of the few quantum field theories that are exactly soluble. There are, however, (at least) two very different languages to describe them, Fock space methods and the Schrodinger functional description. In this paper, the precise sense in which the two representations are related is explored. Several properties of these representations are studied, among them the well-known fact that the Schrodinger counterpart of the usual Fock representation is described by a Gaussian measure. A real scalar field theory is considered, both on Minkowski spacetime for arbitrary, non-inertial embeddings of the Cauchy surface, and for arbitrary (globally hyperbolic) curved spacetimes. We present both the Gaussian representation with a non-trivial measure and the homogeneous representation where the nontriviality lies in the vacuum state. As concrete examples, the Schrodinger representations on stationary and homogeneous cosmological spacetimes are constructed. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000224184900007 L2 - quantum field theory;Fock representation;Schrodinger representation;SOLUBLE MIDI-SUPERSPACES; CANONICAL QUANTIZATION; QUANTUM-GRAVITY; WAVES SO - Annals of Physics 2004 ;313(2):446-478 10485 UI - 5543 AU - Corichi A AU - Gomberoff A AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCtr Estudios Cient, Valdivia, ChileCorichi, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, A Postal 70-543, Mexico City 04510, DF, Mexico TI - Black holes in de Sitter space: Masses, energies, and entropy bounds AB - In this paper we consider spacetimes in vacuum general relativity-possibly coupled to a scalar field-with a positive cosmological constant Delta. We employ the isolated horizons (IH) formalism where the boundary conditions imposed are that of two horizons, one of black hole type and the other, serving as outer boundary, a cosmological horizon. As particular cases, we consider the Schwarzschild-de Sitter spacetime, in both 2 + 1 and 3 + 1 dimensions. Within the IH formalism, it is useful to define two different notions of energy for the cosmological horizon, namely, the "mass" and the "energy." Empty de Sitter space provides a striking example of such a distinction: its horizon energy is zero but the horizon mass takes a finite value given by pi(2 root/A). For both horizons we study their thermodynamic properties, compare our results with those of Euclidean Hamiltonian methods and construct some generalized Bekenstein entropy bounds. We discuss these new entropy bounds and compare them with some recently proposed entropy bounds in the cosmological setting MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000221258900048 L2 - CARDY-VERLINDE FORMULA; ISOLATED HORIZONS; SITTER SPACETIMES; PARTICLE CREATION; QUANTUM GEOMETRY; GRAVITY; THERMODYNAMICS; SCHWARZSCHILD; COUPLINGS; CONSTANT SO - Physical Review D 2004 ;69(6): 10486 UI - 5348 AU - Corma A AU - Melo FV AU - Sauvanaud L AU - Ortega FJ AD - Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, SpainInst Mexicano Petr, Mexico City 77030, DF, MexicoCorma, A, Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Ave Naranjos S-N, Valencia 46022, Spain TI - Different process schemes for converting light straight run and fluid catalytic cracking naphthas in a FCC unit for maximum propylene production AB - Light straight run (LSR) and fluid catalytic cracking (FCCN) naphthas were cracked in a transported bed reactor (MicroDowner) and in a fixed bed reactor (MAT) over a commercial Y zeolite based catalyst, over a commercial ZSM-5 zeolite based additive, and over a mixture of both at selected conditions. Based on the mechanisms through which naphtha hydrocarbons are converted, we evaluated the best alternatives for processing these streams to produce light olefins and/or to reduce olefins content in commercial gasoline. The experimental set-up allowed us to simulate the cracking behaviour of the different naphtha streams in a fluid catalytic cracking (FCC) unit by different processing schemes. Results indicate that LSR only cracks at high severity, yielding large amounts of dry gas. Despite its high olefins content, FCCN practically does not crack when it is fed together with gas oil feed. When cracking FCCN alone at typical gas oil cracking conditions, olefins are transformed preferentially into naphtha-range isoparaffins and aromatics, and when cracking FCCN at high severity, olefins are transformed preferentially into propylene and butylenes. Finally, cracking naphtha in the stripper produces some propylene and increases the aromatics in the remaining gasoline. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000221855400007 L2 - cracking;naphtha cracking;hydrogen transfer;olefins reduction;gasoline improvement;MECHANISM SO - Applied Catalysis A-General 2004 ;265(2):195-206 10487 UI - 5821 AU - Corona T AU - Poser C AD - Inst Nacl Neurol & Neurocirugia Insurgentes Sur, Direcc Ensenanza, Mexico City 3877, DF, MexicoHarvard Univ, Sch Med, Boston, MA 02115, USACorona, T, Inst Nacl Neurol & Neurocirugia Insurgentes Sur, Direcc Ensenanza, Mexico City 3877, DF, Mexico TI - Jacqueline Du Pre - Talent and disease MH - Mexico|Distrito Federal MH - USA PB - BARCELONA: S T M EDITORES, S A RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Letter AV - English IS - 0213-4853 UR - ISI:000220541600010 SO - Neurologia 2004 ;19(2):85-85 10488 UI - 4068 AU - Correa-Rotter R AU - Naicker S AU - Katz IJ AU - Agarwal SK AU - Valdes RH AU - Kaseje D AU - Rodriguez-Iturbe B AU - Shaheen F AU - Sitthi-Amorn C AD - Inst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoJohannesburg Hosp, Johannesburg, South AfricaChris Hani Baragwanath Nephrol Unit, Norwood, South AfricaAIIMS, New Delhi, IndiaInst Nefrol, Havana, CubaTrop Inst Community Hlth & Dev Africa, Kisumu, KenyaUniv Zulia, Univ Hosp, Maracaibo 4011, VenezuelaSaudi Ctr Organ Transplantat, Jeddah, Saudi ArabiaChulalongkorn Univ, Inst Hlth Res, Bangkok, ThailandCorrea-Rotter, R, Inst Nacl Nutr Salvador Zubiran, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Demographic and epidemiologic transition in the developing world: Role of albuminuria in the early diagnosis and prevention of renal and cardiovascular disease AB - The developing world is facing a real pandemic of renal and cardiovascular disease. With the decrease of infectious disease morbidity and mortality, and the exposure to more westernized life style, signs of increasing renal and cardiovascular disease is particularly shown in the tremendous rise in type 2 diabetes and its sequelae. A group of doctors and scientists from all over the world have convened in Bellagio to halt this dramatic disease change and burden to the developing countries. They came to the conclusion that screening and treatment should clearly focus on cost-beneficial strategies, among which blood pressure and urinary albumin measurement, as well as effective and affordable treatment strategies to lower blood pressure and albuminuria, are essential MH - Cuba MH - India MH - Kenya MH - Mexico|Distrito Federal MH - Saudi Arabia MH - South Africa MH - Thailand MH - Venezuela PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 3 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000224751000009 L2 - microalbuminuria;kidney disease;diabetes mellitus;epidemic;developing world;type 2 diabetes;TYPE-2 DIABETES-MELLITUS; ECONOMIC-EVALUATION; RISK-FACTORS; NEPHROPATHY; MICROALBUMINURIA; POPULATION; IRBESARTAN; RENOPROTECTION; PERSPECTIVE; PREVALENCE SO - Kidney International 2004 ;66():S32-S37 10489 UI - 4862 AU - Correa RJ AU - Sousa-Aguiar EF AU - Ramirez-Solis A AU - Zicovich-Wilson C AU - Moto CJA AD - Univ Fed Rio de Janeiro, Inst Quim, BR-21949900 Rio De Janeiro, BrazilPetrobras SA, CENPES, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoMoto, CJA, Univ Fed Rio de Janeiro, Inst Quim, Cidade Univ CT Bloco A, BR-21949900 Rio De Janeiro, Brazil TI - DFT cluster calculations for alkali cation-exchanged zeolites interacting with ethylchloride and HCI AB - T-5 and T-8 clusters (T = Si, Al) were used to calculate the structure of alkali cation-exchanged zeolites using DFT-based methods. The activity of basic zeolites was estimated from reactions with HCl and ethylchloride proton elimination. For the first case, all of the zeolite clusters reacted exothermically, with LiT5 presenting a DeltaH = -29.7 kcal/mol and CsT5 showing a DeltaH = -24.7 kcal/mol at the B3LYP/6-311+G** level of theory. For the proton elimination from ethylchloride to form ethene, only the LiT5 cluster had an exothermic reaction. The other clusters had a DeltaH varying from +0.1 kcal/mol for NaT5 to +2.3 kcal/mol for CsT5. The activation barriers for this reaction increased from Li to Cs. A careful analysis of the geometries, charges, and energetics for adsorption and activation barriers has shown that the reaction is controlled by the Lewis acid/base interaction between the cation and the chloride ion, not involving the Bronsted basicity of the framework oxygen atoms. These reactions proceed through a concerted mechanism that simultaneously involves the zeolitic basic framework oxygen atoms and the cation, which acts as a Lewis acid MH - Brazil MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000222864200010 L2 - BASE CATALYSIS; BASICITY; ADSORPTION; REACTIVITY; PYRROLE; PAIRS; HARD SO - Journal of Physical Chemistry B 2004 ;108(30):10658-10662 10490 UI - 4540 AU - Corro G AU - Fierro JLG AU - Montiel R AU - Banuelos F AD - Benemerita Univ Autonoma Puebla, Inst Ciencias, Puebla 72570, MexicoCSIC, Inst Catalisis & Petr Quim, Madrid 28049, SpainCorro, G, Benemerita Univ Autonoma Puebla, Inst Ciencias, 14 Sur 6301, Puebla 72570, Mexico TI - Catalytic performance of Pt-Sn/gamma-Al2O3 for particulates emission prevention AB - Carbon residues deposited on Pt/gamma-Al2O3 and Pt-Sn/gamma-Al2O3 both pre-sulfated, after 12 h Of C3H8-NO-O-2-SO2 reaction were evaluated to determine the effect of Sn addition and of sulfates formation over Pt/gamma-Al2O3. XPS results revealed that while the presence of surface Sn species that may be responsible of the lowering of carbon deposits on the Pt surface, sulfate formation prevents carbon deposition on the support. Results suggest that pre-sulfated 1%Pt-2%Sn/gamma-AI(2)O(3) catalyst can prevent further contributions to particulate formation over the catalyst and can increase catalyst resistance to deactivation during automotive exhaust control. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1566-7367 UR - ISI:000223629100014 L2 - particulate emissions;SO2;sulfated Pt-Sn catalysts;carbon residues deposition;coke;PT-SN/AL2O3 CATALYSTS; ISOBUTANE DEHYDROGENATION; SULFUR-DIOXIDE; COKE FORMATION; OXIDATION; PLATINUM; DISPERSION; NO SO - Catalysis Communications 2004 ;5(9):547-552 10491 UI - 5567 AU - Cortes D AU - Alvarez J AU - Alvarez J AU - Fradkov A AD - Ctr Invest Cientif & Educ Super Ensenada Mexico, Dept Elect & Telecommun, San Diego, CA 92143, USAIPN, Ctr Invest & Estudios Avanzados, Secc Mecatronica, Mexico City 07000, DF, MexicoRussian Acad Sci, Inst Problems Mech Engn, St Petersburg 199178, RussiaCortes, D, Ctr Invest Cientif & Educ Super Ensenada Mexico, Dept Elect & Telecommun, POB 434944, San Diego, CA 92143 USA TI - Tracking control of the boost converter AB - The tracking control problem of amplifying converters encompasses an important practical concern and a challenging theoretical problem. These converters are nonlinear, nonminimum phase systems with saturated control and a highly variable parameter (the load). Such characteristics make amplifying converters devices difficult to control, even for the regulation case. Several aspects of the tracking control problem of the boost converter are addressed. A characterisation of the signal the converter is able to follow is given. The relationship between the parameter values and the tracking error is established, and it is shown that adequate parameters for the DC-to-DC converter are not always suitable for DC-to-AC conversion MH - USA MH - Mexico|Distrito Federal MH - Russia PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 1350-2379 UR - ISI:000221221700012 L2 - POWER CONVERTERS; ASYMPTOTIC TRACKING; DESIGN SO - Iee Proceedings-Control Theory and Applications 2004 ;151(2):218-224 10492 UI - 5668 AU - Cortes EC AU - de la Fuente JAM AU - Moreno JM AU - Perez CP AU - Cordoncillo EC AU - Castello JBC AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUNAM, Fac Quim, Cd Univ, Mexico City 04510, DF, MexicoUniv Jaume 1, Dept Quim Inorgan & Organ, Castellon 1208, SpainCortes, EC, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Solid-solution formation in the synthesis of Fe-zircon AB - To investigate solid-solution formation in the iron-doped silicate (zircon) system, different samples were prepared by the ceramic method with addition of LiF as a mineralizer. The results of X-ray powder diffraction (XRD), Fe-57 Mossbauer, and UV-visible spectroscopy showed that in the as-prepared samples, only a small fraction of iron, i.e., about 2.5 mol%, is hosted in the zircon structure as paramagnetic Fe 31 species, while the remaining Fe3+ cations form magnetic alpha-Fe2O3 particles that are trapped in the zircon matrix MH - Mexico|Distrito Federal MH - Spain PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7820 UR - ISI:000220981700014 L2 - MECHANISM; SYSTEM SO - Journal of the American Ceramic Society 2004 ;87(4):612-616 10493 UI - 3463 AU - Cortes LM AU - Baltazar LM AU - Lopez-Cardona MG AU - Olivares N AU - Ramos C AU - Salazar M AU - Sandoval L AU - Lorenz MGO AU - Chakraborty R AU - Paterson AD AU - Rivas F AD - Inst Mexicano Seguro Social, Hosp Especialidades, Div Immunol, Guadalajara, Jalisco, MexicoInst Mexicano Seguro Social, Hosp Especialidades, Div Genet, Guadalajara, Jalisco, MexicoInst Mexicano Seguro Social, Hosp Especialidades, Div Mol Med, Guadalajara, Jalisco, MexicoInst Mexicano Seguro Social, Hosp Especialidades, Ctr Invest Biomed Occidente, Guadalajara, Jalisco, MexicoUniv Guadalajara, Grad Studies Program Immunol, Ctr Univ Ciencias Salud, Guadalajara 44430, Jalisco, MexicoUniv Colima, Sch Med, Colima, MexicoUniv Cincinnati, Dept Environm Hlth, Ctr Genome Informat, Cincinnati, OH, USAHosp Sick Children, Program Genet & Genom Biol, Toronto, ON, CanadaUSN, Med Res Ctr, Silver Spring, MD, USACortes, LM, NEI, NIH, Immunoregulat Lab, Bldg 10-10N222,9000 Rockville Pike, Bethesda, MD 20892 USA TI - HLA class II haplotypes in Mexican systemic lupus erythematosus patients AB - Systemic lupus erythematosus (SLE) is an autoimmune disease in which polymorphisms within the human leukocyte antigen (HLA) region have been associated to its etiology. For this study, HLA-DQB1, DQA1, and DRB1 genes were typed by polymerase chain reaction-sequence-specific primer in 237 individuals, taken from 74 families, who had a member with SLE, and who had their residence in the western region of Mexico; as well as in 159 ethnically matched healthy volunteers taken from 32 families. Genotype and allele frequency analysis was performed in 74 SLE patients and 54 unrelated controls. Precise three-loci identification of independent haplotypes was performed in 48 patients and 54 controls by familial segregation. Genotype distribution at each loci was concordant with Hardy-Weinberg's equilibrium in the control group. In general, no genotype effect was observed in SLE patients. Allele distribution comparison showed in the SLE group a significant increase of HLA-DQA1*0102, DQB1*0402, and DRB1*15; whereas alleles HLA-DQB1*0303 and *0501 were significantly decreased. SLE patients showed haplotype DQB1*0602-DQA1-*0102-DRB1*15 increased. As expected, patients with SLE have a reduced haplotype genetic diversity. The associations found in this study are related to an ancestral haplotype that has been observed in SLE populations of different origins. (C) American Society for Histocompatibility and Immunogenetics, 2004. Published by Elsevier Inc MH - Canada MH - USA MH - Mexico|Colima MH - Mexico|Jalisco PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000226245200010 L2 - haplotype;HLA class II;systemic lupus erythernatosus;association study;PRIMERS PCR-SSP; LINKAGE DISEQUILIBRIUM; ETHNIC-GROUPS; ALLELES; SUSCEPTIBILITY; ASSOCIATION; DISEASE; REGION; DNA; AMPLIFICATION SO - Human Immunology 2004 ;65(12):1469-1476 10494 UI - 5358 AU - Cortes LM AU - Baltazar LM AU - Perea J AU - Gallegos-Arreola MP AU - Flores SE AU - Sandoval L AU - Olivares N AU - Lorenz MGO AU - Xu H AU - Barton SA AU - Chakraborty R AU - Rivas F AD - Univ Texas, Sch Publ Hlth, Ctr Human Genet, Houston, TX 77225, USAInst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Guadalajara 44340, Jalisco, MexicoUniv Guadalajara, Ctr Univ Ciencias Salud, Grad Studies Program Immunol, Guadalajara, SpainUniv Colima, Sch Med, Colima, MexicoSecretaria Salud Jalisco, Hosp Reg Occidente, Guadalajara, Jalisco, MexicoUSN, Res Ctr, Lab Appl Gen, Silver Spring, MD 20910, USAUniv Texas, MD Anderson Canc Ctr, Dept Epidemiol, Houston, TX 77030, USAUniv Cincinnati, Dept Environm Hlth, Ctr Genome Informat, Cincinnati, OH, USABarton, SA, Univ Texas, Sch Publ Hlth, Ctr Human Genet, POB 20186, Houston, TX 77225 USA TI - HLA-DQB1,-DQA1, DRB1 linkage disequilibrium and haplotype diversity in a Mestizo population from Guadalajara, Mexico AB - HLA-DQB1, -DQA1, and -DRB1 genes were typed by polymerase chain reaction with sequence-specific primer (PCR-SSP) in 159 healthy volunteers from 32 families living in Guadalajara, Mexico. Three-locus genotype data from all family members were used to infer haplotypes in 54 unrelated individuals of the sample, from which estimate of segregating haplotype frequencies and linkage disequilibrium (LD) between loci were computed. Genotype distributions were concordant with Hardy-Weinberg expectations (HWE) for all three loci, and allele distributions were similar to the ones observed in other Latin-American populations. Of the 56 distinct three-site (DQB1-DQA1-DRB1) haplotypes observed in the sample, the five most common (i.e., with frequencies of five counts or more) were: *0302-*0301-*04, *0201-*0201-*07, *0301-*0501-*14, *0402-*0401-*08, and *0501-*0101-*01. These common three-locus haplotypes also contributed to the majority of the significant two-locus linkage disequilibria. of these three sites MH - Mexico|Colima MH - Mexico|Jalisco MH - Spain MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 2 U4 - Cell Biology;Immunology;Pathology U5 - J;Article AV - English IS - 0001-2815 UR - ISI:000221620300008 L2 - haplotype;HLA class II;HLA-DQA1;HLA-DQB1;HLA-DRB1;linkage disequilibrium;Mexico;SYSTEMIC-LUPUS-ERYTHEMATOSUS; EWENS SAMPLING DISTRIBUTION; PRIMERS PCR-SSP; CLASS-II ALLELE; HLA CLASS-I; FREQUENCY ESTIMATION; MHC GENES; ADMIXTURE; DNA; RECONSTRUCTION SO - Tissue Antigens 2004 ;63(5):458-465 10495 UI - 4154 AU - Cortese L AU - Gavazzi G AU - Boselli A AU - Iglesias-Paramo J AU - Carrasco L AD - Univ Studi Milano Bicocca, I-20126 Milan, ItalyLab Astrophys Marseille, F-13376 Marseille, FranceInst Nact Astrofis Opt & Electron, Puebla 72000, MexicoUNAM, Observ Astron Nacl, Ensenada, Baja California, MexicoCortese, L, Univ Studi Milano Bicocca, Pzza Sci 3, I-20126 Milan, Italy TI - Multiple merging in the Abell cluster 1367 AB - We present a dynamical analysis of the central similar to 1.3 square degrees of the cluster of galaxies Abell 1367, based on 273 redshift measurements (of which 119 are news). From the analysis of the 146 confirmed cluster members we derive a significantly non-Gaussian velocity distribution, with a mean location C-B1 = 6484 +/- 81 km s(-1) and a scale S-B1 = 891 +/- 58 km s-1. The cluster appears elongated from the North-West to the South-East with two main density peaks associated with two substructures. The North-West subcluster is probably in the early phase of merging into the South-East substructure (similar to0.2 Gyr before core crossing). A dynamical study of the two subclouds points out the existence of a group of star-forming galaxies infalling into the core of the South-East subcloud and suggests that two other groups are infalling into the NW and SE subclusters respectively. These three subgroups contain a higher fraction of star-forming galaxies than the cluster core, as expected during merging events. Abell 1367 appears as a young cluster currently forming at the intersection of two filaments MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Puebla PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000224526500009 L2 - galaxies : clusters : individual : A1367;galaxies : evolution;galaxies : distances and redshifts;OPTICAL SPECTROSCOPY; VELOCITY DISPERSIONS; LUMINOSITY FUNCTION; IRREGULAR GALAXIES; RADIO-SOURCES; A1367; SUBSTRUCTURE; SCALE; COMA; REDSHIFTS SO - Astronomy & Astrophysics 2004 ;425(2):429-441 10496 UI - 3796 AU - Cortese P AU - Dellacasa G AU - Ramello L AU - Sitta M AU - Ahmad S AU - Bari W AU - Irfan M AU - Zafar M AU - Belogianni A AU - Christakoglou P AU - Ganoti P AU - Petridis A AU - Roukoutakis F AU - Spyropoulou-Stassinaki M AU - Vassiliou M AU - Caselle M AU - Di Bari D AU - Elia D AU - Fini RA AU - Ghidini B AU - Lenti V AU - Manzari V AU - Nappi R AU - Navach F AU - Pastore C AU - Posa F AU - Santoro R AU - Sgura I AU - Corsi F AU - De Venuto D AU - Fratino U AU - Marzocca C AU - Li X AU - Liu Z AU - Lu S AU - Lu Z AU - Meng Q AU - Sa B AU - Yuan J AU - Zhou J AU - Zhou S AU - Klovning A AU - Nystrand J AU - Pommeresche B AU - Rohrich D AU - Ullaland K AU - Vestbo AS AU - Yin Z AU - Fanebust K AU - Helstrup H AU - Lien JA AU - Choudbury RK AU - Dubey AK AU - Mahapatra DP AU - Mishra D AU - Phatak SC AU - Sahoo R AU - Evans D AU - Jones GT AU - Jovanovic P AU - Jusko A AU - Kinson JB AU - Lietava R AU - Baillie OV AU - Alici A AU - Anselmo F AU - Antonioli P AU - Bari G AU - Basile M AU - Baek YW AU - Bellagamba L AU - Boscherini D AU - Bruni A AU - Bruni G AU - Romero GC AU - Cerron-Zeballos E AU - Cifarelli L AU - Cindolo F AU - Corradi M AU - Falchieri D AU - Gabrielli A AU - Gandolfi E AU - Giusti O AU - Hatzifotiadou D AU - Laurenti G AU - Luvisetto ML AU - Margotti A AU - Masetti M AU - Morozov S AU - Nania R AU - Otiougova P AU - Palmonari F AU - Pesci A AU - Pierrella F AU - Polini A AU - Sartorelli G AU - Scapparone E AU - Scioli G AU - Vacca GP AU - Valenti G AU - Venturi G AU - Williams MCS AU - Zichichi A AU - Cerny V AU - Janik R AU - Kapusta S AU - Lucan L AU - Pikna M AU - Pisut J AU - Pisutova N AU - Sitar B AU - Strmen P AU - Szarka I AU - Zagiba M AU - Aiftimiei C AU - Catanescu V AU - Duma M AU - Legrand CI AU - Moisa D AU - Petrovici M AU - Stoicea G AU - Denes E AU - Eged B AU - Fodor Z AU - Kiss T AU - Palla G AU - Sulyan J AU - Zimanyi J AU - Basciu S AU - Cicalo C AU - De Falco A AU - Floris M AU - ciotta-Serpi MP AU - Puddu G AU - Serci S AU - Siddi E AU - Tocco L AU - Usai G AU - Cleymans J AU - Fearick R AU - Vilakazi Z AU - Badala A AU - Barbera R AU - Lo Re G AU - Palmeri A AU - Pappalardo GS AU - Pulvirenti A AU - Riggi F AU - Andres Y AU - Anelli G AU - Augustin I AU - Augustinus A AU - Baechler J AU - Barberis P AU - Belikov JA AU - Betev L AU - Boccardi A AU - Braem A AU - Bramm R AU - Brun R AU - Burns M AU - Buncic P AU - Cali I AU - Campagnolo R AU - Campbell M AU - Carena F AU - Carena W AU - Carminati F AU - Carrer N AU - Cheshkov C AU - Chochula P AU - Chudoba J AU - Barbosa JCD AU - Davenport M AU - De Cataldo G AU - de Groot J AU - Di Mauro A AU - Dinapoli R AU - Divia R AU - Engster C AU - Evrard S AU - Fabjan C AU - Fasso A AU - Favretto D AU - Feng L AU - Formenti F AU - Futo E AU - Gallas-Torreira A AU - Gheata A AU - Gonzalez-Caballero I AU - Gonzalez-Gutierrez C AU - Gregory C AU - Hoch M AU - Hoedelmoser H AU - Hristov P AU - Ivanov M AU - Jirden L AU - Junique A AU - Klempt W AU - Kluge A AU - Kowalski M AU - Kuhr T AU - Leistam L AU - Lourenco C AU - Marin JC AU - Martinengo P AU - Masoni A AU - Mast M AU - Meyer T AU - Mohanty A AU - Morel M AU - Morsch A AU - Mota B AU - Muller H AU - Musa L AU - Nilsson P AU - Osmic F AU - Perini D AU - Peters A AU - Picard D AU - Piuz F AU - Popescu S AU - Rademakers E AU - Revol JP AU - Riedler P AU - Rosso E AU - Safarik K AU - Saiz P AU - Santiard JC AU - Schossmaier K AU - Schukraft J AU - Schutz Y AU - Schyns E AU - Skowronski P AU - Soos C AU - Stefanini G AU - Stock R AU - Swoboda D AU - Szymanski P AU - Taureg H AU - Tavlet M AU - Tissot-Daguette P AU - Vande Vyvre P AU - Van-Der-Vlugt C AU - Vanuxem JP AU - Vascotto A AU - Aggarwal MM AU - Bhati AK AU - Kumar A AU - Sharma M AU - Sood G AU - Baldit A AU - Barret V AU - Bastid N AU - Blanchard G AD - GSI Darmstadt, D-6100 Darmstadt, GermanyIst Nazl Fis Nucl, I-10125 Turin, ItalyCINVESTAV, Mexico City 14000, DF, MexicoCERN, Geneva, SwitzerlandCortese, P, CERN, Geneva, Switzerland TI - ALICE: Physics performance report, volume I AB - ALICE is a general-purpose heavy-ion experiment designed to study the physics of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions at the LHC. It currently includes more than 900 physicists and senior engineers, from both nuclear and high-energy physics, from about 80 institutions in 28 countries. The experiment was approved in February 1997. The detailed design of the different detector systems has been laid down in a number of Technical Design Reports issued between mid-1998 and the end of 2001 and construction has started for most detectors. Since the last comprehensive information on detector and physics performance was published in the ALICE Technical Proposal in 1996, the detector as well as simulation, reconstruction and analysis software have undergone significant development. The Physics Performance Report (PPR) will give an updated and comprehensive summary of the current status and performance of the various ALICE subsystems, including updates to the Technical Design Reports, where appropriate, as well as a description of systems which have not been published in a Technical Design Report. The PPR will be published in two volumes. The current Volume I contains: 1. a short theoretical overview and an extensive reference list concerning the physics topics of interest to ALICE, 2. relevant experimental conditions at the LHC, 3. a short summary and update of the subsystem designs, and 4. a description of the offline framework and Monte Carlo generators. Volume II, which will be published separately, will contain detailed simulations of combined detector performance, event reconstruction, and analysis of a representative sample of relevant physics observables from global event characteristics to hard processes. (Some figures in this article are in colour only in the electronic version.) MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Switzerland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Review AV - English IS - 0954-3899 UR - ISI:000225279200002 L2 - HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; BOSE-EINSTEIN CORRELATIONS; NUCLEUS-NUCLEUS COLLISIONS; RADIATIVE ENERGY-LOSS; PROMPT-PHOTON PRODUCTION; HOT GAUGE-THEORIES; STRING FUSION MODEL; TOTAL CROSS-SECTION; PLUS PB COLLISIONS SO - Journal of Physics G-Nuclear and Particle Physics 2004 ;30(11):1517-1763 10497 UI - 5155 AU - costa-Elias J AU - Navarro-Moldes L AD - Univ Autonoma San Luis Potosi, San Luis Potosi 78000, MexicoUniv Politecn Catalunya, Barcelona, SpainAcosta-Elias, J, Univ Autonoma San Luis Potosi, Av Salvador Nava SN,Zona Univ, San Luis Potosi 78000, Mexico TI - Performance evaluation of the fast consistency algorithms in large decentralized systems AB - Weak consistency algorithms allow us to propagate changes in a large, arbitrary changing storage network in a self-organizing way. These algorithms generate very little traffic overhead. In this paper we evaluate our own weak consistency algorithm, which is called the "Fast Consistency Algorithm", and whose main aim is optimizing the propagation of changes introducing a preference for nodes and zones of the network which have greatest demand. We conclude that considering application parameters such as demand in the event or change propagation mechanism to: 1) prioritize probabilistic interactions with neighbors with higher demand, and 2) including little changes on the logical topology, gives a surprising improvement in the speed of change propagation perceived by most users MH - Mexico|San Luis Potosi MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000222043200103 SO - Computational Science - Iccs 2004, Pt 1, Proceedings 2004 ;3036():615-618 10498 UI - 5284 AU - costa-Elias J AU - Pineda U AU - Luna-Rivera JM AU - Stevens-Navarro E AU - Campos-Canton I AU - Navarro-Moldes L AD - Univ Autonoma San Luis Potosi, Fac Ciencias, Sal Luis Potosi 78290, Mexico. Univ Politecn Catalunya, Barcelona, Spain TI - The effects of network topology on epidemic algorithms AB - Epidemic algorithms can propagate information in a large scale network, that changes arbitrarily, in a self-organizing way. This type of spreading process allows rapid dissemination of information to all network nodes. However, the dynamics of epidemic algorithms can be strongly influenced by the network topology. In this paper, numerical simulations are used to illustrate such influences. We address networks with simple topologies for simplicity and in order to isolate other effects that occur in more complex networks MH - Mexico|San Luis Potosi MH - Spain T3 - COMPUTATIONAL SCIENCE AND ITS APPLICATIONS - ICCSA 2004Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlejacosta@galia.fc.uaslp.mx u-pineda@galia.fc.uaslp.mx mlr@galia.fc.uaslp.mx icampos@galia.fc.uaslp.mx leandro@ac.upc.es1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAE52 AV - English IS - 0302-9743 UR - ISI:000221854800019 SO - 2004 ;():177-184 10499 UI - 3270 AU - costa-Mesa HG AU - Cruz-Ramirez N AU - Frisby J AU - Zheng Y AU - Buckley D AU - Morris J AU - Mayhew J AD - Univ Veracruzana, Dept Artificial Intelligence, Fac Phys & Artificial Intelligence, Xalapa 91000, Veracruz, Mexico. Univ Sheffield, Dept Psychol, Artificial Intelligence Vis Res Unit, Sheffield S10 2TP, S Yorkshire, England. Univ Sheffield, Royal Hallamshire Hosp, Sect Acad Radiol, Sheffield S10 2JF, S Yorkshire, England TI - Digital image processing of functional magnetic resonance images to identify stereo-sensitive cortical regions using dynamic global stimuli AB - Functional magnetic resonance images (fMRI) were analyzed to investigate the cortical regions involved in stereoscopic vision using red/green anaglyphs to present random dot stereograms. Two experiments were conducted both of which required high attentional demands. In the first experiment the subjects were instructed to follow the path of a square defined by depth and moving in the horizontal plane contrasted with a similar sized square defined by a slight difference in luminance. Three main regions were identified V3A, V3B and BA7. To test that the observed activations were not produced by the pursuit eye movements, a second experiment required the subjects to fixate whilst a shape was presented in different random orientations. Our results suggests that areas V1, V3A and precuneus are involved in stereo disparity processing. We hypothesise that the activation of the V3B region was produced by the second order motion component induced by the spatio-temporal changes in disparity MH - United Kingdom MH - Mexico|Veracruz T3 - ADVANCES IN ARTIFICIAL INTELLIGENCE - IBERAMIA 2004Lecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleheacosta@uv.mx ncruz@uv.mx j.p.frisby@sheffield.ac.uk ying.zheng@sheffield.ac.uk d.buckle@sheffield.ac.uk janet.morris@sheffield.ac.uk j.e.mayhew@sheffield.ac.uk0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBO40 AV - English IS - 0302-9743 UR - ISI:000226646200057 SO - 2004 ;():572-581 10500 UI - 4478 AU - Costa JL AU - Romero EM AU - Lindblad P AD - Uppsala Univ, Dept Physiol Bot, Evolut Biol Ctr, SE-75236 Uppsala, SwedenUNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca, Morelos, MexicoCosta, JL, Uppsala Univ, Dept Physiol Bot, Evolut Biol Ctr, Villavagen 6, SE-75236 Uppsala, Sweden TI - Sequence based data supports a single Nostoc strain in individual coralloid roots of cycads AB - The genetic diversity of cyanobacteria associated with cycads was examined using the tRNA(Leu) (UAA) intron as a genetic marker. Coralloid roots of both natural populations of the cycad Macrozamia riedlei (Fischer ex Gaudichaud-Beaupre) C.A. Gardner growing in Perth, Australia and cycads growing in greenhouses, also in Perth, were used and their respective cyanobionts analyzed. Several Nostoc strains were found to be involved in this symbiosis, both in natural populations and greenhouse-originated cycads. However, only one strain was present in individual coralloid roots and in individual plants, even when analyzing different coralloid roots from the same plant. Moreover, when examining plants growing close to each other (female plants and their respective offspring) the same cyanobacterium was consistently present in the different coralloid roots. Whether this reflects a selective mechanisms or merely the availability of Nostoc strains remains to be ascertained. The high cyanobacterial diversity in coralloid roots of cycads revealed by PCR fingerprinting is, therefore, contested. In this study, the potential problems of using different methods (e.g., PCR fingerprinting) to study the genetic diversity of symbiotic cyanobacteria, is also addressed. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 0168-6496 UR - ISI:000223695000013 L2 - Nostoc;cycad;symbiosis;tRNA(Leu) intron;genetic;diversity;GENETIC DIVERSITY; CYANOBACTERIAL DIVERSITY; CONTAINING LICHENS; SPECIFICITY; SYMBIONTS; PATTERNS; MARKER; INTRON; HIP1; DNA SO - Fems Microbiology Ecology 2004 ;49(3):481-487 10501 UI - 4999 AU - Costa JT AU - Fitzgerald TD AU - Pescador-Rubio A AU - Mays J AU - Janzen DH AD - Western Carolina Univ, Dept Biol, Cullowhee, NC 28723, USASUNY Coll Cortland, Dept Biol Sci, Cortland, NY 13045, USAUniv Colima, Ctr Univ Invest & Desarrollo Agropecuario, Colima, MexicoUniv Penn, Dept Biol, Philadelphia, PA 19104, USACosta, JT, Western Carolina Univ, Dept Biol, Cullowhee, NC 28723, USA TI - Social behavior of larvae of the Neotropical processionary weevil Phelypera distigma (Boheman) (Coleoptera : Curculionidae : Hyperinae) AB - Socially gregarious behavior among free-living leaf-eating insect larvae occurs mostly among Lepidoptera, Symphyta, and a few Chyrsomelidae (Coleoptera). However, the Neotropical hyperine curculionid Phelypera distigma has also evolved this lifestyle, exhibiting a suite of social behaviors unique among beetles. The larvae are nomadic processionary foragers that punctuate foraging bouts with rosette-shaped resting formations (cycloalexy). Larvae also vibrate or bob their heads rapidly when moving, especially when in contact with conspecifics, and this suggests acoustic or vibrational communication. In this study we used observational and experimental approaches to investigate the basis of processionary, cycloalexic,and head-vibration behavior of this species. Larvae used both trail pheromones and thigmotactic signals to organize themselves into head-to-tail processionary columns. The trail pheromone, produced from the center of the abdomen, remains active for up to 4 h. Processions are not consistently led by particular individuals, but dynamically change over time and often temporarily break into two or more subprocessions. Subprocessions reunite through use of the trail pheromone. We found no evidence that head-bobbing generates attraction through substrate-borne or acoustic signals, but this behavior functions in direct contact to excite group activity. Time-lapse videography used to analyze cycloalexic group formation showed that larvae transition from feeding in a line along the leaf margin to cycloalexic formations on the upper leaf surface via a coordinated back-up movement that brings the posterior tip of their abdomens into contact. We identify three phases of cycloalexic formation: line-up, back-up, and an adjustment phase. Complete assembly can be achieved in as little as 5 s, but often the two phases establishing the basic rosette lasts 5-10 min, while the adjustment phase slowly tightens the group over a period of up to an hour. Collectively these studies present the first documented case of chemical trail marking in a beetle, and provide insight into a remarkable social-behavioral repertoire convergent in key respects with the better-studied social caterpillars and sawflies MH - Mexico|Colima MH - USA PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0179-1613 UR - ISI:000222483900002 L2 - LECONTEI FITCH HYMENOPTERA; WILLOW LEAF BEETLE; PLAGIODERA-VERSICOLORA; TRAIL PHEROMONE; COMMUNICATION; CATERPILLARS; CHRYSOMELIDAE; DIPRIONIDAE; LEPIDOPTERA; SYMPHYTA SO - Ethology 2004 ;110(7):515-530 10502 UI - 3672 AU - Cota-Sanchez G AU - Soucy G AU - Huczko A AU - Beauvais J AU - Drouin D AD - Univ Sherbrooke, Dept Chem Engn, Sherbrooke, PQ J1K 2R1, CanadaInst Nacl Invest Nucl, Salazar, Edo Mex, MexicoWarsaw Univ, Dept Chem, PL-02093 Warsaw, PolandUniv Sherbrooke, Dept Elect & Comp Engn, Sherbrooke, PQ J1K 2R1, CanadaSoucy, G, Univ Sherbrooke, Dept Chem Engn, Blvd Univ, Sherbrooke, PQ J1K 2R1, Canada TI - Effect of iron catalyst on the synthesis of fullerenes and carbon nanotubes in induction plasma AB - The continuous synthesis of fullerenes and carbon nanotubes (CNTs) in induction plasmas at the 40-kW plate power level has been studied. Kinetics calculations were conducted to predict the conditions for fullerenes formation at the high plasma temperatures. "Carbon black-iron" powder mixtures were used as starting materials. The effects of the carbon-iron molar ratio and the reactant's feeding rates on the yield of fullerenes and CNTs were studied. The experimental results show that the synthesis of fullerenes and CNTs is clearly enhanced by the 4 mol % of Fe, present in the starting mixture, when it is fed at the low rate of about 1 g/min. Under these conditions, high yields of CNTs and C-60 content, equal to 7.4 wt % of the total reaction product collected, were obtained MH - Canada MH - Mexico|Estado De Mexico MH - Poland PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000225695100023 L2 - THERMAL PLASMA; DECOMPOSITION; PRESSURE SO - Journal of Physical Chemistry B 2004 ;108(50):19210-19217 10503 UI - 5872 AU - Covian-Nares F AU - Martinez-Cadena G AU - Lopez-Godinez J AU - Voronina E AU - Wessel GM AU - Garcia-Soto J AD - Univ Guanajuato, Fac Quim, Inst Invest Biol Expt, Guanajuato 3600, Gto, MexicoBrown Univ, Dept Mol & Cell Biol & Biochem, Providence, RI 02912, USAGarcia-Soto, J, Univ Guanajuato, Fac Quim, Inst Invest Biol Expt, Col Noria Alta,AP 187, Guanajuato 3600, Gto, Mexico TI - A Rho-signaling pathway mediates cortical granule translocation in the sea urchin oocyte AB - Cortical granules are secretory vesicles of the egg that play a fundamental role in preventing polyspermy at fertilization. In the sea urchin egg, they localize directly beneath the plasma membrane forming a compact monolayer and, upon fertilization, undergo a Ca2+-dependent exocytosis. Cortical granules form during early oogenesis and, during maturation, translocate from the cytosol to the oocyte cortex in a inicrofilament-mediated process. We tested the hypothesis that these cortical granule dynamics were regulated by Rho, a GTPase of the Ras superfamily. We observed that Rho is synthesized early in oogenesis, mainly in a soluble form. At the end of maturation, however, Rho associates with cortical granules. Inhibition of Rho with the C3 transferase from C. bottilinum blocks cortical granule translocation and microfilaments undergo a significant disorganization. A similar effect is observed by GGTI-286, a geranylgeranyl transferase inhibitor, suggesting that the association of Rho with the cortical granules is indispensable for its function. In contrast, the anchorage of the cortical granules in the cortex, as well as their fusion at fertilization, are Rho-independent processes. We conclude that Rho association with the cortical granules is a critical regulatory step in their translocation to the egg cortex. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Developmental Biology U5 - J;Article AV - English IS - 0925-4773 UR - ISI:000220391900002 L2 - small G protein;Rho;cortical granule;actin;microfilaments;oocyte maturation;fertilization;GTP-BINDING PROTEIN; ACTIN CYTOSKELETON; REGULATORY PROTEIN; MOUSE EGGS; MATURATION; EXOCYTOSIS; DISSOCIATION; TRAFFICKING; TRANSPORT; GTPASES SO - Mechanisms of Development 2004 ;121(3):225-235 10504 UI - 6445 AU - Crespo-Otero R AU - Montero LA AU - Rosquete G AU - Paron-Garcia JA AU - Gonzalez-Jonte RH AD - Univ La Habana, Fac Quim, Lab Quim Computac & Teor, Bangkok 10400, ThailandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Autonoma Madrid, Dept Quim Fis Aplicada, E-28049 Madrid, SpainMontero, LA, Univ La Habana, Fac Quim, Lab Quim Computac & Teor, Bangkok 10400, Thailand TI - Theoretical model of internal rotation in monosubstituted derivatives of furfural AB - The present work explores the effect of substitution in all free positions of furfural on conformational preferences of formyl group by using ab-initio calculations at the MP2/6-31G(p,d) level of theory. Theoretical modeling was made in vacuo. The selected substituents were -CH3, NH2, NO2 and F groups in 3, 4, 5 and ipso carbonyl positions. Geometries of all derivatives were analyzed and it is ascertained that substitution has not important consequences on furan ring geometry. Differences of energy between OO-cis and trans conformers and energy barriers between them are described and extreme cases are explained. Interesting features appear in the cases of -NH2 and -NO2 groups, and particularly when the 3 and ipso carbonyl positions are substituted. Variations in energy barriers are correlated with variations in C2-C6 distances for the transition states and planar forms. Substitution effect on Mulliken charges are analyzed and related with internal rotation energy barriers and differences between conformers. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Spain MH - Thailand PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000188245900012 L2 - substituent effect;furfural;ab initio;molecular orbitals;internal rotation barriers;conformational equilibrium;NUCLEAR MAGNETIC-RESONANCE; MOLECULAR-ORBITAL METHODS; SMOLDERING COMBUSTION; ELECTRON-DIFFRACTION; FURAN; NMR; BARRIERS; SPECTRA; QUANTIFICATION; CONFORMATIONS SO - Journal of Computational Chemistry 2004 ;25(3):429-438 10505 UI - 5383 AU - Cristobal-Azkarate J AU - Dias PAD AU - Vea JJ AD - Univ Barcelona, Ctr Especial Recerca Primats, Barcelona 08035, SpainUniv Autonoma Madrid, Dept Psicol Biol & Salud, E-28049 Madrid, SpainCristobal-Azkarate, J, Apartado Postal 88,CP 95870, Catemaco, Veracruz, Mexico TI - Causes of intraspecific aggression in Alouatta palliata mexicana: Evidence from injuries, demography, and habitat AB - Although howlers have been traditionally considered to be pacific, showing one of the lowest rates of aggression among primates, new evidence is emerging to question this image. We present data on injuries in Mexican mantled howlers ( Alouatta palliata mexicana) in relation to different sociecological parameters. We censused howler populations in 19 forest fragments over a 17-mo period in the Los Tuxtlas Region, southern Veracruz, Mexico. We conducted detailed observations of scars, torn lips, broken fingers, mutilated tails and other visible injuries. We also collected data on the demography, biogeography and vegetation of each fragment in order to relate injury data to them. We censused 333 howlers, of which we exhaustively observed 254 for injuries. Four resident adult females (n = 108) and 29 adult resident males (n = 76) had injuries, while none of the solitary males ( n = 16), solitary females ( n = 1), juveniles ( n = 23) and infants ( n = 30) had them. We discuss possible interpretative scenarios for the distribution of injuries. Although some results suggest that food resource concentration may determine intergroup agonistic encounters, we propose that physical injury is primarily associated with male-male agonistic encounters during takeovers, and consequently it could indicate migration among troops MH - Mexico|Veracruz MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0164-0291 UR - ISI:000221665900011 L2 - Alouatta palliata;Los Tuxtlas;Veracruz;Mexico;physical injuries;aggressive behavior;MANTLED HOWLING MONKEYS; HOWLER MONKEY; LOS-TUXTLAS; RAIN-FOREST; COSTA-RICA; POPULATION; PATTERNS; DISAPPEARANCE; BEHAVIOR SO - International Journal of Primatology 2004 ;25(4):939-953 10506 UI - 4324 AU - Crossa J AU - Yang RC AU - Cornelius PL AD - CIMMYT, Biomet & Stat Unit, Mexico City 06600, DF, MexicoAlberta Agr Food & Rural Dev, Edmonton, AB T6H 5T6, CanadaUniv Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, CanadaUniv Kentucky, Dept Agron, Lexington, KY 40546, USAUniv Kentucky, Dept Stat, Lexington, KY 40546, USACrossa, J, CIMMYT, Biomet & Stat Unit, Lisboa 27,Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Studying crossover genotype x environment interaction using linear-bilinear models and mixed models AB - In agriculture and plant breeding the most important genotype x environment interaction pattern is crossover genotype x environment interaction. Procedures using linear-bilinear models are used to find disjoint subsets of sites or genotypes with negligible crossover genotype x environment interaction. In terms of correlations, these subsets of sites or genotypes should be such that pairs of sites have nearly perfect positive genetic correlations. Perfect positive genetic correlation between sites is a sufficient, but not a necessary, condition for a non-COI pattern. The main objective of this study was to use the mixed model theory to confirm that the subsets of sites and genotypes formed by using the linear-bilinear models have negligible crossover genotype x environment interaction. If there is no significant crossover interaction in a subset of sites or genotypes, then the mixed model should be able to confirm this by nonrejection of the hypothesis that the covariance structure has perfect genetic correlation. Mixed model analysis of results from two multisite cultivar trials confirmed the validity of the procedures using linear-bilinear model methods for clustering sites and genotypes into noncrossover genotype x environment interaction subsets MH - Canada MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER STATISTICAL ASSOC & INTERNATIONAL BIOMETRIC SOC RP - NOT IN FILE U3 - TC 9 U4 - Biology;Mathematical & Computational Biology;Statistics & Probability U5 - J;Article AV - English IS - 1085-7117 UR - ISI:000224036400007 L2 - biadditive models;genetic correlations;shifted multiplicative model;sites regression model;variance-covariance matrix;SHIFTED MULTIPLICATIVE MODEL; CULTIVAR TRIALS; RANK-CHANGE; GROUPING ENVIRONMENTS; 2-WAY TABLES SO - Journal of Agricultural Biological and Environmental Statistics 2004 ;9(3):362-380 10507 UI - 4479 AU - Crossa J AU - Franco J AD - Int Maize & Wheat Improvement Ctr CIMMYT, Biometr & Stat Unit, Mexico City 06600, DF, MexicoUniv Republ Oriental Uruguay, Fac Agron, Montevideo, UruguayCrossa, J, Int Maize & Wheat Improvement Ctr CIMMYT, Biometr & Stat Unit, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Statistical methods for classifying genotypes AB - In genetic resource conservation and plant breeding, multivariate data on continuous and categorical traits are collected with the objective of selecting genotypes and accessions that best represent the entire population or gene collection with the minimum loss of genetic diversity. Therefore, the best numerical classification strategy is the one that produces the most compact and well-separated groups, that is, minimum variability within each group and maximum variability among groups. In this study, we review geometric classification techniques as well as statistical models based on mixed distribution models. The two-stage sequential clustering strategy uses all variables, continuous and categorical, and it tends to form more homogeneous groups of individuals than other clustering strategies. The sequential clustering strategy can be applied to three-way data comprising genotypes x environments x attributes. This approach groups genotypes with consistent responses for most of the continuous and categorical traits across environments MH - Mexico|Distrito Federal MH - Uruguay PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000223738600003 L2 - categorical and continuous variables;cluster analysis;genetic resources;mixture models;MODIFIED LOCATION MODEL; CONTINUOUS-VARIABLES; GENETIC-RESOURCES; CLUSTER-ANALYSIS; NORMAL-DISTRIBUTIONS; MAIZE ACCESSIONS; MIXTURE; CLASSIFICATION; COMPONENTS; LIKELIHOOD SO - Euphytica 2004 ;137(1):19-37 10508 UI - 4626 AU - Croton DJ AU - Gaztanaga E AU - Baugh CM AU - Norberg P AU - Colless M AU - Baldry IK AU - Bland-Hawthorn J AU - Bridges T AU - Cannon R AU - Cole S AU - Collins C AU - Couch W AU - Dalton G AU - De Propris R AU - Driver SP AU - Efstathiou G AU - Ellis RS AU - Frenk CS AU - Glazebrook K AU - Jackson C AU - Lahav O AU - Lewis I AU - Lumsden S AU - Maddox S AU - Madgwick D AU - Peacock JA AU - Peterson BA AU - Sutherland W AU - Taylor K AD - Max Planck Inst Astrophys, D-85740 Garching, GermanyINAOE, Puebla 7200, MexicoCSIC, ICE, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, SpainUniv Durham, Dept Phys, Durham DH1 3LE, EnglandETH Honggerberg, ETHZ Inst Astron, CH-8093 Zurich, SwitzerlandAustralian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaJohns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21118, USAAnglo Australian Observ, Epping, NSW 2111, AustraliaQueens Univ, Dept Phys, Kingston, ON K7L 3N6, CanadaLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead L14 1LD, Merseyside, EnglandUniv New S Wales, Dept Astrophys, Sydney, NSW 2052, AustraliaUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandRutherford Appleton Lab, Space Sci & Technol Div, Didcot OX11 0QX, Oxon, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandCALTECH, Dept Astron, Pasadena, CA 91025, USACSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaUniv Coll London, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Leeds, Dept Phys, Leeds LS2 9JT, W Yorkshire, EnglandUniv Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, EnglandUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandCroton, DJ, Max Planck Inst Astrophys, D-85740 Garching, Germany TI - The 2dF Galaxy Redshift Survey: higher-order galaxy correlation functions AB - We measure moments of the galaxy count probability distribution function in the Two-degree Field Galaxy Redshift Survey (2dFGRS). The survey is divided into volume-limited subsamples in order to examine the dependence of the higher-order clustering on galaxy luminosity. We demonstrate the hierarchical scaling of the averaged p-point galaxy correlation functions, (ξ) over bar (p), up top = 6. The hierarchical amplitudes, S-p = (ξ) over bar (p)/(ξ) over bar (p-1)(2), are approximately independent of the cell radius used to smooth the galaxy distribution on small to medium scales. On larger scales we find that the higher-order moments can be strongly affected by the presence of rare, massive superstructures in the galaxy distribution. The skewness S-3 has a weak dependence on luminosity, approximated by a linear dependence on log luminosity. We discuss the implications of our results for simple models of linear and non-linear bias that relate the galaxy distribution to the underlying mass MH - Australia MH - Canada MH - United Kingdom MH - Germany MH - Mexico|Puebla MH - Spain MH - Switzerland MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 28 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000223290600014 L2 - galaxies : statistics;cosmology : theory;large-scale structure of Universe;DIGITAL SKY SURVEY; COSMOLOGICAL PERTURBATION-THEORY; GAUSSIAN INITIAL CONDITIONS; BACKGROUND POWER SPECTRUM; SPHERICAL COLLAPSE MODEL; PROBE WMAP OBSERVATIONS; LARGE-SCALE STRUCTURE; LUMINOSITY DEPENDENCE; MATTER DENSITY; APM SO - Monthly Notices of the Royal Astronomical Society 2004 ;352(4):1232-1244 10509 UI - 4804 AU - Croton DJ AU - Colless M AU - Gaztanaga E AU - Baugh CM AU - Norberg P AU - Baldry IK AU - Bland-Hawthorn J AU - Bridges T AU - Cannon R AU - Cole S AU - Collins C AU - Couch W AU - Dalton G AU - De Propris R AU - Driver SP AU - Efstathiou G AU - Ellis RS AU - Frenk CS AU - Glazebrook K AU - Jackson C AU - Lahav O AU - Lewis I AU - Lumsden S AU - Maddox S AU - Madgwick D AU - Peacock JA AU - Peterson BA AU - Sutherland W AU - Taylor K AD - Max Planck Inst Astrophys, D-85740 Garching, GermanyAustralian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaAnglo Australian Observ, Epping, NSW 2111, AustraliaINAOE, Puebla 7200, MexicoCSIC, ICE, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, SpainUniv Durham, Dept Phys, Durham DH1 3LE, EnglandETH Honggerberg, ETHZ Inst Astron, CH-8093 Zurich, SwitzerlandJohns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21118, USAQueens Univ, Dept Phys, Kingston, ON K7L 3N6, CanadaLiverpool John Moores Univ, Astrophys Res Inst, Birkenhead L14 1LD, Merseyside, EnglandUniv New S Wales, Dept Astrophys, Sydney, NSW 2052, AustraliaUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandRutherford Appleton Lab, Space Sci & Technol Div, Didcot OX11 0QX, Oxon, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandCALTECH, Dept Astron, Pasadena, CA 91025, USACSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaUniv London Univ Coll, Dept Phys & Astron, London WC1E 6BT, EnglandUniv Leeds, Dept Phys, Leeds LS2 9JT, W Yorkshire, EnglandUniv Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, EnglandUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USAUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandCroton, DJ, Max Planck Inst Astrophys, D-85740 Garching, Germany TI - The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models AB - We measure the redshift-space reduced void probability function (VPF) for 2dFGRS volume-limited galaxy samples covering the absolute magnitude range M-bJ -5 log(10) h = -18 to -22. Theoretically, the VPF connects the distribution of voids to the moments of galaxy clustering of all orders, and can be used to discriminate clustering models in the weakly nonlinear regime. The reduced VPF measured from the 2dFGRS is in excellent agreement with the paradigm of hierarchical scaling of the galaxy clustering moments. The accuracy of our measurement is such that we can rule out, at a very high significance, popular models for galaxy clustering, including the lognormal distribution. We demonstrate that the negative binomial model gives a very good approximation to the 2dFGRS data over a wide range of scales, out to at least 20 h(-1) Mpc. Conversely, the reduced VPF for dark matter in Lambda cold dark matter (LambdaCDM) universe does appear to be lognormal on small scales but deviates significantly beyond similar to4 h(-1) Mpc. We find little dependence of the 2dFGRS reduced VPF on galaxy luminosity. Our results hold independently in both the North and South Galactic Pole survey regions MH - Australia MH - Canada MH - United Kingdom MH - Germany MH - Mexico|Puebla MH - Spain MH - Switzerland MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000223032000013 L2 - galaxies : statistics;cosmology : theory;large-scale structure of Universe;POINT CORRELATION-FUNCTIONS; STATISTICS; LUMINOSITY; COUNTS; DISTRIBUTIONS; PROBABILITIES; FLUCTUATIONS; CONSTRAINTS; EVOLUTION; CLUSTERS SO - Monthly Notices of the Royal Astronomical Society 2004 ;352(3):828-836 10510 UI - 4603 AU - Cruz-Atienza VM AU - Virieux J AD - IRD, UPMC, UNSA, CNRS,Geosci Azur, Sophia Antipolis, FranceCruz-Atienza, VM, CONACyT, Mexico City, DF, Mexico TI - Dynamic rupture simulation of non-planar faults with a finite-difference approach AB - Two-dimensional (2-D) modelling of dynamic seismic rupture is performed using a recent staggered-grid finite-difference formulation. Rupture boundary conditions are applied only inside the crack, without assuming any symmetry with respect to the rupture surface. By a simple rotation of the stress tensor, the local orientation of the crack is taken into consideration at each stress point. The grid size is controlled by the source discretization. The greater the number of grid nodes discretizing the finite source, the lower the grid size could be. Below the lower bound value associated with a given discretization, numerical artefacts are not negligible with respect to the spatial frequency content of the dynamic solution. Solutions converge for both point and finite sources by densifying the number of stress points in the source. Numerical scaling of boundary conditions is an important element of this convergence and allows the removal of high-frequency spurious effects of dynamic rupture conditions. For the self-similar crack, a comparison with Kostrov's analytical solution shows that accurate stress singularities are obtained for various crack orientations with respect to the numerical grid. For spontaneous rupture modelling assuming a slip-weakening constitutive law, similar solutions are found for both rupture kinematics and excited wavefield in planar faults with any orientation. Finally, based on these results, rupture propagation over an arbitrary non-planar fault is justified and then performed in the presence of heterogeneous medium MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000223470400013 L2 - boundary conditions;dynamic rupture;finite-difference modelling;non-planar faults;seismic rupture;seismic source modelling;PERFECTLY MATCHED LAYER; HETEROGENEOUS MEDIA; WAVE PROPAGATION; FRICTION LAWS; VELOCITY; INSTABILITY; EARTHQUAKE; CRACK; MODEL; TIP SO - Geophysical Journal International 2004 ;158(3):939-954 10511 UI - 3785 AU - Cruz-Gandarilla F AU - Baudin T AU - Penelle R AU - Mendoza-Leon H AD - Inst Politecn Nacl, ESFM, Dept Ciencia Mat, Unidad Prof ALM, Mexico City 07338, DF, MexicoUniv Paris 11, CNRS, UMR 8648, ICMMO,Lab Physicochim Etat Solide, F-91405 Orsay, FranceCruz-Gandarilla, F, Inst Politecn Nacl, ESFM, Dept Ciencia Mat, Unidad Prof ALM, Edif 9, Mexico City 07338, DF, Mexico TI - Study of local microstructure and texture heterogeneities in hot rolled CGO Fe-3%Si sheets AB - After secondary recrystallization, the Fe-3%Si alloys, grade Conventional Grain Oriented (C.G.O.), exhibit a Goss texture that is sought for minimizing watt losses in transformer cores. The mechanisms of Goss grain formation and their evolution during the processing route from hot rolling to decarburizing such as the early first steps of abnormal growth are not still well cleared up. This work deals with the influence of local microstructure and texture heterogeneities observed by X-ray diffraction (XRD) and Electron Back Scattered Diffraction (EBSD) at the hot rolling step. The present results complete those previously obtained by neutron diffraction [1]. Presence of Goss grain colonies at about the quarter of the hot rolled sheet is probably, as it has already been suggested, at the origin of the Goss grain presence at the primary recrystallized state MH - France MH - Mexico|Distrito Federal PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000225119800019 L2 - texture;EBSD;OIM;Fe-Si;Goss texture;hot-rolling;STEEL SO - Recrystallization and Grain Growth, Pts 1 and 2 2004 ;467-470():123-128 10512 UI - 5184 AU - Cruz-Medina IR AU - Hettmansperger TP AU - Thomas H AD - Penn State Univ, Dept Stat, Eberly Coll Sci, University Pk, PA 16802, USAInst Tecnol Sonora, Obregon, Sonora, MexicoHettmansperger, TP, Penn State Univ, Dept Stat, Eberly Coll Sci, 326 Thomas Bldg, University Pk, PA 16802 USA TI - Semiparametric mixture models and repeated measures: the multinomial cut point model AB - Suppose that we have m repeated measures on each subject, and we model the observation vectors with a finite mixture model. We further assume that the repeated measures are conditionally independent. We present methods to estimate the shape of the component distributions along with various features of the component distributions such as the medians, means and variances. We make no distributional assumptions on the components; indeed, we allow different shapes for different components MH - Mexico|Sonora MH - USA PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 1 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0035-9254 UR - ISI:000221978400004 L2 - EM algorithm;finite mixtures;multinomial likelihood;nonparametric estimation;DISTRIBUTIONS; SPEED SO - Journal of the Royal Statistical Society Series C-Applied Statistics 2004 ;53():463-474 10513 UI - 4122 AU - Cruz-Pacheco G AU - Levermore CD AU - Luce BP AD - Univ Nacl Autonoma Mexico, IIMAS, FENOMEC, Mexico City 04510, DF, MexicoUniv Maryland, Dept Math, College Pk, MD 20742, USALos Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545, USALos Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545, USACruz-Pacheco, G, Univ Nacl Autonoma Mexico, IIMAS, FENOMEC, A Postal 20-726, Mexico City 04510, DF, Mexico TI - Complex Ginzburg-Landau equations as perturbations of nonlinear Schrodinger equations a Melnikov approach AB - We study the persistence of quasiperiodic and homoclinic solutions of generalized nonlinear Schrodinger equations under Ginzburg-Landau perturbations. In this paper, the first of a series, Melnikov criteria for the persistence of quasiperiodic and homoclinic solutions are derived directly from the governing partial differential equations via an averaging technique. For families of tori of quasiperiodic solutions, such as rotating waves and traveling waves, that arise within critical sets of linear combinations of conserved functionals, we find that usually only isolated tori will satisfy these selection criteria. Moreover, in some simple cases these criteria are sufficient to conclude that a torus persists. We also demonstrate the nonpersistence of solutions that are homoclinic to rotating waves under a broad class of Ginzburg-Landau perturbations which satisfy a convexity condition. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000224441300005 L2 - quasiperiodic;homoclinic;Melnikov criteria;CHAOS; DYNAMICS; WAVES SO - Physica D-Nonlinear Phenomena 2004 ;197(3-4):269-285 10514 UI - 4014 AU - Cruz-Perez FA AU - Vazquez-Avila JL AU - Ortigoza-Guerrero L AD - CINVESTAV, IPN, Commun Sect, Mexico City 07360, DF, MexicoWFI, San Diego, CA 92121, USACruz-Perez, FA, CINVESTAV, IPN, Commun Sect, Mexico City 07360, DF, Mexico TI - Recurrent formulas for the multiple fractional channel reservation strategy in multi-service mobile cellular networks AB - In this letter, one-dimensional recursive formulas to calculate the blocking probabilities of the different call types in multi-service mobile cellular networks using the multiple fractional channel reservation (MFCR) strategy are derived. MFCR achieves practically the same performance as the optimum call admission control policy in multi-service mobile cellular networks. The "macro states" technique is used to effectively collapse the multidimensional system state representation to a one-dimensional "macro-state" sufficient to analyze all quantities of interest in this letter. Using the macro-state technique reduces the computation of the optimal numbers of reserved channels in MFCR MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Telecommunications U5 - J;Article AV - English IS - 1089-7798 UR - ISI:000224690000009 L2 - admission control;macro-states technique;multiservice;queueing theory;recursive formulas;WIRELESS NETWORKS; SYSTEMS SO - Ieee Communications Letters 2004 ;8(10):629-631 10515 UI - 5454 AU - Cruz-Perez FA AU - Ortigoza-Guerrero L AD - IPN, CINVESTAV, Commun Sect, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, MexicoWireless Facil Inc, San Diego, CA 92121, USACruz-Perez, FA, IPN, CINVESTAV, Commun Sect, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, Mexico TI - Flexible resource allocation strategies for class-based QoS provisioning in mobile networks AB - Flexible resource-allocation (FRA) strategies have been proposed in the literature to mitigate the high blocking rate caused in high-speed mobile communication networks when resource aggregation is used to increase the data rate. In this paper, new FRA strategies that cope with scenarios with multiple service types and multiple priorities are proposed. These are called the FRA strategy with differentiated priorities and quality of service (FRAQoS) and the FRA strategy with prioritized levels (FRASPL). The main distinguishing feature of these strategies is their capacity to prioritize some service types over others. FRAQoS prioritizes the quality of service (QoS) of particular service types over others by introducing the concepts of prioritized call degradation and compensation. However, FRAQoS provides a limited ability to prioritize particular service types over the rest because any incoming call, irrespective of its service type and priority, may trigger resource reallocations to service it. The FRASPL overcomes this limitation by introducing a call-admission mechanism that, when necessary, rejects calls originated by low-priority service types. This enhances the protection to high-priority service types. By prioritizing some services over the others, FRASPL can trade off capacity against QoS. FRAQoS represents particular limiting cases of FRASPL. A mathematical model is developed to investigate the performance of FRAQoS and FRASPL. Then, they are compared with other FRA strategies in a scenario with multiple differentiated service types. Results show that the proposed strategies effectively prioritize service types, providing them with better QoS. This makes FRAQoS and FRASPL specially suitable for class-based QoS provisioning in mobile networks MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Telecommunications;Transportation Science & Technology U5 - J;Article AV - English IS - 0018-9545 UR - ISI:000221517200022 L2 - class-based quality-of-service (QoS) provisioning;multiservice systems;quality-of-service (QoS) differentiation;radio resource management;GSM DATA SERVICES; ADAPTIVE MULTIMEDIA; PCS; SCHEME SO - Ieee Transactions on Vehicular Technology 2004 ;53(3):805-819 10516 UI - 5604 AU - Cruz-Perez FA AU - Ortigoza-Guerrero L AD - IPN, CINVESTAV, Commun Sect, Mexico City 07360, DF, MexicoWFI, San Diego, CA 92122, USACruz-Perez, FA, IPN, CINVESTAV, Commun Sect, Mexico City 07360, DF, Mexico TI - Capacity optimization in wireless communication systems with mixed platforms AB - A mobility-aware call admission control (CAC) strategy for capacity optimization in mobile wireless communication systems is proposed. In the strategy, calls by slow moving users are intentionally dropped in a controlled manner to increase channel utilization. Results show that our CAC achieves 23.3% and 5.56% capacity gain relative to the Non Priority and Fractional Channel Reservation (FCR) strategies, respectively MH - Mexico|Distrito Federal MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Telecommunications U5 - J;Article AV - English IS - 1089-7798 UR - ISI:000221165500005 L2 - call dropping;capacity optimization;channel reservation;handoff prioritization;pre-emptive priority;CALL ADMISSION CONTROL; PERFORMANCE; RESERVATION SO - Ieee Communications Letters 2004 ;8(4):217-219 10517 UI - 5690 AU - Cruz-Perez FA AU - Ortigoza-Guerrero L AD - IPN, CINVESTAV, Mexico City 07360, DF, MexicoWFI, San Diego, CA 92121, USACruz-Perez, FA, IPN, CINVESTAV, Mexico City 07360, DF, Mexico TI - Flexible Resource Allocation with Partial Resource Sharing and minimum overflow for integrated services AB - Flexible Resource Allocation (FRA) strategies selectively control the transmission rates of users allowing them to specify maximum and minimum bandwidth requirements for the service type requested ensuring a minimum quality of service (QoS) is met. Complete, Partial, and Non Resource Sharing are the three types of resource sharing policies that can be used in systems with integrated services (voice, video and data) with different QoS and elasticities requirements. In this paper, an FRA strategy with Partial Resource Sharing, called Primary Unavailable Secondary Minimum (PUSMin), is presented. An analytical method is developed to assess its performance in an environment where several service types (with different bandwidth and elasticities requirements) exist. Results show that PUSMin decreases the resource reassignment rate as the offered traffic increases. This decreases the signalling overhead and computational complexity in the Base Station Controller (BSC) or Base Transceiver Station (BTS) MH - Mexico|Distrito Federal MH - USA PB - TOKYO: IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0916-8516 UR - ISI:000220779300004 L2 - flexible resource allocation;overflow;resource sharing;integrated services;resource reassignment;GSM DATA SERVICES; MOBILE NETWORKS; ASSIGNMENT; SCHEME; PCS; MULTIMEDIA; STRATEGY; QOS SO - Ieice Transactions on Communications 2004 ;E87B(4):826-837 10518 UI - 5687 AU - Cruz-Sanchez E AU - varez-Castro JF AU - Ramirez-Picado JA AU - Matutes-Aquino JA AD - Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoInst Tecnol Costa Rica, Escuela Ciencia & Ing Mat, Cartago, Costa RicaCruz-Sanchez, E, Ctr Invest Mat Avanzados, Complejo Ind Chihuahua,Miguel de Cervntes 120, Chihuahua 31109, Mexico TI - Study of titanomagnetite sands from Costa Rica AB - In Cahuita town, Limon province, at the Atlantic coast of Costa Rica there are titanotnagnetite sands. The chemical, structural and magnetic characterization of the titanomagnetite sands can clarify aspects of their geological formation; as well as suggest applications from them. The magnetic sand is composed mainly of titanomagnetite and hematite, with very small quartz impurities quantities, pyroxene, etc. The refinement of X-rays diffraction patterns by the method of Rietveld indicates an 86.03% in weight of titanomagnetite and a 13.97% in weight of hematite. The particles size of this magnetic sand have an interval of 75-300 mum and a specific surface area of 1.18 m(2)/g. The specific magnetization of the saturation of the sand is 55.8 emu/g and the intrinsic coercivity is 39.6 Oe. In this work a characterization of the titanomagnetite sands is presented the chemical composition was determined by absorption spectroscopy. The present crystalline phases were determined by X-ray diffraction. The morphology and composition of the particles were determined by scanning electron microscopy together with microanalytical techniques. The classification of the particles by shape and color were carried out using optical microscopy. The magnetic properties and the hyperfine structure were measured by vibrating sample magnetometry and Mossbauer spectroscopy. (C) 2003 Elsevier B.V. All rights reserved MH - Costa Rica MH - Mexico|Chihuahua PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500065 L2 - titanomagnetite minerals;magnetic properties;microstructure SO - Journal of Alloys and Compounds 2004 ;369(1-2):265-268 10519 UI - 5371 AU - Cruz P AU - Ibarra AM AU - Mejia-Ruiz H AU - Gaffney PM AU - Perez-Enriquez R AD - CIBNOR, Lab Genet Acuicola, La Paz 23000, Baja California, MexicoUniv Delaware, Coll Marine Studies, Lewes, DE 19958, USAPerez-Enriquez, R, CIBNOR, Lab Genet Acuicola, AP 128, La Paz 23000, Baja California, Mexico TI - Genetic variability assessed by microsatellites in a breeding program of pacific white shrimp (Litopenaeus vannamei) AB - Genetic diversity in a shrimp-breeding program was monitored for 2 generations by microsatellite DNA markers (Pvan1578 and Pvan1815) to establish levels of variation and proceed with a selection program. An increase in the number and frequencies of some alleles in both microsatellite loci from G(0) to G(2) was induced by foreign sire contributions. Most common alleles and high heterozygosities (around 70% in both loci) were maintained through the generations, indicating that there had not been a significant loss of genetic variability in the breeding program. However, when compared with variability mother wild and cultured stocks, the presence of 4 main alleles at both loci may be an indication that a certain reduction in variability already was present in the line used as founder stock (GO). Therefore, it is recommended that additional genetic variability be introduced to the breeding stock by crossing it with a different line MH - Mexico|Baja California MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 1436-2228 UR - ISI:000221764800007 L2 - pacific white shrimp;Litopenaeus vannamei;aquaculture;breeding program;genetic variability;microsatellites;DIVERSITY; STOCKS; WILD SO - Marine Biotechnology 2004 ;6(2):157-164 10520 UI - 4218 AU - Cseh J AU - Algora A AU - Darai J AU - Hess PO AD - Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryUniv Debrecen, Inst Expt Phys, H-4026 Debrecen, HungaryUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCseh, J, Hungarian Acad Sci, Inst Nucl Res, PF 51, H-4001 Debrecen, Hungary TI - Deformation dependence of nuclear clusterization AB - The allowed and forbidden binary cluster configurations of the ground, superdeformed, and hyperdeformed states of some nuclei are determined, based on the (real or effective) U(3) selection rule. The stability of the cluster configurations from the viewpoint of the binding energy is also investigated MH - Hungary MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000224325900024 L2 - SHELL-MODEL; ROTATIONAL BANDS; HYPERDEFORMED STATES; SPONTANEOUS FISSION; COLLECTIVE MOTION; GROUND-STATE; MEAN-FIELD; EXCITATIONS; SYMMETRY; SHAPES SO - Physical Review C 2004 ;70(3): 10521 UI - 6813 AU - Cuaron AD AU - Martinez-Morales MA AU - McFadden KW AU - Valenzuela D AU - Gompper ME AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Morelia 58089, Michoacan, MexicoColumbia Univ, Ctr Environm Res & Conservat, New York, NY 10027, USAUniv Autonoma Estado Morelos, Ctr Educ Ambiental & Invest Sierra Huautla, Cuernavaca 62210, Morelos, MexicoUniv Missouri, Dept Fisheries & Wildlife Sci, Columbia, MO 65211, USACuaron, AD, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Recursos Nat, Apartado Postal 27-3 Xangari, Morelia 58089, Michoacan, Mexico TI - The status of dwarf carnivores on Cozumel Island, Mexico AB - Cozumel Island in the Mexican Caribbean is inhabited by four carnivores, of which two, the Cozumel coati Nasua nelsoni and pygmy raccoon Procyon pygmaeus, are endemic species. The taxonomic status of a third carnivore, a dwarf gray fox Urocyon cinereoargenteus, is undetermined, but may deserve subspecific or species- level recognition. The fourth species, the kinkajou ( Potos flavus), may be a recent introduction. We review the status of these carnivores, report our field observations and results of line transect and trapping efforts, discuss current threats to these taxa, and make recommendations for their conservation. A population density of 0.43 +/- 0.27 coatis / km(2), and a total island population size of 150 +/- 95 individuals, was estimated from 386 km of line transects in 1994 - 1995. Intensive trapping efforts ( 1479 trap- nights) in 2001 at multiple localities were unsuccessful. Pygmy raccoons were observed in the mangrove and coastal wetland areas of the island and in 2001 we captured 11 individuals with the same sampling efforts as for coatis ( 8.8 raccoons/ 1000 trap- nights). The gray fox is also apparently very rare on the island. While a few observations of the animals have been made ( 1984, 1994 and 2001), no animals were seen along transects and none were trapped. The primary threats to the persistence of these taxa include introduced congeners, introduced predators, parasite and disease spill- over from exotic animals, habitat fragmentation, hunting and collection as pets, and hurricanes. We suggest that the Cozumel coati, pygmy raccoon, and the Cozumel population of the gray fox be considered as Critically Endangered according to the IUCN classification system. Current conservation actions focusing on Cozumel carnivores are extremely limited. We recommend eradication of introduced species, maintenance of habitat connectivity, ex situ conservation programs, explicit public policies on land- use and sustainable development, public awareness campaigns, and continuous scientific research and monitoring MH - Mexico|Michoacan MH - Mexico|Morelos MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000186971400003 L2 - conservation;Cozumel;island endemics;Nasua nelsoni;Potos flavus;Procyon pygmaeus;taxonomic status;Urocyon cinereoargenteus;Yucatan;WHITE-NOSED COATIS; BODY SIZE; BOA CONSTRICTOR; NASUA-NARICA; MAMMALS; PROCYONIDAE; WILDLIFE; ECOLOGY SO - Biodiversity and Conservation 2004 ;13(2):317-331 10522 UI - 4634 AU - Cuellar EL AU - Guenin G AU - Morin M AD - Inst Natl Sci Appl, UMR CNRS 5510, GEMPPM, F-69621 Villeurbanne, FranceUniv Autonoma Nuevo Leon, FIME, San Nicolas de los Garza 66450, NL, MexicoMorin, M, Inst Natl Sci Appl, UMR CNRS 5510, GEMPPM, Bat Blaise Pascal,7 Av Capelle, F-69621 Villeurbanne, France TI - Behaviour of strain-resistivity coupled measurements of Ti-Ni-Cu wires during thermal cycling under constant stress AB - When shape memory wires are submitted to thermal changes under constant load (thermomechanical cycles), the austenite to martensite or martensite to austenite changes lead to strain changes and electrical resistivity changes. In some favourable cases, a one to one linear correspondence exists between the strain (e) and the relative resistivity (Deltarho/rho(0)) changes. This linear curve can be used for example in robotic devices for control position. The control position quality depends on the strain-resistivity relationship and especially on its linearity and hysteresis for repeated thermal cycles. The Ti-45.0Ni-5.0Cu (at.%) alloy is a good candidate for this kind of activator because of its one step transformation and simple resistivity behaviour. The present paper is focussed on the behaviour of Deltarho/rho(0) ersus epsilon curves during thermal cycling of Ti-45.0Ni-5.0Cu wires submitted to constant stresses. The wires have been previously submitted to different thermomechanical treatments (cold drawing + heat treatments). The influence of the stress amplitude has been studied for each thermomechanical treatment. The results show that the Deltarho/rho versus epsilon curves depend on the stress amplitude as well as on previous thermomechanical treatments and that some optimal conditions can be deduced. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Nuevo Leon PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000223329900019 L2 - Ti-Ni based alloys;shape memory alloys;stress-assisted two way memory;electrical resistivity SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;378(1-2):115-118 10523 UI - 4517 AU - Cuellar FA AU - Vilalta A AU - Rull R AU - Vidal-Sicart S AU - Palou J AU - Ventura PJ AU - Pous E AU - Quinto L AU - Malvehy J AU - Marti R AU - Puig S AU - Vilella R AU - Soler J AU - Benitez D AU - Yachi E AU - Lecha M AU - Pons F AU - Conill C AU - Visa J AU - Castel T AD - Hosp Clin Barcelona, Dept Dermatol, Melanoma Unit, IDIBAPS, Barcelona 08036, SpainCONACYT, Mexico City, DF, MexicoHosp Clin Barcelona, IDIBAPS, Dermatol Serv, Barcelona 08036, SpainHosp Clin Barcelona, IDIBAPS, Dept Gen Surg, Barcelona 08036, SpainHosp Clin Barcelona, IDIBAPS, Dept Nucl Med, Barcelona 08036, SpainHosp Clin Barcelona, IDIBAPS, Dept Dermatopathol, Barcelona 08036, SpainHosp Clin Barcelona, IDIBAPS, Dept Biostat, Barcelona 08036, SpainHosp Clin Barcelona, IDIBAPS, Dept Immunol, Barcelona 08036, SpainHosp Clin Barcelona, IDIBAPS, Dept Radiat Oncol, Barcelona 08036, SpainCuellar, FA, Hosp Clin Barcelona, Dept Dermatol, Melanoma Unit, IDIBAPS, Villarroel 170, Barcelona 08036, Spain TI - Small cell melanoma and ulceration as predictors of positive sentinel lymph node in malignant melanoma patients AB - Malignant melanoma (MM) early lymph node (LN) metastasis usually appears first in the sentinel LN (SLN). Breslow thickness is the main factor considered in the selection of patients to be submitted to SUN biopsy. The present study aimed to describe other independent prognostic factors useful in SLN candidate selection. During one year, 94 MM patients (90 primary cutaneous MM with Breslow thickness greater than or equal to 0.76 mm, and four cutaneous relapses), were submitted to SLN biopsy in the Melanoma Unit at the Hospital Clinic, Barcelona, Spain. The prognostic factors studied were: Breslow thickness, Clark's level of invasion, mitotic rate, cellular type (small, epithelioid, fusocellular, sarcomatoid), vertical growth phase, regression >50%, severe vascularization, infiltrate (lymphocytic, plasmocytic), ulceration, neurotropism, intravascular/intraneural invasion, protein p16 expression and recurrence. Nineteen SUN (20.2%) were positive and 75 (79.8%) negative. No positive SLN occurred in MM with Breslow thickness less than or equal to 1.0 mm. Breslow thickness greater than or equal to 2 mm (P = 0.005), severe vascularization (P = 0.005), small cell (P = 0.000) and ulceration (P = 0.005) were significant prognostic factors by univariate analysis. Small cell (P = 0.008) and ulceration (P = 0.05) were also significant prognostic factors in a multivariate analysis. The probability of finding a positive SLN for small cell was 56.9% [95% confidence interval (CI), 26.8-82.6%]. The probability of positive SLN for ulceration was 35.5% (95% CI, 14.2-64.7%). For small cell and ulceration together the probability increased to 86.3% (95% CI, 54.3-97.1%). The results of this study corroborated ulceration as a prognostic factor for SLN candidate selection and for the first time we have described small cell melanoma morphology as a significant factor associated with positive SLN. (C) 2004 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Oncology;Dermatology;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0960-8931 UR - ISI:000223559600007 L2 - melanoma;sentinel lymph node biopsy;prognostic factors;small cell;ulceration;AMERICAN-JOINT-COMMITTEE; CANCER STAGING SYSTEM; VERTICAL GROWTH-PHASE; LESS-THAN-OR-EQUAL-TO-1 MM; PROGNOSTIC FACTORS; BIOPSY; METASTASIS; FEATURES; LYMPHADENECTOMY; EXPERIENCE SO - Melanoma Research 2004 ;14(4):277-282 10524 UI - 4867 AU - Cuevas-Reyes P AU - Quesada M AU - Hanson P AU - Dirzo R AU - Oyama K AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58190, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoCuevas-Reyes, P, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Antigua Carretera Patzcuaro 8701,Col Ex Hacienda, Morelia 58190, Michoacan, Mexico TI - Diversity of gall-inducing insects in a Mexican tropical dry forest: the importance of plant species richness, life-forms, host plant age and plant density AB - 1 We tested four hypotheses concerning the variation in species richness of gall-inducing insects (GII) in plant communities. We sampled deciduous and riparian habitats in a tropical dry forest at Chamela-Cuixmala Biosphere Reserve in western Mexico, that differ in phenology and moisture availability. 2 GII species richness might be expected to increase with the richness of host plant species, with life-form complexity of host plants (trees to shrubs, herbs and climbers), with host age or with host plant density. 3 We found 172 plant species, of which more were present in deciduous than in riparian habitats, but 34 (19.8%) occurred in both. A different GII species colonized each of 39 host species. Most GII species (69.2%) were gall midges (Cecidomyiidae). 4 We found a significant positive correlation between GII species richness and plant species richness in both deciduous and riparian habitats, suggesting that radiation of GII species may be associated with plant species richness. 5 Most of the GII species occurred on trees or shrubs rather than herbs or climbers, consistent with structural complexity providing more colonization sites. 6 The frequency of GII was greater on saplings, which may have more undifferentiated meristems susceptible to gall induction. 7 Both the frequency and intensity of damage by galls were greater in deciduous than riparian habitats, indicating a preference of GII species for plants in the more xeric habitat. 8 The frequency of GII increased with host plant density in only 18 (46.2%) of GII species. 9 Richness of GII depends on all proposed factors, although density is often the least important. The effects of host richness and host age are similar to those seen in many specialist folivorous insects, although the unique association of a single insect with a single host is only seen for GII MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Plant Sciences;Ecology U5 - J;Article AV - English IS - 0022-0477 UR - ISI:000222869400014 L2 - gall species richness;herbivory;host plant age;life-forms;plant density;plant species richness;plant-animal interactions;tropical dry forest;REGIONAL PROCESSES; EUURA-MUCRONATA; CREOSOTE BUSH; RAIN-FORESTS; ATTACK; HERBIVORY; TREE; COMMUNITIES; PATTERNS; CECIDOMYIIDAE SO - Journal of Ecology 2004 ;92(4):707-716 10525 UI - 4211 AU - Cuevas-Yanez E AU - Serrano JM AU - Huerta G AU - Muchowski JM AU - Cruz-Almanza R AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRoche Palo Alto, Chem, Palo Alto, CA 94304, USACuevas-Yanez, E, Univ Nacl Autonoma Mexico, Inst Quim, Circutio Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Copper carbenoid mediated N-alkylation of imidazoles and its use in a novel synthesis of bifonazole AB - 1H-Imidazoles are readily N-alkylated by a Cu(acac)(2) mediated reaction with alpha-diazocarbonyl compounds or with diazoalkanes generated in situ from the corresponding p-toluensulfonyl hydrazones. The antifungal agent bifonazole was prepared by the latter method. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000224234500004 L2 - copper;carbenoid;imidazole;bifonazole;FURANYL DIAZO KETONES; IN-SITU GENERATION; INTRAMOLECULAR CYCLOPROPANATION; NITROGEN-HETEROCYCLES; STEVENS <1,2>-SHIFT; RHODIUM(II) ACETATE; ALPHA-DIAZOKETONES; CARBONYL-COMPOUNDS; AMMONIUM YLIDES; DERIVATIVES SO - Tetrahedron 2004 ;60(42):9391-9396 10526 UI - 6074 AU - Cuevas-Yanez E AU - Muchowski JM AU - Cruz-Almanza R AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoRoche Palo Alto, Palo Alto, CA 94304, USACuevas-Yanez, E, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Metalation of alpha-diazocarbonyl compounds using Grignard reagents. A convenient synthesis of alpha-diazo-beta-ketoesters and mixed esters of alpha-diazomalonate AB - alpha-Diazocarbonyl compounds react with methylmagnesium bromide at -78 degreesC generating the corresponding alpha-diazo-alpha-bromornagnesio species, which can be intercepted by various electrophilic reagents. For example, with alkyl chloroformates alpha-diazo-beta-ketoesters or mixed esters of alpha-diazomalonate are obtained in good yields. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000220011000035 L2 - diazoketone;Grignard reagent;diazoketoester;diazomalonate;CARBONYL-COMPOUNDS; SUBSTITUTED CARBENES; DIAZOKETONES; ACYLDIAZOMETHANES; REARRANGEMENT; DIAZOALKANES; DERIVATIVES; DIKETONES; ALDEHYDES; KETONES SO - Tetrahedron Letters 2004 ;45(11):2417-2419 10527 UI - 6244 AU - Cuevas-Yanez E AU - Muchowski JM AU - Cruz-Almanza R AD - UNAM, Inst Quim, Mexico City 04510, DF, MexicoRoche Palo Alto, Dept Chem, Palo Alto, CA 94304, USACuevas-Yanez, E, UNAM, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Rhodium(II) catalyzed intramolecular insertion of carbenoids derived from 2-pyrrolyl and 3-indolyl alpha-diazo-beta-ketoesters and alpha-diazoketones AB - alpha-Diazo-beta-ketoesters and alpha-diazoketones derived from 2-pyrrolylacetic, 2-pyrrolylpropionic, 3-indolylacetic and 3-indolylpropionic acids afforded carbenoid derived cyclization products on treatment with catalytic rhodium(II) acetate. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000188785600007 L2 - rhodium carbenoids;alpha-diazo-beta-ketoesters;alpha-diazoketones;insertion pyrrol,indol;PYRROLE DERIVATIVES; INDOLE; ACIDS SO - Tetrahedron 2004 ;60(7):1505-1511 10528 UI - 4019 AU - cuna-Soto R AU - Stahle DW AU - Therrell MD AU - Griffin RD AU - Cleaveland MK AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoUniv Arkansas, Dept Geosci, Tree Ring Lab, Fayetteville, AR 72701, USAAcuna-Soto, R, Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - When half of the population died: the epidemic of hemorrhagic fevers of 1576 in Mexico AB - During the l6th century, Mexico suffered a demographic catastrophe with few parallels in world's history. In 1519, the year of the arrival of the Spaniards, the population in Mexico was estimated to be between 15 and 30 million inhabitants. Eighty-one years later, in 1600, only two million remained. Epidemics (smallpox, measles, mumps), together with war, and famine have been considered to be the main causes of this enormous population loss. However, re-evaluation of historical data suggests that approximately 60-70% of the death toll was caused by a series of epidemics of hemorrhagic fevers of unknown origin. In order to estimate the impact of the 1576 epidemic of hemorrhagic fevers on the population we analyzed the historical record and data from the 1570 and 1580 censuses of 157 districts. The results identified several remarkable aspects of this epidemic: First, overall, the population loss for these 157 districts was 51.36%. Second, there was a clear ethnic preference of the disease, the Spanish population was minimally affected whereas native population had high mortality rate. Third, the outbreak originated in the valleys of central Mexico whence it evolved as an expansive wave. Fourth, a positive correlation between altitude and mortality in central Mexico was found. Fifth, a specific climatic sequence of events was associated with the initiation and dissemination of the hemorrhagic fevers. Although the last epidemic of hemorrhagic fevers in Mexico ended in 1815, many questions remain to be answered. Perhaps the most relevant ones are whether there is a possible reemergence of the hemorrhagic fevers and how vulnerable we are to the disease. (D 2004 Federation of European Microbiological Societies. Published by Elsevier B.V.. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Review AV - English IS - 0378-1097 UR - ISI:000224848800001 L2 - hemorrhagic fevers;Mexico;epidemics;OUTBREAK SO - Fems Microbiology Letters 2004 ;240(1):1-5 10529 UI - 3781 AU - Cupp EW AU - Duke BO AU - Mackenzie CD AU - Guzman JR AU - Vieira JC AU - Mendez-Galvan J AU - Castro J AU - Richards F AU - Sauerbrey M AU - Dominguez A AU - Eversole RR AU - Cupp MS AD - Auburn Univ, Dept Entomol & Plant Pathol, Auburn, AL 36849, USARiver Blindness Fdn, Lancaster LA1 1YH, EnglandMichigan State Univ, Filarial Dis Unit, E Lansing, MI 48824, USANatl Program Eliminat Onchocerciasis Ecuador, Guayaquil, EcuadorVector Borne Dis Program, Secretariat Hlth, Mexico City, DF, MexicoVector Borne Dis Program, Minist Publ Hlth & Social Assistance, Guatemala City, GuatemalaCtr Dis Control & Prevent, Epidemiol Branch, Atlanta, GA 30341, USAProgram Eliminat Onchocerciasis Amer, Guatemala City, GuatemalaWestern Michigan Univ, Biol Imaging Ctr, Kalamazoo, MI 49008, USACupp, EW, Auburn Univ, Dept Entomol & Plant Pathol, Auburn, AL 36849 USA TI - The effects of long-term community level treatment with ivermectin (Mectizan((R))) on adult Onchocerca volvulus in Latin America AB - The objective of this study was to examine nodules from Mexico, Guatemala, and Ecuador collected over a one-year period (2001) to determine the effects of semi-annual ivermectin treatments on Onchocerca volvulus macrofilarial populations. Nodules were sectioned, stained with hematoxylin and eosin, and histologic findings were compared between countries and with historical data prior to the introduction of ivermectin into the region. Nodules from Ecuador had 10 times more dead or moribund worms than the historical control (66.6% versus 6.5%); nodules from patients from Mexico and Guatemala did not differ from the control. More than 80% of the female worms in each country were uninseminated and producing unfertilized oocytes. Nodules containing mates differed in each country from the historical control (P < 0.0001), with presence of mates ranging from 19.7% in Mexico to 13.6% in Ecuador versus 73% in the control. Nodules with females producing active microfilariae ranged from 7.8% (Mexico) to 2.7% (Ecuador) versus 60% in the historical control (P < 0.0001). Nodules from Ecuador and Mexico were significantly smaller in size than those from Guatemala or historical controls (P < 0.0005). These results depict a deteriorating condition of adult O. volvulus populations in Mexico, Guatemala and Ecuador, indicating that semi-annual ivermectin treatment of greater than or equal to6 years has had a profound effect on survival and reproduction of this species MH - Ecuador MH - United Kingdom MH - Guatemala MH - Mexico|Distrito Federal MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 5 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000225473200016 L2 - POLYMERASE-CHAIN-REACTION; WEST-AFRICA; TRANSMISSION; POPULATION; COMPETENCE; ECUADOR SO - American Journal of Tropical Medicine and Hygiene 2004 ;71(5):602-607 10530 UI - 5635 AU - Curt C AU - Trystram G AU - Nogueira-Terrones H AU - Hossenlopp J AD - INRA, INAPG, ENSIA,Equipe Automat & Qual Alimentaire, Cemagref,UMR Genie Ind Alimentaire, F-63172 Aubiere, FranceENSIA, INRA, INAPG, UMR Genie Ind Alimentaire, F-91744 Massy, FranceInst Tecnol Tuxtepec, Tuxtepec 68350, Oaxaca, MexicoCurt, C, INRA, INAPG, ENSIA,Equipe Automat & Qual Alimentaire, Cemagref,UMR Genie Ind Alimentaire, 24 Ave Landais,BP 50085, F-63172 Aubiere, France TI - A method for the analysis and control of sensory properties during processing - application to the dry sausage process AB - The sensory quality of a food comes from the combination of a set of parameters concerning all the steps of product life, from the raw materials to the conditions of preparation at home. We focus on manufacturing conditions and propose a method for the control of a set of sensory properties and defects whose variations must be kept within prescribed tolerances. This method entails, firstly, the identification of causes of variations of sensory quality, i.e., the definition of the scenarios leading to defects or faulty properties; secondly, the determination of control methods used by the factory, i.e., the corrective actions used to avoid or eliminate a defect or a deviation of a sensory property; and thirdly, the proposal of a strategy for improving sensory quality control. The method is illustrated by dry sausage manufacturing in two different factories. In both, the method enables proposing the improvement of sensory quality control, i.e., by a formal description of the skill concerning process control possessed by operators. A control system based on this formalized knowledge was implemented. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Oaxaca PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0956-7135 UR - ISI:000221033600003 L2 - sensory quality;process control;dry sausage;human decision;FAULT-DIAGNOSIS; SYSTEM; IMPLEMENTATION; SUPERVISION; INTEGRATION SO - Food Control 2004 ;15(5):341-349 10531 UI - 6097 AU - Curtis BD AU - Hurtak JJ AD - Acad Future Sci, Los Gatos, CA, USASAGE, Oceanside, CA, USAUniv Autonoma Metropolitana, Mexico City, DF, MexicoCurtis, BD, 691 5th Ave, San Francisco, CA 94118, USA TI - Consciousness and quantum information processing: Uncovering the foundation for a medicine of light AB - Great progress has been made by Russian and German researchers in recent years (Popp, Voeikov, and others) to examine the biophysical aspects of biophotonic processes in humans. This paper suggests that there is a many-body reality to the way biophysical light interacts with the human self-organization of information that may be achieved by means of biomolecular, metabolic, or neural communication. These systems may merge as mobile energy relay systems similar to what is seen as qi processes in acupuncture science, suggesting a "holomovement" that seeks to confirm itself and increasingly retrieves and uses only the information that serves its exchanges with the environment. This coevolution of evolutionary process levels, expressed in process terms, can be seen as a foundation for a Medicine of Light integrating hidden variables in consciousness studies with functional differentiation and new findings in the biologic sciences MH - Mexico|Distrito Federal MH - USA PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Integrative & Complementary Medicine U5 - J;Article AV - English IS - 1075-5535 UR - ISI:000189326900009 L2 - BRAIN; SYSTEM SO - Journal of Alternative and Complementary Medicine 2004 ;10(1):27-39 10532 UI - 4206 AU - Cuzon G AU - Arena L AU - Goguenheim J AU - Goyard E AD - IFREMER, Lab Aquaculture Trop, Taravao 98719, Tahiti, Fr PolynesiaUNAM, Lab Ecophysiol, Playa Norte, Campeche, MexicoCuzon, G, IFREMER, Lab Aquaculture Trop, BP 7004, Taravao 98719, Tahiti, Fr Polynesia TI - Is it possible to raise, offspring of the 25th generation of Litopenaeus vannamei (Boone) and 18th generation Litopenaeus stylirostris (Stimpson) in clear water to 40 g? AB - Peneid shrimp are commonly reared in clear-water aquaria or tanks for short-term studies of 4-6 weeks during controlled experiments, such as nutrition studies to estimate dietary nutrient requirements. Recently, in line with the genetic program at Centre Oceanologique du Pacifique (COP), experimental clear-water facilities were tested for the first time over a longer rearing period. Environmental conditions used to maintain animal growth in clear-water system using a well-balanced diet were defined. After 100 days, shrimp growth rates tended to decrease and only by adjusting the diet could shrimp complete their life cycle and reach maturation size of around 40 g. This paper presents information on stocking density, diet quality and husbandry linked to reproduction that must be considered to successfully rear animals from PL's to breeder size in clear water. By following these protocols a minimum amount of breeders can be used to meet production goals. Moreover, by isolating a small group of individuals, genetic diversity can be preserved, thereby allowing specific crosses for selective breeding purposes. Length of trials, amount of feed, composition of feed, growth performances and maturation success are reported and should encourage further studies to optimize rearing conditions in clear-water rearing MH - Fr Polynesia MH - Mexico|Campeche PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000224444000009 L2 - shrimp;Litopenaeus stylirostris;quarantine;husbandry;formulated diets;PENAEUS-MONODON FABRICIUS; RECIRCULATION SYSTEMS; NEW-CALEDONIA; SHRIMP; MATURATION; PROFILES; GROWTH; DIETS; TANKS SO - Aquaculture Research 2004 ;35(13):1244-1252 10533 UI - 5480 AU - Cuzon G AU - Lawrence A AU - Gaxiola G AU - Rosas C AU - Guillaume J AD - IFREMER, Taravao, Tahiti, Fr PolynesiaTexas A&M Univ, Port Aransas, TX, USAUNAM, Fac Ciencias, Mexico City, DF, MexicoINRA, IFREMER, F-29080 Plouzane, FranceCuzon, G, IFREMER, BP7004, Taravao, Tahiti, Fr Polynesia TI - Nutrition of Litopenaeus vannamei reared in tanks or in ponds AB - (T)he Pacific white shrimp Litopenaeus vannamei (Boone) is the most important shrimp species cultivated in the Americas. More than 90% of the shrimp cultivated in 1998 on the American continent (132000 tons) was L. vannamei. L. vannamei is the species cultivated especially in Ecuador and Mexico. Its growth potential is quite good and it is a hardy species in spite of virus diseases, such as IHHN or, to a certain extent, other pathogens such as WSSv (depending on pond management). Regarding feed, it represents the species with the best opportunity at reduced protein level; plant protein and carbohydrates available in their habitat to be channeled into tissue. A review of some requirements of juveniles is provided while emphasis is put on cost reduction, pond utilization and, generally speaking, on sustainable production. From an experimental point of view, nutritional requirements for protein, copper, zinc, calcium, phosphorous and some vitamins are examined based on data accumulated by Texas A&M, Ifremer/COP/Tahiti, Ifremer/Brest, UNAM/Mexico, and several other research centers. Pond production results are extended to pens or ponds as well as to some feeding aspects in large semi-intensive ponds or super-intensive conditions. Experiments conducted with a "bacterial flock" (moulinettes) evidenced the beneficial role of bacteria. If temperature is around 27 degreesC, it is feasible to target for a double crop a year. A well-balanced feed, in super-intensive culture is achieved without use of additives (probiotics, immunostimulants). L. vannamei is the species in which most research has been concentrated to understand better shrimp nutrition and physiology, and in which the relationship between nutrition and genetics can currently be studied thanks to the existence of highly inbred strains. (C) 2004 Elsevier B.V. All rights reserved MH - Fr Polynesia MH - France MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Review AV - English IS - 0044-8486 UR - ISI:000221547500037 L2 - larvae;juveniles;breeders;shrimp;peneid;nutrition;SHRIMP PENAEUS-VANNAMEI; FATTY-ACID-COMPOSITION; DIETARY-PROTEIN LEVEL; PACIFIC WHITE SHRIMP; OPEN THELYCUM SHRIMP; CRUSTACEA-DECAPODA; OXYGEN-CONSUMPTION; DIGESTIVE ENZYMES; PALAEMON-SERRATUS; DISSOLVED-OXYGEN SO - Aquaculture 2004 ;235(1-4):513-551 10534 UI - 4874 AU - Cziczo DJ AU - Demott PJ AU - Brooks SD AU - Prenni AJ AU - Thomson DS AU - Baumgardner D AU - Wilson JC AU - Kreidenweis SM AU - Murphy DM AD - NOAA, Aeron Lab, Boulder, CO 80303, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAColorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv Denver, Dept Engn, Denver, CO 80208, USACziczo, DJ, NOAA, Aeron Lab, 325 Broadway,R-AL6, Boulder, CO 80303, USA TI - Observations of organic species and atmospheric ice formation AB - Aerosol particles found in the lower confines of the atmosphere are typically internal mixtures of sulfate, inorganic salts, refractory components, and organic species. The effect these complex combinations have on cloud formation processes remains largely unknown. We have conducted two complementary studies on one important process, the homogeneous formation of ice by small particles. In the first study the freezing of atmospheric aerosol was induced using controlled temperature and humidity conditions. In the second study the chemical composition of the residue from ice crystals in high altitude clouds was analyzed. Here we show that organic components do not partition equally to the ice and aqueous phases. Instead, organic-rich particles preferentially remain unfrozen. These results suggest that emissions of organic species have the potential to influence aerosol-cold cloud interactions and climate MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 11 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000222779500002 L2 - MASS-SPECTROMETRY; AEROSOLS; STRATOSPHERE; NUCLEATION; PARTICLES; DROPLETS; NUCLEI; CLOUDS; WATER SO - Geophysical Research Letters 2004 ;31(12): 10535 UI - 4349 AU - D'Suze G AU - Batista CVF AU - Frau A AU - Murgia AR AU - Zamudio FZ AU - Sevcik C AU - Possani LD AU - Prestipino G AD - CNR, Ist Biofis, I-16149 Genoa, ItalyInst Venezolano Invest Cient, Biochem & Biophys Ctr, Lab Cellular Neuropharmacol, Caracas 1020A, VenezuelaNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med, Cuernavaca 62210, Morelos, MexicoPrestipino, G, CNR, Ist Biofis, Via Marini 6, I-16149 Genoa, Italy TI - Discrepin, a new peptide of the sub-family alpha-ktx15, isolated from the scorpion Tityus discrepans irreversibly blocks K+-channels (I-A currents) of cerebellum granular cells AB - A new peptide was purified from the venom of the Venezuelan scorpion Tityus discrepans, by high-performance liquid chromatography and its amino acid sequence was completed by Edman degradation and mass spectrometry analysis. It contains 38 amino acid residues with a molecular weight of 4177.7 atomic mass units, tightly folded by three disulfide bridges, and has a pyroglutamic acid at the N-terminal region. This peptide, named Discrepin, was shown to block preferentially the I-A currents of the voltage-dependent K+-channel of rat cerebellum granular cells in culture. The K+-currents are inhibited in an apparently irreversible manner, whose 50% inhibitory effect is reached with a 190nM toxin concentration. The systematic nomenclature proposed for this toxin is alpha-KTx15.6. (C) 2004 Elsevier Inc. All rights reserved MH - Italy MH - Mexico|Morelos MH - Venezuela PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0003-9861 UR - ISI:000224104500017 L2 - amino acid sequence;cerebellum granular cells;K+-channel;patch-clamp;scorpion toxin;Tityus discrepans;TOXINS; FAMILY; VENOM; EVOLUTION; TOOLS SO - Archives of Biochemistry and Biophysics 2004 ;430(2):256-263 10536 UI - 5649 AU - D'Suze G AU - Sevcik C AU - Corona M AU - Zamudio FZ AU - Batista CVF AU - Coronas FI AU - Possani LD AD - Inst Venezolano Invest Cient, Biochem & Biophys Ctr, Lab Cellular Neuropharmacol, Caracas 1020A, VenezuelaNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoD'Suze, G, Inst Venezolano Invest Cient, Biochem & Biophys Ctr, Lab Cellular Neuropharmacol, Apartado 21827, Caracas 1020A, Venezuela TI - Ardiscretin a novel arthropod-selective toxin from Tityus discrepans scorpion venom AB - A new arthropod selective toxin was purified from the venom of the Venezuelan scorpion Tityus discrepans, and its amino acid sequence, cDNA clone and biological activity are reported here. The amino acid sequence of this peptide, named ardiscretin (from arthropod toxin of T. discrepans) was completed by Edman degradation and mass spectrometry. It is a single polypeptide composed by 61 amino acids with an amidated cysteine residue at the C-terminal end, closely packed by four disulfide bridges. The atomic mass unit (a.m.u.) experimentally determined was 7103.8 a.m.u. This peptide was shown to be specific for invertebrates (crickets, triatomides, crabs and squids), but non-toxic to mice, at the dose assayed. Ardiscretin inhibits the Nat(+) -currents of squid giant axons in an apparent irreversible manner, whose inhibitory effect is reached at 30 muM toxin concentration. Sequence comparison showed that it is phylogenetically closely related to insect-specific scorpion toxins. Ardiscretin produced a small depolarization and induced repetitive firing in squid axons resembling those of DDT [1,1(1)(p-chlorobenzyl)2-tricloretane] in its ability to slow down action potential, to induce repetitive firing, and in that the concentration required for any effect in squid axon is rather high. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000221021900005 L2 - cDNA;Na+-channel;sequence;scorpion toxin;squid giant axon;Tityus discrepans;AMINO-ACID-SEQUENCE; SODIUM-CHANNEL; ANDROCTONUS-AUSTRALIS; INSECT TOXIN; GIANT-AXONS; CENTRUROIDES; SERRULATUS; PEPTIDES; GENES; PURIFICATION SO - Toxicon 2004 ;43(3):263-272 10537 UI - 4473 AU - da-Silva WS AU - Gomez-Puyou A AU - de Gomez-Puyou MT AU - Moreno-Sanchez R AU - De Felice FG AU - de Meis L AU - Oliveira MF AU - Galina A AD - Univ Fed Rio de Janeiro, Inst Ciencias Biomed, Dept Bioquim Med, BR-21941590 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoInst Nacl Cardiol, Dept Bioquim, Mexico City 14080, DF, MexicoOliveira, MF, Univ Fed Rio de Janeiro, Inst Ciencias Biomed, Dept Bioquim Med, Av Brigadeiro Trompowsky S-N,CCS,Bloco E,Sala E-0, BR-21941590 Rio De Janeiro, Brazil TI - Mitochondrial bound hexokinase activity as a preventive antioxidant Defense - Steady-state ADP formation as a regulatory mechanism of membrane potential and reactive oxygen species generation in mitochondria AB - Brain hexokinase is associated with the outer membrane of mitochondria, and its activity has been implicated in the regulation of ATP synthesis and apoptosis. Reactive oxygen species (ROS) are by-products of the electron transport chain in mitochondria. Here we show that the ADP produced by hexokinase activity in rat brain mitochondria (mt-hexokinase) controls both membrane potential (DeltaPsi(m)) and ROS generation. Exposing control mitochondria to glucose increased the rate of oxygen consumption and reduced the rate of hydrogen peroxide generation. Mitochondrial associated hexokinase activity also regulated DeltaPsi(m), because glucose stabilized low DeltaPsi(m) values in state 3. Interestingly, the addition of glucose 6-phosphate significantly reduced the time of state 3 persistence, leading to an increase in the DeltaPsi(m) and in H2O2 generation. The glucose analogue 2-deoxyglucose completely impaired H2O2 formation in state 3-state 4 transition. In sharp contrast, the mt-hexokinase-depleted mitochondria were, in all the above mentioned experiments, insensitive to glucose addition, indicating that the mt-hexokinase activity is pivotal in the homeostasis of the physiological functions of mitochondria. When mt-hexokinase-depleted mitochondria were incubated with exogenous yeast hexokinase, which is not able to bind to mitochondria, the rate of H2O2 generation reached levels similar to those exhibited by control mitochondria only when an excess of 10-fold more enzyme activity was supplemented. Hyperglycemia induced in embryonic rat brain cortical neurons increased ROS production due to a rise in the intracellular glucose 6-phosphate levels, which were decreased by the inclusion of 2-deoxyglucose, N-acetyl cysteine, or carbonyl cyanide p-trifluoromethoxyphenylhydrazone. Taken together, the results presented here indicate for the first time that mt-hexokinase activity performed a key role as a preventive antioxidant against oxidative stress, reducing mitochondrial ROS generation through an ADP-recycling mechanism MH - Brazil MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 26 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000223791500080 L2 - MANGANESE SUPEROXIDE-DISMUTASE; RAT-BRAIN HEXOKINASE; APOPTOTIC CELL-DEATH; CYTOCHROME-C; HYDROGEN-PEROXIDE; OXIDATIVE-PHOSPHORYLATION; ENERGY-METABOLISM; INTRAMITOCHONDRIAL COMPARTMENTS; INTRACELLULAR-LOCALIZATION; MAMMALIAN HEXOKINASE SO - Journal of Biological Chemistry 2004 ;279(38):39846-39855 10538 UI - 3496 AU - Da Fonseca CRV AU - Reyes-Castillo P AD - Inst Nacl de Pesquisas da Amazonia, Coordenacao Pesquisas Entomol, BR-69011970 Manaus, Amazonas, BrazilUniv Estado Amazonas, Escola Super Ciencias Saude, BR-69065001 Manaus, Amazonas, BrazilInst Ecol AC, Xalapa 91000, Veracruz, MexicoDa Fonseca, CRV, Inst Nacl de Pesquisas da Amazonia, Coordenacao Pesquisas Entomol, Caixa Postal 478, BR-69011970 Manaus, Amazonas, Brazil TI - Synopsis on Passalidae family (Coleoptera : Scarabaeoidea) of Brazil with description of a new species of Veturius Kaup, 1871 AB - Even though a huge area of the country remains untouched, two tribes, eight genera and ninety-eight species of Passalidae are found in Brazil until now. Specialists described many taxa and gave both immature and adult taxonomic characteristics, showing bionomic aspects, which are shown in this paper. A checklist of Brazilian species is presented in this study with geographic distribution data. Veturius criniferous sp. nov. from Rondonia, Brazil is described and illustrated MH - Brazil MH - Mexico|Veracruz PB - AUCKLAND: MAGNOLIA PRESS RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Review AV - English IS - 1175-5334 UR - ISI:000226000500001 L2 - Brazil;Coleoptera;Passalidae;taxonomy;bionomics;Veturius;AMAZONIAN FORELAND BASIN SO - Zootaxa 2004 ;(789):1-26 10539 UI - 6672 AU - Da Silva A AU - Andraud C AU - Lafait J AU - Robin T AU - Barrera RG AD - Univ Paris 06, Lab Opt Solides, F-75252 Paris 05, FranceEureka Technol, F-92220 Bagneux, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoLafait, J, Univ Paris 06, Lab Opt Solides, Case 80,4 Pl Jussieu, F-75252 Paris 05, France TI - A model of the angular distribution of light scattered by multilayered media AB - A model for calculating the spatial distribution of light flux scattered from multilayered inhomogeneous media, with index of refraction mismatches between layers, is described. By separating volume and surface properties, a compact matrix formulation is constructed for the solution of this problem, based on the application of the Discrete Ordinate Method to solve the Radiative Transfer Equation. Results are compared with those obtained with other techniques in order to evaluate the accuracy and efficiency of the proposed method. An optimization of the numerical procedure has been achieved, allowing application of the method to systems with a large number of slabs MH - France MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000187327800001 L2 - DISCRETE ORDINATE METHOD; RADIATIVE-TRANSFER; MULTIPLE-SCATTERING; ATMOSPHERES SO - Journal of Modern Optics 2004 ;51(3):313-332 10540 UI - 5992 AU - da Silva SMB AU - Silva-Werneck JO AU - Falcao R AU - Gomes AC AU - Fragoso RR AU - Quezado MT AU - Neto OBO AU - Aguiar JB AU - De Sa MFG AU - Bravo A AU - Monnerat RG AD - Embrapa Recursos Genet & Biotecnol, BR-70849970 Brasilia, DF, BrazilUNAM, Inst Biotecnol, Cuernavaca, Morelos, MexicoMonnerat, RG, Embrapa Recursos Genet & Biotecnol, CP 02372,Parque Estacao Biol, BR-70849970 Brasilia, DF, Brazil TI - Characterization of novel Brazilian Bacillus thuringiensis strains active against Spodoptera frugiperda and other insect pests AB - Brazilian strains of Bacillus thuringiensis, namely S701, S764 and S1265 were analysed regarding their cry gene and protein contents, crystal type, and activity against larvae of the lepidopteran fall armyworm (Spodoptera frugiperda Smith), the velvet caterpillar (Anticarsia gemmatalis), the dipterans (Culex quinquefasciatus and Aedes aegypti) and the coleopteran (Tenebrio molitor). The LC50 of the strains against second instar larvae of S. frugiperda or A. gemmatalis revealed a high potency against those insect species. The spore-crystal mixtures of the isolates were analysed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and showed similar protein pattern as the B. thuringiensis subsp. kurstaki strain HD-1 (proteins approximately 130 and 65 kDa) for isolates S701 and S764, respectively, and only one major protein of approximately 130 kDa for isolate S1265. The polymerase chain reaction (PCR) using total DNA of the isolates and general and specific primers showed the presence of cry1Aa, cry1Ac, cry1Ia and cry2Ab genes in the two isolates serotyped as B. thuringiensis kurstaki (S701 and S764) and the presence of cry1D and cry2Ad in B. thuringiensis morrisoni S1265 strain. Scanning electron microscopy of strains S701 and S764, showed the presence of bipyramidal, cuboidal and round crystals, like in strain HD-1 and bipyramidal and round crystals like in strain S1265 MH - Brazil MH - Mexico|Morelos PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 1439-0418 UR - ISI:000220175600004 L2 - Anticarsia gemmantalis;Bacillus thuringiensis;Spodoptera frugiperda;biological control;crystal protein;cry genes;CRYSTAL PROTEINS; DELTA-ENDOTOXIN; GENES; LEPIDOPTERA; NOCTUIDAE; COLLECTION; KURSTAKI; TOXIN; CELLS; CRYI SO - Journal of Applied Entomology 2004 ;128(2):102-107 10541 UI - 4829 AU - da Silveira ICA AU - Calado L AU - Castro BM AU - Cirano M AU - Lima JAM AU - Mascarenhas ADS AD - Univ Sao Paulo, Inst Oceanog, Dept Oceanog Fis Quim & Geol, BR-05508900 Sao Paulo, BrazilUniv Fed Bahia, Ctr Pesquisa Geofis & Geol, BR-40170280 Salvador, BA, BrazilPetr Brasileiro SA, Ctr Pesquisas Leopoldo A Miguez de Mello, BR-21949900 Rio De Janeiro, BrazilUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22860, Baja California, Mexicoda Silveira, ICA, Univ Sao Paulo, Inst Oceanog, Dept Oceanog Fis Quim & Geol, Praca Oceanog 191, BR-05508900 Sao Paulo, Brazil TI - On the baroclinic structure of the Brazil Current-Intermediate Western Boundary Current system at 22 degrees-23 degrees AB - The baroclinic structure of the Brazil Current( BC)Intermediate Western Boundary Current (IWBC) at 22 degrees-23 degreesS was investigated. A reanalysis of the pioneer velocity profile measurements of the TRANSCOBRA Experiment [ Evans and Signorini, 1985] revealed that the BC-IWBC system is about 75 - 80% baroclinic. Mapped velocity structure showed flow reversal at about 450 m, an IWBC thickness of 1200 m and core velocities exceeding 0.30 m s(-1). Total ( baroclinic) transports for BC ( southwestwards) and IWBC (northeastwards) were 5.6 (4.2) Sv and 3.6 (4.1) Sv, respectively. The strong baroclinic character of the BC-IWBC system and the lack of direct velocity observations in the area yielded us to propose the use of the cross-shelf version of the Princeton Ocean Model to generate absolute baroclinic velocities from hydrographic data. These velocities presented a similar reversal depth, and the transports of about 6 - 7 Sv for both BC-IWBC were also comparable to values reported in the literature MH - Brazil MH - Mexico|Baja California PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000222915500003 L2 - CIRCULATION; TRANSPORT; ATLANTIC SO - Geophysical Research Letters 2004 ;31(14): 10542 UI - 5609 AU - Dabberdt WF AU - Carroll MA AU - Baumgardner D AU - Carmichael G AU - Cohen R AU - Dye T AU - Ellis J AU - Grell G AU - Grimmond S AU - Hanna S AU - Irwin J AU - Lamb B AU - Madronich S AU - McQueen J AU - Meagher J AU - Odman T AU - Pleim J AU - Schmid HP AU - Westphal DL AD - Vaisala, Boulder, CO 80307, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Iowa, Iowa City, IA, USAUniv Calif Berkeley, Berkeley, CA 94720, USASonoma Technol Inc, Petaluma, CA, USALawrence Livermore Natl Lab, Livermore, CA, USANOAA, Boulder, CO, USAIndiana Univ, Bloomington, IN, USAHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USANOAA, Res Triangle Pk, NC, USAWashington State Univ, Pullman, WA 99164, USANatl Ctr Atmospher Res, Boulder, CO 80307, USANOAA, Silver Spring, MD, USAGeorgia Inst Technol, Atlanta, GA 30332, USANaval Res Lab, Monterey, CA, USADabberdt, WF, Vaisala, POB 3659, Boulder, CO 80307, USA TI - Meteorological research needs for improved air quality forecasting - Report of the 11th prospectus development team of the US Weather Research Program AB - The U.S. Weather Research Program convenes expert working groups on a one-time basis to identify critical research needs in various problem areas. The most recent expert working group was charged to "identify and delineate critical meteorological research issues related to the prediction of air quality." In this context, "prediction" is denoted as "forecasting" and includes the depiction and communication of the present chemical state of the atmosphere, extrapolation or nowcasting, and numerical prediction and chemical evolution on time scales up to several days. Emphasis is on the meteorological aspects of air quality. The problem of air quality forecasting is different in many ways from the problem of weather forecasting. The latter typically is focused on prediction of severe, adverse weather conditions, while the meteorology of adverse air quality conditions frequently is associated with benign weather. Boundary layer structure and wind direction are perhaps the two most poorly determined meteorological variables for regional air quality prediction. Meteorological observations are critical to effective air quality prediction, yet meteorological observing systems are designed to support prediction of severe weather, not the subtleties of adverse air quality. Three-dimensional meteorological and chemical observations and advanced data assimilation schemes are essential. In the same way, it is important to develop high-resolution and self-consistent databases for air quality modeling; these databases should include land use, vegetation, terrain elevation, and building morphology information, among others. New work in the area of chemically adaptive grids offers significant promise and should be pursued. The quantification and effective communication of forecast uncertainty are still in their early stages and are very important for decision makers; this also includes the visualization of air quality and meteorological observations and forecasts. Research is also needed to develop effective metrics for the evaluation and verification of air quality forecasts so that users can understand the strengths and weaknesses of various modeling schemes. Last, but not of least importance, is the need to consider the societal impacts of air quality forecasts and the needs that they impose on researchers to develop effective and useful products MH - Mexico|Distrito Federal MH - USA PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Meteorology & Atmospheric Sciences U5 - J;Review AV - English IS - 0003-0007 UR - ISI:000221162200027 L2 - SURFACE-HYDROLOGY MODEL; ADAPTIVE-GRID ALGORITHM; BOUNDARY-LAYER; URBAN AREAS; HETEROGENEOUS TERRAIN; ATMOSPHERIC MODELS; TROPOSPHERIC OZONE; INITIAL CONDITIONS; NITROGEN-FIXATION; FLUX MEASUREMENTS SO - Bulletin of the American Meteorological Society 2004 ;85(4):563-+ 10543 UI - 3850 AU - Daessle LW AU - Camacho-Ibar VF AU - Carriquiry JD AU - Ortiz-Hernandez MC AD - Univ Autonoma Baja California, Inst Invest Oceanol, Environm Geosci Res Grp, Ensenada 22800, Baja California, MexicoDaessle, LW, Univ Autonoma Baja California, Inst Invest Oceanol, Environm Geosci Res Grp, PMB133,Coronado 189003, Coronado, CA 92178 USA TI - The geochemistry and sources of metals and phosphorus in the recent sediments from the Northern Gulf of California AB - The impact of human interventions on water and sediment fluxes from the Colorado River into the Gulf of California is still poorly understood. The erosion of the deltaic structure and the adjacent tidal flats has caused the dispersion and re-deposition of metal-rich clayey mud along the Baja California coast and alternate sediment sources are thought to have gained importance. The sediments in the Northern Gulf of California (NGC) are studied geochemically in order to determine the probable sources and sinks of sediments, metals and phosphorus in the region. Four geochemical factors are identified in the NGC: terrigenous silts and clays, biogenic carbonates, barite and phosphate. Unlike other sediments in the NGC, the Colorado River-derived silts and clays (Fe less than or equal to 2.8%) are characterised by their high concentrations of labile inorganic-P (269 mug g(-1)); in these sediments similar to27% of the bulk concentrations of P is found in the exchangeable, Fe and Mn redox-sensitive and Al-oxihydroxide fractions. Apatite is the main P bearing fraction in the sediments, and except in one sample, organic-P is considered to be dominantly refractory. Localised, probably detrital, apatite and barite sources are identified directly adjacent to the Sonora coast. The anomalous enrichment of apatite in one sample with uncommonly high concentrations of labile (non-refractory) P suggests a probable authigenic mineralization in the eastern coast of the NGC. The high abundance of Ba in the Midriff Island region may indicate biogenic sources for this element there. Except for three samples from shallow carbonate bays and the deeper Delfin Basin, the sediments in the NGC contain > 90% of Al and Ba and > 70 % of Fe, Cu, Cr, Co, Zn and La in residual fractions. The chondrite normalised rare-earth element geochemistry is indicative of typical upper continental crust provenance of the sediments from the NGC. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography U5 - J;Article AV - English IS - 0278-4343 UR - ISI:000225183100006 L2 - Gulf of California;Colorado River;delta;marine sediments;geochemistry;metals;phosphorus;rare-earth elements;(112 degrees-115 degrees W and 28.5 degrees-32 degrees N);COLORADO RIVER DELTA; AMAZON RIVER; CIRCULATION; ELEMENTS; ACCUMULATION; SPECIATION; ESTUARY; FLUX; CLAY SO - Continental Shelf Research 2004 ;24(17):2093-2106 10544 UI - 6196 AU - Dagdug L AU - Berezhkovskii AM AU - Weiss GH AD - NIH, Ctr Informat Technol, Bethesda, MD 20892, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaDagdug, L, NIH, Ctr Informat Technol, Bldg 10, Bethesda, MD 20892, USA TI - Kinetics of ligand equilibration between tubular and vesicular parts of the endosome AB - The kinetics of ligand equilibration between the tubular and vesicular parts of the endosome are studied for ligands diffusing in the vesicle and in a narrow cylindrical tubule attached to it. The key quantity in our analysis is the fraction of ligands in the vesicle at time t, P-ves(t). We derive an expression for the Laplace transform of P-ves(t) as a function of the vesicle volume and the length and radius of the tubule as well as the ligand diffusion coefficients in the vesicle and in the tubule. This transform is used to find the average equilibration time as a function of the system parameters MH - Mexico|Distrito Federal MH - Russia MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000188946500062 L2 - ENDOCYTOSIS; CHANNEL SO - Physical Review e 2004 ;69(1): 10545 UI - 6330 AU - Damin A AU - Xamena FXL AU - Lamberti C AU - Civalleri B AU - Zicovich-Wilson CM AU - Zecchina A AD - Univ Turin, IFM, Dipartimento Chim, I-10125 Turin, ItalyUniv Turin, INFM, UdR Torino, I-10125 Turin, ItalyUniv Turin, INSTM, UdR Torino, I-10125 Turin, ItalyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoZecchina, A, Univ Turin, IFM, Dipartimento Chim, Via P Giuria 7, I-10125 Turin, Italy TI - Structural, electronic, and vibrational properties of the Ti-O-Ti quantum wires in the titanosilicate ETS-10 AB - The periodic ab initio CRYSTAL code approach has been adopted to perform for the first time the calculation of the vibrational frequencies of the titanosilicate ETS-10, modeled by one-dimensional periodic chains (including positive counterions). The cell parameter and the internal atomic coordinates of the models have been fully optimized at the Hartree-Fock (HF) level imposing a P2(1)/m11 symmetry. The so-obtained geometries well agree with the experimental data coming from single-crystal X-ray diffraction experiments. The HF and B3LYP band gaps (the latter evaluated at the HF geometry) are 14.03 and 5.22 eV, respectively. The analysis of the density of states at both HF and B3LYP levels shows that states coming from the apical oxygen atoms of the TiO6 octahedra are quite confined in a narrow range of energy. Frequencies have been calculated at HF level. The analysis of the obtained normal modes assigns the Raman "725" cm(-1) fingerprint of ETS-10 to a total-symmetric combination of the Ti-O bond stretching involving only the apical oxygen atoms. The analysis of the vibrational modes of fragments of increasing size indicates that, for this mode to be present, the chain of corner-sharing TiO6 Octahedra has to be confined in a siliceous matrix MH - Italy MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 25 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000188535700022 L2 - NANOWIRE BUILDING-BLOCKS; HARTREE-FOCK GRADIENTS; AB-INITIO; PERIODIC-SYSTEMS; FUNCTIONAL THEORY; MOLECULAR-SIEVE; TITANIUM; DENSITY; ZEOLITES; OPTIMIZATION SO - Journal of Physical Chemistry B 2004 ;108(4):1328-1336 10546 UI - 5117 AU - Darques M AU - Encinas A AU - Vila L AU - Piraux L AD - Univ Catholique Louvain, Unite Physicochim & Phys Mat, B-1340 Louvain, BelgiumUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78290, SLP, MexicoDarques, M, Univ Catholique Louvain, Unite Physicochim & Phys Mat, 1 Pl Croix Sud, B-1340 Louvain, Belgium TI - Tailoring of the c-axis orientation and magnetic anisotropy in electrodeposited Co nanowires AB - The magnetic properties of arrays of electrodeposited Co nanowires have been studied by ferromagnetic resonance as a function of the electrolytic bath acidity and the plating current intensity. It is observed that by adjusting the pH or the plating current it is possible to find appropriate electrolyte-deposition conditions which lead to the deposition of Co nanowires with a c-axis orientation either parallel or perpendicular to the wires. At relatively high plating currents, systems containing a dominant fraction of grains having the c-axis oriented perpendicular to the wires are favoured. Such wires show a significant decrease of the effective anisotropy due to the competition between the magnetocrystalline and the shape anisotropy that can be as low as 4.3 kOe. In contrast, at low plating currents the c-axis is aligned parallel to the wires and an effective anisotropy field, that can be as high as 12 kOe, is observed MH - Belgium MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000222194000031 L2 - COBALT NANOWIRES; MICROSTRUCTURE; PH; ALUMINA; FILMS SO - Journal of Physics-Condensed Matter 2004 ;16(22):S2279-S2286 10547 UI - 5250 AU - Darques M AU - Encinas A AU - Vila L AU - Piraux L AD - Catholic Univ Louvain, Unite Physicochim & Phys Mat, B-1340 Louvain, BelgiumUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78290, SLP, MexicoDarques, M, Catholic Univ Louvain, Unite Physicochim & Phys Mat, 1 Pl Croix Sud, B-1340 Louvain, Belgium TI - Controlled changes in the microstructure and magnetic anisotropy in arrays of electrodeposited Co nanowires induced by the solution pH AB - The effects of the electrolytic bath acidity, or pH, on the magnetic properties in arrays of electrodeposited Co nanowires and their correlation with the crystalline properties have been studied using ferromagnetic resonance. The results show that, depending on the value of the pH of the electrolyte, appreciable changes in the effective anisotropy can be induced. These changes are attributed to modifications in the microstructure of the Co nanowires. In particular, quantification of the effective anisotropy field shows that the microstructure of the deposited Co wires can be set to contain a dominant fraction of the Co-hcp phase with the c-axis oriented perpendicular to the wires, for pH values of 3.8-4.0, or parallel to the wires, for pH values greater than or equal to6.0. This results in a competitive or additive magnetocrystalline contribution to the total anisotropy field. Furthermore, at a pH value of 2.0, no contribution from the magnetocrystalline anisotropy is present, indicating a lack of texture in the Co microstructure. As a result, the effective anisotropy can be controlled over a field range of 5 kOe MH - Belgium MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 21 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000221897400002 L2 - EPITAXIAL COBALT FILMS; HCP PHASE-TRANSITION; NICKEL; MEMBRANE; ALUMINA SO - Journal of Physics D-Applied Physics 2004 ;37(10):1411-1416 10548 UI - 3629 AU - Darszon A AU - Wood CD AU - Beltran C AU - Sanchez D AU - Rodriguez E AU - Gorelik J AU - Korchev YE AU - Nishigaki T AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Cuernavaca, Morelos, MexicoUniv London Imperial Coll Sci Technol & Med, Div Med, MRC, Ctr Clin Sci, London W12 0NN, EnglandDarszon, A, Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Cuernavaca, Morelos, Mexico TI - Measuring lon fluxes in sperm MH - United Kingdom MH - Mexico|Morelos PB - SAN DIEGO: ELSEVIER ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Cell Biology U5 - S;Review AV - English IS - 0091-679X UR - ISI:000225592500022 L2 - SEA-URCHIN SPERM; EGG PEPTIDE SPERACT; INCREASED INTRACELLULAR PH; SINGLE-CHANNEL RECORDINGS; ACROSOME REACTION; PLASMA-MEMBRANE; ION-TRANSPORT; MOUSE SPERM; TRANSIENT HYPERPOLARIZATION; FURA-2 FLUORESCENCE SO - Development of Sea Urchins, Ascidians, and Other Invertebrate Deuterostomes: Experimental Approaches 2004 ;74():545-+ 10549 UI - 3522 AU - Das K AU - Sharma JR AU - Montoya L AD - Bot Survey India, Dehra Dun 248195, IndiaInst Ecol, Div Sistemat, Xalapa 91000, Veracruz, MexicoDas, K, Bot Survey India, 192 Kaulagarh Rd, Dehra Dun 248195, India TI - Lactarius in Kumaon Himalaya 3: A new species of subgenus Lactifluus AB - An undescribed Lactarius species in subgenus Lactifluus has been found in Kumaon, Himalaya. The combination of features with regard to basidiome and latex color, basidiospore form, and thick walled hymenial cystidioid elements distinguish this new species, L. capitatus, from its close relative, Lactarius luteolus of U.S.A. The basidiomes of the species described here were found growing under Quercus leucotrichophora in subtropical deciduous forests MH - India MH - Mexico|Veracruz PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 3 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000226154100006 L2 - macrofungi;Russulaceae;taxonomy;India;ectomycorrhizal fungi SO - Mycotaxon 2004 ;90(2):285-290 10550 UI - 4875 AU - Das K AU - Sharma JR AU - Montoya L AD - Bot Survey India, Dehra Dun 248195, IndiaInst Ecol, Xalapa 91000, Veracruz, MexicoDas, K, Bot Survey India, 192 Kaulagarh Rd, Dehra Dun 248195, India TI - Lactarius (Russulaceae) in Kumaon Himalaya. 1. New species of subgenus Russularia AB - Three new species of Lactarius (L. sanjappae, L. mukteswaricus and L. verbekenae) are described based on collections made in India. Illustrations of their macro- and microscopic features and data on their ecological distribution are presented MH - India MH - Mexico|Veracruz PB - YUNNAN: FUNGAL DIVERSITY PRESS RP - NOT IN FILE U3 - TC 6 U4 - Mycology U5 - J;Article AV - English IS - 1560-2745 UR - ISI:000222743900003 L2 - ectomycorrhiza;India;macrofungi;Russulales;taxonomy SO - Fungal Diversity 2004 ;16():23-33 10551 UI - 4616 AU - Das MK AU - Rajaram S AU - Mundt CC AU - Kronstad WE AD - Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331, USACIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoOregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331, USADas, MK, Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA TI - Number of genes controlling slow rusting resistance to leaf rust in five spring wheat cultivars AB - The number of genes controlling slow rusting resistance to leaf rust (Puccinia triticina) was estimated in five spring wheat (Triticum aestivum) cultivars using quantitative formulae. Parents and F 6 families were evaluated in replicated field trials under epidemics initiated by artificial inoculation. The F 6 families resulted from a diallel cross involving the fast-rusting cultivar Yecora 70 and five slow-rusting wheat cultivars: Sonoita 81, Tanager 'S', Galvez 87, Ures 81, and Moncho 'S'. The area under the disease progress curve (AUDPC) was used to measure leaf rust severity over time. Results indicate that cultivar Sonoita 81 has three or four genes, Tanager 'S' has two or three genes, Galvez 87 has three genes, and both Ures 81 and Moncho 'S' have two genes for slow rusting resistance to leaf rust. Based on this result and previously reported moderate to high narrow-sense heritability estimates for slow rusting resistance in these materials, early-generation selection for slow leaf rusting would be effective MH - Mexico|Distrito Federal MH - USA PB - WARWICK: ASSOC APPLIED BIOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0003-4746 UR - ISI:000223470300011 L2 - wheat;Puccinia triticina;Triticum aestivum;leaf rust;brown rust;slow rusting resistance;genetics;F-SP TRITICI; PUCCINIA-RECONDITA; INHERITANCE; COMPONENTS; GENETICS; GROWTH; WINTER SO - Annals of Applied Biology 2004 ;145(1):91-94 10552 UI - 4153 AU - Dautzenberg FM AU - Gutknecht E AU - Van der Linden I AU - Olivares-Reyes JA AU - Durrenberger F AU - Hauger RL AD - CNS Res, Johnson & Johnson Res & Dev, Beerse, BelgiumAxovan Ltd, CH-4123 Allschwil, SwitzerlandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Bioquim, Mexico City 07000, DF, MexicoUniv Calif San Diego, Dept Psychiat, VA Healthcare Syst, La Jolla, CA 92093, USADautzenberg, FM, CNS Res, Johnson & Johnson Res & Dev, Trunhoutsweg 30, Beerse, Belgium TI - Cell-type specific calcium signaling by corticotropin-releasing factor type 1 (CRF1) and 2a (CRF2(a)) receptors: phospholipase C-mediated responses in human embryonic kidney 293 but not SK-N-MC neuroblastoma cells AB - The human corticotropin-releasing factor (hCRF) receptors CRF1 and CRF2(a) couple to the G(s) protein. It has been postulated that CRF receptors may also signal through phospholipase C (PLC). To test this hypothesis, binding and signaling properties were determined for both receptor subtypes stably expressed in human embryonic kidney 293 (HEK293) and human SK-N-MC neuroblastoma cells. CRF receptors were highly expressed and strongly coupled to G(s) in HEK293 and SK-N-MC cells. However, when the calcium mobilization pathway was investigated, marked differences were observed. In SK-N-MC cells, neither CRF receptor stimulated calcium mobilization in the fluorometric imaging plate reader (FLIPR) assay, whereas activation of orexin type 1 and 2 receptors stably expressed in SK-N-MC cells revealed robust calcium responses. In contrast, intracellular calcium was strongly mobilized by agonist stimulation of hCRF(1) and hCR-F-2(a) receptors in HEK293 cells. In HEK293 cells, potency rank orders for calcium and cAMP responses were identical for both receptors, despite a rightward shift of the dose-response curves. Complete inhibition of calcium signaling of both hCRF(1) and hCRF(2(a)) receptors was observed in the presence of the PLC inhibitor U-73,122 whereas ryanodine, an inhibitor of calcium release channels and the protein kinase A inhibitor Rp-cAMPS were ineffective. Finally, CRF agonists produced a small but significant stimulation of inositol 1,4,5-triphosphate (IP3) accumulation in hCRF(1)-and hCRF(2(a))-transfected HEK293 cells. These data clearly show that phospholipase C-mediated signaling of CRF receptors is dependent upon the cellular background and that in HEK293 cells human CRF receptors robustly respond in the FLIPR format. (C) 2004 Elsevier Inc. All rights reserved MH - Belgium MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0006-2952 UR - ISI:000224443000016 L2 - ligand binding;cyclic AMP;Ca2(+) mobilization;phospholipase C;inositol 1,4,5-triphosphate;CRF receptor signaling;Y-79 RETINOBLASTOMA CELLS; PROTEIN-COUPLED RECEPTORS; SPLICE VARIANTS; ADENYLATE-CYCLASE; PHARMACOLOGICAL CHARACTERIZATION; LIGAND SELECTIVITY; PACAP RECEPTOR; XENOPUS-LAEVIS; KINASE-C; FAMILY SO - Biochemical Pharmacology 2004 ;68(9):1833-1844 10553 UI - 3694 AU - David GC AU - Carlos R AU - Katoh M AU - Jesus CM AD - Univ Nacl Autonoma Mexico, Dept Biol Celular & Fisiol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Inmunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoNatl Canc Ctr, Res Inst, Genet & Cell Biol Sect, Chuo Ku, Tokyo 1040045, Japan TI - Coordination of chondrocyte differentiation and joint formation by a5b1 integrin in the developing appendicular skeleton MH - Japan MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Developmental Biology U5 - J;Meeting Abstract AV - English IS - 0012-1606 UR - ISI:000222556200311 SO - Developmental Biology 2004 ;271(2):610-610 10554 UI - 4461 AU - Davis JI AU - Stevenson DW AU - Petersen G AU - Seberg O AU - Campbell LM AU - Freudenstein JV AU - Goldman DH AU - Hardy CR AU - Michelangeli FA AU - Simmons MP AU - Specht CD AU - Vergara-Silva F AU - Gandolfo M AD - Cornell Univ, LH Bailey Hortorium, Ithaca, NY 14853, USACornell Univ, Dept Plant Biol, Ithaca, NY 14853, USANew York Bot Garden, Inst Systemat Bot, Bronx, NY 10458, USAUniv Copenhagen, Inst Bot, DK-1123 Copenhagen, DenmarkOhio State Univ, Museum Biol Divers, Columbus, OH 43212, USAColorado State Univ, Dept Biol, Ft Collins, CO 80523, USAUNAM, Inst Ecol, Dept Ecol & Evolut, Mexico City 04510, DF, MexicoDavis, JI, Cornell Univ, LH Bailey Hortorium, Ithaca, NY 14853, USA TI - A Phylogeny of the monocots, as inferred from rbcL and atpA sequence variation, and a comparison of methods for calculating jackknife and bootstrap values AB - A phylogenetic analysis of the monocots was conducted on the basis of nucleotide sequence variation in two genes (atpA, encoded in the mitochondrial genome, and rbcL, encoded in the plastid genome). The taxon sample of 218 angiosperm terminals included 177 monocots and 41 dicots. Among the major results of the analysis are the resolution of a clade comprising four magnoliid lineages (Canellales, Piperales, Magnoliales, and Laurales) as sister of the monocots, with the deepest branch within the monocots between a clade consisting of Araceae, Tofieldiaceae, Acorus, and Alismatales, and a clade that includes all other monocots. Nartheciaceae are placed as the sister of Pandanales, and Corsiaceae as the sister of Liliales. The Triuridaceae, represented by three genera, including Lacandonia, are resolved as monophyletic and placed in a range of positions, generally within Pandanales. Dasypogonaceae and Arecaceae diverge sequentially from a clade that includes all other commelinid taxa, and within the latter group Poales s. lat. are sister of a clade in which Zingiberales and Commelinales are sisters. Within Poales s. lat., Trithuria (Hydatellaceae) and Mayaca appear to be closely related to some or all elements of Xyridaceae. A comparison was conducted of jackknife and bootstrap values, as computed using strict-consensus (SC) and frequency-within-replicates (FWR) approaches. Jackknife values tend to be higher than bootstrap values, and for each of these methods support values obtained with the FWR approach tend to exceed those obtained with the SC approach MH - Denmark MH - Mexico|Distrito Federal MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 23 U4 - Plant Sciences;Evolutionary Biology U5 - J;Review AV - English IS - 0363-6445 UR - ISI:000223702400001 L2 - LACANDONIA-SCHISMATICA LACANDONIACEAE; RESTRICTION SITE VARIATION; GRASS FAMILY POACEAE; CHLOROPLAST DNA; FLOWERING PLANTS; MOLECULAR-DATA; PLASTID DNA; NUCLEOTIDE-SEQUENCES; BASAL ANGIOSPERMS; SEED DEVELOPMENT SO - Systematic Botany 2004 ;29(3):467-510 10555 UI - 4773 AU - Dawson DA AU - Gorostiza LG AU - Wakolbinger A AD - Carleton Univ, Ottawa, ON K1S 5B6, CanadaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoUniv Frankfurt, D-6000 Frankfurt, GermanyDawson, DA, Carleton Univ, Ottawa, ON K1S 5B6, Canada TI - Hierarchical equilibria of branching populations AB - The objective of this paper is the study of the equilibrium behavior of a population on the hierarchical group Omega(N) consisting of families of individuals undergoing critical branching random walk and in addition these families also develop according to a critical branching process. Strong transience of the random walk guarantees existence of an equilibrium for this two-level branching system. In the limit N --> infinity (called the hierarchical mean (N) of field limit), the equilibrium aggregated populations in a nested sequence of balls B-l((N)) hierarchical radius l converge to a backward Markov chain on R+. This limiting Markov chain can be explicitly represented in terms of a cascade of subordinators which in turn makes possible a description of the genealogy of the population MH - Canada MH - Germany MH - Mexico|Distrito Federal PB - SEATTLE: UNIV WASHINGTON, DEPT MATHEMATICS RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1083-6489 UR - ISI:000223128100012 L2 - multilevel branching;hierarchical mean-field limit;strong transience;genealogy;GALTON-WATSON PROCESSES; LIMIT-THEOREMS; DIFFUSIONS SO - Electronic Journal of Probability 2004 ;9():316-381 10556 UI - 3526 AU - Dayou F AU - Bartolomei M AU - Campos-Martinez J AU - Hernandez MI AU - Hernandez-Lamoneda R AD - Consejo Super Invest Cient, Inst Matemat & Fis Fundamental, Madrid 28006, SpainUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoDayou, F, Consejo Super Invest Cient, Inst Matemat & Fis Fundamental, Serrano 123, Madrid 28006, Spain TI - On the role of the vibrational dependence of the intermolecular potential in O-2(nu)+O-2 collisions AB - The van der Waals intermolecular potential for the dimer O-2-O-2 is determined as a function of both intermolecular and bond coordinates from ab initio calculations for two selected orientations of the diatomic molecules. A recent empirical method based on correlation formulae between the polarizability of the diatoms and some potential features is also employed and extended to determine a model potential which incorporates the dependence on the bond coordinate. The main features of the ab initio and empirical potential energy surfaces are compared and discussed. Quantum scattering calculations of the vibrational relaxation of O-2(v) are performed by using both types of potentials for each selected geometry, providing evidence for the key role played by the representation of the vibrational dependence of the potential MH - Mexico|Morelos MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000225979200017 L2 - 2ND-ORDER PERTURBATION-THEORY; EXCITED OXYGEN MOLECULES; ENERGY-TRANSFER; O-2 MOLECULES; AB-INITIO; RELAXATION; SCATTERING; COEFFICIENTS; EXCHANGE; BOND SO - Molecular Physics 2004 ;102(21-22):2323-2334 10557 UI - 5442 AU - Dayou F AU - Campos-Martinez J AU - Hernandez MI AU - Hernandez-Lamoneda R AD - CSIC, Inst Matemat & Fis Fundamental, Madrid, SpainUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoDayou, F, CSIC, Inst Matemat & Fis Fundamental, Serrano 123, Madrid, Spain TI - Spin-orbit coupling in O-2(v)+O-2 collisions: A new energy transfer mechanism AB - A reduced dimensionality model is used to study the relaxation of highly vibrationally excited O-2(X (3)Sigma(g)(-),vgreater than or equal to20) in collisions with O-2(X (3)Sigma(g)(-),v=0). Spin-orbit coupled potential energy surfaces are employed to incorporate the vibrational-to-electronic energy transfer mechanism involving the O-2(a (1)Delta(g)) and O-2(b (1)Sigma(g)(+)) excited states. The transition probabilities obtained show a sharp increase for vgreater than or equal to26 providing the first direct evidence of the important role played by the electronic energy transfer processes in the depletion of O-2(X (3)Sigma(g)(-),vgreater than or equal to26). (C) 2004 American Institute of Physics MH - Mexico|Morelos MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 6 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000221538200001 L2 - 2ND-ORDER PERTURBATION-THEORY; INDUCED EMISSION; GAS-PHASE; OXYGEN; REACTIVITY SO - Journal of Chemical Physics 2004 ;120(22):10355-10358 10558 UI - 3815 AU - de-Bashan LE AU - Bashan Y AD - Ctr Biol Res NW CIB, Environm Microbiol Grp, La Paz 23000, MexicoUniv Laval, Dept Soil & Agrifood Engn, Fac Agr & Food Sci, Laval, PQ, CanadaBashan, Y, Ctr Biol Res NW CIB, Environm Microbiol Grp, POB 128, La Paz 23000, Mexico TI - Recent advances in removing phosphorus from wastewater and its future use as fertilizer (1997-2003) AB - Large quantities of phosphate present in wastewater is one of the main causes of eutrophication that negatively affects many natural water bodies, both fresh water and marine. It is desirable that water treatment facilities remove phosphorus from the wastewater before they are returned to the environment. Total removal or at least a significant reduction of phosphorus is obligatory, if not always fulfilled, in most countries. This comprehensive review summarizes the current status in phosphorus-removal technologies from the most common approaches, like metal precipitation, constructed wetland systems, adsorption by various microorganisms either in a free state or immobilized in polysaccharide gels, to enhanced biological phosphorus removal using activated sludge systems, and several innovative engineering solutions. As chemical precipitation renders the precipitates difficult, if not impossible, to recycle in an economical industrial manner, biological removal opens opportunities for recovering most of the phosphorus and beneficial applications of the product. This review includes the options of struvite (ammonium-magnesium-phosphate) and hydroxyapatite formation and other feasible options using, the now largely regarded contaminant, phosphorus in wastewater, as a raw material for the fertilizer industry. Besides updating our knowledge, this review critically evaluates the advantage and difficulties behind each treatment and indicates some of the most relevant open questions for future research. (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 39 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0043-1354 UR - ISI:000225194700021 L2 - enhanced biological phosphorus removal;phosphate-accumulating organisms;phosphate precipitation;phosphorus removal;struvite;water treatment;wetlands;BIOLOGICAL PHOSPHATE REMOVAL; SEQUENCING BATCH REACTOR; ACTIVATED-SLUDGE SYSTEMS; BACTERIUM AZOSPIRILLUM-BRASILENSE; MICROALGA CHLORELLA-VULGARIS; TARGETED OLIGONUCLEOTIDE PROBES; SOLE CARBON SOURCE; NUTRIENT REMOVAL; ACCUMULATING ORGANISMS; CALCIUM-PHOSPHATE SO - Water Research 2004 ;38(19):4222-4246 10559 UI - 5827 AU - de Anda J AU - Shear H AU - Maniak U AU - Valle PFZ AD - Ctr Invest & Asistencia Tecnol & Diseno Estado Ja, Guadalajara 44270, Jalisco, MexicoEnvironm Canada Ontario Reg, Toronto, ON M3H 5T4, CanadaTU Braunschweig, Leichtweiss Inst Wasserbau, Abt Hydrol & Wasserwirthschaft, D-38106 Braunschweig, GermanyUniv Guadalajara, CUCEI, Dept Quim, Guadalajara 44410, Jalisco, Mexicode Anda, J, Ctr Invest & Asistencia Tecnol & Diseno Estado Ja, AC Normalistas 800, Guadalajara 44270, Jalisco, Mexico TI - Solids distribution in Lake Chapala, Mexico AB - Lake Chapala is the largest natural water body in Mexico and also one of the most important shallow lakes in Latin America. For the past several years it has suffered various environmental problems such as the upstream overuse of water, contamination, and sedimentation. For the past 10 years the lake has had less than 50 percent of its historical water level over the past century, No criteria are reported in the literature that establish a water storage volume that will guarantee water quality conditions necessary for the survival of the lake. After determining the behavior of total solids concentrations in relation to the variations in the lake's depth, we proposed a minimum water column height of 5.0 m, representing a storage volume of about 5,000 Mm(3). This volume would result in the recommended water quality standards for total dissolved solids. Calculated distribution maps show that the total solids concentration in the lake has increased since the end of the 1970s. The solids are primarily concentrated in the eastern part of the lake, as a consequence of the high solids discharged from the Lerma River, its main tributary MH - Canada MH - Germany MH - Mexico|Jalisco PB - MIDDLEBURG: AMER WATER RESOURCES ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Environmental;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 1093-474X UR - ISI:000220590800009 L2 - Lake Chapala;sediment balance;sediment transport;solids;erosion;hydrologic balance;TURBIDITY; BALANCE SO - Journal of the American Water Resources Association 2004 ;40(1):97-109 10560 UI - 6065 AU - De Aza AH AU - Turrillas X AU - Rodriguez JL AU - Pena P AD - CSIC, Inst Ceram & Vidrio, Madrid, SpainCSIC, Inst Ciencias Construcc Eduardo Torroja, Madrid, SpainESRF, Grenoble, FranceIPN, CINVESTAV, Saltillo, Coahuila, MexicoDe Aza, AH, CSIC, Inst Ceram & Vidrio, Campus Cantoblanco, Madrid, Spain TI - Study of reaction sintering in dolomite based systems by neutron termodifractometry AB - Due to their adequate time-resolution, high temperature Powder Neutron Diffraction applied to reaction-sintering process allows in situ reaction analyses and transient phase identifications, which otherwise cannot be detected by quenching and conventional diffraction methods. Bearing in mind that dolomite MgCa(CO3)(2) is often used as a raw material in the synthesis of different refractory materials, in the present work, neutron diffraction time-resolved experiments were carried out during MgCa(CO3)(2) decomposition and the first steps of the reaction-sintering process of MgCa(CO3)(2)-Al2O3 and MgCa(CO3)(2)-ZrSiO4 mixtures. The results obtained up to 1300degrees C are presented and discussed to understand how these minerals behave during these first steps of the reaction sintering process. The activation energy for dolomite and calcite breakup was calculated from fitting to a contracting sphere model. Additionally, the dolomite mean thermal expansion coefficients were calculated along a and c axes from 25degrees to 700degrees C MH - France MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000220041900004 L2 - neutron diffractometry;dolomite;MgCa(CO3)(2);reaction sintering.;THERMODIFFRACTOMETRY SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(1):12-15 10561 UI - 4728 AU - De Becker A AU - Rauw G AU - Blomme R AU - Waldron WL AU - Sana H AU - Pittard JM AU - Eenens P AU - Stevens IR AU - Runacres MC AU - Van Loo S AU - Pollock AMT AD - Univ Liege, Inst Astrophys, B-4000 Liege, Sart Tilman, BelgiumObserv Royal Belgique, B-1180 Brussels, BelgiumL3 Commun Govt Serv Inc, Largo, MD 20774, USAUniv Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, EnglandUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, EnglandESA Vilspa, Madrid 28080, SpainDe Becker, A, Univ Liege, Inst Astrophys, Allee 6 Aout,Bat B5C, B-4000 Liege, Sart Tilman, Belgium TI - Quasi-simultaneous XMM-Newton and VLA observation of the non-thermal radio emitter HD 168112 (05.5III(f(+))) AB - We report the results of a multiwavelength study of the non-thermal radio emitter HD 168112 (O5.5III(f(+))). The detailed analysis of two quasi-simultaneous XMM-Newton and VLA observations reveals strong variability of this star both in the X-ray and radio ranges. The X-ray observations separated by five months reveal a decrease of the X-ray flux of similar to30%. The radio emission on the other hand increases by a factor 5-7 between the two observations obtained roughly simultaneously with the XMM-Newton pointings. The X-ray data reveal a hard emission that is most likely produced by a thermal plasma at kT similar to 2-3 keV while the VLA data confirm the non-thermal status of this star in the radio waveband. Comparison with archive X-ray and radio data confirms the variability of this source in both wavelength ranges over a yet ill defined time scale. The properties of HD 168112 in the X-ray and radio domain point towards a binary system with a significant eccentricity and an orbital period of a few years. However, our optical spectra reveal no significant changes of the star's radial velocity suggesting that if HD 168112 is indeed a binary, it must be seen under a fairly low inclination MH - Belgium MH - United Kingdom MH - Mexico|Guanajuato MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223249600030 L2 - radiation mechanisms : non-thermal;stars : early-type;X-rays : stars;radio continuum : stars;stars : individual : HD 168112;EARLY-TYPE STARS; O-TYPE STARS; COLLIDING STELLAR WINDS; RAYET SYSTEM HD-193793; LONG-TERM PHOTOMETRY; X-RAY; WOLF-RAYET; BINARY-SYSTEMS; SUBMILLIMETER OBSERVATIONS; MULTIFREQUENCY VARIATIONS SO - Astronomy & Astrophysics 2004 ;420(3):1061-1077 10562 UI - 3788 AU - de Cara M AU - Fernandez EJ AU - Blanco R AU - Marquina JCT AU - Estrada FJ AU - Montoya S AD - Univ Almeria, Dept Prod Vegetal, Almeria 04120, SpainUniv Autonoma Sinaloa, Fac Agron, Culiacan, Sinaloa, Mexicode Cara, M, Univ Almeria, Dept Prod Vegetal, La Canada San Urbano S-N, Almeria 04120, Spain TI - Detection of Fusarium oxysporum f sp melonis race 1 in soil in Colima State, Mexico MH - Mexico|Sinaloa MH - Spain PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;News Item AV - English IS - 0191-2917 UR - ISI:000225350500021 SO - Plant Disease 2004 ;88(12):1383-1383 10563 UI - 4200 AU - de Gregorio-Monsalvo I AU - Gomez JF AU - D'Alessio P AD - INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid, SpainUNAM, Inst Astron, Mexico City, DF, MexicoDe Gregorio-Monsalvo, I, INTA, Lab Astrofis Espacial & Fis Fundamental, Madrid, Spain TI - Molecular line emission from accretion disks around YSOs AB - In this work, we model the expected molecular emission from protoplanetary disks, modifying different physical parameters, such as dust grain size, mass accretion rate, viscosity, and disk radius, to obtain observational signatures in these sources. Having in mind possible future observations, we study correlations between physical parameters and observational characteristics. Our aim is to determine the kind of observations that will allow us to extract information about the physical parameters of disks. We also present prospects for molecular line observations of protoplanetary disks, using millimeter and submillimeter interferometers (e.g., SMA or ALMA), based on our results MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000224461300055 L2 - accretion disks-instrumentation;interferometers-methods;statistical-radiative transfer;YOUNG OBJECTS SO - Astrophysics and Space Science 2004 ;292(1-4):445-450 10564 UI - 6357 AU - de Gregorio-Monsalvo I AU - Gomez Y AU - Anglada G AU - Cesaroni R AU - Miranda LF AU - Gomez JF AU - Torrelles JM AD - Inst Nacl Tecn Aeroesp, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, SpainNatl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainOsserv Astrofis Arcetri, Ist Nazl Astrofis, I-50125 Florence, ItalyCSIC, IEEC, Inst Ciencias Espacio, E-08034 Barcelona, Spainde Gregorio-Monsalvo, I, Inst Nacl Tecn Aeroesp, Lab Astrofis Espacial & Fis Fundamental, Apartado 50727, E-28080 Madrid, Spain TI - A survey for water maser emission toward planetary nebulae: New detection in IRAS 17347-3139 AB - We report on a water maser survey toward a sample of 27 planetary nebulae (PNe) using the Robledo de Chavela and Medicina single-dish antennas, as well as the Very Large Array (VLA). Two detections have been obtained: the already known water maser emission in K3-35, and a new cluster of masers in IRAS 17347-3139. This low rate of detections is compatible with the short lifetime of water molecules in PNe (similar to100 yr). The water maser cluster at IRAS 17347-3139 are distributed on a ellipse of size similar or equal to0."2 x 0."1, spatially associated with compact 1.3 cm continuum emission ( simultaneously observed with the VLA). From archive VLA continuum data at 4.9, 8.4, and 14.9 GHz, a spectral index alpha = 0.76 +/- 0.03 (S-v proportional to v(alpha)) is derived for this radio source, which is consistent with either a partially optically thick ionized region or an ionized wind. However, the latter scenario can be ruled out by mass-loss considerations, thus indicating that this source is probably a young PN. The spatial distribution and the radial velocities of the water masers are suggestive of a rotating and expanding maser ring, tracing the innermost regions of a torus formed at the end of the asymptotic giant branch phase. Given that the 1.3 cm continuum emission peak is located near one of the tips of the major axis of the ellipse of masers, we speculate on a possible binary nature of IRAS 17347-3139, where the radio continuum emission could belong to one of the components and the water masers would be associated with a companion MH - Italy MH - Mexico|Michoacan MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188658100025 L2 - masers;planetary nebulae : general;planetary nebulae : individual (IRAS 17347-3139, K3-35);radio lines : ISM;LATE-TYPE STARS; CIRCUMSTELLAR ENVELOPES; PROTOPLANETARY NEBULAE; RADIO MORPHOLOGY; IRAS 16342-3814; OH/IR STARS; H2O MASERS; EVOLUTION; SPECTRUM; K-3-35 SO - Astrophysical Journal 2004 ;601(2):921-929 10565 UI - 3493 AU - De Koninck JM AU - Luca F AD - Univ Laval, Dept Math, St Foy, PQ G1K 7P4, CanadaUNAM, Inst Math, Morelia, Michoacan, MexicoDe Koninck, JM, Univ Laval, Dept Math, St Foy, PQ G1K 7P4, Canada TI - Proximity of powerful numbers MH - Canada MH - Mexico|Michoacan PB - WARSAW: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - French IS - 0065-1036 UR - ISI:000226248900004 SO - Acta Arithmetica 2004 ;114(2):149-157 10566 UI - 6316 AU - de la Cruz W AU - Soto G AU - Yubero F AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Sevilla, CSIC, Inst Ciencias Mat Sevilla, E-41092 Seville, Spainde la Cruz, W, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Beryllium nitride: an alternative material to beryllium for extreme ultraviolet and soft X-ray uses AB - Extreme ultraviolet and soft X-ray optical systems require low absorbing materials for many technological applications. In this paper, the optical properties of beryllium nitride (Be3N2) are studied and compared with those of beryllium (Be), a widely used material in this context. Thus, the dielectric function of Be and Be3N2 are determined in the 4-100 eV energy interval by means of reflection electron energy loss spectroscopy. It is found that the absorption coefficient of Be and Be3N2 are similar in the 40-100 eV energies range. Thereafter, the superior chemical stability and mechanical properties of Be3N2 makes it a promising Be substitute as optical material in severe environments. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000188534400007 L2 - EELS;dielectric function;beryllium nitride;beryllium;optical properties;QUANTITATIVE-ANALYSIS; THIN-FILM; SPECTRA; OPTICS SO - Optical Materials 2004 ;25(1):39-42 10567 UI - 3269 AU - de la Mora CR AU - Gershenson C AU - Garcia-Vega VA AD - Free Univ Brussels, Artificial Intelligence Lab, B-1050 Brussels, Belgium. Free Univ Brussels, CLEA, B-1160 Brussels, Belgium. Univ Veracruzana, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, Mexico TI - Representation development and behavior modifiers AB - We address the problem of the development of representations by an agent and its relationship to the environment. A software agent develops a representation of its environment through a network, which captures and integrates the relationships between agent and environment through a closure mechanism. A variable behavior modifier improves the representation development. We report the preliminary results where we analyze two aspects: 1) The structural properties of the resulting representation can be used as indicators of the knowledge assimilated by the agent from the interaction with the environment. These properties can be taken as useful macrovariables from an objective point of view; and 2) The dynamics of the closure mechanism, can be seen as the internal, and therefore subjective, way used by the system to develop its representation. We are not interested only on how the mechanism functions, but also on how the representation evolves MH - Belgium MH - Mexico|Veracruz T3 - ADVANCES IN ARTIFICIAL INTELLIGENCE - IBERAMIA 2004Lecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlecarlos@arti.vub.ac.be cgershen@vub.ac.be angegarcia@uv.mx1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBO40 AV - English IS - 0302-9743 UR - ISI:000226646200050 L2 - closure;representation development;behavior modifiers;affective states;biological motivations SO - 2004 ;():504-513 10568 UI - 4544 AU - de la Rosa DA AU - Volke-Sepulveda T AU - Solorzano G AU - Green C AU - Tordon R AU - Beauchamp S AD - CENICA, INE, Mexico City 09340, DF, MexicoEnvironm Canada, Dartmouth, NS B2Y 2N6, Canadade la Rosa, DA, CENICA, INE, Az San Rafael Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Survey of atmospheric total gaseous mercury in Mexico AB - While sources of gaseous mercury (natural and anthropogenic) are well known, studies on atmospheric mercury concentrations in Mexico are new. In order to assess the total gaseous mercury (TGM) levels at some characteristic Mexican sites, four locations were selected to start an exploratory survey and begin to asses the TGM behavior. This paper presents data obtained at an urban site (Mexico City), a rural site (Huejutla, Hidalgo), a coastline site (Puerto Angel, Oaxaca) and a closed mining site (Zacatecas City, Zacatecas). The highest TGM average values were found at this last site (71.82 ng m(-3)) together with the urban site (9.81 ng m(-3)). At the rural and coast line sites the lowest TGM values (1.32 and 1.46 ng m(-3), respectively) were found. According to the ANOVA test, there were significant differences for the TGM values among all the studied sites, except between the coastline and the rural place. A multiple correlation test performed between TGM and some meteorological parameters showed that in sites without anthropogenic mercury sources influence (rural and coast line), the TGM levels are correlated with the temperature and relative humidity, while for the other two sites no clear correlation was found. (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000223646300004 L2 - total gasec us mercury;mercury;meteorological parameters;Mexican polluted sites;ANTHROPOGENIC INFLUENCES; CANADA; VARIABILITY; DEPOSITION; SITES; AIR SO - Atmospheric Environment 2004 ;38(29):4839-4846 10569 UI - 5576 AU - de la Rosa G AU - Peralta-Videa JR AU - Montes M AU - Parsons JG AU - Cano-Aguilera I AU - Gardea-Torresdey JL AD - Univ Texas, El Paso, TX 79968, USAUniv Guanajuato, Fac Quim, Dept Ingn Quim, Guanajuato 36050, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAGardea-Torresdey, JL, Univ Texas, El Paso, TX 79968, USA TI - Cadmium uptake and translocation in tumbleweed (Salsola kali), a potential Cd-hyperaccumulator desert plant species: ICP/OES and XAS studies AB - Cadmium is a heavy metal, which, even at low concentrations, can be highly toxic to the growth and development of both plants and animals. Plant species vary extensively in their tolerance to excess cadmium in a growth medium and very few cadmium-tolerant species have been identified. In this study, tumbleweed plants (Salsola kali) grown in an agar-based medium with 20 mg l(-1) of Cd(II) did not show phytotoxicity, and their roots had the most biomass (4.5 mg) (P < 0.05) compared to the control plants (2.7 mg) as well as other treated plants. These plants accumulated 2696, 2075, and 2016 mg Cd kg(-1) of dry roots, stems, and leaves, respectively. The results suggest that there is no restricted cadmium movement in tumbleweed plants. In addition, the amount of Cd found in the dry leaf tissue suggests that tumbleweed could be considered as potential cadmium hyperaccumulating species. X-ray absorption spectroscopy studies demonstrated that in roots, cadmium was bound to oxygen while in stems and leaves, the metal was attached to oxygen and sulfur groups. This might imply that some small organic acids are responsible for Cd transport from roots to stems and leaves. In addition, it might be possible that the plant synthesizes phytochelatins in the stems, later coordinating the absorbed cadmium for transport and storage in cell structures. Thus, it is possible that in the leaves, Cd either exists as a Cd-phytochelatin complex or bound to cell wall structures. Current studies are being performed in order to elucidate the proposed hypothesis. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0045-6535 UR - ISI:000221212700002 L2 - Russian thistle;accumulation;X-ray absorption spectroscopy;RAY-ABSORPTION SPECTROSCOPY; HEAVY-METALS; INDIAN MUSTARD; ACCUMULATION; GROWTH; SOIL; L.; PHYTOREMEDIATION; TOXICITY; NICKEL SO - Chemosphere 2004 ;55(9):1159-1168 10570 UI - 5046 AU - De la Rosa MP AU - Texier S AU - Berhault G AU - Camacho A AU - Yacaman MJ AU - Mehta A AU - Fuentes S AU - Montoya JA AU - Murrieta F AU - Chianelli RR AD - Univ Texas, Mat Res Technol Inst, El Paso, TX 79968, USAUniv Poitiers, CNRS, UMR65O3, Catalyse Chim Organ Lab, F-86000 Poitiers, FranceUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Ctr Nano & Mat Sci & Technol, Austin, TX 78712, USAStanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025, USACtr Ciencias Mat Condensada, Ensenada 22830, Baja California, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoDe la Rosa, MP, Univ Texas, Mat Res Technol Inst, El Paso, TX 79968, USA TI - Structural studies of catalytically stabilized model and industrial-supported hydrodesulfurization catalysts AB - The high anisotropic character and inherent disorder in the structure Of Supported MoS2-based catalysts that are used extensively to perform hydrotreating reactions for the removal of heteroatoms (S, N, and 0), aromatics, and metals make characterization of the active catalyst a difficult challenge. XAS (X-ray absorption spectroscopy), XRD (X-ray diffraction), and HRTEM (high-resolution transmission electron microscopy) have been widely used in an attempt to understand the structure and origin of the active phase in these catalysts. However, phase and the associated Co promoter when used all these techniques have limitations in determining the structure of the active MoS-individually. Current techniques are notable to provide information of both lateral dimensions along the basal direction and of stacking height Of MoS2 slabs without ambiguity. We report here the use of a synchrotron source for X-ray-scattering measurements of supported MoS2) and C cobalt-promoted MoS2 catalysts. This synchrotron source strongly increases the signal to noise ratio resulting in the detection of diffraction features providing information on the dispersion of the active phase. Synchrotron X-ray measurements in combination with HRTEM can then give a more complete picture of catalyst structure and of the active phases present. Furthermore, supported industrial catalysts that have operated under refinery conditions for more than four years have been studied to better understand the stabilized catalytic phase under these conditions. Industrial hydrotreating conditions induce a "destacking" process resulting in the stabilization of single-layered MoS2-like nanoparticles. This effect has been confirmed On a freshly sulfided model CoMo/Al2O3 catalyst that underwent substantial morphological change leading to the formation of single slabs under HDS conditions. Other structural effects are also reported. This study emphasizes the importance of determining the catalytically stabilized phases under operating hydrotreating conditions as a basis for understanding the activity and selectivity of this class of catalysts. (C) 2004 Elsevier Inc. All rights reserved MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000222477800004 L2 - molybdenum sulfide;hydrodesulfurization;CoMo;stacking;morphology;X-ray scattering;RESOLUTION ELECTRON-MICROSCOPY; MOLYBDENUM SULFIDE CATALYSTS; HYDROTREATING CATALYSTS; PROMOTED MOS2; PHASE; HYDRODENITROGENATION; DEACTIVATION; MECHANISM; CARBON; CYCLE SO - Journal of Catalysis 2004 ;225(2):288-299 10571 UI - 1082 AU - de La Torre A AU - Hernandez-Rodriguez C AU - Garcia L AD - Univ Calif Davis, Chicana Studies Program, Davis, CA 95616, USAInst Tecnol & Estudios Super Monterrey, Grad Sch Management, Guadalajara, Jalisco, Mexicode La Torre, A, Univ Calif Davis, Chicana Studies Program, 2105 Hart Hall, Davis, CA 95616 USA TI - Cost analysis in telemedicine: Empirical evidence from sites in Arizona AB - Context: Support of telemedicine for largely rural and ethnically diverse populations is premised on expectations that it increases opportunities for appropriate and timely medical services, and that it improves cost-effective service delivery. Purpose: To understand the cost-effectiveness of telemedicine in 8 small and/or rural sites in Arizona. Methods: A cost analysis framework was used to measure the efficacy of telemedicine in the selected sites from May 1, 2000, to April 30, 2001. Findings: The costs for telemedicine services in half the study sites were more than the costs for conventional face-to-face diagnosis when the volume of telemedicine services used at a site was relatively low. This result persisted even when the opportunity cost for the patients in accessing more traditional types of care was included in the cost estimates. Conclusions: These preliminary findings suggest that telemedicine in some instances may not be cost-effective for providing medical specialists for underserved communities, particularly id these networks are underutilized by the patient population. Further analyses are needed to access factors influencing utilizing patterns of telemedicine servies by underserved and ethnic communities before implementing these programs at clinical sites MH - USA MH - Mexico|Jalisco PB - KANSAS CITY: NATL RURAL HEALTH ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Health Care Sciences & Services;Health Policy & Services;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0890-765X UR - ISI:000232016200009 SO - Journal of Rural Health 2004 ;20(3):253-257 10572 UI - 5205 AU - de la Vega RCR AU - Garcia BI AU - D'Ambrosio C AU - ego-Garcia E AU - Scaloni A AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoCNR, ISPAAM, Proteom & Mass Spect Lab, I-80147 Naples, ItalyPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Ave Univ 2001, Cuernavaca 62210, Morelos, Mexico TI - Antimicrobial peptide induction in the haemolymph of the Mexican scorpion Centruroides limpidus limpidus in response to septic injury AB - Antimicrobial peptides (AMPs) are essential components of host defences against infectious microrganisms. In chelicerate organisms they have been implicated in three alternative defensive systems: one is defined by the immediate up-regulation of genes encoding AMPs, another is characterized by the inducible systemic release of AMPs from cellular reservoirs and the third alternative is the systemic constitutive production of AMPs. In this work we used a differential high-performance liquid chromatography and mass spectrometry approach to show that septic injury elicits an immune response in the haemolymph of the Mexican scorpion Centruroides limpidus limpidus. We isolated several haemolymph components, one of which was characterized extensively (amino acid sequence, disulphide pairing, cDNA and genomic clones) and demonstrated to be a novel member of the invertebrate defensin family and consequently named C. limpidus limpidus defensin-like peptide (Cll-dlp). This peptide accumulates in the haemolymph in response to septic injury, independently of transcriptional regulation MH - Italy MH - Mexico|Morelos PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1420-682X UR - ISI:000222024300008 L2 - antimicrobial peptide;cysteine-stabilized alpha/beta motif;defensin;haemolymph;innate immunity;scorpion;NEMATODE ASCARIS-SUUM; INNATE IMMUNITY; ANTIBACTERIAL PEPTIDE; ACANTHOSCURRIA-GOMESIANA; ORNITHODOROS-MOUBATA; MOLECULAR-CLONING; INSECT DEFENSIN; SOFT TICK; EXPRESSION; ASABF SO - Cellular and Molecular Life Sciences 2004 ;61(12):1507-1519 10573 UI - 6089 AU - de Leon-Gonzalez JA AU - Rivera CG AU - Romero MY AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Biosistemat, San Nicolas De Los Garza 66451, NL, MexicoUniv El Salvador, Fac Ciencias Nat & Matemat, Escuela Biol, San Salvador, El Salvadorde Leon-Gonzalez, JA, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Biosistemat, Ap Postal 5 F, San Nicolas De Los Garza 66451, NL, Mexico TI - Sublittoral Eunicidae and Onuphidae (Polychaeta) from soft bottom off El Salvador, eastern Pacific AB - four new species belonging to the families Eunicidae and Onuphidae arc described oil the basis of specimens Collected from El Salvador, Central America. Addition L I I V ten species belonging to Onuphidae M-C mentioned, nine of these arc newly reported from El Salvador. Eunice chicasi sp. nov., belong to the group of species with acicula distally hammer head, peristomial cirri smooth only reaching middle peristomium, branchiae from chaetiger 5 to the end of, body, with up to six filaments, falcigers with lateral tooth triangular, well developed. Eunice salvadorensis sp. nov. has moniliform and cylindrical articles ill the antennae, peristomial cirri with 17 small moniliform articles. Kinbergonuphis kristiani sp. nov. presents up to tell branchial filaments, ventral cirri digitiform oil the first seven chaetigers, pseudocompound hooks tridentate appear oil chaetigers 1-5, large tridentate hooks oil chaetigers 5-7., and subacicular hooks from chaetiger 19. Paradiopatra barrazai sp. nov. belongs to the group of species with inner lateral antennae longer than the median antennae, ceratophores with four rings, ventral cirri of chaetigers 1-2 cirriform., postchactal lobe digitate, visible to the end of,the body, tridentate pseudocompound hooks oil chaetigers 1-4,, large tridentate hook on chaetigers 5-28, subacicular hooks from chaetiger 30 MH - El Salvador MH - Mexico|Nuevo Leon PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000189309300013 SO - Journal of the Marine Biological Association of the United Kingdom 2004 ;84(1):93-101 10574 UI - 4315 AU - de Los Angeles Herrera-Campos AU - Lucking R AU - Perez RE AU - Campos A AU - Colin PM AU - Pena AB AD - Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoField Museum Nat Hist, Dept Bot, Chicago, IL 60605, USAUAEM, Fac Ciencias Biol, Cuernavaca 62210, Morelos, Mexicode Los Angeles Herrera-Campos, M, Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Apdo Postal 70-233, Mexico City 04510, DF, Mexico TI - The foliicolous lichen flora of Mexico. V. Biogeographical affinities, altitudinal preferences, and an updated checklist of 293 species AB - An inventory of foliicolous lichens in Mexican lowland and montane rainforest revealed a total of 288 species, 238 of which are new records for the country, raising the number of reported lichen species to c. 1800. Among the new records, there are 29 recently described species and four new records for the Neotropics and the Americas, while five taxa are for the first time reported for Central America. The 293 species now known from Mexico comprise nearly two-thirds pantropical to cosmopolitan or intercontinentally distributed taxa, whereas little more than one-third are Neotropical or American, and only 6% are potentially endemic to the country. A comparison with other lowland and montane rainforest sites in Guatemala, Costa Rica and Ecuador shows that on average lowland sites have twice as many species as montane sites. Also, the differentiation in species composition between lowland and montane sites within the same region is more pronounced (63-75% similarity) than that between adjacent regions (96-99% similarity for lowland sites and 83-87% similarity for montane sites). This means that altitudinal preferences affect species composition more strongly than geographical differentiation. The latter is a function of distance, however, while Mexican and Guatemalan lowland (montane) sites share 96% (83%) of the species, these values drop to 74% (72%) when comparing Mexico with Ecuador. Nevertheless, overall floristic similarity is very high, with the lowest value of 54% shared species found between Mexican lowland and Costa Rican montane forest MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Mycology U5 - J;Article AV - English IS - 0024-2829 UR - ISI:000224097600005 L2 - altitudinal preferences;Costa Rica;diversity;foliicolous lichens;Ecuador;Guatemala;Mexico;SELVA BIOLOGICAL STATION; COSTA-RICA; NEOTROPICS SO - Lichenologist 2004 ;36():309-327 10575 UI - 6175 AU - De Luna CJ AU - Rosales-Hoz L AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoDe Luna, CJ, Univ Durham, Sch Biol & Biomed Sci, Sci Labs, South Rd, Durham DH1 3LE, England TI - Heavy metals in tissues of gray whales Eschrichtius robustus, and in sediments of Ojo de Liebre Lagoon in Mexico MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000189178400004 L2 - CHEMICAL CONTAMINANTS; BAJA-CALIFORNIA; COAST; PENINSULA; PORPOISE; PACIFIC SO - Bulletin of Environmental Contamination and Toxicology 2004 ;72(3):460-466 10576 UI - 6000 AU - De Mejia EG AU - Ramirez-Mares MV AU - rce-Popoca E AU - Wallig M AU - Villa-Trevino S AD - Univ Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801, USAIPN, CINVESTAV, Res Ctr Adv Studies, Mexico City, DF, MexicoUniv Illinois, Dept Vet Pathobiol, Urbana, IL, USAde Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 228 ERML,M-C 051,1201 W Gregory Dr, Urbana, IL 61801 USA TI - Inhibition of liver carcinogenesis in Wistar rats by consumption of an aqueous extract from leaves of Ardisia compressa AB - This study evaluates the chemopreventive effect of an aqueous extract of dried leaves of Ardisia compressa against liver cancer. A rat liver assay that mimics progressive forms of human disease was used as a carcinogenesis model. Forty-five male Wistar rats (180-200 g body weight) were injected intraperitoneally on day 1 with a single dose (100 mg/kg) of diethylnitrosamine (DEN), and also received via gavage 20 mg/kg acetylaminofluorene (2-AAF), on days 7, 8 and 9. The rats were randomly divided into four groups (n = 15). Control groups (Group I and Group 2) had free access to water. Group 3 received 0.5% (w/v) of A. compressa tea for 10 days before treatment and during the study as the sole source of fluid until the rats were killed. A fourth group of 15 rats received no carcinogen or promoter but did receive 0.5%, (w/v) of A. compressa tea. All animals had 70% partial hepatectomy at day 10. The incidences of hepatocellular foci, nodules and carcinoma were significantly smaller in Group 3 than in Group 2 (P < 0.01). A. compressa tea consumption alone (Group 4) did not induce the development of foci, nodules or carcinomas (P < 0.01). The striking observation of this study was that consumption of A. compressa tea resulted in complete inhibition of the chemically-induced hepatocarcinogenesis in Wistar rats. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Food Science & Technology;Toxicology U5 - J;Article AV - English IS - 0278-6915 UR - ISI:000220164800020 L2 - Ardisia compressa;chemoprevention;liver cancer;apoptosis;GLUTATHIONE-S-TRANSFERASE; GREEN TEA POLYPHENOLS; PLACENTAL FORM; CANCER; CELLS; CHEMOPREVENTION; HEPATOCYTES; GROWTH; HEPATOCARCINOGENESIS; APOPTOSIS SO - Food and Chemical Toxicology 2004 ;42(3):509-516 10577 UI - 4719 AU - de Miranda FP AU - Marmol AMQ AU - Pedroso EC AU - Beisl CH AU - Welgan P AU - Morales LM AD - Petrobras SA, Ctr Res & Dev, CENPES, BR-21491598 Rio De Janeiro, BrazilPEMEX Explorac & Prod, Reg Marina NE, Cd Del Carmen 24130, Campeche, MexicoUniv Fed Rio de Janeiro, Resource Ctr Brazil, CBRR, COPPE,Ctr Tecnol, BR-21949900 Rio De Janeiro, BrazilRADARSAT Int Inc, Richmond, BC V6V 2J3, Canadade Miranda, FP, Petrobras SA, Ctr Res & Dev, CENPES, Ave 1,Quadra 7,Ciudade Univ, BR-21491598 Rio De Janeiro, Brazil TI - Analysis of RADARSAT-1 data for offshore monitoring activities in the Cantarell Complex, Gulf of Mexico, using the unsupervised semivariogram textural classifier (USTC) AB - Understanding the temporal dynamics and spatial distribution of natural seepage phenomena in the Gulf of Mexico is fundamental for the definition of proper environmental management practices in this often cloud-covered region. RADARSAT-1 images analyzed in this paper were acquired using the wide I and wide 2 (W1, W2) and ScanSAR narrow I (SCN1) beam modes. Image processing was carried out using the unsupervised semivariogram textural classifier (USTC). In combination with RADARSAT-1 satellite images, and essential ancillary data, this technology enhances the detection of seepage slicks on the ocean surface based on radar texture. USTC classification of RADARSAT-1 data provided systematic evidence from space of the presence of prolific, present-day petroleum generation and migration in the Cantarell Complex of oil fields MH - Brazil MH - Canada MH - Mexico|Campeche PB - OTTAWA: CANADIAN AERONAUTICS SPACE INST RP - NOT IN FILE U3 - TC 0 U4 - Remote Sensing U5 - J;Article AV - English IS - 0703-8992 UR - ISI:000223256100020 L2 - FUYO-1 SAR DATA; VEGETATION DISCRIMINATION; OIL-SPILLS; STC SO - Canadian Journal of Remote Sensing 2004 ;30(3):424-436 10578 UI - 6106 AU - de Monvel AB AU - Naboko S AU - Silva LO AD - Univ Paris 07, Math Inst, F-75251 Paris, FranceSt Petersburg State Univ, Inst Phys, Dept Higher Math & Math Phys, St Petersburg 198904, RussiaUniv Nacl Autonoma Mexico, IIMAS, Dept Math & Numer Methods, Mexico City 01000, DF, Mexicode Monvel, AB, Univ Paris 07, Math Inst, Case 7012,2,Pl Jussieu, F-75251 Paris, France TI - Eigenvalue asymptotics of a modified Jaynes-Cummings model with periodic modulations AB - We analyze the influence of additive and multiplicative periodic modulations on the asymptotic behavior of eigenvalues of some Hermitian Jacobi Matrices related to the Jaynes-Cummings model using the so-called "successive diagonalization" method. This approach allows us to find, the asymptotics of the nth eigenvalue lambda(n) as n --> infinity stepwise with successively increasing precision. We bring to light the interplay of additive and multiplicative periodic modulations and their influence on the asymptotic behavior of eigenvalues. (C) 2003 Academie des sciences. Published by Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Russia PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 1631-073X UR - ISI:000189282300021 SO - Comptes Rendus Mathematique 2004 ;338(1):103-107 10579 UI - 6557 AU - de Pablo L AU - Chavez ML AU - Sum AK AU - de Pablo JJ AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USAde Pablo, L, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Monte Carlo molecular simulation of the hydration of Na-montmorillonite at reservoir conditions AB - The hydration of Na-saturated Wyoming-type montmorillonite is investigated by Monte Carlo simulations at constant stress in the NPzzT ensemble and at constant chemical potential in the muVT ensemble, at the sedimentary basin temperature of 353 K and pressure of 625 bar, equivalent to 2-4 km depth. The simulations use procedures established in Chavez-Paez [J. Chem. Phys. 114, 1405 (2001)]. At these conditions, simulations predict a single stable form of 1,2-water layer Na-montmorillonite, containing 164.38 mg/g or 53.37 molecules/layer of adsorbed water and having a spacing of 12.72 Angstrom. The corresponding density is 0.32 g/ml. Sodium ions are coordinated with six molecules of water separated 2.30-2.33 A. Water molecules are closer to the central interlayer plane and the spacing is larger than that at 300 K and 1 bar. The interlayer configuration consists of two symmetrical layers of oriented water molecules 1.038 Angstrom from the central plane, with the hydrogen atoms in two outermost layers, 3.826 Angstrom apart, and the sodium ions on the central plane located between the water layers. The interlayer configuration can be considered to be a stable two-layer intermediate between the one- and two-layer hydrates. Our simulations do not predict formation of other hydrates of Na-montmorillonite at 353 K and 615 bar. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 13 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000187718200046 L2 - SWELLING CLAY-MINERALS; COMPUTER-SIMULATION; INTERLAYER WATER; ELEVATED PRESSURES; SODIUM; TEMPERATURES; DEHYDRATION; SMECTITE; DESORPTION; HYSTERESIS SO - Journal of Chemical Physics 2004 ;120(2):939-946 10580 UI - 3859 AU - de Parrodi CA AU - Walsh PJ AD - Univ Penn, Dept Chem, P Roy & Diana T Vagelos Labs, Philadelphia, PA 19104, USAUniv Amer Puebla, Dept Quim & Biol, Puebla 72820, MexicoWalsh, PJ, Univ Penn, Dept Chem, P Roy & Diana T Vagelos Labs, Philadelphia, PA 19104 USA TI - trans-1,2-diaminocyclopentane-based catalyst for the asymmetric addition of alkyl-, aryl-, and vinyl groups to ketones AB - The catalytic asymmetric addition of ethyl-, phenyl-, and 1-hexenyl groups to ketones is reported. The new catalyst, generated from titanium isopropoxide and a bis(sulfonamide) diol ligand based on trans-1,2-diaminocyclopentane, gives good to excellent enantioselectivities with a range of substrates MH - Mexico|Puebla MH - USA PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0936-5214 UR - ISI:000225092300040 L2 - alcohols;asymmetric catalysis;ketones;quaternary centers;ligands;REAGENTS; STEREOCENTERS SO - Synlett 2004 ;(13):2417-2420 10581 UI - 6467 AU - De Pree CG AU - Wilner DJ AU - Mercer AJ AU - Davis LE AU - Goss WM AU - Kurtz S AD - Agnes Scott Coll, Dept Phys & Astron, Decatur, GA 30030, USACtr Astrophys, Cambridge, MA 02138, USANatl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoDe Pree, CG, Agnes Scott Coll, Dept Phys & Astron, 141 E Coll Ave, Decatur, GA 30030 USA TI - Broad recombination line objects in W49 North on 600 AU scales AB - We present 7 mm observations of the W49 North (W49N) massive star forming region, made with the Very Large Array, that detect recombination line emission from individual ultracompact H II regions on 50 mas (600 AU) scales. These recombination line observations, together with multifrequency continuum imaging, indicate that 5 - 7 of the 18 ultracompact H II regions in the region are broad recombination line objects (BRLOs) as described by Jaffe & Martin-Pintado (1999). These BRLOs have both broad radio recombination lines (DeltaV > 60 km s(-1)) and rising radio spectra (S-nu proportional to nu(alpha)) with alpha > 0.4. The broad linewidths of the H52alpha lines at 7 mm are not likely due to pressure broadening, but instead to systematic motions of the ionized gas. A variety of models have been proposed to explain the long lifetimes of ultracompact H II regions, including the photoevaporated disk model of Hollenbach et al. ( 1994). This model at least qualitatively explains many features of some of the ultracompact H II regions observed at high resolution, including the broad recombination lines, rising spectra, and bipolar morphologies. We suggest that we may be observing the signatures of ionized winds from circumstellar disks in a subset of the W49N ultracompact sources MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188205600024 L2 - HII regions;ISM : individual (W49A);ISM : kinematics and dynamics;line : profiles;radio lines : ISM;stars : formation;H-II REGIONS; ULTRACOMPACT HII-REGIONS; IONIZED-GAS; EVOLUTION; STARS; WINDS SO - Astrophysical Journal 2004 ;600(1):286-291 10582 UI - 5207 AU - de Rincon OT AU - Castro P AU - Moreno EI AU - Torres-Acosta AA AU - de Bravo OM AU - Arrieta I AU - Garcia C AU - Garcia D AU - Martinez-Madrid M AD - La Univ Zulia, Ctr Estudios Corros, Maracaibo, VenezuelaIPN, Unidad Merida, Ctr Invest & Estudios Avanzados, Merida, Yucatan, MexicoUniv Autonoma Yucatan, Fac Ingn, Merida, Yucatan, MexicoInst Mexicano Transporte, Sanfandila, Queretaro, Mexicode Rincon, OT, La Univ Zulia, Ctr Estudios Corros, Maracaibo, Venezuela TI - Chloride profiles in two marine structures-meaning and some predictions AB - Interpretations of chloride profiles as well as prediction issues have been two of the more interesting topics when investigating corrosion of concrete structures. Chloride profiles from the oldest concrete pier with stainless steel as reinforcement (Progreso, Mexico) as well as the oldest pretensioned bridge (Maracaibo, Venezuela) have been measured in order to compare penetration mechanisms and to predict future behavior of the whole structures. Some of the results seem to indicate that the penetration mechanism is similar independently of the exposure environment and concrete quality. Besides, these results are compared with a newer construction (a bridge built 17 years ago in USA but exposed to a similar environment as the Progreso pier). The results are discussed in terms of concrete quality, internal amount of chlorides (time of exposure) and environmental variables. Some predictions for maintenance were performed based on the reported chloride thresholds for corrosion onset of black steel and 304 stainless steel. The predictions for both structures were in agreement with the physical and electrochemical evidences, indicating the need of immediate maintenance to avoid further deterioration. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Queretaro MH - Mexico|Yucatan MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Construction & Building Technology;Engineering, Environmental;Engineering, Civil U5 - J;Article AV - English IS - 0360-1323 UR - ISI:000222127100007 L2 - concrete structures;corrosion;chloride profiles;modeling;CONCRETE; PERFORMANCE SO - Building and Environment 2004 ;39(9):1065-1070 10583 UI - 5183 AU - de Roodt AR AU - Paniagua-Solis JF AU - Dolab JA AU - Estevez-Ramirez J AU - Ramos-Cerrillo B AU - Litwin S AU - Dokmetjian JC AU - Alagon A AD - Inst Nacl Prod Biol ANLIS Dr Carlos G Malbran, Area Invest & Desarrollo Serpentario, Dept Vacunas & Sueros, RA-1281 Buenos Aires, DF, ArgentinaLab Silanes SA de CV, Direcc Invest & Desarrollo, Mexico City, DF, MexicoInst Bioclon, Lab Invest & Desarrollo, Mexico City, DF, MexicoUNAM, Inst Biotechnol, Dept Med Mol & Bioproc, Cuernavaca, Morelos, Mexicode Roodt, AR, Inst Nacl Prod Biol ANLIS Dr Carlos G Malbran, Area Invest & Desarrollo Serpentario, Dept Vacunas & Sueros, Av Velez Sarsfield 563, RA-1281 Buenos Aires, DF, Argentina TI - Effectiveness of two common antivenoms for North, Central, and South American Micrurus envenomations AB - Micrurus snakes (coral snakes) may produce severe envenomation that can lead to death by peripheral respiratory paralysis. Only few laboratories produce specific antivenoms, and despite the cross-reactivity found in some Micrurus species venoms, the treatment is not always effective. To test two therapeutic antivenoms against the venom of four species of Micrurus from Southern America, North of South America, Central America, and North America, the determination of the lethal potency of the venoms, the study of some biochemical and immunochemical characteristics, and the determination of the neutralizing activity of both antivenoms were studied. North American and South American antivenoms neutralized well venoms from Micrurus species of the corresponding hemisphere but displayed lower effectiveness against venoms of species from different hemispheres. It was concluded that the neutralization of Micrurus venoms by regional antivenoms could be useful to treat the envenomation by some Micrurus snakes but is necessary to evaluate carefully the antivenoms to be used with the venoms from the snakes of the region. Also, considering the difficulties for coral snake antivenom production, the development of a polyvalent antivenom is useful to treat the envenomation by coral snakes from different regions is necessary MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Toxicology U5 - J;Article AV - English IS - 0731-3810 UR - ISI:000222009700007 L2 - Micrurus;antivenoms;venoms;severe envenomation;snakes;therapeutics;SNAKE-VENOMS; NIGROCINCTUS-NIGROCINCTUS; IMMUNOCHEMICAL CHARACTERIZATION; CROSS-REACTIVITY; MANAGEMENT; ABILITY; BITES; A(2); SERA SO - Journal of Toxicology-Clinical Toxicology 2004 ;42(2):171-178 10584 UI - 4111 AU - de Silva HG AU - Marantz CA AU - Perez-Villafana M AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Massachusetts, Dept Biol, Amherst, MA 01003, USAde Silva, HG, Xola 314-E, Mexico City 03100, DF, Mexico TI - Song in female Hylorchilus wrens AB - We report on the discovery of a distinct female song in Nava's Wren (Hylorchilus navai), similar to that recently discovered in Sumichrast's Wren (Hylorchilus sumichrasti). In both species, females sometimes countersing with males but do not combine their songs into a synchronized duet as in many other tropical wrens. We provide observations that suggest territorial defense, intra-pair contact, and perhaps mate-guarding as possible functions of female song in Hylorchilus, a little-known genus endemic to Mexico MH - Mexico|Distrito Federal MH - USA PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000224499200014 L2 - SUMICHRASTS WREN SO - Wilson Bulletin 2004 ;116(2):186-188 10585 UI - 6287 AU - De Trez C AU - Brait M AU - Leo O AU - Aebischer T AU - Torrentera FA AU - Cartier Y AU - Muraille E AD - Free Univ Brussels, IBMM, Physiol Anim Lab, Gosselies, BelgiumFree Univ Brussels, Parasitol Lab, Erasme, BelgiumMax Planck Inst Infect Biol, Dept Biol Mol, Berlin, GermanyInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Immunol, Mexico City, DF, MexicoCartier, Y, Free Univ Brussels, Fac Med, Parasitol Lab, CP616,Route Lennik 808, B-1070 Brussels, Belgium TI - Myd88-dependent in vivo maturation of splenic dendritic cells induced by Leishmania donovani and other leishmania species AB - The usual agent of visceral leishmaniasis in the Old World is Leishmania donovani, which typically produces systemic diseases in humans and mice. L. donovani has developed efficient strategies to infect and persist in macrophages from spleen and liver. Dendritic cells (DC) are sentinels of the immune system. Following recognition of evolutionary conserved microbial products, DC undergo a maturation process and activate antigen-specific naive T cells. In the present report we provide new insights into how DC detect Leishmania in vivo. We demonstrate that in both C57BL/6 and BALB/c mice, systemic injection of L. donovani induced the migration of splenic DC from marginal zones, to T-cell areas. During migration, DC upregulated the expression of major histocompatibility complex II and costimulatory receptors (such as CD40, CD80, and CD86). Leishmania-induced maturation requires live parasites and is not restricted to L. donovani, as L. braziliensis, L. major, and L. mexicana induced a similar process. Using a green fluorescent protein-expressing parasite, we demonstrate that DC undergoing maturation in vivo display no parasite internalization. We also show that L. donovani-induced DC maturation was partially abolished in MyD88-deficient mice. Taken together, our data suggest that Leishmania-induced DC maturation results from direct recognition of Leishmania by DC, and not from DC infection, and that MyD88-dependent receptors are implicated in this process MH - Belgium MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000188766400026 L2 - VISCERAL LEISHMANIASIS; T-CELLS; CUTANEOUS LEISHMANIASIS; LYMPHOID ORGANS; ANTIGEN; IMMUNITY; MICE; ACTIVATION; INFECTION; VACCINATION SO - Infection and Immunity 2004 ;72(2):824-832 10586 UI - 5374 AU - de Velasco GG AU - Winant CD AD - Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093, USACtr Invest Cient & Educ Super Ensenada, Unidad La Paz, La Paz, MexicoWinant, CD, Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, 9500 Gilman Dr, La Jolla, CA 92093 USA TI - Wind- and density-driven circulation in a well-mixed inverse estuary AB - Near the ocean, the residual circulation in Laguna San Ignacio, located on the Pacific coast of Baja California in Mexico, has been shown to be driven by tides. Here the subtidal circulation in the portion of the lagoon farther from the ocean is shown to be driven by the wind. The pressure difference between two stations, one near the closed end and the other midway along the central axis, is correlated well with the wind stress, in the sense that sea level rises downwind. Where the bathymetry is relatively simple, with a deep channel separating two shoal areas, the flow is upwind at the deepest part of the section, driven by the axial pressure gradient. In areas where the bathymetry is more complex, the direction of the observed flow is parallel neither to the local bathymetry nor to the applied wind stress. Linear theory qualitatively explains the major features of the wind-driven flow, including the relative strength of the pressure gradient to the wind stress, the direction of the flow, and the vertical structure, even in topographically complex areas. The residual circulation, after the wind-driven component has been removed, is assumed to be driven by the salinity gradient. That flow changes direction with depth. Where the bathymetry is simple, the near-bottom flow is toward relatively fresh water; flow is in the opposite direction closer to the surface. A linear model driven by a prescribed horizontal density gradient predicts downgradient flow at all depths near the deepest point of any section - a prediction that is qualitatively different from the observed flow MH - USA MH - Mexico|Baja California Sur PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Oceanography U5 - J;Article AV - English IS - 0022-3670 UR - ISI:000221606700008 SO - Journal of Physical Oceanography 2004 ;34(5):1103-1116 10587 UI - 4409 AU - Deas M AU - Bautista C AU - Martinez-Samayoa P AU - Nathanielsz PW AU - Zambrano E AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoNYU, Sch Med, Ctr Womens Hlth Res, New York, NY, USA TI - Protein restriction in pregnancy and lactation cause long-term changes in food intake, body weight and serum leptin in female rat progeny MH - Mexico|Distrito Federal MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000222848400127 SO - Biology of Reproduction 2004 ;():108-108 10588 UI - 5012 AU - Decaens T AU - Jimenez JJ AU - Barros E AU - Chauvel A AU - Blanchart E AU - Fragoso C AU - Lavelle P AD - Univ Rouen, UFR Sci & Tech, UPRES EA 1293, Ecol Lab, F-76821 Mont St Aignan, FranceCIAT, Soil & Plant Nutr Unit, AA-6713 Cali, ColombiaIRD Ecol, INPA, BR-69011970 Manaus, Amazonas, BrazilIRD, Lab Ecol Sols Trop, F-93143 Bondy, FranceIRD, Lab MOST, F-34394 Montpellier 5, FranceInst Ecol, Xalapa 91000, Veracruz, MexicoDecaens, T, Univ Rouen, UFR Sci & Tech, UPRES EA 1293, Ecol Lab, F-76821 Mont St Aignan, France TI - Soil macrofaunal communities in permanent pastures derived from tropical forest or savanna AB - Soil macrofauna are sensitive to land use changes and this may have implications to soil functioning. The impact of the conversion of native ecosystems into extensive or intensive pastures on soil macrofauna were assessed with a standardised methodology in two neotropical phytogeographical regions, i.e. a tropical savanna area (Eastern Plains of Colombia) and a tropical rain forest area (Brazilian Amazon). In the savanna area, extensive cattle ranching only led to a slight enhancement of earthworm populations and to short-term fire-induced decreases of macrofaunal density. In intensive pastures, the initial taxonomic richness and composition of soil macrofauna were maintained, while native earthworm biomass was strongly increased. This may be explained by the similar mesologic conditions between these systems (similar vegetation structure) and by the higher quality of the organic inputs in the pastures (roots, litter and cattle faeces). Increased macrofaunal activity with a high taxonomic diversity is expected to have positive impacts on the sustainability of pastures in Colombian savannas. In the Amazon basin, slashing and burning of the forest for intensive pasture establishment resulted in more dramatic effects on native macrofauna. Taxonomic diversity was particularly strongly affected. Native earthworm species were largely depleted at the expanse of exotic peregrine species like, e.g. Pontoscolex corethrurus. These results are probably bound to the deep environmental changes that follow the conversion of forest into grassland ecosystems. Such modifications of macrofaunal communities are known to have potential negative effects on soil functioning and on the sustainability of agropastoral systems in this area. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Colombia MH - France MH - Mexico|Veracruz PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000222490600005 L2 - tropical savannas;tropical forests;pasture establishment;soil macrofauna;earthworms;soil biodiversity;PURE GRASS PASTURES; EASTERN PLAINS; EARTHWORM CASTS; LAND MANAGEMENT; NATIVE SAVANNA; COLOMBIA; CONVERSION; STABILITY; AMAZONIA; DYNAMICS SO - Agriculture Ecosystems & Environment 2004 ;103(2):301-312 10589 UI - 6015 AU - Defeo O AU - Lercari D AD - IPN, CICIMAR, Mexico City, DF, MexicoIPN, CINVESTAV, Unidad Merida, Mexico City, DF, MexicoUNDECIMAR, Fac Ciencias, Montevideo, UruguayLercari, D, IPN, CICIMAR, AP 592,La Paz 23000,Baja Calif Sur, Mexico City, DF, Mexico TI - Testing taxonomic resolution levels for ecological monitoring in sandy beach macrobenthic communities AB - 1. Sandy beaches are subject to a variety of human-induced disturbances. However, very little is known about the consequences of disturbances on macroinfauna inhabiting these systems. 2. We evaluate the concepts of taxonomic and functional sufficiency and their potential applicability to cost-effective assessment of environmental impacts on sandy beaches. To this end, we assess the effects of an artificial freshwater discharge on the macroinfauna inhabiting three sites of a sandy beach in Uruguay affected by a gradient of effect, using different taxonomic resolution levels. 3. Species abundance and biomass data were aggregated into family, class, phylum and functional feeding guilds; distance matrices between samples were constructed for every aggregation level. Non-metric multidimensional scaling (NMDS), analysis of similarities (ANOSIM) and correlation between distance matrices from different levels of aggregation were used to explore the taxonomic resolution needed to detect the environmental impact. 4. The impact was detected at every aggregation level, including functional feeding guilds. Taxonomic resolution did not affect the outcome of the multivariate analyses, suggesting that higher taxonomic levels could be used to provide rapid responses for detecting ecological impacts in sandy beaches, or in cases with a lack of knowledge about community composition. 5. Even though NMDS with abundance data lost more information than with biomass as the taxonomic resolution decreased, it provided a better description of the short-term succession in community structure at the site with intermediate disturbance. 6. Aggregation to higher taxonomic levels did not reduce the ability of ANOSIM to discriminate between sites. The large seasonal variations in community structure give strong support to recent findings that showed that sandy beach fauna is highly plastic and has a short-term capacity for recovery from disturbances. Thus, we strongly suggest circumventing snapshot samplings in order to avoid misinterpretation of results arising from strong seasonal variations in community structure and abundance. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Uruguay PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences;Marine & Freshwater Biology;Water Resources U5 - J;Article AV - English IS - 1052-7613 UR - ISI:000220242000005 L2 - sandy beach;macroinfauna;conservation;impact assessment;taxonomic resolution;monitoring;CRAB EMERITA-BRASILIENSIS; URUGUAY; MACROINFAUNA; RECRUITMENT; POPULATIONS; CLAM; DISTURBANCE; MACROFAUNA; PATTERNS; GRADIENT SO - Aquatic Conservation-Marine and Freshwater Ecosystems 2004 ;14(1):65-74 10590 UI - 6171 AU - Defeo O AU - Cardoso RS AD - IPN, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoFac Ciencias, UNDECIMAR, Montevideo 11400, UruguayUniv Rio de Janeiro, Dept Ciencias Nat, Lab Ecol Marinha, BR-22290240 Rio De Janeiro, BrazilDefeo, O, IPN, Ctr Invest & Estudios Avanzados, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Latitudinal patterns in abundance and life-history traits of the mole crab Emerita brasiliensis on South American sandy beaches AB - Demographic and life-history attributes of the mole crab Emerita brasiliensis were analysed along 2700 km of the Atlantic coast of South America, including sandy beaches at the southernmost limit (Uruguay) and at the core of its geographical range (Brazil). Population features varied markedly within this range and exhibited systematic geographical patterns of variation. Abundance significantly increased from temperate to subtropical beaches, and the same held true for the asymptotic weight of males. Conversely, length at maturity and asymptotic weight of females increased from subtropical to temperate beaches, being inversely related to sea water temperature. Macroecological patterns in abundance and body weight showed the first large-scale evidence of scaling of population density to body size for a sandy beach population. Mortality rates (both sexes) followed a nonlinear increase from low-density temperate beaches to high-density subtropical beaches. The effect of habitat quality and availability could explain discontinuities in the species distribution within its range, and also differential responses in life-history attributes at a local scale. Asymmetries and converse latitudinal trends between sexes suggest that there is not a single general factor determining large-scale patterns in life-history traits of this species. Our results reinforce the view that density-dependent and environmental factors operating together regulate sandy beach populations. The need to develop macroecological studies in sandy beach ecology is highlighted, as knowledge acquired from local to large spatial scales throws light on population structure and regulation mechanisms MH - Brazil MH - Mexico|Yucatan MH - Uruguay PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 14 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1366-9516 UR - ISI:000189201300002 L2 - Crustacea;Anomura;Hippidae;macroecology;population dynamics;sandy beaches;South America;SCALING POPULATION-DENSITY; CLAM MESODESMA-MACTROIDES; INTERTIDAL COMMUNITIES; BODY-SIZE; CONTRASTING MORPHODYNAMICS; DONAX-HANLEYANUS; PHYSICAL FACTORS; GLOBAL PATTERNS; MACROINFAUNA; DYNAMICS SO - Diversity and Distributions 2004 ;10(2):89-98 10591 UI - 5364 AU - del Amo B AU - Veleva L AU - Di Sarli AR AU - Elsner CI AD - Consejo Nacl Invest Cient & Tecn, CIDEPINT, CICPBA, La Plata, ArgentinaCINVESTAV, Dept Fis Aplicada, Unidad Merida, Merida 97310, Yucatan, MexicoDi Sarli, AR, Consejo Nacl Invest Cient & Tecn, CIDEPINT, CICPBA, Av 52 S-N,Entre 121 & 122,B1900AYB, La Plata, Argentina TI - Performance of coated steel systems exposed to different media - Part I. Painted galvanized steel AB - The performance of different pre-treated galvanized steel/primer/topcoat paint systems applied on hot-dip galvanized steel sheets has been studied. Each panel was pre-treated with 5% Fe(NO3)(3) + 15% H3PO3 solution. After this step, the panels were coated either with acrylic (AC), alkyd (AK), vinyl (VL), epoxy base-solvent (ES) or epoxy-waterbome (EW) based corrosion-inhibiting primer using zinc molybdenum phosphate as anticorrosive pigment, and with commercially available alkyd topcoat paint. Experimental behavior of these panels under standardized salt spray chamber exposure or continuous immersion in 0.5 M NaCl, 0.5 M Na2SO4 or 0.25 M NaCl + 0.25 M Na2SO4 solutions was evaluated through periodical visual inspection (blistering and rusting degrees) and EIS measurements (corrosion evolution). Initial (dry) and final (wet) paint adhesion was also determined. EIS data has been interpreted and discussed in terms of the time dependence of the electrical (paint coating) and electrochemical (steel substrate) parameters associated with interfacial processes describing the metal/paint system deterioration. According to the electrochemical properties, visual inspection and standardized tests results, the painting systems designated as AK, ES, EW, and VL presented the best overall anticorrosive behavior under immersion conditions, but all samples failed when exposed to the salt spray chamber. System AC behaved very well in 0.25 M NaCl + 0.25 M Na2SO4 but failed in the other media. Adhesion changes outside the tested areas showed that under immersion conditions there was lateral diffusion. Good correlation between standardized and electrochemical tests results was also obtained. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Yucatan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Applied;Materials Science, Coatings & Films U5 - J;Review AV - English IS - 0300-9440 UR - ISI:000221714400005 L2 - surface pre-treatments;waterborne paint;zinc molybdenum phosphate;corrosion;painted galvanized steel;salt spray test;impedance measurements;paint blistering;equivalent circuits;ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; ZINC-RICH PAINTS; CARBON-STEEL; CORROSION; COATINGS; ADHESION; METALS; MOLYBDENUM; MECHANISM; CHLORIDE SO - Progress in Organic Coatings 2004 ;50(3):179-192 10592 UI - 6319 AU - del Bosque-Plata L AU - guilar-Salinas CA AU - Tusie-Luna MT AU - Ramirez-Jimenez S AU - Rodriguez-Torres M AU - uron-Gomez M AU - Ramirez E AU - Velasco-Perez ML AU - Ramirez-Silva A AU - Gomez-Perez F AU - Hanis CL AU - Tsuchiya T AU - Yoshiuchi I AU - Cox NJ AU - Bell GI AD - Univ Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637, USAUniv Nacl Autonoma Mexico, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab Lipidos, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Unidad Biol MOl & Med Genom, Mexico City 04510, DF, MexicoInst Mexicano Seguro Social, San Luis Potosi, MexicoUniv Texas, Hlth Sci Ctr, Ctr Human Genet, Houston, TX, USAdel Bosque-Plata, L, Univ Chicago, Dept Biochem & Mol Biol, 5841 S Maryland Ave,MC1028, Chicago, IL 60637 USA TI - Association of the calpain-10 gene with type 2 diabetes mellitus in a Mexican population AB - Variation in the calpain-10 gene (CAPN10) has been associated with risk of type 2 diabetes in the Mexican American population of Starr County, Texas. We typed five polymorphisms in the calpain-10 gene (SNP-43, -43, -63, and -110 and Indel-19) to test for association with type 2 diabetes in 248 individuals representative of the mestizo population of Mexico City and Orizaba, Mexico including 134 patients with type 2 diabetes and 114 subjects with normal fasting blood glucose levels. We found a significant difference in SNP-44 allele and genotype frequencies between type 2 diabetic and non-diabetic subjects. The rare allele at SNP-44 was associated with increased risk of type 2 diabetes (odds ratio (OR) = 2.72, 95% confidence interval (CI) = 1.16-6.35, P = 0.017). SNP-110, which is in perfect linkage disequilibrium with SNP-44, was also associated with type 2 diabetes. The SNP-43, Indel-19, and SNP-63 haplogenotype 112/121 associated with significantly increased risk (OR = 2.16, 95% CI = 1.31-3.57) of type 2 diabetes in Mexican Americans was not associated with significantly increased in risk in Mexicans (OR = 1.15, 95% Cl = 0.57-2.34). The results suggest that variation in CAPN10 affects risk of type 2 diabetes in the mestizo population of central Mexico (Mexico City and Orizaba) and in Mexican Americans (Starr County, Texas). (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1096-7192 UR - ISI:000188718400007 L2 - SUSCEPTIBILITY; VARIANTS; LOCUS SO - Molecular Genetics and Metabolism 2004 ;81(2):122-126 10593 UI - 4143 AU - del Monte-Luna P AU - Brook BW AU - Zetina-Rejon MJ AU - Cruz-Escalona VH AD - Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Dept Biol Marina & Pesquerias, La Paz 23000, Baja California, MexicoCharles Darwin Univ, Key Ctr Trop Wildlife Management, Darwin, NT 0909, Australiadel Monte-Luna, P, Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Dept Biol Marina & Pesquerias, Apartado Postal 592, La Paz 23000, Baja California, Mexico TI - The carrying capacity of ecosystems AB - We analyse the concept of carrying capacity (CC), from populations to the biosphere, and offer a definition suitable for any level. For communities and ecosystems, the CC evokes density-dependence assumptions analogous to those of population dynamics. At the biosphere level, human CC is uncertain and dynamic, leading to apprehensive rather than practical conclusions. The term CC is widely used among ecological disciplines but remains vague and elusive. We propose the following definition: the CC is 'the limit of growth or development of each and all hierarchical levels of biological integration, beginning with the population, and shaped by processes and interdependent relationships between finite resources and the consumers of those resources'. The restrictions of the concept relate to the hierarchical approach. Emergent properties arise at each level, and environmental heterogeneity restrains the measurement and application of the CC. Because the CC entails a myriad of interrelated, ever-changing biotic and abiotic factors, it must not be assumed constant, if we are to derive more effective and realistic management schemes. At the ecosystem level, stability and resilience are dynamic components of the CC. Historical processes that help shape global biodiversity (e.g. continental drift, glaciations) are likely drivers of large-scale changes in the earth's CC. Finally, world population growth and consumption of resources by humanity will necessitate modifications to the paradigm of sustainable development, and demand a clear and fundamental understanding of how CC operates across all biological levels MH - Australia MH - Mexico|Baja California PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Ecology;Geography, Physical U5 - J;Review AV - English IS - 0960-7447 UR - ISI:000224648000002 L2 - biosphere;community;ecosystem;hierarchy theory;population;renewable resource management;resilience;stability;sustainable development;CALIFORNIA CURRENT SYSTEM; LIFE-HISTORY STRATEGIES; STATISTICAL INEVITABILITY; INTERANNUAL VARIABILITY; BIOLOGICAL DIVERSITY; RENEWABLE RESOURCES; AQUATIC ECOSYSTEMS; SPECIES-DIVERSITY; EL-NINO; STABILITY SO - Global Ecology and Biogeography 2004 ;13(6):485-495 10594 UI - 5931 AU - del Pozo-Insfran D AU - Brenes CH AU - Talcottt ST AD - Univ Florida, Dept Food Sci & Human Nutr, Gainesville, FL 32611, USAITESM Campus Monterrey, Dept Food Technol, Monterrey, MexicoTalcottt, ST, Univ Florida, Dept Food Sci & Human Nutr, POB 110370, Gainesville, FL 32611 USA TI - Phytochemical composition and pigment stability of acai (Euterpe oleracea Mart.) AB - Anthocyanin and polyphenolic compounds present in acai (Euterpe oleracea Mart.) were determined and their respective contribution to the overall antioxidant capacity established. Color stability of acai anthocyanins against hydrogen peroxide (0 and 30 mmol/L) over a range of temperatures (10-30 degreesC) was also determined and compared to common anthocyanin sources. Additionally, stability in a model beverage system was evaluated in the presence of ascorbic acid and naturally occurring polyphenolic cofactors. Cyanidin 3-glucoside (1040 mg/L) was the predominant anthocyanin in acai and correlated to antioxidant content, while 16 other polyphenolics were detected from 4 to 212 mg/L. Red grape anthocyanins were most stable in the presence of hydrogen peroxide, while acai and pigments rich in acylated anthocyanins displayed lower color stability in a temperature-dependent manner. In the presence of ascorbic acid, acylated anthocyanin sources generally had increased color stability. Acai was recognized for its functional properties for use in food and nutraceutical products MH - USA MH - Mexico|Nuevo Leon PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000220285600021 L2 - acai;anthocyanins;polyphenolics;copigmentation;stability;ANTIOXIDANT CAPACITY; INTERMOLECULAR COPIGMENTATION; COLOR STABILITY; ELLAGIC ACID; ANTHOCYANINS; OXIDATION; STORAGE; JUICE; FRUIT; CONDENSATION SO - Journal of Agricultural and Food Chemistry 2004 ;52(6):1539-1545 10595 UI - 6084 AU - Del Rio-Navarro BE AU - Velazquez-Monroy O AU - Sanchez-Castillo CP AU - Lara-Esqueda A AU - Berber A AU - Fanghanel G AU - Violante R AU - Tapia-Conyer R AU - James WPT AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Fisiol & Nutr, Tlalpan 14000, DF, MexicoHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoMinist Hlth, Natl Ctr Epidemiol Vigilance, Direct Adult & Elderly Hlth Program, Mexico City, DF, MexicoGen Hosp Mexico, Mexico City, DF, MexicoGen Reg Hosp 6, Mexican Inst Social Secur, Ciudad Madero, Tamaulipas, MexicoMinist Hlth, Mexico City, DF, MexicoNatl Hlth Survey 2000, Mexico City, DF, MexicoInt Obes Task Force, London, EnglandSanchez-Castillo, CP, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Fisiol & Nutr, Vasco de Quiroga 15, Tlalpan 14000, DF, Mexico TI - The high prevalence of overweight and obesity in Mexican children AB - Objective: To establish the prevalence of overweight and obesity in Mexican children 10 to 17 years of age according to the percentiles from both the Centers of Disease Control and Prevention (CDC) and the International Obesity Task Force (IOTF). Research Methods and Procedures: Heights and weights were measured in children from nationally representative, randomly chosen households in the Mexican National Health Survey 2000. The study population consisted of 7862 boys and 8947 girls, 10 to 17 years of age. Measurements used were the percentage of children in the corresponding BMI categories for overweight and obesity specified by the CDC and the IOTF BMI percentiles. Results: The children were short, with mean Z scores for height by age varying from -0.62 +/- 1.26 to -1.12 +/- 1.06 in boys and from -0.45 +/- 1.25 to -1.19 +/- 1.12 in girls. CDC-based overweight prevalences varied by age from 10.8% to 16.1% in boys and 14.3% to 19.1% in girls, with obesity prevalences from 9.2% to 14.7% in boys and 6.8% to 10.6% in girls; these prevalences did not relate to stunting. IOTF-based excess weight prevalences were similar, with higher overweight rates (boys, 15.4% to 18.8%; girls, 18.4% to 22.3%) but lower obesity rates (boys, 6.1 % to 9%; girls, 5.9% to 8.2%). Discussion: Mexican children have one-half the overweight/obesity prevalences of U.S. Mexican-American children; however, there are higher rates in Northern Mexico, which is closer to the U.S. These escalating rates of excess weight demand new prevention, as well as management, policies MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - SILVER SPRING: NORTH AMER ASSOC STUDY OBESITY RP - NOT IN FILE U3 - TC 25 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 1071-7323 UR - ISI:000189318000006 L2 - BMI;CDC and IOTF percentiles;children;Mexico;BODY-MASS INDEX; INSULIN-RESISTANCE SYNDROME; CHILDHOOD OBESITY; DIABETES-MELLITUS; AFRICAN-AMERICAN; ADOLESCENTS; WEIGHT; HEIGHT; TRENDS; RISK SO - Obesity Research 2004 ;12(2):215-223 10596 UI - 5341 AU - del Rio-Portilla F AU - Hernandez-Marin E AU - Pimienta G AU - Coronas FV AU - Zamudio FZ AU - de la Vega RCR AU - Wanke E AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, MexicoUniv Milano Bicocca, Dipartimento Biotecnol & Biosci, Milan, ItalyPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Ave Univ 2001,Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - NMR solution structure of Cn12, a novel peptide from the Mexican scorpion Centruroides noxius with a typical beta-toxin sequence but with alpha-like physiological activity AB - Cn12 isolated from the venom of the scorpion Centruroides noxius has 67 amino-acid residues, closely packed with four disulfide bridges. Its primary structure and disulfide bridges were determined. Cn12 is not lethal to mammals and arthropods in vivo at doses up to 100 mug per animal. Its 3D structure was determined by proton NMR using 850 distance constraints, 36 phi angles derived from 36 coupling constants obtained by two different methods, and 22 hydrogen bonds. The overall structure has a two and half turn alpha-helix (residues 24-32), three strands of antiparallel beta-sheet (residues 2-4, 37-40 and 45-48), and a type II turn (residues 41-44). The amino-acid sequence of Cn12 resembles the beta scorpion toxin class, although patch-clamp experiments showed the induction of supplementary slow inactivation of Na+ channels in F-11 cells (mouse neuroblastoma N18TG-2 x rat DRG2), which means that it behaves more like an alpha scorpion toxin. This behaviour prompted us to analyse Na+ channel binding sites using information from 112 Na+ channel gene clones available in the literature, focusing on the extracytoplasmic loops of the S5-S6 transmembrane segments of domain I and the S3-S4 segments of domain IV, sites considered to be responsible for binding alpha scorpion toxins MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000221852500023 L2 - Centruroides noxius;NMR structure;patch-clamp;scorpion toxin;sodium channel;EXPERIMENTAL AUTOIMMUNE ENCEPHALOMYELITIS; CHANNEL-BLOCKING PEPTIDES; GATED SODIUM-CHANNELS; K+-CHANNELS; POTASSIUM CHANNELS; NA+-CHANNELS; 3-DIMENSIONAL MODEL; TITYUS-SERRULATUS; RECEPTOR-SITES; ANTIBODY BCF2 SO - European Journal of Biochemistry 2004 ;271(12):2504-2516 10597 UI - 3928 AU - del Rio MS AU - Martinetto P AU - Somogyi A AU - Reyes-Valerio C AU - Dooryhee E AU - Peltier N AU - Alianelli L AU - Moignard B AU - Pichon L AU - Calligaro T AU - Dran JC AD - European Synchrotron Radiat Facil, F-38043 Grenoble, FranceCNRS, Lab Cristallog, F-30842 Grenoble, FranceINAH, Mexico City, DF, MexicoINFM, OGG, ESRF, F-38043 Grenoble, FranceC2RMF, F-75041 Paris 01, Francedel Rio, MS, European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France TI - Microanalysis study of archaeological mural samples containing Maya blue pigment AB - Elemental analysis by X-ray fluorescence and particle induced X-ray emission is applied to the study of several Mesoamerican mural samples containing blue pigments. The most characteristic blue pigment is Maya blue, a very stable organo-clay complex original from Maya culture and widely used in murals, pottery and sculptures in a vast region of Mesoamerica during the pre-hispanic time (from VIII century) and during the colonization until 1580. The mural samples come from six different archaeological sites (four pre-hispanic and two from XVI century colonial convents). The correlation between the presence of some elements and the pigment colour is discussed. From the comparative study of the elemental concentration, some conclusions are drawn on the nature of the pigments and the technology used. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Spectroscopy U5 - J;Article AV - English IS - 0584-8547 UR - ISI:000224848000018 L2 - Maya blue;organo-clay complex;pigment;mural painting;PIXE;XRF;elemental analysis;PALYGORSKITE; PAINT SO - Spectrochimica Acta Part B-Atomic Spectroscopy 2004 ;59(10-11):1619-1625 10598 UI - 4957 AU - del Rio MS AU - Brinks E AU - Cepa J AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Popular Autonoma Estado Puebla, Puebla 72160, MexicoInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spaindel Rio, MS, Inst Nacl Astrofis Opt & Elect, Puebla 72000, Mexico TI - High-resolution HI observations of the galaxy NGC 404: A dwarf S0 with abundant interstellar gas AB - As part of a detailed study of the gas content in a sample of early-type galaxies, we present 21 cm H I line maps of the S0 galaxy NGC 404 at a spatial resolution of 15."2' x 14."4 (alpha x delta) and a velocity resolution of 2.6 km s(-1). The H I has been traced out to a radius R similar to 8R(25) or 48 disk scale lengths, making it one of the largest H I extents reported (800" or 12.6 kpc at the assumed distance of 3.3 Mpc). Approximately 75% of the H I resides in a doughnut, which is seen close to face-on with inner and outer radii of similar toR(25) and similar to4R(25), respectively. The optical galaxy fits snugly within the hole of the doughnut. The remaining 25% of the neutral gas is found in an annulus concentric with the doughnut and with a somewhat larger ellipticity, extending from a radius of similar to4R(25) to similar to8R(25). A total H I mass of 1.52 +/- 0.04 x 10(8) M-. is found, which implies an M-HI/L-B = 0.22 in solar units. We argue that most, if not all, of this gas is of external origin, most likely from the merger of a dwarf irregular galaxy with M-B similar to - 15.5 mag. The velocity field shows a steeply declining observed rotation curve, compatible with Keplerian decline. However, because the galaxy is close to face-on, there is a degeneracy in the determination of the intrinsic rotation curve and inclination. We therefore analyzed two extreme cases, producing tilted-ring model fits forcing either a Keplerian or a flat rotation curve through the observations; both approaches result in equally plausible fits. In both model fits, the position angle of the kinematical major axis of the annulus is distinct from that of the doughnut and ranges from 160degrees to 120degrees (for the doughnut these values are 100degrees to 60degrees). Assuming a distance of 3.3 Mpc, a total mass of 3 x 10(10) M-. is found on the basis of the Keplerian rotation curve. This implies a global M-T/L-B ratio of similar to44 in solar units, which is high and likely a reflection of the low blue luminosity of the galaxy (similar to15 times lower than the average S0 luminosity). Values for a flat rotation curve are a factor of 4 higher MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000222702800007 L2 - galaxies : elliptical and lenticular, cD;galaxies : individual (NGC 404);galaxies : kinematics and dynamics;galaxies : structure;radio lines : galaxies;MOLECULAR CLOUD CONTENT; ROTATION CURVES; SPIRAL GALAXIES; LENTICULAR GALAXIES; DISK GALAXIES; MAGNITUDES; POPULATION; DISTANCES; HYDROGEN; MATTER SO - Astronomical Journal 2004 ;128(1):89-102 10599 UI - 3805 AU - del Rio R AU - Rincon M AU - Layseca-Espinosa E AU - Fierro NA AU - Rosenstein Y AU - Pedraza-Alva G AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Vermont, Dept Med, Immunobiol Div, Burlington, VT 05405, USAUniv Autonoma San Luis Potosi, Dept Immunol, Fac Med, San Luis Potosi, MexicoRosenstein, Y, Univ Nacl Autonoma Mexico, Inst Biotecnol, AP 510-3, Cuernavaca 62250, Morelos, Mexico TI - PKC theta is required for the activation of human T lymphocytes induced by CD43 engagement AB - The turnover of phosphoinositides leading to PKC activation constitutes one of the principal axes of intracellular signaling. In T lymphocytes, the enhanced and prolonged PKC activation resulting from the engagement of the TcR and co-receptor molecules ensures a productive T cell response. The CD43 co-receptor promotes activation and proliferation, by inducing IL-2 secretion and CD69 expression. CD43 engagement has been shown to promote phosphoinositide turnover and DAG production. Moreover, PKC activation was found to be required for the activation of the MAP kinase pathway in response to CD43 ligation. Here we show that CD43 engagement led to the membrane translocation and enzymatic activity of specific PKC isoenzymes: cPKC (alpha/beta), nPKC (epsilon and theta), aPKC (zeta) and PKCmu. We also show that activation of PKCtheta resulting from CD43 ligation induced CD69 expression through an ERK-dependent pathway leading to AP-1, NF-kappaB activation and an ERK independent pathway promoting NFAT activation. Together, these data suggest that PKCtheta plays a critical role in the co-stimulatory functions of CD43 in human T cells. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Morelos MH - Mexico|San Luis Potosi MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000225173400020 L2 - CD43;PKC;T cell activation;NFAT;AP-1;NF-KB;CD69;PROTEIN-KINASE-C; NF-KAPPA-B; WISKOTT-ALDRICH SYNDROME; SIGNAL-TRANSDUCTION PATHWAYS; SERUM RESPONSE ELEMENT; LIPID RAFT RECRUITMENT; CELL-ACTIVATION; SYNERGISTIC ACTIVATION; PHORBOL ESTERS; IL-2 PROMOTER SO - Biochemical and Biophysical Research Communications 2004 ;325(1):133-143 10600 UI - 4345 AU - Del Viejo AM AU - Vega X AU - Gonzalez MA AU - Sanchez JM AD - Univ Extremadura, Fac Ciencias, Area Zool, E-06071 Badajoz, SpainITESM Sinaloa, Culiacan, Sinaloa, MexicoUniv Autonoma Sinaloa, Escuela Biol, Sinaloa, MexicoDel Viejo, AM, Univ Extremadura, Fac Ciencias, Area Zool, Campus Univ,Avenida Elvas S-N, E-06071 Badajoz, Spain TI - Disturbance sources, human predation and reproductive success of seabirds in tropical coastal ecosystems of Sinaloa State, Mexico AB - From March to July 2000, four seabird colonies in coastal ecosystems of Sinaloa, northwest Mexico were visited: on islets, a sandy beach and a long-abandoned salt-panning flat. There were partial and total breeding failures, most of them due to human activity. Amongst colonies of nine species, the breeding success of three was severely affected. All 250 Royal Tern Sterna maxima eggs were taken for direct consumption; 50% (75) of Blue-footed Booby Sula nebouxii chicks were killed for crab (Portunidae) fishing; and in a Least Tern Stenia antillarum colony (97 pairs), 50% failed due to disturbance from a fishing championship. Some of these species have priority status within Mexican and international conservation regulations. Certain aspects of these problems are discussed, and actions are suggested to balance conservation and the development of economic activities MH - Mexico|Sinaloa MH - Spain PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Ornithology U5 - J;Article AV - English IS - 0959-2709 UR - ISI:000224115000005 L2 - BREEDING SUCCESS; COMMON TERNS; LEAST-TERNS; COLONY; SELECTION; BEHAVIOR; WILDLIFE; HABITAT; NESTS; SIZE SO - Bird Conservation International 2004 ;14(3):191-202 10601 UI - 4296 AU - Delepine D AU - Khalil S AD - Univ Guanajuato, Inst Fis, Leon 37150, Gto, MexicoUniv Durham, Dept Phys, IPPP, Durham DH1 3LE, EnglandAin Shams Univ, Fac Sci, Cairo 11566, EgyptDelepine, D, Univ Guanajuato, Inst Fis, Loma Bosque,103 Col Loma Campestre, Leon 37150, Gto, Mexico TI - Top flavour violating decays in general supersymmetric models AB - We analyse the top flavour violating decays in general supersymmetric model using the mass insertion approximation. In particular, we discuss the impact of a light right-handed top-squark and large mixing between the first or second and third generation of up-squarks on processes as t --> qgamma, g. We also take into account the relevant experimental constraints from B-physics and the requirements for a successfull electroweak baryogenesis on squark mixings. We show that for general large mixings in squarks mass matrix, the branching ratio of the t --> qgamma, g (q = u, c) can be as large as 10(-6). (C) 2004 Published by Elsevier B.V MH - Egypt MH - United Kingdom MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000224053300008 L2 - baryogenesis;rare decays;supersymmetry phenomenology;ELECTROWEAK PHASE-TRANSITION; ELECTRIC-DIPOLE MOMENTS; STANDARD MODEL; CP-VIOLATION; BARYON ASYMMETRY; FINITE-TEMPERATURE; RARE DECAYS; BARYOGENESIS; QUARK; CONSTRAINTS SO - Physics Letters B 2004 ;599(1-2):62-74 10602 UI - 4421 AU - Delgadillo JA AU - Cortez ME AU - Duarte G AU - Chemineau P AU - Malpaux B AD - Univ Autonoma Agr Antonio Narro, Ctr Invest Reprod Caprina, Torreon, Coahuila, MexicoUniv Tours, CNRS, UMR 6073, INRA, F-37380 Nouzilly, FranceDelgadillo, JA, Univ Autonoma Agr Antonio Narro, Ctr Invest Reprod Caprina, Periferico & Carretera Santa Fe,AP 940, Torreon, Coahuila, Mexico TI - Evidence that the photoperiod controls the annual changes in testosterone secretion, testicular and body weight in subtropical male goats AB - The aim of this study was to determine whether the reproductive seasonality of local male goats from subtropical Mexico (26degrees N) is controlled by photoperiod. The control group (n=7) remained in an open shed under natural daylight. The two experimental groups (n=6 each) were placed in light-proof buildings and exposed for 2 years (yr) to alternations of 3 months (mo) of long days and 3 mo of short days. One group was first exposed to long days and the other one to short days. Body and testicular weights were determined every 2 wk. Blood samples were obtained weekly to determine testosterone plasma concentrations. In the control group, the body weight exhibited variations (P<0.0001) and it increased during the non-breeding season. In both treated groups, long days stimulated weight gain and short days inhibited it (P<0.0001). In the control group, testicular weight displayed variations (P<0.0001), and high values were registered in June. In the treated groups, a testicular weight reduction occurred 6-9 mo after the onset of the study. Afterwards, the changes in testicular size varied according to daylength (P<0.01). The pattern of plasma testosterone concentration in the control group varied over the study (P<0.0001) and the levels were higher from May-June to November. In both treated groups, the changes in testosterone secretion occurred according to photoperiod changes (P<0.0001). Short days enhanced testosterone secretion one photoperiodic cycle after the onset of the study and long days inhibited it. Local male goats from subtropical Mexico are sensitive to photoperiodic changes and this environmental cue may control the timing of the breeding season in natural conditions MH - France MH - Mexico|Coahuila PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Developmental Biology;Nutrition & Dietetics;Reproductive Biology;Zoology U5 - J;Article AV - English IS - 0926-5287 UR - ISI:000223894300002 L2 - male goats;testicular weight;testosterone;photoperiod;subtropics;AUSTRALIAN CASHMERE GOATS; MATURE MALE MERINO; MALE CREOLE GOATS; LONG DAYS; REPRODUCTIVE RHYTHM; NORTHERN MEXICO; SEXUAL-ACTIVITY; ANNUAL PATTERN; SUFFOLK SHEEP; FEMALE GOATS SO - Reproduction Nutrition Development 2004 ;44(3):183-193 10603 UI - 5018 AU - Delgadillo JA AU - Fitz-Rodrigiez G AU - Duarte G AU - Veliz FG AU - Carrillo E AU - Flores JA AU - Vielma J AU - Hernandez H AU - Malpaux B AD - Univ Autonoma Agr Antonio Narro, Dept Ciencias Med Vet, Ctr Invest Reprod Caprina, Torreon, Coahuila, MexicoUniv Tours, CNRS, INRA, UMR 6073, F-37380 Nouzilly, FranceDelgadillo, JA, Univ Autonoma Agr Antonio Narro, Dept Ciencias Med Vet, Ctr Invest Reprod Caprina, Torreon, Coahuila, Mexico TI - Management of photoperiod to control caprine reproduction in the subtropics AB - Reproductive seasonality is observed in some breeds originating from or adapted to subtropical latitudes. In `photoperiodic flexible breeds', such as Australian cashmere goats, the annual breeding season can be manipulated through nutrition, whereas in `photoperiodic rigid breeds', such as Creole goats from subtropical Mexico, sexual activity can be controlled by altering the photoperiod. In males from the latter breed, artificial long days, whether or not accompanied by the administration of melatonin, stimulate sexual activity during the 'on-breeding season. These treated males are able to induce the sexual activity of anoestrous females through the male effect under intensive or extensive conditions. Photoperiodic treatments and the male effect can be easily integrated into different breeding management systems in subtropical latitudes MH - France MH - Mexico|Coahuila PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 7 U4 - Developmental Biology;Reproductive Biology;Zoology U5 - J;Article AV - English IS - 1031-3613 UR - ISI:000222390500011 L2 - goats;reproductive seasonality;melatonin;male effect;MATURE MALE MERINO; AUSTRALIAN CASHMERE GOATS; MALE CREOLE GOATS; ANNUAL PATTERN; SUFFOLK SHEEP; LONG DAYS; TESTOSTERONE CONCENTRATION; PROLACTIN CONCENTRATIONS; BREEDING SEASONS; PLASMA PROLACTIN SO - Reproduction Fertility and Development 2004 ;16(4):471-478 10604 UI - 4720 AU - Delgadillo MC AU - Schiavone MM AD - Natl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Tucuman, Fac Ciencias Nat, Fdn Miguel Lillo, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaDelgadillo, MC, Natl Autonomous Univ Mexico, Inst Biol, Apartado Postal 70-233, Mexico City 04510, DF, Mexico TI - Aloina and Aloinella (Bryopsida, Pottiaceae) in northern Argentina AB - Delgadillo, M. C. (Instituto de Biologia, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-233, Delegacion Coyoacan, 04510 Mexico, D.F Mexico; e-mail: moya@servidor.unam.mx) & M. M. Schiavone (Fundacion Miguel Lillo, Facultad de Ciencias Naturales, Universidad Nacional de Tucuman, Miguel Lillo 251, 4000 Tucuman, Argentina). Brittonia 56: 291-293. 2004. Except for a robust habit, two specimens of Aloina collected in northern Argentina are morphologically similar and are tentatively attributed to A. rigida (Hedw.) Limpr. This represents an addition to the moss flora of Argentina. In addition, two specimens of Aloinetta represent significant findings: one shows features that agree with those given in the protologue for A. galeata (Mull. Hal.) Broth. and is treated here as A. galeata var. galeata to show the relationship to A. galeta var. andina (Delgad.) Delgadillo & Schiavone stat. nov.; the other belongs in A. cucullifera (Mitt.) Steere, a new record for Argentina. A key to the known species of Aloinella with updated ranges is included MH - Argentina MH - Mexico|Distrito Federal PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-196X UR - ISI:000223206300015 L2 - Pottiaceae;Aloina;Aloinella;Argentina SO - Brittonia 2004 ;56(3):291-293 10605 UI - 3301 AU - Delgado E AU - Defeo O AD - UNDECIMAR, Fac Ciencias, Montevideo 11400, UruguayIPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoDelgado, E, UNDECIMAR, Fac Ciencias, Igua 4225, Montevideo 11400, Uruguay TI - Sexual maturity in females of deep-sea red crab Chaceon notialis (Brachyura, Geryonidae) in the southwestern Atlantic Ocean AB - Chaceon notialis is a brachyuran crab inhabiting the continental slope (250-1,000 m) off Uruguay in the southwestern Atlantic Ocean, constituting one of the main exploited stocks of deep-sea red crab in the world. The objective of this paper was to estimate size at morphological and physiological sexual maturity in females of Chaceon notialis in Uruguayan waters. Crabs were obtained from commercial samples taken in 1997 and 1998. For each individual.. carapace width (CW) was measured and morphological (abdomen width and vulval features) and physiological (ovarian maturity) reproductive indicators were examined in order to estimate the size at sexual maturity. As the existence of a terminal molt still cannot be confirmed in females of C. notialis, we tested the alternative hypotheses that females: (1) have indeterminate growth and (2) exhibit a terminal molt. Hypothesis 1 was evaluated by fining the logistic maturity function that provides the CW50%. of females with mature vulvae, whereas hypothesis 2 was evaluated through the analysis of CW frequency distributions of morphologically and physiologically mature females. In addition, 50 pairs of female spermathecae were examined to determine if insemination had occurred; the carapace hardness of the individuals concerned was also noted. Two patterns of vulval morphology in females of C. notialis were observed for the first time: immature or "closed" vulvae, and mature or "opened" vulvae, respectively. Estimations of size at sexual maturity differed according to the hypothesis evaluated: under the assumption that females continue growing after the pubertal molt, mean sizes at morphological and physiological maturity (CW50%) were estimated as 70.2 mm and 71.7 mm.. respectively. Alternatively, if females have a terminal molt, mean (SD) estimates were 91.5 +/- 8.5 mm and 91.1 +/- 8.0 mm, respectively. Both scenarios clearly suggest synchrony between vulval and ovarian maturity. The species displays a soft mating system and most mature postmolt females lacks seminal contents in their reservoirs, in spite of evidence of successful mating (abrasion marks). This suggests that, due to selective exploitation of males, sperm supply may have become a limiting resource for the reproductive output of the population. Under the terminal molt hypothesis. females at the pubertal moult will be the only individuals in the population contributing to reproduction. Taking into account these findings, we suggest that the current regulations are reassessed. including the use of the terminal molt scenario for fishery management because it provides a precautionary framework in a situation where the life history of the targeted stock is data-limited MH - Mexico|Yucatan MH - Uruguay PB - REHOVOT: INT SCIENCE SERVICES/BALABAN PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology;Zoology U5 - J;Article AV - English IS - 0168-8170 UR - ISI:000226618100008 L2 - Geryonids crabs;size at sexual maturity;mating systems;CHIONOECETES-BAIRDI DECAPODA; REPRODUCTIVE-BIOLOGY; SNOW CRAB; MATING-BEHAVIOR; OPILIO; PORTUNIDAE; MAJIDAE; WATER; SIZE; QUINQUEDENS SO - Invertebrate Reproduction & Development 2004 ;46(1):55-62 10606 UI - 5111 AU - Delgado E AU - Lopez-Dellamary F AU - Allan GG AU - Andrade A AU - Contreras H AU - Regla H AU - Cresson T AD - Univ Guadalajara, Dept Madera Celulosa & Papel, Zapopan 45020, Jalisco, MexicoUniv Washington, Dept Chem Engn, Seattle, WA 98195, USACyberMetrics, Sunnyvale, CA 94086, USADelgado, E, Univ Guadalajara, Dept Madera Celulosa & Papel, Apartado Postal 52-93, Zapopan 45020, Jalisco, Mexico TI - Zwitterion modification of fibres: Effect of fibre flexibility on wet strength of paper AB - The modification of cellulose surfaces with zwitterions derived from the amino acids L-lysine or L-tyrosine is described. Paper made from these zwitterionic fibres retained more than 30% of their dry strength after being saturated with water. Measurements of the strength of never-dried zwitterionic paper webs indicated that the introduction of zwitterions onto the fibres produced strong webs when their solids contents rose above 55% MH - Mexico|Jalisco MH - USA PB - MONTREAL: PULP & PAPER TECHNICAL ASSOCIATION CANADA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0826-6220 UR - ISI:000222250700005 L2 - amphoteric compounds;lysine;amino acids;surface treatment;fibers;flexibility;wet strength;SURFACE MODIFICATION SO - Journal of Pulp and Paper Science 2004 ;30(5):141-144 10607 UI - 5580 AU - Delibes M AU - Clavero M AU - Prenda J AU - Blazquez MD AU - Ferreras P AD - CSIC, Estac Biol Donana, Dept Appl Biol, Seville 41013, SpainUniv Huelva, Dept Biol Ambiental & Salud Publ, Huelva 21071, SpainCIBNOR, La Paz 23000, Baja California, MexicoUCLM, CSIC, JCCM, Inst Invest Recursos Cineget, Ciudad Real 13080, SpainDelibes, M, CSIC, Estac Biol Donana, Dept Appl Biol, Avda Maria Luisa S-N, Seville 41013, Spain TI - Potential impact of an exotic mammal on rocky intertidal communities of northwestern Spain AB - Being the interface of sea and land, the coast can be invaded by introduced species coming from either of these two worlds. Recent reviews of coastal invasions emphasize the human-mediated transport of non-indigenous marine plants and invertebrates, forgetting the potential role of invaders of terrestrial origin. By studying the diet of the introduced American mink (Mustela vison) on a rocky shore of southwestern Europe, we draw attention to the potential impact on intertidal communities of exotic species coming from inland. We analysed 199 mink faeces collected in August 1997 and August 1999 in Baiona, a coastal and urban area of northern Spain recently invaded by minks. The diet of the species was based almost exclusively on crabs (45.4% of individual prey) and fish (53.3%). Most crabs were marbled crabs (Pachygrapsus marmoratus) and most fish were adult blennies (Coryphoblennius galerita and Lipophrys pholis). Given its energy requirements (about 1250kJ/day), a single mink will consume during the month of August approximately 945 blennies and 496 crabs. Although we lack accurate data on mink abundance, a cautious estimation (4 mink/km before dispersal), supported by field observations, suggests that predation in August may reach 3780 blennies and 1984 crabs per km of shoreline. This predation pressure could affect the numbers of blennies and (less probably) crabs, indirectly benefiting the populations of their prey, that is, sessile invertebrates and snails. More field research is needed, but our results suggest that an exotic non-marine top predator such as the American mink could affect intertidal communities in Eurasia MH - Mexico|Baja California MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1387-3547 UR - ISI:000221255100009 L2 - alien mammal;American mink;Blennidae;coast;crab;invasion;Mustela vison;Pachygrapsus marmoratus;rocky intertidal;MINK MUSTELA-VISON; AMERICAN-MINK; LUTRA-LUTRA; PREDATION; COASTAL; PATTERNS; PORTUGAL; OTTER; FISH SO - Biological Invasions 2004 ;6(2):213-219 10608 UI - 5228 AU - DelVecchyo C AU - Caloca J AU - Caloca J AU - Gomez-Jauregui J AD - Cent Med & Cirugia Especializada, Tijuana, Baja California, MexicoNatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoHosp Gen Mexico City, Dept Plast & Reconstruct Surg, Mexico City, DF, MexicoCaloca, J, POB 431186, San Diego, CA 92143, USA TI - Evaluation of breast sensibility using dermatomal somatosensory evoked potentials AB - This study was undertaken to prospectively evaluate breast sensibility before and after reduction mammaplasty with a new, objective, and quantitative neurophysiologic method based on the anatomic knowledge of breast innervation and the congruent areas of dermatomal maps. An innovative application of dermatomal somatosensory evoked potentials was used to study the breast regions of 42 healthy women, bilaterally. The areas stimulated in each breast were the superior quadrant, the nipple-areola complex and the medial and lateral quadrants, and the inferior quadrant: these areas correspond to T3, T4, and T5 dermatomes, respectively, following the accepted concepts of segmentary innervation of the skin. The two groups of 21 patients each were formed according to breast size: group I comprised small-breasted, unoperated controls (brassiere cup size A or B); group 11 comprised macromastia patients (brassiere cup size C or greater) who presented to a general plastic surgery department to)breast reduction surgery. First the authors established the normal range of latency and amplitude in the dermatomal somatosensory evoked potentials for the five areas stimulated in patients with small breasts and compared these parameters with those obtained front patients with macromastia. Then. after the macromastia patients underwent reduction mammaplasty rising the McKissock technique, the authors compared the postoperative sensory, values With their own preoperative values and with those from the small-breasted group. Using dermatomal somatosensory evoked potentials, they found that small breasts were statistically more sensitive than large breasts, which concurs with studies in the literature that rise other methods to evaluate breast sensibility. They also found that after breast reduction, the macromastia patients presented statistically significant improvement in breast sensibility in, 0 relation to their own preoperative latency and amplitude values, with no statistical difference in amplitude with respect to the small-breasted group; this finding suggests 0 that after breast reduction, sensibility similar to that of the small-breasted group can be considered a possibility. Furthermore, in comparisons of each of the five areas stimulated, there was no significant difference in values within the small-breasted group or within the macromastia group before or after surgery; this supports a possible overlap between adjacent. dermatomes. This innovative application of dermatomal somatosensory evoked potentials is an objective, quantitative, and noninvasive method that has allowed the authors to evaluate breast sensibility and to compare postsurgical sensory outcomes MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Surgery U5 - J;Article AV - English IS - 0032-1052 UR - ISI:000221917700012 L2 - NIPPLE-AREOLA SENSIBILITY; REDUCTION MAMMAPLASTY; QUANTITATION; SENSATION; INFERIOR; COMPLEX; SURGERY SO - Plastic and Reconstructive Surgery 2004 ;113(7):1975-1983 10609 UI - 4368 AU - Dembowski C AU - Dietz B AU - Friedrich T AU - Graf HD AU - Heine A AU - Mejia-Monasterio C AU - Miski-Oglu M AU - Richter A AU - Seligman TH AD - Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, GermanyCtr Nonlinear & Complex Syst, I-22100 Como, ItalyUNAM, Ctr Ciencias Fis, Mexico City, DF, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoDembowski, C, Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany TI - First experimental evidence for quantum echoes in scattering systems AB - A self-pulsing effect termed quantum echoes has been observed in experiments with an open superconducting and a normal conducting microwave billiard whose geometry provides soft chaos, i.e., a mixed phase space portrait with a large stable island. For such systems a periodic response to an incoming pulse has been predicted. Its period has been associated with the degree of development of a horseshoe describing the topology of the classical dynamics. The experiments confirm this picture and reveal the topological information MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000224131400042 L2 - CHAOTIC SCATTERING; MICROWAVE; BILLIARD SO - Physical Review Letters 2004 ;93(13): 10610 UI - 5966 AU - Deng WY AU - Puente JL AU - Gruenheid S AU - Li Y AU - Vallance BA AU - Vazquez A AU - Barba J AU - Ibarra JA AU - O'Donnell P AU - Metalnikov P AU - Ashman K AU - Lee S AU - Goode D AU - Pawson T AU - Finlay BB AD - Univ British Columbia, Biotechnol Lab, Vancouver, BC V6T 1Z3, CanadaUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoMt Sinai Hosp, Samuel Lunenfeld Res Inst, Toronto, ON M5G 1X5, CanadaFinlay, BB, Univ British Columbia, Biotechnol Lab, 237-6174 Univ Blvd, Vancouver, BC V6T 1Z3, Canada TI - Dissecting virulence: Systematic and functional analyses of a pathogenicity island AB - Bacterial pathogenicity islands (PAI) often encode both effector molecules responsible for disease and secretion systems that deliver these effectors to host cells. Human enterohemorrhagic Escherichia coli (EHEC), enteropathogenic E. coli, and the mouse pathogen Citrobacter rodentium (CR) possess the locus of enterocyte effacement (LEE) PAI. We systematically mutagenized all 41 CR LEE genes and functionally characterized these mutants in vitro and in a murine infection model. We identified 33 virulence factors, including two virulence regulators and a hierarchical switch for type III secretion. In addition, 7 potential type III effectors encoded outside the LEE were identified by using a proteomics approach. These non-LEE effectors are encoded by three uncharacterized PAIs in EHEC O157, suggesting that these PAIs act cooperatively with the LEE in pathogenesis. Our findings provide significant insights into bacterial virulence mechanisms and disease MH - Canada MH - Mexico|Morelos PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 131 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000220163800050 L2 - ENTEROPATHOGENIC ESCHERICHIA-COLI; III SECRETION; CITROBACTER-RODENTIUM; ENTEROCYTE EFFACEMENT; COLONIC HYPERPLASIA; HOST-CELLS; PROTEINS; O157-H7; GENE; LEE SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(10):3597-3602 10611 UI - 3300 AU - Depuev VH AU - Pulinets SA AD - Natl Autonomous Univ Mexico, Inst Geophys, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Terr Magnetism Ionosphere & Radio Wave P, IZMIRAN, Troitsk 142092, Moscow, RussiaPulinets, SA, Natl Autonomous Univ Mexico, Inst Geophys, Ciudad Univ,Delegacion Coyoacan, Mexico City 04510, DF, Mexico TI - A global empirical model of the ionospheric topside electron density AB - As it was mentioned in many publications, the Bent model for the topside ionosphere used in IRI is not adequate, especially for the periods of high solar activity. Additional efforts are necessary to improve the empirical presentation of the electron concentration vertical distribution in topside ionosphere. The present paper is review of attempts to create the empirical model of the topside vertical profile undertaken within the frame of IRI Task Force Activity Workshops held at ICTP, Trieste. The Intercosmos-19 topside profiles database was used. The profile was approximated by Epstein function with the altitude dependent F2 layer thickness parameter B-2u. The main task was to find if the latitudinal dependencies of the model parameters have the regular character. The model was presented as the set of coefficients characterizing the profile for different latitudes, season and local time. Up to now the model is limited by the period of high solar activity. Attempts were made on revealing the longitudinal dependencies and its inclusion in the model. (C) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - KIDLINGTON: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000226373800024 L2 - ionosphere;topside electron density;IRI SO - Iri: Quantifying Ionospheric Variability 2004 ;34(9):2016-2020 10612 UI - 4072 AU - Dereszewska A AU - Alegria A AU - Olayo R AD - Gdynia Maritime Univ, Dept Chem, PL-81225 Gdynia, PolandUniv Pais Vasco, Dept Fis Mat, EHU, E-20080 San Sebastian, SpainUniv Pais Vasco, CSIC, Unidad Fis Mat, EHU, E-20080 San Sebastian, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoDereszewska, A, Gdynia Maritime Univ, Dept Chem, 83 Morska St, PL-81225 Gdynia, Poland TI - Dielectric study of the phase diagram of the poly (gamma-benzyl-L-glutamate)/dimethylformamide system AB - The phase diagram for solutions of poly(gamma-benzyl-L-glutamate) in dimethylformamide has been investigated over the entire composition and temperature ranges with dielectric spectroscopy. The dielectric response in this system is dominated by ionic mobility, and phase transitions have been detected as changes in the ionic conductivity. The phase boundaries, determined by dielectric spectroscopy, are consistent with earlier published results obtained by a combination of optical microscopy observations and nuclear magnetic resonance and differential scanning calorimetry studies. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Poland MH - Spain PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 0887-6266 UR - ISI:000224570600010 L2 - dielectric properties;liquid-crystalline polymers (LCP);phase diagrams;LIQUID-CRYSTALS; RELAXATION SPECTROSCOPY; MOLECULAR-DYNAMICS; POLY-GAMMA-BENZYL-ALPHA,L-GLUTAMATE-DIMETHYLFORMAMIDE; THERMODYNAMICS; ISOCYANATE SO - Journal of Polymer Science Part B-Polymer Physics 2004 ;42(21):3943-3952 10613 UI - 4046 AU - DeSouza O AU - Miramontes O AD - Univ Fed Vicosa, Dept Anim Biol, BR-36571000 Vicosa, MG, BrazilUniv Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, MexicoDeSouza, O, Univ Fed Vicosa, Dept Anim Biol, BR-36571000 Vicosa, MG, Brazil TI - Non-asymptotic trends in the social facilitated survival of termites (Isoptera) AB - Survival of grouped termites is known to be socially facilitated, since individual times to death correlate positively with the number of termites confined per unit volume (= group density). Intuitively, this should attain an asymptote, but here we report on experimental evidence that survival as a function of group density in confined Cornitermes cumulans (Kollar) termites does not increase asymptotically. Rather, it peaks at a density range at which individual survival is maximal. Interestingly, this same pattern was noted more than fifty years ago for some social insects, but it was regarded as "aberrant" due to the intuitive notion that individual survival should increase asymptotically with the number of individuals in the group. We also provide evidence that individual activity -measured as mobility- is maximal at approximately the same group density range as the observed survival. We argue that a biological link exists between survival and individual mobility of termites confined in groups MH - Brazil MH - Mexico|Distrito Federal PB - CHICO: CALIF STATE UNIV RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0361-6525 UR - ISI:000224660200007 L2 - optimal density;group size;self-organized survival;GROUP-SIZE; NONLINEAR DYNAMICS; INFORMATION; NETWORKS SO - Sociobiology 2004 ;44(3):527-538 10614 UI - 4007 AU - Devesa V AU - Del Razo LM AU - Adair B AU - Drobna Z AU - Waters SB AU - Hughes MF AU - Styblo M AU - Thomas DJ AD - Univ N Carolina, Ctr Environm Med Asthma & Lung Biol, Chapel Hill, NC 27599, USANatl Polytech Inst, Ctr Res Adv Studies, Dept Toxicol, Mexico City, DF, MexicoUS EPA, Pharmacokinet Branch, Expt Toxicol Div, Natl Hlth & Environm Effects Res Lab,Off Res & De, Res Triangle Pk, NC 27711, USAUniv N Carolina, Sch Med, Dept Pediat, Chapel Hill, NC 27599, USAUniv N Carolina, Curriculum Toxicol, Chapel Hill, NC 27599, USAStyblo, M, Univ N Carolina, Ctr Environm Med Asthma & Lung Biol, Chapel Hill, NC 27599 USA TI - Comprehensive analysis of arsenic metabolites by pH-specific hydride generation atomic absorption spectrometry AB - In a variety of biological systems, inorganic arsenic ( iAs) is metabolized to yield methylated arsenicals that contain arsenic in + 5 or +3 oxidation states. Atomic absorption spectrometry ( AAS) coupled with a pH- specific generation of arsines has been used for selective analysis of trivalent and pentavalent inorganic, mono-, and dimethylated arsenicals in biological matrices. We have optimized this method to permit simultaneous detection and quantification of all relevant metabolites of iAs, including trimethylarsine oxide ( TMAs (V) O). The optimization includes increasing the density of the chromatographic adsorbent used for cold- trapping of generated arsines and modi. cation of the temperature gradient for release of arsines from the cold trap. These modifications improve the boiling- point separation of arsine, methylarsine, dimethylarsine, and trimethylarsine before the detection by AAS. Arsines from trivalent arsenicals and from TMAs (V) O are selectively generated at pH 6. At pH 1, arsines are generated from both tri- and pentavalent arsenicals. Thus, the optimized technique permits analysis of arsenite ( iAs (III)), arsenate ( iAs (V)), monomethylarsonic acid ( MAs (V)), monomethylarsonous acid ( MAs (III)), dimethylarsinic acid ( DMAs (V)), dimethylarsinous acid ( DMAs (III)), and TMAs (V) O. The detection limits range from 0.14 ng As ( for TMAs O-V) to 0.40 ng As ( for iAs (V)). Calibration curves are linear over the concentration range of 0.5 - 100 ng As. Recoveries vary between 85 and 124%. The precision of the method in various biological matrices ranges from 1.0 to 14.5%. Using the optimized technique, both trivalent and pentavalent methylated and dimethylated arsenicals, but not TMAs (V) O, have been detected in cultured primary human hepatocytes exposed to iAs (III). In contrast, TMAs (V) O was detected as the final product of in vitro methylation of iAs (III) by rat As (III)- methyltransferase, cyt19. TMAs (V) O was also detected in the urine of mice treated with MAs (V) or DMAs (V). Thus, the optimized method improves the efficiency of arsenic speciation analysis in biological matrices, providing a more comprehensive picture of the role of metabolism in the disposition and action of iAs MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Analytical;Spectroscopy U5 - J;Article AV - English IS - 0267-9477 UR - ISI:000224894800007 L2 - TRIVALENT METHYLATED ARSENICALS; DIMETHYLARSINIC ACID; HUMAN URINE; MONOMETHYLARSONOUS ACID; TRIMETHYLARSINE OXIDE; SPECIATION ANALYSIS; SOLVENT-EXTRACTION; HAMSTER; RATS; EXCRETION SO - Journal of Analytical Atomic Spectrometry 2004 ;19(11):1460-1467 10615 UI - 5080 AU - Devroye L AU - Zamora-Cura C AD - McGill Univ, Sch Comp Sci, Montreal, PQ H3A 2K6, CanadaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City, DF, MexicoDevroye, L, McGill Univ, Sch Comp Sci, Montreal, PQ H3A 2K6, Canada TI - Expected worst-case partial match in random quadtries AB - We consider random multivariate quadtries obtained from n points independently and uniformly distributed on the unit cube of R-d. Let N-n(y) be the complexity of the standard partial match algorithm for fixed vector y, where y is a vector in R-s, 0 < s < d. We study N-n = sup(y) N-n(y), the worst-case time for partial match. Among other things, we show that partial match is very stable, in the sense that sup(y) N-n(y)/inf(y) N-n(y) --> 1 in probability. (C) 2003 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0166-218X UR - ISI:000222367800006 L2 - multivariate trie;probabilistic analysis;partial match;LIMITING DISTRIBUTIONS; TRIE; INEQUALITIES; RETRIEVAL; HEIGHT; TREES SO - Discrete Applied Mathematics 2004 ;141(1-3):103-117 10616 UI - 6188 AU - Dheepa J AU - Sathyamoorthy R AU - Velumani S AU - Subbarayan A AU - Natarajan K AU - Sebastian PJ AD - Kongunadu Arts & Sci Coll, R&D Dept Phys, Coimbatore 641029, Tamil Nadu, IndiaInst Mexicano Petr, Mexico City 07730, DF, MexicoSathyamoorthy, R, Kongunadu Arts & Sci Coll, R&D Dept Phys, Coimbatore 641029, Tamil Nadu, India TI - Electrical resistivity of thermally evaporated bismuth telluride thin films AB - Semiconducting chalcogenide thin films have been receiving considerable attention in the recent years because of their wide applications in the various fields of science and technology. The studies of the electronic properties of semiconductors have been largely stimulated by attractive micro-electronic device applications. Among the various V-VI compounds, Bismuth Telluride (Bi2Te3) is an established low-temperature thermo electric material and is widely employed in thermoelectric generators and coolers. The present work deals with the structural and the electrical characterization of Bi2Te3 thin films vacuum deposited on well-cleaned glass substrates. A constant rate of deposition was maintained through out the process. To obtain uniform and homogeneous film thickness through out on all the substrates a rotary drive was employed. Quartz crystal thickness monitor was used to measure the thickness of the samples. From the X-ray diffractogram the Bi2Te3 films are found to be amorphous at lower thicknesses and posses hexagonal polycrystalline structure at higher thickness., having lattice parameters a = 4.44 Angstrom and c = 29.40 Angstrom. The grain size of the Bi2Te3 thin films before annealing and after annealing are found to be 100 and 160 Angstrom, respectively. The micro-strain and the dislocation density are found to decrease after annealing. The thermogravimetry-differential thermal analysis (TG-DTA) studies revealed that the Bi2Te3 films are nondecomposable. Electrical resistivity, TCR measurements have been carried out as a function of varying temperatures in the range 303-453 K are found to show the size effect. Analyzing the size dependence of electrical resistivity it is found that the electrical resistivity is a linear function of the reciprocal of thickness of the film. The energy gap of Bi2Te3 thin film was calculated from the graph ln rho vs. 1/T and it is found that the energy gap decreases with increasing thickness. From the negative values of TCR, it is inferred that Bi2Te3 films exhibit semiconducting behavior. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000189082200003 L2 - Bi2Te3;thin films;electrical resistivity;thermal evaporation;STRUCTURAL-CHARACTERIZATION; THERMOELECTRIC-MATERIALS; GROWTH SO - Solar Energy Materials and Solar Cells 2004 ;81(3):305-312 10617 UI - 5466 AU - Dhillion SS AU - guilar-Stoen M AU - Camargo-Ricalde SL AD - Agr Univ Norway, Dept Ecol & Nat Resource Management, N-1432 As, NorwayUniv Oslo, MOB Grp Ctr Dev & Environm, N-0317 Oslo, NorwayUniv Autonoma Metropolitana Iztapalapa, Div Ciencias Biol & Salud, Dept Biol, Mexico City 09340, DF, MexicoDhillion, SS, Agr Univ Norway, Dept Ecol & Nat Resource Management, POB 5003, N-1432 As, Norway TI - Integrative ecological restoration and the involvement of local communities in the Tehuacan-Cuicatlan Valley, Mexico MH - Mexico|Distrito Federal MH - Norway PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences U5 - J;Editorial Material AV - English IS - 0376-8929 UR - ISI:000221643800001 L2 - DIVERSITY SO - Environmental Conservation 2004 ;31(1):1-3 10618 UI - 4133 AU - Diaz AF AU - Felix-Navarro RM AD - San Jose State Univ, Dept Chem & Mat Engn, San Jose, CA 95192, USAInst Tecnol Tijuana, Ctr Graduados & Invest, AP, Tijuana 22000, Beja California, MexicoDiaz, AF, San Jose State Univ, Dept Chem & Mat Engn, 1 Washington Sq, San Jose, CA 95192 USA TI - A semi-quantitative tribo-electric series for polymeric materials: the influence of chemical structure and properties AB - A semi-quantitative tribo-charging series that includes a wide range of synthetic and natural polymers was constructed by combining four qualitative triboelectric series from literature reports plus quantitative charging results with metal contacts. This not only connects the results from different laboratories but it also provides a series with a wide variety of polymeric materials which can be used to estimate their relative charging capacity. The ordering of the polymers in the series suggests that the charging develops from the transfer of protons between the contacting surfaces. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0304-3886 UR - ISI:000224503900003 L2 - triboelectric series;contact charging;contact electrification;CONTACT ELECTRIFICATION; SURFACES; IONS SO - Journal of Electrostatics 2004 ;62(4):277-290 10619 UI - 5904 AU - Diaz D AU - Delgadillo DM AU - Perez-Reyes E AU - Gomora JC AD - Univ Virginia, Charlottesville, VA, USAUNAM, Inst Cell Physiol, Mexico City, DF, Mexico TI - Blocking effect of Cd2+ and La3+ on Ca(v)3 channels: unblocking at extreme voltages MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000187971202198 SO - Biophysical Journal 2004 ;86(1):426A-426A 10620 UI - 1812 AU - Diaz FJ AU - Hagan DR AU - Horvath SM AD - Univ Guanajuato, Leon, MexicoNASA, JSC, Houston, TX, USAUniv Calif Santa Barbara, Santa Barbara, CA 93106, USA TI - Plasma volume changes during maximal exercise in different postures MH - Mexico|Guanajuato MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Sport Sciences U5 - J;Meeting Abstract AV - English IS - 0195-9131 UR - ISI:000228188300282 SO - Medicine and Science in Sports and Exercise 2004 ;36(5):S60-S60 10621 UI - 5726 AU - Dichamp C AU - Taillibert S AU - guirre-Cruz L AU - Lejeune J AU - Marie Y AU - Kujas ME AU - Delattre JY AU - Hoang-Xuan K AU - Sanson M AD - Univ Paris 06, Hop La Pitie Salpetriere, Federat Neurol Mazarin, F-75013 Paris, FranceUniv Paris 06, Hop La Pitie Salpetriere, INSERM, U495, F-75013 Paris, FranceUniv Paris 06, Hop La Pitie Salpetriere, Lab Neuropathol R Escourolle, U495, F-75013 Paris, FranceInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoSanson, M, Univ Paris 06, Hop La Pitie Salpetriere, Federat Neurol Mazarin, 47 Bd Hop, F-75013 Paris, France TI - Loss of 14q chromosome in oligodendroglial and astrocytic tumors AB - Loss of chromosome 14q has been investigated in 142 gliomas. Loss of heterozygosity (LOH) at one or more microsatellite has been found in 8/30 grade II (27%) and 2/21 grade III (10%) oligodendrogliomas, 3/9 grade II (33%) and 5/15 grade III (33%) oligoastrocytomas, 0/9 grade II (0%) and 1/7 grade III (14%) astrocytomas, 11/51 glioblastomas (22%). Two minimal regions were identified on 14q21.2 - 14q24.3 ( between D14S288 and D14S74) and 14q31.3 - 14q32.1 (between D14S74 and D14S65). Loss of 14q was not correlated to survival, histological grading and subtype or other genetic alterations, except for 1p deletions. Taken together, these data suggest that LOH14q is an early alteration involving 20% of glioma MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Oncology;Clinical Neurology U5 - J;Article AV - English IS - 0167-594X UR - ISI:000220869800004 L2 - chromosome 14q;glioma;oligodendroglioma;glioblastoma;SUPPRESSOR GENE LOCI; RENAL-CELL CARCINOMA; HETEROZYGOSITY; NEUROBLASTOMA; PROGRESSION; SURVIVAL; CANCER SO - Journal of Neuro-Oncology 2004 ;67(3):281-285 10622 UI - 5838 AU - Dickson JL AU - Ortiz-Estrada C AU - Alvarado JE AU - Hwang HS AU - Sanchez IC AU - Luna-Barcenas G AU - Lim KT AU - Johnston KP AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USACINVESTAV, Unidad Queretaro, Lab Invest Mat, Queretaro 76230, MexicoPukyung Natl Univ, Div Image & Informat Engn, Pusan 608739, South KoreaInst Tecnol Celaya, Dept Chem Engn, Celaya 38010, MexicoIPN, ESIQIE, DIQI, Mexico City 01210, DF, MexicoUniv Iberoamer, Dept Ingn & Ciencias Quim, Mexico City 01210, DF, MexicoJohnston, KP, Univ Texas, Dept Chem Engn, Austin, TX 78712, USA TI - Critical flocculation density of dilute water-in-CO2 emulsions stabilized with block copolymers AB - The critical flocculation density (CFD), that is, the CO2 density below which flocculation occurs, was studied for dilute water-in-CO2 (W/C) miniemulsions stabilized with poly(1,1-dihydroperfluorooctyl methacrylate)-b-poly(ethylene oxide) (PFOMA-b-PEO) surfactants. The CFD, which was measured by turbidimetry, decreased as the PFOMA molecular weight was increased, the average droplet size was decreased, the surfactant loading was increased, and the temperature was increased. A simple model, which addressed both the van der Waals attraction between droplets and osmotic solvent-tail interactions, was in good qualitative agreement with the experimentally observed trends for the CFD and predicted a decrease in emulsion stability as the CO2 density was lowered toward the theta density for PFOMA in bulk CO2. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - South Korea MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000220512900027 L2 - supercritical fluids;carbon dioxide;steric stabilization;miniemulsions;emulsions;SUPERCRITICAL-CARBON-DIOXIDE; ANGLE NEUTRON-SCATTERING; COLLOID STABILIZATION; STERIC STABILIZATION; INTERFACIAL-TENSION; POLYMER ADSORPTION; CHELATING-AGENTS; LIGHT-SCATTERING; PHASE-BEHAVIOR; WATER SO - Journal of Colloid and Interface Science 2004 ;272(2):444-456 10623 UI - 5225 AU - Diego-Forbis T AU - Douglas R AU - Gorsline D AU - Nava-Sanchez E AU - Macke L AU - Banner J AD - Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089, USAInst Politecn Nacl, Ctr Interdiscipinero Ciencias Marinas, La Paz, Baja California, MexicoUniv Texas, Dept Geol Sci, Austin, TX, USADouglas, R, Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089, USA TI - Late Pleistocene (Last Interglacial) terrace deposits, Bahia Coyote, Baja California Sur, Mexico AB - Late Pleistocene age terrace deposits are exposed in the narrow cliffed coastal plain of Bahia Coyote, Baja California Sur, resting unconformably on the lagoonal-shallow water volcaniclastics of the early Miocene Cerro Colorado Member of the El Cien Formation. The terrace is dissected by widely spaced arroyos and partically covered by alluvial fans in the inner and central areas. The marine deposits vary in thickness from 0.5 to 10 m and were laid down in pre-existing erosional channels and depressions in the Pleistocene landscape. The sequence begins with a cobble conglomerate with oyster shells, overlain by poorly bedded molluscan-rich bioclastic sands and coral rubble, beds of massive Porites in growth position and coral-rhodolith sands and marls. Beach sands and gravels and coastal dunes cap the sequence. Samples of Porites panamensis selected for U/Th dating are well-preserved aragonite (> 95%). Preliminary results yield U/Th ages of 109-209 ka but the corals have initial delta U-234 values in excess of modern seawater values. This indicates open-system behavior and uncertainty associated with the ages. A corrected age for the top of the massive Porites unit suggests that the corals grew during the last interglacial, marine isotope stage (MIS) 5e sea level high stand. Assuming global sea level during MIS 5e was ca. 4-5 in above present-day sea level (McCulloch and Esat, 2000) and the growth position of the corals was 1-5 m below sea level, the terraces have been uplifted between 12 and 25 m (12-15 cm/kyr). This is consistent with other terrace-based uplift rates for the central Baja California peninsula, north of the La Paz fault. (C) 2004 Elsevier Ltd and INQUA. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1040-6182 UR - ISI:000222023600004 L2 - URANIUM-SERIES AGES; SEA-LEVEL; NORTH-AMERICA; PACIFIC COAST; PERIOD; CORALS; PENINSULA; DURATION; HAWAII SO - Quaternary International 2004 ;120():29-40 10624 UI - 4848 AU - Dietz B AU - Lombardi M AU - Seligman TH AD - Univ Grenoble 1, Spectrometrie Phys Lab, CNRS, UMR 5588, F-38402 St Martin Dheres, FranceTech Univ Darmstadt, Inst Phys Nucl, D-64287 Darmstadt, GermanyUNAM, Ctr Ciencias Fis, Col Chamilpa, Morelos, MexicoCtr Int Ciencias, Cuernavaca, Morelos, MexicoLombardi, M, Univ Grenoble 1, Spectrometrie Phys Lab, CNRS, UMR 5588, BP87, F-38402 St Martin Dheres, France TI - Unified theory of bound and scattering molecular Rydberg states as quantum maps AB - Using a representation of multichannel quantum defect theory in terms of a quantum Poincare map for bound Rydberg molecules, we apply Jung's scattering map to derive a generalized quantum map, that includes the continuum. We show that this representation not only simplifies the understanding of the method, but moreover produces considerable numerical advantages. Finally we show under what circumstances the usual semi-classical approximations yield satisfactory results. In particular we see that singularities that cause problems in semi-classics are irrelevant to the quantum map. (C) 2004 Elsevier Inc. All rights reserved MH - France MH - Germany MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-4916 UR - ISI:000222974400008 L2 - Rydberg molecule;semi-classical physics;quantum chaos;DEFECT THEORY; POINCARE MAP; INTENSITIES; MECHANICS; DYNAMICS; SYSTEMS; SPECTRA; SERIES; CHAOS SO - Annals of Physics 2004 ;312(2):441-479 10625 UI - 5076 AU - DiGirolamo AM AU - Ramakrishnan U AU - Neufeld LM AU - Rivera J AU - Gonzalez-Cossio T AU - Martorell R AD - Emory Univ, Atlanta, GA 30322, USACtr Invest Nutr & Salud, Inst Nacl Salud Publ, Cuernavaca, Morelos, Mexico TI - Effects of multiple micronutrient supplements on child development in semi-rural Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602468 SO - Faseb Journal 2004 ;18(4):A513-A513 10626 UI - 4831 AU - DiPaolo JA AU - varez-Salas LM AD - NCI, Ctr Canc Res, NIH, Bethesda, MD 20894, USACINVESTAV, Dept Genet & Mol Biol, Lab Gene Therapy, Mexico City 07360, DF, MexicoDiPaolo, JA, NCI, Ctr Canc Res, NIH, Bethesda, MD 20894, USA TI - Advances in the development of therapeutic nucleic acids against cervical cancer AB - Cervical cancer is the second most common neoplastic disease affecting women worldwide. Basic, clinical and epidemiological analyses indicate that expression of high-risk human papillomaviruses (HPVs) E6/E7 genes is the primary cause of cervical cancer and represent ideal targets for the application of therapeutic nucleic acids (TNAs). Antisense oligodeoxyribonucleotides (AS-ODNs) and ribozymes (RZs) are the most effective TNAs able to inhibit in vivo tumour growth by eliminating HPV-16 and HPV-18 E6/E7 transcripts. Expression of multiple RZs directed against alternative target sites by triplex expression systems may result in the abrogation of highly variable HPVs. More recently, RNA interference (RNAi) gene knockdown phenomenon, induced by small interfering RNA (siRNA), has demonstrated its potential value as an effective TNA for cervical cancer. siRNA and aptamers; as TNAs will have a place in the armament for cervical cancer. TNAs against cervical cancer is in a dynamic state, and clinical trials will define the TNAs in preventive and therapeutic roles to control tumour growth, debulk tumour mass, prevent metastasis and facilitate immune interaction MH - Mexico|Distrito Federal MH - USA PB - LONDON: ASHLEY PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology;Medicine, Research & Experimental U5 - J;Review AV - English IS - 1471-2598 UR - ISI:000222981300006 L2 - antigene;antisense;aptamers;cervical cancer;human papillomavirus;papillomavirus;ribozymes;RNA interference;therapy;HUMAN-PAPILLOMAVIRUS TYPE-16; CARCINOMA CELL-LINES; DOUBLE-STRANDED-RNA; IN-VITRO SELECTION; C-RAF KINASE; ANTISENSE OLIGONUCLEOTIDES; MESSENGER-RNA; E6 ONCOPROTEIN; HAIRPIN RIBOZYMES; GENE-EXPRESSION SO - Expert Opinion on Biological Therapy 2004 ;4(8):1251-1264 10627 UI - 4103 AU - Dirksen RT AU - Avila G AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Biochem, Mexico City 07000, DF, MexicoUniv Rochester, Med Ctr, Dept Physiol & Pharmacol, Rochester, NY 14642, USAAvila, G, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Biochem, AP 14-740, Mexico City 07000, DF, Mexico TI - Distinct effects on Ca2+ handling caused by malignant hyperthermia and central core disease mutations in RyR1 AB - Malignant hyperthermia (MH) and central core disease (CCD) are disorders of skeletal muscle Ca2(+) homeostasis that are linked to mutations in the type 1 ryanodine receptor (RyR1). Certain RyR1 mutations result in an MH-selective phenotype (MH-only), whereas others result in a mixed phenotype (MH+CCD). We characterized effects on Ca2+ handling and excitation-contraction (EC) coupling of MH-only and MH+CCD mutations in RyR1 after expression in skeletal myotubes derived from RyR1-null (dyspedic) mice. Compared to wild-type RyR1-expressing myotubes, MH+CCD- and MH-only-expressing myotubes exhibited voltage-gated Ca2+ release (VGCR) that activated at more negative potentials and displayed a significantly higher incidence of spontaneous Ca2+ oscillations. However, maximal VGCR was reduced only for MH+CCD mutants (Y4795C, R2435L, and R2163H) in which spontaneous Ca2+ oscillations occurred with significantly longer duration (Y4795C and R2435L) or higher frequency (R2163H). Notably, myotubes expressing these MH+CCD mutations in RyR1 exhibited both increased [Ca2+](i) and reduced sarcoplasmic reticulum (SR) Ca2+ content. We conclude that MH-only mutations modestly increase basal release-channel activity in a manner insufficient to alter net SR Ca2+ content ("compensated leak''), whereas the mixed MH+CCD phenotype arises from mutations that enhance basal activity to a level sufficient to promote SR Ca2+ depletion, elevate [Ca2+](i), and reduce maximal VGCR ("decompensated leak'') MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 15 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000224732500024 L2 - RYANODINE-RECEPTOR GENE; SKELETAL-MUSCLE; RELEASE CHANNELS; CONGENITAL MYOPATHY; DIHYDROPYRIDINE RECEPTORS; INTRACELLULAR CALCIUM; SUSCEPTIBLE PIGS; CELLS; INDIVIDUALS; SENSITIVITY SO - Biophysical Journal 2004 ;87(5):3193-3204 10628 UI - 5528 AU - Dmitruk IM AU - Dmitruk NL AU - Basiuk E AU - Banuelos JG AU - Esparza A AU - Saniger JM AD - Kyiv Natl Taras Shevchenko Univ, Dept Expt Phys, UA-03022 Kiev, UkraineNatl Acad Sci, Inst Semicond Phys, UA-03028 Kiev, UkraineUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoDmitruk, IM, Kyiv Natl Taras Shevchenko Univ, Dept Expt Phys, UA-03022 Kiev, Ukraine TI - Optical characterization of fullerene films on flat and patterned semiconductor substrates AB - Comprehensive optical characterization Of C-60 films on semiconductor substrates has been performed by means of ellipsometry, Raman and photoluminescence spectroscopy. The films have been prepared by the sublimation Of C-60 in vacuum. The morphology of these films and the C-60-substrate interaction were investigated by atomic force microscopy. Both flat and patterned wafers of Si, Ge, and InP have been used as substrates. It was found formerly that the strong interaction occurs between C-60 molecules and Si surface, and the C-60 films on patterned InP surface grow with grains arrayed in [0 1 1] and [1 0 1] perpendicular directions. Initial optical characterization was performed by means of ellipsometry to determine thickness and optical constants of the films. Raman spectra have been measured at room temperature under argon laser excitation. It was shown to be very useful for structural characterization and estimation of stress. Observed increase of Raman signal from patterned samples and its possible connection with surface enhanced Raman scattering effect are under discussion. Raman spectra and low temperature photoluminescence provide information on dimer formation and polymerization. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0008-6223 UR - ISI:000221417400033 L2 - fullerene film;ellipsometry;Raman spectroscopy;photoluminescence;surface structure;EPITAXIAL-GROWTH; C-60 FILMS; MOLECULES; SURFACE; SILICON; MICA SO - Carbon 2004 ;42(5-6):1089-1093 10629 UI - 6694 AU - Doffinger R AU - Helbert MR AU - Barcenas-Morales G AU - Yang K AU - Dupuis S AU - Ceron-Gutierrez L AU - Espitia-Pinzon C AU - Barnes N AU - Bothamley G AU - Casanova JL AU - Longhurst HJ AU - Kumararatne DS AD - Addenbrookes Hosp, Dept Clin Biochem & Immunol, Cambridge CB2 2QQ, EnglandManchester Royal Infirm, Dept Immunol, Manchester M13 9WL, Lancs, EnglandSt Bartholomews Hosp, Dept Immunol, London, EnglandHomerton Univ Hosp, London, EnglandFac Med Necker Enfants Malad, INSERM, UR550, Paris, FranceUniv Nacl Autonoma Mexico, Fac Estudios Super Cuatitlan, Immunol Lab, Izcalli, MexicoInst Invest Biomed, Dept Immunol, Mexico City, DF, MexicoHosp Infantil Mexico Frederico Gomez, Mexico City, DF, MexicoDoffinger, R, Addenbrookes Hosp, Dept Clin Biochem & Immunol, Hills Rd, Cambridge CB2 2QQ, England TI - Autoantibodies to interferon-gamma in a patient with selective susceptibility to mycobacterial infection and organ-specific autoimmunity AB - We evaluated a patient with disseminated Mycobacterium tuberculosis and Mycobacterium chelonae infection, of which he died. He also developed autoimmune ( type I) diabetes and primary hypothyroidism. His serum contained a high titer of immunoglobulin G autoantibody to interferon-gamma ( IFN-gamma) capable of blocking in vitro responses to this cytokine by peripheral blood mononuclear cells from normal donors. These results suggest that autoantibodies to IFN-gamma can induce susceptibility to disseminated mycobacterial infection, which may be refractory to chemotherapy MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000187325000030 L2 - TUBERCULOSIS; ANTIBODIES; IMMUNITY; DISEASE; GENE SO - Clinical Infectious Diseases 2004 ;38(1):E10-E14 10630 UI - 5728 AU - Dolan BP AU - O'Connor D AU - Presnajder P AD - NUI, Dept Math Phys, Maynooth, Kildare, IrelandDublin Inst Adv Studies, Sch Theoret Phys, Dublin 8, IrelandCINVESTAV, Dept Fis, Mexico City 0730, DF, MexicoComenius Univ, Dept Theoret Phys, SK-84248 Bratislava, SlovakiaDolan, BP, NUI, Dept Math Phys, Maynooth, Kildare, Ireland TI - Fuzzy complex quadrics and spheres AB - A matrix algebra is constructed which consists of the necessary degrees of freedom for a finite approximation to the algebra of functions on the family of orthogonal grassmannians of real dimension 2N, known as complex quadrics. These matrix algebras contain the relevant degrees of freedom for describing truncations of harmonic expansions of functions on N-spheres. An Inonu-Wigner contraction of the quadric gives the co-tangent bundle to the commutative sphere in the continuum limit. It is shown how the degrees of freedom for the sphere can be projected out of a finite dimensional functional integral, using second-order Casimirs, giving a well-defined procedure for constructing functional integrals over fuzzy spheres of any dimension MH - Ireland MH - Mexico|Distrito Federal MH - Slovakia PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 9 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1029-8479 UR - ISI:000220812700055 L2 - field theories in higher dimensions;differential and algebraic geometry;non-commutative geometry;QUANTUM-FIELD THEORY; NONCOMMUTATIVE GEOMETRY; STAR-PRODUCTS; REGULARIZATION; CONSTRUCTION; PHYSICS; SPACES; CPN SO - Journal of High Energy Physics 2004 ;(2): 10631 UI - 4108 AU - Dominguez-Rodriguez JR AU - Chaparro-Huerta V AU - Hernandez-Flores G AU - Gomez-Contreras PC AU - Lerma-Diaz JM AU - Ortiz-Lazareno PC AU - Cervantes-Munguia R AU - Orbach-Arbouys S AU - Scott-Algara D AU - Cuellar AB AD - IMSS, Ctr Invest Biomed Occidente, Guadalajara, Jalisco, MexicoUniv Guadalajara, CUCS, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, CUALTOS, Guadalajara 44430, Jalisco, MexicoHop Paul Brousse, Serv Pharm, Villejuif, FranceInst Pasteur, Paris, FranceCuellar, AB, IMSS, Ctr Invest Biomed Occidente, AP 1-3838, Guadalajara, Jalisco, Mexico TI - In vivo adriamycin-induced apoptosis in peritoneal murine macrophages: Partial participation of a caspase cascade AB - Background: Adriamycin (ADM) is ad potent antitumor drug that induces apoptosis (AP) in tumor cells. AP is modulated by caspases and by mitogen-activated protein kinases (MAPK) as well as by the mitochondrial membrane potential (DeltaPsi(m)). We studied the participation of these systems in peritoneal macrophages from ADM-treated mice. Materials and Methods: Balb/c mice were either treated with ADM (5mg/kg, i.p.) or with 0.85% NaCl solution (controls). One hour later, peritoneal cells were harvested and cultured for 28 h. AP was evaluated by ethidium bromide and acridine orange staining; DeltaPsi(m) was monitored using a MitoCapture stain Kit; DNA integrity was assessed by electrophoretic analysis. Animals were treated (i.p.) I h before ADM administration with Z-LEHD-FMK Z-DEVD-FMK, or Z-VAD-FMK (caspase-9, caspases-3,7, 10 and general caspase inhibitors, respectively) or with PD169316 (a MAPK p38 inhibitor). Results: ADM induced a higher rate of AP and the characteristic electrophoretic DNA ladder pattern. Mice treated with caspases inhibitors plus ADM showed significant reductions in AP and DNA laddering, in contrast, no differences were observed in mice treated with PD169316 plus ADM in comparison with ADM alone. ADM also induced early loss of the DeltaPsi(m). Conclusion: In these experimental conditions, ADM induced AP in a mainly caspase-9-dependent manner and this was related to a reduction in the DeltaPsi(m) MH - France MH - Mexico|Jalisco PB - ATHENS: INT INST ANTICANCER RESEARCH RP - NOT IN FILE U3 - TC 3 U4 - Oncology U5 - J;Article AV - English IS - 0250-7005 UR - ISI:000224629700013 L2 - apoptosis;macrophages;adriamycin;caspases;p38 MAPK;PROGRAMMED CELL-DEATH; DNA TOPOISOMERASE-II; CHEMOTHERAPEUTIC-AGENTS; DOXORUBICIN; INHIBITION; ACTIVATION; PATHWAY; RAT; CARDIOMYOCYTES; MECHANISM SO - Anticancer Research 2004 ;24(5A):2689-2696 10632 UI - 6548 AU - Dominguez AM AU - Zarate A AU - Quijada R AU - Lopez T AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Chile, Fac Ciencias Fis & Matemat, Dept Ingn Quim, Santiago, ChileCtr Invest Interdisciplinaria Avanzada Ciencias Ma, Santiago, ChileQuijada, R, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, AP55-543, Mexico City 09340, DF, Mexico TI - Sol-gel iron complex catalysts supported on TiO2 for ethylene polymerization AB - The Fe((SO4)(2)(NH4)(2))/TiO2 compound was prepared via the sol-gel technique at pH 9 dried at 70degreesC and treated thermally at different calcination temperatures (200, 400, 600 and 800degreesC). It was characterized by BET, XPS and XRD and it was tested as a catalyst for ethylene polymerization. A strong dependence was found between the structural properties of the support, the iron complex and the annealing temperature. Catalytic activity decreased with increasing heat treatment temperature up to 400degreesC and remained practically constant above this temperature. These differences occurred without important changes in the physical, chemical and structural properties of the synthesized polymer. (C) 2003 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000187619300011 L2 - sol-gel;iron;titania;ethylene;polymerization;supported catalyst;TITANIA; LATTICE; SILICA SO - Journal of Molecular Catalysis A-Chemical 2004 ;207(2):155-161 10633 UI - 2578 AU - Domrachev GA AU - Selivanovskii DA AU - Domracheva EG AU - Domracheva LG AU - Lazarev AI AU - Stunzhas PA AU - Shishkanov SF AU - Vaks VL AD - Russian Acad Sci, Inst Organomet Chem, Nizhnii Novgorod, RussiaRussian Acad Sci, Inst Appl Phys, Nizhnii Novgorod, RussiaRussian Acad Sci, Inst Microstruct Phys, Nizhnii Novgorod, RussiaUniv Michoacana Nicolas Hidalgo, Morelia, Michoacan, MexicoRussian Acad Sci, PP Shirsov Inst Oceanol, Moscow, RussiaNizhnii Novgorod State Med Acad, Nizhnii Novgorod, RussiaDomrachev, GA, Russian Acad Sci, Inst Organomet Chem, Nizhnii Novgorod, Russia TI - The role of neutral defects in the structural chemistry of liquid water AB - For defective water associates with an extra hydrogen atom (n-defective associates), size and structure effects on ionization potentials compared to defectless (normal) associates of similar structures have been investigated by quantum chemical and molecular mechanics methods. The ionization potentials of small n defective water associates increase (from fractions of eV to 7 eV - 8 eV) with the number of water molecules in the associate. These are most probably the source of a hydrated electron that are responsible for the ensuing equilibrium between all defects in liquid water: neutral n and p defects and ion defects (H-aq(+), OHaq-, e(aq)(-)). Delocalization of an odd electron in defective associates stabilizes the latter and promotes their recombinations, forming hydrated water molecules, hydrogen peroxide, and gaseous hydrogen. Structural instability of "fallerene" (H2O)(20) relative to normal associates has been found. This compound is stabilized by the endo inclusion of a hydrogen atom, and exo fixation of the hydrogen atom gives rise to an extra source of hydrated electrons MH - Mexico|Michoacan MH - Russia PB - NEW YORK: CONSULTANTS BUREAU/SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4766 UR - ISI:000228403000011 L2 - defective neutral water associates;ionization potential;hydrated hydrogen atom;hydrated hydroxyl radical;hydrated electron;HYDRATED ELECTRON; CLUSTERS; SOUND SO - Journal of Structural Chemistry 2004 ;45(4):636-642 10634 UI - 4171 AU - Domrachev GA AU - Lazarev AI AU - Kaverin BS AU - Egorochkin AN AU - Ob'edkov AM AU - Domracheva EG AU - Domracheva LG AU - Markin GV AU - Nava EH AU - Sorokin AA AU - Suvorova ON AU - Karnatsevich VL AU - Kirillov AI AU - Zakurazhnov AA AD - Russian Acad Sci, Razuvaev Inst Organomet Chem, Nizhnii Novgorod 603950, RussiaUniv Michoacana San Nicolas de Hidalgo, Morelia, Michoacan, MexicoInst Technol, Morelia, Michoacan, MexicoDomrachev, GA, Russian Acad Sci, Razuvaev Inst Organomet Chem, Ul Tropinina 49, Nizhnii Novgorod 603950, Russia TI - The role of carbon and metal in self-assembly of the iron-carbon system at various component ratios AB - The problem of self-assembly in a metal-carbon system under dynamic conditions (equilibrium and nonequilibrium) is considered using the iron-carbon system as an example. It is proved theoretically and experimentally that the ratio of the components of the system affects the possibility of carbon self-assembly with the formation of fractal iron structures and of metal self-assembly with the participation of polyhapto derivatives of iron and the formation of fullerene-like carbon structures. (C) 2004 MAIK "Nauka / Interperiodica" MH - Mexico|Michoacan MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000224424700035 L2 - FULLERENE; DECOMPOSITION; STABILITY; C-60 SO - Physics of the Solid State 2004 ;46(10):1969-1983 10635 UI - 3729 AU - Dong SH AU - Chen CY AU - Lozada-Cassou M AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoYancheng Teachers Coll, Dept Phys, Yancheng 224002, Peoples R ChinaDong, SH, Inst Mexicano Petr, Programa Ingn Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Some recurrence relations among the radial matrix elements for the relativistic hydrogenic atoms AB - The general calculation formula for the matrix elements is derived. We present a very lengthy and complicated general recurrence relation among the matrix elements of r(k). Some useful recurrence relations among the matrix elements are studied in some special cases, which include the matrix elements of r(k) calculated in the same state \n'l'>, the different states \n'l'(1)> and \n'l'(2)>, and k = \l(1)-l(2)\ and k = l(1) + l(2) +1. On the basis of the integral properties of the product of two associated Laguerre polynomials multiplied by a weight factor, we obtain a new recurrence relation between the matrix elements and . Another recurrence relation involving the matrix elements of logarithmic functions In(2r/alpha'n') (alpha' = a(0)mc(2) /ZE(n)') is investigated. (C) 2004 Elsevier B.V All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000225474700003 L2 - matrix elements;relativistic Schrodinger equation;recurrence relations;ISOTROPIC HARMONIC-OSCILLATOR; EXPECTATION VALUES; FORMULA; STATES SO - Physics Letters A 2004 ;333(3-4):193-203 10636 UI - 4277 AU - Dorado F AU - Romero R AU - Canizares P AU - Romero A AD - Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13004, SpainUniv Autonoma Estado Mexico, Fac Quim, Toluca, Mexico, MexicoDorado, F, Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Campus Univ S-N, Ciudad Real 13004, Spain TI - Influence of palladium incorporation technique on n-butane hydroisomerization over HZSM-5/bentonite catalysts AB - The influence of palladium incorporation technique on hydroisomerization of n-butane over bifunctional Pd/HZSM-5 catalysts agglomerated with bentonite was studied to analyse the effect that it has on the catalytic activity. Temperature-programmed desorption of ammonia (TDPA), temperature-programmed reduction (TPR), atomic absorption (AA) spectroscopy, and surface area measurements were used to characterize the catalysts. Pd/HZSM-5/bentonite catalysts were prepared using the impregnation, ion exchange and solid-state ion exchange methods. The impregnated catalyst shows the highest activity. However, the catalysts prepared by solid-state ion exchange had the lowest catalytic activity. Probably, there is not a good mixture between the metal and zeolite for these samples, so that the conversion decreases. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000224218700010 L2 - zeolites;ion exchange;selectivity;homogenization;agglomeration;metals;PD/HZSM-5 CATALYSTS; ZEOLITE; EXCHANGE; DISPERSION SO - Applied Catalysis A-General 2004 ;274(1-2):79-85 10637 UI - 6322 AU - Dorina U AU - Jozsef S AU - Tamas F AU - Vilmos P AU - Eniko W AU - Bela L AD - MTA Allatorvos Tudomanyi Kutatointezet, H-1143 Budapest, HungaryOrszagos Allat Egeszsegugyi Intezet, H-1143 Budapest, HungaryUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, DPA, Mexico City 04510, DF, MexicoBela, L, MTA Allatorvos Tudomanyi Kutatointezet, Hungaria Krt 21, H-1143 Budapest, Hungary TI - Genetic analysis of pigeon paramyxovirus-1 strains isolated in Hungary AB - In 1981, in the Mediterranean region of Europe, a contagious disease resembling to Newcastle disease (ND) of poultry appeared among racing and other breeding pigeons. The causative agent was an antigenic variant of ND virus (NDV) of chickens, and it became known as pigeon paramyxovirus-1 (pPMV-1). Genetic analysis of 32 pPMV-1 strains isolated between 1983 and 2002 in Hungary (Table) was performed using restriction site distribution (Figure 1) and partial sequence evaluation of the fusion (F) protein gene (Figure 2). it has been established that pPMV-1 strains could be placed into a separate genetic lineage (VIb) of genotype VI NDV strains that also comprised early Middle East and African viruses. Pigeon PMV-1 isolates could be, however, assigned to three epidemiologically distinct subgroups: early European, North American and recent European. Outbreaks in the '80s were caused by viruses belonging to the first two subgroups, while those in the '90s were dominated by recent European strains both in Hungary and abroad. Genetic composition of isolates has indicated that local disease among pigeons was due to repeated introduction of contemporary strains from abroad, and reflected the distribution of pPMV-1 strains in Europe MH - Hungary MH - Mexico|Distrito Federal PB - BUDAPEST: MEZOGAZDA KIADO KFT RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - Hungarian IS - 0025-004X UR - ISI:000188419800008 L2 - DISEASE VIRUS-STRAINS; NEWCASTLE-DISEASE; PHYLOGENETIC ANALYSIS; TYPE-1 STRAINS; IDENTIFICATION; VIRULENCE; CHICKENS; PMV-1; PATHOGENICITY; OUTBREAKS SO - Magyar Allatorvosok Lapja 2004 ;126(1):39-47 10638 UI - 4607 AU - Dormans J AU - Burger M AU - Aguilar D AU - Hernandez-Pando R AU - Kremer K AU - Roholl P AU - Arend SM AU - Van Soolingen D AD - Natl Inst Publ Hlth & Environm, Diagnost Lab Infect Dis & Perinatal Screening, Mycobacterial Reference Dept, NL-3720 BA Bilthoven, NetherlandsNatl Inst Publ Hlth & Environm, Lab Toxicol Pathol & Genet, NL-3720 BA Bilthoven, NetherlandsLeiden Univ, Med Ctr, Dept Infect Dis, Leiden, NetherlandsNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Sect, Mexico City, DF, Mexicovan Soolingen, D, Natl Inst Publ Hlth & Environm, Diagnost Lab Infect Dis & Perinatal Screening, Mycobacterial Reference Dept, POB 1, NL-3720 BA Bilthoven, Netherlands TI - Correlation of virulence, lung pathology, bacterial load and delayed type hypersensitivity responses after infection with different Mycobacterium tuberculosis genotypes in a BALB/c mouse model AB - One of the most intriguing aspects of tuberculosis is that the outcome of an infection with M. tuberculosis (TB) is highly variable between individuals. The possibility of differences in virulence between M. tuberculosis strains or genotypes has only recently been studied. There is evidence of multifactorial genetic predisposition in humans that influences the susceptibility to tuberculosis. A better understanding of differences in virulence between M. tuberculosis genotypes could be important with regard to the efforts at TB control and the development of improved antituberculosis vaccines. Survival, lung pathology, bacterial load and delayed type hypersensitivity (DTH) responses of BALB/c mice after intratracheal infection with any of 19 different M. tuberculosis complex strains of 11 major genotype families were studied. The results indicate that among genetically different M. tuberculosis strains a very broad response was present with respect to virulence, pathology, bacterial load and DTH. 'Low'-responders were the H37Rv, Canetti, Beijing-1 strains, while Beijing-2,3, Africa-2 and Somalia-2 strains were 'high'-responders. A severe pathological response correlates with a high mortality and a high CFU counts in lungs, but poorly with the degree of the DTH response MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 15 U4 - Immunology U5 - J;Article AV - English IS - 0009-9104 UR - ISI:000223469800002 L2 - M. tuberculosis;pathology;genotypes;IS6110 RFLP typing;immunology;CFU;COMPLEX STRAINS; NITRIC-OXIDE; DISEASE; SUSCEPTIBILITY; RESISTANCE; CELLS; GENE; PATHOGENESIS; EPIDEMIOLOGY; IS6110 SO - Clinical and Experimental Immunology 2004 ;137(3):460-468 10639 UI - 5883 AU - Dornand J AU - Lafont V AU - Oliaro J AU - Terraza A AU - Castaneda-Roldan E AU - Liautard JP AD - Univ Montpellier 2, INSERM, U43, F-34095 Montpellier, FranceBenemerita Univ Autonoma Puebla, Inst Ciences, Puebla, MexicoDornand, J, Univ Montpellier 2, INSERM, U43, CP 100,Pl E Bataillon, F-34095 Montpellier, France TI - Impairment of intramacrophagic Brucella suis multiplication by human natural killer cells through a contact-dependent mechanism AB - Brucella spp. are facultative intracellular bacteria that can establish themselves and cause chronic disease in humans and animals. NK cells play a key role in host defense. They are implicated in an early immune response to a variety of pathogens. However, it was shown that they do not control Brucella infection in mice. On the other hand, NK cell activity is impaired in patients with acute brucellosis, and recently it was demonstrated that human NK cells mediate the killing of intramacrophagic Mycobacterium tuberculosis in in vitro infection. Therefore, we have analyzed the behavior of Brucella suis infecting isolated human macrophages in the presence of syngeneic NK cells. We show that (i) NK cells impair the intramacrophagic development of B. suis, a phenomenon enhanced by NK cell activators, such as interleukin-2; (ii) NK cells cultured in the presence of infected macrophages are highly activated and secrete gamma interferon and tumor necrosis factor alpha; (iii) impairment of bacterial multiplication inside infected cells is marginally associated with the cytokines produced during the early phase of macrophage-NK cell cocultures; (iv) direct cell-to-cell contact is required for NK cells to mediate the inhibition of B. suis development; and (v) inhibition of B. suis development results from an induction of NK cell cytotoxicity against infected macrophages. Altogether, these findings show that NK cells could participate early in controlling the intramacrophagic development of B. suis in humans. It seems thus reasonable to hypothesize a role for NK cells in the control of human brucellosis. However, by impairing the activity of these cells in the acute phase of the illness, the pathogen should avoid this control MH - France MH - Mexico|Puebla PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000220481600053 L2 - COMPLEX CLASS-I; INTRACELLULAR MYCOBACTERIUM-TUBERCULOSIS; V-GAMMA-9V-DELTA-2 T-CELLS; DENDRITIC CELLS; NK CELLS; MEDIATED CYTOTOXICITY; SURFACE EXPRESSION; INTERFERON-GAMMA; IMMUNE-RESPONSE; EFFECTOR CELL SO - Infection and Immunity 2004 ;72(4):2303-2311 10640 UI - 5575 AU - dos Santos AB AU - Bisschops IAE AU - Cervantes FJ AU - van Lier JB AD - Univ Wageningen & Res Ctr, Subdept Environm Technol, NL-6700 EV Wageningen, NetherlandsLettinga Associates Fdn, NL-6700 AM Wageningen, NetherlandsInst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85000, Sonora, Mexicodos Santos, AB, Univ Wageningen & Res Ctr, Subdept Environm Technol, Bomenweg 2,POB 8129, NL-6700 EV Wageningen, Netherlands TI - Effect of different redox mediators during thermophilic azo dye reduction by anaerobic granular sludge and comparative study between mesophilic (30 degrees C) and thermophilic (55 degrees C) treatments for decolourisation of textile wastewaters AB - The impact of different redox mediators on colour removal of azo dye model compounds and textile wastewater by thermophilic anaerobic granular sludge (55 degreesC was investigated in batch assays. Additionally, a comparative study between mesophilic (30 degreesC and thermophilic (55 degreesC colour removal was performed with textile wastewater, either in the presence or absence of a redox mediator. The present work clearly evidences the advantage of colour removal at 55 degreesC compared with 30 degreesC when dealing with azo coloured wastewaters. The impact of the redox mediators anthraquinone-2,6-disulfonate (AQDS), anthraquinone-2-sulfonate (AQS) and riboflavin was evident with all dyes, increasing decolourisation rates up to 8-fold compared with the mediator-free incubations. The generation of the hydroquinone form AH(2)QDS, i.e. the reduced form of AQDS, was extremely accelerated at 55 degreesC compared with 30 degreesC. Furthermore, no lag-phase was observed at 55 degreesC. Based on the present results we postulate that the production/transfer of reducing equivalents was the process rate-limiting step, which was accelerated by the temperature increase. It is conclusively stated that 55 degreesC is a more effective temperature for azo dye reduction than 30 degreesC which on the one hand can be attributed to the faster production/transfer of reducing equivalents, but also to the decrease in activation energy requirements. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Sonora MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 17 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0045-6535 UR - ISI:000221212700001 L2 - azo dye;colour removal;thermophilic;mesophilic;anaerobic;redox mediator;textile wastewater;WASTE-WATER; DEGRADATION; CONSORTIA; TOXICITY; REACTOR; CARBON; BN6 SO - Chemosphere 2004 ;55(9):1149-1157 10641 UI - 5907 AU - dos Santos AB AU - Cervantes FJ AU - van Lier JB AD - Univ Wageningen & Res Ctr, Subdept Environm Technol, NL-6700 EV Wageningen, NetherlandsInst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85000, Sonora, Mexicodos Santos, AB, Univ Wageningen & Res Ctr, Subdept Environm Technol, Bomenweg 2,POB 8129, NL-6700 EV Wageningen, Netherlands TI - Azo dye reduction by thermophilic anaerobic granular sludge, and the impact of the redox mediator anthraquinone-2,6-disulfonate (AQDS) on the reductive biochemical transformation AB - Azo dye reduction at 55degreesC by thermophilic anaerobic granular sludge was investigated distinguishing between the biotic and abiotic mechanisms. The impact of the redox mediator anthraquinone-2,6-disulfonate (AQDS) on colour removal and co-substrate oxidation was also investigated. Metabolic activities of the thermophilic inoculum induced a fast azo dye reduction and indicated a biotic predominance in the process. The addition of co-substrate enhanced the decolourisation rates 1.7-fold compared with the bottles free of co-substrate. Addition of AQDS together with co-substrate enhanced the k value 1.5-fold, compared with the incubation containing co-substrate in the absence of AQDS. During a comparative study between sludge samples incubated under mesophilic (30degreesC) and thermophilic (55degreesC) conditions, the decolourisation rate at 55degreesC reached values up to sixfold higher than at 30degreesC. Biological treatment at 55degreesC showed a fast initial generation of reducing compounds via co-substrate oxidation, with AQDS increasing the azo dye reduction rate in all the incubations tested. Nevertheless, high concentrations of AQDS showed severe inhibition of thermophilic acetate and propionate oxidation and methane production rates. These promising results indicate that there may be good prospects for thermophilic anaerobic treatment of other reductive transformations such as reduction of nitroaromatics and dehalogenation MH - Mexico|Sonora MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000220519600008 L2 - SP STRAIN BN6; METHANOGENIC SLUDGE; DEGRADATION; BACTERIA; DECOLORIZATION; REDUCTASES; FE(III); SYSTEM; ACID SO - Applied Microbiology and Biotechnology 2004 ;64(1):62-69 10642 UI - 4994 AU - Dostal J AU - Keppie JD AU - Macdonald H AU - Ortega-Gutierrez F AD - St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoDostal, J, St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, Canada TI - Sedimentary origin of calcareous intrusions in the similar to 1 Ga Oaxacan Complex, southern Mexico: Tectonic implications AB - Intrusive calcareous bodies, marbles and calc-silicate rocks, are a distinctive feature of the high-grade metamorphic suites of the similar to1 Ga northern Oaxacan Complex. They typically form dike-like intrusions up to 4 in thick which cut across the surrounding high-grade granulite- and upper-amphibolite faeies metamorphic rocks. Various protoliths are possible for these carbonate bodies: (1) sediments including evaporites; (2) metasomatic skarns; and (3) carbonatites. An evaporitic protolith is supported by the predominance of scapolite, low abundances of incompatible trace elements (including Nb and rare-earth elements) relative to carbonatites, and the presence of a sharp contact with host rocks without a significant contact metamorphic aureole or fenitization. It is inferred that limestones and related rocks were remobilized under granulite-facies conditions and intruded into the host rocks. The widespread distribution of such evaporites in the Oaxacan Complex is consistent with deposition after the worldwide similar to1.3 Ga oxygenation event that increased the marine sulfate reservoir. Intrusion of rift-related plutons into the sediments at similar to1.157-1130 Ma provides a younger limit on the age of protholiths of the metamorphic suites. Modern analogues for such evaporites are rifts associated with passive margins (e.g., Red Sea) and active margins (e.g., Gulf of California). The presence of evaporites implies a paleolatitude of 10-35degrees, a conclusion consistent with a paleogeographic provenence for the Oaxacan Complex adjacent to either Amazonia or eastern Laurentia in Rodinia reconstructions MH - Canada MH - Mexico|Distrito Federal PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 3 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000222487100003 L2 - GEOCHEMISTRY; EVAPORITES; EVENTS; SERIES; MARGIN SO - International Geology Review 2004 ;46(6):528-541 10643 UI - 4341 AU - Doytcheva M AU - Kaiser M AU - Verheijen MA AU - Reyes-Reyes M AU - Terrones M AU - de Jonge N AD - Philips Res Labs, Philips Elect, NL-5656 AA Eindhoven, NetherlandsIPIC&T, San Luis Potosi 78216, SLP, Mexicode Jonge, N, Philips Res Labs, Philips Elect, Prof Holstlaan 4 WY-41, NL-5656 AA Eindhoven, Netherlands TI - Electron emission from individual nitrogen-doped multi-walled carbon nanotubes AB - This report describes the measurements on individual nitrogen-doped multi-walled carbon nanotubes mounted on tungsten support tips. Both the current-voltage characteristics and the energy spectrum of the emitted electron beam revealed field emission behavior similar to that shown for the best metallic emitters. The experimental results correspond with numerical calculations based on electron microscopy images of the nanotubes. The work function was derived and amounted to 5.0 eV. Finally, it is shown that the emission process is highly sensitive to small amounts of impurities deposited on the surface of the nanotube. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000223972300023 L2 - FIELD-EMISSION; BRIGHTNESS; TIPS SO - Chemical Physics Letters 2004 ;396(1-3):126-130 10644 UI - 3690 AU - Draayer JP AU - Popa G AU - Hirsch JG AU - Vargas CE AD - Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70808, USARochester Inst Technol, Dept Phys, Rochester, NY 14623, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Veracruzana, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, MexicoDraayer, JP, Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70808 USA TI - E2 & M1 strengths in deformed nuclei: Application of the pseudo-SU(3) model AB - An application of the pseudo-SU(3) shell-model to Dy-162 illustrates that complex many-body behavior in atomic nuclei can be given a simple geometrical interpretation MH - USA MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - BEIJING: SCIENCE CHINA PRESS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0254-3052 UR - ISI:000225727900010 L2 - pseudo-SU(3) model;low-lying levels;electro-magnetic transitions;SCISSORS MODE; MICROSCOPIC DESCRIPTION; ODD; SCATTERING; STATES; GD-156 SO - High Energy Physics and Nuclear Physics-Chinese Edition 2004 ;28(12):1297-1301 10645 UI - 6109 AU - Draud M AU - ias-Ordonez R AU - Verga J AU - Itzkowitz M AD - CW Post Long Isl Univ, Dept Biol, Brookville, NY 11548, USAInst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoLehigh Univ, Dept Biol, Bethlehem, PA 18015, USADraud, M, CW Post Long Isl Univ, Dept Biol, Brookville, NY 11548, USA TI - Female and male Texas cichlids (Herichthys cyanoguttatum) do not fight by the same rules AB - Selection usually acts differently on males and females during intrasexual competition for resources and/or mates. Nevertheless, agonistic behavior has been examined both theoretically and empirically mostly in males. Our research questions whether males and females follow the same rules of engagement in intrasexual contests as predicted by the sequential assessment model (SAM). The SAM predicts negative correlations between contest intensity and duration and the magnitude of asymmetry in resource holding power (RHP) between the contestants, such that the most escalated contests are those between similarly endowed individuals. We staged male and female intrasexual contests with varying degrees of body size asymmetry under a round robin design using the monogamous Texas cichlid fish (Herichthys cyanoguttatum) as a study case. We used Mantel's matrix analysis to compare how the behavioral content, duration, structure, and outcome of male and female contests were affected by the relative body size of the contestants. In the case of males, relative size in each contest predicted outcome, duration, and frequency of conventional and escalated behaviors according to prevailing theory. Female contest structure and outcome, however, were not predicted by the relative size of contestants. We discuss our results in terms of other asymmetries that might be important in structuring female contests, and we propose potential approaches to study female-female aggression MH - Mexico|Veracruz MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 1045-2249 UR - ISI:000189345400012 L2 - behavioral sex dimorphism;body size asymmetry;fight theory;Herichthys cyanoguttatum;intrasexual contests;Mantel test;sequential assessment;Texas cichlids;RESOURCE HOLDING POWER; SEQUENTIAL ASSESSMENT; PUMPKINSEED SUNFISH; FICEDULA-HYPOLEUCA; SEXUAL SELECTION; BEHAVIOR; AGGRESSION; COMPETITION; CONTESTS; ASYMMETRIES SO - Behavioral Ecology 2004 ;15(1):102-108 10646 UI - 4679 AU - Drautz R AU - az-Ortiz A AU - Fahnle M AU - Dosch H AD - Max Planck Inst Met Res, D-70569 Stuttgart, GermanyCNRS IPICyT, Natl Supercomp Ctr, Tangamanga 78231, San Luis Potosi, MexicoDrautz, R, Max Planck Inst Met Res, Heisenbergstr 3, D-70569 Stuttgart, Germany TI - Ordering and magnetism in Fe-Co: Dense sequence of ground-state structures AB - We discover that Fe-Co alloys develop a series of ordered ground-state structures in addition to the known CsCl-type structure. This new set of structures is found from a combinatorial ground-state search of 1.5x10(10) bcc-based structures. The energies of the searched bcc structures are constructed with the cluster expansion method from few first-principles calculations of ordered Fe-Co structures. The set of new ground-state structures is explained from the decay behavior of the cluster expansion coefficients which allows us to identify a simple geometric motif common to all structures. The appearance of these FeCo superstructures offers a broader view of the ordering reactions in bipartite-lattice based binary alloys MH - Germany MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000223138200046 L2 - STABILITY; IRON SO - Physical Review Letters 2004 ;93(6): 10647 UI - 4596 AU - Du GG AU - Avila G AU - Sharma P AU - Khanna VK AU - Dirksen RT AU - MacLennan DH AD - Univ Toronto, Banting & Best Dept Med Res, Charles H Best Inst, Toronto, ON M5G 1L6, CanadaInst Politecn Nacl, CINVESTAV, Dept Biochem, Mexico City 07000, DF, MexicoUniv Rochester, Med Ctr, Dept Physiol & Pharmacol, Rochester, NY 14642, USAMacLennan, DH, Univ Toronto, Banting & Best Dept Med Res, Charles H Best Inst, 112 Coll St, Toronto, ON M5G 1L6, Canada TI - Role of the sequence surrounding predicted transmembrane helix M4 in membrane association and function of the Ca2+ release channel of skeletal muscle sarcoplasmic reticulum (ryanodine receptor isoform 1) AB - The role of the sequence surrounding M4 in ryanodine receptors (RyR) in membrane association and function was investigated. This sequence contains a basic, 19-amino acid M3/M4 loop, a hydrophobic 44 - 49 amino acid sequence designated M4 ( or M4a/M4b), and a hydrophilic M4/M5 loop. Enhanced green fluorescent protein (EGFP) was inserted into RyR1 and truncated just after the basic sequence, just after M4, within the M4/M5 loop, just before M5 and just after M5. The A52 epitope was inserted into RyR2 and truncated just after M4a. Analysis of these constructs ruled out a M3/M4 transmembrane hairpin and narrowed the region of membrane association to M4a/M4b. EGFP inserted between M4a and M4b in full-length RyR2 was altered conformationally, losing fluorescence and gaining trypsin sensitivity. Although it was accessible to an antibody from the cytosolic side, tryptic fragments were membrane-bound. The expressed protein containing EGFP retained caffeine-induced Ca2+ release channel function. These results suggest that M4a/M4b either forms a transmembrane hairpin or associates in an unorthodox fashion with the cytosolic leaflet of the membrane, possibly involving the basic M3/M4 loop. The expression of a mutant RyR1, Delta4274-4535, deleted in the sequence surrounding both M3 and M4, restored robust, voltage-gated L-type Ca2+ currents and Ca2+ transients in dyspedic myotubes, demonstrating that this sequence is not required for either orthograde ( DHPR activation of sarcoplasmic reticulum Ca2+ release) or retrograde ( RyR1 increase in DHPR Ca2+ channel activity) signals of excitation-contraction coupling. Maximal amplitudes of L-currents and Ca2+ transients with Delta4274-4535 were larger than with wild-type RyR1, and voltage-gated sarcoplasmic reticulum Ca2+ release was more sensitive to activation by sarcolemmal voltage sensors. Thus, this region may act as a negative regulatory module that increases the energy barrier for Ca2+ release channel opening MH - Canada MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000223554600048 L2 - DEPENDENT K+ CHANNEL; MOLECULAR-CLONING; P-GLYCOPROTEIN; MUTATIONS; PROTEINS; TOPOLOGY; CONSEQUENCES; SENSITIVITY; CAFFEINE; SEGMENTS SO - Journal of Biological Chemistry 2004 ;279(36):37566-37574 10648 UI - 5553 AU - Dubey JP AU - Morales ES AU - Lehmann T AD - ARS, USDA, Anim & Nat Resources Inst, Anim Parasit Dis Lab, Beltsville, MD 20705, USACtr Dis Control & Prevent, Div Parasit Dis, Atlanta, GA 30341, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zooten, Dept Patol, Mexico City 04510, DF, MexicoDubey, JP, ARS, USDA, Anim & Nat Resources Inst, Anim Parasit Dis Lab, Bldg 1001, Beltsville, MD 20705 USA TI - Isolation and genotyping of Toxoplasma gondii from free-ranging chickens from Mexico AB - The prevalence of Toxoplasma gondii in free-ranging chickens is a good indicator of the presence of T. gondii oocysts in the environment because chickens feed from the soil. In the present study, prevalence of T. gondii in 208 free-range chickens (Gallus domesticus) from Mexico was investigated. Blood, heart, and brain from each animal were obtained to test for T. gondii infection. Antibodies to T gondii, assayed with the modified agglutination test (1:10 or higher), were found in 13 (6.2%) chickens. Hearts and brains of 13 seropositive chickens were bioassayed in mice, and T. gondii was isolated from 6 chickens. All 6 isolates were avirulent for mice. Genotyping of chicken isolates of T. gondii using the SAG2 locus indicated that 5 were type III and 1 was type I. This is the first report of isolation of T. gondii from chickens from Mexico MH - USA MH - Mexico|Distrito Federal PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 18 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000221351800032 L2 - BRAZIL SO - Journal of Parasitology 2004 ;90(2):411-413 10649 UI - 4387 AU - Ducea MN AU - Valencia VA AU - Shoemaker S AU - Reiners PW AU - DeCelles PG AU - Campa MF AU - Moran-Zenteno D AU - Ruiz J AD - Univ Arizona, Dept Geosci, Tucson, AZ 85721, USAYale Univ, Dept Geol & Geophys, New Haven, CT 06520, USAUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoDucea, MN, Univ Arizona, Dept Geosci, Tucson, AZ 85721, USA TI - Rates of sediment recycling beneath the Acapulco trench: Constraints from (U-Th)/He thermochronology AB - [1] The Sierra Madre del Sur mountain range is an uplifted forearc associated with the subduction of the Cocos plate along the Acapulco trench beneath mainland southern Mexico. The shallow subduction angle, the truncation of geologic features along the modern Acapulco trench, and direct seismic and drill hole observations in the trench through deep sea drilling data suggest that subduction erosion is an important process during the evolution of this margin. Turbidites derived from the uplifted forearc are the predominant sedimentary input into this trench, while pelagic sediments are subordinate. Apatite (U-Th)/He ages were obtained on 23 samples from two transects across the Sierra Madre del Sur ( Acapulco and Puerto Escondido) and reveal slow cooling during the Miocene. (U-Th)/He ages range between similar to 25 and 8 Ma and correlate inversely with elevation. Long-term erosional exhumation rates inferred from these ages range from 0.11 to 0.33 km/m.y., with higher rates in the range core, and suggest that the Sierra Madre del Sur has been a slowly decaying mountain range, since at least the early Miocene. Apparent Miocene-Pliocene sedimentation ("preservation'') rates in the Acapulco trench derived from Deep Sea Drilling Project data are about an order of magnitude smaller than the Miocene forearc erosion rates estimated from (U-Th)/He ages, suggesting that the terrigenous input to the trench was almost entirely recycled via subduction erosion, at least during the Miocene. The Miocene subducted flux per unit length of the margin is about 30 km(3)/(km m.y.), or a subducted volume per unit time of 44 x 10(3) km(3)/m.y., when integrated over the length of the trench MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000224127200005 L2 - (U-Th)/He thermochronology;Acapulco trench;subduction erosion;DRILLING PROJECT LEG-66; MIDDLE AMERICA TRENCH; MEXICAN VOLCANIC BELT; SUBDUCTION EROSION; SOUTHERN MEXICO; SOUTHWESTERN MEXICO; CONTINENTAL-CRUST; ZIRCON GEOCHRONOLOGY; CENOZOIC DENUDATION; CONVERGENT MARGIN SO - Journal of Geophysical Research-Solid Earth 2004 ;109(B9): 10650 UI - 3673 AU - Duda Y AU - Pizio O AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoNatl Acad Sci, Inst Condensed Matter Phys, Lvov, UkraineMarie Curie Sklodowska Univ, Dept Modeling Physicochem Processes, Lublin, PolandPizio, O, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Nonadditive binary hard sphere mixture in disordered hard sphere matrices: Integral equations and computer simulation AB - We have studied adsorption of nonadditive binary symmetric hard sphere mixtures in hard sphere matrices and in templated hard sphere matrices. Adsorption is described by using replica Ornstein-Zernike integral equations complemented by Martynov-Sarkisov closure relations. This theory permits straightforward calculation of the chemical potential of fluid species and to describe equilibrium between the bulk phase in a model adsorbent body. Theoretical results for adsorption isotherms agree well with Monte Carlo computer simulation data. On the other hand, we have captured the effect of matrix modification on adsorption via templating. Finally, we have described the coexistence curve (in terms of concentration vs density and in terms of concentration vs chemical potentials of fluid species) for the demixing transition by using theoretical procedure and by semigrand computer simulation in hard sphere matrices and in corresponding templated matrices. We have shown that the explanation of the phase behavior is intrinsically related to the trends of adsorption of the model fluid in such disordered adsorbents MH - Mexico|Distrito Federal MH - Poland MH - Ukraine PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000225695100057 L2 - ORNSTEIN-ZERNIKE EQUATIONS; TEMPLATED POROUS MATERIAL; FLUID-FLUID; MONTE-CARLO; PHASE-TRANSITIONS; RANDOM-MEDIA; ADSORPTION; LIQUID; AEROGEL; EQUILIBRIUM SO - Journal of Physical Chemistry B 2004 ;108(50):19442-19450 10651 UI - 5048 AU - Duenas Z AU - Rivera JC AU - Quiroz-Mercado H AU - Aranda J AU - Macotela Y AU - de Oca M AU - Lopez-Barrera F AU - Nava G AU - Guerrero JL AU - Suarez A AU - De Regil M AU - de la Escalera GM AU - Clapp C AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Queretaro 76230, MexicoHosp Luis Sanchez Bulnes, APEC, Mexico City, DF, MexicoFdn Univ Boyaca, Tunja, ColombiaClapp, C, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla,Km 15 Carretera Qro-SLP, Queretaro 76230, Mexico TI - Prolactin in eyes of patients with retinopathy of prematurity: Implications for vascular regression AB - PURPOSE. Disruption of the anti-angiogenic environment of the retina leads to neovascular eye diseases, including retinopathy of prematurity (ROP). Prolactin (PRL), the hormone originally associated with milk secretion, is proteolytically processed to 16K-PRL, a fragment with potent antiangiogenic, proapoptotic effects. Whether 16K-PRL is produced in eyes of patients with ROP and promotes the regression of intraocular blood vessels associated with this disease was investigated. METHODS. PRL was quantified in the aqueous humor, subretinal fluid, and serum from patients with stage 5 ROP and in patients with non-neovascular eye disorders. Intraocular expression of PRL was evaluated by RT-PCR, in situ hybridization, and Western blot analysis. AntiPRL antibodies were injected intravitreously in neonatal rats, and apoptosis of hyaloid vessels determined by TUNEL and ELISA. RESULTS. PRL was elevated in ocular fluids and serum from ROP patients. There was no correlation between PRL in ocular fluids and its level in serum, whereas PRL in aqueous humor and subretinal fluid were significantly correlated. PRL mRNA was expressed in blood vessels and leukocytes within retrolental fibrovascular membranes of ROP patients, and these membranes contained a 16 kDa immunoreactive PRL. The 16K-PRL isoform was more concentrated in subretinal fluid than in serum and was generated from PRL by subretinal fluid proteases. Intravitreous injection of neutralizing antiPRL antibodies inhibited the apoptosis of hyaloid vessels in neonatal rats. CONCLUSIONS. 16K-PRL derived from PRL internalized from the circulation or synthesized intraocularly can stimulate apoptosis-induced vascular regression and contribute to the development and progression of ROP MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 13 U4 - Ophthalmology U5 - J;Article AV - English IS - 0146-0404 UR - ISI:000222367900001 L2 - ENDOTHELIAL GROWTH-FACTOR; PROLIFERATIVE DIABETIC-RETINOPATHY; NEUROHYPOPHYSEAL SYSTEM; 16-KDA PROLACTIN; PRETERM INFANTS; VITREOUS LEVELS; HYALOID ARTERY; 16K PROLACTIN; FACTOR-I; RAT SO - Investigative Ophthalmology & Visual Science 2004 ;45(7):2049-2055 10652 UI - 5327 AU - Dufty JW AU - Baskaran A AU - Zogaib L AD - Univ Florida, Dept Phys, Gainesville, FL 32611, USAIst Tecnol Autonoma Mexico, Dept Matemat, Mexico City, DF, MexicoDufty, JW, Univ Florida, Dept Phys, Gainesville, FL 32611, USA TI - Gaussian kinetic model for granular gases AB - A kinetic model for the Boltzmann equation is proposed and explored as a practical means to investigate the properties of a dilute granular gas. It is shown that all spatially homogeneous initial distributions approach a universal "homogeneous cooling solution" after a few collisions. The homogeneous cooling solution (HCS) is studied in some detail and the exact solution is compared with known results for the hard sphere Boltzmann equation. It is shown that all qualitative features of the HCS, including the nature of overpopulation at large velocities, are reproduced by the kinetic model. It is also shown that all the transport coefficients are in excellent agreement with those from the Boltzmann equation. Also, the model is specialized to one having a velocity independent collision frequency and the resulting HCS and transport coefficients are compared to known results for the Maxwell model. The potential of the model for the study of more complex spatially inhomogeneous states is discussed MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000221813100019 L2 - INELASTIC MAXWELL MODELS; UNIFORM SHEAR-FLOW; LOW-DENSITY; ENSKOG EQUATION; DYNAMICS; STATE SO - Physical Review e 2004 ;69(5): 10653 UI - 5920 AU - Dumitrica T AU - Garcia ME AU - Jeschke HO AU - Yakobson BI AD - Free Univ Berlin, Inst Theoret Phys, D-1000 Berlin, GermanyRice Univ, Ctr Nanoscale Sci & Technol, Houston, TX 77251, USAIPICYT, Adv Mat Dept, San Luis Potosi 78216, MexicoRutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854, USADumitrica, T, Free Univ Berlin, Inst Theoret Phys, Arnimallee 14, D-1000 Berlin, Germany TI - Selective cap opening in carbon nanotubes driven by laser-induced coherent phonons AB - We demonstrate the possibility of a selective nonequilibrium cap opening of carbon nanotubes as a response to femtosecond laser excitation. By performing molecular dynamics simulations based on a microscopic electronic model we show that the laser-induced ultrafast structural changes differ dramatically from the thermally induced dimer emission. Ultrafast bond weakening and simultaneous excitation of two coherent phonon modes of different frequencies, localized in the spherical caps and cylindrical nanotube body, are responsible for the selective cap opening MH - Germany MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000220344400048 L2 - FRAGMENTATION; C-60 SO - Physical Review Letters 2004 ;92(11): 10654 UI - 5482 AU - Dumonteil E AU - Gourbiere S AD - Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Parasitol Lab, Merida 97000, Yucatan, MexicoUniv Perpignan, Lab Theorie Syst, F-66860 Perpignan, FranceDumonteil, E, Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Parasitol Lab, Ave Itzaes 490 & 59, Merida 97000, Yucatan, Mexico TI - Predicting Triatoma dimidiata abundance and infection rate: A risk map for natural transmission of Chagas disease in the Yucatan Peninsula of Mexico AB - Chagas disease, a major public health problem in Latin America, is caused by the protozoan parasite Trypanosoma cruzi and transmitted by hematophageous insects from the Triatominae subfamily. Control of this disease is based on domestic vector control with insecticides and improvements in housing. As with other vector-borne diseases, the identification of areas of high risk of disease transmission is a major prerequisite for the planning and implementation of cost-effective control programs. In this study, we explored the relationship between Triatoma dimidiata geographic distribution and bioclimatic factors in the Yucatan peninsula in Mexico, using geographic information systems, and developed predictive models of T. dimidiata domestic abundance and of its infection rates by T. cruzi. These predictions were then used to build the first natural transmission risk map for Chagas disease in the Yucatan peninsula, a tool that should prove very valuable for the implementation of effective vector control programs in the region MH - France MH - Mexico|Yucatan PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 13 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000221549700008 L2 - GEOGRAPHIC INFORMATION-SYSTEMS; TRYPANOSOMA-CRUZI; SATELLITE IMAGERY; IXODES-SCAPULARIS; UNITED-STATES; LYME-DISEASE; COSTA-RICA; KALA-AZAR; REDUVIIDAE; HEMIPTERA SO - American Journal of Tropical Medicine and Hygiene 2004 ;70(5):514-519 10655 UI - 5242 AU - Dunlop JS AU - Mclure RJ AU - Yamada T AU - Kajisawa M AU - Peacock JA AU - Mann RG AU - Hughes DH AU - Aretxaga I AU - Muxlow TWB AU - Richards AMS AU - Dickinson M AU - Ivison RJ AU - Smith GP AU - Smail I AU - Serjeant S AU - Almaini O AU - Lawrence A AD - Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandNatl Astron Observ, Tokyo 1818588, JapanINAOE, Puebla 72000, MexicoUniv Manchester, MERLIN VLBI Natl Facil, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandSpace Telescope Sci Inst, Baltimore, MD 21218, USARoyal Observ, UK ATC, Edinburgh EH9 3HJ, Midlothian, ScotlandUniv Durham, Dept Phys, Durham DH1 3LE, EnglandUniv Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NZ, Kent, EnglandDunlop, JS, Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland TI - Discovery of the galaxy counterpart of HDF 850.1, the brightest submillimetre source in the Hubble Deep Field AB - Despite extensive observational efforts, a convincing optical/infrared identification of the brightest submm source in the Hubble Deep Field, HDF 850.1, has remained elusive after almost four years. This failure is all the more notable given the availability of supporting multifrequency data of unparalleled depth, and subarcsec positional accuracy for the submm/mm source. Consequently, HDF 850.1 has become a test case for the possibility that the most violently star-forming objects in the Universe are too red and/or distant to be seen in the deepest optical images. Here we report the discovery of the galaxy counterpart of HDF 850.1. This object has been revealed by careful analysis of a new, deep K' image of the HDF obtained with the Subaru 8.2-m telescope. Its reality is confirmed by a similar analysis of the HST NICMOS F160W image of the same region. This object is extremely faint (K similar or equal to 23.5), clumpy (on subarcsec scales) and very red (I - K > 5.2; H - K = 1.4 +/- 0.35). The likelihood that it is the correct galaxy counterpart is strongly reinforced by a reanalysis of the combined MERLIN+VLA 1.4-GHz map of the field, which provides a new radio detection of HDF 850.1 only 0.1 arcsec from the new near-infrared counterpart, and with sufficient positional accuracy to exclude all previously considered alternative optical candidates. We have calculated new confidence limits on the estimated redshift of HDF 850.1 in the light of the new radio detection, and find z = 4.1 +/- 0.5. We have also determined the scalelength, and hence estimated the mass of the apparently nearby (0.5 arcsec distant) z similar or equal to 1 elliptical galaxy 3-586.0. From this we calculate that the flux density of HDF 850.1 has been boosted by a factor of similar or equal to3 through gravitational lensing by this intervening elliptical, consistent with predictions that a small but significant fraction of blank-field submm sources are lensed by foreground galaxies. We discuss the wider implications of these results for the submm population and cosmic star formation history MH - United Kingdom MH - Japan MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221913200006 L2 - galaxies : evolution;galaxies : formation;galaxies : starburst;cosmology : observations;infrared : galaxies;PARKES SELECTED REGIONS; X-RAY SOURCES; SPACE-TELESCOPE; PHOTOMETRIC REDSHIFTS; INFRARED OBSERVATIONS; ELLIPTIC GALAXIES; SPECTRAL INDEX; RADIO GALAXIES; STAR-FORMATION; NORTH SURVEY SO - Monthly Notices of the Royal Astronomical Society 2004 ;350(3):769-784 10656 UI - 5456 AU - Dunn MJ AU - Jimenez JL AU - Baumgardner D AU - Castro T AU - McMurry PH AU - Smith JN AD - Natl Ctr Atmospher Res, Adv Study Program, Boulder, CO 80307, USAUniv Colorado, Dept Chem, Boulder, CO 80309, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv Minnesota, Dept Mech Engn, Minneapolis, MN, USANatl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USADunn, MJ, Natl Ctr Atmospher Res, Adv Study Program, POB 3000, Boulder, CO 80307 USA TI - Measurements of Mexico City nanoparticle size distributions: Observations of new particle formation and growth AB - Continuous measurements of the size distribution of atmospheric aerosol in the 3-48 nm diameter range were performed in the Mexico City metropolitan area. These measurements were made during the period 10-20 April 2003 at a ground-based, mountain pass site in the southeast corner of the Mexico City Federal District and during the period 2-11 May 2003 at the CENICA site located near the city center. The objectives of this work were to determine the frequency of new particle formation and to characterize the atmospheric chemical and meteorological conditions that lead to these events. Several new particle formation events were recorded during the study. Events observed in the mountain pass correlate with northerly winds and elevated levels of sulfur dioxide in the mid-morning while events observed in the city correlate with elevated concentrations of sulfur dioxide and low particulate matter mass concentrations in the afternoon hours MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 12 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000221609800003 L2 - AIR; GAS SO - Geophysical Research Letters 2004 ;31(10): 10657 UI - 4351 AU - Durazo-Beltran E AU - Viana MT AU - D'Abramo LR AU - Toro-Vazquez J AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22860, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22860, Baja California, MexicoMississippi State Univ, Dept Wildlife & Fisheries, Mississippi State, MS 39762, USAUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, SLP, MexicoViana, MT, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22860, Baja California, Mexico TI - Effects of starvation and dietary lipid on the lipid and fatty acid composition of muscle tissue of juvenile green abalone (Haliotis fulgens) AB - Lipid metabolism of juvenile abalone, either starved or fed diets containing either 3.0 (HL) or 0.12% (LL) lipid, was investigated. Abalone were initially fed a nutritionally balanced formulated diet. Both PUFA and HUFA were low in the experimental formulated diets. After 60 days, growth rates of abalone fed the formulated diets were low and probably reflective of a lack of sufficient essential fatty acids. However, the total lipid content of the muscle tissue of abalone fed diets LL and HL remained unchanged from that of the start,of the experiment. However, the level in the starved abalone was significantly higher (21.5%) than that of abalone at the start of the experiment. The percentage of polar lipid and neutral lipid in the abalone muscle tissue ranged from 70.8% to 76.1% and 23.9% to 29.2%, respectively. Levels of 20:4n-6, 20:5n-3 and 22:5n-3 in the polar lipid of the muscle of the starved abalone significantly increased while levels of 20:4n-6 and 20:5n-3 in the neutral lipid for abalone in all treatments decreased, suggesting the essentiality of these HUFA. Levels of 20:5n-3 and 22:6n-3 in the polar lipid of the tissue of the starved abalone were significantly higher than the levels of these respective fatty acids in the abalone fed diets HL and LL. These higher levels probably reflect the weight loss associated with starvation combined with lipid not being used as an energy source. More research directed toward the determination of the fatty acid requirements of postlarvae and for successful maturation and a spawning of abalone needs to be conducted. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000224004300026 L2 - abalone;starvation;dietary lipid;muscle tissue;DONKEYS EAR ABALONE; POSTLARVAL ABALONE; TUBERCULATA L; GROWTH; FISH; NUTRITION; DISCUS; PERFORMANCE; METABOLISM; SURVIVAL SO - Aquaculture 2004 ;238(1-4):329-341 10658 UI - 5558 AU - Duron S AU - Rivera-Noriega R AU - Nkeng P AU - Poillerat G AU - Solorza-Feria O AD - Univ Strasbourg 1, Lab Electrochim & Chim Phys Corps Solide, F-67008 Strasbourg, FranceUniv Autonoma Zacatecas, Unidad Ciencias Quim A, Zacatecas 98000, MexicoIPN, CINVESTAV, Dept Quim, Mexico City 07000, DF, MexicoPoillerat, G, Univ Strasbourg 1, Lab Electrochim & Chim Phys Corps Solide, BP 296, F-67008 Strasbourg, France TI - Kinetic study of oxygen reduction on nanoparticles of ruthenium synthesized by pyrolysis of Ru(CO)(12) AB - Electrocatalytic activity for molecular oxygen reduction on nanoparticles of ruthenium mixed with Nafion(R) in 0.5 M H2SO4 was studied. The electrocatalytic material was synthesized by pyrolysis of Ru-3(CO)(12) in sealed ampoules at 190 degreesC for 3 h. The product of the pyrolysis was characterized by DSC, FTIR, XRD, SEM (EDX), TEM and also electrochemically. X-ray diffraction and TEM studies indicated that the synthesized powder presents a nano-crystalline structure. The electrochemical results obtained by rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) techniques show that the oxygen reduction reaction take place by a multi-electronic charge transfer process (n = 4e(-)) with the formation of ca. 4.5% of hydrogen peroxide. A Tafel slope of ca. -100 mV dec(-1) and an exchange current density of 7.9 x 10(-7) mA cm(-2) were deduced. The kinetics of the reduction reaction were evaluated in the potential range of 0.7-0.0 V (SHE) through a simple Damjanovic model. Further interpretation of the analysis of the kinetic results in the light of Anastasijevic's procedure is also presented. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Zacatecas PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Analytical;Electrochemistry U5 - J;Article AV - English IS - 0022-0728 UR - ISI:000221209900006 L2 - pyrolysis;oxygen reduction;electrocatalysis;nanoparticles;RING-DISK ELECTRODE; 0.5 M H2SO4; METAL; ELECTROCATALYST; DECOMPOSITION; CLUSTERS SO - Journal of Electroanalytical Chemistry 2004 ;566(2):281-289 10659 UI - 1825 AU - Dvorak MM AU - Gamba G AU - Riccardi D AD - Univ Manchester, Sch Biol Sci, Manchester M13 9PL, Lancs, EnglandUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, Mexico TI - The thiazide diuretic metolazone directly stimulates osteoblast function MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000224326802342 SO - Journal of Bone and Mineral Research 2004 ;19():S408-S408 10660 UI - 5164 AU - Dybiec M AU - Ostapenko S AU - Torchynska TV AU - Losada EV AD - Univ S Florida, Tampa, FL 33620, USAInst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoDybiec, M, Univ S Florida, 4202 E Fowler Ave, Tampa, FL 33620, USA TI - Scanning photoluminescence spectroscopy in InAs/InGaAs quantum-dot structures AB - Spatially-resolved photoluminescence (PL) spectroscopy was performed at different temperatures on self-assembled InAs quantum dots embedded into MBE-grown In0.15Ga0.85As/GaAs multiquantum-well heterostructures. Strong inhomogeneity of the PL intensity is observed by mapping samples with different In/Ga composition of the InxGa1-xAs capping layers (0.1less than or equal toxless than or equal to0.2). Two different behaviors in the quantum-dot PL maps are observed: (1) a reduction of the PL intensity is accompanied by a gradual "blue" shift of the luminescence maximum at 300 K and "red" shift at 80 K, and (2) PL intensity variation occurs at a stable peak position of the PL maximum. Two separate mechanisms are suggested to account for the observed intensity variation of the quantum-dot luminescence. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000222111800033 L2 - GAAS SO - Applied Physics Letters 2004 ;84(25):5165-5167 10661 UI - 5272 AU - Dzul A AU - Lozano R AU - Castillo P AD - Heudiasyc UTC, UMR 6599, Ctr Rech Royallieu, F-60205 Compiegne, FranceInst Tecnol Laguna, Div Estudios Posgrado & Invest, Torreon 27000, Coahuila, MexicoLozano, R, Heudiasyc UTC, UMR 6599, Ctr Rech Royallieu, BP 20529, F-60205 Compiegne, France TI - Adaptive control for a radio-controlled helicopter in a vertical flying stand AB - In this paper, we focus on the design and implementation of a controller for a two degree-of-freedom system. This system is composed of a small-scale helicopter which is mounted on a vertical platform. The model is based on Lagrangian formulation and the controller is obtained by classical pole-placement techniques for the yaw dynamics and adaptive pole-placement for the altitude dynamics. Experimental results show the performance of such a controller. Copyright (C) 2004 John Wiley Sons, Ltd MH - France MH - Mexico|Coahuila PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0890-6327 UR - ISI:000222106300004 L2 - helicopter dynamics;adaptive control;Lyapunov approach;pole-placement;SYSTEM-IDENTIFICATION; ROTORCRAFT SO - International Journal of Adaptive Control and Signal Processing 2004 ;18(5):473-485 10662 UI - 4340 AU - Eamranond PP AU - Torres J AU - Munoz O AU - Perez-Perez GI AD - NYU, Sch Med, Dept Med & Microbiol, New York, NY 10016, USAInst Mexiacano Seguro Social, Ctr Med Nacl Siglo XXI, Unidad Invest Med Enfermedades Infecc & Parasitar, Mexico City, DF, MexicoVanderbilt Univ, Sch Med, Nashville, TN 37212, USAPerez-Perez, GI, NYU, Sch Med, Dept Med, 550 1st Ave,16NBH, New York, NY 10016 USA TI - Age-specific immune response to HspA in Helicobacter pylori-positive persons in Mexico AB - The immune response to heat shock protein A (HspA) in Helicobacter pylori-positive adults increases with age in developed countries. This response has not been studied with children or in developing countries (G. I. Perez-Perez, J. M. Thiberge, A. Labigne, and M. J. Blaser, J. Infect. Dis. 174:1046-1050, 1996). As determined by using a specific enzyme-linked immunosorbent assay, HspA seropositivity among 592 individuals in Mexico was <10% in children and increased to >40% in adults MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1071-412X UR - ISI:000224046400026 L2 - HEAT-SHOCK-PROTEIN; INFECTION; DIAGNOSIS; CHILDREN; CAGA SO - Clinical and Diagnostic Laboratory Immunology 2004 ;11(5):983-985 10663 UI - 3610 AU - Ebeling W AU - Gusein-Zade SM AU - Seade J AD - Univ Hannover, Math Inst, D-30060 Hannover, GermanyMoscow MV Lomonosov State Univ, Fac Mech & Math, Moscow 119992, RussiaUniv Nacl Autonoma Mexico, Inst Matemat, Unidad Cuernavaca, Cuernavaca, Morelos, MexicoEbeling, W, Univ Hannover, Math Inst, Postfach 6009, D-30060 Hannover, Germany TI - Homological index for 1-forms and a Milnor number for isolated singularities AB - We introduce a notion of a homological index of a holomorphic 1-form on a germ of a complex analytic variety with an isolated singularity, inspired by Gomez-Mont and Greuel. For isolated complete intersection singularities it coincides with the index defined earlier by two of the authors. Subtracting from this index another one, called radial, we get an invariant of the singularity which does not depend on the 1-form. For isolated complete intersection singularities this invariant coincides with the Milnor number. We compute this invariant for arbitrary curve singularities and compare it with the Milnor number introduced by Buchweitz and Greuel for such singularities MH - Germany MH - Mexico|Morelos MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0129-167X UR - ISI:000225804300002 L2 - index;radial index;homological index;1-forms;Milnor number;isolated singularity;de Rham complex;FORMULA SO - International Journal of Mathematics 2004 ;15(9):895-905 10664 UI - 4120 AU - Echeverria JC AU - Woolfson MS AU - Crowe JA AU - Hayes-Gill BR AU - Pieri JF AU - Spencer CJ AU - James DK AD - Univ Nottingham, Sch Elect & Elect Engn, Nottingham, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Elect Engn, Mexico City, DF, MexicoUniv Nottingham, Sch Human Dev, Queens Med Ctr, Nottingham, EnglandEcheverria, JC, Univ Nottingham, Sch Elect & Elect Engn, Nottingham, England TI - Does fractality in heart rate variability indicate the development of fetal neural processes? AB - By using an improved detrended fluctuation analysis we studied the scaling behaviour of 53 long-term series of fetal heart rate fluctuations. Our results suggest that fractality begins to arise around 24 weeks of normal human gestation and that this condition, showing some additional developments, seems to be preserved during gestation. This may provide new evidence of a role played by cortical-to-subcortical pathways in the long-term fractal nature of heart rate variability data. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000224478200014 L2 - alpha ss filter;fetal development;heart rate variability;improved detrended fluctuation analysis;long-range correlations;1/f;DETRENDED FLUCTUATION ANALYSIS; POWER-LAW BEHAVIOR; TIME-SERIES; CHAOS THEORY; COMPLEXITY; DYNAMICS; INFANTS; HUMANS; SLEEP; PAIN SO - Physics Letters A 2004 ;331(3-4):225-230 10665 UI - 5024 AU - Echeverria JC AU - Hayes-Gill BR AU - Crowe JA AU - Woolfson MS AD - Univ Nottingham, Sch Elect & Elect Engn, Nottingham NG7 2RD, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Elect Engn, Mexico City 09340, DF, MexicoCanberra Hosp, Dept Paediat, Garran, AustraliaEcheverria, JC, Univ Nottingham, Sch Elect & Elect Engn, Nottingham NG7 2RD, England TI - Detrended fluctuation analysis: a suitable method for studying fetal heart rate variability? AB - We evaluate the suitability of an enhanced detrended fluctuation analysis for studying fetal heart rate series involving imperfect quality of information. Our results indicate that to explore persistent long-range correlations, or fractality, the collection requirements of the data can be relaxed by allowing the possibility of using averaged fetal heart rate series. In addition, it also appears feasible to employ, without producing major alterations in the long-range scaling behaviour, fragmented fetal heart rate series involving up to 50% of random missing values, or up to 50 min of consecutive missing samples in recordings of approximate to8 h length. These are crucial advantages to overcome the often variable quality of fetal data. Consequently, these findings may open the possibility of obtaining information concerning the development of neural processes from fetal heart rate series, despite their non-stationary and fragmented nature MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Biophysics;Engineering, Biomedical;Physiology U5 - J;Article AV - English IS - 0967-3334 UR - ISI:000222377900016 L2 - heart rate variability;enhanced detrended fluctuation analysis;long-range correlations;l/f;fractality;non-stationary;fetal heart rate;ACUTE MYOCARDIAL-INFARCTION; TIME-SERIES; SPECTRAL-ANALYSIS; PHYSIOLOGICAL SIGNALS; INTERVAL DYNAMICS; FRACTAL DIMENSION; SLEEP; ESTIMATORS; RECORDINGS; COMPONENTS SO - Physiological Measurement 2004 ;25(3):763-774 10666 UI - 3336 AU - Eenens P AD - Univ Guanajuato, Dept Astron, Guanajuato 36000, Gto, Mexico. Univ Liege, Inst Astrophys, B-4000 Liege, Belgium TI - Rotation of B[e] supergiants, Luminous Blue Variables and Wolf-Rayet stars AB - A brief review of the observational properties of evolved massive stars is presented. In the pursuit of clues for their rotation, formidable difficulties axe encountered. At the same time. common features emerge between B[e] supergiants, Luminous Blue Variables and Wolf-Rayet stars. Several indications of rapid rotation are found, mostly indirect ones, in each class. It. is shown that, fast rotation can probably survive the mass loss events which characterize the late evolution of massive stars MH - Belgium MH - Mexico|Guanajuato T3 - STELLAR ROTATIONIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Review NT - SEnglishRevieweenens@astro.ugto.mx0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBBM41 AV - English IS - 0074-1809 UR - ISI:000226161500028 SO - 2004 ;(215):97-106 10667 UI - 5644 AU - Efferth T AU - Ramirez T AU - Gebhart E AU - Halatsch ME AD - Univ Heidelberg, Ctr Mol Biol, D-69120 Heidelberg, GermanyInst Invest Biomed, Inst Nacl Cancerol, Unidad Invest Biomed Canc, Mexico City, DF, MexicoUniv Erlangen Nurnberg, Inst Human Genet, D-8520 Erlangen, GermanyUniv Gottingen, Dept Neurosurg, D-3400 Gottingen, GermanyEfferth, T, Univ Heidelberg, Ctr Mol Biol, Neuenheimer Feld 282, D-69120 Heidelberg, Germany TI - Combination-treatment of glioblastoma multiforme cell lines with the anti-malarial artesunate and the epidermal growth factor receptor tyrosine kinase inhibitor OSI-774 AB - New drugs and combination modalities for otherwise non-responsive brain tumors are urgently required. The anti-malarial artesunate (ART) and the EGFR tyrosine kinase inhibitor OSI-774 reveal profound cytotoxic activity. The effectiveness of a combination treatment and the underlying molecular determinants of cellular response are unknown. In the present investigation, we studied ART and OSI-774 in glioblastoma multiforme (GBM) cell lines. Supra-additive inhibition of cell growth was observed in U-87MG.DeltaEGFR cells transduced with a deletion-mutant constitutively active EGFR gene, while additive effects were present in cells transduced with wild-type EGFR (U-87MG.WT-2N), kinase-deficient EGFR (U-87MG.DK-2N), mock vector controls (U-87MG.LUX), or non-transduced parental U-87MG cells. Among nine other non-transduced GBM cell lines, supra-additive effects were found in two cell lines (G-210GM, G-599GM), while ART and OSI-774 acted in an additive manner in the other seven cell lines (G-211GM, G-750GM, G-1163GM, G-1187GM, G-1265GM, G-1301GM, and G-1408GM). Sub-additive or antagonistic effects were not observed. Genomic gains and losses of genetic material in the non-transduced cell lines as assessed by comparative genomic hybridization were correlated with the IC50 values for ART and OSI-774 and subsequently subjected to hierarchical cluster analysis and cluster image mapping. A genomic profile of imbalances was detected that predicted cellular response to ART and OSI-774. The genes located at the genomic imbalances of interest may serve as candidate resistance genes of GBM cells towards ART and OSI-774. In conclusion, the combination treatment of ART and OSI-774 resulted in an increased growth inhibition of GBM cell lines as compared to each drug alone. (C) 2004 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0006-2952 UR - ISI:000221078700007 L2 - artesunate;epidermal growth factor receptor;comparative genomic hybridization;glioblastoma multiforme;hierarchical cluster analysis;small molecule inhibitor;COMPARATIVE GENOMIC HYBRIDIZATION; NF-KAPPA-B; DRUG-RESISTANCE; TRANSCRIPTIONAL REGULATION; MOLECULAR-MODES; MESSENGER-RNA; LUNG-CANCER; EXPRESSION; CHEMOTHERAPY; FAMILY SO - Biochemical Pharmacology 2004 ;67(9):1689-1700 10668 UI - 6289 AU - eguez-Uribeondo J AU - Gierz G AU - Bartnicki-Garcia S AD - Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521, USAUniv Calif Riverside, Dept Math, Riverside, CA 92521, USACtr Invest Cientificas & Estudios Super Ensenada, Ensenada 22830, Baja California, MexicoCSIC, Real Jardin Bot, Madrid 28014, SpainBartnicki-Garcia, S, Ctr Invest Cientificas & Estudios Super Ensenada, POB 430222, San Diego, CA 92143 USA TI - Image analysis of hyphal morphogenesis in Saprolegniaceae (Oomycetes) AB - Because of their wide range of apical morphology, several members of saprolegniaceous fungi (Oomycetes) were chosen to examine concordance with the vesicle supply center (VSC) model of hyphal morphogenesis. Two computer routines were devised to measure diameter changes over long stretches of hyphae and to test compatibility with the theoretical hyphoid shape, y = xcot(xV/N). In all four genera examined, the apex followed closely the contour described by the hyphoid equation; divergences became evident in the subapex. The hyphae of Saprolegnia parasitica showed maximum concordance with the VSC model, i.e., their profile matched a hyphoid curve from the apex to the entire length of the mature hyphal tube. In Aphanomyces and Leptolegnia, growth in the subapical region subsided becoming less than that specified by the hyphoid equation. In Achlya bisexualis, the reverse was true, the subapical region expanded beyond that specified by the hyphoid equation. The two divergent subapical tendencies gave the hyphal tips a cylindroid or conoid appearance, respectively. Since the hyphal apex of all four species conformed to the curvature dictated by the hyphoid equation, we concluded that a basic VSC mechanism operates in all of these oomycetous fungi. Accordingly, we suggest that the shape of an oomycetous hypha is generated by a VSC-driven gradient of wall formation, which is subject to additional modification in the subapex to produce a range of hyphal tip morphologies. The mathematical basis for generating a conoid hyphal tip by elongating the VSC is described in Appendix A. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Baja California MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity;Mycology U5 - J;Article AV - English IS - 1087-1845 UR - ISI:000188840800002 L2 - conoid tips;growth;hyphae;hyphal diameter;hyphoid model;morphogenesis;morphology;oomycetes;VSC;CELL-WALL SYNTHESIS; VESICLE SUPPLY CENTER; FUNGAL MORPHOGENESIS; TIP GROWTH; ALLOMYCES-MACROGYNUS; MUCOR-ROUXII; SPITZENKORPER; ORGANIZATION; DETERMINES; MODEL SO - Fungal Genetics and Biology 2004 ;41(3):293-307 10669 UI - 4742 AU - Eidelman S AU - Hayes KG AU - Olive KA AU - guilar-Benitez M AU - Amsler C AU - Asner D AU - Babu KS AU - Barnett RM AU - Beringer J AU - Burchat PR AU - Carone CD AU - Caso C AU - Conforto G AU - Dahl O AU - D'Ambrosio G AU - Doser M AU - Feng JL AU - Gherghetta T AU - Gibbons L AU - Goodman M AU - Grab C AU - Groom DE AU - Gurtu A AU - Hagiwara K AU - Hernandez-Rey JJ AU - Hikasa K AU - Honscheid K AU - Jawahery H AU - Kolda C AU - Kwon Y AU - Mangano ML AU - Manohar AV AU - March-Russell J AU - Masoni A AU - Miquel R AU - Monig K AU - Murayama H AU - Nakamura K AU - Navas S AU - Pape L AU - Patrignani C AU - Piepke A AU - Raffelt G AU - Roos M AU - Tanabashi M AU - Terning J AU - Tornqvist NA AU - Trippe TG AU - Vogel P AU - Wohl CG AU - Workman RL AU - Yao WM AU - Zyla PA AU - Armstrong B AU - Gee PS AU - Harper G AU - Lugovsky KS AU - Lugovsky SB AU - Lugovsky VS AU - Rom A AU - Artuso M AU - Barberio E AU - Battaglia M AU - Bichsel H AU - Biebel O AU - Bloch P AU - Cahn RN AU - Casper D AU - Cattai A AU - Chivukula RS AU - Cowan G AU - Damour T AU - Desler K AU - Dobbs MA AU - Drees M AU - Edwards A AU - Edwards DA AU - Elvira VD AU - Erler J AU - Ezhela VV AU - Fetscher W AU - Fields BD AU - Fosler B AU - Froidevaux D AU - Fukugita M AU - Gaisser TK AU - Garren L AU - Gerber HJ AU - Gerbier G AU - Gilman FJ AU - Haber HE AU - Hagmann C AU - Hewett J AU - Hinchliffe I AU - Hogan CJ AU - Hohler G AU - Igo-Kemenes P AU - Jackson JD AU - Johnson KF AU - Karlen D AU - Kayser B AU - Kirkby D AU - Klein SR AU - Kleinknecht K AU - Knowles IG AU - Kreitz P AU - Kuyanov YV AU - Lahav O AU - Langacker P AU - Liddle A AU - Littenberg L AU - Manley DM AU - Martin AD AU - Narain M AU - Nason P AU - Nir Y AU - Peacock JA AU - Quinn HR AU - Raby S AU - Ratcliff BN AU - Razuvaev EA AU - Renk B AU - Rolandi G AU - Ronan MT AU - Rosenberg LJ AU - Sachrajda CT AU - Sakai Y AU - Sanda AI AU - Sarkar S AU - Schmitt M AU - Schneider O AU - Scott D AU - Seligman WG AU - Shaevitz MH AU - Sjostrand T AU - Smoot GF AU - Spanier S AU - Spieler H AU - Spooner NJC AU - Srednicki M AU - Stahl A AU - Stanev T AU - Suzuki M AU - Tkachenko NP AU - Trilling GH AU - Valencia G AU - van Bibber K AU - Vincter MG AU - Ward DR AU - Webber BR AU - Whalley M AU - Wolfenstein L AU - Womersley J AU - Woody CL AU - Zenin OV AU - Zhu RY AD - Budker Inst Nucl Phys, RU-630090 Novosibirsk, RussiaHillsdale Coll, Dept Phys, Hillsdale, MI 49242, USAUniv Minnesota, Sch Phys & Astron, Minneapolis, MN 55455, USACIEMAT, E-28040 Madrid, SpainUniv Zurich, Inst Phys, CH-8057 Zurich, SwitzerlandUniv Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAOklahoma State Univ, Dept Phys, Stillwater, OK 74078, USALawrence Berkeley Lab, Div Phys, Berkeley, CA 94720, USAStanford Univ, Dept Phys, Stanford, CA 94305, USAColl William & Mary, Dept Phys, Nucl & Particle Theory Grp, Williamsburg, VA 23187, USAUniv Genoa, Ist Nazl Fis Nucl, I-16146 Genoa, ItalyUniv Genoa, Dipartimento Fis, I-16146 Genoa, ItalyUniv Urbino, I-61029 Urbino, ItalyIst Nazl Fis Nucl, Sez Firenze, I-50125 Florence, ItalyUniv Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, ItalyCERN, European Org Nucl Res, CH-1211 Geneva 23, SwitzerlandUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USACornell Univ, Newman Lab Elementary Particle Phys, Ithaca, NY 14853, USAArgonne Natl Lab, Argonne, IL 60439, USAETH, Inst Particle Phys, CH-8093 Zurich, SwitzerlandTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaKEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, JapanUniv Valencia, CSIC, IFIC, Inst Fis Corpuscular, E-46071 Valencia, SpainTohoku Univ, Dept Phys, Aoba Ku, Sendai, Miyagi 9808578, JapanOhio State Univ, Dept Phys, Columbus, OH 43210, USAUniv Maryland, Dept Phys & Astron, College Pk, MD 20742, USAUniv Notre Dame, Dept Phys, Notre Dame, IN 46556, USAYonsei Univ, Dept Phys, Seoul 120749, South KoreaUniv Calif San Diego, Dept Phys, La Jolla, CA 92093, USACitta Univ Monserrato, Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Monserrato, CA, ItalyDESY, D-15735 Zeuthen, GermanyUniv Calif Berkeley, Dept Phys, Berkeley, CA 94720, USAUniv Granada, Dept Fis Teor & Cosmos, E-18071 Granada, SpainUniv Granada, CAFPE, E-18071 Granada, SpainUniv Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487, USAMax Planck Inst Phys & Astrophys, Werner Heisenberg Inst Phys, D-80805 Munich, GermanyUniv Helsinki, Dept Phys Sci, FIN-00014 Helsinki, FinlandLos Alamos Natl Lab, Los Alamos, NM 87545, USACALTECH, Kellogg Radiat Lab, Pasadena, CA 91125, USAGeorge Washington Univ, Dept Phys, Ashburn, VA 20147, USAInst High Energy Phys, COMPAS Grp, RU-142284 Protvino, RussiaSyracuse Univ, Dept Phys, Syracuse, NY 13244, USAUniv Melbourne, Sch Phys, Parkville, Vic 3052, AustraliaUniv Washington, Dept Astron, Seattle, WA 98195, USAMichigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USAUniv London, Dept Phys, Egham TW20 OEX, Surrey, EnglandInst Hautes Etud Sci, F-91440 Bures Sur Yvette, FranceDESY, D-22603 Hamburg, GermanyTech Univ Munich, Fak Phys Dept, D-85748 Garching, GermanyFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Illinois, Dept Astron, Urbana, IL 61801, USAUniv Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, EnglandUniv Tokyo, Inst Cosmic Ray Res, Kashiwa 2778582, Chiba, JapanUniv Delaware, Bartol Res Inst, Newark, DE 19716, USACEA Saclay, F-91191 Gif Sur Yvette, FranceCarnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213, USAUniv Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064, USALawrence Livermore Natl Lab, Livermore, CA 94550, USAStanford Linear Accelerator Ctr, Stanford, CA 94309, USAUniv Karlsruhe, Inst Theoret Phys, D-76128 Karlsruhe, GermanyUniv Heidelberg, Inst Phys, D-69120 Heidelberg, GermanyFlorida State Univ, Dept Phys, Tallahassee, FL 32306, USACarleton Univ, Dept Phys, Ottawa, ON K1S 5B6, CanadaUniv Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720, USAUniv Mainz, Inst Phys, D-55099 Mainz, GermanyUniv Edinburgh, Inst Astron, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Penn, Dept Phys, Philadelphia, PA 19104, USAUniv Sussex, Ctr Astron, Brighton BN1 9RH, E Sussex, EnglandBrookhaven Natl Lab, Dept Phys, Upton, NY 11973, USAKent State Univ, Dept Phys, Kent, OH, USAUniv Durham, Inst Particle Phys, Dept Phys, Durham DH1 3LE, EnglandBoston Univ, Dept Phys, Boston, MA, USAIst Nazl Fis Nucl, I-20133 Milan, ItalyWeizmann Inst Sci, Dept Particle Phys, I-76100 Rehovot, IsraelMIT, Dept Phys & Lab Nucl Sci, Cambridge, MA 02139, USAUniv Southampton, Dept Phys & Astron, Southampton S017 1BJ, Hants, EnglandNagoya Univ, Dept Phys, Nagoya, Aichi 4848602, JapanUniv Oxford, Theoret Phys, Oxford OX1 3NP, EnglandNorthwestern Univ, Dept Phys & Astron, Evanston, IL 60208, USASwiss Fed Inst Technol, Lausanne, SwitzerlandUniv British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, CanadaColumbia Univ, Nevis Labs, Irwington, NY 10533, USAColumbia Univ, Dept Phys, New York, NY 10027, USALund Univ, Dept Theoret Phys, S-23362 Lund, SwedenUniv Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandUniv Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106, USAIowa State Univ Sci & Technol, Dept Phys, Ames, IA 50011, USAUniv Alberta, Dept Phys, Edmonton, AB T6G 2JJ, CanadaCavendish Lab, Cambridge CB3 0HE, EnglandCALTECH, Dept Phys, Pasadena, CA 91125, USAEidelman, S, Budker Inst Nucl Phys, RU-630090 Novosibirsk, Russia TI - Review of particle physics AB - This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 1726 new measurements from 512 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We also summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, particle detectors, probability, and statistics. Among the 119 reviews are many that are new or heavily revised including those on neutrino mixing, CP violation in K, D, and B mesons, V-cb, the new exotic e(1540) particle, extra-dimensions, grand unified theories, cosmic background radiation, dark matter, cosmological parameters, and big bang cosmology. A booklet is available containing the Summary Tables and abbreviated versions of some of the other sections of this full Review. All tables, listings, and reviews (and errata) are also available on the Particle Data Group website: http://pdg.lbl.gov MH - Australia MH - Canada MH - United Kingdom MH - Finland MH - France MH - Germany MH - India MH - Israel MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Russia MH - South Korea MH - Spain MH - Sweden MH - Switzerland MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2847 U4 - Physics, Multidisciplinary U5 - J;Review AV - English IS - 0370-2693 UR - ISI:000223089300001 SO - Physics Letters B 2004 ;592(1-4):1-1109 10670 UI - 4917 AU - Eis SR AU - Albergaria BH AU - Clark P AD - Ctr Diagnost & Pesquisa Osteoporose ES, Vitoria, BrazilUniv Nacl Autonoma Mexico, CMN Siglo 21 Fac Med, UIM Epidemiol Clin, Mexico City 04510, DF, Mexico TI - The influence of family history of osteoporotic fracture on the risk of vertebral osteoporosis in women MH - Brazil MH - Mexico|Distrito Federal PB - GODALMING: SPRINGER LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000221453600161 SO - Osteoporosis International 2004 ;15():S52-S52 10671 UI - 4918 AU - Eis SR AU - Moana EJ AU - Tirone A AU - Clark P AU - Cummings S AD - Univ Nacl Autonoma Mexico, CMN Siglo 21 Fac Med, UIM Epidemiol Clin, Mexico City 04510, DF, MexicoUniv Calif San Francisco, San Francisco, CA 94143, USA TI - Prevalence of osteoporosis in Brazilian women MH - Mexico|Distrito Federal MH - USA PB - GODALMING: SPRINGER LONDON LTD RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0937-941X UR - ISI:000221453600165 SO - Osteoporosis International 2004 ;15():S53-S53 10672 UI - 4558 AU - Eischen FA AU - Vergara CH AD - USDA ARS SARC, Honey Bee Unit, Weslaco, TX 78596, USAUniv Amer Puebla, Dept Quim & Biol, Puebla 72820, MexicoEischen, FA, USDA ARS SARC, Honey Bee Unit, 2413 E Hwy 83, Weslaco, TX 78596 USA TI - Natural products smoke and its effect on Acarapis woodi and honey bees AB - We tested the effect natural products smoke has on the honey bee tracheal mite (Acarapis woodi) and honey bees. Plant materials screened for activity included coffee beans (Coffea arabica), corncobs (Zea mays), creosote bush (Larrea tridentata), eucalyptus (Eucalyptus sp.), orange peel (Citrus sinensis), pecan leaves (Carya illinoiensis), dead and fresh pine needles (Pinus cembroides), mesquite leaves (Prosopis glandulosa) and tobacco (Nicotiana tabacum). Low but significant mite mortality was caused by the smoke of pine needles, mesquite, corncobs, and coffee beans. The smoke of L. tridentata killed more adult A. woodi than other materials (LT50=2.4 min, single exposure). It was not effective against immatures. Mite mortality was negatively correlated with parasites/trachea, suggesting that reduced air flow while breathing may have reduced efficacy. Efficacy was modest (ca. 70%) and it caused transitory bee anesthesia. We do not recommend using this material as a control MH - USA MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000223717700001 L2 - creosote bush;Larrea tridentata;smoke;Acarapis woodi;secondary plant products;NORDIHYDROGUAIARETIC ACID; LARREA-TRIDENTATA; DESERT GRASSHOPPER; CREOSOTEBUSH; VARROA; AMITRAZ; QUALITY; TANNINS; RENNIE; MITES SO - Apidologie 2004 ;35(4):341-349 10673 UI - 4357 AU - Eitam A AU - Sivinski J AU - Holler T AU - Aluja M AD - USDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32604, USAUniv Florida, Dept Entomol & Nematol, Gainesville, FL 32611, USAUSDA, APHIS, PPQ, CPHST,Gainesville Plant Protect Stn, Gainesville, FL 32604, USAInst Ecol AC, Xalapa 91000, Veracruz, MexicoSivinski, J, USDA ARS, Ctr Med Agr & Vet Entomol, POB 14565, Gainesville, FL 32604 USA TI - Biogeography of braconid parasitoids of the Caribbean fruit fly (Diptera : Tephritidae) in Florida AB - The geographic distribution of three braconid parasitoids of the Caribbean fruit fly, Anastrepha suspensa (Loew), was determined by collecting host fruit throughout central and southern Florida. Diachasmimorpha longicaudata (Ashmead) was most abundant in southern Florida, occurring at higher latitudes along the Atlantic and Gulf coasts. Distribution of this species was negatively related to variance of monthly temperatures. This suggests that D. longicaudata may be dependent on a relatively constant supply of hosts. Doryctobracon areolatus (Szepligeti) was the dominant species at the majority of interior locations, but it was uncommon or absent along both coasts. Utetes anastrephae (Viereck) was widespread but usually less common than the other species. Parasitism levels of both D. areolatus and D. longicaudata were positively related to density of common guava, Psidium guajava L., trees. Parasitism levels of both D. longicaudata and U. anastrephae were positively related to numbers of A. suspensa captured in McPhail traps. Abundance of D. areolatus was inversely related to that of both D. longicaudata and U. anastraphae. The absence of D. areolatus in southeastern Florida, where it was originally established, suggests that a process of competitive displacement may have occurred. Parasitoid distribution is consistent with the hypothesis that D. areolatus is a superior searcher and D. longicaudata is a superior intrinsic competitor MH - USA MH - Mexico|Veracruz PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000224104100010 L2 - braconidae;distribution;environmental factors;interspecific competition;ANASTREPHA SPECIES DIPTERA; BIOLOGICAL-CONTROL; FLIES DIPTERA; MELON FLY; HYMENOPTERA-BRACONIDAE; INTRODUCED PARASITES; POPULATION-DYNAMICS; DORSALIS DIPTERA; HAWAIIAN-ISLANDS; LARVAL-PUPAL SO - Annals of the Entomological Society of America 2004 ;97(5):928-939 10674 UI - 5009 AU - Elechiguerra JL AU - Manriquez JA AU - Yacaman MJ AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Texas Mat Inst, Austin, TX 78712, USACtr Sistemas Integrados Mfg Tecnol Monterrey, Monterrey 64849, NL, MexicoYacaman, MJ, Univ Texas, Dept Chem Engn, Austin, TX 78712, USA TI - Growth of amorphous SiO2 nanowires on Si using a Pd/Au thin film as a catalyst AB - Nanowires of amorphous SiO2 were synthesized by thermal processing of a Si(100) substrate at 1100degreesC in the presence of a nitrogen flow, and using a 15 nm thick high silicon-solubility Pd/Au film as a catalyst. The substrate itself was the only source of silicon for the nanowire growth. The nanostructures produced were characterized by high resolution transmission and scanning electron microscopy and by X-ray diffraction. The nanowire growth is consistent with the vapor-liquid-solid (VLS) mechanism, with particles of Pd2Si and Au(Pd) being observed to form from the reaction between silicon and the catalytic film, and to remain at the tip of the wires. The synthesized nanowires showed a well defined morphology which could be very interesting for lasing applications MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 13 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000221675000015 L2 - ALIGNED SILICA NANOWIRES; CHEMICAL-VAPOR-DEPOSITION; PHOTOLUMINESCENCE PROPERTIES; ZNO NANOWIRES; EMISSION SO - Applied Physics A-Materials Science & Processing 2004 ;79(3):461-467 10675 UI - 4254 AU - Elicer-Cortes JC AU - Contreras R AU - Boyer D AU - Pavageau M AU - Hernandez RH AD - Univ Chile, Dept Ingn Mecan, Santiago, ChileUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoEcole Mines, GPEA, UMR 6144, CNRS,DSSE, F-44307 Nantes 3, FranceElicer-Cortes, JC, Univ Chile, Dept Ingn Mecan, Beauchef 850,5o Piso,Casilla 2777, Santiago, Chile TI - Temperature spectra from a turbulent thermal plume by ultrasound scattering AB - This paper reports the results of a study on temperature inhomogeneities conducted on a thermal plume by using ultrasound scattering as a non-intrusive measurement technique. The plume rises from a metallic disk which can be heated up to 800 degreesC. The working fluid is air at atmospheric pressure. In the measurement technique, an incoming ultrasound wave is emitted towards the thermal plume. The incident wave is scattered because of non-linear couplings with the flow instabilities present in the measurement region. The scattered wave carries information about those flow instabilities. The technique allows for the retrieving of this information. The shape of the obtained spectrum of temperature fluctuations as a function of wave vector modulus \(q) over right arrow \ = q is consistent with previous theoretical analysis. Three qualitatively different regions were identified: first, a production region characterized by a q(2) law; secondly, a region with behavior as per q(-3) associated with a buoyancy region and; finally, a dissipation region associated with a q(-7) law. These spectral regions characterize the energy transfers mechanisms among the length scales of flow investigated here. A coefficient of anisotropy gamma was defined to analyze anisotropic features of the flow. (C) 2004 Elsevier Inc. All rights reserved MH - Chile MH - France MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Engineering, Mechanical;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0894-1777 UR - ISI:000224233200002 L2 - thermal plume;temperature spectra;turbulence;ultrasound scattering;FREE-CONVECTION FLOW; SOUND; PROBE SO - Experimental Thermal and Fluid Science 2004 ;28(8):803-813 10676 UI - 5446 AU - Elizondo EJ AU - Kurano K AU - Watanabe K AD - Natl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMeiji Univ, Dept Math, Tama Ku, Kawasaki, Kanagawa 2148571, JapanNihon Univ, Coll Human & Sci, Dept Math, Setagaya Ku, Tokyo 1560045, JapanElizondo, EJ, Natl Autonomous Univ Mexico, Inst Matemat, Ciudad Univ, Mexico City 04510, DF, Mexico TI - The total coordinate ring of a normal projective variety MH - Japan MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000221620900009 SO - Journal of Algebra 2004 ;276(2):625-637 10677 UI - 4460 AU - Elyukhin VA AU - Sanchez VM AU - Elyukhina OV AD - IPN, CINVESTAV, Dept Ingn Elect, Mexico City 07360, DF, MexicoAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaElyukhin, VA, IPN, CINVESTAV, Dept Ingn Elect, Mexico City 07360, DF, Mexico TI - Self-assembling in AlxGa(1-x)N(y)As(1-y) alloys AB - The self-assembling of the isoelectronic cation impurities in lightly anion-doped AlxGa1-xNyAs1-y alloys with the zinc blende structure is predicted. The tetrahedral surroundings of Ga (Al) impurity atoms should be formed around As (N) impurity atoms in AlN-enriched (GaAs-enriched) alloys. The cation impurity concentrations for the complete Ga (Al) surroundings of all As (N) atoms are estimated at the higher growth and lower annealing temperatures. The advantage of the Al-N and Ga-As bonding over the Al-As and Ga-N bonding is an origin of the self-assembling in lightly isoelectronically-doped AlxGa1-xNyAs1-y alloys. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000223859800016 L2 - ALXGA1-XNYAS1-Y ALLOYS; SPINODAL DECOMPOSITION; SOLID-SOLUTIONS; GAASN SO - Applied Physics Letters 2004 ;85(10):1704-1706 10678 UI - 6058 AU - Elyukhin VA AU - Sorokina LP AD - IPN, CINVESTAV, Dpt Ingn Elect SEES, Mexico City, DF, MexicoTexas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409, USAElyukhin, VA, IPN, CINVESTAV, Dpt Ingn Elect SEES, Mexico City, DF, Mexico TI - Precipitation in AlxGa1-xNyAs1-y alloys AB - We predict the decomposition peculiarities of the heavy isoelectronic impurities doped AlchiGa1-chiNyAs1-(y) alloys. The AIN and GaAs precipitates in the high GaAs and AIN content AlchiGa1-chiNyAs1-y epitaxial layers, respectively, should be formed. The free energy of the alloys is expressed as a sum of the free energies of the constituent compounds, strain and elastic energies, and configurational entropy term. The regular solution model is used for describing the free energies of the compounds and strain energy. The interaction parameters between the compounds are estimated by the valence force field model. The stiffness coefficients of the wurtzite AIAs and GaAs as well as the interaction parameter between AIN and AIAs are calculated MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Crystallography;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1528-7483 UR - ISI:000220038600020 L2 - SOLID-SOLUTIONS; BAND-GAP; SPINODAL DECOMPOSITION; STRAIN-ENERGY; BONDS; SEMICONDUCTORS; REDUCTION; LENGTHS SO - Crystal Growth & Design 2004 ;4(2):337-341 10679 UI - 4251 AU - eman-Mateo H AU - Romero JE AU - Morales NM AU - Salazar G AU - Triana MH AU - Valencia ME AD - Ctr Invest Alimentac & Desarrollo, Direcc Nutr, Div Nutr, Hermosillo 83000, Sonora, MexicoUniv Chile, Inst Nutr & Tecnol Alimentos, Area Nutr Publ, Lab Metab Energet & Isotopos Estables, Santiago 11, ChileInst Nutr & Higiene Alimentos, Dept Bioquim & Fisiol, Havana, CubaAleman-Mateo, H, Ctr Invest Alimentac & Desarrollo, Direcc Nutr, Div Nutr, Carretera Victoria Km 0-6,Apartado Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Body composition by three-compartment model and relative validity of some methods to assess percentage body fat in Mexican healthy elderly subjects AB - Background: In Mexico, there is scarce information about the body composition in the elderly. Some researchers have measured body fat by anthropometry and bioelectrical impedance. These techniques are practical and can be used in the field; however, proper validation is required. This implies the use of accurate and precise methods. In the elderly, Siri's three-compartment (3C) model has been proposed as feasible alternative to the gold standard four-compartment model. Objective: To evaluate the body composition by the 3C model and the relative validity of densitometry and hydrometry methods to assess the percentage body fat (%BF) in 37 healthy Mexican elderly subjects. Methods: The body density was measured by air displacement plethysmography, total body water was evaluated by means of an isotopic dilution technique, and two different hydration factors were used to determine the fat-free mass. These measurements were used to calculate %BF by the 3C model. Accuracy and precision of the methods were tested by a two-way analysis of variance and regression procedures and bias by Bland and Altman analysis. Results: In men and women as a whole group, the %BF by the 3C model was 34.4+/-8.01. Women had higher values of %BF as compared with men (41.7+/-3.7 vs. 29.4 +/-6.4; p<0.0001). The regression procedures showed that air displacement plethysmography was accurate and precise only in women and in the whole group. Regression analyses of %BF by total body water (using both hydration factors) and 3C model showed that the intercepts were not different from zero and that the slopes were not different from 1.0 in men and women separately and as group. Conclusion: In this study, the total-body water method revealed a good relative validity (accuracy, precision, and freedom from bias) as compared with the 3C model in men and women both separately and as a group and may be acceptable for the estimation of %BF in individuals or groups of healthy elderly subjects. Copyright (C) 2004 S. Karger AG, Basel MH - Chile MH - Cuba MH - Mexico|Sonora PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 3 U4 - Geriatrics & Gerontology U5 - J;Article AV - English IS - 0304-324X UR - ISI:000224405400003 L2 - body composition;Mexican elderly;three-compartment model;4-COMPARTMENT MODEL; MEN; WOMEN; WATER; AGE; PREDICTION; POPULATION; EQUATIONS; PEOPLE; YOUNG SO - Gerontology 2004 ;50(6):366-372 10680 UI - 2990 AU - Emery R AU - Baraf HS AU - Schiff M AU - Dougados M AU - van der Heijde D AU - Ramos-Remus C AU - Estevez EC AU - Calin A AU - Kvien TK AU - Melian A AD - Leeds Gen Infirm, Acad Unit Musculoskeletal Dis, Dept Rheumatol, Leeds, W Yorkshire, EnglandCtr Rheumatol & Bone Res, Wheaton, MD, USADenver Arthrit Clin, Denver, CO, USAUniv Paris 05, Cochin Hosp, Paris, FranceUniv Hosp Maastricht, Maastricht, NetherlandsCtr Med Occidente, IMSS, Dept Rheumatol, Guadalajara, Jalisco, MexicoUniv Cordoba, Hosp Reina Sofia, Serv Rheumatol, Cordoba, SpainRoyal Natl Hosp Rheumat Dis, Bath BA1 1RL, Avon, EnglandDiakonhjemmet Hosp, Oslo, NorwayMerck & Co Inc, Clin Immunol & Analgesia, Rahway, NJ 07065, USA TI - Etoricoxib, a COX-2 selective inhibitor, in ankylosing spondylitis (AS) patients with poor response to nonsteroidal anti-inflammatory drugs (NSAIDs) MH - United Kingdom MH - France MH - Mexico|Jalisco MH - Netherlands MH - Norway MH - Spain MH - USA PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551500308 SO - Annals of the Rheumatic Diseases 2004 ;63():99-99 10681 UI - 4892 AU - Encalada I AU - Richmond JC AD - New England Baptist Hosp, Dept Orthoped, Boston, MA 02120, USACtr Nacl Rehabil Ortopedia, Arthroscopy & Sports Med Dept, Mexico City, DF, MexicoRichmond, JC, New England Baptist Hosp, Dept Orthoped, 125 Parker Hill Ave, Boston, MA 02120 USA TI - Osteonecrosis after arthroscopic meniscectomy using radiofrequency AB - The purpose of this report is to describe a case of osteonecrosis that occurred after arthroscopic meniscectomy associated with a radiofrequency device. The patient developed increasing knee pain and disability 6 months after arthroscopic meniscectomy. Magnetic resonance imaging showed subchondral osteonecrosis of both femoral condyles with cyst formation MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 6 U4 - Orthopedics;Surgery U5 - J;Article AV - English IS - 0749-8063 UR - ISI:000222802500013 L2 - knee;meniscectomy;radiofrequency;osteonecrosis;arthroscopic;MEDIAL MENISCECTOMY; LASER MENISCECTOMY; HUMAN MENISCUS; IN-VITRO; KNEE; MONOPOLAR; BIPOLAR SO - Arthroscopy-the Journal of Arthroscopic and Related Surgery 2004 ;20(6):632-636 10682 UI - 4124 AU - Endo M AU - Hayashi T AU - Kim YA AU - Terrones M AU - Dresselhaus MS AD - Shinshu Univ, Fac Engn, Nagano 3808553, JapanIPICyT, Adv Mat Dept, Lomas Secc 4A, San Luis Potosi 78216, SLP, MexicoMIT, Cambridge, MA 02139, USAEndo, M, Shinshu Univ, Fac Engn, 4-17-1 Wakasato, Nagano 3808553, Japan TI - Applications of carbon nanotubes in the twenty-first century AB - Carbon nanotubes. which consist of rolled graphene sheets built from sp(2) hybridized carbon atoms, are now attracting scientists from various disciplines due to their fascinating physico-chemical properties. In this account, we will review the recent progress on the synthetic techniques for the large-scale production of carbon nanotubes, especially focusing on the floating-catalyst method used in the chemical vapour deposition (CVD) process. We will also describe effective purification methods avoiding structural damage, and discuss the electrochemical applications of these systems including the fabrication of: (i) lithium-ion secondary batteries; (ii) lead-acid batteries; (iii) electric double-layer capacitors; (iv) fuel cells; and (v) multifunctional fillers in polymer composites. We foresee that carbon nanotubes will find numerous applications a,and take an important place in the development of emerging technologies iii the near future MH - Japan MH - Mexico|San Luis Potosi MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 26 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1364-503X UR - ISI:000224557900011 L2 - carbon nanotubes;chemical vapour deposition;growth;size-effects;LARGE-SCALE SYNTHESIS; ELECTROCHEMICAL STORAGE; CATALYTIC GROWTH; VAPOR-PHASE; SINGLE; PURIFICATION; LITHIUM; ELECTRODES; COMPOSITES; FILAMENTS SO - Philosophical Transactions of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 2004 ;362(1823):2223-2238 10683 UI - 4685 AU - Endo M AU - Hayashi T AU - Muramatsu H AU - Kim YA AU - Terrones H AU - Terrones M AU - Dresselhaus MS AD - Shinshu Univ, Fac Engn, Nagano 3808553, JapanIPIC&T, Adv Mat Dept, San Luis Potosi 78216, SLP, MexicoMIT, Cambridge, MA 02139, USAEndo, M, Shinshu Univ, Fac Engn, 4-17-1 Wakasato, Nagano 3808553, Japan TI - Coalescence of double-walled carbon nanotubes: Formation of novel carbon bicables AB - Here, we demonstrate that by coalescing double-walled carbon nanotubes (DWNTs), a novel and stable structure consisting of flattened tubules containing two single-walled tubes (SWNTs) is created. The process occurs due to the coalescence and reconstruction of the outer shells of DWNTs, leaving the inner cylinders almost intact, the latter being encapsulated inside the large diameter coalesced tube (bicable). We propose that the coalescence process is due to: (1) the thermal activity of the outer shells, which is driven by a surface energy minimization process, and (2) a zipping mechanism followed by atom reconstruction, in which two outer shells interact and anneal MH - Japan MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000223292800015 L2 - RAMAN-SCATTERING; FULLERENES; C-60 SO - Nano Letters 2004 ;4(8):1451-1454 10684 UI - 5574 AU - Endress BA AU - Gorchov DL AU - Peterson MB AD - Miami Univ, Dept Bot, Oxford, OH 45056, USAMiami Univ, Dept Geog, Oxford, OH 45056, USAEjido Alta Cima, Gomez Farias, Tamaulipas, MexicoEndress, BA, Pacific NW Res Stn, 1401 Gekeler Lane, La Grande, OR 97850 USA TI - Harvest of the palm Chamaedorea radicalis, its effects on leaf production, and implications for sustainable management AB - Few studies have integrated local management strategies with ecological experiments to assess the harvest and management of nontimber forest products, even though nontimber forest resources are primarily managed by local communities. To understand the harvest and management of leaves from the understory palm Chamaedorea radicalis Mart. in the El Cielo Biosphere Reserve, Mexico, we documented local management practices and used this information to conduct an experiment to examine the effect of several leaf-harvest regimes on leaf production, length, and yield. We interviewed palm harvesters to document harvest and management strategies and collected data on the number of leaves sold by 12 harvesters over 32 months to estimate the number of leaves harvested per year in the community of Alta Cima. In January 1999, we established 10 study plots (50 palms/plot; n = 500) to conduct our harvest experiment. Plots were divided into subplots of 10 palms each, and treatments were randomly assigned to subplots. The treatments were as follows: control, 1 x /year, 2 x /year, and 4 x /year harvest, and a modified 4 x /year harvest, during which one leaf at most was removed each time. Leaf production, length, and yield were recorded through August 2001. Palm harvesting was intense, with an average of 4000 leaves harvested per collector per month. Harvest resulted in a modest increase in leaf production; however, leaves produced in the harvest treatments were significantly shorter than those in the control. This reduction in leaf length led to a 41-68% decline in yield after 2 years because many leaves produced were too short to be marketable. This response suggests that leaf harvesting is not a stable source of income for communities in El Cielo. Because we tailored our experimental treatments to approximate current harvest practices and potentially acceptable alternatives, our results were directly relevant to communities and interpretable within the local context MH - Mexico|Tamaulipas MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 12 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0888-8892 UR - ISI:000221353300030 L2 - El Cielo Biosphere Reserve;leaf harvest;Mexico;nontimber forest products;palm leaves;sustainable management;Tamaulipas;EXTRACTIVE RESERVES; TROPICAL FORESTS; UNDERSTORY PALM; MEXICO; CONSERVATION; DEFOLIATION; ARECACEAE; REPRODUCTION; SURVIVAL; SYSTEMS SO - Conservation Biology 2004 ;18(3):822-830 10685 UI - 4863 AU - Enger KS AU - Ordonez R AU - Wilson ML AU - Ramsey JM AD - Inst Nacl Salud Publ, Dept Med Entomol, Cuernavaca 62508, Morelos, MexicoEnger, KS, Univ Michigan, Dept Epidemiol, Ann Arbor, MI 48109, USA TI - Evaluation of risk factors for rural infestation by Triatoma pallidipennis (Hemiptera : Triatominae), a Mexican vector of Chagas disease AB - Control of Chagas disease requires control of its triatomine vectors, which requires an understanding of the determinants of infestation. Twenty-seven household environmental characteristics in the town of Chalcatzingo, Morelos, were analyzed for association with infestation by Triatoma pallidipennis, the predominant local vector. Data were obtained through timed household searches for triatomines and surveys that characterized intradomicile and peridomicile environments. Of the households surveyed, 28.4% were infested by T pallidipennis. Cross-sectional multivariate logistic regression analyses were performed that regressed infestation on environmental variables. Of the 530 households in the town, 84% had sufficient data to be included. Adobe walls, agricultural products, junk piles, lack of bednets, and number of rabbits were significantly associated with intradomiciliary infestation. junk piles and numbers of dogs, cats, and rabbits were significantly associated with peridomiciliary infestation. junk piles, agricultural products, and numbers of cats, rabbits, and birds were significantly associated with overall infestation. Unexpectedly, presence of stone piles was not associated with infestation. The results of this study provide information for designing Chagas disease control programs in rural Mexican areas infested by T pallidipennis MH - Mexico|Morelos MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000222901800032 L2 - Triatoma pallidipennis;triatomine;risk factor analysis;Chagas disease;vector ecology;TRYPANOSOMA-CRUZI; REDUVIIDAE; TRANSMISSION; POPULATIONS; INFECTION SO - Journal of Medical Entomology 2004 ;41(4):760-767 10686 UI - 3791 AU - Enqvist K AU - Mazumdar A AU - Perez-Lorenzana A AD - Univ Helsinki, Dept Phys Sci, FIN-00014 Helsinki, FinlandHelsinki Inst Phys, FIN-00014 Helsinki, FinlandMcGill Univ, CHEP, Montreal, PQ H3A 2T8, CanadaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoEnqvist, K, Univ Helsinki, Dept Phys Sci, POB 9, FIN-00014 Helsinki, Finland TI - Dumping inflaton energy density out of this world AB - We argue that a brane-world with a warped, infinite extra dimension allows for the inflaton to decay into the bulk so that after inflation, the effective dark energy disappears from our brane. This is achieved by shifting away the decay products into the infinity of the 5th dimension. As a consequence, all matter and CMB density perturbations could have their origin in the decay of a MSSM flat direction rather than the inflaton. We also discuss a string theoretical model where reheating after inflation may not affect the observable brane MH - Canada MH - Finland MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000225440900019 L2 - INVERSE-SQUARE LAW; EXTRA DIMENSIONS; COSMOLOGY; BRANE; UNIVERSE SO - Physical Review D 2004 ;70(10): 10687 UI - 5740 AU - Enriquez-Andrade RR AU - Vaca-Rodriguez JG AD - Univ Autonoma Baja California, Ensenada, Baja California, MexicoPrograma Nacl Aprovechamiento Atud & Protecc Delf, Ensenada, Baja California, MexicoEnriquez-Andrade, RR, PMB 302,416 W San Ysidro Blvd,Ste L, San Ysidro, CA 92173 USA TI - Evaluating ecological tradeoffs in fisheries management: a study case for the yellowfin tuna fishery in the Eastern Pacific Ocean AB - Multiobjective decision analysis (MDA) is a useful assessment method when fishery managers need a systematic investigation of the tradeoffs involved in the selection of alternative policy options. An important class of techniques within MDA is vector optimization, consisting of mathematical programming models with vector valued objective functions. From the management perspective, vector optimization models are particularly suited for situations when the decision rule requires each objective to be kept as high (or low) as possible. Solving vector optimization problems usually entails finding a set of Pareto-optimal solutions. These solutions are relevant to the decision-making process specially if decision-makers have monotonic preferences. In this paper, a vector optimization model of the Eastern Pacific yellowfin tuna fishery is used to generate Pareto-optimal solutions and to evaluate the tradeoffs (shadow prices) involved in the selection of alternative policy options. Three conflicting biological objectives are considered: (a) minimizing dolphin incidental mortality, (b) minimizing by-catch of all non-dolphin species and (c) maximizing total yellowfin tuna catch. Results are presented and discussed by means of non-linear tradeoff curves. (C) 2004 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Economics;Environmental Sciences;Environmental Studies U5 - J;Article AV - English IS - 0921-8009 UR - ISI:000220762500003 L2 - multiobjective decision analysis;by-catch in fisheries;tuna-dolphin controversy;IMPACTS SO - Ecological Economics 2004 ;48(3):303-315 10688 UI - 4611 AU - Enriquez S AU - Marba N AU - Cebrian J AU - Duarte CM AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Cancun 77500, Quintana Roo, MexicoCSIC, CEAB, Blanes 17300, Girona, SpainEnriquez, S, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Unidad Acad Puerto Morelos, Apdo Postal 1152, Cancun 77500, Quintana Roo, Mexico TI - Annual variation in leaf photosynthesis and leaf nutrient content of four Mediterranean seagrasses AB - We examine here the annual variation in leaf photosynthesis and nutrient status of four temperate seagrass species: Posidonia oceanica, Cymodocea nodosa, Zostera noltii, and Zostera marina. We also examine the relationship between leaf photosynthesis and seasonal plant growth and productivity. The four seagrass species examined cooccurred in a shallow protected cove on the NE Spanish Mediterranean coast. The results presented give evidence of large annual variation in the leaf physiological status of these four seagrasses, as well as the occurrence of significant differences in the seasonal pattern among species. We found two contrasting seasonal patterns characterized by optimal leaf photosynthesis in summer (represented by C. nodosa), and winterautumn (represented by P. oceanica and Z. noltii). These contrasting patterns corresponded with a differential plant dependence on climate fluctuations (described by temperature and irradiance) vs. speciesspecific nutrient status (described by leaf nutrient content). As plant nutrient status results from speciesspecific differences in nutrient requirements, nutrient uptake efficiency, and internal nutrient economy, we conclude that the variation among species found in leaf nutrient content derives from speciesspecific responses to environmental forcing. Consequently, we can infer that an important fraction of the seasonal variability that seagrasses show may be related to speciesspecific responses. We also found significant differences among species in the coupling between leaf photosynthesis and plant growth and productivity. Both aspects, speciesspecific responses to environmental forcing and speciesspecific coupling between leaf photosynthesis and plant growth may result in differential seasonal patterns of growth and productivity among seagrass species MH - Mexico|Quintana Roo MH - Spain PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000223556000005 L2 - leaf photosynthetic status;nutrient status;plant growth;seagrasses;seasonality;ZOSTERA-MARINA L; THALASSIA-TESTUDINUM; POSIDONIA-OCEANICA; WESTERN-AUSTRALIA; L EELGRASS; GROWTH; LIGHT; TEMPERATURE; DYNAMICS; BIOMASS SO - Botanica Marina 2004 ;47(4):295-306 10689 UI - 2561 AU - Erler J AU - Ramsey-Musolf MJ AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoCALTECH, Kellogg Radiat Lab, Pasadena, CA 91125, USAUniv Connecticut, Dept Phys, Storrs, CT 06269, USAErler, J, Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico TI - Low energy tests of the weak interaction AB - The study of low energy weak interactions of light quarks and leptons continues to provide important insights into both the Standard Model as well as the physics that may lie beyond it. We review the status and future prospects for low energy electroweak physics. Recent important experimental and theoretical developments are discussed and open theoretical issues are highlighted. Particular attention is paid to neutrino physics, searches for permanent electric dipole moments, neutral current tests of the running of the weak mixing angle, weak decays, and muon physics. We argue that the broad range of such studies provides an important complement to high energy collider searches for physics beyond the Standard Model. The use of low energy weak interactions to probe novel aspects of hadron structure is also discussed. (c) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - S;Review AV - English IS - 0146-6410 UR - ISI:000228298300001 L2 - precision electroweak tests;standard model;fundamental symmetries;ELECTRIC-DIPOLE MOMENT; DOUBLE-BETA DECAY; SUPERSYMMETRIC STANDARD MODEL; NONCONSERVING OPTICAL-ROTATION; CHIRAL PERTURBATION-THEORY; SOLAR-NEUTRINO DATA; ATOMIC PARITY NONCONSERVATION; HIGH-PRECISION MEASUREMENT; PROTON-PROTON-SCATTERING; SUPERGAUGE INVARIANT EXTENSION SO - Progress in Particle and Nuclear Physics, Vol 54, No 2 2004 ;54(2):351-442 10690 UI - 6519 AU - Escalante S AU - Montana C AU - Orellana R AD - Ctr Invest Cient Yucatan, Merida 97310, Yucatan, VenezuelaInst Ecol, Xalapa 91000, Veracruz, MexicoEscalante, S, Ctr Invest Cient Yucatan, AC Apartado Postal 87, Merida 97310, Yucatan, Venezuela TI - Demography and potential extractive use of the liana palm, Desmoncus orthacanthos Martius (Arecaceae), in southern Quintana Roo, Mexico AB - In order to evaluate the extractive use potential of Desmoncus orthacanthos, various matrix models were employed to assess population structure and dynamics. To this end, populations of this liana palm were investigated in southern Quintana Roo, Mexico, at two localities showing contrasting fragmentation levels arising from different land use regimes. In one case continuous forest (CF) are maintained under forestry management, while in the other (fragmented forest, FF) isolated forest patches remain inside of a matrix of crop and livestock lands. Three forest conditions: mature forest (MF), young forest (YF) and forest edge (FE) were nested in each fragmentation level. Results showed that more plants were encountered under FF situations than under CF conditions; however, no differences were noted in exploitable shoots (i.e., total numbers and lengths) when both were compared. Under forest conditions, number and length of exploitable shoots did not differ between FE and MF populations, however these values were smallest in YF populations. Intrinsic population growth rates (lambda) were lower under FF than under CF, as reflected by periodic matrix values of 0.964 and 1.594, respectively. With respect to forest conditions, lambda for FE > lambda for YF > lambda for MF and periodic matrix values were 1.441, 1.193 and 1.075, respectively. Elasticity analyses for annual matrices showed that the demographic process having most influence on variations in lambda was (periodic matrix values) permanence (43-63%), followed by growth and retrogression (15-22% and 14-23%, respectively); fecundity had the lowest influence in changes of lambda-values (8-13%). Analyses of the simulated extraction of shoots greater than or equal to5 m suggested that FE and CF populations might support harvest rates of 40% per year, since lambda > 1; however, simulation of harvest rates as low as 20% in other populations always resulted in lambda < 1. Interestingly, the simulated addition of nursery-raised juveniles resulted in a notable increase in lambda, especially for FE populations; simulations combining shoot extraction with the addition of juveniles suggested that high levels of harvest may be possible, even while maintaining lambda > 1; but only if sound forest management is practiced and agricultural fires are restricted. This work showed the value of matrix models for analyzing populations dynamics in establishing sustainable use strategies for D. orthacanthos as opposed to static evaluation of population numbers. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Veracruz MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000187914800001 L2 - demography;Desmoncus;extractive use;lianas;matrix models;matrix transition elasticities;non-timber forest products;palms;Quintana Roo;CARIBBEAN HURRICANES; SENSITIVITY ANALYSIS; POPULATION-GROWTH; MATRIX MODELS; FINITE RATE; FOREST; ELASTICITY; CONSERVATION; MANAGEMENT; ABUNDANCE SO - Forest Ecology and Management 2004 ;187(1):3-18 10691 UI - 6143 AU - Escalante SGL AU - Dominquez G AU - Touchard G AD - Inst Tecnol Celaya, Dept Mecan, Celaya, Gto, MexicoUniv Poitiers, Grp Electrofluidodynam, CNRS, UMR 6609,Lab Etud Aerodynam, F-86962 Poitiers, FranceDominquez, G, Inst Tecnol Celaya, Dept Mecan, Av Tecnol & A Garcia Cubas S-N, Celaya, Gto, Mexico TI - Electrostatic phenomena in fluidized beds and new method for measuring the minimal fluidization velocity in particulate matter AB - We have used the electric current measure obtained from a porous electrode, to determine the minimal fluidization speed of a fluidized particles column. When gas speed (U-g) is inferior to the minimal fluidization speed (U-mf), particles stay without motion. Increasing gas speed (U-g greater than or equal to U-mf), the particles column initiates motion and a weak electric current appear caused by collisions of particles onto the electrode. To determine U-mf we have applied the gradual depressurization method. Current is measured from the bottom electrode every depressurization step, variation of current allows to determine U-mf. Results obtained are compared with some literature results from Richardson classical method. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - French IS - 0304-3886 UR - ISI:000189095600001 L2 - fluidization;fluidized beds;tribocharging of powders;PARTICLE; PRESSURES SO - Journal of Electrostatics 2004 ;60(1):1-13 10692 UI - 4642 AU - Escobar A AU - Schimmel KA AU - de Gyves J AU - San Miguel ERD AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, MexicoUniv Juarez Autonoma Tabasco, Div Acad Ciencias Basicas, Tabasco, MexicoN Carolina Agr & Tech State Univ, Dept Chem Engn, Greensboro, NC 27411, USAUNAM, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, MexicoSan Miguel, ERD, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Analit, Mexico City 04510, DF, Mexico TI - Hollow-fiber dispersion-free extraction and stripping of Pb(II) in the presence of Cd(II) using D2EHPA under recirculating operation mode AB - Lead(II) and cadmium(II) solvent extraction (SX) with D2EHPA dissolved in heptane and kerosene from aqueous chloride media was studied. Extraction reaction stoichiometries and extraction equilibrium constants were evaluated. Application of a dispersion-free membrane-based extraction and stripping technique with two hollow-fiber contactors under recirculating operation mode allowed a quantitative ( > 97%) removal of lead from the aqueous solution in the extraction module with a separation factor of 19 and a 62% recovery in the back-extraction module with a separation factor of 6.3 after 7 h under optimum conditions. Mass-transfer coefficients for the system were evaluated. Optimal conditions for transport and separation are reported and compared using SX and the membrane-based technique. (C) 2004 Society of Chemical Industry MH - Mexico|Distrito Federal MH - Mexico|Tabasco MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0268-2575 UR - ISI:000223418700006 L2 - lead;cadmium;non-dispersive solvent extraction;hollow-fiber membrane;NONDISPERSIVE SOLVENT-EXTRACTION; SUPPORTED LIQUID-MEMBRANES; AQUEOUS-SOLUTIONS; DI(2-ETHYLHEXYL)PHOSPHORIC ACID; PHOSPHORIC-ACID; METAL-ION; SEPARATIONS; CADMIUM(II); RECOVERY; MEDIA SO - Journal of Chemical Technology and Biotechnology 2004 ;79(9):961-973 10693 UI - 5783 AU - Escobar G AU - Stankovic AM AU - Mattavelli P AD - Res Inst Sci & Technol San Luis Potosi, Dept Appl Math, IPICYT, San Luis Potosi 78216, MexicoNortheastern Univ, Dept Elect & Comp Engn, Boston, MA 02115, USAUniv Udine, Dept Elect Mech & Management Engn, DIEGM, I-33100 Udine, ItalyEscobar, G, Res Inst Sci & Technol San Luis Potosi, Dept Appl Math, IPICYT, San Luis Potosi 78216, Mexico TI - An adaptive controller in stationary reference frame for D-Statcom in unbalanced operation AB - This paper presents a passivity-based controller for a Distribution Static synchronous Compensator (D-Statcom) aimed at compensating reactive power and unbalanced harmonics in the general case of distorted and unbalanced source voltages and load currents. The proposed approach is based on the measurements of line currents, and ensures precise compensation for selected harmonics. Moreover, in order to compensate for the unavoidable uncertainty in certain system parameters, adaptation is added to the passivity-based controller. One of the major advantages of the proposed solution compared to conventional alternatives is that we are able to perform precise tracking (including higher order harmonics) even in the presence of a relatively low switching frequency, i.e., in the presence of an inverter with limited bandwidth. Simulation and experimental results are provided to illustrate the merits of our solution MH - Italy MH - Mexico|San Luis Potosi MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0278-0046 UR - ISI:000220656700016 L2 - active filters;adaptive control;dissipative systems;nonlinear systems;reactive power control;ACTIVE-FILTERS; CONVERTERS; INVERTERS; MODEL SO - Ieee Transactions on Industrial Electronics 2004 ;51(2):401-409 10694 UI - 4485 AU - Esparza JM AU - Ojeda ML AU - Campero A AU - Dominguez A AU - Kornhauser I AU - Rojas F AU - Vidales AM AU - Lopez RH AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas Ingn, DH Everett Chair, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Dept Fis, RA-5700 San Luis, ArgentinaRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Div Ciencias Basicas Ingn, DH Everett Chair, POB 55-534, Mexico City 09340, DF, Mexico TI - N-2 sorption scanning behavior of SBA-15 porous substrates AB - The independent non-intersecting cylindrical pore nature of SBA-15 materials represents, in principle, a very adequate experimental system to analyze the N-2 sorption scanning behavior according to the theorems of the Independent Domain Theory of Sorption Hysteresis. In this work, SBA-15 materials of two general types have been synthesized: (i) substrates made by hexagonal arrays of cylinders of about the same sizes, and (ii) solids including a relatively wide distribution of cylindrical pores of varying diameters arranged in a fairly distorted hexagonal packing. Boundary and primary N-2 sorption scanning curves have been experimentally determined on all these materials in order to observe the possible irruption of cooperative processes during the filling and emptying of tubular SBA-15 pores. Pore domain complexion diagrams (i.e. graphs indicating the amount of pore sizes that are occupied by condensate or vapor) have been constructed by means of Non-Local Density Functional Theory calculations of the pore-size distributions that are incumbent to both boundary and primary scanning curves. It has been inferred that two phenomena branded as advanced adsorption and single pore-blocking can take place in reason of the undulating cross-section nature of some SBA-15 tube materials; the extents of the above irreversible processes depending on the degree of sinuosity of the cross sections of the tubes. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000223714100006 L2 - sorption scanning curves;SBA-15 materials;advanced adsorption;single pore-blocking;pore domain complexion diagrams;DENSITY-FUNCTIONAL THEORY; PORE-SIZE DISTRIBUTIONS; CAPILLARY CONDENSATION; MESOPOROUS SILICA; DOMAIN COMPLEXIONS; BOUNDARY CURVE; NETWORK MODEL; ADSORPTION; HYSTERESIS; COPOLYMER SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2004 ;241(1-3):35-45 10695 UI - 5912 AU - Espejo-Serna A AU - Lopez-Ferrari AR AU - Ugarte IS AD - UAM Iztapalapa, Div CBS, Depto Biol, Mexico City, DF, MexicoUNAM, FES Zaragoza, Carrera Biol, Zaragoza, SpainEspejo-Serna, A, UAM Iztapalapa, Div CBS, Depto Biol, Mexico City, DF, Mexico TI - A current estimate of angiosperm diversity in Mexico AB - The importance of documenting the plants of Mexico is undeniable considering its status as a country with biological megadiversity on one hand and the accelerated destruction of its ecosystems on the other. Ten years ago we started to compile species lists and literature for the rnonocotyledons that grow in Mexico, in an attempt to at least partially remedy the current lack of botanical knowledge that exists in the country. Individual electronic databases of nomenclature, bibliography, and herbarium specimens were developed. Currently these databases contain 15,560, 6,700, and 42,000 records, respectively. To date we have registered for the country 4,529 species (or 4,797 taxa including subspecies and varieties) distributed in 619 genera and 60 families (sensu Dahlgren & al., 1985). Of the total number of families, seven include only introduced representatives, whereas the other 53 possess at least some native species. The number of native species is 4,424 (4,693 taxa including subspecies and varieties). A comparison of the data obtained by us together with data reported in various floristic lists of Mexican states, as well as that from some completed regional floras, allows us to obtain statistical estimates that indicate Mexico should possess between 21,300 and 24,601 species of angiosperms. As a final perspective on the importance of the Mexican flora, if the estimate of number of seed plant species in the world is really 223,300 (Scotland & Wortley, 2003), and if we accept the estimate of number of species for Mexico as 24,601, then Mexico would have 11.01% of the total seed plant species diversity of the entire planet MH - Mexico|Distrito Federal MH - Spain PB - VIENNA: INT ASSOC PLANT TAXONOMY RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0040-0262 UR - ISI:000220284300015 L2 - angiosperms;biodiversity;Mexico;SEED PLANTS SO - Taxon 2004 ;53(1):127-130 10696 UI - 5835 AU - Espinosa-Carreon TL AU - Strub PT AU - Beier E AU - Ocampo-Torres F AU - Gaxiola-Castro G AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoOregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331, USAEspinosa-Carreon, TL, Ctr Invest Cient & Educ Super Ensenada, Km 107 Carr, Ensenada, Baja California, Mexico TI - Seasonal and interannual variability of satellite-derived chlorophyll pigment, surface height, and temperature off Baja California AB - Mean fields, seasonal cycles, and interannual variability are examined for fields of satellite-derived chlorophyll pigment concentrations (CHL), sea surface height (SSH), and sea surface temperature (SST) during 1997-2002. The analyses help to identify three dynamic regions: an upwelling zone next to the coast, the Ensenada Front in the north, and regions of repeated meanders and/or eddy variability west and southwest of Point Eugenia. High values of CHL are found in the upwelling zone, diminishing offshore. The exception is the area north of 31degreesN (the Ensenada Front), where higher CHL are found about 150 km offshore. South of 31degreesN, the long-term mean dynamic topography decreases next to the coast, creating isopleths of height parallel to the coastline, consistent with southward geostrophic flow. North of 31degreesN the mean flow is toward the east, consistent with the presence of the Ensenada Front. The mean SST reveals a more north-south gradient, reflecting latitudinal differences in surface heating due to solar radiation. Harmonic analyses and EOFs reveal the seasonal and interannual patterns, including the region of repeated eddy activity to the west and southwest of Point Eugenia. A maximum CHL occurs in spring in most of the inshore regions, reflecting the growth of phytoplankton in response to the seasonal maximum in upwelling-favorable winds. SST and SSH anomalies are negative in the coastal upwelling zone in spring, also consistent with a response to the seasonal maximum in upwelling. When the seasonal cycle is removed, the strongest signal in the EOF time series is the response to the strong 1997 1998 El Nino, with a weaker signal representing La Nina (1998-1999) conditions. El Nino conditions consist of low chlorophyll, high SSH, and high SST, with opposite conditions during La Nina MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 12 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000220623000005 L2 - chlorophyll;El Nino;La Nina;Baja California;California Current;1997-98 EL-NINO; CURRENT SYSTEM; MESOSCALE EDDY; NONSEASONAL VARIABILITY; ENSENADA FRONT; JULY 1985; PHYTOPLANKTON; EVOLUTION; STATE; TRANSITION SO - Journal of Geophysical Research-Oceans 2004 ;109(C3): 10697 UI - 4852 AU - Espinosa JMM AU - Fanchon J AU - Drira K AD - ITESM CCM, Mexico City 14380, DF, Mexico. CNRS, LAAS, F-31077 Toulouse 04, France TI - The internal-local-remote dependency model for generic coordination in distributed collaboration sessions AB - This paper considers Distributed Collaboration Sessions (DCS) where distributed users interact through multi-component communicating applications. The paper develops a formal framework that identifies the dependency relationships and the associated coordination rules that should be considered in controlling and managing the interactions between the actors of DCS including software components and human users. Components of the same application are associated with the same category. The users constitute a unique category of actors. We identify three classes of dependency relationships: (1) internal dependency relationship dealing with constraints related to the intra-actor level. (2) local dependency relationship dealing with constrains related to the intrasite level. (3) remote dependency relationship dealing with constraints related to the intra-category level. These three relationship classes are then applied to define dependency management laws for session management including controlling state change, communication scope, role distribution and group membership. Building the multi-actors interdependencies management rules is achieved by composing elementary dependencies relationships that we express as first order logic formula MH - France MH - Mexico|Distrito Federal T3 - ADVANCED DISTRUBUTED SYSTEMSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlejose.molina@itesm.mx fanchon@laas.fr drira@laas.fr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAM55 AV - English IS - 030English2-9743 UR - ISI:000222840200015 SO - 2004 ;():158-169 10698 UI - 4711 AU - Espinoza H AU - Abuabara K AU - Ellertson C AD - Populat Council, Reg Off Latin Amer & Caribbean, Mexico City 04000, DF, MexicoIbis Reprod Hlth, Cambridge, MA 02138, USAEspinoza, H, Populat Council, Reg Off Latin Amer & Caribbean, Panzacola 62 Interior 102 Col Villa Coyoacan, Mexico City 04000, DF, Mexico TI - Physicians' knowledge and opinions about medication abortion in four Latin American and Caribbean region countries AB - To examine physicians' knowledge and attitudes in regard to medication abortion, we conducted focus-group discussions with general practice physicians and obstetrician-gynecologists in Honduras, Mexico, Nicaragua and Puerto Rico. Physicians were familiar with the practice of several types of medication and surgical abortion methods. Medication abortion with misoprostol is most common among women of higher socioeconomic status and is prescribed by physicians, pharmacists or self-administered. Conflicting opinions regarding safety, efficacy, cost, potential for self-medication and acceptability emerged; some participants expressed hope that medical abortion would reduce the risks associated with unsafe abortion, while others contended that drug distribution and self-medication without proper counseling could be problematic. Participants noted a lack of reliable sources of information for both providers and women, and expressed interest in strategic dissemination of information. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000223181600008 L2 - abortion;Latin America;medical abortion;medication abortion;qualitative study;SURGICAL ABORTION; ILLEGAL ABORTION; MISOPROSTOL; PREGNANCY; BRAZIL; EFFICACY SO - Contraception 2004 ;70(2):127-133 10699 UI - 3523 AU - Esqueda M AU - Moreno G AU - Perez-Silva E AU - Sanchez A AU - Altes A AD - Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Alcala de Henares, Dept Biol Vegetal, E-28871 Alcala De Henares, SpainUniv Nacl Autonoma Mexico, Lab Micol, Mexico City 04510, DF, MexicoEsqueda, M, Ctr Invest Alimentac & Desarrollo, AC Apartado Postal 1735, Hermosillo 83000, Sonora, Mexico TI - The genus Tulostoma in Sonora, Mexico AB - Seventeen species of Talostoma from 92 collections found in Sonora (Mexico) were studied. Four species: Telustoma cyclophorum, T. floridanum, T involucratum, and T. squamosum are new records for Mexico. Most of the studied material was collected in microphyllous desert scrub and tropical thorn forest during summer and winter. Tulostoma fimbriatum was the only species observed in arid, semiarid and temperate areas. Tulostoma floridanum and T. squamositin showed a restricted distribution in tropical deciduous forest. SEM photographs of spore ornamentation are provided MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000226154100022 L2 - chorology;spore ornamentation;SEM;taxonomy;Tulostomataceae SO - Mycotaxon 2004 ;90(2):409-422 10700 UI - 5514 AU - Esquivel JCC AU - Voget CE AD - Natl Univ La Plata, Fac Ciencias Exactas, CINDEFI, CONICET, RA-1900 La Plata, ArgentinaUniv Autonoma Coahuila, Fac Ciencias Quim, Dept Invest & Alimentos, Saltillo, Coahuila, MexicoVoget, CE, Natl Univ La Plata, Fac Ciencias Exactas, CINDEFI, CONICET, 47 & 115, RA-1900 La Plata, Argentina TI - Purification and partial characterization of an acidic polygalacturonase from Aspergillus kawachii AB - An endo-polygalacturonase, named PGI, was purified to homogeneity from the culture filtrate of Aspergillus kawachii IFO4033 grown in a glucose-tryptone medium. The molecular mass of PGI was estimated to be 60 kDa by SDS-PAGE and 40 kDa by gel filtration on Sephacryl S-100. The isoelectric point was 3.55 as determined by isoelectic focusing. PGI exhibited binding properties to ConA-Sepharose suggesting that the protein is glycosylated. The N-terminal amino acid sequence was also determined as S-T-C-T-F-T-D-A-A-T-A-S-E-S-K. The remarkable property of PGI was its high activity in the pH range 2.0-3.0 towards soluble and insoluble substrates, while being inactive at pH 5.0. Enzyme stability at low pHs was markedly enhanced by different compounds, such as proteins, polysaccharides, simple sugars and the substrate pectin. PGI was very efficient to extract pectin from lemmon protopectin and to macerate carrot tissues at pH 2.0. These properties make PGI an interesting biocatalyst for industrial applications under highly acidic conditions. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0168-1656 UR - ISI:000221492900003 L2 - pectin;acidic enzymes;endo-polygalacturonase;Aspergillus kawachii;ALPHA-AMYLASES; PROTOPECTINASE; PECTIN; NIGER SO - Journal of Biotechnology 2004 ;110(1):21-28 10701 UI - 4969 AU - Esquivel R AU - Svetovoy VB AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Twente, EWI, Transducers Sci & Technol Grp, NL-7500 AE Enschede, NetherlandsEsquivel, R, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Correction to the Casimir force due to the anomalous skin effect AB - The surface impedance approach is discussed in connection with the precise calculation of the Casimir force between metallic plates. It allows us to take into account the nonlocal connection between the current density and electric field inside of metals. In general, a material has to be described by two impedances Z(s)(omega,q) and Z(p)(omega,q) corresponding to two different polarization states. In contrast with the approximate Leontovich impedance they depend not only on frequency omega but also on the wave vector along the plate q. In this paper only the nonlocal effects happening at frequencies omega D-s(+)eta and (DK+)-K-0 AB - We report the first observation of a charm-strange meson D-sJ(+)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(s)(+)eta and (DK+)-K-0. In the D(s)(+)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode (DK+)-K-0. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma((DK+)-K-0)/Gamma(D(s)(+)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(s)(+)eta decay mode MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 30 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000225661100013 L2 - HEAVY-QUARK SYMMETRY SO - Physical Review Letters 2004 ;93(24): 10713 UI - 4361 AU - Ewers FW AU - Lopez-Portillo J AU - Angeles G AU - Fisher JB AD - Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824, USAInst Ecol AC, Xalapa 91070, Veracruz, MexicoFairchild Trop Garden, Miami, FL 33156, USAEwers, FW, Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA TI - Hydraulic conductivity and embolism in the mangrove tree Laguncularia racemosa AB - We measured xylem pressure potentials, soil osmotic potentials, hydraulic conductivity and percent loss of conductivity (PLC) due to embolism, and made microscopic observations of perfused dye in the white mangrove tree, Laguncularia racemosa (L.) Gaertn. f., (1) to determine its vulnerability to air embolism compared with published results for the highly salt-tolerant red mangrove tree, Rhizophora mangle L., and (2) to identify possible relationships between air embolism, permanent blockage of vessels and stem diameter. Laguncularia racemosa was more vulnerable to embolism than reported for R. mangle, with 50 PLC at -3.4 MPa. Narrow stems (5-mm diameter) had higher PLC than larger stems (8.4-or 14-mm diameter) of the same plants. Basic fuchsin dye indicated that up to 89% of the vessels, especially in the narrow stems, had permanent blockage that could not be reversed by high pressure perfusion. Air embolism could lead to permanent vessel blockage and eventual stem mortality. Such vulnerability to embolism may restrict the growth of L. racemosa and limit its distribution to less salty areas of mangrove communities MH - Mexico|Veracruz MH - USA PB - VICTORIA: HERON PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Forestry U5 - J;Article AV - English IS - 0829-318X UR - ISI:000223934100014 L2 - differential mortality of stems;nonconductive xylem;specific conductivity;vulnerability curve;white mangrove;RIPARIAN COTTONWOODS; HYDROSTATIC PRESSURE; RHIZOPHORA-MANGLE; CONDUIT DIAMETER; WATER TRANSPORT; WOODY-PLANTS; XYLEM; CAVITATION; DROUGHT; VULNERABILITY SO - Tree Physiology 2004 ;24(9):1057-1062 10714 UI - 6011 AU - Excelente-Toledo CB AU - Jennings NR AD - LANIA AC, Natl LAb Adv Comp Sci, Xalapa 91090, Veracruz, MexicoUniv Southampton, Sch Elect & Comp Sci, IAM Grp, Southampton SO17 1BJ, Hants, EnglandExcelente-Toledo, CB, LANIA AC, Natl LAb Adv Comp Sci, Rebsamen 80, Xalapa 91090, Veracruz, Mexico TI - The dynamic selection of coordination mechanisms AB - This paper presents and evaluates a decision making framework that enables autonomous agents to dynamically select the mechanism they employ in order to coordinate their inter-related activities. Adopting this framework means coordination mechanisms move from the realm of something that is imposed upon the system at design time, to something that the agents select at run-time in order to fit their prevailing circumstances and their current coordination needs. Using this framework, agents make informed choices about when and how to coordinate and when to respond to requests for coordination. The framework is empirically evaluated, in a grid world scenario, and we highlight those types of environments in which it is effective MH - United Kingdom MH - Mexico|Veracruz PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Automation & Control Systems;Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 1387-2532 UR - ISI:000220170300002 L2 - multiagent systems;coordination;dynamic reasoning;decision making;coordination mechanisms;SYSTEMS; DESIGN; VIEW SO - Autonomous Agents and Multi-Agent Systems 2004 ;9(1-2):55-85 10715 UI - 2957 AU - ez-Ercilla M AU - Ros-Yanez T AU - Petrov R AU - Houbaert Y AU - Colas R AD - Univ Valladolid, Fac Ciencias, E-47011 Valladolid, SpainState Univ Ghent, Dept Met & Mat Sci, B-9052 Ghent, BelgiumUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, NL, MexicoDiez-Ercilla, M, Univ Valladolid, Fac Ciencias, E-47011 Valladolid, Spain TI - Oxidation of silicon steels AB - The oxidation behaviour of a series of high silicon steels was studied by means of optical microscopy and scanning electron microscopy. The samples were cast with amounts of silicon that ranged from 3.3 to 11.6 wt-%. The experimental samples were cut from the ingots, polished and cleaned before placing them in an electric furnace at temperatures that varied from 1000 to 1230degreesC for a total time of 50 min. Specimens were then mounted and polished for examination. The analysis of X-ray spectra taken in different regions of the oxide crust indicated the presence of different oxide species. It was found that growth of the layer depended on the temperature at which the treatment was made, and on the amount of silicon in the steel, as it was found that the diffusion of silicon to form fayalite reduced the rate of growth MH - Belgium MH - Mexico|Nuevo Leon MH - Spain PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1478-422X UR - ISI:000227330900011 L2 - oxidation;diffusion;steels;annealing;ALLOYS SO - Corrosion Engineering Science and Technology 2004 ;39(4):295-300 10716 UI - 5892 AU - Fahong W AU - Wang X AU - Sayre K AD - CIMMYT Int, Mexico City 06600, DF, MexicoShandong Acad Agr Sci, Shandong 250100, Peoples R ChinaSayre, K, CIMMYT Int, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Comparison of conventional, flood irrigated, flat planting with furrow irrigated, raised bed planting for winter wheat in China AB - China is the most populous nation and largest food producer and consumer in the world. In terms of planted area and output, wheat (Triticum aestivum L.) (including both winter and spring habit wheat) is the number one crop in northern China, and currently almost all irrigated wheat is conventionally planted in narrow spaced rows on the flat and is irrigated by flood irrigation within bordered basins. Conventional flat planting for winter wheat has some disadvantages. The use of flood irrigation can result in a low potential irrigation water use efficiency and inefficient use of nitrogen. It can also cause crusting of the soil surface following irrigation and can contribute to the degradation of some soil properties. In addition, it can result in higher levels of crop lodging. A raised bed-planting system with a number of defined rows (usually two to four rows) planted on top of the bed with furrow irrigation was found to overcome these disadvantages. The benefits of the raised bed-planting system with furrow irrigation compared with conventional flat planting with flood irrigation were found as follows: first, there was a savings in some years of as much as 30% of applied irrigation water combined with enhanced water use efficiency by changing from flood to furrow irrigation; second, the crust problem on the soil surface was eliminated and soil physical status was greatly improved; third, nitrogen use efficiency could be improved by 10% or more because of improved nitrogen placement possibilities; fourth, the microclimate within the field was changed due to the orientation of the wheat plants in rows on the beds with the bed-planting system, which reduced crop lodging and decreased the incidence of some wheat diseases. These advantages, interacting together, were found to improve grain quality and increase grain yield by more than 10%. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000220394000004 L2 - winter wheat;furrow irrigation;bed planting;canopy microclimate;powdery mildew;sharp eyespot;NITROGEN USE EFFICIENCY; NITRATE; CORN SO - Field Crops Research 2004 ;87(1):35-42 10717 UI - 3674 AU - Falcon LI AU - Lindvall S AU - Bauer K AU - Bergman B AU - Carpenter EJ AD - San Francisco State Univ, Romberg Tiburon Ctr Environm Studies, Tiburon, CA 94920, USAUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Stockholm, Dept Bot, S-10691 Stockholm, SwedenCarpenter, EJ, San Francisco State Univ, Romberg Tiburon Ctr Environm Studies, Tiburon, CA 94920 USA TI - Ultrastructure of unicellular N-2 fixing cyanobacteria from the tropical North Atlantic and subtropical North Pacific Oceans AB - Nitrogen fixing unicellular marine cyanobacteria may have a major role in the global biogeochemistry of N; nevertheless, little is known about their phylogeny and morphology. We isolated N-2 fixing unicellular cyanobacteria from the tropical North Atlantic and subtropical North Pacific Oceans and examined ultrastructural dynamics during dark:light cycles when grown in incubators. The isolate from the subtropical North Pacific was larger and showed a size variation from 3 to 7 mum but had similar morphology and cell division-plane characteristics as the isolate from the North Atlantic (2.5 mum). Nitrogen fixation only occurred during the dark phase, and ultrastructural analysis demonstrated changes in the appearance and quantity of large carbohydrate-like granules present in the cells. To verify the composition of these carbohydrate-like granules, staining with periodic acid, thioacetic acid, and silver was carried out, and a positive reaction was obvious in all cells. The cells from the Atlantic seemed to empty their polysaccharide granules during the night, whereas those from the Pacific showed a decrease in the number of their granules. Our work suggests that phylogenetically related strains of unicellular N-2 fixing cyanobacteria from different oceans showed similar carbohydrate-like granules that could be used to fuel N-2 fixation during darkness MH - USA MH - Mexico|Distrito Federal MH - Sweden PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-3646 UR - ISI:000225633600008 L2 - nitrogen fixation;polysaccharide granules;ultrastructure;unicellular cyanobacteria;CYANOTHECE; FIXATION; MARINE; RHYTHMS SO - Journal of Phycology 2004 ;40(6):1074-1078 10718 UI - 3628 AU - Falconi M AU - Lacomba EA AU - Vidal C AD - UNAM, Fac Ciencias, Dept Math, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Math, Mexico City 09340, DF, MexicoUniv Fed Pernambuco, Dept Math, Recife, PE, BrazilFalconi, M, UNAM, Fac Ciencias, Dept Math, C Univ, Mexico City 04510, DF, Mexico TI - The flow of classical mechanical cubic potential systems AB - This paper describes the global flow of homogeneous polynomial potentials of degree 3 for negative and positive energy. For the negative energy case a blow up of McGehee type is enough to get the complete picture of the flow. In the positive energy case, McGehee blow up fails to give global information about the flow, but comparing with a separable case we are able to obtain all the possible asymptotic behavior of solutions, whenever the coefficients of the normal form of the potential are positive MH - Brazil MH - Mexico|Distrito Federal PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000225853500005 L2 - HOMOGENEOUS POTENTIALS SO - Discrete and Continuous Dynamical Systems 2004 ;11(4):827-842 10719 UI - 5684 AU - Faloh-Gandarilla JC AU - az-Castanon S AU - Leccabue F AU - Watts BE AD - Univ La Habana, Fac Fis, Inst Mat & React, Magnetism Lab, Havana 10400, CubaIPICyT, Mat Avanzados, San Luis Potosi, SLP, MexicoCNR, Inst Maspec, I-43010 Parma, ItalyDiaz-Castanon, S, Univ La Habana, Fac Fis, Inst Mat & React, Magnetism Lab, Havana 10400, Cuba TI - Magnetic properties of polycrystalline Sr-M and Pb-M hexaferrites thin films grown by pulsed laser deposition on Si/SiO2 substrates AB - Pulsed laser ablation deposition has been used to grow polycrystalline Pb-M and Sr-M thin films with high coercivity on Si/SiO2 substrates. The influence of the substrate temperature (550-800 degreesC) and the oxygen pressure (1.0-3.0 mbar) on the magnetic properties during the deposition is discussed. The Pb-M hexaferrite thin films crystallise at the same temperature range as Sr-M thin films, but with inferior coercivities. In both cases. the best values of iHc (3.8 kOe, Pb-M films and 5.0 kOe for Sr-M thin film) are very close to the best value of sintered ceramic hexaferrite (5.0 kOe Pb-M and 6.0 kOe Sr-M). The isotropic character of the films was confirmed by a Mr/Ms behaviour near to 0.5. (C) 2003 Elsevier B.V. All rights reserved MH - Cuba MH - Italy MH - Mexico|San Luis Potosi PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500048 L2 - M-type hexaferrites;hexaferrites thin films;permanent magnets;BARIUM; DECOMPOSITION SO - Journal of Alloys and Compounds 2004 ;369(1-2):195-197 10720 UI - 4261 AU - Farber-Lorda J AU - Lavin MF AU - Guerrero-Ruiz MA AD - CICESE, Div Oceanol, Ensenada, Baja California, MexicoFarber-Lorda, J, CICESE, POB 434844, San Diego, CA 92143, USA TI - Effects of wind forcing on the trophic conditions, zooplankton biomass and krill biochemical composition in the Gulf of Tehuantepec AB - The trophic conditions, the zooplankton biomass and the krill biochemical composition in the Gulf of Tehuantepec were studied in relation to spatial and temporal changes in the physical environment, caused by Norte winds. These winds, which occur mostly from October to March, are intermittent, strong wind jets that blow offshore and normal to the coast at the head of the Gulf of Tehuantepec. Ekman pumping raises the thermocline in the east and lowers it in the west of the jet axis; in the central region of the gulf, vertical mixing brings cool, nutrient-rich waters to the surface, enhancing biological productivity. Data from a January 1989 survey show that mean zooplankton biomass was highest in the central region, but there was no significant difference between the three regions (east, central and west). Among euphausiids, Euphausia lamelligera was the dominant species, with 92%. Mean particulate protein, lipids and particulate organic matter (POM = protein + carbohydrates + lipids) did not show significant differences among the three regions; however, mean particulate carbohydrates were significantly different. For the entire area, low but significant linear regressions between (ArcSin) lipids in euphausiids and lipids in POM, and between POM and (ArcSin) lipids in euphausiids were obtained. Better regressions between zooplankton biomass and POM and other variables were obtained when stations were analyzed by hydrographic regions. When data were grouped into those taken before and after a strong Norte (Leg I and Leg II, respectively), a significant positive regression was obtained between (ArcSin) krill lipids and POM for Leg I; but for Leg II, the slope, although not statistically significant, was negative. POM is apparently utilized during Leg II, but the response in the lipid content of the animals is evident only after some time has passed (during Leg I), when the animals had assimilated the food surplus. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700008 L2 - TROPICAL PACIFIC-OCEAN; SATELLITE-OBSERVATIONS; CENTRAL-AMERICA; OF-TEHUANTEPEC; MEXICO; COAST; JETS SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):601-614 10721 UI - 4262 AU - Farber-Lorda J AU - Trasvina A AU - Verdin PC AD - CICESE, Div Oceanol, Ensenada, Baja California, MexicoFarber-Lorda, J, CICESE, POB 434844, San Diego, CA 92143, USA TI - Trophic conditions and zooplankton distribution in the entrance of the Sea of Cortes during summer AB - The mouth of the Gulf of California has a complex hydrographic structure, with cool California Current waters, nutrient-rich Gulf of California water, and comparatively poor tropical waters arriving from the south. During the PATO II cruise to this region in June 1993, samples of zooplankton (between 0 and 200 m) and particulate matter from three depths, (1%, 10% and 100% light attenuation level (LAL)) were obtained. In the frontal areas near Capes San Lucas and Corrientes, particulate organic matter (POM = protein + carbohydrates) and zooplankton biomass increased. Particulate protein, carbohydrates and POM were significantly different between the three depths. Among the four transects investigated at the vicinity of the gulf mouth, only the northern one located across the entrance (109118 transect) showed highly significant multiple linear regressions between zooplankton biomass and POM at surface and 10% LAL, and also between zooplankton biomass and POM at surface and the 1 % LAL. Three water masses were individualized at the north, the south and the east of the area. Significant differences were found among them for zooplankton biomass, and for POM and protein, at the 1 % LAL. At the northern sector, significant linear regressions between zooplankton biomass and POM for the surface and 10% LAL were calculated, and significant multiple linear regressions were found between zooplankton biomass and POM for surface and the 10% LAL, respectively. For the eastern sector, other less significant multiple linear regressions were obtained among zooplankton biomass and POM at surface and the 1 % LAL. In the southern sector, a significant multiple linear regression between zooplankton biomass and protein at the three studied LAL's was found. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700009 L2 - MATTER SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):615-627 10722 UI - 5802 AU - Farfan-Ale JA AU - Blitvich BJ AU - Lorono-Pino MA AU - Marlenee NL AU - Rosado-Paredes EP AU - Garcia-Rejon JE AU - Flores-Flores LF AU - Chulim-Perera L AU - Lopez-Uribe M AU - Perez-Mendoza G AU - Sanchez-Herrera I AU - Santamaria W AU - Moo-Huchim J AU - Gubler DJ AU - Cropp BC AU - Calisher CH AU - Beaty BJ AD - Colorado State Univ, Arthropod Borne & Infect Dis Lab, Dept Microbiol Immunol & Pathol, Coll Vet Med & Biomed Sci, Ft Collins, CO 80523, USACtr Dis Control & Prevent, Div Vector Borne Infect Dis, Ft Collins, CO, USAUniv Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Lab Arbovirol, Merida, Yucatan, MexicoBeaty, BJ, Colorado State Univ, Arthropod Borne & Infect Dis Lab, Dept Microbiol Immunol & Pathol, Coll Vet Med & Biomed Sci, Ft Collins, CO 80523 USA TI - Longitudinal studies of West Nile virus infection in avians, Yucatan State, Mexico AB - Following the introduction of West Nile virus (WNV) into North America in 1999, surveillance for evidence of infection with this virus in migratory and resident birds was established in Yucatan State, Mexico in March 2000. Overall, 8611 birds representing 182 species and 14 orders were captured and assayed for antibodies to WNV. Of these, 5066 (59%) birds were residents and 3545 (41%) birds were migrants. Twenty-one (0.24%) birds exhibited evidence of flavivirus infection. Of these, 8 birds had antibodies to WNV by epitope-blocking enzyme-linked immunosorbent assay. Five (0.06%) birds (gray catbird, brown-crested flycatcher, rose-breasted grosbeak, blue bunting and indigo bunting) were confirmed to have WNV infections by plaque reduction neutralization test. The WNV-infected birds were sampled in December 2002 and January 2003. The brown-crested flycatcher and blue bunting presumably were resident birds; the other WNV seropositive birds were migrants. These data provide evidence of WNV transmission among birds in the Yucatan Peninsula MH - USA MH - Mexico|Yucatan PB - LARCHMONT: MARY ANN LIEBERT INC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 1530-3667 UR - ISI:000220590400001 L2 - West Nile virus;flavivirus;Mexico;bird;surveillance;MIGRATORY BIRDS; SEROLOGIC EVIDENCE; TRANSMISSION; ANTIBODIES; HORSES; SERUM SO - Vector-Borne and Zoonotic Diseases 2004 ;4(1):3-14 10723 UI - 5828 AU - Fargnoli MC AU - Piccolo D AU - Cuevas-Covarrubias SA AU - Peris K AD - Univ Aquila, Dept Dermatol, I-67100 Laquila, ItalyHosp Gen Mexico City, Serv Genet, Mexico City, DF, Mexico TI - Riud's syndrome MH - Italy MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Dermatology U5 - J;Meeting Abstract AV - English IS - 0190-9622 UR - ISI:000220140600148 SO - Journal of the American Academy of Dermatology 2004 ;50(3):38-38 10724 UI - 4274 AU - Farias LMB AU - Ocana DB AU - Diaz L AU - Larrea F AU - vila-Chavez E AU - Cadena A AU - Hinojosa LM AU - Lara G AU - Villanueva LA AU - Vargas C AU - Hernandez-Gallegos E AU - Camacho-Arroyo I AU - Duenas-Gonzalez A AU - Perez-Cardenas E AU - Pardo LA AU - Morales A AU - Taja-Chayeb L AU - Escamilla J AU - Sanchez-Pena C AU - Camacho J AD - IPN, Ctr Invest & Estudios Avanzados, Pharmacol Sect, Mexico City 07360, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador, Dept Biol Reprod, Mexico City, DF, MexicoHosp Gen Dr Manuel Gea Gonzalez, Dept Ginecol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Biol, Mexico City, DF, MexicoInst Nacl Cancerol, Inst Invest Biomed, Unidad Invest Biomed & Canc, Mexico City, DF, MexicoAbt Mol Biol Neuronaler Signale, Max Planck Inst Expt Med, Gottingen, GermanyCamacho, J, IPN, Ctr Invest & Estudios Avanzados, Pharmacol Sect, Mexico City 07360, DF, Mexico TI - Ether a go-go potassium channels as human cervical cancer markers AB - Ether a go-go (FAG) potassium channels display oncogenic properties. In normal tissues, EAG mRNA is almost exclusively expressed in brain, but it is expressed in several somatic cancer cell lines, including HeLa, from cervix. Antisense experiments against eag reduce cell proliferation in some cancer cell lines, and inhibition of EAG-mediated currents has been suggested to decrease cell proliferation in a melanoma cell line. Because of the potential clinical relevance of EAG, we investigated EAG mRNA expression in the following fresh samples from human uterine cervix: 5 primary cultures obtained from cancerous biopsies, I cancerous fresh tissue, and 12 biopsies of control normal tissue. All of the control cervical samples came from patients with negative pap smears. Reverse transcription-PCR and Southern-blot experiments revealed eag expression in 100% of the cancerous samples and in 33% of the normal biopsies. Immunochemistry experiments showed the presence of EAG channel protein in cells from the primary cultures and in cervical cancer biopsies sections from the same patients. In addition, we looked for EAG-mediated currents in the cultures from cervical cancer cells. Here we show for the first time EAG channel activity in human tumors. Patch-clamp recordings showed typical EAG-mediated currents modulated by magnesium and displaying a pronounced Cole-Moore shift. Because EAG expression and channel activity have been suggested to be important in cell proliferation, our findings strongly support the idea of considering EAG as a tumor marker as well as a potential membrane therapeutic target for cervical cancer MH - Germany MH - Mexico|Distrito Federal PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 21 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000224292400025 L2 - EAG K+ CHANNELS; CELL-CYCLE; MELANOMA-CELLS; TUMOR-CELLS; PROLIFERATION; MYOBLASTS; FUSION SO - Cancer Research 2004 ;64(19):6996-7001 10725 UI - 5163 AU - Farkas T AU - Zhong WM AU - Jing Y AU - Huang PW AU - Espinosa SM AU - Martinez N AU - Morrow AL AU - Ruiz-Palacios GM AU - Pickering LK AU - Jiang X AD - Childrens Hosp, Med Ctr, Div Infect Dis, Cincinnati, OH 45229, USAChildrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USAUniv Cincinnati, Coll Med, Dept Pediat, Cincinnati, OH, USAEastern Virginia Med Sch, Norfolk, VA 23501, USACent Hosp, Virol Lab, Mendoza, ArgentinaInst Med Serv & Nutr, Dept Infect Dis, Mexico City, DF, MexicoCtr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA 30333, USAFarkas, T, Childrens Hosp, Med Ctr, Div Infect Dis, 3333 Burnet Ave, Cincinnati, OH 45229 USA TI - Genetic diversity among sapoviruses AB - Norovirus and Sapovirus are two genera of the family Caliciviridae that contain viruses that can cause acute gastroenteritis in humans. Noroviruses (NOR) are genetically highly diverse but limited studies of the genetic diversity of sapoviruses (SAP) have been reported. In this study we characterized twenty-five SAP detected in our laboratory from outbreaks or sporadic cases of acute gastroenteritis in children from different geographical locations and in adults involved in a cruise ship outbreak investigation and a nursing home outbreak. Based on significant differences of partial RNA polymerase sequences (278-286 nt), the 25 strains were grouped into 12 genetic clusters, including 9 potential new clusters. Extended sequence analysis of the capsid gene of selected strains representing five potential new clusters supported this grouping. Four strains (Hou7-1181/90, Mex340/90, Cruise ship/00 and Argentina39) had <84% amino acid (aa) identity to each other and to the published sequences in the GenBank. Mex14917/00 was almost identical to Stockholm/97/SE whose RNA polymerase sequence was unknown. Phylogenetic and distance analyses of the capsid region of the four new strains showed that Hou7-1181/90 and Argentina39 represent two new genogroups and Mex340/90 and Cruise ship/00 belong to two new clusters within the London/92 genogroup. Thus, based on the capsid sequences we propose to classify the currently known SAP into nine genetic clusters within five genogroups, including one genogroup that is represented by an animal calicivirus, the porcine enteric calicivirus (PEC) MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - VIENNA: SPRINGER WIEN RP - NOT IN FILE U3 - TC 55 U4 - Virology U5 - J;Article AV - English IS - 0304-8608 UR - ISI:000222241100004 L2 - SAPPORO-LIKE VIRUSES; NORWALK-LIKE VIRUSES; HUMAN CALICIVIRUSES; MOLECULAR CHARACTERIZATION; ENTERIC CALICIVIRUSES; PHYLOGENETIC ANALYSIS; GASTROENTERITIS; CHILDREN; EPIDEMIOLOGY; DISTINCT SO - Archives of Virology 2004 ;149(7):1309-1323 10726 UI - 4250 AU - Favela J AU - Natsu H AU - Perez C AU - Robles O AU - Moran AL AU - Romero R AU - Martinez-Enriquez AM AU - Decouchant D AD - CICESE, Dept Ciencias Computac, Ensenada, Baja California, MexicoLab LSR, Grenoble, FranceCINVESTAV, IPN, Dept Ing Elect, Mexico City, DF, MexicoFavela, J, CICESE, Dept Ciencias Computac, Ensenada, Baja California, Mexico TI - Empirical evaluation of collaborative support for distributed pair programming AB - Pair programming is an Extreme Programming (XP) practice where two programmers work on a single computer to produce an artifact. Empirical evaluations have provided evidence that this technique results in higher quality code in half the time it would take an individual programmer. Distributed pair programming could facilitate opportunistic pair programming sessions with colleagues working in remote sites. In this paper we present the preliminary results of the empirical evaluation of the COPPER collaborative editor, developed explicitly to support pair programming. The evaluation was performed on three different conditions: pairs working collocated on a single computer; distributed pairs working in application sharing mode; and distributed pairs using collaboration aware facilities. In all three cases the subjects used the COPPER collaborative editor. The results support our hypothesis that distributed pairs could find the same amount of errors as their collocated counterparts. However, no evidence was found that the pairs that used collaborative awareness services had better code comprehension, as we had also hypothesized MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224023500018 SO - Groupware: Design, Implementation, and Use, Proceedings 2004 ;3198():215-222 10727 UI - 4451 AU - Favela J AU - Rodriguez M AU - Preciado A AU - Gonzalez VM AD - CICESE, Ctr Invest Cientifica & Educ Super, Ensenada 22860, Baja California, MexicoUniv Autonoma Baja California, Mexicali 21280, Baja California, MexicoUniv Calif Irvine, Irvine, CA 92717, USAFavela, J, CICESE, Ctr Invest Cientifica & Educ Super, Ensenada 22860, Baja California, Mexico TI - Integrating context-aware public displays into a mobile hospital information system AB - Hospitals are convenient settings for deployment of ubiquitous computing technology. Not only are they technology-rich environments, but their workers experience a high level of mobility resulting in information infrastructures with artifacts distributed throughout the premises. Hospital information systems (HISs) that provide access to electronic patient records are a step in the direction of providing accurate and timely information to hospital staff in support of adequate decision-making. This has motivated the introduction of mobile computing technology in hospitals based on designs which respond to their particular conditions and demands. Among those conditions is the fact that worker mobility does not exclude the need for having shared information artifacts at particular locations. In this paper, we extend a handheld-based mobile HIS with ubiquitous computing technology and describe how public displays are integrated with handheld and the services offered by these devices. Public displays become aware of the presence of physicians and nurses in their vicinity and adapt to provide users with personalized, relevant information. An agent-based architecture allows the integration of proactive components that offer information relevant to the case at hand, either from medical guidelines or previous similar cases MH - Mexico|Baja California MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Information Systems;Computer Science, Interdisciplinary Applications;Mathematical & Computational Biology;Medical Informatics U5 - J;Article AV - English IS - 1089-7771 UR - ISI:000223852000008 L2 - autonomous agents;context-aware computing;hospital information systems (HISs);public displays;ubiquitous computing;ACCEPTANCE; TECHNOLOGY SO - Ieee Transactions on Information Technology in Biomedicine 2004 ;8(3):279-286 10728 UI - 5701 AU - Favila ME AU - Fresneau D AU - Gonord P AU - Ruaud JP AD - Inst Ecol, Xalapa 91070, Veracruz, MexicoUniv Paris 13, CNRS, Lab Ethol Expt & Comparee, ESA 7025, F-93430 Villetaneuse, FranceUniv Paris 11, CNRS, URA, U2R2M,ESA 8081, F-91405 Orsay, FranceFavila, ME, Inst Ecol, AC Apartado Postal 63, Xalapa 91070, Veracruz, Mexico TI - Nuclear magnetic resonance microscopy of the internal structure of the carrion rolling scarab Canthon cyanellus cyanellus (Scarabaeidae : Scarabaeinae) AB - Nuclear magnetic resonance microscopy was used to observe the internal structure of male and female carrion rolling scarab Canthon cyanellus cyanellus adults. Images were produced with a NMR microscope built at the University of Orsay, France. The NMR microscope operated at 360 MHz and produced images of live insects with an in-plan resolution of 30 mum x 30 mum from a slice 125 mum thick. NMR images of horizontal slices through head, thorax, and abdomen of males and females of different ages and physiological stages were obtained. Internal organs such as reproductive organs, gut, fat body, and pygidial glands were clearly observed in both sexes; ova at different stages and aedeagus were identified in females and males, respectively. Pygidial glands in both sexes and ova and fat body in females seem to be good indicators of the reproductive condition of the beetles. These results show the potential of NMR microscopy as a non-invasive method to study the relationships between the internal morphology, behavior, and physiological status of live beetles MH - France MH - Mexico|Veracruz PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000220808700018 L2 - LECONTE COLEOPTERA; NMR MICROSCOPY; INSECTS; TOOL SO - Coleopterists Bulletin 2004 ;58(1):125-131 10729 UI - 5229 AU - Feledy JA AU - Goodman CM AU - Taylor T AU - Stal S AU - Smith B AU - Hollier L AD - Baylor Coll Med, Div Plast & Reconstruct Surg, Houston, TX 77030, USABaylor Coll Med, Div Oral & Maxillofacial Surg, Houston, TX 77030, USAUniv Autonoma Guadalajara, Sch Med, Jalisco, MexicoHollier, L, Texas Childrens Hosp, Baylor Coll Med, Div Plast Surg, 6621 Fannin St, Houston, TX 77030 USA TI - Vertical facial distraction in the treatment of arhinia MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Surgery U5 - J;Article AV - English IS - 0032-1052 UR - ISI:000221917700025 L2 - CONGENITAL ABSENCE; CLEFT-LIP; MAXILLARY DISTRACTION; MIDFACE DISTRACTION; NOSE; OSTEOGENESIS; PALATE; CONSTRUCTION SO - Plastic and Reconstructive Surgery 2004 ;113(7):2061-2066 10730 UI - 3638 AU - Felix-Medina MH AU - Thompson SK AD - Univ Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Culiacan, MexicoPenn State Univ, Dept Stat, University Pk, PA 16802, USAFelix-Medina, MH, Univ Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Ciudad Univ, Culiacan, Mexico TI - Adaptive cluster double sampling AB - We present a multi-phase variant of adaptive cluster sampling which allows the sampler to control the number of measurements of the variable of interest. A first-phase sample is selected using an adaptive cluster sampling design based on an inexpensive auxiliary variable associated with the survey variable. Then the network structure of the adaptive cluster sample is used to select an ordinary one-phase or two-phase subsample of units and the values of the survey variable associated with those units are recorded. The population mean is estimated by either a regression-type estimator or a Horvitz-Thompson-type estimator. The results of a simulation study show good performance of the proposed design, and suggest that in many real situations this design might be preferred to the ordinary adaptive cluster sampling design MH - Mexico|Sinaloa MH - USA PB - LONDON: BIOMETRIKA TRUST RP - NOT IN FILE U3 - TC 0 U4 - Biology;Mathematical & Computational Biology;Statistics & Probability U5 - J;Article AV - English IS - 0006-3444 UR - ISI:000225940000008 L2 - adaptive cluster sampling;double sampling;finite population;Horvitz-Thompson estimator;multi-phase sampling;regression estimator SO - Biometrika 2004 ;91(4):877-891 10731 UI - 3958 AU - Felix RA AU - Sanchez EN AU - Chen GR AD - CINVESTAV, Unidad Guadalajara, Guadalajara, Jalisco, MexicoCity Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R ChinaFelix, RA, CINVESTAV, Unidad Guadalajara, Guadalajara, Jalisco, Mexico TI - Reproducing chaos by variable structure recurrent neural networks AB - In this paper, we present a new approach for chaos reproduction using variable structure recurrent neural networks (VSRNN). A neural network identifier is designed, with a variable structure that will change according to its output performance as compared to the given orbits of an unknown chaotic systems. A tradeoff between identification errors and computational complexity is discussed MH - Mexico|Jalisco MH - Peoples R China PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence;Computer Science, Hardware & Architecture;Computer Science, Theory & Methods;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1045-9227 UR - ISI:000224929600009 L2 - chaos generation;identification;recurrent neural networks;variable structure system;SYSTEMS SO - Ieee Transactions on Neural Networks 2004 ;15(6):1450-1457 10732 UI - 5193 AU - Felten F AU - Schneider GA AU - Saldana JM AU - Kalinin SV AD - Tech Univ Hamburg, Adv Ceram Grp, D-21073 Hamburg, GermanyIPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76230, MexicoOak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831, USAFelten, F, Tech Univ Hamburg, Adv Ceram Grp, D-21073 Hamburg, Germany TI - Modeling and measurement of surface displacements in BaTiO3 bulk material in piezoresponse force microscopy AB - Piezoresponse force microscopy (PFM) is applied to image ferroelastic formed c domains in a single crystal ferroelectric barium titanate bulk material. A simple model and an analytical approach are presented, which provides a basis to understand the complex tip-surface interactions responsible for the image contrast in PFM. In particular, the measured amplitude of the piezoresponse out-of-plane surface displacements of a C- domain is compared with theoretical results based upon a three-dimensional Green's function solution. The electric field distribution in the tip-surface contact is determined using image-charge calculations for a spherical tip separated by a thin water layer from a mechanically isotropic and electrically anisotropic dielectric half plane. (C) 2004 American Institute of Physics MH - Germany MH - Mexico|Queretaro MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 29 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000222093300090 L2 - BARIUM-TITANATE; FILMS SO - Journal of Applied Physics 2004 ;96(1):563-568 10733 UI - 7359 AU - Femat R AU - Mendez-Acosta HO AU - Steyer JP AU - Gonzalez-Alvarez V AD - IPICyT, Dept Matemat Aplicadas & Sistemas Computac, San Luis Potosi 78231, SLP, MexicoCUCEI UDG, Dept Ingn Quim, Guadalajara 44860, Jalisco, MexicoINRA, Lab Biotechnol Environm, F-11100 Narbonne, FranceFemat, R, IPICyT, Dept Matemat Aplicadas & Sistemas Computac, Apdo Postal 3-90,Tangamanga, San Luis Potosi 78231, SLP, Mexico TI - Temperature oscillations in a biological reactor with recycle AB - The oscillatory behavior of temperature in a wastewater treatment is studied in this work. This process is composed of a fixed bed reactor, where the anaerobic digestion of distillery vinasses takes place, and a heat exchanger, which allows to hold the bioreactor temperature around 308.5 K. The heat exchanger is basically controlled by a proportional-integral-derivative feedback (PID control) while the bioreactor is controlled by a feedback law with uncertainties estimator. Both bioreactor and heat exchanger are interconnected by recycle streams. The bioreactor temperature in the wastewater system displays oscillatory behavior under interconnection. By using time series analysis of the bioreactor temperature (Poincare maps, maximum Lyapunov exponents and power spectrum density), we show that recycling induces aperiodic oscillatory behavior of the temperature within the bioreactor, which does not necessarily imply inexpedient operation. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Jalisco MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000185578200020 L2 - WASTE-WATER TREATMENT; LYAPUNOV EXPONENTS; CHEMICAL REACTOR; HOMOCLINIC CHAOS; FEEDBACK; SYSTEMS; MODEL; NOISE; TIME SO - Chaos Solitons & Fractals 2004 ;19(4):875-889 10734 UI - 3894 AU - Fenclova D AU - Perez-Casas S AU - Costas M AU - Dohnal V AD - Inst Chem Technol, Dept Chem Phys, CR-16628 Prague 6, Czech RepublicUniv Nacl Autonoma Mexico, Fac Quim, Dept Fisicoquim, Lab Termofis, Mexico City 04510, DF, MexicoDohnal, V, Inst Chem Technol, Dept Chem Phys, CR-16628 Prague 6, Czech Republic TI - Partial molar heat capacities and partial molar volumes of all of the isomeric (C3 to C5) alkanols at infinite dilution in water at 298.15 K AB - Apparent molar heat capacities and apparent molar volumes were measured for all isomeric C-3 to C-5 alkanols in their dilute aqueous solutions at 298.15 K using a differential flow microcalorimeter in conjuntion with a vibrating-tube densimeter. Molar volumes and molar heat capacities of the pure alkanols (except for 2-methyl-2-propanol and 2,2-dimethyl-1-propanol, which are solid at 298.15 K) were determined using the same instrumentation. The concentration dependence of the apparent properties allowed the determination, through extrapolation, of the infinite dilution partial molar volumes (V) over bar (infinity)(m,1) and heat capacities (C) over bar (infinity)(p,m,1) of these alkanols in water. These values, combined with the respective pure liquid properties, produced the limiting partial molar excess quantities ((V) over bar (E,infinity)(m,1), (C) over bar (E,infinity)(p,m,1)). The present measurements agree well with available literature values. The group contribution schemes of Cabani et al. (Cabani, S.; Gianni, P.; Mollica, V.; Lepori, L. Group Contribution to the Thermodynamic Properties of Non-Ionic Organic Solutes in Dilute Aqueous Solution. J. Solution Chem. 1981, 10, 563-595) and of Plyasunov and Shock (Plyasunov, A. V.; Shock, E. L. Thermodynamic Functions of Hydration of Hydrocarbons at 298.15 K and 0.1 MPa. Geochim. Cosmochim. Acta 2000, 64, 439-468) were used to predict the limiting partial molar properties. It was found that the predictions of both schemes are very good MH - Czech Republic MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9568 UR - ISI:000225096000067 L2 - AQUEOUS-SOLUTIONS; THERMODYNAMIC PROPERTIES; ORGANIC-COMPOUNDS; TERTIARY-AMINES; ALCOHOLS; TEMPERATURES; SOLUTES; DENSITIES; BUTANOLS; MIXTURES SO - Journal of Chemical and Engineering Data 2004 ;49(6):1833-1838 10735 UI - 3817 AU - Fenn R AU - Jordan-Santana M AU - Kauffman L AD - Univ Sussex, Dept Math, Brighton BN1 9RF, E Sussex, EnglandNatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Illinois, Dept Math Stat & Comp Sci, Chicago, IL 60607, USAFenn, R, Univ Sussex, Dept Math, Mantell Bldg, Brighton BN1 9RF, E Sussex, England TI - Biquandles and virtual links AB - In this paper we define a birack and a biquandle, generalizing the notion of a rack and a quandle. This gives rise to natural invariants of virtual knots and braids. Some of the properties of biracks and biquandles are explained in this paper. Applications to particular virtual braids and links are given. (C) 2004 Published by Elsevier B.V MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000225193600009 L2 - SET-THEORETICAL SOLUTIONS; YANG-BAXTER EQUATION SO - Topology and Its Applications 2004 ;145(1-3):157-175 10736 UI - 4645 AU - Feria L AU - Gonzalez C AU - Castro M AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, DEPg, Mexico City 04510, DF, MexicoNatl Inst Stand & Technol, Phys & Chem Properties Div, Gaithersburg, MD 20899, USACastro, M, Univ Nacl Autonoma Mexico, Fac Quim, Dept Fis & Quim Teor, DEPg, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Ab initio study of the CH3O2 self-reaction in gas phase: Elucidation of the CH3O2+CH3O2 -> 2CH(3)O+O-2 pathway AB - Ab initio electronic structure calculations have been performed to determine the mechanism governing the 2CH(3)O(2) --> 2CH(3)O + O-2 chemical reaction in gas phase. Geometry optimizations for reactants, intermediates, transition states, and products were performed at the MP2 level of theory with the 6-311G(2d,2p) basis sets. Further, PMP4(SDTQ)/6-311G(3df,2p) single-point calculations were performed on the previous MP2/6-311G(2d,2p)-optimized geometries. For the past 50 years, it has been proposed that the production of CH3O and O-2 in the self-reaction of methylperoxyl radicals is the result of the direct dissociation of a noncyclic tetraoxide intermediate via a concerted mechanism involving a single step. Our theoretical results indicate that the reaction path is more complex than expected. We found that the reaction proceeds through a nonconcerted mechanism involving two tetraoxide intermediates that have different geometries and relative energies. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000223356800006 L2 - self-reaction;methyl peroxyl radical;theoretical study;PEROXY-RADICALS; METHYL PEROXY; ABINITIO SO - International Journal of Quantum Chemistry 2004 ;99(5):605-615 10737 UI - 6507 AU - Feria L AU - Gonzalez C AU - Castro M AD - Univ Nacl Autonoma Mexico, Fac Quim, DEPg, Dept Fis & Quim Teor, Mexico City 04510, DF, MexicoNIST, Phys & Chem Properties Div, Gaithersburg, MD 20899, USAFeria, L, Univ Nacl Autonoma Mexico, Fac Quim, DEPg, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico TI - Theoretical study of the energetic and possible intermediates of the CH3CH2O2 self-reaction AB - By means of ab initio and density functional theory methods we have studied the geometry and electronic structure of the ethyl peroxyl radical, CH3CH2O2, and of the tetraoxide intermediates, CH3CH2O4CH2CH3, involved in the self-reaction of this radical. These kinds of reactions may occur in the troposphere and, depending on the structure of the intermediates, the following pathways are originated: (1) 2CH(3)CH(2)O(2) --> 2CH(3)CH(2)O + O-2, (II) 2CH(3)CH(2)O(2) ---> CH3CH2OH + CH3CHO + O-2, and (III) 2CH(3)CH(2)O(2) --> CH3CH2O2CH2CH3 + O-2. The energetic of these three reactions was also addressed. With the aid of the Gaussian 98 package, full geometry optimizations, electronic structure, vibrational frequencies, and total energies were determined for reactives, intermediates, and products of each pathway. Calculations, of the all-electron type, were done at the Hartree-Fock (HF), MP2, and B3LYP levels of theory using 6-31IG(2d,2p) orbital basis sets. It was found that the B3LYP results, for the enthalpy of the reactions, DeltaH(r), are in better agreement with the experiment than the HF and PMP2 estimates. Indeed, the DeltaH(r), for paths I and II, including zero-point energies, are +23 and -80.2 kcal/mol, respectively, which compares well with the experimental values: +5.5 and -82.0 kcal/mol. Our prediction for DeltaH(r), of path III is -29.7 kcal/mol. Moreover, three intermediates, A, B, and C, of different geometry and energy were found. The structure of each intermediate is closely connected with the products obtained in each reaction path, as determined experimentally. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000188003900012 L2 - self-reaction;ethyl peroxyl radical;theoretical study;HYDROPEROXYL RADICAL DIMER; SPECTRA; CH3O2 SO - International Journal of Quantum Chemistry 2004 ;96(4):380-393 10738 UI - 5515 AU - Fernald LC AU - Gutierrez JP AU - Neufeld LM AU - Olaiz G AU - Bertozzi SM AU - Mietus-Snyder M AU - Gertler PJ AD - Univ Calif Berkeley, Inst Business & Econ Res, Berkeley, CA 94720, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoUniv Calif San Francisco, Sch Nursing, San Francisco, CA 94143, USAUniv Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720, USAUniv Calif Berkeley, Haas Sch Business, Berkeley, CA 94720, USAFernald, LC, Univ Calif Berkeley, Inst Business & Econ Res, Berkeley, CA 94720 USA TI - High prevalence of obesity among the poor in Mexico MH - USA MH - Mexico|Morelos PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 9 U4 - Medicine, General & Internal U5 - J;Letter AV - English IS - 0098-7484 UR - ISI:000221738800015 SO - Jama-Journal of the American Medical Association 2004 ;291(21):2544-2545 10739 UI - 3942 AU - Fernandes RC AU - Gu Q AU - Melnick J AU - Terlevich E AU - Terlevich R AU - Kunth D AU - Lacerda RR AU - Joguet B AD - Univ Fed Santa Catarina, CFM, Dept Fis, BR-88040900 Florianopolis, SC, BrazilNanjing Univ, Dept Astron, Nanjing 210093, Peoples R ChinaEuropean So Observ, Santiago 19, ChileInst Nacl Astrofis Opt & Elect, Puebla, MexicoInst Astrophys, F-75014 Paris, FranceFernandes, RC, Univ Fed Santa Catarina, CFM, Dept Fis, POB 476, BR-88040900 Florianopolis, SC, Brazil TI - The star formation history of Seyfert 2 nuclei AB - We present a study of the stellar populations in the central similar to200 pc of a large and homogeneous sample comprising 79 nearby galaxies, most of which are Seyfert 2s. The star formation history of these nuclei is reconstructed by means of state-of-the-art population synthesis modelling of their spectra in the 3500-5200 Angstrom interval. A quasar-like featureless continuum (FC) is added to the models to account for possible scattered light from a hidden active galactic nucleus (AGN). We find the following. (1) The star formation history of Seyfert 2 nuclei is remarkably heterogeneous: young starbursts, intermediate-age and old stellar populations all appear in significant and widely varying proportions. (2) A significant fraction of the nuclei show a strong FC component, but this FC is not always an indication of a hidden AGN: it can also betray the presence of a young, dusty starburst. (3) We detect weak broad Hbeta emission in several Seyfert 2s after cleaning the observed spectrum by subtracting the synthesis model. These are most likely the weak scattered lines from the hidden broad-line region envisaged in the unified model, given that in most of these cases independent spectropolarimetry data find a hidden Seyfert 1. (4) The FC strengths obtained by the spectral decomposition are substantially larger for the Seyfert 2s which present evidence of broad lines, implying that the scattered non-stellar continuum is also detected. (5) There is no correlation between the star formation in the nucleus and either the central or overall morphology of the parent galaxies MH - Brazil MH - Chile MH - France MH - Mexico|Puebla MH - Peoples R China PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000225061700030 L2 - galaxies : active;galaxies : Seyfert;galaxies : statistics;galaxies : stellar content;ACTIVE GALACTIC NUCLEI; STELLAR POPULATION SYNTHESIS; BROAD-LINE REGIONS; RADIO GALAXIES; VELOCITY DISPERSIONS; STARBURST; SPECTRA; SPECTROPOLARIMETRY; EVOLUTION; EMISSION SO - Monthly Notices of the Royal Astronomical Society 2004 ;355(1):273-296 10740 UI - 5518 AU - Fernandez-Anaya G AU - Martinez-Garcia JC AU - Kucera V AU - guilar-George D AD - IPN, PIMAyC, Mexico City 07730, DF, MexicoIPN, CINVESTAV, Dept Automat Control, Mexico City 07730, DF, MexicoCzech Tech Univ, Fac Elect Engn, Prague 16627, Czech RepublicFernandez-Anaya, G, IPN, PIMAyC, Mexico City 07730, DF, Mexico TI - MIMO systems properties preservation under SPR substitutions AB - The preservation of some control-oriented positive real properties (passivity, positivity, bounded realness, as well as input-output behavior) in multi-input multi-output transfer functions is studied, when performing substitutions (of the complex Laplace variable s) by a particular class of rational strictly positive real (SPR) functions, the so-called SPR functions of zero relative degree (SPRO functions). We also consider here the preservation of stability properties of a class of unforced linear time-invariant systems with memoryless (possibly time-varying nonlinear) input depending on the system output MH - Czech Republic MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1057-7130 UR - ISI:000221441100003 L2 - continuous linear time-invariant multi-input multi-output (MIMO) systems;control-oriented properties;properties preservation;stability;strictly positive real (SPR) functions;substitutions;unforced systems;ROBUST STABILITY; NONLINEARITIES; MONOTONE; FEEDBACK SO - Ieee Transactions on Circuits and Systems Ii-Express Briefs 2004 ;51(5):222-227 10741 UI - 4403 AU - Fernandez-Cara E AU - De Teresa L AD - Univ Sevilla, Dpto EDAN, E-41080 Seville, SpainUNAM, Inst Matemat, Mexico City 04510, DF, MexicoFernandez-Cara, E, Univ Sevilla, Dpto EDAN, Aptdo 1180, E-41080 Seville, Spain TI - Null controllability of a cascade system of parabolic-hyperbolic equations AB - This paper is concerned with the null controllability of a cascade linear system formed by a heat and a wave equation in a cylinder Omega x (0, T). The control acts only on the heat equation and is supported by a set of the form omega x (0, T), where w subset of Omega. In the wave equation, only the restriction of the solution to the heat equation to another set O x (0, T) appears. In the main result in this paper, we show that, under appropriate assumptions on T, omega and O, the system is null controllable MH - Mexico|Distrito Federal MH - Spain PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1078-0947 UR - ISI:000223883000023 L2 - Null controllability;cascade system;parabolic-hyperbolic;SEMILINEAR HEAT-EQUATION; PARTIAL-DIFFERENTIAL EQUATIONS; BOUNDARY CONTROLLABILITY; INSENSITIZING CONTROLS; WAVE-EQUATIONS SO - Discrete and Continuous Dynamical Systems 2004 ;11(2-3):699-714 10742 UI - 5375 AU - Fernandez-Cata G AU - Alvarez LJ AU - Dovesi R AU - Zicovich-Wilson CM AD - Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoInst Super Tecnol & Ciencias Aplicadas, Havana, CubaUniv Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUniv Turin, Dipartimento IFM, I-10125 Turin, ItalyUnita INFM Torino, I-10125 Turin, ItalyZicovich-Wilson, CM, Univ Autonoma Estado Morelos, Fac Ciencias, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Periodic ab initio study of the electronic structure of alpha-Al2O3 and AIN(w) surfaces based on localized Wannier functions AB - The behavior of surface undercoordinated Al3+ cations as electron acceptors is investigated by means of periodic ab initio calculations. The (0001) surfaces of alpha-Al2O3 and AlN(w) were chosen as representative of the different Al coordination types. The electronic structure was analyzed through the valence localized Wannier functions that allow a straightforward description of the electron pairs in terms of chemical concepts. The relevance of the electron back-donation toward surface Al3+ cations in the reconstruction of the surfaces is discussed, and evidence was found that some pi-bond character is displayed by the surface Al-X bonds after relaxation. This explains the tendency to form surface Al-X planar layers in this kind of system MH - Cuba MH - Italy MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000221700300056 L2 - ALUMINUM NITRIDE; ABINITIO CHARACTERIZATION; LINEAR COMBINATION; FIRST-PRINCIPLES; THIN-FILMS; ALN; SEMICONDUCTORS; RELAXATION; CORUNDUM; SYSTEMS SO - Journal of Physical Chemistry B 2004 ;108(22):7316-7322 10743 UI - 2572 AU - Fernandez-Concha GC AU - Ramirez IM AD - Ctr Invest Cient Yucatan, Herbarium CICY, Merida 97200, Yucatan, MexicoFernandez-Concha, GC, Harvard Univ Hebaria, Orchid Herbarium Oakes Ames, 22 Divin Ave, Cambridge, MA 02138 USA TI - Two new species of Encyclia (Orehidaceae : Laellinae) from Venezuela AB - Two new species of Encyclia Hooker (Orchidaceae: Laeliinae) are proposed from Venezuela, E. betancourtiana Carnevali T I. Ramfrez and E. garciae-esquivelii Carnevali T I. Ramirez. The first, from Andean Venezuela, is related to E. aspera, but has a subquadrate labellum and grows at higher elevations. The second, from the northern slopes of the Coastal Range, is related to E. diurna but has smaller, differently colored flowers, a more elliptic central lobe, and grows in coastal thorn forests MH - USA MH - Mexico|Yucatan PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000228383200004 L2 - Encyclia;Laeliinae;Orchidaceae;systematics;Venezuela SO - Novon 2004 ;14(4):413-419 10744 UI - 5917 AU - Fernandez-Pavia SP AU - Grunwald NJ AU - az-Valasis M AU - Cadena-Hinojosa M AU - Fry WE AD - USDA ARS, Prosser, WA 99350, USAUniv Michoacana, Inst Invest Agropecuarias & Forestales, Morelia 58240, Michoacan, MexicoCIR CTR INIFAP, Chapingo 56230, MexicoCornell Univ, Dept Plant Pathol, Ithaca, NY 14853, USAGrunwald, NJ, USDA ARS, Prosser, WA 99350, USA TI - Soilborne oospores of Phytophthora infestans in central Mexico survive winter fallow and infect potato plants in the field AB - Survival and infectivity of oospores in soils naturally infested with R infestans oospores were studied in central Mexico. Sporangia were selectively eliminated from soil samples to determine infectivity attributable to the presence of oospores. Selective elimination of sporangia was achieved by two cycles of wetting and drying the soil. Oospore concentration, viability, and infectivity varied among soils collected during the winter fallow in different locations of central Mexico. In some soils, oospores were infective regardless of the time at which they were collected during the winter fallow. However, oospore viability and infectivity decreased following 2 years of intercropping. The number of stem lesions and initial disease, severity were significantly higher in soils with moderate (20 to 39 oospores g(-1) soil) oospore infestation compared with soils with low (0 to 19 oospores g-1 soil) infestation. Our study confirms that oospores can survive winter fallow and serve as a source of primary inoculum in the central highlands of Mexico. Oospore survival appeared lower in the Toluca Valley soil, which may be an indication of soil suppressiveness MH - Mexico|Estado De Mexico MH - Mexico|Michoacan MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences U5 - J;Article AV - English IS - 0191-2917 UR - ISI:000220313300005 L2 - bioassay;oomycete;potato late blight;TOLUCA VALLEY; LATE-BLIGHT; GERMINATION; VIABILITY; SOIL SO - Plant Disease 2004 ;88(1):29-33 10745 UI - 6582 AU - Fernandez-Sanchez JM AU - Sawvel EJ AU - Alvarez PJJ AD - Univ Iowa, Dept Civil & Environm Engn, Seamans Ctr 4119, Iowa City, IA 52242, USALATAM Colgate Palmolive SA CV, Reg Technol Ctr, Mexico City 11500, DF, MexicoFernandez-Sanchez, JM, Univ Iowa, Dept Civil & Environm Engn, Seamans Ctr 4119, Iowa City, IA 52242 USA TI - Effect of Fe-0 quantity on the efficiency of integrated microbial-Fe-0 treatment processes AB - Batch experiments were conducted with different reaction systems to investigate how the treatment efficiency of integrated microbial-Fe-0 processes is affected by the amount of Fe-0 added. Abiotic experiments with hexavalent chromium and carbon tetrachloride mixtures corroborated that different pollutants could compete for reactive sites on the iron surface, which would hinder specific degradation rates when the available Fe-0 surface area is relatively small (e.g., I I m(2) l(-1)). In such cases, reductive precipitation of chromium could occlude reactive sites and significantly inhibit removal efficiency. Microbial participation in the cleanup process was also influenced by the amount of Fe-0 added. Increasing the Fe-0 dose (and thus the available surface area) had a stimulatory effect possibly due to a higher production of cathodic H-2, which can be used as electron donor for reductive biotransformation of many pollutants. However, high Fe-0 doses had an inhibitory effect due to a corrosion-induced increase in pH beyond the optimum range of the bacteria. This suggest that there may be a system-specific, optimum quantity of Fe-0 that satisfies availability requirements to preclude contaminant competition for reactive sites and biological requirements for H-2 production while minimizing inhibitory increases in pH. Results also confirmed extensive RDX mineralization in bioaugmented (but not in abiotic) Fe-0 systems, and support the notion that permeable reactive iron barriers performance might be enhanced by the participation of some microorganisms. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0045-6535 UR - ISI:000187802800005 L2 - reactive barriers;iron;anaerobic bioremediation;RDX;chromium;carbon tetrachloride;sulfate;ZERO-VALENT IRON; REACTIVE BARRIER; ZEROVALENT IRON; PERFORMANCE EVALUATION; RDX DEGRADATION; GRANULAR IRON; REMEDIATION; REDUCTION; GROUNDWATER; CHROMATE SO - Chemosphere 2004 ;54(7):823-829 10746 UI - 3717 AU - Fernandez AM AU - Dheree N AU - Turner JA AU - Martinez AM AU - Arriaga LG AU - Cano U AD - UNAM, Ctr Invest & Energia, Dept Mat Solares, Temixco, Morelos, MexicoFlorida Solar Energy Ctr, Cocoa, FL 32922, USANatl Renewable Energy Lab, Golden, CO 80401, USAInst Invest Elect Gerencia Energias No Convencion, Cuernavaca 62490, Morelos, MexicoFernandez, AM, UNAM, Ctr Invest & Energia, Dept Mat Solares, Av Xochicalco S-N, Temixco, Morelos, Mexico TI - Photoelectrochemical characterization of the Cu(In,Ga)S-2 thin film prepared by evaporation AB - Cu(In.Ga)S-2 chalcopyrite thin films have been characterized in order to determine the band edges potential position for photoelectrolysis water splitting. These values are correlated with the atomic composition of the samples. The characterization includes structural and atomic composition of the films. Sputtering/Sulphurization technique was used to prepare the films using different types of Cu-Ga and In targets. According to the capacitance measurements all of the films tested were p-type and the photoresponse technique shows that the band-gap values are between 1.38 and 1.74eV. We distinguish three type of samples, low, medium and high content of Ga in the films, and the band edges potential position values depend on the amount of Ga in the films and also these values shift more positive when the pH of solution increases. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000225424800008 L2 - chalcopyrite;CuIn1-xGaxS;physical evaporation;thin films SO - Solar Energy Materials and Solar Cells 2004 ;85(2):251-259 10747 UI - 5654 AU - Fernandez DJ AU - Negro J AU - Nieto LM AD - Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoNieto, LM, Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, Spain TI - Elementary systems with partial finite ladder spectra AB - It is shown that a subset of the kth-order supersymmetric partners of the harmonic oscillator admits third-order ladder operators, and provides a realization of second-order polynomial Heisenberg algebras. The corresponding spectra are composed of an infinite ladder of equally spaced energy levels and a finite one with k levels. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000220838300007 L2 - higher-order supersymmetry;finite ladder spectra;ISOSPECTRAL OSCILLATOR HAMILTONIANS; COHERENT STATES; FACTORIZATION METHOD; SOLVABLE POTENTIALS; EQUATION; ALGEBRAS; SUPERSYMMETRY SO - Physics Letters A 2004 ;324(2-3):139-144 10748 UI - 3990 AU - Fernandez EM AU - Soler JM AU - Garzon IL AU - Balbas LC AD - Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainUniv Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor, E-47011 Valladolid, SpainFernandez, EM, Univ Valladolid, Dept Fis Teor, E-47011 Valladolid, Spain TI - Trends in the structure and bonding of noble metal clusters AB - We present a systematic study of the electronic properties and the geometric structure of noble metal clusters X-n(nu) (X=Cu, Ag, Au; nu=-1,0,+1; nless than or equal to13 and n=20), obtained from first-principles generalized gradient approximation density functional calculations based on norm-conserving pseudopotentials and numerical atomic basis sets. We obtain planar structures for the ground state of anionic (nu=-1), neutral (nu=0), and cationic (nu=1) species of gold clusters with up to 12, 11, and 7 atoms, respectively. In contrast, the maximum size of planar clusters with nu=-1,0,+1 are n=(5,6,5) for silver and (5,6,4) for copper. For X-20 we find a T-d symmetry for gold and a compact C-s structure for silver and copper. Our results for the cluster geometries agree partially with previous first-principles calculations, and they are in good agreement with recent experimental results for anionic and cationic gold clusters. The tendency to planarity of gold clusters, which is much larger than in copper and silver, is strongly favored by relativistic effects, which decrease the s-d promotion energy and lead to hybridization of the half-filled 6s orbital with the fully occupied 5d(z)(2) orbital. That picture is substantiated by analyzing our calculated density matrix for planar and three-dimensional clusters of gold and copper. The trends for the cohesive energy, ionization potentials, electron affinities, and highest accupied and lowest unoccupied molecular orbital gap, as the cluster size increases, are studied in detail for each noble metal and rationalized in terms of two- and three-dimensional electronic shell models. The most probable fragmentation channels for X-n(nu) clusters are in very good agreement with available experiments MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 71 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000224856000077 L2 - DENSITY-FUNCTIONAL CALCULATIONS; INITIO MOLECULAR-DYNAMICS; ION MOBILITY MEASUREMENTS; SMALL GOLD CLUSTERS; POTENTIAL-CONFIGURATION INTERACTION; COLLISION-INDUCED DISSOCIATION; SMALL COPPER CLUSTERS; AB-INITIO; ELECTRONIC-PROPERTIES; SILVER CLUSTERS SO - Physical Review B 2004 ;70(16): 10749 UI - 5459 AU - Fernandez ML AU - Ballesteros MN AU - Cabrera RM AU - Saucedo MS AD - Univ Connecticut, Storrs, CT 06269, USACIAD, Hermosillo, Sonora, Mexico TI - Egg consumption does not alter the LDL/HDL ratio and improves LDL atherogenicity in children from Northern Mexico MH - Mexico|Sonora MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470700490 SO - Faseb Journal 2004 ;18(5):A861-A861 10750 UI - 6575 AU - Ferrannini E AU - Nannipieri M AU - Williams K AU - Gonzales C AU - Haffner SM AU - Stern MP AD - Univ Pisa, Sch Med, Dept Internal Med, Metab Unit, I-56126 Pisa, ItalyUniv Pisa, Sch Med, CNR, Inst Clin Physiol, I-56126 Pisa, ItalyUniv Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78285, USAAmer British Cowdray Hosp, Ctr Estudios Diabet, Mexico City, DF, MexicoSpecialty Hosp, Natl Med Ctr, Mexican Social Secur Inst, Div Internal Med,Endocrinol & Metab Serv, Mexico City, DF, MexicoFerrannini, E, Univ Pisa, Sch Med, Dept Internal Med, Metab Unit, Via Roma 67, I-56126 Pisa, Italy TI - Mode of onset of type 2 diabetes from normal or impaired glucose tolerance AB - Fasting plasma glucose concentrations (FPG) predict development of type 2 diabetes. Whether hyperglycemia evolves from normoglycemia gradually over time or as a step increase is not known. We measured plasma glucose and insulin levels during oral glucose testing in 35-to 64-year-old men and nonpregnant women from a population-based survey (Mexico City Diabetes Study) at baseline (n = 2,279) and after 3.25 (n = 1,740) and 7 years (n = 1,711) of follow-up. In subjects with normal glucose tolerance (NGT) on all three occasions (non-converters; n = 911), FPG increased only slightly (0.23 +/- 0.79 mmol/l, mean +/- SD; P < 0.0001) over 7 years. In contrast, conversion to diabetes among NGT subjects (n = 98) was marked by a large step-up in FPG regardless of time of conversion (3.06 +/- 2.57 and 2.94 +/- 3.11 mmol/l, respectively, at 3.25 and 7 years; P < 0.0001 vs. nonconverters). Likewise, in subjects who converted to diabetes from impaired glucose tolerance (n = 75), FPG rose by 3.14 +/- 3.83 and 3.12 +/- 3.61 mmol/l (P < 0.0001 vs. nonconverters). Three-quarters of converters had increments in FPG above the 90th percentile of the corresponding increments in nonconverters. Converters had higher baseline BMI (30.4 +/- 4.9 vs. 27.3 +/- 4.0 kg/m(2); p < 0.001) and fasting plasma insulin values (120 +/- 78 vs. 84 +/- 84 pmol/l; P < 0.02) than nonconverters; however, no consistent change in either parameter had occurred before conversion. In contrast, changes in 2-h postglucose insulin levels between time of conversion and preceding measurement were significantly (P < 0.0001) related to the corresponding changes in FPG in an inverse manner. We conclude that, within a 3-year time frame, the onset of diabetes is very often rapid rather than gradual and is in part explained by a fall in glucose-stimulated insulin response MH - Italy MH - Mexico|Distrito Federal MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 19 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0012-1797 UR - ISI:000187632400021 L2 - MEXICO-CITY; INSULIN-RESISTANCE; SAN-ANTONIO; POPULATION; OBESITY SO - Diabetes 2004 ;53(1):160-165 10751 UI - 5474 AU - Ferrari B AU - Rodriguez JL AU - Rojas E AU - Moreno R AD - Univ Autonoma Madrid, Inst Ceram & Vidrio, E-28049 Madrid, SpainCINVESTAV, Saltillo 250000, Coahuila, MexicoCIEMAT, Dpto Energias Renovables, E-28040 Madrid, SpainFerrari, B, Univ Autonoma Madrid, Inst Ceram & Vidrio, Campus Cantoblanco, E-28049 Madrid, Spain TI - Colloidal forming of coatings in the inner walls of a steel pipe AB - The development of new coating processes has important limitations related to the films thickness and the geometry of the coating substrates. In this work, two colloidal forming processes are proposed for manufacturing ceramic and metallic coatings on the inner surface of a steel pipe. Ceramic coatings of CaCO3 have been formed by electrophoretic deposition (EPD). Aqueous stable suspensions were prepared and a electrophoretic cell was designed, in which the steel tube to be coated acted simultaneously as container and working electrode. Nickel films were prepared by filling the pipe with the suspension and rotating to fully wet the steel surface. Nickel suspensions were formulated focusing an improved wettability and adherence to the steel surface by using binders. From these processes, ceramic and metallic coatings with 300-350 mum in thickness, homogeneous and strongly adhered to the inner surface of the steel pipe have been obtained MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000221517900100 L2 - colloidal processing;electrophoretic deposition;coatings;calcium carbonate;nickel SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(2):501-505 10752 UI - 4612 AU - Ferrario M AU - Hernandez-Becerril DU AU - Garibotti I AD - Natl Autonomous Univ Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoFac Ciencias Nat & Museo Plata, Dept Cient Ficol, RA-1900 La Plata, ArgentinaCRICYT, IANIGLA, RA-5500 Mendoza, ArgentinaHernandez-Becerril, DU, Natl Autonomous Univ Mexico, Inst Ciencias Mar & Limnol, Apdo Postal 70-305, Mexico City 04510, DF, Mexico TI - Morphological study of the marine planktonic diatom Chaetoceros castracanei Karsten (Bacillariophyceae) from Antarctic waters, with a discussion on its possible taxonomic relationships AB - Phytoplankton samples were collected along the north coast of the Antarctic peninsula, the Weddell Sea and the Gerlache Strait, in different seasons in 1985, 1986, 1999, and 2000-2002. Chaetoceros castracanei Karsten, a fairly rare species was present in the samples; its morphology, taxonomy and distribution have not been recently investigated. This species occurred mainly from January to April, and was recorded with relatively high abundances in the Weddell Sea (up to 9.5x10(4) cells l(-1)). C. castracanei forms straight or slightly curved, short to long chains, with the terminal and intercalary setae pointing in the same direction. The apertures are very reduced, centrally constricted, and there are numerous chloroplasts in the cells including the setae. Electron microscopy studies showed that valves are randomly perforated by round poroids, costae on the valve are absent, and an excentric rimoportula is present in every valve of the chain; the setae are circular in cross section at the base, but become foursided distally. Setae have perpendicular rows of elongate poroids, spines are arranged in spirals along the setae and the tips are very pointed. The intercalary setae are fused together in sibling valves. Chaetoceros impressus Jensen et Moestrup, recently described from Danish waters, appears to be conspecific with C. castracanei, and consequently we propose it as a synonym of the latter. The known distribution of Chaetoceros castracanei may be broadened to include Antarctic, subantarctic and Danish waters, and also possibly more temperate regions MH - Argentina MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000223556000011 L2 - Antarctica;Chaetoceros castracanei;diatoms;distribution;morphology SO - Botanica Marina 2004 ;47(4):349-355 10753 UI - 3760 AU - Ferraz JC AU - Stavropoulos E AU - Yang M AU - Coade S AU - Espitia C AU - Lowrie DB AU - Colston MJ AU - Tascon RE AD - Natl Inst Med Res, London NW7 1AA, EnglandUNAM, Inst Invest Biomed, Dept Immunol, Mexico City, DF, MexicoTascon, RE, Natl Inst Med Res, Mill Hill, London NW7 1AA, England TI - A heterologous DNA priming-Mycobacterium bovis BCG boosting immunization strategy using mycobacterial Hsp70, Hsp65, and a antigens improves protection against tuberculosis in mice AB - Tuberculosis is responsible for >2 million deaths a year, and the number of new cases is rising worldwide. DNA vaccination combined with Mycobacterium bovis bacillus Calmette Guerin (BCG) represents a potential strategy for prevention of this disease. Here, we used a heterologous prime-boost immunization approach using a combination of DNA plasmids and BCG in order to improve the efficacy of vaccination against Mycobacterium tuberculosis infection in mice. As model antigens, we selected the M. tuberculosis Apa (for alanine-proline-rich antigen) and the immunodominant Hsp65 and Hsp70 mycobacterial antigens combined with BCG. We demonstrated that animals injected with a combination of DNA vectors expressing these antigens, when boosted with BCG, showed increased specific antimycobacterial immune responses compared to animals vaccinated with BCG alone. More importantly, the protection achieved with this regimen was also significantly better than with BCG alone MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 25 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000225453900022 L2 - BACILLE CALMETTE-GUERIN; ADJUVANT ARTHRITIS; VACCINE; EFFICACY; IMMUNITY; PROTEIN; RESPONSES; CAPACITY; STRAINS; COMPLEX SO - Infection and Immunity 2004 ;72(12):6945-6950 10754 UI - 5222 AU - Ferri S AU - Strauss D AD - Univ Hull, Dept Math, Kingston Upon Hull HU6 7RX, N Humberside, EnglandUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoFerri, S, Univ Los Andes, Dept Matemat, Carrera 1A 18 A10,Apartado Aereo 4976, Bogota, Colombia TI - A note on the WAP-compactification and the LUC-compactification of a topological group AB - Let G be a topological group. Denote by G(LUC) and G(WAP) the LUC-compactification and the WAP-compactification of G, respectively. G(WAP) can be regarded as a quotient of G(LUC) and the quotient map denoted by pi. In this note we shall show that, when G is a SIN-group, there exists a dense open subset of G(LUC)\ G, consisting of points of unicity for pi, of cardinality at least 2(2kappa (G)), where kappa (G) denotes the compact covering number of G. We give an example to show that this statement does not hold for IN-groups, although G(LUC)\ G does contain at least 2(2kappa (G)) points if G is an IN-group. We also give characterisations of the completion (G) over tilde of G as a subspace of the uniform compactification uG. A consequence of the first result is an analogue of Veech's theorem for the WAP-compactification of a SIN-group MH - Colombia MH - United Kingdom MH - Mexico|Michoacan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0037-1912 UR - ISI:000221905400008 SO - Semigroup Forum 2004 ;69(1):87-101 10755 UI - 6124 AU - Ferro JM AU - Canhao P AU - Stam J AU - Bousser MG AU - Barinagarrementeria F AD - Hosp Santa Maria, Dept Neurol, P-1649035 Lisbon, PortugalUniv Amsterdam, Acad Med Ctr, Dept Neurol, NL-1105 AZ Amsterdam, NetherlandsHop Lariboisiere, Dept Neurol, F-75475 Paris, FranceInst Nacl Neurol & Neurocirurgia, Dept Neurol, Mexico City, DF, MexicoFerro, JM, Hosp Santa Maria, Dept Neurol, P-1649035 Lisbon, Portugal TI - Prognosis of cerebral vein and dural sinus thrombosis - Results of the International Study on Cerebral Vein and Dural Sinus Thrombosis (ISCVT) AB - Background and Purpose - The natural history and long-term prognosis of cerebral vein and dural sinus thrombosis (CVT) have not been examined previously by adequately powered prospective studies. Methods - We performed a multinational ( 21 countries), multicenter ( 89 centers), prospective observational study. Patients were followed up at 6 months and yearly thereafter. Primary outcome was death or dependence as assessed by modified Rankin Scale ( mRS) score > 2 at the end of follow-up. Results - From May 1998 to May 2001, 624 adult patients with CVT were registered. At the end of follow-up ( median 16 months), 356 patients (57.1%) had no symptom or signs ( mRS = 0), 137 (22%) had minor residual symptoms ( mRS = 1), and 47 (7.5%) had mild impairments ( mRS = 2). Eighteen (2.9%) were moderately impaired ( mRS = 3), 14 (2.2%) were severely handicapped ( mRS = 4 or 5), and 52 (8.3%) had died. Multivariate predictors of death or dependence were age > 37 years ( hazard ratio [HR] = 2.0), male sex ( HR = 1.6), coma ( HR = 2.7), mental status disorder ( HR = 2.0), hemorrhage on admission CT scan ( HR = 1.9), thrombosis of the deep cerebral venous system ( HR = 2.9), central nervous system infection ( HR = 3.3), and cancer ( HR = 2.9). Fourteen patients ( 2.2%) had a recurrent sinus thrombosis, 27 (4.3%) had other thrombotic events, and 66 (10.6%) had seizures. Conclusions - The prognosis of CVT is better than reported previously. A subgroup (13%) of clinically identifiable CVT patients is at increased risk of bad outcome. These high-risk patients may benefit from more aggressive therapeutic interventions, to be studied in randomized clinical trials MH - France MH - Mexico|Distrito Federal MH - Netherlands MH - Portugal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 88 U4 - Clinical Neurology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0039-2499 UR - ISI:000189243400011 L2 - cerebral veins;cranial sinuses;outcome;prognosis;thrombosis;LONG-TERM PROGNOSIS; VENOUS THROMBOSIS; STROKE; HEPARIN; RISK SO - Stroke 2004 ;35(3):664-670 10756 UI - 5132 AU - Fessant A AU - Gieraltowski J AU - Tannous C AU - Valenzuela R AD - CNRS, UBO, LMB, UMR 6135, F-29285 Brest, FranceNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoFessant, A, CNRS, UBO, LMB, UMR 6135, BP 809, F-29285 Brest, France TI - A novel broadband measurement method for the magnetoimpedance of ribbons and thin films AB - A novel broad-band measurement method of the magneto-impedance in thin films and ribbons is presented. It is based on the automated measurement of the reflection coefficient of a cell loaded with the sample. Illustrative results obtained with a permalloy multilayer thin film are presented and discussed. (C) 2003 Published by Elsevier B.V MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236800099 L2 - magnetic materials;transport;magneto-impedance;sensors;ribbons;thin films;MAGNETO-IMPEDANCE SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():1871-1872 10757 UI - 4329 AU - Figueredo AJ AU - Tal IR AU - McNeil P AU - Guillen A AD - Univ Arizona, Dept Psychol, Tucson, AZ 85721, USAInst Tecnol Hermosillo, Hermosillo, Sonora, MexicoFigueredo, AJ, Univ Arizona, Dept Psychol, Tucson, AZ 85721, USA TI - Farmers, herders and fishers - The ecology of revenge AB - Culture of honor (COH) theory [Nisbett, R. E., & Cohen, D. (1996). Culture of honor: The psychology of violence in the south. Boulder, CO: Westview Press] predicts that the importance of upholding one's reputation is cross-culturally variable: Revenge should be more prevalent in herding societies than in farming societies, and should be entirely absent in foraging societies. This study was designed to replicate the effects that they found among herding and farming societies and to either support or refute the claim regarding foraging societies. Using a 32-item questionnaire measuring the constructs of Reciprocity and Revenge, this study cross-culturally validates Nisbett and Cohen's COH theory and extends it to fishers, a special kind of forager Researchers sampled two herding communities (Hermosillo, Sonora, Mexico, and Liberia, Guanacaste, Costa Rica), two farming communities (Mexico City, Mexico, and San Jose, Costa Rica), and two fishing communities (La Paz, Baja California Sur, Mexico, and Puntarenas, Costa Rica.) The differences between the herding and farming samples replicated previous findings in that herders were higher on the Revenge scale than farmers. The fisher samples approximate the herder samples on the Revenge scale more than the farmer samples, but were significantly different from each other. Discrepancies between the fisher samples called for the investigation of alternative theories. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Sonora MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Biological;Behavioral Sciences;Social Sciences, Biomedical U5 - J;Article AV - English IS - 1090-5138 UR - ISI:000224118400005 L2 - culture of honor;cultural evolution theory;behavioral ecology farmers;herders;fishers;reciprocity;revenge;COOPERATION; EVOLUTION; COMMONS SO - Evolution and Human Behavior 2004 ;25(5):336-353 10758 UI - 3227 AU - Figueroa JV AU - Precigout E AU - Carcy B AU - Gorenflot A AD - CENID, PAVET, INIFAP, Jiutepec 62500, Morelos, MexicoFac Pharm Montpellier, Biol Cellulaire & Mol Lab, Montpellier, FranceFigueroa, JV, CENID, PAVET, INIFAP, Apartado Postal 206,CIVAC, Jiutepec 62500, Morelos, Mexico TI - Identification of a coronin-like protein in Babesia species AB - The present study was designed to immunochemically identify a coronin-like protein in Babesia bovis, B. bigemina, B. divergens, and B. canis. A 2-kbp cDNA insert of B. bovis carried by plasmid BvN9 was sequenced by the dideoxichain-termination method on both strands. The cDNA insert contained a 1719-bp long open reading frame coding for a deduced protein sequence of 61.7 kDa. Sequence analysis using the PSI-BLAST program revealed about 30 % protein sequence identity with a coronin-like protein of Plasmodium falciparum. The encoding sequence of the cDNA insert lacking 70 amino acids at the N-terminal was subcloned in frame into pGEX 4T-3 to produce a recombinant glutathione S-transferase (GST)-pBv fusion protein. Polyclonal antibodies prepared in rabbits immunized with the purified GST-fusion protein recognized a Babesia-specific component of approximately 60 kDa by immunoprecipitation with [S-35]methionine-labeled parasites. However, two molecules with relative sizes of 60 and 70 kDa were recognized in Babesia-infected erythrocyte extracts by immunobloting analysis. The 70-kDa component was apparently of host erythrocyte origin. In an indirect fluorescent antibody test, the rabbit serum strongly reacted with the merozoite stage of the four Babesia species, but also, although weakly, with the host erythrocyte. A cosedimentation assay performed with GST-pBv fusion protein and exogenous actin from rabbit liver showed that the GST-pBv fusion protein, but not the GST protein, was associated to actin. From these results, we conclude that the protein present in the four Babesia species analyzed here may be considered as a novel coronin-like, actin-binding protein MH - France MH - Mexico|Morelos PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Multidisciplinary Sciences U5 - S;Article AV - English IS - 0077-8923 UR - ISI:000226725500017 L2 - Babesia bovis;B. bigemina;B. divergens;B. canis;WD repeat;coronin-like protein;actin-binding protein;ACTIN-BINDING-PROTEIN; INVITRO CULTIVATION; WD-REPEAT; BOVIS; PIROPLASMS; ANTIBODIES; PARASITES; BIGEMINA; LIGHT; CANIS SO - Impact of Ecological Changes on Tropical Animal Health and Disease Control 2004 ;1026():125-138 10759 UI - 4560 AU - Fike KE AU - Kojima FN AU - Lindsey BR AU - Bergfeld EGM AU - Quintal-Franco JA AU - Melvin EJ AU - Zanella EL AU - Wehrman ME AU - Kinder JE AD - Univ Nebraska, Dept Anim Sci, Lincoln, NE 68583, USAOhio State Univ, Columbus, OH 43210, USAUniv Missouri, Dept Anim Sci, Columbia, MO 65211, USAMinitube Amer, Verona, WI 53593, USAAmer Soc Agron, Madison, WI 53711, USAINIFAP SAGAR, CE Mococha, Merida 97200, Yucatan, MexicoWake Forest Univ, Bowman Gray Sch Med, Winston Salem, NC 27157, USAEMBRAPA Suinos & Aves, Concordia, SC, BrazilRocky Mt Reprod Serv Inc, Manhattan, MT 59741, USAKinder, JE, Univ Nebraska, Dept Anim Sci, Lincoln, NE 68583, USA TI - Regulation of frequency of luteinizing hormone pulses by magnitude of acute change in circulating concentration of progesterone of female cattle AB - The hypothesis was the greater the magnitude of acute increase in circulating concentration of progesterone of female cattle, the greater the acute inhibitory effect on frequency of pulsatile LH release. From Day 0 to 4 of the treatment period, females without functional corpora lutea were treated with varying doses of progesterone to result in varying concentrations of progesterone within the typical physiological range in blood. From Day 4 to 7, cattle were treated with a single dose of progesterone to achieve a similar circulating concentration of progesterone among all females in the study. Therefore, from Day 0 to 4 relative to Day 4 to 7 of the treatment period, females had a: (1) large (3.1 ng/ml), (2) moderate (2.5 ng/ml), or (3) small (0.5 ng/ml) increase in concentration of progesterone in blood. Frequency of LH pulses was greater (P < 0.10) in females with the greatest magnitude of change in concentration of progesterone during the first 24h following the change in concentration as compared with females with the moderate or small of change in concentration of progesterone suggesting our working hypothesis should be rejected. The greater the magnitude of acute change in concentration of progesterone, however, the longer time required for re-initiation of release of LH pulses of the amplitude of pulses that preceded the change in concentration of progesterone. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology U5 - J;Article AV - English IS - 0378-4320 UR - ISI:000223569700004 L2 - cattle-endocrinology;LH;progesterone;GONADOTROPIN-RELEASING-HORMONE; EXOGENOUS PROGESTERONE; GENERATOR ACTIVITY; ESTROUS-CYCLE; 17-BETA-ESTRADIOL; SECRETION; PATTERN; COWS; FOLLICLES; FEEDBACK SO - Animal Reproduction Science 2004 ;84(3-4):279-291 10760 UI - 4765 AU - Filip R AU - Chihu-Amparan L AU - Coman G AU - Velazquez ME AU - Silva J AD - Natl Publ Hlth Inst, Dept Bacterial Resistance, Ctr Res Infect Dis, Cuernavaca 62100, Morelos, MexicoNatl Publ Hlth Inst, Dept Clin Epidemiol, Ctr Res Infect Dis, Cuernavaca 62100, Morelos, MexicoUniv Med & Pharm Gr T Popa, Fac Med, Dept Microbiol, Iasi, RomaniaSilva, J, Natl Publ Hlth Inst, Dept Bacterial Resistance, Ctr Res Infect Dis, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62100, Morelos, Mexico TI - Molecular characterization of beta-lactam resistance of Salmonella isolates from pediatric patients in Romania AB - The molecular characterization of 16 clinical isolates of Salmonella enterica (14 serotype Typhimurium and 2 serotype Kingston) obtained between January and June 1999 from feces of children hospitalized in Iasi, Romania were genotypically compared by pulse field gel electrophoresis of XbaI restricted bacterial DNA. The majority of the clinical isolates (12/16) belonged to cluster A and (4/16) to unrelated strains, correlating to the OMP profile. Two major different patterns of beta-lactamases were identified: the first with pI of 5.4, 8.2 in 6/16 strains and the second with pI of 5.4 in 5/16. The bla(TEM) beta-lactamase was identified in 14/16 of the clinical isolates and the bla(SHV-5) gene in one strain. We concluded that extended spectrum beta-lactamase (ESBL) with pIs of 8.2 was the most frequent enzyme produced by serotype Typhimurium isolates which were related MH - Mexico|Morelos MH - Romania PB - FLORENCE: E I F T SRL RP - NOT IN FILE U3 - TC 2 U4 - Oncology;Pathology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1120-009X UR - ISI:000223141700004 L2 - Salmonella enterica;Typhimurium;PFGE;extended-specrum beta-lactamases;FIELD GEL-ELECTROPHORESIS; KLEBSIELLA-PNEUMONIAE; NUCLEOTIDE-SEQUENCE; DNA; TYPHIMURIUM; OUTBREAK; PLASMID; GENE; TEM SO - Journal of Chemotherapy 2004 ;16(4):337-342 10761 UI - 5554 AU - Filkorn HF AU - Alor JP AD - Nat Hist Museum Los Angeles Cty, Dept Invertebrate Paleontol, Los Angeles, CA 90007, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoFilkorn, HF, Nat Hist Museum Los Angeles Cty, Dept Invertebrate Paleontol, 900 Exposit Blvd, Los Angeles, CA 90007 USA TI - A new early cretaceous coral (Anthozoa; Scleractinia; Dendrophylliina) and its evolutionary significance AB - A new coral, Blastozopsammia guerreroterion, from the mid-Cretaceous (upper Albian-lower Cenomanian) Mal Paso Formation of southwestern Mexico is the earliest known and the first Mesozoic colonial member of the Dendrophylliidae, an extant worldwide group. Blastozopsammia is characterized by a ramose corallum produced by extratentacular budding, dimorphic corallites, and branches with a continuous axial corallite sheathed in an orderly arrangement of radially arrayed secondary corallites and a robust layer of reticulate coenosteum. This growth form is similar to that of many modern reef-building species of Acropora Oken, 1815 and species of the nonreefal Petrophyllia Conrad, 1855 (=Archohelia Vaughan, 1919). Based on corallite configuration, growth form and analogy with Acropora, Blastozopsammia had a relatively high degree of colony integration and may have been zooxanthellate. The combination of an axial corallite with radially arrayed secondary corallites has been regarded as one of the morphological and ecological pinnacles of coral evolution, yet it is rare among the Scleractinia. This growth form has not been recognized in any Cenozoic dendrophylliids. Blastozopsammia is an evolutionary enigma because no ancestral lineage or closely related taxon has been identified. However, the most likely origin of colonial Dendrophylliidae is Jurassic or Early Cretaceous Actinacididae MH - USA MH - Mexico|Distrito Federal PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Paleontology U5 - J;Review AV - English IS - 0022-3360 UR - ISI:000221268100004 L2 - MEXICO; STRATIGRAPHY; GENUS SO - Journal of Paleontology 2004 ;78(3):501-512 10762 UI - 4662 AU - Firmani C AU - vila-Reese V AU - Ghisellini G AU - Tutukov AV AD - Osserv Astron Brera, I-23807 Merate, ItalyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Astron, Moscow 109017, RussiaFirmani, C, Osserv Astron Brera, Via E Bianchi 46, I-23807 Merate, Italy TI - Formation rate, evolving luminosity function, jet structure, and progenitors for long gamma-ray bursts AB - We constrain the isotropic luminosity function (LF) and formation rate of long gamma-ray bursts (GRBs) by fitting models jointly to both the observed differential peak-flux and redshift distributions. We find evidence supporting an evolving LF, where the luminosity scales as (1+z)(delta), with an optimal delta of 1.0+/-0.2. For a single-power law LF, the best slope is approximately -1.57 with an upper luminosity of 10(53.3) ergs s(-1), while the best slopes for a double-power law LF are approximately -1.6 and -2.6, with a break luminosity of 10(52.7) ergs s(-1). Our finding implies a jet model intermediate between the universal structured epsilon(theta)proportional to theta(-2) model and the quasi-universal Gaussian structured model. For the uniform-jet model our result is compatible with an angle distribution between 2degrees and 15degrees. Our best-constrained GRB formation rate histories increase from z=0 to 2 by a factor of similar to30 and then continue increasing slightly. We connect these histories to the cosmic star formation history and compare with observational inferences up to zsimilar to6. GRBs could be tracing the cosmic rates of both the normal and obscured star formation regimes. We estimate a current GRB event rate in the Milky Way of similar to5x10(-5) yr(-1) and compare it with the birthrate of massive close Wolf-Rayet+black hole binaries with orbital periods of hours. The agreement is rather good, suggesting that these systems could be the progenitors of the long GRBs MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 37 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223403400034 L2 - binaries : close;black hole physics;cosmology : observations;gamma rays : bursts;ISM : jets and outflows;stars : Wolf-Rayet;STANDARD ENERGY RESERVOIR; AFTERGLOW LIGHT CURVES; COSMIC STAR-FORMATION; REDSHIFT DISTRIBUTION; HOST GALAXIES; EVOLUTION; HISTORY; SUBMILLIMETER; PREDICTIONS; POPULATION SO - Astrophysical Journal 2004 ;611(2):1033-1040 10763 UI - 4487 AU - Fisher JB AU - Vovides AP AD - Fairchild Trop Bot Garden, Coral Gables, FL 33156, USAFlorida Int Univ, Dept Biol Sci, Miami, FL 33199, USAInst Ecol AC, Xalapa 91000, Veracruz, MexicoFisher, JB, Fairchild Trop Bot Garden, Coral Gables, FL 33156, USA TI - Mycorrhizae are present in cycad roots AB - We describe the occurrence of arbuscular mycorrhizae in the roots of Zamia pumila and Dioon edule. Seedlings were grown on native, unsterilized soil taken from local pinelands of south Florida, where Z pumila occurs naturally. Arbuscules, hyphae, hyphal coils, and vesicles occur in the parenchyma cells of the root cortex, especially the half of the cortex next to the stele. Hyphae of the arbuscular mycorrhizal fungi (AMF) occur mainly in longitudinal intercellular spaces and conform to the Acorus type. The finest, ultimate roots have AMF, but these roots are extremely brittle, detach with the slightest disturbance, and are usually lost when plants are uprooted from the ground. No AMF were found in the cortex of coralloid roots. Vovides (1991) previously reported that AMF occur on Dioon edule and Ceratozamia mexicana and we reconfirm this in D. edule. In this species, AMF appear to be mostly associated with the outer and to a lesser extent the inner cortex. However, roots of a potted plant of C hildae growing in native soil lacked AMF. When grown on low phosphorus soils, legumes are known to require AMF in order for their Rhizobium nodules to fix nitrogen. Without AMF, the legumes are deficient in phosphor-us, which inhibits nodule production and nitrogen fixation. It is probable that cycads, with their nitrogen-fixing coralloid roots containing Nostoc, may also require AMF for successful nitrogen fixation when phosphor-us is limiting MH - Mexico|Veracruz MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0006-8101 UR - ISI:000223771500003 L2 - FOREST SO - Botanical Review 2004 ;70(1):16-23 10764 UI - 4384 AU - Fitzgerald TD AU - Pescador-Rubio A AU - Turna MT AU - Costa JT AD - SUNY Coll Cortland, Dept Biol Sci, Cortland, NY 13045, USAUniv Colima, Ctr Univ Invest & Desarrollo Agropecuario, Colima, MexicoSUNY Binghamton, Dept Biol Sci, Binghamton, NY, USAWestern Carolina Univ, Dept Biol, Cullowhee, NC 28723, USAFitzgerald, TD, SUNY Coll Cortland, Dept Biol Sci, Cortland, NY 13045 USA TI - Trail marking and processionary behavior of the larvae of the weevil Phelypera distigma (Coleoptera : Curculionidae) AB - We present here the results of an investigation of the behavioral bases of the first documented instance of trail marking and processionary behavior in a beetle. The larvae of Phelypera distigma (Coleoptera: Curculionidae) forage communally, moving over the host plant in head-to-tail processions. Our study shows that the larvae secrete a pheromone from the ventral surface of the posterior abdomen that both elicits and guides the collective locomotion of the cohort. The pheromone is soluble in acetone and other nonpolar solvents and is relatively short-lived, eliciting trail following for less than 4 h after its deposition. When in processionary formations, larvae stimulate locomotion in others by rapidly bobbing their heads against sets of setae that occur on the lateral flanks of the posterior tips of the abdomens of precedent individuals. Larvae are also strongly attracted to tactile or chemotactile stimuli found at the tip of the abdomen of other larvae and their response to lures made of eviscerated abdomens show that such stimuli take precedence over the trail pheromone in eliciting and orienting locomotion. The cycloalexic formations adopted by resting larvae maximize the amount of body contact possible in a two-dimensional aggregate and allow tactile signals to rapidly radiate through the groups, alerting all members of a cohort to the onset of bouts of activity MH - Mexico|Colima MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0892-7553 UR - ISI:000224028900005 L2 - Phelypera distigma;trail pheromone;processionary;foraging;Curculionidae;HERRICH-SCHAFFER LEPIDOPTERA; LECONTEI FITCH HYMENOPTERA; TENT CATERPILLAR; LIFE-HISTORY; PHEROMONE; COMMUNICATION; SATURNIIDAE; 5-BETA-CHOLESTANE-3,24-DIONE; THAUMETOPOEIDAE; LASIOCAMPIDAE SO - Journal of Insect Behavior 2004 ;17(5):627-646 10765 UI - 5257 AU - Fleming KE AU - Bohnsack JF AU - Palacios GC AU - Takahashi S AU - Adderson EE AD - St Jude Childrens Hosp, Dept Infect Dis, Memphis, TN 38105, USAUniv Utah, Sch Med, Dept Pediat, Salt Lake City, UT, USAUniv Utah, Sch Med, Dept Pathol, Salt Lake City, UT, USAInst Mexicano Seguro Social, Mexico City, DF, MexicoJoshi Eiyoh Univ, Dept Microbiol, Sakano, JapanAdderson, EE, St Jude Childrens Hosp, Dept Infect Dis, 332 N Lauderdale St, Memphis, TN 38105 USA TI - Equivalence of high-virulence clonotypes of serotype III group B Streptococcus agalactiae (GBS) AB - Analysis of growth characteristics, multilocus enzyme electrophoresis, restriction digest pattern (RDP) typing and multilocus sequence typing have identified clonotypes of serotype III group B Streptococcus agalactiae (GIBS) associated with invasive infection in neonates. This study sought to unify phenotypic and genotypic classifications of type III GBS strains associated with increased virulence in newborns. High-virulence clonotype (HVC) strains possessed the translation initiation factor 2 (infB) C allele, found in RDP type III-3 strains, and hybridized with the RDP type III-3-specific probe AA3.6, whereas non-HVC strains shared the infB A allele and genomic DNA from these strains did not hybridize with the AA3.6 probe. The characteristic growth lag of HVC GBS at 40degreesC has been attributed to the presence of a heat-labile fructose-1,6-bisphosphate aldolase (Fba) enzyme in these strains. The deduced amino acid sequence of fba genes of both HVC and non-HVC strains, however, were identical. HVC and RDP type III-3 represent the same genetically related group of bacteria. The characteristic growth differences of virulent strains of type III GIBS, however, are not directly attributable to differences in fba MH - Japan MH - Mexico|Distrito Federal MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0022-2615 UR - ISI:000221981000006 L2 - INVASIVE NEONATAL DISEASE; GROWTH-CHARACTERISTICS; GENOME SEQUENCE; IDENTIFICATION; CLONE; 40-DEGREES-C; PATTERNS; PATHOGEN; SYSTEM; INFB SO - Journal of Medical Microbiology 2004 ;53(6):505-508 10766 UI - 4929 AU - Fleury A AU - Dessein A AU - Preux PM AU - Dumas M AU - Tapia G AU - Larralde C AU - Sciutto E AD - Inst Nacl Neurol & Neurocirugia Insurgentes, Mexico City 14269, DF, MexicoFac Med, INSERM, Unite 399, Marseille, FranceUNAM, Inst Invest Biomed, Mexico City, DF, MexicoFac Med, Inst Epidemiol Neurol & Neurol Trop, Limoges, FranceUNAM, Fac Med Vet & Zootecn, Mexico City, DF, MexicoCtr Int Ciencias AC, Cuernavaca, Morelos, MexicoFleury, A, Inst Nacl Neurol & Neurocirugia Insurgentes, 3877 Col La Fama, Mexico City 14269, DF, Mexico TI - Symptomatic human neurocysticercosis - Age, sex and exposure factors relating with disease heterogeneity AB - Objective:. To evaluate the relevance of exposure and host biological factors in the heterogeneity of the clinical, radiological and inflammatory picture of neurocysticercosis (NCC). Methods:. 105 Mexican symptomatic NCC patients confirmed by imaging were studied before they received any specific treatment. The relationships studied were those between a) the patients' characteristics (gender, age and level of exposure), b) the type of clinical picture and c) the radiological and inflammatory characteristics of the disease (number, aspect, localization of the parasites, and CSF leukocytecounts). Results:. Results Seizures were the most frequent symptom and multiple subarachnoid cysticerci the most frequent localization. Symptomatology related to the developmental stage, number and localization of the parasites as well as the CSF leukocyte-counts. The total number of cysticercal lesions and of vesicular cysticerci increased with age,whereas the number of colloidal cysticerci decreased. CSF leukocyte-counts were higher in women than in men. Levels of exposure did not correlate with the clinical and radiological pictures. Conclusions:. The variability found in the number, stage, localization and inflammation in the parasite lesions is strongly associated with the heterogeneity of NCC symptoms. The increased number of vesicular cysticerci and the decreased number of degenerating cysticerci with aging, as well as the prominence of inflammation in women suggest that immuno-endocrinological factors may play a role in susceptibility and pathogenesis. The data also show that with increasing age and exposure there is no increment in severity, a suggestion that there might be ways of regulating pathogenicity MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - DARMSTADT: DR DIETRICH STEINKOPFF VERLAG RP - NOT IN FILE U3 - TC 24 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0340-5354 UR - ISI:000222691600007 L2 - neurocysticercosis;parasite;heterogeneity;susceptibility;PARENCHYMAL BRAIN CYSTICERCOSIS; TAENIA-SOLIUM CYSTICERCOSIS; SCHISTOSOMIASIS-MANSONI; CRASSICEPS; INFECTION; IMMUNITY; PIGS; SUSCEPTIBILITY; REINFECTION; PREVALENCE SO - Journal of Neurology 2004 ;251(7):830-837 10767 UI - 6437 AU - Fleury A AU - Preux PM AU - Fragoso G AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirugia Manual Velazco Su, Mexico City, DF, MexicoInst Epidemiol Neurol & Neurol Trop IENT, Limoges, FranceFragoso, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Apartado Postal 70228, Mexico City 04510, DF, Mexico TI - Use of the capture-recapture method for determining the prevalence of neurological parasitic diseases: A reply MH - France MH - Mexico|Distrito Federal PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health;Clinical Neurology U5 - J;Letter AV - English IS - 0251-5350 UR - ISI:000188326100015 SO - Neuroepidemiology 2004 ;23(1-2):99-100 10768 UI - 3476 AU - Fliess M AU - Join C AU - Mboup M AU - Sira-Ramirez H AD - Ecole Polytech, INRIA, Equipe ALIEN, Futurs & Lab STIX, F-91128 Palaiseau, FranceUniv Nancy 1, INRIA, Equipe ALIEN, Futurs & Ctr Rech Automat Nancy, F-54506 Vandoeuvre Les Nancy, FranceUniv Paris 05, Equipe ALIEN, INRIA, Futurs & UFR Math & Informat, F-75270 Paris, FranceIPN, CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, MexicoFliess, M, Ecole Polytech, INRIA, Equipe ALIEN, Futurs & Lab STIX, F-91128 Palaiseau, France TI - Differential compression of noisy transient signals AB - The analysis and compression of noisy transient signals are, handled via methods stemming from elementary differential algebra. noncommutative algebra and operational calculus. The efficiency of our approach. is illustrated by an academic example and a more concrete case-study which is a musical signal MH - France MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000226325500013 SO - Comptes Rendus Mathematique 2004 ;339(11):821-826 10769 UI - 3899 AU - Fliess M AU - Join C AU - Sira-Ramirez H AD - Ecole Polytech, Lab STIX, F-91128 Palaiseau, FranceUniv Nancy 1, CRAN, CNRS, UMR 7039, F-54506 Vandoeuvre Les Nancy, FranceIPN, CINVESTAV, Seccio Mecatron, Dept Ingn Elect, Mexico City 07300, DF, MexicoFliess, M, Ecole Polytech, Lab STIX, F-91128 Palaiseau, France TI - Robust residual generation for linear fault diagnosis: an algebraic setting with examples AB - Several examples with their computer simulations, including a concrete case-study of a two mass system, are enlightening our viewpoint. Our methods, which are mainly of algebraic flavour (module theory, differential algebra, and operational calculus), are borrowed from recent works on control and identification MH - France MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000225135300001 L2 - FAILURE-DETECTION; DYNAMIC-SYSTEMS; PREDICTIVE CONTROL; REDUNDANCY; FRAMEWORK; FLATNESS; OBSERVER; DESIGN; OUTPUT SO - International Journal of Control 2004 ;77(14):1223-1242 10770 UI - 6105 AU - Fliess M AU - Sira-Ramirez H AD - Ecole Polytech, Lab STIX, F-91128 Palaiseau, FranceIPN, Secc Mecatron, Dept Ingn Elect, CINVESTAV, Mexico City, DF, MexicoFliess, M, Ecole Polytech, Lab STIX, F-91128 Palaiseau, France TI - State reconstructors AB - In contrast to Kalman filters and asymptotic observers, the state reconstructors do not need the integration of differential equations. They eliminate structured perturbations and are robust with respect to noises without any precise knowledge of their statistical properties. The techniques used are, primarily, of algebraic nature. (C) 2003 Academie des sciences. Publie par Elsevier SAS. Tons droits reserves MH - France MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 10 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000189282300019 SO - Comptes Rendus Mathematique 2004 ;338(1):91-96 10771 UI - 4527 AU - Flisser A AU - Gauci CG AU - Zoli A AU - Martinez-Ocana J AU - Garza-Rodriguez A AU - Dominguez-Alpizar JL AU - Maravilla P AU - Rodriguez-Canul R AU - Avila G AU - guilar-Vega L AU - Kyngdon C AU - Geerts S AU - Lightowlers MW AD - Univ Melbourne, Ctr Vet Clin, Werribee, Vic 3030, AustraliaUniv Dschang, Fac Agr, Dept Anim Prod, Taeniasis Cysticercosis Project, Dschang, CameroonPrins Leopold Inst Trop Geneeskunde, Antwerp, BelgiumUNAM, Fac Med, Dept Microbiol & Parasitol, Mexico City, DF, MexicoFac Med Vet, Merida, Yucatan, MexicoCINVESTAV, Merida, Yucatan, MexicoLightowlers, MW, Univ Melbourne, Ctr Vet Clin, 250 Princes Highway, Werribee, Vic 3030, Australia TI - Induction of protection against porcine cysticercosis by vaccination with recombinant oncosphere antigens AB - Two recombinant Taenia solium oncosphere antigens, designated TSOL18 and TSOL45-1A, were investigated as vaccines to prevent transmission of the zoonotic disease cysticercosis through pigs. Both antigens were effective in inducing very high levels of protection (up to 100%) in three independent vaccine trials in pigs against experimental challenge infection with T. solium eggs, which were undertaken in Mexico and Cameroon. This is the highest level of protection that has been achieved against T. solium infection in pigs by vaccination with a defined antigen. TSOL18 and TSOL45-1A provide the basis for development of a highly effective practical vaccine that could assist in the control and, potentially, the eradication of human neurocysticercosis MH - Australia MH - Belgium MH - Cameroon MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 26 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000223580400042 L2 - TAENIA-SOLIUM CYSTICERCOSIS; EG95 HYDATID VACCINE; CESTODE PARASITES; ESCHERICHIA-COLI; PEPTIDE VACCINE; OVIS; PIGS; IMMUNIZATION; RESPONSES; SAGINATA SO - Infection and Immunity 2004 ;72(9):5292-5297 10772 UI - 4330 AU - Floran B AU - Floran L AU - Erlij D AU - Aceves J AD - IPN, CINVESTAV, Dept Fisiol, Mexico City 07360, DF, MexicoSuny Downstate Med Ctr, Dept Physiol, Brooklyn, NY 11203, USAAceves, J, IPN, CINVESTAV, Dept Fisiol, Avenida IPN 2508, Mexico City 07360, DF, Mexico TI - Dopamine D4 receptors inhibit depolarization-induced [H-3]GABA release in the rat subthalamic nucleus AB - We explored the role of dopamine D4 receptors on [H-3]GABA release in the subthalamic nucleus. [3H]GABA release was evoked by high K+ in slices of the nucleus. The selective dopamine D4 receptor agonist PD168,077 (N-[[4-(2-cyanophenyl)-1-piperazynil]methyl]-3-methyl-benzamide) inhibited GABA release with greater potency (EC50=3.2 nM) than quinpirole (EC50=200 nM). SKF 21297 (6-chloro-7,8-dihydroxy-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine hydrobromide), a dopamine D1-like receptor agonist, had no effect. L-745,870 (3{[4-(4-chlorophenyl)piperazin-1-yl]methyl}-1-1H-pyrolio[2,3-b] pyridine), a selective dopamine D4 receptor antagonist, reverted the quinpirole inhibition with greater potency (IC50=8.7 nM) than that of the dopamine D2/D3 receptor antagonist sulpiride and raclopride (IC50=4804 and 788 nM, respectively). Both methylphenidate and methamphetamine, dopamine reuptake blockers, inhibited by 30% high K+-evoked GABA release; the inhibition was blocked by L-745,870. These results show that dopamine D4 receptors modulate GABA release in the subthalamic nucleus. The results would explain how agents that increase interstitial dopamine like methylphenidate and amphethamine might control locomotor hyperactivity seen in disorders of dopamine D4 receptors. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000224044100013 L2 - dopamine receptor;GABA transmission;hyperactivity disorder;BASAL GANGLIA; NEURONS; INNERVATION; HYPERACTIVITY; ACTIVATION; DISORDER; AGONISTS SO - European Journal of Pharmacology 2004 ;498(1-3):97-102 10773 UI - 5870 AU - Floran B AU - Floran L AU - Erlij D AU - Aceves J AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Mexico City 07360, DF, MexicoSUNY Downstate Med Ctr, Dept Physiol, Brooklyn, NY 11203, USAFloran, B, IPN, Ctr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Av IPN 2508 San Pedro Zacatenco,Apartado Postal 1, Mexico City 07360, DF, Mexico TI - Activation of dopamine D4 receptors modulates [H-3]GABA release in slices of the rat thalamic reticular nucleus AB - The thalamic reticular nucleus (nRt) is innervated by dopaminergic projections from the sustantia nigra compacta, (SNc) and is rich in dopamine D4 receptors, however, the functional effects of dopamine on this structure are unknown. We examined whether the D1 receptor agonist SKF 38393, or the D2 class receptor agonist quinpirole, modify depolarization evoked Ca2+-dependent [H-3]GABA release. SKF 38393 was without effects, whereas quinpirole inhibited [3 H]GABA release with an IC50 of 81 +/- 33 nM. Dose-dependence determinations of agonists (quinpirole and PD 168, 077) and antagonists (L-745,870, U-101958, clozapine and raclopride) with different affinities for different D2 class subtype receptors showed that a D4 receptor mediates quinpirole inhibition. We used methylphenidate, an agent that acts by increasing interstitial dopamine, to determine whether endogenous dopamine modulates [H-3]GABA release. Methylphenidate inhibited [H-3]GABA release showing that the nRt contains sufficient endogenous dopamine to activate D4 receptors. This inhibition was completely reversed by selectively blocking D4 receptors with L-745,870 or U-101958 indicating that the catecholamine receptors that modulate GABA release are D4 receptors. Given the importance of the nRt in the control of attention, sensory processing and the generation of rhythmic activity during slow wave sleep.. it is possible that abnormal nRt function may generate some of the manifestations of the disorders of dopaminergic transmission. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-3908 UR - ISI:000220418300005 L2 - thalamic reticular nucleus.;dopamine D4 receptors;attention deficit/hyperactive disorder;GABA;methylphenidate;ATTENTION-DEFICIT/HYPERACTIVITY DISORDER; DEFICIT HYPERACTIVITY DISORDER; D-4 RECEPTOR; CELLULAR-DISTRIBUTION; MEDIATED INHIBITION; GLOBUS-PALLIDUS; BASAL GANGLIA; BRAIN; NEURONS; LOCALIZATION SO - Neuropharmacology 2004 ;46(4):497-503 10774 UI - 4045 AU - Flores-Gutierrez GH AU - Infante F AU - Salinas-Melendez JA AU - Thomas CB AU - Estrada-Bellmann PC AU - Briones-Encinia F AD - Univ Autonoma Tamaulipas, UAM Reynosa Aztlan, Reynosa 88740, Tamaulipas, MexicoUniv Autonoma Tamaulipas, UAM Agron & Ciencias, Ctr Univ Adolfo Lopez Mateos, Cd Victoria 87149, Tamaulipas, MexicoUniv Autonoma Nuevo Leon, Fac Med Vet & Zootecn, Unidad Mederos, Monterrey, NL, MexicoUniv Wisconsin, Sch Vet Med, Madison, WI 53706, USAFlores-Gutierrez, GH, Univ Autonoma Tamaulipas, UAM Reynosa Aztlan, Calle 16 & Lago Chapala, Reynosa 88740, Tamaulipas, Mexico TI - Development of an immunobinding assay with monoclonal antibodies to diagnose Mycoplasma bovis in semen MH - Mexico|Nuevo Leon MH - Mexico|Tamaulipas MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0165-7380 UR - ISI:000224725300004 L2 - immunobinding dot-blot assay;monoclonal antibodies;Mycoplasma bovis;semen;FILTRATION MF DOT; RUMINANT MYCOPLASMAS; BOVIGENITALIUM; IDENTIFICATION; INFERTILITY; INFECTIONS; BULLS; PCR SO - Veterinary Research Communications 2004 ;28(8):681-686 10775 UI - 6081 AU - Flores-Ibarra M AU - Estrella-Valenzuela G AD - Univ Autonoma Baja California, Inst Invest Sociales, Mexicali 21100, Baja California, MexicoUniv Autonoma Baja California, Inst Invest Ciencias Vet, Mexicali 21100, Baja California, MexicoEstrella-Valenzuela, G, POB 3651, Calexico, CA 92232, USA TI - Canine ecology and socioeconomic factors associated with dogs unvaccinated against rabies in a Mexican city across the US-Mexico border AB - A cross-sectional study was conducted to identify ecologic and socioeconomic factors associated with dogs unvaccinated against rabies in Mexicali, the capital city of Baja California, Mexico (located across the US-Mexico border). A total of 1100 households were selected by random sampling from a list of all 180,000 households. A questionnaire was filled in during a personal interview with the household head or another adult person to gather information of epidemiological interest (such as canine ecology, social and economic factors that might influence owners' decision to allow their dog to be vaccinated). There were 910 dogs identified. The human-to-dog ratio was 4.3:1. The male-to-female dog ratio was 1.5:1. Out of 791 dogs greater than or equal to3 months old, 577 (73%) were classified as vaccinated against rabies. Most dogs (95%) were not spayed. Neighborhood dogs had 25 times higher risk of nonvaccination compared to dogs owned by a family. Dogs 3-11 months old had three times higher risk of nonvaccination compared to dogs greater than or equal to1 year old. Dogs that were obtained as a gift, born at home or found had two times higher risk of nonvaccination compared to dogs that were reportedly purchased. Crossbred dogs had 1.5 times higher risk of nonvaccination compared to purebred dogs. The canine-ecology structure is similar to that in regions were rabies is endemic. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0167-5877 UR - ISI:000189285300001 L2 - dog ecology;rabies;vaccination;US-Mexico border SO - Preventive Veterinary Medicine 2004 ;62(2):79-87 10776 UI - 5438 AU - Flores-Lopez CZ AU - Flores-Lopez LZ AU - Aguirre G AU - Hellberg LH AU - Parra-Hake M AU - Somanathan R AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoSomanathan, R, San Diego State Univ, 5500 Campanile Dr, San Diego, CA 92182 USA TI - Ruthenium(II)-assisted asymmetric hydrogen transfer reduction of acetophenone using chiral tridentate phosphorus-containing ligands derived from (1R, 2R)-1,2-diaminocyclohexane AB - Several chiral and unsymmetrical tridentate [NNP]-type ligands with sp(2)-N and sp(3)-N were synthesized from monosulfonamide of (1R, 2R)-1,2-diaminocyclohexane and 2-(diphenylphosphino)benzaldehyde. Their ruthenium(II) complexes have been used in the enantioselective asymmetric hydrogen transfer reduction of acetophenone in 2-propanol with selectivities in the range 14-99% e.e. The good enantioselectivity with the ligands with sp(2)-N and sp(3)-N is believed to be due to formation of hexacoordinated complexes with a 2:1 ligand to metal ratio. (C) 2004 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000221512600009 L2 - asymmetric;Ruthenium(II);transfer;hydrogenation;Schiff base;QUATERNARY AMINO-ACIDS; AROMATIC KETONES; SCHIFF-BASES; TETRADENTATE LIGANDS; ALLYLIC ALKYLATION; ALPHA-KETOESTERS; COMPLEXES; CATALYSIS; DERIVATIVES; (1R,2R)-1,2-DIAMINOCYCLOHEXANE SO - Journal of Molecular Catalysis A-Chemical 2004 ;215(1-2):73-79 10777 UI - 5663 AU - Flores-Ramirez S AU - Miller RD AU - Urban-Ramirez J AD - Univ Autonoma Baja California, Dept Biol Marina, Area Ciencias Mar, La Paz 23000, Baja Calif Sur, MexicoUniv New Mexico, Dept Biol, Albuquerque, NM 87131, USAFlores-Ramirez, S, Univ Autonoma Baja California, Dept Biol Marina, Area Ciencias Mar, Apdo 19-B, La Paz 23000, Baja Calif Sur, Mexico TI - Major histocompatibility complex I polymorphism in a cetacean: The gray whale (Eschrichtius robustus) AB - Vertebrate Major Histocompatibility Complex-I (Mhc-I) proteins bind and display self and foreign peptides on the cell surface. Mhc-I polymorphism is considered critical for eliciting immune responses to a diversity of antigens, and thus, for the health and conservation of a species. Based on restriction fragment length polymorphism it was concluded that whales generally have low Mhc-I polymorphism. This was attributed to the weak pathogenic pressure in aquatic habitats. Since gray whales' habits might favor their encounter with diverse pathogens, resulting in selection pressures for Mhc variability, we searched for functional polymorphism of gray whale's Mhc-I exon 2 sequences that encode the alpha-I protein domain of the antigen-binding region. We sequenced twelve Mhc-I exon 2 clones from each of seven gray whales. Most obtained sequences were similar to functional artiodactyl sequences, and their reconstructed phylogeny consistently showed three whale Mhc-I exon 2 sequence clusters (A, B, and C). Sequences within a given cluster and from distinct clusters, showed a greater number of non-synonymous than synonymous substitutions, that commonly shifted the physiochemical properties of the involved residue, suggesting the existence of a diverse repertoire of Mhc-I antigen recognition sites in gray whales, and that selection maintains gray whale's Mhc-I allelic diversity MH - Mexico|Baja California Sur MH - USA PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000220806900006 L2 - LIMITED MHC POLYMORPHISM; HLA-B; NUCLEOTIDE SUBSTITUTIONS; DELPHINAPTERUS-LEUCAS; SEQUENCE VARIATION; LOCI; EVOLUTION; POPULATION; DIVERSITY; MOLECULES SO - Marine Mammal Science 2004 ;20(2):262-273 10778 UI - 3932 AU - Flores G AU - Mischaikow K AD - Univ Nacl Autonoma Mexico, IIMAS, Mexico City 01000, DF, MexicoGeorgia Inst Technol, Sch Math, Ctr Dynam Syst & Nonlinear Studies, Atlanta, GA 30332, USAFlores, G, Univ Nacl Autonoma Mexico, IIMAS, Apdo Postal 20-726, Mexico City 01000, DF, Mexico TI - Selection of slow diffusion in a reaction diffusion model: Limiting cases MH - Mexico|Distrito Federal MH - USA PB - TEMPE: ROCKY MT MATH CONSORTIUM RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0035-7596 UR - ISI:000224904000007 L2 - PERMANENCE SO - Rocky Mountain Journal of Mathematics 2004 ;34(4):1299-1324 10779 UI - 4198 AU - Fofanov Y AU - Luo Y AU - Katili C AU - Wang J AU - Belosludtsev Y AU - Powdrill T AU - Belapurkar C AU - Fofanov V AU - Li TB AU - Chumakov S AU - Pettitt BM AD - Univ Houston, Dept Comp Sci, Houston, TX 77204, USAUniv Houston, Dept Chem, Houston, TX 77204, USAVitruvius Biosci, The Woodlands, TX, USAUniv Guadalajara, Dept Phys, Guadalajara 44430, Jalisco, MexicoFofanov, Y, Univ Houston, Dept Comp Sci, 4800 Calhoun Rd, Houston, TX 77204 USA TI - How independent are the appearances of n-mers in different genomes? AB - Motivation: Analysis of statistical properties of DNA sequences is important for evolutional biology as well as for DNA probe and PCR technologies. These technologies, in turn, can be used for organism identification, which implies applications in the diagnosis of infectious diseases, environmental studies, etc. Results: We present results of the correlation analysis of distributions of the presence/absence of short nucleotide subsequences of different length ('n-mers', n = 5 - 20) in more than 1500 microbial and virus genomes, together with five genomes of multicellular organisms (including human). We calculate whether a given n-mer is present or absent (frequency of presence) in a given genome, which is not the usually calculated number of appearances of n-mers in one or more genomes (frequency of appearance). For organisms that are not close relatives of each other, the presence/absence of different 7-20mers in their genomes are not correlated. For close biological relatives, some correlation of the presence of n-mers in this range appears, but is not as strong as expected. Suppressed correlations among the n-mers present in different genomes leads to the possibility of using random sets of n-mers (with appropriately chosen n) to discriminate genomes of different organisms and possibly individual genomes of the same species including human with a low probability of error MH - USA MH - Mexico|Jalisco PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Biochemical Research Methods;Biotechnology & Applied Microbiology;Computer Science, Interdisciplinary Applications;Mathematical & Computational Biology;Statistics & Probability U5 - J;Article AV - English IS - 1367-4803 UR - ISI:000224481900012 L2 - BACTERIAL GENOMES; SEQUENCES; SIGNATURE; DNA SO - Bioinformatics 2004 ;20(15):2421-2428 10780 UI - 3980 AU - Foil LD AU - Coleman P AU - Eisler M AU - Fragoso-Sanchez H AU - Garcia-Vazquez Z AU - Guerrero FD AU - Jonsson NN AU - Langstaff IG AU - Li AY AU - Machila N AU - Miller RJ AU - Morton J AU - Pruett JH AU - Torr S AD - Louisiana State Univ, Ctr Agr, Dept Entomol, Baton Rouge, LA 70803, USALondon Sch Hyg & Trop Med, London WC1, EnglandCtr Trop Vet Med, Edinburgh, Midlothian, ScotlandCtr Nacl Serv Constatac Salud Anim, Carretera Fed Cuernavaca Cuautla, Progreso Jiutepec, Morelos, MexicoUSDA ARS, Knipling Bushland US Livestock Insects Res La, Kerrville, TX 78028, USAUniv Queensland, Sch Vet Sci, Brisbane, Qld 4072, AustraliaUSDA ARS, Cattle Fever Tick Res Lab, Mission, TX, USANat Resources Inst, Chatham ME4 4TB, Kent, EnglandFoil, LD, Louisiana State Univ, Ctr Agr, Dept Entomol, 402 Life Sci Bldg, Baton Rouge, LA 70803 USA TI - Factors that influence the prevalence of acaricide resistance and tick-borne diseases AB - This manuscript provides a summary of the results presented at a symposium organized to accumulate information on factors that influence the prevalence of acaricide resistance and tick-borne diseases. This symposium was part of the 19th International Conference of the World Association for the Advancement of Veterinary Parasitology (WAAVP), held in New Orleans, LA, USA, during August 10-14, 2003. Populations of southern cattle ticks, Boophilus microplus, from Mexico have developed resistance to many classes of acaricide including chlorinated hydrocarbons (DDT), pyrethroids, organ ophosphates, and formamidines (amitraz). Target site mutations are the most common resistance mechanism observed, but there are examples of metabolic mechanisms. In many pyrethroid resistant strains, a single target site mutation on the Na+ channel confers very high resistance (resistance ratios: >1000x) to both DDT and all pyrethroid acaricides. Acetylcholine esterase affinity for OPs is changed in resistant tick populations. A second mechanism of OP resistance is linked to cytochrome P450 monooxygenase activity. A PCR-based assay to detect a specific sodium channel gene mutation that is associated with resistance to permethrin has been developed. This assay can be performed on individual ticks at any life stage with results available in a few hours. A number of Mexican strains of B. microplus with varying profiles of pesticide resistance have been genotyped using this test. Additionally, a specific metabolic esterase with permethrin-hydrolyzing activity, CzEst9, has been purified and its gene coding region cloned. This esterase has been associated with high resistance to permethrin in one Mexican tick population. Work is continuing to clone specific acetylcholinesterase (AChE) and carboxylesterase genes that appear to be involved in resistance to organophosphates. Our ultimate goal is the design of a battery of DNA- or ELISA-based assays capable of rapidly genotyping individual ticks to obtain a comprehensive profile of their susceptibility to various pesticides. More outbreaks of clinical bovine babesisois and anaplasmosis have been associated with the presence of synthetic pyrethroid (SP) resistance when compared to OP and amidine resistance. This may be the result of differences in the temporal and geographic patterns of resistance development to the different acaricides. If acaricide resistance develops slowly, herd immunity may not be affected. The use of pesticides for the control of pests of cattle other than ticks can affect the incidence of tick resistance and tick-borne diseases. Simple analytical models of tick- and tsetse-bome diseases suggest that reducing the abundance of ticks, by treating cattle with pyrethroids for example, can have a variety of effects on tick-bome diseases. In the worst-case scenario, the models suggest that treating cattle might not only have no impact on trypanosomosis but could increase the incidence of tick-bome disease. In the best-case, treatment could reduce the incidence of both trypanosomosis and tick-bome diseases Surveys of beef and dairy properties in Queensland for which tick resistance to amitraz was known were intended to provide a clear understanding of the economic and management consequences resistance had on their properties. Farmers continued to use amitraz as the major acaricide for tick control after the diagnosis of resistance, although it was supplemented with moxidectin (dairy farms) or fluazuron, macrocyclic lactones or cypermethrin/ chlorfenvinphos. (C) 2004 Published by Elsevier B.V MH - Australia MH - United Kingdom MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000224789000012 L2 - tick control;Boophilus microplus;acaricide resistance;bovine babesiosis;tick-borne diseases;BOOPHILUS-MICROPLUS ACARI; SOUTHERN CATTLE TICK; TSETSE-FLIES DIPTERA; ACETYLCHOLINESTERASE CDNA; PYRETHROID RESISTANCE; MEXICAN STRAINS; POINT MUTATION; IXODIDAE; IDENTIFICATION; DELTAMETHRIN SO - Veterinary Parasitology 2004 ;125(1-2):163-181 10781 UI - 2501 AU - Fontaine C AU - Castillo P AU - Ramirez J AU - Peltre MJ AU - Warmont F AU - Louis C AU - Massiani P AD - Univ Paris 06, CNRS, UMR 7609, Lab React Surface, F-75252 Paris, France. UNAM, UNICAT, Dept Ingn Quim, Fac Quim,Lab 225, Mexico City 04510, DF, Mexico TI - Comparison of the thermal stability of Ru cationic complexes in BEA and Y zeolites AB - The transformation upon drying in air at different temperatures of ruthenium hexaammine cations exchanged in NaY and NaBEA zeolites was studied by UV-Visible spectroscopy. In agreernent with literature, [Ru(NH3)(6)](3+) in NaY was readily transformed into Ru-red and Ru-brown trimers and, the higher the temperature of drying, the higher the oligomerization process. On the contrary, the hexaammine Ru cation remained stable in NaBEA even after exposure of the sample to air at moderate temperatures. Mass spectrometry was used to follow the decomposition of the Ru complexes during temperature-programmed reduction. High Ru dispersions were obtained in all reduced samples, whatever the zeolitic support and the characteritics of the Ru complex before reduction MH - France MH - Mexico|Distrito Federal T3 - RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALSStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticlemassiani@ccrjussieu.fr0SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALPart A-CBBR47 AV - English IS - 0167-2991 UR - ISI:000227357201087 L2 - ruthenium cationic complexes;UV-Visible;BEA zeolite;dispersion;thermal stability SO - 2004 ;():1784-1790 10782 UI - 4533 AU - Fornoni J AU - Nunez-Farfan J AU - Valverde PL AU - Rausher MD AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolutiva, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana, Dept Biol, Mexico City 09340, DF, MexicoDuke Univ, Dept Biol, Durham, NC 27708, USAFornoni, J, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolutiva, Apartado Postal 70-275, Mexico City 04510, DF, Mexico TI - Evolution of mixed strategies of plant defense allocation against natural enemies AB - In this study we present a simple optimization model for the evolution of defensive strategies (tolerance and resistance) of plants against their natural enemies. The model specifically evaluates the consequences of introducing variable costs and benefits of tolerance and resistance and nonlinear cost-and-benefit functions for tolerance and resistance. Incorporating these assumptions, the present model of plant defense predicts different evolutionary scenarios, not expected by previous work. Basically, the presence of an adaptive peak corresponding to intermediate levels of allocation to tolerance and resistance can arise when the shape parameter of the cost function is higher than the corresponding of the benefit function. The presence of two alternatives peaks of maximum tolerance and maximum resistance occurs only when benefits of tolerance and resistance interact less than additive. Finally, the presence of one peak of maximum resistance or maximum tolerance depends on the relative values of the magnitude of costs for tolerance and resistance. An important outcome of our model is that under a plausible set of conditions, variable costs of tolerance and resistance can represent an important aspect involved in the maintenance of intermediate levels of tolerance and resistance, and in favoring adaptive divergence in plant defensive strategies among populations. The model offers a framework for future theoretical and empirical work toward understanding spatial variation in levels of allocation to different defensive strategies MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 12 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000223583900005 L2 - evolutionarily stable strategy;host-pathogen interaction;plant-herbivore interaction;resistance;tolerance;DATURA-STRAMONIUM; HERBIVOROUS INSECTS; LATITUDINAL CLINES; GENETIC-VARIATION; DEER HERBIVORY; MORNING GLORY; BRASSICA-RAPA; TOLERANCE; RESISTANCE; COSTS SO - Evolution 2004 ;58(8):1685-1695 10783 UI - 4549 AU - Forrest WJ AU - Sargent B AU - Furlan E AU - D'Alessio P AU - Calvet N AU - Hartmann L AU - Uchida KI AU - Green JD AU - Watson DM AU - Chen CH AU - Kemper F AU - Keller LD AU - Sloan GC AU - Herter TL AU - Brandl BR AU - Houck JR AU - Barry DJ AU - Hall P AU - Morris PW AU - Najita J AU - Myers PC AD - Univ Rochester, Dept Phys & Astron, Rochester, NY 14627, USACornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095, USAIthaca Coll, Dept Phys, Ithaca, NY 14850, USASterrewacht Leiden, NL-2300 RA Leiden, NetherlandsCALTECH, Spitzer Sci Ctr, Pasadena, CA 91125, USANatl Opt Astron Observ, Tucson, AZ 85719, USAForrest, WJ, Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA TI - Mid-infrared spectroscopy of disks around classical T Tauri stars AB - We present the first Spitzer Space Telescope Infrared Spectrograph observations of the disks around classical T Tauri stars: spectra in the 5.2-30 mum range of six stars. The spectra are dominated by emission features from amorphous silicate dust, and a continuous component from 5 to 8 mum that in most cases comprises an excess above the photosphere throughout our spectral range. There is considerable variation in the silicate feature/continuum ratio, which implies variations of inclination, disk flaring, and stellar mass accretion rate. In most of our stars, structure in the silicate feature suggests the presence of a crystalline component. In one, CoKu Tau/4, no excess above the photosphere appears at wavelengths shortward of the silicate features, similar to 10 Myr old TW Hya, Hen 3-600, and HR 4796A. This indicates the optically thick inner disk is largely absent. The silicate emission features with peaks at 9.7 and 18 mum indicate small dust grains are present. The extremely low 10-20 mum color temperature of the dust excess, 135 K, indicates these grains are located more than 10 AU from the star. These features are suggestive of gravitational influence by planets or close stellar companions and grain growth in the region within 10 AU of the star, somewhat surprising for a star this young (1 Myr) MH - Mexico|Michoacan MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 47 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000223634300081 L2 - circumstellar matter;infrared : stars;planetary systems : protoplanetary disks;stars : individual (CoKu Tauri/4);stars : pre-main-sequence;stars : variables : other;SPECTRAL ENERGY-DISTRIBUTIONS; MAIN-SEQUENCE EVOLUTION; AURIGA MOLECULAR CLOUD; YOUNG STELLAR OBJECTS; ACCRETION DISKS; GRAIN-GROWTH; MICRON SPECTROSCOPY; DUST; TRAPEZIUM; BINARIES SO - Astrophysical Journal Supplement Series 2004 ;154(1):443-447 10784 UI - 3047 AU - Fort P AU - Bordais A AU - Estrada-Mena FJ AU - Yaffe D AU - Nudel U AU - Sahel JA AU - Rendon A AD - Univ Paris 06, Hop St Antoine, INSERM U592, Inst Vis, F-75252 Paris 05, FranceInst Mexicano Seguro Social, Unidad Invest Med Genet Humana, Mexico City, DF, MexicoWeizmann Inst Sci, IL-76100 Rehovot, Israel TI - Molecular characterization in isolated Muller glial cells of the functional complexes of Dp71 and/or utrophin with Kir4.1 and AQP4 MH - France MH - Israel MH - Mexico|Distrito Federal PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338202465 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U626-U626 10785 UI - 5240 AU - Fosalba P AU - Gaztanaga E AD - Inst Astrophys, F-75014 Paris, FranceCSIC, IEEC, ES-08034 Barcelona, SpainINAOE, Puebla 7200, MexicoFosalba, P, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96815 USA TI - Measurement of the gravitational potential evolution from the cross-correlation between WMAP and the APM Galaxy Survey AB - Models with late-time cosmic acceleration, such as the A-dominated cold dark matter model, predict a freeze-out for the growth of linear gravitational potential at moderate redshift z < 1, which can be observed as temperature anisotropies in the cosmic microwave background (CMB): the so-called integrated Sachs-Wolfe (ISW) effect. We present a direct measurement of the ISW effect based on the angular cross-correlation function, W-TG(θ), of CMB temperature anisotropies and dark matter fluctuations traced by galaxies. We cross-correlate the first-year WMAP data in combination with the APM Galaxy Survey. On the largest scales, θ = 4&DEG;-10&DEG;, we detect a non-vanishing cross-correlation at 98.8 per cent significance level, with a 1σ error Of W-TG = 0.35 &PLUSMN; 0.14 μK, which favours large values of &UOmega;(&ULambda;) &SIME; 0.8 for flat Friedmann-Robertson-Walker models. On smaller scales, 0 < 1degrees, the correlations disappear. This is contrary to what would be expected from the ISW effect, but the absence of correlations may be simply explained if the ISW signal was being cancelled by anti-correlations arising from the thermal Sunyaev-Zeldovich effect MH - USA MH - France MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 36 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221913200001 L2 - cosmic microwave background;cosmology : theory;SLOAN DIGITAL SKY; 3-DIMENSIONAL POWER SPECTRUM; COSMOLOGICAL CONSTANT SO - Monthly Notices of the Royal Astronomical Society 2004 ;350(3):L37-L41 10786 UI - 4184 AU - Fossas E AU - Ros RM AU - Sira-Ramirez H AD - Univ Politecn Catalunya, Dept Appl Math 4, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Inst Ind & Control Engn, E-08028 Barcelona, SpainIPN, CINVESTAV, Dept Elect Enginery, Mexico City 07300, DF, MexicoRos, RM, Univ Politecn Catalunya, Dept Appl Math 4, Jordi Girona 1-3,Modul C-3, ES-08034 Barcelona, Spain TI - Passivity-based control of a bioreactor system AB - This article deals with an example of advance control techniques applied to a biochemical system, the mathematical model and the constrains derived from the discrete implementation of a continuous control policy. The theory is developed on a simplified model of a bioreactor to be regulated and passivity-based control is used. The biological interpretation of the results derived from the mathematical model takes into account the time required for chemical processes in order to obtain cells and nutrients MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0259-9791 UR - ISI:000224428900003 L2 - bioreactor;nonlinear systems;passivity-based control;DISSIPATIVE DYNAMICAL-SYSTEMS; BATCH FERMENTATION PROCESSES; NONLINEAR-SYSTEMS; GLOBAL STABILIZATION; BIOLOGICAL REACTORS; FEEDBACK-SYSTEMS; INPUT-OUTPUT; STABILITY SO - Journal of Mathematical Chemistry 2004 ;36(4):347-360 10787 UI - 4408 AU - Fouladi-Nashta AA AU - Gutierrez CG AU - Russell HF AU - Garnsworthy PC AU - Webb R AD - Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, Leics, EnglandNatl Autonomous Univ Mexico, Fac Med Vet, Dept Reprod, Mexico City 04510, DF, Mexico TI - Effects of dietary fatty acids on oocyte quality and development in lactating dairy cows MH - United Kingdom MH - Mexico|Distrito Federal PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000222848400122 SO - Biology of Reproduction 2004 ;():107-107 10788 UI - 3783 AU - Fournier JM AU - Stamp P AU - Bolanos J AD - ETH, Inst Plant Sci, CH-8092 Zurich, SwitzerlandCIMMYT, Maize Programme, Mexico City 06600, DF, MexicoFournier, JM, Rue Mazerette 23, CH-1950 Sion, Switzerland TI - Prediction of maize grain yield using the chlorophyll meter technique in the Polochic Watershed of Guatemala AB - Growers of tropical maize (Zea mays L.) are often reluctant to invest in seeds and fertilizers because they are seeking to minimize risks. A chlorophyll meter measures leaf greenness, which non-destructively indicates the leaf N concentration. This may be an alternative to sampling N in the soil and to analyzing N in plant tissue, both of which are costly methods for estimating the N status of a crop at a certain growth stage. Thus, at earlier growth stages, the N status of a crop could be related to the final yield. At early growth stages of maize, the chlorophyll meter has been used successfully to predict the yield in many regions. In this study, a Minolta chlorophyll meter (type SPAD 502) was calibrated to distinguish between two maize varieties [Local Variety and HB-83 (a white hybrid)] and three fertilizer treatments [zero, recommended (89:13:24 N:P:K kg ha(-1)), and supra optimum (151:37:76)]. The meter was more useful at lower than at higher levels of fertilization, where SPAD readings as estimates of chlorophyll content appeared to reach a plateau. Both linear and quadratic relationships were observed between SPAD readings and maize grain yields. Central American farmers often apply low levels of fertilizers. If chlorophyll meter readings were to diagnose N deficiency accurately and inexpensively, fertilizers could be applied late in the season to counteract N deficiency. The chlorophyll meter should be calibrated for each variety in order to predict the yield with sufficient precision MH - Mexico|Distrito Federal MH - Switzerland PB - ST AUGUSTINE: TROPICAL AGRICULTURE RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0041-3216 UR - ISI:000202872800006 L2 - maize;grain yield prediction;N deficiency;minolta chlorophyll meter;linear and;quadratic relationships SO - Tropical Agriculture 2004 ;81(2):95-100 10789 UI - 3578 AU - Fracheboud Y AU - Jompuk C AU - Ribaut JM AU - Stamp P AU - Leipner J AD - Swiss Fed Inst Technol, Inst Plant Sci, Zurich, SwitzerlandCIMMYT, Mexico City 06600, DF, MexicoFracheboud, Y, Swiss Fed Inst Technol, Inst Plant Sci, Zurich, Switzerland TI - Genetic analysis of cold-tolerance of photosynthesis in maize AB - The genetic basis of cold-tolerance was investigated by analyzing the quantitative trait loci (QTL) of an F-2:3 population derived from a cross between two lines bred for contrasting cold-tolerance using chlorophyll fluorescence as a selection tool. Chlorophyll fluorescence parameters, CO2 exchange rate, leaf greenness, shoot dry matter and shoot nitrogen content were determined in plants grown under controlled conditions at 25/22degreesC or 15/13degreesC (day/night). The analysis revealed the presence of 18 and 19 QTLs ( LOD>3.5) significantly involved in the variation of nine target traits in plants grown at 25/22degreesC and 15/13degreesC, respectively. Only four QTLs were clearly identified in both temperatures regimes for the same traits, demonstrating that the genetic control of the performance of the photosynthetic apparatus differed, depending on the temperature regime. A major QTL for the cold-tolerance of photosynthesis was identified on chromosome 6. This QTL alone explained 37.4% of the phenotypic variance in the chronic photoinhibition at low temperature and was significantly involved in the expression of six other traits, including the rate of carbon fixation and shoot dry matter accumulation, indicating that the tolerance to photoinhibition is a key factor in the tolerance of maize to low growth temperature. An additional QTL on chromosomes 2 corresponded to a QTL identified previously in another population, suggesting some common genetic basis of the cold-tolerance of photosynthesis in different maize germplasms MH - Mexico|Distrito Federal MH - Switzerland PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0167-4412 UR - ISI:000225900500007 L2 - chilling-tolerance;chlorophyll fluorescence;chronic photoinhibition;QTL;ADP-GLUCOSE PYROPHOSPHORYLASE; QUANTITATIVE TRAIT LOCI; NITROGEN USE EFFICIENCY; LOW GROWTH TEMPERATURE; ZEA-MAYS L.; CHLOROPHYLL FLUORESCENCE; QUANTUM YIELD; CARBON ASSIMILATION; ELECTRON-TRANSPORT; PHOTOINHIBITION SO - Plant Molecular Biology 2004 ;56(2):241-253 10790 UI - 4998 AU - Frahm MA AU - Rosas JC AU - Mayek-Perez N AU - Lopez-Salinas E AU - costa-Gallegos JA AU - Kelly JD AD - Michigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAEAP Zamorano, Tegucigalpa, HondurasUniv Autonoma Aguascalientes, Dept Quim, Aguascalientes 20100, MexicoINIFAP Campo Expt Cotaxtla, Veracruz 91700, MexicoINIFAP Campo Expt Bajio, Celaya 38110, MexicoKelly, JD, Michigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824 USA TI - Breeding beans for resistance to terminal drought in the lowland tropics AB - In the lowland regions of Latin America, a large proportion of beans are sown at the beginning of a dry season where a guaranteed terminal (end-of-season) drought will reduce yields. This study was undertaken to identify lines within two black bean recombinant inbred line (RIL) populations with resistance to terminal drought. The two RIL populations were developed from crosses between a drought resistant line, B98311 from Michigan, with TLP 19 and VAX 5. two lines from CIAT with improved disease resistance and adaptation to growing conditions in Latin America. The RIL populations were evaluated in experiments conducted in Zamorano, Honduras and Veracruz, Mexico under drought stress and well-watered (non-stress) treatments. Yields were reduced in each experiment by drought and the fungal pathogen, Macrophomina phaseolina. Drought stress, disease pressure and low yields contributed to high coefficients of variation (CV), which made it difficult to select superior lines. Selection was based on rank of geometric mean (GM) yield calculated from the yield in the stress and non-stress treatments. One RIL L88-63, ranked first in GM yield at both locations. Subsequent testing in Honduras and Michigan confirmed the high yield potential and broad adaptation of L88-63. Breeding beans for drought resistance in lowland tropical environments should also include breeding for resistance to M. phaseolina MH - USA MH - Honduras MH - Mexico|Aguascalientes MH - Mexico|Guanajuato MH - Mexico|Veracruz PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000222558300011 L2 - geometric mean yield;Macrophomina phaseolina;Phaseolus vulgaris L.;terminal drought;MACROPHOMINA-PHASEOLINA; STRESS; YIELD; CULTIVARS; SELECTION; VULGARIS; PATHOGENESIS; INHERITANCE; MATURITY; TRAITS SO - Euphytica 2004 ;136(2):223-232 10791 UI - 4413 AU - Franchini M AU - Morossi C AU - Di Marcantonio P AU - Malagnini ML AU - Chavez M AU - Rodriguez-Merino L AD - Osserv Astron Trieste, INAF, I-34131 Trieste, ItalyUniv Trieste, Dipartimento Astron, I-34131 Trieste, ItalyInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoFranchini, M, Osserv Astron Trieste, INAF, Via GB Tiepolo, I-34131 Trieste, Italy TI - Synthetic lick indices and detection of alpha-enhanced stars. II. F, G, and K stars in the -1.0 <[Fe/H]<+0.50 range AB - We present an analysis of 402 F, G, and K solar neighborhood stars, with accurate estimates of [Fe/H] in the range -1.0 to +0.5 dex, aimed at the detection of alpha-enhanced stars and at the investigation of their kinematical properties. The analysis is based on the comparison of 571 sets of spectral indices in the Lick/IDS system, coming from four different observational data sets, with synthetic indices computed with solar-scaled abundances and with alpha-element enhancement. We use selected combinations of indices to single out alpha-enhanced stars without requiring previous knowledge of their main atmospheric parameters. By applying this approach to the total data set, we obtain a list of 60 bona fide alpha-enhanced stars and of 146 stars with solar-scaled abundances. The properties of the detected alpha-enhanced and solar-scaled abundance stars with respect to their [Fe/H] values and kinematics are presented. A clear kinematic distinction between solar-scaled and alpha-enhanced stars was found, although a one-to-one correspondence to "thin disk'' and "thick disk'' components cannot be supported with the present data MH - Italy MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224074400025 L2 - Galaxy : stellar content;stars : abundances;stars : kinematics;stars : late-type;IV-V STARS; SOLAR NEIGHBORHOOD; ARCHIVAL DATA; DWARF STARS; CATALOG; METALLICITY; ABUNDANCES; SAMPLE; DISK SO - Astrophysical Journal 2004 ;613(1):312-321 10792 UI - 6355 AU - Franchini M AU - Morossi C AU - Di Marcantonio P AU - Malagnini ML AU - Chavez M AU - Rodriguez-Merino L AD - Osserv Astron Trieste, INAF, I-34131 Trieste, ItalyUniv Trieste, Dipartimento Astron, I-34131 Trieste, ItalyInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoFranchini, M, Osserv Astron Trieste, INAF, Via GB Tiepolo 11, I-34131 Trieste, Italy TI - Synthetic lick indices and detection of alpha-enhanced stars AB - Synthetic Lick indices computed with solar scaled abundances and with alpha-element enhancement are presented and compared with predictions from both theoretical computations (Tripicco Bell; Thomas, Maraston, Bender; Barbuy et al.) and empirical fitting functions (de Freitas Pacheco). We propose selected combinations of indices capable of singling out alpha-enhanced stars without requiring previous knowledge of their main atmospheric parameters. By applying this approach to the 460 stars in the Worthey et al. catalog, we detected a list of 82 candidate alpha-enhanced stars. The confirmation of alpha-enhancement was obtained by searching the literature for individual element abundance determinations from high-resolution spectroscopy for a subsample of 34 stars. Preliminary discussion of the properties of the detected alpha-enhanced stars with respect to their [Fe/H] values and kinematics is presented MH - Italy MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188657600042 L2 - Galaxy : stellar content;stars : abundances;stars : late-type;OLD STELLAR POPULATIONS; FE ABSORPTION INDEXES; PLANET-HOST STARS; METAL-POOR STARS; ELLIPTIC GALAXIES; ABUNDANCE RATIOS; CHEMICAL ABUNDANCES; SOLAR NEIGHBORHOOD; LOCAL-DISTRIBUTION; GLOBULAR-CLUSTER SO - Astrophysical Journal 2004 ;601(1):485-499 10793 UI - 3087 AU - Franco-Gordo C AU - Godinez-Dominguez E AU - Filonov AE AU - Tereshchenko IE AU - Freire J AD - Univ Guadalajara, Ctr Ecol Costera, Guadalajara 48980, Jalisco, MexicoUniv Coruna, Dept Biol Anim Biol Vexetal & Ecol, La Coruna 15071, SpainUniv Guadalajara, CUCEI, Dept Fis, Guadalajara 44430, Jalisco, MexicoFranco-Gordo, C, Univ Guadalajara, Ctr Ecol Costera, Guadalajara 48980, Jalisco, Mexico TI - Plankton biomass and larval fish abundance prior to and during the El Nino period of 1997-1998 along the central Pacific coast of Mexico AB - The temporal and spatial distributions of zooplankton biomass and larval fish recorded during 27 months (December 1995-December 1998) off the Pacific coast of central Mexico are analyzed. A total of 316 samples were obtained by surface (from 40-68 to 0 in) oblique hauls at 12 sampling sites using a Bongo net. Two well-defined periods were observed: a pre-ENSO period (December 1995-march 1997) and an ENSO event (July 1997-September 1998) characterized by impoverishment of the pelagic habitat. The highest biomass concentrations occurred at coastal stations during the pre-ENSO period. During the El Nino period no spatial patterns were found in coastal waters. The months with highest biomass were those in which the lowest sea surface temperature (SST) occurred (January May), and this pattern was also observed during the ENSO period. A typical, although attenuated, seasonal environmental pattern with enhanced phytoplankton (diatoms and dinoflagellates) was prevalent during the El Nino event in nearshore waters. During the El Nino period the phytoplankton was mainly small diatoms (microphytoplankton), while dinoflagellates were practically absent. The most parsimonious generalized linear models explaining spatial and temporal distribution of larval fish species included the ENSO index (MEI), upwelling index (UI) and distance to the coast. The environmental variability defined on an interannual time-scale by the ENSO event and the seasonal hydroclimatic pattern defined by the UI (intra-annual-scale) controlled the ecosystem productivity patterns. The small-scale distribution patterns (defined by a cross-shore gradient) of plankton were related to the hydroclimatic seasonality and modulated by interannual anomalies. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Jalisco MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography U5 - J;Review AV - English IS - 0079-6611 UR - ISI:000227019700001 L2 - Mexican central Pacific;inshore phytoplankton;zooplankton;larval fish assemblages;El Nino;GULF-OF-CALIFORNIA; LONG-TERM CHANGES; COMMUNITY COMPOSITION; NORTHEAST PACIFIC; BIOLOGICAL CONSEQUENCES; INTERANNUAL VARIABILITY; DECADAL VARIABILITY; PELAGIC TUNICATES; BAJA-CALIFORNIA; SEASONAL SURVEY SO - Progress in Oceanography 2004 ;62(3):99-123 10794 UI - 5708 AU - Franco-Rivera A AU - Benintende G AU - Cozzi J AU - Baizabal-Aguirre VM AU - Valdez-Alarcon JJ AU - Lopez-Meza JE AD - Univ Michoacana San Nicholas Hidalgo, Ctr Multidisciplinario Estudios Biotecnol FMVZ, Morelia 58262, Michoacan, MexicoInst Nacl Tecnol Agropecuaria, Inst Microbiol & Zool Agr, RA-1712 Castelar, ArgentinaLopez-Meza, JE, Univ Michoacana San Nicholas Hidalgo, Ctr Multidisciplinario Estudios Biotecnol FMVZ, Km 9 5 Carretera Morelia Zinapecuaro,Apdo Postal, Morelia 58262, Michoacan, Mexico TI - Molecular characterization of Bacillus thuringiensis strains from Argentina AB - Bacillus thuringiensis INTA 7- 3, INTA 51-3, INTA Mo9-5 and INTA Mo14-4 strains were obtained from Argentina and characterized by determination of serotype, toxicity, plasmid composition, insecticidal gene content (cry and vip) and the cloning of the single-vip3A gene of the INTA Mo9-5 strain. The serotype analysis identified the serovars tohokuensis and darmstadiensis for the INTA 51-3 and INTA Mo14- 4 strains, respectively, whereas the INTA Mo9-5 strain was classified as "autoagglutinated". In contrast to the plasmid patterns of INTA 7- 3, INTA 51-3 and INTAMo9-5 (which were similar to B. thuringiensis HD-1 strain), strain INTA Mo14- 4 showed a unique plasmid array. PCR analysis of the four strains revealed the presence of cry genes and vip3A genes. Interestingly, it was found that B. thuringiensis 4Q7 strain, which is a plasmid cured strain, contained vip3A genes indicating the presence of these insecticidal genes in the chromosome. Bioassays towards various lepidopteran species revealed that B. thuringiensis INTA Mo9-5 and INTA 7- 3 strains were highly active. In particular, the mean LC50 obtained against A. gemmatalis larvae with the INTA Mo9-5 and INTA 7- 3 strains were 7 (5.7 - 8.6) and 6.7 (5.6-8.0) ppm, respectively. The INTA Mo14- 4 strain was non-toxic and strain INTA 51-3 showed only a weak larvicidal activity MH - Argentina MH - Mexico|Michoacan PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Microbiology U5 - J;Article AV - English IS - 0003-6072 UR - ISI:000220956700007 L2 - Bacillus thuringiensis;insecticidal genes;new strains;PESTICIDAL CRYSTAL PROTEINS; INSECTS; LARVAE; VIP3A SO - Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology 2004 ;86(1):87-92 10795 UI - 5812 AU - Frank A AU - Van Isacker P AU - Vargas CE AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoGrand Accelerateur Natl Ions Lourds, F-14076 Caen, FranceUV, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, MexicoFrank, A, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Evolving shape coexistence in the lead isotopes: The geometry of configuration mixing in nuclei AB - A matrix coherent-state approach is applied to the interacting boson model (IBM) with configuration mixing to describe the evolving geometry of neutron-deficient Pb isotopes. It is found that for small mixing with parameters determined previously, the potential energy surface of Pb-186 has three minima, which correspond to spherical, oblate, and prolate shapes, in agreement with recent measurements and mean-field calculations. Away from midshell, in the heavier Pb isotopes, no deformed minima occur. Our analysis suggests that the configuration-mixing IBM, used in conjunction with a matrix coherent-state method, may be a reliable tool for the study of geometric aspects of shape coexistence in nuclei MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Veracruz PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000220607200051 L2 - INTERACTING-BOSON MODEL; CLASSICAL LIMIT; STATES; REGION; PB-186; EVEN; PB; TRANSITIONS; SYMMETRIES; DECAY SO - Physical Review C 2004 ;69(3): 10796 UI - 6248 AU - Frank A AU - Van Isacker P AU - Gomez-Camacho J AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoGANIL, F-14076 Caen, FranceUniv Sevilla, Fac Fis, Dept Fis Atom Nucl & Mol, Seville, SpainFrank, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Probing additional dimensions in the universe with neutron experiments AB - We carry out a simple analysis of (n + 3)-dimensional gravity in the context of recent work on 'large' supplementary dimensions and deduce a formula for the expected compactification radius for the n additional dimensions in the universe, as a function of the Planck and the electro-weak scales. We argue that the correspondingly modified gravitational force gives rise to effects that might be within the detection range of dedicated neutron experiments. A scattering analysis of the corresponding modified gravitational forces suggests that slow neutron scattering off atomic nuclei with null spin may provide an experimental test for these ideas. (C) 2004 Published by Elsevier B.V MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000188793200003 L2 - MILLIMETER; HIERARCHY; SEARCH SO - Physics Letters B 2004 ;582(1-2):15-20 10797 UI - 6251 AU - Fransen C AU - Pietralla N AU - Linnemann A AU - Werner V AU - Bijker R AD - Univ Cologne, Inst Kernphys, D-50937 Cologne, GermanyYale Univ, Dept Phys, AW Wright Nucl Struct Lab, New Haven, CT 06520, USASUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoFransen, C, Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany TI - Low-spin gamma-ray spectroscopy of the (critical-point?) nucleus Ba-122 AB - The nucleus Ba-122 possesses an excitation energy ratio R-4/2=E(4(1)(+))/E(2(1)(+))=2.90 matching exactly the value predicted by the recently discussed X(5) solution of the Bohr-Hamiltonian. Besides the ground state band, other low-spin positive-parity bands of Ba-122 are unknown hampering detailed comparison to the theory. Excited low-spin states of Ba-122 have been studied by in-beam gammagamma-coincidence spectroscopy with the Sn-112(C-12,2n)Ba-122 reaction. A level structure was observed which we interpret as a part of the gamma band of Ba-122 MH - Germany MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000188747700022 L2 - POSSIBLE E(5) SYMMETRY SO - Physical Review C 2004 ;69(1): 10798 UI - 1899 AU - Franz C AU - Garza-Cazares F AU - Hernandez-Vidal G AU - Olivares-Saenz E AU - Fimbres-Durazo H AU - Lu CD AU - Kawas JR AD - Univ Autonoma Nuevo Leon, Fac Agron, Ctr Invest Agropecuarias, Monterrey 64930, NL, MexicoUniv Autonoma Nuevo Leon, Fac Med Vet & Zootecnia, Dept Nutr & Metab Anim, Monterrey 64930, MexicoUniv Hawaii, Off Vice Chanchellor Acad Affairs, Hilo, HI 96720, USAKawas, JR, Univ Autonoma Nuevo Leon, Fac Agron, Ctr Invest Agropecuarias, Monterrey 64930, NL, Mexico TI - Intake, digestibility and ruminal fermentation of ground and whole maize bran fed to American Alpine goats AB - A study was conducted to determine the effect of quantity and physical form of maize bran (CB) in diets of goats, on intake, digestibility and rumen fermentation. Sixteen male American Alpine goats weighing ca. 24 kg, were randomly assigned to four groups in a completely random design with a 2 x 2 factorial arrangement of treatments (two levels of CB, 15 and 30%; and two physical forms, whole and ground). Quantity and physical form of CB did not affect DM intake or digestibility. DM intake was 96.6 and 87.2 g/kg(0.75) for goats on the 15 and 30% CB diets, respectively. For treatments with whole and ground CB, intake was 93.4 and 90.4 g/kg(0.75), respectively. DM digestibility was 72.4 and 71.9% for 15 and 30% CB in the diet. Grinding CB did not improve digestibility (71.9% and 72.4%) for whole and ground CB, respectively. Time spent eating (min/day) was not affected by quantity or physical form of CB. Time spent ruminating was significantly greater for goats fed the 15% CB diets (397 min/day) than for those fed diets with 30% CB (338 min/day). Grinding of CB did not significantly change the time goats spent ruminating. Whereas total time spent masticating was significantly lower for 30% CB diets, no effect of grinding of CB was observed. As CB increased from 15 to 30%, total VFA production increased significantly from 85.5 to 112.1 mmoles/L. Increasing CB from 15 to 30% in the diet increased concentrations (mmoles/L) of acetate (from 55.7 to 72.6), propionate (from 19.9 to 26.1) and butyrate (from 85.5 to 112.1). Grinding CB had no effect on total volatile fatty acid production (101.7 vs. 95.9 for whole and ground, respectively). Molar percent propionate increased from 19.9 to 26.1 when CB increased from 15 to 30%. Molar percent of other VFA (acetate, 65.1 vs. 64.8; butyrate, 11.7 vs. 11.8) did not change. Grinding CB had no effect on VFA molar percent MH - Mexico|Nuevo Leon MH - USA PB - HATFIELD: SOUTH AFRICAN JOURNAL OF ANIMAL SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0375-1589 UR - ISI:000229975000018 L2 - alpine goats;maize bran;intake;digestibility;ruminal fermentation SO - South African Journal of Animal Science 2004 ;34():55-58 10799 UI - 6528 AU - Frauel Y AU - Tajahuerce E AU - Matoba O AU - Castro A AU - Javidi B AD - Univ Nacl Autonoma Mexico, IIMAS, Mexico City 01000, DF, MexicoUniv Jaume I, Dept Ciencias Expt, Castellon de La Plana 12080, SpainKobe Univ, Fac Engn, Dept Syst & Comp Engn, Nada Ku, Kobe, Hyogo 6578501, JapanInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269, USAFrauel, Y, Univ Nacl Autonoma Mexico, IIMAS, Apdo Postal 20-726 Admon 20,Del Alvaro Obregon, Mexico City 01000, DF, Mexico TI - Comparison of passive ranging integral imaging and active imaging digital holography for three-dimensional object recognition AB - We present an overview of three-dimensional (3D) object recognition techniques that use active sensing by interferometric imaging (digital holography) and passive sensing by integral imaging. We describe how each technique can be used to retrieve the depth information of a 3D scene and how this information can then be used for 3D object recognition. We explore various algorithms for 3D recognition such as nonlinear correlation and target distortion tolerance. We also provide a comparison of the advantages and disadvantages of the two techniques. (C) 2004 Optical Society of America MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 14 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000187998400026 L2 - CORRELATION FILTERS; TARGET; RECONSTRUCTION; IMAGES SO - Applied Optics 2004 ;43(2):452-462 10800 UI - 5021 AU - Frenal K AU - Xu CQ AU - Wolff N AU - Wecker K AU - Gurrola GB AU - Zhu SY AU - Chi CW AU - Possani LD AU - Tytgat J AU - Delepierre M AD - Inst Pasteur, URA 2185 CNRS, Unite RMN Biomol, F-75724 Paris 15, FranceChinese Acad Sci, Inst Biochem & Cell Biol, Key Lab Proteom, Shanghai, Peoples R ChinaNatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca, Morelos, MexicoUniv Louvain, Toxicol Lab, Louvain, BelgiumTongji Univ, Inst Prot Res, Shanghai 200092, Peoples R ChinaTytgat, J, Univ Louvain, Toxicol Lab, B-3000 Louvain, Belgium TI - Exploring structural features of the interaction between the scorpion ToxinCnErg1 and ERG K+ channels AB - The gamma-KTx-type scorpion toxins specific for K+ channels were found to interact with ERG channels on the turret region, while alpha-KTx3.2 Agitoxin-2 binds to the pore region of the Shaker K+ channel, and alpha-KTx5.3 BmP05 binds to the intermediate region of the small-conductance calcium-activated K-channel (SKCa). In order to explore the critical residues for gamma-KTx binding, we determined the NMR structure of native gamma-KTx1.1 (CnErg1), a 42 amino acid residues scorpion toxin isolated from the venom of the Mexican scorpion Centruroides noxius Hoffmann, and we used computational evolutionary trace (ET) analysis to predict possible structural and functional features of interacting surfaces. The H-1-NMR three-dimensional solution structure of native ergtoxin (CnErg1) was solved using a total of 452 distance constraints, 13 (3)J(NH-Halpha) and 10 hydrogen bonds. The structure is characterized by 2 segments of alpha-helices and a triple-stranded antiparallel beta-sheet stabilized by 4 disulfide bridges. The ET and structural analysis provided indication of the presence of two important amino acid residue clusters, one hydrophobic and the other hydrophilic, that should be involved in the surface contact between the toxin and the channel. Some features of the proposed interacting surface are discussed. (C) 2004 Wiley-Liss, Inc MH - Belgium MH - France MH - Mexico|Morelos MH - Peoples R China PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0887-3585 UR - ISI:000222403300017 L2 - ERG channel;ergtoxin;evolutionary trace analysis;NMR structure;scorpion toxin;EVOLUTIONARY TRACE ANALYSIS; POTASSIUM CHANNEL; FUNCTIONAL SITES; BINDING-SITE; TOXIN; SPECTROSCOPY; PROTEINS; ERGTOXIN; PEPTIDE; CENTRUROIDES SO - Proteins-Structure Function and Bioinformatics 2004 ;56(2):367-375 10801 UI - 6101 AU - Frey HM AU - Lange RA AU - Hall CM AU - gado-Granados H AD - Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109, USANatl Autonomous Univ Mexico, Inst Geofis, Coyoacan 04510, DF, MexicoFrey, HM, Univ Michigan, Dept Geol Sci, 1006 CC Little Bldg, Ann Arbor, MI 48109 USA TI - Magma eruption rates constrained by Ar-40/Ar-39 chronology and GIS for the Ceboruco-San Pedro volcanic field, western Mexico AB - Ar-40/Ar-39 geochronology is coupled with quantitative volume determinations (utilizing field mapping, digital elevation models, orthophotos, and geographic information system [GIS] software) to constrain magma eruption rates at the Ceboruco-San Pedro volcanic field (1600 km(2)) in the western Trans-Mexican arc. Ages are reported for 40 volcanic units, including Volcan Ceboruco (an active, andesitic stratovolcano), peripheral domes, shields, cinder cones, and fissure-fed flows. After a hiatus of similar to3 m.y., volcanic activity recommenced to produce 80.5 +/- 3.5 km(3) of magma at a rate of 63 m(3)/km(2) per year over the past 0.8 m.y. However, 75% of this volume erupted in the past 100 k.y., including the 51 +/- 2.5 km(3) of Volcan Ceboruco, equivalent to an eruption rate of similar to377 m(3)/km(2) per year. There have been at least two stages of cone-building activity at Volcan Ceboruco. The main edifice is composed of similar to38 km(3) Of precaldera andesites, the youngest dated at 45 +/- 8 ka. Their eruption was followed by a hiatus, interrupted by a Plinian eruption at I ka. The Plinian eruption and subsequent lava flows are andesite to dacite in composition and constitute similar to13 km(3) of the total volume of Volcan Ceboruco. Overall, the relative proportions of lava types erupted in the past 0.8 m.y. are 18%-19% basaltic andesite, 56%-60% andesite, 18%22% dacite, and 3% rhyolite. The peripheral lavas are each of small volume, geochemically diverse, and show little evidence of prior storage in an upper-crustal chamber. The eruptive sequence, proportions of lava types, phenocryst assemblages, textures, and geochemistry imply that the lavas do not reflect the differentiation of a single parental liquid in a long-lived magma chamber. The distinct geochemical signatures were present prior to magma emplacement in the upper crust, whereupon subsequent degassing and crystallization led to variable phenocryst abundances and assemblages MH - Mexico|Distrito Federal MH - USA PB - DENVER: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 18 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000189291600001 L2 - eruption rates;Ar-40/Ar-39 geochronology;GIS;magma evolution;Mexican volcanism;GEOMAGNETIC POLARITY REVERSAL; K-AR; NORTH-AMERICAN; CHILEAN ANDES; CINDER CONES; COCOS PLATES; TIME-SCALES; AGE; COMPLEX; PACIFIC SO - Geological Society of America Bulletin 2004 ;116(3-4):259-276 10802 UI - 5713 AU - Fridlind AM AU - Ackerman AS AU - Jensen EJ AU - Heymsfield AJ AU - Poellot MR AU - Stevens DE AU - Wang DH AU - Miloshevich LM AU - Baumgardner D AU - Lawson RP AU - Wilson JC AU - Flagan RC AU - Seinfeld JH AU - Jonsson HH AU - VanReken TM AU - Varutbangkul V AU - Rissman TA AD - NASA, Ames Res Ctr, Moffett Field, CA 94035, USANatl Ctr Atmospher Res, Boulder, CO 80307, USAUniv N Dakota, Dept Atmospher Sci, Grand Forks, ND 58202, USALawrence Livermore Natl Lab, Livermore, CA 94552, USAHampton Univ, Ctr Atmospher Sci, Hampton, VA 23681, USANASA, Langley Res Ctr, Hampton, VA 23681, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoStratton Pk Engn Co Inc, Boulder, CO 80301, USAUniv Denver, Dept Engn, Denver, CO 80208, USACALTECH, Dept Chem & Chem Engn, Pasadena, CA 91125, USACtr Interdisciplinary Remotely Piloted Aircraft S, Marina, CA 93933, USAFridlind, AM, NASA, Ames Res Ctr, Moffett Field, CA 94035, USA TI - Evidence for the predominance of mid-tropospheric aerosols as subtropical anvil cloud nuclei AB - NASA's recent Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment focused on anvil cirrus clouds, an important but poorly understood element of our climate system. The data obtained included the first comprehensive measurements of aerosols and cloud particles throughout the atmospheric column during the evolution of multiple deep convective storm systems. Coupling these new measurements with detailed cloud simulations that resolve the size distributions of aerosols and cloud particles, we found several lines of evidence indicating that most anvil crystals form on mid-tropospheric rather than boundary-layer aerosols. This result defies conventional wisdom and suggests that distant pollution sources may have a greater effect on anvil clouds than do local sources MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 23 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000221105300040 L2 - TROPICAL CUMULONIMBUS; CIRRUS CLOUDS; MODEL; SIZE; MICROPHYSICS; CONVECTION; POLLUTION; EVOLUTION; CLIMATE; RAIN SO - Science 2004 ;304(5671):718-722 10803 UI - 6506 AU - Fridman L AU - Strygin V AU - Polyakov A AD - Natl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoVoronezh State Univ, Dept Math Appl, Voronezh 394693, RussiaFridman, L, Natl Autonomous Univ Mexico, Ciudad Univ,AP 70-256, Mexico City 04510, DF, Mexico TI - Nonlocal stabilization via delayed relay control rejecting uncertainty in a time delay AB - Sufficient conditions for a robust relay delayed non-local stabilization of linear systems are found, which relate the upper bound of an uncertainty in a time delay and the maximum of the real part of system spectrum. Algorithm of delayed relay control gain adaptation for non-local stabilization is suggested. The proposed algorithm suppresses bounded uncertainties in the time delay: once this relay delayed control law for the upper bound of uncertainty in the time delay for given system is designed, we ensure non-local stabilization for all values of the time delay less than the upper bound even in the case of a variable delay. Copyright (C) 2003 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Russia PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000187965300002 L2 - input delay;relay control;semiglobal stability;uncertain systems;robust control;SLIDING MODE CONTROL; ROBUST STABILIZATION; CONTROL-SYSTEMS SO - International Journal of Robust and Nonlinear Control 2004 ;14(1):15-37 10804 UI - 4954 AU - Friton GM AU - Cajal C AU - Romero RR AU - Kleemann R AD - Boehringer Ingelheim Anim Hlth GmbH, Corp Mkt, D-55216 Ingelheim, GermanyBoehringer Ingelheim Vetmed SA, CV, Guadalajara, Jalisco, MexicoUniv Autonoma Nuevo Leon, Fac Med Vet & Zootecnia, Monterrey, MexicoBoehringer Ingelheim Vetmed GmbH, Ingelheim, GermanyFriton, GM, Boehringer Ingelheim Anim Hlth GmbH, Corp Mkt, D-55216 Ingelheim, Germany TI - Clinical efficacy of Meloxicam (Metacam (R)) and Flunixin (Finadyne (R)) as adjuncts to antibacterial treatment of respiratory disease in fattening cattle AB - The clinical efficacy of two non-steroidal anti-inflammatory drugs (NSAIDs), meloxicam (Metacam((R)) 20 mg/ml) and flunixin meglumine (Finadyne((R))), as adjuncts to antibacterial therapy in the treatment of acute febrile respiratory disease in cattle was compared. The randomised blind, positive controlled study was conducted under feedlot conditions in Mexico. Overall, 201 female cattle (weighing 220-250 kg) diagnosed with bronchopneumonia at the feedlot were recruited into the study. On Day 0 all animals were treated with 20 mg oxytetracycline/kg body-weight (Bivatop((R))200) by subcutaneous injection, in conjunction with either meloxicam (0.5 mg/kg subcutaneously, Metacam((R)) 20 mg/ml, n = 100), or flunixin meglumine (2.2 mg/kg intravenously, Finadyne((R)), n = 101). According to label instructions, meloxicam was administered as a single dose, whereas flunixin meglumine could be administered daily for up to 3 consecutive days depending on the rectal temperature (with re-administration, if rectal temperature greater than or equal to 40.0 degreesC). Rectal temperature, respiratory rate, appetite, dyspnoea, coughing, nasal discharge and general condition were recorded on Days 0 (prior to treatment), 1, 2, 3 and 7 using a weighted numerical score. Scores were summed to generate a 'Clinical Sum Score' (CSS, range 7 to 24 points). Individual animal body weights were measured on Days 0 and 7. Nasal swabs were collected from 10 animals per treatment group on Day 0 for microbiological culture. Clinical parameters and the mean CSS showed no significant differences between treatment groups with mean CSS on Days 0 and 7 of 16.18 and 10.55 in the meloxicam group and 16.41 and 10.88 in the flunixin meglumine group. However, a significantly lower mean rectal temperature was measured in the meloxicam group on Day 2 (p less than or equal to 0.01). No significant differences in mean body weights were found between groups. Repeated administration of flunixin meglumine was performed in 45% of the animals. No suspected adverse drug events related to treatments were reported. It is concluded that a single subcutaneous dose of meloxicam was as clinically effective as up to 3 consecutive daily intravenous doses of flunixin meglumine when used as an adjunctive therapy to antibacterial therapy in the treatment of acute febrile respiratory disease in feedlot cattle MH - Germany MH - Mexico|Jalisco MH - Mexico|Nuevo Leon PB - HANNOVER: SCHLUETERSCHE VERLAGSGESELLSCHAFT MBH & CO KG RP - NOT IN FILE U3 - TC 5 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-9366 UR - ISI:000222643600009 L2 - bovine respiratory disease (BRD);cattle;non-steroidal anti-inflammatory drug;meloxicam;NONSTEROIDAL ANTIINFLAMMATORY DRUGS; THERAPY; CALVES; PNEUMONIA; MEGLUMINE; IMMUNITY SO - Berliner und Munchener Tierarztliche Wochenschrift 2004 ;117(7-8):304-309 10805 UI - 4098 AU - Fritsch E AU - Gaillou E AU - Ostroumov M AU - Rondeau B AU - Devouard B AU - Barreau A AD - Inst Mat Jean Rouxel, IMN, Lab Phys Cristallie, F-44322 Nantes 3, FranceInst Mat Jean Rouxel, IMN, Ctr Microcaracterisat, F-44322 Nantes, FranceUFR Sci & Technol, Lab Planetol & Geodynam, F-4322 Nantes 3, FranceUniv Michoacan San Nicolas Hidalgo, Ciudad Univ, Morelia 58000, Michoacan, MexicoMuseum Natl Hist Nat, Lab Mineral, F-75005 Paris, FranceUniv Clermont Ferrand, CNRS, Lab Magmas & Volcans, OPGC, F-63038 Clermont Ferrand, FranceFritsch, E, Inst Mat Jean Rouxel, IMN, Lab Phys Cristallie, 2 Rue Houssineire,BP 32229, F-44322 Nantes 3, France TI - Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru AB - Translucent pink opals from Mexico (states of Mapimi and Michoacan) and Peru (Acari area, near Arequipa) are opal-CT, containing from 10 to 40% palygorskite, as demonstrated by XRD, infrared absorption and specific gravity measurements. Their nanostructure is unusual, with bunches of fibres 20 to 30 nm in minimum diameter, related to the fibrous nature of palygorskite crystals, as demonstrated by electron microscopy A complex absorption centred at about 500 nm is the cause of the pink colour. It is proposed that the absorption is due to quinone fossil products associated with the phyllosilicate fibres. The Raman spectrum of monoclinic palygorskite is deduced from that of its mixture with opal. The opal-CT-palygorskite-quinone association is a geological marker of a specific environment, presumably of a fossil lake environment in a volcanic region MH - France MH - Mexico|Michoacan PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 2 U4 - Mineralogy U5 - J;Article AV - English IS - 0935-1221 UR - ISI:000224571200004 L2 - opal;optical absorption;nanostructure;Raman;palygorskite;TEM;2 DIFFERENT SIZES; SILICA MINERALS; RAMAN-SPECTROSCOPY; CT; DIAGENESIS; SEDIMENTS; MICROCRYSTALLINE; PALYGORSKITE; ARRANGEMENTS; SPHERES SO - European Journal of Mineralogy 2004 ;16(5):743-751 10806 UI - 5620 AU - Fuchs B AU - Mielke EW AD - Astron Rech Inst, D-69120 Heidelberg, GermanyUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoFuchs, B, Astron Rech Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany TI - Scaling behaviour of a scalar field model of dark matter haloes AB - Galactic dark matter is modelled by a scalar field. In particular, it is shown that an analytically solvable toy model with a non-linear self-interaction potential U(Phi) leads to dark halo models which have the form of quasi-isothermal spheres. We argue that these fit the observed rotation curves of galaxies better than the centrally cusped haloes of standard cold dark matter. The scalar field model predicts a proportionality between the central densities of the dark haloes and the inverse of their core radii. We test this prediction successfully against a set of rotation curves of low-surface-brightness galaxies and nearby bright galaxies MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221095500030 L2 - galaxies : kinematics and dynamics;SURFACE BRIGHTNESS GALAXIES; RESOLUTION ROTATION CURVES; DENSITY PROFILE; DISKS SO - Monthly Notices of the Royal Astronomical Society 2004 ;350(2):707-709 10807 UI - 5852 AU - Fuentes-Carrera I AU - Rosado M AU - Amram P AU - Dultzin-Hacyan D AU - Cruz-Gonzalez I AU - Salo H AU - Laurikainen E AU - Bernal A AU - mbrocio-Cruz P AU - Le Coarer E AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoLab Astrophys Marseille, Marseille 4, FranceUniv Oulu, Dept Phys Sci, Div Astron, FIN-90570 Oulu, FinlandObserv Grenoble, F-38041 Grenoble 9, FranceFuentes-Carrera, I, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - The isolated interacting galaxy pair NGC 5426/27 (Arp 271) AB - We present Halpha observations of the isolated interacting galaxy pair NGC 5426/27 using the scanning Fabry-Perot interferometer PUMA. The velocity field, various kinematical parameters and rotation curve for each galaxy were derived. The FWHM map and the residual velocities map were also computed to study the role of non-circular motions of the gas. Most of these motions can be associated with the presence of spiral arms and structure such as central bars. We found a small bar-like structure in NGC 5426, a distorted velocity field for NGC 5427 and a bridge-like feature between both galaxies which seems to be associated with NGC 5426. Using the observed rotation curves, a range of possible masses was computed for each galaxy. These were compared with the orbital mass of the pair derived from the relative motion of the participants. The rotation curve of each galaxy was also used to fit different mass distribution models considering the most common theoretical dark halo models. An analysis of the interaction process is presented and a possible 3D scenario for this encounter is also suggested MH - Finland MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000188936100012 L2 - galaxies : interactions;galaxies : kinematics and dynamics;galaxies : spiral;galaxies : individual : NGC 5426;galaxies : individual : NGC 5427;TO-LIGHT RATIOS; N-BODY MODEL; SPIRAL GALAXIES; BINARY GALAXIES; DISK GALAXIES; SURFACE PHOTOMETRY; ROTATION CURVES; VELOCITY-FIELD; DYNAMICS; BARS SO - Astronomy & Astrophysics 2004 ;415(2):451-469 10808 UI - 906 AU - Fuentes-Romero L AU - Rodriguez-Diaz RA AU - Viveros-Rogel M AU - Bertagnolio S AU - Leon E AU - Ruiz-Palacios G AU - Sutherland D AU - Soto-Ramirez LE AD - Inst Nacl Ciencias Med & Nutr Salvator Zubiran, Mexico City, DF, MexicoWHO, HIV Dept, CH-1211 Geneva, SwitzerlandCENSIDA, Mexico City, DF, Mexico TI - Genotypic HIV-drug resistance among newly diagnosed, never treated persons in Mexico MH - Mexico|Distrito Federal MH - Switzerland PB - LONDON: INT MEDICAL PRESS LTD RP - NOT IN FILE U3 - TC 0 U4 - Infectious Diseases;Pharmacology & Pharmacy;Virology U5 - J;Meeting Abstract AV - English IS - 1359-6535 UR - ISI:000231615600124 SO - Antiviral Therapy 2004 ;9(4):U81-U82 10809 UI - 5830 AU - Fuentes AF AU - Boulahya K AU - Amador U AD - IPN, CINVESTAV, Coahuila 25000, MexicoUniv Complutense, Fac Ciencias Quim, Dept Quim Inorgan, Madrid 28040, SpainUniv San Pablo CEU, Fac Ciencias Expt & Salud, Dept Ciencias Quim, Madrid 28668, SpainAmador, U, IPN, CINVESTAV, Unidad Saltillo,Apto Postal 663, Coahuila 25000, Mexico TI - Novel rare-earth-containing manganites Ba4REMn3O12 (RE = Ce, Pr) with 12R structure AB - Novel rare-earth-containing manganites, Ba4REMn3O12 (RE-Ce, Pr), with 12R structure, have been prepared by solid-state reaction. Although the phases are formed at 950degreesC, to obtain single-phase samples high temperatures (up to 1300degreesC) and Iong synthesis periods are needed. Their structure is built Lip from chains of BO6 face-sharing and corner-sharing octahedra running along the c-axis giving a quasi-one-dimensional oxide. Every polyhedral column consists of (Mn3O12) units of three face-sharing octahedra, both ends connected by the three terminal oxygen atoms to three different (REO6) octahedra. Mixed occupation of the three octahedral positions in the structure, (Mn(1), Mn(2) and Re). was not found. Vacancies are not observed, neither in the cationic sublattice nor in the oxygen one. Thus, as in all the other 1-D manganites, the oxidation state of manganese ions seems to be four, as the rare-earth valence is. High-resolution electron microscopy suggests the eventual existence of ordered polytypes for different compositions, which could be stabilized by adjusting the thermodynamic conditions. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Coahuila MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000220513000013 L2 - manganites;1-D structure;rare-earth complex oxides;SAED;HREM;GIANT MAGNETORESISTANCE; OXIDE; SYSTEM; DIFFRACTION; MANGANATES SO - Journal of Solid State Chemistry 2004 ;177(3):714-720 10810 UI - 3266 AU - Fuentes O AU - Solorio T AU - Terlevich R AU - Terlevich E AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, Mexico. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England TI - Analysis of galactic spectra using active instance-based learning and domain knowledge AB - In this paper we present an efficient solution, based on active and instance-based machine learning, to the problem of analyzing galactic spectra, an important problem in modern cosmology. The input to the algorithm is the energy flux received from the galaxy; its expected output is the set of stellar populations and dust abundances that make up the galaxy. Our experiments show very accurate results using both noiseless and noisy spectra, and also that a further improvement in accuracy can be obtained when we incorporate prior knowledge obtained from human experts MH - United Kingdom MH - Mexico|Puebla T3 - ADVANCES IN ARTIFICIAL INTELLIGENCE - IBERAMIA 2004Lecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlefuentes@inaoep.mx thamy@inaoep.mx rjt@inaoep.mx eterlevi@inaoep.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBO40 AV - English IS - 0302-9743 UR - ISI:000226646200022 L2 - active learning;instance-based learning;locally-weighted regression;prior knowledge SO - 2004 ;():215-224 10811 UI - 5517 AU - Fuerte-Esquivel CR AU - Acha E AU - mbriz-Perez H AD - UMSNH, Div Estudios Posgrado, Fac Ingn Elect, Mexico City 58030, DF, MexicoUniv Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, ScotlandComis Fed Elect, Unidad Ingn Especializada Subdirecc Tecn, Dept Invest & Desarrollo Red, Mexico City 11590, DF, MexicoFuerte-Esquivel, CR, UMSNH, Div Estudios Posgrado, Fac Ingn Elect, Ciudad Univ Morelia, Mexico City 58030, DF, Mexico TI - A modular approach to IPC modelling for Newton-Raphson power flow studies AB - This paper introduces a modular approach for comprehensive inter-phase power controller (IPC) modelling in large-scale power flow studies. This technology falls within the realm of flexible AC transmission systems (FACTS) devices and concepts [IEEE Spectrum (1993) 40]. The basic working principles of the IPC and its applications have been studied quite extensively by the original proponents of the technology. Nevertheless, network-level studies have been confined to very contrived networks, and no interaction with other FACTS devices has been dealt with. One of the aims of this paper is to fill-in part of the vacuum that still exists on the accurate and flexible mathematical models, of this very promising technology, suitable for power flow analysis of practical power networks. The Newton-Raphson method is used to achieve very robust iterative solutions. The inclusion of the many IPC variables within the framework afforded by Newton's method does not dent the algorithm's quadratic convergence characteristics. The implementation of the IPC equations within the Jacobian and mismatch equations is described in detail. The versatility of the modelling approach and prowess of the algorithm are demonstrated by numeric examples. The IPC's power flow regulating capabilities are critically assessed and compared against better-known power flow series controllers. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0142-0615 UR - ISI:000221441900012 L2 - IPC;flexible AC transmission systems;power flows;Newton-Raphson;CONTROLLER TECHNOLOGY; NETWORKS; TRANSMISSION SO - International Journal of Electrical Power & Energy Systems 2004 ;26(7):549-557 10812 UI - 3918 AU - Fujita Y AU - Sarazin CL AU - Reiprich TH AU - Andernach H AU - Ehle M AU - Murgia M AU - Rudnick L AU - Slee OB AD - Natl Astron Observ, Tokyo 1818588, JapanGrad Univ Adv Studies, Dept Astron Sci, Tokyo 1818588, JapanUniv Virginia, Dept Astron, Charlottesville, VA 22903, USAUniv Guanajuato, Dept Astron, Guanajuato 36000, GTO, MexicoEuropean Space Agcy, XMM Newton Sci Operat Ctr, Madrid 28080, SpainCNR, Ist Radioastron, I-40129 Bologna, ItalyOsservatorio Astron Cagliari, I-09012 Capoterra, CA, ItalyUniv Minnesota, Dept Astron, Minneapolis, MN 55455, USACSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaFujita, Y, Natl Astron Observ, Osawa 2-21-1, Tokyo 1818588, Japan TI - XMM-Newton observations of A133: A weak shock passing through the cool core AB - We use XMM-Newton observations of the cluster of galaxies A133 to study the X-ray spectrum of the intracluster medium (ICM). We find a cold front to the southeast of the cluster core. From the pressure profile near the cold front, we derive an upper limit to the velocity of the core relative to the rest of the cluster of less than 230 km s(-1). Our previous Chandra image of A133 showed a complex, birdlike morphology in the cluster core. On the basis of the XMM-Newton spectra and hardness ratio maps, we argue that the wings of this structure are a weak shock front. The shock was probably formed outside the core of the cluster and may be heating the cluster core. Our Chandra image also showed a "tongue'' of relatively cool gas extending from the center of the cD galaxy to the center of the radio relic. The XMM-Newton results are consistent with the idea that the tongue is the gas that has been uplifted by a buoyant radio bubble including the radio relic to the northwest of the core. Alternatively, the tongue might result from a cluster merger. The small velocity of the core suggests that the bubble including the relic has been moved by buoyancy rather than by motions of the core or the ICM. We do not find clear evidence for nonthermal X-ray emission from the radio relic. On the basis of the upper limit on the inverse Compton emission, we derive a lower limit on the magnetic field in the relic of B greater than or equal to 1.5 muG MH - Australia MH - Italy MH - Japan MH - Mexico|Guanajuato MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225199500013 L2 - cooling flows;galaxies : clusters : general;galaxies : clusters : individual ( A133);intergalactic medium;radio continuum : galaxies;X-rays : galaxies : clusters;X-RAY; CHANDRA OBSERVATION; CLUSTER MERGERS; GALAXY CLUSTERS; PERSEUS CLUSTER; DARK-MATTER; FLOW; GAS; TEMPERATURE; TSUNAMIS SO - Astrophysical Journal 2004 ;616(1):157-168 10813 UI - 3703 AU - Fukuyama H AU - Terai S AU - Uchida M AU - Cano JL AU - Ancheyta J AD - Toyo Engn Corp, Technol Res Ctr, Chiba 29700017, JapanToyo Engn Corp, Overseas Business Dev & Mkt Div, Business Planning & Exploring Dept, Narashino, Chiba 2750024, JapanInst Mexicano Petr, Maya Crude Treatment Project, Mexico City 07730, DF, MexicoFukuyama, H, Toyo Engn Corp, Technol Res Ctr, 1818 Azafujimi, Chiba 29700017, Japan TI - Active carbon catalyst for heavy oil upgrading AB - The active carbon (AC) catalyst was studied by hydrocracking of Middle Eastern vacuum residue (VR) for heavy oil upgrading. It was observed that the active carbon has the affinity to heavy hydrocarbon compounds and adsorption selectivity to asphaltenes, and exhibits better ability to restrict the coke formation during the hydrocracking reaction of VR. The mesopore of active carbon was thought to play an important role for effective conversion of heavy hydrocarbon compounds into lighter fractions restricting carbon formation. The performance of the AC catalyst was exaimined by continuous hydrocracking by CSTR for the removal of such impurities as sulfur and heavy metals (nickel and vanadium), which are mostly concentrated in the asphaltenes. The AC catalyst was confirmed to be very effective for the removal of heavy metals from Middle Eastern VR, Maya/Istmo VR and Maya VR. The extruded AC catalysts were produced by industrial manufacturing method. The application test of the extruded AC catalyst for ebullating-bed reactor as one of the commercially applicable reactors was carried out at the ebullating-bed pilot plant for 500 h. The ebullition of the extruded AC catalyst was successfully traced and confirmed by existing gamma-ray density meter. The extruded AC catalyst showed stable performance with less sediment formation at an equivalent conversion by conventional alumina catalyst at commercial ebullating-bed unit. The degradation of the AC catalyst at the aging test was observed to be less than that of the conventional alumina catalyst. Thus, the AC catalyst was confirmed to be effective and suitable for upgrading of heavy oil, especially such heavy oils as Maya, which contains much heavy metals. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000225613500024 L2 - active carbon catalyst;vacuum residue;hydrocracking;HYDROCRACKING SO - Catalysis Today 2004 ;98(1-2):207-215 10814 UI - 5871 AU - Funes S AU - Reyes-Prieto A AU - Perez-Martinez X AU - Gonzalez-Halphen D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 045510, DF, MexicoUniv Munich, Inst Physiol Chem, D-81377 Munich, GermanyUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoCornell Univ, Dept Mol Biol & Genet, Ithaca, NY 14853, USAGonzalez-Halphen, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-243, Mexico City 045510, DF, Mexico TI - On the evolutionary origins of apicoplasts: revisiting the rhodophyte vs. chlorophyte controversy AB - Apicomplexans are parasites of great medical and veterinary importance. They contain a vestigial plastid, the apicoplast, that originated through the secondary endosymbiosis of a photosynthetic unicellular alga. The nature of this alga remains controversial. Here, we revisit the available evidence and critically summarize the "green vs. red" debate. (C) 2003 Elsevier SAS. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Immunology;Microbiology;Virology U5 - J;Review AV - English IS - 1286-4579 UR - ISI:000220392100008 L2 - apicoplast;apicomplexan parasites;rhodophyte ancestry;chlorophyte ancestry;evolution of plastids;PARASITE PLASMODIUM-FALCIPARUM; COMPLETE GENE MAP; PLASTID GENOME; DINOFLAGELLATE PLASTIDS; COMMON ORIGIN; SINGLE ORIGIN; PHYLOGENY; APICOMPLEXAN; EUKARYOTES; SUGGEST SO - Microbes and Infection 2004 ;6(3):305-311 10815 UI - 5987 AU - Furetta C AU - Kitis G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoAristotle Univ Thessaloniki, Nucl Phys Lab, GR-54006 Thessaloniki, GreeceFuretta, C, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Models in thermoluminescence AB - The aim of this paper is to give a review of the main models of thermoluminescence, from the most simple postulated by Randal and Wilkins in 1945. After that, a computer simulation emphasizes some problems relative to the use of the models to describe the behaviour of the thermoluminescent glow curve. Some suggestions are also given for obtaining a correct interpretation from the experimental data. (C) 2004 Kluwer Academic Publishers MH - Greece MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary U5 - J;Review AV - English IS - 0022-2461 UR - ISI:000220250700001 L2 - THERMALLY STIMULATED CONDUCTIVITY; IRRADIATED ALKALI HALIDES; KINETICS; CRYSTALS; LUMINESCENCE; 1ST; 2ND SO - Journal of Materials Science 2004 ;39(7):2277-2294 10816 UI - 4707 AU - gado-Escueta AV AU - Suzuki T AU - Alonso ME AU - Medina MT AU - Bai D AU - Bailey JN AU - Ochoa A AU - Prado AJ AU - Rasmussen A AU - Donnadieu FR AU - Daga A AU - Yamakawa K AD - Univ Calif Los Angeles, David Geffen Sch Med, Comprehens Epilepsy Program, Epilepsy Genet Genom Labs, Los Angeles, CA, USAVA GLAHS W Los Angeles Epilepsy Ctr Excellence, Los Angeles, CA, USARIKEN Brain Sci Inst, Neurogenet Lab, Saitama, JapanNatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoNatl Autonomous Univ, Tegucigalpa, HondurasUniv Padua, Fdn Telethon Inst, Dept Pharmacol, I-35100 Padua, ItalyDulbecco Telethon Inst, I-35100 Padua, Italy TI - The genetics of juvenile myoclonic epilepsy: where are we going? MH - Honduras MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000222019500087 SO - Epilepsia 2004 ;45():28-28 10817 UI - 4650 AU - Gaertner D AU - Dreyfus-Leon M AD - Inst Rech Dev, UR 109, CRHMT, F-34203 Sete, FranceUABC, Inst Nacl Pesca, PNAAPD, Fac Ciencias Marinas, Mexico City, DF, MexicoGaertner, D, Inst Rech Dev, UR 109, CRHMT, BP 171, F-34203 Sete, France TI - Analysis of non-linear relationships between catch per unit effort and abundance in a tuna purse-seine fishery simulated with artificial neural networks AB - A simulation study, combining grid- and individual-based approaches, was conducted to analyse the shape of the relationship between catch per unit effort (cpue) and abundance in a tuna purse-seine fishery. To understand the effect of fleet dynamics on the interpretation of cpue, the decision-making process used by fishers while searching for the resource is modelled with artificial neural networks. The cpue of fishers operating independently (i.e. individuals) vs. fishers sharing information (i.e. a code-group) is compared, accounting for different environmental scenarios. The results show that a power curve non-proportional relationship between cpue and abundance performs better than a linear relationship. As the shape parameter of the power curve for the code-group fishers was lower in every scenario than that of individual fishers, we conclude that hyperstability, a phenomenon commonly observed in schooling fisheries, is mainly attributable to information exchange among vessels. Setting the individual-level state variables of the virtual system at a specific spatial and temporal scale may affect the results of the simulations. (C) 2004 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1054-3139 UR - ISI:000223417800008 L2 - artificial neural networks;cpue-abundance relationship;fisher behaviour;information;sharing;tuna fishery;FACTORY TRAWLERS; FLEET DYNAMICS; MODEL; INFORMATION; BEHAVIOR; STOCK; CATCHABILITY; CPUE SO - Ices Journal of Marine Science 2004 ;61(5):812-820 10818 UI - 5419 AU - Galan SF AU - rroyo-Figueroa G AU - Diez FJ AU - Sucar LE AD - Univ Nacl Educ Distancia, Dept Artificial Intelligence, E-28040 Madrid, Spain. Inst Invest Elect, Cuernavaca, Morelos, Mexico. ITESM, Mexico City, DF, Mexico TI - Comparative evaluation of temporal nodes Bayesian networks and networks of probabilistic events in discrete time AB - Temporal Nodes Bayesian Networks (TNBNs) and Networks of Probabilistic Events in Discrete Time (NPEDTs) are two different types of Bayesian networks (BNs) for temporal reasoning. Arroyo-Figueroa and Sucar applied TNBNs to an industrial domain: the diagnosis and prediction of the temporal faults that may occur in the steam generator of a fossil power plant. We have recently developed an NPEDT for the same domain. In this paper, we present a comparative evaluation of these two systems. The results show that, in this domain, NPEDTs perform better than TNBNs. The ultimate reason for that seems to be the finer time granularity used in the NPEDT with respect to that of the TNBN. Since families of nodes in a TNBN interact through the general model, only a small number of states can be defined for each node; this limitation is overcome in an NPEDT through the use of temporal noisy gates MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Spain T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleseve@dia.uned.es garroyo@iie.org.mx fjdiez@dia.uned.es esucar@itesm.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600051 SO - 2004 ;():498-507 10819 UI - 3838 AU - Galea M AU - Leiva-Sanchez V AU - Paula GA AD - Univ Valparaiso, Dept Estadist, Valparaiso, ChileUniv Autonoma Agr Antonio Narro, Dept Estadist & Calculo, Saltillo, Coahuila, MexicoUniv Sao Paulo, Dept Estatist, BR-05508 Sao Paulo, BrazilGalea, M, Univ Valparaiso, Dept Estadist, Casilla 5030, Valparaiso, Chile TI - Influence diagnostics in log-Birnbaum-Saunders regression models AB - In this paper we present various diagnostic methods for a linear regression model under a logarithmic Birnbaum-Saunders distribution for the errors, which may be applied for accelerated lift testing or to compare the median lives of several populations. Some influence methods, such as the local influence, total local influence of an individual and generalized leverage are derived, analysed and discussed. We also present a connection between the local influence and generalized leverage methods. A discussion of the computation of the likelihood displacement as well as the normal curvature in the local influence method are presented. Finally, an example with real data is given for illustration MH - Brazil MH - Chile MH - Mexico|Coahuila PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0266-4763 UR - ISI:000225297400002 L2 - Birnbaum-Saunders distribution;life distributions;sinh-normal distribution;fatigue life;log-linear models;influence diagnostic;generalized leverage;local influence;maximum likelihood estimator;LOCAL INFLUENCE; LIFE DISTRIBUTIONS; LEVERAGE; FAMILY; FATIGUE SO - Journal of Applied Statistics 2004 ;31(9):1049-1064 10820 UI - 4377 AU - Galicia-Haro SN AU - Gelbukh A AU - Bolshakov IA AD - UNAM, Fac Sci, Mexico City, DF, MexicoNatl Polytech Inst, Ctr Res Comp, Mexico City, DF, MexicoChung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South KoreaGalicia-Haro, SN, UNAM, Fac Sci, Ciudad Univ, Mexico City, DF, Mexico TI - Identification of composite named entities in a Spanish textual database AB - Named entities (NE) mentioned in textual databases constitute an important part of their semantics. Lists of those NE are an important knowledge source for diverse tasks. We present a method for NE identification focused on composite proper names (names with coordinated constituents and names with several prepositional phrases.) We describe a method based on heterogeneous knowledge and simple resources, and the preliminary obtained results MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000223761800037 SO - Natural Language Processing and Information Systems 2004 ;3136():395-400 10821 UI - 5356 AU - Galicia-Haro SN AU - Gelbukh A AU - Bolshakov IA AD - UNAM, Fac Sci, Mexico City, DF, MexicoNatl Polytech Inst, Ctr Res Comp, Mexico City, DF, MexicoChung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South KoreaGalicia-Haro, SN, UNAM, Fac Sci, Ciudad Univ, Mexico City, DF, Mexico TI - Web-based sources for an annotated corpus building and composite proper name identification AB - Nowadays, collections of texts with annotations on several levels are useful resources. Huge efforts are required to develop this resource for languages like Spanish. In this work, we present the initial step, lexical level annotation, for the compilation of an annotated Mexican corpus using Web-based sources. We also describe a method based on heterogeneous knowledge and simple Web-based sources for the proper name identification required in such annotation. We focused our work on composite entities (names with coordinated constituents, names with several prepositional phrases, and names of songs, books, movies, etc.). The preliminary obtained results are presented MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000221807000012 SO - Advances in Web Intelligence, Proceedings 2004 ;3034():115-124 10822 UI - 5416 AU - Galicia-Haro SN AU - Gelbukh A AU - Bolshakov IA AD - UNAM, Fac Sci, Mexico City, DF, Mexico. Inst Politecn Nacl, Ctr Res Comp, Mexico City, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Recognition of named entities in Spanish texts AB - Proper name recognition is a subtask of Name Entity Recognition in Message Understanding Conference. For our corpus annotation proper name recognition is a crucial task since proper names appear approximately in more than 50% of total sentences of the electronic texts that we collected for such purpose. Our work is focused on composite proper names (names with coordinated constituents, names with several prepositional phrases, and names of songs, books, movies, etc.) We describe a method based on heterogeneous knowledge and simple resources, and the preliminary obtained results MH - Mexico|Distrito Federal MH - South Korea T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlesngh@fciencias.unam.mx gelbukh@cic.ipn.mx igor@cic.ipn.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600043 SO - 2004 ;():420-429 10823 UI - 4566 AU - Galina MA AU - Guerrero M AU - Puga CD AU - Haenlein GFW AD - FES Cuautitlan, Cuatitlan 54720, MexicoUNAM, Fac Estudios Super Cuautitlan, Cuautitlan 54000, MexicoMunicipio Marques Queretaro, Queretaro, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAGalina, MA, FES Cuautitlan, Teoloyucan Km 3-5, Cuatitlan 54720, Mexico TI - Effects of slow-intake urea. supplementation on goat kids pasturing natural Mexican rangeland AB - Eighty-six Alpine kids, 18.765 (+/-0.510) kg BW, plus four cannulated adult goats were allocated to two treatments in a production trial lasting 150 days. They also were evaluated for in situ DM disappearance, VDMI, OMI, rumen degradation rate of passage, NH3 and VFA concentrations, apparent digestibility, pH, total fermentable carbohydrates, and weight gains. The first diet (n = 43 kids, 19.120 (+/-0.700) kg BW plus two cannulated adult goats) were pastured daily on rangeland (RM) plus 200 g per day of a slow-intake urea supplement (SIUS) of previously established composition. A second group (n = 43 kids, 18.410 (+/-0.600) kg BW plus two cannulated adult goats) were equally pastured and supplemented with 300 g per day of a balanced concentrate (BC) with also previously established composition. Both groups were managed on pasture divided by an electrical fence. Kid growth averaged 101 (+/-18) g per day for RM/SIUS and 83 (+/-26) g per day for RM/BC (P < 0.05). Total DMI was 1010 +/- 293 g per day for RM/SIUS and 747 +/- 107 for RM/BC (P < 0.05). Ammonia concentration and degradation of potentially digestible and indigestible fractions were augmented by RM/SIUS (P < 0.05). Rumen pH rose slightly post-feeding for RM/SIUS goats and remained higher compared to RM/BC or RM 12 h after feed offer. Nitrogen intake was similar from RM/SIUS and RM/BC (118.60 g per day versus 122.53). In vivo N-digestibility was higher (P < 0.05) in the RM/SIUS diet (79.12%) than for RM/BC (56.14%); fiber digestibility was also higher (P < 0.05) for RM/SIUS. In situ DM disappearance did not show differences between diets at 9, 12, 24, 48, 72 and 92 h of incubation but was lower for RM. Digestion rate of NDF constant (k(d), h(-1)) favored the RM/SIUS diet (P < 0.05). Digestion rate for cellulose and hemicellulose was similar between diets. Passage rate (k(p), h(-1)) for NDF differed between diets, 0.059 h(-1) for RM/BC versus 0.680 h(-1) for RM/SIUS (P < 0.05). True digestibility was higher in RM/SIUS, 48.33% compared to RM/BC 34.11% (P < 0.05). In situ degradation of potentially digestible fiber for cellulose was higher in RM/SIUS 67.14% compared to RM/BC 53.14% (P < 0.05). Indigestible fiber was similar for RM/BC (51.42%) and RM/SIUS (66.27%). Time of disappearance of cellulose in RM/BC (17.54 h) was less (P < 0.05) than in RM/SIUS (30.34 h). Hemicellulose in situ digestion was similar between diets. Passage rate was different (P < 0.05) between RM/SIUS (0.080 h(-1)) and RM/BC (0.059 h(-1)). The half-time (t(1/2)) disappearance for hemicellulose was higher for RM/SIUS (31.14 h) as compared to RM/BC (22.14 h) (P < 0.05). Propionic acid increased with time of sampling in the RM/BC diet (P < 0.05). Butyric acid production did not differ between diets (P < 0.05). Total amounts of VFA differed between BC and SIUS diets, allowing higher energy to RM/SIUS (P < 0.05). Supplementation of high fiber diets with NPN did improve fermentation with better ammonia and VIA production. SIUS intake was consumed in 8-10h after offer but the BC in 30 min. It was concluded that SIUS supplementation offered critical nutrients to the rumen, improved DM intake, rate of passage, increased ruminal pH and resulted in better weight gains than BC. Present results showed that high fiber forages could be used efficiently by ruminants (up to 70-80% DMI) when ruminal fermentation is improved with a continuous N supplementation. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000223508700011 L2 - goats;growth;concentrate supplementation;rangeland pasture;urea supplementation;PROTEIN DEGRADABILITY; NONPROTEIN NITROGEN; RUMEN SO - Small Ruminant Research 2004 ;55(1-3):85-95 10824 UI - 5218 AU - Galina MA AU - Guerrero M AU - Puga C AU - Haenlein GFW AD - UNAM, FES, Mexico City 54000, DF, MexicoInst Nacl Ciencia Med & Nutr Salvador Zubiran, Dept Anim Nutr, Mexico City, DF, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAGalina, MA, UNAM, FES, Mexico City 54000, DF, Mexico TI - Effect of a slow-intake urea supplementation on growing kids fed corn stubble or alfalfa with a balanced concentrate AB - One hundred and sixty Alpine kids (16 kg BW) were studied for 150 days with two diets, evaluating in situ DM disappearance, VDMI, OMI, rumen degradation, rate of passage, ammonia (NH3) and volatile fatty acids (VFA) concentrations, apparent digestibility, pH, total fermentable carbohydrates (FC), and BW gains. Group 1, designated as CS/SIUS (n = 80 plus two cannulated goats) was offered corn stubble (CS) 800 g per day and alfalfa hay (AH) 100 g per day, with 150 g per day of a slow-intake urea supplement (SIUS) consisting of 16.5% molasses, 5% urea, 4% fishmeal, 2% limestone, 16% cottonseed meal, 17.5% rice polishing, 14.5% corn, 9.5% poultry litter, 4.1% commercial mineral salt, 0.9% orthophosphate, 2% ammonium sulfate, 1.5% cement kiln dust, and 6.5% animal lard. Group 2, designated as AH/BC (n = 80 plus two cannulated goats) were fed 550 g AH per day supplemented with 450 g of a balanced concentrate (BC) per day, consisting of 1.1% mineral salt, 1.2% orthophosphate, 40.0% corn, 25.9% wheat bran, 25.8% barley, and 6.0% soybean meal. VDMI and OMI were similar for 150 days for the two experimental diets fed to goats. NH3 concentration and degradation of potential non-degradable DM fractions were augmented by SIUS (P < 0.05). Rumen pH rose to 6.9 by 2 h after CS/SIUS was offered and stayed above 6.6 for 12 h, while the rumen pH in AH/BC goats decreased to 5.57 by 6 It and rose again to 6.50 after 12 h. N intake with CS/SIUS was 18.60 g per day versus 14.57 g per day with AH/BC (P < 0.05). In vivo N digestibililty was 76.63% in the CS/SIUS diet and 54.16% in AH/BC (P < 0.05). In vivo digestibility of NDF was greater for CS/SIUS (P < 0.05) (77.14% versus 65.11% for AH/BC). Degradation rate constant (k(d)) of NDF also favored the CS/SIUS diet (P < 0.05) and non-degradable fiber was less (P < 0.05) (35.18% versus 63.32% for AH/BC). Half-time (t(1/2), h) disappearance of cellulose and hemicellulose in the CS/SIUS diet were 29.34 and 29.14 compared to 16.54 and 20.16 in the AH/BC diet, respectively (P < 0.05) and passage rates differed similarly (P < 0.05). True digestibility of cellulose in CS/SIUS at 46.24% was higher (P < 0.5) than that of AH at 33.22%. Growth in 150 days averaged 112 +/- 23 g gain per day for CS/SIUS compared to 86 21 g per day for the AH/BC diet (P < 0.05). SIUS supplement intake per kg BW ranged from 6.57 to 3.12 g per day for the CS fed goats and 21.02 to 11.80 g per day for the AH/BC fed control goat kids (P < 0.05). Rumen NH3 was higher for CS/SIUS (12.3 mg per 100 ml versus 6.8 mg per 100 ml for AH/BC) (P < 0.01). Rumen acetic and butyric acids increased with the CS/SIUS diet (P < 0.05), while propionic acid was less and total VFA were not different. Supplementation of a high fiber diet with a slow-intake NPN supplement improved rumen fermentation. SIUS supplied critical nutrients to the rumen microflora, improved rate of passage, ruminal pH, NH3 contents, and resulted in higher weight gain than the AH/BC fed control goat kids. Results showed that high fiber forages like CS can be used efficiently by growing goats, when conditions for ruminal microorganisms are improved with a continuous slow-intake N supplementation. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000222003100005 L2 - goat kids;growth;non-protein N supplementation;rumen fermentation;corn stubble;PROTEIN DEGRADABILITY; NONPROTEIN NITROGEN; RUMEN; DIETS; FEEDS; DIGESTIBILITY; DIGESTION; CATTLE; STEERS; LEVEL SO - Small Ruminant Research 2004 ;53(1-2):29-38 10825 UI - 5219 AU - Galina MA AU - Hummel JD AU - Sanchez M AU - Haenlein GFW AD - UNAM, Dept Ciencias Pecuarias, FES Cuautitlan, Mexico City 54700, DF, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAUniv Colima, Fac Ciencias Quim, Mexico City, DF, MexicoGalina, MA, UNAM, Dept Ciencias Pecuarias, FES Cuautitlan, Km 3-5 Carretera Teoloyucan Cuautitlan,Estado Mex, Mexico City 54700, DF, Mexico TI - Fattening Rambouillet lambs with corn stubble or alfalfa, slow intake urea supplementation or balanced concentrate AB - One hundred and sixty Rambouillet lambs (15.925 +/- 0.350 kg/BW) were studied for 90 days with two treatments evaluating in situ DM disappearance, voluntary DM and OM intake, rumen degradation, rate of passage, NH3 and VIA concentrations, apparent digestibility, ruminal pH, total fermentable carbohydrates, and weight gains. The first diet (80 lambs plus two carmulated sheep) offered 1000 g corn stubble (CS) per day, 200 g alfalfa hay (AH) per day, and 200 g of a slow-intake urea supplement (SIUS) per day, consisting of 12.0% molasses, 5.0% urea, 4.0% fish meal, 3.0% salt, 2.5% orthophosphate, 3.2% limestone, 12.0% cottonseed meal, 12.0% rice polishing, 25.0% corn, 8.0% poultry litter, 1.5% mineral salts, 2.0% ammonium sulphate, 1.8% cement kiln dust, and 8.0% animal lard. The second group (80 lambs plus two carmulated sheep) was fed 800 g AH per day and 600 g of a 18% CP balanced concentrate (BC) per day. VDMI, OMI, DM digestibility and rumen NH3 concentrations were highest (P < 0.05) in CS/SIUS fed sheep. Rumen pH rose at 2 h with CS/SIUS and stayed above 6.4 for 12 h, while the pH in AH/BC fed sheep decreased to 5.6 by 4 h and rose to 6.2 after 12 h. N intake was 65.61 g per day with the CS/SIUS diet versus 28.93 for AH/BC (P < 0.05). In vivo N digestibility of CS/SIUS was 79.12% versus 56.14% for AH/BC (P < 0.05); OM, NDF, cellulose and hemicellulose in vivo digestibilities differed similarly. In situ DM disappearance differed also among diets at all hours of incubation, being slightly higher for CS/SIUS and significantly lower for CS. Digestion rate of NDF constant (k(d)) favored the CS/SIUS diet (P < 0.05), its passage rate (k(p), h(-1)) was 0.082 h(-1) for CS/SIUS (P < 0.05) versus 0.061 h(-1) for AH/BC (P < 0.05). True digestibility of NDF was 48.33% in the CS/SIUS diet compared to 34.11% for AH/BC (P < 0.05). In situ digestion rate (kd) for cellulose was 0.060 for CS/SIUS and 0.055 for AH/BC, but half-time disappearance of CS/SIUS was 30.34 h versus 17.54 h for AH/BC (P < 0.05). True digestibility of cellulose for CS/SIUS was 48.26% compared to 34.22% for AH/BC (P < 0.05). Indigestible fiber was 48.22% in the AH/BC diet compared to 32.93% for CS/SIUS (P < 0.05). Passage rate of hemicellulose was higher (0.034 h(-1)) for CS/SIUS and than for AH/BC (0.029 h(-1)) (P < 0.05). Half-time disappearance of hemicellulose was 31.14 h for CS/SIUS versus 22.14 h for AH/BC (P < 0.05). The CS/SIUS diet was consumed in 8-10 h, while the AH/C diet took only 30 min. Weight gain was 351 g per day (+/-46) for CS/SIUS compared to 315 g per day (+/-58) for the AH/BC diet (P < 0.05). Rumen acetic acid production increased in CS/SIUS compared to the AH/BC diet (P < 0.05), while propionic acid was reversed (P < 0.05). Results showed that high fiber forages, such as CS can be used efficiently by lambs, when ruminal conditions are improved with a non-protein N (NPN) slow-intake supplementation. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000222003100012 L2 - lambs;growth;non-protein N supplementation;rumen fermentation;corn stubble;PROTEIN DEGRADABILITY; NONPROTEIN NITROGEN; BARLEY STRAW; RUMEN; DIETS; DIGESTIBILITY; CATTLE; SHEEP; FEEDS; IMPROVEMENT SO - Small Ruminant Research 2004 ;53(1-2):89-98 10826 UI - 5834 AU - Gallardo LA AU - Meju MA AD - Univ Lancaster, Dept Environm Sci, Lancaster LA1 4YQ, EnglandCtr Invest Cient & Educ Super Ensenada, Div Ciencias Tierra, Mexico City, DF, MexicoGallardo, LA, Univ Lancaster, Dept Environm Sci, Lancaster LA1 4YQ, England TI - Joint two-dimensional DC resistivity and seismic travel time inversion with cross-gradients constraints AB - [1] It is now common practice to perform collocated DC resistivity and seismic refraction surveys that complement each other in the search for more accurate characterization of the subsurface. Although conventional separate DC resistivity and seismic models can be diagnostic, we posit that better results can be derived from jointly estimated models. We make the assumption that both methods must be sensing the same underlying geology and have developed an innovative resistivity-velocity cross-gradients relationship to evaluate the structural features common to both methods. The cross-gradients function is incorporated as a constraint in a nonlinear least squares problem formulation, which is solved using the Lagrange multiplier method. The resultant iterative two-dimensional (2-D) joint inversion scheme is successfully applied to synthetic data ( serving as validation tests here) and to field data from collocated DC resistivity and seismic refraction profiling experiments and also compared to conventional separate inversion results. The joint inversion results are shown to be superior to those from separate 2-D inversions of the respective data sets, since our algorithm leads to resistivity and velocity models with remarkable structural agreement MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 11 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000220625000004 L2 - joint inversion;DC resistivity;seismic refraction;NEAR-SURFACE MATERIALS; TOMOGRAPHY SO - Journal of Geophysical Research-Solid Earth 2004 ;109(B3): 10827 UI - 4295 AU - Gallego E AU - Lorente A AU - Vega-Carrillo HR AD - Univ Politecn Madrid, Dept Nucl Engn, E-28006 Madrid, SpainUniv Autonoma Zacatecas, UAs Estudios Nucl, Zacatecas 98000, MexicoGallego, E, Univ Politecn Madrid, Dept Nucl Engn, C Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Characteristics of the neutron field of the facility at DIN-UPM AB - A new source facility (Am-241-Be) has been installed in a bunker-type room of large dimensions. To characterise the neutron fields in the facility, detailed calculations have been made with MCNP-4C, showing the different components of the neutron radiation reaching the reference points (direct, inscattered, backscattered). The contribution from neutrons scattered in the walls to the total ambient dose equivalent remains reasonably low (<10%) in the reference points. Additionally, spectra measurements have been performed with a Bonner spheres spectrometer with a (LiI)-Li-6(Eu) scintillator (0.4 circle divide x 0.4 cm(2)), UTA4 response matrix and BUNKIUT unfolding code. The calculated and experimentally obtained spectra are compared, with small differences found in the epithermal and thermal region, attributable to the concrete composition used in the calculations. The H*(10) rate has been determined from the spectra, and then compared to the reading of an active dosemeter (LB6411), with differences found lower than 8% MH - Mexico|Zacatecas MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0144-8420 UR - ISI:000224058000012 L2 - SPECTRA SO - Radiation Protection Dosimetry 2004 ;110(1-4):73-79 10828 UI - 4077 AU - Gallegos-Orozco JF AU - Vargas HE AU - Rakela J AD - Mayo Clin Scottsdale, Div Transplantat Med, Scottsdale, AZ, USAInst Nacl Ciancias Med & Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City, DF, MexicoMayo Clin Scottsdale, Dept Internal Med, Scottsdale, AZ, USAVargas, HE, Mayo Clin Scottsdale, Div Transplantat Med, Scottsdale, AZ USA TI - Virologically compromised donor grafts in liver transplantation MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Review AV - English IS - 0168-8278 UR - ISI:000224669700001 L2 - HEPATITIS-B-VIRUS; ANTIBODY-POSITIVE DONORS; CORE ANTIBODY; C VIRUS; DE-NOVO; ORGAN-TRANSPLANTATION; ALLOGRAFT RECIPIENTS; INFECTED PATIENTS; VIRAL-HEPATITIS; SURFACE-ANTIGEN SO - Journal of Hepatology 2004 ;41(4):512-521 10829 UI - 5546 AU - Gallegos A AU - Lucio JL AU - Pestieau J AD - Univ Guanajuato, Inst Fis, Guanajuato 37150, MexicoUniv Catholique Louvain, Inst Phys Theor, B-1348 Louvain, BelgiumICTP, Trieste, ItalyGallegos, A, Univ Guanajuato, Inst Fis, Lomas Bosque 103, Guanajuato 37150, Mexico TI - pi pi invariant mass spectrum in V-'-> V pi pi and the f(0)(600) pole AB - We consider the phenomenological description of the two pion invariant mass spectrum in the V'-->Vpipi decays. We study the parametrization of the amplitude involving both S and D wave contributions. From a fit to the two pion decays of the Y(nS) and Psi(nS) we determine the f(0)(600) mass and width to be m(f0)=528+/-32 MeV and Gamma(f0)=413+/-45 MeV. The mass and width values we report correspond, respectively, to the real and imaginary part of the S matrix pole MH - Belgium MH - Italy MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000221253900051 L2 - EXCITED HEAVY QUARKONIA; HADRONIC TRANSITIONS; SIGMA-MESON; DECAY; F(0)(980); MODEL; PI(0)PI(0)GAMMA; SCATTERING; SYMMETRY; STATES SO - Physical Review D 2004 ;69(7): 10830 UI - 5217 AU - Gallipoli MR AU - Mucciarelli M AU - Castro RR AU - Monachesi G AU - Contri P AD - CICESE, Div Ciencias Tierra, Ensenada 22860, Baja California, MexicoINGV, I-00143 Rome, ItalyIAEA, Vienna, AustriaCNR, IMAA, I-85050 Tito, PZ, ItalyUniv Basilicata, DiSGG, I-85100 Potenza, ItalyCastro, RR, CICESE, Div Ciencias Tierra, Km 107 Carret, Ensenada 22860, Baja California, Mexico TI - Structure, soil-structure response and effects of damage based on observations of horizontal-to-vertical spectral ratios of microtremors AB - The microtremor horizontal-to-vertical-spectral-ratio (HVSR) technique is widely used in the urban environment to assess the fundamental frequency response of the ground. Extensive literature exists about case histories using HVSR for microzonation in several cities, but no systematic studies have been devoted to check the presence of soil-structure interaction effects, and even less attention to study building behaviour after earthquake damage. To evaluate the above-mentioned effects, a series of experiments are reported in this article. We first made a series of microtremor measurements on buildings and civil structures to evaluate the reliability of fundamental frequency determinations. Then, we considered several case studies to evaluate the effect of soil-structure interaction in estimates of site response in the presence of tall buildings. Finally, an experiment on the frequency change due to damage was performed. It was possible to confirm that HVSR is able to detect building fundamental modes and once known the building frequency, it is also possible to detect the presence of soil-structure interaction. Thus, once the presence of the building natural frequency is identified, it is possible to infer the site response from free field measurements. We also found that the HVSR technique is equally useful for detecting structural damage by determining the frequency shift of the buildings. (C) 2004 Elsevier Ltd. All rights reserved MH - Austria MH - Italy MH - Mexico|Baja California PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0267-7261 UR - ISI:000222003400006 L2 - soil response;soil-structure interaction;structure response;microtremors;NUMERICAL-ANALYSIS; MEXICO-CITY; BUILDINGS; MOTIONS; TESTS SO - Soil Dynamics and Earthquake Engineering 2004 ;24(6):487-495 10831 UI - 4531 AU - Gallon C AU - Tessier A AU - Gobeil C AU - La Torre MCAD AD - Univ Quebec, INRS, ETE, St Foy, PQ G1V 4C7, CanadaUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi, SLP, MexicoTessier, A, Univ Quebec, INRS, ETE, St Foy, PQ G1V 4C7, Canada TI - Modeling diagenesis of lead in sediments of a Canadian Shield lake AB - Triplicate porewater lead concentration profiles were determined on six occasions in a Canadian Shield lake. Total Pb concentrations were also measured in a dated core obtained at the same site. This information, as well as an extensive dataset comprising ancillary geochemical measurements on porewaters and sediment and the population densities of benthic animals, is used in a one-dimensional transport-reaction diagenetic model to investigate the transport and mobilization of Pb in these sediments. Application of the model consistently indicates the presence of a zone of Pb production to the porewaters that lies above a zone of Pb consumption. The profiles of various porewater constituents and thermodynamic calculations indicate that Pb is mobilized in the zone of production by the reductive dissolution of iron oxyhydroxides, whereas it is removed in the zone of consumption by precipitation as a solid sulfide. Rate constants are estimated for reductive iron dissolution (k(d)(Fe(III)) = 2.0 +/- 0.5 x 10(-1) cm(3) Mol(-1) s(-1)), Pb adsorption on iron oxyhydroxides (k(ads)(Pb) = 98 +/- 55 cm(3) Mol(-1) s(-1)), and Pb precipitation (k(ppt)(Pb) = 8 x 10(-20) Mol cm(-3) s(-1) to 16 +/- 13 x 10(-22) mol cm(-3) s(-1), depending on the solubility product assumed for the precipitation of PbS). According to model calculations, diagenetic processes, such as remobilization, molecular diffusion, bioturbation, and bioirrigation have a negligible influence on the solid phase Pb profile. In agreement with this finding, the present-day fluxes of dissolved Pb by diffusion (J(D)(Pb) = -6.5 x 10(-11) mol cm(-2) yr(-1)), bioturbation (J(B)(Pb) = -1.1 x 10(-13) Mol cm(-2) yr(-1)), and bioirrigation (J(I)(Pb) 1.5 x 10(-1)1 Mol cm(-2) yr(-1)) are small compared to the flux of Pb deposited with settling particles (J(S)(Pb) 5.3 x 10(-9) Mol cm(-2) yr(-1)). Copyright (C) 2004 Elsevier Ltd MH - Canada MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-7037 UR - ISI:000223593700008 L2 - WATER INFAUNAL BIOIRRIGATORS; TRACE-ELEMENTS; PORE-WATER; OLIGOTROPHIC LAKE; METAL-DEPOSITION; HUMIC SUBSTANCES; ADIRONDACK LAKE; MEROMICTIC LAKE; NATURAL-WATERS; ORGANIC-MATTER SO - Geochimica et Cosmochimica Acta 2004 ;68(17):3531-3545 10832 UI - 5921 AU - Galvan DH AU - Li S AU - Yuhasz WM AU - Kim JH AU - Maple MB AU - Adem E AD - Univ Calif San Diego, Dept Phys, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093, USAElect & Telecommun Res Inst, Basic Res Lab, Taejon 305350, South KoreaUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoGalvan, DH, UNAM, Ctr Ciencias Mat Condensada, Dept Chem Phys, Km 107,Carretera Tij Ensenada, Ensenada 22800, Baja California, Mexico TI - Nondestructive interactions of carbon nanotubes with Bi2Sr2CaCu2O8 AB - Experimental evidence is presented for the intercalation of carbon nanotubes (CNs) in polycrystalline Bi2Sr2CaCu2O8 (BSCCO) samples at the 12 wt.%-CN doping level, based on high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction measurements. Magnetization measurements performed on BSCCO samples with various CN doping levels do not indicate a change in the critical current density J(c) within experimental error. The embedding process did not have any detrimental effects on the superconducting critical temperature of any of the samples. In contrast to previous work, the temperatures and widths of the superconducting transition of all the samples were similar. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000220316500006 L2 - superconductivity;wetting;nanotubes;CRITICAL-CURRENT DENSITY; COLUMNAR DEFECTS; SUPERCONDUCTORS; MICROSTRUCTURE; MAGNETIZATION; IRRADIATION; SYSTEM SO - Physica C-Superconductivity and Its Applications 2004 ;403(3):145-150 10833 UI - 6222 AU - Galvez-Ruiz JC AU - Guadarrama-Perez C AU - Noth H AU - Flores-Parra A AD - IPN, Dept Chem, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyFlores-Parra, A, IPN, Dept Chem, Ctr Invest & Estudios Avanzados, AP 14-740, Mexico City, DF, Mexico TI - Group 13 complexes of 5-methyl-1,3,5-dithiazinane AB - The synthesis of mono-N adducts of 5-methyl-1,3,5-dithiazinane (1) with Al(CH3)(3), Al(CH3)(2)Cl, AlCl3, AlBr3 (5-8), a bis-N adduct with InCl3 (9), and the corresponding dithiazinanium salts with the anions AlBr4-, AlCl4-, GaCl4- and BCl4- (10-14) are reported. Compounds 5-7 adopt a preferred conformation in solution at room temperature and 8 at -10 degreesC. DeltaG(not equal) values for the ring inversion were calculated for 5-8. Compounds 6-14 were studied by single-crystal X-ray diffraction. The solution and solid-state analyses showed that the rings are present in all cases in a chair conformation. In compounds 5-8 the tetrahedral aluminum atom is found in an equatorial position. In the indium compound 9 the metal atom has a tbp geometry. For dithiazinanium rings 10-14 dipolar intra- and intermolecular interactions between halogen atoms and C-H and N-H are reported. Two different conformations for the N-CH3 were found in compound 14. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) MH - Germany MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000189002500022 L2 - aluminum;halides;indium;conformational analysis;X-RAY-DIFFRACTION; CENTER-DOT-O; M-N BONDS; CRYSTAL-STRUCTURE; HYDROGEN-BONDS; CHLOROBORANE ADDUCTS; HALOGEN INTERACTIONS; ORGANIC METALS; C-H...O; BORANE SO - European Journal of Inorganic Chemistry 2004 ;(3):601-611 10834 UI - 6035 AU - gama-Acevedo E AU - Rendon-Villalobos R AU - Tovar J AU - Paredes-Lopez O AU - Islas-Hernandez JJ AU - Bello-Perez LA AD - IPN, Ctr Desarrollo Prod Biot, Yautepec, Morelos, MexicoCent Univ Venezuela, Inst Expt Biol, Fac Ciencias, Caracas, VenezuelaIPN, Ctr Invest & Estudios Avanzados, Guanajuato, MexicoBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, Yautepec, Morelos, Mexico TI - In vitro starch digestibility changes during storage of maize flour tortillas AB - Nixtamalized maize flours elaborated by four factories in Mexico were used for tortilla preparation. Samples were stored at 4 degreesC for up to 72 h and their in vitro starch digestibility features were evaluated. Moisture content was different between flour and tortilla but no evident relation could be established. Protein and lipid levels were lower in tortillas than in flour but ash content was not different in both samples. A decrease in available starch content was observed upon 48 h cold storage (4degreesC), changes that were concomitant with increased total resistant starch (RS) levels. These changes were due mainly to retrogradation, as suggested by the increased retrograded resistant starch (RRS) levels recorded in stored tortillas; in some samples, RRS represented up to 100% of total RS. The digestion (alpha-amylolysis) rate (DR) of freshly prepared tortillas differed for the various samples. Although the amylolysis patterns for fresh and 72 h-stored tortillas were similar, lower DR values were shown for the stored materials. The differences found among the various tortilla samples may be due to variations in processing conditions during commercial maize flour preparation, and to the use of different maize varieties MH - Mexico|Guanajuato MH - Mexico|Morelos MH - Venezuela PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0027-769X UR - ISI:000220084700007 L2 - maize;nixtarnalization;resistant starch;starch digestibility;tortillas;RESISTANT STARCH; CORN; FRACTIONS; DIGESTION; FOODS; MASA SO - Nahrung-Food 2004 ;48(1):38-42 10835 UI - 4755 AU - Gamboa-Dominguez A AU - Dominguez-Fonseca C AU - Quintanilla-Martinez L AU - Reyes-Gutierrez E AU - Green D AU - ngeles-Angeles A AU - Busch R AU - Hermannstadter C AU - Nahrig J AU - Becker KF AU - Becker I AU - Hofler H AU - Fend F AU - Luber B AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Pathol, Mexico City, DF, MexicoGSF Forschungszentrum Umwelt & Gesundheit, Inst Pathol, Neuherberg, GermanyInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Oncol, Mexico City, DF, MexicoTech Univ Munich, Klinikum Rechts Isar, Inst Med Stat & Epidemiol, D-8000 Munich, GermanyTech Univ Munich, Klinikum Rechts Isar, Inst Allgemeine Pathol & Pathol Anat, D-8000 Munich, GermanyLuber, B, Trogerstr 18, D-81675 Munich, Germany TI - Epidermal growth factor receptor expression correlates with poor survival in gastric adenocarcinoma from Mexican patients: a multivariate analysis using a standardized immunlohistochemical detection system AB - The aim of the study was to determine epidermal growth factor receptor (EGFR) expression in gastric adenocarcinoma by standardized immunohistochemistry and to correlate EGFR expression with clinical features and patient survival. EGFR expression was investigated in paraffin sections of resection specimens of 89 gastric carcinomas from Mexican Mestizo patients using standardized immunohistochemistry with antigen retrieval (Dako EGFRpharmDX(TM) assay detection system). Membrane staining of EGFR was evaluated in the neoplastic cells and graded using a semiquantitative score (0-3 +). Of the 89 carcinomas examined, staining of neoplastic cells was weak in 17 (19.1%, score 1 +), moderate in 16 (18.0%, score 2 +), and strong in nine cases (10.1%, score 3+). EGFR reactivity was heterogeneous, frequently showing completely negative up to 3+ positive areas within an individual tumor. EGFR reactivity score correlated with distant metastases (P=0.002) and clinical stage (P=0.033). EGFR score 0/1 + was significantly associated with an increase in patient survival when compared to score 2 + /3 + (P=0.0006). In a multivariate analysis, EGFR positive cells in muscularis or subserosa (P=0.004), distant metastases (P=0.016) and residual disease (P=0.039) were significantly correlated with decreased survival. The prognosis was associated with the EGFR reactivity score (P=0.003), distant metastases (P=0.0001) and residual disease (P=0.012) in a univariate analysis. EGFR reactivity in neoplastic cells is an independent prognostic factor in gastric adenocarcinoma. The relevance of the heterogeneity in EGFR expression with regard to tumor progression, metastasis and anti-EGFR therapy needs to be studied MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 12 U4 - Pathology U5 - J;Article AV - English IS - 0893-3952 UR - ISI:000223118000014 L2 - epidermal growth factor receptor (EGFR);EGFR reactivity score;anti-EGFR therapy;INTESTINAL-TYPE; CANCER-THERAPY; EGF RECEPTOR; FACTOR-ALPHA; CARCINOMA; TARGET; AMPLIFICATION; PROGNOSIS; C-ERBB-2; FAMILY SO - Modern Pathology 2004 ;17(5):579-587 10836 UI - 5139 AU - Gamez S AU - Ramirez JA AU - Garrote G AU - Vazquez MV AD - Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Tamaulipas 88700, MexicoUniv Vigo, Dept Enxeneria Quim, Fac Ciencias, Orense 32004, SpainUniv Santiago de Compostela, Area Tecnol Alimentos, Dept Quim Analit, Escuela Politecn Super, Lugo 27002, SpainVazquez, MV, Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Apartado Postal 1015, Tamaulipas 88700, Mexico TI - Manufacture of fermentable sugar solutions from sugar cane bagasse hydrolyzed with phosphoric acid at atmospheric pressure AB - Sugar cane bagasse, a renewable and cheap bioresource, was hydrolyzed at 100 degreesC using phosphoric acid at different concentrations (2, 4, or 6%) and reaction times (0-300 min) to obtain fermentable sugar solutions, which have a high concentration of sugars (carbon source for microorganism growth) and a low concentration of growth inhibitors (acetic acid and furfural). Xylose, glucose, arabinose, acetic acid, and furfural were determined following the hydrolysis. Kinetic parameters of mathematical models for predicting these compounds in the hydrolysates were obtained. Derived parameters such as efficiency of hydrolysis or purity of hydrolysates were considered to select as optimal conditions 6% phosphoric acid at 100 degreesC for 300 min. Using these conditions, 21.4 g of sugars L-1 and <4 g of inhibitors L-1 were obtained from the hydrolysis with a water/solid ratio of 8 g of water g(-1) of sugar cane bagasse on a dry basis MH - Mexico|Tamaulipas MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000222247100020 L2 - sugar cane;bagasse;xylose;glucose;arabinose;phosphoric acid;kinetic modeling;acid hydrolysis;BIOTECHNOLOGICAL PRODUCTION; PICHIA-STIPITIS; STEAM EXPLOSION; SORGHUM STRAW; WOOD; XYLOSE; AUTOHYDROLYSIS; PREHYDROLYSIS; XYLAN; POSTHYDROLYSIS SO - Journal of Agricultural and Food Chemistry 2004 ;52(13):4172-4177 10837 UI - 3748 AU - Gao JL AU - Turner SL AU - Kan FL AU - Wang ET AU - Tan ZY AU - Qiu YH AU - Gu J AU - Terefework Z AU - Young JPW AU - Lindstrom K AU - Chen WX AD - China Agr Univ, Coll Biol Sci, Minist Agr China, Key Lab Agro Microbial Resources & Applicat, Beijing 100094, Peoples R ChinaUniv Helsinki, Dept Appl Chem & Microbiol, Bioctr 1, FIN-00014 Helsinki, FinlandYork Univ, Dept Biol, York YO1 5YW, N Yorkshire, EnglandInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoS China Agr Univ, Coll Agron, Dept Mol Genet, Guangzhou 510642, Peoples R ChinaChen, WX, China Agr Univ, Coll Biol Sci, Minist Agr China, Key Lab Agro Microbial Resources & Applicat, Beijing 100094, Peoples R China TI - Mesorhizobium septentrionale sp nov and Mesorhizobium temperatum sp nov., isolated from Astragalus adsurgens growing in the northern regions of China AB - Ninety-five rhizobial strains isolated from Astragalus adsurgens growing in the northern regions of China were classified into three main groups, candidate species 1, 11 and 111, based on a polyphasic approach. Comparative analysis of full-length 16S rRNA gene sequences of representative strains showed that candidate species I and 11 were Mesorhizobium, while candidate species 111, which consisted of non-nodulating strains, was closely related to Agrobacterium tumefaciens. The phylogenetic relationships of the three candidate species and some related strains were also confirmed by the sequencing of glnA genes, which were used as an alternative chromosomal marker. The DNA-DNA relatedness was between 11.3 and 47-1 % among representative strains of candidate species I and 11 and the type strains of defined Mesorhizobium species. Candidate III had DNA relatedness of between 4(.)3 and 25(.)2 % with type strains of Agrobacterium tumefaciens and Agrobacterium rubi. Two novel species are proposed to accommodate candidate species I and 11, Mesorhizobium septentrionale sp. nov. (type strain, SIDW014(T) =CCBAU 11014(T) = HAMBI 2582(T)) and Mesorhizobium temperatum sp. nov. (type strain, SIDW018(T) = CCBAU 11018(T) =HAMBI 2583(T)), respectively. At least two distinct nodA sequences were identified among the strains. The numerically dominant nodA sequence type was most similar to that from the Mesorhizobium tianshanense type strain and was identified in strains belonging to the two novel species as well as other, as yet, undefined genome types. Host range studies indicate that the different nodA sequences correlate with different host ranges. Further comparative studies with the defined Agrobacterium species are needed to clarify the taxonomic identity of candidate species 111 MH - United Kingdom MH - Finland MH - Mexico|Distrito Federal MH - Peoples R China PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000225366000018 L2 - RHIZOBIUM-TIANSHANENSE; DEOXYRIBONUCLEIC ACID; GENETIC DIVERSITY; SINICUS RHIZOBIA; TROPICAL LEGUMES; NODULATION GENES; ROOT-NODULES; IDENTIFICATION; XINJIANG; BACTERIA SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():2003-2012 10838 UI - 4515 AU - Gao JL AU - Weissenmayer B AU - Taylor AM AU - Thomas-Oates J AU - Lopez-Lara IM AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62210, Morelos, MexicoUniv York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUMIST, Dept Chem, Michael Barber Ctr Mass Spectrometry, Manchester M60 1QD, Lancs, EnglandGeiger, O, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apdo Postal 565-A, Cuernavaca 62210, Morelos, Mexico TI - Identification of a gene required for the formation of lyso-ornithine lipid, an intermediate in the biosynthesis of ornithine-containing lipids AB - Under phosphate-limiting conditions, some bacteria replace their membrane phospholipids by lipids not containing any phosphorus. One of these phosphorus-free lipids is an ornithine-containing lipid (OL) that is widespread among eubacteria. In earlier work, we had identified a gene (olsA) required for OL biosynthesis that probably encodes an O-acyltransferase using acyl-acyl carrier protein (acyl-AcpP) as an acyl donor and that converts lyso-ornithine lipid into OL. We now report on a second gene (olsB) required for OL biosynthesis that is needed for the incorporation of radiolabelled ornithine into OL. Overexpression of OlsB in an olsA-deficient mutant of Sinorhizobium (Rhizobium) meliloti leads to the transient accumulation of lyso-ornithine lipid, the biosynthetic intermediate of OL biosynthesis. Overexpression of OlsB in Escherichia coli is sufficient to cause the in vivo formation of lyso-ornithine lipid in this organism and is the cause for a 3-hydroxyacyl-AcpP-dependent acyltransferase activity forming lyso-ornithine lipid from ornithine. These results demonstrate that OlsB is required for the first step of OL biosynthesis, in which ornithine is N-acylated with a 3-hydroxy-fatty acyl residue in order to obtain lyso-ornithine lipid. OL formation in a wild-type S. meliloti is increased upon growth under phosphate-limiting conditions. Expression of OlsB from a broad host range vector leads to the constitutive formation of relatively high amounts of OL (12-14% of total membrane lipids) independently of whether strains are grown in the presence of low or high concentrations of phosphate, suggesting that in S. meliloti the formation of OlsB is usually limiting for the amount of OL formed in this organism. Open reading frames homologous to OlsA and OlsB were identified in many eubacteria and although in S. meliloti the olsB and olsA gene are 14 kb apart, in numerous other bacteria they form an operon MH - United Kingdom MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Article AV - English IS - 0950-382X UR - ISI:000223662100016 L2 - RHIZOBIUM-MELILOTI; THIOBACILLUS-THIOOXIDANS; ACIDIC PHOSPHOLIPIDS; ESCHERICHIA-COLI; CLONING; PROTEINS; GROWTH; PHOSPHATIDYLCHOLINE; CYCLODEAMINASE; FLAVOBACTERIUM SO - Molecular Microbiology 2004 ;53(6):1757-1770 10839 UI - 6478 AU - Gao RS AU - Popp PJ AU - Fahey DW AU - Marcy TP AU - Herman RL AU - Weinstock EM AU - Baumgardner DG AU - Garrett TJ AU - Rosenlof KH AU - Thompson TL AU - Bui PT AU - Ridley BA AU - Wofsy SC AU - Toon OB AU - Tolbert MA AU - Karcher B AU - Peter T AU - Hudson PK AU - Weinheimer AJ AU - Heymsfield AJ AD - NOAA, Aeron Lab, Boulder, CO 80305, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAUniv Colorado, Program Atmospher & Ocean Sci, Atmospher & Space Phys Lab, Boulder, CO 80309, USAUniv Colorado, Dept Chem & Biochem, Boulder, CO 80309, USANASA, Jet Prop Lab, Pasadena, CA 91109, USAHarvard Univ, Atmospher Res Project, Cambridge, MA 02138, USAHarvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoUniv Utah, Dept Meteorol, Salt Lake City, UT 84112, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USANatl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USADeutsch Zentrum Luft & Raumfahrt, Inst Phys Atmosphare, Wessling, GermanyETH, Lab Atmospharenphys, CH-8093 Zurich, SwitzerlandGao, RS, NOAA, Aeron Lab, Boulder, CO 80305, USA TI - Evidence that nitric acid increases relative humidity in low-temperature cirrus clouds AB - In situ measurements of the relative humidity with respect to ice (RHi) and of nitric acid (HNO3) were made in both natural and contrail cirrus clouds in the upper troposphere. At temperatures lower than 202 kelvin, RHi values show a sharp increase to average values of over 130% in both cloud types. These enhanced RHi values are attributed to the presence of a new class of HNO3-containing ice particles (Delta-ice). We propose that surface HNO3 molecules prevent the ice/vapor system from reaching equilibrium by a mechanism similar to that of freezing point depression by antifreeze proteins. Delta-ice represents a new link between global climate and natural and anthropogenic nitrogen oxide emissions. Including Delta-ice in climate models will alter simulated cirrus properties and the distribution of upper tropospheric water vapor MH - Germany MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 31 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000188316400036 L2 - IN-SITU MEASUREMENTS; ICE PARTICLES; CRYSTAL-GROWTH; FREEZING RESISTANCE; UPPER TROPOSPHERE; VAPOR GROWTH; HNO3; STRATOSPHERE; NUCLEATION; ADSORPTION SO - Science 2004 ;303(5657):516-520 10840 UI - 4453 AU - Gaona G AU - Nunez C AU - Goldberg JB AU - Linford AS AU - Najera R AU - Castaneda M AU - Guzman J AU - Espin G AU - Soberon-Chavez G AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca, Morelos, MexicoUniv Virginia, Hlth Sci Ctr, Dept Microbiol, Charlottesville, VA 22908, USABUAP, Inst Ciencias, Ctr Invest Ciencias Microbiol, Puebla, MexicoSoberon-Chavez, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Mol & Biotecnol, Apdo Postal 70-228, Mexico City 04510, DF, Mexico TI - Characterization of the Azotobacter vinelandii algC gene involved in alginate and lipopolysaccharide production AB - Azotobacter vinelandii is a soil gamma-proteobacteria that fixes nitrogen and forms desiccation-resistant cysts. The exopolysaccharide alginate is an integral part of the layers surrounding the cysts. Here, we reported the cloning of A. vinelandii algC, encoding the enzyme catalyzing the second step of alginate pathway. We showed that AlgC is involved not only in alginate production, but also in lipopolysaccharide (LPS) synthesis and that it seems to have both phosphomannomutase and phosphoglucomutase activities. The transcriptional analysis of the A. vinelandii algC gene showed that it contained two start sites, one of which was dependent on the alternative sigma factor AlgU/AlgT. This finding explains why alginate biosynthesis is dependent on AlgU activity, since all other alginate biosynthetic genes have been characterized previously and algC is the only alginate structural gene that is directly transcribed by this sigma factor. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000223805600028 L2 - alginate;Azotobacter vinelandii;extracytoplasmic function sigma factor;PSEUDOMONAS-AERUGINOSA; OVERLAPPING PROMOTERS; ESCHERICHIA-COLI; BIOSYNTHESIS; PHOSPHOMANNOMUTASE; EXPRESSION; ENCYSTMENT; MUTANT; PHOSPHOGLUCOMUTASE; IDENTIFICATION SO - Fems Microbiology Letters 2004 ;238(1):199-206 10841 UI - 4564 AU - Garaev MZ AU - Luca F AU - Shparlinski IE AD - Univ Nacl Autonoma Mexico, Inst Matemat, Morelia 58180, Michoacan, MexicoMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaGaraev, MZ, Univ Nacl Autonoma Mexico, Inst Matemat, CP 58180, Morelia 58180, Michoacan, Mexico TI - Character sums and congruences with n! AB - We estimate character sums with n!, on average, and individually. These bounds are used to derive new results about various congruences modulo a prime p and obtain new information about the spacings between quadratic nonresidues modulo p. In particular, we show that there exists a positive integer nmuch less thanp(1/2+epsilon) such that n! is a primitive root modulo p. We also show that every nonzero congruence class a anot equivalent to0 (mod p) can be represented as a product of 7 factorials, aequivalent ton(1)!...n(7)! (mod p), where max {n(i)\i=1,...,7} = O(p(11/12+epsilon)), and we find the asymptotic formula for the number of such representations. Finally, we show that products of 4 factorials n(1)!n(2)!n(3)!n(4)!, with max {n(1), n(2), n(3), n(4)}=O(p(6/7+epsilon)) represent "almost all" residue classes modulo p, and that products of 3 factorials n(1)!n(2)!n(3)! with max {n(1), n(2), n(3)} = O(p(5/6+epsilon)) are uniformly distributed modulo p MH - Australia MH - Mexico|Michoacan PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000223592300019 L2 - POLYNOMIAL CONGRUENCES SO - Transactions of the American Mathematical Society 2004 ;356(12):5089-5102 10842 UI - 6038 AU - Garate-Lizarraga I AU - Bustillos-Guzman JJ AU - onso-Rodriguez R AU - Luckas B AD - IPN, CICIMAR, Dept Plancton & Ecol Marina, La Paz 23000, Baja California, MexicoCtr Invest Biol Noroeste SC, La Paz, Baja California, MexicoUniv Jena, Fac Biol & Pharm, Dept Food Chem, D-07743 Jena, GermanyGarate-Lizarraga, I, IPN, CICIMAR, Dept Plancton & Ecol Marina, Apartado Postal 592, La Paz 23000, Baja California, Mexico TI - Comparative paralytic shellfish toxin profiles in two marine bivalves during outbreaks of Gymnodinium catenatum (Dinophyceae) in the Gulf of California MH - Germany MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000220102500035 SO - Marine Pollution Bulletin 2004 ;48(3-4):397-402 10843 UI - 4945 AU - Garay AH AU - Sollenberger LE AU - McDonald DC AU - Ruegsegger GJ AU - Kalmbacher RS AU - Mislevy P AD - Univ Florida, Gainesville, FL 32611, USAColegio Postgrad, Texcoco 56230, Edo Mexico, MexicoDairy Nutr Serv, Chandler, AZ 85210, USARange Cattle Res & Educ Ctr, Ona, FL 33865, USASollenberger, LE, Univ Florida, POB 110300, Gainesville, FL 32611, USA TI - Nitrogen fertilization and stocking rate affect stargrass pasture and cattle performance AB - Stargrass (Cynodon nlemfuensis Vanderyst) is an important tropical forage, but the interaction of stocking rate (SR) and N fertilizer rate on stargrass pastures is not well understood. The objective was to determine the effects of three SR (2.5, 5.0, and 7.5 bulls ha(-1)) and three N rates (112, 224, and 336 kg ha(-1) yr(-1)) on stargrass pasture characteristics and performance of Jamaica Red Poll (Bos taurus X B. indicus) weauling bulls at St. Ann, Jamaica. Soil was a bauxitic clay loam, and pastures were rotationally stocked (7-d grazing and 21-d rest period). Pregraze herbage mass increased as SR decreased (2.0-4.8 Mg ha(-1) in Year 1 and 3.3-8.3 Mg ha(-1) in Year 2). Herbage crude protein (CP) and in vitro digestible organic matter (IVDOM) generally increased with increasing SR and N rate. Bull daily gain decreased curvilinearly from 0.70 to 0.26 kg in Year 1 and 0.65 to 0.35 kg in Year 2 as SR increased from 2.5 to 7.5 head ha(-1). Daily gain increased linearly as N rate increased from 112 to 336 kg ha(-1). The N fertilizer rate had little effect on gain per hectare at the lowest SR, but gain increased with fertilization up to 224 kg N ha(-1) for a SR of 5 head ha(-1) and up to 336 kg N ha(-1) for a SR of 7.5. In conclusion, economic return from N fertilization of stargrass pastures is dependent upon SR, with greater N rates more likely to be profitable if SR is high MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000222582400032 L2 - GRASSES; MATTER; HEIGHT; FIBER SO - Crop Science 2004 ;44(4):1348-1354 10844 UI - 4946 AU - Garay AH AU - Sollenberger LE AU - Staples CR AU - Pedreira CGS AD - Univ Florida, Gainesville, FL 32610, USAColegio Postgrad, Texcoco 56230, Edo Mexico, MexicoUniv Sao Paulo, ESALQ, BR-13418900 Piracicaba, SP, BrazilSollenberger, LE, Univ Florida, POB 110300, Gainesville, FL 32610, USA TI - 'Florigraze' and 'Arbrook' rhizoma peanut as pasture for growing Holstein heifers AB - 'Florigraze' and 'Arbrook' are the most widely used cultivars of rhizoma peanut (Arachis glabrata Benth.), but performance of ruminants grazing these cultivars has not been compared. The objective of this study was to determine sward characteristics and performance of Holstein replacement heifers (Bos taurus) on continuously stocked pastures of Florigraze and Arbrook growing on a loamy, siliceous, hyperthermic Grossarenic Paleudult soil. Herbage mass and allowance did not differ between cultivars during 3 yr of grazing and averaged 2840 kg DM ha(-1) and 2.25 kg of forage kg(-1) of animal live weight, respectively. Percentage of Arbrook in pasture herbage mass decreased from Year 1 (89%) to Year 3 (66%), while percentage of Florigraze remained relatively constant (90 to 87%). Average herbage crude protein (CP) concentration and in vitro organic matter digestibility (IVOMD) were greater in Florigraze than in Arbrook (177 vs. 161 g kg(-1) and 705 vs. 661 g kg(-1), respectively). Average stocking rate varied little between cultivars, and animal performance was generally similar until Year 3. With a much lower percentage of rhizoma peanut in herbage mass for Arbrook than Florigraze pastures in Year 3, average daily gain (ADG; 701 vs. 516 g) and gain ha(-1) (575 vs. 418 kg) were greater for heifers grazing Florigraze than for those grazing Arbrook. Florigraze appears better suited for pasture programs with continuous stocking, primarily because of superior persistence, leading to greater animal performance with time MH - Brazil MH - Mexico|Estado De Mexico MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000222582400033 L2 - PRODUCTIVITY; ALFALFA SO - Crop Science 2004 ;44(4):1355-1360 10845 UI - 5213 AU - Garay JA AU - Rajsbaum S AD - Bell Labs, Lucent Technol, Comp Sci Res Ctr, Murray Hill, NJ 07974, USANatl Autonomous Univ Mexico, Inst Matemat, Mexico City 04510, DF, MexicoGaray, JA, Bell Labs, Lucent Technol, Comp Sci Res Ctr, 600 Mt Ave, Murray Hill, NJ 07974 USA TI - Latin American theoretical informatics - Preface MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - J;Editorial Material AV - English IS - 0304-3975 UR - ISI:000221969900001 SO - Theoretical Computer Science 2004 ;321(1):1-3 10846 UI - 5964 AU - Garcera-Teruel A AU - Xoconostle-Cazares B AU - Rosas-Quijano R AU - Ortiz L AU - Leon-Ramirez C AU - Specht CA AU - Sentandreu R AU - Ruiz-Herrera J AD - IPN, Ctr Invest & Estud Avanzados, Unidad Irapuat, Dept Ingn Genet, Irapuato 36500, Gto, MexicoIPN, Ctr Invest & Estud Avanzados, Dept Biotecnol, Mexico City 07738, DF, MexicoUniv Valencia, Fac Farm, Secc Microbiol, E-46010 Valencia, SpainUniv Massachusetts, Boston, MA 02125, USARuiz-Herrera, J, IPN, Ctr Invest & Estud Avanzados, Unidad Irapuat, Dept Ingn Genet, Apartado Postal 629, Irapuato 36500, Gto, Mexico TI - Loss of virulence in Ustilago maydis by Umchs6 gene disruption AB - A gene encoding a sixth chitin synthase (Umchs6, sequence GenBank accession No. AF030554) from the plant pathogenic hemibasidiomycete Ustilago maydis (DC.) Cda. was isolated and characterized. The predicted protein is 1103 amino acids in length with a calculated molecular mass of 123.5 kDa. a2b2 null mutants were obtained by substitution of a central fragment of the Umchs6 gene with the hygromycin resistance cassette, and a1b1 null mutants were obtained by genetic recombination in plants of an a2b2Deltach6 and a wild-type a1b1 strain. The mutation had no effect on the dimorphic transition in vitro or on mating, and growth rate of the mutants was only slightly reduced. On the other hand, they displayed important alterations in cell morphology, particularly at the mycelial stage, and in the staining pattern with calcofluor white. Levels of chitin synthase activity in vitro and chitin content were reduced. The most noticeable characteristic of the mutants was their almost complete loss of virulence to maize (Zea mays L.). This was a recessive character. Microscopic observations during the infectious process suggest that chitin synthase 6 activity is very important for growth of the fungus into the plant. Transformation of a2b2Deltach6 mutants with an autonomous replicating plasmid carrying the full Umchs6 gene restored their normal morphological phenotype and virulence. These results are evidence that the mutation in the Umchs6 gene was solely responsible for the phenotypic alterations observed. (C) 2003 Elsevier SAS. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 0923-2508 UR - ISI:000220245700006 L2 - cell wall;chitin;chitin synthesis;fungal virulence;Ustilago;I CHITIN SYNTHASE; MOTOR-LIKE DOMAIN; CORN SMUT FUNGUS; CANDIDA-ALBICANS; MUTANTS; SYNTHETASE; RESISTANCE; ENCODES; SYSTEM; GROWTH SO - Research in Microbiology 2004 ;155(2):87-97 10847 UI - 5399 AU - Garcia-Barrios L AU - Ong CK AD - Colegio Frontera Sur, Chiapas 29290, MexicoWorld Agroforestry Ctr, Nairobi, KenyaGarcia-Barrios, L, Colegio Frontera Sur, Carretera Panamer & Perisur S-N, Chiapas 29290, Mexico TI - Ecological interactions, management lessons and design tools in tropical agroforestry systems AB - During the 1980s, land- and labor-intensive simultaneous agroforestry systems (SAFS) were promoted in the tropics, based on the optimismon tree-crop niche differentiation and its potential for designing tree-crop mixtures using high tree-densities. In the 1990s it became clearer that although trees would yield crucial products and facilitate simultaneous growing of crops, they would also exert strong competitive effects on crops. In the meanwhile, a number of instruments for measuring the use of growth resources, exploratory and predictive models, and production assessment tools were developed to aid in understanding the opportunities and biophysical limits of SAFS. Following a review of the basic concepts of interspecific competition and facilitation between plants in general, this chapter synthesizes positive and negative effects of trees on crops, and discusses how these effects interact under different environmental resource conditions and how this imposes tradeoffs, biophysical limitations and management requirements in SAFS. The scope and limits of some of the research methods and tools, such as analytical and simulation models, that are available for assessing and predicting to a certain extent the productive outcome of SAFS are also discussed. The review brings out clearly the need for looking beyond yield performance in order to secure long-term management of farms and landscapes, by considering the environmental impacts and functions of SAFS MH - Kenya MH - Mexico|Chiapas PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 6 U4 - Agronomy;Forestry U5 - J;Article AV - English IS - 0167-4366 UR - ISI:000221640600017 L2 - growth resources;indices;predictive understanding;roots;simulation models;tree-crop interactions;HUMID TROPICS; CROP GROWTH; WATER; YIELD; CONSERVATION; COMPETITION; AGRICULTURE; RESOURCES; SAVANNAS; MODELS SO - Agroforestry Systems 2004 ;61(1):221-236 10848 UI - 4759 AU - Garcia-Becerra R AU - Cooney AJ AU - Borja-Cacho E AU - Lemus AE AU - Perez-Palacios G AU - Larrea F AD - Inst Nacl Ciencia Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoBaylor Coll Med, Dept Mol & Cellular Biol, Houston, TX 77030, USAUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Sch Med, Mexico City 04510, DF, MexicoLarrea, F, Inst Nacl Ciencia Med & Nutr Salvador Zubiran, Dept Reprod Biol, Quiroga 15, Mexico City 14000, DF, Mexico TI - Comparative evaluation of androgen and progesterone receptor transcription selectivity indices of 19-nortestosterone-derived progestins AB - Synthetic 19-nortestosterone-derived progestins show affinity for the androgen receptor (AR) and retain varying degrees of androgenic activity. In this study, AR- and progesterone receptor (PR)-dependent transcriptional activation induced by norethisterone (NET), levonorgestrel (LNG) and gestodene (GSD), and their 5alpha-reduced derivatives, including limited trypsin digestion of AR in the presence of natural and synthetic progestins were investigated. The results confirmed the progestogenic activity of the three 19-nortestosterone derivatives, which decreases after reduction of the 4-ene-double bound. These compounds were able to activate AR-dependent reporter gene expression, LNG and GSD being the stronger activators. 5alpha-Reduction of LNG and GSD did not change their androgenic transcriptional activity; however, the activation of AR by 5alpha-NET was four-fold higher than NET. The highest selectivity transcriptional index, as a measure of progestogenicity versus androgenicity, was obtained for NET. The 5alpha-reduced derivatives had values significantly lower than those of their parent compounds. Non-reduced and 5alpha-reduced 19-nortestosterone progestins induced virtually identical proteolysis fragmentation patterns of the AR to those observed with DHT. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0960-0760 UR - ISI:000223088500003 L2 - androgenic effects;androgen receptor;contraception;gene expression;synthetic progestins;RING REDUCED METABOLITES; ORAL-CONTRACEPTIVES; ESTROGENIC ACTIVITY; BINDING AFFINITIES; GENE-EXPRESSION; TARGET ORGANS; GESTODENE; PROTEINS; HORMONE; NORETHISTERONE SO - Journal of Steroid Biochemistry and Molecular Biology 2004 ;91(1-2):21-27 10849 UI - 5682 AU - Garcia-Casillas PE AU - Beesley AM AU - Bueno D AU - Matutes-Aquino JA AU - Martinez CA AD - Grp Cementos Chihuahua SA CV, Dept Inv, Chihuahua, MexicoUniv Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, EnglandCtr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv Autonoma Ciudad Juarez, Inst Ingn & Tecnol, Chihuahua, MexicoGarcia-Casillas, PE, Grp Cementos Chihuahua SA CV, Dept Inv, Chihuahua, Mexico TI - Remanence properties of barium hexaferrite AB - Barium hexaferrites have been widely used as permanent magnets, however one of the most important parameters that characterizes these ferrites is the switching field distribution (SFD). This work calculates the SFD on a small particle barium ferrite (BaFe12O19) obtained by coprecipitation from chlorides in an alkaline medium using the irreversible component of the magnetization. Forward and reverse switching field distribution curves were obtained by differentiation of isothermal remanent magnetization (IRM) and do demagnetisation (DCD) curves. It was found that both values differ by a factor of 3.5, quite away froth the value of non-interacting systems. The Henkel plot was built from these data sets, indicating a predominant region with demagnetising interaction between particles, and a small region in which the particles interact constructively to the magnetization, according to the Preisach model framework. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Chihuahua PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500046 L2 - chemical synthesis;scanning and transmission electron microscopy magnetic measurements;FERRITE; MEDIA SO - Journal of Alloys and Compounds 2004 ;369(1-2):185-189 10850 UI - 3660 AU - Garcia-Colunga J AU - Vazquez-Gomez E AU - Miledi R AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Queretaro 76230, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA, USAGarcia-Colunga, J, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla, Queretaro 76230, Mexico TI - Combined actions of zinc and fluoxetine on nicotinic acetylcholine receptors AB - Zinc and nicotinic acetylcholine receptors (nAChRs) seem to be associated with major depression, and some antidepressants, including fluoxetine (Prozac), antagonize nAChRs. Therefore, a study was made of the modulation of neuronal alpha4beta4 and muscle alpha1beta1gammadelta nAChRs, expressing in oocytes, by the combined action of zinc and fluoxetine. At a holding potential of -60 mV, 200 muM zinc increased by 361% the currents elicited by acetylcholine (ACh currents) for alpha4beta4 and by 182% for alpha1beta1gammadelta nAChRs. In contrast, 5 muM fluoxetine reduced the ACh currents to 31% for alpha4beta4 and to 45% for a1b1gd nAChRs. Additionally, fluoxetine reduced more the ACh currents in the presence of zinc: to 17% for alpha4beta4 and to 19% for alpha1beta1gammadelta nAChRs, and after washing out the fluoxetine the ACh current did not recover its zinc-potentiated value. Moreover, when ACh-activated nAChRs were exposed first to fluoxetine and then zinc was added, the potentiating effect of zinc was very small for muscle nAChRs and was nil for neuronal receptors. Thus, the inhibiting effect of fluoxetine prevails over the potentiating action of zinc. Finally, the effects of both zinc and fluoxetine were voltage independent, indicating that these substances interact outside the ion channel. As fluoxetine nullifies the effects of zinc, it appears that both substances interact in the same site. These results should help understand better the roles played by zinc, antidepressants, nAChRs and their combination in brain functions and in the treatment of depression MH - Mexico|Queretaro MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Genetics & Heredity;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1470-269X UR - ISI:000225731200008 L2 - cations;major depression;antidepressants;modulation of nicotinic receptors;Xenopus oocytes;FORCED SWIM TEST; HIPPOCAMPAL SLICES; MONOAMINE UPTAKE; NMDA RECEPTORS; ANTIDEPRESSANTS; MODULATION; BLOCKAGE; MUSCLE; DEPRESSION; RELEASE SO - Pharmacogenomics Journal 2004 ;4(6):388-393 10851 UI - 5334 AU - Garcia-Cruz I AU - Martinez-Magadan JM AU - Bofill JM AU - Illas F AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Barcelona, Dept Quim Organ, E-08028 Barcelona, SpainUniv Barcelona, Ctr Especial Recerca Quim Teor, E-08028 Barcelona, SpainUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, SpainGarcia-Cruz, I, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent Lazaro Cardenas 152,Colonia San Bartolo, Mexico City 07730, DF, Mexico TI - Theoretical prediction of benzyne-like species in pyrene diradicals AB - The different products that can be obtained from pyrene dehydrogenation have been studied by means of hybrid density functional theory. Most of the didehydrogenated species exhibit a diradical character. This is supported by the closeness between the geometry and energy of singlet and triplet states and the open-shell nature of the singlet state. However, three didehydrogenated species have been found to exhibit a closed-shell singlet electronic ground state. The analysis of the electronic structure, the formation energy of these didehydrogenated species, and their geometrical structure reveals that these three didehydrogenated species are better described as benzyne-like moieties; two of them are of o- and one of m-benzyne character. The two o-benzyne species have lower energies than the m-benzyne and are favored upon diradical formation. This interpretation is fully supported by the analysis of multiconfigurational wave functions and the order of stabilities confirmed by second-order multireference perturbation theory calculations. A possible implication of the reactivity of these benzyne-like species in asphaltene formation is discussed MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000221833300017 L2 - DENSITY-FUNCTIONAL THEORY; POLYCYCLIC AROMATIC-HYDROCARBONS; 2ND-ORDER PERTURBATION-THEORY; SPIN-FLIP APPROACH; P-BENZYNE; ORGANIC-MOLECULES; RADICAL-CATION; BASIS-SETS; BOND; BIRADICALS SO - Journal of Physical Chemistry A 2004 ;108(23):5111-5116 10852 UI - 4141 AU - Garcia-Ferreira S AU - Sakai M AU - Sanchis M AD - UNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoKanagawa Univ, Dept Math, Yokohama, Kanagawa 2218686, JapanUniv Jaume I, Dept Matemat, Castello 12071, SpainGarcia-Ferreira, S, UNAM, Inst Matemat, Apartado Postal 61-3, Morelia 58089, Michoacan, Mexico TI - Free topological groups over omega(mu)-metrizable spaces AB - Let omega(mu) be an uncountable regular cardinal. For a Tychonoff space X, we let A(X) and F(X) be the free Abelian topological group and the free topological group over X, respectively. In this paper, we establish the next equivalences. Theorem. Let X be a space. The following are equivalent. 1. (X, U-X) is an omega(mu)-metrizable uniform space, where U-X is the universal uniformity on X. 2. A(X) is topologically orderable and chi(A(X)) = omega(mu). 3. The derived set X-d is omega(mu)-compact and X is omega(mu)-metrizable. Theorem. Let X be a non-discrete space. Then, the following are equivalent. 1. X is omega(mu)-compact and omega(mu)-metrizable. 2. (X, U-X) is omega(mu)-metrizable and X is omega(mu)-compact. 3. F(X) is topologically orderable and chi(F(X)) = omega(mu). We also prove that an omega(mu)-metrizable uniform space (X, U) is a retract of its uniform free Abelian group A( X, U) and of its uniform free group F( X, U) MH - Japan MH - Mexico|Michoacan MH - Spain PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000224587700007 L2 - topologically orderable group;uniform space;kappa-compact;omega(mu)-metrizable;uniform free group;uniform free Abelian group;retract SO - Houston Journal of Mathematics 2004 ;30(4):1039-1053 10853 UI - 6129 AU - Garcia-Ferreira S AU - Sanchis M AD - UNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoUniv Jaume I, Dept Matemat, Castello 12071, SpainGarcia-Ferreira, S, UNAM, Inst Matemat, Postal 61-3, Morelia 58089, Michoacan, Mexico TI - Weak selections and pseudocompactness AB - We prove that every pseudocompact space that admits a weak selection is sequentially compact MH - Mexico|Michoacan MH - Spain PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000189298900033 L2 - pseudocompact space;weak selection SO - Proceedings of the American Mathematical Society 2004 ;132(6):1823-1825 10854 UI - 5190 AU - Garcia-Godinez P AU - Newman ET AU - Silva-Ortigoza G AD - Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla 72570, MexicoUniv Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USAGarcia-Godinez, P, Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Apartado Postal 1152, Puebla 72570, Mexico TI - 3-geometries and the Hamilton-Jacobi equation AB - In the first part of this work we show that on the space of solutions of a certain class of systems of three second-order PDE's, u(alphaalpha)=Y(alpha,beta,u,u(alpha),u(beta)), u(betabeta)=Psi(alpha,beta,u,u(alpha),u(beta)) and u(alphabeta)=Omega(alpha,beta,u,u(alpha),u(beta)), a three-dimensional definite or indefinite metric, g(ab), can be constructed such that the three-dimensional Hamilton-Jacobi equation, g(ab)u(,a)u(,b)=1 holds. Furthermore, we remark that this structure is invariant under a subset of contact transformations. In the second part, we obtain analogous results for a certain class of third-order ordinary differential equation (ODE's), u(''')=Lambda(s,u,u('),u(')). In both cases, we apply our general results to the cental force problem. (C) 2004 American Institute of Physics MH - Mexico|Puebla MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000222094100001 L2 - DIFFERENTIAL-EQUATIONS; SURFACES; GEOMETRY; SPACES SO - Journal of Mathematical Physics 2004 ;45(7):2543-2559 10855 UI - 6443 AU - Garcia-Godinez P AU - Newman ET AU - Silva-Ortigoza G AD - Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Puebla, MexicoUniv Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260, USANewman, ET, Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Apartado Postal 1152, Puebla, Mexico TI - 2-geometries and the Hamilton-Jacobi equation AB - By using two different procedures we show that on the space of solutions of a certain class of second-order ordinary differential equations, u"=Lambda(s,u,u'), a two-dimensional definite or indefinite metric, g(ab), can be constructed such that the two-dimensional Hamilton-Jacobi equation, g(ab)u(,a)u(,b)=1 holds. Furthermore, we show that this structure is invariant under a certain subset of contact transformations (canonical transformations). Two examples are given. (C) 2004 American Institute of Physics MH - Mexico|Puebla MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000188281900013 L2 - DIFFERENTIAL-EQUATIONS; GEOMETRY; SURFACES; SPACES SO - Journal of Mathematical Physics 2004 ;45(2):725-735 10856 UI - 5010 AU - Garcia-Gutierrez D AU - Gutierrez-Wing C AU - Miki-Yoshida M AU - Jose-Yacaman M AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAInst Nacl Invest Nucl, Mexico City 52045, DF, MexicoCtr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv Texas, Ctr Nano & Mol Sci & Technol, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAJose-Yacaman, M, Univ Texas, Texas Mat Inst, 1 Univ Stn C2201,Bldg ETC,Room 8 102, Austin, TX 78712 USA TI - HAADF study of Au-Pt core-shell bimetallic nanoparticles AB - Bimetallic Pt/Au nanoparticles have been synthesized by the polyol method, stabilized by poly (vinylpyrrolidone) (PVP). The structure of the particles has been determined using transmission electron microscopy and a HAADF (High Angle Annular Dark Field) technique. Some particles present a core-shell structure, with a contrast not predicted by simple atomic number contrast (approximate to Z(2)). Strain fields present in the core-shell interface are thought to be the cause of this contrast, which depends on the orientation of the particle with respect to the electron beam. We propose HAADF as a useful technique to identified core-shell structures in nanoparticle systems MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 14 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000221675000017 L2 - TRANSMISSION ELECTRON-MICROSCOPY; STRUCTURAL-ANALYSIS; ATOMIC-SCALE; PARTICLES; CATALYSTS; CLUSTERS; PALLADIUM; STRAIN SO - Applied Physics A-Materials Science & Processing 2004 ;79(3):481-487 10857 UI - 3879 AU - Garcia-Hinojosa JA AU - Gonzalez C AU - Juarez JA AU - Surrapa MK AD - Univ Nacl Autonoma Mexico, Fac Chem, Dept Engn Met, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Mat Res, Dept Met & Ceram Mat, Mexico City 04510, DF, MexicoIndian Inst Sci, Dept Met, Bangalore 560012, Karnataka, IndiaGarcia-Hinojosa, JA, Univ Nacl Autonoma Mexico, Fac Chem, Dept Engn Met, Circuito Inst S-N,Cd Univ, Mexico City 04510, DF, Mexico TI - Effect of grain refinement treatment on the microstructure of cast Al-7Si-SiCp composites AB - An addition of Ti or Ti/B is an accepted technique to produce cast aluminum alloys having fine grain size and superior mechanical properties. Present investigation focuses on the role of grain refinement treatment on the SiC particle distribution in Al-7 wt.% Si-10 vol.% SiCp cast composites and also on the degree of refinement of matrix microstructure. Composites manufactured by vortex method were treated with three different commercial grain refiners namely; K2TiF6 salt, Al-6Ti and Al-5Ti-1B master alloys. Microstructural characteristics including nature of distribution of SiCp in the matrix, grain size and dendritic arm spacing have been studied. It was found that complete dewetting of the SiCp and consequently their rejection from the melt takes place when the composite was treated with K2TiF6 salt. Improved distribution of SiCp in the matrix of composites was observed when the melt was treated with either Al-6Ti or Al-5Ti-1B master alloy. Composite melt treated with Al-5Ti-1B master alloy show excellent combination of matrix grain refinement and uniform SiCp distribution. (C) 2004 Published by Elsevier B.V MH - India MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000225127800008 L2 - grain refinement;light weight composites;Al-SiCp composites;Al-Ti master alloys;NUCLEATION; PARTICLES; INTERFACE; ALUMINUM; ALLOYS SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;386(1-2):54-60 10858 UI - 4227 AU - Garcia-Hinojosa JA AU - Gonzalez CR AU - Juarez JL AU - Surappa MK AD - Fac Chem, Dept Engn Met, Mexico City 04210, DF, MexicoIndian Inst Sci, Bangalore, Karnataka, IndiaNatl Autonomous Univ Mexico, Mat Res Inst, Mexico City 04510, DF, MexicoGarcia-Hinojosa, JA, Fac Chem, Dept Engn Met, Circuito Inst S-N,Cd Univ, Mexico City 04210, DF, Mexico TI - Effect of Sr addition on an Al-7Si-10 vol.% SiCP cast composites AB - The effect of additions of Sr (in the range 0.05-0.5%) on the microstructural characteristics of Al-7 wt.% Si-10 vol.% SiCp composites have been studied. Optical microscopy (OM) SEM, EDS, WDS microanalysis techniques and X-ray diffraction powder techniques have been used for the characterization of the composites. It was found that Sr concentrations between 0.05 and 0.20 facilitates incorporation of higher volume fraction of SiC particles and also does not contribute to the overall modification of the matrix. However, at higher wt.% of Sr, Sr-rich compounds were found. These Strontium rich compounds were located at the matrix-ceramic interface. (C) 2004 Published by Elsevier B.V MH - India MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000224264900038 L2 - MMCs;interface;microstructures;particle-reinforcement SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;382(1-2):315-320 10859 UI - 4537 AU - Garcia-Lara S AU - Bergvinson DJ AU - Burt AJ AU - Ramputh AI AU - az-Pontones DM AU - Arnason JT AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Ottawa, Dept Biol, Ottawa, ON K1N 6N5, CanadaUniv Autonoma Metropolitana, Dept Ciencias Salud, Mexico City 09340, DF, MexicoBergvinson, DJ, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - The role of pericarp cell wall components in maize weevil resistance AB - The maize weevil (MW), Sitophilus zeamais (Motsch.), is a storage pest that causes serious losses in maize (Zea mays L.) in developing countries. This study was conducted to investigate the role of pericarp cell wall components as factors that contribute to MW resistance in nine genotypes of tropical maize. Six susceptibility parameters to MW were measured and related to cell wall components such as simple phenolic acids, diferulic acids (DiFAs), hydroxyproline-rich glycoproteins (HRGPs), and nutritional and physical traits. Weevil susceptibility was negatively correlated (P < 0.001) with total DiFAs (r = -0.77), HRGPs (r = -0.82), grain hardness (r = -0.87), pericarp/whole kernel (P/K) ratio (r = -0.68), and pericarp thickness (r = -0.86). A detailed analysis of phenolics indicated the presence of trans-ferulic acid (FA),p-coumaric acid (CA), and four isomers of DiFA. The most prominent were 5,5'-DiFA, 8-O-4-DiFA, and 8,5'-DiFA benzofuran form (DiFAb). On the basis of regression models, 5,5'-DiFA, 8-O-4-DiFA, trans-FA, and p-CA were the most important phenolic components of resistance. Grain hardness was correlated (P < 0.001) with cell wall bound HRGPs (r = 0.61) and DiFAs (r = 0.75). Cell wall cross-linking components could contribute to MW resistance by fortification of the pericarp cell wall as well as increase grain hardness. This structurally based mechanism should be considered in the development of hybrids and varieties where storage pests are prevalent MH - Canada MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000223586200006 L2 - HYDROXYPROLINE-RICH GLYCOPROTEINS; SITOPHILUS-ZEAMAIS; FERULIC ACID; GRAIN; POPULATIONS; COLEOPTERA; PLANTS SO - Crop Science 2004 ;44(5):1546-1552 10860 UI - 2687 AU - Garcia-Madrigal MD AU - Heard RW AU - Suarez-Morales E AD - ECOSUR, Unidad Chetumal, Chetumal 77000, Quintana Roo, MexicoUniv So Mississippi, Gulf Coast Res Lab, Ocean Springs, MS 39566, USASuarez-Morales, E, ECOSUR, Unidad Chetumal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - Records of and observations on tanaidaceans (Peracarida) from shallow waters of the Caribbean coast of Mexico AB - As in other tropical areas, the tanaidacean fauna of the western Caribbean Sea remains poorly known. Our study is based on the examination of several families of Tanaidacea from samples collected at 30 sites in a variety of shallow-water marine habitats along the Mexican Caribbean coast, located on the westernmost section of the Caribbean Basin. Up to 13 species belonging to seven families and 11 genera were identified. Of these species, four have been previously recorded from the Caribbean coast of Mexico and nine constitute new regional records. Nine species have been known to occur in the Caribbean Basin and four species, Hexapleomera robusta (Moore), Leptochelia dubia (Kroyer), Sinelobus stanfordi (Richardson), and Zeuxo kurilensis (Kussakin A Tzareva) are widely distributed forms, occurring in two or more oceans. Taxonomic and comparative comments are provided for some species recorded in the surveyed area. The male of Pseudotanais (Akanthinotanais) mortenseni Sieg is recognized and documented for the first time, based on the only specimen found MH - Mexico|Quintana Roo MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000228019400001 L2 - GULF-OF-MEXICO; CRUSTACEA; GENERA; NOTOTANAIDAE; FAUNA; KEY SO - Crustaceana 2004 ;77():1153-1177 10861 UI - 4310 AU - Garcia-Moreno J AU - Navarro-Siguenza AG AU - Peterson AT AU - Sanchez-Gonzalez LA AD - Max Planck Res Ctr Ornithol, D-78315 Radolfzell am Bodensee, GermanyUniv Konstanz, Dept Biol, D-78457 Constance, GermanyNatl Autonomous Univ Mexico, Fac Ciencias, Dept Biol Evolut, Museo Zool Alfonso L Herrera, Mexico City 04510, DF, MexicoUniv Kansas, Nat Hist Museum, Lawrence, KS 66045, USAGarcia-Moreno, J, Max Planck Res Ctr Ornithol, Schlossallee 2, D-78315 Radolfzell am Bodensee, Germany TI - Genetic variation coincides with geographic structure in the common bush-tanager (Chlorospingus ophthalmicus) complex from Mexico AB - Cloud forests are distributed in the Neotropics, from northern Mexico to Argentina, under very specific ecological conditions, namely slopes with high humidity input from clouds and mist. Its distribution in Mesoamerica is highly fragmented, similar to an archipelago, and taxa are thus frequently represented as sets of isolated populations, each restricted to particular mountain ranges and often showing a high degree of divergence, both morphologically and genetically. The common bush-tanager (Chlorospingus ophthalmicus, Aves Thraupidae) inhabits cloud forests from eastern and southern Mexico south to northwestern Argentina. Here we use 676 bp of mtDNA (around the ATPase 8 gene) to explore the genetic variation and phylogeographic structure of the Mexican populations of C ophthalmicus. Phylogenctic analyses of mtDNA sequences indicate deep genetic structure. Five major clades, which segregate according to geographic breaks, are identified (starting from the deepest one in the phylogeny): (1) Southern Chiapas and Northern Central America, (2) Tuxtlas massif, (3) Sierra Madre del Sur, (4) Eastern Oaxaca and Northern Chiapas, and (5) Sierra Madre Oriental. The long history of isolation undergone by each clade, as suggested by the phylogeny, implies that the species status of each of them should be revised. (C) 2004 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Review AV - English IS - 1055-7903 UR - ISI:000224047400014 L2 - Chlorospingus ophthalmicus;cloud forest;mesoamerica;phylogeography;mtDNA;GLOBAL CLIMATE-CHANGE; ANDEAN BIRDS; COMPARATIVE PHYLOGEOGRAPHY; MOLECULAR SYSTEMATICS; MITOCHONDRIAL GENOME; POPULATION-STRUCTURE; SPECIATION PROCESS; DIVERGENCE TIMES; CENTRAL-AMERICA; SPECIES LIMITS SO - Molecular Phylogenetics and Evolution 2004 ;33(1):186-196 10862 UI - 3619 AU - Garcia-Ortiz JE AU - Garcia-Cruz D AU - Mendoza-Topete R AU - Quiroz-Mercado H AU - Garcia-Cruz MO AU - Sanchez-Corona J AD - Univ Autonoma Coahuila, Fac Med, Ctr Invest Biomed, Dept Immunobiol Mol, Torrance, CA, USASanchez-Corona, J, AP 1-3838, Guadalajara, Jalisco, Mexico TI - Complete achromatopsia associated with skeletal anomalies: A new autosomal recessive syndrome AB - Complete achromatopasia associated with skeletal anomalies: a new autosomal recessive. syndrome: Achromatopsia or rod monochromatism is the complete absence of color discrimination. with an estimated frequency of 1 in 100.000. To date the McKusick Cataloggue includes more than 10 entities, related to Achromatopsia. This paper describes four Mexican sibs with a stationary rod monochromatism. associated with long fingers and toes. hypothenar and thenar hypoplasia and pes planus. suggesting a new genetic entity probably inherited in an autosomal recessive mode MH - Mexico|Jalisco MH - USA PB - GENEVA 4: MEDECINE ET HYGIENE RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medical Ethics;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1015-8146 UR - ISI:000225942200009 L2 - achromatopsia;rod monochromatism;autosomal recessive;color vision deficiency;skeletal anomalies;TOTAL COLOURBLINDNESS; ALPHA-SUBUNIT; MUTATIONS; GENE SO - Genetic Counseling 2004 ;15(4):455-461 10863 UI - 6771 AU - Garcia-Ortiz JE AU - Cox ST AU - Sandoval-Ramirez L AU - Little AM AU - Marsh SGE AU - Madrigal JA AU - Arguello JR AD - Univ Autonoma Coahuila, Fac Med, Ctr Invest Biomed, Dept Inmunobiol Mol, Torreon 27000, Coahuila, MexicoRoyal Free Hosp, Sch Med, Anthony Nolan Res Inst, London, EnglandCMNO IMSS, Ctr Invest Biomed Occidente, Div Genet, Guadalajara, Jalisco, MexicoArguello, JR, Univ Autonoma Coahuila, Fac Med, Ctr Invest Biomed, Dept Inmunobiol Mol, Gregorio A Garcia 198 Sur, Torreon 27000, Coahuila, Mexico TI - A novel HLA-A allele: A*0257 AB - A novel human leucocyte antigen-A*02 (HLA-A*02) allele was detected by reference strand-mediated conformation analysis (RSCA) of a DNA sample from a Tarahumara individual. Direct sequencing of HLA-A locus polymerase chain reaction products identified a mutation in one of the alleles. Cloning and sequencing confirmed the presence of a new allele, A*0257 which differed from A*0206 by two nucleotides at positions 355 and 362, inducing changes in residues 95 and 97, respectively, within the peptide-binding site. Those changes suggest that allele A*0257 may have resulted from an intralocus recombination event MH - United Kingdom MH - Mexico|Coahuila MH - Mexico|Jalisco PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology;Immunology;Pathology U5 - J;Article AV - English IS - 0001-2815 UR - ISI:000186913600013 L2 - HLA-A*0257;new HLA allele;reference strand-mediated conformation analysis;SUBTYPES; ORIGINS SO - Tissue Antigens 2004 ;63(1):85-87 10864 UI - 3738 AU - Garcia-Rodriguez F AU - Metzeltin D AU - Sprechmann P AU - Morales LFB AD - Fac Ciencias, Secc Limnol, Montevideo 11400, UruguayUniv Frankfurt, Inst Bot, D-60323 Frankfurt, GermanyFac Ciencias, Dept Paleontol, Montevideo 11400, UruguayCtr Invest BIol Noroeste, La Paz 23000, BCS, MexicoGarcia-Rodriguez, F, Fac Ciencias, Secc Limnol, Igua 4225, Montevideo 11400, Uruguay TI - Late Pleistocene and Holocene development of Castillos Lagoon in relation of sea level variation, SE Uruguay AB - Paleolimnological methods were used to track the Late Pleistocene and Holocene development of Castillos Lagoon, SE Uruguay. During the Late Pleistocene, the system showed terrestrial characteristics as the sediment core contained neither diatoms nor chrysophyte cysts. After an aquatic system established, dominance of marine/brackish diatoms was observed, which indicates the occurrence of a marine/brackish coastal system. Increases in relative abundance of freshwater diatoms were observed during regressive events, thus suggesting a decrease in salinity levels. Higher trophic states were observed during regression than transgression events, probably because of increased runoff and erosion as regressions took place. The same relationship between trophic state, diatom species composition and sea level variation, had been observed in other coastal systems of SE Uruguay MH - Germany MH - Mexico|Baja California Sur MH - Uruguay PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 3 U4 - Paleontology U5 - J;Article AV - English IS - 0028-3630 UR - ISI:000225543900001 L2 - TROPHIC STATE CHANGES; ROCHA LAGOON; LAKE BLANCA; BRAZIL; SEDIMENTS SO - Neues Jahrbuch fur Geologie und Palaontologie-Monatshefte 2004 ;(11):641-661 10865 UI - 5377 AU - Garcia-Rodriguez F AU - Metzeltin D AU - Sprechmann P AU - Trettin R AU - Stams G AU - Beltran-Morales LF AD - Fac Ciencias, Sect Limnol, Montevideo 11400, UruguayFac Ciencias, Dept Paleontol, Montevideo 11400, UruguayUniv Frankfurt, Inst Bot, D-60323 Frankfurt, GermanyUFZ Leipzig Halle GmbH, D-06120 Halle An Der Saale, Salle, GermanyCtr Invest Biol Noroeste, La Paz 23000, BCS, MexicoGarcia-Rodriguez, F, Fac Ciencias, Sect Limnol, Igua 4225, Montevideo 11400, Uruguay TI - Upper Pleistocene and Holocene paleosalinity and trophic state changes in relation to sea level variation in Rocha Lagoon, southern Uruguay AB - Paleolimnological data are presented on trophic development in relation to sea level variation in Rocha Lagoon, a 72 km(2) coastal lagoon in southern Uruguay. Using sediment cores that extended to similar to20,000 yr BP, analyses of grain size, organic matter, carbonate, total carbon, nutrients, and diatoms allowed us to infer changes in trophic state and paleosalinities, which were closely related to Holocene relative sea level variation. Higher trophic states were observed during regressive events, most probably due to increases in runoff and erosion as regressions progressed. Diatom Association Zones (DAZ) were identified in both cores. Those DAZ corresponding to transgressive events were dominated by marine/brackish taxa and relatively low organic matter and nutrient values, while those DAZ corresponding to regressive events showed increases in brackish/freshwater diatoms and both organic matter and nutrients. Although the lagoon formed after the first Holocene marine transgression, our data indicate the existence of a marine/brackish aquatic system during upper Pleistocene (i.e., before 15,000 yr BP), but by similar to20,000 yr BP, the system was still likely to be a semi-arid terrestrial system MH - Germany MH - Mexico|Baja California Sur MH - Uruguay PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 8 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Limnology U5 - J;Article AV - English IS - 0921-2728 UR - ISI:000221687100001 L2 - diatoms;Holocene;paleolimnology;salinity;sea level change;trophic state;upper Pleistocene;Uruguay;ORGANIC-MATTER; LAKE-SEDIMENTS; RATIOS; BARRIER; BRAZIL; BLANCA; PLAINS; COAST SO - Journal of Paleolimnology 2004 ;32(2):117-135 10866 UI - 4887 AU - Garcia-Rojas J AU - Esteban C AU - Peimbert M AU - Rodriguez M AU - Ruiz MT AU - Peimbert A AD - Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Chile, Dept Astron, Santiago, ChileGarcia-Rojas, J, Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain TI - Chemical abundances of the Galactic HII region NGC 3576 derived from very large telescope echelle spectrophotometry AB - We present echelle spectrophotometry of the Galactic H II region NGC 3576. The data have been taken with the VLT UVES echelle spectrograph in the 3100 - 10400 Angstrom range. We have measured the intensities of 458 emission lines, 344 are permitted lines of H-0, He-0, C+, N-0, N+, N++, O-0, O+, Ne+, S++, Si-0, Si+, Ar-0, and Ar+; some of them are produced by recombination and others mainly by fluorescence. Electron temperatures and densities have been determined using different continuum and line intensity ratios. We have derived He+, C++, O+, O++, and Ne++ ionic abundances from pure recombination lines. We have also derived abundances from collisionally excited lines for a large number of ions of different elements. Remarkably consistent estimations of t(2) have been obtained by comparing Balmer and Paschen with [O III] temperatures, and O++ and Ne++ ionic abundances obtained from collisionally excited and recombination lines. The chemical composition of NGC 3576 is compared with those of other Galactic H II regions and with the one from the Sun. A first approach to the gas-phase Galactic radial abundance gradient of C as well as of the C/O ratio has been made MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000222850300006 L2 - ISM : abundances;ISM : individual (NGC 3576);HII regions;line : identification;H-II REGIONS; OPTICAL RECOMBINATION LINES; FAINT EMISSION-LINES; EXCITATION COLLISION STRENGTHS; PRIMORDIAL HELIUM ABUNDANCE; ORION-NEBULA; PLANETARY-NEBULA; TEMPERATURE-FLUCTUATIONS; ATOMIC DATA; GASEOUS NEBULAE SO - Astrophysical Journal Supplement Series 2004 ;153(2):501-522 10867 UI - 4871 AU - Garcia-Romo GS AU - Pedroza-Gonzalez A AU - guilar-Leon D AU - Orozco-Estevez H AU - Lambrecht BN AU - Estrada-Garcia I AU - Flores-Romo L AU - Hernandez-Pando R AD - CINVESTAV, IPN, Ctr Adv Res, Dept Expt Pathol, Mexico City 07360, DF, MexicoNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Expt Pathol, Mexico City, DF, MexicoErasmus Univ, Dept Pulm Med, Rotterdam, NetherlandsENCB IPN, Natl Sch Biol Sci, Dept Immunol, Mexico City, DF, MexicoFlores-Romo, L, CINVESTAV, IPN, Ctr Adv Res, Dept Expt Pathol, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - Airways infection with virulent Mycobacterium tuberculosis delays the influx of dendritic cells and the expression of costimulatory molecules in mediastinal lymph nodes AB - Despite tuberculosis resurgence and extensive dendritic cell (DC) research, there are no in vivo studies evaluating DC within regional lymphoid tissue during airways infection with virulent Mycobacterium tuberculosis (Mtb) H37Rv. Using DC-specific antibodies, immunocytochemistry, flow cytometry and Ziehl-Neelsen (ZN) for bacilli staining, we searched for Mtb and DC changes within mediastinal lymph nodes, after intratracheal (ITT) inoculation of virulent Mtb. ZN and immunocytochemistry in frozen and paraffin sections of mediastinal lymph nodes identified Mtb until day 14 after ITT inoculation, associated with CD11c(+) and Dec205(+) DC. Analysing CD11c, MHC-CII, and Dec205 combinations by flow cytometry in MLN suspensions revealed that CD11c(+)/MHC-CII+ and CD11c(+)/Dec205(+) DC did not increase until day 14, peaked on day 21, and sharply declined by day 28. No changes were seen in control, saline-inoculated animals. The costimulatory molecules evaluated in CD11c(+) DCs followed a similar trend; the CD80 increase was negligible, slightly surpassed by CD40. CD86 increased earlier and the three markers peaked at day 21, declining by day 28. While antigen-specific proliferation was not evident for MLN CD4(+) T cells at 2 weeks postinfection, delayed-type hypersensitivity responses upon ITT inoculation revealed that, as early as day 3 and 7, both the priming and peripheral systemic immune responses were clearly established, persisting until days 14-21. While airways infection with virulent Mtb triggers an early, systemic peripheral response maintained for three weeks, this seems dissociated from regional events within mediastinal lymph nodes, such as antigen-specific T-cell reactivity and a delay in the influx and local activation of DC MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Immunology U5 - J;Article AV - English IS - 0019-2805 UR - ISI:000222801700018 L2 - virulent Mycobacterium tuberculosis;dendritic cells in vivo;mediastinal lymph nodes;EXPERIMENTAL PULMONARY TUBERCULOSIS; INFLAMMATORY RESPONSE; CONDUCTING AIRWAYS; NITRIC-OXIDE; ANTIGEN; MICE; LUNG; EPITHELIUM; ACTIVATION; PATHOLOGY SO - Immunology 2004 ;112(4):661-668 10868 UI - 4644 AU - Garcia-Valladares O AU - Perez-Segarra CD AU - Rigola J AD - Univ Nacl Autonoma Mexico, CIE, Temixco 62580, Morelos, MexicoUniv Politecn Catalunya, ETSEIT, Lab Termotecn & Energet, CTTC, Terrassa 08222, SpainGarcia-Valladares, O, Univ Nacl Autonoma Mexico, CIE, Privada Xochicalco S-N, Temixco 62580, Morelos, Mexico TI - Numerical simulation of double-pipe condensers and evaporators AB - A detailed one-dimensional steady and transient numerical simulation of the thermal and fluid-dynamic behaviour of double-pipe heat exchangers (evaporators and condensers) has been carried out. The governing equations (continuity, momentum and energy) inside the internal tube and the annulus, together with the energy equation in the internal tube wall, external tube wall and insulation, are solved iteratively in a segregated manner. The discretized governing equations in the zones with fluid flow are efficiently coupled using an implicit step by step method. This formulation requires the use of empirical correlations for the evaluation of convective heat transfer, shear stress and void fraction. An implicit central difference numerical scheme and a line-by-line solver was used in the internal and external tube walls and insulation. A special treatment has been implemented in order to consider transitions (single-phase/two-phase, dry-out,...). All the flow variables (enthalpies, temperatures, pressures, mass fractions, velocities, heat fluxes....) together with the thermophysical properties are evaluated at each point of the grid in which the domain is discretized. Different numerical aspects and comparisons with analytical and experimental results are presented in order to verify and validate the model. (C) 2004 Elsevier Ltd and IIR. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Engineering, Mechanical U5 - J;Article AV - English IS - 0140-7007 UR - ISI:000223397400010 L2 - modelling;heat transfer;steady state;transient behaviour;evaporator;annulus;HORIZONTAL SMOOTH TUBE; BOILING HEAT-TRANSFER; EXPANSION DEVICES BEHAVIOR; 3 HFC REFRIGERANTS; RATE STEP CHANGE; MIXED REFRIGERANTS; PART II; TRANSFER COEFFICIENTS; METASTABLE REGION; FLOW SO - International Journal of Refrigeration-Revue Internationale du Froid 2004 ;27(6):656-670 10869 UI - 3798 AU - Garcia-Villanova RJ AU - Cordon C AU - Paramas AMG AU - Aparicio P AU - Rosales MEG AD - Univ Salamanca, Fac Farm, Dept Quim Analit Nutr & Bromatol, E-37007 Salamanca, SpainCtr Estudios Tecnol Ind & Serv, Tabasco, MexicoGarcia-Villanova, RJ, Univ Salamanca, Fac Farm, Dept Quim Analit Nutr & Bromatol, Campus Miguel Unamuno, E-37007 Salamanca, Spain TI - Simultaneous immunoaffinity column cleanup and HPLC analysis of aflatoxins and ochratoxin A in Spanish bee pollen AB - Bee pollen is a major substrate for mycotoxins growth when no prompt and adequate drying is performed by the beekeeper after collection by bees. Regulatory limits for aflatoxins and ochratoxin A are currently in force in the European Union for a rising list of foodstuffs, but not for this. An immunoaffinity column cleanup process has been applied prior to the analysis of aflatoxins B-1, B-2, G(1), and G(2) and ochratoxin A (OTA). Optimization of the HPLC conditions has envolved both a gradient elution and a wavelength program for the separation and fluorimetric quantitation of all five mycotoxins at their maximum oxcitation and emission values of wavelength in a single run. The higher limit of detection (mug/kg) was 0.49 for OTA and 0.20 for aflatoxin B-1. Repeatability (RSDr) at the lower limit tested ranged from 9.85% for OTA to 6.23% for aflatoxin G2, and recoveries also at the lower spiked level were 73% for OTA and 81% for aflatoxin B-1. None of the 20 samples assayed showed quantifiable values for the five mycotoxins MH - Mexico|Tabasco MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000225358900007 L2 - mycotoxins;aflatoxins;ochratoxin A;spanish bee pollen;immunoaffinity column;simultaneous food analysis;LIQUID-CHROMATOGRAPHIC DETERMINATION; THIN-LAYER-CHROMATOGRAPHY; POSTCOLUMN DERIVATIZATION; FLUORESCENCE DETECTION; ROASTED COFFEE; PEANUT BUTTER; GREEN COFFEE; BABY FOOD; ZEARALENONE; BARLEY SO - Journal of Agricultural and Food Chemistry 2004 ;52(24):7235-7239 10870 UI - 6029 AU - Garcia AA AU - Garcia-Quiroz A AU - Cataldo M AU - del Campo S AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Bio Bio, Fac Ciencias, Dept Fis, Concepcion, ChilePontificia Univ Catolica Valparaiso, Fac Ciencias Basicas & Matemat, Inst Fis, Valparaiso, ChileGarcia, AA, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Correspondence between n- and m-dimensional inflationary cosmologies AB - It is shown that, from any n-dimensional Friedmann-Robertson-Walker (FRW) cosmology determined for a single scalar field minimally coupled to gravity, one can construct its m-dimensional counterpart, under the assumption of a common time coordinate and a structurally invariant scale factor for both spacetimes, by means of a simple algebraic correspondence relating gravitational constants and scalar field structural functions. If the considered cosmologies are supplemented with a perfect fluid, fitting a wide class of state equations of the form p+rho=gammaf(rho), then any n-dimensional FRW cosmology, coupled to a perfect fluid and a scalar field, possesses an m-dimensional counterpart, and vice versa. In particular, these assertions hold for single scalar field inflation models. A theorem on this respect is demonstrated. Various families of solutions are explicitly given and exhibit their correspondence with 3+1 cosmological spacetimes MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000220092300002 SO - Physical Review D 2004 ;69(4): 10871 UI - 6062 AU - Garcia AA AU - Hehl FW AU - Heinicke C AU - Macias A AD - IPN, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoUniv Cologne, Inst Theoret Phys, D-50923 Cologne, GermanyUniv Missouri, Dept Phys & Astron, Columbia, MO 65211, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoGarcia, AA, IPN, CINVESTAV, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - The Cotton tensor in Riemannian spacetimes AB - Recently, the study of three-dimensional spaces is becoming of great interest. In these dimensions the Cotton tensor is prominent as the substitute for the Weyl tensor. It is conformally invariant and its vanishing is equivalent to conformal flatness. However, the Cotton tensor arises in the context of the Bianchi identities and is present in any dimension n. We present a systematic derivation of the Cotton tensor. We perform its irreducible decomposition and determine its number of independent components as n(n(2) - 4)/3 for the first time. Subsequently, we show its characteristic properties and perform a classification of the Cotton tensor in three dimensions. We investigate some solutions of Einstein's field equations in three dimensions and of the topologically massive gravity model of Deser, Jackiw and Templeton. For each class examples are given. Finally, we investigate the relation between the Cotton tensor and the energy-momentum in Einstein's theory and derive a conformally flat perfect fluid solution of Einstein's field equations in three dimensions MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000220124500029 L2 - TOPOLOGICALLY MASSIVE GRAVITY; GRAVITATIONAL COLLAPSE; GAUGE-THEORY; CONSTANT; FIELD; TIMES SO - Classical and Quantum Gravity 2004 ;21(4):1099-1118 10872 UI - 1966 AU - Garcia AJ AU - Angulo E AU - Blackall PJ AU - Ortiz AM AD - Anim Res Inst, Dept Primary Ind, Agcy Food & Fibre Sci, Yeerongpilly, Qld 4105, AustraliaLabs Avilab, Tepatitlan 47600, Jalisco, MexicoUNAM, Fac Estudios Super Cuautitlan, Cuautitlan 54740, MexicoBlackall, PJ, Anim Res Inst, Dept Primary Ind, Agcy Food & Fibre Sci, Yeerongpilly, Qld 4105, Australia TI - The presence of nicotinamide adenine dinucleotide-independent Haemophilus paragallinarum in Mexico AB - Two isolates of Haemophilus paragallinarum were obtained from a layer chicken in Mexico. The isolates were confirmed as H. paragallinarum by polymerase chain reaction and conventional biochemical identification. The isolates were nicotinamide adenine dinucleotide (NAD) independent-growing on blood agar without the need of a nurse colony as well as on a complex medium that lacked both NAD and chicken serum. Both isolates were pathogenic, causing the typical clinical signs of infectious coryza in susceptible chickens. One isolate was Page serovar B/Kume serovar B-1 and the other isolate was Page serovar C/Kume serovar C-2. The isolates were associated with a field outbreak that involved an egg drop of 20% over a 3-wk period and a doubling of weekly mortality (from 0.1% to 0.2%). This is the first report of NAD-independent H. paragallinarum outside South Africa and is the first time that NAD-independent H. paragallinarum of serovar B has been reported MH - Australia MH - Mexico|Estado De Mexico MH - Mexico|Jalisco PB - ATHENS: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000229917100024 L2 - H. paragallinarum;nicotinamide adenine dinucleotide;INFECTIOUS CORYZA; NAD INDEPENDENCE; COMMERCIAL CHICKENS; METABOLISM; PARAINFLUENZAE; IDENTIFICATION; STRAINS; VACCINE; SEROVAR; SCHEME SO - Avian Diseases 2004 ;48(2):425-429 10873 UI - 3132 AU - Garcia CA AU - Quiroz-Mercado H AU - Uwaydat S AU - Sepulveda-Flores R AU - Meza-de Regil A AU - Holroyd K AU - Desai A AU - Solis S AU - Estrada L AU - Peyman G AD - Univ Texas, Hlth Sci Ctr, Houston, TX, USAHosp Evitar Ciguera Mexico Dr Luis Sanchez Bulnes, Mexico City, DF, MexicoGenaera, Plymouth Meeting, PA, USATulane Univ, Hlth Sci Ctr, New Orleans, LA 70118, USA TI - A phase I/II trial of intravenous squalamine lactate for treatment of choroidal Neovascularization in age related macular degeneration (ARMD) MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338002296 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U924-U924 10874 UI - 5087 AU - Garcia D AU - Singh SK AU - Herraiz M AU - Pacheco JF AU - Ordaz M AD - Univ Complutense Madrid, Fac Ciencias Fis, Dept Geofis & Meteorol, E-28040 Madrid, SpainNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoGarcia, D, Univ Complutense Madrid, Fac Ciencias Fis, Dept Geofis & Meteorol, Ciudad Univ, E-28040 Madrid, Spain TI - Inslab earthquakes of Central Mexico: Q, source spectra, and stress drop AB - We analyze 17 intermediate-depth, normal-faulting, inslab earthquakes of Mexico (4.1 less than or equal to M-w less than or equal to 7.4; 35 km less than or equal to H less than or equal to 118 km), recorded on hard sites at local and regional distances (R :! 600 km), to study spectral attenuation of seismic waves, quality factor Q, source spectra, and Brune stress drop. Assuming l/R geometrical spreading, the quality factor is given by Q(f) = 251f(0.58). Although there is considerable uncertainty in Q due to the trade-off between geometrical spreading and Q, this uncertainty does not influence strongly the estimation of source spectra and stress drops. We find that source spectra of nine events (4.1 less than or equal to M-w less than or equal to 6.4) follow the omega(2) model, while those of the other eight (5.8 less than or equal to M-w less than or equal to 7.4) significantly deviate from it. Interpreting the high-frequency level of the source spectra with the omega(2) model yields a nearly constant stress drop, Deltasigma, with a median value of 304 bars. This is more than 4 times greater than the corresponding value for interplate earthquakes in central Mexico. The observed source acceleration spectra, S(f), is, however, better fit by an empirical source spectrum characterized by two corner frequencies, fa and f(b), such that S(f) = f(2)M(0)/[{1 + (f/f(a))(2)). {1 + (f/f(b))(2)}](1/2), where f(a) = 4.962 X 10(10)/M-0(0.454), f(b) = 4.804 X 10(5)/M-0(0.213), and M-0 is in dyne centimeters. This empirical source spectrum may be useful in predicting ground-motion parameters using stochastic methods MH - Mexico|Distrito Federal MH - Spain PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000222417800003 L2 - SUBDUCTION-ZONE EARTHQUAKES; GROUND-MOTION RELATIONS; DEEP EARTHQUAKES; WAVE-PROPAGATION; NORTH-AMERICA; COCOS PLATE; ACCELERATION; ATTENUATION; CITY; RADIATION SO - Bulletin of the Seismological Society of America 2004 ;94(3):789-802 10875 UI - 5846 AU - Garcia D AU - Ortiz-Pulido R AD - Univ Oviedo, Dept Biol Organismol & Sistemas, E-33071 Oviedo, SpainUniv Autonoma Estado de Hidalgo, Ctr Invest Biol, Pachuca 42001, Hidalgo, MexicoGarcia, D, Univ Oviedo, Dept Biol Organismol & Sistemas, C Rodrigo Uria S-N, E-33071 Oviedo, Spain TI - Patterns of resource tracking by avian frugivores at multiple spatial scales: two case studies on discordance among scales AB - Scaling is relevant for the analysis of plant-frugivore interaction, since the ecological and evolutionary outcomes of seed dispersal depend on the spatial and temporal scale at which frugivory patterns emerge. We analyse the relationship between fruit abundance and frugivore activity at local and landscape spatial scales in two different systems composed, respectively, by the bird-dispersed woody plants Juniperus communis and Bursera fagaroides, and their frugivore assemblages. We use a hierarchical approach of nested patchiness of fruit-resource, where patches are defined by individual plants within site, at the local scale, and by sites within region, at the landscape scale. The structure of patches is also described in terms of contrast (differences in fruit availability among patches) and aggregation (spatial distribution of patches). For J. communis, frugivore activity was positively related to fruit availability at the landscape scale, this pattern seldom emerging at the local scale; conversely, B. fagaroides showed a general trend of positive local pattern that disappeared at the landscape scale. These particular trends might be partially explained by differences in contrast and aggregation. The strong contrast among plants within site together with a high aggregation among sites would promote the B. fagaroides pattern to be only local, whereas in J. communis, low aggregation among sites within region would favour a sharp landscape-scale pattern. Both systems showed discordant patterns of fruit-resource tracking among consecutive spatial scales, but the sense of discordance differed among systems. These results, and the available multi-scale frugivory data, suggest that discordance among successive scales allows to link directly frugivory patterns to resource-tracking mechanisms acting at particular scales, resulting, thus, more informative than concordance observational data, in which landscape patterns might result from accumulated effect of local mechanisms. In this context, we propose new methodological approaches for a better understanding of the hierarchical behavioural mechanisms underpinning the multi-scale resource tracking by frugivores MH - Mexico|Hidalgo MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 18 U4 - Ecology U5 - J;Article AV - English IS - 0906-7590 UR - ISI:000220549600007 L2 - SEED DISPERSAL; FRUIT REMOVAL; TEMPORAL VARIATION; BIRD ABUNDANCE; CROP SIZE; ECOLOGY; PREY; DETERMINANTS; EVOLUTIONARY; RECRUITMENT SO - Ecography 2004 ;27(2):187-196 10876 UI - 4652 AU - Garcia G AU - Gomez A AU - Lopez U AU - Vargas H AU - Horwath WR AD - IRENAT, Colegio Postgrad, Programa Forestal, Montecillo 56230, MexicoUniv Calif Davis, Dept Land Air & Water Resources, Soils & Biogeochem Sect, Davis, CA 95616, USAGomez, A, IRENAT, Colegio Postgrad, Programa Forestal, Km 36-5,Carr Mex Texcoco, Montecillo 56230, Mexico TI - Tree growth and delta C-13 among populations of Pinus greggii Engelm. at two contrasting sites in central Mexico AB - Basal area growth and carbon isotopic composition (delta(13)C) of three Pinus greggii Engelm. populations were correlated to climate variables at two contrasting common garden sites. The populations were Molango (MO), Pinon (PI) and Zimapan (ZI), all native to the state of Hidalgo. The test sites included a low-precipitation (800 mm) and high-elevation site (2600 masl) at Metepec, Mexico (ME), and a high-precipitation (1833 mm) and low-elevation site (1440 masl) at Huauchinango, Puebla (HU). The MO population had the highest variation in productivity with 15 m(3) ha(-1) per year at the HU site and 7.7 m(3) ha(-1)per year at the ME site. The PI population had the best tree growth at the ME site with an estimated production of 11 m(3) ha(-1) per year. Trees at the ME site showed an average elevated delta(13)C content of 2.67parts per thousand compared to the HU site. Differences between sites in delta(13)C were explained by differences in precipitation and altitude, which influenced water status and gas exchange processes in the different populations. Changes in soil water potential during the dry season matched differences in delta(13)C observed at both test sites. At the site level, significant correlation between 613 C and mean annual temperature were observed only at the HU plantation. Correlations for the HU site significantly improved when temperatures of the driest period of the year were considered. No significant correlation between delta(13)C and annual precipitation among populations was found at the two sites. Correlation between VC and basal area increment during a 5-year period was significant in MO and PI populations at the ME site, with correlations of r = -0.42 (P = 0.04) and r = -0.40 (P = 0.05), respectively. At the HU site only the PI population showed significant correlation between 613 C and basal increment (r = -0.43; P = 0.03). Differences in wood VC were consistently detected for the two contrasting environments. The results indicate that the wood 13(, signature provides a good integral index for screening R greggii Engelm. population adaptation for dry sites. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000223410500017 L2 - C-13/C-12;subtropical pines;Mexican pines;water use efficiency;forest plantations;WATER-USE EFFICIENCY; CARBON-ISOTOPE FRACTIONATION; GAS-EXCHANGE; WOOD DELTA-C-13; RINGS; C-13/C-12; DROUGHT; RADIATA SO - Forest Ecology and Management 2004 ;198(1-3):237-247 10877 UI - 5008 AU - Garcia G AU - Santiso J AU - Pardo JA AU - Figueras A AD - CSIC, ICMAB, Lab Crystal Growth, Bellaterra 08193, SpainInst Fis, Juriquilla 76230, Queretaro, MexicoGarcia, G, CSIC, ICMAB, Lab Crystal Growth, Campus UAB, Bellaterra 08193, Spain TI - Epitaxial growth of YSZ films prepared by pulsed injection MOCVD AB - Epitaxial yttria-stabilised zirconia films have been prepared on (1 - 1,0,2) sapphire substrates by pulsed injection MOCVD. The structure and the degree of in-plane and out-of-plane texture of the layers has been characterised by X-ray diffraction as a function of deposition temperature and film thickness. The layers have been found to be preferentially <0 0 1> oriented with a high degree of epitaxy, but the residual presence of <1 1 1> oriented grains has been discussed and correlated to the layers characteristics. The surface morphology and roughness have been characterised by the AFM tapping mode method. The thickness of the layers in the nanometer scale has been determined by the grazing angle X-ray reflectivity. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Queretaro MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000222497700025 L2 - MOCVD;epitaxial film;YSZ;sapphire;XRD;AFM;YTTRIA-STABILIZED ZIRCONIA; THERMAL BARRIER COATINGS; THIN-FILMS; BUFFER LAYERS; SAPPHIRE; YBCO SO - Applied Surface Science 2004 ;233(1-4):191-196 10878 UI - 5473 AU - Garcia G AU - Caro J AU - Santiso J AU - Pardo JA AU - Figueras A AU - Abrutis A AD - CSIC, ICMAB, Lab Crecimiento Cristalino, Bellaterra 08193, SpainInst Fis, Queretaro 76230, MexicoVilnius State Univ, Dep Quim Gen & Inorgan, LT-2006 Vilnius, LithuaniaGarcia, G, CSIC, ICMAB, Lab Crecimiento Cristalino, Campus UAB, Bellaterra 08193, Spain TI - Thin film growth of ionic conducting membranes by PIMOCVD AB - In this work, we describe the preparation of YSZ layers on porous and non-porous substrates using the Pulsed Injection MOCVD technique for solid electrolyte applications. In this technique, the vapour phase is obtained by injecting micro-droplets of the desired solution delivered from a container kept at room temperature into a heated evaporator connected to a deposition chamber. The droplet characteristics, volume, precursor concentration and injection frequency will control and determine the thickness and the microstructure of the layers. The system offers a high degree of repeatability of the liquid volume injected and thus a high reproducibility of the layers from low to high growth rates. This process has been optimised in order to obtain dense YSZ membranes to be used as solid electrolytes in SOFC, oxygen generators and oxygen sensors. Future work will consist in the preparation of anode-electrolyte-cathode multilayered devices. For this purpose, experimental parameters have been studied and optimised in order to obtain thin YSZ membranes on dense and porous substrates MH - Lithuania MH - Mexico|Queretaro MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000221517900085 L2 - MOCVD;YSZ;yttria stabilised zirconia;thin film;ionic conductor;CHEMICAL-VAPOR-DEPOSITION; OXIDE FUEL-CELLS; ZIRCONIA; MOCVD; FABRICATION; MECHANISM; CVD SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(2):448-451 10879 UI - 4747 AU - Garcia JJ AU - Arevalo A AU - Brunkan NM AU - Jones WD AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Rochester, Dept Chem, Rochester, NY 14627, USAGarcia, JJ, Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Cleavage of carbon-carbon bonds in alkyl cyanides using nickel(0) AB - The reaction of the complex [(dippe)NiH](2) (1) with a variety of alkyl cyanides afforded nickel(0) compounds of the type [(dippe)Ni(eta(2)-RCN)], where R, = Me, Et, Pr, Pr-i, Bu-t, cyclopropyl, cyclobutyl, adamantyl (2-9, respectively). When compounds 2-9 were warmed to yield oxidative addition products, the thermal reaction proceeded only in the case of 2 to produce [(dippe)Ni(Me)(CN)](10). Photochemical activation did produce oxidative addition products from compounds 2-8, which rapidly evolved to the beta-elimination products of the organic moiety in most cases and to the formation of [(dippe)Ni(CN)(2)] (11). Reaction of 1 with acetonitrile in the presence of BPh3 gives [(dippe)Ni(eta(2)-MeCNBPh3)](12), which does not undergo thermal C-CN cleavage upon heating. X-ray crystal structures are reported for 10-12 MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 30 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000222950800033 L2 - C-C; OXIDATIVE ADDITION; UNUSUAL REACTIVITY; LEWIS-ACIDS; COMPLEXES; ACTIVATION; ARYL; RUTHENIUM; NITRILES; PLATINUM SO - Organometallics 2004 ;23(16):3997-4002 10880 UI - 5206 AU - Garcia JRG AU - Bohlander SK AU - Angulo MG AU - Flores MAE AU - Cardenas VJP AU - Espinoza JPM AU - Madrigal MDA AU - Rivera H AD - Ctr Med Nacl Occidente, Lab Citogenet, CIBO, IMSS, Guadalajara, Jalisco, MexicoKlinikum Grosshadern, Med Klin & Poliklin 3, Clin Cooperat Grp leukemia, GSF, D-81377 Munich, GermanyUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoHosp Pediat, Dept Hematol, CMNO, IMSS, Guadalajara, Jalisco, MexicoGarcia, JRG, Ctr Med Nacl Occidente, Lab Citogenet, CIBO, IMSS, Sierra MOjada 800,Colonia Independencia,AP 1-3838, Guadalajara, Jalisco, Mexico TI - A t(1;9)(q23.3 similar to q25;q34) affecting the ABL1 gene in a biphenotypic leukemia AB - Recurring chromosome translocations, which are found in leukemia, can result in the inappropriate expression of oncogenes or in the formation of chimeric genes that code for structurally and functionally abnormal proteins. The chromosomal t(1;9)(q23.3similar toq25;q34) was found in a patient with biphenotypic leukemia. Flourescence in situ hybridization (FISH) analysis revealed that the break on chromosome 9 occurred in the ABL1 gene. The breakpoint on chromosome 1 occurred distal tot he PBX1 gene at the 1q23.3, as shown by FISH using BAC RP11-503N16 and RP11-403P14, which flank the PBX1 locus; hence, the ABL1 gene can be fused with another gene distal to PBX1 gene. (C) 2004 Elsevier Inc. All right reserved MH - Germany MH - Mexico|Jalisco PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Oncology;Genetics & Heredity U5 - J;Article AV - English IS - 0165-4608 UR - ISI:000222200100014 L2 - ACUTE MYELOID-LEUKEMIA; FUSION; REARRANGEMENT; TEL SO - Cancer Genetics and Cytogenetics 2004 ;152(1):81-83 10881 UI - 4580 AU - Garcia MG AU - Cordero G AU - Mucino P AU - Salinas V AU - Fernandez LA AU - Christensen RD AD - Inst Nacl Perinatol, Mexico City, DF, MexicoUniv S Florida, San Petersburg, FL, USA TI - Intravenous immunoglobulin (IVIG) administration as a treatment for Rh hemolytic jaundice in Mexico city MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591102681 SO - Pediatric Research 2004 ;55(4):461A-461A 10882 UI - 3962 AU - Garcia ML AU - Masson M AD - UAEN UAZ, Zacatecas 98000, MexicoCAPSUM Technol GMBH, D-22946 Trittau, GermanyGarcia, ML, UAEN UAZ, Cpires 10 Fracc Penuela, Zacatecas 98000, Mexico TI - Environmental and geologic application of solid-state methane sensors AB - The analysis of methane concentration in natural systems, such as soil, water and atmosphere, is becoming an important and delicate task for environmental research. (1)The characterization of the spatial and temporal variability of these emissions is an important and urgent target for greenhouse-gas and global change studies. In this respect a series of technical specifications are demanded by the scientific community, including sensor portability, low detection limit and the need of analyzing small volumes of gas. Solid-state gas sensors are increasingly used for environmental measurements. A metal oxide semiconductor (e.g., SnO2, ZnO2,) is used to fabricate chemical sensors for several gases, in particular methane. The potential of this technique is based on the low conductivity of the material in clean air, which increases with the methane gas concentration in the air. Sensitivity, selectivity, power consumption, long-term stability, and reaction time are all linked together. They all depend on the physico-chemical and geometrical structure of the sensitive layer. This means that improving one parameter has an influence on the others. Therefore, it is necessary to make compromises and select the combination of performances that best meet the application requirements MH - Germany MH - Mexico|Zacatecas PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 0943-0105 UR - ISI:000225048400010 L2 - methane measurements;solid-state gas sensors;SnO2;GAS SENSORS; LASER SO - Environmental Geology 2004 ;46(8):1059-1063 10883 UI - 4898 AU - Garcia T AU - de Posada E AU - Diamant R AU - Pena JL AD - Univ Nacl Autonoma Mexico, CCADET, Mexico City 04510, DF, MexicoUniv La Habana, IMRE, Havana 10400, CubaUAM, Unidad Iztapalapa, Mexico City, DF, MexicoCINVESTAV, IPN, Dept Fis Aplicada, Merida 97310, Yuc, MexicoGarcia, T, Univ Nacl Autonoma Mexico, CCADET, AP 70-186, Mexico City 04510, DF, Mexico TI - Textured thin films grown at room temperature by laser ablation AB - Thin films of SrFe12O19, BaFe12O19, Pb0.76La0.16 square(0.08)Zr(0.53)Ti(0.47)O(3)and Sr0.3Ba0.7Nb2O6 were grown on monocrystalline silicon substrates by pulsed laser deposition using a 20-ns Nd : YAG laser (1064 nm). The deposited thin films were analyzed by X-ray diffraction in the grazing incidence configuration. The analysis showed evidence of textured growth even though the films were grown at room temperature. Emission spectroscopy was used to establish the time of flight of the species within the plasma plume. Velocities of the order of 10(6) cm/s were obtained. The high kinetic energy of the species is thought to be responsible for the film texture, as it is released in the substrate-film system, favoring a preferential growth. For all the ablated ceramics, singly ionized species were shown to expand at higher velocities than neutrals. For ions, no consistency in the mass-speed relation was obtained, suggesting both the presence of electric fields during the plasma formation and an evaporation of the target that depends on the vapor pressure of the elements. In this way species that are firstly evaporated will be attracted strongly by fast electrons, allowing heavy ions to acquire higher velocities than lighter ones MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000222766100049 L2 - ELECTRON-EMISSION; TARGETS SO - Applied Physics A-Materials Science & Processing 2004 ;79(4-6):919-921 10884 UI - 4026 AU - Garciadiego-Cazares D AU - Rosales C AU - Katoh M AU - Chimal-Monroy J AD - Univ Nacl Autonoma Mexico, Dept Biol Celular & Fisiol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Inmunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Genet & Cell Biol Sect, Natl Canc Ctr, Inst Res,Chuo Ku, Tokyo 1040045, JapanChimal-Monroy, J, Univ Nacl Autonoma Mexico, Dept Biol Celular & Fisiol, Inst Invest Biomed, Mexico City 04510, DF, Mexico TI - Coordination of chondrocyte differentiation and joint formation by alpha 5 beta 1 integrin in the developing appendicular skeleton AB - The control point by which chondrocytes take the decision between the cartilage differentiation program or the joint formation program is unknown. Here, we have investigated the effect of alpha5beta1 integrin inhibitors and bone morphogenetic protein (BMP) on joint formation. Blocking of alpha5beta1 integrin by specific antibodies or RGD peptide (arginine-glycine-aspartic acid) induced inhibition of prehypertrophic chondrocyte differentiation and ectopic joint formation between proliferating chondrocytes and hypertrophic chondrocytes. Ectopic joint expressed Wnt14, Gdf5, chordin, autotaxin, type I collagen and CD44, while expression of Indian hedgehog and type II collagen was downregulated in cartilage. Expression of these interzone markers confirmed that the new structure is a new joint being formed. In the presence of BMP7, inhibition of alpha5beta1 integrin function still induced the formation of the ectopic joint between proliferating chondrocytes and hypertrophic chondrocytes. By contrast, misexpression of alpha5beta1 integrin resulted in fusion of joints and formation of prehypertrophic chondrocytes. These facts indicate that the decision of which cell fate to make pre-joint or prehypertrophic is made on the basis of the presence or absence of alpha5beta1 integrin on chondrocytes MH - Japan MH - Mexico|Distrito Federal PB - CAMBRIDGE: COMPANY OF BIOLOGISTS LTD RP - NOT IN FILE U3 - TC 42 U4 - Developmental Biology U5 - J;Article AV - English IS - 0950-1991 UR - ISI:000224723400009 L2 - joint formation;integrin;hedgehog;BMP;Wnt14;chondrogenesis;chondrocyte differentiation;mouse;CELL-ADHESION RECEPTORS; HORMONE-RELATED PEPTIDE; ENDOCHONDRAL BONE; INDIAN HEDGEHOG; EXTRACELLULAR-MATRIX; SIGNAL-TRANSDUCTION; PARATHYROID-HORMONE; CHICK LIMB; EXPRESSION; MICE SO - Development 2004 ;131(19):4735-4742 10885 UI - 6009 AU - Gardea-Torresdey JL AU - Peralta-Videa JR AU - Montes M AU - de la Rosa G AU - Corral-Diaz B AD - Univ Texas, Expt Sci & Engn PhD Program, El Paso, TX 79968, USAUniv Texas, Dept Chem, El Paso, TX 79968, USANatl Inst Forestry, Juarez Valley Expt Stn, Chihuahua 32780, MexicoGardea-Torresdey, JL, Univ Texas, Expt Sci & Engn PhD Program, El Paso, TX 79968 USA TI - Bioaccumulation of cadmium, chromium and copper by Convolvulus arvensis L.: impact on plant growth and uptake of nutritional elements AB - The remediation of heavy metal-contaminated sites using plants presents a promising alternative to current methodologies. in this study, the potential accumulation of Convolvulus arvensis L. for Cd(II), Cr(VI), and Cu(II) was determined using an agar-based medium. The shoots of C. arvensis plants exposed to 20 mg l(-1) of these heavy metals, demonstrated capability to accumulate more than 3800 mg of Cr, 1500 mg of Cd, and 560 mg of Cu per kg of dry tissue. The outcome of this study and the field data previously reported corroborate that C arvensis is a suitable candidate for the phytoremediation of Cd(II), Cr(VI), and Cu(II) contaminated soils. Furthermore, the concentration of Cr determined in the dry leaf tissue (2100 mg kg(-1)) indicates that C. arvensis could be considered as a potential Cr-hyperaccumulator plant species. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Chihuahua MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 23 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000220277200002 L2 - phytoremediation;heavy metals;field bindweed;PHASEOLUS-VULGARIS L; NITRATE REDUCTASE-ACTIVITY; CONTAMINATED SOIL; PROTEIN-CONTENT; HEAVY-METALS; ACCUMULATION; ZINC; PHYTOREMEDIATION; CHLOROPHYLL; TOXICITY SO - Bioresource Technology 2004 ;92(3):229-235 10886 UI - 6214 AU - Garfias-Vasquez FJ AU - Duverneuil P AU - Lacoste G AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoInst Natl Polytech Toulouse, Ecole Natl Super Ingenieurs Arts Chim & Technol, F-31077 Toulouse 04, FranceGarfias-Vasquez, FJ, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ, Mexico City 04510, DF, Mexico TI - Behaviour, modelling and simulation of a pulsed three-dimensional radial electrode with continuous solid flow: Part I AB - A new electrolysis cell, the radial PPPE, in which the solid cathode is able to circulate continuously through the cell by pulsation, is described. The behaviour of the liquid and solid phases is analysed to understand the operation of the cell and the effect of pulsation. Two distinct regions are observed in the solid cathode during the upward pulsation: a stable upper and a destabilized lower region. The circulation in the upper region, segregation in the lower region and exchange between the two regions are characterized experimentally as a function of the maximum fluidizing height bed. Electrodeposition occurs in both regions. The RTD of the solid particles was determined MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry U5 - J;Article AV - English IS - 0021-891X UR - ISI:000189014200009 L2 - electrochemical cell;pulsating flow;three-dimensional electrode;FLUIDIZED-BEDS; LIQUID; EXPANSION SO - Journal of Applied Electrochemistry 2004 ;34(4):417-426 10887 UI - 5116 AU - Garibay-Alonso R AU - Villasenor-Gonzalez P AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Toulouse 3, UMR 5626 CNRS, Phys Quant Lab, F-31062 Toulouse, FranceDorantes-Davila, J, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, Mexico TI - Calculation of the magnetic anisotropy energy and finite-temperature magnetic properties of transition-metal films AB - The magnetic anisotropy energy at the interface (IMAE) of Co films deposited on the Pd(111) surface are determined in the framework of a self-consistent, real-space tight-binding method at zero temperature. Significant spin moments are induced at the Pd atoms at the interface which have an important influence on the observed reorientation transitions as a function of Co film thickness. Film-substrate hybridizations are therefore crucial for the magneto-anisotropic behaviour of thin transition-metal films deposited on metallic non-magnetic substrates. Furthermore, using a real-space recursive expansion of the local Green function and within the virtual-crystal approximation we calculate the magnetization curves and the Curie temperature T-C for free-standing Fe films MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000222194000028 L2 - ITINERANT-ELECTRON SYSTEMS; SPIN FLUCTUATION THEORY; ULTRATHIN CO FILMS; NARROW BANDS; IRON; DEPENDENCE; PD(111); PD SO - Journal of Physics-Condensed Matter 2004 ;16(22):S2257-S2262 10888 UI - 4796 AU - Garnovskii AD AU - Kharisov BI AU - Anpilova EL AU - Bicherov AV AU - Korshunov OY AU - Burlov AS AU - Mendez-Rojas MA AU - Blanco LM AU - Borodkin GS AU - Uflyand IE AU - Mendez UO AD - Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas de los Garza 66450, NL, MexicoRostov State Univ, Inst Phys & Organ Chem, Rostov Na Donu 344006, RussiaRussian Acad Sci, So Sci Ctr, Rostov Na Donu 344006, RussiaUniv Americas, Puebla, MexicoKharisov, BI, Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, AP 18-F, San Nicolas de los Garza 66450, NL, Mexico TI - New beta-aminovinylketonates with annealated 1,2-benzothiazine-1,1-dioxide fragment AB - New beta-aminovinylketones with heterocyclic 1,2-benzothiazine-1,1-dioxide and antipyrine moieties (LH) and their 3d-metal (Co-II, Ni-II, Cu-II, Zn-II) chelates have been synthesized. Two types of chelates can be obtained based on the coordination of the LH ligand, depending when an available carbonyl (C=O) group of the antipyrine fragment is coordinated (M = Co, Ni) or not (M = Cu) to the metal center. The molecular structure of compound 5b was obtained by X-ray diffraction, indicating that the ligand 2b forces the complex to adopt a highly distorted tetracoordinate square planar structure. Details on the synthesis and characterization of these complexes are discussed. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - Mexico|Puebla MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000222977000008 L2 - METAL-COMPLEXES; COPPER(II); NICKEL(II); PIROXICAM; COORDINATION; COBALT(II); ADDUCTS; LIGANDS; DRUGS SO - Polyhedron 2004 ;23(11):1909-1914 10889 UI - 5805 AU - Garnovskii AD AU - Anpilova EL AU - Antsyshkina AS AU - Bicherov AV AU - Korshunov OY AU - Vasil'chenko IS AU - Uraev AI AU - Kharisov BI AU - Blanko LM AU - Sadikov GG AU - Burlov AS AU - Borodkin GS AU - Zaletov VG AU - Kharabaev NN AU - Uflyand IE AU - Sergienko VS AD - Rostov Don State Univ, Phys & Organ Chem Res Inst, Rostov Na Donu 344104, RussiaRostov State Pedagog Univ, Rostov Na Donu, RussiaRussian Acad Sci, NS Kurnakov Gen & Inorgan Chem Inst, Moscow 119991, RussiaUniv Autonoma Nuevo Leon, Monterrey, MexicoGarnovskii, AD, Rostov Don State Univ, Phys & Organ Chem Res Inst, Pr Stachki 194-3, Rostov Na Donu 344104, Russia TI - Metal complexes with novel ambidentate ligands: beta-enaminovinylketones with annelated 1,2-benzothiazine-1,1-dioxide fragment and antipyrine substituent AB - The data on competitive binding of ligands in metal complexes with ambidentate ligands (Schiff bases and beta-aminovinylketones) were summarized. Special attention is given to chemical and electrochemical syntheses and structural study of novel chelates of heterocyclic enaminoketones with antipyrine substituent that form tetrahedral (Cu2+, Zn2+) or octahedral (CO2+, Ni2+) structures MH - Mexico|Nuevo Leon MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1070-3284 UR - ISI:000220611400008 L2 - COPPER(II); COORDINATION; CRYSTAL SO - Russian Journal of Coordination Chemistry 2004 ;30(3):221-223 10890 UI - 3948 AU - Garrett TJ AU - Heymsfield AJ AU - Mcgill MJ AU - Ridley BA AU - Baumgardner DG AU - Bui TP AU - Webster CR AD - Univ Utah, Dept Meteorol, Salt Lake City, UT 84112, USANatl Ctr Atmospher Res, Boulder, CO 80307, USANASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City, DF, MexicoNASA, Ames Res Ctr, Moffett Field, CA 94035, USACALTECH, Jet Prop Lab, Div Earth & Space Sci, Pasadena, CA 91109, USAGarrett, TJ, Univ Utah, Dept Meteorol, 135 S 1460 E,Room 819, Salt Lake City, UT 84112 USA TI - Convective generation of cirrus near the tropopause AB - [1] During the July 2002 CRYSTAL-FACE field program based from Key West, Florida, aircraft measurements showed that long-lived thin tropopause cirrus (TTC) layers were often present above thunderstorm anvils. This paper describes these clouds and explores their possible origins. Measurements showed that the horizontal dimensions of TTC layers were nearly identical to convectively formed anvils beneath, but that TTC did not appear to have originated from convective detrainment. Rather, they appeared to have formed in stably stratified air derived from high altitudes near the tropopause. TTC were separated vertically from the top of the anvil by similar to1 km, they lacked precipitation particles, and they were strongly depleted in HDO, all of which indicate in situ formation. However, compared to surrounding clear air near the tropopause, TTC were enriched in moisture and trace gases. The degree of enrichment was consistent with mixing of air near the tropopause with the same convective air mass that produced the anvil. Unlike surrounding air, TTC had embedded a monochromatic gravity wave with a wavelength of 2 km and an amplitude of several hundred meters. This evidence, supported by a photograph from CRYSTAL-FACE, leads to the conjecture that TTC originate as stratiform pileus clouds that form near the tropopause ahead of vigorous convective uplift. We hypothesize that the pileus are penetrated by the convection, moistened through turbulent mixing, and once the convection subsides, they are sustained by radiative cooling due to the presence of the anvil layer beneath MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000225031400010 L2 - tropopause cirrus;anvil cirrus;convection;ENVIRONMENT INTERFACE INSTABILITY; TROPICAL TROPOPAUSE; THIN CIRRUS; SUBVISIBLE CIRRUS; SATELLITE-OBSERVATIONS; SPATIAL DIMENSIONS; OPTICAL-PROPERTIES; RADIATIVE IMPACTS; NASA ER-2; CLOUDS SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D21): 10891 UI - 3265 AU - Garrido L AU - Brena R AU - Sycara K AD - Tecnol Monterrey, Ctr Sist Inteligentes, Monterrey, Mexico. Carnegie Mellon Univ, Inst Robot, Pittsburgh, PA 15213, USA TI - Gaining competitive advantage through learning agent models AB - We present our bayesian-modeler agent which uses a probabilistic approach for agent modeling. It learns models about the others using a bayesian mechanism and then it plays in a rational way using a decision-theoretic approach. We also describe our empirical study on evaluating the competitive advantage of our modeler agent. We explore a range of strategies from the least- to most-informed one in order to evaluate the lower- and upper-limits of a modeler agent's performance. For comparison purposes, we also developed and experimented with other different modeler agents using reinforcement learning techniques. Our experimental results showed how an agent that learns models about the others, using our probabilistic approach, reach almost the optimal performance of the oracle agent. Our experiments have also shown that a modeler agent using a reinforcement learning technique have a performance not as good as the bayesian modeler' performance. However, it could be competitive under different assumptions and restrictions MH - Mexico|Nuevo Leon MH - USA T3 - ADVANCES IN ARTIFICIAL INTELLIGENCE - IBERAMIA 2004Lecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleleonardo.garrido@itesm.mx rbrena@itesm.mx katia@cs.cmu.edu0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBO40 AV - English IS - 0302-9743 UR - ISI:000226646200007 SO - 2004 ;():62-72 10892 UI - 3367 AU - Garza-Gonzalez E AU - Tijerina-Menchaca R AU - Perez-Perez GI AU - Bosques-Padilla FJ AD - NYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USABosques-Padilla, FJ, Av Madero & Gonzalitos S-N Colonia Mitras, Monterrey 64460, Nuevo Leon, Mexico TI - Bacteriostatic and bactericidal activity of rabeprazole against Helicobacter pylori MH - Mexico|Nuevo Leon MH - USA PB - FLORENCE: E I F T SRL RP - NOT IN FILE U3 - TC 1 U4 - Oncology;Pathology;Pharmacology & Pharmacy U5 - J;Letter AV - English IS - 1120-009X UR - ISI:000226497100017 L2 - PROTON PUMP INHIBITORS; IN-VITRO SO - Journal of Chemotherapy 2004 ;16(6):612-613 10893 UI - 3604 AU - Garza-Gonzalez E AU - Bosques-Padilla FJ AU - Perez-Perez GI AU - Flores-Gutierrez JP AU - Tijerina-Menchaca R AD - Univ Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Serv Gastroenterol, Monterrey 64460, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Nuevo Leon, MexicoNYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY, USAUniv Autonoma NuevoLeon, Hosp Univ Dr Jose Eleuterio Gonzalez, Lab Anat Patol, Monterrey 64460, Nuevo Leon, MexicoBosques-Padilla, FJ, Univ Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Serv Gastroenterol, Av Madero & Gonzalitos S-N Colonia Mitras Ctr, Monterrey 64460, Nuevo Leon, Mexico TI - Association of gastric cancer, HLA-DQA1, and infection with Helicobacter pylori CagA+ and VacA+ in a Mexican population AB - Background. The goal of this study was to determine the importance of Helicobacter pylori CagA+, VacA+, and HLA-DQA1 alleles in a Mexican population with gastric cancer (GC). Methods. We studied a group of Mexican patients (cases) with distal GC (n=22) or high-grade dysplasia (HGD; n=8) (mean age, 62.7 years, F:M=0.3; age range, 33-84 years) and 77 ethnically matched non-GC controls (mean age, 47.1 years; F:M=1.96; age range, 17-92 years). Both cases and controls were H. pylori-positive by at least two of the following diagnostic tests: rapid urease test, histology, culture, or serology. The presence of antibodies to CagA and VacA proteins was determined by Western blot, and the HLA-DQA1 typing was carried out by a polymerase chain reaction (PCR) sequence-specific primer method. Results. The carriage of H. pylori CagA+, VacA+ strains was associated with GC or HGD (odds ratio [OR], 6.07; 95% confidence interval [CI], 1.56-27.57; P=0.005). The allele frequency of DQA1*0503 was significantly lower in the GC-HGD group than in the non-GC group (OR, 0.13; 95% CI, 0.02-0.59). Logistic regression analysis identified the carriage of HLA- DQA1*0503 as an independent protective factor for GC (OR, 0.19; 95% CI, 0.04-0.94) and colonization with H. pylori CagA+, VacA+ strains as an independent risk factor for GC (OR, 6.15; 95% CI, 1.69-22.37). Conclusions. Infection with H. pylori CagA+, VacA+ strains represents a significant risk for the development of GC. The absence of HLA-DQA1*0503 could be a host risk factor for the development of GC in Mexican patients MH - Mexico|Nuevo Leon MH - USA PB - TOKYO: SPRINGER TOKYO RP - NOT IN FILE U3 - TC 5 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0944-1174 UR - ISI:000225961900002 L2 - HLA;Helicobacter;DQA1;CagA;VacA;ATROPHIC GASTRITIS; ULCER PATIENTS; INCREASED RISK; ADENOCARCINOMA; GENE; ANTIBODIES; STRAINS SO - Journal of Gastroenterology 2004 ;39(12):1138-1142 10894 UI - 6581 AU - Garza-Gonzalez E AU - Bosques-Padilla FJ AU - Tijerina-Menchaca R AU - Perez-Perez GI AD - Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Mexico City, DF, MexicoUniv Autonoma Nuevo Leon, Hosp Univ Dr Jose Eleuterio Gonzalez, Serv Gastroenterol, Mexico City, DF, MexicoNYU, Sch Med, Dept Med, New York, NY, USANYU, Sch Med, Dept Microbiol, New York, NY 10016, USAGarza-Gonzalez, E, Colonia Mitras Ctr, Av Madero & Dr Eduardo Aguirre Pequeno S-N, Mexico City 64460, DF, Mexico TI - Characterisation of Helicobacter pylori isolates from the north-eastern region of Mexico AB - The vacA and cagA genotypes of 50 Helicobacter pylori isolates from patients in the north-eastern region of Mexico were characterised by PCR, and the correlation between genotypes and different clinical outcomes was investigated. Strains of H. pylori that are vacA s1/m1 and cagA positive have previously been associated with more severe clinical outcomes, and some studies have shown differences in the vacA and cagA genotypes in different geographical regions. The six possible combinations of the vacA signal (s) and middle (m) regions were identified in this population, and the most frequent genotype was s2/m2. Thirty-two (64%) isolates were identified as cagA-positive. The s region was not amplified from seven of the cagA-positive isolates, and the m region was not amplified from one cagA-negative isolate, indicating that additional subfamilies of s and m genotypes may exist. The s1/m1 genotype was associated with cagA-positive strains (p < 0.05). No association was found between the vacA and cagA genotypes and clinical outcomes MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1198-743X UR - ISI:000187850200006 L2 - cagA;genotype;Helicobacter pylori;vacA;ALLELIC DIVERSITY; VACA GENOTYPES; CAGA STATUS; STRAINS; COLONIZATION SO - Clinical Microbiology and Infection 2004 ;10(1):41-45 10895 UI - 5621 AU - Garza-Perez JR AU - Lehmann A AU - rias-Gonzalez JE AD - Inst Politecn Nacl, Unidad Merida, Ctr Invest & Estudios Avanzados, Coral Reef Ecosyst Ecol Lab, Merida 97210, Yucatan, MexicoSwiss Ctr Carto Fauna, CH-2000 Neuchatel, SwitzerlandArias-Gonzalez, JE, Inst Politecn Nacl, Unidad Merida, Ctr Invest & Estudios Avanzados, Coral Reef Ecosyst Ecol Lab, Carr Ant Progreso Km 6 Cordemex, Merida 97210, Yucatan, Mexico TI - Spatial prediction of coral reef habitats: integrating ecology with spatial modeling and remote sensing AB - Spatial prediction of coral reef habitats and coral reef community components was approached on the basis of the 'predict first, classify later' paradigm. Individual community components (biotic and geomorphologic bottom features) were first predicted and then classified into composite habitats. This approach differs from widely applied methods of direct classification based on remote sensing only. In situ coral reef community- condition assessment was first used to measure a response variable (percentage cover of habitat). Reef bottom features (topographic complexity, sand-sediment, rock-calcareous pavement and rubble) were then predicted using generalized additive models (GAMs) applied to continuous environmental maps, high-resolution Ikonos satellite images and a reef digital topographic model (DTM). Next, using GAMs on newly created bottom maps, models were fitted to predict coral community components (hard coral, sea-grass, algae, octocorals). At this stage, high-resolution maps of the geomorphologic and biotic components of the coral reef community at an experimental site (Akumal Reef in the Mexican Caribbean) were produced. Coral reef habitat maps were derived using GIS following a hierarchical classification procedure, and the resulting merged map depicting 8 habitats was compared against thematic maps created by traditional supervised classification. This general approach sets a baseline for future studies involving more complex spatial and ecological predictions on coral reefs MH - Mexico|Yucatan MH - Switzerland PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000221060100013 L2 - GAM;GRASP;GIS;Ikonos;DTM;Mexican Caribbean;GENERALIZED ADDITIVE-MODELS; GEOGRAPHIC INFORMATION-SYSTEMS; GIS-BASED MODEL; ALPINE AREA; VEGETATION; MACROPHYTES; RESOLUTION; IMAGERY; CLASSIFICATION; DISTRIBUTIONS SO - Marine Ecology-Progress Series 2004 ;269():141-152 10896 UI - 3378 AU - Gasca R AU - Haddock SHD AD - Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039, USAColegio Frontera Sur, ECOSUR, Roo 77000, MexicoHaddock, SHD, Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA TI - Associations between gelatinous zooplankton and hyperiid amphipods (Crustacea : Peracarida) in the Gulf of California AB - Hyperiid amphipods are pelagic crustaceans that live associated with gelatinous zooplankton including medusae, ctenophores, siphonophores, and salps. Standard plankton sampling disrupts natural associations, so the most reliable way to determine an association is through direct observation of the organisms in their environment. The planktonic fauna of the Gulf of California dwelling between 10 and 3000 in was surveyed using SCUBA diving and a remotely operated submersible (ROV) during March 2003. Here we report our observations on a total of 14 symbiotic associations found between the hyperiid amphipods and various taxa of gelatinous zooplankton. We found parental care behavior in a group of amphipods (Oxycephalidae) in which this phenomenon has not been previously reported. For two hyperiid species. Euthamneus rostratus and Vibilia australis, we present the first information on their symbiotic relations. Additional hosts were discovered for other well-known and widely distributed hyperiid species (i.e. Brachyscelus crusculum, Hyperoche medusarum). Photographic evidence of some of these interactions is included in this contribution. This is the first survey of these relationships in the Gulf of California, and many aspects of the ecology and biology of these symbioses remain to he studied MH - USA MH - Mexico|Quintana Roo PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 9 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000226416700061 L2 - symbiosis;plankton;siphonophores;medusae;ctenophores;EXTENDED PARENTAL CARE; GALBA SO - Hydrobiologia 2004 ;530-31():529-535 10897 UI - 4443 AU - Gasca R AD - El Colegio Frontera Sur ECOSUR, Unidad Chetumal, Chetumal 77000, Q Roo, MexicoSmithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560, USAGasca, R, El Colegio Frontera Sur ECOSUR, Unidad Chetumal, Carr Chetumal Calderitas Km 5-5,Apdo Postal 424, Chetumal 77000, Q Roo, Mexico TI - Distribution and abundance of hyperiid amphipods in relation to summer mesoscale features in the southern Gulf of Mexico AB - Seventy-one hyperiid species were identified from 97 zooplankton samples collected in the southern Gulf of Mexico during July 1988. About 91% of the adult individuals belonged to five species: Lestrigonus bengalensis (86.56% of total hyperiid numbers), Anchylomera blossevillei (1.20%), Phronimopsis spinifera (1.05%), Hyperioides longipes (1.00%) and Hyperietta vosseleri (0.99%). Overall, up to 74% of the hyperiids were collected at night, although a reverse migration was observed in the anticyclones. The mean abundance was 5-fold higher at the neritic stations than in the oceanic areas. This tendency was even more marked at night. Night samples yielded about the same number of species as during the daytime (56 taxa versus 61). Four mesoscale features (two anticyclones, one cyclone and one upwelling) characterized the oceanic mesoscale circulation in the surveyed area. The abundance of the oceanic hyperiid community showed significant differences related to some of the mesoscale features active in the area, i.e. the abundance in the Lazy Eddy anticyclone was lower than that in the cyclone (day and night). Overall, the upwelling areas showed a tendency to have higher abundances than the downwelling features (anticyclones). Cluster analysis indicated neritic-oceanic differences rather than mesoscale feature-related differences in the local hyperiid community. The neritic community showed differences that were attributed to the effect of upwelling. The summer and spring hyperiid communities had important differences in the same area, thus suggesting a seasonal succession of the gulf hyperiid community MH - Mexico|Quintana Roo MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0142-7873 UR - ISI:000223948300002 L2 - CARIBBEAN SEA; WESTERN GULF; CORE RING; CRUSTACEA; WARM; SIPHONOPHORES; EUPHAUSIACEA; ZOOPLANKTON; PERACARIDA; PLANKTON SO - Journal of Plankton Research 2004 ;26(9):993-1003 10898 UI - 5642 AU - Gasca R AU - Suarez-Morales E AD - ECOSUR, Unidad Chetumal, Chetumal 77000, MexicoSmithsonian Inst, Natl Museum Nat Hist, Washington, DC, USAGasca, R, ECOSUR, Unidad Chetumal, Apdo Postal 424, Chetumal 77000, Mexico TI - Distribution and abundance of hyperiid amphipods (Crustacea : Peracarida) of the Mexican Caribbean sea, (August 1986) AB - Thirty four hyperiid amphipods were recorded from the analysis of epipelagic zooplankton samples (0-220 m) collected during an oceanographic cruise carried out in August, 1986 in the Mexican Caribbean Sea. Eight of these species (Scina stenopus, S. tullbergi, S. nana, S. wagleri atlantis, Phronimopsis spinifera, Phrosina semilunata, Primno brevidens, and P. latreillei), are new records in the Caribbean Sea. The most abundant species in the area were: Lestrigonus bengalensis (39.68% of total hyperiid numbers), Tetrathyrus forcipatus (14%), Eupronoe intermedia (7.14%), and Brachyscelus crusculum (3.56%). These are among the most common forms in the western Caribbean. The overall mean abundance of hyperiids (240 org./1000 m(3)) is low when compared with other western Atlantic areas like the Gulf of Mexico, but it is similar to values obtained in the oligotrophic waters of the western Caribbean. A Bray-Curtis similarity index analysis revealed three groups of stations that suggest a strong influence of the fully oceanic hyperiids even in areas relatively close to the coastline. This is attributed to the local current pattern and to the narrowness of the continental shelf along the Mexican Caribbean coast MH - Mexico|Quintana Roo MH - USA PB - MAYAGUEZ: UNIV PUERTO RICO, RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation U5 - J;Article AV - English IS - 0008-6452 UR - ISI:000221033500004 L2 - zooplankton;crustaceans;marine ecology;epipelagic;tropical;GULF-OF-MEXICO; ZOOPLANKTON; WATERS SO - Caribbean Journal of Science 2004 ;40(1):23-30 10899 UI - 5637 AU - Gathof BS AU - Picker SM AU - Rojo J AD - Univ Cologne, D-50924 Cologne, GermanyNatl Autonomous Univ Mexico, Mexico Gen Hosp, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Sch Med, Dept Publ Hlth, Mexico City 04510, DF, MexicoPicker, SM, Univ Cologne, Joseph Stelzmann Str 9, D-50924 Cologne, Germany TI - Epidemiology, etiology and diagnosis of venous thrombosis MH - Germany MH - Mexico|Distrito Federal PB - MUNICH: I HOLZAPFEL VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0949-2321 UR - ISI:000221056700001 L2 - venous thromboembolism;deep vein thrombosis;diagnostic score strategy;DEEP-VEIN THROMBOSIS; PULMONARY-EMBOLISM; RISK-FACTORS; NONINVASIVE DIAGNOSIS; ORAL-CONTRACEPTIVES; GENERAL-POPULATION; THROMBOEMBOLISM; MANAGEMENT; PROBABILITY; PREVENTION SO - European Journal of Medical Research 2004 ;9(3):95-103 10900 UI - 2950 AU - Gaxiola E AU - Hewkin A AU - Kupfer S AU - Champion A AU - Pepine CJ AD - Inst Cardiovasc, Guadalajara, Jalisco, MexicoAbbott Labs, Chicago, IL, USAUniv Florida, Gainesville, FL, USA TI - Verapamil-based and atenolol-based strategies result in similar CV outcomes and incidence of revascularization in hypertensive coronary artery disease patients: the INternational VErapamil SR-Trandolapril (INVEST) study MH - Mexico|Jalisco MH - USA PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000224056502644 SO - European Heart Journal 2004 ;25():661-662 10901 UI - 4706 AU - Gazeau F AU - Smith SV AU - Gentili B AU - Frankignoulle M AU - Gattuso JP AD - Univ Paris 06, CNRS, Lab Oceanog Villefranche, F-06234 Villefranche Sur Mer, FranceUniv Liege, MARE, Unite Oceanog Chim, B-4000 Sart Tilman Par Liege, BelgiumCtr Invest Cientifica & Educ Super Ensenada, Dept Ecol, Ensenada, Baja California, MexicoGazeau, F, Univ Paris 06, CNRS, Lab Oceanog Villefranche, BP 28, F-06234 Villefranche Sur Mer, France TI - The European coastal zone: characterization and first assessment of ecosystem metabolism AB - The geomorphic, oceanographic, terrestrial and anthropogenic attributes of the European coastal zone are described and published data on ecosystem function (primary production and respiration) are reviewed. Four regions are considered: the Baltic Sea, Mediterranean Sea, Black Sea and the European Atlantic coast including the North Sea. The metabolic database (194 papers) suffers from a non-homogeneous geographical coverage with no usable data for the Black Sea which was therefore excluded from this part of our study. Pelagic gross primary production in European open shelves is, by far, the most documented parameter with an estimated mean of 41 mmol C m(-2) d(-1), the lowest value is reported in the Mediterranean Sea (21 mmol C m(-2) d(-1)) and the highest one in the Atlantic/North Sea area (51 mmol C m(-2) d(-1)). Microphytobenthic primary production, mostly measured in shallow areas, is extrapolated to the entire 0-200 m depth range. Its contribution to total primary production is low in all regions (mean: 1.5 mmol C m(-2) d(-1)). Although macrophyte beds are very productive, a regional production estimate is not provided in this study because their geographical distribution along the European coastline remains unknown. Measurements of pelagic community respiration are clearly too sparse, especially below the euphotic zone, to yield an accurate picture of the fate of organic matter produced in the water column. With a mean value of 17 mmol C m(-2) d(-1), benthic community respiration consumes approximately 40% of the pelagic organic matter production. Estuaries generally exhibit high metabolic rates and a large range of variation in all parameters, except microphytobenthic primary production. Finally, the problem of entrophication in Europe is discussed and the metabolic data obtained in the framework of the Land-Ocean Interactions in the Coastal Zone (LOICZ) project are compared with available direct measurements of net ecosystem production. (C) 2004 Elsevier Ltd. All rights reserved MH - Belgium MH - France MH - Mexico|Baja California PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 26 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Review AV - English IS - 0272-7714 UR - ISI:000223239400013 L2 - ecosystems;global;metabolism;shelf;estuaries;primary production;respiration;Europe;NORTHERN ADRIATIC SEA; SOUTHERN BALTIC SEA; PHYTOPLANKTON PRIMARY PRODUCTION; BENTHIC COMMUNITY METABOLISM; PRIMARY PRODUCTIVITY; POSIDONIA-OCEANICA; ORGANIC-MATTER; INTERTIDAL SEDIMENTS; BACTERIAL PRODUCTION; SEASONAL-VARIATIONS SO - Estuarine Coastal and Shelf Science 2004 ;60(4):673-694 10902 UI - 4605 AU - Geelen JF AU - Richter RB AU - Salazar G AD - Univ Waterloo, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, CanadaUniv Autonoma San Luis Potosi, Inst Invest Comun Opt, San Luis Potosi 78210, MexicoGeelen, JF, Univ Waterloo, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, Canada TI - Embedding grids in surfaces AB - We show that if a very large grid is embedded in a surface, then a large subgrid is embedded in a disc in the surface. This readily implies that: (a) a minor-minimal graph that does not embed OF in a given surface has no very large grid; and (b) a minor-minimal k-representative embedding in the surface has no very large grid. Similar arguments show (c) that if G is minimal with respect to crossing number, then G has no very large grid. This work is a refinement of Thomassen (J. Combin. Theory Ser. B 70 (1997) 306). (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|San Luis Potosi PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0195-6698 UR - ISI:000223480400004 L2 - GRAPH MINORS; TREE-WIDTH; THEOREM; TRIANGULATIONS SO - European Journal of Combinatorics 2004 ;25(6):785-792 10903 UI - 1199 AU - Geiss AA AU - Wibbels T AU - Vega L AU - Lira D AU - Acosta R AU - Pena J AU - Burchfield P AU - Schroeder B AD - Univ Alabama, Birmingham, AL, USAInst Nacl Pesca, Mexico City, DF, MexicoNatl Marine Fisheries Serv, Silver Spring, MD, USA TI - Six-year evaluation of hatchling Kemp's ridle sex ratios produced in the conservation program at Rancho Nuevo, Mexico MH - Mexico|Distrito Federal MH - USA PB - MCLEAN: SOC INTEGRATIVE COMPARATIVE BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Meeting Abstract AV - English IS - 1540-7063 UR - ISI:000226721401295 SO - Integrative and Comparative Biology 2004 ;44(6):699-699 10904 UI - 4760 AU - Geiss C AU - Voigt D AD - UNAM, Inst Matemat, Mexico City 04510, DF, MexicoUniv Bielefeld, Fak Math, D-33501 Bielefeld, GermanyGeiss, C, UNAM, Inst Matemat, Mexico City 04510, DF, Mexico TI - Non-reduced automorphism schemes AB - We give a criterion for a group scheme to be not reduced involving infinitesimal multiplicative subgroups. As a consequence the scheme of outer automorphisms of a finite-dimensional algebra A over an algebraically closed field of characteristic p is not reduced if A admits a Z(p)-grading which cannot be lifted to a Z-grading. This applies in particular when A is the group-algebra of a p-group. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000223119400007 SO - Journal of Pure and Applied Algebra 2004 ;193(1-3):123-127 10905 UI - 5530 AU - Geissen V AU - Kampichler C AD - El Colegio Frontera Sur, Villahermosa 86100, Tabasco, MexicoFree Univ Berlin, Soil Zool & Ecol Lab, D-12165 Berlin, GermanyGeissen, V, El Colegio Frontera Sur, Adm Correos 2,Apartado Postal 1042, Villahermosa 86100, Tabasco, Mexico TI - Limits to the bioindication potential of Collembola in environmental impact analysis: a case study of forest soil-liming and fertilization AB - We tested the suitability of the collembolan community as a bioindicator for assessing the effects of forest soil-liming and fertilization on the belowground decomposer community. Our investigation was based on a 5-year survey that took place in a German oak-hornbeam and spruce forest in which amelioration measures took place in 1988, 1994 and 1995, with chemical parameters and Collembola being sampled between 1993 and 1997. To address these questions, we applied new methods which have not yet, to our knowledge, been used in biomonitoring studies on forest soils. We used a time-lag analysis for the detection of directional change and a regression-tree induction to show the relationship between Collembola and soil factors. Soil parameters changed considerably after the onset of liming and fertilization. However, no change was detected in community composition over time, nor was there a relationship between Collembola and soil parameters that would make possible the development of a model with at least a moderate predictive success. Taking into account the effort invested in this study (5-year sampling period, identification of 35,000 Collembola, 99 species, 1,170 chemical analyses), we question the suitability of collembolan communities as a bioindicator for forest disturbance MH - Germany MH - Mexico|Tabasco PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Soil Science U5 - J;Article AV - English IS - 0178-2762 UR - ISI:000221469600001 L2 - ecological monitoring;indicator species;community composition change;regression-tree induction;CONIFEROUS FOREST; MICROBIAL BIOMASS; REGRESSION TREES; COMMUNITIES; CHEMISTRY; ACIDIFICATION; NETHERLANDS; DECLINE; HABITAT; STANDS SO - Biology and Fertility of Soils 2004 ;39(6):383-390 10906 UI - 5355 AU - Gelbukh A AU - Bolshakov IA AD - Natl Polytech Inst, Ctr Res Comp, Mexico City, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - On correction of semantic errors in natural language texts with a dictionary of literal paronyms AB - Due to the open nature of the Web, search engines must include means of meaningful processing of incorrect texts, including automatic error detection and correction. One of wide-spread types of errors in Internet texts are malapropisms, i.e., semantic errors replacing a word by another existing word similar in letter composition and/or sound but semantically incompatible with the context. Methods for detection and correction of malapropisms have been proposed recently. Any such method relies on a generator of correction candidates-paronyms, i.e., real words similar to the suspicious one encountered in the text and having the same grammatical properties. Literal paronyms are words at the distant of few editing operations from a given word. We argue that a dictionary of literal paronyms should be compiled beforehand and that its units should be grammeme names. For Spanish, such grammemes are (1) singulars and plurals of nouns; (2) adjectives plus participles; (3) verbs in infinitive; (4) gerunds plus adverbs; (5) personal verb forms. Basing on existing Spanish electronic dictionaries, we have compiled a dictionary of one-letter-distant literal paronyms. The size of the dictionary is few tens thousand entries, an entry averaging approximately three paronyms. We calculate the gain in number of candidate search operations achievable through the proposed dictionary and give illustrative examples of correcting one-letter malapropisms using our dictionary MH - Mexico|Distrito Federal MH - South Korea T3 - ADVANCES IN WEB INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlegelbukh@cic.ipn.mx igor@cic.ipn.mx2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBAE37 AV - English IS - 0302-9743 UR - ISI:000221807000011 SO - 2004 ;():105-114 10907 UI - 5417 AU - Gelbukh A AU - Sidorov G AU - Han SY AU - Hernandez-Rubio E AD - Inst Politecn Nacl, Ctr Res Comp, Nat Language & Text Proc Lab, Mexico City 07738, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Automatic enrichment of a very large dictionary of word combinations on the basis of dependency formalism AB - The paper presents a method of automatic enrichment of a very large dictionary of word combinations. The method is based on results of automatic syntactic analysis (parsing) of sentences. The dependency formalism is used for representation of syntactic trees that allows for easier treatment of information about syntactic compatibility. Evaluation of the method is presented for the Spanish language based on comparison of the automatically generated results with manually marked word combinations MH - Mexico|Distrito Federal MH - South Korea T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlegelbukh@cic.ipn.mx sidorov@cic.ipn.mx hansy@cau.ac.kr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600044 L2 - collocations;parsing;dependency grammar;Spanish SO - 2004 ;():430-437 10908 UI - 5942 AU - Gelbukh A AU - Sidorov G AU - Han SY AU - Hernandez-Rubio E AD - Natl Polytech Inst, Ctr Res Comp, Mexico City 07738, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Automatic syntactic analysis for detection of word combinations AB - The paper presents a method for automatic detection of "non-trivial" word combinations in the text. It is based on automatic syntactic analysis. The method shows better precision and recall than the baseline method (bigrams). It was tested on a text in Spanish. The method can be used for enrichment of very large dictionaries of word combinations MH - Mexico|Distrito Federal MH - South Korea T3 - COMPUTATIONAL LINGUISTICS AND INTELLIGENT TEXT PROCESSINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlegelbukh@cic.ipn.mx sidorov@cic.ipn.mx hansy@cau.ac.kr3HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY59Y AV - English IS - 0302-9743 UR - ISI:000189417900029 SO - 2004 ;():243-247 10909 UI - 4809 AU - Gelinas A AU - Kring DA AU - Zurcher L AU - Urrutia-Fucugauchi J AU - Morton O AU - Walker RJ AD - Univ Maryland, Dept Geol, Isotope Geochem Lab, College Pk, MD 20742, USAUniv Arizona, Lunar & Planetary Lab, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoWalker, RJ, Univ Maryland, Dept Geol, Isotope Geochem Lab, College Pk, MD 20742 USA TI - Osmium isotope constraints on the proportion of bolide component in Chicxulub impact melt rocks AB - The spatial distribution and amount of material transferred from the bolide involved in the Cretaceous/Tertiary (K/T) event to the target rocks at Chicxulub is still poorly constrained. In this study, Re-Os isotopic analyses of impact melt breccias and lithic clasts from the Yaxcopoil-1 (Yax-1) borehole were used to determine the distribution and proportion of the bolide component in the target rocks. Because of the much greater concentration of Os in chondritic meteorites compared to the target rocks, little addition of the bolide component would be necessary to greatly perturb the Os concentration and isotopic composition of target rocks. Hence, this is a very sensitive means of examining bolide contributions to the target rocks. For the examined suite of samples, the initial Os-187/Os-188 ratios vary from 0.19 to 2.3. Conservative mixing calculations suggest that the bolide component comprised as much as approximately 0.1%, by mass, of some samples. Most samples, however, have negligible contributions from the bolide. No samples have Os that is dominated by the bolide component, so for this suite of samples, it is impossible to fingerprint the chemical nature of the bolide using relative abundances of siderophile elements. These results suggest that the bolide did not contribute a significant amount of material to the target rocks. This may, in turn, indicate that most of the bolide was vaporized upon impact or otherwise ejected without mixing with the melt from the target MH - USA MH - Mexico|Distrito Federal PB - FAYETTEVILLE: METEORITICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1086-9379 UR - ISI:000222939300014 L2 - RE-187-OS-187 SYSTEMATICS; METEORITIC MATERIAL; CHONDRITES; CRATERS SO - Meteoritics & Planetary Science 2004 ;39(6):1003-1008 10910 UI - 5980 AU - Georgakakis A AU - Georgantopoulos I AU - Vallbe M AU - Kolokotronis V AU - Basilakos S AU - Plionis M AU - Stewart GC AU - Shanks T AU - Boyle BJ AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceUniv Durham, Sci Labs, Dept Phys, Durham DH1 3LE, EnglandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandAnglo Australian Observ, Epping, NSW 2121, AustraliaGeorgakakis, A, Natl Observ Athens, Inst Astron & Astrophys, 1 Metaxa & V Pavlou, Athens 15236, Greece TI - The XMM-Newton/2dF survey - II. The nature of X-ray-faint optically bright X-ray sources AB - In this paper we investigate the properties of low X-ray-to-optical flux ratio sources detected in a wide-area (2.5 deg(2)) shallow [f(X)(0.5-8 keV) approximate to 10(-14) erg s(-1) cm(-2)] XMM-Newton survey. We find a total of 26 sources (5 per cent of the total X-ray-selected population) with log f(X)/f(opt) < 0.9 to the above flux limit. Optical spectroscopy is available for 20 of these low X-ray-to-optical flux ratio objects. Most of them are found to be associated with Galactic stars (a total of eight) and broad-line active galactic nuclei (AGNs; a total of eight). We also find two sources with optical spectra showing absorption and/or narrow emission lines and X-ray/optical properties suggesting AGN activity. Another two sources are found to be associated with low-redshift galaxies with narrow emission-line optical spectra, X-ray luminosities L-X(0.5-8 keV) &AP; 10(41) erg s(-1) and logf(X)/f(opt) &AP; 2 suggesting 'normal' star-forming galaxies. Despite the small-number statistics the sky density of 'normal' X-ray-selected star-forming galaxies at the flux limit of the present sample is low, consistent with previous ROSAT High-Resolution Imager (HRI) deep surveys. Also, the number density estimated here is in good agreement with both the log N-log S of 'normal' galaxies in the Chandra Deep Field North (extrapolated to bright fluxes) and model predictions based on the X-ray luminosity function of local star-forming galaxies MH - Australia MH - United Kingdom MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000220152700017 L2 - surveys;X-rays : galaxies;X-rays : general;DEEP FIELD-NORTH; DIGITAL SKY SURVEY; DWARF SEYFERT NUCLEI; ROSAT SURVEY; STARBURST GALAXIES; XMM-NEWTON; CHANDRA; EMISSION; IDENTIFICATIONS; POPULATIONS SO - Monthly Notices of the Royal Astronomical Society 2004 ;349(1):135-145 10911 UI - 4309 AU - Georgakakis AE AU - Georgantopoulos I AU - Basilakos S AU - Plionis M AU - Kolokotronis V AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoGeorgakakis, AE, Natl Observ Athens, Inst Astron & Astrophys, I Metaxa & V Pavlou, Athens 15236, Greece TI - The Needles in the Haystack Survey: Searching for X-ray-selected normal galaxies AB - In this paper we present the first results from an ongoing serendipitous survey aiming to identify X-ray-selected 'normal' galaxies [i.e. not dominated by active galactic nuclei (AGNs)] by combining archival XMM-Newton data with the Sloan Digital Sky Survey. In the first 4.5 deg(2) of this program, we have identified a total of 11 'normal' galaxy candidates (eight of them with optical spectroscopy) with fluxes f(X)(0.5-8 keV) approximate to 10(-15)-10(-13) erg s(-1) cm(-2). These sources are selected to have low X-ray-to-optical flux ratio(log f(X)/f(opt)less than or similar to-2), soft X-ray spectral properties and optical spectra, when available, consistent with the presence of a stellar ionizing continuum. These sources comprise both early- and late-type systems at redshifts zless than or similar to 0.2 with luminosities L-X(0.5-8 keV) approximate to 10(39)-10(42) erg s(-1). This data set provides the first tight constraint on the surface density of X-ray-selected 'normal' galaxies at relatively bright fluxes spanning 2 orders of magnitude (10(-15)-10(-13) erg s(-1) cm(-2)). The slope of the 'normal' galaxy log N-log S relation in the above flux range is estimated to be -1.4 +/- 0.3, consistent with the Euclidean prediction. We also discuss the prospects of 'normal' galaxy studies at X-ray wavelengths using both our continuously expanding survey and future X-ray missions MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000224242100014 L2 - surveys;X-rays : galaxies;X-rays : general;FIELD NORTH SURVEY; DIGITAL SKY SURVEY; DEEP SURVEY; OPTICALLY BRIGHT; SPIRAL GALAXIES; XMM-NEWTON; CHANDRA; CLUSTERS; CATALOG; SOUTH SO - Monthly Notices of the Royal Astronomical Society 2004 ;354(1):123-126 10912 UI - 6293 AU - George ML AU - Regalado E AU - Warburton M AU - Vasal S AU - Hoisington D AD - IRRI, DAPO 7777, CIMMYT, Asian Maize Biotechnol Network, Manila, PhilippinesCIMMYT, Mexico City 06600, DF, MexicoCIMMYT, Asian Reg Maize Program, Bangkok, ThailandGeorge, ML, IRRI, DAPO 7777, CIMMYT, Asian Maize Biotechnol Network, Manila, Philippines TI - Genetic diversity of maize inbred lines in relation to downy mildew AB - A major emphasis in maize breeding in Asian countries has been the improvement for resistance to downy mildew, a serious disease that causes significant yield losses. A total of 102 inbred lines, including lines from Asian breeding programs, Mexico, USA and Germany, were analyzed with 76 SSR markers to measure diversity and investigate the effect of selection for downy mildew resistance. A mean polymorphism information content of 0.59, with a range of 0.14 to 0.83, was observed. Diversity at the gene level showed an average of 5.4 alleles per locus and a range of two to 16 alleles per locus, with a total of 409 alleles. About half of the alleles in the Asian lines had frequencies of 0.10 or less, and only 2% had frequencies > 0.80, indicating the presence of many alleles, and thus a high level of diversity. Some of the high-frequency alleles were in chromosomal regions associated with disease resistance. However, the frequencies of alleles in three SSR loci that are linked to a QTL for resistance to downy mildews in Asia were not significantly different in the subtropical/ tropical Asian lines as compared to all the lines in the study. Lines from the US, Germany, and China, comprised three clusters of temperate maize (GS = 0.31), while those from India, Indonesia, Philippines, Thailand, Vietnam and CIMMYT comprised seven indistinct clusters of subtropical and subtropical maize (GS = 0.29). We conclude that maize breeding activity in Asia has not caused a decline in the overall amount of diversity in the region MH - Mexico|Distrito Federal MH - Philippines MH - Thailand PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000188761700002 L2 - Asia;downy mildew;genetic diversity;maize;simple sequence repeats (SSR);RESISTANCE; MARKERS; IDENTIFICATION; ORGANIZATION; UTILITY; RFLPS SO - Euphytica 2004 ;135(2):145-155 10913 UI - 5214 AU - George MLC AU - Regalado E AU - Li W AU - Cao M AU - Dahlan M AU - Pabendon M AU - Warburton ML AU - Xianchun X AU - Hoisington D AD - IRRI, CIMMYT, Asian Maize Biotechnol Network, MetroManila, PhilippinesSichuan Agr Univ, Maize Res Inst, Yaan 625014, Sichuan, Peoples R ChinaAgcy Agr Res & Dev, Indonesia Cereal Res Inst, Maros, S Sulawesi, IndonesiaChinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Beijing 100081, Peoples R ChinaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoGeorge, MLC, IRRI, CIMMYT, Asian Maize Biotechnol Network, DAPO 7777, MetroManila, Philippines TI - Molecular characterization of Asian maize inbred lines by multiple laboratories AB - This study focuses on the standardization of techniques across laboratories to enable multiple datasets to be compared and combined in order to obtain reliable and robust wide-scale patterns of diversity. A set of protocols using a core collection of simple sequence repeat (SSR) markers, reference lines and standard alleles, plus a common system of allele nomenclature, was adopted in the study of maize genetic diversity in a network of laboratories in Asia. Pair-wise allele comparisons of the reference lines, done to assess the general agreement between datasets from four laboratories, showed error rates (raw) ranging from 5.8% to 9.7%, which were reduced to less than 8% after adjustments of correctable errors, and further reduced to less than 6% after the exclusion of all markers with greater than 10% individual error rates. Overall, 45% of the total mismatches were due to frameshift errors, 39% to wrong allele size, 15% to failed amplification and 1% to "extra" alleles. Higher genetic similarity values of the reference lines were achieved using fewer markers with data of higher quality rather than with more markers of questionable quality. Cluster analysis of the merged datasets showed the lines from southern China to be highly diverse, falling into six of the seven clusters observed and all well represented by tester lines. The lines from Indonesia fell into five of six groups, with two main groups represented by tester lines. The CIMMYT lines developed for the Asian region showed a relatively narrow genetic base, falling in two out of seven and in three out of six clusters in China and Indonesia, respectively. In contrast to the case in southern China where 95% of the lines clustered separately from the CIMMYT lines, lines in the Indonesian breeding program show a closer relationship with the CIMMYT lines, reflecting a long history of germplasm exchange MH - Indonesia MH - Mexico|Distrito Federal MH - Peoples R China MH - Philippines PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000221936300010 L2 - GENETIC DIVERSITY; RFLP; CONSTRUCTION; POPULATIONS; VARIETIES; DATABASE; MARKERS; AFLP; RAPD SO - Theoretical and Applied Genetics 2004 ;109(1):80-91 10914 UI - 3973 AU - Geppert U AU - Kuker M AU - Page D AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoGeppert, U, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - Temperature distribution in magnetized neutron star crusts AB - We investigate the influence of different magnetic field configurations on the temperature distribution in neutron star crusts. We consider axisymmetric dipolar fields which are either restricted to the stellar crust, "crustal fields", or allowed to penetrate the core, "core fields". By integrating the two-dimensional heat transport equation in the crust, taking into account the classical (Larmor) anisotropy of the heat conductivity, we obtain the crustal temperature distribution, assuming an isothermal core. Including classical and quantum magnetic field effects in the envelope as a boundary condition, we deduce the corresponding surface temperature distributions. We find that core fields result in practically isothermal crusts unless the surface field strength is well above 10(15) G while for crustal fields with surface strength above a few times 10(12) G significant deviations from crustal isothermality occur at core temperatures inferior or equal to 10(8) K. At the stellar surface, the cold equatorial region produced by the suppression of heat transport perpendicular to the field by the Larmor rotation of the electrons in the envelope, present for both core and crustal fields, is significantly extended by that classical suppression at higher densities in the case of crustal fields. This can result, for crustal fields, in two small warm polar regions which will have observational consequences: the neutron star has a small effective thermally emitting area and the X-ray pulse profiles are expected to have a distinctively different shape compared to the case of a neutron star with a core field. These features, when compared with X-ray data on thermal emission of young cooling neutron stars, would provide a first step toward a new way of studying the magnetic flux distribution within a neutron star MH - Germany MH - Mexico|Distrito Federal PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000224965300031 L2 - stars : neutron;stars : magnetic fields;conduction;dense matter;X-rays : stars;X-RAY PULSAR; THERMAL STRUCTURE; SURFACE-TEMPERATURE; ROSAT DATA; MATTER; RADIATION; ENVELOPES; FIELDS; EQUATION; CORE SO - Astronomy & Astrophysics 2004 ;426(1):267-277 10915 UI - 5322 AU - Gernets AA AU - Makarets MV AU - Koshevaya SV AU - Grimalsky VV AU - Romero DJ AU - Kotsarenko AN AD - Autonomous Univ State Morelos, Res Ctr Appl Sci & Engn, CIICAp, FCQel, Cuernavaca 62210, Morelos, MexicoKyiv Natl Shevchenko Univ, Dept Phys, UA-01033 Kiev, UkraineINAOE, Puebla 72000, MexicoUNAM, Ctr Geosci, Queretaro 76001, MexicoKoshevaya, SV, Autonomous Univ State Morelos, Res Ctr Appl Sci & Engn, CIICAp, FCQel, Av Univ,Col Chamilpa,1001, Cuernavaca 62210, Morelos, Mexico TI - Electromagnetic emission caused by the fracturing of piezoelectric crystals with an arbitrarily oriented moving crack AB - Electromagnetic emission (EME) caused by fracturing of piezoelectric effects in rocks has been studied. We have analyzed a finite size piezocrystal undergoing such mechanical stresses which cause an uniform movement of a crack. Direction of the crack movement and its front orientation have been assumed arbitrary with respect to the crystal axes. In such a case polarization currents appear with potential and vortical components, corresponding to the electric polarization currents and magnetization currents. Amplitude-frequency characteristics of the EME in long-wavelength region have been analyzed too. This effect of EME is of great importance for natural hazards including volcano eruptions and earthquakes. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - Mexico|Puebla MH - Mexico|Queretaro MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 1474-7065 UR - ISI:000221832000022 L2 - EME emission;piezoeffect;micro fracturing;earthquake SO - Physics and Chemistry of the Earth 2004 ;29(4-9):463-472 10916 UI - 4074 AU - Gevorkian G AU - Petrushina I AU - Manoutcharian K AU - Ghochikyan A AU - Acero G AU - Vasilevko V AU - Cribbs DH AU - Agadjanyan MG AD - Inst Mol Med, Dept Immunol, Huntington Beach, CA 92649, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Calif Irvine, Inst Brain Aging & Dementia, Irvine, CA 92697, USAAgadjanyan, MG, Inst Mol Med, Dept Immunol, 16371 Gothard St, Huntington Beach, CA 92649 USA TI - Mimotopes of. conformational epitopes in fibrillar beta-amyloid AB - In Alzheimer's disease (AD) p-amyloid peptide accumulates in the brain in different forms including fibrils. Amyloid fibrils could be recognized as foreign by the mature immune system since they are not present during its development. Thus, using mouse antisera raised against the fibrillar form of Abeta(42), we have screened two phage peptide libraries for the presence of foreign conformational mimotopes of Abeta. Antisera from wild type animals recognized predominately peptides with the EFRH motif from Abeta(42) sequence, whereas amyloid precursor protein (APP) transgenic mice recognized mainly phage clones that mimic epitopes (mimotopes) within the fibrillar Abeta(42) but lack sequence homology with this peptide. (C) 2004 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Neurosciences U5 - J;Article AV - English IS - 0165-5728 UR - ISI:000224669800003 L2 - antibodies;transgenic mice;antigens;epitopes;mimotopes;immunotherapy;PHAGE-DISPLAYED MIMOTOPES; ALZHEIMERS-DISEASE; IMMUNE-RESPONSE; MOUSE MODEL; PEPTIDE; ANTIBODIES; VACCINATION; IMMUNOTHERAPY; IMMUNIZATION; HYPOTHESIS SO - Journal of Neuroimmunology 2004 ;156(1-2):10-20 10917 UI - 5755 AU - Ghetta A AU - Matus-Ortega M AU - Garcia-Mena J AU - Deho G AU - Tortora P AU - Regonesi ME AD - Univ Milan, Dipartimento Biotecnol & Biosci, I-20126 Milan, ItalyCINVESTAV, IPN, Dept Genet & Biol Mol, Mexico City 07000, DF, MexicoUniv Milan, Dipartimento Sci Biomol & Biotecnol, I-20133 Milan, ItalyTortora, P, Univ Milan, Dipartimento Biotecnol & Biosci, Piazza Sci 2, I-20126 Milan, Italy TI - Polynucleotide phosphorylase-based photometric assay for inorganic phosphate AB - Polynucleotide phosphorylase is a prokaryotic enzyme that catalyzes phosphorolysis of polynucleotides with release of nuclectide diphosphates. By taking advantage of this property, we developed a photometric assay for inorganic phosphate. In the presence of polyadenylic acid, phosphate is converted into adenosine 5'-diphosphate (ADP) by this enzyme. ADP then reacts with phosphoeno/pyruvate in a pyruvate kinase-catalyzed reaction, thus giving rise to adenosine 5'-triphosphate and pyruvate. Finally, pyruvate oxidizes reduced nicotinamide adenine dinucleotide (NADH) through the action of L-lactate dehydrogenase, with concomitant decrease in absorbance at 340 nm. As expected, in this detection system 1 mol of NADH was oxidized per mole of phosphate. The assay showed an excellent reproducibility, as the standard deviations never exceeded 5%. It also was shown to be unaffected by several compounds that are regarded as major interferents of the traditional colorimetric assays. Absence of interference was also demonstrated when determining phosphate content in different biological samples, such as human serum and perchloric acid extracts from Escherichia coli, yeast, and bovine liver. An E coli strain overexpressing His-tagged polynucleotide phosphorylase developed in our laboratories allowed quick and straightforward purification of enzyme, making the assay feasible and convenient. Since all other reagents required are inexpensive, the assay represents a cheaper alternative to commercially available phosphate assay kits. (C) 2004 Elsevier Inc. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Chemistry, Analytical U5 - J;Article AV - English IS - 0003-2697 UR - ISI:000220791200008 L2 - polynucleotide phosphorylase;phosphate assay;Escherichia coli;ESCHERICHIA-COLI; ORTHOPHOSPHATE ANALYSIS; SUBBAROW METHOD; INTERFERENCE; ATP; FISKE SO - Analytical Biochemistry 2004 ;327(2):209-214 10918 UI - 6042 AU - Ghigo G AU - Maranzana A AU - Tonachini G AU - Zicovich-Wilson CM AU - Causa M AD - Univ Turin, Dipartimento Chim Generale & Organ Applicata, I-10125 Turin, ItalyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Piemont Orientale, DISTA, I-15100 Alessandria, ItalyTonachini, G, Univ Turin, Dipartimento Chim Generale & Organ Applicata, Corso Massimo DAzeglio 48, I-10125 Turin, Italy TI - Modeling soot and its functionalization under atmospheric or combustion conditions by density functional theory within molecular (polycyclic-aromatic-hydrocarbon-like) and periodic methodologies AB - Graphite, and particularly defective graphite, is chosen to model soot particles. Quantum mechanical calculations are first carried out on molecular polycyclic-aromatic-hydrocarbon-type systems and then extended to a periodic representation of one graphite layer. The features of the interaction of H, HO, NO, NO2, and NO3 with these model systems are examined, with the aim of defining a suitable representation of the atmospheric or combustion gas-solid interactions by which functionalization reactions can take place. The more interesting interactions with small reactive molecules regard the edge of the graphene sheet and the in-plane carbon vacancies. While these interactions can be well described by sufficiently extended molecular models, periodic models are necessary to describe accurately the equilibrium geometries because they introduce the necessary geometric constraints. The ability of a graphene sheet to easily accommodate unpaired electrons in sigma or pi orbitals is the basis for its interesting interactions with the small molecules present in tropospheric chemistry or combustion processes MH - Italy MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000220093900017 L2 - HARTREE-FOCK CALCULATIONS; VALENCE BASIS-SETS; VAN-DER-WAALS; ORBITAL METHODS; AB-INITIO; HETEROGENEOUS REACTION; CARTESIAN GAUSSIANS; BENZENE OXIDATION; 2ND-ROW ELEMENTS; ELECTRON-DENSITY SO - Journal of Physical Chemistry B 2004 ;108(10):3215-3223 10919 UI - 5605 AU - Ghinaglia LT AU - Herrera-Silveira JA AU - Comin FA AD - Univ Oriente, Escuela Ciencias Aplicadas Mar, Boca De Rio, Isla Margarita, VenezuelaCINVESTAV, IPN, Unidad Merida, Merida, Yucatan, MexicoCSIC, Inst Pirenaico Ecol, Zaragoza 50059, SpainGhinaglia, LT, Univ Oriente, Escuela Ciencias Aplicadas Mar, Boca De Rio, Isla Margarita, Venezuela TI - Structural variations of phytoplankton in the coastal seas of Yucatan, Mexico AB - A study was done of the relationship between hydrographic variables and the composition, abundance, community structure and biomass spectrums of coastal phytoplankton at scales greater than 100 km on the Yucatan Peninsula ( SE Gulf of Mexico). This was done during the season of greatest environmental instability in the region, the northwind season ( late fall to winter). Samples were collected at stations in the west (Campeche), north (Yucatan), and east (Quintana Roo) zones of the Peninsula. Measurements were taken of temperature, salinity, dissolved oxygen, dissolved inorganic nutrients ( ammonia, nitrite, nitrate and phosphate) and chlorophyll a, and samples were taken for phytoplankton analysis. The hydrographic results showed the Campeche zone as having the lowest salinity (<35 psu) values, as well as the highest inorganic nutrient and chlorophyll a values, all of which are related to continental water contributions. The Yucatan zone had the lowest temperatures and the lowest inorganic nutrient values, indicating influence from the Yucatan Current and the Gulf of Mexico. A total of 159 phytoplankton species were identified, dominated by diatoms (>80%) and dinoflagellates. Phytoplankton exhibited greater concentration, richness, equitability and diversity in Campeche, while the lowest community structure values were had in the Quintana Roo zone. The ordination analysis demonstrated that the dominant genera were the diatoms Chaetoceros, Pseudonitzschia and Thalassionema. The biomass spectrums exhibited the lowest slope in environments of higher heterogeneity, with Campeche being the most disturbed and heterogeneous zone and Quintana Roo that with the least heterogeneity MH - Mexico|Yucatan MH - Spain MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000221203100009 L2 - microphytoplankton;coastal ecosystems;community structure;hydrology;environmental heterogeneity;Yucatan peninsula;GULF-OF-MEXICO; SPATIAL CHARACTERIZATION; MULTIVARIATE ANALYSES; AQUATIC ECOSYSTEMS; SIZE DISTRIBUTION; UPWELLING AREAS; LARGE LAKE; BIOMASS; PLANKTON; BAY SO - Hydrobiologia 2004 ;519(1-3):85-102 10920 UI - 5133 AU - Gieraltowski J AU - Fessant A AU - Valenzuela R AU - Tannous C AD - CNRS, UBO, LMB, UMR 6135, F-29285 Brest, FranceNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoGieraltowski, J, CNRS, UBO, LMB, UMR 6135, BP 809, F-29285 Brest, France TI - Giant magnetoimpedance in Vitrovac((R)) amorphous ribbons over [0.3-400 MHz] frequency range AB - Giant magneto impedance (GMI) effect for as-cast Vitrovac(R) amorphous ribbons (Vacuumschmelze, Germany) in two configurations (parallel and normal to the ribbon long axis) is studied over the frequency range [0.3-400 MHz] and under static magnetic fields - 160 Oe= m(m+1) AB - It has been long conjectured that the crossing number of C-m x C-n is (m - 2)n, for all m, n such that n greater than or equal to m greater than or equal to 3. In this paper, it is shown that if n greater than or equal to m(m + 1) and m greater than or equal to 3, then this conjecture holds. That is, the crossing number of C-m x C-n is as conjectured for all but finitely many n, for each m. The proof is largely based on techniques from the theory of arrangements, introduced by Adamsson and further developed by Adamsson and Richter. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Russia PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 11 U4 - Mathematics U5 - J;Article AV - English IS - 0364-9024 UR - ISI:000223382300005 L2 - crossing number;Cartesian product of cycles;graph drawing;CRITICAL GRAPHS; PATH-WIDTH SO - Journal of Graph Theory 2004 ;47(1):53-72 10929 UI - 6090 AU - Glot A AU - Di Bartolomeo E AU - Gaponov A AU - Polini R AU - Traversa E AD - Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, I-00133 Rome, ItalyUniv Tecnol Mixteca, Inst Elect & Computac, Oaxaca 69000, MexicoDniepropetrovsk Natl Univ, Dept Radioelect, UA-49050 Dnepropetrovsk, UkrainePolini, R, Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, Via Ric Sci, I-00133 Rome, Italy TI - Degradation of oxide varistor ceramics in air atmosphere containing NO2 at elevated temperatures AB - The heat treatment of commercial zinc oxide based varistor ceramics at temperatures of 200-300 degreesC in air with 1000 ppm of NO2 causes strong shift of voltage-current characteristic (VCC) to low voltages. Subsequent exposure to pure air leads to partial restoration of VCC. Scanning electron microscopy analysis showed microstructural changes of samples after heat treatment in air with 1000 ppm of NO2. Chemical reactions between NO2 molecules and oxygen chemisorbed or Bi-rich oxide phases at grain boundaries followed by the lowering of grain boundary potential barriers can be the reason of observed degradation. (C) 2003 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Oaxaca MH - Ukraine PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000189247800064 L2 - grain boundary;NO2;sensors;varistors;ZnO SO - Journal of the European Ceramic Society 2004 ;24(6):1213-1216 10930 UI - 3585 AU - Gochis DJ AU - Jimenez A AU - Watts CJ AU - Garatuza-Payan J AU - Shuttleworth WJ AD - Natl Ctr Atmospher Res, Res Applicat Program, Adv Study Program, Boulder, CO 80307, USAInst Medio Ambiente & Desarrollo Sustentable, Hermosillo, Sonora, MexicoInst Tecnol Sonora, Obregon, Sonora, MexicoUniv Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721, USAGochis, DJ, Natl Ctr Atmospher Res, Res Applicat Program, Adv Study Program, POB 3000, Boulder, CO 80307 USA TI - Analysis of 2002 and 2003 warm-season precipitation from the North American monsoon experiment Event Rain Gauge Network AB - Analyses of rainfall characteristics and their linkage to physiographic features are made from the North American monsoon experiment (NAME) Event Rain Gauge Network (NERN) in northwest Mexico. The findings are based on the network configuration for the 2002 and 2003 warm seasons. Despite the relatively short record used, a clearer structure of core-region monsoon rainfall is beginning to emerge. In agreement with earlier, coarser-scale studies, the seasonal precipitation maximum overlies the western slope of the Sierra Madre Occidental but does not strictly parallel a particular elevation band. It is shown that the distance to the Gulf of California and, potentially, the configuration of the terrain profile may also play an important role in determining where the axis of maximum precipitation lies. The diurnal cycles of precipitation frequency and intensity are shown to have distinct relationships to terrain elevation that are qualitatively similar to those observed over the Front Range of the Rocky Mountains in the central-western United States. The relationship between precipitation and gulf surge events occurring during the summer of 2003 is also explored MH - USA MH - Mexico|Sonora PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0027-0644 UR - ISI:000225807000014 L2 - GULF-OF-CALIFORNIA; SOUTHWESTERN UNITED-STATES; SUMMER MONSOON; VARIABILITY; MEXICO; SYSTEM; CLIMATOLOGY; REANALYSIS; SURGES; REGIME SO - Monthly Weather Review 2004 ;132(12):2938-2953 10931 UI - 6093 AU - Godinez CE AU - Zepeda G AU - Mortko CJ AU - Dang H AU - Garcia-Garibay MA AD - Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAIPN, Dept Quim Organ, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoGarcia-Garibay, MA, Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA TI - Molecular crystals with moving parts: Synthesis, characterization, and crystal packing of molecular gyroscopes with methyl-substituted triptycyl frames AB - We report a highly convergent synthesis for the preparation of molecular gyroscopes consisting of para-phenylene rotors linked by triple bonds to methyl-substituted triptycenes acting as pivots and encapsulating frames. The desired 1,4-bis[2-(2,3,6,7,12,13-hexamethyl-10-alkyl-9-triptycyl)ethynyl] benzenes were prepared from 2,3-dimethyl-1,3-butadiene using Diels-Alder cycloadditions and Pd(0)-catalyzed coupling as the key reactions. The main challenge in the synthesis came about in the preparation of 9-alkynyl-triptycenes by Diels-Alder reaction of benzynes and 9-alkynyl-2,3,6,7-tetramethylanthracenes. These reactions occurred with chemical yields and regioselectivities that were strongly influenced by steric and electronic effects of substituents at C 10 of the anthracene core. Anthracenes with methyl, propyl, and phenyl substituents were utilized to complete the synthesis of their corresponding molecular gyroscopes, and their solid-state structures were determined by single-crystal X-ray diffraction analysis. Examination of these results indicated that, as expected, the bulky triptycyl groups encourage crystallization motifs that create more free volume around the phenylene rotor, as needed to facilitate fast gyroscopic motion in the solid state MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 32 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000189278900032 L2 - ACETYLENIC DERIVATIVES; REACTIVITY; POLYMERIZATION; HYDROGEN; DESIGN; 9-ETHYNYLANTHRACENE; INFORMATION; PARAMETERS; CHEMISTRY; DYNAMICS SO - Journal of Organic Chemistry 2004 ;69(5):1652-1662 10932 UI - 5354 AU - Godinez F AU - Hutter D AU - Monroy R AD - ITESM Monterrey, Ctr Intelligent Syst, Monterrey 64849, Mexico. Univ Saarbrucken, DFKI, D-66123 Saarbrucken, Germany. ITESM Estado Mexico, Dept Comp Sci, Mexico City 52926, DF, Mexico TI - Attribute reduction for effective intrusion detection AB - Computer intrusion detection is to do with identifying computer activities that may compromise the integrity, confidentiality or the availability of an IT system. Anomaly Intrusion Detection Systems (IDSs) aim at distinguishing an abnormal activity from an ordinary one. However, even in a moderate site, computer activity very quickly yields Giga-bytes of information, overwhelming current IDSs. To make anomaly intrusion detection feasible, this paper advocates the use of Rough Sets previous to the intrusion detector, in order to filter out redundant, spurious information. Using rough sets, we have been able to successfully identify pieces of information that succinctly characterise computer activity without missing chief details. The results are very promising since we were able to reduce the number of attributes by a factor of 3 resulting in a 66% of data reduction. We have tested our approach using BSM log files borrowed from the DARPA repository MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon T3 - ADVANCES IN WEB INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlefgodinez@itesm.mx hutter@dfki.de raulm@itesm.mx2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBAE37 AV - English IS - 0302-9743 UR - ISI:000221807000008 SO - 2004 ;():74-83 10933 UI - 5108 AU - Godovsky YK AU - Brezesinski G AU - Ruiz-Garcia J AU - Mohwald H AU - Jensen TR AU - Kjaer K AU - Makarova NN AD - Karpov Inst Phys Chem, Moscow 105064, RussiaMax Planck Inst Colloids & Interfaces, D-14476 Golm Potsdam, GermanyRiso Natl Lab, Condensed Matter Phys & Chem Dept, DK-4000 Roskilde, DenmarkRiso Natl Lab, Dept Mat Res, DK-4000 Roskilde, DenmarkAarhus Univ, Dept Chem, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus C, DenmarkRussian Acad Sci, Nesmeyanov Inst Elementoorgan Cpds, Moscow 117813, RussiaUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoGodovsky, YK, Karpov Inst Phys Chem, Vorontsovo Pole Str 10, Moscow 105064, Russia TI - Stepwise collapse of cyclolinear polysiloxane langmuir monolayers studied by Brewster angle microscopy and grazing incidence X-ray diffraction AB - The surface-pressure-induced layering transition of a 2D nematic-like cyclolinear polyorganosiloxane that consists of six-membered rings of silicon and oxygen joined by oxygen bridges and that has phenyl side groups (CL-PMPhSi) is observed and characterized by film balance measurements, Brewster angle microscopy (BAM), and grazing incidence X-ray diffraction (GIXD) at the air/water interface. In the uncompressed state, A less than or equal to 95 Angstrom(2)/monomer and pi approximate to 0, BAM images demonstrate partial surface coverage by solidlike birefringent islands, supporting the previously suggested model of extended aligned polymer chains lying parallel to the water surface in a quasi-two-dimensional "nematic-like" liquid-crystalline arrangement. Further compression, A less than or equal to 95 Angstrom(2)/monomer, leads to a complete and uniform monolayer coverage of the surface followed by layer-by layer growth visible as stepwise increasing surface pressure. GIXD reveal one diffraction peak for monolayer as well as multilayer samples of CL-PMPhSi with a d-spacing of d = (10.5 +/- 0.1) Angstrom. The maximum Bragg rod intensity is observed at q(z) approximate to 0 for the monolayer but moved to a well-defined nonzero q(z) value for the multilayer samples. We infer that there are planes in the structure of the CL-PMPhSi multilayers tilted by ca. 27degrees from the surface normal. For both mono- and multilayers, the analysis of the observed GIXD peak widths indicates that the extent of the lateral positional correlation between parallel chains ranges from about 12 for the monolayer to about 30 interchain distances in multilayers, implying some mesoscale order similar to a quasi-long-range order. Analysis of the Bragg rods allowed us to estimate the thickness of the monolayer and multilayers. Comparison of the data with independent results of molecular modeling, X-ray reflectivity, and atomic force microscopy gave very good agreement. As a result of the analysis we conclude that both in-plane and out-of-plane GIXD data reveal a high degree of stable structural order of the CL-PMPhSi films MH - Denmark MH - Germany MH - Mexico|San Luis Potosi MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000222258600019 L2 - AIR-WATER-INTERFACE; ATOMIC-FORCE MICROSCOPY; 2-DIMENSIONAL MONOMOLECULAR FILMS; SMECTIC LIQUID-CRYSTALS; PHASE-TRANSITIONS; THIN-FILMS; 3-DIMENSIONAL STRUCTURES; MULTIMOLECULAR FILMS; LAYERING TRANSITIONS; MULTILAYER FORMATION SO - Macromolecules 2004 ;37(13):4872-4881 10934 UI - 833 AU - Goericke R AU - Venrick E AU - Mantyla A AU - Bograd SJ AU - Schwing FB AU - Huyer A AU - Smith RL AU - Wheeler PA AU - Hooff R AU - Peterson WT AU - Gaxiola-Castro G AU - Gomez-Valdes J AU - Lavaniegos BE AU - Hyrenbach KD AU - Sydeman WJ AD - Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093, USAOregon State Univ, Hatfield Marine Sci Ctr, Cooperat Inst Marine Resource Studies, Newport, OR 97365, USACtr Invest Cient & Educ Super Ensenada, Dept Oceanog Biol, Ensenada 22860, Baja California, MexicoNOAA, Pacific Fisheries Environm Lab, Natl Marine Fisheries Serv, Pacific Grove, CA 93950, USAOregon State Univ, Hatfield Marine Sci Ctr, Natl Marine Fisheries Serv, NW Fisheries Sci Ctr, Newport, OR 97365, USAOregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331, USACtr Invest Cient & Educ Super Ensenada, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoPoint Reyes Bird Observ, Marine Ecol Div, Conservat Sci Program, Stinson Beach, CA 94970, USAGoericke, R, Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, 9500 Gilman Dr, La Jolla, CA 92093 USA TI - The state of the California Current, 2003-2004: A rare "normal" year AB - This report describes the state of the California Current System (CCS)-meteorological, physical, chemical, and biological-from January 2003 to the spring of 2004. The area covered in this report ranges from Oregon coastal waters to southern Baja California. Over the past year, most physical, chemical, and biological parameters were close to their climatological mean. Contributing to such "normal" conditions was the absence of a La Nina that had been expected after the previous year's El Nino. Noteworthy, however, are the cold and fresh anomalies in the upper 100-200 m that have been found over large areas of the CCS since 2002. Off Oregon these may have been responsible for increased productivity; off southern California these were associated with shallower nutriclines and subsurface chlorophyll maxima in the offshore areas. It is unclear if these anomalies are ephemeral or related to long-term changes in ocean climate. The effects of the hypothesized 1998 "regime shift" on the CCS are still difficult to discern, primarily because of other physical forcing varying on different time scales (e.g., El Nino/Southern Oscillation, ENSO, cycles; the "subarctic influence"; global warming). The resolution of many of these issues requires larger scale observations than are available now. Establishment of the Pacific Coast Ocean Observing System (PaCOOS) under the guidance of NOAA will be a crucial step toward achieving that goal MH - USA MH - Mexico|Baja California PB - LA JOLLA: SCRIPPS INST OCEANOGRAPHY RP - NOT IN FILE U3 - TC 3 U4 - Fisheries U5 - J;Article AV - English IS - 0575-3317 UR - ISI:000232939700003 L2 - SUB-ARCTIC INFLUENCE; CURRENT SYSTEM; CLIMATE-CHANGE; PACIFIC-OCEAN; NORTHEAST PACIFIC; COLD HALOCLINE; CENTRAL OREGON; MARINE BIRD; WATER; DIET SO - California Cooperative Oceanic Fisheries Investigations Reports 2004 ;45():27-59 10935 UI - 4873 AU - Goguitchaichvili A AU - Soler AM AU - Zanella E AU - Chiari G AU - Lanza R AU - Urrutia-Fucugauchi J AU - Gonzalez T AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Turin, Dipartimento Sci Terra, I-10125 Turin, ItalyGetty Conservat Inst, Los Angeles, CA 90049, USAGoguitchaichvili, A, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Pre-columbian mural paintings from Mesoamerica as geomagnetic field recorders AB - This paper reports a reconnaissance archeomagnetic study of mural paintings in various pre-Columbian sites in Mexico. The magnetic measurements of the pigments show that at least four murals (sites: Cacaxtla, Cholula and Templo Mayor) retain a remanent magnetization carried by a mixture of magnetite and minor hematite grains. In most specimens, a characteristic remanent magnetization is successfully isolated by alternating field demagnetization. The mean directions are reasonably well determined for each mural and within the range of secular variation during the last centuries. Studied Mesoamerican murals apparently retain the direction of the magnetic field at the time they were painted and therefore are an invaluable source of information concerning its secular variation. The archeomagnetic study of pre-Columbian mural paintings opens new alternatives to drawing a reliable reference master curve for the region and may largely contribute to the Mesoamerican absolute chronology MH - Italy MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000222774400006 SO - Geophysical Research Letters 2004 ;31(12): 10936 UI - 3519 AU - Goltsev A AU - Kussul E AU - Baidyk T AD - Ukrainian Acad Sci, Cybernet Ctr, Kiev, UkraineUNAM, Ctr Appl Sci & Technol Dev, Mexico City, DF, MexicoGoltsev, A, Ukrainian Acad Sci, Cybernet Ctr, Kiev, Ukraine TI - A process of differentiation in the assembly neural network AB - An assembly neural network model is described. The network is artificially partitioned into several sub-networks according to the number of classes that the network has to recognize. In the process of primary learning Hebb's neural assemblies are formed in the sub-networks by means of modification of connections' weights. Then, a differentiation process is executed which significantly improves the recognition accuracy of the network. A computer simulation of the assembly network is performed with the aid of which the differentiation process is studied in a set of experiments on a character recognition task using two types of separate handwritten characters: Ukrainian letters and Arabic numerals of MNIST database MH - Mexico|Distrito Federal MH - Ukraine PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000225878300069 L2 - TEXTURE SEGMENTATION SO - Neural Information Processing 2004 ;3316():452-457 10937 UI - 5435 AU - Gomez-Camacho J AU - Lemus R AU - Arias JM AD - Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGomez-Camacho, J, Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, Apartado 1065, E-41080 Seville, Spain TI - Matrix elements of u and p for the modified Nischl-Teller potential AB - Closed analytical expressions in terms of a single sum are obtained for the matrix elements of the momentum and the natural variable u = tanh(alphax) in the basis of the modified Poschl-Teller (MPT) bound eigenstates. These matrix elements are first expressed in terms of Franck-Condon factors, which thereafter are substituted for analytic expressions. Expansions of the variables p and u in terms of creation and annihilation operators associated with the MPT bound eigenfunctions are also presented MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000221570800011 SO - Journal of Physics A-Mathematical and General 2004 ;37(19):5237-5242 10938 UI - 5036 AU - Gomez-Gil B AU - Soto-Rodriguez S AU - Garcia-Gasca A AU - Roque A AU - Vazquez-Juarez R AU - Thompson FL AU - Swings J AD - CIAD Mazatlan Unit Aquaculture, Mexico City 82000, DF, MexicoCIBNOR, La Paz 23090, CA, MexicoState Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumGomez-Gil, B, CIAD Mazatlan Unit Aquaculture, AP 711, Mexico City 82000, DF, Mexico TI - Molecular identification of Vibrio harveyi-related isolates associated with diseased aquatic organisms AB - Fifty strains belonging to Vibrio harveyi, Vibrio campbellii, and the recently described Vibrio rotiferianus, were analysed using phenotypic and genomic techniques with the aim of analysing the usefulness of the different techniques for the identification of V. harveyi-related species. The species V harveyi and V. campbellii were phenotypically indistinguishable by more than 100 phenotypic features. Thirty-nine experimental strains were phenotypically identified as V. harveyi, but FAFLP, REP-PCR, IGS-PCR and DNA-DNA hybridization proved that they in fact belong to the species V. campbellii. Similar groupings were found among all fingerprinting methodologies (except IGS-PCR). Thirty-two experimental strains clustered with the V. campbellii type and one reference strain; seven strains clustered with the V. harveyi type and three reference strains; and the type and four reference strains of V. rotiferianus grouped together, The correlations between DNA-DNA hybridization and the genomic fingerprinting by FAFLP and (GTG)(5)-PCR were found to be above 0(.)68 and statistically significant, suggesting the value of the latter techniques for the reliable identification of V. harveyi-related species. The results presented indicate that strains phenotypically identified as V. harveyi are in fact V. campbellii; these findings position V campbellii as an important species involved in diseases of reared aquatic organisms MH - Belgium MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 36 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000222437300018 L2 - FRAGMENT LENGTH POLYMORPHISM; REPETITIVE DNA-SEQUENCES; MARINE LUMINOUS BACTERIA; RDNA INTERGENIC SPACERS; PENAEUS-MONODON LARVAE; AD-HOC-COMMITTEE; SP-NOV.; BRADYRHIZOBIUM STRAINS; PCR; AFLP SO - Microbiology-Sgm 2004 ;150():1769-1777 10939 UI - 6153 AU - Gomez-Gil B AU - Thompson FL AU - Thompson CC AU - Garcia-Gasca A AU - Roque A AU - Swings J AD - CIAD, Mazatlan Unit Aquaculture, Sinaloa 82000, MexicoState Univ Ghent, Microbiol Lab, B-9000 Ghent, BelgiumState Univ Ghent, BCCM, LMG Bacteria Collect, Microbiol Lab, B-9000 Ghent, BelgiumGomez-Gil, B, CIAD, Mazatlan Unit Aquaculture, AP 711, Sinaloa 82000, Mexico TI - Vibrio hispanicus sp nov., isolated from Artemia sp and sea water in Spain AB - Three Gram-negative, small, motile, rod-shaped bacteria were isolated from Artemia sp. and sea water in Barcelona, Spain, during 1990 and 1991. They were fermentative, oxidase-positive, sensitive to vibriostatic agent O/129, arginine dihydrolase-positive, lysine and ornithine decarboxylase-negative and grew in the absence of NaCl. They differed from phenotypically related species by their ability to grow at 4 degreesC and utilize L-rhamnose. Cloning of the 16S rRNA gene of the type strain produced two different 16S rRNA gene sequences, which differed by 15 bases (0(.)99 %); comparison of these sequences with those deposited in GenBank showed close relationships with Vibrio proteolyticus (97(.)6 % similarity), Vibrio diazotrophicus (97.9 %), Vibrio campbellii (96(.)8 %) and Vibrio alginolyticus (96.8 %), among others. DNA-DNA hybridization levels with the closest phylogenetically related Vibrio species were <26(.)4 %. Sufficient evidence is provided to support the identity of the three strains analysed as members of a novel species of the genus Vibrio, for which the name Vibrio hispanicus sp. nov. is proposed, with the type strain LMG 13240(T) (= CAM 525(T) = VIB 213(T)) MH - Belgium MH - Mexico|Sinaloa PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000189154700038 L2 - HETEROTROPHIC MARINE-BACTERIA; BRINE SHRIMP ARTEMIA; IDENTIFICATION; ACID; DIVERSITY; SYSTEMS; NAUPLII SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():261-265 10940 UI - 5905 AU - Gomez-Lagunas F AU - Islas L AD - UNAM, Mexico City, DF, MexicoUniv Washington, Seattle, WA 98195, USA TI - Block of delayed rectifier Shah K+ channels by external Ca++ ions MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000187971202774 SO - Biophysical Journal 2004 ;86(1):537A-538A 10941 UI - 4088 AU - Gomez-Lim MA AU - Litz RE AD - CINVESTAV, Unidad Irapuato, Irapuato 36500, MexicoUniv Florida, Ctr Trop Res & Educ, Homestead, FL 33031, USAGomez-Lim, MA, CINVESTAV, Unidad Irapuato, Km 9-6 Carretera Irapuato Leon,Apartado Postal 62, Irapuato GTO 36500, Mexico TI - Genetic transformation of perennial tropical fruits AB - Genetic transformation provides the means for modifying single horticultural traits in perennial plant cultivars without altering their phenotype. This capability is particularly valuable for perennial plants and tree species in which development of new cultivars is often hampered by their long generation time, high levels of heterozygosity, nucellar embryony, etc. Most of these conditions apply to many tropical and subtropical fruit crops. Targeting specific gene traits is predicated upon the ability to regenerate elite selections of what are generally trees from cell and tissue cultures. The integrity of the clone would thereby remain unchanged except for the altered trait. This review provides an overview of the genetic transformation of perennial tropical and subtropical fruit crops, i.e., citrus (Citrus spp.), banana and plantain (Musa groups AAA, AAB, ABB, etc.), mango (Mangifera indica L.), pineapple (Ananas comosus L.), avocado (Persea americana Mill.), passion fruit (Passiflora edulis L.), longan (Dimocarpus longan Lour.), and litchi (Litchi chinensis Sonn.) MH - Mexico|Guanajuato MH - USA PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Cell Biology;Developmental Biology U5 - J;Review AV - English IS - 1054-5476 UR - ISI:000224729100004 L2 - avocado;banana;genetic transformation;mango;tropical fruits;AGROBACTERIUM-MEDIATED TRANSFORMATION; EMBRYOGENIC-CELL SUSPENSIONS; GREEN FLUORESCENT PROTEIN; CITRUS TRISTEZA VIRUS; MANGO SOMATIC EMBRYOS; BANANA MUSA SPP.; CV GRAND NAIN; TRANSGENIC PLANTS; PARTICLE BOMBARDMENT; TISSUE-CULTURE SO - In Vitro Cellular & Developmental Biology-Plant 2004 ;40(5):442-449 10942 UI - 3757 AU - Gomez-Machorro C AU - Bennett KE AU - Munoz MD AU - Black WC AD - Colorado State Univ, Dept Microbiol Immunol & Pathol, Ft Collins, CO 80523, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Genet & Biol Mol, Mexico City 07000, DF, MexicoBlack, WC, Colorado State Univ, Dept Microbiol Immunol & Pathol, Ft Collins, CO 80523 USA TI - Quantitative trait loci affecting dengue midgut infection barriers in an advanced intercross line of Aedes aegypti AB - Quantitative trait loci (QTL) affecting the ability of the Aedes aegypti midgut to become infected with Dengue 2 virus (DEN2) were mapped in the F-5 generation of an advanced intercross line (AIL). A strain of Ae. aegypti previously selected for DEN2 susceptibility was crossed to a new strain selected for refractoriness to midgut infection. In P-1 and F-1 parents and 147 F-5 offspring, genotypes at forty-four cDNA loci were analysed. A new sex linked QTL and a second QTL on chromosome II with genotypes subject to balancing selection were detected that condition midgut susceptibility. Alleles at these QTL contributed additively in determining susceptibility and accounted for similar to24% of the phenotypic variance. Markers associated with a midgut escape barrier were inconsistently supported MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0962-1075 UR - ISI:000225488000008 L2 - Aedes aegypti;Dengue 2 virus;midgut infection barrier;quantitative trait loci;ANOPHELES-QUADRIMACULATUS COMPLEX; VECTOR COMPETENCE; INBRED STRAINS; ORAL INFECTION; LINKAGE MAP; MOSQUITO; VIRUS; SUSCEPTIBILITY; TRISERIATUS; DIPTERA SO - Insect Molecular Biology 2004 ;13(6):637-648 10943 UI - 3633 AU - Gomez-Mancilla J AU - Sinou JJ AU - Nosov VR AU - Thouverez F AU - Zambrano A AD - Ecole Cent Lyon, Lab Tibol & Dynam Syst, CNRS, UMR 5513,Equipe Dynam Syst & Struct, F-69134 Ecully, FranceInst Politecn Nacl, Lab Vibrac & Rotodinam, ESIME, Mexico City, DF, MexicoSinou, JJ, Ecole Cent Lyon, Lab Tibol & Dynam Syst, CNRS, UMR 5513,Equipe Dynam Syst & Struct, 36 Ave Guy Collongue, F-69134 Ecully, France TI - The influence of crack-imbalance orientation and orbital evolution for an extended cracked Jeffcott rotor AB - Vibration peaks occurring at rational fractions of the fundamental rotating critical speed, here named Local Resonances, facilitate cracked shaft detection during machine shut-down. A modified Jeffcott-rotor on journal bearings accounting for gravity effects and oscillating around nontrivial equilibrium points is employed. Modal parameter selection allows this linear model to represent first mode characteristics of real machines. Orbit evolution and vibration patterns are analyzed, yielding useful results. Crack detection results indicate that, instead of 1x and 2x components, analysis of the remaining local resonances should have priority; this is due to crack-residual imbalance interaction and to 2x multiple induced origins. Therefore, local resonances and orbital evolution around 1/2, 1/3 and 1/4 of the critical speed are emphasized for various crack-imbalance orientations. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Mechanics U5 - J;Article AV - English IS - 1631-0721 UR - ISI:000225789400002 L2 - vibrations;dynamic systems;rotor dynamics;crack detection;local resonance;extended Jeffcott rotor;orbital evolution;TRANSVERSE CRACK SO - Comptes Rendus Mecanique 2004 ;332(12):955-962 10944 UI - 6671 AU - Gomez-Pedrero JA AU - Quiroga JA AU - Servin M AD - Univ Complutense Madrid, Escuela Opt, Dept Opt, Madrid 28037, SpainUniv Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, SpainCtr Invest Opt AC, Leon 37000, Gto, MexicoGomez-Pedrero, JA, Univ Complutense Madrid, Escuela Opt, Dept Opt, Avda Arcos de Jalon S-N, Madrid 28037, Spain TI - Temporal evaluation of fringe patterns with spatial carrier with an improved asynchronous phase demodulation algorithm AB - A method for temporal evaluation of fringe patterns with a spatial carrier is presented. The proposed technique consists in the recording of the temporal irradiance fluctuations obtained when a linear variation of the set-up sensitivity is introduced. In this way, the use of a spatial carrier introduces a linear temporal carrier frequency. This allows the use of fast and low time consuming temporal asynchronous demodulation algorithms, similar to those employed in spatial phase shifting techniques. An existing five-step algorithm has been corrected for asynchronous demodulation. It is shown that it is possible to fix the sensitivity variation in such a way that the algorithm presents optimum behaviour against noise and nonlinearities presented by the temporal irradiance signal. Finally, the technique has been applied to measure the shape of an object, using a fringe projection set-up MH - Mexico|Guanajuato MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0950-0340 UR - ISI:000187327600008 L2 - SHAPE MEASUREMENT; INTERFEROMETRY; PROFILOMETRY; OBJECTS; ERRORS SO - Journal of Modern Optics 2004 ;51(1):97-109 10945 UI - 6232 AU - Gomez-Perales JE AU - Colvile RN AU - Nieuwenhuijsen MJ AU - Fernandez-Bremauntz A AU - Gutierrez-Avedoy VJ AU - Paramo-Figueroa VH AU - Blanco-Jimenez S AU - Bueno-Lopez E AU - Mandujano F AU - Bernabe-Cabanillas R AU - Ortiz-Segovia E AD - Univ London Imperial Coll Sci Technol & Med, Fac Life Sci, Dept Environm Sci & Technol, London SW7 2AZ, EnglandInst Nacl Ecol Reg & Global, Direcc Gen Invest Contaminac Urbana, Mexico City 04530, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Ctr Nacl Invest & Capicitac Ambiental, Inst Nacl Ecol, Mexico City 09340, DF, MexicoDirecc Gen Gest Ambiental Aire, Gobierno Dist Fed, Mexico City 11800, DF, MexicoGomez-Perales, JE, Univ London Imperial Coll Sci Technol & Med, Fac Life Sci, Dept Environm Sci & Technol, S Kensington Campus, London SW7 2AZ, England TI - Commuters' exposure to PM2.5, CO, and benzene in public transport in the metropolitan area of Mexico City AB - A survey was carried out to measure commuters' exposure to PM2.5, CO, benzene, and the chemical composition of PM2.5 on different routes and modes of transport in Mexico City. PM2.5 (n = 62), CO (n = 54) and benzene (n = 22) are presented from morning (6:30-9:30 a.m.) and evening (17:30-20:30) rush hours on minibuses, buses and Metro (underground or subway system). Three routes were selected from a previous commuters' exposure study covering some of the most important thoroughfares of the valley. For PM2.5, mass concentration was determined for all the samples. Nitrates, sulphates, inorganic elements and carbon fraction were analysed. CO was sampled using electrochemical sensors and 6-1 canisters with flow controller devices were used to collect integrated samples for benzene. Minibuses had a slightly higher geometric mean PM2.5 concentration in the morning than other modes of transport, but the ranking of geometric mean PM2.5 by mode of transport is opposite in the evening and the variability within modes is approximately double the difference between modes. The highest single measurement was a concentration of 137 mug m(-3) on a bus during an evening rush hour. The main component identified in PM2.5 was carbon. Carbon monoxide levels in this study were approximately 3 times lower than those found in a commuter exposure study conducted in 1991. A strong association was shown between wind speed and PM2.5 exposure in minibuses (r(2) = 0.50) and buses (r(2) = 0.54). The relationship between wind speed and CO exposure was strong only in minibuses (r(2) = 0.52). (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000189101800016 L2 - Mexico City;public transport;commuters' exposure;PM2.5;CO;benzene;VOLATILE ORGANIC-COMPOUNDS; HAZARDOUS AIR-POLLUTANTS; CARBON-MONOXIDE; PERSONAL EXPOSURE; HONG-KONG; MICROENVIRONMENTS; PARTICULATE; LONDON; MODES; URBAN SO - Atmospheric Environment 2004 ;38(8):1219-1229 10946 UI - 3567 AU - Gomez-Rodriguez A AU - Aragon JL AU - Torres M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Mexico City 76000, DF, MexicoConsejo Super Invest Cientificas, Inst Fis Aplicada, E-28006 Madrid, SpainAragon, JL, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Self-reciprocal redundant vector stars AB - In this work it is shown that a star of M vectors in R-n (M > n) is self-reciprocal. in the sense that it coincides with its Mackay generalized reciprocal star, if and only if it forms an eutactic star. We also show that eutactic stars behave in ways that resemble the behavior of orthonormal sets. A characterization of eutactic stars based on the Moore-Penrose pseudoinverse is presented MH - Mexico|Distrito Federal MH - Spain PB - MUNICH: R OLDENBOURG VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Crystallography U5 - J;Letter AV - English IS - 0044-2968 UR - ISI:000225827800001 L2 - eutactic stars;generalized reciprocal sets;pseudoinverses SO - Zeitschrift fur Kristallographie 2004 ;219(11):677-679 10947 UI - 5857 AU - Gomez-Torrente M AD - Univ Barcelona, ICREA, Barcelona 08028, SpainUniv Barcelona, Dept Logica, Barcelona 08028, SpainUNAM, Inst Invest Filosoficas, Mexico City 04510, DF, MexicoGomez-Torrente, M, Univ Barcelona, ICREA, Barcelona 08028, Spain TI - The indefinability of truth in the "Wahrheitsbegriff" AB - Contrary to what often seems to be the implicit belief, Tarski's 1933 version of the theorem on the indefinability of truth did not mention semantic notions, either defined or intuitive. I state this version in a somewhat modernized form and explain briefly the self-imposed mathematico-philosophical constraints that led Tarski to formulate it as he did. I also point out that close attention to its content suggests a refined view of the exact contrast between Tarski's achievement and Godel's achievement in his earlier discovery of another version of the result. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0168-0072 UR - ISI:000220572700005 L2 - truth;indefinability;Tarski;Godel SO - Annals of Pure and Applied Logic 2004 ;126(1-3):27-37 10948 UI - 5897 AU - Gomez FE AU - Cassis-Nosthas L AU - Morales-de-Leon JC AU - Bourges H AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Nutr Physiol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Food Sci & Technol, Mexico City, DF, MexicoGomez, FE, Univ Wisconsin, Dept Biochem, 433 Babcock Dr,Room 123, Madison, WI 53706 USA TI - Detection and recognition thresholds to the 4 basic tastes in Mexican patients with primary Sjogren's syndrome AB - Background: Primary Sjogren's syndrome (pSS) is a chronic autoimmune disease characterized by inflammatory lymphocytic infiltration of the salivary glands, leading to dryness of the mouth (xerostomia). It has been postulated that xerostomia is the preceding stage for the development of alterations in taste acuity (dysgeusia) in this type of patients. Objectives: To determine detection and recognition thresholds to the 4 basic tastes (sweet, salty, sour and bitter) in pSS patients and compare them to a control group. To determine if the long-term consumption of chile peppers and spicy Mexican diets had an effect on the taste perception and acuity of the pSS patients. Setting: This study was done in the Department of Food Science and Technology of the Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran (INCMNSZ), a third-level hospital in Mexico City. Subjects: The patient group consisted of 21 Mexican females (mean+/-s.d., age: 53.1 +/- 9.8 y) diagnosed with pSS (time of duration of the disease, 8.6 +/- 6.6 y, median 7 y, range 1-25 y) who were recruited at the outpatient service of the Department of Immunology and Rheumatology of the INCMNSZ. The control group consisted of 20 healthy nonsmokers age-matched Mexican women (50.3 +/- 11.9 y) most of them personnel of the INCMNSZ, and some friends and nonblood relatives to the patients (sisters-in-law) who volunteered to participate in the study. Interventions: Detection and recognition thresholds were determined by the method of least noticeable differences on three occasions during three nonconsecutive days. Saliva production was determined by Saxon's test on two separate occasions. Results: Although saliva production was severely reduced in pSS patients (1.35 +/- 0.55 ml/2 min, P < 0.001) compared to controls (6.26 &PLUSMN; 2.41 ml/2 min), all subjects recognized the 4 basic tastes when these were tested at suprathreshold concentrations. The detection thresholds for the sweet, sour and bitter tastes were higher in pSS patients, as well as the recognition thresholds for the salty, sour and bitter tastes. A relationship between time of evolution of the disease and saliva production with individual thresholds could not be established. Conclusions: pSS patients exhibited different degrees of dysgeusia depending on the taste being studied, that is, they were mildly dysgeusic for the sweet and salty tastes and clearly dysgeusic for the sour and bitter tastes. Although both pSS patients and controls had consumed 'typical Mexican diets' their entire lives, our results showed that the consumption of chile peppers and spicy foods did not have any effect on the taste perception and acuity of the pSS patients MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 2 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0954-3007 UR - ISI:000220427800010 L2 - primary Sjogren's syndrome;taste;thresholds;dysgeusia;saliva;Saxon's test;XEROSTOMIA; SALIVA; MANIFESTATIONS SO - European Journal of Clinical Nutrition 2004 ;58(4):629-636 10949 UI - 2195 AU - Gomez I AU - Scibek JJ AU - Sergi M AU - Riano L AU - Becerril B AU - Chaiken IM AD - Drexel Univ, Coll Med, Philadelphia, PA 19104, USAUNAM, Inst Biotecnol, Cuernavaca, Morelos, Mexico TI - Selection and characterization of scFv antibodies that binds to interleukin 5 and interleukin 5 receptor alpha using phage display MH - Mexico|Morelos MH - USA PB - WOODBURY: COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 0961-8368 UR - ISI:000224796100422 SO - Protein Science 2004 ;13():189-189 10950 UI - 3886 AU - Gomez JC AU - Fuentes O AU - Athanassoula L AU - Bosma A AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoObserv Marseille, F-13248 Marseille 4, FranceGomez, JC, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1, Puebla 72840, Mexico TI - Using evolution strategies to find a dynamical model of the M81 triplet AB - In this work we present Evolution Strategies (ES) as an efficient optimization method for dynamic modelling of the main interacting group of three galaxies in M81. The M81 group is one of the nearest groups of galaxies; its biggest galaxy, M81, sits in the core of the group together with its two companions M82 and NGC3077. The interaction among these three galaxies is very well defined in an image taken in HI. In this first attempt we use non-self-gravitating simulations for modelling dynamically the group; even with this restriction our method reproduces the density distribution of the three galaxies with great precision. Results presented here show that ES is an excellent method to find an accurate model of groups of interacting galaxies, where a global search for a large number of real-valued parameters needs to be performed MH - France MH - Mexico|Puebla PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224585500054 SO - Knowledge-Based Intelligent Information and Engineering Systems, Pt 3, Proceedings 2004 ;3215():404-410 10951 UI - 4016 AU - Gomez M AU - Clark RM AU - Nath SK AU - Bhatti S AU - Sharma R AU - Alonso E AU - Rasmussen A AU - Bidichandani SI AD - Univ Oklahoma, Hlth Sci Ctr, Dept Biochem & Mol Biol, Oklahoma City, OK 73104, USAUniv Oklahoma, Hlth Sci Ctr, Oklahoma Med Res Fdn, Oklahoma City, OK 73104, USAInst Nacl Neurol & Neurocirug Manuel Velasco Suar, Dept Neurogenet & Mol Biol, Mexico City, DF, MexicoUniv Oklahoma, Ctr Hlth Sci, Dept Pediat, Oklahoma City, OK 73104, USABidichandani, SI, Univ Oklahoma, Hlth Sci Ctr, Dept Biochem & Mol Biol, 975 NE,10th St BRC458, Oklahoma City, OK 73104 USA TI - Genetic admixture of European FRDA genes is the cause of Friedreich ataxia in the Mexican population AB - Friedreich ataxia accounts for similar to75% of European recessive ataxia patients. Approximately 98% of pathogenic chromosomes have large expansions of a GAA triplet repeat in the FRDA gene (E alleles), and strong linkage disequilibrium among polymorphisms spanning the FRDA locus indicates a common origin for all European E alleles. In contrast, we found that only 14 of 151 (9.3%) Mexican Mestizo patients with recessive ataxia were homozygous for E alleles. Analysis of polymorphisms spanning the FRDA locus revealed that all Mestizo E alleles had the common European haplotype, indicating that they share a single origin. Genetic admixture levels were determined, which revealed that the relative contributions to the Mestizo FRDA gene pool by Native American and European genes were 76-87% and 13-24%, respectively. commensurate with the observed low prevalence of Friedreich ataxia in Mestizos. This indicates that Friedreich ataxia in Mexican Mestizos is due to genetic admixture of European mutant FRDA genes in the Native American gene pool that existed prior to contact with Europeans. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0888-7543 UR - ISI:000224724900001 L2 - Friedreich ataxia;Mexican mestizo;genetic admixture;GAA triplet repeat;linkage disequilibrium;native American;Nahua;TRIPLET-REPEAT EXPANSION; TRINUCLEOTIDE REPEAT; MESTIZO POPULATION; MAXIMUM-LIKELIHOOD; MOLECULAR-DATA; FREQUENCIES; CITY; MUTATION; ORIGIN; JAPAN SO - Genomics 2004 ;84(5):779-784 10952 UI - 4554 AU - Gomez M AU - Persi P AU - Marenzi AR AU - Roth M AU - Tapia M AD - Observ Astron, RA-5000 Cordoba, ArgentinaCNR, Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, ItalyCarnegie Inst Washington, Las Campanas Observ, La Serena, ChileUNAM, Inst Astron, Ensenada 22830, Baja California, MexicoGomez, M, Observ Astron, Laprida 854, RA-5000 Cordoba, Argentina TI - A search for shock-excited molecular hydrogen knots in Chamaeleon I very low mass YSOs AB - We have obtained narrow-band images of three selected areas of the Chamaeleon I dark cloud which harbor very low mass young stars, centered on the H-2 and Brgamma lines and neighboring continuum as well as on the broad band K-s. One region is located in the northern part of the cloud, roughly coinciding with the densest area. The other two regions are in the southern section of the cloud. Our aim is to search for H-2 outflows associated with these objects. In the northern region, we found seven new H-2 knots, five of which are aligned in the direction of a previously known (CO)-C-12 molecular bipolar outflow. Further evidence that the class I low mass stellar object ISO-Chal 192 is the driving source of the molecular flow is given by the presence of a 960 AU long elongated structure at 2.2 mum emanating from this star and oriented parallel to the bipolar structure. Another pair of H, knots, although lying relatively nearby, is not aligned with the outflow direction. They are located on opposite sides of C1-6, a low mass class II object in the northern part of the Chamaeleon I dark cloud. In contrast, we fail to detect any H-2 emission object brighter than our sensitivity limit (similar to6 x 10(-32) W/m(2) Hz arcsec(2)) in the two southern areas of the cloud that also harbor several very low mass stars, including two transition stellar/sub-stellar objects. This negative result is probably not surprising in view of the extremely low accretion rates measured for brown dwarfs ((M) over dot similar to 10(-12)-10(-9) M-. yr(-1)). Deeper H-2 observations are required to better constraint the outflow event in sub-stellar objects MH - Argentina MH - Chile MH - Italy MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223621400029 L2 - stars : formation;stars : low-mass, brown dwarfs;ISM : jets and outflows;ISM : individual objects : Chamaeleon I;YOUNG STELLAR OBJECTS; MODEL SCATTERING ENVELOPES; HUBBLE-SPACE-TELESCOPE; NEAR-INFRARED IMAGES; HERBIG-HARO OBJECTS; DISK ACCRETION; TAURUS-AURIGA; BROWN DWARFS; DARK CLOUD; CIRCUMSTELLAR DISKS SO - Astronomy & Astrophysics 2004 ;423(2):629-641 10953 UI - 5253 AU - Gomez S AU - Fleeger JW AU - Rocha-Olivares A AU - Foltz D AD - Inst Ciencias Mar & Limnol, Mazatlan 82040, Sinaloa, MexicoLouisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803, USACtr Invest Cient & Educ Super Ensenada, Ensenada 22860, Baja California, MexicoGomez, S, Inst Ciencias Mar & Limnol, Joel Montes Camarena S-N,Ap Postal 811, Mazatlan 82040, Sinaloa, Mexico TI - Four new species of Cletocamptus Schmankewitsch, 1875, closely related to Cletocamptus deitersi (Richard, 1897) (Copepoda : Harpacticoida) AB - In 1897, Richard presented a brief and incomplete description of Mesochra (= Cletocamptus ) deitersi from a site in the Naposta Grande River in Argentina. Since Richard's description, C. deitersi has been reported from inland brines as well as coastal estuaries and mangroves from North, Central and South America, India, China, Ethiopia, Hawaii, Australia, Iran and Malaysia. However, there is ample evidence to support the hypothesis that all these records belong to new and as yet undescribed species. Erroneous identification of specimens attributed to C. deitersi has been due to a high degree of polymorphism within and between populations, to the incompleteness of Richard's original description, and to the fact that Richard did not archive material for future comparisons. Recently, the existence of four extremely differentiated molecular lineages in specimens of Cletocamptus collected from the Salton Sea (California, USA), Jackson (Alabama, USA), Port Fourchon (Louisiana, USA) and Mazatlan (Sinaloa, Mexico), all previously identified with C. deitersi , was observed. Morphological differences among these populations are subtle but congruent with the patterns of genetic differentiation, suggesting, in fact, that each of these lineages belongs to different species MH - Mexico|Baja California MH - Mexico|Sinaloa MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0022-2933 UR - ISI:000221933300001 L2 - Copepoda;Harpacticoida;Cletocamptus;taxonomy;USA;Mexico;HYDROCARBON CONTAMINATION; MEIOBENTHIC COPEPODS; COMMUNITIES; CRUSTACEA; MEIOFAUNA; MEXICO; RATES SO - Journal of Natural History 2004 ;38(21):2669-2732 10954 UI - 4255 AU - Gonneea ME AU - Paytan A AU - Herrera-Silveira JA AD - Stanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305, USAIPN, Ctr Invest & Estudios Avanzados, Yucatan, MexicoPaytan, A, Stanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305 USA TI - Tracing organic matter sources and carbon burial in mangrove sediments over the past 160 years AB - Mangrove ecosystems may be a source of organic carbon and nutrients to adjacent coastal systems on one hand and provide a sedimentary sink for organic carbon on the other. The balance between these two functions may be sensitive to both natural and anthropogenically induced variability, yet these effects have not been thoroughly evaluated in mangrove ecosystems. We determine organic matter sources and carbon burial rates over the past 160 years in three lagoons on the Yucatan Peninsula, Mexico. Carbon isotopes and C/N elemental ratios are utilized to trace the three sources contributing to sedimentary organic matter, mangroves, seagrasses and phytoplankton, while nitrogen isotopes are used to elucidate potential post-depositional biogeochemical transformations in mangrove lagoon sediments. All three organic matter sources contribute to organic carbon burial. Phytoplankton and mangroves are the dominant sources of organic matter in lagoon bank sediments and seagrasses are a significant source to central lagoon sediments. Organic carbon burial rates are higher at the lagoon fringes, where mangrove vegetation dominates, than in seagrass-dominated mid-lagoon areas. A reduction in mangrove contribution to the sedimentary organic matter pool concurrent with reduced total organic carbon burial rates is observed in the recent past at all three lagoons studied. Natural cycles in sediment organic matter source over the past 160 years are observed in a high-resolution core. These fluctuations correspond to climatic variability in this region, as recorded in deep-sea foraminiferal assemblages. Additional work is required in order to differentiate between recent anthropogenic perturbations and natural variability in organic carbon sources and burial rates within these ecosystems. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Yucatan MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000224169300002 L2 - mangrove;seagrass;sediment;organic carbon;carbon burial;organic matter;isotopes;NITROGEN-STABLE-ISOTOPES; TROPICAL COASTAL LAGOON; PENAEID PRAWNS; SALT MARSHES; C/N RATIOS; ESTUARY; MEXICO; INDICATORS; ECOSYSTEMS; DETRITUS SO - Estuarine Coastal and Shelf Science 2004 ;61(2):211-227 10955 UI - 6310 AU - Gonzales GF AU - Munoz G AU - Sanchez R AU - Henkel R AU - Gallegos-Avila G AU - az-Gutierrez O AU - Vigil P AU - Vasquez F AU - Kortebani G AU - Mazzolli A AU - Bustos-Obregon E AD - Univ Peruana Cayetano Heredia, Fac Sci & Philosophy, Dept Biol & Physiol Sci, Lima, PeruUniv Peruana Cayetano Heredia, LID, Lima, PeruUniv Simon Bolivar, Caracas, VenezuelaUniv La Frontera, Dept Preclin Sci, Temuco, ChileUniv Giessen, Dept Dermatol & Androl, Giessen, GermanyUniv Autonoma Nuevo Leon, Monterrey, MexicoPontificia Univ Catolica Chile, Santiago, ChileUniv Norte, Fac Med, Barranquilla, ColombiaCtr Inmunol Esterilidad & Reprod, Buenos Aires, DF, ArgentinaUniv Chile, Santiago, ChileGonzales, GF, Univ Peruana Cayetano Heredia, Fac Sci & Philosophy, Dept Biol & Physiol Sci, PO 1843, Lima, Peru TI - Update on the impact of Chlamydia trachomatis infection on male fertility AB - With approximately 90 million cases annually, infection with Chlamydia trachomatis is the most prevalent sexually transmitted bacterial disease in the world. Considering that these infections are often asymptomatic and cause major complications like acute pelvic inflammatory disease, ectopic pregnancy, infertility or infant pneumonia, the estimated costs for diagnosis and treatment in the USA amounts to 2.2 million US dollars for each 500 cases. Therefore, there is a high need for correct, quick and cost-effective diagnosis and treatment of this urogenital tract infection. New innovative therapies provide good results with regard to efficacy and patients' compliance. The success rates of treatments are at least 95%. However, the occurrence of antibiotic resistance should not be ignored and new treatment schemes must be developed. The state-of-the-art of diagnosis and treatment of chlamydial infections as well as the pathophysiology is discussed in this review. In conclusion, infections with C. trachomatis is an important public health problem, especially in third world and developing countries, and more socio-economic studies linking secondary prevention of chlamydial infections, infertility and adverse pregnancy outcome are needed to understand more of its aetiology. In addition, diagnosis and treatment should be improved. Data in men revealed that past infections but not present infections are more related to male infertility. There is still controversial results. In future studies, function of the seminal vesicles and evaluation of the antioxidant capacity should be taken into account when role of C. trachomatis infection on male fertility is assessed MH - Argentina MH - Chile MH - Colombia MH - Germany MH - Mexico|Nuevo Leon MH - Peru MH - Venezuela PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 14 U4 - Andrology U5 - J;Review AV - English IS - 0303-4569 UR - ISI:000188864100001 L2 - Chlamydia trachomatis;human spermatozoa;male genital infection;male infertility;reactive oxygen species;sperm function;HEAT-SHOCK-PROTEIN; MALE GENITAL-TRACT; POLYMERASE-CHAIN-REACTION; MALE REPRODUCTIVE-TRACT; IN-VITRO ACTIVITY; DEOXYRIBONUCLEIC-ACID FRAGMENTATION; PELVIC-INFLAMMATORY-DISEASE; ASYMPTOMATIC INFERTILE MEN; SPERM CHROMATIN STABILITY; OXYGEN SPECIES PRODUCTION SO - Andrologia 2004 ;36(1):1-23 10956 UI - 5982 AU - Gonzalez-Aguilar G AU - Wang CY AU - Buta GJ AD - CIAD AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoUSDA ARS, Prod Qual & Safety Lab, Beltsville, MD 20705, USAGonzalez-Aguilar, G, CIAD AC, Direcc Tecnol Alimentos Origen Vegetal, Carretera Victoria Km 0-6, Hermosillo 83000, Sonora, Mexico TI - UV-C irradiation reduces breakdown and chilling injury of peaches during cold storage AB - Pre-storage exposure of peaches (Prunus persica cv Jefferson) with UV-C irradiation for 3, 5 or 10 min significantly reduced chilling injury after 14 and 21 days of storage at 5degreesC plus 7 days of shelf-life at 20degreesC. Similar reduction in fungal decay was also found by these treatments. Skin browning and UV damage were found to be moderate to severe in peaches after the 15 or 20 min of UV-C treatments. The 20 min of exposure accelerated deterioration. Fruit treated with UV-C for 3, 5 or 10 min remained firmer and softened more slowly than the control and those treated with longer durations of exposure. No differences were found in weight loss or respiration rates among the treatments. However, ethylene production was stimulated by all of the UV-C treatments compared with the control. Putrescine levels increased initially after 3 or 5 min of exposure to UV-C. A tendency toward higher accumulation of spermidine and spermine was found in peaches after UV exposure. These higher levels of polyamines apparently are a response to the UV-C irradiation and might be beneficial in increasing the resistance of fruit tissue to deterioration and chilling injury. (C) 2004 Society of Chemical Industry MH - Mexico|Sonora MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000220239000006 L2 - UV-C irradiation;decay;chilling injury;polyamines;INDUCED RESISTANCE; ULTRAVIOLET-IRRADIATION; PHOTOCHEMICAL TREATMENT; POSTHARVEST DISEASES; BOTRYTIS-CINEREA; TABLE GRAPES; DECAY; ACCUMULATION; APPLES; FRUITS SO - Journal of the Science of Food and Agriculture 2004 ;84(5):415-422 10957 UI - 5666 AU - Gonzalez-Aguilar GA AU - Ruiz-Cruz S AU - Cruz-Valenzuela R AU - Rodriguez-Felix A AU - Wang CY AD - CIAD AC, Direcc Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoARS, Produce Qual & Safety Lab, USDA, Beltsville, MD 20705, USAGonzalez-Aguilar, GA, CIAD AC, Direcc Tecnol Alimentos Origen Vegetal, Carretera Victoria Km 0-6,Carr A La Victoria, Hermosillo 83000, Sonora, Mexico TI - Physiological and quality changes of fresh-cut pineapple treated with antibrowning agents AB - The Physiological responses of pineapple slices to antibrowning agents have been studied. Slices were immersed for 2 min in solutions of isoascorbic acid (IAA) 0.1 mol/l, ascorbic acid (AA) 0.05 mol/I or acetyl cysteine (AC) 0.05 mol/l, packaged in polystyrene trays, prior to storage for up to 14 days at 10degreesC. The use of these antibrowning agents reduced browning and decay of pineapple slices significantly. These treatments also reduced changes in L* and b* values as well as firmness loss. Changes of in-package atmosphere did not adversely affect quality of slices. Slices treated with 0.1 mol/l IAA had the best visual appearance and were more acceptable compared with the control slices. The best results were obtained using IAA, followed by AC and AA. Organoleptic attributes were not affected and no off-flavors were detected in the treated slices. We conclude that pineapple slices can be maintained in good condition for up 14 days at 10degreesC following treatment with antibrowning agents. (C) 2003 Swiss Society of Food Science and Technology. Published by Elsevier Ltd. All rights reserved MH - Mexico|Sonora MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0023-6438 UR - ISI:000220924700012 L2 - pineapple;slices;antibrowning;decay;ascorbic acid;isoascorbic acid;acetyl cysteine;BROWNING INHIBITION; PROCESSED FRUITS; NATURAL-PRODUCTS; SHELF-LIFE; SLICES; DERIVATIVES; VEGETABLES; CANTALOUPE; APPLE; ATMOSPHERES SO - Lebensmittel-Wissenschaft Und-Technologie-Food Science and Technology 2004 ;37(3):369-376 10958 UI - 4688 AU - Gonzalez-Angeles A AU - Mendoza-Suarez G AU - Gruskova A AU - Dosoudil R AU - Ortega-Zempoalteca R AD - Cinvestav Saltillo, Coahuila, MexicoSlovak Tech Univ, FEEIT, Dept Electrotechnol, Bratislava 81219, SlovakiaNatl Autonomous Univ Mexico, Dept Ceramicos & Met, Inst Invest & Mat, Mexico City 04510, DF, MexicoGonzalez-Angeles, A, Cinvestav Saltillo, Carr Saltillo Mty Km 13,POB 663, Coahuila, Mexico TI - Magnetic studies of Sn2+-Sn4+-substituted barium hexaferrites synthesized by mechanical alloying AB - The effect of Sn2+-Sn4+ mixture on magnetic properties of BaM has been studied by Mossbauer spectroscopy and vibrating sample magnetometry. The results show that the magnetization reached a maximum for x = 0.2 and then diminished. Mossbauer spectra showed that Sn2+-Sn4+ ions preferentially occupy 2b and 4f(2) sites, followed by 4f(1) and 2a sites; whilst the 12k was the least affected by the substitution. The preference for the 42 and 41 sites is responsible for the increase in the magnetization at low substitutions, due to their spin down configuration. At x greater than or equal to 0.3 values, a steep drop of both M-s and M-r was recorded, which might be due to the appearance of small amounts of tin oxide (SnO2) as a secondary phase. A large variation of the intrinsic coercivity, H-ci, (4.8 to 0.909 kOe) was obtained as a function of the substitution. The rapid decrease of H-ci has its origin in the preference of Sn2+-Sn-4 ions for the 2b and 42 sites. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000223164200044 L2 - substitution effects;magnetic properties;Mossbauer spectra;hexagonal ferrites;FERRITE; ZN SO - Materials Letters 2004 ;58(22-23):2906-2910 10959 UI - 6277 AU - Gonzalez-Angeles A AU - Mendoza-Suarez G AU - Gruskova A AU - Toth I AU - Jancarik V AU - Papanova M AU - Escalante-Garcia JI AD - IPN, CINVESTAV, Unidad Saltillo Ceram, Saltillo 25000, Coahuila, MexicoSlovak Tech Univ, FEEIT, Dept Electrotechnol, Bratislava 81219, SlovakiaSlovak Tech Univ, FEEIT, Dept Nucl Phys & Technol, Bratislava 81219, SlovakiaSlovak Tech Univ, FEEIT, Dept Electromagnet Theory, Bratislava 81219, SlovakiaMendoza-Suarez, G, IPN, CINVESTAV, Unidad Saltillo Ceram, Carr Saltillo Mty Km 13,POB 663, Ramos Arizpe 25900, Coahuila, Mexico TI - Magnetic studies of NiSn-substituted barium hexaferrites processed by attrition milling AB - BaFe12-2x(NiSn)(x)O-19 compounds were synthesized via attrition milling and characterized. The substitution, x was changed from 0 to 0.3. The magnetic properties were evaluated by vibrating sample magnetometry and thermomagnetic analysis. Mossbauer spectroscopy and X-ray diffraction techniques were used to investigate the magnetocrystalline structure. Our experimental results suggest that Ni-Sn cationic mixtures produce similar effects on the magnetic properties, to those observed for Ir-Co and Ir-Zn substitutions. The Ni2+-Sn4+ substitution reduced the uniaxial magnetic anisotropy field, H-a rather fast, becoming planar at low rates. Mossbauer studies revealed that Sn4+ ions replace Fe3+ ions on 2b and 4f(1) sites, while Ni2+ ions preferred 4f(2) and 2a sites. A large variation of the intrinsic coercivity, H-ci, (381.9-93.9kA/m) was obtained as a function of the substitution. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Coahuila MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000188887400009 L2 - hexagonal ferrites;substitution effects;magnetic properties;Mossbauer spectra;FERRITE PARTICLES; ZN; COERCIVITY SO - Journal of Magnetism and Magnetic Materials 2004 ;270(1-2):77-83 10960 UI - 3900 AU - Gonzalez-Casanova P AU - Gout C AD - UNSA Rouen Lab Math, F-76130 Mont St Aignan, FranceUniv Nacl Autonoma Mexico, UICA DGSCA, Mexico City 04510, DF, MexicoGout, C, UNSA Rouen Lab Math, Pl E Blondel,BP 08, F-76130 Mont St Aignan, France TI - Approximation near the boundary of a radial quasi-interpolant in polygonal domains AB - Given an open bounded subset Omega of R-2 with polygonal boundary and a set of n data values {u(x(i), y(i))}(i=1)(n) whose centers can be used to perform a regular triangulation of Omega, we introduce local and global quasi-interpolants that approximate the unknown function u at any point t of Omega. In particular, the approximation problem near the boundary of the studied domain is solved. The method is modelled using numerical examples MH - France MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0020-7160 UR - ISI:000225220000001 L2 - quasi-interpolation;radial basis functions;surface approximation;computer-aided design SO - International Journal of Computer Mathematics 2004 ;81(12):1445-1454 10961 UI - 5152 AU - Gonzalez-Chavez MC AU - Carrillo-Gonzalez R AU - Wright SF AU - Nichols KA AD - Nat Resources Inst, Colegio Postgrad, Mexico City 56230, DF, MexicoUSDA ARS, Sustainable Agr Syst Lab, Beltsville, MD 20705, USAUSDA ARS, No Great Plains Res Lab, Mandan, ND 58554, USAGonzalez-Chavez, MC, Nat Resources Inst, Colegio Postgrad, Carr Mexico Texcoco Km 36-5,Montecillo Edo, Mexico City 56230, DF, Mexico TI - The role of glomalin, a protein produced by arbuscular mycorrhizal fungi, in sequestering potentially toxic elements AB - Naturally occurring soil organic compounds stabilize potentially toxic elements (PTEs) such as Cu, Cd, Pb, and Mn. The hypothesis of this work was that an insoluble glycoprotein, glomalin, produced in copious amounts on hyphac of arbuscular mycorrhizal fungi (AMF) sequesters PTEs. Glomalin can be extracted from laboratory cultures of AMF and from soils. Three different experiments were conducted. Experiment 1 showed that glomalin extracted from two polluted soils contained 1.6-4.3 mg Cu, 0.02-0.08 mg Cd, and 0.62-1.12 mg Pb/g glomalin. Experiment 2 showed that glomalin from hyphae of an isolate of Gigaspora rosea sequestered Lip to 28 mg Cu/g in vitro. Experiment 3 tested in vivo differences in Cu sequestration by Cu-tolerant and non-tolerant isolates of Glomus mosseae colonizing sorghum. Plants were fed with nutrient solution containing 0.5, 10 or 20 muM of Cu. Although no differences between isolates were detected, mean values for the 20 muM Cu level were 1.6, 0.4, and 0.3 mg Cu/g for glomalin extracted from hyphae, from sand after removal of hyphac and from hyphae attached to roots, respectively. Glomalin should be considered for biostabilization leading to remediation of polluted soils. Published by Elsevier Ltd MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 18 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000222233700003 L2 - potentially toxic elements;metal-stabilization;bioremediation;fungal cell wall;soil organic matter;MUCOR-ROUXII; SOIL; COPPER; METALS; TOLERANCE; SORPTION; HYPHAE; BIOSORPTION; STABILITY; MYCELIUM SO - Environmental Pollution 2004 ;130(3):317-323 10962 UI - 3214 AU - Gonzalez-Chi PI AU - Young RJ AD - Ctr Invest Cientif Yucatan AC, Unidad Mat, Merida, Yucatan, MexicoUniv Manchester, Inst Sci & Technol, Ctr Mat Sci, Manchester M1 7HS, Lancs, EnglandGonzalez-Chi, PI, Ctr Invest Cientif Yucatan AC, Unidad Mat, Calle 43 130,Col Chuburna Hidalgo,CP 97200, Merida, Yucatan, Mexico TI - Deformation micromechanics of a thermoplastic-thermoset interphase of epoxy composites reinforced with poliethylene fiber AB - The polyethylene fibre is one of the strongest man-made materials; its strength is based on its high crystalinity order. Nevertheless, due to the Polyethylene chemical nature, it shows a low reactivity, which limits its use for composite materials, especially with thermoset matrices like the Epoxy resin. The present work uses Raman Spectroscopy to monitor the loading and failure of a thermoplastic-thermoset interface. Pull-out specimens were prepared with Spectra 1000 Polyethylene fibre embedded in a epoxy resin block; the fibre extraction was performed in a stepwise fashion and with the aid of a micro-Raman, spectra were taken along the interface through out the whole process. The technique allowed to measure the interface strength and to monitor the propagation of the debonding front up to total failure. Some results correspond to specimens were the interface was improved by changing the surface chemistry of the thermoplastic fibre to make it more compatible to the thermoset matrix. (C) 2004 Kluwer Academic Publishers MH - United Kingdom MH - Mexico|Yucatan PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000226811800022 L2 - PULL-OUT TEST; MODULUS POLYETHYLENE FIBERS; RAMAN-SPECTROSCOPY; POLYMER COMPOSITES; ARAMID FIBERS; MOLECULAR DEFORMATION; SURFACE MODIFICATION; STRESS-DISTRIBUTION; SHEAR-STRENGTH; INTERFACE SO - Journal of Materials Science 2004 ;39(23):7049-7059 10963 UI - 3232 AU - Gonzalez-del Angel A AU - Spector E AU - Alcantara M AU - del Castillo V AD - Inst Nacl Pediat, Dept Invest Genet Humana, Mexico City, DF, MexicoUniv Colorado, Hlth Sci Ctr, Dept Pediat, Boulder, CO 80309, USA TI - Achondroplasia-hypocondroplasia complex in a Mexican patient MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Meeting Abstract AV - English IS - 1098-3600 UR - ISI:000222745200106 SO - Genetics in Medicine 2004 ;6(4):291-291 10964 UI - 3551 AU - Gonzalez-Espinosa M AU - Rey-Benayas JM AU - Ramirez-Marcial N AU - Huston MA AU - Golicher D AD - Colegio Frontera Sur ECOSUR, Dept Ecol & Sistemat Terr, Div Conservac Biodiversidad, San Cristobal Las Casas 29200, Chiapas, MexicoUniv Alcala de Henares, Dept Interuniv Ecol, E-28871 Alcala De Henares, SpainTexas State Univ, Dept Biol, San Marcos, TX 78666, USAGonzalez-Espinosa, M, Colegio Frontera Sur ECOSUR, Dept Ecol & Sistemat Terr, Div Conservac Biodiversidad, San Cristobal Las Casas 29200, Chiapas, Mexico TI - Tree diversity in the northern Neotropics: regional patterns in highly diverse Chiapas, Mexico AB - Physical factors that may account for regional patterns of plant species diversity remain controversial. We aim to determine the relationship of tree species diversity to environmental factors identifiable at regional scale in the northern Neotropics. We use a high-resolution data set based on herbarium collections of all native tree species known to occur in the highly diverse and physiographically heterogeneous Mexican state of Chiapas. We analyzed 114 grid cells (5 min latitude x 5 min longitude each) with 40 or more vouchers. We obtained from maps (scale 1:250000) data on temperature, rainfall, elevation, and soils, and calculated for each grid cell mean actual evapotranspiration (AET), its ratio during the rainy and Airy seasons (RET), average fertility/quality of soils (SFQ), and elevation (coarse-scale topography) variance (SDE). These variables were largely independent of each other, and were entered in multiple regression models to predict species diversity assessed with Simpson's index of concentration. A model that accounted for 41.4% of the total variance in tree diversity showed positive effects of AET and seasonality (RET), whereas SFQ had a negative effect. A curvilinear model described well the relationship between tree diversity and AET (R-2=0.45), and an intermediate maximum was detected. The data pattern Suggested an asymptotic relationship as well, which was confirmed with a two-part regression. Regression quantiles provided better estimates of the effect of SFQ with the upper envelope of the data (0.85-0.90 quantiles). Minimum diversity at intermediate rainfall values hints at a bimodal model of tree diversity along a rainfall gradient, in opposition to the frequent contention of a positive linear relationship. We suggest that broad-scale climatic gradients interact with intraregional landscape-level influences, thus leading to the observed nonlinear responses of tree diversity to environmental predictors MH - Mexico|Chiapas MH - Spain MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 7 U4 - Ecology U5 - J;Review AV - English IS - 0906-7590 UR - ISI:000225974900006 L2 - PLANT-SPECIES RICHNESS; WATER-ENERGY DYNAMICS; PRIMARY PRODUCTIVITY; COMMUNITY DIVERSITY; CLIMATIC GRADIENTS; GLOBAL PATTERNS; RAIN-FOREST; SCALE; BIODIVERSITY; REGRESSION SO - Ecography 2004 ;27(6):741-756 10965 UI - 4232 AU - Gonzalez-Farias G AU - Dominguez-Molina A AU - Gupta AK AD - Ctr Invest Matemat AC, Guanajuato 36240, MexicoUniv Guanajuato, Guanajuato 36240, MexicoBowling Green State Univ, Bowling Green, OH 43403, USAGonzalez-Farias, G, Ctr Invest Matemat AC, Callejon Jalisco S-N, Guanajuato 36240, Mexico TI - Additive properties of skew normal random vectors AB - We show that for a random vector with a multivariate closed skew normal (CSN) distribution all column (row) full rank linear transformations are in the family of CSN distributions. We also show the closure of sums of independent CSN random vectors and provide a characterization for the CSN. We consider alternative representations of multivariate skew normal distributions as particular cases of the CSN and use some of them to illustrate the above properties. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0378-3758 UR - ISI:000224224300008 L2 - linear transformation;joint distribution of skew normal random variables;distribution of the sums;characterization;singular distribution;INFERENCE SO - Journal of Statistical Planning and Inference 2004 ;126(2):521-534 10966 UI - 3310 AU - Gonzalez-Flores O AU - Komisarak BR AU - Beyer C AD - Univ Autonoma Tlaxcala, CIRA, Tlaxcala, MexicoRutgers State Univ, Dept Psychol, Piscataway, NJ 08855, USACINVESTAV, Reprod Biol Lab, Mexico City, DF, Mexico TI - Hormone dependent and independent facilitation of lordosis by vaginal-cervical stimulation (VCS) may use different cellular processes MH - Mexico|Distrito Federal MH - Mexico|Tlaxcala MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Behavioral Sciences;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0018-506X UR - ISI:000222517100035 SO - Hormones and Behavior 2004 ;46(1):90-90 10967 UI - 3906 AU - Gonzalez-Flores O AU - Shu J AU - Camacho-Arroyo I AU - Etgen AM AD - Yeshiva Univ Albert Einstein Coll Med, Dept Neurosci, Bronx, NY 10461, USAUniv Autonoma Tlaxcala, Ctr Invest & Estudios Avanzados, Ctr Invest Reprod Anim, Tlaxcala 90140, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Biol, Mexico City 04510, DF, MexicoEtgen, AM, Yeshiva Univ Albert Einstein Coll Med, Dept Neurosci, 1300 Morris Pk Ave, Bronx, NY 10461 USA TI - Regulation of lordosis by cyclic 3 ',5 '-guanosine monophosphate, progesterone, and its 5 alpha-reduced metabolites involves mitogen-activated protein kinase AB - Progesterone (P) and its ring A-reduced metabolites regulate sexual behavior in ovariectomized, estrogen-primed female rats when they are administered intracerebrally and systemically. The present study tested the hypothesis that the MAPK pathway participates in P facilitation and sequential inhibition of sexual behavior. The role of MAPK in lordosis facilitation by two ring A-reduced metabolites of P, 5alpha-dihydroprogesterone (5alpha-DHP) and 5alpha,3alpha-pregnanolone (5alpha,3alpha-Pgl), was also assessed. In Experiment 1, the MAPK inhibitor PD98059 was infused intracerebroventricularly before progestin administration. Lordosis behavior induced by P, 5alpha-DHP, and 5alpha,3alpha-Pgl was abolished 2 h after progestin administration by PD98059. P and 5alpha,3alpha-Pgl facilitation of proceptive behaviors was also decreased by the MAPK inhibitor. Experiment 2 examined the effects of MAPK inhibition on P sequential inhibition. Estrogen-primed females received intracerebroventricular infusions of PD98059 or vehicle 30 min before systemic administration of P and were tested for lordosis 4 h later. Animals received a second injection of P 24 h later and were retested for lordosis. The MAPK inhibitor blocked both lordosis facilitation and sequential inhibition produced by systemic administration of P. Because cGMP can also facilitate lordosis behavior, and cGMP-dependent protein kinase can activate MAPK, experiment 3 determined whether interference with MAPK would affect cGMP enhancement of lordosis. The icv infusion of PD98059 significantly inhibited lordosis behavior induced by 8-bromo-cGMP, a cell-permeable cGMP analog, at both 2 and 4 h. These data support the hypothesis that the MAPK pathway is involved in lordosis regulation by P and some of its ring A-reduced metabolites as well as by the second messenger, cGMP MH - Mexico|Distrito Federal MH - Mexico|Tlaxcala MH - USA PB - CHEVY CHASE: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 11 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0013-7227 UR - ISI:000225109400020 L2 - FACILITATED SEXUAL RECEPTIVITY; SIGNAL-TRANSDUCTION PATHWAYS; ESTROGEN PRIMED RATS; A-REDUCED-PROGESTINS; FEMALE RATS; PHOSPHORYLATION SITES; RECEPTOR ACTIVATION; MEDIAL HYPOTHALAMUS; OVARIAN HORMONES; 26S PROTEASOME SO - Endocrinology 2004 ;145(12):5560-5567 10968 UI - 5638 AU - Gonzalez-Flores O AU - Guerra-Araiza C AU - Cerbon M AU - Camacho-Arroyo I AU - Etgen AM AD - Yeshiva Univ Albert Einstein Coll Med, Dept Neurosci, Bronx, NY 10461, USAUniv Autonoma Tlaxcala, Ctr Invest & Estudios Avanzados, Tlaxcala 90140, MexicoNatl Autonomous Univ Mexico, Fac Quim, Dept Biol, Mexico City 04510, DF, MexicoEtgen, AM, Yeshiva Univ Albert Einstein Coll Med, Dept Neurosci, 1300 Morris Pk Ave,F113, Bronx, NY 10461 USA TI - The 26S proteasome participates in the sequential inhibition of estrous behavior induced by progesterone in rats AB - Estrous behavior induced by progesterone ( P) treatment of estradiol-primed rats is followed by a period in which females do not respond behaviorally to a second administration of P [sequential inhibition (SI)]. SI is thought to involve P-dependent down-regulation of hypothalamic P receptor ( PR) content. This study tested the hypothesis that the 26S proteasome participates in the regulation of SI and brain PR content in female rats. Ovariectomized, estrogen-primed ( estradiol benzoate, 2 mug sc) adult rats were injected with P (1 mg sc) alone or P with the proteasome inhibitors Z-Ile-Glu (OBu1)-Ala-Leu-H (PSI, 300 mug/100 g sc) or Nalpha-tosyl-lysyl chloromethyl ketone (TLCK, 200 mug ip) administered 48 h after estradiol priming. Sexual behavior was assessed in all animals 4 h later. These two agents inhibit 26S proteasome-mediated protein degradation by different mechanisms. To explore SI, the animals received a second P injection 24 h after the first, and a second sexual behavior test was performed 4 h later. After this test, brains were excised, and proteins were extracted from the preoptic area and the hypothalamus and processed for semiquantitative immunoblotting. In the first sexual behavior test ( facilitation test), all animals treated with estradiol + P exhibited intense lordosis behavior. In the second sexual behavior test ( inhibition test), both lordosis and proceptivity were significantly reduced in response to the second administration of P ( SI). The magnitude of SI was significantly attenuated by the administration of either PSI or TLCK concurrently with the first P injection. The first P injection reduced PR content in the hypothalamus but not in the preoptic area. In contrast, PSI and TLCK significantly increased PR content in both structures. Our results suggest that PR degradation by the 26S proteasome participates in the expression of P-induced SI in female rats MH - Mexico|Distrito Federal MH - Mexico|Tlaxcala MH - USA PB - BETHESDA: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 7 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0013-7227 UR - ISI:000221101900025 L2 - GUINEA-PIG BRAIN; FEMALE SEXUAL-BEHAVIOR; CENTRAL-NERVOUS-SYSTEM; RECEPTOR ISOFORMS; REPRODUCTIVE-BEHAVIOR; LORDOSIS; RECEPTIVITY; FACILITATION; EXPRESSION; BINDING SO - Endocrinology 2004 ;145(5):2328-2336 10969 UI - 5997 AU - Gonzalez-Flores O AU - Etgen AM AD - Yeshiva Univ Albert Einstein Coll Med, Dept Neurosci F113, Bronx, NY 10461, USAUAT, CINVESTAV, Ctr Invest Reprod Anim Campus Agrobiol, Tlaxcala, MexicoEtgen, AM, Yeshiva Univ Albert Einstein Coll Med, Dept Neurosci F113, 1300 Morris Pk Ave, Bronx, NY 10461 USA TI - The nitric oxide pathway participates in estrous behavior induced by progesterone and some of its ring A-reduced metabolites AB - Intracerebral and intravenous administration of progesterone (P) and its ring A-reduced metabolites induces intense sexual behavior (lordosis and proceptivity) in estrogen-primed rats. The present study tested the hypothesis that the nitric oxide-cGMP-protein kinase G pathway is involved in the facilitation of sexual behavior induced by the intracerebroventricular (icv) administration of P (130 ng) and its ring A-reduced metabolites 5alpha-dihydroprogesterone (5alpha-DHP; 13 ng) and 5alpha,3alpha-pregnanolone (5alpha,3alpha-PgI; 13 ng). In Experiment 1, we tested the relevance of the nitric oxide/cGMP pathway by infusing a nitric oxide synthase inhibitor or a nitric oxide-dependent, soluble guanylyl cyclase inhibitor icv before progestin administration. The lordosis induced by P, 5alpha-DHP and 5alpha,3alpha-PgI was significantly reduced at 2 h after progestin infusion by the previous injection of either a nitric oxide synthase inhibitor or by a soluble guanylyl cyclase inhibitor. Lordosis behavior returned to control values by 4 h. In Experiment 2, icv infusion of the protein kinase G inhibitor KT5823 significantly inhibited the lordosis behavior induced by all three progestins at 2 h. These data support the hypothesis that the nitric oxide/cGMP/protein kinase G pathway is involved in the lordosis induced by P and some of its ring A-reduced metabolites. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Tlaxcala MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 16 U4 - Behavioral Sciences;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0018-506X UR - ISI:000220243700006 L2 - progesterone;L-NAME;ODQ;KT5823;lordosis;cGMP;ring A reduced progestins;protein kinase G;guanylyl cyclase;nitric oxide;FACILITATED SEXUAL RECEPTIVITY; HORMONE-RELEASING HORMONE; LORDOSIS BEHAVIOR; FEMALE RATS; PHOSPHORYLATION SITES; CYCLIC-GMP; MEDIAL HYPOTHALAMUS; GABA RECEPTOR; PREOPTIC AREA; PRIMED RATS SO - Hormones and Behavior 2004 ;45(1):50-57 10970 UI - 4673 AU - Gonzalez-Halphen D AU - Funes S AU - Perez-Martinez X AU - Reyes-Prieto A AU - Claros MG AU - Davidson E AU - King MP AD - Thomas Jefferson Univ, Dept Biochem & Mol Pharmacol, Philadelphia, PA 19107, USANatl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoUniv Munich, Inst Physiol Chem, D-81377 Munich, GermanyCornell Univ, Dept Mol Biol & Genet, Ithaca, NY 14853, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City, DF, MexicoUniv Malaga, Fac Ciencias, Dept Biol Mol & Bioquim, E-29071 Malaga, SpainKing, MP, Thomas Jefferson Univ, Dept Biochem & Mol Pharmacol, 233 S 10th St,BLSB 308, Philadelphia, PA 19107 USA TI - Genetic correction of mitochondrial diseases - Using the natural migration of mitochondrial genes to the nucleus in chlorophyte algae as a model system AB - Mitochondrial diseases display great diversity in clinical symptoms and biochemical characteristics. Although mtDNA mutations have been identified in many patients, there are currently no effective treatments. A number of human diseases result from mutations in mtDNA-encoded proteins, a group of proteins that are hydrophobic and have multiple membrane-spanning regions. One method that has great potential for overcoming the pathogenic consequences of these mutations is to place a wild-type copy of the affected gene in the nucleus, and target the expressed protein to the mitochondrion to function in place of the defective protein. Several respiratory chain subunit genes, which are typically mtDNA encoded, are nucleus encoded in the chlorophyte algae Chlamydomonas reinhardtii and Polytomella sp. Analysis of these genes has revealed adaptations that facilitated their expression from the nucleus. The nucleus-encoded proteins exhibited diminished physical constraints for import as compared to their mtDNA-encoded homologues. The hydrophobicity of the nucleus-encoded proteins is diminished in those regions that are not involved in subunit-subunit interactions or that contain amino acids critical for enzymatic reactions of the proteins. In addition, these proteins have unusually large mitochondrial targeting sequences. Information derived from these studies should be applicable toward the development of genetic therapies for human diseases resulting from mutations in mtDNA-encoded polypeptides MH - Germany MH - Mexico|Distrito Federal MH - USA MH - Spain PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - S;Article AV - English IS - 0077-8923 UR - ISI:000223002700039 L2 - mitochondrial diseases;mitochondrial genomes;gene therapy;chlorophyte algae;allotopic expression;gene migration;CYTOCHROME-C-OXIDASE; HEREDITARY OPTIC NEUROPATHY; CHLAMYDOMONAS-REINHARDTII; DNA; PROTEINS; SUBUNIT; MUTATIONS; GENOME; EXPRESSION; EVOLUTION SO - Strategies for Engineered Negligible Senescence: Why Genuine Control of Aging May be Foreseeable 2004 ;1019():232-239 10971 UI - 5869 AU - Gonzalez-Halphen D AU - Maslov DA AD - Univ Calif Riverside, Dept Biol, Riverside, CA 92521, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoMaslov, DA, Univ Calif Riverside, Dept Biol, 3401 Watkins Dr, Riverside, CA 92521 USA TI - NADH-ubiquinone oxidoreductase activity in the kinetoplasts of the plant trypanosornatid Phytomonas serpens AB - NADH-ubiquinone oxidoreductase activity is present in mitochondrial lysates of Phytomonas set-pens. Rotenone at 2-10 muM inhibited the activity 50-75%, indicating that it belongs to respiratory complex I. The activity was also inhibited 50-60% in the presence of 10-30 nM atovaquone suggesting that inhibition of complex I represents a likely mechanism of the known antileishmanial activity of this drug. The complex was partially purified by chromatography on DEAE-Sepharose CL-6B and gel-filtration on Sepharose CL-2B. The NADH:ubiquinone oxidoreductase activity in this preparation was completely inactivated by 20 nM atovaquone. The partially purified complex was present in a low amount and its subunits could not be discerned by staining with Coomassie. However, one of its components, a homologue of the 39 kDa subunit of the bovine complex I, was identified immunochemically in the original lysate and in the partially purified material MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000220490900011 L2 - CYTOCHROME-C-OXIDASE; BLOOD-STREAM FORMS; BRUCEI-BRUCEI; ATOVAQUONE-RESISTANCE; SUPEROXIDE-DISMUTASE; ALTERNATIVE OXIDASE; EUPHORBIA-CHARACIAS; FUMARATE REDUCTASE; LEISHMANIA-CHAGASI; ENERGY-METABOLISM SO - Parasitology Research 2004 ;92(4):341-346 10972 UI - 3697 AU - Gonzalez-Malerva L AU - Cruz-Rivera M AU - Reynoso-Ducoing O AU - Retamal C AU - Flisser A AU - Ambrosio JR AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoUniv Estadual Norte Fluminense, Ctr Biociencia & Biotecnol, BR-28015400 Rio De Janeiro, BrazilAmbrosio, JR, Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Circuito Interior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Muscular myosin isoforms of Taenia solium (Cestoda) AB - Type II myosin, the primary component of the thick filament of muscle fibers, is organized as a dimeric high molecular weight protein, and is composed of a pair of heavy chains (MHC and two pairs of light chains. Myosin II transforms ATP energy into mechanical force. All type II myosins are conserved proteins but they have two variable regions that are located in different places of the molecule. Myosin molecules are encoded by a multigene family and many isoforms are generated. The expression of myosins depends on the developmental stage and on the type and degree of contractile activity and tissue, therefore several myosin isoforms are found in the same organism. Here we describe the use of different techniques that allowed demonstrating the presence of isoforms of the heavy chain type II myosin of Taenia solilan cysticerci (larvae) and tapeworms (adults), a cestode parasite of importance in public health in many developing countries. Myosin was purified and used in comparative proteolytic fragmentation, ATPase activity, detection of antigenic differences and electrophoretic separation. The results obtained showed biochemical and immunochemical differences among cysticerci and tapeworms, and demonstrate the presence of myosin isoforms in T. solium that are probably associated to physiological requirements of each developmental stage. (C) 2004 International Federation for Cell Biology. Published by Elsevier Ltd. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Cell Biology U5 - J;Article AV - English IS - 1065-6995 UR - ISI:000225755200006 L2 - isoforms;ATPase;myosin 11;myosin heavy chain;muscular proteins;Taenia solium;SMOOTH-MUSCLE MYOSIN; HEAVY-CHAIN ISOFORMS; SODIUM DODECYL-SULFATE; ELECTROPHORETIC SEPARATION; MONOCLONAL-ANTIBODIES; POLYACRYLAMIDE-GELS; SUSCEPTIBLE SITES; PARAMYOSIN; PROTEINS; CYSTICERCI SO - Cell Biology International 2004 ;28(12):885-894 10973 UI - 3211 AU - Gonzalez-Mariscal G AU - Chirino R AU - Flores-Alonso JC AU - Rosenblatt JS AU - Beyer C AD - Univ Autonoma Tlaxcala, Ctr Invest & Reproducc Anim, CINVESTAV, Tlaxcala 90120, MexicoRutgers State Univ, Dept Psychol, Newark, NJ 07102, USAGonzalez-Mariscal, G, Univ Autonoma Tlaxcala, Ctr Invest & Reproducc Anim, CINVESTAV, Km 10-5 Autopista San Martin Texmelucan,Campus UA, Tlaxcala 90120, Mexico TI - Intracerebroventricular injections of prolactin counteract the antagonistic effect of bromocriptine on rabbit maternal behaviour AB - To investigate the participation of prolactin in nest-building and maternal behaviour in rabbits, we administered (from pregnancy day 26 to parturition) rabbit prolactin (rbPRL; or vehicle) intracerebroventricularly (i.c.v.) to primiparous animals injected with bromocriptine subcutaneously (s.c.). Control females (given vehicle s.c. and i.c.v.) built a maternal nest (of straw and body hair) in 77% of cases. This proportion decreased to 19% in the bromocriptine-only group (P < 0.05) and increased to 93% in the group given bromocriptine plus rbPRL (P > 0.05). Maternal behaviour (i.e. the adoption of a crouching posture over the litter inside the nest box) was expressed by 77% of control rabbits, 19% of bromocriptine-only animals (P < 0.05) and 57% of females given bromocriptine plus rbPRL (P > 0.05). Values of nonmaternal activities (i.e. scent-marking, ambulation in an open field) were similar among the three studied groups. These results suggest that prolactin, acting in late pregnancy, plays a major role in the stimulation of nest-building and maternal behaviour in rabbits MH - Mexico|Tlaxcala MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Endocrinology & Metabolism;Neurosciences U5 - J;Article AV - English IS - 0953-8194 UR - ISI:000226750500001 L2 - prolactin;maternal behaviour;nest-building;rabbit;hair-pulling;RECEPTOR GENE-EXPRESSION; NULLIPAROUS FEMALE RATS; MAMMARY-GLAND; PLACENTAL-LACTOGEN; PARENTAL BEHAVIOR; RING DOVES; PROGESTERONE; LACTATION; PREGNANCY; HORMONE SO - Journal of Neuroendocrinology 2004 ;16(12):949-955 10974 UI - 5475 AU - Gonzalez-Mariscal G AU - Chirino R AU - Beyer C AU - Rosenblatt JS AD - UAT, CINVESTAV, Ctr Invest Reprod Anim, Tlaxcala 90000, MexicoRutgers State Univ, Dept Psychol, Newark, NJ 07102, USAGonzalez-Mariscal, G, UAT, CINVESTAV, Ctr Invest Reprod Anim, Apdo Postal 62, Tlaxcala 90000, Mexico TI - Removal of the accessory olfactory bulbs promotes maternal behavior in virgin rabbits AB - Virgin rabbits exposed to foster pups for 14 days did not show maternal responsiveness. However, surgical removal of the accessory olfactory bulbs (AOB) activated maternal responsiveness (crouching over the litter inside the nest box for about 3 min, which is the normal duration of a nursing bout) in 37% of virgin rabbits (P < 0.007). This behavior appeared abruptly and was first observed between days 3 and 13 of pup exposure. This variation in the latency to respond maternally was not related with the number of sniffings or entrances into the nest box displayed by a female on the days that preceded crouching over the litter. Maternal responsiveness was not observed in any AOB-lesioned animals that were also ovariectomized (P < 0.02 versus AOB-lesioned with ovaries). These results indicate a tonic inhibitory action of the AOB over the expression of maternal behavior in virgin rabbits and a stimulation of maternal responsiveness by ovarian hormones following AOB lesions. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Tlaxcala MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000221562400009 L2 - maternal behavior;rabbit;accessory olfactory bulb;estrogen;neural control;tonic inhibition;olfaction;PERIPHERALLY INDUCED ANOSMIA; CHIN-MARKING BEHAVIOR; ZEALAND WHITE-RABBITS; FEMALE RABBITS; MILK SECRETION; MOUSE; VOMERONASAL; LESIONS; RAT; SYSTEM SO - Behavioural Brain Research 2004 ;152(1):89-95 10975 UI - 4302 AU - Gonzalez-Perez-Sandi S AU - Fujioka J AU - Malomed BA AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoTel Aviv Univ, Fac Engn, Dept Interdisciplinary Studies, IL-69978 Tel Aviv, IsraelFujioka, J, Univ Nacl Autonoma Mexico, Inst Fis, Circito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Embedded solitons in dynamical lattices AB - We demonstrate that a discrete nonlinear Schrodinger (NLS) equation, which includes the next-nearest-neighbor linear couplings and cubic and quintic nonlinearities of the Ablowitz-Ladik type, gives rise to exact discrete-solitons solutions, both bright and dark, if a special constraint is imposed on coefficients of the equation. The bright lattice soliton is of the regular or embedded type, depending on the coefficients. Thus, this model produces the first explicit example of lattice solitons of the embedded type. The continuum limit of this model is an extended NLS equation which was recently shown to have an exact embedded-soliton (ES) solution. The discrete model may give rise to two different coexisting bright-soliton solutions, as well as to bright and dark ones, at the same values of coefficients in the equation. Evolution of the solitons under perturbations is studied numerically. It is shown that the perturbed regular lattice soliton oscillates without radiation loss, while the embedded soliton slowly loses energy, emitting phonon radiation at wave numbers which are very accurately predicted by the ES-phonon-band resonance condition. (C) 2004 Elsevier B.V. All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000224052900006 L2 - lattice solitons;embedded solitons;dynamical lattices;NLS EQUATION; EXISTENCE; RESONANCE; WAVES SO - Physica D-Nonlinear Phenomena 2004 ;197(1-2):86-100 10976 UI - 6057 AU - Gonzalez-Prieto JM AU - Dominguez A AU - Rosas-Quijano R AU - Cervantes-Chavez JA AU - Ruiz-Herrera J AD - IPN, Ctr Invest & Estudios Avanzados, Dept Ingn Genet, Unidad Irapuato, Irapuato, Gto, MexicoUniv Salamanca, Dept Microbiol & Genet, Salamanca 37007, SpainRuiz-Herrera, J, IPN, Ctr Invest & Estudios Avanzados, Dept Ingn Genet, Unidad Irapuato, Apartado Postal 629, Irapuato, Gto, Mexico TI - Isolation and molecular analysis of Umhda2 a gene encoding a histone deacetylase from Ustilago maydis AB - By use of the polymerase chain reaction and synthetic oligonucleotides designed from conserved regions, we amplified a fragment of a gene from Ustilago maydis encoding a putative histone deacetylase. With this probe we isolated the full gene from a minigenomic library. The gene (designated as Umhda2 ) contains an open reading frame (ORF) of 1701 bp encoding a protein of 566 amino acids. Multiple comparison analysis with other histone deacetylases suggests that the Umhda2 gene product belongs to the Rpd3-related family of proteins. The highest degree of homology with histone deacetylases from other organisms corresponded to Hda1p of Schizosaccharomyces pombe and Rpd3p of Saccharomyces cerevisiae with 64.2 and 62.2% of sequence similarity, respectively. It displayed a substantially lower similarity with another histone deacetylase from U. maydis (Hda1p, 52.4%). Semi-quantitative RTPCR results indicate that the gene is transcriptionally up-regulated during the in vitro yeast-to-mycelium dimorphic transition MH - Mexico|Guanajuato MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 1042-5179 UR - ISI:000220049400007 L2 - histone deacetylase;chromatin structure;nucleosomes;Ustilago maydis;YEAST; ACETYLATION; RECRUITMENT; REPRESSION; MEMBERS; COMPLEX; HDA1; RNA; DNA SO - Dna Sequence 2004 ;15(1):44-50 10977 UI - 4179 AU - Gonzalez-Rodriguez A AU - Bain JF AU - Golden JL AU - Oyama K AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58190, Michoacan, MexicoUniv Lethbridge, Dept Biol Sci, Lethbridge, AB T1K 3M4, CanadaGonzalez-Rodriguez, A, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Antigua Carretera Patzcuaro No 8701,Col Ex Hacien, Morelia 58190, Michoacan, Mexico TI - Chloroplast DNA variation in the Quercus affinis-Q-laurina complex in Mexico: geographical structure and associations with nuclear and morphological variation AB - The geographical distribution of chloroplast DNA (cpDNA) variation in 39 populations of two hybridizing Mexican red oaks, Quercus affinis and Q. laurina, was investigated using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Six haplotypes were identified. Of these, two (H1 and H4), separated by four mutations, had high frequencies (58 and 23% of the individuals, respectively) and were present across the whole geographical range of both species, often co occurring in the same populations. The other four haplotypes were rare, geographically restricted, and are probably derived from the two frequent haplotypes. Latitudinal or other clinal patterns in diversity levels or haplotype composition of populations were not apparent. The pattern of haplotype distribution was characterized by some mosaicism, with contrasting populations often situated in proximity. Average within-population diversity (h(S) = 0.299) and population differentiation (G(ST) = 0.499) were, respectively, higher and lower than values reported in previous studies of oak species. There was evidence for phylogeographical structure, as indicated by N-ST (0.566) being significantly higher than G(ST). Haplotypic variation was largely species-independent, although some very weak associations were detected between haplotypes H1 and H4 and morphological and nuclear molecular variation correspondingly characterizing Q. affinis and Q. laurina. These oaks probably did not experience a marked restriction to one or a few particular subregions of their present range during the last glacial cycle. It is more likely that substantial populations persisted throughout several episodes of climatic change, but experienced recurrent latitudinal and altitudinal migrations which may have caused the widespread distribution of haplotypes H1 and H4 and frequent intermixing of populations MH - Canada MH - Mexico|Michoacan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000224524000018 L2 - chloroplast DNA;geographical structure;hybridization;Mexico;population history;Quercus;EUROPEAN WHITE OAKS; HYBRID ZONES; GENE FLOW; PHYLOGEOGRAPHY; L.; DIVERSITY; PLANTS; ILEX; TREE; DIFFERENTIATION SO - Molecular Ecology 2004 ;13(11):3467-3476 10978 UI - 5044 AU - Gonzalez-Ronquillo M AU - Balcells J AU - Belenguer A AU - Castrillo C AU - Mota M AD - Univ Zaragoza, Dept Prod Anim & Ciencia Alimentos, E-50013 Zaragoza, SpainUniv Autonoma Estado Mexico, Fac Med Vet & Zootecnia, Dept Anim Prod, Toluca 50000, MexicoBalcells, J, Univ Zaragoza, Dept Prod Anim & Ciencia Alimentos, C Miguel Servet 177, E-50013 Zaragoza, Spain TI - A comparison of purine derivatives excretion with conventional methods as indices of microbial yield in dairy cows AB - Three multiparous, ruminally and duodenally cannulated Holstein-Friesian milking cows (558 +/- 14 kg BW) with a mean milk yield of 19.9 +/- 1.4 kg/d in their 4th mo of lactation were fed a mixed diet of forage and concentrate at 100, 85, and 75% of ad libitum intake in a 3 x 3 Latin square design. Duodenal digesta flow was estimated using the dual-phase technique in which Cr-EDTA and Yb-acetate were used as liquid and solid markers, respectively. Microbial N (MN) was estimated using the duodenal flow of purine bases (PB); bacterial isolates from the rumen liquid and solid phases were used as references. Additionally, duodenal flow of PB and MN were estimated indirectly using the excretion of purine derivatives (PD) in urine and milk. Duodenal flow of PB and derived MN tended to decrease with feed restriction ( from 258 to 154 mmol/d and 123.5 to 74.4 g/d, respectively). Estimates of PB and MN based on urinary PD showed the same trend, and decreases in PB ( from 314 to 266 mmol/d, using LAB) were statistically significant. Using LAB, efficiencies of microbial protein synthesis in the ad libitum treatment were 12.9 and 17.0 g of MN/g of organic matter apparently digested in the rumen when estimated using duodenal PB and urinary excretion of PD, respectively. Urinary excretion of PD closely reflected changes in duodenal flow of PB as a result of feed restriction MH - Mexico|Estado De Mexico MH - Spain PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 9 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000222323800029 L2 - microbial synthesis;purine derivative;milk;dairy cow;URINARY-EXCRETION; METABOLITE CONCENTRATIONS; CHEMICAL-COMPOSITION; NITROGEN-PRODUCTION; RUMEN FERMENTATION; MILK-PRODUCTION; LACTATING COWS; GRASS SILAGES; SHEEP; PROTEIN SO - Journal of Dairy Science 2004 ;87(7):2211-2221 10979 UI - 5683 AU - Gonzalez-Sandoval MP AU - Beesley AM AU - Miki-Yoshida M AU - Fuentes-Cobas L AU - Matutes-Aquino JA AD - Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoUniv Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, EnglandGonzalez-Sandoval, MP, Ctr Invest Mat Avanzados, SC Miguel de Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Mexico TI - Comparative study of the microstructural and magnetic properties of spinel ferrites obtained by co-precipitation AB - Spinel cubic ferrites were obtained by co-precipitation methods. Specific structural parameters were obtained by X-ray diffraction (XRD) spectra fitting refinement using the Rietveld method. Comparison of the magnetic properties was performed by vibrational magnetometry and Mossbauer spectroscopy in transmission mode. The particle morphology was studied by transmission electron microscopy (TEM) with in-situ microanalysis using energy dispersive spectrometry. The different morphologies, sizes, material properties and magnetic behaviour between these spinels were analysed and discussed. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Chihuahua PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500047 L2 - magnetically ordered materials;chemical synthesis;x-ray diffraction;transmission electron microscopy;magnetic measurements SO - Journal of Alloys and Compounds 2004 ;369(1-2):190-194 10980 UI - 5283 AU - Gonzalez-Silvera A AU - Santamaria-Del-Angela E AU - Garcia VMT AU - Garcia CAE AU - Millan-Nunez R AU - Muller-Karger F AD - Univ Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoUniv S Florida, Coll Marine Sci, Tampa, FL 33620, USAFundacao Univ Fed Rio Grande, Dept Fis, BR-96901800 Rio Grande, RS, BrazilFundacao Univ Fed Rio Grande, Dept Oceanog, BR-96901800 Rio Grande, RS, BrazilGonzalez-Silvera, A, Univ Autonoma Baja California, Fac Ciencias Marinas, Apart Postal 453, Ensenada 22800, Baja California, Mexico TI - Biogeographical regions of the tropical and subtropical Atlantic Ocean off South America: classification based on pigment (CZCS) and chlorophyll-a (SeaWiFS) variability AB - Tropical and subtropical Atlantic Ocean waters off the coasts of Brazil, Uruguay and Argentina are influenced by a variety of hydrographic processes that lead to a great diversity in the biological system. In situ observations are scarce and sparsely distributed over this zone. Phytoplankton pigment concentrations were estimated utilizing the Coastal Zone Colour Scanner for the area located between 5degreesN and 45degreesS, and from the coast of South America eastward to 25degreesW. Advanced Very High Resolution Radiometer (sea surface temperature) and data from literature were used to differentiate regions, considering space and time variations of the phytoplankton biomass. Monthly pigment concentration time series were used for the period of January 1982 May 1986 as input for a Principal Component Analysis (PCA). The PCA analysis grouped 152 locations into 14 regions, most of them associated to clear surface circulation patterns and hydrographic features. These results were confirmed using monthly composites of chlorophylla concentration from Sea-viewing Wide Field-of-view Sensor for the period September 1997-April 2002. A connection between the 1982/83 and 1997/98 ENSO events and pigment distribution over southern and southeastern Brazil, as well as the Argentinean continental shelf, was clearly evidenced in temporal pigment distributions. Results presented in this work contribute to the idea that ocean colour images are an appropriate tool to identify and follow the seasonal displacement of biogeographical region boundaries. (C) 2004 Elsevier Ltd. All rights reserved MH - Brazil MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Oceanography U5 - J;Article AV - English IS - 0278-4343 UR - ISI:000222078600003 L2 - CZCS;SeaWiFS;oceanic province;phytoplankton;monthly distribution;Southwestern Atlantic Ocean (5 degrees N and 45 degrees S);SEA-SURFACE TEMPERATURE; PHYTOPLANKTON BIOMASS; NORTH-ATLANTIC; BRAZIL; WATER; SHELF; CIRCULATION; DISPERSAL; URUGUAY; FRONT SO - Continental Shelf Research 2004 ;24(9):983-1000 10981 UI - 3443 AU - Gonzalez-Solis D AU - Moravec F AD - Colegio Frontera Sur, ECOSUR, Unidad Chetumal, Chetumal 77900, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicMoravec, F, Colegio Frontera Sur, ECOSUR, Unidad Chetumal, Ave Centenario Km 5-5,AP 424, Chetumal 77900, Mexico TI - Two new nematode species, Orientatractis campechensis n. sp and Orientatractis chiapasensis n. sp (Nematoda : Atractidae) from cichlid fishes in southern Mexico and Nicaragua AB - Two new nematode species, Orientatractis campechensis n. sp. and Orientatractis chiapasensis n. sp. (Atractidae, Cosmocercoidea), are described from the intestine of cichlid fishes collected in localities of southeastern Mexico and Nicaragua. These atractid nematodes are characterized by the presence of a cephalic end armed with 4 marked, Y-shaped, well-sclerotized pieces, consisting of 2 "horns" extending outward and downward and immediately below a single-horned structure. Both new species differ from the other 2 species of Orientatractis (Orientatractis leiperi and Orientatractis levanhoai) mainly in the body measurements, presence of a vulvar appendix, lengths of spicules and of the gubernaculum, distribution of caudal papillae, and the number of anterior sclerotized structures. Morphological and biometrical variations were evident among specimens from different hosts and localities, with the larger organisms being collected from Vieja bifasciata and Cichlasoma pearsei. Orientatractis compechensis and O. chiapasensis represent the first 2 species of this genus parasitizing freshwater fishes; the other species have been found in amphibians and reptiles MH - Czech Republic MH - Mexico|Quintana Roo PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000226343900038 SO - Journal of Parasitology 2004 ;90(6):1443-1449 10982 UI - 5560 AU - Gonzalez-Tovar E AU - Jimenez-Angeles F AU - Messina R AU - Lozada-Cassou M AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Dusseldorf, Inst Theoret Phys 2, D-40225 Dusseldorf, GermanyUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoLozada-Cassou, M, Inst Mexicano Petr, Programa Ingn Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - A new correlation effect in the Helmholtz and surface potentials of the electrical double layer AB - The restricted primitive model of an electrical double layer around a spherical macroparticle is studied by using integral equation theories and Monte Carlo simulations. The resulting theoretical curves for the Helmholtz and surface potentials versus the macroparticle charge show an unexpected positive curvature when the ionic size of uni- and divalent electrolyte species is increased. This is a novel effect that is confirmed here by computer experiments. An explanation of this phenomenon is advanced in terms of the adsorption and layering of the electrolytic species and of the compactness of the diffuse double layer. It is claimed that the interplay between electrostatic and ionic size correlation effects, absent in the classical Poisson-Boltzmann view, is responsible for this singularity. (C) 2004 American Institute of Physics MH - Germany MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000221268300042 L2 - HYPERNETTED CHAIN APPROXIMATION; MODIFIED POISSON-BOLTZMANN; MEAN SPHERICAL APPROXIMATION; MONTE-CARLO; PRIMITIVE MODEL; COLLOID PARTICLE; CHARGED FLUIDS; ELECTROLYTES; IONS; SIMULATION SO - Journal of Chemical Physics 2004 ;120(20):9782-9792 10983 UI - 5894 AU - Gonzalez AE AU - Odriozola G AU - Leone R AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoInst Mexicano Petr, Coordinac Ingn Mol, Mexico City 07730, DF, MexicoUniv Republica, Fac Quim, Dept Quim Fis & Matemat, Montevideo 11800, UruguayGonzalez, AE, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, A Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Colloidal aggregation with sedimentation: concentration effects AB - The results of computer models for colloidal aggregation, that consider both Brownian motion and gravitational drift experienced by the colloidal particles and clusters, are extended to include concentrations spanning three orders of magnitude. In previous publications and for a high colloidal concentration, it was obtained that the aggregation crosses over from diffusion-limited colloidal aggregation (DLCA) to another regime with a higher cluster fractal dimension and a speeding up followed by a slowing down of the aggregation rate. In the present work we show, as the concentration is decreased, that we can still cross over to a similar regime during the course of the aggregation, as long as the height of the sample is increased accordingly. Among the differences between the mentioned new regimes for a high and a low colloidal concentration, the cluster fractal dimension is higher for the high concentration case and lowers its value as the concentration is decreased, presumably reaching for low enough concentrations a fixed value above the DLCA value. It is also obtained the fractal dimension of the sediments, arising from the settling clusters that reach the bottom and continue a 2D-like diffusive motion and aggregation, on the floor of the container. For these clusters we now see two and sometimes three regimes, depending on concentration and sedimentation strength, with their corresponding fractal dimensions. The first two coming from the crossover already mentioned, that took place in the bulk of the sample before the cluster deposition, while the third arises from the two-dimensional aggregation on the floor of the container. For these bottom clusters we also obtain their dynamical behavior and aggregation rate MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Uruguay PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Physics, Applied;Polymer Science U5 - J;Article AV - English IS - 1292-8941 UR - ISI:000220496100007 L2 - COMPUTER-SIMULATIONS; SUSPENSIONS; KINETICS SO - European Physical Journal e 2004 ;13(2):165-178 10984 UI - 6254 AU - Gonzalez AE AU - Martinez-Lopez F AU - Moncho-Jorda A AU - Hidalgo-Alvarez R AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Granada, Grp Fis Fluidos & Biocoloides, Dept Fis Aplicada, Granada 18071, SpainGonzalez, AE, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Simulations of colloidal aggregation with short- and medium-range interactions AB - Extensive numerical simulations are used to simulate the aggregation of colloidal particles confined in a two-dimensional space. The colloidal particles experience short- or medium-range repulsions coming from a potential barrier that inhibits the aggregation of the particles into the primary minimum of the potential. When the potential barrier is short ranged, we find the usual reaction-limited colloidal aggregation (RLCA) or diffusion-limited colloidal aggregation cluster fractal dimensions for a high or low barrier, respectively. However, for medium-ranged, shallow barriers, for which the aggregation takes a long time as in the RLCA case, a very low fractal dimension is obtained, reaching values as low as 1.2 for the longer-ranged potentials considered. Nevertheless, as the aggregation proceeds, the cluster fractal dimension crosses over to a value close to the RLCA one, indicating that the small clusters of low fractal dimensionality act as the aggregating units of an RLCA system, given that they take a long time to react. A correspondence is made between our results and the experimental results by Hurd and Schaefer (Phys. Rev. Lett. 54 (1985) 1043). (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000188758600016 L2 - colloidal aggregation;fractal dimension;potential barriers;DIFFUSION-LIMITED AGGREGATION; AIR-LIQUID INTERFACE; 2 DIMENSIONS; CLUSTERS SO - Physica A-Statistical Mechanics and Its Applications 2004 ;333():257-268 10985 UI - 5406 AU - Gonzalez BE AU - Martinez-Aguilar G AU - Mason EO AU - Kaplan SL AD - Baylor Coll Med, Dept Pediat, Infect Dis Sect, Houston, TX 77030, USABaylor Coll Med, Baylor Int Pediat Aids Initiat, Houston, TX 77030, USAInst Mexicano Seguro Social, Med Res Unit Clin Epidemiol, Durango, MexicoGonzalez, BE, Baylor Coll Med, Dept Pediat, Infect Dis Sect, Houston, TX 77030 USA TI - Azithromycin compared with beta-lactam antibiotic treatment failures in pneumococcal infections of children AB - Objective: To determine whether treatment failures occurred more commonly with azithromycin than with P-lactam antibiotics in children who developed invasive pneumococcal disease within 30 days of receiving prior antimicrobial therapy. Methods: Retrospective review of medical records of children evaluated at Texas Children's Hospital between 1996 and 2002 who had received antimicrobials (azithromycin or a beta-lactam antibiotic) and developed invasive pneumococcal disease within 30 days. Treatment failure was defined as invasive pneumococcal infection that occurred while taking antimicrobials or within 3 days of stopping azithromycin treatment or 1 day of stopping beta-lactam treatment. Penicillin and azithromycin susceptibilities were determined and categorized according to National Committee for Clinical Laboratory Standards guidelines. Results: We identified 21 and 33 children with similar demographic features who had developed invasive pneumococcal disease within 1 month of receiving azithromycin or a beta-lactam antibiotic, respectively. Eleven (52%) children in the azithromycin group and 11 (33%) in the beta-lactam group met the definition for treatment failures (P = 0.34). Eight treatment failures while receiving azithromycin were caused by pneumococci with the macrolide-resistant (M) phenotype, 2 with the macrolide-, lincosamide- and streptogramin B-resistant (MLSB) phenotype and 1 by a macrolid-susceptible organism. In the beta-lactam group 7 had a penicillin-resistant isolate, 3 had an intermediately susceptible isolate and I had a susceptible isolate. Conclusions: Our study suggests that treatment failures among patients who developed invasive disease within 30 days of receiving an antimicrobial occur as frequently in patients who receive beta-lactam antibiotics as in those who receive azithromycin. Furthermore macrolide resistant organisms are not more likely to be recovered after a macrolide treatment failure than a penicillin-nonsusceptible isolate being recovered after a beta-lactam treatment failure (P = 1.0) MH - Mexico|Durango MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 9 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000221509000003 L2 - Streptococcus pneumoniae;macrolides;treatment failures;RESISTANT STREPTOCOCCUS-PNEUMONIAE; COMMUNITY-ACQUIRED PNEUMONIA; MACROLIDE RESISTANCE; PENICILLIN-RESISTANT; UNITED-STATES; OTITIS-MEDIA; BACTEREMIA; THERAPY; CLARITHROMYCIN; MENINGITIS SO - Pediatric Infectious Disease Journal 2004 ;23(5):399-405 10986 UI - 3907 AU - Gonzalez C AU - Corbacho AM AU - Eiserich JP AU - Garcia C AU - Lopez-Barrera F AU - Morales-Tlalpan V AU - Barajas-Espinosa A AU - az-Munoz M AU - Rubio R AU - Lin SH AU - de la Escalera GM AU - Clapp C AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Queretaro 76230, QRO, MexicoUniv Calif Davis, Dept Internal Med, Div Pulm, Davis, CA 95616, USAUniv Calif Davis, Dept Internal Med, Div Nephrol, Davis, CA 95616, USAUniv San Luis Potosi, Dept Physiol, San Luis Potosi, SLP, MexicoUniv Texas, MD Anderson Canc Ctr, Dept Mol Pathol, Houston, TX 77030, USAClapp, C, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Queretaro 76001, QRO, Mexico TI - 16K-Prolactin inhibits activation of endothelial nitric oxide synthase, intracellular calcium mobilization, and endothelium-dependent vasorelaxation AB - Activation of endothelial nitric oxide synthase ( eNOS) and subsequent nitric oxide production ( NO) are events that mediate the effect of important angiogenic, vasopermeability, and vasorelaxation factors, including vascular endothelial growth factor (VEGF), bradykinin (BK), and acetylcholine (ACh). The N-terminal 16-kDa fragment of prolactin (16K-PRL) acts on endothelial cells to inhibit angiogenesis both in vivo and in vitro. Here, we show that 16K-PRL inhibits VEGF-induced eNOS activation in endothelial cells. Inhibition of eNOS activation may mediate the antiangiogenic properties of 16K-PRL, because the NO donor (Z)-1-[2-(2-aminoethyl)N-( 2-ammonio-ethyl) amino] diazen-1-ium-1,2- diolate ( DETANONOate) prevented 16K-PRL from blocking the VEGF-induced proliferation of endothelial cells. In addition, 16K-PRL inhibited eNOS activation by BK and blocked the BK-evoked transient increase in intracellular Ca2+ in endothelial cells. This finding suggests that 16K-PRL interferes with the mobilization of intracellular Ca2+, thereby inhibiting the Ca2+-dependent activation of eNOS. Blockage of eNOS activation can lead to inhibition of vasodilation. Consistently, 16K-PRL inhibited BK-induced relaxation of coronary vessels in isolated perfused guinea pig hearts. Moreover, 16K-PRL inhibited eNOS activation induced by ACh, and this action resulted in the inhibition of both ACh-evoked relaxation of coronary vessels in isolated perfused rat hearts and ACh-induced, endothelium-dependent relaxation of rat aortic segments. In conclusion, 16K-PRL can block the Ca2+-mediated activation of eNOS by three different vasoactive substances, and this action results in the inhibition of both angiogenesis and vasorelaxation MH - Mexico|Queretaro MH - Mexico|San Luis Potosi MH - USA PB - CHEVY CHASE: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 17 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0013-7227 UR - ISI:000225109400038 L2 - N-TERMINAL FRAGMENT; GROWTH-FACTOR; HUMAN PROLACTIN; ANGIOGENESIS INHIBITOR; PROTEOLYTIC CLEAVAGE; 16-KDA PROLACTIN; CELLS; EXPRESSION; RAT; GENE SO - Endocrinology 2004 ;145(12):5714-5722 10987 UI - 4592 AU - Gonzalez C AU - Corbacho AM AU - Garcia C AU - Macotela Y AU - Eiserich JP AU - Morales V AU - Diaz M AU - de la Escalera GM AU - Clapp C AD - Natl Autonomous Univ Mexico, Neurobiol Inst, Mexico City, DF, MexicoUniv Calif Davis, Dept Internal Med, Davis, CA, USA TI - 16K-prolactin inhibits nitric oxide production and calcium mobilization in endothelial cells MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0022-2828 UR - ISI:000221181400112 SO - Journal of Molecular and Cellular Cardiology 2004 ;36(4):636-636 10988 UI - 3778 AU - Gonzalez FJ AU - Alda J AU - Ilic B AU - Boreman GD AD - Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi, MexicoUniv Complutense Madrid, Sch Opt, Madrid 28037, SpainCornell Univ, Cornell NanoScale Sci & Technol Facil, Ithaca, NY 14853, USAUniv Cent Florida, Sch Opt, Cre Res & Educ Opt & Lasers, Orlando, FL 32816, USAGonzalez, FJ, Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, Alvaro Obregon 64, San Luis Potosi, Mexico TI - Infrared antennas coupled to lithographic Fresnel zone plate lenses AB - Several designs for Fresnel zone plate lenses (FZPLs) to be used in conjunction with antenna-coupled infrared detectors have been fabricated and tested. The designs comprise square and circular FZPLs with different numbers of Fresnel zones working in transmissive or reflective modes designed to focus infrared energy on a square-spiral antenna connected to a microbolometer. A 163x maximum increase in response was obtained from a 15-zone circular FZPL in the transmissive mode. Sensor measurements of normalized detectivity D* resulted in a 2.67x increase with FZPLs compared with measurements made of square-spiral antennas without FZPLs. The experimental results are discussed and compared with values obtained from theoretical calculations. (C) 2004 Optical Society of America MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000225531600001 L2 - MICROBOLOMETERS SO - Applied Optics 2004 ;43(33):6067-6073 10989 UI - 5350 AU - Gonzalez GM AU - Tijerina R AU - Najvar LK AU - Bocanegra R AU - Rinaldi MG AU - Graybill JR AD - Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey 64460, Nuevo Leon, MexicoUniv Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, Fungus Testing Lab, San Antonio, TX 78229, USAGonzalez, GM, Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Madero & Dr EA Pequeno S-N,Colonia Mitras Ctr, Monterrey 64460, Nuevo Leon, Mexico TI - Efficacies of amphotericin B (AMB) lipid complex, AMB colloidal dispersion, liposomal AMB, and conventional AMB in treatment of murine coccidioidomycosis AB - The therapeutic efficacy of three lipid formulations of amphotericin B was compared with that of conventional amphotericin B in treatment of murine coccidioidomycosis. All treatments prolonged survival compared with the no-treatment group (P < 0.0001). Although conventional amphotericin B was more active than lipid formulations on reducing quantitative fungal load on a milligram-per-kilogram basis (P < 0.003 to 0.0002), the lipid preparations could be administered at higher doses, sterilizing liver and spleen tissues. The efficacies of the lipid preparations were similar in this murine model of coccidioidomycosis MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000221813900033 L2 - CLINICAL-EFFICACY; FORMULATIONS; AMBISOME; FUNGIZONE; SAFETY SO - Antimicrobial Agents and Chemotherapy 2004 ;48(6):2140-2143 10990 UI - 3818 AU - Gonzalez J AU - Shimkus TA AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, MexicoUniv Scranton, Dept Math, Scranton, PA 18510, USAGonzalez, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Matemat, Mexico City 07000, DF, Mexico TI - On the immersion problem for 2(r)-torsion lens spaces AB - Building on the methods and results in [Bol. Soc. Mat. Mexicana (3) 9 (2003) 339; Shimkus, Immersions of 2-torsion lens spaces, Ph.D. Thesis, Lehigh University, 2002] we obtain some new nonimmersion results for 2(r)-torsion lens spaces. In particular, we settle the immersion problem for those (2n + 1)-dimensional lens spaces with alpha(n) = 3 and n odd. The methods are based on the analysis of modified Postnikov towers for lifting the relevant stable normal bundles; Davis and Mahowald's method [Proc. London Math. Soc. (3) 35 (1977) 333] for evaluating k-invariants plays a major role. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000225193600016 L2 - immersions;lens spaces;obstruction theory;modified Postnikov towers;PROJECTIVE SPACES SO - Topology and Its Applications 2004 ;145(1-3):261-275 10991 UI - 4337 AU - Gonzalez JA AU - Miranda JM AU - Feliu S AD - CENIM, Natl Ctr Met Res, Madrid 28040, SpainUniv Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoGonzalez, JA, CENIM, Natl Ctr Met Res, Avda Gregorio Amo 8, Madrid 28040, Spain TI - Considerations on reproducibility of potential and corrosion rate measurements in reinforced concrete AB - This communication analyses information supplied by the electrochemical parameters related to rebar corrosion in reinforced concrete structures (RCS). Corrosion potential and corrosion current density are determined for different sets of conditions. Tests are performed to gather data on conflictive aspects of the two electrochemical parameters, with regard to evaluating the results of RCS inspections. Consideration is made of the limitations of potential measurements if not accompanied by complementary indications such as concrete resistivity, rebar surface area involved in the measurements, or the instrumentally determined corrosion current. The capacity of galvanostatic pulses applied directly on large RCS to offer a reliable guide to corrosion rate of steel reinforcements is discussed. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000224049300008 L2 - reinforced concrete structures;corrosion potential;corrosion rate;inspection;galvanostatic pulses;non-destructive tests;POLARIZATION RESISTANCE; COULOSTATIC METHOD; EQUIVALENT-CIRCUIT; EMBEDDED METAL; STEEL; SYSTEMS; INTERFACE; CHLORIDES; CRACKING; REBARS SO - Corrosion Science 2004 ;46(10):2467-2485 10992 UI - 4038 AU - Gonzalez JR AU - Escamilla MA AU - Ontiveros A AU - Medina R AU - Raventos H AU - Contreras S AU - Nicolini H AU - Dassori A AU - Mendoza R AU - Camacho A AU - Ramirez M AU - Cano E AU - Armas R AU - Esparza E AU - Munoz R AU - Salazar R AU - Montero AP AD - Univ Texas, Hlth Sci Ctr, San Antonio, TX, USAInst Informat & Invest Saludad Mental, Monterrey, MexicoUniv Costa Rica, San Jose, Costa RicaGrp Estudios Med & Familiares Carracci, Mexico City, DF, MexicoHarbor Univ Calif Los Angeles Res & Educ Inst, Los Angeles, CA, USALogan Hts Family Clin, San Diego, CA, USAUniv Calif San Francisco, Langley Porter Psychiat Inst, San Francisco, CA 94143, USA TI - Diagnostic interview for genetic studies (DIGS): Factor structure of the delusion and hallucination items and degree of familial aggregation of the factor scores MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000223742600214 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2004 ;130B(1):57-57 10993 UI - 5239 AU - Gonzalez MC AU - Hanlin RT AU - Ulloa M AU - Aguirre E AD - Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Lab Micromicetes, Mexico City 04510, DF, MexicoUniv Georgia, Dept Plant Pathol, Athens, GA 30602, USAGonzalez, MC, Natl Autonomous Univ Mexico, Inst Biol, Dept Bot, Lab Micromicetes, Mexico City 04510, DF, Mexico TI - Poroleprieuria, a new xylariaceous genus from Mexico AB - Poroleprieuria gen. nov. is described and illustrated to accommodate P rogersii in the Xylariaceae, Xylariales. This ascomycete, known only from the type collection, is characterized by reniform, light brown, smooth ascospores with a germ pore; cylindrical, persistent asci lacking an apical apparatus, septate persistent paraphyses, and erumpent, erect, dark brown, fragile, subcylindrical stromata. The characteristics of this xylariaceous fungus were compared with those of some other ascomycetes having superficially similar cylindrical stromata or ascospores with germ pores MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: ALLEN PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000222022000023 L2 - ascomycota;Leprieuria;lignicolous;systematics;Xylariaceae;Xylariales;HYPOXYLON; CAMILLEA; TAXA SO - Mycologia 2004 ;96(3):675-681 10994 UI - 5573 AU - Gonzalez OG AU - Garcia RM AU - de la Garza M AU - Vaca S AU - Paniagua GL AU - Mejia R AU - Tenorio VR AU - Negrete-Abascal E AD - UNAM, Carrera Biol, Fac Estudios Super Iztacala, Tlalnepantla 54090, Mexico, MexicoKarolinska Inst, Dept Oncol Pathol, Karolinska Hosp, Ctr Canc, SE-17176 Stockholm, SwedenInst Politecn Nacl, CINVESTAV, Dept Expt Pathol, Mexico City 07000, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Biol Celular, Mexico City 07000, DF, MexicoCENID Microbiol, Mexico City 05110, DF, MexicoNegrete-Abascal, E, UNAM, Carrera Biol, Fac Estudios Super Iztacala, Av de los Barrios 1, Tlalnepantla 54090, Mexico, Mexico TI - Actinobacillus pleuropneumoniae metalloprotease: cloning and in vivo expression AB - The complete amino acid and nucleotide sequence of a secreted metalloprotease produced by Actinobocillus pleuropneumoniae serotype 1 is reported. A clone showing proteolytic activity in cell-free culture media was selected from a genomic library of A. pleuropneumoniae serotype 1 in pUC 19. The sequence obtained contained an open reading frame encoding a protein with 869 amino acids. This protein was identified as a zinc neutral-metalloprotease belonging to the aminopeptidase family, with a predicted rnolecular weight of approximately 101 kDa. This sequence showed high homology with other predicted or sequenced aminopeptidases reported for different Gram-negative bacteria. Expression of the protease was observed in lung tissue from pigs that died of porcine pleuropneumonia suggesting a role in pathogenesis. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000221218300011 L2 - protease;pathogenicity;porcine pleuropneumonia;Escherichia coli;PASTEURELLA-HAEMOLYTICA LEUKOTOXIN; PSEUDOMONAS-AERUGINOSA; PROTEASES; PATHOGENESIS; SEROTYPE-1; HEMOLYSIN; KERATITIS; PROTEINS; SWINE SO - Fems Microbiology Letters 2004 ;234(1):81-86 10995 UI - 6210 AU - Gonzalez PR AU - Furetta C AU - Azorin J AU - Rivera T AU - Kitis G AU - Sepulveda F AU - Sanipoli C AD - Inst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoAristotle Univ Thessaloniki, Nucl Phys Lab, GR-54006 Thessaloniki, GreeceInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Roma La Sapienza, Dept Phys, I-00185 Rome, ItalyGonzalez, PR, Inst Nacl Invest Nucl, AP 18-1027, Mexico City 11801, DF, Mexico TI - Thermoluminescence (TL) characterization of the perovskite-like KMgF3, activated by Lu impurity AB - This paper reports the thermoluminescent characteristics of a new production of perovskite KMgF3 activated by Lu ions. Linearity, reproducibility, fading and other properties have been investigated. Because of the presence of K-40 in the compound, the self dose effect has been investigated. Furthermore, the Sequential Quadratic Programming Glow Curve Deconvolution (SQPGCD) technique has been used for the determination of the kinetic parameters, i.e., activation energy, frequency and pre-exponential factors of the trapping centers, and the kinetic order of the recombination process. (C) 2004 Kluwer Academic Publishers MH - Greece MH - Italy MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000188942700010 L2 - THERMALLY STIMULATED LUMINESCENCE; SELF-IRRADIATION; CRYSTALS; DOSIMETERS; SUPRALINEARITY; DEFECTS; IONS; CE SO - Journal of Materials Science 2004 ;39(5):1601-1607 10996 UI - 5266 AU - Gonzalez R AU - Reguera E AU - Mendoza L AU - Figueroa JM AU - Sanchez-Sinencio F AD - Univ Havana, Fac Chem, Havana 10400, CubaUniv Havana, Inst Mat & Reagents, Havana 10400, CubaIPN, Ctr Appl Sci & Adv Technol, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Phys, Mexico City 07738, DF, MexicoReguera, E, Apartado Postal 6313,Habana 6, Havana 10600, Cuba TI - Physicochemical changes in the hull of corn grains during their alkaline cooking AB - The alkaline cooking of corn in a solution of Ca(OH)(2) to produce corn-based foods is oriented to make corn proteins available, to incorporate Ca to the cooked grains, and also to remove the corn hull. This process (nixtamalization) is known in Mexico and Guatemala from prehispanic times; however, the effect of the alkaline cooking on the corn hull remains poorly documented. In this work, the physicochemical changes that take place in the corn hull during its cooking in a saturated solution of Ca(OH)(2) were studied using infrared, X-ray diffraction, C-13 cross-polarization/magic-angle spinning (CP/MAS) NMR, confocal imaging microscopy, differential scanning calorimetry, and thermogravimetry techniques. The main effect of this treatment on the hull is the removal of hemicelluloses and lignin, increasing the hull permeability and, as a consequence, facilitating the entry of the alkaline solution into the corn kernel. No significant changes were observed in the cellulose fiber network, which remains as native cellulose 1, with a crystalline index, according to C-13 CP/MAS NMR spectra, of 0.60. The alkaline treatment does not allow the cellulose fibers to swell and their regeneration in the form of cellulose(II). It seems any attempt to make use of the Ca binding capacity of the hull to increase the Ca availability in nixtamalized corn-based foods requires a separated treatment for the hull and kernel. On alkaline cooking, the hull hemicellulose fraction dissolves, losing its ability to bind Ca as a way to incorporate this element into foods elaborated from nixtamalized corn MH - Cuba MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000221963100023 L2 - MAIZE KERNELS; CELLULOSE I; NIXTAMALIZATION; COMPONENTS; BRAN SO - Journal of Agricultural and Food Chemistry 2004 ;52(12):3831-3837 10997 UI - 4725 AU - Gonzalez RA AU - Liu MC AU - Bruzual GA AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58190, Michoacan, MexicoUniv Hawaii, Inst Astron, Honolulu, HI 96822, USACtr Invest Astron, Merida 5101A, VenezuelaGonzalez, RA, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Campus Morelia, Morelia 58190, Michoacan, Mexico TI - Infrared surface brightness fluctuations of Magellanic star clusters AB - We present surface brightness fluctuations (SBFs) in the near-IR for 191 Magellanic star clusters available in the Second Incremental and All Sky Data releases of the Two Micron All Sky Survey (2MASS) and compare them with SBFs of Fornax Cluster galaxies and with predictions from stellar population models as well. We also construct color-magnitude diagrams (CMDs) for these clusters using the 2MASS Point Source Catalog (PSC). Our goals are twofold. The first is to provide an empirical calibration of near-IR SBFs, given that existing stellar population synthesis models are particularly discrepant in the near-IR. Second, whereas most previous SBF studies have focused on old, metal-rich populations, this is the first application to a system with such a wide range of ages (similar to10(6) to more than 10(10) yr, i.e., 4 orders of magnitude), at the same time that the clusters have a very narrow range of metallicities (Zsimilar to0.0006-0.01, i.e., 1 order of magnitude only). Since stellar population synthesis models predict a more complex sensitivity of SBFs to metallicity and age in the near-IR than in the optical, this analysis offers a unique way of disentangling the effects of age and metallicity. We find a satisfactory agreement between models and data. We also confirm that near-IR fluctuations and fluctuation colors are mostly driven by age in the Magellanic cluster populations and that in this respect they constitute a sequence in which the Fornax Cluster galaxies fit adequately. Fluctuations are powered by red supergiants with high-mass precursors in young populations and by intermediate-mass stars populating the asymptotic giant branch in intermediate-age populations. For old populations, the trend with age of both fluctuation magnitudes and colors can be explained straightforwardly by evolution in the structure and morphology of the red giant branch. Moreover, fluctuation colors display a tendency to redden with age that can be fitted by a straight line. For the star clusters only, ((H) over bar-(K) over bar (s))= (0.21+/-0.03)log (age)-(1.29+/-0.22); once galaxies are included, ((H) over bar-(K) over bar (s))=(0.20+/-0.02) log (age)-(1.25+/-0.16). Finally, we use for the first time a Poissonian approach to establish the error bars of fluctuation measurements, instead of the customary Monte Carlo simulations MH - Mexico|Michoacan MH - USA MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223236000022 L2 - astronomical data bases : miscellaneous;galaxies : distances and redshifts;galaxies : star clusters;Magellanic Clouds;stars : AGB and post-AGB;STANDARD STELLAR LIBRARY; INITIAL MASS FUNCTION; EARLY-TYPE GALAXIES; RED GIANT BRANCH; GLOBULAR-CLUSTERS; EVOLUTIONARY SEQUENCES; RADIATIVE OPACITIES; FORNAX CLUSTER; POPULATION SYNTHESIS; DISTANCE INDICATOR SO - Astrophysical Journal 2004 ;611(1):270-293 10998 UI - 5011 AU - Gonzalez RA AU - Brown JT AU - Weilacher RP AU - Nelson MA AD - Grupo Pavisa, Naucalpan, MexicoGMIC, Corning, NY, USAGlass Design Inc, Sapulpa, OK, USAGonzalez, RA, Grupo Pavisa, Naucalpan, Mexico TI - Improved silica crown refractory for oxy-fuel-fired glassmeter MH - Mexico|Estado De Mexico MH - USA PB - WESTERVILLE: AMER CERAMIC SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0002-7812 UR - ISI:000222500600043 SO - American Ceramic Society Bulletin 2004 ;83(5): 10999 UI - 3809 AU - Gonzalez RF AU - Dal Pino EMD AU - Raga AC AU - Velazquez PF AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sao Paulo, Inst Astron & Geofis, BR-05508090 Sao Paulo, BrazilGonzalez, RF, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Numerical modeling of eta Carinae bipolar outflows AB - In this paper, we present two-dimensional gasdynamic simulations of the formation and evolution of the eta Car bipolar outflows. Adopting the interacting nonspherical winds model, we have carried out high-resolution numerical simulations, which include explicitly computed time-dependent radiative cooling, for different possible scenarios of the colliding winds. In our simulations, we consider different degrees of nonspherical symmetry for the preoutburst wind and the great eruption of the 1840s produced by the eta Car wind. Different models show important differences in the shape and kinematical properties of the Homunculus structure. In particular, we search for the appropriate combination of wind parameters (which control the degree of nonspherical symmetry) to obtain the numerical results that best match both the observed morphology and the expansion velocity of the eta Car bipolar shell. In addition, our numerical simulations show the formation of a bipolar nebula embedded within the Homunculus (the little Homunculus) that developed from a secondary eruptive event suffered by the star in the 1890s, and also the development of tenuous, high-velocity ejections in the equatorial region that resulted from the impact of the eruptive wind of the 1840s with the preoutburst wind; these ejections could explain some of the high-speed features observed in the equatorial ejecta. The models were, however, unable to produce the equatorial ejections associated with the second eruptive event MH - Brazil MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225418100024 L2 - hydrodynamics;ISM : general;shock waves;stars : individual (eta Carinae);stars : winds, outflows;LUMINOUS BLUE VARIABLES; RADIATION-DRIVEN WINDS; HOMUNCULUS-NEBULA; PROPER MOTIONS; STELLAR WINDS; HIGH-VELOCITY; O-STARS; SIMULATIONS; EMISSION; MASS SO - Astrophysical Journal 2004 ;616(2):976-987 11000 UI - 6468 AU - Gonzalez RF AU - Dal Pino EMD AU - Raga AC AU - Velazquez PF AD - USP, Inst Astron & Geofis, BR-05508090 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGonzalez, RF, USP, Inst Astron & Geofis, Rua Matao 1226, BR-05508090 Sao Paulo, Brazil TI - Gasdynamical simulations of the large and little homunculus nebulae of eta carinae AB - Here we present two-dimensional, time-dependent radiatively cooling hydrodynamical simulations of the large and little Homunculus nebulae around h Carinae. We employ an alternative scenario to previous interacting stellar wind models that is supported by both theoretical and observational evidence, where a nonspherical outburst wind (with a latitudinal velocity dependence that matches the observations of the large Homunculus), which is expelled for 20 years, interacts with a preeruptive slow wind also with a toroidal density distribution but with a much smaller equator-to-polar density contrast than that assumed in previous models. A second eruptive wind with spherical shape is ejected about 50 years after the first outburst and causes the development of the little internal nebula. We find that as a result of an appropriate combination of the parameters that control the degree of asymmetry of the interacting winds, we are able to produce not only the structure and kinematics of both Homunculus but also the high-velocity equatorial ejecta. These arise from the impact between the nonspherical outburst and the preoutburst winds in the equatorial plane MH - Brazil MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188206000015 L2 - hydrodynamics;shock waves;stars : individual (eta Carinae);stars : winds, outflows;LUMINOUS BLUE VARIABLES; STELLAR WIND; COLLISION; STARS SO - Astrophysical Journal 2004 ;600(1):L59-L62 11001 UI - 3949 AU - Gonzalez RJ AU - Luo YG AU - Ruiz-Cruz S AU - Mcevoy JL AD - USDA ARS, Produce Qual & Safety Lab, Beltsville Agr Res Ctr, Beltsville, MD 20705, USAUniv Minnesota, Sch Med, Dept Lab Med & Pathol, Minneapolis, MN 55425, USACtr Res Food & Dev, Hort Prod & Cereal Technol, Hermosillo 83000, Sonora, MexicoLuo, YG, USDA ARS, Produce Qual & Safety Lab, Beltsville Agr Res Ctr, 10300 Baltimore Ave,Bldg 002,Room 117, Beltsville, MD 20705 USA TI - Efficacy of sanitizers to inactivate Escherichia coli O157 : H7 on fresh-cut carrot shreds under simulated process water conditions AB - Chlorine is widely used as a sanitizer to maintain the microbial quality and safety of fresh-cut produce; however, chlorine treatment lacks efficacy on pathogen reduction, especially when the fresh-cut processing water contains heavy organic loads. A more efficacious sanitizer that can tolerate the commercial processing conditions is needed to maintain microbial safety of fresh-cut produce. This Study evaluated the efficacy of Escherichia coli O157:H7 reduction on fresh-cut carrots using new and traditional sanitizers with tap water and fresh-cut processing water scenarios. Fresh-cut carrot shreds inoculated with E. Coli O157:H7 were washed in sanitizer solutions including 200 ppm chlorine, citric acid-based sanitizer (Pro-San), 80 ppm peroxyacefic acid-based sanitizer (Tsunami 100), and 1,000 ppm acidified sodium chlorite (SANOVA) prepared in fresh tap water or simulated processing water with a chemical oxygen demand level of approximately 3,500 mg/liter. Samples were packaged and stored at 5degreesC. Microbial analyses performed at days 0, 7, and 14 indicate that the organic load in the process water significantly affected the efficacy of chlorine on pathogen removal and was especially evident on samples tested during storage. Acidified sodium chlorite provided a strong pathogen reduction even under process water conditions with up to a 5.25-log reduction when compared with the no-wash control. E. coli O157:H7 was not recovered on acidified sodium chlorite-treated samples during the entire 14 days of storage, even following an enrichment step. These results suggest that acidified sodium chlorite holds considerable promise as an alternative sanitizer of fresh-cut produce MH - USA MH - Mexico|Sonora PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000224940200004 L2 - LISTERIA-MONOCYTOGENES; ACID TOLERANCE; VEGETABLES; DISINFECTANT; SURVIVAL; LETTUCE SO - Journal of Food Protection 2004 ;67(11):2375-2380 11002 UI - 6533 AU - Gonzalez S AU - Sousa C AU - Illas F AD - Univ Barcelona & Parc Cientif Barcelona, Dept Quim Fis, Barcelona 08028, SpainUniv Barcelona & Parc Cientif Barcelona, Ctr Especial Recerca Quim Teor, Barcelona 08028, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoIllas, F, Univ Barcelona & Parc Cientif Barcelona, Dept Quim Fis, Cl Marti & Franques 1, Barcelona 08028, Spain TI - Electric field effects in the chemisorption of CO on bimetallic RhCu surface models AB - Cluster models and hybrid density functional theory calculations are used to study the effect of an external electric field on the properties and bonding mechanism of CO on various RhCu bimetallic surfaces. The presence of an external electric field induces changes in the geometry and vibrational frequency of the chemisorbed molecule. Several methods of analysis establish that the electric field effects are not just of electrostatic nature but do affect the bonding mechanisms as well. In any case, the electric field effects observed for various RhCu bimetallic surfaces are not at all different from what is known for monometallic surfaces. The present study permits to conclude that the effect of an external electric field on the properties of CO adsorbed on bimetallic RhCu surfaces of different composition follows the same trend exhibited by the single metal surfaces. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000187751300027 L2 - metallic surfaces;alloys;surface electronic phenomena (work function;surface potential, surface states, etc.);density functional calculations;carbon monoxide;chemisorption;VIBRATIONAL FREQUENCY-SHIFTS; DENSITY-FUNCTIONAL THEORY; CLUSTER MODEL; CARBON-MONOXIDE; ELECTROCHEMICAL PROMOTION; DEPENDENT CHEMISORPTION; CATALYTIC ACTIVITY; NITRIC-OXIDE; ADSORPTION; CU(100) SO - Surface Science 2004 ;548(1-3):209-219 11003 UI - 3891 AU - Gonzalez SB AU - Bandoni AL AU - van Baren C AU - Lira PD AU - Cerda-Garcia-Rojas CM AU - Joseph-Nathan P AD - Univ Nacl Patagonia, Fac Ciencias Nat, Catedra Quim Organ, RA-9200 Esquel, Chubut, ArgentinaUniv Buenos Aires, Fac Farm & Bioquim, Catedra Farmacognosia, RA-1113 Buenos Aires, DF, ArgentinaInst Politecn Nacl, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoGonzalez, SB, Univ Nacl Patagonia, Fac Ciencias Nat, Catedra Quim Organ, Sede Esquel,Ruta 259,Km 4, RA-9200 Esquel, Chubut, Argentina TI - The essential oil of the aerial parts of Adesmia boronioides Hook. f AB - The leaves and stems of Adesmia boronioides Hook. f collected in Patagonia, Argentina, were subjected to hydrodistillation yielding 0.3-1.5% of essential oils according to the season. The oils were analyzed by GC and GC/MS. The main constituents were two novel bisnorsesquiterpenes: esquel-6-en-9-one (19.1%) and esquel-7-en-9-one (12.5%), as well as alpha-copaen-11-ol(8.5%),delta-cadinene (5.1%), 10-epi-gamma-eudestmol(4.6%),4alpha-hydroxydiliydroagarofuran (3.5%), 1-epi-cubenol (3.5%), and alpha-pinene (3.0%). The very pleasant sweet-woody, licorice-spicy odor of the oil suggests its potential utility in the fragrance industry MH - Argentina MH - Mexico|Distrito Federal PB - CAROL STREAM: ALLURED PUBL CORP RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1041-2905 UR - ISI:000224924700001 L2 - Adesmia boronioides;Fabaceae;essential oil composition;bisnorsesquiterpenes;esquelane derivatives;esquel-6-en-9-one;esquel-7-en-9-one SO - Journal of Essential Oil Research 2004 ;16(6):513-516 11004 UI - 5816 AU - Goodwin DH AU - Flessa KW AU - Tellez-Duarte MA AU - Dettman DL AU - Schone BR AU - vila-Serrano GA AD - Univ Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoGoodwin, DH, Denison Univ, Dept Geol & Geog, FW Olin Sci Hall, Granville, OH 43023 USA TI - Detecting time-averaging and spatial mixing using oxygen isotope variation: a case study AB - In principle, bivalve mollusks living at the same time and in the same place will experience the same temperature and salinity regimes and will have identical annual oxygen isotope (delta(18)O) profiles. Bivalve mollusks living at different times or in different places are more likely to have different annual delta(18)O profiles. Thus, differences in annual delta(18)O profiles can be used to detect temporal or spatial mixing. We devised eight metrics to quantitatively compare sclerochronologically calibrated annual delta(18)O profiles from different shells: difference in maximum value, difference in minimum value, difference in amplitude, the number of non-contemporaneous isotopic enrichment events (NNEE), the average fortnightly difference (AD), the standard deviation of the average fortnightly differences (SDD), the maximum fortnightly difference (MaxD) and the number of fortnights separating the minimum values. These metrics vary among northern Gulf of California shells from four temporal and spatial categories: (1) same time and same place; (2) same time and different place; (3) different time and same place; and (4) different time and different place. Different time/different place comparisons include comparisons of live-collected shells with shells alive during times of Colorado River flow and shells from a Pleistocene interglacial deposit. The same time/same place comparison has the most similar metric values, whereas comparisons among the different time/different place shells are usually the least similar. Between-shell oxygen isotope differences can reveal temporal or spatial mixing of shells that would be undetectable with radiocarbon or amino-acid racemization dating. Application of the technique to a Holocene deposit with shells in life position reveals that the bivalves were alive at different times, despite indistinguishable radiocarbon ages. Two adjacent but disarticulated Pleistocene shells appear to be both temporally and spatially mixed. The method can detect temporal or spatial mixing in any shell material unaffected by diagenesis, regardless of the age of the specimens. (C) 2004 Published by Elsevier B.V MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geography, Physical;Geosciences, Multidisciplinary;Paleontology U5 - J;Article AV - English IS - 0031-0182 UR - ISI:000220534000001 L2 - taphonomy;time-averaging;spatial-mixing;oxygen isotopes;Gulf of California;mollusks;GULF-OF-CALIFORNIA; BIOLOGICAL BEHAVIOR; ACCRETION RATES; COLORADO-RIVER; GROWTH-RATES; RESOLUTION; MEXICO; SHELLS; CHIONE; BEDS SO - Palaeogeography Palaeoclimatology Palaeoecology 2004 ;205(1-2):1-21 11005 UI - 5703 AU - Gordon JE AU - Hawthorne WD AU - Reyes-Garcia A AU - Sandoval G AU - Barrance AJ AD - Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, EnglandUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Honduras, Dept Biol, Tegucigalpa, HondurasOverseas Dev Inst, London SE1 7JD, EnglandGordon, JE, Univ Durham, Dept Geog, Sci Site, S Rd, Durham DH1 3LE, England TI - Assessing landscapes: a case study of tree and shrub diversity in the seasonally dry tropical forests of Oaxaca, Mexico and southern Honduras AB - Tropical dry forests, with their distinct and economically important diversity, are acknowledged conservation priorities because of alarming rates of forest conversion. Whilst it is realised that terrestrial conservation requires an understanding of landscape level patterns of diversity, forests are rarely assessed accordingly. Here we demonstrate that, in the case of the seasonally dry tropical forests of the Pacific watershed of Mesoamerica, landscape level assessment of woody diversity can inform decision making relevant to both between-landscape and within-landscape prioritisation. We report floristic surveys of dry forest landscapes in Oaxaca, Mexico and southern Honduras. It is noted that these forests are floristically similar to other seasonally dry tropical forests in the neotropics. By calculation of Genetic Heat Indices, a relative measure of the concentration of restricted range species in a sample, we determine that the conservation of the, tree diversity of the coastal lowlands of Oaxaca should be prioritised over that of southern Honduras. The current conservation status of forested areas in Oaxaca is briefly described. We suggest that the greater degree of anthropogenic disturbance in southern Honduras may explain the relative lack of restricted range species there. We argue that some forest fallows can act as analogues of mature forest and therefore landscape elements other than mature forest need to be included in forest conservation assessments. We conclude that diversity sampling of any forest type should not be limited to mature forests, but extended to other elements of forested landscapes. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Honduras MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000220814600006 L2 - forest conservation;forest fragmentation;forest fallow;biodiversity;FLORISTIC DIVERSITY; CONSERVATION SO - Biological Conservation 2004 ;117(4):429-442 11006 UI - 3825 AU - Gorin T AU - Prosen T AU - Seligman TH AU - Strunz WT AD - Univ Freiburg, D-79104 Freiburg, GermanyUniv Ljubljana, Fac Math & Phys, Dept Phys, SI-1000 Ljubljana, SloveniaCtr Int Ciencias, Cuernavaca, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoGorin, T, Univ Freiburg, Hermann Herder Str 3, D-79104 Freiburg, Germany TI - Connection between decoherence and fidelity decay in echo dynamics AB - Entanglement between a quantum system and its environment leads to loss of coherence in the former. In General, the temporal fate of coherences is complicated. Here, we establish the connection between decoherence of a central system and fidelity decay in the environment for a variety of situations, including both energy conserving and dissipative couplings. We show how properties of unitary time evolution of the environment can be inferred from the nonunitary evolution of coherences in the central system. This opens up promising ways for measuring Loschmidt echoes in a variety of situations MH - Germany MH - Mexico|Morelos MH - Slovenia PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000225322500019 L2 - QUANTUM MOTION; STABILITY; CHAOS SO - Physical Review A 2004 ;70(4): 11007 UI - 6257 AU - Gorin T AU - Prosen T AU - Seligman TH AD - Univ Freiburg, D-79104 Freiburg, GermanyCtr Int Ciencias, Cuernavaca 62131, Morelos, MexicoUniv Ljubljana, Fac Math & Phys, Dept Phys, SI-1000 Ljubljana, SloveniaUniv Mexico UNAM, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoGorin, T, Univ Freiburg, Hermann Herder Str 3, D-79104 Freiburg, Germany TI - A random matrix formulation of fidelity decay AB - We propose to study echo dynamics in a random-matrix framework, where we assume that the perturbation is time-independent, random and orthogonally invariant. This allows us to use a basis in which the unperturbed Hamiltonian is diagonal and its properties are thus largely determined by its spectral statistics. We concentrate on the effect of spectral correlations usually associated with chaos and disregard secular variations in spectral density. We obtain analytical results for the fidelity decay in the linear-response regime. To extend the domain of validity, we heuristically exponentiate the linear-response result. The resulting expressions, exact in the perturbative limit, are accurate approximations in the transition region between the 'Fermi golden rule' and the perturbative regimes, as verified by example for a deterministic chaotic system. To sense the effect of spectral stiffness, we apply our model also to the extreme cases of random spectra and equidistant spectra. In our analytical approximations as well as in extensive Monte Carlo calculations, we find that fidelity decay is fastest for random spectra and slowest for equidistant ones, while the classical ensembles lie in between. We conclude that spectral stiffness systematically enhances fidelity MH - Germany MH - Mexico|Morelos MH - Slovenia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 32 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1367-2630 UR - ISI:000188825200001 L2 - NUCLEAR-MAGNETIC-RESONANCE; POLARIZATION ECHOES; CHAOTIC SYSTEMS; QUANTUM MOTION; SPIN-DIFFUSION; STABILITY; SPECTRA; QUANTIZATION; DECOHERENCE; ATTENUATION SO - New Journal of Physics 2004 ;6(): 11008 UI - 4869 AU - Gorinstein S AU - Leontowicz H AU - Leontowicz M AU - Krzeminski R AU - Gralak M AU - Martin-Belloso O AU - gado-Licon E AU - Haruenkit R AU - Katrich E AU - Park YS AU - Jung ST AU - Trakhtenberg S AD - Hebrew Univ Jerusalem, Hadassah Med Sch, Dept Med Chem & Nat Prod, IL-91120 Jerusalem, IsraelAgr Univ Warsaw, Dept Physiol Sci, PL-02787 Warsaw, PolandUniv Lleida, Dept Food Technol, Lleida 25003, SpainTechnol Inst Durango, Dept Chem & Biochem Engn, Durango 24080, MexicoKing Mondkut Inst Technol, Fac Agr Ind, Bangkok 10520, ThailandMokpo Natl Univ, Dept Hort Sci, Muan Jeonnam 534729, South KoreaMokpo Natl Univ, Dept Food Engn, Muan Jeonnam 534729, South KoreaKaplan Univ, Med Ctr, IL-76100 Rehovot, IsraelGorinstein, S, Hebrew Univ Jerusalem, Hadassah Med Sch, Dept Med Chem & Nat Prod, IL-91120 Jerusalem, Israel TI - Fresh Israeli Jaffa blond (Shamouti) orange and Israeli Jaffa red Star Ruby (Sunrise) grapefruit juices affect plasma lipid metabolism and antioxidant capacity in rats fed added cholesterol AB - The bioactivity of Israeli Jaffa blond (Shamouti) fresh orange and Israeli Jaffa red Star Ruby (Sunrise) grapefruit juices was investigated in vitro and in vivo. The contents of bioactive compounds of these juices were determined. The influence of bioactive compounds on plasma lipids and plasma antioxidant activity in rats fed cholesterol-containing and cholesterol-free diets was assessed. Significant differences in the contents of dietary fibers were not found. The contents of total polyphenols, flavonoids, and anthocyanins in fresh orange and grapefruit juices were 962.1 +/- 27.2 and 906.9 +/- 27.1; 50.1 +/- 3.3 and 44.8 +/- 3.2; and 69.9 +/- 5.6 and 68.7 +/- 5.5 mug/mL, respectively. The antioxidant potential measured by the scavenging activity against nitric oxide, the beta-carotene-linoleate model system (beta-carotene), and the 1,1-diphenyl-2-picrylhydrazyl and 2,2'-azino-bis(3-ethyl-benzothiazoline-6-sulfonic acid) diamonium salt assays was higher in orange juice but not significantly. A high level of correlation between contents of total polyphenols and flavonoids and antioxidant potential values of both juices was found. Diets supplemented with orange and to a lesser degree with grapefruit juices improved plasma lipid metabolism only in rats fed added cholesterol. However, an increase in the plasma antioxidant activity was observed in both groups. In conclusion, fresh orange and grapefruit juices contain high quantities of bioactive compounds, which guarantee their high antioxidant potential, and the positive influence on plasma lipid metabolism and plasma antioxidant activity could make fresh orange and grapefruit juices a valuable supplement for disease-preventing diets MH - Israel MH - Mexico|Durango MH - Poland MH - South Korea MH - Spain MH - Thailand PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000222866000039 L2 - citrus juices;bioactive compounds;plasma lipids;plasma antioxidant activity;rats;DENSITY-LIPOPROTEIN OXIDATION; TOTAL PHENOLICS; DIETARY-FIBERS; CITRUS JUICES; SEED EXTRACTS; HEART-DISEASE; IN-VITRO; FRUITS; RABBITS; ACIDS SO - Journal of Agricultural and Food Chemistry 2004 ;52(15):4853-4859 11009 UI - 4245 AU - Goris J AU - De Vos P AU - Caballero-Mellado J AU - Park J AU - Falsen E AU - Quensen JF AU - Tiedje JM AU - Vandamme P AD - Michigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824, USAState Univ Ghent, Lab Microbiol, B-9000 Ghent, BelgiumUniv Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, P Ecol Mol & Microbiana, Cuernavaca 62191, Morelos, MexicoGothenburg Univ, Dept Clin Bacteriol, Culture Collect, S-41346 Gothenburg, SwedenGoris, J, Michigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824 USA TI - Classification of the biphenyl- and polychlorinated biphenyl-degrading strain LB400(T) and relatives as Burkholderia xenovorans sp nov AB - Strain LB400(T) is the best-studied polychlorinated biphenyl (PCB) degrader. This organism has previously been allocated in the genus Burkholderia, since its 16S rRNA gene sequence shows 98-6% sequence similarity to the type strains of Burkholderia graminis and Burkholderia terricola. A polyphasic study was undertaken to clarify the actual taxonomic position of this biotechnologically important organism and of two strains, one recovered from a blood culture vial and one from a coffee plant rhizosphere, both of which resembled strain LB400T in their whole-cell protein patterns. DNA-DNA hybridization experiments revealed that the three strains represented a single novel species, for which the name Burkholderia xenovorans sp. nov. is proposed. Strains of this novel species can be differentiated phenotypically from nearly all other Burkholderia species by their inability to assimilate L-arabinose. The whole-cell fatty acid profile of B. xenovorans strains is consistent with their classification in the genus Burkholderia, with 18: 1omega7c, 16: 1omega7c, 16:0, 14:0 3OH, 16:0 3OH, 17: 0 cyclo and 14: 0 being the most abundant fatty acids. The G+C content of the species varies between 62-4 and 62-9 mol%. The type strain of B. xenovorans is LB400(T) (=LMG 21463(T)=CCUG 46959(T)=NRRL B-18064(T)) MH - Belgium MH - Mexico|Morelos MH - Sweden MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 49 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000224259100037 L2 - DNA-DNA HYBRIDIZATION; AD-HOC-COMMITTEE; PSEUDOMONAS; DEGRADATION; BACTERIA; REEVALUATION; DIOXYGENASE; DIVERSITY; PATHWAY; GENES SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():1677-1681 11010 UI - 5444 AU - Gosset G AU - Zhang ZG AU - Nayyar SN AU - Cuevas WA AU - Saier MH AD - Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Ingn Celular & Biocatalisis, Cuernavaca 62550, Morelos, MexicoGenencor Int Inc, Palo Alto, CA 94304, USASaier, MH, Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92093, USA TI - Transcriptome analysis of Crp-dependent catabolite control of gene expression in Escherichia coli AB - We report here the transcriptome analyses of highly expressed genes that are subject to catabolite repression or activation mediated by the cyclic AMP receptor protein (Crp). The results reveal that many operons encoding enzymes of central carbon metabolic pathways (e.g., Krebs cycle enzymes), as well as transporters and enzymes that initiate carbon metabolism, are subject to direct Crp-mediated catabolite repression. By contrast, few enzyme-encoding genes (direct regulation) but many ribosomal protein- and tRNA-encoding genes (indirect regulation) are subject to Crp-dependent glucose activation. Additionally, Crp mediates strong indirect catabolite repression of many cytoplasmic stress response proteins, including the major chaperone proteins, five ATP-dependent protease complexes, and several cold and heat shock proteins. These results were confirmed by (i) phenotypic analyses, (ii) real-time PCR studies, (iii) reporter gene fusion assays, and (iv) previously published reports about representative genes. The results;serve to define and extend our appreciation of the Crp regulon MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 31 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000221562300028 L2 - REGULATORY PROTEIN; BACILLUS-SUBTILIS; RECEPTOR PROTEIN; CARBON; GROWTH; ARCA; MLC; PTS; DEHYDROGENASE; TRANSPORTER SO - Journal of Bacteriology 2004 ;186(11):3516-3524 11011 UI - 24 AU - Gourc JP AU - Ramirez RR AD - Univ Grenoble 1, Lirigm, F-38041 Grenoble 9, FranceFdn Univ Amer, Dept Ingn Civil, Puebla, MexicoGourc, JP, Univ Grenoble 1, Lirigm, BP53, F-38041 Grenoble 9, France TI - Dynamics-based interpretation of the interface friction test at the inclined plane AB - The inclined plane test is used to determine either soil-geosynthetic or geosynthetic geosynthetic interface properties, especially in cases where the stress normal to the interface is small. The design of sloped cap covers for landfill sites or along the banks of reservoirs and canals necessitates this type of test. The interface friction test, when performed in accordance with the current European test standard, yields only the interface friction angle. In this paper, the potential for drawing considerably greater information from the test is demonstrated. This procedure requires the interpretation of an entire dynamics phase, in particular the phase during which the upper box is engaged in uniformly accelerated movement. Two new parameters are also defined, called the angles of static friction and dynamic friction MH - France MH - Mexico|Puebla PB - LONDON: THOMAS TELFORD PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Geological;Geosciences, Multidisciplinary;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1072-6349 UR - ISI:000240164200003 L2 - geosynthetics;inclined plane test;interface;dynamic;friction;liner system;slopes;GEOSYNTHETIC INTERFACES SO - Geosynthetics International 2004 ;11(6):439-454 11012 UI - 4919 AU - Goyarzu F AU - Malin DH AU - Lau FC AU - Taglialatela G AU - Moon WD AU - Jennings R AU - Moy E AU - Moy D AU - Lippold S AU - Shukitt-Hale B AU - Joseph JA AD - Univ Houston Clear Lake City, Houston, TX 77058, USANatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoUniv Texas, Med Branch, Galveston, TX 77555, USATufts Univ, USDA, Human Nutr Res Ctr Aging, Boston, MA 02111, USAMalin, DH, Univ Houston Clear Lake City, Mail Code 237,2700 Bay Area Blvd, Houston, TX 77058 USA TI - Blueberry supplemented diet: Effects on object recognition memory and nuclear factor-kappa B levels in aged rats AB - It has been reported that an antioxidant-rich, blueberry-supplemented rat diet may retard brain aging in the rat. The present study determined whether such supplementation could prevent impaired object recognition memory and elevated levels of the oxidative stress-responsive protein, nuclear factor-kappa B (NF-kappaB) in aged Fischer-344 rats. Twelve aged rats had been fed a 2% blueberry supplemented diet for 4 months prior to testing. Eleven aged rats and twelve young rats had been fed a control diet. The rats were tested for object recognition memory on the visual paired comparison task. With a 1-h delay between training and testing, aged control diet rats performed no better than chance. Young rats and aged blueberry diet rats performed similarly and significantly better than the aged control diet group. Levels of NF-kappaB in five brain regions of the above subjects were determined by western blotting assays. In four regions, aged control diet rats had significantly higher average NF-kappaB levels than young animals on the control diet. In four regions, aged blueberry diet rats had significantly lower levels of NF-kappaB than aged control diet rats. Normalized NF-kappaB levels (averaged across regions and in several individual regions) correlated negatively and significantly with the object memory scores MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences;Nutrition & Dietetics U5 - J;Article AV - English IS - 1028-415X UR - ISI:000222594200002 L2 - antioxidant;blueberries;memory;NF-kappa B;object recognition;oxidative stress;NEURONAL SIGNAL-TRANSDUCTION; OXIDATIVE STRESS; BEHAVIORAL DEFICITS; ALZHEIMERS-DISEASE; TRANSCRIPTION FACTOR; LIPID-PEROXIDATION; BASAL FOREBRAIN; BRAIN; RESTRICTION; SPINACH SO - Nutritional Neuroscience 2004 ;7(2):75-83 11013 UI - 3897 AU - Graham J AU - Gurian P AU - Corella-Barud V AU - vitia-Diaz R AD - Univ Texas, El Paso, TX 79968, USAUniv Autonoma Ciudad, Mexico City, DF, MexicoGraham, J, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Environm Hlth Sci, Div Environm Hlth Engn, 615 N Wolfe St,Room W4108, Baltimore, MD 21205 USA TI - Peri-urbanization and in-home environmental health risks: the side effects of planned and unplanned growth AB - Urbanization is occurring at an explosive rate, and many cities, especially in low-income countries, are struggling to control growth and stop the development of unplanned communities. This research investigates the in-home environmental health risks associated with planned and unplanned growth in peri-urban communities (neighborhoods) of a rapidly growing city in Northern Mexico. Surveys were conducted during home visits to 98 households in a planned community and 202 households in unplanned communities of comparable, though slightly higher, socio-economic status. To assess the differences for the two types of communities, multiple risk factors were measured and compared. Results showed that households in both planned and unplanned communities were vulnerable to poor environmental health conditions, but more risk factors and negative health outcomes were associated with unplanned communities. Some of the obvious benefits of living in a planned community included better-constructed homes and water and sewer connections. Other study results indicated that households in the planned community reported fewer cases of respiratory problems (P = 0.039) and dizziness (P = 0.009). They were also less likely to store insecticides and other chemicals inappropriately in their home (P < 0.001). Providing adequate housing infrastructure appears to provide a number of important benefits to health and behavior beyond the simple provision of additional amenities in the home MH - USA MH - Mexico|Distrito Federal PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 1438-4639 UR - ISI:000225063800006 L2 - urbanization;US-Mexico border;housing;safety;health and exposure SO - International Journal of Hygiene and Environmental Health 2004 ;207(5):447-454 11014 UI - 6438 AU - Graham MF AU - Meaburn J AU - Lopez JA AU - Harman DJ AU - Holloway AJ AD - Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoGraham, MF, Univ Manchester, Dept Phys & Astron, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England TI - The bipolarity of the highest Galactic latitude planetary nebula, LoTr 5 (PN G339.9+88.4), around IN Com AB - High-resolution, spatially resolved, long-slit profiles of the [O III] 5007-Angstrom emission line of the highest Galactic latitude planetary nebula, LoTr 5, have been obtained with the Manchester Echelle Spectrometer (MES-SPM) on the San Pedro Martir (SPM) 2.1-m telescope. These are compared with a deep narrow-band [O III] 5007-Angstrom mosaic image obtained with the same system. This faint nebula, at a distance of greater than or equal to 500 pc from the Galactic plane, is found to be expanding asymmetrically. Some form of bipolar structure is suggested by modelling the position-velocity arrays of line profiles and the new [O III] 5007-Angstrom image. Interestingly, the modelled bipolar axis is nearly perpendicular to the orbital plane of the IN Com binary system; this supports the theories which predict that binary systems play a part in shaping the outflow. Evidence for interaction of the envelope of LoTr 5 with its local interstellar medium is also considered MH - United Kingdom MH - Mexico|Baja California PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000188305300037 L2 - line : profiles;stars : individual : IN Com;ISM : kinematics and dynamics;planetary nebulae : individual : LoTr 5;X-RAY-EMISSION; INTERSTELLAR-MEDIUM; CENTRAL STAR; ECHELLE SPECTROMETER; TRIPLE SYSTEM; KINEMATICS; TELESCOPE; EXPANSION; CATALOG; LT-5 SO - Monthly Notices of the Royal Astronomical Society 2004 ;347(4):1370-1378 11015 UI - 6475 AU - Grajeda-Cota P AU - Ramirez-Mares MV AU - De Mejia EG AD - Univ Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801, USACtr Food Res & Dev, CIAD, Hermosillo, Sonora, Mexicode Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 228 ERML,M-C 1201 W Gregory Dr, Urbana, IL 61801 USA TI - Vitamin C protects against in vitro cytotoxicity of cypermethrin in rat hepatocytes AB - The objective of this study was to investigate the effect of ascorbic acid (AA) on the in vitro cytotoxicity of cypermethrin (CM), and on glutathione (GSH) metabolism in rat hepatocytes. In vitro cell viability, lactate dehydrogenase (LDH), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) leakage were measured, as indicators of hepatic damage, at 1, 15 and 30 min of exposure to CM. Glutathione and the activities of glutathione-S-transferase (GST) and gamma glutamyl transpeptidase (gamma-GT) were also measured. CM hepatotoxicity increased in a time and dose-dependent manner. In the presence of 30 mum CM, ALT and AST also increased 49 and 130% (P < 0.05), respectively, indicating metabolic hepatocyte damage. AA (1 mm) was capable to preserve 100% of cell integrity and modulated ALT and AST. Furthermore, CM induced a 27% reduction in the endogenous antioxidant GSH, and increased 203% GST and 283% gamma-GT (P < 0.05), indicating an,oxidative insult. The presence of AA showed chemopreventive capacity against CM, recovering 60% of GSH and a 54% decrease in gamma-GT activity. These results suggest that AA in a 1:33 (CM:AA) ratio can modulate up to 90% of the damage caused to the cells by CM. It also demonstrates that AA can act as a primary antioxidant and hepatoprotector in rat hepatocytes. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Toxicology U5 - J;Article AV - English IS - 0887-2333 UR - ISI:000188058900002 L2 - vitamin C;cypermethrin;in vitro;hepatocytes;cytotoxicity;OXIDATIVE STRESS; ASCORBIC-ACID; ALPHA-TOCOPHEROL; CANCER; DAMAGE; LIVER; ERYTHROCYTES; ANTIOXIDANT; TRANSFERASE; PESTICIDES SO - Toxicology in Vitro 2004 ;18(1):13-19 11016 UI - 4129 AU - Gratsiansky NA AU - De Conto AA AU - Zuniga MA AU - Enar R AU - Sheikh SA AU - Macarie C AD - Res Inst Physicochem Med, Moscow 119828, RussiaHosp Univ Antonio Pedor UFF, Ioanema Rio De Janeiro, BrazilHosp Servidores Estado HSE, Ioanema Rio De Janeiro, BrazilIMSS, Ctr Med Nacl Occidente, Guasalaraja, MexicoHaseki Univ, Inst Cardiol, Istanbul, TurkeyPunjab Inst Cardiol, Lahore, PakistanProf CC Iliescu Hosp, Inst Cardiovasc Dis, Bucharest, RomaniaGratsiansky, NA, Res Inst Physicochem Med, Ul Malaya Pirogovskaya 1A, Moscow 119828, Russia TI - Enoxaparin for the treatment of unstable angina and non-ST segment elevation myocardial infarction: the ENO-INT study AB - Aim. To assess safety and efficacy of enoxaparin in patients with UA/NSTEMI in an open-label, multi-centre, non-comparative study and to compare the results with data from large-scale randomized trials ESSENCE and TIMI-11B. Methods. Patients hospitalized with a diagnosis of recent UA/NSTEMI were treated with 1 mg/kg enoxaparin every 12 hours for 2-8 days. The composite endpoint of the study was death, myocardial infarction (MI) or recurrent angina at day 15 (or hospital discharge). Minor and major bleedings were recorded. Results. A total of 1902 patients were enrolled in 109 centers across 24 countries, of which 1901 received at least one injection of enoxaparin and 1785 (93.8%) completed the study (follow-up). Throughout the study (day 180) 21.4% of patients underwent at least one revascularization, of which 4.4% were urgent. The incidence of the composite efficacy endpoint was 16.3% after 15 days and 27.9% on day 180, which was comparable with the enoxaparin arm of the ESSENCE/TIMI 11B studies, and lower than the incidence found in the UFH arm of those studies. At day 15 or hospital discharge the occurrence of major and minor haemorrhages was 1.1 and 6.6%, respectively, which was lower than in ESSENCE/TIMI 11B. More bleeding complications (major and minor) were noted in patients aged greater than or equal to75 years (11.2%) versus those of <75 years (7.1%). Independent predictors of 180-day adverse outcome (death, MI, recurrent angina) were: age (OR 1.02, 95% DI: 1.01-1.03), prior aspirin treatment (OR 1.33, 95% DI: 1.15-1.47) and previous PTCA (OR 1.4, 95% DI: 1.11-1.59). Conclusion. These results which are highly consistent with those previously reported from ESSENCE and TIMI 11B trials evidence for safety and effectiveness of enoxaparin in the treatment of UA and NSTEMI MH - Brazil MH - Mexico|Jalisco MH - Pakistan MH - Romania MH - Russia MH - Turkey PB - MOSCOW: IZDATELSTVO MEDITSINA RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - Russian IS - 0022-9040 UR - ISI:000224108700001 L2 - unstable angina;non-ST elevation acute coronary syndrome;enoxaparin;prognosis;UNFRACTIONATED HEPARIN; TIMI 11B; EVENTS SO - Kardiologiya 2004 ;44(6):4-7 11017 UI - 3968 AU - Gray LS AU - Perez-Reyes E AU - Gamorra JC AU - Haverstick DM AU - Shattock M AU - McLatchie L AU - Harper J AU - Brooks G AU - Heady T AU - Macdonald TL AD - Univ Virginia, Dept Pathol, Charlottesville, VA, USAUniv Virginia, Dept Pharmacol, Charlottesville, VA 22908, USAUNAM, Inst Fisiol Celular, Dept Biofis, Mexico City, DF, MexicoUniv London Kings Coll, London WC2R 2LS, EnglandUniv Reading, Reading, Berks, EnglandUniv N Carolina, Dept Chem, Chapel Hill, NC, USAUniv Virginia, Dept Chem, Charlottesville, VA, USAGray, LS, Univ Virginia, Dept Pathol, POB 800214, Charlottesville, VA USA TI - The role of voltage gated T-type Ca2+ channel isoforms in mediating "capacitative" Ca2+ entry in cancer cells AB - The mechanism by which Ca2+ enters electrically non-excitable cells is unclear. The sensitivity of the Ca2+ entry pathway in electrically non-excitable cells to inhibition by extracellular Ni2+ was used to direct the synthesis of a library of simple, novel compounds. These novel compounds inhibit Ca2+ entry into and, consequently, proliferation of several cancer cell lines. They showed stereoselective inhibition of proliferation and Ca2+ influx with identical stereoselective inhibition of heterologously expressed Cav3.2 isoform of T-type Ca2+ channels. Proliferation of human embryonic kidney (HEK)293 cells transfected with the Cav3.2 Ca2+ channel was also blocked. Cancer cell lines sensitive to our compounds express message for the Cav3.2 T-type Ca2+ channel isoform, its delta25B splice variant, or both, while a cell line resistant to our compounds does not. These observations raise the possibility that clinically useful drugs can be designed based upon the ability to block these Ca2+ channels. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 13 U4 - Cell Biology U5 - J;Article AV - English IS - 0143-4160 UR - ISI:000224880000005 L2 - non-excitable cells;HEK293;voltage gated;neoplasms;therapy;calcium channels;T-type;cell division;drug effects;CALCIUM-CHANNEL; ANTIGEN RECEPTOR; LYMPHOCYTE-T; INHIBITION; OVEREXPRESSION; PROLIFERATION; SUBUNIT; CLONING; CRAC SO - Cell Calcium 2004 ;36(6):489-497 11018 UI - 4761 AU - Green EL AU - Marcos EN AU - Martinez-Villa R AU - Zhang P AD - Virginia Tech, Dept Math, Blacksburg, VA 24061, USAUSP, Dept Math, BR-09500900 Sao Paulo, BrazilUNAM, Dept Math, Morelia, Michoacan, MexicoUSTC, Dept Math, Hefei, Peoples R ChinaGreen, EL, Virginia Tech, Dept Math, Blacksburg, VA 24061, USA TI - D-Koszul algebras AB - In this paper we study d-Koszul algebras which were introduced by Berger. We show that when d greater than or equal to 3, these are classified by the Ext-algebra being generated in degrees 0, 1, and 2. We show the Ext-algebra, after regrading, is a Koszul algebra and present the structure of the Ext-algebra. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Michoacan MH - Peoples R China MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-4049 UR - ISI:000223119400009 L2 - PROJECTIVE-RESOLUTIONS SO - Journal of Pure and Applied Algebra 2004 ;193(1-3):141-162 11019 UI - 4050 AU - Grigoryeva O AU - Fainleib A AU - Starostenko O AU - Tolstov A AU - Brostow W AD - Natl Acad Sci Ukraine, Inst Macromol Chem, UA-02160 Kiev, UkraineUniv N Texas, Dept Mat Sci & Engn, Denton, TX 76203, USANatl Autonomous Univ Mexico, CFTA, Queretaro, MexicoBrostow, W, Univ N Texas, Dept Mat Sci, Denton, TX 76203, USA TI - Thermoplastic elastomers from rubber and recycled polyethylene: chemical reactions at interphases for property enhancement AB - Recycled low density polyethylene (R-LDPE) has been reactively compatibilized with butadiene rubber (BR) by using small additions of reactive polyethylene copolymers and reactive BRs to produce thermoplastic elastomers (TPEs). TPEs were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), rheology measurements, wide-angle X-ray scattering (WAXS) and mechanical testing. WAXS results show that the presence of BR and reactive modifiers does not completely prevent the crystallization of R-LDPE during the TPE formation. Depression of the melting point has been found in all cases. Also in all cases, compatibility is provided by formation of interfacial layers. The best mechanical characteristics are obtained for R-LDPE + BR blends compatibilized with poly(ethylene-co-acrylic acid) (PE-co-AA) and polybutadiene terminated with isocyanate groups (PB-NCO) for PB-NCO = 7.5 wt% per PB and COOH/NCO ratio = 1/1. The stress at break and elongation at break are respectively improved by 31% and 63%. The PB-NCO modifier participates in co-vulcanization with BR in the rubber phase and reacts at the interface with the PE-co-AA dissolved in the polyolefin phase. As a result, the amorphous phase of R-LDPE is dissolved by the rubber phase and a morphology with dual phase continuity is formed, assuring an improvement of mechanical properties of TPEs. (C) 2004 Society of Chemical Industry MH - Mexico|Queretaro MH - Ukraine MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 0959-8103 UR - ISI:000224607700015 L2 - recycling;dynamic vulcanization;reactive compatibilization;LDPE;BR;TPE;PLUS WOOD FLOUR; DYNAMIC VULCANIZATION; DENSITY POLYETHYLENE; BLENDS; COMPATIBILIZATION; COPOLYMERS SO - Polymer International 2004 ;53(11):1693-1703 11020 UI - 3521 AU - Grimalsky V AU - Berezhnoy A AU - Kotsarenko A AU - Makarets N AU - Koshevaya S AU - Enriquez RW AD - INAOE, Puebla, MexicoWaseda Univ, Adv Res Inst Sci & Engn, Tokyo, JapanUNAM, Ctr Geociencias, Queretaro, MexicoKyiv Natl Shevchenko Univ, Fac Phys, Kiev, UkraineUAEM, CIICAp, Cuernavaca, Morelos, MexicoGrimalsky, V, INAOE, Puebla, Mexico TI - Interpretation of the microwave non-thermal radiation of the Moon during impact events AB - The results of recent observations of the non-thermal electromagnetic (EM) emission at wavelengths of 2.5 cm, 13 cm, and 21 cm are summarized. After strong impacts of meteorites or spacecrafts (Lunar Prospector) with the Moon's surface, the radio emissions in various frequency ranges were recorded. The most distinctive phenomenon is the appearance of quasi-periodic oscillations with amplitudes of 3- 10 K during several hours. The mechanism concerning the EM emission from a propagating crack within a piezoactive dielectric medium is considered. The impact may cause the global acoustic oscillations of the Moon. These oscillations lead to the crackening of the Moon's surface. The propagation of a crack within a piezoactive medium is accompanied by the excitation of an alternative current source. It is revealed that the source of the EM emission is the effective transient magnetization that appears in the case of a moving crack in piezoelectrics. The moving crack creates additional non-stationary local mechanical stresses around the apex of the crack, which generate the non-stationary electromagnetic field. For the cracks with a length of 0.1-1 mum, the maximum of the EM emission may be in the 1-10GHz range MH - Japan MH - Mexico|Morelos MH - Mexico|Puebla MH - Mexico|Queretaro MH - Ukraine PB - KATLENBURG-LINDAU: EUROPEAN GEOSCIENCES UNION RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 1561-8633 UR - ISI:000225976300021 SO - Natural Hazards and Earth System Sciences 2004 ;4(5-6):793-798 11021 UI - 3910 AU - Grimfeld A AU - Holgate ST AU - Canonica GW AU - Bonini S AU - Borres MP AU - Adam D AU - Gonzalez CC AU - Lobaton P AU - Patel P AU - Szczeklik A AU - Danzig MR AU - Roman I AU - Bismut H AU - Czarlewski W AD - Hop Armand Trousseau, Ctr Asthme, F-75571 Paris 12, FranceUniv Southampton, Sch Med, Southampton, Hants, EnglandUniv Genoa, Genoa, ItalyItalian Natl Res Council, Rome, ItalyUniv Gothenburg, Gothenburg, SwedenUniv Munich, Kinderklin, D-8000 Munich, GermanyUniv Hosp, Monterrey, MexicoUniv Cadiz, Cadiz, SpainAllied Clin, Toronto, ON, CanadaJagellonian Univ, Krakow, PolandSchering Plough Corp, Kenilworth, NJ 07033, USATarget Res Associates, New Providence, NJ, USAStrategik & Numerik, Paris, FranceSchering Plough Corp, Levallois Perret, FranceGrimfeld, A, Hop Armand Trousseau, Ctr Asthme, 26 Ave Dr Arnold Netter, F-75571 Paris 12, France TI - Prophylactic management of children at risk for recurrent upper respiratory infections: the Preventia I Study AB - Background Given the morbidity and mortality of asthma and the recent dramatic increase in its prevalence, pharmacologic prophylaxis of this disease in children at risk would represent a major medical advance. Objectives The Preventia I Study was designed to evaluate the efficacy and long-term safety of loratadine in reducing the number of respiratory infections in children at 24 months. A secondary objective was to investigate the benefit of loratadine treatment in preventing the onset of respiratory exacerbations. Methods Preventia I was a randomized placebo-controlled study involving 22 countries worldwide. The children were 12-30 months of age at enrolment and had experienced at least five episodes of ENT infections, and no more than two episodes of wheezing during the previous 12 months. Phase I was a 12-month double-blind period during which the children were treated with loratadine 5 mg/day (2.5 mg/day for children less than or equal to24 months of age) or placebo. Phase II was a double-blind follow-up period without study medication. Results Of the 412 children enrolled, 342 and 310 completed Phase I and Phase II, respectively. The results showed a significant decrease in the number of infections in the whole population of children. However, no difference was observed between the loratadine and placebo group. When considering secondary end-points, loratadine was shown to reduce the number of respiratory exacerbations during the treatment phase. None of the 204 children who received loratadine discontinued the study because of drug-related events. Loratadine treatment was not more sedative than placebo and was not associated with cardiovascular events. Conclusion The strong decrease in the rate of infections in the children at risk of recurrent infections, while not being influenced by loratadine treatment, should encourage future reflection in terms of prophylactic management. This study also confirms the long-term safety of loratadine and its metabolites in young children MH - Canada MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Nuevo Leon MH - Poland MH - Spain MH - Sweden MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Allergy;Immunology U5 - J;Article AV - English IS - 0954-7894 UR - ISI:000225080300003 L2 - airway hyper-reactivity;asthma;child;ENT infections;ICAM-1;loratadine;prevention;psychomotor development;rhinovirus;wheezing;SYNCYTIAL VIRUS BRONCHIOLITIS; ADHESION MOLECULE-1; EPITHELIAL-CELLS; EARLY-CHILDHOOD; UP-REGULATION; HAY-FEVER; ASTHMA; LORATADINE; ANTIHISTAMINE; EXPRESSION SO - Clinical and Experimental Allergy 2004 ;34(11):1665-1672 11022 UI - 5772 AU - Gromovoy TY AU - Palyanytsya BB AU - Pokrovskiy VA AU - Basiuk EV AU - Basiuk VA AD - Natl Acad Sci Ukraine, Inst Surface Chem, UA-03164 Kiev, UkraineUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, MexicoBasiuk, VA, Natl Acad Sci Ukraine, Inst Surface Chem, Gen Naumova 17, UA-03164 Kiev, Ukraine TI - Interaction of thermally pretreated carbon nanomaterials with water vapor AB - We used temperature-programmed desorption-mass spectrometry to verify whether low-molecular-weight products can form by reacting thermally pretreated single-walled and multi-walled carbon nanotubes (SWNTs and MWNTs, respectively) with water vapor. The reactivity of MWNTs toward water is similar to the reactivity of graphite, whereas acid-oxidized SWNTs behave like polymerized C-60 fullerene. We think the main factors influencing the reactivity are molecular surface curvature and the presence of pyrolyzable defect groups, which create highly strained bonds upon their elimination MH - Mexico|Distrito Federal MH - Ukraine PB - STEVENSON RANCH: AMER SCIENTIFIC PUBLISHERS RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1533-4880 UR - ISI:000220646100008 L2 - carbon nanotubes;single-walled;multi-walled;temperature-programmed desorption-mass spectrometry;POLYMERIZED FULLERITE; SUPERIOR SORBENT; HYDROGEN-STORAGE; NANOTUBES; TEMPERATURE; ADSORPTION; C-60 SO - Journal of Nanoscience and Nanotechnology 2004 ;4(1-2):77-81 11023 UI - 4788 AU - Gronenberg W AU - Lopez-Riquelme GO AD - Univ Arizona, Arizona Res Labs, Div Neurobiol, Tucson, AZ 85721, USAUNAM, Fac Ciencias, Lab Neurofisiol Comparada Invertebrados, Mexico City, DF, MexicoGronenberg, W, Univ Arizona, Arizona Res Labs, Div Neurobiol, 601 Gould Simpson Bldg, Tucson, AZ 85721 USA TI - Multisensory convergence in the mushroom bodies of ants and bees AB - The mushroom bodies, central neuropils in the arthropod brain, are involved in learning and memory and in the control of complex behavior. In most bisects, the mushroom bodies receive direct olfactory input in their calyx region. In Hymenoptera, olfactory input is layered in the calyx. In ants, several layers can be discriminated that correspond to different clusters of glomeruli in the antennal lobes, perhaps corresponding to different classes of odors. Only in Hymenoptera, the mushroom body calyx also receives direct visual input from the optic lobes. In bees, six calycal layers receive input from different classes of visual interneurons, probably representing different parts of the visual field and different visual properties. Taken together, the mushroom bodies receive distinct multisensory information in many segregated input layers MH - USA MH - Mexico|Distrito Federal PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 6 U4 - Biology U5 - J;Article AV - English IS - 0236-5383 UR - ISI:000223046100005 L2 - neuroanatomy;learning;memory;insects;multimodal information;HONEYBEE APIS-MELLIFERA; BRAIN; BODY; INPUT; ORGANIZATION; SEGREGATION; MEMORY; LOBES SO - Acta Biologica Hungarica 2004 ;55(1-4):31-37 11024 UI - 3737 AU - Grossman D AU - Ellertson C AU - Grimes DA AU - Walker D AD - Populat Council, Mexico City 04000, DF, MexicoIbis Reprod Hlth, Cambridge, MA, USAUniv S Carolina, Sch Med, Chapel Hill, NC, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoGrossman, D, Populat Council, Panzacola 62,Int 102,Col Villa Coyoacan, Mexico City 04000, DF, Mexico TI - Routine follow-up visits after first-trimester induced abortion AB - Routine follow-up visits after abortion are intended to confirm that the abortion is complete and to diagnose and treat complications. Many clinicians also take advantage of the follow-up visit to provide general reproductive health care: discussing contraceptive plans and providing family planning services; diagnosing sexually transmitted infections; performing a Pap test or discussing abnormal Pap results. We reviewed the evidence related to the routine postabortion follow-up visit. Other than mifepristone medical abortion performed at 50 days of gestation or later and methotrexate medical abortion, we found little evidence that mandatory follow-up visits typically detect conditions that women themselves could not be taught to recognize. In addition, the natural history of the most severe complications after abortion-infection and unrecognized ectopic pregnancy-have time courses inconsistent with the usual timing of the follow-up visit. Costs associated with this visit can be great. These include travel expenses, lost wages, child-care expenses, privacy and emotional burdens for women, and scheduling disruptions and the related opportunity costs caused by "no-shows" for the provider. Follow-up appointments should be scheduled for those women likely to benefit from a physical examination. For the remainder of women, simple instructions and advice about detecting complications, possibly coupled with telephone follow-up, might suffice. Although arguably valuable in their own right, counseling, family planning services, or sexually transmitted infection diagnosis and treatment should not be so inflexibly bundled with postabortion care. Protocols that require in-person follow-up after abortion may not make the best use of a women's time or abilities, or of the medical system. (C) 2004 by The American College of Obstetricians and Gynecologists MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Obstetrics & Gynecology U5 - J;Editorial Material AV - English IS - 0029-7844 UR - ISI:000225413900021 L2 - DEPOT MEDROXYPROGESTERONE ACETATE; SURGICAL ABORTION; POSTABORTAL CONTRACEPTION; PREGNANCY TERMINATION; THERAPEUTIC-ABORTION; CONTINUATION-RATES; RANDOMIZED TRIAL; UNITED-STATES; INNER-CITY; MISOPROSTOL SO - Obstetrics and Gynecology 2004 ;103(4):738-745 11025 UI - 4283 AU - Grubor B AU - Gallup JM AU - Ramirez-Romero R AU - Bailey TB AU - Crouch EC AU - Brogden KA AU - Ackermann MR AD - Iowa State Univ, Dept Vet Pathol, Coll Vet Med, Ames, IA 50011, USAUnidad Univ Mederos, Monterrey, Nuevo Leon, MexicoIowa State Univ, Coll Liberal Arts & Sci, Ames, IA 50011, USAWashington Univ, Sch Med, Dept Pathol & Immunol, Barnes Jewish Hosp, St Louis, MO 63110, USAUniv Iowa, Coll Dent, Dept Periodont, Iowa City, IA 52252, USAUniv Iowa, Coll Dent, Dow Inst Dent Res, Iowa City, IA 52252, USAGrubor, B, Iowa State Univ, Dept Vet Pathol, Coll Vet Med, Ames, IA 50011 USA TI - Surfactant protein D expression in normal and pneumonic ovine lung AB - Surfactant protein D (SP-D) is a collagenous calcium-dependent lectin constitutively expressed by alveolar type II pneumocytes and non-ciliated bronchiolar epithelial (Clara) cells. It binds to surface glycoconjugates expressed by a wide variety of microorganisms such as Gram-negative bacteria, influenza A virus, and various fungi, leading to pathogen inactivation or enhanced neutrophil and macrophage activity. Since a hallmark of bronchopneumonia is the initiation of inflammation in the bronchi and bronchoalveolar junction, we chose a classic ruminant model of bronchopneumonia caused by Mannheimia haemolytica to study the expression of SP-D within the bronchioles of infected lambs. Healthy weaned lambs were inoculated with either pyrogen-free saline (controls) or M. haemolytica intrabronchially using a fiber-optic bronchoscope. SP-D protein and mRNA expression in lung was detected by immunohistochemistry (IHC) and fluorogenic real-time relative quantitative reverse transcriptase polymerase chain reaction (real-time RT-PCR), respectively, during acute (1 day), subacute (15 days), and chronic (45 days) bronchopneumonia. At 15 and 45 days post-inoculation, areas of lung had peribronchiolar inflammatory cell infiltrate, epithelial cell hyperplasia, tortuosity of the airway lumens, and decreased intensity of SP-D protein staining and number of positive cells. The levels of SP-D mRNA were not increased or significantly altered by M. haemolytica infection when compared to control animals. In conclusion, cell-associated SP-D protein expression significantly decreases within hyperplastic epithelium of lungs from infected animals during chronic bronchopneumonia. Exhaustion of SP-D protein reserves and absence of SP-D gene upregulation during the progression of bacterial pneumonia into chronicity may result in failure to clear the pathogen from the lung and/or cause animals to be more susceptible to re-infection. (C) 2004 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Immunology;Veterinary Sciences U5 - J;Article AV - English IS - 0165-2427 UR - ISI:000224154600011 L2 - immunohistochemistry;innate immunity;pneumonia;real-time RT-PCR;sheep;surfactants;MANNHEIMIA PASTEURELLA HAEMOLYTICA; GRAM-NEGATIVE BACTERIA; IN-VIVO; LIPOPOLYSACCHARIDE; PROGRESSION SO - Veterinary Immunology and Immunopathology 2004 ;101(3-4):235-242 11026 UI - 6549 AU - Grubor B AU - Ramirez-Romero R AU - Gallup JM AU - Bailey TB AU - Ackermann MR AD - Iowa State Univ, Coll Vet Med, Dept Vet Pathol, Ames, IA 50011, USAUniv Autonoma Nuevo Leon, Fac Med Vet & Zootecnia, Nuevo Leon, DF, MexicoIowa State Univ, Coll Liberal Arts & Sci, Ames, IA, USAGrubor, B, Iowa State Univ, Coll Vet Med, Dept Vet Pathol, Ames, IA 50011 USA TI - Distribution of substance P receptor (neurokinin-1 receptor) in normal ovine lung and during the progression of bronchopneumonia in sheep AB - Substance P contributes to the physiological homeostasis of pulmonary airways and vasculature. During pneumonia, alterations in substance P production and receptor expression can influence bronchoconstriction and vascular perfusion. The distribution of substance P receptor [neurokinin-1 receptor (NK-1R)] in lungs of normal sheep and sheep with acute (1 day), subacute (15 days), and chronic (45 days) bronchopneumonia caused by Mannheimia haemolytica was determined by immunohistochemistry (IHC). Three rabbit polyclonal antibodies generated to the same cytosolic C-terminal portion of NK-1R (residues 393-407) were tested. NK-1R immunoreactivity was traced in digital images and quantified with IPLAB software. There were no significant differences in NK-1R protein density between normal and infected lambs. Antibody 1 had the broadest distribution and intensity, and stained alveolar septae, smooth muscle cells of airways and vessels, epithelial cells of airways and alveoli, and submucosal glands. When all animals from the study were included, there was a trend towards decreased NK-1R immunoreactivity over time. The work suggests that (a) the density of NK-1R does not change during progression of bacterial (M. haemolytica) bronchopneumonia, (b) NK-1R is widely distributed in ovine lung and decreases with age, and (c) antibodies to the same NK-1R cytosolic region can vary in speck ficity and affinity MH - USA MH - Mexico|Distrito Federal PB - SEATTLE: HISTOCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 6 U4 - Cell Biology U5 - J;Article AV - English IS - 0022-1554 UR - ISI:000187670600012 L2 - substance P;NK-1 receptor;ovine lung;immunohistochemistry;GENE-RELATED PEPTIDE; IMMUNOREACTIVE NERVE-FIBERS; MAST-CELL DENSITY; RESPIRATORY-TRACT; AIRWAYS; INFLAMMATION; TACHYKININS; CAPSAICIN; LIPOPOLYSACCHARIDE; EXTRAVASATION SO - Journal of Histochemistry & Cytochemistry 2004 ;52(1):123-130 11027 UI - 3756 AU - Grudsky S AU - Karapetyants A AU - Vasilevski N AD - CINVESTAV, IPN, Dept Matemat, Mexico City 07000, DF, MexicoRostov On Don State Univ, Dept Math, Rostov Na Donu, RussiaGrudsky, S, CINVESTAV, IPN, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Dynamics of properties of Toeplitz operators with radial symbols AB - In the case of radial symbols we study the behavior of different properties (boundedness, compactness, spectral properties, etc.) of Toeplitz 14 operators T (A) acting on weighted Bergman spaces A(lambda)(2) (D) over the unit disk D, in dependence on lambda, and compare their limit behavior under lambda-->+infinity with corresponding properties of the initial symbol a MH - Mexico|Distrito Federal MH - Russia PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000225230400006 L2 - toeplitz operator;weighted Bergman spaces;boundedness;compactness;spectra;BERGMAN SPACES SO - Integral Equations and Operator Theory 2004 ;50(2):217-253 11028 UI - 4131 AU - Grudsky S AU - Karapetyants A AU - Vasilevski N AD - IPN, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoRostov Don State Univ, Dept Math, Rostov Na Donu 344711, RussiaGrudsky, S, IPN, CINVESTAV, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Dynamics of properties of Toeplitz operators on the upper half-plane: Parabolic case AB - We consider Toeplitz operators T-a((lambda)) acting on the weighted Bergman spaces A(lambda)(2) (Pi), lambda is an element of [0, infinity), over the upper half-plane Pi, whose symbols depend on y = Im z. Motivated by the Berezin quantization procedure we study the dependence of the properties of such operators on the weight lambda and, particular, under the limit procedure lambda --> infinity MH - Mexico|Distrito Federal MH - Russia PB - BUCHAREST: THETA FOUNDATION RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0379-4024 UR - ISI:000224466500011 L2 - weighted Bergman spaces;Toeplitz operator;boundedness;spectrum;BERGMAN SO - Journal of Operator Theory 2004 ;52(1):185-214 11029 UI - 3145 AU - Gruskova A AU - Papanova M AU - Kevicka D AU - Slama J AU - Jancarik V AU - Lipka J AU - Gonzalez-Anceles A AU - Subrt J AD - Slovak Tech Univ, Fac Elect Engn & Informat Technol, Bratislava 81219, SlovakiaCINVESTAV Saltillo, Saltillo 25900, Coahuila, MexicoAcad Sci Czech Republ, Inst Inorgan Chem, CZ-25068 Rez, Czech RepublicGruskova, A, Slovak Tech Univ, Fac Elect Engn & Informat Technol, Ilkovicova 3, Bratislava 81219, Slovakia TI - Influence of Zn-Zr ions on microstructural and magnetic properties of Ba hexaferrites AB - Magneto crystalline structure and magnetic properties of BaFe12-2xZnxZrxO19 compounds with 0.0 less than or equal to x less than or equal to 0.6 were investigated by Mosbauer spectroscopy, thermornagnetic analysis, vibrating sample magnetometry, and TEM microscopy. The ferrite powders were prepared by ball milling (Mx) and by modified citrate precursor method (Sk), respectively. Relatively large change of the coercivity H-c (from 376 kA/m down to 179 kA/m) with increase of x was obtained for (Sk) samples as a result of preferable 2b and 4f(2) sites occupation by Zn-Zr ions. The temperature coefficient of the coercivity dH(c)/dT approaches the value 0.14 kA/mdegreesC at x = 0.6 for (Mx) samples. Substituted Zn-Zr ions likely occupy also 4f(1) and 12k sites for x greater than or equal to 0.4, which leads to a slight reduction in the specific magnetic polarization. Selected powder samples were treated by milling in an NaCl flux after calcination for achieving fine particles MH - Czech Republic MH - Mexico|Coahuila MH - Slovakia PB - PRAGUE: INST PHYSICS ACAD SCI CZECH REPUBLIC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0011-4626 UR - ISI:000227059000066 L2 - hexagonal ferrite;substituting effect;CO SO - Czechoslovak Journal of Physics 2004 ;54():D671-D674 11030 UI - 4395 AU - Gruskova A AU - Lipka J AU - Papanova M AU - Kevicka D AU - Gonzalez A AU - Mendoza G AU - Toth I AU - Slama J AD - Slovak Univ Technol, Dept Electrotechnol, Fac Elect Engn & Informat Technol, Bratislava 81219, SlovakiaSlovak Univ Technol, Dept Nucl Phys & Technol, Fac Elect Engn & Informat Technol, Bratislava 81219, SlovakiaCinvestav Saltillo, Saltillo 25000, Coahuila, MexicoSlovak Univ Technol, Dept Electromagnet Theory, Fac Elect Engn & Informat Technol, Bratislava 81219, SlovakiaGruskova, A, Slovak Univ Technol, Dept Electrotechnol, Fac Elect Engn & Informat Technol, Ilkovicova 3, Bratislava 81219, Slovakia TI - Mossbauer study of microstructure and magnetic properties (Co, Ni)-Zr substituted Ba ferrite particles AB - The barium hexaferrites of M-type BaFe12-2x(Co,Ni)(x)ZrxO19 were synthesized by citrate precursor method in 0.0less than or equal toxless than or equal to0.6 range. For comparison, Ni-Zr compounds were also prepared by mechanical milling. Mossbauer measurements show that of Zr4+ ions have preference for 2b and 2a+4f(1) sites whereas Co2+ ions prefer 4f(2) and 12k positions. Different occupations were observed on Ni-Zr substitutions. The temperature coefficient of the coercivity, dH(c)/dT, was nearby to zero (0.01 kA/mdegreesC) for the Co-Zr substitutes and positive for the rest of the samples. A fast reduction of coercivity H-c with the increase in substitution level (370 to 150 kA/m) were underwent for all (Co, Ni) -Zr mixtures MH - Mexico|Coahuila MH - Slovakia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical;Physics, Condensed Matter;Physics, Nuclear U5 - J;Article AV - English IS - 0304-3843 UR - ISI:000224130500030 L2 - Mossbauer spectroscopy;hexagonal ferrite;magnetic properties;coercivity;substitution;BARIUM FERRITE; SITE PREFERENCE; CO-TI; HEXAFERRITE SO - Hyperfine Interactions 2004 ;156(1):187-194 11031 UI - 5143 AU - Gudino-Lau J AU - Arteaga MA AU - Munoz LA AU - Parra-Vega V AD - Univ Nacl Autonoma Mexico, Secc Elect, DEPFI, Mexico City 04510, DF, MexicoUniv Autonoma Yucatan, Fac Math, Merida 97199, VenezuelaIPN, Ctr Invest & Estudios Avanzados, Secc Mecatron, Dept Ingn Elect, Mexico City 07360, DF, MexicoGudino-Lau, J, Univ Nacl Autonoma Mexico, Secc Elect, DEPFI, Mexico City 04510, DF, Mexico TI - On the control of cooperative robots without velocity measurements AB - One of the main practical problems on dexterous robots is the complexity of integrating a large amount of sensors within a small robot architecture. In this brief, the control of cooperative robots, without using velocity measurements, is considered. Our main purpose is to analyze the feasibility of avoiding velocity measurements to manipulate an object firmly. Experimental results are shown to support the developed theory MH - Mexico|Distrito Federal MH - Venezuela PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 3 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000222277800012 L2 - linear observers;robust control;FORCE CONTROL; MANIPULATORS SO - Ieee Transactions on Control Systems Technology 2004 ;12(4):600-608 11032 UI - 5988 AU - Guedea J AU - Yee-Madeira H AU - Cabanas JG AU - Reguera E AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaIPN, Sch Math & Phys, Mexico City 07738, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - Mechanically induced instability in Fe2Ti and mechanical alloying of Fe and Ti MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000220250700031 L2 - PHASE; NI SO - Journal of Materials Science 2004 ;39(7):2523-2528 11033 UI - 3517 AU - Guevara J AU - Llois AM AU - guilera-Granja F AU - Montejano-Carrizales JM AD - Univ San Martin, Escuela Ciencia & Tecnol, RA-1563 San Martin, ArgentinaComis Nacl Energia Atom, UA Fis, CAC, RA-1560 San Martin, ArgentinaUBA, FCEN, Dept Fis, Buenos Aires, DF, ArgentinaUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoGuevara, J, Univ San Martin, Escuela Ciencia & Tecnol, Alem 3901, RA-1563 San Martin, Argentina TI - Magnetic properties of bimetallic Ni-Pd nanoclusters AB - We study the dependence of the magnetic properties of Ni-Pd nanoclusters (Ni cores coated by Pd atoms) on size and relative composition. We consider Ni-Pd clusters as having closed shell cubo-octahedral structure with an increasing Ni core size. The electronic and magnetic properties are calculated with a parametrized Hubbard Hamiltonian within the unrestricted Hartree-Fock approximation. We show that, depending on the relative composition, the Pd coating can give rise to an enhancement of the average magnetic moment of the Ni core. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000226101400067 L2 - magentic properties;bimetallic clusters;Ni-Pd clusters SO - Physica B-Condensed Matter 2004 ;354(1-4):300-302 11034 UI - 4090 AU - Guevara J AU - Dilhuydy H AU - Espinosa B AU - Delacourte A AU - Quirion R AU - Mena R AU - Joanette Y AU - Zenteno E AU - Robitaille Y AD - Inst Nacl Neurol & Neurocirurg, Lab Enfermedades Neurodegenerat, Tlalpan 14269, DF, MexicoInst Univ Geriat Montreal, Ctr Rech, Montreal, PQ, CanadaDept Bioquim, Mexico City, DF, MexicoUnite INSERM 422, Lille, FranceMcGill Univ, Douglas Hosp, Res Ctr, Verdun, PQ, CanadaUNAM, Fac Med, Dept Bioquim, Mexico City, DF, MexicoCINVESTAV, Dept Neurociencias, Mexico City 14000, DF, MexicoGuevara, J, Inst Nacl Neurol & Neurocirurg, Lab Enfermedades Neurodegenerat, Insurgentes Sur 3877, Tlalpan 14269, DF, Mexico TI - Coexistence of reactive plasticity and neurodegeneration in Alzheimer diseased brains AB - Alzheimer's. disease (AD) is a pathological process characterized by neuron degeneration and, as recently suggested, brain plasticity, In this work, we compared the reactive plasticity in AD brains associated to O-glycosydically linked glycans, recognized by lectins from Amaranthus leucocarpus (ALL) and Macrobrachium rosenbergii (MRL), and the tau neuritic degeneration. The neuritic degenerative process was evaluated by the quantification of aggregated neuritic structures. Lesions were determined using antibodies against hyperphosphorylated-tau (AD2), amyloid-beta, and synaptophysin. In these conditions, we classified and quantified three pathological structures associated to the neuritic degenerative process: 1) Amyloid-beta deposits (AbetaDs), 2) Classic neuritic plaques (NPs), and 3) Dystrophic neurites clusters (DNCs) lacking amyloid-beta deposits. Reactive plasticity structures were constituted by meganeuritic clusters (MCs) and peri-neuronal sprouting in neurons of the CA4 region of the hippocampus, immunoreactive to synaptophysin (exclusively in AD brains) and GAP-43. Besides, MCs were associated to sialylated O-glycosydically linked glycans as determined by positive labeling with ALL and MRL. Considering that these lectins are specific for the synaptic sprouting process in AD, our results suggest the co-occurrence of of several areas of reactive plasticity and neuron degeneration in AD MH - Canada MH - France MH - Mexico|Distrito Federal PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 4 U4 - Cell Biology;Pathology U5 - J;Article AV - English IS - 0213-3911 UR - ISI:000224639500006 L2 - Alzheimer's disease;amyloid-beta;tau;brain plasticity;ApoE;PAIRED HELICAL FILAMENTS; A4 AMYLOID PROTEIN; NEUROFIBRILLARY TANGLES; SENILE PLAQUES; AMARANTHUS-LEUCOCARPUS; NEURITIC PLAQUES; BETA-A4 DEPOSITS; TAU-PROTEIN; DEMENTIA; LECTIN SO - Histology and Histopathology 2004 ;19(4):1075-1084 11035 UI - 5541 AU - Guevara J AU - Llois AM AU - guilera-Granja F AU - Montejano-Carrizales JM AD - Univ San Martin, Escuela Ciencia & Tecnol, RA-1651 San Martin, ArgentinaCAC, CNEA, Dept Fis, RA-1650 San Martin, ArgentinaUniv Buenos Aires, Dept Fis, FCEyN, RA-1428 Buenos Aires, DF, ArgentinaUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoGuevara, J, Univ San Martin, Escuela Ciencia & Tecnol, Alem 3901, RA-1651 San Martin, Argentina TI - Magnetic trends in Mn-n nanoclusters effects of uniform relaxations on the magnetic properties AB - We have computed minimum energy magnetic structure configurations of Mn nanoclusters ranging from 10 to 55 atoms in size. Spin-polarized electronic properties are calculated by solving an spd tight-binding Hubbard like Hamiltonian in the unrestricted Hartree-Fock approximation by using a bulk-like parametrization. Uniform expansions and contractions are done to follow the dependence of magnetization on interatomic distance. The obtained results allow us to infer that close shell icosahedral structures are competitive with bcc-like ones for N = 13, 19, 32, and 42, whereas for other N values the bcc (with and without central atom) are the ones with lowest electronic energy reproducing the general experimental behaviour. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000221210600009 L2 - magnetic nanostructure;electronic properties;CLUSTERS; TRANSITION; MOMENTS; MANGANESE SO - Physics Letters A 2004 ;325(2):144-148 11036 UI - 5174 AU - Guijosa A AU - Lowe DA AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Mexico City 04510, DF, MexicoBrown Univ, Dept Phys, Providence, RI 02912, USAGuijosa, A, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Dept Fis Altas Energias, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - New twist on the dS/CFT correspondence AB - We stress that the dS/CFT correspondence should be formulated using unitary principal series representations of the de Sitter isometry group or conformal group, rather than highest-weight representations as originally proposed. These representations, however, are infinite dimensional, and so do not account for the finite gravitational entropy of de Sitter space in a natural way. We then propose to replace the classical isometry group by a q-deformed version. This is carried out in detail for two-dimensional de Sitter space and we find that the unitary principal series representations deform to finite-dimensional unitary representations of the quantum group. We believe this provides a promising microscopic framework to account for the Bekenstein-Hawking entropy of de Sitter space MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000222096200102 L2 - SITTER SPACE; HOLOGRAPHY; COSMOLOGY; ENTROPY; UNITY; ROOTS SO - Physical Review D 2004 ;69(10): 11037 UI - 5006 AU - guilar-Aguilar A AU - Pena-Cabrera E AU - Liebeskind LS AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoEmory Univ, Dept Chem, Atlanta, GA 30322, USAPena-Cabrera, E, Univ Guanajuato, Fac Quim, Col Noria Alta S-N, Guanajuato 36050, Mexico TI - Synthesis of squaric acid ester-containing ferrocene derivatives AB - The synthesis of the first three members of the family of the squarylferrocenes is reported. Their preparation involved both the traditional squaric acid chemistry as well as the Liebeskind-Srogl cross-coupling MH - Mexico|Guanajuato MH - USA PB - GAINESVILLE: ARKAT USA INC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English UR - ISI:000222478000015 L2 - ferrocene;squaric acid esters;cyclobutendione;Liebeskind-Srogl cross-coupling;HETEROAROMATIC THIOETHER; QUINONES; ARYL SO - Arkivoc 2004 ;():156-162 11038 UI - 4321 AU - guilar-Santillan J AU - Balmori-Ramirez H AU - Bradt RC AD - Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487, USAUPALM, Inst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 07300, DF, MexicoBalmori-Ramirez, H, Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487 USA TI - Sol-Gel formation and kinetic analysis of the in-situ/self-seeding transformation of bayerite [Al(OH)(3)] to alpha-alumina AB - The sol-gel formation of Bayerite, Al(OH)(3), precipitated from AlO(3)(.)6H(2)O (13.6 g/l) and NH4OH (4N) at a basic pH 9 was studied. The resulting Bayerite was in the form of prisms similar to3 mum in length. The transformation of this Bayerite to alpha-alumina was [Al(OH)(3) ] --> gamma-Al2O3 --> delta-Al2O3 --> theta-Al2O3 --> alpha-Al2O3. The slowest of these transitions, the one which controls the transformation by nucleation and growth kinetics, is the theta-Al2O3 to alpha-Al2O3. This rate-controlling transformation was studied by two different thermal treatments. One was isothermal and the other had two steps, the first of which created "in situ" nuclei, to enhance the transformation rate. The latter treatment reduced the time for the transformation at 1100degreesC from >80 h to only similar to13 h and reduced the activation energy from 419.02 kJ mol(-1) to 317.52 kJ mol. It produced a finer crystal size of alpha-alumina MH - USA MH - Mexico|Distrito Federal PB - SEOUL: KOREAN ASSOC CRYSTAL GROWTH, INC RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1229-9162 UR - ISI:000224108200002 L2 - alumina;sol-gel processing;activation energy;thermal treatments;nucleation;PHASE-TRANSFORMATION; BOEHMITE; THETA; DENSIFICATION; GAMMA-AL2O3; GROWTH SO - Journal of Ceramic Processing Research 2004 ;5(3):196-202 11039 UI - 3936 AU - guilera-Granja F AU - Montejano-Carrizales JM AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, MexicoUniv Valladolid, Dept Fis Teor Atom & Opt, E-47011 Valladolid, SpainAguilera-Granja, F, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, Mexico TI - Magnetism in small Pd clusters AB - We report a theoretical study of the magnetic behavior of selected free-standing Pd-N clusters (N less than or equal to 55) with fcc shapes. Particular attention is devoted here to the fcc structures taking into account recent experimental observations for Pd nanoparticles [Phys. Rev. Lett. 91 (2003) 197201; Phys. Rev. Lett. 91 (2003) 237203]. The optimized geometrical structures were obtained from an uniform relaxation of the cubo-octahedral and the truncated-octahedral configurations using the embedded atom method (EAM). The spin-polarized electronic structure and related magnetic properties of those optimized geometries were calculated by solving self-consistently a spd tight-binding Hamiltonian. We obtain very weak magnetic moments in a qualitative agreement with the early experiments, with those of Sampedro et al. and with most of the theoretical results concerning the negligeable local magnetic moments in low-dimensional Pd systems. We explore the recently observed tendency of certain sites to be more ma--netic than the rest of the cluster. Our results are discussed in the context of several experiments where some controversy still exists regarding the onset of magnetism and its magnitude. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000224926100016 L2 - magnetic nanostructures;transition-metal clusters;electronic properties;tight-binding methods;PALLADIUM CLUSTERS; TRANSITION-METALS; 4D; DEPENDENCE; PARTICLES; SLABS SO - Physics Letters A 2004 ;332(1-2):107-114 11040 UI - 4434 AU - guilera-Granja F AU - Montejano-Carrizales JM AU - Berlanga-Ramirez EO AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, SLP, MexicoUniv Valladolid, Dept Fis Teor Atom & Opt, E-47011 Valladolid, SpainAguilera-Granja, F, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, SLP, Mexico TI - Magnetic behaviour of selected geometries of Pd clusters: icosahedral versus fcc structures AB - We study the magnetic proper-ties of free-standing Pd clusters of some selected sizes with different structures which are obtained as the most stable ones using the embedded atom method from an uniform relaxation of different geometrical configurations. The spin-polarized electronic structure and related magnetic properties of those optimized geometries were calculated by solving self-consistently a spd tight-binding Hamiltonian. The magnetic moments obtained in our calculations present an step-like dependence as a function of the exchange parameter in the case of small cluster size and a more complex dependence for larger cluster sizes. We discuss the results in comparison with previous calculations for fcc Pd clusters and with recent experimental findings. (C) 2004 Published by Elsevier B.V MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000223803800018 L2 - magnetic nanostructures;transition-metal clusters;electronic properties;tight-binding methods;PALLADIUM CLUSTERS; TRANSITION-METALS; 4D; SLABS; RH; DEPENDENCE; THICKNESS; ELEMENTS SO - Physics Letters A 2004 ;330(1-2):126-130 11041 UI - 6187 AU - guilera-Navarro VC AU - Fortes M AU - de Llano M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUNICENTRO, Dept Fis, BR-85015 Guarapuava, PR, BrazilUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoFortes, M, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Stable and resonant Cooper pairs AB - A Bethe-Salpeter treatment of Cooper pairs (CPs) based on an ideal Fermi gas (IFG) `sea' yields the familiar stable negative-energy, infinite-lifetime two-particle bound-state if two-hole CPs are ignored. Otherwise, it gives purely imaginary energies and thus unphysical solutions. However, a Bogoliubov transformation to the BCS ground state yields the trivial sound solution plus a nontrivial one. The latter are two-fermion `moving CPs' as positive-energy stable objects for zero center-of-mass momentum (CMM), and finite-lifetime resonant ones for nonzero CMM with a linear dispersion leading term. Hence, Bose-Einstein condensation of such pairs may occur in exactly two dimensions as it cannot with quadratic dispersion. (C) 2003 Elsevier Ltd. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000188928100007 L2 - Bose-Einstein condensation;particle-hole symmetry;Bethe-Salpeter equation;ATTRACTIVE FERMI GAS; ORGANIC SUPERCONDUCTORS; DISPERSION-RELATION; FLUX-QUANTIZATION; EXCITATIONS; CROSSOVER; ELECTRONS; ENERGY SO - Solid State Communications 2004 ;129(9):577-581 11042 UI - 5276 AU - Guinto G AU - Felix I AU - Arechiga N AU - Arteaga V AU - Kovacs K AD - Hosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Dept Neurosurg, Mexico City, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Dept Neuropathol, Mexico City, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Dept Neurol, Mexico City, DF, MexicoSt Michaels Hosp, Dept Pathol, Toronto, ON M5B 1W8, CanadaGuinto, G, Perifer Sur 3697,Consultorio 1025,Colonia Heroes, Mexico City 10700, DF, Mexico TI - Primary central nervous system lymphomas in immunocompetent patients AB - Primary Central nervous system lymphoma is a rare non-Hodgkin's tumor of the brain that has been traditionally found in patients with immunodeficiency syndromes. However, there are several immunocompetent patients that have also been reported with this neoplasm. In this group of patients, the mean age of diagnosis is around 60-year old, with a very slight predominance in women. Macroscopically, most of the tumors are unique and mainly located in the supratentorial region in the proximity of the cerebrospinal fluid circulation. The typical histological pattern is a perivascular distribution of tumor cells, within a network of reticulin fibers. Even though they are usually well defined masses, it is not rare to find tumor invasion beyond the macroscopic margin. Coagulative necrosis is not as common as in immunodeficiency-related cases. Immunohistochemistry has demonstrated that most of the tumor cells are B-lymphocytes and the electron microscopic findings do not differ from those reported in systemic non-Hodgkin's lymphomas. There are several histological classifications of these tumors, some of them with recent modifications to facilitate the analysis, but unfortunately, up now with a little or no clinical significance. The diagnosis is based on the histological study of the specimen obtained mainly through a Stereotactic biopsy. The treatment is based on a combination of chemotherapy followed by radiotherapy, but the mortality rate is still high MH - Canada MH - Mexico|Distrito Federal PB - MURCIA: F HERNANDEZ RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology;Pathology U5 - J;Review AV - English IS - 0213-3911 UR - ISI:000222112300033 L2 - brain tumor;central nervous system;immunohistochemistry;Non-Hodgkin's lymphoma;PRIMARY CNS LYMPHOMA; PRIMARY CEREBRAL LYMPHOMA; INTRACEREBRAL MALIGNANT-LYMPHOMA; PRIMARY BRAIN LYMPHOMAS; EPSTEIN-BARR-VIRUS; RADIATION-THERAPY; SURVIVAL; CLASSIFICATION; CHEMOTHERAPY; EXPRESSION SO - Histology and Histopathology 2004 ;19(3):963-972 11043 UI - 5725 AU - guirre-Cruz L AU - Mokhtari K AU - Hoang-Xuan K AU - Marie Y AU - Criniere E AU - Taillibert S AU - Lopes M AU - Delattre JY AU - Sanson M AD - Grp Hosp Pitie Salpetriere, INSERM, U495, Lab Biol Interact Neurones Glie, F-75634 Paris, FranceGrp Hosp Pitie Salpetriere, Lab Neuropathol R Escourolle, F-75634 Paris, FranceGrp Hosp Pitie Salpetriere, Federat Neurol Mazarin, F-75634 Paris, FranceGrp Hosp Pitie Salpetriere, Serv Neurochirurg, F-75634 Paris, FranceUniv Paris 06, Paris, FranceInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoSanson, M, Hop La Pitie Salpetriere, Federat Neurol Mazarin, 47 Bd Hop, F-75013 Paris, France TI - Analysis of the bHLH transcription factors Olig1 and Olig2 in brain tumors AB - In the absence of specific markers, the histological diagnosis of oligodendroglial tumors is based on subjective qualitative criteria and remains controversial. Recently, two bHLH transcription factors involved in oligodendroglial specification, Olig1 and Olig2 have been proposed as potential markers of oligodendrogliomas. Expression of Olig1/2 was analyzed by in situ hybridization on 78 samples including 47 glial, 29 non-glial tumors, and two non-tumoral brain tissues. Both genes had a similar pattern of expression. Olig1 and Olig2 were expressed in 26/30 (87%) and 28/30 (93%) of oligodendroglial tumors respectively but in only 9% of glioblastomas (1/11). Olig genes were also expressed in the low-grade fibrillary astrocytomas (4/4) and anaplastic astrocytomas (2/2). No expression was found in non-glial tumors, except for one primary cerebral lymphoma. Double staining with PLP, NFH, GFAP showed that olig genes were expressed by mature, non-tumoral oligodendrocytes, but not by normal astrocytes or neurones. This study indicates that Olig1/2 expression clearly distinguishes pure Olig-negative glioblastomas from a wide spectrum of Olig-positive tumors including traditional oligodendrogliomas and oligoastrocytomas, glioblastomas with an oligodendroglial component (GBMO), and WHO grade 2 and 3 astrocytomas. Because Olig genes have a crucial role in oligodendroglial determination, our data could be of help in defining the real spectrum of oligodendroglial tumors MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 11 U4 - Oncology;Clinical Neurology U5 - J;Article AV - English IS - 0167-594X UR - ISI:000220869800002 L2 - bHLH;gliomas;Olig1;Olig2;oligodendrogliomas;MOLECULAR MARKERS; NERVOUS-SYSTEM; OLIGODENDROGLIOMAS; CLASSIFICATION; EXPRESSION; PROTEINS; GLIOMAS SO - Journal of Neuro-Oncology 2004 ;67(3):265-271 11044 UI - 4268 AU - guirre-Hernandez E AU - Gaxiola-Castro G AU - Najera-Martinez S AU - Baumgartner T AU - Kahru M AU - Mitchell BG AD - Ctr Invest Cientifica & Educ Super Ensenada, Div Oceanol, Dept Oceanog Biol, Ensenada, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA, USAGaxiola-Castro, G, Ctr Invest Cientifica & Educ Super Ensenada, Div Oceanol, Dept Oceanog Biol, Kilometro 107 Carretera Tijuana Ensenada, Ensenada, Baja California, Mexico TI - Phytoplankton absorption, photosynthetic parameters, and primary production off Baja California: summer and autumn 1998 AB - To estimate ocean primary production at large space and time scales, it is necessary to use models combined with ocean-color satellite data. Detailed estimates of primary production are typically done at only a few representative stations. To get survey-scale estimates of primary production, one must introduce routinely measured Chlorophyll-a (Chl-a) into models. For best precision, models should be based on accurate parameterizations developed from optical and photosynthesis data collected in the region of interest. To develop regional model parameterizations C-14- bicarbonate was used to estimate in situ primary production and photosynthetic parameters (alpha*, P-m*, and E-k) derived from photosynthesis-irradiance (P-E) experiments from IMECOCAL cruises to the southern California Current during July and October 1998. The P-E experiments were done for samples collected from the 50% surface light depth for which we also determined particle and phytoplankton absorption coefficients (a(p), a(phi), and a(phi)*). Physical data collected during both surveys indicated that the 1997-1998 El Ni (n) over tildeo was abating during the summer of 1998, with a subsequent transition to the typical California Current circulation and coastal upwelling conditions. Phytoplankton chl-a and in situ primary production were elevated at coastal stations for both surveys, with the highest values during summer. Phytoplankton specific absorption coefficients in the blue peak (a(phi)*(440)) ranged from 0.02 to 0.11 m(2) (mg Chl-a)(-1) with largest values in offshore surface waters. In general a(phi)*5 was lower at depth compared to the surface. P-E samples were collected at the 50% light level that was usually in the surface mixed layer. Using alpha* and spectral absorption, we estimated maximum photosynthetic quantum yields (phi(max); mol C/mol quanta). phi(max) values were lowest in offshore surface waters, with a total range of 0.01-0.07. Mean values of phi(max) for July and October were 0.011 and 0.022, respectively. In July P-m* was approximately double and alpha* was about 1.4 times the values for October. Since the P-E samples were generally within the upper mixed layer, these tendencies in the photosynthetic parameters are attributed to deeper mixing of this layer during October when the mean mixed layer for the photosynthesis stations was 35m compared to a mean of 10m in July. Application of a semi-analytical model using mean values of P-E parameters determined at the 50% light depth provided good agreement with C-14 in situ estimates at the discrete 50% light depth and for the water-column integrated primary production. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700021 L2 - CHLOROPHYLL-A CONCENTRATION; OCEANIC PRIMARY PRODUCTION; LIGHT-ABSORPTION; QUANTUM YIELD; EL-NINO; DUNALIELLA-TERTIOLECTA; SOUTHERN REGION; COASTAL WATERS; FLUORESCENCE; VARIABILITY SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):799-816 11045 UI - 3733 AU - guirre-Tostado FS AU - Herrera-Gomez A AU - Woicik JC AU - Droopad R AU - Yu Z AU - Schlom DG AU - Zschack P AU - Karapetrova E AU - Pianetta P AU - Hellberg CS AD - CINVESTAV Queretaro, Queretaro 76230, MexicoNatl Inst Stand & Technol, Div Ceram, Gaithersburg, MD 20899, USAMotorola Labs, Microelect & Phys Sci Labs, Tempe, AZ 85284, USAPenn State Univ, University Pk, PA 16802, USAUniv Illinois, Argonne Natl Lab, APS UNICAT, Argonne, IL 60439, USAStanford Synchrotron Radiat Lab, Stanford, CA 94309, USAUSN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375, USAAguirre-Tostado, FS, CINVESTAV Queretaro, Libramiento Norponiente 2000,Real Juriquilla, Queretaro 76230, Mexico TI - Elastic anomaly for SrTiO3 thin films grown on Si(001) AB - X-ray diffraction measurements have revealed a negative Poisson's ratio for SrTiO3 thin films grown on Si(001). X-ray absorption fine-structure measurements demonstrate that this elastic anomaly is driven by the interfacial polarization of the SrTiO3 layers. First-principles density-functional calculations support these conclusions. It is suggested that this phenomenon may be common for heteroepitaxial growth of materials that possess an ionic polarizability MH - Mexico|Queretaro MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000225478600019 L2 - SILICON; TITANATE; PHASE SO - Physical Review B 2004 ;70(20): 11046 UI - 4636 AU - guirre-Tostado FS AU - Herrera-Gomez A AU - Woicik JC AU - Droopad R AU - Yu Z AU - Schlom DG AU - Karapetrova J AU - Zschack P AU - Pianetta P AD - CINVESTAV, Queretaro 76001, MexicoNatl Inst Stand & Technol, Gaithersburg, MD 20899, USAMotorola Inc, Phys Sci Res Labs, Tempe, AZ 85284, USAPenn State Univ, University Pk, PA 16802, USAUniv Illinois, Argonne Natl Lab, APS, UNICAT, Argonne, IL 60439, USAStanford Synchrotron Radiat Lab, Stanford, CA 94309, USAAguirre-Tostado, FS, CINVESTAV, Apartado Postal 1-798, Queretaro 76001, Mexico TI - Displacive phase transition in SrTiO3 thin films grown on Si(001) AB - Polarization dependent near and extended x-ray absorption fine-structure (XANES and EXAFS), in combination with x-ray diffraction, has been used to study the structure of SrTiO3 (STO) ultra thin films grown on Si(001). For the in-plane direction (200), the x-ray diffraction data indicate that all films (from 40 to 200 Angstrom) are equally expanded. This is in contradiction to previous reports claiming that the growth is pseudomorphic and epitaxial (coherent), which would predict an inplane contraction. Even the thinnest films (40 A) grow in a relaxed mode (not coherent) at the deposition temperature (700 degreesC). As the system is brought to room temperature, the films (now anchored to the substrate) are not allowed to compress as much as bulk STO. The residual film expansion is quantitatively explained by the differential thermal expansion of Si and STO. For the out-of-plane direction (002), the x-ray diffraction data indicate that STO films are expanded for the thinnest films, and relaxed for a thickness of 200 Angstrom. The in-plane and out-of-plane EXAFS and XANES data show that the perpendicular expansion of the thinner films is accompanied by a displacive phase transition of SrTiO3 where the Ti atom moves toward the (002) direction. This ferroelectric-type behavior of the thinner films implies important potential applications in electronics. (C) 2004 American Vacuum Society MH - Mexico|Queretaro MH - USA PB - MELVILLE: A V S AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000223322000045 L2 - ABSORPTION-SPECTRA; FINE-STRUCTURE; X-RAY; FERROELECTRICITY; SILICON; BATIO3 SO - Journal of Vacuum Science & Technology A 2004 ;22(4):1356-1360 11047 UI - 3515 AU - gullera-Granja F AU - Montejano-Carrizales JM AU - Berlanga-Ramirez EO AU - Vega A AD - Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, MexicoUniv Valladolid, Dept Fis Teor Atom Nucl & Opt, E-47011 Valladolid, SpainAgullera-Granja, F, Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, Alvaro Obregon 64, San Luis Potosi 78000, Mexico TI - Magnetic behavior of Pd nanoclusters AB - We study the magnetic properties of free-standing Pd clusters of some selected sizes with icosahedral structures which are obtained as the most stable ones using the Embedded Atom Method from an uniform relaxation of different geometrical configurations. The spin-polarized electronic structure and related magnetic properties of those optimized geometries were calculated by solving self-consistently a spd tight-binding Hamiltonian. The magnetic moments obtained in our calculations present a step-like dependence as a function of the exchange parameter in the case of small cluster sizes and a more complex dependence for larger cluster sizes is found. We discuss the results in comparison with previous calculations for FCC Pd clusters and with recent experimental findings. We also study the dependence of the magnetic moments distribution within the clusters with some geometrical effects such as hydrostatic deformations and twining. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000226101400060 L2 - magnetic nanostructures;transition-metal clusters;electronic properties;tight-binding methods;PALLADIUM CLUSTERS; TRANSITION-METALS; 4D; SLABS SO - Physica B-Condensed Matter 2004 ;354(1-4):271-277 11048 UI - 3938 AU - Gumen L AU - Feldman E AU - Yurchenko V AU - Krokhin A AD - Univ N Texas, Dept Phys, Denton, TX 76203, USAUniv Popular Autonoma Estado Puebla, Puebla, MexicoDonetsk Engn Phys Inst, UA-83114 Donetsk, UkraineUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoKrokhin, A, Univ N Texas, Dept Phys, POB 311427, Denton, TX 76203, USA TI - Screw misfit dislocations in soft substrates of epitaxial heterostructures AB - We derive compact analytical formulae for the elastic field induced by an anti-plane mismatch deformation in a heterostructure with different elastic moduli of the constituents. Unlike previous studies, we consider the possibility that the misfit dislocations may appear in the substrate, not in the epilayer. We show that this situation can be realized in heterostructures where the substrate is softer than the epilayer. In order to avoid cumbersome calculations, we consider screw misfit dislocations. The misfit dislocations emerge with zero density away from the interface in the body of the substrate when the epilayer reaches its critical thickness. Thus the epilayer remains free from dislocations if it is grown on a softer substrate. This property, which was recently observed experimentally, may find numerous applications in electronics, where epilayers are widely used as active elements MH - Mexico|Puebla MH - Ukraine MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Mechanics;Metallurgy & Metallurgical Engineering;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1478-6435 UR - ISI:000224960800003 L2 - SEMICONDUCTOR HETEROSTRUCTURES; ENERGY; LAYERS; STRAIN; ARRAY SO - Philosophical Magazine 2004 ;84(32):3427-3438 11049 UI - 6140 AU - Gupta AK AU - Gonzalez-Farias G AU - Dominguez-Molina JA AD - Bowling Green State Univ, Dept Math & Stat, Bowling Green, OH 43403, USACtr Invest & Matemat, Mexico City, DF, MexicoUniv Guanajuato, Guanajuato, MexicoGupta, AK, Bowling Green State Univ, Dept Math & Stat, Bowling Green, OH 43403 USA TI - A multivariate skew normal distribution AB - In this paper, we define a new class of multivariate skew-normal distributions. Its properties are studied. In particular we derive its density, moment generating function, the first two moments and marginal and conditional distributions. We illustrate the contours of a bivariate density as well as conditional expectations. We also give an extension to construct a general multivariate skew normal distribution. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0047-259X UR - ISI:000189211000009 L2 - non-normal models;density;marginal;conditional;regression;moments;moment generating function;contours SO - Journal of Multivariate Analysis 2004 ;89(1):181-190 11050 UI - 5501 AU - Gurevich Y AU - Logvinov G AU - Lashkevich I AD - Inst Politecn Nacl, SEPI, ESIME, Culhuacan 04430, DF, MexicoInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoTernopil State Pedag Univ, Dept Math & Phys, UA-46027 Ternopol, UkraineLogvinov, G, Inst Politecn Nacl, SEPI, ESIME, Av Santa Ana 1000, Culhuacan 04430, DF, Mexico TI - Effective thermal conductivity: application to photothermal experiments for the case of bulk light absorption AB - We suggest a new theoretical approach to obtain effective thermal parameters of two-layer structures in photothermal experiments, and calculate the effective thermal conductivity in the quasistatic approximation. Unlike previous works devoted to this problem, it is supposed that a non-equilibrium temperature originates due to the bulk modulated light absorption. It is shown that in this case the effective thermal parameters have to be obtained together with the effective optical parameters. As a result, the effective thermal parameters in the general case are dependent on the optical parameters of the layers. The role of the thermal properties of the interface between the layers is discussed. It is concluded that the effective parameters are not single-valued. They depend on the manner of measurements and the point of these measurements. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Mexico|Distrito Federal MH - Ukraine PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000221420500021 L2 - 2-LAYER STRUCTURES; HEAT; DIFFUSION; TRANSPORT; SOLIDS; WAVES SO - Physica Status Solidi B-Basic Research 2004 ;241(6):1286-1298 11051 UI - 2500 AU - Gurin VS AU - Petranovskii VP AD - Belarussian State Univ, Physicochem Res Inst, Minsk 220080, Byelarus. UNAM, CCMC, Ensenada 22800, Baja California, Mexico TI - Copper clusters in zeolites AB - Copper incorporated into zeolites by the ion-exchange from CLI(II) solutions followed by different heat treatments results in a production of a number of species. Redistribution among different sites after dehydration.. spontaneous and forced reduction, cluster and particle aggregation, etc. can occur, and a final copper state depends on type of zeolite, SiO2/Al2O3 molar ratio and processing conditions. It covers various S species of the ionic nature, small particles and Clusters. We concentrate on the appearance of small copper Clusters feasible in zeolites with size of cavities those match the cluster size. The clusters were simulated with ab initio quantum chemical calculations in the range of 5 < n < 10. Experimental data available on optical absorption of the reduced copper in the three types of zeolites can argue on the occurrence of the Clusters stabilized within channels under mild reduction conditions while the larger copper nanoparticles appear under the harder reduction. The model calculation proposes some few-atornic copper Clusters (Cu-n.) as the candidates to fit the zeolite cavities with correspondence of the calculated absorption bands with the experimental spectra MH - Byelarus MH - Mexico|Baja California T3 - RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALSStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticlegurin@bsu.by0SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALPart A-CBBR47 AV - English IS - 0167-2991 UR - ISI:000227357201070 L2 - copper clusters;mordenite;zeolite beta;ZSM-5;SiO2/Al2O3 molar ratio SO - 2004 ;():1661-1669 11052 UI - 3966 AU - Gutierrez-Hijar DPD AU - Becerra F AU - Puig JE AU - Soltero-Martinez JFA AU - Sierra MB AU - Schulz PC AD - Univ Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Guadalajara, CUCEI, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoSchulz, PC, Univ Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - Properties of two polymerizable surfactants aqueous solutions: dodecylethylmethacrylatedimethylammonium bromide and hexadecylethylmethacrylatedimethylammonium bromide. I. Critical micelle concentration AB - The aggregation of two polymerisable surfactants dodecylethylmethacrylatedimethylammonium bromide (C12PS) and hexadecylethylmethacrylatedimethylammonium bromide (C16PS) was studied with a battery of methods. Both surfactants form premicelles at low concentration, and show a critical micelle concentration and a transition between spherical and rod-like micelles. The micelle ionization degree and the adsorption at the air/solution interface were also studied. Results are interpreted on the basis of the conformation of the polar head group MH - Argentina MH - Mexico|Jalisco PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000225046800010 L2 - alkylethylmethacrylatedimethylammonium bromides;critical micelle concentration;polymerizable surfactants;adsorption;micelle ionization degree;LIQUID-CRYSTALLINE PHASES; AIR-WATER-INTERFACE; NEUTRON REFLECTION; DECANE PHOSPHONATE; ALLYLDIMETHYLDODECYLAMMONIUM BROMIDE; AIR/WATER INTERFACE; AGGREGATION NUMBER; SELF-ORGANIZATION; BEHAVIOR; AMPHIPHILES SO - Colloid and Polymer Science 2004 ;283(1):74-83 11053 UI - 3967 AU - Gutierrez-Hijar DPD AU - Becerra F AU - Puig JE AU - Soltero-Martinez JFA AU - Sierra MB AU - Schulz PC AD - Univ Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Guadalajara, CUCEI, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoSchulz, PC, Univ Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - Properties of two polymerisable surfactants aqueous solutions: dodecylethylmethacrylatedimethylammonium bromide and hexadecylethylmethacrylatedimethylammonium bromide. II. Partial molar volume and micelle hydration AB - The partial molar volume and hydration number of two micellised polymerisable surfactants (dodecylethylmethacrylatedimethylammonium bromide (C12PS) and hexadecylethylmethacrylatedimethylammonium bromide (C16PS)) were determined. Results support marginally the annular conformation of the polar head group (N+(CH3)(2)-CH2-CH2-O-CO-C(CH3)(=CH2)) proposed in the literature MH - Argentina MH - Mexico|Jalisco PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Polymer Science U5 - J;Article AV - English IS - 0303-402X UR - ISI:000225046800011 L2 - alkylethylmethacrylatedimethylammonium bromides;partial molar volume;micelle hydration;density;viscosity;polymerisable surfactants;DODECYLTRIMETHYLAMMONIUM HYDROXIDE; WATER; ELECTROLYTES; PARTICLES; BEHAVIOR; SIZE; SOAP SO - Colloid and Polymer Science 2004 ;283(1):84-90 11054 UI - 5495 AU - Gutierrez-Nava MDL AU - Gillmor CS AU - Jimenez LF AU - Guevara-Garcia A AU - Leon P AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, MexicoCarnegie Inst Washington, Dept Plant Biol, Stanford, CA 94305, USAStanford Univ, Dept Biol Sci, Stanford, CA 94305, USANatl Autonomous Univ Mexico, Fac Ciencias, Lab Microscopia Elect, Mexico City 04510, DF, MexicoLeon, P, Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62271, Morelos, Mexico TI - Chloroplast biogenesis genes act cell and noncell autonomously in early chloroplast development AB - In order to identify nuclear genes required for early chloroplast development, a collection of photosynthetic pigment mutants of Arabidopsis was assembled and screened for lines with extremely low levels of chlorophyll. Nine chloroplast biogenesis (clb) mutants that affect proplastid growth and thylakoid membrane formation and result in an albino seedling phenotype were identified. These mutations identify six new genes as well as a novel allele of cla1. clb mutants have less than 2% of wild-type chlorophyll levels, and little or no expression of nuclear and plastid-encoded genes required for chloroplast development and function. In all but one mutant, proplastids do not differentiate enough to form elongated stroma thylakoid membranes. Analysis of mutants during embryogenesis allows differentiation between CLB genes that act non cell autonomously, where partial maternal complementation of chloroplast development is observed in embryos, and those that act cell autonomously, where complementation during embryogenesis is not observed. Molecular characterization of the noncell autonomous clb4 mutant established that the CLB4 gene encodes for hydroxy-2-methyl-2-(E)-butenyl 4-diphosphate synthase (HDS), the next to the last enzyme of the methylerythritol 4-phosphate (MEP) pathway for the synthesis of plastidic isoprenoids. The noncell autonomous nature of the clb4 mutant suggests that products of the MEP pathway can travel between tissues, and provides in vivo evidence that some movement of MEP intermediates exists from the cytoplasm to the plastid. The isolation and characterization of clb mutants represents the first systematic study of genes required for early chloroplast development in Arabidopsis MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 16 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000221420800047 L2 - DNA COPY NUMBER; ISOPRENOID BIOSYNTHESIS; ARABIDOPSIS-THALIANA; CHLOROPHYLL BIOSYNTHESIS; PLASTID DIFFERENTIATION; NONMEVALONATE PATHWAY; 5-PHOSPHATE SYNTHASE; THYLAKOID MEMBRANE; MOLECULAR ANALYSIS; MESSENGER-RNAS SO - Plant Physiology 2004 ;135(1):471-482 11055 UI - 5401 AU - Gutierrez-Pena E AU - Muliere P AD - Univ Nacl Autonoma Mexico, IIMAS, Mexico City 01000, DF, MexicoBocconi Univ, Milan, ItalyGutierrez-Pena, E, Univ Nacl Autonoma Mexico, IIMAS, Apartado Postal 20-726, Mexico City 01000, DF, Mexico TI - Conjugate priors represent strong pre-experimental assumptions AB - It is well known that Jeffreys' prior is asymptotically least favorable under the entropy risk, i.e. it asymptotically maximizes the mutual information between the sample and the parameter. However, in this paper we show that the prior that minimizes (subject to certain constraints) the mutual information between the sample and the parameter is natural conjugate when the model belongs to a natural exponential family. A conjugate prior can thus be regarded as maximally informative in the sense that it minimizes the weight of the observations on inferences about the parameter; in other words, the expected relative entropy between prior and posterior is minimized when a conjugate prior is used MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0303-6898 UR - ISI:000221535300010 L2 - Bayes risk;conjugate prior;exponential family;mutual information;rate-distortion function;MUTUAL INFORMATION PRINCIPLE; QUADRATIC VARIANCE FUNCTIONS; RATE-DISTORTION FUNCTIONS; EXPONENTIAL-FAMILIES; ENTROPY RISK; COMPUTATION; LIKELIHOOD; CAPACITY SO - Scandinavian Journal of Statistics 2004 ;31(2):235-246 11056 UI - 5845 AU - Gutierrez JAR AU - Moreno P AU - Naredo JL AU - Bermudez JL AU - Paolone A AU - Nucci CA AU - Rachidi F AD - Univ Guadalajara, Dept Math, Guadalajara 44420, Jalisco, MexicoCINVESTAV, Unidad Guadaljara, Guadalajara 45090, Jalisco, MexicoSwiss Fed Inst Technol, CH-1015 Lausanne, SwitzerlandUniv Bologna, I-40136 Bologna, ItalyGutierrez, JAR, Univ Guadalajara, Dept Math, Guadalajara 44420, Jalisco, Mexico TI - Nonuniform transmission tower model for lightning transient studies AB - This paper presents a new approach to model a transmission tower for lightning performance studies. It consists of representing each part of the tower by equivalent vertical and/or horizontal transmission lines as required. While horizontal line parameters are obtained from standard line formulas, specific expressions are derived for the parameters of vertical lines. Moreover, mutual coupling between any two parallel vertical transmission lines is taken into account. Transient waveforms obtained using the proposed method are compared with experimental data obtained using a reduced-scale model and field experiments. The agreement between simulated results and experimental measurements is satisfactory MH - Italy MH - Mexico|Jalisco MH - Switzerland PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000220554400006 L2 - vertical transmission lines;nonuniform transmission lines;transmission tower modeling;transient analysis;mutual impedance;reduced-scale model (RSM);SURGE RESPONSE; IMPEDANCE; TIME SO - Ieee Transactions on Power Delivery 2004 ;19(2):490-496 11057 UI - 5182 AU - Gutierrez JP AU - Johns B AU - Adam T AU - Bertozzi SM AU - Edejer TTT AU - Greener R AU - Hankins C AU - Evans DB AD - WHO, Hlth Syst Financing Expenditure & Resource Alloca, CH-1211 Geneva 27, SwitzerlandNatl Inst Publ Hlth, Div Hlth Econ & Policy, Cuernavaca, Morelos, MexicoCtr Res & Educ Econ CIDE, Mexico City, DF, MexicoUNAIDS, Strateg Informat Social Mobilisat & Informat, Geneva, SwitzerlandJohns, B, WHO, Hlth Syst Financing Expenditure & Resource Alloca, CH-1211 Geneva 27, Switzerland TI - Achieving the WHO/UNAIDS antiretroviral treatment 3 by 5 goal: what will it cost? AB - The "3 by 5" goal to have 3 million people in low and middle income countries on antiretroviral therapy (ART) by the end of 2005 is ambitious. Estimates of the necessary resources are needed to facilitate resource mobilisation and rapid channelling of funds to where they are required. We estimated the financial costs needed to implement treatment protocols, by use of country-specific estimates for 34 countries that account for 90% of the need for ART in resource-poor settings. We first estimated the number of people needing ART and supporting programmes for each country. We then estimated the cost per patient for each programme by country to derive total costs. We estimate that between US$5.1 billion and US$5.9 billion will be needed by the end of 2005 to provide ART, support programmes, and cover country-level administrative and logistic costs for 3 by 5 MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Switzerland PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 15 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000222392900032 SO - Lancet 2004 ;364(9428):63-64 11058 UI - 4022 AU - Gutierrez ME AU - Roubicek DA AU - Sordo M AU - Cebrian ME AU - DeVizcaya A AU - Ostrosky P AD - IPN, CIIEMAD, Lab Monitoreo & Anal, Mexico City 07738, DF, MexicoIPN, CINVESTAV, Dept Toxicol, Mexico City 07738, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Med Genom & Toxicol Ambiental, Mexico City 04510, DF, MexicoCETESB, Setor Mutagenese & Citotxicidade, BR-05489900 Sao Paulo, Brazil TI - Genotoxicity of air particulate matter from Mexico City, Mexico, containing high levels of metals MH - Brazil MH - Mexico|Distrito Federal PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Genetics & Heredity;Toxicology U5 - J;Meeting Abstract AV - English IS - 0893-6692 UR - ISI:000223758700070 SO - Environmental and Molecular Mutagenesis 2004 ;44(3):202-202 11059 UI - 4264 AU - Gutierrez OQ AU - Marinone SG AU - Pares-Sierra A AD - Ctr Invest Cient & Educ Super Ensenada, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoMarinone, SG, POB 43-4844, San Diego, CA 92143, USA TI - Lagrangian surface circulation in the Gulf of California from a 3D numerical model AB - The surface circulation of the Gulf of California was studied from a Lagrangian point of view using the results of a 3D numerical model. The advection of particles, whose depth is fixed, was carried out for annual and monthly periods with 710 particles homogeneously distributed over the gulf. An anticyclonic circulation was found at the northern region from October to May and in the central and southern regions during May and from October to November; cyclonic circulation was found in the entire gulf from July to August. This circulation pattern agrees with direct measurements of drifters in the northern region. During the cyclonic period the particles from the central and southern regions travel to the northern basin where they are trapped by a gyre for more than a month. On the other hand, during the anticyclonic period the particles flow to the southern part of the gulf. Some particles escape to the Pacific Ocean and others remain in the gulf and return to the northern part during the cyclonic period. The principal gyre that appears on the center of the northern gulf in both cyclonic and anticyclonic periods traps particles for more than 30 days in a radius of 50 km. In the central and southern regions, a trapping zone was found in the peninsula side, where the particles travel less than 100 km in 30 days. On the other hand, over the continental coast there is a rapid transit zone. The particles escape only during the anticyclonic period. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700012 L2 - SEASONAL HEAT-BALANCE; OCEANOGRAPHIC PROCESSES; 3-DIMENSIONAL MODEL; NORTHERN GULF; SEA; VARIABILITY; OCEAN; TEMPERATURE; CURRENTS SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):659-672 11060 UI - 6158 AU - Gutierrez S AU - Marroquin JL AD - Brigham Young Univ, Provo, UT 84602, USACtr Invest Matemat, Guanajuato, Gto, MexicoGutierrez, S, Brigham Young Univ, 459 Clyde Bldg,POB 24099,1128 TMCB, Provo, UT 84602 USA TI - Robust approach for disparity estimation in stereo vision AB - In this paper, we present a robust probabilistic method for the estimation of stereo disparity. It is based in Bayesian estimation theory, with a prior Markov random field model for the assigned disparities. The optimal estimator is computed using a Gauss-Markov random field model for the corresponding posterior marginals, which results in a diffusion process in probability space. This process, with the appropriate boundary conditions, is also used to estimate disparity in problematic regions of stereo pairs, such as occluded areas and non-textured (homogeneous) regions. Experimental comparisons of the proposed approach with other state-of-the-art methods are presented as well. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Artificial Intelligence;Computer Science, Software Engineering;Computer Science, Theory & Methods;Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0262-8856 UR - ISI:000189130100002 L2 - stereo;disparity;occlusion;left-right disparity consistency;homogeneous regions;bayesian estimation;regularization;diffusion;ALGORITHM; DEPTH SO - Image and Vision Computing 2004 ;22(3):183-195 11061 UI - 5032 AU - Gutu O AU - Jaramillo JA AD - Univ Complutense Madrid, Dept Anal Matemat, E-28040 Madrid, SpainGutu, O, Univ Autonoma Estado Hidalgo, Ctr Invest Matemat, Pachuca 42074, Hidalgo, Mexico TI - Fibrations on Banach manifolds AB - Let f be a split submersion between paracompact Banach manifolds. We obtain here various conditions for f to be a fiber bundle. First, we give general conditions in terms of path-liftings. As a consequence, we deduce several criteria: For example, f is a fiber bundle provided it satisfies either some topological requirements ( such as being a proper or a closed map) or, in the case of Finsler manifolds, some metric requirements (such as Hadamard integral condition) MH - Mexico|Hidalgo MH - Spain PB - BERKELEY: PACIFIC JOURNAL MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0030-8730 UR - ISI:000222358500005 SO - Pacific Journal of Mathematics 2004 ;215(2):313-329 11062 UI - 4815 AU - Guven J AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoDublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, IrelandGuven, J, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Membrane geometry with auxiliary variables and quadratic constraints AB - Consider a surface described by a Hamiltonian which depends only on the metric and extrinsic curvature induced on the surface. The metric and the curvature, along with the basis vectors which connect them to the embedding functions defining the surface, are introduced as auxiliary variables by adding appropriate constraints, all of them quadratic. The response of the Hamiltonian to a deformation in each of the variables is determined and the relationship between the multipliers implementing the constraints and the conserved stress tensor of the theory established. For the purpose of illustration, a fluid membrane described by a Hamiltonian quadratic in curvature is considered MH - Ireland MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000223017100002 L2 - RED-BLOOD-CELL; FLUID MEMBRANES; INSTABILITY; VESICLE; ENERGY; SHAPE SO - Journal of Physics A-Mathematical and General 2004 ;37(28):L313-L319 11063 UI - 4700 AU - Guz AN AU - Zozulya VV AU - Men'shikov AV AD - Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, UA-252143 Kiev, UkraineCtr Invest Cientif Yucatan, Yucatan, MexicoGuz, AN, Natl Acad Sci Ukraine, SP Timoshenko Inst Mech, Zabolotny St 154, UA-252143 Kiev, Ukraine TI - General spatial dynamic problem for an elliptic crack under the action of a normal shear wave, with consideration for the contact interaction of the crack faces AB - Consideration is given to the contact interaction of the faces of a stationary plane elliptical crack under the action of a harmonic shear wave normally incident on the crack surface. The dependence of the mode II and III stress intensity factors on the wave number is studied for different values of the friction coefficient MH - Mexico|Yucatan MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 12 U4 - Mechanics U5 - J;Article AV - English IS - 1063-7095 UR - ISI:000223154900003 L2 - spatial dynamic problem;plane elliptical crack;harmonic shear wave;crack faces;contact interaction;stress intensity factor;wave number;friction coefficient;FRACTURE-MECHANICS; ALLOWANCE SO - International Applied Mechanics 2004 ;40(2):156-159 11064 UI - 6589 AU - Guzman-Novoa E AU - Hunt GJ AU - Uribe-Rubio JL AU - Prieto-Merlos D AD - INIFAP, Metepec 52140, MexicoPurdue Univ, Dept Entomol, W Lafayette, IN 47907, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zoot, Dept Esp Trad Abejas, Mexico City 04510, DF, MexicoGuzman-Novoa, E, INIFAP, Santa Cruz 29B Fracc, Metepec 52140, Mexico TI - Genotypic effects of honey bee (Apis mellifera) defensive behavior at the individual and colony levels: the relationship of guarding, pursuing and stinging AB - We analyzed the relationships of the guarding, stinging, pursuing and alarm pheromone responses of two types of bees: European (EHB) and Africanized honey bees (AHB). Single type ( source colonies) and two-type (EHB and AHB co-fostered) colonies were used. Of co-fostered bees, AHB comprised 81% of those that stung during the first 10 s. But from 10 to 30 s, AHB and EHB were equally likely to sting. However, when tested in their own colonies, two of the three EHB types did not sting and did not pursue in any of the eight trials conducted, whereas all three AHB types did in all trials. Moreover, AHB represented 90% of bees that stung observers during an 18-day observation period (25% of which were recently seen guarding). There was a relationship between pursuing and stinging of the six source colonies and the guarding behavior of co-fostered individuals from those sources. Results suggest that the more defensive bee types guard longer and may affect the thresholds of response of less defensive bees, recruiting them to sting. Results also suggest that the individual performance of different defensive tasks cause interactions that result in increased colony response MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000187803100002 L2 - Apis mellifera;genotypic effects;guarding behavior;Africanized bees;defensive behavior;DIVISION-OF-LABOR; GENETIC DOMINANCE; ALARM PHEROMONE; HYMENOPTERA; APIDAE; IDENTIFICATION; ASSAYS; QUEENS SO - Apidologie 2004 ;35(1):15-24 11065 UI - 4911 AU - Guzman FS AU - Urena-Lopez LA AD - Louisiana State Univ, Ctr Computat & Technol, Baton Rouge, LA 70803, USAAlbert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Golm, GermanyUniv Guanajuato, Inst Fis, Leon 37150, Guanajuato, MexicoGuzman, FS, Louisiana State Univ, Ctr Computat & Technol, Baton Rouge, LA 70803 USA TI - Evolution of the Schrodinger-Newton system for a self-gravitating scalar field AB - Using numerical techniques, we study the collapse of a scalar field configuration in the Newtonian limit of the spherically symmetric Einstein-Klein-Gordon system, which results in the so called Schrodinger-Newton (SN) set of equations. We present the numerical code developed to evolve the SN system and related topics, like equilibrium configurations and boundary conditions. Also, we analyze the evolution of different initial configurations and the physical quantities associated with them. In particular, we readdress the issue of the gravitational cooling mechanism for Newtonian systems and find that all systems settle down onto a zero-node equilibrium configuration MH - Germany MH - USA MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000222681600073 L2 - TIME PHASE-TRANSITION; BOSON STARS; GENERAL-RELATIVITY; GALACTIC HALO; SOLITON STARS; DARK-MATTER; APPROXIMATION; OSCILLATONS; PARTICLES; EQUATIONS SO - Physical Review D 2004 ;69(12): 11066 UI - 3356 AU - Guzman G AU - Ramirez-Guillen F AU - Miller OK AU - Lodge DJ AU - Baroni TJ AD - Inst Ecol, Jalapa 91070, Veracruz, MexicoUSDA, Forest Serv, Forest Prod Lab, Ctr Forest Mycol Res, Luquillo, PR 00773, USASUNY Coll Cortland, Dept Biol Sci, Cortland, NY 13045, USAGuzman, G, Inst Ecol, Apartado Postal 63, Jalapa 91070, Veracruz, Mexico TI - Scleroderma stellatum versus Scleroderma bermudense: the status of Scleroderma echinatum and the first record of Veligaster nitidum from the Virgin Islands AB - The type of Scleroderma stellatum from Brazil exhibits a sharp echinulate, dark brown peridium, and the type of S. bermudense from Bermuda has a peridium that is loosely woven and fibrillose, whitish to pale brownish. These characters indicate two independent species. This information is contrary to that of Guzman in 1970, who interpreted S. bermudense to be a synonym of S. stellatum based on the similar spores. Scleroderma echinatum from Borneo and Panama, as recently discussed by Guzman and Ovrebo, also has an echinulate, dark brown peridium and is a synonym of S. stellatum. All these fungi have a stellate dehiscence. New records of S. bermudense from the Greater Antilles and Mexico's Pacific Coast, and Veligaster nitidum from Virgin Islands also are discussed MH - Mexico|Veracruz MH - USA PB - LAWRENCE: ALLEN PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0027-5514 UR - ISI:000226442800022 L2 - Gasteromycetes;new records;Scleroderma;Sclerodermataceae;tropical fungi;Veligaster SO - Mycologia 2004 ;96(6):1370-1379 11067 UI - 5960 AU - Halfar J AU - Ingle JC AU - Godinez-Orta L AD - Univ Stuttgart, Inst Geol & Palaontol, D-70174 Stuttgart, GermanyStanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305, USACtr Interdisciplinario Ciencias Marinas, La Paz 23096, Baja Calif Sur, MexicoHalfar, J, Univ Stuttgart, Inst Geol & Palaontol, Herdweg 51, D-70174 Stuttgart, Germany TI - Modern non-tropical mixed carbonate-siliciclastic sediments and environments of the southwestern Gulf of California, Mexico AB - Modem mixed carbonate-siliciclastic warm-temperate environments were studied in the southern, Gulf of California (GOC), Mexico. The combined heterozoan and photozoan character is defined by the absence of true coral reef structures, calcareous green algae and non-skeletal grains, and the dominance of rhodoliths (unattached coralline red algae), mollusks and small coral patch reefs. The major carbonate producing environments are pocket bays, a shallow carbonate bioherm, high-energy rocky and sandy shorelines and mid-shelf settings. Sediments characterizing the pocket bays display heavily bioturbated bioclastic wackestone and grainstone textures. The rhodolith dominated bioherm is composed of coarse sediments exhibiting grainstone and rudstone textures with fine material being winnowed away by tidal currents. Rocky and sandy shorelines are characterized by erosion and mixing of up to boulder size granitic and volcaniclastic material with coralline red algal and molluskan carbonates. The mid-shelf settings are defined by a silt and fine sand sized non-carbonate matrix mixed with abundant molluskan fragments and foraminifera. Peak carbonate production takes place between 10 and 15 m water depth; below 40 m production significantly decreases, combined with a steep increase in the amount of siliciclastics. This is in contrast to many temperate and cool-water mixed-carbonate, siliciclastic systems, where most carbonate production occurs in mid- to outer shelf settings. A full spectrum of sediments from pure carbonates (90-100% carbonate), allochem carbonates (50-90% carbonate) and allochemic mud or sand (< 50% carbonate) was encountered in the study area. The absence of early diagenetic binding and cementation of the non-tropical carbonates facilitates mixing of carbonates and siliciclastics. The latter are mainly derived from adjacent Tertiary volcaniclastics and Mesozoic granites. Mixing takes place (1) as punctuated mixing during periodic short-term storm or hurricane events, when coarse granitic and volcaniclastic derived material eroded from rocky shorelines is transported into the shallow carbonate factories, and (2) as facies mixing on the outer carbonate shelf below 40 m water depth where carbonates interfinger with olive-gray sandy and silty siliciclastics. (C) 2004 Elsevier B.V. All fights reserved MH - Germany MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000220158800005 L2 - Gulf of California;heterozoan;photozoan;mixed carbonate-siliciclastics;warm temperate;SOUTHERN SPAIN; COOL-WATER; BAJA-CALIFORNIA; SEQUENCE STRATIGRAPHY; TEMPERATE CARBONATE; NEW-ZEALAND; SHELF; BASIN; DEPOSITION; PLATFORM SO - Sedimentary Geology 2004 ;165(1-2):93-115 11068 UI - 6100 AU - Halfar J AU - Godinez-Orta L AU - Mutti M AU - Valdez-Holguin JE AU - Borges JM AD - Univ Stuttgart, Inst Geol & Palaeontol, D-70174 Stuttgart, GermanyCrt Interdisciplinario Ciencias Marinas, La Paz 23000, BoliviaUniv Potsdam, Inst Geowissensch, D-14415 Potsdam, GermanyDept Invest Cient & Tecnol, Hermosillo 83000, Sonora, MexicoHalfar, J, Univ Stuttgart, Inst Geol & Palaeontol, D-70174 Stuttgart, Germany TI - Nutrient and temperature controls on modern carbonate production: An example from the Gulf of California, Mexico AB - In addition to salinity and temperature, nutrient concentrations in surface waters are known to have a significant impact on distribution of carbonate-producing biota, but have never been quantitatively evaluated against different temperatures along a latitudinal transect. The western coast of the Gulf of California, Mexico, presents a natural laboratory for investigating the influence of oceanographic parameters such as salinity, temperature, and chlorophyll a, a proxy for nutrients, on the composition of a range of modern heterozoan and photozoan carbonate environments along a north-south latitudinal gradient spanning the entire warm-temperate realm (29degreesN-23degreesN). Chlorophyll a, measured in situ at half-hour resolution, is highly variable throughout the year due to short-term upwelling, and increases significantly from the southern to northern Gulf of California. Salinity, in contrast, fluctuates little and remains at an average of 35%. From south to north, carbonate production ranges from oligotrophic-mesotrophic, coral reefdominated shallow-water areas (minimum temperature 18.6 degreesC) through mesotrophic-eutrophic, red algal-dominated, inner-shelf carbonate production in the central gulf (minimum temperature 16 degreesC), and to molluscan-bryozoan, eutrophic inner- to outer-shelf environments (minimum temperature 13.7 degreesC). The Gulf of California data, supplemented with oceanographic and compositional information from a database compiled from a spectrum of modern carbonate systems worldwide, demonstrates the significance of nutrient control in the formation of heterozoan, photozoan, and transitional heterozoan-photozoan carbonate systems and serves as a basis for more accurately interpreting fossil carbonates MH - Bolivia MH - Germany MH - Mexico|Sonora PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 15 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000189284200010 L2 - heterozoan;photozoan;nutrients;chlorophyll;Gulf of California;FACIES SO - Geology 2004 ;32(3):213-216 11069 UI - 4861 AU - Halhali A AU - Villa AR AU - Madrazo E AU - Soria MC AU - Mercado E AU - Diaz L AU - Avila E AU - Garabedian M AU - Larrea F AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City 14000, DF, MexicoHop St Vincent de Paul, Unite CNRS UPR 1524, F-75014 Paris, FranceHalhali, A, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Longitudinal changes in maternal serum 1,25-dihydroxyvitamin D and insulin like growth factor I levels in pregnant women who developed preeclampsia: comparison with normotensive pregnant women AB - This study was undertaken to determine the longitudinal changes of serum 1,25-dihydroxyvitamin D (1,25-(OH)(2)D) and insulin like growth factor I (IGF-I) levels at 20.7, 27.6, and 35.5 week periods of gestation in 40 pregnant women who remained normotensive (NT) and in 10 women who developed preeclampsia (PE). As compared with the first period, significant increases (P < 0.01) in maternal serum 1,25-(OH)(2)D and IGF-I were observed in the NT group. In the PE group, a similar increase in serum 1,25-(OH)(2)D was observed. In contrast, significant (P < 0.05) lower IGF-I levels were observed in the PE group at the moment of diagnosis. In addition a high incidence of subjects with low increase in IGF-I levels ( 0, upsilon(0,x) = epsilonupsilon(0) (x), upsilon(t) (0,x) = epsilonupsilon(1) (x) (1) in the sub critical case sigmais an element of (2 - epsilon(3),2). We assume that the initial data upsilon(0), (1 + partial derivative(x))(-1)(upsilon1) is an element of L(infinity)boolean ANDL(1,a), a is an element of (0,1) where L-1,L-a = {phi is an element of L-1; parallel tophiparallel to(L1,a) = parallel to<(.)>(a)phiparallel to(L1) = root1+x(2). Also we suppose that the mean value of initial data (R) (upsilon(0) (x) + upsilon(1) (x)) dx > 0. Then there exists a positive value epsilon such that the Cauchy problem (1) has a unique global solution upsilon (t, x) is an element of C ([0, infinity); L-infinity boolean AND L-1,L-a), satisfying the following time decay estimate: parallel toupsilon(t)parallel toL(infinity)less than or equal toCepsilon(-1/a) where large t > 0, here 2-epsilon(3) < sigma < 2. (C) 2004 Elsevier Inc. All rights reserved MH - Japan MH - Mexico|Michoacan PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Mathematics U5 - J;Article AV - English IS - 0022-0396 UR - ISI:000225413000006 L2 - damped wave equation;subcritical nonlinearity;asymptotic expansion;large time behavior;LARGE TIME BEHAVIOR; CAUCHY-PROBLEM SO - Journal of Differential Equations 2004 ;207(1):161-194 11086 UI - 5487 AU - Hayashi N AU - Ito N AU - Kaikina EI AU - Naumkin PI AD - Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, JapanSci Univ Tokyo, Fac Sci, Dept Math, Shinjuku Ku, Tokyo 162, JapanInst Tecnol Morelia, Dept Ciencias Basics, Morelia 58120, Michoacan, MexicoUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoHayashi, N, Osaka Univ, Grad Sch Sci, Dept Math, Toyonaka, Osaka 5600043, Japan TI - On some nonlinear dissipative equations with sub-critical nonlinearities AB - We study the Cauchy problem for the nonlinear dissipative equations (1) {partial derivative(t)u + alpha(-Delta)(p/2)u + beta\u\(sigma)u + gamma\u\(x)u = 0, x epsilon R-n, t > 0, u(0,x) = u(0)(x), x epsilon R-n, where alpha, beta, gamma epsilon C, Re alpha > 0, rho > 0, k > sigma > 0. We are interested in the critical case, sigma = (rho)/(n) and sub critical cases 0 < sigma < (rho)/(n). We assume that the initial data uo are sufficiently small in a suiatble norm, \integralu(0) (x) dx\ > 0 and Rebetadelta(alpha, rho, sigma) > 0, where delta(alpha, rho, sigma) = integral\G(x)\(sigma)G(x)dx and G (x) = F(-1)e(-alpha\epsilon\rho). In the sub critical case we assume that sigma is close to (rho)/(n). Then we prove global existence in time of solutions to the Cauchy problem (1) satisfying the time decay estimate \\u(t)\\(L)infinity less than or equal to {C (1 + t)(-1/sigma) (log (2 + t))(-1/sigma) if sigma = (rho)/(n,) C (1 + t)(-1/sigma) if sigma epsilon (0, (rho)/(n)) MH - Japan MH - Mexico|Michoacan PB - HSINCHU: MATHEMATICAL SOC REP CHINA RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 1027-5487 UR - ISI:000221322900010 L2 - nonlinear dissipative equations;sub-critical nonlinearties;LARGE TIME BEHAVIOR; GINZBURG-LANDAU EQUATION; CAUCHY-PROBLEM; GLOBAL-SOLUTIONS; HEAT-EQUATION; LOCAL SPACES; NONEXISTENCE SO - Taiwanese Journal of Mathematics 2004 ;8(1):135-154 11087 UI - 4609 AU - He S AU - De Luna E AD - Missouri Bot Garden, St Louis, MO 63166, USAInst Ecol, Dept Sistemat Vegetal, Xalapa 91000, Veracruz, MexicoHe, S, Missouri Bot Garden, Pob 299, St Louis, MO 63166, USA TI - The genus Braunia (Bryopsida, Hedwigiaceae) in China AB - Diagnoses are given for Braunia alopecura (Brid.) Limpr. and B. delavayi Besch. A key to two species of Braunia in China is provided. Braunia obtusicuspis Broth. is synonymized with Hedwigidium integrifolium (P. Beauv.) Dix MH - Mexico|Veracruz MH - USA PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000223476000013 L2 - Braunia;bryophytes;China;flora;Hedwigiaceae;Hedwigidium;moss SO - Bryologist 2004 ;107(3):373-376 11088 UI - 3471 AU - He ZH AU - Yang J AU - Zhang Y AU - Quail KJ AU - Pena RJ AD - Chinese Acad Agr Sci, Key Lab Crop Genet & Breeding, Natl Wheat Improvement Ctr, Inst Crop Breeding & Cultivat, Beijing 100081, Peoples R ChinaCAAS, CIMMYT China, Beijing 100081, Peoples R ChinaBRI Australia Ltd, N Ryde, NSW 2113, AustraliaCIMMYT, Mexico City 066000, DF, MexicoHe, ZH, Chinese Acad Agr Sci, Key Lab Crop Genet & Breeding, Natl Wheat Improvement Ctr, Inst Crop Breeding & Cultivat, 12 Zhongguancun S St, Beijing 100081, Peoples R China TI - Pan bread and dry white Chinense qualities in Chinese winter wheats AB - Improvements in pan bread quality and Chinese dry white noodle (DWCN) quality are the major breeding objectives in the north China winter wheat region. Eighty-one wheat cultivars and advanced lines were sown in two locations in the 2000-2001 season to evaluate the quality of winter wheat germplasm and investigate the association between pan bread quality and DWCN quality. Significant variability was observed for grain, pan bread, and DWCN quality attributes. Six cultivars and lines showed very good pan bread quality, 23 showed excellent DWCN quality in both locations, and the cultivars Yumai 34 and Sunstate showed superior quality for both food products. Protein content and grain hardness were significantly associated with pan bread quality, while the gluten quality-related parameters SDS-sedimentation value, Farinograph stability, and Extensograph maximum resistance, were significantly associated with pan bread quality score, and accounted for 59.3-72.3% of its variation. Yellow colour (b, CIE Lab) showed a strong negative association with pan bread and DWCN quality largely due to the strong and negative association between yellow colour and gluten strength parameters in this germplasm pool. Flour ash content and polyphenol oxidase (PPO) had a negative moderate effect on noodle colour, while protein content and grain hardness were negatively associated with noodle colour, appearance, and smoothness. The association between SDS-sedimentation volume, Farinograph stability, and Extensograph maximum resistance and DWCN score fitted a quadratic regression model, accounting for 31.0%, 39.0%, and 47.0% of the DWCN score, respectively. The starch pasting parameters, peak viscosity and paste breakdown, contributed positively to DWCN quality, with r = 0.57 and 0.55, respectively. Quality requirements for pan bread and DWCN differ in colour, gluten strength, and pasting viscosity. It is suggested that PPO, yellow pigment, SDS sedimentation volume, and peak viscosity are parameters that could be used to screen for DWCN quality in the early generations of a wheat-breeding program MH - Australia MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000226207800008 L2 - Triticum aestivum;bread wheat;pan bread;Chinese dry white noodles;colour;gluten strength;protein content;starch quality;JAPANESE NOODLE QUALITIES; ALKALINE NOODLES; ASIAN NOODLES; SPRING WHEAT; HARD WHITE; STARCH; FLOURS; BAKING; COMPONENTS; GENOTYPES SO - Euphytica 2004 ;139(3):257-267 11089 UI - 4062 AU - Hebden JC AU - Guerrero JJG AU - Chernomordik V AU - Gandjbakhche AH AD - Univ Coll London, Dept Med Phys & Bioengn, London WC1E 6JA, EnglandNatl Autonomous Univ Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoInst Child Hlth & Human Dev, Lab Integrat & Med Biophys, NIH, Bethesda, MD 20892, USAHebden, JC, Univ Coll London, Dept Med Phys & Bioengn, 11-20 Capper St, London WC1E 6JA, England TI - Experimental evaluation of an anisotropic scattering model of a slab geometry AB - A model has been developed based on random walk theory that allows the diffusion of light along a principal axis to differ from that in orthogonal directions. We present expressions that describe the time-resolved intensity measured across a slab and on the surface of a semi-infinite medium for a principal axis oriented parallel or perpendicular to the surface. The model of time-resolved transmittance is compared with experimental data acquired by use of a phantom consisting of wax fibers arranged within a solid cube of resin. It is shown that a single set of optical parameters is sufficient to model the experimental measurements acquired across all three orientations of the cube. (C) 2004 Optical Society of America MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000224600000020 L2 - OPTICAL-PROPERTIES; PHOTON MIGRATION; CONTRAST FUNCTIONS; TRANSILLUMINATION; DIFFUSION; TISSUES SO - Optics Letters 2004 ;29(21):2518-2520 11090 UI - 6256 AU - Hebert SC AU - Mount DB AU - Gamba G AD - Yale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06520, USAVet Adm Med Ctr W Roxbury, Div Renal, Boston, MA 02132, USAVet Adm Med Ctr W Roxbury, Membrane Biol Program, Boston, MA 02132, USABrigham & Womens Hosp, Boston, MA 02115, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Mexico City 04510, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoHebert, SC, Yale Univ, Sch Med, Dept Cellular & Mol Physiol, 333 Cedar St,POB 208026,SHM B147, New Haven, CT 06520 USA TI - Molecular physiology of cation-coupled Cl- cotransport: the SLC12 family AB - The electroneutral cation-chloride-coupled cotransporter gene family (SLC12) was identified initially at the molecular level in fish and then in mammals. This nine-member gene family encompasses two major branches, one including two bumetanide-sensitive Na+-K+-2Cl(-) cotransporters and the thiazide-sensitive Na+:Cl- cotransporter. Two of the genes in this branch (SLC12A1 and SLC12A3), exhibit kidney-specific expression and function in renal salt reabsorption, whereas the third gene (SLC12A2) is expressed ubiquitously and plays a key role in epithelial salt secretion and cell volume regulation. The functional characterization of both alternatively-spliced mammalian Na+-K+-2Cl(-) cotransporter isoforms and orthologs from distantly related species has generated important structure-function data. The second branch includes four genes (SLC12A4-7) encoding electroneutral K+-Cl- cotransporters. The relative expression level of the neuron-specific SLC12A5 and the Na+-K+-2Cl(-) cotransporter SLC12A2 appears to determine whether neurons respond to GABA with a depolarizing, excitatory response or with a hyperpolarizing, inhibitory response. The four K+-Cl- cotransporter genes are co-expressed to varying degrees in most tissues, with further roles in cell volume regulation, transepithelial salt transport, hearing, and function of the peripheral nervous system. The transported substrates of the remaining two SLC12 family members, SLC12A8 and SLC12A9, are as yet unknown. Inactivating mutations in three members of the SLC12 gene family result in Mendelian disease; Bartter syndrome type I in the case of SLC12A1, Gitelman syndrome for SLC12A3, and peripheral neuropathy in the case of SLC12A6. In addition, knockout mice for many members of this family have generated important new information regarding their respective physiological roles MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 51 U4 - Physiology U5 - J;Review AV - English IS - 0031-6768 UR - ISI:000188837300013 L2 - thiazide;bumetanide;Bartter's syndrome;Gitelman's syndrome;corpus callosum;peripheral neuropathy;epilepsy;GABA (gamma-aminobutyric acid);THICK ASCENDING LIMB; DISTAL CONVOLUTED TUBULE; SODIUM-CHLORIDE COTRANSPORTER; SECRETORY NA+-K+-2CL(-) COTRANSPORTER; NEURONAL-SPECIFIC ISOFORM; POSTNATAL RAT BRAINS; NA-K-ATPASE; NA-K-2CL COTRANSPORTER; BARTTERS-SYNDROME; FUNCTIONAL EXPRESSION SO - Pflugers Archiv-European Journal of Physiology 2004 ;447(5):580-593 11091 UI - 4647 AU - Hebrard J AU - Metais O AU - Salinas-Vasquez M AD - LEGI, F-38041 Grenoble 09, FranceInst Mecan Grenoble, F-38041 Grenoble, FranceUNAM, Inst Ingn, Mexico City, DF, MexicoHebrard, J, LEGI, BP 53, F-38041 Grenoble 09, France TI - Large-eddy simulation of turbulent duct flow: heating and curvature effects AB - Large eddy simulations of the turbulent gas flow within ducts of square cross-section are performed. The spatial development of turbulent flow inside a heated straight duct is first considered with a higher temperature suddenly imposed at one of the duct walls. The downstream development of the thermal boundary layer is then studied and compared with the fully developed turbulent case. The gradual increase with temperature of the viscosity near the heated wall yields a progressive enhancement of the turbulent structures and to a single ejection localized near the middle plane of the heated wall. The use of curvilinear coordinates allows to consider ducts of more complex geometries and to investigate the combined effects of heating and curvature. The case of an S-shape duct is then considered exhibiting both convex and concave curvatures. The pressure gradient between the inner and outer wall of the curved sections leads to the apparition of intense counter-rotating Dean vortices associated with an intense transverse flow with a maximum intensity of 22% of the bulk velocity. Downstream of the second curved section of the duct, the flow exhibits a complex distribution of various vortices. In the heated case, the mutual interaction between the heating and the Dean vortices is investigated. The heating is seen to enhance both the size and intensity of the Dean vortices when situated close to the heated wall. (C) 2004 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Thermodynamics;Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0142-727X UR - ISI:000223397600001 L2 - turbulence;large eddy simulation;heat transfer;curvature;BOUNDARY-CONDITIONS; CURVED DUCT SO - International Journal of Heat and Fluid Flow 2004 ;25(4):569-580 11092 UI - 2976 AU - Heilbrunn KR AU - Cardiel MH AU - Tumlin JA AU - Furie RA AU - Wallace DJ AU - Hura C AU - Strand V AU - Joh T AD - La Jolla Pharmaceut, San Diego, CA, USACiencas Med & Nutr Salvador, Mexico City, DF, MexicoEmory Univ, Atlanta, GA 30322, USAN Shore Univ Hosp, Manhasset, NY, USAUniv Calif Los Angeles, Cedars Sinai Med Ctr, Los Angeles, CA 90048, USASan Antonio Kidney Dis Ctr, San Antonio, TX, USAStanford Univ, Palo Alto, CA 94304, USA TI - The effect of LJP 394 and concomitant immunosuppressive agents on levels of anti-dsDNA antibodies in SLE patients MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000223799001074 SO - Arthritis and Rheumatism 2004 ;50(9):S406-S406 11093 UI - 4066 AU - Helene P AU - Pereira MF AU - Castro P AD - Univ Sao Paulo, PCC, BR-01303060 Sao Paulo, BrazilIPN, CINVESTAV, Unidad Merida, Merida, MexicoHelene, P, Univ Sao Paulo, PCC, Rua Visconde Ouro Preto 51 203, BR-01303060 Sao Paulo, Brazil TI - Performance of 40 a year old concrete bridge with embedded, prestressed galvanized strands AB - Despite recent literature that discourages the use of prestressed galvanized steel in concrete, a 40-year-old bridge with these characteristics has performed well. A detailed inspection was performed using electrochemical, mechanical, physical, and chemical techniques on-site and in the laboratory. Contrary to what was expected, the results indicated that some strands showed corrosion on some wires because of insufficient concrete cover; this exposed the strand to the atmosphere instead of causing stress corrosion or hydrogen embrittlement MH - Brazil MH - Mexico|Yucatan PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0094-1492 UR - ISI:000224623100021 SO - Materials Performance 2004 ;43(10):42-45 11094 UI - 5201 AU - Helguera-Repetto C AU - Cox RA AU - Munoz-Sanchez JL AU - Merchand JA AD - IPN, Dept Microbiol, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoEscuela Nacl Ciencias Biol, Dept Bioquim, IPN, Prolongac Carpio & Plan Ayala SIN, Mexico City 11340, DF, MexicoNatl Inst Med Res, Div Mycobacterial Res, London NW7 1AA, EnglandGonzalez-y-Merchand, JA, IPN, Dept Microbiol, Escuela Nacl Ciencias Biol, Col Santo Tomas,Prolongac Carpio & Plan Ayala SIN, Mexico City 11340, DF, Mexico TI - The pathogen Mycobacterium marinum, a faster growing close relative of Mycobacterium tuberculosis, has a single rRNA operon per genome AB - Although Mycobacterium marinum and Mycobacterium tuberculosis are very closely related they differ significantly in their growth rates. The Type strain of M. marinum and one clinical isolate were investigated and, like M. tuberculosis, were found to have a single rRNA (rrn) operon per genome located downstream from murA gene and controlled by two promoters. No sequence differences were found that account for the difference in the growth rates of the two species. We infer that M. tuberculosis has the capacity to synthesize rRNA much faster than it actually does; and propose that the high number of insertion sequences in this species attenuate growth rate to lower values. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000222144400010 L2 - rRNA operon;transcription start point;Mycobacterium marinum;NUCLEOTIDE-SEQUENCE; GENES; PROMOTER; ULCERANS; NUMBER; HOST; DIFFERENTIATION; SMEGMATIS; PROTEIN; LEPRAE SO - Fems Microbiology Letters 2004 ;235(2):281-288 11095 UI - 4657 AU - Hell P AU - Montellano-Ballesteros JJ AD - Simon Fraser Univ, Sch Comp Sci, Burnaby, BC V5A 1S6, CanadaUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoHell, P, Simon Fraser Univ, Sch Comp Sci, Burnaby, BC V5A 1S6, Canada TI - Polychromatic cliques AB - The sub-Ramsey number sr(K-n,k) is the smallest integer m such that in any edge-colouring of K-m which uses every colour at most k times some subgraph K-n has all edges of different colours. It was known that, for a fixed k, the function sr(K-n,k) is O(n(3)) and Omega(n). We improve these bounds to O(n(2)) and Omega(n(3/2)) (slightly less for small values of k). (C) 2004 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000223112600030 L2 - polychromatic;sub-Ramsey number;anti-Ramsey;clique;SUB-RAMSEY NUMBERS SO - Discrete Mathematics 2004 ;285(1-3):319-322 11096 UI - 3587 AU - Henderson IR AU - Navarro-Garcia F AU - Desvaux M AU - Fernandez RC AU - Ala'Aldeen D AD - Univ Birmingham, Sch Med, Div Immunity & Infect, Birmingham B15 2TT, W Midlands, EnglandUniv Nottingham Hosp, Div Microbiol & Infect Dis, Nottingham NG7 2UH, EnglandCINVESTAV, Dept Cell Biol, Mexico City 14000, DF, MexicoUniv British Columbia, Dept Microbiol & Immunol, Vancouver, BC V5Z 1M9, CanadaHenderson, IR, Univ Birmingham, Sch Med, Div Immunity & Infect, Birmingham B15 2TT, W Midlands, England TI - Type V protein secretion pathway: the autotransporter story AB - Gram-negative bacteria possess an outer membrane layer which constrains uptake and secretion of solutes and polypeptides. To overcome this barrier, bacteria have developed several systems for protein secretion. The type V secretion pathway encompasses the autotransporter proteins, the two-partner secretion system, and the recently described type Vc or AT-2 family of proteins. Since its discovery in the late 1980s, this family of secreted proteins has expanded continuously, due largely to the advent of the genomic age, to become the largest group of secreted proteins in gram-negative bacteria. Several of these proteins play essential roles in the pathogenesis of bacterial infections and have been characterized in detail, demonstrating a diverse array of function including the ability to condense host cell actin and to modulate apoptosis. However, most of the autotransporter proteins remain to be characterized. In light of new discoveries and controversies in this research field, this review considers the autotransporter secretion process in the context of the more general field of bacterial protein translocation and exoprotein function MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 116 U4 - Microbiology U5 - J;Review AV - English IS - 1092-2172 UR - ISI:000225854100007 L2 - OUTER-MEMBRANE-PROTEIN; ENTEROPATHOGENIC ESCHERICHIA-COLI; PYLORI VACUOLATING CYTOTOXIN; GRAM-NEGATIVE BACTERIA; PERTUSSIS FILAMENTOUS HEMAGGLUTININ; SIGNAL RECOGNITION PARTICLE; ACTIN-BASED MOTILITY; MARCESCENS SERINE-PROTEASE; INFLUENZAE HAP AUTOTRANSPORTER; IMMUNOGLOBULIN A1 PROTEASE SO - Microbiology and Molecular Biology Reviews 2004 ;68(4):692-+ 11097 UI - 3710 AU - Hendricks J AU - Karcher B AU - Dopelheuer A AU - Feichter J AU - Lohmann U AU - Baumgardner D AD - DLR, Inst Phys Atmosphare, Oberpfaffenhofen, GermanyDLR, Inst Antriebstech, Cologne, GermanyMax Planck Inst Meteorol, Hamburg, GermanyDalhousie Univ, Halifax, NS, CanadaUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoHendricks, J, DLR, Inst Phys Atmosphare, Oberpfaffenhofen, Germany TI - Simulating the global atmospheric black carbon cycle: a revisit to the contribution of aircraft emissions AB - The black carbon ( BC) burden of the upper troposphere and lowermost stratosphere (UTLS) is investigated with the general circulation model (GCM) ECHAM4. The special focus is the contribution of aircraft emissions to the UTLS BC loading. Previous studies on the role of aircraft emissions in the global BC cycle either neglect BC sources located at the Earth's surface or simplify the BC cycle by assuming pre-defined BC residence times. Here, the global BC cycle including emissions, transport, and removal is explicitly simulated. The BC emissions considered include surface sources as well as BC from aviation. This enables a consistent calculation of the relative contribution of aviation to the global atmospheric BC cycle. As a further extension to the previous studies, the aviation-induced perturbation of the UTLS BC particle number concentration is investigated. The uncertainties associated with the model predictions are evaluated by means of several sensitivity studies. Especially, the sensitivity of the results to different assumptions on the BC hygroscopic properties is analysed. The simulated UTLS BC concentrations are compared to in-situ observations. The simulations suggest that the large-scale contribution of aviation to the UTLS BC mass budget typically amounts to only a few percent, even in the most frequented flight regions. The aviation impact far away from these regions is negligible. The simulated aircraft contributions to the UTLS BC particle number concentration are much larger compared to the corresponding mass perturbations. The simulations suggest that aviation can cause large-scale increases in the UTLS BC particle number concentration of more than 30% in regions highly frequented by aircraft. The relative effect shows a pronounced annual variation with the largest relative aviation impact occurring during winter MH - Canada MH - Germany MH - Mexico|Distrito Federal PB - KATLENBURG-LINDAU: EUROPEAN GEOSCIENCES UNION RP - NOT IN FILE U3 - TC 16 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1680-7324 UR - ISI:000225707000002 L2 - AVIATION-PRODUCED AEROSOLS; GENERAL-CIRCULATION MODEL; CIRRUS CLOUD FORMATION; IN-SITU MEASUREMENTS; SULFATE AEROSOLS; LOWER STRATOSPHERE; UPPER TROPOSPHERE; SOOT PARTICLES; MASS CLOSURE; TRANSPORT SO - Atmospheric Chemistry and Physics 2004 ;4():2521-2541 11098 UI - 6496 AU - Heredia-Leon JC AU - Talamas-Abbud R AU - Mendoza-Guzman V AU - Solis-Martinez F AU - Jimenez-Castro J AU - Barnard J AU - Quintero-Ramos A AD - Univ Autonoma Chihuahua, Fac Quim, Chihuahua, MexicoUniv Autonoma Chihuahua, Fac Med, Col Ctr, Chihuahua, MexicoCornell Univ, Dept Food Sci & Technol, New York State Agr Expt Stn, Geneva, NY 14456, USAQuintero-Ramos, A, Univ Autonoma Chihuahua, Fac Quim, POB 1542 C, Chihuahua, Mexico TI - Structural and physical properties of dried Anaheim chilli peppers modified by low-temperature blanching AB - The effect of low-temperature blanching and drying processes on the ultrastructural and physical properties of Anaheim chilli pepper was studied and optimum conditions to provide a final product with maximum firmness were determined. Lots of Anaheim pepper were blanched in water for 4 min at 48, 55, 65, 75 and 82degreesC and maintained for hold times of 35, 45, 60, 75 and 85 min, blanched again for 4 min at 96degreesC and dehydrated at 53, 60, 70, 80 and 87degreesC. After treatment the samples were rehydrated in water at 30degreesC. Rehydration ratio, texture and structural changes were evaluated. Optimisation used a second-order rotatable central composite design. Texture and rehydration ratio were affected by blanching temperature and the interaction of blanching temperature with hold time (p less than or equal to 0.05); drying temperature did not show a significant effect. The best results, ie those which gave greatest firmness, were obtained by blanching at 64degreesC for 4 min, holding for 55 min after blanching, followed by a second blanching at 96degreesC for 4 min and then drying at 70degreesC. Evaluation of the rehydrated dried pepper by microscopy showed that low-temperature blanching close to the optimum conditions provided a protective effect in maintaining cell wall integrity. The results of processing increased firmness in the rehydrated product by a factor of 1.97. (C) 2003 Society of Chemical Industry MH - Mexico|Chihuahua MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000187839000007 L2 - texture;ultrastructural changes;physical properties;Anaheim pepper;drying;blanching;RESPONSE-SURFACE METHODOLOGY; BELL PEPPERS; FIRMNESS; OPTIMIZATION; CARROTS; TEXTURE; DEHYDRATION; VEGETABLES; CHEMISTRY; BEANS SO - Journal of the Science of Food and Agriculture 2004 ;84(1):59-65 11099 UI - 5547 AU - Heres-Pulido ME AU - Duenas-Garcia I AU - Castaneda-Partida L AU - Sanchez-Garcia A AU - Contreras-Sousa M AU - Duran-Diaz A AU - Graf U AD - Swiss Fed Inst Technol, Inst Anim Sci, Sect Physiol & Anim Husb, CH-8603 Schwerzenbach, SwitzerlandUniv Nacl Autonoma Mexico, FES Iztacala, Lab Genet Toxicol, Tlalnepantla 54090, Estado Mexico, MexicoGraf, U, Swiss Fed Inst Technol, Inst Anim Sci, Sect Physiol & Anim Husb, Schorenstr 16, CH-8603 Schwerzenbach, Switzerland TI - Genotoxicity of tamoxifen citrate and 4-nitroquinoline-1-oxide in the wing spot test of Drosophila melanogaster AB - Tamoxifen (TAM) is an anti-oestrogen used for treatment and prevention of human breast cancer, but it is also related to human endometrial and uterine cancer. The wing spot test in Drosophila melanogaster was employed to determine the genotoxic effects of TAM and 4-nitroquinoline-1-oxide (4-NQO), a carcinogen that produces adducts similar to TAM-DNA adducts detected in rodent liver and human liver microsomes. As Drosophila spp. have no oestrogen receptor, no effects can result in binding of TAM to a receptor. Chronic treatments with TAM citrate were performed with 3-day-old larvae of the standard (ST) and high bioactivation (HB) crosses of the wing spot test at concentrations of 0.66, 1.66 and 3.33 mM. In addition, the carcinogen 4-NQO was administered at 2.5 and 5.0 mM. Somatic spots on normal wings from marker- heterozygous flies and on serrate wings from balancer- heterozygous flies were scored to determine mutation and recombination events in somatic cells for each compound. The results showed genotoxic effects of TAM at 1.66 and 3.33 mM in the ST cross only and without a clear dose-response effect. This suggests a weak genotoxicity of this anti-oestrogen. The negative results obtained with TAM in the HB cross may indicate efficient detoxification of the compound by the increased xenobiotic metabolism present in this cross. As reported before, 4-NQO showed genotoxic effects in the ST cross with a clear dose-response effect. For the first time, we report enhanced effects of this compound in the HB cross. It is concluded that the genotoxicity of TAM in the Drosophila wing spot test is different from that of 4-NQO MH - Mexico|Estado De Mexico MH - Switzerland PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Genetics & Heredity;Toxicology U5 - J;Article AV - English IS - 0267-8357 UR - ISI:000221295800003 L2 - HUMAN CYTOCHROME-P450 ENZYMES; SOMATIC MUTATION; RECOMBINATION TEST; TRICYCLIC ANTIDEPRESSANTS; DNA ADDUCTS; IN-VIVO; BIOACTIVATION; INDUCTION; CELLS; CARCINOGENS SO - Mutagenesis 2004 ;19(3):187-193 11100 UI - 4051 AU - Hernandez-Anguiano AM AU - Suslow TV AU - Leloup L AU - Kado CI AD - Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616, USAColegio Postgrad, Inst Fitosanidad, Montecillo 56230, Texcoco, MexicoKado, CI, Univ Calif Davis, Dept Plant Pathol, Davis, CA 95616, USA TI - Biosurfactants produced by Pseudomonas fluorescens and soft-rotting of harvested florets of broccoli and cauliflower AB - Mini-Tn5 transposon mutagenesis of a soft-rotting isolate of Pseudomonas fluorescens strain 123 produced six mutant phenotypes with altered pathogenicity and inability to produce a biosurfactant involved in dispersing P. fluorescens cells in a surface aqueous environment. The mutants isolated showed in vivo growth characteristics identical to those of the wild type, but variations in their ability to reduce surface tension of water and to grow in liquid medium containing hexadecane. One of these mutants (EG3) with reduced pathogenicity on broccoli and cauliflower exhibited a restored pathogenic phenotype when complemented with a 7.1-kb segment of P. fluorescens genomic DNA. The loss of aqueous-surface-tension activity in mutants suggests that a biosurfactant may contribute to pathogenicity and enhance pathogen invasion of host tissues MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0032-0862 UR - ISI:000224678700006 L2 - genetic complementation;psychrotrophic pseudomonad;transposon mutagenesis;water-soaking;PECTOLYTIC STRAIN; CLONING VECTORS; PROTEIN-D; HEAD ROT; AERUGINOSA; VISCOSIN; MARGINALIS SO - Plant Pathology 2004 ;53(5):596-601 11101 UI - 4018 AU - Hernandez-Beltran F AU - Quintana-Solorzano R AU - Sanchez-Valente J AU - Figueras F AU - Guzman-Castillo ML AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoInst Rech Catalyse, F-69626 Villeurbanne, FranceHernandez-Beltran, F, Inst Mexicano Petr, Eje Cent L,Cardenas 152, Mexico City 07730, DF, Mexico TI - On the effect of a high reactive sulfur species on sulfur reduction in gasoline AB - Varying solutions are available for reducing the amount of sulfur contained in gasoline from fluid catalytic cracking units (FCCUs). However, the use of selective catalysts or additives can be the easiest to implement and potentially represent the most cost effective solution. In order to improve overall performance a better understanding of the effects of the feed properties on catalyst activity is needed. In this work we study the effect of a high reactive sulfur compound on the sulfur distribution in cracked products. Experiments were carried out in a fixed fluidized bed reactor using a REUSY equilibrium catalyst (Ecat), a commercial additive for gasoline sulfur reduction and an industrial feed spiked with hexane-2-thiol. The acidity of the materials was studied using FTIR spectra of chemisorbed pyridine. With spiked feeds both Ecat and the additive exhibited lower cracking activity indicating that the hexane-2-thiol had a strong poisoning effect on the materials acid sites. The effect of the type of acidity of the materials used is discussed and a selective adsorption of hexane-2-thiol on Lewis acid sites is proposed to explain the observed results. Similar trends were generated with a high sulfur feed derived from a Mayan crude oil thus leading to the conclusion that the presence of nonthiophenic sulfur compounds in the feed might have a strong negative effect on sulfur reduction. The potential use of an alumina material, possessing Bronsted and Lewis acidity, for sulfur reduction is presented and discussed MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000224407800020 L2 - NUCLEAR-MAGNETIC-RESONANCE; CATALYTIC CRACKING; NAPHTHA; REMOVAL SO - Fluid Catalytic Cracking Vi: Preparation and Characterization of Catalysts 2004 ;149():355-367 11102 UI - 6556 AU - Hernandez-Ceron J AU - Chase CC AU - Hansen PJ AD - Univ Florida, Dept Anim Sci, Gainesville, FL 32611, USAARS, Subtrop Agr Res Stn, USDA, Brooksville, FL 34601, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Reprod, Mexico City 14000, DF, MexicoHansen, PJ, Univ Florida, Dept Anim Sci, Gainesville, FL 32611, USA TI - Differences in heat tolerance between preimplantation embryos from Brahman, Romosinuano, and Angus breeds AB - Exposure to 41degreesC reduces development of embryos of heat-sensitive breeds (Holstein and Angus) more than for embryos of the heat-tolerant Brahman breed. Here it was tested whether embryonic resistance to heat shock occurs for a thermotolerant breed of different genetic origin than the Brahman. In particular, the thermal sensitivity of in vitro produced embryos of the Romosinuano, a Bos taurus, Criollo-derived breed, was compared to that for in vitro produced Brahman and Angus embryos. At d 4 after insemination, embryos greater than or equal to8 cells were randomly assigned to control (38.5degreesC) or heat shock (41degreesC for 6 h) treatments. Heat shock reduced the proportion of embryos that developed to the blastocyst stage on d 8 after insemination. At 38.5degreesC, there were no significant differences in development between breeds. Among embryos exposed to 41degreesC, however, development was lower for Angus embryos than for Brahman and Romosinuano embryos. Furthermore, an Angus vs. ( Brahman + Romosinuano) x temperature interaction occurred because heat shock reduced development more in Angus (30.3 +/- 4.6% at 38.5degreesC vs. 4.9 +/- 4.6% at 41degreesC) than in Brahman (25.1 +/- 4.6% vs. 13.6 +/- 4.6%) and Romosinuano (28.3 +/- 4.1% vs. 17.5 +/- 4.1%). Results demonstrate that embryos from Brahman and Romosinuano breeds are more resistant to elevated temperature than embryos from Angus. Thus, the process of adaptation of Brahman and Romosinuano breeds to hot environments resulted in both cases in selection of genes controlling thermotolerance at the cellular level MH - Mexico|Distrito Federal MH - USA PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000187665400007 L2 - heat shock;embryo;cattle breed;DEVELOPMENTAL-CHANGES; BOVINE EMBRYOS; HOLSTEIN COWS; BOS-TAURUS; SHOCK; CATTLE; TEMPERATURES; RESISTANCE; RESPONSES; LYMPHOCYTES SO - Journal of Dairy Science 2004 ;87(1):53-58 11103 UI - 5600 AU - Hernandez-Garduno E AU - Brauer M AU - Perez-Neria J AU - Vedal S AD - Univ British Columbia, Sch Occupat & Environm Hyg, Vancouver, BC V6T 123, CanadaBritish Columbia Ctr Dis Control, Dept TB Control, Vancouver, BC, CanadaUniv British Columbia, Dept Med, Vancouver, BC, CanadaInst Nacl Enfermedades Resp, Mexico City, DF, MexicoNatl Jewish Med & Res Ctr, Dept Environm & Occupat Htlh Sci, Denver, CO, USABrauer, M, Univ British Columbia, Sch Occupat & Environm Hyg, 2206 E Mall, Vancouver, BC V6T 123, Canada TI - Wood smoke exposure and lung adenocarcinoma in non-smoking Mexican women AB - OBJECTIVE: To determine the association between long-term exposure to wood smoke from cooking and lung adenocarcinoma in non-smoking Mexican women. METHODS: We reviewed records of hospitalized patients at a chest referral hospital in Mexico City and identified 113 histologically proven lung adenocarcinoma cases in non-smoking women. Four control groups of non-smoking women were also selected: 99 patients with pulmonary tuberculosis (PTB), 110 with interstitial lung disease (ILD), 64 with miscellaneous pulmonary conditions (MISC), and the three control groups combined (COMB) (n = 273). RESULTS: Exposure was assessed on the basis of questionnaire responses at the time of hospital admission. Exposure to wood smoke for more than 50 years, but not for shorter periods, was associated with lung cancer after adjusting for age, education, socio-economic status and environmental tobacco smoke (ETS) exposure. Adjusted odds ratios from the multivariable logistic regression models were 1.4 (95%CI 0.6-2.0) for cases vs. TB controls, 1.9 (95%CI 0.9-4.0) for cases vs. ILD controls, 2.6 (95%CI 1.0-6.3) for cases vs. MISC controls and 1.9 (95%CI 1.1-3.5) for cases vs. COMB controls. CONCLUSION: These findings suggest that long-term exposure to wood smoke from cooking may contribute to the development of lung cancer MH - Canada MH - Mexico|Distrito Federal MH - USA PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 8 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000221164700016 L2 - wood smoke;adenocarcinoma;lung cancer;biomass;indoor air;INDOOR AIR-POLLUTION; UNVENTED COAL SMOKE; POLYCYCLIC AROMATIC-HYDROCARBONS; XUAN-WEI; DEVELOPING-COUNTRIES; CURRENT PROGRESS; CANCER; CHINA; RISK; COMBUSTION SO - International Journal of Tuberculosis and Lung Disease 2004 ;8(3):377-383 11104 UI - 6338 AU - Hernandez-Jauregui P AU - Mendoza HR AU - Garcia CM AU - Moreno-Lopez J AU - Kennedy S AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Oriente, Lab Patol Expt, Puebla 72430, MexicoNatl Autonomous Univ Mexico, Fac Vet Med, Dept Prod Porcina, Mexico City 04510, DF, MexicoSwedish Univ Agr Sci, Dept Vet Microbiol, S-75123 Uppsala, SwedenDept Agr & Rural Dev, Vet Sci Div, Belfast BT4 3SD, Antrim, North IrelandKennedy, S, Inst Mexicano Seguro Social, Ctr Invest Biomed Oriente, Lab Patol Expt, Puebla 72430, Mexico TI - Experimental porcine rubulavirus (La Piedad-Michoacan virus) infection in pregnant gilts AB - Porcine rubulavirus (La Pieclad-Michoacan virus) (PoRV-LPMV) is a member of the Paramyxoviridae family that causes encephalitis in voting piglets and infertility in adult sows and boars. Infertility in sows naturally infected by PoRV-LPMV is characterized by an increased number of returns to oestrus, stillbirths and mummified fetuses. In this study, nine seronegative gilts were inoculated intranasally with the PAC-3 strain of PoRV LPMV at week 6 or 10 of gestation. These animals were then killed at weeks 8 or 15 of gestation (seven gilts) or after natural parturition (two gilts). Four control gilts were mock-infected at gestation week 6 or 10 and killed between 2 and 4 weeks later. Gross lesions of focal congestion and haemorrhage were seen in the placenta and endometrium of one gilt infected at gestation week 6 and one infected at gestation week 10. PoRV-LPMV was isolated, at 2-6 weeks post-inoculation (pi), from lung, tonsils, ovary, placenta, uterus and lymph nodes of three of the gilts infected at gestation week 6 and at 2-3 weeks pi from lung, tonsil and ovary of two gilts infected at gestation week 10. Many of the fetuses of eight infected gilts were smaller than normal and had dermal ecchymoses. Dehydrated or mummified fetuses were present in six of the infected gilts but not in any control animal. PoRV-LPMV was isolated from brain, lung and liver of fetuses from two gilts infected at gestation week 6, and from two infected at gestation week 10. These results indicate that, after experimental infection, PoRV can replicate in tissues of seronegative pregnant gilts, cross the placenta, and cause fetal death and mummification. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - United Kingdom MH - Sweden PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Pathology;Veterinary Sciences U5 - J;Article AV - English IS - 0021-9975 UR - ISI:000188665700001 L2 - fetal infection;paramyxovirus;pig;porcine rubulavirus;reproductive failure;rubulavirus;viral infection;PARAMYXOVIRUS LPMV INFECTION; PIGS SO - Journal of Comparative Pathology 2004 ;130(1):1-6 11105 UI - 4157 AU - Hernandez-Lerma O AU - Romera R AD - Inst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoUniv Carlos III Madrid, Dept Estadist, Madrid 28903, SpainHernandez-Lerma, O, Inst Politecn Nacl, CINVESTAV, Dept Matemat, A Postal 14-740, Mexico City 07000, DF, Mexico TI - The scalarization approach to multiobjective Markov control problems: Why does it work? AB - This paper concerns discrete-time multiobjective Markov control processes on Borel spaces and unbounded costs. Under mild assumptions, it is shown that the usual "scalarization approach" to obtain Pareto policies for the multiobjective control problem is in fact equivalent to solving the dual of a certain multiobjective infinite-dimensional linear program. The latter program is obtained from a multiobjective measure problem which is also used to prove the existence of strong Pareto policies, that is, Pareto policies whose cost vector is the closest to the control problem's virtual minimum MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0095-4616 UR - ISI:000224611900005 L2 - Markov control processes;multiobjective control problems;Pareto optimality;(infinite-dimensional) multiobjective linear programming;DECISION-PROCESSES; OPTIMALITY; POLICIES; CRITERIA; COSTS SO - Applied Mathematics and Optimization 2004 ;50(3):279-293 11106 UI - 3590 AU - Hernandez-Llamas A AU - Ratkowsky DA AD - CIBNOR, La Paz, BCS, MexicoUniv Tasmania, Sch Agr Sci, Hobart, Tas 7001, AustraliaHernandez-Llamas, A, CIBNOR, Apdo Postal 128, La Paz, BCS, Mexico TI - Growth of fishes, crustaceans and molluscs: estimation of the von Bertalanffy, Logistic, Gompertz and Richards curves and a new growth model AB - A total of 16 data sets on wild and cultivated fishes, crustaceans and molluscs were used to test and compare conventional growth curves (von Bertalanffy, Logistic, Gompertz and Richards) and a new growth model. Statistical properties for estimation of the models were evaluated and compared to determine suitability. The absolute value of the Hougaard measure of skewness of parameter estimates (h) was used as the criterion to evaluate statistical behaviour of the models. For conventional curves, the cases where the estimates were severely skewed or contained considerable nonlinearity (h > 0.15) were: von Bertalanffy (93.5%), Logistic (87.5%), Gompertz (85.1%) and Richards (97.6%). Depending on the parameterization used in the new model, 87.5 to 91.6%, had negligible skewness (h less than or equal to 0.1), indicating desirable close-to-linear behaviour and better performance than conventional growth curves. The poor statistical properties for estimation of conventional growth curves call for a critical reconsideration of their indiscriminate use to model growth of fishes, crustaceans and molluscs. The new model can be reliably used to analyze growth of organisms under a wide variety of situations and to derive statistical inferences of possible relations of its parameters with ecological or management variables MH - Australia MH - Mexico|Baja California Sur PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 4 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000225791900020 L2 - growth modeling;von Bertalanffy;logistic;Gompertz;Richards;PENAEUS-STYLIROSTRIS; COASTAL WATERS; AGE; PONDS SO - Marine Ecology-Progress Series 2004 ;282():237-244 11107 UI - 3648 AU - Hernandez-Lucas I AU - Rogel-Hernandez MA AU - Segovia L AU - Rojas-Jimenez K AU - Martinez-Romero E AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoUniv Nacl Autonoma Mexico, Dept Ingn Celular & Biocatalisis, Cuernavaca 62191, Morelos, MexicoUniv Marburg, FB Biol, Marburg, GermanyHernandez-Lucas, I, Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Apdo Postal 565-A, Cuernavaca 62191, Morelos, Mexico TI - Phylogenetic relationships of rhizobia based on citrate synthase gene sequences AB - Partial nucleotide sequences of the citrate synthase (gltA) gene from different rhizobia genera were determined. Tree topologies based on this housekeeping gene were similar to that obtained using 16S rRNA sequences. However gltA appeared to be more reliable at determining phylogenetic relationships of closely related taxa. We propose gltA sequences as an additional tool to be used in molecular phylogenetic studies MH - Germany MH - Mexico|Morelos PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0723-2020 UR - ISI:000225647700011 L2 - phylogeny;gltA;16S rRNA;GENOME SEQUENCE; MESORHIZOBIUM-LOTI; IDENTIFICATION; DIVERSITY; ALIGNMENT; SOFTWARE; TROPICI SO - Systematic and Applied Microbiology 2004 ;27(6):703-706 11108 UI - 3616 AU - Hernandez-Mendo O AU - Leaver JD AD - Colegio Postgrad, Montecillos, Texcoco, MexicoImperial Coll, Ashford, Kent, EnglandLeaver, JD, Royal Agr Coll, Cirencester GL7 6JS, Glos, England TI - Effect of replacing time available for grazing with time available for eating maize silage and soyabean meal on milk yield and feeding behaviour in dairy cows AB - Low rates of herbage dry matter (DM) intake impose limits on total daily DM intake in grazing dairy cows. The objective of this study was to increase total daily DM intake and milk production by restricting daily time available for grazing (TAG) and replacing it with time available for eating a maize silage/soyabean meal (TAMS) diet indoors. The treatments (TAG + TAMS) were 20 + 0, 19 + 1, 10 + 10 and 5 + 15 h. Measurements were made of milk production, intake and feeding behaviour. The interactions of TAG + TAMS treatments with sward height (SH) and concentrate level (CL) were also examined. Two experiments, each lasting 42 days, were carried out in spring (Experiment 1) and autumn (Experiment 2) using forty-eight and twenty-four Holstein-Friesian cows respectively. Treatments were arranged in a factorial design with TAG + TAMS treatments, SH (Experiment 1 only) and CL as the independent variables and a TAG + TAMS of 20 h. Reducing TAG and increasing TAMS significantly reduced estimated herbage DM intake and significantly increased maize silage/soyabean meal intake in both experiments, but there were no significant main effects of TAG + TAMS treatments on milk yield (mean, 27.4 and 25.5 kg d(-1) for Experiments 1 and 2 respectively), and yield of milk constituents. Increasing SH (Experiment 1) and CL (Experiments 1 and 2) significantly increased milk yield. In Experiment 1, there was a significant interaction between TAG + TAMS treatments and SH with the taller sward height of 8-10 cm and the 20 + 0 treatment having the highest milk yield (29.7 kg d(-1)) and the 5 + 15 treatment the lowest (27.2 kg d(-1)), whereas at the lower sward height of 4-6 cm, milk yield was lowest on the 20 + 0 treatment (25.5 kg d(-1)) with the other three treatments being higher (mean, 26.9 kg d(-1)). Replacing TAG with TAMS significantly increased liveweight gain in Experiment 1 but not in Experiment 2. Estimated rates of intake of herbage were lower in the autumn experiment (Experiment 2, 9.6 g DM min(-1)) than in the spring experiment (Experiment 1, 29.4 g DM min(-1)) but rates of intake of maize silage were higher in the autumn (112.4 g DM min(-1)) than in the spring (72.5 g DM min(-1)). In conclusion, in spring the response to replacing TAG with TAMS was dependent on sward conditions with the highest milk fat plus protein yield being on the 20 + 0 treatment at the high sward height and on the 19 + 1 treatment at the low sward height. The high liveweight gain of the 5 + 15 treatment could be an important means of restoring body condition in grazing lactating cows. In autumn, intakes of herbage were low in spite of its high estimated nutritive value with all treatments having a similar level of performance MH - United Kingdom MH - Mexico|Estado De Mexico PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0142-5242 UR - ISI:000225768900003 L2 - dairy cows;milk yield;feeding behaviour;grazing;maize silage;sward height;concentrate;SWARD SURFACE HEIGHT; CONCENTRATE SUPPLEMENTATION; HERBAGE INTAKE; FRIESIAN COWS; CLOVER SWARDS; GRASS; PASTURE; FORAGE; CATTLE; QUALITY SO - Grass and Forage Science 2004 ;59(4):318-330 11109 UI - 3915 AU - Hernandez-Ortiz V AU - Gomez-Anaya JA AU - Sanchez A AU - McPheron BA AU - Aluja M AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoPenn State Univ, Dept Entomol, University Pk, PA 16802, USAHernandez-Ortiz, V, Inst Ecol AC, Km 2-5 Carretera Antigua Coatepec 351,Apartado Po, Xalapa 91000, Veracruz, Mexico TI - Morphometric analysis of Mexican and South American populations of the Anastrepha fraterculus complex (Diptera : Tephritidae) and recognition of a distinct Mexican morphotype AB - Discriminant function and cluster analyses were performed on 19 morphometric variables of the aculeus, wing and mesonotum to determine whether populations of Anastrepha fraterculus (Wiedemann) from different parts of Mexico could be distinguished from populations from South America. Samples were collected from seven localities across Mexico, two from Brazil, and one each from Colombia and Argentina. Results showed there were statistically significant differences between Mexican and South American populations with respect to the aculeus (tip length, length of serrated section, mean number of teeth) and wing (width of S-band and connection between S- and V-bands). The degree of morphological variation observed among Mexican populations was extremely low, and as a consequence, the Mexican populations were identified as a single morphotype by discriminant analysis. The 'Andean morphotype' consisting of the Colombian population, and the 'Brazilian morphotype' consisting of the two Brazilian populations plus the single Argentinian population were also distinguished. It was concluded that the macro-geographical morphotypes from Mexico, Colombia, and Brazil plus Argentina correspond to three distinct taxonomic entities. Comparisons of results with those obtained from behavioural, karyotypic, isozyme and DNA studies suggest that sufficient evidence now exists to name a new Mexican species from within the A. fraterculus complex. This will be done in a separate publication. A provisional key to the morphotypes of A. fraterculus studied is provided MH - Mexico|Veracruz MH - USA PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 8 U4 - Entomology U5 - J;Article AV - English IS - 0007-4853 UR - ISI:000225065800002 L2 - BIOCHEMICAL SYSTEMATICS; HOST-PLANT SO - Bulletin of Entomological Research 2004 ;94(6):487-499 11110 UI - 6407 AU - Hernandez-Pando R AU - Aguilar D AU - Hernandez MLG AU - Orozco H AU - Rook G AD - Royal Free & Univ Coll Med Sch, Windeyer Inst Med Sci, Dept Med Microbiol, London W1P 6DB, EnglandInst Nacl Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Lab, Mexico City 14000, DF, MexicoRook, G, Royal Free & Univ Coll Med Sch, Windeyer Inst Med Sci, Dept Med Microbiol, 46 Cleveland St, London W1P 6DB, England TI - Pulmonary tuberculosis in BALB/c mice with nonfunctional IL-4 genes: changes in the inflammatory effects of TNF-alpha and in the regulation of fibrosis AB - In BALB/c mice, as in man, progressive pulmonary tuberculosis is accompanied by increasing expression of IL-4. Therefore we have used BALB/c mice with disrupted IL-4 genes (IL-4(-/-)) to investigate the role of IL-4 in pulmonary tuberculosis, with particular emphasis on the toxicity of TNF-alpha and on fibrosis, both of which are neglected aspects of human tuberculosis. Delayed-type hypersensitivity (DTH) sites in IL-4(+/+) mice were sensitive to the toxicity of locally injected TNF-alpha, whereas DTH sites in IL-4(-/-) mice were not. However, intravenous administration of IL-4 to IL-4(-/-) mice restored the sensitivity of the DTH sites to pro-inflammatory effects of TNF-alpha. In late disease, the lungs of IL-4+/+ mice expressed low IFN-gamma, but high TGF-beta and IL-4, correlating with fibrosis, detected as a high hydroxyproline content. In contrast, TGF-beta peaked 7 days after infection in the lungs of the IL-4(-/-) mice, and then fell to very low levels in the late disease, while IFN-gamma remained high. Accordingly, hydroxyproline content was reduced in infected IL-4(-/-) mice compared to IL-4(+/+) controls. In conclusion, the findings suggest that IL-4 has modestly detrimental effects on the antibacterial efficacy of the Th1 response, and larger effects on the toxicity of TNF-alpha, and on fibrosis MH - United Kingdom MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 26 U4 - Immunology U5 - J;Article AV - English IS - 0014-2980 UR - ISI:000188412400019 L2 - tuberculosis;IL-4;fibrosis;immunopathology;TNF-alpha;TUMOR-NECROSIS-FACTOR; MESSENGER-RNA STABILITY; CD8(+) T-CELLS; MYCOBACTERIUM-TUBERCULOSIS; INTERFERON-GAMMA; IN-VIVO; INFECTION; INTERLEUKIN-4; THALIDOMIDE; DISEASE SO - European Journal of Immunology 2004 ;34(1):174-183 11111 UI - 5736 AU - Hernandez-Pastora JL AU - Manko OV AU - Manko VS AU - Martin J AU - Ruiz E AD - Univ Salamanca, Area Fis Teor, E-37008 Salamanca, SpainUniv Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 9EW, EnglandMoscow MV Lomonosov State Univ, Dept Quantum Stat & Field Theory, Moscow 119899, RussiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoHernandez-Pastora, JL, Univ Salamanca, Area Fis Teor, E-37008 Salamanca, Spain TI - Equilibrium states in the quadruple-Kerr solution AB - The extended quadruple-Kerr metric is used to consider equilibrium states of four collinear Kerr particles. We explain our previous failure to solve numerically the full set of the balance equations, and we derive a self-consistent system of the axis conditions leading to the equilibrium of all four constituents which can be black holes or hyper-extreme objects. The equilibrium configurations obtained in this paper exhibit similar features with those occurring in the systems of two Kerr particles, for instance, the balance of four Kerr black holes with positive masses does not seem possible. Equilibrium states of two identical compound Kerr objects are also discussed MH - United Kingdom MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0001-7701 UR - ISI:000189138900009 L2 - Ernst potential;Kerr metric;equilibrium states;EXTENDED MULTISOLITON SOLUTIONS; EINSTEIN FIELD-EQUATIONS; GENERAL RELATIVITY; BLACK-HOLES; SUPERPOSITION SO - General Relativity and Gravitation 2004 ;36(4):781-797 11112 UI - 5865 AU - Hernandez-Torres I AU - Iracheta M AU - Galan-Wong LJ AU - Hernandez C AU - Contreras J AU - Jackson M AU - Pereyra-Alferez B AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Immunol, Mexico City, DF, MexicoARS, USDA, Peoria, IL, USAPereyra-Alferez, B, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Immunol, Mexico City, DF, Mexico TI - A Paecilomyces fumosoroseus mutant over-producing chitinase displays enhanced virulence against Bemisia tabaci AB - A Paecilomyces fumosoroseus strain was mutagenized by u.v. Among 200 colonies, one mutant (M84), showed a large and stable chitin hydrolysis-halo. Glucose consumption and biomass production were similar for M84 and the parental strain. Chitinase was inducible by chitin and repressed by glucose in both strains but, when they were grown on minimal medium plus colloidal chitin as sole carbon source, the parental and M84 strains yielded 198 and 690 mumol N-acetylglucosamine, respectively. This results indicate that the mutant strain synthesized a chitinase with a higher activity. Bioassays against Bemisia tabaci nymph, showed that M84 incited a 2-fold higher incidence of disease compared to the parental strain MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0959-3993 UR - ISI:000220455100013 L2 - Bemisia tabaci;biological control;chitinases;Paecilomyces fumosoroseus;pest;whitefly;BEAUVERIA-BASSIANA; ENTOMOPATHOGENIC FUNGUS; METARHIZIUM-ANISOPLIAE; ARGENTIFOLII; CUTICLE; ENZYME SO - World Journal of Microbiology & Biotechnology 2004 ;20(2):207-210 11113 UI - 6179 AU - Hernandez G AU - Olmos J AD - Biotecnol Marina, San Diego, CA 92143, USACICESE, Dept Marine Biotechnol, Mol Microbiol Lab, Ensenada, Baja California, MexicoOlmos, J, Biotecnol Marina, POB 434844, San Diego, CA 92143, USA TI - Molecular identification of pathogenic and nonpathogenic strains of Vibrio harveyi using PCR and RAPD AB - Fifteen environmental samples of Vibrio spp. isolated from healthy and diseased shrimps were tested for pathogenicity to juvenile shrimps. Two isolates, strains Z2 and Z3, were observed to be pathogenic, causing 100% mortality of the target host compared to the control strain Vibrio harveyi ATCC 14126. Environmental and type strains were subjected to molecular characterization by restriction fragment length polymorphism (RFLP) and PCR using primers targeted to different virulence, transcriptional regulator, or quorum sensing genes from V. harveyi. Primers designed for luxN were specific and identified all the environmental strains as V. harveyi. The random amplified polymorphic DNA (RAPD) method was used to differentiate between pathogenic and nonpathogenic strains of V. harveyi. These methodologies allowed us to detect and distinguish strains virulent and avirulent to juvenile shrimp MH - Mexico|Baja California MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0175-7598 UR - ISI:000189195300015 L2 - PENAEUS-MONODON LARVAE; LITOPENAEUS-VANNAMEI; LUMINOUS BACTERIA; MARINE; GENES; SHRIMP; LUMINESCENCE; INFECTION; VIRULENT; FAMILY SO - Applied Microbiology and Biotechnology 2004 ;63(6):722-727 11114 UI - 5763 AU - Hernandez JFG AU - Tanis PJ AU - Deurloo EE AU - Nieweg OE AU - Rutgers EJT AU - Kroon BBR AU - Olmos RAV AD - Netherlands Canc Inst, Dept Nucl Med, NL-1066 CX Amsterdam, NetherlandsIMSS, CMN, Hosp Oncol, Dept Breast Tumours, Mexico City, DF, MexicoNetherlands Canc Inst, Dept Surg, NL-1066 CX Amsterdam, NetherlandsNetherlands Canc Inst, Dept Radiol, NL-1066 CX Amsterdam, NetherlandsOlmos, RAV, Netherlands Canc Inst, Dept Nucl Med, Plesmanlaan 121, NL-1066 CX Amsterdam, Netherlands TI - Radio-guided surgery improves outcome of therapeutic excision in non-palpable invasive breast cancer AB - Intratumoral injection of a radiocolloid for lymphatic mapping enables the therapeutic excision of clinically occult breast cancer with the aid of a gamma-ray detection probe. The aim of this study was to determine the success rate of radio-guided tumour excision in addition to a guide wire and to identify factors predicting clear margins. Sixty-five consecutive patients underwent radio-guided tumour excision after intratumoral injection of Tc-99m-nanocolloid guided by ultrasound or stereotaxis. A localization wire was inserted after scintigraphy had been performed (group 1). The results were compared with retrospective data from 67 consecutive patients who underwent therapeutic wire-directed excision alone (group 2). Factors predicting clear margins (greater than or equal to1 mm) were determined in a logistic regression model. Adequate margins were obtained in 83% of group 1 and in 64% of group 2 (P=0.014). The invasive component was incompletely excised in two patients in group 1 and in 14 patients in group 2. Further surgery was performed in four patients in group 1 and in 14 patients in group 2. Factors predictive of clear margins were decreasing pathological tumour diameter (P=0.035), increasing weight of the specimen (P=0.046), absence of microcalcifications (P=0.004) and absence of carcinoma in situ component (P=0.024). Radio-guided excision was an independent predictor of complete excision of the invasive component (P=0.012). The application of radio-guided surgery combined with wire localization seems to improve the outcome of therapeutic excision of non-palpable invasive breast cancer compared with wire-directed excision alone MH - Mexico|Distrito Federal MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0143-3636 UR - ISI:000220805600003 L2 - breast cancer;non-palpable tumour;radio-guided surgery;WIRE LOCALIZATION BIOPSY; RESIDUAL DISEASE; LESIONS; IMPACT; MANAGEMENT; LUMPECTOMY; DIAGNOSIS; CARCINOMA; MARGINS; EXTENT SO - Nuclear Medicine Communications 2004 ;25(3):227-232 11115 UI - 4758 AU - Hernandez M AU - Buckle F AU - Guisado C AU - Baron B AU - Estavillo N AD - CICESE, Dept Acuicultura, Lab Ecofisiol, Ensenada, Baja California, MexicoUniv Catolica Norte, Fac Ciencias Mar, Dept Biol Marina, Vina Del Mar, ChileUniv Vina del Mar, Vina Del Mar, ChileHernandez, M, Ctr Invest Cient & Educ Super Ensenada, Dept Aquacultura, Lab Ecofisiol, POB 434844, San Diego, CA 92143 USA TI - Critical thermal maximum and osmotic pressure of the red sea urchin Strongylocentrotus franciscanus acclimated at different temperatures AB - 1. The sea urchin Strongylocentrotus franciscanus acclimated at 15degreesC, 18degreesC and 21degreesC exposed to a rising thermal stress showed a series of-well-defined responses. 2. All responses were significantly different and stage E4, characterized when the sea urchins ceased moving, relaxed the large spines but the smaller spines continued to make small movements. This was considered to be the critical thermal maximum (CTMax). 3. The resistance of S. franciscanus is independent of the acclimation interval used in this work. 4. The effect of the CTMax on the osmotic pressure of the sea urchin body fluid acclimated at 18degreesC was significantly different (P<0.05) when compare to the 15degreesC and 21degreesC conditions. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Chile MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biology;Zoology U5 - J;Article AV - English IS - 0306-4565 UR - ISI:000223086900005 L2 - critical thermal maximum;osmotic pressure;Strongylocentrotus franciscanus;acclimation;FISHES SO - Journal of Thermal Biology 2004 ;29(4-5):231-236 11116 UI - 4606 AU - Hernandez MA AU - Galliano F AU - Landolt D AD - Ecole Polytech Fed Lausanne, Inst Mat, Dept Mat, Lab Met Chim, CH-1015 Lausanne, SwitzerlandUniv Nacl Autonoma Mexico, Fac Quim, Dept Met, Mexico City, DF, MexicoGalliano, F, Ecole Polytech Fed Lausanne, Inst Mat, Dept Mat, Lab Met Chim, CH-1015 Lausanne, Switzerland TI - Mechanism of cathodic delamination control of zinc-aluminum phosphate pigment in waterborne coatings AB - The propagation of the cathodic delamination and blistering was studied for different waterborne paint systems, with or without the zinc aluminum phosphate (ZAP) pigment. The mechanism by which ZAP reacts at the metal-coating interface to improve coating performance against cathodic delamination and blister formation was investigated by means of scanning acoustic microscopy (SAM), pull-off test and surface analysis. The presence of the pigment clearly enhanced the adhesion and delamination resistance of the coating upon immersion. It has been evidenced how the pH buffer properties of the ZAP pigment play an important role in reducing the advancement of the delamination front. A compact film constituted of zinc and sodium phosphates was found, on the substrate surface, solely within the delaminated area. The precipitation of this phosphate layer on the cathodic sites is thought to polarize the cathodic reaction, contributing to slowing down the delamination reaction. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Switzerland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000223522100013 L2 - organic coatings;SAM;XPS;AES;ORGANIC COATINGS; CORROSION PROTECTION; ANTICORROSIVE PIGMENTS; ACOUSTIC MICROSCOPY; STEEL; SURFACE; PERFORMANCE; SPECTROSCOPY; INTERFACE; MODEL SO - Corrosion Science 2004 ;46(9):2281-2300 11117 UI - 3954 AU - Hernandez MT AU - Lemp GF AU - Castaneda X AU - Sanchez MA AU - Aoki BK AU - Tapia-Conyer R AU - Drake MV AD - Univ Calif, Univ Wide AIDS Res Program, Off President, Oakland, CA 94612, USAUniv Calif Berkeley, Off President, Berkeley, CA, USASecretaria Salud Mexico, Mexico City, DF, MexicoSanchez, MA, Univ Calif, Univ Wide AIDS Res Program, Off President, 300 Lakeside Dr,6th Floor, Oakland, CA 94612 USA TI - HIV/AIDS among Mexican migrants and recent immigrants in California and Mexico MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Immunology;Infectious Diseases U5 - J;Editorial Material AV - English IS - 1525-4135 UR - ISI:000224911600001 SO - Jaids-Journal of Acquired Immune Deficiency Syndromes 2004 ;37():S203-S203 11118 UI - 4961 AU - Hernandez OH AU - Vogel-Sprott M AU - Huchin-Ramirez TC AU - Sosa-Lopez A AD - Univ Autonoma Campeche, Ctr Inv Enf Trop, Campeche, MexicoUniv Waterloo, Waterloo, ON N2L 3G1, Canada TI - Omitted stimulus reaction time task: A new method with a potential usefulness in the alcohol field MH - Canada MH - Mexico|Campeche PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Substance Abuse U5 - J;Meeting Abstract AV - English IS - 0145-6008 UR - ISI:000221549300796 SO - Alcoholism-Clinical and Experimental Research 2004 ;28(5):139A-139A 11119 UI - 4135 AU - Hernandez OM AU - Platzeck MI AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Nacl Sur, Dept Matemat, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaHernandez, OM, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Configurations of trivial extensions of Dynkin type A(n) AB - Let A be a trivial extension of Cartan class A(n). We find a combinatorial algorithm giving the configurations of ZA(n) associated to A. (C) 2004 Elsevier Inc. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000224441800010 L2 - ALGEBRAS SO - Journal of Algebra 2004 ;281(1):167-199 11120 UI - 5308 AU - Hernandez PV AU - Olvera-Novoa MA AU - Rouse DB AD - Inst Tecnol Mar 1, Boca Del Rio 94290, Veracruz, MexicoIPN, Ctr Invest & Estud Avanzados, Unidad Merida, Merida 97310, Yucatan, VenezuelaAuburn Univ, Dept Fisheries & Allied Aquacultures, Auburn, AL 36849, USAHernandez, PV, Inst Tecnol Mar 1, Carr Veracruz Cordoba Km 12,AP 68, Boca Del Rio 94290, Veracruz, Mexico TI - Effect of dietary cholesterol on growth and survival of juvenile redclaw crayfish Cherax quadricarinatus under laboratory conditions AB - The effect of dietary cholesterol level on growth and survival of juvenile redclaw crayfish Cherax quadricarinatus was evaluated over a 10-week culture period. Five isoenergetic (430 kcal/100 g) and isonitrogenous (30% protein) diets, supplemented with 0%, 0.25%, 0.50%, 0.75% and 1.00% cholesterol were evaluated. Juvenile redclaw crayfish (0.06 +/- 0.02 g) were individually housed in plastic cages in 15-l, low case tanks in a climate-controlled laboratory, using a semiclosed recirculation system. Water temperature was maintained at 28 +/- 0.5 degreesC. Redclaw crayfish fed with 0.50% cholesterol diet had significantly higher weight gain than those from the other four treatments. Redclaw crayfish fed with diets without cholesterol supplementation had the lowest growth. Survival ranged from 90% to 100% and was not significantly different among treatments. The recommended dietary cholesterol level for optimum growth under these environmental conditions was 0.50%. (C) 2003 Published by Elsevier B.V MH - Mexico|Veracruz MH - USA MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000221946500032 L2 - Cherax quadricarinatus;cholesterol requirement;redclaw;STEROL REQUIREMENT; PENAEUS-MONODON; LECITHIN SO - Aquaculture 2004 ;236(1-4):405-411 11121 UI - 4643 AU - Hernandez S AU - Gonzalez GM AU - McCarthy DI AU - Colombo AL AU - Najvar LK AU - Bocanegera R AU - Graybill JR AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis, San Antonio, TX 78229, USAUniv Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78229, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, MexicoUniv Fed Sao Paulo, Div Infect Dis, Sao Paulo, BrazilHernandez, S, Univ Texas, Hlth Sci Ctr, Dept Med, Div Infect Dis 7881, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Alternatives to amphotericin B for Candida rugosa infection AB - Objective: Amphotericin B failure is frequently seen in patients with candidaemia caused by Candida rugosa. We evaluated amphotericin 13, fluconazole, posaconazole and voriconazole as alternative treatments against infection in mice with two isolates of C. rugosa. Methods: Neutropenic mice were inoculated intravenously with C. rugosa. Amphotericin 13, fluconazole, posaconazole and voriconazole were administered for 7 days after infection. Efficacy of the antifungal treatment was assessed by survival and tissue burden of C. rugosa. Results: All of the four drugs significantly prolonged survival over controls. With both isolates, kidney counts were reduced significantly below controls for amphotericin B, fluconazole and posaconazole. However, voriconazole was less effective than the other antifungals. Conclusion: Despite poor clinical response to amphotericin B, in vivo data indicate that amphotericin B increases organ clearance and survival over untreated controls. However, although voriconazole improved survival over controls, increased tissue clearance was not seen. This discrepancy may be caused by rapid clearance of voriconazole in mice. These studies suggest fluconazole, posaconazole or voriconazole may be useful alternatives to amphotericin B in therapy of C. rugosa infection MH - Brazil MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0305-7453 UR - ISI:000223372100030 L2 - murine model;antifungals;C. rugosa;SUSCEPTIBILITY; ALBICANS; FUNGEMIA SO - Journal of Antimicrobial Chemotherapy 2004 ;54(2):477-480 11122 UI - 4436 AU - Hernandez X AU - Matos T AU - Sussman RA AU - Verbin Y AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoOpen Univ Israel, Dept Nat Sci, IL-61392 Tel Aviv, IsraelHernandez, X, Univ Nacl Autonoma Mexico, Inst Astron, Apdo 70-267,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Scalar field "mini-MACHOs": A new explanation for galactic dark matter AB - We examine the possibility that galactic halos are collisionless ensembles of scalar field "massive compact halo objects" (MACHOs). Using mass constraints from MACHO microlensing and from theoretical arguments on halos made up of massive black holes, as well as demanding also that scalar MACHO ensembles of all scales do not exhibit gravothermal instability (as required by consistency with observations of LSB galaxies), we obtain the range: mless than or similar to10(-7)M or 30Mless than or similar tomless than or similar to100M. The rather narrow mass range of large MACHOs seems to indicate that the ensembles we are suggesting should be probably made up of scalar MACHOs in the low mass range ("mini-MACHOs"). The proposed model allows one to consider a nonbaryonic and nonthermal fundamental nature of dark matter, while at the same time keeping the same phenomenology of the CDM paradigm MH - Israel MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000223859700058 L2 - MASSIVE BLACK-HOLES; SURFACE BRIGHTNESS GALAXIES; PHASE-SPACE DENSITIES; BOSON STARS; COSMOLOGICAL CONSTANT; AXION MINICLUSTERS; GLOBULAR-CLUSTERS; HALO; LIMITS; OSCILLATONS SO - Physical Review D 2004 ;70(4): 11123 UI - 4619 AU - Herre A AU - Siebe C AU - Kaupenjohann M AD - TU Berlin, Inst Okol, D-10587 Berlin, GermanyNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoHerre, A, TU Berlin, Inst Okol, Salzufer 11-12, D-10587 Berlin, Germany TI - Effect of irrigation water quality on organic matter, Cd and Cu mobility in soils of central Mexico AB - Untreated wastewater has been used for irrigation since 1912 at the Irrigation District 03, Central Mexico. Accumulated heavy metals are dominantly bound to the organic soil fraction. In a field study we evaluated the effect of wastewater irrigation on the quality of soil organic matter and the amount of water extractable Cu and Cd. In a column experiment we tested if water treatment affects the leaching of both metals and dissolved organic carbon (DOC) out of soils that have been irrigated for more than 90 years with untreated wastewater. The field study shows that long term irrigation increases the mineralizable carbon fraction and the DOC concentrations. The water extractable Cu and Cd concentrations also increase and correlate with DOC. In the column leachates the CU concentrations also correlate with DOC, the Cd concentrations correlate with the sum of cations, chloride and DOC concentrations. Water treatment reduced Cd leaching, but it did have no substantial effect on Cu leaching MH - Germany MH - Mexico|Distrito Federal PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000223394900038 L2 - carbon mineralization;dissolved organic carbon;heavy metals;lixiviation;wastewater;HEAVY-METALS; COMPLEXATION; DEPENDENCE; ACIDS SO - Water Science and Technology 2004 ;50(2):277-284 11124 UI - 4226 AU - Herrera-Aguilar A AD - Univ Thessaloniki, Dept Theoret Phys, Thessaloniki 54124, GreeceUMSNH, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoHerrera-Aguilar, A, Univ Thessaloniki, Dept Theoret Phys, Thessaloniki 54124, Greece TI - Charging interacting rotating black holes in heterotic string theory AB - We present a formulation of the stationary bosonic string sector of the whole toroidally compactified effective field theory of the heterotic string as a double Ernst system which, in the framework of general relativity describes, in particular, a pair of interacting spinning black holes; however, in the framework of low-energy string theory the double Ernst system can in particular be interpreted as the rotating field configuration of two interacting sources of black hole type coupled to dilaton and Kalb-Ramond fields. We clarify the rotating character of the B-tphi-component of the antisymmetric tenser field of Kalb-Ramond and discuss on its possible torsion nature. We also recall the fact that the double Ernst system possesses a discrete symmetry which is used to relate physically different string vacua. Therefore we apply the normalized Harrison transformation (a charging symmetry which acts on the target space of the low-energy heterotic string theory preserving the asymptotics of the transformed fields and endowing them with multiple electromagnetic charges) on a generic solution of the double Ernst system and compute the generated field configurations for the 4-D effective field theory of the heterotic string. This transformation generates the U(1)(n) vector field content of the whole low-energy heterotic string spectrum and gives rise to a pair of interacting rotating black holes endowed with dilaton, Kalb-Ramond and multiple electromagnetic fields where the charge vectors are orthogonal to each other MH - Greece MH - Mexico|Michoacan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0217-7323 UR - ISI:000224161900006 L2 - interacting black holes;low-energy heterotic string theory;nonlinear Harrison transformation;EINSTEIN-MAXWELL EQUATIONS; SYMMETRY AXIS; FIELD-EQUATIONS; EQUILIBRIUM; TRANSFORMATION; SUPERPOSITION; DUALITIES SO - Modern Physics Letters A 2004 ;19(30):2299-2315 11125 UI - 5173 AU - Herrera-Aguilar A AU - Mora-Luna RR AD - Aristotle Univ Thessaloniki, Dept Theoret Phys, GR-54006 Thessaloniki, GreeceUMSNH, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUMSNH, Escuela Ciencias Fisicomatemat, Morelia 58040, Michoacan, MexicoHerrera-Aguilar, A, Aristotle Univ Thessaloniki, Dept Theoret Phys, GR-54006 Thessaloniki, Greece TI - Inverse scattering method, Lie-Backlund transformations, and solitons for low-energy effective field equations of 5D string theory AB - In the framework of the 5D low-energy effective field theory of the heterotic string with no vector fields excited, we combine two nonlinear methods in order to construct a solitonic field configuration. We first apply the inverse scattering method on a trivial vacuum solution and obtain a stationary axisymmetric two-soliton configuration consisting of a massless gravitational field coupled to a nontrivial chargeless dilaton and to an axion field endowed with charge. The implementation of this method was done following a scheme previously proposed by Yurova. We also show that within this scheme it is not possible to get massive gravitational solitons at all. We then apply a nonlinear Lie-Backlund matrix transformation of Ehlers type on this massless solution and get a massive rotating axisymmetric gravitational soliton coupled to axion and dilaton fields endowed with charges. We study as well some physical properties of the constructed massless and massive solitons and discuss the effect of the generalized solution generating technique on the seed solution and its further generalizations MH - Greece MH - Mexico|Michoacan PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000222096200072 L2 - DILATON-AXION GRAVITY; SPINNING BLACK-HOLES; DESITTER SPACETIME; FORMULATION SO - Physical Review D 2004 ;69(10): 11126 UI - 6061 AU - Herrera-Aguilar A AU - Nowakowski M AD - Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Los Andes, Dept Fis, Bogota, ColombiaHerrera-Aguilar, A, Univ Michoacana San Nicolas Hidalgo, Inst Fis & Matemat, Edificio C-3,Ciudad Univ, Morelia 58040, Michoacan, Mexico TI - Charged dual string vacua from interacting rotating black holes via discrete and nonlinear symmetries AB - Using the stationary formulation of the toroidally compactified heterotic string theory in terms of a pair of matrix Ernst potentials we consider the four-dimensional truncation of this theory with no U(1) vector fields excited. Imposing one timelike Killing vector permits us to express the stationary effective action as a model in which gravity is coupled to a matrix Ernst potential which, under certain parametrization, allows us to interpret the matter sector of this theory as a double Ernst system. We generate a web of string vacua which are related to each other via a set of discrete symmetries of the effective action (some of them involve S-duality transformations and possess non-perturbative character). Some physical implications of these discrete symmetries are analysed and we find that, in some particular cases, they relate rotating black holes coupled to a dilaton with no Kalb-Ramond field, static black holes with non-trivial dilaton and antisymmetric tensor fields, and rotating and static naked singularities. Further, by applying a nonlinear symmetry, namely, the so-called normalized Harrison transformation, on the seed field configurations corresponding to these neutral backgrounds, we recover the U(1)(n) Abelian vector sector of the four-dimensional action of the heterotic string, charging in this way the double Ernst system which corresponds to each one of the neutral string vacua, i.e., the stationary and the static black holes and the naked singularities MH - Colombia MH - Mexico|Michoacan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000220124500025 L2 - WEAK-COUPLING DUALITY; TARGET-SPACE DUALITY; DILATON-AXION; FIELD-EQUATIONS; EQUILIBRIUM; DIMENSIONS; MODELS SO - Classical and Quantum Gravity 2004 ;21(4):1015-1030 11127 UI - 3188 AU - Herrera-Campos MDA AU - Colin PM AU - Pena AB AU - Lucking R AD - Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, MexicoField Museum Nat Hist, Dept Bot, Chicago, IL 60605, USAHerrera-Campos, MDA, Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Apartado Postal 70-223, Mexico City 04510, DF, Mexico TI - The Foliicolous Lichen Flora of Mexico. III. New species from Volcan San Martin Tuxtla (Sierra de Los Tuxtlas), Veracruz, with notes on Fellhanera santessonii AB - Collections of foliicolous lichenized Ascomycota made along a transect leading up the summit of San Martin Tuxtla Volcano in the State of Veracruz in Mexico revealed an unexpectedly high number of eleven species new to science: Gyalectidium cinereodiscus HERRERA-CAMPOS & LOCKING and G. sanmartinense HERRERA-CAMPOS & LOCKING (Gomphillaceae), Byssolecania subvezdae LOCKING, Fellhanera atrofuscatula HERRERA-CAMPOS & LOCKING, F obscurata HERRERA-CAMPOs & LOCKING, and F rubrolecanorina B. PE (N) over tildeA & COLIN (Pilocarpaceae), Porina subnitidula COLIN & B. PE (N) over tildeA and Trichothelium intermedium LOCKING (Porinaceae), and Psoroglaena arachnoidea HERRERA-CAMPOS & LOCKING, R ornata HERRERA-CAMPOS & LOCKING, and R sorediata HERRERA-CAMPOS & LOCKING (Verrucariaceae). All species are described herein, and their diagnostic characters and taxonomic affinities are discussed. We also describe for the first time the pycnidia and conidia of Fellhanera santessonii BARILLAS & LOCKING, their features confirming the placement of this species in the F fuscatula group MH - Mexico|Distrito Federal MH - USA PB - HORN: FERDINAND BERGER SOEHNE RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 0079-2047 UR - ISI:000226932100001 L2 - lichenized Ascomycota;Byssolecania;Fellhanera;Gyalectidium;Porina;Psoroglaena;Trichothelium;taxonomy;Flora of Mexico SO - Phyton-Annales Rei Botanicae 2004 ;44(2):167-183 11128 UI - 3769 AU - Herrera-Guzman I AU - Pena-Casanova J AU - Lara JP AU - Gudayol-Ferre E AU - Bohm P AD - Hosp Mar, IMAS, Behav Neurol Sect, Dept Neurol, Barcelona 08003, SpainUMSNH, Sch Psychol, Michoacana, MexicoUniv Malaga, Ctr Invest Medicosanitarias, Unit Human Neurophysiol, E-29071 Malaga, SpainPena-Casanova, J, Hosp Mar, IMAS, Behav Neurol Sect, Dept Neurol, Passeig Maritim 25-29, Barcelona 08003, Spain TI - Influence of age, sex, and education on the visual object and space perception battery (VOSP) in a healthy normal elderly population AB - The assessment of visual perception and cognition forms an important part of any general cognitive evaluation. We have studied the possible influence of age, sex, and education on a normal elderly Spanish population (90 healthy subjects) in performance in visual perception tasks. To evaluate visual perception and cognition, we have used the subjects performance with The Visual Object and Space Perception Battery (VOSP). The test consists of 8 subtests: 4 measure visual object perception (Incomplete Letters, Silhouettes, Object Decision, and Progressive Silhouettes) while the other 4 measure visual space perception (Dot Counting, Position Discrimination, Number Location, and Cube Analysis). The statistical procedures employed were either simple or multiple linear regression analyses (subtests with normal distribution) and Mann-Whitney tests, followed by ANOVA with Scheffe correction (subtests without normal distribution). Age and sex were found to be significant modifying factors in the Silhouettes, Object Decision, Progressive Silhouettes, Position Discrimination, and Cube Analysis subtests. Educational level was found to be a significant predictor of function for the Silhouettes and Object Decision subtests. The results of the sample were adjusted in line with the differences observed. Our study also offers preliminary normative data for the administration of the VOSP to an elderly Spanish population. The results are discussed and compared with similar studies performed in different cultural backgrounds MH - Mexico|Michoacan MH - Spain PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Clinical;Clinical Neurology;Psychology U5 - J;Article AV - English IS - 0920-1637 UR - ISI:000225437100005 L2 - MINI-MENTAL STATE; LEARNING TEST; RECOGNITION; PERFORMANCE; VALIDITY; OLDER SO - Clinical Neuropsychologist 2004 ;18(3):385-394 11129 UI - 2781 AU - Herrera-Silvera JA AU - Comin FA AU - randa-Cirerol N AU - Troccoli L AU - Capurro L AD - CINVESTAV, IPN, Dept Marine Resources, Unidad Merida, Merida 97310, Yucatan, MexicoCSIC, Inst Pirenaico Ecol, Zaragoza, SpainUniv Oriente, Cumana, VenezuelaHerrera-Silvera, JA, CINVESTAV, IPN, Dept Marine Resources, Unidad Merida, Carretera Antigua Progreso Km 6, Merida 97310, Yucatan, Mexico TI - Coastal water quality assessment in the Yucatan Peninsula: management implications AB - The coastal zone of Yucatan Peninsula has been recognized as the most important environment to the economic development of this region. Different projects have been conducted in this area, including harbors, tourist, commercial, and aquaculture infrastructure, among others. However, there is no information available on what are "normal" concentrations of dissolved inorganic nutrients (DIN) and chlorophyll-a (Chl-a) for these regions. In order to establish the base-lines of selected water quality parameters four coastal areas of the north of Yucatan Peninsula (SE, Mexico) a monitoring program has been conducted since 1999 in four localities of the north of Yucatan which show differences on the kind and intensity of anthropogenic impacts. The results show that Dzilam is the site with the best water quality conditions and a conservation program must be implemented, while Sisal and Progreso are the ports with the worst water quality and where different strategies must be implemented, such as water management of the shrimp farm effluents through constructed wetlands in Sisal, or water waste treatment and facilitation of water circulation in the Progreso port. Other results from phytoplankton community and submerged aquatic vegetation indicate that these components must be incorporated into water quality programs in order to effectively identify the problems and monitor the success of management strategies. These results can be used to understand the linkages between stressors from the activities and attributes of the water quality. A joint state-federal and academic effort to improve the conditions and increase the sustainability of the coastal zone is favored. (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Yucatan MH - Spain MH - Venezuela PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000227621600005 L2 - FLORIDA; BAY; EUTROPHICATION SO - Ocean & Coastal Management 2004 ;47(11-12):625-639 11130 UI - 6211 AU - Herrera A AU - Tellez-Luis SJ AU - Gonzalez-Cabriales JJ AU - Ramirez JA AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Anal, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Dept Quim Anal, Area Tecnol Alimentos, Campus Lugo, Lugo 27002, Spain TI - Effect of the hydrochloric acid concentration on the hydrolysis of sorghum straw at atmospheric pressure AB - Sorghum straw is a raw material useful for the xylose production by hydrolysis. The main application of xylose is its bioconversion to xylitol, a functional sweetener with important technological properties. The objective of this work was to study the hydrolysis of sorghum straw with hydrochloric acid at 100 degreesC. Several concentrations of HCl (2-6%) and reaction time (0-300 min) were evaluated. Kinetic parameters of mathematical models for predicting the concentration of xylose, glucose, acetic acid and furfural in the hydrolysates were found and used to optimise the process and compared with results reported in the literature using other conditions and acids. Optimal conditions found for hydrolysis were 6% HCl at 100 degreesC for 83 min, which yielded a solution with 21.3 g xylose/l, 4.7 g glucose/l, 0.8 g furfural/l and 2.8 g acetic acid/l. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000188954200014 L2 - xylose;sorghum;straw;modelling;acid hydrolysis;PINUS-PINASTER WOOD; HEMICELLULOSIC FRACTION; PREHYDROLYSIS; TECHNOLOGY; KINETICS; XYLITOL; ETHANOL SO - Journal of Food Engineering 2004 ;63(1):103-109 11131 UI - 5718 AU - Herrera J AU - Maza MA AU - Minzoni AA AU - Smyth NF AU - Worthy AL AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 01000, DF, MexicoUniv Nacl Autonoma Mexico, IIMAS, Dept Math & Mech, FENOMEC, Mexico City 01000, DF, MexicoUniv Edinburgh, Sch Math, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Wollongong, Sch Math & Appl Stat, Wollongong, NSW 2522, AustraliaSmyth, NF, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo 70-543, Mexico City 01000, DF, Mexico TI - Davydov soliton evolution in temperature gradients driven by hyperbolic waves AB - In the present work the evolution of a Davydov soliton in an inhomogeneous medium will be considered. The Zakharov system of equations, which describes this soliton, consists of a perturbed non-linear Schrodinger (NLS) type equation plus a forced. wave equation. This system is not exactly integrable for a homogeneous medium and its Lagrangian is non-local. It has recently been shown that this type of soliton has a long enough lifetime, even for non-zero temperature, so as to be a possible mechanism for the transfer of energy along an a helix. In the present work, the effect of temperature inhomogeneities on the behaviour of this soliton will be studied. As the soliton propagates through such an inhomogeneity, both dispersive and non-dispersive waves are generated. The stability of the soliton to this radiation is studied. The evolution of the Davydov soliton solution of the Zakharov equations in an inhomogeneous medium will be studied using an approximate method based on averaged conservation laws, which results in ordinary differential equations for the pulse parameters. It is shown that the inclusion of the effect of the dispersive radiation shed by the soliton for the NLS equation and the non-dispersive (hyperbolic) radiation shed by the soliton for the forced wave equation is vital for an accurate description of the evolution of the Davydov soliton. It is found that the soliton is stable even in the presence of hyperbolic radiation and that the temperature gradients have significant effects on the propagation of the soliton, even to the extent of reversing its motion. (C) 2003 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000220760200008 L2 - soliton;hyperbolic;Davydov soliton;stability;RADIATION SO - Physica D-Nonlinear Phenomena 2004 ;191(1-2):156-177 11132 UI - 6080 AU - Herrmann E AU - Luca F AU - Walsh PG AD - Univ Saarland, FR Math 6 1, D-66041 Saarbrucken, GermanyUNAM, Inst Matemat, Morelia, Michoacan, MexicoUniv Ottawa, Dept Math, Ottawa, ON K1N 6N5, CanadaHerrmann, E, Univ Saarland, FR Math 6 1, Postfach 151150, D-66041 Saarbrucken, Germany TI - A note on the Ramanujan-Nagell equation AB - In the present paper we determine all positive integer solutions to the equation x(2) + 7y(4) = k, where k is a positive integer divisible only by primes less than 12 MH - Canada MH - Germany MH - Mexico|Michoacan PB - DEBRECEN: KOSSUTH LAJOS TUDOMANYEGYETEM RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0033-3883 UR - ISI:000189385700003 L2 - cubic and quartic equations;fibonacci and lucas numbers and;polynomials and generalizations SO - Publicationes Mathematicae-Debrecen 2004 ;64(1-2):21-30 11133 UI - 3429 AU - Hess PO AU - Algora A AU - Cseh J AU - Draayer JP AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoHungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, HungaryLouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAHess, PO, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Parametrization of SU(3) spectroscopic factors for light nuclei within an algebraic model AB - A parametrization of SU(3) shell-model spectroscopic factors for light nuclei is proposed. It is shown that spectroscopic factors, as calculated from first principles, can be reproduced nearly perfectly, including taking full account of the Pauli principle, without recurring to sophisticated microscopic procedures. The results show that microscopic spectroscopic factors follow a surprisingly simple pattern MH - Hungary MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000226161000003 L2 - CLEBSCH-GORDAN-COEFFICIENTS; D SHELL NUCLEI; CLUSTER MODEL; RACAH COEFFICIENTS; ALLOWED STATES; VIBRON MODEL; SO(3) BASES; ALPHA; AMPLITUDES; PROGRAMS SO - Physical Review C 2004 ;70(5): 11134 UI - 4743 AU - Hess PO AU - Misicu S AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoNatl Inst Nucl Phys, Bucharest, RomaniaMisicu, S, UNAM, Inst Ciencias Nucl, Circuito Exterior,CU,A-P 70-543, Mexico City 04510, DF, Mexico TI - Spectroscopic factors of cluster decays in an algebraic cluster model AB - We propose a new ansatz for the cluster spectroscopic factor in an algebraic cluster model. The parameters of the ansatz are fitted to the experimental and Blendowske-Walliser values of the spectroscopic factor for light emitted clusters and then applied to predict the spectroscopic factors for heavier clusters up to the spontaneous cold fission in two equal fragments. We show that due to the cluster and daughter shell structure, the calculated spectroscopic factors are strongly deviating from the empirical law for increasing cluster number. The observed gap between the alpha-like and cluster-like fission on one side and the spontaneous cold fission on the other side for actinides is explained by the moderate increase of spectroscopic factors, as computed in the present Letter, combined with the simultaneous decrease of the barriers when approaching symmetric mass division. This conclusion is inferred by computing the half-lives of cluster emission and spontaneous cold fission for U-234. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Romania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000223143300025 L2 - cluster radioactivity;spontaneous fission;spectroscopic factor;algebraic models of clusterization;COLD-FISSION; VIBRON MODEL; RADIOACTIVITY; CF-252; NUCLEI; DEFORMATIONS; FRAGMENTS; STATES; LIGHT SO - Physics Letters B 2004 ;595():187-192 11135 UI - 6454 AU - Heymsfield AJ AU - Schmitt CG AU - Bansemer A AU - Baumgardner D AU - Weinstock EM AU - Smith JT AU - Sayres D AD - Natl Ctr Atmospher Res, Boulder, CO 80301, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoHarvard Univ, Cambridge, MA 02138, USAHeymsfield, AJ, Natl Ctr Atmospher Res, Boulder, CO 80301, USA TI - Effective ice particle densities for cold anvil cirrus AB - [1] This study derives effective ice particle densities (rho(e)) from data collected by the NASA WB-57F aircraft near the tops of Florida anvils during the Cirrus Regional Study of Tropical Anvils and Cirrus Layers ( CRYSTAL) Florida Area Cirrus Experiment (FACE). The rho(e)-ice particle mass divided by the volume of an equivalent diameter liquid sphere-, is obtained for particle populations ((ρ(e)) over bar) and single sizes from a few to 200 - 300 mum in maximum dimension using measurements of condensed water content and particle size distributions. Density values are needed for numerical modeling of ice cloud microphysical properties and remote sensing retrievals, and have not up to now been characterized for cold ice clouds containing mixed particle habits. The (ρ(e)) over bar decrease with increasing slopes of gamma size distributions fitted to the size distributions, ranging from 0.15 - 0.91 g cm(-3). For single sizes, rho(e) obeys a power-law with an exponent of about - 0.4 MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000188306600001 L2 - CLOUDS SO - Geophysical Research Letters 2004 ;31(2): 11136 UI - 4266 AU - Hidalgo-Gonzalez RM AU - varez-Borrego S AD - CICESE, Div Oceanol, Ensenada, Baja California, MexicoAlvarez-Borrego, S, CICESE, POB 434844, San Diego, CA 92143, USA TI - Total and new production in the Gulf of California estimated from ocean color data from the satellite sensor SeaWIFS AB - Integrated total (P-(Tint)) and new production (P-newint) (g C m(-2) d(-1)) were calculated for the Gulf of California with semi-analytical models from the literature, using chlorophyll a concentrations (Chl(sat)) and the vertical attenuation coefficients of light (K-490) from monthly composites of the satellite sensor SeaWIFS (1997-2002). The phytoplankton biomass vertical distribution associated with Chl(sat), and the vertical distribution of the f-ratio (f((z)) = P-new(z)/P-T(z)), were deduced from historic oceanographic data. The year was divided into two seasons: cool and warm. Values for P-Tint had a large seasonal variation (e.g., 1.16-1.91 for the cool season, and 0.39-0.49 for the warm season). Values for Pnewint for the cool season increased from the entrance region to the big islands region and then it remained the same from there to the northern Gulf, with values up to twice as large in the two latter regions (up to 1.33 g C m(-2) d-1) with respect to those of the entrance (up to 0.48). Values of P-newint for the warm season were less than half those of the cool season (0.25-0.31). In spite of the limited data, a clear interannual P-Tint variability is evident for the entrance region, with lowest values for the 1997-1999 ENSO, event. This kind of variation was also present for the central Gulf, but the effect was much weaker due to its strong dynamics. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700017 L2 - PHOTOSYNTHETIC PARAMETERS; PARTICLE FLUXES; NORTH-ATLANTIC; PHYTOPLANKTON; VARIABILITY; TEMPERATURE; WATERS; BASIN; ZONE; SEA SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):739-752 11137 UI - 4897 AU - Hidalgo JG AU - Serna R AU - Haro-Poniatowski E AU - Afonso CN AD - CSIC, Inst Opt, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, CBI, Mexico City 09340, DF, MexicoHidalgo, JG, CSIC, Inst Opt, Serrano 121, E-28006 Madrid, Spain TI - Evidence for self-sputtering during pulsed laser deposition of Zn AB - Thin films of Zn have been prepared by pulsed laser deposition with a KrF excimer laser (248 nm). The laser energy density (E.D.) on the target has been varied in the 1 to 5 J/cm(2) range. The results show that as the E.D. increases the material distribution changes. For low E.D.(less than or equal to 1.6 J/cm(2)) the maximum of the distribution is at the substrate center, for intermediate E.D. it is displaced to the side, and a clear minimum appears at the center of the substrate for the higher E.D. (greater than or equal to4.5 J/cm(2)). The growth velocity at the center of the substrate reaches a maximum value for E.D. of 2.8 J/cm(2), and decreases for higher E.D. as a result of the competition between deposition and self-sputtering. Virtually a zero growth velocity is obtained for E.D. above 4.5 J/cm(2). The self-sputtering process is most likely responsible for the increase of the film surface roughness as a function of the laser E.D. The low cohesive energy for metal Zn, compared to other metals (Fe, Ag, Cu) is correlated with the high efficiency of the self-sputtering for this material MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000222766100048 L2 - FILMS; ABLATION; VACUUM; GAS SO - Applied Physics A-Materials Science & Processing 2004 ;79(4-6):915-918 11138 UI - 3991 AU - Higo H AU - Miura S AU - Horio M AU - Mimori T AU - Hamano S AU - Agatsuma T AU - Yanagi T AU - Cruz-Reyes A AU - Uyema N AU - de Arias AR AU - Matta V AU - Akahane H AU - Hirayama K AU - Takeuchi T AU - Tada I AU - Himeno K AD - Kyushu Univ, Grad Sch Med Sci, Dept Parasitol, Fukuoka 8128585, JapanKeio Univ, Sch Med, Dept Trop Med & Parasitol, Keio, JapanUniv Occupat & Environm Hlth, Sch Med, Dept Parasitol & Trop Publ Hlth, Kitakyushu, Fukuoka, JapanKumamoto Univ, Sch Med, Dept Tumor Genet Biol, Kumamoto 860, JapanKochi Med Sch, Dept Environm Hlth Sci, Kochi, JapanNagasaki Univ, Inst Trop Med, Dept Protozool, Nagasaki 852, JapanUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoInst Invest Ciencias Salud, Dept Trop Med, Asuncion, ParaguayUniv Nacl San Carlos, Fac Ciencias Quim & Farm, San Carlos, GuatemalaFukuoka Univ, Sch Med, Dept Parasitol, Fukuoka 81401, JapanNagasaki Univ, Inst Trop Med, Dept Mol Immunogenet, Nagasaki 852, JapanHigo, H, Kyushu Univ, Grad Sch Med Sci, Dept Parasitol, Maidashi 3-1-1, Fukuoka 8128585, Japan TI - Genotypic variation among lineages of Trypanosoma cruzi and its geographic aspects AB - Isozyme analysis with 18 enzyme loci was conducted on 146 isolates of Trypanosoma cruzi from Mexico, Guatemala, Colombia, Ecuador, Peru, Brazil, Bolivia, Paraguay and Chile. Forty-four different MLGs (groups of isolates with identical multilocus genotypes) were identified and a phylogeny was constructed. The phylogenetic tree consisted of two main groups (T cruzi I, T cruzi II), and the latter was further divided into two subgroups (T cruzi IIa, T cruzi IIb-e). Evidence of hybridization between different MLGs of T cruzi II was found, which means that genetic exchanges seem to have occurred in South American T cruzi. On the other hand, the persistence of characteristic T cruzi I and T cruzi II isozyme patterns in single small villages in Bolivia and Guatemala suggested that genetic exchange is very rare between major lineages. A significant difference in genetic diversity was shown between T cruzi I and T cruzi II from several indices of population genetics. Two possibilities could explain this genetic variation in the population: differences in evolutionary history and/or different tendencies to exchange genetic material. Broad-scale geographic distributions of T cruzi I and T cruzi IIb-e were different; T cruzi I occurred in Central America and south to Bolivia and Brazil, while T cruzi IIb-e occurred in the central and southern areas of South America, overlapping with T cruzi I in Brazil and Bolivia. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Guatemala MH - Japan MH - Mexico|Distrito Federal MH - Paraguay PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 9 U4 - Parasitology U5 - J;Article AV - English IS - 1383-5769 UR - ISI:000224711600008 L2 - Trypanosoma cruzi;Chagas' disease;isozyme;phylogeny;genetic exchange;genetic variation;pathogenicity;CHAGAS-DISEASE; GENETIC EXCHANGE; RIBOSOMAL-RNA; NATURAL-POPULATIONS; CENTRAL-AMERICA; VARIABILITY; SUPPORTS; AGENT; DNA; ELECTROPHORESIS SO - Parasitology International 2004 ;53(4):337-344 11139 UI - 3569 AU - Hilerio I AU - Mathia T AU - Alepee C AD - Ecole Cent Lyon, Lab Tribol & Dynam Syst, F-69131 Ecully, FranceUniv Autonoma Metropolitana, Unidad Azcapotzalco, Dept Mat, Mexico City, DF, MexicoFinortho & SGM, St Etienne, FranceMathia, T, Ecole Cent Lyon, Lab Tribol & Dynam Syst, F-69131 Ecully, France TI - 3D measurements of the knee prosthesis surfaces applied in optimizing of manufacturing process AB - The goal of this work is limited in the evolution of the superficial state in knee prosthesis. It is presented a 3D analysis in their topography, in order to optimize a manufacturing process. The material employed is alloy base cobalt. Its percentage minimum in weight is: 26.5% Cr, 4.5% Mo and the balance is cobalt. In attention to the complex form of the prosthesis, until now has been utilised a finishing technique manually. This system is very heavy, and besides it is not practice. Afterwards there is an additional problem in relation to the sickness that generates by the powder produced in the polishing action. For that, it has been thought in do this work with the mechano-chemical method to obtain a superficial finishing, as less similar so that it has been found until now. Since the medical point of view it is important than the surface roughness be small in attention to the contact of the prosthesis with the bone and with the polymer that it is founded in the back of the implant. The mechano-chemical method selected to make this work consists in a soft wear process in presence of an additive that helps to obtain the surface state wished. The pieces were obtained by the lost wax technique. We emphasize that the work consists in evaluate the roughness evolution in function of the mechanism proposed. We present different stages of this work until to obtain a surface state specular. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0043-1648 UR - ISI:000225750700006 L2 - knee prosthesis;analysis 3D;mechano-chemical finishing;roughness surface;wear SO - Wear 2004 ;257(12):1230-1234 11140 UI - 5016 AU - Hill MR AU - Briggs L AU - Montano MM AU - Estrada A AU - Laurent GJ AU - Selman M AU - Pardo A AD - Rayne Inst, Royal Free & Univ Coll Med Sch, Dept Med, Ctr Resp Res, London WC1E 6JJ, EnglandInst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUNAM, Fac Ciencias, Mexico City 04000, DF, MexicoHill, MR, Rayne Inst, Royal Free & Univ Coll Med Sch, Dept Med, Ctr Resp Res, 5 Univ St, London WC1E 6JJ, England TI - Promoter variants in tissue inhibitor of metalloproteinase-3 (TIMP-3) protect against susceptibility in pigeon breeders' disease AB - Background: Tissue inhibitors of metalloproteinases (TIMPs) play a major role in extracellular matrix turnover in the lung. However, in chronic lung disorders such as idiopathic pulmonary fibrosis (IPF) and pigeon breeders' disease (PBD), TIMPs may promote an adverse non-degradative environment. We hypothesised that polymorphisms in TIMP-3 could affect susceptibility to IPF and PBD. Methods: Two promoter variants, -915A>G and -1296T>C, were genotyped in 323 healthy subjects, 94 subjects with IPF, 115 with PBD, and 90 exposed to avian antigen but without PBD. The severity of fibrosis in lung tissue and the clinical outcome after 1 year was determined in the PBD group. Results: The variants did not influence susceptibility to IPF, but the rare alleles of both variants appeared to be protective against susceptibility to PBD ( odds ratio ( OR) for carriage of at least one rare allele from either variant 0.48, 95% CI 0.30 to 0.76, p = 0.002). Haplotype analysis of positions -915 and -1296 estimated four haplotypes: *A*T, *G*T, *A*C and *G*C, respectively. Their frequencies differed overall between subjects with PBD and healthy subjects (p = 0.0049) and this was attributable primarily to the *G*C haplotype (OR 0.53, 95% CI 0.36 to 0.77, p = 0.001). The severity of fibrosis correlated with poorer outcome in the PBD group (r = 0.73, p<0.01) but no relationship was seen between the *G*C haplotype and outcome or fibrosis. However, PBD subjects with the *G*C haplotype did have proportionally fewer lymphocytes in their bronchoalveolar fluid than those with the common *A*T haplotype (p = 0.029). Conclusions: TIMP-3 variants appear to contribute to susceptibility to PBD. This may be through the inflammatory reaction rather than the fibrotic reaction MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 6 U4 - Respiratory System U5 - J;Article AV - English IS - 0040-6376 UR - ISI:000222329600010 L2 - IDIOPATHIC PULMONARY-FIBROSIS; HYPERSENSITIVITY PNEUMONITIS; MATRIX METALLOPROTEINASES; GENE-EXPRESSION; POLYMORPHISMS; POPULATION; MICE SO - Thorax 2004 ;59(7):586-590 11141 UI - 6311 AU - Hinds DA AU - Stokowski RP AU - Patil N AU - Konvicka K AU - Kershenobich D AU - Cox DR AU - Ballinger DG AD - Perlegen Sci, Mountain View, CA 94043, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City, DF, MexicoHinds, DA, Perlegen Sci, 2021 Stierlin Court, Mountain View, CA 94043 USA TI - Matching strategies for genetic association studies in structured populations AB - Association studies in populations that are genetically heterogeneous can yield large numbers of spurious associations if population subgroups are unequally represented among cases and controls. This problem is particularly acute for studies involving pooled genotyping of very large numbers of single-nucleotide-polymorphism (SNP) markers, because most methods for analysis of association in structured populations require individual genotyping data. In this study, we present several strategies for matching case and control pools to have similar genetic compositions, based on ancestry information inferred from genotype data for similar to300 SNPs tiled on an oligonucleotide-based genotyping array. We also discuss methods for measuring the impact of population stratification on an association study. Results for an admixed population and a phenotype strongly confounded with ancestry show that these simple matching strategies can effectively mitigate the impact of population stratification MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 44 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000188860000012 L2 - ADMIXED POPULATIONS; ADMIXTURE; LINKAGE; TOOL; STRATIFICATION SO - American Journal of Human Genetics 2004 ;74(2):317-325 11142 UI - 4757 AU - Hinojosa-Arango G AU - Riosmena-Rodriguez R AD - UABCS, Dept Marine Biol, Programa Invest Bot Marina, La Paz 23080, Baja California, MexicoHinojosa-Arango, G, Queens Univ Belfast, Sch Biol & Biochem, Ctr Med Biol, Belfast BT9 7BL, Antrim, North Ireland TI - Influence of rhodolith-forming species and growth-form on associated fauna of rhodolith beds in the central-west Gulf of California, Mexico AB - Rhodoliths provide a stable and three-dimensional habitat to which other seaweeds and invertebrates can attach. Although ecological factors affecting rhodolith beds have been studied, little is known about the effect of rhodolith species and growth-form on associated fauna. Experiments were conducted at three rhodolith beds in the central-west Gulf of California. Faunal abundance differed significantly in relation to rhodolith-forming species, but no significant differences were observed between different growth-forms. Rhodolith structure differs between the species Lithophyllum margaritae and Neogoniolithon trichotomum, and the combination of structure differences and rhodolith abundances may be responsible of the significant differences in faunal abundance and richness. Crustaceans, polychaetes and molluscs were the most important taxa in all three rhodolith beds. The amphipod species Pontogeneia nasa and the cnidarian Aiptasia sp. were dominant in both rhodolith beds, El Requeson and Isla Coyote, in Bahia Concepcion. The Isla Coronados rhodolith bed was dominated by an unidentified harpacticoid copepod (Copepoda sp. 1). Rhodolith species is more important than growth-form in determining abundance and richness of the associated fauna. Nevertheless, factors such as wave motion, depth, bioturbation and others should be considered when studying organisms associated with rhodolith beds MH - Mexico|Baja California MH - United Kingdom PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0173-9565 UR - ISI:000223127500002 L2 - associated fauna;rhodolith beds;assemblages;growth-form;Gulf of California;Mexico;GREAT-BARRIER-REEF; MACROCYSTIS-PYRIFERA; SEA-URCHIN; ECOLOGY; MAERL; COMMUNITY; ALGAE; BAY; COLONIZATION; MACROFAUNA SO - Marine Ecology-Pubblicazioni Della Stazione Zoologica di Napoli I 2004 ;25(2):109-127 11143 UI - 5784 AU - Hinojosa-Garro D AU - Zambrano L AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoHinojosa-Garro, D, Univ Essex, Dept Biol Sci, John Tabor Labs, Colchester CO4 3SQ, Essex, England TI - Interactions of common carp (Cyprinus carpio) with henthic crayfish decapods in shallow ponds AB - Introduction of common carp (Cyprinus carpio) for aquaculture increased in recent decades. This fish is now established in many new water systems creating interactions with native species. Some of these interactions have been partly understood, but most of them remain unknown. For instance, in shallow ponds of central Mexico, populations of crayfish (Cambarellus montezumae) are reduced with high carp densities, but little is known about the mechanisms that lead to this depletion. Gut analysis showed that carp ate mostly detritus, small invertebrates, plant tissues and seeds, reducing the possibility of predation as a main cause of crayfish population reduction. Field and experimental data suggest that the effect of carp on crayfish is associated with habitat depletion. Submerged macrophyte Potamogeton pectinatus and the algae Cladophora glomerata are important components in crayfish habitat, and their coverage in the water system is affected by carp presence. A second effect of carp on crayfish populations is associated with the alteration of crayfish behaviour. Crayfish displacement speed increased significantly in the presence of carp MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000220784500011 L2 - freshwater decapods;macrophytes;exotic fish introduction;habitat modifications;Cambarellus montezumae;FRESH-WATER MACROPHYTES; FISH; IMPACTS; LAKE; HERBIVORY; TURBIDITY; BIOMASS; LARVAE SO - Hydrobiologia 2004 ;515(1-3):115-122 11144 UI - 6532 AU - Ho JS AU - Gomez S AU - Ogawa K AU - Aritaki M AD - Calif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840, USAInst Ciencias Mar & Limnol, Unidad Acad Mazatlan, Mazatlan, Sinaloa, MexicoUniv Tokyo, Grad Sch Agr & Life Sci, Dept Aquat Biosci, Bunkyo Ku, Tokyo 1138657, JapanJapan Sea Farming Assoc, Miyako Stn, Miyako, Iwate 0270097, JapanHo, JS, Calif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840 USA TI - Two species of parasitic copepods (Caligidae) new to Japan AB - Two species of parasitic copepods (Siphonostomatoida: Caligidae), Caligus sclerotinosus Roubal, Armitage & Rohde, 1983, parasitic on red seabream Pagrus major (Temminck & Schlegel), and Lepeophtheirus longiventralis Yu & Wu, 1932, parasitic on spotted halibut Verasper variegatus (Temminck & Schlegel), are redescribed based on material found on their respective hosts cultured in Japan. Both species are new to Japan. Preliminary observation on the occurrence of L. longiventralis indicates that the larval development takes place on the body surface of the host and only the post-mated female migrates into the host's gill-cavities. Whilst the occurrence of L. longiventralis in Japan can be considered as due to natural causes, the occurrence of C. sclerotinosus is likely due to anthropogenic activities MH - USA MH - Japan MH - Mexico|Sinaloa PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Parasitology U5 - J;Article AV - English IS - 0165-5752 UR - ISI:000187786900003 L2 - DEVELOPMENTAL STAGES SO - Systematic Parasitology 2004 ;57(1):19-34 11145 UI - 6238 AU - Hoballah ME AU - Degen T AU - Bergvinson D AU - Savidan A AU - Tamo C AU - Turlings TCJ AD - Univ Neuchatel, Inst Zool, Lab Ecol Anim & Entomol, CH-2007 Neuchatel, SwitzerlandCIMMYT, Mexico City 06600, DF, MexicoTurlings, TCJ, Univ Neuchatel, Inst Zool, Lab Ecol Anim & Entomol, Case Postale 2, CH-2007 Neuchatel, Switzerland TI - Occurrence and direct control potential of parasitoids and predators of the fall armyworm (Lepidoptera : Noctuidae) on maize in the subtropical lowlands of Mexico AB - 1 Native natural enemies have the potential to control fall armyworm Spodoptera frugiperda (Smith) in tropical maize grown in Mexico, where this insect pest causes severe economic losses to farmers. It has been proposed that enhancing herbivore-induced volatile emissions in maize plants may help to increase the effectiveness of natural enemies, which use these volatiles to locate their prey. This will only be of immediate benefit to farmers if the activity of the natural enemies results in a direct reduction in herbivory. Here we report on field surveys for the most common natural enemies in a tropical maize-growing region in Mexico and the potential effects of these enemies on herbivory by fall armyworm. 2 Caterpillars were collected in maize fields near Poza Rica in the state of Veracruz during January and February 1999, 2000 and 2001. Plants were either naturally infested by S. frugiperda, or artificially infested with laboratory-reared larvae. Ten species of parasitoids emerged from the collected larvae and eight species of predators that are known to feed on larvae and eggs were observed on the plants. Campoletis sonorensis (Cameron) (Hymenoptera: Ichneumonidae) was the dominant parasitoid species, in 1999 and 2001. 3 Of the nine larval parasitoids collected, six (all solitary) are known to reduce herbivory, whereas one causes the host to eat more (for two species this is not known). This implies that enhancing the effectiveness of solitary endoparasitoids may benefit subsistence farmers in developing countries by immediately reducing herbivory. The overall benefit for the plant resulting from parasitoid activity also has important implications for the evolutionary role of parasitoids in contributing to selection pressures that shape indirect defences in plants MH - Mexico|Distrito Federal MH - Switzerland PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 1461-9555 UR - ISI:000189000200009 L2 - biological control;fall armyworm;maize;Mexico;pest management;Spodoptera frugiperda;parasitoids;predators;SPODOPTERA-FRUGIPERDA LEPIDOPTERA; EUPLECTRUS-PLATHYPENAE; NATURAL ENEMIES; HYMENOPTERA; PARASITIZATION; HERBIVORES; EMISSIONS; VARIETIES; IMPACT; PLANTS SO - Agricultural and Forest Entomology 2004 ;6(1):83-88 11146 UI - 4536 AU - Hoffmann T AU - Kutter C AU - Santamaria JM AD - Ctr Invest Cient Yucatan, Unidad Biotecnol, Merida 97200, Yucatan, MexicoMax Planck Inst Mol Pflanzenphysiol, D-14476 Golm, GermanyFriedrich Miescher Inst, CH-4058 Basel, SwitzerlandSantamaria, JM, Ctr Invest Cient Yucatan, Unidad Biotecnol, Merida 97200, Yucatan, Mexico TI - Capacity of Salvinia minima Baker to tolerate and accumulate As and Pb AB - The use of Salvinia minima Baker for the removal of lead (Pb) and arsenic (As) from aqueous solutions was investigated. In a first approach, the effect of different concentrations of AsO43- and Pb(II) on the growth and accumulation of these metals was studied. The plants tolerated concentrations of 20-40 muM Pb(II) and 200 muM of AsO43-. Toxic effects occurred when 20 muM of Pb(II) and 100 muM AsO43- were used. These effects included growth inhibition (decreased yield of biomass and frond area) as well as an altered frond (leaf-like structure in ferns) appearance and tissue consistence. S. minima showed a high uptake of Pb (34 mg/g dry weight) compared to As (0.5 mg/g dry weight). The uptake of As was inhibited by phosphate. Additional kinetic studies revealed a two-stage accumulation of both elements: a rapid first phase within the first 6-12 hours and a slow second phase up to the end of the 96-hour experiment MH - Germany MH - Mexico|Yucatan MH - Switzerland PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 1618-0240 UR - ISI:000223596800010 L2 - ARSENATE TOLERANCE; HOLCUS-LANATUS; LEAD; METAL; CADMIUM; PHYTOCHELATINS; SYSTEM; PB(II); PLANTS SO - Engineering in Life Sciences 2004 ;4(1):61-65 11147 UI - 3510 AU - Holmstrom T AU - Leros N AU - Burnstein RA AU - Chakravorty A AU - Chan A AU - Chen YC AU - Choong WS AU - Clark K AU - Dukes EC AU - Durandet C AU - Felix J AU - Fu Y AU - Gidal G AU - Gu P AU - Gustafson HR AU - Ho C AU - Huang M AU - James C AU - Jenkins CM AU - Jones T AU - Kaplan DM AU - Lederman LM AU - Longo MJ AU - Lopez F AU - Lu LC AU - Luebke W AU - Luk KB AU - Nelson KS AU - Park HK AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Teng PK AU - Volk J AU - White CG AU - White SL AU - Zyla P AD - Univ Virginia, Charlottesville, VA 22904, USAAcad Sinica, Inst Phys, Taipei 11529, TaiwanUniv Calif Berkeley, Berkeley, CA 94720, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Leon 37000, MexicoIIT, Chicago, IL 60616, USAUniv Lausanne, CH-1015 Lausanne, SwitzerlandLawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv S Alabama, Mobile, AL 36688, USADukes, EC, Univ Virginia, Charlottesville, VA 22904, USA TI - Search for CP violation in Charged-Xi and Lambda hyperon decays AB - We have compared the p and (p) over bar angular distributions in 117x10(6) Xi(-)-->Lambdapi(-)-->ppi(-)pi(-) and 41x10(6) (&UXi;) over bar (+)--><<(Lambda)over bar>pi(+)-->(p) over bar pi(+)pi(+) decays using a subset of the data from the HyperCP experiment (E871) at Fermilab. We find no evidence of CP violation, with the direct-CP-violating parameter A(XiLambda)equivalent to(alpha(Xi)alpha(Lambda)-(α) over bar (Xi)(α) over bar (Lambda))/(alpha(Xi)alpha(Lambda)+(α) over bar (Xi)(α) over bar (Lambda))=[0.0+/-5.1(stat)+/-4.4(syst)]x10(-4) MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000226054600014 L2 - NONLEPTONIC DECAYS; NONCONSERVATION; PHYSICS SO - Physical Review Letters 2004 ;93(26): 11148 UI - 3999 AU - Hong SB AU - Lee SH AU - Shin CH AU - Woo AJ AU - Alvarez LJ AU - Zicovich-Wilson CM AU - Camblor MA AD - Hanbat Natl Univ, Div Chem Engn, Taejon 305719, South KoreaChungbuk Natl Univ, Dept Chem Engn, Chungbuk 361763, South KoreaEwha Womans Univ, Dept Sci Educ, Seoul 120750, South KoreaUniv Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62210, Morelos, MexicoUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCSIC, Inst Ciencia Mat, E-28049 Madrid, SpainHong, SB, Hanbat Natl Univ, Div Chem Engn, Taejon 305719, South Korea TI - In situ disorder-order transformation in synthetic gallosilicate zeolites with the NAT topology AB - Here, we report that synthetic gallosilicate molecular sieves with the NAT topology and Si/Ga ratios close to but slightly higher than 1.50 undergo an in situ transformation under their crystallization conditions. The materials have been studied ex situ by using powder X-ray diffraction, elemental and thermal analyses, and multinuclear MAS NMR. The transformation is characterized by a change in the distribution of Si and Ga of the NAT framework, from a quite (but not completely) disordered phase to a very highly (but not completely) ordered one, accompanied by a change from tetragonal to orthorhombic symmetry. During most of the solution-mediated transformation, no noticeable signs of fresh precipitation, phase segregation, or changes in the chemical composition are detected. Intermediate materials show variations in the degree of Si-Ga ordering and orthorhombic distortion and are not physical mixtures of the disordered and ordered phases. Ab initio calculations strongly suggest a preferential siting of Si in the tetrahedral sites involved in a smaller number of 4-rings in the NAT topology (i.e., the low multiplicity site). The cost of violations of Loewenstein's rule has also been calculated. For this topology and chemical composition the preferential siting and Loewenstein's rule drive together the system to the ordered configuration. A Monte Carlo sampling procedure affords a reasonable model for the initial, mainly disordered state, which fits well within the experimental disorder-order series MH - Mexico|Morelos MH - South Korea MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000224685200052 L2 - MQ MAS NMR; AL-27 MAS; CRYSTAL-STRUCTURE; PERIODIC-SYSTEMS; CHEMICAL-SHIFTS; NATROLITE; SI-29; AL; DENSITY; ANGLES SO - Journal of the American Chemical Society 2004 ;126(42):13742-13751 11149 UI - 3614 AU - Honma K AU - Abraham JL AU - Chiyotani K AU - De Vuyst P AU - Dumortier P AU - Gibbs AR AU - Green FHY AU - Hosoda Y AU - Iwai K AU - Williams WJ AU - Kohyama N AU - Ostiguy G AU - Roggli VL AU - Shida H AU - Taguchi O AU - Vallyathan V AD - Dokkyo Univ, Sch Med, Dept Pathol, Mibu, Tochigi 3210293, JapanSUNY Syracuse, Hlth Sci Ctr, Dept Pathol, Syracuse, NY 13210, USAFree Univ Brussels, Hop Erasme, Dept Chest Med, B-1070 Brussels, BelgiumLlandough Hosp, Dept Histopathol, Penarth, S Glam, WalesRadiat Effects Assoc, Tokyo, JapanUniv Calgary, Dept Pathol & Lab Med, Calgary, AB, CanadaRes Inst TB, Tokyo, JapanUniv Wales Coll Cardiff, Dept Pathol, Cardiff CF1 3NS, S Glam, WalesNatl Inst Ind Hlth, Minist Labor, Tokyo, JapanUniv Montreal, Hop Maison Neuve Rosemont, Dept Med Chem, Montreal, PQ, CanadaDuke Univ, Med Ctr, Dept Pathol, Durham, NC 27710, USANIOSH, Pathol & Physiol Branch, Morgantown, WV, USANatl Inst Occupat Hlth, Budapest, HungaryFUNDACENTRO, Minist Labor, Sao Paulo, BrazilInt Soc Radiol, Bethesda, MD, USAInst Nacl Cancerol, Mexico City, DF, MexicoHonma, K, Dokkyo Univ, Sch Med, Dept Pathol, Mibu, Tochigi 3210293, Japan TI - Proposed criteria for mixed-dust pneumoconiosis: Definition, descriptions, and guidelines for pathologic diagnosis and clinical correlation AB - We defined mixed-dust pneumoconiosis (MDP) pathologically as a pneumoconiosis showing dust macules or mixed-dust fibrotic nodules (MDF), with or without silicotic nodules (SN), in an individual with a history of exposure to mixed dust. We defined the latter arbitrarily as a mixture of crystalline silica and nonfibrous silicates. According to our definition of MDP, therefore, MDF should outnumber SN in the lung to make a pathologic diagnosis of MDP. In the absence of confirmation of exposure, mineralogic analyses can be used to support the pathologic diagnosis. The clinical diagnosis of MDP requires the exclusion of other well-defined pneumoconioses, including asbestosis, coal workers' pneumoconiosis, silicosis, hematite miners' pneumoconiosis, welders' pneumoconiosis, berylliosis, hard metal disease, silicate pneumoconiosis, diatomaceous earth pneumoconiosis, carborundum pneumoconiosis, and corundum pneumoconiosis. Typical occupations associated with the diagnosis of MDP include metal miners, quarry workers, foundry workers, pottery and ceramics workers, and stonemasons. Irregular opacities are the major radiographic findings in MDP (ILO 1980), in contrast to silicosis, in which small rounded opacities predominate. Clinical symptoms of MDP are nonspecific. MDP must be distinguished from a variety of nonoccupational interstitial pulmonary disorders. (C) 2004 Elsevier Inc. All rights reserved MH - Belgium MH - Brazil MH - Canada MH - Hungary MH - Japan MH - Mexico|Distrito Federal MH - USA MH - United Kingdom PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 6 U4 - Pathology U5 - J;Article AV - English IS - 0046-8177 UR - ISI:000225940900012 L2 - dust;pneumoconiosis;silica;silicates;silicosis;INTERSTITIAL LUNG-DISEASE; BRONCHOALVEOLAR LAVAGE FLUIDS; OF-AMERICAN-PATHOLOGISTS; HARD METAL DISEASE; SAFETY-AND-HEALTH; PULMONARY-FIBROSIS; RESPIRATORY BRONCHIOLITIS; WELDERS PNEUMOCONIOSIS; TALC PNEUMOCONIOSIS; ELECTRON-MICROSCOPY SO - Human Pathology 2004 ;35(12):1515-1523 11150 UI - 3580 AU - Hossain MS AU - Hossain MA AU - Rahman MM AU - Mondol MAM AU - Bhuiyan MSA AU - Gray AI AU - Flores ME AU - Rashid MA AD - Univ Dhaka, Fac Pharm, Dept Pharmaceut Chem, Dhaka 1000, BangladeshRajshahi Univ, Dept Pharm, Rajshahi 6205, BangladeshUniv Strathclyde, Dept Pharmaceut Sci, Phytochem Res Lab, Glasgow G4 0NR, Lanark, ScotlandNatl Autonomous Univ Mexico, Biomed Res Inst, Dept Mol Biol & Biotechnol, Mexico City, DF, MexicoRashid, MA, Univ Dhaka, Fac Pharm, Dept Pharmaceut Chem, Dhaka 1000, Bangladesh TI - Amides from the fungus Streptomyces hygroscopicus and their antimicrobial activity (vol 65, pg 2147, 2004) MH - Bangladesh MH - Mexico|Distrito Federal MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Correction AV - English IS - 0031-9422 UR - ISI:000225908200013 SO - Phytochemistry 2004 ;65(24):3289-3289 11151 UI - 4572 AU - Hossain MS AU - Hossain MA AU - Rahman MM AU - Mondol MAM AU - Bhuiyan MSA AU - Gray AI AU - Flores ME AU - Rashid MA AD - Univ Dhaka, Fac Pharm, Dept Pharmaceut Chem, Dhaka 1000, BangladeshRajshahi Univ, Dept Pharm, Rajshahi 6205, BangladeshUniv Strathclyde, Dept Pharmaceut Sci, Phytochem Res Lab, Glasgow G4 0NR, Lanark, ScotlandUniv Nacl Autonoma Mexico, Inst Biomed Res, Dept Mol Biol & Biotechnol, Mexico City 04510, DF, MexicoRashid, MA, Univ Dhaka, Fac Pharm, Dept Pharmaceut Chem, Dhaka 1000, Bangladesh TI - Amides from the fungus Streptomyces hygroscopicus and their antimicrobial activity AB - Three amides, N-salicyloyl-2-aminopropan-1,3-diol (1) and 1-acetyl-N-salicyloyl-2-aminopropan-3-ol (2) including a natural product, N-salicyloyl-2-aminopropan-1-ol (3) were isolated from an ethyl acetate extract of the culture filtrate of a fungus, Streptomyces hygroscopicus. The structures of these compounds were unambiguously established by interpretation of their spectral data including, a series of 1D and 2D-NMR and MS analyses. Compounds 1-3 showed significant antibacterial activity against a wide range of Gram positive and Gram negative bacteria. (C) 2004 Elsevier Ltd. All rights reserved MH - Bangladesh MH - Mexico|Distrito Federal MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000223527500021 L2 - Streptomyces hygroscopicus;amides;N-salicyloyl-2-aminopropan-1,3-diol;1-acetyl-N-salicyloyl-2-aminopropan-3-ol;N-salicyloyl-2-aminopropan-1-ol;antimicrobial;METABOLITE SO - Phytochemistry 2004 ;65(14):2147-2151 11152 UI - 5064 AU - Hotz C AU - DeHaene J AU - Villalpando S AU - Rivera J AU - Woodhouse L AU - King JC AD - Ctr Invest Nutr & Salud, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoUSDA, Western Human Nutr Res Ctr, Davis, CA, USA TI - Comparison of fractional zinc absorption (FAZ) from ZnO, ZnO+Na2EDTA, Na2ZnEDTA, and ZnSO4, when added as fortificants to a maize tortilla-based meal MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470600729 SO - Faseb Journal 2004 ;18(4):A151-A151 11153 UI - 6183 AU - Hu C AU - cuna-Askar K AU - Englande AJ AD - Tulane Univ, Sch Publ Hlth & Trop Med, Environm Hlth Sci Dept, New Orleans, LA 70112, USAUniv Autonoma Nuevo Leon, Fac Med, Lab Biorremediac Ambiental, Monterrey 64460, NL, MexicoHu, C, Tulane Univ, Sch Publ Hlth & Trop Med, Environm Hlth Sci Dept, 1440 Canal St, New Orleans, LA 70112 USA TI - Bioremediation of methyl tertiary-butyl ether (MTBE) by an innovative biofilter AB - Methyl tertiary-butyl ether (MTBE) is a synthetic chemical used in unleaded gasoline as an additive to reduce levels of ozone and carbon monoxide from auto exhaust. Due to its chemical and recalcitrant properties, MTBE has caused groundwater contamination worldwide. A laboratory-scale biofilter made of a natural fiber (kenaf) mat and inoculated with MTBE-degrading microorganisms, was evaluated for MTBE removal efficiency. Operational parameters of oxygen flow rate, hydraulic retention time (HRT), yeast extract and initial MTBE concentration were varied and MTBE removal efficiencies determined. Four kinetic models were evaluated to describe the MTBE removal in the reactor. Formaldehyde and tertiary butyl alcohol (the most two reported MTBE biodegradation byproducts) were not found in the effluent; instead, carbon dioxide was monitored as the end product based on the results of a metabolic mass balance evaluation. Toxicity of treated effluent was evaluated by employing the Microtox acute toxicity test and comparing that to the influent MH - USA MH - Mexico|Nuevo Leon PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000189084600013 L2 - biodegradation;biofilm;biofilter;bioremediation;MTBE;toxicity;BIODEGRADATION SO - Water Science and Technology 2004 ;49(1):87-94 11154 UI - 5028 AU - Huang M AU - Burnstein RA AU - Chakravorty A AU - Chen YC AU - Choong WS AU - Clark K AU - Dukes EC AU - Durandet C AU - Felix J AU - Gidal G AU - Gustafson HR AU - Holmstrom T AU - James C AU - Jenkins CM AU - Jones T AU - Kaplan DM AU - Lederman LM AU - Leros N AU - Longo MJ AU - Lopez F AU - Lu L AU - Luebke W AU - Luk KB AU - Nelson KS AU - Park HK AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Volk J AU - White C AU - White S AU - Zyla P AD - Univ Virginia, Charlottesville, VA 22904, USAAcad Sinica, Inst Phys, Taipei 11529, TaiwanUniv Calif Berkeley, Berkeley, CA 94720, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Leon 37000, MexicoIIT, Chicago, IL 60616, USAUniv Lausanne, CH-1015 Lausanne, SwitzerlandUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv S Alabama, Mobile, AL 36688, USAHuang, M, Univ Virginia, Charlottesville, VA 22904, USA TI - New measurement of Xi(-)->Lambda pi(-) decay parameters AB - Based on a sample of 144x10(6) polarized Xi(-)-->Lambdapi(-),Lambda-->ppi(-) decays collected by the HyperCP experiment (E871) at Fermilab, we report a new measurement of the Xi(-) decay-parameter angle phi(Xi)=(-2.39+/-0.64+/-0.64)degrees from which we deduce the decay parameters beta(Xi)=-0.037+/-0.011+/-0.010 and gamma(Xi)=0.888+/-0.0004+/-0.006. Assuming that the CP-violating phase difference between s and p waves is negligible, the strong phase-shift difference, delta(p)-delta(s), for Lambdapi scattering is determined to be (4.6+/-1.4+/-1.2)degrees MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000222390900009 L2 - CP INVARIANCE; XI-HYPERONS; PHASE-SHIFT; NONCONSERVATION; ASYMMETRY; VIOLATION SO - Physical Review Letters 2004 ;93(1): 11155 UI - 4093 AU - Huang QY AU - Fukami N AU - Kashida H AU - Takeuchi T AU - Kogure E AU - Kurahashi T AU - Stahl E AU - Kudo Y AU - Kimata H AU - Kudo S AD - N Shore Univ Hosp, Tsuzuki Ku, Yokohama, Kanagawa 2240032, JapanGen Hosp, PLA, Beijing, Peoples R ChinaNatl Med Ctr, Mexico City, DF, MexicoHamamatsu Univ, Sch Med, Hamamatsu, Shizuoka 43131, JapanFukami, N, N Shore Univ Hosp, Tsuzuki Ku, 35-1 Chigasaki Cho, Yokohama, Kanagawa 2240032, Japan TI - Interobserver and intra-observer consistency in the endoscopic assessment of colonic pit patterns AB - Background: The colonic pit pattern is recognized as an aid to the differential diagnosis between hyperplastic lesions, adenoma, and carcinoma, and is a focus for observation by magnification chromoendoscopy, especially in Japan. This study evaluated intra- and interobserver agreement of experienced endoscopists in the assessment of colonic pit patterns when using the Kudo classification. Methods: A total of 220 magnification chromoendoscopic pictures of colonic lesions were selected, of which 215 were collected from a consecutive series of patients. The pictures were randomly displayed twice to 6 experienced endoscopists at an interval of 1 week. Each picture was assessed for predominant pit pattern by using the classification of Kudo. Histopathologic diagnosis also was predicted based on the pit pattern diagnosis. Kappa statistics were used to estimate intra- and interobserver variation. Results: The mean (standard deviation) inter- and intra-observer kappa values for experienced endoscopists were 0.716 (0.031) and 0.810 (0.084), respectively. For prediction of histopathology according to the pit pattern diagnosis, the mean (standard deviation) inter- and intra-observer kappa values were 0.776 (0.032) (p = 0.001) and 0.862 (0.069) (p = 0.028), respectively. Conclusions: For experienced endoscopists, the inter- and intra-observer reproducibility of the classification of colonic pit pattern is good MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 17 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0016-5107 UR - ISI:000224635200004 L2 - STEREOMICROSCOPIC EXAMINATION; MAGNIFYING COLONOSCOPY; COLORECTAL-CARCINOMA; LESIONS; DIAGNOSIS; AGREEMENT; TUMORS SO - Gastrointestinal Endoscopy 2004 ;60(4):520-526 11156 UI - 3881 AU - Huanosta A AU - Alvarez E AU - Villafuerte-Castrejon ME AU - West AR AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Sonora, Dept Fis, Hermosillo, Sonora, MexicoUniv Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandHuanosta, A, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Electrical properties of Mg-doped LiTaO3 ceramics AB - The ac impedance of ceramic samples of Mg-doped LiTaO3 has been measured over the temperature range 600800 degreesC. It can be modelled by an equivalent circuit composed of a "dielectric element" R1C1C2 in parallel with a "leakage resistance" R-2. The series component R1C1, represents the polarisation associated with domain reorientation: C-1 passes through a maximum at T-c at the same time as R-2 passes through an approximate minimum. C-2 represents the bulk polarisation, R-2 shows linear Arrhenius behaviour. The solid solution were characterised by XRD and the formation mechanism was proposed. The variation of electrical properties with composition is discussed. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0025-5408 UR - ISI:000225056500010 L2 - ceramics;oxides;chemical synthesis;X-ray diffraction;crystal structure;dielectric properties;SOLID-SOLUTIONS; OPTICAL-PROPERTIES; CURIE-TEMPERATURE; NONSTOICHIOMETRY; CRYSTAL SO - Materials Research Bulletin 2004 ;39(14-15):2229-2240 11157 UI - 6520 AU - Hubacher D AU - Grimes D AU - Lara-Ricalde R AU - de la Jara J AU - Garcia-Luna A AD - Family Hlth Int, Res Triangle Pk, NC 27709, USAInst Nacl Perinatol, Mexico City, DF, MexicoInst Mexicano Seguro Social, Gineco Obstetrecia Hosp 4, Mexico City, DF, MexicoHosp Mujer, Mexico City, DF, MexicoHubacher, D, Family Hlth Int, POB 13950, Res Triangle Pk, NC 27709, USA TI - The limited clinical usefulness of taking a history in the evaluation of women with tubal factor infertility AB - Objective: To evaluate whether patient histories of gynecological infections predict tubal pathology seen at laparoscopic exam in infertile women. Design: Cross-sectional analysis from a subset of case-control subjects. Setting: Tertiary-level public hospitals with infertility clinics, Mexico City. Patient(s): Three hundred twenty-one nulligravid infertile women seeking diagnostic workup. Intervention(s): Interviews conducted before evaluation by laparoscopy. Main Outcome Measure(s): Sensitivity, specificity, and predictive values for correlating previous pelvic inflammatory disease symptoms, vaginal discharge, genital tract infections, and antibodies to Chlamydia trachomatis to confirmed diagnoses of tubal pathology and to severe tubal pathology. Result(s): Tubal pathology was found in 58% of participants (n = 185), and severe pathology was found in 29% (n = 92). None of the historical infection-related factors alone was a good overall predictor of tubal pathology; high sensitivity values (up to 73%) were offset by low specificity (down to 30%) and vice versa, for each factor. When considered simultaneously, the factors improved the overall predictive ability just slightly (84% sensitivity and 29% specificity) over the individual factors. The validity measures did not improve when examining severe tubal pathology alone. Conclusion(s): History taking related to past genital tract infections appears to be of little use in the evaluation of infertile women MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 11 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 0015-0282 UR - ISI:000187969500002 L2 - tubal infertility;previous histories or symptoms of infection;sensitivity;specificity;validity;usefulness;PELVIC-INFLAMMATORY-DISEASE; SALPINGITIS SO - Fertility and Sterility 2004 ;81(1):6-10 11158 UI - 6521 AU - Hubacher D AU - Grimes D AU - Lara-Ricalde R AU - de la Jara J AD - Family Hlth Int, Res Triangle Pk, NC 27709, USAInst Nacl Perinatol, Mexico City, DF, MexicoHubacher, D, Family Hlth Int, POB 13950, Res Triangle Pk, NC 27709, USA TI - Taking a history in the evaluation of women with tubal factor infertility AB - Little proof exists that taking a history aids in the evaluation of women with tubal factor infertility MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Editorial Material AV - English IS - 0015-0282 UR - ISI:000187969500006 L2 - VALIDITY SO - Fertility and Sterility 2004 ;81(1):18-18 11159 UI - 4492 AU - Huerta-Reyes M AU - Basualdo MD AU - Abe F AU - Jimenez-Estrada M AU - Soler C AU - Reyes-Chilpa R AD - Natl Autonomous Univ Mexico, Inst Chem, Dept Nat Prod, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, HIV AIDS Sect, Inst Biomed Sci, Mexico City 04510, DF, MexicoFukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, Fukuoka 8140180, JapanReyes-Chilpa, R, Natl Autonomous Univ Mexico, Inst Chem, Dept Nat Prod, Ciudad Univ, Mexico City 04510, DF, Mexico TI - HIV-1 inhibitory compounds from Calophyllum brasiliense leaves AB - The hexane, acetone and methanol extracts of Calophyllum brasiliense leaves were fractionated following a three bioassay guide: high HIV-1 RT inhibition, low cytotoxicity on MT2 cells and high inhibition of HIV-1 IIIb/LAV replication. This led to the isolation of three anti HIV-1 dipyranocoumarins: calanolides A and B and soulattrolide. In contrast, other isolated compounds such as apetalic acid, isoapetalic acid, a structural isomer of isoapetalic acid, friedelin, canophyllol and amentoflavone were devoid of HIV-1 RT inhibitory activity. Calanolide C was also obtained as a natural product and showed moderate inhibitory properties MH - Japan MH - Mexico|Distrito Federal PB - TOKYO: PHARMACEUTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0918-6158 UR - ISI:000223751400031 L2 - Calopyllum brasiliense;HIV-1 RT;calanolide;TYPE-1 REVERSE-TRANSCRIPTASE; NATURAL-PRODUCTS; COUMARINS; DERIVATIVES; GUTTIFERAE; EXTRACTS; ACIDS; PYRANOCOUMARINS; TEYSMANNII; LANIGERUM SO - Biological & Pharmaceutical Bulletin 2004 ;27(9):1471-1475 11160 UI - 5100 AU - Huerta-Yepez S AU - Vega M AU - Jazirehi A AU - Garban H AU - Hongo F AU - Cheng GH AU - Bonavida B AD - Univ Calif Los Angeles, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA 90095, USAHosp Infectol, CMN La Raza, IMSS, Unidad Invest Med Inmunol & Infectol, Mexico City, DF, MexicoUniv Calif Los Angeles, David Geffen Sch Med, Johnsson Comprehens Cacn Ctr, Dept Mol Pharmacol, Los Angeles, CA 90095, USABonavida, B, Univ Calif Los Angeles, Dept Microbiol Immunol & Mol Genet, 10833 Le Conte Ave,A2-060 CHS, Los Angeles, CA 90095 USA TI - Nitric oxide sensitizes prostate carcinoma cell lines to TRAIL-mediated apoptosis via inactivation of NF-kappa B and inhibition of Bcl-(xL) expression AB - Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has been shown to be selective in the induction of apoptosis in cancer cells with minimal toxicity to normal tissues and this prompted its potential therapeutic application in cancer. However, not all cancers are sensitive to TRAIL-mediated apoptosis and, therefore, TRAIL-resistant cancer cells must be sensitized first to become sensitive to TRAIL. Treatment of prostate cancer (CaP) cell lines (DU145, PC-3, CL-1, and LNCaP) with nitric oxide donors (e.g. (Z)-1-[2-(2-aminoethyl)-N-(2-ammonio-ethyl)amino]diazen-1-ium-1, 2- diolate ( DETANONOate)) sensitized CaP cells to TRAIL-induced apoptosis and synergy was achieved. The mechanism by which DETANONOate mediated the sensitization was examined. DETANONOate inhibited the constitutive NF-kappaB activity as assessed by EMSA. Also, p50 was S-nitrosylated by DETANONOate resulting in inhibition of NF-kappaB. Inhibition of NF-kappaB activity by the chemical inhibitor Bay 11-7085, like DETANONOate, sensitized CaP to TRAIL apoptosis. In addition, DETANONOate downregulated the expression of Bcl-2 related gene (Bcl-(xL)) which is under the transcriptional regulation of NF-kappaB. The regulation of NF-kappaB and Bcl-(xL) by DETANONOate was corroborated by the use of Bcl-(xL) and Bcl-kappaB reporter systems. DETANONOate inhibited luciferase activity in the wild type and had no effect on the mutant cells. Inhibition of NF-kappaB resulted in downregulation of Bcl-(xL) expression and sensitized CaP to TRAIL-induced apoptosis. The role of Bcl-(xL) in the regulation of TRAIL apoptosis was corroborated by inhibiting Bcl-(xL) function by the chemical inhibitor 2-methoxyantimycin A(3) and this resulted in sensitization of the cells to TRAIL apoptosis. Signaling by DETANONOate and TRAIL for apoptosis was examined. DETANONOate altered the mitochondria by inducing membrane depolarization and releasing modest amounts of cytochrome c and Smac/DIABLO in the absence of downstream activation of caspases 9 and 3. However, the combination of DETANONOate and TRAIL resulted in activation of the mitochondrial pathway and activation of caspases 9 and 3, and induction of apoptosis. These findings demonstrate that DETANONOate-mediated sensitization of CaP to TRAIL-induced apoptosis is via inhibition of constitutive NF-kappaB activity and Bcl-(xL) expression MH - USA MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 33 U4 - Biochemistry & Molecular Biology;Oncology;Cell Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0950-9232 UR - ISI:000222237300005 L2 - NF-kappa B;prostate cancer;nitric oxide;TRAIL;apoptosis;HUMAN TUMOR-CELLS; PROTEIN-KINASE-C; CANCER-CELLS; BINDING-PROTEIN; UP-REGULATION; DNA-BINDING; S-NITROSYLATION; BCL-X; CONSTITUTIVE ACTIVATION; TRANSCRIPTION FACTOR SO - Oncogene 2004 ;23(29):4993-5003 11161 UI - 6449 AU - Huerta A AU - Naumis GG AU - Wasan DT AU - Henderson D AU - Trokhymchuk A AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoIIT, Dept Environm Chem & Engn, Chicago, IL 60616, USABrigham Young Univ, Dept Chem & Biochem, Provo, UT 84602, USANatl Acad Sci, Inst Condensed Matter Phys, UA-76011 Lvov, UkraineHuerta, A, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Attraction-driven disorder in a hard-core colloidal monolayer AB - Monte Carlo simulation techniques were employed to explore the effect of short-range attraction on the orientational ordering in a two-dimensional assembly of monodisperse spherical particles. We find that if the range of square-well attraction is approximately 15% of the particle diameter, the dense attractive fluid shows the same ordering behavior as the same density fluid composed of purely repulsive hard spheres. Fluids with an attraction range larger than 15% show an enhanced tendency to crystallization, while disorder occurs for fluids with an attractive range shorter than 15% of the particle diameter. A possible link with the existence of "repulsive" and "attractive" states in dense colloidal systems is discussed. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 12 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000188081000044 L2 - SOLID TRANSITION; BEHAVIOR; SYSTEMS; DISKS SO - Journal of Chemical Physics 2004 ;120(3):1506-1510 11162 UI - 3244 AU - Huerta C AD - Inst Ecol, Dept Ecol & Compartamiento Anim, Xalapa 91070, Veracruz, MexicoNIAST, Dept Sericultural & Entomol, Suwon, South KoreaHuerta, C, Inst Ecol, Dept Ecol & Compartamiento Anim, Km 2-5 Antigua Carretera Coatepec 351, Xalapa 91070, Veracruz, Mexico TI - Fecundity and offspring survival of Copris tripartitus Waterhouse (Coleoptera, Scarabaeidae : Scarabaeinae) under laboratory rearing conditions AB - Through physiological ovary studies and the use of indoor systems, we improved egg production and offspring survival of Copris tripartitus Waterhouse. We also tested the effects of a lack of maternal care on offspring. Second larval instars died when brood balls were separated from females. Third instar larvae or pupal stage survival was significantly lower than that recorded in brood balls cared for by females. New adult body weights and pronotal sizes were also significantly lower in those emerged from brood balls separated from mothers than those cared for by them. The results shed light on the survival and reproduction of adults that emerged indoors as compared to those observed in populations under natural conditions MH - Mexico|Veracruz MH - South Korea PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000226769200004 L2 - NESTING-BEHAVIOR; PARENTAL CARE; DUNG BEETLE; BROOD SO - Coleopterists Bulletin 2004 ;58(4):501-507 11163 UI - 5157 AU - Huesca C AU - Luc G AU - Duhal N AU - Lacroix B AU - Fruchart J AU - Perez-Mendez O AD - Inst Nal Cardiol, Mexico City, DF, MexicoINSERM, U525, F-59045 Lille, FranceUniv Lille, Lille, France TI - Ciprofibrate increases synthesis and catabolism of HDL APO AI and AII in patients wiyh hyperlipidemia MH - France MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 1567-5688 UR - ISI:000221639000280 SO - Atherosclerosis Supplements 2004 ;5(1):65-65 11164 UI - 3589 AU - Hughes AR AU - Bando KJ AU - Rodriguez LF AU - Williams SL AD - Univ Calif Davis, Bodega Marine Lab, Bodega Bay, CA 94923, USAUniv Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616, USAInst Biol Ecol & Conservac, Zaponan 45070, Jalisco, MexicoHughes, AR, Univ Calif Davis, Bodega Marine Lab, POB 247, Bodega Bay, CA 94923 USA TI - Relative effects of grazers and nutrients on seagrasses: a meta-analysis approach AB - Recent large-scale seagrass declines have prompted experimental investigations of potential mechanisms. Although many studies have implicated eutrophication or reductions of epiphyte grazers in these declines, few experiments have simultaneously manipulated both factors to assess their relative effects. This study used meta-analyses of 35 published seagrass studies to compare the relative strength of 'top-down' grazer effects and 'bottom-up' nutrient effects on epiphyte biomass and seagrass above-ground growth rate, above-ground biomass, below-ground biomass, and shoot density. A surprising result was that seagrass growth and biomass were limited in situ by sediment nutrients; light limitation has been emphasized in the literature to date. Water column enrichments, which were correlated with increased epiphyte biomass, had strong negative effects on seagrass biomass. Grazers overall had a positive effect on shoot density, but negligible effects on seagrass biomass and growth rate. However, analyzing epiphyte grazers separately from other grazers revealed positive effects of grazing on seagrass response variables and corresponding negative impacts on epiphyte biomass. The positive effects of epiphyte grazers were comparable in magnitude to the negative impacts of water column nutrient enrichment, suggesting that the 2 factors should not be considered in isolation of each other. Until the determinants of epiphyte grazer populations are empirically examined, it will be difficult to address the contribution that overfishing and cascading trophic effects have had on seagrass decline. Because increases in water column nutrients are documented in many regions, efforts to reduce coastal eutrophication are an appropriate and necessary focus for the management and conservation of seagrass ecosystems MH - USA MH - Mexico|Jalisco PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 22 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000225791900007 L2 - seagrasses;meta-analysis;epiphyte;nutrients;grazers;management;eutrophication;top-down/bottom-up;EELGRASS ZOSTERA-MARINA; SUBMERGED AQUATIC VEGETATION; FOOD-WEB COMPLEXITY; THALASSIA-TESTUDINUM; EPIPHYTE COMMUNITIES; QUANTITATIVE REVIEWS; NITRATE ENRICHMENT; SHALLOW ESTUARIES; HALODULE-WRIGHTII; MACROALGAL BLOOMS SO - Marine Ecology-Progress Series 2004 ;282():87-99 11165 UI - 5661 AU - Hulsey CD AU - De Leon FJG AU - Johnson YS AU - Hendrickson DA AU - Near TJ AD - Univ Calif Davis, Dept Ecol & Evolut, Ctr Populat Biol, Davis, CA 95616, USAITCV, Lab Biol Integrat, Mexico City, DF, MexicoUniv Texas, Sect Integrat Biol, Austin, TX 78712, USAHulsey, CD, Univ Calif Davis, Dept Ecol & Evolut, Ctr Populat Biol, Davis, CA 95616 USA TI - Temporal diversification of Mesoamerican cichlid fishes across a major biogeographic boundary AB - The Mexican Neovolcanic Plateau sharply divides the vertebrate fauna of Mesoamerica where the climate of both the neotropics and temperate North America gradually blend. Only a few vertebrate groups such as the Heroine cichlids. distributed from South America to the Rio Grande in North America. are found both north and south of the Neovolcanic Plateau. To better understand the geography and temporal diversification of cichlids at this geologic boundary. we used mitochondrial DNA sequences of the cytochrome b (cyt h) gene to reconstruct the relationships of 52 of the approximately 80 species of Heroine cichlids in Mesoamerica. Our analysis suggests several cichlids in South America should be considered as part of the Mesoamerican Heroine clade because they and the cichlids north of the Isthmus of Panama are clearly Supported as monophyletic with respect to all other Neotropical cichlids. We also recovered a group containing species in Paratheraps + Paraneetrophus + Vieja as the sister clade to Herichthys. Herichthys is the only cichlid clade north of the Mexican Plateau and it is monophyletic. Non-parametric rate smoothing of cichlid cyt b sequence resulted in an estimated divergence time of approximately 6 million years for Herichthys. This temporal diversification is concordant with divergence times estimated for anurans in the genus Bufo, a group that exhibits a similar geographic distribution. Our results indicate the 5-million-year-old extension of the Mexican Neovolcanic Plateau to the Gulf Coast of Mexico has strongly influenced the current transition between the vertebrate faunas of the Neotropics and Nearctic. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000220948000026 L2 - CYTOCHROME-B GENE; AREA CLADOGRAMS; SEQUENCES; POECILIIDAE; SYSTEMATICS; SPECIATION; TELEOSTEI; EVOLUTION; MARKER; LIMITS SO - Molecular Phylogenetics and Evolution 2004 ;31(2):754-764 11166 UI - 4317 AU - Hurtado R AU - Gardea-Torresdey J AD - Colegio Frontera Norte AC, Ciudad Juarez, Chihuahua, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USAUniv Texas, Environm Sci & Engn PhD Program, El Paso, TX 79968, USAHurtado, R, Colegio Frontera Norte AC, PM Box 761,6248 Edgemere, El Paso, TX 79925 USA TI - Environmental evaluation of fluoride in drinking water at "Los altos de Jalisco," in the central Mexico region AB - Naturally occurring fluoride has been detected and quantified in drinking water in several cities of the 'Los Altos de Jalisco' (LAJ) region. LAJ is located in the northeastern part of the state of Jalisco-Mexico, covering an area of 16,4 10 km(2) with a population of 696,318 in 20 municipalities. Drinking water comes mainly from groundwater aquifers, located in the Trans-Mexican Volcanic Belt, which is a volcanic region characterized by hydrothermal activity. Results indicated that water supply from 42% of the municipalities had a fluoride concentration over the Mexican standards of 1.5 mg/L. It is important to notice that there are three cities, Lagos de Moreno (1.66-5.88 mg/L F-), Teocaltiche (3.82-18.58 mg/L F-), and Encamacion de Diaz (2.58-4.40 mg/L F-) where all water samples resulted in fluoride concentration over the maximum contaminant level. The total population from these three cities is over 122,000 inhabitants. Another important city with high levels of fluoride in the water supply was Tepatitlan de Morelos (2 wells with 6.54 and 13.47 mg/L F-). In addition to water supply, 30 samples of brand-name bottled water were tested. Surprisingly, 8 samples (27%) demonstrated fluoride level over the standards, mainly Agua de Lagos with 5.27 mg/L. Fluoridated table salt (200-300 mg/kg F-) is another important source of fluoride. A large number of people living in the region, mainly school children, might be under adverse health risk because they are consuming contaminated drinking water. It is well known that long-term exposure to water with high levels of fluoride produces severe health problems MH - Mexico|Chihuahua MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Toxicology U5 - J;Article AV - English IS - 1528-7394 UR - ISI:000224231900015 L2 - SAN-LUIS-POTOSI; ENDEMIC FLUOROSIS; EXPOSURE; RISK; GEOCHEMISTRY; CHILDREN SO - Journal of Toxicology and Environmental Health-Part A-Current Issues 2004 ;67(20-22):1741-1753 11167 UI - 3311 AU - Hurtazo HA AU - Agmo A AU - Paredes RG AD - UNAM, Inst Neurobiol, Queretaro, MexicoUniv Tromso, Dept Psychol, N-9001 Tromso, Norway TI - Infusions of lidocaine in the medial preoptic area/anterior hypothalamus (mPOA/AH), interrupts male sexual behavior in copulating rats MH - Mexico|Queretaro MH - Norway PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Behavioral Sciences;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0018-506X UR - ISI:000222517100045 SO - Hormones and Behavior 2004 ;46(1):92-92 11168 UI - 6451 AU - Huys I AU - Olamendi-Portugal T AU - Garcia-Gomez BI AU - Vandenberghe I AU - Van Beeumen J AU - Dyason K AU - Clynen E AU - Zhu SY AU - van der Walt J AU - Possani LD AU - Tytgat J AD - Katholieke Univ Leuven, Toxicol Lab, B-3000 Louvain, BelgiumInst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca, Morelos, MexicoState Univ Ghent, Lab Prot Biochem & Prot Engn, B-9000 Ghent, BelgiumPotchefstroom Univ Christian Higher Educ, Dept Physiol, ZA-2520 Potchefstroom, South AfricaKatholieke Univ Leuven, Lab Dev Physiol & Mol Biol, B-3000 Louvain, BelgiumTytgat, J, Katholieke Univ Leuven, Toxicol Lab, E Van Evenstr 4, B-3000 Louvain, Belgium TI - A subfamily of acidic alpha-K+ toxins AB - Three homologous acidic peptides have been isolated from the venom of three different Parabuthus scorpion species, P. transvaalicus, P. villosus, and P. granulatus. Analysis of the primary sequences reveals that they structurally belong to subfamily 11 of short chain alpha-K+-blocking peptides ( Tytgat, J., Chandy, K. G., Garcia, M. L., Gutman, G. A., Martin-Eauclaire, M. F., van der Walt, J. J., and Possani, L. D. ( 1999) Trends Pharmacol. Sci. 20, 444 - 447). These toxins are 36 - 37 amino acids in length and have six aligned cysteine residues, but they differ substantially from the other alpha-K+ toxins because of the absence of the critical Lys(27) and their total overall negative charge. Parabutoxin 1 (PBTx1), which has been expressed by recombinant methods, has been submitted to functional characterization. Despite the lack of the Lys27, this toxin blocks several Kv1-type channels heterologously expressed in Xenopus oocytes but with low affinities ( micromolar range). Because a relationship between the biological activity and the acidic residue substitutions may exist, we set out to elucidate the relative impact of the acidic character of the toxin and the lack of the critical Lys27 on the weak activity of PBTx1 toward Kv1 channels. To achieve this, a specific mutant named rPBTx1 T24F/V26K was made recombinantly and fully characterized on Kv1-type channels heterologously expressed in Xenopus oocytes. Analysis of rPBTx1 T24F/V26K displaying an affinity toward Kv1.2 and Kv1.3 channels in the nanomolar range shows the importance of the functional dyad above the acidic character of this toxin MH - Belgium MH - Mexico|Morelos MH - South Africa PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000188211300056 L2 - BUTHUS-MARTENSII KARSCH; POTASSIUM CHANNEL; SCORPION TOXINS; CRYSTAL-STRUCTURE; PEPTIDE INHIBITOR; BLOCKING PEPTIDE; NA+-CHANNELS; MAXI-K; VENOM; CHARYBDOTOXIN SO - Journal of Biological Chemistry 2004 ;279(4):2781-2789 11169 UI - 4034 AU - ias-Duarte A AU - Montoya AB AU - Hunt WG AU - Lafon-Terrazas A AU - Tafanelli R AD - Peregrine Fund, Boise, ID 83709, USAUniv Autonoma Chihuahua, Fac Zootecn, Chihuahua 31031, MexicoBorder Wildlife Consultants, Las Cruces, NM 88007, USAMacias-Duarte, A, Univ Arizona, 104 BioSci E, Tucson, AZ 85721, USA TI - Reproduction, prey, and habitat of the Aplomado Falcon (Falco femoralis) in desert grasslands of Chihuahua, Mexico AB - A breeding population of Aplomado Falcons (Falco femoralis) remains in the desert grasslands of Chihuahua, Mexico, despite their extirpation in the nearby southwestern United States. We monitored falcon reproduction at 35 territories during 1996-2002, a period of severe drought in the region. To test the influence of prey abundance and vegetation on falcon reproduction, we surveyed avian prey abundance through plot counts in 1998-2002 and characterized vegetation at each plot. Aplomado Falcon productivity declined from 1.57 fledglings per occupied territory in 1997 to 0.63 in 2002 at the larger of two study areas, a trend consistent with cumulative effects of consecutive years of low rainfall. Reproduction in the smaller area remained low throughout the study. Both productivity and incubation start date were significantly associated with prey bird abundance. Summer rain most likely influenced falcon reproduction by affecting seed abundance and therefore abundance of granivorous prey birds the following winter and spring. Falcons nested in open grasslands with sparse woody vegetation, an adaptation likely related to higher prey vulnerability and fewer predators. However, important prey birds were positively correlated with woody-plant density, which suggests that proximity of shrublands increased nest-site suitability. Received 17 October 2003, accepted 23 February 2004 MH - Mexico|Chihuahua MH - USA PB - LAWRENCE: AMER ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0004-8038 UR - ISI:000224756500008 L2 - SEMIDESERT GRASSLAND; RAPTOR COMMUNITY; CLIMATE-CHANGE; HISTORY; SUCCESS SO - Auk 2004 ;121(4):1081-1093 11170 UI - 6045 AU - Ibanez C AU - Juste J AU - Lopez-Wilchis R AU - Nunez-Garduno A AD - CSIC, Estac Biol Donana, Seville 41080, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Biol, Mexico City 09340, DF, MexicoUniv Michoacana San Nicolas Hidalgo, Fac Biol, Morelia 58040, Michoacan, MexicoIbanez, C, CSIC, Estac Biol Donana, Apdo 1056, Seville 41080, Spain TI - Habitat variation and jamming avoidance in echolocation calls of the sac-winged bat (Balantiopteryx plicata) AB - We have studied the effect of habitat and presence of conspecifics on echolocation characteristics of the emballonurid bat Balantiopteryx plicata. Calls during the search phase only showed differences between habitats in bandwidth, as has been found for other open-space bats. Characteristics of calls during the approach phase did change when bats entered open areas. Calls in the terminal phase showed no differences in the characters examined between habitats. Bats flying in groups shifted their peak frequency significantly, which maximized differences between individuals. These results are interpreted as an active mechanism of jamming avoidance. Bats flying in groups also tended to increase the mean of peak frequencies MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Spain PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 3 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000220140300008 L2 - Balantiopteryx plicata;echolocation;habitat;jamming avoidance;variation;HIPPOSIDERID BATS; EATING BATS; BEHAVIOR; SONAR; FIELD; PLASTICITY; ECOLOGY; SIGNALS; FLIGHT SO - Journal of Mammalogy 2004 ;85(1):38-42 11171 UI - 5410 AU - Ibanez J AU - gado-Mata C AU - Aylett R AU - Ruiz-Rodarte R AD - Univ Pompeu Fabra, Dept Tecnol, Barcelona 08003, Spain. Univ Salford, Ctr Virtual Environm, Salford M5 4WT, Lancs, England. Inst Tecnol Estudios Super Monterrey, Mexico City 52926, DF, Mexico TI - Don't you escape! I'll tell you my story AB - This paper makes two contributions to increase the engagement of users in virtual heritage environments by adding virtual living creatures. This work is carried out on the context of models of the Mayan cities of Palenque and Calakmul. Firstly, it proposes a virtual guide who navigates a virtual world and tells stories about the locations within it, bringing to them its personality and role. Secondly, it develops an architecture for adding autonomous animals to virtual heritage. It develops an affective component for such animal agents in order to increase the realism of their flocking behaviour and adds a mechanism for transmitting emotion between animals via virtual pheromones, modelled as particles in a free expansion gas MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlejesus.ibanez@tecn.upf.es C.Delgado@pgr.salford.ac.uk R.S.Aylett@salford.ac.uk caruiz@itesm.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600006 SO - 2004 ;():49-58 11172 UI - 3735 AU - Ibarra-Escamilla B AU - Kuzin EA AU - Pottiez O AU - Haus JW AU - Gutierrez-Zainos F AU - Grajales-Coutino R AU - Zaca-Moran P AD - INAOE, Dept Opt, Puebla 72000, MexicoFac Polytech Mons, Serv Electromagnet & Telecommun, FNRS, Belgian Fund Sci Res, B-7000 Mons, BelgiumUniv Dayton, Electro Opt Program, Dayton, OH 45469, USAIbarra-Escamilla, B, INAOE, Dept Opt, Luis Enrique Erro 1,AP 51 & 216, Puebla 72000, Mexico TI - Fiber optical loop mirror with a symmetrical coupler and a quarter-wave retarder plate in the loop AB - In this paper we report an experimental method to vary the transmission through a fiber optical loop mirror with a symmetrical coupler, highly twisted fiber and a quarter-wave (QW) retarder plate in the loop. We demonstrate that as the QW retarder plate is rotated it is possible to adjust the transmission over a wide range (from around 2% to around 82%) and that by adjusting the twist in the loop nearly ideal operation can be achieved. We provide a detailed theoretical analysis of the operating characteristics. (C) 2004 Elsevier B.V. All rights reserved MH - Belgium MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000225339500021 L2 - sagnac interferometer;optical fibers;NONLINEAR POLARIZATION ROTATION; LOW-BIREFRINGENCE FIBERS; SAGNAC INTERFEROMETER; BEAT LENGTH; LASER; PULSES SO - Optics Communications 2004 ;242(1-3):191-197 11173 UI - 5673 AU - Ibarra-Obando SE AU - Heck KL AU - Spitzer PM AD - CICESE, Ensenada, Baja California, MexicoDISL, Dauphin Isl, AL 36528, USAUniv S Alabama, Dept Marine Sci, Mobile, AL 36688, USAIbarra-Obando, SE, POB 434844, San Diego, CA 92143, USA TI - Effects of simultaneous changes in light, nutrients, and herbivory levels, on the structure and function of a subtropical turtlegrass meadow AB - The interactive effects of light, nutrients, and simulated herbivory on the structure and functioning of a subtropical turtlegrass bed were analyzed monthly from May to October 2001 in Perdido Bay, FL. For each of the three factors, two levels were evaluated in a factorial design with four replicates per treatment. The variables included: light, at ambient and 40% reduction; nutrients, at ambient and 2 x ambient concentrations; and herbivory, with no herbivory and simulated effects of a density of 15 sea urchins/m(2). In practice, light levels turned out to be 40% of surface PAR for ambient conditions, and 16% for shaded plots. Biomass removed as herbivory represented, on average, slightly less than 20% of the above-ground biomass. Separate three-way ANOVAs found no significant three-way interactions for any of the response variables, and few two-way interactions. There were no significant nutrient effects on turtlegrass above-ground biomass, although nutrient additions produced significant decreases in epibiont biomass, and net above-ground primary production (NAPP); significant increases in below-ground biomass during the peak of the growing season. Shoot density and average number of leaves per shoot increased significantly, while the UN ratio of the oldest leaf in the enriched plots decreased significantly. Light reduction significantly negatively affected all response variables, except below-ground biomass, shoot density and leaf length. Herbivory had isolated and inconsistent significant effects on below-ground biomass, shoot density, average number of leaves per shoot, and leaf length and width. Overall, our results indicate that nutrients are not limiting in Perdido Bay, and that nutrient additions had mostly detrimental effects. Light appeared to be the most important variable limiting seagrasses growth and abundance, and as with terrestrial plants, seagrasses seemed to respond more to light and nutrients than to herbivory. However, it is essential that additional tests of the single and interactive effects of the three key factors of light, nutrients and herbivory be done to evaluate the generality of our work, since our study is the first of its kind in seagrass meadows. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000220996700006 L2 - growth and abundance;seagrasses;simulated herbivory;Thalassia testudinum;top-down and bottom-up controls;EELGRASS ZOSTERA-MARINA; SEAGRASS THALASSIA-TESTUDINUM; URCHIN LYTECHINUS-VARIEGATUS; N-P RATIOS; HALODULE-WRIGHTII; PHOSPHORUS LIMITATION; SYRINGODIUM-FILIFORME; POSIDONIA-OCEANICA; DEPTH DISTRIBUTION; FLORIDA-KEYS SO - Journal of Experimental Marine Biology and Ecology 2004 ;301(2):193-224 11174 UI - 4539 AU - Ibarra-Perez FJ AU - costa-Gallegos JA AU - Enriquez BC AU - Castillo-Rosales A AU - Rosales-Serna R AU - Kelly JD AU - Singh SP AD - Michigan State Univ, Dept Crop & Soil Sci, E Lansing, MI 48824, USAUniv Idaho, Dept Plant Soil & Entomol Sci, Kimberly, ID 83341, USAINIFAP, Bean Program, Durango 34000, Dgo, MexicoAcosta-Gallegos, JA, Apartado Postal 112, Celaya 38000, Gto, Mexico TI - Registration of 'Negro Vizcaya' shiny black bean MH - Mexico|Durango MH - Mexico|Guanajuato MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000223586200053 SO - Crop Science 2004 ;44(5):1866-1867 11175 UI - 4989 AU - Ibarra-Sanchez LS AU - varado-Casillas S AU - Rodriguez-Garcia MO AU - Martinez-Gonzales NE AU - Castillo A AD - Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USAUniv Guadalajara, Dept Farmacobiol, Guadalajara 44430, Jalisco, MexicoCastillo, A, Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USA TI - Internalization of bacterial pathogens in tomatoes and their control by selected chemicals AB - The effect of different washing or sanitizing agents was compared for preventing or reducing surface and internal contamination of tomatoes by Salmonella Typhimurium and Escherichia coli O157:H7. The tomatoes were inoculated by dipping them in a bacterial suspension containing approximately 6.0 log CFU/ml of each pathogen and then rinsing them with tap water, hypochlorite solution (250 mg/liter), or lactic acid solution (2%, wt/vol). All treatments were applied by dipping or spraying, and solutions were applied at 5, 25, 35, and 55degreesC. With the exception of the lactic acid dip at 5degreesC, all treatments reduced both pathogens on the surfaces of the tomatoes by at least 2.9 cycles. No significantly different results were obtained (P > 0.05) with the dipping and spraying techniques. For internalized pathogens, the mean counts for tomatoes treated with water alone or with chlorine ranged from 0.8 to 2.1 log CFU/g. In contrast, after lactic acid spray treatment, all core samples of tomatoes tested negative for Salmonella Typhimuriurn and, except for one sample with a low but detectable count, all samples tested negative for E. coli O157:H7 with a plate count method. When the absence of pathogens was verified by an enrichment method, Salmonella was not recovered from any samples, whereas two of four samples tested positive for E. coli O157:H7 even though the counts were negative. Few cells of internalized pathogens were able to survive in the center of the tomato during storage at room temperature (25 to 28degreesC). The average superficial pH of tomatoes treated with tap water, chlorine, or lactic acid was 4.9 to 5.2, 4.1 to 4.3, and 2.5, respectively (P < 0.05), whereas no differences were observed in the internal pH (3.6 to 3.7) of the tomatoes treated with different sanitizers. The general practice in the tomato industry is to wash the tomatoes in chlorinated water. However, chlorine is rapidly degraded by organic matter usually present in produce. Therefore, lactic acid sprays may be a more effective alternative for decontaminating tomato surfaces. The use of warm (55degreesC) sprays could reduce pathogen internalization during washing MH - Mexico|Jalisco MH - USA PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000222559700004 L2 - ESCHERICHIA-COLI O157-H7; LISTERIA-MONOCYTOGENES; SALMONELLA-MONTEVIDEO; CHLORINATED WATER; ACID TOLERANCE; SURVIVAL; GROWTH; FRUIT; PH; DISINFECTION SO - Journal of Food Protection 2004 ;67(7):1353-1358 11176 UI - 5340 AU - Ibarra A AU - Hauben E AU - Butovsky O AU - Schwartz M AD - IMSS, Camina Res Ctr, Med Res Unit Neurol Dis, Dept Neuroimmunol, Mexico City, DF, MexicoWeizmann Inst Sci, Dept Neurobiol, IL-76100 Rehovot, IsraelIbarra, A, IMSS, Camina Res Ctr, Med Res Unit Neurol Dis, Dept Neuroimmunol, Mexico City, DF, Mexico TI - The therapeutic window after spinal cord injury can accommodate T cell-based vaccination and methylprednisolone in rats AB - Immune system activity has traditionally been considered harmful for recovery after spinal cord injury (SCI). Recent evidence suggests, however, that immune activity - and specifically autoimmune activity - is evoked by the insult, is beneficial if properly regulated and is amenable to boosting. Thus, for example, vaccination with an altered peptide ligand derived from myelin basic protein reduces the progressive degeneration of neurons that escaped the initial insult, thereby promoting recovery after SCI. As the steroid drug methylprednisolone (MP) is currently the only treatment available for patients with SCI, our purpose in the present study was to examine the mutual compatibility of the two treatments within the post-traumatic therapeutic window. We show, using rats of two different strains, that if MP is injected concomitantly with the therapeutic vaccination, the beneficial effect of the vaccination is diminished. However, if MP is given immediately after the insult and the vaccination 48 h later, MP does not detract from the beneficial effect of the vaccination. These results demonstrate that the therapeutic window after SCI can accommodate immediate administration of MP plus a delayed therapeutic vaccination MH - Israel MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000221789800008 L2 - inflammation;neurodegeneration;neuroprotection;paraplegia;protective autoimmunity;CENTRAL-NERVOUS-SYSTEM; PROTECTIVE AUTOIMMUNITY; NEURONAL SURVIVAL; SELF-ANTIGEN; OPTIC-NERVE; TRAUMA; RECOVERY; GLUTAMATE; PROSPECTS; CONTUSION SO - European Journal of Neuroscience 2004 ;19(11):2984-2990 11177 UI - 3869 AU - Ifrim C AU - Stinnesbeck W AU - Lopez-Oliva JG AD - Univ Karlsruhe, Inst Reg Geol, D-76131 Karlsruhe, GermanyHacienda Guadalupe, Fac Ciencias Tierra, Linares 67700, NL, MexicoIfrim, C, Univ Karlsruhe, Inst Reg Geol, Kaiserstr 12, D-76131 Karlsruhe, Germany TI - Maastrichtian cephalopods from Cerralvo, north-eastern Mexico AB - Sediments of the Mendez Formation near Cerralvo, north-eastern Mexico, yield an abundant and diverse Maastrichtian ammonite assemblage. A total of 23 species referred to 18 genera are described, in addition to the possible coleoid Naefia neogaeia. The assemblage is considered to be of early Maastrichtian age on the basis of ammonite occurrences and has been dated to the lower Maastrichtian biozone CF 7 by planktic foraminifera. None of the ammonite species has been reported previously from the Mendez Formation and most species are recorded from Mexico for the first time. In addition to faunal elements known from other Gulf of Mexico localities [Baculites ovatus, Nostoceras (N.) alternatum, N. (N.) colubriformis, N. (N.) rugosum, Solenoceras reesidei] the assemblage is characterized by cosmopolitan (e.g. Anagaudryceras politissimum, Desmophyllites diphylloides, Diplomoceras cylindraceum, Gaudryceras kayei, Phyllopachyceras forbesianum, and Pseudophyllites indra) and Tethyan elements [e.g. Brahmaites (Anabrahmaites) vishnu, Fresvillia constricta, Hauericeras rembda, Solenoceras texanum, Tetragonites superstes]. Some ammonite species have been known from the Indopacific region a [e.g. Fresvillia aff. F. teres, Neophylloceras (Hypophylloceras) hetonaiense, Zelandites varuna] and are clearly cold-water species. The composition of the assemblage contrasts with other Gulf of Mexico faunas which is related to bathymetry MH - Germany MH - Mexico|Nuevo Leon PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Paleontology U5 - J;Review AV - English IS - 0031-0239 UR - ISI:000225188600013 L2 - Ammonoidea;coleoidea;lower Maastrichtian;north-east Mexico;palaeobiogeographic distribution;HETEROMORPH AMMONITES; PLANKTIC FORAMINIFERA; NORTHWESTERN TUNISIA; WESTERN-AUSTRALIA; SEYMOUR-ISLAND; SOUTH-INDIA; FRANCE; BOUNDARY; AGE; PONDICHERRY SO - Palaeontology 2004 ;47():1575-1627 11178 UI - 4623 AU - Iglesias-Prieto R AU - Beltran VH AU - LaJeunesse TC AU - Reyes-Bonilla H AU - Thome PE AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mat & Limnol, Unidad Acad Puerto Morelos, Cancun 77500, QR, MexicoUniv Georgia, Dept Plant Biol, Athens, GA 30602, USAUniv Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149, USAIglesias-Prieto, R, Univ Nacl Autonoma Mexico, Inst Ciencias Mat & Limnol, Unidad Acad Puerto Morelos, Apdo Postal 1152, Cancun 77500, QR, Mexico TI - Different algal symbionts explain the vertical distribution of dominant reef corals in the eastern Pacific AB - Symbiotic reef corals occupy the entire photic zone; however, most species have distinct zonation patterns within the light intensity gradient. It is hypothesized that the presence of specific symbionts adapted to different light regimes may determine the vertical distribution of particular hosts. We have tested this hypothesis by genetic and in situ physiological analyses of the algal populations occupying two dominant eastern Pacific corals, over their vertical distribution in the Gulf of California. Our findings indicate that each coral species hosts a distinct algal taxon adapted to a particular light regime. The differential use of light by specific symbiotic dinoflagellates constitutes an important axis for niche diversification and is sufficient to explain the vertical distribution patterns of these two coral species MH - Mexico|Quintana Roo MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 37 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000223338600015 L2 - corals;niche diversification;symbiont diversity;light gradient;specificity;zooxanthellae;COMMUNITY STRUCTURE; DIVERSITY; PHOTOPROTECTION; PHOTOINHIBITION; ADAPTATION; ECOLOGY; ZOOXANTHELLAE; BIOGEOGRAPHY; FLUORESCENCE; ACCLIMATION SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2004 ;271(1549):1757-1763 11179 UI - 3655 AU - Iglesias AL AU - Aguirre G AU - Somanathan R AU - Parra-Hake M AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22510, BC, MexicoSomanathan, R, San Diego State Univ, 5500 Campanile Dr, San Diego, CA 92182 USA TI - New chiral Schiff base-Cu(II) complexes as cyclopropanation catalysts AB - A series of chiral Schiff base ligands 1-4, derived from (1R,2S)-(+)-cis-1-amino-2-indanol and other chiral amines with substituted salycilaldehydes were synthesized and transformed to the corresponding CU(II) complexes. Molecular structures of six Cu(II) complexes were determined by X-ray crystallographic studies. The structures show the metal ion in a distorted square planar geometry with dimeric or monomeric structures, depending on the ligand denticity. The potential use of these complexes in asymmetric Cyclopropanation was explored. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000225603400005 L2 - chiral;Schiff base;copper;cyclopropanation;catalysts;crystal structures;BASE COMPLEXES; HYDROGEN-PEROXIDE; CRYSTAL-STRUCTURE; METAL-COMPLEXES; COPPER(II); LIGANDS; POLYMERIZATION; BINUCLEAR; MANGANESE; SALICYLALDEHYDE SO - Polyhedron 2004 ;23(18):3051-3062 11180 UI - 5121 AU - Ilinski A AU - Silva-Andrade F AU - Shadrin E AU - Klimov V AD - Univ Autonoma Puebla, Inst Ciencias Benemerita, Puebla 72050, MexicoAcad Rusa Ciencias, Inst Fis Tecn, St Petersburg 194021, RussiaSilva-Andrade, F, Univ Autonoma Puebla, Inst Ciencias Benemerita, Priv 17 Norte 3417,Col San Miguel Hueyotlipan, Puebla 72050, Mexico TI - Variations in optical reflectivity in the semiconductor-metal phase transition of vanadium dioxide AB - Crystalline vanadium dioxide (VO2) is a material with a phase transition at a critical temperature of 67 degreesC [Metal-Insulator Transitions, Taylor & Francis, London, 1974, Nauka, Moscow, 1979; The Metal-Semiconductor Phase Transition and its Applications, Nauka, Leningrad, 1979, p. 183]. However this semiconductor-metal phase transition takes place at various temperatures T-c + DeltaT, depending on the grain size in the crystal [Fis. Tverd. Tela (St. Petersburg) 36 (1994) 1643]. This DeltaT in VO2 can have different values: 1-2 degreesC in a single crystal and 20-30 degreesC in a poly-crystalline layer. The inverse transition, from metal to semiconductor, takes place at T-c - DeltaT temperature. As a result, hysteresis of the physical properties exists with a width of 2DeltaT, and with various shapes of the ring [Tech. Phys. 47 (9) (2002) 1134]. In this work, we study the hysteresis loops of the optical reflectivity and conductivity of amorphous vanadium dioxide films around the semiconductor-metal phase transition. We demonstrate that a small number (2-3) of thermal cycles suppresses the phase transition, possibly due to the diffusion of oxygen from VO2-clusters into adjacent clusters, consisting of the lower oxides of a Magnelli-series. Results of these studies as well as the AFM-data, indicate the high optical quality of polycrystalline vanadium dioxide films obtained by annealing amorphous VO2-films, that can be used for application in interferometers and optical limiters. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000222219000058 L2 - FILMS SO - Journal of Non-Crystalline Solids 2004 ;338-40():266-268 11181 UI - 4594 AU - Illoldi-Rangel P AU - Sanchez-Cordero V AU - Peterson AT AD - Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoUniv Kansas, Nat Hist Museum, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USASanchez-Cordero, V, Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Aptdo Postal 70-153, Mexico City 04510, DF, Mexico TI - Predicting distributions of Mexican mammals using ecological niche modeling AB - Given the uneven and biased nature of present understanding of geographic distributions of mammal species, tools for extrapolating from what is known to a more general prediction would be most useful. We used the genetic algorithm for rule-set prediction (GARP) to generate ecological niche models that were then projected onto geography to predict potential geographic distributions for 17 mammal species of Insectivora, Chiroptera, Rodentia, and Artiodactyla in Oaxaca, Mexico. GARP depends on point occurrence localities from museum records of species, along with electronic maps describing features of climate, topography, and vegetation type. Point localities were divided in 2 sets: one of localities from museum records dated before 1960, which was used to generate the predicted distributions, and the other of localities of museum records resulting from recent inventories (post-1960), which was used to test model accuracy. Predicted distributions for 11 of 17 species were statistically significantly more coincident with independent test points than random expectations; tests for the remaining 6 species would have required larger numbers of test localities to establish significance. GARP is a robust tool for modeling species' geographic distributions, with excellent potential for applicability to strategies for conservation of mammals in Oaxaca and elsewhere MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 11 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000223457700009 L2 - biogeography;ecological niche;GARP;genetic algorithm;Geographic Information Systems;potential geographic distribution;POCKET MICE; ALGORITHMS; CLIMATE; RODENTS; SYSTEM; BIRDS SO - Journal of Mammalogy 2004 ;85(4):658-662 11182 UI - 3618 AU - Inguaggiato S AU - Taran Y AU - Grassa F AU - Capasso G AU - Favara R AU - Varley N AU - Faber E AD - Ist Nazl Geofis & Vulcanol, Seiz Palermo, I-90146 Palermo, ItalyUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Colima, Fac Ciencias, Colima, MexicoFed Inst Geosci & Nat Resources, Hannover, GermanyInguaggiato, S, Ist Nazl Geofis & Vulcanol, Seiz Palermo, Via Ugo La Malfa 153, I-90146 Palermo, Italy TI - Nitrogen isotopes in thermal fluids of a forearc region (Jalisco Block, Mexico): Evidence for heavy nitrogen from continental crust AB - The Jalisco Block (JB) is a geologically and tectonically complex part of northwestern Mexico characterized by active subduction-type volcanism, rifting, and old stable structures. Thermal springs and groups of springs are widely distributed over JB. Bubbling gas from seven thermal springs located within different tectonic environments of the JB was analyzed for He, Ne-20, and N-2 concentrations and delta(15)N ratios. All gases are N-2-dominant (>84%) with the exception of one sample ( Rio Purificacion), which has a significant CH4 content (about 50%). All collected gas samples are relatively high in He, up to 1500 ppm vol and with He-3/He-4 values ranging from 0.6 to 4.5 Ra. All measured nitrogen isotope ratios are heavier than air with delta(15)N values ranging from 0.5 to 5.0parts per thousand. The relative N-2 excess with respect to air-saturated water computed on the basis of N-2 and Ne-20 contents indicates the contribution of a nonatmospheric N-2 source. All the samples show a good correlation between delta(15)N and the relative excess of N-2 with delta(15)Nsimilar to+5.3parts per thousand for the maximum N-2 excess of 100%. Due to a presumed lack of seafloor sediment involved in the subduction process, such a delta(15)N positive value seems to reflect the addition to the fluids of a heavy nitrogen originating from metamorphism processes of rocks occurring within the overlying continental crust MH - Germany MH - Italy MH - Mexico|Colima MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1525-2027 UR - ISI:000225878500003 L2 - bubbling gases;forearc region;Jalisco Block-Mexico;nitrogen isotopes;subduction-related volcanism;geochemistry : isotopic composition/chemistry;marine geology and geophysics : plate tectonics;volcanology : hydrothermal systems;NATURAL-GAS ACCUMULATIONS; SEDIMENTARY ORGANIC-MATTER; MOLECULAR NITROGEN; SUBDUCTION; GENERATION; CALIFORNIA; SIGNATURE; METHANE; HELIUM; RATIOS SO - Geochemistry Geophysics Geosystems 2004 ;5(): 11183 UI - 4528 AU - Inguaggiato S AU - Taran Y AU - Capasso G AU - Favara R AU - Grassa F AU - Varley N AU - Faber E AD - Ist Nazl Geofis & Vulcanol, Sect Palermo, Palermo, ItalyUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Observ Colima, Colima, MexicoFed Inst Geosci & Nat Resources, D-3000 Hannover, Germany TI - Nitrogen isotopic composition of bubbling gases from some thermal springs at Jalisco Block, Mexico: Evidence of a N-15-enriched source MH - Germany MH - Italy MH - Mexico|Colima MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Meeting Abstract AV - English IS - 0016-7037 UR - ISI:000221923400471 SO - Geochimica et Cosmochimica Acta 2004 ;68(11):A281-A281 11184 UI - 6734 AU - Ioannides AA AU - Corsi-Cabrera M AU - Fenwick PBC AU - Portilla YD AU - Laskaris NA AU - Khurshudyan A AU - Theofilou D AU - Shibata T AU - Uchida S AU - Nakabayashi T AU - Kostopoulos GK AD - RIKEN, Brain Sci Inst, Lab Human Brain Dynam, Wako, Saitama 3510198, JapanUniv Nacl Autonoma Mexico, Fac Psicol, Mexico City 04510, DF, MexicoUniv Patras, Sch Med, Dept Physiol, GR-26110 Patras, GreecePsychiat Res Inst Tokyo, Dept Sleep Disorders Res, Tokyo 1568585, JapanIoannides, AA, RIKEN, Brain Sci Inst, Lab Human Brain Dynam, 2-1 Hirosawa, Wako, Saitama 3510198, Japan TI - MEG tomography of human cortex and brainstem activity in waking and REM sleep saccades AB - We recorded the magnetoencephalographic (MEG) signal from three subjects before, during and after eye movements cued to a tone, self-paced, awake and during rapid eye movement (REM) sleep. During sleep we recorded the MEG signal throughout the night together with electroencephalographic (EEG) and electromyographic (EMG) channels to construct a hypnogram. While awake, just prior to and during eye movements, the expected well time-locked physiological activations were imaged in pontine regions, with early 3 s priming. Activity in the frontal eye fields (FEF) was identified in the 300 ms before the saccade onset. Visual cortex activation occurred 200 ms after saccades. During REM, compared to the eyes closed awake condition, activity was higher in supplementary motor area (SMA) and lower in inferior parietal and precuneus cortex. Electro-occulographic (EOG) activity just prior to REM saccades correlated with bilateral pontine and FEF activity some 250-400 ms before REM saccade onset, which in turn was preceded 200 ms earlier by reciprocal activation of the pons and FEF. An orbitofrontal-amygdalo-parahippocampal-pontine sequence, possibly related to emotional activation during REM sleep, was identified in the last 100 ms leading to the REM saccade, but not linked to saccade initiation MH - Greece MH - Japan MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 17 U4 - Neurosciences U5 - J;Article AV - English IS - 1047-3211 UR - ISI:000187219900006 L2 - RAPID EYE-MOVEMENTS; VISUALLY GUIDED SACCADES; NEURONAL-ACTIVITY; PONTOGENICULOOCCIPITAL WAVES; ELECTRICAL-STIMULATION; FUNCTIONAL-ANATOMY; PARADOXICAL SLEEP; RHESUS-MONKEYS; PGO WAVES; AMYGDALA SO - Cerebral Cortex 2004 ;14(1):56-72 11185 UI - 6455 AU - Iriondo A AU - Premo WR AU - Martinez-Torres LM AU - Budahn JR AU - Atkinson WW AU - Siems DF AU - Guaras-Gonzalez B AD - Univ Colorado, Dept Geol Sci, Boulder, CO 80309, USAUS Geol Survey, Denver Fed Ctr, Denver, CO 80225, USAUniv Pais Vasco, Dept Geodinam, E-48080 Bilbao, SpainUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USAAlava Museum Nat Sci, Vitoria, SpainIriondo, A, UNAM, Ctr Geociencias, CP 76230, Juriquilla, Mexico TI - Isotopic, geochemical, and temporal characterization of Proterozoic basement rocks in the Quitovac region, northwestern Sonora, Mexico: Implications for the reconstruction of the southwestern margin of Laurentia AB - A detailed geochemical characterization of 19 representative Proterozoic basement rocks in the Quitovac region in northwestern Sonora, Mexico, has identified two distinct Paleoproterozoic basement blocks that coincide spatially with the previously proposed Caborca and "North America" blocks. New U-Pb zircon geochronology revises their age ranges, the Caborca (1.78-1.69 Ga) and "North America" (1.71-1.66 Ga) blocks at Quitovac, and precludes a simple age differentiation between them. In addition, Grenvillian-age granitoids (ca. 1.1 Ga), spatially associated with the Caborca block have been identified at Quitovac. Nd isotopes and major- and trace-element geochemistry support the distinction of these Paleoproterozoic blocks. Granitoids of the "North America" block are characterized by depleted epsilonNd values (3.4-3.9) and younger Nd model ages (18001740 Ma) and have lower K2O, Y, Rb, Ba, Th, REE, and Fe/Mg values than coeval rocks of the Caborca block. The Caborca block granitoids are likewise characterized by slightly less depleted epsilonNd (0.6-2.6) and older Nd model ages (2070-1880 Ma). Despite the subtle differences, granitoids from both the Caborca and "North America" blocks exhibit island are-like affinities. We propose that Proterozoic basement rocks from the Quitovac region are an extension of the Proterozoic crustal provinces in the southwestern United States. Specifically, rocks of the Caborca block exhibit an affinity to rocks of either the Yavapai province or the Mojave-Yavapai transition zone, whereas rocks of the "North America" block have signatures similar to those of the Mazatzal province or possibly the Yavapai province of Arizona. The new isotopic ages and geochemical data do not support the existence of the Late Jurassic Mojave-Sonora megashear at Quitovac, as originally proposed. However, the Quitovac region accounts only for a small fraction of the Proterozoic basement in Sonora, so these findings do not eliminate the possibility of a megashear elsewhere in northern Sonora. Our new data create the possibility of alternative hypotheses for the distribution of Paleoproterozoic crustal provinces in southwestern North America that affect reconstructions of the original southwestern margin of Laurentia, and reduce uncertainties in the configuration, timing, and existence of the Proterozoic supercontinent, Rodinia MH - Mexico|Queretaro MH - Spain MH - USA PB - DENVER: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000188249100011 L2 - isotopes;geochemistry;geochronology;tectonics;proterozoic;Sonora;Mexico;WESTERN NORTH-AMERICA; UNITED-STATES; CRUSTAL EVOLUTION; AUSTRALIA; ARIZONA; CONSTRAINTS; ANTARCTICA; CONNECTION; ACCRETION; TERRANES SO - Geological Society of America Bulletin 2004 ;116(1-2):154-170 11186 UI - 5566 AU - Ishii C AU - Shen T AU - Gavino RH AD - Kogakuin Univ, Dept Basic Engn Global Environm, Hachioji, Tokyo, JapanSophia Univ, Dept Engn Mech, Chiyoda Ku, Tokyo 102, JapanInst Technol Aguascalientes, Dept Elect Engn, Aguascalientes, Aguascalientes, MexicoIshii, C, Kogakuin Univ, Dept Basic Engn Global Environm, 2665-1 Nakano Cho, Hachioji, Tokyo, Japan TI - Design method for an adaptive robust controller with L-2-gain disturbance attenuation for nonlinear systems with uncertainty AB - A nonlinear feedback control design for the adaptive robust H-infinity control problem for nonlinear systems with gain bounded uncertainty is presented. An existing control scheme developed for nonlinear systems with relative degree of one is extended to the case where nonlinear systems have general relative degree. A Lyapunov function is constructed that ensures not only the stability of the closed-loop system but also satisfies the dissipation inequality ensuring L-2-gain performance. Then the controller can be obtained by the recursive use of the existing control scheme. A closed-form solution for the nonlinear H. control problem is provided without using a Hamilton-Jacobi inequality in the general relative degree case. Sufficient conditions which nonlinear systems should satisfy for solvability of the problem are provided MH - Japan MH - Mexico|Aguascalientes PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 1350-2379 UR - ISI:000221221700003 SO - Iee Proceedings-Control Theory and Applications 2004 ;151(2):152-157 11187 UI - 6130 AU - Islas-Flores I AU - Zuniga-Aguilar JJ AU - Rodriguez-Zapata LC AU - Carrillo-Pech M AU - Baizabal-Aguirre VM AU - Minero-Garcia Y AU - Hernandez-Sotomayor SMT AD - Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida 97200, Yucatan, VenezuelaUniv Michoacana, Fac Med Vet & Zootecn, Ctr Multidisciplinario Estud Biotecnol, Tarimbaro, Michoacan, MexicoIslas-Flores, I, Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Col Chuburna Hidalgo,Calle 43 130, Merida 97200, Yucatan, Venezuela TI - MAP kinase-like activity in transformed Catharanthus roseus hairy roots varies with culture conditions such as temperature and hypo-osmotic shock AB - Mito-en activated protein (MAP) kinase-like activity was determined in extracts obtained from transformed Catharanthus roseus hairy roots by the ability to phosphorylate myelin basic protein (MBP). Both in solution and in gel kinase assays showed variation in activity, depending on root developmental stage. In gel kinase assays, using the extract soluble fraction, revealed a 56 kDa polypeptide with phosphorylation activity on MBP. In addition, another 75 kDa polypeptide was observed in the particulate fraction. Immunodetection with monoclonal antibodies against ERK-1, a mammalian MAP kinase, and with anti-phosphotyrosine antibodies cross-reacted with the 56 kDa polypeptide, named SMK56. from the soluble fraction, suggesting that this polypeptide could be related with members of the MAP kinase family. Antibodies against the dually phosphorylated threonine-tyrosine motif, characteristic of active forms of MAP kinases, also cross-reacted with this 56 kDa polypeptide. Changes in the levels of SMK56 were detected within the first 30 min of root exposure to low temperatures or hypo-osmotic shock, suggesting that this protein may be involved in the perception of environmental changes. (C) 2003 Elsevier SAS. All rights reserved MH - Mexico|Michoacan MH - Venezuela PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0981-9428 UR - ISI:000189150800010 L2 - Catharanthus roseus hairy roots;hypo-osmotic and temperature stress;kinase activity;MAP kinase-like activity;ACTIVATED PROTEIN-KINASE; SIGNAL-TRANSDUCTION PATHWAYS; MYELIN BASIC-PROTEIN; ARABIDOPSIS-THALIANA; STRESS; PLANTS; CELLS; PHOSPHORYLATION; AUXIN; COLD SO - Plant Physiology and Biochemistry 2004 ;42(1):65-72 11188 UI - 4370 AU - Islas JR AU - Micheau JC AU - Buhse T AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca, Morelos, MexicoUniv Toulouse 3, CNRS, UMR 5623, Lab IMRCP, F-31062 Toulouse, FranceMicheau, JC, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ No 1001,Col Chamilpa, Cuernavaca, Morelos, Mexico TI - Kinetic analysis of self-replicating peptides: Possibility of chiral amplification in open systems AB - A simplified kinetic model scheme is presented that addresses the main reactions of two recently reported peptide self-replicators. Experimentally observed differences in the autocatalytic efficiency between these two systems-caused by variations in the peptide sequences-and the possible effect of chiral amplification under heterochiral reaction conditions were evaluated. Our numerical simulations indicated that differences in the catalytic performance are exclusively due to pronounced variations in the rate parameters that control the reversible and hydrophobic interactions in the reaction system but neither to alterations in the underlying reaction network nor to changes in the stoichiometry of the involved aggregation processes. Model predictions further demonstrated the possible existence of chiral amplification if peptide self-replication is performed under heterochiral reaction conditions. Pointing into the direction of a possible cause for biomolecular homochirality, it was found that in open flow reactors, keeping the system under non-equilibrium conditions, a remarkable amplification of enantiomeric excess could be achieved. According to our modeling, this is due to a chiroselective autocatalytic effect and a meso-type separation process both of which are assumed to be intrinsic for the underlying dynamics of heterochiral peptide self-replication MH - France MH - Mexico|Morelos PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Biology U5 - J;Article AV - English IS - 0169-6149 UR - ISI:000224130300005 L2 - amplification of enantiomeric excess;autocatalysis;biomolecular homochirality;chiroselective autocatalytic effect;kinetic analysis;peptide;self-replication;stereoselectivity;BIOMOLECULAR CHIRALITY; MOLECULAR REPLICATION; SYMMETRY-BREAKING; AUTOCATALYSIS; EVOLUTION; NETWORKS; ORIGIN; LIFE SO - Origins of Life and Evolution of the Biosphere 2004 ;34(5):497-512 11189 UI - 6608 AU - Islas S AU - Becerra A AU - Luisi PL AU - Lazcano A AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoETH Zentrum, Inst Polymere, CH-8092 Zurich, SwitzerlandLazcano, A, Univ Nacl Autonoma Mexico, Fac Ciencias, Apdo Postal 70-407,Cd Univ, Mexico City 04510, DF, Mexico TI - Comparative genomics and the gene complement of a minimal cell AB - The concept of a minimal cell is discussed from the viewpoint of comparative genomics. Analysis of published DNA content values determined for 641 different archaeal and bacterial species by pulsed field gel electrophoresis has lead to a more precise definition of the genome size ranges of free-living and host-associated organisms. DNA content is not an indicator of phylogenetic position. However, the smallest genomes in our sample do not have a random distribution in rRNA-based evolutionary trees, and are found mostly in ( a) the basal branches of the tree where thermophiles are located; and (b) in late clades, such as those of Gram positive bacteria. While the smallest-known genome size for an endosymbiont is only 450 kb, no free-living prokaryote has been described to have genomes < 1450 kb. Estimates of the size of minimal gene complement can provide important insights in the primary biological functions required for a sustainable, reproducing cell nowadays and throughout evolutionary times, but definitions of the minimum cell is dependent on specific environments MH - Mexico|Distrito Federal MH - Switzerland PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Biology U5 - J;Article AV - English IS - 0169-6149 UR - ISI:000187516600022 L2 - minimum gene set;minimal cellular genomes;genetic redundancy;DNA content;FIELD GEL-ELECTROPHORESIS; SELF-REPRODUCING VESICLES; ESCHERICHIA-COLI; BACTERIAL GENOMES; PROTEIN FAMILIES; DNA-REPLICATION; LIFE; EVOLUTION; MYCOPLASMA; SIZE SO - Origins of Life and Evolution of the Biosphere 2004 ;34(1-2):243-256 11190 UI - 5507 AU - itez-Hess ML AU - DiPaolo JA AU - varez-Salas LM AD - Ctr Invest & Estudios Avanzados, Dept Genet & Biol Mol, Lab Terapia Genica, Mexico City 07360, DF, MexicoNCI, Canc Res Ctr, NIH, Bethesda, MD 20892, USAAlvarez-Salas, LM, Ctr Invest & Estudios Avanzados, Dept Genet & Biol Mol, Lab Terapia Genica, Av IPN 2508, Mexico City 07360, DF, Mexico TI - Antisense activity detection by inhibition of fluorescence resonance energy transfer AB - Use of antisense nucleic acids to modulate expression of particular genes is a promising approach to the therapy of human papillomavirus type 16 (HPV-16)-associated cervical cancer. Understandably, evaluation of the in vivo performance of synthetic antisense oligodeoxynucleotides (AS-ODNs) or ribozymes is of ultimate importance to development of effective antisense tools. Here we report the use of a bacterial reporter system based on the inhibition of fluorescence resonance energy transfer (FRET) to measure the interaction of AS-ODNs with HPV-16 target nt 410-445, using variants of the green fluorescent protein (GFP). An optimal FRET-producing pair was selected with GFP as the donor and yellow fluorescent protein (YFP) as the acceptor molecule. Hybridization of AS-ODNs with a chimaeric mRNA containing the antisense target site flanked by GFP variants resulted in the inhibition of the FRET effect. Use of different linkers suggested that the amino acid content of the linker has no significant effect on FRET effect. Antisense accessibility, tested by RNaseH assays with phosphorothioated target-specific and mutant AS-ODNs, suggested a specific effect on the chimaeric mRNA. FRET inhibition measurements correlated with the presence of truncated proteins confirming true antisense activity over the target. Therefore, FRET inhibition may be used for the direct measurement of AS-ODNs activity in vivo. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 1522-7235 UR - ISI:000221474000005 L2 - fluorescence;antisense;energy transfer;green fluorescent protein;oligodeoxynucleotides;THEORETICAL APPROACH; SECONDARY STRUCTURE; MAMMALIAN-CELLS; GENE-EXPRESSION; IN-VIVO; PROTEIN; FRET; CALMODULIN; SELECTION; RNAS SO - Luminescence 2004 ;19(2):85-93 11191 UI - 4057 AU - Ivlev B AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoIvlev, B, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USA TI - Tunneling through nonstationary barriers and Euclidean resonance AB - The phenomenon of Euclidean resonance (a strong enhancement of quantum tunneling through a nonstationary potential barrier) is applied to disintegration of atoms and molecules through tunnel barriers formed by applied constant and time-dependent electric fields. There are two different channels for such disintegration, electronic and ionic. The electronic mechanism is associated with the ionization of a molecule into an electron and a positive ion. The required frequencies are in a wide range between 100 MHz and the infrared. This mechanism may constitute a method of selective destruction of chemical bonds. The ionic mechanism consists of dissociation of a molecule into two ions. Since an ion is more massive than an electron, the necessary frequency is about 1 MHz. This provides the theoretical possibility of a different method of isotope separation by radio frequency waves MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000224623000022 L2 - REAL-TIME; APPROXIMATION; FIELD; STIMULATION; DYNAMICS; WAVE SO - Physical Review A 2004 ;70(3): 11192 UI - 5814 AU - Ivlev B AU - Gudkov V AD - Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoIvlev, B, Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208, USA TI - New enhanced tunneling in nuclear processes AB - The small sub-barrier tunneling probability of nuclear processes can be dramatically enhanced by collision with incident charged particles. Semiclassical methods of theory of complex trajectories have been applied to nuclear tunneling, and conditions for the effects have been obtained. We demonstrate the enhancement of alpha particle decay by incident proton with energy of about 0.25 MeV. We show that the general features of this process are common for other sub-barrier nuclear processes and can be applied to nuclear fission MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000220607200119 L2 - ALPHA-DECAY; BREMSSTRAHLUNG; RADIATION; FUSION SO - Physical Review C 2004 ;69(3): 11193 UI - 3046 AU - Jablon EP AU - Lavaque A AU - Chaudhry N AU - Tom D AU - Alfaro DV AU - Quiroz-Mercado H AU - Liggett P AD - New England Retina Associates, Hamden, CT, USAYale Univ, Sch Med, New Haven, CT, USAUniv Nacl Autonoma Mexico, Retina Serv, Mexico City 04510, DF, MexicoNew York Hosp, Cornell Med Ctr, New York, NY 10021, USA TI - Combined transpupillary thermotherapy enhanced with indocyanine green and intravitreal triamcinolone acetonide for choroidal neovascularization in age-related macular degeneration MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338202301 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U582-U582 11194 UI - 3302 AU - Jaikumar P AU - Gale C AU - Page D AU - Prakash M AD - McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, CanadaNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoSUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAJaikumar, P, McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada TI - Distinguishing bare quark stars from neutron stars AB - Observations to date cannot distinguish neutron stars from self-bound bare quark stars on the basis of their gross physical properties such as their masses and radii alone. However, their surface luminosity and spectral characteristics can be significantly different. Unlike a normal neutron star, a bare quark star can emit photons, from its surface at super-Eddington luminosities for an extended period of time. We present a calculation of the photon bremsstrahlung rate from the bare quark star's surface, and indicate improvements that are required for a complete characterization of the spectrum. The observation of this distinctive photon spectrum would constitute an unmistakable signature of a strange quark star and shed light. on color superconductivity at stellar densities MH - Canada MH - Mexico|Distrito Federal MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000226621600008 L2 - STRANGE STARS; MATTER SO - International Journal of Modern Physics A 2004 ;19(31):5335-5342 11195 UI - 4681 AU - Jaikumar P AU - Gale C AU - Page D AU - Prakash M AD - McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, CanadaUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoSUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAJaikumar, P, McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada TI - Bremsstrahlung photons from the bare surface of a strange quark star AB - The photon emissivity from the bremsstrahlung process e(-)e(-)-->e(-)e(-)gamma occurring in the electrosphere at the bare surface of a strange quark star is calculated. For surface temperatures T<10(9) K, the photon flux exceeds that of e(+)e(-) pairs that are produced via the Schwinger mechanism in the presence of a strong electric field that binds electrons to the surface of the quark star. The average energy of photons emitted from the bremsstrahlung process can be around 0.5 MeV, which is comparable to that in e(+)e(-) pair annihilation. The observation of this distinctive photon spectrum would constitute an unmistakable signature of a strange quark star and shed light on color superconductivity at stellar densities MH - Canada MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000223233400007 L2 - FINITE-TEMPERATURE; MATTER SURFACES; EMISSION; PHASES SO - Physical Review D 2004 ;70(2): 11196 UI - 5331 AU - Jaimez J AU - Fente CA AU - Franco CM AU - Cepeda A AU - Vazquez BI AD - Univ Santiago de Compostela, Dpto Quim Anal Nutr & Bromatol, Lab Higiene & Inspecc Alimentos, Fac Vet, Lugo 27002, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Area Alimentos, Pachuca 42076, MexicoVazquez, BI, Univ Santiago de Compostela, Dpto Quim Anal Nutr & Bromatol, Lab Higiene & Inspecc Alimentos, Fac Vet, Campus Univ,S-N,Pabellon 4,Planta Baja, Lugo 27002, Spain TI - A survey of the fungal contamination and presence of ochratoxin A and zearalenone on Spanish feed and raw materials AB - The incidence of fungal contamination in 91 samples of feed and raw materials used for animal feeding in Spain has been studied. Sample analysis was accomplished in a new culture medium to which a beta-cyclodextrin had been added, and a comparison with other more usual culture media was performed. Ochratoxin A (OTA) and zearalenone (ZEA) contamination of all the samples was evaluated by RP-HPLC with fluorescence detection. The fungal genera found, such as Penicillium and Fusarium, included mycotoxigenic strains as OTA and ZEA (33.3 and 26.4% incidence respectively). One sample of corn and another of cotton seed were contaminated with levels of OTA above the 5 and/or 10 mug kg(-1) recommended by the legislation of several European countries, whereas none of the samples contaminated with ZEA surpassed the legislation limits suggested by the official agencies. (C) 2004 Society of Chemical Industry MH - Mexico|Hidalgo MH - Spain PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000221805300013 L2 - feed;raw material;contamination;fungi;ochratoxin;zearalenone;AFLATOXIN-PRODUCING STRAINS; MIXED POULTRY FEEDS; ASPERGILLUS-FLAVUS; NATURAL OCCURRENCE; FUSARIUM MYCOTOXINS; UNITED-KINGDOM; AGAR MEDIUM; MYCOFLORA; CORN; PRODUCTS SO - Journal of the Science of Food and Agriculture 2004 ;84(8):832-840 11197 UI - 4399 AU - Jancik V AU - Cabrera MMM AU - Roesky HW AU - Herbst-Irmer R AU - Neculai D AU - Neculai AM AU - Noltemeyer M AU - Schmidt HG AD - Univ Gottingen, Inst Inorgan Chem, D-37077 Gottingen, GermanyUniv Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoRoesky, HW, Univ Gottingen, Inst Inorgan Chem, Tammannstr 4, D-37077 Gottingen, Germany TI - Phosphane-catalyzed reactions of LAlH2 with elemental chalcogens; preparation of [LAl(mu-E)(2)AlL] [E = S, Se, Te, L = HC{C(Me)N(Ar)}(2), Ar=2,6-iPr(2)C(6)H(3)] AB - Addition of catalytic amounts of a phosphane to a reaction mixture containing LAlH2 [2; L = HC{C(Me)N(Ar)}(2), Ar = 2,6-iPr(2)C(6)H(3)] and elemental Se or Te resulted in the formation of poorly soluble [LAl(mu-Se)(2)AiL] (3) and [LAl(mu-Te)(2)AlL] (4), respectively. The sulfur analogue [LAl(mu-S)(2)AlL] (5) could not be obtained from the direct reaction of 2 with elemental sulfur; consequently, its synthesis was successfully achieved from the reaction of [LAlH2] and [LAl(SH)(2)]. A possible mechanism for the formation of [LAl(mu-Se)(2)AlL] and [LAl(mu-Te)(2)AlL] is discussed. The molecular structures of compounds 3-5 were determined by X-ray structure analyses. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) MH - Germany MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000223940100013 L2 - aluminum;catalysis;chalcogens;phosphanes;reaction mechanisms;LEWIS-BASE ADDUCTS; MOLECULAR-STRUCTURE; ALUMINUM; GALLIUM; ALANE; AL; TELLURIDES; INSERTION; CHEMISTRY; GALLANE SO - European Journal of Inorganic Chemistry 2004 ;(17):3508-3512 11198 UI - 4063 AU - Janga SC AU - Moreno-Hagelsieb G AD - UNAM, CIFN, Program Computat Genom, Cuernavaca 62100, Morelos, MexicoMoreno-Hagelsieb, G, Wilfrid Laurier Univ, Dept Biol, 75 Univ Ave W, Waterloo, ON N2L 3C5, Canada TI - Conservation of adjacency as evidence of paralogous operons AB - Most of the analyses on the conservation of gene order are limited to orthologous genes. However, the organization of genes into operons might also result in the conservation of gene order of paralogous genes. Thus, we sought computational evidence that conservation of gene order of paralogous genes represents another level of conservation of genes in operons. We found that pairs of genes within experimentally characterized operons of Escherichia coli K12 and Bacillus subtilis tend to have more adjacently conserved paralogs than pairs of genes at transcription unit boundaries. The fraction of same strand gene pairs corresponding to conserved paralogs averages 0.07 with a maximum of 0.22 in Borrelia burgdorferi. The use of evidence from the conservation of adjacency of paralogous genes can improve the prediction of operons in E.coli K12 by similar to0.27 over predictions using conservation of adjacency of orthologous genes alone MH - Canada MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000224704200012 L2 - ESCHERICHIA-COLI K-12; COMPLETE GENOME SEQUENCE; MICROBIAL GENOMES; GENE CLUSTERS; TRANSCRIPTIONAL REGULATION; MYCOPLASMA-PENETRANS; BIOSYNTHETIC GENES; BACILLUS-SUBTILIS; SELFISH OPERONS; PSI-BLAST SO - Nucleic Acids Research 2004 ;32(18):5392-5397 11199 UI - 4500 AU - Jankowski CK AU - Leclair G AU - Aumelas A AU - Gonzalez-de la Parra M AU - Jimenez-Estrada M AU - Tejada V AU - Chilpa-Reyes R AU - Belanger JMR AU - Pare JRJ AD - Univ Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, CanadaUniv Nacl Autonoma Mexico, Fac Quim, Dept Farmacia, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoEnvironm Canada, Microwave Assisted Prod Div, Ottawa, ON K1A 0H3, CanadaJankowski, CK, Univ Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, Canada TI - Preliminary study on the synthesis and high-resolution NMR analysis of Naproxen and Ibuprofen esters AB - The synthesis and NMR analysis of several diastereoisomeric Naproxyl-Naproxenate, Naproxyl-Ibuprofenate and Ibuprofyl-Naproxenate esters are reported. The NMR high resolution spectra run in presence of the chiral shift reagents and variable temperature analysis were done to study the dynamic properties of these esters MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 0 U4 - Spectroscopy U5 - J;Article AV - English IS - 0712-4813 UR - ISI:000223659200010 L2 - anti-inflammatory;ester;NSAID;variable temperature NMR spectroscopy;shift reagent NMR and molecular modelling;TOXICOLOGICAL SCREENING SYSTEM; CHIRAL INVERSION; GERMINATION BIOASSAY; ENANTIOMERIC PURITY; ORGANIC-SYNTHESIS; PRODRUGS; DRUGS SO - Spectroscopy-An International Journal 2004 ;18(3):485-500 11200 UI - 5967 AU - Jankowski CK AU - Aumelas A AU - Thuery P AU - Reyes-Chilpa R AU - Jimenez-Estrada M AU - Barrios H AU - Diaz E AD - Univ Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, CanadaCEA Saclay, DSM, DRECAM, SCM, F-91191 Gif Sur Yvette, FranceNatl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoJankowski, CK, Univ Moncton, Dept Chim & Biochim, Moncton, NB E1A 3E9, Canada TI - X-ray, H-1/C-13 2D and 3D NMR studies of the structures of Davallene and adipedatol, two triterpenes isolated from American Adiantum capillus-veneris AB - Two triterpenic compounds, Davallene 1 and Adipedatol 2 were isolated from the roots of Mexican Adiantum capillus-veneris L. (Adiantaceae). The structures of both compounds are discussed on the basis of new 2D and 3D NMR spectroscopic and single crystal X-ray diffraction data MH - Canada MH - France MH - Mexico|Distrito Federal PB - WARSAW: POLISH CHEMICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0137-5083 UR - ISI:000220175100008 L2 - triterpenes from Adiantum;NMR 1D and 2D of triterpenes;X-rays-2D;3D NMR of triterpenes;SENSITIVITY-ENHANCED DETECTION; MULTIPLE-QUANTUM NMR; FERN CONSTITUENTS; FILICAULIS BOISS; C-13; H-1; SPECTRA; ASSIGNMENTS; SAPONINS; PROTON SO - Polish Journal of Chemistry 2004 ;78(3):389-408 11201 UI - 5893 AU - Jansen E AU - Schafer W AU - Kirfel A AU - Palacios J AD - Univ Bonn, Mineralog & Petr Inst, DE-53115 Bonn, GermanyIPN, Escuela Super Fis & Math, Mexico City 07300, DF, MexicoJansen, E, Univ Bonn, Mineralog & Petr Inst, Poppelsdorfer Schloss, DE-53115 Bonn, Germany TI - On the development of copper textures - Neutron diffraction control over a period of 12 years - AB - The longtime stability of copper textures has been periodically monitored over 12 years by neutron diffraction pole figure measurements on a cold rolled and a partially recrystallized copper specimen, always using the same diffractometer and the same procedure of data analysis. The texture component fractions of 'rolled' copper suffered a continuous decrease over about 8 years and seem to reverse since then. The decrease is accompanied by recrystallization from initial 3 to 34 vol. % at present. Texture changes in the partially recrystallized specimen are less pronounced. In this sample, the fraction of random orientations changed from initially I I % to 31 % over the about first six years and followed by a decrease to 24 % at present MH - Germany MH - Mexico|Distrito Federal PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000189421300049 L2 - copper textures;neutron diffraction;pole figures;recrystallization texture;rolling texture SO - European Powder Diffraction Epdic 8 2004 ;443-4():239-242 11202 UI - 6315 AU - Jaque D AU - Enguita O AU - Luo ZD AU - Sole JG AU - Caldino GU AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Div Ciencias Basicas E Ingn, Mexico City 09340, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainChinese Acad Sci, Fujian Inst Res Struct Matter, Fujian 350002, Peoples R ChinaCaldino, GU, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Div Ciencias Basicas E Ingn, Av Michoacan & La Purisima S-N Col Vicentina,POB, Mexico City 09340, DF, Mexico TI - Up-conversion luminescence in the NdAl3(BO3)(4) (NAB) microchip laser crystal AB - The infrared to visible luminescence of the Nd3+ ion in the NdAl3(BO3)(4) (NAB) laser crystal has been investigated in the 730-840 nm excitation spectral range. Green, yellow and red up-converted emission bands centred at about 535, 595 and 675 nm are observed under excitation within the I-4(9/2)-->F-4(5/2) transition. All these emissions have been attributed to the transitions (4)G(7/2)-->I-4(9/2) (green), (4)G(7/2)--> I-4(11/2) (yellow) and (4)G(7/2)--> I-4(13/2) (red). From luminescence measurements and using a simple ratio equation model to fit the experimental data, it can be inferred that the (4)G(7/2) excited state is populated mainly via energy transfer up-conversion between Nd3+ ions in the F-4(3/2) metastable state. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Optics U5 - J;Article AV - English IS - 0925-3467 UR - ISI:000188534400003 L2 - up-conversion luminescence;NdAl3(BO3)(4);NEODYMIUM ALUMINUM BORATE; EXCITED-STATE ABSORPTION; ENERGY-TRANSFER; GARNET CRYSTAL; NDAL3 (BO3)4; EMISSION SO - Optical Materials 2004 ;25(1):9-15 11203 UI - 2886 AU - Jarvis MC AU - Miller AM AU - Sheahan J AU - Ploetz K AU - Ploetz J AU - Watson RR AU - Ruiz MP AU - Villapan CAP AU - Alvarado JG AU - Ramirez AL AU - Orr B AD - Univ Notre Dame, Notre Dame, IN 46556, USAMichigan Technol Univ, Sch Forestry & Wood Prod, Houghton, MI 49931, USAUniv Kentucky, Lexington, KY, USAUniv Veracruzana, Fac Biol, Veracruz, MexicoUniv Veracruzana, Inst Genet Forestal, Veracruz, MexicoJarvis, MC, Univ Notre Dame, Notre Dame, IN 46556, USA TI - Edible wild mushrooms of the Cofre de Perote region, Veracruz, Mexico: An ethnomycological study of common names and uses AB - A field study in the Cofre de Perote region found that edible mushrooms play an important role in the socio-economics activities of the local population. Several very old common names indicate a long-standing traditional knowledge about this regional resource. Recent changes in marketing mushrooms are evident MH - Mexico|Veracruz MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0013-0001 UR - ISI:000227430400008 L2 - edible mushrooms;useful mushrooms;Cofre de Perote;ethnomycology;Veracruz SO - Economic Botany 2004 ;58():S111-S115 11204 UI - 6150 AU - Jasso AR AU - Duarte MLB AU - Allen NS AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoManchester Metropolitan Univ, Dept Chem & Mat, Manchester M15 6BH, Lancs, EnglandJasso, AR, Ctr Invest Quim Aplicada, Blvd Enrique Reyna H-140, Saltillo 25100, Coahuila, Mexico TI - Synergistic effect between hindered amine light stabilizers and partially hindered oligomeric amines in polyethylene AB - The synergistic effect between novel synthesized oligomeric amines and a commercial hindered amine light stabilizer (Chimassorb 944) was studied in medium-density polyethylene (MDPE). Mixtures of the synthesized oligomeric amines and commercial additives were prepared at different concentrations and then were evaluated by ultraviolet and thermal aging. The evaluation was carried out on films prepared by compression molding, and the oxidation rates were monitored with Fourier transform infrared, which was used to measure the formation of different functional groups: carbonyl, vinylic, and hydroperoxide. The data showed that, independently of the concentration of the commercial additives, when they were combined with oligomeric amines, they produced a synergistic effect with a magnitude depending on the MDPE aging conditions and the additive concentrations. (C) 2004 Wiley Periodicals, Inc MH - United Kingdom MH - Mexico|Coahuila MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000189150900036 L2 - polyethylene (PE);charge transfer;polyamines;HALS;stabilization;MECHANISM; FILMS SO - Journal of Applied Polymer Science 2004 ;92(1):280-287 11205 UI - 4986 AU - Jauregue-Renaud R AU - Kim YS AU - Man'ko MA AU - Moya-Cessa H AD - UNAM, Inst Phys, Mexico City, DF, MexicoUniv Maryland, College Pk, MD 20742, USAPN Lebedev Phys Inst, Moscow 117924, RussiaINAOE, Coordinac Opt, Puebla, MexicoJauregue-Renaud, R, UNAM, Inst Phys, Mexico City, DF, Mexico TI - Squeezed states and uncertainty relations MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Russia MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Optics;Physics, Applied U5 - J;Editorial Material AV - English IS - 1464-4266 UR - ISI:000222591700001 SO - Journal of Optics B-Quantum and Semiclassical Optics 2004 ;6(6):S453-S454 11206 UI - 5033 AU - Jeffres TD AU - Loya P AD - Univ Michoacana, Morelia, Michoacan, MexicoSUNY Binghamton, Dept Math, Binghamton, NY 13902, USAJeffres, TD, Univ Michoacana, Morelia, Michoacan, Mexico TI - Regularity of the heat operator on a manifold with cylindrical ends AB - We study mapping properties of the heat operator e(tA) of an m-th order elliptic b-differential operator in appropriately defined spaces of whole and fractional (Holder) derivatives. An application is made to short time existence of solutions to certain semilinear parabolic equations MH - Mexico|Michoacan MH - USA PB - BERKELEY: PACIFIC JOURNAL MATHEMATICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0030-8730 UR - ISI:000222358500006 SO - Pacific Journal of Mathematics 2004 ;215(2):331-345 11207 UI - 6618 AU - Jiang KY AU - Schadler LS AU - Siegel RW AU - Zhang XJ AU - Zhang HF AU - Terrones M AD - Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USARensselaer Polytech Inst, Rensselaer Nanotechnol Ctr, Troy, NY 12180, USAPacific NW Natl Lab, Richland, WA 99352, USAWashington State Univ, Dept Phys, Richland, WA 99352, USAIPICyT, Adv Mat Dept, San Luis Potosi 78210, MexicoJiang, KY, Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA TI - Protein immobilization on carbon nanotubes via a two-step process of diimide-activated amidation AB - Ferritin and bovine serum albumin (BSA) proteins are chemically bonded to nitrogen-doped multi-walled carbon nanotubes (CNx MWNTs) through a two-step process of diimide-activated amidation. First, carboxylated CNx MWNTs were activated by N-ethyl-N'-(3-dimethylaminopropyl) carbodiimide hydrochloride ( EDAC), forming a stable active ester in the presence of N-hydroxysuccinimide ( NHS). Second, the active ester was reacted with the amine groups on the proteins of ferritin or BSA, forming an amide bond between the CNx MWNTs and proteins. This two-step process avoids the intermolecular conjugation of proteins, and guarantees the uniform attachment of proteins on carbon nanotubes. TEM and AFM measurements clearly confirmed the successful attachment. This approach provides a universal and efficient method to attach biomolecules to carbon nanotubes at ambient conditions MH - USA MH - Mexico|San Luis Potosi PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 40 U4 - Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0959-9428 UR - ISI:000187533200005 L2 - BIOSENSORS; ARRAYS; ROUTE SO - Journal of Materials Chemistry 2004 ;14(1):37-39 11208 UI - 4076 AU - Jiang X AU - Huang PW AU - Zhong WM AU - Tan M AU - Farkas T AU - Morrow AL AU - Newburg DS AU - Ruiz-Palacios GM AU - Pickering LK AD - Cincinnati Childrens Hosp Med Ctr, Div Infect Dis, Ctr Biostat & Epidemiol, Dept Pediat, Cincinnati, OH 45229, USAUniv Cincinnati, Coll Med, Cincinnati, OH, USAUniv Massachusetts, Shriver Res Ctr, Waltham, MA, USANatl Inst Med Sci & Nutr, Mexico City, DF, MexicoCtr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USAJiang, X, Cincinnati Childrens Hosp Med Ctr, Div Infect Dis, Ctr Biostat & Epidemiol, Dept Pediat, 3333 Burnet Ave, Cincinnati, OH 45229 USA TI - Human milk contains elements that block binding of noroviruses to human histo-blood group antigens in saliva AB - Noroviruses (NVs) recognize human histo-blood group antigens (HBGAs) as receptors. We characterized the interaction of human milk samples with recombinant virus-like particles representing VA387, Norwalk, VA207, and MOH. Milk samples from 60 healthy women were tested for human HBGAs and for their ability to block the binding of NVs. Fifty-four women were secretors (Se+), and 6 were nonsecretors (Se-). No women had detectable A or B antigens in their milk samples. All 54 Se+ milk samples, but 0 of 6 Se- milk samples, blocked VA387 and Norwalk virus (Se+ binders) from binding to saliva samples. All 6 Lewis-positive Se- milk samples blocked binding to VA207, and variable blocking activities were exhibited by the Se+ milk samples. No milk samples blocked the binding of MOH to A and B antigens. Secretor and Lewis, but not A or B antigens, were present in human milk and were responsible for blocking NV binding to receptors and therefore are likely to be decoy receptors that protect breast-fed infants from NV infection MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000224700800019 L2 - NORWALK VIRUS-INFECTION; BREAST-FED INFANTS; ACUTE GASTROENTERITIS; HUMAN CALICIVIRUSES; MOLECULAR-DETECTION; BACULOVIRUS EXPRESSION; VIRAL GASTROENTERITIS; YOUNG-CHILDREN; DIARRHEA; OLIGOSACCHARIDES SO - Journal of Infectious Diseases 2004 ;190(10):1850-1859 11209 UI - 4428 AU - Jiang X AU - Huang PW AU - Zhong WM AU - Morrow AL AU - Ruiz-Palacios GM AU - Pickering LK AD - Cincinnati Childrens Hosp, Med Ctr, Div Infect Dis, Cincinnati, OH 45229, USA. Cincinnati Childrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USA. Inst Nacl Ciencias Med & Nutr, Dept Infectol, Mexico City, DF, Mexico. Ctr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USA TI - Human milk contains elements that block binding of noroviruses to histo-blood group antigens in saliva MH - Mexico|Distrito Federal MH - USA T3 - PROTECTING INFANTS THROUGH HUMAN MILKAdvances in experimental medicine and biology PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U4 - Medicine, Research & Experimental U5 - S;Article NT - SEnglishArticlejason.jiang@cchmc.org ardythe.morrow@cchmc.org1233 SPRING ST, NEW YORK, NY 10013 USAADVAN EXPERIMENT MED BIOLBAU75 AV - English IS - 0065-2598 UR - ISI:000223641000059 SO - 2004 ;():447-450 11210 UI - 4682 AU - Jimenez-Andrade JM AU - Zhou ST AU - Du JH AU - Yamani A AU - Grady JJ AU - Castaneda-Hernandez G AU - Carlton SM AD - Univ Texas, Med Branch, Marine Biomed Inst, Galveston, TX 77555, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Secc Externa Farmacol, Mexico City, DF, MexicoUniv Texas, Med Branch, Dept Anat & Neurosci, Galveston, TX 77555, USAUniv Texas, Med Branch, Dept Prevent Med & Community Hlth, Galveston, TX 77555, USACarlton, SM, Univ Texas, Med Branch, Marine Biomed Inst, 301 Univ Blvd, Galveston, TX 77555 USA TI - Pro-nociceptive role of peripheral galanin in inflammatory pain AB - We investigated the peripheral function of galanin (GAL) in capsaicin (CAP)-induced inflammatory pain. Intraplantar GAL (0.1 ng/mul) alone does not produce nociceptive behaviors. However, ipsilateral but not contralateral GAL at low doses (0.1 ng/mul) significantly increases CAP-evoked nociceptive behaviors approximately twofold. This effect is attributed to activation of peripheral GAL receptor 2 (GalR2) because a selective GalR2 agonist (AR-M1896) mimics the pro-nociceptive actions of GAL. Recording from nociceptors confirms that GAL does not modify activity of nociceptors but markedly enhances CAP-induced excitation of these fibers. CAP produces a discharge rate of 0.15 +/- 0.05 impulses/s which increases to 0.54 +/- 0.17 impulses/s following CAP + GAL. Immunohistochemical studies indicate GalR2 are highly expressed (65.8%) in L5 dorsal root ganglion (DRG) cells. Also, 44.5% GalR2-positive DRG neurons label for the capsaicin receptor (vanilloid receptor 1, VR1) while 61.7% of VR1-positive DRG neurons label for GalR2; 28.1% of total DRG neurons are double-labeled supporting the hypothesis that GAL-induced effects are mediated by GalR2 on capsaicin-sensitive primary afferents. Furthermore, 68.0% unmyelinated and 23.1% myelinated digital nerve axons label for GalR2, indicating the receptor is transported out to the periphery. Immunostaining for GAL peptide in digital nerves labels 46.4% unmyelinated and 27.1% myelinated axons, suggesting that afferents are a major source of ligand for peripheral GalR2. These results suggest that peripheral GAL has an excitatory role in inflammatory pain, likely mediated by peripheral GalR2 and that GAL can modulate VR1 function. (C) 2004 International Association for the Study of Pain. Published by Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Anesthesiology;Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0304-3959 UR - ISI:000223232800003 L2 - cutaneous inflammatory pain;pain mechanisms;DORSAL-ROOT GANGLION; C-FIBER STIMULATION; INTRATHECAL GALANIN; SPINAL-CORD; NERVE INJURY; VANILLOID RECEPTOR-1; REFLEX EXCITABILITY; FLEXOR REFLEX; SUBSTANCE-P; RAT SO - Pain 2004 ;110(1-2):10-21 11211 UI - 3406 AU - Jimenez-Barbero J AU - Canada J AU - Cuevas G AU - Fernandez-Alonso C AU - Asensio JL AU - Corzana F AD - CSIC, Ctr Invest Biol, Madrid 28040, SpainUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Computational insights on the molecular recognition processes between carbohydrates and proteins. A comparison with NMR experimental observations MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655600987 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U264-U264 11212 UI - 6003 AU - Jimenez-Hidalgo I AU - Virgen-Calleros G AU - Martinez-de la Vega O AU - Vandemark G AU - Olalde-Portugal V AD - IPN, Ctr Invest & Estudios Avanzados, Dept Biochem & Biotechnol, Irapuato 36500, MexicoCtr Univ Ciencias Biol & Agropecuarias, Las Agujas Nextipac 45110, Jalisco, MexicoIPN, Ctr Invest & Estudios Avanzados, Genet Engn Dept, Irapuato 36500, MexicoUSDA ARS, Prosser, WA 99350, USAOlalde-Portugal, V, IPN, Ctr Invest & Estudios Avanzados, Dept Biochem & Biotechnol, Unidad Irapuato Km 9-6, Irapuato 36500, Mexico TI - Identification and characterisation of bacteria causing soft-rot in Agave tequilana AB - Agave tequilana is the raw material for the production of the alcoholic beverage tequila. A bacterial disease has affected the A. tequilana crop in recent years. Previous reports based on colony and cell morphology, Gram stain and potato rot indicated that Erwinia sp. is the main pathogen. We isolated a several bacterial isolates capable of producing soft-rot symptoms in greenhouse pathogenicity assays. An extensive characterisation involving pathogenicity tests, fatty acid profile, metabolic and physiological properties, ribosomal DNA sequence and intergenic transcribed spacer amplification (ITS-PCR) and restriction banding pattern (ITS-RFLP) was made of each isolate. Three different species: Erwinia cacticida, Pantoea agglomerans and Pseudomonas sp. were identified. Fatty acid and metabolic profiles gave low similarity values of identification but 16S rDNA sequence, ITS-PCR and ITS-RFLP confirmed the identification of E. cacticida. In the phylogenetic tree, E. cacticida from blue agave was grouped neither with E. cacticida type strains nor with Erwinia carotovora. This is the first report that associates E. cacticida with A. tequilana soft-rot symptoms MH - Mexico|Guanajuato MH - Mexico|Jalisco MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0929-1873 UR - ISI:000220204500011 L2 - Agave tequilana;Erwinia cacticida;Pantoea agglomerans;Pseudomonas sp.;soft-rot;16S RIBOSOMAL-RNA; FATTY-ACID COMPOSITION; AVENAE SUBSP CITRULLI; ENTEROBACTER-AGGLOMERANS; PHYLOGENETIC POSITION; MOLECULAR-GENETICS; SP-NOV; CAROTOVORA; STRAINS; ATROSEPTICA SO - European Journal of Plant Pathology 2004 ;110(3):317-331 11213 UI - 4801 AU - Jimenez-Mier J AU - Ederer DL AU - Schuler T AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoTulane Univ, Dept Phys, New Orleans, LA 70118, USAJimenez-Mier, J, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Chemical effects in the manganese 3s -> 2p x-ray emission that follows resonant and nonresonant photon production of a 2p hole AB - Spectra for the manganese 3s-->2p x-ray emission after resonant and nonresonant photon excitation of a 2p electron are presented for metallic manganese, MnF2, MnO, and LaMnO3. The absorption and emission spectra are compared with the results of free-ion calculations for Mn2+ and Mn3+. The experimental absorption spectrum of MnF2 is in very good agreement with the calculation for Mn2+, while the absorption of the other compounds is found to be a superposition of Mn2+ and Mn3+. There are noticeable differences among the compounds, both in the relative positions and intensities of the emission peaks. The resonant emission spectra from MnF2 is dominated by decay from the 2p(5)3d(6) resonant configuration, while "normal" fluorescence is found to predominate in LaMnO3. In metallic manganese and MnO the emission spectra are well described as a superposition of these two extreme cases MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000222996700063 L2 - ABSORPTION-SPECTROSCOPY; ELECTRONIC-STRUCTURE; FLUORESCENCE SPECTROSCOPY; TRANSITION-METALS; SCATTERING; STATES; MN SO - Physical Review B 2004 ;70(3): 11214 UI - 4383 AU - Jimenez-Perez A AU - Wang Q AD - Massey Univ, Inst Nat Resources, Entomol & IPM Lab, Palmerston North, New ZealandIPN, Ctr Desarrollo Prod Biot, Yautepec 62730, Morelos, MexicoWang, Q, Massey Univ, Inst Nat Resources, Entomol & IPM Lab, Private Bag 11222, Palmerston North, New Zealand TI - Effect of body weight on reproductive performance in Cnephasia jactatana (Lepidoptera : Tortricidae) AB - The larger-the-better theory predicts that fitness is positively linearly associated with body size or weight. We used the kiwifruit pest, Cnephasia jactatana Walker, to test whether larger insects perform better reproductively. We divided our insect population into three weight groups: light, average, and heavy, and assessed the reproductive performance of 9 breeding treatments ( 3 male weights x 3 female weights). Female fecundity is positively correlated with female body weight in low and average weight groups. There is no such correlation in the heavy weight group, suggesting that further weight increase has no fitness gain for females. The positive linear relationship between fertility and female weight in all weight groups may be attributed to the fact that permanently paired heavy females are more likely to remate, gaining more sperm and thus higher fertility. However, the previous study also indicates that mated females are less likely to be mated again when males have a choice. Therefore, in the natural environment the realized fertility may still follow an asymptotical pattern similar to the fecundity in relation to female weight. Males' beneficial effect on female reproductive outputs increases linearly with their body weight in all weight groups, indicating that male reproductive performance fits the larger-the-better theory. Fertility rate is not affected by the body weight of either sex. Heavy and average females lay eggs earlier and have higher daily fecundity and fertility than light females. Females of all weight groups have similar oviposition and postoviposition periods. Male weight and female - male weight interactions have no effect on oviposition parameters MH - Mexico|Morelos MH - New Zealand PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0892-7553 UR - ISI:000224028800008 L2 - Cnephasia jactatana;body weight;fecundity;fertility;sexual selection;BROWN APPLE MOTH; INTRASPECIFIC VARIATION; MATING DISRUPTION; EGG SIZE; FECUNDITY; SELECTION; HISTORY; BUTTERFLIES; EVOLUTION; KIWIFRUIT SO - Journal of Insect Behavior 2004 ;17(4):511-522 11215 UI - 4385 AU - Jimenez-Perez A AU - Wang Q AD - Massey Univ, Inst Nat Resources, Entomol & IPM Lab, Palmerston North, New ZealandIPN, Ctr Desarrollo Prod Biot, Yautepec 62730, Morelos, MexicoWang, Q, Massey Univ, Inst Nat Resources, Entomol & IPM Lab, Private Bag 11222, Palmerston North, New Zealand TI - Male remating behavior and its effect on female reproductive fitness in Cnephasia jactatana Walker (Lepidoptera : Tortricidae) AB - Male remating behavior and its effect on the female reproductive fitness of a New Zealand leafroller, Cnephasia jactatana, were investigated in the laboratory. With a recovery period of at least 24 h between matings, most males were able to mate four times and only about 25% could mate six times during their lifespan. Only 5% of males managed to mate twice within 1 day. Mated males transferred 31-51% smaller spermatophores than virgin males. When mating with a mated male, the female was subject to a 20-51% and 23-51% reduction in fecundity and fertility, respectively. With the increasing number of matings her partner had achieved before mating with her, the female's fertility declined significantly faster than fecundity. Courtship period and mating duration remained similar regardless of the male's mating history but males required increasingly longer latency to start courtship display with the increasing number of matings achieved MH - Mexico|Morelos MH - New Zealand PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0892-7553 UR - ISI:000224028900009 L2 - male mating behavior;spermatophore size;fecundity;courtship;copula duration;PIERIS-NAPI; BODY-SIZE; SEXUAL SELECTION; MATING-BEHAVIOR; CODLING MOTH; MATE CHOICE; NOCTUIDAE; INVESTMENT; SUCCESS; BUTTERFLIES SO - Journal of Insect Behavior 2004 ;17(5):685-694 11216 UI - 4960 AU - Jimenez-Perez A AU - Wang Q AD - Massey Univ, Inst Nat Resources, Palmerston North, New ZealandWang, Q, IPN, Ctr Desarrollo Prod Biot, Km 8-5 Carr, Yautepec 62730, Morelos, Mexico TI - Sexual selection in Cnephasia jactatana (Lepidoptera : Tortricidae) in relation to age, virginity, and body size AB - Darwin suggested that females should be more selective than males when choosing mates because eggs cost more than sperm, females mate fewer times, and females undergo most of the parental care. We studied sexual selection in a Ne,,v Zealand leafroller, Cnephasia jactatana Walker, in relation to age, virginity, and body size in the laboratory. Results show that males significantly preferred young and virgin to old and mated females for mating, suggesting that the reproductive fitness of females depends strongly on their age and virginity. Female significant preference for virgin males regardless of male age indicates that male virginity and age have asymmetric effects on male reproductive fitness. Higher mating success in males with longer antennae, regardless of male body weight, Suggests that male antennal length rather than body weight plays an important role in sexual selection. The similar antennal-wing length relationships between selected and nonselected males suggest that the absolute length of both antennae and wings are selected characters in male mating Success. Males selected mates according to their own and their partners' body weight but did not have significant preference for females' antennal length and antennal/body length relationships, suggesting that body weight, rather than morphological features, plays a major role in female mating success. In the sexual selection of C. jactatana, males seem to be the choosier sex as a result of (1) females varying more in quality than males and (2) fertile spermatogenesis occurring exclusively during the pupal stage, potentially leading to sperm limitation MH - Mexico|Morelos MH - New Zealand PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0013-8746 UR - ISI:000222642400026 L2 - sexual selection;body weight;virginity;age;antennal length;EPIPHYAS-POSTVITTANA WALKER; MATE CHOICE; REPRODUCTIVE STATUS; MATING-BEHAVIOR; OLDER MALES; MOTHS; FEMALES; CONSEQUENCES; PIERIDAE; SUCCESS SO - Annals of the Entomological Society of America 2004 ;97(4):819-824 11217 UI - 6353 AU - Jimenez-Vega F AU - Yepiz-Plascencia G AU - Soderhall K AU - Vargas-Albores F AD - CIAD, Hermosillo 83000, Sonora, MexicoCIBNOR, La Paz 23000, BCS, MexicoUppsala Univ, Dept Comparat Physiol, S-75236 Uppsala, SwedenVargas-Albores, F, CIAD, POB 1735, Hermosillo 83000, Sonora, Mexico TI - A single WAP domain-containing protein from Litopenaeus vannamei hemocytes AB - A cDNA clone coding for a single WAP domain (SWD) protein was isolated from a hemocyte cDNA library of Litopenaeus vannamei. The full-length cDNA sequence is 0.4 kb long and encodes a 93-amino acid protein. Using this sequence as a probe a similar clone coding for a 92-amino acids protein was found in a cDNA library from Penaeus monodon hemocytes. The mRNA size was confirmed by Northern blot as well as that gene is expressed in hemocytes, but not in hepatopancreas. mRNA levels of the shrimp SWD protein were modified after injection of Vibrio alginolyticus, indicating the probable role of this protein in the immune response. Although amino acid sequence seems to be similar to those of other WAP domain-containing proteins, shrimp SWD protein does not have any other functional domain, similar to a mouse single WAP motif (SWAM) protein reported in mouse; however, the phylogenetic analysis shows that shrimp SWD is more related to other WAP proteins than to mouse SWAM. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Baja California Sur MH - Mexico|Sonora MH - Sweden PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000188613100004 L2 - immunity;shrimp;WAP domain;Penaeus vannamei;Penaeus monodon;SHRIMP PENAEUS-VANNAMEI; ELASTASE-SPECIFIC INHIBITOR; AMINO-ACID-SEQUENCE; WHITE SHRIMP; ANTIMICROBIAL PEPTIDES; CRYSTAL-STRUCTURE; BINDING-PROTEIN; IMMUNE-RESPONSE; HUMAN SKIN; EXPRESSION SO - Biochemical and Biophysical Research Communications 2004 ;314(3):681-687 11218 UI - 3957 AU - Jimenez ES AU - Salamon P AU - Rivero R AU - Rendon C AU - Hoffmann KH AU - Schaller M AU - Andresen B AD - San Diego State Univ, Dept Math, San Diego, CA 92182, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoTech Univ Chemnitz, Chemnitz, GermanyUniv Copenhagen, DK-1168 Copenhagen, DenmarkSalamon, P, San Diego State Univ, Dept Math, San Diego, CA 92182, USA TI - Optimization of a diabatic distillation column with sequential heat exchangers AB - Diabatic distillation is a separation process in which heat is transferred on the trays inside the column as opposed to classical adiabatic columns where heat is only supplied to the reboiler and extracted from the condenser. Such diabatic columns dramatically reduce the exergy needed to perform the separation. One implementation, particularly suitable for retrofitting applications, uses a single heating fluid circulating in series from one tray to the next below the feed tray and a single cooling fluid circulating in series above the feed tray. The optimal design of these sequential heat exchangers, minimizing the overall rate of entropy production in the separation process, is a difficult optimization problem because traditional algorithms for optimization invariably get stuck. However, an algorithm based on physical intuition for adjusting the temperature profile can find the optimum. The resulting column operation is compared to the optimal operation with independent heat transfer to each tray (the completely controlled diabatic column) and to a conventional adiabatic column. In the former comparison, we find how much exergy is lost by circulating a fluid in series rather than using independently adjustable heat exchanges. In the latter, we find the possible savings available by retrofitting. The comparisons show that most of the potential exergy savings can be captured by diabatization using heat exchangers in series. The potential impact of this technology on the chemical and process industry is enormous because distillation is the single largest energy degrading unit operation worldwide MH - Denmark MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000224977600039 L2 - THERMODYNAMIC ANALYSIS; RECTIFICATION; PERFORMANCE SO - Industrial & Engineering Chemistry Research 2004 ;43(23):7566-7571 11219 UI - 3594 AU - Johannesson KH AU - Cortes A AU - Kilroy KC AD - Univ Texas, Dept Geol, Arlington, TX 76019, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoMiami Univ, Dept Geol, Oxford, OH 45056, USAJohannesson, KH, Univ Texas, Dept Geol, Arlington, TX 76019, USA TI - Reconnaissance isotopic and hydrochemical study of Cuatro Cienegas groundwater, Coahuila, Mexico AB - The springs of the Cuatro Cienegas bolson (Four Marshes basin), Coahuila, Mexico, support more than 70 endemic species of biota. The specifics of the groundwater flow regime, however, remain a mystery. Water samples were collected from a series of springs and pools and one canal in the Cuatro Cienegas bolson and analyzed for field parameters (temperature, pH, conductivity, alkalinity) and stable oxygen and hydrogen isotopes in an attempt to begin a systematic study of the hydrogeology of the region. Groundwaters discharging directly along a fault-controlled spring line in Cretaceous carbonate rocks of the Cupido-Aurora aquifer are the most dilute (lowest conductivities) and warmest of those sampled. Cuatro Cienegas waters are characterized by circumneutral pH (6.9-7.7) and reasonably low alkalinity (160-215 mg/kg as HCO3. The delta O-18 values of Cuatro Cienegas waters range from - 8.2 to +/- 5.7%c, with a mean of - 6.5 +/- 0.82%, whereas deltaD ranges from - 52 to - 43%o, with a mean of - 46.6 +/- 3.2%. The majority of the water samples plot subparallel and beneath the local meteoric water line; those samples collected farthest from the spring line exhibit the most enriched delta O-18 and deltaD values. The stable isotope data indicate that isotopic enrichment of groundwaters by evaporation following discharge and subsequent surface flow is an important process within the Cuatro Cienegas bolson. The isotope data also suggest that a fraction of Cuatro Cienegas groundwater originates with local recharge in mountains surrounding the bolson. Those springs that issue from the western base of the Sierra de San Marcos mountain range are recharged in part in these mountains, whereas groundwaters discharging from Laguna Anteojo in the northern part of the bolson are more likely recharged in the higher San de la Madera mountain range. An estimate of the water balance suggests that interbasin flow also may contribute to the considerable groundwater discharge. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000225734800005 L2 - groundwater;interbasin flow;semiarid regions;Cuatro Cienegas;Mexico;AQUIFER; BASIN; USA SO - Journal of South American Earth Sciences 2004 ;17(2):171-180 11220 UI - 5562 AU - Johansson SGO AU - Bieber T AU - Dahl R AU - Friedmann PS AU - Lanier BQ AU - Lockey RF AU - Motala C AU - Martell JAO AU - Platts-Mills TAE AU - Ring J AU - Thien F AU - Van Cauwenberge P AU - Williams HC AD - Karolinska Univ Hosp, Dept Clin Immunol, Dept Med, S-17176 Stockholm, SwedenUniv Bonn, Dept Dermatol, D-5300 Bonn, GermanyAarhus Univ Hosp, Dept Resp Dis & Allergol, DK-8000 Aarhus, DenmarkSouthampton Gen Hosp, Dermatopharmacol Unit, Southampton SO9 4XY, Hants, EnglandUniv N Texas, Hlth Sci Ctr, Dept Pediat, Ft Worth, TX 76107, USAAmer Coll Allergy Asthma & Immunol, Ft Worth, TX, USAUniv S Florida, Coll Med, Div Allergy & Immunol, Tampa, FL, USAJames A Haley Vet Hosp, Tampa, FL 33612, USARed Cross Childrens Hosp, Rondebosch, South AfricaColl Pediat Hidalgo, Mexico City, DF, MexicoUniv Virginia, Med Ctr, Asthma & Allerg Dis Ctr, Charlottesville, VA, USATech Univ Munich, Dept Dermatol & Allergy Biederstein, Zentrum Allergie & Umwelt GSF TUM, D-8000 Munich, GermanyMonash Univ, Dept Med, Melbourne, Vic 3004, AustraliaState Univ Ghent Hosp, Dept Otorhinolaryngol, Ghent, BelgiumQueens Med Ctr, Ctr Evidence Based Dermatol, Nottingham NG7 2UH, EnglandJohansson, SGO, Karolinska Univ Hosp, Dept Clin Immunol, Dept Med, L2 04, S-17176 Stockholm, Sweden TI - Revised nomenclature for allergy for global use: Report of the Nomenclature Review Committee of the World Allergy Organization, October 2003 AB - The nomenclature proposed in the October 2003 report of the Nomenclature Review Committee of the World Allergy Organization is an update of the European Academy of Allergology and Clinical Immunology Revised Nomenclature for Allergy Position Statement published in 2001. The nomenclature can be used independently of target organ or patient age group and is based on the mechanisms that initiate and mediate allergic reactions. It is assumed that as knowledge about basic causes and mechanisms improves, the nomenclature will need further review MH - Australia MH - Belgium MH - Denmark MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - South Africa MH - Sweden MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 198 U4 - Allergy;Immunology U5 - J;Article AV - English IS - 0091-6749 UR - ISI:000221269000003 L2 - nomenclature;allergy;hypersensitivity;IgE;atopy;asthma;dermatitis;eczema;rhinitis;anaphylaxis;ATOPIC-DERMATITIS; ANAPHYLACTOID REACTIONS; ADVERSE-REACTIONS; NATURAL-HISTORY; LATEX ALLERGY; CLASSIFICATION; DISORDERS; CHILDREN; ASTHMA; FOOD SO - Journal of Allergy and Clinical Immunology 2004 ;113(5):832-836 11221 UI - 4876 AU - Johnson P AU - Elsner R AU - Zenteno-Savin T AD - Ctr Invest Biol Noroeste, Programa Planeac Ambiental & Conservat, Mexico City 23090, DF, MexicoUniv Alaska, Inst Marine Sci, Fairbanks, AK 99775, USAOhio Univ, Dept Biomed Sci, Athens, OH 45701, USAZenteno-Savin, T, Ctr Invest Biol Noroeste, Programa Planeac Ambiental & Conservat, Mar Bermejo 195,Playa Palo Santa Rita,La Paz BCS, Mexico City 23090, DF, Mexico TI - Hypoxia-inducible factor in ringed seal (Phoca hispida) tissues AB - Tissue hypoxia and ischemia-reperfusion pose a dangerous situation for oxidative stress. However, diving mammals and birds show pronounced resistance to oxidative injury under such conditions, which are a consequence of selective vasoconstriction during a dive. As the function of Hypoxia-Inducible Factor-1alpha (HIF-1alpha) in protection against and adaptation to hypoxia has been recognized in terrestrial animals, we have investigated the genomics and expression of this protein in ringed seal (Phoca hispida) in order to determine if it may play a protective role in this diving mammal. PCR studies using primers based on sequences from mouse HIF-1alpha exons 3,4, 5, 6, 9, 10, 11, 12 and 15 showed that DNA from seal lung generated PCR products similar to those from mouse DNA. These studies have established that a putative HIF-1alpha gene exists in the seal genome that appears to have a similar but not identical sequence to the mouse gene. Seal lung and skeletal muscle tissues showed the highest relative levels of HIF-1alpha protein expression, with heart muscle showing significantly lower levels, and levels of HIF-1beta protein expression paralleled this situation. Analysis of oxidized cellular protein levels indicated that seal lung and heart muscle had the lowest levels of oxidized proteins. Thus, as seal lung tissue had the highest level of HIF-1alpha protein expression and the second lowest level of protein oxidation, this suggests that HIF-1alpha expression may have an important protective effect in this tissue in diving mammals. Our results support the hypothesis that HIF-1alpha expression is dependent on both tissue-specific energy requirements and adequate metabolic supply-to-demand ratio. Combined, the evidence available suggests that diving mammals have an overall anticipatory response to avoid the ill effects of dive-associated ischemia-reperfusion which may involve the HIF-1 system MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 1071-5762 UR - ISI:000222899900009 L2 - hypoxia-inducible factor;diving mammal;hypoxia;ischemia-reperfusion;protein oxidation;OXIDATIVE STRESS; FACTOR 1-ALPHA; HUMAN TUMORS/; BLOOD-FLOW; FACTOR-I; PROTEIN; HIF-1-ALPHA; GENE; FACTOR-1-ALPHA; EXPRESSION SO - Free Radical Research 2004 ;38(8):847-854 11222 UI - 5525 AU - Joshi AK AU - Chand R AU - Kumar S AU - Singh RP AD - Banaras Hindu Univ, Dept Genet & Plant Breeding, Varanasi 221005, Uttar Pradesh, IndiaBanaras Hindu Univ, Dept Mycol & Plant Pathol, Inst Agr, Varanasi 221005, Uttar Pradesh, IndiaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoJoshi, AK, Banaras Hindu Univ, Dept Genet & Plant Breeding, Varanasi 221005, Uttar Pradesh, India TI - Leaf tip necrosis: A phenotypic marker associated with resistance to spot blotch disease in wheat AB - Spot blotch, caused by Bipolaris sorokiniana (Sacc.) Shoem. syn. Drechslera sorokiniana (Sacc.) Subrm and Jain (syn. Helminthosporium sativum, teleomorph Cochliobolus sativus), is an important disease of wheat (Triticum aestivum L.) in warmer and humid regions of the world. To date, no morphological marker is known to be associated with resistance to this disease. The purpose of this study was to find out the association of leaf tip necrosis (Ltn) with resistance to spot blotch disease. A total of 1407 spring wheat genotypes that originated from the Indian and CIMMYT wheat breeding programs were evaluated for Ltn and resistance to spot blotch for three seasons (1994-1995, 1995-1996, and 1996-1997) under field conditions. Disease severity was recorded at six growth stages under artificially created epidemics. About 75% of the genotypes showing Ltn (Ltn+) were resistant or moderately resistant, whereas 82% not showing it (Ltn-) were moderately susceptible or susceptible. Mean spot blotch rating of the Ltn+ genotypes was significantly lower than the Ltn- genotypes at all growth stages and the genotype X environment interaction was nonsignificant. To confirm the association of Ltn with resistance, individual F-2-derived F-3, F-4, F-5, and F-6 progenies from the cross of the 'HUW234' near-isogenic pair for Ltn were evaluated for spot blotch severity. In each generation, the Ltn+ homozygous progenies had significantly less disease than those homozygous Ltn-. These results confirm that leaf tip necrosis is associated with moderate resistance to spot blotch and can be used as a morphological marker to facilitate selection for resistance MH - India MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 17 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000221390000014 L2 - ADULT-PLANT RESISTANCE; RUST RESISTANCE; GENE LR34; TRITICUM-AESTIVUM; GROWTH-STAGES; SPRING WHEAT; STRIPE RUST; BREAD WHEAT; YR18 SO - Crop Science 2004 ;44(3):792-796 11223 UI - 6368 AU - Juarez-Arellano EA AU - Rosales I AU - Oliver A AU - Ruvalcaba JL AU - Carbonio RE AU - Bucio L AU - Orozco E AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Nacl Cordoba, Fac Ciencias Quim, Dept Quim Fis, INFIQC, RA-5000 Cordoba, ArgentinaJuarez-Arellano, EA, Univ Nacl Autonoma Mexico, Inst Fis, AP 20-364, Mexico City 01000, DF, Mexico TI - In1.06Ho0.94Ge2O7: a thortveitite-type compound AB - A new indium holmium digermanate, In1.06Ho0.94Ge2O7, with a thortveitite-type structure, has been prepared as a polycrystalline powder material by high-temperature solid-state reaction. This new compound crystallizes in the monoclinic system (space group C2/c, No. 15). The structure was characterized by Rietveld refinement of powder laboratory X-ray diffraction data. The In3+ and Ho3+ cations occupy the same octahedral site, forming a hexagonal arrangement on the ab plane. In their turn, the hexagonal arrangements of (In/Ho)O-6 octahedral layers are held together by sheets of isolated diortho groups comprised of double tetrahedra sharing a common vertex. In this compound, the Ge2O7 diortho groups lose the ideal Dad point symmetry and also the C-2h point symmetry present in the thortveitite diortho groups. The Ge-O-Ge angle bridging the diortho groups is 160.2 (3)degrees, compared with 180.0degrees for Si-O-Si in thortveitite (Sc2Si2O7). The characteristic mirror plane in the thortveitite space group (C2/m, No. 12) is not present in this new thortveitite-type compound and the diortho groups lose the C-2h point symmetry, reducing to C-2 MH - Argentina MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 1 U4 - Crystallography U5 - J;Article AV - English IS - 0108-2701 UR - ISI:000188555300002 L2 - CRYSTAL-STRUCTURE; SCINTILLATORS; REFINEMENT SO - Acta Crystallographica Section C-Crystal Structure Communications 2004 ;60():I14-I16 11224 UI - 4496 AU - Juarez-Perez CA AU - guilar-Madrid G AU - Smith DR AU - Lacasana-Navarro M AU - Tellez-Rojo MM AU - Piacitteli G AU - Hu H AU - Hernandez-Avila M AD - Inst Nacl Salud Publ, Ctr Invest Salud Pobl, Cuernavaca 62508, Morelos, MexicoInst Mexicano Seguro, Coodinac Salud & Trabajo, Mexico City, DF, MexicoUniv Calif Santa Cruz, Dept Environm Toxicol, Santa Cruz, CA 95064, USANIOSH, Ctr Dis Control, Cincinnati, OH 45226, USABrigham & Womens Hosp, Channing Lab, Dept Med, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Occupat Hlth Program, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA 02115, USAHernandez-Avila, M, Inst Nacl Salud Publ, Ctr Invest Salud Pobl, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Predictors of plasma llead among lithographic print shop workers in Mexico City AB - Background Plasma lead is considered a biological marker that reflects the fraction of lead in blood that is toxicologically available. We examined the relationship between plasma lead and other biomarkers of lead exposure in 69 lithographic print shop workers. Methods Lead was measured in plasma and whole blood (by inductively coupled plasma-magnetic sector mass spectrometry), in bone (by Cd-109 X-ray fluorescence), and in hand wipes and occupational air samples. Personal hygiene habits at work were surveyed. Results Mean age was 47 years and 86% (n=59) were men. Mean lead levels were 0.3 mug/L in plasma, 11.9 mug/dL in blood, 46.7 mug/g in patella, and 27.6 mug/g in tibia. Taken together, two multivariate linear models explained 57% of variability in plasma lead levels. Predictors for the first model were lead in patella (beta = 0.006), blood (beta = 0.008), and hygiene index (beta = -0.11). Predictors for the second model were lead in tibia (beta = 0.008), blood (beta = 0.008), and hygiene index (beta = -0.13). Conclusions This study demonstrates that accumulated bone stores and hygiene habits are both significant independent predictors of plasma lead levels in active workers at this print shop. (C) 2004 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0271-3586 UR - ISI:000223692800005 L2 - plasma lead;bone lead;air lead;occupational exposure;Mexico;ACID-BATTERY WORKERS; LEAD BLOOD RELATION; X-RAY-FLUORESCENCE; BONE-LEAD; WHOLE-BLOOD; IN-VIVO; HYPERTENSION; PRESSURE; EXPOSURE; SERUM SO - American Journal of Industrial Medicine 2004 ;46(3):245-252 11225 UI - 3512 AU - Juarez LH AU - Kantz H AU - Martinez O AU - Ramos E AU - Rechtman R AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoMax Planck Inst Phys Komplexer Syst, D-01187 Dresden, GermanyUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoJuarez, LH, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Complex dynamics in simple systems with periodic parameter oscillations AB - We study systems with periodically oscillating parameters that can give way to complex periodic or nonperiodic orbits. Performing the long time limit, we can define ergodic averages such as Lyapunov exponents, where a negative maximal Lyapunov exponent corresponds to a stable periodic orbit. By this, extremely complicated periodic orbits composed of contracting and expanding phases appear in a natural way. Employing the technique of epsilon-uncertain points, we find that values of the control parameters supporting such periodic motion are densely embedded in a set of values for which the motion is chaotic. When a tiny amount of noise is coupled to the system, dynamics with positive and with negative nontrivial Lyapunov exponents are indistinguishable. We discuss two physical systems, an oscillatory flow inside a duct and a dripping faucet with variable water supply, where such a mechanism seems to be responsible for a complicated alternation of laminar and turbulent phases MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000225970700050 L2 - DRIPPING FAUCET; TRANSITION; TURBULENCE; PERTURBATIONS; SIMULATION; CHAOS; FLOW; MAP SO - Physical Review e 2004 ;70(5): 11226 UI - 3780 AU - Juarez RAS AU - Montoya ER AU - Nevarez CG AU - Cerrillo SMA AU - Mould FL AD - Univ Juarez Estado Durango, Fac Med Vet & Zootecnia, Div Estud Posgrado, Durango, Dgo, MexicoUniv Reading, Dept Agr, Reading RG6 6AR, Berks, EnglandJuarez, RAS, Univ Juarez Estado Durango, Fac Med Vet & Zootecnia, Div Estud Posgrado, Carretera Durango Mezquital Km 11-5, Durango, Dgo, Mexico TI - In situ degradability of dry matter and neutral-detergent fibre of thorn scrubland forage consumed by goats in the semi-arid region of north Mexico AB - Three goats provided with oesophageal and ruminal cannulae were used to determine variations in dry matter (DM) and neutral-detergent fibre (NDF) degradability of the forage consumed when grazing thorn scrubland in the semi-arid region of north Mexico, during two consecutive dry and wet periods. Ingesta samples were incubated intraruminally, the data were fitted to the exponential equation P = a + b (1-e(-ct)) and statistically analysed using a randomized-block design. Organic matter and crude protein (CP) contents were higher (P < 0.05) in the wet seasons. Values of NDF were similar in dry and wet season of both years whereas higher numerical values of acid-detergent fibre (ADF), lignin and cellulose were registered in the dry seasons. DM and NDF degradabilities after 24 and 48 h of ruminal incubation were higher (P < 0.05) in the wet seasons. Higher values (P < 0.05) in DM and NDF bag losses at zero time (A fraction) were registered in the two wet seasons. The insoluble but fermentable DM and NDF (B fractions) were higher (P < 0.05) in the 1999 wet season and variable in the rest of the studied period. Numerically higher values of DM and NDF c fraction were found in wet periods, whereas DM and NDF potential degradabilities were higher (P < 0.05) in the wet season in 1999 and similar across seasons in 2000. Lowest (P < 0.05) contents of CP in grazed forage, DM and NDF degradabilities after 48 h of ruminal incubation, and A, and B, and c fractions were observed in the dry seasons. Thus, these results may be related to both the lower feeding value of forage consumed by the animals and lower performance of livestock during this period. Then, the DM and NDF degradability after 48 h, together with the insoluble but fermentable matter and the c fraction permit the nutritive value of the forage consumed by grazing goats to be accurately described MH - United Kingdom MH - Mexico|Durango PB - PENICUIK: BRITISH SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 1357-7298 UR - ISI:000225494300016 L2 - goats;grazing;Mexico;rumen digestion;semi-desert scrub;DEGRADATION CHARACTERISTICS; APPARENT DIGESTIBILITY; GROWTH-RATE; RUMEN; SHEEP; PREDICTION; DISAPPEARANCE; COMPONENTS; KINETICS; PASSAGE SO - Animal Science 2004 ;79():505-511 11227 UI - 4859 AU - Jung C AU - Mejia-Monasterio C AU - Taylor HS AD - Univ So Calif, Dept Chem, Los Angeles, CA 90089, USAUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoTaylor, HS, Univ So Calif, Dept Chem, Los Angeles, CA 90089, USA TI - Analysis of an algebraic model for the chromophore vibrations of CF3CHFI AB - We extract the dynamics implicit in an algebraic fitted model Hamiltonian for the hydrogen chromophore's vibrational motion in the molecule CF3CHFI. The original model has four degrees of freedom, a conserved polyad allows the reduction to three degrees of freedom. For most quantum states we can identify the underlying motion that when quantized gives the said state. Most of the classifications, identifications and assignments are done by visual inspection of the already available wave function serniclassically transformed from the number representation to a representation on the reduced dimension toroidal configuration space corresponding to the classical action and angle variables. The concentration of the wave function density to lower dimensional subsets centered on idealized simple lower dimensional organizing structures and the behavior of the phase along such organizing centers already reveals the atomic motion. Extremely little computational work is needed MH - Mexico|Morelos MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000222826200004 L2 - BENDING SPECTRUM; CLASSICAL CHAOS; DYNAMICS; ACETYLENE; CHBRCLF; CM(-1); STATE; REDISTRIBUTION; ASSIGNMENT; ENERGY SO - Physical Chemistry Chemical Physics 2004 ;6(12):3069-3076 11228 UI - 5502 AU - Jung C AU - Mejia-Monasterio C AU - Merlo O AU - Seligman TH AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoUniv Basel, Inst Phys, Basel, SwitzerlandCtr Int Ciencias, Cuernavaca, Morelos, MexicoJung, C, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, Mexico TI - Self-pulsing effect in chaotic scattering AB - We study the quantum and classical scattering of Hamiltonian systems whose chaotic saddle is described by binary or ternary horseshoes. We are interested in situations for which a stable island, associated with the inner fundamental periodic orbit of the system exists and is large, but chaos around this island is well developed. Such situations are quite common as they correspond typically to the near-integrable domain in the transition from integrable to chaotic scattering. Both classical and quantum dynamics are analysed and in both cases, the most surprising effect is a periodic response to an incoming wave packet. The period of this self-pulsing effect or scattering echoes coincides with the mean period, by which the scattering trajectories rotate around the stable orbit. This period of rotation is directly related to the development stage of the underlying horseshoe. Therefore the predicted echoes will provide experimental access to topological information. We numerically test these results in kicked one-dimensional models and in open billiards MH - Mexico|Morelos MH - Switzerland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1367-2630 UR - ISI:000221406500001 L2 - HAMILTONIAN-SYSTEMS; QUANTUM SO - New Journal of Physics 2004 ;6(): 11229 UI - 6147 AU - Jung C AU - Mejia-Monasterio C AU - Taylor HS AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv So Calif, Dept Chem, Los Angeles, CA 90089, USAJung, C, UNAM, Ctr Ciencias Fis, Av Univ, Cuernavaca 62251, Morelos, Mexico TI - Spectroscopic interpretation: The high vibrations of CDBrClF AB - We extract the dynamics implicit in an algebraic fitted model Hamiltonian for the deuterium chromophore's vibrational motion in the molecule CDBrClF. The original model has four degrees of freedom, three positions and one representing interbond couplings. A conserved polyad allows in a semiclassical approach the reduction to three degrees of freedom. For most quantum states we can identify the underlying motion that when quantized gives the said state. Most of the classifications, identifications, and assignments are done by visual inspection of the already available wave function semiclassically transformed from the number representation to a representation on the reduced dimension toroidal configuration space corresponding to the classical action and angle variables. The concentration of the wave function density to lower dimensional subsets centered on idealized simple lower dimensional organizing structures and the behavior of the phase along such organizing centers already reveals the atomic motion. Extremely little computational work is needed. (C) 2004 American Institute of Physics MH - Mexico|Morelos MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000189209200016 L2 - BENDING SPECTRUM; CLASSICAL CHAOS; DYNAMICS; ACETYLENE; CHBRCLF; CM(-1); STATE; REDISTRIBUTION; ASSIGNMENT; ENERGY SO - Journal of Chemical Physics 2004 ;120(9):4194-4206 11230 UI - 4550 AU - Jura M AU - Chen CH AU - Furlan E AU - Green J AU - Sargent B AU - Forrest WJ AU - Watson DM AU - Barry DJ AU - Hall P AU - Herter TL AU - Houck JR AU - Sloan GC AU - Uchida K AU - D'Alessio P AU - Brandl BR AU - Keller LD AU - Kemper F AU - Morris P AU - Najita J AU - Calvet N AU - Hartmann L AU - Myers PC AD - Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USACornell Univ, Dept Astron, Ithaca, NY 14853, USAUniv Rochester, Dept Phys & Astron, Rochester, NY 14627, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoSterrewacht Leiden, NL-2300 RA Leiden, NetherlandsIthaca Coll, Dept Phys, Ithaca, NY 14850, USACALTECH, Spitzer Sci Ctr, Pasadena, CA 91125, USANatl Opt Astron Observ, Tucson, AZ 85726, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAJura, M, Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA TI - Mid-infrared spectra of dust debris around main-sequence stars AB - We report spectra obtained with the Spitzer Space Telescope in the lambda=14-35 mum range of 19 nearby main-sequence stars with infrared excesses. The six stars with strong dust emission show no recognizable spectral features, suggesting that the bulk of the emitting particles have diameters larger than 10 mum. If the observed dust results from collisional grinding of larger solids, we infer minimum masses of the parent body population between 0.004 and 0.06 M-circle plus. We estimate grain production rates of similar to10(10) g s(-1) around lambda Boo and HR 1570; selective accretion of this matter may help explain their peculiar surface abundances. There appear to be inner truncations in the dust clouds at 48, 11, 52, and 54 AU around HR 333, HR 506, HR 1082, and HR 3927, respectively MH - USA MH - Mexico|Michoacan MH - Netherlands PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000223634300083 L2 - circumstellar matter;infrared : stars;LAMBDA-BOOTIS STARS; VEGA PHENOMENON; ASTEROID BELT; DISK; DISTRIBUTIONS; SIGNPOSTS; MIGRATION; CLUMPS; MODEL SO - Astrophysical Journal Supplement Series 2004 ;154(1):453-457 11231 UI - 5204 AU - Kahru M AU - Marinone SG AU - Lluch-Cota SE AU - Pares-Sierra A AU - Mitchell BG AD - Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USACICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoCtr Invest Biol Noroeste SC, La Paz 23000, BCS, MexicoKahru, M, Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA TI - Ocean-color variability in the Gulf of California: scales from days to ENSO AB - Time series of surface chlorophyll a concentration (C-sat) and phytoplankton net primary production (NPP) in the Gulf of California were derived using satellite data from OCTS, SeaWiFS, MODIS, AVHRR and the VGPM primary productivity model. The 6-year (1997-2003) time series showed variability at a multitude of scales. The annual cycle was the dominant mode in Gat variability in the entire gulf, except just south of the midriff islands where the semiannual cycle dominated. The semiannual cycle has C-sat maxima during the spring and fall transition periods when the general circulation is switching between cyclonic in the summer and anticyclonic in the winter and is less developed, therefore allowing a more efficient tidal mixing. The spring and fall maxima often consisted of multiple peaks of about 10 days. A significant peak at about 1 month was often present in the short-term C-sat variability, especially in areas near the midriff islands, suggesting the influence of tidal mixing. The interannual variability was dominated by the 1997-98 El Nino and the following La Nina. During the El Nino period NPP decreased by 30-40% in the southern part of the gulf (by approximately 1 Tg C month(-1)), but the changes in the central and northern parts were less evident. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California MH - Mexico|Baja California Sur PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000222170100009 L2 - SEA-SURFACE TEMPERATURE; EL-NINO; SCANNER IMAGERY; CHLOROPHYLL; CIRCULATION; PACIFIC SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(1-3):139-146 11232 UI - 4503 AU - Kakazey M AU - Vlasova M AU - Dominguez-Patino M AU - Dominguez-Patino G AU - Sreckovic T AU - Nikolic N AD - Univ Autonoma Estado Morelos, CIICAp, FCQI, Cuernavaca 62210, Morelos, MexicoSASA, Joint Lab Adv Mat, YU-11000 Belgrade, YugoslaviaKakazey, M, Univ Autonoma Estado Morelos, CIICAp, FCQI, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Electron paramagnetic resonance in the research of defect formation and thermal processes during grinding of ZnO powders AB - This work shows some possibilities for using electron paramagnetic resonance in an experimental study of the role of mechanothermal effects in the formation of defect structures in dispersed systems during prolonged mechanical treatment of ZnO powders. The use of EPR for this purpose is based on the known fact that initiation of a number of paramagnetic centers occurs during mechanical treatment of some materials. Such centers can serve as EPR-sondes of different thermal processes appearing during mechanical treatment of systems containing ZnO MH - Mexico|Morelos MH - Yugoslavia PB - BELGRADE: INT INST SCIENCE SINTERING (I I S S) RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0350-820X UR - ISI:000223705000001 L2 - zinc oxide;mechanical treatment;point defects;annealing;electron paramagnetic resonance;ZINC-OXIDE; ESR SO - Science of Sintering 2004 ;36(2):65-72 11233 UI - 4017 AU - Kalacska M AU - Sanchez-Azofeifa GA AU - Calvo-Alvarado JC AU - Quesada M AU - Rivard B AU - Janzen DH AD - Univ Alberta, Earth & Atmospher Sci Dept, Edmonton, AB T6G 2E3, CanadaITCR, Escuela Ingn Forestal, Programa Manejo & Conservac Recursos Nat, Cartago, Costa RicaUniv Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoUniv Penn, Dept Biol, Philadelphia, PA 19104, USASanchez-Azofeifa, GA, Univ Alberta, Earth & Atmospher Sci Dept, Edmonton, AB T6G 2E3, Canada TI - Species composition, similarity and diversity in three successional stages of a seasonally dry tropical forest AB - The objectives of this study were to describe the floristic composition, species diversity, similarity and richness among three stages of forest regeneration, and to investigate the influence of the previous land use on species composition in a seasonally dry tropical forest in northwestern Costa Rica. The species diversity and richness of woody stems with diameter greater or equal to 5 cm in 260.1 ha plots was found to be the greatest in the intermediate stage followed by the late and early stages. The structural changes of this chronosequence of successional stages were quantified with a modification of the Holdridge complexity index. Using satellite imagery for site selection and historical ground truth analysis the influence of past land use and the frequency of anthropogenic disturbances on species composition was illustrated. (C) 2004, Elsevier B.V. All rights reserved MH - Canada MH - Costa Rica MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Forestry U5 - J;Article AV - English IS - 0378-1127 UR - ISI:000224682400018 L2 - tropical dry forest;floristic composition;species richness;similarity;holdridge complexity index;incidence based coverage estimator;forest structure;successional stages;Costa Rica;Area de Conservacion Guanacaste;FLORISTIC DIVERSITY; ABANDONED PASTURES; DECIDUOUS FOREST; EASTERN AMAZONIA; LOWLAND BOLIVIA; PUERTO-RICO; COSTA-RICA; LEAF-AREA; PATTERNS; MEXICO SO - Forest Ecology and Management 2004 ;200(1-3):227-247 11234 UI - 3887 AU - Kalantari M AU - Calleja-Macias IE AU - Tewari D AU - Hagmar B AU - Lie K AU - Barrera-Saldana HA AU - Wiley DJ AU - Bernard HU AD - Univ Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92697, USAUniv Calif Irvine, Dept Obstet & Gynecol, Orange, CA 92668, USAUniv Calif Los Angeles, Sch Nursing, Los Angeles, CA, USAUniv Autonoma Nuevo Leon, Fac Med, Dept Bioquim, Monterrey, MexicoNatl Hosp, Dept Pathol, Oslo, NorwayNorwegian Radium Hosp, Dept Pathol, Oslo, NorwayBernard, HU, Univ Calif Irvine, Dept Mol Biol & Biochem, 114 Sprague Hall, Irvine, CA 92697 USA TI - Conserved methylation patterns of human papillomavirus type 16 DNA in asymptomatic infection and cervical neoplasia AB - DNA methylation contributes to the chromatin conformation that represses transcription of human papillomavirus type16 (HPV-16), which is prevalent in the etiology of cervical carcinoma. In an effort to clarify the role of this phenomenon in the regulation and carcinogenicity of HPV-16, 115 clinical samples were studied to establish the methylation patterns of the 19 CpG dinucleotides within the long control region and part of the L1 gene by bisulfite modification, PCR amplification, DNA cloning, and sequencing. We observed major heterogeneities between clones from different samples as well as between clones from individual samples. The methylation frequency of CpGs was measured at 14.5%. In addition, 0.21 and 0.23%, respectively, of the CpA and CpT sites, indicators of de novo methylation, were methylated. Methylation frequencies exceeded 30% in the CpGs overlapping with the L1 gene and were about 10% for most other positions. A CpG site located in the linker between two nucleosomes positioned over the enhancer and promoter of HPV-16 had minimal methylation. This region forms part of the HPV replication origin and is close to binding sites of master-regulators of transcription during epithelial differentiation. Methylation of most sites was highest in carcinomas, possibly due to tandem repetition and chromosomal integration of HPV-16 DNA. Methylation was lowest in dysplasia, likely reflecting the transcriptional activity in these infections. Our data document the efficient targeting of HPV genomes by the epithelial methylation machinery, possibly as a cellular defense mechanism, and suggest involvement of methylation in HPV oncogene expression and the early-late switch MH - USA MH - Mexico|Nuevo Leon MH - Norway PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 22 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000225087500004 L2 - DE-NOVO METHYLATION; VIRAL GENE-EXPRESSION; EMBRYONIC STEM-CELLS; LONG CONTROL REGION; NON-CPG METHYLATION; VIRUS DNA; MAINTENANCE METHYLATION; CYTOSINE METHYLATION; PHYSICAL STATE; E6 PROMOTER SO - Journal of Virology 2004 ;78(23):12762-12772 11235 UI - 5198 AU - Kamar M AU - varez-Manilla G AU - Abney T AU - Azadi P AU - Kolli VSK AU - Orlando R AU - Pierce M AD - Univ Georgia, Complex Carbohydrate Res Ctr, Athens, GA 30602, USACtr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoPierce, M, Univ Georgia, Complex Carbohydrate Res Ctr, 315 Riverbend Rd, Athens, GA 30602 USA TI - Analysis of the site-specific N-glycosylation of beta 1,6N-acetylglucosaminyltransferase V AB - N-acetylglucosaminyltransferase V (GnT-V) catalyzes the addition of a beta1,6-linked GlcNAc to the alpha1,6 mannose of the trimannosyl core to form tri- and tetraantennary N-glycans and contains six putative N-linked sites. We used mass spectrometry techniques combined with exoglycosidase digestions of recombinant human GnT-V expressed in CHO cells, to identify its N-glycan structures and their sites of expression. Release of N-glycans by PNGase F treatment, followed by analysis of the permethylated glycans using MALDI-TOF MS, indicated a range of complex glycans from bi- to tetraantennary species. Mapping of the glycosylation sites was performed by enriching for trypsin-digested glycopeptides, followed by analysis of each fraction with Q-TOF MS. Predicted tryptic glycopeptides were identified by comparisons of theoretical masses of peptides with various glycan masses to the masses of the glycopeptides determined experimentally. Of the three putative glycosylation sites in the catalytic region, peptides containing sites Asn 334, 433, and 447 were identified as being N-glycosylated. Asn 334 is glycosylated with only a biantennary structure with one or two terminating sialic acids. Sites Asn 433 and 447 both contain structures that range from biantennary with two sialic acids to tetraantennary terminating with four sialic acids. The predominant glycan species found on both of these sites is a triantennary with three sialic acids. The appearance of only biantennary glycans at site Asn 433, coupled with the appearance of more highly branched structures at Asn 334 and 447, demonstrates that biantennary acceptors present at different sites on the same protein during biosynthesis can differ in their accessibility for branching by GnT-V MH - USA MH - Mexico|Sonora PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0959-6658 UR - ISI:000222034500002 L2 - glycoforms;LC-MS;MALDI MS;N-acetylglucosaminyltransferase V;N-glycosylation;HAMSTER OVARY CELLS; ACETYLGLUCOSAMINYLTRANSFERASE-V; TRANSCRIPTIONAL REGULATION; ENZYME-ACTIVITY; CARBOHYDRATE CHAINS; CYSTEINE RESIDUES; RECOMBINANT; EXPRESSION; OLIGOSACCHARIDES; CARCINOMA SO - Glycobiology 2004 ;14(7):583-592 11236 UI - 4335 AU - Kampichler C AU - Platen R AD - Free Univ Berlin, Soil Zool & Ecol Lab, Inst Biol, D-12165 Berlin, GermanyKampichler, C, Univ Juarez Autonoma Tabasco, Div Acad Ciencias Biol, Carretera Villahermosa Cardenas Km 0-5,S-N,Entron, Villahermosa 86150, Tabasco, Mexico TI - Ground beetle occurrence and moor degradation: modelling a bioindication system by automated decision-tree induction and fuzzy logic AB - Mostly due to anthropogenic influences, moors in Central Europe are undergoing rapid succession. We tried to indicate five degradation stages of a peculiar type of moors, so-called kettle-hole moors, which are located in the region of terminal moraines left by the Pleistocene glaciation up until 10,000 years B.P. Using a database of more than 12,000 individuals of carabid beetles belonging to more than 100 species sampled in 25 sites of various stages of degradation, we tried to construct a bioindication system by the use of machine learning techniques. Model-tree induction yielded a classifier consisting of three decision-trees which was moderately successful in classifying moors into the correct degradation stages by using information on only nine species, thus reducing the biotic information to a necessary minimum and creating an extremely parsimonious model. A translation of the decision-trees into fuzzy rule-based models increased bioindicatory efficiency: only 1 of the 10 unseen cases used for validation deviated more than one class from the correct degradation stage. At the moment, this model reflects a static picture of kettle-hole moor degradation, confirming what can be said after macroscopic examination. Future studies must show whether the more subtle dynamic aspects of moor degradation can also be indicated by carabid beetle occurrence. (C) 2004 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Tabasco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation;Environmental Sciences U5 - J;Article AV - English IS - 1470-160X UR - ISI:000224029600002 L2 - wetland ecology;moors;carabid beetles;succession;bioindication;machine learning;rule-induction;fuzzy logic;POPULATION-DYNAMICS SO - Ecological Indicators 2004 ;4(2):99-109 11237 UI - 5711 AU - Kampichler C AU - Rolschewski J AU - Donnelly DP AU - Boddy L AD - Free Univ Berlin, Soil Zool & Ecol Lab, D-12165 Berlin, GermanyUniv Wales Coll Cardiff, Sch Biosci, Cardiff CF10 3TL, S Glam, WalesKampichler, C, Univ Juarez Autonoma Tabasco, Acad Div Biol Sci, Carretera Villahermosa Cardenas Km 05 S-N, Tabasco 86150, Mexico TI - Collembolan grazing affects the growth strategy of the cord-forming fungus Hypholoma fasciculare AB - Mycelia of cord-forming fungi show remarkable patterns of reallocation of biomass and nutrients indicating an important role of these, often extensive, organisms in the spatial translocation of energy and nutrients in forest soils. Despite the rich tradition of interaction studies between soil microarthropods and fungi, the spatial implications of these interactions, due to the potential growth responses of the fungi and to the translocation of energy and nutrients within the mycelial network, have been largely ignored. In this paper we analyse fungal growth responses in two-dimensional model systems composed of compressed soil, the cord-forming fungus Hypholoma fasciculare, and three fungivorous Collembolan species. We hypothesised that (i) the highly co-ordinated nature of cord-forming fungi would lead to growth responses following collembolan grazing, and that, (ii) such changes are dependent on grazing intensity, and (iii) changes are dependent on the species grazing. Mycelial extent and hyphal cover decreased with increasing grazing density; at highest grazing density also the fractal dimension of the mycelial border decreased, indicating a less branched foraging front due to the regression of fine hyphae and the development of mycelial cords. Effects differed greatly between collembolan species although they exerted comparable grazing pressure (the smaller species were added in larger numbers according to their allometric size-metabolic rate relationships): while grazing by Folsomia candida resulted in less mycelial extension and hyphal cover, these variables were not affected when Proisotoma minuta and Hypogastrura cf. tullbergi grazed. The effects of a species mix suggested an additive effect of the component species. This shows that fungal mycelia may suffer from damage caused by few but large collembolans, affecting extension as well as coverage of the mycelium, but that fungi may compensate for the biomass loss caused by more but slightly smaller collembolans. In about 20% of the model systems H. fasciculare switched from a growth pattern with a broad contiguous foraging front and uniform growth in all directions to a pattern with fast growing sectors while other sectors stopped growth completely. The switch occurred in grazed systems exclusively; thus we interpret this observation as a fugitive response and as a strategy for quickly escaping from places where grazing pressure is experienced. (C) 2004 Published by Elsevier Ltd MH - Germany MH - Mexico|Tabasco MH - United Kingdom PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Soil Science U5 - J;Article AV - English IS - 0038-0717 UR - ISI:000220786200004 L2 - hypholoma fasciculare;cord-forming fungi;collembola;grazing;microarthropod-microbial interactions;growth strategies;fractal dimension;mycelial extent;hyphal cover;ONYCHIURUS-ARMATUS COLLEMBOLA; MYCELIAL SYSTEMS; PHANEROCHAETE-VELUTINA; MORTIERELLA-ISABELLINA; STROPHARIA-CAERULEA; FRACTAL GEOMETRY; LEAF LITTER; SOIL FAUNA; RESPONSES SO - Soil Biology & Biochemistry 2004 ;36(4):591-599 11238 UI - 4180 AU - Kang YG AU - Carranza AJ AU - Chung CJ AD - Thomas Jefferson Univ, Philadelphia, PA 19107, USAHosp Cent Mil, Mexico City, DF, MexicoDonga Univ, Pusan, South Korea TI - Early diagnosis of fibrinolysis during liver transplantation MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology;Surgery;Transplantation U5 - J;Meeting Abstract AV - English IS - 1527-6465 UR - ISI:000221728300297 SO - Liver Transplantation 2004 ;10(6):C70-C70 11239 UI - 6154 AU - Kang YM AU - Chen JY AU - Ouyang W AU - Qiao JT AU - Reyes-Vazquez C AU - Dafny N AD - Univ Texas, Sch Med, Dept Neurobiol & Anat, Houston, TX 77225, USAShanxi Med Univ, Dept Neurobiol, Taiyuan, Shanxi, Peoples R ChinaUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City, DF, MexicoDafny, N, Univ Texas, Sch Med, Dept Neurobiol & Anat, POB 20708, Houston, TX 77225 USA TI - Serotonin modulates hypothalamic neuronal activity AB - Effects of serotonin (5-HT) on electrophysiological activities of single hypothalamic arcuate neurons in rat brain slices were observed by extracellular recording. The results showed that (1) of 385 arcuate neurons observed, the patterns of spontaneous firing were divided into 3 categories: "slow irregular" (460%), "fast continuous" (22.6%), and "bursting" firing (31.4%); (2) of 149 neurons tested for 5-HT, most (55.0%) responded to the drug by decreasing firing rate, 22.2% by increasing firing rate, 11.4% exhibit biphasic pattern, and 11.4% did not respond to 5-HT application; (3) substitution of low Ca-2-high Mg2+ artificial cerebrospinal fluid (ACSF) for normal ACSF did not abolish the 5-HT-induced excitatory effect while it did abolish the 5-HT-induced inhibitory effect, suggesting the effect in latter cases was elicited by a Ca2+-dependent release of neuroactive substances; (4) cyproheptadine, a non-selective 5-HT receptor antagonist, antagonized the 5-HT-induced excitatory effect in all neurons tested, while pindolol, a 5-HT1A/1B receptor antagonist, antagonized the 5-HT-induced excitatory effect in 50% of neurons tested; (5) both cyproheptadine and pindolol antagonized the 5-HT-induced inhibitory effect; and (6) bicuculline, a GABA(A) receptor antagonist, antagonized the 5-HT-induced inhibitory effect. These results suggest that 5-HT may exert its excitatory effects directly through 5-HT1A/1B and other subtypes of 5-HT-receptors located on the surface of the neurons recorded, while its inhibitory effects are mediated indirectly through the activation of a local inhibitory GABAergic interneuron MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Neurosciences U5 - J;Article AV - English IS - 0020-7454 UR - ISI:000189260100002 L2 - arcuate neurons;Bicuculline;cyproheptadine;pindolol;rat brain slice;serotonin;RAT ARCUATE NUCLEUS; 5-HT3 RECEPTORS; NEUROPEPTIDE-Y; BETA-ENDORPHIN; PARAFASCICULAR NEURONS; LOCUS-COERULEUS; DORSAL RAPHE; STIMULATION; 5-HYDROXYTRYPTAMINE; BRAIN SO - International Journal of Neuroscience 2004 ;114(3):299-319 11240 UI - 5472 AU - Kapoor K AU - Willems EW AU - MaassenVanDenBrink A AU - Heiligers JPC AU - Cordi AA AU - Vayssettes-Courchay C AU - Verbeuren TJ AU - Villalon CM AU - Saxena PR AD - Univ Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsIRIS, Courbevoie, FranceIPN, CINVESTAV, Dept Farmacobiol, Mexico City 07738, DF, MexicoSaxena, PR, Univ Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Assessment of anti-migraine potential of a novel alpha-adrenoceptor agonist S19014: effects on porcine carotid and regional haemodynamics and human coronary artery AB - Taking into account the drawbacks associated with the use of triptans, attempts are being made to explore other avenues for the treatment of migraine. Recently, it has been shown that both alpha(1)- and alpha(2)-adrenoceptors mediate the constriction of porcine carotid arteriovenous anastomoses, which has effectively served as an experimental model predictive of anti-migraine activity. The present study investigated the effects of a novel alpha-adrenoceptor agonist S19014 {spiro[(1,3-diazacyclopent-1-ene)-5 : 2'-(4',5'-dimethylindane)] fumarate} on carotid and systemic haemodynamics in anaesthetized pigs, and on human isolated coronary arteries. Increasing doses of S19014 (1-30 mug/kg, i.v.) produced a dose-dependent initial short-lasting vasopressor response and a decrease of total carotid blood flow and conductance. The carotid blood flow and conductance changes were exclusively due to constriction of carotid arteriovenous anastomoses (capillary blood flow increased) and were accompanied by an increase in arterio-jugular venous oxygen saturation difference. Whereas prazosin (100 mug/kg, i.v.) was ineffective, rauwolscine (300 mug/kg, i.v.) attenuated the responses to S19014. The compound did not much affect the distribution of cardiac output to peripheral organs when compared with the vehicle group. Furthermore, S19014 only slightly contracted the human isolated coronary artery and its contractions, contrary to those of sumatriptan, were not increased in blood vessels pre-contracted with U46619. These results suggest that (i) the systemic and carotid vascular effects of S19014 are mainly mediated by alpha(2)-adrenoceptors, and (ii) S19014 could be effective in the treatment of migraine with an improved cardiovascular tolerance MH - France MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0333-1024 UR - ISI:000221532700002 L2 - alpha-adrenoceptors;arteriovenous anastomoses;cardiac output;microspheres;migraine;prazosin;rauwolscine;S19014;vasoconstriction;ARTERIOVENOUS ANASTOMOSES; BLOOD-FLOW; 5-HT1-LIKE RECEPTORS; ANESTHETIZED PIGS; THORACIC AORTA; SUBTYPES; VASOCONSTRICTION; MIGRAINE; NORADRENALINE; PHARMACOLOGY SO - Cephalalgia 2004 ;24(6):425-438 11241 UI - 4518 AU - Karlovich Y AU - Silbermann B AD - Tech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoSilbermann, B, Tech Univ Chemnitz, Fak Math, D-09107 Chemnitz, Germany TI - Fredholmness of singular integral operators with discrete subexponential groups of shifts on Lebesgue spaces AB - The paper is devoted to an application of a general local method of studying the Fredholmness of nonlocal bounded linear operators to Banach algebras of singular integral operators with piecewise continuous coefficients and discrete subexponential groups of piecewise smooth shifts acting topologically freely on composed contours. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Germany MH - Mexico|Morelos PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0025-584X UR - ISI:000223552800005 L2 - Fredholmness;singular integral operator;functional operator;invertibility;subexponential group of shifts;local method;Banach algebra;symbol SO - Mathematische Nachrichten 2004 ;272():55-94 11242 UI - 3775 AU - Karol M AU - Krishnan P AU - Li JJ AD - Avaya Labs Res, Mexico City 07738, DF, MexicoAvaya Labs Res, Basking Ridge, NJ 07920, USAKarol, M, Avaya Labs Res, 307 Middletown Lincroft Rd, Mexico City 07738, DF, Mexico TI - Using overlay networks to improve VoIP reliability AB - Real-time traffic requires rapid corrective action to counteract the negative effect of network faults. In this paper we propose such a detection and rerouting scheme for VoIP traffic. We use an RTP/RTCP-based detection method to quickly detect network problems. Subsequent packets can then be rerouted using an overlay network approach that avoids failed links and paths with inadequate QoS. This rapid detection and rerouting minimizes the impact of network failures to real-time applications such as VoIP. In this paper, we present the main ideas behind these proposals along with some implementation considerations MH - Mexico|Distrito Federal MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000225163400030 SO - Automated Technology for Verification and Analysis, Proceedings 2004 ;3299():392-401 11243 UI - 6113 AU - Karp PD AU - Arnaud M AU - Collado-Vides J AU - Ingraham J AU - Paulsen IT AU - Saier MH AD - SRI Int, Bioinformat Res Grp, Menlo Pk, CA 94025, USAUNAM, Program Computat Genom, Ctr Nitrogen Fixat, Cuernavaca, Morelos, MexicoInst Genome Res, Rockville, MD, USAUniv Calif Davis, Microbiol Sect, Davis, CA 95616, USAUniv Calif San Diego, Dept Biol Sci, San Diego, CA, USAKarp, PD, SRI Int, Bioinformat Res Grp, 333 Ravenswood Ave, Menlo Pk, CA 94025 USA TI - The E-coli EcoCyc database: No longer just a metabolic pathway database MH - USA MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 24 U4 - Microbiology U5 - J;Article AV - English IS - 0044-7897 UR - ISI:000189352100014 L2 - K-12 SO - Asm News 2004 ;70(1):25-30 11244 UI - 3421 AU - Kartashov YV AU - Egorov AA AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalunya, ICFO, Inst Ciencies Foton, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Americas Puebla, Dept Fis & Matemat, Puebla 72820, MexicoKartashov, YV, Univ Politecn Catalunya, ICFO, Inst Ciencies Foton, ES-08034 Barcelona, Spain TI - Stable soliton complexes and azimuthal switching in modulated Bessel optical lattices AB - We address azimuthally modulated Bessel optical lattices imprinted in focusing cubic Kerr-type nonlinear media, and reveal that such lattices support different types of stable solitons whose complexity increases with the growth of lattice order. We reveal that the azimuthally modulated lattices cause single solitons launched tangentially to the guiding rings to jump along consecutive sites of the optical lattice. The position of the output channel can be varied by small changes of the launching angle MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000226299200006 L2 - 2-DIMENSIONAL PHOTONIC LATTICES; BEAMS; MEDIA; CLUSTERS; LIGHT SO - Physical Review e 2004 ;70(6): 11245 UI - 3424 AU - Kartashov YV AU - Zelenina AS AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalunya, ICFO, Inst Ciencies Foton, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Americas, Dipartimento Matemat & Fis, Puebla, Cholula, MexicoKartashov, YV, Univ Politecn Catalunya, ICFO, Inst Ciencies Foton, ES-08034 Barcelona, Spain TI - Stabilization of vector solitons in optical lattices AB - We address the properties and dynamical stability of one-dimensional vector lattice solitons in a Kerr-type cubic medium with harmonic transverse modulation of the refractive index. We discovered that unstable families of scalar lattice solitons can be stabilized via cross-phase modulation (XPM) in the vector case. It was found that multihumped vector solitons that are unstable in uniform media where the XPM strength is higher than that of self-phase modulation can also be stabilized by the lattice MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000226299200122 L2 - WAVE-GUIDE ARRAYS; DISCRETE SOLITONS; SPATIAL SOLITONS; PULSE-PROPAGATION; PHOTONIC LATTICES SO - Physical Review e 2004 ;70(6): 11246 UI - 3676 AU - Kartashov YV AU - Egorov AA AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalunya, ICFO, Inst Ciencies Foton, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Americas, Dept Fis & Matemat, Puebla 72820, MexicoKartashov, YV, Univ Politecn Catalunya, ICFO, Inst Ciencies Foton, ES-08034 Barcelona, Spain TI - Rotary dipole-mode solitons in Bessel optical lattices AB - We address Bessel optical lattices of radial symmetry imprinted in cubic Kerr-type nonlinear media and show that they support families of stable dipole-mode solitons featuring two out-of-phase light spots located in different lattice rings. We show that the radial symmetry of the Bessel lattices affords a variety of unique soliton dynamics including controlled radiation-free rotation of the dipole-mode solitons MH - Mexico|Puebla MH - Russia MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000225702000003 L2 - optical lattices;solitons;2-DIMENSIONAL PHOTONIC LATTICES; ARRAYS; LIGHT SO - Journal of Optics B-Quantum and Semiclassical Optics 2004 ;6(11):444-447 11247 UI - 4217 AU - Kartashov YV AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalunya, ICFO Inst Ciencies Foton, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, MexicoKartashov, YV, Univ Politecn Catalunya, ICFO Inst Ciencies Foton, ES-08034 Barcelona, Spain TI - Tunable soliton self-bending in optical lattices with nonlocal nonlinearity AB - We address the phenomenon of soliton self-bending in Kerr-type nonlocal nonlinear media with an imprinted transverse periodic modulation of the linear refractive index. We show that the imprinted optical lattice makes possible to control the mobility of soliton by varying the depth and the frequency of the linear refractive index modulation MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000224341600028 L2 - WALKING VECTOR SOLITONS; PHOTONIC LATTICES; SCHRODINGER-EQUATION; SPATIAL SOLITONS; STABILITY; WAVES; BEAMS; MEDIA SO - Physical Review Letters 2004 ;93(15): 11248 UI - 4298 AU - Kartashov YV AU - Crasovan LC AU - Zelenina AS AU - Vysloukh VA AU - Sanpera A AU - Lewenstein M AU - Torner L AD - Univ Politecn Catalunya, ICFO Inst Ciencias Foton, Barcelona 08034, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, Barcelona 08034, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaInst Atom Phys, Dept Theoret Phys, Bucharest, RomaniaUniv Amer Puebla, Dept Fis & Matemat, Puebla, Cholula, MexicoInst Theoret Phys, D-30167 Hannover, GermanyKartashov, YV, Univ Politecn Catalunya, ICFO Inst Ciencias Foton, Barcelona 08034, Spain TI - Soliton eigenvalue control in optical lattices AB - We address the dynamics of higher-order solitons in optical lattices, and predict their self-splitting into the set of their single-soliton constituents. The splitting is induced by the potential introduced by the lattice, together with the imprinting of a phase tilt onto the initial multisoliton states. The phenomenon allows the controllable generation of several coherent solitons linked via their Zakharov-Shabat eigenvalues. Application of the scheme to the generation of correlated matter waves in Bose-Einstein condensates is discussed MH - Germany MH - Mexico|Puebla MH - Romania MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000224211900023 L2 - NONLINEAR SCHRODINGER-EQUATION; BOSE-EINSTEIN CONDENSATE; DISCRETE SOLITONS; PHOTONIC LATTICES; BOUND-STATES; FISSION; ARRAYS; PERTURBATIONS; PROPAGATION; WAVELENGTH SO - Physical Review Letters 2004 ;93(14): 11249 UI - 4467 AU - Kartashov YV AU - Vysloukh VA AD - Univ Politecn Catalunya, ICFO Inst Ciencies Foton, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, MexicoKartashov, YV, Univ Politecn Catalunya, ICFO Inst Ciencies Foton, ES-08034 Barcelona, Spain TI - Resonant phenomena in nonlinearly managed lattice solitons AB - The formation of nonlinearly managed spatial solitons in Kerr-type nonlinear media with transverse periodic modulation of the refractive index is considered. The phenomenon of resonant enhancement of lattice soliton amplitude oscillations is reported. We show how the tunable discreteness and competition between such characteristic scales as the beam width and the lattice period influence propagation dynamics and properties of breathing lattice solitons MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000223784600080 L2 - PHOTONIC LATTICES; DISPERSION SO - Physical Review e 2004 ;70(2): 11250 UI - 4573 AU - Kartashov YV AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalun, ICFO Inst Ciencies Foton, Barcelona 08034, SpainUniv Politecn Catalun, Dept Signal Theory & Commun, Barcelona 08034, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Santa Catarina 72820, Puebla, MexicoKartashov, YV, Univ Politecn Catalun, ICFO Inst Ciencies Foton, Barcelona 08034, Spain TI - Rotary solitons in Bessel optical lattices AB - We introduce solitons supported by Bessel photonic lattices in cubic nonlinear media. We show that the cylindrical geometry of the lattice, with several concentric rings, affords unique soliton properties and dynamics. In particular, in addition to the lowest-order solitons trapped in the center of the lattice, we find soliton families trapped at different lattice rings. Such solitons can be set into controlled rotation inside each ring, thus featuring novel types of in-ring and inter-ring soliton interactions MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 49 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000223555600028 L2 - COUPLED WAVE-GUIDES; PHOTONIC LATTICES; DISCRETE SOLITONS; ARRAYS; BEAMS; GENERATION; DIFFRACTION SO - Physical Review Letters 2004 ;93(9): 11251 UI - 5252 AU - Kartashov YV AU - Egorov AA AU - Vysloukh VA AU - Torner L AD - Univ Politecn Cataluna, ICFO, Inst Ciencies Foton, E-08034 Barcelona, SpainUniv Politecn Cataluna, ICFO, Dept Signal Theory & Commun, E-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, Cholula, MexicoKartashov, YV, Univ Politecn Cataluna, ICFO, Inst Ciencies Foton, E-08034 Barcelona, Spain TI - Stable one-dimensional periodic waves in Kerr-type saturable and quadratic nonlinear media AB - We review the latest progress and properties of the families of bright and dark one-dimensional periodic waves propagating in saturable Kerr-type and quadratic nonlinear media. We show how saturation of the nonlinear response results in the appearance of stability (instability) bands in a focusing (defocusing) medium, which is in sharp contrast with the properties of periodic waves in Kerr media. One of the key results discovered is the stabilization of multicolour periodic waves in quadratic media. In particular, dark-type waves are shown to be metastable, while bright-type waves are completely stable in a broad range of energy flows and material parameters. This yields the first known example of completely stable periodic wave patterns propagating in conservative uniform media supporting bright solitons. Such results open the way to the experimental observation of the corresponding self-sustained periodic wave patterns MH - Mexico|Puebla MH - Russia MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000221920000017 L2 - optical solitons;cnoidal waves;SWIFT-HOHENBERG EQUATION; SELF-FREQUENCY SHIFT; CNOIDAL WAVES; SOLITARY WAVES; MODULATIONAL INSTABILITY; SCHRODINGER-EQUATION; SCREENING SOLITONS; SPATIAL SOLITONS; STABILITY; COMPRESSION SO - Journal of Optics B-Quantum and Semiclassical Optics 2004 ;6(5):S279-S287 11252 UI - 5329 AU - Kartashov YV AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalunya, Inst Ciencies Foton, ICFO, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow, RussiaUniv Americas, Dept Fis & Matemat, Puebla, Cholula, MexicoKartashov, YV, Univ Politecn Catalunya, Inst Ciencies Foton, ICFO, ES-08034 Barcelona, Spain TI - Packing, unpacking, and steering of multicolor solitons in optical lattices AB - We discuss potential applications of multicolor solitons supported by periodic lattices imprinted in quadratic nonlinear media. Such lattice solitons can be packed together with appropriate relative phases to form stable soliton trains that can be treated as bit sequences. We describe controllable splitting of the trains into their soliton constituents and the angle- and power-controlled steering and trapping of solitons moving across the lattice into the desired guiding channel. (C) 2004 Optical Society of America MH - Mexico|Puebla MH - Russia MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000221756000031 L2 - WAVE-GUIDE ARRAYS; BRIGHT SOLITARY WAVES; NONLINEAR MEDIA SO - Optics Letters 2004 ;29(12):1399-1401 11253 UI - 5551 AU - Kartashov YV AU - Vysloukh VA AU - Egorov AA AU - Zelenina AS AD - Univ Politecn Cataluna, ICFO, Inst Ciencias Foton, E-08034 Barcelona, SpainUniv Politecn Cataluna, ICFO, Dept Signal Theory & Commun, E-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, MexicoKartashov, YV, Univ Politecn Cataluna, ICFO, Inst Ciencias Foton, E-08034 Barcelona, Spain TI - Stable periodic waves supported by competing cubic-quintic nonlinearity AB - We perform a linear stability analysis of stationary periodic waves in cubic-quintic nonlinear media and show that weak x((5)) nonlinearity can lead to stabilization of cnoidal and destabilization of snoidal periodic wave patterns existing in focusing and defocusing x((3)) media, respectively. Direct computer simulations confirm results of the linear stability analysis. The stabilization of periodic waves is expected to be a common phenomenon in physical systems where focusing-defocusing, attractive-repulsive, nonlinear self-actions compete with each other. (C) 2004 Optical Society of America MH - Mexico|Puebla MH - Russia MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000221234800015 L2 - TRANSVERSE MODULATIONAL INSTABILITY; SCHRODINGER-EQUATION; CHALCOGENIDE GLASSES; GAP SOLITONS; STABILITY; MEDIA SO - Journal of the Optical Society of America B-Optical Physics 2004 ;21(5):982-988 11254 UI - 5589 AU - Kartashov YV AU - Torner L AU - Vysloukh VA AD - Univ Politecn Catalunya, ICFO, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainUniv Amer Puebla, Dept Fis & Matemat, Puebla, Cholula, MexicoKartashov, YV, Univ Politecn Catalunya, ICFO, ES-08034 Barcelona, Spain TI - Parametric amplification of soliton steering in optical lattices AB - We report on the effect of parametric amplification of spatial soliton swinging in Kerr-type nonlinear media with longitudinal and transverse periodic modulation of the linear refractive index. The parameter areas are found where the soliton center motion is analogous to the motion of a parametrically driven pendulum. This effect has potential applications for controllable soliton steering. (C) 2004 Optical Society of America MH - Mexico|Puebla MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 24 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000221189400020 L2 - WAVE-GUIDE ARRAYS; DISCRETE SOLITONS SO - Optics Letters 2004 ;29(10):1102-1104 11255 UI - 5590 AU - Kartashov YV AU - Torner L AU - Vysloukh VA AD - Univ Politecn Catalunya, Inst Ciencies Foton, Barcelona 08034, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, Barcelona 08034, SpainUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, Cholula, MexicoKartashov, YV, Univ Politecn Catalunya, Inst Ciencies Foton, Barcelona 08034, Spain TI - Multicolor lattice solitons AB - We report on the existence of multicolor solitons supported by periodic lattices made from quadratic nonlinear media. Such lattice solitons bridge the gap between continuous solitons in uniform media and discrete solitons in strongly localized systems and exhibit a wealth of new features. We discovered that, in contrast to uniform media, multipeaked lattice solitons are stable. Thus they open new opportunities for all-optical switching based on soliton packets. (C) 2004 Optical Society of America MH - Mexico|Puebla MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000221189400025 L2 - WAVE-GUIDE ARRAYS; BRIGHT SOLITARY WAVES; NONLINEAR MEDIA SO - Optics Letters 2004 ;29(10):1117-1119 11256 UI - 5923 AU - Kartashov YV AU - Zelenina AS AU - Torner L AU - Vysloukh VA AD - Univ Politecn Catalunya, Inst Ciencies Foton, ICFO, ES-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, ES-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72820, Cholula, MexicoKartashov, YV, Univ Politecn Catalunya, Inst Ciencies Foton, ICFO, ES-08034 Barcelona, Spain TI - Spatial soliton switching in quasi-continuous optical arrays AB - We report on the phenomenon of trapping and switching of one-dimensional spatial solitons in Kerr-type nonlinear media with transverse periodic modulation of the refractive index. The solitons slowly radiate upon propagation along the periodic structure and are finally trapped in one of its guiding channels. The position of the output channel can be varied by small changes in the launching angle. 0 2004 Optical Society of America MH - Mexico|Puebla MH - Russia MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 39 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000220362700036 L2 - WAVE-GUIDE ARRAYS; DISCRETE SOLITONS; LATTICES SO - Optics Letters 2004 ;29(7):766-768 11257 UI - 6378 AU - Kartashov YV AU - Egorov AA AU - Zelenina AS AU - Vysloukh VA AU - Torner L AD - Univ Politecn Catalunya, Inst Ciencies Foton, ICFO, E-08034 Barcelona, SpainUniv Politecn Catalunya, Dept Signal Theory & Commun, E-08034 Barcelona, SpainMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, RussiaUniv Amer Puebla, Dept Fis & Matemat, Puebla 72829, Cholula, MexicoKartashov, YV, Univ Politecn Catalunya, Inst Ciencies Foton, ICFO, E-08034 Barcelona, Spain TI - Stable multicolor periodic-wave arrays AB - We study the existence and stability of periodic-wave arrays propagating in uniform quadratic nonlinear media and discover that they become completely stable above a threshold light intensity. To the best of our knowledge, this is the first example in physics of completely stable periodic-wave patterns propagating in conservative uniform media supporting bright solitons MH - Mexico|Puebla MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000188392800025 L2 - SWIFT-HOHENBERG EQUATION; SOLITARY WAVES; MODULATIONAL INSTABILITY; SCHRODINGER-EQUATION; CNOIDAL WAVES; SOLITONS; STABILITY; MEDIA SO - Physical Review Letters 2004 ;92(3): 11258 UI - 5699 AU - Kashiyama Y AU - Fastovsky DE AU - Rutherford S AU - King J AU - Montellano M AD - Univ Rhode Isl, Dept Geosci, Kingston, RI 02881, USAUniv Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882, USANatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoKashiyama, Y, Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, 7-3-1 Hongo, Tokyo 1130033, Japan TI - Genesis of a locality of exceptional fossil preservation: paleoenvironments of Tepexi de Rodriguez (mid-Cretaceous, Puebla, Mexico) (vol 24, pg 407, 2003) AB - This study of Tepexi de Rodriguez (Puebla, Mexico), a mid-Cretaceous (Aptian?) locality with exceptional fossil preservation, combines statistically based microfacies-transition analysis with spectral analysis of depth-series measurements, in an attempt to constrain the paleoenvironmental setting. Tepexi de Rodriguez (Tepexi) is largely composed of laminated micrites, and presents a complex amalgam of primary and diagenetically altered fabrics. Modified Markov analysis of microfacies successions was used to assess repetitive patterns among primary microfacies. The reconstructed microfacies succession indicates recurring upward-fining sequences. Spectral analysis of depth-series measurements of magnetic susceptibility and RGB visible color (redness) reveals a pattern of repetition in the sedimentary sequence that is concordant with patterns of Milankovitch cyclicity. Strong eccentricity, obliquity, and semi-precessional signals are inferred. This suite of Milankovitch cyclicities is attributed to double-monsoon influences on Tepexi from both the northern and southern hemispheres, and implies an average rock accumulation rate. of 2.0 cm/ kyr. Previous reconstructions of Tepexi (e.g. a variety of back-reef lagoonal settings) do not match the observations reported here. Likewise, tidally influenced deposition is ruled out. Tepexi de Rodriguez appears to have been an open marine basin with storm-dominated sedimentation and bottom waters with restricted circulation. The fossil biota has a strong terrestrial influence, indicating that land was close by. (C) 2003 Elsevier Ltd. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geology;Paleontology U5 - J;Correction AV - English IS - 0195-6671 UR - ISI:000220990400009 L2 - exceptional fossil preservation;Lagerstatte;mid-Cetaceous;limestone;Mexico;transition analysis;magnetic susceptibility;depth-series;spectral analysis;Milankovitch cycles;multiple linear regression;TLAYUA FORMATION; TIME-SERIES; SEA-LEVEL; CYCLES; PLEISTOCENE; CLIMATE; SEDIMENTATION; DEPOSITION; REPTILIA; ILLINOIS SO - Cretaceous Research 2004 ;25(1):151-+ 11259 UI - 3827 AU - Kaufer-Horwitz M AU - Bermudez OI AU - Valdes-Ramos R AU - Solomons NW AD - FUNSALUD, Fdn Mexicana Salud, Mexico City 14610, DF, MexicoTufts Univ, USDA, Human Nutr Res Ctr Aging, Boston, MA 02111, USAUniv Autonoma Estado Mexico, Fac Med, Edo Mexico 50000, MexicoKaufer-Horwitz, M, FUNSALUD, Fdn Mexicana Salud, Periferico 4809, Mexico City 14610, DF, Mexico TI - Rigid adherence to the dietary intake recommendations of selected food guideline emblems would not lead to simultaneous compliance with the tenets of the revised 2000 American Heart Association Dietary Guidelines AB - A total of 13 national and 25 variant dietary guideline emblems, among 58 examined, were found to provide quantitative behavioral recommendations regarding the consumption of foods or food groups. Of the 12 specific recommendations of the 2000 Revised Dietary Guidelines of the American Heart Association (AHA), seven were related to specific dietary practices that occur in one or another emblem. To determine how well a strict adherence to the tenets of a quantitative emblem would simultaneously advance the AHA behavioral agenda, an exercise for the classification rating of the selected emblems was conducted. The number of AHA specific recommendations incorporated into the emblems ranged from 1/7 to 6/7, with a median of 2/7. The two AHA recommendation s that were most often embodied in emblems were compliance with variety of fruits/vegetables (95%) and variety of grain products (87%). Clear guidance for five of the A14A Dietary Guidelines cannot be found in the emblems. Although dietary guideline emblems make some contribution for maximal cardiovascular prevention inpopulations, individuals must be educated to go well beyond sketchy. and incomplete guidance given by the emblems. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0271-5317 UR - ISI:000225174500008 L2 - food guide pyramid;dietary guidelines;American Heart Association;cardiovascular disease;preventive health;behavior change;PLASMA-LIPOPROTEINS; NUTRITION SO - Nutrition Research 2004 ;24(9):749-759 11260 UI - 3930 AU - Kawazu Y AU - Watanabe T AU - Totani K AU - Ogawa T AD - Tokyo Univ Agr & Technol, Grad Sch Technol, Koganei, Tokyo 1848588, JapanUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoKawazu, Y, Tokyo Univ Agr & Technol, Grad Sch Technol, 2-24-16 Nakacho, Koganei, Tokyo 1848588, Japan TI - Effects of polymer backbone on second order nonlinear optical coefficients AB - Polydiacethylene copolymers having different polymer backbone were synthesized consisting of same chromophore, such as dispersed red 19. Effects of polymer backbone on second-order nonlinear optical coefficients were investigated. The thin films of polydiacethylene were prepared by coating on soda-lime glass substrate and poled by corona poling at elevating temperature. The second-order NLO coefficients d(33) of the films were measured by in situ second-harmonic generation measurements and Maker fringe measurements. The d(33)/d(31) were deduced as 6.0 and 2.3 for polymer having p-cinnamate backbone and polymer having m-cinnamate at 1064 nm fundamental wavelength, respectively. The orientation order parameter is strongly depends on polymer backbone. To understand the temperature effects to the orientation thermal stability of polydiacethylene, the decay of second harmonic generation intensity were measured. The depoling experimental results showed that the orientation stability of p-cinnamate backbone is higher than that of m-cinnamate backbone. The order parameter and SHG decay of copolymer were also investigated MH - Japan MH - Mexico|Distrito Federal PB - TOKYO: SOC FIBER SCI TECHNOL RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Textiles;Polymer Science U5 - J;Article AV - Japanese IS - 0037-9875 UR - ISI:000224943800052 L2 - CHROMOPHORES; FILMS SO - Sen-I Gakkaishi 2004 ;60(6):188-192 11261 UI - 5318 AU - Kaziev GZ AU - Dutov AA AU - Quinones SH AU - Bel'skii VK AU - Zavodnik VE AU - Hernandez-Perez T AU - Kanaev AA AD - Moscow State Pedag Univ, Moscow 119882, RussiaUniv Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoLY Karpov Phys Chem Res Inst, Moscow 103064, RussiaKaziev, GZ, Moscow State Pedag Univ, Ul Malaya Pirogovskaya 1, Moscow 119882, Russia TI - Synthesis and X-ray diffraction of potassium decamolybdodicobaltate(III) AB - Potassium decamolybdodicobaltate(III) K-6[Co2Mo10O34(OH)(4)] (.) 7H(2)O was synthesized and studied by X-ray diffraction. The crystals are monoclinic, space group P2(1)/c, a = 11.783(2) Angstrom, b = 11.629(2) Angstrom, c = 29.748(2)Angstrom, beta = 95.36(3)degrees, Z = 4, V = 4058.4(13) Angstrom(3), rho(calcd) = 3.355g/cm(3) MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0036-0236 UR - ISI:000221777700005 L2 - HETEROPOLY COMPOUNDS; HEXAMOLYBDOCHROMATE(III); CHEMISTRY; CATALYSIS SO - Russian Journal of Inorganic Chemistry 2004 ;49(5):678-684 11262 UI - 4973 AU - Kazmi WH AU - Obrador GT AU - Khan SS AU - Pereira BJG AU - Kausz AT AD - Tufts Univ, New England Med Ctr, Div Nephrol, Dept Med, Boston, MA 02111, USAUniv Panamericana, Sch Med, Mexico City, DF, MexicoKausz, AT, Tufts Univ, New England Med Ctr, Div Nephrol, Dept Med, Box 391,750 Washington St, Boston, MA 02111 USA TI - Late nephrology referral and mortality among patients with end-stage renal disease: a propensity score analysis AB - Background. Late nephrology referral has been associated with adverse outcomes among patients with end-stage renal disease; however, its relationship to mortality is unclear. We examined the impact of timing of nephrology care relative to initiation of dialysis on mortality after initiation of dialysis. Methods. Data from the Dialysis Morbidity and Mortality Study - Wave II, a prospective study of incident dialysis patients, were used. Late referral (LR) was defined as first nephrology visit < 4 months and early referral (ER) as first nephrology visit greater than or equal to4 months prior to initiation of dialysis. Propensity scores (PS) were estimated using logistic regression to predict the probability that a given patient was LR. A Cox proportional hazards model was built to examine the association between timing of nephrology referral and mortality. Results. The cohort was comprised of 2195 patients: 54% were males, 66% were Caucasians, 26% were African-Americans and 33% were referred late. A Cox proportional hazards analysis demonstrated that compared with ER patients, LR patients had a 44% higher risk of death at 1 year after initiation of dialysis [hazards ratio (HR) = 1.44; 95% confidence interval (CI): 1.15-1.80], which remained significant after adjusting for quintiles of PS (HR = 1.42; 95% CI: 1.12-1.80). Conclusions. Among patients with chronic kidney disease (CKD) who initiated dialysis, LR was associated with higher risk of death at 1 year after initiation of dialysis compared with ER MH - USA MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 21 U4 - Transplantation;Urology & Nephrology U5 - J;Article AV - English IS - 0931-0509 UR - ISI:000222530500022 L2 - chronic kidney disease;end-stage renal disease;late referral;mortality;MAINTENANCE DIALYSIS; UNITED-STATES; CARE; PREVALENCE; IMPACT; LEVEL SO - Nephrology Dialysis Transplantation 2004 ;19(7):1808-1814 11263 UI - 4025 AU - Kehler J AU - Tolkunova E AU - Koschorz B AU - Pesce M AU - Gentile L AU - Boiani M AU - Lomeli H AU - Nagy A AU - McLaughlin KJ AU - Scholer HR AU - Tomilin A AD - Univ Penn, New Bolton Ctr, Ctr Anim Transgenesis & Germ Cell Res, Germline Dev Grp, Kennett Sq, PA 19348, USAMax Planck Inst Immunbiol, Dept Dev Biol, D-79108 Freiburg, GermanyCtr Cardiol, Lab Biol Vasc & Terapia Gen, I-20138 Milan, ItalyMax Planck Inst Mol Biomed, Dept Cell & Dev Biol, D-48149 Munster, GermanyUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet & Fisiol Mol, Cuernavaca 62271, Morelos, MexicoMt Sinai Hosp, Samuel Lunenfeld Res Inst, Toronto, ON M5G 1X5, CanadaUniv Penn, New Bolton Ctr, Ctr Anim Transgenesis & Germ Cell Res, Dev Epigenet Grp, Kennett Sq, PA 19348, USAScholer, HR, Max Planck Inst Mol Biomed, Dept Cell & Dev Biol, Mendelstr 7, D-48149 Munster, Germany TI - Oct4 is required for primordial germ cell survival AB - Previous studies have shown that Oct4 has an essential role in maintaining pluripotency of cells of the inner cell mass (ICM) and embryonic stem cells. However, Oct4 null homozygous embryos die around the time of implantation, thus precluding further analysis of gene function during development. We have used the conditional Cre/loxP gene targeting strategy to assess Oct4 function in primordial germ cells (PGCs). Loss of Oct4 function leads to apoptosis of PGCs rather than to differentiation into a trophectodermal lineage, as has been described for Oct4-deficient ICM cells. These new results suggest a previously unknown function of Oct4 in maintaining viability of mammalian germline MH - Canada MH - Germany MH - Italy MH - Mexico|Morelos MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 72 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1469-221X UR - ISI:000224816200012 L2 - Oct4 function;primordial germ cells;conditional gene targeting;Cre/loxP;apoptosis;TRANSCRIPTION FACTOR; MOUSE EMBRYO; STEM-CELLS; MAMMALIAN EMBRYO; MIGRATION; DIFFERENTIATION; GENE; PROLIFERATION; EXPRESSION; LINEAGES SO - Embo Reports 2004 ;5(11):1078-1083 11264 UI - 4240 AU - Keller AM AU - Mennel R AU - Georgoulias VA AU - Nabholtz JM AU - Erazo A AU - Lluch A AU - Vogel CL AU - Kaufmann M AU - von Minckwitz G AU - Henderson IC AU - Mellars L AU - Alland L AU - Tendler C AD - US Oncol Inc, Canc Care Associates, Tulsa, OK 74136, USAUS Oncol, Dallas, TX, USAUniv Hosp Herakl, Iraklion, Crete, GreeceCross Canc Inst, Edmonton, AB T6G 1Z2, CanadaCtr Med Nacl, ISSSTE, Mexico City, DF, MexicoUniv Valencia, Hosp Clin, Valencia, SpainAventura Concorde Ctr 2, Aventura, FL, USAUniv Frankfurt, Dept Gynecol & Obstet, D-6000 Frankfurt, GermanyUniv Calif San Francisco, San Francisco, CA 94143, USASchering Plough Res Inst, Kenilworth, NJ, USAKeller, AM, US Oncol Inc, Canc Care Associates, 6151 S Yake, Tulsa, OK 74136 USA TI - Randomized phase III trial of pegylated liposomal doxorubicin versus vinorelbine or mitomycin C plus vinblastine in women with taxane-refractory advanced breast cancer AB - Purpose To compare the efficacy of pegylated liposomal doxorubicin (PLD) with that of a common salvage regimen (comparator) in patients with taxane-refractory advanced breast cancer. Patients and Methods Following failure of a first- or second-line taxane-containing regimen for metastatic disease, 301 women were randomly assigned to receive PLD (50 mg/m(2) every 28 days); or comparator-vinorelbine (30 mg/m(2) weekly) or mitomycin C (10 mg/m(2) day 1 and every 28 days) plus vinblastine (5 mg/m(2) day 1, day 14, day 28, and day 42) every 6 to 8 weeks. Patients were stratified before random assignment based on number of previous chemotherapy regimens for metastatic disease and presence of bone metastases only. Results Progression-free survival (PFS) and overall survival (OS) were similar for PLD and comparator (PFS: hazard ratio [HR], 1.26; 95% Cl, 0.98 to 1.62; P = .11; median, 2.9 months [PLD] and 2.5 months [comparator]; OS: HR, 1.05; 95% Cl, 0.82 to 1.33; P = .71; median, 11.0 months [PLD] and 9.0 months [comparator]). In anthracycline-naive patients, PFS was somewhat longer with PLD, relative to the comparator (n = 44; median PFS, 5.8 v 2.1 months; HR, 2.40; 95% Cl, 1.16 to 4.95; P = .01). Most frequently reported adverse events were nausea (23% to 31%), vomiting (17% to 20%), and fatigue (9% to 20%) and were similar among treatment groups. PLD-treated patients experienced more palmar-plantar erythrodysesthesia (37%; 18% grade 3, 1 patient grade 4) and stomatitis (22%; 5% grades 3/4). Neuropathy (11%), constipation (16%), and neutropenia (14%) were more common with vinorelbine. Alopecia was low in both the PLD and vinorelbine groups (3% and 5%). Conclusion PLD has efficacy comparable to that of common salvage regimens in patients with taxane-refractory metastatic breast cancer, thereby representing a useful therapeutic option. (C) 2004 by American Society of Clinical Oncology MH - USA MH - Canada MH - Germany MH - Greece MH - Mexico|Distrito Federal MH - Spain PB - ALEXANDRIA: AMER SOC CLINICAL ONCOLOGY RP - NOT IN FILE U3 - TC 34 U4 - Oncology U5 - J;Article AV - English IS - 0732-183X UR - ISI:000224281600010 L2 - CARCINOMA SO - Journal of Clinical Oncology 2004 ;22(19):3893-3901 11265 UI - 5915 AU - Keller G AU - Adatte T AU - Stinnesbeck W AU - Rebolledo-Vieyra M AU - Fucugauchi JU AU - Kramar U AU - Stuben D AD - Princeton Univ, Dept Geosci, Princeton, NJ 08540, USAUniv Neuchatel, Inst Geol, CH-2007 Neuchatel, SwitzerlandUniv Karlsruhe, Inst Mineral & Geochem, D-76128 Karlsruhe, GermanyCEA, UMR CRNS, Lab Sci Clim & Environm, F-91198 Gif Sur Yvette, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoKeller, G, Princeton Univ, Dept Geosci, Princeton, NJ 08540, USA TI - Chicxulub impact predates the K-T boundary mass extinction AB - Since the early 1990s the Chicxulub crater on Yucatan, Mexico, has been hailed as the smoking gun that proves the hypothesis that an asteroid killed the dinosaurs and caused the mass extinction of many other organisms at the Cretaceous-Tertiary (K-T) boundary 65 million years ago. Here, we report evidence from a previously uninvestigated core, Yaxcopoil-1, drilled within the Chicxulub crater, indicating that this impact predated the K-T boundary by approximate to300,000 years and thus did not cause the end-Cretaceous mass extinction as commonly believed. The evidence supporting a preK-T age was obtained from Yaxcopoil-1 based on five independent proxies, each with characteristic signals across the K-T transition: sedimentology, biostratigraphy, magnetostratigraphy, stable isotopes, and iridium. These data are consistent with earlier evidence for a late Maastrichtian age of the microtektite deposits in northeastern Mexico MH - France MH - Germany MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 25 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000220314500009 L2 - CRETACEOUS-TERTIARY BOUNDARY; NORTHEASTERN MEXICO; DEPOSITS; CRATER; END; STRATIGRAPHY; TRANSITION; TEKTITES; BEARING; EVENT SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(11):3753-3758 11266 UI - 3576 AU - Kendall NR AU - Gutierrez CG AU - Scaramuzzi RJ AU - Baird DT AU - Webb R AU - Campbell BK AD - Univ Nottingham, Div Agr & Environm Sci, Sch Biosci, Sutton LE12 5RD, Surrey, EnglandQueens Med Ctr, Sch Human Dev, Div Obstet & Gynaecol, Nottingham NG7 2UH, EnglandUniv Nacl Autonoma Mexico, Fac Med Vet, Mexico City 04510, DF, MexicoUniv London Royal Vet Coll, Dept Vet Basic Sci, N Mymms AL9 7TA, Herts, EnglandUniv Edinburgh, Ctr Reprod Biol, Dept Obstet & Gynaecol, Edinburgh EH3 9EW, Midlothian, ScotlandKendall, NR, Univ Nottingham, Div Anim Physiol, Sch Biosci, Sutton LE12 5RD, Surrey, England TI - Direct in vivo effects of leptin on ovarian steroidogenesis in sheep AB - Leptin, the metabolic fat hormone, has been shown to have effects on reproduction in mice and to modulate steroidproduction by cultured ovarian somatic cells in a number of species. However, a direct role of leptin on normal ovarian function in vivo has not been shown. in this paper the effect of passive immunisation against leptin (experiment 1; 20 ml antiserum or non-immune plasma i.v.; n = 6/treatment) and direct ovarian infusion of leptin (experiment 2; 0, 2 or 20 mug recombinant ovine leptin; n = 4/treatment) during the early follicular phase was investigated in sheep with ovarian autotransplants, which allow recovery of ovarian venous blood and regular non-invasive scanning of the ovary. Passive immunisation against leptin resulted in an acute increase (P < 0.05) in ovarian oestradiol secretion but had no effect on gonadotrophin concentrations, ovulation or subsequent luteal function. Conversely, direct ovarian arterial infusion of the low dose of leptin resulted in an acute decline (P < 0.05) in ovarian oestradiol secretion whereas the high dose, which resulted in supra-physiological leptin concentrations, had no effect on oestradiol production compared with the controls. Neither dose of leptin had any effect on gonadotrophin concentrations or ovulation but both doses resulted in an increase (P < 0.05) in progesterone concentrations over the subsequent luteal phase. In conclusion, together these data provide strong in vivo evidence that leptin can modulate ovarian steroidogenesis directly and acutely in ruminants and suggest that leptin is an alternate regulatory system whereby nutritional status can regulate reproductive activity MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: BIO SCIENTIFICA LTD RP - NOT IN FILE U3 - TC 11 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1470-1626 UR - ISI:000225832700012 L2 - GROWTH-FACTOR-I; MESSENGER-RIBONUCLEIC-ACID; BOVINE CORPUS-LUTEUM; OBESE GENE-PRODUCT; ESTROUS-CYCLE; HORMONE-SECRETION; GRANULOSA-CELLS; AUTOTRANSPLANTED OVARY; FOLLICULAR DEVELOPMENT; ARTERIAL INFUSION SO - Reproduction 2004 ;128(6):757-765 11267 UI - 4979 AU - Kendler D AU - Kung AWC AU - Fuleihan GEH AU - Gonzalez JGG AU - Gaines KA AU - Verbruggen N AU - Melton ME AD - St Vincents Hosp, Vancouver, BC V5Z 2N6, CanadaQueen Mary Hosp, Hong Kong, Hong Kong, Peoples R ChinaAmer Univ Beirut, Ctr Med, Beirut, LebanonUniv Autonoma Nuevo Leon, Nuevo Leon, MexicoMerck & Co Inc, Whitehouse Stn, NJ, USAMerck Sharp & Dohme Inc Europe, Brussels, BelgiumKendler, D, St Vincents Hosp, 120-809 W 41 Ave, Vancouver, BC V5Z 2N6, Canada TI - Patients with osteoporosis prefer once weekly to once daily dosing with alendronate AB - Objectives: Once weekly dosing of alendronate has been shown to provide equivalent efficacy to once daily dosing for treatment of osteoporosis in postmenopausal women. Whether patients will prefer weekly dosing to daily dosing for a chronic condition such as osteoporosis has not been studied. The aim of this international study was to assess preference for the weekly or daily dosing regimen of alendronate among postmenopausal women with osteoporosis. Methods: This randomised open-label crossover study was conducted at 45 study sites in 19 countries. Four hundred and six postmenopausal women with osteoporosis were assigned randomly to treatment with either alendronate 70 mg once weekly for 4 weeks followed by alendronate 10 mg once daily for 4 weeks or vice versa. The main outcome was the responses of the participants to the Dosing Regimen Questionnaire administered at the end of the study. Results: Of the participants expressing a preference, 84% preferred the once weekly dosing regimen with alendronate to the once daily dosing regimen. In addition, the once weekly regimen was considered by 87% of the participants to be more convenient and was the regimen most of the participants (84%) would be more willing to take for a long period of time (P < 0.001 for each parameter). Conclusions: The majority of postmenopausal women with osteoporosis preferred the once weekly to the once daily dosing regimen of alendronate. Physicians should consider patient preference for dosing regimen when selecting the appropriate treatment for osteoporosis. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Belgium MH - Canada MH - Lebanon MH - Mexico|Nuevo Leon MH - Peoples R China MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 32 U4 - Geriatrics & Gerontology;Obstetrics & Gynecology U5 - J;Article AV - English IS - 0378-5122 UR - ISI:000222567800008 L2 - alendronate;weekly;preference;osteoporosis;TERM MALARIA PROPHYLAXIS; MEFLOQUINE SO - Maturitas 2004 ;48(3):243-251 11268 UI - 4825 AU - Keppie JD AU - Sandberg CA AU - Miller BV AU - Sanchez-Zavala JL AU - Nance RD AU - Poole FG AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoFed Ctr, US Geol Survey, Denver, CO 80225, USAKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Implications of latest Pennsylvanian to middle Permian paleontological and U-PbSHRIMP data from the tecomate formation to re-dating tectonothermal events in the Acatlan complex, southern Mexico AB - Limestones in the highly, deformed Tecomate Formation, uppermost unit of the Acatlan Complex, are latest Pennsylvanian-earliest Middle Permian in age rather than Devonian, the latter based on less diagnostic fossils. conodont collections from two marble horizons now constrain its age to range from latest Pennsylvanian to latest Early Permian or early Middle Permian. The older collection contains Gondolella sp., Neostreptognathodus sp., and Streptognathodus sp., suggesting an oldest age limit close to the Pennsylvanian-Permian time boundary. The other collection contains Sweet-ognathus subsymmetricus, a short-lived species ranging only from Kungurian (latest Leonardian) to Wordian (earliest Guadelupian: 272 +/- 4 to 264 +/- 2 Ma). A fusilinid Parafusulina c.f. P antimonioensis Dunbar. in a third Tecomate marble horizon is probably Wordian (early Guadelupian. early Middle Permian). Furthermore, granite pebbles in a Tecomate conglomerate have yielded similar to320-264 Ma U-Pb SHRIMP ages probably derived from the similar to288 Ma, are-related Totoltepec pluton. Collectively, these data suggest a correlation With two nearby units: (1) the Missourian-Leonardian carbonate horizons separated by a Wolfcampian(?) conglomerate in the upper part of the less deformed San Salvador Patlanoaya Formation; and (2) the elastic, Westphalian-Leonardian Matzitzi Formation. This requires that deformation in the Tecomate Formation be of Early-Middle Permian age rather than Devonian. These three formations are re-interpreted as periarc deposits with deformation related to oblique subduction. The revised dating of the Tecomate Formation is consistent with new data, which indicates that the unconformity between the Tecomate and the Piaxtla Group is mid-Carboniferous and corresponds to a tectonothermal event MH - Mexico|Distrito Federal MH - USA PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 8 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000223035200005 L2 - FUSULINIDS; EVOLUTION; VALLEY SO - International Geology Review 2004 ;46(8):745-753 11269 UI - 6569 AU - Keppie JD AU - Nance RD AU - Dostal J AU - Ortega-Rivera A AU - Miller BV AU - Fox D AU - Muise J AU - Powell JT AU - Mumma SA AU - Lee JWK AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoOhio Univ, Dept Geol Sci, Athens, OH 45701, USASt Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaUniv Nacl Autonoma Mexico, Ctr Geociencias, Mexico City 76001, DF, MexicoUniv N Carolina, Dept Geol Sci, Chapel Hill, NC 27599, USAQueens Univ, Dept Geol, Kingston, ON K7L 3NG, CanadaKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Mid-jurassic tectonothermal event superposed on a Paleozoic geological record in the Acatlan Complex of southern Mexico: Hotspot activity during the breakup of Pangea AB - U-Pb isotopic analyses of zircon from the lowest structural units of the Acatlan Complex of southern Mexico indicate that Paleozoic tectonothermal events are overprinted by mid-Jurassic (175+/-3 to 171+/-1 Ma), low pressure migmatization (5-6 kb), polyphase deformation, and intrusion of felsic and mafic magmas. Ensuing rapid cooling recorded by, Ar-40/Ar-39 muscovite, biotite and K-feldspar ages is estimated to have taken place at 21+/-3degreesC/my at exhumation rates of 0.6 mm/yr. Such rapid exhumation requires a combination of erosion and tectonic unroofing that is recorded by top-to-the-west kinematic data. Synchronous tectonic unroofing is also recorded 100 km to the east in the adjacent Oaxaca terrane, where top-to-the-north, extensional shear zones occur in Paleozoic strata. This pattern of extension suggests tectonic unroofing in response to domal uplift (radius > 100 km) like that associated with core complexes, slab windows, and hotspots. Most tectonic analyses for the Jurassic place the Acatlan Complex in the forearc region of an arc in Colombia lying 600-800 km inboard of the subduction zone, presumably in response to flat-slab subduction. Modern analogues suggest that flat-slab subduction reflects subduction of young buoyant oceanic lithosphere adjacent to either a mid-oceanic ridge, or a plume. Since core complexes are typical of arc-backarc regions, and slab windows generally produce metamorphic belts, the forearc setting and associated domal uplift suggest a plume to be the most likely cause of this Jurassic tectonothermal pulse in southern Mexico. This plume activity is synchronous with the opening of the Gulf of Mexico during the breakup of Pangea, to which it may have contributed MH - Canada MH - Mexico|Distrito Federal MH - USA PB - KOCHI: INT ASSOC GONDWANA RESEARCH RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1342-937X UR - ISI:000187851700023 L2 - Mexico;Jurassic;plume;Acatlan Complex;Pangea breakup;METAMORPHIC CORE COMPLEXES; LARGE MAFIC INTRUSION; IVREA-VERBANO ZONE; LOWER CRUST; MANTLE; EVOLUTION; PROVINCE; ORIGIN; FRAGMENTATION; GEOCHEMISTRY SO - Gondwana Research 2004 ;7(1):239-260 11270 UI - 4741 AU - Kerr BJ AU - Kidd MT AU - Cuaron JA AU - Bryant KL AU - Parr TM AU - Maxwell CV AU - Weaver E AD - USDA ARS, MWA, SOMMRU, Natl Swine Res & Informat Ctr, Ames, IA 50011, USAMississippi State Univ, Mississippi State, MS 39762, USAINIFAP, Ctr Nacl Invest Fisiol & Mejoramiento Anim, Queretaro 76020, MexicoAkey, Lewisburg, OH 45338, USAUniv Illinois, Urbana, IL 61801, USAUniv Arkansas, Fayetteville, AR 72701, USAProliant Inc, Ames, IA 50011, USAKerr, BJ, USDA ARS, MWA, SOMMRU, Natl Swine Res & Informat Ctr, NSRIC 2167, Ames, IA 50011 USA TI - Utilization of spray-dried blood cells and crystalline isoleucine in nursery pig diets AB - Three experiments were conducted to evaluate spray-dried blood cells (SDBC) and crystalline isoleucine in nursery pigs. In Exp. 1, 120 pigs were used to evaluate 0, 2, 4, and 6% SDBC (as-fed basis) in a sorghum-based diet. There were six replicates of each treatment and five pigs per pen, with treatments imposed at an initial BW of 9.3 kg and continued for 16 d. Increasing SDBC from 0 to 4% had no effect on ADG, ADFI, and G:F. Pigs fed the 6% SDBC diet had decreased ADG (P < 0.01) and GY (P = 0.06) compared with pigs fed diets containing 0, 2, or 4% SDBC. In Exp. 2, 936 pigs were used to test diets containing 2.5 or 5% SDBC (as-fed basis) vs. two control diets. There were six replicates of each treatment at industry (20 pigs per pen) and university (six pigs per pen) locations. Treatments were imposed at an initial BW of 5.9 and 8.1 kg at the industry and the university locations, respectively, and continued for 16 d. Little effect on pig performance was noted by supplementing 2.5% SDBC, with or without crystalline Ile, in nursery diets. Pigs fed the 5% SDBC diet without crystalline Ile had decreased ADG (P less than or equal to 0.01), ADFI (P less than or equal to 0.10), and GY (P < 0.05) compared with pigs fed the control diets. Supplementation of Ile restored ADG, ADFI, and GY to levels that were not different from that of pigs fed the control diets. In Exp. 3, 1,050 pigs were used to test diets containing 5, 7.5, or 9% SDBC (as-fed basis) vs. a control diet. There were six replicates of each treatment at the industry (20 pigs per pen) location and five replicates at the university (six pigs per pen) locations. Treatments were imposed at an initial BW of 6.3 and 7.0 kg at the industry and university locations, respectively, and continued for 16 d. Supplementation of 5% SDBC without crystalline Ile decreased ADG and GY (P < 0.01) compared with pigs fed the control diet, but addition of Ile increased ADG (P < 0.01) to a level not different from that of pigs fed the control diet. The decreased ADG, ADFI, and GY noted in pigs fed the 7.5% SDBC diet was improved by addition of Ile (P < 0.01), such that ADG and ADFI did not differ from those of pigs fed the control diet. Pigs fed diets containing 9.5% SDBC exhibited decreased ADG, ADFI, and GY (P < 0.01), all of which were improved by Ile addition (P < 0.01); however, ADG (P < 0.05) and GY (P = 0.09) remained lower than for pigs fed the control diet. These data indicate that SDBC can be supplemented at relatively high levels to nursery diets, provided that Ile requirements are met MH - USA MH - Mexico|Queretaro PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000222906600024 L2 - blood cells;isoleucine;nursery pigs;AMINO-ACID-REQUIREMENTS; GROWING-PIGS; KG PIGS; MEAL; LEUCINE; LYSINE; INTERRELATIONSHIP; AVAILABILITY; METHIONINE; NITROGEN SO - Journal of Animal Science 2004 ;82(8):2397-2404 11271 UI - 4823 AU - Kerr BJ AU - Kidd MT AU - Cuaron JA AU - Bryant KL AU - Parr TM AU - Maxwell CV AU - Campbell JM AD - USDA ARS, MWA, SOMMRU, Natl Swine Res & Informat Ctr, Ames, IA 50011, USAMississippi State Univ, Mississippi State, MS 39762, USAINIFAjP, Ctr Nacl Invest Fisiol & Mejoramiento Anim, Queretaro 76020, MexicoAkey, Lewisburg, OH 45338, USAUniv Illinois, Urbana, IL 61801, USAUniv Arkansas, Fayetteville, AR 72701, USAAPC Inc, Ankeny, IA 50021, USAKerr, BJ, USDA ARS, MWA, SOMMRU, Natl Swine Res & Informat Ctr, NSRIC-2167, Ames, IA 50011 USA TI - Isoleucine requirements and ratios in starting (7 to 11 kg) pigs AB - Two experiments were conducted to refine the Ile needs in 7- to 11-kg pigs. In Exp. 1, 1,680 pigs were fed a 1.25% digestible Lys diet containing 7.5% spray-dried blood cells (as-fed basis) with supplemental crystalline Ile (0.06% increments) to generate seven levels of apparent digestible Ile (0.47 to 0.83%). There were 12 replicates of each treatment with 20 pigs per pen, and treatments were imposed at an initial BW of 7 kg and continued for 16 d. Responses in ADG, ADFI, GY, and plasma urea nitrogen (PUN) were quadratic (P < 0.01) over the 16-d period. Data were fitted to both a single-slope broken line and a quadratic fit, and when the quadratic response curve was superimposed on the broken line, the points at which the quadratic curve first intersected the plateau of the broken line occurred at 0.70, 0.73, 0.66, and 0.65% digestible Ile for ADG, ADFI, GY, and PUN, respectively. Using the ADG and ADFI obtained at this intersection point resulted in an estimate of 9.1 mg of digestible Ile per gram of weight gain. In Exp. 2, 1,840 pigs were fed similarly composed diets, except that digestible Lys was lowered in six diets to 1.10% by decreasing soybean meal. Crystalline Ile was supplemented at 0.09% increments to generate six levels of digestible Ile (0.37 to 0.83%). A seventh diet contained 1.25% digestible Lys by supplementing the 0.83% digestible Ile diet with 0.19% L-Lys.HCl to verify that 1.10% digestible Lys was deficient for these pigs. There were 12 replicates of each treatment with 22 pigs per pen, and treatments imposed at an initial BW of 7 kg and continued for 16 d. Supplementation of Lys to the 0.83% digestible Ile diet (1.10 vs. 1.25% digestible Lys) did not affect ADG (260 vs. 264 g/d, P = 0.60) and ADFI (359 vs. 343 g/d, P = 0.20), whereas GY (725 vs. 774g/kg, P < 0.01) was improved by increasing dietary Lys. Responses in ADG, ADFI, and G:F to the first six diets were quadratic (P < 0.01) over the 16-d period. The points at which the quadratic curve first intersected the plateau of the broken line occurred at 0.686, 0.638, and 0.684% digestible Ile for ADG, ADFI, and GY, respectively. Using the ADG and ADFI obtained at this intersection point results in an estimate of 9.9 mg of digestible Ile per gram of weight gain. These results suggest that although the percent digestible Ile requirement and digestible Ile:Lys ratio for starter (7 to 11 kg) pigs may be higher than 1998 NRC recommendations, the requirement may be lower than current recommendations when taking gain and feed intake into account MH - USA MH - Mexico|Queretaro PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000222906600017 L2 - blood cells;isoleucine;starting pigs;AMINO ACID NEEDS; YOUNG PIG; GROWING PIG; CHROMATOGRAPHY; SWINE; FEED SO - Journal of Animal Science 2004 ;82(8):2333-2342 11272 UI - 4810 AU - Kershenobich D AU - Rodes J AD - UNAM, Hosp Gen Mexico, Fac Med, Dept Expt Med, Mexico City, DF, MexicoHosp Clin 1, Barcelona, SpainKershenobich, D, UNAM, Hosp Gen Mexico, Fac Med, Dept Expt Med, Mexico City, DF, Mexico TI - Luiz Carlos da Costa Gayotto MH - Mexico|Distrito Federal MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Biographical-Item AV - English IS - 1478-3223 UR - ISI:000223032600016 SO - Liver International 2004 ;24(4):394-394 11273 UI - 3857 AU - Kharitonov VL AU - Hinrichsen D AD - CINVESTAV, IPN, Control Automat, Mexico City 07000, DF, MexicoUniv Bremen, Inst Dynam Syst, D-28334 Bremen, GermanyKharitonov, VL, CINVESTAV, IPN, Control Automat, AP 14-740, Mexico City 07000, DF, Mexico TI - Exponential estimates for time delay systems AB - In this paper, we demonstrate how Lyapunov-Krasovskii functionals can be used to obtain exponential bounds for the solutions of time-invariant linear delay systems. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems;Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6911 UR - ISI:000225050800005 L2 - time delay system;exponential estimate;Lyapunov-Krasovskii functional SO - Systems & Control Letters 2004 ;53(5):395-405 11274 UI - 3789 AU - Khrenov BA AU - Alexandrov VV AU - Bugrov DI AU - Garipov GK AU - Kalmykov NN AU - Panasyuk MI AU - Sharakin SA AU - Silaev AA AU - Yashin IV AU - Grebenyuk VM AU - Naumov DV AU - Olshevsky AG AU - Sabirov BM AU - Semenov RN AU - Slunechka M AU - Skryl II AU - Tkatchev LG AU - Saprykin OA AU - Syromyatnikov VS AU - Bitkin VE AU - Eremin SA AU - Matyushkin AI AU - Urmantsev FF AU - Abrashin V AU - Koval V AU - Arakcheev Y AU - Cordero A AU - Martinez O AU - Morena E AU - Robledo C AU - Salazar H AU - Villasenor L AU - Zepeda A AU - Park I AU - Shonsky M AU - Zicha J AD - Joint Inst Nucl Res, Dubna 141980, RussiaRocket Space Corp Energy, Consortium Space Regatta, Korolev, RussiaSpecial Construct Bur Luch, Syzran, RussiaState Res & Prod Space Ctr, Samara, RussiaBenemerita Univ Autonoma Puebla, Puebla, MexicoUniv Michoacana, Morelia 58240, Michoacan, MexicoIPN, Dept Fis, Mexico City, DF, MexicoUWHA Woman Univ, Dept Phys, Seoul, South KoreaNIO KOMPAS, Turnov, Czech RepublicTech Univ, Prague, Czech RepublicKhrenov, BA, Moscow State Pedag Univ, Skobeltsyn Inst Nucl Phys, Vorobevy Gory, Moscow 119992, Russia TI - KLYPVE/TUS space experiments for study of ultrahigh-energy cosmic rays AB - The KLYPVE space experiment has been proposed to study the energy spectrum, composition, and arrival direction of ultrahigh-energy cosmic rays (UHECR) by detecting from satellites the atmosphere fluorescence and scattered Cherenkov light produced by EAS, initiated by UHECR particles. The TUS setup is a prototype KLYPVE instrument. The aim of the TUS experiment is to detect dozens of UHECR events in the energy region of the GZK cutoff, to measure the light background, to test the atmosphere control methods, and to study stability of the optical materials, PMTs, and other instrumental parts in space environment. (C) 2004 MAIK "Nauka/Interperiodica" MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Puebla MH - Russia MH - South Korea PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7788 UR - ISI:000225352100022 L2 - TUS SO - Physics of Atomic Nuclei 2004 ;67(11):2058-2061 11275 UI - 1081 AU - Khripun MK AU - Kiselev AA AU - Efimov AY AU - Mund LA AU - Petranovskii VP AD - St Petersburg State Univ, St Petersburg, RussiaNatl Independent Univ Mexico, Condensed Matter Res Ctr, Encenada, MexicoKhripun, MK, St Petersburg State Univ, St Petersburg, Russia TI - Structral effects on the mutual solubility of solution components and formation of zinc and cadmium chloride complexes in Zn(Cd)(NO3)(2)-LiCl-H2O systems AB - Solubility isotherms have been determined for Zn(Cd)(NO3)(2)-LiCl-H2O systems at 25 degrees C, and Raman spectra in the range of M-Cl and nitrate ion vibrations have been measured. A single bond system is realized over the whole range of concentrations in the Zn(NO3)(2)-LiCl-H2O system because the cybotactic groups are structurally compatible. In the Cd(NO3)(2)-LiCl-H2O system, the cybotactic groups are incompatible, which leads to structural microheterogeneities in post-eutectic concentrations MH - Mexico|Baja California MH - Russia PB - NEW YORK: CONSULTANTS BUREAU/SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4766 UR - ISI:000232077300010 L2 - structure of aqueous solutions;solubility isotherms;multicomponent aqueous solutions of electrolytes;Raman spectroscopy of aqueous solutions SO - Journal of Structural Chemistry 2004 ;45(6):981-987 11276 UI - 3889 AU - Khuong TAV AU - Zepeda G AU - Sanrame CN AU - Dang H AU - Bartberger MD AU - Houk KN AU - Garcia-Garibay MA AD - Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USAIPN, Escuela Nacl Ciencias Biol, Dept Quim Organ, Mexico City 11340, DF, MexicoGarcia-Garibay, MA, Univ Calif Los Angeles, Dept Chem & Biochem, 405 Hilgard Ave, Los Angeles, CA 90095 USA TI - Crankshaft motion in a highly congested bis(triarylmethyl)peroxide AB - Crankshaft motion has been proposed in the solid state for molecular fragments consisting of three or more rotors linked by single bonds, whereby the two terminal rotors are static and the internal rotors experience circular motion. Bis-[tri-(3,5-di-tett-butyl)phenylmethyl]-peroxide 2 was tested as a model in search of crankshaft motion at the molecular level. In the case of peroxide 2, the bulky trityl groups may be viewed as the external static rotors, while the two peroxide oxygens can undergo the sought after internal rotation. Evidence for this process in the case of peroxide 2 was obtained from conformational dynamics determined by variable-temperature C-13 and H-1 NMR between 190 and 375 K in toluene-d(a). Detailed spectral assignments for the interpretation of two coalescence processes were based on a correlation between NMR spectra obtained in solution at low temperature, in the solid state by C-13 CPMAS NMR, and by GIAO calculations based on a B3LYP/6-31G** structure of 2 obtained from its X-ray coordinates as the input. Evidence supporting crankshaft rotation rather than slippage of the trityl groups was obtained from molecular mechanics calculations MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000225083700036 L2 - MOLECULAR MACHINES; STEREOCHEMICAL CONSEQUENCES; CONFORMATIONAL INTERCONVERSION; 2-DIMENSIONAL NMR; DYNAMIC GEARING; CRYSTAL-LATTICE; GYROSCOPES; RELAXATION; COMPASSES; EXCHANGE SO - Journal of the American Chemical Society 2004 ;126(45):14778-14786 11277 UI - 5822 AU - Kiel S AU - Perrilliat MD AD - Free Univ Berlin, Fachrichtung Palaontol, Inst Geol Wissenschaften, D-12249 Berlin, GermanyNatl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoKiel, S, Free Univ Berlin, Fachrichtung Palaontol, Inst Geol Wissenschaften, Malteserstr 74-100, D-12249 Berlin, Germany TI - New gastropods from the maastrichtian of the Mexcala formation in Guerrero, southern Mexico, part III: higher caenogastropoda AB - 24 species of Neomeso- and Neogastropods and two types of isolated larval shells are described from the lower Maastrichtian of the Mexcala Formation in the Mexican state of Guerrero. They are assigned to 14 known genera, twelve of the species are new. Their closest biogeographic relationships exist with the North American Gulf coast, and with western and southern Europe. The new species are Anomalofusus beui, Cancellaria nissenae, Beisselia kilburni, Beisselia kollmanni, Beisselia kirstenae, Surculoma multispiralia, Surculoma minuta, Liopeplum costatum, Lyria? reticulata, Mesorhytis elegans, Ripleyella truncata, and Paleopsephaea? vegaverai MH - Germany MH - Mexico|Distrito Federal PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 3 U4 - Paleontology U5 - J;Article AV - English IS - 0077-7749 UR - ISI:000220562600003 L2 - MOLLUSCA SO - Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 2004 ;231(2):191-217 11278 UI - 3345 AU - Kilbane JJ AU - Le Borgne S AD - Inst Gas Technol, Des Plaines, IL 60018, USA. Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Petroleum biorefining: the selective removal of sulfur, nitrogen, and metals MH - Mexico|Distrito Federal MH - USA T3 - PETROLEUM BIOTECHNOLOGY: DEVELOPMENTS AND PERSPECTIVESStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticle3SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALBBL10 AV - English IS - 0167-2991 UR - ISI:000225982900002 SO - 2004 ;():29-65 11279 UI - 4621 AU - Kim J AU - Zhao HB AU - Panja C AU - Olivas A AU - Koel BE AD - Univ So Calif, Dept Chem, Los Angeles, CA 90089, USAUNAM, CCMC, UNK, Ensenada 22800, Baja California, MexicoKoel, BE, Univ So Calif, Dept Chem, SSC 606, Los Angeles, CA 90089, USA TI - TPD and HREELS reinvestigation of ethylene oxide adsorption on Pt(111) AB - A reinvestigation of ethylene oxide (EtO) adsorption and desorption on Pt(111) is reported using primarily TPD, AES. XPS and HREELS. EtO does not react when adsorbed on Pt(111) at 90 K and then subsequently heated under UHV conditions. Specifically, TPD results and AES measurements taken after TPD experiments place an upper limit on the extent of EtO decomposition at 0.02 ML. This work helps to correct earlier work that showed significant decomposition on this surface. HREELS identified molecular EtO adsorption at 90 K, with only small shifts in molecular vibrational frequencies from condensed phase spectra. At a coverage of less than 0.1-ML EtO, EtO is bonded oxygen-end down to the Pt(111) surface with C-2v symmetry, i.e., with the C-2 axis of EtO normal to the surface. By showing that the close-packed Pt(111) surface is less reactive toward the desired product of ethylene epoxidation than previously thought, these new results should be helpful in discussing differences between the chemistry of Ag and Pt catalysts for this reaction. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000223388100008 L2 - platinum;adsorption kinetics;thermal desorption;thermal desorption spectroscopy;electron energy loss spectroscopy (EELS);alkenes;SN/PT(111) SURFACE ALLOYS; THERMAL-DECOMPOSITION; SELECTIVE OXIDATION; PROPYLENE-OXIDE; AG(110); METHANOL; CU(110); NI(111); OXAMETALLACYCLE; MECHANISM SO - Surface Science 2004 ;564(1-3):53-61 11280 UI - 4032 AU - Kim YA AU - Muramatsu H AU - Hayashi T AU - Endo M AU - Terrones M AU - Dresselhaus MS AD - Shinshu Univ, Fac Engn, Dept Elect & Elect Engn, Nagano 3808553, JapanIPICYT, Dept Adv Mat, San Luis Potosi 78210, MexicoMIT, Cambridge, MA 02139, USAKim, YA, Shinshu Univ, Fac Engn, Dept Elect & Elect Engn, 4-17-1 Wakasato, Nagano 3808553, Japan TI - Thermal stability and structural changes of double-walled carbon nanotubes by heat treatment AB - We describe, for the first time, the sequential structural changes of bundles of double-walled carbon nanotubes (DWNTs) as a function of heat treatment temperature. DWNTs (inner diameters >0.9 nm) are structurally stable up to 2000 degreesC. Above 2100 degreesC, the outer walls of adjacent DWNTs start coalescing into large diameter tubes. At temperatures higher than 2100 degreesC, three different types of structures were observed: (a) large-diameter DWNTs; (b) multi-walled carbon nanotubes (MWNTs), and (c) flaky carbons. The results demonstrate that DWNTs are much more stable than SWNTs, and their stability is comparable to that of MWNTs. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 29 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000224720300016 L2 - SINGLE-WALL; RAMAN-SCATTERING; COALESCENCE; GRAPHITE; GROWTH SO - Chemical Physics Letters 2004 ;398(1-3):87-92 11281 UI - 5413 AU - Kinney-Romero R AU - Giraud-Carrier C AD - Univ Autonoma Metropolitana, Dept Ingn Elect, Mexico City 09950, DF, Mexico. ELCA Informat SA, Lausanne, Switzerland TI - Inducing classification rules from highly-structured data with composition AB - This paper elaborates on two techniques, deconstruction and composition, to handle complex data in order to learn from it. We propose typed higher-order logic as a suitable representation formalism for domains with complex structured data. Both techniques derive naturally from such framework. A naive sequential covering algorithm which uses both techniques is applied on well known learning datasets (simple and structured) to test them with good results. A further experiment on the change of knowledge representation is presented to showcase the robustness of our approach MH - Mexico|Distrito Federal MH - Switzerland T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlerene@xanum.uam.mx cgc@elca.ch0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600027 SO - 2004 ;():262-271 11282 UI - 3026 AU - Kir'yanov AV AU - Il'ichev NN AU - Barmenkov YO AD - Ctr Invest Opt, Leon, MexicoRussian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow 119991, RussiaKir'yanov, AV, Ctr Invest Opt, Loma Bosque 115,Col Lomas Campestre, Leon, Mexico TI - Excited-state absorption as a source of nonlinear thermo-induced lensing and self-Q-switching in an all-fiber Erbium laser AB - A modeling of an all-fiber self-Q-switched Erbium laser is developed, implying that the mechanism of self-Q-switching is the power-dependent thermo-induced lensing in Erbium fiber that stems from the excited-state absorption at the laser wavelength. Experimental dependencies of repetition rate (curve 1) and pulse duration (curve 2) of Erbium fiber laser at CW operation (left from dashed line) and self-Q-switching (right from dashed line) VS pump power (L = 155 cm) MH - Mexico|Guanajuato MH - Russia PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 12 U4 - Instruments & Instrumentation U5 - J;Article AV - English IS - 1612-2011 UR - ISI:000227179900006 L2 - self-Q-switching;excited-state absorption;thermo-induced lensing effect SO - Laser Physics Letters 2004 ;1(4):194-198 11283 UI - 6408 AU - Kirigwi FM AU - van Ginkel M AU - Trethowan R AU - Sears RG AU - Rajaram S AU - Paulsen GM AD - Kansas State Univ, Dept Agron, Manhattan, KS 66506, USACIMMYT, Mexico City 06600, DF, MexicoKirigwi, FM, Kansas State Univ, Dept Agron, Manhattan, KS 66506, USA TI - Evaluation of selection strategies for wheat adaptation across water regimes AB - Drought frequently constrains production of wheat (Triticum aestivum L.), but development of tolerant cultivars is hampered by low heritability for drought tolerance and a lack of effective selection strategies. Our objective was to identify an optimum selection regime for wheat in drought-prone environments. Six-hundred entries derived from 10 crosses were developed by selection under continuous high moisture, alternating high with low moisture, alternating low with high moisture, and continuous low moisture conditions for five generations. The selections were evaluated in two low-yield, a medium-yield, and a high-yield environment in the Yaqui Valley, Sonora, Mexico. The mean performance of entries derived from a particular selection regime was dependant on the stress level of the evaluation environment. Lines developed and selected under continuous high moisture and continuous low-moisture regimes produced the highest mean yields in the low moisture evaluation environment. There was no relationship between continuous selection under either high yielding conditions or low yielding conditions and the mean performance of the resultant lines in their respective high and low yielding evaluation environments. The mean yield of lines selected using the alternating high/low moisture regime as well as the five highest yielding lines were superior in the HY environment, and had similar performance with other regimes under the low yielding evaluation environment. Our results indicate that alternating selection between high and low yielding environments is the most effective way to develop wheat germplasm adapted to environments where intermittent drought occurs MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000188422900013 L2 - drought;selection strategy;stress;wheat;SPRING WHEAT; WINTER-WHEAT; GRAIN-YIELD; EVALUATION ENVIRONMENTS; DROUGHT RESISTANCE; BARLEY; MAIZE; IMPROVEMENT; POPULATIONS; CULTIVARS SO - Euphytica 2004 ;135(3):361-371 11284 UI - 4466 AU - Kiss IZ AU - Hudson JL AU - Escalona J AU - Parmananda P AD - Univ Virginia, Dept Chem Engn, Charlottesville, VA 22903, USAUAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoKiss, IZ, Univ Virginia, Dept Chem Engn, Thornton Hall, Charlottesville, VA 22903 USA TI - Noise-aided synchronization of coupled chaotic electrochemical oscillators AB - We report experimental and numerical results on noise-enhanced synchronization of two coupled chaotic oscillators. Enhanced synchronization is achieved through superimposing small-amplitude Gaussian noise on a common system parameter of the two chaotic oscillators. A resonancelike behavior is found: at an optimum level of noise, maximum synchronization is attained. The simulations show that the resonance behavior occurs with both identical and nonidentical oscillators. Noncommon (asymmetric and independent) noise does not enhance synchronization; common noise seems to enhance synchronization MH - Mexico|Morelos MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000223784600039 L2 - PHASE SYNCHRONIZATION; STOCHASTIC RESONANCE; SYSTEMS SO - Physical Review e 2004 ;70(2): 11285 UI - 5186 AU - Klepetko W AU - Mayer E AU - Sandoval J AU - Trulock EP AU - Vachiery JL AU - Dartevelle P AU - Pepke-Zaba J AU - Jamieson SW AU - Lang I AU - Corris P AD - Univ Hosp Vienna, Dept Cardiothorac Surg, A-1090 Vienna, AustriaJohannes Gutenberg Univ Hosp, Dept Cardiothorac Surg, Mainz, GermanyInst Nacl Cardiol Ignacio Chavez, Cardiothorac Dept, Mexico City, DF, MexicoWashington Univ, Sch Med, Div Pulm & Crit Care Med, St Louis, MO, USAErasme Univ Hosp, Dept Cardiol, B-1070 Brussels, BelgiumHop Marie Lannelongue, Dept Thorac & Vasc Surg, Paris, FrancePapworth Hosp NHS Trust, Dept Resp Med, Cambridge, EnglandUniv Calif San Diego, Med Ctr, Div Cardiovasc & Thorac Surg, San Diego, CA 92103, USAUniv Hosp Vienna, Dept Cardiol, Vienna, AustriaFreeman Rd Hosp, William Leech Ctr Lung Res, Reg Pulm Hypertens Clin, Cambridge, EnglandKlepetko, W, Univ Hosp Vienna, Dept Cardiothorac Surg, Waehringer Guertel 18-20, A-1090 Vienna, Austria TI - Interventional and surgical modalities of treatment for pulmonary arterial hypertension AB - Beyond medical therapy, different interventional and surgical approaches exist for treatment of pulmonary arterial hypertension (PAH). Atrial septostomy has been applied in patients with lack of response to medical therapy in the absence of other surgical treatment options. With growing experience, procedure-related death rates have been reduced to 5.4%, and the most suitable patient group has been identified among patients with a mean right atrial pressure between 10 and 20 mm Hg. Pulmonary endarterectomy is the accepted form of treatment for patients with chronic thromboembolic pulmonary hypertension. Establishing the diagnosis and the classification of the type of lesions by pulmonary angiography is crucial for optimal patient selection. Perioperative mortality rates have been reduced to <10% in experienced centers, and the hemodynamic improvement is dramatic and sustained. Lung and heart-lung transplantation remains the procedure of choice for patients unsuitable for other treatment modalities. Timing of the procedure is difficult because waiting times vary between centers and usually are in a high range. Early referral of patients unresponsive to other treatment forms is therefore of importance to avoid transplantation of patients with established significant comorbidity. The survival rate during the first five years after transplantation for PAH is intermediate among the lung diseases, lower than chronic obstructive pulmonary disease but higher than idiopathic pulmonary fibrosis. (C) 2004 by the American College of Cardiology Foundation MH - Austria MH - Belgium MH - United Kingdom MH - France MH - Germany MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 40 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0735-1097 UR - ISI:000222209300012 L2 - HEART-LUNG TRANSPLANTATION; BALLOON ATRIAL SEPTOSTOMY; PROGNOSTIC FACTORS; EXPERIENCE; SINGLE; THROMBOENDARTERECTOMY; SURVIVAL; ENDARTERECTOMY; GUIDELINES; THERAPY SO - Journal of the American College of Cardiology 2004 ;43(12):73S-80S 11286 UI - 4724 AU - Klessen RS AU - Ballesteros-Paredes J AD - Astrophys Inst Potsdam, D-14482 Potsdam, GermanyUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoKlessen, RS, Astrophys Inst Potsdam, Sternwarte 16, D-14482 Potsdam, Germany TI - Gravoturbulent fragmentation AB - We discuss star formation in the turbulent interstellar medium. We argue that morphological appearance and dynamical evolution of the gas is primarily determined by supersonic turbulence, and that stars form via a process we call gravoturbulent fragmentation. Turbulence that is dominated by large-scale shocks or is free to decay leads to an efficient, clustered and synchronized mode of star formation. On the other hand, when turbulence carries most of its energy on very small scales, star formation is inefficient and biased towards single objects. The fact that Galactic molecular clouds are highly filamentary can be explained by a combination of compressional flows and shear. Some filaments may accumulate sufficient mass and density to become gravitationally unstable and form stars. This is observed in the Taurus molecular cloud. Time scales and spatial distribution of protostars are well explained by the linear theory of gravitational fragmentation of filaments. The dynamical evolution, especially at late times, and the final mass distribution strongly depend on the global properties of the turbulence. In dense embedded clusters mutual protostellar interactions and competition for the available mass reservoir lead to considerable stochastic variations between the mass growth histories of individual stars MH - Germany MH - Mexico|Michoacan PB - MOLETAI: INST THEORETICAL PHYSICS ASTRONOMY RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1392-0049 UR - ISI:000223180000005 L2 - ISM : clouds;ISM : kinematics;stars : formation, turbulence;INITIAL MASS FUNCTION; TURBULENT MOLECULAR CLOUDS; STAR-FORMATION; STELLAR CLUSTERS; GRAVITATIONAL COLLAPSE; DENSITY-FLUCTUATIONS; INTERSTELLAR CLOUDS; TAURUS; SHOCKS; RATES SO - Baltic Astronomy 2004 ;13(3):365-372 11287 UI - 3677 AU - Klimov AB AU - Sainz I AU - Saavedra C AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoConcepcion Univ, Dept Fis, Ctr Quantum Opt & Quantum Informat, Concepcion, ChileKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Effective resonant interactions via a driving field AB - Effective resonant quantum atom-field interactions are studied. These resonant interactions are induced by the presence of an external classical driving field. An adequate choice for frequencies of the driving field produces nonlinear effective Hamiltonians both for atom-field and for spin-spin interactions. It is shown that the exact numerical evolution for each resonance condition is well described by the corresponding effective Hamiltonian MH - Chile MH - Mexico|Jalisco PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000225702000004 L2 - atom-field interactions;driving field;effective Hamiltonians;JAYNES-CUMMINGS MODEL; TRAPPED IONS; STATE; ENTANGLEMENT; COLLAPSE; REVIVAL; SYSTEM SO - Journal of Optics B-Quantum and Semiclassical Optics 2004 ;6(11):448-453 11288 UI - 5724 AU - Klimov AB AU - Sanchez-Soto LL AU - de Guise H AU - Bjork G AD - Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoUniv Complutense, Fac Fis, Dept Opt, E-28040 Madrid, SpainLakehead Univ, Dept Phys, Thunder Bay, ON P7B 5E1, CanadaRoyal Inst Technol, Dept Microelect & Informat Technol, Electrum 229, SE-16440 Kista, SwedenKlimov, AB, Univ Guadalajara, Dept Fis, Revoluc 1500, Guadalajara 44420, Jalisco, Mexico TI - Quantum phases of a qutrit AB - We consider various approaches to treat the phases of a qutrit. Although it is possible to represent qutrits in a convenient geometrical manner by resorting to a generalization of the Poincare sphere, we argue that the appropriate way of dealing with this problem is through phase operators associated with the algebra su(3). The rather unusual properties of these phases are caused by the small dimension of the system and are explored in detail. We also examine the positive operator-valued measures that can describe the qutrit phase properties MH - Canada MH - Mexico|Jalisco MH - Spain MH - Sweden PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000220855000013 L2 - RELATIVE PHASE; MIXED STATES; OBSERVABLES; COMPUTATION; DIFFERENCE; OPERATORS SO - Journal of Physics A-Mathematical and General 2004 ;37(13):4097-4106 11289 UI - 6385 AU - Klimov AB AU - Romero JL AU - Delgado J AU - Sanchez-Soto LL AD - Univ Complutense, Fac Fis, Dept Opt, E-28040 Madrid, SpainUniv Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, MexicoSanchez-Soto, LL, Univ Complutense, Fac Fis, Dept Opt, E-28040 Madrid, Spain TI - Effective damping in the Raman cooling of trapped ions AB - We present a method of treating the interaction of a single three-level ion with two laser beams. The idea is to apply a unitary transformation such that the exact transformed Hamiltonian has one of the three levels decoupled for all values of the detunings. When one takes into account damping, the evolution of the system is governed by a master equation usually obtained via adiabatic approximation under the assumption of far-detuned lasers. To go around the drawbacks of this technique, we use the same unitary transformation to get an effective master equation. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Jalisco MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000188298000022 L2 - coding and trapping;decoherence;Raman transitions;NONCLASSICAL MOTIONAL STATES; LASER-COOLED IONS; QUANTUM-STATE; 3-LEVEL ATOM; EFFECTIVE-HAMILTONIANS; MASTER-EQUATIONS; SQUEEZED STATES; SINGLE-ION; DYNAMICS; GENERATION SO - Optics Communications 2004 ;230(4-6):393-400 11290 UI - 2910 AU - Klimova EI AU - Lopez EAV AU - Klimova T AU - Garcia MM AU - Meleshonkova NN AU - Ramirez LR AD - Natl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Moscow, RussiaKlimova, EI, Natl Autonomous Univ Mexico, Inst Chem, Mexico City 04510, DF, Mexico TI - Reaction of monocyclic ferrocenyl-4,5-dihydropyrazoles with beta-dicarbonyl compounds AB - Monocyclic 3- and 5-ferrocenyl-4,5-dihydropyrazoles with a free NH group in the molecule react with acetylacetone to form the corresponding enaminocarbonyl compounds. The latter were isolated as a single isomer, presumably E. 3-Ferrocenyidihydropyrazoles and 5- ferrocenyl-3-(p-methoxyphenyl)-4,5-dihydropyrazole analogously react with acetoacetic ester. 5-Ferrocenyl-3-phenyl-, 3-(p-bromophenyl)-5-ferrocenyl, and 3,5-diferrocenyl-4,5-dihydropyrazoles react with acetoacetic ester to form acetoacetylpyrazol ides MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1070-3632 UR - ISI:000227367200002 L2 - FERROCENE; PYRAZOLINES; DERIVATIVES SO - Russian Journal of General Chemistry 2004 ;74(12):1830-1835 11291 UI - 5636 AU - Klimova EI AU - Klimova T AU - Stivalet JMM AU - Toledano CA AU - Toscano RA AU - Ortega SH AU - Ramirez LR AU - Bakinovsky LV AU - Garcia MM AD - Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRussian Acad Sci, ND Zelinskii Organ Chem Inst, Moscow 117913, RussiaKlimova, T, Univ Nacl Autonoma Mexico, Fac Quim, Cd Univ,Coyoacan, Mexico City 04510, DF, Mexico TI - Synthesis and some chemical transformations of (Z)- and (E)-2-acetyl-1-ferrocenyl-3-methylbuta-1,3-dienes - A new type of cationic cycloaddition AB - Dehydration of (E)- and (Z)-2-acetyl-1-ferrocenyl-3-methyl-but-1-en-3-ols gave the corresponding (E)- and (Z)-2-acetyl-1-ferrocenyl-3-methylbuta-1,3-dienes, which have a cross-conjugated system of three double bonds. These heterotrienes readily afford the products of linear and cyclodimerization by following a cationic cyclodimerization mechanism; they also form Diels-Alder adducts with azodicarboxylic and maleic acid N-phenylimides. The spatial structures of (E)-2-acetyl-1-ferrocenyl-3-methylbuta-1,3-diene, (E,E)-1,5-diferrocenyl-2-isopropenyl-6-isopropylidene-3-methyl-1,3-octad iene-7-one, and 7-ferrocenyl-4-(ferrocenylmethylidene)-8-isopropylidene-1,3,5-trimethyl- 9-oxabicyclo[3.3.1]non-2-ene were elucidated by X-ray diffraction analyses of single crystals. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) MH - Mexico|Distrito Federal MH - Russia PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000221027500008 L2 - cycloaddition;cyclodimerization;dimerization;ferrocene;STABLE CARBOCATIONS; ACTIVE COMPOUNDS; ALLYL CATIONS; CYCLODIMERIZATION; FERROCENYL; DIMERIZATION; PROTONATION; BEHAVIOR; ACID SO - European Journal of Organic Chemistry 2004 ;(8):1714-1723 11292 UI - 5952 AU - Kluzniak W AU - Abramowicz MA AU - Kato S AU - Lee WH AU - Stergioulas N AD - Zielona Gora Univ, Inst Astron, PL-65265 Zielona Gora, PolandUPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 04, FranceCopernicus Astron Ctr, PL-00716 Warsaw, PolandChalmers Univ, Dept Astrophys, S-41296 Gothenburg, SwedenNara Sangyo Univ, Dept Informat, Nara 6368503, JapanUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoAristotle Univ Thessaloniki, Dept Phys, Thessaloniki 54124, GreeceKluzniak, W, Zielona Gora Univ, Inst Astron, Ul Lubuska 2, PL-65265 Zielona Gora, Poland TI - Nonlinear resonance in the accretion disk of a millisecond pulsar AB - Two simultaneous frequencies of quasi-periodic millisecond modulation of the X-ray flux (twin kilohertz quasi-periodic oscillations) have recently been detected in an accreting 2.5 ms X-ray pulsar. Their difference, equal to about 1/2 of the neutron star spin rate, clearly indicates that resonant oscillations of the accretion disk have been observed. Similar nonlinear resonances may be spontaneously excited in the accretion disk in the absence of a pulsar, e.g., in black holes. We identify modes of disk oscillations whose frequencies are in agreement with the two observed ones when the rotating neutron star is modeled with realistic equations of state MH - France MH - Greece MH - Japan MH - Mexico|Distrito Federal MH - Poland MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 38 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000220300800007 L2 - stars : neutron;X-rays : general;QUASI-PERIODIC OSCILLATIONS; X-RAY BINARIES; BLACK-HOLE; NEUTRON-STARS; RELATIVISTIC DISKOSEISMOLOGY; GRO J1655-40; DWARF SO - Astrophysical Journal 2004 ;603(2):L89-L92 11293 UI - 4735 AU - Kobal SL AU - Lee SS AU - Willner R AU - Vargas FEA AU - Luo HA AU - Watanabe C AU - Neuman Y AU - Miyamoto T AU - Siegel RJ AD - Cedars Sinai Med Ctr, Cardiac Noninvas Lab, Los Angeles, CA 90048, USACedars Sinai Med Ctr, Div Cardiol, Los Angeles, CA 90048, USARancho Los Amigos Natl Rehabil Ctr, Downey, CA, USANW Natl Med Ctr, Peidat Cardiol Dept, Mexico City, DF, MexicoSiegel, RJ, Cedars Sinai Med Ctr, Cardiac Noninvas Lab, Room 5335, Los Angeles, CA 90048 USA TI - Hand-carried cardiac ultrasound enhances healthcare delivery in developing countries AB - The availability of cardiac ultrasound is limited in developing countries. We evaluated the feasibility and diagnostic capability of a hand-carried cardiac ultrasound device in 126 patients (age 44 24 years) referred for consultation to a cardiology clinic in rural Mexico. The hand-carried cardiac ultrasound device identified 86 cardiac findings and obviated the need for further. comprehensive echocardiographic evaluation in 90% of patients (113 of 126). (C) 2004 by Excerpta Medica, Inc MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 3 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000223287600031 SO - American Journal of Cardiology 2004 ;94(4):539-541 11294 UI - 5658 AU - Koch FHJ AU - Quiroz-Mercado H AU - Hattenbach LO AU - Guerrero-Naranjo JL AU - Yesurun I AU - Augustin A AU - Luloh KP AU - Ohrloff C AD - Univ Frankfurt Klinikum, Klin Augenheilkunde, DE-60590 Frankfurt, GermanyStadt Kliniken, Karlsruhe, GermanyAsociac Evitar Ceguera Mexico, Mexico City, DF, MexicoInsight Instruments Inc, Sanford, FL, USAKoch, FHJ, Univ Frankfurt Klinikum, Klin Augenheilkunde, Theodor Stern Kai 7, DE-60590 Frankfurt, Germany TI - Pigment epithelium endoscopic laser surgery for treatment of choroidal neovascularization AB - Purpose: To present a new concept and technique for subretinal surgery. Methods: Twenty-four eyes of 24 patients with subfoveal choroidal neovascularization (CNV) were included in this study. Nine patients were operated on in Mexico City by one surgeon, 15 patients in Frankfurt by another surgeon. The retina at the posterior pole was detached and subretinal thermal photocoagulation of the CNVs was performed using a 20/19-gauge GRIN rod laser endoscope ( Insight Instruments Inc., Sanford, Fla., USA). This procedure was termed PEELS ( pigment epithelium endoscopic laser surgery). Results: In 7 patients ( Mexico), moderate improvement or stabilization of vision over 6 months or longer was achieved. In 10 out of 12 patients ( Frankfurt), stabilization of vision over a follow-up period of 6 - 18 months was achieved, at least. Serious complications were not observed. Four of the Frankfurt series patients improved their vision. Conclusion: PEELS can stabilize or improve vision. Copyright (C) 2004 S. Karger AG, Basel MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Article AV - English IS - 0030-3755 UR - ISI:000220974300002 L2 - age-related macular degeneration;choroidal neovascularization;endoscopy;laser coagulation;retinal pigment epithelium;subretinal surgery;MACULAR DEGENERATION; SURGICAL-MANAGEMENT; TRANSLOCATION; MEMBRANES; THERAPY; GROWTH SO - Ophthalmologica 2004 ;218(3):162-175 11295 UI - 4282 AU - Koch W AU - Frey B AU - Ruiz JFS AU - Scior T AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 09230, DF, MexicoUniv Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, GermanyBenemerita Univ Autonoma Puelba, Fac Ciencias Quim & Farm, Puebla 72570, MexicoKoch, W, Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Av Guelatao 66,Col Ejercito Oriente, Mexico City 09230, DF, Mexico TI - On the restricted and combined use of Rudenberg's approximations in crystal orbital theories of Hartree-Fock type AB - The analysis based on Rudenberg's well-known letter of 1951, which has been outlined for molecules in a preceding contribution, has now been transfered to translational periodic systems in one, two, or three dimensions. Entitled "On the Three- and Four-Center Integrals in Molecular Quantum Mechanics", this letter explicitly presents two approximations only for four-center repulsion integrals. When applied to some types of three-center repulsion integrals, however, these two recipes still imply considerable oversimplifications. Using both one-electron and two-electron routes of Rudenberg's expansion, such shortcomings can be avoided strictly. Starting from a simple "Unrestricted and Combined" (U&C) approximation scheme introduced elsewhere, an improved "Restricted and Combined" (R&C) approximation picture for Fock-matrix elements now will be outlined, which does not tolerate any unnecessary oversimplifications. Although the simplicity of the U&C scheme is lost in this case, R&C-approximated Fock-matrix elements still can be constructed from one- and two-center integrals alone in an effective way. Moreover, due to their dependence on a single geometric parameter, all types of two-center integrals can be calculated in advance for about one hundred fixed interatomic distances at the desired level of sophistication, and stored once and for ali. A cubic spline algorithm may be taken to interpolate the actual integral value from each precomputed list MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Multidisciplinary U5 - J;Article AV - English IS - 0932-0784 UR - ISI:000224098900007 L2 - unrestricted (and restricted) Hartree-Fock crystal orbitals;integral approximations according to Rudenberg;extended Huckel theory (EHT);ONE-DIMENSIONAL CONDUCTORS; EXTENDED HUCKEL CALCULATIONS; DIATOMIC DIFFERENTIAL OVERLAP; ENERGY-BAND STRUCTURES; INTEGRAL APPROXIMATIONS; KIND; GEOMETRIES; PROJECTION; EQUATIONS; EXPANSION SO - Zeitschrift fur Naturforschung Section A-A Journal of Physical Sciences 2004 ;59(9):568-590 11296 UI - 5669 AU - Kochekseraii SB AU - Robinson M AD - ITESM, Dept Mech Engn & Mech, Mexico City 52926, DF, MexicoUniv Manchester, Inst Technol, Dept Mech Engn, Manchester, Lancs, EnglandKochekseraii, SB, ITESM, Dept Mech Engn & Mech, Campus Estado Mexico,Atizapan Zaragoza, Mexico City 52926, DF, Mexico TI - Flexural behaviour of a polyvinyl chloride-lined glass-reinforced plastic composite multi-mitred pipe bend subjected to combined loads: a comparative finite element analysis and experimental case study AB - The flexural behaviour of a glass-reinforced plastic (GRP) multi-mitred pipe bend (MMPB) subjected to combined in-plane bending and internal pressure is presented in this paper. After construction of a polyvinyl chloride (PVC)-lined GRP MMPB, its behaviour subjected to in-plane bending, internal pressure and combined internal pressure and in-plane bending was studied. Small-and large-displacement laminated shell finite element analysis (FEA) results using ABAQUS FE were compared with experiments on an identical specimen. When modelling an MMPB subject to individually applied pressure and bending loads, comparisons exhibited good agreement between linear small-displacement FEA with experimental data. Only large-displacement FEA agreed with experiments when modelling MMPBs subject to combined pressure and bending loads. Large-displacement FEA showed geometrically non-linear behaviour closely matching the experimental trends MH - United Kingdom MH - Mexico|Distrito Federal PB - BURY ST EDMUNDS: PROFESSIONAL ENGINEERING PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Mechanics;Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0309-3247 UR - ISI:000220983900002 L2 - composites;pipe bends;non-linear finite element analysis;ABAQUS SO - Journal of Strain Analysis for Engineering Design 2004 ;39(2):137-146 11297 UI - 76 AU - Koepke R AU - Warner M AU - Petreas M AU - Cabria A AU - Danis R AU - Hernandez-Avila M AU - Eskenazi B AD - Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720, USACalif Dept Tox Subst Control, Hazardous Mat Lab, Berkeley, CA, USAInt Womens Hlth Coalit, New York, NY, USANatl Inst Publ Hlth, Ctr Invest Populat Hlth, Cuernavaca, Morelos, MexicoEskenazi, B, Univ Calif Berkeley, Sch Publ Hlth, 140 Warren Hall, Berkeley, CA 94720 USA TI - Serum DDT and DDE levels in pregnant women of chiapas, Mexico AB - The authors measured the main ingredients of technical DDT (1,1,1-trichloro-2,2-bis(p-chlorophenyl [p,p'-DDT]) and its principal metabolite, 1,1-dichloro-2,2-bis (p-chlorophenyl)ethylene [p,p'-DDE]) in serum collected from 52 pregnant women in Tapachula, Chiapas, Mexico in 1998. The median lipid-adjusted serum levels for the women were 676 ng/g p,p'-DDT (range: 56-23,169 ng/g) and 4,843 ng/g p,p'-DDE (range: 113-41,964 ng/g). In regression analysis, serum DDT and DDE increased with age (test for trend, p = .022) but decreased with total lactation (test for trend, p < .001). Residence in a house that had ever been sprayed for malaria control was also related to serum DDT and DDE. This study provides evidence of high-level exposure to DDT and DDE among pregnant women living in Chiapas, Mexico, despite countrywide restrictions on its use at the time MH - USA MH - Mexico|Morelos PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000236334700004 L2 - DDT;DDE;dichlorodiphenyltricliloroethane;dichlorodiphenyldichloroethylene;exposure assessment;pregnant women;serum;ORGANOCHLORINE PESTICIDE LEVELS; FATTY-ACID CONJUGATE; MATERNAL BLOOD-SERUM; ADIPOSE-TISSUE; BREAST-CANCER; SPONTANEOUS-ABORTION; RECEPTOR VARIABLES; MALARIA CONTROL; PUBLIC-HEALTH; EXPOSURE SO - Archives of Environmental Health 2004 ;59(11):559-565 11298 UI - 2412 AU - Kofman-Alfaro S AU - Penchaszadeh VB AD - Columbia Univ, Mailman Sch Publ Hlth, New York, NY 10032, USAUniv Nacl Autonoma Mexico, Fac Med, Gen Hosp Mexico, Dept Genet, Mexico City 04510, DF, MexicoKofman-Alfaro, S, Columbia Univ, Mailman Sch Publ Hlth, 722 W 168th St,Room 1613, New York, NY 10032 USA TI - Community genetic services in Latin America and regional network of medical genetics - Recommendations of a World Health Organization Consultation AB - The World Health Organization sponsored a Consultation on Community Genetic Services and a Regional Network of Medical Genetics in Latin America in Porto Alegre, Brazil, on June 19, 2003. The main recommendations of the meeting included: (a) the call for government funding of services, research and education in medical genetics; (b) the conduct of epidemiological research on the prevalence and types of birth defects, genetic disorders and genetic predispositions to common diseases; (c) the education of health professionals in genetics; (d) the education of genetic professionals in community health and public health genetics; (e) the fostering of interactions between clinical geneticists, public health personnel, primary health care workers and community organizations, and (f) a better planning of regionalized services to avoid duplication and inefficiency. Copyright © 2004 S. Karger AG, Basel MH - Mexico|Distrito Federal MH - USA PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1422-2795 UR - ISI:000228872900018 L2 - community genetic services;genetic services;Latin America;medical genetics;regional network;World Health Organization SO - Community Genetics 2004 ;7(2-3):157-159 11299 UI - 4610 AU - Kokubugata G AU - Vovides AP AU - Kondo K AD - Natl Sci Museum, Tsukuba Bot Garden, Tokyo, Ibaraki 3050005, JapanInst Ecol, AC, Xalapa 91000, Veracruz, MexicoHiroshima Univ, Lab Plant Chromosome & Gene Stock, Higashihiroshima 7398526, JapanKokubugata, G, Natl Sci Museum, Tsukuba Bot Garden, Tokyo, Ibaraki 3050005, Japan TI - Mapping 5S ribosomal DNA on somatic chromosomes of four species of Ceratozamia and Stangeria eriopus (Cycadales) AB - Somatic chromosomes of four species of Ceratozamia, C. hildae, C. kuesteriana, C. mexicana and C. norstogii, and Stangeria eriopus, were observed and compared by the fluorescence in situ hybridization method using 5S ribosomal (rDNA) probes. The four Ceratozamia species and S. eriopus showed the same chromosome number of 2n = 16, and had similar karyotypes, comprising 12 metacentric (m), two submetacentric (sm) chromosomes and two telocentric (t) chromosomes. The four Ceratozamia species exhibited a proximal 5S rDNA site in the interstitial region of two m chromosomes. Stangeria eriopus exhibited a distal 5S rDNA site in the interstitial region of two m chromosomes, which probably indicates that the two genera differ in chromosome structure by at least one paracentric inversion. (C) 2004 The Linnean Society of London MH - Japan MH - Mexico|Veracruz PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000223447000009 L2 - cycads;cytotaxonomy;fluorescence in situ hybridization;IN-SITU HYBRIDIZATION; MEXICAN ZAMIACEAE; KARYOTYPE; RDNA; VERACRUZ; NUMBERS; CHIAPAS SO - Botanical Journal of the Linnean Society 2004 ;145(4):499-504 11300 UI - 5499 AU - Kolata JJ AU - Aguilera EF AU - Becchetti FD AU - Chen Y AU - DeYoung PA AU - Garcia-Martinez H AU - Hinnefeld JD AU - Lupton JH AU - Martinez-Quiroz E AU - Peaslee G AD - Univ Notre Dame, Dept Phys, Notre Dame, IN 46556, USAInst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Michigan, Dept Phys, Ann Arbor, MI 48109, USAHope Coll, Dept Phys, Holland, MI 49422, USAIndiana Univ, Dept Phys, South Bend, IN 46634, USAHope Coll, Dept Chem, Holland, MI 49422, USAKolata, JJ, Univ Notre Dame, Dept Phys, Notre Dame, IN 46556, USA TI - Elastic scattering of Be-10 on Pb-208 near the Coulomb barrier AB - The elastic scattering of Be-10 on Pb-208 has been measured over a range of energies near the nominal Coulomb barrier. An excitation function for the total reaction cross section is obtained from the elastic-scattering angular distributions and compared with existing fusion data. Comparisons are also made with existing fusion, transfer/breakup, and elastic data for Be-9 incident on Bi-209. A strong enhancement in the sub-barrier total reaction cross section for Be-9+Bi-209 relative to Be-10+Pb-208 is demonstrated MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000221427500063 L2 - NUCLEAR-REACTIONS; FUSION; CHANNELS; BREAKUP; SYSTEM SO - Physical Review C 2004 ;69(4): 11301 UI - 6588 AU - Komar C AU - Turnbull JF AU - Roque A AU - Fajer E AU - Duncan NJ AD - CIAD AC, Unidad Mazatlan, Sinaloa 82000, MexicoUniv Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandDuncan, NJ, CIAD AC, Unidad Mazatlan, AP 711, Sinaloa 82000, Mexico TI - Effect of water treatment and aeration on the percentage hatch of demersal, adhesive eggs of the bullseye puffer (Sphoeroides annulatus) AB - The bullseye puffer (Sphoeroides annulatus) is a species with potential for aquaculture. However, preliminary studies on the biology and reproduction of the species in captivity have failed to produce consistent success at hatching. In this study, the effect of aeration and water treatment (filtration and ultraviolet (UV) sterilisation) on percentage hatch was assessed in a replicated experiment repeated on two occasions. Four treatments were used, filtered water (5 gm) treated with UV, in an aerated system (AT) and a static system (ST); water that had been coarse-filtered (20 gm) and not exposed to UV kept in aerated system (ANT) and a static system (SNT). The percentage hatch was ranked 87.5+/-5.0>80.6+/-9.4>77.2+/-12.8>62.8+/-10.4 (mean of all replicates from both experiments +/- S.D.) for the respective treatments AT>ST>ANT>SNT. However, percentage hatch for AT was only significantly (P<0.05) higher than ANT and SNT, while hatch for ST was only significantly higher (P<0.05) than SNT. A GLM analysis showed the use of treated water (filtered and UV treated) in the incubators and aeration had a significant positive effect on percentage hatch. These effects were additive with no significant positive or negative interaction. There was no significant differences in bacterial counts among treatments (AT, ANT, ST, SNT), but significant differences (P<0.05) were observed among days. There was no significant interaction between days and treatments to affect bacterial counts. There was no correlation between bacterial counts and percentage hatch. The water treatments significantly improved percentage hatch, but did not affect bacterial counts. This paper reports an incubation system that consistently resulted in more than 80% successful hatching for bullseye puffer eggs. These results should help to improve the hatching success of this species and possibly others with demersal adhesive eggs. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Sinaloa MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000187739300013 L2 - puffer fish;Sphoeroides annulatus;egg incubation;hatching;CANTHIGASTER-VALENTINI PISCES; BACTERIAL-FLORA; OVARIAN MATURATION; TAKIFUGU NIPHOBLES; RAINBOW-TROUT; REEF FISHES; WHITE BASS; LARVAE; TETRAODONTIDAE; INCUBATION SO - Aquaculture 2004 ;229(1-4):147-158 11302 UI - 6531 AU - Kopperman RD AU - Wilson RG AD - CUNY City Coll, Dept Math, New York, NY 10031, USAUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoKopperman, RD, CUNY City Coll, Dept Math, New York, NY 10031, USA TI - On the role of finite, hereditarily normal spaces and maps in the genesis of compact Hausdorff spaces AB - We consider how properties of the bonding maps of the inverse spectrum determine properties of the inverse limit. Specifically, we study the limits of inverse spectra of finite To-spaces with bonding maps which are either chaining or normalizing. We will show that if the bonding maps are normalizing, then the inverse limit is a normal T-0-space, and therefore, its Hausdorff reflection is its subset of specialization minimal elements. If the maps are chaining, then the inverse limit is a completely normal spectral space; such spaces have been studied since they include the real spectra of commutative rings [C.N. Delzell, J.J. Madden, J. Algebra 169 (1994) 71], and the prime spectrum of a ring of functions, Spec(C(X)). The existence and importance of this class of non-Hausdorff, normal topological spaces was extremely surprising to us. Further, each of these results is reversible; if the inverse limit is normal, then each space in the spectrum is preceded by one whose bonding map to it is normalizing. By way of contrast, the inverse limit of finite T-0-spaces with separating bonding maps need not be a normal topological space (Example 3.8(a)) and furthermore, if the spaces of the inverse spectrum are normal, then the Hausdorff reflection of the limit must be zero-dimensional (Theorem 3.15). (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000187756900020 L2 - specialization order;Hausdorff reflection;separating map;normalizing map;chaining map;normal T-0-space;completely normal spectral space;prime spectrum of C(X);real spectrum;COMMUTATIVE RINGS; PRIME IDEAL SO - Topology and Its Applications 2004 ;135(1-3):265-275 11303 UI - 5070 AU - Kordas K AU - Lopez P AU - Rosado JL AU - Alatorre J AU - Ronquillo D AU - Stoltzfus RJ AD - Cornell Univ, Div Nutr Sci, Ithaca, NY 14853, USAINCMN, Mexico City, DF, MexicoUniv Queretaro, Queretaro, MexicoUNAM, Mexico City, DF, Mexico TI - Long-term effects of iron and zinc supplementation on cognition of lead exposed Mexican children MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602326 SO - Faseb Journal 2004 ;18(4):A483-A483 11304 UI - 6331 AU - Kordas K AU - Lopez P AU - Rosado JL AU - Vargas GG AU - Rico JA AU - Ronquillo D AU - Cebrian ME AU - Stoltzfus RJ AD - Cornell Univ, Div Nutr Sci, Ithaca, NY 14853, USANatl Inst Med Sci & Nutr, Dept Nutr Physiol, Mexico City, DF, MexicoUniv Queretaro, Sch Nat Sci, Queretaro, MexicoUniv Juarez Durango, Sch Med, Gomez Palacio, MexicoNatl Autonomous Univ Mexico, Dept Psychol, Mexico City, DF, MexicoCINVESTAV, Natl Polytech Inst, Dept Toxicol, Mexico City, DF, MexicoKordas, K, Cornell Univ, Div Nutr Sci, Ithaca, NY 14853, USA TI - Blood lead, anemia, and short stature are independently associated with cognitive performance in Mexican school children AB - Lead exposure and nutritional factors are both associated with cognitive performance. Lead toxicity and nutritional status are also associated with each other. We examined whether nutritional status variables account for part or all of the association between cognitive performance and lead exposure. First-grade children (n = 724) ages 6-8 y, attending Mexican public schools located in the vicinity of a metal foundry were asked to participate and 602 enrolled in the study. Blood lead, iron status, anemia, anthropometry, and cognitive function were assessed. Results from 7 standardized tests are presented here. The mean blood lead concentration was 11.5 +/- 6.1 mug/dL (0.56 +/- 0.30 mumol/L) and 50% of the children had concentrations >10 mug/dL (0.48 mumol/L). The prevalence of mild anemia (<124 g/L) was low (10%) and stunting (<2 SD) was nonexistent (2.3%). In bivariate analyses, lead was negatively associated with 4 cognitive tests and was also inversely correlated with iron status, height-for-age Z scores, and head circumference. In multivariate models, the association between lead and cognitive performance was not strongly affected by nutritional variables, suggesting that the relation of lead to cognition is not explained by lead's relation to iron deficiency anemia or growth retardation. In multivariate models, hemoglobin concentration was also positively associated with Peabody Picture Vocabulary Test and Number Sequencing performance, whereas serum ferritin was negatively related to the Coding subscale of the Wechsler Intelligence Scales for Children-Revised Mexican Version (WISC-RM) MH - Mexico|Distrito Federal MH - Mexico|Durango MH - Mexico|Queretaro MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 14 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000188708100011 L2 - iron;anemia;growth;lead exposure;cognitive performance;IRON-DEFICIENCY; SIGNAL-TRANSDUCTION; PRESCHOOL-CHILDREN; LATE CHILDHOOD; AGED CHILDREN; EXPOSURE; LEVEL; SUPPLEMENTATION; INTELLIGENCE; GROWTH SO - Journal of Nutrition 2004 ;134(2):363-371 11305 UI - 4956 AU - Koribalski BS AU - Staveley-Smith L AU - Kilborn VA AU - Ryder SD AU - Kraan-Korteweg RC AU - Ryan-Webber EV AU - Ekers RD AU - Jerjen H AU - Henning PA AU - Putman ME AU - Zwaan MA AU - de Blok WJG AU - Calabretta MR AU - Disney MJ AU - Minchin RF AU - Bhathal R AU - Boyce PJ AU - Drinkwater MJ AU - Freeman KC AU - Gibson BK AU - Green AJ AU - Haynes RF AU - Juraszek S AU - Kesteven MJ AU - Knezek PM AU - Mader S AU - Marquarding M AU - Meyer M AU - Mould JR AU - Oosterloo T AU - O'Brien J AU - Price RM AU - Sadler EM AU - Schroder A AU - Stewart IM AU - Stootman F AU - Waugh M AU - Warren BE AU - Webster RL AU - Wright AE AD - CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, AustraliaSwinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, AustraliaAnglo Australian Observ, Epping, NSW 1710, AustraliaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoUniv Melbourne, Sch Phys, Parkville, Vic 3010, AustraliaMt Stromlo & Siding Spring Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, AustraliaUniv New Mexico, Inst Astrophys, Albuquerque, NM 87131, USAUniv Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USAEuropean So Observ, D-85748 Garching, GermanyCardiff Univ, Cardiff Sch Phys & Astron, Cardiff CF24 3YB, S Glam, WalesUniv Western Sydney Macarthur, Dept Phys, Campbelltown, NSW 2560, AustraliaUniv Queensland, Dept Phys, St Lucia, Qld 4072, AustraliaUniv Sydney, Sch Phys, Sydney, NSW 2006, AustraliaWIYN Inc, Tucson, AZ 85726, USANatl Opt Astron Observ, Tucson, AZ 85726, USAASTRON, NL-7990 AA Dwingeloo, NetherlandsUniv Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, EnglandKoribalski, BS, CSIRO, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia TI - The 1000 brightest HIPASS galaxies: HI properties AB - We present the HIPASS Bright Galaxy Catalog (BGC), which contains the 1000 H I brightest galaxies in the southern sky as obtained from the H i Parkes All-Sky Survey ( HIPASS). The selection of the brightest sources is based on their H I peak flux density (S-peak greater than or similar to116 mJy) as measured from the spatially integrated HIPASS spectrum. The derived H I masses range from similar to10(7) to 4 x 10(10) M-.. While the BGC ( z< 0.03) is complete in S-peak, only a subset of &SIM;500 sources can be considered complete in integrated H I flux density (F-H I &GSIM;25 Jy km s(-1)). The HIPASS BGC contains a total of 158 new redshifts. These belong to 91 new sources for which no optical or infrared counterparts have previously been cataloged, an additional 51 galaxies for which no redshifts were previously known, and 16 galaxies for which the cataloged optical velocities disagree. Of the 91 newly cataloged BGC sources, only four are definite H I clouds: while three are likely Magellanic debris with velocities around 400 km s(-1), one is a tidal cloud associated with the NGC 2442 galaxy group. The remaining 87 new BGC sources, the majority of which lie in the zone of avoidance, appear to be galaxies. We identified optical counterparts to all but one of the 30 new galaxies at Galactic latitudes \b\ > 10degrees. Therefore, the BGC yields no evidence for a population of "free-floating'' intergalactic H I clouds without associated optical counterparts. HIPASS provides a clear view of the local large-scale structure. The dominant features in the sky distribution of the BGC are the Supergalactic Plane and the Local Void. In addition, one can clearly see the Centaurus Wall, which connects via the Hydra and Antlia Clusters to the Puppis Filament. Some previously hardly noticable galaxy groups stand out quite distinctly in the H I sky distribution. Several new structures, including some not behind the Milky Way, are seen for the first time MH - Australia MH - United Kingdom MH - Germany MH - Mexico|Guanajuato MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 52 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-6256 UR - ISI:000222702800002 L2 - galaxies : distances and redshifts;galaxies : fundamental parameters;galaxies : kinematics and dynamics;intergalactic medium;radio emission lines;surveys;SURFACE BRIGHTNESS GALAXIES; DWARF IRREGULAR GALAXY; TULLY-FISHER RELATION; ALL-SKY-SURVEY; EXTRAGALACTIC DISTANCE SCALE; SOUTHERN SPIRAL GALAXIES; HUBBLE-SPACE-TELESCOPE; HIGH-VELOCITY CLOUDS; LY-ALPHA FOREST; I MASS FUNCTION SO - Astronomical Journal 2004 ;128(1):16-46 11306 UI - 7358 AU - Korvin G AU - Oleschko K AD - King Fahd Univ Petr & Minerals, Dhahran 31261, Saudi ArabiaUNAM, Inst Geol, Mexico City 04510, DF, MexicoKorvin, G, King Fahd Univ Petr & Minerals, Dhahran 31261, Saudi Arabia TI - Multiple wave scattering from fractal aggregates AB - Multiple scattered waves from fractal aggregates create spurious resonances in the high-frequency part of the wavefield's Fourier spectrum. It is shown by a probabilistic convolutional model that for extended fractal media with strong scattering cross-section, multiple scattering can affect the value of the fractal dimension estimated from the wave-field's Fourier power spectrum. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Saudi Arabia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000185577400017 L2 - DELESSE PRINCIPLE; SOILS; GEOMETRY; SYSTEMS; SETS SO - Chaos Solitons & Fractals 2004 ;19(2):421-425 11307 UI - 4832 AU - Kosevich YA AU - Khomeriki R AU - Ruffo S AD - Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi, SLP, MexicoTbilisi State Univ, Dept Phys, GE-380028 Tbilisi, Rep of GeorgiaUniv Florence, Dipartimento Energet Sergio Stecco, I-50139 Florence, ItalyUniv Florence, CSDC, I-50139 Florence, ItalyINFM, Florence, ItalyIst Nazl Fis Nucl, I-50125 Florence, ItalyKosevich, YA, Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, Alvaro Obregon 64, San Luis Potosi, SLP, Mexico TI - Supersonic discrete kink-solitons and sinusoidal patterns with "magic" wave number in anharmonic lattices AB - The sharp-pulse method is applied to Fermi-Pasta-Ulam (FPU) and Lennard-Jones (W) anharmonic lattices. Numerical simulations reveal the presence of high-energy strongly localized "discrete" kink-solitons (DK), which move with supersonic velocities that are proportional to kink amplitudes. For small amplitudes, the DKs of the FPU lattice reduce to the well-known "continuous" kink-soliton solutions of the modified Korteweg-de Vries equation. For high amplitudes, we obtain a consistent description of these DKs in terms of approximate solutions of the lattice equations that are obtained by restricting to a bounded support in space exact solutions with sinusoidal pattern characterized by the "magic" wave number k = 2pi/3. Relative displacement patterns, velocity vs. amplitude, dispersion relation and exponential tails found in numerical simulations are shown to agree very well with analytical predictions, for both FPU and LJ lattices MH - Italy MH - Mexico|San Luis Potosi MH - Rep of Georgia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0295-5075 UR - ISI:000223030800004 L2 - LOCALIZED VIBRATIONAL-MODES; MODULATIONAL INSTABILITY; ENERGY EQUIPARTITION; NONLINEAR LATTICES; OSCILLATOR CHAIN; BREATHERS; STATIONARY; FREQUENCY; STABILITY; EQUATION SO - Europhysics Letters 2004 ;66(1):21-27 11308 UI - 5324 AU - Koshevaya S AU - Hayakawa M AU - Grimalsky V AU - Siqueiros A AU - Perez E AU - Kotsarenko A AD - Autonomous Univ State Morelos, Res Ctr Appl Sci & Engn, CIICAp, FCQel, Cuernavaca 62210, Morelos, MexicoUniv Electrocommun, Chofu, Tokyo 182, JapanNatl Inst Astrophys Opt & Elect, INAOE, Puebla 72000, MexicoUNAM, Ctr Geociencias, Queretaro 76230, Qro, MexicoKoshevaya, S, Autonomous Univ State Morelos, Res Ctr Appl Sci & Engn, CIICAp, FCQel, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Modeling of nonlinear passage of acoustic waves caused by underground fracturing through the lithosphere AB - The nonlinear passage of the acoustic waves through the lithosphere to the surface of the Earth during earthquakes and strong underground explosions is analyzed in this report. The underlying mechanism for this is the nonlinear elastic modulus. The waves are excited at the underground source of the earthquakes. The passage of the acoustic waves propagating almost vertically upward leads to a change of the spectrum. The wide spectrum of the acoustic waves up to the radio wave range is assumed to be produced by the fracturing of the rock at the surface. This has been observed by means of satellite measurements and radio telescope investigation of meteor bombing of the Moon. If the fracture occurs at depth corresponding to high frequencies, the waves transform, through nonlinear interactions, into low and super low frequency waves. Low and super low elastic displacement waves reach the surface and produce a seismograph response. In the report the nonlinear excitation of ultra-low frequency (ULF) acoustic waves caused by low frequency (LF) seismic acoustic burst is also discussed. An analysis of the nonlinear transformation of LF acoustic waves (f similar to 100 Hz) into ULF (f less than or equal to 1 Hz) waves is presented. The LF wave is excited as the burst-like envelope of a finite transverse scale by the underground seismic motion caused seismic activity of the Earth. Then, it propagates upwards and is subject to both a nonlinear process and dissipation. The nonlinearity leads to the generation of higher harmonics and, thus, to a saw-like wave structure, and also to an increase of the ULF part of the wave spectrum. This process takes place underground at a depth of about 50-30 km. (C) 2004 Elsevier Ltd. All rights reserved MH - Japan MH - Mexico|Morelos MH - Mexico|Puebla MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 1474-7065 UR - ISI:000221832000036 L2 - IONOSPHERE SO - Physics and Chemistry of the Earth 2004 ;29(4-9):599-605 11309 UI - 3779 AU - Kosobryukhov AA AU - Bil' KY AU - Nishio JN AD - Russian Acad Sci, Inst Basic Problems Biol, Pushchino 142290, Moscow Oblast, RussiaCtr Invest Aliment & Desarrollo, Hermosillo 83000, Sonora, MexicoCalif State Univ Los Angeles, Coll Nat Sci, Chico, CA 95929, USAKosobryukhov, AA, Russian Acad Sci, Inst Basic Problems Biol, Pushchino 142290, Moscow Oblast, Russia TI - Sugar beet photosynthesis under conditions of increasing water deficiency in soil and protective effects of a low-molecular-weight alcohol AB - The rate of CO2 gas exchange, transpiration, stomatal conductivity, and efficiency of the use of water were assessed in leaves of the sugar beet (Beta vulgaris var. Saccharifera (Alef) Krass.) sprayed with 40% methanol, against the background of increasing water deficiency in soil. A decrease in the negative impact of water deficiency in experimental plants was shown to be due to the larger stress-resistance of the photosynthetic apparatus, higher rate of photosynthesis, and more effective use of water MH - Mexico|Sonora MH - Russia MH - USA PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0003-6838 UR - ISI:000225409500010 L2 - METHANOL; FOLIAR; PLANTS; STRESS; TOMATO; LEAVES; CO2 SO - Applied Biochemistry and Microbiology 2004 ;40(6):581-587 11310 UI - 6041 AU - Kostoff RN AU - Bedford CD AU - del Rio JA AU - Cortes HD AU - Karypis G AD - Off Naval Res, Arlington, VA 22217, USAUniv Nacl Mexico, Ctr Invest Energia, Mexico City, DF, MexicoUniv Minnesota, Minneapolis, MN, USAKostoff, RN, Off Naval Res, 800 N Quincy St, Arlington, VA 22217, USA TI - Macromolecule mass spectrometry: Citation mining of user documents AB - Identifying research users, applications, and impact is important for research performers, managers, evaluators, and sponsors. Identification of the user audience and the research impact is complex and time consuming due to the many indirect pathways through which fundamental research can impact applications. This paper identified the literature pathways through which two highly-cited papers of 2002 Chemistry Nobel Laureates Fenn and Tanaka impacted research, technology development, and applications. Citation Mining, an integration of citation bibliometrics and text mining, was applied to the >1600 first generation Science Citation Index (SCI) citing papers to Fenn's 1989 Science paper on Electrospray Ionization for Mass Spectrometry, and to the >400 first generation SCI citing papers to Tanaka's 1988 Rapid Communications in Mass Spectrometry paper on Laser Ionization Time-of-Flight Mass Spectrometry. Bibliometrics was performed on the citing papers to profile the user characteristics. Text mining was performed on the citing papers to identify the technical areas impacted by the research, and the relationships among these technical areas. (C) 2004 American Society for Mass Spectrometry MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Analytical;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 1044-0305 UR - ISI:000220023500001 L2 - ULTRAVIOLET-LASER DESORPTION; ELECTROSPRAY ION-SOURCE; IONIZATION; PROTEINS; BIBLIOMETRICS; INFORMATION; SCIENCE; PHYSICS; TRENDS SO - Journal of the American Society for Mass Spectrometry 2004 ;15(3):281-287 11311 UI - 5568 AU - Kotov AA AU - Garfias-Espejo T AU - Elias-Gutierrez M AD - Colegio Frotera Sur, Quintana Roo, MexicoAN Severtsov Inst Ecol & Evolut, Moscow 117071, RussiaElias-Gutierrez, M, Colegio Frotera Sur, Av Cenyanario Km 5-5, Quintana Roo, Mexico TI - Separation of two Neotropical species: Macrothrix superaculeata (Smirnov, 1982) versus M-elegans Sars, 1901 (Macrothricidae, Anomopoda, Cladocera) AB - The morphology of two Neotropical taxa, Macrothrix elegans Sars, 1901 and M. superaculeata ( Smirnov, 1982) (Macrothricidae, Anomopoda, Cladocera) was redescribed, based on type materials (a lectotype of M. elegans was selected here), and additional samples from the Americas. Previous conclusion about synonymy of both species was erroneous, because it was based on limited material from South America. M. superaculeata differs from M. elegans in the presence of a sharp spine at postero-dorsal angle of valves; a more fine ring around dorsal head pore; thinner hexagonal reticulation of valves; the presence of setules on basal segment of postabdominal seta; armature of exopod on antenna II, and some features of thoracic limbs. Previously, the discriminative features of the two species were not formulated accurately, and it was a reason of several misidentifications. Actually, M. superaculeata is found only in a limited set of localities from the Amazon basin, while M. elegans is one of the most common anomopod species in all Neotropics, from Argentina to Mexico MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000221338200005 L2 - taxonomy;neotropics;morphology;macrotricid;morphological variability;TRUNK LIMBS; CRUSTACEA; CHYDORIDAE; BRANCHIOPODA; MEXICO; MORPHOLOGY SO - Hydrobiologia 2004 ;517(1-3):61-88 11312 UI - 3836 AU - Kovacs JM AU - Malczewski J AU - Flores-Verdugo F AD - Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, CanadaUniv Western Ontario, Dept Geog, London, ON N6A 5C2, CanadaUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoKovacs, JM, Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, Canada TI - Examining local ecological knowledge of hurricane impacts in a mangrove forest using an analytical hierarchy process (AHP) approach AB - To examine the observations of fishermen regarding the impact of a hurricane on a mangrove forest of the Mexican Pacific, twenty-two structured interviews using an Analytical Hierarchy Process (AHP) approach were conducted in four villages of the Teacapan-Agua Brava lagoon-estuarine system. The local fishermen were asked to assess the likelihood that a mangrove tree would not survive a hurricane based on three attributes: main stem condition, diameter of main stem and species. The results suggest a high degree of consistency amongst the villages and with the observations of a previous investigation using the traditional scientific data collection methods. With few exceptions, the fishermen indicated that large diameter trees were the most susceptible to hurricanes. Conversely, that black mangrove (Avicennia germinans) and an intact main stem condition would indicate a better likelihood of surviving such an event. From the results of this investigation, it is suggested that the use of the AHP method can facilitate in the collection and interpretation of local ecological knowledge by scientists. Moreover, the output of this procedure, the vector of weights, can be used for comparison with scientific data collected by traditional means and for comparison with the observations of local peoples from other geographical locations MH - Canada MH - Mexico|Sinaloa PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000225203600016 L2 - coastal forested wetland;local perceptions;Pacific coast;Mexico;SCIENTIFIC-KNOWLEDGE; DAMAGE; INFORMATION; VEGETATION; WETLAND; FLORIDA; MEXICO SO - Journal of Coastal Research 2004 ;20(3):792-800 11313 UI - 4350 AU - Kovacs JM AU - Flores-Verdugo F AU - Wang JF AU - Aspden LP AD - Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, CanadaUNAM, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoUniv Western Ontario, Dept Geog, London, ON N6A 5C2, CanadaKovacs, JM, Nipissing Univ, Dept Geog, N Bay, ON P1B 8L7, Canada TI - Estimating leaf area index of a degraded mangrove forest using high spatial resolution satellite data AB - Leaf Area Index (LAI) values from 124 mangrove plots were acquired within a degraded mangrove forest of the Agua Brava Lagoon System of Nayarit (Mexico) using a hand held LAI-2000 Plant Canopy Analyzer. For each plot, two values of LAI were calculated to represent approximate half radii (180) ground coverage of 8 m and 15 m. The location of each plot was recorded at sub-meter accuracy using an Ashtech SCA-12 GPS. Using a geometrically corrected IKONOS satellite image, the mean values for both the Normalized Difference Vegetation Index (NDVI) and the simple ratio (SR) vegetation indices were also calculated for each plot. Regression analyses of the in situ LAI with both vegetation indices revealed significant positive relationships (LAI versus NDVI at 8 m (R-2 = 0.71); LAI versus NDVI at 15 m (R-2 = 0.70); LAI versus SR at 8 m (R-2 = 0.73); LAI versus SR at 15 m (R-2 = 0.72)) at the 8 m and 15 m plot sizes. Standard errors, derived from the testing of the regression models with a random sample, revealed little difference between the models. Moreover, F-tests of the residual variances also indicated no significant difference between the SR and NDVI models at both plot sizes. Consequently, the results indicate that each model could be used to successfully predict LAI. It is thus suggested that high spatial resolution IKONOS data can be employed as a valuable tool for monitoring LAI in less than ideal mangrove forests (i.e. disturbed stands). (C) 2004 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000224132800002 L2 - remote sensing;LAI-2000;IKONOS;mangrove;Mexican Pacific;DEFOLIATION; IMAGERY SO - Aquatic Botany 2004 ;80(1):13-22 11314 UI - 4145 AU - Koval'chuk AV AU - Golovataya NM AU - Shevehuk AF AU - Naiko DA AU - Basiuk EV AD - Natl Acad Sci Ukraine, Inst Phys, UA-03028 Kiev, UkraineVinnitsa State Agr Univ, Vinnitsa, UkraineUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoKoval'chuk, AV, Natl Acad Sci Ukraine, Inst Phys, 46 Nauky Prospekt, UA-03028 Kiev, Ukraine TI - Dielectric properties of (C-60+C-70)-ferroelectric liquid crystal composite AB - A stable composite of fullerene and ferroelectric liquid crystal (FLC) has been obtained. Analysis of the frequency dependence of imaginary part of complex dielectric permittivity showed that orientation of the liquid crystal (LC) in the composite is close to homeotropic. At temperatures above 329 K, the composite conductance is determined by the conductance of fullerene. At 344 K, the composite conductance is 3.2 x 10(-8) Omega(-1) m(-1), and the activation energy for the temperature dependence of conductance is 0.99 eV. At temperatures below 329 K, the composite properties are determined by the LC, and the frequency dependences of the components of complex dielectric permittivity showed dispersion due to rotation of molecular dipoles around the helicoid (Gold-stone mode) axis. The relaxation time is close to 1 msec and almost equal to the value obtained for homeotropically oriented LC MH - Mexico|Distrito Federal MH - Ukraine PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1536-383X UR - ISI:000224515800010 L2 - liquid crystal;fullerenes;isotropic phase;ionic conductivity;RELAXATION PROCESSES SO - Fullerenes Nanotubes and Carbon Nanostructures 2004 ;12(3):681-690 11315 UI - 4400 AU - Kranakis E AU - Krizanc D AU - Urrutia J AD - Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaWesleyan Univ, Dept Math & Comp Sci, Middletown, CT 06459, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoKranakis, E, Carleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, Canada TI - Coverage and connectivity in networks with directional sensors (extended abstract) AB - We consider the problem of providing full coverage of a planar region with sensors. Likewise, we consider the connectivity of the sensor network of directional antennas formed by sensors in this region. Suppose that n sensors with coverage angle (also known as beam width) alpha(n), and reachability radius r(n) are thrown randomly and independently with the uniform distribution in the interior of the unit square. Let p(n) be the probability that a given sensor is active. We prove that if p(n) = Omega (log(n/r(n)(2)sin(2)(alpha(n)/4))/nr(n)(2)alpha(n)sinalpha(n)/4)) then the probability the sensors pro vide full coverage of the unit square is at least 1 - n(-O(1)). Likewise, we consider the connectivity of the resulting sensor network. We show that if p(n) = Omega (log(n/r(n)(2)sin(2)(alpha(n)/4))/nr(n)(2)alpha(n)sin(2)(alpha(n)/4) then the probability that a connected subnetwork of sensors provides full coverage is at least 1 - n(-O(1)) MH - Canada MH - Mexico|Distrito Federal MH - USA PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000223792500122 SO - Euro-Par 2004 Parallel Processing, Proceedings 2004 ;3149():917-924 11316 UI - 3362 AU - Kribs-Zaleta CM AD - Univ Texas, Dept UTA Math, Arlington, TX 76019, USAUniv Colima, COL Mexico, Mexico City, DF, MexicoKribs-Zaleta, CM, Univ Texas, Dept UTA Math, POB 19408, Arlington, TX 76019 USA TI - To switch or taper off: the dynamics of saturation AB - Many situations in population biology involve a rate - typically a contact or recruitment rate - which increases linearly for small populations but reaches a maximum value (saturates) for large populations. Models for populations of variable size need to incorporate both characteristics to predict behavior accurately. This can be done by defining the rate as a continuous, piecewise linear function with a switch point, or via a Verhulst-type (smooth) saturation function. This paper presents several examples of both approaches and draws some conclusions about the differences from a modeling perspective. (C) 2004 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0025-5564 UR - ISI:000226463700003 L2 - saturation;contact process;switching model;variable population;EPIDEMIC MODELS; POPULATIONS SO - Mathematical Biosciences 2004 ;192(2):137-152 11317 UI - 4808 AU - Kring DA AU - Horz F AU - Zurcher L AU - Fucugauchi JU AD - Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721, USANASA, Lyndon B Johnson Space Ctr, Planetary Sci Branch, SN2, Houston, TX 77058, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoKring, DA, Univ Arizona, Lunar & Planetary Lab, 1629 E Univ Blvd, Tucson, AZ 85721 USA TI - Impact lithologies and their emplacement in the Chicxulub impact crater: Initial results from the Chicxulub Scientific Drilling Project, Yaxcopoil, Mexico AB - The Chicxulub Scientific Drilling Project (CSDP), Mexico, produced a continuous core of material from depths of 404 to 1511 m in the Yaxcopoil-1 (Yax-1) borehole, revealing (top to bottom) Tertiary marine sediments, polymict breccias, an impact melt unit, and one or more blocks of Cretaceous target sediments that are crosscut with impact-generated dikes, in a region that lies between the peak ring and final crater rim. The impact melt and breccias in the Yax-1 borehole are 100 m thick, which is approximately 115 the thickness of breccias and melts exposed in the Yucatan-6 exploration hole, which is also thought to be located between the peak ring and final rim of the Chicxulub crater. The sequence and composition of impact melts and breccias are grossly similar to those in the Yucatan-6 hole. Compared to breccias in other impact craters, the Chicxulub breccias are incredibly rich in silicate melt fragments (up to 84% versus 30 to 50%, for example, in the Ries). The melt in the Yax-1 hole was produced largely from the silicate basement lithologies that lie beneath a 3 km-thick carbonate platform in the target area. Small amounts of immiscible molten carbonate were ejected with the silicate melt, and clastic carbonate often forms the matrix of the polymict breccias. The melt unit appears to have been deposited while molten but brecciated after solidification. The melt fragments in the polymict breccias appear to have solidified in flight, before deposition, and fractured during transport and deposition MH - USA MH - Mexico|Distrito Federal PB - FAYETTEVILLE: METEORITICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1086-9379 UR - ISI:000222939300009 L2 - CRETACEOUS-TERTIARY BOUNDARY; PEAK-RING FORMATION; MELT ROCK; RIES CRATER; CONSTRAINTS; HAITI; GLASS; SIZE; STRATIGRAPHY; SPHERULES SO - Meteoritics & Planetary Science 2004 ;39(6):879-897 11318 UI - 4617 AU - Kroes HY AU - Olney RS AU - Rosano A AU - Liu YC AU - Castilla EE AU - Cocchi G AU - De Vigan C AU - Martinez-Frias ML AU - Mastroiacovo P AU - Merlob P AU - Mutchinick O AU - Ritvanen A AU - Stoll C AU - van Essen AJ AU - Cobben JM AU - Cornel MC AD - Univ Utrecht, Med Ctr, Dept Med Genet, Utrecht, NetherlandsCtr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabilities, Atlanta, GA, USAItalian Inst Social Med, Rome, ItalyWHO, ECLAMC, Collaborat Ctr Prevent Birth Defects, Dept Genet,Inst Oswaldo Cruz, Rio De Janeiro, BrazilECLAMC, Ctr Educ Med & Invest Clin, Buenos Aires, DF, ArgentinaUniv Bologna, Inst Clin Pediat Prevent Neonatol, Bologna, ItalyINSERM, U 149, Paris Birth Defects Monitoring Program, Paris, FranceInst Salud Carlos III, ECEMC, Ctr Invest Anomalias Congenitas, Ministerio Sanidad & Consumo, Madrid, SpainUniv Cattolica S Cuore, Inst Pediat, Birth Defects Unit, Rome, ItalyIsrael Birth Defect Monitoring Syst, Rabin Med Ctr, Petah Tiqwa, IsraelInst Nacl Nutr, Dept Genet, Mexico City, DF, MexicoSTAKES, Natl Res & Dev Ctr Welf & Hlth, Helsinki, FinlandHop Hautepierre, Serv Genet Med, Strasbourg, FranceUniv Groningen Hosp, Dept Med Genet, Groningen, NetherlandsAcad Med Ctr, Dept Pediat, Amsterdam, NetherlandsVU Univ Med Ctr, Dept Clin Genet & Human Genet, Amsterdam, NetherlandsCornel, MC, VU Univ Med Ctr, Clin Genet & Human Genet, POB 7057, NL-1007 MB Amsterdam, Netherlands TI - Renal defects and limb deficiencies in 197 infants: Is it possible to define the "acrorenal syndrome"? AB - Dieker and Opitz in 1969 described the simultaneous occurrence of limb deficiencies (LDs) and renal anomalies (RAs) in three patients. Curran and Curran introduced in 1972 the term "acrorenal syndrome." Since then, the term "acrorenal syndrome" is used occasionally, but a well-circumscribed definition has never been established. On the other hand, the concept of an acrorenal polytopic developmental field defect was postulated by Opitz and others to explain the association between RAs and LDs. We undertook this study to investigate whether this acrorenal "syndrome" could be identified in a large group of cases with congenital RAs and a limb deficiency. Eleven birth defect registries that are part of the International Clearinghouse for Birth Defects Monitoring (i.e., registries of ICBDMS in Finland, France [Paris and Strasbourg], Israel, Italy [IPIMC and Emilia Romagna], Mexico, Northern Netherlands, South America, Spain, and the United States [Atlanta]) provided data on 815 infants who had a LD and at least one other major congenital anomaly. These 815 cases were ascertained among 5,163,958 births. We selected the 197 cases who had both a limb deficiency and a renal or urinary tract anomaly. In about 50% of these cases a diagnosis or a recognized phenotype was reported, with chromosomal aberrations and VACTERL being most frequent. In the group with no diagnosis or recognized phenotype (95 cases), we looked for (a) clustering of specific types of LDs and RAs, and (b) for clustering of associated anomalies, in order to find evidence for and be able to define better the term "acrorenal syndrome." Our data suggest that an association exists between LDs and RAs, possibly explained by the concept of the acrorenal polytopic developmental field defect. However, our dataset does not yield evidence for the existence of one distinct "syndrome," defined as a pattern of causally related multiple anomalies. Therefore, use of the term "acrorenal syndrome" should be avoided. (C) 2004 Wiley-Liss, Inc MH - Argentina MH - Brazil MH - Finland MH - France MH - Israel MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Spain MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000223478900008 L2 - limb deficiency;renal anomalies;acrorenal syndrome;VATER;association;limb-body wall complex;birth defects;developmental field defect;MULTIPLE CONGENITAL-ANOMALIES; OCULAR SYNDROME; THALIDOMIDE EMBRYOPATHY; VERTEBRAL DEFECTS; HYPOPLASIA; MORPHOGENESIS; MESONEPHROS; CHONDROGENESIS; TERATOGENESIS; RETARDATION SO - American Journal of Medical Genetics Part A 2004 ;129A(2):149-155 11319 UI - 4965 AU - Krokhin AA AU - Reyes E AD - Univ N Texas, Dept Phys, Denton, TX 76203, USAUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoKrokhin, AA, Univ N Texas, Dept Phys, POB 311427, Denton, TX 76203, USA TI - Homogenization of magnetodielectric photonic crystals AB - We calculate the low-frequency index of refraction of a medium which is homogeneous along axis z and possesses a periodic dependence of the permittivity epsilon(r) and permeability mu(r) in the x-y plane (2D magnetodielectric photonic crystal). Exact analytical formulas for the effective index of refraction for two eigenmodes with vector E or H polarized along axis z are obtained. We show that, unlike nonmagnetic photonic crystals where the E mode is ordinary and the H mode is extraordinary, now both modes exhibit extraordinary behavior. Because of this distinction, the magnetodielectric photonic crystals exhibit optical properties that do not exist for natural crystals. We also discuss the limiting case of perfectly conducting cylinders and clarify the so-called problem of noncommuting limits, omega-->0 and epsilon-->infinity MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000222532100039 L2 - BAND-GAPS; NONCOMMUTING LIMITS; ACOUSTIC BAND; PERMEABILITY; COMPOSITES; CYLINDERS; ARRAYS SO - Physical Review Letters 2004 ;93(2): 11320 UI - 5055 AU - Krupski P AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoKrupski, P, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Families of continua with the property of Kelley, arc continua and curves of pseudo-arcs AB - It is shown that (1) the family of all continua in I-n, n greater than or equal to 2, which have the property of Kelley (with the Hausdorff metric) is an absolute true F-sigmadelta-set; (2) the family of all arc continua in I-n, n greater than or equal to 3, is coanalytic complete; (3) the families of all arcs, circles, solenoids of pseudo-arcs and all Menger or Sierpinski curves of pseudo-arcs in cubes are Borel sets which are not Gr(deltasigma) MH - Mexico|Distrito Federal MH - Poland PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000222266300011 L2 - arc continuum;Borel set;coanalytic set;curve of pseudo-arcs;hyperspace;property of Kelley;solenoid;universal curve;HOMOGENEITY SO - Houston Journal of Mathematics 2004 ;30(2):459-482 11321 UI - 5211 AU - Kryshtab T AU - Gomez JP AU - Mazin M AU - Gasga GG AD - IPN, ESFM, UPALM, Dept Mat Sci, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, UA-03028 Kiev, UkraineUniv Autonoma Metropolitana Azcapotzalco, Dept Mat Sci, Mexico City 02200, DF, MexicoKryshtab, T, IPN, ESFM, UPALM, Dept Mat Sci, Edif 9, Mexico City 07738, DF, Mexico TI - Phenomenon of extinction in textured materials analysis as a source of both physical error and information on microstructure characteristics AB - The correction of pole density in the analysis of textured materials by means of an original X-ray diffraction technique is proposed. In the framework of the conventional model of mosaic crystals and the dynamic theory of X-ray diffraction, a method for the separation and determination of the primary and secondary extinction parameters is developed. From these parameters, microstructural features in textured materials, such as the average domain size, the domain misorientation angle and the dislocation density at the domain boundaries are evaluated. The essential influence of the extinction phenomenon on the directly calculated pole densities and the incorrect interpretation of the texture modifications is demonstrated for the case of aluminum samples after cold rolling and different stages of thermal annealing. Conventional determination of the pole densities for low-index reflections shows a decrease in their magnitudes after the first and second stages of recrystallization; on the contrary, second-order reflections indicate an increase in the pole densities. Extinction corrections remove this inconsistency. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6454 UR - ISI:000222122500018 L2 - X-ray diffraction;extinction;texture;microstructure;dislocations;DARWIN TRANSFER EQUATIONS; SECONDARY-EXTINCTION; SPHERICAL CRYSTALS; DIFFRACTION; VALIDITY; LIMIT SO - Acta Materialia 2004 ;52(10):3027-3034 11322 UI - 5447 AU - Kubo I AU - Fujita KI AU - Kubo A AU - Nihei KI AU - Ogura T AD - Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720, USAUniv Autonoma Guadalajara, Dept Quim, Guadalajara 44100, Jalisco, MexicoKubo, I, Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA TI - Antibacterial activity of coriander volatile compounds against Salmonella choleraesuis AB - Aliphatic (2E)-alkenals and alkanals characterized from the fresh leaves of the coriander Coriandrum sativum L. (Umbelliferae) were found to possess bactericidal activity against Salmonella choleraesuis ssp. choleraesuis ATCC 35640. (2E)-Dodecenal (C-12) was the most effective against this food-borne bacterium with the minimum bactericidal concentration (MBC) of 6.25 mug/mL (34 muM), followed by (2E)-undecenal (C-11) with an MBC of 12.5 mug/mL (74 muM). The time-kill curve study showed that these alpha,beta-unsaturated aldehydes are bactericidal against S. choleraesuis at any growth stage and that their bactericidal action comes in part from the ability to act as nonionic surfactants MH - USA MH - Mexico|Jalisco PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000221652400019 L2 - anti-Salmonella activity;Coriandrum sativum;Salmonella choleraesuis;(2E)-alkenals;surfactant activity;SACCHAROMYCES-CEREVISIAE; ANTIMICROBIAL ACTIVITY; ALIPHATIC-ALDEHYDES; ANTIFUNGAL ACTION; ESCHERICHIA-COLI; FLAVOR COMPOUNDS; CASHEW APPLE; AGENTS; DISTILLATION; ALCOHOLS SO - Journal of Agricultural and Food Chemistry 2004 ;52(11):3329-3332 11323 UI - 6640 AU - Kuhn F AU - Mester V AU - Morris R AU - Dalma J AD - Univ Alabama, Birmingham, AL, USAHelen Keller Fdn Res & Educ, Birmingham, AL, USAUniv Pecs, Pecs, HungaryMafraq Hosp, Abu Zaby, U Arab EmiratesHosp Angeles Lomas, Ophthalmol Serv, Mexico City, DF, MexicoHosp Angeles Lomas, Mexican Eye Injury Registry, Mexico City, DF, MexicoAsociac Evitar Ceguera, Mexico City, DF, MexicoKuhn, F, Amer Soc Oculat Trauma, 1201 11th Ave S,Suite 300, Birmingham, AL 35205 USA TI - Serious eye injuries caused by bottles containing carbonated drinks AB - Aim: To analyse serious eye injuries caused by bottles containing pressurised drinks. Methods: Retrospective review of the databases of US, Hungarian, and Mexican eye injury registries. Results: In the combined database ( 12 889 injuries), 90 cases ( 0.7%) were caused by bottle tops or glass splinters. The incidence varied widely: 0.3% ( United States), 3.1% ( Hungary), and 0.9% ( Mexico), as did the agent. Champagne bottle corks were responsible in 20% ( United States), 71% (Hungary; p< 0.0001), and 0% ( Mexico). Most eyes improved, but 26% remained legally blind. Conclusions: The presence of warning labels on champagne bottles appears to reduce cork related eye injuries, as does using plastic bottles and caps MH - USA MH - Hungary MH - Mexico|Distrito Federal MH - U Arab Emirates PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology U5 - J;Article AV - English IS - 0007-1161 UR - ISI:000187535400021 L2 - EXPLODING BEVERAGE BOTTLES; OCULAR INJURIES; SOFT DRINK; REGISTRY; TRAUMA SO - British Journal of Ophthalmology 2004 ;88(1):69-71 11324 UI - 3901 AU - Kulkarni S AU - Olivares JC AU - Escarela-Perez R AU - Lakhiani VK AU - Turowski J AD - Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, IndiaInst Technol Super Zapopan, Zapopan 45019, MexicoUniv Autonoma Metropolitana Azcapotzalco, Dept Energia, Mexico City 02200, DF, MexicoCrompton Greaves Ltd, Transformer Div, Bombay 400042, Maharashtra, IndiaTech Univ Lodz, Inst Elect Machines & Transformers, PL-90924 Lodz, PolandKulkarni, S, Indian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, India TI - Evaluation of eddy current losses in the cover plates of distribution transformers AB - The elimination of hot spots and the reduction of eddy current losses in bushing mounting plates is an important consideration in transformer design. The currently used bushing mounting plates are either mild steel plates, or mild steel plates with non-magnetic stainless steel inserts or stainless steel plates. The authors calculate the eddy current losses in bushing mounting plates using four different methods; (i) an analytical formulation; (ii) a three-dimensional finite element method (FEM); (iii) from measured values of the initial temperature rise; and (iv) from measured values of the steady-state temperature rise. There is a close agreement between the loss values obtained using these four methods. The analysis has resulted in a detailed understanding of the loss pattern and temperature rise phenomenon in bushing mounting plates. The authors also analyse tank plates of small pad-mounted distribution transformers. It is shown that judicious use of non-magnetic stainless steel can result in considerable energy savings for pad-mounted transformers. FEM simulations are performed to find out cost-effective materials for the tank plates of the pad-mounted transformers. A T-shaped stainless steel plate is found to significantly reduce the load loss. The results of the simulations have been verified on a 225 kVA pad-mounted transformer MH - India MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Poland PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1350-2344 UR - ISI:000225106700001 L2 - POWER TRANSFORMERS SO - Iee Proceedings-Science Measurement and Technology 2004 ;151(5):313-318 11325 UI - 3568 AU - Kulkarni SS AU - Dattatreya GR AU - Martinez H AU - Soto R AD - Univ Texas, Dept Comp Sci, EC 31, Richardson, TX 75083, USAVillanova Univ, Dept Elect & Comp Engn, Villanova, PA 19085, USAITESM, Ctr Artificial Intelligence, Monterrey 68489, NL, MexicoDattatreya, GR, Univ Texas, Dept Comp Sci, EC 31, Richardson, TX 75083 USA TI - Adaptive control of heterogeneous ad hoc networks AB - Heterogeneous ad hoc networks are proposed as a solution to the scalability problem in pure ad hoc networks. Some of the links in heterogeneous networks have a much longer wireless transmission range (in one or more of their channels) than the other links. We study simple approaches for adaptive operation and performance optimization of such networks. Our study includes the following: (a) Use of very simple functions of observed performance for adaptive control; (b) Accommodation of an operational constraint imposed by a higher layer in the network. In this case, traffic from a forwarding node to a neighboring node, meant for an eventual destination, can be multiplexed over either long range links or over short range links but not both; (c) Route selection using extremely simple, predetermined criteria; (d) Performance comparison of the above three simplified approaches to the original algorithm of Reference [4]. The original algorithm is computationally more accurate, but handicapped by the absence of long range links. Our approaches are illustrated with simulation experiments on heterogeneous ad hoc networks fielding synthetic self-similar (bursty) traffic. The performance comparisons of the approaches are presented for both fixed as well as dynamic network topologies. They emphasize the advantage of heterogeneous network operation over a pure ad hoc network, all nodes in the latter being functionally identical. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Nuevo Leon MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Information Systems;Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1530-8669 UR - ISI:000225866600011 L2 - adaptive performance optimization;interconnection of wireless networks;MANET scalability;mobile packet radio network;nonuniform transmission range;self-similar traffic control;PROTOCOLS SO - Wireless Communications & Mobile Computing 2004 ;4(8):963-975 11326 UI - 6399 AU - Kumar GA AU - Martinez A AU - Mejia E AU - Eden JG AD - State Univ New Jersey, Dept Ceram & Mat Engn, Piscataway, NJ 08854, USACtr Invest Opt, Leon, GTO, MexicoUniv Illinois, Lab Opt Phys & Engn, Dept Elect & Comp Engn, Urbana, IL 61801, USAKumar, GA, State Univ New Jersey, Dept Ceram & Mat Engn, 607 Taylor Rd, Piscataway, NJ 08854 USA TI - Fluorescence and upconversion spectral studies of Ho3+ in alkali bismuth gallate glasses AB - The absorption and emission spectra of Ho3+ in alkali bismuth gallate glass matrices have been investigated in the visible and near-infrared. Strong fluorescence in the green (lambda similar to 549 nm), arising from the S-5(2) --> I-5(8) transition of the ion, has been observed when Ho-doped potassium bismuth gallate glass is optically-excited in the red (similar to646 nm). The measured quadratic dependence of the relative 549 nm intensity on pump power demonstrates that the upconversion mechanism is the sequential absorption of two photons. For a pump power of 285 mW at 646 nm, the upconversion efficiency is measured to be 5.5% which is among the highest values reported for glassy or crystalline matrices. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Guanajuato MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000188370800024 L2 - spectroscopy;glasses;fluorescence;RARE-EARTH IONS; FIBER LASER; INTENSITIES SO - Journal of Alloys and Compounds 2004 ;365(1-2):117-120 11327 UI - 6004 AU - Kumar RP AU - Singh AK AU - Butcher RJ AU - Sharma P AU - Toscano RA AD - Indian Inst Technol, Dept Chem, New Delhi 110016, IndiaHoward Univ, Dept Chem, Washington, DC 20059, USAUNAM, Inst Quim, Mexico City 04510, DF, MexicoSingh, AK, Indian Inst Technol, Dept Chem, New Delhi 110016, India TI - Tellurated Schiff bases formed from {2-[(4-methoxyphenyl)telluro]ethyl}amine and bis(2-aminoethyl) telluride with o-hydroxyacetophenone: Synthesis and complexation reactions with Hg-II, Pd-II and Ru-II - Crystal structures of the ligands, [Ru(p-cymene)Cl{H2NCH2CH2TeC6H4-4-OCH3}]Cl center dot H2O and [RuCl{4-MeOC6H4TeCH2CH2NHCH(CH3)C6H4-2-O-}] AB - (2 - [ (4 -Methoxyphenyl)telluro] ethyl) amine and bis(2-aminoethyl) telluride on treatment with o-hydroxyacetophenone gave the Schiff bases 4-MeOC6H4TeCH2CH2N= C(CH3)C6H4-2-OH (L-1) and 2-HOC6H4(CH3)C= NCH2CH2TeCH2CH2N=C(CH3)C6H4-2-OH (L-3), respectively. The reduction of L-1 and L-3 with NaBH4 resulted in 4-MeOC6H4TeCH2CH2NHCH(CH3)C6H4-2-OH (L-2) and 2-HOC6H4(CH3)CHNHCH2CH2TeCH2CH2NHCH(CH3)C6H4- 2-OH (L-4), respectively, which have 1 or 2 chiral centers. The H-1 and C-13 NMR spectra of L-1 to L-4 were found to be characteristic. Treatment of V with [Ru(p-cymene)Cl-2](2) resulted in [Ru(p-cymene)(4-MeOC6H4TeCH2CH2NH2)cl]Cl.H2O (1) whereas in the reaction of L-2 with [Ru(p-cymene)Cl-2](2), the p-cymene ligand is lost resulting in [RuCl(L-2-H)] (4). The reactions of L-1, L-3 and L-4 with HgBr2 resulted in complexes of the type [HgBr2.(L)(2)] while Na2PdCl4 reacted with L-1 to give [PdCI(L-1-H)]. The solid-state structures of L-1, L-3, 1 and 4 were determined by single-crystal X-ray diffraction studies. The very swift formation of the tellurated amine from a tellurated Schiff base (L-1) by hydrolysis has been observed for the first time and has resulted in 1. The Ru-N and Ru-Te bond lengths in 1 are 2.142(3) and 2.6371 (4) Angstrom, respectively. The replacement of the p-cymene ligand with a hybrid organotellurium ligand (L-2-H), resulting in 4, is also a first example of its kind. The Ru center in 4 has a square-planar geometry, with the Ru-N, Ru-Te, Ru-O and Ru-Cl bond lengths being 2.041(6), 2.4983(8), 2.058(5) and 2.308(2) Angstrom, respectively. In the crystals of 4 there are secondary intermolecular Te...Cl interactions and intermolecular N-H...O hydrogen bonds. This is the first example in which coordinated Te in a complex is engaged in two intermolecular secondary interactions. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) MH - India MH - Mexico|Distrito Federal MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000220230100027 L2 - Schiff bases;ruthenium;tellurium;X-ray diffraction;synthetic methods;X-RAY-STRUCTURE; RUTHENIUM COMPLEXES; ORGANOTELLURIUM LIGANDS; LIGATION; L-1; PD(II); PLATINUM(II); MERCURY(II); RU(II); PT(II) SO - European Journal of Inorganic Chemistry 2004 ;(5):1107-1114 11328 UI - 4396 AU - Kuno A AU - Matsuo M AU - Soto AP AU - Tsukamoto K AD - Univ Tokyo, Grad Sch Arts & Sci, Meguro Ku, Tokyo 1538902, JapanUniv Nacl Autonoma Mexico, Inst Invest Estet, Mexico City 04510, DF, MexicoEscuela Nacl Antropol & Hist, Mexico City, DF, MexicoKuno, A, Univ Tokyo, Grad Sch Arts & Sci, Meguro Ku, 3-8-1 Komaba, Tokyo 1538902, Japan TI - Mossbauer spectroscopic study of a mural painting from Morgadal Grande, Mexico AB - In this study, Fe-57 Mossbauer spectroscopy has been applied to fragments of a mural painting excavated at Morgadal Grande, Mexico, to characterize the pigments used. A sextet attributable to hematite (alpha-Fe2O3) was clearly detected in the red fragments. The spectra of orange fragments showed a doublet attributable to paramagnetic high-spin Fe3+, which presumably originates from goethite (alpha-FeOOH) exhibiting superparamagnetic relaxation due to its small particle size. The blue fragments contained little iron. The scattered X-ray Mossbauer spectra revealed that the thickness of the pigments was larger than 20 mum MH - Japan MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Atomic, Molecular & Chemical;Physics, Condensed Matter;Physics, Nuclear U5 - J;Article AV - English IS - 0304-3843 UR - ISI:000224130500066 L2 - Mossbauer spectroscopy;Morgadal Grande;mural painting;pigment;ELECTRONS SO - Hyperfine Interactions 2004 ;156(1):431-437 11329 UI - 4104 AU - Kurtz S AU - Hofner P AU - Alvarez CV AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoNew Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USANatl Radio Astron Observ, Socorro, NM 87801, USAUniv Puerto Rico, Dept Phys, Mayaguez, PR 00680, USAKurtz, S, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Apartado Postal 3-72, Morelia 58089, Michoacan, Mexico TI - A catalog of CH3OH 7(0)-6(1) A(+) maser sources in massive star-forming regions AB - We present a Very Large Array survey of 44 massive star-forming regions in the 44 GHz 7(0)-6(1) A(+) methanol transition; 37 fields showed maser emission. Thirty-one sources were also observed in the 23 GHz 9(2)-10(1) A(+) methanol line; two fields showed maser emission. Although the 44 GHz line is a class I maser, we find a large number of these masers in relatively close association with H II regions and water masers. Several sources show strong evidence for a correlation between 44 GHz masers and shocked molecular gas, supporting the interpretation that molecular outflows may give rise to class I maser emission. We provide maser positions with arcsecond accuracy that not only locate the masers with respect to other star formation phenomena, but also provide, for the stronger masers, phase referencing sources that can be used to calibrate future 7 mm (44 GHz) observations of these regions MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000224700400009 L2 - catalogs;HII regions;ISM : molecules;masers;stars : early-type;stars : formation;H-II REGIONS; ULTRACOMPACT HII-REGIONS; LUMINOUS IRAS SOURCES; RECOMBINATION LINE OBSERVATIONS; STRONG METHANOL MASERS; VLA OBSERVATIONS; RADIO-CONTINUUM; PROTOSTELLAR CANDIDATES; RESOLUTION MILLIMETER; PHYSICAL-PROPERTIES SO - Astrophysical Journal Supplement Series 2004 ;155(1):149-165 11330 UI - 5316 AU - Kushwaha MS AU - Sakaki H AD - Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, JapanKushwaha, MS, Univ Autonoma Puebla, Inst Phys, Av San Claudio & 18 Sur, Puebla 72570, Mexico TI - Minigap plasmons in a two-dimensional electron gas subjected to a one-dimensional periodic potential AB - We investigate the plasmon excitations in a two-dimensional electron gas subjected to a one-dimensional weak periodic potential. We derive and discuss the dispersion relations for both intrasubband and intersubband excitations within the framework of Bohm-Pines' random-phase approximation. For such an anisotropic system with spatially modulated charge density, we observe a splitting of the 2D plasmon dispersion. The splitting is caused by the superlattice effect of the charge-density modulation on the collective excitation spectrum. We also discuss how the tunneling and the potential amplitude affect the plasmon excitations. (C) 2004 Elsevier Ltd. All rights reserved MH - Japan MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000221843500002 L2 - quantum wells;quantum wires;nanostructures;plasmons;BAND-STRUCTURE SO - Solid State Communications 2004 ;130(11):717-722 11331 UI - 5500 AU - Kushwaha MS AU - Sakaki H AD - Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, JapanKushwaha, MS, Univ Autonoma Puebla, Inst Phys, POB J-45, Puebla 72570, Mexico TI - Theory of minigap plasmons in a two-dimensional electron gas subjected to a one-dimensional periodic potential AB - We investigate the plasmon excitations in a two-dimensional (2D) electron gas subjected to a one-dimensional (1D) weak periodic potential. We derive and discuss the dispersion relations for both intrasubband and intersubband excitations within the framework of Bohm-Pines' random-phase approximation. For such an anisotropic system with spatially modulated charge density, we observe a splitting of the 2D plasmon dispersion. The splitting is caused by the superlattice effect of the charge-density modulation on the collective excitation spectrum. Several illustrative examples are presented on the computed plasmon excitation energy as a function of the propagation vector as well as the Bloch vector. We also discuss how the tunneling and the potential amplitude influence the minigaps and the plasmon excitations MH - Japan MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000221426800100 L2 - SUPERLATTICES SO - Physical Review B 2004 ;69(15): 11332 UI - 4423 AU - Kuzmin YV AU - Slusarenko IY AU - Hajdas I AU - Bonani G AU - Christen JA AD - Russian Acad Sci, Far Eastern Branch, Pacific Inst Geog, Vladivostok 690041, RussiaRussian Acad Sci, Siberian Branch, Inst Archaeol & Ethnog, Novosibirsk 630090, RussiaETH Honggerberg, C AMS Lab 14, PSI, CH-8093 Zurich, SwitzerlandETH Honggerberg, Inst Particle Phys, CH-8093 Zurich, SwitzerlandInst Matemat, Morelia 58059, Michoacan, MexicoKuzmin, YV, Russian Acad Sci, Far Eastern Branch, Pacific Inst Geog, Radio St 7, Vladivostok 690041, Russia TI - The comparison of C-14 wiggle-matching results for the 'floating' tree-ring chronology of the Ulandryk-4 burial ground (Altai mountains, Siberia) AB - Two independent C-14 data sets of 10 tree-ring samples from the longest master chronology of the Pazyryk cultural complex were obtained and wiggle-matched to the absolute timescale. The results show very good agreement, within 10-15 calendar yr. The Ulandryk-4 burial ground (mound 1) was dated to about 320-310 cal BC, and this is consistent with wiggle-matching of the Pazyryk burial ground date series MH - Mexico|Michoacan MH - Russia MH - Switzerland PB - TUCSON: UNIV ARIZONA DEPT GEOSCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0033-8222 UR - ISI:000223807300045 SO - Radiocarbon 2004 ;46(2):943-948 11333 UI - 3892 AU - Kvistgaard AS AU - Pallesen LT AU - Arias CF AU - Lopez S AU - Petersen TE AU - Heegaard CW AU - Rasmussen JT AD - Univ Aarhus, Prot Chem Lab, DK-8000 Aarhus C, DenmarkUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet Desarrollo & Fisiol Mol, Cuernavaca 62191, Morelos, MexicoRasmussen, JT, Univ Aarhus, Prot Chem Lab, DK-8000 Aarhus C, Denmark TI - Inhibitory effects of human and bovine milk constituents on rotavirus infections AB - Among etiologic agents, rotavirus is the major cause of severe dehydration diarrhea in infant mammals. In vitro and in vivo studies have indicated that the human milk-fat globule protein lactadherin inhibits rotavirus binding and protects breast-fed children against symptomatic rotavirus infection. The present work was conducted to evaluate the effect of lactadherin, along with some other milk proteins and fractions, on rotavirus infections in MA104 and Caco-2 cell lines. It is shown that human, and not bovine, lactadherin inhibits Wa rotavirus infection in vitro. Human lactadherin seems to act through a mechanism involving protein-virus interactions. The reason for the activity of human lactadherin is not clear, but it might lie within differences in the protein structure or the attached oligosaccharides. Likewise, in our hands, bovine lactoferrin did not show any suppressive activity against rotavirus. In contrast, MUC1 from bovine milk inhibits the neuraminidase-sensitive rotavirus RRV strain efficiently, whereas it has no effect on the neuraminidase-resistant Wa strain. Finally, a bovine macromolecular whey protein fraction turned out to have an efficient and versatile inhibitory activity against rotavirus MH - Denmark MH - Mexico|Morelos PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 12 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000225227800012 L2 - rotavirus;milk fat globule membrane protein;lactoferrin;whey protein;FAT GLOBULES; COWS MILK; LACTADHERIN; REPLICATION; LACTOFERRIN; PROTEIN; DISEASE; PROTECTION; MEMBRANE; DOMAINS SO - Journal of Dairy Science 2004 ;87(12):4088-4096 11334 UI - 3511 AU - Lacasta AM AU - Sancho JM AU - Romero AH AU - Sokolov IM AU - Lindenberg K AD - Univ Politecn Catalunya, Dept Fis Aplicada, E-08028 Barcelona, SpainUniv Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, SpainIPICyT, Adv Mat Dept, San Luis Potosi 78231, MexicoHumboldt Univ, Inst Phys, D-12489 Berlin, GermanyUniv Calif San Diego, Dept Chem & Biochem 0340, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USALacasta, AM, Univ Politecn Catalunya, Dept Fis Aplicada, Avinguda Doctor Maranon 44, E-08028 Barcelona, Spain TI - From subdiffusion to superdiffusion of particles on solid surfaces AB - We present a numerical and partially analytical study of classical particles obeying a Langevin equation that describes diffusion on a surface modeled by a two-dimensional potential. The potential may be either periodic or random. Depending on the potential and the damping, we observe superdiffusion, large-step diffusion, diffusion, and subdiffusion. Superdiffusive behavior is associated with low damping and is in most cases transient, albeit often long. Subdiffusive behavior is associated with highly damped particles in random potentials. In some cases subdiffusive behavior persists over our entire simulation and may be characterized as metastable. In any case, we stress that this rich variety of behaviors emerges naturally from an ordinary Langevin equation for a system described by ordinary canonical Maxwell-Boltzmann statistics MH - Germany MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 19 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000225970500012 L2 - KRAMERS TURNOVER THEORY; LONG JUMPS; CU(001) SURFACE; DIFFUSION; GROWTH; POTENTIALS; DYNAMICS; ATOMS SO - Physical Review e 2004 ;70(5): 11335 UI - 5591 AU - Lacroix PG AU - Padilla-Martinez II AU - Sandoval HL AU - Nakatani K AD - CNRS, Chim Coordinat Lab, F-31077 Toulouse, FranceInst Politecn Nacl, Unidad Profes Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrad, Mexico City 04510, DF, MexicoEcole Normale Super, Lab Photophys & Photochim Supramol & Macromol, CNRS, UMR 8531, F-94235 Cachan, FranceLacroix, PG, CNRS, Chim Coordinat Lab, 205 Route Narbonne, F-31077 Toulouse, France TI - Through space charge transfer and quadratic nonlinear optical (NLO) properties in alternated stacks of 2-amino-1,3-benzothiazoleethylcoumarin-3-carboxylate charge transfer complexes: from the molecular to the bulk NLO response AB - The title compound is a charge transfer complex with an experimental low lying excitation located around 420 nm. It is used as a model compound for the investigation of a possible strategy towards NLO materials obtained by "through space" charge transfer. Its solid state structure (Pc space group) reveals non-centrosymmetric alternating chains of donor-acceptor entities, built from the two independent 2-amino-1,3-benzothiazole entities hydrogen-bonded in the crystal unit cell. Each independent chain gives rise to a one-dimensional charge transfer, and therefore a non-vanishing NLO response along the chain. The angle between the glide mirror and the charge transfer direction is close to the optimized value (61degrees) and leads to two extended lattices of high NLO capability over the whole extent of the crystal. Unfortunately, an angle of 175degrees is observed between the two lattices, because of the unexpected effect of the hydrogen bonding, thus cancelling most of the NLO response. The efficiency of the material is therefore limited to 0.15 times that of urea in second harmonic generation (SHG). Nevertheless, this investigation indicates that charge transfer complexes could be envisioned for an alternative approach to molecular materials with SHG capabilities MH - France MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1144-0546 UR - ISI:000221222800017 L2 - CRYSTAL-STRUCTURES; DESIGN; METAL; PARACYCLOPHANE; DERIVATIVES; SALTS; REDOX; UREA; TCNQ SO - New Journal of Chemistry 2004 ;28(4):542-547 11336 UI - 3773 AU - Ladah LB AU - Zertuche-Gonzalez JA AD - CICESE, Dept Biol Oceanog, San Diego, CA 92143, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22830, Baja California, MexicoLadah, LB, CICESE, Dept Biol Oceanog, Apartado Postal 2732 Ensenada, San Diego, CA 92143 USA TI - Giant kelp (Macrocystis pyrifera) survival in deep water (25-40 m) during El Nino of 1997-1998 in Baja California, Mexico AB - During the 1997-1998 El Nino, we examined seasonally a giant kelp population in deep water (25-40 m) off the coast of Northern Baja California. Though most populations in the region completely disappeared, large fertile adults survived the entire warming event at depth. At 25 m, there was no significant change in density or number of fronds per individual during the warming period from spring 1997 to spring 1998, though the surface canopy sloughed off (died) down to 15 m depth. By summer 1998, recruitment occurred at all depths at the site. Adult survival at depth was most likely important in post-disturbance recovery in surrounding populations by occupying substratum, providing vegetative growth, and producing spores. Survival in deep water during this extreme El Nino may have been due to local hydrography, such as internal waves bringing cool nitrate-rich water into the deeper regions of the shelf from below the thermocline, providing a refugium against the warm temperatures, low nutrients, and heavy wave action associated with warming events. Deep-water populations may regularly survive El Nino warming in this region due to internal wave activity, and go undetected due to the depth at which they occur and the sloughing of the shallow (<15 m) biomass MH - USA MH - Mexico|Baja California PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0006-8055 UR - ISI:000225468300002 L2 - deep water macroalgae;El Nino;ENSO;giant kelp;internal waves;INTERNAL TIDAL BORES; SOUTHERN-CALIFORNIA; MICROSCOPIC FORMS; NORTHEAST PACIFIC; RECRUITMENT; COMMUNITY; FOREST; SPOROPHYTES; DISTURBANCE; DISPERSAL SO - Botanica Marina 2004 ;47(5):367-372 11337 UI - 5136 AU - Lage J AU - Skovmand B AU - Andersen SB AD - CIMMYT, Mexico City 06600, DF, MexicoRoyal Vet & Agr Univ, DK-1871 Frederiksberg C, DenmarkLage, J, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Field evaluation of emmer wheat-derived synthetic hexaploid wheat for resistance to Russian wheat aphid (Homoptera : Aphididae) AB - Broadening the genetic base for resistance to Russian wheat aphid, Diuraphis noxia (Mordvilko) (Homoptera: Aphididae), in bread wheat, Triticum aestivum L., is desirable. To date, identified Russian wheat aphid resistance genes are either located to the D chromosomes or to rye translocation of wheat, and resistance derived from the A or B genomes of tetraploid Triticum spp, would therefore be highly beneficial. Fifty-eight synthetic hexaploid wheat, derived from interspecific crosses of Triticum dicoccum Schrank. and Aegilops tauschii (Coss.) Schmal. and their parents were evaluated for resistance to Russian wheat aphid under field conditions. Plots infested with aphids were compared with plots protected with insecticides. The T. dicoccum parents were highly resistant to Russian wheat aphids, whereas the Ae. tauschii parents were susceptible. Resistance levels observed in the synthetic hexaploids were slightly below the levels of their T. dicoccum parents when a visual damage scale was used, but no major resistance suppression was observed among the synthetics. Russian wheat aphid infestation on average reduced plant height and kernel weight at harvest in the synthetic hexaploids and the T dicoccum parents by 3-4%, whereas the susceptible control 'Seri M82' suffered losses of above 20%. Because resistance in the synthetic hexaploid wheat is derived from their T. dicoccum parent, resistance gene(s) must be located on the A and/or B genomes. They must therefore be different from previously identified Russian wheat aphid resistance genes, which have all been located on the D genome of wheat or on translocated segments MH - Denmark MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000222315200050 L2 - Aegilops tauschii;Diuraphis noxia;resistance evaluation;synthetic hexaploid wheat;Triticum dicoccum;DIURAPHIS-NOXIA RESISTANCE; X T-TAUSCHII; TRITICUM-TURGIDUM; STRIPE RUST; GERMPLASMS RESISTANT; AEGILOPS-SQUARROSA; MONOSOMIC ANALYSIS; YIELD LOSSES; REGISTRATION; SUPPRESSION SO - Journal of Economic Entomology 2004 ;97(3):1065-1070 11338 UI - 5151 AU - Lage J AU - Skovmand B AU - Andersen SB AD - CIMMYT, Mexico City 06600, DF, MexicoRoyal Vet & Agr Univ, DK-1870 Frederiksberg C, DenmarkLage, J, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Resistance categories of synthetic hexaploid wheats resistant to the Russian wheat aphid (Diuraphis noxia) AB - Six Russian wheat aphid (RWA; Diuraphis noxia Mordvilko)-resistant synthetic hexaploid wheats derived from interspecific crosses between Triticum dicoccum Schrank. and Aegilops tauschii (Coss.) Schmal. were evaluated for the three major resistance categories: antibiosis, antixenosis, and tolerance. Aphids on synthetic hexaploids took a significantly longer time to reach maturity than aphids on the susceptible bread wheat control 'Seri M82', but no differences were observed for daily nymph production or intrinsic rate of increase. The antixenosis test showed that the synthetic hexaploids attracted significantly fewer aphids than Seri M82, and pubescent leaves may contribute to the antixenotic properties in these synthetic hexaploids. No significant differences were observed for growth reduction in the tolerance test, although Seri M82 had the highest reduction in the experiment. A plant resistance index revealing differences among the synthetic hexaploid wheats indicates genetic diversity for RWA resistance. The plant resistance index can aid plant breeders in selecting the best germplasm for incorporating Russian wheat aphid resistance into elite bread wheat lines. Of the synthetic hexaploids, CWI 76621 and CWI 76629 showed the highest levels of resistance overall, and are thus potential candidates for Russian wheat aphid resistance breeding MH - Denmark MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000222236000007 L2 - pubescence;resistance categories;Russian wheat aphid;synthetic hexaploid wheat;GERMPLASMS RESISTANT; AEGILOPS-SQUARROSA; MONOSOMIC ANALYSIS; TRITICUM-TAUSCHII; PLANT-RESISTANCE; LEAF PUBESCENCE; T-TAUSCHII; HOMOPTERA; REGISTRATION; IMPROVEMENT SO - Euphytica 2004 ;136(3):291-296 11339 UI - 3679 AU - Laine B AU - Rivera-Rodrigues C AU - Morales-Sanchez E AU - Prokhorov E AU - Trapaga G AU - Gonzalez-Hernandez J AD - IPN, CINVESTAV, Unidad Queretaro, Libramiento Norponiente 2000, Queretaro 76230, MexicoInst Natl Sci Appl, F-69621 Villeurbanne, FranceProkhorov, E, IPN, CINVESTAV, Unidad Queretaro, Libramiento Norponiente 2000, Fracc Real Juriquilla, Queretaro 76230, Mexico TI - Isothermal phase transformation kinetics in stoichiometric GeSbTe thin films AB - The purpose of this work is to investigate the isothermal phase transformation in thin films of Ge2Sb2Te5 and Ge1Sb2Te4 alloys. From experimental and computed simulations it was shown that if the kinetic behavior is interpreted employing the Johnson-Avrami-Mehl-Kolmogorov theory, three slopes can be observed: the first related to a metastable transformation, the second to the step between metastable and stable transformation, and the last to the stable phase nucleation and growth. From X-ray patterns it was found that a metastable phase, which appears during the beginning of crystallization for Ge2Sb2Te5 and Ge1Sb2Te4 thin films, corresponds to the Ge1Sb4Te7 fcc composition. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000225583200033 L2 - JOHNSON-MEHL; CRYSTALLIZATION; KOLMOGOROV; GROWTH SO - Journal of Non-Crystalline Solids 2004 ;345-46():173-177 11340 UI - 3856 AU - Lamas-Maceiras M AU - Cerdan ME AU - Lloret A AU - Freire-Picos MA AD - Univ A Coruna, Fac Ciencias, Dpto Biol Celular & Mol, La Coruna 15071, SpainUNAM, Inst Fisiol Celular, Dpto Genet Mol, Mexico City, DF, MexicoFreire-Picos, MA, Univ A Coruna, Fac Ciencias, Dpto Biol Celular & Mol, Campus A Zapateira S-N, La Coruna 15071, Spain TI - Characterization of a gene similar to BIK1 in the yeast Kluyveromyces lactis AB - In Saccharomyces cerevisiae, Bik1p is a microtubule plus-end-tracking protein that plays several roles in mitosis and ploidy. KIBik1p (from Kluyveromyces lactis) maintains the same structural-domain organization as does S. cerevisiae Bik1p. As part of its characterization, we constructed a stable klbik1 mutant which is sensitive to benomyl only at 14 degreesC and has a higher frequency of crescent-shaped nuclei than S. cerevisiae NO mutants. This phenotype is partially rescued by S. cerevisiae BIK1. Other phenotypes associated with bik1 are not present in the K. lactis mutant. By fusion to GFP we were able to show the functionality of the KIBik1p CAP-Gly domain and found that the fusion protein changes its cellular location during the cell cycle. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Distrito Federal MH - Spain PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Microbiology;Mycology U5 - J;Article AV - English IS - 0749-503X UR - ISI:000225001300001 L2 - yeast;cell cycle;Kluyveromyces;BIK1;KINETOCHORE-MICROTUBULE ATTACHMENT; SACCHAROMYCES-CEREVISIAE; SHUTTLE VECTORS; BUDDING YEAST; PROTEINS; DNA; DYNAMICS SO - Yeast 2004 ;21(13):1067-1075 11341 UI - 5826 AU - Lamboy WF AU - Moreno-Hagelsieb G AD - USDA ARS, Cornell Univ, Cornell theory Ctr, Ctr Agr Bioinformat, Ithaca, NY 14853, USAUNAM, CIFN, Program Computat Genom, Cuernavaca 62100, Morelos, MexicoLamboy, WF, USDA ARS, Cornell Univ, Cornell theory Ctr, Ctr Agr Bioinformat, Rhodes Hall, Ithaca, NY 14853 USA TI - A new method of solution for the occupancy problem and its application to operon size prediction AB - The problem of estimating the expected number of transcription units containing a specific number of genes arises in the context of operon size prediction in prokaryotic genomes, where operons are defined to be transcription units containing two or more genes. It turns out that this problem is identical mathematically to the balls in urns occupancy problem in probability theory. In that problem, a fixed number of indistinguishable balls are randomly placed in a known number of distinguishable urns, subject to the restriction that no urns may remain empty, and an estimate is desired for the expected number of urns containing a specific number of balls. In this paper we present a new simple technique for solving the occupancy problem when empty urns are allowed and extend it to the case when each urn must contain the same non-zero minimum number of balls. Treating transcription units as equivalent to urns, and genes as equivalent to balls, we then use that result to solve the problem of estimating the expected number of transcription units that contain a specific number of genes, and then apply that result to predicting the expected number of transcription units present in an entire genome. Since these predictions can be made for any completely sequenced and annotated prokaryotic genome, they provide a starting point for the comparison of regulatory complexity across such genomes. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000220513700002 L2 - directon;operon;occupancy problem;transcription unit;urn model SO - Journal of Theoretical Biology 2004 ;227(3):315-322 11342 UI - 3419 AU - Landa-Habana L AU - Pina-Hernandez A AU - gama-Acevedo E AU - Tovar J AU - Bello-Perez LA AD - IPN, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041A, VenezuelaBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, Km 8-5 Carr Yautepec Jojutla,Colonia San Isidro,A, Yautepec 62731, Morelos, Mexico TI - Effect of cooking procedures and storage on starch bioavailability in common beans (Phaseolus vulgaris L.) AB - Common commercial beans were cooked Using two procedures: under pressure (autoclaving) and traditional cooking. Total starch extraction was higher in beans cooked with the traditional procedure (41.69-42.81%) than in the autoclaved samples (37.04-38.16%) and did not change during storage at 4degreesC. However, available and total resistant starch levels in vitro were not influenced by the cooking procedure or storage. Retrograded resistant starch content was higher in beans cooked with the traditional process (2.65-2.79%) than in autoclaved beans (1.62-1.94%). The initial in vitro alpha-amylolysis rate in freshly cooked beans was higher in the autoclaved preparation than in the beans cooked by the traditional process, but final hydrolysis indices (90 min) were similar for both samples. None of the bean samples showed statistical differences in alpha-amylolysis behavior (alpha = 0.05) after storage at 4degreesC for 96 hour MH - Mexico|Morelos MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences;Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0921-9668 UR - ISI:000226152300001 L2 - beans;legumes;starch;starch hydrolysis rate;resistant starch;IN-VITRO DIGESTIBILITY; RESISTANT STARCH; GLYCEMIC INDEX; STEAM-COOKING; BLOOD-GLUCOSE; INDIAN PULSES; LEGUMES; AVAILABILITY; DIGESTION; FOODS SO - Plant Foods for Human Nutrition 2004 ;59(4):133-136 11343 UI - 4366 AU - Lang IG AU - Pavlov ST AU - Korovin LI AD - Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, RussiaUAZ, Fac Fis, Zacatecas 8060, MexicoRussian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, RussiaLang, IG, Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia TI - Theory of reflection and absorption of light by low-dimensional semiconductor objects in a strong magnetic field under monochromatic and pulsed excitations AB - The theoretical principles of reflection and absorption of light by low-dimensional semiconductor objects (quantum wells, quantum wires, quantum dots) under monochromatic and pulsed excitations with an arbitrary pulse shape are developed. A semiconductor object can be placed in a strong constant magnetic field. The normal incidence of light on a quantum well whose width can be comparable to the light wavelength and for which the number of levels of electronic excitations can be arbitrary is considered as an example. An integral equation similar to the Dyson equation is derived for the Fourier components of the electric fields. The solutions to this equation are given for a number of special cases. (C) 2004 MAIK "Nauka/Interperiodica" MH - Mexico|Zacatecas MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1063-7834 UR - ISI:000224053800029 L2 - MULTIPLE-QUANTUM WELLS; EXCITONS; PENETRATION; DISPERSION SO - Physics of the Solid State 2004 ;46(9):1761-1775 11344 UI - 4242 AU - Lange H AU - Recillas S AD - Math Inst, D-91054 Erlangen, GermanyUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoCIMAT, Valenciana 36000, Gto, MexicoLange, H, Math Inst, Bismarckstr 1 1-2, D-91054 Erlangen, Germany TI - Abelian varieties with group action AB - A finite group G acting on an abelian variety A induces a decomposition of A up to isogeny. In this paper we investigate several aspects of this decomposition. We apply the results to the decomposition of the Jacobian variety of a smooth projective curve with G-action. The aim is to express the decomposition in terms of the G-action of the curve. As examples of the results we work out the decompositions of Jacobians with an action of the symmetric group of degree 4, the alternating group of degree 5, the dihedral groups of order 2p and 4p, and the quaternion group MH - Germany MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0075-4102 UR - ISI:000224342600006 L2 - SHEAVES; COVER SO - Journal fur Die Reine und Angewandte Mathematik 2004 ;575():135-155 11345 UI - 5014 AU - Lange H AU - Recillas S AD - Univ Erlangen Nurnberg, Math Inst, D-91054 Erlangen, GermanyInst Matemat, Morelia 58089, Michoacan, MexicoCIMAT, Valenciana 36000, Gto, MexicoLange, H, Univ Erlangen Nurnberg, Math Inst, Bismarckstr 1 1-2, D-91054 Erlangen, Germany TI - Prym varieties of pairs of coverings AB - The Prym variety of a pair of coverings is defined roughly speaking as the complement of the Prym variety of one morphism in the Prym variety of another morphism. We show that this definition is symmetric and give conditions when such a Prym variety is isogenous to an ordinary Prym variety or to another such Prym variety. Moreover in order to show that these varieties actually occur we compute the isogeny decomposition of the Jacobian variety of a curve with an action of the symmetric group S-5 MH - Germany MH - Mexico|Guanajuato MH - Mexico|Michoacan PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 1615-715X UR - ISI:000222555600006 L2 - Prym variety;group action SO - Advances in Geometry 2004 ;4(3):373-387 11346 UI - 4102 AU - Langer A AU - az-Olavarrieta C AU - Berdichevsky K AU - Villar J AD - Populat Council, Reg Off Latin Amer & Caribbean, Mexico City 04000, DF, MexicoWHO, Dept Reprod Hlth & Res Family & Community Hlth, Geneva, SwitzerlandLanger, A, Populat Council, Reg Off Latin Amer & Caribbean, Panzacola 62-102,Coyoacan, Mexico City 04000, DF, Mexico TI - Why is research from developing countries underrepresented in international health literature, and what can be done about it? MH - Mexico|Distrito Federal MH - Switzerland PB - GENEVA 27: WORLD HEALTH ORGANIZATION RP - NOT IN FILE U3 - TC 4 U4 - Public, Environmental & Occupational Health U5 - J;Editorial Material AV - English IS - 0042-9686 UR - ISI:000224661600023 L2 - INFORMATION SO - Bulletin of the World Health Organization 2004 ;82(10):802-803 11347 UI - 6228 AU - Laniado-Laborin R AU - Candelaria JI AU - Villasenor A AU - Woodruff SI AU - Sallis JF AD - San Diego State Univ, Grad Sch Publ Hlth, Ctr Behav & Community Hlth Studies, San Diego, CA 92123, USASan Diego State Univ, Dept Psychol, San Diego, CA 92123, USAUniv Autonoma Baja California, Fac Med Tijuana, Mexicali 21100, Baja California, MexicoLaniado-Laborin, R, San Diego State Univ, Grad Sch Publ Hlth, Ctr Behav & Community Hlth Studies, 9245 Sky Pk Court,Suite 221, San Diego, CA 92123 USA TI - Concordance between parental and children's reports of parental smoking prompts AB - Study objectives: To describe the prevalence of parental prompting to smoke (eg, parent requests that their child light the parent's cigarette in his/her own mouth) in a sample of families, and to assess the agreement between child and parent reports of the prompting behaviors. Design, setting, and participants: A total of 3,624 adolescents from 10 middle/junior high schools completed baseline surveys. Parents identified as smokers in these surveys were contacted to complete a telephone survey. These analyses included 270 parent/child pairs. Fifty-one percent of parents were Latino American, 51% had the equivalent of a high-school diploma, 83% were employed when surveyed, and the median household monthly income was between $2,200 and $2,599. Measurements and results: Students completed a paper-and-pencil survey assessing demographic characteristics, seven parental prompts to smoke, past month smoking, parental smoking, acculturation, and familism. A similar questionnaire was developed to collect information by telephone from smoking parents. Concordance between child- and parent-reported prompting was > 85% for five of seven prompts. However, the reported prevalence of six of the seven prompts was lower among parents than children. Thirty-two percent of mothers and 17% of fathers reported prompting their children to bring cigarettes to parents (the most common prompt). Students reported that 62% of their mothers and 54% of their fathers prompted them to bring their cigarettes, a substantial discrepancy in both cases. Conclusions: Child-reported prompting prevalence was consistently higher than parents' reports, with the biggest discrepancies between requests to clean ashtrays and bring cigarettes, the two most common prompts. In subsequent studies of parental prompting, it is advisable to collect data from both children and parents and to validate the accuracy of the sources MH - USA MH - Mexico|Baja California PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 0 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000188978400014 L2 - adolescents;culture;family;Latino Americans;parents;smoking;BEHAVIOR CHECKLIST; CIGARETTE-SMOKING; ACCULTURATION; ADOLESCENTS; AGREEMENT; FAMILISM SO - Chest 2004 ;125(2):429-434 11348 UI - 4576 AU - Lanphear B AU - Hornung R AU - Khoury J AU - Yolton K AU - Baghurst P AU - Bellinger D AU - Bornschein R AU - Canfield R AU - Dietrich K AU - Graziano J AU - Needleman H AU - Roberts R AU - Rothenberg S AU - Schnaas L AU - Wasserman G AD - Cincinnati Childrens Hosp, Med Ctr, Cincinnati Childrens Environm Hlth Ctr, Cincinnati, OH, USAUniv Cincinnati, Dept Environm Hlth, Cincinnati, OH 45221, USACommonwealth Sci Res Org, Adelaide, SA, AustraliaBoston Childrens Hosp, Boston, MA, USACornell Univ, Ithaca, NY 14853, USAColumbia Univ, New York, NY 10027, USAUniv Pittsburgh, Pittsburgh, PA 15260, USAGriffith Univ, Nathan, Qld 4111, AustraliaDrew Univ, Los Angeles, CA, USANatl Inst Perinatol, Mexico City, DF, Mexico TI - Low-level environmental lead exposure and intellectual impairment in children: An international pooled analysis MH - Australia MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591100951 SO - Pediatric Research 2004 ;55(4):163A-163A 11349 UI - 3408 AU - Lanson B AU - Manceau A AU - Villalobos M AU - Toner B AU - Sposito G AD - Univ Grenoble, LGIT, CNRS, Environm Geochem Grp, F-38041 Grenoble 9, FranceUniv Calif Berkeley, Div Ecosyst Sci, Berkeley, CA 94720, USAUNAM, Inst Geog, Environm Biogeochem Grp, Mexico City, DF, Mexico TI - Structure determination of highly defective layer Mn oxides: Case study of the biogenic Mn oxide produced by Pseudomonas putida MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655604019 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U1217-U1217 11350 UI - 3786 AU - Laplagne DA AU - Zylberman V AU - Ainciart N AU - Steward MW AU - Sciutto E AU - Fossati CA AU - Goldbaum FA AD - Univ Buenos Aires, Consejo Nacl Invest Cient & Tecn, Fdn Inst Leloir, RA-1405 Buenos Aires, DF, ArgentinaUniv Buenos Aires, Fac Ciencias Exactas & Nat, Fdn Inst Leloir, RA-1405 Buenos Aires, DF, ArgentinaLondon Sch Hyg & Trop Med, London WC1, EnglandUNAM, Inst Invest Biomed, Dept Inmunol, Mexico City, DF, MexicoUniv Buenos Aires, CONICET, IDEHU,Fac Farm & Bioquim, Inst Esdudios Inmunidad Humoral, RA-1405 Buenos Aires, DF, ArgentinaGoldbaum, FA, Univ Buenos Aires, Consejo Nacl Invest Cient & Tecn, Fdn Inst Leloir, Av Patricias Argentinas 435, RA-1405 Buenos Aires, DF, Argentina TI - Engineering of a polymeric bacterial protein as a scaffold for the multiple display of peptides AB - Protein assemblies with a high degree of repetitiveness and organization are known to induce strong immune responses. For that reason they have been postulated for the design of subunit vaccines by means of protein engineering. The enzyme lumazine synthase from Brucella spp. (BLS) is highly immunogenic, presumably owing to its homodecameric arrangement and remarkable thermodynamic stability. Structural analysis has shown that it is possible to insert foreign peptides at the ten amino terminus of BLS without disrupting its general folding. These peptides would be displayed to the immune system in a highly symmetric three-dimensional array. In the present work, BLS has been used as a protein carrier of foreign peptides. We have established a modular system to produce chimeric proteins decorated with ten copies of a desired peptide as long as 27 residues and have shown that their folding and stability is similar to that of the wild-type protein. The knowledge about the mechanisms of dissociation and unfolding of BLS allowed the engineering of polyvalent chimeras displaying different predefined peptides on the same molecular scaffold. Moreover, the reassembly of mixtures of chimeras at different steps of the unfolding process was used to control the stoichiometry and spatial arrangement for the simultaneous display of different peptides on BLS. This strategy would be useful for vaccine development and other biomedical applications. (C) 2004 Wiley-Liss, Inc MH - Argentina MH - United Kingdom MH - Mexico|Distrito Federal PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 14 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0887-3585 UR - ISI:000225351100019 L2 - immunogenicity;stability;chimeric protein;decamer;polyvalent chimeras;multiple display of peptides;TOXIN B-SUBUNIT; LUMAZINE SYNTHASE; BRUCELLA-ABORTUS; MONOCLONAL-ANTIBODIES; CHOLERA-TOXIN; CYTOPLASMIC PROTEIN; MULTIENZYME COMPLEX; SYNTHETIC PEPTIDE; FUSION PROTEIN; EXPRESSION SO - Proteins-Structure Function and Bioinformatics 2004 ;57(4):820-828 11351 UI - 4119 AU - Lara-Cabrera SI AU - Spooner DM AD - UMSNH, Fac Biol, Morelia 58066, Michoacan, MexicoUniv Wisconsin, Dept Hort, USDA ARS, Madison, WI 53706, USALara-Cabrera, SI, UMSNH, Fac Biol, Edif R Ciudad Univ,Francisco J Mujica S-N,Col Fel, Morelia 58066, Michoacan, Mexico TI - Taxonomy of North and Central American diploid wild potato (Solanum sect. Petota) species: AFLP data AB - Solanum section Petota, the potato and its wild relatives, includes about 200 wild species distributed from the southwestern United States to central Argentina and adjacent Chile, with about 30 species in North and Central America. The North/Central American region and the South American region all include diploids, tetraploids, and hexaploids. Chloroplast DNA restriction enzyme data from a prior study showed that 13 of the North/Central American species formed a clade containing only diploids, but there was low resolution within the clade. This Amplified Fragment Length Polymorphism (AFLP) study is conducted to provide additional resolution within the North/Central American diploids and complements the chloroplast results, and prior morphological results. Wagner parsimony and phenetic analyses mostly agreed with the morphological data in supporting currently recognized species except that they suggest that S. brachistotrichium and S. stenophyllidium are conspecific. Our new AFLP data, it! combination with the cpDNA and morphological data, also support sister taxon relationships for the following diploid species from North and Central America: 1) S. cardiophyllum subsp. ehrenbergii and S. stenophyllidium, 2) S. tarnii and S. trifidum, 3) S. jamesii and S. pinnatisectum, 4) S. lesteri and S. polyadenium, and 5) S. clarum and S. morelliforme MH - Mexico|Michoacan MH - USA PB - VIENNA: SPRINGER WIEN RP - NOT IN FILE U3 - TC 10 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0378-2697 UR - ISI:000224527100008 L2 - AFLP;molecular phylogeny;potato;Solanum sect. Petota;systematics;taxonomy;RESTRICTION SITE VARIATION; SERIES LONGIPEDICELLATA; GENETIC-RELATIONSHIPS; S-CARDIOPHYLLUM; SOLANACEAE; GERMPLASM; REEXAMINATION; BULBOCASTANUM; SYSTEMATICS; CONFIDENCE SO - Plant Systematics and Evolution 2004 ;248(1-4):129-142 11352 UI - 5233 AU - Lara KO AU - Godoy-Alcantar C AU - Eliseev AV AU - Yatsimirsky AK AD - SUNY Buffalo, Dept Med Chem, Buffalo, NY 14260, USAUniv Sonora, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoEliseev, AV, SUNY Buffalo, Dept Med Chem, Buffalo, NY 14260, USA TI - Recognition of alpha-amino acid derivatives by N,N '-dibenzylated S,S-(+)-tetrandrine AB - Complexation of free and N-acetylated alpha-amino acid anions (Gly, Ala, Phe) and some structurally related guests by a dicationic cyclophane-type N,N'-dibenzylated chiral derivative of a bisisoquinoline macrocyclic alkaloid S,S-(+)-tetrandrine (DBT) has been studied by H-1-NMR titrations in D2O. In contrast to other macrocyclic hosts like cyclodextrins and calixarenes, DBT shows highest affinity and large enantioselectivity (K(S)/K(R) = 10) toward smaller N-acetylalanine and binds larger phenylalanine derivatives more weakly and non-selectively. With 1,2,3,4-tetrahydroisoquinoline-3-carboxylate, a rigid analog of phenylalanine, binding again becomes enantioselective with K(S)/K(R) = 3.8. The binding specificity of DBT is rationalized on the basis of molecular mechanics calculations MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Sonora MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1477-0520 UR - ISI:000221908100008 L2 - NUCLEAR-MAGNETIC-RESONANCE; MOLECULAR RECOGNITION; CHIRAL RECOGNITION; BETA-CYCLODEXTRIN; AQUEOUS-SOLUTION; ENANTIOSELECTIVE RECOGNITION; RECEPTORS; DISCRIMINATION; COMPLEXATION; MACROCYCLES SO - Organic & Biomolecular Chemistry 2004 ;2(12):1712-1718 11353 UI - 6308 AU - Lara M AU - Servin-Gonzalez L AU - Singh M AU - Moreno C AU - Cohen I AU - Nimtz M AU - Espitia C AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Biomed, Dept Mol Biol, Mexico City 04510, DF, MexicoGerman Natl Res Ctr Biotechnol Braunschweig, GBF, D-38124 Braunschweig, GermanyRoyal Free & Univ Coll Med Sch, Windeyer Inst, Dept Bacteriol, London W1P 6DB, EnglandEspitia, C, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Apartado Postal 70-228, Mexico City 04510, DF, Mexico TI - Expression, secretion, and glycosylation of the 45-and 47-kDa glycoprotein of Mycobacterium tuberculosis in Streptomyces lividans AB - The gene encoding the 45/47 kDa glycoprotein (Rv1860) of Mycobacterium tuberculosis was expressed in Streptomyces lividans under its own promoter and under the thiostrepton-inducible Streptomyces promoter P-tipA. The recombinant protein was released into the culture medium and, like the native protein, migrated as a double band at 45 and 47 kDa in sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis (PAGE) gels. However, in contrast to the native protein, only the 47-kDa recombinant protein could be labeled with concanavalin A (ConA). Carbohydrate digestion with jack bean alpha-D-mannosidase resulted in a reduction in the molecular mass of the recombinant protein upper band and completely eliminated ConA binding. Two-dimensional gel electrophoresis revealed only one isoelectric point for the recombinant protein. Comparative fingerprinting analysis of the individually purified upper and lower recombinant protein bands, treated under the same conditions with specific proteases, resulted in similar peptide patterns, and the peptides had the same N-terminal sequence, suggesting that migration of the recombinant protein as two bands in SDS-PAGE gels could be due to differences in glycosylation. Mass spectrometry analysis of the recombinant protein indicated that as in native protein, both the N-terminal and C-terminal domains of the recombinant protein are glycosylated. Furthermore, it was determined that antibodies of human tuberculosis patients reacted mainly against the carbohydrate residues of the glycoprotein. Altogether, these observations show that expression of genes for mycobacterial antigens in S. lividans is very useful for elucidation of the functional role and molecular mechanisms of glycosylation in bacteria MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000188854900006 L2 - MANNOSE RECEPTOR; DC-SIGN; HETEROLOGOUS EXPRESSION; SELECTIVE RECOGNITION; CELLULOMONAS-FIMI; PROTEIN SECRETION; ANTIGEN; RESPONSES; PURIFICATION; FIBRONECTIN SO - Applied and Environmental Microbiology 2004 ;70(2):679-685 11354 UI - 4877 AU - Largeteau ML AU - Mata G AU - Savoie JM AD - INRA, Unite Mycol & Secur Aliments, F-33883 Villenave Dornon, FranceInst Ecol, Dept Hongos, Xalapa, Veracruz, MexicoLargeteau, ML, INRA, Unite Mycol & Secur Aliments, BP 81, F-33883 Villenave Dornon, France TI - Verticillium fungicola var. fungicola affects Agaricus bisporus cultivation in Mexico AB - Verticillium fungicola is responsible for dry bubble disease of the button mushroom Agaricus bisporus. Investigations performed in 2001 showed that mushroom cultures were affected by V. fungicola var. aleophilum in North American farms whereas they were affected by V. fungicola var. fungicola in European farms. The latter variety was not found in North America. Studies carried out on Verticillium isolates collected in Mexico in 2002 revealed that they belong to the variety fungicola. The hypothesis of the introduction of the variety fungicola from Europe through the import of material or machines used for mushroom cultivation is proposed. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - France MH - Mexico|Veracruz PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Microbiology U5 - J;Article AV - English IS - 0378-1097 UR - ISI:000222871800004 L2 - origin;molecular identification;Verticillium fungicola;DRY BUBBLE DISEASE; BUTTON MUSHROOM; PATHOGENICITY; TAXONOMY SO - Fems Microbiology Letters 2004 ;236(2):191-196 11355 UI - 5770 AU - Larraga ME AU - del Rio JA AU - Schadschneider A AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Cologne, Inst Theoret Phys, D-50937 Cologne, GermanyLarraga, ME, UNAM, Ctr Invest Energia, AP 34, Temixco 62580, Morelos, Mexico TI - New kind of phase separation in a CA traffic model with anticipation AB - A cellular automaton model of traffic flow taking into account velocity anticipation is introduced. The strength of anticipation can be varied to describe different driving schemes. We find a new phase separation into a free-flow regime and a so-called upsilon-platoon in an intermediate density regime. In a upsilon-platoon all cars move with velocity upsilon and have vanishing headway. The velocity upsilon of a platoon only depends on the strength of anticipation. At high densities, a congested state characterized by the coexistence of a 0-platoon with several upsilon-platoons is reached. The results are not only relevant for automated highway systems, but also help to elucidate the effects of anticipation that play an essential role in realistic traffic models. From a physics point of view the model is interesting because it exhibits phase separation with a condensed phase in which particles move coherently with finite velocity coexisting with either a non-condensed (free-flow) phase or another condensed phase that is non-moving MH - Germany MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000220627200008 L2 - NAGEL-SCHRECKENBERG-MODEL; CELLULAR-AUTOMATON MODEL; STATISTICAL PHYSICS; FLOW; SYSTEMS; SIMULATION SO - Journal of Physics A-Mathematical and General 2004 ;37(12):3769-3781 11356 UI - 5469 AU - Larrion F AU - de Mello CP AU - Morgana A AU - Neumann-Lara V AU - Pizana MA AD - UNAM, Inst Matemat, Mexico City, DF, MexicoUNICAMP, Inst Computacao, Campinas, SP, BrazilUniv Roma La Sapienza, Dipartimento Matemat, I-00185 Rome, ItalyUAM 1, Dept Ingn Elect, Mexico City, DF, MexicoLarrion, F, UNAM, Inst Matemat, Mexico City, DF, Mexico TI - The clique operator on cographs and serial graphs AB - The clique graph of a graph G is the intersection graph K(G) of the (maximal) cliques of G. The iterated clique graphs K-n(G) are defined by K-0(G) = G and K-i(G) = K(Ki-1(G)), i > 0 and K is the clique operator. A cograph is a graph with no induced subgraph isomorphic to P-4. In this article we use the modular decomposition technique to characterize the K-behaviour of cographs and to give some partial results for the larger class of serial (i.e. complement-disconnected) graphs. We prove that a cograph is K-convergent if and only if it is clique-Helly. This characterization leads to a polynomial time algorithm for deciding the K-convergence or K-divergence of any cograph. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000221634100018 L2 - iterated clique graphs;clique divergence;modular decompositions;cographs;CHORDAL GRAPHS; HELLY GRAPHS; ALGORITHMS; DIVERGENT SO - Discrete Mathematics 2004 ;282(1-3):183-191 11357 UI - 5470 AU - Larrion F AU - Neumann-Lara V AU - Pizana MA AU - Porter TD AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Elect, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoSo Illinois Univ, Dept Math, Carbondale, IL 62901, USAPizana, MA, Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Elect, Av San Rafael Atlixco 186, Mexico City 09340, DF, Mexico TI - A hierarchy of self-clique graphs AB - The clique graph K(G) of G is the intersection graph of all its (maximal) cliques. A connected graph G is self-clique whenever G congruent to K(G). Self-clique graphs have been studied in several papers. Here we propose a hierarchy of self-clique graphs: Type 3 subset of or equal to Type 2 subset of or equal to Type 1 subset of or equal to Type 0. We give characterizations for classes of Types 3, 2 and 1 (including Helly self-clique graphs) and several new constructions of families of self-clique graphs. It is shown that all (but one) previously published examples of self-clique graphs are of Type 2. Our methods provide a unified approach and generalizations of those examples. As further applications, we give a characterization of the self-clique graphs such that at most 3 cliques have more than two vertices (they are all of Type 2) and a description of the diamond-free graphs of Type 2. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Mathematics U5 - J;Article AV - English IS - 0012-365X UR - ISI:000221634100019 L2 - self-clique graphs;clique Helly graphs;vertex-clique bipartite graph;DIVERGENT GRAPHS; LINEAR GROWTH; DIAMETERS SO - Discrete Mathematics 2004 ;282(1-3):193-208 11358 UI - 5555 AU - Larson KM AU - Lowry AR AU - Kostoglodov V AU - Hutton W AU - Sanchez O AU - Hudnut K AU - Suarez G AD - Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309, USAUniv Colorado, Dept Phys, Boulder, CO 80309, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoHutton Consulting, Seattle, WA, USAUS Geol Survey, Pasadena, CA 91106, USALarson, KM, Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309, USA TI - Crustal deformation measurements in Guerrero, Mexico AB - [1] GPS measurements of crustal deformation in Guerrero, southern Mexico, include surveys collected between 1992 and 2001 as well as continuous GPS measurements at a few sites. These geodetic observations are used to calculate interseismic deformation rates and assess the presence and possible location of transient deformation during the period encompassing 1992.25 to 2001.75. The data are used to examine transient deformation in 1998 previously described from data at a single site by Lowry et al. [2001]. Survey measurements and continuous data from a site near Popocatepetl volcano confirm the 1998 transient, and survey data also suggest another transient occurred following the 14 September 1995 (M-w = 7.3) Copala earthquake. All of the available GPS position estimates have been inverted for a combined model of slip during each event plus the steady state slip on the plate interface. Modeling of the steady state deformation rates confirms that the Guerrero seismic gap is partially frictionally locked at depths shallower than about 25 km and accumulating strain that may eventually be released in a great earthquake. The data also suggest that there is frictional coupling to much greater (> 40 km) depths, which releases more frequently in aseismic slip events. The locations and sizes of the transient events are only partially constrained by the available data. However, the transient models which best fit the GPS coordinate time series suggest that aseismic slip was centered downdip of the seismogenic portion of the plate-bounding thrust in both events, and the moment release had equivalent magnitudes M-w = 7.1+1.3/-1.0 in 1995-1996 and 7.1 + 0.4/-0.1 in 1998 MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 13 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000221325800002 L2 - transient deformation;GPS;Guerrero;GLOBAL POSITIONING SYSTEM; SUBDUCTION ZONE; STRAIN ACCUMULATION; TECTONIC IMPLICATIONS; SEISMIC GAP; DISLOCATION MODEL; SEISMOGENIC ZONE; GPS MEASUREMENTS; SOUTHERN MEXICO; SLIP EVENT SO - Journal of Geophysical Research-Solid Earth 2004 ;109(B4): 11359 UI - 3951 AU - Laska M AU - Salazar LTH AD - Univ Munich, Sch Med, Dept Med Psychol, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuro Etol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Med Psychol, Goethestr 31, D-80336 Munich, Germany TI - Gustatory responsiveness to monosodium glutamate and sodium chloride in four species of nonhuman primates AB - The taste responsiveness of six squirrel monkeys, five pigtail macaques, four olive baboons and four spider monkeys to monsodium glutamate (MSG) and to sodium chloride was assessed in two-bottle preference tests of brief duration (2 min). When given the choice between tap water and defined concentrations of the two tastants dissolved in tap water, the animals were found to significantly discriminate concentrations of MSG as low as 2 mM (spider monkeys and olive baboons), 50 mM (pigtail macaques) and 300 mM (squirrel monkeys) from the solvent. With sodium chloride, taste preference thresholds were found to be 1 mM (spider monkeys), 20 mM (pigtail macaques), 50 mM (olive baboons), and 200 mM (squirrel monkeys), respectively. Across-species comparisons of the degree of preference for MSG and sodium chloride displayed by the four primate species showed the same order of spider monkeys>olive baboons>pigtail macaques>squirrel monkeys. When presented with equimolar concentrations of different tastants, all four species preferred sucrose as well as a mixture of sucrose and sodium chloride over MSG, and - at least at one concentration - they preferred MSG over sodium chloride. The results support the assertion that the taste responsiveness of the four primate species to MSG and sodium chloride might reflect an evolutionary adaptation to their respective dietary habits. (C) 2004 Wiley-Liss, Inc MH - Germany MH - Mexico|Veracruz PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-104X UR - ISI:000224907400006 L2 - FOOD-ASSOCIATED SUGARS; TASTE DIFFERENCE THRESHOLDS; MONKEY SAIMIRI-SCIUREUS; ATELES-GEOFFROYI; AMINO-ACIDS; PREFERENCES; UMAMI; RATS; DISCRIMINATION; RESPONSES SO - Journal of Experimental Zoology Part A-Comparative Experimental Biology 2004 ;301A(11):898-905 11360 UI - 6063 AU - Laska M AU - Wieser A AU - Bautista RMR AU - Salazar LTH AD - Univ Munich, Sch Med, Dept Psychol Med, D-80336 Munich, GermanyUniv Veracruzana, Inst Neuroetol, Xalapa 91000, Veracruz, MexicoLaska, M, Univ Munich, Sch Med, Dept Psychol Med, Goethestr 31, D-80336 Munich, Germany TI - Olfactory sensitivity for carboxylic acids in spider monkeys and pigtail macaques AB - Using a conditioning paradigm, the olfactory sensitivity of four spider monkeys and four pigtail macaques for a homologous series of carboxylic acids (n-propionic acid to n-heptanoic acid) was investigated. With only few exceptions, the animals of both species significantly discriminated concentrations <1 p.p.m. from the odorless solvent and in several cases individual monkeys even demonstrated thresholds <1 p.p.b. The results showed (i) both primate species to have a well-developed olfactory sensitivity for carboxylic acids, which for some substances matches or even is markedly better than that of species such as the rat or the dog and (ii) a significant correlation between perceptibility in terms of olfactory detection thresholds and carbon chain length of the carboxylic acids in both species tested. These findings lend further support to the growing body of evidence suggesting that between-species comparisons of the number of functional olfactory receptor genes or of neuroanatomical features are poor predictors of olfactory performance, and that general labels such as 'microsmat' or 'macrosmat'-which usually are based on allometric comparisons of olfactory brain structures-are inadequate to describe a species' olfactory capabilities MH - Germany MH - Mexico|Veracruz PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 13 U4 - Behavioral Sciences;Food Science & Technology;Neurosciences;Physiology U5 - J;Article AV - English IS - 0379-864X UR - ISI:000220059200002 L2 - carboxylic acids;detection thresholds;nonhuman primates;olfactory sensitivity;SQUIRREL-MONKEYS; SAIMIRI-SCIUREUS; ALIPHATIC ESTERS; ATELES-GEOFFROYI; NASAL PUNGENCY; ODOR; ALDEHYDES; PRIMATES; RECEPTOR; ABILITY SO - Chemical Senses 2004 ;29(2):101-109 11361 UI - 4420 AU - Lastras-Martinez LF AU - Balderas-Navarro RE AU - Lastras-Martinez A AU - Hinger K AD - Univ Autonoma San Luis Potosi, Inst Invest & Comun Opt, San Luis Potosi, MexicoUniv Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi, MexicoJohannes Kepler Univ, Inst Halbleiter & Festkorperphys, Christian Doppler Labor Oberflachenopt Methoden, A-4040 Linz, AustriaLastras-Martinez, LF, Univ Autonoma San Luis Potosi, Inst Invest & Comun Opt, Alvaro Obregon 64, San Luis Potosi, Mexico TI - Stress-induced optical anisotropies measured by modulated reflectance AB - In the last few years, the understanding of information delivered by reflectance difference/anisotropy spectroscopy (RAS) has grown considerably. However, a full understanding of this optical technique is not yet achieved because surface, interface and bulk effects are present particularly where heteroepitaxial systems are concerned. This is especially true for the case of resonances at the bulk critical points of the dielectric function, which either resemble the dielectric function or its derivative. Previous RAS experiments on zincblende and diamond structure semiconductors found optical anisotropies in the vicinity of the E-0, E-1 and E-1 + Delta(1) critical points. In this review, the origin of these structures is discussed and it is shown that anisotropic in-plane strain in the epilayer or bulk induces resonances at these critical points. This in-plane strain is either caused by the boundaries of the epilayer system (i.e. the surface or the interface) or by symmetry breaking via a surface electric field or a preferred orientation of dislocations. These findings are best supported by applying additionally photoreflectance difference spectroscopy (PRD), where the difference between a spectrum taken with linearly polarized light and with unpolarized light is measured. In contrast to RAS, PRD spectroscopy is specific to the symmetry breakdown occurring due to band bending via the surface or interface electric field and stress MH - Austria MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Electrical & Electronic;Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Review AV - English IS - 0268-1242 UR - ISI:000223819400002 L2 - MOLECULAR-BEAM EPITAXY; IN-SITU OBSERVATION; PHOTON-INDUCED LOCALIZATION; DIFFERENCE SPECTROSCOPY; CUBIC SEMICONDUCTORS; ABSORBING MATERIALS; SURFACE-STRESS; GAAS; GROWTH; SPECTRA SO - Semiconductor Science and Technology 2004 ;19(9):R35-R46 11362 UI - 4271 AU - Laureano-Cruces AL AU - Teran-Gilmore A AU - De Arriaga F AD - Univ Autonoma Metropolitana Azcapotzalco, Dept Sistemas, Mexico City 13, DF, MexicoUniv Autonoma Metropolitana Azcapotzalco, Dept Mat, Mexico City 13, DF, MexicoUniv Politecn Madrid, Dept Matemat Aplicada, Madrid, SpainLaureano-Cruces, AL, Univ Autonoma Metropolitana Azcapotzalco, Dept Sistemas, Mexico City 13, DF, Mexico TI - A learning model based on a didactic cognitive approach: The case of single-degree-of-freedom sytems AB - Aiding the acquisition of cognitive abilities is an important issue within the teaching-learning process. The student should not only control his/her own learning process, but also the way he/she does it. One of the new developments in education, focused on achieving those goals, is the use of tools, models, and techniques derived from cognitive psychology to improve the design of course "curricula" within a specific knowledge domain. The paper presents a learning model that focuses on a specific topic, and uses a cognitive approach for building human expert mental models and schemes, partially based on the concepts of Forbus' qualitative theory. Regarding the didactic approach, the authors' experience is taken into account within a "student centered" learning approach, in which training or learning systems have a great significance. All these elements are integrated in the formulation of an intelligent learning prototype, now under construction, that fosters a qualitative understanding of the domain, before the quantitative part is dealt with. The selected domain is a specific topic of structural dynamics known as single-degree-of-freedom (SDOF) systems. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Spain PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Education, Scientific Disciplines;Engineering, Multidisciplinary U5 - J;Article AV - English IS - 1061-3773 UR - ISI:000224261900002 L2 - didactic cognitive model;artificial intelligence;teaching-learning process;qualitative reasoning;mental models;TASK-ANALYSIS SO - Computer Applications in Engineering Education 2004 ;12(3):152-164 11363 UI - 3845 AU - Lavalle-Gonzalez E AU - Storms E AU - Shutler S AU - Bianchi-Biscay M AU - Gomis R AU - Davies M AD - Univ Autonoma Nuevo Leon, Sch Med, Monterrey, NL, MexicoMesos Diabet Ctr, Bilthoven, NetherlandsAventis Pharma, W Malling, EnglandAventis Intercontinental, Med Affairs Dept, Paris, FranceHosp Clin Univ, Endocrinol & Diabet Unit, Barcelona, SpainLeicester Royal Infirm, Dept Diabet, Leicester, Leics, England TI - Initiation of basal insulin glargine therapy in Type 2 patients inadequately controlled on oral antidiabetic agents: results from the AT.LANTUS trial MH - United Kingdom MH - France MH - Mexico|Nuevo Leon MH - Netherlands MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000223951600751 SO - Diabetologia 2004 ;47():A272-A272 11364 UI - 3937 AU - Lavin M AU - Schrire BP AU - Lewis G AU - Pennington RT AU - gado-Salinas A AU - Thulin M AU - Hughes CE AU - Matos AB AU - Wojciechowski MF AD - Montana State Univ, Dept Plant Sci & Plant Pathol, Bozeman, MT 59717, USARoyal Bot Gardens, Richmond TW9 3AB, Surrey, EnglandRoyal Bot Gardens, Edinburgh EH3 5LR, Midlothian, ScotlandUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoUppsala Univ, Evolut Biol Ctr, Dept Systemat Bot, SE-75236 Uppsala, SwedenUniv Oxford, Dept Plant Sci, Oxford OX1 3RB, EnglandCIMAC, Minist Ciencias Tecnol & Medio Ambiente, Camaguey 70100, CubaArizona State Univ, Sch Life Sci, Tempe, AZ 85287, USALavin, M, Montana State Univ, Dept Plant Sci & Plant Pathol, Bozeman, MT 59717 USA TI - Metacommunity process rather than continental tectonic history better explains geographically structured phylogenies in legumes AB - Penalized likelihood estimated ages of both densely sampled intracontinental and sparsely sampled transcontinental crown clades in the legume family show a mostly Quaternary to Neogene age distribution. The mode ages of the intracontinental crown clades range from 4-6 Myr ago, whereas those of the transcontinental crown clades range from 8-16 Myr ago. Both of these young age estimates are detected despite methodological approaches that bias results toward older ages. Hypotheses that resort to vicariance or continental history to explain continental disjunct distributions are dismissed because they require mostly Palaeogene and older tectonic events. An alternative explanation centring on dispersal that may well explain the geographical as well as the ecological phylogenetic structure of legume phylogenies is Hubbell's unified neutral theory of biodiversity and biogeography. This is the only dispersalist theory that encompasses evolutionary time and makes predictions about phylogenetic structure MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal MH - USA MH - Sweden PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 20 U4 - Biology U5 - J;Article AV - English IS - 0962-8436 UR - ISI:000224918700006 L2 - Bayesian likelihood analysis;penalized likelihood rate smoothing;molecular age determination;intracontinental crown clades;transcontinental sister clades;unified neutral theory of biodiversity and biogeography;NORTHERN-HEMISPHERE; MOLECULAR EVOLUTION; BAYESIAN-INFERENCE; DIVERGENCE TIMES; DIVERSIFICATION; PATTERNS; FABACEAE; TERTIARY; ORIGIN; BIOGEOGRAPHY SO - Philosophical Transactions of the Royal Society of London Series B-Biological Sciences 2004 ;359(1450):1509-1522 11365 UI - 64 AU - Lavis JN AU - Posada FB AU - Haines A AU - Osei E AD - McMaster Univ, Hlth Sci Ctr, Ctr Hlth Econ & Policy Anal, Dept Clin Epidemiol & Biostat, Hamilton, ON L8N 3Z5, CanadaMcMaster Univ, Dept Polit Sci, Hamilton, ON L8N 3Z5, CanadaMinist Hlth, Gen Coordinat Natl Inst Hlth, Mexico City, DF, MexicoLondon Sch Hyg & Trop Med, London WC1, EnglandLavis, JN, McMaster Univ, Hlth Sci Ctr, Ctr Hlth Econ & Policy Anal, Dept Clin Epidemiol & Biostat, Room 2D3,1200 Main St W, Hamilton, ON L8N 3Z5, Canada TI - Use of research to inform public policymaking AB - To improve health and reduce health inequalities, public policymakers need to find the best solutions to the most burdensome health problems, the best ways to fit these solutions into complex and often overstretched and underresourced health systems, and the best ways to bring about the desired changes in health systems. Systematic reviews can inform public policymaking by providing research-based answers to these questions. Public policymakers can encourage more informed policymaking by asking to see systematic reviews on priority issues, commissioning reviews when none exists, and placing more value on such work in their deliberations and in their interactions with stakeholders. Donors and international agencies can encourage more informed public policymaking by supporting national and regional efforts to undertake reviews and assess their local applicability, and by supporting regional or worldwide efforts to coordinate review and assessment processes MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 27 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000224767600029 L2 - HEALTH-SYSTEMS; KNOWLEDGE; CARE; IMPLEMENTATION; INTERVENTIONS; GAP SO - Lancet 2004 ;364(9445):1615-1621 11366 UI - 5698 AU - Lawton TF AU - Gonzalez-Leon CM AU - Lucas SG AU - Scott RW AD - New Mexico State Univ, Dept Geol Sci, Las Cruces, NM 88003, USAUNAM, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoNew Mexico Museum Nat Hist & Sci, Albuquerque, NM 87104, USALawton, TF, New Mexico State Univ, Dept Geol Sci, Las Cruces, NM 88003 USA TI - Stratigraphy and sedimentology of the upper Aptian-upper Albian Mural Limestone (Bisbee Group) in northern Sonora, Mexico AB - The Cretaceous Mural Limestone in north-central Sonora, Mexico, is similar in stratigraphic succession and lithofacies to correlative strata of the Bisbee Group in the southwestern USA. It consists of 800-900 m of shallow-marine limestone and shale that range in age from late Aptian to mid-late Albian. Carbonate lithologies generally consist of oyster-bearing wackestone-packstone and rudistid boundstone, the latter forming discontinuous, mound-like bioherms. Siliciclastic intervals are dominated by dark gray to black shale with ammonoids and trigoniids. The Mural Limestone in north-central Sonora consists of six formal members, defined here. In ascending order, these are the Cerro La Ceja, Tuape Shale, Los Coyotes, Cerro La Puerta, Cerro La Espina and Mesa Quemada members. Based on ammonoids, trigoniids, and benthic foraminifers, the lower two members are late Aptian and the upper four members range from latest Aptian-mid-late Albian. The marine strata of the Mural Limestone separate two continental red bed successions that are difficult to differentiate on the basis of lithology and so provide an important marker in the Lower Cretaceous section of Sonora. Consistent stratigraphic successions throughout northern Sonora correlate with similar successions in the southwestern USA and northeastern Mexico, well beyond the limits of the Bisbee Basin, suggesting that global eustasy played an important role in deposition of these strata. Unusually thick Aptian shales of the Mural Limestone probably accumulated during post-rift tectonic subsidence, which enhanced the thickness of these marine-shelfal deposits. Consistent, predictable stratigraphy in the Mural Limestone across northern Sonora and the USA-Mexico border region likewise indicates that depositional models involving deep-marine gravitational emplacement of shallow-water facies proposed by some workers are untenable. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0195-6671 UR - ISI:000220990400004 L2 - mural limestone;Bisbee Group;Sonora;Mexico;Aptian-albian;ALGAL-RUDIST REEFS; SOUTHEASTERN ARIZONA; ROCKS SO - Cretaceous Research 2004 ;25(1):43-60 11367 UI - 3675 AU - Le Lagadec R AU - Rubio L AU - Alexandrova L AU - Toscano RA AU - Ivanova EV AU - Meskys R AU - Laurinavicius V AU - Pfeffer M AU - Ryabov AD AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04511, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04511, DF, MexicoMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, RussiaLithuania Acad Sci, Inst Biochem, Lab Bioanal, LT-2600 Vilnius, LithuaniaUniv Strasbourg 1, Lab Synth Metallo Ind, UMR 7513, F-67000 Strasbourg, FranceCarnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213, USALe Lagadec, R, Univ Nacl Autonoma Mexico, Inst Quim, Ciudad Univ, Mexico City 04511, DF, Mexico TI - Cyclometalated N,N-dimethylbenzylamine ruthenium(II) complexes [Ru((C6HRRR3)-R-1-R-2-o-CH2NMe2)(bpy)(RCN)(2)]PF6 for bioapplications: synthesis, characterization, crystal structures, redox properties, and reactivity toward PQQ-dependent glucose dehydrogenase AB - Cyclometalated derivatives of ring-substituted NN-dimethylbenzylamines with controlled redox potentials as potent mediators of bioelectrochemical electron transport are reported. The cycloruthenation of (RRRC6H2CH2NMe2)-R-1-R-2-C-3 (R-1, R-2, R-3 = H, Me, (BuO)-Bu-t, MeO, NMe2, F, CF3, CN, NO2) by [(eta(6)-C6H6)RuCl(mu-Cl)](2) in the presence of NaOH/KPF6 in acetonitrile or pivalonitrile affords cyclometalated complexes [(eta(6)-C6H6)RU((C6HRRR3)-R-1-R-2-omicron-(CHNMe2)-N-2)(RCN)]PF6 [R = Me (1) and R = CMe3 (2)] in good yields. Reactions of complexes 1 and 2 with 2,2'-bipyridine (bpy) in acetonitrile or pivalonitrile result in dissociation of eta(6)-bound benzene and the formation of [Ru((C6HRRR3)-R-1-R-2-omicron-CH2NMe2)(bpy)(RCN)(2)]PF6 [R = Me (3) and R = CMe3 (4)]. All new compounds have been fully characterized by mass spectrometry, H-1/C-13 NMR, and IR spectroscopy. An X-ray crystal structural investigation of complex 1 (R-1/R-2/R-3 = H/H/H) and two complexes of type 3 (R-1/R-2/R-3 = MeO/H/H, MeO/MeO/H) has been performed. Acetonitrile ligands of 3 are mutually cis and the a-bound carbon is trans to one of the bpy nitrogens. Measured by the cyclic voltammetry in MeOH as solvent, the redox potentials of complexes 3 for the Ru-II/III feature cover the range 320-720 mV (versus Ag/AgCl) and correlate linearly with the Hammett (sigma(p)(+) + sigma(m)) constants. Complexes 3 mediate efficiently the electron transport between the active site of PQQ-dependent glucose dehydrogenase (PQQ = pyrroloquinoline quinone) and a glassy carbon electrode. Determined by P cyclic voltammetry the second order rate constant for the oxidation of the reduced (by D-glucose) enzyme active site by Ru-III derivative of 3 (R-1/R-2/R-3 = H) (generated electrochemically) is as high as 4.8 x 10(7) M-1 s(-1) at 25 degreesC and pH 7. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Lithuania MH - Mexico|Distrito Federal MH - Russia MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000225669700021 L2 - cyclometalation;ruthenium complexes;electrochemistry;electron transfer;kinetics;PQQ-dependent glucose dehydrogenase;ORGANIC-SYNTHESIS; EFFICIENT; CATALYSIS; MEDIATORS; OXIDASE; PALLADACYCLES; PEROXIDASE; ACTIVATION; BIOSENSORS; PLATINUM SO - Journal of Organometallic Chemistry 2004 ;689(25):4820-4832 11368 UI - 5107 AU - Leanos-Castaneda A AU - Gold-Bouchot G AU - Van Der Kraak G AU - Lister A AU - Ceja-Moreno V AU - Sima-Alvarez R AD - CINVESTAV, Dept Recursos Mar, Unidad Merida, Yucatan 97310, MexicoUniv Guelph, Dept Zool, Guelph, ON N1G 2W1, CanadaUniv Autonoma Campeche, Ctr EPOMEX, Campeche, MexicoLeanos-Castaneda, A, CINVESTAV, Dept Recursos Mar, Unidad Merida, Carretera Antigua Progreso KM 6,Ap Postal 73, Yucatan 97310, Mexico TI - An aromatase inhibitor and tamoxifen decrease plasma levels of o,p '-DDT and its metabolites in Nile tilapia (Oreochromis niloticus) AB - The objective of this study was to determine if tamoxifen or an aromatase inhibitor (4-hydroxyandrostenedione; 4-OHA) affected plasma concentrations of o,p'-DDT and its metabolites, o,p'-DDD and o,p'-DDE, in mature tilapia. Male and female tilapia were injected 6 times intraperitoneally with o,p'-DDT (40 mg/kg) alone or in combination with 4-OHA (2 mg/kg) over a 12 day period. An additional group of male fish was injected with tamoxifen (5 mg/kg) plus o,p'-DDT. At the end of the treatment period, plasma samples were extracted and analyzed by GC/ECD. Females injected only with o,p'-DDT had significantly higher levels of o,p'-DDT compared with males. Interestingly, females and males treated concomitantly with o,p'-DDT and 4-OHA or tamoxifen had significantly lower concentrations of plasma o,p'-DDT (about 50%) compared with fish treated with only o,p'-DDT. These initial results suggest that an interaction between endocrine-active compounds occurs in vivo in tilapia and may involve alterations in metabolism of o,p'-DDT. (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|Campeche MH - Mexico|Yucatan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Marine & Freshwater Biology;Toxicology U5 - J;Article AV - English IS - 0141-1136 UR - ISI:000222199100035 L2 - DDT;tamoxifen;aromatase inhibitor;4-OHA;tilapia;fish;metabolism;RAT-LIVER; CYTOCHROME-P450; INDUCTION; DDT SO - Marine Environmental Research 2004 ;58(2-5):337-342 11369 UI - 6195 AU - Lechner D AU - Stavri M AU - Oluwatuyi M AU - Pereda-Miranda R AU - Gibbons S AD - Univ London, Sch Pharm, Ctr Pharmacognosy & Phytotherapy, London WC1N 1AX, EnglandUniv Nacl Autonoma Mexico, Fac Quim, Dept Farm, Mexico City 04510, DF, MexicoGibbons, S, Univ London, Sch Pharm, Ctr Pharmacognosy & Phytotherapy, 29-39 Brunswick Sq, London WC1N 1AX, England TI - The anti-staphylococcal activity of Angelica dahurica (Bai Zhi) AB - Bioassay-guided fractionation of a hexane extract prepared from the roots of the Chinese drug Angelica dahurica (Bai Zhi) led to the isolation of the polyacetylenic natural product falcarindiol (1). The absolute stereochemistry of this compound was confirmed by careful H-1 NMR analysis of its (R)- and (S)-Mosher ester derivatives as the 3(R), 8(S) isomer. Activity was tracked using a Mycobacterium fortuitum screening assay and the purified product was evaluated against multidrug-resistant and methicillin-resistant strains of Staphylococcus aureus (MRSA). The minimum inhibitory concentrations (MIC) of this metabolite ranged from 8 to 32 mug/ml highlighting the potential of the acetylene natural product class as antibiotic-lead compounds. These MIC values compare favourably with some of the newest agents in development for the treatment of MRSA infection and indicate that further evaluation of the antibiotic activity of acetylenes is warranted. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000188921600007 L2 - Bai Zhi;Angelica dahurica;Apiaceae;Mosher's esters;multidrug-resistance;Staphylococcus aureus;MDR;MRSA;polyacetylenes;STAPHYLOCOCCUS-AUREUS; ABSOLUTE-CONFIGURATION; RESISTANCE; DETERMINANT; PLANT SO - Phytochemistry 2004 ;65(3):331-335 11370 UI - 4976 AU - Lecomte F AU - Grant WS AU - Dodson JJ AU - Rodriguez-Sanchez R AU - Bowen BW AD - Univ Hawaii, Hawaii Inst Marine Biol, Kaneohe Bay, HI 96744, USAUniv Laval, Dept Biol, St Foy, PQ G1K 7P4, CanadaCICIMAR, La Paz, Baja California, MexicoBowen, BW, Univ Hawaii, Hawaii Inst Marine Biol, POB 1346, Kaneohe Bay, HI 96744 USA TI - Living with uncertainty: genetic imprints of climate shifts in East Pacific anchovy (Engraulis mordax) and sardine (Sardinops sagax) AB - In the upwelling zone of the northeastern Pacific, cold nutrient-rich conditions alternate with warm nutrient-poor intervals on timescales ranging from months to millennia. In this setting, the abundances of Pacific sardine (Sardinops sagax) and northern anchovy (Engraulis mordax) fluctuate by several orders of magnitude, with sardine dominating during warm conditions and anchovy dominating during cool conditions. Two population models can explain the response of these fishes to adverse conditions. Under the basin model, species distributions contract to a central (optimal) range during population crashes. Expectations of this model may include a single range-wide population with a decline in genetic diversity on both sides of a central refuge. In contrast, the self-recruitment model invokes a series of local oceanographic domains that maintain semi-isolated subpopulations. During adverse conditions, some subpopulations cannot complete the life cycle within the local environment and are extirpated. Expectations of this model include some degree of population genetic structure and no clear gradient in genetic diversity. We examined mitochondrial DNA cytochrome b sequences to assess these competing models for anchovy (N = 196; 539 bp) and sardine (N = 107; 425 bp). The mitochondrial DNA gene genealogies are shallow but diverse for both species. Haplotype frequencies are homogeneous among subpopulations, but genetic diversities peak for both species along Baja California and adjacent southern California. Mismatch distributions and Tajima's D-values reveal distinctive signatures of population bottlenecks and expansions. Sardine haplotypes coalesce at similar to241 000 years BP, with an initial female effective population size N-f0 = 0 followed by exponential growth to N-f1 = 115 million. Anchovy haplotypes coalesce at similar to282 000 years BP, with an initial population size of N-f0 = 14 000, followed by exponential growth to N-f1 = 2.3 million. These results indicate a founder event for sardine and a severe population decline for anchovy in the California Current during the late Pleistocene. Overall, these data support the basin model on decadal timescales, although local recruitment may dominate on shorter timescales MH - Canada MH - USA MH - Mexico|Baja California PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000222521300006 L2 - basin model;climate change;coalescence;fish;mtDNA;recruitment;GULF-OF-CALIFORNIA; GIRARD 1854 ENGRAULIDAE; SANTA-BARBARA BASIN; NORTHERN ANCHOVY; MARINE POPULATIONS; EQUATORIAL PACIFIC; OCEAN CIRCULATION; MITOCHONDRIAL-DNA; PELAGIC FISH; SOUTHERN-POPULATIONS SO - Molecular Ecology 2004 ;13(8):2169-2182 11371 UI - 5640 AU - Ledesma E AU - Martinez I AU - Cordova Y AU - Rodriguez-Sosa M AU - Monroy A AU - Mora L AU - Soto I AU - Ramos G AU - Weiss B AU - Osorio ES AD - UNAM, UIDCC, Lab Biol Celular & Mol Canc, Mexico City, DF, MexicoInst Nacl Cardiol Ignacin Chavez, Immunol Lab, Mexico City, DF, MexicoUNAM, FES Zaragoza, Immunobiol Lab, Zaragoza, SpainUIDCC, FES Zaragoza, Lab Oncol, Zaragoza, MexicoOsorio, ES, Fac Estudios Super Zaragoza, Lab L324, Campus 2,Batalla 5 Mayo S-N, Iztapalapa 09230, DF, Mexico TI - Interleukin-1 beta (IL-1 beta) induces tumor necrosis factor alpha (TNF-alpha) expression on mouse myeloid multipotent cell line 32D cl3 and inhibits their proliferation AB - Interleukin-1 alpha (IL-1alpha) and beta (IL-1beta) are well known factors that stimulate hematopoiesis, nevertheless there are reports that show that they can also inhibit this activity. While both IL-1alpha and IL-1beta induce the expression of hematopoietic cytokines, such as growth factors and their receptors on myeloid cells, helping thus to regulate hematopoiesis, it is not known if their inhibitory activity is also mediated through the induction of other specific cytokines. In this work we show that recombinant human IL-1beta (rhIL-1beta) inhibits the proliferation of a mouse IL-3-dependent myeloid multipotent cell line (32D cl3), without inducing its differentiation. We show that rhIL-1beta induces in 32D cl3 cells the expression of the tumor necrosis factor alpha (TNF-alpha) gene. a well known growth inhibitor. and that the rhIL-1beta growth inhibition property oil 32D cl3 cells is partially due to this secreted TNF-alpha, hinting thus that the inhibition of hematopoiesis by IL-1 is mediated through other induced cytokines. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Zaragoza MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Cell Biology;Immunology U5 - J;Article AV - English IS - 1043-4666 UR - ISI:000221031100003 L2 - interleukin-1;hematopoicsis inhibition;TNF-alpha;GROWTH-FACTOR-BETA; HEMATOPOIETIC PROGENITORS; NEGATIVE REGULATION; MACROPHAGES; LYMPHOPOIESIS; CYTOTOXICITY; CYTOKINES; LEUKEMIA; MEDIATOR; ABILITY SO - Cytokine 2004 ;26(2):66-72 11372 UI - 5359 AU - Ledig ET AU - Hodgskiss PD AU - Krutovskii KV AU - Neale DB AU - Eguiluz-Piedra T AD - Univ Calif Davis, Inst Forest Genet, Pacific SW Res Stn, USDA,Forest Serv, Davis, CA 95616, USAUniv Calif Davis, Dept Environm Hort, Davis, CA 95616, USAUniv Autonoma Chapingo, Ctr Genet Forestal, Mexico City 56230, DF, MexicoLedig, ET, Univ Calif Davis, Inst Forest Genet, Pacific SW Res Stn, USDA,Forest Serv, 1 Shields Ave, Davis, CA 95616 USA TI - Relationships among the spruces (Picea, pinaceae) of southwestern North America AB - Numerous populations from six spruce taxa, including four relict endemics, Picea chihuahuana (Chihuahua spruce), P. martinezii (Martinez spruce), P. mexicana (Mexican spruce), and P. breweriana (Brewer spruce), and two widespread species, P. engelmannii (Engelmann spruce) and P. pungens (blue spruce), were compared at homologous isozyme loci to test various hypotheses about their affinities and origins. Each of the species was clearly separated, and Neighbor-joining and Unweighted Pair Group analyses of Nei's genetic distance grouped all populations within a taxon into their own clusters. Spruces from Flys Peak, Chiricahua Mountains, Arizona, joined a P. engelmannii cluster and were not a bridge to P. mexicana as previously believed. Spruces from Cerro Mohinora, Chihuahua, were clearly P. mexicana, not phantom hybrids of P. chihuahuana and R pungens. Nuclear random amplified polymorphic DNA and chloroplast simple sequence repeat and cleaved amplified polymorphic genetic markers were compared in a smaller sample of populations, using distance and parsimony approaches. DNA markers, like isozymes, clearly identified spruces from Cerro Mohinora as P. mexicana. In contradiction to the most recent taxonomic treatment, P. chihuahuana and P. martinezii were separated as distinct species by both isozyme and DNA markers, and formed a sister-species group. Picea engelmannii and P. mexicana formed a separate cluster, and the genetic distance between them was similar to values associated with closely related species but greater than distances typical of subspecies or varieties in conifers. Picea pungens, which is so similar to P. engelmannii that the two are frequently misidentified, was clearly distinguished from it, sometimes joining a P. chihuahuana-martinezii group and sometimes a P. engelmannii-mexicana group, depending on analysis. Picea breweriana was well isolated from all other taxa. Both DNA and isozyme phylogenies agreed with results from crossability studies and contradicted intrageneric relationships constructed largely on cone morphology MH - USA MH - Mexico|Distrito Federal PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000221661400005 L2 - MATING SYSTEM; GENUS PICEA; GENETIC DIVERSITY; MEXICAN SPRUCE; POPULATIONS; ENGELMANNII; PUNGENS; DNA; DIFFERENTIATION; HYBRIDIZATION SO - Systematic Botany 2004 ;29(2):275-295 11373 UI - 4693 AU - Lee S AU - Flores-Encarnacion M AU - Contreras-Zentella M AU - Garcia-Flores L AU - Escamilla JE AU - Kennedy C AD - Univ Arizona, Dept Plant Sci, Div Plant Pathol & Microbiol, Tucson, AZ 85721, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoKennedy, C, Univ Arizona, Dept Plant Sci, Div Plant Pathol & Microbiol, POB 210036,Forbes 204, Tucson, AZ 85721 USA TI - Indole-3-acetic acid biosynthesis is deficient in Gluconacetobacter diazotrophicus strains with mutations in cytochrome c biogenesis genes AB - Gluconacetobacter diazotrophicus is an endophyte of sugarcane frequently found in plants grown in agricultural areas where nitrogen fertilizer input is low. Recent results from this laboratory, using mutant strains of G. diazotrophicus unable to fix nitrogen, suggested that there are two beneficial effects of G. diazotrophicus on sugarcane growth: one dependent and one not dependent on nitrogen fixation. A plant growth-promoting substance, such as indole-3-acetic acid (IAA), known to be produced by G. diazotrophicus, could be a nitrogen fixation-independent factor. One strain, Mad10, isolated by screening a library of Tn5 mutants, released only similar to6% of the amount of IAA excreted by the parent strain in liquid culture. The mutation causing the IAA(-) phenotype was not linked to Tn5. A pLAFR3 cosmid clone that complemented the IAA deficiency was isolated. Sequence analysis of a complementing subclone indicated the presence of genes involved in cytochrome c biogenesis (ccm, for cytochrome c maturation). The G. diazotrophicus ccm operon was sequenced; the individual ccm gene products were 37 to 52% identical to ccm gene products of Escherichia coli and equivalent cyc genes of Bradyrhizobium japonicum. Although several ccm mutant phenotypes have been described in the literature, there are no reports of ccm gene products being involved in IAA production. Spectral analysis, heme-associated peroxidase activities, and respiratory activities of the cell membranes revealed that the ccm genes of G. diazotrophicus are involved in cytochrome c biogenesis MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000223179000022 L2 - ACETOBACTER-DIAZOTROPHICUS; PSEUDOMONAS-FLUORESCENS; PLANT-GROWTH; ACETIC-ACID; RHIZOBIUM-PHASEOLI; MOLECULAR-CLONING; INDOLEACETIC-ACID; SEQUENCE-ANALYSIS; IRON ACQUISITION; ESCHERICHIA-COLI SO - Journal of Bacteriology 2004 ;186(16):5384-5391 11374 UI - 4006 AU - Lee SH AU - Wilson JC AU - Baumgardner D AU - Herman RL AU - Weinstock EM AU - LaFleur BG AU - Kok G AU - Anderson B AU - Lawson P AU - Baker B AU - Strawa A AU - Pittman JV AU - Reeves JM AU - Bui TP AD - Univ Denver, Dept Engn, Denver, CO 80208, USADroplet Measurement Technol, Boulder, CO 80301, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoCALTECH, Jet Prop Lab, Pasadena, CA 91109, USAHarvard Univ, Cambridge, MA 02138, USANASA, Langley Res Ctr, Chem & Dynam Branch, Hampton, VA 23681, USASPEC Inc, Boulder, CO 80301, USANASA, Ames Res Ctr, Moffett Field, CA 94305, USALee, SH, Univ Denver, Dept Engn, 2390 S York St, Denver, CO 80208, USA TI - New particle formation observed in the tropical/subtropical cirrus clouds AB - Previous studies show that new particle formation takes place in the outflows of marine stratus and cumulus clouds. Here we show measurements of high concentrations of ultrafine particles, diameters (D-p) from 4 to 9 nm (N4-9), in interstitial cloud aerosol. These ultrafine particles indicate that in situ new particle formation occurs interstitially in cirrus clouds. Measurements were made at altitudes from 7 to 16 km over Florida with instruments on the WB-57F aircraft during Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiments (CRYSTAL-FACE) in July 2002. Size-resolved ice crystal particle concentrations and water vapor concentrations were measured to help identify the presence of cirrus clouds. About 72% of the in-cloud samples showed new particle formation events with the average N4-9 of 3.0 x 10(3) cm(-3), whereas about 56% of the out-of-cloud samples had events with the lower N4-9 of 1.3 x 10(3) cm(-3). The periods during which high N4-9 appeared were often associated with times of increasing ice water content (IWC) and high relative humidity with respect to ice (RHI); however, the measured N4-9 was not quantitatively correlated to IWC. The magnitude and frequency of new particle formation events seen in cirrus clouds were also higher than those previously observed in the tropical/subtropical upper troposphere in the absence of clouds. These results suggest that cirrus clouds may provide favorable conditions for particle formation, such as low temperatures, high RHI, high OH production ( due to high water vapor), cloud electricity, and atmospheric convection. At present, however, particle formation mechanisms in clouds are unidentified MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 7 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000224877000007 L2 - new particle formation;cirrus clouds;upper troposphere and lower stratosphere (UT-LS);CONDENSATION NUCLEI; UPPER TROPOSPHERE; LOWER STRATOSPHERE; BINARY NUCLEATION; MARINE ATMOSPHERE; RELATIVE-HUMIDITY; AEROSOL FORMATION; SULFURIC-ACID; NASA ER-2; AIRCRAFT SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D20): 11375 UI - 5298 AU - Lee WH AU - Ramirez-Ruiz E AU - Page D AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Adv Study, Sch Nat Sci, Princeton, NJ 08540, USALee, WH, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264,Cd Univ, Mexico City 04510, DF, Mexico TI - Opaque or transparent? A link between neutrino optical depths and the characteristic duration of short gamma-ray bursts AB - Cosmological gamma-ray bursts (GRBs) are thought to occur as a result of violent hypercritical accretion onto stellar mass black holes, following either core collapse in massive stars or compact binary mergers. This dichotomy may be reflected in the two classes of bursts having different durations. Dynamical calculations of the evolution of these systems are essential if one is to establish characteristic relevant timescales. We show here for the first time the result of dynamical simulations, lasting approximately 1 s, of postmerger accretion disks around black holes, using a realistic equation of state and considering neutrino emission processes. We find that the inclusion of neutrino optical depth effects produces important qualitative temporal and spatial transitions in the evolution and structure of the disk, which may directly reflect on the duration and variability of short GRBs MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 26 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000221881600002 L2 - accretion, accretion disks;dense matter;gamma rays : bursts;hydrodynamics neutrinos;SMOOTHED PARTICLE HYDRODYNAMICS; BLACK-HOLES; ACCRETION DISKS; BINARY COALESCENCE; STARS; NUCLEOSYNTHESIS; EVOLUTION; SYSTEM; NUCLEI; ENERGY SO - Astrophysical Journal 2004 ;608(1):L5-L8 11376 UI - 5953 AU - Lee WH AU - Abramowicz MA AU - Kluzniak W AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoChalmers Univ, Dept Astrophys, S-41296 Gothenburg, SwedenZielona Gora Univ, Inst Astron, PL-65265 Zielona Gora, PolandCopernicus Astron Ctr, PL-00716 Warsaw, PolandLee, WH, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Resonance in forced oscillations of an accretion disk and kilohertz quasi-periodic oscillations AB - We have performed numerical simulations of a radially perturbed "accretion" torus around a black hole or neutron star and find that the torus performs radial and vertical motions at the appropriate epicyclic frequencies. We find clear evidence that vertical motions are excited in a nonlinear resonance when the applied perturbation is periodic in time. The strongest resonant response occurs when the frequency difference of the two oscillations is equal to one-half the forcing frequency, precisely as recently observed in the accreting pulsar SAX J1808.4 - 3658, where the observed kilohertz quasi-periodic oscillation peak separation is half the spin frequency of 401 Hz MH - Mexico|Distrito Federal MH - Poland MH - Sweden PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 36 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000220300800008 L2 - accretion, accretion disks;hydrodynamics;stars : neutron;X-rays : binaries;X-RAY BINARIES; BLACK-HOLE; NEUTRON-STARS; GRO J1655-40 SO - Astrophysical Journal 2004 ;603(2):L93-L96 11377 UI - 3642 AU - Lekht EE AU - Hernandez OR AU - Tolmachev AM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119992, RussiaRussian Acad Sci, PN Lebedev Phys Inst, Ctr Astro Space, Pushchino Radio Astron Observ, Pushchino 142290, Moscow Oblast, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51&216, Puebla 72840, Mexico TI - Some results of 22-year monitoring (1982-2003) of Sagittarius b2 in the 1.35-cm line AB - A catalog of lambda = 1.35 cm water-vapor maser spectra in Sgr B2 obtained in 1992-2003 is presented; this supplements our results for earlier observations in 1982-1992. Sgr B2 was monitored using the 22 m radio telescope of the Pushchino Radio Astronomy Observatory. The whole monitoring dataset for 1982-2003 has been analyzed. The emission received is a superposition of radiation from various parts of the entire Sgr B2 region, but the main contribution is made by two sources: Sgr B2(M) and Sgr B2(N). The monitoring did not reveal any long-term component of the integrated maser flux variations with a period shorter than 20 years. The flare component of the flux variability and a short-period component with a mean period of two years have been found. The latter are correlated with variations of the velocity centroid, supporting the reality of the short-period variations. It is likely that all the various types of variations are inherent to both Sgr B2(M) and Sgr B2(N), and represent a superposition of the variations occurring in each of these sources. There is an alternation of maxima of the emission from Sgr B2(M) and Sgr B2(N). (C) 2004 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000225922900001 L2 - STAR-FORMING REGION; CONTINUUM OBSERVATIONS; MOLECULAR CLOUD; HIGH-RESOLUTION; EMISSION SO - Astronomy Reports 2004 ;48(12):965-978 11378 UI - 5794 AU - Lekht EE AU - Hernandes OR AU - Tolmachev AM AU - Berulis II AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119992, RussiaRussian Acad Sci, Pushchino Radio Astron Observ, Ctr Astro Space, Lebedev Phys Inst, Pushchino 142290, Moscow Oblast, RussiaTechnol Univ, Kaunas, LithuaniaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - H2O maser emission in the direction of sagittarius B2: Results of monitoring for 1982-1992 AB - The results of monitoring the water-vapor maser at lambda = 1.35 cm in Sgr 132 are presented. The observations were carried out on the 22-m radio telescope of the Pushchino Radio Astronomy Observatory (Russia) in 1982-1992. A strong flare of the maser radiation associated with Sgr 132(N) was detected in this period. The absolute strength of this flare is comparable to the megamaser emission observed in Orion in 1979-1987. The flare is probably due to a strengthening of the flow of material from the rotating accretion disk, in which are embedded the three ultracompact HII regions K1, K2, and K3. A subsequent excitation of emission features at increasingly higher radial velocities was observed, associated with a gradient of V-LSR along the direction of the outflow. The large width of the lines (> 0.86 km/s) could reflect a complex structure for the maser spots, such as a chain or filamentary structure, as has been observed in Orion and S140. (C) 2004 MAIK "Nauka/Interperiodica" MH - Lithuania MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000220707700001 L2 - STAR-FORMING REGION; MOLECULAR CLOUD; CONTINUUM OBSERVATIONS; CORE; RING SO - Astronomy Reports 2004 ;48(3):171-184 11379 UI - 5795 AU - Lekht EE AU - Munitsyn VA AU - Tolmachev AM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoSternberg Astron Inst, Moscow 119992, RussiaCtr Space Res, Moscow, RussiaRussian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, Pushchino Radio Astron Observ, Pushchino 142290, Moscow Oblast, RussiaLekht, EE, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Apdo Postal 51 & 216, Puebla 72840, Mexico TI - Long-term monitoring of the water-vapor maser in NGC 7538: 1993-2003 AB - The paper presents the results of monitoring the H2O maser in NGC 7538, which is associated with a star-formation region, in 1993-2003. The observations were carried out on the 22-m radio telescope of the Pushchino Radio Astronomy Observatory (Russia). The variability of the maser emission displays a cyclic character. Two cycles of the long-term variability of the total flux were detected over the entire monitoring period (1981-2003): 1981-1993 and 1994-2003. The period of the variability is about 13 years. An anticorrelation of the emission in lateral sections of the spectra is observed, as is characteristic of protoplanetary disks. A drift in the radial velocity of the central component is observed (V-LSR = -60 km/s) with a drift rate of about 0.09 km/s per year. The water-vapor maser is most likely associated with a protoplanetary disk. (C) 2004 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1063-7729 UR - ISI:000220707700003 L2 - H-II REGIONS; MOLECULAR CLOUD; STAR-FORMATION; RESOLUTION SO - Astronomy Reports 2004 ;48(3):200-209 11380 UI - 4732 AU - Lemos-Espinal JA AU - Smith GR AU - Ballinger RE AD - Univ Nacl Autonoma Mexico, Fac Estudios Superiores Iztacala, Unidad Biol Tecnol & Prototipos, Ecol Lab, Tlalnepantla, Estado Mexico, MexicoDenison Univ, Dept Biol, Granville, OH 43023, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USALemos-Espinal, JA, Univ Nacl Autonoma Mexico, Fac Estudios Superiores Iztacala, Unidad Biol Tecnol & Prototipos, Ecol Lab, Av De Los Barrios 1,CP 54090, Tlalnepantla, Estado Mexico, Mexico TI - Aspects of the ecology of a distinct population of Xenosaurus platyceps from Queretaro, Mexico MH - Mexico|Estado De Mexico MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0173-5373 UR - ISI:000223171200009 L2 - LIZARDS GENUS XENOSAURUS; RETREAT-SITE SELECTION; THERMAL ECOLOGY; SQUAMATA; GRANDIS; OAXACA SO - Amphibia-Reptilia 2004 ;25(2):204-210 11381 UI - 4354 AU - Lemos D AU - del Toro AN AU - Cordova-Murueta JH AU - Garcia-Carreno F AD - Univ Sao Paulo, Inst Oceanog, BR-5315937 Sao Paulo, BrazilCIBNOR, La Paz 23000, BCS, MexicoLemos, D, Univ Sao Paulo, Inst Oceanog, CP 66149, BR-5315937 Sao Paulo, Brazil TI - Testing feeds and feed ingredients for juvenile pink shrimp Farfantepenaeus paulensis: in vitro determination of protein digestibility and proteinase inhibition AB - Protein is the major component for shrimp feeds and must be nutritionally appropriate and readily digestible. In vitro protein digestibility of feeds and feed ingredients, and their inhibitory effect on the digestive proteases of juvenile Farfantepenaeus paulensis were examined. The analysis included animal (four types of fish meal, meat meal and blood meal) and plant (soybean meal and wheat flour) ingredients. Commercial shrimp feed from different sources were also assessed. The degree of hydrolysis of feedstuff with shrimp enzymes was determined through the pH-stat routine as well as monitored in SDS-PAGE over time. Enzyme inhibition of shrimp enzymes was verified by spectrophotometric and substrate-SDS-PAGE assays. Brazilian fish meal, meat meal and wheat flour presented higher digestibility either by in vitro degree of hydrolysis as in SDS-PAGE. Intermediate digestibility was found for Super Prime Chilean and Argentinean fish meals. Least digestible ingredients were soybean meal and blood meal that exhibited high inhibitory effects on shrimp proteinases. Commercial shrimp feeds also differed in terms of digestibility and inhibitory effects. The routine may be employed for quality control of feedstuffs for shrimp culture, being potentially applicable to different segments of the shrimp culture industry such as feed suppliers, feed manufacturers and farmers. (C) 2004 Elsevier B.V. All fights reserved MH - Brazil MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000224004700021 L2 - shrimp;digestibility;protease;feed;ingredient;LANGOSTILLA PLEURONCODES-PLANIPES; TROUT SALMO-GAIRDNERI; PENAEUS-MONODON; LITOPENAEUS-VANNAMEI; PROTEASES; DIETS; PURIFICATION; CRUSTACEA; JAPONICUS; DECAPODA SO - Aquaculture 2004 ;239(1-4):307-321 11382 UI - 6208 AU - Lemus R AU - Arias JM AU - Gomez-Camacho J AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Seville, Fac Fis, Dept Fis Atom Mol & Nucl, Seville 41080, SpainLemus, R, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apto Postal 70-543, Mexico City 04510, DF, Mexico TI - An su(1,1) dynamical algebra for the Morse potential AB - An su (1, 1) dynamical algebra to describe both the discrete and the continuum parts of the spectrum for the Morse potential is proposed. The space associated with this algebra is given in terms of a family of orthonormal functions {Phi(n)(sigma)} characterized by the parameter sigma. This set is constructed from polynomials which are orthogonal with respect to a weighting function related to a Morse ground state. An analysis of the associated algebra is investigated in detail. The functions are identified with Morse-like functions associated with different potential depths. We prove that for a particular choice of or the discrete and the continuum parts of the spectrum decouple. The connection of this treatment with the supersymmetric quantum mechanics approach is established. A closed expression for the Mecke dipole moment function is obtained MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000188952400026 L2 - LOCAL MODE VIBRATIONS; QUANTUM-MECHANICS; LADDER OPERATORS; OSCILLATOR; MOLECULES; SUPERSYMMETRY; APPROXIMATION; EQUATIONS; STATES SO - Journal of Physics A-Mathematical and General 2004 ;37(5):1805-1820 11383 UI - 6298 AU - Lennon JJ AU - Koleff P AU - Greenwood JJD AU - Gaston KJ AD - Macaulay Inst, Aberdeen AB15 8QH, ScotlandComis Nacl Conocimiento & Uso Biodiversidad, Liga Perifer, Mexico City 14010, DF, MexicoThe Nunnery, British Trust Ornithol, Norfolk, EnglandUniv Sheffield, Dept Anim & Plant Sci, Biodivers & Macroecol Grp, Sheffield S10 2TN, S Yorkshire, EnglandLennon, JJ, Macaulay Inst, Aberdeen AB15 8QH, Scotland TI - Contribution of rarity and commonness to patterns of species richness AB - There is little understanding in ecology as to how biodiversity patterns emerge from the distribution patterns of individual species. Here we consider the question of the contributions of rare (restricted range) and common (widespread) species to richness patterns. Considering a species richness pattern, is most of the spatial structure, in terms of where the peaks and troughs of diversity lie, caused by the common species or the rare species (or neither)? Using southern African and British bird richness patterns, we show here that commoner species are most responsible for richness patterns. While rare and common species show markedly different species richness patterns, most spatial patterning in richness is caused by relatively few, more common, species. The level of redundancy we found suggests that a broad understanding of what determines the majority of spatial variation in biodiversity may be had by considering only a minority of species MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 39 U4 - Ecology U5 - J;Article AV - English IS - 1461-023X UR - ISI:000188820400001 L2 - distribution;diversity;rarity;DIVERSITY; DISTRIBUTIONS; CONSERVATION; BIODIVERSITY; HOTSPOTS; BIRDS SO - Ecology Letters 2004 ;7(2):81-87 11384 UI - 6527 AU - Lenorzer A AU - Bik A AU - de Koter A AU - Kurtz SE AU - Waters LBFM AU - Kaper L AU - Jones CE AU - Geballe TR AD - Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, NetherlandsUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, MexicoKatholieke Univ Leuven, Inst Sterrenkunde, B-3001 Heverlee, BelgiumUniv Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, CanadaGemini Observ, Hilo, HI 96720, USALenorzer, A, Univ Amsterdam, Astron Inst Anton Pannekoek, Kruislaan 403, NL-1098 SJ Amsterdam, Netherlands TI - The peculiar circumstellar environment of NGC 2024 IRS2 AB - We re-examine the nature of NGC 2024 IRS2 in light of the recent discovery of the late O-type star, IRS2b, located 5" from IRS2. Using L-band spectroscopy, we set a lower limit of A(V)=27.0 mag on the visual extinction towards IRS2. Arguments based on the nature of the circumstellar material, favor an A(V) of 31.5 mag. IRS2 is associated with the UCHII region G206.543-16.347 and the infrared source IRAS05393-0156. We show that much of the mid-infrared emission towards IRS2, as well as the far infrared emission peaking at similar to100 mum, do not originate in the direct surroundings of IRS2, but instead from an extended molecular cloud. Using new K-, L- and L'-band spectroscopy and a comprehensive set of infrared and radio continuum measurements from the literature, we apply diagnostics based on the radio slope, the strength of the infrared hydrogen recombination lines, and the presence of CO band-heads to constrain the nature and spatial distribution of the circumstellar material of IRS2. Using simple gaseous and/or dust models of prescribed geometry, we find strong indications that the infrared flux originating in the circumstellar material of IRS2 is dominated by emission from a dense gaseous disk with a radius of about 0.6 AU. At radio wavelengths the flux density distribution is best described by a stellar wind recombining at a radius of about 100 AU. Although NGC 2024 IRS2 shares many similarities with BN-like objects, we do not find evidence for the presence of a dust shell surrounding this object. Therefore, IRS2 is likely more evolved MH - Belgium MH - Canada MH - Mexico|Michoacan MH - Netherlands MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000188009900025 L2 - stars : circumstellar matter;early-type;individual : NGC 2024 IRS2;infrared : stars;H-II REGIONS; EARLY-TYPE STARS; ENERGY GAIN; NGC 2024; INFRARED-SPECTROSCOPY; CONTINUUM EMISSION; GAMMA-CASSIOPEIAE; RADIO-CONTINUUM; MASSIVE STARS; ENVELOPES SO - Astronomy & Astrophysics 2004 ;414(1):245-259 11385 UI - 3953 AU - Lenzing H AU - de la Pena JA AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Gesamthsch Paderborn, Fak Math, D-33095 Paderborn, Germanyde la Pena, JA, Univ Nacl Autonoma Mexico, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Supercanonical algebras MH - Germany MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000224930500016 L2 - FINITE-DIMENSIONAL ALGEBRAS; CANONICAL ALGEBRAS; EQUIVALENCE; FORMS SO - Journal of Algebra 2004 ;282(1):298-348 11386 UI - 6052 AU - Leon HV AU - Hernandez-Ceron J AU - Keisler DH AU - Gutierrez CG AD - Univ Nacl Autonoma Mexico, Fac Med Vet, Dept Reprod, Mexico City 04510, DF, MexicoUniv Missouri, Dept Anim Sci, Columbia, MO 65211, USAGutierrez, CG, Univ Nacl Autonoma Mexico, Fac Med Vet, Dept Reprod, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Plasma concentrations of leptin, insulin-like growth factor-I, and insulin in relation to changes in body condition score in heifers AB - The objective of this study was to determine the relationships among plasma concentrations of leptin, insulin, and IGF-I with dynamic changes in body condition scores (BCS) in heifers. Nineteen Zebu-Brown Swiss crossbred heifers, 24 to 30 mo old, weighing 322 9 kg, and with an initial BCS of 2.6 +/- 0.11 (range = 1 to 9) were used. Heifers were fed 60% of their maintenance requirements until they reached a BCS of less than or equal to2. Heifers were then maintained at that level for 25 d, after which they were fed to gain 1 kg of body weight daily until a BCS of 6 was reached. Heifers were weighed weekly and BCS was measured every 2 wk. Plasma samples were collected twice weekly, and leptin and insulin were determined by RIA. An immunoradiometric assay was used to measure IGF-I from one sample every 2 wk. Plasma concentrations of leptin were positively correlated during nutritional restriction (NR) and weight gain (WG) periods with BCS (r = 0.47 for NR, and r = 0.83 for WG; P < 0.01) and body weight (r = 0.40 for NR, and r = 0.78 for WG; P < 0.01). Plasma concentrations of leptin decreased during nutritional restriction (P < 0.01) as BCS decreased. During weight gain, leptin concentration increased at BCS 3 and there- after for each integer change in the BCS. Regression analysis showed that changes in body weight affect leptin concentrations within a given BCS. There was a decrease in IGF-I as BCS declined (P < 0.01). During weight gain, by contrast, IGF-I increased significantly (P < 0.01) with every unit change in body condition up to BCS of 4 and plateaued thereafter. Insulin concentrations did not change during nutritional restriction when BCS decreased from 3 to 1. However, once the diet was improved, there was a large increase in insulin concentrations in heifers with BCS 1 (P < 0.01). Among heifers of BCS 2 and 3, insulin did not differ and was lower than in heifers of BCS 1 (P < 0.01). Insulin increased (P < 0.01) among heifers at BCS 4 to 6. Leptin was positively correlated (P < 0.01) with both IGF-I (r = 0.34 for NR, and r = 0.36 for WG) and insulin (r = 0.18 for WG). Insulin was correlated with IGF-I (r = 0.60; P < 0.01). During nutritional restriction, insulin did not correlate with leptin (r = -0.05), BCS (r = -0.03), or IGF-I (r = 0.07). It was concluded that leptin serves as a dynamic indicator of body condition in heifers, as well as an indicator of nutritional status MH - Mexico|Distrito Federal MH - USA PB - SAVOY: AMER SOC ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0021-8812 UR - ISI:000220097800013 L2 - beef heifers;insulin;insulin-like growth factor-I;leptin;nutrition;NEGATIVE-ENERGY BALANCE; HOLSTEIN DAIRY-COWS; LUTEINIZING-HORMONE; GENE-EXPRESSION; ADIPOSE-TISSUE; BEEF HEIFERS; NUTRITIONAL REGULATION; COMPENSATORY GROWTH; METABOLIC HORMONES; CENTRAL INFUSION SO - Journal of Animal Science 2004 ;82(2):445-451 11387 UI - 4235 AU - Leon I AU - Enriquez RDG AU - Gnecco D AU - Villarreal ML AU - Cortes DA AU - Reynolds WF AU - Yu M AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBenemerita Univ Autonoma Puebla, Ctr Quim, Inst Ciencias, Puebla, MexicoIMSS, Ctr Invest Biomed Sur, Xochitepec, Morelos, MexicoUniv Toronto, Dept Chem, Toronto, ON M5S 3H6, CanadaLeon, I, Univ Autonoma Estado Morelos, Ctr Invest Quim, Ave Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Isolation and characterization of five new tetrasaccharide glycosides from the roots of Ipomoea stans and their cytotoxic activity AB - Five new tetrasaccharide glycosides, stansins 1-5 (1-5), were isolated from the roots of Ipomoea stans, and their structures were elucidated using spectroscopic and chemical methods. Preliminary testing showed the cytotoxicity of 5 toward the OVCAR and UISO-SQC-1 cancer cell lines MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Puebla PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000224187700022 SO - Journal of Natural Products 2004 ;67(9):1552-1556 11388 UI - 5990 AU - Lepetit J AU - Favier R AU - Grajales A AU - Skjervold PO AD - INRA, Biophys Res Lab, F-63122 St Genes Champanelle, FranceUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, SLP, MexicoAgr Univ Norway, Dept Agr Engn, N-1432 As, NorwayLepetit, J, INRA, Biophys Res Lab, F-63122 St Genes Champanelle, France TI - A simple cryogenic holder for tensile testing of soft biological tissues AB - To overcome the difficulty of gripping soft biological materials for tensile test, a simple inexpensive cryogenic holder was developed which allows rapid (3 min) preparation of samples. It is made of 6 parts, built in a bakelite cloth, which is an excellent thermal isolant, and is used with rectangular (8 x 10(-2) x 10(-2) x 10-2 m) samples. The holder with the sample inside is completely immersed in liquid nitrogen for 50 s. This duration allows the freezing of the sample ends on a 10(-2) M length and gives a very flat freezing surface throughout the sample cross section. The 6 x 10(-2) M central part of the sample remained at ambient temperature. Two parts of the holder help maintain the sample until its ends are vertically gripped in the tensile machine thus avoiding any sample deformation during this step. No pressure was applied on the frozen part of the sample by grips of the tensile machine and this avoids breaks in this region. The sample is fixed by adhesion forces (> 1 kN) between its frozen parts and 2 pieces of the holder. The procedure has been successfully tested with bovine and salmon muscle sample s and results show tensile breaks randomly distributed in the unfrozen region of the samples. Particular attention has been paid to obtain a very flat freezing surface so that the axial strain is equal throughout the sample and therefore any strain-related mechanical parameters can be accurately determined. The dimensions of the holder can be easily modified to fit other sample geometries and can be used with other biological materials. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|San Luis Potosi MH - Norway PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Biophysics;Engineering, Biomedical U5 - J;Article AV - English IS - 0021-9290 UR - ISI:000220236600015 L2 - cryogenic grip;muscle;fish;tensile test;mechanical properties;INVITRO; TENDON; MUSCLE SO - Journal of Biomechanics 2004 ;37(4):557-562 11389 UI - 3423 AU - Leppanen T AU - Karttunen M AU - Barrio RA AU - Kaski K AD - Helsinki Univ Technol, Lab Computat Engn, FIN-02015 Espoo, FinlandUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoLeppanen, T, Helsinki Univ Technol, Lab Computat Engn, POB 9203, FIN-02015 Espoo, Finland TI - Morphological transitions and bistability in Turing systems AB - It is well known that in two dimensions Turing systems produce spots, stripes and labyrinthine patterns, and in three dimensions lamellar and spherical structures, or their combinations, are observed. In this paper we study transitions between these states in both two and three dimensions. First, we derive the regions of stability for different patterns using nonlinear bifurcation analysis. Then, we apply large scale computer simulations to analyze the pattern selection in a bistable system by studying the effect of parameter selection on morphological clustering and the appearance of topological defects. The method elaborated in this paper presents a probabilistic approach for studying pattern selection in a bistable reaction-diffusion system MH - Finland MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000226299200059 L2 - REACTION-DIFFUSION-SYSTEMS; SPATIAL-PATTERN-FORMATION; MALONIC-ACID REACTION; SYMMETRY-BREAKING; CHEMICAL-PATTERN; BIFURCATIONS; INSTABILITY; EQUATIONS; SELECTION; DYNAMICS SO - Physical Review e 2004 ;70(6): 11390 UI - 3481 AU - Lerman I AU - Lozano L AU - Villa AR AU - Hernandez-Jimenez S AU - Weinger K AU - Caballero AE AU - Salinas CA AU - Velasco ML AU - Gomez-Perez FJ AU - Rull JA AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Clin Epidemiol Unit, Mexico City 14000, DF, MexicoHarvard Univ, Sch Med, Joslin Diabet Ctr, Boston, MA 02115, USALerman, I, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Psychosocial factors associated with poor diabetes self-care management in a specialized Center in Mexico City AB - To examine the relationship between demographic, clinical and psychosocial variables and diabetes self-care management in Mexican type 2 diabetic patients. Cross-sectional study of 176 consecutive patients with type 2 diabetes aged 30-75 years, attending a tertiary health-care center in Mexico City. A brief medical history and previously validated questionnaires were completed. The study group consisted of 64 males/112 females, aged 55 +/- 11 years, mean diabetes duration of 12 +/- 8 years and HbA1c of 9.0 +/- 2.0%, 78.4% reported following the correct dose of diabetes pills or insulin, 58% ate the recommended food portions, and 44.3% did exercise three or more times per week. A good adherence to these three recommendations was observed in only 26.1% of the patients. These patients considered as a group were characterized by a greater knowledge about the disease (P < 0.00001), regular home blood glucose monitoring (P < 0.01), an inner perception of better diabetes control (P = 0.007), good health (P = 0.004) and better communication with their physician (P < 0.02). A poor adherence to two or the three main diabetes care recommendations was associated with a depressive state (OR 2.38, 95% Cl 1.1-4.9, P < 0.01) and a history of excessive alcohol intake (OR 4.03, 95% Cl 1.1-21.0, P = 0.03). Poor adherence to standard diabetes care recommendations is frequently observed in patients with type 2 diabetes attending a specialized health care center in Mexico City. Depression must be identified and treated effectively. (C) 2004 Elsevier SAS. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0753-3322 UR - ISI:000226250600005 L2 - adherence to treatment;Type 2 diabetes;depression;ADHERENCE; DEPRESSION; AMERICANS; BEHAVIORS; MELLITUS; BARRIERS; OUTCOMES; PATIENT; REGIMEN; ADULTS SO - Biomedicine & Pharmacotherapy 2004 ;58(10):566-570 11391 UI - 5086 AU - Leuraud P AU - Taillandier L AU - Medioni J AU - guirre-Cruz L AU - Criniere E AU - Marie Y AU - Kujas M AU - Golmard JL AU - Duprez A AU - Delattre JY AU - Sanson M AU - Poupon MF AD - Hop La Pitie Salpetriere, Fed Neurol Mazarina, F-75013 Paris, FranceGrp Hosp Pitie Salpetriere, Lab Biol Interact Neurones Glie, Inst Natl Sante & Rech Med, U 495, F-75634 Paris, FranceFac Med Vandoeuvre Nancy, Lab Anatomopathol & Microchirurgie Expt, F-54505 Vandoeuvre Les Nancy, FranceGrp Hosp Pitie Salpetriere, Unite Fonct Biostat, F-75634 Paris, FranceHop St Louis, Ctr Invest Clin, Paris, FranceInst Curie, Sect Rech, FRE 2584, Paris, FranceGrp Hosp Pitie Salpetriere, Lab Neuropathol R Escourolle, F-75634 Paris, FranceInst Nacl Neurol & Neurocirugia Mexico, Unidad Invest Sist Nervioso, Mexico City, DF, MexicoDelattre, JY, Hop La Pitie Salpetriere, Fed Neurol Mazarina, 47 Bd Hop, F-75013 Paris, France TI - Distinct responses of xenografted gliomas to different alkylating agents are related to histology and genetic alterations AB - A series of 12 human gliomas was established as xenografts in nude mice and used to evaluate the relationship between histology, genetic parameters, and response to alkylating agents. Eight were high-grade oligodendroglial tumors, and four were glioblastoma. They were characterized for their genetic alterations, including those considered as "early" alterations, namely loss of chromosome 1 +/- loss of chromosome 19q, TP53 mutation, and those considered as "late" alterations, namely loss of chromosome 10, loss of chromosome 9p, EGFR genomic amplification, PTEN mutation, CDKN2A homozygous deletion, and telomerase reactivation. Chemosensitivity of xenografts to four alkylating agents, temozolomide (42 mg/kg, days 1-5, p.o.), 1,3-bis(2-chloroethyl)-1-nitrosourea (5 mg/kg, day 1, i.p.), Ifosfamide (90 mg/kg, days 1-3, i.p.), and carboplatin (66 mg/kg, day 1, i.p.) was tested by administration of drugs to tumor-bearing mice. Although each tumor presented an individual response pattern, glioblastoma had a lower chemosensitivity than oligodendrogliomas, and temozolomide was the most effective drug. Deletion of 1p +/- 19q was associated with higher chemosensitivity, whereas late molecular alterations, particularly EGFR amplification, were associated with chemoresistance. These results suggest that the combined use of histology and molecular markers should eventually be helpful selecting the most appropriate agents for treatment of malignant oligodendrogliomas and astrocytomas MH - France MH - Mexico|Distrito Federal PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 9 U4 - Oncology U5 - J;Article AV - English IS - 0008-5472 UR - ISI:000222407300035 L2 - GROWTH-FACTOR RECEPTOR; HIGH-GRADE ASTROCYTOMAS; GLIOBLASTOMA-MULTIFORME; MALIGNANT GLIOMAS; ANAPLASTIC OLIGODENDROGLIOMAS; TELOMERASE ACTIVITY; PROGNOSTIC-FACTORS; P53 MUTATIONS; PATIENT AGE; SURVIVAL SO - Cancer Research 2004 ;64(13):4648-4653 11392 UI - 6332 AU - Leuraud P AU - Dezamis E AU - guirre-Cruz L AU - Taillibert S AU - Lejeune J AU - Robin E AU - Mokhtari K AU - Boch AL AU - Cornu P AU - Delattre JY AU - Sanson M AD - Univ Paris 06, Federat Neurol Mazarin,Serv Neurochirurg, Grp Hosp Pitie Salpetriere,Lab Neuropathol R Esco, Lab Biol Interact Neurones Glies,Inst Natl Sante, F-75013 Paris, FranceInst Nacl Neurol & Neurocirugia Mexico, Unidad Invest Sistema Nerviosa, Mexico City, DF, MexicoSanson, M, Univ Paris 06, Federat Neurol Mazarin,Serv Neurochirurg, Grp Hosp Pitie Salpetriere,Lab Neuropathol R Esco, Lab Biol Interact Neurones Glies,Inst Natl Sante, 47,Blvd Hop, F-75013 Paris, France TI - Prognostic value of allelic losses and telomerase activity in meningiomas AB - Object. The goal of this study was to examine allelic losses and telomerase activity in meningiomas to determine whether they could be used to predict disease recurrence. Methods. To identify predictive markers of recurrence, a cohort of high-grade (24 World Health Organization [WHO] Grade II and six WHO Grade III) and low-grade (21 WHO Grade 1) meningiomas was investigated for losses of heterozygosity (LOHs) on chromosomes 1p, 9p, 10q, 14q, and 22q, a deletion of CDKN2A, and telomerase activity. Results of molecular analyses were compared with radiological and histological findings and progression-free survival (PFS). Losses of heterozygosity on chromosomes 22q, 1p, and 10q, as well as telomerase activity were related to the WHO histological grades of the lesions (p < 0.01, p < 10(-5), p < 10(-4), and p = 0.002, respectively). In the absence of an LOH on 22q, the other alterations were found infrequently. Overall, the number of molecular alterations was closely related to the histological grades of the lesions (p < 10(-6)). An LOH on 22q occurred much more frequently in convexity or falx (33 [87%] of 38 lesions) than in skull base or spinal meningiomas (four [31%] of 13 lesions) (p < 0.001). The histological grade; Simpson grade; an LOH on chromosome 1p, 9p, or 10q; and telomerase activity were correlated with a shorter PFS time (p < 10(-4), p = 0.02, p = 0.000365, p = 0.022, p = 0.00027, and p = 0.000512, respectively). Conclusions. On the basis of these data the authors suggest that LOH analysis and a telomerase activity assay could be useful to determine molecular predictors of outcome in patients with meningiomas MH - France MH - Mexico|Distrito Federal PB - CHARLOTTESVILLE: AMER ASSOC NEUROLOGICAL SURGEONS RP - NOT IN FILE U3 - TC 10 U4 - Clinical Neurology;Surgery U5 - J;Article AV - English IS - 0022-3085 UR - ISI:000188551700018 L2 - meningioma;NF2 gene;chromosome;telomerase;prognostic marker;TUMOR-SUPPRESSOR GENE; NF2 GENE; ANAPLASTIC MENINGIOMAS; SPORADIC MENINGIOMAS; MALIGNANT PROGRESSION; CONSISTENT REGION; FREQUENT LOSS; DELETION; HETEROZYGOSITY; IDENTIFICATION SO - Journal of Neurosurgery 2004 ;100(2):303-309 11393 UI - 4532 AU - Levario-Carrillo M AU - Olave ME AU - Corral DC AU - Alderete JG AU - Gagioti SM AU - Bevilacqua E AD - Inst Mexicano Seguro Social, Unidad Invest Med & Epidemiol Clin, Chihuahua 31320, MexicoUniv Sao Paulo, Inst Ciencias Biomed, Dept Histol & Embriol, Sao Paulo, BrazilUniv Santo Amaro, Dept Morfol, Santo Amaro, BrazilLevario-Carrillo, M, Inst Mexicano Seguro Social, Unidad Invest Med & Epidemiol Clin, Av Div Norte 2300, Chihuahua 31320, Mexico TI - Placental morphology of rats prenatally exposed to methyl parathion AB - Although prenatal exposure to pesticides has been associated with numerous adverse reproductive effects, data on the effects of such toxics in the placenta is limited. Thus, the present study was carried out to determine the morphology of the rat placenta exposed to the organophosphate pesticide methyl parathion (MP) in ad libitum fed and restricted diet animals. The pregnant females were randomly divided into control groups and experimental groups. the latter of which received MP at the doses of 0.0, 1.0, 1.5 and 2.0 mg/kg. Most cells in the maternal-fetal interface showed significant alterations in the presence of MP. Trophoblast giant cells exhibited either prominent characteristics of degeneration or normal morphology with many phagosome vacuoles, apparently containing cell debris. Vascular congestion was also more frequent in the labyrinth of the treated animals. Areas of fibrosis and hemorrhage were found in the decidua, as well as decidual cells presenting pyknotic nuclei and acidophilic cytoplasm. In the placentas of females treated with both restricted diet and MP, such changes were much more severe. Together. these alterations suggest a direct, toxic effect of MP on the placental cells. The phagocytic activity exhibited by trophoblast cells, may be playing a role in the removal of death cells from the maternal-placental interface and/or in a compensatory mechanism to maintain the uptake of maternal nutrients, following decreased metabolic exchange functions of the labyrinth due to the toxic effect of the MP MH - Brazil MH - Mexico|Chihuahua PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Pathology;Toxicology U5 - J;Article AV - English IS - 0940-2993 UR - ISI:000223624200007 L2 - methyl parathion;placenta;morphology;pesticides;TOXICITY; EMBRYOTOXICITY; INSECTICIDES; CHLORPYRIFOS; PREGNANCY; EXPOSURES; PROTEIN; MICE SO - Experimental and Toxicologic Pathology 2004 ;55(6):489-496 11394 UI - 6076 AU - Levin RA AU - Wagner WL AU - Hoch PC AU - Hahn WJ AU - Rodriguez A AU - Baum DA AU - Katinas L AU - Zimmer EA AU - Sytsma KJ AD - Smithsonian Inst, Dept Systemat Biol, Washington, DC 20013, USAMissouri Bot Garden, St Louis, MO 63166, USAGeorgetown Univ, Washington, DC 20057, USADept Bot & Zool, Zapopan 45101, Jalisco, MexicoUniv Wisconsin, Dept Bot, Madison, WI 53706, USAMuseo Ciencias Nat, Dept Cient Plantas Vasc, RA-1900 La Plata, ArgentinaLevin, RA, Smithsonian Inst, Dept Systemat Biol, MRC 166,POB 37012, Washington, DC 20013 USA TI - Paraphyly in tribe onagreae: Insights into phylogenetic relationships of Onagraceae based on nuclear and chloroplast sequence data AB - Onagraceae are a family of 17 genera in seven tribes, with the majority of species in tribes Onagreae and Epilobieae. Despite the species-richness of these two tribes, to date no phylogenetic study has been done with sufficient taxon sampling to examine relationships between and within these tribes. In this study, we used DNA sequence data from one nuclear region (ITS) and two chloroplast regions (trnL-trnF and rps16) to infer phylogenetic relationships among 93 taxa across the family, with concentrated sampling in the large tribe Onagreae. Results strongly suggest that tribe Gongylocarpeae is sister to tribes Epilobieae + Onagreae, both of which are monophyletic. Within Onagreae, Camissonia seems to be broadly paraphyletic, and Oenothera is also paraphyletic. In Oenothera there appear to be two lineages, one of which has Gaura + Stenosiphon nested within it. At the base of the Onagraceae phylogeny, we have clarified previous confusion regarding conflicting placements of Hauya and Lopezia based on nuclear versus chloroplast data. Results of these analyses are supported by morphology and suggest the need for new taxonomic delimitations, which are forthcoming MH - Argentina MH - USA MH - Mexico|Jalisco PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000189310000014 L2 - PLANT FAMILY ONAGRACEAE; RIBOSOMAL DNA; TRNL-F; RBCL; INCONGRUENCE; EVOLUTION; CARYOPHYLLACEAE; CIRCUMSCRIPTION; EPILOBIEAE; MORPHOLOGY SO - Systematic Botany 2004 ;29(1):147-164 11395 UI - 4529 AU - Levresse G AU - Gonzalez-Partida E AU - Tritlla J AU - Pironon J AU - Camprubi A AU - Carrillo-Chavez A AU - Villareal J AD - Ctr Geosci, Programa Geofluidos, Juriquilla, Queretaro, MexicoCREGU UMR G2R, Nancy, France TI - Fluorite source of the El Pilote Deposit, Coahuila, Mexico MH - France MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Meeting Abstract AV - English IS - 0016-7037 UR - ISI:000221923400517 SO - Geochimica et Cosmochimica Acta 2004 ;68(11):A306-A306 11396 UI - 5292 AU - Levresse G AU - Cheilletz A AU - Gasquet D AU - Reisberg L AU - Deloule E AU - Marty B AU - Kyser K AD - Ctr Rech Petrog & Geochim, CNRS, UPR A2300, F-54501 Vandoeuvre Les Nancy, FranceENSG, INPL, F-54501 Vandoeuvre Les Nancy, FranceUNAM, Ctr Geociencias, Santiago de Queretaro 76230, MexicoQueens Univ, Dept Geol Sci & Geol Engn, Kingston, ON K7L 3N6, CanadaLevresse, G, Ctr Rech Petrog & Geochim, CNRS, UPR A2300, BP 20, F-54501 Vandoeuvre Les Nancy, France TI - Osmium, sulphur, and helium isotopic results from the giant Neoproterozoic epithermal Imiter silver deposit, Morocco: evidence for a mantle source AB - The giant epithermal Ag-Hg deposit of Imiter (Anti-Atlas, Morocco) was investigated to study the transfer of chalcophile elements from the mantle to superficial crustal levels. The origin of metals and ligands (sulphides) was deduced from S, fluid inclusions, He, and Re/Os data obtained on sulphide phases and gangue minerals. Sulphur isotope analyses show the existence of two distinct isotopic reservoirs, one found in pyrite from the surrounding black shale country rocks (delta(34)S(CDT) = -38parts per thousand and the other in pyrites associated with a synchronous rhyolitic dome (delta(34)S(CDT)) = -7 to -2%). The delta(34)S(CDT) values of the silver mineralization event range from - 28 to - 2parts per thousand and are interpreted as resulting from preferential degassing of SO2 in ascending fluids, as well as mixing between the magmatic isotopic reservoir and a country rock reservoir. Helium isotope analyses of sulphides and gangue minerals yield similar results, with He-3/He-4 ratios ranging from 0.76 to 2.64R(a). These data and the absence of Ne-20 in the analyzed fluid inclusions suggest a mantle origin for the fluids associated with the epithermal silver event. Os isotopic ratios have been measured for the first time in Agdegrees and Ag-sulphosalts. These data and those obtained on other sulphide phases directly associated with the Ag mineralization show measured Os-187/Os-188 ratios of 0.142-0.197 indicating a dominantly mantle source for the associated Os. Assuming that Os and Ag are derived from the same source, the black shale country rock provided less than 10% of the silver metal stock. This study highlights the conditions required to transfer 8000 metric tons of Ag (and other elements such as Hg, Co, Ni, Pb, Zn) from the mantle, i.e. (i) an efficient vector such as the sulphide ligand, (ii) a major and sudden break in the geodynamic environment similar to the one which occurred near the Precambrian-Cambrian transition to provide pathways from the mantle wedge and the lithospheric base to the surface and, (iii) a strongly extensional tectonic setting to provide traps for the concentration of metals in ore deposits. (C) 2004 Flsevier B.V. All rights reserved MH - Canada MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000222096900005 L2 - osmium;sulphur;helium;fluid inclusions;epithermal deposit;Imiter;Morocco;WEST-AFRICAN CRATON; ANTI-ATLAS; SUBDUCTION ZONES; ION MICROPROBE; BLACK SHALES; EVOLUTION; SYSTEM; SEAWATER; SULFIDE; SAGHRO SO - Chemical Geology 2004 ;207(1-2):59-79 11397 UI - 5548 AU - Levresse G AU - Gonzalez-Partida E AU - Carrillo-Chavez A AU - Tritlla J AU - Camprubi A AU - Cheilletz A AU - Gasquet D AU - Deloule E AD - UNAM, Programa Geofluidos, Ctr Geociencies, Queretaro 76230, MexicoCRPG CNRS, Ctr Rech Petrog & Geochim, F-54501 Vandoeuvre Les Nancy, FranceEcole Natl Super Geol, F-54501 Vandoeuvre Les Nancy, FranceLevresse, G, UNAM, Programa Geofluidos, Ctr Geociencies, Campus Juriquilla,AP 1-253, Queretaro 76230, Mexico TI - Petrology, U/Pb dating and (C-O) stable isotope constraints on the source and evolution of the adakite-related Mezcala Fe-Au skarn district, Guerrero, Mexico AB - The Mezcala gold district, Guerrero, Mexico, is a Cretaceous to early Paleocene oxidized Fe-Au skarn deposit, genetically associated with an adakitic magmatic event of 63+/-2 Ma, dated by ion-probe U/Pb on zircons. The inner and outer alteration patterns and the mineralogical sequence (high garnet/pyroxene ratio, high ferric/ferrous ratio >1, predominance of Fe-poor garnet and pyroxene, low total sulfides) found in Mezcala are compatible with the description of an oxidized gold skarn type. Carbon and oxygen isotope analyses of the inner calcite zone (-9.98 to -11.64 and +13.21 to +14.59parts per thousand, respectively) unequivocally support a magmatic signature of the hydrothermal fluid. Carbon and oxygen isotopes from the outer calcite zone (-8.81 to +3.45 and +12.95 to +22.77parts per thousand, respectively) suggest a complex mechanism of degassing and subsequent cooling/dilution of the resulting magmatic brine with the meteoric water. Gold appears to be closely associated with the adakite stock, whereas its transport is related with the outflow of highly oxidized magmatic brines from the intrusion. The gold precipitation is triggered by cooling/dilution of the degassed magmatic brine by the meteoric fluids MH - France MH - Mexico|Queretaro PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0026-4598 UR - ISI:000221343800003 L2 - Fe-Au skarn;C-O stable isotope;U/Pb dating;Paleocene;Mexico;CARBON DIOXIDE; GOLD; DEPOSITS; OXYGEN; MAGMATISM; CALCITE; FLUIDS; BELT SO - Mineralium Deposita 2004 ;39(3):301-312 11398 UI - 6415 AU - Ley C AU - Mohar A AU - Guarner J AU - Herrera-Goepfert R AU - Figueroa LS AU - Halperin D AU - Johnstone I AU - Parsonnet J AD - Stanford Univ, Sch Med, Div Epidemiol, Dept Hlth Res & Policy, Stanford, CA 94305, USAStanford Univ, Dept Stat, Stanford, CA 94305, USAStanford Univ, Dept Med, Div Infect Dis & Geog Med, Stanford, CA 94305, USAInst Nacl Cancerol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mexico City 04510, DF, MexicoCtr Dis Control & Prevent, Infect Dis Pathol, Atlanta, GA, USAEl Colegio Frontera Sur, Div Poblac & Salud, Chiapas, MexicoParsonnet, J, Stanford Univ, Sch Med, Div Epidemiol, Dept Hlth Res & Policy, Grant Bldg,Room S156,300 Pasteur Dr, Stanford, CA 94305 USA TI - Helicobacter pylori eradication and gastric preneoplastic conditions: A randomized, double-blind, placebo-controlled trial AB - Helicobacter pylori causes gastric adenocarcinoma; whether treatment of H. pylori infection prevents this cancer remains unknown. In a randomized, double-blind, placebo-controlled trial of H. pylori eradication, we determined whether treatment for H. pylori decreases gastric cancer risk, using preneoplastic conditions as surrogate markers. A total of 248 healthy volunteers (age >40 years) randomly received H. pylori treatment (omeprazole, amoxicillin, clarythromycin; n = 122) or matched placebo (n = 126) for 1 week. Endoscopy was performed at baseline and at 6 weeks and 1 year. Seven biopsies from each endoscopy were reviewed by two pathologists using the revised Sydney classification. Outcome measures were both a consensus "worst biopsy" diagnosis and a weighted index score that incorporated degrees of severity of preneoplasia from all biopsies. We compared change in these outcomes over time between the two treatment groups. H. pylori cure rates for compliant subjects in the treatment arm were 79.2% and 75.7% at 6 weeks and 1 year, respectively. No statistically significant change in the worst biopsy diagnosis was observed from 6 weeks to 1 year between placebo and treated subjects (for improvement/worsening, placebo, 19.4%/10.5%; treatment, 22.5%/8.3%; P = 0.74). Change in index score was favorably greater in treatment compared with placebo subjects (intention-to-treat analysis, P = 0.03); this finding was particularly evident in the antrum. H. pylori eradication gave more favorable gastric histopathologies over 1 year than no treatment MH - USA MH - Mexico|Chiapas MH - Mexico|Distrito Federal PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 43 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1055-9965 UR - ISI:000188438300004 L2 - INTESTINAL METAPLASIA; HIGH-RISK; QUANTITATIVE ASSESSMENT; PRECANCEROUS LESIONS; NATURAL-HISTORY; STOMACH-CANCER; FOLLOW-UP; INFECTION; POPULATION; CLASSIFICATION SO - Cancer Epidemiology Biomarkers & Prevention 2004 ;13(1):4-10 11399 UI - 5536 AU - Lezama-Pacheco J AU - de Leon JM AU - Espinosa FJ AU - Rabago F AU - Conradson S AD - CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoUniv Marista Merida, Merida 97300, Yucatan, MexicoUASLP, Inst Fis, San Luis Potosi 78240, SLP, MexicoLos Alamos Natl Lab, Struct & Properties Grp, Los Alamos, NM 87545, USAde Leon, JM, CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, Mexico TI - Local atomic structure around iodine in ZnSe : I AB - We determined the local atomic structure around iodine dopant atoms in single-crystal samples of ZnSe:I by means of X-ray absorption fine structure (XAFS). X-ray diffraction studies show that the introduction of iodine at these concentrations (0.08 at%), produces no other phases and that the average crystalline Structure remains the same as that of pure ZnSe. XAFS results show that the iodine enters into the ZnSe lattice substituting Se. An increase in the I-Zn distance was observed compared to the Se-Zn distance in undoped ZnSe, while the second-neighbor distance was the same as that found in undoped ZnSe. These results contrast with those found in other doped semiconductors such as CdTe:In, CdTe:Cu, and. noteworthy ZnSe:Cl. In those cases, Lit this dopant levels the local structure around the dopant atoms shows a significant lattice distortion, signaled by two different bond lengths to the nearest-neighbor atoms, Suggesting the formation of a dopant-cation vacancy complex defect. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|San Luis Potosi MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000221289000015 L2 - II-VI-doped semiconductors;ZnSe;local atomic structure;XAFS;ABSORPTION FINE-STRUCTURE; LATTICE INSTABILITY; CDTE SO - Solar Energy Materials and Solar Cells 2004 ;82(1-2):151-157 11400 UI - 5692 AU - Li QZ AU - Lopez IFV AU - Moon B AD - Univ Arizona, Dept Comp Sci, Tucson, AZ 85721, USAUniv Autonoma Sinaloa, Escuela Informat, Culiacan, Sinaloa, MexicoLi, QZ, Univ Arizona, Dept Comp Sci, Tucson, AZ 85721, USA TI - Skyline index for time series data AB - We have developed a new indexing strategy that helps overcome the curse of dimensionality for time series data. Our proposed approach, called Skyline Index, adopts new Skyline Bounding Regions (SBR) to approximate and represent a group of time series data according to their collective shape. Skyline bounding regions allow us to define a distance function that tightly lower bounds the distance between a query and a group of time series data. In an extensive performance study, we investigate the impact of different distance functions by various dimensionality reduction and indexing techniques on the performance of similarity search, including index pages accessed, data objects fetched, and overall query processing time. In addition, we show that, for kappa-nearest neighbor queries, the proposed Skyline index approach can be coupled with the state of the art dimensionality reduction techniques such as Adaptive Piecewise Constant Approximation ( APCA) and improve its performance by up to a factor of 3 MH - Mexico|Sinaloa MH - USA PB - LOS ALAMITOS: IEEE COMPUTER SOC RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Artificial Intelligence;Computer Science, Information Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1041-4347 UR - ISI:000220977900003 L2 - data approximation;dimensionality reduction;similarity search;skyline bounding region;skyline index;time series data;SEQUENCES; DATABASES; QUERIES SO - Ieee Transactions on Knowledge and Data Engineering 2004 ;16(6):669-684 11401 UI - 4110 AU - Li XH AU - Li DM AU - Ma ZJ AU - Zhai TQ AU - Drummond H AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoCrested Ibis Conservat Stn, Shaanxi 723300, Peoples R ChinaFudan Univ, Inst Biodivers, Shanghai 200433, Peoples R ChinaChinese Acad Sci, Inst Zool, State Key Lab Integrated Management Pest Insects, Beijing 100080, Peoples R ChinaDrummond, H, Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, Mexico TI - Ritualized aggression and unstable dominance in broods of crested ibis (Nipponia nippon) AB - In broods of Crested Ibis (Nipponia nippon), aggressive dominance was unstable over time, even within feeding sessions. All chicks took turns pecking aggressively while broodmates hung their heads submissively, although roles were contested at the start of feeding bouts when chicks were 11-17 days old. In all broods, at least half of all pecks were false pecks, which did not strike broodmates even when within reach. False pecks seem to be ritualized displays that function to solicit food from parents and possibly to threaten rivals MH - Mexico|Distrito Federal MH - Peoples R China PB - ANN ARBOR: WILSON ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0043-5643 UR - ISI:000224499200008 L2 - BIRDS; FOOD SO - Wilson Bulletin 2004 ;116(2):172-176 11402 UI - 5913 AU - Li YP AU - Hernandez-Martinez S AU - Noriega FG AD - Florida Int Univ, Dept Biol Sci, Miami, FL 33199, USAInst Nacl Salud Publ, Ctr Invest Sobre Enfermedades Infecciosas, Cuernavaca 62508100, Morelos, MexicoNoriega, FG, Florida Int Univ, Dept Biol Sci, OE 167,11200 SW 8TH ST, Miami, FL 33199 USA TI - Inhibition of juvenile hormone biosynthesis in mosquitoes: effect of allatostatic head factors, PISCF- and YXFGL-amide-allatostatins AB - We investigated the role of head factors and allatostatins (ASs) on the regulation of juvenile hormone (JH) synthesis in female adult mosquito. The biosynthetic activity of the Aedes aegypti corpora allata (CA) in vitro was inhibited by factors present in the head. Disconnecting the CA from the brain resulted in a significant increase in the rate of JH biosynthesis. Inhibition was not dependent on intact nervous connections; co-incubation of CA with brains or brain extracts resulted in a significant decrease of JH biosynthesis. This inhibitory effect of brain extracts was reversible and heat stable; extracts lost the inhibitory activity after proteinase K digestion suggesting a peptidic structure. In a first attempt to elucidate the nature of this inhibitory factor, we tested in our CA in vitro system the effect of members of two families of allatostatins already described in mosquitoes. Anopheles gambiae PISCF-allatostatin (homolog to Manduca PISCF-allatostatin) significantly inhibited JH synthesis, while Ae. aegypti YXFGL-amide-allatostatins (homologs to cockroach YXFGL-amide-allatostatins) did not affect JH synthesis. These results represent the first description of an allatostatic effect of PISCF-allatostatins outside the Lepidoptera. (C) 2004 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Endocrinology & Metabolism;Physiology U5 - J;Article AV - English IS - 0167-0115 UR - ISI:000220320300008 L2 - Aedes aegypti;mosquito;juvenile hormone;corpora allata;allatostatin;FEMALE AEDES-AEGYPTI; CORPORA ALLATA; DIPLOPTERA-PUNCTATA; IN-VITRO; IDENTIFICATION; INVITRO; ACID; NEUROPEPTIDES; ALLATOTROPIN; STIMULATION SO - Regulatory Peptides 2004 ;118(3):175-182 11403 UI - 6134 AU - Li Z AU - Samuel AM AU - Samuel FH AU - Ravindran C AU - Valtierra S AU - Doty HW AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, Gen Motors Powertrain Grp, Milford, NH 03055, USACorporativo Nemak, Res & Dev, Garza Garcia 66221, NL, MexicoRyerson Univ, Dept Mech Aerosp & Ind Engn, Toronto, ON M5B 2K3, CanadaSamuel, AM, Univ Quebec, Dept Appl Sci, 555 Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada TI - Parameters controlling the performance of AA319-type alloys Part I. Tensile properties AB - Al-Si-Cu AA319 alloy was selected for study in the present work due to its wide use in many automotive applications. in addition to the variation in the secondary dendrite arm spacing (SDAS), porosity level and the type of heat treatment applied, the presence/addition of certain alloying elements or modifiers to these alloys is known to greatly affect their mechanical properties. An extensive study was carried out to investigate the solidification and dissolution behavior of the CuAl2 phase in various AA319-type alloys (containing Sr, Fe and P element additions) and its effect on the alloy performance under two different heat treatment conditions (T5 and T6). Part I of this article reports on the tensile properties of these alloys. The tensile test samples were prepared from blanks sectioned from end-chilled castings, corresponding to dendrite arm spacings ranging from 23 to 83 mum. It was found that strontium modification leads to a fibrous eutectie Si morphology, resulting in a great increase in the ultimate tensile strength (UTS) and ductility values compared to the unmodified alloys. On the other hand, Sr addition also causes segregation of the blocky CuAl2 phase, which results in reducing the tensile properties. However, dissolution of CuAl2 Particles after T6 heat treatment can minimize this kind of negative effect. Iron has a detrimental effect on the UTS and ductility values due to its precipitation in the form of the brittle beta-Al5FeSi plate-like phase. The addition of phosphorus has a negative effect on the tensile properties on account of (i) its solubility in CuAl2, and (ii) the formation of (Al,P)O-2 oxide particles, where the latter act as nucleation sites for the formation of the CuAl2 phase. (C) 2003 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000189132200013 L2 - AA319-type alloys;tensile properties;CuAl2;effect of Sr, Fe, P, T5, T6 heat treatments;POROSITY FORMATION; INTERMETALLICS; CASTINGS; FE SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;367(1-2):96-110 11404 UI - 6135 AU - Li Z AU - Samuel AM AU - Samuel FH AU - Ravindran C AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaCorporativo Nemak, Res & Dev, Garza Garcia 66221, NL, MexicoGM Powertrain, Met Casting Technol, Milford, NH, USARyerson Univ, Dept Mech Aerosp & Ind Engn, Toronto, ON M5B 2K3, CanadaSamuel, AM, Univ Quebec, Dept Appl Sci, 555 Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada TI - Parameters controlling the performance of AA319-type alloys Part II. Impact properties and fractography AB - The Charpy impact energy of Al-Si-Cu AA319-type alloys was measured in terms of the total absorbed energy. The Charpy specimens were machined from end-chilled castings to incorporate the effect of cooling rate on the impact properties. Unnotched specimens were used to increase the accuracy of the measurements, and to emphasize the effect of microstructure. The influence of the microconstituents on the impact strength was investigated by adding various alloying elements (i.e. Sr, Fe, and P) to the AA319 base alloy, and applying two different heat treatments (T5, and T6). The results show that strontium-modification enhances the impact properties, so that the Sr-modified AA319 alloy exhibits the highest impact properties compared to the base, and other alloys at any given dendrite arm spacing (DAS). The impact energy increases with increase in cooling rate, while iron, and phosphorus additions have a detrimental influence due, respectively, to the formation of beta-Al5FeSi, and phosphorus oxide particles during solidification. T6 treatment assists in the even distribution, and dissolution of the microconstituents (including the block-like CuAl2 particles) into the aluminum matrix. With more Cu available for strengthening during aging, the impact toughness is greatly enhanced. In the unmodified AA319 base alloy, crack initiation, and propagation occur mainly through Si-particle fracture, and the mechanism of void coalescence. In the Sr-modified, 1.2% Fe-containing 319 alloys, however, crack initiation takes place through fragmentation of beta-Al5FeSi, Si, and CuAl2 or Cu2FeAl7 particles. Crack propagation occurs through cleavage of the beta-Fe platelets, and fracture of the Cu-intermetallics, and brittle Si particles. Such samples exhibit very low impact energies. (C) 2003 Elsevier B.V All rights reserved MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000189132200014 L2 - AA319 alloys;charpy impact energy;fractography;effect of Sr, Fe, and P;T5, and T6 heat treatments SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;367(1-2):111-122 11405 UI - 5302 AU - Li ZP AU - Michel E AU - Machado LF AU - Alvarez M AU - Chevreton M AU - Hernandez MM AU - Zhou AY AU - Barban C AU - Dolez N AU - Belmonte JA AU - Fernandez A AU - Fremy JR AU - Pau S AU - Servan B AU - Hernandez FP AU - Jiang SY AU - Liu ZL AU - Ringot O AU - Suarez JC AU - Xu Y AD - Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R ChinaObserv Paris, LESIA, UMR 8109, F-92195 Meudon, FranceInst Astrofis Canarias, Tenerife 38200, SpainUNAM, Inst Astron, Ensenada, Baja California, MexicoObserv Midi Pyrenees, LAT, UMR 5572, F-31400 Toulouse, FranceObserv Paris, GEPI, FRE 2459, F-92195 Meudon, FranceNatl Solar Observ, Tucson, AZ 85719, USAUniv La Laguna, Dept Astrofis, Tenerife, SpainLi, ZP, Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China TI - 9+ frequencies for V534 Tauri, a delta Scuti variable in the Pleiades - Results of the STEPHI IX campaign AB - New observations of V534 Tau were performed during the STEPHI IX campaign in November 1998. An overall run of 285 h of data has been collected from three sites over a period of 23 days. Period analysis reveals a rich oscillation spectrum with nine frequencies above the 99% confidence level. This oscillation spectrum spans a large range of frequencies, from 179 to 525 muHz (15.52 to 45.36 cycles per day). A preliminary comparison with models suggests that the observed modes would lie in the range of modes from g(1) or g(2) to P-4 or p(5), depending on the rotation rate considered for V534 Tau MH - France MH - Mexico|Baja California MH - Peoples R China MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000221934200028 L2 - galaxy : open clusters and associations : general;stars : variables : delta sct;stars : oscillations;stars : individuals : V534 Tau;OPEN CLUSTERS; PRAESEPE CLUSTER; BETA PHOTOMETRY; STARS; CALIBRATIONS; PARAMETERS; PULSATION SO - Astronomy & Astrophysics 2004 ;420(1):283-287 11406 UI - 4139 AU - Liao XF AU - Chen GR AU - Sanchez EN AD - Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R ChinaCity Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R ChinaCINVESTAV, Unidad Guadalajara, Guadalajara 45090, Jalisco, MexicoLiao, XF, Chongqing Univ, Dept Comp Sci & Engn, Chongqing 400044, Peoples R China TI - LMI-based approach for asymptotically stability analysis of delayed neural networks (Vol 49, pg 1033, 2002) MH - Mexico|Jalisco MH - Peoples R China PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Correction AV - English IS - 1057-7122 UR - ISI:000224476100018 SO - Ieee Transactions on Circuits and Systems I-Regular Papers 2004 ;51(10):2107-2107 11407 UI - 5723 AU - Licea-Claverie A AU - Rogel-Hernandez E AU - Salgado-Rodriguez R AU - Lopez-Sanchez JA AU - Castillo LA AU - Cornejo-Bravo JM AU - Arndt KF AD - Inst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22000, BC, MexicoUniv Autonoma Baja California, Fac Ciencias Quim & Ingn, Tijuana 22300, BC, MexicoTech Univ Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, GermanyLicea-Claverie, A, Inst Tecnol Tijuana, Ctr Grad & Invest, AP 1166, Tijuana 22000, BC, Mexico TI - The use of hydrophobic spacers in the development of new temperature- and pH-sensitive polymers AB - The preparation and characterization of two series of methacrylic acid derivative polymers is described. One series contains aliphatic spacers with one to ten methylene units, while the other series includes an aromatic ring with changes in the position of the acid, as spacer. Both series of polymers were obtained as methoxy-ester protected acid polymers and as polymers containing free acid groups in different amounts. pH-sensitive gels and temperature-sensitive N-isopropylacrylamide (NIPAAm) copolymers were prepared by using some of the monomeric structures described. The pH of the swelling transition of the gels changed from 3.5 up to 9.0 as a function of the spacer length and type. The lower critical solution temperature (LCST) of NIPAArn copolymers in water was lowered from 33.6 degreesC to 6 degreesC as a function of the co-monomer content and type. The observed changes in the pH of the swelling transition of gels and in the LCST of NIPAAm copolymers can only be explained if hydrophobic-hydrophobic and hydrogen-bonding interactions are considered in connection with the specific chemical structure of the monomers used MH - Germany MH - Mexico|Baja California PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1360 UR - ISI:000220776800019 L2 - GELS; POLYELECTROLYTES; BEHAVIOR; WATER; ACID) SO - Macromolecular Symposia 2004 ;207():193-215 11408 UI - 4944 AU - Lillemo M AU - van Ginkel M AU - Trethowan RM AU - Hernandez E AU - Rajaram S AD - Agr Univ Norway, Dept Plant & Environm Sci, N-1432 As, NorwayCIMMYT, Wheat Program, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoLillemo, M, Agr Univ Norway, Dept Plant & Environm Sci, POB 5003, N-1432 As, Norway TI - Associations among international CIMMYT bread wheat yield testing locations in high rainfall areas and their implications for wheat breeding AB - A good understanding of how the target environments for a breeding program differentiate the germplasm with respect to yield is crucial and allows plant breeders to better target their germplasm. To determine the relationships among high rainfall yield testing locations, yield data from 8 yr of CIMMYT's High Rainfall Wheat Yield Trial (HRWYT) were analyzed by shifted multiplicative model (SHMM) and incremental sum of squares (ISS) classification analyses to group sites within and across years. In the cumulative cluster analysis, about half of the sites clustered into a group characterized by increasing temperature toward maturity. The SHMM analysis identified several sites with high overall association with other sites around the world, and which can be considered as good predictors of global yield performance within the high rainfall megaenvironment. These are autumn-sown locations, which fall into the biggest group of the cumulative cluster analysis with increasing temperature during the growing season. On the other hand, remarkably low associations with global yield ranking were shown for Sta. Catalina (Ecuador) and CIMMYT's primary high rainfall yield-testing location at Toluca (Mexico), which in contrast experience decreasing temperatures toward maturity. Although excellent sites for disease screening, this analysis shows that they do not associate well with the world's high rainfall wheat growing areas for yield MH - Mexico|Distrito Federal MH - Norway PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000222582400006 L2 - SHIFTED MULTIPLICATIVE MODEL; ENVIRONMENTS SO - Crop Science 2004 ;44(4):1163-1169 11409 UI - 4379 AU - Lindner M AU - Rabinovich VS AU - Roch S AD - Tech Univ Darmstadt, Fachbereich Math, D-64289 Darmstadt, GermanyTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyInst Politecn Nacl, ESIME Zacatenco, Mexico City 07738, DF, MexicoRoch, S, Tech Univ Darmstadt, Fachbereich Math, Schlossgartenstr 7, D-64289 Darmstadt, Germany TI - Finite sections of band operators with slowly oscillating coefficients AB - The purpose of this note is to show that the finite section method for a band operator with slowly oscillating coefficients is stable if and only if the operator is invertible. This result generalizes the classical stability criterion for the finite section method for band Toeplitz operators (= the case of constant coefficients). (C) 2004 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0024-3795 UR - ISI:000223949700003 L2 - finite sections method;band operators;slowly oscillating functions;DOMINATED OPERATORS SO - Linear Algebra and Its Applications 2004 ;390():19-26 11410 UI - 4931 AU - Lindsay BG AU - McDonald KF AU - Yu WS AU - Stebbings RF AU - Yousif FB AD - Rice Univ, Dept Phys, Houston, TX 77005, USARice Univ, Rice Quantum Inst, Houston, TX 77005, USAUniv Autonoma Estado Moreles, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoLindsay, BG, Rice Univ, Dept Phys, Houston, TX 77005, USA TI - Electron-impact ionization of CCl4 and CCl2F2 AB - Absolute partial and total cross sections for electron-impact ionization of CCl4 and CCk(2)F(2) are reported for electron energies from threshold to 1000 eV. The product ions are mass analyzed using a time-of-flight mass spectrometer and detected with a position-sensitive detector whose output demonstrates that all product ion species are collected with equal efficiency irrespective of their initial kinetic energies: Data are presented for production of CCl3+, CCl2+, CCl+, C+, Cl-2(+), and CCl32+ from CCl4; and for production of CCl2F+, CClF2+, CClF+, (CCl++CF2+), Cl+, CF+, F+, and C+ from CCl2F2. Data are also reported for formation of (CCl2+,Cl+) and (CCl+,Cl+) ion pairs from CCl4. The total cross section for each target is obtained as the sum of the partial cross sections. The overall uncertainty in the absolute cross' sections for most of the singly charged ions is +/-5-7%. The present partial cross sections for lighter fragment ions are found to be considerably greater than had been previously reported but the most recent total cross section measurements agree well with those reported here. Neither the binary-encounter-Bethe theory nor the Deutsch-Mark theory reproduces the experimental cross sections correctly for both targets. (C) 2004 American Institute of Physics MH - Mexico|Morelos MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000222663300022 L2 - PARTIAL CROSS-SECTIONS; ABSOLUTE; THRESHOLD; CF4; HYDROCARBONS; MOLECULES; DETECTOR; IONS; SF6 SO - Journal of Chemical Physics 2004 ;121(3):1350-1356 11411 UI - 4113 AU - Ling HQ AU - Qiu JW AU - Singh RP AU - Keller B AD - Chinese Acad Sci, State Key Lab Plant Cell & Chromosome Engn, Inst Genet & Dev Biol, Beijing 100101, Peoples R ChinaUniv Zurich, Inst Plant Biol, CH-8008 Zurich, SwitzerlandCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoLing, HQ, Chinese Acad Sci, State Key Lab Plant Cell & Chromosome Engn, Inst Genet & Dev Biol, Datun Rd, Beijing 100101, Peoples R China TI - Identification and genetic characterization of an Aegilops tauschii ortholog of the wheat leaf rust disease resistance gene Lr1 AB - Aegilops tauschii ( goat grass) is the progenitor of the D genome in hexaploid bread wheat. We have screened more than 200 Ae. tauschii accessions for resistance against leaf rust (Puccinia triticina) isolates, which are avirulent on the leaf rust resistance gene Lr1. Approximately 3.5% of the Ae. tauschii accessions displayed the same low infection type as the tester line Thatcher Lr1. The accession Tr. t. 213, which showed resistance after artificial infection with Lr1 isolates both in Mexico and in Switzerland, was chosen for further analysis. Genetic analysis showed that the resistance in this accession is controlled by a single dominant gene, which mapped at the same chromosomal position as Lr1 in wheat. It was delimited in a 1.3-cM region between the restriction fragment length polymorphism ( RFLP) markers ABC718 and PSR567 on chromosome 5DL of Ae. tauschii. The gene was more tightly linked to PSR567 (0.47 cM) than to ABC718 (0.79 cM). These results indicate that the resistance gene in Ae. tauschii accession Tr. t. 213 is an ortholog of the leaf rust resistance gene Lr1 of bread wheat, suggesting that Lr1 originally evolved in diploid goat grass and was introgressed into the wheat D genome during or after domestication of hexaploid wheat. Compared to hexaploid wheat, higher marker polymorphism and recombination frequencies were observed in the region of the Lr1 ortholog in Ae. tauschii. The identification of Lr1Ae, the orthologous gene of wheat Lr1, in Ae. tauschii will allow map-based cloning of Lr1 from this genetically simpler, diploid genome MH - Mexico|Distrito Federal MH - Peoples R China MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000224614100004 L2 - HEXAPLOID WHEAT; D-GENOME SO - Theoretical and Applied Genetics 2004 ;109(6):1133-1138 11412 UI - 4052 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Stenson K AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Paris A AU - Quinones J AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Bryant AD AU - Engh D AU - Hosack M AU - Johns WE AU - Luiggi E AU - Nehring M AU - Sheldon PD AU - Vdandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Leon 37150, Guanajuato, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAEdera, L, Univ Calif Davis, Davis, CA 95616, USA TI - Study of the doubly and singly Cabibbo suppressed decays D+ -> K+pi(+)pi(-) and D-s(+) -> K+pi(+)pi(-) AB - Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we study the doubly and singly Cabibbo suppressed decays D+ and D-S(+) --> K(+)pi(+)pi(-). Our measurements of Gamma(D+ --> K(+)pi(+)pi(-))/Gamma(D+ --> K(-)pi(+)pi(+)) = 0.0065 +/- 0.0008 +/- 0.0004 and Gamma(D-s(+) --> K(+)pi(+)pi(-))/Gamma(D+ --> K(+)K(-)pi(+)) = 0.127 +/- 0.007 +/- 0.014 are based on samples of 189 +/- 24 D+ and 567 +/- 31 D-s(+) reconstructed events, respectively. We also present Dalitz plot analyses of the two decay channels; the amplitude analysis of the D-S(+) --> K(+)pi(+)pi(-) mode is performed for the first time. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000224620900002 L2 - DALITZ PLOTS; D-0 SO - Physics Letters B 2004 ;601(1-2):10-19 11413 UI - 4433 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Stenson K AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Paris A AU - Quinones J AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Bryant AD AU - Engh D AU - Hosack M AU - Johns WE AU - Luiggi E AU - Nehring M AU - Sheldon PD AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAUniv Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20133 Milan, ItalyUniv N Carolina, Asheville, NC 28804, USADipartimento Fis Teorica & Nucl, Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAUniv Wisconsin, Madison, WI 53706, USAJohns, WE, Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr, Nashville, TN 37235 USA TI - Measurement of the ratio of the vector to pseudoscalar charm semileptonic decay rate Gamma(D+ ->(K)over-bar(*0)mu+v(mu))/Gamma(D+->(K)over-bar(0) (+)(mu)v(mu)) AB - Using a high statistics sample of photo-produced charm particles from the FOCUS experiment at Fermilab, we report on the measurement of the ratio of semileptonic rates Gamma(D+ --> Kpimu(+)nu(mu))/Gamma(D+ --> K(0)mu(+)nu(mu)) = 0.625 +/- 0.045 +/- 0.034. Allowing for the Kpi S-wave interference measured in [J.M. Link, et al., FOCUS Collaboration, Phys. Lett. B 544 (2002) 89], we extract the vector to pseudoscalar ratio Gamma(D+ --> (K) over bar*(0)mu(+)nu(mu))/Gamma(D+ --> (K) over bar (0)mu(+)nu(mu)) = 0.594 +/- 0.043 +/- 0.033 and the ratio Gamma(D+ --> (K) over bar (0)mu(+)numu)/Gamma(D+ --> (K) over bar (-)pi(+)pi(+)) = 1.019 +/- 0.076 +/- 0.065. Our results show a lower ratio for F(D --> K* lv)/Gamma(D --> Klv) than has been reported recently and indicate the current world average branching fractions for the decays D+ --> (K) over bar (0)(mu(+), e(+))nu(mu,e) are low. Using the world average B(D+ --> K(-)pi(+)pi(+)) [K. Hagiwara, et al., Particle Data Group Collaboration, Phys. Rev. D 66 (2002) 010001, and 2003 partial update for edition 2004 (http://pdg.lbl.gov)] we extract B(D+ --> (K) over bar (0)mu(+)nu) = (9.27 +/- 0.69 +/- 0.59 +/- 0.61)%. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000223870100004 L2 - HEAVY MESONS; QUARK-MODEL; LIGHT MESONS; FORM-FACTORS; B-MESONS; QCD; SPECTROMETER; FLAVORS; LATTICE; FOCUS SO - Physics Letters B 2004 ;598(1-2):33-41 11414 UI - 5652 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez C AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - Jacobs J AU - O'Reilly B AU - Segoni I AU - Stenson K AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Paris A AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Luiggi E AU - Nehring M AU - Sheldon PD AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesuisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAIst Nazl Fis Nucl, I-27100 Pavia, ItalyDipartimento Fis Teorica & Nucl, Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - New measurements of the D-s(+) -> phi mu(+)nu form factor ratios AB - Using a large sample of D-S(+) --> phimu(+)nu decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic form factor ratios: r(nu) and r(2). We find r(nu) = 1.549 +/- 0.250 +/- 0.148 and r(2) = 0.713 +/- 10.202 +/- 0.284. These values are consistent with r(nu) and r(2) form factors measured for the process D+ --> (K) over bar*(())l(+)nu(e). (C) 2004 Published by Elsevier B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000220942200005 L2 - MESON DECAYS SO - Physics Letters B 2004 ;586(3-4):183-190 11415 UI - 5653 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - Jacobs J AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAIst Nazl Fis Nucl, I-27100 Pavia, ItalyDipartimento Fis Teorica & Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Study of hadronic five-body decays of charmed mesons involving K-S(0) MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000220942200006 L2 - SPECTROMETER; MODES; FOCUS; D0 SO - Physics Letters B 2004 ;586(3-4):191-197 11416 UI - 5758 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20122 Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurement of masses and widths of excited charm mesons D-2(*) and evidence for broad states AB - Using data from the FOCUS experiment we analyze the D(+)pi(-) and D(0)pi(+) invariant mass distributions. We measure the D-2(*0) mass M-D2*0 (2464.5 +/- 1.1 +/- 1.9) MeV/c(2) and width GammaD(2*0) = (38.7 +/- 5.3 +/- 2.9) MeV/c(2) and the D-2(*+) mass MD2*+ = (2467.6 +/- 1.5 +/- 0.76) MeV/c(2) and width GammaD(2*+) = (34.1 +/- 6.5 +/- 4.2) MeV/c(2). We find evidence for broad structures over background in both the neutral and charged final state. If each is interpreted as evidence for a single L = 1, j(q) = 1/2 excited charm meson resonance, the masses and widths are M-1/2(0) (2407 +/- 21 +/- 35) MeV/c(2), Gamma(1/2)(0) (240 +/- 55 +/- 59) MeV/c(2) M-1/2(+) = (2403 +/- 14 +/- 35) MeV/c(2), Gamma(1/2)(+) = (283 +/- 24 +/- 34) MeV/c(2), respectively. (C) 2004 Published by Elsevier B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 48 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000220676700003 L2 - HEAVY-QUARK; SPECTROSCOPY; SPECTROMETER; MODEL; FOCUS SO - Physics Letters B 2004 ;586(1-2):11-20 11417 UI - 5759 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Bryant AD AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20122 Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Measurements of six-body hadronic decays of the D-0 charmed MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000220676700004 L2 - MESONS SO - Physics Letters B 2004 ;586(1-2):21-26 11418 UI - 5808 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Ist Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20122 Milan, ItalyUniv Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAMalvezzi, S, Ist Nazl Fis Nucl, Via Celoria 16, I-20133 Milan, Italy TI - Dalitz plot analysis of D-s(+) and D+ decay to pi(+) pi(-) pi(+) using the K-matrix formalism AB - FOCUS results from Dalitz plot analyses of D-s(+) and D+ to pi(+)pi(-)pi(+) are presented. The K-matrix formalism is applied to charm decays for the first time, which allows us to fully exploit the already existing knowledge coming from light-meson spectroscopy experiments. In particular all the measured dynamics of the S-wave pipi scattering, characterized by broad/overlapping resonances and large non-resonant background, can be properly included. This Letter studies the extent to which the K-matrix approach is able to reproduce the observed Dalitz plot and thus help us to understand the underlying dynamics. The results are discussed along with their possible implications for the controversial sigma meson. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000220574000002 L2 - amplitude analysis;charm decay;light scalars SO - Physics Letters B 2004 ;585(3-4):200-212 11419 UI - 6313 AU - Link JM AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Machado AA AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - Polycarpo E AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Vazquez F AU - Uribe C AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Segoni I AU - Wahl M AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Wang M AU - Benussi L AU - Bertani M AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Reyes M AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - Cerutti A AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Pegna DL AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Luiggi E AU - Mendez H AU - Paris A AU - Ramirez JE AU - Zhang Y AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Vaandering EW AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, RJ, BrazilCINVESTAV, Mexico City 07000, DF, MexicoIFUAP, Puebla 72570, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Guanajuato, Guanajuato 37150, MexicoUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, I-20122 Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USALink, JM, Univ Calif Davis, Davis, CA 95616, USA TI - Charm-anticharm baryon production asymmetries in photon-nucleon interactions AB - We report measurements of the charm-anticharm production asymmetries for Lambda(c)(+), Sigma(c)(++), Sigma(c)(0), Sigma(c)(++)*, Sigma(c)(0)*, and Lambda(c)(+)(2625) baryons from the Fermilab photoproduction experiment FOCUS (E831). These asymmetries are integrated over the region where the spectrometer has good acceptance. In addition, we have obtained results for the photoproduction asymmetries of the Lambda(c) baryons as functions of p(L), p(T)(2) and x(F). The integrated asymmetry for Lambda(c)(+) production, (sigma(Lambdac)+ - sigma(Lambdac)-) /(sigma(Lambdac)+ - sigma(Lambdac)-), is 0.111 +/- 0.018 +/- 0.012, significantly different from zero. The asymmetries of the excited states' are consistent with the Lambda(c) asymmetry. (C) 2004 Published by Elsevier B.V MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Mexico|Puebla MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000188698200005 L2 - PHOTOPRODUCTION SO - Physics Letters B 2004 ;581(1-2):39-48 11420 UI - 6486 AU - Link JM AU - Reyes M AU - Yager PM AU - Anjos JC AU - Bediaga I AU - Gobel C AU - Magnin J AU - Massafferri A AU - de Miranda JM AU - Pepe IM AU - dos Reis AC AU - Carrillo S AU - Casimiro E AU - Cuautle E AU - Sanchez-Hernandez A AU - Uribe C AU - Vazquez F AU - Agostino L AU - Cinquini L AU - Cumalat JP AU - O'Reilly B AU - Ramirez JE AU - Segoni I AU - Butler JN AU - Cheung HWK AU - Chiodini G AU - Gaines I AU - Garbincius PH AU - Garren LA AU - Gottschalk E AU - Kasper PH AU - Kreymer AE AU - Kutschke R AU - Benussi L AU - Bianco S AU - Fabbri FL AU - Zallo A AU - Cawlfield C AU - Kim DY AU - Rahimi A AU - Wiss J AU - Gardner R AU - Kryemadhi A AU - Chung YS AU - Kang JS AU - Ko BR AU - Kwak JW AU - Lee KB AU - Cho K AU - Park H AU - Alimonti G AU - Barberis S AU - Boschini M AU - D'Angelo P AU - DiCorato M AU - Dini P AU - Edera L AU - Erba S AU - Giammarchi M AU - Inzani P AU - Leveraro F AU - Malvezzi S AU - Menasce D AU - Mezzadri M AU - Milazzo L AU - Moroni L AU - Pedrini D AU - Pontoglio C AU - Prelz F AU - Rovere M AU - Sala S AU - Davenport TF AU - Arena V AU - Boca G AU - Bonomi G AU - Gianini G AU - Liguori G AU - Merlo MM AU - Pantea D AU - Ratti SP AU - Riccardi C AU - Vitulo P AU - Hernandez H AU - Lopez AM AU - Mendez H AU - Mendez L AU - Montiel E AU - Olaya D AU - Paris A AU - Quinones J AU - Rivera C AU - Xiong W AU - Zhang Y AU - Purohit M AU - Copty N AU - Wilson JR AU - Handler T AU - Mitchell R AU - Engh D AU - Helms RW AU - Hosack M AU - Johns WE AU - Nehring M AU - Sheldon PD AU - Stenson K AU - Webster M AU - Sheaff M AD - Univ Calif Davis, Davis, CA 95616, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilCINVESTAV, Mexico City 07000, DF, MexicoUniv Colorado, Boulder, CO 80309, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyUniv Illinois, Urbana, IL 61801, USAIndiana Univ, Bloomington, IN 47405, USAKorea Univ, Seoul 136701, South KoreaKyungpook Natl Univ, Taegu 702701, South KoreaIst Nazl Fis Nucl, I-20133 Milan, ItalyUniv Milan, Milan, ItalyUniv N Carolina, Asheville, NC 28804, USAUniv Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, ItalyIst Nazl Fis Nucl, I-27100 Pavia, ItalyUniv Puerto Rico, Mayaguez, PR 00681, USAUniv S Carolina, Columbia, SC 29208, USAUniv Tennessee, Knoxville, TN 37996, USAVanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAUniv Wisconsin, Madison, WI 53706, USAJohns, WE, Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr, Nashville, TN 37235 USA TI - The target silicon detector for the FOCUS spectrometer AB - We describe a silicon microstrip detector interleaved with segments of a beryllium oxide target which was used in the FOCUS photoproduction experiment at Fermilab. The detector was designed to improve the vertex resolution and to enhance the reconstruction efficiency of short-lived charm particles. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Italy MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 17 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000188083200012 L2 - silicon detector;track data analysis;pattern recognition;lifetime;PERFORMANCE; TEVATRON SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2004 ;516(2-3):364-376 11421 UI - 4209 AU - Linss V AU - Rodil SE AU - Reinke P AU - Garnier MG AU - Oelhafen P AU - Kreissig U AU - Richter F AD - TU Chemnitz, Inst Phys, D-09107 Chemnitz, GermanyUNAM, Inst Investigac & Mat, Mexico City, DF, MexicoUniv Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904, USADept Phys & Astron, CH-4056 Basel, SwitzerlandForschungszentrum Rossendorf EV, D-01314 Dresden, GermanyLinss, V, TU Chemnitz, Inst Phys, D-09107 Chemnitz, Germany TI - Bonding characteristics of DC magnetron sputtered B-C-N thin films investigated by Fourier-transformed infrared spectroscopy and X-ray photoelectron spectroscopy AB - B-C-N thin films of a wide composition range were deposited by reactive DC magnetron sputtering of targets with different B/C ratios in an Ar/N-2 atmosphere. The bonding characteristics of these amorphous films were investigated by Fourier-transformed infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results of both characterisation methods indicate that real ternary compounds in which all three elements are bonded to each other are only formed when at least one element has a low concentration in the film-and therefore could be considered as an impurity. Otherwise the deposited material tends to a phase separation into binary compounds and single phases. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 11 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000224185100012 L2 - BCN;bonding characteristics;Fourier-transformed infrared spectroscopy (FTIR);X-ray photoelectron spectroscopy (XPS);CARBON NITRIDE FILMS; PULSED-LASER DEPOSITION; AMORPHOUS-CARBON; MECHANICAL-PROPERTIES; STRUCTURAL-PROPERTIES; BORON-CARBIDE; PLASMA CVD; NITROGEN; COATINGS; ABLATION SO - Thin Solid Films 2004 ;467(1-2):76-87 11422 UI - 3524 AU - Lipari S AU - Mediavilla E AU - Garcia-Lorenzo B AU - Diaz RJ AU - costa-Pulido J AU - Aguero MP AU - Taniguchi Y AU - Dottori H AU - Terlevich R AD - Cordoba Observ, RA-5000 Cordoba, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-5000 Cordoba, ArgentinaInst Astrofis Canarias, Tenerife 38205, SpainTohoku Univ, Inst Astron, Sendai, Miyagi 9808578, JapanUniv Fed Rio Grande Sul, Inst Fis, BR-15051 Porto Alegre, RS, BrazilAstron Inst, Cambridge CB3 0HA, EnglandINAOE, Puebla, MexicoLipari, S, Cordoba Observ, Laprida 854, RA-5000 Cordoba, Argentina TI - Infrared mergers and infrared quasi-stellar objects with galactic winds - II. NGC 5514: two extranuclear starbursts with LINER properties and a supergiant bubble in the rupture phase AB - A study of the morphology, kinematics and ionization structure of the infrared (IR) merger NGC5514 is presented. This study is based mainly on INTEGRAL two-dimensional (2D) spectroscopy (obtained at the 4.2-m William Herschel Telescope, WHT), plus optical and near-IR images. Clear evidence of two extranuclear starbursts with young outflows (OFs) and low-ionization nuclear emission region (LINER) activity are reported. One of these OFs has generated a supergiant bubble and the other is associated with an extended complex of H II regions. In the galactic bubble it was found that: (i) the [S II], Halpha, [N II], [O I] and [O III] emission-line maps show a bubble with a distorted ellipsoidal shape, with major and minor axes of similar to6.5 kpc [13.6 arcsec; at position angle (PA) = 120degrees +/- 10degrees] and similar to4.5 kpc (9.6 arcsec); (ii) these maps depict four main knots, a very strong one and three others more compact and located at the border; (iii) the centre of the bubble is located at similar to4.1 kpc (8.5 arcsec) to the west of the main nucleus; (iv) the WHT spectra show, in this area, two strong components: blue and red emission-line systems, probably associated with emission from the near and far side of the external shell, for which the mean OF velocities were measured as V-OFblue = (-320 +/- 20) km s(-1) and V-OFred = (+265 +/- 25) km s(-1); (v) these two components depict LINER properties, probably associated with large-scale OF + shocks; (vi) at the east border, the kinematics of the ionized gas and the [S II] emission-line maps show an extended ejection of 4 kpc aligned with the PA of the major axis; (vii) three other ejections were found, two of them perpendicular to the extended one. Each ejection starts in one of the knots. These results suggest that the bubble is in the rupture phase. For the complex of giant H II regions it was found that: (i) the Halpha, [N II] and [S II] emission-line maps show a compact strong emission area (peaking at similar to810 pc similar to1.7 arcsec, to the east of the second nucleus) and faint extended emission with an elongated shape, and major and minor axes of similar to5.1 kpc (10.8 arcsec; at PA similar to20degrees) and similar to2.9 kpc (6.0 arcsec); (ii) inside this complex, the spectra show H II region and transition LINER/H II characteristics; (iii) at the border of this extended H II area the spectra have outflow components and LINER properties. INTEGRAL 2D [N II], Halpha, [S II] and [O III] velocity fields (VFs) are presented. These VF maps show results consistent with an expansion of the bubble, plus four ejections of ionized gas. The U, B, V, I, J, H and K-S images show a pre-merger morphology, from which faint filaments of emission emerge, centred on the bubble. The ionization structure and the physical conditions were analysed using the following 2D emission-line ratio and width maps: [S II]/Halpha, [N II]/Halpha, [O I]/Halpha, [O III]/Hbeta and FWHM-[N II]. In the region of the bubble, 100 per cent of the [N II]/Halpha and [S II]/Halpha ratios show very high values (>0.8) consistent with LINER processes associated with high-velocity shocks. These new results support the previous proposition that extreme nuclear and `extranuclear' starbursts with galactic winds + shocks play an important role in the evolution of IR mergers/quasi-stellar objects MH - Argentina MH - Brazil MH - United Kingdom MH - Japan MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0035-8711 UR - ISI:000226116200005 L2 - ISM : bubbles;galaxies : individual : NGC 5514;galaxies : interactions;galaxies : kinematics and dynamics;quasars : general;galaxies : starburst;ULTRALUMINOUS IRAS GALAXIES; MASSIVE STAR-FORMATION; EXTENDED IONIZED-GAS; POINT-SOURCE CATALOG; WOLF-RAYET FEATURES; LARGE-SCALE WINDS; FE-II; ETA-CARINAE; X-RAY; INTERACTING GALAXIES SO - Monthly Notices of the Royal Astronomical Society 2004 ;355(3):641-681 11423 UI - 4308 AU - Lipari SL AU - Diaz RJ AU - Forte JC AU - Terlevich R AU - Taniguchi Y AU - Aguero MP AU - onso-Herrero A AU - Mediavilla E AU - Zepf S AD - Cordoba Observ, RA-5000 Cordoba, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-5000 Cordoba, ArgentinaLa Plata Observ, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1900 La Plata, ArgentinaINAOE, Puebla, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandTohoku Univ, Inst Astron, Aoba Ku, Sendai, Miyagi 9808578, JapanIEM, Dept Astrofis Mol & IR, Madrid 28006, SpainInst Astrofis Canarias, Tenerife 38205, SpainMichigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USALipari, SL, Cordoba Observ, Laprida 854, RA-5000 Cordoba, Argentina TI - The nearest extreme starburst: bubbles, young star clusters and outflow in the merger NGC 3256 AB - We have studied the extreme starburst in the infrared merger NGC 3256. We detect four galactic bubbles (using ESO New Technology Telescope and Hubble Space Telescope WFPC2 Halpha images). These shells would be associated with previous supernova explosions. The first analysis of the spatial distribution of young star cluster candidates shows that more than 90 per cent of them are located in a complex starburst structure, including some of the bubble walls, three nuclei and three blue asymmetrical spiral arms. We have made a kinematic study of the ionized gas in the core of the main optical nucleus, performed with HST STIS spectra. The shape of the rotation curve and the emission-line profile can be explained by the presence in the core of young star clusters with outflow. Any low-luminosity active galactic nucleus associated with this core would have a mass less than 10(7) M-.. It is also probable that the compact X-ray and radio emission of ULX(7)N - the source coincident with the main optical nucleus - is the result of a few recent supernova remnants MH - Argentina MH - United Kingdom MH - Japan MH - Mexico|Puebla MH - Spain MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000224242100001 L2 - supernovae : general;ISM : bubbles;galaxies : individual : NGC 3256;galaxies : interactions;galaxies : kinematics and dynamics;galaxies : star clusters;LUMINOUS INFRARED GALAXIES; QUASI-STELLAR OBJECTS; GIANT HII-REGIONS; GLOBULAR-CLUSTERS; NGC 3256; GALACTIC WIND; EMISSION; CANDIDATE; EVOLUTION SO - Monthly Notices of the Royal Astronomical Society 2004 ;354(1):L1-L6 11424 UI - 5455 AU - Lippmann MJ AU - Truesdell AH AU - Rodriguez MH AU - Perez A AD - Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720, USAComis Fed Elect, Residencia Gen Cerro Prieto, Mexicali, Baja California, MexicoLippmann, MJ, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA TI - Response of Cerro Prieto II and III (Mexico) to exploitation AB - The Cerro Prieto field of northern Mexico is the largest water-dominated geothermal field under commercial production at the present time. In 2000 more than 115 million tons of fluids were extracted, but only about 20% was injected back into the reservoirs. This deficit has contributed to a drop in pressures resulting in localized boiling, influx of cooler groundwater and other reservoir processes. The influence of geologic features, especially faults, on these processes and on the response of different parts of the field to production is described. The study illustrates the importance of a multidisciplinary approach to gain an understanding of the behavior of geothermal systems under production. (C) 2003 CNR. Published by Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Energy & Fuels;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0375-6505 UR - ISI:000221592300001 L2 - water-dominated systems;boiling;condensation;recharge;injection;reservoir;Cerro Prieto;Mexico;BAJA-CALIFORNIA; GEOTHERMAL-FIELD; HEAT SO - Geothermics 2004 ;33(3):229-256 11425 UI - 4847 AU - Lips KR AU - Mendelson JR AU - Munoz-Alonso A AU - Canseco-Marquez L AU - Mulcahy DG AD - So Illinois Univ, Dept Zool, Carbondale, IL 62901, USAUtah State Univ, Dept Biol, Logan, UT 84322, USAEl Colegio Frontera Sur, ECOSUR, San Cristobal de las Casas, Chiapas, MexicoUniv Nacl Autonoma Mexico, Fac Ciencia, Dept Evolut Biol, Museo Zool, Mexico City 04510, DF, MexicoLips, KR, So Illinois Univ, Dept Zool, Carbondale, IL 62901, USA TI - Amphibian population declines in montane southern Mexico: resurveys of historical localities AB - Declines of amphibian populations have been well documented in the US, Canada, and Central America, but little is known regarding the status of amphibian populations in Mexico. In 2000, we surveyed 43 transects from 3 upland regions in Guerrero and Oaxaca, Mexico. We found 161 adult amphibians belonging to 39 species, representing only 19-48% of the anuran fauna known from these regions. We found one dead (Eleutherodactylus saltator) and one dying frog (Ptychohyla erythromma) from two different streams near Chilpancingo, Guerrero. Both frogs were infected with Batrachochytridium dendrobatidis, a pathogenic fungus involved in other declines of amphibian populations. We collected 368 tadpoles; 60 (19%) tadpoles from 9 different streams among the three regions were missing mouthparts, which is indicative of infection by chytrid fungus. We report additional data from the state of Chiapas, Mexico, that document declines, disease, and apparent extirpations from that region as well. Overall, we report 31 populations (representing 24 species) that appear to have been extirpated, including populations of as many as I I endemic species that have been missing for 16-40 years and may be extinct. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 32 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000223026500013 L2 - amphibians;declines;Mexico;montane;population;YELLOW-LEGGED FROG; CENTRAL-AMERICA; CHYTRIDIOMYCOSIS; MOUNTAIN; MORTALITY SO - Biological Conservation 2004 ;119(4):555-564 11426 UI - 3974 AU - Lisenfeld U AU - Braine J AU - Duc PA AU - Brinks E AU - Charmandaris V AU - Leon S AD - CSIC, Inst Astrofis Andalucia, Granada 18040, SpainUniv Granada, Dept Fis Teor & Cosmos, Granada, SpainObserv Bordeaux, UMR 5804, CNRS INSU, F-33270 Florac, FranceCNRS, URA 2052, F-91191 Gif Sur Yvette, FranceCEA DSM DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, FranceINAOE, Puebla 72000, MexicoCornell Univ, Dept Astron, Ithaca, NY 14853, USAObserv Paris, LERMA, F-75014 Paris, FranceLisenfeld, U, CSIC, Inst Astrofis Andalucia, Apdo 3004, Granada 18040, Spain TI - Molecular and ionized gas in the tidal tail in Stephan's Quintet AB - We have mapped with the IRAM interferometer at Plateau de Bure (PdBI) the (CO)-C-12 emission towards intergalactic star forming regions located in the tidal tail stemming from NGC 7319, in the Stephan's Quintet compact group of galaxies. The (CO)-C-13 emission of the same region was observed with the IRAM 30 m telescope and optical spectroscopy of several H.. regions in the area were obtained with the Calar Alto 3.5 m telescope. We recovered with the interferometer about 50% of the (CO)-C-12(1-0) total emission that had been earlier measured with single dish observations (Lisenfeld 2002, A&A, 394, 823), indicating that about half of the molecular gas is distributed on spatial scales larger than about 10-15" (corresponding to 4-6 kpc) to which PdBI is not sensitive. We find two main areas of CO emission: (i) an elongated region towards the area known as SQ B where a Tidal Dwarf Galaxy could currently be forming and (ii) a barely resolved area at the tip of the optical tidal arm. Both regions follow dust lanes visible on HST images and their CO peak coincides spatially exactly with the maximum of the Ha line emission. In SQ B, there is furthermore very good kinematical agreement between the CO, Ha and HI components. We conclude from these coincidences that the gaseous matter found in quantities in the area is physically associated to the optical tidal tail and thus that the intergalactic atomic hydrogen there was expelled from NGC 7319. Its origin had previously been much debated. Furthermore, the relatively high oxygen abundances ( about solar) estimated from the optical spectra of the H.. regions imply that the gas feeding the star formation originated from the inner regions of the parent galaxy. In SQ B, we derive from different tracers a star formation rate, corrected for dust extinction-which is important in the area-of 0.5 M-circle dot/yr, i. e. one of the highest values so far measured outside galaxies. The inferred molecular gas consumption time of 0.5 Gyr lies in the range of values found for spiral and starburst galaxies. On the other hand, the ratio of (CO)-C-12/(CO)-C-13 > 25 is much higher than the values found in disks of spiral galaxies. A relatively low opacity for the (CO)-C-12 gas is the most likely reason MH - France MH - Mexico|Puebla MH - Spain MH - USA PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000224965800017 L2 - stars : formation;ISM : molecules;galaxies : clusters : individual : Stephan's Quintet;galaxies : interactions;galaxies : ISM;galaxies : intergalactic medium;PHYSICAL CONDITIONS; INTRAGROUP MEDIUM; GALAXIES; EMISSION; STARBURST; (CO)-C-13; OBJECTS; MERGERS; REGIONS SO - Astronomy & Astrophysics 2004 ;426(2):471-479 11427 UI - 4488 AU - Litz RE AU - Moon PA AU - Benson EM AU - Stewart J AU - Chavez VM AD - Univ Florida, Ctr Trop Res & Educ, Homestead, FL 33031, USAUniv Abertay, Sch Mol & Life Sci, Dundee DD1 1HG, ScotlandUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoLitz, RE, Univ Florida, Ctr Trop Res & Educ, Homestead, FL 33031, USA TI - A biotechnology strategy for medium- and long-term conservation of cycads AB - It has been possible to regenerate a few cycad species in vitro by somatic embryogenesis, either from zygotic embryos (Ceratozamia hildae, C. mexicana, Encephalartos cycadifolius, E. dyerianus, E. natalensis, Zamia fischeri, Z furfuracea, and Z pumila) or from leaves of mature phase trees (C. euryphyllidia, Ceratozamia hildae, and C. mexicana). This strategy has great potential for the commercial vegetative propagation of certain highly endangered species (e.g., C. euryphyllidia) and should indirectly protect wild populations of these species by discouraging collection in situ. Embryogenic cultures of several cycad species have grown vigorously and are highly morphogenic more than 11 years after induction. The long-term conservation of cycad genetic resources can also be addressed for species that can be regenerated by somatic embryogenesis. Preliminary studies indicate that embryogenic cultures that have been pretreated on plant growth medium containing 0.75 M sucrose for two days, encapsulated in sodium alginate, and desiccated for six hours can survive immersion in liquid nitrogen (-196degreesC) MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0006-8101 UR - ISI:000223771500005 L2 - ROBUSTA MIQ DYER; SOMATIC EMBRYOGENESIS; CERATOZAMIA-HILDAE; REVOLUTA THUNB; ABSCISIC-ACID; LEAF CALLUS; EMBRYOS; ORGANOGENESIS; REGENERATION; CULTURES SO - Botanical Review 2004 ;70(1):39-46 11428 UI - 5647 AU - Liu JY AU - Chuo YJ AU - Shan SJ AU - Tsai YB AU - Chen YI AU - Pulinets SA AU - Yu SB AD - Natl Cent Univ, Inst Space Sci, Chungli, TaiwanNatl Cent Univ, Ctr Space & Remote Sensing Res, Chungli, TaiwanLing Tung Coll, Dept Informat Management, Taichung, TaiwanNatl Cent Univ, Inst Geophys, Chungli, TaiwanNatl Cent Univ, Inst Stat, Chungli, TaiwanNatl Autonomous Univ Mexico, Inst Geophys, Mexico City 04510, DF, MexicoAcad Sinica, Inst Earth Sci, Taipei, TaiwanLiu, JY, Natl Cent Univ, Inst Space Sci, Chungli, Taiwan TI - Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements AB - In this paper we examine pre-earthquake ionospheric anomalies by the total electron content (TEC) derived from a ground-based receiver of the Global Positioning System (GPS). A 15-day running median of the TEC and the associated inter-quartile range (IQR) are utilized as a reference for identifying abnormal signals during all of the 20 Mgreater than or equal to6.0 earthquakes in the Taiwan area from September 1999 to December 2002. Results show that the pre-earthquake ionospheric anomalies appear during 18:00-22:00 LT (LT=UT+8 h) within 5 days prior to 16 of the 20 Mgreater than or equal to6.0 earthquakes. This success rate of 80% (=16/20%) suggests that the GPS TEC is useful to register pre-earthquake ionospheric anomalies appearing before large earthquakes MH - Mexico|Distrito Federal MH - Taiwan PB - KATLENBURG-LINDAU: EUROPEAN GEOPHYSICAL SOC RP - NOT IN FILE U3 - TC 25 U4 - Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0992-7689 UR - ISI:000221114000014 L2 - ionosphere;ionospheric disturbances;ionosphere-atmosphere interactions;TOTAL ELECTRON-CONTENT; WAVES SO - Annales Geophysicae 2004 ;22(5):1585-1593 11429 UI - 6750 AU - Liu L AU - Samuel AM AU - Samuel FH AU - Doty HW AU - Valtierra S AD - Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, CanadaMet Casting Technol Inc, GM Powertrain Grp, Mat Engn, Milford, NH 03055, USACorp Nemak SA de CV, Res & Dev, Garza Garcia 66221, NL, MexicoLiu, L, Univ Quebec, Dept Appl Sci, Chicoutimi, PQ G7H 2B1, Canada TI - Characteristics of alpha-dendritic and eutectic structures in Sr-treated Al-Si casting alloys AB - The present study was carried out to determine the effect of alloy composition and solidification conditions on changes in the dendritic and eutectic structures in Al-Si alloys containing strontium. A series of experimental and industrial alloys viz., Al-7% Si, Al-12% Si, 319 and 356 were selected, to cover a variety of alloy freezing ranges. The techniques of thermal analysis, optical microscopy, and SEM/EDX and EPMA analyses were employed to obtain the results presented here. Depression in the eutectic Si temperature in Al-7% Si alloys occurs on addition of alloying elements such as Mg and Cu. Introduction of Sr to these alloys further depresses the eutectic temperature, with a corresponding increase in the volume fraction of the alpha-Al phase. The primary dendrite solidification pattern changes from parallel rows to a branched form, producing an equiaxed type of structure and hence shorter primary dendrite lengths. This is expected to enhance the interdendritic feedability. The lengths of the secondary dendrite arms are controlled by the rejection of solute atoms in front of the growing dendrites during solidification. The higher the alloying content in the alloy (i.e., 319), the smaller the dendrite cell size. The longer solidification time in the 319 alloy also appears to have a considerable influence on the amount of porosity formed in the alloy, in addition to that of Sr. (C) 2004 Kluwer Academic Publishers MH - Canada MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000187179000022 SO - Journal of Materials Science 2004 ;39(1):215-224 11430 UI - 4937 AU - Liu XJ AU - Lara-Rosano F AU - Chan CW AD - Natl Autonomous Univ Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoChinese Univ Hong Kong, Dept Engn Mech, Sha Tin 100083, Peoples R ChinaLiu, XJ, Natl Autonomous Univ Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico TI - Model-reference adaptive control based on neurofuzzy networks AB - Model reference adaptive control (MRAC) is a popular approach to control linear systems, as it is relatively simple to implement. However, the performance of the linear MRAC deteriorates rapidly when the system becomes nonlinear. In this paper, a nonlinear MRAC based on neurofuzzy networks is derived. Neurofuzzy networks are chosen not only because they can approximate nonlinear functions with arbitrary accuracy, but also they are compact in their supports, and the weights of the network can be readily updated on-line. The implementation of the neurofuzzy network-based MRAC is discussed, and the local stability of the system controlled by the proposed controller is established. The performance of the neurofuzzy network-based MRAC is illustrated by examples involving both linear and nonlinear systems MH - Mexico|Distrito Federal MH - Peoples R China PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence;Computer Science, Cybernetics;Computer Science, Interdisciplinary Applications U5 - J;Article AV - English IS - 1094-6977 UR - ISI:000222721200007 L2 - model-reference adaptive control;neurofuzzy networks;nonlinear controller;FUZZY CONTROLLER; NEURAL NETWORKS; SYSTEMS SO - Ieee Transactions on Systems Man and Cybernetics Part C-Applications and Reviews 2004 ;34(3):302-309 11431 UI - 5220 AU - Lizarraga DA AU - Aneke NPI AU - Nijmeijer H AD - Inst Potosino Invest Cient & Tecnol, Dept Matemat Aplicada & Sistemas Computac, San Luis Potosi, MexicoFord Forschungszentrum Aachen GmbH, Vehicle Elect & Controls Grp, Alternat Powertrains, D-52072 Aachen, GermanyEindhoven Univ Technol, Dept Mech Engn, NL-5600 MB Eindhoven, NetherlandsLizarraga, DA, Inst Potosino Invest Cient & Tecnol, Dept Matemat Aplicada & Sistemas Computac, Apartado Postal 3-74 Tangamanga, San Luis Potosi, Mexico TI - Robust point stabilization of underactuated mechanical systems via the extended chained form AB - This paper addresses point stabilization for the extended chained form (ECF), a control system that may be used to model a number of mechanical underactuated systems. A control law is proposed, based on well-known hybrid open-loop/feedback techniques, which exponentially stabilizes the origin of a dynamic extension of the ECF and ensures a degree of robustness to additive disturbance terms that may represent, for instance, model uncertainties. Numerical simulations are included to illustrate the performance of the presented stabilizers MH - Germany MH - Mexico|San Luis Potosi MH - Netherlands PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 0363-0129 UR - ISI:000221925100015 L2 - extended chained form;second-order chained form;point stabilization;hybrid feedback;underactuated manipulator;surface vessel;NONHOLONOMIC UNDERWATER VEHICLE; CONSTANT DESIRED CONFIGURATION; EXPONENTIAL STABILIZATION; FEEDBACK SO - Siam Journal on Control and Optimization 2004 ;42(6):2172-2199 11432 UI - 5549 AU - Lizarraga DA AD - IPICyT, Dept Matemat Aplicadas & Sistemas Computac, San Luis Potosi, MexicoINRIA Sophia Antipolis, Sophia Antipolis, FranceLizarraga, DA, IPICyT, Dept Matemat Aplicadas & Sistemas Computac, Apartado Postal 3-74 Tangamanga, San Luis Potosi, Mexico TI - Obstructions to the existence of universal stabilizers for smooth control systems AB - This paper states necessary conditions for the existence of "universal stabilizers'' for smooth control systems. Roughly speaking, given a control system and a set U of reference input functions, by "universal stabilizer'' we mean a continuous feedback law that stabilizes the state of the system asymptotically to any of the reference trajectories produced by (arbitrary) inputs in U. For an example, consider Brockett's nonholonomic integrator, with U representing a set of uniformly bounded, piecewise continuous functions of time. This system's state can be asymptotically stabilized to any reference trajectory provided the latter is persistently exciting (PE). By contrast, for constant trajectories (i.e., equilibria), which are not PE, asymptotic stabilization is impossible by means of continuous pure-state feedback, in view of Brockett's obstruction. However, since this obstruction can be circumvented by the use of time-varying state feedback, one might reasonably expect to be able to design a (time-varying) continuous control law capable of asymptotically stabilizing the state to arbitrary reference trajectories, be they PE or not. Surprisingly, a consequence of the results in this paper is that, for systems with nonholonomic constraints frequently found in control applications, if U contains reference functions that are not PE, then the "universal stabilization'' problem cannot be solved, even if time-varying feedback is used MH - France MH - Mexico|San Luis Potosi PB - GODALMING: SPRINGER-VERLAG LONDON LTD RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0932-4194 UR - ISI:000221380400001 L2 - chained form;nonholonomic;persistently exciting or persistence of excitation (PE);synchronization;tracking;universal stabilization;TRACKING CONTROL; MOBILE ROBOTS; CHAINED-FORM; FEEDBACK; TIME SO - Mathematics of Control Signals and Systems 2004 ;16(4):255-277 11433 UI - 5789 AU - Lizarraga I AU - Sumano H AU - Brumbaugh GW AD - Natl Autonomous Univ Mexico, Sch Vet Med, Dept Pharmacol, Mexico City 04510, DF, MexicoTexas A&M Univ, Coll Vet Med, College Stn, TX 77843, USASumano, H, Natl Autonomous Univ Mexico, Sch Vet Med, Dept Pharmacol, Mexico City 04510, DF, Mexico TI - Pharmacological and pharmacokinetic differences between donkeys and horses MH - Mexico|Distrito Federal MH - USA PB - NEWMARKET: EQUINE VETERINARY JOURNAL LTD RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0957-7734 UR - ISI:000220687800009 L2 - horse;donkey;pharmacokinetics;pharmacological;drugs;differences;CLINICALLY NORMAL HORSES; PENICILLIN-G; INTRAMUSCULAR BIOAVAILABILITY; METABOLITE OXYPHENBUTAZONE; DISPOSITION KINETICS; PLASMA DISPOSITION; AMPICILLIN-SODIUM; MINIATURE DONKEYS; HEALTHY HORSES; MAMMOTH ASSES SO - Equine Veterinary Education 2004 ;16(2):102-112 11434 UI - 5210 AU - Llop-Vinolas D AU - Vizmanos B AU - Monasterolo RC AU - Subias JE AU - Fernandez-Ballart JD AU - Marti-Henneberg C AD - Univ Rovira & Virgili, Fac Med & Hlth Sci, Tarragona 43201, SpainUniv Guadalajara, Dept Clin Reprod Humana, Guadalajara, Jalisco, MexicoLlop-Vinolas, D, Univ Rovira & Virgili, Fac Med & Hlth Sci, Calle San Lorenzo 21, Tarragona 43201, Spain TI - Onset of puberty at eight years of age in girls determines a specific tempo of puberty but does not affect adult height AB - Aims: To analyse the effect of early puberty (onset between 7.5 and 8.5 y) on pubertal growth and adult height in girls, and the implications of this effect for the age limit for normal onset of puberty. Methods: Longitudinal study in Reus (Spain) of 32 girls with early puberty until they reached adult height. Data from these girls were compared with longitudinal data from girls (116) from the same population with normal onset at 10 (n = 37), 11 (n = 47), 12 (n = 19) and 13 (n = 13) y. We analysed height, target height, adult height, pubertal height increase, duration of pubertal growth, age at menarche and time to menarche. Results: The adult height of girls with early puberty (160.9 +/- 5.4 cm) was similar to that of girls with onset at later ages (p = not significant). In these girls, puberty lasted 5.4 +/- 0.7 y and the mean growth during puberty was 31.1 +/- 3.5 cm. As the age of onset of puberty increases, the duration of puberty and mean growth during puberty progressively decreased (p < 0.001). Girls with early puberty reached menarche at a mean age of 10.9 &PLUSMN; 1.0 y, 3.2 &PLUSMN; 0.9 y after onset of puberty, and this time span was greater than in the other groups. Conclusion: Girls with onset of puberty at 8 y show all the compensatory phenomena related to height at onset, pubertal duration and height increase during puberty. These phenomena cause their adult height to be similar to that of girls who begin puberty at the age of 10 to 13 y MH - Mexico|Jalisco MH - Spain PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 7 U4 - Pediatrics U5 - J;Article AV - English IS - 0803-5253 UR - ISI:000222002000003 L2 - early puberty;pubertal growth;adult height;girls;menarche;CENTRAL PRECOCIOUS PUBERTY; FINAL HEIGHT; SEXUAL PRECOCITY; HORMONE; GROWTH; THERAPY; ANALOG; DURATION; STATURE; MASS SO - Acta Paediatrica 2004 ;93(7):874-879 11435 UI - 5737 AU - Lobell DB AU - Ortiz-Monasterio JI AU - Asner GP AD - Carnegie Inst Washington, Dept Global Ecol, Stanford, CA 94305, USAStanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305, USAInt Maize & Wheat Improvement Ctr CIMMYT, Wheat Program, Mexico City 06600, DF, MexicoLobell, DB, Carnegie Inst Washington, Dept Global Ecol, 290 Panama St, Stanford, CA 94305 USA TI - Relative importance of soil and climate variability for nitrogen management in irrigated wheat AB - Increased efficiency of nitrogen (N) fertilizer use may be achieved with management practices that account for spatial variability in soil properties and temporal variability in climate. In this study, we develop a N management decision model for an irrigated wheat system that incorporates hypothetical diagnostics of soil N and growing season climate. The model is then used to quantify the potential value of these forecasts with respect to wheat yields, farmer profits, and excess N application. Under the current scenario (i.e. no diagnostics), uncertainty in soil and climate conditions is shown to account for an average overapplication of N by roughly 35%. Both soil diagnostics and climate forecasts are shown to increase profits significantly and decrease over-application of N, with minimal changes in yield. Soil variability is roughly three times as important as climate variations in terms of potential impact on profits in this region. The model was also used to simulate the effect of increases in fertilizer price, which have similar positive effects on excess N application but negative impacts on profits. Finally, the role of forecast uncertainty was evaluated, indicating that even limited information on soil or climate can be a useful input to management decisions. Future work is needed to improve operational diagnostics of soil N and growing season climate, whose cost can then be compared to benefits calculated in this study to determine their net value to N management decisions. (C) 2003 Elsevier B.V All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000220837900004 L2 - climate variability;management decisions;nitrogen;soil variability;uncertainty;wheat;NUTRIENT MANAGEMENT; POTENTIAL BENEFITS; PRODUCTION SYSTEMS; AGRICULTURE; INTENSIFICATION; ASIA SO - Field Crops Research 2004 ;87(2-3):155-165 11436 UI - 2789 AU - Loiseau JJ AU - Zagalak P AU - Mondie S AD - Univ Nantes, UMR CNRS 6597, Ecole Cent Nantes,Ecole Mines Nantes, Inst Rech Commun & Cybernet Nantes, F-44321 Nantes, FranceAcad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague, Czech RepublicIPN, CINVESTAV, Dept Automat Control, Mexico City 07300, DF, MexicoUTC, UMR CNRS 6599, Compiegne, FranceLoiseau, JJ, Univ Nantes, UMR CNRS 6597, Ecole Cent Nantes,Ecole Mines Nantes, Inst Rech Commun & Cybernet Nantes, BP 92101, F-44321 Nantes, France TI - Some remarks on matrix pencil completion problems AB - The matrix pencil completion problem introduced in Loiseau. et al. [12] is reconsidered and the latest results achieved in that field are discussed MH - Czech Republic MH - France MH - Mexico|Distrito Federal PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000227723700002 L2 - matrix pencils;the Kronecker invariants;matrix completion;linear systems;state feedback;INVARIANT FACTORS; FEEDBACK SO - Kybernetika 2004 ;40(6):665-680 11437 UI - 5888 AU - Long DA AU - Price KL AU - Herrera-Acosta J AU - Johnson RJ AD - Univ Florida, Div Nephrol Hypertens & Transplantat, Sect Nephrol Hypertens & Transplantat, Gainesville, FL 32610, USAInst Nacl Cardiol I Chavez, Dept Nephrol, Mexico City, DF, MexicoJohnson, RJ, Univ Florida, Div Nephrol Hypertens & Transplantat, Sect Nephrol Hypertens & Transplantat, POB 100224, Gainesville, FL 32610 USA TI - How does angiotensin II cause renal injury? MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Peripheral Vascular Disease U5 - J;Editorial Material AV - English IS - 0194-911X UR - ISI:000220450300007 L2 - PRESSURE-INDEPENDENT PROTECTION; BLOOD-PRESSURE; HYPERTENSION; BLOCKADE; SYSTEM; INHIBITION; DISEASES; RATS SO - Hypertension 2004 ;43(4):722-723 11438 UI - 5063 AU - Long KZ AU - Hass M AU - Young C AU - Estrada T AU - Firestone N AU - Fawzi WW AU - Bhagwat J AU - Rosado JL AU - Santos JI AU - Nanthakumar N AD - Harvard Univ, Sch Publ Hlth, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA, USACINVESTAV, Mexico City 14000, DF, MexicoUNAQ, Queretaro, QR, MexicoCENSIA, Mexico City, DF, Mexico TI - Impact of vitamin A on the intestinal immune response in pathogen induced diarrhea of children in Mexico City, Mexico MH - Mexico|Distrito Federal MH - Mexico|Quintana Roo MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470600042 SO - Faseb Journal 2004 ;18(4):A9-A9 11439 UI - 5068 AU - Long KZ AU - Rosado JL AU - Montoya Y AU - Fawzi WW AU - Hertzmark E AU - Santos JI AD - Harvard Univ, Sch Publ Hlth, Boston, MA 02115, USAUniv Autonoma Queretaro, Queretaro 76176, MexicoCENSIA, Direcc Gen, Mexico City, DF, Mexico TI - Vitamin A and zinc have distinct effects on gastrointestinal parasite infections among children in Mexico City, Mexico MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602319 SO - Faseb Journal 2004 ;18(4):A481-A481 11440 UI - 3425 AU - Longo MJ AU - Burnstein RA AU - Chakravorty A AU - Chen YC AU - Choong WS AU - Clark K AU - Dukes EC AU - Durandet C AU - Felix J AU - Fu Y AU - Gidal G AU - Gustafson HR AU - Holmstrom T AU - Huang M AU - James C AU - Jenkins CM AU - Jones T AU - Kaplan DM AU - Lederman LM AU - Leros N AU - Lopez F AU - Lu LC AU - Luebke W AU - Luk KB AU - Nelson KS AU - Park HK AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Volk J AU - White CG AU - White S AU - Zyla P AD - Univ Michigan, Ann Arbor, MI 48109, USAAcad Sinica, Inst Phys, Taipei 11529, TaiwanUniv Calif Berkeley, Berkeley, CA 94720, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Leon 37000, MexicoIIT, Chicago, IL 60616, USAUniv Lausanne, CH-1015 Lausanne, SwitzerlandLawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv S Alabama, Mobile, AL 36688, USAUniv Virginia, Charlottesville, VA 22904, USALongo, MJ, Univ Michigan, Ann Arbor, MI 48109, USA TI - High statistics search for the theta(+)(1.54) pentaquark state AB - We have searched for theta(+)(1.54)-->K(0)p decays using data from the 1999 run of the HyperCP experiment at Fermilab. We see no evidence for a narrow peak in the K(S)(0)p mass distribution near 1.54 GeV/c among 106 000 K(S)(0)p candidates, and obtain an upper limit for the fraction of theta(+)(1.54) to K(S)(0)p candidates of <0.3% at 90% confidence MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 38 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000226054700001 L2 - POSITIVE-STRANGENESS; RESONANCE; PHOTOPRODUCTION; MASS; HERA SO - Physical Review D 2004 ;70(11): 11441 UI - 5332 AU - Loos-Neskovic C AU - Ayrault S AU - Badillo V AU - Jimenez B AU - Garnier E AU - Fedoroff M AU - Jones DJ AU - Merinov B AD - CNRS, Ctr Etud Chim Met, F-94407 Vitry Sur Seine, FranceCEA Saclay, CNRS, CEA, Lab Pierre Sue, F-91191 Gif Sur Yvette, FranceUniv Autonome Zacatecas, Ctr Reg Estudios Nucl, Zacatecas 98068, Zac, MexicoCSIC, Inst Quim Organ Gen, E-28006 Madrid, SpainUniv Poitiers, UMR CNRS 6530, Lab Electrocatalyse, F-86022 Poitiers, FranceUniv Montpellier 2, UMR CNRS 5072, Lab Agregais Mol & Mat Inorgan, F-34095 Montpellier, FranceFedoroff, M, CNRS, Ctr Etud Chim Met, 15 Rue G Urbain, F-94407 Vitry Sur Seine, France TI - Structure of copper-potassium hexacyanoferrate (II) and sorption mechanisms of cesium AB - A mixed potassium-copper hexacyanoferrate (II) K2CuFe(CN)(6) was prepared by local growth on solid cupric sulfate in an aqueous solution of potassium hexacyanoferrate (II) and by growth in a gel. Powders having this composition and separable by filtration could not be obtained by normal precipitation from aqueous solution. This compound has a triclinic P-1 structure, described for the first time, and made up of non-linear -Fe-C-N-Cu-chains which form a puckered layered network. Sorption mechanisms for cesium have been studied in batch experiments including kinetics and isotherms, X-ray diffraction, infra-red spectroscopy and scanning electron microscopy. In neutral solutions the initial crystal structure is maintained and sorption proceeds through a K/Cs ion exchange. In acid solutions, even without addition of cesium, the initial structure is destroyed. The main phase formed in acidic media is Cu2Fe(CN)(6). In the presence of cesium the structure is also destroyed and new solid phases are formed. All these processes have slow kinetics, the evolution of the solid being observed over a period of 6 months. This study confirms previous results, which have shown that the sorption mechanisms on hexacyanoferrates strongly depend on the composition and structure of the solid, together with the composition of the solution. Sorption mechanisms have considerable consequences on the use of these products for the decontamination of radioactive wastes. (C) 2004 Elsevier Inc. All rights reserved MH - France MH - Mexico|Zacatecas MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000221769300006 L2 - cesium;potassium copper hexacyanoferrate;crystal structure;sorption;radioactive wastes;ZINC FERROCYANIDES; X-RAY; NICKEL; COLUMN; GROWTH SO - Journal of Solid State Chemistry 2004 ;177(6):1817-1828 11442 UI - 3582 AU - Lopez-Alarcon M AU - Merrifield J AU - Fields DA AU - Hilario-Hailey T AU - Franklin FA AU - Shewchuk RM AU - Oster RA AU - Gower BA AD - Univ Alabama, Dept Nutr Sci, Div Physiol & Metab, Birmingham, AL 35294, USAUniv Alabama, Dept Pediat, Birmingham, AL 35294, USAUniv Alabama, Dept Hlth Serv Adm, Birmingham, AL 35294, USAUniv Alabama, Gen Clin Res Ctr, Birmingham, AL 35294, USAMexican Inst Social Secur, Pediat Hosp, Natl Med Ctr Siglo XXI, Nutr Res Med Unit, Mexico City, DF, MexicoUniv Oklahoma, Dept Hlth & Sport Sci, Norman, OK 73019, USAGower, BA, Univ Alabama, Dept Nutr Sci, Div Physiol & Metab, 429 Webb Bldg,1675 Univ Blvd, Birmingham, AL 35294 USA TI - Ability of the Actiwatch accelerometer to predict free-living energy expenditure in young children AB - Objective: To determine whether activity counts obtained with the Actiwatch monitor are associated with total expenditure and body composition in young children. Research Methods and Procedures: Actiwatch activity monitors were tested in 29 children 4 to 6 years old under field conditions over eight days. Total energy expenditure (TEE) was assessed with the doubly labeled water (DLW) technique. Correlation analyses were used to identify variables related to energy expenditure and percentage body fat. Multiple linear regression analyses were used to examine the variance in TEE and percentage body fat explained by activity counts after adjusting for relevant covariates. Results: Both average total daily activity counts (658,816 +/- 201,657) and the pattern of activity were highly variable among subjects. TEE was significantly related to lean body mass (r = 0.45) and age (r = 0.48; p < 0.05 for both). Activity counts alone were not associated with TEE. In multiple linear regression analyses, TEE was independently associated with only lean body mass. Percentage fat mass was independently associated with body weight, being a girl, and being white, but not with average total activity counts. Discussion: Activity counts obtained with the Actiwatch under free-living conditions do not reflect TEE in 4- to 6-year-old children and are not correlated with percentage fat mass. Therefore, average total activity counts obtained with the Actiwatch may be of limited value in identifying children at risk for becoming obese MH - USA MH - Mexico|Distrito Federal PB - SILVER SPRING: NORTH AMER ASSOC STUDY OBESITY RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 1071-7323 UR - ISI:000225929400020 L2 - physical activity;percentage fat mass;body composition;stable isotopes;African American;DOUBLY LABELED WATER; BODY-MASS SO - Obesity Research 2004 ;12(11):1859-1865 11443 UI - 4425 AU - Lopez-Alarcon M AU - Garcia-Zuniga P AU - Del Prado M AU - Garza C AD - Mexican Inst Social Secur, Unity Res Med Nutr, Mexico City 06720, DF, Mexico. Cornell Univ, Div Nutr Sci, Ithaca, NY 14853, USA TI - Breastfeeding protects against the anorectic response to infection in infants - Possible role of dha MH - Mexico|Distrito Federal MH - USA T3 - PROTECTING INFANTS THROUGH HUMAN MILKAdvances in experimental medicine and biology PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U4 - Medicine, Research & Experimental U5 - S;Article NT - SEnglishArticlemarsau@prodigy.net.mx1233 SPRING ST, NEW YORK, NY 10013 USAADVAN EXPERIMENT MED BIOLBAU75 AV - English IS - 0065-2598 UR - ISI:000223641000040 SO - 2004 ;():371-374 11444 UI - 4127 AU - Lopez-Castro MC AU - Carmona R AU - Nichols WJ AD - Univ Autonoma Baja California Sur, Dept Biol Marina, La Paz, BCS, MexicoWildcoast Int Conservat Team, Davenport, CA, USACalif Acad Sci, Dept Herpetol, San Francisco, CA 94118, USACarmona, R, Univ Autonoma Baja California Sur, Dept Biol Marina, La Paz, BCS, Mexico TI - Nesting characteristics of the olive ridley turtle (Lepidochelys olivacea) in Cabo Pulmo, southern Baja California AB - Baja California represents the northernmost reproductive area for Lepidochelys olivacea. This region is characterized by its high temperature and low humidity. Thus, nest site selection plays an important role in reproductive success. To evaluate the factors affecting site selection for oviposition Las Barracas Beach, located in the south of the peninsula, was visited, from August to November 2000, in weekly periods. A density of 2.55 nests ha(-1) was estimated from a total of 55 nests counted. A hatching success of 73.7% was observed, with 23.7% mortality and 2.5% of eggs without apparent development (eggs counted=4,031). On the day of oviposition, the relative surface humidity (between 0.75% and 1.75%) and temperature (32degreesC) preferred by the females for nest construction was determined at the nest site, as well as the mean distance between the nests and the high tide line for that day (17.65 m). Hatching success was affected by humidity and distance. In addition, hatching success was higher between 10 and 30 m above the high tide line measured on the day of oviposition (surface humidity ca. 1%). A total of 874 hatchlings were measured, with an average of 42.1 mm straight carapace length. Larger sizes were found in October and smaller ones in November. Generally speaking. the sizes found here were larger than those obtained in other areas. This is probably due to two factors: (1) the nests in Las Barracas were kept in situ, whereas in other areas nests are sometimes incubated artificially and (2) the nesting population of southern Baja California is different from the eastern Pacific population MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000224527600019 L2 - SEA-TURTLES; BEHAVIOR SO - Marine Biology 2004 ;145(4):811-820 11445 UI - 6168 AU - Lopez-Cervantes M AU - Torres-Sanchez L AU - Tobias A AU - Lopez-Carrillo L AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoUniv Carlos III Madrid, Dept Stat & Econometr, Madrid, SpainLopez-Carrillo, L, Inst Nacl Salud Publ, Av Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Dichlorodiphenyldichloroethane burden and breast cancer risk: A meta-analysis of the epidemiologic evidence AB - The relationship of dichlorodiphenyltrichloroethane (DDT) exposure and breast cancer risk has received increasing attention since the beginning of the 1990s. Contradicting published results regarding the relationship between body burden levels of p,p'-dichlorodiphenyldichloroethane (p,p'-DDE)-the main DDT metabolite-and breast cancer, we argue that such differences stem from methodologic differences among those studies. We performed a meta-analysis of 22 articles using DerSimonian and Laird's method for random effects models. The Q-statistic was used to identify heterogeneity in the outcome variable across studies. The gradient of p,p'-DDE exposure in epidemiologic studies was homogenized to serum lipid bases (nanograms per gram). The potential for publication bias was examined by means of the Begg's test. We discuss methodologic features of the studies in an attempt to reconcile the findings. The summary odds ratio (OR) for selected studies was 0.97 (95% confidence interval, 0.87-1.09) and the gradient of exposure ranged from 84.37 to 12,948 ng/g. No overall heterogeneity in the OR was observed (chi(2) = 27.93; df = 23; p = 0.218). Neither the study design nor the lack of breast-feeding control or the type of biologic specimen used to measure p,p'-DDE levels were the causes of heterogeneity throughout the studies. Evidence for publication bias was not found (p = 0.253). Overall, these results should be regarded as a strong evidence to discard the putative relationship between p,p'-DDE and breast cancer risk. Nevertheless, the exposure to DDT during critical periods of human development-from conception to adolescence-and individual variations in metabolizing enzymes of DDT or its derivatives are still important areas to be researched in regard to breast cancer development in adulthood MH - Mexico|Morelos MH - Spain PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 26 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000189149800036 L2 - breast cancer;DDT;epidemiology;evidence;meta-analysis;PLASMA ORGANOCHLORINE LEVELS; POLYCHLORINATED-BIPHENYLS; ADIPOSE-TISSUE; SERUM ORGANOCHLORINES; LACTATION HISTORY; CLINICAL-TRIALS; NORTH-CAROLINA; MEXICAN WOMEN; BLOOD-LEVELS; FOLLOW-UP SO - Environmental Health Perspectives 2004 ;112(2):207-214 11446 UI - 4105 AU - Lopez-Cruz O AU - Barkhouse WA AU - Yee HKC AD - INAOE, Puebla 72840, MexicoUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H8, CanadaLopez-Cruz, O, INAOE, Puebla 72840, Mexico TI - The color-magnitude effect in early-type cluster galaxies AB - We present the analysis of the color-magnitude relation (CMR) for a sample of 57 X-ray-detected Abell clusters within the redshift interval 0.02less than or equal tozless than or equal to0.18. We use the B-R versus R color-magnitude plane to establish that the CMR is present in all our low-redshift clusters and can be parameterized by a single straight line. We find that the CMRs for this large cluster sample of different richness and cluster types are consistent with having universal properties. The k-corrected colors of the individual CMRs in the sample at a fixed absolute magnitude have a small intrinsic dispersion of similar to0.05 mag. The slope of the CMR is consistent with being the same for all clusters, with the variations entirely accountable by filter band shifting effects. We determine the mean of the dispersion of the 57 CMRs to be 0.074 mag, with a small rms scatter of 0.026 mag. However, a modest amount of the dispersion arises from photometric measurement errors and possible background cluster superpositions, and the derived mean dispersion is an upper limit. Models that explain the CMR in terms of metallicity and passive evolution can naturally reproduce the observed behavior of the CMR in this paper. The observed properties of the CMR are consistent with models in which the last episode of strong star formation in cluster early-type galaxies occurred significantly more than similar to3 Gyr ago and the core set of early-type galaxies in clusters were formed more than 7 Gyr ago. The universality of the CMR provides us with an important tool for cluster detection and redshift estimation. A very accurate photometric cluster redshift estimator can be devised based on the apparent color shift of the CMR due to redshift. This calibrator has the additional advantage of being very efficient since only two bands are needed. An empirically calibrated redshift estimator based on the B-R color of the CMR for clusters with z<0.20 produces an accuracy of &UDelta;z&SIM;0.010. Background clusters, typically at z&SIM;0.25 and previously unknown, are found in this survey in the color-magnitude diagrams as secondary CMRs to the red of the target cluster CMRs. We also find clear cases of apparent X-ray substructure that are due to these cluster superpositions. This suggests that X-ray observations of clusters are also subject to a significant amount of projection contaminations MH - Canada MH - Mexico|Guanajuato MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 29 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224700200015 L2 - galaxies : clusters : general;galaxies : elliptical and lenticular, cD;galaxies : photometry;Galaxy : formation;REDSHIFT SURVEY CATALOGS; ELLIPTIC GALAXIES; COMA CLUSTER; PHOTOMETRIC PROPERTIES; SURFACE PHOTOMETRY; DISTANT CLUSTERS; DWARF GALAXIES; S0 GALAXIES; EVOLUTION; VIRGO SO - Astrophysical Journal 2004 ;614(2):679-691 11447 UI - 5165 AU - Lopez-Delgado H AU - Mora-Herrera ME AU - Zavaleta-Mancera HA AU - Cadena-Hinojosa M AU - Scott IM AD - INIFAP, Programa Nacl Papa, Metepec 52142, Mex, MexicoInst Recursos Nat, Programa Bot, Texcoco 25630, Edo Mex, MexicoUniv Wales, Inst Biol Sci, Aberystwyth SY23 3DA, Ceredigtion, WalesLopez-Delgado, H, INIFAP, Programa Nacl Papa, Metepec 52142, Mex, Mexico TI - Salicylic acid enhances heat tolerance and potato virus X (PVX) elimination during thermotherapy of potato microplants AB - A modification of the standard thermotherapy used to eliminate virus from potato virus X (PVX)-infected Solanum tuberosum microplants of the Mexican National Potato Program is described here. Microplants were cultured with or without 10(-5) M salicylic acid (SA) for 4 wk, then subcultured without SA and exposed to 42 C for 30 days. Survival was more consistent in SA-treated microplants: among seven genotypes, 40% to 100% of SA-treated microplants and 0% to 96% of controls survived at the end of thermotherapy. SA also improved survival of the post-thermotherapy subculture. Among surviving microplants, SA increased the virus-free yield to 100% from 40% to 65% in the controls. In an additional 30 PVX(+) genotypes, 98% of surviving SA-treated microplants were virus-free after thermotherapy, compared to 75% of controls. SA-treated microplants had lower catalase activity and higher hydrogen peroxide (H2O2) levels MH - Mexico|Estado De Mexico MH - United Kingdom PB - ORONO: POTATO ASSOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 1099-209X UR - ISI:000222283000001 L2 - salicylate;virus-free plants;IN-VITRO; HYDROGEN-PEROXIDE; PLANT-VIRUSES; ABSCISIC-ACID; TOBACCO; STRESS; THERMOTOLERANCE; THERAPY; SEEDLINGS; DISEASES SO - American Journal of Potato Research 2004 ;81(3):171-176 11448 UI - 4439 AU - Lopez-Franco YL AU - Valdez MA AU - Hernandez J AU - de la Barca AMC AU - Rinaudo M AU - Goycoolea FM AD - CIAD AC, Lab Biopolymers, Hermosillo 83000, Sonora, MexicoUniv Sonora, Dept Fis, Dept Invest Polimeros & Mat, Hermosillo 83000, Sonora, MexicoUniv Grenoble 1, CNRS, Ctr Rech Macromol Vegetales, F-38041 Grenoble, FranceValdez, MA, CIAD AC, Lab Biopolymers, POB 1735, Hermosillo 83000, Sonora, Mexico TI - Macromolecular dimensions and mechanical properties of monolayer films of Sonorean mesquite gum AB - Mesquite gum sourced from Prosopis velutina trees and gum arabic (Acacia spp.) were characterized using light scattering and Langmuir isotherms. Both gum materials were fractionated by hydrophobic interaction chromatography, yielding four fractions for both gums: FI, FIIa, FIIb and FIII in mesquite gum and FI, FII, FIIIa and FIIIb in gum arabic. In mesquite gum, the obtained fractions had different protein content (7.18-38.60 wt.-%) and macromolecular dimensions (M-w approximate to 3.89 x 10(5)-8.06 x 10(5) g . mol(-1), R-G approximate to 48.83-71.11 nm, R-H approximate to 9.61-24.06 nm) and architecture given by the structure factor (R-G/R-H ratio approximate to2.96-5.27). The mechanical properties of Langmuir monolayers at the air-water interface were very different on each gum and their fractions. For mesquite gum, the most active species at the interface were those comprised in Fractions IIa and IIb and III, while Fraction I the pi/A isotherm lied below that of the whole gum. In gum arabic only Fraction III developed greater surface pressure at the same surface per milligram of material than whole gum. This is rationalized in terms of structural differences in both materials. Mesquite gum tertiary structure seems to fit best with an elongated polydisperse macrocoil in agreement with the "twisted hairy rope" proposal for arabinogalactan proteoglycans MH - France MH - Mexico|Sonora PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 8 U4 - Biochemistry & Molecular Biology;Materials Science, Biomaterials;Polymer Science U5 - J;Article AV - English IS - 1616-5187 UR - ISI:000223856400002 L2 - gum arabic;interfaces;light scattering;mesquite gum;monolayers;ARABIC ACACIA-SENEGAL; PROSOPIS-JULIFLORA; ARABINOGALACTAN-PROTEINS; NATURAL GUMS; POLYSACCHARIDE; EMULSIONS; MODEL; OIL; CLASSIFICATION; FRACTIONS SO - Macromolecular Bioscience 2004 ;4(9):865-874 11449 UI - 6621 AU - Lopez-Gonzalez C AD - Inst Politecn Nacl, CIIDIR COFAA, Unidad Durango, Durango 34220, MexicoTexas Tech Univ, Dept Biol Sci, Lubbock, TX 79409, USALopez-Gonzalez, C, Inst Politecn Nacl, CIIDIR COFAA, Unidad Durango, Sigma S-N,Fracc 20 Noviembre 2, Durango 34220, Mexico TI - Ecological zoogeography of the bats of Paraguay AB - Aim To relate the composition of bat assemblages in Paraguay to environmental factors (vegetation) and to test the hypothesis that the observed patterns of distribution of Paraguayan mammals is ultimately due to soils and geological features. Location Paraguay. Methods Museum specimens were used to create a data base of 3762 individuals of forty-eight species collected in twenty-six 50 x 50 km sites distributed throughout the country. Proportion of each of sixteen vegetation types per site was estimated from vegetation maps. Vegetation and bat data were related using canonical correspondence analysis (CCA) and Mantel tests. The same analyses were performed with the bat data grouped in terms of trophic strategies. Results A significant relationship was found between composition of vegetation and composition of bat assemblages. CCA ordination arranged plant associations and bat assemblages into three distinct groups: Dry Chaco, Floodable Lands and Eastern Paraguay, which correspond to the major characteristics of the Paraguayan vegetation, geology and soils. Frugivorous bats were restricted to Eastern Paraguay and Floodable Lands, whereas most insectivore and omnivore species occur across the entire country. However, the maximum abundance of insectivorous and omnivorous species within each genus indicates that there is at least a partial segregation of species to one of the three regions, and in those cases where the maximum abundance of congeneric species coincide, those species differ considerably in size. Main conclusions The Paraguayan bat fauna is a composite of species from various South American biomes, with no endemic species. However, species are not randomly distributed across the country despite the lack of geographical barriers and the high dispersal capabilities of bats. Instead, species presence at any given site is strongly associated with vegetation patterns that are ultimately the result of the geological history of the area. This correlation can be explained partially in terms of habitat suitability and resource availability. Additionally, results suggest that interspecific interactions are also an important component in determining the composition of a given bat assemblage MH - Mexico|Durango MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0305-0270 UR - ISI:000187549700004 L2 - Paraguay;Chiroptera;canonical correspondence analysis;zoogeography;bats;species assemblages;CANONICAL CORRESPONDENCE-ANALYSIS; NEW-WORLD; GRADIENTS; DIVERSITY; DENSITY; FOREST; MODEL SO - Journal of Biogeography 2004 ;31(1):33-45 11450 UI - 4319 AU - Lopez-Hernandez A AU - Torres CF AU - Garcia HS AU - Hill CG AD - Univ Wisconsin, Dept Biol & Chem Engn, Madison, WI 53706, USAInst Tecnol Veracruz, UNIDA, Veracruz 91897, MexicoHill, CG, Univ Wisconsin, Dept Biol & Chem Engn, 1415 Engn Dr, Madison, WI 53706 USA TI - Method for analysis of TAG formed by reaction of fish oil with hydrogenated soybean oil AB - An HPLC method was developed for analysis of the TAG formed during interesterification of a fish oil rich in DHA residues and of a fully hydrogenated soybean oil. TAG species were separated using a three-phase (acetone/acetonitrile/chloroform) solvent system. Peak identities were assigned on the basis of a multiple linear regression analysis by using factors such as carbon number, number of double bonds, and number of PUFA in the molecule as predictors for TAG retention time. Good agreement between experimental and predicted retention times was observed when the effect of the PUFA was separated in the regression model from that of the monounsaturated FA. in addition, the new method permits one to determine tristearin at concentrations up to 3 mg/mL without encountering the problem of partial retention of this TAG in the column that was observed when chloroform is not incorporated in the mobile phase MH - Mexico|Veracruz MH - USA PB - CHAMPAIGN: AMER OIL CHEMISTS SOC A O C S PRESS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0003-021X UR - ISI:000224109000004 L2 - fish oil;HPLC;interesterification;triacylglycerol analysis;PERFORMANCE LIQUID-CHROMATOGRAPHY; FATTY-ACIDS; TRIACYLGLYCEROLS; LIPASE; ACIDOLYSIS SO - Journal of the American Oil Chemists Society 2004 ;81(8):743-747 11451 UI - 4044 AU - Lopez-Juarez A AU - Rivera-Santillan RE AU - Ballester-Perez A AU - Blaquez-Izquierdo ML AU - Munoz-Sanchez JA AD - UNAM, Fac Quim, Dpto Ingn Met, Mexico City 04510, DF, MexicoUniv Complutense Madrid, Fac Ciencias Quim, Dept Ciencia Mat & Ingn Met, E-28040 Madrid, SpainLopez-Juarez, A, UNAM, Fac Quim, Dpto Ingn Met, Mexico City 04510, DF, Mexico TI - Comparative study of chalcopyrite bioleaching in the presence of the ion Ag(I) with acidophilic bacteria AB - The bioleaching of metallic sulphides is carried out by acidophilic bacteria such as Thiobacillus ferrooxidans and Leptospirillum terrooxidans, among other, through the (re)generation of ions Fe(III) and the sulphide oxidation. Previous studies have demonstrated the catalytic effect of the silver ion on the chalcopyrite bioleaching by Fe(III) in acid media. In this work the bioleaching of chalcopyrite concentrates was studied using strains of mesophilic and moderate thermophilic bacteria in presence of silver ions. In the case of mesophilic microorganisms the addition of small quantities of silver in the solution increases the copper extraction. In presence of moderate thermophilic microorganisms the increase in the leaching temperature accelerates the kinetics of chalcopyrite oxidation. The results obtained in both tests are presented MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: ASOC QUIMICOS RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0001-9704 UR - ISI:000224684800005 L2 - bioleaching;catalytic effect;mesophilic bacteria;thermophilic bacteria;silver ion SO - Afinidad 2004 ;61(511):220-224 11452 UI - 6086 AU - Lopez-Revilla R AU - Soto-Zarate C AU - Ridaura C AU - Chavez-Duenas L AU - Paul D AD - IPN, CINVESTAV, Dept Cell Biol, Mexico City 07738, DF, MexicoNatl Pediat Inst, Dept Pathol, Mexico City, DF, MexicoFraunhofer Inst Toxicol & Aerosol Res, Dept Cell Biol, Hannover, GermanyFraunhofer Inst Toxicol & Aerosol Res, Ctr Med Biotechnol, Hannover, GermanyLopez-Revilla, R, IPICYT, Dept Biol Mol, Ap Postal 3-74 Tangamanga, San Luis Potosi 78231, Mexico TI - Progressive paralysis associated with diffuse astrocyte anaplasia in Delta 202 mice homozygous for a transgene encoding the SV40 T antigen AB - A convenient transgenic astrocytoma model in Delta202 mice, homozygous for a construct encoding the early region of the SV40 virus genome, is described. In the offspring of crosses between Delta202 mice heterozygous for the transgene nearly 60% were transgenic; one third of these developed progressive paralysis starting in the hindlimbs at approximately 35 days of age and died at 90 +/- 30 days of age. In affected mice proliferating-non-neuronal cells immunostained with antibodies to the GFAP, an astrocyte marker, whose number increased with age were found in the white matter of the brain, cerebellum and spinal cord, and progressive degeneration and necrosis of spinal motoneurons was observed that may explain the paralysis. The early onset and reproducible time course of the neurological disease suggest that homozygous Delta202 mice, whose proliferating astrocytes appear to damage spinal motoneurons, are a useful model to study astrocyte differentiation, function and tumorigenesis MH - Germany MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - CARLTON: BLACKWELL PUBLISHING ASIA RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology;Neurosciences;Pathology U5 - J;Article AV - English IS - 0919-6544 UR - ISI:000189323900005 L2 - astrocytes;glioma;SV40 T antigen;transgenic mice;tumorigenesis;BOVINE GROWTH-HORMONE; MOUSE MODELS; GENES; EXPRESSION SO - Neuropathology 2004 ;24(1):30-37 11453 UI - 3853 AU - Lopez-Sanchez AR AU - Esteban C AU - Rodriguez M AD - Inst Astrofis Canarias, Tenerife 38200, SpainInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoLopez-Sanchez, AR, Inst Astrofis Canarias, Tenerife 38200, Spain TI - The tidally disturbed luminous compact blue galaxy Mkn 1087 and its surroundings AB - We present new broad-band optical and near-infrared CCD imaging together with deep optical intermediate-resolution spectroscopy of Mkn 1087 and its surrounding objects. We analyze the morphology and colors of the stellar populations of the brightest objects, some of them star-formation areas, as well as the kinematics, physical conditions and chemical composition of the ionized gas associated with them. Mkn 1087 does not host an Active Galactic Nucleus, but it could be a Luminous Compact Blue Galaxy. Although it was classified as a suspected Wolf-Rayet galaxy, we do not detect the spectral features of these sort of massive stars. Mkn 1087 shows morphological and kinematical features that can be explained assuming that it is in interaction with two nearby galaxies: the bright KPG 103a and a dwarf (M-B similar to -18) star-forming companion. We argue that this dwarf companion is not a tidal object but an external galaxy because of its low metallicity [12+log(O/H) = 8.24] with respect to the one derived for Mkn 1087 [12+log(O/H) = 8.57] and its kinematics. Some of the non-stellar objects surrounding Mkn 1087 are connected by bridges of matter with the main body, host star-formation events and show similar abundances despite their different angular distances. These facts, together their kinematics, suggest that they are tidal dwarf galaxies formed from material stripped from Mkn 1087. A bright star-forming region at the south of Mkn 1087 (knot #7) does not show indications of being a tidal galaxy or the product of a merging process as suggested in previous works. We argue that Mkn 1087 and its surroundings should be considered a group of galaxies MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000225335100008 L2 - galaxies : starburst;galaxies : interactions;galaxies : abundances;Galaxy : kinematics and dynamics;galaxies : clusters : individual : Mkn 1087;WOLF-RAYET GALAXIES; OXYGEN ABUNDANCE DETERMINATION; HEAVY-ELEMENT ABUNDANCES; EMISSION-LINE GALAXIES; STAR-FORMING GALAXIES; H-I OBSERVATIONS; DWARF GALAXIES; HII-REGIONS; PHOTOMETRIC REDSHIFTS; INTERACTING GALAXIES SO - Astronomy & Astrophysics 2004 ;428(2):425-444 11454 UI - 5158 AU - Lopez-Sanchez AR AU - Esteban C AU - Rodriguez M AD - Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, SpainInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoLopez-Sanchez, AR, Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain TI - Massive star formation and tidal structures in HCG 31 AB - We present new broadband optical and near-infrared CCD imaging together with deep optical intermediate-resolution spectroscopy of the Hickson Compact Group 31. We analyze the morphology and colors of the stellar populations of the galaxies, as well as the kinematics, physical conditions, and chemical composition of the ionized gas in order to get a more complete view on the origin and evolution of the system. We estimate the ages of the most recent star formation bursts of the system, finding an excellent consistency among the values obtained with different indicators and starburst models. We find that member F hosts the youngest starburst of the group, showing a substantial population of Wolf-Rayet stars. The chemical abundances are fairly similar in all the members of the group despite their very different absolute magnitudes. We argue that the use of traditional metallicity-luminosity relations based on the absolute B-magnitude is not appropriate for dwarf starburst galaxies, because their luminosity is dominated by the transient contribution of the starburst to the blue luminosity. We think that members E and F of the group are candidate tidal dwarf galaxies because of their high metallicity, their kinematics, and the absence of underlying old stellar populations. Finally, we propose that HCG 31 is suffering several almost simultaneous interaction processes. The most relevant of these processes are ( 1) the merging of members A and C, which would have produced two optical tidal tails, and ( 2) a fly-by encounter between G and the A+C complex, which would have produced an H I tidal tail from the stripping of the external gas of A+C, from which members F and E have originated MH - Mexico|Puebla MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0067-0049 UR - ISI:000222254400010 L2 - galaxies : abundances;galaxies : clusters : individual (HCG 31);galaxies : interactions;galaxies : kinematics and dynamics;galaxies : starburst;DWARF IRREGULAR GALAXIES; WOLF-RAYET GALAXIES; H-II GALAXIES; METALLICITY-LUMINOSITY RELATIONSHIP; HICKSON COMPACT GROUP; OXYGEN ABUNDANCES; DISK GALAXIES; HII-REGIONS; INTERACTING GALAXIES; STARBURST GALAXIES SO - Astrophysical Journal Supplement Series 2004 ;153(1):243-267 11455 UI - 5023 AU - Lopez-Sandoval H AU - Richaud A AU - Contreras R AU - Leigh GJ AU - Hitchcock PB AU - Flores-Parra A AU - Galvez-Ruiiz JC AU - Cruz A AU - Noth H AU - Barba-Behrens N AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan & Nucl, Mexico City 04510, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Sussex, Dept Chem, Brighton BN1 9QJ, E Sussex, EnglandIPN, Dept Quim, Unidad Profes Interdisciplinaria Biotecnol, Mexico City, DF, MexicoUniv Munich, Dept Chem, D-18377 Munich, GermanyBarba-Behrens, N, Natl Autonomous Univ Mexico, Fac Quim, Dept Quim Inorgan & Nucl, Mexico City 04510, DF, Mexico TI - Triangulo-mu(3)-sulfido-trinickel(II) cone-shaped clusters and anion traps: structural characterization AB - Trinuclear Ni3S4N3 clusters were obtained from (1S,2S)-1-monothiasulfato-2-phenyl-2-(methylammoniumyl)propane (tpmp). Three homochiral ligand molecules together with three Ni-II ions give rise to a cone-shaped cluster topped by a mu(3)-sulfide ion. Each Ni-II is in a distorted planar geometry. X-ray structural studies showed that in three cases the three phenyl groups form the rim of a cage which contains R-OSO3 (R = C2H5, C3H7) or nitrate anions. The alkyl sulfates were generated during the synthesis reaction, and are hydrogen-bonded through the oxygen atoms to the antine nitrogen atoms. The corresponding compound with the methyl sulfate anion (MeOSO3) reacts with Fe-III nitrate to form a similar compound in which the nitrate anion occupies the cavity and its crystals were analyzed by X-ray diffraction. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear;Crystallography U5 - J;Article AV - English IS - 0277-5387 UR - ISI:000222399500020 L2 - pseudoephedrine;nickel;triangulo;cluster;anion exchange;MIXED BENZENETHIOLATO-SULFIDO; THIOLATE CLUSTER; CRYSTAL-STRUCTURE; BORON; SITE; MECHANISM; COMPLEXES; NITROGEN SO - Polyhedron 2004 ;23(10):1837-1843 11456 UI - 5114 AU - Lopez-Sandoval R AU - Pastor GM AD - Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78216, MexicoUniv Toulouse 3, Phys Quant Lab, CNRS, F-31062 Toulouse, FranceLopez-Sandoval, R, Inst Potosino Invest Cient & Tecnol, Camino Presa San Jose 2055, San Luis Potosi 78216, Mexico TI - Electronic properties of strongly correlated fermions in nanostructures AB - Lattice density-functional theory is applied to small clusters described by the Hubbard model in order to study the effect of the correlation on these nano-objects. Results for the ground-state energy and charge excitation gap of small clusters are presented and discussed as a function of the number of sites N-a, Coulomb repulsion U/t, and band filling n MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000222194000024 L2 - MATRIX RENORMALIZATION-GROUP; DENSITY-FUNCTIONAL THEORY; HUBBARD-MODEL; REPRESENTABILITY PROBLEM; TRANSITION METALS; SMALL CLUSTERS; MAGNETISM; TEMPERATURE; SYSTEMS; FERROMAGNETISM SO - Journal of Physics-Condensed Matter 2004 ;16(22):S2223-S2230 11457 UI - 5126 AU - Lopez-Sandoval R AU - Pastor GM AD - Inst Potosino Invest Cientif & Tecnol, San Luis Potosi 78210, MexicoUniv Toulouse 3, CNRS, Lab Phys Quant, F-31062 Toulouse, FranceLopez-Sandoval, R, Inst Potosino Invest Cientif & Tecnol, Av Venustiano Carranza 2425-A,Col Bellas Lomas, San Luis Potosi 78210, Mexico TI - Lattice density-functional theory applied to the three-dimensional Hubbard model AB - A density functional theory of lattice fermion models has been developed using the single-particle density matrix gamma(ij) as basic variable. The interaction-energy functional W(gamma) of the repulsive Hubbard model derives from exact dimer results, scaling properties of W(gamma) and known limits. Lattice density-functional theory is applied to the three-dimensional Hubbard model. Results for the ground-state energy and charge-excitation gap of the simple-cubic lattice are presented and discussed as a function of U/t and band filling. (C) 2003 Published by Elsevier B.V MH - France MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700083 L2 - density-functional theory;correlated electron systems;hubbard Hamiltonian SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():935-936 11458 UI - 5970 AU - Lopez-Sandoval R AU - Pastor GM AD - Inst Potosino Invest Cient & Tecnol, San Luis Potosi 78216, MexicoUniv Toulouse 3, CNRS, Phys Quant Lab, F-31062 Toulouse, FranceLopez-Sandoval, R, Inst Potosino Invest Cient & Tecnol, Camino Presa San Jose 2055, San Luis Potosi 78216, Mexico TI - Interaction-energy functional for lattice density functional theory: Applications to one-, two-, and three-dimensional Hubbard models AB - The Hubbard model is investigated in the framework of lattice density functional theory (LDFT). The single-particle density matrix gamma(ij) with respect to the lattice sites is considered as the basic variable of the many-body problem. A new approximation to the interaction-energy functional W[gamma] is proposed which is based on its scaling properties and which recovers exactly the limit of strong electron correlations at half-band filling. In this way, a more accurate description of W is obtained throughout the domain of representability of gamma(ij), including the crossover from weak to strong correlations. As examples of applications results are given for the ground-state energy, charge-excitation gap, and charge susceptibility of the Hubbard model in one-, two-, and three-dimensional lattices. The performance of the method is demonstrated by comparison with available exact solutions, with numerical calculations, and with LDFT using a simpler dimer ansatz for W. Goals and limitations of the different approximations are discussed MH - France MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000220185100018 L2 - REPRESENTABILITY PROBLEM; ELECTRON CORRELATIONS; CORRELATED ELECTRONS; TRANSITION METALS; FERROMAGNETISM; TEMPERATURE; MATRIX; NARROW; SUSCEPTIBILITY; EXCHANGE SO - Physical Review B 2004 ;69(8): 11459 UI - 3647 AU - Lopez-Soria S AU - Segales J AU - Nofrarias M AU - Calsamiglia M AU - Ramirez H AU - Minguez A AU - Serrano JM AU - Marin O AU - Callen A AD - Univ Autonoma Barcelona, Ctr Recerca & Sanitat Anim, Barcelona, SpainUniv Nacl Autonoma Mexico, Mexico City, DF, MexicoSwine Vet, Valencia, SpainMerial Labs, Barcelona, SpainLopez-Soria, S, Univ Autonoma Barcelona, Ctr Recerca & Sanitat Anim, Barcelona, Spain TI - Genetic influence on the expression of PCV disease MH - Mexico|Distrito Federal MH - Spain PB - LONDON: BRITISH VETERINARY ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Letter AV - English IS - 0042-4900 UR - ISI:000225655200022 L2 - MULTISYSTEMIC WASTING SYNDROME SO - Veterinary Record 2004 ;155(16):504-504 11460 UI - 4228 AU - Lopez-Velazquez D AU - Bello A AU - Perez E AD - CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, SpainUniv Autonoma Puebla, Fac Ciencias Quim, Puebla 72570, MexicoLopez-Velazquez, D, CSIC, Inst Ciencia & Tecnol Polimeros, Juan Cierva 3, E-28006 Madrid, Spain TI - Preparation and characterisation of hydrophobically modified hydroxypropylcellulose: Side-chain crystallisation AB - Hydroxypropylcellulose has been hydrophobically modified by reaction with different amounts of palmitoyl chloride. When the degree of substitution is sufficiently high, the side chains are able to produce lateral crystallisation, which has been analysed by DSC and diffraction experiments, using both conventional and synchrotron radiation. The melting temperatures and enthalpies depend on the degree of substitution, in such a way that is relatively easy to get melting temperatures close to that of the human body, although a rather wide melting region is obtained MH - Mexico|Puebla MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Polymer Science U5 - J;Article AV - English IS - 1022-1352 UR - ISI:000224239400009 L2 - hydroxypropylcellulose;solid-state structure;synchrotron X-ray analysis;thermal properties;WAXS;MODIFIED POLY(VINYL ALCOHOL); ISOTACTIC POLY(1-HEXADECENE); SYNCHROTRON; POLYMERS; BEHAVIOR; KINETICS SO - Macromolecular Chemistry and Physics 2004 ;205(14):1886-1892 11461 UI - 5650 AU - Lopez-Vera E AU - de la Cotera EPH AU - Maillo M AU - Riesgo-Escovar JR AU - Olivera BM AU - Aguilar MB AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Lab Marine Neurophamacol, Queretaro 76230, MexicoUniv Nacl Autonoma Mexico, Inst Neurobiol, Lab Signal Transduct, Queretaro 76230, MexicoUniv Utah, Dept Biol, Salt Lake City, UT 84112, USAAguilar, MB, Univ Nacl Autonoma Mexico, Inst Neurobiol, Lab Marine Neurophamacol, Queretaro 76230, Mexico TI - A novel structural class of toxins: the methionine-rich peptides from the venoms of turrid marine snails (Mollusca, Conoidea) AB - The objective of this investigation was to purify and characterize polypeptides from the venom ducts of the turrid snails Polystira albida and Gemmula periscelida (superfamily: Conoidea, family: Turridae), collected in Mexican waters. Venoms of other groups in the superfamily (family: Conidae, genus: Conus) have peptide toxins ('conotoxins'), but no venom components have been characterized from any turrid species. Crude venoms were fractionated using reversed-phase high performance liquid chromatography, and one major component from each venom was characterized. In contrast to most conotoxins, the polypeptides characterized contain a high proportion of Met, Tyr and Arg residues, and few, if any, Cys residues. The two peptides had some regions of homology. but were not significantly similar to other peptides. Both peptides are predicted to contain a-helical structures, and the peptide from P. albida is predicted to form a coiled-coil rnotif. This structural motif could provide conformational stability for these turrid venom components ('turritoxins'), which in the case of conotoxins is primarily achieved by disulfide bonds. Thus, the first turritoxins characterized are strikingly different from the conotoxins, suggesting divergent biochemical strategies in the venoms of different major groups included in the superfamily Conoidea. (C) 2004 Published by Elsevier Ltd MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000221021400002 L2 - methionine-rich;toxin;marine snails;turridae;Polystira albida;Gemmula periscelida;coiled-coil;methionine zipper;COILED-COILS; LEUCINE-ZIPPER; CONUS VENOMS; PROTEIN; PREDICTION; ALIGNMENT; RADULA SO - Toxicon 2004 ;43(4):365-374 11462 UI - 5078 AU - Lopez A AU - Benbelkacem H AU - Pic JS AU - Debellefontaine H AD - Inst Natl Sci Appl, GPI, LIPE, F-31077 Toulouse 4, FranceUniv Autonoma Puebla, FIQ, Puebla 72570, MexicoLopez, A, Inst Natl Sci Appl, GPI, LIPE, 135 Ave Rangueil, F-31077 Toulouse 4, France TI - Oxidation pathways for ozonation of azo dyes in a semi-batch reactor: A kinetic parameters approach AB - In this study ozone and the H2O2/O-3, oxidation system are used to decolorize aqueous solutions of Orange II (Or-II) and Acid Red 27 (AR-27). Investigations are carried out in a semi-batch bubble column reactor. A system of series-parallel reactions is proposed to describe the mechanism of dye oxidation. The stoichiometric ratio for the first reaction is found to be 1 mol dye per mol O-3, while the overall ozone demand for both reactions one and two is found to be 5 and 6 moles for Or-II and AR-27 respectively. Molecular and radical kinetics are compared: a radical scavenger, t-butanol, can be added to ensure only the molecular reaction of ozone, or hydrogen peroxide can be supplied through a peristaltic pump, to initiate radical reactivity. Results reveal that colour removal is ensured by direct ozone attack. For both dyes, TOC removal efficiencies of 50 - 60% are obtained by the action of the hydroxyl free radical. However, this is not improved by addition of H2O2, thus demonstrating that organic species alone ensure HOdegrees radical production during ozonation. Both the mass transfer and the ozone reactivity with the dyes are considered to evaluate the kinetic parameters for the molecular pathway MH - France MH - Mexico|Puebla PB - LONDON: SELPER LTD, PUBLICATIONS DIV RP - NOT IN FILE U3 - TC 9 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0959-3330 UR - ISI:000222397400006 L2 - Azo dye;hydrogen peroxide;kinetics;ozonation;reactivity;DISSOCIATING ORGANIC-COMPOUNDS; INORGANIC-COMPOUNDS; AQUEOUS-SOLUTIONS; RATE CONSTANTS; OZONE; WATER SO - Environmental Technology 2004 ;25(3):311-321 11463 UI - 6116 AU - Lopez D AU - Garcia-Valladares I AU - Palafox-Sanchez CA AU - de la Torre IG AU - Kobayashi K AU - Matsuura E AU - Lopez LR AD - Corgenix, Westminster, CO 80234, USAUniv Guadalajara, Western Gen Hosp, Minist Hlth, Guadalajara 44430, Jalisco, MexicoOkayama Univ, Grad Sch Med & Dent, Dept Cell Chem, Okayama 7008530, JapanLopez, LR, Corgenix, 12061 Tejon St, Westminster, CO 80234, USA TI - Oxidized low-density lipoprotein beta(2)-glycoprotein I complexes and autoantibodies to oxLig-1 beta(2)-glycoprotein I in patients with systemic lupus erythematosus and antiphospholipid syndrome AB - Oxidized low-density lipoprotein (oxLDL) interacts with beta(2)-glycoprotein I (beta(2)-GPI) via oxLDL-derived specific ligands (oxLig-1)forming complexes. The prevalence and significance of oxLDL/beta(2)-GPI complexes and antibodies to oxLig-Ybeta(2)-GPI were evaluated in patients with systemic lupus erythematosus (SLE) and antiphospholipid syndrome (APS). The oxLDL/beta(2)-GPI complex was 69% positive (above mean + 3 SD of control subjects) in 97 consecutive patients with SLE, % in 40 patients with SLE with secondary APS, and 60% in 50 control patients with SLE without APS. IgG anti-oxLig-1/beta(2)-GPI antibody was positive in 31 (32%) of 97 consecutive patients with SLE, in 26 (65%) of 40 patients with SLE with secondary APS, and in 6 (19%) of 32 control patients with SLE. Anti-oxLig1/beta(P)2-GPI antibodies were 93.7% specific with a positive predictive value of 90.0% for APS, better than anticardiolipin antibodies (80.0% specific, 71.4% predictive value). These results confirm that oxLDL/beta(2)GPI complexes are common in SLE and suggest a possible immunogenic role in APS. In contrast, IgG anti-oxLig-1/beta(2)-GPI antibodies not only are associated with but also are clinically useful risk factors for APS MH - Japan MH - Mexico|Jalisco MH - USA PB - CHICAGO: AMER SOC CLINICAL PATHOLOGY RP - NOT IN FILE U3 - TC 14 U4 - Pathology U5 - J;Article AV - English IS - 0002-9173 UR - ISI:000189270100016 L2 - antiphospholipid antibodies;autoimmunity;oxidized-LDL antibodies;ANTICARDIOLIPIN ANTIBODIES; ACCELERATED ATHEROSCLEROSIS; APOLIPOPROTEIN-H; DEPENDENT UPTAKE; THROMBOSIS; MACROPHAGES; DISEASE; LDL; BETA-2-GLYCOPROTEIN-I; THROMBOCYTOPENIA SO - American Journal of Clinical Pathology 2004 ;121(3):426-436 11464 UI - 3503 AU - Lopez EC AU - Rolee A AU - Le Meste M AD - Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoENS, BANA, Lab IMSA, Dijon, FranceLopez, EC, Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Carretera Pachuca Tulancingo Km 4-5, Pachuca 42076, Hidalgo, Mexico TI - Study of starch granules swelling by the blue dextran method and by microscopy AB - The evolution of corn and wheat starch granules swelling at different temperatures was determined by two techniques: the blue dextran method (which measures the swelling factor) and by optical (light) microscopy. The graphical results obtained using the blue dextran technique showed curves indicating the swelling of corn and wheat starch dispersions (at 64%, w/w, moisture content) characterized by an initial phase of slight swelling, a second phase of fast swelling and a final phase of maximum swelling. The concentrated solutions (42% and 47%, w/w, moisture content) showed a slight swelling with the increase in temperature. The effect of temperature on the shape of the granules was evaluated by the optical microscopy. The shape of the type A wheat starch granules was deformed at high temperatures. The corn and type B wheat granules had a spherical form. In the case of corn starch, a good correlation (r(2) = 0.929) was obtained between the results of optical microscopy and blue dextran techniques MH - France MH - Mexico|Hidalgo PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0038-9056 UR - ISI:000226006500003 L2 - swelling;wheat starch;corn starch;microscopy;WATER SO - Starch-Starke 2004 ;56(12):576-581 11465 UI - 5572 AU - Lopez EG AU - Poli R AU - Coello CAC AD - Univ Essex, Colchester CO4 3SQ, Essex, EnglandSecc Computac, Depto Ing Elect, Mexico City 07300, DF, MexicoLopez, EG, Univ Essex, Colchester CO4 3SQ, Essex, England TI - Reusing code in genetic programming AB - In this paper we propose an approach to Genetic Programming based on code reuse and we test it in the design of combinational logic circuits at the gate-level. The circuits evolved by our algorithm are compared with circuits produced by human designers, by Particle Swarm Optimization, by an n-cardinality CA and by Cartesian Genetic Programming MH - United Kingdom MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000189497300034 SO - Genetic Programming, Proceedings 2004 ;3003():359-368 11466 UI - 5914 AU - Lopez FLY AU - Luck M AD - Benemerita Univ Autonoma Puebla, Fac Ciencias Computac, Puebla, MexicoUniv Southampton, Dept Elect & Comp Sci, Southampton SO9 5NH, Hants, EnglandLopez, FLY, Benemerita Univ Autonoma Puebla, Fac Ciencias Computac, Puebla, Mexico TI - A model of normative multi-agent systems and dynamic relationships AB - For agents, one of the advantages of being part of a society is the satisfaction of those goals whose success depends on the abilities of other agents. In turn, societies are controlled by norms and, consequently, agents must be able first to model the society in which they exist, and then to identify the different relationships, due to norms, in which they might be involved in order to act appropriately. Both of these could mean the difference between the success or failure of their goals. To this end, this paper focuses on the identification of the basic components of norm-based systems, and on representing and analysing the dynamic relationships between member agents which result from the processing of norms MH - United Kingdom MH - Mexico|Puebla PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000189423300016 SO - Regulated Agent-Based Social Systems 2004 ;2934():259-280 11467 UI - 6591 AU - Lopez MJ AU - Luna-Perez P AD - St Elizabeths Med Ctr, Dept Surg, Div Surg Oncol, Boston, MA 02135, USATufts Univ, Sch Med, Boston, MA 02111, USAInst Mexicano Seguro Social, Ctr Med Nacl Siglo 21, Dept Surg Oncol, Colorectal Serv, Mexico City, DF, MexicoLopez, MJ, St Elizabeths Med Ctr, Dept Surg, Div Surg Oncol, 736 Cambridge St,CMPI, Boston, MA 02135 USA TI - Composite pelvic exenteration: Is it worthwhile? AB - Background: In locally advanced pelvic cancer, tumor fixation to the bony pelvis is regarded as unresectable and often inoperable. Few data exist regarding the futility or utility of pelvic exenteration with en bloc resection of involved portions of the bony pelvis. Methods: Thirty-four of 625 patients undergoing radical pelvic procedures had an en bloc resection of pelvic organs with portions of the bony pelvis. There were 19 female and 15 male patients, and the median age was 59 years. Primary neoplasms included 19 rectal, 6 cervicouterine, 4 anal, 3 vaginal, 1 sarcoma, and 1 penile. All but three patients underwent preoperative pelvic irradiation. Pelvic exenterations were posterior in 7 patients, anterior in 3, supralevator in 3, and total in 21 patients. Pelvic bony resections included portions of the sacrum-coccyx in 18 patients, ischium in 5, pubic symphysis in 4, and ischial pubic rami in 4, and hernipelvectomy was performed in 3. Results: Surgical morbidity occurred in 67.6% (23) of 24 patients. Median follow-up was 37 months. Pelvic or perineal tumor recurrence was concurrent with distant metastases in 9 patients (26.4%); 6 (17.6%) had only distant relapse, and 2 (5.8%) died with local recurrence alone. Overall cancer-related mortality rate was 50%. Five-year overall and cancer-specific survival rates were 44% and 52%, respectively. Conclusions: Substantial survival can be accomplished for patients whose tumors are fixed to limited portions of the bony pelvis. These procedures are still associated with substantial morbidity, but operative mortality is infrequent MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 10 U4 - Oncology;Surgery U5 - J;Article AV - English IS - 1068-9265 UR - ISI:000187802700008 L2 - anal canal cancer;gynecological cancer;radiotherapy;pelvic exenteration;rectal cancer;RECURRENT RECTAL-CANCER; INTRAOPERATIVE RADIOTHERAPY; COLORECTAL-CARCINOMA; RESECTION; SURVIVAL; SURGERY SO - Annals of Surgical Oncology 2004 ;11(1):27-33 11468 UI - 5333 AU - Lopez T AU - Rojas F AU - exander-Katz R AU - Galindo F AU - Balankin A AU - Buljan A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Politecn Nacl, ESIME, SEPI, Mexico City 07738, DF, MexicoConcepcion Univ, Fac Ciencias Quim, Concepcion, ChileRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, San Rafael Atlixco 186,AP 55-534, Mexico City 09340, DF, Mexico TI - Porosity, structural and fractal study of sol-gel TiO2-CeO2 mixed oxides AB - Sol-gel TiO2-CeO2 materials were synthesized at pH = 3 employing HNO3 as hydrolysis agent. Gels were thermally treated at 473, 673, 873. and 1073 K, respectively. Morphologies of the final substrates were studied via N-2 sorption, XRD and TEM. N-2 isotherms indicated a steady porosity in TiO2-CeO2 samples treated up to 873 K. Adsorption-desorption isotherms and TEM micrographs were used to perform fractal analyses of annealed samples. A dominant anatase phase was detected by XRD between 473 and 873 K while a rutile phase was evident at 1073 K. The presence of cerium conferred an increased thermal stability to the TiO2 materials against particle sintering and pore collapse. The structure of cerium-doped anatase lattice was visualized through crystal simulation to investigate the possible substitution of Ti4+ by Ce+4 ions. This effect and the progressive segregation of CeO2 crystals with temperature on the surface of TiO2 grains lead to substrates of assorted morphologies. (C) 2004 Elsevier Inc. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000221769300013 L2 - TiO2-CeO2 materials;cerium dispersion in titania;CeO2 surface segregation;CeO2-inhibited TiO2 sintering;xerogel fractal analysis;xerogel pore-size distribution;DENSITY-FUNCTIONAL THEORY; PORE-SIZE DISTRIBUTIONS; CAPILLARY CONDENSATION; CATALYTIC-ACTIVITY; TITANIA PHASES; ADSORPTION; PLATINUM; MODEL SO - Journal of Solid State Chemistry 2004 ;177(6):1873-1885 11469 UI - 6498 AU - Lopez T AU - Hernandez A AU - Bokhimi X AU - Torres-Martinez L AU - Garcia A AU - Pecchi G AD - Concepcion Univ, Fac Chem, Concepcion, ChileUniv Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Div Estudios Super, Monterrey, Nuevo Leon, MexicoUniv Nacl Autonoma Mexico, Inst Phys, Mexico City 01000, DF, MexicoInst Politecn Nacl, COOFA, UPIICSA, Mexico City, DF, MexicoPecchi, G, Concepcion Univ, Fac Chem, POB 160-C, Concepcion, Chile TI - Sol-gel titania modified with Ba and Li atoms for catalytic combustion AB - Samples of compounds in the ternary system BaO-Li2O-TiO2 were synthesized by using the sol-gel method at pH 3 and pH 9, and the calcination temperatures of 600 and 800degreesC in the region of solid solutions which can form the "ideal" composition Ba3Li2Ti8O20. The X-ray diffraction patterns of the samples showed a mixture of three crystalline phases, the main one was isostructural with the ternary phase Ba3Li2Ti8O20; the other two were BaTiO3 and Li2TiO3. By refining the structures with the Rietveld technique, a good fit to the experimental diffraction pattern was found, showing the partial substitution of Ti by Li in the Ba2Ti6O13 structure. The catalytic activity in methane combustion under the stoichiometric mixture of dilute CH4/O-2 was higher for the samples calcined at 600degreesC, where the Ba3Li2Ti8O20 ternary compound was formed. This high activity can be related with the large specific surface area, presence of anatase and low crystallite size. (C) 2004 Kluwer Academic Publishers MH - Chile MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000187938600021 L2 - RAMAN-SCATTERING; METHANE; GLASS; REFINEMENT SO - Journal of Materials Science 2004 ;39(2):565-570 11470 UI - 4853 AU - Loranca MBB AU - Santos LAO AD - BUAP, Fac Ciencias Computac, Cuerpo Acad Ingn Software Aplicac Estadist, Puebla, MexicoUNLPam, Dept Informat, GIDIS, RA-6360 La Pampa, ArgentinaLoranca, MBB, BUAP, Fac Ciencias Computac, Cuerpo Acad Ingn Software Aplicac Estadist, Calle 14 & Avenida San Claudio,Colonia San Manuel, Puebla, Mexico TI - Multiple correspondences and log-linear adjustment in e-commerce AB - When an exploratory data analysis is performed where more than two qualitative variables are present, the application of univariate, bivariate and multivariate statistical techniques allows to successfully describe the dataset. Particularly, the single correspondence technique gives important correlation and dimensionality reduction results, which helps when giving an objective interpretation of the data. In this paper the technique known as factor analysis of multiple correspondences is used, which is a generalization of the single correspondence technique used to corroborate results. The log-linear adjustment is used too, with the purpose of continuing with the Principal Components and Cluster Analyses [3]. The binary variables under study are the result of the e-commerce sites' evaluation process for the quality attributes of the "Functionality" feature [8, 9]. These data is concentrated in a binary table of 49 sites and 17 attributes [3, 8]. (See table A. 1 in the appendix for the list of variables) MH - Argentina MH - Mexico|Puebla PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000222840200024 SO - Advanced Distrubuted Systems 2004 ;3061():261-273 11471 UI - 4590 AU - Loredo ML AU - Mita-Alban LC AU - Monteon VM AU - Escobar JC AU - Yu ZX AD - Inst Nacl Cardiol, Mexico City, DF, MexicoNHLBI, NIH, Bethesda, MD 20892, USA TI - Nitric oxide mediates apoptosis in acute myocarditis induced by a Mexican strain of trypanosoma cruzi MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0022-2828 UR - ISI:000221181400034 SO - Journal of Molecular and Cellular Cardiology 2004 ;36(4):615-615 11472 UI - 3844 AU - Lorenzo C AU - Serrano-Rios M AU - Martinez-Larrad MT AU - Gonzalez-Sanchez JL AU - Seclen S AU - Villena A AU - Gonzalez-Villalpando C AU - Williams K AU - Stern MP AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, San Antonio, TX, USAHosp Univ San Carlos, Red Ctr RCMN C0308, Madrid, SpainUniv Peruana Cayetano Heredia, Diabet Clin, Lima, PeruAmer British Cowdray Hosp, Ctr Studies Diabet, Mexico City, DF, Mexico TI - Obesity and the metabolic syndrome in Hispanic and non-Hispanic white populations MH - Mexico|Distrito Federal MH - Peru MH - Spain MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000223951600275 SO - Diabetologia 2004 ;47():A105-A105 11473 UI - 4037 AU - Lorono-Pino MA AU - Farfan-Ale JA AU - Zapata-Peraza AL AU - Rosado-Paredes EP AU - Flores-Flores LF AU - Garcia-Rejon JE AU - Diaz FJ AU - Blitvich BJ AU - ndrade-Narvaez M AU - Jimenez-Rios E AU - Blair CD AU - Olson KE AU - Black W AU - Beaty BJ AD - Univ Autonoma Yucatan, Lab Arbovirol, Ctr Invest Reg Dr Hideyo Noguchi, Merida 97000, Yucatan, MexicoColorado State Univ, Dept Microbiol Immunol & Pathol, Arthropod Borne & Infect Dis Lab, Ft Collins, CO 80523, USAInst Mexicano Seguro Social, Hosp Gen Reg, Dept Prevent Med, Merida, Yucatan, MexicoSecretaria Salud Yucatan, Direcc Prevenc & Control Enfermedades, Merida 97000, Yucatan, MexicoLorono-Pino, MA, Univ Autonoma Yucatan, Lab Arbovirol, Ctr Invest Reg Dr Hideyo Noguchi, Av Itzaes 490 X 59, Merida 97000, Yucatan, Mexico TI - Introduction of the American/Asian genotype of dengue 2 virus into the Yucatan State of Mexico AB - A dengue (DEN) outbreak occurred in the Yucatan State of Mexico in 2002. Three isolates were obtained from patients presenting with DEN-like symptoms, and examined by partial nucleotide sequencing and phylogenetic analysis. The isolates were identified as DEN-2 viruses of the American-Asian genotype; this is the first report of this genotype in the Yucatan State. The DEN-2 viruses of the American-Asian genotype have been associated with more severe disease outcomes. Thus, its introduction into the Yucatan State presents a serious problem to public health authorities. During this outbreak, DEN virus infection was confirmed in 18% (282 of 1,560) of the patients who presented with DEN-like symptoms. Of these, 87 (31%) patients met the World Health Organization criteria for dengue hemorrhagic fever, including two patients who died. The majority (77%) of the patients experienced secondary infections in this epidemic MH - Mexico|Yucatan MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000224821000019 L2 - MONOCLONAL-ANTIBODIES; HEMORRHAGIC-FEVER; CUBAN EPIDEMIC; STRAINS; TYPE-2; IDENTIFICATION; SEROTYPE-2; DIAGNOSIS; SEQUENCES; OUTBREAK SO - American Journal of Tropical Medicine and Hygiene 2004 ;71(4):485-492 11474 UI - 3939 AU - Loser H AU - Mohanti M AD - UNAM, Inst Geol, Estac Reg Noroeste, Hermosillo 83000, Sonora, MexicoUtkal Univ, Dept Geol, Bhubaneswar 751004, Orissa, IndiaLoser, H, UNAM, Inst Geol, Estac Reg Noroeste, Apartado Postal 1039, Hermosillo 83000, Sonora, Mexico TI - A Cenomanian coral assemblage from southern India AB - Six hermatypic coral species [Adelocoenia desori (KOBY, 1897), Isastrea minima PREVER, 1909, Montlivaltia icaunensis D'ORBIGNY, 1850, Rennensismilia cf. inflexa (REUSS, 1854), Phyllocoenia pomeli PERON & THOMAS, 1893, Dimorphastrea grandiflora D'ORBIGNY, 1850] from mixed carbonate-siliciclastic sediments of the Cenomanian (Upper Cretaceous) of the Karai Formation (Uttattur Group) of southern India are described. Four of them are colonial and two are solitary corals. The fauna compares well with Early Cretaceous to Cenomanian corals from northern and central Europe in particular. No relationships exist with the Late Albian coral faunas from southern India described in the 19th century, which is attributed to differences in the facies MH - India MH - Mexico|Sonora PB - STUTTGART: E SCHWEIZERBARTSCHE VERLAGS RP - NOT IN FILE U3 - TC 0 U4 - Paleontology U5 - J;Article AV - English IS - 0028-3630 UR - ISI:000224799700001 SO - Neues Jahrbuch fur Geologie und Palaontologie-Monatshefte 2004 ;(10):577-594 11475 UI - 5782 AU - Loukianov AG AU - Canedo JM AU - Utkin VI AU - Cabrera-Vazquez J AD - IPN, Ctr Invest & Estudios Avanzados, Guadalajara 44550, Jalisco, MexicoOhio State Univ, Dept Elect Engn, Columbus, OH 43210, USALoukianov, AG, IPN, Ctr Invest & Estudios Avanzados, Guadalajara 44550, Jalisco, Mexico TI - Discontinuous controller for power systems: Sliding-mode block control approach AB - Based on the complete model of the plant, a sliding-mode stabilizing controller for synchronous generators is designed. The block control approach is used in order to derive a nonlinear sliding surface, on which the mechanical dynamics are linearized. This combined approach enables us to compensate the inherent nonlinearities of the generator and to reject high-level external disturbances. A nonlinear observer is designed for estimation of the rotor fluxes and mechanical torque MH - Mexico|Jalisco MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 0278-0046 UR - ISI:000220656700010 L2 - nonlinear system;observer;power system control;sliding-mode control;synchronous generator;VARIABLE-STRUCTURE SYSTEMS; SYNCHRONOUS GENERATOR; EXCITATION CONTROL; DESIGN; STABILIZER SO - Ieee Transactions on Industrial Electronics 2004 ;51(2):340-353 11476 UI - 4415 AU - Lovell AJ AU - Kallivayalil N AU - Schloerb FP AU - Combi MR AU - Hansen KC AU - Gombosi TI AD - Agnes Scott Coll, Decatur, GA 30030, USAInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Penn, Philadelphia, PA 19104, USAUniv Massachusetts, Five Coll Radio Astron Observ, Amherst, MA 01003, USAUniv Michigan, Ann Arbor, MI 48109, USALovell, AJ, Agnes Scott Coll, Decatur, GA 30030, USA TI - On the effect of electron collisions in the excitation of cometary HCN AB - The electron-HCN collision rate for the excitation of rotational transitions of the HCN molecule is evaluated in comets C/1995 O1 (Hale-Bopp) and C/1996 B2 (Hyakutake). Based on theoretical models of the cometary atmosphere, we show that collisions with electrons can provide a significant excitation mechanism for rotational transitions in the HCN molecule. Computed values of the cross section sigma(e)-HCN can be as high as 1.3 x 10(-12) cm(2), more than 2 orders of magnitude greater than the commonly assumed HCN-H2O cross section. For the ground rotational transitions of HCN, the electron-HCN collision rate is found to exceed the HCN-H2O collision rate at distances greater than 3000 km from the cometary nucleus of Hale-Bopp and 1000 km from that of Hyakutake. Collisional excitation processes dominate over radiative excitation processes up to a distance of 160,000 km from the cometary nucleus of Hale-Bopp and 50,000 km from that of Hyakutake. Excitation models that neglect electron collisions can underestimate the HCN gas production rates by as much as a factor of 2 MH - Mexico|Puebla MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224074400054 L2 - comets : general;molecular processes;C/1996 B2 HYAKUTAKE; BOPP 1995 O1; HALE-BOPP; HYDROGEN-CYANIDE; MOLECULES; HALLEY; COMA; H2O; CN SO - Astrophysical Journal 2004 ;613(1):615-621 11477 UI - 5779 AU - Loyo-Rosales JE AU - Rosales-Rivera GC AU - Lynch AM AU - Rice CP AU - Torrents A AD - Univ Maryland, Dept Civil & Environm Engn, Environm Engn Program, College Pk, MD 20742, USAUNAM, FES Zaragoza, Area Quim, Mexico City 09239, DF, MexicoNW High Sch, Dept Sci, Germantown, MD 20874, USAUSDA ARS, Environm Qual Lab, ANRI, Beltsville, MD 20705, USATorrents, A, Univ Maryland, Dept Civil & Environm Engn, Environm Engn Program, College Pk, MD 20742 USA TI - Migration of nonylphenol from plastic containers to water and a milk surrogate AB - Nonylphenol (NP) is used as an antioxidant and plasticizer in some plastic products. After the discovery of its endocrine-disrupting potential, concern over human exposure to this chemical has increased. Recently, a group in Germany estimated the average daily intake of NP from food (7.5 mug/day), excluding water. In the present study, NP, octylphenol (OP), and their respective ethoxylates (1-5) were measured in spring water bottled in three different types of plastic (HDPE, PET, and PVC). NP was present in water from HDPE and PVC containers, at 180 and 300 ng/L respectively, which represent 4.8% and 8% of the value calculated by the German group assuming a consumption of 2 L of water per day. OP was found in water from HDPE extracts in lower amounts, 12 ng/L, and neither the NP- nor the OP-ethoxylates were detected in any of the samples. Attempts to measure these compounds in tap water were unsuccessful, probably because reaction with residual chlorine results in the formation of chlorinated byproducts. Migration of NP from HDPE containers to a milk surrogate was also evaluated; results indicate that the amounts of NP leaching into milk might be similar to those in bottled water MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000220636900036 L2 - nonylphenol;bottled water;migration;plastic;LC/MS/MS;HDPE;PET;PVC;LIQUID-CHROMATOGRAPHY; ALKYLPHENOL POLYETHOXYLATES; MASS-SPECTROMETRY; PET BOTTLES; ETHOXYLATES; FOODS SO - Journal of Agricultural and Food Chemistry 2004 ;52(7):2016-2020 11478 UI - 5112 AU - Lozada-Cassou M AU - Barbosa MC AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUFRGS, Inst Fis, BR-91501970 Porto Alegre, RS, BrazilLozada-Cassou, M, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent Mazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Proceedings of The Second International Conference on Applied Statistical Physics: Molecular Engineering (Puerto Vallarta, Mexico, 24-29 August 2003) MH - Brazil MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Editorial Material AV - English IS - 0953-8984 UR - ISI:000222194000001 SO - Journal of Physics-Condensed Matter 2004 ;16(22): 11479 UI - 4993 AU - Lozano R AU - Castillo P AU - Dzul A AD - Heudiasysc, UTC, CNRS, UMR 6599, F-60205 Compiegne, FranceInst Tecnol Laguna, Div Estudios Posgrado & Invest, Torreon 27000, Coahuila, MexicoLozano, R, Heudiasysc, UTC, CNRS, UMR 6599, BP 20529, F-60205 Compiegne, France TI - Global stabilization of the PVTOL: real-time application to a mini-aircraft AB - We present a simple non-linear controller based on Lyapunov analysis for a planar vertical take-off and landing aircraft (PVTOL). It is proved that the proposed control scheme is globally asymptotically stable. The controller performance is shown in a real-time application MH - France MH - Mexico|Coahuila PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000222500300004 L2 - VTOL AIRCRAFT; SYSTEMS SO - International Journal of Control 2004 ;77(8):735-740 11480 UI - 6012 AU - Lozano R AU - Castillo P AU - Garcia P AU - Dzul A AD - Heudiasyc Univ Technol Compiegne, UMR 6599, Ctr Rech Royallieu, F-60205 Compiegne, FranceUniv Politecn Valencia, Dept Syst Engn & Control, E-46071 Valencia, SpainInst Tecnol Laguna, Div Estudios Posgrado & Invest, Torreon 27000, Coahuila, MexicoLozano, R, Heudiasyc Univ Technol Compiegne, UMR 6599, Ctr Rech Royallieu, BP 20529, F-60205 Compiegne, France TI - Robust prediction-based control for unstable delay systems: Application to the yaw control of a mini-helicopter AB - We present a discrete-time prediction-based state-feedback controller. It is shown that this controller stabilizes possibly unstable continuous-time delay systems. The stability is shown to be robust with respect to uncertainties in the knowledge on the plant parameters, the system delay and the sampling period. The proposed prediction-based controller has been tested in a real-time application to control the yaw angular displacement of a 4-rotor mini-helicopter. (C) 2004 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Coahuila MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000220166400006 L2 - delay systems;pole-placement;Lyapunov methods;recursive control algorithms;helicopters;FINITE SPECTRUM ASSIGNMENT SO - Automatica 2004 ;40(4):603-612 11481 UI - 2745 AU - Luca F AU - Mireles DJ AU - Shparlinski IE AD - Univ Nacl Autonoma Mexico, Math Inst, Morelia, Michoacan, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaLuca, F, Univ Nacl Autonoma Mexico, Math Inst, CP 58180, Morelia, Michoacan, Mexico TI - Mov attack in various subgroups on elliptic curves AB - We estimate the probabilities that the Menezes-Okamoto-Vanstone reduction of the discrete logarithm problem on an elliptic curve E to the discrete logarithm problem in a certain finite field succeeds for various groups on points on E. Our bounds imply that in all interesting cases these probabilities are exponentially small. This extends results of Balasubramanian and Koblitz who have treated the instance in which the order of the group of points on E is prime MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - URBANA: UNIV ILLINOIS URBANA-CHAMPAIGN RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0019-2082 UR - ISI:000227832600021 L2 - DISCRETE LOGARITHMS; INTEGERS SO - Illinois Journal of Mathematics 2004 ;48(3):1041-1052 11482 UI - 4000 AU - Lugo-Licona M AU - Miranda J AU - Romo-Kroger CM AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Catolica Maule, Tarapaca, ChileLugo-Licona, M, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - L-shell X-ray production cross section measured by heavy ion impact on selected rare earth elements AB - The production cross sections of L-shell X-ray of some rare earth elements have been measured by collision of C-12(4+) and O-16(4+) ions of 0.5 to 0.75 MeV/amu. The results were compared with experimental data of other authors and with theoretical predictions gained by the ECPSSR and ECPSSR plus multiple ionization (ECPSSR+MI) models. For atomic parameters (fluorescence yields and probabilities for Coster-Kronig transitions) the role of several databases were studied. The ECPSSR theory underestimates cross sections when compared with experimental results obtained in the present work, but ECPSSR+MI has a better agreement with the experimental data MH - Chile MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Analytical;Chemistry, Inorganic & Nuclear;Nuclear Science & Technology U5 - J;Article AV - English IS - 0236-5731 UR - ISI:000224857800012 L2 - L-SUBSHELL IONIZATION; 32-MEV OXYGEN IONS; MEV CARBON-IONS; K-SHELL; MULTIPLE IONIZATION; COULOMB IONIZATION; CHARGED-PARTICLES; ATOM COLLISIONS; 25-MEV CARBON; ENERGY-RANGE SO - Journal of Radioanalytical and Nuclear Chemistry 2004 ;262(2):391-401 11483 UI - 4106 AU - Lugo J AU - Lizano S AU - Garay G AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUMSNH, Inst Phys Matemat, Morelia 58040, Michoacan, MexicoUniv Chile, Dept Astron, Santiago, ChileLugo, J, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Apartado Postal 72-3 Xangari, Morelia 58089, Michoacan, Mexico TI - Photoevaporated disks around massive young stars AB - We present a parametric model of an isothermal photoevaporating wind from a Keplerian disk around a young massive star. The wind is produced by high-energy photons (h(nu)>13.6 eV) from the massive central star that ionize and heat the material of the circumstellar disk, as discussed several years ago by Hollenbach and coworkers. The model gives the velocity and density structure of the ionized winds. Because of its simplicity, it is very useful to explore the physical conditions of this type of wind. The model can also describe the photoevaporation of disks around low-mass young stars. We obtain the free-free continuum emission of the photoevaporated flows and compare with the spectral energy distribution of the known bipolar sources MWC 349 A and NGC 7538 IRS 1 MH - Chile MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-637X UR - ISI:000224700200026 L2 - HII regions;hydrodynamics;stars : formation;stars : winds, outflows;H-II-REGIONS; APERTURE SYNTHESIS OBSERVATIONS; EMISSION-LINE STARS; MILLIMETER CONTINUUM MEASUREMENTS; EXTRAGALACTIC RADIO-SOURCES; GHZ METHANOL MASERS; MWC 349; RECOMBINATION LINE; NGC 7538; PROTOSTELLAR DISKS SO - Astrophysical Journal 2004 ;614(2):807-817 11484 UI - 3997 AU - Luna JJ AU - Riesewijk A AU - Horcajadas JA AU - de van Os R AU - Dominguez F AU - Mosselman S AU - Pellicer A AU - Simon C AD - Univ Valencia, Sch Med, Fdn Inst Valenciano Infertilidad, Valencia, SpainUniv Valencia, Sch Med, Dept Pediat Obstet & Gynecol, Valencia, SpainInst Ciencias Reprod Humana, Guanajuato, MexicoNV Organon, Dept Target Discovery, Oss, NetherlandsNV Organon, Dept Pharmacol, Oss, NetherlandsSimon, C, Plaza Policia Local 3, Valencia 46015, Spain TI - Gene expression pattern and immunoreactive protein localization of LGR7 receptor in human endometrium throughout the menstrual cycle AB - Relaxin (RLX) is a pregnancy-associated polypeptide hormone. In non-pregnant women, the peak of circulating relaxin coincides with the window of endometrial receptivity and both in vivo and in vitro experiments showed that it plays a role in the decidualization process. Recently, two receptors, LGR7 and LGR8, have been identified as high affinity receptors for relaxin. Here we describe LGR7 mRNA and protein expression in human endometrium using semi-quantitative and quantitative fluorescent PCR (Q-PCR) and immunohistochemical analyses. Three different experimental designs were used. First, endometrial biopsies from five different phases of the menstrual cycle were analysed. Secondly, we assessed the early luteal phase in more detail. Finally we analysed the expression at LH+2 (2 days after the natural LH surge, pre-receptive endometrium) versus LH+7 (receptive endometrium) within the same menstrual cycle from the same patient to avoid inter-cycle or inter-person variations in gene expression. Our results indicate that there is no consistent regulation of LGR7 mRNA expression, neither during the menstrual cycle nor during the early-mid-luteal phase. In general, we observed a large degree of variation in LGR7 mRNA expression levels between patients. LGR7 immunoreactive protein was identified in all stages of the menstrual cycle. LGR7 protein was localized in both the epithelial and the stromal compartments, except for the mid-luteal phase when the expression was restricted to the endometrial epithelium. We conclude that no consistent regulation of LGR7 mRNA expression can be detected in human endometrium during the menstrual cycle MH - Mexico|Guanajuato MH - Netherlands MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 14 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1360-9947 UR - ISI:000224887000002 L2 - endometrium;LGR7 receptor;relaxin;ENDOTHELIAL GROWTH-FACTOR; MONOCLONAL-ANTIBODIES; MARMOSET MONKEY; EARLY-PREGNANCY; STROMAL CELLS; RAT RELAXIN; IN-VITRO; PROLACTIN; HORMONE; BINDING SO - Molecular Human Reproduction 2004 ;10(2):85-90 11485 UI - 5606 AU - Luna M AU - Huerta L AU - Berumen L AU - Martinez-Coria H AU - Harvey S AU - Aramburo C AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Cellular & Mol Neurobiol, Queretaro 76001, Qro, MexicoUniv Alberta, Dept Physiol, Edmonton, AB T6G 2H7, CanadaUniv Alberta, Perinatal Res Ctr, Edmonton, AB T6G 2H7, CanadaAramburo, C, Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Cellular & Mol Neurobiol, Campus UNAM UAQ Juriquilla,AP 1-1141, Queretaro 76001, Qro, Mexico TI - Growth hormone in the male reproductive tract of the chicken: heterogeneity and changes during ontogeny and maturation AB - Growth hormone (GH) gene expression is not confined to pituitary somatotrophs and occurs in many extrapituitary tissues. In this study, we describe the presence of GH moieties in the chicken testis. GH-immumoreactivity (GH-IR), determined by ELISA, was found in the testis of immature and mature chickens, but at concentrations <1% of those in the pituitary gland. The immunoassayable GH concentration in the testis was unchanged between 4 and 66 weeks of age, and approximately 10-fold higher than that at 1-week of age and 25-fold higher than that in 1-day-old chicks and perinatal (embryonic day 18) embryos. This immunoreactivity was associated with several proteins of different molecular size, as in the pituitary gland, when analyzed by SDS-PAGE under reducing conditions. However, while most of the GH-IR in the pituitary (similar to40 and 15% respectively) is associated with monomer (26 kDa) or dimer (52 kDa) GH moieties GH-IR in the testis is primarily (30-50%) associated with a 17 kDa moiety. GH bands between 32 and 45 kDa are also relatively more abundant in the testis than in the pituitary. During ontogeny the relative abundance of a 14 kDa GH and 40 kDa GH moieties in the testis significantly declined, whereas the relative abundance of the 17 and 45 kDa moieties increased with advancing age. In adult birds, GH-IR was widespread and intense in the sentiniferous tubules. Although the GH-IR was not present in the basal compartment of Sertoli cells, nor in spermatogonia and primary spermatocytes, it was abundantly present in secondary spermatocytes and spermatids in the luminal compartments of the tubules as well as in some surrounding myocytes and interstitial cells. In summary, immunoreactive GH moieties are present in the chicken testis but at concentrations far less than in the pituitary. Age-related changes in the relative abundance of testicular GH variants may be related to local (autocrine/paracrine) actions of testicular GH. The localization of GH in spermatocytes and spermatids suggests hitherto unsuspected roles in gamete development. (C) 2004 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0016-6480 UR - ISI:000221180600005 L2 - chicken growth hormone;testis;GH heterogeneity;testicular GH;MESSENGER-RIBONUCLEIC-ACID; RECEPTOR-BINDING PROTEIN; GH-RELEASING HORMONE; CGH CHARGE VARIANTS; FACTOR-I; CELLULAR-LOCALIZATION; GENE-EXPRESSION; RAT TESTIS; IMMUNE TISSUES; RAINBOW-TROUT SO - General and Comparative Endocrinology 2004 ;137(1):37-49 11486 UI - 3428 AU - Luna R AU - Zepeda A AU - Garcia Canal CA AU - Sciutto SJ AD - CINVESTAV, Dept Fis, Mexico City 07360, DF, MexicoNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaNatl Univ La Plata, IFLP, CONICET, RA-1900 La Plata, ArgentinaLuna, R, CINVESTAV, Dept Fis, Ave IPN 2508,Colonia San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Influence of diffractive interactions on cosmic ray air showers AB - A comparative study of commonly used hadronic collision simulation packages is presented. The characteristics of the products of hadron-nucleus collisions are analyzed from a general perspective, but focusing on their correlation with diffractive processes. One of the purposes of our work is to give quantitative estimations of the impact that different characteristics of the hadronic models have on air shower observables. Several sets of shower simulations using different settings for the parameters controlling the diffractive processes are used to analyze the correlations between diffractivity and shower observables. We find that the relative probability of diffractive processes during the shower development have a non-negligible influence over the longitudinal profile as well as the distribution of muons at ground level. The implications on experimental data analysis are discussed MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000226054700066 L2 - ENERGIES; CASCADES; MODEL SO - Physical Review D 2004 ;70(11): 11487 UI - 5586 AU - Lupercio E AU - Uribe B AD - CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoUniv Michigan, Dept Math, Ann Arbor, MI 48109, USAMax Planck Inst Math, D-5300 Bonn, GermanyLupercio, E, CINVESTAV, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Inertia orbifolds, configuration spaces and the ghost loop space AB - In this paper we define and study the ghost loop orbifold LsX of an orbifold X consisting of those loops that remain constant in the coarse moduli space of X. We construct a configuration space model for LsX using an idea of G. Segal. From this we exhibit the relation between the Hochschild and cyclic homologies of the inertia orbifold of X (that generate the so-called twisted sectors in string theory) and the ordinary and equivariant homologies of LsX. We also show how this clarifies the relation between Chen-Ruan orbifold cohomology, Hochschild homology, and periodic cyclic homology MH - Germany MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0033-5606 UR - ISI:000221219100004 L2 - CYCLIC HOMOLOGY; GROUPOIDS; COHOMOLOGY SO - Quarterly Journal of Mathematics 2004 ;55():185-201 11488 UI - 6060 AU - Lupercio E AU - Uribe B AD - CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoUniv Michigan, Dept Math, Ann Arbor, MI 48109, USALupercio, E, CINVESTAV, Dept Matemat, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Gerbes over orbifolds and twisted K-theory AB - In this paper we construct an explicit geometric model for the group of gerbes over an orbifold X. We show how from its curvature we can obtain its characteristic class in H-3(X) via Chern-Weil theory. For an arbitrary gerbe , a twisting K-orb(X) of the orbifold K-theory of X is constructed, and shown to generalize previous twisting by Rosenberg [28], Witten [35], Atiyah-Segal [2] and Bowknegt et. al. [4] in the smooth case and by Adem-Ruan [1] for discrete torsion on an orbifold MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0010-3616 UR - ISI:000220053900002 L2 - BUNDLE GERBES SO - Communications in Mathematical Physics 2004 ;245(3):449-489 11489 UI - 3176 AU - Luz LVM AU - Caceres-Carrizosa N AU - Robles-Burgueno MDR AU - Hernandez J AU - Guzman R AD - Ctr Invest Alimentac & Desarrollo, Coordinac Ciencia Alimentos, Hermosillo 83000, Sonora, MexicoUniv Arizona, Dept Environm Chem & Engn, Tucson, AZ 85721, USA TI - Macroporous chitin membranes used as a hydrophobic interaction matrix for porcine immunoglobulin isolation MH - Mexico|Sonora MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223712800222 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U62-U62 11490 UI - 5320 AU - Luzon F AU - Ramirez L AU - Sanchez-Sesma FJ AU - Posadas A AD - Univ Almeria, Dept Fis Aplicada, Almeria, SpainInst Andaluz Geofis & Prevenc Desastres Sismicos, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoLuzon, F, Univ Almeria, Dept Fis Aplicada, Canada San Urbano S-N 04120, Almeria, Spain TI - Simulation of the seismic response of sedimentary basins with vertical constant-gradient velocity for incident SH waves AB - The simulation of the seismic response of heterogeneous sedimentary basins under incident plane waves is computed using the Indirect Boundary Element Method (IBEM). To deal with these kinds of basins we used approximate analytical expressions for the two-dimensional Green's functions of a medium with constant-gradient wave propagation velocity. On the other hand, for the homogeneous half space underlying the sedimentary basin, the full space Green's functions were used. The response of semi-circular heterogeneous basins under incident SH waves is explored by means of the displacements in the frequency-space diagrams and synthetic seismograms. Moreover, we compared these results with those obtained for other homogeneous semi-circular models. The principal differences among them are pointed out. This simulation provided interesting results that displayed a complex amplification pattern in a rich spectrum of frequencies and locations. The maximum amplitudes levels were found around the edges of the heterogeneous sedimentary basins. In time domain some features characterize the seismic response of the basin which include enhanced generation and trapping of surface waves inside the sediments, and the reduced emission of seismic energy to the hard rock. In the heterogeneous models the lateral reflections of surface waves greatly influence the total displacements at the free surface in comparison with the homogeneous models where the displacements have a shared influence among both vertical and lateral reflections MH - Mexico|Distrito Federal MH - Spain PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0033-4553 UR - ISI:000221786000015 L2 - boundary element method;Green's function;vertical heterogeneity;sedimentary basins;strong ground motion;seismology;BOUNDARY-ELEMENT METHOD; RAYLEIGH-WAVES; ELASTIC-WAVES; ALLUVIAL VALLEYS; SURFACE MOTION; P-WAVES; PROPAGATION; DIFFRACTION; EARTHQUAKE; DEPOSITS SO - Pure and Applied Geophysics 2004 ;161(7):1533-1547 11491 UI - 6162 AU - Luzon F AU - Gil-Zepeda SA AU - Sanchez-Sesma FJ AU - Ortiz-Aleman C AD - Univ Almeria, Dept Fis Aplicada, Almeria 04120, SpainUniv Granada, Inst Andaluz Geofis & Prevenc Desastres Sism, E-18071 Granada, SpainUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoLibramiento Inst Tecnol Tehuacan SN, Inst Tecnol Tehuacan, Tehuacan 75770, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoLuzon, F, Univ Almeria, Dept Fis Aplicada, Canada San Urbano S-N, Almeria 04120, Spain TI - Three-dimensional simulation of ground motion in the Zafarraya Basin (Southern Spain) up to 1.335 Hz under incident plane waves AB - The Zafarraya Basin is one of the intramountain Neogene basins of the Betic mountains (Southern Spain) located in one of the regions with the highest hazard level in the Iberian Peninsula. In this paper we use the indirect boundary element method (IBEM) to compute the 3-D ground motion of the Zafarraya Basin under incident P and S waves. We solve the linear system of equations obtained in the IBEM by using a partition matrix method that has been found more efficient than the classic L . U decomposition used in previous works. Our results show that the horizontal displacements are greatly amplified both in amplitude and duration in those components where direct motion exists (radial for P and SV waves, and transverse for SH waves). In any case, the other horizontal displacements where no direct motion exists are not negligible. The most important amplifications are produced at the south of the Zafarraya Basin, where two features characterize these sites: first the depth of the basin is the largest, and second, these locations are near the end of the basin where a very steep boundary exists. Some of the waves that have produced the increase in duration have been interpreted as surface waves, which in some cases provide characteristic polarization patterns MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000189201000016 L2 - boundary element method;inelastic waves;local seismic effects;numerical modelling;3-D propagation;Zafarraya Basin;RAYLEIGH-WAVES; SEISMIC RESPONSE; S-WAVES; P-WAVES; EARTHQUAKES; MICROTREMOR; PROPAGATION; DIFFRACTION SO - Geophysical Journal International 2004 ;156(3):584-594 11492 UI - 6635 AU - Lycka B AU - Bazan C AU - Poletti E AU - Treen B AD - Autonomous Univ Guadalajara, DermaNorte Grp, Guadalajara, Jalisco, MexicoNatl Autonomous Univ Mexico, DermaNorte Grp, Mexico City 04510, DF, MexicoAdv Dermatol & Laser Ctr, Greenville, SC, USAUniv Alberta, AgeDefYing Dermatol, Edmonton, AB T5T 1T2, CanadaLycka, B, Univ Alberta, AgeDefYing Dermatol, 780 10665 Jasper Ave, Edmonton, AB T5T 1T2, Canada TI - The emerging technique of the antiptosis subdermal suspension thread AB - Background. The improvement in and rejuvenation of facial features through the array of facioplasty techniques currently available remains intimately linked with the risk of complications associated with the cosmetic surgery procedure. The need for novel approaches to cosmetic facial surgery that achieve the desired end result for the patient while minimizing inherent risks and complications for the surgeon is acute. Objective. To determine the efficacy of the Aptos subdermal suspension thread technique as an alternative to current facioplasty options through a studied series of this procedure. Methods. Three hundred fifty Aptos procedures were performed on female patients as office-based, single-surgery procedures over a 43-month period. The procedure outcome was assessed in each case through patient interviews and surgeons' observations. Results. Three hundred forty eight of the 350 Aptos procedures resulted in a completely satisfactory end point of facial rejuvenation. No major complications were reported, and mild asymmetry, ecchymosis, erythema, bleeding, visible threads, swelling, and discomfort were the only minor. Transient complications and side effects were noted. Conclusion. Our case study strongly suggests that the Aptos subdermal suspension thread technique provides an effective and much safer alternative to current facioplasty procedures for facial rejuvenation MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 12 U4 - Dermatology;Surgery U5 - J;Article AV - English IS - 1076-0512 UR - ISI:000187571600008 SO - Dermatologic Surgery 2004 ;30(1):41-44 11493 UI - 5129 AU - M'Passi-Mabiala B AU - Meza-Aguilar S AU - Demangeat C AD - Univ Marien NGouabi, LME, Dept Phys, Brazzaville, CongoIPCMS, F-63034 Strasbourg 2, FranceUniv Autonoma Sinaloa, ECFM, Sinaloa 80010, MexicoM'Passi-Mabiala, B, Univ Autonoma Sinaloa, ECFM, Av Amer & Blvd Univ, Sinaloa 80100, Mexico TI - Magnetic structure of FeMn thin films on Co(001) FCC substrate AB - LEED experiments by Offi et al. (Phys. Rev. B 66 (2002) 064419) have recently revealed that the Fe50Mn50 alloy thin films keeps the FCC structure when growing on Cu(001) and on Co/Cu(001). Stability of magnetic configurations of Fe50Mn50 alloy monolayer film is investigated using ab-initio calculations within density functional theory with gradient corrections. Fe induced magnetic moment of 2.85 mu(B) with Mn magnetic moment of 3.61 mu(B) aligned parallel with the ferromagnetic moment of the Co layer have been found as groundstate configuration with the Perdew-Wang functional in agreement with X-ray magnetic circular dichroism results. (C) 2003 Elsevier B.V. All rights reserved MH - Congo MH - France MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700200 L2 - iron;manganese;cobalt;magnetic surface;density functional calculations SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():1217-1218 11494 UI - 3123 AU - Ma E AU - Mondragon M AU - Zoupanos G AD - Univ Calif Riverside, Dept Phys, Riverside, CA 92521, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNatl Tech Univ Athens, Dept Phys, Athens, GreeceMa, E, Univ Calif Riverside, Dept Phys, Riverside, CA 92521, USA TI - Finite SU(N)(k) unification AB - We consider N = 1 supersymmetric gauge theories based on the group SU (N)(1) x SU (N)(2) x (...) x SU (N)(k) with matter content (N, N*, 1,..., 1) + ( 1, N, N*,..., 1) + (...) + ( N*, 1, 1,..., N) as candidates for the unifcationsymmetry of all particles. In particular we examine to which extent such theories can become finite and we find that a necessary condition is that there should be exactly three families. We discuss further some phenomenologic issues related to the cases (N; k) = (3; 3), (3; 4), and (4; 3), in an attempt to choose those theories that can become also realistic. Thus we are naturally led to consider the SU(3)(3) model which we first promote to an all-loop finite theory and then we study its additional predictions concerning the top quark mass, Higgs mass and supersymmetric spectrum MH - Greece MH - Mexico|Distrito Federal MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1126-6708 UR - ISI:000226916900026 L2 - supersymmetry phenomenology;beyond standard model;supersymmetric standard model;GUT;SOFT SUPERSYMMETRY-BREAKING; GRAND UNIFIED THEORIES; GAUGE-THEORIES; DIMENSIONAL REDUCTION; COUPLING-CONSTANTS; ASYMPTOTIC FREEDOM; SYMMETRY-BREAKING; MASS GENERATION; BETA-FUNCTIONS; PROTON DECAY SO - Journal of High Energy Physics 2004 ;(12): 11495 UI - 5811 AU - Ma YG AU - Wada R AU - Hagel K AU - Wang J AU - Keutgen T AU - Majka Z AU - Murray M AU - Qin L AU - Smith P AU - Natowitz JB AU - Alfaro R AU - Cibor J AU - Cinausero M AU - El Masri Y AU - Fabris D AU - Fioretto E AU - Keksis A AU - Lunardon M AU - Makeev A AU - Marie N AU - Martin E AU - Martinez-Davalos A AU - Menchaca-Rocha A AU - Nebbia G AU - Prete G AU - Rizzi V AU - Ruangma A AU - Shetty DV AU - Souliotis G AU - Staszel P AU - Veselsky M AU - Viesti G AU - Winchester EM AU - Yennello SJ AD - Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843, USAChinese Acad Sci, Shanghai Inst Nucl Res, Shanghai 201800, Peoples R ChinaUCL, Louvain, BelgiumJagiellonian Univ, Krakow, PolandUNAM, Inst Fis, Mexico City, DF, MexicoInst Nucl Phys, Krakow, PolandIst Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, ItalyIst Nazl Fis Nucl, I-35131 Padua, ItalyUniv Padua, Dipartimento Fis, I-35131 Padua, ItalyInst Sci Mat & Rayonnement, LPC, CNRS, IN2P3, F-14050 Caen, FranceUniv Caen, F-14050 Caen, FranceMa, YG, Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843, USA TI - Evidence of critical behavior in the disassembly of nuclei with A similar to 36 AB - A wide variety of observables indicate that maximal fluctuations in the disassembly of hot nuclei with Asimilar to36 occur at an excitation energy of 5.6+/-0.5 MeV/nucleon and temperature of 8.3+/-0.5 MeV. Associated with this point of maximal fluctuations are a number of quantitative indicators of apparent critical behavior. The associated caloric curve does not appear to show a flattening such as that seen for heavier systems. This suggests that, in contrast to similar signals seen for liquid-gas transitions in heavier nuclei, the observed behavior in these very light nuclei is associated with a transition much closer to the critical point MH - Belgium MH - France MH - Italy MH - Mexico|Distrito Federal MH - Peoples R China MH - Poland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000220607200008 L2 - HEAVY-ION COLLISIONS; HOT NUCLEI; PHASE-TRANSITION; CALORIC CURVE; MULTIFRAGMENTATION; MEV/U; FRAGMENTATION; TEMPERATURES; INSTABILITY; EMISSION SO - Physical Review C 2004 ;69(3): 11496 UI - 4768 AU - Ma ZQ AU - Dong SH AU - Gu XY AU - Yu JA AU - Lozada-Cassou M AD - Inst High Energy Phys, Beijing 100039, Peoples R ChinaInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoDong, SH, Inst High Energy Phys, Beijing 100039, Peoples R China TI - The Klein-Gordon equation with a coulomb plus scalar potential in D dimensions AB - The solutions of the Klein-Gordon equation with a Coulomb plus scalar potential in D dimensions are exactly obtained. The energy E(n, l, D) is analytically presented and the dependence of the energy E(n, l, D) on the dimension D is analyzed in some detail. The positive energy E(n, 0, D) first decreases and then increases with increasing dimension D. The positive energy E(n, l, D) (l not equal 0) increases with increasing dimension D. The dependences of the negative energies E(n, 0, D) and E(n, l, D) (l not equal 0) on the dimension D axe opposite to those of the corresponding positive energies E(n, 0, D) and E(n, 1, D) (l not equal 0). It is found that the energy E(n, 0, D) is symmetric with respect to D = 2 for D is an element of (0, 4). It is also found that the energy E(n, l, D) (l not equal 0) is almost independent of the angular momentum quantum number l for large D and is completely independent of the angular momentum quantum number l if the Coulomb potential is equal to the scalar one. The energy E(n, l, D) is almost overlapping for large D MH - Mexico|Distrito Federal MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0218-3013 UR - ISI:000223111100004 L2 - Klein-Gordon equation;Coulomb potential;scalar potential;dimension D;DIRAC-EQUATION; HYDROGEN-ATOM; ANGULAR-MOMENTUM; D+1 DIMENSIONS; BOUND-STATES; QUANTUM; QUANTIZATION; SCHRODINGER; PARTICLE; SPHERE SO - International Journal of Modern Physics E-Nuclear Physics 2004 ;13(3):597-610 11497 UI - 5468 AU - mabile-Cuevas CF AU - Heinemann JA AD - Fdn LUSARA, Mexico City 08930, DF, MexicoUniv Canterbury, New Zealand Inst Gene Ecol, Christchurch 1, New ZealandNorwegian Inst Gene Ecol, Tromso, NorwayAmabile-Cuevas, CF, Fdn LUSARA, Apartado Postal 102-006, Mexico City 08930, DF, Mexico TI - Shooting the messenger of antibiotic resistance: plasmid elimination as a potential counter-evolutionary tactic MH - Mexico|Distrito Federal MH - New Zealand MH - Norway PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy U5 - J;Editorial Material AV - English IS - 1359-6446 UR - ISI:000221568100001 L2 - ESCHERICHIA-COLI; ASCORBIC-ACID; BACTERIA SO - Drug Discovery Today 2004 ;9(11):465-467 11498 UI - 5612 AU - MacDonald IR AU - Bohrmann G AU - Escobar E AU - Abegg F AU - Blanchon P AU - Blinova V AU - Bruckmann W AU - Drews M AU - Eisenhauer A AU - Han X AU - Heeschen K AU - Meier F AU - Mortera C AU - Naehr T AU - Orcutt B AU - Bernard B AU - Brooks J AU - de Farago M AD - Texas A&M Univ, Phys & Life Sci Dept, Corpus Christi, TX 78412, USAUniv Bremen, Fachbereich Geowissensch 5, D-28334 Bremen, GermanyUniv Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 045510, DF, MexicoInst Ciencias Mar & Limnol, Cancun, DF, MexicoLeibniz Inst Meereswissensch, IFM, GEOMAR, D-24148 Kiel, GermanyState Ocean Adm, Inst Oceanog 2, Zhejiang 310012, Peoples R ChinaUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Georgia, Athens, GA 30602, USATDI Brooks Int Inc, College Stn, TX 77845, USAAurensis SA, Madrid 28003, SpainMacDonald, IR, Texas A&M Univ, Phys & Life Sci Dept, 6300 Ocean Dr, Corpus Christi, TX 78412 USA TI - Asphalt volcanism and chemosynthetic life in the Campeche Knolls, Gulf of Mexico AB - In the Campeche Knolls, in the southern Gulf of Mexico, lava-like flows of solidified asphalt cover more than 1 square kilometer of the rim of a dissected salt dome at a depth of 3000 meters below sea level. Chemosynthetic tubeworms and bivalves colonize the sea floor near the asphalt, which chilled and contracted after discharge. The site also includes oil seeps, gas hydrate deposits, locally anoxic sediments, and slabs of authigenic carbonate. Asphalt volcanism creates a habitat for chemosynthetic life that may be widespread at great depth in the Gulf of Mexico MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China MH - Spain MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 18 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000221383300045 L2 - OIL; SEEPS SO - Science 2004 ;304(5673):999-1002 11499 UI - 3430 AU - Machado R AU - Stachiotti MG AU - Migoni RL AU - Tera AH AD - Univ Nacl Rosario, Fac Ciencias Exactas Ingn & Agrimensura, Inst Fis Rosario, RA-2000 Rosario, Santa Fe, ArgentinaNatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoMachado, R, Univ Nacl Rosario, Fac Ciencias Exactas Ingn & Agrimensura, Inst Fis Rosario, 27 Febrero 210 Bis, RA-2000 Rosario, Santa Fe, Argentina TI - First-principles determination of ferroelectric instabilities in Aurivillius compounds AB - The microscopic origin of ferroelectric instabilities in Aurivillius compounds is investigated from first principles using the full-potential linearized augmented plane-wave method. A comparative study of the ferroelectric instabilities in archetype materials like Bi2WO6, SrBi2Ta2O9, and Bi4Ti3O12 is investigated by a lattice-dynamics study of the paraelectric phase using the frozen-phonon approach. An analysis of the different displacement patterns displayed by the resulting unstable phonon modes gives insight into the microscopic origin of the ferroelectric transition and the different polarization behavior of the materials MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000226111400045 L2 - THIN-FILMS; ELECTRONIC-STRUCTURE; STRUCTURE REFINEMENT; OPTICAL-PROPERTIES; BISMUTH TITANATE; SINGLE-CRYSTALS; SRBI2TA2O9; BI4TI3O12; DEPENDENCE; LANTHANUM SO - Physical Review B 2004 ;70(21): 11500 UI - 5996 AU - Macias AE AU - Munoz JM AU - Herrera LE AU - Medina H AU - Hernandez I AU - Alcantar D AU - de Leon SP AD - Fac Med Leon, Leon Guanajuato 37320, MexicoUniv Guanajuato, Sch Med, Leon, SpainNatl Autonomous Univ Mexico, Dept Expt Med, Mexico City 04510, DF, MexicoNatl Inst Med Sci & Nutr, Mexico City, DF, MexicoMacias, AE, Fac Med Leon, 20 Enero 929, Leon Guanajuato 37320, Mexico TI - Nosocomial pediatric bacteremia: The role of intravenous set contamination in developing countries AB - OBJECTIVE: To assess the rate of bacterial contamination of intravenous administration sets at their rubber injection ports and matching infusates. DESIGN: Cultures of injection ports and infusate during 26 visits to 4 hospitals. SETTING: Four public general pediatric hospitals in Mexico City with substandard care practices. PATIENTS: Hospitalized pediatric patients receiving intravenous solutions. RESULTS: Overall, 176 of 251 injection ports were contaminated (70.1%; 95% confidence interval [Cl-95], 64.5% to 75.8%), 35 (13.9%; Cl-95, 9.7% to 18.2%) with gram-negative rods, primarily of the tribe klebsielleae. Cultures of infusates were positive in 17 cases (6.8%, Cl-95, 3.7% to 9.9%), 5 of which grew gram-negative rods (2%; Cl-95, 0.6% to 4.6%). In 3 cases (1.2%), the same species with gram-negative rods was found in the infusates and on the injection ports. During one visit, 8 clustered cases of injection port contamination with a clonal Enterobacter cloacae were found; this agent was also found in the blood culture, intravenous fluid, and parenteral nutrition of one patient. Inadequate chlorination of tap water, a potential risk factor, was recorded during 22 visits (84.6%). CONCLUSION: These data suggest that external contamination of the intravenous administration set could play a role in infusate contamination Infect Control Hosp Epidemiol 2004;25: 226-230) MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Spain PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health;Infectious Diseases U5 - J;Article AV - English IS - 0899-823X UR - ISI:000220205700011 L2 - GRAM-NEGATIVE BACTEREMIA; PARENTERAL INFUSIONS; ADMINISTRATION SETS; INFECTIONS; PREVENTION; INTERVALS; EPIDEMIC; 48-HOUR; MEXICO; SAFE SO - Infection Control and Hospital Epidemiology 2004 ;25(3):226-230 11501 UI - 3925 AU - Macias AH AU - Gonzalez-Hernandez J AU - Saldana JM AU - Herrera-Fierro P AU - Garcia-Jimenez P AU - Beltran FJE AU - Scholz T AU - Schneider GA AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Queretaro 76230, MexicoEnergy Convers Devices Inc, Rochester, MI 48309, USATech Univ Hamburg, Adv Ceram Grp, D-21073 Hamburg, GermanyGonzalez-Hernandez, J, IPN, Ctr Invest & Estudios Avanzados, Unidad Queretaro, Libramiento Norponiente 2000,Fracc Real Juriquill, Queretaro 76230, Mexico TI - Mechanical characterization of thin amorphous tungsten-carbon (W-x C-y) films prepared by DC-cosputtering AB - The mechanical properties of thin amorphous tungsten-carbon films (W-X C-Y) deposited on unheated substrates by non-reactive DC-cosputtering were characterized by nanoindentation as a function of the penetration depth of the Berkovich indenter. The results were analyzed using the work-of-indentation model. Films with Y in the range of 65-70at% show maximum hardness of about 22GPa, value comparable to the measured for a bulk WC reference sample. Chemical composition and structure were determined using other techniques such as X-ray diffraction, scanning electron microscopy as well as Raman and Auger electron spectroscopies. (C) 2004 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Queretaro MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000224890100014 L2 - amorphous coatings;nanoindentation;hardness;chemical composition;HARDNESS; COATINGS SO - Vacuum 2004 ;76(2-3):173-176 11502 UI - 6456 AU - Macias JL AU - Capra L AU - Scott KM AU - Espindola JM AU - Garcia-Palomo A AU - Costa JE AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUS Geol Survey, Cascades Volcano Observat, Vancouver, WA 98683, USAUS Geol Survey, Cascades Volcano Observat, Vancouver, WA 98683, USAMacias, JL, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - The 26 May 1982 breakout flows derived from failure of a volcanic dam at El Chichon, Chiapas, Mexico AB - The eruptions of El Chichon between 28 March and 4 April 1982 produced a variety of pyroclastic deposits. The climactic phase, on 3 April at 07:35 (4 April at 01:35 GMT), destroyed the central andesitic dome and fed pyroclastic surges and flows that dammed nearby drainages, including the Magdalena River. By late April, a lake had formed, 4 km long and 300-400 m wide, containing a volume of 26 x 10(6) m(3) of hot water. At 01:30 on 26 May, the pyroclastic dam was breached and surges of sediment and hot water soon inundated the town of Ostuacan, 10 km downstream. This hot flood was finally contained at Penitas Hydroelectric Dam, 35 km downstream, where one fatality occurred and three workers were badly scalded. Stratigraphic and sedimentologic evidence indicates that the rapidly draining lake initially discharged two debris flows, followed by five smaller debris flows and water surges. The main debris flows became diluted with distance, and by the time they reached Ostuacan, they merged into a single hyperconcentrated flow with a sediment concentration of similar to30 vol%. Deposits from this hyperconcentrated flow were emplaced for 15 km, as far as the confluence with another river, the Mas-Pac, below which the flow was diluted to sediment-laden streamflow. The minimum volume of the breakout-flow deposits is estimated at 17 X 10(6) m(3). From high-water marks, flow profiles, and simulations utilizing the DAMBRK code from the National Weather Service, we calculated a maximum peak discharge of 11,000 m(3)/s at the breach; this maximum peak discharge occurred 1 h after initial breaching. The calculations indicated that similar to2 h were required to drain the lake MH - Mexico|Distrito Federal MH - USA PB - DENVER: ASSOC ENGINEERING GEOLOGISTS GEOLOGICAL SOCIETY AMER RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7606 UR - ISI:000188249100016 L2 - volcanic dam;breakout;debris flow;Chichon;Chiapas;Mexico;DEBRIS FLOW; ERUPTIONS; DEPOSITS; LAHAR SO - Geological Society of America Bulletin 2004 ;116(1-2):233-246 11503 UI - 3449 AU - Mackay WP AU - Maes JM AU - Fernandez PR AU - Luna G AD - Univ Texas, Dept Biol Sci, Centennial Museum, El Paso, TX 79968, USAMuseo Entomol, Leon, NicaraguaInst Ecol AC, Dept Biol Suelos, Xalapa, Veracruz, MexicoMackay, WP, Univ Texas, Dept Biol Sci, Centennial Museum, El Paso, TX 79968 USA TI - The ants of North and Central America: the genus Mycocepurus (Hymenoptera : Formicidae) AB - We provide a review of the North American ants (north of Colombia) of the ant genus Mycocepurus, including keys to the workers and females, illustrations and distribution maps. The distribution of M. tardus is extended to Nicaragua and Costa Rica. The female of M. curvispinosus is described MH - USA MH - Mexico|Veracruz MH - Nicaragua PB - TUCSON: UNIV ARIZONA RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 1536-2442 UR - ISI:000226161700014 L2 - fungus-growing ants;tribe Attini;tropical rain forest;Neotropics;FUNGUS-GROWING ANTS; TRIBE ATTINI; SYMBIOSIS SO - Journal of Insect Science 2004 ;4(): 11504 UI - 5641 AU - Mackey MC AU - Santillan M AU - Yildirim N AD - McGill Univ, Ctr Nonlinear Dynam, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Ctr Nonlinear Dynam, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaInst Politecn Nacl, Esc Sup Fis & Matemat, Mexico City 07738, DF, MexicoAtaturk Univ, Bilgisayar Bilimleri Uygulama Arastirma Merkezi, TR-25240 Erzurum, TurkeyMcGill Univ, Ctr Nonlinear Dynam, Dept Math, Montreal, PQ H3G 1Y6, CanadaMackey, MC, McGill Univ, Ctr Nonlinear Dynam, Dept Physiol, 3655 Drummond St, Montreal, PQ H3G 1Y6, Canada TI - Modeling operon dynamics: the tryptophan and lactose operons as paradigms AB - Understanding the regulation of gene control networks and their ensuing dynamics will be a critical component in the understanding of the mountain of genomic data being currently collected. This paper reviews recent mathematical modeling work on the tryptophan and lactose operons which are, respectively, the classical paradigms for repressible and inducible operons. (C) 2004 Published by Elsevier SAS on behalf of Academie des sciences MH - Canada MH - Mexico|Distrito Federal MH - Turkey PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Biology;Multidisciplinary Sciences U5 - J;Article AV - English IS - 1631-0691 UR - ISI:000221052000006 L2 - gene regulatory networks;nonlinear dynamics;computational molecular biology;SUGAR PHOSPHOTRANSFERASE SYSTEM; CELLULAR CONTROL PROCESSES; ESCHERICHIA-COLI; BETA-GALACTOSIDASE; POSITIVE-FEEDBACK; INDUCER EXCLUSION; 1 GENE; PHOSPHOENOLPYRUVATE; BIFURCATION; MATHEMATICS SO - Comptes Rendus Biologies 2004 ;327(3):211-224 11505 UI - 5624 AU - Maczka M AU - Hanuza J AU - Fuentes AF AU - Morioka Y AD - Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, PolandWroclaw Univ Econ, Fac Ind & Econ, Dept Bioorgan Chem, PL-53345 Wroclaw, PolandIPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoSaitama Univ, Fac Sci, Dept Chem, Urawa, Saitama 3388570, JapanMaczka, M, Polish Acad Sci, Inst Low Temp & Struct Res, POB 1410, PL-50950 Wroclaw 2, Poland TI - Vibrational studies of A(B ' B-2/3 '(1/3))O-3 perovskites (A = Ba, Sr; B ' = Y, Sm, Dy, Gd, In; B '' = Mo, W) AB - The Raman- and IR-active phonons were studied in ordered Ba(y(2/3)Mo(1/3))O-3, Ba(Y2/3W1/3)O-3, Ba(Gd2/3W1/3)O-3, Ba(Sm-2/3 W-1/3)O-3, Ba(Dy2/3W1/3)O-3, Ba(DY2/3Mo1/3)O-3 and Ba(In2/3W1/3)O-3 as well as disordered Ba(ln(2/3)Mo(1/3)) O-3 and Sr(In2/3W1/3)O-3. The assignment of the observed modes was given on the basis of lattice dynamical calculations. The studies performed revealed the presence of forbidden by the selection rules Raman bands for the Ba(In2/3Mo1/3)O-3 sample. This result suggests that the Ba(In2/3Mo1/3)O-3 contains 1: 1 ordered domains of Fm (3) over barm symmetry embedded in the disordered Pm (3) over barm matrix and that Ba(In2/3Mo1/3)O-3 and Ba(In2/3W1/3)O-3 may be obtained in both ordered and disordered structures, depending on the thermal treatment. This behaviour resembles that of well known Pb(In1/2Nb1/2)O-3, Pb(Sc1/2Nb1/2)O-3 and Pb(Sc1/2Ta1/2)O-3 relaxors MH - Japan MH - Mexico|Coahuila MH - Poland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000221037300015 L2 - COMPLEX PEROVSKITES; RAMAN-SPECTROSCOPY; PHASE-TRANSITIONS; OPTICAL PHONONS; SITE ORDER; FERROELECTRICS; SCATTERING; DYNAMICS; CERAMICS; SPECTRA SO - Journal of Physics-Condensed Matter 2004 ;16(13):2297-2310 11506 UI - 5735 AU - Madhavaraju J AU - Kolosov I AU - Buhlak D AU - rmstrong-Altrin JS AU - Ramasamy S AU - Mohan SP AD - Univ Madras, Dept Geol, Sch Earth & Atmospher Sci, Madras 600025, Tamil Nadu, IndiaNatl Acad Sci, Inst Geol Sci, Minsk 220141, ByelarusUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoMadhavaraju, J, Univ Madras, Dept Geol, Sch Earth & Atmospher Sci, Guindy Campus, Madras 600025, Tamil Nadu, India TI - Carbon and oxygen isotopic signatures in Albian-Danian limestones of Cauvery Basin, southeastern India AB - The Albian-Danian limestones of Cauvery Basin show a wide range of delta(13)C and 8 110 values (-13.2 to + 1.1parts per thousand and -9.0 to -2.5parts per thousand, respectively). The cement samples show negative carbon and oxygen isotope values (-18.9 to -3.9parts per thousand and -9.0 to -4.3parts per thousand, respectively). The petrographic study reveals the presence of algae, molluscs, bryozoans, foraminifers and ostracods as major framework constituents. The limestones have microspar and equant sparry calcite cements. The pore spaces and vugs are filled with sparry calcite cement. The bivariate plot of delta(13)C and delta(18)O suggests that most of the samples fall in the freshwater limestone and meteoric field, while few samples fall in the marine limestone and soil calcite fields. The presence of sparry calcite cement, together with negative carbon and oxygen isotope values, indicates that these limestones have undergone meteoric diagenesis MH - Byelarus MH - India MH - Mexico|Morelos PB - KOCHI: INT ASSOC GONDWANA RESEARCH RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1342-937X UR - ISI:000220792800019 L2 - C- and O-isotopes;limestone;diagenesis;Cauvery Basin;southeastern India;TAMIL-NADU; SOUTHERN INDIA; ARIYALUR GROUP; LATE MIOCENE; EAST-COAST; STRATIGRAPHY; DIAGENESIS; EVOLUTION; PALEOSOLS; OCEAN SO - Gondwana Research 2004 ;7(2):519-529 11507 UI - 5408 AU - Madriz X AU - Martinez MB AU - Rodriguez MA AU - Sierra G AU - Martinez-Lopez C AU - Riveron AM AU - Flores L AU - Orozco E AD - IPN, CINVESTAV, Dept Expt Pathol, Mexico City 07000, DF, MexicoIPN, Escuela Nacl Med & Homeopatia, Mexico City 07320, DF, MexicoInst Finlay, Div Mol Biol, Havana 11600, CubaCENIC, Dept Mol Biol, Havana 6690, CubaOrozco, E, IPN, CINVESTAV, Dept Expt Pathol, AP 14-740, Mexico City 07000, DF, Mexico TI - Expression in fibroblasts and in live animals of Entamoeba histolytica polypeptides EhCP112 and EhADH112 AB - EhCPADH is an immunogenic, heterodimeric protein that is formed by EhCP112 (cysteine protease) and EhADH112 (adhesin), polypeptides involved in Entamoeba histolytica's cytopathic effect, target-cell adherence and phagocytosis. The EhCPADH complex is located in the plasma membrane and cytoplasmic vacuoles. Here, the independent expression of EhCP112 and EhADH112 in fibroblasts and hamsters was analysed. Also investigated was the immunological response in animals independently inoculated with plasmid pcDNA-Ehcp112, which carries the complete cysteine protease-encoding gene, or with plasmid pcDNA-Ehadh112, which carries the C terminus of the adhesin-encoding gene, or with a mixture of both. Both proteins were expressed in the plasma membranes of the transfected fibroblasts. EhCP112 was toxic for the mammalian cells. Proteins were also independently expressed in hamsters after inoculation with the plasmids. Their expression was indirectly evaluated by the presence of antibodies in the inoculated animals. Remarkably, co-immunization of the animals with the two DNA plasmids resulted in an earlier and higher anti-E. histolytica IgG induction than immunization with separate plasmids. In contrast, the cellular immune response was not noticeably improved by the plasmid mixture. Interestingly, protection against liver abscesses was detected only in animals that received the plasmid mixture and no protection was observed in hamsters independently inoculated with plasmid pcDNA-Ehcp112 or pcDNA-Ehadh112 MH - Cuba MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000221538000023 L2 - ABSCESS FORMATION; BINDING LECTIN; PROTEIN; PROTECTION; GERBILS; IDENTIFICATION; IMMUNIZATION; ANTIGEN; VACCINE; LOCALIZATION SO - Microbiology-Sgm 2004 ;150():1251-1260 11508 UI - 6302 AU - Madsen V AU - Balsby TJS AU - Dabelsteen T AU - Osorno JL AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Copenhagen, Dept Anim Breeding, DK-2200 Copenhagen N, DenmarkMadsen, V, Univ Nacl Autonoma Mexico, Inst Ecol, Apartado Postal 70-275,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Bimodal signaling of a sexually selected trait: Gular pouch drumming in the Magnificent Frigatebird AB - Female Magnificent Frigatebirds (Fregata magnificens) search for mates while flying and by visiting males at their display sites. Males respond with an intense courtship display that includes making a characteristic drumming sound and presenting the inflated gular pouch, a likely sexually selected trait. Viewing angle, male posturing, and proximity might, however, limit females' ability to appraise pouch size exactly. We investigated whether drumming provides the same information about pouch size and indeed found fundamental frequencies to be negatively correlated with estimated pouch sizes. Probably, the gular pouch functions as a resonance chamber. Females' assessment of gular pouch size could therefore be enhanced by the combination of visual and auditory signals MH - Denmark MH - Mexico|Distrito Federal PB - LAWRENCE: COOPER ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Ornithology U5 - J;Article AV - English IS - 0010-5422 UR - ISI:000188861500016 L2 - courtship display;Fregata magnificens;Magnificent Frigatebird;secondary sexual trait;visual and acoustic signaling;SYRINGEAL MUSCLES; BEHAVIOR; SOUNDS; SIZE; BIRD SO - Condor 2004 ;106(1):156-160 11509 UI - 5512 AU - Magallon-Gastelum E AU - Lozano-Kasten F AU - Bossen MF AU - Cardenas-Contreras R AU - Ouaissi A AU - Breniere SF AD - Univ Guadalajara, Ctr Univ Ciencias Salud, Guadalajara, Jalisco, MexicoInst Rech Dev, UR 008, F-34032 Rennes, FranceMagallon-Gastelum, E, Univ Guadalajara, Ctr Univ Ciencias Salud, AP 2-136, Guadalajara, Jalisco, Mexico TI - Colonization of rock pile boundary walls in fields by sylvatic triatomines (Hemiptera : Reduviidae) in Jalisco State, Mexico AB - Granite rocks is a very abundant material in Mexico because they are used habitually as borders for fields. The current work established the significance of this ecotype as a colonization site for triatomines of the Phyllosoma complex. Seven sites, arbitrary selected, in San Martin de Hidalgo municipality (Mexico) were investigated in April 2002 by using 210 mouse bait-traps left during the night in wall hollows. One hundred and seventy-two triatomines of all life stages were collected from the seven sites. Triatomines adhered to the tape that covered the traps or were found near them, and 36.6% of the traps collected triatomines. The principal species was Triatonia longipennis Usinger (1939) and low numbers of Triatoma picturata Usinger (1939) were found. The nymphal population was very young, probably corresponding to the reproductive period in April (end of the dry season). The infection rate of the triatomines for Trypanosoma cruzi was 49%. Because collecting triatomines in the field is laborious and time-consuming, the mouse bait-trap method found to be practical to assess the population of triatomines within a sylvatic habitat MH - France MH - Mexico|Jalisco PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000221409200031 L2 - Triatoma;Phyllosoma complex;sylvatic ecotopes;rock piles;Mexico;TRYPANOSOMA-CRUZI KINETOPLASTIDA; CHAGAS-DISEASE; PHYLLOSOMA COMPLEX; VECTORS; TRANSMISSION; OAXACA SO - Journal of Medical Entomology 2004 ;41(3):484-488 11510 UI - 6662 AU - Magan R AU - Marin C AU - Rosales MJ AU - Barrera MA AU - Salas JM AU - Sanchez-Moreno M AD - Univ Granada, Fac Ciencias, Inst Biotechnol, Dept Parasitol, ES-18071 Granada, SpainUniv Granada, Fac Ciencias, Dept Quim Inorgan, ES-18071 Granada, SpainUniv Autonoma Yucatan, Ctr Invest Biol, Parasitol Lab, Merida, MexicoSanchez-Moreno, M, Univ Granada, Fac Ciencias, Inst Biotechnol, Dept Parasitol, C Severo Ochoa S-N, ES-18071 Granada, Spain TI - Activities of Pt(II) and Ru(III) triazole-pyrimidine complexes against Trypanosoma cruzi and T-brucei brucei AB - We studied the biological activity of three newly synthesized metal complexes of triazole-pyrimidine derivatives that were previously observed to inhibit in vitro growth of epimastigotes of Trypanosoma cruzi and procyclic forms of Trypanosoma brucei brucei. We analyzed the possible inhibitory effect of these compounds on the synthesis of DNA, RNA and protein, ultrastructure and excretion of metabolites by these parasites. RNA synthesis was inhibited by all three complexes assayed. These complexes also led to anomalies of the main organelles (e.g. nucleus, kinetoplast and mitochondria). In addition, these complexes may be capable of altering the excretion of metabolites by the parasites. Copyright (C) 2004 S. Karger AG, Basel MH - Mexico|Yucatan MH - Spain PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0031-7012 UR - ISI:000187396600005 L2 - chemotherapy;cytotoxicity;glycolytic metabolism;macromolecule synthesis;triazole-pyrimidine complexes;Trypanosoma brucei brucei;Trypanosoma cruzi;ultrastructural study;SESQUITERPENE LACTONES; LEISHMANIA-DONOVANI; PHYTOMONAS-STAHELI; DERIVATIVES; CYTOTOXICITY; METABOLISM; FORMS SO - Pharmacology 2004 ;70(2):83-90 11511 UI - 5930 AU - Magidin A AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoMagidin, A, Univ Montana, Dept Math Sci, Missoula, MT 59812, USA TI - Amalgams of nilpotent groups of class two AB - We give necessary and sufficient conditions for weak and strong embeddability of amalgams in each subvariety of N-2, the class of all nilpotent groups of class at most two; this generalizes B. Maier's result for N-2. We also discuss dominions, and characterize the weak, strong, and special amalgamation bases for each subvariety, contrasting the resulting classes with one another. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000220266500001 L2 - amalgam;nilpotent;weak embedding;strong embedding;dominion;special amalgam;amalgamation base;NIL-2 GROUPS; DOMINIONS SO - Journal of Algebra 2004 ;274(1):1-63 11512 UI - 6103 AU - Magnusson V AU - Johanneson B AU - Lima G AU - Odeberg J AU - arcon-Segivuam D AU - arcon-Riquelme ME AD - Univ Uppsala, Inst Genet & Pathol, Med Genet Sect, Dept Genet & Pathol, S-75185 Uppsala, SwedenInst Nacl Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoRoyal Inst Technol, SCFAB, Dept Biotechnol, Stockholm, SwedenAlarcon-Riquelme, ME, Univ Uppsala, Inst Genet & Pathol, Med Genet Sect, Dept Genet & Pathol, Dag Hammarskjolds Vag 20, S-75185 Uppsala, Sweden TI - Both risk alleles for Fc gamma RIIA and Fc gamma RIIIA are susceptibility factors for SLE: a unifying hypothesis AB - The aim of this study was to analyze in families with SLE for the presence of linkage and the structure and transmission of haplotypes containing alleles for the low-affinity Fcgamma receptors. The Fcgamma receptor polymorphisms FcgammaRIIA-131R/H, FcgammaRIIIA176F/ V and FcgammaRIIIB-NA1/2 and a polymorphism in the FcgammaRIIB gene were genotyped with RFLP, allele-specific PCR or pyrosequencing. Individual SNPs and haplotypes were tested for linkage in multicase families and for association using contingency tables, transmission disequilibrium test and affected family-based control groups in Swedish and Mexican single-case families. No linkage or association could be detected using the FcgammaR polymorphisms in the multicase families. However, an association was found for both FcgammaRIIA-131R and IIIA-176F alleles in the single-case families, but not for IIIB or IIB. Allelic association to SLE was found for a haplotype that included both risk alleles, but not in haplotypes where only one or the other was present. We propose that FcgammaRIIA-131R and FcgammaRIIIA-176F are both risk alleles for SLE transmitted primarily, but not exclusively on a single major haplotype that behaves functionally in a situation similar to that of compound heterozygozity MH - Mexico|Distrito Federal MH - Sweden PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 16 U4 - Genetics & Heredity;Immunology U5 - J;Article AV - English IS - 1466-4879 UR - ISI:000189363200007 L2 - Fc gamma receptor;SLE;polymorphisms;SYSTEMIC-LUPUS-ERYTHEMATOSUS; POLYMERASE-CHAIN-REACTION; LINKAGE ANALYSIS; GENETIC-LINKAGE; RECEPTOR-II; POLYMORPHISM; DISEASE; ASSOCIATION; BINDING; FREQUENCIES SO - Genes and Immunity 2004 ;5(2):130-137 11513 UI - 5981 AU - Mahalingam I AU - Chitra JSP AU - Chu JP AU - Sebastian PJ AD - Algappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, IndiaUNAM, Energy Res Ctr, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoNatl Taiwan Ocean Univ, Inst Mat Engn, Chilung 202, TaiwanMahalingam, I, Algappa Univ, Dept Phys, Karaikkudi 630003, Tamil Nadu, India TI - Preparation and microstructural studies of electrodeposited Cu2O thin films AB - Cuprous oxide (Cu2O) thin films have been synthesised potentiostatically on Cu and tin oxide-coated substrates at various bath temperatures. X-ray diffraction studies showed the deposition of single-phase cubic Cu2O film with improved crystallinity at the optimum deposition parameter conditions. X-ray line profile analyses are carried out on Cu2O films and microstructural parameters are evaluated. The variations of microstructural parameters with deposition and annealing conditions are studied. (C) 2004 Elsevier B.V All rights reserved MH - India MH - Mexico|Morelos MH - Taiwan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000220244900030 L2 - cuprous oxide thin films;potentiostatic deposition;crystal structure;microstructural parameters;annealing studies;electrical properties;CUPROUS-OXIDE FILMS; X-RAY-DIFFRACTION SO - Materials Letters 2004 ;58(11):1802-1807 11514 UI - 2978 AU - Mahler M AU - Kessenbrock K AU - Reeves W AU - Takasaki Y AU - de la Torre IG AU - Shoenfeld Y AU - Hiepe F AU - Shunle C AU - von Muhlen C AU - Wiik A AU - Hopfl P AU - Fritzler MJ AD - Dr Fooke Lab GmbH, Neuss, GermanyMax Planck Inst Neuroimmunol, Martinsried, GermanyUniv Florida, Gainesville, FL, USAJutendo Univ, Tokyo, JapanUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoSheba Med Ctr, Tel Aviv, IsraelHumboldt Univ, Charite, Berlin, GermanyShanghai Med Univ, Shanghai, Peoples R ChinaImmunol Metanal, Porto Alegre, RS, BrazilStatens Serum Inst, DK-2300 Copenhagen, DenmarkPharm Deutschland GmbH, Freiburg, GermanyUniv Calgary, Calgary, AB, Canada TI - Multi-centre evaluation of a new screening assay for the detection of ribosomal autoantibodies and identification of a HCV specific epitope MH - Brazil MH - Canada MH - Denmark MH - Germany MH - Israel MH - Japan MH - Mexico|Jalisco MH - Peoples R China MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000223799001653 SO - Arthritis and Rheumatism 2004 ;50(9):S599-S600 11515 UI - 4140 AU - Mahlknecht J AU - Schneider J AU - Merkel B AU - de Leon IN AU - Bernasconi S AD - Tech Univ Bergakad Freiberg, Dept Geol, D-09596 Freiberg, GermanyUniv Autonoma Nuevo Leon Ex Hacienda Guadalupe, Fac Ciencias Tierra, Linares 67700, Nuevo Leon, MexicoETH Zentrum, Inst Geol, CH-8092 Zurich, SwitzerlandAgr Univ Vienna, Inst Appl Geol, A-1190 Vienna, AustriaMahlknecht, J, Univ Guanajuato, Fac Ingn Geomat & Hidraul, Ave Juarez 77,Zona Ctr, Guanajuato 36000, Mexico TI - Groundwater recharge in a sedimentary basin in semi-arid Mexico AB - Recharge mechanisms and the hydrochemical evolution of groundwater in a semi-arid, 6,840-km(2), intermountain basin in central Mexico were investigated using stable isotopes and major chemical constituents. Ionic ratio analysis helped to conceptualize and quantify in part the subsequent geochemical evolution in the aquifer system. Mass balance models (PHREEQC) were used to interpret and rectify the geochemical properties of the aquifer. The recharge conditions have not changed noticeably during the last several thousands of years. The recharge mechanisms are accompanied by leaching of meteoric salts on and near the ground surface during major rain events, which previously accumulated after minor rain events. Rapid and diffuse infiltration can be excluded. Indirect infiltration from wadis (arroyos) and depressions (playas) with little mixing in shallow groundwater contrasts with a high degree of mixing for water with deep circulation. The prevailing source of major cations (Ca2+, Mg2+, Na+, K+) is weathering of carbonates and albite, followed by exchange reactions on clays and hydroxides. Ca2+/Na+ exchange may interchange along the flow path with reverse (Na+/Ca2+) exchange, although the Ca2+/Na+ option is prevalent. Meteoric Ca and Mg inputs are relatively small; however, meteoric Na is insignificant. Irrigation return flow plays an important role in the western part of the study area, giving rise to elevated sulfate and chloride concentrations MH - Austria MH - Germany MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary;Water Resources U5 - J;Article AV - English IS - 1431-2174 UR - ISI:000224617200004 L2 - semi-arid regions;groundwater recharge;stable isotopes;hydrochemistry;Mexico;SOUTH-AFRICA; PRECIPITATION; HYDROLOGY; PATTERNS; CHLORIDE; ISOTOPES; BALANCE; AQUIFER; VALLEY; WATERS SO - Hydrogeology Journal 2004 ;12(5):511-530 11516 UI - 3586 AU - Mahmood A AU - Sansores LE AU - Heiras J AD - SPS, Div Appl Phys, Islamabad, PakistanUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoMahmood, A, SPS, Div Appl Phys, PO Nilore, Islamabad, Pakistan TI - Bulk modulus calculations for group-IV carbides and group-III nitrides AB - Wide band gap semiconductors such as group-IV carbides (SiC, GeC) and group-III nitrides (AlN, GaN and BN) are known to be important materials for novel semiconductor applications. They also have interesting mechanical properties such as having a particularly high value for their bulk modulus and are therefore potential candidates for hard coatings. In this paper we report the theoretical calculations for the bulk modulus for zincblende and wurzite polytypes of these materials. The Density Functional and Total-energy Pseudopotential Techniques in the Generalized Gradient approximation, an ab initio quantum mechanical method, is used to obtain the theoretical structure, from which equilibrium lattice parameters and volume of the cell versus pressure may be extracted. The Murnaghan's equation of state is then used to calculate bulk modulus under elastic deformation, which is related to the hardness of a material under certain conditions. The results for bulk modulus are compared with other theoretical and experimental values reported in the literature MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Pakistan PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied;Physics, Condensed Matter;Physics, Mathematical U5 - J;Article AV - English IS - 0217-9849 UR - ISI:000225854000004 L2 - bulk modulus;group-IV carbides;group-III nitrides;hardness;GENERALIZED GRADIENT APPROXIMATION; LOCAL-DENSITY APPROXIMATION; ROCK-SALT PHASE; GALLIUM NITRIDE; ELECTRONIC-STRUCTURE; CORRELATION-ENERGY; ALUMINUM NITRIDE; EXCHANGE-ENERGY; HIGH-PRESSURE; STRUCTURAL-PROPERTIES SO - Modern Physics Letters B 2004 ;18(24):1247-1254 11517 UI - 4727 AU - Maiolino R AU - Oliva E AU - Ghinassi F AU - Pedani M AU - Mannucci F AU - Mujica R AU - Juarez Y AD - Osserv Astrofis Arcetri, INAF, I-50125 Florence, ItalyTelescopio Nazl Galileo, INAF, Santa Cruz De La Palma 38700, SpainIst Radioastron, Sez Firenze, I-50125 Florence, ItalyInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoMaiolino, R, Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy TI - Extreme gas properties in the most distant quasars AB - We present near-IR, low resolution spectra of eight of the most distant quasars known, with redshifts in the range 4.9 < z < 6.4. Half of these quasars are characterized by deep, broad and blueshifted absorption features associated with both high and low ionization species (CIV, SiIV, AlIII, MgII), i.e. they belong to the class of Broad Absorption Line (BAL) quasars, which are associated with powerful outflows of dense gas. Although the sample is small, the large fraction of BAL quasars, the depth and ionization state of the absorption features suggest that these most distant quasars are surrounded by a much larger amount of dense gas than lower redshift (z < 4) quasars. The possible interpretation in terms of extremely high accretion rates and the association with the early formation of quasars and of their host galaxies is discussed. The absorption properties of the dust, associated with the gas along the line of sight, appear different with respect to lower redshift quasars, possibly indicating different dust physics at these highest redshifts MH - Italy MH - Mexico|Puebla MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 22 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223249600013 L2 - galaxies : active;galaxies : evolution;galaxies : high-redshift;galaxies : quasars : absorption lines;galaxies : quasars : general;BROAD ABSORPTION-LINE; DIGITAL SKY SURVEY; EMISSION-LINE; REDSHIFT QUASARS; STELLAR OBJECTS; STAR-FORMATION; DUST; NUCLEI; QSOS; SPECTROSCOPY SO - Astronomy & Astrophysics 2004 ;420(3):889-897 11518 UI - 6068 AU - Maiz-Apellaniz J AU - Walborn NR AU - Galue HA AU - Wei LH AD - Space Telescope Sci Inst, Baltimore, MD 21218, USAInst Tecnol & Estudios Super Monterrey, Monterrey 64849, Nuevo Leon, MexicoCornell Univ, Dept Astron, Ithaca, NY 14853, USAMaiz-Apellaniz, J, European Space Agcy, ESTEC, Space Telescope Div, Noordwijk, Netherlands TI - A Galactic O star catalog AB - We have produced a catalog of 378 Galactic O stars with accurate spectral classifications that is complete for V<8 but includes many fainter stars. The catalog provides cross-identifications with other sources; coordinates (obtained in most cases from Tycho-2 data); astrometric distances for 24 of the nearest stars; optical (Tycho-2, Johnson, and Stromgren) and NIR photometry; group membership, runaway character, and multiplicity information; and a Web-based version with links to on-line services MH - Mexico|Nuevo Leon MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 39 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000220118100005 L2 - binaries : general;catalogs;open clusters and associations : general;stars : distances;stars : early-type;stars : fundamental parameters;INITIAL MASS FUNCTION; NORTHERN MILKY-WAY; SPECTRAL CLASSIFICATIONS; STELLAR CONTENT; TRIGONOMETRIC PARALLAXES; SOLAR NEIGHBORHOOD; SPACE DISTRIBUTION; TYCHO-2 CATALOG; DIGITAL ATLAS; RUNAWAY STARS SO - Astrophysical Journal Supplement Series 2004 ;151(1):103-148 11519 UI - 4165 AU - Makagonov P AU - Alexandrov M AU - Gelbukh A AD - Natl Polytech Inst, Ctr Computing Res, Mexico City 07738, DF, Mexico. Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Clustering abstracts instead of full texts AB - Accessibility of digital libraries and other web-based repositories has caused the illusion of accessibility of the full texts of scientific papers. However, in the majority of cases such an access (at least free access) is limited only to abstracts having no more then 50-100 words. Traditional keyword-based approach for clustering this type of documents gives unstable and imprecise results. We show that they can be easy improved with more adequate keyword selection and document similarity evaluation. We suggest simple procedures for this. We evaluate our approach on the data from two international conferences. One of our conclusions is the suggestion for the digital libraries and other repositories to provide document images of full texts of the papers along with their abstracts for open access via Internet MH - Mexico|Distrito Federal MH - South Korea T3 - TEXTLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlempp2003@inbox.ru dyner@cic.ipn.mx gelbukh@gelbukh.com2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAX16 AV - English IS - 0302-9743 UR - ISI:000224026300017 SO - 2004 ;():129-135 11520 UI - 4183 AU - Maldonado-Mercado C AD - Univ Glasgow, Dept Math, Glasgow G12 8QW, Lanark, ScotlandITESM CEM, Mexico City 52926, DF, MexicoMaldonado-Mercado, C, Univ Glasgow, Dept Math, Univ Gardens, Glasgow G12 8QW, Lanark, Scotland TI - Deformation quantization in singular spaces AB - We present a method of quantizing analytic spaces X immersed in an arbitrary smooth ambient manifold M. Remarkably our approach can be applied to singular spaces. We begin by quantizing the cotangent bundle of the manifold M. Using a supermanifold framework we modify the Fedosov construction in a way such that the star-product of the functions lifted from the base manifold turns out to be the usual commutative product of smooth functions on M. This condition allows us to lift the ideals associated to the analytic spaces on the base manifold to form left (or right) ideals on (O-Omega1M[[(h) over bar]],star(h)) in a way independent of the choice of generators and leading to a finite set of PDEs defining the functions in the quantum algebra associated with X. Some examples are included. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - United Kingdom PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000224456600016 L2 - QUANTUM-MECHANICS SO - Journal of Mathematical Physics 2004 ;45(10):3983-3994 11521 UI - 4794 AU - Maldonado-Santoya M AU - Cesteros LC AU - Katime I AU - Nuno-Donlucas SM AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Pais Vasco, Fac Ciencias, Dept Quim Fis, Grp Nuevos Mat & Espectroscopia Supramol, Bilbao 48990, SpainUniv Guadalajara, Dept Quim, Guadalajara 44430, Jalisco, MexicoNuno-Donlucas, SM, Univ Guadalajara, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Miscible blends of poly(vinyl phenyl ketone hydrogenated) and poly(styrene-co-4-vinylpyridine) AB - Miscibility behavior over a wide composition range was detected for polymer blends of poly(vinyl phenyl ketone hydrogenated) (PVPhKH) with poly(styrene-co-4-vinylpyridine) (PS-co-4VPy). Differential scanning calorimetry (DSC) and thermo mechanical analysis (TMA) reveal that each composition has only one glass transition temperature. The variation of the glass transition temperature with composition for PVPhKH/PS-co-4VPy miscible blends follows the Gordon-Taylor equation. FTIR analysis of this binary system indicates the existence of hydrogen bonding between pyridine ring of PS-co-4VPy and hydroxyl groups insert into PVPhKH. This specific interaction has a decisive influence in the phase behavior of PVPhKH/PS-co-4VPy blends. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Jalisco MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000222927700025 L2 - poly(vinyl phenyl ketone hydrogenated);poly(styrene-co-4-vinylpyfidine);miscible polymer blends;GLASS-TRANSITION TEMPERATURES; VINYL ALCOHOL) BLENDS; MISCIBILITY BEHAVIOR; PHASE-BEHAVIOR; COPOLYMERS; POLY(2-ETHYL-2-OXAZOLINE) SO - Polymer 2004 ;45(16):5591-5596 11522 UI - 6327 AU - Maldonado-Santoyo M AU - Ortiz-Estrada C AU - Luna-Barcenas G AU - Sanchez IC AU - Cesteros LC AU - Katime I AU - Nuno-Donlucas SM AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Iberoamer, Dept Ingn & Ciencias Quim, Mexico City 01210, DF, MexicoCINVESTAV, Unidad Queretaro, Queretaro 76230, Qro, MexicoUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Pais Vasco, Fac Ciencias, Dept Quim Fis, Grp Nuevos Mat, Bilbao 48990, SpainNuno-Donlucas, SM, Univ Guadalajara, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Miscibility behavior and hydrogen bonding in blends of poly(vinyl phenyl ketone hydrogenated) and poly(2-ethyl-2-oxazoline) AB - The miscibility behavior of poly(2-ethyl-2-oxazoline) (PEOx)/poly(vinyl phenyl ketone hydrogenated) (PVPhKH) blends was studied for the entire range of compositions. Differential scanning calorimetry and thermomechanical analysis measurements showed that all the PEOx/PVPhKH blends studied had a single glass-transition temperature (T-g). The natural tendency of PVPhKH to self-associate through hydrogen bonding was modified by the presence of PEOx. Partial IR spectra of these blends suggested that amide groups in PEOx and hydroxyl groups in PVPhKH interacted through hydrogen bonding. This physical interaction had a positive influence on the phase behavior of PEOx/PVPhKH blends. The Kwei equation for T-g as a function of the blend composition was satisfactorily used to describe the experimental data. Pure-component pressure-volume-temperature data were also reported for both PEOx and PVPhKH. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Queretaro MH - Spain MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Polymer Science U5 - J;Article AV - English IS - 0887-6266 UR - ISI:000188591700007 L2 - interactions;pressure-volume-temperature properties;glass transition;infrared spectroscopy;miscibility;CO-VINYL ALCOHOL); GLASS-TRANSITION TEMPERATURES; COMPATIBLE POLYMER BLENDS; MIXTURES; POLY(N,N-DIMETHYLACRYLAMIDE); COPOLYMERS; COMPLEXES; POLY(ETHYLOXAZOLINE) SO - Journal of Polymer Science Part B-Polymer Physics 2004 ;42(4):636-645 11523 UI - 6561 AU - Maldonado-Santoyo M AU - Nuno-Donlucas SM AU - Cesteros LC AU - Katime I AD - Univ Guadalajara, Dept Quim, Guadalajara 44430, Jalisco, MexicoUniv Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Pais Vasco, Fac Ciencias, Dept Quim Fis, Grp Neuvos Mat, Bilbao 48990, SpainNuno-Donlucas, SM, Univ Guadalajara, Dept Quim, Blvd M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Miscibility and specific interactions in blends of poly(vinyl phenyl ketone hydrogenated) with poly(2,6-dimethyl-1,4-phenylene oxide) AB - The miscibility behavior of poly(vinyl phenyl ketone hydrogenated) (PVPhKH) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) are studied by differential scanning calorimetry, thermomechanical analysis, and FTIR spectroscopy. Two miscibility windows between 10 to 40 and 60 to 90 wt % PPO are detected. Only the blend with 50 wt % PPO is immiscible. The best fit of the Gordon-Taylor equation of the experimental glass-transition temperatures for miscible PVPhKH/PPO blends is shown. A study by FTIR spectroscopy suggests that hydrogen bonding interactions are formed between the hydroxyl groups of PVPhKH and the ether groups of PPO. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Jalisco MH - Spain PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000187712400064 L2 - poly(vinyl phenyl ketone hydrogenated);poly(2,6-dimethyl-1,4-phenylene oxide);specific interactions;hydrogen bonding;miscibility blend;CO-VINYL ALCOHOL); POLYETHYLENE BLENDS; POLYMERS; COPOLYMERS; DENSITY; POLY(N,N-DIMETHYLACRYLAMIDE); POLY(2-ETHYL-2-OXAZOLINE); POLY(ETHYLOXAZOLINE); VINYLPYRROLIDONE; COMPATIBILITY SO - Journal of Applied Polymer Science 2004 ;91(3):1887-1892 11524 UI - 5209 AU - Maldonado-Siman E AU - Bermudez-Villanueva L AU - Cadena-Meneses J AU - Sumano-Lopez H AU - Kunz SE AD - Univ Autonoma Chapingo, Dept Zootecn, Chapingo 56235, MexicoUniv Autonoma Chapingo, Dept Parasitol, Chapingo 56235, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Farmacol, Mexico City, DF, MexicoUSDA ARS, US Livestock Insects Lab, Kerrville, TX 78029, USAMaldonado-Siman, E, Univ Autonoma Chapingo, Dept Zootecn, Chapingo 56235, Mexico TI - Seasonal fluctuation of Haematobia irritans (Diptera : Muscidae) on beef cattle in Tuxpan, Veracruz, Mexico MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal MH - USA PB - HATFIELD: ENTOMOLOGICAL SOC SOUTHERN AFRICA RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 1021-3589 UR - ISI:000222117200015 L2 - MANAGEMENT SO - African Entomology 2004 ;12(1):125-129 11525 UI - 5671 AU - Malijevsky A AU - Pizio O AU - Patrykiejew A AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoPrague Inst Chem Technol, CR-16628 Prague, Czech RepublicMarie Curie Sklodowska Univ, Dept Modelling Phys Chem Proc, PL-20031 Lublin, PolandPizio, O, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Coyoacan, Mexico City 04510, DF, Mexico TI - Phase behavior of symmetric binary mixtures with partially miscible components in spherical pores. Density functional approach AB - We investigate adsorption in spherical pores of model symmetric binary mixtures exhibiting demixing in bulk phase, by using a density functional approach. Our focus is on the evaluation of the Upper part of the coexistence envelope for the first-order phase transitions in adsorbed fluids, and the lines separating mixed and demixed phases. We show that the scenario for phase transitions is sensitive to the pore radius. This parameter can change the type of the phase diagram for the confined fluid comparing to its bulk counterpart. In particular, for not very big spherical pores and for strong wall-fluid interactions, the capillary condensation between mixed phases is strongly depressed, such that only condensation from mixed gas to demixed liquid phase terminating at tricritical point is observed. (C) 2003 Elsevier B.V. All rights reserved MH - Czech Republic MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0167-7322 UR - ISI:000221002800011 L2 - adsorption of mixtures;spherical cavities;phase transitions;demixing;SLIT-LIKE PORES; MIXED MULTILAYER ADSORPTION; MONTE-CARLO-SIMULATION; LENNARD-JONES MIXTURES; FLUID MIXTURE; SHAPED PORES; TRANSITIONS; EQUILIBRIA; CARBON; MODEL SO - Journal of Molecular Liquids 2004 ;112(1-2):81-89 11526 UI - 3401 AU - Malina RM AU - Reyes MEP AU - Tan SK AU - Buschang PH AU - Little BB AU - Koziel S AD - Tarleton State Univ, Stephenville, TX, USAMichigan State Univ, Ctr Latin Amer & Caribbean Studies, E Lansing, MI, USAEscuela Nacl Antropol & Hist, Mexico City, DF, MexicoDSO Natl Labs, Def Med & Environm Res Inst, Singapore, SingaporeTexas A&M Univ, Syst Hlth Sci Ctr, Dallas, TX, USAPolish Acad Sci, Inst Anthropol, Wroclaw, PolandMalina, RM, Route 2 Box 140, Bay City, TX 77414, USA TI - Secular change in height, sitting height and leg length in rural Oaxaca, southern Mexico: 1968-2000 AB - Objective: To evaluate secular changes in height, sitting height and estimated leg length between 1968 and 2000 in residents in a rural Zapotec-speaking community in Oaxaca, southern Mexico. Materials and methods: Height and sitting height were measured in school children 6-13 years (1968, 1978, 2000), in adolescents 13-17 years (1978, 2002) and adults 19-29 years (1978, 2000). Leg length was estimated as height minus sitting height. The sitting height/ height ratio was calculated. Subjects were grouped by sex into four age categories: 6-9, 10-13, 13-17 and 19-29 years for analysis. The Preece-Baines Model I growth curve was fitted to cross-sectional means for 1978 and 2000. Results: There were no differences between children 6-9 and 10-13 years in 1968 and 1978 with the exception of the sitting height ratio in girls 6-9 years. Children of both sexes 6-13 years and adolescent boys 13-17 years were significantly larger in the three dimensions in 2000 compared to 1978; adolescent girls differed only in height and sitting height. Adult males in 2000 were significantly taller with longer legs than those in 1978, but the samples did not differ in sitting height and the ratio. Adult females in 1978 and 2000 did not differ significantly in the three dimensions. Rates of secular change in height and sitting height between 1978 and 2000 were reasonably similar in the three age groups of male children and adolescents, but the rate for estimated leg length was highest in 10-13-year-old boys. Secular gains were smaller in adult males, but were proportionally greater in estimated leg length. Girls 6-9 and 10-13 years experienced greater secular gains in height, sitting height and estimated leg length than adolescent and young adult females, while secular gains and rates decreased from adolescent girls to young adult women. Ages of peak velocity for height, sitting height and estimated leg length declined in boys, while only ages of peak velocity for height and estimated leg length declined in girls. Conclusions: There are major secular increases in height, sitting height and estimated leg length of children and adolescents of both sexes since 1978. Secular gains in height are of similar, magnitude in boys and girls 6-13 years, but are greater in adolescent and young adult males than females. The secular increase in height of young adults of both sexes is smaller than that among adolescents. Estimated leg length accounts for about 60% of the secular increase in height in children of both sexes. Estimated leg length and sitting height contribute equally to the secular increase in height in adolescent boys, whereas estimated leg length accounts for about 70% of the secular increase in height in young adult males. Sitting height contributes about two-thirds of the secular increase in height in adolescent and young adult females MH - Mexico|Distrito Federal MH - Poland MH - Singapore MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 11 U4 - Biology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0301-4460 UR - ISI:000226373100001 L2 - ZAPOTEC-SPEAKING COMMUNITY; GROWTH STATUS; BODY PROPORTIONS; SCHOOL-CHILDREN; VALLEY; JAPANESE; STATURE; AGE; TREND; MAYA SO - Annals of Human Biology 2004 ;31(6):615-633 11527 UI - 3402 AU - Malina RM AU - Reyes MEP AU - Tan SK AU - Little BB AD - Tarleton State Univ, Stephenville, TX, USAMichigan State Univ, Ctr Latin Amer & Caribbean Studies, E Lansing, MI, USAEscuela Nacl Antropol & Hist, Mexico City, DF, MexicoDSO Natl Labs, Def Med & Environm Res Inst, Singapore, SingaporeMalina, RM, Route 2 Box 140, Bay City, TX 77414, USA TI - Secular change in age at menarche in rural Oaxaca, southern Mexico: 1968-2000 AB - Objective: To evaluate secular change in the age at menarche between 1978 and 2000 in residents of a rural Zapotec-speaking community in Oaxaca, southern Mexico, using status quo and retrospective methods. Materials and methods: Status quo menarcheal status of girls 9-18 years of age in 1978 (n = 101) and 2000 (n = 238) and retrospective ages at menarche of adult women 19+ years of age in 1978 (n = 228) and 2000 (n = 246) were obtained via interview. Probit analysis was used to estimate median ages at menarche and 95% confidence intervals (CI) for the status quo data. Analysis of variance and linear regression was used to compare the retrospective data across surveys. Results: The median ages at menarche of adolescents are 14.8 +/- 1.2 years (0.24 year, 95% CI 14.2-15.4 years) in 1978 and 13.0 +/- 1.0 years (0.10 year, 95% CI 12.7-13.3 years) in 2000. Age at menarche has declined by 1.8 years over about 23 years, 0.78 year/decade (95% CI = 0.65-0.91 year/decade). Recalled ages at menarche do not differ by age group in the 1978 survey, but differ significantly by age group in the 2000 survey (p < 0.001). Within the 2000 survey, the two youngest age groups ( < 29, 30-39 years) do not differ, but attain menarche earlier than women in the four older age groups (p < 0.05), who do not differ from each other in age at menarche. The estimated rates of secular decline in age at menarche in adult women vary between 0.38 and 0.42 years/decade (0.26-0.56 year/decade). Conclusions: There is a major secular decline in the age at menarche of adolescent girls and young adult women between 1978 and 2000. The estimated rate of decline in adult women is about one-half of that in adolescent girls. The secular decline in age at menarche is consistent with corresponding secular gains height, sitting height and estimated leg length of children and adolescents in the community; corresponding secular gains are smaller in young adults 19-29 years MH - Mexico|Distrito Federal MH - Singapore MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 5 U4 - Biology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0301-4460 UR - ISI:000226373100002 L2 - GROWTH STATUS; SCHOOL-CHILDREN; RECALLED AGE; BODY-SIZE; ACCURACY; VALLEY; TREND; MATURATION; COMMUNITY; STATURE SO - Annals of Human Biology 2004 ;31(6):634-646 11528 UI - 4431 AU - Malpica R AU - Franco B AU - Rodriguez C AU - Kwon O AU - Georgellis D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoKorea Res Inst Biosci & Biotechnol, Lab Metab Engn, Taejon 305333, South KoreaGeorgellis, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, Mexico TI - Identification of a quinone-sensitive redox switch in the ArcB sensor kinase AB - Escherichia coli senses and signals anoxic or low redox conditions in its growth environment by the Arc two-component system. Under anaerobic conditions, the ArcB sensor kinase autophosphorylates and transphosphorylates ArcA, a global transcriptional regulator that controls the expression of numerous operons involved in respiratory or fermentative metabolism. Under aerobic conditions, the kinase activity of ArcB is inhibited by the quinone electron carriers that act as direct negative signals. Here, we show that the molecular mechanism of kinase silencing involves the oxidation of two cytosol-located redox-active cysteine residues that participate in intermolecular disulfide bond formation, a reaction in which the quinones provide the source of oxidative power. Thus, a pivotal link in the Arc signal transduction pathway connecting the redox state of the quinone pool to the transcriptional apparatus is elucidated MH - Mexico|Distrito Federal MH - South Korea PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 43 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000223799100041 L2 - SIGNAL-TRANSDUCTION SYSTEM; ESCHERICHIA-COLI; 2-COMPONENT SYSTEM; GENOME SEQUENCE; DISULFIDE BOND; ENDOPLASMIC-RETICULUM; REGULATOR PROTEIN; SULFENIC ACID; IN-VITRO; GENE SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(36):13318-13323 11529 UI - 3923 AU - Malvezzi M AU - Bosetti C AU - Chatenoud L AU - Rodriguez T AU - Levi F AU - Negri E AU - La Vecchia C AD - Mario Negri Inst Pharmacol Res, Lab Epidemiol, I-20157 Milan, ItalyUniv Publ Navarra, Dept Ciencias Salud, Pamplona, SpainUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi, MexicoInst Univ Med Sociale & Prevent, Registre Vaudois Tumeurs, CH-1005 Lausanne, SwitzerlandUniv Milan, Ist Stat Med & Biometria, I-20122 Milan, ItalyBosetti, C, Mario Negri Inst Pharmacol Res, Lab Epidemiol, Via Eritrea 62, I-20157 Milan, Italy TI - Trends in cancer mortality in Mexico, 1970-1999 AB - Background: Few data on cancer mortality have been published for Mexico over the last few decades. It is therefore of interest to conduct a systematic and updated analysis of cancer mortality in this country. Patients and methods: Age-standardised (world population) mortality rates, at all ages and truncated at age 35-64 years, from major cancers and all cancers combined were computed on the basis of certified deaths derived from the World Health Organization database for the period 1970-99. Results: Mortality rates for all neoplasms showed an upward trend in men of all ages (from 58.2/100000 in 1970-74 to 87.1/100000 in 1995-99) and in middle-aged men (from 76.1 to 93.7/100000, respectively). This reflects the rise until the early 1990s in lung cancer mortality (from 8.1/100000 in 1970-74 to 15.6/100000 in 1995-99) and prostate cancer (from 5.5 to 12.2/100000, respectively). In women, overall mortality rates showed an increase between the early 1970s (75.4/100000) and the late 1990s (82.3/100000). Total cancer mortality rates remained low, however, compared with other American countries (e.g. 153.3/100000 men and 108.6/100000 women in 1999 in the United States). Truncated rates were stable (126.5/100000 in 1970-74 and 125.8/100000 in 1995-99), although they were much higher than overall rates, reflecting exceedingly high rates for uterine (mostly cervical) cancer mortality in middle-aged women (29.5/100000 in 1995-99). Conclusions: Total cancer mortality in Mexico has remained comparably low on a worldwide scale, and the upward trends in mortality rates for lung and other tobacco-related neoplasms have tended to level off over the last decade. However, steady rises have been observed for other major cancers, including prostate and breast. Cervical cancer remains a major health problem in women MH - Italy MH - Mexico|San Luis Potosi MH - Spain MH - Switzerland PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Oncology U5 - J;Article AV - English IS - 0923-7534 UR - ISI:000225170300021 L2 - Mexico;mortality;neoplasms;GASTRIC-CANCER; BREAST-CANCER; EPIDEMIOLOGIC PANORAMA; COLORECTAL-CANCER; UNITED-STATES; EUROPE; AMERICA; PREVENTION; POPULATION; PATTERNS SO - Annals of Oncology 2004 ;15(11):1712-1718 11530 UI - 4624 AU - Mancera L AU - Rodriguez JA AU - Takeuchi N AD - Univ Nacl Colombia, Dept Fis, Bogota, ColombiaUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoMancera, L, Univ Nacl Colombia, Dept Fis, Bogota, Colombia TI - Theoretical study of the stability of wurtzite, zinc-blende, NaCl and CsCl phases in group IIIB and IIIA nitrides AB - The relative stability of wurtzite, zinc-blende, rock-salt and CsCl structures and the possibility of high-pressure phase transformations from wurtzite to rocksalt and from rocksalt to CsCl is of special interest. We present a comparative study of the stability of these phases for two Group IIIB-nitrides (ScN, YN) and two Group IIIA-nitrides (GaN, InN), in the framework of DFT. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Colombia MH - Mexico|Baja California PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000223394700035 L2 - GENERALIZED GRADIENT APPROXIMATION; ELECTRONIC-STRUCTURE; HIGH-PRESSURE; V NITRIDES; SCN; GAN; INN SO - Physica Status Solidi B-Basic Solid State Physics 2004 ;241(10):2424-2428 11531 UI - 4830 AU - Manea VC AU - Manea M AU - Kostoglodov V AU - Currie CA AU - Sewell G AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Victoria, Sch Earth & Ocean Sci, Victoria, BC, CanadaGeol Survey Canada, Pacific Geosci Ctr, Sidney, BC V8L 4B2, CanadaUniv Texas, El Paso, TX 79968, USAManea, VC, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Thermal structure, coupling and metamorphism in the Mexican subduction zone beneath Guerrero AB - Temperature is one of the most important factors that controls the extent and location of the seismogenic coupled and transition, partially coupled segments of the subduction interplate fault. The width of the coupled fault inferred from the continuous GPS observations for the steady interseismic period and the transient width of the last slow aseismic slip event (M-w similar to 7.5) that occurred in the Guerrero subduction zone in 2001-2002 extends up to 180-220 km from the trench. Previous thermal models do not consider this extremely wide coupled interface in Guerrero subduction zone that is characterized by shallow subhorizontal plate contact. In this study, a finite element model is applied to examine the temperature constraints on the width of the coupled area. The numerical scheme solves a system of 2-D Stokes equation and 2-D steady-state heat transfer equations. The updip limit of the coupling zone is taken between 100 and 150 degreesC, while the downdip limit is accepted at 450 degreesC as the transition from partial coupling to stable sliding. From the entire coupled zone, the seismogenic zone extends only up to 82 km from the trench (inferred from the rupture width of large subduction thrust earthquakes), corresponding to the 250 degreesC isotherm. Only a small amount of frictional heating is needed to fit the intersection of the 450 degreesC isotherm and the subducting plate surface at 180-205 km from the trench. The calculated geotherms in the subducting slab and the phase diagram for MORB are used to estimate the metamorphic sequences within the oceanic subducting crust. A certain correlation exists between the metamorphic sequences and the variation of the coupling along the interplate fault MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000222963300028 L2 - coupling;flat subduction;Mexican subduction zone;thermal models;HEAT-FLOW; SOUTHERN MEXICO; FRICTIONAL SLIP; SEISMIC GAP; EARTHQUAKE; SOUTHWEST; MANTLE; PLATE; DEPTH; JAPAN SO - Geophysical Journal International 2004 ;158(2):775-784 11532 UI - 3556 AU - Manko VS AU - Ruiz E AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Salamanca, Area Fis Teor, Salamanca 37008, SpainManko, VS, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - How can exact and approximate solutions of Einstein's field equations be compared? AB - The problem of comparison of the stationary axisymmetric vacuum solutions obtained within the framework of exact and approximate approaches for the description of the same general relativistic systems is considered. We suggest two ways of carrying out such comparison: (i) through the calculation of the Ernst complex potential associated with the approximate solution whose form on the symmetry axis is subsequently used for the identification of the exact solution possessing the same multipole structure, and (ii) the generation of approximate solutions from exact ones by expanding the latter in series of powers of small parameters. The central result of our paper is the derivation of the correct approximate analogues of the double-Kerr solution possessing the physically meaningful equilibrium configurations. We also show that the interpretation of an approximate solution originally attributed to it on the basis of some general physical suppositions may not coincide with its true nature established with the aid of a more accurate technique MH - Mexico|Distrito Federal MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000226015500012 L2 - KINNERSLEY-CHITRE TRANSFORMATIONS; EXTENDED MULTISOLITON SOLUTIONS; DOUBLE-KERR SOLUTION; GENERAL-RELATIVITY; GRAVITATIONAL FIELD; EQUILIBRIUM STATES; MULTIPOLE MOMENTS; MAXWELL-EQUATIONS; MASS; SYMMETRIES SO - Classical and Quantum Gravity 2004 ;21(24):5849-5869 11533 UI - 4864 AU - Manoharan PK AU - Gopalswamy N AU - Yashiro S AU - Lara A AU - Michalek G AU - Howard RA AD - Catholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20017, USATata Inst Fundamental Res, Radio Astron Ctr, Ooty, Udhagamandalam, IndiaNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoJagiellonian Univ, Astron Observ, Krakow, PolandUSN, Div Space Sci, Res Lab, Washington, DC 20375, USAManoharan, PK, Catholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20017 USA TI - Influence of coronal mass ejection interaction on propagation of interplanetary shocks AB - We studied 91 interplanetary (IP) shocks associated with coronal mass ejections (CMEs) originating within about +/-30degrees in longitude and latitude from the center of the Sun during 1997-2002. These CMEs cover a wide range of initial speeds of about 120 to 2400 kms(-1) and they also include a special population of 25 interacting CMEs. This study provides the characteristics of propagation effects of more number of high-speed CMEs (V-CME > 1500 kms(-1)) than the data used in earlier studies. It enables to extend the shock-arrival prediction model to high-speed CMEs. The results on comparison of IP shock speed and transit time at 1 AU suggest that the shock transit time is not controlled by its final speed but is primarily determined by the initial speed of the CME and effects encountered by it during the propagation. It is found that the CME interaction tends to slow the shock and associated CME. The deviations of shock arrival times from the empirical model are considerably large for slow (V-CME < 300 kms(-1)) and fast (V-CME > 800 kms(-1)) CMEs. Results show that the slow and fast CMEs experience stronger effective acceleration MH - USA MH - India MH - Mexico|Distrito Federal MH - Poland PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 26 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000222778000003 L2 - shock waves;interplanetary shocks;coronal mass ejections;EARTH; STORMS; SPEED; EVENT; WIND; 1-AU SO - Journal of Geophysical Research-Space Physics 2004 ;109(A6): 11534 UI - 4373 AU - Manoutcharian K AU - Acero G AU - Munguia ME AU - Becerril B AU - Massieu L AU - Govezensky T AU - Ortiz E AU - Marks JD AU - Cao C AU - Ugen K AU - Gevorkian G AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoUNAM, Inst Biotechnol, Mexico City, DF, MexicoUNAM, Inst Fisiol Celular, Mexico City, DF, MexicoUniv Calif San Francisco, San Francisco Gen Hosp, Dept Anesthesia & Pharmaceut Chem, San Francisco, CA 94110, USAUniv S Florida, Coll Med, Dept Med Microbiol & Immunol, Tampa, FL 33612, USAGevorkian, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Apartado Postal 70228,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Human single chain Fv antibodies and a complementarity determining region-derived peptide binding to amyloid-beta 1-42 AB - A library of phage-displayed human single-chain Fv (scFv) antibodies was selected against the human amyloid-beta peptide (Abeta42). Two new anti-Abeta42 phage-displayed scFvs antibodies were obtained, and the sequences of their V-H and VK genes were analyzed. A synthetic peptide based on the sequence of Ig heavy chain (V-H) complementarity-determining region (HCDR3) of the clone with the highest recognition signal was generated and determined to bind to Abeta42 in ELISA. Furthermore, we showed for the first time that an HCDR3-based peptide had neuroprotective potential against Abeta42 neurotoxicity in rat cultured hippocampal neurons. Our results suggest that not only scFvs recognizing Abeta42 but also synthetic peptides based on the V-H CDR3 sequences of these antibodies may be novel potential candidates for small molecule-based Alzheimer's disease (AD) therapy. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences U5 - J;Article AV - English IS - 0969-9961 UR - ISI:000223944200013 L2 - Alzheimer's disease;single-chain Fv (scFv) antibodies;A beta 42;AMYLOID-BETA-PEPTIDE; AUTOIMMUNE THROMBOCYTOPENIC PURPURA; CENTRAL-NERVOUS-SYSTEM; DISEASE-LIKE PATHOLOGY; ALZHEIMERS-DISEASE; IN-VITRO; HIPPOCAMPAL-NEURONS; MOUSE MODEL; MEMORY LOSS; PROTEIN SO - Neurobiology of Disease 2004 ;17(1):114-121 11535 UI - 1824 AU - Mansur JL AU - Mapeli A AU - Etchegoyen G AU - De Santiago S AU - Gonzalez H AD - Ctr Endocrinol & Osteoporosis, La Plata, ArgentinaHosp Ninos Sor M Ludovicaosis, IDIP, La Plata, ArgentinaUniv Iberoamer, Dept Hlth, Mexico City, DF, Mexico TI - Changes in bone mineral density and body composition in lactating adolescents MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000224326801563 SO - Journal of Bone and Mineral Research 2004 ;19():S299-S299 11536 UI - 5232 AU - Mansurova S AU - Stepanov S AU - Camacho-Pernas V AU - Ramos-Garcia R AU - Gallego-Gomez F AU - Mecher E AU - Meerholz K AD - INAOE, Puebla 72000, MexicoInst Phys Chem, D-50939 Cologne, GermanyMansurova, S, INAOE, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - Measurements of deviation from Einstein relation in PVK-based photorefractive polymers by photoelectromotive-force technique AB - Non-steady-state photoelectromotive-force effect is proposed for experimental measurements of deviation from Einstein relation in amorphous monopolar photoconductors. For widely used poly(N-vinylcarbazole)-based polymer films this technique yielded an approximately three-fold difference between the measured diffusion coefficient-to-mobility ratio (D/mu) and its conventional value in crystalline photoconductors (approximate to78 vs 25 mV). The mobility, lifetime, and diffusion coefficient of the photoholes were evaluated in these experiments as approximate to7.9x10(-8) cm(2)/Vs, approximate to10 ms, and approximate to5.6x10(-9) cm(2)/s, respectively MH - Germany MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000221961700008 L2 - PHOTOCARRIER GRATING TECHNIQUE; CHARGE-CARRIERS; DIFFUSION; TRANSPORT; DRIFT SO - Physical Review B 2004 ;69(19): 11537 UI - 5091 AU - Manzanares-Martinez B AU - Sanchez-Dehesa J AU - Hakansson A AU - Cervera F AU - Ramos-Mendieta F AD - Univ Politecn Valencia, Ctr Tecnol Nanofoton, E-46022 Valencia, SpainUniv Politecn Valencia, Dept Ingn Elect, E-46022 Valencia, SpainUniv Politecn Valencia, ETSI Telecommun, Dept Fis Aplicada, E-46022 Valencia, SpainUniv Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoSanchez-Dehesa, J, Univ Politecn Valencia, Ctr Tecnol Nanofoton, C Camino de Vera S-N, E-46022 Valencia, Spain TI - Experimental evidence of omnidirectional elastic bandgap in finite one-dimensional phononic systems AB - We present an experimental demonstration of the occurence of omnidirectional reflection in a finite multilayer of two elastic materials. This property is demonstrated in three different samples consisting of a few periods of Pb/Epoxy. The effect is fullfiled thanks to the large mismatch between the elastic parameters of the two materials in the multilayer. The thicknesses of the layers were chosen in order to have the omnidirectional gap at a few hundreds of kHz. The theoretical treatment of the phononic band structure of the corresponding superlattice as well as the transmission properties through the finite structures are in good agreement with the transmission measurements. (C) 2004 American Institute of Physics MH - Mexico|Sonora MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000222360300052 L2 - TRANSMISSION; REFLECTION SO - Applied Physics Letters 2004 ;85(1):154-156 11538 UI - 3812 AU - Maravilla P AU - Thompson RCA AU - Palacios-Ruiz JA AU - Estcourt A AU - Ramirez-Solis E AU - Mondragon-de-la-Pena C AU - Moreno-Moller M AU - Cardenas-Mejia A AU - Mata-Miranda P AU - guirre-Alcantara MT AU - Bonilla-Rodriguez C AU - Flisser A AD - Hosp Gen Dr Manuel Gea Gonzalez, SSA, Mexico City 14000, DF, MexicoMurdoch Univ, Sch Vet & Biomed Sci, Western Australian Biomed Res Inst, Murdoch, WA 6150, AustraliaMurdoch Univ, Sch Vet & Biomed Sci, World Hlth Org Collaborating Ctr Mol Epidemiol Pa, Murdoch, WA 6150, AustraliaUniv Autonoma Zacatecas, Ctr Biol Expt, Zacatecas, MexicoInst Diagnost & Referencia Epidemiol, SSA, Mexico City, DF, MexicoFlisser, A, Hosp Gen Dr Manuel Gea Gonzalez, SSA, Calzada Tlalpan 4800,Col Toriello Guerra, Mexico City 14000, DF, Mexico TI - Echinococcus granulosus cattle strain identification in an autochthonous case of cystic echinococcosis in central Mexico AB - Echinococcosis is a frequent hepatic parasitic disease in several countries but it is practically absent in Mexico. A cattle strain of Echinococcus granulosus was identified by RAPD, PCR-RFLP and mitochondrial CO1 gene analysis in an autochthonous case. The parasite was obtained after a laparoscopic excision of a liver cyst from a patient that was symptomatic for 6 years but mis-diagnosed before hospitalization. (C) 2004 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Zacatecas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0001-706X UR - ISI:000225319600010 L2 - Echinococcus granulosus;epidemiology;echinococcosis in humans;cattle strain molecular characterization;Mexico;GENUS ECHINOCOCCUS; GENETIC-ANALYSIS; POLYMORPHIC DNA; HUMANS; POLAND; HOSTS SO - Acta Tropica 2004 ;92(3):231-236 11539 UI - 4628 AU - Marchenko SV AU - Moffat AFJ AU - Crowther PA AU - Chene AN AU - De Serres M AU - Eenens PRJ AU - Hill GM AU - Moran J AU - Morel T AD - Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42101, USAUniv Montreal, Dept Phys, Montreal, PQ H3C 3J7, CanadaObserv Astron Mt Megantic, Montreal, PQ, CanadaUniv Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, EnglandMcGill Univ, Dept Phys, Montreal, PQ H3A 2T8, CanadaUniv Liege, Inst Astrophys, B-4000 Liege, Sart Tilman, BelgiumUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoWM Keck Observ, Kamuela, HI 96743, USAUniv N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599, USAIst Nazl Astrofis, Osservatorio Astron Palermo GS Vaiana, I-90134 Palermo, ItalyMarchenko, SV, Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42101 USA TI - Hydrogen in the atmosphere of the evolved WN3 Wolf-Rayet star WR 3: defying an evolutionary paradigm? AB - WR 3 is the brightest very early-type WN star in the sky. Based on several years of time-resolved spectroscopy and precision photometry on various time-scales, we deduce that WR 3 is most likely a single, weak-lined star of type WN3ha (contrary to its current catalogue-type of WN3 + O4), with H lines occurring both in emission and absorption in its wind. This conclusion is confirmed and strengthened via detailed modelling of the spectrum of WR 3. Given the similarity of WR 3 with numerous H-rich WNE stars in the Large Magellanic Cloud and especially the Small Magellanic Cloud, and its location towards the metal-deficient exterior of the Galaxy, we conclude that rotationally induced meridional circulation probably led to the apparently unusual formation of this hot Galactic WN star with enhanced hydrogen. Although we cannot completely rule out the possibility of a binary with a low orbital inclination and/or long period, we regard this latter possibility as highly unlikely MH - Belgium MH - Canada MH - United Kingdom MH - Italy MH - USA MH - Mexico|Guanajuato PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000223404500017 L2 - stars : abundances;stars : individual : WR 3;stars : Wolf-Rayet;TIME-SERIES ANALYSIS; LUMINOUS OB STARS; FUNDAMENTAL PARAMETERS; SPECTRAL-ANALYSIS; ABSORPTION-LINES; VARIABILITY; PHOTOMETRY; MODELS; INHOMOGENEITIES; CLASSIFICATION SO - Monthly Notices of the Royal Astronomical Society 2004 ;353(1):153-161 11540 UI - 5448 AU - Marchi MC AU - Castaneda-Guzman R AU - Perez-Pacheco A AU - Bilmes SA AU - Villagran-Muniz M AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, INQUIMAE, DQIAQF, RA-1428 Buenos Aires, DF, ArgentinaUNAM, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Photophys Lab, Mexico City 04510, DF, MexicoCastaneda-Guzman, R, Univ Buenos Aires, Fac Ciencias Exactas & Nat, INQUIMAE, DQIAQF, Ciudad Univ,Pabellon 2, RA-1428 Buenos Aires, DF, Argentina TI - Photoacoustic analysis of the evolution from sols to aged gels: Comparison of different initial titania sols AB - The use of correlation analysis of photoacoustic signal changes during the sol-gel-aging evolution of titania sols prepared from the hydrolysis of titanium n-butoxide in alcoholic, aqueous, and micellar media which provide different initial conditions and different evolution pathways is proposed. The photoacoustic experiments were done either at constant temperature for monitoring the initial evolution of the system, or under heating at 2degreesC . min(-1) for monitoring molecular processes related to drying, sintering, and crystallization. Results obtained from photoacoustic measurements display higher sensibility when compared with those from differential thermal analysis (DTA) and thermogravimetric analysis (TGA). The evolution of these systems shows instabilities below and above gelation, as well as during thermal treatment. These stabilities are minimized when the thermal treatment is performed on gels aged several months, and can be associated to molecular rearrangements or oscillating chemical reactions. For all the systems studied, the sensitivity of the correlation analysis recovered from photoacoustic signals permits detection of a transition in the 100 to 150degreesC range MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000221530400017 L2 - correlation analysis;oscillating reactions;phase transition;photoacoustic;sol-gel;TiO2;PHASE-TRANSITION SO - International Journal of Thermophysics 2004 ;25(2):491-502 11541 UI - 4323 AU - Marcos ED AU - Mendoza O AU - Saenz C AD - UNAM, Inst Matemat, Mexico City 04510, DF, MexicoUniv Sao Paulo, Dept Matemat, BR-05315970 Sao Paulo, SP, BrazilUNAM, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoMendoza, O, UNAM, Inst Matemat, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Stratifying systems via relative simple modules AB - In this paper we continue the study of stratifying systems, which were introduced by K. Erdmann and C. Saenz in [Comm. Algebra 31 (7) (2003) 3429-3446]. We show that this new concept provides a categorical generalization of the A-modules for a standardly stratified algebra. (C) 2004 Elsevier Inc. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000224037300005 L2 - ALGEBRAS SO - Journal of Algebra 2004 ;280(2):472-487 11542 UI - 5797 AU - Maret S AU - Ceccarelli C AU - Caux E AU - Tielens AGGM AU - Jorgensen JK AU - van Dishoeck E AU - Bacmann A AU - Castets A AU - Lefloch B AU - Loinard L AU - Parise B AU - Schoier FL AD - UPS, CNRS, CESR, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 04, FranceObserv Grenoble, Astrophys Lab, F-38041 Grenoble, FranceUniv Groningen, Space Res Org Netherlands, NL-9700 AV Groningen, NetherlandsLeiden Observ, NL-2300 RA Leiden, NetherlandsEuropean So Observ, D-85748 Garching, GermanyObserv Bordeaux, F-33270 Floirac, FranceUniv Nacl Autonoma Mexico, Inst Astron, Morelia 58089, Michoacan, MexicoMaret, S, UPS, CNRS, CESR, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 04, France TI - The H2CO abundance in the inner warm regions of low mass protostellar envelopes AB - We present a survey of the formaldehyde emission in a sample of eight Class 0 protostars obtained with the IRAM and JCMT millimeter telescopes. The range of energies of the observed transitions allows us to probe the physical and chemical conditions across the protostellar envelopes. The data have been analyzed with three different: methods with increasing level of sophistication. We first analyze the observed emission in the LTE approximation, and derive rotational temperatures between 11 and 40 K, and column densities between 1 and 20 x 10(13) cm(-2). Second, we use a LVG code and derive higher kinetic temperatures, between 30 and 90 K, consistent with subthermally populated levels and densities from 1 to 6 x 10(5) cm(-3). The column densities from the LVG modeling are within a factor of 10 with respect to those derived in the LTE approximation. Finally, we analyze the observations based upon detailed models for the envelopes surrounding the protostars, using temperature and density profiles previously derived from continuum observations. We approximate the formaldehyde abundance across the envelope with a jump function, the jump occurring when the dust temperature reaches 100 K, the evaporation temperature of the grain mantles. The observed formaldehyde emission is well reproduced only if there is a jump of more than two orders of magnitude, in four sources. In the remaining four sources the data are consistent with a formaldehyde abundance jump, but the evidence is more marginal (less than or equal to2 sigma). The inferred inner H2CO abundance varies between 1 x 10(-8) and 6 x 10(-6). The absolute values of the jump in the H2CO abundance are uncertain by about one order of magnitude, because of the uncertainties in the density, ortho to para ratio, temperature and velocity profiles of the inner region, as well as the evaporation temperature of the ices. We discuss the implications of these jumps for our understanding of the origin and evolution of ices in low mass star forming regions. Finally, we give predictions for the submillimeter H2CO lines, which are particularly sensitive to the abundance jumps MH - France MH - Germany MH - Mexico|Michoacan MH - Netherlands PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 36 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000220783200016 L2 - ISM : abundances;ISM : molecules;stars : formation;ISM : general;DENSE MOLECULAR CLOUDS; STAR-FORMING REGIONS; IRAS 16293-2422; HOT CORE; INFRARED OBSERVATIONS; DEUTERATED METHANOL; PHYSICAL STRUCTURE; CHEMICAL-STRUCTURE; NGC-1333 IRAS-4; GRAIN MANTLES SO - Astronomy & Astrophysics 2004 ;416(2):577-594 11543 UI - 4618 AU - Margarita Macias-Gomez N AU - Megarbane A AU - Leal-Ugarte E AU - Rodriguez-Rojas LX AU - Barros-Nunez P AD - IMSS, CIBO, Div Genet, Guadalajara 44340, Jalisco, MexicoSt Josephs Univ, Unite Genet Med, Lab Biol Mol & Cytogenet, Fac Med, Paris, FranceBarros-Nunez, P, IMSS, CIBO, Div Genet, Sierra Mojada 800 Col Independencia, Guadalajara 44340, Jalisco, Mexico TI - Diastrophic dysplasia and atelosteogenesis type II as expression of compound heterozygosis: First report of a Mexican patient and genotype-phenotype correlation AB - The osteochondrodysplasias represent a heterogeneous group of cartilage and bone diseases. Among these, achondrogenesis 113, atelosteogenesis type II, diastrophic dysplasia, and autosomal recessive multiple epiphyseal dysplasia are caused by mutations in the solute carrier family 26 (sulfate transporter), member 2 gene (SLC26A2). This group of osteochondrodysplasias shows a continuous spectrum of clinical variability and shares many features in common. Usually, it is difficult to distinguish clinically among these patients. To date, several efforts have been made to correlate mutations in the SLC26A2 gene with phenotypic severity in the patients. We report on a Mexican girl with diastrophic dysplasia presenting some unusual clinical and radiographic features that are usually observed in atelosteogenesis type II. Molecular analysis of the SLC26A2 gene in this patient showed compound heterozygosity for the R178X and R279W mutations. In this patient, the combination of a mild and a severe mutation has apparently led to an intermediate or transitional clinical picture, showing an apparent genotype-phenotype correlation. (C) 2004 Wiley-Liss, Inc MH - France MH - Mexico|Jalisco PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0148-7299 UR - ISI:000223478900017 L2 - diastrophic dysplasia;atelosteogenesis type II;SLC26A2;genotype-phenotype correlation;osteochondrodysplasias;ACHONDROGENESIS TYPE IB; TRANSPORTER DTDST GENE; SULFATE TRANSPORTER; MUTATIONS; DWARFISM SO - American Journal of Medical Genetics Part A 2004 ;129A(2):190-192 11544 UI - 3977 AU - Margolis RL AU - Holmes SE AU - Rosenblatt A AU - Gourley L AU - O'Hearn E AU - Ross CA AU - Seltzer WK AU - Walker RH AU - Ashizawa T AU - Rasmussen A AU - Hayden M AU - Almqvist EW AU - Harris J AU - Fahn S AU - MacDonald ME AU - Mysore J AU - Shimohata T AU - Tsuji S AU - Potter N AU - Nakaso K AU - Adachi Y AU - Nakashima K AU - Bird T AU - Krause A AU - Greenstein P AD - Johns Hopkins Univ, Sch Med, Program Cellular & Mol Med, Dept Psychiat, Baltimore, MD 21218, USAJohns Hopkins Univ, Sch Med, Program Cellular & Mol Med, Dept Neurol, Baltimore, MD 21218, USAJohns Hopkins Univ, Sch Med, Dept Neurosci, Baltimore, MD 21218, USAAthena Diagnost Inc, Worcester, MA, USAVet Affairs Med Ctr, Dept Neurol, Bronx, NY, USACUNY Mt Sinai Sch Med, New York, NY 10029, USAUniv Texas, Dept Neurol, Galveston, TX 77555, USAInst Nacl Neurol & Neurocirug, Dept Neurogenet & Mol Biol, Mexico City, DF, MexicoUniv British Columbia, Ctr Mol Med & Therapeut, Vancouver, BC V5Z 1M9, CanadaColumbia Univ, Dept Neurol, New York, NY 10027, USAMassachusetts Gen Hosp, Mol Neurogenet Unit, Boston, MA 02114, USANiigata Univ, Brain Res Inst, Dept Neurol, Niigata 951, JapanUniv Tokyo, Dept Neurol, Tokyo, JapanMargolis, RL, Meyer 2-181,600 N Wolfe St, Baltimore, MD 21287, USA TI - Huntington's disease-like 2 (HDL2) in North America and Japan AB - Huntington's Disease-like 2 (HDL2) is a progressive, autosomal dominant, neurodegenerative disorder with marked clinical and pathological similarities to Huntington's disease (HD). The causal mutation is a CTG/CAG expansion mutation on chromosome 16q24.3, in a variably spliced exon of junctophilin-3. The frequency of HDL2 was determined in nine independent series of patients referred for HD testing or selected for the presence of an HD-like phenotype in North America or Japan. The repeat length, ancestry, and age of onset of all North American HDL2 cases were determined. The results show that HDL2 is very rare, with a frequency of 0 to 15% among patients in the nine case series with an HD-like presentation who do not have the HD mutation. HDL2 is predominantly, and perhaps exclusively, found in individuals of African ancestry. Repeat expansions ranged from 44 to 57 triplets, with length instability in maternal transmission detected in a repeat of 33 triplets. A younger age of onset is correlated with a longer repeat length (r(2) = 0.29, p = 0.0098). The results further support the evidence that the repeat expansion at the chromosome 16q24.3 locus is the direct cause of HDL2 and provide preliminary guidelines for the genetic testing of patients with an HD-like phenotype MH - Canada MH - Japan MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 14 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0364-5134 UR - ISI:000224969300009 L2 - DISEASE-LIKE 2; CAG/CTG REPEAT EXPANSIONS; HUNTINGTONS-DISEASE; CHOREA-ACANTHOCYTOSIS; JUNCTOPHILIN-3; FEATURES; LOCUS; GENE SO - Annals of Neurology 2004 ;56(5):670-674 11545 UI - 5813 AU - Mariano A AU - Lerma PP AD - Natl Univ La Plata, Fac Ciencias Exactas, Dept Fis, RA-1900 La Plata, ArgentinaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMariano, A, Natl Univ La Plata, Fac Ciencias Exactas, Dept Fis, CC 67, RA-1900 La Plata, Argentina TI - New Fermi smearing approach for scattering of multi-GeV electrons by nuclei AB - The cross section for electron scattering by nuclei at high momentum transfers is calculated within the Fermi smearing approximation, where binding effects on the struck nucleon are introduced via the relativistic Hartree approximation. The model naturally preserves current conservation, since the response tensor for an off-shell nucleon conserves the same form as for a free one but with an effective mass. Different parametrizations for the inelastic nucleon structure function are analyzed. The smearing at the Fermi surface is introduced through a momentum distribution obtained from a perturbative nuclear matter calculation. Recent CEBAF data on inclusive scattering of 4.05 GeV electrons on Fe-56 are well reproduced for all measured geometries for the first time, as is evident from the comparison with previous calculations MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000220607200074 L2 - SPECTRAL-FUNCTION; MOMENTUM-TRANSFER; MATTER; E,E'; TARGETS SO - Physical Review C 2004 ;69(3): 11546 UI - 4684 AU - Marin-Almazo M AU - Garcia-Gutierrez D AU - Gao X AU - Elechiguerra JL AU - Kusuma VA AU - Sampson WM AU - Miki-Yoshida M AU - Dalton AB AU - Escudero R AU - Jose-Yacaman M AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Texas Mat Inst, Austin, TX 78712, USAInst Nacl Invest Nucl, Ocoyoacac 52045, Edo Mexico, MexicoUniv Autonoma Estado Mexico, Fac Quim, Toluca 50120, Edo Mexico, MexicoCtr Invest Mat Avanzados Miguel de Cervantes, Chihuahua 31109, Chih, MexicoUniv Texas, Nano Tech Inst, Richardson, TX 75083, USANatl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoJose-Yacaman, M, Univ Texas, Dept Chem Engn, 1 Univ Stn C0400, Austin, TX 78712 USA TI - Cobalt-based superparamagnetic nanorings AB - Remarkable optical and magnetic properties were observed in a Co-thiol-polymer composite. The Co and the thiol ligand used to passivate the Co surface, instead of generating isolated nanoparticles, grow into nanorings with a radius around 2 nm. These structures consist of small clusters of metallic Co connected by alkylthiol chains. These small nanorings self-assemble into larger nanorings of similar to10 nm, which in turn self-assemble into larger nanorings in the range of 100-1000 nm in size. We formed a composite by embedding the nanorings in a polymeric matrix. The resulting material presented interesting optical properties such as absorption and emission in the visible zone of the electromagnetic spectrum, and a strong nonlinear optical behavior. The absorption and emission are mainly due to the presence of an alkylthiol-cobalt complex; and the nonlinear optical behavior is due to the presence of the Co clusters inside the polymer matrix. These composites exhibit a superparamagnetic effect down to 250 K, and below this temperature presented features very similar to those observed in spin-glass-like systems. In the nanorings a remarkable phenomenon is that, in addition to the superparamagnetic behavior, we found that during measurements with an applied external field they act as giant aromatic macromolecules and a current circulates through them. The evidence of a current circulating through the nanorings in the presence of an external field tells us about the possibility to use these structures in the design of nanosystems. Our work opens new possibilities of using magnetic transition metals to fabricate nanostructured magnetooptical materials MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000223292800001 L2 - GOLD NANOPARTICLES; CHEMISTRY SO - Nano Letters 2004 ;4(8):1365-1371 11547 UI - 3719 AU - Marin-Hernandez A AU - Devy M AU - vina-Cervantes G AD - Univ Veracruzana, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, Mexico. CNRS, LAAS, F-31077 Toulouse 04, France TI - Color active contours for tracking roads in natural environments AB - Scene interpretation and feature tracking in natural environments are very complex perceptual functions. Complexity lies on several factors, for example: the lack of control on illumination conditions and the presence of different textures in the environment. This paper presents a real-time method to track roads in natural environments. The scene is previously characterized and classified in different regions by a combined ICA and color segmentation method (not described in this paper). This method is not so fast to track desired features in real time. The region tracking is executed on color active contours. New color potential fields are proposed: a) one to attract active contours depending on the selected region color, and b) the second one to repulse active contours when it is inside the region. Two potential fields are defined from the results of the initial characterization process and are updated by the same process at a given constant frequency, to avoid errors mainly due to global changes in illumination conditions or to local changes on the characteristics of the selected region. This approach has been evaluated on image sequences, acquired in natural environments MH - France MH - Mexico|Veracruz T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleanmarin@uv.mx michel@laas.fr gavina@laas.fr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBE01 AV - English IS - 0302-9743 UR - ISI:000225085900015 SO - 2004 ;():124-131 11548 UI - 5172 AU - Marin I AU - Lucas JI AU - Gradilla AC AU - Ferrus A AD - Univ Valencia, Dept Genet, E-46100 Valencia, SpainCSIC, Inst Cajal, E-28002 Madrid, SpainUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoMarin, I, Univ Valencia, Dept Genet, Calle Doctor Moliner 50, E-46100 Valencia, Spain TI - Parkin and relatives: the RBR family of ubiquitin ligases AB - Mutations in the parkin gene cause autosomal-recessive juvenile parkinsonism. Parkin encodes a ubiquitin-protein ligase characterized by having the RBR domain, composed of two RING fingers plus an IBR/DRIL domain. The RBR family is defined as the group of genes whose products contain an RBR domain. RBR family members exist in all eukaryotic species for which significant sequence data is available, including animals, plants, fungi, and several protists. The integration of comparative genomics with structural and functional data allows us to conclude that RBR proteins have multiple roles, not only in protein quality control mechanisms, but also as indirect regulators of transcription. A recently formulated hypothesis, based on a case of gene fusion, suggested that RBR proteins may be often part of cullin-containing ubiquitin ligase complexes. Recent data on Parkin protein agrees with that hypothesis. We discuss the involvement of RBR proteins in several neurodegenerative diseases and cancer MH - Mexico|Jalisco MH - Spain PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Cell Biology;Genetics & Heredity;Physiology U5 - J;Review AV - English IS - 1094-8341 UR - ISI:000222088900001 L2 - Parkinson disease;protein quality control;transcriptional regulation;RING-FINGER PROTEINS; AMYOTROPHIC-LATERAL-SCLEROSIS; RECESSIVE JUVENILE PARKINSONISM; RNA SYNTHETASE COMPLEX; DISEASE GENE-PRODUCT; ALPHA-SYNUCLEIN; CONJUGATING ENZYMES; INTERACTING PROTEIN; ANDROGEN RECEPTOR; CELL-DEATH SO - Physiological Genomics 2004 ;17(3):253-263 11549 UI - 4632 AU - Marinkovic ZV AU - Milosevic O AU - Nikolic MV AU - Kakazey MG AU - Karpec MV AU - Tomila TV AU - Ristic MM AD - Univ Belgrade, Ctr Multidisciplinary Studies, Belgrade, YugoslaviaSASA, Inst Tech Sci, Belgrade, YugoslaviaUniv Estado Morelas, Ctr Invest Ingn & Ciencias Aplicadas, Cuernavaca, MexicoNatl Acad Sci Ukraine, Inst Problems Mat Sci, Kiev, UkraineSerbian Acad Arts & Sci, Belgrade, YugoslaviaMarinkovic, ZV, Univ Belgrade, Ctr Multidisciplinary Studies, Belgrade, Yugoslavia TI - Evolution of the microstructure of disperse ZnO powders obtained by the freeze-drying method AB - Freeze-drying, as a cryochemical powder processing method is applied in the synthesis of ZnO submicrometer to narrosized powders. The process involves rapid freezing of the sprayed precursor solution, drying under vacuum by sublimation of the Solvent and salt decomposition to oxide by thermal treatment. Calcination of dehydrated Zn(NO3)(2) was performed through destruction of the primary crystal structure, i.e. through accumulation of different defect complexes and based on this, the formation of a new state of the ZnO crystal lattice. An analysis of the microstructure evolution of zinc oxide particles in the temperature range from 548 to 898 K is described. The research was performed using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), electronic paramagnetic resonance (EPR) and infrared spectroscopy (IR). It was shown that the least ("primary") coherent scattering region (580 Angstrom) and the most defective state were ZnO obtained at the lowest calcination temperature (T-c = 548 K). Increase of the calcination temperature (T-c > 548 K) favors uniting of eight closest "primary" domains into "secondary" ones. Unification is accompanied by a pronounced increase in microstrainin "secondary" domains, whose size practically does not depend on the calcination temperature in the region 573-898 K. (C) 2003 Published by Elsevier B.V MH - Mexico|Morelos MH - Ukraine MH - Yugoslavia PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000223329700115 L2 - zinc oxide;powder;freeze-drying;microstructure SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;375-77():620-624 11550 UI - 3715 AU - Mariscal-Landin G AU - Avellaneda JH AU - de Souza TCR AU - Aguilera A AU - Borbolla GA AU - Mar B AD - CENI Fisiol, Queretaro 76001, MexicoUniv Tecn Estatal Quevedo, Fac Ciencias Pecuarias, Quevedo, EcuadorUniv Autonoma Queretaro, Fac Ciencias Nat, Queretaro, MexicoUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Mexico City, DF, MexicoCEBETA, Mexico City, DF, MexicoMariscal-Landin, G, CENI Fisiol, AP 1-1168, Queretaro 76001, Mexico TI - Effect of tannins in sorghum on amino acid ileal digestibility and on trypsin (EC2.4.21.4) and chymotrypsin (EC2.4.21.1) activity of growing pigs AB - Two experiments were conducted to evaluate the effect of tannin levels in sorghum on coefficient of apparent ileal digestibility (CAID), coefficient of standardised ileal digestibility (CSID) of amino acids, and total and specific activity (TA, SA) of trypsin and chymotrypsin of growing pigs. In the first experiment, 24 castrates (60:L 5 kg) were fitted with a simple T cannula to evaluate four different sorghum samples (I, II, III, and IV) with different tannin levels (1.4, 4.6, 9.8 and 10.0 g kg(-1)). At the end of the trial, pigs were slaughtered to obtain samples of pancreas and intestinal digesta. Data were analysed as a randomized block design. The highest CAID (P < 0.05) was observed on sorghum I and the lowest on sorghum II. Leucine and glutamic acid were the most digestible amino acids in the four samples of sorghum, with glycine, lysine, threonine and cysteine being the least digestible. As tannin levels increased, proline CAID decreased (P<0.05). CSID of amino acids in sorghum I was higher (P<0.05) than on sorghum II, except for proline. Similarly, the CSID for isoleucine, lysine, threonine, valine, alanine and aspartic acid was similar among sorghums I, III and IV. Tannin content did not affect pancreas weight, protein content, or TA and SA of trypsin and chymotrypsin on pancreatic tissue. However, in the digesta of duodenum, trypsin TA was increased (P < 0.05) by 6.7% in the two treatments with the highest tannin content. In the second experiment, 32 castrates (53 +/- 7 kg) were fitted with a simple T cannula to evaluate eight different hybrids of sorghum: four Pioneer (8172, 8428, 8443, and 8641), and four Dekalb (D-45, D-65, D-68, and D-69). High-tannin sorghums (8172 and 8428) had the lowest (P<0.05) CAID for arginine, glycine, and proline. Furthermore, sorghum 8428 had the lowest (P<0.05) CAID for lysine (0.339). The CAID for proline was negative (-0.110) for sorghum 8428 and extremely low (0.031) in sorghum 8172. These sorghums had a low (P < 0.05) CSID for arginine, histidine, and proline. In sorghums with a high content of tannins the CSID for proline and glycine was very low. Lysine CSID was lower (P<0.05) in sorghum 8428, when compared to the others samples of sorghums. In conclusion, tannin levels up to 1.05% are not the main depressors of the CAID and CSID of amino acids in the sorghum grain; however, tannins have a clear negative effect on CAID and CSID in sorghum with high levels (4% or more) of tannin. (C) 2004 Elsevier B.V. All rights reserved MH - Ecuador MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0377-8401 UR - ISI:000225558800006 L2 - tannins;sorghum;amino acids;real digestibility;pigs;DIETARY-PROTEIN SOURCES; VICIA-FABA L; CONDENSED TANNINS; DIGESTIVE ENZYMES; APPARENT ILEAL; ILEORECTAL ANASTOMOSIS; FECAL DIGESTIBILITY; NUTRITIONAL-VALUE; SMALL-INTESTINE; FIELD BEANS SO - Animal Feed Science and Technology 2004 ;117(3-4):245-264 11551 UI - 6405 AU - Markaida U AU - Quinonez-Velazquez C AU - Sosa-Nishizaki O AD - CICESE, Dept Ecol, Baja California, MexicoCICIMAR, Dept Pesquerias & Biol Marina, IPN, Baja California Sur, MexicoSosa-Nishizaki, O, CICESE, Ecol Marina, POB 434844, San Diego, CA 92143 USA TI - Age, growth and maturation of jumbo squid Dosidicus gigas (Cephalopoda : Ommastrephidae) from the Gulf of California, Mexico AB - This study describes the age and growth of large specimens of the jumbo squid Dosidicus gigas that supported the fishery in the Gulf of California in 1995-1997. Statoliths of 299 females (10.8-87.5 cut mantle length, ML) and 147 males (17-73.9 cm ML) were read. Assuming a daily rhythm of statolith deposition the smallest female (10.8 cm ML) was 84 days old and the largest (87.5 cm ML) 386 days old. The oldest females were 14-15 months old. The smallest male (17 cm ML) was 135 days old and the oldest male (71.5 cm ML) was 372 days old. The logistic model best described growth in jumbo squid. Growth curves were similar to those reported from other studies on this species using statolith reading. However, they suggest a faster growth than that described by size frequency analysis. No differences in growth were noted between seasons, except that females from Sta. Rosalia weighed more than those caught off Guaymas at the same age. Females grew faster than males, but both sexes grew more than 2 mm/day between 140th and 300th day of life: one of the highest absolute growth rates recorded so far for squids. Large size females mature late, at an age of 1 year and 73 cm ML and males matured at 10 months and 60 cm ML. Females of the medium-sized maturing group mature at 7 months and 37 cm ML and males at 7 months and 34 cm. Thus, this latter group was regarded as an early maturing group, living probably less than a year, and the former as a late maturing group, living a year or slightly more. Hatch dates were distributed throughout the whole year, without reflecting any reproductive pattern. Large jumbo squid in the Gulf of California comprised a population of multiple intra-annual cohorts using alternate upwelling seasonal areas during their growth. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - Mexico|Baja California Sur MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000188296900003 L2 - jumbo squid;Dosidicus gigas;age;growth;maturation;Gulf of California;FLYING SQUID; GIANT-SQUID; BIOLOGY; ATLANTIC SO - Fisheries Research 2004 ;66(1):31-47 11552 UI - 3814 AU - Markham KR AU - Bloor SJ AU - Nicholson R AU - Rivera R AU - Shemluck M AU - Kevan PG AU - Michener C AD - New Zealand Inst Ind Res & Dev, Lower Hutt, New ZealandSmith Coll Bot Gdn, Northampton, MA 01063, USACtr Interdisciplinario Invest Para Desarrollo Int, Oaxaca 71230, MexicoQuinsigamond Coll, Worcester, MA 01606, USAUniv Guelph, Dept Environm Biol, Guelph, ON N1G 2W1, CanadaUniv Kansas, Div Entomol, Lawrence, KS 66045, USAMarkham, KR, New Zealand Inst Ind Res & Dev, POB 31310, Lower Hutt, New Zealand TI - Black flower coloration in wild Lisianthius nigrescens: Its chemistry and ecological consequences AB - The major pigments responsible for the flower color within the black flowered Gentianaceae, Lisianthius nigrescens, were characterized by HPLC and chemical analyses. HPLC analysis showed one major and one minor anthocyanin and 3 major and 3 minor flavone glycosides. The anthocyanins [delphinidin-3-O-rhamnol(1-6)galactoside and its 5-O-glucoside] comprised an extraordinary 24% of the dry weight of wild collected L. nigrescens corallas, and were accompanied in a 1:1 ratio by a range of apigenin and luteolin 8-C-glucosides and their 7-O-methyl ethers. The high levels of anthocyanins and flavones (and their copigmentation) is thought to account for the almost complete absorption of both UV and visible wavebands observed by reflectance photography MH - Canada MH - Mexico|Oaxaca MH - New Zealand MH - USA PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0939-5075 UR - ISI:000225167300003 L2 - anthocyanins;Lisianthius nigrescens;spectral reflectance analysis;ULTRAVIOLET; PIGMENTS SO - Zeitschrift fur Naturforschung C-A Journal of Biosciences 2004 ;59(9-10):625-630 11553 UI - 3144 AU - Marotta F AU - Barreto R AU - Tajiri H AU - Fuji H AU - Fesce E AD - S Giuseppe Hosp, GI Unit, Milan, ItalyInst Nacl Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City 14000, DF, MexicoJikei Univ, Endoscopy Div, Tokyo, JapanOsato Res Inst, Gifu, Japan TI - Antioxidants may revert precancerous changes of gastric mucosa: A way to counteract ongoing xenobiotic gastrointestinal damage? MH - Italy MH - Japan MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Pharmacology & Pharmacy U5 - J;Meeting Abstract AV - English IS - 0360-2532 UR - ISI:000224023200437 SO - Drug Metabolism Reviews 2004 ;36():220-220 11554 UI - 4672 AU - Marotta F AU - Barreto R AU - Tajiri H AU - Bertuccelli J AU - Safran P AU - Yoshida C AU - Fesce E AD - S Giuseppe Hosp, Hepatogastroenterol Unit, Milan, Italy. Inst Nacl Nutr Salvador Zubiran, Dept Gastroenterol, Mexico City, DF, Mexico. Jikei Univ, Endoscopy Unit, Dept Internal Med, Tokyo, Japan. Osato Res Inst, Biosci Lab, Gifu, Japan TI - The aging/precancerous gastric mucosa - A pilot nutraceutical trial AB - The aim of this study was to test the effect of antioxidant supplementation on enzymatic abnormalities and free radical-modified DNA adducts associated with premalignant changes in the gastric mucosa of elderly patients with HP-negative atrophic gastritis (CAG). Sixty patients with atrophic gastritis and intestinal metaplasia underwent a nutritional interview and a gastroscopy with multiple biopsy samples in the antrum that were processed for histology and for assaying: alpha-tocopherol, MDA, xanthine oxidase (XO), ornithine decarboxylase (ODC), and 8-OHdG. Patients were randomly allocated into three matched groups and supplemented for 6 months with (1) vitamin E, 300 mg/day; (2) multivitamin, two tablets t.i.d.; and (3) Immun-Age 6 g/day nocte (ORI, Gifu, Japan), a certified fermented papaya preparation with basic science-validated antioxidant/immunomodulant properties. Ten dyspeptic patients served as controls. Histology and biochemistry were blindly repeated at 3 and 6 months. CAG patients showed a significantly (P <.05) increased level of mucosal MDA and XO concentration that were reverted to normal by each supplementation (P <.05). All supplements caused a significant decrease of ODC (P <.01), but Immun-Age yielded the most effective (P <0.05) and was the only one significantly decreasing 8-OhdG (P <0.05). These data suggest that antioxidant supplementation, and, namely, Immun-Age, might be potential chemopreventive agents in HP-eradicated CAG patients and especially in the elderly population MH - Italy MH - Japan MH - Mexico|Distrito Federal T3 - STRATEGIES FOR ENGINEERED NEGLIGIBLE SENESCENCE: WHY GENUINE CONTROL OF AGING MAY BE FORESEEABLEAnnals of the new york academy of sciences PB - NEW YORK: NEW YORK ACAD SCIENCES RP - NOT IN FILE U4 - Multidisciplinary Sciences U5 - S;Article NT - SEnglishArticlefmarchimede@libero.it22 EAST 63RD ST, NEW YORK, NY 10021 USAANN N Y ACAD SCIBAN77 AV - English IS - 0077-8923 UR - ISI:000223002700031 L2 - oxidative stress;atrophic gastritis;ODC activity;8-OhdG;antioxidants SO - 2004 ;():195-199 11555 UI - 5504 AU - Marques MAL AU - Troiani HE AU - Miki-Yoshida M AU - Jose-Yacaman M AU - Rubio A AD - Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, GermanyCtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCtr Invest Mat Avanzados, Chihuahua 31109, Chih, MexicoUniv Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, Dept Chem Engn, Austin, TX 78712, USAUPV, EHU, Dept Fis Mat, Ctr Mixto,CSIC, San Sebastian 20018, SpainDIPC, San Sebastian 20018, SpainMarques, MAL, Free Univ Berlin, Inst Theoret Phys, Arnimallee 14, D-14195 Berlin, Germany TI - On the breaking of carbon nanotubes under tension AB - Molecular dynamics simulations and high resolution TEM experiments are performed to assess the fracture of nanotubes under high stretching conditions. Brittle or plastic response is controlled by the rate of applied strain to the tube as well as by the number of defects (in particular vacancies). Simulations predict that under high temperatures and presence of defects (as induced under the high-energy electron beam of the TEM) the tubes exhibit mainly plastic deformation, with the appearance of medium size carbon chains as the latest stage before fracture. These results are in agreement with in-situ TEM observation. Carbon exhibits a very rich dynamics of bond-breaking and bond-reconstruction that allows transformations from fullerenes to tubes to chains MH - Argentina MH - Germany MH - Mexico|Chihuahua MH - Spain MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 23 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000221410000010 L2 - MECHANICAL-PROPERTIES; FRACTURE; STRAIN; C60 SO - Nano Letters 2004 ;4(5):811-815 11556 UI - 5519 AU - Marquez-Martinez LA AU - Moog CH AD - CICESE Tijuana Ensenada, Dept Elect & Telecommun, Ensenada 22860, Baja California, MexicoCNRS, IRCCyN, UMR, F-44321 Nantes 3, FranceMarquez-Martinez, LA, CICESE Tijuana Ensenada, Dept Elect & Telecommun, Ensenada 22860, Baja California, Mexico TI - Input-output feedback linearization of time-delay systems AB - In this note, the input-output linearization problem (IOLP) fora class of single-input-single-output nonlinear systems with multiple delays in the input, the output, and the state is studied. The problem is solved by means of various static or dynamic compensators, including state and output feedback. The mathematical setting is based on some noncommutative algebraic tools and the introduction of a nonlinear version of the so-called Roesser models for this class of systems. These are claimed to be the cornerstones for studying nonlinear time-delay systems. Necessary and sufficient conditions are given for the existence of a static or pure shift output feedback which solves the IOLP. Sufficient conditions for the existence of a dynamic state feedback solution are included as well MH - France MH - Mexico|Baja California PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000221435700020 L2 - causal solutions;dynamic compensator;input-output linearization;nonlinear time-delay systems;output feedback;state feedback;static compensator SO - Ieee Transactions on Automatic Control 2004 ;49(5):781-786 11557 UI - 4819 AU - Marre M AU - Puig JG AU - Kokot F AU - Fernandez M AU - Jermendy G AU - Opie L AU - Moyseev V AU - Scheen A AU - Ionescu-Tirgoviste C AU - Saldanha MH AU - Halabe A AU - Williams B AU - Mion D AU - Ruiz M AU - Hermansen K AU - Tuomilehto J AU - Finizala B AU - Gallois Y AU - Amouyel P AU - Ollivier JP AU - Asmar R AD - Hop Bichat, Serv Diabetol & Endocrinol, F-75018 Paris, FranceHosp La Paz, Med Interna Serv, Madrid, SpainSlaska Akad Med, Klin Nefrol, Katowice, PolandInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoBajcsy Zsilinszky Korhaz III, Budapest, HungaryGroote Schuur Hosp, Cape Heart Ctr, Dept Med, Sch Med, ZA-7925 Cape Town, South AfricaHosp 64, Therapevticheski Korpus, Moscow, RussiaCHU Sart Tilman, Serv Diabetol, Sart Tilman Par Liege, BelgiumInst Nutr & Metab Dis N Paulescu, Bucharest, RomaniaHUC, Serv Med 1, Coimbra, PortugalEdith Wolfson Med Ctr, Internal Med Ward E, Giborim, Holon, IsraelUniv Leicester, Sch Med, Dept Med & Therapeut, Leicester, Leics, EnglandHosp Clin Sao Paulo, Inst Cent Cerqueira Cesar, Ctr Estudos Nefrol & Hipertensao Arterial, Sao Paulo, BrazilHosp Clin Buenos Aires, Dept Med Interna, Div Diabetol, Buenos Aires, DF, ArgentinaAarhus Amtssygehus Hosp, Med Afdeling C, Aarhus, DenmarkNatl Publ Hlth Inst, Helsinki, FinlandASCARDIO, Barquisimeto, Estado Lara, VenezuelaCtr Hosp Univ, Serv Med B, Angers, FranceInst Pasteur, Dept Etud Lipides Lipoprot, INSERM, U508, F-59019 Lille, FranceHop Mil Val de Grace, Serv Cardiol, Paris, FranceInst Cardiovasc, Paris, FranceMarre, M, Hop Bichat, Serv Diabetol & Endocrinol, 46 Rue Henri Huchard, F-75018 Paris, France TI - Equivalence of indapamide SR and enalapril on microalbuminuria reduction in hypertensive patients with type 2 diabetes: The NESTOR* study AB - Objectives To test whether microalbuminuria in patients with type 2 diabetes and hypertension is primarily dependent on the severity of hypertension, and to compare the effectiveness of two anti hypertensive drugs with opposite effects on the renin-angiotensin system [the diuretic, indapamide sustained release (SR), and an angiotensin-converting enzyme inhibitor, enalapril] in reducing microalbuminuria. Design A multinational, multicentre, controlled, double-blind, double-dummy, randomized, two-parallel-groups study over 1 year. Methods After a 4-week placebo run-in period, 570 patients (ages 60.0 +/- 9.9 years, 64% men) with type 2 diabetes, essential hypertension [systolic blood pressure (SBP) 140-180 mmHg, and diastolic blood pressure (DBP) < 110 mmHg], and persistent microalbuminuria (20-200 mu g/min) were allocated randomly to groups to receive indapamide SR 1.5 mg (n = 284) or enalapril 10 mg (n = 286) once a day. Amlodipine, atenolol, or both were added, if necessary, to achieve the target blood pressure of 140/85 mmHg. Results There was a significant reduction in the urinary albumin: creatinine ratio. Mean reductions were 35% [95% confidence interval (Cl) 24 to 43] and 39% (95% Cl 30 to 47%) in the indapamide SR and enalapril groups, respectively. Equivalence was demonstrated between the two groups [1.08 (95% Cl 0.89 to 1.31%); P = 0.01]. The reductions in mean arterial pressure (MAP) were 16.6 +/- 9.0 mmHg for the indapamide SR group and 15.0 +/- 9.1 mmHg for the enalapril group (NS); the reduction in SBP was significantly greater (P = 0.0245) with indapamide SR. More than 50% of patients in each group required additional antihypertensive therapy, with no differences between groups. Both treatments were well tolerated. Conclusions lndapamide-SR-based therapy is equivalent to enalapril-based therapy in reducing microalbuminuria with effective blood pressure reduction in patients with hypertension and type 2 diabetes MH - Argentina MH - Belgium MH - Brazil MH - Denmark MH - United Kingdom MH - Finland MH - France MH - Hungary MH - Israel MH - Mexico|Distrito Federal MH - Poland MH - Portugal MH - Romania MH - Russia MH - South Africa MH - Spain MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 24 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000222982600028 L2 - hypertension;type 2 diabetes;microalbuminuria;indapamide sustained release;enalapril;randomized trial;diuretics;angiotensin-converting enzyme inhibitors;CONVERTING ENZYME-INHIBITION; URINARY ALBUMIN EXCRETION; BLOOD-PRESSURE; ARTERIAL-HYPERTENSION; KIDNEY-FUNCTION; NIDDM SUBJECTS; NEPHROPATHY; RISK; MORTALITY; ATENOLOL SO - Journal of Hypertension 2004 ;22(8):1613-1622 11558 UI - 2523 AU - Marrero-Ponce Y AU - Castillo-Garit JA AU - Olazabal E AU - Serrano HS AU - Morales A AU - Castanedo N AU - Ibarra-Velarde F AU - Huesca-Guillen A AU - Jorge E AU - del Valle A AU - Torrens F AU - Castro EA AD - Cent Univ Las Villas, Fac Chem Pharm, Dept Pharm, Santa Clara 54830, Villa Clara, CubaCent Univ Las Villas, Chem Bioact Ctr, Dept Drug Design, Santa Clara 54830, Villa Clara, CubaCent Univ Las Villas, Appl Chem Res Ctr, Santa Clara 54830, Villa Clara, CubaCent Univ Las Villas, Chem Bioact Ctr, Dept Parasitol, Santa Clara 54830, Villa Clara, CubaUniv Nacl Autonoma Mexico, Fac Vet Med & Zootecn, Dept Parasitol, Mexico City 04510, DF, MexicoUniv Valencia, Inst Univ Ciencia Mol, E-46100 Valencia, SpainINIFTA, Div Quim Teor, RA-1900 La Plata, ArgentinaMarrero-Ponce, Y, Cent Univ Las Villas, Fac Chem Pharm, Dept Pharm, Santa Clara 54830, Villa Clara, Cuba TI - TOMOCOMD-CARDD, a novel approach for computer-aided 'rational' drug design: I. Theoretical and experimental assessment of a promising method for computational screening and in silico design of new anthelmintic compounds AB - In this work, the TOMOCOMD-CARDD approach has been applied to estimate the anthelmintic activity. Total and local (both atom and atom-type) quadratic indices and linear discriminant analysis were used to obtain a quantitative model that discriminates between anthelmintic and non-anthelmintic drug-like compounds. The obtained model correctly classified 90.37% of compounds in the training set. External validation processes to assess the robustness and predictive power of the obtained model were carried out. The QSAR model correctly classified 88.18% of compounds in this external prediction set. A second model was performed to outline some conclusions about the possible modes of action of anthelmintic drugs. This model permits the correct classification of 94.52% of compounds in the training set, and 80.00% of good global classification in the external prediction set. After that, the developed model was used in virtual in silico screening and several compounds from the Merck Index, Negwer's handbook and Goodman and Gilman were identified by models as anthelmintic. Finally, the experimental assay of one organic chemical (G-1) by an in vivo test coincides fairly well (100%) with model predictions. These results suggest that the proposed method will be a good tool for studying the biological properties of drug candidates during the early state of the drug-development process MH - Argentina MH - Cuba MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 20 U4 - Biochemistry & Molecular Biology;Biophysics;Computer Science, Interdisciplinary Applications U5 - J;Article AV - English IS - 0920-654X UR - ISI:000228582600002 L2 - anthelmintic activity;QSAR;TOMOCOMD-CARDD software;total and local quadratic indices;virtual screening;SINGLE-CHANNEL CURRENTS; FASCIOLA-HEPATICA; ASCARIS-SUUM; RESISTANCE; MUSCLE; DIAMPHENETHIDE; PRAZIQUANTEL; PHARMACOLOGY; METABOLISM; DISCOVERY SO - Journal of Computer-Aided Molecular Design 2004 ;18(10):615-634 11559 UI - 5977 AU - Marroquin JL AU - Harmony T AU - Rodriguez V AU - Valdes P AD - Ctr Res Math, CIMAT, Guanajuato 36000, MexicoNatl Autonomous Univ Mexico, Inst Neurobiol, Juriquilla, Queretaro, MexicoCtr Neurociencias, Havana, CubaMarroquin, JL, Ctr Res Math, CIMAT, Apartado Postal 402, Guanajuato 36000, Mexico TI - Exploratory EEG data analysis for psychophysiological experiments AB - A method for the exploratory analysis of electroencephalographic (EEG) data for neurophysiological experiments is presented. It is based on a time-frequency decomposition of the EEG time series, which is measured by several electrodes in the scalp surface, and includes the computation of a statistic that measures the deviations of the log-power with respect to the pre-stimulus average; the computation of a significance index for these deviations; a new type of display (the time-frequency-topography plot) for the visualization of these indices, and the segmentation of the time-frequency plane into regions with uniform activation patterns. As a particular example, an experiment to study EEG changes during figure and word categorization is analyzed in detail. (C) 2004 Elsevier Inc. All rights reserved MH - Cuba MH - Mexico|Guanajuato MH - Mexico|Queretaro PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences;Neuroimaging;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 1053-8119 UR - ISI:000220148900020 L2 - electroencephalogram;psychophysiological experiments;time-frequency-topography plot;NONSTATIONARY TIME-SERIES; WORKING-MEMORY; THETA; OSCILLATIONS; HUMANS; TASKS; ALPHA; BRAIN; WORD; LOAD SO - Neuroimage 2004 ;21(3):991-999 11560 UI - 3229 AU - Marseille E AU - Dandona L AU - Saba J AU - McConnel C AU - Rollins B AU - Gaist P AU - Lundberg M AU - Over M AU - Bertozzi S AU - Kahn JG AD - Univ Calif San Francisco, Inst Hlth Policy Studies, San Francisco, CA 94143, USAAxios Int, Dublin, IrelandNIH, Off AIDS Res, Bethesda, MD 20892, USAWorld Bank, Washington, DC 20433, USAInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoMarseille, E, Univ Calif San Francisco, Inst Hlth Policy Studies, Box 0936, San Francisco, CA 94143 USA TI - Assessing the efficiency of HIV prevention around the world: Methods of the PANCEA project AB - Objective. To develop data collection methods suitable to obtain data to assess the costs, cost-efficiency, and cost-effectiveness of eight types of HIV prevention programs in five countries. Data Source/Study Setting. Primary data collection from prevention programs for 2002-2003 and prior years, in Uganda, South Africa, India, Mexico, and Russia. Study Design. This study consisted of a retrospective review of HIV prevention programs covering one to several years of data. Key variables include services delivered (outputs), quality indicators, and costs. Data Collection/Extraction Methods. Data were collected by trained in-country teams during week-long site visits, by reviewing service and financial records and interviewing program managers and clients. Principal Findings. Preliminary data suggest that the unit cost of HIV prevention programs may be both higher and more variable than previous studies suggest. Conclusions. A mix of standard data collection methods can be successfully implemented across different HIV prevention program types and countries. These methods can provide comprehensive services and cost data, which may carry valuable information for the allocation of HIV prevention resources MH - USA MH - Ireland MH - Mexico|Morelos PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Article AV - English IS - 0017-9124 UR - ISI:000226743500005 L2 - HIV prevention;cost;cost-effectiveness;voluntary counseling and testing;risk reduction;SUB-SAHARAN AFRICA; DEVELOPING-COUNTRIES; HEALTH-CARE SO - Health Services Research 2004 ;39(6):1996-1U52 11561 UI - 5958 AU - Martin SJ AU - Medina LM AD - Univ Sheffield, Dept Anim & Plant Sci, Lab Apiculture & Social Insects, Sheffield S10 2TN, S Yorkshire, EnglandUniv Autonoma Yucatan, Fac Med Vet & Zootecn, Dept Apicultura, Yucatan 97100, MexicoMartin, SJ, Univ Sheffield, Dept Anim & Plant Sci, Lab Apiculture & Social Insects, Western Bank, Sheffield S10 2TN, S Yorkshire, England TI - Africanized honeybees have unique tolerance to Varroa mites MH - United Kingdom MH - Mexico|Yucatan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Letter AV - English IS - 1471-4922 UR - ISI:000220183900004 L2 - BEES APIS-MELLIFERA; JACOBSONI; COLONIES; REPRODUCTION; DESTRUCTOR; COLLAPSE; BROOD; L. SO - Trends in Parasitology 2004 ;20(3):112-114 11562 UI - 5231 AU - Martinell JJ AU - Porcelli F AD - Politecn Turin, Burning Plasma Res Grp, Turin, ItalyUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoMartinell, JJ, Politecn Turin, Burning Plasma Res Grp, Turin, Italy TI - A model for confinement improvement in presence of a stationary MARFE AB - A model for the observed improvement in confinement when a stationary MARFE develops is proposed. It is based on the fact that field-aligned flows are naturally created in association to a MARFE, which, when coupled to the field line curvature, give rise to plasma spin-up. The resulting radially-sheared poloidal rotation about the layer affected by the MARFE at the edge may suppress turbulence and reduce transport losses. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000221916800011 L2 - boundary plasma;radiating edge;plasma dynamics;POLOIDAL SPIN-UP; TOROIDAL PLASMAS; TOKAMAK; TEXTOR-94; TRANSITION; FLOWS; TIME SO - Physics Letters A 2004 ;326(3-4):259-266 11563 UI - 4625 AU - Martinez-Aguilar G AU - valos-Mishaan A AU - Hulten K AU - Hammerman W AU - Mason EO AU - Kaplan SL AD - Baylor Coll Med, Baylor Int Pediat Aids Initiat, Houston, TX 77030, USAInst Mexicano Seguro Social, Med Res Unit Clin Epidemiol, Durango, MexicoBaylor Coll Med, Dept Pediat, Houston, TX 77030, USATexas Childrens Hosp, Dis Lab, Houston, TX 77030, USAMartinez-Aguilar, G, Baylor Coll Med, Baylor Int Pediat Aids Initiat, Houston, TX 77030 USA TI - Community-acquired, methicillin-resistant and methicillin-susceptible Staphylococcus aureus musculoskeletal infections in children AB - Background: The clinical characteristics and virulence factors related to musculoskeletal infections caused by community-acquired, methicillin-resistant Staphylococcus aureus (MRSA) in children are not well-defined. Methods: In this retrospective study, the demographics, hospital course and outcome of children with musculoskeletal infections were reviewed from medical records and by contacting patients or their physicians. Antimicrobial susceptibilities were determined by disk diffusion. Polymerase chain reaction was performed to detect genes encoding for virulence factors. Mann-Whitney, X-2 and Kaplan-Meier tests were used for statistical analysis. Results: Community-acquired MRSA and community-acquired methicillin-susceptible S. aureus (MSSA) caused musculoskeletal infections in 31 and 28 children, respectively. The median numbers of febrile days after start of therapy were 4 and I for MRSA and MSSA patients, respectively (P = 0.001). The median numbers of hospital days were 13 and 8 for the MRSA and MSSA groups, respectively (P = 0.014). At follow-up, 2 patients in the MRSA and I in the MSSA group had developed chronic osteomyelitis. pvl and fnbB genes were found in 87 and 90% versus 24 and 64% in the MRSA versus MSSA groups, respectively. (P = 0.00001 and 0.017). Ten patients with pvl-positive strains had complications versus no patients with pvl-negative isolates (P = 0.002). Conclusions: Febrile days and hospital days were greater in children with musculoskeletal infection caused by MRSA than in those affected by MSSA, but no significant differences were found in the final outcome. pvl and fnbB genes were more frequent in the MRSA than in the MSSA strains. The presence of the pvl gene may be related to an increased likelihood of complications in children with S. aureus musculoskeletal infections MH - Mexico|Durango MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 64 U4 - Immunology;Infectious Diseases;Pediatrics U5 - J;Article AV - English IS - 0891-3668 UR - ISI:000223391400002 L2 - Staphylococcus aureus;methicillin resistance;musculoskeletal infections;PANTON-VALENTINE LEUKOCIDIN; OSTEOMYELITIS; CLINDAMYCIN; ASSOCIATION; PNEUMONIA; RISK; SKIN SO - Pediatric Infectious Disease Journal 2004 ;23(8):701-706 11564 UI - 6375 AU - Martinez-Celorio RA AU - Dirckx JJJ AU - Marti-Lopez L AU - Pena-Lecona FG AD - AC, Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Antwerp, RUCA, Lab Biomed Phys, B-2020 Antwerp, BelgiumCtr Neurociencias Cuba, Havana 10600, CubaMartinez-Celorio, RA, AC, Ctr Invest Opt, AP 1-948, Leon 37150, Gto, Mexico TI - Out-of-plane displacement measurement by means of endoscopic moire interferometry AB - An endoscopic moire technique is proposed for measuring out-of-plane displacements in difficult to reach places. The Ronchi grid is projected onto the tilted object with one endoscope with a 0degrees viewing angle. The object with the projected grid is imaged by a second endoscope with a 30degrees viewing angle onto a charge-coupled device. The captured images are stored in a PC, and are used to calculate the out-of-plane displacement of the object with a phase stepping technique. A computer generated grating method is used instead of a physical phase-shift device in the optical setup. This allows designing a set of three reference grids with profiles closely similar to the projected grating. The technique is robust against problems associated with the temporal shifting method, such as nonlinear phase shift and noise. To test the feasibility of the technique the measurement of out-of-plane displacements of about 35 mum of a latex membrane under deformation is demonstrated. The advantages and disadvantages are discussed. (C) 2004 American Institute of Physics MH - Belgium MH - Cuba MH - Mexico|Guanajuato PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Instruments & Instrumentation;Physics, Applied U5 - J;Article AV - English IS - 0034-6748 UR - ISI:000188532400031 L2 - HUMAN TYMPANIC MEMBRANE; STATIC PRESSURE; DEFORMATION SO - Review of Scientific Instruments 2004 ;75(2):492-496 11565 UI - 3920 AU - Martinez-Cordero FI AU - Leung PS AD - CIAD, AC Unidad Mazatlan, Lab Econ Acuicola, Mazatlan, Sinaloa, MexicoUniv Hawaii Manoa, Dept Mol Biosci & Bioengn, Honolulu, HI 96822, USAMartinez-Cordero, FI, CIAD, AC Unidad Mazatlan, Lab Econ Acuicola, AP 711, Mazatlan, Sinaloa, Mexico TI - Sustainable aquaculture and producer performance: measurement of environmentally adjusted productivity and efficiency of a sample of shrimp farms in Mexico AB - The competition among shrimp producing countries, the rapid advances in technology and the increase in market demand suggest that the shrimp industry at a global level and in Mexico in particular needs to take appropriate measures to maintain its viability and be able to compete successfully. This can be achieved by making better use of the available scarce resources and appropriate technology without further deteriorating the environment. Decision makers, i.e. policy-makers and farmers, are challenged with the responsibility of planning and conducting aquaculture development in a sustainable way whereby social, environmental and economic goals are simultaneously satisfied. Based on an unbalanced panel of semi-intensive shrimp farms containing primary-source information at pond level for the period 1994, 1996-1998 in northwest Mexico, this paper assesses farm performance indicators adjusted to incorporate environmental impacts. This 4-year time series coincides with a switch in the species reared in commercial shrimp farms from white shrimp (first 2 years) to blue shrimp, as a consequence of viral disease outbreaks in the former species which impacted operations in Mexico in 1995 and 1996. Therefore, efficiency and productivity can be measured and the results can be analyzed in correspondence with three events: use of white or blue shrimp in operations; the effect of experience of working with one species after many years (white shrimp) and to initiate a learning curve with a new species (blue shrimp) after 1996; and the effect of the viral outbreak on production performance. Using an input distance function approach, total factor productivity (TFP) and technical efficiency (TE) using both traditional (T) and environmentally adjusted (EA) indicators were examined. TFP was reduced in 1996-1998 compared to 1994, due to a technological regression as reflected by increased input-intensive production technology resulting in an increase in undesirable outputs. The learning curve resulting from a shift from white shrimp to blue shrimp production species resulted in higher FCRs, water exchange and pollution emissions, despite increasing shrimp yields. In all years except 1994, EA TE and EA TFP were lower than the traditional TE and TFP scores. TE and TFP had an opposite behavior than yields in this period of time. In order to improve the technological change (TC) component of TFP in light of stable TE scores, increased government assistance in disseminating technological know-how is necessary to improve TFP at a faster rate during the transition period. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Sinaloa MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000225070700018 L2 - undesirable outputs;production performance;TFP;efficiency;shrimp farming;DISTANCE FUNCTION-APPROACH; TECHNICAL EFFICIENCY; UNDESIRABLE OUTPUTS; CANADIAN PULP; INDUSTRY; FRONTIER; PROGRESS; GROWTH; INPUT; DEA SO - Aquaculture 2004 ;241(1-4):249-268 11566 UI - 3837 AU - Martinez-Diaz-de-Leon A AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoMartinez-Diaz-De-Leon, A, PMB 70,POB 189003, Coronado, CA 92178, USA TI - Spatial variability of wave data from Todos Santos Bay, Baja California, Mexico AB - With tourism industry becoming the most important economic activity along the northwest cost of Baja California, new and expensive coastal developments are being built, increasing the relevance of gathering local wave data, even when this span a short period of time. Moreover, the value of this wave data improves if they are used to show that deep-water wave characteristics obtained from a remote location can be extrapolated to fairly represent local wave conditions. In this work wave observations during winter 2001-2002 in four sites within Todos Santos Bay, Baja California, Mexico, are used to document wave characteristics and their spatial variability within the Bay. The possibility of extrapolating into the Bay deep-water wave data from a remote location is also investigated. Results show a marked wave height spatial variability within the Bay, where in some places wave heights can be as much as 2.5 times higher than those measured at other sites. Wave height spatial variability is induced mainly by a combination of a shoaling effect, a convergence of energy, induced by wave refraction as waves enter the Bay, and a shelter effect, produced by the presence of Todos Santos Islands. Regression analysis between wave heights inside Todos Santos Bay and a deep-water station in southern California show a highly coherent wave climate between both places which provides the opportunity to reconstruct the wave climate for Todos Santos Bay from the long-term deep-water wave measurements MH - Mexico|Baja California MH - USA PB - LAWRENCE: COASTAL EDUCATION & RESEARCH FOUNDATION RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Geography, Physical;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0749-0208 UR - ISI:000225276900024 L2 - wave statistics;wave refraction;CDIP SO - Journal of Coastal Research 2004 ;20(4):1231-1236 11567 UI - 4336 AU - Martinez-Espinoza AD AU - Ruiz-Herrera J AU - Leon-Ramirez CG AU - Gold SE AD - Univ Georgia, Dept Plant Pathol, Athens, GA 30602, USAInst Politecn Nacl, Dept Ingn Genet, Unidad Irapuato, Ctr Invest & Estudios Avanzados, Irapuato, MexicoGold, SE, Univ Georgia, Dept Plant Pathol, Athens, GA 30602, USA TI - MAP kinase and CAMP signaling pathways modulate the pH-induced yeast-to-mycelium dimorphic transition in the corn smut fungus Ustilago maydis AB - Acid pH induces the yeast-to-mycelium transition in haploid cells of Ustilago maydis. We tested two signal transduction pathways known to be involved in dimorphism for roles in acid-induced filamentation. In wild-type cells intracellular cAMP levels were reduced under acid growth. A mutant defective in the regulatory subunit of PKA, ubc1, failed to respond to acid induction on solid medium, but in liquid medium showed a mycelial phenotype at acid pH. Mutants in the pheromone-responsive MAP kinase pathway lost the capacity to grow as mycelium at acid pH, while a mutant in the pheromone response-transcriptional regulator, prf1, behaved as wild-type. Filamentation by both ubc1 and prf1 mutants was inhibited by addition of cAMP. A putative MAP kinase cascade adaptor protein gene, ubc2, complemented a previously identified myc mutant strain defective in pH-induced myceliation. These results indicate that pH-dependent dimorphism is regulated by two known signaling pathways but that an effector for cAMP signaling alternative to Ubc1 is present in U. maydis and that Prf1 is not the sole downstream target of MAP kinase signaling MH - Mexico|Guanajuato MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000224199500008 L2 - DEPENDENT PROTEIN-KINASE; FILAMENTOUS GROWTH; CANDIDA-ALBICANS; PATHOGENIC DEVELOPMENT; MAGNAPORTHE-GRISEA; PHEROMONE RESPONSE; CATALYTIC SUBUNIT; GENE-EXPRESSION; LIFE-CYCLE; U-MAYDIS SO - Current Microbiology 2004 ;49(4):274-281 11568 UI - 6363 AU - Martinez-Fernandeza E AU - costa-Salmon H AU - Rangel-Davalos C AD - Univ Autonoma Baja Calif Sur, Unidad Pichilingue, Lab Expt Acuacultura, La Paz 23081, BCS, MexicoInst Nacl Pesca, Direcc Gen Invest Acuacultura, Mexico City, DF, MexicoMartinez-Fernandeza, E, James Cook Univ N Queensland, Sch Marine Biol & Aquaculture, Pearl Oyster Res Grp, Townsville, Qld 4811, Australia TI - Ingestion and digestion of 10 species of microalgae by winged pearl oyster Pteria sterna (Gould, 1851) larvae AB - Ten species of microalgae were tested for ingestion and digestion in Pteria sterna larvae using epifluorescence microscopy to choose an appropriate diet. An experiment was conducted using 2, 4, 5 (straight-hinge) 10 and 22 (umbo stage) day old larvae. Larvae were stocked in 150 ml flasks at 30 ml(-1) and fed 100,000 algal cells ml(-1) of each species individually. Larvae were fed for 1 h and then were observed under the microscope to detect ingestion; larvae were then sieved and placed in flasks containing filtered seawater and were observed after 1 and 2 h to analyse digestion for the microalgae ingested. Out of the 10 species administered, only Nannochloris sp., Pavlova lutheri and Isochrysis aff. galbana (T-ISO) were ingested, and only the last two species were digested. No ingestion of Phaeodactylum tricornutum, Chaetoceros muelleri, Ch. calcitrans, Thalassiosira weisflogii, Dunaliella salina, Tetraselmis tetrathele and T. suecica was evident at any stage of larval development tested. Only T-ISO and P. lutheri should be used for larval rearing of P. sterna until other species are identified as suitable (ingested and digested) for this species. (C) 2004 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Baja California Sur MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000188602600033 L2 - digestion;epifluorescence microscopy;ingestion;larvae;microalgae;Pteria sterna;pearl oyster;PINCTADA-MARGARITIFERA L.; EPIFLUORESCENCE MICROSCOPY; CRASSOSTREA-GIGAS; NUTRITIONAL-VALUE; VELIGER LARVAE; CULTURE; SPAT; SURVIVAL; GROWTH SO - Aquaculture 2004 ;230(1-4):417-423 11569 UI - 6317 AU - Martinez-Flores HE AU - Chang YK AU - Martinez-Bustos F AU - Sgarbieri V AD - Univ Michoacana, Escuela Quimicofarmacobiol, Morelia 58240, Michoacan, MexicoCtr Quim & Nutr Aplicada, Inst Tecnol Alimentos, BR-13073001 Campinas, SP, BrazilIPN, CINVESTAV, Queretaro 76230, MexicoUNICAMP, FEA, DTA, BR-13080970 Campinas, SP, BrazilMartinez-Flores, HE, Univ Michoacana, Escuela Quimicofarmacobiol, Tzintzuntzan 173,Col Matamoros, Morelia 58240, Michoacan, Mexico TI - Effect of high fiber products on blood lipids and lipoproteins in hamsters AB - Serum and liver lipidemic responses in hamsters fed diets containing 2% cholesterol and different dietary fiber sources were studied. The following diets were made from: a) the control diet made from extruded cassava starch (CSH) contained 9.3% cellulose, b) cassava starch extruded with 9.7% resistant starch (CS-RS), c) cassava starch extruded with 9.9% oat fiber (CS-OF), d) the reference diet contained 9.5% cellulose, and no cholesterol was added. Total cholesterol, LDL+VLDL-cholesterol and triglycerides were significantly lower (P < 0.05) in serum of hamsters fed on the CS-RS (17.87%, 62.92% and 9.17%, respectively) and CS-OF (15.12%, 67.41% and 18.35%, respectively) diets, as compared to hamster fed with the CSH diet. Similar results were found in the livers of hamsters fed on the CS-RS and CS-OF diets, as compared to hamsters fed with the CSH diet. The diets containing these fibers could be used as active ingredients in human diets to improve the human health. (C) 2004 Elsevier Inc. All rights reserved MH - Brazil MH - Mexico|Michoacan MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0271-5317 UR - ISI:000188702900008 L2 - resistant starch;oat fiber;cholesterol;lipids;triglycerides;hamster;RESISTANT STARCH; WHEAT BRAN; RICE BRAN; OAT-BRAN; CHOLESTEROL; DISEASE; DIETS; RISK; MEN SO - Nutrition Research 2004 ;24(1):85-93 11570 UI - 1904 AU - Martinez-Garcia R AU - Reguera E AU - Balmaseda J AU - Ramos G AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Unidad Qro, Queretaro 76040, MexicoIPN, Escuela Super Fis & Matemat, Depto Fis, Mexico City 07738, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, Havana 10400, Cuba TI - On the crystal structures of some nickel hexacyanoferrates (II,III) AB - The crystal structures of some nickel hexacyanoferrates (II, III), including mixed compositions containing Na+, K+ and Cs+, were resolved and refined from XRD powder patterns. Data from infrared, Mossbauer and adsorption techniques provided complementary structural information. The crystal structures of Ni-3[Fe(CN)(6)](2)center dot 16H(2)O and NiCS2[Fe(CN)(6)] were refined in space group Fm3m. NiNa2[Fe(CN)(6)]center dot 2H(2)O and NiK2[Fe(CN)(6)]center dot 2H(2)O were found to be orthorhombic (space group Pmn2(1)). This structure (Pmn21) results from a distortion around the alkali ion, which appears as a monohydrated interstitial species. On ionic exchange in an aqueous solution containing Cs+, the orthorhombic distortion disappears and the cubic cell is obtained. Cs+ is a large cation and space is not available for interstitial water molecules. This orthorhombic model is also supported by the Mossbauer spectra of the ferrous analogs, FeK2[Fe(CN)(6)]center dot xH(2)O and Fe[Pt(CN)(6)]. (c) 2004 International Centre for Diffraction Data MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - NEWTOWN SQ: J C P D S-INT CENTRE DIFFRACTION DATA RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 0885-7156 UR - ISI:000223780200012 L2 - nickel hexacyanoferrates (II,III);crystal structure;ferrocyanide;ferricyanide;Rietveld;PRUSSIAN BLUE; MOLECULAR-SIEVES; TEMPERATURE; DIFFRACTION; BEHAVIOR; NEUTRON; MAGNET; SALTS SO - Powder Diffraction 2004 ;19(3):284-291 11571 UI - 4432 AU - Martinez-Gomez M AU - Juarez M AU - Distel H AU - Hudson R AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City 04510, DF, MexicoUniv Autonoma Tlaxcala, Ctr Tlaxcala Biol Conducta, Mexico City, DF, MexicoUniv Munich, Inst Med Psychol, D-8000 Munich, GermanyHudson, R, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Apartado Postal 70228, Mexico City 04510, DF, Mexico TI - Overlapping litters and reproductive performance in the domestic rabbit AB - Rabbits (Oryctolagus cuniculus), like many small mammals, have a marked postpartum estrus, and during the breeding season, are often both pregnant and lactating. We examined reproductive performance and allocation of resources by rabbit mothers with overlapping litters under presumably optimal conditions of unrestricted food, standardized litter size, and young reproductive age. Even under these conditions, females raising overlapping litters incurred higher costs in terms of greatly increased food intake and pup mortality than females raising nonoverlapping litters. Despite such costs, females with overlapping litters raised a larger total number of young to weaning than females without the load of simultaneous lactation and pregnancy. By more than doubling food intake during lactation, females maintained a stable baseline body weight throughout the study, suggesting that this, in a species with low fat reserves, might have priority over the short-term raising of a maximum number of young. Contrary to the expectation that females with overlapping litters would allocate more resources to their senior young, no appreciable difference in number, growth, or survival between pups of senior and junior litters was found either at birth or weaning. While this might reflect a strategy in this opportunistic breeder of distributing reproductive chances similarly between senior and junior litters, it is now necessary to investigate females' breeding strategy when resources are limited. (C) 2004 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 11 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000223803700005 L2 - Oryctolagus cuniculus;mother-young conflict;sibling competition;milk intake;maternal food intake;maternal body weight;ORYCTOLAGUS-CUNICULUS L; NEW-SOUTH-WALES; WILD RABBIT; CONCURRENT PREGNANCY; REMATING INTERVAL; FETAL SURVIVAL; FEMALE RABBITS; GREAT TIT; LACTATION; MORTALITY SO - Physiology & Behavior 2004 ;82(4):629-636 11572 UI - 5101 AU - Martinez-Gonzalez D AU - Bonilla-Jaime H AU - Morales-Otal A AU - Henriksen SJ AU - Velazquez-Moctezuma J AU - Prospero-Garcia O AD - Univ Nacl Autonoma Mexico, Grp Neurociencias, Dept Fisiol, Fac Med, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoScripps Res Inst, Dept Neuropharmacol, La Jolla, CA, USAMartinez-Gonzalez, D, Univ Nacl Autonoma Mexico, Grp Neurociencias, Dept Fisiol, Fac Med, Mexico City 04510, DF, Mexico TI - Oleamide and anandamide effects on food intake and sexual behavior of rats AB - Oleamide is a lipid with diverse properties, including cannabinoid-like activity. For example, it induces the classic triad of effects attributable to these molecules: decrease in core temperature, hypolocomotion, and reduction in pain perception. However, as it binds to the cannabinoid receptors (CB1) only at high concentrations, it is not considered an actual endocannabinoid. In this study, we tested the effect of oleamide on food intake and sexual behavior and compared it to the effect induced by anandamide. Results indicate that oleamide and anandamide increased food intake during the 3 h post-injection. In addition, anandamide but not oleamide induced changes in sexual performance. This study further supports the role of endocannabinoids in food ingestion and male sexual behavior and gives additional support to the notion that, although oleamide might not be an endocannabinoid, it shares some effects with them. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000222328800001 L2 - endocannabinoids;lipids;marijuana;sexual behavior;food intake;LEPTIN RECEPTOR; HYPOTHALAMUS; BRAIN; MICE; MODULATION; NEURONS; SLEEP SO - Neuroscience Letters 2004 ;364(1):1-6 11573 UI - 6099 AU - Martinez-Guerra R AU - Diop S AD - CINVESTAV, Dept Control Automat, IPN, Mexico City, DF, MexicoCNRS, LSS, F-91192 Gif Sur Yvette, FranceMartinez-Guerra, R, CINVESTAV, Dept Control Automat, IPN, AP 14-740,CP, Mexico City, DF, Mexico TI - Diagnosis of nonlinear systems using an unknown-input observer: an algebraic and differential approach AB - The authors address the diagnosis problem in nonlinear systems by using the concept of the differential transcendence degree of a differential field extension. The authors also consider the algebraic observability concept of the variable which models the failure presence for the solvability of the diagnosis problem. The construction of a reduced-order uncertainty observer (unknown-input observer) to estimate the fault variable is the key step in the proposed approach. A simulation example that deals with a bioreactor process is presented to illustrate the effectiveness of the suggested approach MH - France MH - Mexico|Distrito Federal PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Instruments & Instrumentation U5 - J;Article AV - English IS - 1350-2379 UR - ISI:000189305100019 L2 - ROBUST RESIDUAL GENERATION; FAULT-DETECTION; FAILURE-DETECTION; GEOMETRIC APPROACH; DETECTION FILTERS; STATE ESTIMATION; DYNAMIC-SYSTEMS; ESTIMATORS; DESIGN SO - Iee Proceedings-Control Theory and Applications 2004 ;151(1):130-135 11574 UI - 3768 AU - Martinez-Huitle CA AU - Quiroz MA AU - Comninellis C AU - Ferro S AU - De Battisti A AD - Univ Ferrara, Dipartmento Chim, I-44100 Ferrara, ItalyFundac Univ Amer Puebla, Dept Quim & Biol, Puebla 72820, MexicoSwiss Fed Inst Technol, Inst Chem Engn, CH-1015 Lausanne, SwitzerlandMartinez-Huitle, CA, Univ Ferrara, Dipartmento Chim, Via Borsari 46, I-44100 Ferrara, Italy TI - Electrochemical incineration of chloranilic acid using Ti/IrO2, Pb/PbO2 and Si/BDD electrodes AB - The electrochemical oxidation of chloranilic acid (CAA) has been studied in acidic media at Pb/PbO2, boron-doped diamond (Si/BDD) and Ti/lrO(2) electrodes by bulk electrolysis experiments under galvanostatic control. The obtained results have clearly shown that the electrode material is an important parameter for the optimization of such processes, deciding of their mechanism and of the oxidation products. It has been observed that the oxidation of CAA generates several intermediates eventually leading to its complete mineralization. Different current efficiencies were obtained at Pb/PbO2 and BDD, depending on the applied current density in the range from 6.3 to 50 mA cm(-2). Also the effect of the temperature on Pb/PbO2 and BDD electrodes was studied. UV spectrometric measurements were carried out at all anodic materials, with applied current density of 25 and 50 mA cm(-2). These results showed a faster CAA elimination at the BDD electrode. Finally, a mechanism for the electrochemical oxidation of CAA has been proposed according to the results obtained with the HPLC technique. (C) 2004 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Puebla MH - Switzerland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 19 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000225484900003 L2 - chloranilic acid;electrochemical oxidation;acidic media;anodic material;wastewater treatment;WASTE-WATER TREATMENT; DOPED DIAMOND ELECTRODES; MODEL ORGANIC SUBSTRATE; P-NITROSODIMETHYLANILINE; ANODIC-OXIDATION; ELECTROCATALYSIS; PHENOL; DEGRADATION; POLLUTANTS; EVOLUTION SO - Electrochimica Acta 2004 ;50(4):949-956 11575 UI - 5885 AU - Martinez-Laso J AU - Moscoso J AU - Zamora J AU - Martin-Villa M AU - Lowy E AU - Vargas-Alarcon G AU - Serrano-Vela JI AU - Gomez-Casado E AU - rnaiz-Villena A AD - Univ Complutense, Fac Med, Dept Inmunol Microbiol, E-28040 Madrid, SpainUniv Complutense Hosp, Dept Immunol, Madrid 28040, SpainInst Nacl Cardiol Ignacio Chavez, Dept Physiol, Cellular Biol Sect, Mexico City, DF, MexicoUniv Panamericana, Escuela Med, Dept Mol Biol, Mexico City, DF, MexicoArnaiz-Villena, A, Univ Complutense, Fac Med, Dept Inmunol Microbiol, Avda Complutense S-N,Pabellon 5,Planta 4A, E-28040 Madrid, Spain TI - Different evolutionary pathway of B*570101 and B*5801 (B17 group) alleles based in intron sequences AB - Two theories about MHC allele generation have been put forward: (1) point mutation diversification and/or (2) gene conversion events. A model supporting the existence of both of these mechanisms is shown in this paper; the possible evolution of the HLA-B*570101 and HLA-B*5801 alleles (which belong to the HLA-B17 serology group) is studied. The hypothesis favoured is that gene conversion events have originated these alleles, because intron sequences are also analysed. Evolution by point mutation should only be accepted if flanking introns have also been sequenced MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Genetics & Heredity;Immunology U5 - J;Article AV - English IS - 0093-7711 UR - ISI:000220458900008 L2 - NAHUA AZTEC DESCENT; AMERINDIANS; MEXICAN SO - Immunogenetics 2004 ;55(12):866-872 11576 UI - 4970 AU - Martinez-Linares J AU - Harmin DA AD - Univ Michoacana San Nicolas Hidalgo, Fac Ingn Tecnol Madera, Morelia 58060, Michoacan, MexicoUniv Kentucky, Dept Phys & Astron, Lexington, KY 40506, USAMartinez-Linares, J, Univ Michoacana San Nicolas Hidalgo, Fac Ingn Tecnol Madera, Edificio D Ciudad Univ, Morelia 58060, Michoacan, Mexico TI - "Quality" of a which-way detector AB - We introduce a measure Q of the "quality" of a quantum which-way detector, which characterizes its intrinsic ability to extract which-way information in an asymmetric two-way interferometer. The "quality" Q allows one to separate the contribution to the distinguishability of the ways arising from the quantum properties of the detector from the contribution stemming from a priori which-way knowledge available to the experimenter, which can be quantified by a predictability parameter P. We provide an inequality relating these two sources of which-way information to the value of the fringe visibility displayed by the interferometer. We show that this inequality is an expression of duality, allowing one to trace the loss of coherence to the two reservoirs of which-way information represented by Q and P. Finally, we illustrate the formalism with the use of a quantum logic gate: the symmetric quanton-detecton system (SQDS). The SQDS can be regarded as two qubits trying to acquire which-way information about each other. The SQDS will provide an illustrating example of the reciprocal effects induced by duality between system and which-way detector MH - Mexico|Michoacan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000222471400016 L2 - QUANTUM ERASURE; ATOM INTERFEROMETER; FRINGE VISIBILITY; COMPLEMENTARITY; INFORMATION SO - Physical Review A 2004 ;69(6): 11577 UI - 6431 AU - Martinez-Martinez A AU - Reyes-Ruiz JM AU - Martinez-Torres A AU - Miledi R AD - Univ Calif Irvine, Cellular & Mol Neurobiol Lab, Dept Neurobiol & Behav, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Inst Neurobiol, Lab Neurobiol Mol & Celular, Queretaro, MexicoMiledi, R, Univ Calif Irvine, Cellular & Mol Neurobiol Lab, Dept Neurobiol & Behav, McGaugh Hall 1115, Irvine, CA 92697 USA TI - Functional expression in frog oocytes of human rho 1 receptors produced in Saccharomyces cerevisiae AB - The yeast Saccharomyces cerevisiae was engineered to express the pi subunit of the human gamma-aminobutyric acid rho1 (GABArho1) receptor. RNA that was isolated from several transformed yeast strains produced fully functional GABA receptors in Xenopus oocytes. The GABA currents elicited in the oocytes were fast, nondesensitizing chloride currents; and the order of agonist potency was GABA > beta-alanine > glycine. Moreover, the receptors were resistant to bicuculline, strongly antagonized by (1,2,5,6 tetrahydropyricline-4-yl)methylphosphinic acid, and modulated by zinc and lanthanum. Thus, the GABA receptors expressed by the yeast mRNA retained all of the principal characteristics of receptors expressed by cRNA or native retina mRNAs. Western blot assays showed immunoreactivity in yeast plasma membrane preparations, and a rho1-GFP fusion gene showed mostly intracellular distribution with a faint fluorescence toward the plasma membrane. In situ immunodetection of rho1 in yeast demonstrated that some receptors reach the plasma membrane. Furthermore, microtransplantation of yeast plasma membranes to frog oocytes resulted in the incorporation of a small number of functional yeast rho1 receptors into the oocyte plasma membrane. These results show that yeast may be useful to produce complete functional ionotropic receptors suitable for structural analysis MH - USA MH - Mexico|Queretaro PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000188210400049 L2 - GABA(C);recombinant expression;yeast;NICOTINIC ACETYLCHOLINE-RECEPTOR; XENOPUS-OOCYTES; MEMBRANES; PHARMACOLOGY; SUBUNITS; PROTEINS; CLONING SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(2):682-686 11578 UI - 4365 AU - Martinez-Meyer E AU - Peterson AT AU - Navarro-Siguenza AG AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USANatl Autonomous Univ Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USA TI - Evolution of seasonal ecological niches in the Passerina buntings (Aves : Cardinalidae) AB - The evolution of migration has long been considered complex and recent work has demonstrated additional complexity: some species follow the same ecological conditions throughout the year, whereas others 'switch niches' between breeding and wintering ranges. Hypotheses regarding the evolution of migration would generally predict niche-following as primitive, and niche-switching as derived. However, no test has, to our knowledge, yet determined the directionality of evolution of these states within a lineage. We present an analysis of phylogenetic dimensions of seasonal niches in the Passerina buntings that indicates greater evolutionary change in the niches of breeding populations than among those of wintering populations. These results are consistent with hypotheses of (i) niche conservatism (in winter, at least) across a recently speciated lineage; and (ii) the derived state of the breeding (rather than winter) ecological niches of each species MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 9 U4 - Biology U5 - J;Article AV - English IS - 0962-8452 UR - ISI:000223994100008 L2 - migration;Passerina;phylogeny;ecological niche modelling;FLYCATCHER MYIARCHUS-SWAINSONI; HETEROGENEOUS ENVIRONMENTS; AVIAN MIGRATION; HABITAT; DISTRIBUTIONS; PERSPECTIVE; SPECIMENS; FRAMEWORK; AMERICA; MODELS SO - Proceedings of the Royal Society of London Series B-Biological Sciences 2004 ;271(1544):1151-1157 11579 UI - 5147 AU - Martinez-Meyer E AU - Townsend Peterson A AU - Hargrove WW AD - Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAOak Ridge Natl Lab, Geog Informat Sci & Technol Grp, Oak Ridge, TN 37831, USAMartinez-Meyer, E, Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Tercer Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Ecological niches as stable distributional constraints on mammal species, with implications for Pleistocene extinctions and climate change projections for biodiversity AB - Aim Theoretical work suggests that species' ecological niches should remain relatively constant over long-term ecological time periods, but empirical tests are few. We present longitudinal studies of 23 extant mammal species, modelling ecological niches and predicting geographical distributions reciprocally between the Last Glacial Maximum and present to test this evolutionary conservatism. Location This study covered distributional shifts in mammal species across the lower 48 states of the United States. Methods We used a machine-learning tool for modelling species' ecological niches, based on known occurrences and electronic maps summarizing ecological dimensions, to assess the ability of ecological niches as modelled in one time period to predict the geographical distribution of the species in another period, and vice versa. Results High intertemporal predictivity between niche models and species' occurrences indicate that niche conservatism is widespread among the taxa studied, particularly when statistical power is considered as a reason for failure of reciprocal predictions. Niche projections to the present for 8 mammal taxa that became extinct at the end of the Pleistocene generally increased in area, and thus do not support the hypothesis of niche collapse as a major driving force in their extinction. Main conclusions Ecological niches represent long-term stable constraints on the distributional potential of species; indeed, this study suggests that mammal species have tracked consistent climate profiles throughout the drastic climate change events that marked the end of the Pleistocene glaciations. Many current modelling efforts focusing on anticipating climate change effects on species' potential geographical distributions will be bolstered by this result - in essence, the first longitudinal demonstration of niche conservatism MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 51 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0960-7447 UR - ISI:000222175600003 L2 - climate change modelling;ecological niche;extinction;GARP;geographical distribution;Pleistocene;mammals;North America;EUROPEAN HIGHER-PLANTS; UNITED-STATES; HETEROGENEOUS ENVIRONMENTS; GEOGRAPHIC DISTRIBUTIONS; ATMOSPHERIC CO2; CARBON STORAGE; CHANGE IMPACTS; GREAT-BASIN; EVOLUTION; MODELS SO - Global Ecology and Biogeography 2004 ;13(4):305-314 11580 UI - 4988 AU - Martinez-Mir A AU - Zlotogorski A AU - Londono D AU - Gordon D AU - Grunn A AU - Uribe E AU - Horev L AU - Ruiz IM AU - Davalos NO AU - Alayan O AU - Liu J AU - Gilliam TC AU - Miljkovic J AU - Stanimirovic A AU - Salas-Alanis JC AU - Christiano AM AD - Columbia Univ, Columbia Genome Ctr, New York, NY, USARockefeller Univ, New York, NY 10021, USAHosp Gen Occidente Seguro Social, Zapopan, Jalisco, MexicoHadassah Med Ctr, IL-91120 Jerusalem, IsraelUniv Autonoma Nuevo Leon, Med Serv, Nuevo Leon, MexicoMaribor Teaching Hosp, Maribor, SloveniaUniv Zagreb, Sch Med, Zagreb 41001, Croatia TI - Identification and refinement of a locus for type I punctate palmoplantar keratoderma on chromosome 15q22-24 MH - Croatia MH - Israel MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - Slovenia MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Dermatology U5 - J;Meeting Abstract AV - English IS - 0022-202X UR - ISI:000220660500514 SO - Journal of Investigative Dermatology 2004 ;122(3):A78-A78 11581 UI - 6568 AU - Martinez-Murillo C AU - Quintana S AU - Ambriz R AU - Benitez H AU - Berges A AU - Collazo J AU - Esparza A AU - Pompa T AU - Taboada C AU - Zavala S AU - Larochelle MR AU - Bentkover JD AD - IMSS, Ctr Med Nacl Siglo 21, Banco Cent Sangre, Clin Hemofilia, Mexico City 06720, DF, MexicoInnovat Hlth Solut Corp, Brookline, MA, USAIMSS, Ctr Med Nacl La Raza, Gen Hosp, Mexico City, DF, MexicoSsa, Inst Nacl Pediat, Mexico City, DF, MexicoIMSS, Hosp Especialidades, Monterrey, NL, MexicoIMSS, Ctr Med Occidente, Hosp Pediat, Guadalajara, Jalisco, MexicoHosp Gen Mexico City, OD, Mexico City, DF, MexicoIMSS, Ctr Med Nacl La Raza, Hosp Pediat, Mexico City, DF, MexicoIMSS, Ctr Med Nacl Siglo 21, Hosp Pediat, Clin Hemofilia, Mexico City, DF, MexicoMartinez-Murillo, C, IMSS, Ctr Med Nacl Siglo 21, Banco Cent Sangre, Clin Hemofilia, Asv Cuauhtemoc 330 Col Doctores, Mexico City 06720, DF, Mexico TI - An economic model of haemophilia in Mexico AB - A model was developed to assess the lifetime costs and outcomes associated with haemophilia in Mexico. A retrospective chart review of 182 type A haemophiliacs was conducted for patients aged 0-34 years receiving one of three treatments: (i) cryoprecipitate at clinic; (ii) concentrate at home; or (iii) concentrate at clinic. Patients treated at home experienced 30% less joint damage, used 13-54% less factor VIII, had four times fewer clinic visits, and utilized half as many hospital days than those treated at a clinic. For cryoprecipitate at clinic patients, the annual incidence rates of HCV and HIV were calculated to be 3.6% and 1.4% respectively. The life expectancy for patients receiving cryoprecipitate and those receiving concentrate was estimated to be 49 years and 69 years respectively, with 58% of cryoprecipitate patients predicted to die of AIDS before age 69. Across the lifespan, the average annual cost of care was US$11 677 (MN$110 464) for cryoprecipitate at clinic patients, US$10 104 (M$95 580) for concentrate at home patients and US$18 819 (MN$178 027) for concentrate at clinic patients. Using a 5% discount rate, the incremental lifetime cost per year of life added for treatment with concentrate at home compared with cryoprecipitate at a clinic was US$738 (MN$6981). Rank order stability analysis demonstrated that the model was most sensitive to the cost of fVIII. These results indicate that treatment with concentrate at home compared with cryoprecipitate at a clinic substantially improves clinical outcomes at reduced annual cost levels MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Hematology U5 - J;Article AV - English IS - 1351-8216 UR - ISI:000187892000002 L2 - concentrate;cost;cryoprecipitate;economics;haemophilia;Mexico;VONWILLEBRAND DISEASE; COST-EFFECTIVENESS; HOME TREATMENT; HIV-INFECTION; THERAPY; HEPATITIS; VIRUS; CARE; CRYOPRECIPITATE; CONCENTRATE SO - Haemophilia 2004 ;10(1):9-17 11582 UI - 3839 AU - Martinez-Palacios CA AU - Ross LG AD - Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandMartinez-Palacios, CA, UMSNH, Inst Invest Sobre Recursos Nat, San Juanito Itzicuaro S-N Col San Juanito Itzicua, Morelia, Michoacan, Mexico TI - Post-hatching geotactic behaviour and substrate attachment in Cichlasoma urophthalmus (Gunther) MH - Mexico|Michoacan MH - United Kingdom PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0175-8659 UR - ISI:000225355600018 L2 - GROWTH SO - Journal of Applied Ichthyology 2004 ;20(6):545-547 11583 UI - 4353 AU - Martinez-Palacios CA AU - Morte JC AU - Tello-Ballinas JA AU - Toledo-Cuevas M AU - Ross LG AD - Univ Michoacana, Inst Invest Recursos Nat & Ambientales, Morelia, Michoacan, MexicoUniv Stirling, Inst Aquaculture, Stirling FK9 4LA, ScotlandMartinez-Palacios, CA, Univ Michoacana, Inst Invest Recursos Nat & Ambientales, CP 58330, Morelia, Michoacan, Mexico TI - The effects of saline environments on survival and growth of eggs and larvae of Chirostoma estor estor Jordan 1880 (Pisces : Atherinidae) AB - Pescado blanco, Chirostoma estor estor, is a species unique to certain Mexican altiplano lakes and is under severe environmental and fishing pressure, to the point of becoming endangered. C estor estor is now part of a programme designed to develop aquaculture technology for the species which will preserve biodiversity, enable restocking and provide a basis for semi-intensive aquaculture. Although now fully adapted to freshwater, members of the genus Chirostoma are derived from estuarine or coastal ancestors many of which are. euryhaline. This paper describes investigations of salinity tolerance in C estor estor,, designed to improve hatchery strategies and hence survival and growth. Eyed egg development was high in freshwater, maximal at about 10parts per thousand, and then significantly reduced at higher salinities. Saprolegnia infection rate was very high in freshwater, but reduced markedly at 5parts per thousand and was abolished at higher salinities. Hatching success was greatly increased by rearing eggs in moderate salinities, but allowing hatching to take place in freshwater. This may be related to inhibition of activity of chorionase or mobility of the larvae at higher salinities. Instantaneous transfer of larvae to a range of salinities resulted in very high mortalities above 10parts per thousand. Following 48-h acclimation to salinities up to 15parts per thousand, maximum survival rate over 30 days was obtained at 10parts per thousand. In terms of survival, optimum practice would be for egg development to occur at 10parts per thousand, hatching to occur at 5parts per thousand and subsequent development to take place at 10parts per thousand. Growth in dry weight over 30 days was greater at 10parts per thousand and 15parts per thousand and was significantly greater than that recorded at 0parts per thousand and 5parts per thousand. Overall, the results reveal the euryhaline capabilities of the species, and this can clearly be related to an estuarine or coastal ancestry, from which the species group radiated relatively recently. The implications and advantages of using saline environments for optimal husbandry of eggs and early larvae are discussed. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Michoacan MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000224004300038 L2 - siversides;pescado blanco;patzcuaro;salinity;euryhaline;DIFFERENT SALINITIES; FRESH-WATER; TOLERANCE; FISHES; SALT SO - Aquaculture 2004 ;238(1-4):509-522 11584 UI - 5594 AU - Martinez-Ponce G AU - Petrova T AU - Tomova N AU - Dragostinova V AU - Todorov T AU - Nikolova L AD - Bulgarian Acad Sci, Cent Lab Opt Storage & Proc Informat, Sofia 1113, BulgariaCtr Invest Opt, Guanajuato 37000, MexicoNikolova, L, Bulgarian Acad Sci, Cent Lab Opt Storage & Proc Informat, POB 95, Sofia 1113, Bulgaria TI - Investigations on photoinduced processes in a series of azobenzene-containing side-chain polymers AB - We present a spectrophotometric investigation of the processes in three azobenzene polymers induced by a linearly polarized Ar beam (488 nm). The polymers differ only in the length of the spacers attaching the chromophores to the main chain. The experimental results show that this difference determines not only the polymer structure; it also substantially influences the value of the photoinduced dichroism and its time behaviour after the illumination. We explain this on the basis of the different efficiencies of the two main photoinduced processes in the azobenzenes-the selective trans-cis isomerization and the reorientation of the trans-azobenzenes. The results from a real-time measurement of the photoinduced anisotropic changes in the refractive indices of the three polymers support this understanding MH - Bulgaria MH - Mexico|Guanajuato PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 1464-4258 UR - ISI:000221181900006 L2 - azobenzene polymers;spectral investigations;photoinduced anisotropy;LIQUID-CRYSTALS; FILMS; POLYESTER; GRATINGS SO - Journal of Optics A-Pure and Applied Optics 2004 ;6(4):324-329 11585 UI - 6026 AU - Martinez-Torres A AU - Miledi R AD - Univ Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Inst Neurobiol, Lab Neurobiol Mol & Celular, Queretaro 11141, MexicoMartinez-Torres, A, Univ Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, McGaugh Hall 1115, Irvine, CA 92697 USA TI - Expression of functional receptors by the human gamma-aminobutyric acid A gamma 2 subunit AB - gamma-Aminobutyric acid A (GABA(A)) receptors are heteromeric membrane proteins formed mainly by various combinations of alpha, beta, and gamma subunits; and it is commonly thought that the gamma2 subunit alone does not form functional receptors. In contrast, we found that cDNA encoding the gamma2L subunit of the human GABA(A) receptor, injected alone into Xenopus oocytes, expressed functional GABA receptors whose properties were investigated by using the two-microelectrode voltage-clamp technique. GABA elicited desensitizing membrane currents that recovered after a few minutes' wash. Repetitive applications of GABA induced a "run-up" of GABA currents that nearly doubled the amplitude of the first response. The GABA currents inverted direction at about -30 mV, indicating that they are carried mainly by Cl- ions. The homomeric gamma2L receptors were also activated by beta-alanine > taurine > glycme, and, like some types of heteromeric GABA(A) receptors, the gamma2L receptors were blocked by bicuculline and were potentiated by pentobarbital and flunitrazepam. These results indicate that the human gamma2L subunit is capable of forming fully functional GABA receptors by itself in Xenopus oocytes and suggest that the roles proposed for the various subunits that make up the heteromeric GABA(A) receptors in situ require further clarification MH - USA MH - Mexico|Queretaro PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000220065300101 L2 - ion channel;Xenopus oocytes;GATED ION CHANNELS; GABA(A) RECEPTORS; PHARMACOLOGICAL-PROPERTIES; XENOPUS OOCYTES; SUBUNIT; KINETICS; NEURONS; SYSTEM SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(9):3220-3223 11586 UI - 3911 AU - Martinez-Villegas N AU - Flores-Velez LM AU - Dominguez O AD - Penn State Univ, Dept Crop & Soil Sci, University Pk, PA 16802, USAUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78000, MexicoUniv Autonoma San Luis Potosi, Dept Mat, Inst Met, San Luis Potosi 78000, MexicoMartinez-Villegas, N, Penn State Univ, Dept Crop & Soil Sci, 116 Agr Sci & Ind Bldg, University Pk, PA 16802 USA TI - Sorption of lead in soil as a function of pH: a study case in Mexico AB - Reactions of lead sorption onto soil are largely affected by properties and composition of soil and its solution. In this study, the lead sorption onto regosol eutric soil from Francisco I. Madero, Zacatecas, Mexico is evaluated at different pH values. Soil samples were suspended in lead solutions of 10, 25, 50, 100, 150, 200, 300, and 400 mg/l (as Pb(NO3)(2))The pH was adjusted at 2, 3, 4, and 5.5 with nitric acid for each of the lead solution concentrations. In all the cases the ionic strength was I = 0.09 M with calcium nitrate. The solid-liquid-ratios were fixed in 1:100 and 1:200 g/ml. The results show that lead sorption increases when pH increases. Experimental isotherms were adjusted by both Langmuir and Freundlich models. The Langmuir affinity parameter, K, indicates that the lead sorption capacity of Francisco I. Madero soils is largely perceptible to pH changes. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|San Luis Potosi MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0045-6535 UR - ISI:000225119100031 L2 - lead;soil sorption;Langmuir;Freundlich;pH;ADSORPTION; METALS; OXIDES SO - Chemosphere 2004 ;57(10):1537-1542 11587 UI - 5118 AU - Martinez A AU - Goursot A AU - Coq B AU - Delahay G AD - ENSCM, UMR 5618 CNRS, Lab Mat Catalyt & Catalyse Chim Organ, F-34296 Montpellier 5, FranceInst Invest Mat, Mexico City 04510, DF, MexicoGoursot, A, ENSCM, UMR 5618 CNRS, Lab Mat Catalyt & Catalyse Chim Organ, 8 Rue Ecole Normale, F-34296 Montpellier 5, France TI - Theoretical study of the dissociation of N2O in a transition metal ion-catalyzed reaction AB - Models of Fe-zeolites have been used to study the dissociation of N2O, with and without the presence of ammonia. From Density Functional Theory calculations, the mechanism and energetics of N2O decomposition paths are presented and discussed. The influence of ammonia is analyzed. The results obtained for a single metal ion and for models including a zeolite cluster are compared. The approximate activation barrier calculated with this cluster model is in good agreement with experiment. The presence of two ammonia ligands reduces the calculated activation barrier, leading to the conclusion that ammonia plays a role in both steps of the N2O decomposition, i.e., the breaking of the ON2 bond and the reduction of the iron-oxo compounds MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000222279100013 L2 - DENSITY-FUNCTIONAL CALCULATIONS; GAUSSIAN-BASIS SETS; NITROUS-OXIDE; ZEOLITE-BETA; DINITROGEN MONOXIDE; FEZSM-5 ZEOLITES; FE-ZSM-5 ZEOLITE; EXCHANGE-ENERGY; ROW ATOMS; AB-INITIO SO - Journal of Physical Chemistry B 2004 ;108(26):8823-8829 11588 UI - 5286 AU - Martinez A AU - Pastor O AU - Estrada H AD - Tech Univ Valencia, Valencia, Spain. IT Zacatepec, Zecatepec, Morelos, Mexico. CENIDET, Cuernavaca, Morelos, Mexico TI - Isolating and specifying the relevant information of an organizational model: A process oriented towards information system generation AB - Recently, many research efforts in software engineering have been focused on integrating the organizational modeling in the software production process. The objective of these approaches is to use the organizational needs as the starting point for the generation of the information system, allowing us to assure that the functionality of the information system adequately corresponds to the tasks that are executed in the business. However, one of the principal problems of the current research work in this field is the lack of a methodological approach to isolate the relevant information to be automated by the information system. This lack is a real obstacle to producing specification of information systems from organizational models, due to the non-existence of a mechanism to filter out the irrelevant tasks. In this paper, a methodological approach for isolating and formally specifying the relevant information of an organizational model represented in Tropos Framework is presented. By doing this, we go a step further in the process of including business modeling as a key piece in the software production process MH - Mexico|Morelos MH - Spain T3 - COMPUTATIONAL SCIENCE AND ITS APPLICATIONS - ICCSA 2004Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlealimartin@dsic.upv.es opastor@dsic.upv.es hestrada@dsic.upv.es0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAE52 AV - English IS - 0302-9743 UR - ISI:000221854800084 SO - 2004 ;():783-790 11589 UI - 5433 AU - Martinez A AU - Chornet E AU - Rodrigue D AD - Univ Laval, Dept Chem Engn, Quebec City, PQ G1K 7P4, CanadaUniv Laval, CERSIM, Quebec City, PQ G1K 7P4, CanadaUniv Sherbrooke, Dept Chem Engn, Sherbrooke, PQ J1K 2R1, CanadaUniv Guadalajara, Dept Chem Engn, Guadalajara 44270, Jalisco, MexicoRodrigue, D, Univ Laval, Dept Chem Engn, Quebec City, PQ G1K 7P4, Canada TI - Steady-shear rheology of concentrated chitosan solutions AB - The rheological properties of 0.5 - 2.0% (wt/wt) chitosan solutions in steady-shear were investigated as a function of temperature (25C - 45C), acid type (acetic, lactic, and hydrochloric), and ionic strength (0 and 0.2 M NaCl) to determine their flow behavior. Viscosity and normal forces have been determined over a wide range of shear rates and the results are presented using appropriate master curves for the temperature and concentration effects. For the experimental conditions studied, chitosan solutions behaved like non-Newtonian viscoelastic shear-thinning fluids. They show a low-shear rate Newtonian plateau and a high-shear rate non-Newtonian region. All material functions (viscosity and primary normal stress) decrease with an increase in temperature and a decrease in chitosan concentration. The most important parameter affecting the rheology of the solutions has been found to be salt addition, particularly for chitosans dissolved in weak acids where electrostatic effects are believed to be important MH - Canada MH - Mexico|Jalisco PB - TRUMBULL: FOOD NUTRITION PRESS INC RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-4901 UR - ISI:000221564700004 L2 - VISCOSITY; EQUATION SO - Journal of Texture Studies 2004 ;35(1):53-74 11590 UI - 6334 AU - Martinez E AU - Garcia S AU - Marin E AU - Vasallo O AU - Pena-Rodriguez G AU - Calderon A AU - Siqueiros JM AD - CICESE, Phys Mat Grad Program, Ensenada 22800, Baja California, MexicoUniv La Habana, IMRE, Fac Fis, Havana 10400, CubaIPN, CICATA, Mexico City 11500, DF, MexicoMartinez, E, CICESE, Phys Mat Grad Program, Km 107 Carr Tijuana, Ensenada 22800, Baja California, Mexico TI - Dielectric and thermal properties of xPbTiO(3)-(1-x)SrTiO3 polycrystals AB - SrTiO3 and PbTiO3 perovskites are combined to form the xPbTiO(3)-(1 - x) SrTiO3 (PST) solid solution. In this work, a study of its dielectric and thermal properties is reported as a function of PbTiO3 content. The dielectric properties of the xPbTiO3-( 1 - x) SrTiO3 solid solution are determined through a thermoelectric analysis technique and hysteresis measurements. Such measurements made at room temperature for all compositions show the influence of one component upon the other resulting in a response to the electric field that involves a strained lattice behavior. A limiting case of antiferroelectric-like behavior is observed for x = 0.5. The thermal properties such as the specific heat capacity ( c) and thermal diffusivity (alpha) were determined using a photoacoustic technique (PA) and the temperature relaxation method (TRM). The thermal conductivity was calculated from the results obtained for c and alpha. (C) 2004 Kluwer Academic Publishers MH - Cuba MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-2461 UR - ISI:000188609600011 L2 - 2-LAYER SYSTEMS; DIFFUSIVITY; SEMICONDUCTORS; SOLIDS SO - Journal of Materials Science 2004 ;39(4):1233-1239 11591 UI - 4629 AU - Martinez F AU - Villegas H AU - Jimenez A AU - Razo R AU - Curiel DT AD - Natl Ctr Rehabil, Mexico City, DF, MexicoUNAM, Sch Med, Dept Pharmacol, Mexico City, DF, MexicoUniv Alabama, Gene Therapy Ctr, Birmingham, AL, USA TI - Effect of sexual steroid hormones on human egr-1 promoter MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Meeting Abstract AV - English IS - 1525-0016 UR - ISI:000222316600321 SO - Molecular Therapy 2004 ;9():S121-S122 11592 UI - 5296 AU - Martinez F AU - Lema J AU - Mendez R AU - Cuervo-Lopez F AU - Gomez J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Mexico City 09340, DF, MexicoUniv Santiago de Compostela, Dept Ingn Quim, Santiago De Compostela 15706, SpainGomez, J, Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol, AP 55-535, Mexico City 09340, DF, Mexico TI - Role of exopolymeric protein on the settleability of nitrifying sludges AB - The relationship of exopolymeric substances and the sludge volume indexes (SVI) of two nitrifying sludge were studied over a period of time (30 d) in two different types of reactors: (1) a stirred tank aerated nitrifying reactor (SANR) and (2) an air-lift nitrifying reactor (ALNR). Concentrations of lipids, carbohydrates and proteins of the EPS were determined in both reactors. The variation in lipids and carbohydrates was low (<10%), while the variation in the exopolymeric protein was higher. The SVI increased in accordance with the increase in the concentration of the exopolymeric protein. The number of bands of the exopolymeric protein was modified as a consequence of the change in the concentration of the exopolymeric protein. The molecular weights of the exopolymeric protein ranged from 31 to 97 in the stirred and 13 to 45 kDa in the air-lift reactor. The variations in the SVI were mainly due to the changes in the molecular weight of the exopolymeric proteins resulting in the modification of the sludge settleability characteristics. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000221916000008 L2 - sludge volume index;exopolymeric protein;molecular weights;nitrifying sludge;WASTE-WATER TREATMENT; EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; COLORIMETRIC METHOD; BIOFLOCCULATION; BIOMASS SO - Bioresource Technology 2004 ;94(1):43-48 11593 UI - 5815 AU - Martinez J AU - Sanchez-Paya K AU - Palazon JM AU - Suazo-Barahona J AU - Robles-Diaz G AU - Perez-Mateo M AD - Hosp Gen Univ Alicante, Secc Digest, Dept Gastroenterol, ES-03010 Alicante, SpainHosp Gen Univ Alicante, Serv Prevent Med, ES-03010 Alicante, SpainInst Nacl Nutr Salvador Zubiran, Pancreat Unit, Mexico City, DF, MexicoMartinez, J, Hosp Gen Univ Alicante, Secc Digest, Dept Gastroenterol, Pintor Cabrera S-N, ES-03010 Alicante, Spain TI - Is obesity a risk factor in acute pancreatitis? A meta-analysis AB - Background/Aims: Obesity has been associated with a worse prognosis in acute pancreatitis. According to some authors, obesity favours the development of local complications, while according to other reports obese patients presented more frequently systemic complications. Few studies find a relationship between obesity and mortality in acute pancreatitis. We conducted a meta-analysis of several reports that evaluate the relationship between obesity and the outcome of acute pancreatitis in order to assess its prognostic role in this disease. Methods: A MEDLINE search was conducted from 1965 to December 2002 with search terms including obesity, body mass index (BMI) and pancreatitis. A total of 12 reports were identified. Of these, only four studies included patients with mild and severe acute pancreatitis and measured obesity by BMI. The end points of the meta-analysis were the severity of acute pancreatitis, local complications, systemic complications and mortality. Obesity was defined when BMI was greater than or equal to30 kg/m(2). Pooled odds ratio ( OR) and confidence intervals (CI) were calculated according to the Mantel-Haenszel method, and heterogeneity was assessed by the multiplicative inverse variance method. Results: A total of 607 patients were evaluated. There was no heterogeneity for the variables severity, systemic complications, local complications and mortality among the included studies. Severe AP was significantly more frequent in obese patients ( OR 2.6, 95% CI 1.5 - 4.6). Furthermore, those patients developed significantly more systemic ( OR 2.0, 95% CI 1.1 4.6) and local complications ( OR 4.3, 95% CI 2.4 - 7.9). Mortality in obese patients was only slightly higher ( OR 1.3, 95% CI 0.5 - 3.6). Conclusion: Obesity is a prognostic factor favouring the development of systemic and local complications in this disease. Therefore, it should be used routinely as part of the initial assessment of the severity of a case of acute pancreatitis. Copyright (C) 2004 S. Karger AG, Basel and IAP MH - Mexico|Distrito Federal MH - Spain PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 23 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 1424-3903 UR - ISI:000220650400006 L2 - obesity;body mass index;acute pancreatitis;PROGNOSTIC-FACTORS; FAT DISTRIBUTION; BODY-WEIGHT; NECROSIS; SEVERITY; DISEASE; MORTALITY; PREDICTOR; ETIOLOGY; BILIARY SO - Pancreatology 2004 ;4(1):42-48 11594 UI - 6043 AU - Martir LGS AU - Hernandez GA AU - Cooksy AL AU - Helberg L AU - Somanathan R AU - Romero FR AD - San Diego State Univ, Dept Chem, San Diego, CA 92182, USACtr Grad Invest, Inst Tecnol Tijuana, Mexico City, DF, MexicoCooksy, AL, San Diego State Univ, Dept Chem, 5500 Campanile Dr, San Diego, CA 92182 USA TI - Conformational structures and dynamics of cis-n-alkenyl amides AB - Parallel experimental and computational studies of phenyl cis- and trans-n-alkenyl amides (tuberines) have been carried out to probe the structural and dynamic properties with particular attention to interaction between the conjugated enamides chain and the aromatic ring. The cis isomers are non-planar with 40-50degrees due to steric interactions between the enamide chain and aromatic ring,whereas the trans form is essentially planar. Rotation barriers for the carbonyl group about the C-N bond are predicted to be 18-22 kcal/mol at HF, B3LYP, and MP2 levels using the cc-pVDZ basis set. Despite its significant non-planarity, the cis conformation of tuberine is not found to be significantly less stable than the trans conformation. (C) 2003 Elsevier B.V. All fights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000220118200028 L2 - cis-enamides;n-Alkenyl amides;tuberines;rotational barriers;X-ray crystallography;LINEAR PEPTIDE ALKALOIDS; SPONGE CLIONA-CELATA; ROTATIONAL BARRIERS; BASIS-SETS SO - Journal of Molecular Structure 2004 ;691(1-3):235-240 11595 UI - 5241 AU - Martos A AU - Hernandez X AU - Yanez M AU - Moreno E AU - Pichardo B AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Astron, Madison, WI 53706, USAMartos, A, Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico TI - A plausible Galactic spiral pattern and its rotation speed AB - We report calculations of the stellar and gaseous response to a Milky Way mass distribution model including a spiral pattern with a locus as traced by K-band observations, superimposed on the axisymmetric components in the plane of the disc. The stellar study extends calculations from previous work concerning the self-consistency of the pattern. The stellar response to the imposed spiral mass is studied via computations of the central family of periodic and nearby orbits as a function of the pattern rotation speed, Omega(p), among other parameters. A fine grid of values of Omega(p) was explored, ranging from 12 to 25 km s(-1) kpc(-1). Dynamical self-consistency is highly sensitive to Omega(p) with the best fit appearing at 20 km s(-1) kpc(-1). We give an account of recent independent pieces of theoretical and observational work that are dependent on the value of Omega(p), all of which are consistent with the value found here: the recent star formation history of the Milky Way, local inferences of cosmic ray flux variations and Galactic abundance patterns. The gaseous response, which is also a function of Omegap, was calculated via 2D hydrodynamic simulations with the ZEUS code. For Omega(p) = 20 km s(-1) kpc(-1), the response to a two-armed pattern is a structured pattern of four arms, with bifurcations along the arms and interarm features. The pattern qualitatively resembles the optical arms observed in our Galaxy and other galaxies. The complex gaseous pattern appears to be linked to resonances in stellar orbits. Among these, the 4:1 resonance plays an important role, as it determines the extent of the stellar spiral pattern in the self-consistency study presented here. Our findings seemingly confirm predictions by Drimmel & Spergel (2001), based on K-band data MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221913200003 L2 - ISM : structure;Galaxy : fundamental parameters;Galaxy : kinematics and dynamics;Galaxy : structure;galaxies : spiral;RADIATION MAGNETOHYDRODYNAMICS CODE; LARGE-SCALE MORPHOLOGY; STAR-FORMATION HISTORY; 2 SPACE DIMENSIONS; MILKY-WAY DISK; ASTROPHYSICAL FLOWS; STELLAR DYNAMICS; GAS-DYNAMICS; GALAXIES; MODELS SO - Monthly Notices of the Royal Astronomical Society 2004 ;350(3):L47-L51 11596 UI - 6098 AU - Martynyuk AE AU - Lopez JIM AU - Martynyuk NA AD - UNAM, Fac Ingn, Mexico City, DF, MexicoNatl Tech Univ Ukraine, Kiev Polytech Inst, Radioengn Fac, UA-03056 Kiev, UkraineMartynyuk, AE, UNAM, Fac Ingn, Mexico City, DF, Mexico TI - Spiraphase-type reflectarrays based on loaded ring slot resonators AB - Reflective periodic arrays based on loaded ring slot resonators are analyzed. A full-wave mathematical model is developed and numerical results are presented. It is proven that the reflection angle for the normally incident circularly polarized wave can be effectively controlled by proper positioning of reactive loads in ring slot resonators. Analysis of the reflection characteristics of the Ka band one-layer reflectarray results in a conclusion that the incident wave can be effectively redirected in the directions determined by elevation angles as high as 65degrees with conversion coefficient better than -1.5,dB. It is also shown that the usage of the multilayer reflectarray leads to a considerable improvement in the reflection characteristics when it is compared with the one-layer reflectarray. The method of the waveguide simulator has been used to verify the developed mathematical model MH - Mexico|Distrito Federal MH - Ukraine PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0018-926X UR - ISI:000189269300018 L2 - antenna arrays;millimeter wave antenna arrays;phased arrays;reflectarrays;GENERALIZED SCATTERING MATRIX; ARRAY ANTENNA; APERTURES; SURFACES; PATCHES; DESIGN; SCREEN SO - Ieee Transactions on Antennas and Propagation 2004 ;52(1):142-153 11597 UI - 5983 AU - Marzantowicz W AU - Prieto C AD - UAM, Fac Math & Comp Sci, Poznan, PolandUNAM, Inst Matemat, Mexico City 04510, DF, MexicoMarzantowicz, W, UAM, Fac Math & Comp Sci, Poznan, Poland TI - The unstable equivariant fixed point index and the equivariant degree AB - A correspondence between the equivariant degree introduced by Ize, Massabo, and Vignoli and an unstable version of the equivariant fixed point index defined by Prieto and Ulrich is shown. With the help of conormal maps and properties of the unstable index, a sum decomposition formula is proved for the index and consequently also for the degree. As an application, equivariant homotopy groups are decomposed as direct sums of smaller groups of fixed orbit types, and a geometric interpretation of each summand is given in terms of conormal maps MH - Mexico|Distrito Federal MH - Poland PB - LONDON: LONDON MATH SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0024-6107 UR - ISI:000220236400015 L2 - MAPS; HOMOTOPY SO - Journal of the London Mathematical Society-Second Series 2004 ;69():214-230 11598 UI - 5898 AU - Mas JF AU - Puig H AU - Palacio JL AU - Sosa-Lopez A AD - UNAM, Inst Geog, Colonia Ctr, Morelia 58000, Michoacan, MexicoCNRS, Lab Ecol Terrestre, UMR 5552, UPS 13, F-31029 Toulouse 4, FranceUniv Autonoma Campeche, EPOMEX, Campeche 24030, Camp, MexicoMas, JF, UNAM, Inst Geog, Colonia Ctr, Aquiles Serdan 382, Morelia 58000, Michoacan, Mexico TI - Modelling deforestation using GIS and artificial neural networks AB - This study aims to predict the spatial distribution of tropical deforestation. Landsat images dated 1974, 1986 and 1991 were classified in order to generate digital deforestation maps which locate deforestation and forest persistence areas. The deforestation maps were overlaid with various spatial variables such as the proximity to roads and to settlements, forest fragmentation, elevation, slope and soil type to determine the relationship between deforestation and these explanatory variables. A multi-layer perceptron was trained in order to estimate the propensity to deforestation as a function of the explanatory variables and was used to develop deforestation risk assessment maps. The comparison of risk assessment map and actual deforestation indicates that the model was able to classify correctly 69% of the grid cells, for two categories: forest persistence versus deforestation. Artificial neural networks approach was found to have a great potential to predict land cover changes because it permits to develop complex, non-linear models. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Campeche MH - Mexico|Michoacan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Interdisciplinary Applications;Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1364-8152 UR - ISI:000220490100003 L2 - deforestation;land use/land cover change;spatial modelling;artificial neural networks;geographic information system;YUCATAN PENINSULAR REGION; LAND-COVER CLASSIFICATION; CELLULAR-AUTOMATA; COSTA-RICA; PREDICTION; INFORMATION; REGRESSION; RATES SO - Environmental Modelling & Software 2004 ;19(5):461-471 11599 UI - 4865 AU - Mascarenhas AS AU - Castro R AU - Collins CA AU - Durazo R AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22820, Baja California, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22820, Baja California, MexicoUSN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943, USAMascarenhas, AS, Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22820, Baja California, Mexico TI - Seasonal variation of geostrophic velocity and heat flux at the entrance to the Gulf of California, Mexico AB - The divergence of the surface heat flux in the Gulf of California is driven by the exchange of waters with the Pacific Ocean [Castro et al., 1994]. To estimate these exchanges, geostrophic velocities and heat fluxes were computed from nine sections of closely spaced conductivity-temperature-depth stations across the entrance to the Gulf of California between 1992 and 1999. The mean geostrophic velocity was composed of two alternating cores of inflow and outflow. The two cores that were adjacent to either coast were broader and contained the highest inflow (0.40 m/s) and outflow (-0.25 m/s) velocities, supporting the general idea of inflow along Sinaloa and outflow along Baja California (BC). During winter and spring the baroclinic outflow usually occurred near BC, and the baroclinic inflow occurred either through the center of the section and/or along the Sinaloa coast. Both inflow and outflow cores were similar to45 km wide and extended deeper than 700 dbar. Summer and fall showed a more complex pattern, with alternating cores of inflow and outflow but with inflow along Sinaloa on all cruises. During May the inflow was mainly in the center of the section, while outflow was concentrated along BC. The heat transport associated with the geostrophic flow was calculated and compared with estimates derived from surface heat budgets for the gulf [Castro et al., 1994]. Both the geostrophic flow and heat transport exhibited (for the first empirical orthagonal function mode) a strong seasonal signal with the maximum amplitude in May and the minimum amplitude in late October. A seasonal fit to the net heat transport had an amplitude of 50 x 10(12) Wand phase of 133 days, in good agreement with other authors, further validating the geostrophic velocity estimates. The heat added to (subtracted from) the Pacific Ocean accelerates (decelerates) alongshore currents and appears to propagate similar to10degrees westward as a Rossby wave MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000222781200002 L2 - geostrophic heat flux;Gulf of California;geostrophic current;NORTH PACIFIC; VARIABILITY; BALANCE; WAVES; CIRCULATION; SEAMOUNT; SALINITY; OCEAN; FLOW SO - Journal of Geophysical Research-Oceans 2004 ;109(C7): 11600 UI - 3971 AU - Masciadri E AU - Raga AC AD - Max Planck Inst Astron, D-69117 Heidelberg, GermanyUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMasciadri, E, Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany TI - Looking for outflows from brown dwarfs AB - Initial evidence of IR excess and disk mass accretion (strong Halpha emission) around brown dwarfs (BDs) seems to indicate the existence of circumstellar disks around these substellar objects. Nothing is known at present about outflows that might be launched from BDs, although jets are typically associated with the accretion in the case of standard T Tauri star disks. In this paper we calculate the Halpha emission of internal working surfaces produced by a radiative jet in a neutral and in a photoionized environment as a function of the jet parameters ( the ejection velocity v(j), shock velocity v(s), mass-loss rate. M, and radius r(j) of the jet), and we provide estimates of the Halpha luminosity for the parameters of "standard'' Herbig-Haro (HH) jets from T Tauri stars and for the parameters expected for jets from BDs. Interestingly, we find that while the mass-loss rates associated with jets from BDs are 2 orders of magnitude lower than the mass-loss rates associated with "standard'' HH jets (from T Tauri stars), their velocities are likely to be similar. Based on our calculations, we discuss the conditions in which jets from BDs can be detected, and we conclude that the Halpha luminosities of internal working surfaces of jets from BDs in a photoionized environment should be only 1 order of magnitude lower than the Halpha luminosities of T Tauri jets in a neutral environment MH - Germany MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225046300026 L2 - ISM : Herbig-Haro objects;ISM : jets and outflows;stars : low-mass, brown dwarfs;EXTRASOLAR GIANT PLANETS; STAR-FORMING REGION; LOW-MASS STARS; T-TAURI STARS; STELLAR JETS; EVOLUTIONARY MODELS; SIGMA-ORIONIS; H-ALPHA; OBJECTS; COMPANIONS SO - Astrophysical Journal 2004 ;615(2):850-854 11601 UI - 4663 AU - Masciadri E AU - Raga A AD - Max Planck Inst Astron, D-69117 Heidelberg, GermanyUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMasciadri, E, Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany TI - Exoplanet recognition using a wavelet analysis technique AB - The recognition of a planet orbiting around a star (and in general of a faint companion in a binary system) in direct imaging observations is limited at distances smaller than around 1" by the speckle and photon noise. There are also other sources of noises as artifacts produced by the adaptive optics (AO) systems that make the identification of a planet even more difficult. Techniques to recognize a planet in an automatic (and objective) way are therefore quite useful. In this Letter, we test the ability of a "wavelet analysis" technique for recognizing exoplanets in deep images obtained with ground-based telescopes and AO facilities. We present the automatic procedure developed for the detection of exoplanets, and we validate it on a deep image of a young, nearby star, which has been one of the targets of a planet search survey done with NACO/VLT. Preliminary tests show that with the proposed algorithm, it is indeed possible to recognize, in an automatic way, a planet of 12M(J) at a distance of 0".5, a planet of 5M(J) at a distance of 0".7, and a planet of 3M(J) at a distance of 1" from the star. We also show that a star/planet systems with a maximum DeltaM=4.7 mag contrast in the K band at 0".2 can be recognized automatically. This is a typical contrast for a 5M(J)-10M(J) planet and a late-type star (late M spectral type) MH - Germany MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223403600018 L2 - binaries : close;planetary systems;stars : low-mass, brown dwarfs;techniques : image processing;ENTROPY; VLT SO - Astrophysical Journal 2004 ;611(2):L137-L140 11602 UI - 5752 AU - Massieu L AU - Moran J AU - Christen Y AD - UNAM, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoIPSEN Inst, F-75016 Paris, FranceMassieu, L, UNAM, Inst Fisiol Celular, Dept Neurociencias, AP 70-253, Mexico City 04510, DF, Mexico TI - Effect of Ginkgo biloba (EGb 761) on staurosporine-induced neuronal death and caspase activity in cortical cultured neurons AB - Previous studies suggest the protective potentiality of Ginkgo biloba (EGb 761) against apoptotic cell death induced by hydroxyl radicals, staurosporine, serum deprivation and beta-amyloid (betaA) peptide. We have extended these observations to cultured cortical neurons and studied the effect of EGb 761 on neuronal survival (evaluated as MTT reduction), the presence of condensed nuclei (monitored as Hoechst staining), the time-course of caspase-1, caspase-3 and caspase-9 activation (measured by cleavage of specific fluorescent substrates) and superoxide anion production (evaluated by hydroethidine staining) after the exposure to staurosporine. Results show that 200 mug/ml of EGb 761 increased cell survival and reduced the number of condensed nuclei after the exposure to 200 nM staurosporine. Vitamin E and the spin trapper alpha-phenyl-N-tert-butylnitrone (PBN) also significantly increased cell survival. In contrast, the broad-spectrum caspase inhibitors ZVAD and ZBIOT showed no protection. Similarly, selective inhibitors of caspase-1 (YVAD-CHO), caspase-2 (VDVAD-CHO), caspase-3 (DEVD-CHO) and caspase-8 (IETD-CHO) did not protect against cell damage induced by staurosporine. The protective effect of EGb 761 was not enhanced when coincubated with vitamin E or DEVD-CHO. Caspase-3 activity was maximally induced 5-8 h after staurosporine exposure. Both EGb 761 and vitamin E showed a tendency to decrease caspase-3 activity. In contrast, activation of caspase-1 and caspase-9 was not observed at any of the times studied after STS exposure. Exposure to staurosporine resulted in increased superoxide production that was maximal at 5 h. EGb 761 significantly inhibited superoxide production at short times after staurosporine exposure. Vitamin E and PBN also significantly reduced superoxide production. Results suggest that EGb 761 neuroprotective effect might be mediated by its well-known antioxidant activity, which might also influence caspase-3 activation. Inhibition of capase-3 induced by EGb 761 and vitamin E does not seem to contribute to their observed protective action. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000220813700010 L2 - Alzheimer's disease;apoptosis;caspase;cortical neuron;Ginkgo biloba;Staurosporine;neuroprotection;vitamin E;CEREBELLAR GRANULE NEURONS; INTERLEUKIN-1-BETA CONVERTING-ENZYME; RAT HIPPOCAMPAL-NEURONS; PROGRAMMED CELL-DEATH; NERVE GROWTH-FACTOR; EGB 761 PROTECTS; INDUCED APOPTOSIS; OXIDATIVE STRESS; SUPEROXIDE-DISMUTASE; HYDROXYL RADICALS SO - Brain Research 2004 ;1002(1-2):76-85 11603 UI - 4774 AU - Masterman GJ AU - Cooke DR AU - Berry RF AU - Clark AH AU - Archibald DA AU - Mathur R AU - Walshe JL AU - Duran M AD - Univ Tasmania, Ctr Ore Deposit Res, Hobart, Tas 7001, AustraliaQueens Univ, Dept Geol Sci & Geol Engn, Kingston, ON K7L 3N6, CanadaUniv Arizona, Dept Geosci, Tucson, AZ 85721, USACSIRO, Div Explorat & Min, Bentley, WA 6102, AustraliaCompania Dona Ines Collahuas, Iquique, ChileMasterman, GJ, Bolnisi Gold NL, Calle Diego de Vilchis 3503, Chihuahua 31240, Mexico TI - Ar-40/Ar-39 and Re-Os geochronology of porphyry copper- molybdenum deposits and related copper-silver veins in the Collahuasi District, northern Chile AB - The Rosario and Ujina porphyry Cu-Mo deposits, together with porphyry copper mineralization at the nearby Quebrada Blanca deposit, constitute the third-largest concentration of copper mineralization associated with the Domeyko fault system in northern Chile. At Rosario, fault-hosted Cu-Ag-rich massive sulfide veins are associated with pyrophyllite-alunite-quartz altered rocks. The Rosario massive sulfide veins cut biotitealbite-magnetite, K-feldspar and illite-chlorite altered rocks associated with porphyry-style copper-molybdenum mineralization. Similar massive sulfide veins occur in the La Grande area, 1 to 2 km south of Rosario. Copper ore at Ujina is associated with a K-feldspar-biotite-altered quartz monzonite intrusion. The K-feldspar-biotite assemblage has been overprinted by white mica-chlorite alteration. New geochronologic data presented in this paper constrain the ages of hydrothermal activity in the Rosario and Ujina deposits. The Ar-40/Ar-39 biotite, illite, and alunite dates (at 2sigma error), and a Re-Os molybdenite date (at 0.5% error) are reported for porphyritic rocks and hydrothermal alteration from the Rosario and Ujina mineralized centers. A weighted mean Ar-40/Ar-39 plateau age of 34.4 +/- 0.3 Ma is obtained for igneous biotite in a monzonite porphyry that hosts copper mineralization at the Rosario deposit. Illite and hypogene alunite from separate overprinting alteration events yielded Ar-40/Ar-39 ages of 34.5 +/- 0.5 Ma (plateau age) and 32.6 +/- 0.3 Ma (plateau acre), respectively An Re-Os age of 33.3 +/- 0.2 Ma for molybdenite at Rosario is slightly younger than the Ar-40/Ar-39 age of illite, but older than the alunite. A weighted mean plateau age of 32.7 +/- 1.6 Ma for hypocene alunite from the La Grande Cu-Ag-(Au) vein south of Rosario is indistinguishable from the age of Rosario alunite. At Ujina, the weighted mean 40Ar/39Ar plateau age of igneous biotite for a monzonite intrusion that hosts copper mineralization is 35.2 +/- 0.3 Ma. The monzonite is intruded by postmimeralization porphyry dikes of similar composition, from which igneous biotite yielded a Ar-40/Ar-39 age of 34.7 +/- 0.3 Ma. Igneous biotite in the Rosado Porphyry cooled through its closure temperature during and after the formation of illite, implying that porphyry-style ore and alteration minerals in the Rosario deposit had formed by 34.3 Ma. The age of alunite at Rosaii and La Grande indicate that a second discrete episode of hydrothermal activity was superimposed, 1.8 +/- 0.4 m.y. later, onto the earlier-formed porphyry Cu system. Hydrothertual activity at Ujina is constrained by the Ar-40/Ar-39 ages of igneous biotite in the premineralization and postmineralization intrusions and occurred during a minimum interval of 0.5 +/- 0.4 m.y. The biotite granite at La Profunda, 1.5 km east of Ujina, has a igneous biotite age of 81.2 +/- 2.9 Ma, indicating that this intrusion is unrelated to the mineralized Eocene-Oligocene porphyry intrusions at Ujina, Rosario, and Quebrada Blanca. The Ar-40/Ar-39 data for igneous biotite in the Rosario and Ujina porphyries are cooling ages after multiple hydrothermal events. In most cases, these are minimum hydrothermal ages (i.e., ages of the last high-temperature hydrothermal event to have affected the samples), not magmatic ages. However, the biotite age for the Inca Porphyry is possibly only slightly younger than the intrusion age because biotite has not been affected by later hydrothermal alteration MH - Australia MH - Canada MH - Chile MH - Mexico|Chihuahua MH - USA PB - LITTLETON: ECONOMIC GEOLOGY PUBL CO RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0361-0128 UR - ISI:000223097400002 L2 - MARICUNGA BELT; CU-AU; MINERALIZATION; AGES; ENVIRONMENTS; CHRONOMETER; MAGMATISM SO - Economic Geology and the Bulletin of the Society of Economic Geologists 2004 ;99(4):673-690 11604 UI - 6186 AU - Mastranzo VM AU - Quintero L AU - de Parrodi CA AU - Juaristi E AU - Walsh PJ AD - Univ Amer Puebla, Ctr Invest Quim Biol, Puebla 72820, MexicoUniv Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, MexicoInst Politecn Nacl, Ctr Invest & Estud Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Penn, Dept Chem, Philadelphia, PA 19104, USAWalsh, PJ, Univ Amer Puebla, Ctr Invest Quim Biol, Santa Catarina Martir,Cholula, Puebla 72820, Mexico TI - Use of diamines containing the alpha-phenylethyl group as chiral ligands in the asymmetric hydrosilylation of prochiral ketones AB - Chiral diamines 1-7 were used in the enantioselective hydrosilylation of prochiral aromatic and aliphatic ketones. Some of these ligands combine chiral backbones and chiral N,N'-alpha-phenylethyl substituents that give rise to synergistic effects between these two groups and lead to catalysts that exhibit high enantioselectivity. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000188944400007 L2 - asymmetric reactions;enantioselective hydrosilylation;chiral ligands;chiral auxiliaries;alpha-phenylethylamine;enantioselective reduction;ENANTIOSELECTIVE REDUCTION; REDUCING AGENT; TRANS-1,2-DIAMINOCYCLOHEXANE DERIVATIVES; ENANTIOPURE COMPOUNDS; SECONDARY ALCOHOLS; ORGANIC-SYNTHESIS; DIALKYL KETONES; CATALYST; REAGENTS; BORANE SO - Tetrahedron 2004 ;60(8):1781-1789 11605 UI - 3529 AU - Mata R AU - Morales I AU - Perez O AU - Rivero-Cruz I AU - Acevedo L AU - Enriquez-Mendoza I AU - Bye R AU - Franzblau S AU - Timmermann B AD - Univ Nacl Autonoma Mexico, Dept Farm, Fac Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Illinois, Inst TB Res, Coll Pharm, Chicago, IL 60612, USAUniv Arizona, Dept Pharmacol & Toxicol, Coll Pharm, Tucson, AZ 85721, USAMata, R, Univ Nacl Autonoma Mexico, Dept Farm, Fac Quim, Mexico City 04510, DF, Mexico TI - Antimycobacterial compounds from Piper sanctum AB - Bioassay-guided chromatographic separation of the antimycobacterial extract of the leaves of Piper sanctum afforded 14 new compounds, identified as 2-oxo-12-(3',4'-methylenedioxyphenyl)dodecane (1), 2-oxo-14-(3',4'-methylenedioxyphenyl)tetradecane (2), 2-oxo-16-(3',4'-methylenedioxyphenyl)hexadecane (3), 2-oxo-18-(3',4'-methylenedioxyphenyl)oi-tadecane (4), 2-oxo-14-(3',4'-methylenedioxyphenyt)-trans-13-tetradecene (5), 2-oxo-16-(3',4'-methylenectioxyphenyl)-trans-15-hexadecene (6), 2-oxo-18-(3',4'-methylenedioxyphenyl)-trans-17-octadecene (7), 2-oxo-16-phenyl-trans-3-hexadecene (8), methyl [6-(10-phenyldecanyl)tetrahydropyran-2-yl] acetate (9), methyl 2-(6-tridecyltetrahydro-2H-pyran-2-yl)acetate (10), methyl 2-(5-tetradecyltetrahydro-2-furanyl)acetate (11), 2-oxo-14-(3',4'-methylenedioxyphenyl)-trans-3-tetradecene (12), 2-oxo-16-(3',4'-methyleneilioxyphenyl)-trans-3-hexadecene (13), and 2-oxo-16-phenyl-3-hexadecane (14). In addition, p-eugenol (15), methyleugenol (16), Z-piperolide (17), demethoxyyangonin (18), 5,6-dehydro-7,8-dihydromethysticin (19), cepharanone B (20), piperolactam A (21), cepharadione B (22), N-trans-feruloyltyramine (23), and N-trans-(p-coumaroyl)tyramine (24) were obtained from the anti-TBC stem extract of the plant. GC-MS and HPLC analyses of the essential oils of the leaves and stem revealed that safrol (25) was the major component of the oils. Compounds 2, 3, 6, 18-21, and 24 inhibited the growth of Mycobacterium tuberculosis when tested by the MABA assay, with MIC values ranging from 4 to 64 mug/mL MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000226070600001 L2 - CONSTITUENTS SO - Journal of Natural Products 2004 ;67(12):1961-1968 11606 UI - 3822 AU - Matamoros-Veloza Z AU - Yanangisawa K AU - Rendon-Angeles JC AU - Oishi S AU - Cisneros-Guerrero MA AD - Technol Inst Saltillo, Met Mech Dept, Saltillo 25280, Coahuila, MexicoKochi Univ, Fac Sci, Res Lab Hydrothermal Chem, Kochi 7808520, JapanIPN, Ctr Invest & Estudios Avanzados, Saltillo 25000, Coahuila, MexicoShinshu Univ, Fac Engn, Dept Environm Sci & Technol, Nagano 3808553, JapanMatamoros-Veloza, Z, Technol Inst Saltillo, Met Mech Dept, Saltillo 25280, Coahuila, Mexico TI - Preparation of porous glass-ceramics under different hydrothermal hot pressing conditions AB - Porous glass-ceramics were prepared by conventional firing from compacts prepared by hydrothermal hot pressing of a used glass powder. The effect of hydrothermal hot pressing parameters on the expansion of waste glass powder was investigated by varying the parameters from the standard conditions, at 200 degreesC for 2 h at a constant uniaxial pressure of 20 MPa. A new glass phase was formed in the glass compacts during hydrothermal hot pressing, and water was incorporated into the new phase. The preparation of porous glass ceramic was made by decomposition of the new phase in the compacts, during a conventional heating. A minimum apparent density of 0.40 g/cm 3 was obtained on specimens prepared with low water content (5 wt.%) and medium particle size (39-45 mum). (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0167-2738 UR - ISI:000225139100122 L2 - porous material;recycling;waste glass;hydrothermal hot pressing;cellular hollows SO - Solid State Ionics 2004 ;172(1-4):597-600 11607 UI - 5510 AU - Matamoros-Veloza Z AU - Yanagisawa K AU - Rendon-Angeles JC AU - Oishi S AD - Dept Met Mecan, Inst Tecnol Saltillo, Saltillo 25280, Coahuila, MexicoKochi Univ, Fac Sci, Res Lab Hydrothermal Chem, Kochi 7808520, JapanIPN, Ctr Invest & Estudios Avanzados, Saltillo 25000, Coahuila, MexicoShinshu Univ, Fac Engn, Dept Environm Sci & Technol, Wakasato, Nagano 3808553, JapanMatamoros-Veloza, Z, Dept Met Mecan, Inst Tecnol Saltillo, Saltillo 25280, Coahuila, Mexico TI - The effect of hydrothermal hot-pressing parameters on the fabrication of porous ceramics using waste glass AB - The effect of varying hydrothermal hot-pressing (HHP) parameters on the expansion of waste glass powder was investigated by conventional heat treatment. Glass ceramic porous materials were prepared by hydrothermal hot pressing under standard conditions at 200 degreesC, for 2 h at a constant uniaxial pressure of 20 MPa, while varying experimental variables such as glass particle size, water content, reaction interval, temperature and heating rate. SEM investigation showed the presence of a new glass phase, which incorporated water in its structure. The degree of reactivity attainable between glass particles and water seems to control the expansion process during heating of HHP glass compacts. It was found that the expansion process is independent of experimental parameters such as reaction time, temperature and heating rate, but does depend on the particle size and water content. During the heat treatment, the glass foaming process was preceded by decomposition of the new glass phase in the HHP compacts. A minimum apparent density of 0.40 g cm(-3) was obtained on specimens prepared with low water content (5 wt%) and medium particle size (39-45 mum). X-ray diffraction patterns of the expanded glasses revealed the formation of SiO2 (alpha-cristobalite and quartz) and CaSiO3 (wollastonite) MH - Japan MH - Mexico|Coahuila PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000221320800050 SO - Journal of Physics-Condensed Matter 2004 ;16(14):S1361-S1372 11608 UI - 3504 AU - Mathew X AU - Enriquez JP AU - Romeo A AU - Tiwari AN AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoSwiss Fed Inst Technol, Solid State Phys Lab, Thin Film Phys Grp, CH-8005 Zurich, SwitzerlandUniv Verona, I-37134 Verona, ItalyUniv Loughborough, Dept Elect & Elect Engn, Ctr Renewable Energy Syst & Technol, Loughborough LE11 3TU, Leics, EnglandMathew, X, UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - CdTe/CdS solar cells on flexible substrates AB - The development of CdTe/CdS solar cells on flexible substrates is reviewed in this article. Photovoltaic structures on lightweight and flexible substrates have several advantages over the heavy glass based structures in both terrestrial and space applications. The cells mounted on flexible foil are not fragile, the requirements of the supporting structures are minimum and they can be wrapped onto any suitably oriented or curved structures. The specific power of the solar cells is an important factor in space applications and hence development of photovoltaic devices on light weight substrates is interesting. CdTe is one of the leading candidates for photovoltaic applications due to its optimum band gap for the efficient photo-conversion and robustness for industrial production with a variety of film preparation methods. Flexible solar cells with conversion efficiencies exceeding 11% have been developed on polyimide foils. The development of CdTe devices on metallic substrates is impeded due to the lack of a proper ohmic contact between CdTe and the substrate. The polymer substrate has the advantage that the devices can be prepared in both "superstrate" and "substrate" configurations. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Italy MH - Mexico|Morelos MH - Switzerland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 22 U4 - Energy & Fuels U5 - J;Article AV - English IS - 0038-092X UR - ISI:000226034600019 L2 - CdTe solar cell;flexible substrate;close spaced sublimation;FILMS SO - Solar Energy 2004 ;77(6):831-838 11609 UI - 5452 AU - Mathews NR AU - Miller EL AU - Sebastian PJ AU - Hernandez MM AU - Mathew X AU - Gamboa SA AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Hawaii Manoa, Hawaii Nat Energy Inst, Honolulu, HI 96822, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoSebastian, PJ, UNAM, Ctr Invest Energia, Privada Xochicalco S-N, Temixco 62580, Morelos, Mexico TI - Electrochemical characterization of a-SiC in different electrolytes AB - The electrochemical studies of the PE-CVD prepared a-SiC in acidic, alkaline and neutral electrolytes have been carried out to understand the stability and flat band conditions. The anodic current is low in all the three electrolytes and the material is more stable in H2SO4. The hydrogen evolution reaction is more favored in H2SO4. The flat band potential as well as the open-circuit potential shows a linear dependence on the pH of the solution and the slope of the open-circuit potential/flat band potential vs. pH graph is very close to the theoretical value of 60 mV/pH. The a-SiC is sensitive to the pH of the electrolyte. (C) 2003 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000221586300006 L2 - SiC;a-SiC;electrochemical studies;hydrogen production;cyclic voltammetry;open-circuit potential;SILICON-CARBIDE; PHOTOELECTROCHEMICAL CHARACTERIZATION SO - International Journal of Hydrogen Energy 2004 ;29(9):941-944 11610 UI - 5705 AU - Mathias P AU - Le Contell JM AU - Chapellier E AU - Jankov S AU - Sareyan JP AU - Poretti E AU - Garrido R AU - Rodriguez E AU - Ferro AA AU - Alvarez M AU - Parrao L AU - Pena J AU - Eyer L AU - Aerts C AU - De Cat P AU - Weiss WW AU - Zhou A AD - Observ Cote Azur, Dept Fresnel, UMR 6528, F-06304 Nice 4, FranceOsserv Astron Brera, I-23807 Merate, ItalyInst Astrofis Andalucia, E-18080 Granada, SpainUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUNAM, IA, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoPrinceton Univ Observ, Princeton, NJ 08544, USAKatholieke Univ Leuven, Dept Natuurkunde & Sterrenkunde, B-3001 Louvain, BelgiumUniv Vienna, Inst Astron, A-1180 Vienna, AustriaChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R ChinaMathias, P, Observ Cote Azur, Dept Fresnel, UMR 6528, F-06304 Nice 4, France TI - Multi-site, multi-technique survey of gamma Doradus candidates - I. Spectroscopic results for 59 stars AB - We present the first results of a 2-year high-resolution spectroscopy campaign of 59 candidate gamma Doradus stars which were mainly discovered from the HIPPARCOS astrometric mission. More than 60% of the stars present line profile variations which can be interpreted as due to pulsation related to gamma Doradus stars. For all stars we also derived the projected rotation velocity (up to more than 200 km s(-1)). The amplitude ratios 2K/Deltam for the main HIPPARCOS frequency are in the range 35-96 km s(-1) mag(-1). About 50% of the candidates are possible members of binary systems, with 20 stars being confirmed gamma Doradus. At least 6 stars present composite spectra, and in all but one case (for which only one spectrum could be obtained), the narrow component shows line profile variations, pointing towards an uncomfortable situation if this narrow component originates from a shell surrounding the star. This paper is the first of a series concerning mode identification using both photometric and spectroscopic methods for the confirmed gamma Doradus stars of the present sample MH - Austria MH - Belgium MH - France MH - Italy MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Peoples R China MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000220976100024 L2 - line : profiles;stars : variables : general;stars : oscillations;stars : binaries : spectroscopic;HIPPARCOS EPOCH PHOTOMETRY; DELTA-SCUTI STARS; A-TYPE STARS; SHELL STARS; SPECKLE INTERFEROMETRY; ROTATIONAL VELOCITIES; HR 8799; VARIABLES; CAMPAIGN; DISCOVERY SO - Astronomy & Astrophysics 2004 ;417(1):189-199 11611 UI - 4678 AU - Mathiasen R AU - Flores A AU - Miranda H AU - Cadio L AD - No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011, USACom Nacl Forestal, Nuevo Leon, MexicoMathiasen, R, No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011, USA TI - First report of Arceuthobium vaginatum subsp vaginatum on Pinus pseudostrobus MH - Mexico|Nuevo Leon MH - USA PB - ST PAUL: AMER PHYTOPATHOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;News Item AV - English IS - 0191-2917 UR - ISI:000223279100030 SO - Plant Disease 2004 ;88(9):1046-1046 11612 UI - 5398 AU - Matsuura T AU - Fang P AU - Lin X AU - Khajavi M AU - Tsuji K AU - Rasmussen A AU - Grewal RP AU - Achari M AU - Alonso ME AU - Pulst SM AU - Zoghbi HY AU - Nelson DL AU - Roa BB AU - Ashizawa T AD - Univ Texas, Med Branch, Dept Neurol, Galveston, TX 77555, USABaylor Coll Med, Dept Neurol, Houston, TX 77030, USABaylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030, USABaylor Coll Med, Dept Pediat, Houston, TX 77030, USABaylor Coll Med, Howard Hughes Med Inst, Houston, TX 77030, USAVet Affairs Med Ctr, Houston, TX 77030, USAInst Nacl Neurol & Neurocirug, Dept Neurogenet & Mol Biol, Mexico City, DF, MexicoSeton Hall Univ, New Jersey Neurosci Inst, Edison, NJ, USAUniv Calif Los Angeles, Cedars Sinai Med Ctr, Div Neurol,Burns & Allen Res Inst,Dept Neurol, Rose Moss Lab Parkinson & Neurodegenerat Dis, Los Angeles, CA 90048, USAAshizawa, T, Univ Texas, Med Branch, Dept Neurol, JSA9-128,301 Univ Blvd, Galveston, TX 77555 USA TI - Somatic and germline instability of the ATTCT repeat in spinocerebellar ataxia type 10 AB - Spinocerebellar ataxia type 10 (SCA10) is an autosomal dominant disorder characterized by ataxia, seizures, and anticipation. It is caused by an expanded ATTCT pentanucleotide repeat in intron 9 of a novel gene, designated "SCA10." The ATTCT expansion in SCA10 represents a novel class of microsatellite repeat and is one of the largest found to cause human diseases. The expanded ATTCT repeat is unstably transmitted from generation to generation, and an inverse correlation has been observed between size of repeat and age at onset. In this multifamily study, we investigated the intergenerational instability, somatic and germline mosaicism, and age-dependent repeat-size changes of the expanded ATTCT repeat. Our results showed that (1) the expanded ATTCT repeats are highly unstable when paternally transmitted, whereas maternal transmission resulted in significantly smaller changes in repeat size; (2) blood leukocytes, lymphoblastoid cells, buccal cells, and sperm have a variable degree of mosaicism in ATTCT expansion; (3) the length of the expanded repeat was not observed to change in individuals over a 5-year period; and (4) clinically determined anticipation is sometimes associated with intergenerational contraction rather than expansion of the ATTCT repeat MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 11 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0002-9297 UR - ISI:000221651900014 L2 - DOMINANT CEREBELLAR-ATAXIA; MYOTONIC-DYSTROPHY TYPE-2; UNSTABLE TRIPLET REPEAT; FRAGILE-X-SYNDROME; CGG REPEAT; TRINUCLEOTIDE REPEAT; INTERMEDIATE ALLELES; HUNTINGTONS-DISEASE; MUSCULAR-DYSTROPHY; MOLECULAR ANALYSIS SO - American Journal of Human Genetics 2004 ;74(6):1216-1224 11613 UI - 5583 AU - Matthews-Greer J AU - Dominguez-Malagon H AU - Herrera GA AU - Unger J AU - Chanona-Vilchis J AU - Caldito G AU - Turbat-Herrera EA AD - Louisiana State Univ Hlth Sci, Dept Pathol, Shreveport, LA 71130, USALouisiana State Univ Hlth Sci, Dept Pediat, Shreveport, LA 71130, USALouisiana State Univ Hlth Sci, Dept Obstet & Gynecol, Shreveport, LA 71130, USALouisiana State Univ Hlth Sci, Dept Biometry, Shreveport, LA 71130, USALouisiana State Univ Hlth Sci, Dept Radiol, Shreveport, LA 71130, USAInst Nacl Cancerol, Mexico City, DF, MexicoMatthews-Greer, J, Louisiana State Univ Hlth Sci, Dept Pathol, 1501 Kings Hwy, Shreveport, LA 71130 USA TI - Human papillomavirus typing of rare cervical carcinomas AB - Context.-Most cervical tumors are classified as squamous cell carcinoma or adenocarcinoma, both of which are associated with persistent human papillomavirus (HPV) infection. Although other (rare) types represent less than 5% of all cervical carcinomas, it is necessary that these more unusual tumors be studied in the current era of papillomavirus vaccine development, especially in regions with high incidence of cervical cancer. Objective.-To compare papillomavirus types found in histologically rare cervical carcinomas (n = 29) with those.-types found in common cervical carcinomas (n = 14) archived at the Institute of Cancer in Mexico City, Mexico. Design.-Paraffin-embedded tissues were received and sectioned at the Louisiana State University Health Sciences Center at Shreveport. One section for each block was stained and examined by 2 pathologists. Specific histologies were categorized into 2 broad groups: common (squamous cell carcinoma or adenocarcinoma) or rare (adenosquamous, papillary, villoglandular, anaplastic, transitional, spindle, adenoid basal, colloid, neuroendocrine, and glassy cell carcinomas). Papillomavirus typing results were based on Roche Molecular Systems line-blot assay. Results.-No significant difference was found for dual HPV types (21% of both groups), positivity for HPV-16 (66% of rare tumors and 71% of common tumors), or absence of HPV types 16 or 18, although the rare cancers had a greater tendency toward more unusual HPV types (8/29 rare tumors and 1/14 common tumors had no HPV-16 or HPV-18 DNA). Non-HPV-16/18 types found only in rare tumors included HPV types 52, 84, 26, 35, and 58. Conclusions.-Rare types of cervical carcinoma also are associated with papillomavirus, most with types similar to those found in common cervical neoplasias MH - USA MH - Mexico|Distrito Federal PB - NORTHFIELD: COLLEGE AMER PATHOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Medical Laboratory Technology;Medicine, Research & Experimental;Pathology U5 - J;Article AV - English IS - 0003-9985 UR - ISI:000221211000009 L2 - NUCLEOTIDE-SEQUENCE; HPV INFECTION; HIGH-RISK; PCR; DNA; CANCER; WOMEN; ADENOCARCINOMA; IDENTIFICATION; HYBRIDIZATION SO - Archives of Pathology & Laboratory Medicine 2004 ;128(5):553-556 11614 UI - 4258 AU - Matute E AU - Rosselli M AU - Ardila A AU - Morales G AD - Florida Atlantic Univ, Dept Psychol, Davie, FL 33314, USAUniv Guadalajara, Inst Neurosci, Guadalajara 44430, Jalisco, MexicoFlorida Int Univ, Dept Sci & Commun Disorders, Miami, FL 33199, USARosselli, M, Florida Atlantic Univ, Dept Psychol, 2912 Coll Ave, Davie, FL 33314 USA TI - Verbal and nonverbal fluency in Spanish-speaking children AB - Fluency measures are commonly used in clinical developmental neuropsychology to assess executive functions. Little is known about the effect of age on performance in these tests. This article analyzes the effect of age on measures of verbal (semantic and phonologic) and nonverbal (semantic and nonsemantic) fluency in 171 children (81 boys, 90 girls) between ages 6 and 15. Participants were selected from public and private schools in Guadalajara and Tijuana, Mexico. A significant age effect was found on all tests but no interaction between age and type of test was found. Significant correlations among the 4 fluency tasks ranged from .36 to .46. Results are consistent with the findings of normative studies carried out in other countries and support the cross-language validity of verbal fluency tests MH - USA MH - Mexico|Jalisco PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 9 U4 - Psychology, Developmental;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 8756-5641 UR - ISI:000224191400007 L2 - NEUROPSYCHOLOGICAL TEST BATTERY; FRONTAL-LOBE LESIONS; EXECUTIVE FUNCTIONS; DESIGN FLUENCY; NORMATIVE DATA; ABILITIES; LANGUAGE; AGE; TESTS; ATTENTION SO - Developmental Neuropsychology 2004 ;26(2):647-660 11615 UI - 5832 AU - Maulen-Radovan I AU - Gutierrez-Castrellon P AU - Hashem F AU - Neylan M AU - Baggs G AU - Zaldo X AU - Ndife LI AU - Pollack PF AU - Santosham T AD - Johns Hopkins Univ, Ctr Amer Indian Hlth, Baltimore, MD 21205, USANatl Pediat Inst, Diarrheal Dis Res Unit, Mexico City, DF, MexicoAbbott Labs, Res & Dev & Sci Affairs Dept, Ross Prod Div, Columbus, OH, USAAbbott Labs, Global Pharmaceut Res & Dev, Abbott Pk, IL 60064, USASantosham, T, Johns Hopkins Univ, Ctr Amer Indian Hlth, 615 N Wolfe St,Suite E8132, Baltimore, MD 21205 USA TI - Safety and efficacy of a premixed, rice-based oral rehydration solution AB - The authors compared the safety and efficacy of a ready-to-use, premixed, rice-based oral rehydration solution (R-ORS) with a glucose-based oral rehydration solution (G-ORS), each containing 75 mmol/L sodium, in Mexican children with acute diarrhea for less than 5 days. Methods: One hundred eighty-nine boys 3 to 24 months old admitted to the hospital with acute diarrhea and signs of dehydration were randomly assigned to receive either G-ORS or R-ORS. Intake and output were measured every 3 hours. Results: In the group treated with R-ORS, significantly fewer patients required supplemental intravenous fluids during the rehydration phase compared to the G-ORS group (1% v 8.7%; P < 0.01). Mean stool output, percent weight gain, ORS intake, urine output, and number of patients who vomited during rehydration were similar in the two groups. The mean total stool output after the first 24 hours of maintenance phase was significantly lower in the R-ORS group than in the G-ORS group. Conclusions: The authors found rice-based ORS to be safe, and its use reduced the rate of intravenous fluid therapy in comparison with the use of a glucose-based ORS MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Gastroenterology & Hepatology;Nutrition & Dietetics;Pediatrics U5 - J;Article AV - English IS - 0277-2116 UR - ISI:000220589400007 L2 - acute diarrhea;oral rehydration solution;dehydration;low osmolarity solutions;BLIND CLINICAL-TRIAL; DIARRHEA; GLUCOSE SO - Journal of Pediatric Gastroenterology and Nutrition 2004 ;38(2):159-163 11616 UI - 4008 AU - Maximov SG AU - Kuzmenkov LS AU - Zavala JLG AD - Inst Tecnol Morelia, Morelia 58120, Michoacan, MexicoMoscow MV Lomonosov State Univ, Moscow 119899, RussiaMaximov, SG, Inst Tecnol Morelia, Av Tecnol 1500,Col Lomas Santiaguito, Morelia 58120, Michoacan, Mexico TI - Local equilibrium approach for fermi systems and quantum hydrodynamics AB - The quantum distribution function is derived to reach an accordance with quantum hydrodynamics and to conserve quantum properties of the system. This distribution function, when calculating statistical averages, leads to correct local values of the fundamental physical quantities; and the local conservation laws of the microscopic quantum hydrodynamics can be obtained from such statistics by passing to mathematical expectatives. The equation for the one-particle distribution function generates the many-particle distribution functions. Then, the BBGKY hierarchy equations are obtained. The one-particle statistical operator of a system of fermions in the local equilibrium at arbitrary temperatures is calculated. The dynamics of local hydrodynamic functions (chemical potential, hydrodynamic velocity, and temperature) completely determine the dynamics of the one-particle statistical operator. The quantum hydrodynamic equations for the proton-neutron system at low temperatures are obtained from the equation for one-particle distribution function. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Michoacan MH - Russia PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000224637400002 L2 - quantum hydrodynamics;distribution functions;density matrix;atomic nucleus;MECHANICS SO - International Journal of Quantum Chemistry 2004 ;100(4):311-323 11617 UI - 4009 AU - Maximov SG AU - Kuzmenkov LS AU - Zavala JLG AD - Inst Tecnol Morelia, Morelia 58120, Michoacan, MexicoMoscow MV Lomonosov State Univ, Moscow 119899, RussiaMaximov, SG, Inst Tecnol Morelia, Av Tecnol 1500,Col Lomas Santiaguito, Morelia 58120, Michoacan, Mexico TI - Nonlinear oscillations in the molecular dimer: Asymptotic solutions AB - Nonlinear oscillations in the molecular dimer, composed of two monomers, are investigated, considering an arbitrary number of excitons in the system. The bosonic operators are used to describe the exciton dynamics, that leads to value of the radius of a Bloch sphere that differs from known results. The Hamiltonian of the system is used to reduce the system of equations of motion to a single nonlinear ordinary differential operator equation of the fourth order. Then, the energy of the system is involved in this equation as a parameter. The stability problem is investigated for different energy values. A bifurcation occurs for the energies E > -1/2p. The asymptotic quasiclassical solution for the case E > -1/2p is obtained. The solution contains the number of excitons as a parameter. The quantum solutions can be obtained from the classical solutions using the continual integral technique. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Michoacan MH - Russia PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000224637400003 L2 - molecular dimer;exciton;spin-boson Hamiltonian;asymptotic solutions;evolution operator;QUASI-PARTICLE; DYNAMICS SO - International Journal of Quantum Chemistry 2004 ;100(4):324-335 11618 UI - 2570 AU - May-Arrioja D AU - Likamwa P AU - Selvas-Aguilar R AU - Sanchez-Mondragon J AD - Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816, USAUniv Cent Florida, CREOL, Orlando, FL 32816, USAUniv Cent Florida, FPCE, Orlando, FL 32816, USACtr Invest Opt, Leon 37150, Gto, MexicoInst Nacl Astrofis Opt & Elect, Tonantzintla 7200, Pue, MexicoMay-Arrioja, D, Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816 USA TI - Ultra-compact multimode interference InGaAsP multiple quantum well modulator AB - We propose a new structure for an ultra-compact multimode interference (MMI) InGaAsP multiple quantum well modulator. The operating principle is based on restricting the coupling of the self-image produced by the MMI region into a single mode output waveguide. The key is to excite only the even modes within the MMI region, and this is achieved by operating the MMI waveguide under the condition of restricted symmetric interference. By asymmetrically inducing a phase change of pi along a selected area within the MMI region, mode conversion of all the even modes to odd modes is achieved. Since only the fundamental mode can be coupled to the output waveguide, neither an individual mode, nor any combination of the modes will be coupled, and therefore the injected light is fully attenuated. The modulation characteristics are analyzed using the finite-difference beam propagation method. Extinction ratios as low as -37 dB are demonstrated without electro-absorption effects. For the case of low electro-absorption, which corresponds to a more realistic situation, this value is only increased to -35 dB MH - Mexico|Guanajuato MH - Mexico|Puebla MH - USA PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0306-8919 UR - ISI:000228237400003 L2 - integrated optics;modulator;multimode interference;multiple quantum wells;semiconductors;SWITCHES SO - Optical and Quantum Electronics 2004 ;36(15):1275-1281 11619 UI - 3417 AU - maya-Guerra CA AU - anis-Guzman MG AU - Saldivar SOS AD - Univ Autonoma Neuvo Leon, Fac Ciencias Biol, San Nicolas Garza, Neuvo Leon, SpainInst Tecnol & Estudios Super Monterrey, Dept Food Sci & Technol, Monterrey 64849, Neuvo Leon, MexicoSaldivar, SOS, Univ Autonoma Neuvo Leon, Fac Ciencias Biol, Av Pedro Alba S-N,Cd Univ, San Nicolas Garza, Neuvo Leon, Spain TI - Effects of soybean fortification on protein quality of tortilla-based diets produced from regular and quality protein maize AB - The physiological development of laboratory rats fed with a typical indigenous tortilla diet was Studied for two generations. The experiment compared casein control diet and five different types of diets: (1) a diet of tortillas obtained from fresh masa (FM); (2) regular tortillas produced from enriched dry masa flour containing vitamins B-1, B-2, niacin, folic acid, and the microminerals iron and zinc (REDMF): (3) tortillas produced from enriched dry masa flour fortified with 6% defatted soybean meal (FEDMF); (4) tortillas produced from enriched quality protein maize flour (EQPM); and (5) and, tortillas produced front enriched quality protein maize flour fortified with 3% defatted soybean meal (FEQPM). The growth of rats fed FEDMF and FEQPM diets was significantly higher (P < 0.05) in both generations than their counterparts fed EQPM, REDMF, or FM diet. Animals fed quality protein maize (QPM) tortilla had the highest protein digestibility, but the FEQPM and FEDMF diets had the highest biological Value (BV), net protein utilization (NPU), and protein-digestibility-corrected EAA scores (PDCEAAS). The difference among treatments was more evident in the second-generation rats. The pregnancy rate, number of newborns/litter. litter weight. and newborn survival rate was also higher for rats fed FEDMF, EQPM, and FEQPM diets than their counterparts fed REDMF and FM MH - Mexico|Nuevo Leon MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0921-9668 UR - ISI:000226152000001 L2 - corn tortillas;fortification and enrichment;protein quality and rat growth;quality protein maize;NUTRITIONAL-VALUE; LACTATIONAL PERFORMANCE; RATS; GROWTH; SORGHUM; RESTRICTION; DEFICIENCY; COOKING; ENERGY SO - Plant Foods for Human Nutrition 2004 ;59(2):45-50 11620 UI - 4593 AU - maya-Tapia A AU - Gasaneo G AU - Ovchinnikov S AU - Macek JH AU - Larsen SY AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAUniv Nacl Sur, Dept Fis, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaOak Ridge Natl Lab, Oak Ridge, TN 37831, USATemple Univ, Dept Phys, Philadelphia, PA 19122, USAAmaya-Tapia, A, UNAM, Ctr Ciencias Fis, AP 48-3, Cuernavaca 62251, Morelos, Mexico TI - Integral representation of one-dimensional three particle scattering for delta function interactions AB - The Schrodinger equation, in hyperspherical coordinates, is solved in closed form for a system of three particles on a line, interacting via pair delta functions. This is for the case of equal masses and potential strengths. The interactions are replaced by appropriate boundary conditions. This leads then to requiring the solution of a free-particle Schrodinger equation subject to these boundary conditions. A generalized Kontorovich-Lebedev transformation is used to write this solution as an integral involving a product of Bessel functions and pseudo-Sturmian functions. The coefficient of the product is obtained from a three-term recurrence relation, derived from the boundary condition. The contours of the Kontorovich-Lebedev representation are fixed by the asymptotic conditions. The scattering matrix is then derived from the exact solution of the recurrence relation. The wavefunctions that are obtained are shown to be equivalent to those derived by McGuire. The method can clearly be applied to a larger number of particles and hopefully might be useful for unequal masses and potentials. (C) 2004 American Institute of Physics MH - Argentina MH - Mexico|Morelos MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000223555200008 L2 - SHORT-RANGE POTENTIALS; BODY PROBLEM; RECOMBINATION; COLLISIONS; DYNAMICS; MODEL; ATOMS SO - Journal of Mathematical Physics 2004 ;45(9):3533-3545 11621 UI - 6466 AU - Mayya YD AU - Bressan A AU - Rodriguez M AU - Valdes JR AU - Chavez M AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoOsserv Astron Padova, Vicolo Osservatorio, I-535122 Padua, ItalyScuola Int Super Studi Avanzati, I-34014 Trieste, ItalyMayya, YD, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1,Tonantzintla,Apartado Postal, Puebla 72840, Mexico TI - Star formation history and extinction in the central kiloparsec of M82-like starbursts AB - We report on the star formation histories and extinction in the central kiloparsec region of a sample of starburst galaxies that have similar far-infrared (FIR), 10 mum, and K-band luminosities as those of the archetype starburst M82. Our study is based on new optical spectra and previously published K-band photometric data, both sampling the same area around the nucleus. Model starburst spectra were synthesized as a combination of stellar populations of distinct ages formed over the Hubble time and were fitted to the observed optical spectra and K-band flux. The model is able to reproduce simultaneously the equivalent widths of emission and absorption lines, the continuum fluxes between 3500 and 7000 Angstrom, and the K-band and FIR flux. A good fit requires a minimum of three populations: (1) a young population of age less than or equal to 8Myr, with its corresponding nebular emission, ( 2) an intermediate-age population ( age < 500 Myr), and ( 3) an old population that forms part of the underlying disk or/and bulge population. The birthrate parameter, which is defined as the ratio of the current star formation rate to the average past rate, is found to be in the range 1 - 12. The contribution of the old population to the K-band luminosity depends on the birthrate parameter and remains above 60% in the majority of the sample galaxies. Even in the blue band, the intermediate-age and old populations contribute more than 40% of the total flux in all the cases. A relatively high contribution from the old stars to the K-band nuclear flux is also apparent from the strength of the 4000 &ANGS; break and the Ca II K line. The extinction of the old population is found to be around half that of the young population. The contribution to the continuum from the relatively old stars has the effect of diluting the emission equivalent widths below the values expected for young bursts. The mean dilution factors are found to be 5 and 3 for the Hα and Hβ lines, respectively MH - Italy MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188205600017 L2 - dust, extinction;galaxies : starburst;stars : formation;LUMINOUS INFRARED GALAXIES; OPTICAL SPECTROSCOPY; STELLAR POPULATIONS; INTERMEDIATE-AGE; DUST EXTINCTION; SPIRAL GALAXIES; M82; ULTRAVIOLET; NUCLEAR; EMISSION SO - Astrophysical Journal 2004 ;600(1):188-203 11622 UI - 6178 AU - mazan-Rueda P AU - Schrama JW AU - Verreth JAJ AD - Univ Wageningen & Res Ctr, Dept Anim Sci, Fish Culture & Fisheries Grp, NL-6700 AH Wageningen, NetherlandsCtr Invest Alimentac & Desarrollo AC, Mazatlan, Sinaloa, MexicoAlmazan-Rueda, P, Univ Wageningen & Res Ctr, Dept Anim Sci, Fish Culture & Fisheries Grp, PBO 338, NL-6700 AH Wageningen, Netherlands TI - Behavioural responses under different feeding methods and light regimes of the African catfish (Clarias gariepinus) juveniles AB - Little is known about the behaviour of fish under culture conditions. Several factors may have a direct effect on fish behaviour and its variations during the day. This study assessed the effect of feeding method (continuous by self-feeders vs. twice a day hand-feeding), light intensity (15 vs. 150 1x) and photoperiod [continuous light vs. 12 h darkness and 12 h light (12D:12L)] on behaviour of juvenile African Catfish (Clarias gariepinus). Sixteen aquaria, each with 30 fish (average initial weight of 55 g) were used during a 6-week experimental period. Fish behaviour was recorded by direct observation. Fish were more active under hand-feeding regime than under self-feeding. Fish spent more time swimming under continuous light than under a 12D:12L. Furthermore, the time that fish spent swimming was higher at high light intensity (150 1x) than under low light intensity (15 1x). Aggression was affected by photoperiod and light intensity. Continuous light resulted in 41.6% more scars and wounds than the 1213:12L photoperiod, while high light intensity resulted in 2.46 times more scars and wounds than low light intensity. Fish that spent more time swimming and browsing were more aggressive, and they had more scars and wounds on the body. Fish under the hand-feeding method showed a higher activity during the morning compared to the afternoon. Fish also showed a higher activity before each meal (morning and afternoon meals) than afterwards. These activities were more evident during the mornings. The current study demonstrated that for juveniles of the African catfish, swimming activity and agonistic behaviour are strongly affected by husbandry conditions. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Sinaloa MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000189223600028 L2 - behaviour;African catfish;husbandry conditions;GROWTH; SURVIVAL; CLARIIDAE; INTENSITY; BURCHELL; DENSITY; LARVAE SO - Aquaculture 2004 ;231(1-4):347-359 11623 UI - 3858 AU - Mazenc F AU - Mondie S AU - Niculescu SI AD - INRA, INRIA, Project MERE, UMR Anal Syst & Biometrie, F-34060 Montpellier, FranceCINVESTAV, IPN, Dept Automat Control, Mexico City 07360, DF, MexicoUTC, UMR 6599, CNRS, Heudiasyc, F-60205 Compiegne, FranceMazenc, F, INRA, INRIA, Project MERE, UMR Anal Syst & Biometrie, 34,2 Pl Viala, F-34060 Montpellier, France TI - Global stabilization of oscillators with bounded delayed input AB - The problem of globally asymptotically stabilizing by bounded feedback of an oscillator with an arbitrary large delay in the input is solved. A first solution follows from a general result on the global stabilization of null controllable linear systems with delay in the input by bounded control laws with a distributed term. Next, it is shown through a Lyapunov analysis that the stabilization can be achieved as well when neglecting the distributed terms. It turns out that this main result is intimately related to the output feedback stabilization problem. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Automation & Control Systems;Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6911 UR - ISI:000225050800007 L2 - global stability;oscillator;delay;Razumikhin theorem;LINEAR-SYSTEMS SO - Systems & Control Letters 2004 ;53(5):415-422 11624 UI - 5520 AU - Mazenc F AU - Mondie S AU - Francisco R AD - INRIA, INRA, MERE, UMR Analyze Syst & Biometr, F-34060 Montpellier, FranceCINVESTAV, IPN, Dept Control Autimat, Mexico City, DF, MexicoMazenc, F, INRIA, INRA, MERE, UMR Analyze Syst & Biometr, F-34060 Montpellier, France TI - Global asymptotic stabilization of feedforward systems with delay in the input AB - The problem of globally uniformly asymptotically and locally exponentially stabilizing a family of nonlinear feedforward systems when there is a delay in the input is solved. No limitation on the size of the delay is imposed. Explicit expressions of bounded control laws are determined MH - France MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 5 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000221435700033 L2 - delay;feedforward systems;nonlinear;stabilization;SMALL GAIN THEOREM; TRACKING SO - Ieee Transactions on Automatic Control 2004 ;49(5):844-850 11625 UI - 3565 AU - Mazer SJ AU - Paz H AU - Bell MD AD - Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106, USAUniv Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoMazer, SJ, Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA TI - Life history, floral development and mating system in Clarkia xantiana (Onagraceae): Do floral and whole-plant rates of development evolve independently AB - Autogamously self-fertilizing taxa have evolved from outcrossing progenitors at least 12 times in the annual wildflower genus, Clarkia (Onagraceae). In C. xantiana, individuals of the selfing Subspecies (ssp. parviflora) flower at an earlier age, produce successive flowers more rapidly, and produce flowers that complete their development more rapidly than their outcrossing counterparts (ssp. xantiana). Two hypotheses have been proposed to explain the joint evolution of these whole-plant and individual floral traits. The accelerated life cycle hypothesis proposes that selection favoring a short life cycle in environments with short growing seasons (such as those typically Occupied by parviflora) has independently favored genotypes with early reproduction, synchronous flower production. and rapidly developing, self-fertilizing flowers. The correlated response to selection hypothesis similarly proposes that selection in environments with short growing seasons favors early reproduction, but that rapid floral development and increased selfing evolve as correlated responses to selection due to genetic linkage (or pleiotropy) affecting both whole-plant and floral development. We conducted a greenhouse experiment using maternal families from two field populations of each subspecies to examine covariation between floral and whole-plant traits within and among populations to seek support for either of these hypotheses. Our results are consistent with the accelerated life cycle hypothesis but not with the correlated response to selection hypothesis MH - USA MH - Mexico|Michoacan PB - ST LOUIS: BOTANICAL SOC AMER INC RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences U5 - J;Article AV - English IS - 0002-9122 UR - ISI:000226021700012 L2 - Clarkia;development rate;life history;mating systems;onagraceae;protandry;self-fertilization;ARENARIA-UNIFLORA CARYOPHYLLACEAE; SELF-POLLINATION; REPRODUCTIVE ASSURANCE; TEMBLORIENSIS ONAGRACEAE; GENETIC-STRUCTURE; INBREEDING DEPRESSION; VEGETATIVE TRAITS; OUTCROSSING RATE; POLLEN FLOW; WILD RADISH SO - American Journal of Botany 2004 ;91(12):2041-2050 11626 UI - 4054 AU - Mazumdar A AU - Perez-Lorenzana A AD - McGill Univ, Montreal, PQ H3A 2T8, CanadaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, McGill Univ, 3600 Univ Rd, Montreal, PQ H3A 2T8, Canada TI - Sneutrino condensate as a candidate for the hot big bang cosmology AB - If the inflationary paradigm is correct, then it must create conditions for the hot big bang model with all observed matter, baryons, and the seed perturbations for structure formation. In this paper we propose a scenario where the inflaton energy density is dumped into the bulk in a brane world setup, and all the required physical conditions are created by the right-handed neutrino sector within supersymmetry. The scalar component of the right-handed Majorana neutrino is responsible for generating the scale invariant fluctuations in the cosmic microwave background radiation, reheating the Universe at a temperature T(rh)less than or equal to10(9) GeV and finally generating the lepton/baryon asymmetry n(B)/ssimilar to10(-10) with no lepton/baryon-isocurvature fluctuations MH - Canada MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000224800000043 L2 - PROBE WMAP OBSERVATIONS; INFLATIONARY UNIVERSE; NEUTRINO OSCILLATIONS; EXTRA DIMENSION; BRANE; PERTURBATIONS; LEPTOGENESIS; BARYOGENESIS; ANISOTROPY; CURVATON SO - Physical Review D 2004 ;70(8): 11627 UI - 4990 AU - Mazumdar A AU - Mohapatra RN AU - Perez-Lorenzana A AD - McGill Univ, CHEP, Montreal, PQ H3A 2T8, CanadaUniv Maryland, Dept Phys, College Pk, MD 20742, USAInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, McGill Univ, CHEP, 3600 Univ Rd, Montreal, PQ H3A 2T8, Canada TI - Radion cosmology in theories with universal extra dimensions AB - We discuss the cosmology of models with universal extra dimensions, where the Standard Model degrees of freedom live in a (4 + n)-dimensional brane, with n compact and small extra spatial dimensions. In these models, the simplest way to obtain the conventional four-dimensional Planck scale starting with a low string scale is to also have some larger extra dimensions, where only gravity propagates. In such theories, dimensional reduction generically leads to at least two radion fields, one associated with the total volume of the extra spatial dimensions and the other with the ratio of the sizes of the small and large extra dimensions. In this paper, we discuss the impact of the radion fields on cosmology. We emphasize various aspects of radion physics such as radion coupling to the Standard Model fields, bare and dressed radion masses during inflation, dynamical stabilization of radions during and after inflation, radion decay lifetime and its late dominance in the thermal history of the universe as well as its quantum fluctuations during inflation. We argue that models where the radion plays the role of an inflaton or the inflaton is a brane scalar field run into problems. We then present a successful inflation model with bulk scalar fields that seems to have all the desired properties. We also briefly discuss the possibility of radions as cold dark matter candidate MH - Canada MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 1475-7516 UR - ISI:000222598400005 L2 - cosmology with extra dimensions;inflation;SPACE-TIME DIMENSIONS; SUBMILLIMETER DIMENSIONS; COUPLING UNIFICATION; FUTURE COLLIDERS; INFLATION; PERTURBATIONS; TEV; PARTICLE; GRAVITY; PHYSICS SO - Journal of Cosmology and Astroparticle Physics 2004 ;(6): 11628 UI - 5026 AU - Mazumdar A AU - Perez-Lorenzana A AD - McGill Univ, CHEP, Montreal, PQ H3A 2T8, CanadaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMazumdar, A, McGill Univ, CHEP, 3600 Univ Rd, Montreal, PQ H3A 2T8, Canada TI - Sneutrino condensate source for density perturbations, leptogenesis, and low reheat temperature AB - We bring together some known ingredients beyond the standard model physics that can explain the hot big bang model with the observed baryon asymmetry and also the fluctuations in the cosmic microwave background radiation with a minimal set of assumptions. We propose an interesting scenario where the inflaton energy density is dumped into an infinitely large extra dimension. Instead of the inflaton it is the right handed sneutrino condensate, which is acquiring a nonzero vacuum expectation value during inflation, whose fluctuations are responsible for the density perturbations seen in the cosmic microwave background radiation with a spectral index n(s)approximate to1. The decay of the condensate is explaining the reheating of the Universe with a temperature, T(rh)less than or equal to10(9) GeV, and the baryon asymmetry of order one part in 10(10) with no baryon-isocurvature fluctuations MH - Canada MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000222266100008 L2 - BRANE INFLATION; NEUTRINO OSCILLATIONS; COSMOLOGY; DIMENSIONS; NUCLEOSYNTHESIS; BARYOGENESIS; CONSTRAINTS; MILLIMETER; WMAP SO - Physical Review Letters 2004 ;92(25): 11629 UI - 5798 AU - mbrocio-Cruz P AU - Laval A AU - Rosado M AU - Georgelin YP AU - Marcelin M AU - Comeron F AU - Delmotte N AU - Viale A AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoObserv Astron Marseille, F-13248 Marseille 4, FranceEuropean So Observ, D-85748 Garching, GermanyAmbrocio-Cruz, P, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - The kinematic map of the ionized gas of the supergiant shell LMC SGS 2 AB - A complete kinematic map of much of the supergiant shell LMC SGS 2 has been established by scanning Fabry-Perot observations at Halpha wavelength. We present velocity determinations for this large-diameter supergiant shell. We confirm some motions already observed by other authors in previous local interferometric and spectrographic observations. However, our results give a better insight into the whole kinematics of this supergiant shell because of our complete spatial coverage of the two-dimensional velocities. We find that no global expansion pattern is present in this supergiant shell. On the contrary, we find line-splitting of the velocity profile even outside the filamentary boundaries of LMC SGS2. Indeed, we detect faint Halpha diffuse emission as far as similar to 6' outside the long filaments of the boundary of the supershell, with several velocity components. We also find that the outermost northern filament displays two velocity components ( also contradicting a simple radial expansion of the shell), while the filamentary boundary to the east occasionally has a faint secondary velocity component. Inside the supergiant shell, the diffuse emission at the center of LMC SGS2 is the most coherent, while some interior filaments display two velocity components. The velocity pattern found agrees more with two gas layers seen projected along the same line of sight, with local expansions of small wind bubbles formed by stellar associations inside to LMC SGS2 MH - France MH - Germany MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000220801600019 L2 - ISM : bubbles;ISM : individual (LMC SGS2);ISM : kinematics and dynamics;Magellanic Clouds;methods : observational;LARGE MAGELLANIC CLOUD; H-ALPHA SURVEY; GIANT SO - Astronomical Journal 2004 ;127(4):2145-2153 11630 UI - 4160 AU - McCarthy MA AU - Keith D AU - Tietjen J AU - Burgman MA AU - Maunder M AU - Master L AU - Brook BW AU - Mace G AU - Possingham HP AU - Medellin R AU - Andelman S AU - Regan H AU - Regan T AU - Ruckelshaus M AD - Univ Melbourne, Sch Bot, Parkville, Vic 3010, AustraliaAustralia Res Ctr Urban Ecol, Royal Bot Gardens Melbourne, S Yarra, Vic, AustraliaNew S Wales Natl Parks & Wildlife Serv, Hurstville, NSW, AustraliaSUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794, USAScripps Inst Oceanog, Interamer Trop Tuna Commiss, La Jolla, CA 92037, USANatureServe, Boston, MA 02111, USANo Terr Univ, Key Ctr Trop Wildlife Management, Darwin, NT 0909, AustraliaZool Soc London, Inst Zool, London NW1 4RY, EnglandUniv Queensland, Ctr Ecol, Brisbane, Qld 4072, AustraliaUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Calif Santa Barbara, Natl Ctr Ecol Anal & Synth, Santa Barbara, CA 93101, USANatl Marine Fisheries Serv, NW Fisheries Sci Ctr, Seattle, WA 98112, USAMcCarthy, MA, Univ Melbourne, Sch Bot, Parkville, Vic 3010, Australia TI - Comparing predictions of extinction risk using models and subjective judgement AB - Models of population dynamics are commonly used to predict risks in ecology, particularly risks of population decline. There is often considerable uncertainty associated with these predictions. However, alternatives to predictions based on population models have not been assessed. We used simulation models of hypothetical species to generate the kinds of data that might typically be available to ecologists and then invited other researchers to predict risks of population declines using these data. The accuracy of the predictions was assessed by comparison with the forecasts of the original model. The researchers used either population models or subjective judgement to make their predictions. Predictions made using models were only slightly more accurate than subjective judgements of risk. However, predictions using models tended to be unbiased, while subjective judgements were biased towards over-estimation. Psychology literature suggests that the bias of subjective judgements is likely to vary somewhat unpredictably among people, depending on their stake in the outcome. This will make subjective predictions more uncertain and less transparent than those based on models. (C) 2004 Elsevier SAS. All rights reserved MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 1146-609X UR - ISI:000224482600002 L2 - extinction;population dynamics;population viability analysis;risk assessment;stochasticity;subjective judgement;POPULATION VIABILITY ANALYSIS; CONSERVATION; MANAGEMENT; ACCURACY; STOCHASTICITY; PROBABILITY; RELIABILITY; MEANINGFUL; HEURISTICS; FOREST SO - Acta Oecologica-International Journal of Ecology 2004 ;26(2):67-74 11631 UI - 5150 AU - McDonald DB AU - McIntosh RA AU - Wellings CR AU - Singh RP AU - Nelson JC AD - Univ Sydney, Plant Breeding Inst Cobbitty, Camden, NSW 2570, AustraliaCIMMYT Int, Mexico City 06600, DF, MexicoKansas State Univ, Dept Plant Pathol, Manhattan, KS 66506, USAMcDonald, DB, Univ Sydney, Plant Breeding Inst Cobbitty, Private Bag 11, Camden, NSW 2570, Australia TI - Cytogenetical studies in wheat XIX. Location and linkage studies on gene Yr27 for resistance to stripe (yellow) rust AB - The stripe (yellow) rust resistance gene Yr27 was located in wheat (Triticum aestivum L.) chromosome 2B and shown to be closely linked to the leaf (brown) rust resistance genes Lr13 and Lr23 in the proximal region of the short arm. Gene Yr27 was genetically independent of Lr16, which is distally located in the same arm. While Yr27 was often difficult to score in segregating seedling populations, it is apparently quite effective in conferring resistance to avirulent cultures under field conditions. The occurrence of Yr27 in Mexican wheat germplasm and the current over-dependence on Yr27 for crop protection in Asia are discussed MH - Australia MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000222236000002 L2 - genetic mapping;leaf rust;monosomic analysis;Puccinia striiformis;Puccinia triticina;RFLP;Triticum aestivum;F-SP TRITICI; AUSTRALIA SO - Euphytica 2004 ;136(3):239-248 11632 UI - 3659 AU - Mckane AJ AU - Vazquez F AD - Univ Manchester, Sch Phys & Astron, Theory Grp, Manchester M13 9PL, Lancs, EnglandUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoMcKane, AJ, Univ Manchester, Sch Phys & Astron, Theory Grp, Manchester M13 9PL, Lancs, England TI - Path integrals and fluctuations in irreversible thermodynamics AB - We express the set of stochastic differential equations which describe fluctuations in linear irreversible. thermodynamics in terms of path integrals. The stochastic terms which are added to the linearized macroscopic. equations have a correlation matrix that is singular, which implies that the straightforward formulation of the problem in terms of path integrals fails. We therefore begin by constructing a path-integral representation which is valid whether or not the correlation matrix is singular. We apply this to linearized irreversible thermodynamics, but the technique is designed to be applicable to more general versions of the theory. The approach emphasizes the role of the response and correlation functions as basic elements of the theory, and we calculate these quantities explicitly for the case of density fluctuations in a fluid MH - United Kingdom MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000225689600043 L2 - RECIPROCAL RELATIONS; POTENTIAL BARRIER; ESCAPE RATE; NOISE SO - Physical Review e 2004 ;70(4): 11633 UI - 4028 AU - McLaren VL AU - Kirk CA AU - Poisot M AU - Castellanos M AU - West AR AD - Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandNatl Autonomous Univ Mexico, Fac Quim, Mexico City 04510, DF, MexicoMcLaren, VL, Univ Sheffield, Dept Mat Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England TI - Li+ ion conductivity in rock salt-structured nickel-doped Li3NbO4 AB - Two mechanisms of doping Li3NbO4, which has an ordered, rock salt superstructure, have been established. In the 11 stoichiometric mechanism", the overall cation-to-anion ratio is maintained at 1: 1 by means of the substitution 3Li(+) + Nb5+ --> 4Ni(2+). In the "vacancy mechanism", Li+ ion vacancies are created by means of the substitution 2Li(+) --> Ni2+. Solid solution ranges have been determined for both mechanisms and a partial phase diagram constructed for the stoichiometric join. On the vacancy join, the substitution mechanism has been confirmed by powder neutron diffraction; associated with lithium vacancy creation, a dramatic increase in Li+ ion conductivity occurs with increasing Ni content, reaching a value of 5 x 10(-4) Omega(-1) cm(-1) at 300 degreesC for composition x = 0.1 in the formula Li3-2xNixNbO4. This is the first example of high Li+ ion conductivity in complex oxides with rock salt-related structures MH - United Kingdom MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1477-9226 UR - ISI:000224862600010 L2 - ZR; HF; ELECTROLYTES; SULFATE SO - Dalton Transactions 2004 ;(19):3042-3047 11634 UI - 5908 AU - McQuirter JL AU - Rothenberg SJ AU - Dinkins GA AU - Kondrashov V AU - Manalo M AU - Todd AC AD - Charles R Drew Univ Med & Sci, Dept Oral & Maxillofacial Surg, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Drew Environm Res Ctr, Los Angeles, CA 90059, USANatl Inst Publ Hlth, Ctr Hlth & Populat Res, Cuernavaca 06250, Morelos, MexicoCharles R Drew Univ Med & Sci, Dept Anesthesia, Los Angeles, CA 90059, USACharles R Drew Univ Med & Sci, Dept Surg, Los Angeles, CA 90059, USAMt Sinai Sch Med, Dept Community & Prevent Med, New York, NY, USARothenberg, SJ, Natl Inst Publ Hlth, Ctr Hlth & Populat Res, Ave Univ 655,Sta Ma Ahuacatitlan, Cuernavaca 06250, Morelos, Mexico TI - Change in blood lead concentration up to 1 year after a gunshot wound with a retained bullet AB - The authors studied the time course and prevalence of elevated blood lead concentrations and associated injury- and patient-specific factors during the first year following gunshot injury. They determined blood lead levels at mean time points of 0.3, 3.1, 18.7, 94.5, 188.3, and 349.4 days after injury in a volunteer sample of 451 subjects from a Los Angeles, California, trauma center who sustained a first-time gunshot injury with a retained projectile in 2000-2002. In mixed-model analyses, blood lead levels increased with time postinjury (p < 0.0005) up to 3 months, with number of retained fragments (p < 0.0005), and with increasing age (p < 0.0005). Increased blood lead concentration as a function of fragmentation was approximately 30% higher among subjects who had suffered bone fracture in the torso (p < 0.0005). Subjects with bullets or fragments lodged near bone (p < 0.0005) or near joints (p = 0.032) had higher blood lead levels. Logistic models correctly predicted a blood lead elevation of greater than or equal to20 mug/dl in 81% and 85% of subjects at 3 and 6 months postinjury, respectively. The prevalence of elevated blood lead was 11.8% at 3 months and 2.6% at 12 months. The authors recommend continued surveillance of blood lead levels after gunshot injury for patients with key indicators MH - Mexico|Morelos MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000220484900007 L2 - firearms;lead;lead poisoning;wounds and injuries;wounds, gunshot;BONE-RESORPTION; UNITED-STATES; METABOLISM; POPULATION; PREGNANCY; PRESSURE; EXPOSURE; NHANES; LEVEL SO - American Journal of Epidemiology 2004 ;159(7):683-692 11635 UI - 4666 AU - Meaburn J AU - Boumis P AU - Redman MP AU - Lopez JA AU - Mavromatakis F AD - Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, EnglandNatl Observ Athens, Inst Astron & Astrophys, GR-15236 Athens, GreeceDublin Inst Adv Studies, Sch Cosm Phys, Dublin 2, IrelandUNAM, Inst Astron, Ensenada 22800, Baja California, MexicoUniv Crete, Dept Phys, Iraklion 71003, Crete, GreeceMeaburn, J, Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England TI - Candidates for giant lobes projecting from the LBV stars P Cygni and R 143 AB - Deep, wide-field, continuum-subtracted, images in the light of the Halpha + [N II] 6548 6584 Angstrom and [O II]5007 Angstrom nebular emission lines have been obtained of the environment of the Luminous Blue Variable (LBV) star P Cygni. A previously discovered, receding, nebulous filament along PA 50degrees has now been shown to extend up to 12' from this star. Furthermore, in the light of [O III]5007 Angstrom, a southern counterpart is discovered as well as irregular filaments on the opposite side of P Cygni. Line profiles from this nebulous complex indicate that this extended nebulosity is similar to that associated with middle-aged supernova remnants. However, there are several indications that it has originated in P Cygni and is not just a chance superposition along the same sight-line. This possibility is explored here and comparison is made with a new image of the LBV star R 143 in the LMC from which similar filaments appear to project. The dynamical age of the P Cygni giant lobe of approximate to5 x 10(4) yr is consistent with both the predicted and observed durations of the LBV phases of 50 M. stars after they have left the main sequence. Its irregular shape may have been determined by the cavity formed in the ambient gas by the energetic wind of the star, and shaped by a dense torus, when on the main sequence. The proper motion and radial velocity of P Cygni, with respect to its local environment, could explain the observed angular and kinematical shifts of the star compared with the giant lobe MH - United Kingdom MH - Greece MH - Ireland MH - Mexico|Baja California PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223348300028 L2 - stars : circumstellar matter;LUMINOUS BLUE VARIABLES; SOUTHERN SPECTROPHOTOMETRIC STANDARDS; ECHELLE SPECTROMETER; NEBULAE; TORUS SO - Astronomy & Astrophysics 2004 ;422(2):603-608 11636 UI - 4903 AU - Meaney E AU - Armaganijan D AU - Ruiz A AU - Ramos A AU - Alemao E AU - Yin D AD - Hosp 10 Octubre, Mexico City, DF, MexicoInst Dante Pazzanese Cardiol, Sao Paulo, BrazilUniv Pontificia, Bogota, ColombiaInnoval, Mexico City, DF, MexicoMerck & Co Inc, Whitehouse Stn, NJ, USA TI - Lipid management and factors affecting goal attainment in Latin America MH - Brazil MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Meeting Abstract AV - English IS - 1098-3015 UR - ISI:000221356600314 SO - Value in Health 2004 ;7(3):320-320 11637 UI - 6299 AU - Medel R AU - Vergara E AU - Silva A AU - Kalin-Arroyo M AD - Univ Chile, Fac Ciencias, Dept Ciencias Ecol, Santiago, ChileNatl Autonomous Univ Mexico, Inst Ecol, Mexico City 04510, DF, MexicoUniv Chile, Fac Ciencias, Dept Biol, Santiago, ChileMedel, R, Univ Chile, Fac Ciencias, Dept Ciencias Ecol, Casilla 653, Santiago, Chile TI - Effects of vector behavior and host resistance on mistletoe aggregation AB - Understanding the factors affecting parasite aggregation in natural host populations is one of the central questions in parasite ecology. While different biological mechanisms giving rise to aggregation have been documented in the literature, the role of established parasites in vector attraction, and its importance in determining clumped parasite distributions has received-less attention. In a two-year field study, we evaluated the importance of a bird vector, Mimus thenca (Mimidae), on the aggregation dynamics of the holoparasitic mistletoe, Tristerix aphyllus, on its cactus host, Echinopsis chilensis. Removal of T. aphyllus from cacti decreased the number of visits and the time spent by the bird vector, which resulted in a 3.5-fold lower seed deposition of the mistletoe on experimental hosts than on control hosts. Vector preference, however, was not the only factor affecting aggregation in this system. Spine length of the cactus acted as a first line of defense against parasitism, by discouraging bird perching on top of host columns. While heavily parasitized hosts received more seeds than unparasitized hosts, spines counteracted this effect. These results provide field evidence that parasite aggregation results from the balance between vector behavior and host resistance traits MH - Chile MH - Mexico|Distrito Federal PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000188869000015 L2 - Cactaceae;Chile;host-parasite interaction;Loranthaceae mistletoe;resistance;seed deposition;seed dispersal;tolerance;Tristerix aphyllus;vector-borne disease;TRISTERIX-APHYLLUS LORANTHACEAE; DISEASE DYNAMICS; SEED DEPOSITION; PARASITES; INFECTION; POPULATIONS; DISPERSAL; TOLERANCE; CONSEQUENCES; SELECTION SO - Ecology 2004 ;85(1):120-126 11638 UI - 6039 AU - Medellin-Rodriguez FJ AU - Larios-Lopez L AU - Zapata-Espinoza A AU - valos-Montoya O AU - Phillips PJ AU - Lin JS AD - UASLP, FCQ, CIEP, Mexico City, DF, MexicoUniv Tennessee, MSE Dept, Knoxville, TN 37996, USAOak Ridge Natl Lab, Solid State Div, Oak Ridge, TN 37831, USAMedellin-Rodriguez, FJ, UASLP, FCQ, CIEP, Av Dr Manuel Nava 6, Mexico City, DF, Mexico TI - Melting behavior of polymorphics: Molecular weight dependence and steplike mechanisms in nylon-6 AB - The effect of molecular weight on the isothermal crystallization and complex melting behavior of polymorphic nylon-6 has been studied within the context of the steplike crystallization and melting mechanism. Quiescent isothermal crystallization, at relatively low crystallization temperatures, of low molecular weight nylon-6 samples, although poorly defined, predominantly developed the alpha crystalline form. Linear heating of these samples gave place to a single melting endotherm. An increase in crystallization temperature developed a better-defined a form with the single melting behavior continuing up to temperatures where a small endotherm appeared immediately after the crystallization temperature. A sequential increase of crystallization temperature (paralleled by increased definition of the alpha crystalline form) rendered triple melting behavior. This latter phenomenon was followed by the return of double melting at the expense of the third melting endotherm. after isothermal crystallization at higher temperatures. High molecular weight samples predominantly developed the gamma form at low isothermal crystallization temperatures, the melting behavior giving rise to the formation of a new melting endotherm with melting point slightly lower than the high endotherm previously observed with the low molecular weight sample. In addition, there was also the formation of a lower amount of a third melting endotherm. On the basis of these results, an explanation is given for each melting endotherm. It was also determined that, on heating, nylon-6 can recrystallize from the less stable gamma form to the more stable a form within a process parallel to melting. From a comparison of the crystallization results for different molecular weights, under the stable a crystal habit, it was determined that the basic concepts of the steplike crystallization and melting mechanism can also be applied to the complex melting behavior of the polymorphic nylon-6 MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000220051800022 L2 - X-RAY-SCATTERING; CRYSTAL STRUCTURE; POLY(ETHYLENE-TEREPHTHALATE); TRANSITION; TEMPERATURE; 6-POLYAMIDE; MORPHOLOGY; PHASE SO - Macromolecules 2004 ;37(5):1799-1809 11639 UI - 3177 AU - Medina-Franco JL AU - Canada J AU - Bleriot Y AU - Sinay P AU - Jimenez-Barbero J AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Dept Pharm, Mexico City 04510, DF, MexicoCSIC, Ctr Invest Biol, Madrid, SpainEcole Normale Super, Dept Chim, Paris, France TI - Conformational study of monosaccharide analogues with H-1-NMR, NOE experiments and molecular dynamics MH - France MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223712801015 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U227-U227 11640 UI - 3178 AU - Medina-Franco JL AU - Rodriguez-Morales S AU - Hernandez A AU - Juarez-Gordiano C AU - Jimenez-Barbero J AU - Castillo R AD - Univ Nacl Autonoma Mexico, Dept Pharm, Mexico City 04510, DF, MexicoCSIC, Ctr Invest Biol, Madrid, Spain TI - Ligand-based design of pyridinone derivatives with potential activity against mutant strains of HIV-1 reverse transcriptase MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223712802176 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U523-U523 11641 UI - 3917 AU - Medina-Franco JL AU - Rodriguez-Morales S AU - Juarez-Gordiano C AU - Hernandez-Campos A AU - Jimenez-Barbero J AU - Castillo R AD - CSIC, Ctr Invest Biol, E-28040 Madrid, SpainUNAM, Dep Farm, Fac Quim, CU, Mexico City 04510, DF, MexicoJimenez-Barbero, J, CSIC, Ctr Invest Biol, Velazquez 144, E-28040 Madrid, Spain TI - Flexible docking of pyridinone derivatives into the non-nucleoside inhibitor binding site of HIV-1 reverse transcriptase AB - Potent non-nucleoside reverse transcriptase inhibitors (NNRTIs) of the pyriditione derivative type were docked into nine NNRTIs binding pockets of HIV-1 reverse transcriptase (RT) structures. The docking results indicate that pyridinone analogues adopt a butterfly conformation and share the same binding mode as the crystal inhibitors in the pocket geometries of nevirapine, 1051U91, 9-Cl-TIBO, Cl-alpha-APA, efavirenz, UC-781, and S-1153. The results are in agreement with the data concerning mutational and structure-activity relationships available for pyridinone analogues and aid in the understanding, at the molecular level, of the biological response of published hybrid pyridinone molecules. Strategies to design further pyridinone derivatives active against RT containing mutations are discussed. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Chemistry, Medicinal;Chemistry, Organic U5 - J;Article AV - English IS - 0968-0896 UR - ISI:000225050600007 L2 - AutoDock;binding mode model;mutation;non-nucleoside reverse transcriptase inhibitors;2-PYRIDINONE DERIVATIVES; RESISTANCE MUTATIONS; DRUG-RESISTANCE; ANTIVIRAL ACTIVITY; FORCE-FIELD; WILD-TYPE; DESIGN; ANALOGS; POTENT; RESILIENCE SO - Bioorganic & Medicinal Chemistry 2004 ;12(23):6085-6095 11642 UI - 3708 AU - Medina-Godoy S AU - Nielsen NC AU - Paredes-Lopez O AD - IPN, Unidad Irapuato, Ctr Invest & Estud Avanzados, Dept Biotecnol & Bioquim, Irapuato 36500, Gto, MexicoPurdue Univ, USDA ARS, Dept Agron, W Lafayette, IN 47907, USAParedes-Lopez, O, IPN, Unidad Irapuato, Ctr Invest & Estud Avanzados, Dept Biotecnol & Bioquim, Apartado Postal 629, Irapuato 36500, Gto, Mexico TI - Expression and characterization of a His-tagged 11S seed globulin from Amaranthus hypochondriacus in Escherichia coli AB - DNA encoding a His-tagged 11S globulin from Amaranthus hypochondriacus (amarantin) was successfully expressed in Escherichia coli strains BL21 (DE3) and Origami (DE3) The two strains produced different accumulation patterns. Whereas most of the proamarantin expressed in BL21 (DE3) was localized in inclusion bodies, that produced in Origami (DE3) was soluble (76 mg/L). Sucrose density gradient ultracentrifugation analysis of the expressed soluble proamarantin revealed that the protein was assembled into trimers. Treatment of proamarantin trimers in vitro using purified asparaginyl endopeptidase resulted in the appearance of peptides of the sizes expected for acidic and basic chains. Because the proamarantin assembles into trimers with the expected sedimentation characteristics and is cleaved into acidic and basic chains rather than being degraded, the results suggest that the protein folding occurring in E. coli is similar to that taking place in seeds. The His-tagged proamarantin was purified in a single step by immobilized metal affinity chromatography with a final yield of 48 mg/L. The overexpression of proamarantin in E. coli, together with the one-step purification will facilitate further investigation of this storage protein through site-directed mutagenesis MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 8756-7938 UR - ISI:000225558200018 L2 - STORAGE PROTEINS; POSTTRANSLATIONAL CLEAVAGE; SOYBEAN PROGLYCININ; PURIFICATION; GLYCININ; CLONING; CDNA SO - Biotechnology Progress 2004 ;20(6):1749-1756 11643 UI - 5216 AU - Medina-Gutierrez C AU - Frausto-Reyes C AU - Quintanar-Stephano JL AU - Sato-Berru R AU - Barbosa-Garcia O AD - Ctr Invest & Opt AC, Ags, MexicoUniv Nacl Trujillo, Trujillo, PeruUniv Autonoma Aguascalientes, Ctr Ciencias Bas, Dept Fisiol & Farmacol, Ags, MexicoMedina-Gutierrez, C, Ctr Invest & Opt AC, Unidad Aguascalientes,Constituc 607,CP 20200,Apar, Ags, Mexico TI - Study of the protein distribution in the pig lens cross section by Raman spectroscopy AB - The distribution of proteins in the cross section of a normal pig lens was studied by near-infrared Raman spectroscopy. The Raman spectra were measured in the visual and equatorial axes of this cross section and the protein peak intensities were determined. It was found that along each axis the protein intensities fluctuate. They have a considerable increment along the visual axis with the exception of the C-N bond peak intensities at 1087.2 cm(-1), which decrease, and along the equatorial axis the increment is slight. This increment in protein distribution along the visual axis is related with the refractive gradient of the lens. The classification of pig lens spectra in these axes was performed using principal component analysis (PCA) and linear discriminant analysis (LDA). Cross-validation shows an excellent group separation. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Aguascalientes MH - Peru PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000221893700020 L2 - pig crystalline lens;refractive index;lens proteins;near-infrared Raman spectroscopy SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2004 ;60(7):1573-1577 11644 UI - 5694 AU - Medina-Urrutia V AU - Madera KFL AU - Serrano P AU - Ananthakrishnan G AU - Grosser JW AU - Guo WW AD - Univ Florida, Inst Food & Agr Sci, Dept Hort, Citrus Res & Educ Ctr, Lake Alfred, FL 33850, USAINIFAP, Tecoman 28100, Colima, MexicoHuazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Hebei, Peoples R ChinaGrosser, JW, Univ Florida, Inst Food & Agr Sci, Dept Hort, Citrus Res & Educ Ctr, Lake Alfred, FL 33850 USA TI - New intergeneric somatic hybrids combining amblycarpa mandarin with six trifoliate/trifoliate hybrid selections for lime rootstock improvement AB - No presently available rootstock combines all the available rootstock attributes necessary for efficient long-term citriculture (production and harvesting) of Mexican limes and other commercially important scions. In the present study, somatic hybridization techniques were used to combine the widely adapted Amblycarpa mandarin (also known as Nasnaran mandarin) with six different trifoliate/trifoliate hybrid selections: Benton, Carrizo, and C-35 citranges; Flying Dragon and Rubidoux trifoliate oranges; and a somatic hybrid of sour orange + Flying Dragon. The ultimate goal of this research is to generate polyploid somatic hybrids that express the complementary horticultural and disease resistance attributes of the corresponding parents, and have direct potential as improved tree-size controlling rootstocks. Somatic hybrids from all six parental combinations were confirmed by a combination of leaf morphology, flow cytometry, and randomly amplified polymorphic DNA (RAPD) (for nuclear hybridity) and cleaved amplified polymorphic sequence (CAPS) analyses (for mtDNA and cpDNA). This is the first report of citrus somatic hybridization using Amblycarpa mandarin. Unexpected hexaploid somatic hybrid plants were recovered from the fusion of Amblycarpa mandarin + C-35 citrange. Hexaploid hybrids should be very dwarfing and may have potential for producing potted ornamental citrus. Resulting somatic hybrid plants from all six combinations have been propagated by tissue culture and/or rooted cuttings and are being prepared for commercial field evaluation for their potential as improved rootstocks for Mexican lime and other important scions MH - USA MH - Mexico|Colima MH - Peoples R China PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Horticulture U5 - J;Article AV - English IS - 0018-5345 UR - ISI:000220973800031 L2 - disease resistance;protoplast fusion;tetraploid;tree size control;tissue culture;molecular markers;CITRUS-SINENSIS; MOLECULAR CHARACTERIZATION; CULTIVAR IMPROVEMENT; PONCIRUS-TRIFOLIATA; ORGANELLE GENOMES; HYBRIDIZATION; REGENERATION; PLANTS; ELECTROFUSION; INHERITANCE SO - Hortscience 2004 ;39(2):355-360 11645 UI - 6323 AU - Medina G AU - Vera-Lastra O AU - Barile L AU - Salas M AU - Jara LJ AD - Hosp Especialidades Ctr Med La Raza, Ctr Med Raza, IMSS, Clin Res Unit, Mexico City 02990, DF, MexicoHosp Especialidades Ctr Med La Raza, Ctr Med Raza, Dept Internal Med, Mexico City 02990, DF, MexicoHosp Gen Zona No 76, Mexico City, DF, MexicoHosp Especialidades Ctr Med La Raza, IMSS, Ctr Med Nacl Siglo 21, Clin Res Unit, Mexico City, DF, MexicoCaro Res Inst, Concord, MA, USAJara, LJ, Hosp Especialidades Ctr Med La Raza, Ctr Med Raza, IMSS, Clin Res Unit, Seris & Zaachila S-N, Mexico City 02990, DF, Mexico TI - Clinical spectrum of males with primary antiphospholipid syndrome and systemic lupus erythematosus: a comparative study of 73 patients AB - The objective of this study was to compare the clinical findings, laboratory data, functional outcome and chronic damage in male patients with primary antiphospholipid syndrome (PAPS) and systemic lupus erythematosus (SLE). We studied 29 male patients with PAPS and 44 with SLE. Clinical findings, laboratory data, lupus damage index (SLICC/ACR DI), and functional outcome in PAPS, were analysed in each group. The mean age at diagnosis was 29.8 +/- 10.4 years in patients with PAPS and 26 +/- 10.1 years in SLE patients. The duration of disease was 4.5 +/- 2.6 versus 5.2 +/- 3.8 years in patients with PAPS and SLE, respectively (P = NS). In patients with PAPS the most frequent clinical manifestations were venous thrombosis, thrombocytopenia, and pulmonary thromboembolism. Patients with SLE had joint, skin and renal involvement more frequently than those with PAPS (P = 0.0001). All PAPS patients had anticardiolipin antibodies (aCL), and 14 patients (48%) had lupus anticoagulant (LA). All SLE patients had antinuclear antibodies (ANAs). Anti-dsDNA antibodies were positive in 39% of SLE patients. Five patients died: one with,catastrophic' APS and four with SLE. SLICC/ACR-DI score in SLE patients was 1.9 (SD = 1). In PAPS patients poor functional outcome was due to myocardial intarction, pulmonary thromboembolism, stroke and mesenteric thrombosis. Lupus nephritis was the principal organ damage in SLE. In conclusion, in male patients with PAPS and SLE, the clinical manifestations were significantly different. Arterial thrombosis was the major cause of functional impairment and permanent organ damage in PAPS. Renal involvement was the major cause of chronic damage in SLE MH - Mexico|Distrito Federal MH - USA PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 3 U4 - Rheumatology U5 - J;Article AV - English IS - 0961-2033 UR - ISI:000188689400003 L2 - antiphospholipid syndrome;damage index;functional outcome;males;systemic lupus erythematosus;RHEUMATOLOGY DAMAGE INDEX; LABORATORY FEATURES; RENAL INVOLVEMENT; ANTIBODY SYNDROME; DISEASE; CLASSIFICATION; THROMBOCYTOPENIA; MANIFESTATIONS; ANTICOAGULANT; ASSOCIATION SO - Lupus 2004 ;13(1):11-16 11646 UI - 3217 AU - Medina L AU - Moreno E AD - UNAM, IIMAS, DISCA, Mexico City 1000, DF, MexicoInst Cibernet Matemat & Fis, Havana, CubaMedina, L, UNAM, IIMAS, DISCA, Apdo Postal 20-276 Admon 20, Mexico City 1000, DF, Mexico TI - Ultrasonic imaging system using a 2D envelope beamforming technique: In-homogeneities location AB - An algorithm has been developed to implement synthetic aperture focusing technique for B-scan. This is made at a several transmitter/receiver locations to form a map of ultrasonic reflectivity on the insonified region, considering the path travelled by the ultrasonic pulse from the transducer to the target and back again. To reconstruct the image, a time domain beam-former is applied to the envelope of the detected signals. This method minimizes the side-lobe amplitude and the restriction of lambda/2 distance between two adjacent transducer positions can be neglected without loosing image resolution. The present work is focused on the location of the in-homogeneities, caused by the presence of a phantom immersed in a water tank. The results are presented when the distance between two adjacent transducer positions are varied from 0.5lambda to 2.5lambda showing that the longitudinal resolution is not affected but the lateral resolution becomes poorer when the distance is about 2lambda. The error in the longitudinal location of in-homogeneities is within the minimum detectable distance of the system, while the lateral location error is increased when the distance between any two adjacent transducer positions is larger than 1.5lambda MH - Cuba MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Acoustics;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0218-396X UR - ISI:000226814200005 L2 - synthetic aperture focusing technique;time-domain beam-forming technique;flaws location;ALGORITHMS; FLAWS SO - Journal of Computational Acoustics 2004 ;12(4):571-585 11647 UI - 4311 AU - Medrano-Soto A AU - Moreno-Hagelsieb GM AU - Vinuesa P AU - Christen JA AU - Collado-Vides J AD - UNAM, Ctr Invest Fijac Nitrogeno 1, Program Computat Genom, Cuernavaca, Morelos, MexicoUNAM, Ctr Invest Fijac Nitrogeno 1, Program Mol & Microbial Ecol, Cuernavaca, Morelos, MexicoCtr Invest & Matemat, Dept Probabil & Stat, Guanajuato, MexicoMedrano-Soto, A, Wilfrid Laurier Univ, Dept Biol, Waterloo, ON N2L 3C5, Canada TI - Successful lateral transfer requires codon usage compatibility between foreign genes and recipient genomes AB - We present evidence supporting the notion that codon usage (CU) compatibility between foreign genes and recipient genomes is an important prerequisite to assess the selective advantage of imported functions, and therefore to increase the fixation probability of horizontal gene transfer (HGT) events. This contrasts with the current tendency in research to predict recent HGTs in prokaryotes by assuming that acquired genes generally display poor CU. By looking at the CU level (poor, typical, or rich) exhibited by putative xenologs still resembling their original CU, we found that most alien genes predominantly present typical CU immediately upon introgression, thereby suggesting that the role of CU amelioration in HGT has been overemphasized. In our strategy, we first scanned a representative set of 103 complete prokaryotic genomes for all pairs of candidate xenologs (exported/imported genes) displaying similar CU. We applied additional filtering criteria, including phylogenetic validations, to enhance the reliability of our predictions. Our approach makes no assumptions about the CU of foreign genes being typical or atypical within the recipient genome, thus providing a novel unbiased framework to study the evolutionary dynamics of HGT MH - Canada MH - Mexico|Guanajuato MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0737-4038 UR - ISI:000224013100007 L2 - horizontal gene transfer;codon usage compatibility;comparative genomics;evolution;Bayesian model;ESCHERICHIA-COLI GENOME; MICROBIAL GENOMES; ANTIBIOTIC-RESISTANCE; THERMOTOGA-MARITIMA; BACTERIAL GENOMES; RESPECTIVE CODONS; PROTEIN GENES; TRANSFER-RNAS; EVOLUTION; SEQUENCE SO - Molecular Biology and Evolution 2004 ;21(10):1884-1894 11648 UI - 4695 AU - Meersseman L AU - Verjovsky A AD - Univ Rennes 1, IRMAR, F-35042 Rennes, FranceUNAM, Inst Matemat, Unidad Cuernavaca, Cuernavaca, Morelos, MexicoMeersseman, L, Univ Rennes 1, IRMAR, Campus Beaulieu, F-35042 Rennes, France TI - Holomorphic principal bundles over projective toric varieties MH - France MH - Mexico|Morelos PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0075-4102 UR - ISI:000223252900004 L2 - MANIFOLDS; GEOMETRY SO - Journal fur Die Reine und Angewandte Mathematik 2004 ;572():57-96 11649 UI - 4798 AU - Mehl MJ AU - Aguayo A AU - Boyer LL AU - de Coss R AD - USN, Ctr Computat Mat Sci, Res Lab, Washington, DC 20375, USACtr Invest & Estudios Avanzados, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoGeorge Mason Univ, Sch Computat Sci, Fairfax, VA 22030, USAMehl, MJ, USN, Ctr Computat Mat Sci, Res Lab, Washington, DC 20375, USA TI - Absence of metastable states in strained monatomic cubic crystals AB - A tetragonal, or Bain path, distortion of a metal with an fcc (bcc) ground state toward the bcc (fcc) structure initially requires an increase in energy, but at some point along the Bain path the energy will again decrease until a local minimum is reached. Using a combination of parametrized tight-binding and first-principles linearized augmented plane wave calculations, we show that this local minimum is unstable with respect to an elastic distortion, except in the rare case that the minimum is at the bcc (fcc) point on the Bain path. This shows that body-centered-tetragonal phases of these materials, which have been seen in epitaxially grown thin films, must be stabilized by the substrate and cannot be freestanding films MH - Mexico|Yucatan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000222996300032 L2 - ELASTIC-CONSTANTS; TRANSITION-METALS; MAGIC STRAINS; ENERGY; PHASES; LATTICES; ALUMINUM; TEMPERATURE; SILICON; TI SO - Physical Review B 2004 ;70(1): 11650 UI - 5918 AU - meida-Lenero L AU - de Azcarate JG AU - Cleef AM AU - Trapaga AG AD - Univ Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Proyecto ECOMMEX,Lab Biogeog Dr Alfredo Barrera, Mexico City 04510, DF, MexicoUniv Santiago Compostela, Dept Bot, Escuela Politecn Super, E-27002 Lugo, SpainUniv Amsterdam, Lab Hugo Vries, NL-1098 SM Amsterdam, NetherlandsUniv Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Mexico City 04510, DF, MexicoAlmeida-Lenero, L, Univ Nacl Autonoma Mexico, Dept Biol, Fac Ciencias, Proyecto ECOMMEX,Lab Biogeog Dr Alfredo Barrera, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Plant communities of the zacatonal alpino area of the Popocatepetl and Nevado de Toluca volcanoes in Central Mexico AB - This study of the zacatonal alpino zone of the volcanoes Popocatepetl (5452 in) and Nevado de Toluca (4690 m) in the central region of the Transmexican Volcanic Belt, is a follow-up of the study of ALMEIDA et al. (1994). This tropical alpine zacatonal represents the potential vegetation of the altitudinal belt between 3950 and 4500 in. These altitudinal limits constitute the uppermost limit of Pinus hartwegii forests and the lower limit of the periglacial areas that are almost without vegetation. On both volcanoes a total of 117 vegetation phytosociological relevees were made along the altitudinal gradient. They were clustered according to a classification analysis. The syntaxonomic scheme of the different units is presented and discussed. Special emphasis is given to the association level, aspects such as floristic composition, altitudinal zone, distribution and relation with environmental factors. Syntaxonomically new is the class Drabo jorullensis-Calama-grostietea tolucensis, which includes herbaceous formations dominated by tussock grasses, ground rosettes and cushions growing on Andosols and Lithosols. This class includes the orders Festucetalia lividae (ord. nov.) and Calamagrostietalia tolucensis. The first is located above 4150 m, and colonizes umbric Lithosols; the latter type of grassland, dense zacatonal formations, is present between about 3950 and 4150 m, and preferably on Andosols. The first order includes the alliance Plantagino tolucensis-Festucion lividae (all. nov.). The vegetation of this alliance is distributed on gentle slopes and almost level grounds with intense cryoturbation. This alliance comprises two associations, one of which is the new association Drabo nivicolae-Plantaginetum tolucensis. The pioneer vegetation consists of small tussocks and rosettes, and occurs in zones of colluvial accumulation and wind swept passes. It is restricted to Nevado de Toluca. The second order includes the new alliance Lupinomontani-calamagrostion tolucensis, which comprises the zacatonal associations above the pine transition zones of Pinus hartwegii. One out of four, the newly described association Lupino mexicani-Calamagrostietum tolucensis, is developed on slopes above the upper limit of these pine forests, only at Nevado de Toluca. A total of 22 families, 42 genera and 61 species of vascular plants are presented. The more representative families are Caryophyllaceae, Asteraceae, Brassicaceae y Poaceae; among the genera are: Arenaria, Calamagrostis, Draba, Festuca, Senecio y Trisetum. Among the species with a wide range are: Arenaria bryoides, Calamagrostis tolucensis, Draba jorullensis, Senecio procumbens and Trisetum spicatum. More genera and species are documented from Nevado de Toluca than from Popocatepetl, due to historic-geological, edaphic, topographic and perturbation differences. The physiognomically dominant growth forms are the tussocks. The xerophytic aspect of the alpine vegetation on these volcanoes is determined by low temperatures during the largest part of the year, and by dryness which is reflected by the sheath of dry leaves of the tussocks. There is no arbustive fringe of transition among the sand paths limiting the high monotonous coniferous Pinus hartwegii forest and the "zacatonal alpino" MH - Mexico|Distrito Federal MH - Netherlands MH - Spain PB - STUTTGART: GEBRUDER BORNTRAEGER RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Review AV - Spanish IS - 0340-269X UR - ISI:000220317000004 L2 - zacatonal alpino;altitudinal zonation;plant communities;phytosociology;plant diversity;volcano Popocatepetl;Nevado de Toluca;Mexico;GEOMORPHOLOGIC EVOLUTION; VEGETATION; GUATEMALA; IMPACT SO - Phytocoenologia 2004 ;34(1):91-132 11651 UI - 5393 AU - Meigs JB AU - Williams K AU - Sullivan LM AU - Hunt KJ AU - Haffner SM AU - Stern MP AU - Villalpando CG AU - Perhanidis JS AU - Nathan DM AU - D'Agostino RB AU - D'Agostino RB AU - Wilson PWF AD - Massachusetts Gen Hosp, Gen Internal Med Unit, Div Med Genet, Dept Med, Boston, MA 02114, USAHarvard Univ, Sch Med, Boston, MA 02115, USAMassachusetts Gen Hosp, Ctr Diabet, Dept Med, Boston, MA 02114, USAUniv Texas, Hlth Sci Ctr, Div Clin Epidemiol, Dept Med, San Antonio, TX 78285, USABoston Univ, Dept Math & Stat, Stat & Consulting Unit, Boston, MA 02215, USAAmer British Coudray Hosp, Ctr Estudios Diabet, Mexico City, DF, MexicoInst Mexicano Seguro Social, Hosp Gabriel Mancera, Unidades Invest Med Enfermedades Metab & Epidemio, Mexico City, DF, MexicoWake Forest Univ, Sch Med, Dept Publ Hlth Sci, Winston Salem, NC 27109, USABoston Univ, Sch Med, Framingham, MA, USAFramingham Heart Dis Epidemiol Study, Framingham, MA, USAMeigs, JB, Massachusetts Gen Hosp, Gen Internal Med Unit, Div Med Genet, Dept Med, 50 Staniford St,9th Floor, Boston, MA 02114 USA TI - Using metabolic syndrome traits for efficient detection of impaired glucose tolerance AB - OBJECTIVE - Efficient detection of impaired glucose tolerance (IGT) is needed to implement type 2 diabetes prevention interventions. RESEARCH DESIGN AND METHODS - We assessed the capacity of the metabolic syndrome (MetS) to identify IGT in a cross-sectional analysis of 3,326 Caucasian Framingham Offspring Study (FOS), 1,1.68 Caucasian and 1,812 Mexican-American San Antonio Heart Study (SAHS), 1,983 Mexico City Diabetes Study (MCDS), and 452 Caucasian, 407 MexicanAmerican, and 290 African-American Insulin Resistance Atherosclerosis Study (IRAS) men and women aged 30-79 years who had a clinical examination and an oral glucose tolerance test (OGTT) during 1987-1996. Those with diabetes treatment or fasting plasma glucose greater than or equal to7.0 mmol/l were excluded (MetS was defined by Third Report of the National Cholesterol Education Program's Adult Treatment Panel criteria and IGT as 2-h postchallenge glucose [2hPG] greater than or equal to7.8 mmol/l). We calculated positive (PPV) and negative predictive values (NPV), population attributable risk percentages (PAR%), age- and sex-adjusted odds ratios (ORs), and areas under the receiver operating characteristic curve (AROCs) associated with MetS traits. RESULTS - Among FOS, SAHS, and MCDS subjects, 24-43% had MetS and 15-23% had IGT (including 2-5% with 2hPG greater than or equal to 11.1 mmolA). Among those with MetS, OR for IGT were 3-4, PPV were 0.24-0.41, NPV were 0.84-0.91, and PAR% were 30-40%. Among subjects with MetS defined by impaired fasting glucose (IFG) and any two other traits, OR for IGT were 9-24, PPV were 0.62-0.89, NPV were 0.78-0.87, and PAR% were 3-12%. Among IRAS subjects, 24-34% had MetS and 37-41% had IGT. Among those with MetS, ORs for IGT were 3-6, PPVs were 0.57-0.73, and NPVs were 0.67-0.72. In logistic regression models, IFG, large waist, and high triglycerides were independently associated with IGT (AROC 0.71-0.83) in all study populations MH - USA MH - Mexico|Distrito Federal PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 17 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000221690700027 L2 - TYPE-2 DIABETES-MELLITUS; CORONARY HEART-DISEASE; SAN-ANTONIO HEART; CARDIOVASCULAR RISK-FACTORS; DIAGNOSTIC-CRITERIA; INSULIN-RESISTANCE; FASTING GLUCOSE; MEXICO-CITY; LIFE-STYLE; POPULATION SO - Diabetes Care 2004 ;27(6):1417-1426 11652 UI - 4426 AU - Meinzen-Derr JK AU - Guerrero AL AU - Altaye M AU - Ruiz-Palacios GA AU - Morrow AL AD - Childrens Hosp, Med Ctr, Cincinnati, OH 45229, USA. Inst Nacl Ciencias Med & Nutr, Mexico City, DF, Mexico TI - Duration of exclusive breastfeeding and risk of anemia in a cohort of Mexican infants MH - Mexico|Distrito Federal MH - USA T3 - PROTECTING INFANTS THROUGH HUMAN MILKAdvances in experimental medicine and biology PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - IN FILE U4 - Medicine, Research & Experimental U5 - S;Article NT - SEnglishArticleardythe.morrow@cchmc.org1233 SPRING ST, NEW YORK, NY 10013 USAADVAN EXPERIMENT MED BIOLBAU75 AV - English IS - 0065-2598 UR - ISI:000223641000046 SO - 2004 ;():395-398 11653 UI - 6609 AU - Mejia-Gervacio S AU - Hounsgaard J AU - az-Munoz M AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Neurobiol Celular & Mol, Juriquilla, Queretaro, MexicoUniv Copenhagen, Panum Inst, Dept Med Physiol, DK-2200 Copenhagen N, DenmarkMejia-Gervacio, S, Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Neurobiol Celular & Mol, Apartado Postal 1-1141, Juriquilla, Queretaro, Mexico TI - Roles of ryanodine and inositol triphosphate receptors in regulation of plateau potentials in turtle spinal motoneurons AB - Generation of plateau potentials in spinal motoneurons depends on activation of voltage sensitive L-type Ca2+ channels. These channels are facilitated by metabotropic receptors known to promote release of Ca2+ from intracellular stores. The aim of this study is to determine if Ca2+-release receptors in the endoplasmic reticulum (ER) that are sensitive to ryanodine (RyRs) and to inositol triphosphate receptors (Ip(3)Rs) contribute to the generation of plateau potentials. The effects of antagonists to RyRs, IP(3)Rs and phospholipase C (PLC) were tested on discharge patterns associated with plateau potentials in motoneurons in slices from the spinal cord of the turtle. Plateau-related discharge patterns, un-facilitated or facilitated by agonists for group I glutamate metabotropic receptors, muscarine-sensitive cholinergic receptors or L-type Ca2+ channels were inhibited by blockade of RyRs. In contrast, antagonists of IP(3)Rs or PLC preferentially inhibited plateau-related discharge patterns when facilitated by activation of metabotropic receptors but in only half of the cells when promoted in the absence of metabotropic facilitators. Our findings show that RyRs and IP(3)Rs regulate the generation of plateau potentials in motoneurons and suggest that RyRs may be directly involved with activation of the plateau potential. (C) 2003 Published by Elsevier Ltd on behalf of IBRO MH - Denmark MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000187584300013 L2 - spinal cord;Ca2+ microdomain;intracellular release receptors;MUSCLE SARCOPLASMIC-RETICULUM; RAT HIPPOCAMPAL-NEURONS; CENTRAL-NERVOUS-SYSTEM; CA2+ CHANNELS; RESPONSE PROPERTIES; ALPHA-MOTONEURONES; CALCIUM-CHANNELS; SKELETAL-MUSCLE; DORSAL-HORN; FACILITATION SO - Neuroscience 2004 ;123(1):123-130 11654 UI - 5148 AU - Mejia-Ospino E AU - Garcia G AU - Guerrero A AU - Alvarez I AU - Cisneros C AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoUniv Ind Santander, Lab Espectroscopia Atom & Mol, Bucaramanga, ColombiaMejia-Ospino, E, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Apdo Post 48-3, Cuernavaca 62210, Morelos, Mexico TI - High resolution multiphoton ionization and dissociation of acetone via 3s <- n Rydberg transitions AB - Measurements of multiphoton ionization and dissociation of acetone are reported in the wavelength range 582.60-585.80 nm at photon energy resolution of 0.3 cm(-1). To our knowledge there are not available results of (3 + 2) REMPI on acetone at 0.01 nm in this region. The experiments were performed using an Nd: YAG-OPO (optical parametric oscillator) laser system coupled to time-of-flight mass spectrometer. The ion yield and the single ion channel are presented. The high-resolution three-photon resonance multiphoton spectrum of the acetone 3s <-- nRydberg transition is also reported. The experimental results show three dissociation channels of the acetone ion, leading to the products: (CH3CO (+) ), (CH3 (+) ) and (COH (+) ); the channel CH3COCH3+ --> CH3CO+ + CH3 being the most favored. The acetone and acetyl ions are observed in all wavelength range investigated. In addition, we have measured the origin of the 3s <-- n and 4s <--n transitions, and vibrational bands of the 3s state MH - Colombia MH - Mexico|Morelos PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000222248200018 L2 - MASS-SPECTROMETRY; 355 NM; STATES; TIME; SPECTROSCOPY; ACETALDEHYDE; FORMALDEHYDE; ASSIGNMENTS; SPECTRUM; DYNAMICS SO - European Physical Journal D 2004 ;30(1):149-153 11655 UI - 3656 AU - Mejia F AU - Palmieri M AU - Oropeza C AU - Doyle M AU - Harrison N AU - Aguilar E AU - Narvaez M AU - Estrada R AU - Ortiz G AD - Univ Valle Guatemala, Guatemala City, GuatemalaCtr Invest Cient Yucatan, Merida, Yucatan, MexicoPan Amer Coll Agr, Zamorano, HondurasUniv Florida, Ft Lauderdale Res & Educ Ctr, Ft Lauderdale, FL 33314, USAMinist Agr Ganaderia & Alimentac, Guatemala City, GuatemalaMejia, F, Univ Valle Guatemala, Guatemala City, Guatemala TI - First report of coconut lethal yellowing disease in Guatemala MH - Guatemala MH - Honduras MH - Mexico|Yucatan MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Editorial Material AV - English IS - 0032-0862 UR - ISI:000225748100019 SO - Plant Pathology 2004 ;53(6):800-800 11656 UI - 4150 AU - Mel'nikov VG AU - Velasko RHF AU - Dobrovinskaya OR AD - Univ Colima, Ctr Biomed Studies, Mexico City, DF, MexicoUniv Colima, Fac Med, Mexico City, DF, MexicoRussian Univ Peoples Friendship, Dept Microbiol, Moscow, RussiaDobrovinskaya, OR, Univ Colima, Ctr Biomed Studies, Mexico City, DF, Mexico TI - Suppression of growth and metastasizing of T-Cell lymphoma in mice infected with American trypanosomiasis at different stages of experimental infection AB - Antitumor activity of Trypanosoma cruzi CH4 strain isolated in Mexico was studied. This parasite is not tumoritropic, but inhibits the growth and metastasizing of solid L5178Y-R lymphoma transplanted to Balb/C mice. Conditioned medium from cell cultures infected with this strain produced a cytostatic effect. Possible mechanisms of this phenomenon are discussed MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: CONSULTANTS BUREAU RP - NOT IN FILE U3 - TC 2 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0007-4888 UR - ISI:000224520200017 L2 - Trypanosoma cruzi;L5178Y-R lymphoma;antitumor activity;CRUZI SO - Bulletin of Experimental Biology and Medicine 2004 ;137(5):475-478 11657 UI - 5532 AU - Melendez-Ramirez V AU - Parra-Tabla V AU - Kevan PG AU - Ramirez-Morillo I AU - Harries H AU - Fernandez-Barrera M AU - Zizumbo-Villareal D AD - Univ Autonoma Yucatan, FMVZ, Dept Zool, Dept Ecol, Merida, Yucatan, MexicoCtr Invest Cientifica Yucatan, Dept Recursos Nat, Merida 97310, Yucutan, MexicoUniv Guelph, Dept Environm Biol, Guelph, ON N1G 2W1, CanadaMelendez-Ramirez, V, Univ Autonoma Yucatan, FMVZ, Dept Zool, Dept Ecol, Ap Postal 4-116 Itzimna, Merida, Yucatan, Mexico TI - Mixed mating strategies and pollination by insects and wind in coconut palm (Cocos nucifera L. (Arecaceae)): importance in production and selection AB - 1 Coconut is one of the most important tropical crops. It is threatened by Lethal yellowing disease. Production and selection by breeding require pollination, yet little is known of the pollination requirements and breeding system of this palm. 2 This study was carried out from 1999 to 2001 in coconut plantations represented by five coconut ecotypes commonly found in Mexico. It is the first Study in the Neotropics on pollination and the breeding system of this paint. 3 Hymenoptera were the most numerous and diverse visitors to coconut flowers. The greatest period of insect abundance Occurred during the rainy season (July to October). Insect abundance on the flowers correlated highly and positively with precipitation. 4 The abundance of visitors to pistillate flowers did not vary with season but there were significant differences between palm ecotypes; the most insect-visited flowers were of the Atlantic Tall ecotype. 5 The introduced honeybee (Apis mellifera) had the most appropriate foraging behaviour, visiting both pistillate and staminate flowers. These insects were probably the most efficient pollinators as they carry pollen on their ventral surface. Ants were present on flowers day and night but had no effect on pollination. 6 Pollination experiments indicated a mixed mating strategy: self-pollination by geitenogamy produced almost 19% of the fruit set, but cross-pollination (xenogamy) was the most important contribution (c. 30%). Anemophilous cross-pollination only accounted for 10% of fruit set, whereas entomophily became the most important pollination mechanism under Yucatan conditions. 7 As coconut palm grows naturally on the oceanic strand in a wide variety of seasonal conditions of wind and rain, we suggest that they may have evolved pollination, breeding and mating systems that ensure fruit production under a wide variety of conditions, while maximizing the probability of cross-pollination MH - Canada MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 1461-9555 UR - ISI:000221413300009 L2 - Apis mellifera;coconut palm;mating strategy;Mexico;pollination;Yucatan;STINGLESS BEES SO - Agricultural and Forest Entomology 2004 ;6(2):155-163 11658 UI - 5427 AU - Melendez AM AU - Drogoul A AU - Viel PE AD - INAOE, Puebla 72840, Mexico. UPMC, LIP6, F-72552 Paris 05, France TI - Collective behavior as assembling of spatial puzzles AB - This paper describes how collective behavior can be achieved using simple mechanisms based on local information and low-level cognition. Collective behavior is modeled and analyzed from the spatial point of view. Robots have a set of internal tendencies, such as association and repulsion, that enable them to interact with other robots. Each robot has a space around its body that represents a piece of the puzzle. The robots' goal is to find other pieces of the puzzle, associate with them and remain associated for as long as possible. Experiments on queuing using this puzzle-like mechanism are analyzed MH - France MH - Mexico|Puebla T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlemunoz@inaoep.mx alexis.drogoul@lip6.fr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600093 L2 - collective robotics;spatial coordination;proxemics SO - 2004 ;():901-910 11659 UI - 5831 AU - Melin J AU - Aparicio F AU - Subramanian V AU - Galvan M AU - Chattaraj PK AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCent Leather Res Inst, Chem Lab, Madras 600020, Tamil Nadu, IndiaIndian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, IndiaChattaraj, PK, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, AP POSTAL 55-534, Mexico City 09340, DF, Mexico TI - Is the Fukui function a right descriptor of hard-hard interactions? AB - To verify whether the maximum or the minimum Fukui function site is better for protonation reactions or an altogether different local reactivity descriptor, viz., the charge is necessary, we calculate the Fukui functions (using a finite-difference approximation as well as a frozen-core approximation) and charges (Mulliken, Hirshfeld, and natural population analysis schemes) of several hydroxylamine derivatives, their sulfur-containing variants, and amino acids using B3LYP/6-311 G(d,p) technique. While the Fukui functions provide the wrong selectivity criterion for hard-hard interactions, the charges are found to be more reliable, vindicating Klopman's idea. It is transparent from the present results that the hard-hard interactions are better explained in terms of charges, whereas the Fukui functions can properly account for soft-soft interactions known to be frontier-controlled MH - India MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 27 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000220524300019 L2 - FRONTIER-ELECTRON THEORY; CHEMICAL-REACTIVITY; ATOMIC CHARGES; ORBITAL THEORY; DENSITY; PRINCIPLE; MOLECULES; INDEXES; MOMENTS SO - Journal of Physical Chemistry A 2004 ;108(13):2487-2491 11660 UI - 3413 AU - Mencer DE AU - Hossain MA AU - Schennach R AU - Grady T AU - McWhinney H AU - Gomes JAG AU - Kesmez M AU - Parga JR AU - Barr TL AU - Cocke DL AD - Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710, USAWilkes Univ, Dept Chem, Wilkes Barre, PA 18776, USAPrairie View A&M Univ, Dept Chem, Prairie View, TX 77446, USAInst Technol Saltillo, Dept Met & Mat Sci, Saltillo 25000, Coahuila, MexicoUniv Wisconsin, Dept Mat, Milwaukee, WI 53201, USACocke, DL, Lamar Univ, Gill Chair Chem & Chem Engn, POB 10022, Beaumont, TX 77710 USA TI - On the surface analysis of copper oxides: the difficulty in detecting Cu3O2 AB - The existence Of Cu3O2, a gross defect structure of Cu2O, has been documented experimentally since the early 1960s. However, discussions of the oxidation of copper often neglect the importance of this phase; in fact, it is often omitted entirely from such discussions. This results from the difficulty in determining the chemical state during sputter depth profiling and relying on techniques that have difficulty providing chemical state information. The occurrence of sputter reduction during the depth profiling of copper oxide layers has been demonstrated with XPS depth profiles on a series of copper samples oxidized, for varying lengths of time, in air Lit a temperature of either 423 or 523 K. Under these conditions, a thin layer of CuO/Cu(OH)(2) terminates the oxide layers. Beneath this layer, the presence Of Cu3O2 is expected on the samples prepared at 423 K. However, immediately upon the beginning of sputtering, only Cu1+ is detected in the oxide layers. A zone of constant Cu:O ratio of (approximately similar to1.5) is found throughout most of the oxide layer even though Cu2+ is not detected. On the samples prepared at 523 K, the presence of CuO is anticipated. However, Cu2+ is not detected after sputtering is initiated and a region of constant Cu:O ratio of ca. 1.5 is detected. The inherent difficulties involved in investigating oxide layer growth and vertical oxide layer structure using sputter depth profiling are discussed in light of this experimental data. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Coahuila MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000226269700005 L2 - sputter reduction;XPS;copper;Cu3O2;oxidation;AR+ ION-BOMBARDMENT; COMPOSITIONAL CHANGES; TEMPERATURE OXIDATION; FILMS; XPS; SPECTROSCOPY; REFLECTION; ABSORPTION; CUO SO - Vacuum 2004 ;77(1):27-35 11661 UI - 5113 AU - Menchaca JL AU - Flores H AU - Cuisinier F AU - Perez E AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Autonoma San Luis Potosi, Fac Estomatol, San Luis Potosi, MexicoUniv Strasbourg 1, Federat Rech Odontol, INSERM, U595, F-67085 Strasbourg, FranceMenchaca, JL, Univ Autonoma San Luis Potosi, Inst Fis, Alvaro Obregon 64, San Luis Potosi, Mexico TI - Self-assembled polyelectrolyte nanorings observed by liquid-cell AFM AB - Self-assembled polyelectrolyte nanorings formed by polyelectrolytes are presented for the first time in this work. They are formed by poly(ethylenimine) (PEI) and poly(sodium 4-styrenesulfanate) (PSS) during the two first steps of the formation of the self-assembled polyelectrolyte films (SAPFs). These are formed on a negatively charged glass surface and observed by an in situ liquid-cell AFM technique, which has recently been introduced as an alternative technique to follow polyelectrolyte multilayer formation without drying effects (Menchaca et at 2003 Colloids Surf A 222 185). Nanoring formation strongly depends on the preparation method and parameters such as polyelectrolyte filtration, air and CO2 presence during SAPFs formation and buffer solution. A necessary condition to obtain nanorings is that polyelectrolyte solutions have to be filtered prior to injection into the liquid-cell AFM. The outer diameter of nanorings can be varied from hundreds of nanometres to microns by changing these parameters. Nanorings are stable in the liquid cell for hours but they disappear on contact with air. Additionally, carbonate ions seem to be mainly responsible for the formation of this novel structure MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000222194000010 L2 - ATOMIC-FORCE MICROSCOPY; MULTILAYER FILMS; CONDENSATION; NANOTUBES; SURFACE SO - Journal of Physics-Condensed Matter 2004 ;16(22):S2109-S2117 11662 UI - 6447 AU - Mendez-Toss M AU - Griffin DD AU - Calva J AU - Contreras JF AU - Puerto FI AU - Mota F AU - Guiscafre H AU - Cedillo R AU - Munoz O AU - Herrera I AU - Lopez S AU - Arias CF AD - UNAM, Inst Bacteriol, Cuernavaca 62250, Morelos, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHosp Infantil Mexico Dr Federico Gomez, Dept Med Comunitaria & Hidratac Oral, Mexico City, DF, MexicoInst Mexicano Seguro Social, Mexico City, DF, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Monterrey, Nuevo Leon, MexicoUniv Autonoma Yucatan, Ctr Invest Reg Hideyo Noguchi, Merida, Yucatan, VenezuelaUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi, MexicoArias, CF, UNAM, Inst Bacteriol, AP 510-3,Colonia Miraval, Cuernavaca 62250, Morelos, Mexico TI - Prevalence and genetic diversity of human astroviruses in Mexican children with symptomatic and asymptomatic infections AB - The prevalence and type diversity of human astroviruses (HAstV) in children with symptomatic and asymptomatic infections were determined in five localities of Mexico. HAstV were detected in 4.6 (24 of 522) and 2.6% (11 of 428) of children with and without diarrhea, respectively. Genotyping of the detected strains showed that at least seven (types I to 4 and 6 to 8) of the eight known HAstV types circulated in Mexico between October 1994 and March 1995. HAstV types I and 3 were the most prevalent in children with diarrhea, although they were not found in all localities studied. HAstV type 8 was found in Mexico City, Monterrey, and Merida; in the last it was as prevalent (40%) as type 1 viruses, indicating that this astrovirus type is more common than previously recognized. A correlation between the HAstV infecting type and the presence or absence of diarrheic symptoms was not observed. Enteric adenoviruses were also studied, and they were found to be present in 2.3 (12 of 522) and 1.4% (6 of 428) of symptomatic and asymptomatic children, respectively MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Nuevo Leon MH - Mexico|San Luis Potosi MH - Venezuela PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000188121800024 L2 - POLYMERASE CHAIN-REACTION; MOLECULAR EPIDEMIOLOGY; ACUTE GASTROENTERITIS; REVERSE TRANSCRIPTION; VIRAL DIARRHEA; ROTAVIRUS; GENOME; REGION; JAPAN; VP4 SO - Journal of Clinical Microbiology 2004 ;42(1):151-157 11663 UI - 3207 AU - Mendez-Tovar LJ AU - Mondragon-Gonzalez R AU - Vega-Lopez F AU - Dockrell HM AU - Hay R AU - Lopez-Martinez R AU - Manzano-Gayosso P AU - Hernandez-Hernandez F AU - Padilla-Desgarennes C AU - Bonifaz A AD - Hosp Especialidades Ctr Med La Raza, Unidad Invest Med Dermatol & Micol, Ctr Med Nacl Siglo 21, IMSS, Mexico City, DF, MexicoMiddlesex Hosp, Dept Dermatol, London, EnglandLondon Sch Hyg & Trop Med, Immunol Unit, London WC1, EnglandGuys Hosp, Dept Dermatol, London SE1 9RT, EnglandUNAM, Fac Med, Lab Micol Med, Mexico City, DF, MexicoCtr Dermatol Ladislao Pascua, Mexico City, DF, MexicoHosp Gen Mexico City, Lab Micol Med, Serv Dermatol, Mexico City, DF, MexicoMendez-Tovar, LJ, Apartado Postal A-032,CSPI Coahuila, Mexico City 06703, DF, Mexico TI - Cytokine production and lymphocyte proliferation in patients with Nocardia brasiliensis actinomycetoma AB - IFN-gamma, TNF-alpha, IL-4, IL10 and IL-12 concentrations in the supernatant of peripheral blood mononuclear cell (PBMC) cultures and the in vitro proliferation of PBMC were studied in 25 patients with actinomycetoma caused by Nocardia brasiliensis and in 10 healthy controls from endemic zones. Cell cultures were stimulated by a N. brasiliensis crude cytoplasmic antigen (NB) and five semi-purified protein fractions (NB2, NB4, NB6, NB8, and NB10) separated by isoelectric. Phytohemagglutinin (PHA) and purified protein derivative (PPD) of Mycobacterium tuberculosis were used as control antigens. Skin tests were performed by injecting 0.1 ml of candidin and PPD intradermally (ID). Patients showed a poor response to tuberculin, while their response to candidin was more than two fold greater than that observed in the controls. Cell proliferation showed no statistically significant differences in either group. IFN-gamma production was higher in the healthy controls than in the patients, whereas TNF-alpha secretion was slightly higher in the patients' cultures. IL-4 was detected in the patients' cultures but not in the controls. IL-10 and IL-12 were present at low concentrations in both groups. These results suggest that patients with actinomycetoma show normal antigen recognition, but with low IFN-gamma production, and higher concentrations of IL-4, IL-10 and TNF-a in the patients' PBMC cultures, indicating that they probably have a Th2 type of immune response MH - United Kingdom MH - Mexico|Distrito Federal PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0301-486X UR - ISI:000226727000002 L2 - actinomycetoma;cytokines;lymphocyte proliferation;Nocardia brasiliensis;MICE; RESISTANCE; INFECTION; RESPONSES; MYCETOMA; LEPROSY; INTERLEUKIN-10; ANTIGENS SO - Mycopathologia 2004 ;158(4):407-414 11664 UI - 3661 AU - Mendez ER AU - Leskova TA AU - Maradudin AA AU - Munoz-Lopez J AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Irvine, Dept Phys, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USAMendez, ER, Univ Nacl Autonoma Mexico, Inst Fis, Ciudad Univ,Apartado Postal 20-362, Mexico City 01000, DF, Mexico TI - Design of two-dimensional random surfaces with specified scattering properties AB - A method is proposed for designing a two-dimensional randomly rough Dirichlet surface that, when illuminated at normal incidence, scatters a scalar plane wave with a specified angular distribution of its intensity. The method is validated by computer simulation calculations. (C) 2004 Optical Society of America MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000225682900028 L2 - CIRCULAR DIFFUSERS; ACT SO - Optics Letters 2004 ;29(24):2917-2919 11665 UI - 4872 AU - Mendez F AU - Luna E AU - Trevino C AU - Pop I AD - Inst Mexicano Petr, Programa YNF, Mexico City 07730, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Cluj, Fac Math, R-3400 Cluj Napoca, RomaniaMendez, F, Inst Mexicano Petr, Programa YNF, AP 14-805, Mexico City 07730, DF, Mexico TI - Asymptotic and numerical transient analysis of the free convection cooling of a vertical plate embedded in a porous medium AB - This paper analyzes the cooling process of a vertical thin plate originated by a fluid-saturated porous medium, taking into account the effects of both longitudinal and transversal heat conduction in the plate. Due to the finite thermal conductivity of the plate, a longitudinal temperature gradient arises within it, which prevents any similarity solution in the boundary layer, changing the mathematical character of the problem from parabolic to elliptic, for large values of the suitable Rayleigh number. The energy balance equations are reduced to a system of two differential equations with two parameters: the nondimensional plate thermal conductivity alpha and the aspect ratio of the plate epsilon. In order to obtain the evolution of the temperature of the plate as a function of time and position, the coupled balance equations are integrated numerically for several values of the parameters, including the cases of very good and poor conducting plates. The results obtained, are compared with an asymptotic analysis based on the multiple scales technique carried out for the case of a very good conducting plate. There is at the beginning a fast transient in nondimensional time scale of order alpha followed by a slow nondimensional time scale of order unity, which gives the evolution of the cooling process. Good agreement is achieved even for values of the conduction parameter alpha of order unity. The asymptotic solution allows us to give closed form analytical solution for the plate temperature evolution in time and space. The overall thermal energy of the plate decreases faster for smaller values of alpha MH - Mexico|Distrito Federal MH - Romania PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Mechanics U5 - J;Article AV - English IS - 0947-7411 UR - ISI:000222751600002 L2 - CONJUGATE FREE-CONVECTION; SURFACE HEAT-FLUX; FLAT-PLATE; FLOW SO - Heat and Mass Transfer 2004 ;40(8):593-602 11666 UI - 4838 AU - Mendoza-Franco EF AU - Kritsky DC AU - Vidal-Martinez VM AU - Scholz T AU - guirre-Macedo ML AD - Idaho State Univ, Coll Hlth Profess, Dept Hlth & Nutr Sci, Pocatello, ID 83209, USAIPN, CINVESTAV, Ctr Res & Adv Studies, Parasitol Lab, Merida 97310, Yucatan, MexicoAcad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicMendoza-Franco, EF, Idaho State Univ, Coll Hlth Profess, Dept Hlth & Nutr Sci, Camps Box 8090, Pocatello, ID 83209 USA TI - Neotropical monogenoidea. 45. Revision of Diplectanocotyla Yamaguti, 1953 (Diplectanidae) with redescription of Diplectanocotyla megalopis Rakotofiringa and Oliver, 1987 on Atlantic tarpon, Megalops atlanticus Cuvier and Valenciennes, from Nicaragua and Mexico AB - The diagnosis of Diplectanocotyla (Monogenoidea: Dactylogyridea) is emended, the genus is transferred to the Diplectanidae, and the Diplectanocolylidae is considered a junior synonym of the Diplectanidae. Diplectanocotyla mcgalopis is redescribed from gills of Atlantic tarpon, Megalops atlanticus (Megalopidac), from the Atlantic coasts of Nicaragua and Mexico (new host and locality records). Although D. megalopis was previously found on the Atlantic tarpon in Puerto Rico, the species from this host was originally misidentified as Diplectanocotyla gracilis. Diplectanocotyla is differentiated from other diplectanid genera by its members having a haptor with 2 central suckers (1 ventral. 1 dorsal) and paired ventral bars, a pair of squamodiscs with concentric rows of scales, a spined tegument of the posterior trunk and peduncle, ail ovary looping the right intestinal cecum, and a vas deferens looping the left intestinal cecum MH - Czech Republic MH - USA MH - Mexico|Yucatan PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 7 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000223036100008 L2 - Monogenoidea;Diplectanidae;Diplectanocotylidae;Diplectanocotyla;Diplectanocotyla gracilis;Diplectanocotyla megalopis;Megalopidae;Megalops atlanticus;biogeography;Atlantic tarpon;Nicaragua;Mexico;PLATYHELMINTHES; FISHES; DIVERSIFICATION; DACTYLOGYRIDEA; TELEOSTEI; BYCHOWSKY; GEN SO - Comparative Parasitology 2004 ;71(2):158-165 11667 UI - 6030 AU - Mendoza CI AU - Marques CM AD - LDFC, UMR 7506, F-67084 Strasbourg, FranceMendoza, CI, Natl Autonomous Univ Mexico, Inst Invest Mat, Apdo Postal 70-360, Mexico City 04510, DF, Mexico TI - Fluctuating diffusion-limited aggregates AB - We study the structure and growth of a diffusion-limited aggregate (DLA) for which the constitutive units remain mobile during the aggregation process. Contrary to DLA where far from equilibrium conditions are the prevalent factor for growth, the structure of the aggregate is here determined by a combination of annealed and quenched processes. The internal flexibility allows the aggregate to span the equilibrium configurational space, and such thermally driven motion further modifies the connectivity statistics of the growing branched structure. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000220067600001 L2 - diffusion-limited aggregates;fluctuation phenomena;colloids;CLUSTER-CLUSTER AGGREGATION; KINETIC CRITICAL PHENOMENON; FRACTAL DIMENSION; GEOMETRY; POLYMERS; LATTICE SO - Physica A-Statistical Mechanics and Its Applications 2004 ;335(3-4):305-313 11668 UI - 4752 AU - Mendoza JY AU - Dardente H AU - Escobar C AU - Pevet P AU - Challet E AD - Univ Strasbourg 1, Dept Neurosci, IFR37, Lab Neurobiol Rhythms, F-67000 Strasbourg, FranceUniv Nacl Autonoma Mexico, Fac Med, Dept Anat, Mexico City 04510, DF, MexicoChallet, E, Univ Strasbourg 1, Dept Neurosci, IFR37, Lab Neurobiol Rhythms, 12 Rue Univ, F-67000 Strasbourg, France TI - Dark pulse resetting of the suprachiasmatic clock in syrian hamsters: Behavioral phase-shifts and clock gene expression AB - In mammals, the circadian clock in the suprachiasmatic nuclei (SCN) is mainly synchronized to photic cues provided by the daily light/dark cycle. Phase-shifts produced by light exposure during the night are correlated with rapid induction of two clock genes, Per1 and Per2, in the SCN. Nonphotic stimuli such as behavioral and pharmacological cues, when presented during the subjective day, induce behavioral phase-advances and a down-regulation of Per1 and Per2 expression in the SCN. When applied during the subjective day, dark pulses in continuous light also produce phase-advances. These phase-shifting effects have been interpreted as reflecting either a photic image mirror, nonphotic cues, or a combination of both. Here we evaluated in Syrian hamsters housed in constant light how dark pulses applied in late subjective day affect levels of Per1, Per2 and Cry1 mRNA. Four-hour dark pulses with no access to a wheel produced 1.2+/-0.4 h phase-advances of locomotor activity rhythm while control manipulation induced non-significant shifts (0.1+/-0.2 h). Dark pulses transiently down-regulated Per1 and Per2 mRNA levels in the SCN by 40 and 20% respectively, while the levels of Cry1 mRNA remained unaffected. In behaviorally split hamsters in which Per oscillations were asymmetric between the left and right sides of the SCN, dark pulses reduced Per expression in the half-SCN with high Per. This study shows that exposure during the late subjective day to dark pulses independent of wheel-running have nonphotic-like effects on the SCN clock at both behavioral and molecular levels. (C) 2004 IBRO. Published by Elsevier Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000223156400025 L2 - circadian rhythm;nonphotic;Period gene;wheel-running activity;MOUSE CIRCADIAN CLOCK; MESSENGER-RNA LEVELS; RESPONSE CURVES; NEUROPEPTIDE-Y; CONSTANT LIGHT; INTERGENICULATE LEAFLET; SEROTONERGIC AFFERENTS; PHOTIC ENTRAINMENT; SLEEP-DEPRIVATION; ACTIVITY RHYTHMS SO - Neuroscience 2004 ;127(2):529-537 11669 UI - 5060 AU - Mendoza R AU - Moro MA AU - Sanchez-Gonzalez J AU - Castillo-Henkel C AU - Blanco-Tufino JA AU - Cobilt-Catana R AU - Villanueva C AD - IPN, Escuela Super Med, Mexico City, DF, MexicoUniv Complutense Madrid, Fac Med, E-28040 Madrid, SpainUDEFA, Escuela Med Militar, Mexico City, DF, MexicoHosp Cent Mil, Mexico City, DF, Mexico TI - Change in markers of endothelial function produced by ozone inhalation in rats MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0891-5849 UR - ISI:000221320200255 SO - Free Radical Biology and Medicine 2004 ;36():S98-S98 11670 UI - 3736 AU - Mendoza S AU - Moran AL AU - Decouchant D AU - Enriquez AMM AU - Favela J AD - Lab Logiciels Syst Reseaux, Grenoble, FranceUABC, Fac Ciencias, Ensenada, Baja California, MexicoIPN, CINVESTAV, Dept Ingn Electr, Mexico City, DF, MexicoCICESE, Dept Ciencias Computac, Ensenada, Baja California, MexicoMendoza, S, Lab Logiciels Syst Reseaux, Grenoble, France TI - Access control-based distribution of shared documents AB - The PI (N) over tilde AS platform provides an authoring group with support to collaboratively and consistently produce shared Web documents. Such documents may include costly multimedia resources, whose management raises important issues due to the constraints imposed by Web technology. This poster presents an approach for distributing shared Web documents to the authoring group's sites, taking into consideration current organization of the concerned sites, access rights granted to the co-authors and storage device capabilities MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000225021000006 SO - On the Move to Meaningful Internet Systems 2004: Otm 2004 Workshops, Proceedings 2004 ;3292():12-13 11671 UI - 4257 AU - Mendoza S AU - Castano E AU - Meas Y AU - Godinez LA AU - Kaifer AE AD - Ctr Invest & Desarrollo Tecnol Electroquim SC, Electrochem Dept, Queretaro, MexicoUniv Autonoma Queretaro, Sch Chem, Queretaro, MexicoUniv Miami, Dept Chem, Ctr Supramol Sci, Coral Gables, FL 33124, USAGodinez, LA, Ctr Invest & Desarrollo Tecnol Electroquim SC, Electrochem Dept, Queretaro, Mexico TI - Analysis of the voltammetric response of electroactive guests in the presence of non-electroactive hosts at moderate concentrations AB - In this work, we present a method to analyze the voltammetric response of reversible redox systems involving molecules that, bearing m non-interactive electroactive sites, can undergo fast complexation equilibria with host molecules present at concentrations of the same order of magnitude as those of the electroactive guest. The approach focuses on systems for which the relative values of the binding constants for the oxidized and reduced forms of the guest result in the displacement of the voltammetric response of the electroactive molecule as the concentration of the host is increased in the electrolytic solution. This behavior is commonly known as "one wave shift behavior". Based on a series of assumptions, the method allows calculation of all the thermodynamic parameters that describe the electrochemical and complexation equilibria of a given host-guest system. The main strength of the suggested method, however, relies on the fact that it only requires cyclic voltammetry data and that it can be used for systems in which large concentrations of the host can not be employed either due to important changes of the ionic strength or to solubility problems. Although the accuracy of the obtained information is limited by the quality of the data provided by the technique, and by the assumptions employed, it certainly represents an excellent starting point for subsequent refinement either using digital simulations or an independent experimental technique MH - Mexico|Queretaro MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Electrochemistry U5 - J;Article AV - English IS - 1040-0397 UR - ISI:000224229200001 L2 - electroactive guests;non-electroactive hosts;voltammetric responses;reversible redox systems;binding constants;one-wave shift behavior;BETA-CYCLODEXTRIN; FERROCENE DERIVATIVES; INCLUSION COMPLEXES; BINDING; COBALTOCENIUM; ANIONS SO - Electroanalysis 2004 ;16(18):1469-1477 11672 UI - 5352 AU - Mendoza S AU - Decouchant D AU - Enriquez AMM AU - Moran AL AD - Lab Logiciels Syst Reseaux, Grenoble, France. UABC, Fac Ciencias, Ensenada, Baja California, Mexico. IPN, CINVESTAV, Dept Ingn Elect, Mexico City 07738, DF, Mexico TI - Adaptive resource management in the PINAS web cooperative environment AB - The PE AS Web cooperative environment allows distributed authors working together to produce shared documents in a consistent way. The management of shared resources in such an environment raises important technical issues due to the constraints imposed by Web technology. An elaborated group awareness function is provided that allows each author notifying his contributions to other authors, and controlling the way by which other contributions are integrated into his/her environment. In order to support this function, essential to every groupware application, we designed a self-adaptive cooperative environment. We propose a new way of structuring Web documents to be considered as independent resource containers with their corresponding management context. This representation of information simplifies the design of mechanisms to share, modify and update documents and their resources in a consistent and controlled way. Scenarios are used to motivate the need for robust mechanisms for the management of shared Web documents and to illustrate how the extensions presented address these issues MH - France MH - Mexico|Baja California MH - Mexico|Distrito Federal T3 - ADVANCES IN WEB INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - ON REQUEST (05/05/08) U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleSonia.Mendoza@imag.fr Dominique.Decouchant@imag.fr ammartin@mail.cinvestav.mx Alberto.Moran@imag.fr2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBAE37 AV - English IS - 0302-9743 UR - ISI:000221807000004 L2 - web document;shared resource;self-adaptive cooperative environment;PINAS platform;replication and updating SO - 2004 ;():33-43 11673 UI - 5959 AU - Mendoza S AU - Godinez LA AU - Kaifer AE AD - Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124, USAUniv Miami, Dept Chem, Coral Gables, FL 33124, USAUniv Autonoma Queretaro, Sch Chem, Queretaro, MexicoCtr Invest & Desarrollo Tecnol Electroquim SC, Electrochem Dept, Queretaro, MexicoKaifer, AE, Univ Miami, Ctr Supramol Sci, Coral Gables, FL 33124, USA TI - Tetrathiafulvalene-functionalized cavitands as building blocks for redox active hemicarcerands AB - Two new cavitands bearing four upper-rim tetrathiafulvalene (TTF) units were synthesized. One of these cavitands was used to prepare a redox-active hemicarcerand containing four TTF subunits covalently appended to its equatorial region. Preliminary electrochemical characterization data show that the four TTF residues in all these compounds behave as independent, non-interacting groups in their heterogeneous electron transfer reactions MH - Mexico|Queretaro MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1061-0278 UR - ISI:000220243500002 L2 - cavitand;hemicarcerand;electrochemistry;tetrathiafulvalene;SUPRAMOLECULAR CHEMISTRY; ELECTROCHEMISTRY; RECOGNITION; VOLTAMMETRY; KINETICS; BINDING; GUESTS SO - Supramolecular Chemistry 2004 ;16(3):165-169 11674 UI - 4800 AU - Menendez-Proupin E AU - Gutierrez G AU - Palmero E AU - Pena JL AD - Univ Santiago Chile, Dept Fis, Santiago 2, ChileUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaIPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, Merida 97130, Yucatan, MexicoUniv Uppsala, Condensed Matter Theory Grp, S-75105 Uppsala, SwedenMenendez-Proupin, E, Univ Chile, Fac Sci, Palmeras 3425, Santiago, Chile TI - Electronic structure of crystalline binary and ternary Cd-Te-O compounds AB - The electronic structure of crystalline CdTe, CdO, alpha-TeO2, CdTeO3, and Cd3TeO6 is studied by means of first principles calculations. The band structure, total and partial density of states, and charge densities are presented. For alpha-TeO2 and CdTeO3, Density Functional Theory within the Local Density Approximation (LDA) correctly describes the insulating character of these compounds. In the first four compounds, LDA underestimates the optical bandgap by roughly 1 eV. Based on this trend, we predict an optical bandgap of 1.7 eV for Cd3TeO6. This material shows an isolated conduction band with a low effective mass, thus explaining its semiconducting character observed recently. In all these oxides, the top valence bands are formed mainly from the O 2p electrons. On the other hand, the binding energy of the Cd 4d band, relative to the valence band maximum, in the ternary compounds is smaller than in CdTe and CdO MH - Chile MH - Cuba MH - Mexico|Yucatan MH - Sweden PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000222996700042 L2 - II-VI SEMICONDUCTORS; AMORPHOUS CADMIUM TELLURIDE; TOTAL-ENERGY CALCULATIONS; AB-INITIO CALCULATIONS; WAVE BASIS-SET; SELF-INTERACTION; BAND-STRUCTURE; OXIDE-FILMS; THIN-FILMS; CORRECTED PSEUDOPOTENTIALS SO - Physical Review B 2004 ;70(3): 11675 UI - 5379 AU - Menes-Arzate M AU - Martinez R AU - Cruz-Almanza R AU - Muchowski JM AU - Osornio YM AU - Miranda LD AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRoche Palo Alto, Palo Alto, CA 94304, USAMartinez, R, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Efficient, "tin-free" radical cyclization to aromatic systems. Synthesis of 5,6,8,9,10,11-hexahydroindolo[2,1-alpha]isoquinolines AB - Efficient radical cyclization of alkyl iodides to various aromatic systems including pyrrole, indole, isoquinolone, pyridone, and benzene, mediated by dicumyl peroxide, is described. The methodology was used to provide access to 5,6,8,9,10,11-hexahydroindolo[2,1-a]isoquinoline derivatives MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000221624900058 L2 - MN(III) ACETATE; PYRROLES; BU3SNH; HETEROCYCLES; IMIDAZOLES; OXIDATION; ALKYNES; ETHERS; CE(IV) SO - Journal of Organic Chemistry 2004 ;69(11):4001-4004 11676 UI - 2551 AU - Meng H AU - Peng CS AU - Song SX AU - Deng D AD - Beijing Univ Chem Technol, Sch Chem Engn, Beijing 100083, Peoples R ChinaBeijing Union Univ, Coll Arts & Sci, Beijing 100083, Peoples R ChinaPeng, CS, Univ Autonoma San Luis Potosi, Inst Met, Ave Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Electro-regeneration mechanism of ion-exchange resins in electrodeionization AB - The regeneration mechanism of ion-exchange resins in the electrodeionization process has been studied with theoretical and experimental investigation. Theoretically, contact forms of resins and membranes can be divided into 4 types, and the possible places of water-splitting are located at the contact faces of different types resins and membranes, for example, cation ion-exchange resins contact with anion ion-exchange resins or membranes, anion ion-exchange resins contact with cation ion-exchange resins and membranes, according to the theoretical calculation. And the exhausted ion-exchange resins can be regenerated by the electrodeionization process with the regeneration efficiency at 70-80% in this work MH - Mexico|San Luis Potosi MH - Peoples R China PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0218-625X UR - ISI:000228224300017 L2 - electrodeionization;ion-exchange resin;ion-exchange membrane;regeneration;watersplitting;REMOVAL; ELECTRODIALYSIS; MEMBRANES; COBALT SO - Surface Review and Letters 2004 ;11(6):599-605 11677 UI - 5066 AU - Mennella JA AU - Turnbull B AU - Ramos RI AU - Ziegler PJ AU - Martinez H AD - Monell Chem Senses Ctr, Philadelphia, PA 19104, USAInst Mexicano Seguro Social, Mexico City, DF, MexicoGerber Prod Co, Parsippany, NJ 07054, USA TI - Infant feeding practices and early flavor experiences in Mexican infants: An inter-cultural study MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470600811 SO - Faseb Journal 2004 ;18(4):A168-A168 11678 UI - 7089 AU - Meraz RL AU - Vidales AM AU - Dominguez A AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoCIIEMAD, IPN, Mexico City 07700, DF, MexicoUniv Nacl San Luis, CONICET, Dept Fis, RA-5700 San Luis, ArgentinaDominguez, A, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534,Col Vicentina Av San Rafael Atlixco 18, Mexico City 09340, DF, Mexico TI - A fractal-like kinetics equation to calculate landfill methane production AB - Landfill appears as a convenient choice to get rid of municipal solid waste while providing energy, due to methane generated through anaerobic fermentation. However, without capture and treatment landfill gas is considered an important source of atmospheric methane. The control and use of this gas require knowledge of both, current yield and long-term accumulative production. These values are usually calculated with mathematical expressions that consider 100% of conversion, and homogeneous chemical reactivity inside the fill. Nevertheless, fermentation in landfills is erratic and spatially heterogeneous. This work introduces a fractal-like chemical kinetics equation to calculate methane generation rate from landfill, Q(CH4) (m(3)/year), in the way: Q(CH4) = L(0)Sigma(j)Sigma(i)M(ij)C(ij)(0)k(i)(t(j))(-dx/2) exp[-k(i)t(j)], where fermentable wastes are partitioned in readily, moderately and slowly biodegradable categories, Lo is the potential of methane yield of refuse (m(3)/tonne under standard conditions), d(s) is the solid-phase fracton dimension, k(i) is the reaction kinetics constant of waste category i (year(-1)), and t(j) is the time from the year of burying j (year), C-ij(0) (kg/tonne) and M-ij (kg) are the initial concentration and the mass of waste category i landfilled in year j, respectively. The idea behind this equation is that methane production kinetics is limited by the diffusion of hydrolyzed substrate into a heterogeneous solid-phase towards discrete areas, where methanogenesis occurs. A virtual study for a hypothetical case is developed. The predictions from this fractal approach are contrasted with those coming from two equations broadly used in the industrial work. The fractal-like kinetics equation represents better the heterogeneous nature of the fermentation in landfills. (C) 2004 Elsevier Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0016-2361 UR - ISI:000186252400009 L2 - chemical kinetics;fractal;landfill;methane;SOLID-STATE DIGESTION; BIODEGRADATION; DEGRADATION; REFUSE; MODEL SO - Fuel 2004 ;83(1):73-80 11679 UI - 831 AU - Mercado A AU - Gamba G AU - Mount DB AD - W Roxbury VA Med Ctr, Div Renal, Boston, MA, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Boston, MA 02115, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Mexico City 14000, DF, MexicoInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoMercado, A, W Roxbury VA Med Ctr, Div Renal, Boston, MA, USA TI - Molecular physiology of mammalian K+-Cl- cotransporters MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental U5 - S;Article AV - English IS - 0065-2598 UR - ISI:000232359300003 L2 - VASCULAR SMOOTH-MUSCLE; RED-BLOOD-CELLS; CATION-CHLORIDE COTRANSPORTERS; NEURONAL-SPECIFIC ISOFORM; RAT MIDBRAIN NEURONS; HUMAN-ERYTHROCYTES; SHEEP ERYTHROCYTES; -COTRANSPORT SYSTEM; NA+-K+-2CL(-) COTRANSPORTER; FUNCTIONAL-CHARACTERIZATION SO - Cell Volume and Signaling 2004 ;559():29-41 11680 UI - 6610 AU - Mercado A AU - Mount DB AU - Gamba G AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoBrigham & Womens Hosp, Div Renal, Boston, MA 02115, USAHarvard Univ, Sch Med, VA Boston Healthcare Syst, Boston, MA, USAGamba, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Electroneutral cation-chloride cotransporters in the central nervous system AB - Several members of the cation-chloride cotransporter ( solute carrier family 12, SLC12) gene family are expressed within the central nervous system, with one family member, the K+-Cl- cotransporter KCC2, exclusive to neurons. These transporters are best known for their roles in cell volume regulation and epithelial salt transport, but are increasingly receiving attention in neuroscience. In particular, intracellular chloride activity and hence the neuronal response to GABA and glycine appears to be determined by a balance between chloride efflux and influx through KCC2 and the Na+-K+-2Cl(-) cotransporter NKCC1, respectively. This relationship has important implications for neuronal development, sensory perception, neuronal excitability, and the response to neuronal injury. Finally, the association between loss of function in the K+-Cl- cotransporter KCC3, with a severe peripheral neuropathy associated with agenesis of the corpus callosum, has revealed an unexpected role for K+-Cl- cotransport in the development and/or maintenance of both the central and peripheral nervous systems MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0364-3190 UR - ISI:000187659400004 L2 - KCC;potassium-chloride cotransporter;GABA;neural excitation;K-CL COTRANSPORTER; GABA(A) RECEPTOR ACTIVATION; NEURONAL-SPECIFIC ISOFORM; POSTNATAL RAT BRAINS; NA+-K+-2CL(-) COTRANSPORTER; MOLECULAR-CLONING; NA-K-2CL COTRANSPORTER; FUNCTIONAL EXPRESSION; SYNAPTIC INHIBITION; EXCITATORY ACTIONS SO - Neurochemical Research 2004 ;29(1):17-25 11681 UI - 5954 AU - Mercado JM AU - Sanchez-Saavedra MD AU - Correa-Reyes G AU - Lubian L AU - Montero O AU - Figueroa FL AD - Inst Espanol Oceanog, Ctr Oceanog Malaga, E-29640 Puerto Pesquero, SpainCICESE, Dept Acuicultura, Ensenada 22830, Baja California, MexicoCSIC, Inst Ciencias Marinas Andalucia, E-11510 Cadiz, SpainUniv Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, SpainMercado, JM, Inst Espanol Oceanog, Ctr Oceanog Malaga, S-N Apdo 285, E-29640 Puerto Pesquero, Spain TI - Blue light effect on growth, light absorption characteristics and photosynthesis of five benthic diatom strains AB - Bio-optical characteristics and photosynthetic performance of five strains of benthic diatoms belonging to three different species (Nitzschia thermalis Kutzing var. minor Hilse sensu Podzorski, Nitzschia laevis Hust and Navicula incerta Grunow) were examined. The effects of treatments with monochromatic blue light (BL) were also determined. The values of photosynthesis rate at saturating photon fluence rate (PFR) (P-max and ascending initial slope of the P-PFR curves (alpha) ranged from 0.22 to 3.58 mumol O-2 per mg Chl alpha min(-1) and from 0.012 to 0.169 mumol O-2 per mg Chl alpha (mumol photons m(-2) s(-1))(-1) respectively. Onset of light saturation parameter (E-k) ranged from 43 to 12 mumol photons m(-2) s(-1). These values were comparable to those reported from measurements performed with sub-tidal benthic communities. In vivo effective optical cross-section of Chl alpha (alpha* values) was correlated to average cell surface area. Interestingly, alpha* and alpha were also negatively correlated, probably indicating that a higher pigment packaging affects negatively to alpha. The acclimation of the five strains to monochromatic BL for 2 weeks produced a reduction of P-max and alpha although the effective quantum yield of photosystem II (DeltaF/F-m') was not affected. In addition to these changes, chlorophyll alpha increased and alpha* decreased in the five strains. Therefore, it was concludedthat the reduction of alpha* could contribute to the changes in the photosynthetic performance in BL. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0304-3770 UR - ISI:000220269500006 L2 - bio-optic;benthic diatoms;chlorophyll fluorescence;light quality;photosynthesis;ALGAE; WATER; RED; PHOTOINHIBITION; MICROALGAE; CULTURE; GREEN SO - Aquatic Botany 2004 ;78(3):265-277 11682 UI - 5161 AU - Merin B AU - Montesinos B AU - Eiroa C AU - Solano E AU - Mora A AU - D'Alessio P AU - Calvet N AU - Oudmaijer RD AU - de Winter D AU - Davies JK AU - Harris AW AU - Cameron A AU - Deeg HJ AU - Ferlet R AU - Garzon F AU - Grady CA AU - Horne K AU - Miranda LF AU - Palacios J AU - Penny A AU - Quirrenbach A AU - Rauer H AU - Schneider J AU - Wesselius PR AD - LAEFF, E-28080 Madrid, SpainInst Astrofis Andalucia, CSIC, E-18080 Granada, SpainUniv Autonoma Madrid, Dept Fis Teor, Fac Ciencias, E-28049 Madrid, SpainUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Leeds, Dept Phys & Astron, Leeds LS2 9JT, W Yorkshire, EnglandTNO, TPD Space Instrumentat, NL-2600 AD Delft, NetherlandsRoyal Observ, Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, ScotlandDLR, Dept Planetary Explorat, D-12489 Berlin, GermanyUniv St Andrews, Dept Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandInst Astrofis Canarias, E-38200 San Cristobal la Laguna, SpainInst Astrophys, CNRS, F-75014 Paris, FranceNASA, Goddard Space Flight Ctr, NOAO, STIS, Greenbelt, MD 20771, USARutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandSterrewacht Leiden, NL-2300 RA Leiden, NetherlandsObserv Paris, F-92195 Meudon, FranceUniv Groningen, SRON, NL-9700 AV Groningen, NetherlandsMerin, B, LAEFF, Apartado 50727, E-28080 Madrid, Spain TI - Study of the properties and spectral energy distributions of the Herbig AeBe stars HD 34282 and HD 141569 AB - We present a study of the stellar parameters, distances and spectral energy distributions (SEDs) of HD 34282 and HD 141569, two pre-main sequence Herbig AeBe stars. Both objects have been reported to show "anomalous positions" in the HR diagram in the sense that they appear below the main sequence. A significant result of this work is that both stars arc metal-deficient. The Hipparcos distance of HD 34282 is very uncertain and the current study places the star at the expected evolutionary position in the HR diagram, i.e. as a PMS star. The distance for HD 141569 found in this work matches the Hipparcos distance, and the problem of its anomalous position is solved as a result of the low metallicity of the object: using the right metallicity tracks, the star is in the PMS region. The SEDs are constructed using data covering ultraviolet to millimetre wavelengths. Physical, non-parametric models, have been applied in order to extract some properties of the disks surrounding the stars. The disk around HD 34282 is accreting actively, it is massive and presents large grains in the mid-plane and small grains in the surface. HD 141569 has a very low mass disk, which is in an intermediate stage towards a debris-type disk MH - United Kingdom MH - France MH - Germany MH - Mexico|Michoacan MH - Netherlands MH - Spain MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000222213300029 L2 - stars : pre-main sequence;stars : fundamental parameters;stars : planetary systems : protoplanetary disks;T-TAURI STARS; INTERMEDIATE-MASS STARS; MAIN-SEQUENCE STARS; PARTICLE-SIZE DISTRIBUTION; VEGA-LIKE STARS; AE/BE STARS; ACCRETION DISKS; CIRCUMSTELLAR DISKS; INFRARED-EMISSION; YOUNG OBJECTS SO - Astronomy & Astrophysics 2004 ;419(1):301-318 11683 UI - 3670 AU - Merino G AU - Mendez-Rojas MA AU - Beltraan HI AU - Corminboeuf C AU - Heine T AU - Vela A AD - TU Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, GermanyUniv Amer Puebla, Dept Quim & Biol, Puebla 72820, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Geneva, CH-1211 Geneva, SwitzerlandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoMerino, G, TU Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, Germany TI - Theoretical analysis of the smallest carbon cluster containing a planar tetracoordinate carbon AB - A series of molecules, based on the smallest carbon cluster with one planar tetracoordinate carbon atom, C-5(2-), are presented. To gain a better understanding about which electronic factors contribute to their stabilization, several global reactivity indexes, molecular scalar fields, and magnetic responses were calculated. The optimized bond lengths and the topological analysis of the electron density show that the central carbon atom in the parent dianion C-5(2-) has a planar local environment, and it is coordinated to four other carbon atoms. The bonding of the parent dianion with the metal cations is highly ionic. The magnetic properties show that the C-5(2-) derivatives are strongly diatropic and have a remarkable transferability of structural and electronic features from the anion to the salts. The theoretical analysis suggests that the lithium salt, C5Li2, is the most plausible candidate for experimental detection MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Switzerland PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 26 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000225697000051 L2 - DENSITY-FUNCTIONAL THEORY; QUADRATIC CONFIGURATION-INTERACTION; ELECTRON LOCALIZATION; CONTAINING MOLECULES; CHEMICAL-SHIFTS; AB-INITIO; ATOM; GEOMETRIES; COMPLEXES; METHANE SO - Journal of the American Chemical Society 2004 ;126(49):16160-16169 11684 UI - 5294 AU - Merino S AU - Blazquez MC AU - Martinez J AU - Rodriguez-Estrella R AD - CSIC, Museo Nacl Ciencias Nat, E-28006 Madrid, SpainCIBNOR, La Paz 23090, Baja California, MexicoMerino, S, CSIC, Museo Nacl Ciencias Nat, C Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Stress protein expression is related to tail loss in two species of iguanid lizards AB - During the spring of 1999, two species of iguanid lizards were captured in southern Baja California peninsula, Mexico. Blood was obtained from the tail to check for the presence of blood parasites in smears and stress proteins in cells. Levels of HSP70- and HSP60-like proteins from Sceloporus licki Van Denburgh, 1895 and Petrosaurus thalassinus (Cope, 1863) were analyzed with Western blot using antisera to human HSP60 and bovine HSP70. The potential effects of sex, tail regeneration, and haemoparasites on the expression of these proteins were also investigated. Both species differ significantly in stress protein levels and infection by haemoparasites. Petrosaurus thalassinus show the lower stress protein levels and the higher proportion of infection. Although blood parasites apparently affect the condition of P. thalassinus, stress protein levels are not significantly related with haemoparasites or condition. However, S. licki lizards showing tail regeneration have lower levels of HSP60-like protein. A negative relationship exists between the length of the regenerated part of the tail and the level of HSP60-like protein for S. licki. Based on what is known of the function of HSP60, down-regulation of the protein in blood cells may be linked to reallocation of energies to other tissues more active metabolically MH - Mexico|Baja California MH - Spain PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0008-4301 UR - ISI:000221934800006 L2 - HEAT-SHOCK PROTEINS; IBERIAN ROCK-LIZARD; LACERTA-MONTICOLA; BLOOD PARASITES; GROWTH; REGENERATION; CONSEQUENCES; BEHAVIOR; AUTOTOMY; VIVIPARA SO - Canadian Journal of Zoology-Revue Canadienne de Zoologie 2004 ;82(3):436-441 11685 UI - 3803 AU - Merlo O AU - Jung C AU - Seligman TH AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Basel, Inst Theoret Phys, CH-4003 Basel, SwitzerlandJung, C, UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, Mexico TI - Symmetry properties of periodic orbits extracted from scattering data AB - Discrete symmetries of a system are reflected in the properties of the shortest periodic orbits. By applying a recent method to extract these from the scaling of the fractal structure in scattering functions, we show how the symmetries can be extracted from scattering data simultaneously with the periods and the Lyapunov exponents. We pay particular attention to the change of scattering data under a small symmetry breaking. (C) 2004 American Institute of Physics MH - Mexico|Morelos MH - Switzerland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 1054-1500 UR - ISI:000225378600016 L2 - CHAOTIC SCATTERING; SYSTEMS SO - Chaos 2004 ;14(4):969-974 11686 UI - 6110 AU - Mermoz ME AU - Ornelas JF AD - Inst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91070, Veracruz, MexicoMermoz, ME, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ecol Genet & Evoluc, Lab Ecol & Comportamiento, Pabellon 2 4 Piso,Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina TI - Phylogenetic analysis of life-history adaptations in parasitic cowbirds AB - Parasitic cowbirds lay eggs in the nests of other species and dupe them into caring for their young. Unlike other brood parasites, cowbirds have not developed egg mimicry or bizarre chick morphology. However, most of them parasitize a large number of hosts. Several features of cowbirds have been proposed as more general adaptations to brood parasitism. In this study, we used a recent molecular phylogeny as a historical framework to test the possible adaptations of the parasitic cowbird, including egg size, eggshell thickness and energy content of the eggs, length of the incubation period, and growth pattern of cowbird nestlings. We used a recently developed extension of independent contrasts to test whether the five cowbird species deviate from general allometric equations. We generated prediction intervals for a nonparasite that evolved in the place of the cowbirds. By using these prediction intervals, we found that parasitic cowbirds had not reduced weight or energy content of their eggs, nor their incubation period over evolutionary time. Cowbird chicks and those of nonparasitic relatives had similar growth pattern. The only characteristic that separated parasitic cowbirds from their nonparasitic relatives was an increase in eggshell thickness. All these findings were robust and resisted the use of three models of character evolution. The fact that most traits exhibited by cowbirds were inherited from a nonparasitic ancestor does not rule out that they are advantageous for parasitism. Future research should focus on such traits of cowbird relatives and on how these traits preadapted a particular lineage to become parasites MH - Argentina MH - Mexico|Veracruz PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 5 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Review AV - English IS - 1045-2249 UR - ISI:000189345400013 L2 - adaptation;cowbirds;eggshell;egg size;Icteridae;incubation period;independent contrasts;nestling development;phylogeny;BROWN-HEADED COWBIRDS; RED-WINGED BLACKBIRDS; BROOD PARASITISM; SHINY COWBIRD; AVIAN EGG; INDEPENDENT CONTRASTS; CONFIDENCE-INTERVALS; MOLECULAR PHYLOGENY; SCREAMING COWBIRD; INCUBATION-TIME SO - Behavioral Ecology 2004 ;15(1):109-119 11687 UI - 5128 AU - Meza-Aguilar S AU - M'Passi-Mabiala B AU - Demangeat C AD - Univ Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Culiacan 80010, MexicoUniv Marien NGouabi, Dept Phys, LME, Brazzaville, CongoIPCMS, F-63034 Strasbourg 2, FranceMeza-Aguilar, S, Univ Autonoma Sinaloa, Escuela Ciencias Fis Matemat, Av Bldv Amer & Univ CU, Culiacan 80010, Mexico TI - The magnetic map of thin Mn overlayers on Ni(001) AB - Following experimental works of Wuttig et at. (Phys. Rev. Lett. 70 (1993) 3619) and O'Brien and Tonner (Phys. Rev. B 51 (1995) 617) very Mn thin films overlayers on Ni(001) have been investigated through ab initio density functional theory with generalized gradient corrections. A relaxed two-dimensional Mn0.5Ni0.5 ordered surface alloy shows evidence of ferromagnetic metastable solution in reasonable agreement with experimental results. (C) 2003 Published by Elsevier B.V MH - Congo MH - France MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700199 L2 - nickel;manganese;density functional calculations;magnetic surfaces;metal-metal interfaces;SURFACE ALLOYS; FILMS SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():1215-1216 11688 UI - 5378 AU - Meza-Leon RL AU - Crich D AU - Bernes S AU - Quintero L AD - Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, MexicoUniv Autonoma Puebla, Ctr Quim, Inst Ciencias, Puebla 72570, MexicoUniv Illinois, Dept Chem, Chicago, IL 60607, USAQuintero, L, Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla 72570, Mexico TI - Endo-selective quenching of hexahydropyrrolo[2,3-b]indole-based N-acyliminium ions AB - Radical decarboxylation Of L-tryptophan-derived (2S,3aR,8aS)-8-arylsulfonyl-1,2-di(methoxycarbonyl)-1,2,3,- 3a,8,8a-hexahydro-2H-pyrrolo[2,3-b]indoles 8 and 9 in the presence of diphenyl diselenide results in the endo-selective formation of (2R,3a-R,SaS)-8-arylsulfonyl-1-methoxycarbonyl-2-phenylselenyl-1,2,3,3a, 8,8a-hexahydro-2H-pyrrolo[2,3- b]indoles 10 and 11. These selenides, in conjunction with Lewis acids, serves as precursors to the corresponding N-acyl iminium ions, which undego selective endo-face quenching by allyltributylstannane, allyltrimethylsilane, propargyltrimethylsilane, and trimethylsilylcyanide. Stereochemical assignments rest on NMR data and crystallographic studies. The endo-selective nature of these reactions is interpreted in terms of minimization of allylic strain at the transition state for nucleophilic attack on the N-acyl iminum ion MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000221624900051 L2 - RADICAL CHAIN-REACTIONS; CYCLIC TAUTOMERS; TRYPTOPHAN DERIVATIVES; ENANTIOSPECIFIC SYNTHESIS; ASYMMETRIC-SYNTHESIS; AMINO-ACIDS; CHEMISTRY; ALKYLATION; INVENTION; FACE SO - Journal of Organic Chemistry 2004 ;69(11):3976-3978 11689 UI - 3771 AU - Meza I AU - Clarke M AD - CINVESTAV, Dept Biomed Mol, IPN, Mexico City, DF, MexicoOklahoma Med Res Fdn, Program Mol & Cell Biol, Oklahoma City, OK 73104, USAMeza, I, CINVESTAV, Dept Biomed Mol, IPN, Apartado 14-740, Mexico City, DF, Mexico TI - Dynamics of Endocytic traffic of Entamoeba histolytica revealed by confocal microscopy and flow cytometry AB - Entamoeba histolytica, the protozoan parasite of humans, manifests constitutive endocytosis to obtain nutrients and, when induced to express invasive behavior, as a means of ingesting and processing host cells and tissue debris. E. histolytica trophozoites were grown in liquid axenic medium that contained fluorescently labeled fluid-phase markers, so that the kinetics of uptake, the transit of loaded endosomes through the cytoplasm, and the time of release of the markers could be monitored by flow cytometry. Confocal microscopy of live trophozoites revealed uptake of fluid by avid macropinocytosis and the occurrence of fusion between young and older endosomes, as well as between pinosomes and phagosomes containing bacteria. Endosomes were rapidly acidified, then gradually neutralized; finally, indigestible material was released. Transit of endosomes containing fluid-phase markers required about 2 h. Uptake and release of fluid-phase markers were impaired by drugs that inhibited actin dynamics and actin-myosin interaction; uptake was also impaired by inhibition of PI 3-kinase. A striking feature of the trophozoites was the great heterogeneity of their endocytic behavior. (C) 2004 Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Cell Biology U5 - J;Article AV - English IS - 0886-1544 UR - ISI:000225542900001 L2 - parasites;amoebae;macropinocytosis;endosomes;fusion;phagocytosis;DICTYOSTELIUM-DISCOIDEUM; PHOSPHOINOSITIDE 3-KINASE; HUMAN-ERYTHROCYTES; TARGET-CELLS; RAB GTPASES; PATHWAY; MACROPINOCYTOSIS; PHAGOCYTOSIS; TROPHOZOITES; BACTERIA SO - Cell Motility and the Cytoskeleton 2004 ;59(4):215-226 11690 UI - 4401 AU - Meza MM AU - Kopplin MJ AU - Burgess JL AU - Gandolfi AJ AD - Univ Arizona, Dept Pharmacol & Toxicol, Tucson, AZ 85724, USAITSON, Dept Nat Resources, Sonora 85000, MexicoUniv Arizona, Coll Publ Hlth, Tucson, AZ 85719, USAGandolfi, AJ, Univ Arizona, Dept Pharmacol & Toxicol, 1723 E Mabel St, Tucson, AZ 85724 USA TI - Arsenic drinking water exposure and urinary excretion among adults in the Yaqui Valley, Sonora, Mexico AB - The objective of this study was to determine arsenic exposure via drinking water and to characterize urinary arsenic excretion among adults in the Yaqui Valley, Sonora, Mexico. A cross-sectional study was conducted from July 2001 to May 2002. Study subjects were from the Yaqui Valley, Sonora, Mexico, residents of four towns with different arsenic concentrations in their drinking water. Arsenic exposure was estimated through water intake over 24h. Arsenic excretion was assessed in the first morning void urine. Total arsenic concentrations and their species arsenate (As V), arsenite (As III), monomethyl arsenic (MMA), and dimethyl arsenic (DMA) were determined by HPLC/ICP-MS. The town of Esperanza with the highest arsenic concentration in water had the highest daily mean intake of arsenic through drinking water, the mean value was 65.5 mug/day. Positive correlation between total arsenic intake by drinking water/day and the total arsenic concentration in urine (r = 0.50, P<0.001) was found. Arsenic excreted in urine ranged from 18.9 to 93.8 mug/L. The people from Esperanza had the highest geometric mean value of arsenic in urine, 65.1 mug/L, and it was statistically significantly different from those of the other towns (P<0.005). DMA was the major arsenic species in urine (47.7-67.1%), followed by inorganic arsenic (16.4-25.4%), and MMA (7.5-15%). In comparison with other reports the DMA and MMA distribution was low, 47.7-55.6% and 7.5-9.7%, respectively, in the urine from the Yaqui Valley population (except the town of Cocorit). The difference in the proportion of urinary arsenic metabolites in those towns may be due to genetic polymorphisms in the As methylating enzymes of these populations. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000223943900002 L2 - arsenic;urinary arsenic;arsenic drinking water;sonora;Yaqui Valley;MONOMETHYLARSONOUS ACID; TAIWAN; METHYLATION; METABOLITES; RESIDENTS; TOXICITY; CHILDREN; CANCERS; AREA SO - Environmental Research 2004 ;96(2):119-126 11691 UI - 4555 AU - Michalek G AU - Gopalswamy N AU - Lara A AU - Manoharan PK AD - Jagiellonian Univ, Astron Observ, Krakow, PolandNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USACatholic Univ Amer, Washington, DC 20064, USAUNAM, Inst Geofis, Mexico City, DF, MexicoMichalek, G, Jagiellonian Univ, Astron Observ, Krakow, Poland TI - Arrival time of halo coronal mass ejections in the vicinity of the Earth AB - We describe an empirical model to predict the 1-AU arrival time of halo CMEs. This model is based on the effective acceleration described by Gopalswamy et a]. (2000a, Geophys. Res. Lett., 27, 145). We verify the Helios/Pioneer Venus Orbiter(PVO) estimation of the effective acceleration profile (Gopalswamy et al. 2001a, J. Geophys. Res., 106, 29207) by considering all full halo CMEs recorded by SOHO/LASCO coronagraphs until the end of 2002. In comparison with previous studies, the present work includes CMEs of a wider range of initial velocities. To improve the accuracy of prediction, we propose to introduce the effective acceleration from two groups of CMEs only, which are expected to have no acceleration cessation at any place between the Sun and Earth. In addition, we consider acceleration cessation distance dependent on initial velocities of a given event CME. For a detailed analysis of this model, we examine projected sky-plane and space speeds (Michalek et al. 2003, ApJ, 584, 472) of CMEs. We show that a correct acceleration profile is crucial for the estimation of 1 AU arrival time of halo CMEs. We estimate that the CME arrival times can be predicted with an average error of 9 and 11 for space and sky-plane initial velocities, respectively MH - Mexico|Distrito Federal MH - Poland MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223621400038 L2 - Sun : coronal mass ejections (CMEs);INTERPLANETARY SHOCKS; EVENTS; 1-AU SO - Astronomy & Astrophysics 2004 ;423(2):729-736 11692 UI - 6440 AU - Michallet M AU - Maloisel F AU - Delain M AU - Hellmann A AU - Rosas A AU - Silver RT AU - Tendler C AD - Hop Edouard Herriot, F-69437 Lyon 03, FranceHop Hautepierre, Strasbourg, FranceHop Bretonneau, Tours, FranceMed Univ Gdansk, Gdansk, PolandCtr Mexico Nacl La Raza Inst Mexicano Seguro Soci, Mexico City, DF, MexicoNew York Presbyterian Hosp, Weill Cornell Med Ctr, New York, NY, USASchering Plough Corp, Kenilworth, NJ 07033, USAMichallet, M, Hop Edouard Herriot, Pavillon E,Pl Arsonval, F-69437 Lyon 03, France TI - Pegylated recombinant interferon alpha-2b vs recombinant interferon alpha-2b for the initial treatment of chronic-phase chronic myelogenous leukemia: a phase III study AB - Recombinant interferon alpha-2b (rIFN-alpha2b) is an effective therapy for chronic-phase chronic myelogenous leukemia (CML). Polyethylene glycol-modified rIFN-alpha2b is a novel formulation with a serum half-life (similar to40 h) compatible with once-weekly dosing. This open-label, noninferiority trial randomized 344 newly diagnosed CML patients: 171 received subcutaneous pegylated rIFN-alpha2b (6 mug/kg/week); 173 received rIFN-alpha2b ( 5 million International Units/m(2)/day). Primary efficacy end point was the 12-month major cytogenetic response (MCR) rate (<35% Philadelphia chromosome-positive cells). Modified efficacy analysis included all MCRs > 12 months, except for patients discontinuing treatment after 6 months and achieving an MCR on other salvage therapy. The MCR rates were 23% for pegylated rIFN-alpha2b vs 28% for rIFN-alpha2b in the primary efficacy analysis and 26 vs 28% in the prospectively modified efficacy analysis. However, a significant imbalance in baseline hematocrit (HCT), a significant predictor of cytogenetic response (P = 0.0001), was discovered: 51 (30%) patients treated with pegylated rIFN-alpha2b had low HCT (<33%) vs 33 (19%) rIFN-α2b-treated patients. Among patients with HCT >33%, the MCR rate was 33 vs 31%. The adverse event profile of weekly pegylated rIFN-alpha2b was comparable to daily rIFN-alpha2b. Once-weekly pegylated rIFN-alpha2b is an active agent for the treatment of newly diagnosed CML with an efficacy and safety profile similar to daily rIFN-alpha2b, although statistical noninferiority was not demonstrated MH - France MH - Mexico|Distrito Federal MH - Poland MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 18 U4 - Oncology;Hematology U5 - J;Article AV - English IS - 0887-6924 UR - ISI:000188329700015 L2 - chronic phase;chronic myelogenous leukemia;PEG Intron (R);pegylated recombinant interferon alpha-2b;CHRONIC MYELOID-LEUKEMIA; CYTOGENETIC RESPONSE; CONVENTIONAL CHEMOTHERAPY; ALPHA; SURVIVAL; CANCER; TRIAL; FORMULATION; BUSULFAN SO - Leukemia 2004 ;18(2):309-315 11693 UI - 5632 AU - Michaud F AU - Sosson M AU - Royer JY AU - Chabert A AU - Bourgois J AU - Calmus T AU - Mortera C AU - Bigot-Cormier F AU - Bandy W AU - Dyment J AU - Pontoise B AU - Sichler B AD - UPMC, UNSA, Geosci Azur, CNRS,IRD, F-06235 Villefranche Sur Mer, FranceIFREMER, Brest, FranceCNRS, Brest, FranceInst Phys Globe, Paris, FranceUniv Nacl Autonoma Mexico, Inst Geol, Hermosillo, Sonora, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Coyoacan, MexicoMichaud, F, UPMC, UNSA, Geosci Azur, CNRS,IRD, BP48, F-06235 Villefranche Sur Mer, France TI - Motion partitioning between the Pacific plate, Baja California and the North America plate: The Tosco-Abreojos fault revisited AB - During the FAMEX cruise of the R/V L'Atalante (April 2002), swath bathymetry and seismic profiles were recorded along the Baja California margin from 23degrees to 27degreesN. The upper-slope of the margin exhibits active faulting of recent sediments along the Tosco-Abreojos fault system (TAFS). Flower structures evidence strike-slip motion along the TAFS. Right lateral strike slip faulting, associated in places with small extensional features, are consistent with present-day slip and extension rates predicted along the TAFS. The TAFS thus belongs to the western active boundary of a Baja California Block yet not totally transferred to the Pacific plate MH - France MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000221085600005 L2 - GULF-OF-CALIFORNIA; KINEMATIC MODELS; 3 MA; TRANSFORM; MEXICO; ZONE SO - Geophysical Research Letters 2004 ;31(8): 11694 UI - 4904 AU - Michelangeli FA AU - Francisco-Ortega J AU - Gonzalez D AU - Jaramillo A AU - Ruiz E AU - Santiago E AU - Vovides AP AD - New York Bot Garden, Lewis & Dorothy Cullman Program Mol Systemat Stud, Bronx, NY 10458, USAFlorida Int Univ, Dept Sci Biol, Miami, FL 33199, USAInst Ecol Xalapa, Xalapa, Veracruz, MexicoUniv Fed Rio de Janeiro, ICB, CCS, Dept Bioquim Med, BR-21491590 Rio De Janeiro, BrazilConcepcion Univ, Dept Bot, Concepcion, ChileUniv Puerto Rico, Jardin Bot Puerto Rico, Rio Piedras, PR 00931, USAUniv Puerto Rico, Dept Biol, Rio Piedras, PR 00931, USAFairchild Trop Garden, Miami, FL 33156, USAMichelangeli, FA, New York Bot Garden, Lewis & Dorothy Cullman Program Mol Systemat Stud, Bronx, NY 10458 USA TI - Plant molecular systematics in Latin America: status, realities, and perspectives AB - Molecular biology techniques have had a great impact in modern studies of biodiversity across the globe, and they have contributed significantly to our understanding of evolutionary relationships across all kingdoms. Protein and DNA sequence data have provided a seemingly endless amount of characters to be used in phylogenetic studies, and they have allowed comparisons across divergent groups for which it is very difficult to establish morphological homologies. Researchers in Latin America have not escaped this revolution, and in several institutions efforts have been made to begin utilizing them. Economical, social and political factors have both slowed and stimulated the development of molecular systematics and phylogenetics in Latin America. Even though the continent is not homogeneous, and these factors may differ from country to country, some general patterns do exist across the region. In the present document, we will attempt to summarize the status of molecular systematic studies throughout Latin America, analyze which factors have stimulated or slowed down its development, and we will conclude with some suggestions on how to improve the current state of affairs MH - Brazil MH - Chile MH - Mexico|Veracruz MH - USA PB - VIENNA: INT ASSOC PLANT TAXONOMY RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0040-0262 UR - ISI:000222640200003 L2 - collaborations;current status;Latin America;molecular systematics;publications;PARSIMONY; BIOGEOGRAPHY; SEARCH SO - Taxon 2004 ;53(2):265-268 11695 UI - 5750 AU - Mickel JT AU - Tejero-Diez JD AD - New York Bot Garden, Bronx, NY 10458, USAUniv Nacl Autonoma Mexico, Escuela Nacl Estudios Profesionales Iztacala, Mexico City 54090, DF, MexicoMickel, JT, New York Bot Garden, Bronx, NY 10458, USA TI - Three new species of ferns (Woodsiaceae and Polypodiaceae) from Mexico AB - Mickel, J. T (The New York Botanical Garden, Bronx, NY, 10458-5126, U.S.A.; e-mail: jmickel@nybg.org) & J. D. Tejero-Diez, (Universidad Nacional Autonoma de Mexico, Escuela Nacional de Estudios Profesionales Iztacala, Carrera de Biologia, Apartado Postal 314, Tlalnepantla 54090, Mexico, Mexico; e-mail: tejero@servidor.unam.mx). Three new species of ferns (Woodsiaceae and Polypodiaceae) from Mexico. Brittonia 56: 115-120. 2004-Three new species of ferns are described from Mexico: Athyrium tripinnatum, Cystopteris millefolia, and Polypodium praetermissum MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-196X UR - ISI:000220798200003 L2 - Mexico;ferns;Athyrium;Cystopteris;Polypodium;CYSTOPTERIS SO - Brittonia 2004 ;56(2):115-120 11696 UI - 4557 AU - Micu S AU - Ortega JH AU - De Teresa L AD - Univ Craiova, Fac Matemat Informat, Craiova, RomaniaUniv Chile, CNRS, UMR 2071, Ctr Modelamiento Matemat, Santiago, ChileUNAM, Inst Matemat, Mexico City 04510, DF, MexicoMicu, S, Univ Craiova, Fac Matemat Informat, Craiova, Romania TI - An example of epsilon-insensitizing controls for the heat equation with no intersecting observation and control regions AB - This article is devoted to the c-insensitizing controllability of the heat equation with disjoint control and observation regions. In the 1-D case and for symmetric regions a positive answer is obtained. (C) 2004 Elsevier Ltd. All rights reserved MH - Chile MH - Mexico|Distrito Federal MH - Romania PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0893-9659 UR - ISI:000223573500009 L2 - heat equation;approximate controllability;insensitizing control;unique continuation property SO - Applied Mathematics Letters 2004 ;17(8):927-932 11697 UI - 5867 AU - Micu S AU - Ortega JH AU - De Teresa L AD - Univ Chile, Dept Ingn Matemat, Santiago, ChileUniv Craiova, Fac Matemat Informat, Cariova, RomaniaUniv Bio Bio, Fac Ciencias, Dept Matemat, Concepcion, ChileUNAM, Inst Matemat, Mexico City, DF, MexicoOrtega, JH, Univ Chile, Dept Ingn Matemat, Casilla 170-3 Correo 3, Santiago, Chile TI - epsilon-insensitizing controls for pointwise observations of the heat equation AB - In this paper, we study the epsilon-insensitizing controllability for the functional given by integrating in time the square of the solution of the heat equation in a finite number of points of the domain Omega subset of R-N, i.e., when the observation set is reduced to a finite set of points. We reduce the controllability problem to a unique continuation property for a cascade system of linear heat equations and we obtain a positive result in the case N less than or equal to 3. (C) 2003 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|Distrito Federal MH - Romania PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6911 UR - ISI:000220419900008 L2 - insensitizing control;heat equation;pointwise control;unique continuation property SO - Systems & Control Letters 2004 ;51(5):407-415 11698 UI - 6193 AU - Miledi R AU - Duenas Z AU - Martinez-Torres A AU - Kawas CH AU - Eusebi F AD - Univ Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697, USAUniv Calif Irvine, Dept Neurol, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Inst Neurobiol, Queretaro, MexicoUniv Roma La Sapienza, Ctr Eccellenza Biol & Med Mol, Dipartimento Fisiol Umana & Farmacol, I-00185 Rome, ItalySan Raffaele Pisana, Dipartimento Sci Internist, I-00163 Rome, ItalyMiledi, R, Univ Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697 USA TI - Microtransplantation of functional receptors and channels from the Alzheimer's brain to frog oocytes AB - About a decade ago, cell membranes from the electric organ of Torpedo and from the rat brain were transplanted to frog oocytes, which thus acquired functional Torpedo and rat neurotransmitter receptors. Nevertheless, the great potential that this method has for studying human diseases has remained virtually untapped. Here, we show that cell membranes from the postmortem brains of humans that suffered Alzheimer's disease can be microtransplanted to the plasma membrane of Xenopus oocytes. We show also that these postmortem membranes carry neurotransmitter receptors and voltage-operated channels that are still functional, even after they have been kept frozen for many years. This method provides a new and powerful approach to study directly the functional characteristics and structure of receptors, channels, and other membrane proteins of the Alzheimer's brain. This knowledge may help in understanding the basis of Alzheimer's disease and also help in developing new treatments MH - Italy MH - Mexico|Queretaro MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000188921200061 L2 - gamma-aminobutyric acid receptors;sodium channels;calcium channels;postmortem brain;XENOPUS-OOCYTES; HIPPOCAMPAL-FORMATION; MESSENGER-RNA; NEUROTRANSMITTER RECEPTORS; NEUROPATHOLOGIC CHANGES; AGED BRAINS; DISEASE; SUBUNIT; EXPRESSION; MEMBRANES SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(6):1760-1763 11699 UI - 4269 AU - Millan-Nunez E AU - Sieracki ME AU - Millan-Nunez R AU - Lara-Lara JR AU - Gaxiola-Castro G AU - Trees CC AD - Bigelow Lab Ocean Sci, Boothbay Harbor, ME 04575, USADept Ecol, Ctr Invest Cientifica & Educ Super Ensenada, Ensenada, Baja California, MexicoFac Ciencias Marinas, Ensenada, Baja California, MexicoSan Diego State Univ, Ctr Hydroopt & Remote Sensing, San Diego, CA 92120, USAMillan-Nunez, E, Bigelow Lab Ocean Sci, POB 474,180 McKown Point, Boothbay Harbor, ME 04575 USA TI - Specific absorption coefficient and phytoplankton biomass in the southern region of the California Current AB - In recent years, experts of optical hydrology have shown great interest in the variability of the specific absorption coefficient of light by phytoplankton (a(ph)*). This parameter is important and necessary for comparing in situ bio-optical and satellite optical measurements. Such comparisons are needed for detecting primary productivity at a mesoscale level. At present, however, the parameters used in algorithms for predicting productivity are global averages. To avoid this bias, we measured the spatial-temporal variability of a(ph)* as part of the Jan-01 Investigaciones Mexicanas de la Corriente de California cruise along the southern California Current. We observed median values of 0.041 chlorophyll a (Chl a))(-1) at 440nm and 0.015 at 674nm, with significant differences between inshore and offshore stations. In general, the stations located in the area of Bahia Vizcaino, with oceanographic conditions favorable for the growth of phytoplankton, showed lower values of the a(ph)*. The nano-microphytoplankton, (> 5 mum) community comprised of 26 diatom genera with mean abundance values of the 19.5 x 10(3) cells l(-1). Nitzschia closterium, a pennate diatom, was almost uniform throughout the study region. Flow cytometry measurements indicated that the picoplankton (< 5 mum) community consisted of two prokaryotes, Prochlorococcus (mean 3.6 x 106 cells l(-1)) and Synechococcus (mean 10.4 x 10(6) cells l(-1)), and a mixture of picoeukaryotes (mean 6.5 x 10(6) cells l(-1)). Analyses of Chl and carotenoid pigments determined by high-performance liquid chromatographic confirmed the presence of the divinyl Chl a characteristic of Prochlorococcus. The nano-micro- and picoplankton were 82% and 18% of total phytoplankton biomass (mug C l(-1)), respectively. In general, we concluded that the phytoplankton community structure and biomass on this cruise showed conditions similar to oligotrophic systems. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700022 L2 - LIGHT-ABSORPTION; ARABIAN SEA; CELL-VOLUME; FLUORESCENCE; PACIFIC; OCEAN; PROCHLOROCOCCUS; SYNECHOCOCCUS; VARIABILITY; IRRADIANCE SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):817-826 11700 UI - 4444 AU - Millan MJ AU - Gobert A AU - Roux S AU - Porsolt R AU - Meneses A AU - Carli M AU - Di Cara B AU - Jaffard R AU - Rivet JM AU - Lestage P AU - Mocaer E AU - Peglion JL AU - Dekeyne A AD - Ctr Rech Croissy, Inst Rech Servier, Dept Psychopharmacol, F-78290 Croissy Sur Seine, FranceInst Rech Servier, Dept Cerebral Pathol, F-78290 Croissy Sur Seine, FrancePorsolt & Partners Pharmacol, Boulogne, FranceInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoIst Ric Farmacol Mario Negri, Milan, ItalyUniv Bordeaux 1, CNRS, Unite Rech Associee 339, Lab Neurosci Comportementales & Cognit, F-33405 Talence, FranceInst Rech Int Servier, F-92415 Courbevoie, FranceInst Rech Servier, F-92150 Suresnes, FranceMillan, MJ, Ctr Rech Croissy, Inst Rech Servier, Dept Psychopharmacol, 125 Chemin Ronde, F-78290 Croissy Sur Seine, France TI - The serotonin(1A) receptor partial agonist S15535 [4-(benzodioxan-5-yl)1-(indan-2-yl)piperazine] enhances cholinergic transmission and cognitive function in rodents: A combined neurochemical and behavioral analysis AB - These studies examined the influence of the selective 5-hydroxytryptamine (serotonin) (5-HT)(1A) receptor partial agonist S15535 [4-(benzodioxan-5-yl)1-(indan-2-yl) piperazine] upon cholinergic transmission and cognitive function in rodents. In the absence of acetylcholinesterase inhibitors, S15535 dose-dependently (0.04-5.0 mg/kg s.c.) elevated dialysis levels of acetylcholine in the frontal cortex and dorsal hippocampus of freely moving rats. In the cortex, the selective 5-HT1A receptor antagonist WAY100,635 [(N-{2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl}-N-(2-pyridinyl) cyclo-hexanecarboxamide) fumarate] dose-dependently (0.0025-0.63) blocked this action of S15535. By contrast, in dorsal hippocampus, WAY100,635 mimicked the induction of acetylcholine release by S15535. In a social recognition paradigm, S15535 dose-dependently (0.16-10.0) improved retention, an action blocked by WAY100,635 (0.16), which was ineffective alone. Furthermore, S15535 dose-dependently (0.04-2.5) and WAY100,635 reversibly abolished amnesic properties of the muscarinic antagonist scopolamine (0.63) in this procedure. Cognitive deficits provoked by scopolamine in autoshaping and Morris water-maze procedures were likewise blocked by S15535 at doses of 0.63 to 10.0 and 0.16 to 2.5, respectively. In a two-platform spatial discrimination task, in which S15535 similarly abrogates cognitive deficits elicited by scopolamine, injection of S15535 (1.0 and 10.0 mug) into dorsal hippocampus blocked amnesic effects of the 5-HT1A agonist 8-hydroxy-2-dipropylaminotetralin (0.5 mug). Finally, S15535 (0.16-0.63) improved performance in a spatial, delayed nonmatching to sample model in mice, and in an operant delayed nonmatching to sample model in old rats, S15535 (1.25-5.0 mg/kg p.o.) increased response accuracy and reduced latency to respond. In conclusion, S15535 reinforces frontocortical and hippocampal release of acetylcholine and displays a broad-based pattern of procognitive properties. Its actions involve both blockade of postsynaptic 5-HT1A receptors and engagement of 5-HT1A autoreceptors MH - France MH - Italy MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 17 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0022-3565 UR - ISI:000223896100023 L2 - CORTICAL ACETYLCHOLINE-RELEASE; IN-VIVO MICRODIALYSIS; G-PROTEIN ACTIVATION; FREELY MOVING RATS; 5-HT1A RECEPTORS; INTRAHIPPOCAMPAL SCOPOLAMINE; PREFRONTAL CORTEX; WORKING-MEMORY; WATER-MAZE; S 15535 SO - Journal of Pharmacology and Experimental Therapeutics 2004 ;311(1):190-203 11701 UI - 4928 AU - Mills A AU - Valenzuela MA AD - Univ Strathclyde, Dept Pure & Appl Chem, Glasgow G1 1XL, Lanark, ScotlandInst Politecn Nacl, ESIQIE, Lab Catal & Mat, Mexico City 07738, DF, MexicoMills, A, Univ Strathclyde, Dept Pure & Appl Chem, 295 Cathedral St, Glasgow G1 1XL, Lanark, Scotland TI - The photo-oxidation of water by sodium persulfate, and other electron acceptors, sensitised by TiO2 AB - A number of different electron acceptors are tested for efficacy in the oxidation of water to oxygen, photocatalysed by titanium dioxide. The highly UV-absorbing metal ion electron acceptors, Ce4+ and Fe3+, appear ineffective at high concentration (10(-2) M), due to UV-screening, but more effective at lower concentrations (10(-3) M). The metal-depositing electron acceptor, Ag+, is initially effective, but loses activity upon prolonged irradiation due to metal deposition which promotes electron-hole recombination as well as UV-screening the titania particles. Most striking of the electron acceptors tested is persulfate, particularly in alkaline solution (0.1 M NaOH). The kinetics of the photo-oxidation of water by persulfate, photocatalysed by titania are studied as a function of pH, [S2O82-] and incident light intensity (I). The initial rate of water oxidation increases with pH, is directly proportional to the concentration of persulfate present and depends upon I-0.6. The TiO2/alkaline persulfate photosystem is robust and shows very little evidence of photochemical wear upon repeated irradiation. The results of this work are discussed with regard to previous work in this area and current mechanistic thinking. The formal quantum efficiency of the TiO2/alkaline persulfate photosystem was estimated as ca. 2%. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1010-6030 UR - ISI:000222693900005 L2 - TiO2;water oxidation;persulfate;photocatalysis;PHOTOCATALYTIC OXIDATION; HETEROGENEOUS PHOTOCATALYSIS; SEMICONDUCTOR PHOTOCATALYSIS; AQUEOUS SUSPENSION; TITANIUM-DIOXIDE; LIGHT-INTENSITY; WO3; DEGRADATION; HYDROGEN; O-2 SO - Journal of Photochemistry and Photobiology A-Chemistry 2004 ;165(1-3):25-34 11702 UI - 5248 AU - Minkovich VP AU - Kir'yanov AV AU - Sotsky AB AU - Sotskaya LI AD - Ctr Invest Opt, Leon 37150, Gto, MexicoNatl Acad Sci Belarus, Inst Appl Opt, Belarus 212973, RussiaMinkovich, VP, Ctr Invest Opt, Loma Bosque 115, Leon 37150, Gto, Mexico TI - Large-mode-area holey fibers with a few air channels in cladding: modeling and experimental investigation of the modal properties AB - Large-mode-area (LMA) silica holey fibers (HFs) are investigated both theoretically and experimentally with special attention paid to the effect of a limited number of air channels in the cladding on the main modal characteristics of the fibers. We applied the method of integral equations to model the LMA HF modes, and the results of our calculations are compared with the experimental data obtained for the so-called large-hole-large-spacing silica HFs. The effect of the relative holes' diameter in the case of a few layers in the cladding on the LMA HF properties is addressed in detail because this parameter basically determines the limits of single-mode waveguide operation and transmission loss of the fabricated LMA HFs. (C) 2004 Optical Society of America MH - Mexico|Guanajuato MH - Russia PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 11 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000221986700006 L2 - MICROSTRUCTURED OPTICAL-FIBERS; PHOTONIC CRYSTAL FIBERS; MULTIPOLE METHOD; V-PARAMETER; FIELD SO - Journal of the Optical Society of America B-Optical Physics 2004 ;21(6):1161-1169 11703 UI - 6131 AU - Minzoni AA AU - Smyth NF AU - Worthy AL AD - Univ Edinburgh, Sch Math, Edinburgh EH9 3JZ, Midlothian, ScotlandUniv Nacl Autonoma Mexico, IIMAS, Dept Math & Mech, FENOMEC, Mexico City 01000, DF, MexicoUniv Wollongong, Sch Math & Appl Sci, Wollongong, NSW 2522, AustraliaSmyth, NF, Univ Edinburgh, Sch Math, Kings Bldg, Edinburgh EH9 3JZ, Midlothian, Scotland TI - Evolution of two-dimensional standing and travelling breather solutions for the Sine-Gordon equation AB - In the present work the problem of the evolution of standing and travelling breather-type waves for the two-space-dimensional Sine-Gordon equation is studied asymptotically and numerically. This work was motivated by the work of Xin [Physica D 135 (2000) 345] on modulated travelling wave solutions and the work of Piette and Zakrzewski [Nonlinearity 11 (1998) 1103] on radially symmetric, periodic standing wave solutions of the two-dimensional Sine-Gordon equation. In the present work it is shown that the dispersive radiation shed by a pulse as it evolves ultimately stabilises it and that the internal breathing motion of the pulse is intimately involved in this process. It is further shown that the linear momentum shed in radiation by a travelling pulse ultimately stabilises it. In [Nonlinearity 11 (1998) 1103] it was shown numerically that radially symmetric, periodic solutions exist for very long times. The present results describe approximately the dynamical approach to these periodic solutions, starting from distorted initial conditions. These distorted initial conditions were not considered in [Nonlinearity 11 (1998) 1103]. Moreover in the present work the stability of periodic solutions evolving from non-radially symmetric initial conditions is studied. Solutions of the approximate equations are found to be in remarkable agreement with full numerical solutions. This agreement confirms the crucial role that radiation plays in the evolution of the breathers. (C) 2003 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000189215700001 L2 - Sine-Gordon equation;soliton;breather;modulation theory;stability SO - Physica D-Nonlinear Phenomena 2004 ;189(3-4):167-187 11704 UI - 6318 AU - Miranda-Diaz A AU - Rincon AR AU - Salgado S AU - Vera-Cruz J AU - Galvez J AU - Islas MC AU - Berumen J AU - guilar-Cordova E AU - rmendariz-Borunda J AD - Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Guadalajara 44281, Jalisco, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoAdvantagene Inc, San Diego, CA 92024, USAOPD Hosp Civil Guadalajara, Guadalajara, Jalisco, MexicoArmendariz-Borunda, J, Univ Guadalajara, CUCS, Inst Mol Biol Med & Gene Therapy, Apartado Postal 2-123, Guadalajara 44281, Jalisco, Mexico TI - Improved effects of viral gene delivery of human uPA plus biliodigestive anastomosis induce recovery from experimental biliary cirrhosis AB - Gene therapy may represent a new avenue for the development of multimodal treatment for diverse forms of cirrhosis. This study explores the potential benefits of combining adenovirus-mediated human urokinase-plasminogen activator (AdHuPA) gene delivery and biliodigestive anastomosis to enhance the therapeutic efficacy of each treatment alone for cholestatic disorders resulting in secondary biliary cirrhosis. In an experimental model of secondary biliary cirrhosis, application of 6 x 10(11) vp/kg AdHuPA adenovirus vector resulted in 25.8% liver fibrosis reduction and some improvement in liver histology. The relief of bile cholestasis by a surgical procedure (biliodigestive anastomosis) combined with AdHuPA hepatic gene delivery rendered a synergistic effect, with a substantial 56.9 to 42.9% fibrosis decrease. AdHuPA transduction resulted in clear-cut expression of human uPA protein detected by immunohistochemistry and induction of up-regulation in the expression of metalloproteinases MMP-3, MMP-9, and MMP-2. Importantly, functional hepatic tests, specifically direct bilirubin, were improved. Also, hepatic cell regeneration, rearrangement of hepatic architecture, ascites, and gastric varices improved in cirrhotic rats treated with AdHuPA but not in counterpart AdGFP cirrhotic animals. We believe this might represent a novel therapeutic strategy for human cholestatic diseases MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1525-0016 UR - ISI:000188659300010 L2 - bile-duct injury;fibrosis reversion;coadjuvant gene therapy;LIVER-TRANSPLANTATION; PROSTATE-CANCER; SERUM BILIRUBIN; FIBROSIS; THERAPY; RAT; RECONSTRUCTION; ATRESIA SO - Molecular Therapy 2004 ;9(1):30-37 11705 UI - 6152 AU - Miranda-Tello E AU - Fardeau ML AU - Thomas P AU - Ramirez F AU - Casalot L AU - Cayol JL AU - Garcia JL AU - Ollivier B AD - Univ Aix Marseille 1, IRD, IFR, BAIIM,ESIL, Marseille, FranceUniv Autonoma Metropolitana, Lab Tratamiento Aguas Residuales, Mexico City, DF, MexicoOllivier, B, Univ Aix Marseille 1, IRD, IFR, BAIIM,ESIL, UR 101 Extremophiles, Marseille, France TI - Petrotoga mexicana sp nov., a novel thermophilic, anaerobic and xylanolytic bacterium isolated from an oil-producing well in the Gulf of Mexico AB - A novel anaerobic, thermophilic, xylanolytic, motile rod-shaped bacterium with a sheath-like outer structure (toga) was isolated from a Mexican oil well in the Gulf of Mexico. Strain MET12(T) was a Gram-negative bacterium, reducing elemental sulfur, thiosulfate and sulfite to hydrogen sulfide. Its optimum growth conditions were 55 degreesC, pH 6(.)6, 3% NaCl and 0(.)15% MgCl2.6H(2)O. The DNA G + C content was 36(.)1 mol%. Phylogenetically, strain MET12(T) was related to members of genus Petrotoga, with similarities to Petrotoga mobilis, Petrotoga sibirica, Petrotoga miotherma and Petrotoga olearia varying from 97(.)6 to 98(.)8%. However DNA-DNA relatedness values between these species and strain MET12(T) were lower than 70%. As strain MET12(T) (=DSM 14811(T)=Clp 107371(T)) was genomically and phenotypically different from existing Petrotoga species, it is proposed as the type strain of a novel species, Petrotoga mexicana sp. nov MH - France MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000189154700024 L2 - CONTINENTAL PETROLEUM RESERVOIR; SEA HYDROTHERMAL VENT; ORDER THERMOTOGALES; RENATURATION RATES; DNA HYBRIDIZATION; WESTERN SIBERIA; NORTH-SEA; THIOSULFATE; ARCHAEA; MEMBERS SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():169-174 11706 UI - 6572 AU - Miranda J AU - Zepeda F AU - Galindo I AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Colima, Ctr Univ Ciencias Ambiente, San Sebastian 28045, SpainMiranda, J, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - The possible influence of volcanic emissions on atmospheric aerosols in the city of Colima, Mexico AB - An elemental composition study of atmospheric aerosols from the City of Colima, in the Western Coast of Mexico, is presented. Samples of PM15-PM2.5 and PM2.5 were collected with Stacked Filter Units (SFU) of the Davis design, in urban and rural sites, the latter located between the City of Colima and the Volcan de Colima, an active volcano. Elemental analyses were carried out using Particle Induced X-ray Emission (PIXE). The gravimetric mass concentrations for the fine fraction were slightly higher in the urban site, while the mean concentrations in the coarse fraction were equal within the uncertainties. High Cl contents were determined in the coarse fraction, a fact also observed in emissions from the Volcan de Colima by other authors. In addition to average elemental concentrations, cluster analysis based on elemental contents was performed, with wind speed and direction data, showing that there is an industrial contributor to aerosols North of the urban area. Moreover, a contribution from the volcanic emissions was identified from the grouping of S, Cl, Cu, and Zn, elements associated to particles emitted by the Volcan de Colima. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0269-7491 UR - ISI:000187780000012 L2 - atmospheric aerosols;volcanic emissions;PIXE;Colima volcano;City of Colima;AIRBORNE MEASUREMENTS; GAS EMISSIONS; ETNA VOLCANO; PARTICLES; ERUPTIONS; IMPACT SO - Environmental Pollution 2004 ;127(2):271-279 11707 UI - 2996 AU - Miranda MD AU - Munoz-Villanueva MC AU - Perez-Guijo VC AU - Castro MC AU - Morote G AU - Carrasco JA AU - Font P AU - Munoz E AU - Casasola J AU - Collantes E AD - Reins Sofia Univ Hosp, Rheumatol Res Unit, Cordoba, SpainCent Hosp, Mexico City, DF, Mexico TI - Differential characteristics of two cohorts (Spain-Mexico) of patients with recently started spondyloarthropathies MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551501419 SO - Annals of the Rheumatic Diseases 2004 ;63():421-421 11708 UI - 5372 AU - Miranda MI AU - McGaugh JL AD - Univ Calif Irvine, Ctr Neurobiol Learning & Mem, Dept Neurobiol & Behav, Irvine, CA 92697, USANatl Autonomous Univ Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoMiranda, MI, Univ Calif Irvine, Ctr Neurobiol Learning & Mem, Dept Neurobiol & Behav, Irvine, CA 92697 USA TI - Enhancement of inhibitory avoidance and conditioned taste aversion memory with insular cortex infusions of 8-Br-cAMP: Involvement of the basolateral amygdala AB - There is considerable evidence that in rats, the insular cortex (IC) and amygdala are involved in the learning and memory of aversively motivated tasks. The present experiments examined the effects of 8-Br-cAMP, an analog of cAMP, and oxotremorine, a muscarinic agonist, infused into the IC after inhibitory avoidance (IA) training and during the acquisition/consolidation of conditioned taste aversion (CTA). Posttraining infusion into the IC of 0.3 mug oxotremorine and 1.25 mug 8-Br-cAMP enhanced IA retention. Infusions of 8-Br-cAMP, but not oxotremorine, into the IC enhanced taste aversion. The experiments also examined whether noradrenergic activity in the basolateral amygdala (BLA) is critical in enabling the enhancement of CTA and IA memory induced by drug infusions administered into the IC. For both CTA and IA, ipsilateral infusions of beta-adrenergic antagonist propranolol administered into the BLA blocked the retention-enhancing effect of 8-Br-cAMP or oxotremorine infused into the IC. These results indicate that the IC is involved in the consolidation of memory for both IA and CTA, and this effect requires intact noradrenergic activity into the BLA. These findings provide additional evidence that the BLA interacts with other brain regions, including sensory cortex, in modulating memory consolidation MH - USA MH - Mexico|Distrito Federal PB - WOODBURY: COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT RP - NOT IN FILE U3 - TC 11 U4 - Neurosciences;Psychology, Experimental U5 - J;Article AV - English IS - 1072-0502 UR - ISI:000221737000011 L2 - LESIONS BLOCK; CONSOLIDATION; RAT; MODULATION; SYSTEMS; NUCLEUS; NOREPINEPHRINE; ACTIVATION; RECEPTORS; STORAGE SO - Learning & Memory 2004 ;11(3):312-317 11709 UI - 3427 AU - Miranda OG AU - Rashba TI AU - Rez AI AU - Valle JWF AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Valencia, Edificio Inst, CSIC, Inst Fis Corpuscular, E-46071 Valencia, SpainRussian Acad Sci, Inst Terr Magnetism Ionosphere & Radio Wave Propa, Troitsk 142190, Moscow Region, RussiaMiranda, OG, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Enhanced solar antineutrino flux in random magnetic fields AB - We discuss the impact of the recent KamLAND constraint on the solar antineutrino flux on the analysis of solar neutrino data in the presence of Majorana neutrino transition magnetic moments and solar magnetic fields. We consider different stationary solar magnetic field models, both regular and random, highlighting the strong enhancement in the antineutrino production rates that characterize turbulent solar magnetic field models. Moreover, we show that for such magnetic fields inside the Sun, one can constrain the intrinsic neutrino magnetic moment down to the level of mu(nu)less than or similar tofewx10(-12)mu(B) irrespective of details of the underlying turbulence model. This limit is more stringent than all current experimental sensitivities, and similar to the most stringent bounds obtained from stellar cooling. We also comment on the robustness of this limit and show that at most it might be weakened by 1 order of magnitude, under very unlikely circumstances MH - Mexico|Distrito Federal MH - Russia MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000226054700020 L2 - MATTER DENSITY PERTURBATIONS; SPIN-FLAVOR PRECESSION; NEUTRINO PROBLEM; ALFVENIC TURBULENCE; MSW SOLUTION; OSCILLATIONS; PROPAGATION; MOMENT; SUN SO - Physical Review D 2004 ;70(11): 11710 UI - 4797 AU - Miranda OG AU - Rashba TI AU - Rez AI AU - Valle JWF AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Valencia, Edificio Inst, CSIC, Inst Fis Corpuscular, E-46071 Valencia, SpainMiranda, OG, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Constraining the neutrino magnetic moment with antineutrinos from the Sun AB - We discuss the impact of different solar neutrino data on the spin-flavor-precession (SFP) mechanism of neutrino conversion. We find that, although detailed solar rates and spectra allow the SFP solution as a subleading effect, the recent KamLAND constraint on the solar antineutrino flux places stronger constraints on this mechanism. Moreover, we show that for the case of random magnetic fields inside the Sun, one obtains a more stringent constraint on the neutrino magnetic moment down to the level of mu(nu)less than or similar tofewx10(-12)mu(B), similar to bounds obtained from star cooling MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000222996800008 L2 - SPIN-FLAVOR PRECESSION; SOLAR; FIELDS; DYNAMO; VIOLATION; ROTATION; ZONE SO - Physical Review Letters 2004 ;93(5): 11711 UI - 5235 AU - Mireles A AU - Solis C AU - Andrade E AU - Lagunas-Solar M AU - Pina C AU - Flocchini RG AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Davis, Crocker Nucl Lab, Davis, CA 95616, USAMireles, A, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Heavy metal accumulation in plants and soil irrigated with wastewater from Mexico city AB - Analysis by PIXE has been successfully employed in the study of environmental samples since it is possible to detect in a simple and fast way a high number of elements (heavier than Na) with a high sensitivity. In this work the PIXE method has been applied to study the extent of heavy metal contamination in soils and plants from Mixquiahuala, Hidalgo and Tlahuac, D.F. These two agricultural sites have been irrigated with wastewater from Mexico City for more than 50 years. The use of wastewater increased the crop productivity; however, in the areas irrigated for long periods of time, deterioration is now observed and only certain plant species can be grown. In this work, we present the range of variation that was observed for metals such as Fe, Cr, Co, Mn, Ni, Cu, Zn and Pb. Some of these elements were found at concentrations above the potentially hazardous levels in soils; however, they accumulated in plants to a lower extent, probably because of the physical and chemical properties of soils that prevent their translocation to plants. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000221895800036 L2 - PIXE;soil contamination;trace metals;heavy metals;wastewater SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2004 ;219-20():187-190 11712 UI - 4574 AU - Mitchell DK AU - Walter JE AU - Jiang X AU - Guerrero ML AU - Meinzen-Derr J AU - Primeggia J AU - Pickering LK AU - Altaye M AU - Ruiz-Palacios G AU - Morrow AL AD - Ctr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoChildrens Hosp, Med Ctr, Cincinnati, OH 45229, USAEastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23501, USA TI - Molecular epidemiology of human astrovirus infections among children in a cohort study in Mexico City MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591100344 SO - Pediatric Research 2004 ;55(4):58A-58A 11713 UI - 5246 AU - Mock C AU - Quansah R AU - Krishnan R AU - rreola-Risa C AU - Rivara F AD - Univ Washington, Harborview Injury Prevent & Res Ctr, Seattle, WA 98195, USAKwame Nkrumah Univ Sci & Technol, Kumasi, GhanaUniv Malaya, Kuala Lumpur, MalaysiaInst Tecnol & Estudios Super, Monterrey, MexicoMock, C, Box 359960, Seattle, WA 98104, USA TI - Strengthening the prevention and care of injuries worldwide AB - The global burden of injuries is enormous, but has often been overlooked in attempts to improve health. We review measures that would strengthen existing efforts to prevent and treat injuries worldwide. Scientifically-based efforts to understand risk factors for the occurrence of injury are needed and they must be translated into prevention programmes that are well designed and assessed. Areas for potential intervention include environmental modification, improved engineering features of motor vehicle and other products, and promotion of safe behaviours through social marketing, legislation, and law enforcement. Treatment efforts need to better define the most high-yield services and to promote these in the form of essential health services. To achieve these changes, there is a need to strengthen the capacity of national institutions to do research on injury control; to design and implement countermeasures that address injury risk factors and deficiencies in injury treatment; and to assess the effectiveness of such countermeasures. Although much work remains to be done in high-income countries, even greater attention is needed in less-developed countries, where injury rates are higher, few injury control activities have been undertaken, and where most of the world's population lives. In almost all areas, injury rates are especially high in the most vulnerable sections of the community, including those of low socioeconomic status. Injury control activities should, therefore, be undertaken in a context of attention to human rights and other broad social issues MH - Ghana MH - Malaysia MH - Mexico|Nuevo Leon MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 23 U4 - Medicine, General & Internal U5 - J;Review AV - English IS - 0140-6736 UR - ISI:000222268300023 L2 - PREHOSPITAL TRAUMA CARE; LIFE-SUPPORT PROGRAM; ROAD TRAFFIC INJURIES; RANDOMIZED CONTROLLED-TRIAL; VEHICLE CRASH MORTALITY; DEVELOPING-COUNTRIES; SYSTEM EFFECTIVENESS; DOMESTIC VIOLENCE; MEDICAL-SERVICES; CHILDHOOD BURNS SO - Lancet 2004 ;363(9427):2172-2179 11714 UI - 5866 AU - Moctezuma-Berthier A AU - Vizika O AU - Thovert JF AU - Adler PM AD - Univ Paris 06, Inst Phys Globe, F-75252 Paris 05, FranceInst Francais Petr, F-92506 Rueil Malmaison, FranceInst Mexicano Petr, Mexico City 07730, DF, MexicoSP2MI, PTM LCD, F-86960 Futuroscope 05, FranceMoctezuma-Berthier, A, Univ Paris 06, Inst Phys Globe, Pl Jussieu, F-75252 Paris 05, France TI - One- and two-phase permeabilities of vugular porous media AB - The single and double phase macroscopic permeabilities of bimodal reconstructed porous media have been studied. The structure of these bimodal media is characterized by the micro and macroporosities (vug system) and by the micro and macrocorrelation lengths l(p) and l(v). For a single phase, if the vugular system does not percolate, it is shown that the absolute permeability K mainly depends on l(p) and very little on the other parameters. However, when the vugs percolate, K is also influenced by the density of vugs. For double phase calculations (in strong wettability conditions), it is shown that a vuggy percolating system affects mainly the nonwetting phase permeability. Moreover, the relative permeabilities for a nonpercolating vuggy system are only slightly influenced by the porosity distribution. These predictions are in good agreement with some experimental data obtained with limestones MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0169-3913 UR - ISI:000220454900006 L2 - TRANSPORT-PROPERTIES; GEOMETRY; FLOW SO - Transport in Porous Media 2004 ;56(2):225-244 11715 UI - 4620 AU - Moeller-Chavez G AU - Segui-Amortegui L AU - franca-Burriel O AU - Escalante-Estrada V AU - Pozo-Roman F AU - Rivas-Hernandez A AD - Mexican Inst Water Technol, Wastewater Treatment Dept, Jiutepec 62550, Morelos, MexicoUniv Politecn Catalunya, Dept Agribusiness Biotechnol Engn, E-08036 Barcelona, SpainMoeller-Chavez, G, Mexican Inst Water Technol, Wastewater Treatment Dept, Paseo Cuauhnahuac 8532, Jiutepec 62550, Morelos, Mexico TI - Water reuse in the Apatlaco River Basin (Mexico): a feasibility study AB - The aim of this work is to determine the technical and economic feasibility of implementing different reclamation and reuse projects that improve the quality of the Apatlaco river basin located in the central part of Mexico. A special methodology based on a decision support system was developed. This methodology allows to decide if it is convenient or not to finance a reclamation or reuse project for the most common water uses in the basin. This methodology is based on the net present value criteria (NPV) of the effective cash flow during the useful life of the project. The results obtained reveal a technical and economical feasibility for industrial reuse in Jiutepec and for agricultural reuse in Zacatepec and Emiliano Zapata. On the other hand, sanitation projects are not feasible in all cases analyzed. Theretore, Mexican Regulation (Ley Federal de Derechos en Materia cle Agua) as currently implemented, does not promote and support this kind of projects MH - Mexico|Morelos MH - Spain PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Review AV - English IS - 0273-1223 UR - ISI:000223394900045 L2 - analysis of projects;economic analysis;feasibility;project evaluation;reclamation;reuse;wastewater treatment SO - Water Science and Technology 2004 ;50(2):329-337 11716 UI - 5483 AU - Mohammad A AU - Mitra B AU - Khan AG AD - Univ Western Sydney, Sch Sci Food & Hort, Penrith, NSW 1797, AustraliaUniv Delhi, Ctr Environm Management Degraded Ecosyst, New Delhi, IndiaMohammad, A, UNAM, Dept Biol Mol Plantas, Inst Biotechnol, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Effects of sheared-root inoculurn of Glomus intraradices on wheat grown at different phosphorus levels in the field AB - Growth and yield potential of wheat inoculated with the arbuscular mycorrhizal fungus Glomus intraradices were investigated at different phosphorus levels under field conditions. Surface sterilized wheat (Triticum aestivum var. Swift) was infected with sheared-root inoculum at the rate of 0.5 g dry weight per 1000 seed and sown in P-deficient loamy and slightly acidic (pH 5.5) field plots fertilized with 0, 5, 10 and 20 kg ha(-1) of commercial P. Plants inoculated had significantly higher dry weight and yield compared to controls. Mycorrhization of roots in both inoculated and control plants increased with P-level but decreased over time at higher P-levels. The mycorrhiza-mediated growth effect was higher at 5 and 10 kg than at 20 kg P ha(-1) in terms of plant dry weight, number of grain per spike, and 1000 grain weight. It is suggested that sheared-root inoculum of G. intraradices may contribute to reducing P fertilizer applications. (C) 2003 Elsevier B.V. All rights reserved MH - Australia MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000221550300017 L2 - arbuscular mycorrhiza;indigenous AM fungi;Glomus intraradices;aeroponic culture;ultrasonic nebulizer inoculum;wheat;phosphorus;field;ARBUSCULAR MYCORRHIZAL FUNGI; P LEVELS; INOCULATION; FERTILIZER; YIELD; SOIL SO - Agriculture Ecosystems & Environment 2004 ;103(1):245-249 11717 UI - 4021 AU - Mohler V AU - Lukman R AU - Ortiz-Islas S AU - William M AD - Tech Univ Munich, Ctr Life & Food Sci Weihenstephan, Dept Plant Sci, Chair Agron & Plant Breeding, D-85350 Freising Weihenstephan, GermanyCIMMYT, Mexico City 06600, DF, MexicoJohn Innes Ctr Plant Sci Res, Dept Crop Genet, Norwich NR4 7UH, Norfolk, EnglandMohler, V, Tech Univ Munich, Ctr Life & Food Sci Weihenstephan, Dept Plant Sci, Chair Agron & Plant Breeding, Hochanger 2, D-85350 Freising Weihenstephan, Germany TI - Genetic and physical mapping of photoperiod insensitive gene Ppd-B1 in common wheat AB - Photoperiod response is a major determinant of duration of growing stages in wheat. Conscious selection for these photoperiod response genes in plant breeding programs will yield genotypes with better adaptation to diverse environments. To provide a starting point for the development of molecular markers useful for the selection process, genetic maps around the photoperiod insensitive gene Ppd-B1 were built employing three segregating populations. Of 25 markers that were selected for the Ppd-B1 region, only two could be mapped across all three populations. In pairwise comparisons, the extent of transferable markers ranged from three to eight. Recombination frequencies of markers distal to Ppd-B1 were more homogeneous than those of proximal markers. This finding suggested a closer proximity of Ppd-B1 to the markers that were mapped distal to breakpoint 0.83 in the physical map of chromosome 2BS MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000224911400004 L2 - breakpoint interval mapping;genetic mapping;molecular markers;photoperiod response;Ppd-B1;wheat;EUROPEAN WINTER WHEATS; CHROMOSOMAL LOCATION; GLOBAL IMPROVEMENT; MARKERS; REGIONS; AFLP; IDENTIFICATION; ADAPTABILITY; PROSPECTS; BARLEY SO - Euphytica 2004 ;138(1):33-40 11718 UI - 4891 AU - Moiseev AV AU - Valdes JR AU - Chavushyan VH AD - Special Astrophys Observ, Karachaevo 369167, RussiaInst Nacl Astrofis Opt & Elect, Puebla, MexicoMoiseev, AV, Special Astrophys Observ, Karachaevo 369167, Russia TI - Structure and kinematics of candidate double-barred galaxies AB - Results of optical and NIR spectral and photometric observations of a sample of candidate double-barred galaxies are presented. Velocity fields and velocity dispersion maps of stars and ionized gas, continuum and emission-line images were constructed from integral-field spectroscopy observations carried out at the 6 m telescope (BTA) of SAO RAS, with the MPFS spectrograph and the scanning Fabry-Perot Interferometer. NGC 2681 was also observed with the long-slit spectrograph of the BTA. Optical and NIR images were obtained at the BTA and at the 2.1 m telescope (OAN, Mexico). High-resolution images were retrieved from the HST data archive. Morphological and kinematic features of all 13 sample objects are described in detail. Attention is focused on the interpretation of observed non-circular motions of gas and stars in circumnuclear (one kiloparsec-scale) regions. We have shown first of all that these motions are caused by the gravitational potential of a large-scale bar. NGC 3368 and NGC 3786 have nuclear bars only, their isophotal twist at larger radii being connected with the bright spiral arms. Three cases of inner polar disks in our sample (NGC 2681, NGC 3368 and NGC 5850) are considered. We found ionized-gas counter-rotation in the central kiloparsec of the lenticular galaxy NGC 3945. Seven galaxies (NGC 470, NGC 2273, NGC 2681, NGC 3945, NGC 5566, NGC 5905, and NGC 6951) have inner mini-disks nested in large-scale bars. Minispiral structures occur often in these nuclear disks. It is interesting that the majority of the observed, morphological and kinematical, features in the sample galaxies can be explained without the secondary bar hypothesis. Thus we suggest that a dynamically independent secondary bar is a rarer phenomenon than follows from isophotal analysis of the images only MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0004-6361 UR - ISI:000222897700009 L2 - galaxies : kinematics and dynamics;galaxies : spiral;techniques : spectroscopic;VELOCITY DISPERSION DROPS; SPIRAL GALAXIES; DISK GALAXIES; SURFACE PHOTOMETRY; MOLECULAR GAS; STELLAR KINEMATICS; NEUTRAL HYDROGEN; NUCLEAR RINGS; INNER DISKS; DOUBLE BARS SO - Astronomy & Astrophysics 2004 ;421(2):433-453 11719 UI - 5230 AU - Molchanov VV AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Casey D AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Ferbel T AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - Hammer C AU - Kangling H AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Yunshan L AU - Luksys M AU - Lungov T AU - Maleev VP AU - Mao D AU - Chensheng M AU - Zhenlin M AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Morelos A AU - Mukhin VA AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - Onel Y AU - Ozel E AU - Ozkorucuklu S AU - Penzo A AU - Petrenko SV AU - Pogodin P AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Slattery P AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Zhao WH AU - Zheng SC AU - Zhu ZH AU - Zielinski M AU - Zukanovich-Funchal R AD - Inst High Energy Phys, Protvino, RussiaBall State Univ, Muncie, IN 47306, USABogazici Univ, TR-80815 Bebek, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Tel Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Rochester, Rochester, NY 14627, USAUniv Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyMolchanov, VV, Inst High Energy Phys, Protvino, Russia TI - Upper limit on the decay Sigma(1385)(-) -> Sigma(-)gamma and cross section for gamma Sigma(-) -> Lambda pi(-) AB - Coherent Lambdapi(-) production on Pb of 600 GeV Sigma(-) hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Gamma[Sigma(1385)(-) --> Sigma(-) gamma] < 9.5 keV, and estimate the cross section for gamma Sigma(-) --> Lambdapi(-) at roots approximate to 1.385 GeV to be 56 +/- 16 mub. Crown Copyright (C) 2004 Published by Elsevier B.V. All rights reserved MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000222037900006 L2 - hyperon radiative decay;Primakoff effect;NUCLEAR-COULOMB-FIELD; RADIATIVE DECAYS; ELECTROMAGNETIC DECAYS; COHERENT PRODUCTION; QUARK-MODEL; DECUPLET HYPERONS; MAGNETIC-MOMENTS; LIGHT MESONS; BARYONS; TRANSITIONS SO - Physics Letters B 2004 ;590(3-4):161-169 11720 UI - 6503 AU - Molina-Freaner F AU - Rojas-Martinez A AU - Fleming TH AU - Valiente-Banuet A AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Func & Aplicada, Hermosillo 83000, Sonora, MexicoUniv Miami, Dept Biol, Coral Gables, FL 33124, USAUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Func & Aplicada, Mexico City 04510, DF, MexicoMolina-Freaner, F, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Func & Aplicada, Apartado Postal 1354, Hermosillo 83000, Sonora, Mexico TI - Pollination biology of the columnar cactus Pachycereus pecten-aboriginum in north-western Mexico AB - Columnar cacti in tropical deserts depend on nectar-feeding bats for their reproduction while species from extra-tropical deserts show a relatively generalized pollination system with both nocturnal and diurnal pollinators. Pachycereus pecten-aboriginum is a columnar cactus with a broad distribution along the Pacific coast of Mexico, from Oaxaca to Sonora. Along its distribution, the nectar-feeding bat, Leptonycteris curasoae, changes from resident within the tropics to migratory in the Sonoran desert. If bat unpredictability has been an important force in the evolution of pollination systems in columnar cacti, P. pecten-aboriginum is expected to show a relatively generalized system in northern populations. We studied the pollination biology of P. pecten-aboriginum in two northern populations in the state of Sonora. Hand pollination experiments showed that this species has a self-incompatible, hermaphroditic breeding system. Although flowers open at night, they remain open and continue secreting nectar during the morning, allowing visitation by both nocturnal and diurnal pollinators. One population showed evidence of strong pollinator limitation while the results from both populations indicated that diurnal pollinators are more important than nocturnal pollinators. These results are discussed in terms of specialization vs. generalization in the pollination biology of columnar cacti in tropical and extra-tropical deserts. (C) 2003 Elsevier Science Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000187882400009 L2 - columnar cacti;Pachycereus pecten-aboriginum;pollination biology;Sonoran desert;LEPTONYCTERIS-CURASOAE; PRINGLEI CACTACEAE; CHROMOSOME-NUMBERS; TEHUACAN VALLEY; AMERICA; EVOLUTION; MIGRATION; SYSTEMS; FITNESS; PLANTS SO - Journal of Arid Environments 2004 ;56(1):117-127 11721 UI - 3465 AU - Molina-Ochoa J AU - Carpenter JE AU - Lezama-Gutierrez R AU - Foster JE AU - Gonzalez-Ramirez M AU - ngel-Sahagun CA AU - Farias-Larios J AD - Univ Colima, Fac Ciencias Biol & Agropecuarias, Colima 28100, MexicoUSDA ARS, Crop Protect & Management Res Lab, Tifton, GA 31793, USAUniv Nebraska, Dept Entomol, Lincoln, NE 68583, USAMolina-Ochoa, J, Univ Colima, Fac Ciencias Biol & Agropecuarias, Apartado Postal 36, Colima 28100, Mexico TI - Natural distribution of hymenopteran parasitoids of Spodoptera frugiperda (Lepidoptera : Noctuidae) larvae in Mexico AB - A survey of parasitoids of fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith), larvae was conducted in six Mexican states during August and September 2000. Thirteen genera of hymenopteran parasitoids were recovered representing the following 3 families, Braconidae: Aleoides, Chelonus, Cotesia, Glyptapanteles, Homolobus, and Meteorus; Ichneumonidae: Campoletis, Eiphosoma, Ophion, and Pristomerus; and Eulophidae: Aprostocetus, Eaplectrus, and Horismenus. Out of 5591 FAW larvae collected, 772 produced parasitoids, for a parasitism rate of 13.8%. The highest rate of parasitism from a single collection was 42.2%, representing three species of parasitoids in Michoacan. Chelonus insularis Cresson was the most widely distributed species occurring in 45.3% of the locations. Pristomerus spinator (F.), and Meteorus laphygmae (Viereck), exhibited the highest rates of parasitism for a single collection with 22.2% and 22.1%, in Sinaloa, and Michoacan, respectively. The results supported the hypothesis that natural distribution and rates of parasitism of FAW larvae may be related to more diverse habitats with more forests, orchards, and pastures near to cornfields MH - Mexico|Colima MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000226262600006 L2 - fall armyworm;Chelonus;Pristomerus;Meteorus;Ophion;Campoletis;corn;survey;FALL ARMYWORM LEPIDOPTERA; HOST STRAINS; INSECTICIDE RESISTANCE; CORN GENOTYPES; COLIMA; STATES; PARASITIZATION; ICHNEUMONIDAE; CHLORPYRIFOS; BERMUDAGRASS SO - Florida Entomologist 2004 ;87(4):461-472 11722 UI - 5934 AU - Molina-Sosa A AU - Galvan-Espinosa H AU - Gabriel-Guzman J AU - Valle RF AD - Northwestern Univ, Sch Med, Dept Obstet & Gynecol, Chicago, IL 60611, USAHosp Gen Dr Manuel Velasco Suarez, Zimatlan, Oaxaca, MexicoValle, RF, Northwestern Univ, Sch Med, Dept Obstet & Gynecol, Chicago, IL 60611 USA TI - Self-inflicted cesarean section with maternal and fetal survival AB - An unusual case of self-inflicted cesarean section with maternal and child survival is presented. No similar event was found in an Internet literature search. Because of a lack of medical assistance and a history of fetal death in utero, a 40-year-old multiparous woman unable to deliver herself alone vaginally sliced her abdomen and uterus and delivered her child. She was transferred to a hospital where she underwent repair of the incisions and had to remain hospitalized. Mother and child survived the event. Unusual and extraordinary measures to preserve their offspring sometimes moves women to extreme decisions endangering their own lives. Social, educational, and health measures should be instituted all over the world, particularly in rural areas of developing countries, to avoid such extreme events. (C) 2003 International Federation of Gynecology and Obstetrics. Published by Elsevier Ireland Ltd. All rights reserved MH - USA MH - Mexico|Oaxaca PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 1 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0020-7292 UR - ISI:000220352800021 L2 - cesarean section;emergency cesarean;self-inflicted cesarean SO - International Journal of Gynecology & Obstetrics 2004 ;84(3):287-290 11723 UI - 4813 AU - Molina JR AU - Espinosa-Luna R AU - Adachi S AD - Ctr Invest Opt, AC, Guanajuato 37150, MexicoGunma Univ, Fac Engn, Dept Elect Engn, Gunma 3768515, JapanMolina, JR, Ctr Invest Opt, AC, Loma Bosque 115,Colonia Lomas Campestre, Guanajuato 37150, Mexico TI - Photoreflectance study in the E-1 and E-1+Delta(1) transition regions of ZnTe and CdTe and in the E-0 and E-0+Delta(0) transition regions of GaP (vol 37, pg 2047, 2004) MH - Japan MH - Mexico|Guanajuato PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Correction AV - English IS - 0022-3727 UR - ISI:000223026100021 L2 - E(1) SO - Journal of Physics D-Applied Physics 2004 ;37(14):2047-2047 11724 UI - 3890 AU - Mollah MYA AU - Morkovsky P AU - Gomes JAG AU - Kesmez M AU - Parga J AU - Cocke DL AD - Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710, USAUniv Dhaka, Dept Chem, Dhaka 1000, BangladeshKaspar Electroplating Corp, Shiner, TX 77984, USAInst Technol Saltillo, Dept Met & Mat Sci 5, Saltillo 25000, Coahuila, MexicoCocke, DL, Lamar Univ, Gill Chair Chem & Chem Engn, POB 10022, Beaumont, TX 77710 USA TI - Fundamentals, present and future perspectives of electrocoagulation AB - Electrocoagulation is an electrochemical wastewater treatment technology that is currently experiencing both increased popularity and considerable technical improvements. There has been relatively little effort to better understand the fundamental mechanisms of the processes, particularly those that could provide design parameters to optimize the performances of this relatively simple and inexpensive technique. In a research programme to delineate the mechanisms of the fundamental processes involved in, the authors have realized that the technology has been insufficiently reviewed with emphasis on the fundamentals and their relationship to the performance of this technology. This paper presents an in-depth discussion and consideration of the factors that need to be addressed for optimum performance of this technology. Recent improvements of this technique and the theoretical model studies are also reviewed. (C) 2004 Published by Elsevier B.V MH - Bangladesh MH - Mexico|Coahuila MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 32 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0304-3894 UR - ISI:000225148200024 L2 - electrocoagulation cells;electrolysis;bipolar electrodes;wastewater treatment;theoretical models;DYE WASTE-WATER; ELECTROCHEMICAL TREATMENT; TEXTILE DYE; ORGANIC POLLUTANTS; PT/TI ELECTRODE; COAGULATION; OXIDATION; ELECTROFLOTATION; ENVIRONMENT; SEPARATION SO - Journal of Hazardous Materials 2004 ;114(1-3):199-210 11725 UI - 5639 AU - Monarrez-Espino J AU - Greiner T AU - Hoyos RC AD - Uppsala Univ, Int Nutr Res Grp, Dept Womens & Childrens Hlth, Uppsala, SwedenInst Mexicana Seguro Social, Unidad Invest Epidemiol, Jalisco, MexicoInst Mexicana Seguro Social, Serv Salud Adolescente, Jalisco, MexicoMonarrez-Espino, J, Univ Uppsala, Univ Hosp, Dept Womens & Childrens Hlth, Entrance 11, S-75185 Uppsala, Sweden TI - Perception of food and body shape as dimensions of western acculturation potentially linked to overweight in Tarahumara women of Mexico AB - A recent survey in northern Mexico found that 52.8% of adult Tarahumara women were overweight. A process of "de-Indianization" of their diet was hypothesized. The present study aimed at exploring food and body shape perceptions as dimensions contributing to the role that Western acculturation could be playing in increasing overweight in this isolated indigenous population. Data were obtained from structured interviews of a type commonly used in cognitive anthropology. Partial rank ordering of photographic series' depicting dishes, food preparation methods and drinks, and constrained pile sorting of photographs portraying Tarahumara women arranged from the thinnest to the fattest were used to assess food shape perceptions, respectively. Data analytic techniques employed included cultural consensus, tabu search clustering, and multidimensional scaling. Respondents judged mestizo and Western foods as tastier than traditional foods. Spanish language capacity was linked to preferences for mestizo and Western foods and for fatter body shapes as ideals for beauty, health, and motherhood. Thin-normal women were considered the most industrious. Speaking Spanish emerged as the only clear element of acculturation that could be defined MH - Mexico|Jalisco MH - Sweden PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0367-0244 UR - ISI:000221024100003 L2 - acculturation;body shape;food;Mexico;overweight;Tarahumara;westernization;CONSENSUS THEORY; PREVALENCE; INDIANS; AGE SO - Ecology of Food and Nutrition 2004 ;43(3):193-212 11726 UI - 6167 AU - Monarrez-Espino J AU - Martinez H AU - Martinez V AU - Greiner T AD - Univ Uppsala, Dept Womens & Childrens Hlth, S-75185 Uppsala, SwedenInst Mexicano Seguro Social, Coordinac Invest Salud, Mexico City, DF, MexicoInst Nacl Indigenista, Ctr Coordinador Indigensita Tarahumara, Mexico City, DF, MexicoMonarrez-Espino, J, Univ Uppsala, Univ Hosp, Dept Womens & Childrens Hlth, Entrance 11, S-75185 Uppsala, Sweden TI - Nutritional status of indigenous children at boarding schools in northern Mexico AB - Objective: To assess the nutritional status of Tarahumara children at indigenous boarding schools. Design: Cross-sectional comprehensive nutritional survey. Setting: The schools sampled were located in indigenous municipalities of the northern Mexican state of Chihuahua. Subjects: The study was carried out in 2001 among 331 children aged 6-14 y from a sample of five schools. Anthropometric measurements, a thyroid exam and capillary haemoglobin levels were obtained from the children. Serum concentrations of ferritin, iron, total iron-binding capacity, vitamin B-12, folic acid and zinc were collected from a subsample of 100 children. Results: The prevalence of wasting and overweight (children 6-9 y) was 1.1 and 4.6%, respectively, and of underweight, risk of overweight and overweight (10-14 y) was 3.2, 5.1 and 0.6%, respectively. Stunting (6-12 y) was present in 22.3% of the children. The total goitre rate was 5.4%. The prevalence of anaemia was 13% (boys 11.4, girls 14.5%). Overall, 24.2% of the children were iron deficient (depletion 11.1%, deficient erythropoiesis 3%, iron deficiency anaemia 10.1%). No child had folic acid values <3 ng/ml, but 20.2% had low (<200 mg/dl) and 27.3% marginal (200-300 mug/dl) vitamin B-12 levels, and 80.2% had low zinc concentrations (<60 μg/dl). Conclusions: Nutritional underweight and stunting were similar to those reported in rural localities at the national level, but overweight was less prevalent in children aged 10-14 y. Various micronutrient deficiencies was identified including zinc and vitamin B-12, but the prevalence of iron and folic acid deficiency was lower than expected. These results suggest that Tarahumara children attending boarding schools may be the better-off children from these extremely poor and marginalized areas. Sponsorship: Swedish Agency for Research Cooperation with Developing Countries and the Mexican Social Security Institute MH - Mexico|Distrito Federal MH - Sweden PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 5 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0954-3007 UR - ISI:000189220000018 L2 - anaemia;anthropometry;schoolchildren;iron deficiency;mexico;micronutrients;tarahumara;IRON-DEFICIENCY; REPRODUCTIVE-AGE; POPULATION; ABSORPTION; DIAGNOSIS; ANEMIA; WOMEN; VITAMIN-B-12; ACID; ZINC SO - European Journal of Clinical Nutrition 2004 ;58(3):532-540 11727 UI - 3896 AU - Monneveux P AU - Reynolds MP AU - Gonzalez-Santoyo H AU - Pena RJ AU - Mayr L AU - Zapata F AD - CIMMYT, Wheat Program, Mexico City 06600, DF, MexicoMonneveux, P, INRA, ENSA, 2 Pl Viala, F-34060 Montpellier, France TI - Relationships between grain yield, flag leaf morphology, carbon isotope discrimination and ash content in irrigated wheat AB - The purpose of this study was to examine how differences in leaf angle, leaf rolling (LR) and glaucousness (GL) can modify yield components and leaf physiological traits in wheat. A set of 167 lines derived from a cross between two high-yielding bread wheat cultivars differing for these traits was grown under flood irrigation and high evaporative demand in the north-west of Mexico. Area, mass per unit area and chlorophyll content of the flag leaf were assessed. Carbon isotope discrimination (Delta) and ash content (m(a)) were also measured. A significant correlation was found between grain yield (GY) and both Delta and m(a) suggesting that, despite well-watered conditions, leaf stomatal conductance was the main yield-limiting factor. Leaf posture and LR did not significantly affect yield, Delta and m(a). Higher grain weight was noted, however, in lines with droopy flag leaves. Erect leaves had higher mass per unit area. GL was associated with a significant increase in GY and grain weight. Glaucous lines also had higher Delta and m(a), suggesting higher transpiration rate and lower transpiration efficiency. The study confirms that Delta and m(a) represent promising criteria for GY in wheat and provides evidence that GL can contribute to higher yield, even under irrigated conditions MH - France MH - Mexico|Distrito Federal PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0931-2250 UR - ISI:000225150600005 L2 - ash content;carbon isotope discrimination;glaucousness;leaf posture;leaf rolling;Triticum aestivum L.;DURUM-WHEAT; MEDITERRANEAN CONDITIONS; USE EFFICIENCY; GAS-EXCHANGE; WATER-STRESS; PHOTOSYNTHESIS; TRANSPIRATION; GLAUCOUSNESS; GENOTYPES; PRODUCTIVITY SO - Journal of Agronomy and Crop Science 2004 ;190(6):395-401 11728 UI - 5019 AU - Montalvo TR AU - Furetta C AU - Kitis G AU - Azorin J AU - Vite RM AD - Escuela Super Ingn Mecan & Elect, Mexico City 04530, DF, MexicoUniv Roma La Sapienza, Dept Phys, I-00185 Rome, ItalyAristotle Univ Thessaloniki, Phys Nucl Lab, GR-54006 Thessaloniki, GreeceMontalvo, TR, Escuela Super Ingn Mecan & Elect, Mexico City 04530, DF, Mexico TI - Influence of heating rate on thermoluminescence of zirconium oxide UV irradiated AB - The influence of the heating rate on the thermoluminescence (TL) emission induced by UV radiation in zirconium oxide has been investigated. Various heating rates from 2 to 30 K/s were used. Trap parameters, i.e. activation energy, E , pre-exponential factor, s , and the kinetics order, b , were also determined using the peak shape method. The temperature lag between the TL sample and the heating strip, which emerged as the heating rate increased, was corrected by computer simulation MH - Greece MH - Italy MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Nuclear Science & Technology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1042-0150 UR - ISI:000222350700003 L2 - thermoluminescence;UV;zirconium oxide;kinetics parameters;GLOW CURVES SO - Radiation Effects and Defects in Solids 2004 ;159(4):217-222 11729 UI - 5882 AU - Montero-Solis C AU - Gonzalez-Ceron L AU - Rodriguez MH AU - Cirerol BE AU - Zamudio F AU - Possanni LD AU - James AA AU - de la Cruz Hernandez-Hernandez AD - IPN, Ctr Invest & Estudios Avanzados, Dept Expt Pathol, Mol Entomol Lab, Mexico City 07360, DF, MexicoInst Nacl Salud Publ, Ctr Invest Paludismo, Tapachula, Chiapas, MexicoInst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Cuernavaca, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62191, Morelos, MexicoUniv Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92717, USAde la Cruz Hernandez-Hernandez, F, IPN, Ctr Invest & Estudios Avanzados, Dept Expt Pathol, Mol Entomol Lab, Av IPN 2508,Col San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - Identification and characterization of gp65, a salivary-gland-specific molecule expressed in the malaria vector Anopheles albimanus AB - A group of salivary-gland-specific proteins, designated gp65, were identified in the mosquito Anopheles albimanus. Two-dimensional gel electrophoresis resolved this group into at least four molecules with pI 6.4-6.5. The N-terminal amino acid sequence was determined for the major species, gp65-1, and degenerate oligonucleotide primers were used to amplify a specific probe for library screening. A 1312 bp cDNA clone encoding a predicted translation product of 386 amino acids was recovered. gp65-1 is expressed abundantly in the medial and distal-lateral lobes of the adult female glands, and is secreted in the saliva. The amino acid sequence has potential sites for N-glycosylation, phosphorylation and myristylation, and is similar to a number of proteins of unknown function from other mosquito species MH - Mexico|Chiapas MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Entomology U5 - J;Article AV - English IS - 0962-1075 UR - ISI:000220522500007 L2 - Anopheles albimanus;saliva;glycoprotein;sex-specific;MOSQUITO AEDES-AEGYPTI; LECTIN-BINDING CHARACTERISTICS; PLASMODIUM-GALLINACEUM; ALPHA-GLUCOSIDASE; FEMALE MOSQUITO; GAMBIAE COMPLEX; PROTEINS; SPOROZOITES; STEPHENSI; INFECTIVITY SO - Insect Molecular Biology 2004 ;13(2):155-164 11730 UI - 6280 AU - Monterrubio-Rico T AU - Enkerlin-Hoeflich E AD - Louisiana State Univ, Sch Renewable Nat Resources, Baton Rouge, LA 70803, USAInst Tecnol & Estudios Super Monterrey, Ctr Calidad Ambiental, Monterrey, NL, MexicoMonterrubio-Rico, T, Univ Michoacana San Nicolas Hidalgo, Fac Biol, Presea Gen Morelos OTE 374,Fraccionamiento Moreli, Morelia 58080, Michoacan, Mexico TI - Present use and characteristics of Thick-billed Parrot nest sites in northwestern Mexico AB - Thick-billed Parrot (Rhynchopsitta pachyrhyncha) nest sites were studied during a six-year period (1995-2000) at six nesting areas in the Sierra Madre Occidental in Mexico. Nests were found in 187 snags or live trees of seven species, which averaged 75.2 cm dbh. Most nests were in snags (59%), and only two nests occurred in trees or snags under 40 cm dbh. Most nests occurred in Douglas fir (Pseudotsuga menziesii 32.6%), and Mexican white pine (Pinus ayacahuite, 21.9%). Nest-site characteristics observed in the study were compared with those reported in the literature 20 yrs ago by Lanning and Shiflett (1983), and important differences were found in the percentages of tree species used. Decline of the Thick-billed Parrot seems to be related to large-scale logging over a wider historical breeding range. Commercial timber harvesting appears to affect nest site availability by leaving few snags and pine trees large enough for parrots to nest in MH - Mexico|Michoacan MH - Mexico|Nuevo Leon MH - USA PB - STATESBORO: ASSOC FIELD ORNITHOLOGISTS RP - NOT IN FILE U3 - TC 5 U4 - Ornithology U5 - J;Article AV - English IS - 0273-8570 UR - ISI:000188790800012 L2 - conifer forests;nest site characteristics;northwest Mexico;Thick-billed Parrot;TREES SO - Journal of Field Ornithology 2004 ;75(1):96-103 11731 UI - 5592 AU - Montes-Rodriguez CJ AU - Alavez S AU - Elder JH AU - Haro R AU - Moran J AU - Prospero-Garcia O AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Lab BL 302, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Grp Neurociencias, Mexico City 04510, DF, MexicoScripps Res Inst, Dept Mol Biol, La Jolla, CA, USAMoran, J, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Lab BL 302, Apdo Postal 70-253, Mexico City 04510, DF, Mexico TI - Prolonged waking reduces human immunodeficiency virus glycoprotein 120- or tumor necrosis factor alpha-induced apoptosis in the cerebral cortex of rats AB - The human immunodeficiency virus (HIV) induces neuronal death, presumably by apoptosis. This effect may be triggered by the glycoprotein 120 (HIVgp120) released by HIV when infecting a cell, and mediated by tumor necrosis factor alpha (TNFalpha), a pro-inflammatory cytokine. Both molecules, HIVgp120 and TNFalpha, increase sleep when administered acutely in the brain. On the other hand, sleep deprivation increases the levels of several growth factors. In this context, we challenged rats with HIVgp120 or TNFalpha simultaneously with sleep deprivation. Our results indicate that both HIVgp120 and TNFalpha increase neuronal death in the rat cerebral cortex, but not hippocampus, and that this effect is completely prevented by total deprivation of sleep. These results suggest that acute total deprivation of sleep protects against the HIVgp120 and TNFalpha deleterious effects. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000221141400006 L2 - apoptosis;cytokines;human immunodeficiency virus;neuroprotection;neurotrophic factors;total deprivation of sleep;NERVE GROWTH-FACTOR; TNF-ALPHA; PHYSIOLOGICAL SLEEP; NEURONAL INJURY; PLASMA-LEVELS; GP120; HIV-1; DEPRIVATION; CYTOKINES; RABBITS SO - Neuroscience Letters 2004 ;360(3):133-136 11732 UI - 4280 AU - Montes JL AU - Ortiz JJ AU - Requena I AU - Perusquia R AD - ININ, Dept Sistemas Nucl, Mexico City, DF, MexicoUniv Granada, Dept Ciencias Computac & JA ETSII, Granada 18071, SpainMontes, JL, ININ, Dept Sistemas Nucl, Carr Mexico Toluca Km 36-5, Mexico City, DF, Mexico TI - Searching for full power control rod patterns in a boiling water reactor using genetic algorithms AB - One of the most important questions related to both safety and economic aspects in a nuclear power reactor operation, is without any doubt its reactivity control. During normal operation of a boiling water reactor, the reactivity control of its core is strongly determined by control rods patterns efficiency. In this paper, GACRP system is proposed based on the concepts of genetic algorithms for full power control rod patterns search. This system was carried out using LVNPP transition cycle characteristics, being applied too to an equilibrium cycle. Several operation scenarios, including core water flow variation throughout the cycle and different target axial power distributions, are considered. Genetic algorithm fitness function includes reactor security parameters, such as MLHGR, MCPR, reactor k(eff) and axial power density. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0306-4549 UR - ISI:000224257800007 L2 - MANAGEMENT OPTIMIZATION PACKAGE; FORMOSA-B; PROGRAM; SYSTEM SO - Annals of Nuclear Energy 2004 ;31(16):1939-1954 11733 UI - 4100 AU - Montes P AU - Bremner TW AU - Kondratova I AD - IPN, CIIDIR, Construct Grp, Unidad Oaxaca, Oaxaca 71230, MexicoUniv New Brunswick, Dept Civil Engn, Fredericton, NB E3B 5A3, CanadaNRC IIT e Business, Fredericton, NB E3B 6C2, CanadaMontes, P, IPN, CIIDIR, Construct Grp, Unidad Oaxaca, Calle Hornos 1003,Sta Cruz Xoxocotlan, Oaxaca 71230, Mexico TI - Eighteen-year performance of epoxy-coated rebar in a tunnel structure subjected to a very aggressive chloride-contaminated environment AB - The increased use of deicing salts during winter is the major cause of corrosion of offshore reinforced concrete structures. Research in the early 1970s suggested that epoxy-coated reinforcing bars might be the solution to this problem. Epoxy-coating reinforcement (ECR) was well received by designers until concern about the effectiveness of the coating arose when bars in several bridges built in Florida in the early 1980s began to corrode after only a few years of service. Me occurrence of this problem resulted in extensive research on the durability of structures built with ECR. This paper describes a corrosion study aimed at gaining a better understanding of the service life of ECR exposed to a chloride-contaminated environment. Corrosion monitoring has been periodically conducted on a roof of a tunnel structure built in 1984 to replace the roof made with uncoated bars that failed after 17 years of service. Me present study summarizes the results of visual inspection and electrochemical testing carried out during the life of the new structure. Results indicate that after 18 years in a very aggressive environment, considering the combined action of chlorides and extreme changes in temperature, the structure is still in good condition and only a few locations show rust staining and cracking, presumably caused by corrosion of the steel reinforcement. Based on the results it would appear that fusion-bonded. epoxy coating subjected to a chloride-laden environment does not provide total protection to the steel reinforcing. However, epoxy coatings have significantly extended the corrosion initiation period as compared to uncoated bars for structures subjected to a chloride environment MH - Canada MH - Mexico|Oaxaca PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000224632200009 L2 - chlorides;cracking deicers;electrochemical testing;epoxy coatings;reinforced concrete;STEEL SO - Corrosion 2004 ;60(10):974-981 11734 UI - 4193 AU - Montiel-Palma V AU - Huitron-Rattinger E AU - Cortes-Llamas S AU - Munoz-Hernandez MA AU - Garcia-Montalvo V AU - Lopez-Honorato E AU - Silvestru C AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Babes Bolyai, Fac Chim Inginerie Chim, R-3400 Cluj Napoca, RomaniaMunoz-Hernandez, MA, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Towards cationic gallium derivatives: Metallacycles from the reactions of organogallium compounds with tetraorganodichalcogenoimidodiphosphinates and a new N-(diphenylthiophosphinyl)thiourento ligand AB - The organometallic complexes of general formulae [Me2Ga{eta(2)-E,E'-((RP)-P-2(E)NP(E')R'(2))}] [R = R' = Ph, E = E' = O (1); R R' = Ph, E = E' = S (2); R = R' = Ph, E = E' = Se (3); R = R' Ph, E = 0, E' = S (4); R = Me, R' = Ph, E = S, E' = 0 (5)] and [Me2Ga{eta(2)-S,S'-[Ph2P(S)NC(S)(C9H10N)]}] (6) were obtained by facile methane elimination reactions from GaMe3 and the acidic ligands (LH)-H-1 [(XPPh2)(2)NH (X = 0, S, Se), (OPPh2)(SPPh2)NH, and (OPMe2)(SPPh2)NH] and (LH)-H-2 [Ph2P(S)NHC(S)(C9H10N)] in toluene. Replacement of one phosphorus atom by a carbon atom in the ligand skeleton of (LH)-H-1 gave the new ligand (LH)-H-2, which, upon reaction with GaMe3, gave compound 6, which shows no significant structural differences with respect to 1-5. Therefore, (LH)-H-2 does not induce partial planarity in the six-membered ring, indicating the necessity for replacing both phosphorus atoms of the ligand by carbon atoms, as in the beta-diketonate-type derivatives, in order to impose ring planarity. Thus, despite originating from a variety of ligands with differing donor atoms and substituents at the phosphorus atoms, all complexes show little structural differences. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Romania PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000224242800019 L2 - cationic catalysts;chelating ligands;gallium;metallacycles;phosphorus;TRANSITION-METAL-FREE; MOLECULAR-STRUCTURES; CRYSTAL-STRUCTURES; COMPLEXES; ALUMINUM; ACIDS; CHEMISTRY; CATALYSTS SO - European Journal of Inorganic Chemistry 2004 ;(18):3743-3750 11735 UI - 4748 AU - Montiel-Palma V AU - Pattison DI AU - Perutz RN AU - Turner C AD - Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoPerutz, RN, Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England TI - Photochemistry of Ru(etp)(CO)H-2 (etp = PhP(CH2CH2PPh2)(2)): Fast oxidative addition and coordination following exclusive dihydrogen loss AB - The photochemistry of Ru(etp)(CO)H-2 (1, etp = PhP(CH2CH2PPh2)(2)) has been studied by UV/vis spectroscopy following nanosecond laser flash photolysis and by NMR and IR spectroscopy following steady-state irradiation. Steady-state irradiation under CO, C2H4, and Et3SiH yields Ru(etp)(CO)(2), Ru(etp)(CO)(C2H4), and Ru(etp)(CO)(SiEt3)H, respectively. Laser flash photolysis (laser wavelength 308 nm) of 1 in cyclohexane generates the 16-electron transient Ru(etp)(CO). In the absence of additional ligands, Ru(etp)(CO) decays by reaction with photoejected dihydrogen, regenerating 1. When flash photolysis was performed in the presence of added ligands, the transient decays by pseudo-first-order kinetics with second-order rate constants on the order of 10(8) dm(3) Mol(-1) s(-1). However, the fastest reaction rate (H-2) is only a factor of ca. 4 greater than the slowest (Et3SiH). Activation parameters for the reaction of 1 with Et3SiH were determined as DeltaG(298)(double dagger) = 25.7 +/- 0.1 kJ mol(-1), DeltaH(double dagger) = 11 +/- 1 kJ mol(-1), and DeltaS(double dagger) = -49 +/- 4 J mol(-1) K-1. The evidence from the UV/vis spectrum of the transient and from the structures of the stable photoproducts indicates that Ru(etp)(CO) adopts a nonplanar geometry MH - United Kingdom MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000223152300007 L2 - LASER FLASH-PHOTOLYSIS; MATRIX-ISOLATION; POLYPHOSPHINE LIGANDS; H ACTIVATION; C-H; COMPLEXES; METAL; TRANSIENT; HYDROGEN; ALKYNES SO - Organometallics 2004 ;23(17):4034-4039 11736 UI - 5689 AU - Montiel O AU - Castillo O AU - Sepulveda R AU - Melin P AD - Tijuana Inst Technol, Dept Comp Sci, Chula Vista, CA 91909, USANatl Polytech Inst, CITEDI, Otay, Tijuana, MexicoMelin, P, Tijuana Inst Technol, Dept Comp Sci, POB 4207, Chula Vista, CA 91909 USA TI - Application of a breeder genetic algorithm for finite impulse filter optimization AB - We describe in this paper the application of a breeder genetic algorithm to the problem of parameter identification for an adaptive finite impulse filter. This algorithm was needed due to the epistiasis phenomena, which is present for this type of adaptive filter. The results of the genetic algorithm were compared to the traditional statistical method and, we found that the breeder genetic algorithm was clearly superior in a multimodal space in most of the cases. However, the statistical least mean squares method is faster than the genetic algorithm. A hybrid method combining the advantages of both methods is proposed for real world applications. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Information Systems U5 - J;Article AV - English IS - 0020-0255 UR - ISI:000220946700004 SO - Information Sciences 2004 ;161(3-4):139-158 11737 UI - 6164 AU - Montorsi F AU - Verheyden B AU - Meuleman E AU - Junemann KP AU - Moncada I AU - Valiquette L AU - Casabe A AU - Pacheco C AU - Denne J AU - Knight J AU - Segal S AU - Watkins VS AD - Univ Vita & Salute San Raffaele, Dept Urol, I-20312 Milan, ItalyUniv Antwerp, Univ Antwerp Hosp, Dept Urol, Edegem, BelgiumUniv Nijmegen Hosp, Dept Urol, NL-6500 HB Nijmegen, NetherlandsUniv Kiel, Dept Urol, D-24098 Kiel, GermanyUniv Madrid, Hosp Gen Gregorio Maranon, Dept Urol, Madrid 3, SpainCHU Montreal, Dept Urol, Montreal, PQ, CanadaInst Med Especializado, Buenos Aires, DF, ArgentinaClin Londres, Mexico City, DF, MexicoEli Lilly & Co, Indianapolis, IN 46285, USALilly ICOS LLC, Bothell, WA, USAMontorsi, F, Univ Vita & Salute San Raffaele, Dept Urol, Via Olgettina 60, I-20312 Milan, Italy TI - Long-term safety and tolerability of thdalafil in the treatment of erectile dysfunction AB - Objective: To assess the long-term safety and tolerability of tadalafil for patients with erectile dysfunction (ED). Patients and Methods: This was a multicentre, open-label, 24-month extension trial involving 1173 men with ED. The mean age was 57 (range 23-83) years and 74.8% of patients were taking concomitant medications for comorbid conditions, including diabetes mellitus in 30.5% of men and hypertension in 29.5%. These patients had participated in 1 of 5 previous 8-week or 12-week randomised, double-blind, placebo-controlled tadalafil studies. In the present trial, the starting 10 mg dose of tadalafil could be increased to 20 mg if the patient could not achieve satisfactory intercourse or reduced to 5 mg for an adverse event that was persistent, intolerable and judged by the investigator to be related to tadalafil. Results: Four hundred ninety-three (42.0%) men completed 24 months of treatment. In addition, a further 234 (19.9%) completed 18 months of treatment due to a sponsor decision to reduce the study duration. The total tadalafil exposure was 1676.0 patient-years. Tadalafil was safe and well tolerated. Headache (15.8%), dyspepsia (11.8%), nasopharyngitis (11.4%), and back pain (8.2%) were the most common treatment-emergent adverse events. The rate of discontinuations due to adverse events for this 18-24-month study was 6.3% and the rate for any individual event was <1%. Serious adverse events occurred in 8.6% of patients. No consistent pattern of serious adverse events assessed as causally associated with tadalafil administration was observed. None of the four deaths that occurred during the study was assessed as tadalafil related. There were no clinically significant laboratory or electrocardiographic findings or changes in vital signs in mean baseline-to-endpoint analysis attributable to tadalafil. Tadalafil administration was not causally associated with drug-induced hepatotoxicity, neutropenia, thrombocytopenia, or renal dysfunction. Conclusion: Tadalafil at doses of 5, 10, or 20 mg taken as needed up to once daily for 18 to 24 months was safe and well tolerated. These findings support the long-term use of tadalafil in the clinical management of erectile dysfunction. (C) 2003 Elsevier B.V. All rights reserved MH - Argentina MH - Belgium MH - Canada MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 33 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0302-2838 UR - ISI:000189226400013 L2 - drug therapy;impotence;phosphodiesterase inhibitors;safety;tolerability;SILDENAFIL; EFFICACY; IMPOTENCE; INHIBITOR; TADALAFIL; DISEASE; TRIAL; MEN SO - European Urology 2004 ;45(3):339-345 11738 UI - 5707 AU - Monzon-Hernandez D AU - Mora J AU - Perez-Millan P AU - Diez A AU - Cruz JL AU - Andres MV AD - Ctr Invest Opt Asociac Civil, Leon Guanajuato 37150, MexicoUniv Valencia, Dept Fis Aplicada & Electromagnetismo, Inst Ciencia Mat, E-46100 Burjassot, SpainMonzon-Hernandez, D, Ctr Invest Opt Asociac Civil, Loma Bosque 115, Leon Guanajuato 37150, Mexico TI - Temperature sensor based on the power reflected by a Bragg grating in a tapered fiber AB - We present a temperature sensor based on two chirped gratings made in optical fibers tapered by fusion. One of the gratings has a metallic shielding and acts as sensor element, whereas the second grating provides a reference signal. The sensor is interrogated by measuring the power reflected by the two gratings, and the system has an accuracy of 0.05 degreesC over a linear operation range of more than 10 degreesC that can be adjusted in the fabrication process. (C) 2004 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000220882700001 L2 - STRAIN-SENSOR; SYSTEM; FILTER SO - Applied Optics 2004 ;43(12):2393-2396 11739 UI - 4489 AU - Moon PA AU - Litz RE AU - Chavez VM AD - Univ Florida, Ctr Trop Res & Educ, Homestead, FL 33031, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoMoon, PA, Univ Florida, Ctr Trop Res & Educ, Homestead, FL 33031, USA TI - Effect of gelling agent on growth and development of Ceratozamia hildae somatic embryos AB - Individual somatic proembryos of Ceratozamia hildae were exposed to media that differed only in gelling agent utilized. Five different gelling agents were compared in the first experiment: Bacto agar, Agargel, Gel-Gro, Phytagar, and TC agar. In addition, the effect of agar was examined at two levels. Growth, proliferation, and development were assessed. The lower level of agar did not support good somatic proembryo growth. Agargel and the high agar concentration produced cultures with good proliferation. Proembryos exposed to Phytagar, Gel-Gro, and TC agar had the highest proliferation rates. Overall, Gel-Gro was considered the best gelling agent tested. The three concentrations of Gel-Gro used in the second experiment were 2, 4, and 6 g(.)l(-1), with the lowest concentration representing the control, the recommended concentration. As gelling agent concentration increased, so did mortality; however, the highest Gel-Gro concentration also produced the highest numbers of good-quality, mature somatic embryos. Proliferation rate was greatest at the lowest concentration. These results suggest that Ceratozamia cultures should be exposed to different gelling agents or concentrations of gelling agents at different developmental stages in order to produce the greatest number and highest quality of somatic embryos MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0006-8101 UR - ISI:000223771500006 L2 - CULTURES; GYMNOSPERMAE; TREES SO - Botanical Review 2004 ;70(1):47-53 11740 UI - 6123 AU - Moore JT AU - Hrusak M AU - Dzamonja M AD - Boise State Univ, Dept Math, Boise, ID 83725, USAUniv Nacl Autonoma Mexico, Inst Math, Morelia 58089, Michoacan, MexicoUniv E Anglia, Sch Math, Norwich NR4 7TJ, Norfolk, EnglandMoore, JT, Boise State Univ, Dept Math, Boise, ID 83725, USA TI - Parametrized lozenge principles AB - We will present a collection of guessing principles which have a similar relationship to lozenge as cardinal invariants of the continuum have to CH. The purpose is to provide a means for systematically analyzing lozenge and its consequences. It also provides for a unified approach for understanding the status of a number of consequences of CH and lozenge in models such as those of Laver, Miller, and Sacks MH - United Kingdom MH - Mexico|Michoacan MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Mathematics U5 - J;Article AV - English IS - 0002-9947 UR - ISI:000189299000007 L2 - diamond;weak diamond;cardinal invariant;guessing principle;SPACES SO - Transactions of the American Mathematical Society 2004 ;356(6):2281-2306 11741 UI - 4543 AU - Moraes SM AU - Romero-Fuster MC AU - Sanchez-Bringas F AD - Univ Fed Vicosa, Dept Matemat, BR-36570000 Vicosa, MG, BrazilUniv Valencia, Dept Geometria & Topol, E-46100 Valencia, SpainUniv Nacl Autonoma Mexico, Fac Ciencias, Dept Matemat, Mexico City 04510, DF, MexicoMoraes, SM, Univ Fed Vicosa, Dept Matemat, BR-36570000 Vicosa, MG, Brazil TI - Principal configurations and umbilicity of submanifolds in R-N AB - We consider the principal configurations associated to smooth vector fields nu normal to a manifold M immersed into a euclidean space and give conditions on the number of principal directions shared by a set of k normal vector fields in order to guaranty the umbilicity of M with respect to some normal field nu. Provided that the unibilic curvature is constant, this will imply that ill is hyperspherical. We deduce some results concerning binormal fields and asymptotic directions for manifolds of codimension 2. Moreover, in the case of a surface M in R-N, we conclude that if N > 4; it is always possible to find some normal field with respect to which M is umbilic and provide a geometrical characterization of such fields MH - Brazil MH - Mexico|Distrito Federal MH - Spain PB - BRUSSELS: BELGIAN MATHEMATICAL SOC TRIOMPHE RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 1370-1444 UR - ISI:000223706600006 L2 - SURFACES; CONTACT; LINES SO - Bulletin of the Belgian Mathematical Society-Simon Stevin 2004 ;11(2):227-245 11742 UI - 6387 AU - Morales-Gonzales JM AU - ito-Leon J AU - Rivera-Navarro J AU - Mitchell AJ AD - Minist Labour & Social Affairs, Dept Res, Madrid, SpainMostoles Gen Hosp, Dept Neurol, Madrid, SpainUniv Veracruzana, Fac Social Work, Jalapa, Veracruz, MexicoLeicester Gen Hosp, Brandon Mental Hlth Unit, Dept Liaison Psychiat, Leicester LE5 4PW, Leics, EnglandBenito-Leon, J, Avda Constituc 73,Portal 3,7 Izquierda, E-28820 Madrid, Spain TI - A systematic approach to analyse health-related quality of life in multiple sclerosis: the GEDMA study AB - Objective: To describe a holistic and comprehensive approach to the assessment of sufferer's perceptions of health-related quality of life (HRQoL) in a cohort of multiple sclerosis (MS) patients. Methods: The GEDMA (Grupo de Enfermedades Desmielinizantes de Madrid, in Spanish) study is an ongoing longitudinal survey using quantitative and qualitative methodologies. The baseline cohort consisted of a large sample of MS patients recruited from 13 hospitals in Madrid, Spain. Using a standardized protocol we collected data concerning the sociodemographic and health status characteristics of patients, as well as implementing a modified Spanish version of the Functional Assessment of Multiple Sclerosis quality of life instrument. Primary caregivers were interviewed using a specific protocol combined with the Zarit Burden Interview. Results: The index cohort comprised 371 MS patients (68.7% female) of mean age 38.9 +/- 0.9 years. Age, sex and clinical form distribution were similar to other MS population-based surveys. There were 258 (69.5%) relapsing-remitting (RR) MS patients and 10 (30.5%) progressive MS patients. More than one-third of the married patients with progressive MS and almost a quarter of the RRMS patients separated or divorced following a diagnosis of MS; 71.3% of the progressive MS patients as well as 65.8% of the RRMS patients were unemployed as a consequence of the disease. Qualitative analysis showed that friendship and family relationships and occupational status were the most significant dimensions influenced by MS. On the other hand, the speech analysis of primary caregivers showed that emotional burden was related to patients' physical disability. Furthermore, primary caregivers described the influence of MS on their own occupational status, their nonacceptance of the disease, a perception of a lack of support by other members of the family as well as a 'selfish and intransigent' attitude of the patients themselves. Conclusions: The analysis of the GEDMA cohort provides valuable information that helps clarify the impact of MS on patients' HRQoL MH - United Kingdom MH - Mexico|Veracruz MH - Spain PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 8 U4 - Clinical Neurology U5 - J;Article AV - English IS - 1352-4585 UR - ISI:000188239500008 L2 - health-related quality of life;multiple sclerosis;prospective study;qualitative methodology;quantitative survey;SECONDARY PROGRESSIVE MS; CLOCK DRAWING TEST; SPAIN; DISABILITY; DISEASE; IMPACT; IMPAIRMENT; DEPRESSION; DISTRICT; FATIGUE SO - Multiple Sclerosis 2004 ;10(1):47-54 11743 UI - 3874 AU - Morales-Gonzalez JM AU - Rivera-Navarro J AU - ito-Leon J AU - Mitchell AJ AD - Minist Labour & Social Affairs, Res Dept, Madrid, SpainTamaulipas Autonomous Univ, Acad Multidisciplinary Unit Sci Humanities & Educ, Tamaulipas Univ Ctr, Ciudad Victoria, Tamaulipas, MexicoMostoles Gen Hosp, Dept Neurol, Madrid, SpainLeicester Gen Hosp, Dept Liaison Psychiat, Leicester, Leics, EnglandMadrid Demyelinating Dis Grp, GEDMA, Madrid, SpainMorales-Gonzalez, JM, Minist Labour & Social Affairs, Res Dept, Madrid, Spain TI - Measuring divorce and unemployment in the GEDMA study MH - United Kingdom MH - Mexico|Tamaulipas MH - Spain PB - LONDON: ARNOLD, HODDER HEADLINE PLC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Letter AV - English IS - 1352-4585 UR - ISI:000225101700023 L2 - QUALITY-OF-LIFE; MULTIPLE-SCLEROSIS SO - Multiple Sclerosis 2004 ;10(6): 11744 UI - 5420 AU - Morales-Menendez R AU - Ramirez-Mendoza R AU - Mutch J AU - Guedea-Elizalde F AD - Ctr Ind Automat, Monterrey NL, Mexico. Univ British Columbia, Dept Comp Sci, Vancouver, BC V5Z 1M9, Canada. Univ Waterloo, Waterloo, ON N2L 3G1, Canada TI - Toward a new approach for online fault diagnosis combining particle filtering and parametric identification AB - This paper proposes a new approach for online fault diagnosis in dynamic systems, combining a Particle Filtering (PF) algorithm with a classic Fault Detection and Isolation (FDI) framework. Of the two methods, FDI provides deeper insight into a process; however, it cannot normally be computed online. Our approach uses a preliminary PF step to reduce the potential solution space, resulting in an online algorithm with the advantages of both methods. The PF step computes a posterior probability density to diagnose the most probable fault. If the desired confidence is not obtained, the classic FDI framework is invoked. The FDI framework uses recursive parametric estimation for the residual generation block and hypothesis testing and Statistical Process Control (SPC) criteria for the decision making block. We tested the individual methods with an industrial dryer MH - Canada MH - Mexico|Nuevo Leon T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - ON REQUEST (04/14/08) U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlermm@itesm.mx ricardo.ramirez@itesm.mx mutch@cs.ubc.ca fguedea@pami.uwaterloo.ca0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600057 SO - 2004 ;():555-564 11745 UI - 5119 AU - Morales-Montor J AU - Mohamed F AU - Drake L AU - Baghdadi A AU - Baig S AU - Damian RT AD - Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, MexicoUniv Georgia, Dept Cellular Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30602, USAMorales-Montor, J, Natl Autonomous Univ Mexico, Inst Invest Biomed, Dept Inmunol, AP 70228, Mexico City 04510, DF, Mexico TI - Dynamics of the cytokine messenger RNA expression pattern in the liver of baboons infected with Schistosoma mansoni AB - Periovular granulomas are the major lesions in baboons infected with Schistosoma mansoni. Temporal Northern blot analysis of cytokine messenger RNA (mRNA) expression in granulomatous baboon livers demonstrated tissue-specific expression. Interleukin 1 beta (IL-1beta), IL-6, tumor necrosis factor alpha, and migration inhibitory factor (MIF) mRNAs were expressed strongly at week 6 of infection and decayed thereafter, whereas interferon gamma (IFN-gamma), IL-2, IL-10, and IL-12 mRNAs were first expressed at week 12, with IFN-gamma and IL-12 mRNA expression persisting until week 17. IL-4 and IL-5 mRNAs first appeared at week 12, with IL-4 persisting unchanged and IL-5 increasing by week 17. Thus, egg deposition induced strong hepatic expression of proinflammatory and downregulatory cytokines. The cooccurrence of IL-2, IFN-gamma, 11-4, and IL-5 mRNAs at week 12 confirms that baboons, like humans, show a mixed type 1-type 2 cytokine response. When granulomas had become smaller at 17 wk, IFN-gamma, IL-4, and IL-5 were the only cytokine mRNAs that were expressed strongly, implicating them in granuloma modulation. The early expression of MIF mRNA and MIF's role as the main counterregulator of glucocorticoid immunosuppression ties in with our earlier demonstrations of circulating adrenal steroids changing with the progression of schistosomiasis in baboons and of proinflammatory cytokine mRNA expression in the hypothalamic-pituitary-adrenal axis tissues of infected baboons. Together, these data imply neuroendocrinological influences on disease progression in schistosomiasis MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000222292200017 L2 - MIGRATION INHIBITORY FACTOR; HYPERSENSITIVITY GRANULOMA-FORMATION; NECROSIS-FACTOR-ALPHA; TNF-ALPHA; CHALLENGE INFECTION; PERIPORTAL FIBROSIS; PAPIO-CYNOCEPHALUS; IMMUNE-RESPONSE; EGG GRANULOMAS; IFN-GAMMA SO - Journal of Parasitology 2004 ;90(3):547-556 11746 UI - 5506 AU - Morales-Montor J AU - Mohamed F AU - Damian RT AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoTexas A&M Univ, Texas Vet Med Ctr, Dept Vet Pathobiol, College Stn, TX 77843, USAUniv Georgia, Dept Cellular Biol, Athens, GA 30602, USAUniv Georgia, Ctr Trop & Emerging Global Dis, Athens, GA 30602, USAMorales-Montor, J, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Immunol, AP 70228, Mexico City 04510, DF, Mexico TI - Schistosoma mansoni: the effect of adrenalectomy on the murine model AB - Adrenal steroid hormones have been implicated, among others, as one of the most important host factors controlling the onset, establishment, and pathogenesis of schistosomiasis. They appear to inhibit oviposition by Schistosoma mansoni both in vitro and in vivo, and their effect is greatly enhanced when administered in combination with a schistosomicidal drug. Therefore, we hypothesized that adrenalectomy would greatly affect the course of the murine schistosomiasis infection. To test this hypothesis, adrenalectomized mice (Adx) infected with S. mansoni were compared with intact infected and sham-infected controls concerning their mortality rate, numbers of male and female worms, number of eggs, and liver pathology. Compared with controls, Adx infected mice showed an increase of 50% in the mortality rate, as well as 1.7-3 times as many adult worms and twice as many ova per worm pair in their liver. Thus, for the first time, there is evidence that lack of adrenal steroids mediate an increment of the adult worm burden and promote worm fecundity in vivo. The present work was done to test the hypothesis that lack of adrenal steroids enhances adult worm attrition, possibly by their direct effect on the parasite, and by upregulating or downregulating innate and adaptive immune responses. (C) 2004 Elsevier SAS. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Immunology;Microbiology;Virology U5 - J;Article AV - English IS - 1286-4579 UR - ISI:000221494200008 L2 - Schistosomiasis;adrenalectomy;Schistosoma mansoni;adrenal steroids;susceptibility;TUMOR-NECROSIS-FACTOR; MIGRATION INHIBITORY FACTOR; PAPIO-CYNOCEPHALUS; MESSENGER-RNA; FACTOR-ALPHA; INFECTION; MICE; EXPRESSION; SUSCEPTIBILITY; GRANULOMA SO - Microbes and Infection 2004 ;6(5):475-480 11747 UI - 4769 AU - Morales-Morales D AU - Redon R AU - Yung C AU - Jensen CM AD - Univ Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoUniv Nacl Autonoma Mexico, CCADET, Coyoacan 04510, DF, MexicoUniv Hawaii Manoa, Dept Chem, Honolulu, HI 96822, USAMorales-Morales, D, Univ Nacl Autonoma Mexico, Inst Quim, Cd Univ,Circuito Exterior, Coyoacan 04510, DF, Mexico TI - Dehydrogenation of alkanes catalyzed by an iridium phosphinito PCP pincer complex AB - The novel phosphinito iridium PCP pincer complex, IrH4{C6H3-2,6-(OPPr2')(2)} can be conveniently synthesized and isolated in 74% overall yield. The complex catalyzes the dehydrogenation of linear alkanes to alkenes at the rate of 13 turnovers min(-1) at 200 degreesC. This catalytic activity is slightly higher than that exhibited by iridium complexes of analogous bis(phosphino) PCP ligands. The bis(phosphinito) complex is resistant to decomposition for periods up to 7 days at temperatures as high as 200 degreesC thus matching the thermal stability of the bis(phosphino) pincer complexes. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1693 UR - ISI:000223116900019 L2 - catalytic alkane dehydrogenation;PCP pincer ligand;PCP pincer Ir complex;phosphinito ligand;iridium hydride;catalysis;C-H-BONDS; SATURATED-HYDROCARBONS; DIHYDROGEN ATMOSPHERE; ACTIVATION; FUNCTIONALIZATION; EFFICIENT; RHODIUM; SELECTIVITY; IRRADIATION; PHOTOLYSIS SO - Inorganica Chimica Acta 2004 ;357(10):2953-2956 11748 UI - 4978 AU - Morales-Saavedra OG AU - Bulat M AU - Rauch S AU - Heppke G AD - Tech Univ Berlin, Opt Inst Sekr, D-10623 Berlin, GermanyUNAM, CCADET, Lab Fotofis, Mexico City 04510, DF, MexicoTech Univ Berlin, Stranski Lab Sekr, D-10623 Berlin, GermanyMorales-Saavedra, OG, Tech Univ Berlin, Opt Inst Sekr, P1-1 ER11,Str 17 Juni 135, D-10623 Berlin, Germany TI - Domain structure studies in phases of bent-shaped molecules by spatially resolved second harmonic microscopy AB - Several banana-shaped liquid crystalline molecules have been studied as active media for second harmonic generation (SHG) in their different thermotropic phases [1]. Besides the B-2- and B-7-phases, which exhibit SHG under external applied electric fields, the so-called "blue" B-4-phase exhibits spontaneous SHG without application of any external field [2,3]. Both phases form a complex poly-domain structure which lead us to develop a SHG-Scanning microscope to perform a more detailed study of this complex systems. First experimental 2D-SHG-Scans in this molecules show the possibility to discriminate domains of different polar and NLO-properties, allowing a better understanding and analyses of this structures. A well defined polar structuring by external fields and analyses thereof is a prerequisite for the development of non-linear-optical (NLO)-applications of banana-shaped molecules like quasi-phase-matched (QPM)-waveguiding structures [4,5] or fast NLO. switches MH - Germany MH - Mexico|Distrito Federal PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Crystallography U5 - J;Article AV - English IS - 1058-725X UR - ISI:000222524700063 L2 - bent shaped liquid crystalline molecules;domain and molecular orientation;nonlinear microscopy;second harmonic generation (SHG);SMECTIC LIQUID-CRYSTALS; ACHIRAL MOLECULES; GENERATION; BIS<4-(4-ALKOXYPHENYLIMINOMETHYL)BENZOATES>; BEHAVIOR; FIELD; ORDER SO - Molecular Crystals and Liquid Crystals 2004 ;413():2743-2752 11749 UI - 4633 AU - Morales-Sanchez E AU - Laine B AU - Prokhorov E AU - Trapaga G AU - Gonzalez-Hernandez J AD - IPN, CINVESTAV, Unidad Queretaro, Queretaro 76230, Qro, MexicoINSA, Villeurbanne, FranceProkhorov, E, IPN, CINVESTAV, Unidad Queretaro, Fracc Real Juriquilla, Queretaro 76230, Qro, Mexico TI - Crystallization kinetics of Ge-Sb-Te alloys with metastable phase formation AB - The purpose of this work is to investigate the microstructural transformations during the isothermal amorphous-to-crystalline phase transition process in alloys with compositions around the pseudobinary GeTe-Sb2Te3 line using electrical impedance, optical transmission, and X-ray diffraction measurements. Experimental measurements indicate that the process of isothermal crystallization in GeTe, Ge2Sb2Te5, and Ge1Sb2Te4 takes place in two stages: in the first stage, nuclei of a metastable phase precede the formation of stable phases; in the second stage, the nuclei transform into their corresponding equilibrium fcc stoichiometric structures. The kinetics of this crystallization processes were analyzed through results from impedance measurements, in which Bruggerman's effective medium approximation was employed, considering that the amorphous matrix contained inclusions of two different phases. Furthermore, a theoretical stochastic model of crystallization was developed based on a two-stage process representing the growth of an fcc stoichiometric phase from a metastable crystalline phase. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Queretaro PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000223329700144 L2 - phase transition;metastable phase;transmittance;impedance;X-ray diffraction;THIN-FILMS; TRANSITION; GLASS SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;375-77():763-766 11750 UI - 2997 AU - Morales RE AU - Wu K AU - Forero JH AU - Ramos X AU - Hunsche E AD - Ctr Nacl Rehabil, Mexico City, DF, MexicoSt Johns Univ, Jamaica, NY 11439, USAClin Cirugia Ortoped, Bogota, ColombiaUniv San Francisco Quito, Quito, Ecuador TI - Evaluation of rofecoxib in a multi-national, observational study in clinical practice in Latin-America MH - Colombia MH - Ecuador MH - Mexico|Distrito Federal MH - USA PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551501747 SO - Annals of the Rheumatic Diseases 2004 ;63():514-514 11751 UI - 4635 AU - Moran-Zenteno DJ AU - ba-Aldave LA AU - Sole J AU - Iriondo A AD - Natl Autonomous Univ Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USAMoran-Zenteno, DJ, Natl Autonomous Univ Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A major resurgent caldera in southern Mexico: the source of the late Eocene Tilzapotla ignimbrite AB - The Tilzapotla caldera constitutes the first discovery of a major Tertiary collapse volcanic structure south of the Mexican Volcanic Belt. Although it is spatially associated with silicic ignimbrites in a region relatively distant from the extensive ignimbritic province of the Sierra Madre Occidental (SMO), it is among the largest collapse calderas documented in Mexico. The caldera is defined by a 33 x 24 kin semi-elliptical structure that encircles the largest exposures of the Tilzapotla ignimbrite and corresponds to the structural margin rather than the topographic rim. A central uplifted block limited by NW-trending faults is the main indication of a resurgent stage. The caldera structural margin is surrounded by extensive exposures of Cretaceous marine sequences that structurally define a broad elliptical dome (45 x 35 kin) originated in the first stage of the caldera evolution. There is evidence showing that the 34 Ma Tilzapotla ignimbrite represents the climatic event of the caldera collapse. It is constituted by a massive sequence of crystal vitric tuff with conspicuous euhedral biotite and abundant quartz. The intra-caldera facies is intercalated with mega- and meso-breccias of limestone and anhydrite fragments derived from the slumping of the caldera wall during the caldera collapse. The overlying sequence includes post-collapse ignimbrites as well as amphibole and pyroxene bearing dacitic to andesitic lava flows. The age (33 to 32 Ma) and isotopic signatures of these lava flows indicate a resurgent event related with the input of more primitive magmas into the magma chamber. The rectilinear northeastern and southwestern segments of the structural margin of the caldera correspond to NW-trending tectonic lineaments that are part of a regional strike-slip system, active at the time of the caldera formation. We interpret that the NW tectonic structures defined zones of weakness that accommodated the caldera collapse in the northeastern and southwestern segments of the caldera structural margin. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000223414600005 L2 - collapse caldera;resurgent caldera;strike-slip tectonics;ignimbrite;inega-breccia;Mexico;ASH-FLOW CALDERAS; TECTONIC MODEL; GUERRERO STATE; GEOCHRONOLOGY; EXTENSION; BASIN; RANGE; VOLCANISM; MAGMATISM; EVOLUTION SO - Journal of Volcanology and Geothermal Research 2004 ;136(1-2):97-119 11752 UI - 3415 AU - Moreno-Altamirano MMB AU - Romano M AU - Legorreta-Herrera M AU - Sanchez-Garcia FJ AD - Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Inmunol, Mexico City 11340, DF, MexicoNatl Inst Med Res, London NW7 1AA, EnglandUniv Nacl Autonoma Mexico, FES Zaragoza, Mexico City 04510, DF, MexicoMoreno-Altamirano, MMB, Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Inmunol, Mexico City 11340, DF, Mexico TI - Gene expression in human macrophages infected with dengue virus serotype-2 AB - Infection by any of the four serotypes of dengue viruses (DEN-1, -2, -3 and -4) may result in either a relatively benign fever, called dengue fever (DF), a fatal disease, such as dengue haemorrhagic fever (DHF) or dengue shock syndrome (DSS). Several lines of evidence suggest that soluble immune response mediators may be involved in the severity of dengue infections. For instance, elevated seric levels of IL-8 are a common feature in DHF patients. Because other chemokines, cytokines, adhesion molecules, chemokine and cytokine receptors, as well as cytokine-related molecules may also be involved in dengue virus pathogenesis, we aimed at analysing the gene expression of such molecules in the course of an in vitro DEN-2 infection of human peripheral blood monocyte-derived macrophages, a cell type regarded as a primary target for DEN. Nylon membrane gene arrays containing 375 different human cytokine-related genes were used as a first step to search for differentially expressed genes upon infection. Transcripts for IL-8, IL-1beta, osteopontin, GRO-alpha, -beta and -gamma, I-309, and some other molecules showed to be upregulated upon infection, whereas others such as MIC-1, CD27L and CD30L, were downregulated. Four genes were selected for reverse transcriptase-polymerase chain reaction based gene-expression analysis as a way to partially confirm microarray results. This approach pointed out 25 macrophage-expressed cytokine-related genes that could be relevant in DEN-2 pathogenesis MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Immunology U5 - J;Article AV - English IS - 0300-9475 UR - ISI:000226256800011 L2 - HEMORRHAGIC-FEVER; CHEMOKINE PRODUCTION; CYTOKINE PRODUCTION; ENDOTHELIAL-CELLS; CD30 HOMOLOG; SERUM LEVELS; ACTIVATION; OSTEOPONTIN; CHILDREN; RECEPTOR SO - Scandinavian Journal of Immunology 2004 ;60(6):631-638 11753 UI - 6125 AU - Moreno-Armenta MG AU - Martinez-Ruiz A AU - Takeuchi N AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoUNAM, CCMC, San Ysidro, CA 92143, USAUniv Autonoma Baja California, Fac Ciencias, Ensenada 22800, Baja California, MexicoMoreno-Armenta, MG, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada, Baja California, Mexico TI - Ab initio total energy calculations of copper nitride: the effect of lattice parameters and Cu content in the electronic properties AB - We have studied the structural and electronic properties of bulk copper nitride by performing first principles total energy calculations using the full-potential linearized augmented plane wave (FP-LAPW) method. In our study we have considered two types of cells: the ideal cubic anti-ReO3 structure corresponding to Cu3N, and a unit cell with an extra Cu atom at the center of the cube. In the first case, our calculated lattice parameter a = 3.82 Angstrom is in excellent agreement with the experimental value a = 3.807 Angstrom. The structure is semiconductor with a small indirect band-gap. The increasing of the lattice parameter results in larger band-gaps. An addition of an extra Cu atom at the center of the cell results in a slightly larger lattice parameter a = 3.88 Angstrom, and the structure becomes fully metallic. Our calculated value is similar to the experimental lattice parameter corresponding to a metallic copper nitride film. (C) 2003 Elsevier SAS. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 24 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 1293-2558 UR - ISI:000189193400001 L2 - nitrides;copper;transition metal nitrides;ab initio;semiconductor;THIN-FILMS; RECORDING MEDIA; TIN SO - Solid State Sciences 2004 ;6(1):9-14 11754 UI - 3721 AU - Moreno-Daniel A AU - Juang BH AU - Nolazco-Flores JA AD - Georgia Inst Technol, Ctr Signal & Image Proc, Atlanta, GA 30332, USA. Inst Tecnol & Estudios Super Monterrey, Dept Ciencias Computacionales, Monterrey, NL, Mexico TI - Speaker verification using coded speech AB - The implementation of a pseudo text-independent Speaker Verification system is described. This system was designed to use only information extracted directly from the coded parameters embedded in the ITU-T G.729 bit-stream. Experiments were performed over the YOHO database [1]. The feature vector as a short-time representation of speech consists of 16 LPC-Cepstral coefficients, as well as residual information appended in the form of a pitch estimate and a measure of vocality of the speech. The robustness in verification accuracy is also studied. The results show that while speech coders, G.729 in particular, introduce coding distortions that lead to verification performance degradation, proper augmented use of unconventional information nevertheless leads to a competitive performance on par with that of a well-studied traditional system which does not involve signal coding and transmission. The result suggests that speaker verification over a cell phone connection remains feasible even though the signal has been encoded to 8 Kb/s MH - Mexico|Nuevo Leon MH - USA T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleantonio@ece.gatech.edu juang@ece.gatech.edu jnolazco@itesm.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBE01 AV - English IS - 0302-9743 UR - ISI:000225085900045 SO - 2004 ;():366-373 11755 UI - 6224 AU - Moreno-Garcia ME AU - Partida-Sanchez S AU - Primack J AU - Sumoza-Toledo A AU - Muller-Steffner H AU - Schuber F AU - Oppenheimer N AU - Lund FE AU - Santos-Argumedo L AD - CINVESTAV IPN, Dept Biomed Mol, Mexico City 07360, DF, MexicoCINVESTAV IPN, Dept Biol Celular, Mexico City 07360, DF, MexicoTrudeau Inst Inc, Saranac Lake, NY 12983, USACNRS ULP, UMR 7514, Chim Bioorgan Lab, Strasbourg, FranceUniv Calif San Francisco, Dept Pharmaceut Chem, San Francisco, CA 94143, USASantos-Argumedo, L, CINVESTAV IPN, Dept Biomed Mol, Av IPN 2508 Col Zacatenco, Mexico City 07360, DF, Mexico TI - CD38 is expressed as noncovalently associated homodimers on the surface of murine B lymphocytes AB - CD38 is a transmembrane glycoprotein that functions as an ectoenzyme and as a receptor. Based on the structural similarity between CD38 and ADP-ribosyl cyclase from Aplysia californica, it was hypothesized that CD38 is expressed as a homodimer on the surface of cells. Indeed, CD38 dimers have been reported, however, the structural requirements for their stabilization on the plasma membrane are unknown. We demonstrate that the majority of CD38 is assembled as noncovalently associated homodimers on the surface of B cells. Analysis of CD38 mutants, expressed in Ba/F3 cells, revealed that truncation of the cytoplasmic region or mutation of a single amino acid within the alpha1-helix of CD38 decreased the stability of the CD38 homodimers when solubilized in detergent. Cells expressing the unstable CD38 homodimers had diminished expression of CD38 on the plasma membrane and the half-lives of these CD38 mutant proteins on the plasma membrane were significantly reduced. Together, these results show that CD38 is expressed as noncovalently associated homodimers on the surface of murine B cells and suggest that appropriate assembly of CD38 homodimers may play an important role in stabilizing CD38 on the plasma membrane of B cells MH - France MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000189052600014 L2 - B lymphocytes;CD38;homodimer stability;NAD(+) glycohydrolase;protein structure;ADP-RIBOSYL CYCLASE; TRANSMEMBRANE GLYCOPROTEIN CD38; CALCIUM-MOBILIZING METABOLITE; CD38/ADP-RIBOSYL CYCLASE; CELL ACTIVATION; PROTEIN; DOMAIN; ENZYME; PURIFICATION; DIMERIZATION SO - European Journal of Biochemistry 2004 ;271(5):1025-1034 11756 UI - 4480 AU - Moreno-Gonzalez J AU - Crossa J AU - Cornelius PL AD - CIAM, La Coruna, SpainCIMMYT, Mexico City 06600, DF, MexicoUniv Kentucky, Lexington, KY 40546, USAMoreno-Gonzalez, J, CIAM, Apartado 10, La Coruna, Spain TI - Genotype x Environment Interaction in multi-environment trials using shrinkage factors for ammi models AB - Shrinkage factors applied to the additive main effects and multiplicative interaction (AMMI) models improve prediction of cultivar responses in multi-environment trials ( MET). Estimates of shrinkage factors based on the eigenvalue partition (EVP) method may get a further improvement in the predictions of cell means. Objectives of this work were: ( 1) to compare the EVP-based shrinkage method with unshrunken AMMI, best linear unbiased predictor (BLUP) and other shrunken method ( herein named CCC), when they were applied to five maize MET and simulation data; ( 2) to assess by cross validation the equation which estimates the standard error of predicted means (SEPM) based on the EVP theory; ( 3) to estimate the genotype x environment interaction (GEI) variance components after applying the EVP shrinkage method to the five maize MET. Empirical data of five maize MET and simulation data were used for cross validation of the methods using the root mean square predictive difference (RMSPD) criterion. The RMSPD of the shrunken EVP predicted cell means was generally smaller than those of the other methods, suggesting that the EVP method was generally better predictor than the other methods. The truncated AMMI was the worst among the four methods studied. The EVP-based equation, which predicts the SEPM, was a good predictor as determined by the RMSPD cross validation criterion, with the advantage that it does not need one replication for validation. Estimates of mean squares, and GEI and error variances associated with the GEI effects were smaller for the shrunken EVP predicted effects than for the original data MH - Mexico|Distrito Federal MH - Spain MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000223738600012 L2 - AMMI;BLUP;genotype x environment interaction;shrinkage factors;cultivar prediction;EVP model;MULTIPLICATIVE INTERACTION-MODEL; PREDICTING CELL MEANS; CULTIVAR TRIALS; YIELD TRIALS; SELECTION; SUCCESS SO - Euphytica 2004 ;137(1):119-127 11757 UI - 6644 AU - Moreno-Mendoza N AU - Torres-Maldonado L AU - Chimal-Monroy J AU - Harley V AU - Merchant-Larios H AD - UNAM, Inst Invest Biomed, Dept Cell Biol & Physiol, Mexico City 04510, DF, MexicoPrince Henrys Inst Med Res, Monash Med Ctr, Clayton, Vic 3168, AustraliaMerchant-Larios, H, UNAM, Inst Invest Biomed, Dept Cell Biol & Physiol, Apartado Postal 70228, Mexico City 04510, DF, Mexico TI - Disturbed expression of Sox9 in pre-sertoli cells underlies sex-reversal in mice B6.Y-tir1 AB - Sry in some varieties of Mus musculus domesticus fails to form normal testis when introduced into the C57BL/6J (B6) strain. We studied the developmental pattern of pre-Sertoli cells that express Sox9 by immunofluorescence and the profile levels of Sox9 transcripts by semi quantitative reverse transcriptase polymerase chain reaction and in situ hybridization in developing gonads of B6-Y-tir mice. Sox9-positive cells (pre-Sertoli cells) appeared in all B6.Y-tir genital ridges at 11.5 and 12.5 days postcoitum (dpc). However, at 13.5 dpc, Sox9-positive cells were not detected only in 50% of the B6.Y-tir gonads compared with 100% of B6 gonads. Although pre-Sertoli cells formed the seminiferous cords after 14.5 dpc in the medial region of the B6.Y-tir. gonad, the cranial and caudal regions formed ovarian tissue. Further, B6.Y-tir ovaries have lower levels of Sox9 than ovotestes at all fetal stages. These results suggest that although the pre-Sertoli cell lineage forms in B6.Y-tir genital ridges, its further differentiation into Sertoli cells is apparently prevented. The cause may be the low levels of Sox9 and down-regulation of its product. Results suggest that inhibitory signals of Sox9 acting along the whole genital ridge or only at its cranial and/or caudal regions underlie formation of B6.Y-tir ovaries or ovotestes, respectively. Furthermore, our results suggest that infertility of B6.Y-tir females may be due to the abnormal presence of Sox9 transcripts in their ovaries MH - Australia MH - Mexico|Distrito Federal PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 7 U4 - Reproductive Biology U5 - J;Article AV - English IS - 0006-3363 UR - ISI:000187572500016 L2 - developmental biology;gene regulation;ovary;Sertoli cells;TESTIS-DETERMINING GENE; SRY-RELATED GENE; Y-CHROMOSOME; CAMPOMELIC DYSPLASIA; MOUSE GONAD; FEMALE; FERTILITY; MUTATIONS; RNA SO - Biology of Reproduction 2004 ;70(1):114-122 11758 UI - 4197 AU - Moreno-Ramos OH AU - Rodriguez-Casas J AU - Johnson D AU - Thompson TL AD - Univ Sonora, Dept Agr & Ganaderia, Hermosillo, Sonora, MexicoInst Tecnol Agropecuario Num 21, Valle del Yaqui, Sonora, MexicoUniv Arizona, Dept Soil Water & Environm Sci, Tucson, AZ, USARodriguez-Casas, J, Univ Sonora, Dept Agr & Ganaderia, Hermosillo, Sonora, Mexico TI - Wheat response to population density and bed spacing in northwest Mexico AB - The adoption of the wheat (Triticum aestivum L.) production on raised beds in NW Mexico has created a need to re-examine the traditional production technology, especially the population density (PD) and the distance between beds (DBB). The objective of this study was to determine the effect of these factors and their interaction on grain yield and other yield components of wheat in northwestern Mexico. An experiment was carried out during fall winter 1991-1992 at the Yaqui Valley Agricultural Experiment Station, which consisted of a complete factorial of three DBB; 0.80, 0.90, and 1.00 m, by 6 PD; 50, 100, 150, 200, 250, and 800 thousand plants per hectare (TPPH), in a randomized complete block design with four replications. Results indicated that yields were not modified when the DBB was changed. The response to PD was significant at the studied levels. The most important yield compensating factor for different PD was the number of tillers per plant (TPP), while the variations upon changing the DBB were explained apparently by increased number of spikes per square meter (SPSM). The optimum PD was around 150 TPPH, which is equivalent to the sowing of 6-8 kg of seed per hectare MH - Mexico|Sonora MH - USA PB - SZEGED: CEREAL RES INST RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0133-3720 UR - ISI:000224331700013 L2 - Triticum aestivum;wheat on beds;distance between beds;population density;TILL WINTER-WHEAT; SEEDING-RATE; IRRIGATED WHEAT; YIELD; DATE; REGION; GRAIN SO - Cereal Research Communications 2004 ;32(2):273-279 11759 UI - 5927 AU - Moreno A AU - Sazaki G AD - Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoTohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, JapanTohoku Univ, Interdisciplinary Res Ctr, Aoba Ku, Sendai, Miyagi 9808578, JapanMoreno, A, Univ Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Circuito Exterior,CU Delegac Coyoacan, Mexico City 04510, DF, Mexico TI - The use of a new ad hoc growth cell with parallel electrodes for the nucleation control of lysozyme AB - In this work, the effects of an internal electric field (a direct current) on the crystallization of hen egg-white lysozyme were investigated. The crystallization was carried out in solution and gel placed in a crystallization cell. This crystallization growth cell has two parallel Pt electrodes (0.2 mm diameter and 15 mm length), and those electrodes were in contact with crystallization media. A direct current of 2.0 muA was applied (1.9 x 10(-3)V) for 8 h in solution and 12 h in gel media. During the crystallization, no generation of gas was observed. Lysozyme crystals appeared only around the cathode (negatively charged electrode), while amorphous precipitation was observed around the anode (positively charged electrode). By applying the direct current, the number of the deposited crystals was significantly decreased, and consequently the size of the crystals was increased. The direct current also decreased the induction time of nucleation. No significant change in pH was observed during the crystallization. The deposition of the crystals only around the cathode and the decrease in the induction time can be explained by an opposite polarity of the lysozyme molecules and the electrodes and by interactions between the lysozyme molecules and the Cl- in the vicinity of the electrodes. Electric potential generated by an electric field would be also responsible for the decrease in the number of the deposited crystals. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000220345400068 L2 - biocrystallization;internal electric field;lysozyme;protein nucleation control;HETEROGENEOUS NUCLEATION; CRYSTALLIZATION; CRYSTALS; FIELD SO - Journal of Crystal Growth 2004 ;264(1-3):438-444 11760 UI - 5969 AU - Moreno D AU - Krothapalli A AU - Alkislar MB AU - Lourenco LM AD - Florida A&M Univ, Dept Mech Engn, Tallahassee, FL 32310, USAFlorida State Univ, Tallahassee, FL 32310, USAMoreno, D, Ctr Invest Opt AC, Mexico City, DF, Mexico TI - Low-dimensional model of a supersonic rectangular jet AB - The proper orthogonal decomposition method is applied to the analysis of particle image velocimetry data obtained for a supersonic rectangular jet operated at underexpanded conditions. Phase-locked velocity field data were used to calculate the eigenfunctions and the eigenvalues. It was found that a large fraction of the total energy is contained within the first two modes. The essential features of the jet are thus captured with only two functions. A low-dimensional model for the dynamical behavior is then constructed using Galerkin projection of the isentropic compressible Navier-Stokes equations. The reduced model compares reasonably well with the experimental findings MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000220255500049 L2 - PROPER ORTHOGONAL DECOMPOSITION; LARGE-SCALE STRUCTURES; PLANE MIXING LAYER; COHERENT STRUCTURES; BOUNDARY-LAYER; SHEAR-FLOW; PART 1; TURBULENCE; DYNAMICS; CHANNEL SO - Physical Review e 2004 ;69(2): 11761 UI - 5464 AU - Moreno E AU - de los Heros P AU - Guzman B AU - Bobadilla NA AU - Tovar C AU - Vazquez N AU - Poch E AU - Gamba G AD - Univ Nacl Autonoma Mexico, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr SZ, Mexico City 14000, DF, MexicoHosp Clin Barcelona, E-08036 Barcelona, Spain TI - A single nucleotide polymorphism that alters the activity of the renal Na-Cl cotransporter MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470702441 SO - Faseb Journal 2004 ;18(5):A1270-A1270 11762 UI - 5778 AU - Moreno E AU - Tovar-Palacio C AU - de los Heros P AU - Guzman B AU - Bobadilla NA AU - Vazquez N AU - Riccardi D AU - Poch E AU - Gamba G AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoIDIBAPS, Serv Nefrol, Barcelona 08036, SpainUniv Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, EnglandGamba, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Mol Physiol Unit, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - A single nucleotide polymorphism alters the activity of the renal Na+: Cl- cotransporter and reveals a role for transmembrane segment 4 in chloride and thiazide affinity AB - The thiazide-sensitive Na+: Cl- cotransporter is the major salt transport pathway in the distal convoluted tubule of the kidney, and a role of this cotransporter in blood pressure homeostasis has been defined by physiological studies on pressure natriuresis and by its involvement in monogenic diseases that feature arterial hypotension or hypertension. Data base analysis revealed that 135 single nucleotide polymorphisms along the human SLC12A3 gene that encodes the Na+: Cl- cotransporter have been reported. Eight are located within the coding region, and one results in a single amino acid change; the residue glycine at the position 264 is changed to alanine (G264A). This residue is located within the fourth transmembrane domain of the predicted structure. Because Gly-264 is a highly conserved residue, we studied the functional properties of this polymorphism by using in vitro mutagenesis and the heterologous expression system in Xenopus laevis oocytes. G264A resulted in a significant and reproducible reduction (similar to50%) in Na-22(+) uptake when compared with the wild type cotransporter. The affinity for extracellular Cl- and for thiazide diuretics was increased in G264A. Western blot analysis showed similar immunoreactive bands between the wild type and the G264A cotransporters, and confocal images of oocytes injected with enhanced green fluorescent protein-tagged wild type and G264A cotransporter showed no differences in the protein surface expression level. These observations suggest that the G264A polymorphism is associated with reduction in the substrate translocation rate of the cotransporter, due to a decrease in the intrinsic activity. Our study also reveals a role of the transmembrane segment 4 in defining the affinity for extracellular Cl- and thiazide diuretics MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 11 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000220747900105 L2 - SENSITIVE NACL-COTRANSPORTER; NA+-K+-2CL(-) COTRANSPORTER; FUNCTIONAL EXPRESSION; MOLECULAR-CLONING; ESCHERICHIA-COLI; BUMETANIDE BINDING; GITELMANS-SYNDROME; ION-TRANSPORT; DISTAL TUBULE; BETA-SUBUNIT SO - Journal of Biological Chemistry 2004 ;279(16):16553-16560 11763 UI - 4766 AU - Moreno J AU - Osorno JL AU - Morales J AU - Merino S AU - Tomas G AD - CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, E-28006 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol, Mexico City 04510, DF, MexicoMoreno, J, CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, J Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Egg colouration and male parental effort in the pied flycatcher Ficedula hypoleuca AB - A recent hypothesis posits that the bright colours of many avian eggs may act like signals of female genetic quality or condition to males in species with biparental care, inducing them to work harder for their offspring. We measured the colour of blue eggs of pied flycatchers Ficedula hypoleuca in Central Spain with a spectrophotometer on the day of laying, and also quantified the provisioning effort by males and females during the last days of the nestling period. Both chromaticity coordinates in the CIELAB colour space (blue to yellow, green to red) showed significant associations with male provisioning rates, explaining more than 20% of variation in male parental effort. Male provisioning rates were positively correlated with nestling condition, thereby potentially contributing to female fitness. This evidence is only tentative until experimental confirmation, but suggests that males are affected by the colour of their mates' eggs, a possibility not considered hitherto in the study of sexual selection MH - Mexico|Distrito Federal MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 21 U4 - Ornithology U5 - J;Article AV - English IS - 0908-8857 UR - ISI:000223085900003 L2 - SEXUAL SELECTION; NESTLINGS; IMMUNITY SO - Journal of Avian Biology 2004 ;35(4):300-304 11764 UI - 4781 AU - Moreno KJ AU - Mendoza-Suarez G AU - Fuentes AF AU - Garcia-Barriocanal J AU - Leon C AU - Santamaria J AD - IPN, CINVESTAV, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoUniv Complutense Madrid, Fac Fis, GFMC, Dpto Fis Aplicada 2, E-28040 Madrid, SpainMoreno, KJ, IPN, CINVESTAV, Unidad Saltillo, Apdo Postal 663, Saltillo 25000, Coahuila, Mexico TI - Oxygen mobility in A(2)Ti(2-y)Zr(y)O(7) (A : Y, Gd) ionic conductors AB - We report a study of ionic conductivity in the series Y2Ti2-yZryO7 and Gd2Ti2-yZryO7 (0less than or equal toyless than or equal to2) obtained by mechanochemical synthesis. We present a study of oxygen ion dynamics in these materials by Impedance Spectroscopy. The change in dc conductivity and activation energy with Zr content is interpreted in terms of the increase in the number of oxygen vacancies and of structural disorder when increasing Zr content MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000223052500008 L2 - Ionic mobility;pyrochlores;mechanochemical synthesis;impedance spectroscopy;ELECTRONIC CONDUCTION; PYROCHLORE; DIFFUSION; DISORDER; FLUORITE; OXIDES SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(4):759-763 11765 UI - 3924 AU - Moriarty-Craige SE AU - Ramakrishnan U AU - Neufeld L AU - Rivera J AU - Martorell R AD - Emory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322, USAEmory Univ, Gradi Div Biol & Biomed Sci, Program Nutr & Hlth Sci, Atlanta, GA 30322, USACtr Invest Nutr & Salud, Inst Nacl Salud Publ, Cuernavaca, Morelos, MexicoRamakrishnan, U, Emory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322 USA TI - Multivitamin-mineral supplementation is not as efficacious as is iron supplementation in improving hemoglobin concentrations in nonpregnant anemic women living in Mexico AB - Background: Iron supplements improve hemoglobin status and reduce anemia due to iron deficiency. It is not known whether multiple micronutrient (MM) supplements are as efficacious as are iron supplements alone in improving hemoglobin concentrations. Objective: We conducted a randomized, double-blind community trial in Mexico to compare the efficacy of MM supplements containing iron with that of iron alone in improving hemoglobin concentrations in nonpregnant women. Design: Nonpregnant women (n = 158) were recruited from a semirural community in Mexico and were randomly assigned to receive iron alone (60 mg; Fe group) or MM supplements (vitamins A, B complex, C, D, E, and K and iron, zinc, and magnesium; MM group) 6 d/wk in their home for 12 wk. Hemoglobin concentrations were measured in capillary blood samples at baseline and follow-up. Results: The treatment groups (MM: n = 75; Fe: n = 77) did not differ significantly at recruitment in age, schooling, literacy, or socioeconomic status. There were no significant differences between groups in compliance (median: 97.5%), baseline hemoglobin concentrations, or prevalence of anemia (20%). Losses to follow-up (4%) and mean (+/-SD) changes in hemoglobin (MM group: 6.7 +/- 10.6 g/L; Fe group: 7.1 +/- 13.6 g/L) were not significantly different between groups. However, the change in hemoglobin in anemic subjects was greater in the Fe group than in the MM group (P < 0.05 for interaction), and there was no significant difference in nonanemic subjects. Conclusions: MM supplements may not be as efficacious as is iron alone in improving the hemoglobin status of anemic women MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 3 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000225036000028 L2 - iron;multivitamin-mineral supplements;hemoglobin;anemia;nonpregnant women;RANDOMIZED CONTROLLED-TRIAL; VITAMIN-A; ZINC; DEFICIENCY; PREGNANCY; ABSORPTION; COMMUNITY SO - American Journal of Clinical Nutrition 2004 ;80(5):1308-1311 11766 UI - 5853 AU - Morisset C AU - Schaerer D AU - Bouret JC AU - Martins F AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCNRS, Lab Astrophys Marseille, F-13376 Marseille 12, FranceObserv Geneva, CH-1290 Sauverny, SwitzerlandObserv Midi Pyrenees, Astrophys Lab, UMR 5572, F-31400 Toulouse, FranceMorisset, C, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Mid-IR observations of Galactic HII regions: Constraining ionizing spectra of massive stars and the nature of the observed excitation sequences AB - Extensive photoionization model grids for single star H II regions using state-of-the-art stellar atmosphere models have been computed to test their predicted ionizing spectra against recent ISO mid-IR observations of Galactic H II regions. Particular care has been paid to examining in detail the dependences of the nebular properties on the numerous nebular parameters which are generally unconstrained. Provided the ionization parameter U is fairly constant on average and the atomic data correct these comparisons show the following: - Both recent non-LTE codes including line blanketing and stellar winds (WM-Basic and CMFGEN) show a reasonable agreement with the observations, although non-negligible differences between their predicted ionizing spectra are found. Recurrently none of the models can be preferred over the other. -The softening of the ionizing spectra with increasing metallicity predicted by the WM-Basic models is found to be too strong. -We confirm earlier indications that the CoStar atmospheres, including an approximate treatment of line blanketing, overpredict somewhat the ionizing flux at high energies. -Both LTE and non-LTE plane parallel hydrostatic atmosphere codes predict ionizing spectra that are too soft, especially over the energy range between 27.6, 35.0, and 41.1 eV and above. The inclusion of wind effects is crucial for accurate predictions of ionizing fluxes. These conclusions are found to be robust to effects such as changes of U, stellar metallicity changes, and the inclusion of dust. Uncertainties due to atomic data (especially for Ar) are discussed. We also discuss the difficulties in estimating absolute stellar temperatures from mid-IR line ratios. Finally we have examined which parameters are chiefly responsible for the observed mid-IR excitation sequences. The galactic gradient of metallicity changing the shape of the stellar emission is found to be one of the drivers for the excitation sequence of Galactic H II regions, the actual contribution of this effect being finally atmosphere model dependent. The observed excitation scatter can be explained by effects due to statistical sampling of the IMF leading to a T-eff dispersion plus additional dispersion of U MH - France MH - Mexico|Distrito Federal MH - Switzerland PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000188936100024 L2 - ISM : abundances;ISM : dust, extinction;ISM : HII regions;ISM : lines and bands;atomic data;stars : atmospheres;H-II REGIONS; BLANKETED MODEL ATMOSPHERES; COMBINED STELLAR STRUCTURE; PHOTOIONIZATION MODEL; O-STARS; IONIZATION STRUCTURE; RATE COEFFICIENTS; ISO SPECTROSCOPY; LUMINOUS STARS; MAIN-SEQUENCE SO - Astronomy & Astrophysics 2004 ;415(2):577-594 11767 UI - 3978 AU - Morriss C AU - Trawford A AU - Svendsen E AU - Soulsby AU - Trawford AF AU - Matthews JB AU - de Aluja AS AU - Dorchies P AU - Gebreab F AU - Pangui LJ AU - Krecek RC AD - Donkey Sanctuary, Sidmouth EX10 0NU, Devon, EnglandMoredun Res Inst, Div Parasitol, Midlothian EH26 0PZ, ScotlandNatl Autonomous Univ Mexico, Sch Vet Med, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, DS ILPH UNAM Programme, Mexico City 04510, DF, MexicoEcole Natl Vet Toulouse, Toulouse, FranceFac Vet, Debre Zeit, EthiopiaEcole Inter Etats Sci & Med Vet, Dakar, SenegalUniv Pretoria, Fac Nat & Agr Sci, Dept Zool & Entomol, ZA-0002 Pretoria, South AfricaMorriss, C, Donkey Sanctuary, Sidmouth EX10 0NU, Devon, England TI - Donkey: hero or villain of the parasite world? Past, present and future AB - This collection of articles provides an account of five presentations delivered at the 19th International Conference of the World Association for the Advancement of Veterinary Parasitology (WAAVP) (held in New Orleans, Louisiana, USA, from 10 to 14 August 2003) in a symposium session on Donkey parasites, organised by Andrew Trawford and Catherine Morriss and moderated by Dr. Elisabeth Svendsen. The focus was on the role of the donkey in the advancement of parasitology, diagnosis and identification, methods of control and anthelmintic resistance MH - United Kingdom MH - Ethiopia MH - France MH - Mexico|Distrito Federal MH - Senegal MH - South Africa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000224789000004 L2 - donkey;cyathostomins;lungworm;liver fluke;tapeworm;anthelmintics;resistance;alternative;treatments;MHC Rhinoestrus spp.;Duddingtonia flagrans SO - Veterinary Parasitology 2004 ;125(1-2):43-58 11768 UI - 5145 AU - Morrone JJ AU - Mazzucconi SA AU - Bachmann AO AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428 Buenos Aires, DF, ArgentinaNatl Autonomous Univ Mexico, Fac Ciencias, Dept Evolut Biol, Museo Zool, Mexico City 04510, DF, MexicoMorrone, JJ, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, Ciudad Univ,C1428EHA, RA-1428 Buenos Aires, DF, Argentina TI - Distributional patterns of chacoan water bugs (Heteroptera : Belostomatidae, Corixidae, Micronectidae and Gerridae) AB - Distributional patterns of South American species of aquatic and semiaquatic Heteroptera from the Chaco biogeographic province were analyzed. Based on a track analysis of 60 species of Belostomatidae, Corixidae, Micronectidae, and Gerridae, five generalized tracks were found: ( 1) Bolivia, and northwestern and central Argentina (Belostoma dallasi, Ectemnostega montana, E. quechua, E. stridulata, E. venturii, Sigara tucma, S. yala, Tenagobia pulchra, Eurygerris fuscinervis, and Trepobates taylori); ( 2) southern Brazil, eastern Bolivia, Paraguay, and northeastern Argentina ( Belostoma bosqi, Heterocorixa brasiliensis, Tenagobia selecta tarahui, and T. schadei); ( 3) southeastern Brazil and northeastern Argentina ( Belostoma candidulum, B. testaceopallidum, Heterocorixa nigra, Sigara hungerfordi, Brachymetra furva, Halobatopsis spiniventris, Metrobates plaumanni plaumanni, and M. vigilis); ( 4) southeastern Brazil, Uruguay, and central western Argentina ( Belostoma cummingsi, B. martini, Sigara argentiniensis, Tenagobia fuscata, and T. carapachay); and ( 5) southern ( Trichocorixa milicorum, Sigara santiagiensis, and S. forciceps). Three panbiogeographic nodes have been determined: ( 1) northeastern Argentina, in the intersection of generalized tracks 2 and 3; ( 2) central Argentina, in the intersection of generalized tracks 1 and 4; and ( 3) central Argentina, in the intersection of generalized tracks 4 and 5. In spite of these complex patterns, these results show that the Chaco province appears to be a natural biogeographic area MH - Argentina MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000222264300015 L2 - Heteroptera;Belostomatidae;Corixidae;Micronectidae;Gerridae;biogeography;South America;Neotropics;Chacoan subregion;Chaco province;TREPOBATINAE HETEROPTERA; SURROUNDING REGIONS; SOUTH-AMERICA; WORLD FAUNA; NEW-GUINEA; BIOGEOGRAPHY; CRUSTACEA; BERGROTH SO - Hydrobiologia 2004 ;523(1-3):159-173 11769 UI - 4427 AU - Morrow AL AU - Ruiz-Palacios GM AU - Altaye M AU - Jiang X AU - Guerrero ML AU - Meinzen-Derr JK AU - Farkas T AU - Chaturvedi P AU - Pickering LK AU - Newburg DS AD - Cincinnati Childrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USA. Cincinnati Childrens Hosp, Med Ctr, Div Infect Dis, Cincinnati, OH 45229, USA. Inst Nacl Ciencias Med & Nutr, Dept Infectol, Mexico City, DF, Mexico. Univ Massachusetts, Sch Med, Shriver Ctr, Program Glycobiol, Waltham, MA 02452, USA. Ctr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USA TI - Human milk oligosaccharide blood group epitopes and innate immune protection against campylobacter and calicivirus diarrhea in breastfed infants MH - Mexico|Distrito Federal MH - USA T3 - PROTECTING INFANTS THROUGH HUMAN MILKAdvances in experimental medicine and biology PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - ON REQUEST (05/05/08) U4 - Medicine, Research & Experimental U5 - S;Article NT - SEnglishArticleardythe.morrow@cchmc.org jason.jiang@cchmc.org mlga@quetzal.innsz.mx Jareen.meinzen-derr@cchmc.org david.newburg@umassmed.edu0233 SPRING ST, NEW YORK, NY 10013 USAADVAN EXPERIMENT MED BIOLBAU75 AV - English IS - 0065-2598 UR - ISI:000223641000058 SO - 2004 ;():443-446 11770 UI - 4445 AU - Morrow AL AU - Ruiz-Palacios GM AU - Altaye M AU - Jiang X AU - Guerrero ML AU - Meinzen-Derr JK AU - Farkas T AU - Chaturvedi P AU - Pickering LK AU - Newburg DS AD - Childrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USAInst Natl Ciencias Med & Nutr, Mexico City, DF, MexicoUniv Massachusetts, Shriver Ctr, Sch Med, Waltham, MA, USACtr Dis Control & Prevent, Atlanta, GA, USAMorrow, AL, Childrens Hosp, Med Ctr, Ctr Biostat & Epidemiol, 3333 Burnet Ave,ML 5041, Cincinnati, OH 45229 USA TI - Human milk oligosaccharides are associated with protection against diarrhea in breast-fed infants AB - Objective To determine the association between maternal mills levels of 2-linked fueosylated oligosaeeharide acid prevention of diarrhea as a result of Campylobacter, caliciviruses, and diarrhea of all causes in breast-fed infants. Study design Data and banked samples were analyzed from 93 breast-feeding mother-infant pairs who were prospectively studied during 1988-1991 from birth to 2 years with infant feeding and diarrhea data collected weekly; diarrhea was diagnosed by a study physician. Milk samples obtained 1 to 5 weeks postpartum were analyzed for oligosaccharide content. Data were analyzed by Poisson regression. Results Total 2-linked fucosyloligosaccharide in maternal milk ranged from 0.8 to 20.8 mmol/L (50%-92% of milk oligosaccharide). Moderate-to-severe diarrhea of all causes (n = 77 cases) occurred less often (P = .001) in infants whose milk contained high levels of total 2-linked fucosylofigosaccharide as a percent of milk oligosaccharide. Campylobacter diarrhea (n = 31 cases) occurred less often (P = .004) in infants whose mother's milk contained high levels of 2'-FL, a specific 2-linked fucosyloligosaccharide, and calicivirus diarrhea (n = 16 cases) occurred less often (P = .012) in infants whose mother's milk contained high levels of lacto-N-difucohexaose (LDFH-I), another 2-linked fucosyloligosaecharide. Conclusion This study provides novel evidence suggesting that human milk oligosaccharides are clinically relevant to protection against infant diarrhea MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 20 U4 - Pediatrics U5 - J;Article AV - English IS - 0022-3476 UR - ISI:000223857400008 L2 - BLOOD GROUP ANTIGENS; FUCOSYLATED OLIGOSACCHARIDES; ROTAVIRUS INFECTION; HUMAN CALICIVIRUSES; ESCHERICHIA-COLI; LEWIS; INDIVIDUALS; NORWALK; FUCOSYLOLIGOSACCHARIDES; ENTEROTOXIN SO - Journal of Pediatrics 2004 ;145(3):297-303 11771 UI - 3964 AU - Mostefaoui A AU - Rajsbaum S AU - Raynal M AD - IRISA, F-35042 Rennes, FranceUNAM, Inst Matemat, Mexico City 04510, DF, MexicoMostefaoui, A, IRISA, Campus Beaulieu, F-35042 Rennes, France TI - The synchronous condition-based consensus hierarchy AB - In the context of a system made up of n processes where at most t can crash, the condition-based approach studies restrictions on the inputs of a distributed problem, called conditions, that make it solvable, or easier to solve (in case it is solvable without restricting its inputs). Previous work studied conditions for consensus and other agreement problems, mostly for asynchronous systems. This paper considers the condition-based approach for consensus in synchronous systems, and establishes a bridge between the asynchronous and synchronous models, with a hierarchy S-t([-t]) subset of (...) subset of S-t([0]) subset of (...) subset of S-t([t]) where S-t([t]) includes all conditions (and in particular the trivial one made up of all possible input vectors). For a condition C is an element of S-t([d]), -t less than or equal to d less than or equal to t, we have: - For values of d less than or equal to 0 we have the hierarchy of conditions (we introduced in PODC'01) where consensus is solvable by more and more efficient protocols in an asynchronous system with t failures, as we go from d = 0 to d = -t. - For values of d > 0 consensus is not solvable in an asynchronous system with t failures, but it is solvable in a synchronous system with more and more rounds, as we go from d = 1 (two rounds) to d = t (t + 1 rounds). - d = 0 is the borderline case where consensus is solvable in an asynchronous system with t failures, and optimally in a synchronous system (we proved this in DISC'03). The two main results of this paper are proving the second item above. For the upper bound, the paper presents a generic synchronous early-deciding uniform consensus protocol. When instantiated with a condition C G S-t([d]), 1 less than or equal to d less than or equal to t < n, the processes decide in at most min(alpha + 1, f + 2, t + 1) where f is the number of actual crashes, and alpha = d if the input vector belongs to C, or a = +infinity otherwise. The paper establishes a corresponding lower bound stating that d + 1 rounds are necessary to get a decision when the input vector belong to C MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224550400001 L2 - condition;consensus;early deciding;input vector;message passing;process crash failure;synchronous distributed system;UNRELIABLE FAILURE DETECTORS; DISTRIBUTED SYSTEMS; SOLVABILITY; PROTOCOLS; AGREEMENT; FAULTS; PROOF SO - Distributed Computing, Proceedings 2004 ;3274():1-15 11772 UI - 6172 AU - Mostefaoui A AU - Rajsbaum S AU - Raynal M AU - Roy M AD - IRISA, F-35042 Rennes, FranceUNAM, Inst Matemat, Mexico City 04510, DF, MexicoMostefaoui, A, IRISA, Campus Beaulieu, F-35042 Rennes, France TI - Condition-based consensus solvability: a hierarchy of conditions and efficient protocols AB - The condition-based approach for consensus solvability consists of identifying sets of input vectors, called conditions, for which there exists an asynchronous protocol solving consensus despite the occurrence of up to f process crashes. This paper investigates C-f, the largest set of conditions which allow us to solve the consensus problem in an asynchronous shared memory system. The first part of the paper shows that C-f is made up of a hierarchy of classes of conditions, C-f([d]) where d is a parameter (called degree of the condition), starting with d=min(n-f, f) and ending with d=0, where C-f([0])=Cf. We prove that each one is strictly contained in the previous one: C-f([d]) subset of C-f([d-1]). Various properties of the hierarchy are also derived. It is shown that a class can be characterized in two equivalent but complementary ways: one is convenient for designing protocols while the other is for analyzing the class properties. The paper also defines a linear family of conditions that can be used to derive many specific conditions. In particular, for each d, two natural conditions are presented. The second part of the paper is devoted to the design of efficient condition-based protocols. A generic condition-based protocol is presented. This protocol can be instantiated with any condition C, C is an element of C-f([d]), and requires at most (2n+1) [log(2)([(f-d)/2]+1)] shared memory read/write operations per process in the synchronization part of the protocol. Thus, the value (f-d) represents the " difficulty" of the class C-f([d]). An improvement of the protocol for the conditions in C-f([0]) is also presented MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 9 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0178-2770 UR - ISI:000189199100001 L2 - asynchronous system;collect;condition;consensus;fault-tolerance;input vector;snapshot;shared memory;step complexity;ATOMIC SNAPSHOTS; AGREEMENT; SYSTEMS; IMPOSSIBILITY; FAULTS; TASKS SO - Distributed Computing 2004 ;17(1):1-20 11773 UI - 5146 AU - Moukarzel CF AU - Pacheco-Martinez H AU - Ruiz-Suarez JC AU - Vidales AM AD - IPN, CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoUniv Nacl San Luis, Dept Fis, San Luis, ArgentinaMoukarzel, CF, IPN, CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, Mexico TI - Static response in disk packings AB - We present experimental and numerical results for displacement response functions in packings of rigid frictional disks under gravity. The central disk on the bottom layer is shifted upwards by a small amount, and the motions of disks above it define the displacement response. Disk motions are measured with the help of a still digital camera. The responses so measured provide information on the force-force response, that is, the excess force at the bottom produced by a small overload in the bulk. We find that, in experiments, the vertical-force response shows a Gaussian-like shape, broadening roughly as the square root of distance, as predicted by diffusive theories for stress propagation in granulates. However, the diffusion coefficient obtained from a fit of the response width is ten times larger than predicted by such theories. Moreover we notice that our data is compatible with a crossover to linear broadening at large scales. In numerical simulations on similar systems (but without friction), on the other hand, a double-peaked response is found, indicating wave-like propagation of stresses. We discuss the main reasons for the different behaviors of experimental and model systems, and compare our findings with previous works MH - Argentina MH - Mexico|Yucatan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 8 U4 - Materials Science, Multidisciplinary;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 1434-7636 UR - ISI:000222218100007 L2 - isostaticity;response functions;friction;disk packings;wave equation;ROBUST PROPAGATION DIRECTION; MINIMAL GRANULAR PACKING; STRESS-DISTRIBUTION; FORCE FLUCTUATIONS; NONLOCAL APPROACH; BEAD PACKS; MATTER; MODEL; DISTRIBUTIONS; FRICTION SO - Granular Matter 2004 ;6(1):61-66 11774 UI - 5073 AU - Moya-Camarena SY AU - Castellanos-Tapia L AU - Ayala J AU - Yepiz-Plascencia GM AU - Belury MA AD - CIAD, AC, Human Nutr, Hermosillo 83000, Sonora, MexicoCIAD, AC, Mol Biol Aquat Organisms, Hermosillo 83000, Sonora, MexicoOhio State Univ, Columbus, OH 43210, USA TI - Dietary conjugated linoleic acid (CLA) modulates lipoprotein lipase and apolipoprotein CIII mRNA accumulation in muscle and adipose tissue in mice MH - Mexico|Sonora MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602428 SO - Faseb Journal 2004 ;18(4):A504-A504 11775 UI - 6064 AU - Moya-Raygoza G AD - Univ Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Dept Bot & Zool, Jalisco, MexicoUniv Oxford, Dept Zool, Oxford OX1 3PS, EnglandLuther Coll, Dept Biol, Decorah, IA 52101, USAMoya-Raygoza, G, Univ Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Dept Bot & Zool, Km 15-5 Carretera Guadalajara Nogales,Codigo Post, Jalisco, Mexico TI - Dry season parasitoids of adult corn leafhoppers (Hemiptera : Cicadellidae) on irrigated maize in Mexico AB - Parasitoids of adult corn leafhoppers, Dalbulus maidis (DeLong et Wolcott), were studied in irrigated maize (Gramineae) growing during the dry season in Mexico. Dalbulus maidis was parasitized by Metadorylas spinosus (Hardy) (Diptera: Pipunculidae), Halictophagus naulti Kathirithamby et Moya-Raygoza (Strepsiptera: Halictophagidae), and Gonatopus bartletti Olmi (Hymenoptera: Dryinidae) at 24 of the 54 sites where A maidis were collected. Greater rates of parasitism occurred at higher elevations (R-2 = 0.41) and at more southern latitudes (R-2 = -0.52). Metadorylas spinosus is a previously unreported parasitoid of D. maidis, and this is the first report of H. naulti parasitizing Dalbulus elimatus (Ball) and Dalbulus gelbus DeLong. Gonatopus bartletti has the broadest geographic and temporal distribution of the parasitoids found MH - United Kingdom MH - Mexico|Jalisco MH - USA PB - OTTAWA: ENTOMOL SOC CANADA RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0008-347X UR - ISI:000220109400007 L2 - DALBULUS-MAIDIS DELONG; ELIMATUS BALL HOMOPTERA; WOLCOTT; STREPSIPTERA; DRYINIDAE; VECTORS; DISEASE SO - Canadian Entomologist 2004 ;136(1):119-127 11776 UI - 4581 AU - Moya F AU - Gadzinowski J AU - Bancalari E AU - Salinas V AU - Koleman B AU - Bancalari A AU - Kornacka M AU - Segal R AU - Schaber C AU - Tsai H AD - Univ Texas, Houston, TX, USAUniv Posnan, Poznan, PolandUniv Miami, Miami, FL 33152, USAINPer, Mexico City, DF, MexicoUniv Sao Paulo, Sao Paulo, BrazilHosp Guillermo Grant, Concepcion, ChileUniv Warsaw, Warsaw, PolandDiscovery Labs Inc, Doylestown, PA, USA TI - Superiority of a novel surfactant, Surfaxin (R) (Lucinactant), over Exosurf (R) in preventing respiratory distress syndrome in very preterm infants: A pivotal, multinational, randomized trial MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - Poland MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591102708 SO - Pediatric Research 2004 ;55(4):466A-466A 11777 UI - 4512 AU - Moya FRM AU - Gadzinowski JG AU - Bancalari EB AU - Salinas VS AU - Kopelman BK AU - Bancalari AB AU - Kornacka MK AU - Segal RS AU - Schaber CS AU - Tsai HT AD - Univ Texas, Houston, TX, USAKarol Marcinkowski Univ Med Sci, Clin Neonatol, Poznan, PolandUniv Miami, Jackson Mem Hosp, Sch Med, Div Neontol, Miami, FL 33136, USAInst Nacl Perinainlogia Pediat, Mexico City, DF, MexicoUniv Sao Paulo, Sao Paulo, BrazilHosp Guillermo Grant, Concepcion, ChileWarsaw Univ, Warsaw, Poland TI - Superiority of a novel surfactant, surfaxin (lucinactant), over exosurf (colfosceril palmitate) in prevnting respiratory distress syndrome in very preterm infants: A pivotal, multinational, randomized trial MH - Brazil MH - Chile MH - Mexico|Distrito Federal MH - Poland MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000223597300218 SO - Pediatric Research 2004 ;56(3):497-497 11778 UI - 5926 AU - Mozuras A AU - Podzharov E AD - Res Lab Akustika, LT-2006 Vilnius, LithuaniaUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoUniv Panamericana, Zapopan 45010, Jalisco, MexicoMozuras, A, Muitines 13-57, LT-2006 Vilnius, Lithuania TI - Measurement of large harmonic vibration amplitudes AB - The greater the linearity of a transducer, the more suitable it is for vibration measurement. However, purely linear transducers are not available. It is very common to only use a transducer in a narrow range, where its converting characteristic is close to linear. Unfortunately, only a low signal level can thus be obtained. Therefore, the use of linear features in the measurement process causes non-linear distortions as well as a low signal-to-noise ratio. In this paper, a method for measurement of harmonic vibration amplitudes is presented that allows one to eliminate the above drawbacks. This method allows the extension of the range available for vibration measurement. It could be used, for example, in measurement of standing waves, calibration of devices, etc. This method also gives the ability to obtain maps of the vibration amplitudes with increased surface resolution. (C) 2003 Elsevier Ltd. All rights reserved MH - Lithuania MH - Mexico|Jalisco PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Acoustics;Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0022-460X UR - ISI:000220284900026 SO - Journal of Sound and Vibration 2004 ;271(3-5):985-998 11779 UI - 6386 AU - Mumby PJ AU - Edwards AJ AU - rias-Gonzalez JE AU - Lindeman KC AU - Blackwell PG AU - Gall A AU - Gorczynska MI AU - Harborne AR AU - Pescod CL AU - Renken H AU - Wabnitz CCC AU - Llewellyn G AD - Univ Exeter, Sch Biol & Chem Sci, Marine Spatial Ecol Lab, Exeter EX4 4PS, Devon, EnglandUniv Newcastle Upon Tyne, Sch Biol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandCINVESTAV, Unidad Merida, Dept Recursos Mar, Lab Ecol Ecosistemas Arrecifes Coralinos, Merida 97310, Yucatan, MexicoEnvironm Def, Caribbean Field Off, Miami, FL 33186, USAUniv Sheffield, Dept Probabil & Stat, Sheffield S3 7RH, S Yorkshire, EnglandUniv British Columbia, Lower Mall Res Stn, Fisheries Ctr, Vancouver, BC V6T 1Z4, CanadaWWF US, Conservat Sci Program, Washington, DC 20037, USAMumby, PJ, Univ Exeter, Sch Biol & Chem Sci, Marine Spatial Ecol Lab, Prince Wales Rd, Exeter EX4 4PS, Devon, England TI - Mangroves enhance the biomass of coral reef fish communities in the Caribbean AB - Mangrove forests are one of the world's most threatened tropical ecosystems with global loss exceeding 35% (ref. 1). Juvenile coral reef fish often inhabit mangroves(2-5), but the importance of these nurseries to reef fish population dynamics has not been quantified. Indeed, mangroves might be expected to have negligible influence on reef fish communities: juvenile fish can inhabit alternative habitats and fish populations may be regulated by other limiting factors such as larval supply or fishing(6). Here we show that mangroves are unexpectedly important, serving as an intermediate nursery habitat that may increase the survivorship of young fish. Mangroves in the Caribbean strongly influence the community structure of fish on neighbouring coral reefs. In addition, the biomass of several commercially important species is more than doubled when adult habitat is connected to mangroves. The largest herbivorous fish in the Atlantic, Scarus guacamaia, has a functional dependency on mangroves and has suffered local extinction after mangrove removal. Current rates of mangrove deforestation are likely to have severe deleterious consequences for the ecosystem function, fisheries productivity and resilience of reefs. Conservation efforts should protect connected corridors of mangroves, seagrass beds and coral reefs MH - Canada MH - United Kingdom MH - Mexico|Yucatan MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 92 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000188721800039 L2 - SEAGRASS BEDS; HABITATS; BAY SO - Nature 2004 ;427(6974):533-536 11780 UI - 6563 AU - Munguia P AD - Florida State Univ, Dept Biol Sci, Tallahassee, FL 32306, USAAC, Inst Biol Ecol & Conservac, Las Fuentes 45070, Zapopan, MexicoMunguia, P, Florida State Univ, Dept Biol Sci, B-157, Tallahassee, FL 32306 USA TI - Successional patterns on pen shell communities at local and regional scales AB - 1.I present a successional study of marine organisms on pen shells (Atrina rigida) at different regions of St Joe Bay, Florida. By incorporating measures of relative abundance and assembly time I show how the relationship between local and regional diversity develops through different successional stages. 2. The results showed that, with time, motile species richness increases significantly while evenness indices remain high and constant. Sessile species, on the other hand, increased in both species richness and evenness through time. 3. For the motile species, regions seem to remain different while local saturation is observed. These results suggest that this group is under species-sorting: species are mobile enough that recruits and adult dispersal within a region maintain differences among regions, while local communities are saturated. 4. For the sessile species, the local-regional relationship was unsaturated at all sampling dates with both untransformed and rarefied data. Regions are initially similar in community structure, then differ through time to become similar again at the last sampling date. This may reflect a priority effect: propagules that arrive at a shell may initially exert influence on the species composition on a shell, so that at intermediate sampling times regions differ in community structure. However, at the last sampling there were no differences detected among regions, suggesting that dispersal distances might be larger for this group of species. 5. These results suggest the following. (1) The degree of species saturation will depend on the successional stage of a community. (2) Incorporating species abundances (i.e. through rarefaction or other techniques) demonstrates the role of species commonness or rarity in determining patterns of community diversity at different scales. (3) Depending on the group of species studied, the size of the region will vary and will influence the local-regional dynamics: the perceived region for sessile species may be larger than for motile species MH - USA MH - Mexico|Jalisco PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Zoology U5 - J;Article AV - English IS - 0021-8790 UR - ISI:000187847400007 L2 - Atrina rigida;benthic community;colonization;diversity;spatial scale;SPECIES RICHNESS; DIVERSITY; SATURATION; BUTTERFLYFISHES; COEXISTENCE; ABUNDANCE; DYNAMICS SO - Journal of Animal Ecology 2004 ;73(1):64-74 11781 UI - 3986 AU - Munoz-Delgado J AU - Corsi-Cabrera M AU - Canales-Espinosa D AU - Santillan-Doherty AM AU - Erkert HG AD - Inst Nacl Psychiat, Dept Etol Psicobiol & Conducta, Mexico City 14370, DF, MexicoUniv Nacl Autonoma Mexico, Fac Psicol, Lab Sueno, Mexico City 04510, DF, MexicoUniv Tubingen, Inst Zool, D-72074 Tubingen, GermanyMunoz-Delgado, J, Inst Nacl Psychiat, Dept Etol Psicobiol & Conducta, Antiguo Camino Xochimilco 101, Mexico City 14370, DF, Mexico TI - Astronomical and meteorological parameters and rest-activity rhythm in the Spider monkey Ateles geoffroyi AB - All animals including primates show regular variations in their behavioural activities and physiological functions. In numerous species diel, ultradian, infradian, annual and/or lunar rhythms have been established; however, the use of the focal sampling method does not provide information on hour-to-hour nor day-to-day variations. In behavioural field studies dealing with primate activity rhythms and their modulation by environmental variables the possible dual, synchronizing and/or masking effect of these variables is often ignored. In the present study, we analyze the relation between astronomical and meteorological parameters and various parameters of the rest-activity rhythm in Ateles geoffroyi, a species scarcely investigated with respect to biological rhythms. These Ateles were kept under semi-natural conditions, exposed to natural light, temperature and humidity cycles, and sky state. Motor activity was recorded with actiwatch accelerometers during 180 days (5-min intervals), starting from the autumn equinox. Results: Ateles is active throughout the day, rests during the night and presents bimodal activity. Activity time, onset and end of activity as well as the times of their two activity peaks were significantly correlated with duration of the solar day and sunrise or sunset time. The behavioural parameters also correlated with ambient temperature. Climate factors and sky-state significantly influenced the duration and times of onset and end of activity. Our findings identified a clear modulation of the rest activity pattern by astronomical variables serving as Zeitgebers, such as the natural light-dark cycle, and by masking effects of meteorological factors (temperature, weather and cloudiness), as well as of artificial variables introduced by the interaction with man. (C) 2004 Elsevier Inc. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Psychology, Biological;Behavioral Sciences U5 - J;Article AV - English IS - 0031-9384 UR - ISI:000224780600014 L2 - primates;rest activity rhythm;actigraphy;motor activity;cebidae;Zeitgeber;masking;EULEMUR-FULVUS-RUFUS; CATHEMERAL ACTIVITY; NOCTURNAL PRIMATES; FOOD AVAILABILITY; TEMPERATURE; LEMUR; DIET; MADAGASCAR; RUBRIVENTER; MOONLIGHT SO - Physiology & Behavior 2004 ;83(1):107-117 11782 UI - 3575 AU - Munoz-Gutierrez M AU - Blache D AU - Martin GB AU - Scaramuzzi RJ AD - Univ London Royal Vet Coll, Dept Vet Basic Sci, London NW1 0TU, EnglandUniv Western Australia, Sch Anim Biol, Crawley, WA 6009, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Reprod Biol, Mexico City 09340, DF, MexicoMunoz-Gutierrez, M, Univ London Royal Vet Coll, Dept Vet Basic Sci, Royal Coll St, London NW1 0TU, England TI - Ovarian follicular expression of mRNA encoding the type IIGF receptor and IGF-binding protein-2 in sheep following five days of nutritional supplementation with glucose, glucosamine or lupins AB - The IGF system is associated with ovarian folliculogenesis. The effect of the IGFs mediated through the type I receptor (IGF-IR) and IGF-binding protein-2 (IGFBP-2), is to regulate the growth and atresia of follicles. To test if the mRNAs for IGF-IR and IGFBP-2 are differentially regulated in the follicle we used nutritional treatments that stimulate folliculogenesis and measured, by in situ hybridisation, their mRNAs expression. Groups of five anoestrous Merino ewes were fed wheat straw (control) or the control diet supplemented with lupins (500 g/day). Other ewes were fed the control diet and infused with glucose (50 mmol/h) or with glucosamine (3.5 mmol/h). Intravaginal progestagen sponges were inserted for 12 days, and nutritional treatments were started 5 days before progestagen removal. Follicular development was studied after an artificial follicular phase, simulated by progestagen for 12 days and a regime of GnRH pulses given for 36 h following progestagen withdrawal, when the animals were killed. The ovaries were collected and stored at - 80degreesC until sectioning at 10 mum. Every 25-28th and 29-32nd section was probed for IGF-IR and lGFRP-2 using 35 S-labelled oligonucleotide probes. None of the nutritional treatments affected the number or size of follicles positive for IGF-IR, but glucose (P < 0.001) and lupin (P < 0.001) treatments reduced the follicular concentration of mRNA. The nutritional treatments all increased the number of follicles positive for IGFBP-2 (P < 0.05) and reduced their mean diameter (P < 0.05) and with the exception of lupin feeding, the concentration of mRNA (P < 0.05). The results show that all treatments affected the intrafollicular IGF system and suggest that IGF-IR and IGFBP-2 are nutritionally regulated in the follicle. However, the effects of treatments were variable and suggest the existence of multiple regulatory mechanisms that allow for normal variation in composition and balance of the ruminant diet MH - Australia MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: BIO SCIENTIFICA LTD RP - NOT IN FILE U3 - TC 4 U4 - Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1470-1626 UR - ISI:000225832700011 L2 - GROWTH-FACTOR-I; LATE LUTEAL-PHASE; OVULATION RATE; ESTROUS-CYCLE; METABOLIC HORMONES; FACTOR SYSTEM; OVINE OVARY; RIBONUCLEIC-ACIDS; SOMATOTROPIC AXIS; GENE-EXPRESSION SO - Reproduction 2004 ;128(6):747-756 11783 UI - 5115 AU - Munoz-Navia M AU - Dorantes-Davila J AU - Pastor GM AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Toulouse 3, UMR 5626 CNRS, Phys Quant Lab, F-31062 Toulouse, FranceDorantes-Davila, J, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, Mexico TI - Calculation of the orbital magnetic moments in fcc 3d-4d binary clusters: Co-Rh and Co-Pd AB - The orbital magnetic moments () and spin moments () of mixed fee CoNPdM and CoNRhM (N, M = 19, 24) clusters are determined by using a self-consistent real-space tight binding method. In all cases considered, amounts to 20%-50% of the total magnetic moment M-z (M-z = 2 + ). Moreover, the M-z are remarkably larger than the M-z(Co) values of the single Co cluster, due mainly to the local spin moments induced at the Pd and Rh atoms, which amount to about 20% of M-z (2(Pd,Rh) = 0.1-0.8 mu(B)) and to a considerable enhancement of the orbital moments at the Co atoms ( = 0.2-1 mu(B)). These results are analysed from a local perspective MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000222194000027 L2 - ANISOTROPY ENERGY; RHODIUM CLUSTERS; ENHANCEMENT; SURFACES; PD(111); METALS; FILMS SO - Journal of Physics-Condensed Matter 2004 ;16(22):S2251-S2256 11784 UI - 5697 AU - Munoz-Rodriguez D AU - Orozco E AU - Vargas C AU - Rodriguez-Cruz JR AU - Donis G AD - ITESM, Ctr Elect & Telecommun, Monterrey 64849, NL, MexicoNortel Networks, Richardson, TX, USAMunoz-Rodriguez, D, ITESM, Ctr Elect & Telecommun, Cetec Torre Sur,PISO 7,Ave E Garza Sada 2501,Col, Monterrey 64849, NL, Mexico TI - System capacity with smart antennas under the presence of angular power spread AB - Smart antennas are a suitable technology to increase the capacity of cellular systems. However, under severe channel conditions, the capacity gain may be small. This work presents a general methodology for the analysis of the effect of the angular power dispersion on the capacity gain for a CDMA system when using smart antennas. System capacity is expressed in terms of a supportable mean number of subscribers per angular sector and it is shown that maximum and mean number of subscribers criteria can be considered equivalent. Formulations for a single cell as well as for multi-tier scenarios are presented. Omni-directional case and non-spread scenarios are shown to be particular cases of the methodology introduced. Capacity is determined for a smart antenna system, both for general antenna beam patterns and general spread characteristics. Copyright (C) 2004 AEI MH - Mexico|Nuevo Leon MH - USA PB - MILAN: ASSOC ELETTROTECNICA ED ELETTRONICA ITALIANA RP - NOT IN FILE U3 - TC 0 U4 - Telecommunications U5 - J;Article AV - English IS - 1120-3862 UR - ISI:000220944200008 L2 - ARRIVAL STATISTICS; CDMA SYSTEM; ANGLE; TIME SO - European Transactions on Telecommunications 2004 ;15(2):145-151 11785 UI - 5686 AU - Munoz-Sandoval E AU - az-Ortiz A AU - Chinchure AD AU - Mydosh JA AD - Inst Potosino Invest Cient & Tecnol, AC, Adv Mat Dept, San Luis Potosi 78231, SLP, MexicoLeiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, NetherlandsMax Planck Inst Chem Phys Solids, D-01187 Dresden, GermanyMunoz-Sandoval, E, Inst Potosino Invest Cient & Tecnol, AC, Adv Mat Dept, Apartado Postal 3-74 Tangamanga, San Luis Potosi 78231, SLP, Mexico TI - Unusual magnetic and transport properties in naturally layered intermetallic compounds R2Ni2Pb (R = Gd, Tb and Y) AB - We studied the magnetic and transport properties of the orthorhombic compounds R2Ni2Pb (R = Gd, Tb and Y) by means of magnetization and magnetoresistivity measurements. These compounds form a new family of naturally layered intermetallics with a magnetic structure that can be tailored by changing the rare-earth element. Our results show a subtle interdependence between the magnetoresistance and the metatnagnetic behavior in these systems. We attribute such anomalous behavior to the layered structure of the compounds, and to the intricacies introduced by the complex magnetic structure of rare earths. First-principles density-functional calculations for the electronic structure of Y2Ni2Pb are presented to support this idea. (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|San Luis Potosi MH - Netherlands PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500064 L2 - magnetic;magnetotransport;rare earth intermetallic compounds;giant magnetoresistance;GIANT MAGNETORESISTANCE; MULTILAYERED STRUCTURES; AB-INITIO; UNIGA; SUPERLATTICES; SM SO - Journal of Alloys and Compounds 2004 ;369(1-2):260-264 11786 UI - 5485 AU - Murgia AR AU - Batista CVF AU - Prestipino G AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoCNR, Ist Biofis, I-16149 Genoa, ItalyPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Ave Univ 2001,Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Amino acid sequence and function of a new alpha-toxin from the Amazonian scorpion Tityus cambridgei AB - A toxic peptide earlier denominated Tc48b [Toxicon 40 (2002) 557] was purified to homogeneity and its ammo acid sequence determined. It has 64 amino acid residues stabilized by four disulfide bridges with a molecular weight of 7,385.2 atomic mass units (a.m.u.). It affects Na+-permeability ill pituitary GH3 cells ill Culture, in a similar fashion as those reported for alpha-scorpion toxins, contrary to most of the New World scorpion toxins that are beta-toxins. (C) 2004 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000221371500013 L2 - amino acid sequence;Na+-channel;patch-clamp;scorpion toxins;Tityus cambridgei;K+-CHANNELS; BRAZILIAN SCORPIONS; VENOM; CELLS SO - Toxicon 2004 ;43(6):737-740 11787 UI - 5187 AU - Murillo-Amador B AU - vila-Serrano NY AU - Garcia-Hernandez JL AU - Lopez-Aguilar R AU - Troyo-Dieguez E AU - Kaya C AD - CIBNOR, La Paz 23090, Baja California, MexicoUniv Autonoma Baja California, La Paz 23080, Baja California, MexicoHarran Univ, Sanliurfa, TurkeyMurillo-Amador, B, CIBNOR, Mar Bermejo 195 Col,Playa Palo Santa Rita, La Paz 23090, Baja California, Mexico TI - Relationship between a nondestructive and an extraction method for measuring chlorophyll contents in cowpea leaves MH - Mexico|Baja California MH - Turkey PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Agronomy;Plant Sciences;Soil Science U5 - J;Article AV - English IS - 1436-8730 UR - ISI:000222121200015 L2 - portable chlorophyll meter;SPAD-502;Vigna unguiculata;LEAF CHLOROPHYLL; GREENNESS SO - Journal of Plant Nutrition and Soil Science-Zeitschrift fur Pflanzenernahrung und Bodenkunde 2004 ;167(3):363-364 11788 UI - 4287 AU - Murillo-Rodriguez E AU - rias-Carrion O AU - Xu M AU - Blanco-Centurion C AU - Drucker-Colin R AU - Shiromani PJ AD - Harvard Med Sch, W Roxbury, MA, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular Biofis & Neurociencias, Mexico City 04510, DF, Mexico TI - Time course of survival of hypocretin neuronal transplants into the pons of adult rats MH - Mexico|Distrito Federal MH - USA PB - WESTCHESTER: AMER ACADEMY SLEEP MEDICINE RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0161-8105 UR - ISI:000223169400541 SO - Sleep 2004 ;27():239-240 11789 UI - 6488 AU - Murillo-Rodriguez E AU - Blanco-Centurion C AU - Gerashchenko D AU - Salin-Pascual RJ AU - Shiromani PJ AD - Brockton W Roxbury Vet Affairs Med Ctr, Dept Neurol, W Roxbury, MA 02132, USAHarvard Univ, Sch Med, W Roxbury, MA 02132, USAUniv Nacl Autonoma Mexico, Fac Med, Dept Physiol, Mexico City, DF, MexicoShiromani, PJ, Brockton W Roxbury Vet Affairs Med Ctr, Dept Neurol, Bldg 3,Room 2C109,1400 VFW Pkwy, W Roxbury, MA 02132 USA TI - The diurnal rhythm of forebrain of young and adenosine levels in the basal old rats AB - There are significant decrements in sleep with age. These include fragmentation of sleep, increased wake time, decrease in the length of sleep bouts, decrease in the amplitude of the diurnal rhythm of sleep, decrease in rapid eye movement sleep and a profound decrease in electroencephalogram Delta power (0.3-4 Hz). Old rats also have less sleep in response to 12 h-prolonged wakefulness (W) indicating a reduction in sleep drive with age. The mechanism contributing to the decline in sleep with aging is not known but cannot be attributed to loss of neurons implicated in sleep since the numbers of neurons in the ventral lateral preoptic area, a region implicated in generating sleep, is similar between young (3.5 months) and old (21.5 months) rats. One possibility for the reduced sleep drive with age is that sleep-wake active neurons may be stimulated less as a result of a decline in endogenous sleep factors. Here, we test this hypothesis by focusing on the purine, adenosine (AD), one such sleep factor that increases after prolonged W. In experiment 1, microdialysis measurements of AD in the basal forebrain at 1 h intervals reveal that old (21.5 months) rats have more extracellular levels of AD compared with young rats across the 24 h diurnal cycle. In experiment 2, old rats kept awake for 6 h (first half of lights-on period) accumulated more AD compared with young rats. If old rats have more AD then why do they sleep less? To investigate whether changes in sensitivity of the AD receptor contribute to the decline in sleep, experiments 3 and 4 determined that for the same concentration of AD or the AD receptor 1 agonist, cyclohexyladenosine, old rats have less sleep compared with young rats. We conclude that even though old rats have more AD, a reduction in the sensitivity of the AD receptor to the ligand does not transduce the AD signal at the same strength as in young rats and may be a contributing factor to the decline in sleep drive in the elderly. (C) 2003 IBRO. Published by Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 26 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000187880500005 L2 - adenosine;sleep;REM sleep;microdialysis;basal forebrain;aging;CENTRAL-NERVOUS-SYSTEM; AGE-DEPENDENT CHANGES; PROLONGED WAKEFULNESS; SLEEP-DEPRIVATION; MOUSE-BRAIN; HIPPOCAMPUS; RECEPTORS; NEURONS; CORTEX; METABOLISM SO - Neuroscience 2004 ;123(2):361-370 11790 UI - 4011 AU - Murphy JB AU - Pisarevsky SA AU - Nance RD AU - Keppie JD AD - St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaUniv Western Australia, Tecton Special Res Ctr, Crawley, WA, AustraliaOhio Univ, Dept Geol Sci, Athens, OH 45701, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoMurphy, JB, St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, Canada TI - Neoproterozoic - Early Paleozoic evolution of peri-Gondwanan terranes: implications for Laurentia-Gondwana connections AB - Neoproterozoic tectonics is dominated by the amalgamation of the supercontinent Rodinia at ca. 1.0 Ga, its breakup at ca. 0.75 Ga, and the collision between East and West Gondwana between 0.6 and 0.5 Ga. The principal stages in this evolution are recorded by terranes along the northern margin of West Gondwana (Amazonia and West Africa), which continuously faced open oceans during the Neoproterozoic. Two types of these so-called peri-Gondwanan terranes were distributed along this margin in the late Neoproterozoic: (1) Avalonian-type terranes (e.g. West Avalonia, East Avalonia, Carolina, Moravia-Silesia, Oaxaquia, Chortis block that originated from ca. 1.3 to 1.0 Ga juvenile crust within the Panthalassa-type ocean surrounding Rodinia and were accreted to the northern Gondwanan margin by 650 Ma, and (2) Cadomian-type terranes (North Armorica, Saxo-Thuringia, Moldanubia, and fringing terranes South Armorica, Ossa Morena and Tepla-Barrandian) formed along the West African margin by recycling ancient (2-3 Ga) West African crust. Subsequently detached from Gondwana, these terranes are now located within the Appalachian, Caledonide and Variscan orogens of North America and western Europe. Inferred relationships between these peri-Gondwanan terranes and the northern Gondwanan margin can be compared with paleomagnetically constrained movements interpreted for the Amazonian and West African cratons for the interval ca. 800-500 Ma. Since Amazonia is paleomagnetically unconstrained during this interval, in most tectonic syntheses its location is inferred from an interpreted connection with Laurentia. Hence, such an analysis has implications for Laurentia-Gondwana connections and for high latitude versus low latitude models for Laurentia in the interval ca. 615-570 Ma. In the high latitude model, Laurentia-Amazonia would have drifted rapidly south during this interval, and subduction along its leading edge would provide a geodynamic explanation for the voluminous magmatism evident in Neoproterozoic terranes, in a manner analogous to the Mesozoic-Cenozoic westward drift of North America and South America and subduction-related magmatism along the eastern margin of the Pacific ocean. On the other hand, if Laurentia-Amazonia remained at low latitudes during this interval, the most likely explanation for late Neoproterozoic peri-Gondwanan magmatism is the re-establishment of subduction zones following terrane accretion at ca. 650 Ma. Available paleomagnetic data for both West and East Avalonia show systematically lower paleolatitudes than predicted by these analyses, implying that more paleomagnetic data are required to document the movement histories of Laurentia, West Gondwana and the peri-Gondwanan terranes, and test the connections between them MH - Australia MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 21 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1437-3254 UR - ISI:000224934600002 L2 - CAPE-BRETON ISLAND; AVALON COMPOSITE TERRANE; SOUTHERN NEW-BRUNSWICK; U-PB GEOCHRONOLOGY; OSSA-MORENA ZONE; PRECAMBRIAN IGNEOUS ROCKS; LAYERED MAFIC INTRUSION; TEPLA-BARRANDIAN UNIT; ND ISOTOPIC EVIDENCE; SW URALS RUSSIA SO - International Journal of Earth Sciences 2004 ;93(5):659-682 11791 UI - 4996 AU - Murphy JB AU - Fernandez-Suarez J AU - Keppie JD AU - Jeffries TE AD - St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaUniv Complutense, Dept Petrol & Geoquim, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoNat Hist Museum, Dept Mineral, London SW7 5BD, EnglandMurphy, JB, St Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, Canada TI - Contiguous rather than discrete Paleozoic histories for the Avalon and Meguma terranes based on detrital zircon data AB - Upper Ordovician-Lower Devonian strata of the Meguma terrane in the Canadian Appalachians contain zircon populations, including an important Mesoproterozoic zircon population (1.0-1.4 Ga), similar to those in coeval strata of Avalonia, and strongly suggest contiguous rather than discrete histories for these terranes throughout the Paleozoic. That these terranes were juxtaposed throughout the early Paleozoic is indicated by the absence of a Cambrian-Ordovician accretionary event, the lack of intervening suture-zone ophiolitic units, and the similarity of Avalonian and Meguma basement Nd isotope signatures in early Paleozoic igneous suites. As Avalonia had accreted to Laurentia-Baltica by the Early Silurian, these data suggest that the Meguma terrane, like Avalonia, resided along the same (northern) margin of the Rheic Ocean at that time. These conclusions have implications for reconstructions of the northern Gondwanan margin in the early Palleozoic and imply that the Silurian-Devonian Acadian orogeny in Maritime Canada occurred in an Andean-type setting and was not related to collision of the Meguma terrane with the Laurentian margin MH - Canada MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 10 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000222490800011 L2 - meguma terrane;avalonia;Appalachian orogen;acadian orogeny;NOVA-SCOTIA; CANADA; PB; CONSTRAINTS; MARGIN; NEWFOUNDLAND; CHRONOLOGY; LAURENTIA; SEQUENCE; GONDWANA SO - Geology 2004 ;32(7):585-588 11792 UI - 4013 AU - Murrieta CR AU - Seibert AF AU - Fair JR AU - Rocha U AD - Univ Regiomontana, Monterrey 64000, Nuevo Leon, MexicoUniv Texas, Separat Res Program, Austin, TX 78712, USARocha-U, JA, Univ Regiomontana, Monterrey 64000, Nuevo Leon, Mexico TI - Liquid-side mass-transfer resistance of structured packings AB - Stripping of oxygen from water using air was performed in four different structured packings. Because the transfer of oxygen to air is easy, the resistance to mass transfer lies on the liquid side. From these experiments, the measured global volumetric mass-transfer coefficient (K(L)a(e)) is equal to the individual mass-transfer coefficient of the liquid phase (k(L)a(e)). The value of the interfacial area a(e) is estimated using a model proposed in 1992, and the individual mass-transfer coefficient of the liquid is deduced and compared to one based on the penetration theory used in the first model proposed for structured packing in distillation columns published in 1985. It was found that the correction factor C-E used to equate both coefficients is close to unity MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0888-5885 UR - ISI:000224666800024 L2 - PERFORMANCE SO - Industrial & Engineering Chemistry Research 2004 ;43(22):7113-7120 11793 UI - 3712 AU - Muzerolle J AU - D'Alessio P AU - Calvet N AU - Hartmann L AD - Univ Arizona, Steward Observ, Tucson, AZ 85721, USAUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAMuzerolle, J, Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA TI - Magnetospheres and disk accretion in herbig Ae/Be stars AB - We present evidence of magnetically mediated disk accretion in Herbig Ae/Be stars. Magnetospheric accretion models of Balmer and sodium profiles calculated with appropriate stellar and rotational parameters are in qualitative agreement with the observed profiles of the Herbig Ae star UX Ori and yield a mass accretion rate of similar to 10(-8) M-. yr(-1). If more recent indications of an extremely large rotation rate for this object are correct, the magnetic field geometry must deviate from that of a standard dipole in order to produce line emission consistent with observed flux levels. Models of the associated accretion shock qualitatively explain the observed distribution of excess fluxes in the Balmer discontinuity for a large ensemble of Herbig Ae/Be stars and imply typically small mass accretion rates, less than or similar to10(-7) M-. yr(-1). In order for accretion to proceed onto the star, significant amounts of gas must exist inside the dust destruction radius, which is potentially problematic for recently advocated scenarios of "puffed'' inner dust wall geometries. However, our models of the inner gas disk show that for the typical accretion rates we have derived, the gas should generally be optically thin, thus allowing direct stellar irradiation of the inner dust edge of the disk MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 30 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225766700028 L2 - accretion, accretion disks;circumstellar matter;stars : emission-line, Be;stars : pre-main-sequence;T-TAURI STARS; BETA-PICTORIS PHENOMENON; UX-ORIONIS; YOUNG OBJECTS; AB-AURIGAE; CIRCUMSTELLAR DISKS; EMISSION-LINES; AE STARS; MODELS; DUST SO - Astrophysical Journal 2004 ;617(1):406-417 11794 UI - 6649 AU - Myers JL AU - Selman M AD - Mayo Clin, Rochester, MN 55905, USAInst Nacl Enfermedades Respiratorias, Mexico City, DF, MexicoMyers, JL, Mayo Clin, Rochester, MN 55905, USA TI - Respiratory epithelium in usual interstitial pneumonia/idiopathic pulmonary fibrosis - Spark or destructive flame? MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 3 U4 - Critical Care Medicine;Respiratory System U5 - J;Editorial Material AV - English IS - 1073-449X UR - ISI:000187570500003 L2 - PATHOGENESIS; PNEUMONIA SO - American Journal of Respiratory and Critical Care Medicine 2004 ;169(1):3-5 11795 UI - 4816 AU - Naghipour A AU - Sabounchei SJ AU - Morales-Morales D AU - Hernandez-Ortega S AU - Jensen CM AD - Univ Hawaii, Dept Chem, Honolulu, HI 96822, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBu Ali Sina Univ, Fac Sci, Dept Chem, Hamadan, IranJensen, CM, Univ Hawaii, Dept Chem, Honolulu, HI 96822, USA TI - Synthesis of a new class of unsymmetrical PCP' pincer ligands and their palladium(II) complexes: X-ray structure determination of PdCl{C6H3-2-CH2PPh2-6-CH2PBu2t} AB - The unsymmetrical PCPt pincer ligands {C6H4-l-CH2PPh2-3-CH2PBu2t} and {C6H4-l-CH2PPh2-3-CH2PPr2i} and the corresponding palladium complexes: PdCl{C6H3-2-CH2PPh2-6-CH2PBu2t} and PdCl{CH3-2-CH2PPh2-6-CHPPr2i} have been synthesized in good yields. The molecular structure of PdCl{C6H3-2-CH2PPh2-6-CH2Bu2t} was determined through a single crystal X-ray diffraction study. The palladium center was found to be located into a slightly distorted square planar environment in which the {C6H4-1-CH2Ph2-3-CH2Bu2t} ligand is coordinated as a tridentate, PCP pincer type chelate. The complex, PdCl{C6H3-2CH(2)PPh(2)-6-CH2PPr2i} catalyzes the Heck coupling of iodobenzene with styrene. (C) 2004 Elsevier B.V. All rights reserved MH - Iran MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000222957100010 L2 - PCP pincer ligand;palladium complexes;heck reaction;catalysis;ASYMMETRIC ALDOL REACTION; CATALYTIC DEHYDROGENATION; METHYL ISOCYANOACETATE; TRIDENTATE LIGAND; CRYSTAL-STRUCTURE; ARYL CHLORIDES; IRIDIUM; PLATINUM; ALKANES SO - Journal of Organometallic Chemistry 2004 ;689(15):2494-2502 11796 UI - 3241 AU - Najera-Vazquez R AU - Dzul F AU - Sabido M AU - Tun-Ku E AU - Manrique-Saide P AD - Secretaria Salud Yucatan, Yucatan, MexicoUniv Automoma Yucatan, Yucatan, MexicoUniv London London Sch Hyg & Trop Med, London WC1E 7HT, EnglandNajera-Vazquez, R, Secretaria Salud Yucatan, Calle 72 463 Col Ctr Merida, Yucatan, Mexico TI - New distribution records of mosquitoes (Diptera : Culicidae) for Yucatan, Mexico AB - As part of the West Nile Virus Emergence Program in Yucatan, carried out by the Mexican Ministry of Health, an extensive mosquito larvae survey was made throughout urban, suburban and rural localities within 66 municipalities of this Mexican State. Larval collections (2623 samples) from domiciliary and peridomiciliary habitats were made from August to December 2003 (rainy season). New municipality distribution records were established for 16 mosquito species. Psorophora howardii was recorded for Yucatan State for the first time. Ae. aegypti was the most widely distributed species, and was recorded in almost all the municipalities sampled, followed by Culex coronator, Cx. nigripalpus, Cx. quinque/asciatus, Cx. interrogator and Cx. thriambus. A wide variety of habitats, natural or manmade, were found positive for mosquitoes, the most common being buckets, rock holes, water storage tanks, and laundry or kitchen items, all of which hosted a large number of different species MH - United Kingdom MH - Mexico|Yucatan PB - PHILADELPHIA: AMER ENTOMOL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0013-872X UR - ISI:000226774200001 L2 - Diptera;Culicidae;Mexico;Yucatan;new distribution records SO - Entomological News 2004 ;115(4):181-190 11797 UI - 5004 AU - Najim K AU - Poznyak AS AU - Ikonen E AD - Univ Oulu, Dept Process & Environm Engn, Syst Engn Lab, FIN-90014 Oulu, FinlandENSIACET, Proc Control Lab, F-31077 Toulouse 4, FranceCINVESTAV, INP, Dept Automat Control, Mexico City 07300, DF, MexicoIkonen, E, Univ Oulu, Dept Process & Environm Engn, Syst Engn Lab, FIN-90014 Oulu, Finland TI - Optimization based on a team of automata with binary outputs AB - This paper presents an algorithm for optimization of a multimodal scalar-argument function based on a team of learning stochastic automata with binary actions (outputs) 0 or 1. The action of the team of automata consists of a digital number which represents the environment input. The probability distribution associated with each automaton is adjusted using a modified version of the Bush-Mosteller reinforcement scheme with a continuous environment response and a time-varying correction factor. The asymptotic properties of this optimization algorithm are presented. An example illustrates the feasibility of this optimization algorithm. (C) 2004 Elsevier Ltd. All rights reserved MH - Finland MH - France MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000222556000006 L2 - asymptotic properties;discretization;genetic algorithms;learning algorithms;random searches;LEARNING AUTOMATA SO - Automatica 2004 ;40(8):1349-1359 11798 UI - 5347 AU - Nakazawa Y AU - Peterson AT AU - Martinez-Meyer E AU - Navarro-Siguenza AG AD - Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USAUniv Kansas, Dept Geog, Lawrence, KS 66045, USAUniv Kansas, Kansas Appl Remote Sensing Program, Lawrence, KS 66045, USAPeterson, AT, Univ Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Apartado 70-399, Mexico City 04510, DF, Mexico TI - Seasonal niches of Nearctic-Neotropical migratory birds: Implications for the evolution of migration MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: AMER ORNITHOLOGISTS UNION RP - NOT IN FILE U3 - TC 3 U4 - Ornithology U5 - J;Editorial Material AV - English IS - 0004-8038 UR - ISI:000221824600033 L2 - GLOBAL CLIMATE-CHANGE; GEOGRAPHIC DISTRIBUTIONS; SPECIES INVASIONS; MODELS; PREDICTION; SPECIMENS; AMERICA; RANGES SO - Auk 2004 ;121(2):610-618 11799 UI - 5513 AU - Nance RD AU - Murphy JB AU - Keppie JD AD - Ohio Univ, Dept Geol Sci, Clippinger Labs 316, Athens, OH 45701, USASt Francis Xavier Univ, Dept Earth Sci, Antigonish, NS B2G 2W5, CanadaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoNance, RD, Ohio Univ, Dept Geol Sci, Clippinger Labs 316, Athens, OH 45701 USA TI - Nick Rast and the recognition of the Avalonian Arc AB - Recognition of the eastern (Avalonian) margin of the northern Appalachian orogen as a Late Precambrian microcontinental arc terrane, rather than the opposing passive margin of the Proto-Atlantic (Iapetus) Ocean to that of eastern Laurentia, constituted a fundamental advance in Appalachian geology that profoundly influenced subsequent models for the orogen's plate tectonic evolution. This advance was first clearly articulated by Nick Rast and his students in 1976, who, by correlating rocks of the Avalon Platform with those of the British Midlands, established the Avalonian volcanic belt as a Japan-like microcontinent. Contrary to contemporary views of the Avalon Platform, which favored an extensional, Basin and Range-like setting for its volcanism, Rast argued on the basis of this correlation that the association of Avalonian volcanism with compressional orogeny, widespread calc-alkaline plutonism and, in Angelsey, with blueschists and ophiolitic rocks, indicated a convergent plate margin setting. Rast further proposed that the Avalonian volcanic belt was ensialic, and was bordered to the northwest and southeast by Precambrian oceanic domains. Contemporary reconstructions of the Avalonian and Cadomian belts as fragments of a Cordilleran-like accretionary orogen that developed along an active margin of Neoproterozoic Gondwana owe their origin to these early ideas and, while far removed from the tectonic model that Rast envisaged, are a direct heritage of his recognition of the Avalonian volcanic belt as a microcontinental are terrane. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Review AV - English IS - 0264-3707 UR - ISI:000221490400007 L2 - SOUTHERN NEW-BRUNSWICK; VOLCANIC ISLAND COMPLEX; PERI-GONDWANAN TERRANES; LATE PRECAMBRIAN ROCKS; U-PB AGES; APPALACHIAN OROGEN; COMPOSITE TERRANE; CADOMIAN BELT; GEOLOGICAL CONSTRAINTS; TECTONIC IMPLICATIONS SO - Journal of Geodynamics 2004 ;37(3-5):437-455 11800 UI - 5238 AU - Nash TE AU - Del Brutto H AU - Butman JA AU - Corona T AU - gado-Escueta A AU - Duron RM AU - Evans CAW AU - Gilman RH AU - Gonzalez AE AU - Loeb JA AU - Medina MT AU - Pietsch-Escueta S AU - Pretell EJ AU - Takayanagui OM AU - Theodore W AU - Tsang VCW AU - Garcia HH AD - NIAID, Parasit Dis Lab, Dept Diagnost Radiol, Ctr Clin,NIH, Bethesda, MD 20892, USANINDS, NIH, Bethesda, MD 20892, USAHosp Clin Kennedy, Dept Neurol Sci, Guayaquil, EcuadorInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoUniv Calif Los Angeles, Los Angeles, CA, USAUniv London Imperial Coll Sci Technol & Med, Dept Infect Dis & Microbiol, London SW7 2AZ, EnglandJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD, USAUniv Peruana Cayetano Heredia, Dept Microbiol, Lima, PeruUniv Nacl Mayor San Marcos, Sch Vet Med, Lima 14, PeruWayne State Univ, Ctr Mol Med & Genet, Detroit, MI, USAWayne State Univ, Dept Neurol, Detroit, MI, USAUniv Nacl Autonoma Honduras, Tegucigalpa, HondurasEpilepsy Fdn Amer, Los Angeles, CA, USAInst Nacl Ciencias Neurol, Cysticercosis Unit, Lima, PeruUniv Sao Paulo, Sch Med Riberao Preto, Dept Neurol, BR-14049 Ribeirao Preto, BrazilCtr Dis Control, Div Parasit Dis, Natl Ctr Infect Dis, Atlanta, GA 30333, USANash, TE, NIAID, Parasit Dis Lab, Dept Diagnost Radiol, Ctr Clin,NIH, Bethesda, MD 20892 USA TI - Calcific neurocysticercosis and epileptogenesis AB - Neurocysticercosis is responsible for increased rates of seizures and epilepsy in endemic regions. The most common form of the disease, chronic calcific neurocysticercosis, is the end result of the host's inflammatory response to the larval cysticercus of Taenia solium. There is increasing evidence indicating that calcific cysticercosis is not clinically inactive but a cause of seizures or focal symptoms in this population. Perilesional edema is at times also present around implicated calcified foci. A better understanding of the natural history, frequency, epidemiology, and pathophysiology of calcific cysticercosis and associated disease manifestations is needed to define its importance, treatment, and prevention MH - Brazil MH - Ecuador MH - United Kingdom MH - Honduras MH - USA MH - Mexico|Distrito Federal MH - Peru PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 20 U4 - Clinical Neurology U5 - J;Review AV - English IS - 0028-3878 UR - ISI:000221890400006 L2 - RURAL GUATEMALAN COMMUNITIES; PARTIAL STATUS EPILEPTICUS; TAENIA-SOLIUM TAENIASIS; CT LESIONS; PERILESIONAL GLIOSIS; COMPUTED-TOMOGRAPHY; PARTIAL SEIZURES; INDIAN PATIENTS; EPILEPSY; CYSTICERCOSIS SO - Neurology 2004 ;62(11):1934-1938 11801 UI - 4369 AU - Nava-Ocampo AA AU - arcon-Almanza JM AU - Moyao-Garcia D AU - Ramirez-Mora JC AU - Salmeron J AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anaesthesia & Resp Therapy, Mexico City 06720, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaHosp Gen Reg No 1, IMSS, Epidemiol & Hlth Serv Res Unit, Cuernavaca, Morelos, MexicoNava-Ocampo, AA, Hosp Infantil Mexico Dr Federico Gomez, Dept Anaesthesia & Resp Therapy, Dr Marquez No 162, Mexico City 06720, DF, Mexico TI - Halothane, isoflurane and sevoflurane in pediatric anesthesia: can we decrease costs without increasing adverse events? MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Anesthesiology;Pediatrics U5 - J;Letter AV - English IS - 1155-5645 UR - ISI:000224042500019 SO - Pediatric Anesthesia 2004 ;14(10):891-892 11802 UI - 4577 AU - Nava-Ocampo AA AU - Yelazquez-Armenta Y AU - Brien JF AU - Koren G AD - Hosp Sick Children, Motherrisk Program, Toronto, ON, CanadaHosp Infantil Mexico Dr Federico Gomez, Dept Clin Pharmacol, Mexico City, DF, MexicoQueens Univ, Dept Pharmacol & Toxicol, Kingston, ON K7L 3N6, Canada TI - Pharmacokinetics of ethanol in pregnant women may explain variations in fetal alcohol syndrome MH - Canada MH - Mexico|Distrito Federal PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591101600 SO - Pediatric Research 2004 ;55(4):273A-273A 11803 UI - 5363 AU - Nava-Ocampo AA AU - Velazquez-Armenta Y AU - Brien JF AU - Koren G AD - Hosp Sick Children, Motherisk Program, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaHosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp, Mexico City, DF, MexicoHosp Infantil Mexico Dr Federico Gomez, Dept Clin Pharmacol, Mexico City, DF, MexicoQueens Univ, Fac Hlth Sci, Dept Pharmacol & Toxicol, Kingston, ON, CanadaNava-Ocampo, AA, Hosp Sick Children, Motherisk Program, Div Clin Pharmacol & Toxicol, 555 Univ Ave, Toronto, ON M5G 1X8, Canada TI - Elimination kinetics of ethanol in pregnant women AB - To evaluate the pharmacokinetics of ethanol in the early second trimester of pregnancy, ethanol concentrations simultaneously measured in the maternal blood (EtOH-MB) and in the amniotic fluid (EtOH-AF) of six pregnant women were obtained from a previous study in which a single ethanol dose of 300 mg kg(-1) body weight was administered orally. For maternal blood ethanol concentration, the kinetic equation was: dC(EtOH-MB)/dt = - ( k(12) + V-max EtOH/ KmEtOH + CEtOH-MB) x CEtOH-MB + (k(21)+CEtOH-AF) where k(12) and k(21) are, respectively, the rate constant of ethanol transfer from either the central compartment to the peripheral compartment or vice versa; V-maxEtOH is the maximal velocity for ethanol oxidation; and K-mEtOH is the concentration at which half of the maximal rate of ethanol elimination is reached. The maximum concentration of EtOH in AF was 60% lower than in MB (P = 0.036). However, the AUC(0-3.5h) in AF was only 16% lower than the value for MB (P = 0.059). The k(12) (0.20 +/- 0.26h(-1)) was almost twice faster than k(21) (0.13 +/- 0.20 h(-1)). The V-maxEtOH was 237.6 +/- 71.5 mug ml(-1) h(-1) and K-mEtOH was 3.7 +/- 4.7 mug ml(-1). Our results imply that in the early second trimester, ethanol metabolism is fast. However, ethanol clearance from the AF is slower than ethanol clearance in MB. This process is widely variable, and our findings may partially explain the wide variability of ethanol's toxic effects on the fetus. (C) 2004 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Reproductive Biology;Toxicology U5 - J;Article AV - English IS - 0890-6238 UR - ISI:000221681300009 L2 - ethanol pharmacokinetics;theoretical models;transplacental exposure;AMNIOTIC-FLUID; ALCOHOL METABOLISM; ACETALDEHYDE; OXIDATION; LIVER; BLOOD SO - Reproductive Toxicology 2004 ;18(4):613-617 11804 UI - 6220 AU - Nava-Ocampo AA AU - arcon-Almanza JM AU - Moyao-Garcia D AU - Ramirez-Mora JC AU - Salmeron J AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaIMSS, Hosp Gen Reg 1, Epidemiol & Hlth Serv Res Unit, Cuernavaca, Morelos, MexicoNava-Ocampo, AA, Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City, DF, Mexico TI - Undocumented drug utilization and drug waste increase costs of pediatric anesthesia care AB - The present study was performed in order to identify the cost of drugs used without documenting them in the patients' file and the wastage of drugs in a pediatric anesthesiology ward. In a prospective, blinded, observational design, drug utilization of 610 consecutive patients, undergoing an elective or emergency surgical procedure was evaluated. The number of undocumented drugs per 100 requested units and the number of wasted drugs per 100 requested units were computed and multiplied by its corresponding unitary cost. The median undocumented cost was US$92.4 (95% Cl $17.2-$216.6) per 100 requested units. Succinylcholine (40 mg/2 mL) was the main undocumented drug; its use was not documented in approximately 50% cases in which this neuromuscular blocking agent was requested. However, rocuronium and nalbuphine had the highest unjustified cost, $770.6 and $847.0 per 100 requested units, respectively. Ketorolac, diclofenac, metamizol, furosemide, methylprednisolone, sodium bicarbonate, and cisatracurium were requested and documented. The median cost of wasted drug was $141.8 (95% CI $55.8-$448.2) per 100 requested drugs. More than 80% of adrenaline, naloxone, flunitrazepam, ephedrine, and cisatracurium were wasted. However, the highest cost of wasted drugs was for ondansetron, cisatracurium, methylprednisolone, and rocuronium. The uncontrolled availability and use of drugs may represent an important amount of resources wasted without any awareness of the staff in a department of pediatric anesthesia MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0767-3981 UR - ISI:000188963800014 L2 - health care quality assurance;hospital pharmacy service;management audit;IMPACT SO - Fundamental & Clinical Pharmacology 2004 ;18(1):107-112 11805 UI - 6349 AU - Nava-Ocampo AA AU - Bello-Ramirez AM AD - Hosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaHosp Infantil Mexico Dr Federico Gomez, Dept Anaesthesia & Resp Therapy, Mexico City, DF, MexicoUniv Toronto, Leslie Dan Fac Pharm, Toronto, ON, CanadaNava-Ocampo, AA, Hosp Sick Children, Div Clin Pharmacol & Toxicol, 555 Univ Ave, Toronto, ON M5G 1X8, Canada TI - Lipophilicity affects the pharmacokinetics and toxicity of local anaesthetic agents administered by caudal block AB - 1. Drugs administered into the epidural space by caudal block are cleared by means of a process potentially affected by the lipophilic character of the compounds. 2. In the present study, we examined the relationship between the octanol-water partition coefficient (log P-oct) and the time to reach the maximum plasma drug concentration (t(max)) of lignocaine, bupivacaine and ropivacaine administered by caudal block in paediatric patients. We also examined the relationship between log P-oct and the toxicity of these local anaesthetic agents in experimental models. The t(max) and toxicity data were obtained from the literature. 3. Ropivacaine, with a log P-oct of 2.9, exhibited a t(max) of 61.6 min. The t(max) of lignocaine, with a log P-oct of 2.4, and bupivacaine, with a log P-oct of with 3.4, were approximately 50% shorter than ropivacaine. At log P-oct of approximately 3.0, the toxicity of these local anaesthetic agents was substantially increased. The relationship between log P-oct and the convulsive effect in dogs was similar to the relationship between log P-oct and the lethal dose in sheep. 4. With local anaesthetic agents, it appears that the relationship between log P-oct and drug transfer from the epidural space to the blood stream is parabolic, being the slowest rate of transference at log P-oct 3.0. Toxicity, due to plasma availability of these local anaesthetic agents, seems to be increased at log P-oct equal or higher than 3.0 secondary to the highest transfer from plasma into the central nervous system MH - Canada MH - Mexico|Distrito Federal PB - CARLTON: BLACKWELL PUBLISHING ASIA RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy;Physiology U5 - J;Article AV - English IS - 0305-1870 UR - ISI:000188721600020 L2 - drug toxicity;pharmacokinetics;structure-activity relationship;tissue distribution;CENTRAL-NERVOUS-SYSTEM; BUPIVACAINE 0.25-PERCENT; ROPIVACAINE; ML-CENTER-DOT-KG(-1); LIDOCAINE; MORPHINE; CHILDREN; SURGERY; SHEEP; QSAR SO - Clinical and Experimental Pharmacology and Physiology 2004 ;31(1-2):116-118 11806 UI - 4943 AU - Navabi A AU - Singh RP AU - Tewari JP AU - Briggs KG AD - Univ Alberta, Dept Agr Food & Nutrit Sci, Agr Forestr Ctr 410, Edmonton, AB T6G 2P5, CanadaCIMMYT, Mexico City 06600, DF, MexicoTewari, JP, Univ Alberta, Dept Agr Food & Nutrit Sci, Agr Forestr Ctr 410, Edmonton, AB T6G 2P5, Canada TI - Inheritance of high levels of adult-plant resistance to stripe rust in five spring wheat genotypes AB - Inheritance of adult-plant resistance to stripe rust (caused by Puccinia striiformis Westend. E sp. tritici) in five spring wheats (Triticum aestivum L. em. Thell) following inoculation with the Mexican race Mex96-11 was studied. All possible crosses among these resistant genotypes and a susceptible genotype, 'Avocet-YrA', were made in a one-way diallel mating design. F-1 crosses, F-2 populations, and F-2:F-3 and F-5 single seed-descent lines were evaluated under artificial field epidemics initiated with race Mex96-11. The adult-plant resistance in crosses of resistant parent with Avocet-YrA tended to be incompletely dominant and was based on the interaction of gene Yr18 and at least three additional additive genes in each parent. Transgressive segregation was detected in all F-2 populations and F-5 single seed-descent lines of the resistant parent inter-crosses, indicating that some additive genes were nonallelic. Combining ability analyses indicated that additive gene effects were more important than nonadditive gene effects in the inheritance of adult plant resistance to stripe rust in the evaluated material. Estimates of narrow-sense heritability ranged from 0.88 to 0.96. Stripe rust resistance in these wheats is expected to be durable MH - Canada MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 8 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000222582400005 L2 - PUCCINIA-STRIIFORMIS; DIALLEL ANALYSIS; HIGH-TEMPERATURE; YELLOW RUST; LEAF RUST; TRANSGRESSIVE SEGREGATION; SEEDLING RESISTANCE; CULTIVARS; NUMBER; HERITABILITY SO - Crop Science 2004 ;44(4):1156-1162 11807 UI - 4391 AU - Navar J AU - Mendez E AU - Najera A AU - Graciano J AU - Dale V AU - Parresol B AD - UANL, Fac Ciencias Forestales, Leon 67700, MexicoInst Tecnol Forestal, Durango, MexicoOak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831, USAUSDA, Forest Serv, So Res Stn, Asheville, NC, USANavar, J, UANL, Fac Ciencias Forestales, Km 145,Carretera Nacl Linares Cd Victoria,Linares, Leon 67700, Mexico TI - Biomass equations for shrub species of Tamaulipan thornscrub of North-eastern Mexico AB - Nine additive allometric equations for computing above-ground, standing biomass were developed for the plant community and for each of 18 single species typical of the Tamaulipan thornscrub of north-eastern Mexico. Equations developed using additive procedures in seemingly unrelated linear regression provided statistical efficiency in total biomass estimates at the scales of both individual species and at the plant community. A single equation for each species improves efficiency in biomass estimates by 12.5% in contrast to using a single equation for the plant community. Therefore, additive equations developed in seemingly unrelated linear regression of parameter estimation are recommended to compute biomass components and total biomass for the species described. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Durango MH - Mexico|Guanajuato MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000223910000002 L2 - above-ground biomass components;additive least-squares techniques;arid;semi-arid and subtropical shrub species;FOREST INVENTORY DATA; FORCING ADDITIVITY; UNITED-STATES; BIG SAGEBRUSH; TABLES; TREES; REGION; STANDS; MODEL; FUEL SO - Journal of Arid Environments 2004 ;59(4):657-674 11808 UI - 5389 AU - Navarro-Garcia F AU - Canizalez-Roman A AU - Sui BQ AU - Nataro JP AU - Azamar Y AD - Inst Politecn Nacl, CINVESTAV, Dept Cell Biol, Mexico City 07000, DF, MexicoUniv Maryland, Sch Med, Ctr Vaccine Dev, Baltimore, MD 21201, USANavarro-Garcia, F, Inst Politecn Nacl, CINVESTAV, Dept Cell Biol, Ap Postal 14-740, Mexico City 07000, DF, Mexico TI - The serine protease motif of EspC from enteropathogenic Escherichia coli produces epithelial damage by a mechanism different from that of pet toxin from enteroaggregative E-coli AB - EspC (Escherichia coli secreted protein C) of enteropathogenic E. coli (EPEC) shows the three classical domains of the autotransporter proteins and has a conserved serine protease motif belonging to the SPATE (serine protease autotransporters of Enterobacteriaceae) subfamily. EspC and its homolog Pet in enteroaggregative E. coli (EAEC) bear the same sequence within the serine protease motif, and both proteins produce enterotoxic effects, suggesting that like Pet, EspC could be internalized to reach and cleave the calmodulin-binding domain of fodrin, causing actin cytoskeleton disruption. Even though both proteins cause cytoskeleton damage by virtue of their serine protease motifs, the following evidence supports the hypothesis that the mechanisms are different. (i) To obtain similar cytotoxic and cytoskeletal effects, a threefold-higher EspC concentration and a twofold-higher exposure time are needed. (ii) EspC internalization into epithelial cells takes more time (6 h) than Pet internalization (30 min), and the distributions of the two proteins inside the cells are also different. (iii) Both proteins have affinity for fodrin and cleave it, but the cleavage sites are different; EspC produces two cleavages, while Pet produces just one. (iv) EspC does not cause fodrin redistribution within epithelial cells. (v) An EspC serine protease motif mutant, but not a Pet serine protease mutant, competes with EspC by blocking cytoskeletal damage. All these data suggest that the protein conformational structure is very important for the activity of the catalytic site, influencing its interaction with the target protein and its internalization. The differences between these proteins may explain the reduced ability of EspC to cause cytopathic effects. However, these differences may confer a specialized role on EspC in the pathogenesis of EPEC, which is different from that of Pet in EAEC pathogenesis MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000221662400063 L2 - PATHOGENICITY ISLAND; EFFACING ACTIVITIES; CELLS; ENTEROTOXIN; PROTEINS; SECRETION; CALPAIN; SIGNALS; PLASMID; ENCODES SO - Infection and Immunity 2004 ;72(6):3609-3621 11809 UI - 3983 AU - Navarro-Gonzalez R AU - Rainey FA AU - Mckay CP AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Mexico City 04510, DF, MexicoLouisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803, USANASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035, USANavarro-Gonzalez, R, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Lab Quim Plasmas & Estudios Planetarios, Circuito Exterior,Ciudad Univ,Apartado Postal 70-, Mexico City 04510, DF, Mexico TI - Microbial life in the Atacama Desert - Response MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000225301600019 SO - Science 2004 ;306(5700):1289-1290 11810 UI - 5005 AU - Navarro-Lopez EM AU - Fossas-Colet E AD - Inst Mexicano Petr, Program Invest Matemat Aplicadas & Computac, Mexico City 07300, DF, MexicoUniv Politecn Catalunya, Inst Organ & Control, E-08028 Barcelona, SpainNavarro-Lopez, EM, Inst Mexicano Petr, Program Invest Matemat Aplicadas & Computac, Eje Cent Lazaro Cardenas,152 Ed 2,Planta Cub 1,AP, Mexico City 07300, DF, Mexico TI - Feedback passivity of nonlinear discrete-time systems with direct input-output link AB - This paper is devoted to the study of the feedback passivity property in nonlinear discrete-time systems. The relative degree and zero dynamics of the non-passive system are related to the feedback passivity of the system. Two main results are presented. First, some relative degree-related properties of passive systems in general form are stated. Second, sufficient conditions in order to render a multiple-input multiple-output (MIMO) system passive by means of a static state feedback control law are obtained. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0005-1098 UR - ISI:000222556000014 L2 - discrete-time systems;nonlinear systems;energy control;passive elements;feedback passive systems;DISSIPATIVE DYNAMICAL-SYSTEMS; GLOBAL STABILIZATION; EQUIVALENCE SO - Automatica 2004 ;40(8):1423-1428 11811 UI - 4265 AU - Navarro-Olache LF AU - Lavin MF AU - varez-Sanchez LG AU - Zirino A AD - UABC, Inst Invest Oceanolg, Ensenada, Baja California, MexicoCICESE, Dept Oceanog Fis, Ensenada, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USANavarro-Olache, LF, UABC, Inst Invest Oceanolg, Ensenada, Baja California, Mexico TI - Internal structure of SST features in the central Gulf of California AB - Closely spaced XBT and CTD data were used to study the sub-surface structure of features observed in satellite AVHRR sea-surface temperature (SST) images of the Gulf of California (GC), such as fronts, jets and gyres. The lowest SSTs in the GC are found around the midriff islands, and especially over the sills, because of strong mixing from tidal currents and breaking internal waves. This minimum SST area is limited to the south and north by sharp SST fronts, which frequently show convolutions, gyres, and filaments. A vertical section of temperature along the Gulf length shows that about 300 km south of the sills, the isotherms begin to spread out in the vertical, reducing stratification. The thermocline isotherms begin surfacing about 100 km south of the sill, forming the SST minimum area, which has a maximum temperature difference of similar to6 degreesC with waters to the south and a horizontal SST gradient of similar to0.05 degreesC km(-1). The evolution and subsurface structure of a cool filament, apparently originated as an instability of the SST front, was intensely sampled. Satellite images show that its head advanced due south at about 0.5 ms(-1), along the edge of a pool of warm surface water about 110 km in diameter. The thermocline below the warm pool was raised at its edge, and some isotherms reached the surface, producing the cool filament. The tilt of the temperature, salinity and density isolines at the edge of the warm pool produced a geostrophic jet, adjacent to the cool filament and just inside the warm pool, with maximum speed similar to0.5 ms(-1) and extending down to similar to80 m. The filament lasted about 10 days, its width was similar to30 km and it reached a maximum length of similar to120 km. The volume transport of the jet in the top 100 m was around 0.7 Sv. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700013 L2 - SST fronts;cool filaments;Gulf of California;SEA-SURFACE TEMPERATURE; COLOR SCANNER IMAGERY; NORTHERN GULF; SPATIAL VARIABILITY; UPPER OCEAN; HEAT-FLUX; CIRCULATION; ZONE; PHYTOPLANKTON; EVOLUTION SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):673-687 11812 UI - 3059 AU - Navarro C AU - Lopez E AU - Stone BA AU - Marrs RP AD - Ginecol & Reprod Humana, Mexico City, DF, MexicoCalif Fertil Partners, Los Angeles, CA, USA TI - Short co-incubation of sperm with oocytes is associated with an increased incidence of polyspermy in human in vitro fertilization (IVF) MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000224010800860 SO - Fertility and Sterility 2004 ;82():S325-S325 11813 UI - 3854 AU - Navarro PC AU - Padilla RP AD - Hosp Univ Dr Negrin, Serv Neumol, Gran Canaria, SpainInst Nacl Enfermedades Resp, Mexico City, DF, MexicoNavarro, PC, Barranco Ballena S-N, Gran Canaria 35020, Spain TI - Chronic obstructive pulmonary disease: An ambiguous name and an obstacle in the campaign against smoking MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: EDICIONES DOYMA S/L RP - NOT IN FILE U3 - TC 1 U4 - Respiratory System U5 - J;Editorial Material AV - Spanish IS - 0300-2896 UR - ISI:000225236000001 L2 - HIGH-RESOLUTION CT; AIRWAY DISEASE; EMPHYSEMA; COPD; DIAGNOSIS; SMOKERS; ASTHMA; LUNG SO - Archivos de Bronconeumologia 2004 ;40(11):477-479 11814 UI - 5085 AU - Navas-Acien A AU - Selvin E AU - Sharrett AR AU - Calderon-Aranda E AU - Silbergeld E AU - Guallar E AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD, USAJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Environm Hlth Sci, Baltimore, MD, USACINVESTAV, Secc Toxicol, Mexico City 14000, DF, MexicoGuallar, E, Johns Hopkins Med Inst, Welch Ctr Prevent Epidemiol & Clin Res, 2024 E Monument St,Suite 2-639, Baltimore, MD 21205 USA TI - Lead, cadmium, smoking, and increased risk of peripheral arterial disease AB - Background-Lead and cadmium exposure may promote atherosclerosis, although the cardiovascular effects of chronic low-dose exposure are largely unknown. The objective of the present study was to evaluate the association between blood levels of lead and cadmium and peripheral arterial disease. Methods and Results-We analyzed data from 2125 participants who were greater than or equal to40 years of age in the 1999 to 2000 National Health and Nutrition Examination Survey ( NHANES). Peripheral arterial disease was defined as an ankle brachial index <0.9 in at least 1 leg. Lead and cadmium levels were measured by atomic absorption spectrometry. After adjustment for demographic and cardiovascular risk factors, the ORs of peripheral arterial disease comparing quartiles 2 to 4 of lead with the lowest quartile were 1.63 (95% CI, 0.51 to 5.15), 1.92 (95% CI, 0.62 to 9.47), and 2.88 (95% CI, 0.87 to 9.47), respectively (P for trend = 0.02). The corresponding ORs for cadmium were 1.07 (95% CI, 0.44 to 2.60), 1.30 (95% CI, 0.69 to 2.44), and 2.82 (95% CI, 1.36 to 5.85), respectively (P for trend = 0.01). The OR of peripheral arterial disease for current smokers compared with never smokers was 4.13. Adjustment for lead reduced this OR to 3.38, and adjustment for cadmium reduced it to 1.84. Conclusions-Blood lead and cadmium, at levels well below current safety standards, were associated with an increased prevalence of peripheral arterial disease in the general US population. Cadmium may partially mediate the effect of smoking on peripheral arterial disease MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 42 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0009-7322 UR - ISI:000222326300023 L2 - cadmium;lead;peripheral vascular diseases;smoking;BLOOD LEAD; LIPID-PEROXIDATION; ATHEROSCLEROSIS; HEART; EXPOSURE; HYPERTENSION; ASSOCIATION; POPULATION; CIGARETTE; PRESSURE SO - Circulation 2004 ;109(25):3196-3201 11815 UI - 6142 AU - ndrade-Cetto A AU - Wiedenfeld H AD - Univ Nacl Autonoma Mexico, Dept Biol Celular, Fac Ciencias, Sch Sci Mexico, Mexico City 04510, DF, MexicoUniv Bonn, Inst Pharmaceut, D-53121 Bonn, GermanyAndrade-Cetto, A, Univ Nacl Autonoma Mexico, Dept Biol Celular, Fac Ciencias, Sch Sci Mexico, Apartado Postal 70-359, Mexico City 04510, DF, Mexico TI - Hypoglycemic effect of Acosmium panamense bark on streptozotocin diabetic rats AB - The hypoglycemic effects of water and butanolic extracts prepared from the bark of Acosmium panamense (Fabaceae) were studied in diabetic rats (streptozotocin (STZ)-induced). Oral application of water extracts at doses of 20 and 200 mg/kg and of butanol extracts at doses of 20 and 100 mg/kg significantly lowered the plasma glucose levels in diabetic rats within 3 h. Glibenclamide was used as reference and showed similar hypoglycemic effect like the extracts. Three structurally new compounds were isolated from the plant and shown to be the main constituents in both extracts. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - Germany MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences;Chemistry, Medicinal;Integrative & Complementary Medicine;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-8741 UR - ISI:000189112700005 L2 - Acosmium panamense;hypoglycemic effect;streptozotocin-induced diabetes;ALKALOIDS SO - Journal of Ethnopharmacology 2004 ;90(2-3):217-220 11816 UI - 1898 AU - ndrade-Montemayor H AU - Hernandez F AU - Madrid J AU - Megias MD AD - Vet Univ Autonomus Queretaro, Fac Nat Sci, Queretaro 76010, MexicoUniv Murcia, Dept Anim Prod, E-30071 Murcia, SpainAndrade-Montemayor, H, Vet Univ Autonomus Queretaro, Fac Nat Sci, Edificio Octavio S Mondragon, Queretaro 76010, Mexico TI - Comparison of different models to estimate purine bases absorbed in goats AB - The purine bases absorbed (PBa) and microbial nitrogen flow (MNF) in the duodenum were estimated with five models proposed for sheep (1, 4), goats (2), cattle (5) and a goat-sheep mixed model (3). Data of purine derivatives excreted (PDe) in urine of eight digestibility trials were used. In these trials, eight adult male castrated Murciano-granadino goats (30.5 +/- 4.95 kg of live weight) were used. Feed was offered as a total mixed ration and was based on alfalfa bay or barley straw and concentrates (50:50). The range in variation for daily DM intake, OM digestibility and nitrogen balance of the different rations were: 38 to 42 g/kg LW0.75, 68 to 71% and 0.35 to -0.11 g/d respectively. The estimation to PBa, MNF and microbial yield, were different between equations. The estimation of PBa in equation 4 was underestimated by too high recovery of endogenous fraction of PDe in urine considered in this equation. The ratio between N content in the microbial population of the rumen (MNR) and PBa was lower in the equation 2 (0.55 mmol/day) than equations 1, 3, 4 and 5 (0.727 mmol/day). The variability of the factors used in the equations to estimate PDa and MNF within and among species limits its use MH - Mexico|Queretaro MH - Spain PB - HATFIELD: SOUTH AFRICAN JOURNAL OF ANIMAL SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0375-1589 UR - ISI:000229975000010 L2 - endogenous purine derivative;digestible organic matter intake;microbial nitrogen synthesis;purine metabolism;URINARY-EXCRETION; METABOLISM; NITROGEN; KIDS SO - South African Journal of Animal Science 2004 ;34():28-30 11817 UI - 4497 AU - ndrade-Sanchez P AU - Upadhyaya SK AU - guera-Vega J AU - Jenkins BM AD - Univ Calif Davis, Dept Biol & Agr Engn, Davis, CA 95616, USAINIFAP, Mexico City, DF, MexicoUniv Cordoba, Dept Ingn Rural, Cordoba, SpainUpadhyaya, SK, Univ Calif Davis, Dept Biol & Agr Engn, 1 Shields Ave, Davis, CA 95616 USA TI - Evaluation of a capacitance-based soil moisture sensor for real-time applications AB - A low resonant frequency, dielectric-based soil moisture sensor developed by Retrokool, Inc. (Berkeley, Cal.) was slightly modified and tested under static laboratory conditions using soil from three different series (Capay silty clay, Yolo loam, and Metz Variant fine sandy loam) of contrasting textural composition. The sensor response consisting of frequency and amplitude measurements was recorded over a range of volumetric moisture contents and salinity levels. The results indicated that the sensor was insensitive to changes in soil texture. The modification to the sensing circuit improved the moisture detection range for the sensor However, the sensor response was influenced by changes in soil salinity. Empirical analyses showed that a normalized sensor output was highly correlated with the soil conductance. Under laboratory conditions, these estimated conductance values correlated well with soil moisture content (r(2) = 0.87). When this sensor was vehicle-mounted behind a tillage tool and tested under field conditions in a Yolo loam soil, estimated conductance values were well correlated with measured soil moisture content (r(2) = 0.78). The results suggest the sensor has good potential for routine applications in real-time measurement of soil moisture for precision agriculture applications MH - USA MH - Mexico|Distrito Federal MH - Spain PB - ST JOSEPH: AMER SOC AGRICULTURAL ENGINEERS RP - NOT IN FILE U3 - TC 0 U4 - Agricultural Engineering U5 - J;Article AV - English IS - 0001-2351 UR - ISI:000223573300035 L2 - moisture sensor;precision agriculture;resonant circuit;soil moisture;tillage;WATER CONTENT; CONDUCTIVITY SO - Transactions of the Asae 2004 ;47(4):1281-1287 11818 UI - 6474 AU - Nelson KL AU - Cisneros BJ AU - Tchobanoglous G AU - Darby JL AD - Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720, USANatl Autonomous Univ Mexico, Inst Engn, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616, USANelson, KL, Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA TI - Sludge accumulation, characteristics, and pathogen inactivation in four primary waste stabilization ponds in central Mexico AB - To support the development of safe and feasible sludge management strategies, the accumulation rates of sludge and its characteristics were studied in four primary wastewater stabilization ponds (WSPs) in central Mexico (three facultative and one anaerobic). The accumulation rates and distribution of sludge were determined by measuring the thickness of the sludge layer at 8-40 locations throughout each pond. The average, per capita sludge accumulation rates ranged from 0.021 to 0.036 m(3)/person/yr. In the anaerobic pond the sludge distribution was uniform throughout the pond, whereas in the three facultative ponds most of the sludge accumulated directly in front of the inlet. To measure the horizontal and vertical variation in the sludge characteristics, sludge cores were collected from 3 to 7 locations in three of the ponds. Each core was divided into 4 sub-samples in which various physical, chemical, and microbiological parameters were measured. In addition, the inactivation of several pathogen indicator organisms was studied in a batch of sludge for 7 months. Based on the microbiological results, it is concluded that reasonable estimates of the inactivation of fecal coliform. bacteria, fecal enterococci, F + coliphage, somatic coliphage, and Ascaris eggs in WSP sludge in central Mexico can be made using first-order rate constants of 0.1, 0.1, 0.01, 0.001, and 0.001 d(-1), respectively. From the observed changes in the concentrations of total solids and the volatile to fixed solids ratio, empirical equations were developed to describe anaerobic degradation and compression, which are the two most important processes affecting the volume of sludge after its deposition. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0043-1354 UR - ISI:000187881200013 L2 - waste stabilization pond;wastewater stabilization pond;sludge accumulation rate;sludge distribution;biosolids;pathogens;ASCARIS EGGS; BACTERIOPHAGES; VIRUSES SO - Water Research 2004 ;38(1):111-127 11819 UI - 5875 AU - Nemeth J AU - Rodriguez-Gattorno G AU - Diaz D AU - Vazquez-Olmos AR AU - Dekany I AD - Univ Szeged, Dept Colloid CHem, H-6720 Szeged, HungaryNatl Autonomous Univ Mexico, Dept Chem, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Ctr Appl Sci & Technol Dev, Mexico City 04510, DF, MexicoHungarian Acad Sci, Nanostruct Mat Res Grp, H-6720 Szeged, HungaryDekany, I, Univ Szeged, Dept Colloid CHem, H-6720 Szeged, Hungary TI - Synthesis of ZnO nanoparticles on a clay mineral surface in dimethyl sulfoxide medium AB - Nanocrystalline ZnO particles have been prepared with different methods using zinc cyclohexanebutyrate as precursor in dimethyl sulfoxide (DMSO) medium via alkaline hydrolysis. A series of preparations were carried out in the presence of layered silicates (kaolinite and montmorillonite). It was revealed by different measurement techniques that the presence of the clay minerals has a stabilization influence on the size of the ZnO nanocrystals. UV-vis absorption spectra show a blue shift when the nanoparticles are prepared in the presence of the clay minerals. The average particle diameters calculated from the Brus equation ranged from 2.6 to 13.0 nm. The UV-vis spectra of the synthesized nanoparticles did not show any red shift after 2-3 days, demonstrating that stable ZnO nanocrystals are present in the dispersions. The presence of the ZnO nanoparticles was also proven by fluorescence measurements. A number of the nanoparticles are incorporated into the interlamellar space of the clays, and an intercalated structure is formed as proven by X-ray diffraction (XRD) measurements. The size of the nanoparticles in the interlamellar space is in the range of 1-2 nm according to the XRD patterns. Transmission electron microscopy and high-resolution transmission electron microscopy investigations were applied to determine directly the particle size and the size distribution of the nanoparticles MH - Hungary MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000220436500052 L2 - ZINC-OXIDE; THIN-FILMS; PARTICLES; DECOMPOSITION; CRYSTALLITES; ELECTRODES; DEPOSITION; MECHANISM; KAOLINITE; PRESSURE SO - Langmuir 2004 ;20(7):2855-2860 11820 UI - 5457 AU - Neufeld L AU - Garcia A AU - Garcia R AU - Villalpando S AU - Martorell R AU - Rivera J AU - Ramakrishnan U AD - Natl Inst Publ Hlth, Cuernavaca 62508, Morelos, MexicoEmory Univ, Rollins Sch Publ Hlth, Atlanta, GA 30322, USA TI - Effects of multiple micronutrient supplements on iron status and anemia prevalence: A randomized controlled trial in semi-rural Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470700412 SO - Faseb Journal 2004 ;18(5):A844-A844 11821 UI - 5909 AU - Neufeld LM AU - Haas JD AU - Grajeda R AU - Martorell R AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoCornell Univ, Div Nutr Sci, Ithaca, NY 14853, USAInst Nutr Cent Amer & Panama, Guatemala City, GuatemalaEmory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322, USANeufeld, LM, Inst Nacl Salud Publ, Ave Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Changes in maternal weight from the first to second trimester of pregnancy are associated with fetal growth and infant length at birth AB - Background: Despite our knowledge of the negative consequences of stunting during early childhood and the important role that maternal nutritional status plays in the development of intrauterine growth retardation, we do not know the extent to which maternal nutritional status influences the growth in length of the fetus or whether a sensitive period for fetal linear growth exists during gestation. Objective: Our objective was to explore the relation between maternal weight gain during different stages of pregnancy and linear growth of the fetus. Design: Ultrasound examinations were conducted at 15-24 (x) over bar: 17.5) and 28-32 ((x) over bar: 29.9) wk of gestation in 200 women from 4 rural Guatemalan villages. The associations between maternal weight gain from approximate to 10 to 20 and 20 to 30 wk of pregnancy (from the first to the second and from the second to the third trimester, respectively) and fetal linear growth were tested with the use of ordinary least-squares regression. Results: Maternal weight gain from the first to the second trimester was associated with fetal femur and tibia lengths measured at both means of 17 and 30 wk (P < 0.05) and infant length at birth (P < 0.001). Weight gain from the second to the third trimester of pregnancy did not predict fetal linear growth or infant length at birth. Conclusions: Maternal weight change from the first to the second trimester of pregnancy is strongly associated with fetal growth. Mid-gestation may be a sensitive period for fetal linear growth MH - Guatemala MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC CLINICAL NUTRITION RP - NOT IN FILE U3 - TC 4 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0002-9165 UR - ISI:000220496500019 L2 - fetal linear growth;maternal weight gain;pregnancy;ultrasound;femur;tibia;INTRAUTERINE GROWTH; FEMUR LENGTH; RETARDATION; DIAGNOSIS; NUTRITION; STANDARDS; VELOCITY SO - American Journal of Clinical Nutrition 2004 ;79(4):646-652 11822 UI - 5933 AU - Neufeld LM AU - Haas JD AU - Grajeda R AU - Martorell R AD - Natl Publ Hlth Inst, Div Nutr Epidemiol, Cuernavaca, Morelos, MexicoCornell Univ, Div Nutr Sci, Ithaca, NY 14853, USAInst Nutr Cent Amer & Panama, Guatemala City, GuatemalaEmory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30322, USANeufeld, LM, Natl Publ Hlth Inst, Div Nutr Epidemiol, Cuernavaca, Morelos, Mexico TI - Ultrasound measurement of fetal size in rural Guatemala AB - Objectives: To describe the fetal growth pattern of a population from rural Guatemala and determine when during gestation growth faltering becomes evident. Methods: Ultrasound examinations were conducted for 319 women. Femur length (FL), biparietal diameter (BPD), abdominal (AC) and head circumference (F[C) were compared with reference values. Results: FL and AC were similar to reference values throughout gestation. BPD and HC were below the 50th percentile by 30 weeks' gestation and below the 10th percentile later in gestation. We expected all four dimensions to show marked growth restriction during gestation. Measurement differences may explain the results but would call into question the value of cross-study comparisons. Infants born small for gestational age were small in all measures as early as 15 weeks. Conclusions: Fetal growth faltering begins in early gestation among infants who were born small. The lack of deviation from reference data for FL and AC requires further clarification. (C) 2003 International Federation of Gynecology and Obstetrics. Published by Elsevier Ireland Ltd. All rights reserved MH - Guatemala MH - Mexico|Morelos MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 2 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0020-7292 UR - ISI:000220352800005 L2 - ultrasound;fetal size;birth size;Guatemala;rural;developing country;LOW-BIRTH-WEIGHT; FEMUR LENGTH; BIPARIETAL DIAMETER; GROWTH; CHILDREN; CHARTS; BIOMETRY; HEIGHT; INCAP SO - International Journal of Gynecology & Obstetrics 2004 ;84(3):220-228 11823 UI - 4429 AU - Newburg DS AU - Ruiz-Palacios GM AU - Altaye M AU - Chaturvedi P AU - Guerrero ML AU - Meinzen-Derr JK AU - Morrow AL AD - Univ Massachusetts, Shriver Ctr, Sch Med, Waltham, MA 02452, USA. Inst Nacl Ciencias Med & Nutr, Mexico City, DF, Mexico. Cincinnati Childrens Hosp, Med Ctr, Cincinnati, OH 45229, USA TI - Human milk alpha 1,2-linked fucosylated oligosaccharides decrease risk of diarrhea due to stable toxin of E-coli in breastfed infants MH - Mexico|Distrito Federal MH - USA T3 - PROTECTING INFANTS THROUGH HUMAN MILKAdvances in experimental medicine and biology PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U4 - Medicine, Research & Experimental U5 - S;Article NT - SEnglishArticledavid.newburg@umassmed.edu mlga@quetzal.innsz.mx Jareen.meinzen-derr@cchmc.org ardythe.morrow@cchmc.org5233 SPRING ST, NEW YORK, NY 10013 USAADVAN EXPERIMENT MED BIOLBAU75 AV - English IS - 0065-2598 UR - ISI:000223641000061 SO - 2004 ;():457-461 11824 UI - 6161 AU - Newburg DS AU - Ruiz-Palacios GM AU - Altaye M AU - Chaturvedi P AU - Meinzen-Derr J AU - Guerrero MD AU - Morrow AL AD - Univ Massachusetts, Sch Med, Shriver Ctr, Program Glycobiol, Waltham, MA 02452, USAInst Nacl Ciencias Med & Nutr, Dept Infectol, Mexico City 14000, DF, MexicoCincinnati Childrens Hosp Med Ctr, Ctr Biostat & Epidemiol, Cincinnati, OH 45229, USANewburg, DS, Univ Massachusetts, Sch Med, Shriver Ctr, Program Glycobiol, Waltham, MA 02452 USA TI - Innate protection conferred by fucosylated oligosaccharides of human milk against diarrhea in breastfed infants AB - To test the hypothesis that human milk fucosyloligosaccharides are part of an innate immune system, we addressed whether their expression (1) depends on maternal genotype and (2) protects breastfed infants from pathogens. Thus the relationship between maternal Lewis blood group type and milk oligosaccharide expression and between variable oligosaccharide expression and risk of diarrhea in their infants was studied in a cohort of 93 Mexican breastfeeding mother-infant pairs. Milk of the 67 Le(a-b+) mothers contained more LNF-II (Le(a)) and 3-FL (Le(x)) (oligosaccharides whose fucose is exclusively alpha1,3- or alpha1,4-linked) than milk from the 24 Le(a-b-) mothers; milk from Le(a-b-) mothers contained more LNF-I (H-1) and 2'-FL (H-2), whose fucose is exclusively alpha1,2-linked. The pattern of oligosaccharides varied among milk samples; in each milk sample, the pattern was summarized as a ratio of 2-linked to non-2-linked fucosyloligosaccharides. Milks with the highest ratios were produced primarily by Le(a-b-) mothers; those with the lowest ratios were produced exclusively by Le(a-b+) mothers (p<0.001). Thus maternal genetic polymorphisms expressed as Lewis blood group types are expressed in milk as varied fucosyloligosaccharide ratios. The four infants who developed diarrhea associated with stable toxin of Escherichia coli were consuming milk with lower ratios (4.4 +/- 0.8 [SE]) than the remaining infants (8.5 +/- 0.8; p<0.001). Furthermore, the 27 infants who developed moderate to severe diarrhea of any cause were consuming milk with lower ratios (6.1 +/- 0.9) than the 26 who remained healthy (10.5 +/- 1.9; p = 0.042). Thus, milk with higher 2-linked to non-2-linked fucosyloligosaccharide ratios affords greater protection against infant diarrhea. We conclude that specific oligosaccharides constitute a major element of an innate immune system of human milk MH - USA MH - Mexico|Distrito Federal PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 19 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0959-6658 UR - ISI:000189140600006 L2 - diarrhea;fucosyltransferase;Lewis blood groups;secretor;stable toxin of E.coli;BLOOD-GROUP ANTIGENS; ESCHERICHIA-COLI; ROTAVIRUS INFECTION; TRANSFERASE GENES; SUCKLING MICE; LEWIS; SECRETOR; INDIVIDUALS; BINDING; CAMPYLOBACTER SO - Glycobiology 2004 ;14(3):253-263 11825 UI - 5849 AU - Newkome GR AU - Cho TJ AU - Moorefield CN AU - Mohapatra PP AU - Godinez LA AD - Univ Akron, Goodyear Polymer Ctr, Dept Polymer Sci, Akron, OH 44325, USAUniv Akron, Goodyear Polymer Ctr, Dept Chem, Akron, OH 44325, USACtr Invest & Desarrollo Tecnol Electroquim, Queretaro, MexicoNewkome, GR, Univ Akron, Goodyear Polymer Ctr, Dept Polymer Sci, Akron, OH 44325 USA TI - Towards ordered architectures: Self-assembly and stepwise procedures to the hexameric metallomacrocycles [arylbis(terpyridinyl)(6)Fe-6-n(II)-Ru-n(II)] (n=0,2,3,5) AB - Hexameric metallomacrocycles are a new class of ordered rigid-macromolecules which possess unique structural, electronic, and physical characteristics. Directed- and self-assembly methods for the construction of these stable bis(terpyridine)-based materials are investigated by using both Fen and Run as the coordinating metals. These heterometallomacrocycles and their homocounterparts are structurally compared, and their attendant electrochemical properties are analyzed and evaluated. These studies demonstrate the potential to create stable, nanoscale, dough nut-shaped, molecular assemblies with envisioned ramifications for energy storage and release, as well as nanoscale molecular electronic and magnetic devices MH - Mexico|Queretaro MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 40 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0947-6539 UR - ISI:000220483800018 L2 - iron;metallomacro-cycles;ruthenium;self-assembly;terpyridine;SHAPE-PERSISTENT MACROCYCLES; TRANSITION-METAL-COMPLEXES; SUPRAMOLECULAR CHEMISTRY; DRUG-DELIVERY; UNIMOLECULAR MICELLES; BUILDING-BLOCKS; PHOTOPHYSICAL PROPERTIES; MOLECULAR ARCHITECTURE; CYCLIC NANOSTRUCTURES; DESIGNING DENDRIMERS SO - Chemistry-A European Journal 2004 ;10(6):1493-1500 11826 UI - 4608 AU - Newton AE AU - De Luna E AD - Nat Hist Museum, Dept Bot, London SW7 5BD, EnglandInst Ecol, Xalapa 91000, Veracruz, MexicoNewton, AE, Nat Hist Museum, Dept Bot, Cromwell Rd, London SW7 5BD, England TI - Climacium dendroides from Cofre de Perote, a high-elevation tropical montane site in Veracruz, Mexico AB - Climacium dendroides (Hedw.) F. Weber & D. Mohr is reported new to Mexico and in the first known locality in the tropics, at the elevation of 3, 000 m, on the ancient shield volcano of Cofre de Perote. Variation in branching of the costa is assessed in this plant and in material of C. dendroides worldwide. Additional taxa of interest front this locality on Cofre de Perote include Aulacomnium palustre and Polytrichum commune (both new to the state of Veracruz) MH - United Kingdom MH - Mexico|Veracruz PB - FAIRFAX: AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-2745 UR - ISI:000223476000012 L2 - 'Boreal' mosses;Climacium;distribution;Mexico;montane tropics SO - Bryologist 2004 ;107(3):368-372 11827 UI - 5578 AU - Ngamsom B AU - Bogdanchikova N AU - Borja MA AU - Praserthdam P AD - Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, ThailandUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoNgamsom, B, Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand TI - Characterisations of Pd-Ag/Al2O3 catalysts for selective acetylene hydrogenation: effect of pretreatment with NO and N2O AB - This contribution concerns the surface characterisation of the Pd-Ag/Al2O3 catalyst for the selective hydrogenation of acetylene. It is shown that, by means of the temperature programmed reduction (TPR) and temperature programmed desorption (TPD), it is possible to view the surface Pd sites of the catalyst prior to pretreatment with NO or N2O, as well as seeing the effect of Ag addition. It is shown that hydrogen adsorption on the palladium is effectively inhibited by the presence of Ag. The role of pretreatment on the activity and ethylene gain enhancement reported in our previous communication is investigated by employing transmission infrared spectroscopy. Strong adsorption of nitrate or nitrite species on Pd surface was observed from NO and N2O pretreatment, resulting in the blockage of Pd sites responsible for direct ethane formation. Accordingly, higher ethylene gain from NOx-treated catalysts was seen over the untreated catalyst. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - Thailand PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1566-7367 UR - ISI:000221213000008 L2 - Pd-Ag/Al2O3;acetylene hydrogenation;pretreatment;NO;N2O;TPR;TPD;IR;PD-AG; CO; PALLADIUM; REDUCTION; SURFACE; TPR SO - Catalysis Communications 2004 ;5(5):243-248 11828 UI - 4614 AU - nias-Calderon J AU - Verdugo-Diaz L AU - Drucker-Colin R AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoInst Ciencias Basicas, Preclin Victoria de Giron, Dept Fisiol, Havana, CubaUniv Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoDrucker-Colin, R, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, Mexico TI - Adrenalectomy and dexamethasone replacement on yawning behavior AB - Yawning, a phylogenetic behavior, present in reptiles, birds and mammals, has been studied for several decades, but to date its physiological function is still unknown. The role of stress as well as several peptides and the hypothalamus has been studied in relation to its regulation. To date however, to studies has been carried out to determine the role of the adrenal glands. Therefore, yawning behavior was studied in adrenalectomized rats, who then received dexamethasone replacement, The results show that rats whose adrenal glands were removed stopped both spontaneous and apomorphine-induced yawning, while dexamethasone reverted this effect. The results are discussed in terms of the possible role of corticosterone on yawning behavior. (C) 2004 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000223500000027 L2 - adrenal gland;glucocorticoid;apomorphine;REM-SLEEP DEPRIVATION; PENILE ERECTION; PARAVENTRICULAR NUCLEUS; ACTH; DOPAMINE; APOMORPHINE; STRESS; RATS; CORTICOSTERONE; EXPRESSION SO - Behavioural Brain Research 2004 ;154(1):255-259 11829 UI - 3621 AU - Niborski V AU - Vallee I AU - Fonseca-Linan R AU - Boireau P AU - Enciso A AU - Ortega-Pierres G AU - Yepez-Mulia L AD - IMSS, CMN Siglo 21, UIMEIP Pediat, Mexico City, DF, MexicoINRA, AFSSA, ENVA,UPVM, UMR,BIPAR, Maisons Alfort, FranceCINVESTAV, Dept Genet & Biol Mol, Mexico City 14000, DF, MexicoIMSS, VIB Zacatecas, Mexico City, DF, MexicoYepez-Mulia, L, IMSS, CMN Siglo 21, UIMEIP Pediat, Mexico City, DF, Mexico TI - Trichinella spiralis: Stimulation of mast cells by TSL-1 antigens trigger cytokine mRNA expression and release of IL-4 and TNF through an Ig-independent pathway AB - Previous in vitro studies have demonstrated that mast cells (MC) can be directly activated by Trichinella spiralis larvae 1 (TSL-1) antigens. To characterize even more this activation of MC and their possible role on induction and regulation of the Type 2 response generated against T spiralis infection, we studied the interaction between a hybrid rat MC line (HRMC), murine bone marrow MC (mBMMC), and TSL-1 antigens. Immunofluorescence staining and flow cytometry analysis showed that TSL-1 antigens bound to the surface of HRMC cells, resulting in the transcriptional induction and in the release of TNF and IL-4. Besides, an increase of IL-4 intracellular expression was also observed in mBMMC. This Suggests that MC may play an important role in the early immune response against T spiralis and may be a source of cytokines, that regulate the final onset of the immune mechanisms which determine the course of the infection. (C) 2004 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Parasitology U5 - J;Article AV - English IS - 0014-4894 UR - ISI:000225933400003 L2 - RAPID EXPULSION; IFN-GAMMA; T-CELLS; INFECTION; IMMUNITY; RATS; MICE; RESPONSES; PARASITE; TRICHINOSIS SO - Experimental Parasitology 2004 ;108(3-4):101-108 11830 UI - 2605 AU - Nichita DV AU - Minescu F AD - Petr Inst Res & Technol, ICPT, Campina, RomaniaNichita, DV, Inst Mexicano Petr, Mexico City, DF, Mexico TI - Efficient phase equilibrium calculation in a reduced flash context AB - A new and efficient method for phase equilibrium calculations using cubic equations of state (EOS) has been developed. The reduced flash technique presented here takes into account non-zero binary interaction coefficients (BIC's), and requires the iterative correction of a reduced number of independent variables (2m+3, where m is the number of components with non-zero BIC's), irrespective of the number of components in the mixture. A new extrapolation procedure, called the Direct Reduced Flash Calculation (DRFC) is formulated. Calculations performed for several hydrocarbon mixtures with emphasis to the near-critical region prove the robustness and the efficiency of the proposed method MH - Mexico|Distrito Federal MH - Romania PB - OTTAWA: CANADIAN SOC CHEMICAL ENGINEERING RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0008-4034 UR - ISI:000228079300010 L2 - equation of state;flash calculation;reduced variables;convergence;extrapolation;MULTICOMPONENT MIXTURES; CUBIC EQUATIONS; STATE; HYDROCARBONS SO - Canadian Journal of Chemical Engineering 2004 ;82(6):1225-1238 11831 UI - 5443 AU - Nichita DV AU - Gomez S AU - Luna-Ortiz E AD - Natl Autonomous Univ Mexico, IIMAS, Mexico City, DF, MexicoUniv London Imperial Coll Sci Technol & Med, London SW7 2AZ, EnglandNichita, DV, Inst Mexicano Petr, Mexico City, DF, Mexico TI - Multiphase equilibria calculation by direct minimization of Gibbs free energy using the tunnelling global optimization method AB - In this paper, we advocate the use of the Tunnelling global optimization method for phase stability analysis and for multiphase equilibria calculations. The method had been successfully used for solving a variety of phase-equilibrium problems. The Tunnelling method has two steps. First, a minimum (which may not be the putative global minimum) of the objective function is found by a local bounded minimization algorithm. In a second step, the method checks for global optimality. If the minimum found in the first step is only a local minimum, a feasible initial estimate for a new minimization is generated in another valley of the objective function. Cubic equations of state are used, but any thermodynamic model for the Gibbs free energy can be used (the method being model-independent). The proposed method has,proven to be an efficient and reliable tool for multiphase equilibrium calculation MH - United Kingdom MH - Mexico|Distrito Federal PB - CALGARY: CANADIAN INST MINING METALLURGY PETROLEUM RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Engineering, Chemical;Engineering, Petroleum U5 - J;Article AV - English IS - 0021-9487 UR - ISI:000221530500002 SO - Journal of Canadian Petroleum Technology 2004 ;43(5):13-16 11832 UI - 2147 AU - Nielsen K AU - Gall D AU - Smith P AU - Balsevicius S AU - Garrido F AU - Ferrer MD AU - Biancifiori F AU - Dajer A AU - Luna E AU - Samartino L AU - Bermudez R AU - Moreno F AU - Renteria T AU - Corral A AD - Canadian Food Inspect Agcy, Anim Dis Res Inst, Nepean, ON K2H 8P9, CanadaLab Nacl Sanidad & Prod Anim, E-18320 Granada, SpainIst Zooprofilatt Sperimentale Umbria & Marche, I-06126 Perugia, ItalyUniv Autonoma Yucatan, Fac Med Vet & Zootecnia, Merida, Yucatan, MexicoComis Nacl Sanidad Agropecuria, Coyoacan, DF Mexico, MexicoInst Pathobiol, INTA, CICV, RA-1708 Buenos Aires, DF, ArgentinaUniv Autonoma Baja California, IICV, Unidad Lab Diagnost, Mexico City, DF, MexicoNielsen, K, Canadian Food Inspect Agcy, Anim Dis Res Inst, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada TI - Comparison of serological tests for the detection of ovine and caprine antibody to Brucella melitensis AB - The indirect enzyme-linked immunosorbent assay (IELISA), the competitive enzyme-linked immunosorbent assay (CELISA) and the fluorescence polarisation assay (FPA) were evaluated with sera from sheep experimentally infected with Brucella melitensis and negative Canadian sheep. The sensitivity and specificity of the assays were as follows: IELISA: 91.7% and 97.6%, CELISA: 75.0% and 99.8% and FPA: 91.7% and 89.5%. Sera from the same experimental population were divided according to serological reaction in the rose bengal agglutination test (RBT) and the complement fixation test (CFT). Reactivity relative to the RBT positive and CFT positive sera were as follows: IELISA: 99.7%, CELISA: 93.2% and FPA: 99.1%. Since sera from goats with proven B. melitensis infection were not available, 699 sera from goats judged positive in the buffered antigen plate agglutination test (BPAT) and CFT and 982 BPAT/CFT negative Canadian goats were used. The sensitivity and specificity of the assays relative to the BPAT and CFT positive sera were: IELISA: 99.4% and 98.0%, CELISA: 95.4% and 97.1% and FPA: 92.7% and 99.8% MH - Argentina MH - Canada MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Spain PB - PARIS: OFFICE INT EPIZOOTIES RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0253-1933 UR - ISI:000229119200026 L2 - brucellosis;conventional test;diagnosis;goat;primary binding assay;sheep;FLUORESCENCE POLARIZATION ASSAY; DIAGNOSIS; ABORTUS SO - Revue Scientifique et Technique-Office International des Epizooties 2004 ;23(3):979-987 11833 UI - 5168 AU - Nielsen K AU - Smith P AU - Yu W AU - Nicoletti P AU - Elzer P AU - Vigliocco A AU - Silva P AU - Bermudez R AU - Renteria T AU - Moreno F AU - Ruiz A AU - Massengill C AU - Muenks Q AU - Kenny K AU - Tollersrud T AU - Samartino L AU - Conde S AU - de Benitez GD AU - Gall D AU - Perez B AU - Rojas X AD - Canadian Food Inspect Agcy, Anim Dis Res Inst, Nepean, ON K2H 8P9, CanadaUniv Austral Chile, Inst Microbiol, Valdivia, ChileSAG, Osorno, ChileINTA EEA Mercedes, RA-3470 Mercedes, Corrientes, ArgentinaINTA, CICVyA, Inst Patobiol, RA-1712 Castelar, Buenos Aires, ArgentinaNatl Vet Inst, Dept Immunoprophylaxis, Oslo, NorwayKeylabs Ltd, Dublin 8, IrelandDept Agr, Div Anim Hlth, Jefferson City, MO 65102, USASAGAPRA, Hermosillo, Sonora, MexicoUniv Autonoma Baja California, IICB, Mexicali 21100, Baja California, MexicoComis Nacl Energia Atom, RA-8250 Buenos Aires, DF, ArgentinaLouisiana State Univ, Dept Vet Sci, Baton Rouge, LA 70803, USAUniv Florida, Coll Vet Med, Dept Pathobiol, Gainesville, FL 32611, USANielsen, K, Canadian Food Inspect Agcy, Anim Dis Res Inst, 3851 Fallowfield Rd, Nepean, ON K2H 8P9, Canada TI - Enzyme immunoassay for the diagnosis of brucellosis: chimeric Protein A-Protein G as a common enzyme labeled detection reagent for sera for different animal species AB - A recombinant protein combining the immunoglobulin binding sites of Proteins A and G, conjugated with horseradish peroxidase was used as a universal detection reagent for the assessment of antibodies against Brucella spp. The reagent was applied in an indirect enzyme immunoassay for detection of antibodies to smooth lipopolysaccharide antigen in sera from Brucella spp. exposed and non-exposed cattle, sheep, goats and pigs and to antibodies to rough lipopolysaccharide in sheep, dogs and cattle. The results were similar to those obtained when murine monoclonal antibody-enzyme conjugates were used. An added advantage was that a universal cut-off for all tests using the proteins A and G detection reagent could be established, simplifying diagnostic interpretation of the data. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Canada MH - Chile MH - Ireland MH - Mexico|Baja California MH - Mexico|Sonora MH - Norway MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Microbiology;Veterinary Sciences U5 - J;Article AV - English IS - 0378-1135 UR - ISI:000222156400007 L2 - Brucella spp.;lipopolysaccahride;serology;indirect enzyme immunoassay;protein A/G;LINKED-IMMUNOSORBENT-ASSAY; REACTIVE ANTIBODIES; INFECTION; GLOBULIN; ABORTUS; CATTLE; OVIS SO - Veterinary Microbiology 2004 ;101(2):123-129 11834 UI - 3078 AU - Nieto-Barajas LE AU - Prunster I AU - Walker SG AD - Univ Pavia, ITAM Mexico, I-27100 Pavia, ItalyUniv Kent, Canterbury CT2 7NZ, Kent, EnglandNieto-Barajas, LE, ITA, ITAM, Dept Estadist, Rio Hondo 1,Col Tizapan San Angel, Mexico City 01000, DF, Mexico TI - Normalized random measures driven by increasing additive processes AB - This paper introduces and studies a new class of nonparametric prior distributions. Random probability distribution functions are constructed via normalization of random measures driven by increasing additive processes. In particular, we present results for the distribution of means under both prior and posterior conditions and, via the use of strategic latent variables, undertake a full Bayesian analysis. Our class of priors includes the well-known and widely used mixture of a Dirichlet process MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal PB - BEACHWOOD: INST MATHEMATICAL STATISTICS RP - NOT IN FILE U3 - TC 5 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0090-5364 UR - ISI:000227285700001 L2 - Bayesian nonparametric inference;distribution of means of random probability measures;increasing additive process;Levy measure;mixtures of Dirichlet process;DIRICHLET PROCESS; GAUSSIAN COMPONENTS; SURVIVAL ANALYSIS; FUNCTIONALS; MODELS; DISTRIBUTIONS; PRIORS SO - Annals of Statistics 2004 ;32(6):2343-2360 11835 UI - 3860 AU - Nieto-Barajas LE AU - Walker SG AD - ITAM, Dept Estadist, Mexico City 01000, DF, MexicoUniv Kent, Inst Math Stat & Acturial Sci, Canterbury CT2 7NZ, Kent, EnglandNieto-Barajas, LE, ITAM, Dept Estadist, Rio Hondo 1,Tizapan San Angel, Mexico City 01000, DF, Mexico TI - Bayesian nonparametric survival analysis via Levy driven Markov processes AB - In this paper we present and investigate a new class of non-parametric priors for modelling a cumulative distribution function. We take F(t) = 1 - exp{-Z(t)}; where Z(t) = integral(t)/(0) x(s) ds is continuous and x((.)) is a Markov process. This is in contrast to the widely used class of neutral to the right priors (Doksum (1974)) for which Z(.) is discrete and has independent increments. The Markov process allows the modelling of trends in Z(.), not possible with independent increments. We derive posterior distributions and present a, full Bayesian analysis MH - United Kingdom MH - Mexico|Distrito Federal PB - TAIPEI: STATISTICA SINICA RP - NOT IN FILE U3 - TC 4 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1017-0405 UR - ISI:000225094500008 L2 - Bayes nonparametrics;consistency;Levy process;gamma process;Markov process;stationary process;Levy driven Markov process;POSTERIOR DISTRIBUTIONS; GIBBS SAMPLER; MODELS; BETA; CONSISTENCY; ESTIMATORS; INFERENCE SO - Statistica Sinica 2004 ;14(4):1127-1146 11836 UI - 6073 AU - Nino-Vega GA AU - Sorais F AU - Calcagno AM AU - Ruiz-Herrera J AU - Martinez-Espinoza AD AU - San-Blas G AD - Inst Venezolano Invest Cient, Ctr Microbiol & Biol Celular, Caracas 1020A, VenezuelaIPN, Dept Ingn Genet, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Irapuato, Gto, MexicoNino-Vega, GA, Inst Venezolano Invest Cient, Ctr Microbiol & Biol Celular, Apartado 21827, Caracas 1020A, Venezuela TI - Cloning and expression analysis of the ornithine decarboxylase gene (PbrODC) of the pathogenic fungus Paracoccidioides brasiliensis AB - We describe the isolation and sequencing of PbrODC, the gene encoding ornithine decarboxylase (ODC) in Paracoccidioides brasiliensis. The gene contains a single open reading frame made of 1413 bp with a single intron (72 bp), and encodes a 447 amino acid polypeptide with a predicted molecular weight of 50.0 kDa, an isoelectric point of 4.9 and a high similarity to other fungal ornithine decarboxylases. Functionality of the gene was demonstrated by transformation into a Saccharomyces cerevisiae odc null mutant. A phylogenetic tree generated with several fungal ODCs provided additional evidence to favour a taxonomic position for P. brasiliensis as an ascomycetous fungus, belonging to the order Onygenales. Expression of the PbrODC gene was determined by Northern analyses during growth of the mycelial and yeast forms, and through the temperature-regulated dimorphic transition between these two extreme phases. Expression of PbrODC remained constant at all stages of the fungal growth, and did not correlate with a previously observed increase in the activity of ornithine decarboxylase at the onset of the budding process in both yeast growth and mycelium-to-yeast transition. Accordingly, post-transcriptional regulation for the product of PbrODC is suggested. The PbrODC gene sequence is available at the GenBank database under Accession No. AF212867. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Guanajuato MH - Venezuela PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Microbiology;Mycology U5 - J;Article AV - English IS - 0749-503X UR - ISI:000189307000003 L2 - Paracoccidioides brasiliensis;polyamines;gene expression;dimorphic transition;taxonomy;Onygenales;CHITIN SYNTHASE GENES; MESSENGER-RNA; SEQUENCES; POLYAMINES; YEAST; PHOROGENESIS; DIMORPHISM; TRANSITION; MUCORALES; PROTEIN SO - Yeast 2004 ;21(3):211-218 11837 UI - 4775 AU - Nishigaki T AU - Wood CD AU - Tatsu Y AU - Yumoto N AU - Furuta T AU - Elias D AU - Shiba K AU - Baba SA AU - Darszon A AD - UNAM, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Cuernavaca 62210, Morelos, MexicoAIST, Ikeda, Osaka 5638577, JapanToho Univ, Dept Biomol Sci, Funabashi, Chiba 2758510, JapanJST, PRESTO, Funabashi, Chiba 2758510, JapanIPN, Dept Elect Engn, Bioelect Sect, Mexico City 07738, DF, MexicoOchanomizu Univ, Dept Biol, Tokyo 1128610, JapanNishigaki, T, UNAM, Inst Biotechnol, Dept Dev Genet & Mol Physiol, Cuernavaca 62210, Morelos, Mexico TI - A sea urchin egg jelly peptide induces a cGMP-mediated decrease in sperm intracellular Ca2+ before its increase AB - Speract, a sperm-activating peptide (SAP) from sea urchin eggs, increases the intracellular concentration of Ca2+ ([Ca2+](i)) and modulates sperm motility. We measured the initial sperm response to speract using its caged analog and observed, for the first time, a small but significant decrease in sperm [Ca2+](i) before the increase. Both directions of the [Ca2+](i) change were completely blocked in high K+ seawater. Using membrane-permeant caged cyclic nucleotides (cNMP), only cGMP induced the decrease in [Ca2+](i) although both cGMP and cAMP increased the [Ca2+](i). The decrease in the [Ca2+](i) induced by cGMP was more notable following a second photolytic event, once [Ca (2+)] i had been elevated by an initial flash. This pattern of [Ca2+](i) change was confirmed in individual sperm. These results together with pharmacological evidence suggest that the initial [Ca2+](i) decrease is due to a Na+/Ca2+ exchanger activity, stimulated by hyperpolarization mediated by K+ efflux through cGMP-regulated K+ channels. (C) 2004 Elsevier Inc. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 20 U4 - Developmental Biology U5 - J;Article AV - English IS - 0012-1606 UR - ISI:000223133000008 L2 - speract;sperm activation;caged peptide;caged cyclic nucleotides;time-resolved Ca2+ measurement;Ca2+ imaging;sperm chemotaxis;Na+/Ca2+ exchanger;membrane potential;ion channel;ACTIVATING PEPTIDES; ACROSOME REACTION; ION CHANNELS; CALCIUM; SPERMATOZOA; CHEMOTAXIS; EXCHANGE; MEMBRANE; COAT; PH SO - Developmental Biology 2004 ;272(2):376-388 11838 UI - 5716 AU - Nishita K AU - Sun-Hyung K AU - Fujimura T AD - Univ Tsukuba, Masters Program Biosyst Studies, Tsukuba, Ibaraki 305, JapanUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Tsukuba, Inst Agr & Forest Engn, Tsukuba, Ibaraki 305, Japan TI - Cloning of a new MADS-box gene of sweet potato MH - Japan MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0032-0781 UR - ISI:000220592700621 SO - Plant and Cell Physiology 2004 ;45():S157-S157 11839 UI - 4902 AU - Noa M AU - Sanchez LM AU - Durand R AD - Univ Guadalajara, Dept Salud Publ, Guadalajara, Jalisco, MexicoUNAH, Havana, CubaCENSA, Dept Farmacol & Toxicol, Havana, CubaCENSA, Dept Clin, Havana, CubaNoa, M, Univ Guadalajara, Dept Salud Publ, Apdo Postal 1-140, Guadalajara, Jalisco, Mexico TI - Ageratum houstonianum toxicosis in Zebu cattle AB - Ageratum houstonianum (Ageratum, flossflower, blue billygoat weed) is an annual plant that tends to become a pest in gardens and pastures. Clinical signs for A houstonianum toxicosis in cattle are characterized by either an acute hemorrhagic course or sub-acute photodynamic dermatitis. The toxicosis has often been associated with Holstein-Friesian or crossbreed Holstein cattle less resistant to tropical climate conditions. During a recent especially dry spring about 40 adult Zebu cattle were found dead, while another 40/800 animals were sacrificed. The animals had been relocated to the problem area about 4 mo before, where due to the prolonged drought, A houstonianum was almost exclusively the only pasture available. The intoxicated cattle did not show the characteristic toxic dermatitis reported for A houstonianum acute toxicosis; but post-mortem examination revealed bloody serous fluid in coccyx-femoral joints and hemorrhages in the large muscle tissues, while liver, kidney and heart also had hemorrhages. To confirm the toxic plant as cause of the toxicosis, phytochemical Qualitative screening and a novel thin-layer chromatographic characterization of plant extracts were done. The chromatographic profiles of coumarin compounds, alkaloids and triterpens in ruminal and intestinal contents were similar to those obtained from A houstonianum plants from the same area, confirming ingestion of A houstonianum as cause of the toxicosis. The coincidence of adverse nutritional conditions together with the cattle's ignorance of the grazing area predisposed the plant toxicosis MH - Cuba MH - Mexico|Jalisco PB - MANHATTAN: COMPARATIVE TOXICOLOGY LAB RP - NOT IN FILE U3 - TC 0 U4 - Toxicology;Veterinary Sciences U5 - J;Article AV - English IS - 0145-6296 UR - ISI:000222582800012 SO - Veterinary and Human Toxicology 2004 ;46(4):193-194 11840 UI - 4882 AU - Nogueira G AU - Moron MA AU - Fierros-Lopez HE AU - Navarrete-Heredia JL AD - AC, Sector SEP CONACYT, Inst Ecol, Dept Entomol, Skopje 91000, MacedoniaUniv Guadalajara, Ctr Estudios Zool, CUCBA, Zapopan 45100, Jalisco, MexicoMoron, MA, AC, Sector SEP CONACYT, Inst Ecol, Dept Entomol, Apartado Postal 63, Skopje 91000, Macedonia TI - The immature stages of Neoscelis dohrni (Westwood) (Coleoptera : Scarabaeidae : Cetoniinae : Goliathini) with notes on adult behavior AB - Detailed description of the second instar larva and pupa, comparative comments on the third instar and first instar larvae, and some observations on the adult behavior and the life cycle of Neoscelis dohrni (Westwood) are presented. Diagnostic structures are illustrated, and a key to the known third instar larvae of Goliathini from the world is included MH - Macedonia MH - Mexico|Jalisco PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000222746400004 SO - Coleopterists Bulletin 2004 ;58(2):171-183 11841 UI - 4407 AU - Nomura K AU - Corzo G AU - Nakajima T AU - Iwashita T AD - Suntory Inst Bioorgan Res, Osaka 6188503, JapanUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoNomura, K, Suntory Inst Bioorgan Res, Osaka 6188503, Japan TI - Orientation and pore-forming mechanism of a scorpion pore-forming peptide bound to magnetically oriented lipid bilayers AB - The orientation and pore-forming mechanisms of pandinin 2 (pin2), an antimicrobial peptide isolated from venom of the African scorpion Pandinus imperator, bound to magnetically oriented lipid bilayers were examined by P-31 and C-13 solid-state, and N-15 liquid-state NMR spectroscopy. P-31 NMR measurements at various temperatures, under neutral and acidic conditions, showed that membrane lysis occurred only under acidic conditions, and at temperatures below the liquid crystal-gel phase transition of the lipid bilayers, after incubation for two days in the magnet. Differential scanning calorimetry measurements showed that pin2 induced negative curvature strain in lipid bilayers. The C-13 chemical shift values of synthetic pin2 labeled at Gly(3), Gly(8), Leu(12), Phe(17), or Ser(18) under static or slow magic-angle spinning conditions, indicate that pin2 penetrates the membrane with its average helical axis perpendicular to the membrane surface. Furthermore, amide H-D exchange experiments of N-15-Ala(4), Gly(8), and Ala(9) triply-labeled pin2 suggest that this peptide forms oligomers and confirms that the N-terminal region creates membrane pores MH - Japan MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 9 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000224129200033 L2 - SOLID-STATE NMR; CHEMICAL-SHIFT TENSORS; ANTIMICROBIAL PEPTIDE; PHOSPHOLIPID-BILAYERS; COAT PROTEIN; P-31 NMR; SPECTROSCOPY; MEMBRANES; DYNAMICS; MELITTIN SO - Biophysical Journal 2004 ;87(4):2497-2507 11842 UI - 4144 AU - Norini G AU - Gropelli G AU - Capra L AU - De Beni E AD - Univ Milan, Dipartimento Sci Terra A Desio, I-20133 Milan, ItalyCNR, Ist Dinam Proc Ambientale, I-20133 Milan, ItalyUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoUniv Catania, Dipartimento Sci Geol, I-95129 Catania, ItalyNorini, G, Univ Milan, Dipartimento Sci Terra A Desio, Via Mangiagalli 34, I-20133 Milan, Italy TI - Morphological analysis of Nevado de Toluca volcano (Mexico): new insights into the structure and evolution of an andesitic to dacitic stratovolcano AB - We present a morphological analysis of Nevado de Toluca volcano located 80 kin WSW of Mexico City based on digital elevation model study, where slope and aspect maps have been generated and analysed. Aerial photograph and satellite image observations improve the morphological analysis. The synoptic view which is offered by this analysis allowed for recognition and localization of the main volcanic and tectonic features of the area. On the basis of digital elevation model value distribution and surface textures, five morphological domains were defined. The most interesting domain, south of the crater, reflects the occurrence of an ancient complex volcano distinct from the adjacent areas. Interaction between the volcanic and volcano-tectonic evolution and the basement produced the other domains. Single volcanic edifices, like lava domes and scoria cones, and eruptive fractures were recognized. Finally, flank collapse scarps opened to the east and to the north were identified and four relevant morphostructural lineaments and their possible role in the Nevado de Toluca geological and structural evolution are discussed. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000224513600004 L2 - Nevado de Toluca;Mexico;volcanic geomorphology;DEM analysis;fault systems;DEBRIS FLOWS SO - Geomorphology 2004 ;62(1-2):47-61 11843 UI - 5342 AU - ntano-Lopez R AU - Keddam M AU - Takenouti H AD - Univ Paris 06, UPR 15 CNRS, Lab Interfaces & Syst Electrochim, F-75252 Paris 05, FranceAntano-Lopez, R, CIDTE, SC, Parque Tecnol Queretaro Sandfandila S-N,Pedro Esc, Mexico City 76700, DF, Mexico TI - Interface capacitance at mercury and iron electrodes in the presence of organic compound AB - A new experimental setup that determines simultaneously the electrochemical impedance spectrum and the modulation of interface capacitance induced by the impedance measurement itself is described Then, the signal processing used to determine the traditional impedance spectrum and the modulation of interface capacitance at the same frequency as for the impedance measurement is discussed. Two model systems have been used to illustrate the implications of faradaic processes for the interface capacitance. First, an ideally polarisable interface, an Hg electrode in KCl solution, was examined. It was found that the interfacial capacitance changed instantaneously, and the sign of the capacitance modulation changed when the electrode potential crossed the potential of zero charge (PZC). In the presence of n-butyl alcohol in the same system, however, the capacitance modulation response was quite different. A negative slope of the capacitance-potential curve was verified only at extremely low frequencies, although the system still remained an ideally polarisable one. The second system model examined was Fe in H2SO4 solution at the open circuit corrosion potential. In the absence of inhibitor, only one time constant was observed, and this phenomenon was attributed to the relaxation of surface coverage by H-ads. In the presence of propargylic alcohol, two relaxation phenomena were observed, both in the impedance spectrum and in the capacitance modulation. The faster relaxation process it-as attributed to that of the reaction intermediate of Fe dissolution, and the slower phenomenon to the adsorption-desorption of the inhibitor MH - France MH - Mexico|Distrito Federal PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1478-422X UR - ISI:000221890300015 L2 - double layer capacitance;faradaic process;adsorption;relaxation of adsorbed species;inhibitor;ELECTROCHEMICAL IMPEDANCE; ANODIC-DISSOLUTION; TIME SO - Corrosion Engineering Science and Technology 2004 ;39(1):59-64 11844 UI - 4694 AU - Nunez C AU - Adams L AU - Childers S AU - Lovley DR AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoUniv Idaho, Dept Geol Sci, Moscow, ID 83844, USAUniv Massachusetts, Dept Microbiol, Amherst, MA 01003, USANunez, C, Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Microbiol, Av Univ 2001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - The RpoS sigma factor in the dissimilatory Fe(III)-reducing bacterium Geobacter sulfurreducens AB - Geobacter sulfurreducens RpoS sigma factor was shown to contribute to survival in stationary phase and upon oxygen exposure. Furthermore, a mutation in rpoS decreased the rate of reduction of insoluble Fe(III) but not of soluble forms of iron. This study suggests that RpoS plays a role in regulating metabolism of Geobacter under suboptimal conditions in subsurface environments MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000223179000043 L2 - URANIUM-CONTAMINATED AQUIFER; STATIONARY-PHASE SURVIVAL; ESCHERICHIA-COLI; RNA-POLYMERASE; FE(III) REDUCTION; METAL REDUCTION; SP-NOV; GENE; CYTOCHROME; SEDIMENTS SO - Journal of Bacteriology 2004 ;186(16):5543-5546 11845 UI - 4358 AU - Nunez E AU - Steffey EP AU - Ocampo L AU - Rodriguez A AU - Garcia AA AD - Univ Calif Davis, Dept Surg & Radiol Sci, Sch Vet Med, Davis, CA 95616, USANatl Autonomous Univ Mexico, Dept Med & Surg Equines, Sch Vet Med, Mexico City 04510, DF, MexicoSteffey, EP, Univ Calif Davis, Dept Surg & Radiol Sci, Sch Vet Med, Davis, CA 95616 USA TI - Effects of 2(alpha)-adrenergic receptor agonists on urine production in horses deprived of food and water AB - Objective-To quantitate the dose- and time-related effects of IV administration of xylazine and detomidine on urine characteristics in horses deprived of feed and water. Animals-6 horses. Procedure-Feed and water were withheld for 24 hours followed by IV administration of saline (0.9% NaCl) solution, xylazine (0.5 or 1.0 mg/kg), or detomidine (0.03 mg/kg). Horses were treated 4 times, each time with a different protocol. Following treatment, urine and blood samples were obtained at 15, 30, 60, 120, and 180 minutes. Blood samples were analyzed for PCV and serum concentrations of total plasma solids, sodium, and potassium. Urine samples were analyzed for pH and concentrations of glucose, proteins, sodium, and potassium. Results-Baseline (before treatment) urine flow was 0.30 +/- 0.03 mL/kg/h and did not significantly change after treatment with saline solution and low-dose xylazine but transiently increased by 1 hour after treatment with high-dose xylazine or detomidine. Total urine output at 2 hours following treatment was 312 +/- 101 mL versus 4,845 +/- 272 mL for saline solution and detomidine, respectively. Absolute values of urine concentrations of sodium and potassium also variably increased following xylazine and detomidine administration. Conclusions and Clinical Relevance-Xylazine and detomidine administration in horses deprived of feed and water causes transient increases in urine volume and loss of sodium and potassium. Increase in urine flow is directly related to dose and type of alpha(2)-adrenergic receptor agonist. Dehydration in horses may be exacerbated by concurrent administration of alpha(2)-adrenergic receptor agonists MH - USA MH - Mexico|Distrito Federal PB - SCHAUMBURG: AMER VETERINARY MEDICAL ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0002-9645 UR - ISI:000224069100005 L2 - XYLAZINE; HYPERGLYCEMIA; ELECTROLYTE; ANESTHESIA; DETOMIDINE; SERUM; FLUID SO - American Journal of Veterinary Research 2004 ;65(10):1342-1346 11846 UI - 4056 AU - Nunez M AU - Hess PO AU - Schuch D AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, GermanyNunez, M, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior,CU,Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Quantum mechanics in dissipative systems with a strong magnetic field AB - Quantum mechanics in dissipative systems with a magnetic field is discussed. For strong magnetic fields the system exhibits an oscillatory behavior around the classical trajectory of the electron which should generate emissions in the millimeter range of the electromagnetic spectrum MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000224623000015 L2 - DAMPED HARMONIC-OSCILLATOR; LANGEVIN EQUATION; MOTION; IRREVERSIBILITY; FRICTION; EXAMPLE SO - Physical Review A 2004 ;70(3): 11847 UI - 4508 AU - Nunez M AU - Lerma S AU - Hess PO AU - Jesgarz S AU - Civitarese O AU - Reboiro M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, BrazilNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaNunez, M, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Modeling pentaquark and heptaquark states AB - A schematic model for hadronic states, based on constituent quarks and antiquarks and gluon pairs, is discussed. The phenomenological interaction between quarks and gluons is QCD motivated. The obtained hadronic spectrum leads to the identification of nucleon and Delta resonances and to pentaquark and heptaquark states. The predicted lowest pentaquark state (J(pi)=1/2(-)) lies at the energy of 1.5 GeV and it is associated to the observed Theta(+)(1540) state. For heptaquarks (J(pi)=1/2(+),3/2(+)) the model predicts the lowest state at 2.5 GeV MH - Argentina MH - Brazil MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000223717900036 L2 - SOLVABLE MODEL SO - Physical Review C 2004 ;70(2): 11848 UI - 4220 AU - Nunez MV AU - Lerma SH AU - Hess PO AU - Jesgarz S AU - Civitarese O AU - Reboiro M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, BrazilNatl Univ La Plata, Dept Fis, RA-1900 La Plata, ArgentinaNunez, MV, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Schematic model for QCD. III. Hadronic states AB - The hadronic spectrum obtained in the framework of a QCD-inspired schematic model is presented. The model is the extension of a previous version, whose basic degrees of freedom are constituent quarks, antiquarks, and gluons. The interaction between quarks and gluons is a phenomenological interaction and its parameters are fixed from data. The classification of the states, in terms of quark and antiquark and gluon configurations is based on symmetry considerations, and it is independent of the chosen interaction. Following this procedure, nucleon and Delta resonances are identified, as well as various penta- and hepta-quarks states. The lowest pentaquarks state is predicted at 1.5 GeV and it has negative parity, while the lowest hepta-quarks state has positive parity and its energy is of the order of 2.5 GeV MH - Argentina MH - Brazil MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000224325900056 L2 - SOLVABLE MODEL; BARYONS SO - Physical Review C 2004 ;70(3): 11849 UI - 4202 AU - O'Brien DM AU - Garcia PJV AU - Ferreira J AU - Cabrit S AU - Binette L AD - Univ Porto, Ctr Astrofis, P-4100 Oporto, PortugalFac Ciencias Porto, Dept Matemat Aplicada, Oporto, PortugalUniv Porto, Fac Engn, P-4100 Oporto, PortugalLab Astrophys Grenoble, Grenoble, FranceObserv Paris, LERMA, F-75014 Paris, FranceNatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoO'Brien, DM, Univ Porto, Ctr Astrofis, Rua Campo Alegre 823, P-4100 Oporto, Portugal TI - The temperature and ionization of T-Tauri micro-jets AB - The effects of phenomenological heating functions on the flow thermodynamics of cold T-Tauri disk winds are examined. Turbulent dissipation ( mechanical) heating and a warm disk corona are invoked to heat the wind. The temperature and ionization evolution are solved for along the flow. The results allow the construction of synthetic observations; emission maps, forbidden line ratios, line fluxes and line profiles; and successfully reproduce a number of observed trends. Mechanical heating produces line ratios and fluxes that fit very well with observations. Invoking a warm disk corona successfully reproduces forbidden line profile low velocity components MH - France MH - Mexico|Distrito Federal MH - Portugal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000224461300074 L2 - ISM : jets and outflows;stars : pre-main sequence;MHD;line;profiles;accretion disks;coronae;ACCRETION-EJECTION STRUCTURES; MAGNETICALLY-DRIVEN JETS; AMBIPOLAR DIFFUSION; THERMAL STRUCTURE; WINDS; STARS; DISKS; DISCS SO - Astrophysics and Space Science 2004 ;292(1-4):609-617 11850 UI - 3950 AU - O'Neill MS AU - Loomis D AU - Aburto VHB AU - Gold D AU - Hertz-Picciotto I AU - Castillejos M AD - Harvard Univ, Sch Publ Hlth, Environm Epidemiol Program, Sch Med, Boston, MA 02215, USAUniv N Carolina, Chapel Hill, NC, USADirecc Salud Ambiental, Mexico City, DF, MexicoBrigham & Womens Hosp, Channing Lab, Boston, MA 02115, USAUniv Calif Davis, Sch Med, Dept Epidemiol & Prevent Med, Davis, CA 95616, USAUniv Autonoma Metropolitana, Xochimilco, MexicoO'Neill, MS, Harvard Univ, Sch Publ Hlth, Environm Epidemiol Program, Sch Med, 401 Pk Dr Suite 415 W,POB 15698, Boston, MA 02215 USA TI - Do associations between airborne particles and daily mortality in Mexico City differ by measurement method, region, or modeling strategy? AB - We evaluated whether associations between PM10 and daily mortality in Mexico City differ by the PM10 measurement device or by regional differences in particle composition. Additionally, we reanalyzed previously collected data in light of recent insights about flaws in commonly used time series analysis techniques. We examined daily associations between mortality and four indicators of ambient PM10 using Poisson regression, controlling for temperature and time trends with cubic natural splines. Associations were calculated for five subregions corresponding to five monitoring sites and pooled for the entire metropolitan area. PM(1)0 was measured with three methods: Tapered Element Oscillating Microbalance ( TEOM), Sierra-Anderson High Volume ( Hi-Vol) and Harvard Impactor ( HI), the latter only at one site. In addition, predicted values of daily PM10 were developed using the Hi-Vol measurements, which were taken every sixth day, and weather, visibility and other pollutant data. We assigned deaths to the exposure from the monitor nearest to their residence. We also re-evaluated the HI PM2.5 and mortality association in southwest Mexico City, which was estimated previously using nonparametric statistical models. Slight decreases in effect estimates were observed ( a 1.45% increase ( 95% CI: 0.09%, 2.83%) in total mortality per 10 mug/m(3) increment of PM2.5 at lag 0) compared to a 1.68% change ( 95% CI: 0.45%, 2.93%) using the previously employed nonparametric approach. Using data pooled over all the regions, PM10 measured by the TEOM and the predicted PM10 values showed little association with mortality at any of the lags examined. The pooled estimates for Hi-Vol PM10 ( using one sixth of the data) were positive across all lags examined and significant for lags 3 and 5. No consistent patterns of differing associations were seen across regions that would correspond with particle toxicity or composition. Particulate air pollution, measured with gravimetric methods, is associated with daily mortality and presents a risk to health in Mexico City. The reanalysis suggests that previous research is robust to statistical method and likely to yield the same overall conclusions about the short-term effects of airborne particles on mortality MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Toxicology U5 - J;Article AV - English IS - 1053-4245 UR - ISI:000225022800002 L2 - air pollution;mortality;Mexico City;monitors;PM10;PARTICULATE AIR-POLLUTION; GENERALIZED ADDITIVE-MODELS; TIME-SERIES; US CITIES; MATTER; PM10; REGRESSION; HEALTH SO - Journal of Exposure Analysis and Environmental Epidemiology 2004 ;14(6):429-439 11851 UI - 5937 AU - O'Neill MS AU - Loomis D AU - Borja-Aburto VH AD - Univ N Carolina, Dept Epidemiol, Chapel Hill, NC, USAInst Mexicano Seguro Social, Mexico City, DF, MexicoO'Neill, MS, Harvard Univ, Sch Publ Hlth, Dept Environm Hlth, Environm Epidemiol Program, Suite 415 W,401 Pk Dr, Boston, MA 02215 USA TI - Ozone, area social conditions, and mortality in Mexico City AB - We investigated whether the association of daily mortality and ambient ozone differs by age and area social conditions of the region of residence using a time-series analysis. The study setting was metropolitan Mexico City, a high altitude city situated in a valley, with an estimated 20 million inhabitants, large socioeconomic gradients, and ozone levels frequently exceeding international standards. We stratified daily deaths by six census-derived socioeconomic indicators, based on characteristics of the county where decedents lived. We used Poisson regression to model the association between daily mortality and ozone levels (on the day of death and the previous day) in separate models, stratified by area socioeconomic level and age, and controlling for time trends and temperature. Ozone was positively associated with total mortality [0.65% increase per 10 ppb increment, 95% confidence interval (CI): 0.02%, 1.28%] and for mortality among those over age 65 [1.39% increase per 10 ppb increment, 95% CI: 0.51%, 2.28%]. Associations between ozone and all-age mortality did not show any consistent patterns according to socioeconomic gradients. We conclude that elderly people are at higher risk for ozone-associated mortality. Though county-level social indicators in Mexico City were not strong markers of vulnerability to ozone-associated acute mortality in this analysis, complex associations between individual and area-level factors may exist that would require additional data and further analyses to elucidate. (C) 2003 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 13 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000220349600002 L2 - air pollution;ozone;social conditions;mortality;Mexico city;AIR-POLLUTION; TIME-SERIES; HEALTH; MATTER; EXPOSURES; MODELS; RACE SO - Environmental Research 2004 ;94(3):234-242 11852 UI - 4173 AU - Obregon O AU - Quevedo H AU - Ryan MP AD - Univ Guanajuato, Inst Fis, Leon Guanajuato 37150, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Phys, Davis, CA 95616, USAObregon, O, Univ Guanajuato, Inst Fis, POB E-143, Leon Guanajuato 37150, Mexico TI - Time and "angular" dependent backgrounds from stationary axisymmetric solutions AB - Backgrounds depending on time and on angular variable, namely, polarized and unpolarized S(1)xS(2) Gowdy models, are generated as the sector inside the horizons of the manifold corresponding to axisymmetric solutions. As is known, an analytical continuation of ordinary D-branes, iD-branes allow one to find S-brane solutions. Simple models have been constructed by means of analytic continuation of the Schwarzschild and the Kerr metrics. The possibility of studying the i-Gowdy models obtained here is outlined with an eye toward seeing if they could represent some kind of generalized S-branes depending not only on time but also on an angular variable MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000224462000077 L2 - GRAVITATIONAL-FIELDS; COSMOLOGICAL MODELS; SPACETIMES SO - Physical Review D 2004 ;70(6): 11853 UI - 4386 AU - Obregon O AU - Quevedo H AU - Ryan MP AD - Univ Guanajuato, Inst Fis, Leon, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Phys, Davis, CA 95616, USAObregon, O, Univ Guanajuato, Inst Fis, POB E-143, Leon, Mexico TI - Regular non-twisting S-braves AB - We construct a family of time and angular dependent, regular S-brave solutions which corresponds to a simple analytical continuation of the Zipoy-Voorhees 4-dimensional vacuum spacetime. The solutions are asymptotically flat and turn out to be free of singularities without requiring a twist in space. They can be considered as the simplest non-singular generalization of the singular S0-brave solution. We analyze the properties of a representative of this family of solutions and show that it resembles to some extent the asymptotic properties of the regular Kerr S-brave. The R-symmetry corresponds, however, to the general lorentzian symmetry. Several generalizations of this regular solution are derived which include a charged S-brave and an additional dilatonic field MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 2 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1126-6708 UR - ISI:000224125000005 L2 - superstrings and heterotic strings;p-braves;EQUATIONS SO - Journal of High Energy Physics 2004 ;(7): 11854 UI - 5757 AU - Ocampo FC AU - Moron MA AD - Univ Nebraska, State Museum, Lincoln, NE 68588, USAInst Ecol AC, Sector SEP CONA CYT, Dept Entomol, Xalapa 91000, Veracruz, MexicoOcampo, FC, Univ Nebraska, State Museum, W 436 Nebraska Hall, Lincoln, NE 68588 USA TI - Description of the third instar larva of Hemiphileurus dispar kolbe (Coleoptera : scarabaeidae : dynastinae : phileurini) AB - The larva of the dynastine scarab beetle Hemiphileurus dispar Kolbe from Dominican Republic, Hispaniola, and Greater Antilles is described. A key to the larvae is provided for the known species of the tribe Phileurini in the New World, which now includes ten species of larvae in six genera MH - Mexico|Veracruz MH - USA PB - WASHINGTON: ENTOMOL SOC WASHINGTON RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0013-8797 UR - ISI:000220676400015 L2 - Hemiphileurus;larvae;hispaniola SO - Proceedings of the Entomological Society of Washington 2004 ;106(2):412-416 11855 UI - 4035 AU - Ocana JL AU - Molpeceres C AU - Porro JA AU - Gomez G AU - Morales M AD - Univ Politecn Madrid, ETSI Ind, Dept Appl Phys, ETSIIMLAS, E-28006 Madrid, SpainUniv Politecn Madrid, Ctr Laser UPM, Madrid 28031, SpainCIDESI, Queretaro, MexicoOcana, JL, Univ Politecn Madrid, ETSI Ind, Dept Appl Phys, ETSIIMLAS, C-Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Experimental assessment of the influence of irradiation parameters on surface deformation and residual stresses in laser shock processed metallic alloys AB - Laser shock processing (LSP) has been proposed as a competitive alternative technology to classical surface treatments for improving fatigue, corrosion and wear resistance of metals, and has recently been developed as a practical process amenable to production engineering. In the present paper a summary is provided of different experimental results obtained from the most recent LSP experiments carried out by the authors along with some conclusions for the assessment of LSP technology as a profitable method for the extension of fatigue life in critical heavy duty components. In particular, a principle demonstration has been obtained on the capability of frequency doubled Nd:YAG lasers to induce compressive residual stresses in a highly deformable material as aluminium, although reasonable doubts arise on their capability to induce these tensions over extended depths (what is really an objective in comparison with other competitive technologies) or in less deformable materials (i.e. stainless steels). (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Queretaro MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000224655200094 L2 - laser shock processing;surface treatment;residual stresses;optical instrumentation;WATER-CONFINEMENT REGIME; PLASMA; WAVES; GENERATION; ALUMINUM SO - Applied Surface Science 2004 ;238(1-4):501-505 11856 UI - 5261 AU - Odom S AU - Gomez G AU - Kovarova M AU - Furumoto Y AU - Ryan JJ AU - Wright HV AU - Gonzalez-Espinosa C AU - Hibbs ML AU - Harder KW AU - Rivera J AD - NIAMSD, Mol Inflammat Sect, Mol Immunol & Inflammat Branch, NIH, Bethesda, MD 20892, USAVirginia Commonwealth Univ, Dept Biol, Richmond, VA 23284, USACINVESTAV Zona Sur, Dept Pharmacol, Mexico City 14330, DF, MexicoLudwig Inst Canc Res, Melbourne Tumour Biol Branch, Melbourne, Vic 3050, AustraliaRivera, J, NIAMSD, Mol Inflammat Sect, Mol Immunol & Inflammat Branch, NIH, Bldg 10,Room 9N228, Bethesda, MD 20892 USA TI - Negative regulation of immunoglobulin E-dependent allergic responses by Lyn kinase AB - A role for Lyn kinase as a positive regulator of immunoglobulin (Ig)E-dependent allergy has long been accepted. Contrary to this belief, Lyn kinase was found to have an important role as a negative regulator of the allergic response. This became apparent from the hyperresponsive degranulation of lyn(-/-) bone marrow-derived mast cells, which is driven by hyperactivation of Fyn kinase that occurs, in part, through the loss of negative regulation by COOH-terminal Src kinase (Csk) and the adaptor, Csk-binding protein. This phenotype is recapitulated in vivo as young lyn(-/-) mice showed an enhanced anaphylactic response. In vivo studies also demonstrated that as lyn(-/-) mice aged, their serum IgE increased as well as occupancy of the high affinity IgE receptor (FcepsilonRI). This was mirrored by increased circulating histamine, increased mast cell numbers, increased cell surface expression of the high affinity IgE receptor (FcepsilonRI), and eosinophilia. The increased IgE production was not a consequence of increased Fyn kinase activity in lyn(-/-) mice because both lyn(-/-) and lyn(-/-) fyn(-/-) mice showed high IgE levels. Thus, lyn(-/-) mice and mast cells thereof show multiple allergy-associated traits, causing reconsideration of the possible efficacy in therapeutic targeting of Lyn in allergic disease MH - Australia MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ROCKEFELLER UNIV PRESS RP - NOT IN FILE U3 - TC 59 U4 - Immunology;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0022-1007 UR - ISI:000222047800005 L2 - Lyn kinase;IgE;mast cells;allergy;degranulation;FC-EPSILON-RI; AFFINITY IGE RECEPTOR; GLYCOSPHINGOLIPID-ENRICHED MICRODOMAINS; PROTEIN-TYROSINE KINASE; MAST-CELL DEGRANULATION; CYTOKINE PRODUCTION; DEFICIENT MICE; AUTOIMMUNE-DISEASE; HISTAMINE-RELEASE; MEMBRANE DOMAINS SO - Journal of Experimental Medicine 2004 ;199(11):1491-1502 11857 UI - 4472 AU - Odriozola G AU - Leone R AU - Schmitt A AU - Callejas-Fernandez J AU - Martinez-Garcia R AU - Hidalgo-Alvarez R AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Republica, Fac Quim, Dept Quim Fis & Matemat, Montevideo 11800, UruguayUniv Granada, Dept Fis Aplicada, E-18071 Granada, SpainOdriozola, G, Inst Mexicano Petr, Programa Ingn Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Irreversible versus reversible aggregation: Mean field theory and experiments AB - Colloidal aggregation processes arising at different electrolyte concentrations were studied by means of experiments and confronted with theoretical predictions of different kinetic aggregation models. For this purpose, aqueous dispersions of relatively large polystyrene microspheres were chosen as experimental systems. Aggregation was induced by adding KBr electrolyte to the initially stable particle dispersions. During the aggregation processes, the cluster-size distribution was monitored by means of single cluster light scattering. Analyzing the time evolution of the monomer concentration, we found that the processes arising even at moderate electrolyte concentrations cannot be described by pure time-independent irreversible aggregation models. Hence, alternative models such as time-dependent irreversible aggregation and several reversible aggregation models were also tested. The model that considers a time-dependent sticking probability was found to fit the data quite satisfactorily. Nevertheless, the fitted was so slow that it seems not very likely to find such a behavior in real systems. The aggregation-fragmentation models reported in the literature were unable to reproduce the experimental observations. Hence, a more realistic reversible aggregation model was developed. This model accounts also for reenforced or double bonds between the constituent particles. The corresponding fit improved significantly and reached the same quality as the time-dependent model. Moreover, the obtained fitting parameters were in qualitative agreement with the DLVO predictions and so, reversible aggregation seems to be a more reasonable explanation for the experimental data than time-dependent irreversible aggregation. However, no definite statement on the possible secondary bond fragmentation mechanism may be made since both the applied shear stress in the measuring cell and thermal fluctuations can cause weaker bonds to break. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Spain MH - Uruguay PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000223720600052 L2 - COLLOIDAL AGGREGATION; FRAGMENTATION PROCESSES; STOCHASTIC SIMULATION; LIGHT-SCATTERING; TRANSITION; KINETICS; RLCA; DLCA SO - Journal of Chemical Physics 2004 ;121(11):5468-5481 11858 UI - 6132 AU - Odriozola G AU - Leone R AU - Moncho-Jorda A AU - Schmitt A AU - Hidalgo-Alvarez R AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Republica, Fac Quim, Dept Quim Fis & Matemat, Montevideo 11800, UruguayUniv Granada, Dept Fis Aplicada, E-18071 Granada, SpainOdriozola, G, Inst Mexicano Petr, Programa Ingn Mol, Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Coupled aggregation and sedimentation processes: stochastic mean field theory AB - In this paper, we present a stochastic model for obtaining the time evolution of the cluster size distribution for systems following coupled aggregation and sedimentation processes. Both, diffusion-limited cluster aggregation conditions and reaction limited cluster aggregation conditions are studied under the effect of sedimentation. For this purpose, the master equation is adapted for considering several slices where cluster aggregation and mass transport through the boundaries are taken into account. Furthermore, the kernel needed to solve the stochastic equation is adapted for considering the sticking probability, P, and the Peclet number, Pe, as parameters. The obtained solutions are then compared with the time evolution of the cluster size distribution obtained by means of computer simulations in Leone et at. (Eur. Phys. J. E 7 (2002) 105), Odriozola et al. (Phys. Rev. E (2003) 031405). (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - Uruguay PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000189215600003 L2 - aggregation-sedimentation processes;master equation;stochastic resolution;COLLOIDAL AGGREGATION; CHEMICAL-REACTIONS; SIMULATIONS; TRANSITION; KINETICS; DLCA; RLCA SO - Physica A-Statistical Mechanics and Its Applications 2004 ;335(1-2):35-46 11859 UI - 4412 AU - Oey MS AU - Garcia-Segura G AD - Univ Michigan, Dept Astron, Ann Arbor, MI 48109, USAUniv Nacl Autonoma Mexico, Astron Inst, Ensenada 22830, Baja California, MexicoOey, MS, Univ Michigan, Dept Astron, 830 Dennison Bldg, Ann Arbor, MI 48109 USA TI - Ambient interstellar pressure and superbubble evolution AB - High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous observed growth rate discrepancy for supernova-driven superbubbles and stellar wind bubbles. Pressures of P/k similar to 10(5) cm(-3) K are plausible for regions with high star formation rates, and these values are intermediate between the estimated Galactic midplane pressure and those observed in starburst galaxies. High-pressure components also are commonly seen in Galactic interstellar medium (ISM) localizations. We demonstrate the sensitivity of shell growth to the ambient pressure and suggest that superbubbles ultimately might serve as ISM barometers MH - USA MH - Mexico|Baja California PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224074400024 L2 - galaxies : ISM;ISM : bubbles;ISM : general;Magellanic Clouds;supernova remnants;LARGE-MAGELLANIC-CLOUD; H-II REGIONS; FAR-INFRARED SPECTROSCOPY; X-RAYS; SUPERNOVA REMNANT; STELLAR WIND; MASS-LOSS; MAGNETIC-FIELDS; OB1 ASSOCIATION; STAR-FORMATION SO - Astrophysical Journal 2004 ;613(1):302-311 11860 UI - 3045 AU - Ohlsson JL AU - Vilarreal G AD - Univ Gothenburg, Dept Ophthalmol, Molndal, SwedenUANL, Dept Ophthalmol, Monterrey, Mexico TI - Normal visual acuity in 17-18-year olds MH - Mexico|Nuevo Leon MH - Sweden PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338201500 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U418-U418 11861 UI - 3914 AU - Ohno H AU - Doi R AU - Kashima Y AU - Murae S AU - Kizaki T AU - Hitomi Y AU - Nakano N AU - Harada M AD - Kyorin Univ, Sch Med, Dept Mol Predict Med & Sport Sci, Mitaka, Tokyo 1818611, JapanYokohama City Univ, Sch Med, Dept Hyg, Yokohama, Kanagawa 2360004, JapanSupervis Operat, Inst Salud, Toluca, MexicoKumamoto Gakuen Univ, Dept Social Welf Studies, Kumamoto 8628680, JapanOhno, H, Kyorin Univ, Sch Med, Dept Mol Predict Med & Sport Sci, 6-20-2 Shinkawa, Mitaka, Tokyo 1818611, Japan TI - Wide use of Merthiolate may cause mercury poisoning in Mexico MH - Japan MH - Mexico|Estado De Mexico PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000224990200001 L2 - THIMEROSAL; POLLUTION; HAIR SO - Bulletin of Environmental Contamination and Toxicology 2004 ;73(5):777-780 11862 UI - 4598 AU - Ojeda-Bustamante W AU - Sifuentes-Ibarra E AU - Slack DC AU - Carrillo M AD - Univ Arizona, Dept Agr & Biosyst Engn, Tucson, AZ 85721, USAUniv Autonoma Chapingo, Chapingo 52550, MexicoInst Mexicano Tecnol Agua, Morelos 62550, MexicoSlack, DC, Univ Arizona, Dept Agr & Biosyst Engn, Tucson, AZ 85721, USA TI - Generalization of irrigation scheduling parameters using the growing degree days concept: Application to a potato crop AB - An accurate irrigation scheduling methodology is necessary in crops with high water stress sensitivity and production cost. This involves the estimation of the scheduling parameters related with crop water requirements during phenological stages under different irrigation application systems. This paper presents several models to represent the parameters of irrigation scheduling based on growing degree days (GDD) such as: management allowed soil water depletion (MAD), rooting depth (R-d) and crop coefficient (K-c). The proposed models were applied accurately to schedule irrigation in two commercial fields of potato under two irrigation methods: surface and sprinkler irrigation. Results show that the model predicted irrigations in a consistent and logical manner. The proposed models are versatile, feasible and easily implemented in irrigation scheduling computer programs. Copyright (C) 2004 John Wiley Sons, Ltd MH - Mexico|Estado De Mexico MH - Mexico|Morelos MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Water Resources U5 - J;Article AV - English IS - 1531-0353 UR - ISI:000223480200004 L2 - irrigation scheduling;potato irrigation;growing degree days;rooting depth;crop coefficient;MODEL SO - Irrigation and Drainage 2004 ;53(3):251-261 11863 UI - 4175 AU - Olague G AU - de Vega FF AU - Perez CB AU - Lutton E AD - CICESE, Div Appl Phys, Res Ctr, Ensenada 22860, Baja California, Mexico. Univ Extremadura, Dept Comp Sci, Ctr Univ Merida, Merida 06800, Spain. INRIA Rocquencourt, Complex Team, F-78153 Le Chesnay, France TI - The infection algorithm: An artificial epidemic approach for dense stereo matching AB - We present a new bio-inspired approach applied to a problem of stereo images matching. This approach is based on an artifical epidemic process, that we call "the infection algorithm." The problem at hand is a basic one in computer vision for 3D scene reconstruction. It has many complex aspects and is known as an extremely difficult one. The aim is to match the contents of two images in order to obtain 3D informations which allow the generation of simulated projections from a viewpoint that is different from the ones of the initial photographs. This process is known as view synthesis. The algorithm we propose exploits the image contents in order to only produce the necessary 3D depth information, while saving computational time. It is based on a set of distributed rules, that propagate like an artificial epidemy over the images. Experiments on a pair of real images are presented, and realistic reprojected images have been generated MH - France MH - Mexico|Baja California MH - Spain T3 - PARALLEL PROBLEM SOLVING FROM NATURE - PPSN VIIILecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleolague@cicese.mx2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAX55 AV - English IS - 0302-9743 UR - ISI:000224103300063 SO - 2004 ;():622-632 11864 UI - 4687 AU - Oleschko K AU - Parrot JF AU - Ronquillo G AU - Shoba S AU - Stoops G AU - Marcelino V AD - Univ Nacl Autonoma Mexico, Inst Geol, Lab Anal Fractal Sistemas Nat, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoState Univ Ghent, Dept Soil Sci & Geol, B-9000 Ghent, BelgiumOleschko, K, Univ Nacl Autonoma Mexico, Inst Geol, Lab Anal Fractal Sistemas Nat, Mexico City 04510, DF, Mexico TI - Weathering: Toward a fractal quantifying AB - Weathering occurs over a wide range of scales. To link features through these scales is a major challenge for interdisciplinary weathering studies. Fractal approach seems to be specially useful for this purpose. We introduce a multistep fractal weathering assessment scheme devoted to extract fractal weathering classifiers from texture analysis of the mineral's image. Our scheme enables to quantitatively estimate the global and local information about the geometry of the weathering pattern. This information is basic to develop geometrical indices of weathering, which can significantly enrich the common qualitative and semiquantitative weathering assessment schemes. To justify the fractal approach, a strong statistical self-similarity has been documented for both the weathering and fresh features of two common silica minerals: quartz and biogenic A-opal (phytolith) over four orders of length scales. The procedure is fast, drastically reduces thresholding bias, promises to be universal, it is valid for genetically different minerals and rock types, scale independent, and specially useful for monitoring the changes in the mineral's roughness during the alteration. Two of the proposed classifiers seem to be potentially useful for direct application in the field and be used by nonspecialist MH - Belgium MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0882-8121 UR - ISI:000223269600005 L2 - scale invariance;texture;roughness;thresholding;quartz;phytolith;GRANITIC-ROCKS; QUARTZ GRAINS; SOILS; LACUNARITY; MORPHOLOGY; CLASSIFICATION; DIMENSION; GEOMETRY; PATTERNS; INDEXES SO - Mathematical Geology 2004 ;36(5):607-627 11865 UI - 5829 AU - Oliart A AU - Snyder W AD - Boston Univ, Dept Comp Sci, Boston, MA 02215, USALab Nacl Informat Avanzada AC, Xalapa, Veracruz, MexicoSnyder, W, Boston Univ, Dept Comp Sci, 111 Cummington St, Boston, MA 02215 USA TI - Fast algorithms for uniform semi-unification AB - Uniform semi-unification is a simple combination of matching and unification defined as follows: given two terms s and t, do there exist substitutions sigma and rho such that ssigmarho = tsigma? We present two algorithms for this problem based on Huet's unification closure method, one producing (possibly) non-principal solutions, and one producing principal solutions. For both we provide a precise analysis of correctness and asymptotic complexity. Under the uniform cost RAM model (counting assignment, comparison, and arithmetic operations as primitive) our first algorithm is asymptotically as fast as Huet's method, O(nalpha(n)), where alpha is the functional inverse of Ackermann's function. Under a model which counts assignments and comparisons of pointers, and arithmetic operations on bits, the cost is O(n(2)alpha(n)(2)). Producing principal solutions is more complex, however, and our second algorithm runs in O(n(2)alpha(n)(2)) and O(n(2) log(2)(nalpha(n)) log log(nalpha(n))alpha(n)(2)) under these two models. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Veracruz PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods;Mathematics, Applied U5 - J;Article AV - English IS - 0747-7171 UR - ISI:000220651900003 L2 - semi-unification;algorithms SO - Journal of Symbolic Computation 2004 ;37(4):455-484 11866 UI - 4709 AU - Olivares JC AU - Escarela-Perez R AU - Kulkarni SV AU - de Leon F AU - Venegas-Vega MA AD - Univ Autonoma Metropolitana, Dept Energia, Mexico City 02200, DF, MexicoInst Tecnol Super Zapopan, El Bajio 45019, Jalisco, MexicoIndian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, IndiaUniv Michoacana, Fac Ingn Elect, Div Estudios Postgrado, Morelia 58030, Michoacan, MexicoEscarela-Perez, R, Univ Autonoma Metropolitana, Dept Energia, Av San Pablo 180,Col Reynosa, Mexico City 02200, DF, Mexico TI - 2D finite-element determination of tank wall losses in pad-mounted transformers AB - This paper presents a two-dimensional (2D) finite-element (FE) analysis of losses generated in the tank wall surrounding the high-current bushings of pad-mounted transformers. Although the problem is truly three-dimensional (3D), it is shown that a 2D approach gives results that closely agree with 3D simulations and experimental results. Thus, it is possible to avoid the very demanding computational resources required for 3D modeling or the cost of experiments. Nine cases are analyzed to study the impact of inserting small plates of different geometry (located near the high-current terminals) on the reduction of tank losses. Significant reductions in stray losses on the tank wall are obtained with low-cost plate inserts. 2D and 3D time-harmonic FE models are used to determine the losses in the tank wall. Two load loss tests were carried out on experimental transformers to validate the simulations. (C) 2004 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Michoacan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0378-7796 UR - ISI:000223212900010 L2 - stray transformer losses;tank wall losses;low-voltage conductor;pad-mounted transformer;stainless-steel plate;finite element method SO - Electric Power Systems Research 2004 ;71(2):179-185 11867 UI - 5053 AU - Olivares JC AU - Escarela-Perez R AU - Kulkarni SV AU - de Leon F AU - Melgoza-Vasquez E AU - Hernandez-Anaya O AD - Inst Tecnol Super Zapopan, Zapopan 45019, MexicoUniv Autonoma Metropolitana Azcapotzalco, Dept Energia, Mexico City 02200, DF, MexicoIndian Inst Technol, Dept Elect Engn, Bombay 400076, Maharashtra, IndiaCYME Int, St Bruno, PQ, CanadaInst Tecnol Morelia, Morelia, Michoacan, MexicoOlivares, JC, Inst Tecnol Super Zapopan, Zapopan 45019, Mexico TI - Improved insert geometry for reducing tank-wall losses in pad-mounted transformers AB - This paper presents a numerical analysis of losses generated in the tank-wall surrounding the high-current bushings of pad-mounted transformers using a three-dimensional (3-D) finite-element approach. Two cases are analyzed to study the impact of inserting small plates of different geometry (located near the high-current phases) on the reduction of tank losses. Significant reductions in stray losses occurring in the tank wall are obtained with plate inserts of low-cost. With the "T" configuration proposed in this paper, we reduce the tank-wall losses by a factor of 1/21 at rated current when compared with the case of tank wall without the stainless-steel plate. A 3-D time-harmonic finite-element model is used to determine the losses in the tank wall. Two load loss tests were carried out on experimental transformers to validate the simulations and effectiveness of the low-cost inserts MH - Canada MH - India MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Jalisco PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000222429300030 L2 - finite-element method;low-voltage conductor;pad-mounted transformer;stainless-steel plate;stray losses;tank-wall losses;EDDY CURRENTS; LOAD SO - Ieee Transactions on Power Delivery 2004 ;19(3):1120-1126 11868 UI - 5041 AU - Olivas A AU - Camacho A AU - Yacaman MJ AU - Fuentes S AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Texas, Dept Chem Engn, Austin, TX 78712, USAOlivas, A, UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Nickel-tungsten bimetallic sulfide nanostructures of fullerene type AB - Bimetallic NiW sulfide nanostructures of the inorganic fullerene-like (IF-like) type were prepared by a chemical method employing ammonium thiotungstate and nickel nitrate as metal-sulfide precursors followed by sulfidation in H2S/H-2 at 400 degreesC. The nanostructures were grown with a Ni excess, at an atomic ratio R = 0.85 (R = Ni/Ni + W). The x-ray diffraction patterns showed poorly crystalline WS2, WO2, NiS, and Ni9S8 phases. High-resolution electron microscopy micrographs revealed the formation of two fullerene-like nanostructures, nickel sulfide nanoparticles and long nanotubes filled with tungsten suboxide, both coated by several WS2 layers. The surface area of 18 m(2)/g measured by nitrogen adsorption (BET surface-area) revealed that these materials contained micropororosity MH - Mexico|Baja California MH - USA PB - WARRENDALE: MATERIALS RESEARCH SOCIETY RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0884-2914 UR - ISI:000222418200033 L2 - RAY-ABSORPTION SPECTROSCOPY; SCANNING PROBE MICROSCOPY; IN-SITU ACTIVATION; WS2 NANOTUBES; AMMONIUM TETRATHIOMOLYBDATE; THERMAL-DECOMPOSITION; CATALYTIC PROPERTIES; CRYSTALLINE PHASES; NIMO SULFIDES; MOS2 SO - Journal of Materials Research 2004 ;19(7):2176-2184 11869 UI - 4331 AU - Olivas RR AU - Sandez OR AU - Haard NF AU - Aguilar RP AU - Brauer JME AD - Univ Sonora, Dept Invest & Posgrad Alimentos, Col Ctr Hermosillo 83000, Sonora, MexicoUniv Calif Davis, Inst Marine Resources, Dept Food Sci & Technol, Davis, CA 95616, USACtr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoBrauer, JME, Univ Sonora, Dept Invest & Posgrad Alimentos, Blvd Luis Encinas & Rosales S-N,Apdo Postal 1658, Col Ctr Hermosillo 83000, Sonora, Mexico TI - Changes in firmness and thermal behavior of ice-stored muscle of jumbo squid (Dosidicus gigas) AB - Changes in firmness, muscle total protease activity, and the thermal behavior of jumbo squid (Dosidicus gigas) were measured throughout 15 days of ice-storage. A significant decrease (p<0.05) in the shear force of raw mantle muscle was observed after 7-days ice-storage. The highest total protease activity detected was 1.24 U/g mantle. The thermograms obtained at day zero showed four transition states. The first three transition states were endothermic and correspond to myosin (50&DEG;C), sarcoplasmic proteins (69&DEG;C), and actin (79&DEG;C). The fourth transition state was exothermic at 107&DEG;C, and was probably associated with protein aggregation. The thermal behavior of the muscle showed a decreasing trend in temperature and enthalpy of transition for myosin, sarcoplasmic proteins, and actin with storage time. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis showed a change in the myofibrillar protein pattern, which with the shear force, and differential scanning calorimetry data, suggests a partial denaturation of that protein fraction during ice-storage MH - Mexico|Sonora MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1438-2377 UR - ISI:000224250300001 L2 - squid;thermal denaturation;shear force;MYOFIBRILLAR PROTEINS; ILLEX-ARGENTINUS; MANTLE MUSCLE; DENATURATION; AUTOLYSIS SO - European Food Research and Technology 2004 ;219(4):312-315 11870 UI - 5058 AU - Oliveira MF AU - Seixas W AU - Gomez-Puyou A AU - de Gomez-Puyou MT AU - Moreno-Sanchez R AU - De Felice FG AU - de Meis L AU - Galina A AD - Univ Fed Rio de Janeiro, Dept Bioquim Med, Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Ctr Invest Fisiol Celular, Mexico City 04510, DF, MexicoInst Cardiol, Mexico City, DF, Mexico TI - Functional role of mitochondria bound hexokinase activity: Steady-state ADP formation as a regulatory mechanism of membrane potential and reactive oxygen species generation in mitochondria MH - Brazil MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0891-5849 UR - ISI:000221320200184 SO - Free Radical Biology and Medicine 2004 ;36():S73-S74 11871 UI - 4161 AU - Oliver-Salvador MC AU - Gonzalez-Ramirez LA AU - Gavira JA AU - Soriano-Garcia M AU - Garcia-Ruiz JM AD - Univ Granada, CSIC, Lab Estudios Cristalog, Granada, SpainIPN, Unidad Profes Interdisciplinaria Biotecnol, Mexico City 07738, DF, MexicoUNAM, Inst Quim, Mexico City, DF, MexicoGarcia-Ruiz, JM, Univ Granada, CSIC, Lab Estudios Cristalog, Granada, Spain TI - Purification, crystallization and preliminary X-ray analysis of mexicain AB - Mexicain is a 23.7 kDa papain-like cysteine protease from the tropical plant Jacaratia mexicana. Extracted as a mix of proteases from the latex of the fruit, mexicain is isolated after canon-exchange chromatography as the most abundant product. The purified product inhibited with E-64 was crystallized by sitting-drop vapour diffusion in the presence of ethanolamine. Cryoprotected crystals diffracted X-rays from a home source to 1.98 Angstrom and belong to the monoclinic space group P2(1), with unit-cell parameters a=57.36, b=90.45, c=80.39 Angstrom, P=92.64. The asymmetric unit contains four molecules of mexicain, with a corresponding crystal volume per protein weight (V-M) of 2.24 Angstrom(3) Da(-1) and a solvent content of 45% by volume. A molecular-replacement model has been determined and refinement is in progress MH - Mexico|Distrito Federal MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biophysics;Crystallography U5 - J;Article AV - English IS - 0907-4449 UR - ISI:000224595200029 L2 - CYSTEINE PROTEASES; CRYSTAL-STRUCTURE; PROTEINS; PAPAYA SO - Acta Crystallographica Section D-Biological Crystallography 2004 ;60():2058-2060 11872 UI - 4950 AU - Omidi N AU - Blanco-Cano X AU - Russell CT AU - Karimabadi H AD - Univ Calif San Diego, La Jolla, CA 92093, USAUniv Nacl Autonoma Mexico, Inst Geofis, Coyoacan 04510, DF, MexicoUniv Calif Los Angeles, Los Angeles, CA 92093, USAOmidi, N, Univ Calif San Diego, MC 0407, La Jolla, CA 92093, USA TI - Dipolar magnetospheres and their characterization as a function of magnetic moment AB - Results of two-dimensional (2-D), hybrid (fluid electrons, kinetic ions) simulations of solar wind interaction with a magnetic dipole are presented. This interaction leads to a number of distinct magnetospheres, as the strength of the dipole changes. Both the size and level of complexity of these magnetospheres increases with the dipole moment. A physical parameter which helps characterize these magnetospheres is D-p, the distance ahead of the dipole where the magnetic field pressure balances the solar wind ram pressure. Expressed in units of ion skin depth, when D-p similar to 0.05 the interaction results in the formation of a phase standing whistler wake with no change in solar wind velocity or density. When D-p similar to 0.15, two additional wakes corresponding to the fast and slow magnetosonic modes are also generated. These two wakes are associated with the formation of a plasma tail, however, no appreciable pile up is observed upstream of the dipole. As D-p approaches 1, a region of plasma pile up is formed resulting in the formation of a fast magnetosonic bow wave standing upstream of the dipole. At the same time, a slow magnetosonic wake is present in the tail region which separates a slower, cooler plasma from a faster and hotter one in the central tail region. Results of test particle calculations suggest that ion acceleration near the dipole is the main source of this plasma. Finally, when D-p similar to 20 the resulting magnetosphere has many characteristics similar to those of the Earth and other magnetized planets. (C) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - KIDLINGTON: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000222529400018 L2 - dipolar magnetospheres;solar wind;magnetic moment;SOLAR-WIND SO - Comparative Magnetospheres 2004 ;33(11):1996-2003 11873 UI - 4243 AU - Onate-Ocana LF AU - Montesdeoca R AU - Lopez-Graniel CM AU - iello-Crocifoglio V AU - Mondragon-Sanchez R AU - Cortina-Borja M AU - Herrera-Goepfert R AU - Oros-Ovalle C AU - Gallardo-Rincon D AD - Inst Nacl Cancerol, Dept Gastroenterol, Div Surg, Mexico City 14080, DF, MexicoInst Nacl Cancerol, Dept Pathol, Mexico City 14080, DF, MexicoInst Nacl Cancerol, Dept Med Oncol, Div Internal Med, Mexico City 14080, DF, MexicoUniv Coll London, Inst Child Hlth, Ctr Paediat Epidemiol & Biostat, London, EnglandOnate-Ocana, LF, Inst Nacl Cancerol, Dept Gastroenterol, Div Surg, San Fernando 22, Mexico City 14080, DF, Mexico TI - Identification of patients with high-risk lymph node-negative colorectal cancer and potential benefit from adjuvant chemotherapy AB - Background: Adjuvant chemotherapy is not indicated in lymph node-negative colorectal adenocarcinoma (CRC), even though some cases will present recurrent disease. It is important to identify a subgroup of patients with the highest risk of relapse because of the potential benefit of adjuvant chemotherapy. The objective of this study is to define the prognostic factors and describe a method for the selection of this subgroup. Methods: A retrospective cohort of 124 patients with lymph node-negative CRC with complete surgical resection was studied. Cox's proportional hazards model was used to define the prognostic factors associated with CRC-related survival and to develop a method for prediction of recurrence probability. Results: The cohort included 62 women and 62 men with mean age 55.8 years. The mean follow-up period was 11.7 years. T classification of the primary tumor, differentiation grade, carcinoembryonic antigen level, gender and the presence of neural invasion were significant prognostic factors according to the multivariate analysis (final model P = 0.00001). Using risk ratios for these prognostic factors, we defined a high-risk group of 78 patients and a low-risk group of 46 patients with 24 and 5 recurrences, respectively (recurrence rates of 30.8% and 10.9% respectively, P = 0.011). Conclusions: Using these factors, a prognostic scale was developed to predict high risk of recurrence in cases of completely resected CRC and to identify them as a subgroup of patients with potential benefit of adjuvant chemotherapy MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Oncology U5 - J;Article AV - English IS - 0368-2811 UR - ISI:000224213700005 L2 - colorectal adenocarcinoma;adjuvant chemotherapy;lymph node-negative;recurrent disease;prognostic factors;FLUOROURACIL PLUS LEVAMISOLE; COLON-CANCER; RECTAL-CANCER; DUKES-B; THERAPY; SURVIVAL; MICROMETASTASES; CARCINOMAS; RESECTION SO - Japanese Journal of Clinical Oncology 2004 ;34(6):323-328 11874 UI - 5700 AU - Onore G AU - Moron MA AD - Pontificia Univ Catalica Ecuador, Dept Biol, Quito, EcuadorInst Ecol, Dept Entomol, Xalapa 91000, Veracruz, MexicoOnore, G, Pontificia Univ Catalica Ecuador, Dept Biol, Apartado 17-01-2184, Quito, Ecuador TI - Dynastes neptunus Quenzel (Coleoptera : Scarabaeidae : Dynastinae); Descriptions of the third instar larva and pupa, with notes on biology AB - The third instar larva and pupa of Dynastes neptunus Quenzel are described using 15 specimens collected in Cotopaxi, Ecuador. Drawings of the diagnostic structures, notes on the biology of this species and a key to the known third instar larvae of the genus Dynastes are included MH - Ecuador MH - Mexico|Veracruz PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000220808700015 SO - Coleopterists Bulletin 2004 ;58(1):103-110 11875 UI - 4559 AU - onso-Spilsbury M AU - Mota-Rojas D AU - Martinez-Burnes J AU - Arch E AU - Mayagoitia AL AU - Ramirez-Necoechea R AU - Olmos A AU - Trujillo ME AD - Univ Autonoma Metropolitana Xochimilco, Dept Prod Agr & Anim, Area Invest, Ecodesarrollo Prod Anim, Mexico City 04960, DF, MexicoNatl Autonomous Univ Mexico, Fac Med Vet & Zootecn, Dept Cerdos, Mexico City 04510, DF, MexicoUniv Autonoma Tamaulipas, Fac Med Vet & Zootecn, Div Estudios Posgrado & Invest, Tamaulipas 87000, MexicoInst Nacl Comun Humana, Div Invest, Mexico City 01480, DF, MexicoUniv Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaAlonso-Spilsbury, M, Univ Autonoma Metropolitana Xochimilco, Dept Prod Agr & Anim, Area Invest, Ecodesarrollo Prod Anim, Calz Hueso 1100,Col Villa Quietud, Mexico City 04960, DF, Mexico TI - Use of oxytocin in penned sows and its effect on fetal intra-partum asphyxia AB - The objective of the present study was to evaluate in penned sows the effect of two commercial oxytocin products on umbilical cord pathology, degree of asphyxia and intra-partum mortality. This study included 120 sows divided in three groups of 40 animals with eight animals for parities one to five per subgroup, respectively. Group 1 (G(1)) or control received saline solution while oxytocin groups (G(2)) and (G(3)) were injected at the onset of fetal expulsion with two oxytocin products. The doses of oxytocin were as follow: Primiparous sows weighing less than 130 kg received 20 IU; multiparous sows weighing 130-180 kg received 30 IU, and those above 250 kg, 40 IU. Piglets born alive and/or dead were classified at birth using a subjective scale based on the degree of meconium staining on skin. Umbilical cords of intra-partum stillbirths (IPS) were classified as adhered or ruptured and subdivided into four categories: without pathological changes, edematous, congested and hemorrhagic. Result analyses revealed significant differences (P < 0.01) between groups 1 and 2, and 1 and 3 regarding the following traits: expulsion interval (min) (X: G(1) 27.7; G(2) 22.6; G(3) 22.2), IPS with a severe stain degree (X: G(1) 0.10; G(2) 0.45; G(3) 0.50), IPS with ruptured umbilical cords (X: G(1) 0.07; G(2) 0.42; G(3) 0.47), and detectable heartbeats in IPS (X: G(1) 0.27; G(2) 0.25; G(3) 0.22). Treatment with oxytocin reduced the duration of the expulsion of the fetus, increased the number of IPS with ruptured umbilical cords and with severe meconium-stain degree and reduced the number of fetuses with inspiration attempts. Furthermore, the use of this hormone increased the need for obstetric assistance due to increased frequency of dystocia. (C) 2004 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology U5 - J;Article AV - English IS - 0378-4320 UR - ISI:000223569500013 L2 - pigs;oxytocin;farrowing;stillborn;asphyxia;meconium;REPRODUCTIVE PERFORMANCE; PERINATAL MORTALITY; PARTURITION; SWINE; INDUCTION; PIG; STILLBIRTHS; MYOMETRIAL; MANAGEMENT; VIABILITY SO - Animal Reproduction Science 2004 ;84(1-2):157-167 11876 UI - 6423 AU - Ordonez M AU - De la Rosa VG AU - Alcudia F AU - Llera JM AD - Univ Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Sevilla, Fac Farm, Dept Quim Organ & Farmaceut, E-41071 Seville, SpainOrdonez, M, Univ Autonoma Estado Morelos, Ctr Invest Quim, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Diels-Alder reaction of optically active (E)-gamma-keto-alpha,beta-unsaturated p-tolyisulfoxides with cyclopentadiene AB - The Diels-Alder reaction of enantiomerically pure (E)-gamma-keto-alpha,beta-unsaturated p-tolylsulphoxides 3 with cyclopentadiene give four easily separable diastereomers. The effect of several Lewis acids on the reaction was studied, finding a high endo selectivity with respect to the carbonyl group and moderate pi-diastereoselectivity using (BF3Et2O)-Et-. as catalyst. The reactivity of compounds 3 as well as their endo selectivity are both higher than those observed for the corresponding (E)-3-sulfinylacrylates. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000188227400007 L2 - (E)-gamma-Keto-alpha,beta-unsaturated p-tolylsulphoxides;Diels-Alder reactions;CHIRAL KETENE EQUIVALENT; S-OXIDES; SULFOXIDES SO - Tetrahedron 2004 ;60(4):871-875 11877 UI - 5263 AU - Orea P AU - Duda Y AU - Weiss VC AU - Schroer W AU - Alejandre J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoNAS Ukraine, Inst Condensed Matter Phys, UA-11 Lvov, UkraineKatholieke Univ Leuven, Vaste Stoffys & Magnetisme Lab, B-3001 Louvain, BelgiumUniv Bremen, Inst Anorgan & Phys Chem, D-28359 Bremen, GermanyAlejandre, J, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Av San Rafael Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Liquid-vapor interface of square-well fluids of variable interaction range AB - Properties of the liquid-vapor interface of square-well fluids with ranges of interaction lambda = 1.5, 2.0, and 3.0 are obtained by Monte Carlo simulations and from square-gradient theories that combine the Carnahan-Starling equation of state for hard spheres with the second and third virial coefficients. The predicted surface tensions show good agreement with the simulation results for lambda = 2 and for lambda = 3 in a temperature range reasonably close to the critical point, 0.8 less than or equal to T/T-c less than or equal to 0.95. As expected, the surface tension increases with the range of interaction and decreases monotonically with temperature. A comparison between theory and simulation results is also given for the width of the interface and for the coexistence curves for the different interaction ranges. (C) 2004 American Institute of Physics MH - Belgium MH - Germany MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 9 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000221907800048 L2 - RESTRICTED PRIMITIVE MODEL; CRITICAL-BEHAVIOR; SURFACE-TENSION; IONIC FLUIDS; WIDTH; SIMULATION; EQUILIBRIUM; EXPANSION; ENSEMBLE SO - Journal of Chemical Physics 2004 ;120(24):11754-11764 11878 UI - 4083 AU - Orlov Y AU - Aguilar L AD - Mexican Sci Res & Adv Studies Ctr CICESE, Dept Elect & Telecommun, San Diego, CA 92143, USACtr Invest & Desarrollo Tecnol Digital CITEDI IPN, Mesa De Otay, Tijuana, MexicoOrlov, Y, Mexican Sci Res & Adv Studies Ctr CICESE, Dept Elect & Telecommun, POB 434944, San Diego, CA 92143 USA TI - Non-smooth H-infinity-position control of mechanical manipulators with frictional joints AB - Non-smooth H-infinity-control synthesis is developed and applied to a regulation problem for mechanical manipulators with friction. Due to the nature of the approach, the resulting regulator additionally yields the desired robustness properties against the discrepancy between the real friction and that described in the model. To facilitate exposition, the friction model chosen for treatment is confined to the Dahl model augmented with viscous friction. Performance issues of the nonsmooth H-infinity-regulator are illustrated in an experimental study made for a three degrees-of-freedom robot manipulator MH - USA MH - Mexico|Baja California PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 0020-7179 UR - ISI:000224677300007 L2 - ROBOT MANIPULATORS; DISTURBANCE ATTENUATION; MEASUREMENT FEEDBACK; NONLINEAR-SYSTEMS; ADAPTIVE-CONTROL; ROBUST-CONTROL SO - International Journal of Control 2004 ;77(11):1062-1069 11879 UI - 5691 AU - Orozco-Lugo AG AU - McLernon D AD - IPN, Secc Comun, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoUniv Leeds, Sch Elect & Elect Engn, Inst Integrated Informat Syst, Leeds LS2 9JT, W Yorkshire, EnglandOrozco-Lugo, AG, IPN, Secc Comun, Ctr Invest & Estudios Avanzados, Mexico City, DF, Mexico TI - Blind channel equalization using chirp modulating signals AB - This paper addresses the problem of blind channel equalization in the context of digital communications. Recent results have shown that certain operations applied to the source signal at the transmitter help in the blind identification and equalization of the channel at the receiver. In this paper, the baseband data signal is multiplied with a chirp sequence. Exploiting certain structural properties arising from this operation, a batch-type algorithm is obtained for calculating the equalizer's coefficients. Conditions on the chirp sequence parameters are obtained that guarantee an equalization solution. A low-complexity adaptive algorithm is also proposed. Finally, extensive simulations, and comparisons with other well-known blind techniques, illustrate the excellent performance of this algorithm MH - United Kingdom MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1053-587X UR - ISI:000220808600022 L2 - antenna arrays;blind equalization;chirp signals;cyclostationarity;DISCRETE-VALUED SIGNALS; INDUCED CYCLOSTATIONARITY; FIR CHANNELS; IDENTIFICATION; SUBSPACE; SEQUENCES; ALGORITHM; FILTERS SO - Ieee Transactions on Signal Processing 2004 ;52(5):1364-1375 11880 UI - 6625 AU - Orozco-Lugo AG AU - Lara MM AU - McLernon DC AD - CINVESTAV IPN, Secc Comun, Mexico City 07360, DF, MexicoUniv Leeds, Sch Elect & Elect Engn, Inst Integrated Informat Syst, Leeds LS2 9JT, W Yorkshire, EnglandOrozco-Lugo, AG, CINVESTAV IPN, Secc Comun, CP 07360, Mexico City 07360, DF, Mexico TI - Channel estimation using implicit training AB - In this paper, a new method to perform channel estimation is presented. It is shown that accurate estimation can be obtained when a training sequence is actually arithmetically added to the information data as opposed to being placed in a separate empty time slot: hence, the word "implicit." A closed-form solution for the estimation variance is derived, as well as the Cramer-Rao lower bound. Conditions are derived for the training sequences that result in a channel estimation performance that is independent of the channel characteristics. In addition, estimation performance is shown to be independent of the modulation format. A procedure to synthesize optimal training sequences is presented, and the problem of synchronization is solved. The performance of the algorithm is then compared with other methods that use explicit training under GSM-like environmental conditions, and the new algorithm is shown to be competitive with these. Finally, comparisons are also carried out against blind methods over realistic band-limited channels, and these show that the new method exhibits good performance MH - United Kingdom MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1053-587X UR - ISI:000187434500021 L2 - channel estimation;cyclostationarity;equalization;synchronization;BLIND IDENTIFICATION; EIGENVECTOR ALGORITHM; EQUALIZATION; STATISTICS; SYSTEMS SO - Ieee Transactions on Signal Processing 2004 ;52(1):240-254 11881 UI - 6337 AU - Orozco AL AU - Maji AK AD - Univ Autonoma Chihuahua, Fac Ingn, Chihuahua 31160, MexicoUniv New Mexico, Dept Civil Engn, Albuquerque, NM 87131, USA, USAF, Res Lab, VSSV, Kirtland AFB, NM 87117 USAOrozco, AL, Univ Autonoma Chihuahua, Fac Ingn, Apartado Postal 1528 Suc C Chihuahua, Chihuahua 31160, Mexico TI - Energy release in fiber-reinforced plastic reinforced concrete beams AB - A set of 30 concrete beams reinforced with carbon/epoxy FRP (fiber-reinforced plastic) and four reinforced with comparable size steel rebars were subjected to static bending tests. Adequate bond between the FRP and the concrete was obtained, due to the use of carbon fiber overwrap on the smooth pultruded FRP rods. With adequate bond, the large strain to failure (>2%) of the FRP determines the ductility and failure mode of the FRP reinforced beams. An analytical evaluation of the fracture energy in these experiments shows that there is ductility due to the large fraction of the total strain energy that is absorbed in the concrete, because of the formation of distributed cracking. Variations in overwrap configuration, addition of steel stirrups, addition of polypropylene fibers, and comparison with four beams reinforced with equivalent steel reinforcement were also analyzed MH - Mexico|Chihuahua MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Civil;Mechanics;Materials Science, Composites U5 - J;Article AV - English IS - 1090-0268 UR - ISI:000188535500007 L2 - energy dissipation;beams;concrete;reinforced;ductility;fiber-reinforced plastics;structural reinforcement SO - Journal of Composites for Construction 2004 ;8(1):52-58 11882 UI - 5386 AU - Ortega-Gutierrez F AU - Solari LA AU - Sole J AU - Martens U AU - Gomez-Tuena A AU - Moran-Ical S AU - Reyes-Salas M AU - Ortega-Obregon C AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv San Carlos, Ctr Univ Norte, Goban, GuatemalaUNAM, Ctr Geociencias, Juriquilla, Queretaro, MexicoOrtega-Gutierrez, F, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Polyphase, high-temperature eclogite-facies metamorphism in the Chuacus Complex, Central Guatemala: Petrology, geochronology, and tectonic implications AB - This paper describes the first discovery of eclogite-facies rocks in the Paleozoic Chuacus basement complex of north-central Guatemala. In this area, the complex comprises a thick, polydeformed sequence of high-Al metapelite, amphibolite, and quartzofeldspathic banded gneisses and schists characterized by garnet, phengite, and kyanite. Detailed petrographic, electronprobe microanalyses, and a late Carboniferous U-Pb zircon apparent age indicate that this deeply rooted orogenic terrane may be related to the Alleghenian suturing between Gondwana and Laurentia. Eclogite-facies metamorphism is established by assemblages with omphacite-garnet-rutile phengite +/- zoisite in mafic rocks, which are consistent with garnet-kyanite-zoisite-rutile-quartz-phengite +/- staurolite +/- chloritoid assemblages in pelitic rocks, and amphibole-calcite/dolomite/aragonite?-rutile-quartz-zoisite +/- clinocblorc +/- diopside in marbles. Moreover, various textural and mineralogical features such as radial cracks in garnet and kyanite around quartz inclusions, palisade-like coronas of a silica mineral around (quartz in some carbonates; lamellar inclusions of a titaniferous phase in garnet, zoisite, and phengite; and plagioclase or white mica in some omphacite; as well as the relatively high Na2O content of garnet [up to 0.12 wt%]), suggest relict ultrahigh-pressure metamorphism (UHPM). These conditions predated high-temperature-high-pressure hydration and decompression melting that occurred between 18 and 23 kbar and 700-770degreesC. This decompressional melting event of eclogitic rocks is dated as late Carboniferous by U-Pb on discordant zircons from a leucocratic neosome, and may be associated with the initial closure of Pangea. K-Ar ages of similar to70-75 Ma on micas and amphibole, stable at 14 kbar and 597degreesC, are interpreted to record the Cretaceous obduction of Caribbean ophiolites and arc assemblages onto the Chuacus complex and the southern edge of the Maya block, along the paleo-Motagua fault zone MH - Guatemala MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 3 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000221684300005 L2 - ULTRAHIGH-PRESSURE METAMORPHISM; MOTAGUA FAULT ZONE; WESTERN TIANSHAN; EXPERIMENTAL CALIBRATION; MINERAL CHEMISTRY; CARIBBEAN REGION; SOUTHERN MEXICO; DABIE MOUNTAINS; EASTERN CHINA; ZIRCON AGES SO - International Geology Review 2004 ;46(5):445-470 11883 UI - 6574 AU - Ortega-Huerta MA AU - Peterson AT AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 28000, DF, MexicoNat Hist Museum, Lawrence, KS 66045, USABiodivers Res Ctr, Lawrence, KS 66045, USAOrtega-Huerta, MA, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 10, Mexico City 28000, DF, Mexico TI - Modelling spatial patterns of biodiversity for conservation prioritization in North-eastern Mexico AB - Relationships between spatial patterns of bird and mammal species richness in north-eastern Mexico were analysed in relation to the location of three biosphere reserves (El Abra-Tanchipa, El Cielo, and Sierra Gorda) and 13 priority areas recently identified for conservation. Ecological niches were modelled and potential distributions delimited for 285 bird and 114 mammal species using a genetic algorithm based on locality information from museum specimens and 15 selected environmental attributes. Potential distributions were transformed into hypothesized current distributions based on species-habitat associations as reflected in a recent land-use map. Although species richness was lower when distributions were reduced from potential to current, spatial patterns of potential and current richness were similar. Heuristic, complementarity-based prioritization procedures were used to identify combinations of areas and sites with maximal species representation: the biosphere reserves included 79% of birds and 74% of mammal species; eight priority areas provided an additional 11% of birds and 13% of mammals; the remaining 10% of birds and 13% of mammals were concentrated in new sites across the study area MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 20 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1366-9516 UR - ISI:000187849400005 L2 - biodiversity;biosphere reserves;North-eastern Mexico;prioritization;spatial patterns;species richness;GEOGRAPHIC ANALYSIS; RESERVE NETWORKS; HOTSPOTS; AREAS; DISTRIBUTIONS; POPULATIONS; ALGORITHMS; DIVERSITY; RICHNESS; BIRDS SO - Diversity and Distributions 2004 ;10(1):39-54 11884 UI - 2927 AU - Ortega-Leon G AU - Thomas DB AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUSDA ARS, Weslaco, TX 78596, USAOrtega-Leon, G, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Two new species of Stalius Rolston (Heteroptera : Pentatomidae : Ochlerini) from central America AB - Two new species of Stalius are described from Guatemala and Costa Rica. The new species are illustrated and a key provided to separate the members of the genus MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NEW YORK ENTOMOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0028-7199 UR - ISI:000227410500010 L2 - Stalius;Pentatomidae;stinkbug;taxonomy SO - Journal of the New York Entomological Society 2004 ;112(2-3):190-197 11885 UI - 5467 AU - Ortega-Rodriguez A AU - Duda Y AU - Guevara-Rodriguez F AU - Lira-Galeana C AD - Inst Mexicano Petr, Branch R&D Deep Water E&P, Mexico City 07730, DF, MexicoInst Mexicano Petr, Branch Mol Engn Res, Mexico City 07730, DF, MexicoNatl Acad Sci Ukraine, Inst Condensed Matter Phys, UA-79011 Lvov, UkraineLira-Galeana, C, Inst Mexicano Petr, Branch R&D Deep Water E&P, Apartado Postal 14-805, Mexico City 07730, DF, Mexico TI - Stability and aggregation of asphaltenes in asphaltene-resin-solvent mixtures AB - The Integral Equation Theory (IET) of fluids and molecular dynamics (MD) simulations have been used to study the stability and aggregation of asphaltenes in asphaltene-resin mixtures with different host solvents (n-heptane, toluene, and pyridine). The theory is based on an approximate interaction-potential model that represents the asphaltene-asphaltene (A-A), asphaltene-resin (A-R), and resin-resin (R-R) interactions in a solvent of dielectric constant c. This interaction potential is used within the Ornstein-Zernike Hypernetted Chain (OZ-HNC) approximation for calculating radial distribution functions, structure factors, the limits of material stability, and the phase diagrams of asphaltene-containing systems, where the peptizing behavior of resins is studied as a function of the ratio of resin-to-asphaltene molecules in each host solvent. Comparisons of the theoretical OZ-HNC and MD simulations confirm the good accuracy of the proposed approach, which suggests its suitability as an alternative calculation method for predicting the phase behavior of asphaltene-containing oil fluids MH - Mexico|Distrito Federal MH - Ukraine PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000221588300011 L2 - MOLECULAR RECOGNITION; MECHANICS; PRESSURE; ENERGY SO - Energy & Fuels 2004 ;18(3):674-681 11886 UI - 6047 AU - Ortega J AU - Lopez-Hernandez A AU - Garcia HS AU - Hill CG AD - UNIDA Inst Tecnol Veracruz, Veracruz 91897, MexicoUniv Wisconsin, Dept Chem Engn, Madison, WI 53706, USAGarcia, HS, UNIDA Inst Tecnol Veracruz, MA de Quevedo 2779, Veracruz 91897, Mexico TI - Lipase-mediated acidolysis of fully hydrogenated soybean oil with conjugated linoleic acid AB - Interesterification (acidolysis) of fully hydrogenated soybean oil (melting point = 69.9 degreesC) with conjugated linoleic acid (CLA) was carried out in a batch reactor at 75 degreesC. Lipases from Candida antarctica, Rhizomucor miehei, Pseudomonas sp., and Thermomyces lanuginosus were used at 5% (wt/wt) of the total substrate load. The lipase from Rhizomucor miehei produced the fastest reaction rates, and the greatest extent of incorporation of CLA residues in acylglycerols was achieved in 12 h. Lipases from C. antarctica and T lanuginosus produced slower initial rates, and maximum extents of incorporation of CIA residues were achieved in 24 h. The lipase from Pseudomonas sp. produced the slowest initial rate. The corresponding maximum extent of incorporation was reached in 48 h. Differential scanning calorimetry analysis of the triacylglycerol (TAG) fractions produced by C. antarctica, R. miehei, and T lanuginosus lipases after purification by solid phase extraction showed little variation in melting point (60.4 degreesC, 62.8 degreesC, and 60.1 degreesC, respectively). By contrast, the corresponding TAG fraction produced by the Pseudomonas sp. lipase melted at 48.4 degreesC. The positional distribution of the TAGs produced by the lipase from Pseudomonas sp. differed appreciably from those produced by the other enzymes MH - Mexico|Veracruz MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000220142100030 L2 - soybean oil;linoleic acid;lipase;interesterification;acidolysis;SCANNING CALORIMETRIC ANALYSIS; ENZYMATIC INTERESTERIFICATION; STRUCTURED LIPIDS; FATTY-ACIDS; MILK-FAT; CATALYZED INTERESTERIFICATION; POSITIONAL DISTRIBUTION; DIENOIC DERIVATIVES; IMMOBILIZED LIPASE; CANCER PREVENTION SO - Journal of Food Science 2004 ;69(1):E1-E6 11887 UI - 6022 AU - Ortega MJ AU - Zubia E AU - Sanchez MC AU - Salva J AU - Carballo JL AD - Univ Cadiz, Fac Ciencias Mar & Ambientale, Dept Quim Organ, Puerto Real 11510, Cadiz, SpainUNAM, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, MexicoZubia, E, Univ Cadiz, Fac Ciencias Mar & Ambientale, Dept Quim Organ, Aptdo 40, Puerto Real 11510, Cadiz, Spain TI - Structure and cytotoxicity of new metabolites from the sponge Mycale cecilia AB - The chemical study of the sponge Mycale cecilia has led to the isolation of 14 new pyrrole-containing metabolites. Mycalazals 3-13 are pyrrole-2-carbaldehydes possessing at C-5 hydrocarbon side chains of different length and/or number of unsaturations. Mycalenitriles 1-3 are 5-cyanoalkylpyrrole-2-carbaldehydes. The structures of the new compounds were established mainly by NMR and MS spectroscopic analysis. The location of the double bond in mycalazal-4, -8, and -11 was determined by MS analysis of the corresponding bis(methylthio) derivatives. Mycalazals have shown activity as growth inhibitors of several tumor cell lines, in particular the LNcaP cell line, being mycalazal-8 the most active metabolite. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Sinaloa MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000220035400007 L2 - natural products;sponges;pyrroles;structure determination;cytotoxicity;ZEALAND MARINE SPONGE; GENUS MYCALE; MYCALAMIDE-A; MYCALOLIDES; MACROLIDES; MAGELLANICA; ACID SO - Tetrahedron 2004 ;60(11):2517-2524 11888 UI - 5270 AU - Ortega N AU - de Diego S AU - Rodriguez-Nogales JM AU - Perez-Mateos M AU - Busto MD AD - Univ Burgos, Dept Biotechnol & Food Sci, Burgos 09001, SpainUniv Hidalgo State, Chem Res Ctr, Pachuca 42070, MexicoBusto, MD, Univ Burgos, Dept Biotechnol & Food Sci, Plaza Misael Banuelos S-N, Burgos 09001, Spain TI - Kinetic behaviour and thermal inactivation of pectinlyase used in food processing AB - Kinetic properties and thermal inactivation of pectinlyase (PL) were assayed in commercial pectinase preparations (Rapidase C80, Pectinase CCM, Pectinex 3XL and Grindamyl 3PA) by using apple pectin as substrate. The PL activity of Rapidase C80 showed substrate inhibition, while the other enzyme preparations followed typical Michaelis-Menten kinetics. The optimum pH and temperature values for PL activity lay within the range of 5.5-6.5 and 35-40 degreesC, respectively. PL was heat-inactivated with simple first order kinetics. With respect to this, thermodynamic activation parameters (DeltaH#, DeltaS# and DeltaG#) using a non-linear Arrhenius plot were calculated. The Pectinase CCM and Pectinex 3XL PL showed a half-life (t(1/2)) at 50 degreesC of 2.0 min and 11.8 min, respectively MH - Mexico|Hidalgo MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0950-5423 UR - ISI:000221957500005 L2 - enzyme inactivation kinetics;Michaelis constants;pectinase preparations;thermal stability;thermodynamic activation parameters;PENICILLIUM-ITALICUM; ENZYMATIC-ACTIVITIES; LYASE; PURIFICATION; ENZYMES; POLYGALACTURONASE; THERMOSTABILITY; DENATURATION; PECTINASES; ADDITIVES SO - International Journal of Food Science and Technology 2004 ;39(6):631-639 11889 UI - 5265 AU - Ortiz-Ibarra H AU - Medina JA AD - Univ Guadalajara, Dept Quim, Guadalajara 44420, Jalisco, MexicoMedina, JA, Seagate Technol, 7801 Comp Ave S, Bloomington, MN 55435, USA TI - Uniform thin film electrodeposition onto large circular wafer substrates AB - A wafer-scale electrochemical flow cell specially suited for uniform thin-film electrodeposition is presented. The cell consists of a porous disk injector set parallel and coaxial to a working disk electrode with a narrow separation gap between them. The porous injector was designed to supply a uniform axial flow of electrolyte onto the surface of the working disk electrode. The mass transfer characteristics of the cell and the current distribution on the working disk electrode were studied for various operating conditions, geometric parameters and bath chemistries. The experimental results confirmed the simple scaling properties that were theoretically predicted. It has also been shown that this cell can provide nearly uniform current distribution on the working electrode under conditions of both migration and convective-diffusive mass transfer control. The results indicate that this cell is suitable for uniform thin-film electrodeposition onto large circular wafer substrates MH - Mexico|Jalisco MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Electrochemistry U5 - J;Article AV - English IS - 0021-891X UR - ISI:000221930800012 L2 - paddle cell;uniform current distribution;uniform injection cell;wafer electroplating;THROUGH-MOLD ELECTRODEPOSITION; STEADY-STATE CHARACTERIZATION; INJECTION CELL; ALLOYS SO - Journal of Applied Electrochemistry 2004 ;34(7):751-756 11890 UI - 5462 AU - Ortiz-Navarrete V AU - Olvera-Gomez I AU - Pelayo-Camacho R AU - Limon A AD - CINVESTAV, Mexico City 07360, DF, MexicoOklahoma Med Res Fdn, Oklahoma City, OK 73104, USAIMSS, Puebla, Mexico TI - HCMV acute infection induces resistance to apoptosis mediated by CD95 and TNF alpha MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470701834 SO - Faseb Journal 2004 ;18(5):A1143-A1143 11891 UI - 6394 AU - Ortiz E AU - Luthy RG AU - Dzombak DA AU - Smith JR AD - ITESM, Dept Ingn Quim, Monterrey 64849, NL, MexicoAlcon Labs Inc, Alcoa Tech Ctr, Alcoa Ctr, PA 15069, USACarnegie Mellon Univ, Dept Civil & Environm Engn, Pittsburgh, PA 15213, USAStanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305, USAOrtiz, E, ITESM, Dept Ingn Quim, Sucursal de Correos J, Monterrey 64849, NL, Mexico TI - Release of polychlorinated to water under biphenyls from river sediment low-flow conditions: Laboratory assessment AB - The diffusive release of polychlorinated biphenyls (PCBs) from sediments to water under low-flow conditions was measured for surficial sediments with,different PCB concentrations collected from the Grasse River near Massena, N.Y. Data on PCB sediment-water equilibrium partitioning and PCB mass release flux from sediments were used to assess the extent and mass transfer rate of PCB release under low-flow conditions in the Grasse River. Microcosm studies were employed to evaluate the release flux of PCBs under quiescent conditions for various river sediments and sediment mixtures. The observed total-PCB release fluxes ranged from about I to 20. mg/m(2) year, showing predominantly dichloro- through tetrachlorobiphenyls. Analyses of water column samples from the Grasse River under low-flow conditions also indicated the predominance of dichloro- through tetrachlorobiphenyls as in the microcosm tests Data on PCB equilibrium partitioning between water and sediment were used to estimate sediment porewater concentrations, and these data combined with the microcosm flux data were used to estimate average, aqueous-boundary-layer total-PCB mass transfer coefficients of 0.3-1.5 cm/day. These values are consistent with estimates of mass transfer coefficients based on aqueous-boundary-layer correlations, and with PCB mass transfer coefficients inferred from the field data for low-flow conditions in the fall and winter (approximately 2 cm/day). The correspondence of the laboratory results with the field measurements and mass transfer rates demonstrates the usefulness of the microcosm technique for estimating fluxes of PCBs from river sediments under low-flow minimum bioturbation conditions MH - Mexico|Nuevo Leon MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0733-9372 UR - ISI:000188370200003 L2 - FOOD-CHAIN; PCB; MODEL; TRANSPORT; CONTAMINANTS; DESORPTION SO - Journal of Environmental Engineering-Asce 2004 ;130(2):126-135 11892 UI - 5337 AU - Ortiz JD AU - O'Connell SB AU - DelViscio J AU - Dean W AU - Carriquiry JD AU - Marchitto T AU - Zheng Y AU - van Geen A AD - Columbia Univ, Lamont Doherty Geol Observ, Palisades, NY 10964, USAKent State Univ, Dept Geol, Kent, OH 44242, USAWesleyan Univ, Dept Earth & Environm Sci, Middletown, CT 06459, USAUS Geol Survey, Earth Surface Proc, Lakewood, CO 80225, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoUniv Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309, USAUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USACUNY Queens Coll, Sch Earth & Environm Sci, Flushing, NY 11367, USAOrtiz, JD, Columbia Univ, Lamont Doherty Geol Observ, Palisades, NY 10964 USA TI - Enhanced marine productivity off western North America during warm climate intervals of the past 52 ky AB - Studies of the Santa Barbara Basin off the coast of California have linked changes in its bottom-water oxygen content to millennial-scale climate changes as recorded by the oxygen isotope composition of Greenland ice. Through the use of detailed records from a sediment core collected off the Magdalena Margin of Baja California, Mexico, we demonstrate that this teleconnection predominantly arose from changes in marine productivity, rather than changes in ventilation of the North Pacific, as was originally proposed. One possible interpretation is that the modern balance of El Nino-La Nina conditions that favors a shallow nutricline and high productivity today and during warm climate intervals of the past 52 k.y. was altered toward more frequent, deep nutricline, low productivity, El Nino-like conditions during cool climate intervals MH - USA MH - Mexico|Baja California PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 23 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000221849500016 L2 - millennial-scale climate;abrupt climate change;foraminifera;marine productivity;paleo-ENSO variability;SANTA-BARBARA BASIN; CALIFORNIA CURRENT SYSTEM; OXYGEN-MINIMUM ZONE; NITROGEN ISOTOPE; EL-NINO; PACIFIC; SEDIMENTS; WATERS; OCEAN; SURFACE SO - Geology 2004 ;32(6):521-524 11893 UI - 6017 AU - Ortiz JJ AU - Requena I AD - ININ, Dept Sistemas Nucl, Mexico City, DF, MexicoUniv Granada, Dept Ciencias Comp IA ETSII Informat, E-18071 Granada, SpainOrtiz, JJ, ININ, Dept Sistemas Nucl, Carr Mexico Toluca Km 36-5, Mexico City, DF, Mexico TI - Using a multi-state recurrent neural network to optimize loading patterns in BWRs AB - A Multi-State Recurrent Neural Network is used to optimize Loading Patterns (LP) in BWRs. We have proposed an energy function that depends on fuel assembly positions and their nuclear cross sections to carry out optimisation. Multi-State Recurrent Neural Networks creates LPs that satisfy the Radial Power Peaking Factor and maximize the effective multiplication factor at the Beginning of the Cycle, and also satisfy the Minimum Critical Power Ratio and Maximum Linear Heat Generation Rate at the End of the Cycle, thereby maximizing the effective multiplication factor. In order to evaluate the LPs, we have used a trained back-propagation neural network to predict the parameter values, instead of using a reactor core simulator, which saved considerable computation time in the search process. We applied this method to find optimal LPs for five cycles of Laguna Verde Nuclear Power Plant (LVNPP) in Mexico. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0306-4549 UR - ISI:000220203800006 L2 - loading patterns;nuclear BWRs;neural networks;multi-state recurrent neural network;CORE FUEL-MANAGEMENT; GENETIC ALGORITHMS; WATER-REACTOR; DESIGN; SYSTEM SO - Annals of Nuclear Energy 2004 ;31(7):789-803 11894 UI - 6485 AU - Ortiz JJ AU - Requena I AD - Inst Nacl Invest Nucl, Dept Sistemas Nucl, Mexico City, DF, MexicoUniv Granada, Dept Ciencias Computac, EIA ETSI Informat, E-18071 Granada, SpainOrtiz, JJ, Inst Nacl Invest Nucl, Dept Sistemas Nucl, Carr Mexico Toluca Km 36-5, Mexico City, DF, Mexico TI - An order coding genetic algorithm to optimize fuel reloads in a nuclear boiling water reactor AB - A genetic algorithm is used to optimize the nuclear fuel reload for a boiling water reactor, and an order coding is proposed for the chromosomes and appropriate crossover and mutation operators. The fitness function was designed so that the genetic algorithm creates fuel reloads that, on one hand, satisfy the constrictions for the radial power peaking factor, the minimum critical power ratio, and the maximum linear heat generation rate while optimizing the effective multiplication factor at the beginning and end of the cycle. To find the values of these variables, a neural network trained with the behavior of a reactor simulator was used to predict them. The computation time is therefore greatly decreased in the search process. We validated this method with data from five cycles of the Laguna Verde Nuclear Power Plant in Mexico MH - Mexico|Distrito Federal MH - Spain PB - LA GRANGE PK: AMER NUCLEAR SOCIETY RP - NOT IN FILE U3 - TC 5 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 0029-5639 UR - ISI:000187910300005 L2 - LOADING PATTERN DESIGN; MANAGEMENT; NETWORKS; SYSTEM SO - Nuclear Science and Engineering 2004 ;146(1):88-98 11895 UI - 4199 AU - Osorio M AU - Anglada G AU - Lizano S AU - D'Alessio P AD - CSIC, Inst Astrofis Andalucia, Granada, SpainUNAM, Ctr Radioastron & Astrofis, Morelia, Michoacan, MexicoOsorio, M, CSIC, Inst Astrofis Andalucia, Granada, Spain TI - A model to test the internal structure of the G31.41+0.31 hot molecular core AB - We investigate the physical conditions of the material around massive protostars by modelling the so-called hot molecular cores. We present a model for the spectral energy distribution ( SED) as well as the ammonia line emission of the G31.41+0.31 hot core. We find that the best fit to the SED is achieved by assuming a density distribution corresponding to the collapse of a magnetized logatropic sphere. On the other hand, the line emission is reproduced by adopting a gas phase ammonia abundance increasing towards the center of the core, as a result of the release of the ammonia molecules trapped in ice grain mantles MH - Mexico|Michoacan MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000224461300046 L2 - radiative transfer;radio lines : ISM;stars : formation;ISM : individual (G31.41+0.31);COMPACT HII-REGIONS; STAR-FORMATION SO - Astrophysics and Space Science 2004 ;292(1-4):369-374 11896 UI - 4237 AU - Osornio GA AU - Chavez M AU - Peter RE AU - Cardenas R AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Mexico City 54090, DF, MexicoUniv Alberta, Dept Biol Sci, Edmonton, AB T6G 2M7, CanadaCardenas, R, Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, AP 314, Mexico City 54090, DF, Mexico TI - Quantification of the effects of resperine on gonadotroph expression in the pituitary of goldfish (Carassius auratus) AB - In many teleosts, the control of gonadotropin II (or luteinizing hormone) secretion is under the dual control of stimulatory and inhibitory neuroendocrine factors. The principal stimulating factor is gonadotropin-releasing hormone and the main inhibitor is dopamine. Inhibiting the activities of dopamine by antidopaminergic drugs potentiates the actions of exogenous gonadotropin-releasing hormone analogs, resulting in a surge release of luteinizing hormone and ovulation and spawning in a number of different species. As the effects of blocking the inhibitory actions of dopamine on gonadotroph cytology have not been studied, goldfish were treated with 2, 4, 6 or 8 injections of reserpine (0.1 mg/kg body weight), at 48 h intervals, and the numbers of gonadotrophic cells studied at 48 h following last injection. After two injections, the number of gonadotrophic cells increased by 189% over controls; after four injections the increase was 234%; after six injections the increase was 259% and after eight injections, 288%. The results suggest that dopamine has an inhibitory influence on the numbers of gonadotrophs MH - Canada MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Article AV - English IS - 1567-2379 UR - ISI:000224248300010 L2 - SUBUNIT GENE-EXPRESSION; GROWTH-HORMONE RELEASE; FEMALE GOLDFISH; GTH-II; DOPAMINE; SECRETION; CELLS; OVULATION; NOREPINEPHRINE; TESTOSTERONE SO - Journal of Molecular Histology 2004 ;35(4):417-420 11897 UI - 5911 AU - Osornio YM AU - Miranda LD AU - Cruz-Almanza R AU - Muchowski JM AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRoche Palo Alto, Palo Alto, CA 94304, USAOsornio, YM, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Radical cyclizations to quinolone and isoquinolone systems under oxidative and reductive conditions AB - Radical cyclizations to quinolone and isoquinolone systems under Fenton-type and n-Bu3SnH-mediated conditions are described. For N-iodoalkylquinolones, ca. 3:1 mixtures of oxidative cyclization products at C-2, and unexpectedly at C-8, were obtained under both conditions. Five- or six-membered oxidative cyclization products were obtained from N-iodoalkylisoquinolones under Fenton-type conditions, whereas n-Bu3SnH-mediated reactions gave products of reductive cyclization in the five, six, and seven-membered series. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000220324300034 L2 - PYRROLES; BU3SNH; IMIDAZOLES; RINGS SO - Tetrahedron Letters 2004 ;45(13):2855-2858 11898 UI - 4561 AU - Osorno JL AU - Szekely T AD - Univ Bath, Dept Biol & Biochem, Bath BA2 7AY, Avon, EnglandUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol & Evolut, Mexico City 04510, DF, MexicoSzekely, T, Univ Bath, Dept Biol & Biochem, Bath BA2 7AY, Avon, England TI - Sexual conflict and parental care in magnificent frigatebirds: full compensation by deserted females AB - Parental care is a cooperative venture between a male and a female in many socially monogamous birds. Care is costly, and thus, sexual conflict arises between the parents about how much effort they should invest into rearing their young. The sexual conflict over care is most apparent when one parent abandons the brood before the offspring are independent. The deserted parent has three options: (1) desert the brood because a single parent is unable to raise the young on its own; (2) continue care provision at the same level as during biparental care, and thus do not compensate for the absence of mate; or (3) increase care and compensate partially or totally. We investigated these options in the magnificent frigatebird, Fregata magnificens, a species in which the male deserts his mate and brood before the chick is independent. During biparental care, females fed the chick more often than the males. After their mate deserted, the females nearly doubled their feeding rate and thus, fully compensated for the lost care. Consistent with these observations, growth rates of chicks provided with biparental and female-only care did not differ. These results support recent theoretical models of parental care, and suggest that females may withhold care during biparental care to manoeuvre their mates into prolonged care provision. A female only provides at her full capacity once her mate has deserted. (C) 2004 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0003-3472 UR - ISI:000223614300014 L2 - WARBLERS ACROCEPHALUS-ARUNDINACEUS; BROOD DESERTION; MATE DESERTION; CHARADRIUS-ALEXANDRINUS; OFFSPRING DESERTION; KENTISH PLOVERS; MANIPULATION; REPRODUCTION; SUCCESS; MALES SO - Animal Behaviour 2004 ;68():337-342 11899 UI - 5660 AU - Ostenson M AU - Gatenholm P AU - Toriz G AD - Chalmers Univ Technol, Dept Mat & Surface Chem, SE-41296 Gothenburg, SwedenUniv Guadalajara, Dept Wood Cellulose & Paper Res, Guadalajara 44050, Jalisco, MexicoOstenson, M, Chalmers Univ Technol, Dept Mat & Surface Chem, Kemivagen 4, SE-41296 Gothenburg, Sweden TI - Effects of extractives on the surface chemistry and wettability of high temperature chemithermomechanical pulps AB - The effect of extractives on surface chemistry and fiber wettability of high temperature chemithermo-mechanical pulps (HTCTMP) was studied in a model system. Dispersions of abietic acid. oleic acid and a mixture of both were added to acetone extracted HTCTMP made from spruce chips. Surface analysis by electron spectroscopy for chemical analysis, ESCA, showed that adding the dispersions to the extracted pulp decreased the relative oxygen/carbon ratio (O/C). Using scanning electron microscopy, SEM, it was found that the extractives were located mainly on fines and in fiber crossings. A major morphological difference was also found. At the surface of the pulp with only abietic acid added, spherical particles in sizes of 1-20 mum were observed. These structures were not found on any other sample. Dynamic contact angle (Whilhelmy technique) and water absorption time measurements were used to determine wettability. It was found that adding oleic acid to extracted HTCTMP only slightly affected the wettability of the pulps by increasing the advancing contact angle from 38degrees to 43degrees and the water absorption time from 70 to 110 milliseconds. In contrast, adding abietic acid resulted in a tenfold increase in the water absorption time and a contact angle of 56degrees. The results suggest that the wettability of HTCTMP pulps should be related not only to the amount of extractives but also to the chemical composition of the extractives and to their physical state at the fiber surface MH - Mexico|Jalisco MH - Sweden PB - STOCKHOLM: AB SVENSK PAPPERSTIDNING RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0283-2631 UR - ISI:000220880800008 L2 - extractives;ESCA/XPS;wettability;contact angle;CTMP;WOOD EXTRACTIVES; FIBERS; PLASMA SO - Nordic Pulp & Paper Research Journal 2004 ;19(1):53-58 11900 UI - 3165 AU - Ostrosky-Solis F AU - Ramirez M AU - Ardila A AD - Univ Nacl Autonoma Mexico, Fac Psychol, Lab Neuropsychol & Psychophysiol, Mexico City 11930, DF, MexicoFlorida Int Univ, Dept Commun Sci & Disorders, Miami, FL 33199, USAOstrosky-Solis, F, Univ Nacl Autonoma Mexico, Fac Psychol, Lab Neuropsychol & Psychophysiol, Rivera Cupia 110-71,Lomas Reforma, Mexico City 11930, DF, Mexico TI - Effects of culture and education on neuropsychological testing: A preliminary study with indigenous and nonindigenous population AB - We analyzed the influence of education and of culture on the neuropsychological profile of an indigenous and a nonindigenous population. The sample included 27 individuals divided into four groups: (a) seven illiterate Maya indigenous participants, (b) six illiterate Pame indigenous participants, (c) seven nonindigenous participants with no education, and (d) seven Maya indigenous participants with I to 4 years of education. A brief neuropsychological test battery developed and standardized in Mexico was individually administered. Results demonstrated differential effects for both variables. Both groups of indigenous participants (Maya and Pame) obtained higher scores in visuospatial tasks, and the level of education had significant effects on working and verbal memory. Our data suggested that culture dictates what it is important for survival and that education could be considered as a type of subculture that facilitates the development of certain skills MH - Mexico|Distrito Federal MH - USA PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology;Psychology U5 - J;Article AV - English IS - 0908-4282 UR - ISI:000227098600002 L2 - Maya Indians;Pame Indians;educational level;cognitive test performance;illiteracy;culture;neuropsychology;assessment;TEST-PERFORMANCE; AGE; ILLITERACY; ABILITIES; LITERACY; INDIANS; LEVEL SO - Applied Neuropsychology 2004 ;11(4):188-195 11901 UI - 5366 AU - Otero-Arnaiz A AU - Cruse-Sanders J AU - Casas A AU - Hamrick JL AD - UNAM, Inst Ecol, Morelia 58089, Michoacan, MexicoRancho Santa Ana Bot Garden, Claremont, CA 91711, USAUniv Georgia, Dept Plant Biol & Genet, Athens, GA 30602, USAOtero-Arnaiz, A, UNAM, Inst Ecol, Apdo Postal 27-3, Morelia 58089, Michoacan, Mexico TI - Isolation and characterization of microsatellites in the columnar cactus: Polaskia chichipe and cross-species amplification within the Tribe Pachycereeae (Cactaceae) AB - Microsatellite markers were developed for the columnar cactus Polaskia chichipe from central Mexico. After an enrichment procedure and three screening steps 87% of colonies contained microsatellites. A pair of primers for 10 loci (seven polymorphic) were developed, tested and used to estimate variation in samples of 18-45 individuals from the Tehuacan Valley, Mexico. Alleles per locus ranged from two to eight (mean 5.28; SD 2.5). Range of expected heterozygosity values was 0.188-0.797 (mean 0.502; SD 0.25). These loci are particularly useful for more precise evolutionary studies, such as gene flow and breeding systems, for this cactus species MH - Mexico|Michoacan MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000221636200039 L2 - dinucleotide repeats;cactus;genetic structure;molecular markers;polymerase chain reaction;simple sequence repeat;DIVERSITY SO - Molecular Ecology Notes 2004 ;4(2):265-267 11902 UI - 5212 AU - Otero JA AU - Calas H AU - Rodriguez-Ramos R AU - Maugin GA AU - Monsivais G AU - Perez-Alvarez R AD - ICIMAF, Havana 10400 4, CubaUniv La Habana, Fac Math & Computac, Havana 10400 4, CubaUniv Paris 06, Lab Modelisat Mecan, F-75252 Paris, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv La Habana, Fac Fis, Havana 10400 4, CubaOtero, JA, ICIMAF, Calle 15 E-T C&D, Havana 10400 4, Cuba TI - Diffraction of transverse horizontal waves in Fibonacci piezoelectric superlattices AB - The transfer matrix and global matrix techniques are used in the analysis of diffraction of transverse horizontal waves in piezoelectric superlattices. The system is composed of a set of different piezoelectric layers with quasiperiodic structure according to the Fibonacci sequence. The diffraction spectrum of different configurations of piezoelectric Fibonacci structures is studied. Numerical results for the diffraction spectrum for the piezoelectric Fibonacci superlattice are obtained and a comparison between the results of the transfer and global matrix methods is given, exhibiting the advantage of the latter MH - Cuba MH - France MH - Mexico|Distrito Federal PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0044-2275 UR - ISI:000222068500010 L2 - wave propagation;superlattice;layered composites;Fibonacci piezocomposites;ANISOTROPIC MEDIA; TRANSFER-MATRIX; COMPOSITE-MATERIALS; ACOUSTIC-WAVES; PROPAGATION; FORMULATION; MULTILAYERS; REFLECTION; INTERFACE SO - Zeitschrift fur Angewandte Mathematik und Physik 2004 ;55(3):519-533 11903 UI - 3926 AU - Otero R AU - Navio E AU - Cespedes FA AU - Nunez MJ AU - Lozano L AU - Moscoso ER AU - Matallana C AU - Arsuza NB AU - Garcia J AU - Fernandez D AU - Rodas JH AU - Rodriguez OJ AU - Zuleta JE AU - Gomez JP AU - Saldarriaga M AU - Quintana JC AU - Nunez V AU - Cardenas S AU - Barona J AU - Valderrama R AU - Paz N AU - Diaz A AU - Rodriguez OL AU - Martinez MD AU - Maturana R AU - Beltran LE AU - Mesa MB AU - Paniagua J AU - Florez E AU - Lourenco WR AD - Univ Antioquia, Fac Med, Programa Ofidismo Escorpionismo, Medellin, ColombiaUniv Antioquia, Fac Med, Dept Pediat, Medellin, ColombiaClin ISS & Hosp Federico Lleras, Ibague, ColombiaSanidad Mil, Base Aerea, Melgar, ColombiaHosp Melgar, Melgar, ColombiaHosp Flandes, Flandes, ColombiaHosp El Espinal, El Espinal, ColombiaHosp Mutata, Mutata, ColombiaHosp Necocli, Necocli, ColombiaHosp Santa Fe Antioquia, Santa Fe Antioquia, ColombiaHosp Caucasia, Caucasia, ColombiaHosp Zaragoza, Zaragoza, ColombiaHosp Angelopolisy, Angelopolisy, ColombiaHosp Puerto Triunfo, Puerto Triunfo, ColombiaHosp Univ San Vicente Paul, Medellin, ColombiaInst Bioclon SA CV, Mexico City 14050, DF, MexicoUniv Nacl, Museo Ciencias Nat, Bogota, ColombiaMuseum Natl Hist Nat, F-75005 Paris, FranceOtero, R, Univ Antioquia, Fac Med, Programa Ofidismo Escorpionismo, AA 1226, Medellin, Colombia TI - Scorpion envenoming in two regions of Colombia: clinical, epidemiological and therapeutic aspects AB - To determine clinical and epidemiological features of scorpion stings in two departments of Colombia, a descriptive study was performed in the hospitals of 10 towns from Antioquia (2 256 071 inhabitants) and five from Tolima (630 424 inhabitants). One hundred and twenty-nine cases were admitted during one year, 51 in Antioquia, 78 in Tolima and 41 were children less than 15 years old. Most stings (70.5%) occurred inside the house; 27.9% were on the hands and 26.4% on the feet. The scorpion species involved were Tityus pachyurus (51), Centruroides gracilis (31), T fuehrmanni (29), T asthenes (7) and Chactas spp. (1). In 10 cases the scorpion involved was not identified. Systemic envenoming signs (e.g. vomiting, tachypnea) were significantly more frequent in children than in adults (P < 0.05). Four children had hypertension, but none developed pulmonary oedema. One 3-year-old girl, stung by T asthenes, had acute oedematous pancreatitis. Ninety-eight patients had mild envenoming. Moderate (27 patients) and severe (four patients) envenoming was significantly more frequent in children than in adults (P = 0.003; relative risk = 2.97). A pepsin-digested anti-Centruroides spp. antivenom was administered to 19 of 31 patients presenting systemic envenoming signs. No adverse reactions to antivenom were observed. (C) 2004 Royal Society of Tropical Medicine and Hygiene. Published by Elsevier Ltd. All rights reserved MH - Colombia MH - France MH - Mexico|Distrito Federal PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 6 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000224900600008 L2 - scorpion;envenoming;fabotherapy;OCCITANUS-TUNETANUS BOT; AUSTRALIS-GARZONII AAG; CARDIOVASCULAR MANIFESTATIONS; LEIURUS-QUINQUESTRIATUS; SNAKE BITES; TITYUS; CHILDREN; ENVENOMATION; VENOM; ANTIVENOM SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2004 ;98(12):742-750 11904 UI - 5244 AU - Ovalle-Martinez FJ AU - Gonzalez JS AU - Stojmenovic I AD - Univ Nacl Autonoma Mexico, IIMAS, DISCA, Mexico City 01000, DF, MexicoUniv Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaGonzalez, JS, Univ Nacl Autonoma Mexico, IIMAS, DISCA, POB 20-726,Del A Obregon, Mexico City 01000, DF, Mexico TI - A parallel hill climbing algorithm for pushing dependent data in clients-providers-servers systems AB - The up-link bandwidth in satellite networks and in advanced traffic wireless information system is very limited. A server broadcasts data files provided by different independent providers and accessed by many clients in a round-robin manner. The clients who access these files may have different patterns of access. Some clients may wish to access several files in any order (AND), some wish to access one out of several files (OR), and some clients may access a second file only after accessing another file (IMPLY). The goal of the server is to order the files in a way that minimizes the access time of the clients given some a priori knowledge of their access patterns. An appropriate clients-servers model was recently proposed by Bay-Noy, Naor and Schieber. They formulated three separate problems and proposed an algorithm that evaluates certain number of random permutations and chooses the one whose access time is minimized. In this paper, we formulate a combined AOI (AND-OR-IMPLY) problem, and propose to apply a parallel hill climbing algorithm (to each of the four problems), which begins from certain number of random permutations, and then applies hill climbing technique on each of them until there is no more improvement. The evaluation time of neighboring permutations generated in hill climbing process is optimized, so that it requires O(n) time per permutation instead of O(n(2)) time required for evaluating access time of a random permutation, where n is the number of files the server broadcasts. Experiments indicate that the parallel hill climbing algorithm is O(n) times faster that random permutations method, both in terms of time needed to evaluate the same number of permutations, and time needed to provide a high quality solution. Thus the improvement is significant for broadcasting large number of files MH - Canada MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Hardware & Architecture;Computer Science, Information Systems;Telecommunications U5 - J;Article AV - English IS - 1383-469X UR - ISI:000221961000002 L2 - data broadcasting;hill climbing algorithms;BROADCAST; DISSEMINATION; ENVIRONMENTS SO - Mobile Networks & Applications 2004 ;9(4):257-264 11905 UI - 5281 AU - Ovalle-Martinez FJ AU - Stojmenovic I AU - Garcia-Nocetti F AU - Solano-Gonzalez J AD - Univ Ottawa, SITE, Ottawa, ON K1N 6N5, CanadaNatl Autonomous Univ Mexico, IIMAS, DISCA, Mexico City 04510, DF, MexicoOvalle-Martinez, FJ, Univ Ottawa, SITE, Ottawa, ON K1N 6N5, Canada TI - Finding minimum transmission radii for preserving connectivity and constructing minimal spanning trees in ad hoc and sensor networks AB - The minimum transmission radius R that preserves ad hoc network connectivity is equal to the longest edge in the minimum spanning tree. This article proposes to use the longest LMST (local MST, recently proposed message free approximation of MST) edge to approximate R using a wave propagation quazi-localized algorithm. Despite small number of additional edges in LMST with respect to MST, they can extend R by about 33% its range on networks with up to 500 nodes. We then prove that MST is a subset of LMST and describe a quazi-localized scheme for constructing MST from LMST The algorithm eliminates LMST edges which are not in MST by a loop breakage procedure, which iteratively follows dangling edges from leaves to LMST loops, and breaks loops by eliminating their longest edges, until the procedure finishes at a single leader node, which then broadcasts R to other nodes MH - Canada MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000221775800028 SO - Experimental and Efficient Algorithms 2004 ;3059():369-382 11906 UI - 6645 AU - Ovruski SM AU - Schliserman P AU - Aluja M AD - Consejo Nacl Invest Cient & Tecn, Inst Super Entomol, FCNeIML, UNT,Fundac Miguel Lillo,CIRPON, RA-251 San Miguel De Tucuman, ArgentinaInst Ecol AC, Xalapa 91000, Veracruz, MexicoOvruski, SM, Inst Ecol, Div Ecol, Martin Aluja,Km 2 5,Antigua Carretera Coatepec 35, Xalapa 91070, Veracruz, Mexico TI - Indigenous parasitoids (Hymenoptera) attacking Anastrepha fraterculus and Ceratitis capitata (Diptera : Tephritidae) in native and exotic host plants in Northwestern Argentina AB - We collected 16 species of wild and cultivated fruit fly (Diptera: Tephritidae) host plants over a 5-year period (1991-1995) in the province of Tucuman, Northwestern Argentina, with the aim of determining: (1) relative abundance and variations in native parasitoid abundance over time, (2) parasitoid associations with C. capitatal A. fraterculus host plants, and (3) parasitoid guild composition in native and exotic hosts. The fruit species surveyed included the following native (3) and exotic (13) plants: Juglans australis Grisebach (Juglandaceae), Eugenia uniflora L., and Myrcianthes pungens (Berg) Legrand (Myrtaceae) (all native species); Annona cherimola Miller (Annonaceae), Citrus aurantium L., C paradisi Macfadyen, C. reticulata Blanco, C. sinensis (L.) Osbeck (Rutaceae), Prunus armeniaca L., P. domestica L., P. persica (L.) Batsch, Eriobotrya japonica (Thunb.) Lindl. (Rosaceae), Diospyros kaki L. (Ebenaceae), Ficus carica L. (Moraceae), Mangifera indica L. (Anacardiaceae), and Psidium guajava L. (Myrtaceae) (all exotic fruits). Of these, only J. australis, P. persica, P. armeniaca, P. domestica, E. uniflora, M. pungens, and P. guajava harbored parasitoids. A total of 13,926 native larval-pupal parasitoids representing five species in two families were obtained. Doryctobracon areolatus (Szepligeti) (Braconidae: Opiinae) and Aganaspis pelleranoi (Brethes) (Figitidae: Eucoilinae) represented 61.5 and 27.9%, respectively, of all recovered parasitoids. The other three species, Doryctobracon brasiliensis (Szepligeti), Utetes anastrephae (Viereck), and Opius bellus Gahan (all Braconidae: Opiinae), represented 9.2, 1.2, and 0.3%, respectively, of the total parasitoid number. Of the latter five parasitoid species, only D. areolatus and A. pellenaroi exhibited diapause. A. pelleranoi was significantly more abundant in guava and peach samples gathered from the ground than in samples collected from the trees. The fly species recovered were Anastrepha fraterculus, Ceratitis capitata, and Anastrepha sp. representing 76.3, 23.2, and 0.5%, respectively, of all emerged adults. Parasitization levels varied according to fruit type and year and ranged between 3.1 and 19.2%. Highest parasitism rates were recorded in "feral" P. guajava and P. persica (both exotic) and the native E. uniflora, which was one of the smallest fruits sampled. In exotic fruits such as M. indica L., A. cherimola, and Citrus spp. (all over 150 g) and E. japonica, F. carica, and D. kaki (all less than 89 g) not a single parasitoid was obtained over the 5-year study period. We discuss our findings in light of their biological relevance (e.g., lack of C. capitata parasitism by native braconid parasitoids) and their practical implications. (C) 2003 Elsevier Science (USA). All rights reserved MH - Argentina MH - Mexico|Veracruz PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000187572100006 L2 - tephritidae;Ceratitis capitata;Anastrepha fraterculus;native parasitoids;braconidae;figitidae;biological control;Argentina;FRUIT-FLIES DIPTERA; LONGICAUDATA ASHMEAD HYMENOPTERA; LARVAL-PUPAL PARASITOIDS; BIOLOGICAL-CONTROL; FLY DIPTERA; COSTA-RICA; BRACONIDAE; MEXICO; SPP.; DISTRIBUTIONS SO - Biological Control 2004 ;29(1):43-57 11907 UI - 5552 AU - Ozuna O AU - Hirata GA AU - McKittrick J AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUniv Calif San Diego, Dept Mech Aerosp Engn, La Jolla, CA 92093, USAUniv Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093, USAHirata, GA, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, Mexico TI - Pressure influenced combustion synthesis of gamma- and alpha-Al2O3 nanocrystalline powders AB - Aluminium oxide nanocrystals have been prepared via a straightforward reaction, initiated at low temperatures (<300 degreesC), between aluminium nitrate and hydrazine. The initial pressure parameter is found to be responsible for the variations of the particle size (ranging from nanocrystalline to submicrocrystalline) and for the resulting crystalline phase (gamma-or alpha-Al2O3) of these powders. The fibre-like morphology obtained for the as-synthesized gamma-Al2O3 permits the synthesis of nanocrystalline alpha-A(2)O(3) (similar to55 nm) even after a high temperature treatment at 1200degreesC. The findings suggest a promising approach for controlling the size and crystal phase of the particles MH - Mexico|Baja California MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000221272500017 L2 - ALPHA-ALUMINA; SURFACE-AREA; GAMMA-AL2O3; STABILITY; SIZE; SOL SO - Journal of Physics-Condensed Matter 2004 ;16(15):2585-2591 11908 UI - 6234 AU - Ozuna O AU - Hirata GA AU - McKittrick J AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, MexicoUniv Calif San Diego, Mech & Aerosp Engn & Mat Sci & Engn Program, La Jolla, CA 92093, USAOzuna, O, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Apartado Postal 2681, Ensenada 22860, Baja California, Mexico TI - Luminescence enhancement in Eu3+-doped alpha- and gamma-Al2O3 produced by pressure-assisted low-temperature combustion synthesis AB - Intense red luminescence in Eu3+-doped gamma (gamma) and alpha (alpha) alumina (Al2O3) phosphors obtained by direct and indirect combustion synthesis at low-temperatures is reported. gamma and alpha-(Al1-xEux)(2)O-3 are easily produced by combustion synthesis at 280 degreesC in the range of x=0.001-0.06 at. %. The well-defined direct synthesis allows europium ions to incorporate into the alpha or gamma alumina lattice in spite of the large size difference between these ions and the aluminum cations in Al2O3. These materials yield a strong fluorescence at room temperature due to f-f transition lines within Eu3+ (4f(6)) electron emission configuration. Furthermore, from luminescence measurements, it is deduced that Eu3+ occupy low-symmetry sites in the Al2O3 lattice. (C) 2004 American Institute of Physics MH - Mexico|Baja California MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000189075000022 L2 - EU3+-Y2O3 NANOCRYSTALS; ALUMINA; EUROPIUM; SAPPHIRE; IONS SO - Applied Physics Letters 2004 ;84(8):1296-1298 11909 UI - 3746 AU - Pacheco-Alvarez D AU - Solorzano-Vargas RS AU - Gravel RA AU - Cervantes-Roldan R AU - Velazquez A AU - Leon-Del-Rio A AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Mol & Biotecnol, Mexico City 04510, DF, MexicoUniv Calgary, Dept Biochem & Mol Biol, Calgary, AB T2N 4N1, CanadaUniv Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Genet Nutr, Mexico City 04530, DF, MexicoLeon-Del-Rio, A, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Mol & Biotecnol, Mexico City 04510, DF, Mexico TI - Paradoxical regulation of biotin utilization in brain and liver and implications for inherited multiple carboxylase deficiency AB - Holocarboxylase synthetase (HCS) catalyzes the biotinylation of five carboxylases in human cells, and mutations of HCS cause multiple carboxylase deficiency (MCD). Although HCS also participates in the regulation of its own mRNA levels, the relevance of this mechanism to normal metabolism or to the MCD phenotype is not known. In this study, we show that mRNA levels of enzymes involved in biotin utilization, including HCS, are down-regulated during biotin deficiency in liver while remaining constitutively expressed in brain. We propose that this mechanism of regulation is aimed at sparing the essential function of biotin in the brain at the expense of organs such as liver and kidney during biotin deprivation. In MCD, it is possible that some of the manifestations of the disease may be associated with down-regulation of biotin utilization in liver because of the impaired activity of HCS and that high dose biotin therapy may in part be important to overcoming the adverse regulatory impact in such organs MH - Canada MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000225493400072 L2 - DEPENDENT MULTIVITAMIN TRANSPORTER; PROPIONYL-COA CARBOXYLASE; RAT-LIVER; HOLOCARBOXYLASE SYNTHETASE; PYRUVATE-CARBOXYLASE; MESSENGER-RNA; FUNCTIONAL EXPRESSION; GUANYLATE-CYCLASE; ESCHERICHIA-COLI; HUMAN-CELLS SO - Journal of Biological Chemistry 2004 ;279(50):52312-52318 11910 UI - 6031 AU - Pacheco J AU - Shibayama M AU - Campos R AU - Beck DL AU - Houpt E AU - Petri WA AU - Tsutsumi V AD - CINVESTAV, IPN, Natl Polytech Inst, Ctr Res & Adv Studies,Dept Expt Pathol, Mexico City 07360, DF, MexicoLa Salle Univ, Electron Microscopy Lab, Mexican Fac Med, Mexico City 14000, DF, MexicoNatl Polytech Inst, Sch Med, Dept Biochem, Mexico City 11340, DF, MexicoUniv Virginia Hlth Syst, Div Infect Dis & Int Hlth, Charlottesville, VA 22908, USATsutsumi, V, CINVESTAV, IPN, Natl Polytech Inst, Ctr Res & Adv Studies,Dept Expt Pathol, Av IPN 2508, Mexico City 07360, DF, Mexico TI - In vitro and in vivo interaction of Entamoeba histolytica Gal/GalNAc lectin with various target cells: an immunocytochemical analysis AB - The Gal/GalNAc lectin of Entamoeba histolytica trophozoites plays an important role in adhesion. The distribution and final destiny of the lectin during the interaction with host cells are poorly understood. Using monoclonal and polyclonal antibodies against the lectin we studied by immunocytochemistry the in vitro and in vivo interaction of E. histolytica trophozoites with human and hamster hepatocytes. We also analyzed the presence and distribution of the lectin in a mouse model of intestinal amoebiasis. In all cases, trophozoites were highly labeled by anti-lectin antibodies. Cultured human and hamster hepatocytes in contact with, or localized at the vicinity of parasites were also labeled by anti-lectin antibodies. Most of the labeled hepatocytes showed variable degrees of cell damage. Hepatocytes distantly localized from the parasites were also stained with the anti-lectin antibodies. Immunolabeling of tissue sections from different stages of the development of experimental amoebic liver abscess in hamsters showed inflammatory foci containing lectin-labeled trophozoites, hepatocytes, and simisoidal and inflammatory cells. Lectin-containing hepatocytes had vacuolated cytoplasm with some nuclei with a condensed appearance. Damaged intestinal epithelium also was labeled with anti-lectin antibodies in a mouse model of intestinal amoebiasis. Electron microscopy of axenically cultured trophozoites using gold-labeled monoclonal and polyclonal anti-lectin antibody showed that plasma membrane, vacuole membranes and areas of cell cytosol were labeled. Higher deposits of gold particles in plasma membrane suggestive of cell secretion were observed. Our results demonstrated that Gal/GalNAc lectin was bound and captured by different target cells, and that host cells containing the lectin showed signs of cell damage. The contribution of lectin transfer to host cells in adherence and cell injury remains to be determined. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Parasitology U5 - J;Article AV - English IS - 1383-5769 UR - ISI:000220076800005 L2 - Entamoeba histolytica;Gal/GalNAc lectin;cultured hepatocyte;amoebic liver abscess;intestinal ulcer;immunohistochemistry;INHIBITABLE ADHERENCE LECTIN; GALACTOSE-SPECIFIC LECTIN; CYTOPATHOGENIC MECHANISMS; LIVER-ABSCESS; TROPHOZOITES; CULTURE; BASES; RAT SO - Parasitology International 2004 ;53(1):35-47 11911 UI - 3855 AU - Paez-Hernandez ME AU - guilar-Arteaga K AU - Valiente M AU - Ramirez-Silva MT AU - Romero-Romo M AU - Palomar-Pardave M AD - Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Pachuca 42076, Hidalgo, MexicoUniv Autonoma Metropolitana Azcapotzalco, Dept Mat, Area Ciencia Mat, Mexico City 02200, DF, MexicoUniv Autonoma Barcelona, Fac Ciencies, Ctr GTS, Unitat Analit,Dept Quim, E-08193 Barcelona, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Area Quim Analit, Lab R105, Mexico City 09340, DF, MexicoPaez-Hernandez, ME, Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Carretera Pachuca Tulancingo,Km 4-5, Pachuca 42076, Hidalgo, Mexico TI - Facilitated transport of Hg(II) through novel activated composite membranes AB - The results presented in this work deal with the prime application of activated composite membranes (ACMs) for the transport of Hg(II) ions in a continuous extraction-re-extraction system using di-(2-ethylhexyl)-dithiophosphoric acid (DTPA) as carrier. The effects of variables such as the pH, the nature of the acid and the concentration of the casting solutions on the transport of Hg(II) are also investigated. When the ACM was prepared with a 0.5 M DTPA solution and when the feed solution contained 2.5x 10(-4) M Hg(II) in 0.1 M HCl, the amount of mercury extracted was greater than 76%. The re-extracted mercury was subsequently recovered by means of a stripping phase comprising 0.3 M thiourea solution in 2 M H2SO4, yielding 54% of the initial amount of mercury after transport had taken place for 180 min MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Spain PB - HEIDELBERG: SPRINGER HEIDELBERG RP - NOT IN FILE U3 - TC 5 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1618-2642 UR - ISI:000225276800015 L2 - activated composite membrane (ACM);mercury;transport;DTPA;PREDOMINANCE-ZONE DIAGRAMS; SUPPORTED LIQUID MEMBRANES; EFFICIENT TRANSPORT; CONDENSED PHASES; CARRIER; MERCURY(II); ION; EQUILIBRIA; SEPARATION; SYSTEMS SO - Analytical and Bioanalytical Chemistry 2004 ;380(4):690-697 11912 UI - 3806 AU - Page D AU - Lattimer JM AU - Prakash M AU - Steiner AW AD - Natl Autonomous Univ Mexico, Inst Astron, Dept Astrofis Teorica, Mexico City 04510, DF, MexicoSUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794, USAUniv Minnesota, Sch Phys & Astron, Minneapolis, MN 55455, USAPage, D, Natl Autonomous Univ Mexico, Inst Astron, Dept Astrofis Teorica, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - Minimal cooling of neutron stars: A new paradigm AB - A new classification of neutron star cooling scenarios, involving either "minimal'' cooling or "enhanced'' cooling, is proposed. The minimal cooling scenario replaces and extends the so-called standard cooling scenario to include neutrino emission from the Cooper pair breaking and formation process. This emission dominates that due to the modified Urca process for temperatures close to the critical temperature for superfluid pairing. Minimal cooling is distinguished from enhanced cooling by the absence of neutrino emission from any direct Urca process, due either to nucleons or to exotica such as hyperons, Bose condensates, or deconfined quarks. Within the minimal cooling scenario, theoretical cooling models can be considered to be a four parameter family involving the equation of state ( including various compositional possibilities) of dense matter, superfluid properties of dense matter, the composition of the neutron star envelope, and the mass of the neutron star. The consequences of minimal cooling are explored through extensive variations of these parameters. The results are compared with the inferred properties of thermally emitting neutron stars in order to ascertain if enhanced cooling occurs in any of them. All stars for which thermal emissions have been clearly detected are at least marginally consistent with the lack of enhanced cooling, given the combined uncertainties in ages and temperatures or luminosities. The two pulsars PSR 0833 - 45 (Vela) and PSR 1706 - 44 would require enhanced cooling in case their ages and/or temperatures are on the lower side of their estimated values, whereas the four stars PSR 0656+14, PSR 1055 - 52, Geminga, and RX J0720.4 - 3125 may require some source of internal heating in case their age and/or luminosity are on the upper side of their estimated values. The new upper limits on the thermal luminosity of PSR J0205+6449 ( in the supernova remnant 3C 58) and RX J0007.0+7302 ( in CTA 1) are indicative of the occurrence of some enhanced neutrino emission beyond the minimal scenario MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 59 U4 - Astronomy & Astrophysics U5 - J;Review AV - English IS - 0067-0049 UR - ISI:000225386100012 L2 - dense matter;equation of state;neutrinos;stars : neutron;X-RAY-SPECTRUM; SUPERNOVA REMNANT G292.0+1.8; QUASI-PARTICLE INTERACTIONS; THERMAL EVOLUTION; NUCLEON MATTER; XMM-NEWTON; MAGNETIZED ENVELOPES; PROTON SUPERFLUIDITY; SURFACE-TEMPERATURE; ACCRETED ENVELOPES SO - Astrophysical Journal Supplement Series 2004 ;155(2):623-650 11913 UI - 4778 AU - Page K AU - Proffen T AU - Terrones H AU - Terrones M AU - Lee L AU - Yang Y AU - Stemmer S AU - Seshadri R AU - Cheetham AK AD - Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106, USAUniv Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106, USAIPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoLos Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545, USACheetham, AK, Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA TI - Direct observation of the structure of gold nanoparticles by total scattering powder neutron diffraction AB - Fluorothiol-capped fcc gold nanoparticles, with a mean diameter of approximately 4 nm have been studied using total scattering powder neutron diffraction at 15 and 300 K on the NPDF diffractometer at the Manuel Lujan Jr. Neutron Scattering Center. The results are compared with bulk gold powder. A real space analysis of the structure of the nanoparticles has been performed using the pair distribution function (PDF). This provides valuable information and reveals several interesting features. The PDF pattern for the nanoparticles is significantly attenuated compared to bulk gold due to the finite size of the particles; the attenuation is consistent with the 4 nm size of the particles. The nanoparticles have a slightly smaller lattice parameter at both temperatures but the nearest neighbor Au-Au vectors are entirely symmetrical and there is no evidence for structural relaxation associated with atoms near the surface. The vector between surface Au atoms and sulfur of the thiol cap layer can be observed at similar to2.4 Angstrom. The study points to the great power of total neutron scattering in ensemble-averaged analysis of structure in the nano regime. (C) 2004 Elsevier B.V. All rights reserved MH - USA MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000223043100019 L2 - PAIR DISTRIBUTION FUNCTION; X-RAY-DIFFRACTION; NANOCRYSTALS; REFINEMENT SO - Chemical Physics Letters 2004 ;393(4-6):385-388 11914 UI - 4661 AU - Paglione TAD AU - Yam O AU - Tosaki T AU - Jackson JM AD - CUNY York Coll, Jamaica, NY 11451, USAInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoGunma Astron Observ, Gunma 3770702, JapanBoston Univ, Dept Astron, Boston, MA 02215, USAPaglione, TAD, CUNY York Coll, 94-20 Guy R Brewer Blvd, Jamaica, NY 11451 USA TI - The structure, kinematics, and physical properties of the molecular gas in the starburst nucleus of NGC 253 AB - We present 5".2x2".6 resolution interferometry of CO J=1-->0 emission from the starburst galaxy NGC 253. The high spatial resolution of these new data, in combination with recent high-resolution maps of (CO)-C-13, HCN, and near-infrared emission, allow us for the first time to link unambiguously the gas properties in the central starburst of NGC 253 with its bar dynamics. We confirm that the star formation results from bar-driven gas flows as seen in "twin peaks'' galaxies. Two distinct kinematic features are evident from the CO map and position-velocity diagram: a group of clouds rotating as a solid body about the kinematic center of the galaxy and a more extended gas component associated with the near-infrared bar. We model the line intensities of CO, HCN, and (CO)-C-13 to infer the physical conditions of the gas in the nucleus of NGC 253. The results indicate increased volume densities around the radio nucleus in a twin peaks morphology. Compared with the CO kinematics, the gas densities appear highest near the radius of a likely inner Linblad resonance and slightly lead the bar minor axis. This result is similar to observations of the face-on, twin peaks galaxy NGC 6951 and is consistent with models of starburst generation due to gas inflow along a bar MH - USA MH - Japan MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223403400018 L2 - galaxies : individual (NGC 253);galaxies : ISM;galaxies : nuclei;galaxies : starburst;NEARBY SPIRAL GALAXIES; NGC 253; DENSE GAS; ROTATIONAL-EXCITATION; CENTRAL REGIONS; IONIZED-GAS; CO SURVEY; CLOUDS; RATIO; BAR SO - Astrophysical Journal 2004 ;611(2):835-845 11915 UI - 3583 AU - Paic G AU - Skowronski PK AU - Tomasik B AD - CERN, CH-1211 Geneva, SwitzerlandUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoNiels Bohr Inst, DK-2100 Copenhagen O, DenmarkSkowronski, PK, CERN, CH-1211 Geneva, Switzerland TI - Effect of hard processes on momentum correlations AB - The effect of hard processes to be encountered in HBT studies at the Large Hadron Collider (LHC) have been studied. A simple simulation has allowed us to generate momentum correlations involving jet particles as well as particles originating from the kinetic freeze-out and to compare them to a simple theoretical model which has been developed. The first results on the effect of hard processes on the correlation function for the case of jet quenching are presented MH - Denmark MH - Mexico|Distrito Federal MH - Switzerland PB - WARSAW: INST NUCLEAR CHEMISTRY TECHNOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Physics, Nuclear U5 - J;Article AV - English IS - 0029-5922 UR - ISI:000225826900021 L2 - hard processes;jets;momentum correlations;HBT;LHC;ALICE SO - Nukleonika 2004 ;49():S89-S94 11916 UI - 4313 AU - Pal U AU - Serrano JG AU - Koshizaki N AU - Sasaki T AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Autonoma Estado Hidalgo, Ctr Invest Mat & Met, Pachuca 42074, Hgo, MexicoNatl Inst Adv Ind Sci & Technol, Nanoarchitecton Res Ctr, Tsukuba, Ibaraki 3058565, JapanPal, U, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Photoluminescence in Si/ZnO nanocomposites AB - Composite films of Si and ZnO were prepared by r.f. co-sputtering technique with different Si contents. Photoluminescence (PL) and Raman spectroscopy were used to characterize the films. Transmission electron microscopy revealed that the Si dispersed in the ZnO matrix form nano-particles of size ranging from 2 to 4 nm. On thermal annealing at and above 700degreesC, the nano-particles aggregated to form micro-crystals. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy revealed that the Si in the composite films remain in the SiOx (0 < X < 2) state. With the increase of annealing temperature, the higher oxidation state of Si is revealed. A strong and broad PL peak revealed at around 2.24 eV along with the other emissions. The emission could involve a band-to-band recombination mechanism within Si cores and emission sensitive to surface and/or interface states. Evolution of PL emissions and Raman peaks are discussed on the basis of formation of nano-particles and micro-crystals in the films and variation of oxidation state of Si with annealing temperature. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Hidalgo MH - Mexico|Puebla PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000224050000005 L2 - nanocomposites;photoluminescence;Raman;Si-ZnO;CHEMICAL VAPOR-DEPOSITION; OXIDIZED POROUS SILICON; VISIBLE PHOTOLUMINESCENCE; SI NANOCRYSTALS; INFRARED-ABSORPTION; OPTICAL-PROPERTIES; ZNO MATRIX; FILMS; LUMINESCENCE; SPECTRA SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2004 ;113(1):24-29 11917 UI - 6190 AU - Pal U AU - Garcia-Serrano J AU - Casarrubias-Segura G AU - Koshizaki N AU - Sasaki T AU - Terahuchi S AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoNatl Inst Adv Ind Sci & Technol, Nanoarchitecton Res Ctr, Tsukuba, Ibaraki 3058565, JapanPal, U, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Structure and optical properties of M/ZnO (M=Au, Cu, Pt) nanocomposites AB - Metal (An, Cu, Pt)/zine oxide nanocomposite films were prepared with different metal contents by radio frequency co-sputtering technique. The films were annealed at different temperatures in an argon atmosphere for 2 h. Formation of metal nanoparticles was studied by transmission electron microscopy (TEM) and X-ray diffraction (XRD). UV-Vis optical absorption spectroscopy was used for optical characterization of the samples. With the increase of annealing temperature, the size of the metal particles in the ZnO matrix varied. Surface plasmon resonance bands were observed in the Au/ZnO and Cu/ZnO composite films due to the formation of nanometer-size An and Cu particles in the matrix. However, a similar behavior was not seen with Pt/ZnO composites. Upon incorporation of Pt nanoparticles in the ZnO matrix, the optical band gap of the matrix was drastically reduced. (C) 2003 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000189082200006 L2 - M/ZnO;nanocomposites;structural properties;optical properties;THIN-FILMS; NANOPARTICLES; NANOSTRUCTURE; GLASS; AU SO - Solar Energy Materials and Solar Cells 2004 ;81(3):339-348 11918 UI - 5096 AU - Pala M AU - Ryan J AU - Mazid A AU - Abdallah O AU - Nachit M AD - ICARDA, Aleppo, SyriaCIMMYT, Int Ctr Maize & Wheat Improvement, El Batan, MexicoRyan, J, ICARDA, POB 5466, Aleppo, Syria TI - Wheat farming in Syria: An approach to economic transformation and sustainability AB - Sustainability has recently become an ingrained concept in crop production systems worldwide, and is the cornerstone of research programs of the global network of research centers operated by the Consultative Group of International Agricultural Research (CGIAR), which functions in collaboration with the various national agricultural research systems. One of the major CGIAR centers, the International Center for Agricultural Research in the Dry Areas (ICARDA), focuses mainly on dryland agriculture, but increasingly on irrigation, in its mandate area of West and Central Asia and North Africa. ICARDA has collaboration programs with its host country, Syria, the cradle of civilization and of settled agriculture, and the center of origin of many of the world's major crops, notably cereals and pulses. Wheat is, and has been, the most important commodity food in Syria. The Center's goal is to enhance wheat productivity in a sustainable manner for the benefit of the country's resource-poor farmers and society as a whole. Wheat is grown on about 1.5 million ha or 27% of the total cultivated land in Syria, mainly under rainfed conditions (300-500 mm annual rainfall), which are increasingly experiencing supplemental irrigation, while drier (<200 mm) areas are fully irrigated. Improved cultivars generally combine high yield potential and stress tolerance and tend to have high yield stability, being input-efficient under limited resources in stress environments and input responsive under favorable environments. Such varieties are tested under farmers' conditions through multi-year multi-locations. Other aspects of the ICARDA-Syrian collaboration wheat program include improved tillage, with an emphasis on conservation systems, adequate fertilization, and improved agronomic practices, e.g., early sowing in relation to rainfall conditions, optimum row spacing and plant population, and adequate weed control. This vigorous collaborative research-technology transfer program has produced a major shift in wheat production in Syria, from traditional low-input practices with landrace or improved cultivars to widespread adoption (two-thirds of wheat area) of modern cultivars along with improved production technology. As a result of such efforts, national income has substantially increased, and Syria has become a net exporter of wheat. Thus, the collaborative efforts of an international research center and its host country have shown clearly that there is an alternative to a traditional, low-output agriculture and its associated ills MH - Mexico|Estado De Mexico MH - Syria PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0889-1893 UR - ISI:000222168200008 L2 - Syrian agriculture;wheat production technology;tainted and irrigated cropping;MEDITERRANEAN-TYPE ENVIRONMENT; SUPPLEMENTAL IRRIGATION; NORTHERN SYRIA; DURUM-WHEAT; TRIALS; FERTILIZER; MANAGEMENT; SYSTEMS; CLIMATE; BARLEY SO - Renewable Agriculture and Food Systems 2004 ;19(1):30-34 11919 UI - 6159 AU - Palacios EG AU - Juarez-Lopez G AU - Monhemius AJ AD - Inst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 07738, DF, MexicoUniv London Imperial Coll Sci Technol & Med, RSM, London SW7 2BP, EnglandPalacios, EG, Inst Politecn Nacl, ESIQIE, Dept Ingn Met, AP 75-616, Mexico City 07738, DF, Mexico TI - Infrared spectroscopy of metal carboxylates - II. Analysis of Fe(III), Ni and Zn carboxylate solutions AB - The metal carboxylate complexes present in the organic solutions used in the hydrolytic stripping process strongly affect the nature of the solid precipitated; in some cases, the product is a mixed oxide while in others, a mixture of single-metal oxides is obtained. Infrared (IR) spectroscopy is a useful tool for determining the speciation of metal loaded organic phases. In the previous work, relationships of the form [V-10] = alphaA(vM) + betaA(vD) were obtained for the estimation of the free Versatic acid present in metal carboxylate solutions at given specific temperatures. In this work, infrared spectroscopy has been used for the speciation of single-metal Versatic 10(TM) solutions containing Fe(III), Zn and Ni at temperatures between 20 and 200degreesC. It was found that iron and zinc predominantly form complexes with bidentate structures at all the concentration levels tested, while the nickel complexes contain bidentate ligands at low concentrations and both monodentate and bidentate ligands at high concentrations. The evidence found in this work supports the existence of a binuclear ferric Versatic complex, [Fe(OH)V-2](2), with chelating Versatic groups forming an octahedron around each of the iron atoms. An oxo-centred structure, containing only bridging carboxylate groups, is proposed for the zinc Versatic complex, which is believed to be present in the organic medium as Zr4O(V)(6). (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0304-386X UR - ISI:000189132400015 L2 - infrared spectroscopy;metal carboxylate;versatic complex;COMPLEXES; VERSATIC-10; EXTRACTION; IRON(III); ACID SO - Hydrometallurgy 2004 ;72(1-2):139-148 11920 UI - 3534 AU - Palekar MP AU - Cabrera-Diaz E AU - Kalbasi-Ashtari A AU - Maxim JE AU - Miller RK AU - Cisneros-Zevallos L AU - Castillo A AD - Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USAUniv Guadalajara, Dept Publ Hlth, Zapopan, Jalisco, MexicoTexas A&M Univ, Natl Ctr Electron Beam Food Res, College Stn, TX, USACastillo, A, Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843, USA TI - Effect of electron beam irradiation on the bacterial load and sensorial quality of sliced cantaloupe AB - Electron beam irradiated sliced cantaloupe was tested for 21 d of storage for total aerobic microbial counts, texture, color, and different sensorial parameters as a function of irradiation doses 0, 0.7, and 1.4 kGy and the wash treatments, 1 and 200 ppm chlorine applied to the melons before cutting. Irradiation resulted in a reduction in the total aerobic microbial counts with increasing doses. Melons washed only with water before cutting had total aerobic bacterial counts of 4.0, 2.0, and 0.8 log colony-forming units (CFU)/g on day 0 at irradiation doses of 0, 0.7, and 1.4 kGy, respectively. Across all doses of irradiation, counts were consistently lower for cantaloupe pieces obtained from melons that had been subjected to chlorine rinse in comparison with those washed with water without chlorine. Melons washed with chlorine before cutting had total aerobic bacterial counts of 2.7, 0.7, and 0.5 log CFU/g on day 0 at irradiation doses of 0, 0.7, and 1.4 kGy, respectively. Objective color analysis indicated no significant effect of irradiation on the color of cantaloupe. Texture measured as compression force was lower only for cantaloupe irradiated at 1.4 kGy. Irradiation did not affect descriptive attribute flavor and texture sensory attributes of cantaloupe pieces. Decontamination of whole cantaloupes before cutting using chlorine wash may be combined with low-dose irradiation for shelf-life extension of sliced cantaloupe MH - Mexico|Jalisco MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 5 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000225959800032 L2 - electron beam irradiation;aerobic plate count;cantaloupe;chlorine;sensory analysis;MINIMALLY PROCESSED CANTALOUPE; FRESH-CUT CANTALOUPE; SHELF-LIFE; STRAWBERRIES; SALMONELLA; HONEYDEW; FRUITS; MELONS SO - Journal of Food Science 2004 ;69(9):M267-M273 11921 UI - 5535 AU - Palencia H AU - Garcia-Jimenez F AU - Takacs JM AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Nebraska, Dept Chem, Lincoln, NE 68588, USATakacs, JM, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Suzuki-Miyaura coupling with high turnover number using an N-acyl-N-heterocyclic carbene palladacycle precursor AB - A simple N-acylimidazolium salt precursor to a NVIC-complexed palladacyclic ligand gives high turnover numbers (>10(7)) for Suzuki-Miyaura coupling and is applied to the preparation of biaryls used in the synthesis of coumarins. The results suggest that N-acyl-NHC derivatives can contribute to further expanding the rich chemistry of NHCs. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 28 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000221201900001 L2 - N-acyl-N-heterocyclic carbene;N-heterocyclic carbene ligand;NHC;Suzuki-Miyaura coupling;coumarin synthesis;biaryls;palladium catalyst;catalysis;CATALYZED BISDIENE CARBOCYCLIZATIONS; ARYL BROMIDES; C-C; HOMOGENEOUS CATALYSIS; HECK REACTIONS; PALLADIUM; COMPLEXES; LIGANDS; CHLORIDES; ALCOHOLS SO - Tetrahedron Letters 2004 ;45(20):3849-3853 11922 UI - 4699 AU - Palma A AU - Sandoval L AU - Martin M AU - Lefebvre R AD - INAOE, Puebla 72000, MexicoBUAP, Fac Ciencias Computac, Puebla 72000, MexicoLab Photophys Mol, Van Nuys, CA 91405, USAUniv Paris 06, UFR Phys Fundamentale & Appl, F-75230 Paris, FranceLefebvre, R, INAOE, Apdo Postal 51&216, Puebla 72000, Mexico TI - Second quantization and Floquet quasienergies of the parabolic barrier AB - in this work we show how to find the Floquet quasienergies of a parabolic barrier Hamiltonian interacting with a periodic field mode using a convenient definition of ladder operators. Although these operators are not adjoint to each other in the configuration space, they, however, keep all the other properties of the usual ladder operators for the harmonic oscillator. We also use the Bargmann-Segal representation to find the eigenvalues and eigenfunctions of the parabolic barrier in a straightforward way. The use of second-order perturbation theory and the Bogoliubov-Tyablikov transformation enables us to obtain the Floquet shift by utilizing only the algebraic properties of these ladder operators. (C) 2004 Wiley Periodicals, Inc MH - France MH - Mexico|Puebla MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000223189000032 L2 - Floquet theory;parabolic barrier;second quantization;Bogoliubov-Tyablikov transformation;non-hermitian quantum mechanics;STATES; ATOMS SO - International Journal of Quantum Chemistry 2004 ;99(4):484-487 11923 UI - 4909 AU - Palma E AU - Ragozzino DA AU - Di Angelantonio S AU - Spinelli G AU - Trettel F AU - Martinez-Torres A AU - Torchia G AU - Arcella A AU - Di Gennaro G AU - Quarato PP AU - Esposito V AU - Cantore G AU - Miledi R AU - Eusebi F AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Queretaro, MexicoUniv Roma La Sapienza, Inst Pasteur, Fdn Cenci Bolognetti, I-00185 Rome, ItalyUniv Roma La Sapienza, Ctr Eccellenza Biol & Med Mol, Dipartimento Fisiol Umana & Farmacol, I-00185 Rome, ItalyNeuromed Ist Ricovero & Cura Carattere Sci, I-86077 Isernia, ItalyUniv Calif Irvine, Dept Neurobiol & Behav, Cellular & Mol Neurobiol Lab, Irvine, CA 92697, USAMiledi, R, Univ Nacl Autonoma Mexico, Inst Neurobiol, AP1-1, Queretaro, Mexico TI - Phosphatase inhibitors remove the run-down of gamma-aminobutyric acid type A receptors in the human epileptic brain AB - The properties of gamma-aminobutyric acid (GABA) type A receptors (GABA(A) receptors) microtransplanted from the human epileptic brain to the plasma membrane of Xenopus oocytes were compared with those recorded directly from neurons, or glial cells, in human brains slices. Cell membranes isolated from brain specimens, surgically obtained from six patients afflicted with drug-resistant temporal lobe epilepsy (TLE) were injected into frog oocytes. Within a few hours, these oocytes acquired GABA(A) receptors that generated GABA currents with an unusual run-down, which was inhibited by orthovanadate and okadaic acid. In contrast, receptors derived from membranes of a nonepileptic hippocampal uncus, membranes from mouse brain, or recombinant rat alpha1beta2gamma2-GABA receptors exhibited a much less pronounced GABA-current rundown. Moreover, the GABA(A) receptors of pyramidal neurons in temporal neocortex slices from the same six epileptic patients exhibited a stronger run-down than the receptors of rat pyramidal neurons. Interestingly, the GABA(A) receptors of neighboring glial cells remained substantially stable after repetitive activation. Therefore, the excessive GABA-current run-down observed in the membrane-injected oocytes recapitulates essentially what occurs in neurons, rather than in glial cells. Quantitative RT-PCR analyses from the same TLE neocortex specimens revealed that GABA(A)-receptor beta1, beta2, beta3, and gamma2 subunit mRNAs were significantly overexpressed (8- to 33-fold) compared with control autopsy tissues. Our results suggest that an abnormal GABA-receptor subunit transcription in the TLE brain leads to the expression of run-down-enhanced GABA(A) receptors. Blockage of phosphatases stabilizes the TLE GABA(A) receptors and strengthens GABAergic inhibition. It may be that this process can be targeted to develop new treatments for intractable epilepsy MH - Italy MH - Mexico|Queretaro MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 16 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000222534200044 L2 - temporal lobe epilepsy;microtransplantation into Xenopus oocyte;okadaic acid;gamma-aminobutyric acid-current run-down;human tissue slices;TEMPORAL-LOBE EPILEPSY; MESSENGER-RNA EXPRESSION; PROTEIN-KINASE-C; XENOPUS-OOCYTES; NEUROTRANSMITTER RECEPTORS; TYROSINE PHOSPHORYLATION; SYNAPTIC INHIBITION; NEUROTROPHIC FACTOR; GLIAL-CELLS; HIPPOCAMPUS SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(27):10183-10188 11924 UI - 5540 AU - Palmer M AU - Bernhardt E AU - Chornesky E AU - Collins S AU - Dobson A AU - Duke C AU - Gold B AU - Jacobson R AU - Kingsland S AU - Kranz R AU - Mappin M AU - Martinez ML AU - Micheli F AU - Morse J AU - Pace M AU - Pascual M AU - Palumbi S AU - Reichman OJ AU - Simons A AU - Townsend A AU - Turner M AD - Univ Maryland, College Pk, MD 20742, USADuke Univ, Durham, NC, USAUniv Calif Santa Cruz, Santa Cruz, CA 95064, USAUniv New Mexico, Albuquerque, NM 87131, USAPrinceton Univ, Princeton, NJ 08544, USAEcol Soc Amer, Washington, DC, USADavid & Lucile Packard Fdn, Los Altos, CA, USAUS Geol Survey, Columbia, MD, USAJohns Hopkins Univ, Baltimore, MD, USAUniv Calgary, Calgary, AB T2N 1N4, CanadaInst Ecol, Xalapa, Veracruz, MexicoStanford Univ, Pacific Grove, CA, USAInst Ecosyst Studies, Millbrook, NY 12545, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv Calif Santa Barbara, Santa Barbara, CA 93106, USACOMPASS, Washington, DC, USAUniv Colorado, Boulder, CO 80309, USAUniv Wisconsin, Madison, WI, USAPalmer, M, Univ Maryland, College Pk, MD 20742, USA TI - Ecology for a crowded planet MH - Canada MH - Mexico|Veracruz MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 61 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000221669600023 SO - Science 2004 ;304(5675):1251-1252 11925 UI - 3790 AU - Palomares LO AU - Reyes JA AU - Barbero G AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoPolitecn Turin, Dipartimento Fis, I-10129 Turin, ItalyINFM, I-10129 Turin, ItalyBarbero, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Optical response of a nematic sample submitted to a periodic external electric field: role of the ionic impurities AB - The influence of the ions dissolved in a nematic liquid crystals on the optical response of a nematic sample submitted to a periodic square wave is investigated. We show that according to the density of ions and of the properties of the dielectric layer deposited on the electrodes to avoid charge injection, different regimes for the optical phase difference are found. The role of the mobility of the ions on the phenomenon is investigated. We suppose that the diffusion current is negligible with respect to the drift current. In this framework, the electrical problem relevant to the back electric field due to the redistribution of the ions is solved analytically. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000225351800022 L2 - VOLTAGE; CELL SO - Physics Letters A 2004 ;333(1-2):157-163 11926 UI - 4442 AU - Palov A AU - Keer-Rendon A AU - Arriaga JCC AU - Devonshire R AD - Univ Sheffield, Chem Dept, High Temp Sci Labs, Sheffield S3 7HF, S Yorkshire, EnglandCIMAV, Chih 31109, MexicoPalov, A, Univ Sheffield, Chem Dept, High Temp Sci Labs, Sheffield S3 7HF, S Yorkshire, England TI - 3-D modelling of time-dependent, low-pressure discharges using commercial CFD software MH - United Kingdom MH - Mexico|Chihuahua PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - S;Article AV - English IS - 0951-3248 UR - ISI:000223655300264 SO - Light Sources 2004 2004 ;(182):641-642 11927 UI - 5655 AU - Panayotaros P AD - Univ Colorado, Dept Appl Math, Boulder, CO 80309, USAPanayotaros, P, UNAM, IIMAS, Dept Matemat & Mecan, Apdo,Postal 20-726, Mexico City 01000, DF, Mexico TI - Quartic normal forms for the periodic nonlinear Schrodinger equation with dispersion management AB - We investigate Birkhoff normal forms for the periodic nonlinear Schrodinger equation with dispersion management. The normalization we describe is related to averaging arguments considered in the literature, and has the advantage of producing fewer resonant couplings between high spatial frequency modes. One consequence is that the normal form equations have invariant subspaces of large but finite dimension, where we can find several classes of periodic orbits. The formal arguments apply to other related dispersive systems, and to normal forms of high order. We also present a rigorous version of the normal form calculation and show that solutions of the quartic normal form equations remain close to solutions of the full system over a time that is inversely proportional to a small nonlinearity parameter. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0167-2789 UR - ISI:000220999200003 L2 - nonlinear Schrodinger equations;parametric forcing;normal forms;PULSE DYNAMICS; OPTICAL FIBERS; SOLITONS; SYSTEMS; THEOREM; OSCILLATIONS; PROPAGATION SO - Physica D-Nonlinear Phenomena 2004 ;191(3-4):219-237 11928 UI - 5919 AU - Panayotaros P AD - Univ Colorado, Dept Appl Math, Boulder, CO 80309, USAPanayotaros, P, Univ Nacl Autonoma Mexico, Dept Matemat & Mecan, IIMAS, Apdo Postal 20-726, Mexico City 01000, DF, Mexico TI - Averaging and Benjamin-Feir instabilities in a parametrically forced nonlinear Schrodinger equation AB - We study small amplitude solutions of a parametrically forced nonlinear Schrodinger equation, and give exact expressions for the quartic resonant mode interactions by analyzing the corresponding Diophantine equations. We use this information to find some classes of periodic orbits of the averaged equation and characterize the linearly unstable directions of Stokes wave solutions. (C) 2004 Published by Elsevier B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000220317300011 L2 - nonlinear Schrodinger equations;parametric forcing;normal forms;DISPERSION MANAGEMENT; PULSE DYNAMICS; SYSTEMS; INVARIANTS; SOLITON; ZERO SO - Physics Letters A 2004 ;323(5-6):403-414 11929 UI - 3831 AU - Pancharatna PD AU - Mendez-Rojas MA AU - Merino G AU - Vela A AU - Hoffmann R AD - Univ Amer Puebla, Dept Quim & Biol, Puebla 72820, MexicoCornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853, USATU Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, GermanyCtr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoHoffmann, R, Univ Amer Puebla, Dept Quim & Biol, Ex-Hda Sta Catarina Martir,AP 100, Puebla 72820, Mexico TI - Planar tetracoordinate carbon in extended systems AB - A recently proposed system with a central planar tetracoordinate carbon linking two three-membered rings, C-5(2-), lends itself to extension in one, two, and three dimensions. Our construction of potential realizations begins with an analysis of the electronic structure of C-5(2-). Dimers such as C10Li3-, C10Li4, and a trimer C15Li6 are then examined, and their geometries are optimized to find clues for ways the C-5(2-) unit may polymerize in the presence of countercations. Coordination through the terminal carbons is favored in the oligomers and polymers; several electronically and structurally reasonable systems of the stoichiometry C5Mx (M = Li, x = 2; M = Be, Pt, Zn, x = 1) emerge from band structure calculations and energetic considerations MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0002-7863 UR - ISI:000225233600053 L2 - TOTAL-ENERGY CALCULATIONS; MOLECULAR-DYNAMICS; THEORETICAL DESIGN; BASIS-SET; HYDROCARBONS; DENSITY; METALS SO - Journal of the American Chemical Society 2004 ;126(46):15309-15315 11930 UI - 4246 AU - Pandarinath K AU - Verma SP AU - Yadava MG AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoPhys Res Lab, Div Earth Sci, Ahmedabad 380009, Gujarat, IndiaPandarinath, K, UNAM, Ctr Invest Energia, Priv Xochicalco S No,Col Ctr,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Dating of sediment layers and sediment accumulation studies along the western continental margin of India: A review AB - Modern surface sediments and organic matter/peat in sediment cores along the western continental margin of India have been dated by excess Pb-210 and conventional or accelerator mass spectrometry C-14 techniques. We have established an extensive database of these radiometric dates and related parameters, and have calculated sedimentation rates. Modern sedimentation rates are higher (1.8-19.0 mm/yr) on the continental margin of northwestern India and decline (0.01-2.6 mm/yr) toward the southwest. This trend is attributed to differences in load-carrying capacity of the rivers and lithology of the adjacent hinterland. Sedimentation rates decrease away from the coast, except fur higher sedimentation rates at few places on the mid-slope compared to inner slope regions. The data reveal lateral as well as temporal variations in accumulation rates, which are explained in terms of environment of deposition and paleomonsoon conditions. The onset of intensive monsoonal conditions during the Holocene is reflected in very high sedimentation rates on the inner shelf. Peat and carbonized wood layers in the inner shelf cores are of Early Holocene age and indicate marine transgression. Age inversions in the cores of continental shelf and slope regions are attributed to either sediment slumping or reworking and redeposition of foraminifera shells. This study provides additional information to the worldwide database for continental margin sedimentation, and is useful for understanding Late Quaternary sedimentation records, sea level changes, the Holocene marine transgression event, the role of Last Glacial Maxima (LGM), and climatic changes in the input of terrigenous sediments to continental margins MH - India MH - Mexico|Morelos PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 2 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000224214800004 L2 - LATE-QUATERNARY; ARABIAN-SEA; RADIOCARBON-DATES; CLAY MINERALOGY; NEW-JERSEY; SHELF; MONSOON; COAST; SLOPE; RECORD SO - International Geology Review 2004 ;46(10):939-956 11931 UI - 4717 AU - Paneque M AU - Poveda ML AU - Santos LL AU - Salazar V AU - Carmona E AD - Univ Sevilla, CSIC, Inst Invest Quim, Seville 41092, SpainUniv Autonoma Estado Hidalgo, CIQ, Pachuca, Hidalgo, MexicoPaneque, M, Univ Sevilla, CSIC, Inst Invest Quim, Avda Amer Vespucio S-N, Seville 41092, Spain TI - Iridium solutes effect C-H bond activation and C-C bond forming reactions of C6H6-MeOCH2CH2OMe solvent mixtures AB - The in situ generated [Tp(Me2)Ir((CH5)-H-6)(2)] fragment induces both aromatic and aliphatic C-H bond activation reactions, along with C-C bond formation, when heated with benzene and 1,2-dimethoxyethane MH - Mexico|Hidalgo MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000223241300027 L2 - ELIMINATION; COMPLEXES SO - Chemical Communications 2004 ;(16):1838-1839 11932 UI - 5656 AU - Paniagua R AU - Ventura MD AU - Rodriguez E AU - Sil J AU - Galindo T AU - Hurtado ME AU - Alcantara G AU - Chimalpopoca A AU - Gonzalez I AU - Sanjurjo A AU - Barron L AU - Amato D AU - Mujais S AD - IMSS, Hosp Especialidades Ctr Med Nacl Siglo XXI, Unidad Invest Med Enfermedades Nefrol, Mexico City, DF, MexicoIMSS, Hosp Gen Reg Gabriel Mancera, Mexico City, DF, MexicoIMSS, Hosp Gen Reg 25, Mexico City, DF, MexicoIMSS, Hosp Gen Zona 8, Mexico City, DF, MexicoIMSS, Hosp Gen Zona 32, Mexico City, DF, MexicoBaxter Healthcare Corp, Deerfield, IL 60015, USAPaniagua, R, IMSS, Ctr Med Nacl SXXI, Unidad Congresos, 4 Piso,Bloque B,Av Cuauhtemoc 330, Col Doctores 06725, DF, Mexico TI - Impact of fill volume on peritoneal clearances and cytokine appearance in peritoneal dialysis AB - Background: Current adequacy guidelines for peritoneal dialysis encourage the use of large fill volumes for the attainment of small solute clearance targets. These guidelines have influenced clinical practice in a significant way, and adoption of higher fill volumes has become common in North America. Several studies, however, have challenged the relevance of increasing small solute clearance; this practice may result in untoward consequences in patients. Objective: The present study was designed to explore the relationship between dialysate volume and the clearance of different sized molecules, fluid dynamics, and appearance of peritoneal cytokines. Methods: Thirteen adult prevalent patients on continuous ambulatory peritoneal dialysis were studied. Three different dialysate volumes (2.0, 2.5, and 3.0 L) were infused on consecutive days in a random order. Several measurements of peritoneal fluid dynamics (intraperitoneal pressure, net ultrafiltration, fluid absorption), solute clearances (urea, creatinine, beta(2)-microglobulin, albumin, IgG, and transferrin), and appearance of interleukin-6 and tumor necrosis factor alpha (TNFalpha) were assessed. Results: Increase in dialysate fill volume (from 2 to 2.5 to 3 L) was examined in relationship to body surface area (BSA). The dialysate volume/BSA (DV/BSA) ratio increased from 1262 to 1566 to 1871 mL/m(2) on 2.0, 2.5, and 3.0 L dialysate volumes, respectively. In parallel, diastolic blood pressure increased from 82.7+/-8.8 to 87.0+/-9.5 to 92+/-8.3 mmHg (p<0.05). Net ultrafiltration rate also increased, from 0.46&PLUSMN;0.48 to 0.72&PLUSMN;0.42 to 0.97&PLUSMN;0.49 mL/minute (p<0.01), despite a concomitant increase in fluid absorption, from 1.05+/-0.34 to 1.21+/-0.40 to 1.56+/-0.22 mL/min (p<0.01). Urea peritoneal clearance increased from 8.27&PLUSMN;0.68 to 9.92&PLUSMN;1.6 to 12.98&PLUSMN;4.03 mL/min (p<0.01); creatinine peritoneal clearance increased from 6.69+/-1.01 to 7.64+/-1.12 to 8.69+/-1.76 mL/min (p<0.01). Clearance of the other measured molecules did not change. Appearance of interleukin-6 increased 17% and 43% (p<0.01), and TNFalpha appearance increased 14% and 50% (p<0.01) when dialysate volumes of 2.5 and 3.0 L were used, compared with 2.0 L. Conclusions: These results show that, with higher values of DV/BSA ratio, small solute peritoneal clearance is increased, but clearances of large molecules remain unchanged. With the use of higher volumes, fluid absorption rate and the appearance of proinflammatory cytokines in the dialysate are increased MH - Mexico|Distrito Federal MH - USA PB - TORONTO: MULTIMED INC RP - NOT IN FILE U3 - TC 4 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0896-8608 UR - ISI:000220943300006 L2 - fill volume;intraperitoneal pressure;peritoneal clearances;ultrafiltration;cytokines;RESIDUAL RENAL-FUNCTION; INTRAPERITONEAL PRESSURE; SOLUTE TRANSPORT; CELL VIABILITY; BODY-SIZE; CHILDREN; CAPD; PRESCRIPTION; ADEQUACY; FLUID SO - Peritoneal Dialysis International 2004 ;24(2):156-162 11933 UI - 3513 AU - Papachristou PK AU - Diakonos FK AU - Constantoudis V AU - Schmelcher P AU - Benet L AD - Univ Athens, Dept Phys, GR-15771 Athens, GreeceNCSR Demokritos, IMEL, Athens 15310, GreeceNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceUniv Heidelberg, Inst Phys Chem, D-69120 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-69120 Heidelberg, GermanyUNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoPapachristou, PK, Univ Athens, Dept Phys, GR-15771 Athens, Greece TI - Scattering off two oscillating disks: Dilute chaos AB - We investigate the role of the unstable periodic orbits and their manifolds in the dynamics of a time-dependent two-dimensional scattering system. As a prototype we use two oscillating disks on the plane with the oscillation axes forming an angle theta. The phase space of the system is five dimensional and it possesses a variety of families of unstable periodic orbits (UPOs) with intersecting manifolds. We perform numerical experiments to probe the structure of distinct scattering functions, in one and two dimensions, near the location of the UPOs. We find that the corresponding manifolds occur only in a very particular and localized way in the high-dimensional phase space. As a consequence the underlying fractal structure is ubiquitous only in higher-dimensional, e.g., two-dimensional, scattering functions. Both two-dimensional and one-dimensional scattering functions are dominated by seemingly infinite sequences of discontinuities characterized by small values of the magnitude of the projectile's outgoing velocity. These peaks accumulate toward the phase-space locations of the UPOs, with a rate which monotonically depends on the corresponding instability exponent. They represent the intersections of the set of the initial conditions with invariant sets of larger dimensionality embedded in the phase space of the system, which are not directly related with the UPOs. We adopt the term "dilute chaos" to characterize these phenomenological aspects of the scattering dynamics MH - Germany MH - Greece MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000225970700063 L2 - RESTRICTED 3-BODY PROBLEM; SINGULARITIES SO - Physical Review e 2004 ;70(5): 11934 UI - 5902 AU - Paredes G AU - Lopez-Oyama A AU - randa-Espinoza H AU - Maldonado A AD - Univ Sonora, DIPA, Hermosillo, Sonora, MexicoUniv Sonora, Dept Ciencias QuimicoBiol, Hermosillo, Sonora, MexicoUniv Penn, Inst Med & Engn, Philadelphia, PA, USAUniv Sonora, Dept Fis, Hermosillo, Sonora, Mexico TI - Structure of SOPC : SOPS vesicles MH - Mexico|Sonora MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000187971200193 SO - Biophysical Journal 2004 ;86(1):38A-38A 11935 UI - 4857 AU - Paredes RG AU - Agmo A AD - Univ Tromso, Dept Psychol, N-9037 Tromso, NorwayUniv Nacl Autonoma Mexico, Inst Neurobiol, Queretaro, MexicoAgmo, A, Univ Tromso, Dept Psychol, N-9037 Tromso, Norway TI - Has dopamine a physiological role in the control of sexual behavior? A critical review of the evidence AB - The role of dopaminergic systems in the control of sexual behavior has been a subject of study for at least 40 years. Not surprisingly, reviews of the area have been published at variable intervals. However, the earlier reviews have been summaries of published research rather than a critical analysis of it. They have focused upon the conclusions presented in the original research papers rather than on evaluating the reliability and functional significance of the data reported to support these conclusions. During the last few years, important new knowledge concerning dopaminergic systems and their behavioral functions as well as the possible role of these systems in sexual behavior has been obtained. For the first time, it is now possible to integrate the data obtained in studies of sexual behavior into the wider context of general dopaminergic functions. To make this possible, we first present an analysis of the nature and organization of sexual behavior followed by a summary of current knowledge about the brain structures of crucial importance for this behavior. We then proceed with a description of the dopaminergic systems within or projecting to these structures. Whenever possible, we also try to include data on the electrophysiological actions of dopamine. Thereafter, we proceed with analyses of pharmacological data and release studies, both in males and in females. Consistently throughout this discussion, we make an effort to distinguish pharmacological effects on sexual behavior from a possible physiological role of dopamine. By pharmacological effects, we mean here drug-induced alterations in behavior that are not the result of the normal actions of synaptically released dopamine in the untreated animal. The conclusion of this endeavor is that pharmacological effects of dopaminergic drugs are variable in both males and females, independently of whether the drugs are administered systemically or intracerebrally. We conclude that the pharmacological data basically reinforce the notion that dopamine is important for motor functions and general arousal. These actions could, in fact, explain most of the effects seen on sexual behavior. Studies of dopamine release, in both males and females, have focused on the nucleus accumbens, a structure with at most a marginal importance for sexual behavior. Since accumbens dopamine release is associated with all kinds of events, aversive as well as appetitive, it can have no specific effect on sexual behavior but promotes arousal and activation of non-specific motor patterns. Preoptic and paraventricular nucleus release of dopamine may have some relationship to mechanisms of ejaculation or to the neuroendocrine consequences of sexual activity or they can be related to other autonomic processes associated with copulation. There is no compelling indication in existing experimental data that dopamine is of any particular importance for sexual motivation. There is experimental evidence showing that it is of no importance for sexual reward. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Queretaro MH - Norway PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 23 U4 - Neurosciences U5 - J;Review AV - English IS - 0301-0082 UR - ISI:000222863300002 L2 - MEDIAL PREOPTIC AREA; CONDITIONED PLACE PREFERENCE; NUCLEUS-ACCUMBENS DOPAMINE; MALE COPULATORY-BEHAVIOR; FEMALE SYRIAN-HAMSTERS; RATS RATTUS-NORVEGICUS; VENTRAL TEGMENTAL AREA; PACED MATING-BEHAVIOR; IN-VIVO MICRODIALYSIS; QUANTITATIVE AUTORADIOGRAPHIC LOCALIZATION SO - Progress in Neurobiology 2004 ;73(3):179-226 11936 UI - 3691 AU - Parra-Olea G AU - Canseco-Marquez L AU - Garcia-Paris M AD - UNAM, Inst Biol, Mexico City 04510, DF, MexicoUNAM, Museo Zool, Dept Evolut Biol, Fac Ciencias, Mexico City 04510, DF, MexicoCSIC, Museo Nacl Ciencias Nat, Madrid 28006, SpainParra-Olea, G, UNAM, Inst Biol, AP 70-153, Mexico City 04510, DF, Mexico TI - A morphologically distinct new species of Pseudoeurycea (Caudata : Plethodontidae) from the Sierra Madre Oriental of Puebla, Mexico AB - A new species of Pseudocurycea is described from cloud forests of the Sierra Madre Oriental of Puebla, Mexico. The new species is distinguished from all other Pseudoeurycea by its small size, stout body, short tail, large nostrils, presence of characteristic glandular convergent ridges on the pelvic region and the tail, and by its distinctive limb structure, with very small hands and feet that are extensively webbed and bear prominent but short and pointy middle digits. The only apparent close relative of this species is P. praecellens, from which it differs by the position and distribution of the dorsal and caudal glands, body proportions, nostril size and coloration. All specimens of the new species were found in cloud forest, under a canopy of Liquidambar, Quercus, and arborescent ferns, as well as in a coffee grove. The elevational range for the species is narrow, between 905 and 1400 m, unusually low elevations for Pseudoeurycea MH - Mexico|Distrito Federal MH - Spain PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000225694400010 L2 - Caudata;Mexico;new species;North America;Plethodontidae;Pseudoeusycea;taxonomy;SALAMANDERS; OAXACA SO - Herpetologica 2004 ;60(4):478-484 11937 UI - 5437 AU - Parra-Olea G AU - Garcia-Paris M AU - Hanken J AU - Wake DB AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoCSIC, Museo Nacl Ciencias Nat, E-28006 Madrid, SpainHarvard Univ, Museum Comparat Zool, Cambridge, MA 02138, USAUniv Calif Berkeley, Museum Comparat Zool, Berkeley, CA 94720, USAParra-Olea, G, Univ Nacl Autonoma Mexico, Inst Biol, AP 70-153, Mexico City 04510, DF, Mexico TI - A new species of arboreal salamander (Caudata : Plethodontidae : Pseudoeurycea) from the mountains of Oaxaca, Mexico AB - Recent surveys of the plethodontid salamander fauna of Oaxaca, Mexico, disclosed the existence of a new, morphologically distinct arboreal species of the genus Pseudoeurycea. The new species, described here, is from the Sierra Mazateca in northern Oaxaca. Sequences of 1833 base pairs of the 16S, cytochrome b and ND4 mitochondrial DNA ( mtDNA) genes from the new taxon were used to assess its phylogenetic position. Previous phylogenetic analyses based on mtDNA supported recognition of four clades within Pseudoeurycea: P. bellii, P. gadovii, P. juarezi and P. leprosa-Lineatriton species groups. One additional species, P. unguidentis, was not closely allied to any of the four groups. Re-analysis including the additional sequences reported here establishes a sister-group relationship between the new species and P. unguidentis. Moreover, it supports this clade as part of the P. juarezi species group MH - Mexico|Distrito Federal MH - Spain MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0022-2933 UR - ISI:000221581600007 L2 - Amphibia;Caudata;Plethodontidae;Pseudoeurycea;new species;systematics;taxonomy;Mexico;PHYLOGENETIC-RELATIONSHIPS; MITOCHONDRIAL GENOME; DNA; SUBSTITUTION; LIKELIHOOD; SEQUENCE; CONFIDENCE; BOOTSTRAP; MODEL SO - Journal of Natural History 2004 ;38(16):2119-2131 11938 UI - 5851 AU - Parra-Olea G AU - Garcia-Paris M AU - Wake DB AD - Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USACSIC, Museo Nacl Ciencias Nat, E-28006 Madrid, SpainUNAM, Inst Biol, Mexico City, DF, MexicoWake, DB, Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720 USA TI - Molecular diversification of salamanders of the tropical American genus Bolitoglossa (Caudata : Plethodontidae) and its evolutionary and biogeographical implications AB - The largest genus of salamanders, Bolitoglossa (Plethodontidae), is widespread in tropical America, where it occurs in diverse habitats and elevations, from high elevation grasslands to lowland rain forest. It has the most extensive geographical range of any salamander genus. While most species occur in Middle America, it ranges throughout most of tropical South America as well. Phylogenetic analysis of 1196 bp of two mitochondrial genes (cytochrome b, 16S RNA) from 55 species offers strong support for the monophyly of the genus and sorts the species into a number of clades. Taking into account morphology, distribution, general ecology, and prior systematic and taxonomic studies, we recognize seven subgenera, four of them new: Bolitoglossa Dumeril, Bibron et Dumeril, 1854, Eladinea Miranda Ribeiro, 1937, Magnadigita Taylor, 1944, Mayamandra, Nanotriton, Oaxakia and Pachymandra. All South American and some lower Middle American species are included in a single well supported clade, Eladinea. At the species level our analyses uncover the existence of large genetic diversity within morphologically homogeneous taxa. We propose the new combination: B. (Eladinea) paraensis (Unterstein, 1930) stat. nov., for Brazilian salamanders previously included under B. altamazonica. We evaluate evidence for the multiple colonization of the tropical lowlands by morphologically derived species groups. South America was invaded by members of one clade, Eladinea, which we infer to have dispersed to South America prior to closure of the Panamanian Portal. Despite the relatively long history of salamanders in South America, that continent now accounts for a relatively small proportion of the lineages and species of neotropical salamanders. (C) 2004 The Linnean Society of London, MH - USA MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Evolutionary Biology U5 - J;Article AV - English IS - 0024-4066 UR - ISI:000220505200002 L2 - biogeography;Middle America;mtDNA;new taxa;phylogeny;South America;systematics;NEOTROPICAL SALAMANDER; DNA-SEQUENCES; MORPHOLOGICAL DIVERSIFICATION; PHYLOGENETIC-RELATIONSHIPS; GENETIC DIFFERENTIATION; MITOCHONDRIAL GENOME; GROUP AMPHIBIA; SUBSTITUTION; LIKELIHOOD; AMPLIFICATION SO - Biological Journal of the Linnean Society 2004 ;81(3):325-346 11939 UI - 4731 AU - Parra-Tabla V AU - Vargas CF AD - Univ Autonoma Yucatan, Dept Ecol, Merida 97100, Yucatan, MexicoEstac Biol Donana, CSIC, E-41013 Seville, SpainInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Zool, Mexico City 11340, DF, MexicoParra-Tabla, V, Univ Autonoma Yucatan, Dept Ecol, Campus Ciencias Biol & Agropecuarias,AP 4-116,Col, Merida 97100, Yucatan, Mexico TI - Phenology and phenotypic natural selection on the flowering time of a deceit-pollinated tropical orchid, Myrmecophila christinae AB - Background and aims. Flowering phenology is described and the effect of flowering time on pollination success is evaluated in the deceit-pollinated tropical orchid, Myrmecophila christinae. It was expected that, due to this species' deceit pollination strategy and low observed pollinator visit rate, there would be a higher probability of natural selection events favouring individuals flowering away from the population flowering peak. Methods. The Study covers two consecutive years and four populations of M. christinae located along the north coast of the Yucatan Peninsula. For phenological and pollination success data, a total of 110 individuals were monitored weekly in 1998, and 83 individuals in 1999, during all the flowering and fruiting season. Key results. The results showed significant differences in the probability of donating and receiving pollen throughout the flowering season. The probability of receiving or donating pollen increased the further an individual flowering was from the flowering peak. Regression analysis showed directional and disruptive phenotypic natural selection gradients, suggesting the presence of selection events unfavourable to flowering during flowering peak, for both male success (pollen removal) and female Success (fruit production). However, the intensity and significance of the natural selection events varied between populations from year to year. The variation between seasons and populations was apparently due to variations in the density of reproductive individuals in each population and each season. Conclusions. As in other deceit-pollinated orchids, natural selection in M. christinae favours individuals flowering early or late in relation to population peak flowering. However, results also suggested a fluctuating regime of selective events act on flowering time of M. christinae. (C) 2004 Annals of Botany Company MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Spain PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Plant Sciences U5 - J;Article AV - English IS - 0305-7364 UR - ISI:000223249400006 L2 - deceit pollination;flowering time;fluctuating natural selection;negative frequency-dependent selection;Mexico;Myrmecophila christinae;Orchidaceae;tropical perennial plant;phenology;phenotypic natural selection;FREQUENCY-DEPENDENT SELECTION; REPRODUCTIVE SUCCESS; DECEPTIVE ORCHID; PLANT; SYNCHRONY; SIZE; FRAGMENTATION; CHARACTERS; ABUNDANCE; PHYLOGENY SO - Annals of Botany 2004 ;94(2):243-250 11940 UI - 3776 AU - Parsamian ES AU - Mujica R AD - VA Ambartsumyan Byurakan Astrophys Observ, Byurakan, ArmeniaNatl Inst Astrophys Opt & Elect, Puebla, MexicoParsamian, ES, VA Ambartsumyan Byurakan Astrophys Observ, Byurakan, Armenia TI - Spectral observations of subfuors (exors). II. V1143 Ori AB - Spectral observations of the subfuor (exor) V 1143 Ori during the outburst of 1992-93 are reported. Data on the behavior of the Ca II infrared triplet before and during the outburst are presented for the first time. The amplitudes of the outbursts during 1982-94 show that their maxima do not vary greatly on the average. Between outbursts, when the star is in the minimum of its active period, the spectrum of V 1143 Ori is typical of a WTTS and during an outburst, of a CTTS MH - Armenia MH - Mexico|Puebla PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0571-7256 UR - ISI:000225538000001 L2 - stars : flare;individual : V1143 Ori;T-TAURI STARS; LINE SO - Astrophysics 2004 ;47(4):433-442 11941 UI - 4273 AU - Pascale F AU - Tosoni S AU - Zicovich-Wilson C AU - Ugliengo P AU - Orlando R AU - Dovesi R AD - Univ Turin, Dipartimento Chim, IFM, I-10125 Turin, ItalyUniv Nancy 1, LCM3B, UMR 7036, CNRS, F-54506 Vandoeuvre Les Nancy, FranceUniv Autonoma Estado Moreles, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, ItalyUgliengo, P, Univ Turin, Dipartimento Chim, IFM, Via P Giuria 7, I-10125 Turin, Italy TI - Vibrational spectrum of brucite, Mg(OH)(2): a periodic ab initio quantum mechanical calculation including OH anharmonicity AB - The harmonic frequency spectrum of bulk Mg(OH)(2), brucite, has been computed with the CRYSTAL periodic code, using four different hamiltonians, namely Hartree-Fock (HF), local density (LDA), gradient corrected PW91 and hybrid B3LYP. The anharmonicity of the 011 stretching frequency has also been evaluated, as well as the transverse/longitudinal optical (TO/LO) splitting. Comparison with the frequencies of the single layer shows that the bulk OH stretching splitting is due to interlayer interaction. Agreement with experiment is excellent for B3LYP (less than 10 cm(-1) differences), less so for PW91 and much less satisfactory for both LDA and HF. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Italy MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 20 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000224190800016 L2 - CORRELATION-ENERGY; DENSITY; EXCHANGE; IMPLEMENTATION; SR(OH)(2); ACCURATE SO - Chemical Physics Letters 2004 ;396(4-6):308-315 11942 UI - 5836 AU - Pascale F AU - Zicovich-Wilson CM AU - Gejo FL AU - Civalleri B AU - Orlando R AU - Dovesi R AD - Univ Paris 06, Lab Petrol Modelisat Mat & Proc, F-75232 Paris 05, FranceUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyUniv Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, ItalyUnita INFM Torino, Sez F, I-10125 Turin, ItalyDovesi, R, Univ Paris 06, Lab Petrol Modelisat Mat & Proc, 4 Pl Jussieu, F-75232 Paris 05, France TI - The calculation of the vibrational frequencies of crystalline compounds and its implementation in the CRYSTAL code AB - The problem of numerical accuracy in the calculation of vibrational frequencies of crystalline compounds from the hessian matrix is discussed with reference to alpha-quartz (SiO2) as a case study and to the specific implementation in the CRYSTAL code. The Hessian matrix is obtained by numerical differentiation of the analytical gradient of the energy with respect to the atomic positions. The process of calculating vibrational frequencies involves two steps: the determination of the equilibrium geometry, and the calculation of the frequencies themselves. The parameters controlling the truncation of the Coulomb and exchange series in Hartree-Fock, the quality of the grid used for the numerical integration of the Exchange-correlation potential in Density Functional Theory, the SCF convergence criteria, the parameters controlling the convergence of the optimization process as well as those controlling the accuracy of the numerical calculation of the Hessian matrix can influence the obtained vibrational frequencies to some extent. The effect of all these parameters is discussed and documented. It is concluded that with relatively economical computational conditions the uncertainty related to these parameters is smaller than 2-4 cm(-1). In the case of the Local Density Approximation scheme, comparison is possible with recent calculations performed with a Density Functional Perturbation Theory method and a plane-wave basis set. (C) 2004 Wiley Periodicals, Inc MH - France MH - Italy MH - Mexico|Morelos PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 43 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000220573900012 L2 - CRYSTAL code;vibrational frequencies;crystalline compounds;a-quartz;DENSITY-FUNCTIONAL CALCULATIONS; INITIO LATTICE-DYNAMICS; HARTREE-FOCK GRADIENTS; GAUSSIAN-BASIS SETS; PERIODIC-SYSTEMS; PERTURBATION-THEORY; OPTIMIZATION; DERIVATIVES; CONSTANT; PHONONS SO - Journal of Computational Chemistry 2004 ;25(6):888-897 11943 UI - 4355 AU - Pascual C AU - Zenteno E AU - Cuzon G AU - Suarez J AU - Sanchez A AU - Gaxiola G AU - Taboada G AU - Maldonado T AU - Rosas C AD - UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Merida 97130, Yucatan, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoCtr Oceanol Pacifique, Taravao, Tahiti, Fr PolynesiaUniv Autonoma Campeche, Fac Ciencias Quim & Biol, Campeche, MexicoRosas, C, UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Calle 8 A 248,Vista Alegre Norte, Merida 97130, Yucatan, Mexico TI - Litopenaeus vannamei juveniles energetic balance and immunological response to dietary proteins AB - The present study was designed to evaluate the effect of dietary protein level on survival, assimilation efficiency and immunological condition of Litopenaeus vannamei juveniles using two protein levels in a range of optimal reported levels of 15% and 40% (equivalent to 15 and 40 g DP/kg BWd) and one extremely low (5% equivalent to 5 g DP/kg BWd). In order to reach this goal, effects of dietary protein level on energetic balance were recorded by ingestion rate (I), respiratory rate (R) and biomass production of L. vannamei during its growing process (P). Energy lost from feces (R) and urine products (U) was calculated as (H+ U) = I - R + P and assimilated energy (As) as R + P. At the end of the growth experiment, shrimp immune response, oxyhemocyanin (OxyHc), osmotic pressure and digestive gland glycogen were measured. Dietary protein level enhanced ingestion rate in shrimp fed 5 g DP/kg BWd compared to shrimp fed 40 g DP/kg BWd. However, daily growth coefficient (DGC, %)of L. vannamei juveniles was high in shrimp fed 40 g DP/kg BWd in comparison to shrimp fed 5 g DP/kg BWd. An inverse relation between wastes (H+ U) and dietary protein level was observed, indicating that shrimp loose 81% of ingested energy when fed 5 g DP/kg BWd and only 5.6% when fed 40 g DP/kg BWd. A higher assimilation and production efficiency (P/As) was obtained when shrimp were fed 40 g DP/kg BWd than that obtained in shrimp fed 15 or 5 g DP/kg BWd and an inverse relation between R and respiratory efficiency (R/AS) in relation to dietary protein levels was also observed. An increase in OxyHc was observed with increasing dietary proteinlevels indicating that shrimp accumulated protein as hemocyanin. A reduction of hemocytes occurred when shrimp were fed sub-optimal dietary protein levels indicating that zymogens contained in hemocytes, i.e., prophenoloxidase (ProPO) system, peneidins and their activities (phagocytosis, coagulation), were also reduced. A reduction on respiratory burst was observed indicating that suboptimal dietary protein level affected the number of cells and the phagocytosis capacity of cells. Notwithstanding, the compensatory mechanism used by L. vannamei to respond nutritional stress, sub-optimal dietary protein level (5 and 15 g DP/kg BWd) induced not only a severe reduction in growth rate and assimilation efficiency but also in immune capacities. (C) 2004 Elsevier B.V. All rights reserved MH - Fr Polynesia MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000224004700025 L2 - protein;production;oxygen consumption;assimilation;immune response;Litopenaeus vannamei;SHRIMP PENAEUS-CALIFORNIENSIS; HEMOLYMPH METABOLIC VARIABLES; SETIFERUS ADULT MALES; IMMUNE-RESPONSE; CLOTTING PROTEIN; HEAT INCREMENT; WHITE SHRIMP; PROPHENOLOXIDASE; CARBOHYDRATE; STYLIROSTRIS SO - Aquaculture 2004 ;239(1-4):375-395 11944 UI - 5309 AU - Pascual C AU - Zenteno E AU - Cuzon G AU - Sanchez A AU - Gaxiola G AU - Taboada G AU - Suarez J AU - Maldonado T AU - Rosas C AD - UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Merida 97130, Yucatan, VenezuelaUNAM, Fac Med, Dept Bioquim, Mexico City 04510, DF, MexicoCtr Oceanol Pacifique, Taravao, Tahiti, Fr PolynesiaUniv Autonoma Campeche, Fac Ciencias Quim & Biol, Campeche, MexicoRosas, C, UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Calle 8 A 248,Vista Alegre Norte, Merida 97130, Yucatan, Venezuela TI - Litopenaeus vannamei juveniles energetic balance and immunological response to dietary protein AB - The present study was designed to evaluate the effect of dietary protein level on survival, assimilation efficiency and immunological condition of Litopenaeus vannamei juveniles using two protein levels in a range of optimal reported levels of 15% and 40% (equivalent to 15 and 40 g DP/kg body weight/day [a DP/kg BWd]) and one extremely low (5% equivalent to 5 g DP/kg BWd). In order to reach this goal, effects of dietary protein level on energetic balance were recorded by ingestion rate (I), respiratory rate (R) and biomass production of L. vannamei during its growing process (P). Energy lost from feces (H) and urine products (U) was calculated as (H+U)=I-R+P and assimilated energy (As) as R+P. At the end of the growth experiment, shrimp immune response, oxyhemocyanin (OxyHc), osmotic pressure and digestive gland glycogen were measured. Dietary protein level enhanced ingestion rate in shrimp fed 5 g DP/kg BWd compared to shrimp fed 40 g DP/kg BWd. However, daily growth coefficient (DGC, %)of L. vannamei juveniles was high in shrimp fed 40 a DP/kg BWd in comparison to shrimp fed 5 g DP/kg BWd. An inverse relation between wastes (H+U) and dietary protein level was observed indicating that shrimp loose 81% of ingested energy when fed 5 g DP/kg BWd and only 5.6% when fed 40 g DP/kg BWd. A higher assimilation and production efficiency (P/As) was obtained when shrimp were fed 40 g DP/kg BWd, than obtained in shrimp fed 15 or 5 g DP/kg BWd and an inverse relation between R and respiratory efficiency (R/As) in relation to dietary protein levels was also observed. An increase in OxyHc was observed with increasing dietary protein levels indicating that shrimp accumulated protein as hemocyanin. A reduction of hemocytes occurred when shrimp were fed sub-optimal dietary protein levels indicating that zymogens contained in hemocytes, i.e., prophenoloxidase (ProPO) system, peneidins and their activities (phagocytosis, coagulation), were also reduced. A reduction on respiratory burst was observed indicating that sub-optimal dietary protein level affected the number of cells and the phagocytosis capacity of cells. Notwithstanding, the compensatory mechanism used by L. vannamei to respond nutritional stress, sub-optimal dietary protein level (5 and 15 g DP/kg BWd) induced not only a severe reduction in growth rate and assimilation efficiency but also in immune capacities. (C) 2004 Elsevier B.V. All rights reserved MH - Fr Polynesia MH - Mexico|Campeche MH - Mexico|Distrito Federal MH - Venezuela PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000221946500034 L2 - protein;production;oxygen consumption;assimilation;immune response;Litopenaeus vannamei;SHRIMP PENAEUS-CALIFORNIENSIS; HEMOLYMPH METABOLIC VARIABLES; SETIFERUS ADULT MALES; IMMUNE-RESPONSE; CLOTTING PROTEIN; HEAT INCREMENT; WHITE SHRIMP; PROPHENOLOXIDASE; CARBOHYDRATE; STYLIROSTRIS SO - Aquaculture 2004 ;236(1-4):431-450 11945 UI - 6362 AU - Pascual C AU - Arena L AU - Cuzon G AU - Gaxiola G AU - Taboada G AU - Valenzuela M AU - Rosas C AD - UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Campeche, MexicoCtr Oceanol Pacifique, Taravao, Tahiti, Fr PolynesiaRosas, C, UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Calle 26,1 Playa Norte Cd Carmen, Campeche, Mexico TI - Effect of a size-based selection program on blood metabolites and immune response of Litopenaeus vannamei juveniles fed different dietary carbohydrate levels AB - Blood metabolites in wild and seventh-generation cultivated shrimp were measured to determine how size-based selection could alter the nutritional and immunological conditions of Litopenaeus vannamei. Wild L. vannamei juveniles and a sample of seventh-generation cultured shrimp were acclimated under identical conditions. During 55 days, shrimp were fed a high (HCHO: 44%) or a low (LCHO: 3%) carbohydrate diet for 55 days. Wild shrimp showed a direct relation between dietary CHO and lactate, protein and hemocyte levels indicating that dietary CHO was used for protein synthesis via transamination pathways. In seventh-generation cultured shrimp these parameters were inversely proportional to dietary CHO level, indicating the capacity to synthesize protein from dietary CHO was repressed in cultured shrimp. Farmed shrimp showed a limited capacity to respond to LCHO diets demonstrating high protein dependence in their metabolism and immune response. These results demonstrate that during size-based breeding programs other metabolic process than CHO catabolism can be selected. The incapacity of shrimp to use dietary CHO could limit protein reduction of diets and limit the efforts of the shrimp industry to be ecologically and environmentally profitable. (C) 2004 Published by Elsevier B.V MH - Fr Polynesia MH - Mexico|Campeche PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000188602600032 L2 - blood metabolites;Litopenaeus vannamei;artificial selection;immune response;dietary carbohydrates levels;SHRIMP PENAEUS-CALIFORNIENSIS; SETIFERUS ADULT MALES; CLOTTING PROTEIN; WHITE SHRIMP; CRUSTACEANS; HEMOCYANIN; PROPHENOLOXIDASE; VARIABLES; PEPTIDES; SALINITY SO - Aquaculture 2004 ;230(1-4):405-416 11946 UI - 6918 AU - Pascual I AU - Gil-Parrado S AU - Cisneros M AU - Joseph-Bravo P AU - Diaz J AU - Possani LD AU - Charli JL AU - Chavez M AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet Desarrollo & Fisiol Mol, Cuernavaca 62271, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Med Mol & Bioproc, Cuernavaca 62271, Morelos, MexicoUniv La Habana, Fac Biol, Ctr Estudios Proteinas, Havana 10400, CubaCharli, JL, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet Desarrollo & Fisiol Mol, AP 510-3, Cuernavaca 62271, Morelos, Mexico TI - Purification of a specific inhibitor of pyroglutamyl aminopeptidase II from the marine annelide Hermodice carunculata - In vivo effects in rodent brain AB - An inhibitor of the metallo-ectoenzyme, pyroglutamyl aminopeptidase 11 (PPII), a thyrotropin releasing hormone-specific peptidase, was identified by screening extracts from marine species of the Cuban coast-line belonging to the phylla Chordata, Echinodermata, Annelida, Mollusca, Cnidaria, Porifera, Chlorophyta and Magnoliophyta. Isolation of the inhibitor (HcPI), from the marine annelide Hermodice carunculata, was achieved by trichloroacetic acid treatment of the aqueous extract, followed by ion-exchange chromatography on DEAE Sephacel, gel filtration on Sephadex G-25 and reverse phase-HPLC. HcPI had a small apparent molecular weight (below 1000 Da) and was not a peptide. It inhibited rat PPII (a membrane preparation with 8.5 mg protein/ml) with an apparent K-i of 51 nM. HcPI did not inhibit serine (trypsin, chymotrypsin, elastase and dipeptidyl aminopeptidase IV), cysteine (papain, bromelain and pyroglutamyl aminopeptidase 1), aspartic (pepsin and recombinant human immunodeficiency virus I protease (HIV 1-PR)) nor other metallo proteinases (collagenase, gelatinase, angiotensin converting enzyme, aminopeptidase N and carboxypeptidase A). HcPI was non-toxic and active in vivo. Intraperitoneal injection of HcPI reduced mouse pituitary and brain PPII activity. Potency of the effect was higher in hypophysis and hypothalamus than in other brain regions. Intrathecal administration to male rats reduced PPII activity in the spinal cord. In conclusion we have identified a specific inhibitor of PPII that is the first M I family zinc metallo-peptidase inhibitor isolated from marine invertebrates. It may be useful for elucidating the in vivo role of PPII in the pituitary and central nervous system. (C) 2003 Elsevier Ltd. All rights reserved MH - Cuba MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1357-2725 UR - ISI:000186571700013 L2 - TRH;metallo-peptidase;spinal cord;adenohypophysis;marine invertebrate;THYROTROPIN-RELEASING-HORMONE; GUINEA-PIG BRAIN; SEA-ANEMONE; RAT-BRAIN; DEGRADING ECTOENZYME; PROLYL ENDOPEPTIDASE; PROTEINASE-INHIBITOR; PEPTIDE-HYDROLASE; ACTINIA-EQUINA; ENZYME SO - International Journal of Biochemistry & Cell Biology 2004 ;36(1):138-152 11947 UI - 4510 AU - Pastor GM AU - Dorantes-Davila J AU - Bennemann KH AD - Univ Toulouse 3, CNRS, Phys Quant Lab, F-31062 Toulouse, FranceUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoFree Univ Berlin, Inst Theoret Phys, D-14195 Berlin, GermanyPastor, GM, Univ Toulouse 3, CNRS, Phys Quant Lab, 118 Route Narbonne, F-31062 Toulouse, France TI - Spin-fluctuation energies in transition-metal clusters AB - A functional-integral theory of itinerant magnetism is applied to 3d transition-metal clusters. The low temperature limit of the local spin-fluctuation energies DeltaF(l)(xi) at different atoms l is determined as a function of the exchange field xi by using a real-space recursive expansion of the local Green's functions. The size, structural, and local-environment dependence of DeltaF(l)(xi) is calculated for representative examples of Fe-N and Ni-N clusters with Nless than or equal to51 atoms. The interplay between fluctuations of the module and of the relative orientation of the local magnetic moments is analyzed. Module fluctuations generally dominate in the case of Ni-N, while Fe clusters show a stronger tendency to local moment reversals. A remarkable dependence of the spin-excitation spectrum on the local atomic environment and on interatomic bond-length relaxations is revealed. The transition from simple spin flips to module fluctuations of the local exchange fields is discussed as a function of cluster size MH - France MH - Germany MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000223716300057 L2 - RANGE MAGNETIC ORDER; ITINERANT-ELECTRON SYSTEMS; SMALL FE-N; NICKEL CLUSTERS; RESOLVED PHOTOEMISSION; IRON CLUSTERS; NARROW BANDS; FREE COBALT; TEMPERATURE; DEPENDENCE SO - Physical Review B 2004 ;70(6): 11948 UI - 3727 AU - Paternain GP AU - Petean J AD - Univ Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WB, EnglandCIMAT, Guanajuato 36000, MexicoPaternain, GP, Univ Cambridge, Dept Pure Math & Math Stat, Wilberforce Rd, Cambridge CB3 0WB, England TI - Entropy and collapsing of compact complex surfaces MH - United Kingdom MH - Mexico|Guanajuato PB - LONDON: LONDON MATH SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0024-6115 UR - ISI:000225501500008 L2 - FREE LOOP SPACE; TOPOLOGICAL-ENTROPY; ANALYTIC SURFACES; GEODESIC-FLOWS; RIEMANNIAN-MANIFOLDS; MINIMAL ENTROPY; NILMANIFOLDS; INVARIANT; HOMOLOGY SO - Proceedings of the London Mathematical Society 2004 ;89():763-786 11949 UI - 5344 AU - Patino-Iglesias ME AU - guilar-Armenta G AU - Jimenez-Lopez A AU - Rodriguez-Castellon E AD - Benemerita Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, Puebla, MexicoUniv Malaga, Fac Ciencias, Dept Quim Inorgan, Malaga 29071, SpainAguilar-Armenta, G, Benemerita Univ Autonoma Puebla, Fac Ciencias Quim, Ctr Invest, 14 Sur & Av San Claudio,Ciudad Univ, Puebla, Mexico TI - Kinetics of the total and reversible adsorption of propylene and propane on zeolite 4A (CECA) at different temperatures AB - The kinetics of adsorption of pure propylene (C3H6) and propane (C3H8) on a commercial zeolite sample 4A (CECA), provided by the company CECA, has been measured in the temperature range of 20-185degreesC using a high-vacuum volumetric glass device. For temperatures below the critical temperature of C3H6 (<92degreesC), especially at 20'C and with long contact times, a certain amount of irreversibly adsorbed C3H6 was observed, whereas for temperatures above the critical temperature the irreversibly adsorbed amount of propylene was extremely small. The isosteric heat of adsorption for C3H6 was also evaluated. Unlike the C3H6, the adsorbed amount of C3H8 on the 4A (CECA) sample at low and high temperatures was negligible and totally reversible. These results allow the assumption that this sample could be an excellent adsorbent for the molecular sieve separation of C3H6/C3H8 mixtures in the temperature range of 150-185 degreesC. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0927-7757 UR - ISI:000221876600008 L2 - zeolite 4A;propylene;propane;adsorption kinetics;isosteric heat of adsorption;SEPARATION; EQUILIBRIA; SORBENTS SO - Colloids and Surfaces A-Physicochemical and Engineering Aspects 2004 ;237(1-3):73-77 11950 UI - 5844 AU - Patrick BO AU - Reiff WM AU - Sanchez V AU - Storr A AU - Thompson RC AD - Northeastern Univ, Dept Chem, Boston, MA 02115, USAUniv British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, CanadaUniv Autonoma Estado Mexico, Fac Quim, Mexico City 50120, DF, MexicoReiff, WM, Northeastern Univ, Dept Chem, Boston, MA 02115, USA TI - Poly[(2,2 '-bipyridine)tetrakis(imidazolato)diiron(II)]: Structural and spin-state phase transitions and low-temperature magnetic ordering in a unique 2-dimensional material AB - Poly[(2,2'-bipyridine)tetrakis(imidazolato)diiron(II)] was synthesized by the reaction of ferrocene with imidazole in an excess of 2,2'- bipyridine in a Carius tube at 130degreesC. Dc magnetic susceptibility studies at an applied field of 1000 G reveal that on cooling from room temperature, the material undergoes two structural phase transitions designated alpha --> beta, and beta --> gamma at 151 and 133 K, respectively. On warming, the gamma --> beta and beta --> alpha transitions are observed at 137 and 151 K, respectively; a 4 K thermal hysteresis clearly detectable in the lower temperature beta <----> gamma transition. These structural phase transitions have also been studied by detailed, variable-temperature, ac susceptibility and Mossbauer spectroscopy techniques. Single-crystal X-ray diffraction studies done at 294, 143, and 113 K reveal 2, 12, and 6 unique iron centers in the alpha-, beta-, and gamma-forms, respectively. All three forms have the same basic structure involving 2D extended double layer sheets (bilayers) of alternating tetrahedral and octahedral irons singly bridged by imidazolate ligands, with the octahedral centers additionally coordinated by 2,2'-bipyridine ligands that occupy positions between the sheets. Magnetic susceptibility and bond length data reveal that in the gamma-phase one in three six-coordinate sites corresponds to spin singlet ground-state iron(II); i.e., the overall alpha --> gamma process involves a spin-crossover transition such that at least 1/6 of the iron sites in the gamma-phase correspond to S = 0. This is supported by the low-temperature Mossbauer spectra of the gamma-phase, which reveal the simultaneous presence of both S = 2 and S = 0 iron(II) centers. The compound magnetically orders, with a resultant small remnant magnetization, at low temperatures. The magnetic phase transition, studied by a combination of dc and ac susceptibility and Mossbauer techniques, occurs at T-c similar to 6.5 K MH - Canada MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000220583500020 L2 - CRYSTAL-STRUCTURE; ELECTRONIC-STRUCTURE; IRON(II); COMPLEXES; PYRAZOLATE; CROSSOVER; CHEMISTRY SO - Inorganic Chemistry 2004 ;43(7):2330-2339 11951 UI - 4514 AU - Patrykiejew A AU - Pizio O AU - Sokolowski S AD - Natl Autonomous Univ Mexico, Inst Quim, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Fac Chem, Dept Modelling Phys Chem Proc, PL-20031 Lublin, PolandPizio, O, Natl Autonomous Univ Mexico, Inst Quim, Circuito Exterior, Mexico City 04510, DF, Mexico TI - Demixing transitions in a binary Gaussian-core fluid confined in narrow slit-like pores AB - Using a mean-field density functional approach we investigate phase separation transition in a binary mixture of Gaussian-core molecules confined in narrow slit-like pores. We consider pores with repulsive and attractive walls. In the case of fluid confinement in pores with repulsive and non-selective attracting walls, no phase separation in the confined fluid, prior to the bulk separation transition, was observed. However, in the case of pores with the walls selectively attracting fluid particles, we reveal that the separation transition may take place as a two-step process. During the first step the composition change occurs within a few layers adjacent to the pore walls, whereas in the second step, it takes place in the pore interior MH - Mexico|Distrito Federal MH - Poland PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000223718800010 L2 - DENSITY-FUNCTIONAL THEORY; EFFECTIVE PAIR POTENTIALS; COLLOID-POLYMER MIXTURES; MONTE-CARLO SIMULATIONS; MODEL; MOLECULES; APPROXIMATION; EQUATION; SYSTEMS; CHAINS SO - Molecular Physics 2004 ;102(8):801-810 11952 UI - 4966 AU - Patrykiejew A AU - Pizio O AU - Sokolowski S AU - Sokolowska Z AD - Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Chem, Mexico City 04510, DF, MexicoPolish Acad Sci, Inst Agrophys, PL-20290 Lublin, PolandPatrykiejew, A, Marie Curie Sklodowska Univ, Dept Modelling Physicochem Proc, PL-20031 Lublin, Poland TI - Phase behavior of a binary symmetric mixture in slitlike pores with opposing walls: Application of density functional approach AB - We study adsorption of a symmetric binary Lennard-Jones mixture, which exhibits partial mixing in a bulk phase, in slitlike pores formed by the walls having antisymmetric properties with respect to the components. The calculations are carried out by means of a density functional approach. We show that under suitable conditions the pore filling may occur as a sequence of two first-order transitions. The capillary condensation may lead to an "antisymmetric" liquidlike film, the symmetry of which follows the symmetry of the adsorbing potential, or to a "demixed" film, the symmetry of which is only weakly associated with the symmetry of the adsorption potential. The additional first-order antisymmetric-demixed film transition begins at the triple point temperature and ends at the critical end point temperature MH - Mexico|Distrito Federal MH - Poland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000222502700053 L2 - DIFFERENTLY ADSORBING WALLS; LIQUID-LIQUID INTERFACE; GREEN-YVON EQUATION; CAPILLARY CONDENSATION; COMPETING WALLS; MONTE-CARLO; POLYMER BLENDS; FLUID MIXTURE; FINITE-SIZE; MODEL SO - Physical Review e 2004 ;69(6): 11953 UI - 4736 AU - Patterson R AU - Vega L AU - Trouba K AU - Bortner C AU - Germolec D AD - NIEHS, Mol Toxicol Lab, Res Triangle Pk, NC 27709, USACINVESTAV, Natl Polytech Inst, Mexico City 07360, DF, MexicoGermolec, D, NIEHS, Environm Immunol Lab, 111 TW Alexander Dr,POB 12233, Res Triangle Pk, NC 27709 USA TI - Arsenic-induced alterations in the contact hypersensitivity response in Balb/c mice AB - Previous studies in our laboratory indicate that arsenic alters secretion of growth promoting and inflammatory cytokines in the skin that can regulate the migration and maturation of Langerhans cells (LC) during allergic contact dermatitis. Therefore, we hypothesized that arsenic may modulate hypersensitivity responses to cutaneous sensitizing agents by altering cytokine production, LC migration, and T-cell proliferation. To investigate this hypothesis, we examined the induction and elicitation phases of dermal sensitization. Mice exposed to 50 mg/l arsenic in the drinking water for 4 weeks demonstrated a reduction in lymph node cell (LNC) proliferation and ear swelling following sensitization with 2,4-dinitrofluorobenzene (DNFB), compared to control mice. LC and T-cell populations in the draining lymph nodes of DNFB-sensitized mice were evaluated by fluorescence-activated cell sorting; activated LC were reduced in cervical lymph nodes, suggesting that LC migration may be altered following arsenic exposure. Lymphocytes from arsenic-treated animals sensitized with fluorescein isothiocyanate (FITC) exhibited reduced proliferative responses following T-cell mitogen stimulation in vitro; however, lymphocyte proliferation from nonsensitized, arsenic-treated mice was comparable to controls. Arsenic exposure also reduced the number of thioglycollate-induced peritoneal macrophages and circulating neutrophils. These studies demonstrate that repeated, prolonged exposure to nontoxic concentrations of sodium arsenite alters immune cell populations and results in functional changes in immune responses, specifically attenuation of contact hypersensitivity. (C) 2004 Published by Elsevier Inc MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-008X UR - ISI:000223146600022 L2 - arsenic;contact hypersensitivity;local lymph node assay;flow cytometry;NECROSIS-FACTOR-ALPHA; LYMPH-NODE ASSAY; ALVEOLAR MACROPHAGE FUNCTION; LANGERHANS CELL-MIGRATION; FEMALE B6C3F1 MICE; GALLIUM-ARSENIDE; ICCVAM EVALUATION; HUMAN KERATINOCYTES; MURINE MACROPHAGES; GROWTH-FACTORS SO - Toxicology and Applied Pharmacology 2004 ;198(3):434-443 11954 UI - 5539 AU - Paulson PD AU - Mathew X AD - Univ Delaware, Inst Energy Convers, Newark, DE 19711, USAUNAM, Ctr Invest Energia, Solar Hydrol Fuel Cell Grp, Temixco 62580, Morelos, MexicoPaulson, PD, Univ Delaware, Inst Energy Convers, Newark, DE 19711, USA TI - Spectroscopic ellipsometry investigation of optical and interface properties of CdTe films deposited on metal foils AB - Optical and interface properties of the CdTe films electrodeposited on Molybdenum and Stainless Steel substrates were investigated using variable angle spectroscopic ellipsometer measurement and multilayer optical analysis. The refractive index of CdTe film obtained from the multilayer optical modeling is found to be lower than single crystal data. The Bruggeman effective medium analysis shows that the films consist of nearly 11% void due to poor crystallinity resulting in the lower refractive index. The multilayer optical model also indicates the presence of a Te rich interface between CdTe and substrate, which can be associated to the kinetics of CdTe electrodeposition that starts from nucleating Te on substrate surface followed by the formation of CdTe. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000221289000027 L2 - CdTe;ellipsometry;electrodeposition;flexible substrate;THIN-FILMS; ELECTRODEPOSITED CDTE; SOLAR-CELLS SO - Solar Energy Materials and Solar Cells 2004 ;82(1-2):279-290 11955 UI - 4703 AU - Pavia EG AD - Ctr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoPavia, EG, CICESE, POB 434844, San Diego, CA 92143, USA TI - The uncertainty of climatological values AB - The uncertainty of climatological values is calculated with a method using the average absolute deviation from the mean, or absolute error. This method is related to the mean of the magnitude of the anomalies and its applicability is readily verified with a proposed approximate numerical technique, in contrast with the standard error method whose applicability is cumbersome to verify. Different data sets were tested with this technique showing that the method applies in a wide variety of geophysical cases, including non-Gaussian cases. When it applies, the absolute error method provides additional information on the mean, such as the error due to the sample size MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000223185300005 L2 - MEDITERRANEAN CALIFORNIA; TIME-SERIES; RAINFALL; CLIMATE SO - Geophysical Research Letters 2004 ;31(14): 11956 UI - 4667 AU - Paya J AU - Monzo J AU - Borrachero MV AU - Velazquez S AD - Univ Politecn Valencia, GIQUIMA, Dept Ingn Construcc & Proyectos Ingn Civil, E-46071 Valencia, SpainUniv Panamer Guadalajara, Zapopan, Jalisco, MexicoPaya, J, Univ Politecn Valencia, GIQUIMA, Dept Ingn Construcc & Proyectos Ingn Civil, Camino Vera S-N, E-46071 Valencia, Spain TI - Chemical activation of pozzolanic reaction of fluid catalytic cracking catalyst residue (FOR) in lime pastes: thermal analysis AB - In this paper the role and reactivity of fluid catalytic cracking catalyst residue (FC3R) as a pozzolanic mineral admixture are studied. For that purpose, thermogravimetric (TG) studies of several FC3R/lime pastes, activated by using different chemical compounds (NaOH, gypsum, CaCl2 and Na2SO4), were performed. First, lime fixation and the nature of the hydration products were characterised from TG curves. Second, sodium sulphate was considered as the best chemical activator in the lime fixation process, yielding a 100% of fixed lime for short curing periods. In addition, hydrated gehlenite crystals incorporating sulphate ions were identified, mainly in cured pastes. From these experimental studies, it can be concluded that FC3R is a very good pozzolanic material for inclusion in lime pastes and mortars, and the addition of a small amount of Na2SO4 and CaCl2 enhanced the reactive ability of FC3R with hydrated lime MH - Mexico|Jalisco MH - Spain PB - LONDON: THOMAS TELFORD SERVICES LTD RP - NOT IN FILE U3 - TC 3 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0951-7197 UR - ISI:000223323000005 L2 - THERMOGRAVIMETRIC ANALYSIS; WASTE CATALYST; METAKAOLIN; CONCRETE; FC3R; BED SO - Advances in Cement Research 2004 ;16(3):123-130 11957 UI - 6032 AU - Paz-Sandoval MA AU - Cervantes-Vasquez M AU - Young VG AU - Guzei IA AU - Angelici RJ AD - Ctr Invest & Estudios Avanzados, Dept Chem, Mexico City 07000, DF, MexicoUniv Minnesota, Dept Chem, Minneapolis, MN 55455, USAIowa State Univ, Ames Lab, Ames, IA 50011, USAIowa State Univ, Dept Chem, Ames, IA 50011, USAPaz-Sandoval, MA, Ctr Invest & Estudios Avanzados, Dept Chem, Ap Postal 14-740, Mexico City 07000, DF, Mexico TI - Elaborate network of hydrolysis and methanolysis reactions involving the 2,5-dimethylthiophene ligand in Cp*Ir(eta(5)-2,5-Me2T)(2+) AB - Reactions of aqueous base with the dicationic iridium and rhodium thiophene complexes [Cp*Ir(eta(5)-2,5-Me2T)] (X)(2) (X = BF4, 1 (BF4); X = OSO2CF3, 1 (OTf)) and [Cp*Rh(eta(5)-2,5-Me2T)] (BF4)(2) (8(BF4)) and the acid/base reactivity of these products are discussed. The reaction of 1(BF4) with 1 equiv of aqueous KOH (0.01 M) affords the following mixture of mono-, di-, and tetranuclear compounds: [Cp"Ir( eta(4)-SC(Me)CHCHC(0)Me)] (3), (Cp*Ir)[Cp*Ir(eta(4)-SC-(Me)CHCHC(O)Me)](3)(BF4)(2) (4(BF4)), [(Cp*Ir)(2)(mu(2),eta(4)-SC(Me)CHCC(O)Me)](BF4) (5(BF4)), and [Cp*Ir(mu(2),eta(3)-SC(Me)CHCH2C(O)Me)](2)(BF4)(2) (6(BF4)). The H-1 and C-13 NMR data are consistent with the single-crystal X-ray diffraction structures of the cationic complexes 4(BF4), 5(OTf), and 6(BF4). These products are formed by a complex series of reactions that begin with the displacement of the 2,5-dimethylthiophene (2,5-Me2T) ligand from 1 and reaction of the resulting "[Cp*Ir](2+)" fragment with 3. In the synthesis of 8(BF4), the new complex [(Cp*Rh)(2)(mu(2), eta(4)=SC(Me)CHCC(O)Me)](BF4) (9(BF4)), analogous to 5(BF4), is produced. Studies of the reactions of [Cp*Rh(eta(5)-2,5-Me2T)](BF4)(2) (8(BF4)) with OH- and MeO- show a type of reactivity quite different from that observed for 1(BF4) and I(OTf). The solvolysis of 8(BF4) in acetone affords the mononuclear complex [Cp*Rh(OCMe2)(2)(OH)](BF4) (10(BF4)), whose crystal structure is described. Detailed NMR studies establish the pathways by which [Cp*Ir(eta(5)-2,5-Me2T)](2+) (1) and [Cp*Rh(eta(5)-2,5-Me2T)](2+) (8) react with H2O/OH- and MeOH/MeO- to give the variety of observed products MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0276-7333 UR - ISI:000220093200019 L2 - BASE HYDROLYSIS; COORDINATED THIOPHENE; X-RAY; COMPLEXES; REACTIVITY; SULFUR; (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)RHODIUM; CHEMISTRY; CLEAVAGE SO - Organometallics 2004 ;23(6):1274-1283 11958 UI - 4716 AU - Paz MF AU - Yaya-Tur R AU - Rojas-Marcos I AU - Reynes G AU - Pollan M AU - guirre-Cruz L AU - Garcia-Lopez JL AU - Piquer J AU - Safont MJ AU - Balana C AU - Sanchez-Cespedes M AU - Garcia-Villanueva M AU - Arribas L AU - Esteller M AD - Spanish Natl Canc Ctr, CNIO, Canc Epigenet Lab, Madrid 28029, SpainInst Valenciano Oncol, Dept Med Oncol, Valencia, SpainInst Valenciano Oncol, Dept Radiotherapy, Valencia, SpainHop La Pitie Salpetriere, Dept Neurol, INSERM, U495, Paris, FranceHosp Univ La Fe, Dept Med Oncol, Valencia, SpainSpanish Natl Ctr Epidemiol, Carlos III Inst Hlth, Canc Epidemiol Unit, Madrid, SpainNatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoHosp Ramon y Cajal, Dept Med Oncol, E-28034 Madrid, SpainHosp Ramon y Cajal, Dept Pathol, E-28034 Madrid, SpainHosp Ribera, Dept Neurosurg, Alzira, SpainHosp Ribera, Dept Med Oncol, Alzira, SpainHosp Germans Trias & Pujol, Dept Med Oncol, Badalona, Catalonia, SpainSpanish Natl Canc Ctr, CNIO, Mol Pathol Program, Madrid 28029, SpainEsteller, M, Spanish Natl Canc Ctr, CNIO, Canc Epigenet Lab, 3rd Floor,Melchor Fernandez Almagro 3, Madrid 28029, Spain TI - CpG island hypermethylation of the DNA repair enzyme methyltransferase predicts response to temozolomide in primary gliomas AB - Purpose: The DNA repair enzyme O-6-methylguanine DNA methyltransferase (MGMT) inhibits the killing of tumor cells by alkylating agents, and its loss in cancer cells is associated with hypermethylation of the MGMT CpG island. Thus, methylation of MGMT has been correlated with the clinical response to 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) in primary gliomas. Here, we investigate whether the presence of MGMT methylation in gliomas is also a good predictor of response to another emergent alkylating agent, temozolomide. Experimental Design: Using a methylation-specific PCR approach, we assessed the methylation status of the CpG island of MGMT in 92 glioma patients who received temozolomide as first-line chemotherapy or as treatment for relapses. Results: Methylation of the MGMT promoter positively correlated with the clinical response in the glioma patients receiving temozolomide as first-line chemotherapy (n = 40). Eight of 12 patients with MGMT-methylated tumors (66.7%) had a partial or complete response, compared with 7 of 28 patients with unmethylated tumors (25.0%; P = 0.030). We also found a positive association between MGMT methylation and clinical response in those patients receiving BCNU (n = 35, P = 0.041) or procarbazine/1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea (n = 17, P = 0.043) as first-line chemotherapy. Overall, if we analyze the clinical response of all of the first-line chemotherapy treatments with temozolomide, BCNU, and procarbazine/1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea as a group in relation to the MGMT methylation status, MGMT hypermethylation was strongly associated with the presence of partial or complete clinical response (P < 0.001). Finally, the MGMT methylation status determined in the initial glioma tumor did not correlate with the clinical response to temozolomide when this drug was administered as treatment for relapses (P = 0.729). Conclusions: MGMT methylation predicts the clinical response of primary gliomas to first-line chemotherapy with the alkylating agent temozolomide. These results may open up possibilities for more customized treatments of human brain tumors MH - France MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 55 U4 - Oncology U5 - J;Article AV - English IS - 1078-0432 UR - ISI:000223257200005 L2 - GENE O-6-METHYLGUANINE-DNA METHYLTRANSFERASE; PHASE-II TRIAL; PROMOTER HYPERMETHYLATION; O-6-ALKYLGUANINE-DNA ALKYLTRANSFERASE; TUMOR XENOGRAFTS; GLIOBLASTOMA-MULTIFORME; INDUCED TOXICITY; METHYLATION; INACTIVATION; CANCER SO - Clinical Cancer Research 2004 ;10(15):4933-4938 11959 UI - 5380 AU - Peasey AE AU - Ruiz-Palacios GM AU - Quigley M AU - Newsholme W AU - Martinez J AU - Rosales G AU - Jiang X AU - Blumenthal UJ AD - London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1, EnglandNatl Inst Med Sci & Nutr, Dept Infect Dis, Tlalpan, MexicoCincinnati Childrens Hosp, Div Infect Dis, Med Ctr, Cincinnati, OH, USAPeasey, AE, Univ Coll London, Dept Epidemiol & Publ Hlth, 1-19 Torrington Pl, London WC1E 6BT, England TI - Seroepidemiology and risk factors for sporadic norovirus/Mexico strain AB - Risk factors associated with transmission of sporadic norovirus (NV; formerly Norwalk-like virus)/Mexico strain were identified in a seroepidemiological study conducted in rural Mexico. Acquisition of Mexico strain IgA antibodies was age-related; 34% of 1-4-year-olds were seropositive, compared with 81% of adults (P < .001). After 12 months, 42% of 1-4-year-olds showed a seroresponse to Mexico strain, compared with 27% of adults (P < .01). Personal and domestic hygiene measures, such as hand washing, general cleanliness of the mother's clothing, and the type of room assigned for cooking were significantly associated with odds of a seroresponse. For infants, having a dog in or near the home was a risk factor for seroresponse (P < .01), whereas, for older children, the mother's involvement in agricultural activities was a risk factor (P < .001). This study provides initial evidence of risk factors associated with sporadic NV infection. Data indicate some similarities to risk factors associated with outbreaks of NV infection MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 3 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000221653500010 L2 - NORWALK-LIKE VIRUSES; ROUND-STRUCTURED VIRUS; HUMAN CALICIVIRUSES; ENVIRONMENTAL CONTAMINATION; MOLECULAR EPIDEMIOLOGY; VIRAL GASTROENTERITIS; ENZYME IMMUNOASSAYS; HOSPITAL OUTBREAK; MEXICAN CHILDREN; YOUNG-CHILDREN SO - Journal of Infectious Diseases 2004 ;189(11):2027-2036 11960 UI - 3680 AU - Pecchi G AU - Reyes P AU - Lopez T AU - Gomez R AD - Concepcion Univ, Fac Ciencias Quim, Dept Fis Quim, Concepcion, ChileUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoPecchi, G, Concepcion Univ, Fac Ciencias Quim, Dept Fis Quim, Casilla 3-C, Concepcion, Chile TI - Pd-CeO2 and Pd-La2O3/alumina-supported catalysts: their effect on the catalytic combustion of methane AB - A series of palladium-promoter alumina-supported catalysts prepared by the sol-gel method are characterized and their catalytic results in the combustion of methane are reported. It was found that the cerium addition to alumina modifies the surface properties and produces an enhancement in the dispersion of palladium catalysts when compared with its lanthanum. counterpart. The Pd-CeO2/Al2O3 catalysts display higher specific reaction rate and turnover frequency compared to the lanthanum promoted series attributed to both, the higher dispersion and the presence of oxygen-donor species. (C) 2004 Published by Elsevier B.V MH - Chile MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000225583200119 L2 - BEHAVIOR; CERIA; CO SO - Journal of Non-Crystalline Solids 2004 ;345-46():624-627 11961 UI - 5199 AU - Pech A AU - Tsvankin I AD - Inst Politecn Nacl, CIIDIR, Unidad Oaxaca, Xoxocotlan, Oaxaca, MexicoColorado Sch Mines, Dept Geophys, Ctr Wave Phenomena, Golden, CO 80401, USAPech, A, Inst Politecn Nacl, CIIDIR, Unidad Oaxaca, Calle Hornos 1003, Xoxocotlan, Oaxaca, Mexico TI - Quartic moveout coefficient for a dipping azimuthally anisotropic layer AB - Interpretation and inversion of azimuthally varying nonhyperbolic reflection moveout requires accounting for both velocity anisotropy and subsurface structure. Here, our previously derived exact expression for the quartic moveout coefficient A(4) is applied to P-wave reflections from a dipping interface overlaid by a medium of orthorhombic symmetry. The weak-anisotropy approximaton for the coefficient A(4) in a homogeneous orthorhombic layer is controlled by the anellipticity parameters eta((1)), eta((2)), and eta((3)), which are responsible for time processing of P-wave data. If the dip plane of the reflector coincides with the vertical symmetry plane [x(1), x(3)], A(4) on the dip line is proportional to the in-plane anellipticity parameter eta((2)) and always changes sign for a dip of 30degrees. The quartic coefficient on the strike line is a function of all three eta-parameters, but for mild dips it is mostly governed by eta((1))-the parameter defined in the incidence plane [x(2), x(3)]. Whereas the magnitude of the dip line A(4) typically becomes small for dips exceeding 45degrees, the nonhyperbolic moveout on the strike line may remain significant even for subvertical reflectors. The character of the azimuthal variation of A(4) depends on reflector dip and is quite sensitive to the signs and relative magnitudes of n((1)), eta((2)), and eta((3)). The analytic results and numerical modeling show that the azimuthal pattern of the quartic coefficient can contain multiple lobes, with one or two azimuths of vanishing A(4) between the dip and strike directions. The strong influence of the anellipticity parameters on the azimuthally varying coefficient A(4) suggests that nonhyperbolic moveout recorded in wide-azimuth surveys can help to constrain the anisotropic velocity field. Since for typical orthorhombic models that describe naturally fractured reservoirs the parameters eta((1,2,3)) are closely related to the fracture density and infill, the results of azimuthal nonhyperbolic moveout analysis can also be used in reservoir characterization MH - Mexico|Oaxaca MH - USA PB - TULSA: SOC EXPLORATION GEOPHYSICISTS RP - NOT IN FILE U3 - TC 6 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0016-8033 UR - ISI:000222196300006 L2 - NONHYPERBOLIC REFLECTION MOVEOUT; TRANSVERSELY ISOTROPIC MEDIA; ORTHORHOMBIC MEDIA; VELOCITY ANALYSIS; PARAMETERS; INVERSION SO - Geophysics 2004 ;69(3):699-707 11962 UI - 6212 AU - Pech D AU - Condal AR AU - Bourget E AU - Ardisson PL AD - Univ Laval, Dept Biol, Quebec City, PQ G1K 7P4, CanadaUniv Laval, Dept Sci Geomat, Quebec City, PQ G1K 7P4, CanadaUniv Sherbrooke, Sherbrooke, PQ J1K 2R1, CanadaIPN, CINVESTAV, Unidad Merida, Dept Recursos Mar, Merida 97310, Yucatan, MexicoPech, D, Univ Laval, Dept Biol, Quebec City, PQ G1K 7P4, Canada TI - Abundance estimation of rocky shore invertebrates at small spatial scale by high-resolution digital photography and digital image analysis AB - We have tested both the usefulness of high-resolution digital photography for data acquisition and digital image analysis, by non-supervised classification and high pass filter, for recognition and abundance estimation of benthic intertidal organisms. These digital tools were compared with visual scan and photo quadrat conventional methods. The comparison was done using 40 quadrats (10 x 5 cm) randomly selected along a 5-m transect on the rocky shore of the Pemaquid Point, Maine, USA. ANOVA for repeated measures was used to test differences among methods. Monte Carlo simulation analysis was used to explore differences among methods over a large set of data (n = 100, 500, 1000 quadrats). Differences among methods were observed when 40 quadrats were used. Tukey multiple comparison test showed that abundance estimation from visual scan, photo quadrat and digital image analysis by high pass filter do not differ significantly among them but differ from non-supervised classification results. Due to its accurate estimation, high pass filter (Prewitt) method was chosen as the most reliable digital method to estimate species abundance. Monte Carlo simulation of visual scan, photo quadrat and high pass filter results showed significant differences when the number of quadrats was larger. These results showed that the combined use of digital photography and digital image analysis techniques for the acquisition and analysis of recorded data is a powerful method for the study of intertidal benthic organisms. Results produced using these techniques were similar than those produced by conventional methods but were obtained in a much-reduced time. (C) 2003 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-0981 UR - ISI:000188948700003 L2 - benthos;digital photography;digital image analysis;small spatial scale;AERIAL-PHOTOGRAPHY; PATTERN; COVER; COMMUNITIES; ECOLOGY; POINT SO - Journal of Experimental Marine Biology and Ecology 2004 ;299(2):185-199 11963 UI - 6513 AU - Pedra J AU - Sainz L AU - Corcoles F AU - Lopez R AU - Salichs M AD - UPC, ETSEIB, Dept Elect Engn, Barcelona 08028, SpainInst Invest Elect, Morelos 62490, MexicoPedra, J, UPC, ETSEIB, Dept Elect Engn, Barcelona 08028, Spain TI - PSPICE computer model of a nonlinear three-phase three-legged transformer AB - This paper proposes a simple, practical PSPICE model of a three-phase, three-legged, saturated transformer with accurate performance. The transformer is modeled with its electric and magnetic equivalent circuits and a simple but reliable characterization of its nonlinear magnetic behavior. Two three-phase transformers of 380/220 V, 7.5 kVA, and 60 kVA, respectively, are studied in order to verify the goodness of the model. The parameters of these transformers are measured in the laboratory, and comparison of the PSPICE model with real measurements has been successful MH - Mexico|Morelos MH - Spain PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000187886300030 L2 - magnetizing current;nonlinear model;saturation curve;transformer model;TRANSIENT; SIMULATION SO - Ieee Transactions on Power Delivery 2004 ;19(1):200-207 11964 UI - 4390 AU - Pedraza-Reyes M AU - Yasbin RE AD - Univ Guanajuato, Fac Chem, Inst Invest Expt Biol, Guanajuato, MexicoUniv Texas, Dept Mol & Cell Biol, Richardson, TX, USAYasbin, RE, Univ Nevada, Coll Sci, 4505 Maryland Pkwy,Box 454001, Las Vegas, NV 87154 USA TI - Contribution of the mismatch DNA repair system to the generation of stationary-phase-induced mutants of Bacillus subtilis AB - A reversion assay system previously implemented to demonstrate the existence of adaptive or stationary-phase-induced mutagenesis in Bacillus subtilis was utilized in this report to study the influence of the mismatch DNA repair (MMR) system on this type of mutagenesis. Results revealed that a strain deficient in MutSL showed a significant propensity to generate increased numbers of stationary-phase-induced revertants. These results suggest that absence or depression of MMR is an important factor in the mutagenesis of nongrowing B. subtilis cells because of the role of MMR in repairing DNA damage. In agreement with this suggestion, a significant decrease in the number of adaptive revertant colonies, for the three markers tested, occurred in B. subtilis cells which overexpressed a component of the MMR system. Interestingly, the single overexpression of mutS, but not of mutL, was sufficient to decrease the level of adaptive mutants in the reversion assay system of B. subtilis. The results presented in this work, as well as in our previous studies, appear to suggest that an MMR deficiency, putatively attributable to inactivation or saturation with DNA damage of MutS, may occur in a subset of B. subtilis cells that differentiate into the hypermutable state MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000223988700017 L2 - ADAPTIVE MUTATION; ESCHERICHIA-COLI; SOS RESPONSE; MUTAGENESIS; EVOLUTION; IDENTIFICATION; RECOMBINATION; STRATEGIES; RESISTANCE; DELETIONS SO - Journal of Bacteriology 2004 ;186(19):6485-6491 11965 UI - 3970 AU - Pedro H AU - Tetaert D AU - Vergoten G AU - Debray H AU - del Carmen Jimenez M AU - Alvarez G AU - Agundis C AU - Degand P AU - Zenteno E AD - UNAM, Fac Med, Lab Inmunol, Dept Bioquim, Mexico City 04510, DF, MexicoInst Nacl Enfermedades Resp, Dept Bioquim, Tlalpan 14080, DF, MexicoUniv Autonoma Estado Oaxaca, Ctr Invest Med Biol, Fac Med, Oaxaca 68020, MexicoINSERM, U 560, F-59045 Lille, FranceUniv Sci & Technol Lille, UMR 8576, F-59655 Villeneuve Dascq, FranceUNAM, Fac Med, Dept Bioquim, Lab Inmunol, Mexico City 04510, DF, MexicoZenteno, E, UNAM, Fac Med, Lab Inmunol, Dept Bioquim, POB 70159, Mexico City 04510, DF, Mexico TI - Specificity of Amaranthus leucocarpus syn. hypocondriacus lectin for O-glycopeptides AB - Amaranthus leucocarpus syn. hypochondriacus lectin (ALL) has been shown to be specific for N-acetyl-D-galactosamine (GaINAc). In this work, we determined a value of 1.0x10(-2) M for the association constant of ALL for GaINAc, calculated using fluorescence spectroscopy assays. Using neoglycopeptides obtained by in vitro O-glycosylation, we determined the main features of O-glycopeptides recognized by ALL using molecular dynamics simulations, capillary electrophoresis, and ELISA. Neo-glycopeptides were obtained by in vitro 0-glycosylation reaction using microsornal preparations of murine thymocytes, human gastric fundus and colonic mucosa. ELISA assays were performed with peroxidase-labeled murine monoclonal IgG2, kappa light chain (5134) antibodies against ALL. Among the in vitro neoglycopeptides, only those of TTSAPTTS containing GaNAc at Thr in #2 and #6 reacted with ALL. Neither the TTSAPTTS glycopeptide, containing a unique GaINAc residue at Thr in #2, nor others (with more than two GaINAc residues) interacted with the lectin. Computational docking assays of the lower energy conformers for interactions between glycopeptides and lectins confirmed that ALL recognized GaNAc residues when they are spaced out in glycan structures, whereas GaINAc residues arranged in clusters prevented interaction with the lectin, indicating that ALL is specific for a special GaINAc-containing motif found in different O-glycoproteins. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Oaxaca PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0304-4165 UR - ISI:000224938600007 L2 - Amaranthus leucocarpus;plant lectin;T- and Tn-specific lectin;O-glycan;MUCIN MOTIF PEPTIDES; MASS-SPECTROMETRY; CARBOHYDRATE-RECOGNITION; LIQUID-CHROMATOGRAPHY; SUBMAXILLARY MUCIN; ALZHEIMER-DISEASE; PLANT-LECTINS; PURIFICATION; GLYCOSYLATION; ANTIGEN SO - Biochimica et Biophysica Acta-General Subjects 2004 ;1674(3):282-290 11966 UI - 4935 AU - Pedroza-Gonzalez A AU - Garcia-Romo GS AU - guilar-Leon D AU - Calderon-Amador J AU - Hurtado-Ortiz R AU - Orozco-Estevez H AU - Lambrecht BN AU - Estrada-Garcia I AU - Hernandez-Pando R AU - Flores-Romo L AD - IPN, CINVESTAV, Ctr Adv Res, Dept Expt Pathol, Mexico City 07360, DF, MexicoNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Expt Pathol, Mexico City, DF, MexicoErasmus Univ, Dept Pulm Med, Rotterdam, NetherlandsIPN, Natl Sch Biol Sci, Dept Immunol, Mexico City 07738, DF, MexicoFlores-Romo, L, IPN, CINVESTAV, Ctr Adv Res, Dept Expt Pathol, Ave IPN 2508, Mexico City 07360, DF, Mexico TI - In situ analysis of lung antigen-presenting cells during murine pulmonary infection with virulent Mycobacterium tuberculosis AB - Scarce information exists about the role of lung antigen-presenting cells (APCs) in vivo during pulmonary tuberculosis. As APCs activate cellular immunity, following intratracheal inoculation with virulent Mycobacterium tuberculosis, we assessed in situ lung APC recruitment, distribution, granuloma involvement, morphology and mycobacterial burden by using MHC-CII, CD14, scavenger receptor class A (SRA), the murine dendritic cell (DC)-restricted marker CD11c and Ziehl-Neelsen staining. CD11c(+) DC and CD14(+) cell recruitment into lungs appeared by day 14, continuing until day 60. MHC-CII+ cells increased since day 7, persisting until day 60. Thus, virulent mycobacteria delays (14-21 days) lung APC recruitment compared to model antigens and nonvirulent bacilli (24-48 h). Regarding granuloma constitution, highly bacillary CD14(+) and SRA(+) cells were centrally located. MHC-CII+ cells were more peripheral, with less mycobacteria. CD11c(+) cells were heterogeneously distributed within granulomas, with scarce bacilli. When labelling lung suspensions for MHC-CII and classifying cells as macrophages or DC, then staining for Ziehl-Neelsen, a remarkable segregation was found regarding bacillary burden. Most macrophage-like cells contained numerous bacilli, while DC had no or scarce mycobacteria. This implies differential APC contributions in situ during pulmonary tuberculosis regarding mycobacterial uptake, granuloma involvement and perhaps bacillary growth MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Pathology U5 - J;Article AV - English IS - 0959-9673 UR - ISI:000222718800003 L2 - APC;DCs and macrophages;lung;Mycobacterium tuberculosis;pulmonary tuberculosis;DENDRITIC CELLS; IMMUNE-RESPONSE; T-CELLS; MACROPHAGES; PATHOGENESIS; LOCALIZATION; POPULATIONS; PERSISTENCE; KINETICS; TISSUE SO - International Journal of Experimental Pathology 2004 ;85(3):135-145 11967 UI - 5531 AU - Pedroza-Islas R AU - Gallardo P AU - Vernon-Carter EJ AU - Garcia-Galano T AU - Rosas C AU - Pascual C AU - Gaxiola G AD - Univ Iberoamer, Dept Ingn, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Fac Ciencias, Grp Biol Marina Expt, Sede Cd Carmen, Campeche, MexicoUniv Autonoma Metropolitana Iztapalapa, DIPH, Mexico City 09340, DF, MexicoUniv La Habana, Ctr Invest Marinas, Havana, CubaGaxiola, G, Apdo Postal 69 Cd Carmen, Campeche, Mexico TI - Growth, survival, quality and digestive enzyme activities of larval shrimp fed microencapsulated, mixed and live diets AB - An artificial diet for shrimp larvae was microencapsulated with a polysaccharide blend [66% gum arabic, 17% mesquite gum and 17% maltodextrin 10 dextrose equivalent (DE)]. Microencapsulated diet (MD) was fed to mysis alone, as a co-feed with the microalgae Chaetoceros cerastosporum and Tetraselmis chuii (mixed) and compared with a live diet (control) of C. cerastosporum, T. chuii and Artemia nauplii. No significant differences (P > 0.05) were detected in growth rates, development and quality indexes of larvae fed the three experimental diets. All diets supported survival percentages of >90%. Shrimp larvae fed MD and mixed diets had higher specific trypsin activity and soluble protein content than those fed live diet. Amylase activity decreased in larvae fed the mixed and MD apparently due to the carbohydrate composition of the diet. The results indicate that it is possible to substitute a live diet with a microencapsulated one (with a wall composition made up of a polysaccharide blend) in Litopenaeus vannamei mysis MH - Cuba MH - Mexico|Campeche MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 1353-5773 UR - ISI:000221488500003 L2 - bioassay;biopolymers;live diet;microencapsulated diets;shrimp larvae;PENAEUS-JAPONICUS; FEEDSTUFF MICROENCAPSULATION; BIOPOLYMER BLENDS; CRUSTACEAN LARVAE; POSTLARVAE; DECAPODA; PROTEIN; REPLACEMENT; PENAEIDAE; SIZE SO - Aquaculture Nutrition 2004 ;10(3):167-173 11968 UI - 6354 AU - Peimbert M AU - Peimbert A AU - Ruiz MT AU - Esteban C AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Chile, Dept Astron, Santiago, ChileInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainPeimbert, M, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Physical conditions of the planetary nebula NGC 5315 derived from VLT echelle observations and the t(2) problem AB - Echelle spectrophotometry of the planetary nebula NGC 5315 is presented. The data consist of VLT UVES observations in the 3100-10450 Angstrom range. The intensities of 556 emission lines have been measured, including 508 identified permitted lines of H-0, He-0, C-0, C+, N-0, N+, N++, O-0, O+, Ne-0, Ne+, Mg+, Si+, S-0, S+, S++, and Ar+. Electron temperatures and densities have been determined using many different line intensity ratios. The He+, C++, N++, O++, and Ne++ ionic abundances have been derived from recombination lines; these abundances are almost independent of the temperature structure of the nebula. Alternatively, abundances from collisionally excited lines have been derived for a large number of ions of different elements; these abundances depend strongly on the temperature structure. Accurate t(2) values have been derived from the He I lines, and by comparing the O++ ionic abundances obtained from collisionally excited and recombination lines. The similarity between the widths and radial velocities of the O II and the [O III] lines rules out the presence of chemical abundance inhomogeneities in this object. The chemical composition of NGC 5315 is compared with those of the Orion nebula and the Sun MH - Chile MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 28 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000188656800004 L2 - ISM : abundances;nuclear reactions, nucleosynthesis, abundances planetary nebulae : individual (NGC 5315);PRIMORDIAL HELIUM ABUNDANCE; OPTICAL RECOMBINATION LINES; H-II REGIONS; CHEMICAL-COMPOSITION; TEMPERATURE-FLUCTUATIONS; ORION-NEBULA; ELECTRON-TEMPERATURE; EMISSION-LINES; GASEOUS NEBULAE; HII-REGIONS SO - Astrophysical Journal Supplement Series 2004 ;150(2):431-454 11969 UI - 3929 AU - Pelaiz-Barranco A AU - Gonzalez-Carmenate I AU - Calderon-Pinar F AU - Torres-Garcia E AD - Univ La Habana, Fac Fis, Inst Mat & React, Havana 10400, CubaInst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, MexicoUniv La Habana, Fac Quim, Inst Mat & React, Havana 10400, CubaPelaiz-Barranco, A, Univ La Habana, Fac Fis, Inst Mat & React, San Lazaro & L Vedado, Havana 10400, Cuba TI - AC behavior and PTCR effect in PZN-PT-BT ferroelectric ceramics AB - The ac behavior of the PZN-PT-BT ceramic system was studied in wide temperature and frequency ranges. Two contributions in the impedance plane were obtained: grain and grain-boundary responses. A positive temperature coefficient of resistivity (PTCR) was observed in the temperature dependence of the ceramic resistivity, dominated by the grain response. The results are explained on the basis of the Heywang and Jonker models. The Schottky barrier formed at grain boundary regions acts as traps of the electrons available from the oxygen vacancies in the ceramic, whose concentration decreases with temperature by an oxidation process when the temperature rises in air conditions, increasing the Schottky barrier height of the samples. This provides PTCR characteristics from the transition temperature to about 220degreesC. (C) 2004 Published by Elsevier Ltd MH - Cuba MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0038-1098 UR - ISI:000224867300002 L2 - ferroelectrics;grain boundaries;dielectric response;POSITIVE-TEMPERATURE-COEFFICIENT; MORPHOTROPIC PHASE-BOUNDARY; DOPED BATIO3 CERAMICS; BARIUM-TITANATE; DIELECTRIC-PROPERTIES; SPECTROSCOPY; RESISTANCE; IMPEDANCE; SYSTEM; RESISTIVITY SO - Solid State Communications 2004 ;132(7):431-435 11970 UI - 4997 AU - Pellegrineschi A AU - Reynolds M AU - Pacheco M AU - Brito RM AU - Almeraya R AU - Yamaguchi-Shinozaki K AU - Hoisington D AD - CIMMYT, Appl Biotechnol Ctr, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoUniv Adelaide, CRC Mol Plant Breeding, Glen Osmond, SA 5064, AustraliaCIMMYT, Wheat Program, Mexico City 06600, DF, MexicoMinist Agr Forestry & Fisheries, Biol Resources Div, JIRCAS, Tsukuba, Ibaraki 3058686, JapanPellegrineschi, A, CIMMYT, Appl Biotechnol Ctr, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Stress-induced expression in wheat of the Arabidopsis thaliana DREB1A gene delays water stress symptoms under greenhouse conditions AB - One of the major environmental factors limiting plant productivity is lack of water. This is especially true for the major cereals maize, rice, and wheat, which demonstrate a range of susceptibility to moisture deficit. Although conventional breeding and marker-assisted selection are being used to develop varieties more tolerant to water stress, these methods are time and resource consuming and germplasm dependent. Genetic engineering is attractive because of its potential to improve abiotic stress tolerance more rapidly. Transcription factors have been shown to produce multiple phenotypic alterations, many of which are involved in stress responses. DREB1A, a transcription factor that recognizes dehydration response elements, has been shown in Arabidopsis thaliana to play a crucial role in promoting the expression of drought-tolerance genes. In our efforts to enhance drought tolerance in wheat, the A. thaliana DREB1A gene was placed under control of a stress-inducible promoter from the rd29A gene and transferred via biolistic transformation into bread wheat. Plants expressing the DREB1A gene demonstrated substantial resistance to water stress in comparison with checks under experimental greenhouse conditions, manifested by a 10-day delay in wilting when water was withheld MH - Australia MH - Japan MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 33 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000222350000008 L2 - wheat transformation;MPB Bobwhite 26;DREB1A;rd29 promoter;moisture stress tolerance;ABSCISIC-ACID; LOW-TEMPERATURE; TRANSCRIPTION FACTORS; TRANSGENIC PLANTS; DROUGHT; COLD; PROMOTER; BIOSYNTHESIS; DEHYDRATION; TOLERANCE SO - Genome 2004 ;47(3):493-500 11971 UI - 3921 AU - Pena-Gomar MC AU - Gonzalez-Gonzdlez ML AU - Garcia-Valenzuela A AU - nto-Roca J AU - Perez E AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicados & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, CD6, E-08222 Terrassa, SpainPena-Gomar, MC, Univ Autonoma San Luis Potosi, Inst Fis, Alvaro Obregon 64, San Luis Potosi, Mexico TI - Monitoring particle adsorption by use of laser reflectornetry near the critical angle AB - We investigate the use of laser reflectometry near the critical angle to monitor particle adsorption onto a flat glass surface. Experimental results show that positive particles are adsorbed onto the glass surface and that their adsorption kinetics depend strongly on the volume fraction occupied by the particles in suspension but not appreciably on the particle size. The reflectance near the critical angle is dominated by the particles on the surface, with the contribution of the particles in suspension being very low. We compare the reflectance change near the critical angle with the change in reflectance near the Brewster angle when particles are adsorbed onto the glass surface. We find that reflectometry near the critical angle is 3000 times more sensitive than it is near the Brewster angle. Some optical images are presented to validate our results. (C) 2004 Optical Society of America MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000225144000007 L2 - RANDOM SEQUENTIAL ADSORPTION; REFRACTIVE-INDEX; SURFACES; KINETICS SO - Applied Optics 2004 ;43(32):5963-5970 11972 UI - 5179 AU - Pena-Lecona FG AU - Mosino JF AU - Filippov VN AU - Martinez-Celorio RA AU - Barbosa-Garcia OC AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Southampton, Southampton SO17 1BJ, Hants, EnglandUniv Guanajuato, Fac Ingn Mecan Elect & Electron, Salamanca 36730, Gto, MexicoPena-Lecona, FG, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - An electro-optic fibre sensor with double pass configuration for measuring high ac voltage AB - A new fibre optic sensor suitable for high voltage measurements is introduced. The sensor is based on a double pass configuration of light through a Bi12TiO20 (BTO) photorefractive crystal. To obtain the double pass configuration, a back-reflecting prism with high stability to temperature variations is incorporated in the sensor head. The prism enhances the performance of the sensor allowing the BTO to work in a wide linear region of its transfer function. To prove the feasibility of our fibre optic sensor, one ac periodic wave and transient event of high voltage were measured and reported. The sensor is proved to be robust, linear, and shows high resolution in the detection of voltage impulses MH - United Kingdom MH - Mexico|Guanajuato PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Instruments & Instrumentation U5 - J;Article AV - English IS - 0957-0233 UR - ISI:000222201300013 L2 - fibre optic sensor;Pockels effect;voltage sensor;sensitivity;CRYSTAL SO - Measurement Science & Technology 2004 ;15(6):1129-1132 11973 UI - 4069 AU - Pena-Ramos EA AU - Xiong YLL AU - Arteaga GE AD - Univ Kentucky, Dept Anim Sci, Food Sci Sect, Lexington, KY 40546, USACtr Invest Alimentac & Desarrollo AC, Anim Derived Food Dept, Hermosillo 83000, Sonora, MexicoMASECA, Monterrey 64710, Nuevo Leon, MexicoXiong, YLL, Univ Kentucky, Dept Anim Sci, Food Sci Sect, Lexington, KY 40546 USA TI - Fractionation and characterisation for antioxidant activity of hydrolysed whey protein AB - Whey protein isolate (WPI) was hydrolysed for 1h using Alcalase, Protamex and Flavourzyme. Native WPI, hydrolysed WPI and two commercial WPI hydrolysates were subjected to fractionation by size exclusion chromatography. Antioxidant activity of WPI fractions was measured with a liposome-oxidising system (50 mum FeCl3/0.1 mum ascorbate, pH 7.0). Lipid oxidation was measured as thiobarbituric acid-reactive substances (TBARS). Gel electrophoresis and amino acid analysis were run to identify the peptide composition. The influence of amino acid composition on antioxidant activity was evaluated using multivariate analysis methods (correlation analysis, principal component analysis, multiple linear regression and discriminant analysis). TBARS assays indicated the presence of antioxidant activity in all protein fractions, including non-hydrolysed WPI. For native and hydrolysed WPI samples the first fraction (>45kDa) showed a higher TBARS inhibition effect (24-27%) when compared with lower-molecular-weight fractions and hydrolysate mixtures. In contrast, for commercial WPI hydrolysates a higher inhibitory effect was found in most of the lower-molecular-weight fractions (30-55%). The ability of WPI fractions to delay lipid oxidation was found to be related to the prevalence of histidine and hydrophobic amino acids. (C) 2004 Society of Chemical Industry MH - USA MH - Mexico|Nuevo Leon MH - Mexico|Sonora PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 11 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000224590600015 L2 - whey protein isolate;hydrolysed proteins;peptides;antioxidants;lipid oxidation;multivariate analysis;AMINO-ACIDS; MULTIVARIATE-ANALYSIS; LIPOSOMAL SYSTEM; SOYBEAN PROTEIN; PEPTIDES; IDENTIFICATION; SULFHYDRYLS; DERIVATIVES; DIPEPTIDES; LINOLEATE SO - Journal of the Science of Food and Agriculture 2004 ;84(14):1908-1918 11974 UI - 4588 AU - Pena F AU - Ramirez JM AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Farmacobiol, Mexico City 14330, DF, MexicoUniv Chicago, Dept Organismal Biol & Anat, Chicago, IL 60637, USAPena, F, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Farmacobiol, Calzada Tenorios 235,Colonia Granjas Coapa, Mexico City 14330, DF, Mexico TI - Substance P-mediated modulation of pacemaker properties in the mammalian respiratory network AB - Neuromodulators are integral parts of a neuronal network, and unraveling how these substances alter neuronal activity is critical for understanding how networks generate patterned activity and, ultimately, behavior. In this study, we examined the cellular mechanisms underlying the excitatory action of substance P (SP) on the respiratory network isolated in spontaneously active transverse slice preparation of mice. SP produced a slow depolarization in all recorded inspiratory pacemaker and non-pacemaker neurons. Ion exchange experiments and blockers for different ion channels suggest that the slow depolarization is caused by the activation of a low-threshold TTX-insensitive cationic current that carries mostly Na+. The SP-induced slow depolarization increased tonic discharge in non-pacemaker neurons and primarily enhanced the frequency of bursting in Cd2+-insensitive pacemaker neurons. In the Cd2+-sensitive pacemaker neuron, the burst frequency was not significantly affected, whereas burst duration and amplitude were more enhanced than in Cd2+-insensitive pacemaker neurons. In a subset of non-pacemaker neurons that produced NMDA-dependent subthreshold oscillations, SP caused the production of bursts of action potentials. We conclude that the degree of pacemaker activity in the respiratory network is not fixed but dynamically regulated by neuromodulators such as SP. This finding may have clinical implications for Rett syndrome in which SP levels along with other neuromodulators are decreased in the brainstem MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 31 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000223521200015 L2 - respiratory network;pacemaker neurons;TTX-resistant Na+ current;substance P;neuromodulation;bursting properties;MOTOR PATTERN GENERATION; LOCUS-CERULEUS NEURONS; BRAIN-STEM SLICES; RETT-SYNDROME; IN-VITRO; SYMPATHETIC NEURONS; INWARD CURRENT; SENSORY NEURONS; VENTROLATERAL MEDULLA; PREBOTZINGER COMPLEX SO - Journal of Neuroscience 2004 ;24(34):7549-7556 11975 UI - 4971 AU - Pena F AU - Parkis MA AU - Tryba AK AU - Ramirez JM AD - Univ Chicago, Dept Organismal Biol & Anat, Chicago, IL 60637, USAIPN, Dept Farmacobiol, Ctr Invest & Estudios Avanzados, Mexico City 14330, DF, MexicoPena, F, Univ Chicago, Dept Organismal Biol & Anat, Chicago, IL 60637 USA TI - Differential contribution of pacemaker properties to the generation of respiratory rhythms during normoxia and hypoxia AB - Pacemaker neurons have been described in most neural networks. However, whether such neurons are essential for generating an activity pattern in a given preparation remains mostly unknown. Here, we show that in the mammalian respiratory network two types of pacemaker neurons exist. Differential blockade of these neurons indicates that their relative contribution to respiratory rhythm generation changes during the transition from normoxia to hypoxia. During hypoxia, blockade of neurons with sodium-dependent bursting properties abolishes respiratory rhythm generation, while in normoxia respiratory rhythm generation only ceases upon pharmacological blockade of neurons with heterogeneous bursting properties. We propose that respiratory rhythm generation in normoxia depends on a heterogeneous population of pacemaker neurons, while during hypoxia the respiratory rhythm is driven by only one type of pacemaker MH - Mexico|Distrito Federal MH - USA PB - CAMBRIDGE: CELL PRESS RP - NOT IN FILE U3 - TC 56 U4 - Neurosciences U5 - J;Article AV - English IS - 0896-6273 UR - ISI:000222549800011 L2 - PERSISTENT SODIUM CURRENT; CENTRAL PATTERN GENERATORS; PRE-BOTZINGER COMPLEX; RAT CORTICAL-NEURONS; IN-VITRO; PLATEAU POTENTIALS; NERVOUS-SYSTEM; SPINAL-CORD; NETWORK; RILUZOLE SO - Neuron 2004 ;43(1):105-117 11976 UI - 5299 AU - Pena M AU - Hamann WR AU - Ruiz MT AU - Peimbert A AU - Peimbert M AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Potsdam, Lehrstuhl Astrophys, D-14469 Potsdam, GermanyUniv Chile, Dept Astron, Santiago, ChilePena, M, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - A high resolution spectroscopic study of the extraordinary planetary nebula LMC-N66 AB - The planetary nebula N66 in the Large Magellanic Cloud is an extraordinary object, as it is the only confirmed PN where the central star is a Wolf-Rayet star of the nitrogen sequence, i.e. of type [WN]. Moreover, the star showed a dramatic brightness outburst in 1993-1994. In a previous paper (Hamann et al. 2003) we analyzed the changing stellar spectra and found evidence that the central star is most likely a binary system where a white dwarf presently accretes matter from a non-degenerate companion at a high rate. Thus the object is a candidate for a future type Ia supernova in our cosmic neighborhood. In the present paper we analyze the morphology and kinematics of the nebula, using images and high-resolution spectra obtained with the Hubble Space Telescope (HST) and the Very Large Telescope (ESO-VLT). The object presents a complex multipolar structure, dominated by very bright lobes located at both sides of the central star and separated by a narrow waist. In addition there is a pair of very extended and twisted loops, also pointing in opposite directions; their symmetry axis and collimation angle differs from those of the bright lobes. High resolution spectroscopy reveals two main velocity components, "approaching" material at an average heliocentric radial velocity Of V-rad = 248 30 km s(-1) and similarly bright "receding" material at V-rad = 331 +/- 25 km s(-1). A systemic velocity of about 300 km s(-1) is derived. Opposite lobes and loops possess opposite velocities. Furthermore there are knots and filaments of complex structure and kinematics. Close to the central star, nebular gas is found, receding at very high velocity (125 km s(-1) relative to the system). The morphology and kinematics of LMC-N66 can be explained as the result of episodic bipolar ejections with changing axis. The bipolar structures could have been produced by collimated streams ejected from a precessing central source. We suggest that the precession could have been produced by an external torque, possibly due to a binary companion. Young, fast-moving nebular knots close to the star appear slightly He- and N-richer than the main body of the nebula, but are still hydrogen-rich in contrast to the helium-dominated atmosphere of the [WN]-type central star. In the binary scenario, this nebular matter must have been accreted from the non-degenerate companion and re-ejected before it was fully burnt MH - Chile MH - Germany MH - Mexico|Distrito Federal PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000221886800021 L2 - ISM : jets and outflows;ISM : kinematics and dynamics;galaxies : Magellanic Clouds;ISM : planetary nebulae : individual : LMC-N66;stars : mass-loss;stars : Wolf-Rayet;HUBBLE-SPACE-TELESCOPE; LARGE-MAGELLANIC-CLOUD; CENTRAL STAR; KINEMATICS; MORPHOLOGY; BIPOLAR; N66 SO - Astronomy & Astrophysics 2004 ;419(2):583-592 11977 UI - 4631 AU - Penaloza-Vazquez A AU - Fakhr MK AU - Bailey AM AU - Bender CL AD - Oklahoma State Univ, Dept Entomol & Plant Pathol, Stillwater, OK 74078, USAOklahoma State Univ, Dept Microbiol & Mol Genet, Stillwater, OK 74078, USAIPN, CINVESTAV, Unidad Irapuato, Dept Ingn Genet Plantas, Guanajuato 36500, MexicoBender, CL, Oklahoma State Univ, Dept Entomol & Plant Pathol, Stillwater, OK 74078 USA TI - AlgR functions in algC expression and virulence in Pseudomonas syringae pv. syringae AB - Pseudomonas syringae pv. syringae strain FF5 is a phytopathogen associated with a rapid dieback on ornamental pear trees. P. syringae and the human pathogen Pseudomonas aeruginosa produce the exopolysaccharide alginate, a copolymer of mannuronic and guluronic acid. In P. aeruginosa, the response regulator AlgR (AlgR1) is required for transcription of algC and algD, which encode key enzymes in the alginate biosynthetic pathway. In P. syringae FF5, however, algR is not required for the activation of algD. Interestingly, algR mutants of P. syringae remain nonmucoid, indicating an undefined role for this response regulator in alginate biosynthesis. In the current study, the algC promoter region was cloned from P. syringae pv. syringae strain FF5, and sequence analysis of the algC promoter indicated the presence of potential binding 54 sites for AlgR and a, the alternative sigma factor encoded by rpoN. The algC promoter from P. syringae FF5 (PsalgC) was cloned upstream of a promoterless glucuronidase gene (uidA), and the PsalgC-uidA transcriptional fusion was used to monitor algC expression in strains FF5.32 (algR mutant of P. syringae FF5) and PG4180.K2 (rpoN mutant of P. syringae pv. glycinea PG4180). Expression of the PsalgC-uidA fusion was fourfold lower in both the algR and rpoN mutants as compared to respective wild-type strains, indicating that both AlgR and a 54 are required for full activation of algC transcription in P. syringae pv. syringae. AlgR from P. syringae was successfully overproduced in Escherichia coli as a C-terminal translational fusion to the maltose-binding protein (MBP). Gel shift experiments indicated that MBP-AlgR binds strongly to the algC promoter region. Biological assays demonstrated that the algR mutant was significantly impaired in both pathogenicity and epiphytic fitness as compared to the wild-type strain. These results, along with the gene expression studies, indicate that AlgR has a positive role in the activation of algC in P. syringae and contributes to both virulence and epiphytic fitness. Furthermore, the symptoms observed with wild-type P. syringae FF5 suggest that this strain can move systemically in leaf tissue, and that a functional copy of algR is required for systemic movement MH - Mexico|Guanajuato MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Microbiology U5 - J;Article AV - English IS - 1350-0872 UR - ISI:000223365600026 L2 - BIOSYNTHETIC GENE-CLUSTER; ALGINATE SYNTHESIS; PHYTOTOXIN CORONATINE; ENVIRONMENTAL-STRESS; TWITCHING MOTILITY; SYSTEMIC INVASION; CYSTIC-FIBROSIS; REGULATOR ALGR; TOMATO DC3000; AERUGINOSA SO - Microbiology-Sgm 2004 ;150():2727-2737 11978 UI - 5731 AU - Peng C AU - Meng H AU - Song S AU - Lu S AU - Lopez-Valdivieso A AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R ChinaSong, S, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Secondary potential in electrodialysis membranes and the effect on permselectivity AB - The most important factor in the electrodialysis (ED) process is the permselectivity of the ion exchange membranes, which permit not only the separation of cations and anions in a solution, but also the separation of ions with the same sign but different valences. In this work, the mechanism of the permselectivity has been studied through the measurement of the potentials at different planes of the membrane. The experimental results have shown that there was a secondary potential inside ion exchange membranes in an electrodialysis process. At the membrane side touched with dilute solution, this secondary potential enhanced the external electrical field, and thus speeded up the passage of the corresponding ions in the dilute solution through the membranes; at the membrane side touched with concentrated solution, the secondary potential was contrary to the external electrical field and thus counteracted it, which could be very helpful by preventing the ions in the concentrated solution from entering the membranes. Obviously, the existence of the secondary potential might play an important role in the permselectivity of ion exchange membranes in ED processes. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|San Luis Potosi MH - Peoples R China PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000220807800032 L2 - ion exchange membrane;permselectivity;secondary potential;electrodialysis SO - Journal of Colloid and Interface Science 2004 ;273(1):256-261 11979 UI - 5221 AU - Peng CS AU - Meng H AU - Song SX AU - Lu S AU - Lopez-Valdivieso A AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R ChinaSong, SX, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Elimination of Cr(VI) from electroplating wastewater by electrodialysis following chemical precipitation AB - In this work, the elimination of Cr(VI) from an electroplating wastewater in China was studied by chemical precipitation (CP), electrodialysis (ED), and their combination. The experimental results show that CP was effective as a rougher treatment for removing Cr(VI) from a high Cr(VI) wastewater, but not for a deep Cr(VI) elimination. ED alone failed to achieve a deep Cr(VI) elimination from a high Cr(VI) wastewater, although it was very effective for a medium Cr(VI) wastewater. The mechanism might be attributed to the sedimentation of chromatic as polychromates in the pores of ED membranes because of high Cr(VI) concentration in wastewater, which may block the pores and thus stop the transportation of the ions through the pores. It was found that the combined chemical precipitation and electrodialysis (CP + ED) process is an effective and economic process to treat high Cr(VI) electroplating wastewater. This process allows treated water to be completely recycled to electroplating lines, fewer environmental concerns, and lower reagent and operation costs MH - Mexico|San Luis Potosi MH - Peoples R China PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0149-6395 UR - ISI:000221958000004 L2 - electrodialysis;chemical precipitation;chromium ions;electroplating wastewater;AZOLLA-FILICULOIDES; RECOVERY; REMOVAL SO - Separation Science and Technology 2004 ;39(7):1501-1517 11980 UI - 4940 AU - Peniche C AU - Howland I AU - Carrillo O AU - Zaldivar C AU - rguelles-Monal W AD - CIAD, Unidad Guaymas, Guaymas 85480, Sonora, MexicoUniv Havana, Ctr Biomat, Havana 10400, CubaCtr Invest Med Quirurg, CIMEQ, Havana, CubaUniv Havana, Fac Biol, Havana 10400, CubaArguelles-Monal, W, CIAD, Unidad Guaymas, Carretera Varadero Nacl Km 6-6,Apdo Postal 284, Guaymas 85480, Sonora, Mexico TI - Formation and stability of shark liver oil loaded chitosan/calcium alginate capsules AB - Calcium alginate capsules containing shark liver oil were prepared by ionotropic gelation of alginate solutions. Since the capsules were permeable to the oil, they were coated with it membrane of chitosan-alginate polyelectrolyte complex to reduce permeability. Encapsulation efficiencies (expressed as the percentage of shark liver oil entrapped) greater than 87% (w/w) were obtained by using 6% (w/v) alginate solution. ne oil content in the capsules was higher than 65% (w/w) when the oil was dispersed in the alginate solution at 10% (v/v) or more. However, at the level of 15 or 20% (v/v) the oil was exuded after 48 h. Capsules were degraded in vitro by enzymes, with lipase being more effective than pancreatine. No release of oil from the capsules up to 4 h at pH 1.2 was observed, but after 4 h the capsules became very fragile when they were immersed in buffer solution at pH 7.4. (C) 2004 Elsevier Ltd. All rights reserved MH - Cuba MH - Mexico|Sonora PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000222666200016 L2 - encapsulation;shark liver oil;chitosan;alginate;POLYCATION MICROCAPSULES; MICROSPHERES SO - Food Hydrocolloids 2004 ;18(5):865-871 11981 UI - 4164 AU - Peralta RD AU - Infante R AU - Cortez G AU - Elizalde LE AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Boul Ing Reyna Hermosillo 140, Saltillo 25000, Coahuila, Mexico TI - Density, excess volumes and partial volumes of the systems of p-xylene plus ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of p-xylene with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are positive for the binaries of p-xylene with methyl methacrylate and styrene and negative for the binary with butyl methacrylate. The excess volumes for the system p-xylene + ethyl acrylate are positive for p-xylene concentrations less than 0.7 mole fraction and negative afterwards. The values of the excess volume for the systems of p-xylene with ethyl acrylate and styrene are small enough to assume that they behave ideally. (C) 2004 Elsevier B.V. All rights reserved MH - Israel MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical;Chemistry, Physical U5 - J;Article AV - English IS - 0040-6031 UR - ISI:000224372100009 L2 - acrylates;densities;excess volumes;monomers;p-xylene;styrene;POLYNOMIAL SERIES; MOLAR VOLUMES; POWER-SERIES; MIXTURES; ETHYLBENZENE; BEHAVIOR; TOLUENE; ESTERS SO - Thermochimica Acta 2004 ;421(1-2):59-68 11982 UI - 4812 AU - Peralta RD AU - Infante R AU - Cortez G AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Density, excess volumes, and partial volumes of the binary systems of dimethyl sulfoxide plus ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of dimethyl sulfoxide with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition at 298.15 K and atmospheric pressure using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for the four binaries, probably as a result of the large dipolemoment of DMSO, becoming smaller as the monomer becomes more branched or longer, and the dipole moment per monomer unit becomes larger MH - Israel MH - Mexico|Coahuila PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0095-9782 UR - ISI:000222986100003 L2 - acrylates;densities;dimethyl sulfoxide;excess volumes;POLYNOMIAL SERIES; POWER-SERIES SO - Journal of Solution Chemistry 2004 ;33(4):337-349 11983 UI - 4858 AU - Peralta RD AU - Infante R AU - Cortez G AU - Wisniak J AD - Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, MexicoBen Gurion Univ Negev, Dept Chem Engn, IL-84105 Beer Sheva, IsraelPeralta, RD, Ctr Invest Quim Aplicada, Saltillo 25000, Coahuila, Mexico TI - Volumetric properties of ethyl ethanoate with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene at 298.15 K AB - Densities of the binary systems of ethyl ethanoate with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition, at 298.15 K and atmospheric pressure, using an Anton Paar DMA 5000 oscillating U-tube densitometer. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for systems ethyl ethanoate +(ethyl acrylate, methyl methacrylate, and styrene) and positive for the system with butyl acrylate MH - Israel MH - Mexico|Coahuila PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-9104 UR - ISI:000222750800007 L2 - acrylates;ethyl ethanoate;excess volumes;styrene;POLYNOMIAL SERIES; POWER-SERIES SO - Physics and Chemistry of Liquids 2004 ;42(4):391-401 11984 UI - 4027 AU - Percino MJ AU - Chapela VM AU - Ortega-Martinez R AD - Univ Autonoma Puebla, Ctr Quim, Inst Ciencias, Complejo Ciencias,ICUAP, Puebla 72570, MexicoUniv Nacl Autonoma Mexico, Lab Opt Aplicada, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 14020, DF, MexicoPercino, MJ, 1215 San Dario Ave,Suite 48-126, Laredo, TX 78040, USA TI - Synthesis, characterization and evaluation of nonlinear optical properties of chiral hydrobenzoin monomers AB - Four new monomers have been synthesized by condensation of the chiral pure reagents (R,R)-(+)-1,2-diphenyl-1,2-ethanediol and (SS)-(-)-1,2-diphenyl-1,2-ethanediol ((R,R)-(+)-hydrobenzoin and (SS)-(-)-hydrobenzoin, respectively) with methacryloyl chloride with the purpose of preparing structures that exhibit second harmonic generation of laser light and to polymerize them by free radical polymerization. The monomers (R,R)-(+)-1,2-diphenyl(2-methacryloyloxy)ethanol, (S,S)-(-)-1,2-diphenyl(2-methacryloyloxy)ethanol, (R,R)-(+)-1,2-diphenyl(1,2-dimethacryloyloxy)-ethane and (SS)-(-)-1,2-diphenyl(1,2-dimethacryloyloxy)-ethane were obtained and characterized by melting point measurements, infrared spectroscopy, nuclear magnetic resonance spectroscopy, gas chromatography with mass spectroscopy and polarimetry. The optical properties evaluation was made following the Kurtz and Perry modified procedure in powder form and using a Nd:YAG laser as pulse light source (approximate to0.466 mJ/mm(2)) at 1064 urn. The second harmonic generated light (532 nm) from each compound was compared with the calibration spectrum of a chiral compound (saccharose or sucrose, know as sugar) used as a standard. The second harmonic generation values measured showed that R,R(+)-1,2-diphenyl(2-methacryloyloxy)ethanol and (SS)-(-)-1,2-diphenyl(2-methacryloyloxy)ethanol enantiomers had better efficiency of second harmonic generation than (R,R)-(+)-1,2-diphenyl(l,2-dimethacryloyloxy)ethane and (SS)-(-)-1,2-diphenyl(1,2-dimethacryloyloxy)ethane under the same conditions. In other words, the monoacylation products worked much better than the diacylation products or the hydrobenzoin enantiomers themselves from the SHG behavior point of view. Keywords: (R,R)-(+)-Hydrobenzoin; (SS)-(-)-hydrobenzoin; (R,R)-(+)-1,2-diphenyl(2-methacryloyloxy)ethanol; (SS)-(-)-1,2-diphenyl(2-methacryloyloxy)-ethanol; (R,R)-(+)-1,2-diphenyl(l,2-dimethacryloyloxy)ethane; (SS)-(-)-1,2-diphenyl(1,2-dimethacryloyloxy)ethane; chiral monomers; second harmonic generation; nonlinear optical properties MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 1385-772X UR - ISI:000224799200003 L2 - THIN-FILMS; ASYMMETRIC POLYMERIZATION; 2ND-HARMONIC GENERATION; POLYMERS; POLYESTERS; MOIETIES SO - Designed Monomers and Polymers 2004 ;7(5):435-444 11985 UI - 4879 AU - Pereira MG AU - Jimenez MD AU - Elizalde MP AU - Manzo-Robledo A AU - onso-Vante N AD - Univ Poitiers, CNRS, Lab Electrocatal, UMR 6503, F-86022 Poitiers, FranceUniv Autonoma Puebla, Fac Ciencias Quim, Puebla 72571, Pue, MexicoUniv Autonoma Puebla, Ctr Quim, Puebla 72571, Pue, MexicoAlonso-Vante, N, Univ Poitiers, CNRS, Lab Electrocatal, UMR 6503, 40 Ave Recteur Pineau, F-86022 Poitiers, France TI - Study of the electrooxidation of ethanol on hydrophobic electrodes by DEMS and HPLC AB - The electrochemical oxidation of ethanol in alkaline solution has been studied on Cu-PVC electrode and Ni/Cu-PVC composite electrodes modified by ruthenium nanoparticles. The techniques used were cyclic voltammetry (CV), steady-state potentiostatic method, on line differential electrochemical mass spectrometry (DEMS), and high-performance liquid chromatography (HPLC). The chemical products: acetaldehyde and acetic acid were detected measuring the proper mass charge (m/z) ratios. These products were also confirmed by HPLC. The surface modification of composite electrodes by ruthenium nanoparticles promotes the formation of acetaldehyde. As shown by DEMS, the surface modification shifts the onset potential for oxygen evolution reaction on the Cu-PVC composite electrode towards more anodic values. (C) 2004 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Puebla PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000222818100033 L2 - Cu-PVC composite electrodes;DEMS;HPLC;ethanol oxidation;electrolysis;Ru nanoparticles;ELECTROCHEMICAL MASS-SPECTROMETRY; OXIDE COATED ELECTRODES; ALKALINE-SOLUTIONS; COPPER ELECTRODES; AQUEOUS BASE; OXIDATION; NICKEL; ALCOHOLS; PLATINUM; KINETICS SO - Electrochimica Acta 2004 ;49(22-23):3917-3925 11986 UI - 3739 AU - Pereyra RT AU - Saillant E AU - Pruett CL AU - Rexroad CE AU - Rocha-Olivares A AU - Gold AR AD - CICESE, Dept Oceanog Biol, Ensenada 22860, Baja California, MexicoTexas A&M Univ, Ctr Biosystemat & Biodivers, College Stn, TX 77843, USAUSDA ARS, Natl Ctr Cold & Cool Water Aquaculture, Kearneysville, WV 25430, USARocha-Olivares, A, CICESE, Dept Oceanog Biol, Carr Tijuana Ensenada Km 107, Ensenada 22860, Baja California, Mexico TI - Characterization of polymorphic microsatellites in the Pacific sardine Sardinops sagax sagax (Clupeidae) AB - We isolated 11 microsatellites from the Pacific sardine Sardinops sagax sagax. The number of alleles and H-E among 30 individuals from a single population ranged from four to 24 and from 0.606 to 0.959, respectively. Pacific sardines are a vital economic resource in the northeastern Pacific Ocean, but insufficiently polymorphic loci have limited inferences about its stock structure and genetic variation. The level of variability of these new markers will prove useful in testing hypotheses on the stock-structure and long-term genetic integrity of the species MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000225496600065 L2 - genomic library;marine fish;microsatellites;Pacific sardine;PCR primers;VARIABILITY SO - Molecular Ecology Notes 2004 ;4(4):739-741 11987 UI - 5336 AU - Perez-Cornejo P AU - de Santiago JA AU - Arreola J AD - Univ Autonoma San Luis Potosi, Sch Med, San Luis Potosi 78290, MexicoUniv Autonoma San Luis Potosi, Inst Phys, San Luis Potosi 78290, MexicoUniv Rochester, Med Ctr, Ctr Oral Biol, Rochester, NY 14642, USAArreola, J, Univ Autonoma San Luis Potosi, Sch Med, San Luis Potosi 78290, Mexico TI - Permeant anions control gating of calcium-dependent chloride channels AB - The effects of external anions (SCN-, NO3-, I-, Br-, F-, glutamate, and aspartate) on gating of Ca2+-dependent Cl- channels from rat parotid acinar cells were studied using the whole-cell configuration of the patch-clamp technique. Shifts in the reversal potential of the current induced by replacement of external Cl- with foreign anions, gave the following selectivity sequence based on permeability ratios (P-x/P-Cl): SCN- > I- > NO3- > Br- > Cl- > F- > aspartate > glutamate. Using a continuum electrostatic model we calculated that this lyotropic sequence resulted from the interaction between anions and a polarizable tunnel with an effective dielectric constant of similar to23. Our data revealed that anions with P-x/P-Cl > 1 accelerated activation kinetics in a voltage-independent manner and slowed deactivation kinetics. Moreover, permeant anions enhanced whole-cell conductance (g, an index of the apparent open probability) in a voltage-dependent manner, and shifted leftward the membrane potential-g curves. All of these effects were produced by the anions with an effectiveness that followed the selectivity sequence. To explain the effects of permeant anions on activation kinetics and g(Cl) we propose that there are 2 different anion-binding sites in the channel. One site is located outside the electrical field and controls channel activation kinetics, while a second site is located within the pore and controls whole-cell conductance. Thus, interactions of permeant anions with these two sites hinder the closing mechanism and stabilize the channel in the open state MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Cell Biology;Physiology U5 - J;Article AV - English IS - 0022-2631 UR - ISI:000221798700002 L2 - Ca2+-dependent Cl- channels;gating;anion selectivity;acinar cells;permeation;PAROTID ACINAR-CELLS; TRANSMEMBRANE CONDUCTANCE REGULATOR; SKELETAL-MUSCLE; CL CONDUCTANCES; SECRETORY-CELLS; MODULATION; ACTIVATION; MEMBRANE; VOLUME; MECHANISM SO - Journal of Membrane Biology 2004 ;198(3):125-133 11988 UI - 5439 AU - Perez-Cornejo P AU - Arreola J AU - Law FY AU - Schultz JB AU - Knauf PA AD - Univ Rochester, Dept Biochem & Biophys, Sch Med, Rochester, NY 14642, USAUniv Rochester, Ctr Oral Biol, Aab Inst Biomed Sci, Rochester, NY 14642, USAUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoKnauf, PA, Univ Rochester, Dept Biochem & Biophys, Sch Med, 601 Elmwood Ave,Box 712, Rochester, NY 14642 USA TI - Volume-sensitive chloride channels do not mediate activation-induced chloride efflux in human neutrophils AB - Many agents that activate neutrophils, enabling them to adhere to venular walls at sites of inflammation, cause a rapid Cl- efflux. This Cl- efflux and the increase in the number and affinity of 132 integrin surface adhesion molecules (up-regulation) are all inhibited by ethacrynic acid and certain aminomethyl phenols. The effectiveness of the latter compounds correlates with their inhibition of swelling-activated Cl- channels (I-Clvol), suggesting that I-Clvol mediates the activator-induced Cl- efflux. To test this hypothesis, we used whole-cell patch clamp in hypotonic media to examine the effects of inhibitors of up-regulation on I-Clvol in neutrophils and promyclocytic leukemic HL-60 cells. Both the channel blocker 5-nitro-2-(3-phenylpropylamino)benzoic acid and [3-methyl-1-p-sulfophenyl-5-pyrazolone-(4)]-[1,3-dibutylbarbituric acid]-pentamethine oxonol (WW781), a nonpenetrating oxonol, inhibited I-Clvol at concentrations similar to those that inhibit beta(2) integrin up-regulation. However, ethacrynic acid, at the same concentration that inhibits activator-induced Cl- efflux and up-regulation, had no effect on I-Clvol and swelling-activated Cl- efflux, providing evidence against the involvement of I-Clvol in the activator-induced Cl- efflux MH - Mexico|San Luis Potosi MH - USA PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 4 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000221579600058 L2 - RESPIRATORY BURST; MAMMALIAN-CELLS; PROTEIN-KINASE; HL-60 CELLS; ION EFFLUX; CL EFFLUX; EXPRESSION; ADHERENCE; ANION; ENDOTHELIUM SO - Journal of Immunology 2004 ;172(11):6988-6993 11989 UI - 4424 AU - Perez-Escamilla R AU - Guerrero ML AD - Univ Connecticut, Dept Nutrit Sci, Storrs, CT 06269, USA. Natl Inst Med Sci & Nutr, Dept Infect Dis, Mexico City, DF, Mexico TI - Epidemiology of breastfeeding - Advances and multidisciplinary applications AB - Advancing understanding of the importance of breastfeeding (BF) has required advances in application of epidemiologic methods to BF research. This chapter considers, in the context of BF epidemiology, how different research designs complement each other to establish firmer causal inferences, the need for multidisciplinary collaborations, and the application of powerful analytical methods to strengthen epidemiologic studies. A recent global meta-analysis of 47 studies documenting the inverse association between lifetime BF duration and breast cancer risk illustrates the value of longitudinal (cohort) studies to establish the temporal sequence of events and to rule out differential recall biases that can threaten the internal validity of case-control studies. The discovery of the transmission of human immunodeficiency virus (HIV) via human milk has led epidemiologists to provide important hypotheses to be tested at the molecular and cellular level and in turn test hypotheses generated in laboratory studies. Application of powerful statistical methods to BF epidemiology has helped strengthen causal inferences. A retrospective analysis of the 1976-1977 Malaysian Family Life Survey found interactive multivariate statistical models to better understand how different socioeconomic and cultural contexts modify the influence of BF on child health. Further, a study conducted in Cebu City, Philippines, demonstrated how structural equation models can be used to test the pathways through which proximate (e.g., BF) and distal (e.g., socioeconomic status) determinants affect child health after adjusting for reverse causality (i.e., child health influencing maternal BF choice). For ethical reasons, BF randomized controlled trials (RCTs) have seldom been conducted. Recent RCTs examining the link between BF peer counseling and BF outcomes in diverse settings provides a unique opportunity to firmly establish the causal inferences regarding BF and the prevention of diarrheal diseases. The value of rapid assessment anthropologic methods to guide development of peer counseling interventions subsequently tested through RCTs is presented. This chapter also illustrates how Cox regression and logistic regression can be applied to BF research MH - Mexico|Distrito Federal MH - USA T3 - PROTECTING INFANTS THROUGH HUMAN MILKAdvances in experimental medicine and biology PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Medicine, Research & Experimental U5 - S;Article NT - SEnglishArticlerperez@canr.uconn.edu mlga@quetzal.innsz.mx4233 SPRING ST, NEW YORK, NY 10013 USAADVAN EXPERIMENT MED BIOLBAU75 AV - English IS - 0065-2598 UR - ISI:000223641000003 SO - 2004 ;():45-59 11990 UI - 4085 AU - Perez-Gavilan JJ AU - Aliabadi MH AD - Univ London Queen Mary Coll, Dept Engn, London E1 4NS, EnglandUniv Nacl Autonoma Mexico, Inst Ingn, Coyoacan 04510, DF, MexicoAliabadi, MH, Univ London Queen Mary Coll, Dept Engn, Mile End Rd, London E1 4NS, England TI - A Galerkin formulation for shear deformable plate bending dynamics AB - A Galerkin boundary element formulation for shear deformable plate bending dynamics is developed. The formulation makes use of the static fundamental solutions for the weighted residual integral equations. The domain integrals carrying the inertia terms and generic static loads are considered as body forces and approximated with boundary values using the dual reciprocity method. The load is modelled as a series of impact loads of time varying intensity and moving in space in a predetermined path. The formulation was implemented and tested solving a benchmark problem. The results are compared with finite element solutions. Copyright (C) 2004 John Wiley Sons, Ltd MH - United Kingdom MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0029-5981 UR - ISI:000224603200008 L2 - plates;dynamics;Reissner;Galerkin;boundary elements;dual reciprocity;BOUNDARY-ELEMENT METHOD; VIBRATIONS; BEM SO - International Journal for Numerical Methods in Engineering 2004 ;61(7):1093-1106 11991 UI - 5581 AU - Perez-Lachaud G AU - Batchelor TP AU - Hardy ICW AD - Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, Leics, EnglandEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoHardy, ICW, Univ Nottingham, Sch Biosci, Sutton Bonington Campus, Loughborough LE12 5RD, Leics, England TI - Wasp eat wasp: facultative hyperparasitism and intra-guild predation by bethylid wasps AB - Bethylid wasps are primary parasitoids of coleopteran and lepidopteran pests of economic importance and have thus been deployed as biological control agents. We show that Cephalonomia hyalinipennis (Hym.: Bethylidae) is also a facultative hyper-parasitoid of four other bethylid species: Cephalonomia stephanoderis and Prorops nasuta, natural enemies of the coffee berry borer, Hypothenemus hampei (Col.: Scolytidae), and of Goniozus nephantidis and Goniozus legneri, which have been released against lepidopteran pests of coconuts and almonds, respectively. Conspecific and allospecific ovicide and larvicide are also observed, constituting intra-guild predation. Such trophic interactions have the potential to disrupt biological control in coffee, coconut, and almond agroecosystems. (C) 2004 Elsevier Inc. All rights reserved MH - United Kingdom MH - Mexico|Chiapas PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000221175700004 L2 - Hyperparasitism;intra-guild predation;bethylidae;Cephalonomia hyalinipennis;Cephalonomia stephanoderis;prorops nasuta;Goniozus;coffee berry borer;COFFEE BERRY BORER; HYPOTHENEMUS-HAMPEI COLEOPTERA; BIOLOGICAL-CONTROL; PARASITOID WASP; CLUTCH SIZE; SCOLYTIDAE; HYMENOPTERA; LEPIDOPTERA; ATTACKING; GONIOZUS SO - Biological Control 2004 ;30(2):149-155 11992 UI - 5104 AU - Perez-Leon JA AU - Sarabia G AU - Miledi R AU - Garcia-Alcocer G AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Det Neurobiol Celular & Mol, Lab Neurobiol Mol & Celular, Queretaro, MexicoUniv Autonoma Queretaro, Fac Quim, Queretaro 76010, MexicoUniv Calif Irvine, Dept Neurobiol & Behav, Mol & Cellular Neurobiol Lab, Irvine, CA 92697, USAPerez-Leon, JA, Univ Nacl Autonoma Mexico, Inst Neurobiol, Det Neurobiol Celular & Mol, Lab Neurobiol Mol & Celular, Campus Juriquilla,CP 76001,AP 1-1141, Queretaro, Mexico TI - Distribution of 5-hydroxytriptamine(2C) receptor mRNA in rat retina AB - There are several factors that suggest serotonin [5-hydroxytryptamine (5-HT)] plays a role as a neurotransmitter/neuromodulator within the retina. The presence of mRNAs encoding 5-HT receptors (5-HTR) of the types 5-HT2CR and 5-HT5AR within the rat retina was investigated using in situ hybridization of digoxigenin-labeled probes. The 5HT(5A)R probe produced no labeling, whereas the 5HT(2C)R probe hybridized in cells scattered in the inner nuclear and ganglion cell layers. Thus, the 5HT(2C)R gene is expressed by retinal neurons, some of which represent third-order neurons, either amacrine or ganglion cells. This suggests that 5-HT may modulate the outgoing signal from the retina. (C) 2004 Elsevier B.V All rights reserved MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences U5 - J;Article AV - English IS - 0169-328X UR - ISI:000222258900015 L2 - rat retina;serotonin receptor;in situ hybridization;PROTEIN-KINASE-C; POTENTIAL PRESYNAPTIC MODULATORS; SPONTANEOUS SYNAPTIC ACTIVITY; AMACRINE CELLS; GABA(C) RECEPTORS; MAMMALIAN RETINA; GANGLION-CELLS; RABBIT RETINA; BIPOLAR CELLS; ACTIVATION SO - Molecular Brain Research 2004 ;125(1-2):140-142 11993 UI - 4597 AU - Perez-Mendoza D AU - Dominguez-Ferreras A AU - Munoz S AU - Soto MJ AU - Olivares J AU - Brom S AU - Girard L AU - Herrera-Cervera JA AU - Sanjuan J AD - CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Granada 18008, SpainUNAM, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca, Morelos, MexicoSanjuan, J, CSIC, Dept Microbiol Suelo & Sistemas Simbiot, Estac Expt Zaidin, Prof Albareda 1, Granada 18008, Spain TI - Identification of functional mob regions in Rhizobium etli: Evidence for self-transmissibility of the symbiotic plasmid pRetCFN42d AB - An approach originally designed to identify functional origins of conjugative transfer (oriT or mob) in a bacterial genome (J. A. Herrera-Cervera, J. M. Sanjuan-Pinilla, J. Olivares, and J. Sanjuan, J. Bacteriol. 180:4583-4590, 1998) was modified to improve its reliability and prevent selection of undesired false mob clones. By following this modified approach, we were able to identify two functional mob regions in the genome of Rhizobium etli CFN42. One corresponds to the recently characterized transfer region of the nonsymbiotic, self-transmissible plasmid pRetCFN42a (C. Tun-Garrido, P. Bustos, V. Gonzalez, and S. Brom, J. Bacteriol. 185:1681-1692, 2003), whereas the second mob region belongs to the symbiotic plasmid pRetCFN42d. The new transfer region identified contains a putative oriT and a typical conjugative (tra) gene cluster organization. Although pRetCFN42d had not previously been shown to be self-transmissible, mobilization of cosmids containing this tra region required the presence of a wild-type pRetCFN42d in the donor cell; the presence of multiple copies of this mob region in CFN42 also promoted conjugal transfer of the Sym plasmid pRetCFN42d. The overexpression of a small open reading frame, named yp028, located downstream of the putative relaxase gene traA, appeared to be responsible for promoting the conjugal transfer of the R. etli pSym under laboratory conditions. This yp028-dependent conjugal transfer required a wild-type pRetCFN42d traA gene. Our results suggest for the first time that the R. etli symbiotic plasmid is self-transmissible and that its transfer is subject to regulation. In wild-type CFN42, pRetCFN42d tra gene expression appears to be insufficient to promote plasmid transfer under standard laboratory conditions; gene yp028 may play some role in the activation of conjugal transfer in response to as-yet-unknown environmental conditions MH - Mexico|Morelos MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000223459300022 L2 - GRAM-NEGATIVE BACTERIA; CONJUGAL TRANSFER; AGROBACTERIUM-TUMEFACIENS; BRADYRHIZOBIUM-JAPONICUM; SINORHIZOBIUM-MELILOTI; LEGUMINOSARUM STRAIN; REGULATORY SYSTEM; ESCHERICHIA-COLI; EXPRESSION; CLONING SO - Journal of Bacteriology 2004 ;186(17):5753-5761 11994 UI - 5434 AU - Perez-Mendoza J AU - guilera-Pena M AD - INIFAP, Celaya, Gto, MexicoPerez-Mendoza, J, USDA ARS, Grain Mkt & Prod Res Ctr, 1515 Coll Ave, Manhattan, KS 66502 USA TI - Development, reproduction, and control of the Indian meal moth, Plodia interpunctella (Hubner) (Lepidoptera : Pyralidae), in stored seed garlic in Mexico AB - Developmental time, fecundity, and egg hatch rate were determined for the Indian meal moth, Plodia interpunctella (Hubner), reared on fresh garlic seed at room temperature: in Mexico. Duration of the egg stage averaged 4.7 +/- 0.8 days with an egg hatch rate ranging from 82% to 95%. Five larval instars were determined based on head-capsule width. Total larval developmental time from egg hatch to adult emergence ranged from 42 to 47 days. Adult females began to oviposit within 12-48 h after mating with the maximum oviposition rate occurring during the first 24 h after mating. The mean (+/-SE) number of eggs laid by females was 212 +/- 34 with a range of 117-303. Application of pirimiphos-methyl, malathion, and permethrin to 30 kg lots of garlic seed failed to prevent infestation and bulb damage by the larvae. However, compared with controls, the percentage of damaged bulbs and the number of larvae detected during 12 weeks of storage was smaller on garlic treated with four doses of pirimiphos-methyl. Published by Elsevier Science Ltd MH - USA MH - Mexico|Guanajuato PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0022-474X UR - ISI:000221628000005 L2 - Plodia interpunctella;diet;garlic;development;fecundity;egg hatch;insecticides;SUSCEPTIBILITY; TEMPERATURE; VARIETIES; SURVIVAL; PRODUCTS; BIOLOGY; PEST SO - Journal of Stored Products Research 2004 ;40(4):409-421 11995 UI - 5418 AU - Perez-Ramirez M AU - Fox C AD - Inst Invest Elect, Cuernavaca 62490, Morelos, Mexico. Univ Essex, Dept Comp Sci, Colchester CO4 3SQ, Essex, England TI - The role of imperatives in inference, agents, and actions AB - The aim of this paper is to present a model for the interpretation of imperative sentences in which reasoning agents play the role of speakers and hearers. A requirement is associated with both the person who makes and the person who receives the order which prevents the hearer coming to inappropriate conclusions about the actions s/he has been commanded to do. By relating imperatives with the actions they prescribe, the dynamic aspect of imperatives is captured and by using the idea of encapsulation, it is possible to distinguish what is demanded from what is not. These two ingredients provide agents with the tools to avoid inferential problems in interpretation MH - United Kingdom MH - Mexico|Morelos T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlemperez@iie.org.mx foxcj@essex.ac.uk0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600046 SO - 2004 ;():448-457 11996 UI - 5941 AU - Perez-Ramirez M AU - Fox C AD - Inst Invest Elect, Cuernavaca 62490, Morelos, Mexico. Univ Essex, Dept Comp Sci, Colchester CO4 3SQ, Essex, England TI - Agents interpreting imperative sentences AB - The aim of this paper is to present a model for the interpretation of imperative sentences in which reasoning agents play the role of speakers and hearers. A requirement is associated with both the person who makes and the person who receives the order, which prevents the hearer coming to inappropriate conclusions about the actions s/he has been commanded to do. By relating imperatives with the actions they prescribe, the dynamic aspect of imperatives is captured. Further, by using the idea of encapsulation, it is possible to distinguish what is demanded by an imperative from the inferential consequences of the imperative. These two ingredients provide agents with the tools to avoid inferential problems in interpretation MH - United Kingdom MH - Mexico|Morelos T3 - COMPUTATIONAL LINGUISTICS AND INTELLIGENT TEXT PROCESSINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlemperez@iie.org.mx foxcj@essex.ac.uk0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY59Y AV - English IS - 0302-9743 UR - ISI:000189417900007 SO - 2004 ;():56-67 11997 UI - 5890 AU - Perez-Salicrup DR AU - Schnitzer S AU - Putz FE AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58190, Michoacan, MexicoUniv Wisconsin, Dept Biol Sci, Milwaukee, WI 53201, USAUniv Florida, Dept Bot, Gainesville, FL 32611, USAPerez-Salicrup, DR, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Antigua Carretera Patzcuaro 8701, Morelia 58190, Michoacan, Mexico TI - Community ecology and management of lianas MH - Mexico|Michoacan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Forestry U5 - J;Editorial Material AV - English IS - 0378-1127 UR - ISI:000220456000001 SO - Forest Ecology and Management 2004 ;190(1):1-2 11998 UI - 4498 AU - Perez A AU - Ramirez-Duron R AU - Pineyro-Lopez A AU - Waksman N AU - Reichert M AU - Bringmann G AD - Univ Wurzburg, Inst Organ Chem, D-97074 Wurzburg, GermanyUANL, Dept Analyt Chem, Sch Med, Monterrey 64841, Nuevo Leon, MexicoUANL, Dept Pharmacol & Toxicol, Sch Med, Monterrey 64841, Nuevo Leon, MexicoWaksman, N, Univ Wurzburg, Inst Organ Chem, Hubland, D-97074 Wurzburg, Germany TI - The absolute configuration of peroxisomicines A1 and A2 AB - Peroxisomicine A1 is a potentially antineoplastic compound isolated from the seeds of Karwinskia parvifolia. It is considered as a useful chemotype for the preparation of topoisomerase II targeted anticancer cells. Stereochemically, it is characterized by the presence of two stereocenters and a rotationally hindered and thus likewise stereogenic biaryl axis. In this contribution, the absolute configuration of peroxisomicine A1 and its epimer, peroxisomicine A2, was established by means of a five-step degradative procedure giving the respective R- and S-configured methyl 2-(2'-methyl-5'-oxotetrahydrofuryl)acetates. The configuration of the degradation product was obtained by means of optical rotation, H-1 NMR analysis using a chiral displacement reagent, and by experimental and quantum chemical circular dichroism (CD) investigations. Based on the results obtained here and considering our previous work on the relative configuration at centers versus axis of these compounds, peroxisomicine A1 resulted to be the P,3S,3'S-isomer and peroxisomicine A2 the P,3R,3'S-isomer. (C) 2004 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Nuevo Leon PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000223654700023 L2 - peroxisomicine;dihydroxyanthracenones;degradation;chiral displacement reagent;circular dichroism;CELL-LINES; T-514; A(1) SO - Tetrahedron 2004 ;60(38):8547-8552 11999 UI - 3057 AU - Perez CM AU - az-Cueto L AU - Schwarze JE AU - Raabe T AU - Gerton GL AD - Univ Penn, Philadelphia, PA 19104, USAInst Mexicano Seguro Social, Mexico City, DF, Mexico TI - Acrogranin, the granulin and epithelin precursor, is required for mouse embryo implantation MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000224010800728 SO - Fertility and Sterility 2004 ;82():S277-S277 12000 UI - 3058 AU - Perez CM AU - Jun JH AU - az-Cueto L AU - Schwarze E AU - Gerton GL AD - Univ Penn, Philadelphia, PA 19104, USASamsung Cheil Hosp, Seoul, South KoreaWomens Healthcare Ctr, Seoul, South KoreaInst Mexicano Seguro Social, Mexico City, DF, Mexico TI - In vivo acrogranin uterine biological activity is mediated by ovarian steroids in mouse uterus MH - Mexico|Distrito Federal MH - South Korea MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0015-0282 UR - ISI:000224010800729 SO - Fertility and Sterility 2004 ;82():S277-S278 12001 UI - 5268 AU - Perez MEM AU - Macek M AU - Galvan MTC AD - Natl Autonomous Univ Mexico, Thalnepantla 54090, Edo Mexico, MexicoAcad Sci Czech Republ, Inst Hydrobiol, Ceske Budejovice 37005, Czech RepublicMacek, M, Natl Autonomous Univ Mexico, Campus Iztacala, Thalnepantla 54090, Edo Mexico, Mexico TI - Do protozoa control the elimination of Vibrio cholerae in brackish water? AB - Elimination of inoculated Vibrio cholerae (greater than or equal to10(7) cells ml(-1)) within a brackish water bacteria assemblage (Mecoacan Lagoon, State of Tabasco, Mexico) was studied in laboratory microcosms with filtration-fractionated water. Feeding of a ciliate, Cyclidium glaucoma was evaluated using fluorescently labelled V. cholerae O1. Even though V. cholerae was not exploited as the major food source, ciliates were able to eliminate it efficiently. An addition of chitin directly supported the growth of bacteria, although not so much of V. cholerae, and indirectly the growth of the protistan assemblage. Generally, the changes in a bacterial assemblage structure were the most important in V. cholerae elimination MH - Czech Republic MH - Mexico|Estado De Mexico PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 1434-2944 UR - ISI:000222028900008 L2 - Cyclidium glaucoma;ciliate feeding selectivity;toxin producing bacteria;MONOCLONAL-ANTIBODY; BANGLADESH WATERS; GROWTH-RESPONSES; BACTERIAL PREY; CYCLIDIUM SP; CULTURE; CELLS; BACTERIOPLANKTON; ASSEMBLAGES; VULNIFICUS SO - International Review of Hydrobiology 2004 ;89(2):215-227 12002 UI - 6184 AU - Perez MEM AU - Macek M AU - Galvan MTC AD - Natl Autonomous Univ Mexico, Tlalnepantla 54090, MexicoAcad Sci Czech Republ, Inst Hydrobiol, Ceske Budejovice 37001, Czech RepublicMacek, M, Natl Autonomous Univ Mexico, Campus Iztacala, Tlalnepantla 54090, Mexico TI - In situ measured elimination of Vibrio cholerae from brackish water AB - In situ elimination of fluorescently labelled Vibrio cholerae (FLB) was measured in two saline water bodies in Mexico: in a brackish water lagoon, Mecoacan (Gulf of Mexico; State of Tabasco) and an athalassohaline lake, Alchichica (State of Puebla). Disappearance rates of fluorescently labelled V. cholera O1 showed that they were eliminated from the environment at an average rate of 32% and 63 %/day, respectively (based on the bacterial standing stocks). The indirect immunofluorescence method confirmed the presence of V. cholerae O1 in the lagoon. However, the elimination of FLB was not directly related either to the presence or absence of the bacterium in the water body or to the phytoplankton concentration MH - Czech Republic MH - Mexico|Estado De Mexico PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 1360-2276 UR - ISI:000189083600017 L2 - Vibrio cholerae;protozoan feeding;brackish water;MONOCLONAL-ANTIBODY; BANGLADESH WATERS; PHYTOPLANKTON; BACTERIA; CELLS; ENVIRONMENT; VULNIFICUS; CULTURE; CHITIN; SEA SO - Tropical Medicine & International Health 2004 ;9(1):133-140 12003 UI - 4613 AU - Perez MVA AU - Castaneda JG AU - Frias-Hernandez JT AU - Franco-Hernandez O AU - Van Cleemput O AU - Dendooven L AU - Olalde V AD - Inst Politecn Nacl, CINVESTAV, Dept Biotecnol & Bioingn, Mexico City 07000, DF, MexicoIPN, CINVESTAV, Dept Biotecnol & Bioquim, Unidad Irapuato, Guanajuato, MexicoState Univ Ghent, Fac Agr & Appl Biol Sci, Lab Appl Phys Chem, B-9000 Ghent, BelgiumUniv Guanajuato, Inst Ciencias Agr, Guanajuato 36500, MexicoDendooven, L, Inst Politecn Nacl, CINVESTAV, Dept Biotecnol & Bioingn, Ave Inst Politecn Nacl 2508, Mexico City 07000, DF, Mexico TI - Trace gas emissions from soil of the central highlands of Mexico as affected by natural vegetation: a laboratory study AB - In the central highlands of Mexico, mesquite (Prosopis laevigata) and huisache (Acacia schaffneri), N-2-fixing trees or shrubs, dominate the vegetation and are currently used in a reforestation program to prevent erosion. We investigated how natural vegetation or cultivation of soil affected oxidation of CH4, and production of N2O. Soil was sampled under the canopy of mesquite (MES treatment) and huisache trees (HUI treatment), outside their canopy (OUT treatment) and from fields cultivated with maize (ARA treatment) at three different sites while production of CO2, and dynamics of CH4, N2O and inorganic N (NH4+, and NO3-) were monitored in an aerobic incubation. The production of CO2 was 2.3 times higher and significantly greater in the OUT treatment, 3.0 times higher in the MES treatment and 4.0 times higher in the HUI treatment compared to the ARA treatment. There was no significant difference in oxidation of CH4 between the treatments, which ranged from 0.019 mug CH4-C kg(-1) day(-1) for the HUI treatment to 0.033 CH4-C kg(-1) day(-1) for the MES treatment. The production of N2O was 30 mug N2O-N kg(-1) day(-1) in the MES treatment and >8 times higher compared to the other treatments. The average concentration of NO3- was 2 times higher and significantly greater in the MES treatment than in the HUI treatment, 3 times greater than in the OUT treatment and 10 times greater than in the ARA treatment. It was found that cultivation of soil decreased soil organic matter content, C and N mineralization, but not oxidation of CH4 or production of N2O MH - Belgium MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Soil Science U5 - J;Article AV - English IS - 0178-2762 UR - ISI:000223557500006 L2 - carbon dynamics;nitrogen dynamics;huisache (Acacia schaffneri);mesquite (Prosopis spp.);methane;SONORAN DESERT ECOSYSTEM; NITROUS-OXIDE FLUXES; LAND-USE; METHANE OXIDATION; CLIMATE-CHANGE; CH4 OXIDATION; ATMOSPHERIC METHANE; MESQUITE PROSOPIS; CO2 EMISSIONS; FOREST SOILS SO - Biology and Fertility of Soils 2004 ;40(4):252-259 12004 UI - 3706 AU - Perez RAL AU - Ballesteros LMH AD - Univ Iowa, Dept Geosci, Iowa City, IA 52242, USAUniv Mar, Inst Recursos, Oaxaca 70902, MexicoPerez, RAL, Univ Iowa, Dept Geosci, Iowa City, IA 52242, USA TI - Coral community structure and dynamics in the Huatulco area, western Mexico AB - Coral reef community structure and dynamics have been poorly studied in places where high interannual variability is likely to occur. We conducted a quantitative interannual analysis of reef community structure and dynamics at five localities in Huatulco Pacific coast of Mexico. Between November 2000 and October 2001, monthly belt transects were surveyed in each locality. Cluster analysis, multidimensional scaling, and analysis of similarity demonstrated that even closely located sites (< 5 km) had community structures that differed by more than expected by chance. Nonetheless, all of the communities were dominated by pocilloporid species. Although there were variations in community structure through time, except for Jicaral-Chachacual, none was greater than expected by chance. A major disturbance occurred during February 2001 at Jicaral-Chachacual which selectively removed Pocillopora damicornis (Linnaeus, 1758). Temporal analysis of community structure at Jicaral-Chachacual following the disturbance suggests: (a) the existence of a progressive temporal change in community structure, and (b) the importance of Porites panamensis Verrill, 1866 and pocilloporid species, early and later in the successional stages. Analysis of coral reef community structure and dynamics, and oceanographic and historical data, suggest that Huatulco represents a mosaic of patches at different stages of recovery following disturbances MH - Mexico|Oaxaca MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000225681900008 L2 - EASTERN PACIFIC; REEF; GULF; SCLERACTINIA; PERSPECTIVES; BIOGEOGRAPHY; TEHUANTEPEC; SCALES; REGION; COAST SO - Bulletin of Marine Science 2004 ;75(3):453-472 12005 UI - 6492 AU - Perez RPY AU - Sharples M AD - Univ Nacl Autonoma Mexico, Lab Cibernet Aplicada, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoUniv Birmingham, Sch Engn, Educ Technol Res Grp, Birmingham B15 2TT, W Midlands, EnglandPerez, RPY, Univ Nacl Autonoma Mexico, Lab Cibernet Aplicada, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Circuito Exterior S-N Ciudad Univ, Mexico City 04510, DF, Mexico TI - Three computer-based models of storytelling: BRUTUS, MINSTREL and MEXICA AB - This paper attempts to establish criteria to analyse and evaluate computer models of creativity in writing. The paper provides a brief review of the antecedents of automatic story-generation and offers a proposal for the analysis and evaluation of computer models of creativity in writing. It reviews three major projects to develop computer-based storywriters published between 1993 and 2000 and analyses their approach, similarities, differences and contributions. It compares the three approaches and discusses implications for the modelling of creativity in writing and the design of future story generation systems. (C) 2003 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0950-7051 UR - ISI:000187960400002 L2 - BRUTUS;MINSTREL;MEXICA;computer-based storytelling;creativity;C-creativity;predefined structures;story-predictability;structure-predictability;content-predictability;engagement;reflection;transform recall adapt methods;creative distance;STORY GRAMMARS SO - Knowledge-Based Systems 2004 ;17(1):15-29 12006 UI - 3963 AU - Perfecto I AU - Vandermeer JH AU - Bautista GL AU - Nunez GI AU - Greenberg R AU - Bichier P AU - Langridge S AD - Univ Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109, USAUniv Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109, USAECOSUR, Lab Ecoethol, Tapachula, Chiapas, MexicoSmithsonian Migratory Bird Ctr, Washington, DC 20008, USAUniv Calif Santa Cruz, Coll Environm Sci, Santa Cruz, CA 95064, USAPerfecto, I, Univ Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109 USA TI - Greater predation in shaded coffee farms: The role of resident neotropical birds AB - It is commonly thought that diverse agroecosystems are less prone to pest outbreaks because they support a high diversity of natural enemies. The idea that diversity stabilizes functional properties of communities to environmental perturbation is formalized in the ecological literature as the "insurance hypothesis." Recently this hypothesis has been examined theoretically and in microcosm experiments. However it has not been tested empirically in an agroecosystem. Here we provide a test of the insurance hypothesis by examining insect predation by birds in coffee farms with different levels of plant diversity. Lepidopteran larvae were placed in coffee plants, and larval disappearance rates were measured within and outside bird exclosures in two farms with distinct levels of shade. Significant differences were found associated with the exclosure treatment, indicating that birds can potentially prevent pest outbreaks. Furthermore, the effect was significant only for the, farm with a high floristic diversity, providing partial evidence in support of the insurance hypothesis MH - USA MH - Mexico|Chiapas PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Ecology U5 - J;Article AV - English IS - 0012-9658 UR - ISI:000224844700005 L2 - agricultural intensification;avian insectivory;biodiversity;biological control;Chiapas, Mexico;coffee agroecosystem;cross-trophic interactions;ecosystem function;insectivorous birds;herbivory;insurance hypothesis;natural enemies;shaded coffee farms;FOOD-WEB COMPLEXITY; BIODIVERSITY; INSECTS; PLANTATIONS; DIVERSITY; POPULATIONS; CASCADES SO - Ecology 2004 ;85(10):2677-2681 12007 UI - 3695 AU - Perry JD AU - Aguilar CL AU - Kuchtey R AD - Cleveland Clin Fdn, Cole Eye Inst, Div Ophthalmol, Cleveland, OH 44195, USAMil Hosp, Div Oculoplast & Orbital Surg, Mexico City, DF, MexicoPerry, JD, Cleveland Clin Fdn, Cole Eye Inst, Div Ophthalmol, 9500 Euclid Ave, Cleveland, OH 44195 USA TI - Modified vertical mattress technique for eyelid margin repair AB - BACKGROUND. Eyelid margin repair requires meticulous technique to avoid trichiasis, inadequate cosmesis, and eye injury. OBJECTIVE. The objective was to describe a simplified repair technique for simple eyelid margin defects. METHODS. A simplified technique for eyelid margin repair using a vertical mattress suture just posterior to the gray line is described. RESULTS. This simplified technique allows for excellent eyelid margin repair with a low incidence of notching and a high level of cosmetic satisfaction. CONCLUSION. Eyelid margin repair using an absorbable vertical mattress suture allows for excellent wound healing and cosmesis MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 1 U4 - Dermatology;Surgery U5 - J;Editorial Material AV - English IS - 1076-0512 UR - ISI:000225685100021 SO - Dermatologic Surgery 2004 ;30(12):1580-1582 12008 UI - 3772 AU - Pestryakov AN AU - Petranovskii VP AU - Pfander N AU - Knop-Gericke A AD - Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, GermanyUNAM, Ctr Ciencias Materia Condensada, Ensenada 22800, Baja California, MexicoPestryakov, AN, Tomsk Tech Univ, Dept Organ Chem, Lenin Ave 30, Tomsk 634034, Russia TI - Supported foam-copper catalysts for methanol selective oxidation AB - Structural, mechanical, gas-dynamic and catalytic properties of copper catalysts supported on foam ceramics have been studied. Due to the three-dimensional open-porous cellular structure the foam catalysts have high gas permeability, mechanical strength, and low density. Catalytic activity and selectivity of the foam catalysts in the process of oxidation of methanol to formaldehyde exceed the characteristics of the conventional crystalline and granulated catalysts of the same composition. Different electronic states (ions, charged clusters, nanoparticles and microcrystals) of copper on the catalyst surface have been studied by the method of UV-Vis spectroscopy. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Baja California MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1566-7367 UR - ISI:000225542300012 L2 - copper;foam catalysts;methanol oxidation;UV-vis spectroscopy;RAY-ABSORPTION SPECTROSCOPY; ALCOHOL PARTIAL OXIDATION; SILVER CATALYSTS; DIFFUSE-REFLECTANCE; ELECTRONIC-STATE; METAL-CATALYSTS; ACTIVE-SITES; SURFACE SO - Catalysis Communications 2004 ;5(12):777-781 12009 UI - 4953 AU - Pestryakov AN AU - Bogdanchikova NE AU - Knop-Gericke A AD - MPG, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, GermanyUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoPestryakov, AN, MPG, Fritz Haber Inst, Dept Inorgan Chem, Faradayweg 4-6, D-14195 Berlin, Germany TI - Alcohol selective oxidation over modified foam-silver catalysts AB - Catalysts based on silver supported on foam ceramics and modified by Zr, Cc and La oxides have been studied in the process of partial oxidation of methanol to formaldehyde. The foam catalysts exhibit high catalytic, mechanical and fluidodynamic properties exceeding the characteristics of conventional crystalline and supported silver samples. Modifying additives of Zr and Cc oxides raise activity and selectivity of the supported foam-silver catalyst as well as its stability during the prolonged functioning. The modifiers change the electronic state and redox properties of silver, the metal dispersivity, surface diffusion and aggregation of silver during the long-term service. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000222691000010 L2 - foam-silver catalyst;methanol oxidation;UV-Vis spectroscopy;DIFFUSE-REFLECTANCE; METHANOL OXIDATION; METAL-CATALYSTS; DEEP OXIDATION; FORMALDEHYDE; STATE; HYDROCARBONS; OXYGEN SO - Catalysis Today 2004 ;91-92():49-52 12010 UI - 6303 AU - Pestryakov AN AU - Petranovskii VP AU - Kryazhov A AU - Ozhereliev O AU - Pfander N AU - Knop-Gericke A AD - Fritz Haber Inst MPG, Dept Inorgan Chem, D-14195 Berlin, GermanyCtr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSeversk Technol Inst, Seversk 634003, RussiaPestryakov, AN, Fritz Haber Inst MPG, Dept Inorgan Chem, Faradayweg 4-6, D-14195 Berlin, Germany TI - Study of copper nanoparticles formation on supports of different nature by UV-Vis diffuse reflectance spectroscopy AB - Supported copper particles are widely used in heterogeneous catalysis. Influence of supports of different nature on the Cu particles formation is studied by the methods of UV-Vis spectroscopy of diffuse reflectance, XRD and electron microscopy. Different states of supported copper have been identified by UV-Vis spectroscopy: absorption bands at 250 (Cu+), 320-370 and 400-440 (charge transfer bands of O-Cu-O and Cu-O-Cu complexes), 520-580 (Cu, plasmon resonance) and 620-850 nm (d-d transitions in Cu2+ ions). The size of Cu clusters and Cu-n/Cu-n(delta+) ratio strongly depends on the support nature. n (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Baja California MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000188804400003 L2 - ALUMINUM DISTRIBUTION; NO DECOMPOSITION; CATALYSTS; CLUSTERS; ZEOLITE; OXIDE; DISSOCIATION; OXIDATION; BEHAVIOR; CU-ZSM-5 SO - Chemical Physics Letters 2004 ;385(3-4):173-176 12011 UI - 3322 AU - Peterson AT AU - Komar N AU - Komar O AU - Navarro-Siguenza A AU - Robbins MB AU - Martinez-Meyer E AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USASalvaNATURA, Conservat Sci Program, San Salvador, El SalvadorCtr Dis Control & Prevent, Div Vector Borne Infect Dis, Arbovirus Dis Branch, Arbovirus Ecol Lab, Ft Collins, CO 80521, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Museo Zool, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, 1345 Jayhawk Blvd, Lawrence, KS 66045 USA TI - West Nile virus in the New World: potential impacts on bird species AB - The past five years have seen the arrival and extremely rapid expansion of West Nile virus (WNV) in the Western Hemisphere. The rapid sweep across North America has permitted little time for developing knowledge of the virus's potential impacts on wildlife in the New World. Given this information gap, we here summarize for the ornithological community what is known or can be anticipated for WNV's effect on bird communities in coming years. Our particular focus is on impacts of WNV on the conservation status of birds, the principal vertebrate reservoir for the virus MH - El Salvador MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 8 U4 - Ornithology U5 - J;Article AV - English IS - 0959-2709 UR - ISI:000226573100001 L2 - NEW-YORK-CITY; LINKED IMMUNOSORBENT ASSAYS; NORTHEASTERN UNITED-STATES; SEROLOGIC EVIDENCE; EXPERIMENTAL-INFECTION; VECTOR COMPETENCE; AMERICAN CROWS; DNA VACCINE; SURVEILLANCE; OUTBREAK SO - Bird Conservation International 2004 ;14(4):215-232 12012 UI - 4458 AU - Peterson AT AU - Martinez-Meyer E AU - Gonzalez-Salazar C AU - Hall PW AD - Univ Kansas, Nat Hist Museum, Lawrence, KS 66044, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66044, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoWorld Conservat Monitoring Ctr, UN Environm Programme, Biodivers Informat Serv, Cambridge, EnglandPeterson, AT, Univ Kansas, Nat Hist Museum, Lawrence, KS 66044, USA TI - Modeled climate change effects on distributions of Canadian butterfly species AB - Climate change effects on biodiversity are being documented now frequently in the form of changes in phenology and distributional shifts. However, the form that these effects will take over a longer timespan is unclear; for this understanding, a quantitative, validated, predictive approach is key. Here, we use ecological niche modeling and general circulation model outputs to estimate future potential geographic distributions of 111 Canadian butterfly species. We develop future estimates under two emission scenarios from each of two climate change modeling centers; future projections for biodiversity are not only scenario dependent (more severe emission scenarios produce more severe effects on species' distributions) but also model dependent (the Canadian Centre for Climate Modelling and Analysis results were more severe than the Hadley Centre results). One interesting feature is the appearance of disjunctions in species' distributions, hence creating "vicariant events" over very short time periods. In general, however, a cost of 1%-3% additional loss of species' distributions is associated with more severe scenarios of emissions and climate change, suggesting that subtle biodiversity consequences are associated with the different climate futures debated in political circles MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 10 U4 - Zoology U5 - J;Article AV - English IS - 0008-4301 UR - ISI:000223983200003 L2 - EUROPEAN HIGHER-PLANTS; GEOGRAPHIC DISTRIBUTIONS; BIOSPHERE MODEL; NICHE; CONSEQUENCES; PREDICTION; DIVERSITY; RESPONSES; PATTERNS; RANGES SO - Canadian Journal of Zoology-Revue Canadienne de Zoologie 2004 ;82(6):851-858 12013 UI - 5154 AU - Peterson AT AU - Martinez-Meyer E AU - Gonzalez-Salazar C AD - Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoPeterson, AT, Univ Kansas, Museum Nat Hist, Lawrence, KS 66045, USA TI - Reconstructing the Pleistocene geography of the Aphelocoma jays (Corvidae) AB - Understanding historical distributions of species and evolving lineages has been a topic of considerable interest, yet methods used to date have not provided detailed, quantitative distributional hypotheses. Here, we present a technique based on models of species' ecological niches and Pleistocene climate reconstructions that provides such hypotheses, providing the example of reconstructions for the Aphelocoma jays. We demonstrate in general a greater degree than expected of stability in jay species' distributional areas back through at least the most recent glaciation event, and that existing patterns of genetic differentiation may date to before the Late Pleistocene glaciations. More generally, the method offers the potential for reconstructing historical distributions of species or lineages, and providing a detailed geographic framework for addressing many biogeographic and systematic questions MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 13 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1366-9516 UR - ISI:000222261400001 L2 - Pleistocene distribution;potential distribution;speciation;FLORIDA SCRUB-JAY; EASTERN NORTH-AMERICA; GLOBAL CLIMATE-CHANGE; LAST GLACIAL MAXIMUM; NICHE DIFFERENTIATION; SPECIES INVASIONS; PREDICTIVE MODELS; SOCIAL-BEHAVIOR; EXTINCTION RISK; LATE QUATERNARY SO - Diversity and Distributions 2004 ;10(4):237-246 12014 UI - 6326 AU - Petty RE AU - Southwood TR AU - Manners P AU - Baum J AU - Glass DN AU - Goldenberg J AU - He XH AU - Maldonado-Cocco J AU - Orozco-Alcala J AU - Prieur AM AU - Suarez-Almazor ME AU - Woo P AD - Univ British Columbia, Dept Pediat, Div Rheumatol, Vancouver, BC V6T 1W5, CanadaUniv Birmingham, Dept Rheumatol, Birmingham, W Midlands, EnglandUniv Western Australia, Sch Paediat & Child Hlth, Perth, WA 6009, AustraliaUniv Rochester, Dept Pediat, Rochester, NY, USAChildrens Hosp, Med Ctr, Dept Pediat, Div Rheumatol, Cincinnati, OH 45229, USAEscola Paulista Med, Dept Rheumatol, BR-04023 Sao Paulo, BrazilBeijing Childrens Hosp, Dept Rheumatol, Beijing, Peoples R ChinaUniv Coll London, Sch Med, Pediat Rheumatol Unit, London W1N 8AA, EnglandBaylor Coll Med, Houston, TX 77030, USAHop Necker Enfants Malad, Pediat Immunohematol & Rheumatol Unit, Paris, FranceHosp Civil, Dept Rheumatol, Guadalajara, Jalisco, MexicoUniv Buenos Aires, Dept Rheumatol, Buenos Aires, DF, ArgentinaPetty, RE, British Columbia Childrens Hosp, Ambulatory Care Ctr K 4 121, 4480 Oak St, Vancouver, BC V6H 3V4, Canada TI - International league of associations for rheumatology classification of juvenile idiopathic arthritis: Second revision, Edmonton, 2001 MH - Argentina MH - Australia MH - Brazil MH - Canada MH - United Kingdom MH - France MH - Mexico|Jalisco MH - Peoples R China MH - USA PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 160 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000188735200030 L2 - DURBAN CRITERIA SO - Journal of Rheumatology 2004 ;31(2):390-392 12015 UI - 2975 AU - Pham T AU - Landewe R AU - Dougados M AU - Burgosvargas R AU - Collantes-Estevez E AU - Edmonds J AU - Emery P AU - van der Horst I AU - Mielants H AU - Olivieri I AU - Rudwaleit M AU - Stone M AU - van der Linden S AU - van der Heijde D AD - CHU Concept, Marseille, FranceUniv Hosp Maastricht, Maastricht, NetherlandsCochin Hosp, Paris, FranceHosp Gen Mexico City, Mexico City, DF, MexicoUniv Cordoba, E-14071 Cordoba, SpainSt George Hosp, Sydney, NSW, AustraliaUniv Leeds, Leeds LS2 9JT, W Yorkshire, EnglandVrije Univ Amsterdam, Med Ctr, Amsterdam, NetherlandsState Univ Ghent Hosp, B-9000 Ghent, BelgiumOsped San Carlo Borromeo Milano, Potenza, ItalyCharite, Berlin, GermanyToronto Western Hosp, Toronto, ON M5T 2S8, Canada TI - ISSAS : International start TNF-blocker study in ankylosing spondylitis MH - Australia MH - Belgium MH - Canada MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Spain PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000223799000523 SO - Arthritis and Rheumatism 2004 ;50(9):S216-S216 12016 UI - 5756 AU - Phelan T AU - Buschang PH AU - Behrents RG AU - Wintergerst AM AU - Ceen RF AU - Hernandez A AD - Texas A&M Univ, Baylor Coll Dent, Dept Orthodont, Dallas, TX 75246, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoBuschang, PH, Texas A&M Univ, Baylor Coll Dent, Dept Orthodont, 3302 Gaston Ave, Dallas, TX 75246 USA TI - Variation in class II malocclusion: Comparison of Mexican mestizos and American whites AB - This study compared the skeletal and dental characteristics of Class II Division 1 white Americans and Mexicans. It was designed specifically to the evaluate ethnic, age, and sex differences of 101 whites and 107 Mexican mestizos, with approximately equal numbers in each subgroup. Three-way analyses of variance were used to simultaneously evaluate the effects of age, sex, ethnicity, and their interactions. Although Mexicans and whites in the United States had similar maxillomandibular relationships, Mexicans showed greater protrusion of the jaws and teeth. Mexican subjects with Class II malocclusions also showed less divergence of the cranial base (SN-FH angle) and greater vertical tendencies (MPA, Y-axis, and palatal plane angle) than their white counterparts. In comparison with children (mean age 9.0 years), young adults (mean age 20.1 years) had significantly larger craniofacial dimensions, jaws that were positioned more forward, and teeth that were more protruded. Sex differences pertained only to size (men were larger) and maxillary incisor angulation (men were more protrusive). The findings pertaining to the ethnic differences have important clinical implications regarding treatment decisions for Mexican and white patients. In addition, this study provides a foundation for future studies pertaining to Class II malocclusion in Mexicans MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0889-5406 UR - ISI:000220790900003 L2 - UNTREATED CLASS-II; CEPHALOMETRIC NORMS; PUBERTAL CHANGES; GROWTH; DIVISION-1; CHILDREN; PATTERN; AGES; POPULATIONS; MORPHOLOGY SO - American Journal of Orthodontics and Dentofacial Orthopedics 2004 ;125(4):418-425 12017 UI - 6229 AU - Phelps DS AU - Umstead TM AU - Mejia M AU - Carrillo G AU - Pardo A AU - Selman M AD - Penn State Univ, Milton S Hershey Med Ctr, Coll Med, Dept Pediat, Hershey, PA 17033, USANatl Inst Resp Dis, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Fac Sci, Mexico City 04510, DF, MexicoPhelps, DS, Penn State Univ, Milton S Hershey Med Ctr, Coll Med, Dept Pediat, POB 850, Hershey, PA 17033 USA TI - Increased surfactant protein-A levels in patients with newly diagnosed idiopathic pulmonary fibrosis AB - Study objectives: To measure surfactant protein-A (SP-A) in the BAL of patients with idiopathic pulmonary fibrosis (IPF). Design: We examined SP-A in BAL and lung tissue of patients with IPF who met the stricter recommended criteria for IPF at the time of diagnosis and prior to the beginning of treatment. Patients: Twenty-six patients with IPF confirmed at biopsy and 22 patients with hypersensitivity pneumonitis (HP) were compared with 9 normal volunteers. Interventions: All patients were subjected to pulmonary function testing, BAL, and lung biopsy prior to the beginning of treatment. Measurements and results: We measured SP-A in BAL fluids and performed SP-A immunohistochemistry on lung specimens. Lung tissues of patients with IPF showed extensive type II cell hyperplasia, usually containing greatly increased levels of immunoreactive SP-A. By enzyme-linked immunosorbent assay, we found a twofold increase over normal values in BAL SP-A without changes in total phospholipids. These data were in agreement with semiquantitative assessments of SP-A by protein immunoblotting and by Western blotting of sodium dodecyl sulfate gels. Patients with HP exhibited a threefold increase of BAL SP-A. Conclusions: The reasons for the difference between our results and previously published reports describing decreased SP-A levels in OF is not clear. It may relate to the stricter criteria for diagnosis, the absence of treatment prior to BAL, differences in the patient population, or to other methodologic differences MH - Mexico|Distrito Federal MH - USA PB - NORTHBROOK: AMER COLL CHEST PHYSICIANS RP - NOT IN FILE U3 - TC 9 U4 - Respiratory System U5 - J;Article AV - English IS - 0012-3692 UR - ISI:000188978400040 L2 - hypersensitivity pneumonitis;idiopathic pulmonary fibrosis;interstitial lung disease;surfactant;surfactant protein-A;MONOCYTIC CELL-LINE; BRONCHOALVEOLAR LAVAGE FLUID; HYPERSENSITIVITY PNEUMONITIS; LYMPHOCYTE-PROLIFERATION; ALVEOLAR MACROPHAGES; LUNG-DISEASES; HOST-DEFENSE; ABNORMALITIES; THP-1; EXPRESSION SO - Chest 2004 ;125(2):617-625 12018 UI - 5820 AU - Philbrick CT AU - Novelo AR AU - Irgang BE AD - Western Connecticut State Univ, Dept Biol & Environm Sci, Danbury, CT 06810, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoUniv Fed Rio Grande Sul, Dept Bot, BR-91570950 Porto Alegre, RS, BrazilPhilbrick, CT, Western Connecticut State Univ, Dept Biol & Environm Sci, Danbury, CT 06810 USA TI - A new species of Ceratolacis (Podostemaceae) from Minas Gerais, Brazil AB - A new species of Ceratolacis (C. pedunculatum, Podostemaceae) is illustrated and described. The new species is known from four locations in central Minas Gerais, Brazil. Ceratolacis pedunculatum is distinguished from the only other species of the genus based on the presence of a prominent peduncle and the oblique orientation of the ovary on the pedicel MH - Brazil MH - USA MH - Mexico|Distrito Federal PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000220508700019 L2 - Brazil;Ceratolacis;Podostemaceae SO - Novon 2004 ;14(1):108-113 12019 UI - 6075 AU - Philbrick CT AU - Novelo A AU - Irgang BE AD - Western Connecticut State Univ, Dept Biol & Environm Sci, Danbury, CT 06810, USAUniv Fed Rio Grande Sul, Dept Bot, Inst Biol, Mexico City 04510, DF, MexicoUniv Fed Rio Grande Sul, Dept Bot, BR-91570950 Porto Alegre, RS, BrazilPhilbrick, CT, Western Connecticut State Univ, Dept Biol & Environm Sci, Danbury, CT 06810 USA TI - Two new genera of Podostemaceae from the state of Minas Gerais, Brazil AB - Two new monotypic genera of Podostemaceae are illustrated and described: Cipoia (C. inserta) and Diamantina (D. lombardii). Both are known only from the state of Minas Gerais, Brazil, where they occur attached to rocks in the swift currents of river-rapids and waterfalls. Diamantina is the only genus of Podostemaceae that produces pollen in tetrads. Diamantina lombardii is distinguished from all other New World members of the family by its digitate leaves and prominent gynophore. Cipoia inserta is distinguished from other New World species with dyad pollen by a single stamen per flower and by the ovary and mature capsule remaining enclosed within the ruptured spathella during and after anthesis; only the stigmas and stamens project from the spathella MH - Brazil MH - USA MH - Mexico|Distrito Federal PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 5 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000189310000010 L2 - RBCL SEQUENCE DATA; RIVER-WEEDS; MORPHOLOGY SO - Systematic Botany 2004 ;29(1):109-117 12020 UI - 6515 AU - Philippov VN AU - Kir'yanov AV AU - Unger S AD - Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, EnglandCtr Invest & Opt, Leon 37150, MexicoRussian Acad Sci, Gen Phys Inst, Moscow, RussiaInst Phys High Technol, D-07745 Jena, GermanyPhilippov, VN, Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England TI - Advanced configuration of erbium fiber passively Q-switched laser with Co2+: ZnSe saturable absorber AB - An advanced design of a diode-pumped passively Q-switched erbium fiber laser with a Co2+:ZnSe crystal as a saturable absorber is reported. The laser giant-pulse operation is obtained with threshold of 8.3 mW, repetition rate of pulses of 235 kHz, and pulse energy, peak power, and duration of 15 nJ, 43 mW, and 350 ns, respectively. The self-mode-locking effect in the passively Q-switched fiber laser has been observed experimentally for the first time MH - United Kingdom MH - Germany MH - Mexico|Guanajuato MH - Russia PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 16 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000187885800019 L2 - cobalt;erbium;optical fiber lasers;optical fiber materials;optical pumping;pulsed lasers;semiconductor materials;switches;OPTIMIZATION SO - Ieee Photonics Technology Letters 2004 ;16(1):57-59 12021 UI - 6033 AU - Philpott SM AU - Maldonado J AU - Vandermeer J AU - Perfecto I AD - Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109, USAECOSUR, Tapachula 30700, Chiapas, MexicoUniv Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109, USAPhilpott, SM, Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA TI - Taking trophic cascades up a level: behaviorally-modified effects of phorid flies on ants and ant prey in coffee agroecosystems AB - Trophic cascades exist in numerous terrestrial systems, including many systems with ants as the top predator. Many studies show how behavioral modifications of herbivores are especially important in mediating species interactions and trophic cascades. Although most studies of trophic cascades focus on predator-herbivore-plant links, the trophic cascades concept could be applied to almost any level of trophic interactions. Especially considering the importance of parasites we consider here the interactions between the parasitic phorid fly, Pseudacteon sp. (Diptera: Phoridae), its ant host, Azteca instabilis (F. Smith) (Hymenoptera: Formicidae), and the herbivore, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in the coffee agroecosystem. We investigated the effects of phorid flies on ant behavior by monitoring ant recruitment to tuna baits over a 30-min period in the presence or absence of phorid flies. To study the indirect effects of phorids on larvae, we placed baits on coffee plants to elevate ant foraging levels to levels near to ant nests, placed larvae near baits, and recorded the effects of ants on larvae either in the presence or absence of phorid flies. We found that phorid fly presence significantly reduced ant ability to recruit to baits through behavioral modifications and also significantly lessened ant ability to attack, carry away, or force herbivores off plants. We conclude there is a behaviorally-modified species-level trophic cascade in the coffee agroecosystem, with potentially important effects in ant and herbivore communities as well as for coffee production MH - Mexico|Chiapas MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 6 U4 - Ecology U5 - J;Article AV - English IS - 0030-1299 UR - ISI:000220087600015 L2 - DOLICHODERUS-THORACICUS HYMENOPTERA; BIOLOGICAL-CONTROL; SHADE COFFEE; COMPETITIVE INTERACTIONS; ECOLOGICAL INTERACTIONS; SOLENOPSIS-GEMINATA; FORAGING ACTIVITY; BIRD POPULATIONS; HOST-SPECIFICITY; CONTROL AGENTS SO - Oikos 2004 ;105(1):141-147 12022 UI - 5159 AU - Pichardo B AU - Martos M AU - Moreno E AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Astron, Madison, WI 53706, USAPichardo, B, Univ Nacl Autonoma Mexico, Inst Astron, Apdo Postal 70-264, Mexico City 04510, DF, Mexico TI - Models for the gravitational field of the Galactic bar: An application to stellar orbits in the galactic plane and orbits of some globular clusters AB - We built three models for the gravitational field of the Galactic bar. These models are an inhomogeneous ellipsoid, an inhomogeneous prolate spheroid, and a superposition of four inhomogeneous ellipsoids. Among the three models, the superposition provides our best approximation to the observed boxy mass distribution of the Galactic bar. Adding the bar component to an axisymmetric Galactic model, we have calculated stellar midplane orbits and orbits of some globular clusters with known kinematical data. For all models we find a secular dispersion effect on the orbital energy and angular momentum, as measured in the Galactic inertial frame. This effect might be relevant to explain the orbital prograde-retrograde distribution of globular clusters. For the stellar kinematics, we study the connection between the sense of orbital motion in the midplane and the onset of chaos in the presence of the bar. In the inner region of the bar, chaos is induced by an axisymmetric central component ( bulge), and it arises in orbits that change its orbital sense from prograde to retrograde and vice versa as seen from an inertial reference frame. Outside the bar region, chaos appears only in prograde orbits. Our results concerning such a connection are consistent and extend those obtained for midplane orbits in the presence of only a spiral pattern in the axisymmetric Galactic model MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000222252900015 L2 - galaxies : kinematics and dynamics;Galaxy : structure;globular clusters : general;stellar dynamics;LARGE-SCALE MORPHOLOGY; MILKY-WAY; PATTERN SPEED; GAS-DYNAMICS; TIDAL RADII; SPIRAL GALAXIES; INNER-GALAXY; BULGE; KINEMATICS; MASS SO - Astrophysical Journal 2004 ;609(1):144-165 12023 UI - 6307 AU - Pimentel E AU - Cruces MP AU - Salceda VM AU - de la Rosa ME AU - Levine L AU - Castillo JA AD - Inst Nacl Invest Nucl, Dept Biol, Mexico City 11801, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, MexicoCUNY City Coll, Dept Biol, New York, NY 10031, USAPimentel, E, POB 18-1027, Mexico City 11801, DF, Mexico TI - Ten-year viability study on natural populations of Drosophila sibling species from Laguna Verde, Veracruz, Mexico AB - The generation of electricity in nuclear power plants produces an increase in background radiation that could possibly have some impact on the organisms that live in that area. In order to identify and quantify any such possible effect, the natural populations of two sibling species, D. melanogaster and D. simulans, that live in the immediate vicinity of the first Mexican Nuclear Power Plant were analyzed for a period of 10 years. Collections of flies were made at two sites, one close to and one farther from the power plant, during the pre and operational stages of the reactor, and their egg-to-adult viability was analyzed. The data obtained indicate that in both sites, the egg-to-adult viability was generally higher in D. melanogaster than in D. simulans. Further, a relationship was found between egg-to-adult viability and the season of the year (warm-wet or cool-dry season). Some differences were found between the two sites. It may be concluded that there is no negative impact on the Drosophila populations studied MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0090-4341 UR - ISI:000188848000008 L2 - NUCLEAR-POWER PLANTS; RADIORESISTANCE SO - Archives of Environmental Contamination and Toxicology 2004 ;46(2):203-207 12024 UI - 4933 AU - Pimienta-Barrios E AU - Pimienta-Barrios E AU - Nobel PS AD - Univ Guadalajara, Ctr Univ Ciancias Biol & Agropecuarias, Zapopan, Jalisco, MexicoUniv Calif Los Angeles, Dept Organism Biol Ecol & Evolut, Los Angeles, CA 90095, USAPimienta-Barrios, E, Cerrada Maestranza 1098,Residencial Guadalupe Jar, Zapopan 45030, Jalisco, Mexico TI - Ecophysiology of the pitayo de Queretaro (Stenocereus queretaroensis) AB - Pitayos (Stenocereus spp.) are columnar cacti native to subtropical regions of Mexico that produce edible fruits. Vegetative and reproductive growth for S. qureretaroensis occurs in the dry season but not simultaneously. Most daily net CO2 uptake by S. queretaroensis occurs at night, with the highest values during the late autumn and early winter dry season. Its fine roots are colonized by arbuscular mycorrhizal fungi that enhance stem and fruit growth, apparently due to better P nutrition. The seeds are small, and germinate in response to light. The fruits of S. queretaroensis are valuable resources to wild animals, and can help sequester atmospheric carbon during the dry season. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Jalisco MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000222718000001 L2 - cactus;carbohydrates;mycorrhizae;phenology;photosynthesis;reproductive growth;vegetative growth;CRASSULACEAN ACID METABOLISM; NET CO2 UPTAKE; REPRODUCTIVE CHARACTERISTICS; PLANTS; GROWTH; PHOTOSYNTHESIS; TEMPERATURE; IRRIGATION; CACTACEAE; RESPONSES SO - Journal of Arid Environments 2004 ;59(1):1-17 12025 UI - 5376 AU - Pimienta V AU - Lavabre D AU - Buhse T AU - Micheau JC AD - Univ Toulouse 3, CNRS, UMR 5623, Lab IMRCP, F-31062 Toulouse, FranceUniv Autonoma Estado Morelos, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoPimienta, V, Univ Toulouse 3, CNRS, UMR 5623, Lab IMRCP, 118,Route Narbonne, F-31062 Toulouse, France TI - Correlation between electric potential and interfacial tension oscillations in a water-oil-water system AB - Oscillations of the electric potential and of the interfacial tension were simultaneously recorded in a water-oil-water system (cetyltrimethylammonium bromide (CTAB) in water/picric acid in dichloromethane/water). Both types of oscillations were perfectly correlated in time and shape. In each oscillatory cycle, the fast jumps in the electric potential are related to a rapid adsorption of the surfactant at the interface while the slow motion relaxations correspond to the liberation of the interface from the surfactant by the formation of hydrophobic cetyltrimethylammonium picrate ion pairs that diffuse into the CH2Cl2 phase. The fast inflow of CTAB to the interface is probably caused by periodically occurring convective Marangoni instabilities. The transitions to the convective regime are assumed to be controlled by the fractional surfactant coverage of the interface MH - France MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000221700300058 L2 - LIQUID-MEMBRANE SYSTEM; SURFACE-TENSION; MASS-TRANSFER; VOLTAMMETRIC ELUCIDATION; MARANGONI CONVECTION; MOLECULAR BEHAVIOR; CHEMICAL-REACTION; SELF-OSCILLATION; INSTABILITY; ACID SO - Journal of Physical Chemistry B 2004 ;108(22):7331-7336 12026 UI - 4356 AU - Pincik E AU - Kobayashi H AU - Takahashi M AU - Fujiwara N AU - Brunner R AU - Gleskova H AU - Jergel M AU - Mullerova J AU - Kucera M AU - Falcony C AU - Ortega L AU - Rusnak J AU - Mikula M AU - Zahoran M AU - Jurani R AU - Kral M AD - Slovak Acad Sci, Inst Phys, Bratislava 84511, SlovakiaOsaka Univ, Inst Sci & Ind Res, Osaka 5670047, JapanPrinceton Univ, Dept Elect Engn, Princeton, NJ 08544, USAUniv Zilina, Dept Engn Fundamentals, Fac Elect Engn, SK-031001 Liptovsky Mikulas, SlovakiaSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaCINVESTAV, Dept Fis, IPN, Mexico City 07300, DF, MexicoCNRS, Cristallog Lab, F-38042 Grenoble 09, FranceSUT, Dept Graph Arts Technol & Appl Photochem, Bratislava, SlovakiaComenius Univ, Dept Plasma Phys, Fac Math Phys & Informat, Bratislava, SlovakiaPincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, Bratislava 84511, Slovakia TI - Photoluminescence, structural and electrical properties of passivated a-Si : H based thin films and corresponding solar cells AB - This paper deals with the photoluminescence, structural and electrical properties of chemically passivated a-Si:H based thin films and corresponding thin film solar cells. The structures were chemically passivated in three types of KCN and HCN solutions containing MeOH and/or with water. The photoluminescence measurements were performed at 6 K using Ar laser and lock-in signal recording device containing Ge and Si photodetectors. Optically determined band gap related photoluminescence signals were observed between 1.1 and 1.7 eV. The electrical properties were measured by a high-sensitive charge version of deep level transient spectroscopy (Q-DLTS). The evolution of three basic groups of defects was observed. The structural studies were realized by the standard X-ray diffraction analysis. The cyanide treatment improved significantly the electrical characteristics of both corresponding MOS structures and solar cells due to the passivation of some parts of the dangling bonds by CN group. Particularly, the passivation of the defects at interfaces in MOS or solar cell multilayer structures was achieved which is of primary practical importance. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Japan MH - Mexico|Distrito Federal MH - Slovakia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000224035100013 L2 - amorphous silicon;thin films;photoluminescence;solar cells;HYDROGENATED AMORPHOUS-SILICON; DEFECT-POOL MODEL; MICROCRYSTALLINE SILICON; TRANSITION; STATES SO - Applied Surface Science 2004 ;235(3):351-363 12027 UI - 5801 AU - Pincik E AU - Jergel M AU - Mullerova J AU - Falcony C AU - Ortega L AU - Buzynin AN AU - Lomonova E AU - Brunner R AU - Chromik S AU - Hartmanova M AD - Slovak Acad Sci, Inst Phys, SK-84228 Bratislava, SlovakiaIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoMil Acad, Fac Logist, Dept Phys, SK-03101 Liptovsky Mikulas, SlovakiaCNRS, Lab Cristallog, F-38042 Grenoble 09, FranceRussian Acad Sci, Inst Gen Phys, Moscow, RussiaSlovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, SlovakiaPincik, E, Slovak Acad Sci, Inst Phys, Dubravska Cesta 9, SK-84228 Bratislava, Slovakia TI - On structural properties of Si/Zr(Y)O-2 and Zr(Y)O-2/Si systems AB - The paper deals with the formation of polycrystalline structure of deposited YSZ and Si films on Si and YSZ crystals, respectively, depending on the substrate surface orientation and with the evolution of the YSZ/Si interface properties at the initial stage of the plasma anodization. The X-ray measurements confirmed that YSZ film deposited on Si is amorphous or polycrystal line. A well developed face centered cubic (fcc) phase with lattice parameter of 0.509 nm is typical for the best YSZ layers, four intense 111, 200, 220 and 311 diffractions being usually detected. The polycrystalline structure of Si-on-YSZ layers was affected by the orientation of YSZ substrate surface, namely (100) or (111). The surface of crystalline silicon at the interface with deposited YSZ layer consisted of large polycrystal line blocks, their size being reduced by one order of magnitude after the plasma anodization. The YSZ/Si interface electrical properties were changed remarkably as found by DLTS which revealed a continuous spectrum of interface states originating due to the anodization. It is attributed to the formation of a very thin silicon oxide interlayer between the YSZ layer and Si crystal. The other electrical and optical properties were investigated by C-V, capacitance-frequency, deep level transient spectroscopy and reflectance spectroscopy MH - France MH - Mexico|Distrito Federal MH - Russia MH - Slovakia PB - BRATISLAVA: SLOVAK ACAD SCIENCES INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0323-0465 UR - ISI:000220785900007 L2 - PLASMA ANODIZATION; THIN-FILMS; OPTICAL-CONSTANTS; TEMPERATURE; SILICON; KINETICS; SPECTRA; GROWTH SO - Acta Physica Slovaca 2004 ;54(2):147-161 12028 UI - 5704 AU - Pineda E AU - Halffter G AD - Inst Ecol AC, Dept Ecol & Comportamiento Anim, Xalapa 91000, Veracruz, MexicoPineda, E, Univ E Anglia, 6 Suffolk Walk, Norwich NR4 7TU, Norfolk, England TI - Species diversity and habitat fragmentation: frogs in a tropical montane landscape in Mexico AB - We evaluate the alpha (within patch species richness), beta (spatial turnover among patches) and gamma (landscape) diversity of frogs in a tropical montane cloud forest (TMCF) in central Veracruz, Mexico in order to assess (1) the influence of forest fragmentation on frog assemblages, (2) the importance to diversity of the various elements of the landscape matrix, including the shaded coffee plantations and cattle pastures that surround TMCF and (3) to identify the frog guilds most affected by habitat transformation. We sampled ten sites between May 1998 and November 2000: five TMCF fragments and five anthropogenic habitats. For the entire landscape, we registered 21 species belonging to six families. 100% of these were found in the TMCF fragments and 62% in the surrounding mosaic of anthropogenic habitats. Gamma diversity (gamma) is determined to a greater extent by species exchange (beta) than by local species richness (alpha). Elevational variation, the degree of conservation of the vegetation canopy and fragment size appear to determine the species diversity of this landscape. Large species, terrestrial species, those whose eggs develop outside water, and those whose larvae develop in the water seemed to be most affected by habitat transformation. On its own, even the largest and most species-rich cloud forest fragment is not capable of preserving the current anuran diversity. Neither are the shaded coffee plantations that are interspersed among and link the patches of TMCF. However together they form a diverse system of habitats crucial to species conservation in,this landscape. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Veracruz PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0006-3207 UR - ISI:000221018800005 L2 - alpha, beta and gamma diversity;cloud forest;shaded coffee plantation;frog community;Mexico;AMPHIBIAN POPULATIONS; ISLAND BIOGEOGRAPHY; CONSERVATION; FOREST; RICHNESS; BIODIVERSITY; DECLINES; ECOLOGY; COFFEE; PATCH SO - Biological Conservation 2004 ;117(5):499-508 12029 UI - 5017 AU - Pineda M AU - Playan-Ariso A AU - caine-Villarroya MJ AU - Vernet AM AU - Serra-Castanera A AU - Solano A AU - Vilaseca MA AU - Artuch R AU - Lopez-Perez M AU - Briones-Godino MP AU - Andreu A AU - Montoya J AD - Univ Zaragoza, Dept Bioquim & Biol Mol & Celular, E-50013 Zaragoza, SpainCSIC, Inst Bioquim Clin, Barcelona, SpainHosp Sant Joan Deu, Serv Neuropediat, Esplugas de Llobregat, SpainHosp Sant Joan Deu, Serv Neuropediat, Esplugas de Llobregat, SpainHosp Sant Joan Deu, Serv Bioquim, Esplugas de Llobregat, SpainCtr Invest Bioquim & Biol Mol, Barcelona, SpainUniv Autonoma Estado Morelos, Fac Farm, Cuernavaca, Morelos, MexicoMontoya, J, Univ Zaragoza, Dept Bioquim & Biol Mol & Celular, Miguel Servet 177, E-50013 Zaragoza, Spain TI - Familiar chronic progressive external ophthalmoplegia of mitochondrial origin AB - Introduction. The syndrome of chronic progressive external ophthalmoplegia (CPEO) is a mitochondrial disease characterized by ptosis and ophthalmoplegia that has been associated to the presence of large deletion, single or multiple, in the mitochondrial DNA of skeletal muscle. Case report. We report a familiar case of chronic progressive external ophthalmoplegia of maternal inheritance that began at birth, and developed with slow progression but with no multisistemic involvement. Non of the affected individuals had ragged-red fibers in skeletal muscle. Genetic analysis of mitochondrial DNA revealed the presence of a single deletion of 4,977 bp that encompasses the nucleotide positions 8,482 to 13,460, flanked by a direct repeat sequence. Conclusions. The amount of deleted mitochondrial DNA (15%) in this patient's muscle suggests, even if the percentage of the mutation is low, that this deletion is the molecular cause of the phenotypic presentation of this patient. This is one of the few cases described in the literature of CPEO maternally inherited MH - Mexico|Morelos MH - Spain PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000222338400006 L2 - deletion;familiar chronic progressive external ophthalmoplegia;mitochondrial DNA disorders;KEARNS-SAYRE-SYNDROME; DNA; DELETIONS; MYOPATHY; PATIENT SO - Revista de Neurologia 2004 ;38(11):1023-1027 12030 UI - 3605 AU - Pineda S AU - Budia F AU - Schneider MI AU - Gobbi A AU - Vinuela E AU - Valle J AU - Del Estal P AD - Univ Michoacana, Inst Invest Agropecuarias & Forestales, Tarimbaro 58880, Michoacan, MexicoEscuela Tecn Super Ingn Agron, E-28040 Madrid, SpainECOSUR, Tapachula 30700, Chiapas, MexicoPineda, S, Univ Michoacana, Inst Invest Agropecuarias & Forestales, Km 9-5 Carr, Tarimbaro 58880, Michoacan, Mexico TI - Effects of two biorational insecticides, spinosad and methoxyfenozide, on Spodoptera littoralis (Lepidoptera : Noctuidae) under laboratory conditions AB - The toxicity of two biorational insecticides, spinosad (Tracer) and methoxyfenozide (RH-2485), was tested against eggs, larvae, and pupae of the noctuid Spodoptera littoralis (Boisduval). In the first experiment, filter paper circles containing egg masses of two different age classes, young (<24 h old) and old (24-48 h old), were dipped in different concentrations of each insecticide diluted in either water or acetone. No ovicidal activity was recorded when insecticides were diluted in water. In contrast, when insecticides were diluted in acetone, both egg age classes generally showed a concentration-dependent response for both compounds. Mortality of larvae that hatched from both egg age classes was significantly increased, compared, with control larvae, at all concentrations of both insecticides when diluted in water or acetone alike. The prevalence of mortality was similar with each insecticide. in the second experiment, third instars of S. littoralis were fed semisynthetic diet containing different concentrations of both insecticides. According to LC50,, values, no significant differences were observed between spinosad (2.11. mg [AI]/kg diet) and methoxyfenozide (3.98 mg [AT] /kg diet) after 48 h of treatment, based on the overlap of 95% CL. Toxic effects on the mortality of pupae, adult emergence, and the prevalence of deformed adults after topical application on young, pupae also were examined. Only methoxyfenozide caused pupal mortality and deformed adults. Our results suggest that spinosad and methoxyfenozide are potentially potent compounds for control of S. littoralis MH - Mexico|Chiapas MH - Mexico|Michoacan MH - Spain PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000225907800017 L2 - Spodoptera littoralis;spinosad;methoxyfenozide;toxicity;mortality;BEET ARMYWORM LEPIDOPTERA; ECDYSTEROID AGONISTS; ECDYSONE AGONISTS; CORN-BORER; TEBUFENOZIDE; TOXICITY; RH-5992; RH-2485; PUPAE SO - Journal of Economic Entomology 2004 ;97(6):1906-1911 12031 UI - 2805 AU - Pineiro A AU - Brocos P AU - Amigo A AU - Gracia-Fadrique J AD - Univ Santiago de Compostela, Fac Fis, Dept Fis Aplicada, E-15782 Santiago De Compostela, SpainUniv Nacl Autonoma Mexico, Fac Quim, Lab Termofis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Lab Superficies, Mexico City 04510, DF, MexicoAmigo, A, Univ Santiago de Compostela, Fac Fis, Dept Fis Aplicada, E-15782 Santiago De Compostela, Spain TI - The standard Gibbs energy of adsorption from the bulk at the surface of liquid mixtures: reinterpretation of Traube's rule - Analysis of the Delta(ads)G(0) contributions under the Extended Langmuir model AB - In this paper, it is shown that the symmetrically normalized activity coefficient of the solute in the bulk solution, y(B)(b), makes a non-negligible contribution to the standard Gibbs energy of adsorption of solute from the bulk at the surface of binary liquid mixtures, Delta(ads)G(0). With a view to defining this change with practical purposes, we selected the pure solute and a surface pressure pi of 1 mN m(-1) as standard states for the bulk and surface phases, respectively. Besides, we assumed availability of data in the highly dilute region, where the two-dimensional ideal equation of state holds. In this way, Delta(ads)G(0) = -RTln(pi/gamma(B)(b)x(B)). When gamma(B)(b) is taken into account, Traube's rule (that In(pi/x(B))x(B -> 0) increases linearly with chain length in the water + 1-alkanol series) does not imply that Delta(ads)G(0) increases linearly with chain length. On the contrary, together with the fact that in this series 1n(y(B)(b,infinity)) increases with chain length at the same rate as 1n(pi/x(B))(xB -> 0), Traube's rule implies that Delta(ads)G(0) is constant in this series. This can be interpreted in molecular terms as indicating that in highly dilute solutions the hydrocarbon chain of alkanol molecules at the surface does not lie in or on the surface (as is implied by a linear increase in Delta(ads)G(0) with chain length), but resides completely in the gas phase, as is now known to be true. The constancy of Delta(ads)G(0) also explains why water + 1-alkanol systems share the same pi versus gamma(B)(b)x(B) curve except at high surface concentrations, where the degree of discrepancy is in any case limited by the small differences in surface tension among the pure alkanols. We conclude by using the "Extended Langmuir" model of surface behaviour to Split Delta(ads)G(0) into five distinct physically meaningful contributions. (c) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000227636500014 L2 - surface thermodynamics;surface tension;chemical potential;Gibbs energy;activity coefficient;adsorption isotherms;PLUS N-ALKANES; FREQUENCY VIBRATIONAL SPECTROSCOPY; REFRACTIVE-INDEXES; AIR INTERFACE; 298.15 K; ACTIVITY-COEFFICIENTS; INFINITE DILUTION; EXCESS-ENTHALPIES; AQUEOUS-SOLUTIONS; HEAT-CAPACITIES SO - Fluid Phase Equilibria 2004 ;225(1-2):115-123 12032 UI - 4099 AU - Pino P AU - Walter T AU - Oyarzun M AU - Villegas R AU - Romieu I AD - Univ Chile, Escuela Salud Publ, Fac Med, Santiago, ChileUniv Chile, Inst Nutr & Tecnol Alimentos, Santiago 11, ChileInst Nacl Salud Publ, Mexico City, DF, MexicoPino, P, Univ Chile, Escuela Salud Publ, Fac Med, Av Independencia 939, Santiago, Chile TI - Fine particulate matter and wheezing illnesses in the first year of life AB - Background: Recent evidence implicates fine particulate matter (PM2.5), principally from vehicular exhaust, as a major cause of increased mortality and morbidity. However, there are limited data on the impact of PM2.5 on infant respiratory illnesses. Methods: We conducted a cohort study of 504 infants recruited at 4 months of age from primary health care units in southeastern Santiago, Chile. Project physicians followed infants through the first year of life via monthly check-ups and by appointments on demand. We obtained data for fine particulate matter, sulfur dioxide (SO2), and nitrogen dioxide (NO2) from the governmental monitoring network. Results: The most frequent diagnosis during follow-up was wheezing bronchitis, occurring 19.5 times per 100 infants per month. After adjusting for sex, socioeconomic level, family history of asthma, minimum temperature, and number of older siblings, we found that an increase of 10 mug/m(3) of PM2.5 24-hour average was related to a 5% increase (95% confidence interval 0-9%) in the risk for wheezing bronchitis (1-day lag). This association was present for different lags, with a maximum observed for a 9-day lag (9%; 6-12%). No consistent association was detected with NO2 or SO2 ambient levels. Lower socioeconomic status and having older siblings were also associated with the risk of wheezing bronchitis. The association of PM2.5 and wheezing bronchitis was stronger among infants with a family history of asthma than among infants without. Conclusions: Air pollution in the form of fine particulates, mostly from vehicular exhaust, may adversely affect infants' respiratory health with potential for chronic effects later in life MH - Chile MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 13 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1044-3983 UR - ISI:000224697200008 L2 - DIESEL EXHAUST PARTICLES; AIR-POLLUTION; RESPIRATORY-INFECTIONS; EXPOSURE; CHILDREN; CHILE; CHILDHOOD; SANTIAGO; PATTERN; INDOOR SO - Epidemiology 2004 ;15(6):702-708 12033 UI - 3312 AU - Pinos H AU - Collado P AU - Salas M AU - Guillamon A AU - Perez-Torrero E AD - UNED, Dept Psicobiol, Madrid 28040, SpainUNAM, Dept Dev Neurobiol & Neurophysiol, Juriquilla, Queretaro, MexicoUVM, Dept Hlth Sci, Juriquilla, Queretaro, Mexico TI - Effects of undernutrition on the locus coeruleus in young and adult rats MH - Mexico|Queretaro MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Behavioral Sciences;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0018-506X UR - ISI:000222517100183 SO - Hormones and Behavior 2004 ;46(1):125-125 12034 UI - 3873 AU - Pinos H AU - Collado P AU - Salas M AU - Perez-Torrero E AD - UNED, Dept Psicobiol, Madrid, SpainUNAM, Desarrollo & Neurofisiol Inst Neurobiol, Dept Neurobiol, Juriquilla, Queretaro, MexicoUVM, Dept Ciencias Salud, Juriquilla, Queretaro, MexicoPinos, H, UNED, Dept Psicobiol, Juan Rosal 10,POB 60-148, Madrid, Spain TI - Undernutrition and food rehabilitation effects on the locus coeruleus in the rat AB - Perinatal nutrition plays a fundamental role on the morphological organization and function of a number of brain stem structures. Because little is known of the effects of perinatal undernutrition upon sexually dimorphic structures underlying reproductive behavior, the locus coeruleus morphology of 60-day-old male and female Wistar rats was analyzed. Perinatal food deprivation until weaning significantly decreased the volume and neuronal number of locus coerulus in male and female rats, while nutritional rehabilitation ameliorated these alterations in males but not in females. Data suggest that perinatal undernutrition interferes with the neuroendocrine mechanisms underlying the establishment of sex differences of the locus coeruleus MH - Mexico|Queretaro MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000225140600010 L2 - food rehabilitation;locus coeruleus;perinatal undernutrition;rat;sex differences;OLFACTORY-BULB; FEMALE RATS; BRAIN; MALNUTRITION; DEPRIVATION; NUCLEUS; NUMBER; CELLS; LIFE SO - Neuroreport 2004 ;15(9):1417-1420 12035 UI - 4378 AU - Piwnica D AU - Touraine P AU - Struman I AU - Tabruyn S AU - Bolbach G AU - Clapp C AU - Martial JA AU - Kelly PA AU - Goffin V AD - Fac Med Necker Enfants Malad, INSERM, U584, F-75730 Paris 15, FranceUniv Liege, Lab Mol Biol & Genet Engn, B-4000 Sart Tilman Par Liege, BelgiumUniv Paris 06, Lab Chim Struct Organ & Biol, F-75252 Paris 05, FranceNatl Autonomous Univ Mexico, Inst Neurobiol, Mexico City 76230, DF, MexicoGoffin, V, Fac Med Necker Enfants Malad, INSERM, U584, 156 Rue Vaugirard, F-75730 Paris 15, France TI - Cathepsin D processes human prolactin into multiple 16K-like N-terminal fragments: Study of their antiangiogenic properties and physiological relevance AB - 16K prolactin (PRL) is the name given to the 16-kDa N-terminal fragment obtained by proteolysis of rat PRL by tissue extracts or cell lysates, in which cathepsin D was identified as the candidate protease. Based on its antiangiogenic activity, 16K PRL is potentially a physiological inhibitor of tumor growth. Full-length human PRL ( hPRL) was reported to be resistant to cathepsin D, suggesting that antiangiogenic 16K PRL may be physiologically irrelevant in humans. In this study, we show that hPRL can be cleaved by cathepsin D or mammary cell extracts under the same conditions as described earlier for rat PRL, although with lower efficiency. In contrast to the rat hormone, hPRL proteolysis generates three 16K-like fragments, which were identified by N-terminal sequencing and mass spectrometry as corresponding to amino acids 1 - 132 ( 15 kDa), 1 - 147 (16.5 kDa), and 1 - 150 ( 17 kDa). Biochemical and mutagenetic studies showed that the species-specific digestion pattern is due to subtle differences in primary and tertiary structures of rat and human hormones. The antiangiogenic activity of N-terminal hPRL fragments was assessed by the inhibition of growth factor-induced thymidine uptake and MAPK activation in bovine umbilical endothelial cells. Finally, an N-terminal hPRL fragment comigrating with the proteolytic 17-kDa fragment was identified in human pituitary adenomas, suggesting that the physiological relevance of antiangiogenic N-terminal hPRL fragments needs to be reevaluated in humans MH - Belgium MH - France MH - Mexico|Distrito Federal PB - CHEVY CHASE: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 15 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0888-8809 UR - ISI:000224025200014 L2 - CAPILLARY ENDOTHELIAL-CELLS; RAT PROLACTIN; GROWTH-HORMONE; BIOLOGICAL-PROPERTIES; SIGNALING PATHWAYS; TUMOR ANGIOGENESIS; CLEAVED PROLACTIN; RECEPTOR-BINDING; CANCER-CELLS; 16K FORMS SO - Molecular Endocrinology 2004 ;18(10):2522-2542 12036 UI - 3797 AU - Pizio O AU - Patrykiejew A AU - Sokolowski S AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMarie Curie Sklodowska Univ, Fac Chem, Dept Modelling Physicochem Proc, PL-20031 Lublin, PolandPizio, O, Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Phase behavior of ionic fluids in slitlike pores: A density functional approach for the restricted primitive model AB - We present a density functional theory of nonuniform ionic fluids. This theory is based on the application of the electrostatic contribution to the free energy functional arising from mean spherical approximation for a bulk restricted primitive model and from the energy route bulk equation of state. In order to employ this functional we define a reference fluid and additional averaged densities, according to the approach introduced by Gillespie, Nonner and Eisenberg [J. Phys.: Condens. Matter 14, 12129 (2002)]. In the case of bulk systems the proposed theory reduces to the mean spherical approximation equation of state, arising from the energy route and thus it predicts the first-order phase transition. We use this theory to investigate the effects of confinement on the liquid-vapor equilibria. Two cases are considered, namely an electrolyte confined to the pore with uncharged walls and with charged walls. The dependence of the capillary evaporation diagrams on the pore width and on the electrostatic potential is determined.(C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 18 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000225440200044 L2 - LIQUID-VAPOR INTERFACE; MEAN SPHERICAL APPROXIMATION; FUNDAMENTAL-MEASURE-THEORY; ELECTRICAL DOUBLE-LAYERS; CHARGED HARD-SPHERES; FREE-ENERGY MODEL; MONTE-CARLO; ELECTROLYTES; CRITICALITY; COEXISTENCE SO - Journal of Chemical Physics 2004 ;121(23):11957-11964 12037 UI - 4987 AU - Planat M AU - Rosu H AD - CNRS, Lab Phys & Metrol Oscillateurs, F-25044 Besancon, FrancePotosinian Inst Sci & Technol Res, San Luis Potosi, MexicoPlanat, M, CNRS, Lab Phys & Metrol Oscillateurs, 32 Ave Observ, F-25044 Besancon, France TI - The hyperbolic, the arithmetic and the quantum phase AB - We develop a new approach to the quantum phase in a Hilbert space of finite dimension which is based on the relation between the physical concept of phase locking and mathematical concepts such as cyclotomy and the Ramanujan sums. As a result, the phase variability looks quite similar to its classical counterpart, having peaks at dimensions equal to a power of a prime number. Squeezing of the phase noise is allowed for specific quantum states. The concept of phase entanglement for Kloosterman pairs of phase-locked states is introduced MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1464-4266 UR - ISI:000222591700019 L2 - finite quantum mechanics;quantum phase locking;1/f noise;number theory SO - Journal of Optics B-Quantum and Semiclassical Optics 2004 ;6(6):S583-S590 12038 UI - 4627 AU - Plionis M AU - Basilakos S AU - Tovmassian HM AD - Natl Observ Athens, Athens 15236, GreeceINAOE, Puebla 72000, MexicoPlionis, M, Natl Observ Athens, I Metaxa & B Pavlou, Athens 15236, Greece TI - The shape of poor groups of galaxies AB - We estimate the distribution of intrinsic shapes of UZC-SSRS2 groups of galaxies from the distribution of their apparent shapes. We measure the projected group axial ratio using the moments of their discrete galaxy distribution. Then, using the non-parametric kernel method to estimate the smooth apparent axial ratio distribution, we numerically invert a set of integral equations to recover the corresponding intrinsic distribution under the assumption that groups are either oblate or prolate spheroids. We find that the prolate spheroidal model fits very well the UZC-SSRS2 group distribution with a true mean axial ratio similar or equal to 0.3 and sigma (beta) similar or equal to 0.15. This shows that groups of galaxies are significantly more elongated, both on the plane of the sky and in three dimensions, than clusters of galaxies. The poorest groups that we consider, those with four members, are even more elongated than the overall population with 85 per cent of the groups having beta less than or similar to 0.4 MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000223290600023 L2 - galaxies : general;galaxies : statistics;LARGE-SCALE STRUCTURE; CFA REDSHIFT SURVEY; INTRINSIC SHAPES; COMPACT-GROUPS; CLUSTERS; SUPERCLUSTERS; ELLIPTICITY; MORPHOLOGY; UNIVERSE; CATALOG SO - Monthly Notices of the Royal Astronomical Society 2004 ;352(4):1323-1328 12039 UI - 5796 AU - Plionis M AU - Tovmassian HM AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Observ Athens I Metaxu & B Pavlou, Inst Astron & Astrophys, Athens 15236, GreecePlionis, M, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla 72000, Mexico TI - On the L-X-sigma(v) relation of groups of galaxies AB - We analyse the L-x-sigma(v) relation for the new Mulchaey et al. group Atlas. We find that once we take into account the possible statistical bias introduced by the cutoff in luminosity, we recover a relation that is consistent with that of clusters, i.e., L-x proportional to sigma(4.1). The larger scatter of this relation for groups of galaxies could be attributed to an orientation effect, due to which the radial velocity dispersion of groups oriented close to orthogonal to the line of sight, would be underestimated. This effect could also contribute to flattening the slope of the group L-x - sigma(v) relation MH - Greece MH - Mexico|Puebla PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000220783200006 L2 - galaxies : clusters : general;X-rays : galaxies;HICKSON COMPACT-GROUPS; X-RAY LUMINOSITY; LOOSE GROUPS; VELOCITY DISPERSION; POOR GROUPS; CFA SURVEY; CLUSTERS; EMISSION; SHAPES SO - Astronomy & Astrophysics 2004 ;416(2):441-446 12040 UI - 6253 AU - Poater J AU - Garcia-Cruz I AU - Illas F AU - Sola M AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Girona, Inst Quim Computac, Girona 17071, Catalonia, SpainUniv Girona, Dept Quim, Girona 17071, Catalonia, SpainUniv Barcelona, Dept Quim Fis, E-08028 Barcelona, Catalonia, SpainUniv Barcelona, Ctr Especial Recerca Quim Teor, E-08028 Barcelona, Catalonia, SpainParc Cient Barcelona, Barcelona 08028, Catalonia, SpainIllas, F, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent Lazaro Cardenas 152,Colonia San Bartolo, Mexico City 07730, DF, Mexico TI - Discrepancy between common local aromaticity measures in a series of carbazole derivatives AB - The aromaticity of a series of carbazole derivatives has been analyzed by means of different local aromaticity criteria. In particular, the evaluation of the local aromaticity has been carried out through the use of structurally (HOMA) and magnetically (NICS) based measures, as well as by using a new electronically based indicator of aromaticity, the para-delocalization index (PDI), which is defined as the average of all Bader delocalization indices between para-related carbon atoms in a six-membered ring. For a series of carbazole derivatives, the three measures of local aromaticity vary in a rather narrow range. In addition, a clear divergence is achieved between the three aromaticity criteria. This makes it very difficult to reach a definite classification of the series of compounds with respect to their local aromaticity MH - Mexico|Distrito Federal MH - Spain PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 31 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1463-9076 UR - ISI:000188768900019 L2 - MOLECULAR-ORBITAL METHODS; ELECTRON-PAIRING ANALYSIS; DELOCALIZATION INDEXES; DENSITY; LOCALIZATION; ATOMS; HYDROCARBONS; SYSTEMS; MODEL SO - Physical Chemistry Chemical Physics 2004 ;6(2):314-318 12041 UI - 3801 AU - Pockros PJ AU - Pessoa MG AU - Diago M AU - Martinelli ADC AU - Berg T AU - Germanidis G AU - Lai MY AU - Gomez HR AU - Goeser T AU - Roberts S AU - Sheen IS AU - Hsien T AU - Hinrichsen HM AU - Lee SS AU - Reindollar R AU - Sola R AU - Wilson K AU - Jorga K AU - Graham P AU - Jackson H AD - Scripps Clin, La Jolla, CA, USAInst Infect Emilio Ribas, Sao Paulo, BrazilHosp Gen Valencia, Valencia, SpainUSP, Fac Med Ribeirao Preto, Hosp Clin, Sao Paulo, BrazilUniv Med Charite, Berlin, GermanyPapageorgiou Gen Hosp, Thessaloniki, GreeceNatl Taiwan Univ Hosp, Taipei, TaiwanHosp Civil, Guadalajara, Jalisco, MexicoUniv Cologne, Cologne, GermanyAlfred Hosp, Melbourne, Vic, AustraliaChang Gung Mem Hosp, Taoyuan Hsien, TaiwanUniv Kiel, Kiel, GermanyUniv Kiel, Calgary, AB, CanadaUniv Calgary, Calgary, AB, CanadaCarolinas Ctr Liver Dis, Charlotte, NC, USAHosp Mar, Barcelona, SpainRoche, Welwyn Garden City, Herts, EnglandRoche, Basel, Switzerland TI - Combination of Levovirin (LVV) and peginterferon alfa-2a (40 KD) (Pegasys (R)) fails to generate a virological response comparable to ribavirin (RBV, Copegus (R)) and peginterferon alfa-2a (40KD) in patients with chronic hepatitis MH - Australia MH - Brazil MH - Canada MH - United Kingdom MH - Germany MH - Greece MH - Mexico|Jalisco MH - Spain MH - Switzerland MH - Taiwan MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 8 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000224102100527 SO - Hepatology 2004 ;40(4):391A-391A 12042 UI - 3426 AU - Pogodin P AU - Alkhazov G AU - Atamantchouk AG AU - Balatz MY AU - Bondar NF AU - Cooper PS AU - Dauwe LJ AU - Davidenko GV AU - Dersch U AU - Dolgolenko AG AU - Dzyubenko GB AU - Edelstein R AU - Emediato L AU - Endler AMF AU - Engelfried J AU - Eschrich I AU - Escobar CO AU - Evdokimov AV AU - Filimonov IS AU - Garcia FG AU - Gaspero M AU - Giller I AU - Golovtsov VL AU - Gouffon P AU - Gulmez E AU - Kangling H AU - Iori M AU - Jun SY AU - Kaya M AU - Kilmer J AU - Kim VT AU - Kochenda LM AU - Konorov I AU - Kozhevnikov AP AU - Krivshich AG AU - Kruger H AU - Kubantsev MA AU - Kubarovsky VP AU - Kulyavtsev AI AU - Kuropatkin NP AU - Kurshetsov VF AU - Kushnirenko A AU - Kwan S AU - Lach J AU - Lamberto A AU - Landsberg LG AU - Larin I AU - Leikin EM AU - Yushan L AU - Luksys M AU - Lungov T AU - Maleev VP AU - Chensheng M AU - Mao D AU - Zhenlin M AU - Mathew P AU - Mattson M AU - Matveev V AU - McCliment E AU - Moinester MA AU - Molchanov VV AU - Morelos A AU - Nelson KD AU - Nemitkin AV AU - Neoustroev PV AU - Newsom C AU - Nilov AP AU - Nurushev SB AU - Ocherashvili A AU - de Oliveira E AU - Onel Y AU - Ozel E AU - Ozkurucuklu S AU - Penzo A AU - Petrenko SV AU - Procario M AU - Prutskoi VA AU - Ramberg E AU - Rappazzo GF AU - Razmyslovich BV AU - Rud VI AU - Russ J AU - Schiavon P AU - Simon J AU - Sitnikov AI AU - Skow D AU - Smith VJ AU - Srivastava M AU - Steiner V AU - Stepanov V AU - Stutte L AU - Svoiski M AU - Terentyev NK AU - Thomas GP AU - Uvarov LN AU - Vasiliev AN AU - Vavilov DV AU - Verebryusov VS AU - Victorov VA AU - Vishnyakov VE AU - Vorobyov AA AU - Vorwalter K AU - You J AU - Wenhang Z AU - Shuchen Z AU - Zukanovich-Funchal R AD - Ball State Univ, Muncie, IN 47306, USABogazici Univ, TR-34342 Istanbul, TurkeyCarnegie Mellon Univ, Pittsburgh, PA 15213, USACtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilFermilab Natl Accelerator Lab, Batavia, IL 60510, USAInst High Energy Phys, Protvino, RussiaInst High Energy Phys, Beijing 100039, Peoples R ChinaInst Theoret & Expt Phys, Moscow 117259, RussiaMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyMoscow MV Lomonosov State Univ, Moscow, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaTel Aviv Univ, IL-69978 Ramat Aviv, IsraelUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, BrazilUniv Bristol, Bristol BS8 1TL, Avon, EnglandUniv Iowa, Iowa City, IA 52242, USAUniv Michigan, Flint, MI 48502, USAUniv Roma La Sapienza, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyUniv Sao Paulo, Sao Paulo, BrazilUniv Trieste, Trieste, ItalyIst Nazl Fis Nucl, Trieste, ItalyPogodin, P, Oracle Corp, Legal Dept, Redwood Shores, CA 94065, USA TI - Polarization of Sigma(+) hyperons produced by 800 GeV/c protons on Cu and Be AB - We show that Sigma(+) hyperons produced by 800 GeV/c protons on targets of Be and Cu have significant polarizations (15-20%). These polarizations persist at values of p(t)approximate to2 GeV/c and a wide range of x(F). The polarizations from the Cu target are consistently less than from Be. The average ratio of the Sigma(+) polarization from Cu to that from Be is 0.68+/-0.08 MH - Brazil MH - United Kingdom MH - Germany MH - Israel MH - Italy MH - Mexico|San Luis Potosi MH - Peoples R China MH - Russia MH - Turkey MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000226054700015 L2 - RADIATIVE DECAY; HIGH-ENERGIES; ASYMMETRY; PI(-); MODEL SO - Physical Review D 2004 ;70(11): 12043 UI - 3945 AU - Poinar G AU - Vega FE AU - Castillo A AU - Chavez IE AU - Infante F AD - Oregon State Univ, Dept Zool, Corvallis, OR 97331, USAUSDA ARS, Insect Biocontrol Lab, Beltsville, MD 20705, USAECOSUR, Chiapas 30700, MexicoPoinar, G, Oregon State Univ, Dept Zool, Corvallis, OR 97331, USA TI - Metaparasitylenchus hypothenemi N. sp (Nematoda : Allantonematidae), a parasite of the coffee berry borer, hypothenemus hampei (Curculionidae : Scolytwae) AB - Metaparasitylenchus hypothenemi n. sp. (Nematoda: Allantonematidae) is described from the coffee berry borer, Hypothenemus hampei (Ferrari) (Curculionidae: Scolytinae), in Chiapas, Mexico. This species differs from other members of the genus by its small size, annulated cuticle, lateral fields with 3 ridges, free-living stages with an excretory pore located between the pharyngeal gland orifices, a distinct stylet with basal swellings in free-living females, a postvulval uterine extension, a thin stylet lacking basal swellings in males, 2 separate spicules, a gubernaculum, and a peloderan bursa. Parasitic females are white, with a straight or slightly curved body and are ovoviviparous. Third-stage juveniles emerge from parasitized beetles and molt twice before reaching the adult stage. Because the coffee berry borer is the most important pest of coffee throughout the world and this parasite partially or completely sterilizes female beetles, it is worthy of further investigation as a potential biological control agent MH - Mexico|Chiapas MH - USA PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 0 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000224971400024 SO - Journal of Parasitology 2004 ;90(5):1106-1110 12044 UI - 5571 AU - Poli R AU - Stephens CR AD - Univ Essex, Dept Comp Sci, Colchester CO4 3SQ, Essex, England. UNAM, Inst Ciencias Nucl, Mexico City, DF, Mexico TI - Constrained molecular dynamics as a search and optimization tool AB - In this paper we consider a new class of search and optimization algorithms inspired by molecular dynamics simulations in physics MH - United Kingdom MH - Mexico|Distrito Federal T3 - GENETIC PROGRAMMINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY92V AV - English IS - 0302-9743 UR - ISI:000189497300014 SO - 2004 ;():150-161 12045 UI - 3744 AU - Poltev VI AU - Grokhlina TI AU - Ginzalez E AU - Deriabina A AU - Cruz A AU - Gorb L AU - Leszczynski J AU - Djimant LN AU - Veselkov A AD - BUAP, Fac Ciencias Fis Matemat, Puebla 72570, MexicoRussian Acad Sci, Inst Theoret & Expt Biophys, Pushchino 142290, Moscow Region, RussiaRussian Acad Sci, Inst Math Problems Biol, Pushchino 142290, Moscow Region, RussiaJackson State Univ, Dept Chem, Computat Ctr Mol Struct & Interact, Jackson, MS 39217, USASevastopol Natl Tech Univ, Dept Phys & Chem, UA-99053 Sevastopol, UkrainePoltev, VI, BUAP, Fac Ciencias Fis Matemat, Ciudad Univ,San Manuel, Puebla 72570, Mexico TI - The study of three-dimensional structure of caffeine associates using computational and experimental methods AB - To approach understanding molecular mechanisms of biological activity of caffeine (CAF) we performed a study of caffeine selfassociation. Due to lack of sufficiently precise experimental data caffeine molecular structure was predicted at MP2/6-31G(d,p) ab initio level of theory. Local minima of caffeine-caffeine interactions and pathways of transitions between them were studied by molecular mechanics. The deepest local minima correspond to nearly parallel arrangements of molecules (stacking) in both parallel (face-to-back) and anti-parallel (face-to-face) orientations. This arrangement conserves during transitions between minima of the same orientation. The heights of barrier for such transitions vary from 0.6 to 3.1 kcal/mol. Pathways of transitions between minima of different orientation of molecules pass through various arrangements of molecules with inter-plane angles from nearly 0 to 180degrees. As several minima have energy values from -11.1 to -11.8 kcal/mol, one might expect superposition of a few rather different configurations in aqueous solutions. To estimate a contribution of various CAF arrangements into solution structure, from NMR experiments we obtained induced chemical shifts for protons of CAF dimer, and performed calculations of expected values of them for stacking minima. The comparison of these two sets of data allowed to suggest most populated configurations of caffeine dimers. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Russia MH - Ukraine MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000225486900018 L2 - caffeine;ab initio calculations;molecular mechanics;intermolecular interactions;proton chemical shifts;NUCLEIC-ACIDS; H-1-NMR; DOXORUBICIN; MECHANISMS; SIMULATION; BINDING; DRUGS SO - Journal of Molecular Structure-Theochem 2004 ;709(1-3):123-128 12046 UI - 5081 AU - Ponce-de-Leon A AU - Garcia-Garcia MD AU - Garcia-Sancho C AU - Gomez-Perez FJ AU - Valdespino-Gomez JL AU - Olaiz-Fernandez G AU - Rojas R AU - Ferreyra-Reyes L AU - Cano-Arellano B AU - Bobadilla M AU - Small PM AU - Sifuentes-Osornio J AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoStanford Univ, Stanford, CA 94305, USANatl Inst Med Sci & Nutr, Mexico City, DF, MexicoNatl Inst Resp Dis, Mexico City, DF, MexicoGarcia-Garcia, MD, Inst Nacl Salud Publ, Ave Univ 655, Cuernavaca 62508, Morelos, Mexico TI - Tuberculosis and diabetes in southern Mexico AB - OBJECTIVE - To determine the impact of diabetes on the rates of tuberculosis in a region where both diseases are prevalent. RESEARCH DESIGN AND METHODS - Data from a population-based cohort of patients with pulmonary tuberculosis undergoing clinical and mycobacteriologic evaluation (isolation, identification, drug-susceptibility testing, and IS6110-based genotyping and spoligo-typing) were linked to the 2000 National Health Survey (ENSA2000), a national probabilistic, polystage, stratified, cluster household survey of the civilian, noninstitutionalized population of Mexico. RESULTS - From March 1995 to March 2003, 581 patients with Mycobactcrium tuberculosis culture and fingerprint were diagnosed, 29.6% of whom had been diagnosed previously with diabetes by a physician. According to the ENSA2000, the estimated prevalence of diabetes in the Study area, as 5.3% (95% Cl 4.1-6.5). The estimated rates of tuberculosis for the study area were greater for patients with diabetes than for nondiabetic individuals (209.5 vs. 30.7 per 100,000 person-years, P < 0.0001). CONCLUSIONS - In this setting, the rate of tuberculosis was increased 6.8-fold (95% CI 5.7-8.2, P < 0.0001) in patients with diabetes due to increases in both reactivated and recently transmitted infection. Comorbidity with diabetes may increase tuberculosis rates as much as coinfection with human immunodeficiency virus (HIV), with important implications for the allocation of health care resources MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 16 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000222397100010 L2 - MYCOBACTERIUM-TUBERCULOSIS; PULMONARY TUBERCULOSIS; PREVALENCE; MELLITUS; HEALTH SO - Diabetes Care 2004 ;27(7):1584-1590 12047 UI - 5608 AU - Ponce-Ortega JM AU - Rico-Ramirez V AU - Hernandez-Castro S AU - Diwekar UM AD - Inst Technol Celaya, Dept Ingn Quim, Celaya 38010, Gto, MexicoUniv Guanajuato, Guanajuato 36050, Gto, MexicoUniv Illinois, Dept Chem Engn, Chicago, IL 60607, USARico-Ramirez, V, Inst Technol Celaya, Dept Ingn Quim, Ave Tecnol & Garcia Cubas S-N, Celaya 38010, Gto, Mexico TI - Improving convergence of the stochastic decomposition algorithm by using an efficient sampling technique AB - This work focuses on the basic stochastic decomposition (SD) algorithm of Higle and Sen [J.L. Higle, S. Sen, Stochastic Decomposition, Kluwer Academic Publishers, 1996] for two-stage stochastic linear programming problems with complete recourse. The algorithm uses sampling when the random variables are represented by continuous distribution functions. Traditionally, this method has been applied by using Monte Carlo (MC) sampling to generate the samples of the stochastic variables. However, Monte Carlo methods can result in large error bounds and variance. Hence, some other approaches use importance sampling to reduce variance and achieving convergence faster that the method based on the Monte Carlo sampling technique. This work proposes an improvement on this respect. Hence, we propose to replace the use of the Monte Carlo sampling technique or the importance sampling in the SD algorithm by the use of the novel Hammersley sequence sampling (HSS) technique. Recently, such a technique has proved to provide better uniformity properties than other sampling techniques and, as a consequence, the variance and the number of samples required for convergence are reduced. Also, we use a fractal dimension approach to characterize the error of the estimation of the recourse function based on sampling. The computational implementation of the algorithm involves a framework that integrates the GAMS modeling environment, the HSS sampling code (FORTRAN) and a C++ program which generates appropriate LP problems for each SD iteration. The algorithm has been tested with several case studies representing chemical engineering applications and the results are discussed. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000221151100019 L2 - stochastic programming;stochastic decomposition;Hammersley sequence sampling technique SO - Computers & Chemical Engineering 2004 ;28(5):767-773 12048 UI - 2938 AU - Ponce M AU - Arau J AU - Alonso JM AD - CENIDET, Ctr Nacl Invest & Desarrollo Tecnol, Cuernavaca 62130, Morelos, MexicoUniv Oviedo, Area Tecnol Elect, Gijon 33204, SpainPonce, M, CENIDET, Ctr Nacl Invest & Desarrollo Tecnol, Inter Internado Palmira S-N, Cuernavaca 62130, Morelos, Mexico TI - Evaluation of the class E amplifier with two current sources used as a high-power-factor electronic ballast for compact fluorescent lamps AB - In this paper a novel class E amplifier with two current sources used to implement high-power-factor electronic ballast for fluorescent lamps is presented and evaluated. The circuit is based on the class E amplifier with two current sources, one of them was implemented using the main input voltage and the other by means of a bulk capacitor charged from the resonant tank of the class E amplifier. This topology presents a high power factor and low current crest factor and only uses one switch with zero voltage switching. Design guidelines are presented and a 300-kHz electronic ballast for a 32-W compact fluorescent lamp was designed and tested MH - Mexico|Morelos MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0218-1266 UR - ISI:000227461400015 L2 - class E amplifier;electronic ballast;power factor correction SO - Journal of Circuits Systems and Computers 2004 ;13(3):631-649 12049 UI - 2939 AU - Ponce M AU - Lopez A AU - Correa J AU - Arau J AU - Alonso JM AD - CENIDET, Ctr Nacl Invest & Desarrollo Tecnol, Cuernavaca 62050, Morelos, MexicoUniv Oviedo, Area Tecnol Elect, Gijon 33204, SpainPonce, M, CENIDET, Ctr Nacl Invest & Desarrollo Tecnol, Apartado Postal 5-164, Cuernavaca 62050, Morelos, Mexico TI - Electronic ballast for hid lamps with high frequency square waveform to avoid acoustic resonances AB - This paper presents a driver for a HID lamp based on the application of a high frequency current square waveform through the lamp with the goal of avoiding acoustic resonances. The proposed ballast is fed from a 12-V dc input voltage and is intended to be used in systems supplied from nonconventional sources, such as back-up batteries, photovoltaic generators and automotive applications. In order to initiate the discharge in the lamp, a specially-designed igniter supplied from the 12-V dc voltage is used to apply high voltage ignition peaks to the lamp. Experimental results obtained from a laboratory prototype for a 70-W Metal Halide lamp supplied at 30 kHz are also shown to evaluate the possibilities of the proposed topology MH - Mexico|Morelos MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Hardware & Architecture;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0218-1266 UR - ISI:000227461400016 L2 - acoustic resonances;square waveforms;electronic ballast SO - Journal of Circuits Systems and Computers 2004 ;13(3):651-663 12050 UI - 6388 AU - Pons-Estel BA AU - Catoggio LJ AU - Cardiel MH AU - Soriano ER AU - Gentiletti S AU - Villa AR AU - Abadi I AU - Caeiro F AU - Alvarellos A AU - arcon-Segovia D AD - Hosp Escuela Eva Peron, Serv Reumatol, Rosario, ArgentinaServ Clin Med Hosp Italiano, Secc Reumatol, Buenos Aires, DF, ArgentinaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Inmunol & Reumatol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Clin Epidemiol Unit, Mexico City, DF, MexicoHosp Provincial Rosario, Serv Reumatol, Rosario, ArgentinaHop Univ Caracas, Ctr Nacl Enfermedades Reumat, Serv Teumatol, Caracas, VenezuelaHosp Privado, Ctr Med Cordoba, Cordoba, ArgentinaPons-Estel, BA, Ave Huerto 1375,Piso 24, RA-2000 Rosario, Argentina TI - The GLADEL multinational Latin American prospective inception cohort of 1,214 patients with systemic lupus erythematosus - Ethnic and disease heterogeneity among "Hispanics" AB - Clinical and laboratory manifestations and outcome of systemic lupus erythematosus (SLE) may vary in different populations. A prospective multinational inception cohort should prove useful in identifying the influence of ethnicity on the clinical characteristics of SLE. We therefore analyzed clinical, laboratory, and prognostic variables in Latin American SLE patients with disease of recent onset who were entered into a prospective cohort, and compared these variables in the cohort's 3 major ethnic groups. Thirty-four centers from 9 Latin American countries participated by randomly incorporating SLE patients within 2 years of diagnosis into a standardized database. Participating centers were selected for their expertise in diagnosing and managing SLE. We were then able to evaluate prospectively socioeconomic variables, ethnicity, type of medical care, clinical and laboratory features, disease activity, damage, and mortality at each site. A coordinating center controlled the quality of the information submitted. Of the 1,214 SLE patients included in the cohort, 537 were mestizos, 507 were white, and 152 were African-Latin American (ALA) MH - Argentina MH - Mexico|Distrito Federal MH - Venezuela PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 27 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000188374600001 L2 - RHEUMATOLOGY DAMAGE INDEX; 513 DANISH PATIENTS; SINGLE-CENTER; RISK-FACTORS; SOCIOECONOMIC-STATUS; CLINICAL MANIFESTATIONS; CARIBBEAN PATIENTS; PROGNOSTIC VALUE; LUMINA COHORT; MULTI-CENTER SO - Medicine 2004 ;83(1):1-17 12051 UI - 3800 AU - Poo JL AU - Sanchez-Avila F AU - Kershenobich D AU - Samper XG AU - Gongora J AU - Sandoval MG AU - Oest JA AU - Martins EB AU - Uribe M AD - Med Sur Clin Fdn, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHosp Adolfo Lopez Mateos, Mexico City, DF, MexicoSciClone Pharmaceut, San Mateo, CA, USA TI - A pilot trial of thymalfasin (thymosin alpha-1) in combination with peginterferon alpha-2a (PEG-IFN2a) and ribavirin in HCV non-responders: 48-week (end of therapy) results MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000224102100398 SO - Hepatology 2004 ;40(4):336A-336A 12052 UI - 5557 AU - Popp PJ AU - Gao RS AU - Marcy TP AU - Fahey DW AU - Hudson PK AU - Thompson TL AU - Karcher B AU - Ridley BA AU - Weinheimer AJ AU - Knapp DJ AU - Montzka DD AU - Baumgardner D AU - Garrett TJ AU - Weinstock EM AU - Smith JB AU - Sayres DS AU - Pittman JV AU - Dhaniyala S AU - Bui TP AU - Mahoney MJ AD - NOAA, Aeron Lab, Boulder, CO 80303, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO, USADeutsch Zentrum Luft & Raumfahrt Oberpfaffenfofen, Inst Phys Atmosphare, Wessling, GermanyNatl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City, DF, MexicoUniv Utah, Dept Meteorol, Salt Lake City, UT 84112, USAHarvard Univ, Atmospher Res Project, Cambridge, MA, USACALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USACALTECH, Jet Prop Lab, Pasadena, CA, USAPopp, PJ, NOAA, Aeron Lab, 325 Broadway, Boulder, CO 80303, USA TI - Nitric acid uptake on subtropical cirrus cloud particles (vol 109, art no D06302, 2004) MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Meteorology & Atmospheric Sciences U5 - J;Correction AV - English IS - 0148-0227 UR - ISI:000221325000008 SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D8): 12053 UI - 5878 AU - Popp PJ AU - Gao RS AU - Marcy TP AU - Fahey DW AU - Hudson PK AU - Thompson TL AU - Karcher B AU - Ridley BA AU - Weinheimer AJ AU - Knapp DJ AU - Montzka DD AU - Baumgardner D AU - Garrett TJ AU - Weinstock EM AU - Smith JB AU - Sayres DS AU - Pittman JV AU - Dhaniyala S AU - Bui TP AU - Mahoney MJ AD - NOAA, Aeron Lab, Boulder, CO 80305, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNASA, Ames Res Ctr, Moffett Field, CA 94035, USAClarkson Univ, Dept Mech & Aeronaut Engn, Potsdam, NY 13699, USAUniv Utah, Dept Meteorol, Salt Lake City, UT 84112, USADeutsch Zentrum Luft & Raumfahrt, Inst Phys Atmosphare, D-82234 Wessling, GermanyUniv Colorado, NOAA, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USANatl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USAHarvard Univ, Atmospher Res Project, Cambridge, MA 02138, USACALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125, USACALTECH, Jet Prop Lab, Pasadena, CA 91125, USAPopp, PJ, NOAA, Aeron Lab, Boulder, CO 80305, USA TI - Nitric acid uptake on subtropical cirrus cloud particles AB - [1] The redistribution of HNO3 via uptake and sedimentation by cirrus cloud particles is considered an important term in the upper tropospheric budget of reactive nitrogen. Numerous cirrus cloud encounters by the NASA WB-57F high-altitude research aircraft during the Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment (CRYSTAL-FACE) were accompanied by the observation of condensed-phase HNO3 with the NOAA chemical ionization mass spectrometer. The instrument measures HNO3 with two independent channels of detection connected to separate forward and downward facing inlets that allow a determination of the amount of HNO3 condensed on ice particles. Subtropical cirrus clouds, as indicated by the presence of ice particles, were observed coincident with condensed-phase HNO3 at temperatures of 197-224 K and pressures of 122-224 hPa. Maximum levels of condensed-phase HNO3 approached the gas-phase equivalent of 0.8 ppbv. Ice particle surface coverages as high as 1.4 x 10(14) molecules cm(-2) were observed. A dissociative Langmuir adsorption model, when using an empirically derived HNO3 adsorption enthalpy of -11.0 kcal mol(-1), effectively describes the observed molecular coverages to within a factor of 5. The percentage of total HNO3 in the condensed phase ranged from near zero to 100% in the observed cirrus clouds. With volume-weighted mean particle diameters up to 700 mm and particle fall velocities up to 10 m s(-1), some observed clouds have significant potential to redistribute HNO3 in the upper troposphere MH - Germany MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 24 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000220437900006 L2 - cirrus clouds;nitric acid;uptake;ice particles;IN-SITU MEASUREMENTS; HIGH-LEVEL CLOUDS; UPPER TROPOSPHERE; ICE PARTICLES; LOWER STRATOSPHERE; NASA ER-2; WATER-ICE; HNO3; AEROSOL; MODEL SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D6): 12054 UI - 5939 AU - Portilla-De-Buen E AU - Ramos L AU - Leal C AU - Garcia D AU - Rodriguez-Reynoso S AU - Huerta M AU - Intaglietta M AD - IMSS, Ctr Invest Biomed Occidente, Div Surg Res, Guadalajara, Jalisco, MexicoIMSS, Ctr Invest Biomed Occidente, Mutagenesis Lab, Guadalajara, Jalisco, MexicoUniv Colima, Ctr Univ Invest Biomed, Colima, MexicoUniv Calif San Diego, Dept Bioengn, La Jolla, CA 92093, USAPortilla-De-Buen, E, IMSS, Ctr Invest Biomed Occidente, Div Surg Res, Guadalajara, Jalisco, Mexico TI - Activated clotting time and heparin administration in Sprague-Dawley rats and Syrian golden hamsters AB - To determine the activated clotting time (ACT) in rats and hamsters from our colony and to evaluate the response of this parameter to different heparin doses in these species, ACTs were measured using a Medtronic HemoTec ACT measurement system in samples obtained by intracardiac puncture from normal, nonanticoagulated, anesthetized rats and hamsters. Another groups of animals received different intravenous boluses of heparin to determine the dose needed to maintain ACT values > 480 sec for at least 30 min. The ACT (mean +/- SEM) was 48.0 +/- 2.17 sec for the 50 rats sampled and 42.5 +/- 2.35 sec for the 48 hamsters. Rats required a bolus of 1200 IU/ kg intravenous heparin to maintain an ACT > 480 see for 30 min; hamsters required 1000 IU/kg heparin for the same effect. We concluded that compared with humans, rats and hamsters from our colony have short ACTs and low sensitivity to heparin, in terms of the dose needed to reach a target ACT as well as the time required to sustain it. Further the ACT values in these animals showed great variability MH - Mexico|Colima MH - Mexico|Jalisco MH - USA PB - MEMPHIS: AMER ASSOC LABORATORY ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences;Zoology U5 - J;Article AV - English IS - 1060-0558 UR - ISI:000220304300005 L2 - EXTRACORPOREAL MEMBRANE-OXYGENATION; DOSE THROMBIN TIME; CARDIOPULMONARY BYPASS; COAGULATION TIME; PLASMA; BLOOD; ANTICOAGULATION; THERAPY; SURGERY SO - Contemporary Topics in Laboratory Animal Science 2004 ;43(2):21-24 12055 UI - 5106 AU - Posadas MRO AU - Vega-Alvarado L AU - Toni B AD - Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Elect, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City, DF, MexicoVirginia State Univ, Dept Math & Comp Sci, Petersburg, VA, USAPosadas, MRO, Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Elect, Av San Rafael Atlixco 186,Col Vicentina,CP, Mexico City 09340, DF, Mexico TI - A similarity function to evaluate the orthodontic condition in patients with cleft lip and palate AB - The objective of this work is the modeling of a similarity function adapted to the medical environment using the logicat-combinatorial approach of pattern recognition theory, and its application to compare the orthodontic conditions of patients with cleft-primary palate and/or cleft-secondary palate congenital malformations. The variables in domains with no a priori algebraic or topological structure are objects whose similarity or difference is evaluated by comparison criteria functions. The range of these functions is an ordered set normalized into the unit interval, and they are designed to allow differentiation and non-uniform treatment of the object-variables. The analogy between objects is formalized as a similarity function that stresses the relations among the comparison criteria and evaluates the partial descriptions (partial similarity/difference) or total descriptions (total similarity/difference) of the objects. For the orthodontic problem we defined a set of 12 variables featuring the unilateral/bilateral fissures, the conditions of maxilla, premaxilla, mandible and patient's bite. The comparison criteria (logical for malocclusion, fuzzy for maxillary collapse unilateral/anteroposterior and for overbite, and Boolean for protrusive/retrusive premaxilla conditions) were assigned a relevance factor based on the orthodontist accumulated knowledge and experience. The modeling of the similarity function and its effectiveness in comparing orthodontic conditions in patients are illustrated by the study of four clinical cases with different clefts. The results through similarity are close to the expected ones. Moreover evaluated at different moments it allows to assess the effect of treatment in a single patient, hence providing valuable auxiliary criteria for medical decision making as to the patient's rehabilitation. We include the potential extension of the methodology to other medical disciplines such as speech therapy and reconstructive surgery. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 0 U4 - Medicine, Research & Experimental U5 - J;Article AV - English IS - 0306-9877 UR - ISI:000222294200006 SO - Medical Hypotheses 2004 ;63(1):35-41 12056 UI - 3613 AU - Posadas P AU - Morrone JJ AD - Museo Paleontol Egidio Feruglio, Trelew, ArgentinaUNAM, Fac Ciencias, Dept Evolut Biol, Museo Zool, Mexico City 04510, DF, MexicoPosadas, P, Museo Paleontol Egidio Feruglio, Fontana 140,U9100GYO, Trelew, Argentina TI - A new species of Antarctobius Fairmaire from Islas Malvinas (Coleoptera : Curculionidae : Cyclominae) AB - A new species of the genus Antarctobius Fairmaire (1885) from Islas Malvinas (Falkland Islands) is described and illustrated: A. malvinensis Posadas and Morrone n. sp. (type locality: East Falkland, Mt. Usborne). A key to the species of the genus is presented. A cladistic analysis of the species of Antarctobius, based on 25 characters from the external morphology, genitalia, and body vestiture, is undertaken. The resulting cladogram shows the following sequence: ((A. lacunosus (A. hyadesii, A. vulsus) (A. malvinensis (A. yefacel, A. bidentatus (A. rugirostris (A. abditus (A. germaini, A. falklandicus))))))) MH - Argentina MH - Mexico|Distrito Federal PB - STENSTRUP: APOLLO BOOKS RP - NOT IN FILE U3 - TC 2 U4 - Evolutionary Biology;Entomology U5 - J;Article AV - English IS - 1399-560X UR - ISI:000225899600010 SO - Insect Systematics & Evolution 2004 ;35(3):353-359 12057 UI - 4683 AU - Pottiez O AU - Kuzin EA AU - Ibarra-Escamilla B AU - Camas-Anzueto JT AU - Gutierrez-Zainos F AD - Fac Polytech Mons, Serv Electromagnet & Telecommun, B-7000 Mons, BelgiumInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoPottiez, O, Fac Polytech Mons, Serv Electromagnet & Telecommun, Bd Dolez 31, B-7000 Mons, Belgium TI - Easily tunable nonlinear optical loop mirror based on polarization asymmetry AB - The operation of an unconventional, power-symmetric nonlinear optical loop mirror (NOLM) is investigated. Its principle is based on the creation of a polarization asymmetry between the counterpropagating beams, through the use of a quarter-wave plate and highly twisted fiber in the loop. Using a very intuitive approach, we propose a simple although comprehensive description of the NOLM operation. By adjusting the angle of the quarter-wave plate, the interferometer can be tuned continuously from non-power-dependent operation to nonlinear switching, in a very convenient way. Experimental results confirm theoretical predictions. The properties of the proposed NOLM design make it very attractive for various applications, like pedestal suppression and amplitude regularization of optical pulse trains. (C) 2004 Optical Society of America MH - Belgium MH - Mexico|Puebla PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 1094-4087 UR - ISI:000223193100029 L2 - LOW-BIREFRINGENCE; TWISTED FIBER; MODE-LOCKING; LASER; INTERFEROMETER; REFLECTORS; PULSES SO - Optics Express 2004 ;12(16):3878-3887 12058 UI - 4835 AU - Pottiez O AU - Kuzin EA AU - Ibarra-Escamilla B AU - Camas-Anzueto JT AU - Gutierrez-Zainos F AD - Fac Polytech Mons, Serv Electromagnetisme & Telecommun, FNRS, B-7000 Mons, BelgiumInst Nacl Astrofis Opt & Electr, Puebla 72000, MexicoPottiez, O, Fac Polytech Mons, Serv Electromagnetisme & Telecommun, FNRS, Blvd Dolez 31, B-7000 Mons, Belgium TI - Experimental demonstration of NOLM switching based on nonlinear polarisation rotation AB - Nonlinear polarisation rotation is shown experimentally to be an effective process to switch a fibre nonlinear optical loop mirror (NOLM). If interfering beams have different polarisations, no power imbalance is required. Contrary to standard NOLM designs, the proposed architecture combines high contrast with simultaneously low critical power and low insertion loss MH - Belgium MH - Mexico|Puebla PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000222922700034 L2 - OPTICAL LOOP MIRROR; LOW-BIREFRINGENCE; FIBER; PULSES; LASER SO - Electronics Letters 2004 ;40(14):892-894 12059 UI - 6541 AU - Pottiez O AU - Kuzin EA AU - Ibarra-Escamilla B AU - Martinez FM AD - INAOE, Puebla 72000, MexicoFac Polytech Mons, Serv Electromagnetisme & Telecommun, Belgian Fund Sci Res, FNRS, B-7000 Mons, BelgiumPottiez, O, INAOE, LE Erro 1, Puebla 72000, Mexico TI - Easily tuneable nonlinear optical loop mirror including low-birefringence, highly twisted fibre with invariant output polarisation AB - We investigate theoretically the operation of a versatile nonlinear optical loop mirror (NOLM) structure to be used in optical communication systems. The proposed device is a fibre Sagnac interferometer that includes a low-birefringence, highly twisted fibre and a quarter-wave plate retarder in the loop. We study, both analytically and numerically, the evolution of the intensity-dependent NOLM transmission for both output polarisation components, using different models for the NOLM. From this analysis, we propose an easy way to adjust the position of the NOLM maximum transmission, simply by tuning the angle of the retarder. This procedure is particularly useful for amplitude regularisation of an optical signal. We also demonstrate that, if a tuneable optical attenuator is inserted in the loop, the positions of both maximum and minimum transmission can be tuned separately, using a perfectly reproducible procedure. It is therefore possible to optimise the NOLM transmission for both pedestal and amplitude fluctuations removal in ail optical pulse train. For a circular input polarisation, this procedure ensures the highest possible contrast between minimum and maximum transmission, and an output polarisation state that is linear and independent of the input power. Finally, we demonstrate that the transmission characteristic of this NOLM is robust to environmentally induced changes in the fibre birefringence. Thanks to its versatility, robustness and polarisation invariance, this device is thought to be of primary interest for applications such as passive mode locking, pulse compression and pedestal suppression, amplitude regularisation in harmonically mode-locked, rational-harmonically mode-locked or subharmonic synchronous mode-locked lasers, as well as damping of relaxation oscillations. (C) 2003 Elsevier B.V. All rights reserved MH - Belgium MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000187727400018 L2 - Sagnac interferometer;fibre-optic devices;optical communications;SAGNAC INTERFEROMETER; LASER; OPTIMIZATION; SWITCH SO - Optics Communications 2004 ;229(1-6):147-159 12060 UI - 4118 AU - Pottosin I AU - Martinez-Estevez M AU - Dobrovinskaya O AU - Muniz J AU - Schonknecht G AD - Univ Colima, Ctr Univ Invest Biomed, Colima 28047, MexicoCtr Invest Cient Yucatan, Merida 97200, Yucatan, MexicoOklahoma State Univ, Dept Bot, Stillwater, OK 74078, USAPottosin, I, Univ Colima, Ctr Univ Invest Biomed, Colima 28047, Mexico TI - Mechanism of luminal Ca2+ and Mg2+ action on the vacuolar slowly activating channels AB - The non-selective slow vacuolar (SV) channel can dominate tonoplast conductance, making it necessary to tightly control its activity. Applying the patch-clamp technique to vacuoles from sugar beet (Beta vulgaris L.) taproots we studied the effect of divalent cations on the vacuolar side of the SV channel. Our results show that the SV channel has two independent binding sites for vacuolar divalent cations, (i) a less selective one, inside the channel pore, binding to which impedes channel conductance, and (ii) a Ca(2+-)selective one outside the membrane-spanning part of the channel protein, binding to which stabilizes the channel's closed conformations. Vacuolar Ca2+ and Mg2+ almost indiscriminately blocked ion fluxes through the open channel pore, decreasing measured single-channel current amplitudes. This low-affinity block displays marked voltage dependence, characteristic of a 'permeable blocker'. Vacuolar Ca(2+-)with a much higher affinity than Mg(2+-)slows down SV channel activation and shifts the voltage dependence to more (cytosol) positive potentials. A quantitative analysis results in a model that exactly describes the Ca(2+ -)specific effects on the SV channel activation kinetics and voltage gating. According to this model, multiple (approximately three) divalent cations bind with a high affinity at the luminal interface of the membrane to the channel protein, favoring the occupancy of one of the SV channel's closed states (C2). Transition to another closed state (C1) diminishes the effective number of bound cations, probably due to mutual repulsion, and channel opening is accompanied by a decrease of binding affinity. Hence, the open state (O) is destabilized with respect to the two closed states, C1 and C2, in the presence of Ca2+ at the vacuolar side. The specificity for Ca2+ compared to Mg2+ is explained in terms of different binding affinities for these cations. In this study we demonstrate that vacuolar Ca2+ is a crucial regulator to restrict SV channel activity to a physiologically meaningful range, which is less than 0.1% of maximum SV channel activity MH - Mexico|Colima MH - Mexico|Yucatan MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0935 UR - ISI:000224614600015 L2 - beta;calcium;modulation of voltage gating;slow vacuolar channel;vacuole;GUARD-CELL VACUOLES; INDUCED CALCIUM-RELEASE; DEPENDENT ION CHANNELS; PATCH-CLAMP; CATION CHANNEL; PLANT VACUOLES; SUSPENSION CELLS; RADISH VACUOLES; TONOPLAST; TRANSPORT SO - Planta 2004 ;219(6):1057-1070 12061 UI - 4927 AU - Prabhakaran M AU - Gursahani SH AU - Verma CS AU - Garduno-Juarez R AU - Renugopalakrishnan V AD - Florida Int Univ, Coll Engn, Dept Biomed Engn, Bionanotechnol Grp, Miami, FL 33174, USABiodyn Software Inc, Poway, CA 92064, USAYork Univ, Dept Chem, Struct Biol Lab, York YO1 5DD, N Yorkshire, EnglandUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoHarvard Univ, Sch Med, Childrens Hosp, Boston, MA 02215, USARenugopalakrishnan, V, Florida Int Univ, Coll Engn, Dept Biomed Engn, Bionanotechnol Grp, 10555 W Flagler St,Room 2677, Miami, FL 33174 USA TI - Cytochrome c: the effect of temperature and pressure from molecular dynamics simulations AB - Cytochrome c has been extensively investigated due to its role in the process of electron transfer in the mitochondrial system. The effect of temperature and pressure on horse cytochrome c was investigated using normal mode analysis and Molecular Dynamics simulations. The conformational space of the molecule and the anharmonic component of oscillations were obtained further by molecular dynamics simulations for 1.5 ns in solvent environment. The simulated root means square fluctuations, radii of gyration, hydrogen bond arrangements and atomic packing densities reveal that the protein remains compact for the duration of the simulation; high temperature induced partial unfolding at surface regions was observed. The covalent bonding arrangement of the Fe (heme) was investigated during the simulation. These results provide insight into the stability of electron transport by cytochrome c under various pressures and temperatures and provide the regions that could be mutated to enhance the stability and electron transfer properties of the protein. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - USA MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000222727300034 L2 - high pressure;crystal structure;anharmonicity;NORMAL-MODE ANALYSIS; LYSOZYME; MOTIONS SO - Journal of Physics and Chemistry of Solids 2004 ;65(8-9):1615-1622 12062 UI - 4053 AU - Prencipe M AU - Pascale F AU - Zicovich-Wilson CM AU - Saunders VR AU - Orlando R AU - Dovesi R AD - Univ Turin, Dipartimento Sci Mineral & Petrol, I-10125 Turin, ItalyUniv Nancy 1, Fac Sci, Grp Biocristallog,UMR 7036, Lab Cristallog & Modelisat Mat Mineraux & Biol, F-54506 Vandoeuvre Les Nancy, FranceUniv Autonoma Estado Morelos, Dept Fis, Cuernavaca 62210, Morelos, MexicoUniv Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyUniv Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, ItalyPrencipe, M, Univ Turin, Dipartimento Sci Mineral & Petrol, Via Valperga Caluso 35, I-10125 Turin, Italy TI - The vibrational spectrum of calcite (CaCO3): an ab initio quantum-mechanical calculation AB - The vibrational spectrum of calcite (CaCO3) is evaluated at an ab initio periodic quantum-mechanical level by using the CRYSTAL package. A localized basis set of Gaussian-type functions and the B3LYP hybrid Hamiltonian are adopted. The dynamical matrix is obtained by differentiating numerically the analytical first derivatives of the energy. The accuracy with respect to all computational parameters is documented. The calculated frequencies are compared with available IR and RAMAN data (16 and 5 peaks, respectively), the mean absolute error being less than 12 cm(-1) (frequencies range from 100 to 1600 cm(-1)). Overall, the agreement with experiment is very satisfactory, and shows that simulation can produce at a relatively low cost the full spectra of crystalline compounds of mineralogical interest MH - France MH - Italy MH - Mexico|Morelos PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 16 U4 - Materials Science, Multidisciplinary;Mineralogy U5 - J;Article AV - English IS - 0342-1791 UR - ISI:000224753600009 L2 - vibrational spectroscopy;quantum-mechanical calculations;calcite;LOCALIZED WANNIER FUNCTIONS; HARTREE-FOCK GRADIENTS; PERIODIC-SYSTEMS; CRYSTALLINE COMPOUNDS; ELECTRONIC-STRUCTURE; MAGNESITE MGCO3; ARAGONITE; IMPLEMENTATION; FREQUENCIES; PRESSURE SO - Physics and Chemistry of Minerals 2004 ;31(8):559-564 12063 UI - 6403 AU - Pressoir G AU - Berthaud J AD - IRD, Ctr Montpellier, DGPC, UMR, F-34394 Montpellier 5, FranceCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoPressoir, G, IRD, Ctr Montpellier, DGPC, UMR, BP 64501, F-34394 Montpellier 5, France TI - Patterns of population structure in maize landraces from the Central Valleys of Oaxaca in Mexico AB - Assessing the impact of farmer management of maize landraces in the Central Valleys of Oaxaca, Mexico is crucial to an understanding of maize evolution, as it was first domesticated there. In this paper, we report on the impact of traditional farmer management of maize populations in this region in structuring molecular diversity and on the population dynamics of maize landraces. These populations, from a sample of local landraces cultivated by farmers in six villages, show little among-population differentiation (F-st = 0.011). Most surprisingly, there is no isolation by distance and small among-village differentiation (F-st = 0.003). For an outbreeding plant such as maize, one would expect populations to fit Hardy-Weinberg equilibrium, but significant homozygote excess (F-is = 0.13) was found. This homozygote excess shows remarkable interpopulation and interlocus differences. We show that this pattern is related to variation in the mean anthesis-silking interval as well as to the flowering range or heterogeneity in flowering of a given population. A short anthesis-silking interval and high level of heterogeneity in flowering precocity will favor assortative mating. This leads to a locus-dependent population substructure giving an unusual case of Wahlund effect and inbreeding while high levels of seed exchange among farmers prevent population differentiation at both village and regional levels MH - France MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 16 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-067X UR - ISI:000188431700005 L2 - assortative mating;flowering heterogeneity;F-st;inbreeding;maize landraces;population structure;GENETIC DIVERSITY; F-STATISTICS; POLYMORPHISMS; DOMESTICATION; CONSERVATION; SELECTION; DISTANCE; ISOZYME; RATES; LOCI SO - Heredity 2004 ;92(2):88-94 12064 UI - 6404 AU - Pressoir G AU - Berthaud J AD - IRD, Ctr Montpellier, DGPC, UMR, F-34394 Montpellier 5, FranceCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoPressoir, G, IRD, Ctr Montpellier, DGPC, UMR, BP 64501, F-34394 Montpellier 5, France TI - Population structure and strong divergent selection shape phenotypic diversification in maize landraces AB - To conserve the long-term selection potential of maize, it is necessary to investigate past and present evolutionary processes that have shaped quantitative trait variation. Understanding the dynamics of quantitative trait evolution is crucial to future crop breeding. We characterized population differentiation of maize landraces from the State of Oaxaca, Mexico for quantitative traits and molecular markers. Q(st) values were much higher than F-st values obtained for molecular markers. While low values of F-st (0.011 within-village and 0.003 among-villages) suggest that considerable gene flow occurred among the studied populations, high levels of population differentiation for quantitative traits were observed (ie an among-village Q(st) value of 0.535 for kernel weight). Our results suggest that although quantitative traits appear to be under strong divergent selection, a considerable amount of gene flow occurs among populations. Furthermore, we characterized nonproportional changes in the G matrix structure both within and among villages that are consequences of farmer selection. As a consequence of these differences in the G matrix structure, the response to multivariate selection will be different from one population to another. Large changes in the G matrix structure could indicate that farmers select for genes of major and pleiotropic effect. Farmers' decision and selection strategies have a great impact on phenotypic diversification in maize landraces MH - France MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 21 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-067X UR - ISI:000188431700006 L2 - F-st;G matrix;maize landraces;population structure;Q(st);quantitative traits;QUANTITATIVE CHARACTERS; GENETIC VARIANCE; F-STATISTICS; G-MATRIX; CONSERVATION; FREQUENCIES; MEXICO; EVOLUTION SO - Heredity 2004 ;92(2):95-101 12065 UI - 6324 AU - Prieto-Gomez B AU - Benitez MT AU - Vazquez-Alvarez AM AU - Yang PB AU - Vazquez CR AU - Dafny N AD - Univ Texas, Sch Med, Dept Neurobiol & Anat, Houston, TX 77255, USAUniv Nacl Autonoma Mexico, Fac Med, Div Invest, Dept Fisiol, Mexico City 20, DF, MexicoUniv Texas, Grad Sch Biomed Sci, Houston, TX 77225, USADafny, N, Univ Texas, Sch Med, Dept Neurobiol & Anat, POB 20708, Houston, TX 77255 USA TI - Dopaminergic ventral tegmental neurons modulated by methylphenidate AB - Treatment of psychostimulants leads to the development of behavioral sensitization, an augmented behavioral response to drug re-administration. The induction of behavioral sensitization to psychostimulants such as amphetamine and cocaine occurs at the ventral tegmental area's dopaminergic neurons (VTA-DA). Currently, there is limited experimental data about the physiological properties of methylphenidate (MPD) on VTA-DA neurons. Behavioral and electrophysiological experiments using male rats were performed before and after MPD treatment. The behavioral experiment included dose-response (0.6, 2.5, and 10.0 mg/kg MPD) study to select the most effective dose for the electrophysiological study. Methylphenidate increased locomotion in typical dose response characteristics. Based on this experiment, the 10.0 mg/kg MPD was used in two types of electrophysiological recordings: 1) intracellular recording of neuronal activity performed on horizontal 275-300 mum brain slices and 2) whole-cell patch clamping before and after electrical stimulation to study post-synaptic currents on neurophysiologically identified VTA-DA neurons. Methylphenidate suppressed the. neuronal activity of these neurons for 210 +/- 30 sec. Stimulation of the prefrontal cortex afferent fibers to these VTA-DA neurons in the presence of TTX, saclofen, and picrotoxin led to the conclusion that this input is mediated via NMDA and kainate/AMPA receptors and may participate to induce behavioral sensitization to psychostimulants. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 3 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000188539700002 L2 - methylphenidate (ritalin);behavior;neuronal recording;ventral tegmental area;prefrotital cortex stimulation;dopaminergic neurons;ATTENTION-DEFICIT/HYPERACTIVITY DISORDER; EXCITATORY AMINO-ACIDS; BEHAVIORAL SENSITIZATION; AMPHETAMINE PSYCHOSIS; DIURNAL DIFFERENCES; LOCOMOTOR-ACTIVITY; COCAINE; EXPRESSION; RAT; INDUCTION SO - Life Sciences 2004 ;74(13):1581-1592 12066 UI - 4511 AU - Prieto P AU - Gomez ME AU - Campillo G AU - Berger A AU - Baca E AU - Escudero R AU - Morales F AU - Guimpel J AU - Haberkorn N AD - Univ Valle, Dept Fis, Cali 25360, ColombiaHitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City, DF, MexicoComis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaPrieto, P, Univ Valle, Dept Fis, Cali 25360, Colombia TI - Exchange-coupling effect and magnetotransport properties in epitaxial La2/3Ca1/3MnO3/La1/3Ca2/3MnO3 superlattices AB - We have measured structural, magnetic and, magneto transport properties of heterostructures consisting of La1-xCaxMnO3 ferromagnetic (FM) layers (x = 0.33) and antiferromagnetic (AF) layers (x = 0.67). FM/AF superlattices were grown by a high-pressure sputtering technique on (001) oriented SrTiO3 substrates. We have systematically varied the thickness of the ferromagnetic layers, while maintaining the thickness of the antiferromagnetic layers fixed. The total superlattice thickness was held approximately constant. The XRD analysis confirmed the existence of the superlattice structure by the multiple satellite peaks around the 001 manganite Bragg reflections. We have done field cooling (FC) and zero field cooling (ZFC) magnetization, and magneto resistance measurements at temperatures between 10 K and 280 K. The existence of an exchange bias effect at temperatures below the Neel temperature of the AF layer was revealed by magnetization loops after field cooling. The exchange bias field magnitude H-ex exhibited exponential temperature dependence below the blocking temperature, as well as an inverse proportionality with the ferromagnetic layer thickness. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Argentina MH - Colombia MH - Mexico|Distrito Federal MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000223613800023 L2 - BILAYERS; DEPENDENCE; BIAS SO - Physica Status Solidi A-Applied Research 2004 ;201(10):2343-2346 12067 UI - 4739 AU - Prieur JL AU - Avila R AU - Daigne G AU - Vernin J AD - Observ Midi Pyrenees, Lab Univ Astrophys, CNRS, UMR 5572, F-31400 Toulouse, FranceUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoObserv Aquitain Sci Univers, UMR 5804, F-33270 Floirac, FranceUniv Nice, Lab Univ Astrophys Nice, CNRS, UMR 6525, F-06108 Nice 2, FrancePrieur, JL, Observ Midi Pyrenees, Lab Univ Astrophys, CNRS, UMR 5572, 14 Ave Edouard Belin, F-31400 Toulouse, France TI - Automatic determination of wind profiles with generalized SCIDAR AB - We present an iterative, potentially automated method for deriving wind profiles from generalized scintillation detection and ranging (SCIDAR) measurements, which can work in a nonsupervised mode. It is an extension of our CLEAN-based method previously developed for profile determination. The algorithm is C-N(2) based on a morphological analysis of the cross-correlation function of consecutive scintillation irradiance frames, with the introduction of some knowledge from the profiles, which are determined from the autocorrelation C-N(2) of those frames. This method was successfully tested on data from the site-testing observations made at San Pedro Martir in 2000, even for the most difficult cases MH - France MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6280 UR - ISI:000223073400009 L2 - SAN-PEDRO-MARTIR; ATMOSPHERIC-TURBULENCE; SCINTILLATION; SPECKLE SO - Publications of the Astronomical Society of the Pacific 2004 ;116(822):778-789 12068 UI - 4380 AU - Proenza JA AU - Ortega-Gutierez F AU - Camprubi A AU - Tritlla J AU - Elias-Herrera M AU - Reyes-Salas M AD - Univ Barcelona, Fac Geol, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Geocinecias, Queretaro 76230, MexicoProenza, JA, Univ Barcelona, Fac Geol, Dept Cristallog Mineral & Diposits Minerals, C Marti I Franquest S-N, E-08028 Barcelona, Spain TI - Paleozoic serpentinite-enclosed chromitites from Tehuitzingo (Acatlan Complex, southern Mexico): a petrological and mineralogical study AB - The serpentinites and associated chromitite bodies in Tehuitzingo (Acatlan Complex, southern Mexico) are in close relationship with eclogitic rocks enclosed within a metasedimentary sequence, suggesting that the serpentinites, chromitites and eclogitic rocks underwent a common metamorphic history. Primary chromites from the chromitite bodies at Tehuitzingo are of refractory-grade (Al-rich) and have a chemical composition similar to that expected to be found in an ophiolitic environment. The chromite grains in chromitites and serpentinites are systematically altered to 'ferritchromite'. The alteration trend is usually characterized by a decrease in the Al, Mg and Cr contents coupled by an increase in Fe3+ and Fe2+. The Tehutizingo chromitites have low Platinum Group Elements (PGE) contents, ranging from 102 to 303 ppb. The chondrite-normalized PGE patterns are characterized by an enrichment in the Ir-subgroup elements (IPGE = Os, Ir, Ru) relative to the Pd-subgroup elements (PPGE = Rh, Pt, Pd). In addition, all chromitite samples display a negative slope from Ru to Pd [(Os + Ir + Ru)/(Pt + Pd) = 4.78 - 14.13]. These patterns, coupled with absolute PGE abundances, are typical of ophiolitic chromitites elsewhere. Moreover, all the analyzed samples exhibit chondrite-normalized PGE patterns similar to those found for non-metamorphosed ophiolitic chromitites. Thus, the PGE distribution patterns found in the Tehuitzingo chromitites have not been significantly affected by any subsequent Paleozoic high-pressure (eclogite facies) metamorphic event. The chondrite-normalized PGE patterns of the enclosing serpentinites also indicate that the PGE distribution in the residual mantle peridotites exposed in Tehuitzingo was unaffected by high-pressure metamorphism, or subsequent hydrothermal alteration since the serpentinites show a similar pattern to that of partially serpentinized peridotites present in mantle sequences of non-metamorphosed ophiolites. Our main conclusion is that the chromitites and serpentinites from Tehuizingo experienced no significant redistribution (or concentration) of PGE during the serpentinization process or the high-pressure metamorphic path, or during subsequent alteration processes. If any PGE mobilization occurred, it was restricted to individual chromitite bodies without changing the bulk-rock PGE composition. Our data suggest that the Tehuitzingo serpentinites and associated chromitites are a fragment of oceanic lithosphere formed in an arc/back-arc environment, and represent an ophiolitic mantle sequence from a supra-subduction zone, the chemical composition of which remained essentially unchanged during the alteration and metamorphic events that affected the Acatlan Complex. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0895-9811 UR - ISI:000223944000002 L2 - Tehuitzingo;Mexico;Acatlan complex;serpentinites;chromitites;platinum-group elements;eclogite-facies metamorphism;PLATINUM-GROUP ELEMENTS; BACK-ARC BASIN; PODIFORM CHROMITITES; CHROMIAN SPINEL; TECTONIC SETTINGS; ULTRAMAFIC ROCKS; BASALTIC MELTS; OMAN OPHIOLITE; MANTLE; PERIDOTITES SO - Journal of South American Earth Sciences 2004 ;16(8):649-666 12069 UI - 2977 AU - Prokunina L AU - Oberg F AU - Kozyrev S AU - Gunnarsson I AU - Rodriguez E AU - Lima G AU - Trollmo C AU - Malmstrom V AU - arcon-Segovia D AU - arcon-Riquelme ME AD - Uppsala Univ, Uppsala, SwedenKarolinska Hosp, Karolinska Hosp, Solna, SwedenInst Nacl Ciencias Med & Nutr, Mexico City, DF, MexicoKarolinska Inst, Solna, Sweden TI - Abnormalities in the expression of PD-1 and the RUNX proteins in SLE suggest different but related mechanisms of disease pathogenesis MH - Mexico|Distrito Federal MH - Sweden PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000223799001235 SO - Arthritis and Rheumatism 2004 ;50(9):S461-S461 12070 UI - 4229 AU - Prol-Ledesma RM AU - Canet C AU - Torres-Vera MA AU - Forrest MJ AU - Armienta MA AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoMoss Landing Marine Labs, Moss Landing, CA 95039, USAProl-Ledesma, RM, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Vent fluid chemistry in Bahia Concepcion coastal submarine hydrothermal system, Baja California Sur, Mexico AB - Shallow submarine hydrothermal activity has been observed in the Bahia Concepcion bay, located at the Gulf coast of the Baja California Peninsula, along faults probably related to the extensional tectonics of the Gulf of California region. Diffuse and focused venting of hydrothermal water and gas occurs in the intertidal and shallow subtidal areas down to 15 m along a NW-SE-trending onshore-offshore fault. Temperatures in the fluid discharge area vary from 50 degreesC at the sea bottom up to 87 degreesC at a depth of 10 cm in the sediments. Chemical analyses revealed that thermal water is enriched in Ca, As, Hg, Mn, Ba, HCO3, Li, Sr, B, I, Cs, Fe and Si, and it has lower concentrations of Cl, Na, SO4 and Br than seawater. The chemical characteristics of the water samples indicate the occurrence of mixing between seawater and a thermal end-member. Stable isotopic oxygen and hydrogen composition of thermal samples plot close to the Local Meteoric Water Line on a mixing trend between a thermal end-member and seawater. The composition of the thermal end-member was calculated from the chemistry of the Submarine samples data by assuming a negligible amount of Mg for the thermal end-member. The results of the mixing model based on the chemical and isotopic composition indicate a maximum of 40% of the thermal end-member in the submarine vent fluid. Chemical geothermometers (Na/Li, Na-K-Ca and Si) were applied to the thermal end-member concentration and indicate a reservoir temperature of approximately 200 degreesC. The application of K-Mg and Na/Li geothermometers for vent fluids points to a shallow equilibrium temperature of about 120 degreesC. Results were integrated in a hydrogeological conceptual model that describes formation of thermal fluids by infiltration and subsequent heating of meteoric water. Vent fluid is generated by further mixing with seawater. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0377-0273 UR - ISI:000224230400004 L2 - hydrothermal vents coastal springs;fluid chemistry;Mexico;stable isotopes;mixing model;GUAYMAS BASIN; NEW-ZEALAND; LAKE; GEOCHEMISTRY; SEAWATER; GULF; GEOTHERMOMETER; 350-DEGREES-C; DEPOSITS; VALLEY SO - Journal of Volcanology and Geothermal Research 2004 ;137(4):311-328 12071 UI - 4615 AU - Prutskij T AU - az-Arencibia P AU - Brito-Orta RA AU - Mintairov A AU - Kosel T AU - Merz J AD - BUAP, Inst Ciencias, Peubla 72000, Pue, MexicoCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoBUAP, Inst Fis, Puebla 72570, MexicoUniv Notre Dame, Dept Elect Engn, Notre Dame, IN 46556, USAPrutskij, T, BUAP, Inst Ciencias, Apdo Postal 207, Peubla 72000, Pue, Mexico TI - Polarization anisotropy in the photoluminescence from InGaP layers grown by liquid phase epitaxy AB - The polarization anisotropy of the photoluminescence (PL) of InGaP films grown by liquid phase epitaxy (LPE) on GaAs substrates was studied. Photoluminescence measurements were performed in a wide temperature (4-250 K) range for emitted radiation polarized along the [0 1 1] and [0 (1) over bar 1] directions. Donor-acceptor transitions dominate at low temperature (4 K), while band-to-band transition does at higher temperature (250 K). A difference between the energy position of the spectral peaks for [0 1 1] and [0 (1) over bar 1] polarizations was found. This can be explained by the presence of compressive and tensile strained regions along the [0 1 1] direction. Moreover, the difference in the line shape of the spectra for different polarizations indicates the presence of anisotropy for these crystallographic directions. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000223500800077 L2 - liquid phase epitaxy;III-V semiconductors;photoluminescence SO - Applied Surface Science 2004 ;234(1-4):462-467 12072 UI - 4926 AU - Prutskij T AU - az-Arencibia P AU - Brito-Orta RA AU - Mintairov A AU - Kosel T AU - Merz J AD - BUAP, Inst Ciencias, Puebla 72000, Pue, MexicoCINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoBUAP, Inst Fis, Puebla 72570, MexicoUniv Notre Dame, Dept Elect Engn, Notre Dame, IN 46556, USAPrutskij, T, BUAP, Inst Ciencias, Apdo Postal 207, Puebla 72000, Pue, Mexico TI - Luminescence anisotropy of InGaP layers grown by liquid phase epitaxy AB - We have studied the anisotropy of the photoluminescence (PL) of InGaP films grown by liquid phase epitaxy on GaAs substrates. The PL measurements were performed in a wide temperature range (4-250 K) and exciting power density range for polarizations of the emitted radiation along the [011] and [0 (1) over bar1] directions. It was found that the donor-acceptor transition dominates at low temperature (4 K) while the band-to-band transition dominates at a higher temperature (250 K). The dependence of PL intensity on excitation intensity shows a characteristic behaviour for donor-acceptor recombination. The difference in the position of the spectral peak for [011] and [0 (1) over bar1] polarizations is a result of the splitting of the valence-band into heavy- and light-hole bands due to strain. Moreover, the difference in the line shape of the spectra for different polarizations indicates the presence of anisotropy for different crystallographic directions MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0022-3727 UR - ISI:000222582500011 L2 - PHOTOLUMINESCENCE-EXCITATION; RAMAN-SPECTROSCOPY; GA0.52IN0.48P; STRAIN; GAAS SO - Journal of Physics D-Applied Physics 2004 ;37(11):1563-1568 12073 UI - 5122 AU - Prutskij T AU - az-Arencibia P AU - Silva-Andrade F AU - Mintairov A AU - Kosel T AU - Merz J AD - Univ Autonoma Puebla, BUAP, Inst Ciencias, Puebla 72000, MexicoUniv Notre Dame, Dept Elect Engn, Notre Dame, IN 46556, USAInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoPrutskij, T, Univ Autonoma Puebla, BUAP, Inst Ciencias, Priv 17 Norte 3417,Col San Miguel Hueyotlipan,Apd, Puebla 72000, Mexico TI - Structural and optical characteristics of InGaP layers grown on GaAs substrates by LPE technique AB - A discussion of the structural and luminescent characteristics of InGaP films lattice matched to GaAs substrates is given. The films were grown by the liquid phase epitaxy technique using a graphite boat in a conventional horizontal reactor. The crystal structure of the layer was characterized by high-resolution X-ray, TEM and EDXS measurements. In the [220] dark field image in plane view the structure showed a coarse tweed pattern, with a period of 0.2 mum, oriented along the [100] and [010] directions. Photoluminescence (PL) measurements were performed in wide temperature (4-250 K) and exciting power density (four orders of magnitude) ranges for [011] and [0 (1) over bar1] polarizations of the emitted radiation. The measured PL spectra showed the presence of deformation related to lattice mismatch and thermal strain. The difference between the spectral peak positions for different polarizations is attributed to the splitting of the valence-band into a heavy- and light-hole bands due to lattice mismatch strain. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000222219000059 L2 - VAPOR-PHASE EPITAXY SO - Journal of Non-Crystalline Solids 2004 ;338-40():269-272 12074 UI - 5998 AU - Puccini G AU - Vucetich H AD - Natl Univ La Plata, Dept Fis, La Plata, Buenos Aires, ArgentinaNatl Autonomous Univ Mexico, Inst Fis, Mexico City 04510, DF, MexicoPuccini, G, Univ Miguel Hernandez, Inst Neurociencias, Apartado 18, Alacant 03550, Spain TI - Axiomatic foundations of Galilean Quantum Field Theories AB - A realistic axiomatic formulation of Galilean Quantum Field Theories is presented, from which the most important theorems of the theory can be deduced. In comparison with others formulations, the formal aspect has been improved by the use of certain mathematical theories, such as group theory and the theory of rigged Hilbert spaces. Our approach regards the fields as real things with symmetry properties. The general structure is analyzed and contrasted with relativistic theories MH - Argentina MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0015-9018 UR - ISI:000220169300004 L2 - axiomatization;quantum field theories;Galilean invariance;MECHANICS; SYSTEMS SO - Foundations of Physics 2004 ;34(2):263-295 12075 UI - 4214 AU - Puente ME AU - Bashan Y AU - Li CY AU - Lebsky VK AD - Ctr Biol Res NW, CIB, Environm Microbiol Grp, La Paz 23000, MexicoUS Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Corvallis, OR 97331, USABashan, Y, Ctr Biol Res NW, CIB, Environm Microbiol Grp, POB 128, La Paz 23000, Mexico TI - Microbial populations and activities in the rhizoplane of rock-weathering desert plants. I. Root colonization and weathering of igneous rocks AB - Dense layers of bacteria and fungi in the rhizoplane of three species of cactus (Pachycereus pringlei, Stenocereus thurberi, Opuntia cholla) and a wild fig tree (Ficus palmeri) growing in rocks devoid of soil were revealed by bright-field and fluorescence microscopy and field emission scanning electron microscopy. These desert plants are responsible for rock weathering in an ancient lava flow at La Purisima-San Isidro and in sedimentary rock in the Sierra de La Paz, both in Baja California Sur, Mexico. The dominant bacterial groups colonizing the rhizoplane were fluorescent pseudomonads and bacilli. Seven of these bacterial species were identified by the 16S rRNA molecular method. Unidentified fungal and actimomycete species were also present. Some of the root-colonizing microorganisms fixed in vitro N-2, produced volatile and non-volatile organic acids that subsequently reduced the pH of the rock medium in which the bacteria grew, and significantly dissolved insoluble phosphates, extrusive igneous rock, marble, and limestone. The bacteria were able to release significant amounts of useful minerals, such as R K, Mg, Mn, Fe, Cu, and Zn from the rocks and were thermo-tolerant, halo-tolerant, and drought-tolerant. The microbial community survived in the rhizoplane of cacti during the annual 10-month dry season. This study indicates that rhizoplane bacteria on cacti roots in rock may be involved in chemical weathering in hot, subtropical deserts MH - Mexico|Baja California Sur MH - USA PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 13 U4 - Plant Sciences U5 - J;Article AV - English IS - 1435-8603 UR - ISI:000224216100015 L2 - Bacillus;cactus;cardon;cholla;desert;Ficus;fig tree;fluorescent pseudomonads;lava degradation;nitrogen fixation;Opuntia;Pachycereus;phosphate solubilization;rock weathering;soil formation;Stenocereus;AZOSPIRILLUM-BRASILENSE CD; RESOURCE-ISLAND SOILS; SONORAN DESERT; SOLUBILIZING MICROORGANISMS; ENDOLITHIC MICROORGANISMS; PACHYCEREUS-PRINGLEI; SURFACE COLONIZATION; TRIOCTAHEDRAL MICA; CACTUS SEEDLINGS; FIXING BACTERIA SO - Plant Biology 2004 ;6(5):629-642 12076 UI - 4215 AU - Puente ME AU - Li CY AU - Bashan Y AD - Ctr Biol Res NW, CIB, Environm Microbiol Grp, La Paz 23000, BCS, MexicoUS Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Corvallis, OR 97331, USABashan, Y, Ctr Biol Res NW, CIB, Environm Microbiol Grp, POB 128, La Paz 23000, BCS, Mexico TI - Microbial populations and activities in the rhizoplane of rock-weathering desert plants. II. Growth promotion of cactus seedlings AB - Four bacterial species isolated from the rhizoplane of cacti growing in bare lava rocks were assessed for growth promotion of giant cardon cactus seedlings (Pachycereus pringlei). These bacteria fixed N-2, dissolved P, weathered extrusive igneous rock, marble, and limestone, and significantly mobilized useful minerals, such as P, K, Mg, Mn, Fe, Cu, and Zn in rock minerals. Cardon cactus seeds inoculated with these bacteria were able to sprout and grow normally without added nutrients for at least 12 months in pulverized extrusive igneous rock (ancient lava flows) mixed with perlite. Cacti that were not inoculated grew less vigorously and some died. The amount of useful minerals (P, K, Fe, Mg) for plant growth extracted from the pulverized lava, measured after cultivation of inoculated plants, was significant. This study shows that rhizoplane bacteria isolated from rock-growing cacti promote growth of a cactus species, and can help supply essential minerals for a prolonged period of time MH - Mexico|Baja California Sur MH - USA PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences U5 - J;Article AV - English IS - 1435-8603 UR - ISI:000224216100016 L2 - Azospirillum;Bacillus;cactus;carclon;Citrobacter;desert;N-2-fixation;Pachycereus;phosphate solubilization;Pseudomonas;rock degradation;rock weathering;soil formation;AZOSPIRILLUM-BRASILENSE; SONORAN DESERT; SOLUBILIZING MICROORGANISMS; PACHYCEREUS-PRINGLEI; TRIOCTAHEDRAL MICA; RHIZOSPHERE; INOCULATION; BACTERIA; ESTABLISHMENT; MYCORRHIZAL SO - Plant Biology 2004 ;6(5):643-649 12077 UI - 3916 AU - Pulido-Cejudo G AU - Miranda H AU - El Abdaimi K AU - Wang C AU - Kar BT AU - Acevedo JM AU - Cardenas JM AU - Gutierrez ES AU - Palacios GP AD - Canbreal Therodiagnost Int Inc, Canadian Breast Canc Labs, Ottawa, ON K1G 5Z3, CanadaICT SA De CV, Invest Sci & Technol, Coyoacan, DF, MexicoPulido-Cejudo, G, Canbreal Therodiagnost Int Inc, Canadian Breast Canc Labs, 600 Peter Morand Crescent Suite 330, Ottawa, ON K1G 5Z3, Canada TI - A monoclonal antibody driven biodiagnostic system for the quantitative screening of breast cancer AB - A prospective clinical parametric study comprising women afflicted by breast cancer and otherwise healthy participants was undertaken. The mean plasmatic concentration of putative leucine amino peptidase and nucleoside diphosphate phosphotransferase enzymatic complex in breast cancer cases was significantly elevated [43.9 +/- 2.8 mug ml(-1) (n = 9)] when compared to those found in otherwise healthy women [8.07 +/- 0.14 mug ml(-1) = 8)]. Women without images compatible with any tumours (n = 13) had a mean concentration of 10.77 +/- 1.49 mug ml(-1). The mean value obtained in women with fibroadenomas was 10.15 +/- 0.81 mug ml(-1) (n = 6) and with cystic fibrosis mastopathy 8.75 +/- 0.28 mug ml-(1) (n = 7). The efficacy of a tandem quantitative biodiagnostic system as a parametric screening tool for the early detection of breast cancer is underlined, raising the possibility of increasing the cost effectiveness of current imaging non-parametric technologies MH - Canada MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000225103700004 L2 - biodiacynostics;blood test;breast cancer;monoclonal antibodies;quantitative screening;WOMEN SO - Biotechnology Letters 2004 ;26(17):1335-1339 12078 UI - 4010 AU - Pulido-Cejudo G AU - El Abdaimi K AU - Wang C AU - Kar B AU - Medina-Acevedo J AU - Cardenas JM AU - Sarti-Gutierrez EJ AU - Martinez-Dominguez M AD - Canadian Breast Canc Labs Canbreal Therodiagnost, Ottawa, ON K1G 5Z3, CanadaInvest Sci & Technol ICT Mexicana, SA CV Div Norte, Coyoacan 04620, MexicoSA CV, Labs Columbia, Mexico City 04850, DF, MexicoPulido-Cejudo, G, Ottawa Life Sci Technol Pk,600 Peter Morand Cres, Ottawa, ON K1G 5Z3, Canada TI - Model building and quantitative analysis of a tandem immunocapturing assay as a screening tool for breast cancer AB - The onset of breast cancer appears to occur, on average, a decade earlier in Mexican women in comparison to American or European women. Early detection and prevention of breast cancer are of crucial importance to increase survival and improve quality of life. Based on the molecular elucidation of critical events leading to breast carcinogenesis, a tandem immuno-capturing blood test was developed as a quantitative population screening assay in view of providing a cost-effective and non-invasive alternative to population screening. Clinical analysis of 63 Mexican women within an age group of 35-70, revealed that Interstron activity increases from 800+/-65 IUJPA (Interstron Units) in the asymptomatic normal women to 994+/-100 IUJPA in the symptomatic/benign group, reaching 1289+/-81 IUJPA in the cancerous group. Accordingly, activity thresholds were established at 800 and 1200 IUJPA respectively, encompassing three risk groups: (i) Healthy Otherwise Normal (<800 IUJPA); (ii) Grey Risk Area (>800 and <1200 IUJPA), and (iii) At Risk group (>1200 IUJPA). Taking into account both baseline and clinical case reports, the Healthy Otherwise Normal group and the At Risk group were mostly homogeneous in nature, comprising a population of normal and cancer patients respectively. The Grey Risk group is heterogeneous, likely reflecting a transitional nature towards a potential early stage of breast disease development. Based on these results, a screening algorithm was developed as the underlining principle for population surveillance encompassing over 30,000 Mexican women. The current screening results have enabled us to objectively prioritize medical attention to approximately 1 in 8 women out of the general population mapped within the At Risk group. Overall, our findings suggest that monitoring Interstron activity units provides a valuable quantitative screening analysis as to selectively streamline the population of women in need of early medical counseling and/or mammography, thereby enhancing both the quality and cost-effectiveness of preventative population surveillance programs targeting breast cancer MH - Canada MH - Mexico|Distrito Federal PB - ATHENS: PROFESSOR D A SPANDIDOS RP - NOT IN FILE U3 - TC 0 U4 - Oncology U5 - J;Article AV - English IS - 1019-6439 UR - ISI:000224713500020 L2 - breast cancer;prevention;quantitative immunocapturing blood test;HORMONE-REPLACEMENT THERAPY; ESTROGEN PLUS PROGESTIN; BODY-MASS INDEX; POSTMENOPAUSAL WOMEN; ANTIBODY-PRODUCTION; SERUM CONCENTRATION; RANDOMIZED-TRIAL; UNITED-STATES; CELL-CULTURE; RISK SO - International Journal of Oncology 2004 ;25(5):1365-1374 12079 UI - 3299 AU - Pulinets SA AU - Liu JY AD - Natl Autonomous Univ Mexico, Inst Geophys, Mexico City 04510, DF, Mexico. Natl Cent Univ, Inst Space Sci, Chungli 320, Taiwan TI - Ionospheric variability unrelated to solar and geomagnetic activity AB - Ionospheric variability has become a subject of one of the most intensive studies in the area of ionospheric physics. Regardless of our improved knowledge of the ionosphere dynamics, the day-to-day variability still lies within the framework of statistical estimations and the underlying physical mechanisms are far from being fully understood. Significant deviations from monthly median values are observed from time to time in ionospheric records during completely quiet solar and geophysical conditions and are not fully understood. Recently the important role of the large scale vertical atmospheric electric fields penetrating into the ionosphere was revealed. The origin of such fields can be different, starting from orographic effect up to seismic activity. The recently published physical model of electric field effect on the ionosphere at least in part explains the ionospheric variability and the present paper is a modest attempt to demonstrate the effects of anomalous electric fields on the ionosphere using some examples. (C) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Taiwan T3 - IRI: QUANTIFYING IONOSPHERIC VARIABILITYAdvances in space research PB - KIDLINGTON: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences U5 - S;Article NT - SEnglishArticlepulse@geofisica.unam.mx jyliu@jupiter.ss.ncu.edu.tw7THE BOULEVARD, LANGFORD LANE,, KIDLINGTON OX5 1GB, OXFORD, ENGLANDADV SPACE RESBBN80 AV - English IS - 0273-1177 UR - ISI:000226373800012 L2 - ionospheric variability;anomolous atmospheric electric field SO - 2004 ;(9):1926-1933 12080 UI - 3520 AU - Pulinets SA AU - Gaivoronska TB AU - Contreras AL AU - Ciraolo L AD - UNAM, Inst Geophys, Mexico City, DF, MexicoRAS, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk, RussiaCNR, Inst Appl Phys, Florence, ItalyPulinets, SA, UNAM, Inst Geophys, Mexico City, DF, Mexico TI - Correlation analysis technique revealing ionospheric precursors of earthquakes AB - In this paper we focus on the variability of electron concentration in the ionosphere measured by ground based ionosondes and GPS receivers around the time of strong earthquakes. It has been detected and statistically proven that several days before the seismic shock the level of this variability increases at the station closest to the epicenter, a fact which can be regarded as precursory phenomenon. More precisely the localness of this specific kind of ionospheric variability is used for the correlation analysis of data of several observation points. The similarity of geographical location of the observation points leads to the similarity of ionospheric variations registered at these sites during both quiet and disturbed geomagnetic conditions, except in the case of those located at the seismoactive zone. As a rule, the local anomalies in the F2 layer and TEC accompanying the preparation of strong earthquakes show themselves in the breaking of the mutual correlation of the critical frequencies f(0)F2 or TEC between stations situated in and outside the seismic zone. The precursory phenomenon appears I to 7 days before the time of the seismic shock MH - Italy MH - Mexico|Distrito Federal MH - Russia PB - KATLENBURG-LINDAU: EUROPEAN GEOSCIENCES UNION RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 1561-8633 UR - ISI:000225976300011 L2 - ANOMALIES; STATION; TAIWAN; RADON SO - Natural Hazards and Earth System Sciences 2004 ;4(5-6):697-702 12081 UI - 4641 AU - Pusztai L AU - Dominguez H AU - Pizio OA AD - Hungarian Acad Sci, Neutron Phys Lab, Res Inst Solid State Phys & Opt, H-1525 Budapest, HungaryUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoPusztai, L, Hungarian Acad Sci, Neutron Phys Lab, Res Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary TI - Reverse Monte Carlo modeling of the structure of colloidal aggregates AB - In this work we present results for the structure of aerogels coming from the diffusion-limited cluster aggregation simulation method. Pair distribution functions and structure factors, resulting from simulation, were considered as experimental input for reverse Monte Carlo modeling. The modeling yielded structural models with pair distribution functions and structure factors nearly identical to the results of the simulations. Particle configurations from both the simulations and reverse Monte Carlo modeling have been analyzed in terms of the distribution of the number of neighbors. It is suggested that the reverse Monte Carlo method, when applied to the structure factor, may be a suitable technique for the interpretation of experimental scattering data on colloidal aerogels. (C) 2004 Elsevier Inc. All rights reserved MH - Hungary MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000223378900011 L2 - aerogel;structure;computer simulation;diffusion-limited cluster aggregation;reverse Monte Carlo;ANGLE NEUTRON-SCATTERING; DIFFUSION-LIMITED AGGREGATION; RANGE CORRELATIONS; SILICA AEROGELS; SIMPLE LIQUIDS; SIMULATION; DIFFRACTION; CLUSTERS; CARBONS SO - Journal of Colloid and Interface Science 2004 ;277(2):327-334 12082 UI - 3826 AU - Qiang WC AU - Dong SH AD - Xian Univ Architecture & Technol, Fac Sci, Xian 710055, Peoples R ChinaInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoQiang, WC, Xian Univ Architecture & Technol, Fac Sci, Xian 710055, Peoples R China TI - An alternative approach to calculating the mean values (r(k))over-bar for hydrogen-like atoms AB - Based on the exact expressions of the integral for two confluent hypergeometric functions systematically obtained by the MATHEMATICA package INTEPFFLL, we obtain the mean values r(k)(\k\ less than or equal to 8) for hydrogen-like atoms analytically. It is found that these formulas are very useful in quantum mechanics and atomic physics MH - Mexico|Distrito Federal MH - Peoples R China PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-8949 UR - ISI:000225268100002 L2 - PSEUDOHARMONIC OSCILLATOR; LADDER OPERATORS; DYNAMIC GROUP; REALIZATION; STATES SO - Physica Scripta 2004 ;70(5):276-279 12083 UI - 4286 AU - Quihui-Cota L AU - Valencia ME AU - Crompton DWT AU - Phillips S AU - Hagan P AU - az-Camacho SP AU - Tejas AT AD - Ctr Invest Alimentac & Desarrollo AC, Div Human Nutr, Hermosillo 83000, Sonora, MexicoUniv Glasgow, Inst Biomed & Life Sci, Div Infect & Immun, Glasgow G12 8QQ, Lanark, ScotlandUniv Autonoma Sinaloa, Dept Publ Hlth, Culiacan, MexicoTechnol Inst Oaxaca, Dept Chem Engn & Biochem, Oaxaca, MexicoQuihui-Cota, L, Ctr Invest Alimentac & Desarrollo AC, Div Human Nutr, Carretera La Victoria,KM 06 A-P 1735, Hermosillo 83000, Sonora, Mexico TI - Prevalence and intensity of intestinal parasitic infections in relation to nutritional status in Mexican schoolchildren AB - Undernutrition and intestinal parasitic infections affect childhood development and morbidity in many developing countries. Undernutrition may increase susceptibility to parasitic infections which in turn impair the nutritional status of the host. The relationship between intestinal parasitic infections and nutritional status in 400 Mexican schoolchildren was investigated. More than half of the children in the study showed intestinal parasites and polyparasitism. The prevalence of helminth infections was significantly higher in Oaxaca than in Sinaloa (P < 0.05). Z scores for weight-for-age (WA) and height-for-age (HA) were much lower in children of Oaxaca than in Sinaloa (P < 0.001). A significantly higher Z score for weight-for-height (WH), WA, and HA were found in non-infected versus infected children (P < 0.05). Higher prevalences of intestinal infections were found in children with lower HA and WA than in normally nourished children (P < 0.05). Higher intensities of Ascaris lumbricoides and Trichuris trichiura were found in the schoolchildren of Sinaloa than in Oaxaca (P < 0.01). Negative and significant associations were found between Hymenolepis nano and T trichiura infection (eggs per gram) and nutritional status. Intestinal parasitic infections may be regarded as main risk factors associated with poor nutritional status in Mexican schoolchildren. (C) 2004 Royal Society of Tropical Medicine and Hygiene. Published by Elsevier Ltd. All rights reserved MH - Mexico|Sinaloa MH - Mexico|Oaxaca MH - Mexico|Sonora MH - United Kingdom PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 5 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000224154400004 L2 - intestinal parasitic infections;nutritional status;prevalence;intensity;schoolchildren;Mexico;PRESCHOOL-CHILDREN; MALNUTRITION SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2004 ;98(11):653-659 12084 UI - 4896 AU - Quintana M AU - Haro-Poniatowski E AU - Batina N AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoCSIC, Inst Opt, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoQuintana, M, Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico TI - Effect of gas pressure on the growth of selenium thin films by pulsed laser deposition AB - The effect of an inert gas pressure on the structure of selenium thin films has been systematically investigated in the pulsed laser deposition process. The ablated material is deposited on Au (111) gold thin films for its characterization by atomic force microscopy (AFM). Analysis of the surface morphology shows that instead of the formation of a uniform Se thin film on top of Au (111) terraces, as it occurs in high vacuum, the film grows as two dimensional ellipsoid shaped aggregates. The size of these Se aggregates increases significantly with the gas pressure and reaches a maximum at pressures of similar to1.5 Torr, and subsequently decreases with further increase of the gas pressure. This effect is probably due to the fact that the kinetic energy of the impinging species decreases as pressure increases, thus impeding diffusion on the substrate surface. However, further increase in the pressure prevents the Se species from being deposited on the substrate resulting in a decrease in size of the aggregates MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000222766100045 L2 - ABLATION SO - Applied Physics A-Materials Science & Processing 2004 ;79(4-6):903-906 12085 UI - 4972 AU - Quintanar-Stephano A AU - Kovacs K AU - Berczi I AD - Univ Autonoma Aguascalientes, Dept Fisiol & Farmacol, Ctr Ciencias Basicas, Aguascalientes 20100, MexicoUniv Toronto, St Michaels Hosp, Dept Lab Med & Pathobiol, Toronto, ON M5B 1W8, CanadaUniv Manitoba, Fac Med, Dept Immunol, Winnipeg, MB R3E 0W3, CanadaQuintanar-Stephano, A, Univ Autonoma Aguascalientes, Dept Fisiol & Farmacol, Ctr Ciencias Basicas, Av Univ 940, Aguascalientes 20100, Mexico TI - Effects of neurointermediate pituitary lobectomy on humoral and cell-mediated immune responses in the rat AB - Objective: Chronic stress is characterized by an increased activity of the hypothalamic-pituitary-adrenocortical axis and decreased humoral and cell-mediated immune responses. In the rat, corticosterone is the principal natural immune suppressor. Neurointermediate pituitary lobectomy ( NIL) in rats induces diabetes insipidus and protracted increases in basal adrenocorticotropin and corticosterone plasma levels, a situation that resembles chronic stress. In this paper, we evaluated the effects of NIL on humoral (hemagglutinin titers and foot-pad swelling to sheep red blood cells-SRBC) and cell-mediated immune responses ( contact hypersensitivity to dinitrochlorobenzene). Methods: The studies were conducted on NIL Wistar rats (body weight 150-200 g) 3 weeks after surgery. For comparisons, nonoperated control rats were used. Results: NIL resulted in an increased water intake. Body weight gain and adrenal, thymus, and spleen weights were within the range of nonoperated controls. Eight days after SRBC immunizations a second SRBC injection into the footpad resulted in a decreased swelling response in NIL rats. The hemagglutinin titers were also reduced in the NIL rats. Conclusions: These results indicate that: ( 1) NIL reduces humoral immune responses and decreases the cell-mediated immune response; ( 2) the immune alterations are most likely due to the increased activity of the hypothalamic-pituitary-adrenocortical axis induced by NIL, and ( 3) NIL animals constitute a valuable paradigm to study hypothalamic-pituitary-immune interactions. Copyright (C) 2004 S. Karger AG, Basel MH - Canada MH - Mexico|Aguascalientes PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism;Immunology;Neurosciences U5 - J;Article AV - English IS - 1021-7401 UR - ISI:000222535000005 L2 - neurointermediate pituitary lobectomy;humoral and cell-mediated immune responses;hypothalamic-pituitary-adrenocortical axis, rat;CORTICOTROPIN-RELEASING HORMONE; ARGININE-VASOPRESSIN; CONTACT SENSITIVITY; SECRETION; STRESS; OXYTOCIN; SYSTEM; RNA SO - Neuroimmunomodulation 2004 ;11(4):233-240 12086 UI - 5463 AU - Quintanar-Stephano A AU - Organista A AU - Tinajero M AU - Chavira R AU - Medina M AU - Sanchez O AU - Berczi I AU - Kovacs K AD - Univ Aguascalientes, Aguascalientes 20100, MexicoINCMYN, Mexico City, DF, MexicoUniv Manitoba, Winnipeg, MB R3T 2N2, CanadaSt Michaels Hosp, Toronto, ON M5B 1W8, Canada TI - Effects of neurointermediate pituitary lobectomy and desmopressin on experimental autoimmune encephalomyelitis in rats MH - Canada MH - Mexico|Aguascalientes MH - Mexico|Distrito Federal PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470702374 SO - Faseb Journal 2004 ;18(5):A1256-A1256 12087 UI - 5260 AU - Quintero-Ramos A AU - Churey JJ AU - Hartman P AU - Barnard J AU - Worobo RW AD - Cornell Univ, Dept Food Sci & Technol, New York State Agr Expt Stn, Geneva, NY 14456, USAUniv Autonoma Chihuahua, Fac Ciencias Quim, Chihuahua 31320, MexicoFPE Inc, Macedon, NY 14502, USAWorobo, RW, Cornell Univ, Dept Food Sci & Technol, New York State Agr Expt Stn, Geneva, NY 14456 USA TI - Modeling of Escherichia coli inactivation by UV irradiation at different pH values in apple cider AB - This study examined the effects and interactions of UV light dose (1,800 to 20,331 muJ/cm(2)) and apple cider pH (2.99 to 4.41) on the inactivation of Escherichia coli ATCC 25922, a surrogate for E. coli O157/H7. A predictive model was developed to relate the log reduction factor of E. coli ATCC 25922 to the UV dose. Bacterial populations for treated and untreated samples were enumerated with the use of nonselective media. The results revealed that UV dose was highly significant in the inactivation of E. coli, whereas pH showed no significant effect at higher UV doses. Doses of 6,500 muJ/cm(2) or more were sufficient to achieve a greater than 5-log reduction of E. coli. Experimental inactivation data were fitted adequately by a logistic regression model. UV irradiation is an attractive alternative to conventional methods for reducing bacteria in unpasteurized apple cider MH - Mexico|Chihuahua MH - USA PB - DES MOINES: INT ASSOC FOOD PROTECTION RP - NOT IN FILE U3 - TC 12 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 0362-028X UR - ISI:000221897200010 L2 - O157-H7; JUICE; SURVIVAL SO - Journal of Food Protection 2004 ;67(6):1153-1156 12088 UI - 5137 AU - Quirasco M AU - Schoel B AU - Plasencia J AU - Fagan J AU - Galvez A AD - Natl Autonomous Univ Mexico, Fac Quim, Dept Alimentos & Biotechnol, Mexico City 04510, DF, MexicoGenet ID NA Inc, Fairfield, IA 52556, USANatl Autonomous Univ Mexico, Fac Quim, Dept Bioquim, Mexico City 04510, DF, MexicoGalvez, A, Natl Autonomous Univ Mexico, Fac Quim, Dept Alimentos & Biotechnol, Mexico City 04510, DF, Mexico TI - Suitability of real-time quantitative polymerase chain reaction and enzyme-linked immunosorbent assay for cry9C detection in Mexican corn tortillas: Fate of DNA and protein after alkaline cooking AB - Alkaline-cooked corn, called nixtamal, is the basis for many traditional corn products such as tortillas, chips, and taco shells that are used widely in Mexico and Central America and in the preparation of snack foods that are consumed globally. To assess the effects of alkaline and thermal treatments on the detectability of DNA and protein for the presence of genetically modified sequences, various nixtamalized products were prepared from. blends of conventional white corn containing 0.1, 1.0, and 10% transgenic corn (event CBH 351, StarLink(TM)). Real-time quantitative polymerase chain reactions (RTQ-PCR) and immunoassays were used to determine the cry9C gene and protein, respectively, in unprocessed corn kernels, freshly prepared, alkaline-cooked and ground corn (mass), masa flour, tortillas prepared from masa by heat treatment, chips prepared from damp masa dough by: deep frying, and from tortillas processed at high (200degreesC) and low temperatures (70degreesC). In spite of progressive degradation of genomic DNA during processing, RTQ-PCR genetic analysis. allowed detection and quantification of the cry9C,gene in all products prepared from 10, 1, and 0.1% StarLink corn, except deep-fried chips containing 0.1% StarLink. Enzyme-linked immunosorbent assays readily detected <1 ppm cry9C protein in all blends of unprocessed corn (10, 1, and 0.1% StarLink) as well as in nonfried tortilla and masa products. This technique was not suitable for thermally treated nixtamalized products containing <1% transgenic corn MH - Mexico|Distrito Federal MH - USA PB - GAITHERSBURG: AOAC INTERNATIONAL RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Analytical;Food Science & Technology U5 - J;Article AV - English IS - 1060-3271 UR - ISI:000222276400011 L2 - ZEA-MAYS; FOOD; FRACTIONS; MAIZE; OIL SO - Journal of Aoac International 2004 ;87(3):639-646 12089 UI - 5057 AU - Quiroga-Barranco R AU - Candel A AD - CINVESTAV, IPN, Dept Matemat, Mexico City 07300, DF, MexicoCalif State Univ Northridge, Dept Math, Northridge, CA 91330, USAQuiroga-Barranco, R, CINVESTAV, IPN, Dept Matemat, Apartado Postal 14-740, Mexico City 07300, DF, Mexico TI - Rigid and finite type geometric structures AB - Rigid geometric structures on manifolds, introduced by Gromov, are characterized by the fact that their infinitesimal automorphisms are determined by their jets of a fixed order. Important examples of such structures are those given by an H-reduction of the first order frame bundle of a manifold, where the Lie algebra of H is of finite type; in fact, for structures given by reductions to closed subgroups of first order frame bundles,finite type implies rigidity. The goal of this paper is to generalize this to geometric structures defined by reductions of frame bundles of arbitrary order, and to give an algebraic characterization of the property of being rigid in terms of a suitable notion of finite type MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0046-5755 UR - ISI:000222388600009 L2 - connections;finite type;rigidity;simple Lie groups SO - Geometriae Dedicata 2004 ;106(1):123-143 12090 UI - 4737 AU - Quiroz-Garcia B AU - Hernandez-Ortega S AU - Sterner V AU - Delgado G AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoLund Univ, Dept Organ & Bioorgan Chem, SE-22100 Lund, SwedenDelgado, G, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Transformations of the natural dimeric phthalide diligustilide AB - A series of intramolecular condensation products were obtained by base-catalyzed treatment of the natural bioactive dimeric phthalide diligustilide (1) using different reaction conditions and the yields remarkably depend on these. The reaction conditions to obtain selectively the intramolecular condensation derivatives or the hydrolysis products of diligustilide (1) are described. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Sweden PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4020 UR - ISI:000220751000014 L2 - diligustilide;dimeric phthalides;intramolecular condensations;hydrolysis SO - Tetrahedron 2004 ;60(16):3681-3688 12091 UI - 3043 AU - Quiroz-Mercado H AU - Regil AM AU - Leizaola-Fernandez C AU - Papa-Oliva G AU - Solis-Bermudez S AU - Estrada-Gonzalez LI AU - az-Castaneda AC AU - Guerrero-Naranjo JLE AU - Ligget PE AD - APEC, Retina Serv, Mexico City, DF, MexicoCornell Univ, Ctr Med, New York, NY, USA TI - Perfluorocarbon perfused vitrectomy (PCPV) for the treatment of posterior pole tumors MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338200767 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U171-U171 12092 UI - 3933 AU - Rabinovich V AU - Schulze BW AU - Tarkhanov N AD - Inst Politecn Nacl, ESIME Zacatenco, Mexico City 07738, DF, MexicoUniv Potsdam, Inst Math, D-14415 Potsdam, GermanyRabinovich, V, Inst Politecn Nacl, ESIME Zacatenco, Av IPN,Edif 1, Mexico City 07738, DF, Mexico TI - Boundary value problems in oscillating cuspidal wedges AB - The paper is devoted to pseudodifferential boundary value problems in domains with cuspidal wedges. We show a criterion for the Fredholm property of a boundary value problem and derive estimates of solutions close to edges MH - Germany MH - Mexico|Distrito Federal PB - TEMPE: ROCKY MT MATH CONSORTIUM RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0035-7596 UR - ISI:000224904000014 L2 - pseudodifferential operators;boundary value problems;manifolds with edges;PSEUDODIFFERENTIAL OPERATORS; ELLIPTIC EQUATIONS; CALCULUS; DOMAINS SO - Rocky Mountain Journal of Mathematics 2004 ;34(4):1399-1471 12093 UI - 3716 AU - Rabinovich VS AU - Roch S AD - ESIME Zacatenco, Inst Politech Natl, Mexico City 07738, DF, MexicoTech Univ Darmstadt, Fachbereich Math, D-64289 Darmstadt, GermanyRabinovich, VS, ESIME Zacatenco, Inst Politech Natl, Ed 1,2 Piso Av IPN, Mexico City 07738, DF, Mexico TI - Wiener algebras of operators, and applications to pseudodifferential operators AB - We introduce a Wiener algebra of operators on L-2(R-N) which contains, for example, all pseudodifferential operators in the Hormander class OPS0,00. A discretization based on the action of the discrete Heisenberg group associates to each operator in this algebra a band-dominated operator in a Wiener algebra of operators on l(2)(Z(2N), L-2(R-N)). The (generalized) Fredholmness of these discretized operators can be expressed by the invertibility of their limit operators. This implies a criterion for the Fredholmness on L-2(R-N) of pseudodifferential operators in OPS0,00 in terms of their limit operators. Applications to Schrodinger operators with continuous potential and other partial differential operators are given MH - Germany MH - Mexico|Distrito Federal PB - LEMGO: HELDERMANN VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0232-2064 UR - ISI:000225512000001 L2 - Wiener algebra;pseudodifferential operator;limit operators;Fredholmness;BAND-DOMINATED OPERATORS SO - Zeitschrift fur Analysis und Ihre Anwendungen 2004 ;23(3):437-482 12094 UI - 4162 AU - Rabinovich VS AU - Roch S AD - Inst Politecn Nacl, ESIME Zacatenco, Mexico City 07738, DF, MexicoTech Univ Darmstadt, Fachbereich Math, D-64289 Darmstadt, GermanyRabinovich, VS, Inst Politecn Nacl, ESIME Zacatenco, Ed 1,2 Do Piso,AvIPN, Mexico City 07738, DF, Mexico TI - Pseudodifference operators on weighted spaces, and applications to discrete Schrodinger operators AB - We study pseudodifference operators on Z(N) with symbols which are bounded on Z(N) x T-N together with their derivatives with respect to the second variable. In the same way as partial differential operators on R-N are included in an algebra of pseudodifferential operators, difference operators on ZN are included in an algebra of pseudodifference operators. Particular attention is paid to the Fredholm properties of pseudodifference operators on general exponentially weighted spaces l(w)(p)(Z(N)) and to Phragmen - Lindelof type theorems on the exponential decay at infinity of solutions to pseudodifference equations. The results are applied to describe the essential spectrum of discrete Schrodinger operators and the decay of their eigenfunctions at infinity MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0167-8019 UR - ISI:000224561300003 L2 - BAND-DOMINATED OPERATORS; SINGULAR-INTEGRALS; SYMBOLS SO - Acta Applicandae Mathematicae 2004 ;84(1):55-96 12095 UI - 5196 AU - Rabinovich VS AU - Roch S AU - Roe J AD - Inst Politecn Nacl, ESIME Zacatenco, Mexico City 07738, DF, MexicoTech Univ Darmstadt, Fachbereich Math, D-64289 Darmstadt, GermanyPenn State Univ, University Pk, PA 16802, USARabinovich, VS, Inst Politecn Nacl, ESIME Zacatenco, Ed 1,2 Do Piso,Av IPN, Mexico City 07738, DF, Mexico TI - Fredholm indices of band-dominated operators AB - The Fedholmness of a band-dominated operator on l(2) (Z) is closely related with the invertibility of its limit operators: the operator is Fredholm if and only if each of its limit operators is invertible and if the norms of their inverses are uniformly bounded. The goal of the present note is to show how the Fredholm index of a Fredholm band-dominated operator can be determined in terms of its limit operators MH - Germany MH - Mexico|Distrito Federal MH - USA PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 8 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000222028700005 L2 - band-dominated operators;Fredhohn indices;limit operators;K-theory in C*-algebras SO - Integral Equations and Operator Theory 2004 ;49(2):221-238 12096 UI - 3663 AU - Radford DC AU - Baktash C AU - Beene JR AU - Fuentes B AU - Galindo-Uribarri A AU - del Campo JG AU - Gross CJ AU - Halbert ML AU - Larochelle Y AU - Lewis TA AU - Liang JF AU - Mas J AU - Mueller PE AU - Padilla E AU - Shapira D AU - Stracener DW AU - Varner RL AU - Yu CH AU - Barton CJ AU - Caprio MA AU - Hartley DJ AU - Zamfir NV AD - Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Tennessee, Dept Phys & Astron, Knoxville, TN 37996, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoYale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06520, USABarton, CJ, Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831, USA TI - Nuclear structure studies with heavy neutron-rich RIBS at the HRIBF AB - Neutron-rich radioactive ion beams available from the HRIBF allow a variety of exciting measurements around the Sn-132 region, including Coulomb excitation, fusion-evaporation, and neutron transfer. The B(E2;0(+) --> 2(+)) value for first 2(+) excited states of neutron-rich Te-132,Te-134,Te-136 and Sn-126,Sn-128,Sn-130,Sn-132,Sn-134 have been measured by Coulomb excitation in inverse kinematics. The results are discussed in terms of the shell model and the quasiparticle random phase approximation. Neutron transfer onto a Te-134 beam, from Be-9 and C-13 targets to populate single-particle states in Te-135, has also been studied. Results, and plans for future experiments with these neutron-rich beams, are presented MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000225682600015 L2 - FACILITY SO - Nuclear Physics A 2004 ;746():83C-89C 12097 UI - 4855 AU - Radhika P AU - Cabeza M AU - Bratoeff E AU - Garcia G AD - Metropolitan Univ, Dept Biol Syst, Mexico City, DF, MexicoAndhra Univ, Dept Pharmaceut Sci, Visakhapatnam, Andhra Pradesh, IndiaNatl Autonomous Univ Mexico, Fac Chem, Dept Pharm, Mexico City, DF, MexicoNatl Autonomous Univ Mexico, Inst Biol, Mexico City, DF, MexicoCabeza, M, Metropolitan Univ, Dept Biol Syst, Mexico City, DF, Mexico TI - 5 alpha-Reductase inhibition activity of steroids isolated from marine soft corals AB - The aim of this study is to determine the 5alpha-reductase inhibitory activity of several new steroidal compounds PR-01-PR-07 by measuring the conversion of [H-3]T to [H-3]DHT in Penicillium crustosum broths. These compounds were obtained from marine soft corals collected on the coasts of Andaman and Nicobar at Hori, Natkal and Kalipur (Diglipur) Islands and identified as Sinularia grandilobata Verseveldt, Sinularia crassa Tixier-Durivault, Sinularia gravis Tixier-Durivault, Sinularia sp., Lobophytum sp., Lobophytum crassum and Cladiella sp. PR-01-PR-04 significantly inhibited the conversion of [H-3]T to [H-3]DHT (P < 0.05) whereas PR-05 and PR-06 did not show an appreciable difference (P > 0.05) in this model. On the other hand PR-07 stimulated (P < 0.05) the enzymatic reaction. (C) 2004 Elsevier Inc. All rights reserved MH - India MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0039-128X UR - ISI:000222872300001 L2 - 5 alpha-reductase inhibition;steroids;NICOBAR ISLANDS; TIXIER-DURIVAULT; HUMAN-PROSTATE; INDIAN-OCEAN; ANDAMAN; COASTS; POLYHYDROXYSTEROLS; TESTOSTERONE; PENICILLIUM; DERIVATIVES SO - Steroids 2004 ;69(7):439-444 12098 UI - 4203 AU - Raga AC AU - Beck T AU - Riera A AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGemini Observ, Hilo, HI 96720, USAUniv Politecn Catalunya, Dept Fis Engn Nucl, E-08800 Vilanova I La Geltru, SpainRaga, AC, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Ap 70-543, Mexico City 04510, DF, Mexico TI - Interpreting the observations of Herbig-Haro jets AB - This paper reviews the numerical simulations of radiative jets with concrete predictions of the emitted radiation, which can be compared directly with observations of individual HH objects. The only models that have been developed to this point are the "internal working surface model" (in which the structures along HH jets are interpreted as working surfaces resulting from a time-variability in the ejection) or the "Kelvin-Helmholtz instability model" (in which the HH knots are associated with shocks resulting from K-H instabilities in the jet beam/environment boundary). The predictions of intensity maps, line ratios, line profiles and proper motions are discussed MH - Mexico|Distrito Federal MH - Spain MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000224436900004 L2 - ISM : Herbig-Haro objects;ISM : jets and outflows;ISM : kinematics and dynamics;shock waves;KELVIN-HELMHOLTZ INSTABILITIES; NUMERICAL HYDRODYNAMIC SIMULATIONS; STELLAR JETS; PROPER MOTIONS; BOW-SHOCK; VARIABLE-VELOCITY; MOLECULAR OUTFLOWS; PROTOSTELLAR JETS; HIGH-RESOLUTION; RADIATIVE JETS SO - Astrophysics and Space Science 2004 ;293(1-2):27-36 12099 UI - 4545 AU - Raga AC AU - Noriega-Crespo A AU - Gonzalez RF AU - Velazquez PF AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCALTECH, Spitzer Sci Ctr, Pasadena, CA 91125, USARaga, AC, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Models for the infrared cavity of HH 46/47 AB - We have modeled the limb-brightened cavity seen in the new Spitzer Space Telescope IR images of the southwest lobe of HH 46/47 as the bow shock driven by an outflow from a young, low-mass star. We present models in which the outflow is a perfectly collimated, straight jet, models in which the jet precesses, and finally a model in which the outflow takes the form of a latitude-dependent wind. We study cases in which the outflow moves into a constant-density cloud and into a stratified cloud. We find that the best agreement with the observed cavity is obtained for the precessing jet in a stratified cloud. However, the straight jet (traveling in a stratified cloud) also gives cavity shapes close to the observed one. The latitude-dependent wind model that we have computed gives cavity shapes that are substantially wider than the observed cavity. We therefore conclude that the cavity seen in the Spitzer observations of the southwest lobe of the HH 46/47 outflow do not seem to imply the presence of a latitude-dependent wind, as it can be modeled successfully with a perfectly collimated jet model MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000223634300063 L2 - infrared : ISM;ISM : Herbig-Haro objects;ISM : jets and outflows;STELLAR JETS; MOLECULAR OUTFLOW; ENERGY-SOURCE; YOUNG STARS; OBJECTS; COLLIMATION; SIMULATIONS; SYSTEM; REGION; DISKS SO - Astrophysical Journal Supplement Series 2004 ;154(1):346-351 12100 UI - 6069 AU - Raga AC AU - Riera A AU - Masciadri E AU - Beck T AU - Bohm KH AU - Binette L AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, Dept Fis & Engn Nucl, E-08800 Vilanova I La Geltru, SpainUniv Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, SpainMax Planck Inst Astron, D-69117 Heidelberg, GermanyGemini Observ, Hilo, HI 96720, USAUniv Washington, Dept Astron, Seattle, WA 98195, USAUNAM, Inst Astron, Mexico City 04510, DF, MexicoRaga, AC, UNAM, Inst Ciencias Nucl, Apdo 70-543, Mexico City 04510, DF, Mexico TI - A variable-velocity, precessing jet model for HH 32 AB - HH 32 has a bright, strongly redshifted lobe with a system of scattered condensations. We propose that these condensations correspond to internal working surfaces in a variable ejection velocity, precessing jet. From a three-dimensional numerical simulation, we obtain predictions of [O II] lambda3726+ lambda3729, [ O III] lambda5007, [ O I] lambda6300, Halpha, [N II] lambda6583, and [S II] lambda6716+ lambda6731 intensity maps, for an orientation angle of similar to70degrees between the outflow axis and the plane of the sky ( as appropriate for HH 32). We also obtain predictions of radial velocity channel maps. We then compare these predictions with previously published observations of HH 32 and discuss the strengths and weaknesses of the model MH - Germany MH - Mexico|Distrito Federal MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000220081200040 L2 - ISM : Herbig-Haro objects;ISM : individual (HH 32);ISM : jets and outflows;ISM : kinematics and dynamics;shock waves;HERBIG-HARO OBJECTS; BOW-SHOCK-MODELS; PROPER MOTIONS; SIMULATIONS; EVOLUTION; EJECTION; OUTFLOW; HH-111; IMAGES; TAURI SO - Astronomical Journal 2004 ;127(2):1081-1088 12101 UI - 5065 AU - Rahn M AU - Haas JD AU - Cordero SLH AU - Campirano F AU - Martin LA AU - Villalpando S AU - Rivera J AD - Cornell Univ, Div Nutrit Sci, Ithaca, NY 14853, USACtr Invest Nutr & Salud, Inst Nacl Salud Publ, Cuernavaca, Morelos, Mexico TI - Iron deficiency and and perceived fatigue in Mexican female factory workers MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470600739 SO - Faseb Journal 2004 ;18(4):A153-A153 12102 UI - 3637 AU - Rakov N AU - Maciel GS AD - Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, BrazilUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoMaciel, GS, Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil TI - Enhancement of luminescence efficiency of f-f transitions from Tb3+ due to energy transfer from Ce3+ in Al2O3 crystalline ceramic powders prepared by low temperature direct combustion synthesis AB - In this Letter, we report the structural and luminescent properties of Tb:Ce:Al2O3 crystalline ceramic powders prepared through combustion synthesis at low temperature (similar to280 degreesC). The presence of Ce3+ (1.0 mol%) in the sample resulted in an enhancement of Tb3+ (1.0 mol%) overall emission intensity by a factor of similar to50. The analysis of the luminescence dynamics for the D-5(4) --> F-7(6) transition (similar to545 nm) of Tb3+ demonstrated that the mechanism responsible for the large enhancement of luminescence observed is efficient energy transfer from Ce3+ to Tb3+. (C) 2004 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000225906300050 L2 - THIN-FILMS; NANOCRYSTALS; PHOTOLUMINESCENCE; SPECTROSCOPY; PHOSPHOR; ALUMINA SO - Chemical Physics Letters 2004 ;400(4-6):553-557 12103 UI - 6477 AU - Rakov N AU - Mahmood A AU - Xiao M AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoXiao, M, UNAM, Dept Opt, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Surface metallic state of aluminum-nitride (AlN) thin films prepared by direct current (DC)-reactive magnetron sputtering: optical spectroscopic analysis with incoherent light AB - Work is reported on optical spectroscopy of aluminum-nitride (AlN) thin films. The films were prepared by DC-reactive magnetron sputtering with various deposition parameters. Reflection of the films was measured with an incoherent light source. Analysis on the spectrum of the reflection demonstrates that with certain deposition conditions the films become metallic at the surface, i.e. the periodic and slowly changing reflection spectrum that would be associated with dielectric or ceramic thin films is replaced by a spectrum without periodic feature and with two strongly enhanced bands, respectively at about 380 and 550 nm, which are some typic spectral features for metallic materials. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1359-6462 UR - ISI:000188063400006 L2 - aluminum-nitride thin films;direct current-reactive magnetron sputtering;optical spectroscopy;incoherent light SO - Scripta Materialia 2004 ;50(5):589-592 12104 UI - 5069 AU - Ramakrishnan U AU - Neufeld LM AU - Gonzalez-Cossio T AU - DiGirolamo A AU - Rivera J AU - Martorell R AD - Emory Univ, Atlanta, GA 30322, USAInst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca, Morelos, Mexico TI - Effects of multiple micronutrient supplements on child growth: A randomized controlled trial in semi-rural Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602323 SO - Faseb Journal 2004 ;18(4):A482-A482 12105 UI - 5771 AU - Ramakrishnan U AU - Neufeld LM AU - Gonzalez-Cossio T AU - Villalpando S AU - Garcia-Guerra A AU - Rivera J AU - Martorell R AD - Emory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30333, USAInst Nacl Salud Publ, Ctr Invest Nutr & Salud, Cuernavaca, Morelos, MexicoRamakrishnan, U, Emory Univ, Rollins Sch Publ Hlth, Dept Int Hlth, Atlanta, GA 30333 USA TI - Multiple micronutrient supplements during pregnancy do not reduce anemia or improve iron status compared to iron-only supplements in semirural Mexico AB - The impact of iron-only supplements (FE) versus multiple micronutrient supplements containing iron (MM) during pregnancy on iron status was assessed in a subsample (n = 453) of women who participated in a randomized double-blind trial in Mexico. Compliance, monitored by observation, was high (>85%). The two groups were similar at recruitment (<13 wk gestation) for various sociodemographic characteristics and for mean hemoglobin (Hb) concentrations and prevalence of anemia (Hb < 110 g/L; 11%). However, mean serum ferritin was higher (P < 0.05) in the MM group (n = 142) compared to the FE group (n = 148) and the prevalence of iron deficiency (serum ferritin < 12 mug/L) was lower in the MM group (44.4%) compared to the FE group (57.4%). By the third trimester, almost half the women were anemic in both groups, and mean Hb (g/L) was lower for the MM group (104.2; 95% CI: 102.5, 106.0) compared to the FE group (108.1; 95% CI: 106.4, 109.8) after adjusting for baseline serum ferritin. In contrast, there were no differences in Hb concentrations at 1 mo postpartum or in mean ferritin and prevalence of iron deficiency at 32 wk gestation and 1 mo postpartum (90.9 and 45.1% for the MM group; 92.6 and 47.3% for the FE group, respectively). In conclusion, rather than improve Hb or iron status relative to FE-only supplements as hypothesized, MM supplements may have slightly reduced Hb concentrations during pregnancy. Neither supplement was able to meet iron needs as evidenced by dramatic increases in anemia and iron deficiency by the end of pregnancy MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 10 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000220681700031 L2 - iron;multivitamin-mineral;supplements;pregnancy;anemia;PERUVIAN WOMEN; PRENATAL IRON; VITAMIN-A; ZINC; TRIAL; MALNUTRITION; DEFICIENCY; ABSORPTION; NUTRITION; COMMUNITY SO - Journal of Nutrition 2004 ;134(4):898-903 12106 UI - 3596 AU - Ramallo-Lopez JM AU - Lede EJ AU - Requejo FG AU - Rodriguez JA AU - Kim JY AU - Rosas-Salas R AU - Dominguez JM AD - UNLP, FCE, Dto Fis, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, IFLP, RA-1900 La Plata, ArgentinaBrookhaven Natl Lab, Dept Chem, Upton, NY 11973, USAInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoDominguez, JM, UNLP, FCE, Dto Fis, POB 67, RA-1900 La Plata, Argentina TI - XANES characterization of extremely nanosized metal-carbonyl subspecies (Me = Cr, Mn, Fe, and Co) confined into the mesopores of MCM-41 materials AB - A study of the stability, local order, and interaction of the surface silanol groups of MCM-41 with transition metal carbonyls M-x(CO)(y). (where M = Cr, Mn, Fe, Co) introduced by a chemical alternative method was performed by X-ray absorption near-edge spectroscopy (XANES). These molecular species, catalytically active for ethylene polymerization reactions, were previously characterized by FTIR and NMR in order to confirm their monodispersion and confined location into the mesopores of the MCM-41 material. Present experimental results indicate the high dispersion of metal species in all cases. Symmetry and stability depend on type of compound, Fe-carbonyl having the lowest stability. Changes in metal coordination and oxidation state are clearly followed by XANES indicating the interaction between sub-carbonyl species and the walls of the mesopores MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000225925100019 L2 - X-RAY-ABSORPTION; MANGANESE HYDROUS OXIDES; MOLECULAR-SIEVES; STRUCTURAL CHEMISTRY; TRANSITION-METALS; EDGE STRUCTURE; FINE-STRUCTURE; SPECTROSCOPY; CATALYSTS; STABILITY SO - Journal of Physical Chemistry B 2004 ;108(52):20005-20010 12107 UI - 6095 AU - Ramaswamy SV AU - Dou SJ AU - Rendon A AU - Yang ZH AU - Cave MD AU - Graviss EA AD - Baylor Coll Med, Dept Pathol, Houston TB Initiat, Houston, TX 77030, USAUniv Hosp Monterrey, Pulm Serv, Universidad Autonomy Nuevo Leon, Mexico City, DF, MexicoUniv Hosp Monterrey, Clin Pathol Lab, Universidad Autonomy Nuevo Leon, Mexico City, DF, MexicoUniv Arkansas Med Sci, Dept Med, Little Rock, AR, USAUniv Arkansas Med Sci, Dept Anat, Little Rock, AR, USAGraviss, EA, Baylor Coll Med, Dept Pathol, Houston TB Initiat, Houston, TX 77030 USA TI - Genotypic analysis of multidrug-resistant Mycobacterium tuberculosis isolates from Monterrey, Mexico AB - Thirty-seven multidrug-resistant and 13 pan-susceptible isolates of Mycobacterium tuberculosis were analysed for the diversity of genotypes associated with known drug-resistance mechanisms. The isolates were obtained from patients attending a university tuberculosis clinic in Monterrey, Mexico. A total of 25 IS61 10-RFLP patterns were obtained from the multidrug-resistant tuberculosis (MDR-TB) isolates. Approximately 65% of the MDR-TB isolates were attributed to secondary resistance. Different drug-susceptibility patterns were seen with the clustered isolates. The percentage of isolates resistant to isoniazid (INH), rifampicin (RIF), ethambutol (EMB) and streptomycin (STR) was 100, 97.3, 48.7 and 67.6, respectively. The most common resistance-associated polymorph isms for the four drugs were as follows: INH, Ser315Thr (67.6%) in katG; RIF, Ser450Leu (41.7%) in rpoB; EMB, Met306IIe/VaI/Leu (66.7 %) in ernbB; and STIR, Lys43Arg (24%) in rpsL. Drug-resistance-associated mutations were similar to changes occurring in isolates from other areas of the world, but unique, previously unreported, mutations in katG (n = 5), rpoB (n = 1) and rrs (n = 3) were also identified MH - Mexico|Distrito Federal MH - USA PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 15 U4 - Microbiology U5 - J;Article AV - English IS - 0022-2615 UR - ISI:000189379900005 L2 - CATALASE-PEROXIDASE GENE; STREPTOMYCIN RESISTANCE; RIFAMPICIN-RESISTANCE; ETHAMBUTOL RESISTANCE; ISONIAZID RESISTANCE; MUTATIONS; RPOB; KATG; POLYMORPHISM; SEQUENCE SO - Journal of Medical Microbiology 2004 ;53(2):107-113 12108 UI - 5484 AU - Ramirez-Bautista A AU - Jimenez-Cruz E AU - Marshall JC AD - Univ Autonoma Hidalgo, CIB, Pachuca 42001, Hidalgo, MexicoBrigham Young Univ, Dept Zool, Provo, UT 84602, USARamirez-Bautista, A, Univ Autonoma Hidalgo, CIB, AP 1-69 Plaza Juarez, Pachuca 42001, Hidalgo, Mexico TI - Comparative life history for populations of the Sceloporus grammicus complex (Squamata : Phrynosomatidae) AB - Teotihuacan population of the Sceloporus grammicus complex wits compared with other previously studied populations (Parque Nacional Zoquiapan [PNZ], Monte Alegre Ajusco [MAA], Pedregal San Angel [PSA], Cantimplora [CA], Capulin, Laguna, Paredon, Michilia, and south Texas) for variations in several life history characteristies (SVL at sexual maturity, reproductive period, ovulation and gestation time, and litter size). Mean body size at sexual maturity of females from Teotihuacan was larger than PNZ, MAA, CA, and Capulin. Reproductive period (vitellogenesis, ovulation, gestation, and birth) for the Teotihuacan population was the shortest of all populations. In the Teotihuacan population, gestation time was similar to the Capulin and MAA populations but was shorter than all other populations except the Michilia population. Embryonic development at ovulation varied among populations, with Teotihuacan and Capulin showing earlier stages (stages 1) at ovulation than all other populations. Teotihuacan, PSA, PNZ, and Texas all showed similar litter size, which were larger than Laguna, Paredon, MAA, Capulin, and CA Populations. Differences in reproductive characteristics of these populations could indicate phylogenetically constrained, reproductively isolated populations, or they may he explained as merely responses to different environments MH - Mexico|Hidalgo MH - USA PB - PROVO: BRIGHAM YOUNG UNIV RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 1527-0904 UR - ISI:000221395500004 L2 - Reptilia;Squamata;Phrynosomatidae;Sceloporus grammicus;reproduction;Mexico;chromosome races;polytypy;RELATIVE CLUTCH MASS; REPRODUCTIVE-BIOLOGY; MEXICAN LIZARD; COMPARATIVE DEMOGRAPHY; CHROMOSOME RACES; HIGH ELEVATION; SAURIA; JARROVI; STRATEGIES; EVOLUTION SO - Western North American Naturalist 2004 ;64(2):175-183 12109 UI - 5995 AU - Ramirez-Hernandez C AU - Hernandez-Vidal G AU - Wong-Gonzalez A AU - Gutierrez-Ornelas E AU - Ackermann MR AU - Ramirez-Romero R AD - Univ Autonoma Nuevo Leon, Fac Med Vet & Zootecn, Dept Pathol, Unidad Mederos, Monterrey 64930, NL, MexicoUniv Autonoma Nuevo Leon, Fac Agron, Dept Nutr, Marin 66700, NL, MexicoIowa State Univ, Coll Vet Med, Dept Vet Pathol, Ames, IA 50011, USARamirez-Romero, R, Univ Autonoma Nuevo Leon, Fac Med Vet & Zootecn, Dept Pathol, Unidad Mederos, Av Lazaro Cardenas 4600, Monterrey 64930, NL, Mexico TI - Mast cell density during initiation and progression of the local Shwartzman reaction AB - Objective and design: To quantify the number of mast cells in the skin of rabbits during initiation and progression of the local Shwartzman reaction. Materials: Thirty New Zealand rabbits were divided in two groups (n = 15/group). One group was subjected to the Shwartzman reaction and the other group served as control. Subsequently, animals were further subdivided in six groups of five animals each according to time of euthanasia. Treatments: The local Shwartzman reaction was induced by two inoculations of Salmonella typhimurium lipopolysaccharide. Preparatory inoculation was given intradermally and, 24 h later, the provocative injection was administered intravenously. Controls were subjected to the same procedure but received saline. After provocative injection animals were killed at 1, 8, and 15 days. Methods: Skin samples were fixed in Carnoy's solution and mast cells were identified employing a low pH toluidine blue stain. Numbers of mast cells were determined per square millimetre and, subsequently, those cells degranulated were identified and quantified to obtain absolute values. A Student's t test was initially used to compare Shwartzman versus controls at each time point. Subsequently, an ANOVA test employing a factorial experiment was used to assess a possible interaction between time of euthanasia and treatments. Results: The values were transformed (natural logarithms) for appropriate statistical comparisons. Independent comparisons at each time point showed that Shwartzman groups had higher numbers of mast cells than controls at 1 and 8 days, but not at 15 days (5.71 +/- 1.00 Vs. 2.40 +/- 0.58, P < 0.005; 3.77 +/- 0.90 Vs. 2.33 +/- 0.56, P < 0. 025, and 2.61 +/- 0.25 Vs. 2.39 +/- 0.39, P > 0.05, respectively). Degranulated cells were numerous in Shwartzman groups, particularly at day 1 (3.48 +/- 0.78) and less obvious at day 8 (0.72 +/- 0.50), but were scarce by day 15 (-0.67 +/- 0.99) as well as controls (-0.68 +/- 0.91). The factorial experiment demonstrated that the Shwartzman reaction and time of euthanasia were independently significant (P < 0.005) but their interaction at day 1 was the major contributor (P < 0.005). Tukey's w pairwise comparisons of means confirmed that the Shwartzman group killed at day 1 was significantly different from the others (P < 0.05). Conclusions: Mast cells significantly increase in the early stages of the local Shwartzman reaction. Thus, mast cells are a highly dynamic cell population, which have a prominent role during the acute phase of this lipopolysaccharide-induced inflammatory reaction but not during healing MH - Mexico|Nuevo Leon MH - USA PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology;Immunology U5 - J;Article AV - English IS - 1023-3830 UR - ISI:000220191900004 L2 - local Shwartzman reaction;mast cells;lipopolysaccharide;HUMAN SKIN; HEALING WOUNDS; DEGRANULATION; INFLAMMATION; EXPRESSION; PROTEIN; ARTHUS SO - Inflammation Research 2004 ;53(3):107-110 12110 UI - 5936 AU - Ramirez-Herrera MT AU - Kostoglodov V AU - Urrutia-Fucugauchi J AD - Calif State Univ Long Beach, Dept Geol Sci, Long Beach, CA 90840, USANatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoRamirez-Herrera, MT, Calif State Univ Long Beach, Dept Geol Sci, 1250 Bellflower Blvd, Long Beach, CA 90840 USA TI - Holocene-emerged notches and tectonic uplift along the Jalisco coast, Southwest Mexico AB - This paper presents the preliminary results from a study of Holocene-emerged shorelines, marine notches, and their tectonic implications along the Jalisco coast. The Pacific coast of Jalisco, SW Mexico, is an active tectonic margin. This coast has been the site of two of the largest earthquakes to occur in Mexico this century: the 1932 (Mw 8.2) Jalisco earthquake and the 1995 (Mw 8.0) Colima earthquake. Measurement and preliminary radiocarbon dating of emergent paleoshorelines along the Jalisco coast provide the first constraints upon the timing for tectonic uplift. Along this coastline, uplifted Holocene marine notches and wave-cut platforms occur at elevations ranging from ca. 1 to 4.5 m amsl. In situ intertidal organisms dated with radiocarbon, the first ever reported for the Jalisco area, provide preliminary results that record tectonic uplift during at least the past 1300 years BP at an average rate of about 3 mm/year. We propose a model in which coseismic subsidence produced by offshore earthquakes is rapidly recovered during the postseismic and interseismic periods. The long-term period is characterized by slow tectonic uplift of the Jalisco coast. We found no evidence of coastal interseismic and long-term subsidence along the Jalisco coast. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000220353100015 L2 - holocene;tectonic uplift;marine notches;coastal tectonics;earthquakes;EASTERN NORTH-ISLAND; 1995 COLIMA-JALISCO; SUBDUCTION ZONE; MARINE TERRACES; RIVERA PLATE; NEW-ZEALAND; COSEISMIC UPLIFT; SOUTHERN MEXICO; OCTOBER 9; EARTHQUAKES SO - Geomorphology 2004 ;58(1-4):291-304 12111 UI - 4912 AU - Ramirez-Mora JC AU - Garcia-Navarrete V AU - Moyao-Garcia D AU - Nava-Ocampo AA AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Mexico City 06720, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaRamirez-Mora, JC, Hosp Infantil Mexico Dr Federico Gomez, Dept Anesthesia & Resp Therapy, Dr Marquez 162, Mexico City 06720, DF, Mexico TI - Prolonged preoperative fasting periods prescribed by residents in pediatric anesthesia MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Anesthesiology;Pediatrics U5 - J;Letter AV - English IS - 1155-5645 UR - ISI:000222607300022 SO - Pediatric Anesthesia 2004 ;14(6):527-528 12112 UI - 5876 AU - Ramirez-Salgado J AU - Djurado E AU - Fabry P AD - ENSEEG, LEPMI, F-38402 St Martin Dheres, FranceIMP, Mexico City 07730, DF, MexicoFabry, P, ENSEEG, LEPMI, BP 75, F-38402 St Martin Dheres, France TI - Synthesis of sodium titanate composites by sol-gel method for use in gas potentiometric sensors AB - Mixtures of Na2Ti3O7/NaTi6O13 and Na2Ti6O13/TiO2 were synthesised by the sol-gel method using alkoxide precursors. XRD and SEM characterisations were performed. Semi -quantitative chemical analyses were carried out and the mixture ratio of Na2Ti3O7/Na2Ti6O13 was 3:1 wt. A qualitative estimation on the mixture Na2Ti6O13/TiO2 gives also a higher ratio. Such composites are well suited to be used directly as oxygen electrode materials in potentiometric gas sensor devices exchanging sodium and oxygen with the surrounding phases. Electrochemical impedance spectroscopy (EIS) was used to measure the total conductivity. A part of electronic conductivity depending on the partial oxygen pressure was observed in the mixture Na2Ti6O13/TiO2 due to the presence of rutile TiO2. (C) 2003 Published by Elsevier Ltd MH - France MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 14 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000220335900035 L2 - ETS;electrode materials;Na2Ti3O7;Na2Ti6O13;TiO2;SEM;sol-gel processes;synthesis;XRD;gas;conductivity;REFERENCE ELECTRODE; TITANIUM-DIOXIDE; METAL TITANATE; OXIDE; PEROVSKITE; SYSTEMS SO - Journal of the European Ceramic Society 2004 ;24(8):2477-2483 12113 UI - 3731 AU - Ramirez-Santiago G AU - Jose JV AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoNortheastern Univ, Dept Phys, Boston, MA 02115, USANortheastern Univ, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115, USARamirez-Santiago, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Phase and charge re-entrant phase transitions in two capacitively coupled Josephson arrays with ultrasmall junctions AB - We have studied the phase diagram of two capacitively coupled Josephson junction arrays with charging energy, E-c, and Josephson coupling energy, E-J. Our results are obtained using a path integral Quantum Monte Carlo algorithm. The parameter that quantifies the quantum fluctuations in the ith array is defined by alpha(i)=E-ci/E-Ji. Depending on the value of alpha(i), each independent array may be in the semiclassical or in the quantum regime: We find that thermal fluctuations are important when alphaless than or similar to1.5 and the quantum fluctuations dominate when 2.0less than or similar toalpha. Vortices are the dominant excitations in the semiclassical limit, while in the quantum regime the charge excitations are important. We have extensively studied the interplay between vortex and charge dominated individual array phases. The phase diagrams for each array as a function of temperature and interlayer capacitance were determined from results for their helicity modulus, Y(alpha), and the inverse dielectric constant, epsilon(-1)(alpha). The two arrays are coupled via the capacitance C-inter at each site of the lattices. When one of the arrays is in the quantum regime and the other one is in the semiclassical limit, Y(T,alpha) decreases with T, while epsilon(-1)(T,alpha) increases. This behavior is due to a duality relation between the two arrays: e.g., a manifestation of the gauge invariant capacitive interaction between vortices in the semiclassical array and charges in the quantum array. We find a re-entrant transition in Y(T,alpha), at low temperatures, when one of the arrays is in the semiclassical limit (i.e., alpha(1)=0.5) and the quantum array has 2.0less than or equal toalpha(2)less than or equal to2.5, for the values considered for the interlayer capacitance of C-inter=0.26087, 0.52174, 0.78261, 1.04348, and 1.30435. Similar results were obtained for larger values of alpha(2)=4.0 with C-inter=1.04348 and 1.30435. For smaller values of C-inter the superconducting-normal transition was not present. In addition, when 3.0less than or equal toalpha(2)<4.0, and for all the interlayer couplings considered above, a novel re-entrant phase transition occurs in the charge degrees of freedom, i.e., there is a re-entrant insulating-conducting transition at low temperatures. Finally, we obtain the corresponding phase diagrams that have some features that resemble those seen in experiment MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000225477000134 L2 - QUANTUM FLUCTUATIONS; 2-DIMENSIONAL ARRAYS; GRANULAR SUPERCONDUCTORS; TUNNEL-JUNCTIONS; VORTEX DYNAMICS; RENORMALIZATION; EQUATIONS; DUALITY; POINT; MODEL SO - Physical Review B 2004 ;70(17): 12114 UI - 5603 AU - Ramirez-Solis A AU - Mukopadhyay R AU - Rosen BP AU - Stemmler TL AD - Wayne State Univ, Sch Med, Dept Biochem & Mol Biol, Detroit, MI 48201, USAUniv Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoStemmler, TL, Wayne State Univ, Sch Med, Dept Biochem & Mol Biol, 540 E Canfield Ave, Detroit, MI 48201 USA TI - Experimental and theoretical characterization of arsenite in water: Insights into the coordination environment of As-O AB - Long-term exposure to arsenic in drinking water has been linked to cancer of the bladder, lungs, skin, kidney, nasal passages, liver, and prostate in humans. It is therefore important to understand the structural aspects of arsenic in water, as hydrated arsenic is most likely the initial form of the metalloid absorbed by cells. We present a detailed experimental and theoretical characterization of the coordination environment of hydrated arsenite. XANES analysis confirms As(III) is a stable redox form of the metalloid in solution. EXAFS analysis indicate, at neutral pH, arsenite has a nearest-neighbor coordination geometry of approximately 3 As-O bonds at an average bond length of 1.77 Angstrom, while at basic pH the nearest-neighbor coordination geometry shifts to a single short As-O bond at 1.69 Angstrom and two longer As-O bonds at 1.82 Angstrom. Long-range ligand scattering is present in all EXAFS samples; however, these data could not be fit with any degree of certainty. There is no XAS detectable interaction between As and antimony, suggesting they are not imported into cells as a multinuclear complex. XAS results were compared to a structural database of arsenite compounds to confirm that a 3 coordinate As-O complex for hydrated arsenite is the predominate species in solution. Finally, quantum chemical studies indicate arsenite in solution is solvated by 3 water molecules. These results indicate As(OH)(3) as the most stable structure existing in solution at neutral pH; thus, ionic As transport does not appear to be involved in the cellular uptake process MH - Mexico|Morelos MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 18 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000221168000029 SO - Inorganic Chemistry 2004 ;43(9):2954-2959 12115 UI - 6282 AU - Ramirez-Solis A AU - Daudey JP AD - Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, MexicoUniv Toulouse 3, CNRS,UMR 5626, IRSAMC, Phys Quant Lab, F-31062 Toulouse, FranceRamirez-Solis, A, Univ Autonoma Estado Morelos, Fac Ciencias, Dept Fis, Cuernavaca 62210, Morelos, Mexico TI - Ab initio study on the spectroscopy of CuCl2. I. Benchmark calculations on the X-2 Pi(g)-(2)Sigma(+)(g) transition AB - The modern theoretical predictions on the LambdaSSigma nature of the ground state of CuCl2 have led to different answers, depending on the type (DFT-based or ab initio) and the quality of the electronic correlation treatment; for this reason the X (2)Pi(g)-(2)Sigma(g)(+) transition energy has been predicted to range from -1856 to +5887 cm(-1). The physical problem at hand lies in the difficulty of accurately describing the orientation of the 3d hole on the central Cu2+(3d(9))/Cu+(3d(9)4s(1)) ion (in the field of both chlorine ions), which implies the need of the most sophisticated nondynamic and dynamic electronic correlation treatments. We report here ab initio benchmark calculations using especially developed basis sets to study, at the CASSCF+CASPT2 and CASSCF+ACPF levels, the transition energy as well as the corresponding equilibrium geometries. The spin-orbit (SO) effects of both atoms were included in a second step through the effective Hamiltonian formalism, using the calibrated SO effective potentials developed by the Stuttgart group. Without SO at the CASSCF+ACPF level, the ground state is X (2)Pi(g) but the vertical transition energy to the (2)Sigma(g)(+) is only 99 cm(-1) at 3.95 a.u. The inclusion of the SO effects leads to a Omega=1/2 (59% (2)Pi(g),41% (2)Sigma(g)(+)) ground state, in contradiction with the Omega experimental value of 3/2. In a last step we show that the SO effects (and therefore the final Omega ordering) are critically dependent on the LambdaSSigma electronic energies, so that it is not impossible that the Omega ordering is actually changed. For theoreticians interest in this matter is not purely academic, since many properties of organometallic complexes are linked to such delicate physical effects. (C) 2004 American Institute of Physics MH - France MH - Mexico|Morelos PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000188880900021 L2 - LASER-INDUCED FLUORESCENCE; FOURIER-TRANSFORM SPECTRA; GROUND-STATE; ELECTRONIC-STRUCTURE; ROVIBRONIC LEVELS; METAL DIHALIDES; PSEUDOPOTENTIALS; ISOTOPOMERS; ELEMENTS; SYSTEM SO - Journal of Chemical Physics 2004 ;120(7):3221-3228 12116 UI - 4889 AU - Ramirez A AU - de Diego JA AU - Dultzin-Hacyan D AU - Gonzalez-Perez JN AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Hamburg, D-21029 Hamburg, GermanyInst Astrofis Canarias, Tenerife 38200, SpainRamirez, A, Univ Nacl Autonoma Mexico, Inst Astron, Apdo 70-264,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Optical variability of PKS 0736+017 AB - We present BVR photometric observations of the blazar PKS 0736+017. These observations were carried out with three telescopes in Mexico and two in Spain between December 1998 and April 2003. PKS 0736+017 shows remarkable variation at different timescales and amplitudes. Maximum brightness was detected on December 19, 2001 (B = 14.90 +/- 0.01, V = 14.34 +/- 0.01, and R = 13.79 +/- 0.01). A peculiar tendency to redden with increased brightness was detected throughout our observations. Moreover, in one season a good correlation between flux level and spectral slope is shown. This anomalous behaviour cannot be described by common flare models of blazars. The flux vs. spectral slope correlation observed in this and other blazars is worth further study MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000222847800014 L2 - Blazar;PKS 0736+017;radiation mechanisms;variability;BL-LACERTAE OBJECTS; EXTRAGALACTIC RADIO-SOURCES; SPECTRAL SLOPE VARIABILITY; FREQUENCY VARIABLE SOURCES; QUASARS PKS 0736+017; MULTIFREQUENCY OBSERVATIONS; HOST GALAXIES; INTRADAY VARIABILITY; LOUD QUASARS; BLAZARS SO - Astronomy & Astrophysics 2004 ;421(1):83-89 12117 UI - 5665 AU - Ramirez AG AU - Lopez RG AU - Tauer K AD - Ctr Invest Quim Aplicada, Saltillo 25100, Coahuila, MexicoMax Planck Inst Colloids & Interfaces, D-14476 Golm, GermanyLopez, RG, Ctr Invest Quim Aplicada, Blvd Enrique Reyna 140, Saltillo 25100, Coahuila, Mexico TI - Studies on semibatch microemulsion polymerization of butyl acrylate: Influence of the potassium peroxodisulfate concentration AB - Semibatch microemulsion polymerization of butyl acrylate in the presence of sodium dodecyl sulfate/Aerosol OT surfactant mixture and potassium peroxodisulfate as initiator is analyzed with respect to particle nucleation and growth. It is concluded that particle nucleation occurs during the whole batch and semibatch polymerization periods also in the absence of micelles. The observed increase in the polymer content compared to the batch microemulsion polymerization is mainly due to nucleation of new particles during the semibatch stage. During the post-addition polymerization period particle growth is dominated by particle coalescence. The particular method of semibatch microemulsion polymerization allows to obtain latexes with particle sizes below 40 nm (dynamic light scattering intensity weighted diameter) at polymer concentrations near to 30 wt % and stabilizer amounts between 5 and 6% relative to the polymer mass MH - Germany MH - Mexico|Coahuila PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000220898600012 L2 - SODIUM DODECYL-SULFATE; AIR-WATER-INTERFACE; EMULSION POLYMERIZATION; ANIONIC MICROEMULSION; VINYL-CHLORIDE; AEROSOL-OT; ADSORPTION; STYRENE; SALT; SPECTROSCOPY SO - Macromolecules 2004 ;37(8):2738-2747 12118 UI - 5203 AU - Ramirez FDM AU - Charbonniere L AU - Muller G AU - Bunzli JCG AD - Swiss Fed Inst Technol, Inst Mol Biol & Chem, CH-1015 Lausanne, SwitzerlandInst Nacl Invest Nucl, Dept Quim, Lerma 52045, Edo Mexico, MexicoCNRS, Ecole Chim Polymeres & Mat, Lab Chim Mol, F-67087 Strasbourg, FranceUniv Minnesota, Dept Chem, Duluth, MN 55812, USABunzli, JCG, Swiss Fed Inst Technol, Inst Mol Biol & Chem, BCH 1402, CH-1015 Lausanne, Switzerland TI - Tuning the stoichiometry of lanthanide complexes with calixarenes: Bimetallic complexes with a calix[6]arene bearing ether-amide pendant arms AB - A de-tert-butylated calix[6]arene (A(6)L(6)) fitted with six ether-amide pendant arms was synthesized and characterized in solution. NMR spectroscopic data point to the six phenoxide units adopting an average D-6h conformation on the NMR time scale. According to MM3 molecular mechanics, and MOPAC quantum mechanical calculations, A(6)L(6) is a ditopic ligand featuring two nonadentate coordination sites, each built from three pendant arms, and extending in opposite directions with one above, and the other under the main ring. A(6)L(6) reacts with Ln(III) ions (Ln = La, Eu) in acetonitrile to successively form 1:1 and 2:1 complexes. The isolated Eu-III 2:1 complex is luminescent (quantum yield: 2.5% in acetonitrile, upon ligand excitation). In the solid state, the luminescence decay is bi-exponential, with lifetimes equal to 1.66 and 0.46 ms (upon direct metal excitation), pointing to the presence of two differently coordinated metal ions, one with essentially no bound water molecules, and the other one with two ligated water molecules. According to molecular mechanics calculations, the more stable isomer is indeed asymmetric with two nine-coordinated metal ions. Both Eu-III ions are bound to three bidentate arms, and one monodentate triflate anion, but one metal ion completes its coordination sphere with two phenoxide oxygen atoms, and the other one with two water molecules, consistent with IR spectroscopic and luminescence data. In acetonitrile solution, the two metal ion sites become equivalent, and the relatively long lifetime (1.35 ms) is indicative of a coordination environment free of water molecules. This work demonstrates, that the stoichiometry of lanthanide complexes with calixarenes can be tuned by a suitable choice of the narrow and/or wide rim substituents. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004 MH - France MH - Mexico|Estado De Mexico MH - Switzerland MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1434-1948 UR - ISI:000222141000021 L2 - lanthanides;calixarenes;europium;luminescence;SOLVENT-EXTRACTION; RARE-EARTH; LOWER RIM; EUROPIUM(III); WATER; IONS; LA; LUMINESCENCE; CHEMISTRY; CAPSULES SO - European Journal of Inorganic Chemistry 2004 ;(11):2348-2355 12119 UI - 3335 AU - Ramirez I AU - Koenigsberger G AU - Kurucz RL AD - UNAM, Inst Astron, Mexico City 04510, DF, Mexico. UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, Mexico. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USA TI - A calibration of FWHM vs. v for UV lines AB - The UV spectra predicted by LTE line-blanketed model atmosphere calculations are used to obtain a preliminary calibration of FWHM vs. v for UV lines, which is then used to determine the values of v sin i for four O-type stars in the Small Magellanic Cloud MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA T3 - STELLAR ROTATIONIau symposia PB - SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - S;Article NT - SEnglishArticle0390 ASHTON AVE, SAN FRANCISCO, CA 94112 USAIAU SYMPBBM41 AV - English IS - 0074-1809 UR - ISI:000226161500003 SO - 2004 ;(215):19-20 12120 UI - 3554 AU - Ramirez JM AU - Tryba AK AU - Pena F AD - Univ Chicago, Dept Organismal Biol & Anat, Comm Neurobiol Computat Neurosci & Mol Med, Chicago, IL 60637, USATexas Tech Univ, Hlth Sci Ctr, Dept Physiol, Lubbock, TX 79430, USACINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoRamirez, JM, Univ Chicago, Dept Organismal Biol & Anat, Comm Neurobiol Computat Neurosci & Mol Med, Chicago, IL 60637 USA TI - Pacemaker neurons and neuronal networks: an integrative view AB - Rhythmically active neuronal networks give rise to rhythmic motor activities but also to seemingly non-rhythmic behaviors such as sleep, arousal, addiction, memory and cognition. Many of these networks contain pacemaker neurons. The ability of these neurons to generate bursts of activity intrinsically lies in voltage- and time-dependent ion fluxes resulting from a dynamic interplay among ion channels, second messenger pathways and intracellular Ca2+ concentrations, and is influenced by neuromodulators and synaptic inputs. This complex intrinsic and extrinsic modulation of pacemaker activity exerts a dynamic effect on network activity. The nonlinearity of bursting activity might enable pacemaker neurons to facilitate the onset of excitatory states or to synchronize neuronal ensembles - an interactive process that is intimately regulated by synaptic and modulatory processes MH - USA MH - Mexico|Distrito Federal PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 46 U4 - Neurosciences U5 - J;Review AV - English IS - 0959-4388 UR - ISI:000225988600002 L2 - RESPIRATORY RHYTHM GENERATION; PRE-BOTZINGER COMPLEX; HYPERPOLARIZATION-ACTIVATED CURRENT; LOBSTER STOMATOGASTRIC GANGLION; CENTRAL PATTERN GENERATORS; OSCILLATIONS IN-VITRO; INTERNEURON DIVERSITY; INSPIRATORY NEURONS; MEMBRANE-PROPERTIES; PYLORIC NETWORK SO - Current Opinion in Neurobiology 2004 ;14(6):665-674 12121 UI - 3882 AU - Ramirez LM AU - Almanza E AU - Murr LE AD - Univ Texas, Dept Met & Mat Engn, El Paso, TX 79968, USAInst TEcnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, MexicoMurr, LE, Univ Texas, Dept Met & Mat Engn, El Paso, TX 79968, USA TI - Effect of uniaxial deformation to 50% on the sensitization process in 316 stainless steel AB - The effect of uniaxial deformation to 50% on the degree of sensitization (DOS) in 316 stainless steel was investigated at 625 and 670 degreesC for 5-100 It using the electrochemical potentiokinetic reactivation (EPR) test. The results showed that the deformation accelerated the sensitization/desensitization process, especially at 670 degreesC. However, the material is still sensitized after up to 100 h of aging time. Transmission electron microscopy was used to corroborate these results. The deformed material showed more carbide precipitates (Cr23C6) at the grain boundaries and twin intersections than did the nondeformed material. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Coahuila MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 1044-5803 UR - ISI:000225127100010 L2 - 316 stainless steel;EPR;sensitization;carbide precipitates;grain boundaries;TYPE-304 STAINLESS-STEEL; CONTINUOUS COOLING SENSITIZATION; PRIOR COLD WORK; CORROSION; STRAIN SO - Materials Characterization 2004 ;53(1):79-82 12122 UI - 3530 AU - Ramirez MA AU - Trapaga G AU - McKelliget J AD - CINVESTAV, Unidad Queretaro, Queretaro 76230, Qro, MexicoInst Tecnol Morelia, Met Grad Ctr, Morelia 58120, Michoacan, MexicoUniv Massachusetts Lowell, Dept Mech Engn, Lowell, MA 01854, USATrapaga, G, CINVESTAV, Unidad Queretaro, Libramiento Norponiente 2000, Queretaro 76230, Qro, Mexico TI - A comparison between different numerical formulations for welding arc representations AB - A mathematical model was developed to simulate gas tungsten arc welding (GTAW) in order to compare two distinct numerical formulations to represent the electromagnetic problem in arc welding operations, i.e. the "potential" and the "magnetic" approaches. Both formulations, representing the same physics but mathematically and numerically different, are tested against each other and against experimental measurements and other numerical studies reported in the literature. In general, the magnetic approach seems to be easier to implement but the potential approach shows superiority predicting isotherms, current and heat flux densities at the anode. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Michoacan MH - Mexico|Queretaro MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Industrial;Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0924-0136 UR - ISI:000225845800081 L2 - gas tungsten arc welding;mathematical modelling;fluid flow;heat transfer SO - Journal of Materials Processing Technology 2004 ;155-56():1634-1640 12123 UI - 6148 AU - Ramirez MI AU - Castellanos-Juarez FX AU - Yasbin RE AU - Pedraza-Reyes M AD - Univ Guanajuato, Fac Chem, Inst Invest Biol Expt, Guanajuato 36050, Gto, MexicoUniv Texas, Dept Mol & Cell Biol, Richardson, TX 75083, USAPedraza-Reyes, M, Univ Guanajuato, Fac Chem, Inst Invest Biol Expt, Bldg L,Noria Alta S-N,POB 187, Guanajuato 36050, Gto, Mexico TI - The ytkD (mutTA) gene of Bacillus subtilis encodes a functional antimutator 8-oxo-(dGTP/GTP)ase and is under dual control of sigma A and sigma F RNA polymerases AB - The regulation of expression of ytkD, a gene that encodes the first functional antimutator 8-oxo-dGTPase activity of B. subtilis, was studied here. A ytkD-lacZ fusion integrated into the ytkD locus of wild-type B. subtilis 168 revealed that this gene is expressed during both vegetative growth and early stages of sporulation. In agreement with this result, ytkD mRNAs were detected by both Northern blotting and reverse transcription-PCR during both developmental stages. These results suggested that ytkD is transcribed by the sequential action of RNA polymerases containing the sigma factors sigma(A) and or sigma(F), respectively. In agreement with this suggestion, the spore-associated expression was almost completely abolished in a sigF genetic background but not in a B. subtilis strain lacking a functional sigG gene. Primer extension analysis mapped transcriptional start sites on mRNA samples isolated from vegetative and early sporulating cells of B. subtilis. Inspection of the sequences lying upstream of the transcription start sites revealed the existence of typical sigma(A)- and sigma(F)-type promoters. These results support the conclusion that ytkD expression is subjected to dual regulation and suggest that the antimutator activity of YtkD is required not only during vegetative growth but also during the early sporulation stages and/or germination of B. subtilis. While ytkD expression obeyed a dual pattern of temporal expression, specific stress induction of the transcription of this gene does not appear to occur, since neither oxidative damage (following either treatment with paraquat or hydrogen peroxide) nor mitomycin C treatment or sigma(B) general stress inducers (sodium chloride, ethanol, or heat) affected the levels of the gene product produced MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000189117800017 L2 - ALKYL HYDROPEROXIDE REDUCTASE; NUCLEOSIDE TRIPHOSPHATE PYROPHOSPHOHYDROLASE; FORESPORE-SPECIFIC EXPRESSION; PEROXIDE STRESS GENES; HYDROGEN-PEROXIDE; OXIDATIVE STRESS; ESCHERICHIA-COLI; DNA-DAMAGE; SUPEROXIDE-DISMUTASE; NUCLEOTIDE-SEQUENCE SO - Journal of Bacteriology 2004 ;186(4):1050-1059 12124 UI - 5465 AU - Ramirez N AU - Melgoza LM AU - Kuentz M AU - Sandoval H AU - Caraballo I AD - Univ Sevilla, Dept Farm & Tecnol Farmaceut, E-41012 Seville, SpainF Hoffmann La Roche & Co Ltd, CH-4070 Basel, SwitzerlandUniv Autonoma Metropolitana Xochimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoCaraballo, I, Univ Sevilla, Dept Farm & Tecnol Farmaceut, E-41012 Seville, Spain TI - Comparison of different mathematical models for the tensile strength-relative density profiles of binary tablets AB - During the last decade the evolution of the pharmaceutical dosage form design has been important. In controlled release matrix tablets, the tensile strength is an essential parameter to consider, because a minimal mechanical strength is needed for tablet production, handling and avoidance of any dose dumping during its use. Recent developments in percolation theory led to the theoretical proposal of lattice strength that was applied to the tensile strength of tablets. This mechanical property was described as a power law of the relative density involving a critical value that corresponds to the percolation threshold. The objective of the present work is to estimate these mechanical thresholds in KCI-Ethocel((R))100 tablets that were manufactured from different sieve fractions (100-150, 150-200, 250-300 mum). Three power law models are compared regarding the best fit of the tensile strength-relative density profiles. The main criteria for this choice are the Akaike's Information Criterion (AIC), the analysis of the residuals in conjunction with the soundest physical meaning of the models. Accordingly, a power law model was chosen that assumes an initial strength parameter. No correlation could be established between the different mixture ratios or sieve fractions with the critical relative densities. The study showed that an equation based on percolation theory can adequately model tablet strength-density profiles from matrix tablets. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0928-0987 UR - ISI:000221502500002 L2 - percolation theory;percolation threshold;inert matrix;relative density;tensile strength;crushing force;Akaike's Information Criterion;potassium chloride;Ethocel((R)) 100;MATRICES SO - European Journal of Pharmaceutical Sciences 2004 ;22(1):19-23 12125 UI - 5712 AU - Ramirez RG AU - Haenlein GFW AU - Garcia-Castillo CG AU - Nunez-Gonzalez MA AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, San Nicolas De Los Garza 66450, NL, MexicoUniv Delaware, Dept Anim & Food Sci, Newark, DE 19717, USAUniv Autonoma Chiapas, Dept Anim Prod, Tapachula, Chis, MexicoRamirez, RG, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Apartado Postal 142,Sucursal F, San Nicolas De Los Garza 66450, NL, Mexico TI - Protein, lignin and mineral contents and in situ dry matter digestibility of native Mexican grasses consumed by range goats AB - Native grasses from northeastern Mexico, such as Aristida spp., Bouteloua gracilis (Thurb), Cenchrus incertus (M.A. Curtis), Hilaria berlangeri (Steud. Nash), Panicum hallii (Varsey), Setaria macrostachya (H.B.K.), and Cenchrus ciliaris (L.), an introduced grass, that are consumed by range goats were evaluated to estimate seasonal CP, lignin, Ca, P, K, Mg, Na, Cu, Fe, Zn, Mn contents, and the rate and extent of DM digestion. The in situ nylon bag technique was used to estimate effective digestibility/degradability of DM (EDDM). Potential mineral intake by an adult range goat consuming these grasses was also estimated. The CP content in all grasses was significantly different between seasons. P hallii had high annual mean CP contents (12%) and Aristida spp. (6%) was low. The native grasses B. gracilis (9%, annual mean), S. macrostachya (10%) and C. incertus (8%) had CP values comparable to the introduced grass C. ciliaris (9%). Lignin contents in all grasses were also significantly different between seasons. Aristida spp. had high annual means (10%) and H. berlangeri was low (6%). With the exception of H. berlangeri, all grasses had higher lignin contents (annual means) than C. ciliaris (6%). The EDDM in all grasses was significantly different between seasons. C. incertus (45%, annual mean) had the highest EDDM, while Aristida spp. (26%) was lowest. During spring and autumn, EDDM in all grasses was higher than in the other seasons. P. hallii, H. berlangeri and C. incertus had comparable EDDM values to C. ciliaris (40%) in all seasons. It was estimated that an adult range goat consuming the studied grasses, could eat sufficient amounts of Ca, Fe, and K (except for K from Aristida spp. in winter and summer), but of Na, Zn and Mn only in spring and autumn, and of Cu only in autumn. The P and Mg contents were marginally deficient in most grasses and in all seasons. The native grasses P. hallii, S. macrostachya, B. gracilis can be considered valuable grasses for goats on the range, because of their relatively high CP contents, and C. incertus, P. hallii and H. berlangeri because of their relatively high EDDM values, comparable to C ciliaris. However, range goats consuming these grasses need to be supplemented with P and Mg in all seasons, with Na, Zn and Mn in winter and summer, and Cu in winter, spring and summer seasons. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Chiapas MH - Mexico|Nuevo Leon MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0921-4488 UR - ISI:000220840100010 L2 - Mexican native grasses;Cenchrus incertus;Bouteloua gracilis;Panicum hallii;Aristida spp.;Hilaria berlangeri;Setaria macrostachya;Cenchrus ciliaris;mineral intake;potential mineral deficiencies;Spanish range goats;protein contents;lipnin contents;effective degradability of dry matter;NORTHEASTERN MEXICO; DEGRADABILITY; NUTRIENT; RUMEN SO - Small Ruminant Research 2004 ;52(3):261-269 12126 UI - 4677 AU - Ramon F AU - Hernandez-Falcon J AU - Nguyen B AU - Bullock TH AD - Natl Autonomous Univ Mexico, Fac Med, Div Posgrado & Invest, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Dept Neurosci, La Jolla, CA 92093, USAUniv Calif San Diego, Scripps Inst Oceanog, Neurobiol Unit, La Jolla, CA 92093, USARamon, F, Natl Autonomous Univ Mexico, Fac Med, Div Posgrado & Invest, Apartado Postal 70-203,Adm 70,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Slow wave sleep in crayfish AB - Clear evidence of sleep in invertebrates is still meager. Defined as a distinct state of reduced activity, arousability, attention, and initiative, it is well established in mammals, birds, reptiles, and teleosts. It is commonly defined by additional electroencephalographic criteria that are only well established in mammals and to some extent in birds. Sleep states similar to those in mammals, except for electrical criteria, seem to occur in some invertebrates, based on behavior and some physiological observations. Currently the most compelling evidence for sleep in invertebrates (evidence that meets most standard criteria for sleep) has been obtained in the fruit fly Drosophila melanogaster. However, in mammals, sleep is also characterized by a brain state different from that at rest but awake. The electrophysiological slow wave criterion for this state is not seen in Drosophila or in honey bees. Here, we show that, in crayfish, a behavioral state with elevated threshold for vibratory stimulation is accompanied by a distinctive form of slow wave electrical activity of the brain, quite different from that during waking rest. Therefore, crayfish can attain a sleep state comparable to that of mammals MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 8 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000223276700059 L2 - OMITTED STIMULUS POTENTIALS; DROSOPHILA; STATE; REST SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(32):11857-11861 12127 UI - 2992 AU - Ramos-Casals M AU - Jara LJ AU - Medina F AU - Brito-Zeron P AU - Garcia-Carrasco M AU - Rosas J AU - Anaya JM AU - Font J AD - Hosp Clin Barcelona, Dept Autoimmune Dis, Barcelona, SpainCtr Med Nacl Siglo XXI Hosp, Dept Rheumatol, Mexico City, DF, MexicoLa Raza Med Ctr, Dept Rheumatol, Mexico City, DF, MexicoVial Joiosa Hosp, Rheumatol Unit, Alacent, SpainPontif Bolivian Univ, Rheumatol Unit, Medellin, Colombia TI - Two differentiated patterns of association between systemic lupus erythematosus and hepatitis C virus: Description of 42 patients from the Hispamec registry MH - Colombia MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551500719 SO - Annals of the Rheumatic Diseases 2004 ;63():217-217 12128 UI - 2994 AU - Ramos-Casals M AU - Loustaud-Ratti V AU - De Vita S AU - Zeher M AU - Bosch JA AU - Toussirot E AU - Medina F AU - Rosas J AU - Anaya JM AD - Hosp Clin Barcelona, Dept Autoimmune Dis, E-08036 Barcelona, SpainLimoges Hosp, Dept Internal Med, Limoges, FranceUniv Udine, Dept Rheumatol, I-33100 Udine, ItalyUniv Debrecen, Dept Internal Med 3, Div Clin Immunol, Debrecen, HungaryHosp Gen Valle Hebron, Dept Internal Med, Barcelona, SpainJean Minjoz Univ Hosp, Dept Rheumatol, Besancon, FranceCtr Med Nacl Siglo XXI Hosp, Dept Rheumatol, Mexico City, DF, MexicoVila Joiosa Hosp, Rheumatol Unit, Alacant, SpainPontificia Bolivian Univ, Rheumatol Unit, Medellin, Colombia TI - Sjogren syndrome secondary to hepatitis C virus: A multicenter analysis of 137 cases MH - Colombia MH - France MH - Hungary MH - Italy MH - Mexico|Distrito Federal MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000224551501175 SO - Annals of the Rheumatic Diseases 2004 ;63():349-349 12129 UI - 5823 AU - Ramos-Casals M AU - Brito-Zeron P AU - Garcia-Carrasco M AU - Font J AD - Univ Barcelona, Hosp Clin, IDIBAPS,Dept Autoimmune Dis, Serv Malaties Autoimmunes, E-08036 Barcelona, SpainUniv Autonoma Puebla, Sch Med, Dept Rheumatol, Puebla 72570, MexicoRamos-Casals, M, Univ Barcelona, Hosp Clin, IDIBAPS,Dept Autoimmune Dis, Serv Malaties Autoimmunes, C Villarroel 170, E-08036 Barcelona, Spain TI - Sarcoidosis or Sjogren syndrome? Clues to defining mimicry or coexistence in 59 cases AB - We present 5 new cases of coexisting sarcoidosis and Sjogren syndrome (SS) and review the literature for additional cases in order to analyze the clinical, immunologic, and histologic characteristics that may help physicians differentiate the mimicry of SS by sarcoidosis from a. true -coexistence of both autoimmune diseases. We considered the coexistence of sarcoidosis with SS to be when patients presented specific histologic patterns of both diseases, simultaneously or at different times. Fifty-nine patients were included in the analysis (54 identified in the literature search plus our 5 unpublished cases): 49 (83%) patients were female and 10 (17%) were male, with a mean age at diagnosis of 50 years. According to the histopathologic examination of the exocrine glands performed in 53 cases, we defined coexistence of sarcoidosis and SS in 28 cases, while in the remaining 25 patients, sarcoidosis mimicked SS. Clues to identifying when sarcoidosis coexists with SS were a higher prevalence of systemic manifestations (arthritis and uveitis) and positive immunologic parameters (antinuclear antibodies, rheumatoid factor, and anti-Ro/SS-A), as well as the existence of a focal sialadenitis (Chisholm-Mason score grades III-IV, with a CD4+ lymphocytic infiltration) in the salivary gland biopsy. In patients first diagnosed with primary SS, the appearance of some clinical features such as hilar adenopathies, uveitis, or hypercalcemia leads to the diagnosis of coexisting sarcoidosis. A careful application of the new American-European consensus criteria had a sensitivity of 93% and a specificity of 92% in identifying when SS coexists with sarcoidosis. In conclusion, the association of sarcoidosis with SS leads to a true coexistence of both diseases in more than half the patients described in the literature, while in the remaining patients, sarcoidosis mimics SS. In light of these results, sarcoidosis should not be considered as an exclusion criterion for the diagnosis of SS, and in patients with a suspected overlap of the two diseases, application of the new American-European consensus criteria for diagnosis of SS should be mandatory MH - Mexico|Puebla MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 14 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0025-7974 UR - ISI:000220605600001 L2 - SICCA-SYNDROME; DISEASE; GLAND; PATIENT; CLASSIFICATION; THYROIDITIS; PATTERNS; CRITERIA; BIOPSY SO - Medicine 2004 ;83(2):85-95 12130 UI - 5944 AU - Ramos-Casals M AU - Cervera R AU - Lagrutta M AU - Medina F AU - Garcia-Carrasco M AU - de la Red G AU - Bove A AU - Ingelmo M AU - Font J AD - Univ Barcelona, Hosp Clin, Serv Malalties Autoimmunes,Dept Autoimmune Dis, Inst Invest Biomed August Pi & Sunyer, E-08036 Barcelona, SpainHosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Dept Rheumatol, Mexico City, DF, MexicoRamos-Casals, M, Univ Barcelona, Hosp Clin, Serv Malalties Autoimmunes,Dept Autoimmune Dis, Inst Invest Biomed August Pi & Sunyer, C Villarroel 170, E-08036 Barcelona, Spain TI - Clinical features related to antiphospholipid syndrome in patients with chronic viral infections (hepatitis C virus/HIV infection): Description of 82 cases AB - We analyzed the spectrum of clinical features related to antiphospholipid syndrome (APS) in patients with chronic viral infections, such as hepatitis C virus (HCV) infection and human immunodeficiency virus (HIV) infection. We selected patients from the HISPAMEC registry who repeatedly tested positive for antiphospholipid antibodies (aPL) and who had features of APS, and we searched the MEDLINE database for additional cases. A total of 82 patients were included (45 had chronic HCV infection, 32 had HIV infection, and 5 had HCV-HIV coinfection). The main features of APS were avascular bone necrosis (20 patients), peripheral thrombosis (17), thrombocytopenia (15), neurologic features (13), cardiac manifestations (12), pulmonary embolism (9), gastrointestinal manifestations (8), and cutaneous manifestations (8). The main APS-related features in HCV-infected patients were intraabdominal thrombosis and myocardial infarction, whereas, in HIV-infected patients, the main features were avascular bone and cutaneous necrosis. These viruses might act in some patients as chronic triggering agents that induce a heterogeneous, atypical presentation of APS MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1058-4838 UR - ISI:000220338500023 L2 - SYSTEMIC-LUPUS-ERYTHEMATOSUS; ACQUIRED-IMMUNODEFICIENCY-SYNDROME; INTERNATIONAL CONSENSUS STATEMENT; ANTICARDIOLIPIN ANTIBODIES; AVASCULAR NECROSIS; CLASSIFICATION CRITERIA; AUTOIMMUNE-DISEASES; HIV; MANIFESTATIONS; ANTICOAGULANT SO - Clinical Infectious Diseases 2004 ;38(7):1009-1016 12131 UI - 5984 AU - Ramos-Casals M AU - Trejo O AU - Garcia-Carrasco M AU - Cervera R AU - de la Red G AU - Gil V AU - Lopez-Guillermo A AU - Ingelmo M AU - Font J AD - Univ Barcelona, Hosp Clin, Serv Malalties Autoimmunes, Dept Autoimmuno Dis,IDIBAPS, E-08036 Barcelona, SpainUniv Barcelona, Hosp Clin, Serv Malalties Autoimmunes, Dept Hematol,IDIBAPS, E-08036 Barcelona, SpainUniv Barcelona, Barcelona, SpainBenemerita Univ Autonoma Puebla, Rheumatol Unit, Puebla, MexicoRamos-Casals, M, Univ Barcelona, Hosp Clin, Serv Malalties Autoimmunes, Dept Autoimmuno Dis,IDIBAPS, C Villarroel 170, E-08036 Barcelona, Spain TI - Triple association between hepatitis C virus infection, systemic autoimmune diseases, and B cell lymphoma AB - Objective. To analyze the clinical characteristics of patients from a Department of Autoimmune Diseases presenting chronic hepatitis C virus (HCV) infection, systemic autoimmune disease, and B cell lymphoma. Methods. We analyzed the records of 100 consecutive patients with systemic autoimmune diseases and associated HCV infection seen in our department between 1994 and 2000. We retrospectively investigated the development of B cell malignancies after the diagnosis of HCV related autoimmune disease. Results. Six patients with HCV related systemic autoimmune disease presented B cell non-Hodgkin's lymphoma (NHL). These patients fulfilled the diagnostic criteria for Sjogren's syndrome (n = 4) and polyarteritis nodosa (PAN; n = 2). Four patients were female and 2 male, with a mean age at lymphoma diagnosis of 62 years (range 45-78). The main immunologic markers were hypocomplementemia in all patients and cryoglobulinemia in 5 (83%). Primary extranodal localization of lymphoma was observed in 3 (50%) patients: prostate (n = 1), liver and ovary (n = 1), and ocular annexa (n = 1). Clinically, NHL was classified as indolent lymphoma in 3 patients and aggressive lymphoma in 3. NHL histologic types were diffuse large cell lymphoma (n = 4), extranodal marginal zone B cell lymphoma (n = 1), MALT lymphoma (n = 1), and lymphoplasmacytic lymphoma (n = 1). Conclusion. We describe 6 patients with a triple association of HCV infection, systemic autoimmune disease, and NHL. Characteristics of these patients included a high prevalence of cryoglobulinemia (that clearly contributes to fulfilment of diagnostic criteria for PAN) and an elevated frequency of primary extranodal involvement. We recommend careful evaluation of patients with B cell NHL to detect silent autoimmune or chronic viral diseases. This triple association reinforces the suspected links between autoimmunity, infection, and cancer MH - Mexico|Puebla MH - Spain PB - TORONTO: J RHEUMATOL PUBL CO RP - NOT IN FILE U3 - TC 23 U4 - Rheumatology U5 - J;Article AV - English IS - 0315-162X UR - ISI:000220148700016 L2 - cryoglobulinemia;B cell lymphoma;systemic lupus erythematosus;Sjogren's syndrome;hepatitis C virus;polyarteritis nodosa;NON-HODGKINS-LYMPHOMAS; SJOGRENS-SYNDROME; LYMPHOPROLIFERATIVE DISEASES; MIXED CRYOGLOBULINEMIA; CRITERIA; CLASSIFICATION; PREVALENCE; FRANCE; LIVER SO - Journal of Rheumatology 2004 ;31(3):495-499 12132 UI - 6646 AU - Ramos-Fernandez G AU - Mateos JL AU - Miramontes O AU - Cocho G AU - Larralde H AU - yala-Orozco B AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoUniv Calif Santa Cruz, Dept Environm Studies, Santa Cruz, CA 95064, USAUniv Nacl Autonoma Mexico, Inst Fis, Dipartimento Sistemas Complejos, Mexico City 01000, DF, MexicoRamos-Fernandez, G, Pronatura Peninsula Yucatan, Calle 17 188A 10,Col Garcia Gineres, Merida 97070, Yucatan, Mexico TI - Levy walk patterns in the foraging movements of spider monkeys (Ateles geoffroyi) AB - Scale invariant patterns have been found in different biological systems, in many cases resembling what physicists have found in other, nonbiological systems. Here we describe the foraging patterns of free-ranging spider monkeys (Ateles geoffroyi) in the forest of the Yucatan Peninsula, Mexico and find that these patterns closely resemble what physicists know as Levy walks. First, the length of a trajectory's constituent steps, or continuous moves in the same direction, is best described by a power-law distribution in which the frequency of ever larger steps decreases as a negative power function of their length. The rate of this decrease is very close to that predicted by a previous analytical Levy walk model to be an optimal strategy to search for scarce resources distributed at random. Second, the frequency distribution of the duration of stops or waiting times also approximates to a power-law function. Finally, the mean square displacement during the monkeys' first foraging trip increases more rapidly than would be expected from a random walk with constant step length, but within the range predicted for Levy walks. In view of these results, we analyze the different exponents characterizing the trajectories described by females and males, and by monkeys on their own and when part of a subgroup. We discuss the origin of these patterns and their implications for the foraging ecology of spider monkeys MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Yucatan MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 38 U4 - Behavioral Sciences;Ecology;Zoology U5 - J;Article AV - English IS - 0340-5443 UR - ISI:000187503600002 L2 - animal movement;spider monkeys;Levy walks;scale invariance;foraging;SPATIAL MEMORY; SEED DISPERSAL; SCALE; DYNAMICS; ECOLOGY; SIZE SO - Behavioral Ecology and Sociobiology 2004 ;55(3):223-230 12133 UI - 4061 AU - Ramos-Ortiz G AU - Cha M AU - Kippelen B AU - Walker GA AU - Barlow S AU - Marder SR AD - Ctr Invest Opt AC, Leon 37000, Gto, MexicoGeorgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332, USAUniv Arizona, Dept Chem, Tucson, AZ 85721, USAGeorgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332, USAUniv Arizona, Ctr Opt Sci, Tucson, AZ 85721, USAPusan Natl Univ, Res Ctr Dielect & Adv Matter Phys, Pusan 609735, South KoreaKippelen, B, Ctr Invest Opt AC, A-P 1-948, Leon 37000, Gto, Mexico TI - Direct imaging through scattering media by use of efficient third-harmonic generation in organic materials AB - We report on real-time, time-gated, direct imaging through scattering media with an attenuation of 14 mean-free paths by use of third-harmonic generation in the eye-safe and telecommunication-compatible near-IR spectral region (1550 nm). (C) 2004 Optical Society of America MH - Mexico|Guanajuato MH - South Korea MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000224600000019 L2 - ULTRAFAST SO - Optics Letters 2004 ;29(21):2515-2517 12134 UI - 4894 AU - Ramos-Ortiz G AU - Cha M AU - Thayumanavan S AU - Mendez JC AU - Marder SR AU - Kippelen B AD - Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721, USAUniv Arizona, Dept Chem, Tucson, AZ 85721, USACALTECH, Beckman Inst, Pasadena, CA 91125, USAGeorgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332, USAGeorgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332, USACtr Invest Opt AC, Leon 37000, Gto, MexicoPusan Natl Univ, Res Ctr Dielect & Advance Matter Phys, Pusan 609735, South KoreaKippelen, B, Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721, USA TI - Third-order optical autocorrelator for time-domain operation at telecommunication wavelengths AB - We report on amorphous organic thin films that exhibit efficient third-harmonic generation at telecommunication wavelengths. At 1550 nm, micrometer-thick samples generate up to 17 muW of green light with input power of 250 mW delivered by an optical parametric oscillator. This high conversion efficiency is achieved without phase matching or cascading of quadratic nonlinear effects. With these films, we demonstrate a low-cost, sensitive third-order autocorrelator that can be used in the time-frequency domain. (C) 2004 American Institute of Physics MH - Mexico|Guanajuato MH - South Korea MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000222784300007 L2 - GENERATION; PHOTODIODE; PULSES SO - Applied Physics Letters 2004 ;85(2):179-181 12135 UI - 5471 AU - Ramos-Remus CR AU - Hunsche E AU - Mavros P AU - Querol J AU - Suarez R AD - Merck & Co Inc, Whitehouse Stn, NJ 08889, USAInst Mexicana Seguro Social, Guadalajara, Jalisco, MexicoMerck Sharp & Dohme Mexico SA CV, Mexico City, DF, MexicoHunsche, E, Merck & Co Inc, WS2E-76,1 Merck Dr,POB 100, Whitehouse Stn, NJ 08889 USA TI - Evaluation of quality of life following treatment with etoricoxib in patients with arthritis or low-back pain: an open label, uncontrolled pilot study in Mexico AB - An open-label study was undertaken at multiple centers in Mexico to assess the impact of treatment with etoricoxib - a selective cyclooxygenase-2 (COX-2) inhibitor - on quality of life (QoL) and pain relief among patients with osteoarthritis (OA), rheumatoid arthritis (RA) or chronic low-back pain (CLBP). The study involved 191 adult patients (aged greater than or equal to 18 years old) who had used non-selective non-steroidal anti-inflammatory drugs (NSAIDs) for the treatment of CA, RA or CLBP during the month prior to study enrolment. After discontinuation of prior therapy, patients were treated with etoricoxib 60 mg for OA and CLBP, or 90 mg for RA once daily for 2 weeks. Patient and physician questionnaires were used to collect information about drug treatments, patients' QoL (Short Form-8 Health Survey [SF8(TM)] and EQ-5D VAS), patients' pain assessment, and physicians' and patients' satisfaction with treatment at baseline and at follow-up visits. Relative to prior NSAID use, etoricoxib use was associated with improvements in all SF-8 QoL domains and component scores as well as in measures of pain and physical functioning. Current pain was reduced from 59.1 mm (0-100 mm VAS) at baseline to 27.1 mm at follow-up and the physical component score of the SF-8 improved from 33.3 to 46.3 (on a scale from 0 to 100). At follow-up, 91% of patients were satisfied with the pain control provided by etoricoxib compared with 34% who were satisfied with the pain control provided by previous NSAIDs. Among physicians, 93% reported satisfaction with the analgesic effect, 95% with the anti-inflammatory profile, and 82% with the side-effect profile of etoricoxib relative to pre-study NSAID treatment. During etoricoxib therapy, use of concomitant medications was reduced. The results of this study are limited due to the lack of a control group, the un-blinded design, and the small number of patients. Large naturalistic trials are needed to confirm the results MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - USA PB - NEWBURY: LIBRAPHARM RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0300-7995 UR - ISI:000221569100016 L2 - etoricoxib;NSAID;ProExp;quality of life;satisfaction;HEALTH-STATUS; DOUBLE-BLIND; TRIAL; OSTEOARTHRITIS; INHIBITOR; PROFILE SO - Current Medical Research and Opinion 2004 ;20(5):691-698 12136 UI - 4393 AU - Ramos E AU - Storey BD AU - Sierra F AU - Zuniga RA AU - Avramenko A AD - Univ Texas, Ctr Nonlinear Dynam, Austin, TX 78712, USAFranklin W Olin Coll Engn, Needham, MA 02492, USAUNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoRamos, E, Univ Texas, Ctr Nonlinear Dynam, Austin, TX 78712, USA TI - Temperature distribution in an oscillatory flow with a sinusoidal wall temperature AB - The temperature field generated by an oscillatory boundary layer flow in the presence of a wall with a sinusoidal temperature distribution is analyzed. A linear perturbation method is used to find closed form analytical solutions for the temperature field when the amplitude of the velocity oscillation is small. The analytical solutions only consider longtime behavior when the temperature fields oscillate with the frequency of the flow. The structure of the equation that governs the temperature correction due to convection is similar to that of diffusive waves with the solution consisting of traveling or standing waves. The temperature distribution is also solved numerically which allows a description of the transient and periodic temperature fields. At short times, the solution has similarities with the traveling waves, while at long times the solution evolves toward a standing wave. As the amplitude of the solution is increased, beyond the linear approximation, the temperature oscillation remains periodic, but more Fourier modes are incorporated. We find that in all cases, the long-time, time averaged heat transfer from the boundary to the fluid is zero. (C) 2004 Published by Elsevier Ltd MH - Mexico|Morelos MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Engineering, Mechanical;Mechanics U5 - J;Article AV - English IS - 0017-9310 UR - ISI:000224001700021 L2 - HEAT-TRANSFER; RECIPROCATING FLOW; PIPE; CONVECTION; CHANNELS; PLATE SO - International Journal of Heat and Mass Transfer 2004 ;47(22):4929-4938 12137 UI - 5577 AU - Ramos G AU - Pezet-Valdez M AU - O'Connor-Sanchez A AU - Placencia C AU - Pless RC AD - IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro 76040, MexicoIPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Queretaro 11500, MexicoCICY, Unidad Biotecnol, Merida 97200, Yucatan, VenezuelaPless, RC, IPN, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Unidad Queretaro,Jose Siurob 10,Col Alameda, Queretaro 76040, Mexico TI - Hydration rates for various types of Mexican maize based on single-kernel measurements AB - Hydration kinetics for sound maize kernels in liquid water, determined by single-kernel measurements for three different Mexican maize types, yielded water diffusion coefficients ordered as Celaya corn > Toluca corn > Palomero corn, at all temperatures examined. These diffusion coefficients are lower than those reported earlier for maize grains, possibly due to the fact that in the present study damaged kernels were rigorously excluded. The energies of activation determined from the Arrhenius plots were ordered as Palomero corn > Celaya corn = Toluca corn and were similar in value to those reported earlier for other maize types. Damage to the surface of the maize kernels during the hydration experiments occurs at a significant frequency. Even minor surface lacerations can strongly affect the rate of hydration of the kernels. Experiments with maize grains selectively varnished in various parts of their surface show that the entry of water into the kernels occurs predominantly through the pericarp, not through the tip cap, though the tip cap has a higher water inflow per unit area MH - Mexico|Queretaro MH - Venezuela PB - ST PAUL: AMER ASSOC CEREAL CHEMISTS RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0009-0352 UR - ISI:000221265800002 L2 - WATER-ABSORPTION; DIFFUSION-COEFFICIENTS; MOISTURE DIFFUSION; CORN; WHEAT; HYBRID SO - Cereal Chemistry 2004 ;81(3):308-313 12138 UI - 4767 AU - Ramos J AU - Rojas T AU - Navarro F AU - Davalos F AU - Sanjuan RN AU - Rutiaga J AU - Young RA AD - Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53705, USAMichoacan Univ, Dept Forestry, San Nicolas Hidalgo, Michoacan, MexicoUniv Guadalajara, Wood Cellulose & Paper Res Dept, Zapopan 45020, Jalisco, MexicoYoung, RA, Univ Wisconsin, Dept Forest Ecol & Management, 1630 Linden Dr, Madison, WI 53705 USA TI - Enzymatic and fungal treatments on sugarcane bagasse for the production of mechanical pulps AB - Crude ligninolytic enzyme extracts from Phanerochaete chrysosporium fungi were applied to sugarcane bagasse, prior to thermomechanical (TMP) and chemithermomechanical pulping (CTMP), and their properties were compared with the normal TMP and CTMP and also with TMP and CTMP pretreated with Ceriporiopsis subvermispora and P. chrysosporium fungi. The sugarcane bagasse was impregnated with the crude enzyme extract containing lignin peroxidase (UP), manganese peroxidase (MnP), and laccase (Lac). The results show that pretreatment with enzyme crude extract is an advantageous way to produce TMP and CTMP from sugarcane bagasse, as compared with only fungal pretreatment. Enzymatic pretreatments need only hours to enhance pulping and paper properties, compared with the weeks necessary for fungal treatments. Higher pulp yields were obtained compared with the fungal pretreatments. Enzymatic pretreatment reduced the energy consumption in a proportion similar to that of C. subvermispora fungal pretreatment and increased the pulp tensile index compared with the normal TMP and CTMP pulps, although the tensile strength was somewhat lower than that for pulps from C. subvermispora fungal pretreatment before CTMP processing. An advantage of enzymatic pretreatment is that brightness is increased compared with normal TMP and CTMP processes, whereas fungal pretreatments reduce the brightness MH - Mexico|Jalisco MH - Mexico|Michoacan MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000223137000021 L2 - biotechnology;biomechanical pulping;enzyme treatment;white-rot fungi;mechanical pulps;pulping energy consumption;sugarcane bagasse;WHITE-ROT FUNGI; BASIDIOMYCETE PHANEROCHAETE-CHRYSOSPORIUM; CERIPORIOPSIS-SUBVERMISPORA; MANGANESE PEROXIDASE; LIGNIN DEGRADATION; WHEAT-STRAW; PAPER; PRETREATMENTS; LACCASE SO - Journal of Agricultural and Food Chemistry 2004 ;52(16):5057-5062 12139 UI - 6126 AU - Ramos JG AU - Silva J AU - Vidal G AD - Inst Tecnol La Piedad, La Piedad, Michoacan, MexicoUPV, DSIC, E-46022 Valencia, SpainRamos, JG, Inst Tecnol La Piedad, Av Tecnol 2000, La Piedad, Michoacan, Mexico TI - An embedded language approach to router specification in curry AB - The development of modern routers require a significant effort to be designed, built, and verified. While hardware routers are faster, they are difficult to configure and maintain. Software routers, on the other hand, are slower but much more flexible, easier to configure and maintain, less expensive, etc. Recently, a modular architecture and toolkit for building software routers and other packet processors has been introduced: the Click system. It includes a specification language with features for declaring and connecting router elements and for designing abstractions. In this work, we introduce the domain-specific language Rose for the specification of software routers. Rose is embedded in Curry, a modern declarative multi-paradigm language. An advantage of this approach is that we have available a framework where router specifications can be transformed, optimized, verified, etc., by using a number of existing formal techniques already developed for Curry programs. Furthermore, we show that the features of Curry are particularly useful to specify router configurations with a high-level of abstraction. Our first experiments point out that the proposed methodology is both useful and practical MH - Mexico|Michoacan MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000189212700024 SO - Sofsem 2004: Theory and Practice of Computer Science, Proceedings 2004 ;2932():277-288 12140 UI - 4190 AU - Ramos LE AU - Celikovsky S AU - Kucera V AD - UAEH CU, ICBI, Ctr Invest Tecnol Informat & Sistemas, Pachuca 42084, MexicoAcad Sci Czech Republ, Inst Informat Theory & Automat, Prague 18208, Czech RepublicCzech Tech Univ, Fac Elect Engn, Prague 16627, Czech RepublicRamos, LE, UAEH CU, ICBI, Ctr Invest Tecnol Informat & Sistemas, Pachuca 42084, Mexico TI - Generalized output regulation problem for a class of nonlinear systems with nonautonomous exosystem AB - The problem of the generalized output regulation is considered here. In contrast to the classical output regulation problem, where the references to be tracked and disturbances to be rejected are generated by an autonomous exogeneous system, for the generalized output regulation an exogenous system is driven by an unknown external reference signal. In such a way, the class of reference or disturbance signals is expanded. Presented result solves the full measurement feedback case and is based on the well-known notion of the regulator equation combined with the classical concept of the invariant distribution. Illustrative example, including MATLAB-SIMULINK simulations, is presented to demonstrate the suggested approach MH - Czech Republic MH - Mexico|Hidalgo PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000224350000012 L2 - differential geometric;nonlinear continuous time systems;output regulation;SERVOMECHANISM PROBLEM; FEEDBACK; MANIFOLDS SO - Ieee Transactions on Automatic Control 2004 ;49(10):1737-1742 12141 UI - 5588 AU - Ramos MD AU - Jerz G AU - Villanueva S AU - Lopez-Dellamary F AU - Waibel R AU - Winterhalter P AD - Tech Univ Carolo Wilhelmina Braunschweig, Inst Food Chem, D-38106 Braunschweig, GermanyUniv Guadalajara, Dept Wood Cellulose & Paper, CUCEI, Zapopan, Jalisco, MexicoRes Ctr Invest Tech & Design Assist Jalisco State, Guadalajara 44270, Jalisco, MexicoUniv Erlangen Nurnberg, Inst Med Chem, D-91052 Erlangen, GermanyWinterhalter, P, Tech Univ Carolo Wilhelmina Braunschweig, Inst Food Chem, Schleinitz Str 20, D-38106 Braunschweig, Germany TI - Two glucosylated abscisic acid derivates from avocado seeds (Persea americana Mill. Lauraceae cv. Hass) AB - Phytochemical investigation of avocado seed material (Persea americana Mill., Lauraceae) resulted in the isolation of two glucosylated abscisic acid derivates. One of these was not known as a natural product and can be regarded as a potential 'missing link' in abscisic acid metabolism in plants. After fractionation by high-speed countercurrent chromatography, and multiple steps of column chromatography, structures were elucidated by 1D-, 2D-NMR, electrospray-MS to be the novel beta-D-glucoside of (1'S,6'R)-8hydroxyabscisic acid, and (1'R,3'R,5'R,8'S)-epi-dihydrophaseic acid beta-D-glucoside. Absolute configuration was determined by circulardichroism, optical rotation, and by NOE experiments. (C) 2003 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Jalisco PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0031-9422 UR - ISI:000221135300026 L2 - Persea americana Mill. (cv. Hass) Lauraceae;avocado seeds;abscisic acid beta-D-glucoside;(1 ' S,6 ' R)-8 '-hydroxyabscisic acid beta-D-glucoside;(1 ' R,3 ' R,5 ' R,8 ' S)-epi-dihydrophaseic acid beta-D-glucoside;high-speed countercurrent chromotography;stereochemistry;circulardichroism;plant metabolism;OIL SO - Phytochemistry 2004 ;65(7):955-962 12142 UI - 5585 AU - Ramos PL AU - Fuentes AD AU - Quintana Q AU - Castrillo G AU - Guevara-Gonzalez RG AU - Peral R AU - Rivera-Bustamante RF AU - Pujol M AD - Ctr Ingn Genet & Biotecnol, Dept Plantas, Havana, CubaInst Tecnol Celaya, Celaya 38010, Gto, MexicoIPN, Ctr Invest & Estudios Avanzados, Unidad Irapuato, Irapuato, Guanajuato, MexicoRamos, PL, Ctr Ingn Genet & Biotecnol, Dept Plantas, POB 6162, Havana, Cuba TI - Identification of the minimal sequence required for vascular-specific activity of Tomato mottle Taino virus replication-associated protein promoter in transgenic plants AB - A 597 nt fragment from Tomato mottle Taino virus (ToMoTV) DNA-A, with 459 nt located upstream of the Replication-associated protein translation start codon, was tested for promoter activity in solanaceous plants. The promoter activity of this fragment (pRep(459::Rep)) was demonstrated when it was introduced upstream the uidA reporter gene into tobacco, potato and tomato plants by genetic transformation. It became active in 7-day-old transgenic tobacco seedlings as revealed by a vascular-specific pattern of gene expression which was maintained during the continued growth of the plant. Transformed potato and tomato plants also showed a vascular-specific pattern of expression. In comparative assays, pRep(459::Rep) showed an expression activity 10-40-fold less than the 35S promoter from Cauliflower mosaic virus. To delimit the minimal cis-acting elements necessary for vascular specificity of this promoter, a set of PCR deletion mutants of pRep(459::Rep) (pRep(459), pRep(324), pRep(203), pRep(145), pReP(132) and pRep(115)), were generated and used to transform tobacco plants. Transgenic tobacco plants belonging to all the pRep versions were blue stained in the vascular system except those from the pRep(115) version. The results described in this report demonstrate that the minimal sequences necessary for the pRep promoter activity are confined in a segment of 132 nts (located between the nts 2454 and 2585 of the ToMoTV DNA A) and that this promoter harbors those elements sufficient for vascular-specific expression. (C) 2004 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Virology U5 - J;Article AV - English IS - 0168-1702 UR - ISI:000221148900001 L2 - geminivirus;Tomato mottle Taino virus;vascular-specific gene expression;promoter;beta-glucuronidase;CASSAVA MOSAIC-VIRUS; TISSUE-SPECIFIC EXPRESSION; DNA-REPLICATION; TRANSCRIPTIONAL REGULATION; GEMINIVIRUS REPLICATION; BETA-GLUCURONIDASE; GENE; ELEMENTS; TRANSACTIVATION; ACTIVATION SO - Virus Research 2004 ;102(2):125-132 12143 UI - 5675 AU - rana-Cuenca A AU - Roda A AU - Tellez A AU - Loera O AU - Carbajo JM AU - Terron MC AU - Gonzalez AE AD - CSIC, Ctr Invest Biol, E-28040 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoArana-Cuenca, A, CSIC, Ctr Invest Biol, Ramiro Maeztu 9, E-28040 Madrid, Spain TI - Comparative analysis of laccase-isozymes patterns of several related Polyporaceae species under different culture conditions AB - The study of isozymes has to date been successfully applied in the identification of a number of different microorganisms, particularly fungi. Trametes sp. I-62 (CECT20197) is a white-rot fungus with potential biotechnological applications. It has been identified as Trametes on the basis of the mycelium morphology, but the features observed are not sufficient for its classification at the species level. Given that this strain produces a very characteristic laccase isozyme pattern, in the present work we compared its isozyme profile with the profiles produced by ten other very closely phylogenetically related fungi from the Polyporaceae family. The data indicates that Trametes sp. I-62 could not be included in any of the taxonomically related species which were analysed in the present work. Extracellular laccases were detected in nine of the fungi studied and in four of them namely Trametes subectypus, Trametes pavonia, Trametes ochracea and Trametes gallica, this is the first report of such activity. Given that phylogenetically related fungi growing in the same culture conditions exhibit different laccase patterns, these isozymes could be used as an additional criterion for fungal identification MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 0233-111X UR - ISI:000220915700001 L2 - WHITE-ROT FUNGI; PLEUROTUS-OSTREATUS; TRAMETES-VERSICOLOR; EXTRACELLULAR LACCASE; CECT 20197; PURIFICATION; COPPER; QUERCOPHILUS; PUBESCENS; INDUCERS SO - Journal of Basic Microbiology 2004 ;44(2):79-87 12144 UI - 3700 AU - Rana MS AU - Navarro R AU - Leglise J AD - CNRS, Catalyse & Spectrochim Lab, UMR 6506, ENSICAEN, F-14050 Caen, FranceRana, MS, Inst Mexicano Petr, Mexico City 07730, DF, Mexico TI - Competitive effects of nitrogen and sulfur content on activity of hydrotreating CoMo/Al2O3 catalysts: a batch reactor study AB - The effect of sulfur and nitrogen contents on the activity of CoMo/Al2O3 hydrotreating catalyst was investigated using model reactants such as dibenzothiophene (DBT) for hydrodesulfurization (HDS), 2,6-dimethylaniline (DMA) for hydrodenitrogenation (HDN), and 1-methylnapthalene (1-MN) for hydrodearomatization (HDA) in a batch reactor at 4 MPa and 340 degreesC. The effect of sulfur (0-2 wt.%) and nitrogen (0-0.2 wt.%) contents was studied by changing the concentrations of DBT and DMA, respectively. The presence of sulfur and nitrogen compounds together in a feed illustrated the way produced H2S and NH3 influence the catalyst properties. The sulfur content was varied at fixed nitrogen content vis-it-vis variation of nitrogen at fixed sulfur content. Interestingly, the observed relative decrease in activity at high concentrations of DBT or DMA followed similar trend. The conversion of model feed was used to find out better insight for the inhibition in hydrotreating functionalities such as C-S and C-N hydrogenolysis and hydrogenation. Among these, all catalytic functionalities were not affected at similar magnitude with added sulfur or nitrogen content. The results indicated that adsorbed S and/or N species, which caused a decrease in hydrogenolysis activities, inhibited a part of the catalytic sites. The results also indicated opposite effects of the produced H2S and NH3 on selectivity. H2S improves slightly the selectivity for hydrogenation contrary to NH3 that causes a strong decrease in hydrogenation selectivity. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000225613500008 L2 - hydrodesulfurization;hydrodenitrogenation;hydrogenation;sulfided catalyst;inhibition;active sites;effect of hydrogen sulfide;effect of ammonia;competitive reactions;SULFIDE CATALYSTS; HYDROGEN-SULFIDE; THIOPHENE HYDRODESULFURIZATION; OIL FRACTIONS; GAS OIL; HDS; DIBENZOTHIOPHENE; MODEL; HYDRODENITROGENATION; 2,6-DIMETHYLANILINE SO - Catalysis Today 2004 ;98(1-2):67-74 12145 UI - 5208 AU - Rana MS AU - Maity SK AU - Ancheyta J AU - Dhar GM AU - Rao TSRP AD - Inst Mexicano Petr, Hydrotreatment Maya Crude, Mexico City 07730, DF, MexicoIndian Inst Petr, Dehra Dun 245008, Uttranchal, IndiaRana, MS, Inst Mexicano Petr, Hydrotreatment Maya Crude, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - MoCo(Ni)/ZrO2-SiO2 hydrotreating catalysts: physico-chemical characterization and activities studies AB - CoMo/ZrO2-SiO2 mixed oxide supported catalysts have been investigated for hydrotreating of model molecules in a micro-reactor at 400 degreesC and atmospheric pressure. Activity studies were carried out for thiophene hydrodesulfurization (HDS) and cyclohexene hydrogenation (HYD). These activities on sulfided catalysts were evaluated as a function of support composition [Zr/(Zr + Si) = 0.15, 0.30, 0.45, 0.70], rnolybdenum (2-14 wt.%) and promoters Co, Ni (1-5 wt.%) contents. The supported catalysts were characterized by BET specific surface area, XRD. UV-DRS and low temperature O-2 chemisorptions. Low temperature O-2 chemisorption (LTOC) at -78 degreesC was conducted on the sulfided catalysts in order to determine Mo dispersion on the surface of the support and concentration of coordinative unsaturated sites (CUS) which is related to the HDS and HYD activities. The oxygen uptakes and catalytic activities results followed similar trend with molybdenum variation indicating that the number of active sites for HDS varies with Mo content. HDS and HYD activities increase up to 6 wt.% Mo and beyond this loading activities decrease with further increase Mo content. The characterization results of XRD, UV-DRS and LTOC agreed well about the Mo dispersion. Incorporation of ZrO2 in SiO2 improves weak interaction of active phases with the SiO2 support and overcomes poor dispersion on the support surface. Therefore, ZrO2 counter part plays a key role to provide better activity through enhanced number of active sites as well as activity per site. The promotional effect increases with decreasing SiO2 content in the support composition. (C) 2004 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000222128700012 L2 - CoMo;HDS;HYD;hydrotreating;ZrO2-SiO2;O-2 chemisorption;HYDRODESULFURIZATION CATALYSTS; OXYGEN-CHEMISORPTION; MOLYBDENA CATALYSTS; SUPPORTED CATALYSTS; SULFIDE CATALYSTS; SURFACE-AREA; ALUMINA; OXIDE SO - Applied Catalysis A-General 2004 ;268(1-2):89-97 12146 UI - 6235 AU - Rana MS AU - Maity SK AU - Ancheyta J AU - Dhar GM AU - Rao TSRP AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIndian Inst Petr, Dehra Dun 245008, Uttranchal, IndiaRana, MS, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Cumene cracking functionalities on sulfided Co(Ni)Mo/TiO2-SiO2 catalysts AB - Cumene cracking reaction was carried out on pure support as well as sulfided Mo, CoMo, and NiMo catalysts in a plug flow micro-reactor at 400degreesC and atmospheric pressure. Catalytic activity was studied as a function of Mo content, promoter content (Co, Ni), and support composition [Ti/(Ti + Si) = 0.0, 0. 15, 0.30, 0.45, 0.70, 1.0]. Surface acid-base properties of pure supports were measured with 2-propanol decomposition, showed that the supports were acidic in nature, the acidic character increases with increasing TiO2 content in SiO2. Techniques used for characterization were BET specific surface area (SSA), pore volume, X-ray diffraction, CO2 chemisorption, and low temperature oxygen chemisorption (LTOC). CO2 chemisorption on sulfided catalysts showed a strong decrease in the amount of CO2 adsorption as a function of metal loading. The sulfided-supported catalysts exhibited better cracking activity in presence of hydrogen, which suggests that sulfided molybdenum phases were responsible for cumene cracking activity. The LTOC and catalytic activity results showed similar trends with variation of molybdenum content which indicated that the cracking activity of Mo and CoMo catalysts has significant contribution from the supported phases. The cumene cracking activity over supported catalysts is attributed to the Bronsted (S-H) sites like sulfhydryl groups. Variation of support composition strongly affects the catalytic cracking activity which decreases with increasing TiO2 content in SiO2. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000188969600010 L2 - TiO2-SiO2 support;CoMo catalysts;oxygen chemisorption;cracking;hydroprocessing;SURFACE-ACIDITY; MOLYBDENUM ADDITIVES; OXIDE CATALYSTS; GAMMA-ALUMINA; MIXED OXIDES; HYDRODESULFURIZATION CATALYSTS; HYDROTREATING CATALYSTS; CYCLOHEXENE CONVERSION; ALPO4-AL2O3 CATALYSTS; SUPPORTED CATALYSTS SO - Applied Catalysis A-General 2004 ;258(2):215-225 12147 UI - 4924 AU - randa-Bricaire E AU - Kotta U AD - CINVESTAV, Dept Ingn Elect, Secc Mecatron, Mexico City 07000, DF, MexicoTallinn Tech Univ, Inst Cybernet, EE-12618 Tallinn, EstoniaAranda-Bricaire, E, CINVESTAV, Dept Ingn Elect, Secc Mecatron, AP 14-740, Mexico City 07000, DF, Mexico TI - A geometric solution to the dynamic disturbance decoupling for discrete-time nonlinear systems AB - The notion of controlled invariance under quasi-static state feedback for discrete-time nonlinear systems has been recently introduced and shown to provide a geometric solution to the dynamic disturbance decoupling problem (DDDP). However, the proof relies heavily on the inversion (structure) algorithm. This paper presents an intrinsic, algorithm-independent, proof of the solvability conditions to the DDDP MH - Estonia MH - Mexico|Distrito Federal PB - PRAGUE 8: KYBERNETIKA RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Cybernetics U5 - J;Article AV - English IS - 0023-5954 UR - ISI:000222601100003 L2 - controlled invariance;dynamic state feedback;disturbance decoupling;differential forms;GENERALIZED CONTROLLED INVARIANCE SO - Kybernetika 2004 ;40(2):197-206 12148 UI - 5488 AU - randa-Bricaire E AU - Moog CH AD - CINVESTAV, Secc Mecatron, Dept Ingn Elect, Mexico City 07000, DF, MexicoUniv Nantes, Ecole Natl Super Tech Ind & Mines Nantes, Unite Mixte CNRS 6597, IRCCyN, F-44035 Nantes, FranceUniv Nantes, Ecole Natl Super Tech Ind & Mines Nantes, Ecole Cent Nantes, F-44035 Nantes, FranceAranda-Bricaire, E, CINVESTAV, Secc Mecatron, Dept Ingn Elect, AP 14-740, Mexico City 07000, DF, Mexico TI - Invariant codistributions and the feedforward form for discrete-time nonlinear systems AB - The goal of this paper is two-fold. First, given an arbitrary n-dimensional discrete-time nonlinear dynamical system, necessary and sufficient conditions for the existence of a one-dimensional invariant codistribution are obtained. Second, it is shown that the previous conditions can be used iteratively to obtain a nested sequence of n invariant codistributions with the properties that each codistribution contains the previous one and the last one coincides with the cotangent bundle of the state manifold. As a byproduct, necessary and sufficient conditions are obtained for a discrete-time nonlinear dynamical system to be equivalent to the so-called feedforward form. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Operations Research & Management Science U5 - J;Article AV - English IS - 0167-6911 UR - ISI:000221489000003 L2 - nonlinear systems;discrete-time systems;dynamic systems;invariance;codistributions;GENERALIZED CONTROLLED INVARIANCE; DISTURBANCE DECOUPLING PROBLEM SO - Systems & Control Letters 2004 ;52(2):113-122 12149 UI - 5001 AU - Rang C AU - Bergvingson D AU - Bohorova N AU - Hoisington D AU - Frutos R AD - Cirad, F-34398 Montpellier 05, FranceCIMMYT, Mexico City 06600, DF, MexicoRang, C, Cirad, TA40-PS1,Blvd Lironde, F-34398 Montpellier 05, France TI - Competition of Bacillus thuringiensis Cry1 toxins for midgut binding sites: A basis for the development and management of transgenic tropical maize resistant to several stemborers AB - Binding and competition of five Bacillus thuringiensis toxins-Cry1Ab, Cry1Ac, Cry1Ba, Cry1Ca, and Cry1Ea-for midgut binding sites from three pests, Spodoptera frugiperda, Diatraea saccharalis, and Diatraea grandiosella, were investigated as part of a strategy to develop tropical transgenic maize resistant to several stemborers. On S. frugiperda, Cry1Ab and Cry1Ac compete for the same binding site; Cry1Ba and Cry1Ca compete for a second binding site. Cry1Ea recognizes a third specific binding site in S. frugiperda and does not compete with any of the other toxins. On D. grandiosella and D. saccharalis, Cry1Ac competes with Cry1Ab and not with Cry1Ba and Cry1Ca. Cry1Ba and Cry1Ca recognize each a specific binding site and do not compete with any of the other four toxins. Cry1Ea does not recognize any binding site on Diatraea species. Combinations of toxins are proposed to develop transgenic maize resistant to the three stemborers while allowing resistance management MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000222607500005 L2 - INSECTICIDAL CRYSTAL PROTEINS; MOTH; LEPIDOPTERA; GENES SO - Current Microbiology 2004 ;49(1):22-27 12150 UI - 5323 AU - Rapoport Y AU - Grimalsky V AU - Hayakawa M AU - Ivchenko V AU - Juarez R AU - Koshevaya S AU - Gotynyan O AD - Taras Shevchenko Kyiv Natl Univ, Fac Phys, Kiev, UkraineNatl Inst Astrophys Opt & Elect, Puebla 72000, Pue, MexicoUniv Electrocommun, Chofu, Tokyo 1828585, JapanAutonomous Univ Morelos, UAEM, Fac Chem, CIICAp, Cuernavaca 62210, Morelos, MexicoRapoport, Y, Taras Shevchenko Kyiv Natl Univ, Fac Phys, Prosp Glushkov 6,22, Kiev, Ukraine TI - Change of ionospheric plasma parameters under the influence of electric field which has lithospheric origin and due to radon emanation AB - A mechanism of electric-photochemistry channel of seismo-ionospheric coupling is investigated. In particular, the penetration of electric field from the lithospheric source into the ionosphere and effect of this field on the photochemistry coefficient and ionospheric parameters in the altitude range in the lower D region are modeled numerically. It is shown that observable effects can be expected when lithospheric electric source strength is of the order of 1.5 kV/m. In this case, variations of electron temperature and electron concentration will be of the order of (40-60)% and (25-40)% respectively at the range of altitudes 60-70 km. An increase of near-ground conductivity (caused by increasing humidity and/or radon emanation) by similar to2.3 times can cause increase of electric field intensity by similar to2 times in altitude ranges of 60-70 km. Corresponding relative change of T-e increases up to similar to50%, as compared with the case of lower near-ground temperature. Spatial shapes of relative distribution of electron temperature and the ratio of negative ion-electron concentration map the spatial shape of the lithospheric electric field distribution. Spatial shapes of electron concentration distribution and electric field strength distribution of the lithospheric source are "opposite" to each other. (C) 2004 Elsevier Ltd. All rights. reserved MH - Japan MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 1474-7065 UR - ISI:000221832000034 L2 - D-REGION; CONDUCTIVITY; EARTHQUAKES; PENETRATION; ATMOSPHERE; MODEL SO - Physics and Chemistry of the Earth 2004 ;29(4-9):579-587 12151 UI - 5773 AU - Rasoul S AU - Carretero OA AU - Peng HM AU - Cavasin MA AU - Zhuo JL AU - Sanchez-Mendoza A AU - Brigstock DR AU - Rhaleb NE AD - Henry Ford Hosp, Hypertens & Vasc Res Div, Detroit, MI 48202, USAUniv Groningen Hosp, Groningen, NetherlandsInst Natl Cardiol Ignacio Chavez, Delegac Tlalpan, Mexico City, DF, MexicoOhio State Univ, Dept Surg, Columbus, OH 43210, USARhaleb, NE, Henry Ford Hosp, Hypertens & Vasc Res Div, E&R 7015,2799 W Grand Blvd, Detroit, MI 48202 USA TI - Antifibrotic effect of Ac-SDKP and angiotensin-converting enzyme inhibition in hypertension AB - Objective N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP) is a potent natural inhibitor of hematopoietic stem cell proliferation which is degraded mainly by angiotensin-converting enzyme (ACE). In vitro, Ac-SDKP inhibits collagen production by cardiac fibroblasts; while in vivo it blocks collagen deposition in the left ventricle (LV) of rats with hypertension or myocardial infarction (MI). In addition, it reportedly prevents and reverses macrophage infiltration in the LV of rats with MI. We tested the hypothesis that when Ac-SDKP is infused at doses that cause plasma concentrations similar to those observed after ACE inhibition, it mimics the anti-inflammatory and antifibrotic effects of ACE inhibitors (ACEi) in the heart, and, further, that these effects are independent of changes in blood pressure. Design and methods Rats were divided into five groups: (1) controls, (2) Ang II (750 mug/kg per day, s.c.), (3) Ang II + captopril (100 mg/kg per day in drinking water), (4) Ang II + Ac-SDKP (400 mug/kg per day, s.c.), and (5) Ang II + Ac-SDKP (800 mug/kg per day, s.c.). We measured LV cell proliferation, inflammatory cell infiltration, cytokine expression, hypertrophy and fibrosis. Results Plasma Ac-SDKP was five-fold higher in rats given ACEi and four- and ten-fold higher in rats given 400 and 800 mug/kg per day Ac-SDKP, respectively. ACEi significantly decreased Ang II-induced cell proliferation (Ki-67), LV macrophage/mast cell infiltration, transforming growth factor-beta, connective tissue growth factor and collagen deposition without affecting hypertension, LV hypertrophy or myocyte cross-sectional area, and these effects were mimicked by exogenous Ac-SDKP (400 mug/kg per day) which raised plasma Ac-SDKP to levels similar to ACEi BP was not decreased by either ACEi or Ac-SDKP. Conclusions We concluded that Ac-SDKP may be an important mediator of the anti-inflammatory and antifibrotic effects of ACEi in hypertension independent of its hemodynamic effects. (C) 2004 Lippincott Williams Wilkins MH - Mexico|Distrito Federal MH - USA MH - Netherlands PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 18 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0263-6352 UR - ISI:000220668900023 L2 - N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP);angiotensin;angiotensin-converting enzyme inhibitor;collagen;heart;hypertension;inflammation;ASPARTYL-LYSYL-PROLINE; STEM-CELL PROLIFERATION; TISSUE GROWTH-FACTOR; RAT CARDIAC FIBROBLASTS; MAST-CELLS; MYOCARDIAL FIBROSIS; TGF-BETA; COLLAGEN DEPOSITION; INFLAMMATORY CELLS; NEGATIVE REGULATOR SO - Journal of Hypertension 2004 ;22(3):593-603 12152 UI - 6352 AU - Rausell C AU - Garcia-Robles I AU - Sanchez J AU - Munoz-Garay C AU - Martinez-Ramirez AC AU - Real MD AU - Bravo A AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoUniv Valencia, Fac Ciencias Biol, E-46100 Valencia, SpainBravo, A, Univ Nacl Autonoma Mexico, Inst Biotecnol, Ap Posta 510-3, Cuernavaca 62250, Morelos, Mexico TI - Role of toxin activation on binding and pore formation activity of the Bacillus thuringiensis Cry3 toxins in membranes of Leptinotarsa decemlineata (Say) AB - Binding and pore formation constitute key steps in the mode of action of Bacillus thuringiensis delta-endotoxins. In this work, we present a comparative analysis of toxin-binding capacities of proteolytically processed Cry3A, Cry3B and Cry3C toxins to brush border membranes (BBMV) of the Colorado potato beetle Leptinotarsa decemlineata (CPB), a major potato coleopteran-insect pest. Competition experiments showed that the three Cry3 proteolytically activated toxins share a common binding site. Also heterologous competition experiments showed that Cry3Aa and Cry3Ca toxins have an extra binding site that is not shared with Cry3Ba toxin. The pore formation activity of the three different Cry3 toxins is analysed. High pore-formation activities were observed in Cry3 toxins obtained by proteolytical activation with CPB BBMV in contrast to toxins activated with either trypsin or chymotrypsin proteases. The pore-formation activity correlated with the formation of soluble oligomeric structures. Our data support that, similarly to the Cry1A toxins, the Cry3 oligomer is formed after receptor binding and before membrane insertion, forming a pre-pore structure that is insertion-competent. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0005-2736 UR - ISI:000188707400012 L2 - Bacillus thuringiensis;protoxin activation;mode of action;BRUSH-BORDER MEMBRANE; INSECTICIDAL CRYSTAL PROTEINS; COLORADO POTATO BEETLE; DELTA-ENDOTOXIN; PROTEOLYTIC CLEAVAGE; NUCLEOTIDE-SEQUENCE; VAR TENEBRIONIS; LARVAL MIDGUT; MANDUCA-SEXTA; GUT PROTEASES SO - Biochimica et Biophysica Acta-Biomembranes 2004 ;1660(1-2):99-105 12153 UI - 5178 AU - Rawlings S AU - Willott CJ AU - Hill GJ AU - Archibald EN AU - Dunlop JS AU - Hughes DH AD - Univ Oxford, Dept Phys, Oxford OX1 3RH, EnglandNatl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, CanadaUniv Texas, McDonald Observ, Dept Astron, Austin, TX 78712, USAJoint Astron Ctr, Hilo, HI 96720, USAUniv Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRawlings, S, Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England TI - Submillimetre photometry of typical high-redshift radio quasars AB - We present Submillimetre Common-User Bolometer Array (SCUBA) photometry of a sample of eight high-redshift (2.5 less than or equal toz < 3.5) radio quasars from two redshift surveys: the TexOx-1000 (or TOOT) Survey and the 7C Redshift Survey (7CRS). Unlike the powerful high-redshift radio sources observed previously in the submillimetre, these radio sources are typical of those dominating the radio luminosity density of the population. We detect just two of the TOOT/7CRS targets at 850 mum, and one of these detections is probably due to synchrotron emission rather than dust. The population represented by the other six objects is detected in a statistical sense with their average 850-mum flux density implying that they are similar to low-redshift, far-infrared luminous quasars undergoing at most moderate (less than or similar to200 M(.)yr(-1)) starbursts. By considering all the SCUBA data available for radio sources, we conclude that positive correlations between rest-frame far-infrared luminosity L-FIR, 151-MHz luminosity L-151 and redshift z, although likely to be present, are hard to interpret because of subtle selection and classification biases, small number statistics and uncertainties concerning synchrotron contamination and k-correction. We argue that there is not yet any compelling evidence for significant differences in the submillimetre properties of radio-loud and radio-quiet quasars at high redshift MH - Canada MH - United Kingdom MH - Mexico|Puebla MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221976900028 L2 - galaxies : active;galaxies : evolution;galaxies : formation;galaxies : jets;galaxies : luminosity function, mass function;ABSORPTION-LINE QUASARS; ACTIVE GALACTIC NUCLEI; OPTICAL SPECTROSCOPY; LUMINOSITY FUNCTION; INFRARED GALAXIES; COMPLETE SAMPLES; UNIFIED SCHEMES; FREQUENCY; EMISSION; WAVELENGTHS SO - Monthly Notices of the Royal Astronomical Society 2004 ;351(2):676-684 12154 UI - 4233 AU - Raza SS AU - Iqbal M AU - Salahuddin A AU - Avila R AU - Pervez S AD - Pakistan Inst Nucl Sci & Technol, Nucl Engn Div, Islamabad 45650, PakistanNatl Autonomous Univ Mexico, Fac Engn, Mexico City, DF, MexicoRaza, SS, Pakistan Inst Nucl Sci & Technol, Nucl Engn Div, PO Nilore, Islamabad 45650, Pakistan TI - Time-integrated thyroid dose for accidental releases from Pakistan Research Reactor-1 AB - The two-hourly time-integrated thyroid dose due to radio-iodines released to the atmosphere through the exhaust stack of Pakistan Research Reactor-1 (PARR-1), under accident conditions, has been calculated. A computer program, PAKRAD (which was developed under an IAEA research grant, PAK/RCA/8990), was used for the dose calculations. The sensitivity of the dose results to different exhaust flow rates and atmospheric stability classes was studied. The effect of assuming a constant activity concentration (as a function of time) within the containment air volume and an exponentially decreasing air concentration on the time-integrated dose was also studied for various flow rates (1000-50000 m(3) h(-1)). The comparison indicated that the results were insensitive to the containment air exhaust rates up to or below 2000 m(3) h(-1), when the prediction with the constant activity concentration assumption was compared to an exponentially decreasing activity concentration model. The results also indicated that the plume touchdown distance increases with increasing atmospheric stability MH - Mexico|Distrito Federal MH - Pakistan PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0952-4746 UR - ISI:000224263800010 L2 - ATMOSPHERIC DISPERSION; MODEL SO - Journal of Radiological Protection 2004 ;24(3):307-314 12155 UI - 4459 AU - Read DJ AU - Leake JR AU - Perez-Moreno J AD - Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandColegio Postgrad Microbiol Edafol Irenat, Mexico City 56320, DF, MexicoRead, DJ, Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England TI - Mycorrhizal fungi as drivers of ecosystem processes in heathland and boreal forest biomes AB - The importance of mycorrhizas in heathland and boreal forest biomes, which together cover much of the landmass of the Northern Hemisphere and store most of the global stocks of carbon, is reviewed. The taxonomic affinities of the organisms forming these symbiotic partnerships are assessed, and the distinctive structural features of the ericoid mycorrhizas of heathland dwarf shrubs and the ectomycorrhizas of boreal forest trees are described. It is stressed that neither in terms of the geographical distribution of the plants nor in terms of the occurrence of their characteristic mycorrhizas in the soil profile should these biomes be considered to be mutually exclusive. What unites them is their apparent affinity for acidic organic soils of inherently low accessibility of the major nutrients nitrogen (N) and phosphorus (P). These properties relate directly to the nature of the nutrient-poor recalcitrant litter produced by their host plants and through positive-feedback mechanisms that are reinforced by selective removal of labile nutrients by the mycorrhizas. We suggest that coevolution of these plant litter traits with mycorrhizal associations that are adapted to them has been one of the defining features of these ecosystems. Ericoid and ectomycorrhizal fungi have biochemical and physiological attributes that make them highly efficient at scavenging for organic sources of N and P in surface soil horizons. In so doing, they restrict supplies of these elements to the decomposer communities. Case studies involving exploitation of N and P in defined organic substrates are described. In both biomes the dominant plants depend upon the abilities of their fungal partners to recover nutrients, so the symbioses control nutrient cycles, productivity, species composition, and functioning of these ecosystems. It is in this context that the fungal symbionts are here considered to be drivers of nutritional processes in their respective biomes. Through their influences upon the quality of carbon residues mycorrhizal fungi must also affect the sink-source balance for this key element in soil. There is an urgent need for the evaluation of the relative contributions of symbiotic and saprotrophic components of the microflora to the processes of carbon storage and cycling in these biomes, particularly in the context of global climate change and impacts of anthropogenic pollutant N deposition MH - United Kingdom MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 36 U4 - Plant Sciences U5 - J;Article AV - English IS - 0008-4026 UR - ISI:000223859200019 L2 - carbon sequestration;peatlands;C/N ratios;carbon and nutrient cycles;EXTRACELLULAR ENZYME-ACTIVITIES; ACID-PHOSPHATASE-ACTIVITY; PINUS-MURICATA FOREST; BEECH LEAF-LITTER; FREE AMINO-ACIDS; ECTOMYCORRHIZAL FUNGI; HYMENOSCYPHUS-ERICAE; PAXILLUS-INVOLUTUS; ORGANIC NITROGEN; AXENIC-CULTURE SO - Canadian Journal of Botany-Revue Canadienne de Botanique 2004 ;82(8):1243-1263 12156 UI - 4294 AU - Real RD AU - Khulbe K AD - Univ Iberoamer, Dept Ingn & Ciencias Quim, Mexico City 01210, DF, MexicoUniv Ottawa, Dept Chem Engn, Ottawa, ON K1N 6N5, CanadaReal, RD, CIATEC AC, Omega 201, Leon 37545, GTO, Mexico TI - Insertion of zeolite in sol-gel made catalytic material: An EPR study AB - Incorporation of zeolite to catalyst base-supports generally endows them with improved catalytic properties, especially those related to selectivity and activity. These effects are due to the stronger than normal acidity of zeolites and their molecular sieve effect. Such properties alter notoriously the way in which metals incorporate into a crystalline sol-gel catalytic matrix. Most noticeable effects on the surface as per EPR analysis occur upon incorporation of copper as metal catalyst when ZSM-5 zeolite is added, then when adding beta-zeolite and finally when using Y-zeolite MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0133-1736 UR - ISI:000224049400005 L2 - sol-gel;zeolite;EPR;silica-alumina;alkoxide;SILICA SO - Reaction Kinetics and Catalysis Letters 2004 ;83(1):31-37 12157 UI - 3884 AU - Reategui RJ AU - Kir'yanov AV AU - Pisarchik AN AU - Barmenkov YO AU - Il'ichev NN AD - Ctr Invest Opt, Leon 37150, Gto, MexicoRussian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow 119991, RussiaReategui, RJ, Ctr Invest Opt, Loma Bosque 115,Col Lomas Campestre, Leon 37150, Gto, Mexico TI - Experimental study and modeling of coexisting attractors and bifurcations in an erbium-doped fiber laser with diode-pump modulation AB - An all-fiber Erbium laser is shown to operate as a bistable nonlinear system under the control of harmonically modulated laser-diode pumping. We study a particular case where the pump modulation frequency is less than the fundamental laser frequency and show that a rich variety of bifurcations and attractors appear. An analysis, both experimental and theoretical, of the laser dynamics shows that the existence of frequency-locked states (Arnold's tongues) is a characteristic feature of this laser. The observed generalized bistability is demonstrated with codimensional-one and codimensional-two bifurcation diagrams in the parameter space of the modulation frequency and amplitude that results in overlapping of the Arnold's tongues for different attractors. Depending on the modulation frequency, two different scenarios to chaos, through period doubling and quasiperiodicity, are observed with an increase in the modulation amplitude MH - Mexico|Guanajuato MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 1054-660X UR - ISI:000225035500001 L2 - Q-SWITCHED FIBER; RING LASER; BISTABILITY; POWER SO - Laser Physics 2004 ;14(10):1277-1281 12158 UI - 4807 AU - Rebolledo-Vieyra M AU - Urrutia-Fucugauchi J AD - CEA, CNRS, Unite Rech Mixte, Lab Sci Climat & Environm, Gif Sur Yvette, FranceUNAM, Lab Paleomagnetismo, Inst Geofis, Mexico City, DF, MexicoRebolledo-Vieyra, M, CEA, CNRS, Unite Rech Mixte, Lab Sci Climat & Environm, Gif Sur Yvette, France TI - Magnetostratigraphy of the impact breccias and post-impact carbonates from borehole Yaxcopoil-1, Chicxulub impact crater, Yucatan, Mexico AB - We report the magnetostratigraphy of the sedimentary sequence between the impact breccias and the post-impact carbonate sequence conducted on samples recovered by Yaxcopoil-1 (Yax-1). Samples of impact breccias show reverse polarities that span up to similar to56 cm into the post-impact carbonate lithologies. We correlate these breccias to those of PEMEX boreholes Yucatan-6 and Chicxulub-1, from which we tied our magnetostratigraphy to the radiometric age from a melt sample from the Yucatan-6 borehole. Thin section analyses of the carbonate samples showed a significant amount of dark minerals and glass shards that we identified as the magnetic carriers; therefore, we propose that the mechanism of magnetic acquisition within the carbonate rocks for the interval studied is detrital remanent magnetism (DRM). With these samples, we constructed the scale of geomagnetic polarities where we find two polarities within the sequence, a reverse polarity event within the impact breccias and the base of the post-impact carbonate sequence (up to 794.07 m), and a normal polarity event in the last similar to20 cm of the interval studied. The polarities recorded in the sequence analyzed are interpreted to span from chron 29r to 29n, and we propose that the reverse polarity event lies within the 29r chron. The magnetostratigraphy of the sequence studied shows that the horizon at 794.11 m deep, interpreted as the K/T boundary, lies within the geomagnetic chron 29r, which contains the K/T boundary MH - France MH - Mexico|Distrito Federal PB - FAYETTEVILLE: METEORITICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1086-9379 UR - ISI:000222939300005 L2 - CRETACEOUS-TERTIARY BOUNDARY; PENINSULA; SEDIMENT SO - Meteoritics & Planetary Science 2004 ;39(6):821-829 12159 UI - 5858 AU - rechavaleta-Velasco F AU - Marciano D AU - az-Cueto L AU - Parry S AD - Univ Penn, Sch Med, Ctr Res Reprod & Womens Hlth, Philadelphia, PA 19104, USAInst Mexicano Seguro Social, Hosp Gineobstet Luis Castelazo Ayala, Res Unit Reprod Med, Mexico City, DF, MexicoArechavaleta-Velasco, F, Univ Penn, Sch Med, Ctr Res Reprod & Womens Hlth, 1352 Biomed Res Bldg 2-3,421 Curie Blvd, Philadelphia, PA 19104 USA TI - Matrix metalloproteinase-8 is expressed in human chorion during labor AB - Objective: The purpose of this study was to investigate the expression of matrix metalloproteinase-8 by human fetal membranes during labor. Study design: Fetal membranes were obtained from women who underwent normal labor or elective cesarean delivery at term. Matrix metalloproteinase-8 levels in fetal membranes were determined by enzyme-linked immunosorbent assay and Western blot; the expression of the matrix metalloproteinase-8 gene was detected by reverse transcription-polymerase chain reaction. Immunohistochemistry and in situ hybridization was performed to localize matrix metalloproteinase-8 protein and messenger RNA in intact membranes. Results: Matrix metalloproteinase-8 protein levels were increased 5-fold in fetal membranes from labor compared with membranes that were obtained from cesarean delivery. Western blots confirmed the presence of matrix metalloproteinase-8 in protein extracts. Reverse transcription-polymerase chain reaction, in situ hybridization, and immunohistochemistry. demonstrated that matrix metalloproteinase-8 messenger RNA and protein were expressed almost exclusively in the chorion after labor. Conclusion: We conclude that matrix metalloproteinase-8 is produced primarily by chorionic cells in human fetal membranes and that the level of matrix metalloproteinase-8 protein and messenger RNA expression in fetal membranes increases during labor. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 4 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000220577900040 L2 - parturition;neutrophil collagenase;matrix metalloproteinase-8;fetal membrane;HUMAN NEUTROPHIL COLLAGENASE; HUMAN FETAL MEMBRANES; PREMATURE RUPTURE; MATRIX-METALLOPROTEINASE-9; PARTURITION; MECHANISMS; PARACRINE; AUTOCRINE; INCREASES; INFECTION SO - American Journal of Obstetrics and Gynecology 2004 ;190(3):843-850 12160 UI - 5002 AU - Recillas-Targa F AU - Valadez-Graham V AU - Farre CM AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoNIDDK, NIH, Mol Biol Lab, Bethesda, MD, USARecillas-Targa, F, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-242, Mexico City 04510, DF, Mexico TI - Prospects and implications of using chromatin insulators in gene therapy and transgenesis AB - Gene therapy has emerged from the idea of inserting a wild-type copy of a gene in order to restore the proper expression and function of a damaged gene. Initial efforts have focused on finding the proper vector and delivery method to introduce a corrected gene to the affected tissue or cell type. Even though these first attempts are clearly promising, several problems remain unsolved. A major problem is the influence of chromatin structure on transgene expression. To overcome chromatin-dependent repressive transgenic states, researchers have begun to use chromatin regulatory elements to drive transgene expression. Insulators or chromatin boundaries are able to protect a transgene against chromatin position effects at their genomic integration sites, and they are able to maintain transgene expression for long periods of time. Therefore, these elements may be very useful tools in gene therapy applications for ensuring high-level and stable expression of transgenes. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 25 U4 - Biochemistry & Molecular Biology;Biology U5 - J;Article AV - English IS - 0265-9247 UR - ISI:000222494300013 L2 - MATRIX ATTACHMENT REGIONS; HUMAN BETA-GLOBIN; LOCUS-CONTROL REGION; ENHANCER-BLOCKING ACTIVITY; POSITION-INDEPENDENT EXPRESSION; HISTONE LYSINE METHYLATION; RETROVIRUS VECTORS; IN-VIVO; LENTIVIRAL VECTORS; ADENOVIRUS VECTORS SO - Bioessays 2004 ;26(7):796-807 12161 UI - 4071 AU - Reguera E AU - Balmaseda J AU - Rodriguez-Hernandez J AU - Autie M AU - Gordillo A AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaNatl Ctr Sci Res, Havana 6880, CubaIPN, Dept Fis, Escuela Super Fis & Matemat, Unidad Prof ALM, Mexico City 07738, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - Behavior of microporous nitroprussides in presence of ammonia AB - The behavior of microporous nitroprussides in the presence of ammonia, both in anhydrous and hydrated states, was studied using ammonia adsorption isotherms and IR, Mossbauer and XRD techniques. In their anhydrous state these materials behave as a zeolite for ammonia adsorption, however when structural water is present a decomposition process was observed. The crystallization or adsorbed water is used by ammonia to form NH4+ and OH-, creating basic conditions where the structural building unit [Fe(CN)(5)NO] loses the NO group to form a pentacyano complex. This leads to the formation of mixed salts, M(NH4)[Fe(CN)(5)].xH(2)O. For ferrous nitroprusside the formed OH- ion competes with the complex anion for the iron(2+) cation which is removed, then oxidized and finally observed as a ferric oxyhydroxide, FeOOH MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Chemistry, Physical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1380-2224 UR - ISI:000224802400003 L2 - adsorption;microporous;nitroprusside;pentacyanide;ammonia;Mossbauer;infrared;CRYSTAL-STRUCTURE ANALYSIS; NICKEL NITROPRUSSIDE; MOSSBAUER; SPECTRA; STATES; DESIGN SO - Journal of Porous Materials 2004 ;11(4):219-228 12162 UI - 5534 AU - Reguera E AU - Balmaseda J AU - Fernandez-Bertran J AU - Paneque A AU - Yee-Madeira H AD - Univ Havana San Lazaro & L, Inst Mat & Reagents, Havana 10400, CubaCtr Pharmaceut Chem, Havana, CubaIPN, Escuela Super Fis & Matemat, UP ALM, Mexico City 07738, DF, MexicoReguera, E, Univ Havana San Lazaro & L, Inst Mat & Reagents, Havana 10400, Cuba TI - Complex formation of ferric protoporphyrin IX from the reaction of hemin with ammonia and small aliphatic amines AB - Complexes of Fe-III protoporphyrin IX ((FePPIX)-P-III) with the amido anion were obtained from the reaction of Fe-III PPIX chloride (hemin) with ammonia and small aliphatic amines under solvent free conditions. The reaction of hemin with gaseous ammonia leads to a pentacoordinated complex at the iron site, PPIX - Fe - NH2, plus NH4Cl, while at the peripheral propionic acidic groups ammonium carboxylate is formed. The corresponding stoichiometry ( 1: 4 molar ratio of hemin to ammonia) was confirmed by the adsorption isotherm. Analogous reactions and complex formation were observed with EtNH2 and Et2NH. These reactions were monitored using X-ray diffraction (XRD), and i.r. and Mossbauer spectroscopies. The isomer shift and quadrupole splitting values of the resulting complexes are in correspondence with the strong sigma-donor character of the amido anion linked to the iron atom. For comparison, the Mossbauer parameters for hemin complexes with arginine and 2-aminoguanidine, which also have pure sigma interaction with the porphyrin iron, were included and discussed MH - Cuba MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0340-4285 UR - ISI:000221360700020 L2 - PARENT AMIDORUTHENIUM COMPLEX; BIS-LIGATED COMPLEXES; HIGH PH VALUES; SPECTROSCOPIC CHARACTERIZATION; MOSSBAUER SPECTRA; CYTOCHROME-B; MECHANOCHEMICAL SYNTHESIS; NITROGENOUS BASES; CRYSTAL-STRUCTURE; AQUEOUS-SOLUTION SO - Transition Metal Chemistry 2004 ;29(4):451-456 12163 UI - 5651 AU - Reguera E AU - Fernandez-Bertran J AU - Paneque A AU - Yee-Madeira H AD - Univ Havana, Inst Mat & Reagents, Havana 10400, CubaCtr Pharmaceut Chem, Havana, CubaInst Polytecn Nacl Mexico, Sch Math & Phys, Mexico City, DF, MexicoReguera, E, Univ Havana, Inst Mat & Reagents, San Lazaro & L, Havana 10400, Cuba TI - Mechanochemical reaction between the probe and the matrix: A possible source of errors when IR spectra of alkali acid bifluorides are recorded in alkali halide pressed disks AB - The mechano-chemical reactions of alkali acid bifluorides (MHF2), with alkali halides (MX), were studied by x-ray diffraction (XRD) and IR spectroscopy. The reactions were carried out by milling the solid reagents in equimolar ratio by hand in an agate mortar. LiHF2 is unstable on milling and decomposes to LiF and HE . Rb, Cs, and NH4 acid bifluorides react KBr leading to the corresponding bromides and stable KHF2. Similar reactions are observed with Na halides, leading to NaHF2. NaHF2 reacts with KF to form KHF2 and NaF. The mechano-chemical reactions with alkali halides are considered in connection with the use of alkali halides as matrices for IR spectroscopy MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Spectroscopy U5 - J;Article AV - English IS - 0038-7010 UR - ISI:000220931700011 L2 - acid bifluorides;alkali halides;IR spectroscopy;X-ray diffraction;mechanochemistry;VIBRATIONAL DYNAMICS; FLUORIDES; ION SO - Spectroscopy Letters 2004 ;37(2):191-199 12164 UI - 6577 AU - Reif JC AU - Xia XC AU - Melchinger AE AU - Warburton ML AU - Hoisington DA AU - Beck D AU - Bohn M AU - Frisch M AD - Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyUniv Illinois, Dept Crop Sci, Urbana, IL 61801, USAInt Maize & Wheat Improvement Ctr, CIMMYT, Mexico City 06600, DF, MexicoChinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Beijing 100081, Peoples R ChinaMelchinger, AE, Univ Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, Germany TI - Genetic diversity determined within and among CIMMYT maize populations of tropical, subtropical, and temperate germplasm by SSR markers AB - Genetic diversity in maize (Zea mays L.) plays a key role for future breeding progress. The main objectives of our study were to (i) investigate the genetic diversity within and among CIMMYT maize populations by simple sequence repeat (SSR) markers, (ii) examine genotype frequencies for deviations from Hardy-Weinberg equilibrium (HWE) at individual loci, and (iii) test for linkage disequilibrium (LD) between pairs of loci. Twenty-three maize populations and pools established in 1974, which mostly comprise germplasm from different racial complexes adapted to tropical, subtropical intermediate-maturity, subtropical early-maturity, and temperate megaenvironments (ME), were fingerprinted by 83 SSR markers covering the entire maize genome. Across all populations, 27% of the SSR markers deviated significantly from HWE with an excess of homozygosity in 99% of the cases. We observed no evidence for genome-wide LD among pairs of loci within each of the seven tropical populations analyzed. Estimates of genetic differentiation (G(ST)) between populations within MEs averaged 0.09 and revealed that most of the molecular variation was found within the populations. Principal coordinate analysis based on allele frequencies of the populations revealed that populations adapted to the same ME clustered together and, thus, supported clearly the ME structure MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000187633900044 L2 - ZEA-MAYS-L; LINKAGE DISEQUILIBRIUM; HARDY-WEINBERG; RFLP; LOCI; IDENTIFICATION; POLYMORPHISMS; ISOZYME; LINES SO - Crop Science 2004 ;44(1):326-334 12165 UI - 4196 AU - Reimann B AD - Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, GermanyUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoReimann, B, Max Planck Inst Gravitat Phys, Albert Einstein Inst, Muhlenberg 1, D-14476 Golm, Germany TI - Slice stretching at the event horizon when geodesically slicing the Schwarzschild spacetime with excision AB - Slice-stretching effects are discussed as they arise at the event horizon when geodesically slicing the extended Schwarzschild black-hole spacetime while using singularity excision. In particular, for Novikov and isotropic spatial coordinates, the outward movement of the event horizon ('slice sucking') and the unbounded growth there of the radial metric component ('slice wrapping') are analysed. For the overall slice stretching, very similar late-time behaviour is found when comparing with maximal slicing. Thus, the intuitive argument that attributes slice stretching to singularity avoidance is incorrect.Slice-stretching effects are discussed as they arise at the event horizon when geodesically slicing the extended Schwarzschild black-hole spacetime while using singularity excision. In particular, for Novikov and isotropic spatial coordinates, the outward movement of the event horizon ('slice sucking') and the unbounded growth there of the radial metric component ('slice wrapping') are analysed. For the overall slice stretching, very similar late-time behaviour is found when comparing with maximal slicing. Thus, the intuitive argument that attributes slice stretching to singularity avoidance is incorrect MH - Germany MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000224423300002 L2 - BLACK-HOLE; RELATIVITY SO - Classical and Quantum Gravity 2004 ;21(18):4297-4303 12166 UI - 4910 AU - Reimann B AU - Brugmann B AD - Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Golm, GermanyUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoPenn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802, USAReimann, B, Albert Einstein Inst, Max Planck Inst Gravitat Phys, Muhlenberg 1, D-14476 Golm, Germany TI - Late time analysis for maximal slicing of Reissner-Nordstrom puncture evolutions AB - We perform an analytic late time analysis for maximal slicing of the Reissner-Nordstrom black hole spacetime. In particular, we discuss the collapse of the lapse in terms of its late time behavior at the throat and at the event horizon for the even and the puncture lapse. In the latter case we also determine the value of the lapse at the puncture. Furthermore, in the limit of late times slice stretching effects are studied as they arise for maximal slicing of puncture evolutions. We perform numerical experiments for a Schwarzschild black hole with puncture lapse and find agreement with the analytical results MH - Germany MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000222681600049 L2 - BLACK-HOLE; NUMERICAL RELATIVITY; SPACETIME SO - Physical Review D 2004 ;69(12): 12167 UI - 6070 AU - Reipurth B AU - Rodriguez LF AU - Anglada G AU - Bally J AD - Univ Hawaii, Inst Astron, Honolulu, HI 96822, USAUNAM, Inst Astron, Morelia 58089, Michoacan, MexicoCSIC, Inst Astrofis Andalucia, E-18008 Granada, SpainUniv Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309, USAReipurth, B, Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA TI - Radio continuum jets from protostellar objects AB - We have carried out a deep, 3.6 cm radio continuum survey of young outflow sources using the Very Large Array in its A configuration providing subarcsecond resolution. The eight regions observed are Haro 6-10 and L1527 IRS in Taurus, Haro 5a/6a in OMC 2/3, NGC 2023 MMS, NGC 2264 IRS1, HH 108 IRAS/MMS in Serpens, L1228, and L1251A. In combination with our similar and previously published maps of eight other star-forming regions, we find only one region with a single source, while the other 15 regions have on average 3.9 nearby sources. This supports the view that isolated star formation is rare. We have selected 21 objects, which are all young mostly Class I sources, and find a binary frequency of 33% in the separation range from 0."5 to 12". This is within the uncertainties comparable to the observed binary frequency among T Tauri stars in a similar separation range. Seven of the 21 sources drive giant Herbig-Haro flows. Four of these seven are known to have companions ( three are triple systems), corresponding to 57%. We discuss these results in relation to the hypothesis that giant Herbig-Haro flows are driven by disintegrating multiple systems MH - USA MH - Mexico|Michoacan MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000220081700039 L2 - binaries : general;ISM : jets and outflows;radio continuum : ISM;stars : formation;stars : pre-main-sequence;STAR-FORMING REGIONS; HARO ENERGY-SOURCES; TELESCOPE NICMOS IMAGES; YOUNG STELLAR OBJECTS; NGC 2264 IRS; VLA DETECTION; MOLECULAR OUTFLOWS; EXCITING SOURCES; AMMONIA OBSERVATIONS; SPECTRAL INDEXES SO - Astronomical Journal 2004 ;127(3):1736-1746 12168 UI - 3749 AU - Reis VM AU - Estrada-de los Santos P AU - Tenorio-Salgado S AU - Vogel J AU - Stoffels M AU - Guyon S AU - Mavingui P AU - Baldani VLD AU - Schmid M AU - Baldani JI AU - Balandreau J AU - Hartmann A AU - Caballero-Mellado J AD - EMBRAPA Agrobiol, Ctr Nacl Pesquisa Agrobiol, BR-23851970 Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Ctr Invest Sobre Fijac Nitrogeno, Cuernavaca 62191, Morelos, MexicoSASA Expt Stn, ZA-4300 Mt Edgecombe, KZN, South AfricaGSF, Natl Res Ctr Environm & Hlth, Inst Soil Ecol, Dept Rhizosphere Biol, D-85764 Munich, GermanyUniv Lyon 1, CNRS, UMR 5557, F-69622 Villeurbanne, FranceCaballero-Mellado, J, EMBRAPA Agrobiol, Ctr Nacl Pesquisa Agrobiol, Km 47,Seropedica, BR-23851970 Rio De Janeiro, Brazil TI - Burkholderia tropica sp nov., a novel nitrogen-fixing, plant-associated bacterium AB - In an ecological survey of nitrogen-fixing bacteria isolated from the rhizosphere and as endophytes of sugarcane, maize and teosinte plants in Brazil, Mexico and South Africa, a new phylogenetically homogeneous group of N-2-fixing bacteria was identified within the genus Burkholderia. This polyphasic taxonomic study included microscopic and colony morphology, API 20NE tests and growth on different culture media at different pH and temperatures, as well as carbon source assimilation tests and whole-cell protein pattern analysis. Analysis of 16S rRNA gene sequences showed 99(.)2-99(.)9% similarity within the novel species and 97(.)2% similarity to the closest related species, Burkholderia sacchari. The novel species was composed of four distinct amplified 16S rDNA restriction analysis groups. The DNA-DNA reassociation values within the novel species were greater than 70% and less than 42% for the closest related species, B. sacchari. Based on these results and on many phenotypic characteristics, a novel N-2-fixing species is proposed for the genus Burkholderia, Burkholderia tropica sp. nov., with the type strain Ppe8T (=ATCC BAA-831(T) =LMG 22274(T) = DSM 15359(T)). B. tropica was isolated from plants grown in geographical regions with climates ranging from temperate subhumid to hot humid MH - Brazil MH - France MH - Germany MH - Mexico|Morelos MH - South Africa PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 23 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000225366000044 L2 - 16S RIBOSOMAL DNA; POLYPHASIC TAXONOMY; CYSTIC-FIBROSIS; LEGUMES; CEPACIA; SOIL; RNA; DIVERSITY; PROPOSAL; VIETNAM SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():2155-2162 12169 UI - 4468 AU - Rejon LAS AU - Romero JL AD - Plantese SPR RL CV, Gerente Forestal, Carmen, Campeche, MexicoN Carolina State Univ, Grinnells Lab, CAMCORE Cooperat, Raleigh, NC 27695, USARejon, LAS, Plantese SPR RL CV, Gerente Forestal, Carr Escarcega Villahermosa Km 246, Carmen, Campeche, Mexico TI - Plantations of Gmelina arborea in southern Mexico AB - PetroCam is a forest products company with land in Campeche, Mexico. It has established 1300 ha of Gmelina arborea (gmelina) on degraded pasturelands and is currently establishing 300 ha of plantations year(-1) on an 8-year rotation. Seeds for the program come from a locally developed land race with origins from India. Trees are planted at 3 x 3m spacing, are fertilized 15 days after establishment, and are pruned and thinned several times during the rotation. Average productivity using the current landrace material is approximately 25 m(3) ha(-1) year(-1). The end product is high quality furniture for export. Genetic material from CAMCORE, North Carolina State University will greatly broaden the genetic base of this program in the future MH - Mexico|Campeche MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Forestry U5 - J;Article AV - English IS - 0169-4286 UR - ISI:000223771400018 L2 - plantation management;silviculture SO - New Forests 2004 ;28(2-3):293-297 12170 UI - 6021 AU - rellano-Reynoso B AU - az-Aparicio E AU - Leal-Hernandez M AU - Hernandez L AU - Gorvel JP AD - CNRS Marseille Luminy, INSERM, Ctr Immunol, F-13288 Marseille 9, FranceInst Nacl Invest Forestales Agr & Pecuarias, CENID Microbiol, Proyecto Brucelosis, Cuajimalpa 05110, DF, MexicoUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Cuautitlan 54740, Estado Mexico, MexicoGorvel, JP, CNRS Marseille Luminy, INSERM, Ctr Immunol, Case 906, F-13288 Marseille 9, France TI - Intracellular trafficking study of a RB51 B-abortus vaccinal strain isolated from cow milk AB - Brucella is responsible for one of the major worldwide zoonoses. Over the last century, several vaccines have been used against brucellosis. Among these, the rough vaccine Brucella abortus RB51 was introduced with the idea that it would not interfere with the diagnosis of brucellosis. Recently, RB51 has been isolated from milk and vaginal exudates from vaccinated cows, thus raising the possibility of extensive bacterial replication in these animals. We hypothesized that shedding of RB51 might be related to a change in its intracellular cell cycle. Therefore, we have compared the intracellular trafficking in CHO cells of the virulent B. abortus 2308 and two RB51 strains, the vaccinal strain and the one isolated from cow milk. Both RB51 strains were transiently observed in phagosomes characterized by the presence of the early endosomal marker EEA1 and then were found in cathepsin D-enriched lysosomal compartments, in which they eventually underwent degradation at later post-infection times. In contrast, the virulent 2308 strain replicated within the endoplasmic reticulum. These results suggest that a change in intracellular trafficking cannot account for Brucella shedding in adult vaccinated cows. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Microbiology;Veterinary Sciences U5 - J;Article AV - English IS - 0378-1135 UR - ISI:000220036700013 L2 - Brucella abortus;RB51 vaccine;intracellular trafficking;BRUCELLA-ABORTUS; ENDOPLASMIC-RETICULUM; CATTLE SO - Veterinary Microbiology 2004 ;98(3-4):307-312 12171 UI - 3811 AU - Rencurosi A AU - Mitchell EP AU - Cioci G AU - Perez S AU - Pereda-Miranda R AU - Imberty A AD - Univ Nacl Autonoma Mexico, Dept Farm, Fac Quim, Coyoacan 04510, DF, MexicoUniv Grenoble 1, CNRS, CERMAV, F-38041 Grenoble 9, FranceEuropean Synchrotron Radiat Facil, Expt Div, F-38043 Grenoble 9, FrancePereda-Miranda, R, Univ Nacl Autonoma Mexico, Dept Farm, Fac Quim, Ciudad Univ, Coyoacan 04510, DF, Mexico TI - Crystal structure of tricolorin A: Molecular rationale for the biological properties of resin glycosides found in some Mexican herbal remedies MH - France MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1433-7851 UR - ISI:000225337000009 L2 - conformation analysis;glycolipids;glycosides;natural products;structure elucidation;IPOMOEA-TRICOLOR; FORCE-FIELD; OLIGOSACCHARIDES; CONVOLVULACEAE; METATHESIS; INHIBITOR; MECHANICS; MM3 SO - Angewandte Chemie-International Edition 2004 ;43(44):5918-5922 12172 UI - 4930 AU - Renno NO AU - Abreu VJ AU - Koch J AU - Smith PH AU - Hartogensis OK AU - De Bruin HAR AU - Burose D AU - Delory GT AU - Farrell WM AU - Watts CJ AU - Garatuza J AU - Parker M AU - Carswell A AD - Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109, USAUniv Arizona, Lunar & Planetary Sci Lab, Tucson, AZ 85721, USAUniv Wageningen & Res Ctr, Dept Environm Sci, Wageningen, NetherlandsUniv Calif Berkeley, Space Phys Lab, Berkeley, CA 94720, USANASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USAIMADES, Hermosillo, Sonora, MexicoITSON, Obregon, MexicoRincon Res Corp, Tucson, AZ, USAOptech Corp, Toronto, ON, CanadaRenno, NO, Univ Michigan, Dept Atmospher Ocean & Space Sci, 2455 Hayward St, Ann Arbor, MI 48109 USA TI - MATADOR 2002: A pilot field experiment on convective plumes and dust devils AB - [ 1] Recent research suggests that mineral dust plays an important role in terrestrial weather and climate, not only by altering the atmospheric radiation budget, but also by affecting cloud microphysics and optical properties. In addition, dust transport and related Aeolian processes have been substantially modifying the surface of Mars. Dusty convective plumes and dust devils are frequently observed in terrestrial deserts and are ubiquitous features of the Martian landscape. There is evidence that they are important sources of atmospheric dust on both planets. Many studies have shown that on a small scale, dust sourcing is sensitive to a large number of factors, such as soil cover, physical characteristics, composition, topography, and weather. We have been doing comparative studies of dust events on Earth and Mars in order to shed light on important physical processes of the weather and climate of both planets. Our 2002 field campaign showed that terrestrial dust devils produce heat and dust fluxes two and five orders of magnitude larger than their background values. It also showed that charge separation within terrestrial dust devils produces strong electric fields that might play a significant role in dust sourcing. Since Martian dust devils and dust storms are stronger and larger than terrestrial events, they probably produce even stronger fluxes and electric fields MH - Canada MH - Mexico|Sonora MH - USA MH - Netherlands PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 15 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000222656600001 L2 - aerosol;convection;dust devil;MARS ORBITER CAMERA; PATHFINDER; VORTICES; AIRCRAFT; SURFACE; STORMS; LAYER SO - Journal of Geophysical Research-Planets 2004 ;109(E7): 12173 UI - 4567 AU - Renwick WH AU - Smith SV AU - Sleezer RO AU - Buddemeier RW AD - Miami Univ, Dept Geog, Oxford, OH 45056, USACtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoEmporia State Univ, Dept Earth Sci, Emporia, KS 66801, USAUniv Kansas, Kansas Geol Survey, Lawrence, KS 66047, USARenwick, WH, Miami Univ, Dept Geog, Oxford, OH 45056, USA TI - Comment on "Managing soil carbon" (II) MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Editorial Material AV - English IS - 0036-8075 UR - ISI:000223891200022 L2 - EROSION; DEPOSITION; SEDIMENTS SO - Science 2004 ;305(5690): 12174 UI - 1673 AU - Retana-Ugalde R AU - Casanueva E AU - tamirano-Lozano MA AU - Gonzalez-Torres C AU - Mendoza-Nunez VM AD - UNAM, FES Zaragoza, Unidad Invest Gerontol, Zaragoza, SpainUNAM, FES Zaragoza, UIGEN, Zaragoza, SpainUniv Autonoma Metropolitana Iztapalapa, Iztapalapa, Mexico TI - Antioxidant activity and DNA damage in older subjects of urban vs. rural areas MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0891-5849 UR - ISI:000225458900344 SO - Free Radical Biology and Medicine 2004 ;37():S111-S112 12175 UI - 3346 AU - Revah S AU - Auria R AD - Univ Autonoma Metropolitana Iztapalapa, Dept Proc Engn, Mexico City 09340, DF, MexicoUniv Aix Marseille 1, Lab IRD Microbiol, CESB, ESIL, F-13288 Marseille 9, FranceRevah, S, Univ Autonoma Metropolitana Iztapalapa, Dept Proc Engn, Apdo Postal 55-5324, Mexico City 09340, DF, Mexico TI - Biological treatment of polluted air emissions MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000225982900017 L2 - TERT-BUTYL ETHER; BIOTRICKLING FILTERS; PHASE BIOREACTOR; SCALE BIOFILTER; TOLUENE VAPORS; PERFORMANCE; BIOFILTRATION; REMOVAL; BIODEGRADATION; GASOLINE SO - Petroleum Biotechnology: Developments and Perspectives 2004 ;151():479-493 12176 UI - 4637 AU - Reyes-Betanzo C AU - Moshkalyov SA AU - Ramos ACS AU - Swart JW AD - INAOE, Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUNICAMP, CCS, BR-13083970 Campinas, SP, BrazilUniv Estadual Campinas, IFGW, BR-13083970 Campinas, SP, BrazilReyes-Betanzo, C, INAOE, Inst Nacl Astrofis Opt & Elect, Apdo Postal 51, Puebla 72000, Mexico TI - Mechanisms of silicon nitride etching by electron cyclotron resonance plasmas using SF6- and NF3-based gas mixtures AB - The results of a study of SiNx, SiO2, and Si etching in a high-density electron cyclotron resonance plasma using mixtures containing SF6, NF3, N-2, O-2, and Ar are presented. Higher selectivities of SiNx, etching over SiO2 (up to similar to100) were achieved with NF3, while higher selectivities over Si (up to 5-10) were obtained with SF6-based mixtures. Plasma and surface processes responsible for etching are analyzed, and mechanisms of nitride etching in NF3-based plasmas are proposed. (C) 2004 American Vacuum Society MH - Brazil MH - Mexico|Puebla PB - MELVILLE: A V S AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Coatings & Films;Physics, Applied U5 - J;Article AV - English IS - 0734-2101 UR - ISI:000223322000073 L2 - DIOXIDE SO - Journal of Vacuum Science & Technology A 2004 ;22(4):1513-1518 12177 UI - 4152 AU - Reyes-Chilpa R AU - Rivera J AU - Oropeza M AU - Mendoza P AU - Amekraz B AU - Jankowski C AU - Campos M AD - Hosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Inst Mexicano Suguro Social, Unidad Invest Med Farmacol, Mexico City 03100, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Circuito Exterior Ciudad Univ, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Estac Biol Trop Los Tuxtlas, Inst Biol, San Andres Tuxtla 95701, Veracruz, MexicoUniv Moncton, Dept Chim & Biochem, Moncton, NB E1A 3E9, CanadaCampos, M, Hosp Especialidades Ctr Med La Raza, Ctr Med Nacl Siglo 21, Inst Mexicano Suguro Social, Unidad Invest Med Farmacol, San Francisco 350-502 Col Valle, Mexico City 03100, DF, Mexico TI - Methanol extracts of Hamelia patens containing oxindole alkaloids relax KCl-induced contraction in rat myometrium AB - Hamelia patens JAQC. (Rubiaceae) is a medicinal bush widely distributed in tropical areas of the American continent. It is used in Mexican Traditional Medicine for the treatment of menstrual disorders, therefore suggesting that its chemical constituents may have some effect on myometrium contractility. Physiological effects might differ due to quantitative variations in the content of alkaloids arisisng from its wide geographical distribution. To test this hypothesis, the content of oxindole alkaloids in methanol extracts of five different samples collected in Mexico was quantified by GC-MS. Each extract was assayed on contractility of estrogen-primed rat myometrium. Variations in the content of alkaloids were observed among the different samples. All samples relaxed in a concentration-dependent manner the high KCI-induced contraction in rat myometrium. Those which lack rumberine and/or maruquine displayed a higher relaxant effect than samples containing them, suggesting that these alkaloids might counteract the effects of isopteropodine. However, in contrast with verapamil, Hamelia patens metanol extracts are poor relaxants MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - TOKYO: PHARMACEUTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0918-6158 UR - ISI:000224522100025 L2 - Hamelia patens;Rubiaceae;medicinal plant;oxindole alkaloid;rat myometrium;Mexico;MECHANISMS SO - Biological & Pharmaceutical Bulletin 2004 ;27(10):1617-1620 12178 UI - 4811 AU - Reyes-Chilpa R AU - Estrada-Muniz E AU - Apan TR AU - Amekraz B AU - Aumelas A AU - Jankowski CK AU - Vazquez-Torres M AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Moncton, Dept Chem & Biochem, Moncton, NB E1A 3E9, CanadaUniv Veracruzana, Inst Invest Biol, Xalapa 91000, Veracruz, MexicoReyes-Chilpa, R, Univ Nacl Autonoma Mexico, Inst Quim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Cytotoxic effects of mammea type coumarins from Calophyllum brasiliense AB - Calophyllum brasiliense (Clusiaceae) is a big tree from the Tropical Rain Forests of the American continent. The organic extracts from the leaves yielded coumarins of the mammea type: mammea A/BA, A/BB, B/BA, B/BB, C/OA, C/OB, B/BA cyclo F, B/BB cyclo F, and isomammeigin. The triterpenoids friedelin and canophyllol, as well as the biflavonoid amentoflavone, protocatechuic and shikimic acids, were also obtained. Most of the isolated compounds were tested in vitro against K562, U251, and PO human tumor cell lines. The coumarins were cytotoxic against the three cell lines, the highest activity was shown by mammea A/BA (IC50 = 0.04 to 0.59 muM). The mixtures of mammea A/BA + A/BB, mammea B/BA + B/BB and mammea C/OA + C/OB were also highly active (IC50 < 4.05 muM). Friedelin was cytotoxic only against PC3, and U251 lines. Inhibition of HIV-1 reverse transcriptase was also assayed in vitro; however, none of the tested compounds (250 muM) prevented the activity of this enzyme. Most of the isolated compounds were also inactive against fourteen bacterial strains; however mammea A/BA + A/BB, and mammea C/OA + C/OB inhibited the growth of Staphylococcus aureus, S. epidermidis and Bacillus subtilis. (C) 2004 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Veracruz PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 9 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000222962300009 L2 - Calophyllum brasiliense;clusiaceae;mammea;coumarins;triterpenoids;biflavonoids;cytotoxic activity;tumor cell lines;HIV;reverse transcriptase;enterobacteria;INHIBITORY NATURAL-PRODUCTS; HIV-1 REVERSE-TRANSCRIPTASE; AMERICANA L; CELL-LINE; ASSAY; XANTHONES; EXTRACTIVES; DERIVATIVES; LANIGERUM; ESCULETIN SO - Life Sciences 2004 ;75(13):1635-1647 12179 UI - 4520 AU - Reyes-Gomez J AU - Medina JA AU - Jeerage KM AU - Steen WA AU - Schwartz DT AD - Univ Guadalajara, Dept Quim, Guadalajara 44420, Jalisco, MexicoUniv Washington, Dept Chem Engn, Seattle, WA 98195, USAReyes-Gomez, J, Univ Guadalajara, Dept Quim, Guadalajara 44420, Jalisco, Mexico TI - High capacity SiO2-graphite composite electrodes with chemically incorporated metal MHCFs for electrochemically switched alkaline cation exchange AB - Bulk metal hexacyanoferrate (MHCF) has been synthesized within the porous microstructure of conductive composite materials using a simple chemical procedure. The composite materials consist of micrometer-size graphite particles encapsulated in a SiO2 solid matrix using a sol-gel technique. A strong electrochemical signal from the chemically treated composites is associated with electrochemically switched alkaline-cation exchange. The exchange capacity of these composite electrodes exceeds by more than two orders of magnitude that of thin-film MHCF electrodes of comparable dimensions. The effects of some fabrication parameters on the cation-exchange capacity and on the distribution of the hexacyanoferrate within the composite electrodes are presented. (C) 2004 The Electrochemical Society MH - Mexico|Jalisco MH - USA PB - PENNINGTON: ELECTROCHEMICAL SOC INC RP - NOT IN FILE U3 - TC 2 U4 - Electrochemistry;Materials Science, Coatings & Films U5 - J;Article AV - English IS - 0013-4651 UR - ISI:000223622000053 L2 - HEXACYANOFERRATE THIN-FILMS; IMAGING RAMAN-SPECTROSCOPY; NICKEL HEXACYANOFERRATE; ION-EXCHANGE; CHARGE-TRANSFER; DERIVATIZED INTERFACE; SURFACES; FERROCYANIDES; INTERCALATION; SEPARATIONS SO - Journal of the Electrochemical Society 2004 ;151(9):D87-D92 12180 UI - 4450 AU - Reyes-Grajeda JP AU - Moreno A AU - Romero A AD - CSIC, Dept Estructura & Func Prot, Ctr Invest Biol, Madrid 28040, SpainUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoRomero, A, CSIC, Dept Estructura & Func Prot, Ctr Invest Biol, Ramiro Maeztu 9, Madrid 28040, Spain TI - Crystal structure of ovocleidin-17, a major protein of the calcified Gallus gallus eggshell - Implications in the calcite mineral growth pattern AB - Ovocleidin-17 (OC17) from Gallus gallus is one of the best candidates to control and regulate the deposition of calcium carbonate in the calcified eggshell layer. Here, the crystal structure of monomeric OC17, determined at a resolution of 1.5 Angstrom, was refined to a crystallographic R-factor of 20.1%. This is the first protein directly involved in a non-pathological biomineralization process resolved by x-ray diffraction to date. The protein has a mixed alpha/beta structure containing a single C-type lectin-like domain. However, although OC17 shares the conserved scaffold of the C-type lectins, it does not bind carbohydrates. Nevertheless, in vitro OC17 modifies the crystalline habit of calcium carbonate (CaCO3) and the pattern of crystal growth at intervals of 5-200 mug/ml. Determining the three-dimensional structure of OC17 contributes to a better understanding of the biological behavior of structurally related biomolecules and of the mechanisms involved in eggshell and other mineralization processes MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000223916800083 L2 - AMINO-ACID-SEQUENCE; HALIOTIS-LAEVIGATA; MATRIX; BIOMINERALIZATION; LITHOSTATHINE; LOCALIZATION; PURIFICATION; COMPONENT; PERLUCIN; PROGRAM SO - Journal of Biological Chemistry 2004 ;279(39):40876-40881 12181 UI - 4525 AU - Reyes-Melo E AU - Martinez-Vega J AU - Guerrero-Salazar C AU - Ortiz-Mendez U AD - Univ Toulouse 3, Lab Genie Elect, CNRS, UMR 5003, F-31062 Toulouse, FranceUniv Autonoma Nuevo Leon, San Nicolas de los Garza 66450, NL, MexicoMartinez-Vega, J, Univ Toulouse 3, Lab Genie Elect, CNRS, UMR 5003, 118 Route Narbonne, F-31062 Toulouse, France TI - On the modeling of the dynamic-elastic modulus for polymer materials under isochronal conditions AB - A model based on the concept of fractional calculus is proposed for the description of the dynamic elastic modulus, E* = E' + iE", of polymer materials. This model takes into account three relaxation phenomena (alpha, beta, and gamma) under isochronal conditions. The differential equations obtained for this model have derivatives of fractional order between 0 and 1. Applying the Fourier transform to the fractional differential equations and associating each relaxation mode to cooperative or noncooperative movements, E*(iomega,T) was evaluated. The isochronal diagrams of E' and E" clearly show three relaxation phenomena, each of them is manifested by a decrease of E' when temperature increases. This decrease is associated with a maximum in E*(T) diagram for each relaxation mode. The shape of the three peaks (three maxima in E"(T) diagrams) depends of the fractional orders of this new fractional model. The mathematical description obtained of E* corresponds to a nonexponential relaxation behavior often encountered in the dynamics of polymer systems having three relaxation phenomena. This model will enable us to analyze the viscoelastic behavior of polymers. (C) 2004 Wiley Periodicals, Inc MH - France MH - Mexico|Nuevo Leon PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000223599200031 L2 - modeling;viscoelastic properties;mechanical properties;relaxation;polymers;FRACTIONAL CALCULUS APPROACH; GLASS-FORMING MATERIALS; VISCOELASTIC BEHAVIOR; AMORPHOUS POLYMERS; RELAXATION; EQUATIONS; STRESS SO - Journal of Applied Polymer Science 2004 ;94(2):657-670 12182 UI - 4382 AU - Reyes-Melo ME AU - Martinez-Vega JJ AU - Guerrero-Salazar CA AU - Ortiz-Mendez U AD - Univ Toulouse 3, CNRS, UMR 5003, Lab Genie Elect, F-31062 Toulouse, FranceUniv Autonoma Nuevo Leon, Doctorado Ingn Mat, San Nicolas De Los Garza 66450, NL, MexicoReyes-Melo, ME, Univ Toulouse 3, CNRS, UMR 5003, Lab Genie Elect, 118 Route Narbonne, F-31062 Toulouse, France TI - Modelling of relaxation phenomena in organic dielectric materials. application of differential and integral operators of fractional order AB - in this work we have used differential and integral operators of fractional order (between 0 and 1) for modelling the real and imaginary parts of E* and epsilon(T)* considering the three more important relaxation phenomena in semi-crystalline polymers. To justify the validity of the proposed models we have used measurements of E* and epsilon(T)* under isochronal conditions of a semi-crystalline specimen of PEN in a broad temperature range MH - France MH - Mexico|Nuevo Leon PB - BUCHAREST-MAGURELE: NATL INST OPTOELECTRONICS RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Optics;Physics, Applied U5 - J;Article AV - English IS - 1454-4164 UR - ISI:000224105200050 L2 - relaxation phenomena;polymers;fractional calculus;GLASS-FORMING MATERIALS; BEHAVIOR SO - Journal of Optoelectronics and Advanced Materials 2004 ;6(3):1037-1043 12183 UI - 4342 AU - Reyes-Reyes M AU - Grobert N AU - Kamalakaran R AU - Seeger T AU - Golberg D AU - Ruhle M AU - Bando Y AU - Terrones H AU - Terrones M AD - IPICYT, Adv Mat Dept, San Luis Potosi 78216, MexicoUniv Sussex, CEPS, Fullerene Sci Ctr, Brighton BN1 9QJ, E Sussex, EnglandMax Planck Inst Met Res, D-70569 Stuttgart, GermanyNatl Inst mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, JapanNatl Inst mat Sci, ICYS, Tsukuba, Ibaraki 3050044, JapanTerrones, M, IPICYT, Adv Mat Dept, Camino Presa Jose 2055,Col Lomas 4A Secc, San Luis Potosi 78216, Mexico TI - Efficient encapsulation of gaseous nitrogen inside carbon nanotubes with bamboo-like structure using aerosol thermolysis AB - High yields of dense, 'clean' and uniform arrays of well-aligned carbon nanotubes, with bamboo-like structure encapsulating gaseous nitrogen, were obtained by thermolyzing uniform aerosols of ferrocene/benzylamine solutions at 850 degreesC. Electron energy loss spectroscopy (EELS) studies reveal that up to 90% of these tubes contain molecular nitrogen in their cores. The materials were characterized by scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy, and EELS elemental mappings using an Omega Filter microscope. We envisage the material useful for storing large concentrations of relatively heavy gases such as nitrogen in confined volumes. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Germany MH - Japan MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0009-2614 UR - ISI:000223972300030 L2 - PYROLYSIS; NANOPARTICLES; NANOFIBERS; NANOWIRES; MIXTURES; HYDROGEN; STORAGE; ARRAYS SO - Chemical Physics Letters 2004 ;396(1-3):167-173 12184 UI - 5037 AU - Reyes-Sandoval A AU - Fitzgerald JC AU - Grant R AU - Roy S AU - Xiang ZQ AU - Li Y AU - Gao GP AU - Wilson JM AU - Ertl HCJ AD - Wistar Inst Anat & Biol, Philadelphia, PA 19104, USAInst Politecn Nacl, Programa Inst Biomed Mol, Mexico City, DF, MexicoUniv Penn, Sch Med, Div Med Genet, Gene Therapy Program, Philadelphia, PA 19104, USAErtl, HCJ, Wistar Inst Anat & Biol, 3601 Spruce St, Philadelphia, PA 19104 USA TI - Human immunodeficiency virus type 1-specific immune responses in primates upon sequential immunization with adenoviral vaccine carriers of human and simian serotypes AB - Two triple immunization vaccine regimens with adenoviral vectors with El deleted expressing Gag of human immunodeficiency virus type 1 were tested for induction of T- and B-cell-mediated-immune responses in mice and in nonhuman primates. The vaccine carriers were derived from distinct serotypes of human and simian adenoviruses that fail to elicit cross-neutralizing antibodies expected to dampen the effect of booster immunizations. Both triple immunization regimens induced unprecedented frequencies of gamma interferon-producing CD8+ T cells to Gag in mice and monkeys that remained remarkably stable over time. In addition, monkeys developed Gag-specific interleukin-2-secreting T cells, presumably belonging to the CD4(+) T-cell subset, and antibodies to both Gag and the adenoviral vaccine carriers MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 39 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000222407200011 L2 - DENDRITIC CELLS; T-LYMPHOCYTES; VECTOR; DNA; PREVENTION; ANTIBODIES; INDUCTION; EFFICIENT; GAG; HIV SO - Journal of Virology 2004 ;78(14):7392-7399 12185 UI - 6205 AU - Reyes-Sandoval A AU - Ertl HCJ AD - Wistar Inst Anat & Biol, Philadelphia, PA 19104, USAIPN, ENMyH, Programa Inst Biomed Mol, Mexico City 07320, DF, MexicoErtl, HCJ, Wistar Inst Anat & Biol, 3601 Spruce St, Philadelphia, PA 19104 USA TI - CpG methylation of a plasmid vector results in extended transgene product expression by circumventing induction of immune responses AB - Gene therapy has the potential to cure inherited diseases if the delivered genes achieve long-term expression at therapeutic levels in the targeted tissues. Expression is commonly short-lived due to induction of cell-mediated immune responses to the gene therapy vehicle and/or the transgene product, which can be perceived as "foreign" by the host's immune system. Plasmid expression vectors have been used to deliver genes. Bacterial DNA carries immunostimulatory sequences in the form of unmethylated CpG motifs, which induce an inflammatory reaction that in turn promotes activation of transgene product-specific B and T cells. Elimination or methylation of immunostimulatory CpG sequences in plasmid expression vectors prevents the stimulation of transgene product-specific immune responses without necessarily reducing transgene expression. In this study, we tested if a CpG-methylated plasmid expression vector expressing the highly immunogenic glycoprotein of rabies virus can achieve prolonged transgene product expression by circumventing immune recognition. Our data show that mice inoculated with a CpG-methylated plasmid expression vector show delayed clearance of transfected cells and fail to mount a strong immune response to the transgene product. Gene transfer with a CpG-methylated plasmid results in a state of immunological low responsiveness to the transgene product, which may facilitate read ministration of the transgene. Nevertheless, mice remain responsive to the transgene product delivered by a viral vector MH - USA MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 18 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1525-0016 UR - ISI:000188960900015 L2 - plasmid expression vectors;gene transfer;CpG motifs;tolerance;INTERFERON-GAMMA; GENE-EXPRESSION; ADENOVIRUS VECTORS; REGULATORY-CELLS; DENDRITIC CELLS; VIRAL-ANTIGENS; CD40 LIGAND; DNA; MICE; STIMULATION SO - Molecular Therapy 2004 ;9(2):249-261 12186 UI - 5003 AU - Reyes A AU - Christian P AU - Valle J AU - Williams T AD - ECOSUR, Tapachula 30700, Chiapas, MexicoNatl Inst Stand & Biol Control, S Mimms EN6 3QG, Herts, EnglandUniv Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainWilliams, T, ECOSUR, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Persistence of Invertebrate iridescent virus 6 in soil AB - Soil represents an important reservoir for most entomopathogenic viruses. Invertebrate iridescent viruses (IIVs) (Iridoviridae) are non-occluded DNA viruses that infect agriculturally and medically important insect species, especially in damp or aquatic habitats. We used virus extraction and insect bioassay techniques to determine the effect of soil moisture and soil sterility on the persistence of Invertebrate iridescent virus 6 (IIV-6) in a soil over a 90 day period in the laboratory. Loss of activity of IIV-6 in dry soil (6.4% moisture, -1000 kPa matric potential) was very rapid and was not studied beyond 24 h. Soil moisture did not affect the rate of inactivation of virus in damp (17% moisture, -114 kPa matric potential) or wet soil (37% moisture, -9.0 kPa matric potential). In contrast, soil sterilization significantly improved the persistence of IIV-6 activity, both in damp and wet soil. Control virus suspensions retained 0.72-0.87% of original activity after 90 days, which was significantly more than the activity retained in soil. These figures represent half lives of 4.9 days for IIV-6 in non-sterile soil, 6.3 days in sterilized soil (data pooled for moisture treatments), and 12.9 days for the control virus suspension. We conclude that extra-host persistence in soil habitats may be an important aspect of the ecology of IIVs MH - United Kingdom MH - Mexico|Chiapas MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 1386-6141 UR - ISI:000222609800006 L2 - half-live;Iridoviridae;moisture;soil;sterilization;virus persistence;NUCLEAR-POLYHEDROSIS-VIRUS; IRIDESCENT VIRUS; IRIDOVIRUS INFECTION; AEDES-AEGYPTI; MOSQUITO; DISEASE; TRANSMISSION; BLACKFLIES SO - Biocontrol 2004 ;49(4):433-440 12187 UI - 2782 AU - Reyes E AU - Day JW AU - Lara-Dominguez AL AU - Sanchez-Gil P AU - Lomeli DZ AU - Yanez-Arancibia A AD - Univ New Orleans, Dept Geol & Geophys, New Orleans, LA 70148, USALouisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803, USAInst Ecol AC, Programa Recursos Costeros, Xalapa 91070, Veracruz, MexicoReyes, E, Univ New Orleans, Dept Geol & Geophys, 2000 Lakeshore Dr, New Orleans, LA 70148 USA TI - Assessing coastal management plans using watershed spatial models for the Mississippi delta, USA, and the Ususmacinta-Grijalva delta, Mexico AB - Holistic performance measures for coastal restoration are needed as management alternatives are implemented in the Gulf of Mexico. Regional questions can be addressed with watershed models using large-scale spatial dynamics to examine environmental impacts. Two watershed models investigated habitat shifts in the largest deltas of the Gulf of Mexico. One model varied river forcing scenarios in the Mississippi delta, USA, an area with restricted freshwater inputs. The other model investigated the Centla swamps, part of the Usumacinta-Grijalva delta in Mexico, a region with unrestricted freshwater inputs. Wetland conversion to open water and yearly shifts of marsh habitats in these two contrasting watersheds were assessed. Models forecasted effects of industrial development and river diversion management plans for 10 and 50 years. Results indicated that healthy functioning of both deltas depended largely on river-borne contributions. Watershed models can provide natural resource managers, decision makers with a scientific instrument for environmental policy. (c) 2005 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Veracruz PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000227621600008 L2 - SEA-LEVEL RISE; ECOSYSTEMS SO - Ocean & Coastal Management 2004 ;47(11-12):693-708 12188 UI - 5038 AU - Reyes H AU - Garcia C AU - Farfan N AU - Santillan R AU - Lacroix PG AU - Lepetit C AU - Nakatani K AD - IPN, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoCNRS, Chim Coordinat Lab, F-31077 Toulouse 04, FranceEcole Normale Super, Lab Photophys & Photochim Supramol & Macromol, CNRS, UMR8531, F-94235 Cachan, FranceReyes, H, IPN, Dept Quim, Ctr Invest & Estudios Avanzados, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Syntheses, crystal structures, and quadratic nonlinear optical properties in four "push-pull" diorganotin derivatives AB - Four "push-pull" diorganotin compounds obtained by reaction of methoxysalicylaldehyde or 4-diethylaminosalicylaldehyde, 2-amino-5-nitrophenol and dibutyltin or diphenyltin oxide are reported. The molecular structures for the diphenyl derivatives, in the solid state, show a tin in a distorted trigonal bipyramid geometry with the oxygen atoms in axial positions and the organic moieties and iminic nitrogen in equatorial ones. For the dibutyl derivative, a dimeric structure was favored due to intermolecular interactions between the tin and oxygen atoms, in this case, the tin atom shows a distorted octahedral geometry. A computational study of the diethyl derivatives constructed from the available dibutyl structure, at DFT level, revealed that the main differences between the solid and gas phases are the geometry around the tin atom and the pi-conjugated organic backbone which is nearly planar in the solid state and distorted in the gas phase. The electric field induced second-harmonic (EFISH) of the nonlinear optical (NLO) response for the dibutyl derivatives revealed that the change from boron to tin increases 1.5 times the hyperpolarizabilities (beta). (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0022-328X UR - ISI:000222416800004 L2 - diorganotin;multinuclear NMR;X-ray structure;NLO properties;DFT;TRANSITION-METAL COMPLEXES; X-RAY; AMINO-ACIDS; DISTANNOXANE; HYPERPOLARIZABILITIES; CHEMISTRY; SELECTIVITY; ACYLATION; MOLECULES; EFFICIENT SO - Journal of Organometallic Chemistry 2004 ;689(14):2303-2310 12189 UI - 3518 AU - Reyes JP AU - Hernandez-Carballo CY AU - Perez-Cornejo P AU - Meza U AU - Espinosa-Tanguma R AU - Arreola J AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78290, MexicoUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi 78210, MexicoUniv Rochester, Ctr Oral Biol, Rochester, NY 14642, USAArreola, J, Univ Autonoma San Luis Potosi, Inst Fis, Ave Dr Manuel Nava 6,Zona Univ, San Luis Potosi 78290, Mexico TI - Novel outwardly rectifying anion conductance in Xenopus oocytes AB - We describe a novel, strongly outwardly rectifying anion current in Xenopus laevis oocytes, that we have named I-Cl,I-Or. The properties of I-Cl,I-Or are different from those of any other anion conductance previously described in these cells. Typically, I-Cl,I-Or amplitude was small when extracellular Cl- (Cl-e) was the permeant anion. However, when Cl-e was replaced by lyotropic anions I-Cl,I-Or became evident as a time-independent current. I-Cl,I-Or was voltage dependent and showed a remarkable outwards rectification with little or no inwards tail current. The relative selectivity sequence determined from current amplitudes was: SCN- greater than or equal to ClO4- > I- > Br- greater than or equal toNO(3)(-) > Cl-. I-Cl,I-Or was insensitive to Gd3+ but was blocked by micromolar concentrations of niflumic acid, DIDS or Zn2+. Furthermore, I-Cl,I-Or was not affected by buffering intracellular Ca2+ with BAPTA. Low extracellular pH inhibited I-Cl,I-Or with a pK of 5.8. We propose that I-Cl,I-Or might result from activation of endogenous ClC-5-like Cl- channels present in Xenopus oocytes MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 4 U4 - Physiology U5 - J;Article AV - English IS - 0031-6768 UR - ISI:000225976500007 L2 - anion channels;Xenopus oocytes;lyotropic anions;strong outwards rectification;endogenous current;extracellular pH;DEPENDENT CHLORIDE CHANNELS; CA2+-INACTIVATED CL-CHANNEL; LAEVIS OOCYTES; FUNCTIONAL EXPRESSION; ENDOGENOUS CHLORIDE; CELL-LINE; CALCIUM; CURRENTS; CLC-5; CLONING SO - Pflugers Archiv-European Journal of Physiology 2004 ;449(3):271-277 12190 UI - 5130 AU - Reyes MR AU - Lopez-Sandoval R AU - Pastor GM AD - Inst Potosino Invest Cientif & Tecnol, San Luis Potosi 78210, MexicoUniv Toulouse 3, CNRS, Phys Quant Lab, F-31062 Toulouse, FranceLopez-Sandoval, R, Inst Potosino Invest Cientif & Tecnol, Av Venustiano Carranza 2425 A,Col Bellas Lomas, San Luis Potosi 78210, Mexico TI - Magnetic properties of small clusters as function of the geometry AB - The magnetic properties of the ground state of one- and two-dimensional small clusters (N-a = 16 sites) are studied solving exactly the Heisenberg Hamiltonian. We are interested in studying the magnetic behavior as a function of the lattice geometry. The total spin S shows an interesting behavior as a function of the ferromagnetic (antiferromagnetic) exchange interaction J(1) > 0 (J(2) < 0). Ferromagnetism is found to be stable for J(2)/J(1) similar or equal to 0-0.4. (C) 2003 Published by Elsevier B.V MH - France MH - Mexico|San Luis Potosi PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700357 L2 - Heisenberg Hamiltonian;total spin S;small cluster SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():1596-1597 12191 UI - 6181 AU - Reynoso CR AU - Mora O AU - Nieves V AU - Shimada A AU - De Mejia EG AD - Univ Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801, USAUniv Autonoma Queretaro, Sch Chem, PROPAC, Queretaro 76010, MexicoUniv Nacl Autonoma Mexico, Fac Estudios Super Duautitlan, Coordinac Gen Estudios Postgrad & Invest, Lab Rumiol & Metab Nutric, Queretaro, Mexicode Mejia, EG, Univ Illinois, Dept Food Sci & Human Nutr, 228 ERML,1201 W Gregory Dr, Urbana, IL 61801 USA TI - beta-Carotene and lutein in forage and bovine adipose tissue in two tropical regions of Mexico AB - Fresh pasture is rich in carotenoid pigments. Grazing cattle are likely to ingest substantial quantities of these pigments in their diet resulting in a yellow pigmentation of their adipose tissue. This is an undesirable characteristic in some countries such as Japan, Australia, New Zealand, and Mexico, and represents important economic losses for the producers. The objective of this study was to determine the carotenoid content of two forages (Digitaria decumbens and Cynodon dactylon) and its relation to the pigmentation of the adipose tissue of adult grass-fed cattle (crossbreds of Zebu, Brown Swiss, Charolais and Brahman) in two tropical regions of Mexico. In the dry tropics (DT), the forages contained on average 5.2 mg/100 g of beta-carotene and 6.4 mg/100 g of lutein, whereas in the humid tropics (HT) they contained 14.9 mg/100 g of beta-carotene and 18.5 mg/100 g of lutein. No significant differences in carotenoid content were found between the two forages in either region. The concentration of P-carotene in the adipose tissue of cattle grazed in HT (34.7 mug/100 g) was higher than that for cattle in DT (12.3 mug/100g). The content of beta-carotene in female animals (42 mug/100 g) was greater than that in males (26 mug/100 g). No regional or sex differences were found for lutein concentration. We conclude that climatic conditions can affect the amounts of carotenoids in forages. Furthermore, the carotenoids in pasture are deposited in cattle adipose tissue at different extents depending on the tropical region. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0377-8401 UR - ISI:000189223900015 L2 - beta-carotene;lutein;carotenoids;pasture;cattle;adipose tissue;FAT COLOR; CATTLE; CULTIVARS; STABILITY; STEERS; GOATS; HPLC; HAY SO - Animal Feed Science and Technology 2004 ;113(1-4):183-190 12192 UI - 3505 AU - rias-Carrion O AU - Murillo-Rodriguez E AU - Xu M AU - Blanco-Centurion C AU - Drucker-Colin R AU - Shiromani PJ AD - Harvard Univ, Sch Med, W Roxbury, MA 02132, USAVet Adm Med Ctr W Roxbury, W Roxbury, MA 02132, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurosci, Mexico City 04510, DF, MexicoShiromani, PJ, Harvard Univ, Sch Med, Bldg 3,Room 2C109,1400 VFW Pkwy, W Roxbury, MA 02132 USA TI - Transplantation of hypocretin neurons into the pontine reticular formation: Preliminary results AB - Study Objectives: The sleep disorder narcolepsy is now considered a neurodegenerative disease because there is a massive loss of neurons containing the neuropeptide, hypocretin, and because narcoleptic patients have very low cerebrospinal fluid levels of hypocretin. Transplants of various cell types have been used to induce recovery in a variety of neurodegenerative animal models. In models such as Parkinson disease, cell survival has been shown to be small but satisfactory. Currently, there are no data indicating whether hypocretin neurons can survive when grafted into host tissue. Here we examined the survival of hypocretin-containing neurons grafted into the pontine reticular formation, a region traditionally regarded to be key for rapid eye movement sleep generation. Design: In 2 experiments, a suspension of cells from the posterior hypothalamus of 8- to 10-day old rat pups was injected into the pons (midline, at the level of the locus coeruleus) of adult rats. Control rats received cells from the cerebellum, tissue that is devoid of hypocretin neurons. In the first experiment (n = 33), the adult rats were sacrificed 1, 3, 6, 12, 24, or 36 days after transplant, and cryostat-cut coronal sections of the brainstem were examined for presence of hypocretin-immunoreactive neurons. In the second experiment (n = 9), the transplant medium was modified to include agents that stimulate cell growth, and recipient rats were sacrificed 9, 12, and 36 days after receiving the graft. Settings: Basic neuroscience research laboratory. Measurements and Results: In the first experiment, clearly defined hypocretin-immunoreactive containing somata and varicosities were visible in pons of rats sacrificed 1 day after grafting of posterior hypothalamic cells but not in rats receiving cerebellum tissue. The hypocretin-immunoreactive somata were not visible in rats sacrificed 12, 24, or 36 days, indicating that the neurons had died. However, in the second experiment, where enriched transplant medium was used, clearly defined hypocretin-immunoreactive somata with processes and varicosities were present in the graft zone 36 days after implant. These somata were similar in size and appearance to adult rat hypocretin-immunoreactive neurons. Conclusions: These results indicate that hypocretin neurons obtain from rat pups can be grafted into a host brain, and efforts should be made to increase survival of these neurons MH - USA MH - Mexico|Distrito Federal PB - WESTCHESTER: AMER ACADEMY SLEEP MEDICINE RP - NOT IN FILE U3 - TC 6 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0161-8105 UR - ISI:000226076000008 L2 - narcolepsy;hypocretin;grafted;sleep;lateral hypothalamus;NERVOUS-SYSTEM DISORDERS; PARKINSONS-DISEASE; LATERAL HYPOTHALAMUS; CELL TRANSPLANTATION; BEHAVIORAL RECOVERY; SUBSTANTIA-NIGRA; HUMAN NARCOLEPSY; LESIONED RATS; BRAIN GRAFTS; PEPTIDES SO - Sleep 2004 ;27(8):1465-1470 12193 UI - 3707 AU - rias-Gonzalez JE AU - Galzin R AU - Harmelin-Vivien M AD - Univ Perpignan, CNRS, UMR 8046,Ctr Biol & Ecol Trop & Mediterraneene, Ecole Prat Hautes Etud, F-66860 Perpignan, FranceCtr Environm, Moorea, Fr PolynesiaCNRS, UMR 6540, Ctr Oceanol Marseille, Marine Endoume Stn, F-13007 Marseille, FranceArias-Gonzalez, JE, Ctr Invest & Estudios Avanzados, Dpto Recursos Mar, Lab Ecol Ecosistemas Arrecifes Coralinos, AP 73 Cordemex, Merida 97310, Yucatan, Mexico TI - Spatial, ontogenetic, and temporal variation in the feeding habits of the squirrelfish Sargocentron microstoma on reefs in Moorea, French Polynesia MH - Fr Polynesia MH - France MH - Mexico|Yucatan PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000225681900009 L2 - FISHES SO - Bulletin of Marine Science 2004 ;75(3):473-480 12194 UI - 6170 AU - rias-Gonzalez JE AU - Nunez-Lara E AU - Gonzalez-Salas C AU - Galzin R AD - IPN, Ctr Invest & Estudios Avanzados, Lab Ecol Arrecifes Coralinos, Unidad Merida, Merida 97310, Yucatan, MexicoUniv Perpignan, CNRS, ESA 8046, Ecole Prat Hautes Etud, F-66860 Perpignan, FranceArias-Gonzalez, JE, IPN, Ctr Invest & Estudios Avanzados, Lab Ecol Arrecifes Coralinos, Unidad Merida, AP 73 CORDEMEX, Merida 97310, Yucatan, Mexico TI - Trophic models for investigation of fishing effect on coral reef ecosystems AB - A comparison was made using general trophic models of three coral reef slopes in the Mexican Caribbean. Two reef slopes are in semi-protected areas (Boca Paila, Tampalam) and the third is subject to more intense exploitation (Mahahual). The mass-balanced models of the three reef slopes were derived from fish biomass density data obtained directly from field measurements (fish census). Other trophic groups were derived from published sources. Initial parameters for the three reef slopes were calculated using the Ecopath with Ecosim software. Comparisons of model outputs were done to establish differences between reef slope systems that are semi-protected and unprotected from fishing activities. The most significant results include: partition of production was always lowest for the unprotected reef slope; net primary production was three times higher for the semi-protected slopes than for the unprotected one; total catch in the unprotected reef slope was three and eight times higher than the two semi-protected reef slopes; food chain length increased as total catch increased; the calculated trophic level of the catch was relatively lower in the unprotected reef slope; and catch per net primary production (gross efficiency) was higher in the unprotected reef slope than the semi-protected reef slopes. It is concluded that trophic macrodescriptors can serve as a guide to the hard-to-detect negative effects of coral reef management, aid in decision-making, and emphasize the effects that structural descriptors, (e.g. total fish biomass, diversity indices) do not detect. (C) 2003 Elsevier B.V. All rights reserved MH - France MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Ecology U5 - J;Article AV - English IS - 0304-3800 UR - ISI:000189226500006 L2 - food webs;coral reefs;fishing effect;marine protected areas;reef fish;EXPLOITED ECOSYSTEMS; AQUATIC ECOSYSTEMS; FISHERIES; IMPACTS; COMMUNITIES; MANAGEMENT; DIVERSITY; BIOMASS SO - Ecological Modelling 2004 ;172(2-4):197-212 12195 UI - 4866 AU - Riba-Hernandez P AU - Stoner KE AU - Osorio D AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 48980, Michoacan, MexicoUniv Costa Rica, Escuela Biol, San Pedro, Costa RicaUniv Sussex, Sch Life Sci, Brighton BN1 9QG, E Sussex, EnglandStoner, KE, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Apartado Postal 27-3 Xangari, Morelia 48980, Michoacan, Mexico TI - Effect of polymorphic colour vision for fruit detection in the spider monkey Ateles geoffroyi, and its implications for the maintenance of polymorphic colour vision in platyrrhine monkeys AB - Most platyrrhine monkeys have an X-linked tri-allelic polymorphism for medium and long wavelength (M/L) sensitive cone photopigments. These pigments' sensitivity maxima (lambda(max)) range from 535 to 562 nm. All animals also have an autosomally coded short-wavelength-sensitive (S) cone pigment. In populations with three M/L alleles there are six different colour vision phenotypes. Heterozygous females have trichromatic colour vision, while males and homozygous females are dichromats. The selective basis for this polymorphism is not understood, but is probably affected by the costs and benefits of trichromatic compared to dichromatic colour vision. For example, it has been suggested that trichromats are better equipped than dichromats to detect fruit against a leaf background. To investigate this possibility, we modeled fruit detection by various colour vision phenotypes present in the frugivorous spider monkey, Ateles geoffroyi. Our study population is thought to have three M/L alleles with cone pigment lambda(max) values close to 535, 550 and 562 nm. The model predicted that all trichromat phenotypes had an advantage over dichromats, and the 535/562 run phenotype was best; however, the model predicted that dichromats could detect all of the fruit species consumed by spider monkeys. We conclude that the heterozygote advantage experienced by females may be the most plausible explanation for the maintenance of this polymorphism in A. geoffroyi. Nevertheless, more studies need to evaluate social foraging behaviour and the performance of different phenotypes of other New World monkeys to determine if this is a global explanation for this phenomena or more specific to A. geofforyi MH - Costa Rica MH - United Kingdom MH - Mexico|Michoacan PB - CAMBRIDGE: COMPANY OF BIOLOGISTS LTD RP - NOT IN FILE U3 - TC 14 U4 - Biology U5 - J;Article AV - English IS - 0022-0949 UR - ISI:000222883000015 L2 - Costa Rica;platyrrhines;spider monkey;Ateles geoffroyi;fruit detection;colour vision;genetic polymorphism;NEW-WORLD MONKEYS; TRICHROMATIC VISION; PRIMATES; EVOLUTION; PHOTOPIGMENTS; SELECTION; FRUGIVORY; FOLIAGE; SIZE SO - Journal of Experimental Biology 2004 ;207(14):2465-2470 12196 UI - 5084 AU - Richard FJ AU - Dejean A AU - Lachaud JP AD - Univ Toulouse 3, Lab Evolut & Divers Biol, CNRS, UMR 5174, F-31062 Toulouse, FranceUniv Toulouse 3, Ctr Rech Cognit Anim, CNRS, UMR 5169, F-31062 Toulouse, FranceCNRS, Inst Rech Biol Insecte, UMR 6053, Fac Sci & Tech, F-37200 Tours, FranceECOSUR, Tapachula 30700, Chiapas, MexicoDejean, A, Univ Toulouse 3, Lab Evolut & Divers Biol, CNRS, UMR 5174, 118 Route Narbonne, F-31062 Toulouse, France TI - Sugary food robbing in ants: a case of temporalcleptobiosis AB - This study reports new information on interactions between Ectatomma tuberculatum (Ponerinae) and Crematogaster limata parabiotica (Myrmicinae). Workers of these sympatric arboreal ant species forage on the same pioneer trees. Diurnally, Ectatomma preyed on Crematogaster workers that avoided overt aggression by respecting a 'safe distance'. At night, Crematogaster initiated raids within the Ectatomma nests that they apparently left with their abdomen empty, then remained near the nest entrances where they successfully intercepted 75.2% of the returning Ectatomma foragers (N = 322). Certain intercepted workers rapidly resumed their return trip. Others (39.1%) were stopped, explored and licked during a long time by the Crematogaster. Most of them were carrying between their mandibles a droplet of liquid food that was stolen. This relationship, that appears to be a typical case of interspecific cleptobiosis, whose expression varies during the daytime, demonstrates for the first time sugary-food robbing, instead of prey robbing, (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved MH - France MH - Mexico|Chiapas PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Biology;Multidisciplinary Sciences U5 - J;Article AV - English IS - 1631-0691 UR - ISI:000222457400011 L2 - ants;cleptobiosis;interspecific relationships;French Guiana;Crematogaster limata parabiotica;Ectatomma tuberculatum;ECTATOMMA-RUIDUM; PONERINE ANT; NESTMATE RECOGNITION; HYMENOPTERA; FORMICIDAE; KLEPTOPARASITISM; TUBERCULATUM; EVOLUTION; GARDENS; PLANTATIONS SO - Comptes Rendus Biologies 2004 ;327(5):509-517 12197 UI - 5088 AU - Richaud-Patin Y AU - Vega-Boada F AU - Vidaller A AU - Llorente L AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Neurol, Mexico City 14000, DF, MexicoHosp Univ Bellvitge LHospitalet Llobregat, Dept Internal Med, Barcelona, SpainLlorente, L, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Multidrug resistance-1 (MDR-1) in autoimmune disorders IV. P-glycoprotein overfunction in lymphocytes from myasthenia gravis patients AB - Multidrug resistance (MDR) mechanisms have been widely studied in cancer. Among them, P-glycoprotein (P-gp) overfunction has been associated with resistance to several antineoplastic agents. The physiological role of P-gp involves hormone and metabolite secretion, bacterial product detoxification, and transport of several drugs to the extracellular space, thus inhibiting their toxic or therapeutic effects. The study of MDR-1 in diseases of autoimmune origin has just recently emerged. Corticosteroids remain the mainstay therapy for autoimmune diseases. As prednisone (PDN) is transported by P-gp, the aim of this study was to evaluate the P-gp function in lymphocytes from myasthenia gravis (MG) patients. Thirty MG patients and 25 healthy controls were studied. Peripheral blood mononuclear cells were isolated by gradient centrifugation and incubated with daunorubicin (DNR) (a fluorescent drug extruded by P-gp). Functional activity of P-gp was analyzed by flow cytometry. Results were expressed as percentage of gated lymphocytes able to efflux DNR. Overall, MG patients showed increased numbers of lymphocytes with functional P-gp activity when compared with controls ((x) over bar = 4.92 +/- 5.26% vs. (x) over bar = 0.7 +/- 0.48%, respectively) (P < 0.0001). When patients were classified as responders (n = 2 1) or refractory (n = 9) to treatment, the latter group exhibited higher values of functional P-gP ((x) over bar = 10.18 +/- 6.39%) when compared to the responder group ((x) over bar = 2.66 +/- 2.45%) (P = 0.0076). These data suggest, on the one hand, that drug resistance may be induced by long-term treatment or by high PDN doses and, on the other, emphasize the need for the study of P-gp antagonists in order to improve the current therapeutical schemes for the treatment of MG. (C) 2004 Elsevier SAS. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 4 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0753-3322 UR - ISI:000222418500008 L2 - Myasthenia gravis;P-glycoprotein;multidrug resistance-1;THROMBOCYTOPENIC PURPURA; CALCIUM; CELLS; TRANSPORTER; EXPRESSION; DIAGNOSIS; THERAPY SO - Biomedicine & Pharmacotherapy 2004 ;58(5):320-324 12198 UI - 3632 AU - Rico-Ramirez V AU - Diwekar UM AD - Univ Illinois, Dept Bio Chem & Ind Engn, Ctr Uncertain Syst Tools Optimizat & Management, Inst Environm Sci & Policy, Chicago, IL 60607, USAInst Tecnol Celaya, Mexico City 38010, DF, MexicoDiwekar, UM, Univ Illinois, Dept Bio Chem & Ind Engn, Ctr Uncertain Syst Tools Optimizat & Management, Inst Environm Sci & Policy, 851 S Morgan St,MC 063, Chicago, IL 60607 USA TI - Stochastic maximum principle for optimal control under uncertainty AB - Optimal control problems involve the difficult task of determining time-varying profiles through dynamic optimization. Such problems become even more complex in practical situations where handling time dependent uncertainties becomes an important issue. Approaches to stochastic optimal control problems have been reported in the finance literature and are based on real option theory, combining Ito's Lemma and the dynamic programming formulation. This paper describes a new approach to stochastic optimal control problems in which the stochastic dynamic programming formulation is converted into a stochastic maximum principle formulation. An application of such method has been reported by Rico-Ramirez et al. (Computers and Chemical Engineering, 2003, 27, 1867) but no details of the derivation were provided. The main significance of this approach is that the solution to the partial differential equations involved in the dynamic programming formulation is avoided. The classical isoperimetric problem illustrates this approach. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000225807300034 L2 - stochastic optimal control;stochastic maximum principle;Ito's Lemma;BATCH DISTILLATION SO - Computers & Chemical Engineering 2004 ;28(12):2845-2849 12199 UI - 5409 AU - Rico JJ AU - Flores JJ AU - Sotomane C AU - Calderon F AD - Univ Michoacana, Fac Ingn Elect, Div Estudios Postgrad, Morelia, Michoacan, Mexico. Univ Eduardo Mondlane, Ctr Informat, Maputo, Mozambique TI - Extracting temporal patterns from time series data bases for prediction of electrical demand AB - In this paper we present a technique for prediction of electrical demand based on multiple models. The multiple models are composed by several local models, each one describing a region of behavior of the system, called operation regime. The multiple models approach developed in this work is applied to predict electrical load 24 hours ahead. Data of electrical load from the state of California that include an approximate period of 2 years was used as a case of study. The concept of multiple model implemented in the present work is also characterized by the combination of several techniques. Two important techniques are applied in the construction of multiple models: Regularization and the Knowledge Discovery in Data Bases (KDD) techniques. KDD is used to identify the operation regime of electrical load time series MH - Mexico|Michoacan MH - Mozambique T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlejerico@zeus.umich.mx juanf@zeus.umich.mx sotomane@nambu.uem.mz calderon@zeus.umich.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600003 SO - 2004 ;():21-29 12200 UI - 4447 AU - Ridley B AU - Ott L AU - Pickering K AU - Emmons L AU - Montzka D AU - Weinheimer A AU - Knapp D AU - Grahek F AU - Li L AU - Heymsfield G AU - McGill M AU - Kucera P AU - Mahoney MJ AU - Baumgardner D AU - Schultz M AU - Brasseur G AD - Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoMax Planck Inst Meteorol, D-20146 Hamburg, GermanyNASA, Goddard Space Flight Ctr, Mesoscale Atmospher Proc Branch, Greenbelt, MD 20771, USAUniv N Dakota, Dept Atmospher Sci, Grand Forks, ND 58202, USAUniv Maryland, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21250, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USAUniv Maryland, Dept Meteorol, College Pk, MD 20742, USARidley, B, Natl Ctr Atmospher Res, Div Atmospher Chem, POB 3000, Boulder, CO 80307 USA TI - Florida thunderstorms: A faucet of reactive nitrogen to the upper troposphere AB - [1] During the July 2002 Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment (CRYSTAL-FACE), flights of a WB-57F aircraft revealed mixing ratios of nitric oxide 10 - 50 times background over distances of 25 - 175 km in the anvils of thunderstorms and in clear air downwind of storm systems due to lightning activity and possible transport from the boundary layer. Estimates of the total mass of NOx injected into the middle and upper troposphere differed considerably for a moderately versus highly electrically active storm system as expected. However, assuming that the total mass is dominated by lightning production, rough estimates of the production per average lightning flash for a moderately and a highly active storm also yielded quite different ranges of (0.33 - 0.66) x 10(26) and (1.7 - 2.3) x 10(26) molecules NO/flash, respectively. If the common assumption is made that intracloud flashes have 1/10th the NO production efficiency of cloud-to-ground (CG) flashes, the ranges of production for the moderately and highly active storms were (0.88 - 1.8) x 10(26) and (4.5 - 6.1) x 10(26) molecules NO/CG flash, respectively. The observed CG flash accumulations and NOx mass production estimate for the month of July 2002 over the Florida area are compared with results from the MOZART-2 global chemistry-transport model that uses a common lightning flash parameterization. Reasonable agreement was found after a correction to the lightning parameterization was made. Finally, broad-scale median mixing ratios of NO within anvils over Florida were significantly larger than found in storms previously investigated over Colorado and New Mexico MH - USA MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 14 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000223892200005 L2 - NOx;nitric oxide;lightning;convection;thunderstorms;GLOBAL LIGHTNING DISTRIBUTIONS; MESOSCALE CONVECTIVE COMPLEX; OPTICAL TRANSIENT DETECTOR; CHEMICAL-TRANSPORT MODEL; JULY 10; NUMERICAL SIMULATIONS; NORTHERN MIDLATITUDES; TROPOPAUSE REGION; STERAO-A; OZONE SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D17): 12201 UI - 6233 AU - Ridley B AU - Atlas E AU - Selkirk H AU - Pfister L AU - Montzka D AU - Walega J AU - Donnelly S AU - Stroud V AU - Richard E AU - Kelly K AU - Tuck A AU - Thompson T AU - Reeves J AU - Baumgardner D AU - Rawlins WT AU - Mahoney M AU - Herman R AU - Friedl R AU - Moore F AU - Ray E AU - Elkins J AD - Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307, USABay Area Environm Res Inst, Moffett Field, CA 94035, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USANOAA, Aeron Lab, Boulder, CO 80305, USAUniv Denver, Dept Engn, Denver, CO 80208, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoPhys Sci Inc, Andover, MA 01810, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USANOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80305, USAUniv Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309, USAAtlas, E, Natl Ctr Atmospher Res, Div Atmospher Chem, POB 3000, Boulder, CO 80307 USA TI - Convective transport of reactive constituents to the tropical and rigid-latitude tropopause region: I. Observations AB - Measurements of ozone, reactive carbon and nitrogen, and other trace constituents from flights of the NASA WB-57F aircraft in the upper troposphere and lower stratosphere reveal that convection in the tropics can present a complex mix of surface-emitted constituents right up to the altitude of the lapse rate tropopause. At higher latitudes over the southern US, the strongest transport signal, in terms of constituent mixing ratios, occurred in the potential temperature range of 340-350 K or approximately over the altitude range of 9-11 km. Weaker convective signals were also seen up to near the tropopause. There was no evidence of convective transport directly into the lower stratosphere from these flights. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000189102000003 L2 - convection;aircraft measurements;tropical tropopause;nitrogen oxides;hydrocarbons;methyl iodide;methyl nitrate;upper troposphere;lower stratosphere;chemical tracers;UPPER TROPOSPHERE; LOWER STRATOSPHERE; NITROGEN-OXIDES; BOUNDARY-LAYER; NUMERICAL SIMULATIONS; CLOUD TRANSPORT; CIRRUS CLOUDS; WATER-VAPOR; OZONE; CHEMISTRY SO - Atmospheric Environment 2004 ;38(9):1259-1274 12202 UI - 6768 AU - Riedel D AU - Hernandez-Pozos JL AU - Palmer RE AU - Kolasinski KW AD - Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, EnglandUniv London, Queen Mary, Dept Chem, London E1 4NS, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Lab Opt Cuaantica, Mexico City 09349, DF, MexicoRiedel, D, Univ Paris 11, Photophys Mol Lab, Bat 210, F-91405 Orsay, France TI - Fabrication of ordered arrays of silicon cones by optical diffraction in ultrafast laser etching with SF6 AB - We report the fabrication of ordered rows of conical spikes on a Si(111) substrate by etching with a femtosecond pulsed laser in the presence of SF6 gas. This is achieved by the creation of an optical near-field diffraction pattern when a copper wire (diameter similar to140 mum) is placed on the surface. Measurements of the height, base width and average separation of the silicon cones at two irradiation wavelengths (780 nm and 390 nm) confirm the important role of the optical parameters in the photochemical etching process. Moreover, the dependence of average cone separation on the laser repetition rate indicates that long-timescale processes such as post-pulse chemical interactions are important in cone formation MH - United Kingdom MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000187132500024 L2 - SURFACE-DEFECTS; IRRADIATION; FLUORINE; ABLATION; CHLORINE; SPIKES SO - Applied Physics A-Materials Science & Processing 2004 ;78(3):381-385 12203 UI - 3353 AU - Riestra AR AU - Heilman KM AD - Mexican Inst Neurosci, Dept Neurol, Mexico City, DF, MexicoUniv Florida, Dept Neurol, Gainesville, FL, USAMalcolm Randall Vet Adm Hosp, Gainesville, FL, USARiestra, AR, Hosp Angeles Lomas, Inst Mexicano Neurociencias, Vialidad Barranca S-N 750,Colonia Valle Palmas, Mexico City 52763, DF, Mexico TI - Visual facial grasp AB - Some patients with degenerative neurological diseases have a release of the vestibular-ocular reflex (VOR), as detected by passive head movement during visual fixation on a moving target ("doll's eyes" maneuver). However, a positive doll's eyes sign might be induced by other defects and the purpose of this article is to describe a new ocular sign of cortical dysfunction, the visual facial grasp. We observed three patients, one with progressive supranuclear palsy (PSP), another with probable Alzheimer's disease (AD) and a third with cortico-basal degeneration (CBD) all of whom appeared to demonstrate a release of the vestibulo-ocular reflex (VOR) with passive head movements. Whereas the patient with PSP, who was unable to inhibit the VOR regardless of the visual target used probably had a true release of the VOR, the patients with AD and CBD were able to inhibit this reflex when the visual target was the examiner's moving face. These two patients also exhibited spontaneous preference for visual fixation on the examiner's face and improvement in smooth pursuit when the examiner's face was the visual target. This clinical observation suggests that the deficits in these two patients with AD and CBD were related to the emergence of a primitive stimulus-bound behavior, the visual facial grasp MH - Mexico|Distrito Federal MH - USA PB - LISSE: SWETS ZEITLINGER PUBLISHERS RP - NOT IN FILE U3 - TC 2 U4 - Clinical Neurology;Psychiatry;Psychology U5 - J;Article AV - English IS - 1355-4794 UR - ISI:000226376900003 L2 - VESTIBULOOCULAR REFLEX; SMOOTH-PURSUIT; GAZE DIRECTION; FACES SO - Neurocase 2004 ;10(5):363-365 12204 UI - 5346 AU - Riggs N AU - Carrasco-Nunez G AD - No Arizona Univ, Dept Geol, Flagstaff, AZ 86011, USACtr Geociencias, Queretaro 76001, Qro, MexicoRiggs, N, No Arizona Univ, Dept Geol, Flagstaff, AZ 86011, USA TI - Evolution of a complex isolated dome system, Cerro Pizarro, central Mexico AB - Cerro Pizarro is an isolated rhyolitic dome in the intermontane Serdan-Oriental basin, located in the eastern Trans-Mexican Volcanic Belt. Cerro Pizarro erupted similar to1.1 km(3) of magma at about 220 ka. Activity of Cerro Pizarro started with vent-clearing explosions at some depth; the resultant deposits contain clasts of local basement rocks, including Cretaceous limestone, similar to0.46-Ma welded tuff, and basaltic lava. Subsequent explosive eruptions during earliest dome growth produced an alternating sequence of surge and fallout layers from an inferred small dome. As the dome grew both vertically and laterally, it developed an external glassy carapace due to rapid chilling. Instability of the dome during emplacement caused the partial gravitational collapse of its flanks producing various block-and-ash-flow deposits. After a brief period of repose, re-injection of magma caused formation of a cryptodome with pronounced deformation of the vitrophyric dome and the underlying units to orientations as steep as near vertical. This stage began apparently as a gas-poor eruption and no explosive phases accompanied the emplacement of the cryptodome. Soon after emplacement of the cryptodome, however, the western flank of the edifice catastrophically collapsed, causing a debris avalanche. A hiatus in eruptive activity was marked by erosion of the cone and emplacement of ignimbrite derived from a caldera to the north of Cerro Pizarro. The final growth of the dome growth produced its present shape; this growth was accompanied by multiple eruptions producing surge and fallout deposits that mantle the topography around Cerro Pizarro. The evolution of the Cerro Pizarro dome holds aspects in common with classic dome models and with larger stratovolcano systems. We suggest that models that predict a simple evolution for domes fail to account for possibilities in evolutionary paths. Specifically, the formation of a cryptodome in the early stages of dome formation may be far more common than generally recognized. Likewise, sector collapse of a dome, although apparently rare, is a potential hazard that must be recognized and for which planning must be done MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000221766200003 L2 - dome cryptodome;eastern Mexican;volcanic belt;dome collapse;dome models;SOUFRIERE HILLS VOLCANO; PYROCLASTIC FLOWS; MERAPI VOLCANO; UNZEN VOLCANO; CENTRAL JAVA; ERUPTION; LAVA; INDONESIA; DEPOSITS; MONTSERRAT SO - Bulletin of Volcanology 2004 ;66(4):322-335 12205 UI - 3987 AU - Riisager P AU - Gogichaishvili A AD - Lund Univ, Ctr GeoBiosphere Sci, S-22362 Lund, SwedenUNAM, Inst Geofis, Mexico City 04510, DF, MexicoRiisager, P, Lund Univ, Ctr GeoBiosphere Sci, Solvegatan 12, S-22362 Lund, Sweden TI - Paleo- and archeointensity: methods, techniques and new results - Preface MH - Mexico|Distrito Federal MH - Sweden PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Editorial Material AV - English IS - 0031-9201 UR - ISI:000224726300001 SO - Physics of the Earth and Planetary Interiors 2004 ;147(2-3):87-87 12206 UI - 4462 AU - Riley-Hulting ET AU - gado-Salinas A AU - Lavin M AD - Montana State Univ, Dept Plant Sci & Plant Pathol, Bozeman, MT 59717, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoRiley-Hulting, ET, Montana State Univ, Dept Plant Sci & Plant Pathol, Bozeman, MT 59717 USA TI - Phylogenetic systematics of Strophostyles (Fabaceae): A North American temperate genus within a neotropical diversification AB - A combined parsimony analysis of cpDNA trnK. nrDNA ITS/5.8S, and morphology reveals that the genus Strophostyles is monophyletic. In contrast to the conventional view of the geographic relationships of eastern North America, Strophostyles is most closely related to neotropical genera. Its sister is the South American genus Dolichopsis, which is endemic to the Chaco, a region characterized by having an annual frost interval. Strophostyles is apomorphically diagnosed by divergent stipules, persistent secondary floral bracts, calyces with four acute to sometimes attenuate lobes, and seed testa often with a cellular coat. The relationship with Dolichopsis is supported in part by a shared keel petal morphology involving a gibbous ventral margin proximal to the rostrum. Phylogenetic analysis of TTS/5.8S sequences and morphometric analysis of quantitative traits suggest that the three traditionally recognized species of Strophostyles can be recognized under the phylogenetic species concept. Strophostyles umbellata is the most genetically variable at the ITS locus and geographically centered in southern Appalachia. Strophostyles helvola shows the least amount of intraspecific genetic variation at this locus, suggesting a recent and rapid range expansion throughout eastern North America. Nucleotide sequence variation is intermediate in Strophostyles leiosperma, a species distributed primarily in central North America MH - Mexico|Distrito Federal MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 6 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000223702400011 L2 - DISTRIBUTIONS; LEGUMINOSAE; FORESTS; HELVOLA SO - Systematic Botany 2004 ;29(3):627-653 12207 UI - 6209 AU - Ringman JM AU - az-Olavarrieta C AU - Rodriguez Y AU - Chavez M AU - Paz F AU - Murrell J AU - Macias MA AU - Hill M AU - Kawas C AD - Univ Calif Los Angeles, Dept Neurol, Alzheimers Dis Ctr, Los Angeles, CA 90095, USAUniv Calif Irvine, Dept Neurol, Inst Brain Aging & Dementia, Irvine, CA 92717, USAInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoIndiana Univ, Dept Pathol & Lab Med, Indianapolis, IN 46204, USAUniv Guadalajara, CUCS, Dept Neurosci, Guadalajara 44430, Jalisco, MexicoRingman, JM, Univ Calif Los Angeles, Dept Neurol, Alzheimers Dis Ctr, 710 Westwood Plaza,Suite 2-238, Los Angeles, CA 90095 USA TI - Female preclinical presenilin-1 mutation carriers unaware of their genetic status have higher levels of depression than their non-mutation carrying kin AB - Objectives: To study depressive symptoms in preclinical presenilin-1 (PS1) related Alzheimer's disease. Methods: Participants were 33 Mexican women at risk for inheriting PS1 mutations who were not demented. They were interviewed, underwent cognitive testing, and completed the Beck depression inventory (BDI). PS1 mutation status was determined. Mean BDI scores were compared between PS1 mutation carriers and non-carriers. The percentage of subjects who reported seeing a psychiatric professional, and the percentage complaining of memory loss were compared between groups. Regression analysis was used to determine whether mutation status predicted BDI scores after adjusting for age, education, mini-mental state examination, and subjective memory function. Results: PS1 mutation carriers (n = 17) scored significantly higher than non-carriers (n = 16) on the BDI (mean score, 14.4 v 6.5, p = 0.017); 24% of mutation carriers and 12.5% of non-carriers admitted having sought help from a psychiatric professional (NS). Mutation status remained a significant predictor of BDI scores after adjusting for potential covariates. Though not demented, mutation carriers tended to score lower than non-carriers on several neuropsychological tests. Conclusions: Depressive symptoms can occur early in the course of PS1 related Alzheimer's disease, at least in women. This supports the hypothesis that depression may occur as a direct result of the neuropathology underlying Alzheimer's disease MH - USA MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 9 U4 - Clinical Neurology;Psychiatry;Surgery U5 - J;Article AV - English IS - 0022-3050 UR - ISI:000188970000034 L2 - ONSET ALZHEIMER-DISEASE; RISK-FACTORS; SYMPTOMS; AD SO - Journal of Neurology Neurosurgery and Psychiatry 2004 ;75(3):500-502 12208 UI - 3651 AU - Rios-Enriquez M AU - Shahin N AU - Duran-De-Bazua C AU - Lang J AU - Oliveros E AU - Bossmann SH AU - Braun AM AD - Univ Karlsruhe, Engler Bunte Inst, Lehrstuhl Umweltmesstech, D-76128 Karlsruhe, GermanyUniv Nacl Autonoma Mexico, Fac Quim, PIQAyQA, Mexico City 04510, DF, MexicoOliveros, E, Univ Karlsruhe, Engler Bunte Inst, Lehrstuhl Umweltmesstech, Kaiserstr 12, D-76128 Karlsruhe, Germany TI - Optimization of the heterogeneous Fenton-oxidation of the model pollutant 2,4-xylidine using the optimal experimental design methodology AB - Among advanced oxidation processes (AOP), the photochemically enhanced Fenton reaction (photo-Fenton) may be particularly effective for the treatment of industrial waste water, and the possibility to use solar light is an additional advantage of this process. In the present work, a Fe3+-exchanged zeolite Y was tested as a heterogeneous photo-Fenton catalyst for the degradation of the model organic pollutant, 2,4-xylidine. The performance of the catalyst was investigated using a bench photochemical reactor as well as solar reactors. The incident solar radiant powers (determined by ferrioxalate actinometry) showed linear correlations with the outputs of a Si-photodiode and a bolometer mounted on the solar unit, and could therefore be easily estimated from the on-line observation of the sensor outputs. The experimental design methodology was used for planning the experiments under normalized conditions and for modeling the rates of 2,4-xylidine oxidation as a function of the concentrations of the additives (Fe3+-exchanged zeolite catalyst and hydrogen peroxide). Although a direct quantitative comparison between both reactors is difficult (different geometries and volumes, different spectral distribution of the radiation sources), the performance of the solar reactor appears to compare favorably with that of the bench photochemical reactor. (C) 2004 Published by Elsevier Ltd MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 13 U4 - Energy & Fuels U5 - J;Article AV - English IS - 0038-092X UR - ISI:000225694200005 L2 - advanced oxidation processes;2,4-dimethyl aniline (2,4-xylidine);optimal experimental design;heterogeneous Fenton reaction (photochemically enhanced);solar photochemistry;WASTE-WATER-TREATMENT; HYDROXYL RADICALS SO - Solar Energy 2004 ;77(5):491-501 12209 UI - 4705 AU - Riquelme M AU - Bartnicki-Garcia S AD - Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521, USACICESE, Ensenada 22860, Baja California, MexicoBartnicki-Garcia, S, Univ Calif Riverside, Dept Plant Pathol, Riverside, CA 92521 USA TI - Key differences between lateral and apical branching in hyphae of Neurosora crassa AB - We examined in fine detail growth kinetics and intracellular events during lateral and apical branching in hyphae of Neurospora crassa. By high-resolution video-enhanced light microscopy, we found remarkable differences in the events preceding lateral vs apical branching. While apical branching involved a significant disturbance in the apical growth of the parental hypha, lateral branching occurred without any detectable alterations in the growth of the parental hypha. Prior to the emergence of a lateral branch, an incipient Spitzenkorper was formed about 12-29 mum behind the apex. Lateral branch formation did not interfere with the elongation rate of the primary hypha, the shape of its apex or the behavior of its Spitzenkorper. In sharp contrast, apical branching was preceded by marked changes in physiology and morphology of the parental hypha and by a sharp drop in elongation rate. The sequence involved a cytoplasmic contraction, followed by a retraction, dislocation, and disappearance of the Spitzenkorper; hyphal elongation decreased sharply and a transient phase of isotropic growth caused the hyphal apex to round up. Growth resumed with the formation of two or more apical branches, each one with a Spitzenkorper formed by gradual condensation of phase-dark material (vesicles) around an invisible nucleation site. The observed dissimilarities between lateral and apical branching suggest that these morphogenetic pathways are triggered differently. Whereas apical branching may be traced to a sudden discrete disruption in cytoplasmic organization (cytoplasmic contraction), the trigger of lateral branching probably stems from the subapical accumulation of wall precursors (presumably vesicles) reaching a critical concentration. (C) 2004 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Baja California PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Genetics & Heredity;Mycology U5 - J;Article AV - English IS - 1087-1845 UR - ISI:000223263100002 L2 - descriptors;apical branching;lateral branching;hyphae;Neurospora crassa;Spitzenkorper;video microscopy;FUNGUS NEUROSPORA-CRASSA; ASPERGILLUS-NIDULANS; TIP GROWTH; SPITZENKORPER; MORPHOGENESIS; CALCIUM; MODEL; ORGANIZATION; DETERMINES; MITOSIS SO - Fungal Genetics and Biology 2004 ;41(9):842-851 12210 UI - 3820 AU - Rivas-Vazquez LP AU - Rendon-Angeles JC AU - Rodriguez-Galicia JL AU - Zhu K AU - Yanagisawa K AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoKochi Univ, Res Lab Hydrothermal Chem, Kochi 7808520, JapanRendon-Angeles, JC, Ctr Invest Carr Saltillo, Mty Km 13-5,Col Molinos Rey Ramos Arizpe, Coahuila 25900, Mexico TI - Hydrothermal synthesis and sintering of lanthanum chromite powders doped with calcium AB - Precursor La-Ca gels of LaCrO3, La0.9Ca0.1CrO3 and La0.8Ca0.2CrO3 were prepared by coprecipitation and then crystallized under hydrothermal conditions. Under these conditions, mono dispersed nanosized ( < 300 nm) powders of LaCrO3 and its solid solutions doped with calcium were obtained at temperatures between 350 and 425degreesC. The powders were sintered in air at a temperature range of 1200-1500degreesC for intervals between I and 5 h. A maximum apparent density of 97.66% was preferentially achieved by pellets with the larger amount of Ca, La0.8Ca0.2CrO3, sintered at 1400degreesC for 5 h in air atmosphere. The average grain size measured on sintered specimens was of 6 mum. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0167-2738 UR - ISI:000225139100078 L2 - hydrothermal treatment;interconector;lanthanum chromite;sintering;solid solution;LACRO3 SO - Solid State Ionics 2004 ;172(1-4):389-392 12211 UI - 3622 AU - Rivera-Armenta JL AU - Heinze T AU - Mendoza-Martinez AM AD - Inst Tecnol Cd Madero, Div Estudios Posgrado & Invest, Tams 89440, MexicoBerg Univ Gesamthsch Wuppertal, Fachbereich 9, D-42097 Wuppertal, GermanyMendoza-Martinez, AM, Inst Tecnol Cd Madero, Div Estudios Posgrado & Invest, Juventino Rosas & Jesus Urueta S-N 8440 Ciudad M, Tams 89440, Mexico TI - New polyurethane foams modified with cellulose derivatives AB - New polyurethane foams were elaborated with different cellulose derivatives as raw material, by the one-shot process. The foams were submitted to soxhlet extraction in order to quantify the amount of cellulose derivative incorporated in the foam by chemical bonding. The foams were characterized by means of FTIR, solid state C-13 NMR spectroscopy. thermogravimetric analysis, differential scanning calorimetry. scanning electron microscopy and dynamic mechanical analysis (DMA). The FTIR- and solid state C-13 NMR showed characteristic peaks for ceflulose derivatives and polyurethane. DMA measurements indicated that storage modulus increased with increasing content of ceflulose derivatives. The highest value was obtained for foams prepared with cellulose sulphate. (C) 2004 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Tamaulipas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000225819500019 L2 - polyurethane;cellulose derivatives;degree of substitution;mechanical properties;STARCH; OIL SO - European Polymer Journal 2004 ;40(12):2803-2812 12212 UI - 4491 AU - Rivera-Monroy VH AU - Twilley RR AU - Bone D AU - Childers DL AU - Coronado-Molina C AU - Feller IC AU - Herrera-Silveira J AU - Jaffe R AU - Mancera E AU - Rejmankova E AU - Salisbury JE AU - Weil E AD - Univ SW Louisiana, Ctr Ecol & Environm Technol, Lafayette, LA 70504, USAUniv SW Louisiana, Dept Biol, Lafayette, LA 70504, USAUniv Simon Bolivar, Inst Tecnol & Ciencias Marina, Caracas 1080A, VenezuelaFlorida Int Univ, Dept Biol Sci, Miami, FL 33199, USAFlorida Int Univ, SE Environm Res Ctr, Miami, FL 33199, USAS Florida Water Management Dist, W Palm Beach, FL 33416, USASmithsonian Environm Res Ctr, Edgewater, MD 21037, USAIPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoFlorida Int Univ, Dept Chem, Miami, FL 33199, USAUniv Magdalena, Inst Invest Trop, Santa Marta, ColombiaUniv Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616, USAUniv New Hampshire, Ocean Proc Anal Lab, Durham, NH 03824, USAUniv Puerto Rico, Dept Marine Sci, Lajas, PR 00667, USARivera-Monroy, VH, Univ SW Louisiana, Ctr Ecol & Environm Technol, Lafayette, LA 70504 USA TI - A conceptual framework to develop long-term ecological research and management objectives in the wider Caribbean region AB - The Caribbean Sea and its watersheds show signs of environmental degradation. These fragile coastal ecosystems are susceptible to environmental impacts, in part because of their oligotrophic conditions and their critical support of economic development. Tourism is one of the major sources of income in the Caribbean, making the region one of the most ecotourism dependent in the world. Yet there are few explicit, long-term, comprehensive studies describing the structure and function of Caribbean ecosystems. We propose a conceptual framework using the environmental signature hypothesis of tropical coastal settings to develop a series of research questions for the reef-sea-grass-wetland seascape. We applied this approach across 13 sites throughout the region, including ecosystems in a variety of coastal settings with different vulnerabilities to environmental impacts. This approach follows the strategy developed by the Long Term Ecological Research program of the National Science Foundation to establish ecological research questions best studied over decades and large spatial areas MH - Colombia MH - USA MH - Mexico|Yucatan MH - Venezuela PB - WASHINGTON: AMER INST BIOLOGICAL SCI RP - NOT IN FILE U3 - TC 12 U4 - Biology U5 - J;Article AV - English IS - 0006-3568 UR - ISI:000223743000009 L2 - Caribbean;eutrophication;LTER (long-term ecological research);coastal settings;human influence;VS. PHOSPHORUS LIMITATION; CORAL-REEF DECLINE; MANGROVE FOREST; NUTRIENT ENRICHMENT; MACROALGAL BLOOMS; MASS MORTALITY; CLIMATE-CHANGE; RIVER ESTUARY; PHASE-SHIFTS; FLORIDA SO - Bioscience 2004 ;54(9):843-856 12213 UI - 5947 AU - Rivera-Munoz E AU - Alonso G AU - Siadati MH AU - Chianelli RR AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAUniv Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, MexicoCtr Invest Mat Avanzados, Chihuahua 31109, MexicoRivera-Munoz, E, Univ Texas, Dept Chem, El Paso, TX 79968, USA TI - Silica gel-supported, metal-promoted MoS2 catalysts for HDS reactions AB - Silica-supported, metal-promoted MoS2 catalysts were prepared. Sol - gel method was used for providing the SiO2 support as well as for including the catalyst precursors and promoter in one single step of preparation. The general idea in this approach is to obtain the promoted MoS2 catalyst phase finely and uniformly distributed in the SiO2 support. Scanning electron microscopy of the obtained catalysts shows a fine and homogeneous distribution of the metal-promoted MoS2 particles on the SiO2 matrix with surface area between 62 and 104 m(2)/g. Metal promoter affects the surface area, pore size distribution and the hydrodesulfurization (HDS) activity and selectivity. When different promoters were used at the same amount, the highest selectivity for direct CAS bound cleavage is observed for Ru/MoS2/SiO2 catalyst, and at different amounts of Co the highest selectivity was occurred with Co/MoS2/SiO2 at 12% of Co/MoS2, X-ray diffraction studies showed that the catalysts are poorly crystallized with a very weak intensity of the (002) line of 2H-MoS2. Comparison on the catalytic activities of the catalysts with different metal promoters was made. Catalytic activity results showed the method of preparation used in this study is successful in producing very efficient catalysts for the HDS of dibenzothiophene (DBT). Silica-supported, cobalt-promoted MoS2 catalyst showed the highest activity MH - Mexico|Chihuahua MH - Mexico|Queretaro MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000220339500010 L2 - MoS2 catalyst;metal-promoted;hydrodesulfurization;sol-gel method;HYDRODESULFURIZATION; KINETICS; HYDROGENATION SO - Catalysis Letters 2004 ;94(3-4):199-204 12214 UI - 4210 AU - Rivera A AU - Nunez ME AU - Morales-Rios MS AU - Joseph-Nathan P AD - Univ Nacl Colombia, Dept Quim, Bogota 14490 AA, DC, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRivera, A, Univ Nacl Colombia, Dept Quim, Bogota 14490 AA, DC, Colombia TI - Preparation of cage amine 1,3,6,8-tetraazatricyclo[4.3.1.1(3,8)]undecane AB - Reaction between cage amine 1,3,6,8-tetraazatricyclo[4.4. 1.1(3,8)]dodecane (TATD) and ammonium fluoride affords 1,3,6,8-tetraazatricyclo[4.3.1.1(3,8)]undecane, the missing link between 1,3,5,7-tetraazatricyclo[3.3.1.1(3,7)]decane (urotropine) and TATD. The structure was established mainly from 2D NMR measurements. (C) 2004 Elsevier Ltd. All rights reserved MH - Colombia MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0040-4039 UR - ISI:000224238500004 L2 - adamanzanes;aminals;cage amines;HEXAMETHYLENETETRAMINE SO - Tetrahedron Letters 2004 ;45(41):7563-7565 12215 UI - 5569 AU - Rivera A AU - Maldonado M AU - Nunez ME AU - Joseph-Nathan P AD - Univ Nacl Colombia, Dept Quim, Bogota, ColombiaInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRivera, A, Univ Nacl Colombia, Dept Quim, Apartado Aereo 14490,Ciudad Univ, Bogota, Colombia TI - Nucleophilic substitution at the aminalic carbon of some macrocyclic polyaminals AB - Macrocyclic polyaminals 1,3,6,8-tetraazatricyclo[4.4.1.1(38)]dodecane 1, 1:3,7:9,13:15,19:21-tetramethyleneperhydro pyrimidine 2, and 6H,13H-5:12,7:14-dimethanedibenzo[d,i] [1,3,6,8]tetrazecine 3 react at room temperature with benzotriazole to give symmetrical imidazolidine, perhydropyrimidine and 2,3-dihydrobenzimidazole, respectively. Such aminals also react with cyanide to produce symmetric 1,3-bis(cyanomethyl)imidazolidine 4b, 1,3-bis(cyanomethyl)perhydropyrimidine 5b and 1,3-bis (cyanomethyl)-2,3-dihydrobenzimidazole 6b MH - Colombia MH - Mexico|Distrito Federal PB - LONDON: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0793-0283 UR - ISI:000221171500014 L2 - AMINES SO - Heterocyclic Communications 2004 ;10(1):77-80 12216 UI - 6002 AU - Rivera AC AU - Andres JA AU - Cordoba-Aguilar A AU - Utzeri C AD - Univ Vigo, Grp Ecol Evolut, Dept Ecol & Biol Anim, EUET Forestal, Pontevedra 36005, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Biol, Pachuca 42001, Hidalgo, MexicoUniv Roma La Sapienza, Dipartimento Biol Anim & Uomo, I-00185 Rome, ItalyRivera, AC, Univ Vigo, Grp Ecol Evolut, Dept Ecol & Biol Anim, EUET Forestal, Campus Univ, Pontevedra 36005, Spain TI - Postmating sexual selection: Allopatric evolution of sperm competition mechanisms and genital morphology in calopterygid damselflies (Insecta : Odonata) AB - Postmating sexual selection theory predicts that in allopatry reproductive traits diverge rapidly and that the resulting differentiation in these traits may lead to restrictions to gene flow between populations and, eventually, reproductive isolation. In this paper we explore the potential for this premise in a group of damselflies of the family Calopterygidae, in which postmating sexual mechanisms are especially well understood. Particularly, we tested if in allopatric populations the sperm competition mechanisms and genitalic traits involved in these mechanisms have indeed diverged as sexual selection theory predicts. We did so in two different steps. First, we compared the sperm competition mechanisms of two allopatric populations of Calopteryx haemorrhoidalis (one Italian population studied here and one Spanish population previously studied). Our results indicate that in both populations males are able to displace spermathecal sperm, but the mechanism used for sperm removal between both populations is strikingly different. In the Spanish population males seem to empty the spermathecae by stimulating females, whereas in the Italian population males physically remove sperm from the spermathecae. Both populations also exhibit differences in genital morphometry that explain the use of different mechanisms: the male lateral processes are narrower than the spermathecal ducts in the Italian population, which is the reverse in the Spanish population. The estimated degree of phenotypic differentiation between these populations based on the genitalic traits involved in sperm removal was much greater than the differentiation based on a set of other seven morphological variables, suggesting that strong directional postmating sexual selection is indeed the main evolutionary force behind the reproductive differentiation between the studied populations. In a second step, we examined if a similar pattern in genital morphometry emerge in allopatric populations of this and other three species of the same family (Calopteryx splendens, C. virgo and Hetaerina cruentata). Our results suggest that there is geographic variation in the sperm competition mechanisms in all four studied species. Furthermore, genitalic morphology was significantly divergent between populations within species even when different populations were using the same copulatory mechanism. These results can be explained by probable local coadaptation processes that have given rise to an ability or inability to reach and displace spermathecal sperm in different populations. This set of results provides the first direct evidence of intraspecific evolution of genitalic traits shaped by postmating sexual selection MH - Italy MH - Mexico|Hidalgo MH - Spain PB - LAWRENCE: SOC STUDY EVOLUTION RP - NOT IN FILE U3 - TC 10 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0014-3820 UR - ISI:000220194200012 L2 - Calopteryx haemorrhoidalis;cryptic female choice;damselfly;genital evolution;phenotypic differentiation;sexual selection;CRYPTIC FEMALE CHOICE; SPLENDENS XANTHOSTOMA CHARPENTIER; SCATHOPHAGA-STERCORARIA L.; YELLOW DUNG FLY; RIVAL SPERM; ANTAGONISTIC COEVOLUTION; FERTILIZATION SUCCESS; COPULATION DURATION; SPECIES ODONATA; STORED SPERM SO - Evolution 2004 ;58(2):349-359 12217 UI - 3631 AU - Rivera C AU - Heniche M AU - Ascanio G AU - Tanguy P AD - Ecole Polytech, Dept Chem Engn, URPEI, Montreal, PQ H3C 3A7, CanadaNatl Autonomous Univ Mexico, CCADET, Mexico City 04510, DF, MexicoTanguy, P, Ecole Polytech, Dept Chem Engn, URPEI, POB 6079,Stn CV, Montreal, PQ H3C 3A7, Canada TI - A virtual finite element model for centered and eccentric mixer configurations AB - An implementation of the virtual finite element method with unstructured grids for the modeling of laminar flow in eccentric mixers is presented. The effect of the meshing strategy on the quality of the computed flow field is first carefully investigated with a centered impeller. It is shown that both the number of elements in the vicinity of the impeller and the number of kinematics constraints imposed in the virtual finite element formulation control the computational accuracy. The method is then applied to the case of an eccentric mixer provided with a Rushton turbine showing the capabilities of the proposed approach. (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Computer Science, Interdisciplinary Applications;Engineering, Chemical U5 - J;Article AV - English IS - 0098-1354 UR - ISI:000225807300003 L2 - virtual finite element method;fictitious domain;constrained optimization;meshing strategy;laminar mixing;eccentric impeller;FICTITIOUS DOMAIN METHOD; FLUID-FLOW; STIRRED-TANK; LAMINAR-FLOW; IMPELLER SO - Computers & Chemical Engineering 2004 ;28(12):2459-2468 12218 UI - 3276 AU - Rivera I AU - Patino F AU - Cruells M AU - Roca A AU - Vinals J AD - Univ Autonoma Hidalgo, Ctr Invest Mat & Met, Hidalgo, MexicoUniv Barcelona, Fac Quim, E-08028 Barcelona, SpainRivera, I, Univ Autonoma Hidalgo, Ctr Invest Mat & Met, Crta Pachuca Tulancingo Km 4-5, Hidalgo, Mexico TI - Silver precipitation from electrolytic effluents AB - The recovery of silver contained in electrolytic effluents is attractive due to its high economic value. These effluents are considered toxic wastes and it is not possible to dump them directly without any detoxification process. One of the most important way for silver recovery is the precipitation with sodium ditionite, sodium boroludride or hydrazine monohidrate. In this work, the most significant aspects related to the use of these reagents is presented. Results of silver precipitation with sodium ditionite from effluents containing thiosulfate without previous elimination of other species are also presented. Silver concentration in the final effluents was < 1 ppm MH - Mexico|Hidalgo MH - Spain PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 1 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - Spanish IS - 0034-8570 UR - ISI:000226679700010 L2 - silver;electrolytic effluent;sodium ditionite;minimization;recycling;ION-EXCHANGE RESINS; SOLVENT-EXTRACTION; LIQUID EFFLUENTS; TOXIC METALS; RECOVERY; REMOVAL SO - Revista de Metalurgia 2004 ;40(5):369-373 12219 UI - 5516 AU - Rivera JA AU - Sotres-Alvarez D AU - Habicht JP AU - Shamah T AU - Villalpando S AD - Ctr Invest Nutr & Salud, Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoCornell Univ, Div Nutr Sci, New York, NY, USARivera, JA, Ctr Invest Nutr & Salud, Inst Nacl Salud Publ, Av Univ 655,Colonia Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Impact of the Mexican Program for Education, Health, and Nutrition (Progresa) on rates of growth and anemia in infants and young children - A randomized effectiveness study AB - Context Malnutrition causes death and impaired health in millions of children. Existing interventions are effective under controlled conditions; however, little information is available on their effectiveness in large-scale programs. Objective To document the short-term nutritional impact of a large-scale, incentive-based development program in Mexico (Progress), which included a nutritional component. Design, Setting, and Participants A randomized effectiveness study of 347 communities randomly assigned to immediate incorporation to the program in 1998 (intervention group; n=205) or to incorporation in 1999 (crossover intervention group; n=142). A random sample of children in those communities was surveyed at baseline and at 1 and 2 years afterward. Participants were from low-income households in poor rural communities in 6 central Mexican states. Children (N=650) 12 months of age or younger (n=373 intervention group; n=277 crossover intervention group) were included in the analyses. Intervention Children and pregnant and lactating women in participating households received fortified nutrition supplements; and the families received nutrition education, health care, and cash transfers. Main Outcome Measures Two-year height increments and, anemia rates as measured by blood hemoglobin levels in participating children. Results Progresa was associated with better growth in height among the poorest and younger infants. Age- and length-adjusted height was greater by 1.1 cm (26.4 cm in the intervention group Vs 25.3 cm in the crossover intervention group) among infants younger than 6 months at baseline and who lived in the poorest households. After 1 year, mean hemoglobin values were higher in the intervention group (11.12 g/dL; 95% confidence interval [CI], 10.9-11.3 g/dL) than in the crossover intervention group (10.75 g/dL; 95% CI, 10.5-11.0 g/dL) who had not yet received the benefits of the intervention (P=.01). There were no differences in hemoglobin levels between the 2 groups at year 2 after both groups were receiving the intervention. The age-adjusted rate of anemia (hemoglobin level <11 g/dL) in 1999 was higher in the crossover intervention group than in the intervention group (54.9% vs 44.3%; P=.03), whereas in 2000 the difference was not significant (23.0% vs 25.8%, respectively; P=.40). Conclusion Progresa, a large-scale, incentive-based development program with a nutritional intervention, is associated with better growth and lower rates of anemia in low-income, rural infants and children in Mexico MH - Mexico|Morelos MH - USA PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 30 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0098-7484 UR - ISI:000221738800019 L2 - SUPPLEMENTATION SO - Jama-Journal of the American Medical Association 2004 ;291(21):2563-2570 12220 UI - 5170 AU - Rivera JHV AU - Alvarado F AU - Valdivia T AU - Raj J AD - Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, San Patricio 48980, Jalisco, MexicoConservat & Res Ctr, Front Royal, VA 24060, USARivera, JHV, Univ Nacl Autonoma Mexico, Inst Biol, Estac Biol Chamela, AP 21, San Patricio 48980, Jalisco, Mexico TI - First report of cowbird parasitism on the black-capped gnatcatcher in western Mexico AB - In formation on cowbird parasitism in Mexico is rare. We report the successful fledging of a brown-headed cowbird (Molothrus ater) nestling by black-capped gnatcatchers (Polioptila nigriceps) in the tropical deciduous forest of the Chamela-Cuixmala Biosphere Reserve, western Mexico, in June 2001. We observed 2 additional gnatcatcher pairs feeding a single brown-headed cowbird fledging. Opportunistic observations of nests of other species and few captures of brown-headed cowbirds during 18 months of intensive mist-netting Suggested that cowbird abundance and parasitism was low in the reserve MH - Mexico|Jalisco MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000222148800017 L2 - BROWN-HEADED COWBIRD SO - Southwestern Naturalist 2004 ;49(2):277-278 12221 UI - 3725 AU - Riveron EMF AU - Cespedes MDT AD - Inst Politecn Nacl, Ctr Res Comp, Mexico City 07738, DF, MexicoUniv Havana, Havana, CubaRiveron, EMF, Inst Politecn Nacl, Ctr Res Comp, Juan Dios Batiz S-N, Mexico City 07738, DF, Mexico TI - Measurement of parameters of the optic disk in ophthalmoscopic color images of human retina AB - The objective of this paper is to measure some important parameters of the optic disk (or optic papilla) in ophthalmoscopic color images of human retinas. The approach consists of locating the optic disk automatically, segmenting its contour and the contour of the depression-like feature caused by glaucoma, called an excavation or cup. Then the corresponding areas are measured to calculate the ratio Cup/Disc and the relative displacement of the centroids of both regions. To achieve these objectives, noise is filtered, luminance is normalized, and a thresholding technique is used. The results obtained will aid the work of ophthalmologists by increasing the quality of automatic diagnosis of glaucoma, one of the main causes of blindness worldwide MH - Cuba MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000225085900083 SO - Progress in Pattern Recognition, Image Analysis and Applications 2004 ;3287():661-668 12222 UI - 6092 AU - rmstrong-Altrin JS AU - Lee YI AU - Verma SP AU - Ramasamy S AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoSeoul Natl Univ, Sch Earth & Environm Sci, Seoul 151747, South KoreaUniv Madras, Dept Geol, Madras 600025, Tamil Nadu, IndiaArmstrong-Altrin, JS, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Priv Xochicalco S-No,Col Ctr,Apartado Postal 34, Temixco 62580, Morelos, Mexico TI - Geochemistry of sandstones from the upper Miocene Kudankulam Formation, southern India: Implications for provenance, weathering, and tectonic setting AB - Petrographic, major, trace, and rare earth element compositions of sandstones from the upper Miocene Kudankulam Formation, Southern India, have been investigated to determine their provenance, tectonic setting, and weathering conditions. All sandstone samples are highly enriched in quartz (Q) but poor in feldspar (F) and lithic fragments (L). The major-element concentrations of these sandstones reveal the relative homogeneity of their source. Geochemically, the Kudankulam sandstones are classified as arkose, subarkose, litharenite, and sublitharenite. The CIA values (chemical index of alteration; mean value similar to 44.5) for these sandstones and the A-CN-K diagram suggest their low-weathering nature. Similarly, their Fe2O3* + MgO (mean similar to 2.7), Al2O3/SiO2 (similar to 0.09), K2O/Na2O (similar to 2.2) ratios and TiO2 contents (similar to 0.3) are consistent with a passive-margin setting. The Eu/Eu* (similar to 0.5), (La/Lu)(cn) (similar to 21), La/Sc (similar to 5.9), Th/Sc (similar to 1.9), La/Co (similar to 5.7), Th/Co (similar to 1.8), and Cr/Th (similar to 5.3) ratios support a felsic source for these sandstones. Chondrite-normalized REE patterns with LREE enrichment, flat HREE, and negative Eu anomaly also are attributed to felsic source-rock characteristics for Kudankulam sandstones. Total REE concentrations of these sandstones reflect the variations in their grain-size fractions. The source rocks are probably identified to be Proterozoic gneisses, charnockites, and granites of the Kerala Khondalite Belt, which must have been exposed at least since the late Miocene. Finally, the unusual Ni enrichment in the Kudankulam sandstones, unaccompanied by a similar enrichment in Cr, Co, and V, may be related to either the presence of pyrite in the sandstones or, more likely, the fractionation of garnet from the source rocks during transportation MH - India MH - Mexico|Morelos MH - South Korea PB - TULSA: SEPM-SOC SEDIMENTARY GEOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Geology U5 - J;Article AV - English IS - 1527-1404 UR - ISI:000189328000010 L2 - RARE-EARTH ELEMENTS; PENNSYLVANIAN-PERMIAN AGE; KERALA KHONDALITE BELT; SEDIMENTARY-ROCKS; CHEMICAL-COMPOSITION; CONTINENTAL BLOCKS; CLASTIC SEDIMENTS; CRUSTAL EVOLUTION; GREENSTONE-BELT; PLATE-TECTONICS SO - Journal of Sedimentary Research 2004 ;74(2):285-297 12223 UI - 4191 AU - rnaiz-Villena A AU - Vargas-Alarcon G AU - Granados J AU - Gomez-Casado E AU - Longas J AU - Gonzalez-Hevilla M AU - Zuniga J AU - Salgado N AU - Moscoso M AU - Zamora J AU - Hernandez-Pacheco G AU - Guillen J AU - Martinez-Laso J AD - Univ Complutense, Fac Med, Hosp 12 Octubre, Dept Immunol, E-28040 Madrid, SpainUniv Panamer, Dept Mol Biol, Mexico City, DF, MexicoArnaiz-Villena, A, Univ Complutense, Fac Med, Hosp 12 Octubre, Dept Immunol, E-28040 Madrid, Spain TI - HLA-DQA1,-DQB1 and-DRB1 alleles in mazatecan population from Mexico MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000224407100077 SO - Human Immunology 2004 ;65(9-10):1006-1007 12224 UI - 4595 AU - Roach HI AU - Aigner T AU - Kouri JB AD - Bone & Joint Res Unit, Southampton, Hants, EnglandDept Pathol, Nurnberg, GermanyDept Patol Expt, Mexico City, DF, Mexico TI - Chondroptosis: A variant of apoptotic cell death in chondrocytes? MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000221573400077 SO - Journal of Bone and Mineral Research 2004 ;19(6):1041-1041 12225 UI - 5646 AU - Roach HI AU - Aigner T AU - Kouri JB AD - Gen Hosp, Univ Orthopaed Bone & Joint Res Unit, Southampton SO16 6YD, Hants, EnglandUniv Erlangen Nurnberg, Dept Pathol, Erlangen, GermanyIPN, CINVESTAV, Dept Expt Pathol, Mexico City 07738, DF, MexicoRoach, HI, Gen Hosp, Univ Orthopaed Bone & Joint Res Unit, CF86,MP 817, Southampton SO16 6YD, Hants, England TI - Chondroptosis: A variant of apoptotic cell death in chondrocytes? AB - Evidence has accumulated in recent years that programmed cell death (PCD) is not necessarily synonymous with the classical apoptosis, as defined by Kerr and Wyllie, but that cells use a variety of pathways to undergo cell death, which are reflected by different morphologies. Although chondrocytes with the hallmark features of classical apoptosis have been demonstrated in culture, such cells are extremely rare in vivo. The present review focuses on the morphological differences between dying chondrocytes and classical apoptotic cells. We propose the term 'chondroptosis' to reflect the fact that such cells are undergoing apoptosis in a non-classical manner that appears to be typical of programmed chondrocyte death in vivo. Unlike classical apoptosis, chondroptosis involves an initial increase in the endoplasmic reticulum and Golgi apparatus, reflecting an increase in protein synthesis. The increased ER membranes also segment the cytoplasm and provide compartments within which cytoplasm and organelles are digested. In addition, destruction occurs within autophagic vacuoles and cell remnants are blebbed into the lacunae. Together these processes lead to complete self-destruction of the chondrocyte as evidenced by the presence of empty lacunae. It is speculated that the endoplasmic reticulum pathway of apoptosis plays a greater role in chondroptosis than receptor-mediated or mitochondrial pathways and that lysosomal proteases are at least as important as caspases. Because chondroptosis does not depend on phagocytosis, it may be more advantageous in vivo, where chondrocytes are isolated within their lacunae. At present the initiation factors or the molecular pathways involved in chondroptosis remain unclear MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 34 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1360-8185 UR - ISI:000221102700002 L2 - apoptosis;chondrocyte;morphology;growth plate;osteoarthritis;ultrastructure;TERMINALLY DIFFERENTIATED CHONDROCYTES; HUMAN OSTEOARTHRITIC CARTILAGE; HUMAN ARTICULAR-CARTILAGE; AVIAN GROWTH-PLATE; HYPERTROPHIC CHONDROCYTES; NITRIC-OXIDE; ENDOCHONDRAL OSSIFICATION; EPIPHYSEAL CHONDROCYTES; NECROSIS; LIGAND SO - Apoptosis 2004 ;9(3):265-277 12226 UI - 5775 AU - Robbie D AU - Tkachenko M AD - Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, AustraliaUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoRobbie, D, Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia TI - Hereditarily s-groups AB - We call a topological group G an s-group if G has a suitable set (the concept introduced by Hofmann and Morris), and an hs-group if every subgroup of G is an s-group. Similarly, cs-groups and gs-groups are topological groups having a closed suitable set and a generating suitable set, respectively. This gives rise (by the obvious mnemonic rule) to hcs- and hgs-groups, as well as hgcs-groups. We show that closed continuous homomorphisms preserve the classes of hs-, hcs-, hgs-, and hgcs-groups. This result is applied to prove that every compact hs- group is metrizable while every almost metrizable hs- group is metrizable MH - Australia MH - Mexico|Distrito Federal PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1433-5883 UR - ISI:000220810600007 L2 - THIN GENERATING SETS; TOPOLOGICAL-GROUPS; SUITABLE SETS; SUMS SO - Journal of Group Theory 2004 ;7(2):255-264 12227 UI - 3943 AU - Roberts TL AU - Obrador GT AU - St Peter WL AU - Pereira BJG AU - Collins AJ AD - Minneapolis Med Res Fdn Inc, Nephrol Anal Serv, Minneapolis, MN 55404, USATufts Univ, New England Med Ctr, Div Nephrol, Boston, MA 02111, USAUniv Panamer Sch Med, Mexico City, DF, MexicoUniv Minnesota, Minneapolis, MN, USACollins, AJ, Minneapolis Med Res Fdn Inc, Nephrol Anal Serv, 914 S 8th St,Suite D-206, Minneapolis, MN 55404 USA TI - Relationship among catheter insertions, vascular access infections, and anemia management in hemodialysis patients AB - Background. Arteriovenous fistulas are the recommended permanent vascular access (VA) for chronic hemodialysis. However, in the United States most patients begin chronic hemodialysis with a catheter. Recent data suggest that VA type contributes to recombinant human erythropoietin (rHuEPO) resistance. We examined catheter insertions, VA infections, and anemia management in Medicare, rHuEPO- treated, chronic hemodialysis patients. Methods. We compared hemoglobin values and rHuEPO and intravenous iron dosing with concurrent catheter insertions and VA infections in 186,348 period- prevalent patients in 2000. We studied anemia management after catheter insertions and VA infections in 67,410 incident patients from 1997 to 1999. Multiple linear regression models examined follow- up hemoglobin and rHuEPO dose per week (rHuEPO/ wk) by numbers of catheter insertions and hospitalizations for VA infection. Results. In the prevalent cohort, increasing temporary and permanent catheter insertions and VA infections were associated with slightly lower hemoglobin, higher rHuEPO doses, and higher intravenous iron doses. In the incident cohort, compared to patients with no VA infections or no catheter insertions (temporary or permanent), respectively, patients with 2 + VA infections or 2 + catheter insertions had 0.12 g/ dL and 0.06 g/ dL lower mean hemoglobin (P = 0.0028 and P < 0.0001), and 25.7% and 12.2% higher mean rHuEPO/ wk (P < 0.0001). Conclusion. Higher rHuEPO doses may be required to maintain similar or slightly lower mean hemoglobin values among chronic hemodialysis patients with higher numbers of catheter insertions and VA infections, compared to patients without any MH - Mexico|Distrito Federal MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 8 U4 - Urology & Nephrology U5 - J;Article AV - English IS - 0085-2538 UR - ISI:000225026200037 L2 - RISK-FACTORS; DIALYSIS PATIENTS; ERYTHROPOIETIN; RESISTANCE; COMPLICATIONS; SEPTICEMIA; BACTEREMIA; MORTALITY SO - Kidney International 2004 ;66(6):2429-2436 12228 UI - 706 AU - Robles C AU - Barea JM AD - IPN Oaxaca, CHDIR, Dpto Recursos Nat, Oaxaca 71230, MexicoCSIC, Estac Expt Zaidin, Dpto Microbiol Suelo & Sistemas Simbioticos, Granada, SpainRobles, C, IPN Oaxaca, CHDIR, Dpto Recursos Nat, C Hornos 1003, Oaxaca 71230, Mexico TI - Microbial-plant symbiosis and quality of soil in a degraded Mediterranean ecosystem AB - Rizospheric and no rhizospheric soil samples were taken in a Mediterranean degraded ecosystem corresponding to an << albaidal >> from Sierra de los Filabres (Almeria, Espana) from november 1996 to march 1998. Arbuscular mycorrhizal fungi propagules densities and nitrogen fixing bacteria (Rhizobium), associated to Anthyllis cytisoides, showed variations according with climatic stationality. Roots and its associated soil microorganisms clearly and positively affected all the biological and physicochemical analyzed parameters. This effect is indicative of the transcendental role of these microorganisms in the regeneration of degraded soils MH - Mexico|Oaxaca MH - Spain PB - PISA 56100: IST CHIMICA AGRARIA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Soil Science U5 - J;Article AV - Spanish IS - 0002-1857 UR - ISI:000233142600002 L2 - INFECTION; ROOTS SO - Agrochimica 2004 ;48(3-4):99-103 12229 UI - 5599 AU - Robles M AU - de Haro ML AU - Santos A AD - UNAM, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Extremadura, Dept Fis, E-06071 Badajoz, SpainRobles, M, UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico TI - Equation of state of a seven-dimensional hard-sphere fluid. Percus-Yevick theory and molecular-dynamics simulations AB - Following the work of Leutheusser [Physica A 127, 667 (1984)], the solution to the Percus-Yevick equation for a seven-dimensional hard-sphere fluid is explicitly found. This allows the derivation of the equation of state for the fluid taking both the virial and the compressibility routes. An analysis of the virial coefficients and the determination of the radius of convergence of the virial series are carried out. Molecular-dynamics simulations of the same system are also performed and a comparison between the simulation results for the compressibility factor and theoretical expressions for the same quantity is presented. (C) 2004 American Institute of Physics MH - Mexico|Morelos MH - Spain PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 11 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000221146400025 L2 - D-DIMENSIONAL SPHERES; VOLUME FUNCTION-APPROACH; 4TH VIRIAL-COEFFICIENTS; BINARY-MIXTURES; ARBITRARY DIMENSIONALITY; HYPERSPHERES; DISKS; THERMODYNAMICS; 5TH; 3RD SO - Journal of Chemical Physics 2004 ;120(19):9113-9122 12230 UI - 4521 AU - Rocha-Uribe A AU - Hernandez E AD - Texas A&M Univ, Food Prot R&D Ctr, College Stn, TX 77843, USARocha-Uribe, A, Dr Manuel Nava 6,Zona Univ, San Luis Potosi 78210, Mexico TI - Solvent-free enzymatic synthesis of structured lipids containing CLA from coconut oil and tricaprylin AB - Lipase-catalyzed acidolysis of different TAG with CLA was performed to produce structured lipids (SL) containing CLA. An immobilized lipase from Mucor miehei (Lipozyme IM, Novo Nordisk Inc., Franklinton, NC) was used as the biocatalyst in a solvent-free system. Coconut oil and tricaprylin, which are sources of medium-chain FA, were the starting substrates, and a mixture of FFA (MFFA) containing 73% CLA was the donor of the acyl groups. For each TAG, four different ratios of TAG/MFFA were blended to prepare about 500 g of mixture containing 10, 20, 30, and 40% CLA (w/w). Each blend was reacted with 5% lipase at 65degreesC for 48 h under nitrogen. Over the range of TAG/MFFA ratios examined, CLA was incorporated effectively by the enzyme. Lipozyme IM exhibited no special preference for any particular FA, since the incorporation of FA was proportional to their concentration in the system. FFA, PV, p-anisidine value (p-AV), iodine value (IV), and saponification number (SN) were evaluated for all the SL. FFA, PV, and p-AV depended on the purification process and showed no significant deterioration of SL with respect to the original TAG, whereas IV and SN depended on the composition of the SL, mainly the CLA content MH - Mexico|San Luis Potosi MH - USA PB - CHAMPAIGN: AMER OIL CHEMISTS SOC A O C S PRESS RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0003-021X UR - ISI:000223607900010 L2 - coconut oil;conjugated linoleic acid;lipases;solvent-free acidolysis;structured lipids;tricaprylin;CONJUGATED LINOLEIC-ACID; LIPASE-CATALYZED INCORPORATION; INTERESTERIFICATION ACIDOLYSIS; ORGANIC-SOLVENTS; FATTY-ACIDS; TRISTEARIN; ENRICHMENT; REACTOR; FISH SO - Journal of the American Oil Chemists Society 2004 ;81(7):685-689 12231 UI - 5503 AU - Rocquefelte X AU - Rignanese GM AU - Meunier V AU - Terrones H AU - Terrones M AU - Charlier JC AD - Univ Catholique Louvain, Unite Physico Chim & Phys Mat, B-1348 Louvain, BelgiumUniv Catholique Louvain, CERMIN, B-1348 Louvain, BelgiumOak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831, USAIPICYT, Adv Mat Dept, San Luis Potosi 78210, MexicoCharlier, JC, Univ Catholique Louvain, Unite Physico Chim & Phys Mat, Pl Croix Sud 1, B-1348 Louvain, Belgium TI - How to identify Haeckelite structures: A theoretical study of their electronic and vibrational properties AB - First-principles (FP) calculations of the electronic and vibrational properties of three different Haeckelite structures have been performed. The relatively low cohesive energies (when compared to C-60) of these phases suggest the possible synthesis of such novel carbon arrangements. In agreement with previous tight-binding calculations (Terrones, H.; Terrones, M.; Hernandez, E.; Grobert, N.; Charlier, J.-C.; Ajayan, P. M. Phys. Rev. Lett. 2000, 84, 1716), the Haeckelite structures exhibit a clear metallic behavior. In addition, within the ab initio framework, we predict the IR and Raman frequencies, which constitute the fingerprint of their structure and allow for their unambiguous identification. STM images and quantum conductances of various tubular Haeckelite structures are also calculated within a tight-binding framework. The three investigated Haeckelite structures are shown to be good candidates of conducting wires with great potential in nanoelectronics. The results presented here provide a catalog of properties that will aid in the identification of other Haeckelite structures as well as carbon systems containing pentagonal and heptagonal defects MH - Belgium MH - Mexico|San Luis Potosi MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1530-6984 UR - ISI:000221410000009 L2 - CARBON NANOTUBES; FULLERENE; COMPUTATION; TUBULES; PLANAR; STM SO - Nano Letters 2004 ;4(5):805-810 12232 UI - 3893 AU - Rodiriguez-Tovar LE AU - Speare DJ AU - Markham RJF AU - Daley J AD - Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, Charlottetown, PE C1A 4P3, CanadaUnidad Univ Mederos, Dept Patol, Fac Med Vet & Zootecn, Monterrey 64930, NL, MexicoSpeare, DJ, Univ Prince Edward Isl, Atlantic Vet Coll, Dept Pathol & Microbiol, 550 Univ Ave, Charlottetown, PE C1A 4P3, Canada TI - Predictive modelling of post-onset xenoma growth during microsporidial gill disease (Loma salmonae) of salmonids AB - Loma salmonae, an obligate intracellular microsporidian parasite, is the causal agent of microsporidial gill disease of salmon (MGDS), characterized by the production, growth and eventual rupture of spore-filled xenomas. MGDS in farmed chinook salmon remains occult until xenoma rupture, at which time the infected fish respond with intense branchitis and high rates of mortality The present study showed that in experimentally infected fish the rate of change of xenoma diameter could be modelled through regression analysis, particularly through the period of 4-9 weeks post-infection, yielding the predictive equation: xenoma diameter = - 42.9 microns + 15.3 microns x (number of weeks post-infection). This provides a tool for diagnosticians to predict the time to xenoma rupture and hence to the initiation of the clinical phase of MGDS MH - Canada MH - Mexico|Nuevo Leon PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Pathology;Veterinary Sciences U5 - J;Article AV - English IS - 0021-9975 UR - ISI:000225124500009 L2 - fish;Loma salmonae;microsporidial gill disease;parasitic infection;salmonids;xenoma;ONCORHYNCHUS-MYKISS WALBAUM; RAINBOW-TROUT; TISSUE DISTRIBUTION; CHINOOK SALMON; WATER; TRANSMISSION; TEMPERATURE; PROTOZOA SO - Journal of Comparative Pathology 2004 ;131(4):330-333 12233 UI - 5385 AU - Rodopoulos CA AU - Curtis SA AU - de los Rios ER AU - SolisRomero J AD - Sheffield Hallam Univ, Mat Engn Res Inst, Sheffield S1 1WB, S Yorkshire, EnglandUniv Sheffield, Dept Engn Mech, Struct Integrit Res Inst, Sheffield S1 3JD, S Yorkshire, EnglandInst Technol Tlalnepantla, Mexico City 54070, DF, MexicoRodopoulos, CA, Sheffield Hallam Univ, Mat Engn Res Inst, City Campus,Howart St, Sheffield S1 1WB, S Yorkshire, England TI - Optimisation of the fatigue resistance of 2024-T351 aluminium alloys by controlled shot peening - methodology, results and analysis AB - A methodology dedicated to the optimisation of the fatigue properties of aluminium alloys by controlled shot peening is presented. Selection of the peening conditions is made out of the use of the Design of Experiment and the Effects Neutralisation Model. Both techniques allowed the optimisation both in terms of life and crack growth rates. Experimental determination and further analysis of the residual stress relaxation patterns revealed that at high stress levels, low cycle fatigue, life improvement is predominantly due to slow crack growth rates, while in high cycle fatigue the extension of life is attributed to a prolonged period of crack arrest. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Mechanical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0142-1123 UR - ISI:000221684700006 L2 - controlled shot peening;fatigue life;residual stresses;surface roughness;CRACK-GROWTH; STRENGTH; DAMAGE SO - International Journal of Fatigue 2004 ;26(8):849-856 12234 UI - 5142 AU - Rodriguez-Angeles A AU - Nijmeijer H AD - Inst Mexicano Petr, Program Appl & Computat Math, Mexico City 07730, DF, MexicoEindhoven Univ Technol, Dept Mech Engn, NL-5600 MB Eindhoven, NetherlandsRodriguez-Angeles, A, Inst Mexicano Petr, Program Appl & Computat Math, Mexico City 07730, DF, Mexico TI - Mutual synchronization of robots via estimated state feedback: A cooperative approach AB - In this paper, a controller that solves the problem of position synchronization of two (or more) robot systems, under a cooperative scheme, in the case when only position measurements are available, is presented. The synchronization controller consists of a feedback control law and a set of nonlinear observers. Coupling errors are introduced to create interconnections that render mutual synchronization of the robots. It is shown that the controller yields semiglobal exponential convergence of the synchronization closed-loop errors. Experimental results show, despite obvious model uncertainties, a good agreement with the predicted convergence MH - Mexico|Distrito Federal MH - Netherlands PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 8 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1063-6536 UR - ISI:000222277800005 L2 - cooperative systems;feedback systems;multiple manipulators;observers;synchronization;MULTIPLE MANIPULATORS; CONTROLLER; FRICTION; SYSTEM SO - Ieee Transactions on Control Systems Technology 2004 ;12(4):542-554 12235 UI - 7297 AU - Rodriguez-Chong A AU - Ramirez JA AU - Garrote G AU - Vazquez M AD - Univ Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Lugo 27002, SpainUniv Autonoma Tamaulipas, UAM Mante, Dept Food Engn, Tamaulipas 89840, MexicoUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Tamaulipas 88770, MexicoUniv Vigo, Fac Ciencias, Dept Enxeneria Quim, Orense, SpainVazquez, M, Univ Santiago de Compostela, Escuela Politecn Super, Area Tecnol Alimentos, Campus Lugo, Lugo 27002, Spain TI - Hydrolysis of sugar cane bagasse using nitric acid: a kinetic assessment AB - Sugar cane bagasse was hydrolysed using nitric acid at variable concentration (2-6%), reaction time (0-300 min) and temperature (100-128 degreesC). The concentration of sugars released (xylose, glucose and arabinose) and degradation products (acetic acid and furfural) were determined and the kinetic parameters of mathematical models for predicting them in the hydrolysates were obtained. The influence of temperature was also studied using the Arrhenius equation. Applying the kinetic models obtained, the optimal conditions selected were: 122 degreesC, 6%, HNO3 and 9.3 min. Using these conditions, 18.6 g xylose/l; 2.04 g arabinose/l; 2.87 g glucose/1; 0.9 g acetic acid/l and 1.32 g furfural/l were obtained. Comparison of these results with those obtained using sulphuric and hydrochloric acids demonstrated that the nitric acid was the most efficient catalyst for hydrolysis. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 8 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000185852400001 L2 - sugar caned;bagasse;xylose;glucose;arabinose;kinetic;nitric acid;modeling;acid hydrolysis;PINUS-PINASTER WOOD; BIOTECHNOLOGICAL PRODUCTION; SACCHAROMYCES-CEREVISIAE; HEMICELLULOSIC FRACTION; AUTOHYDROLYSIS LIQUORS; ETHANOL-PRODUCTION; PICHIA-STIPITIS; FERMENTATION; PREHYDROLYSIS; EUCALYPTUS SO - Journal of Food Engineering 2004 ;61(2):143-152 12236 UI - 4787 AU - Rodriguez-Cuamatzi P AU - Vargas-Diaz G AU - Maris T AU - Wuest JD AU - Hopfl H AD - Univ Autonoma Estado Morelos, Ctr Inverstigac Quim, Cuernavaca 62210, Morelos, MexicoUniv Montreal, Dept Chim, Montreal, PQ H3C 3J7, CanadaHopfl, H, Univ Autonoma Estado Morelos, Ctr Inverstigac Quim, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - 1,4-Phenylenediboronic acid AB - In the crystal structure of the title compound, C6H8B2O4, centrosymmetric 1,4-phenylenediboronic acid molecules are linked by characteristic hydrogen bonding of B(OH)(2) groups. Primary association involves the formation of centrosymmetric cyclic dimers which leads to the formation of linear chains; these, in turn, associate by secondary hydrogen bonding, via unit-cell translations in the a axis direction, to form sheets MH - Canada MH - Mexico|Morelos PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 5 U4 - Crystallography U5 - J;Article AV - English IS - 1600-5368 UR - ISI:000223069000089 L2 - PHENYLBORONIC ACID; CRYSTAL-STRUCTURES; SOLID-STATE; DERIVATIVES; AFFINITY; SYSTEMS; BINDING; BOND SO - Acta Crystallographica Section E-Structure Reports Online 2004 ;60():O1316-O1318 12237 UI - 2502 AU - Rodriguez-Fuentes G AU - Garcia GP AU - Rodriguez II AU - Rebollar BM AU - Betancourt LM AU - Concepcion RB AU - Bogdanchikova N AD - Univ Havana, Zeolite Engn Lab, Inst Mat & Reagents, Havana 10400, Cuba. CSIC, Inst Catalisis & Petr Quim, Dept Ingn Proc Catalit, Madrid 28049, Spain. UNAM, Ctr Ciencias Mat Condensada, Mexicali, Baja California, Mexico TI - Environmental remediation uses of honeycomb monoliths based on natural clinoptilolite AB - Honeycomb monoliths based on natural heulandite-clinoptilolite were obtained using hydrothermal treatments instead of ordinary procedure of high temperature ceramization, preserving the physical and chemical properties of the zeolite. The monoliths were used to remove Cr(III) cations from tannery waste waters and to reduce the bacteria contamination of drinking water MH - Cuba MH - Mexico|Baja California MH - Spain T3 - RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALSStudies in surface science and catalysis PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U4 - Chemistry, Physical U5 - S;Article NT - SEnglishArticlegerardo@ff.oc.uh.cu pavila@icp.csic.es0SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSSTUD SURF SCI CATALPart A-CBBR47 AV - English IS - 0167-2991 UR - ISI:000227357202057 SO - 2004 ;():2555-2559 12238 UI - 5767 AU - Rodriguez-Gonzalez GL AU - Martinez-Samayoa PM AU - Nathanielsz PW AU - Zambrano E AD - Inst Nacl Ciencias Med & Nutr, Dept Reprod Biol, Mexico City, DF, MexicoNYU, Sch Med, Dept Obstet & Gynecol, Ctr Womens Hlth Res, New York, NY, USA TI - Maternal low protein diet during pregnancy or lactation delays testicular descent and reduces fertility in male offspring MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 1071-5576 UR - ISI:000220184500303 SO - Journal of the Society for Gynecologic Investigation 2004 ;11(2):175A-175A 12239 UI - 4185 AU - Rodriguez-Huezo ME AU - Pedroza-Islas R AU - Prado-Barragan LA AU - Beristain CI AU - Vernon-Carter EJ AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol Ingn Proc & Hidraul, Mexico City 09340, DF, MexicoUniv Iberoamer, Dept Ingn & Ciencias Quim, Santa Fe, NM, USAUniv Veracruzana, Inst Ciencias Bas, Xalapa 91000, Veracruz, MexicoVernon-Carter, EJ, Univ Autonoma Metropolitana Iztapalapa, Dept Biotecnol Ingn Proc & Hidraul, Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Microencapsulation by spray drying of multiple emulsions containing carotenoids AB - Water-in-oil-in-water (W-1/O/W-2) Multiple emulsions with 25% and 35% solids contents were spray-dried producing microcapsules with 3.9:1, 2.6:1, and 1.4:1 biopolymers blend to primary emulsion ratios and 0.25% (w/w) theoretical carotenoids concentration. Microcapsules with better morphology, encapsulation efficiency, and larger particle size were those obtained from higher biopolymers blend to primary emulsion ratios and solids content, but showed relatively higher carotenoids degradation kinetics than microcapsules made with lower biopolymers blend to primary emulsion ratios and solids content, which exhibited poorer morphology, encapsulation efficiency, and smaller particle size. Microcapsules stored at different water activities showed maximum carotenoids degradation at a water activity (a(w)) of 0.628, with lower carotenoids degradation occurring at lower or higher a(w) MH - Mexico|Distrito Federal MH - Mexico|Veracruz MH - USA PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 9 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000224384000022 L2 - multiple emulsions;carotenoids;microcapsules;morphology;water activity;IN-WATER EMULSIONS; BETA-CAROTENE; CANCER PREVENTION; WALL MATERIAL; STABILITY; OLEORESIN; FOODS; OXIDATION; MESQUITE; PROSOPIS SO - Journal of Food Science 2004 ;69(7):E351-E359 12240 UI - 6115 AU - Rodriguez-Iturbe B AU - Vaziri ND AU - Herrera-Acosta J AU - Johnson RJ AD - Univ Zulia, Inst Inmunobiol Fundacite Zulia, Univ Hosp, Serv Nefrol, Maracaibo 400 A, VenezuelaUniv Calif Irvine, Dept Med Physiol & Biophys, Div Nephrol & Hypertens, Irvine, CA 92697, USAInst Nacl Cardiol Ignacio Chavez, Dept Nefrol, Mexico City 14080, DF, MexicoUniv Florida, Div Renal, Gainesville, FL 32610, USARodriguez-Iturbe, B, Univ Zulia, Inst Inmunobiol Fundacite Zulia, Univ Hosp, Serv Nefrol, Maracaibo 400 A, Venezuela TI - Oxidative stress, renal infiltration of immune cells, and salt-sensitive hypertension: all for one and one for all AB - Recent evidence indicates that interstitial infiltration of T cells and macrophages plays a role in the pathogenesis of salt-sensitive hypertension. The present review examines this evidence and summarizes the investigations linking the renal accumulation of immune cells and oxidative stress in the development of hypertension. The mechanisms involved in the hypertensive effects of oxidant stress and tubulointerstitial inflammation, in particular intrarenal ANG II activity, are discussed, focusing on their potential for sodium retention. The possibility of autoimmune reactivity in hypertension is raised in the light of the proinflammatory and immunogenic pathways stimulated by the interrelationship between oxidant stress and inflammatory response. Finally, we present some clinical considerations derived from the recognition of this interrelationship MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 58 U4 - Physiology;Urology & Nephrology U5 - J;Review AV - English IS - 0363-6127 UR - ISI:000220033100002 L2 - interstitial nephritis;autoimmunity;reactive oxygen species;angiotensin;NF-KAPPA-B; HEAT-SHOCK-PROTEIN; SMOOTH-MUSCLE-CELLS; MYCOPHENOLATE-MOFETIL PREVENTS; NITRIC-OXIDE INACTIVATION; LEAD-INDUCED HYPERTENSION; LOW-DENSITY-LIPOPROTEIN; ANGIOTENSIN-II; BLOOD-PRESSURE; SUPEROXIDE-DISMUTASE SO - American Journal of Physiology-Renal Physiology 2004 ;286(4):F606-F616 12241 UI - 5404 AU - Rodriguez-Lopez JL AU - Montejano-Carrizales JM AU - Pal U AU - Sanchez-Ramirez JF AU - Troiani HE AU - Garcia D AU - Miki-Yoshida M AU - Jose-Yacaman M AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USAIPICYT, Adv Mat Dept, San Luis Potosi 78216, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Puebla, Fac Ciencias Quim, Inst Ciencias, Puebla 72570, MexicoInst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaComis Nacl Energia Atom, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUniv Texas, Texas Mat Inst, Austin, TX 78712, USACtr Invest Mat Avanzados SC, Chihuahua 31109, MexicoJose-Yacaman, M, Univ Texas, Dept Chem Engn, Austin, TX 78712, USA TI - Surface reconstruction and decahedral structure of bimetallic nanoparticles AB - We report on energetic surface reconstruction phenomena observed on bimetallic nanoparticle systems of AuPd and AuCu, similar to a resolidification effect observed during the cooling process in lead clusters. These binary alloy nanoparticles show the fivefold edges truncated, resulting in {100} facets on decahedral structures, an effect largely envisioned and reported theoretically, with no experimental evidence so far. We demonstrate experimentally as well as by computational simulations that this new eutectic structure is favored in such nanoalloy systems MH - Argentina MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Mexico|San Luis Potosi MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 21 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000221540900033 L2 - MULTIPLY-TWINNED PARTICLES; CLUSTERS; METALS; ALLOY; HREM; AU SO - Physical Review Letters 2004 ;92(19): 12242 UI - 5679 AU - Rodriguez-Lopez JL AU - guilera-Granja F AU - Michaelian K AU - Vega A AD - Inst Potosino Invest Cient & Tecnol, AC, San Luis Potosi 78231, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, E-47011 Valladolid, SpainRodriguez-Lopez, JL, Inst Potosino Invest Cient & Tecnol, AC, POB 3-74, San Luis Potosi 78231, Mexico TI - Magnetic structure of cobalt clusters AB - The magnetic moments of free standing Co-X clusters (4 less than or equal to N less than or equal to 55) were calculated through a self-consistent spd-tight-binding method. The lowest energy geometrical structures of these clusters were obtained by exhaustive global searches on a many-body Gupta potential energy surface using an evolutive algorithm. The relevant structures mainly follow an icosahedral growth pattern with some fcc-type structures at some particular sizes. The calculated magnetic moments demonstrate a decreasing behavior with cluster size with small superimposed oscillations. The calculations are good agreement with the available experimental data. Our results are briefly discussed and compared with other published theoretical results. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500024 L2 - nanostructures;magnetic order materials;low-dimensional systems;ELECTRONIC-PROPERTIES; TRANSITION-METALS; NICKEL CLUSTERS; CO CLUSTERS; NI CLUSTERS; DYNAMICS; IRON SO - Journal of Alloys and Compounds 2004 ;369(1-2):93-96 12243 UI - 4526 AU - Rodriguez-Martinez E AU - Rugerio-Vargas C AU - Rodriguez AI AU - Borgonio-Perez G AU - Rivas-Arancibia S AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Biol Celular & Tisular, Mexico City 04510, DF, MexicoHenry Ford Hlth Syst, Gossett Neurol Labs, Detroit, MI, USARivas-Arancibia, S, Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, AP 70-250, Mexico City 04510, DF, Mexico TI - Antioxidant effects of taurine, vitamin C, and vitamin E on oxidative damage in hippocampus caused by the administration of 3-nitropropionic acid in rats AB - The administration of 3-nitropropionic acid increases reactive oxygen species (ROS). Antioxidant defense mechanisms buffer these ROS converting them into non-damaging compounds. Taurine and vitamins C and E are antioxidants that play a role in the defense against cellular damage. This study examines the antioxidant effect of taurine, vitamin C, and vitamin E on acute hippocampal damage caused by 3-NP. Animals treated with 3-NP increased lipid peroxidation levels and astrocytic damage in the hippocampus. Administration of taurine, vitamin C, and vitamin E partially protected from oxidative damage, indicate that while all substances had antioxidant effects, only taurine showed morphological protection in surviving cells MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 9 U4 - Neurosciences U5 - J;Article AV - English IS - 0020-7454 UR - ISI:000223718400007 L2 - antioxidants;hippocampus;3-NP;oxidative stress;taurine;vitamin Q vitamin E;MITOCHONDRIAL TOXIN; HUNTINGTONS-DISEASE; BRAIN; LESIONS; NEUROTOXICITY; INVOLVEMENT; TOXICITY; STRESS SO - International Journal of Neuroscience 2004 ;114(9):1133-1145 12244 UI - 5619 AU - Rodriguez-Meza MA AU - Cervantes-Cota JL AD - Inst Nacl Invest Nucl, Dept Fis, Mexico City 11801, DF, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoAstrophys Inst Potsdam, D-14482 Potsdam, GermanyRodriguez-Meza, MA, Inst Nacl Invest Nucl, Dept Fis, POB 18-1027, Mexico City 11801, DF, Mexico TI - Potential-density pairs for spherical galaxies and bulges: the influence of scalar fields AB - A family of potential-density pairs has been found for spherical haloes and bulges of galaxies in the Newtonian limit of scalar-tensor theories of gravity. The scalar field is described by a Klein-Gordon equation with a source that is coupled to the standard Poisson equation of Newtonian gravity. The net gravitational force is given by two contributions: the standard Newtonian potential plus a term stemming from massive scalar fields. General solutions have been found for spherical systems. In particular, we compute potential-density pairs of spherical, galactic systems, and some other astrophysical quantities that are relevant to generate initial conditions for spherical galaxy simulations MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221095500027 L2 - elementary particles;stellar dynamics;galaxies : bulges;galaxies : haloes;galaxies : kinematics and dynamics;galaxies : structure;INDUCED GRAVITY INFLATION; ACCELERATING UNIVERSE; DARK-MATTER; MODEL; SUPERNOVAE; ENERGY; LIGHT SO - Monthly Notices of the Royal Astronomical Society 2004 ;350(2):671-678 12245 UI - 4134 AU - Rodriguez-Nava V AU - Couble A AU - Molinard C AU - Sandoval H AU - Boiron P AU - Laurent F AD - Univ Lyon 1, UMR CNRS 5557, Fac Pharm,Ctr Microbial Ecol,Opportunist Pathoge, Lab Mycol Fondamentale & Appliquee Biotechnol Ind, F-69373 Lyon 08, FranceUniv Autonoma Metropolitana, Dept Sist Biol, Lab Prod Biolog, Unidad Xochimilco, Mexico City, DF, MexicoLaurent, F, Univ Lyon 1, UMR CNRS 5557, Fac Pharm,Ctr Microbial Ecol,Opportunist Pathoge, Lab Mycol Fondamentale & Appliquee Biotechnol Ind, 8 Ave Rockefeller, F-69373 Lyon 08, France TI - Nocardia mexicana sp nov., a new pathogen isolated from human mycetomas AB - Three isolates collected from human mycetomas and showing an unusual brownish purple pigmentation on Bennett agar plates were analyzed by a polyphasic taxonomic approach, including morphological, biochemical, physiological, and chemotaxonomic properties coupled with genomic and phylogenetic analysis. It clearly appeared that these microorganisms were distinct from their closest phenotypic and genetic match, the most related species according to 16S rRNA gene sequence analysis being Nocardia pseudobrasiliensis. The data obtained indicated that the three clinical strains should be recognized as a new species for which the name Nocardia mexicana sp. nov. is proposed MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000224473000018 L2 - RIBOSOMAL-RNA GENE; RAPID IDENTIFICATION; RENATURATION RATES; SEQUENCE ALIGNMENT; DNA HYBRIDIZATION; STRAINS; BRASILIENSIS; RHODOCOCCUS; ASTEROIDES; PHYLOGENY SO - Journal of Clinical Microbiology 2004 ;42(10):4530-4535 12246 UI - 5045 AU - Rodriguez-Nogales JM AU - Perez-Mateos M AU - Busto MD AD - Univ Hidalgo State, Chem Res Ctr, Pachuca 42070, MexicoUniv Burgos, Dept Biotechnol & Food Sci, Burgos 09001, SpainRodriguez-Nogales, JM, Univ Hidalgo State, Chem Res Ctr, Carretera Pachuca Tulancingo Km 4-5, Pachuca 42070, Mexico TI - Application off experimental design to the formulation of glucose oxidase encapsulation by liposomes AB - Fractional factorial screening design and response surface methodology were applied to optimize the entrapment of glucose oxidase in liposomes by the dehydration-rehydration vesicle (DRV) method. Phosphatidylcholine from different sources, cholesterol:phosphatidylcholine (Ch:PC) and enzyme:lipid (E:L) ratios, buffer pH, sonication frequency and trehalose concentration were the parameters selected for this study. The type of phosphatidylcholine was found to be the most important factor followed by the trehalose concentration, Ch:PC ratio, sonication frequency and E:L ratio. The pH did not play an important role in the response. By treating liposomes with trehalose, as cryoprotectant, the activity of entrapped enzyme decreased by 16%. Two of the factors (cholesterol:phosphatidylcholine and enzyme:lipid ratios) were further studied in a 3(2) central composite design. The optimized liposomal formulation with an entrapment efficiency of 24% was obtained for egg yolk PC with Ch:PC and E:L ratios of 0.95 and 14.69, respectively, at pH 6 and applying a sonication frequency of 150 W. (C) 2004 Society of Chemical Industry MH - Mexico|Hidalgo MH - Spain PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 4 U4 - Biotechnology & Applied Microbiology;Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0268-2575 UR - ISI:000222376300005 L2 - experimental design;glucose oxidase;liposomes;microencapsulation;DRIED LIPOSOMES; VESICLES; ENZYMES SO - Journal of Chemical Technology and Biotechnology 2004 ;79(7):700-705 12247 UI - 6366 AU - Rodriguez-Perez MA AU - Lilley BG AU - Dominguez-Vazquez A AU - Segura-Arenas R AU - Lizarazo-Ortega C AU - Mendoza-Herrera A AU - Reyes-Villanueva F AU - Unnasch TR AD - Inst Politecn Nacl, Ctr Biotecnol Genomica, Reynosa 88710, Tamaulipas, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Lab Entomol Med, San Nicolas De Los Garza 66450, NL, MexicoSecretaria Salud Oaxaca, Programa Oncocerosis, Direcc Serv Salud, Oaxaca 68000, MexicoInst Salud Estado Chiapas, Direcc Serv Salud, Tuxtla Gutierrez 29007, Chiapas, MexicoUniv Alabama, Div Geog Med, Birmingham, AL 35294, USARodriguez-Perez, MA, Inst Politecn Nacl, Ctr Biotecnol Genomica, Blvd Maestro Esquina Elias Pina,Col Narciso Mendo, Reynosa 88710, Tamaulipas, Mexico TI - Polymerase chain reaction monitoring of transmission of Onchocerca volvulus in two endemic states in Mexico AB - To investigate the impact of mass ivermectin treatments in Mexico on Onchocerca volvulus transmission, entomologic surveys were carried out in the two endemic states of Oaxaca and Chiapas. The data suggest that substantial progress towards the goal of elimination has been made. A comparison pre- and post-ivermectin data from a community in Southern Chiapas showed a 97% decrease in seasonal transmission potential, but some level of polymerase chain reaction positivity was still detectable. In other communities from northern Chiapas and Oaxaca where there are no baseline data, there was an absence or near absence of infective flies. Residual transmission was not evenly distributed because differences were seen in the infection and infective rates from different catch points. These findings suggest that while substantial progress towards elimination has been made in Mexico, it may be necessary to modify ivermectin distribution strategies to eliminate transmission in areas where transmission persists MH - Mexico|Chiapas MH - Mexico|Nuevo Leon MH - Mexico|Oaxaca MH - Mexico|Tamaulipas MH - USA PB - MCLEAN: AMER SOC TROP MED & HYGIENE RP - NOT IN FILE U3 - TC 7 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0002-9637 UR - ISI:000188506600007 L2 - DENSITY-DEPENDENT PROCESSES; SIMULIUM-OCHRACEUM; IVERMECTIN TREATMENT; CONTROL PROGRAMS; SOUTHERN MEXICO; VECTOR CONTROL; SENSU-LATO; INFECTION; EPIDEMIOLOGY; POPULATIONS SO - American Journal of Tropical Medicine and Hygiene 2004 ;70(1):38-45 12248 UI - 3562 AU - Rodriguez-Ramos R AU - Pobedria BE AU - Padilla P AU - Bravo-Castillero J AU - Guinovart-Diaz R AU - Maugin GA AD - Univ Paris 06, CNRS, Lab Modelisat Mecan, UMR 7607,Case 162, F-75252 Paris 05, FranceUniv La Habana, Fac Matemat & Computac, Vedado 10400, Habana, CubaMoscow MV Lomonosov State Univ, Dept Composites, Moscow, RussiaUniv Nacl Autonoma Mexico, IIMAS, Mexico City 04510, DF, MexicoMaugin, GA, Univ Paris 06, CNRS, Lab Modelisat Mecan, UMR 7607,Case 162, 4 Pl Jussieu, F-75252 Paris 05, France TI - Variational principles for nonlinear piezoelectric materials AB - In the present paper, we consider the behavior of nonlinear piezoelectric materials by generalization for this case of the Hashin-Shtrikman variational principles. The new general formulation used here differs from others, because, it gives the possibility to evaluate the upper and lower Hashin-Shtrikman bounds for specific physical nonlinearities of piezoelectric materials. Geometrical nonlinearities are not considered MH - Cuba MH - France MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Mechanics U5 - J;Article AV - English IS - 0939-1533 UR - ISI:000226095500004 L2 - nonlinear piezoelectricity;composites;constitutive relations;effective properties;variational principles;COMPOSITE-MATERIALS; BOUNDS; MODULI; EQUATIONS SO - Archive of Applied Mechanics 2004 ;74(3-4):191-200 12249 UI - 5047 AU - Rodriguez-Ramos R AU - Monsivais G AU - Otero JA AU - Calas H AU - Guerra V AU - Stern C AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv La Habana, Fac Matemat & Computac, Vedado 4, Habana, CubaInst Tecnol & Estudios Super Monterrey, Mexico City, DF, MexicoICIMAF, Vedado 4, Habana, CubaUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoMonsivais, G, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Presence of Stark ladders in scattering of shear horizontal piezoelectric waves AB - The global matrix techniques are used in the analysis of the Stark-Ladder resonances for transverse horizontal and surface waves in piezoelectric multilayers. Stark-Ladder resonances are observed when these waves propagate inside composites consisting of N piezoelectric layers whose piezoelectric properties obey a special linear relation. Each layer is made of materials with hexagonal 6 mm symmetry. The resonances are studied through the transmission coefficient. The transmission coefficient shows the well known band structure for a periodic piezocomposite, and when a linear term in the values of the piezoelectric parameters of the layers (which breaks the periodicity) is added, the band structure is destroyed and, in certain cases, resonances of the Stark-Ladder type are shown. The transmission coefficient is studied as a function of the properties of the materials and angle of incidence of the waves. Numerical results for two different configurations of piezocomposites are presented, one of them showing the existence of Stark-Ladders resonances. An analysis of the resonance spectrum is given. (C) 2004 American Institute of Physics MH - Cuba MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000222391500038 L2 - QUASI-PERIODIC HETEROSTRUCTURES; SURFACE IMPEDANCE MATRIX; ELASTIC-WAVES; ANISOTROPIC MEDIA; ACOUSTIC-WAVES; ELECTRONIC-PROPERTIES; PLANAR DEFECTS; PROPAGATION; RESONANCES; MULTILAYERS SO - Journal of Applied Physics 2004 ;96(2):1178-1185 12250 UI - 3807 AU - Rodriguez-Rico CA AU - Viallefond F AU - Zhao JH AU - Goss WM AU - Anantharamaiah KR AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoObserv Paris, LERMA, F-75014 Paris, FranceHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USARaman Res Inst, Bangalore 560080, Karnataka, IndiaRodriguez-Rico, CA, Natl Radio Astron Observ, POB O, Socorro, NM 87801 USA TI - Very large array H92 alpha and H53 alpha radio recombination line observations of M82 AB - We present high angular resolution (0."6) observations made with the Very Large Array of the radio continuum at 8.3 and 43 GHz, as well as H92alpha and H53alpha radio recombination lines from the nearby (similar to3 Mpc) starburst galaxy M82. In the continuum we identify 58 sources at 8.3 GHz, of which 19 have no counterparts in catalogs published at other frequencies. At 43 GHz we identify 18 sources, unresolved at 0."6 resolution, of which five were unknown previously. The spatial distribution of the H92alpha line is inhomogeneous; we identify 27 features; about half of them are associated with continuum emission sources. Their sizes are typically in the range 2-10 pc. Although observed with poorer signal-to-noise ratio, the H53alpha line is detected. The line and continuum emission are modeled using a collection of H II regions at different distances from the nucleus. The observations can be interpreted assuming a single-density component, but equally well with two components if constraints originating from previous high-resolution continuum observations are used. The high-density component has a density of similar to4 x 10(4) cm(-3). However, the bulk of the ionization is in regions with densities that are typically a factor of 10 lower. The gas kinematics, using the H92alpha line, confirms the presence of steep velocity gradient (26 km s(-1) arcsec(-1)) in the nuclear region, as previously reported, in particular from observations of the [Ne II] line at 12 mum. This gradient has about the same amplitude on both sides of the nucleus. Since this steep gradient is observed not only on the major axis but also at large distances along a band at P. A. similar to150degrees, the interpretation in terms of x(2) orbits elongated along the minor axis of the bar, which would be observed at an angle close to the inclination of the main disk, seems inadequate. The observed kinematics cannot be modeled using a simple model that consists of a set of circular orbits observed at different tilt angles. Ad hoc radial motions must be introduced to reproduce the pattern of the velocity field. Different families of orbits are indicated since we detect a signature in the kinematics at the transition between the two plateaus observed in the NIR light distribution. These H92alpha data also reveal the base of the outflow where the injection toward the halo on the northern side occurs. The outflow has a major effect on the observed kinematics, present even in the disk at distances close to the nucleus. The kinematic pattern suggests a connection between the gas flowing in the plane of M82 toward the center; this behavior most likely is due to the presence of a bar and the outflow out of the plane MH - France MH - India MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225418100011 L2 - galaxies : individual (M82);galaxies : ISM;galaxies : starburst;HII regions;radio lines : galaxies;STARBURST GALAXY M82; H-II REGIONS; SUPERNOVA-REMNANTS; BARRED GALAXY; NUCLEUS; NGC-253; RESOLUTION; CONTINUUM; EMISSION; M-82 SO - Astrophysical Journal 2004 ;616(2):783-803 12251 UI - 6560 AU - Rodriguez-Rios H AU - Nuno-Donlucas SM AU - Puig JE AU - Gonzalez-Nunez R AU - Schulz PC AD - Univ Guadalajara, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoUniv Nacl Sur, Dept Quim, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaGonzalez-Nunez, R, Univ Guadalajara, Dept Ingn Quim, Boul M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Compatibilization of polystyrene and polyamide 6 mixtures with poly(styrene-co-sodium acrylate) AB - In this work, the compatibilization of polystyrene-and-nylon 6 mixtures with the ionomer, poly(styrene-co-sodium acrylate), is investigated. The ionomer was synthesized by emulsion polymerization. Scanning electron microscopy reveals that an appreciable size reduction of the dispersed phase is achieved in the whole composition range, when small amounts of the ionomer were added. IR spectroscopy and water absorption tests disclose that a chemical reaction occurs between the carboxylic group of the ionomer and the terminal amine group of the polyamide 6, which allows the compatibilization process. (C) 2003 Wiley Periodicals, Inc MH - Argentina MH - Mexico|Jalisco PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 7 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000187712400045 L2 - compatibilization;ionomers;morphology;blends;MORPHOLOGICAL STABILITY; MECHANICAL-PROPERTIES; POLYETHYLENE BLENDS; SODIUM ACRYLATE; STYRENE; POLYPROPYLENE; COPOLYMERS; POLYMER; NYLON-6 SO - Journal of Applied Polymer Science 2004 ;91(3):1736-1745 12252 UI - 4239 AU - Rodriguez-Romero F AU - Smith GR AU - Cuellar O AU - De la Cruz FRM AD - Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoDenison Univ, Dept Biol, Granville, OH 43023, USAUniv Utah, Dept Biol, Salt Lake City, UT 84112, USARodriguez-Romero, F, Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Ciudad Univ,Circuito Exterior AP 70-153, Mexico City 04510, DF, Mexico TI - Reproductive traits of a high elevation viviparous lizard Sceloporus bicanthalis (Lacertilia : Phrynosomatidae) from Mexico AB - Several species of lizards exhibit significant annual variation in reproductive traits; however, most work in this area focused on populations from temperate latitudes or low to medium elevations. We examined annual variation in litter size, neonate size, and relative litter mass in a high elevation (4200 m) population of the viviparous lizard, Sceloporus bicanthalis from the Volcano Nevado de Toluca, Mexico. We found little evidence for annual variation in reproduction in this population. Female body size influenced litter size and litter mass. Relative litter mass in this population (0.47) was among the highest reported for any Sceloporus and may be a consequence of a nearly "annual" life cycle. Mean neonate size was not affected by female SVL or litter size, suggesting it may be optimized in this population MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000224220900017 L2 - LIFE-HISTORY; COMPARATIVE DEMOGRAPHY; CLUTCH SIZE; SOUTHEASTERN ARIZONA; OFFSPRING SIZE; 2 POPULATIONS; UNDULATUS; VIRGATUS; MUCRONATUS; GRACIOSUS SO - Journal of Herpetology 2004 ;38(3):438-443 12253 UI - 3846 AU - Rodriguez-Saldana J AU - Clark CM AU - de Teresa MM AU - Escorza-Dominguez AB AU - Ortiz-Gress AA AU - Monroy-Mayorga A AU - Mejia-Pedraza BJ AD - Coordinac Invest, Res Ctr, Pachuca, Hidalgo, MexicoIndiana Univ, Indianapolis, IN 46204, USA TI - Effectiveness of a structured program on the quality of outpatient diabetes care: experiences from Hidalgo, Mexico MH - Mexico|Hidalgo MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0012-186X UR - ISI:000223951600985 SO - Diabetologia 2004 ;47():A354-A354 12254 UI - 6155 AU - Rodriguez-Sanchez JE AU - Dover WD AU - Brennan FP AD - Inst Mexicano Petr, Edificio SIPE, Mexico City 07730, DF, MexicoUniv Coll London, Dept Engn Mech, London WC1 7JE, EnglandRodriguez-Sanchez, JE, Inst Mexicano Petr, Edificio SIPE, Eje Cent Lazaro Cardenas 152,28,Piso 1,Cubiculo 1, Mexico City 07730, DF, Mexico TI - Application of short repairs for fatigue life extension AB - The application of a new fatigue crack repair concept defined as 'short repair' is presented. This concept is based on crack removal by cutting. The objective of using a short repair is to extend the fatigue life of cracked welded connections. A short repair is an option to repair fatigue cracks, particularly for offshore structures where diving intervention is of high risk and the application of remote operated vehicles is an alternative. Short repairs were machined on welded T-butt plates by disc cutting. Experimental data have been analysed to determine crack growth rates, crack initiation and fatigue life extension after crack repair. Conclusions and recommendations are given. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0142-1123 UR - ISI:000189129500009 L2 - fatigue;repair;crack SO - International Journal of Fatigue 2004 ;26(4):413-420 12255 UI - 4828 AU - Rodriguez-Sosa M AU - Saavedra R AU - Tenorio EP AU - Rosas LE AU - Satoskar AR AU - Terrazas LI AD - Inst Nacl Cardiol Ignacio Chavez, Dept Immunol, Mexico City 14080, DF, MexicoUniv Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Unidad Biomed, FES Iztacala, Mexico City 54090, DF, MexicoOhio State Univ, Dept Microbiol, Columbus, OH 43210, USASatoskar, AR, Inst Nacl Cardiol Ignacio Chavez, Dept Immunol, J Badiano 1, Mexico City 14080, DF, Mexico TI - A STAT4-dependent Th1 response is required for resistance to the helminth parasite Taenia crassiceps AB - To determine the role of STAT4-dependent Th1 responses in the regulation of immunity to the helminth parasite Taenia crassiceps, we monitored infections with this parasite in resistant mice lacking the STAT4 gene. While T. crassiceps-infected STAT4(+/+) mice rapidly resolved the infection, STAT4(-/-) mice were highly susceptible to infection and displayed large parasite loads. Moreover, the inability of STAT4(-/-) mice to control the infection was associated with the induction of an antigen-specific Th2-type response characterized by significantly higher levels of Th2-associated immunoglobulin G1 (IgG1) and total IgE as well as interleukin-4 (IL-4), IL-10, and IL-13 than those in STAT4(+/+) mice, who produced significantly more gamma interferon. Furthermore, early after infection, macrophages from STAT4(-/-) mice produced lower levels of the proinflammatory cytokines IL-12, tumor necrosis factor alpha, IL-1beta, and nitric oxide (NO) than those from STAT4(+/+) mice, suggesting a pivotal role for macrophages in mediating protection against cysticercosis. These findings demonstrate a critical role for the STAT4 signaling pathway in the development of a Th1-type immune response that is essential for mediating protection against the larval stage of T. crassiceps infection MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0019-9567 UR - ISI:000222932600029 L2 - ALTERNATIVELY ACTIVATED MACROPHAGES; SCHISTOSOMA-MANSONI; PROTECTIVE IMMUNITY; BRUGIA-MALAYI; NITRIC-OXIDE; T-CELLS; MICE; INFECTION; PROLIFERATION; CYSTICERCOSIS SO - Infection and Immunity 2004 ;72(8):4552-4560 12256 UI - 3762 AU - Rodriguez-Tello E AU - Torres-Jimenez J AD - Univ Angers, LERIA, F-49045 Angers, France. ITESM Campus Cuernavaca, Dept Comp Sci, Temixco 62589, Morelos, Mexico TI - Improving the performance of a genetic algorithm using a variable-reordering algorithm AB - Genetic algorithms have been successfully applied to many difficult problems but there have been some disappointing results as well. In these cases the choice of the internal representation and genetic operators greatly conditions the result. In this paper a CA and a reordering algorithm were used for solve SAT instances. The reordering algorithm produces a more suitable encoding for a CA that enables a CA performance improvement. The attained improvement relies on the building-block hypothesis, which states that a GA works well when short, low-order, highly-fit schemata (building blocks) recombine to form even more highly fit higher-order schemata. The reordering algorithm delivers a representation which has the most related bits (i.e. Boolean variables) in closer positions inside the chromosome. The results of experimentation demonstrated that the proposed approach improves the performance of a simple CA in all the tests accomplished. These experiments also allow us to observe the relation among the internal representation, the genetic operators and the performance of a GA MH - France MH - Mexico|Morelos T3 - GENETIC AND EVOLUTIONARY COMPUTATION GECCO 2004Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleertello@info.univ-angers.fr jtj@itesm.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBD76 AV - English IS - 0302-9743 UR - ISI:000225040600010 SO - 2004 ;():102-113 12257 UI - 4176 AU - Rodriguez-Tello E AU - Hao JK AU - Torres-Jimenez J AD - Univ Angers, LERIA, F-49045 Angers, FranceITESM Campus Cuernavaca, Comp Sci Dept, Temixco 62589, Morelos, MexicoRodriguez-Tello, E, Univ Angers, LERIA, 2 Blvd Lavoisier, F-49045 Angers, France TI - An improved evaluation function for the bandwidth minimization problem AB - This paper introduces a new evaluation function, called delta, for the Bandwidth Minimization Problem for Graphs (BMPG). Compared with the classical beta evaluation function used, our delta function is much more discriminating and leads to smoother landscapes. The main characteristics of delta are analyzed and its practical usefulness is assessed within a Simulated Annealing algorithm. Experiments show that thanks to the use of the delta function, we are able to improve on some previous best results of a set of well-known benchmarks MH - France MH - Mexico|Morelos PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224103300066 L2 - bandwidth evaluation function;bandwidth minimization problem;heuristics;simulated annealing SO - Parallel Problem Solving from Nature - Ppsn Viii 2004 ;3242():652-661 12258 UI - 3761 AU - Rodriguez-Torres R AU - Gutirrez-Dominguez EA AU - Klima R AU - Selberherr S AD - Vienna Tech Univ, Inst Microelect, A-1040 Vienna, AustriaINAOE, Dept Elect, Puebla, MexicoRodriguez-Torres, R, Vienna Tech Univ, Inst Microelect, Vienna 27-29-E360, A-1040 Vienna, Austria TI - Analysis of split-drain MAGFETs AB - We present fully three-dimensional simulation results of two-drain and three-drain magnetic field-effect transistors (MAGFETs), magnetic sensors based on metal-oxide-semiconductor field-effect transistor (MOSFET) structures. By proper development and discretization of the current density equations comprising the nonzero magnetic field components, a two-drain MAGFET is analyzed at both 77 K and 300 K. The discretization scheme is implemented in the general purpose multidimensional device and circuit simulator MINIMOS-NT which is used to investigate the relative sensitivity, the main figure of merit of any magnetic sensor, as a function of the geometric parameters and bias conditions. Besides, the physical modeling of silicon at 77 K and the Hall scattering factors for the silicon inversion layers are discussed. Our simulation results perfectly match the available experimental data. New in-depth knowledge can be obtained by simulating MOSFET structures at 77 K in the presence of an arbitrary magnetic field MH - Austria MH - Mexico|Puebla PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9383 UR - ISI:000225362900041 L2 - low-temperature analysis;magnetic sensor;physical modeling;split-drain magnetic field-effect transistors (MAGFETs);three-dimensional (3-D) simulation;MAGNETIC-FIELD SENSORS; SQUID MAGNETOMETERS; NOISE PROPERTIES; SENSITIVITY SO - Ieee Transactions on Electron Devices 2004 ;51(12):2237-2245 12259 UI - 5197 AU - Rodriguez-Vazquez K AU - Fonseca CM AU - Fleming PJ AD - Natl Autonomous Univ Mexico, Inst Appl Math & Syst, Mexico City 04510, DF, MexicoUniv Algarve, Ctr Intelligence Syst, P-8005117 Faro, PortugalUniv Sheffield, Dept Automat Control & Syst Engn, Sheffield S1 3JD, S Yorkshire, EnglandRodriguez-Vazquez, K, Natl Autonomous Univ Mexico, Inst Appl Math & Syst, Circuito Escolar,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Identifying the structure of nonlinear dynamic systems using multiobjective genetic programming AB - A method for identifying the structure of nonlinear polynomial dynamic models is presented. This approach uses an evolutionary algorithm, genetic programming, in a multiobjective fashion to generate global models which describe the dynamic behavior of the nonlinear system under investigation. The validation stage of system identification is simultaneously evaluated using the multiobjective tool, in order to direct the identification process to a set of global models of the system MH - United Kingdom MH - Mexico|Distrito Federal MH - Portugal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Cybernetics;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 1083-4427 UR - ISI:000222135600009 L2 - gas turbine engine;genetic programming (GP?);multiobjective optimization;nonlinear system identification;EVOLUTIONARY ALGORITHMS; IDENTIFICATION SO - Ieee Transactions on Systems Man and Cybernetics Part A-Systems and Humans 2004 ;34(4):531-545 12260 UI - 6422 AU - Rodriguez-Vivas RI AU - Mata-Mendez Y AU - Perez-Gutierrez E AU - Wagner G AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Merida 9700, Yucatan, MexicoUniv Nacl, Fac Med Vet, Heredia, Costa RicaTexas A&M Univ, Coll Vet Med, Dept Vet Pathobiol, College Stn, TX 77843, USARodriguez-Vivas, RI, Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Km 15-5 Carretera Merida Xmatkuil, Merida 9700, Yucatan, Mexico TI - The effect of management factors on the seroprevalence of Anaplasma marginale in Bos indicus cattle in the Mexican tropics AB - A cross-sectional study with a two-stage design and proportional distribution was carried out to determine the effect of management factors on the seroprevalence of Anaplasma marginale in Bos indicus cattle in the Mexican tropics. Serum was obtained from 384 cattle aged 1-2 years on 92 farms. The number of samples was proportionally distributed according to the number of farms in eastern Yucatan. Antibody activity against A. marginale was assessed using the card agglutination test. A primary screening using a 2 x K contingency table of the exposed variables with the outcomes was performed. All variables for which p<0.20 were included in a fixed-effects log regression. The seroprevalence in the cattle was 69.75% (SE +/- 0.02). Sixty-four per cent of the farms had a seroprevalence &GE; 75%. The risks related to managemental factors were stocking density ( &GE; 1 animal/ ha, OR = 10.94), type of acaricide (pyrethroids, OR = 3.8), dipping interval (> 60 days, OR = 0. 13) and type of veterinary instruments used (needles, scalpels, ear tattoos, and dehorners, OR = 0. 17) MH - Costa Rica MH - Mexico|Yucatan MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0049-4747 UR - ISI:000188079900004 L2 - acaricide;Anaplasma marginale;cattle;dipping;serology;stocking density;veterinary instruments;COMPLEMENT-FIXING ANTIBODIES; BOVINE ANAPLASMOSIS; COSTA-RICA; EPIDEMIOLOGY; BABESIOSIS; PREVALENCE SO - Tropical Animal Health and Production 2004 ;36(2):135-143 12261 UI - 5929 AU - Rodriguez C AU - Kwon O AU - Georgellis D AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoKorea Res Inst Biosci & Biotechnol, Lab Metab Engn, Taejon 305333, South KoreaGeorgellis, D, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, Mexico TI - Effect of D-lactate on the physiological activity of the ArcB sensor kinase in Escherichia coli AB - The Are two-component system, comprising the ArcB sensor kinase and the ArcA response regulator, modulates the expression of numerous genes in response to the respiratory growth conditions. Under anoxic growth conditions ArcB autophosphorylates and transphosphorylates ArcA, which in turn represses or activates its target operons. The anaerobic metabolite D-lactate has been shown to stimulate the in vitro auto-phosphorylating activity of ArcB. In this study, the in vivo effect Of D-lactate on the kinase activity of ArcB was assessed. The results demonstrate that D-lactate does not act as a direct signal for activation of ArcB, as previously proposed, but acts as a physiologically significant effector that amplifies ArcB kinase activity MH - Mexico|Distrito Federal MH - South Korea PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000220363200020 L2 - SIGNAL-TRANSDUCTION SYSTEM; 2-COMPONENT SYSTEM; ANAEROBIC REPRESSION; REGULATOR PROTEIN; AEROBIC PATHWAYS; IN-VITRO; PHOSPHORELAY; GENE; PHOSPHORYLATION; DEHYDROGENASE SO - Journal of Bacteriology 2004 ;186(7):2085-2090 12262 UI - 3940 AU - Rodriguez H AU - Gonzalez T AU - Goire I AU - Bashan Y AD - Ctr Biol Res NW CIB, Environm Microbiol Grp, La PAz 23000, Baja Calif Sur, MexicoCuban Res Inst Sugarcane Prod ICIDCA, Havana, CubaBashan, Y, Ctr Biol Res NW CIB, Environm Microbiol Grp, AP 128, La PAz 23000, Baja Calif Sur, Mexico TI - Gluconic acid production and phosphate solubilization by the plant growth-promoting bacterium Azospirillum spp AB - In vitro gluconic acid formation and phosphate solubilization from sparingly soluble phosphorus sources by two strains of the plant growth-promoting bacteria A. brasilense (Cd and 8-I) and one strain of A. lipoferum JA4 were studied. Strains of A. brasilense were capable of producing gluconic acid when grown in sparingly soluble calcium phosphate medium when their usual fructose carbon source is amended with glucose. At the same time, there is a reduction in pH of the medium and release of soluble phosphate. To a greater extent, gluconic acid production and pH reduction were observed for A. lipoferum JA4. For the three strains, clearing halos were detected on solid medium plates with calcium phosphate. This is the first report of in vitro gluconic acid production and direct phosphate solubilization by A. brasilense and the first report of P solubilization by A. lipoferum. This adds to the very broad spectrum of plant growth-promoting abilities of this genus MH - Cuba MH - Mexico|Baja California Sur PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 5 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-1042 UR - ISI:000224999500007 L2 - INTACT WHEAT ROOTS; BRASILENSE CD; PROTON EFFLUX; RHIZOSPHERE; FRUCTOSE; STRAINS SO - Naturwissenschaften 2004 ;91(11):552-555 12263 UI - 4043 AU - Rodriguez JC AU - Duchemin B AU - Hadria R AU - Watts C AU - Garatuza J AU - Chehbouni A AU - Khabba S AU - Boulet G AU - Palacios E AU - Lahrouni A AD - IMADES, Hermosillo, Sonora, MexicoCESBIO, Toulouse, FranceFSSM, Marrakech, MoroccoITSON, Obregon, MexicoCOLPOS, Montecillo, MexicoRodriguez, JC, IMADES, Hermosillo, Sonora, Mexico TI - Wheat yield estimation using remote sensing and the STICS model in the semiarid Yaqui valley, Mexico AB - During the 1999/2000 agricultural seasons, an experiment was carried out on winter wheat fields in the semiarid Yaqui Valley (Northwest Mexico). This data set was used to calibrate the evolution of the leaf area index (LAI) simulated by STICS, which was found to be in excellent agreement with estimates obtained from field reflectance measurements. After calibration, STICS was able to simulate satisfactorily the seasonal levels and trends observed in net radiation, soil moisture and evapotranspiration, but the crop temperature was overestimated by about 2.5degreesC. On a larger scale, STICS was run on 16 fields with contrasting management practices. The simulations indicate that yield predictability is significantly lower for later sowing dates, consistent with observations. The seasonal variations of field and satellite data (Landsat-ETM+, Terra-MODIS and VEGETATION) NDVI were very close. However, some difficulties were noted: saturation of NDVI at high LAI values and smoothed variability on a 1-km spatial scale, as well as the need for a sound methodology for processing satellite data MH - France MH - Mexico|Estado De Mexico MH - Mexico|Sonora MH - Morocco PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0249-5627 UR - ISI:000224847100002 L2 - crop model;STICS;calibration;winter wheat;LAI;reflectance;NDVI;remote sensing;LEAF-AREA INDEX; VEGETATION INDEXES; NITROGEN BALANCES; GENERIC MODEL; MODIS; EVAPORATION; REFLECTANCE; CROPS; TEMPERATURE; SIMULATION SO - Agronomie 2004 ;24(6-7):295-304 12264 UI - 6547 AU - Rodriguez JL AU - Baudin C AU - Pena P AD - CSIC, Inst Ceram & Vidrio, E-28049 Madrid, SpainIPN, CINVESTAV, Saltillo 25000, Coahuila, MexicoPena, P, CSIC, Inst Ceram & Vidrio, Camino de Valdelatas S-N, E-28049 Madrid, Spain TI - Relationships between phase constitution and mechanical behaviour in MgO-CaZrO3-calcium silicate materials AB - Two MgO-CaZrO3 based three component materials, dense (> 97% of theoretical) and fine grained (approximate to 1-4 mum) were obtained by reaction sintering of MgCa(CO3)(2)/ZrSiO4 mixtures. The materials differentiated in the ternary phase, beta-Ca2SiO4 or Ca3Mg(SiO4)(2), according to the stoichiometry of the starting mixture. The reaction sintering process is studied in terms of density, microstructure and phase constitution. The thermal expansion and mechanical behaviour (Young's modulus, toughness and strength) of the obtained composites is described and correlated to the microstructure and the thermal expansion mismatch of the constituent phases. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Coahuila MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000187727500008 L2 - mechanical properties;MgO-CaZrO3 composites;microstructure;silicates;ZIRCON-DOLOMITE MIXTURES; DICALCIUM SILICATE; MICROSTRUCTURE; DECOMPOSITION; COMPOSITES SO - Journal of the European Ceramic Society 2004 ;24(4):669-679 12265 UI - 4249 AU - Rodriguez OM AU - Martinez AI AU - Favela J AU - Vizcaino A AU - Piattini M AD - Univ Castilla La Mancha, Alarcos Res Grp, Escuela Super Informat, E-13071 Ciudad Real, Spain. CICESE, Dept Comp Sci, Mexico City, DF, Mexico TI - Understanding and supporting knowledge flows in a community of software developers AB - Knowledge sharing is a collective process where the people involved collaborate with others in order to learn from them. This effort creates communities where each member cooperates by sharing knowledge about a common domain. An example of these kinds of communities is software maintenance groups, where their members must collaborate with others, and share their knowledge and experience in order to complete their assignments. This paper presents a study carried out in two software maintenance groups to understand how the knowledge flows through these groups, that is, how their members share their knowledge when they perform their activities. The approach used to model the flows of knowledge and to identify the problems that affect that flow are described, as well as the main problems detected, and how we are trying to solve them with an agent-based knowledge management system MH - Mexico|Distrito Federal MH - Spain T3 - GROUPWARE: DESIGNLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleorodrigu@cicese.mx martinea@cicese.mx favela@cicese.mx Aurora.Vizcaino@uclm.es Mario.Piattini@uclm.es0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAX05 AV - English IS - 0302-9743 UR - ISI:000224023500006 SO - 2004 ;():52-66 12266 UI - 4082 AU - Rodriguez SA AU - Kharitonov V AU - Dion JM AU - Dugard L AD - UJF, ENSIEG, CNRS, UMR 5528,INPG,Lab Automat Grenoble, F-38042 St Martin Dheres, FranceCINVESTAV, IPN, Dept Automat Control, Mexico City, DF, MexicoDugard, L, UJF, ENSIEG, CNRS, UMR 5528,INPG,Lab Automat Grenoble, BP 46, F-38042 St Martin Dheres, France TI - Robust stability of neutral systems: a Lyapunov-Krasovskii constructive approach AB - In this paper, robust stability of uncertain linear neutral systems is analysed via a Lyapunov-Krasovskii constructive approach. This paper is the first attempt to compute the Lyapunov-Krasovskii functional for a given time derivative functional w((.)) for the class of linear neutral type time delay systems. Copyright (C) 2004 John Wiley Sons, Ltd MH - France MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Engineering, Electrical & Electronic;Mathematics, Applied U5 - J;Article AV - English IS - 1049-8923 UR - ISI:000224657900003 L2 - time-delay;neutral systems;stability;robustness;Lyapunov-Krasovskii functionals SO - International Journal of Robust and Nonlinear Control 2004 ;14(16):1345-1358 12267 UI - 3650 AU - Rodriguez SM AU - Galvez JNB AU - Gasca CAE AD - CIEMAT, Plataforma Solar Almeria, Almeria 04200, SpainUniv Nacl Autonoma Mexico, Ctr Invest Energia, Morelos 62580, MexicoRodriguez, SM, CIEMAT, Plataforma Solar Almeria, Ctra Senes Km 4, Almeria 04200, Spain TI - Photocatalysis MH - Mexico|Morelos MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Energy & Fuels U5 - J;Editorial Material AV - English IS - 0038-092X UR - ISI:000225694200001 SO - Solar Energy 2004 ;77(5):443-444 12268 UI - 6384 AU - Rodriguez T AU - Altieri A AU - Chatenoud L AU - Gallus S AU - Bosetti C AU - Negri E AU - Franceschi S AU - Levi F AU - Talamini R AU - La Vecchia C AD - Ist Ric Farmacol Mario Negri, I-20157 Milan, ItalyUniv Publ Navarra, Dept Ciencias Salud, Pamplona 31008, SpainUniv Autonoma San Luis Potosi, Fac Med, San Luis Potosi 78210, MexicoInt Agcy Res Canc, F-69732 Lyon, FranceCHUV Falaises 1, Inst Univ Med Sociale & Prevent, Registre Vaudois Tumeurs, CH-1011 Lausanne, SwitzerlandCtr Riferimento Oncol, Serv Epidemiol, I-33081 Aviano, PN, ItalyUniv Milan, Ist Stat Med & Biometria, I-20133 Milan, ItalyAltieri, A, Ist Ric Farmacol Mario Negri, Via Eritrea 62, I-20157 Milan, Italy TI - Risk factors for oral and pharyngeal cancer in young adults AB - Mortality from oral cancer has been rising in the young in several areas of the world until the early 1990s. We analysed data from two case-control studies from Italy and Switzerland including 137 cases of oral and pharyngeal cancer below age 46 and 298 hospital controls. The multivariate odds ratios (OR) were 20.7 for heavy smokers and 4.9 for heavy drinkers. The combination of high tobacco and alcohol consumption led to an OR of over 48. Body mass index (OR=0.28, for the highest tertile), high consumption of coffee (OR=0.25), fresh vegetables (011=039), fruit (OR=0.73) and beta-carotene (OR=0.48) were inversely related to risk. Tobacco accounted for 77% of all cancer cases in this population, alcohol for 52%, low vegetable consumption for 52%, and the combination of the three factors for 85%. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Italy MH - Mexico|San Luis Potosi MH - Spain MH - Switzerland PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 14 U4 - Oncology;Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1368-8375 UR - ISI:000188399100014 L2 - oral cancer;pharyngeal cancer;alcohol drinking;tobacco;risk factors;case-control studies;SQUAMOUS-CELL CARCINOMA; ATTRIBUTABLE RISK; DIGESTIVE-TRACT; DIETARY FACTORS; ALCOHOL; CAVITY; TOBACCO; SMOKING; EPIDEMIOLOGY; CONSUMPTION SO - Oral Oncology 2004 ;40(2):207-213 12269 UI - 6406 AU - Rogan J AU - Ramirez R AU - Romero AH AU - Kiwi M AD - Univ Chile, Fac Ciencias, Dept Fis, Santiago 1, ChileCatholic Univ Chile, Fac Fis, Santiago 6904411, ChileIPICyT, Adv Mat Dept, San Luis Potosi 78231, MexicoRogan, J, Univ Chile, Fac Ciencias, Dept Fis, Casilla 653, Santiago 1, Chile TI - Rearrangement collisions between gold clusters AB - Collision processes between two gold clusters are investigated using classical molecular dynamics in combination with embedded atom (EA) potentials, after checking the reliability of the EA results by contrasting them with first principles calculations. The Au projectiles considered are both single atoms (N = 1) and clusters of N = 2, 12, 13 and 14 atoms. The targets contain N = 12, 13 and 14 gold atoms. The collision energy E and impact parameter b are chosen within a range such that the three regimes we are interested in studying (fusion, scattering and fragmentation) are realized. The results of the collision processes are described and analyzed in detail, and compared with previous work MH - Chile MH - Mexico|San Luis Potosi PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 13 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1434-6060 UR - ISI:000188388300009 L2 - MOLECULAR-DYNAMICS SIMULATIONS; COINAGE-METAL-CLUSTERS; EMBEDDED-ATOM-METHOD; POTENTIAL-ENERGY; AU-N; FUSION; SURFACES; SPECTRA; CU; FRAGMENTATION SO - European Physical Journal D 2004 ;28(2):219-228 12270 UI - 6197 AU - Rogero C AU - Koitzsch C AU - Gonzalez ME AU - Aebi P AU - Cerda J AU - Martin-Gago JA AD - CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, SpainUniv Neuchatel, Inst Phys, CH-2000 Neuchatel, SwitzerlandUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoRogero, C, CSIC, Inst Ciencia Mat Madrid, Cantoblanco, E-28049 Madrid, Spain TI - Electronic structure and Fermi surface of two-dimensional rare-earth silicides epitaxially grown on Si(111) AB - The electronic structure and the Fermi surface of two-dimensional rare-earth silicides epitaxially grown on Si(111), YSi2 and GdSi2, have been studied by a combination of angle-resolved ultraviolet photoemission spectroscopy and density functional theory calculations. Both silicides present a very similar electronic structure, with two characteristic electronic bands below the Fermi energy. One crosses the Fermi energy near the Gamma point of the surface Brillouin zone (hole pocket) and the other one close to the (M) over bar point (electron pocket). These two bands arise from surface (localized) states and are responsible for all the Fermi surface features. The theoretical calculations are in good qualitative agreement with the experimental results, and also allow to examine the nature of the bonding between the rare earth and the neighboring silicon atoms. We have found a combination of sp metallic type bond together with covalent bonds involving the rare-earth d states and Si 3p states MH - Mexico|Baja California MH - Spain MH - Switzerland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000189075200057 L2 - ENERGY ION-SCATTERING; PHOTOELECTRON-DIFFRACTION DATA; SCANNING-TUNNELING-MICROSCOPY; ANGLE-RESOLVED PHOTOEMISSION; AB-INITIO CALCULATIONS; ER SILICIDE; DYSPROSIUM GERMANIDE; ATOMIC-STRUCTURE; PSEUDOPOTENTIALS; SYSTEMS SO - Physical Review B 2004 ;69(4): 12271 UI - 5824 AU - Rohani P AU - Miramontes O AU - Keeling MJ AD - Univ Georgia, Inst Ecol, Athens, GA 30602, USAUniv Nacl Autonoma Mexico, Inst Fis, Dept Sistemas Complejos, Mexico City 01000, DF, MexicoUniv Warwick, Dept Biol Sci, Ecol & Epidemiol Grp, Coventry CV4 7AL, W Midlands, EnglandRohani, P, Univ Georgia, Inst Ecol, Athens, GA 30602, USA TI - The colour of noise in short ecological time series data AB - ne statistical properties of ecological time series data and general trends therein have historically been of great interest to ecologists. In recent years, there has been a focus on establishing the relative importance of 'memory' in these data. The classic study by Pimm & Redfearn (1988 Nature, 334, 613-614) has been extremely important in establishing within the ecological community the idea that population time series are generally 'red-shifted' (dominated by long-term trends). This conclusion was reached by exploring the relationship between observed variability and census length in ecological data and comparing them with those for artificially generated data. Here, we highlight some subtle problems with this approach and suggest possible alternative methods of analysis, especially when the time series of interest are short MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 4 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0265-0746 UR - ISI:000220664400004 L2 - population dynamics;time-series data;power spectra;pink noise;white noise;POPULATION-DYNAMICS; ANIMAL POPULATIONS; 1/F NOISE; VARIABILITY; SPECTRA; MODELS; PATTERNS; WHITE; RISK; BLUE SO - Mathematical Medicine and Biology-A Journal of the Ima 2004 ;21(1):63-72 12272 UI - 4680 AU - Rojas-Ochoa LF AU - Mendez-Alcaraz JM AU - Saenz JJ AU - Schurtenberger P AU - Scheffold F AD - Univ Fribourg, Dept Phys, CH-1700 Fribourg, SwitzerlandIPN, CINVESTAV, Dept Fis, Mexico City 07300, DF, MexicoUniv Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, SpainUniv Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, SpainScheffold, F, Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland TI - Photonic properties of strongly correlated colloidal liquids AB - The optical and structural properties of dense colloidal suspensions in the presence of long-range electrostatic repulsion are determined from both light and small-angle neutron scattering experiments. Short-range structural order induces an enhancement of the scattering strength while at the same time the total transmission shows strong wavelength dependence, reminiscent of a photonic crystal. Interestingly, the interplay between diffusive scattering and local order leads to negative values of the scattering anisotropy parameter. The tunable optical properties of these liquids furthermore suggest potential applications such as transparency switches or filters MH - Mexico|Distrito Federal MH - Spain MH - Switzerland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000223273300024 L2 - LOCALIZATION; LIGHT; SUSPENSIONS; DIFFUSION; SCATTERING; METALS SO - Physical Review Letters 2004 ;93(7): 12273 UI - 5886 AU - Rojas F AU - Cota E AU - Ulloa SE AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Dept Theoret Phys, Ensenada 22800, Baja California, MexicoOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701, USARojas, F, Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Dept Theoret Phys, Ensenada 22800, Baja California, Mexico TI - Magnetic field and dissipation effects on the charge polarization in quantum cellular automata AB - We study the dynamic evolution of the charge distribution (polarization) of a 2 x 2 quantum-dot cell with two electrons in the presence of a time-dependent driver cell and a magnetic field. We describe the effects of the magnetic flux on the response of the basic dot cell, for fixed, and linear switching of the driver polarization. In the static case, we find that the magnetic field has a strong localizing effect, similar to the effect of asymmetry. For fixed tunneling, the polarization of the target cell increases with magnetic field, going through a maximum at a particular value of the magnetic flux through the cell. In the dynamic case, a ringing effect and a decrease in the final polarization value of the target cell are obtained as the magnetic field increases. The effects of temperature and asymmetry on these results are also analyzed MH - Mexico|Baja California MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 1536-125X UR - ISI:000220457800007 L2 - quantum cellular automata (QCA);quantum computation;quantum dots (QDs);DOT CELLS; COMPUTATION SO - Ieee Transactions on Nanotechnology 2004 ;3(1):37-41 12274 UI - 5593 AU - Rojas P AU - Rojas C AU - Ebadi M AU - Montes S AU - Monroy-Noyola A AU - Serrano-Garcia N AD - Inst Nacl Neurol & Neurocirug, Lab Neurotoxicol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Dept Physiol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv N Dakota, Sch Med & Hlth Sci, Dept Pharmacol, Grand Forks, ND 58201, USAInst Nacl Neurol & Neurocirug, Dept Neurochem, Mexico City, DF, MexicoUniv Autonoma Estado Morelos, Fac Pharm, Cuernavaca, Morelos, MexicoRojas, P, Inst Nacl Neurol & Neurocirug, Lab Neurotoxicol, Mexico City, DF, Mexico TI - EGb761 pretreatment reduces monoamine oxidase activity in mouse corpus striatum during 1-methyl-4-phenylpyridinium neurotoxicity AB - EGb761 produces reversible inhibition of both monoamine oxidase (MAO) isoforms in the central nervous system. 1-methyl-4-phenylpyridinium (MPP+) neurotoxicity is prevented by treatment with the MAO inhibitor pargyline. We investigated EGb761's effect on striatal MAO activity during MPP+ neurotoxicity. C-57 black mice were pretreated with EGb761 (10 mg/kg) daily for 17 days followed by administration of MPP+ (0.72 mg/kg). MPP+ enhanced striatal MAO (30%) activity at 6 h, and EGb761 prevented this effect. MAO-B activity in striatum was enhanced (70%) 6 h after MPP+ administration and was reduced to almost normal levels in EGb761 + MPP+ group compared to MPP+ group. Pretreatment with EGb761 partially prevented (32%) the striatal dopamine-depleting effect of MPP+ and prevented the reduction in striatal tyrosine hydroxylase activity (100%). Results suggest that EGb761 supplements may be effective in reducing MAO activity as well as enhancement in dopamine metabolism, thereby preventing MPP+-neurotoxicity MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0364-3190 UR - ISI:000221207600013 L2 - EGb761;1-methyl-4-phenylpyridinium ion;monoamine oxidase activity;monoamine oxidase-B;neuroprotection;Parkinson's disease;GINKGO-BILOBA EXTRACT; PARKINSONS-DISEASE; DOPAMINERGIC NEUROTOXICITY; TYROSINE-HYDROXYLASE; LIPID-PEROXIDATION; MITOCHONDRIAL-DNA; OXIDATIVE STRESS; 1-METHYL-4-PHENYL-1,2,3,6-TETRAHYDROPYRIDINE; MPTP; TOXICITY SO - Neurochemical Research 2004 ;29(7):1417-1423 12275 UI - 5099 AU - Roma F AU - Stacchiola D AU - Tysoe WT AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Wisconsin, Dept Chem, Milwaukee, WI 53201, USAUniv Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, San Luis, ArgentinaZgrablich, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico TI - Lattice-gas modeling of enantioselective adsorption by template chiral substrates AB - The general behavior of enantioselective adsorption by templated chiral substrates is studied in the framework of lattice-gas and random sequential adsorption theories. The template is assumed to be formed by randomly preadsorbing a chiral species A on a square lattice of sites. A second chiral probe species, B, thus performs a random sequential adsorption process on the templated substrate and the enantioselectivity of the process with respect to one of the B enantiomers is obtained as a function of the relevant parameters of the model. All species considered in the present study are considered as monomers, i.e., they occupy a single adsorption site. In an extension of the simple model, the possibility that the chiral probe species can themselves act as templates is taken into account. It is shown how different arrangements of A molecules on the surface generate different enantioselectivities as a function of coverage, some of which have been observed experimentally. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0378-4371 UR - ISI:000222286500017 L2 - chiral catalysis;enantioselectivity;adsorption;COOPERATIVE SEQUENTIAL ADSORPTION; ALPHA-KETO ESTERS; TARTARIC ACID; HYDROGENATION; CATALYSTS; SURFACE; CHEMISORPTION; CINCHONIDINE; KETOESTERS; GEOMETRY SO - Physica A-Statistical Mechanics and Its Applications 2004 ;338(3-4):493-510 12276 UI - 5688 AU - Romero-Bastida CA AU - Flores-Huicochea E AU - Martin-Polo MO AU - Velazquez G AU - Torres JA AD - Oregon State Univ, Corvallis, OR 97331, USACtr Desarrollo Productos Biot, Dept Desarrollo Tecnol, Yautepec, Morelos, MexicoUniv Autonoma Queretaro, Dept Invest & Posgrado, Queretaro, MexicoUniv Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Reynosa 88700, Tamaulipas, MexicoTorres, JA, Oregon State Univ, Corvallis, OR 97331, USA TI - Compositional and moisture content effects on the biodegradability of zein/ethylcellulose films AB - The effect of moisture content and film composition on biodegradability is the focus of this study. Flexible films were first characterized for the effect on water sorption isotherms of relative humidity, temperature, zein content, and the addition of the plasticizers stearic acid, poly(ethylene glycol), or etoxylated ricine oil. Zein/ethylcellulose (EC) mixture films had a behavior between that for pure zein and EC films, which had the lowest water sorption. For films with plasticizer, the lowest water sorption at 25 degreesC was observed for those with stearic acid. Biodegradability of zein/EC films, evaluated using bacterial cultures selected for their zein proteolytic activity and isolated from a local solid waste landfill and a lagoon, showed no plasticizer effect even though its effect on moisture content was significant. Large differences were observed at different film zein concentration with the highest biodegradability for 100% zein. However, biodegradability did not mimic the water sorption behavior of zein/EC mixture films MH - Mexico|Morelos MH - Mexico|Queretaro MH - Mexico|Tamaulipas MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000220874900016 L2 - moisture sorption isotherms;ethylcellulose;zein;plasticizer;biodegradability;POTASSIUM SORBATE PERMEABILITY; SORPTION ISOTHERMS; BARRIER PROPERTIES; EDIBLE FILMS; ZEIN FILMS; WATER; METHYLCELLULOSE; FOODS; TEMPERATURE; PROTEIN SO - Journal of Agricultural and Food Chemistry 2004 ;52(8):2230-2235 12277 UI - 2807 AU - Romero-Melendez C AU - Gauthier JP AU - Monroy-Perez F AD - Univ Bourgogne, Dept Math, Lab Anal Appl & Optimisat, F-21078 Dijon, FranceUniv Bourgogne, CNRS, UMR 5158, Lab LE2I,Dept Math, F-21078 Dijon, FranceUniv Autonoma Metropolitana Azcapotzalco, Dept Basic Sci, Mexico City 02200, DF, MexicoRomero-Melendez, C, Univ Bourgogne, Dept Math, Lab Anal Appl & Optimisat, F-21078 Dijon, France TI - On complexity and motion planning for co-rank one sub-Riemannian metrics AB - In this paper, we study the motion planning problem for generic sub-Riemannian metrics of co-rank one. We give explicit expressions for the metric complexity (in the sense of Jean [10, 11]), in terms of the elementary invariants of the problem. We construct asymptotic optimal syntheses. It turns out that among the results we show, the most complicated case is the 3-dimensional. Besides the generic C-infinity case, we study some non-generic generalizations in the analytic case MH - France MH - Mexico|Distrito Federal PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Automation & Control Systems;Mathematics, Applied U5 - J;Article AV - English IS - 1262-3377 UR - ISI:000227631200011 L2 - motion planning problem;metric complexity;normal forms;asymptotic optimal synthesis;GEOMETRY SO - Esaim-Control Optimisation and Calculus of Variations 2004 ;10(4):634-655 12278 UI - 6459 AU - Romero-Steiner S AU - Spear W AU - Brown N AU - Holder P AU - Hennessy T AU - de Leon PG AU - Carlone GM AD - Ctr Dis Control & Prevent, Div Bacterial & Mycot Dis, Resp Dis Branch, Resp Dis Immunol Sect, Atlanta, GA 30333, USACtr Dis Control & Prevent, Arct Invest Program, Anchorage, AK, USAUniv Nacl Autonoma Mexico, Sch Med, Mexico City 04510, DF, MexicoRomero-Steiner, S, Ctr Dis Control & Prevent, Div Bacterial & Mycot Dis, Resp Dis Branch, Resp Dis Immunol Sect, MS A-36,1600 Clifton Rd, Atlanta, GA 30333 USA TI - Measurement of serum bactericidal activity specific for Haemophilus influenzae type b by using a chromogenic and fluorescent metabolic indicator AB - We evaluated alamarBlue as a metabolic indicator in a standardized assay for the measurement of serum bactericidal activity (SBA) to Haemophilus influenzae type b (Hib) using sera containing natural and vaccine-induced anticapsular (polyribosylribitol phosphate) antibodies. SBA assays with a colorimetric and a fluorometric end point in the presence of alamarBlue were developed and compared to a standard SBA assay, where colony counts are performed to determine the titer (12). A colorimetric end point required a spectrophotometer, whereas a fluorometric end point required a fluorometer. Prevaccination sera (n = 27) and postvaccination sera (n = 13) were tested by all three methodologies, and the SBA titers obtained in the presence of alamarBlue were compared to those from the standard method. Both the colorimetric and the fluorometric SBA titers were significantly correlated (r = 0.87 and r = 0.95, respectively) with those of the standard assay (greater than or equal to50% killing as the SBA titer end point), and titers were not significantly different when compared to those of the standard assay (P > 0.68). However, the fluorometric end point had superior performance and ease of titer determination compared to the colorimetric end point (95 versus 87% of SBA titers were within 2 dilutions of the standard titer). Hib SBA assays with alamarBlue are reproducible, faster (same-day assay), and easier to perform than the standardized assay, which requires manual or automated colony counts. These semiautomated methodologies result in increased sample throughput and collection of data in digital formats that can be exported to data analysis programs for determination of SBA titers MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 5 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 1071-412X UR - ISI:000188201400014 L2 - ASSAY SO - Clinical and Diagnostic Laboratory Immunology 2004 ;11(1):89-93 12279 UI - 4895 AU - Romero AH AU - Jeschke HO AU - Rubio A AU - Garcia ME AD - Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, GermanyIPICyT, Adv Mat Dept, San Luis Potosi 78216, SLP, MexicoRutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854, USAUniv Pais Vasco, Fac Quim, Dept Fis Mat, CSIC,EHU, San Sebastian 20018, Donostia, SpainDonostia Int Phys Ctr, San Sebastian 20018, Donostia, SpainUniv Illes Balears, Dept Fis, E-07071 Palma de Mallorca, SpainGarcia, ME, Free Univ Berlin, Inst Theoret Phys, Arnimallee 14, D-14195 Berlin, Germany TI - Atomistic simulation of the laser induced damage in single wall carbon nanotubes: Diameter and chirality dependence AB - The effect of high energy laser pulses on single wall carbon nanotubes (SWNT) is studied by a non-equilibrium quantum mechanical model. For the studied laser parameters, we find ablation thresholds that vary between 1.9 eV/atom and 2.3 eV/atom. For zigzag tubes a linear increase of damage thresholds as function of diameter is observed. For armchair tubes, a stability maximum is found at the (10,10) SWNT. We find that below but close to the damage threshold the nanotubes show the presence of standing waves MH - Germany MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000222766100044 SO - Applied Physics A-Materials Science & Processing 2004 ;79(4-6):899-901 12280 UI - 5326 AU - Romero AH AU - Lacasta AM AU - Sancho JM AD - IPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoUniv Politecn Catalunya, Dept Fis Aplicada, E-08028 Barcelona, SpainUniv Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, SpainRomero, AH, IPICyT, Adv Mat Dept, Codigo Postal 78216, San Luis Potosi 78216, Mexico TI - Modelization of surface diffusion of a molecular dimer AB - A simple model for a dimer molecular diffusion on a crystalline surface, as a function of temperature, is presented. The dimer is formed by two particles coupled by a quadratic potential. The dimer diffusion is modeled by an overdamped Langevin equation in the presence of a two-dimensional periodic potential. Numerical simulation's results exhibit some dynamical properties observed, for example, in Si-2 diffusion on a silicon [100] surface. They can be used to predict the value of the effective friction parameter. Comparison between our model and experimental measurements is presented MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000221813100010 L2 - SCANNING-TUNNELING-MICROSCOPY; SI AD-DIMERS; SI(100) SURFACE; SILICON DIMER; SI(001) SO - Physical Review e 2004 ;69(5): 12281 UI - 5559 AU - Romero AH AU - Sbraccia C AU - Silvestrelli PL AD - IPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoINFM, Udr Padova, Trieste, ItalyDEMOCRITOS Natl Simulat Ctr, Trieste, ItalyUniv Padua, Dipartimento Fis G Galilei, I-35131 Padua, ItalySISSA, I-34014 Trieste, ItalyRomero, AH, IPICyT, Adv Mat Dept, Camino Presa San Jose 2055, San Luis Potosi 78216, Mexico TI - Adsorption of 3-pyrroline on Si(100) from first principles AB - The chemisorption of 3-pyrroline (C4H7N) on Si(100) is studied from first principles. Three different structures can be realized for which, depending on the temperature, the chemisorption process is facile (for two of them it is essentially barrierless); among these configurations the most favored one, from a thermodynamical point of view, is a dissociated structure obtained through an exothermic reaction characterized by the formation of a N-Si bond and a H-Si bond in which the H atom is detached from the molecule. Several other chemisorption structures are possible which, however, require overcoming a significant energy barrier and often breaking multiple bonds. A number of reaction paths going from one stable structure to another have been investigated. We have also generated, for the two basic adsorption structures, theoretical scanning tunneling microscopy images which could facilitate the interpretation of experimental measurements, and we propose a possible reaction mechanism for nitrogen incorporation. (C) 2004 American Institute of Physics MH - Italy MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000221268300038 L2 - DENSITY-FUNCTIONAL THEORY; SEMICONDUCTOR SURFACES; ORGANIC-MOLECULES; SI(001) SURFACE; NH3; APPROXIMATION; DECOMPOSITION; CHEMISORPTION; ACETYLENE; NITROGEN SO - Journal of Chemical Physics 2004 ;120(20):9745-9751 12282 UI - 3245 AU - Romero J AU - Johnson CD AD - Colegio Postgrad, CEIFIT, Programa Entomol & Acarol, Montecillo, Estado Mexico, MexicoNo Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011, USARomero, J, Colegio Postgrad, CEIFIT, Programa Entomol & Acarol, Montecillo, Estado Mexico, Mexico TI - Checklist of the Bruchidae (Insecta : Coleoptera) of Mexico AB - Johnson and Kingsolver (1981) estimated that there were 140 species of Bruchidae in Mexico. We now know that there are at least 334 species in 23 genera of Bruchidae in Mexico. This increase is due to research that has produced new distribution records and new species. In the checklist the species are listed by genus and distribution records are given for each species. Brief histories on the work of researchers in the New World and estimates of numbers species of bruchids in the New World and worldwide are given. Four names are excluded from a checklist of bruchids of the New World for a variety of reasons. Bruchus ingae Fahraeus (1839) has only been found in southern South America and the original designation from Mexico is considered to be in error. Bruchus serraticornis (Fabricius) was published by Fabricius (1775) on page 65 with a locality as "Habitat in Oriente." Blackwelder (1946) indicated that serraticornis was published by Fabricius (1775) on page 66 (erroneously) and was from "Mexico, Old World." In several recent papers European entomologists (Decelle and Lodos 1989; Borowiec and Anton 1993; Anton et al. 1997) indicated that serraticornis (Fabricius) was in the Old World genus Bruchidius. The name is therefore excluded. Bruchus triangularis Say (1831:1) and B. oculatus Say (1831:2), both from Mexico, were among the species described by Say (1831) whose types were apparently lost. These names cannot be applied to any species with any degree of certainty because of inadequate descriptions by Say. They continue to appear on checklists but not in the literature, so after 170+ years we consider them to be nomina dubia and therefore they were removed from the checklist MH - Mexico|Estado De Mexico MH - USA PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Review AV - English IS - 0010-065X UR - ISI:000226769200018 L2 - NORTH-AMERICA; HOST RECORDS; NEW-WORLD; GENUS; ACANTHOSCELIDES; ZABROTES; AMBLYCERINAE; REVISION; BRIDWELL SO - Coleopterists Bulletin 2004 ;58(4):613-635 12283 UI - 4031 AU - Romero J AU - Johnson CD AD - Colegio Postgrad, Inst Fitosanidad, Programa Entomol & Acarol, Montecillo 5630, Estado De Mexic, MexicoNo Arizona Univ, Dept Sci Biol, Flagstaff, AZ 86011, USARomero, J, Colegio Postgrad, Inst Fitosanidad, Programa Entomol & Acarol, Montecillo 5630, Estado De Mexic, Mexico TI - Zabrotes maesi, a new species from Nicaragua with new distribution records for other Bruchids (Coleoptera : Bruchidae : Aniblycerinae) AB - The new species Zabrotes maesi is described from Granada, Nicaragua. Zabrotes maesi is closely related to Z. subfasciatus (Boheman) and Z. sylvestris Romero and Johnson. The external surfaces and male genitalia are illustrated for Z. maesi and compared with the other two species. Seventeen other species of Bruchidae not reported from Nicaragua are listed along with their known hosts MH - Mexico|Estado De Mexico MH - USA PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000224730200015 L2 - SOUTH-AMERICA; INSECTICIDAL ACTIVITY; MEXICO COLEOPTERA; HOST RECORDS; GENUS; AMBLYCERINAE; GUILDS SO - Coleopterists Bulletin 2004 ;58(3):379-387 12284 UI - 4883 AU - Romero J AU - Johnson CD AD - Colegio Postgrad, Inst Fitosanidad, Programa Entomol & Acarol, Montecillo 5630, MexicoNo Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011, USARomero, J, Colegio Postgrad, Inst Fitosanidad, Programa Entomol & Acarol, Montecillo 5630, Mexico TI - Stator Huautlae, a new species from Mexico feeding in fruits of sage (Lamiaceae), a new host family from the New World for Bruchidae (Coleoptera) AB - The new species, Stator huautlae, is described. It was reared from nutlets of its host plant Salvia sessei Bentham (Lamiaceae), from Morelos, Mexico. This is the first record for the genus Stator and for a bruchid from the New World feeding in the fruits of this family. The relationships of S. huautlae to other species groups of Stator are discussed. Figures of the dorsal and lateral surfaces, the male genitalia, and eggs and exit holes of S. huautlae in the nutlets of S. sessei are included MH - Mexico|Estado De Mexico MH - USA PB - NATCHEZ: COLEOPTERISTS SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0010-065X UR - ISI:000222746400009 SO - Coleopterists Bulletin 2004 ;58(2):253-260 12285 UI - 5631 AU - Romero JA AU - Lozano A AU - Rakheja S AU - Ahmed AKW AU - Hong H AD - Mexican Transport Inst, Mexico City, DF, MexicoQueretaro Autonomous Univ, Mexico City, DF, MexicoConcordia Univ, Concave Res Ctr, Dept Mech Engn, Montreal, PQ H3G 1M8, CanadaRomero, JA, Mexican Transport Inst, Mexico City, DF, Mexico TI - Restrained cargo dynamics in road transportation: direct tiedowns AB - A model is proposed to study the dynamic response and effectiveness of direct tiedowns under longitudinal decelerations. Two independent legs of the securing tiedowns are considered in the model, and tiedown elasticity is represented by an equivalent longitudinal stiffness as a function of the material, tiedown angle and geometry, assuming negligible initial tension. The contribution due to initial tension and variations in the orientation of tiedowns are incorporated in the model as external forces acting on the secured cargo. The cargo-deck friction force is further derived assuming ideal properties on the basis of resultant normal loads under the influence of vertical trailer vibration. A nonlinear single degree-of-freedom model of the restrained cargo is developed and analysed to study the cargo displacement responses as functions of initial tension, orientation of the tiedown, tiedown material, cargo-deck friction, nature of trailer vibration and magnitudes of constant deceleration. The results of the study revealed nearly linear cargo displacement response with the magnitudes of deceleration and vertical vibration. The cargo displacement response varies considerably with the tiedown angles, and cargo-deck friction coefficient in a nonlinear manner. The effective resistance of the restraints is further dependent upon the vertical vibration frequency and natural frequency of the tiedown system. Tiedown angles exceeding 45degrees yield considerably larger cargo displacement, specifically under trailer vibration MH - Canada MH - Mexico|Distrito Federal PB - GENEVA: INDERSCIENCE ENTERPRISES LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Mechanical;Transportation Science & Technology U5 - J;Article AV - English IS - 1351-7848 UR - ISI:000221127000001 L2 - cargo securement;road transportation;tiedown;trailer vibration SO - Heavy Vehicle Systems-International Journal of Vehicle Design 2004 ;11(2):115-132 12286 UI - 4949 AU - Romero JM AU - Villalobos JL AU - Sosa E AU - Amaya M AD - Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoAmer Petr Inst, Washington, DC 20005, USAAmaya, M, Inst Mexicano Petr, Programa Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas No 152,Col San Bartolo A, Mexico City 07730, DF, Mexico TI - Pipeline steels in the presence of treated seawater used in the oil industry AB - The electrochemical noise technique was used to evaluate the corrosion behavior of the API X52 and API X65 pipeline steels in seawater treated with several chemical products in static conditions. This treated seawater is used in the secondary recovery system of the oil industry. The static conditions were selected to evaluate the corrosion behavior of the pipelines in a shutdown period where the seawater is stagnated inside the pipelines. The long-term current noise series in both pipeline steels show more perturbations in treated seawater compared to the API pipeline steels coupons exposed in the suction seawater used as control. The electrochemical noise patterns suggest a good correlation with the micrograph evidence founded in the corroded surfaces during the corrosion of API X52 and API X65 pipeline steels. The micrograph evidence suggests that at pitting index (PI, defined as the standard deviation of the electrochemical current noise divided by root mean square of the coupling current), mean value near 1. the localized corrosion was most severe. The presence of bacterial consortia influenced the trend of the PI values at the interval from 0.0.1 to 0.1, after 35 h MH - Mexico|Distrito Federal MH - USA PB - HOUSTON: NATL ASSN CORROSION ENG RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-9312 UR - ISI:000222675000009 L2 - bacteria consortia;electrochemical noise;environmental scanning electron microscopy;microbiologically influenced corrosion;seawater SO - Corrosion 2004 ;60(7):689-696 12287 UI - 3044 AU - Romero RM AU - Ochoa-Contreras DO AU - Rivera-Sempertegui JO AU - Karogeozian H AU - Alfaro V AU - Quiroz-Mercado H AD - APEC, Mexico City, DF, MexicoSK Pharmaceut INC, San Juan Capistrano, CA, USAStorm Eye Inst, Charleston, SC 29425, USA TI - Anatomical outcome of retinal detachment surgery in children with intravitreal carbamide prior to MH - Mexico|Distrito Federal MH - USA PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Meeting Abstract AV - English IS - 0146-0404 UR - ISI:000223338201247 SO - Investigative Ophthalmology & Visual Science 2004 ;45():U359-U359 12288 UI - 3598 AU - Romieu I AU - Ramirez-Aguilar M AU - Moreno-Macias H AU - Barraza-Villarreal A AU - Miller P AU - Hernandez-Cadena L AU - Carbajal-Arroyo LA AU - Hernandez-Avila M AD - Inst Salud Publ, Cuernavaca 65708, Morelos, MexicoCommiss Environm Cooperat, Montreal, PQ, CanadaUniv Peruana Cayetano Heredia, Lima, PeruRomieu, I, Inst Salud Publ, Av Univ 655,Col Santa Ma, Cuernavaca 65708, Morelos, Mexico TI - Infant mortality and air pollution: Modifying effect by social class AB - Studies link air pollution with increased mortality; however, information on infants is scarce and inconclusive. Objective: We studied short-term PM10 exposure, relating to increased respiratory-related infant mortality, and estimated for poor living conditions. Methods: A case-crossover approach modeled the relationship between infant mortality (1 month-1 year of age), and ambient PM10 levels on days before death in Ciudad Juarez, Mexico (1997-2001). Socioeconomic level (SES) of the deceased was defined by residence location. Results: Overall air pollutants did not affect infant mortality (odds ratio [OR] = 1.02, 95% confidence interval [CI] = 0.94-1.11 for PM10, lag-1) but low SES increased risk. Each 20 mug/m(3) in PM10 (24-hour average, lag1, cumulative over 2 previous days) increased respiratory-related mortality (OR = 1.61, 95% CI = 0.97-2.66; OR = 2.56; 95% CI = 1.06-6.17, respectively). Ozone levels did not affect infant mortality for any SES. Conclusions: Worse living conditions among lower SES concurred with increased mortality MH - Canada MH - Mexico|Morelos MH - Peru PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 5 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1076-2752 UR - ISI:000225869500008 L2 - CASE-CROSSOVER ANALYSIS; TIME-SERIES; SAO-PAULO; DEATH; CHILDREN; DISEASE; BRAZIL; AGE SO - Journal of Occupational and Environmental Medicine 2004 ;46(12):1210-1216 12289 UI - 4780 AU - Romieu I AU - Lazcano-Ponce E AU - Sanchez-Zamorano LM AU - Willett W AU - Hernandez-Avila M AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoHarvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115, USAHarvard Univ, Sch Med, Boston, MA 02115, USABrigham & Womens Hosp, Dept Med, Channing Lab, Boston, MA, USARomieu, I, Inst Nacl Salud Publ, Avenida Univ 655,Colonia Santa Maria, Cuernavaca 62508, Morelos, Mexico TI - Carbohydrates and the risk of breast cancer among Mexican women AB - Objective: High carbohydrate intake has been hypothesized to be a risk factor for breast cancer, possibly mediated by elevated levels of free insulin, estrogens, and insulin-like growth factor-1. Therefore, we conducted a population-based case-control study among a Mexican population characterized by relatively low fat and high carbohydrate intakes. Methods: Women ages 20 to 75 years, identified through six hospitals in Mexico City (n = 475), were interviewed to obtain data relating to diet (using a food frequency questionnaire) and breast cancer risk factors. Controls (n = 1,391) were selected from the Mexico City population using a national sampling frame. Results: Carbohydrate intake was positively associated with breast cancer risk. Compared with women in the lowest quartile of total carbohydrate intake, the relative risk of breast cancer for women in the highest quartile was 2.22 [95% confidence interval (95% CI) 1.63-3.04], adjusting for total energy and potential confounding variables (P for trend < 0.0001). This association was present in premenopausal and postmenopausal women (for highest versus lowest quartile, odds ratio 2.31, 95% Cl 1.36-3.91 in premenopausal women and odds ratio 2.22, 95% CI 1.49-3.30 in postmenopausal women). Among carbohydrate components, the strongest associations were observed for sucrose and fructose. No association was observed with total fat intake. Discussion: In this population, a high percentage of calories from carbohydrate, but not from fat, was associated with increased breast cancer risk. This relation deserves to be investigated further, particularly in populations highly susceptible to insulin resistance MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 9 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1055-9965 UR - ISI:000223155500004 L2 - FOOD-FREQUENCY QUESTIONNAIRE; POSTMENOPAUSAL WOMEN; DIABETES-MELLITUS; GENETIC-VARIATION; GLYCEMIC INDEX; DIETARY-INTAKE; INSULIN; FAT; ASSOCIATION; METABOLISM SO - Cancer Epidemiology Biomarkers & Prevention 2004 ;13(8):1283-1289 12290 UI - 5031 AU - Romieu I AU - Mannino DM AU - Redd SC AU - McGeehin MA AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoCtr Dis Control & Prevent, Natl Ctr Environm Hlth, Atlanta, GA, USARomieu, I, Inst Nacl Salud Publ, Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Dietary intake, physical activity, body mass index, and childhood asthma in the third National Health and Nutrition Survey (NHANES III) AB - Childhood asthma may be affected by dietary changes and increased body mass related to a sedentary lifestyle, although the mechanisms are poorly understood. To test this hypothesis, we used data from the National Health and Nutrition Survey (NHANES III) from 19881994, including 7,904 children. We analyzed cross-sectional information on body mass index (BMI = weight/height), physical activity (hr/day viewing television), dietary intake (24-hr recall), and vitamin C intake (60 mg/day). The probability of self-reported asthma or wheezing relating to risk. factors was calculated by logistic regression. After controlling for dietary intake, physical activity, and sociodemographic variables, asthma risk was three times higher for children aged 6-16 years in the highest percentiles of BMI (>95th percentile) when compared to children in percentiles 25-49 (OR = 3.44; 95% CI, 1.49-7.96). No increase was observed in children aged 2-5 years. Low vitamin C intake was marginally related to self-reported current wheezing in children aged 6-16 years. Our results show that increased BMI may influence asthma prevalence in children, but further investigation is needed. (C) 2004 Wiley-Liss, Inc.(dagger) MH - Mexico|Morelos MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 15 U4 - Pediatrics;Respiratory System U5 - J;Article AV - English IS - 8755-6863 UR - ISI:000222395100004 L2 - childhood asthma;wheezing;body mass index;vitamin C;ADULT-ONSET ASTHMA; UNITED-STATES; LUNG-FUNCTION; CHILDREN; OBESITY; RISK; POPULATION; WEIGHT; ASSOCIATION; CONSUMPTION SO - Pediatric Pulmonology 2004 ;38(1):31-42 12291 UI - 6596 AU - Romieu I AU - Sienra-Monge JJ AU - Ramirez-Aguilar M AU - Moreno-Macias H AU - Reyes-Ruiz NI AU - Del Rio-Navarro BE AU - Hernandez-Avila M AU - London SJ AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoHosp Infantil Federico Gomez, Mexico City, DF, MexicoNIEHS, Res Triangle Pk, NC 27709, USARomieu, I, Inst Nacl Salud Publ, 655 Avenida Univ, Cuernavaca 62508, Morelos, Mexico TI - Genetic polymorphism of GSTM1 and antioxidant supplementation influence lung function in relation to ozone exposure in asthmatic children in Mexico City AB - Background: We recently reported that antioxidant supplementation with vitamins C and E mitigated ozone related decline in forced expiratory flow (FEF25-75) in 158 asthmatic children in an area with high ozone exposure in Mexico City. Methods: A study was undertaken to determine whether deletion of glutathione S-transferase M1 (GSTM1 null genotype), a gene involved in response to oxidative stress, influences ozone related decline in FEF25-75 and the benefit of antioxidant supplementation. Results: GSTM1 null children receiving placebo had significant ozone related decrements in FEF25-75 (percentage change per 50 ppb of ozone 2.9 (95% CI -5.2 to -0.6), p = 0.01); GSTM1 positive children did not. Conversely, the effect of antioxidants was stronger in children with the GSTM1 null genotype. Conclusions: Asthmatic children with a genetic deficiency of GSTM1 may be more susceptible to the deleterious effects of ozone on the small airways and might derive greater benefit from antioxidant supplementation MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 61 U4 - Respiratory System U5 - J;Article AV - English IS - 0040-6376 UR - ISI:000187515900005 L2 - S-TRANSFERASE M1; CANCER SO - Thorax 2004 ;59(1):8-10 12292 UI - 5742 AU - Romo-Figueroa MG AU - Vargas-Requena C AU - Sotelo-Mundoa RR AU - Vargas-Albores F AU - Higuera-Ciapara I AU - Soderhall K AU - Yepiz-Plascencia G AD - DTAOA, Ctr Invest Alimentac & Desarrollo AC, Hermosillo 83000, Sonora, MexicoCtr iNvest Alimentac & Desarrollo AC, Unidad Guaymas, Hermosillo 83000, Sonora, MexicoUppsala Univ, Dept Comp Physiol, Evolut Biol Ctr, Uppsala, SwedenYepiz-Plascencia, G, DTAOA, Ctr Invest Alimentac & Desarrollo AC, POB 1735, Hermosillo 83000, Sonora, Mexico TI - Molecular cloning of a beta-glucan pattern-recognition lipoprotein from the white shrimp Penaeus (Litopenaeus) vannamei: correlations between the deduced amino acid sequence and the native protein structure AB - The hemolymph pattern-recognition P-glucan binding protein from the white shrimp Penaeus (Litopenaeus) vannamei is also a high density lipoprotein (betaGBP-HDL) involved in innate immunity. The betaGBP-HDL full length cDNA sequence determined was 6.3 kb long, and contains a long 3'UTR region with a polyadenylation signal and a poly-A(+) tail. The open reading frame is 1454 amino acids long and the N-terminal residue of the mature protein is localized in position 198 of the ORF. Comparison of the betaGBP-HDL amino acid sequence against GenBank detected only significant similarity to betaGBP from the crayfish Pacifastacus leniusculus. betaGBP-HDL is expressed in hepatopancreas, muscle, pleopods and gills, but not in hemocytes as determined by RT-PCR. We discuss the analysis of the deduced primary sequence in terms of the predicted secondary structure, glucanase-like and RGD motives relevant to its dual roles in defence and lipid transport. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Sonora MH - Sweden PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Immunology;Zoology U5 - J;Article AV - English IS - 0145-305X UR - ISI:000220752000006 L2 - shrimp;prawn;beta-1,3-glucan-binding protein;cDNA;RGD-motif;glucanase-like;glucan;pattern-recognition;high density lipoprotein;HIGH-DENSITY-LIPOPROTEIN; BETA-1,3-GLUCAN BINDING-PROTEIN; HYDROPHOBIC CLUSTER-ANALYSIS; IMMUNE RECOGNITION; MANDUCA-SEXTA; RGD SEQUENCE; PLASMA HDL; HEMOLYMPH; CRAYFISH; CDNA SO - Developmental and Comparative Immunology 2004 ;28(7-8):713-726 12293 UI - 4419 AU - Rook GAW AU - Hernandez-Pando R AU - Dheda K AU - Seah GT AD - Royal Free & Univ Coll, Ctr Infect Dis & Int Hlth, Windeyer Inst Med Sci, Sch Med, London W1T 4JF, EnglandInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoNatl Univ Singapore, Dept Microbiol, Singapore 117597, SingaporeRook, GAW, Royal Free & Univ Coll, Ctr Infect Dis & Int Hlth, Windeyer Inst Med Sci, Sch Med, 46 Cleveland St, London W1T 4JF, England TI - IL-4 in tuberculosis: implications for vaccine design AB - Current attempts to find a vaccine for tuberculosis (TB) are based on the assumption that it must drive a Th1 response. We review the evidence that progressive disease might not be due to absence of Th1, but rather to the subversive effect of an unusual Th2-like response, involving interleukin-4 (IL-4) and IL-4delta2. This Th2-like response can impair bactericidal function and lead to toxicity of tumour necrosis factor-alpha (TNF-alpha) and to pulmonary fibrosis. If this is important, effective vaccines will need to suppress pre-existing Th2-like activity. Such vaccines are feasible and are active therapeutically in mouse TB MH - United Kingdom MH - Mexico|Distrito Federal MH - Singapore PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 51 U4 - Immunology U5 - J;Review AV - English IS - 1471-4906 UR - ISI:000223871400006 L2 - ALTERNATIVE SPLICE VARIANT; CYTOKINE GENE ACTIVATION; NECROSIS-FACTOR-ALPHA; REGULATORY T-CELLS; MYCOBACTERIUM-TUBERCULOSIS; PULMONARY TUBERCULOSIS; BOVINE TUBERCULOSIS; MESSENGER-RNA; GAMMA-INTERFERON; DNA VACCINATION SO - Trends in Immunology 2004 ;25(9):483-488 12294 UI - 6204 AU - Rosa-Gonzalez D AU - Terlevich R AU - Terlevich E AU - Friaca A AU - Gaztanaga E AD - INAOE, Puebla 72840, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Sao Paulo, Inst Astron & Geofis, BR-05508900 Sao Paulo, BrazilInst Estudis Espacials Catalunya, Barcelona 08034, SpainRosa-Gonzalez, D, INAOE, Luis Enrique Erro 1, Puebla 72840, Mexico TI - On the detectability of the Sunyaev-Zel'dovich effect of massive young galaxies AB - The Sunyaev-Zel'dovich (SZ) effect, expected to be associated with massive star formation activity produced during the formation of the most luminous bulges of normal galaxies, is discussed. Using 1D chemohydrodynamical models for spheroidal galaxy evolution, we show that, during the early epochs of galaxy evolution, the gas in massive events of star formation may reach temperatures and densities high enough to produce values of the Comptonization parameter y comparable to those present in galaxy clusters. In this scenario, we discuss the possibility of detection of the SZ signature in high-redshift star-forming galaxies with the next generation of millimetre telescopes capable of arcsec resolution and equipped with high-sensitivity detectors. We show how millimetre colour-colour diagrams or diagnostic diagrams could be used to distinguish between the dust emission and the SZ effect, and suggest the use of simultaneous multifrequency observations to improve the chances of detecting the SZ effect MH - Brazil MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000189024200027 L2 - galaxies : evolution;cosmic microwave background;radio continuum : galaxies;LYMAN BREAK GALAXIES; RADIO-QUIET QUASARS; HUBBLE DEEP FIELD; STAR-FORMATION; COSMOLOGICAL PARAMETERS; CLUSTER SURVEYS; LOCAL UNIVERSE; X-RAY; EVOLUTION; DUST SO - Monthly Notices of the Royal Astronomical Society 2004 ;348(2):669-678 12295 UI - 5461 AU - Rosado JL AU - Stoltzfus RJ AU - Ronquillo D AU - Sosa C AD - Univ Autonoma Queretaro, Queretaro, MexicoCornell Univ, Ithaca, NY 14853, USA TI - Lead concentration in blood is associated with a significant decrease in linear growth independent of iron and zinc nutritional status MH - Mexico|Queretaro MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470700666 SO - Faseb Journal 2004 ;18(5):A898-A898 12296 UI - 5595 AU - Rosales-Corral S AU - Tan DX AU - Reiter RJ AU - Valdivia-Velazquez M AU - costa-Martinez JP AU - Ortiz GG AD - Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Guadalajara 44340, Jalisco, MexicoUniv Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78284, USARosales-Corral, S, Inst Mexicano Seguro Social, Ctr Invest Biomed Occidente, Sierra Mojada 800, Guadalajara 44340, Jalisco, Mexico TI - Kinetics of the neuroinflammation-oxidative stress correlation in rat brain following the injection of fibrillar amyloid-beta onto the hippocampus in vivo AB - The purpose of this study was to describe-following the injection of a single intracerebral dose of fibrillar amyloid-beta(1-40) in vivo-some correlations between proinflammatory cytokines and oxidative stress indicators in function of time, as well as how these variables fit in a regression model. We found a positive, significant correlation between interleukin (IL)-1beta or IL-6 and the activity of the glutathione peroxidase enzyme (GSH-Px), but IL-1beta or IL-6 maintained a strong, negative correlation with the lipid peroxidation (LPO). The first 12 It marked a positive correlation between IL-6 and tumor necrosis factor-alpha (TNF-alpha), but starting from the 36 h, this relationship became negative. We found also particular patterns of behavior through the time for IL-1beta, nitrites and IL-6, with parallel or sequential interrelationships. Results shows clearly that, in vivo, the fibrillar amyloid-beta (Abeta) disrupts the oxidative balance and initiate a proinflammatory response, which in turn feeds the oxidative imbalance in a coordinated, sequential way. This work contributes to our understanding of the positive feedbacks, focusing the "cytokine cycle" along with the oxidative stress mediators in a complex, multicellular, and interactive environment. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Neurosciences U5 - J;Article AV - English IS - 0165-5728 UR - ISI:000221156100004 L2 - amyloid-beta;oxidative stress;neuroinflammatory response;kinetics;cytokine;interleukin;tumor necrosis factor;TRANSGENIC TG2576 MICE; NITRIC-OXIDE SYNTHASE; NECROSIS-FACTOR-ALPHA; ALZHEIMERS-DISEASE; INTERFERON-GAMMA; GLUTATHIONE-PEROXIDASE; CEREBROSPINAL-FLUID; GENE-EXPRESSION; HUMAN-MONOCYTES; CYTOKINES SO - Journal of Neuroimmunology 2004 ;150(1-2):20-28 12297 UI - 6292 AU - Rosales-Serna R AU - Kohashi-Shibata J AU - costa-Gallegos JA AU - Trejo-Lopez C AU - Ortiz-Cereceres J AU - Kelly JD AD - INIFAP, Bean Program, Celaya 38000, Gto, MexicoIRENAT, Programa Bot, Colegio Postgrad, Montecillo 56230, Edo, MexicoIREGEP, Montecillo 56230, Edo Mexico, MexicoMichigan State Univ, E Lansing, MI 48824, USAAcosta-Gallegos, JA, INIFAP, Bean Program, Campo Expt Bajio,Apartado Postal 112, Celaya 38000, Gto, Mexico TI - Biomass distribution, maturity acceleration and yield in drought-stressed common bean cultivars AB - Common bean (Phaseolus vulgaris L.) is an important food crop grown under rainfed conditions in Latin America where drought is a major limiting factor for production. The objective of this study was to assess the role of phenological adjustment and shoot biomass distribution on seed yield of drought-stressed common bean. Four cultivars differing in growth habit, gene pool origin, and contrasting responses under drought, were tested during 2001 at two locations in Mexico: Cotaxtla, Veracruz (lowlands) where the effect of terminal drought (TD) (end-of-season) was evaluated, and Texcoco, State of Mexico (highlands), where the effects of intermittent and terminal drought were evaluated. Seed yield, plant shoot biomass, and days to flowering and to physiological maturity were recorded. Leaf relative water content (RWC) was recorded after the onset of the intermittent drought (ID) treatment in Texcoco. The drought intensity index was 0.37 in Cotaxtla compared to 0.49 and 0.58 under TD and ID, respectively in Texcoco. Days to flowering and to physiological maturity showed a negative and significant relationship with seed yield. Under drought stress, a significant reduction in the harvest index was observed in susceptible cultivars. All cultivars showed higher values of shoot biomass accumulation, pod and seed number, seed weight and RWC at the basal nodes of the plant across locations and moisture treatments. Cultivar Pinto Villa exhibited the highest biomass accumulation and seed yield across treatments and locations. Significant reduction in number of days to maturity was observed under drought, mainly in resistant cultivars, Pinto Villa and G4523. Maturity acceleration, coupled with a high seed filling rate, contributed to lessen the impact of drought stress in resistant common bean cultivars. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Estado De Mexico MH - Mexico|Guanajuato MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000188883500010 L2 - Phaseolus vulgaris L.;phytomers;intermittent drought;terminal drought;WATER RELATIONS; RESISTANCE; IRRIGATION; GROWTH SO - Field Crops Research 2004 ;85(2-3):203-211 12298 UI - 1967 AU - Rosario CC AU - Lopez CC AU - Tellez IG AU - Navarro OA AU - Anderson RC AU - Eslava CC AD - FMVZ, Dept Anim Prod, Mexico City 04510, DF, MexicoFM UNAM, Dept Salud Publ, Mexico City 04510, DF, MexicoUniv Arkansas, Ctr Excellence Poultry Sci, Fayetteville, AR 72701, USAUSDA ARS, So Plains Agr Res Ctr, College Stn, TX 77845, USARosario, CC, FMVZ, Dept Anim Prod, Mexico City 04510, DF, Mexico TI - Serotyping and virulence genes detection in Escherichia coli isolated from fertile and infertile eggs, dead-in-shell embryos, and chickens with yolk sac infection AB - Escherichia coli is a common avian pathogen mainly associated with extraintestinal infections such as yolk sac infection (YSI). The aim of this study was to determine the serotypes and the presence of some virulence genes of E coli strains isolated from different samples in a vertically integrated poultry operation in Mexico. Two hundred sixty-seven E coli isolates from different samples were serotyped using rabbit serum against the 175 somatic (0) and 56 flagellar (H) antigens of the typing schema. Virulence genes were determined by colony blot hybridization, using DNA probes for st, eae, agg1, agg2, bfp, lt, cdt, slt, and ipaH diarrhea-associated virulence factors. The serogroup of 85% of the strains was determined; 019 (12%), 084 (9%), 08 (6%), and 078 (5%) were the most common. Using the complete antigenic formula (0 and H), 019:NM (n = 31) was the serorype most frequently isolated from dead-in-shell embryos and in broilers that had died on the fourth, fifth, sixth, and seventh days after hatch. One hundred ten strains (41.2%) hybridized with one or more of the used probes. Of these, ipaH (72%), eae (30%), and cdt (27%) were the most common. Considering the origin of the respective isolates, 40% of the broiler farm strains were positive for at least one probe. Results show that some avian E coli strains isolated in Mexico are included in avian pathogenic E. coli serotypes not previously reported, suggesting that they could be specific for this geographic area. The wide distribution of the ipaH gene among nonmotile strains suggests that this invasiveness trait could be important in YSI pathogenesis. On the other hand, some other genes could contribute to E coli virulence during YSI MH - Mexico|Distrito Federal MH - USA PB - ATHENS: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000229917300007 L2 - Escherichia coli;yolk sac infection;serotyping;DNA hybridization;virulence genes;CYTOLETHAL DISTENDING TOXIN; INVIVO CHARACTERIZATION; ANTIBIOTIC-SENSITIVITY; AVIAN COLIBACILLOSIS; MULTIPLEX PCR; O-SEROGROUP; DNA PROBES; STRAINS; ASSAY; IDENTIFICATION SO - Avian Diseases 2004 ;48(4):791-802 12299 UI - 3646 AU - Rosas-Rosas A AU - Juan-Salles C AU - Rodriguez-Arellanes G AU - Taylor ML AU - Garner MM AD - Africam Safari, Dept Anim Hlth, Puebla, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoNW ZooPath, Monroe, WA 98272, USAJuan-Salles, C, Africam Safari, Dept Anim Hlth, 11 Oriente 2407,Col Azcarate,CP 72007, Puebla, Mexico TI - Disseminated Histoplasma capsulatum var capsulatum infection in a captive mara (Dolichotis patagonum) MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - LONDON: BRITISH VETERINARY ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0042-4900 UR - ISI:000225654900018 SO - Veterinary Record 2004 ;155(14):426-428 12300 UI - 4438 AU - Rosas C AU - Cooper EL AU - Pascual C AU - Brito R AU - Gelabert R AU - Moreno T AU - Miranda G AU - Sanchez A AD - Univ Nacl Autonoma Mexico, Lab Ecol & Biol Marina Expt, Fac Ciencias, Merida 97130, Yucatan, MexicoUniv Calif Los Angeles, Lab Comparat Immunol, Dept Neurobiol, David Geffen Sch Med, Los Angeles, CA 90095, USAUniv Autonoma Carmen, Fac Ciencias Pesqueras, Cd Del Carmen, Campeche, MexicoUniv Autonoma Carmen, Fac Quim, Cd Del Carmen, Campeche, MexicoPEMEX Explorac & Prod, Reg Marina Noreste, Cd Del Carmen, Campeche, MexicoRosas, C, Univ Nacl Autonoma Mexico, Lab Ecol & Biol Marina Expt, Fac Ciencias, Calle 8 A 248x5,Vista Alegre Norte, Merida 97130, Yucatan, Mexico TI - Indicators of physiological and immunological status of Litopenaeus setiferus wild populations (Crustacea, Penaeidae) AB - Constant environmental changes in oceanic and estuarine systems due to human activity in coastal zones require different tools and strategies for their study to be able to assess the health status of aquatic ecosystems. The Gulf of Mexico has a tremendous ecological importance because of its biological diversity. Baseline levels of blood metabolites and immune components were defined for wild tropical populations of Litopenaeus setiferus, an important shrimp species of the Gulf of Mexico. Osmotic pressure, oxy hemocyanin (OxyHc), glucose, proteins, cholesterol, lactate, and triacylglycerols (TAG) were used as indicators of physiological status; pro phenoloxydase (proPO) and phenoloxydase (PO) quantification of hemocytes, as well as respiratory burst, were used to assess the immunological status. Significant differences were observed in live weight of juveniles, males, and females of L. setiferus with mean values of 10.54, 35.05, and 40.33) g, respectively. A value of 460 mOsm/kg was recorded in the water where Juveniles were sampled and 1,000 mOsm/kg in adult sampling zones. Consequently, the osmotic pressure of L. setiferus juveniles (718.02 mOsm/kg) was 22% lower than in adults (925 mOsm/kg); there were no differences between sexes. A significantly lower value in Juvenile OxyHc was observed. This value was 24 and 16% lower than that observed in males and females, respectively. Hemolymph glucose, cholesterol, and triacylglycerol levels were not statistically different between shrimp stages, showing median values of 0.19, 0.32, and 0.39 mg/ml of glucose, cholesterol, and triacylglycerols, respectively. Hemocyanin was distributed normally in the juvenile male population but not in females. A proportion between 52 to 81% of OxyHc of the total protein (OxyHc/Prot) was obtained for all stages. Digestive gland glycogen showed no normal distribution in juveniles and adults. Digestive gland glycogen was significantly higher in Juveniles (median value of 2.64 mg/g) than in adults (median value of 1.58 mg/g). A higher value of lactate (0.11 mg/ml) was observed in juveniles than in males (0.09 mg/ml) and females (0.04 mg/ml). Granular cells (GC) corresponded to 36, 44, and 39% of the total hemocytes (TH) observed in Juveniles, males, and females. ProPO showed no normal distribution in all stages. A high proPO activity was recorded in L. setiferus females that was 95% higher than in the juvenile-male group. Respiratory burst was divided into two groups, juveniles-males and females, and was distributed normally in both. Female respiratory burst values were 40 and 45% higher than those observed in the juvenile and male groups, respectively. There was an increment in OxyHc, proteins, PO, hemocytes, and respiratory burst with an increase in body weight. In contrast, the relationship of live weight to glucose, TAG, and proPO revealed no significant regressions. A significant decrease in cholesterol, glycogen, and lactate with an increase in body weight was also observed. We now have indicators of nutritional and immune status of juveniles and adults that can reveal changes in trophic relations and health at the population level. This will serve as a basis for using L. setiferus as environmental sentinels, as non-controversial and inexpensive models to evaluate the potential changes that human activities could exert on this important marine ecosystem MH - Mexico|Campeche MH - Mexico|Yucatan MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 6 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000223098200020 L2 - SHRIMP PENAEUS-CALIFORNIENSIS; HEMOLYMPH METABOLIC VARIABLES; DIETARY CARBOHYDRATE-LEVELS; IMMUNE-RESPONSE; VANNAMEI JUVENILES; BIOCHEMICAL-COMPOSITION; BLOOD METABOLITES; CLOTTING PROTEIN; DISSOLVED-OXYGEN; TIGER SHRIMP SO - Marine Biology 2004 ;145(2):401-413 12301 UI - 4156 AU - Rosenblueth JF AD - Univ Nacl Autonoma Mexico, IIMAS, Mexico City 01000, DF, MexicoWeizmann Inst Sci, IL-76100 Rehovot, IsraelRosenblueth, JF, Univ Nacl Autonoma Mexico, IIMAS, Apartado Postal 20-726, Mexico City 01000, DF, Mexico TI - A new notion of conjugacy for isoperimetric problems AB - For problems in the calculus of variations with isoperimetric side constraints, we provide in this paper a set of points whose emptiness, independently of nonsingularity assumptions, is equivalent to the nonnegativity of the second variation along admissible variations. The main objective of introducing a characterization of this condition should be, of course, to obtain a simpler way of verifying it. There are two other sets of points available in the literature, introduced by Loewen and Zheng (1994) and Zeidan (1996), for which this necessary condition implies their emptiness. However, we show that verifying membership of these sets may be more difficult than checking directly if that condition holds. Contrary to this behavior, we prove that the desired objective of characterizing that condition is achieved by means of the set introduced in this paper MH - Israel MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0095-4616 UR - ISI:000224611900002 L2 - isoperimetric problems;calculus of variations;conjugate points;nonsingular extremals;COUPLED POINTS; EXTREMALS; EQUATION; BOLZA SO - Applied Mathematics and Optimization 2004 ;50(3):209-228 12302 UI - 4604 AU - Rosenfeldt H AU - Vazquez-Prado J AU - Gutkind JS AD - NIDCR, Oral & Pharyngeol Canc Branch, DHHS, NIH, Bethesda, MD 20892, USAInst Politecn Nacl, CINVESTAV, Dept Pharmacol, Mexico City 07000, DF, MexicoGutkind, JS, NIDCR, Oral & Pharyngeol Canc Branch, DHHS, NIH, Bethesda, MD 20892 USA TI - P-REX2, a novel PI-3-kinase sensitive Rac exchange factor AB - We have identified an activator of Rac, P-REX2, that is structurally related to the exchange factor PtdIns(3,4,5)-dependent Rac exchanger (P-REX1), but exhibits distinct tissue-specific expression. P-REX2 is spliced into two RNA species, similar to3.5 and similar to10 kb in size. The cDNA corresponding to the smaller transcript encodes a protein that exhibits strong similarity with P-REX1 within its N-terminal domains, but differs in the C-terminal region. P-REX2 promoted increased levels of GTP-bound Rac that could be further stimulated by enhancing PI-3K activity. Thus, P-REX2 may serve as a novel link between Rac activation and the PI-3 kinase pathway. (C) 2004 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000223519300030 L2 - guanine nucleotide exchange factor;PI-3K;G-protein;GENOMIC DNA; ACTIVATION; IQGAP1; CDC42; BLAST; LINK; RHO SO - Febs Letters 2004 ;572(1-3):167-171 12303 UI - 4397 AU - Roskovensky JK AU - Liou KN AU - Garrett TJ AU - Baumgardner D AD - Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095, USAUniv Utah, Dept Meteorol, Salt Lake City, UT 84112, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoRoskovensky, JK, Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, 405 Hilgard Ave, Los Angeles, CA 90095 USA TI - Simultaneous retrieval of aerosol and thin cirrus optical depths using MODIS airborne simulator data during CRYSTAL-FACE and CLAMS AB - We have developed a new methodology to simultaneously retrieve the optical depths of aerosols and thin cirrus clouds over the oceans by using the Moderate Resolution Imaging Spectroradiometer ( MODIS) Airborne Simulator (MAS) data. This methodology takes advantage of the fact that the visible ( or a near-infrared window) reflectance from cirrus can be characterized by its correlation to the reflectance from a near-infrared band located in a strong water vapor absorption region. Once the reflectance due to cirrus has been removed, the residual reflectance in these bands is used to retrieve aerosol optical depth. Cirrus cloud properties are subsequently obtained by minimizing the difference between observed and calculated reflectance values stored in look-up tables that are constructed a priori and correlated to the retrieved aerosol optical depth. Examination of the data gathered from the recent Cirrus Regional Study of Tropical Anvils and Cirrus Layers - Florida Area Cirrus Experiment (CRYSTAL-FACE) and Chesapeake Lighthouse and Aircraft Measurements for Satellites ( CLAMS) field campaigns demonstrates that our retrievals are consistent with both in-situ and ground based measurements MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 6 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000224126000002 L2 - SOLAR RADIATIVE-TRANSFER; ICE CRYSTALS; CLOUDS; CHANNELS; TEMPERATURE; SENSITIVITY; SCATTERING; INSTRUMENT; RATIO SO - Geophysical Research Letters 2004 ;31(18): 12304 UI - 4640 AU - Ross EJH AU - Stone JM AU - Elowsky CG AU - rredondo-Peter R AU - Klucas RV AU - Sarath G AD - Univ Nebraska, Dept Biochem & Plant Sci Initiat, Lincoln, NE 68588, USAJohns Hopkins Univ, Sch Med, Div Gastroenterol, Baltimore, MD 21205, USAUniv Autonoma Estado Morelos, Lab Biofis & Biol Mol, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Nebraska, USDA ARS, Wheat Sorghum & Forage Unit, Lincoln, NE 68583, USARoss, EJH, Univ Nebraska, Dept Entomol, Lincoln, NE 68583, USA TI - Activation of the Oryza sativa non-symbiotic haemoglobin-2 promoter by the cytokinin-regulated transcription factor, ARR1 AB - Using in silico methods, several putative phytohormone-responsive cis-elements in the Oryza sativa nonsymbiotic haemoglobin (NSHB) 1-4 and Arabidopsis thaliana NSHB1-2 promoters have been identified. An OsNSHB2 promoter::GUS reporter gene fusion shows tissue-specific expression in A. thaliana. GUS expression was observed in roots, the vasculature of young leaves, in flowers, and in the pedicel/stem junction. In transient assays, activity of the OsNSHB2 promoter was significantly up-regulated in the presence of the cytokinin, 6-benzylaminopurine (BA). Deletion analyses indicated that the full-length promoter was required for maximal trans-activation in the presence of cytokinin. Mutation of the single cytokinin-regulated ARR1-binding element abolished promoter activation in response to cytokinin. Constitutive expression of ARR1 under the control of the 35S cauliflower mosaic virus promoter enhanced wild-type OsNSHB2 promoter activity, but had no effect on the activity of the mutated promoter in the absence of cytokinin. However, overexpression of ARR1 in the presence of cytokinin resulted in super-activation of the wild-type promoter. The mutated promoter was only moderately activated in the presence of cytokinin and ARR1, indicating that the OsNSHB2 promoter can be regulated by the ARR1 protein, but requires other cytokinin-induced factors for optimal activation. This is the first report that identifies a trans-acting factor involved in the activation of a NSHB gene MH - Mexico|Morelos MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000223348400013 L2 - ARR proteins;cytokinins;gene regulation;non-symbiotic plant haemoglobin;PHOSPHORELAY SIGNAL-TRANSDUCTION; ARABIDOPSIS-THALIANA; RESPONSE REGULATORS; NONSYMBIOTIC HEMOGLOBINS; GENES; PLANTS; EXPRESSION; RICE; ETHYLENE; FAMILY SO - Journal of Experimental Botany 2004 ;55(403):1721-1731 12305 UI - 5493 AU - Rosselli-Cock M AU - Matute-Villasenor E AU - rdila-Ardila A AU - Botero-Gomez VE AU - Tangarife-Salazar GA AU - Echeverria-Pulido SE AU - rbelaez-Giraldo C AU - Mejia-Quintero M AU - Mendez LC AU - Villa-Hurtado PC AU - Ocampo-Agudelo P AD - Florida Atlantic Univ, Davie, FL, USAUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoFlorida Int Univ, Miami, FL 33199, USAUniv Manizales, Manizales, ColombiaArdila-Ardila, A, 12230 NW 8 St, Miami, FL 33182, USA TI - Neuropsychological assessment of children: A test battery for children between 5 and 16 years of age. A Colombian normative study AB - Introduction. A neuropsychological test battery for 5 to 16-year-old children has recently been developed. This battery is called Neuropsychological Assessment of Children (Evaluacion Neuropsicologica Infantil, ENI) and it includes the following sections: attention, constructional skills, memory encoding, perceptual skills, memory recall, language, metalinguistic skills, reading, writing, arithmetic, spatial skills, conceptual skills and executive functions. Aims. Our aim was to obtain norms for the ENI in a Colombian population between 5 and 16 years of age. Subjects and methods. We selected 252 children (92 boys and 160 girls) in the city of Manizales (Colombia), and they were administered the ENI. In order to obtain an external validity, 21 of the participants were also given the Wechsler Intelligence Scale for Children-Revised (WISC-R). Results. Statistically significant differences were found on most of the subtests across age groups. Differences between boys and girls appeared more specifically in tests of visuoperceptual, visual constructional, spatial and numerical skills. Some of the ENI subtests correlated with the WISC-R subtests. Conclusions. It is suggested that the ENI could satisfy the existing need in the Spanish-speaking world for neuropsychological tools with which to assess children and adolescents MH - Colombia MH - Mexico|Jalisco MH - USA PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 3 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000221462100005 L2 - child neuropsychology;cognitive development;Colombia;ENI;neuropsychological evaluation;norms in Spanish;CARD SORTING TEST; 12-YEAR-OLD CHILDREN; DEVELOPMENTAL NORMS; ABILITIES; INTELLIGENCE; 5-YEAR-OLD; LANGUAGE; MEMORY SO - Revista de Neurologia 2004 ;38(8):720-731 12306 UI - 4036 AU - Rothkaehl H AU - Izohkina N AU - Prutensky I AU - Pulinets S AU - Parrot M AU - Lizunov G AU - Blecki J AU - Stanislawska I AD - Space Res Ctr, Warsaw, PolandRussian Acad Sci, IZMIRAN, Troitsk, Moscow Region, RussiaUNAM, Inst Geofis, Coyoacan, MexicoCNRS, LPCE, Orleans, FranceKyiv Shevchenko Univ, Kiev, UkraineRothkaehl, H, Space Res Ctr, Warsaw, Poland TI - Ionospheric disturbances generated by different natural processes and by human activity in Earth plasma environment AB - The magnetosphere-ionosphere-thermosphere subsystem is strongly coupled via the electric field, particle precipitation, heat flows and small scale interaction. Satellites in situ measurements and ground based complex diagnostics can provide comprehensive coverage of both time and geomagnetic place effects. Human activity also can perturb Earth's environment, but few are connected with controlled experiments in the ionosphere and are transient. Most of them are related to industrial activity and have increased in recent years. The most important power sources are broadcasting transmitters, power stations, power lines and heavy industry. At ionospheric altitude some disturbances and physical processes are related to seismic activity, thunderstorm activity and some global changes in the Earth environment such as ozone holes. Various natural and artificial indicators can affect satellite telecommunication quality. The aim of this presentation is to report progress in understanding the physical processes in the ionosphere described above and to assess the application of these considerations to the study of plasma effects on Earth-space and satellite-to-satellite communication MH - France MH - Mexico|Distrito Federal MH - Poland MH - Russia MH - Ukraine PB - BOLOGNA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1593-5213 UR - ISI:000224826100019 L2 - ELF/VLF EMISSIONS; REGION; SATELLITE; TROUGH; CUSP SO - Annals of Geophysics 2004 ;47(2-3):1215-1225 12307 UI - 4817 AU - Roux MV AU - Temprado M AU - Jimenez P AU - Davalos JZ AU - Notario R AU - Martin-Valcarcel G AU - Garrido L AU - Guzman-Mejia R AU - Juaristi E AD - CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, SpainCSIC, Inst Ciencia & Tecnol Polimeros, Dept Quim Fis, E-28006 Madrid, SpainInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoRoux, MV, CSIC, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain TI - Thermochemistry of 1,3-dithiacyclohexane 1-oxide (1,3-dithiane sulfoxide): Calorimetric and computational study AB - The enthalpies of combustion and sublimation of 1,3-dithiacyclohexane 1-oxide (1,3-dithiane sulfoxide, 2) were measured by a rotating-bomb combustion calorimeter and the Knudsen effusion technique, and the gas-phase enthalpy of formation was determined, DeltafHdegrees(m) (g) = -98.0 +/- 1.9 kJ mol(-1). This value is not as large (negative) as could have been expected from comparison with thermochemical data available for the thiane/thiane oxide reference system. High-level ab initio molecular orbital calculations at the MP2(FULL)/6-31G(3df,2p) level were performed, and the optimized molecular and electronic structures of 2 afforded valuable information on (1) the relative conformational energies of 2-axial and 2-equatorial-the latter being 7.1 kJ mol(-1) more stable than 2-axial, (2) the possible involvement of n(S) --> sigma*(C-S(O)) hyperconjugation in 2-equatorial, (3) the lack of computational evidence for sigma(S-C) --> sigma*(S-O) stereoelectronic interaction in 2-equatorial, and (4) the relevance of a repulsive electrostatic interaction between sulfur atoms in 1,3-dithiane sulfoxide, which apparently counterbalances any n(S) --> sigma*(C-S(O)) stabilizing hyperconjugative interaction and accounts for the lower than expected enthalpy of formation for sulfoxide 2 MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000223008100040 L2 - HYDROCARBONS INCLUDING AROMATICS; STANDARD MOLAR ENTHALPY; AB-INITIO LEVELS; CONFORMATIONAL-ANALYSIS; VAPOR-PRESSURES; ORGANIC THERMOCHEMISTRY; ELECTRON-DIFFRACTION; ASYMMETRIC-SYNTHESIS; GAUSSIAN-2 THEORY; THIANE SULFOXIDE SO - Journal of Organic Chemistry 2004 ;69(16):5454-5459 12308 UI - 6094 AU - Roux MV AU - Temprado M AU - Jimenez P AU - Notario R AU - Guzman-Mejia R AU - Juaristi E AD - CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, SpainIPN, Dept Quim, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoRoux, MV, CSIC, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain TI - Calorimetric and computational study of 1,3-dithiacyclohexane 1,1-dioxide (1,3-dithiane sulfone) AB - The enthalpies of combustion and sublimation of 1,3-dithiacyclohexane 1,1-dioxide (1,3-dithiane sulfone) were measured by a rotating-bomb combustion calorimeter and the Knudsen effusion technique, and the gas-phase enthalpy of formation was determined, Delta(f)H(m)(o)(g) = -326.3 +/- 2.0 kJ m mol(-1). Standard ab initio molecular orbital calculations at the G2(MP2) level were performed, and a theoretical study on molecular and electronic structure of the compound has been carried out. Calculated Delta(f)H(m)(o)(g) values agree very well with the experimental one. These experimental and theoretical studies support the relevance of the repulsive electrostatic interaction between sulfur atoms in 1,3-dithiane sulfone, that apparently counterbalances any n(s) --> sigma(C-SO2)(*) stabilizing hyperconjugative interaction MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000189278900034 L2 - HYDROCARBONS INCLUDING AROMATICS; STANDARD MOLAR ENTHALPY; AB-INITIO LEVELS; VAPOR-PRESSURES; THERMOCHEMICAL PROPERTIES; ORGANIC THERMOCHEMISTRY; GAUSSIAN-2 THEORY; THIANE SULFOXIDE; GASEOUS-PHASE; SUBLIMATION SO - Journal of Organic Chemistry 2004 ;69(5):1670-1675 12309 UI - 5035 AU - Rowan-Robinson M AU - Lari C AU - Perez-Fournon I AU - Gonzalez-Solares EA AU - La Franca F AU - Vaccari M AU - Oliver S AU - Gruppioni C AU - Ciliegi P AU - Heraudeau P AU - Serjeant S AU - Efstathiou A AU - Babbedge T AU - Matute I AU - Pozzi F AU - Franceschini A AU - Vaisanen P AU - fonso-Luis A AU - Alexander DM AU - Almaini O AU - Baker AC AU - Basilakos S AU - Barden M AU - del Burgo C AU - Bellas-Velidis I AU - Cabrera-Guerra F AU - Carballo R AU - Cesarsky CJ AU - Clements DL AU - Crockett H AU - Danese L AU - Dapergolas A AU - Drolias B AU - Eaton N AU - Egami E AU - Elbaz D AU - Fadda D AU - Fox M AU - Genzel R AU - Goldschmidt P AU - Gonzalez-Serrano JI AU - Graham M AU - Granato GL AU - Hatziminaoglou E AU - Herbstmeier U AU - Joshi M AU - Kontizas E AU - Kontizas M AU - Kotilainen JK AU - Kunze D AU - Lawrence A AU - Lemke D AU - Linden-Vornle MJD AU - Mann RG AU - Marquez I AU - Masegosa J AU - McMahon RG AU - Miley G AU - Missoulis V AU - Mobasher B AU - Morel T AU - Norgaard-Nielsen H AU - Omont A AU - Papadopoulos P AU - Puget JL AU - Rigopoulou D AU - Rocca-Volmerange B AU - Sedgwick N AU - Silva L AU - Sumner T AU - Surace C AU - Vila-Vilaro B AU - van der Werf P AU - Verma A AU - Vigroux L AU - Villar-Martin M AU - Willott CJ AU - Carraminana A AU - Mujica R AD - Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, EnglandIst Radioastron, I-40129 Bologna, ItalyInst Astrofis Canarias, E-38200 San Cristobal la Laguna, SC de Tenerife, SpainUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandUniv Studi Roma TRE, Dipartimento Fis, I-00146 Rome, ItalyUniv Padua, Dipartimento Astron, I-35122 Padua, ItalyUniv Sussex, Ctr Astron, Dept Phys & Astron, Brighton BN1 9QJ, E Sussex, EnglandOsservatorio Astron Bologna, I-40127 Bologna, ItalyUniv Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, NetherlandsUniv Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7HR, Kent, EnglandCyprus Coll, Dept Comp Sci & Engn, CY-1516 Nicosia, CyprusEuropean So Observ, Santiago 19, ChileUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandESO, D-85748 Garching, GermanyUniv Cantabria, Consejo Super Invest Cient, Inst Fis Cantabria, E-39005 Santander, SpainMax Planck Inst Extraterr Phys, D-85740 Garching, GermanyAstron Inst, Natl Observ Athens, GR-11810 Athens, GreeceUniv Cantabria, Dept Matemat Aplicada, E-39005 Santander, SpainCEA Saclay, F-91191 Gif Sur Yvette, FranceSISSA, Int Sch Adv Studies, I-34014 Trieste, ItalyUniv Arizona, Steward Observ, Tucson, AZ 85721, USAMax Planck Inst Astron, Konigstuhl MPIA 17, D-69117 Heidelberg, GermanyUniv Athens, Dept Phys, Sect Astrophys Astron & Mech, GR-15783 Zografos, GreeceUniv Turku, Tuorla Observ, FIN-21500 Piikkio, FinlandNiels Bohr Inst Astron Phys & Geophys, Astron Observ, DK-2100 Copenhagen O, DenmarkDanish Space Res Inst, DK-2100 Copenhagen O, DenmarkCSIC, Inst Astrofis Andalucia, E-18080 Granada, SpainSpace Telescope Sci Inst, Baltimore, MD 21218, USAInst Astrophys, F-75014 Paris, FranceLeiden Observ, NL-2300 RA Leiden, NetherlandsUniv Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, FranceNatl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, CanadaESTEC, NL-2200 AG Noordwijk, NetherlandsUniv Oxford, Dept Phys, Oxford OX1 3RH, EnglandOsserv Astron Palermo, Ist Nazl Astrofis, I-90134 Palermo, ItalyUniv Helsinki Observ, FIN-00014 Helsinki, FinlandUniv Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, EnglandINAOE, Puebla, MexicoRowan-Robinson, M, Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, Prince Consort Rd, London SW7 2BZ, England TI - The European Large-Area ISO Survey (ELAIS): the final band-merged catalogue AB - We present the final band-merged European Large-Area ISO Survey (ELAIS) Catalogue at 6.7, 15, 90 and 175 mum, and the associated data at U, g', r', i', Z, J, H, K and 20 cm. The origin of the survey, infrared and radio observations, data-reduction and optical identifications are briefly reviewed, and a summary of the area covered and the completeness limit for each infrared band is given. A detailed discussion of the band-merging and optical association strategy is given. The total Catalogue consists of 3762 sources. 23 per cent of the 15-mum sources and 75 per cent of the 6.7-mum sources are stars. For extragalactic sources observed in three or more infrared bands, colour-colour diagrams are presented and discussed in terms of the contributing infrared populations. Spectral energy distributions (SEDs) are shown for selected sources and compared with cirrus, M82 and Arp220 starburst, and active galactic nuclei (AGN) dust torus models. Spectroscopic redshifts are tabulated, where available. For the N1 and N2 areas, the Isaac Newton Telescope ugriz Wide Field Survey permits photometric redshifts to be estimated for galaxies and quasars. These agree well with the spectroscopic redshifts, within the uncertainty of the photometric method [similar to10 per cent in (1 + z) for galaxies]. The redshift distribution is given for selected ELAIS bands and colour-redshift diagrams are discussed. There is a high proportion of ultraluminous infrared galaxies (log(10) of 1-1000 mum luminosity L-ir > 12.22) in the ELAIS Catalogue (14 per cent of 15-mum galaxies with known z), many with Arp220-like SEDs. 10 per cent of the 15-mum sources are genuine optically blank fields to r' = 24: these must have very high infrared-to-optical ratios and probably have z > 0.6, so are high-luminosity dusty starbursts or Type 2 AGN. Nine hyperluminous infrared galaxies (L-ir > 13.22) and nine extremely red objects (EROs) (r - K > 6) are found in the survey. The latter are interpreted as ultraluminous dusty infrared galaxies at z similar to 1. The large numbers of ultraluminous galaxies imply very strong evolution in the star formation rate between z = 0 and 1. There is also a surprisingly large population of luminous (L-ir > 11.5), cool (cirrus-type SEDs) galaxies, with L-ir L-opt > 0, implying A(V) > 1 MH - Canada MH - Chile MH - Cyprus MH - Denmark MH - United Kingdom MH - Finland MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Puebla MH - Netherlands MH - Spain MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 50 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000222423400016 L2 - stars : formation;galaxies : evolution;galaxies : starburst;cosmology : observations;infrared : galaxies;HUBBLE-DEEP-FIELD; EXTRAGALACTIC SOURCE COUNTS; X-RAY SURVEY; ACTIVE GALACTIC NUCLEI; STAR-FORMATION HISTORY; 170 MU-M; DATA REDUCTION; FORMATION RATES; SOUTHERN FIELD; HIGH-REDSHIFT SO - Monthly Notices of the Royal Astronomical Society 2004 ;351(4):1290-1306 12310 UI - 4483 AU - Rowden A AU - Robertson A AU - Allnutt T AU - Heredia S AU - Williams-Linera G AU - Newton AC AD - Bournemouth Univ, Sch Conservat Sci, Poole BH12 5BB, Dorset, EnglandUniv Edinburgh, Inst Ecol & Resource Management, Edinburgh EH9 3JU, Midlothian, ScotlandInst Ecol AC, Xalapa 91000, Veracruz, MexicoNewton, AC, Bournemouth Univ, Sch Conservat Sci, Poole BH12 5BB, Dorset, England TI - Conservation genetics of Mexican beech, Fagus grandifolia var. mexicana AB - Fagus grandifolia var. mexicana ( Fagaceae) is a Mexican endemic tree, currently threatened with extinction. In order to assess the level and structure of genetic variation in four remaining populations, leaf samples were analysed using random amplified polymorphic DNA ( RAPD) and cpDNA PCR-RFLP markers. A sample of the more widespread congener, F. grandifolia var. grandifolia from the USA was also analysed for comparison. Thirty-three polymorphic RAPD bands were produced using 18 10-mer primers. AMOVA of RAPD data indicated significant ( P < 0.002) population differentiation, with 15.6% of variation recorded between Mexican populations. PCR-RFLP analysis enabled three cpDNA haplotypes to be identified, denoted types A, B, and C. Types A and B were each restricted to an individual Mexican population, whereas Type C was fixed for two Mexican populations, and the population from the USA. Within-population genetic variation, quantified as percentage polymorphic bands, Shannon's Diversity Index and Nei's gene diversity measure, was found to be lower in Mexican populations than in that from the USA, and was positively related to population size. These results suggest that an unexpectedly high degree of genetic variation exists within Mexican beech, and this variation should be considered in developing the conservation strategy that is urgently required if extinction of this taxon is to be prevented MH - United Kingdom MH - Mexico|Veracruz PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Biodiversity Conservation;Genetics & Heredity U5 - J;Article AV - English IS - 1566-0621 UR - ISI:000223770700005 L2 - cpDNA;Fagus grandifolia var. mexicana;genetic variation;Mexican beech;PCR-RFLP;RAPD;CHLOROPLAST DNA; UNIVERSAL PRIMERS; NONCODING REGIONS; SYLVATICA L; POPULATIONS; DIVERSITY; RAPD; MITOCHONDRIAL; PHYLOGEOGRAPHY; AMPLIFICATION SO - Conservation Genetics 2004 ;5(4):475-484 12311 UI - 6306 AU - Rowsey JJ AU - ias-Rodriguez Y AU - Cukrowski C AD - St Lukes Cataract & Laser Inst, Dept Cornea & External Dis, Tarpon Springs, FL 34688, USAInst Tecnol & Estudios Super Monterrey, Dept Ophthalmol, Monterrey, NL, MexicoRowsey, JJ, St Lukes Cataract & Laser Inst, Dept Cornea & External Dis, 43309 US Hwy 19 N,POB 5000, Tarpon Springs, FL 34688 USA TI - A new method for measuring progression in patients with ocular cicatricial pemphigoid AB - Objectives: To describe a method to measure the progression of ocular cicatricial pemphigoid and to compare its facility with traditional methods used to measure the progression of the disease. Methods: The proposed method consists of measuring (in millimeters) the total relative inferior conjunctival surface available in 3 gaze positions. This method was used to monitor 7 eyes of 4 patients with ocular cicatricial pemphigoid over 2 years. The changes in the conjunctival measurements from baseline were compared with the changes documented by traditional methods. Results: During the study, 2 eyes remained stable (changes, <3 mm), 2 had a decrease of 10 mm or more, and 3 had a change in measurements between 4 and 9 mm. With the proposed method, we demonstrated the detection of more subtle changes in the conjunctiva of all patients. Patients who had changes between 4 and 9 mm easily underwent staging by the traditional systems when the new technique was used as a reference. Conclusion: The proposed method offers an objective variable that can be used in consecutive visits to detect subtle progression or disease control in patients with ocular cicatricial pemphigoid MH - USA MH - Mexico|Nuevo Leon PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 1 U4 - Ophthalmology U5 - J;Article AV - English IS - 0003-9950 UR - ISI:000188776900004 L2 - DISEASE; CYCLOPHOSPHAMIDE; AUTOANTIBODIES; MANIFESTATIONS; DIAGNOSIS; LAMININ-5; SPECTRUM; SUBUNITS SO - Archives of Ophthalmology 2004 ;122(2):179-184 12312 UI - 6642 AU - Royse DJ AU - Rhodes TW AU - Ohga S AU - Sanchez JE AD - Penn State Univ, Muscle Res Ctr, Dept Plant Pathol, Buckhout Lab 316, University Pk, PA 16802, USAKyushu Univ, Fac Agr, Fukuoka 8112415, JapanEl Cogegio Frontera Sur, Tapachula 30700, Chiapas, MexicoRoyse, DJ, Penn State Univ, Muscle Res Ctr, Dept Plant Pathol, Buckhout Lab 316, University Pk, PA 16802 USA TI - Yield, mushroom size and time to production of Pleurotus cornucopiae (oyster mushroom) grown on switch grass substrate spawned and supplemented at various rates AB - To find a cost effective alternative substrate, Pleurotus cornucopiae 608 (yellow basidiomata) was grown on: (1) chopped, pasteurized switch grass (Panicum virgatum, 99%) with 1% ground limestone and (2) a mixture of pasteurized cottonseed hulls (75% dry wt.), 24% chopped wheat straw, and 1% ground limestone (all ingredients wt./wt.). The substrates were spawned at various levels (2.5%. 3.75% or 5% wet wt., crop 1) and non-supplemented or supplemented with commercial delayed release nutrient (Campbell's S-41) at various levels (0%, 1.5%, 3%, 4.5%, 6%, 7.5% and 9% dry wt., crop 11). Maximum yield (weight of fresh mushrooms harvested at maturity) was obtained on cottonseed hull/wheat straw substrate at a 3.75-5% spawn level and 6% S-41 supplement. On switch grass substrate, increasing spawn levels and supplement levels stimulated yields in a linear fashion. However, maximum yields were only 46% or less for those of similar treatments on cottonseed hull/wheat straw substrate. Yields were three times higher on switch grass that was harvested after the grass had senesced (winter; beige color) compared to material that was harvested when the grass was green (summer; time of flowering). Additional physical processing of the material, such as milling, may improve yield potential of this material. (C) 2003 Elsevier Ltd. All rights reserved MH - Japan MH - Mexico|Chiapas MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Agricultural Engineering;Biotechnology & Applied Microbiology;Energy & Fuels U5 - J;Article AV - English IS - 0960-8524 UR - ISI:000187446700007 L2 - DELAYED-RELEASE NUTRIENT; SAJOR-CAJU SO - Bioresource Technology 2004 ;91(1):85-91 12313 UI - 4322 AU - rredondo-Garcia JL AU - Figueroa-Damian R AU - Rosas A AU - Jauregui A AU - Corral M AU - Costa A AU - Merlos RM AU - Rios-Fabra A AU - mabile-Cuevas CF AU - Hernandez-Oliva GM AU - Olguin J AU - Cardenosa-Guerra O AD - Fdn Lusara, Mexico City 08930, DF, MexicoInst Nacl Perinatol, Mexico City, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoHosp Clin Parque, Chihuahua, MexicoBayer Mexico, Direcc Med, Mexico City, DF, MexicoHosp Eugenio Espejo, Quito, EcuadorHosp Sur, Quito, EcuadorHosp Maternidad, San Salvador, El SalvadorHosp Vargas Caracas, Caracas, VenezuelaQuim Farmaceut Bayer, Barcelona, SpainAmabile-Cuevas, CF, Fdn Lusara, Apartado Postal 102-006, Mexico City 08930, DF, Mexico TI - Comparison of short-term treatment regimen of ciprofloxacin versus long-term treatment regimens of trimethoprim/sulfamethoxazole or norfloxacin for uncomplicated lower urinary tract infections: a randomized, multicentre, open-label, prospective study AB - Objective: To compare the bacteriological and clinical efficacy of three treatments for uncomplicated cystitis in ambulatory pre-menopausal women: ciprofloxacin 250 mg orally twice daily for 3 days, trimethoprim/sulfamethoxazole 160/800 mg orally twice daily for 7 days, and norfloxacin 400 mg orally twice daily for 7 days. Materials and methods: A total of 455 women were randomly assigned to three treatment groups: 151 received ciprofloxacin, 150 received trimethoprim/sulfamethoxazole, and 154 received norfloxacin. Bacteriological cure and clinical resolution were evaluated 5-9 days and 4-6 weeks after completion of treatment. Results: There was no significant difference among the three treatment groups: overall efficacy ranged from 78.5% for the trimethoprim/sulfamethoxazole group, to 84.5% for the ciprofloxacin group. The highest overall incidence of drug-related adverse effects occurred in the trimethoprim/sulfamethoxazole patients. Conclusions: These data indicate that a 3 day treatment with ciprofloxacin is at least as clinically and bacteriologically effective as 7 day treatments with trimethoprim/sulfamethoxazole and norfloxacin for uncomplicated lower urinary tract infections MH - Ecuador MH - El Salvador MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Spain MH - Venezuela PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Infectious Diseases;Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0305-7453 UR - ISI:000224207100024 L2 - fluoroquinolones;clinical trials;cystitis;Latin America;WOMEN SO - Journal of Antimicrobial Chemotherapy 2004 ;54(4):840-843 12314 UI - 4334 AU - rteaga-Larios F AU - Sheu EY AU - Perez E AD - Vanton Res Lab Inc, Lafayette, CA 94549, USAInst Mexicano Petr, Programa Ingn Mol, Mexico City 07720, DF, MexicoSheu, EY, Vanton Res Lab Inc, 7 Olde Creek Pl, Lafayette, CA 94549, USA TI - Asphaltene flocculation, precipitation, and Liesegang ring AB - Precipitations of Ratawi and Kuparuk asphaltene in toluene/heptane mixed solvents were investigated using a newly developed dripping test method. Precipitation of asphaltene solution at a critical heptane volume ratio can be readily identified. In addition, for the first time, a Liesegang-like phenomenon [Liesegang, R. E. Naturwiss. Wochenschr. 1896,11, 353] was observed for the Ratawi asphaltene system. Similar but less-profound Liesegang rings were observed for asphaltene derived from Kuparuk crude oils. Clear crossover and a diffusive hyperfine structure were observed in the Ratawi asphaltene precipitation pattern, whereas asphaltene derived from Kuparuk crude oil showed only marginal crossover phenomenon. The patterns of the rings from Ratawi asphaltene seem to fit the space law of the Liesegang pattern. Both the post-nucleation Ostwald-Prager process and the pre-nucleation spinonal decomposition phase separation process are possible precipitation mechanisms MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000223976800013 L2 - ORGANIC-SOLVENTS; REACTION FRONT; PATTERN-FORMATION; SURFACE-TENSION; AGGREGATION; SYSTEMS; TOLUENE; FILMS SO - Energy & Fuels 2004 ;18(5):1324-1328 12315 UI - 3880 AU - Rubio-Gonzalez C AU - Ocana JL AU - Gomez-Rosas G AU - Molpeceres C AU - Paredes M AU - Banderas A AU - Porro J AU - Morales M AD - Ctr Ingn & Desarrollo Ind, Queretaro 76130, Qro, MexicoUniv Politecn Madrid, ETSII, Dept Fis Aplicada & Ingn Ind, Madrid, SpainRubio-Gonzalez, C, Ctr Ingn & Desarrollo Ind, Pie Cuesta 702,Desarrollo San Pablo, Queretaro 76130, Qro, Mexico TI - Effect of laser shock processing on fatigue crack growth and fracture toughness of 6061-T6 aluminum alloy AB - Laser shock processing (LSP) or laser shock peening is a new technique for strengthening metals. This process induces a compressive residual stress field which increases fatigue crack initiation life and reduces fatigue crack growth rate. Specimens of 6061-T6 aluminum alloy are used in this investigation. A convergent lens is used to deliver 1.2J, 8 ns laser pulses by a Q-switch Nd:YAG laser, operating at 10 Hz. The pulses are focused to a diameter of 1.5 mm onto a water-immersed type aluminum samples. Effect of pulse density in the residual stress field is evaluated. Residual stress distribution as a function of depth is assessed by the hole drilling method. It is observed that the higher the pulse density the larger the zone size with compressive residual stress. Densities of 900, 1350 and 2500 pulses/cm(2) with infrared (1064 nm) radiation are used. Pre-cracked compact tension specimens were subjected to LSP process and then tested under cyclic loading with R = 0.1. Fatigue crack growth rate is determined and the effect of LSP process parameters is evaluated. Fatigue crack growth rate is compared in specimens with and without LSP process. In addition fracture toughness is determined in specimens with and without LSP treatment. It is observed that LSP reduces fatigue crack growth and increases fracture toughness in the 6061-T6 aluminum alloy. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Queretaro MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 9 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000225127800035 L2 - fatigue test;laser shock processing;residual stress;BEHAVIOR SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;386(1-2):291-295 12316 UI - 5166 AU - Rudino-Pinera E AU - Schwarz-Linek U AU - Potts JR AU - Garman EF AD - Univ Oxford, Dept Biochem, Oxford OX1 3QU, EnglandUniv Nacl Autonoma Mexico, Inst Biotecnol, Dept Med Mol & Bioproc, Cuernavaca 62271, Morelos, MexicoRudino-Pinera, E, Univ Oxford, Dept Biochem, S Parks Rd, Oxford OX1 3QU, England TI - Twinned or not twinned, that is the question: crystallization and preliminary crystallographic analysis of the (2)F1(3)F1 module pair of human fibronectin AB - Human fibronectin (Fn) is a large multidomain protein found in the extracellular matrix and plasma. It is involved in many cellular processes, including cell adhesion and migration during embryogenesis and wound healing. The ability to bind Fn is a characteristic that has been demonstrated for a number of pathogens. For Staphylococcus aureus and Streptococcus pyogenes in particular, Fn-binding bacterial proteins (FnBPs) have been shown to mediate not only bacterial adhesion to host cells but also the uptake of bacteria by the cells. FnBPs interact with the amino-terminal region of Fn, where five type I ((1-5)F1) Fn modules are located. Although the structures of two F1 module pairs have been determined by NMR, no X-ray structures have been reported. To explore the conformational interactions between modules and the binding properties of FnBPs, the (2)F1(3)F1 module pair was crystallized using the vapour-diffusion method at 298 K. 12 X-ray diffraction data sets have been collected: six on an in-house rotating anode ( three native, one Pt derivative and two peptide-bound) and six at synchrotron-radiation sources ( two native and four derivative). Following analysis of these data, some of which have very high multiplicity ( up to 50), probable space-group assignments were made ( P42(1)2, P4(1)2(1)2 or P4(3)2(1)2) and the possibly twinned nature of the crystals was investigated using six different tests. The results presented here suggest that the crystals are not twinned MH - United Kingdom MH - Mexico|Morelos PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 4 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biophysics;Crystallography U5 - J;Article AV - English IS - 0907-4449 UR - ISI:000222177600032 L2 - CRYSTAL-STRUCTURE; MOLECULAR REPLACEMENT; PROTEINS; ANGSTROM; DOMAINS SO - Acta Crystallographica Section D-Biological Crystallography 2004 ;60():1341-1345 12317 UI - 2894 AU - Ruiz-Arguelles GJ AU - Gomez-Almaguer D AU - Gomez-Rangel JD AU - Vela-Ojeda J AU - Kardus A AU - Cantu-Rodriguez OG AU - Jaime-Perez JC AU - Gonzalez-Llano O AU - Herrera-Garza JL AD - Univ Autonoma Neuvo Leon, Ctr Hematol & Med Interna Puebla, Leon, SpainUniv Autonoma Neuvo Leon, Lab Clin Puebla, Leon, SpainUniv Autonoma Neuvo Leon, Hosp Univ Monterrey, Leon, SpainInst Mexicano Seguro Social, Ctr Med Raza, Mexico City, DF, MexicoClin Amer, Inst Cancerol, Medellin, Colombia TI - Allogeneic hematopoietic stem cell transplantation with nonmyeloablative conditioning in patients with myeloid leukemias: Results of a prospective study of the Latin American Cooperative Onco Hematology Group (LACOHG) MH - Colombia MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000225127701480 SO - Blood 2004 ;104(11):373B-373B 12318 UI - 6088 AU - Ruiz-Cabrera MA AU - Gou P AU - Foucat L AU - Renou JP AU - Daudin JD AD - Ctr Tecnol Carn, Unitat Tecnol Proc, Inst Recerca & Tecnol Agroalimentaries, E-17121 Monells, Girona, SpainUniv Autonoma San Luis Potosi, Fac Ciencias Quim, San Luis Potosi 78210, MexicoInst Natl Rech Agron, Clermont Ferrand, FranceGou, P, Ctr Tecnol Carn, Unitat Tecnol Proc, Inst Recerca & Tecnol Agroalimentaries, Granja Camps & Armet, E-17121 Monells, Girona, Spain TI - Water transfer analysis in pork meat supported by NMR imaging AB - NMR proton density imaging was used to study isothermal and unidirectional drying of pork semi membranosus muscle samples at temperatures of 12, 16 and 20 degreesC. An independent calibration of the transversal relaxation time T-2 as a function of the moisture content was carried out to convert the signal amplitude into moisture content. Due to spatial heterogeneity in drying, 2D images were needed to assess the evolution of 1D moisture profiles. The relationship between the effective water diffusivity (D) was calculated in function of water content (X) using the Boltzman transformation which needs no a priori on the relationship D = f(X); the effect of lipid content, temperature and fibre direction on this relationship were also studied. In all cases a decrease in water content brought about a decrease in D. A slight increase in lipid content led to a dramatic decrease in D. The fibre direction relative to water movement had a negligible effect. No significative differences in D between the three temperatures were observed, due to variability in the chemical composition of the samples. (C) 2003 Elsevier Ltd. All rights reserved MH - France MH - Mexico|San Luis Potosi MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 11 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0309-1740 UR - ISI:000220008600022 L2 - water diffusivity;meat;shrinkage;NMR;mass transfer;TRANSIENT MOISTURE PROFILES; NONDESTRUCTIVE MEASUREMENT; DIFFUSIVITY; PASTA; KINETICS; CORN; HAM SO - Meat Science 2004 ;67(1):169-178 12319 UI - 4314 AU - Ruiz-Cooley RI AU - Gendron D AU - Aguiniga S AU - Mesnick S AU - Carriquiry JD AD - Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja California, MexicoNOAA, Fisheries, SW Fisheries Sci Ctr, La Jolla, CA 92037, USAUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoRuiz-Cooley, RI, Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Apartado Postal 592, La Paz 23000, Baja California, Mexico TI - Trophic relationships between sperm whales and jumbo squid using stable isotopes of C and N AB - The trophic position and the predator-prey relationship between the sperm whale Physeter macrocephalus and the jumbo squid Dosidicus gigas were examined by measuring stable isotope ratios of carbon and nitrogen. Skin samples of sperm whales and muscle samples of small and large jumbo squid were collected between 1996 and 1999 in the Gulf of California. Gender determination through molecular analysis and field identification of size were used to identify adult male, female and immature male sperm whales. The stable isotope ratios of C and N of females and immature males were significantly different from those of adult male sperm whales; however, between females and immature males they did not differ significantly. The delta(13)C and delta(15)N values of females and immature males were higher than large jumbo squid by 1.1parts per thousand. and 2.7parts per thousand, respectively, suggesting a predator-prey relationship between them. A low isotopic interannual variation among the years 1997 to 1999 was observed in the isotopic signature of females and males. Adult males exhibited a lower isotopic signature than females and immature males, and did not show a trophic relationship with D. gigas. We hypothesized that the stable isotopic signature of mature males reflected their diet from an earlier high-latitude feeding ground. This study shows that stable isotope analysis of sloughed skin samples from free-ranging sperm whales can be an alternative method to stomach content and fecal analyses for evaluating trophic relationships MH - Mexico|Baja California MH - USA PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 11 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000224095900022 L2 - trophic relationships;trophic position;stable isotopes;sperm whales;jumbo squid;cetaceans;GULF-OF-CALIFORNIA; PHYSETER-MACROCEPHALUS; DOSIDICUS-GIGAS; MARINE MAMMALS; FOOD WEB; NITROGEN ISOTOPES; SOUTHEAST PACIFIC; CARBON ISOTOPES; FEEDING SUCCESS; DIET SO - Marine Ecology-Progress Series 2004 ;277():275-283 12320 UI - 5441 AU - Ruiz-Fernandez AC AU - Paez-Osuna F AU - Urrutia-Fucugauchi J AU - Preda M AU - Rehault I AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mazatlan 82040, MexicoUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Quebec, Montreal, PQ H2X 3Y7, CanadaRuiz-Fernandez, AC, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Calz Joel Montes Camarena S-N, Mazatlan 82040, Mexico TI - Historical trace metal fluxes in the Mexico City Metropolitan Zone as evidenced by a sedimentary record from the Espejo de los Lirios lake AB - The accumulation of selected trace metals (Ag, Cd, Co, Cr, Cu, Hg, Ni, Pb, V and Zn) was studied in a sediment core collected at Espejo de los Lirios lake, a precipitation-dominated seepage lake in Northern Mexico City Metropolitan Zone (MCMZ). A Pb-210-derived chronology, obtained from the same core, was used to reconstruct the historical metal fluxes at the site, allowing evaluation of the impact of environmental changes promoted by the development of the City during the last similar to125 years. The highest levels of metal enrichment above natural concentration levels (NCL) in the sediments from Espejo de los Lirios lake were found for Ag and Pb (similar to250%) as well as a slight enrichment for Cd (55%), Cr (84%), Co (20%), Cu (60%), Hg (47%), Ni (45%), V (59%) and Zn (66%). Fluxes of trace metals appeared to have noticeably increased from the last 45 years showing the maximum increments for Cd, Co, Cr, Ni, V and Zn during the 1980's ( 9 to 13 fold natural fluxes), for Ag and Cu (17 and 12 fold, respectively) during the 1990's and for Hg and Pb (2 and 13 fold) during the middle 1970's. Low levels of metal enrichment observed have evidenced that the most conspicuous consequences of the expansive growth of this area of the MCMZ, are mostly related to deforestation and erosion of the surrounding areas, rather than to trace metal pollution. Based on PCA, it can be assumed that atmospheric deposition, weathering of bedrock and soil within the watershed and authigenic production, are the most important processes that explain the trace metal distribution in the site MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Sinaloa PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Analytical;Environmental Sciences U5 - J;Article AV - English IS - 1464-0325 UR - ISI:000221507000016 L2 - ATMOSPHERIC DEPOSITION; MARINE-SEDIMENTS; AEGEAN SEA; CONTAMINATION; POLLUTION; LEAD; BAY; RECONSTRUCTION; GASOLINE; ISOTOPES SO - Journal of Environmental Monitoring 2004 ;6(5):473-480 12321 UI - 4204 AU - Ruiz-Leon J AU - Sapiens AJ AU - Celikovsky S AU - Torres JAM AD - IPN, CINVESTAV, Unidad Guadalajara, Guadalajara 44550, Jalisco, MexicoAcad Sci Czech Republ, Inst Informat Theory & Automat, CR-18208 Prague 8, Czech RepublicDept Automat Control, Mexico City 07300, DF, MexicoRuiz-Leon, J, IPN, CINVESTAV, Unidad Guadalajara, POB 31-438,Plaza Luna, Guadalajara 44550, Jalisco, Mexico TI - Decoupling with stability: Application to the real time control of a water storing plant AB - In this paper, results on decoupling with stability are applied to the real-time control of a water storing plant. The conditions of decoupling with stability are verified on the approximate linear model of the system, and a decoupling state feedback providing pole assignment is designed. The state feedback controller achieves input-output decoupling with stability, allowing controlling the levels of the water in the tanks independently. Simulation and experimental results are also presented showing a good performance of the designed controller MH - Czech Republic MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - TAIPEI: CHINESE AUTOMATIC CONTROL SOC RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems U5 - J;Article AV - English IS - 1561-8625 UR - ISI:000224403500010 L2 - linear multivariable systems;decoupling with stability;real time control;water storing plant;SYSTEMS; DESIGN SO - Asian Journal of Control 2004 ;6(3):415-420 12322 UI - 3909 AU - Ruiz-Medrano R AU - Xoconostle-Cazares B AU - Kragler F AD - IPN, CINVESTAV, Dept Biotechnol & Bioengn, Mexico City 07360, DF, MexicoUniv Vienna, Vienna Bioctr, Ludwig Boltzmann Res Stn, A-1030 Vienna, AustriaMax F Perutz Labs, Inst Biochem, A-1030 Vienna, AustriaKragler, F, IPN, CINVESTAV, Dept Biotechnol & Bioengn, Mexico City 07360, DF, Mexico TI - The plasmodesmatal transport pathway for homoeotic proteins, silencing signals and viruses AB - Non-cell-autonomous signals in the form of microRNAs and transcription factors could have important developmental functions. Plasmodesmata (PD) form a cytoplasmic network throughout the plant body and provide the means of symplasmic cell-to-cell transport in plants. Homeodomain transcription factors, small RNA molecules and viral genomic information move selectively to adjacent cells via PD microchannels. Tissue-specific expression studies of non-cell-autonomous transcription factors and RNA molecules have confirmed that their intercellular transport is a highly regulated process, which depends on the tissue, developmental stage and nature of the transported macromolecule. We have known for some time that gene-silencing signals spread both locally from cell to cell and across long distances following the source to sink transition. Recent work has provided evidence that small single-stranded silencing-induced RNAs and microRNA molecules are present in the phloem transport system of different plant species. Further, recent evidence has confirmed that the transport of silencing RNA via PD is a regulated and active process, and that an amplification-relay mechanism is in place for the long-distance spread of silencing signals MH - Austria MH - Mexico|Distrito Federal PB - LONDON: CURRENT BIOLOGY LTD RP - NOT IN FILE U3 - TC 17 U4 - Plant Sciences U5 - J;Review AV - English IS - 1369-5266 UR - ISI:000225080700006 L2 - CELL-TO-CELL; GREEN FLUORESCENT PROTEIN; LONG-DISTANCE MOVEMENT; SHOOT APICAL MERISTEM; TOBACCO-MOSAIC-VIRUS; DEVELOPMENTAL REGULATION; SELECTIVE TRAFFICKING; SYMPLASMIC FIELD; ARABIDOPSIS ROOT; VIRAL MOVEMENT SO - Current Opinion in Plant Biology 2004 ;7(6):641-650 12323 UI - 5785 AU - Ruiz-Morales JA AU - Vargas-Alarcon G AU - Flores-Villanueva PO AU - Villarreal-Garza C AU - Hernandez-Pacheco G AU - Yamamoto-Furusho JK AU - Rodriguez-Perez JM AU - Perez-Hernandez N AU - Rull M AU - Cardiel MH AU - Granados J AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoDana Farber Canc Inst, Dept Canc Immunol & AIDS, Boston, MA 02115, USAInst Nacl Cardiol, Cellular Sect Biol, Dept Physiol, Ignacio Chavez, Mexico City, DF, MexicoGranados, J, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - HLA-DRB1 alleles encoding the "Shared epitope" are associated with susceptibility to developing rheumatoid arthritis whereas HLA-DRB1 alleles encoding an aspartic acid at position 70 of the beta-chain are protective in Mexican mestizos AB - The risk to develop rheumatoid arthritis (RA) has been associated with the presence of HLA-DRB1 alleles encoding the "shared epitope" (SE). Additionally, HLA-DRB1 alleles encoding an aspartic acid at position 70 (D70+) have been associated with protection against the development of RA. In this study we tested the association between either SE or D70+ and rheumatoid arthritis in Mexican Mestizos. We included 84 unrelated Mexican Mestizos patients with RA and 99 unrelated healthy controls. The HLA-typing was performed by PCR-SSO and PCR-SSP. We used the chi-squared test to detect differences inproportions of individuals carrying at least one SE or D70+ between patients and controls. We found that the proportion of individuals carrying at least one HLA-DRBI allele encoding the SE was significantly increased in RA cases as compared to controls (pc = 0.0004, OR = 4.1, 95% CI = 2.2-7.7). The most frequently occurring allele was HLA-DRB1*0404 (0.161 vs 0.045). Moreover, we observed a significantly increased proportion of HLA-DRB1 SE + cases with RF titers above the median (p = 0.005). Conversely, the proportion of individuals carrying at least one HLA-DRB1 allele encoding the D70+ was significantly decreased (p(c) = 0.004, OR = 0.4, 95% CI 0.2-0.7) among RA patients compared with controls. In conclusion, the SE is associated with RA in Mexican Mestizos as well as with the highest titers of RF. (C) American Society for Histocompatibility and Immunogenetics, 2004. Published by Elsevier Inc MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 11 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000220685700010 L2 - HLA-DR; EXTRAARTICULAR MANIFESTATIONS; GENE-FREQUENCIES; ADMIXTURE; REGION; DRB1-ASTERISK-0405; EXPRESSION; POPULATION; DISABILITY; HLA-DQA1 SO - Human Immunology 2004 ;65(3):262-269 12324 UI - 2652 AU - Ruiz-Perez M AU - Belcher B AU - Achdiawan R AU - Alexiades M AU - Aubertin C AU - Caballero J AU - Campbell B AU - Clement C AU - Cunningham T AU - Fantini R AU - de Foresta H AU - Fernandez CG AU - Gautam KH AU - Martinez PH AU - de Jong W AU - Kusters K AU - Kutty MG AU - Lopez C AU - Fu MY AU - Alfaro MAM AU - Nair TKR AU - Ndoye O AU - Ocampo R AU - Rai N AU - Ricker M AU - Schreckenberg K AU - Shackleton S AU - Shanley P AU - Sunderland T AU - Youn YC AD - Univ Autonoma Madrid, E-28049 Madrid, SpainUniv Kent, Canterbury, Kent, EnglandIRD, Orleans, FranceUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Fed Santa Catarina, BR-88040900 Florianopolis, SC, BrazilHokkaido Univ, Sapporo, Hokkaido 060, JapanInst Nacl Antropol & Hist, Mexico City, DF, MexicoChinese Acad Forestry, Beijing, Peoples R ChinaOverseas Dev Inst, London, EnglandRhodes Univ, ZA-6140 Grahamstown, South AfricaSeoul Natl Univ, Seoul 151, South KoreaRuiz-Perez, M, Univ Autonoma Madrid, E-28049 Madrid, Spain TI - Markets drive the specialization strategies of forest peoples AB - Engagement in the market changes the opportunities and strategies of forest-related peoples. Efforts to support rural development need to better understand the potential importance of markets and the way people respond to them. To this end, we compared 61 case studies of the commercial production and trade of nontimber forest products from Asia, Africa, and Latin America. The results show that product use is shaped by local markets and institutions, resource abundance, and the relative level of development. Larger regional patterns are also important. High-value products tend to be managed intensively by specialized producers and yield substantially higher incomes than those generated by the less specialized producers of less managed, low-value products. We conclude that commercial trade drives a process of intensified production and household specialization among forest peoples MH - Brazil MH - United Kingdom MH - France MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China MH - South Africa MH - South Korea MH - Spain PB - WOLFVILLE: RESILIENCE ALLIANCE RP - NOT IN FILE U3 - TC 6 U4 - Ecology U5 - J;Article AV - English IS - 1195-5449 UR - ISI:000228062200003 L2 - TROPICAL FORESTS; VALUATION SO - Ecology and Society 2004 ;9(2): 12325 UI - 5565 AU - Ruiz-Vega D AU - Messina AR AU - Pavella M AD - IPN, SEPI ESIME Zacatenco, Grad Program Elect Engn, Mexico City 07738, DF, MexicoUniv Liege, Dept Elect Elect & Comp Engn, B-4000 Liege, BelgiumIPN, CINVESTAV, Grad Program Elect Engn, Guadalajara 45090, Jalisco, MexicoRuiz-Vega, D, IPN, SEPI ESIME Zacatenco, Grad Program Elect Engn, Mexico City 07738, DF, Mexico TI - Online assessment and control of transient oscillations damping AB - A new approach to online assessment and control of transient oscillations is proposed. It relies on coupling Prony analysis And the SIME transient stability method, with the twofold objective: on one hand, to improve Prony's applicability and reliability, and on the other hand, to design generation rescheduling patterns able to enhance the damping of poorly damped oscillations and/or stabilize them. Simulations performed on two different systems illustrate the technique and show main features: accuracy, ability to uncover and assess the influence of system machines' generation on damping, and compatibility with real-time requirements. Comparison of the results obtained by the proposed approach with conventional eigenanalysis techniques is provided. Additional method's interesting byproducts are also discussed MH - Belgium MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8950 UR - ISI:000221283300044 L2 - control of poorly damped oscillations;damping assessment;modal identification;Prony analysis;SIME method;transient stability;POWER-SYSTEM RESPONSE; PRONY ANALYSIS SO - Ieee Transactions on Power Systems 2004 ;19(2):1038-1047 12326 UI - 4974 AU - Ruiz RFC AU - Heredia GP AU - Arias RM AU - Saikawa M AU - Minter DW AU - Stadler M AU - Guarro T AU - Decock C AD - Inst Invest Fundamentales Agr Trop Alejandro de H, Havana 17200, CubaInst Ecol, Xalapa, Veracruz, MexicoTokyo Gakugei Univ, Dept Biol, Koganei, Tokyo 184, JapanCABI Biosci, Surrey TW20 9TY, EnglandBayer Hlth Care, PH R EU ETI, Nat Wissensch Verein & Fuhlrott Museum, Mycol Herbarium Wuppertal, D-42096 Wuppertal, GermanyUniv Rovira & Virgili, Fac Med 1, Unitat Microbiol, E-43201 Reus, SpainUniv Catholique Louvain, B-1348 Louvain, BelgiumRuiz, RFC, Inst Invest Fundamentales Agr Trop Alejandro de H, Calle 1 Esq 2, Havana 17200, Cuba TI - Two new Hyphomycetes from rainforests of Mexico, and Briansuttonia, a new genus to accommodate Corynespora alternarioides AB - Corynespora aquatica anam. sp. nov. on decaying leaves of an unidentified plant submerged in a stream, and Solicorynespora sylvatica anam. sp. nov. on leaf litter, both found in tropical rainforests, are described and illustrated. Solicorynespora mulanjeensis comb. nov. is proposed, and a key to Solicorynespora species is provided. Briansuttonia gen. nov. is established to accommodate Corynespora alternarioides MH - Belgium MH - Cuba MH - United Kingdom MH - Germany MH - Japan MH - Mexico|Veracruz MH - Spain PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 1 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000222490400010 L2 - submerged leaves;systematics;tropical fungi SO - Mycotaxon 2004 ;89(2):297-305 12327 UI - 3627 AU - Rull J AU - Prokopy RJ AD - Inst Ecol, Xalpa 91070, Veracruz, MexicoUniv Massachusetts, Dept Entomol, Amherst, MA 01300, USARull, J, Inst Ecol, Xalpa 91070, Veracruz, Mexico TI - Host-finding and ovipositional-boring responses of apple maggot (Diptera : Tephritidae) to different apple genotypes AB - We studied relationships between adult apple maggot, Rhagoletis pomonella (Walsh), and apple genotypes in the field and laboratory by counting male and female flies trapped on unbaited sticky red spheres and by counting fruit punctures in choice tests. Six apple genotypes were chosen for both field and laboratory tests grouped into three categories of phenological development (early, mid, and late ripening). in the field, where comparisons were made over a 2-yr period in five commercial orchards, apple maggot trap captures tended to be aggregated on trees of certain genotypes rather than uniformly distributed. For early ripening genotypes, traps on Jersey Mac accumulated moderately high to high numbers of apple maggot during early and mid-season, whereas traps on Paula Red accumulated few flies during both periods. For mid-ripening genotypes, traps on Gala accumulated high numbers of apple maggot during early, mid-, and late season, whereas traps on McIntosh accumulated comparatively small numbers during all parts of the season. Fuji, a lateripening genotype, was among the preferred genotypes during mid- and late season, whereas Red Delicious, another late-ripening genotype, received high numbers of apple maggot during early and mid-season. In the lab, during early season, fruit of all genotypes except Red Delicious were accepted for boring in high proportions by caged apple maggot. During mid- and late season, fruit of Fuji and Red Delicious were accepted for boring in lower proportions than fruit of other genotypes. The degree to which apple genotypes were accepted for oviposition in the laboratory did not correspond with tree visitation rates in the field. Sugar content and pulp pressure of fruits of different genotypes also did not correspond with tree visitation rates. Our results suggest that the distribution of apple maggot in orchards is influenced by the tendency of flies to preferentially visit trees of particular apple genotypes. Preferences for apple genotypes seem to be independent of the ripening phenology, sugar content, and pulp pressure of fruit. We discuss the nature of such preferences and implications for an attract- and-kill approach to apple maggot control in commercial orchards MH - Mexico|Veracruz MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000225932500025 L2 - apple maggot;host finding;ovipositional boring;genotype;preference;RHAGOLETIS-POMONELLA DIPTERA; FRUIT-FLY DIPTERA; FLIES DIPTERA; VOLATILES; TRAPS; SUSCEPTIBILITY; BEHAVIOR; RACES; FIELD; IDENTIFICATION SO - Environmental Entomology 2004 ;33(6):1695-1702 12328 UI - 5732 AU - Rull J AU - Prokopy RJ AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoUniv Massachusetts, Dept Entomol, Amherst, MA 01003, USARull, J, Inst Ecol AC, Km 2-5,Carretera Antigua Coatepec, Xalapa 91000, Veracruz, Mexico TI - Revisiting within-tree trap positioning for apple maggot fly (Dipt., Tephritidae) behavioural control AB - Aiming to minimize visual competition between large red apples and red sphere traps from influencing effectiveness of traps for apple maggot fly (AMF) control, we compared AMF captures by red spheres in standard recommended position (no fruit within 15 cm), red spheres in similar position but with all fruit removed within a 30-cm radius (fruitless), red spheres with additional visual competition provided by three plastic red spheres hung 15 cm from sphere traps, and yellow panels. Traps were coated with adhesive, baited with synthetic fruit odour, and hung on trees of an apple cultivar bearing red fruit (Akeene) and trees of an apple cultivar bearing pale yellow fruit (Golden Delicious). On Akeene trees, red spheres in recommended position and fruitless red spheres caught more AMF than red spheres surrounded by plastic spheres and than yellow panels. Towards harvest, effectiveness of red spheres in recommended position decreased as reflectance of the surface of Akeene apples approached that of red spheres. By contrast, effectiveness of fruitless spheres increased over time. On Golden Delicious trees, fruitless spheres were the most effective, followed by spheres surrounded by uncoated plastic spheres and red spheres in recommended position. We conclude that removing all fruit within a 30-cm radius around red sphere traps results in similar or increased trap effectiveness relative to red spheres in recommended position MH - Mexico|Veracruz MH - USA PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 1439-0418 UR - ISI:000220855500006 L2 - trap position;visual competition;apple maggot;RHAGOLETIS-POMONELLA; FLIES; MANAGEMENT; ORCHARDS; ODOR SO - Journal of Applied Entomology 2004 ;128(3):195-199 12329 UI - 4893 AU - Ruperto N AU - Murray KJ AU - Gerloni V AU - Wulffraat N AU - de Oliveira SKF AU - Falcini F AU - Dolezalova P AU - Alessio M AU - Burgos-Vargas R AU - Corona F AU - Vesely R AU - Foster H AU - Davidson J AU - Zulian F AU - Asplin L AU - Baildam E AU - Consuegra JG AU - Ozdogan H AU - Saurenmann R AU - Joos R AU - Pistorio A AU - Woo P AU - Martini A AD - Univ Genoa, Pediat Rheumatol Int Trials Org, IRCCS G Gaslini Pediat Reumatol 2, I-16147 Genoa, ItalyPrincess Margaret Hosp Children, Perth, WA, AustraliaIst G Pini, Milan, ItalyWilhelmina Childrens Hosp, Utrecht, NetherlandsUniv Fed Rio de Janeiro, Rio De Janeiro, BrazilOsped Meyer, Florence, ItalyCharles Univ, Prague, Czech RepublicUniv Naples Federico II, Naples, ItalyGen Hosp, Mexico City, DF, MexicoClin Pediat II De Marchi, Milan, ItalyFac Hosp, Kosice, SlovakiaFreeman Rd Hosp, Newcastle Upon Tyne NE7 7DN, Tyne & Wear, EnglandRoyal Liverpool Childrens Hosp, Liverpool L7 7DG, Merseyside, EnglandClin Pediat 1, Padua, ItalyNatl Hosp, Oslo, NorwayChildrens Hosp, Manchester, Lancs, EnglandHosp Univ La Paz, Madrid, SpainCerrahpasa Tip Fak, Istanbul, TurkeyUniv Zurich, Childrens Hosp, Zurich, SwitzerlandUniv Ziekenhuis Ghent, Ghent, BelgiumGreat Ormond St Hosp Children, London WC1N 3JH, EnglandRuperto, N, Univ Genoa, Pediat Rheumatol Int Trials Org, IRCCS G Gaslini Pediat Reumatol 2, Largo Gaslini 5, I-16147 Genoa, Italy TI - A randomized trial of parenteral methotrexate comparing an intermediate dose with a higher dose in children with juvenile idiopathic arthritis who failed to respond to standard doses of methotrexate AB - Objective. To compare the safety and efficacy of parenteral methotrexate (MTX) at an intermediate dosage (15mg/m(2)/week) versus a higher dosage (30 mg/m(2)/ week) in patients with polyarticular-course juvenile idiopathic arthritis (JIA) who failed to improve while receiving standard dosages of MTX (8-12.5 mg/m(2)/ week). Methods. In the screening phase, 595 patients who were newly started on a standard dose of MTX were followed up for 6 months. Subsequently, the non-responders, defined according to the American College of Rheumatology (ACR) pediatric 30% improvement criteria (pediatric 30), were randomized to receive an intermediate dose or higher dose of parenteral MTX for an additional 6 months. Improvement in the screening and randomization phase was defined by the ACR pediatric 30 response, as well as by the 50% and 70% response levels (ACR pediatric 50 and ACR pediatric 70, respectively). Results. In the screening phase, after receiving standard doses of MTX, 430 patients (72%) improved according to the ACR pediatric 30, while 360 (61%) met the ACR pediatric 50 and 225 (38%) met the ACR pediatric 70; among these patients, 69 (12%) also met the definition of complete disease control. Of the 133 nonresponders, 80 were randomized to receive an intermediate dose, or higher dose of MTX. In the randomization phase, the ACR pediatric 30 response rate was 25 of 40 children (62.5%) in the intermediate-dose group versus 23 of 40 children (57.5%) in the higher-dose group. An ACR pediatric 50 response rate was attained by 23 patients (57.5%) receiving an intermediate dose versus 22 (55%) in the higher-dose group. An ACR pediatric 70 response rate was seen in 18 children (45%) receiving an intermediate dose versus 19 (47.5%) receiving a higher dose. Five children (12.5%) in the intermediate-dose group versus 4 (10%) receiving the higher dose of MTX also met the definition of complete disease control. None of the intergroup differences in response rate were significant. There were no significant differences in the frequency of adverse events or laboratory abnormalities between the 2 randomized groups. Conclusion. This study shows that the plateau of efficacy of MTX in JIA is reached with parenteral administration of 15 mg/m(2) /week and that a further increase in dosage is not associated with any additional therapeutic benefit. MTX should be administered for up to 9-12 months to appreciate its full therapeutic effect MH - Australia MH - Belgium MH - Brazil MH - Czech Republic MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal MH - Netherlands MH - Norway MH - Slovakia MH - Spain MH - Switzerland MH - Turkey PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 36 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000222820300018 L2 - RHEUMATOID-ARTHRITIS; INTRAMUSCULAR METHOTREXATE; PRELIMINARY DEFINITION; CLINICAL-TRIALS; PHARMACOKINETICS; IMPROVEMENT; TOXICITY; QUALITY SO - Arthritis and Rheumatism 2004 ;50(7):2191-2201 12330 UI - 5303 AU - Ruperto N AU - Buratti S AU - Duarte-Salazar C AU - Pistorio A AU - Reiff A AU - Bernstein B AU - Maldonado-Velazquez MR AU - Beristain-Manterola R AU - Maeno N AU - Takei S AU - Falcini F AU - Lepore L AU - Spencer CH AU - Pratsidou-Gertsi P AU - Martini A AU - Ravelli A AD - Univ Genoa, IRCCS G Gaslini, I-16147 Genoa, ItalyCtr Nacl Rehabil, Mexico City, DF, MexicoChildrens Hosp Los Angeles, Los Angeles, CA 90027, USAHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoHosp Gen Mexico City, Mexico City, DF, MexicoKagoshima Univ, Kagoshima 890, JapanOsped Meyer, Florence, ItalyIRCCS G Gaslini Burlo Garofalo, Trieste, ItalyLa Rabida Childrens Hosp & Res Ctr, Chicago, IL, USAAristotle Univ Thessaloniki, GR-54006 Thessaloniki, GreeceRavelli, A, Univ Genoa, IRCCS G Gaslini, Largo G Gaslini 5, I-16147 Genoa, Italy TI - Health-related quality of life in juvenile-onset systemic lupus erythematosus and its relationship to disease activity and damage AB - Objective. To assess the health-related quality of life (HRQL) of patients with juvenile-onset systemic lupus erythematosus (JSLE) and its relationship with disease activity and accumulated damage. Methods. In this cross-sectional study, HRQL was assessed using the Child Health Questionnaire (CHQ), disease activity using the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI), and accumulated damage using the Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI). Results. A total of 297 patients were included. The mean SD physical and psychosocial summary scores of the CHQ were 40.2 +/- 15.0 and 44.8 +/- 10.7, respectively. The most impaired CHQ subscales were global health, general health perceptions, and parent impact-emotional. The SLEDAI score was significantly correlated with both the physical summary score (r = -0.29, P < 0.0001) and psychosocial summary score (r = -0.259 P < 0.0001), whereas the SDI score was significantly correlated only with the physical summary score (r = -0.23, P = 0.0001). Conclusion. We found that patients with JSLE have significant impairment of their HRQL, particularly in the physical domain. HRQL may be affected by both disease activity and accumulated damage, particularly in the renal, central nervous, and musculoskeletal systems MH - Greece MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 14 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000221920200026 L2 - systemic lupus erythematosus;health-related quality of life;disease activity;organ damage;INDEX; CHILDREN SO - Arthritis & Rheumatism-Arthritis Care & Research 2004 ;51(3):458-464 12331 UI - 5022 AU - Rusanov AL AU - Belomoina NM AU - Tugushi DS AU - Likhachev DY AD - Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 119991, RussiaTbilisi State Univ, GE-380028 Tbilisi, Rep of GeorgiaUNAM, Mat Res Inst, Mexico City 04510, DF, MexicoRusanov, AL, Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Ul Vavilova 28, Moscow 119991, Russia TI - Synthesis of polyphenylquinoxalines using the reductive polyheterocyclization reaction AB - The reductive polyheterocyclization reaction was applied for preparing polyphenylquinoxalines based on mononuclear aromatic dinitrodiamines and 1,4-bis(phenylglyoxalyl)benzene. Polyphenylquinoxalines thus synthesized combine solubility in m-cresol with high heat resistance and thermal stability MH - Mexico|Distrito Federal MH - Rep of Georgia MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Polymer Science U5 - J;Article AV - English IS - 1560-0904 UR - ISI:000222403800005 L2 - POLYMERS SO - Polymer Science Series B 2004 ;46(5-6):139-141 12332 UI - 4920 AU - Saanchez D AU - Nieh JC AU - Henaut Y AU - Cruz L AU - Vandame R AD - Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Calif San Diego, Div Biol Sci, Sect Ecol Behav & Evolut, La Jolla, CA 92093, USAVandame, R, Colegio Frontera Sur, Carretera Antiguo Aeropuerto Km 2-5, Tapachula 30700, Chiapas, Mexico TI - High precision during food recruitment of experienced (reactivated) foragers in the stingless bee Scaptotrigona mexicana (Apidae, Meliponini) AB - Several studies have examined the existence of recruitment communication mechanisms in stingless bees. However, the spatial accuracy of location-specific recruitment has not been examined. Moreover, the location-specific recruitment of reactivated foragers, i.e., foragers that have previously experienced the same food source at a different location and time, has not been explicitly examined. However, such foragers may also play a significant role in colony foraging, particularly in small colonies. Here we report that reactivated Scaptotrigona mexicana foragers can recruit with high precision to a specific food location. The recruitment precision of reactivated foragers was evaluated by placing control feeders to the left and the right of the training feeder (direction-precision tests) and between the nest and the training feeder and beyond it (distance-precision tests). Reactivated foragers arrived at the correct location with high precision: 98.44% arrived at the training feeder in the direction trials (five-feeder fan-shaped array, accuracy of at least +/-6degrees of azimuth at 50 m from the nest), and 88.62% arrived at the training feeder in the distance trials (five-feeder linear array, accuracy of at least +/-5 m or +/-10% at 50 m from the nest). Thus, S. mexicana reactivated foragers can find the indicated food source at a specific distance and direction with high precision, higher than that shown by honeybees, Apis mellifera, which do not communicate food location at such close distances to the nest MH - Mexico|Chiapas MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-1042 UR - ISI:000222676800008 L2 - WORKERS HYMENOPTERA; COMMUNICATION; INFORMATION; LOCATION; PANAMICA SO - Naturwissenschaften 2004 ;91(7):346-349 12333 UI - 3455 AU - Saavedra JP AU - Sissom WD AD - Univ Michoacana, Lab Entomol Biol Socrates Cisneros Paz, Fac Biol, Morelia 58060, Michoacan, MexicoW Texas A&M Univ, Dept Life Earth & Environm Sci, WTAMU, Canyon, TX 79016, USASaavedra, JP, Univ Michoacana, Lab Entomol Biol Socrates Cisneros Paz, Fac Biol, Morelia 58060, Michoacan, Mexico TI - A new species of the genus Vaejovis (Scorpiones, Vaejovidae) endemic to the Balsas Basin of Michoacan, Mexico AB - A unique new species of the genus Vaejovis is described: V. cisnerosi from deciduous scrub forest in the Balsas Basin in Michoacan State, Mexico. Morphological characters, including the hemispermatophore of the holotype male, are illustrated. The closest relative of V. cisnerosi within the genus is unknown, but hemispermatophore morphology, tarsal setation, and trichobothrial patterns suggest close ties with the V. eusthenura, V. intrepidus and V. punctipalpi groups MH - Mexico|Michoacan MH - USA PB - NEW YORK: AMER ARACHNOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0161-8202 UR - ISI:000226334100007 L2 - scorpion;Vaejovis;taxonomy;Mexico;NITIDULUS GROUP SO - Journal of Arachnology 2004 ;32(3):539-544 12334 UI - 4900 AU - Sabath E AU - Meade P AU - Berkman J AU - de los Heros P AU - Moreno E AU - Bobadilla NA AU - Vazquez N AU - Ellison DH AU - Gamba G AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Mexico City 14000, DF, MexicoOregon Hlth Sci Univ, Dept Med, Div Nephrol & Hypertens, Portland, OR 97201, USAGamba, G, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mol Physiol Unit, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Pathophysiology of functional mutations of the thiazide-sensitive Na-Cl cotransporter in Gitelman disease AB - Most of the missense mutations that have been described in the human SLC12A3 gene encoding the thiazide-sensitive Na+-Cl- cotransporter (TSC, NCC, or NCCT), as the cause of Gitelman disease, block TSC function by interfering with normal protein processing and glycosylation. However, some mutations exhibit considerable activity. To investigate the pathogenesis of Gitelman disease mediated by such mutations and to gain insights into structure-function relationships on the cotransporter, five functional disease mutations were introduced into mouse TSC cDNA, and their expression was determined in Xenopus laevis oocytes. Western blot analysis revealed immunoreactive bands in all mutant TSCs that were undistinguishable from wild-type TSC. The activity profile was: wild-type TSC (100%) > G627V (66%) > R935Q (36%) = V995M (32%) > G610S (12%) > A585V (6%). Ion transport kinetics in all mutant clones were similar to wild-type TSC, except in G627V, in which a small but significant increase in affinity for extracellular Cl- was observed. In addition, G627V and G610S exhibited a small increase in metolazone affinity. The surface expression of wild-type and mutant TSCs was performed by laser-scanning confocal microscopy. All mutants exhibited a significant reduction in surface expression compared with wild-type TSC, with a profile similar to that observed in functional expression analysis. Our data show that biochemical and functional properties of the mutant TSCs are similar to wild-type TSC but that the surface expression is reduced, suggesting that these mutations impair the insertion of a functional protein into the plasma membrane. The small increase in Cl- and thiazide affinity in G610S and G627V suggests that the beginning of the COOH-terminal domain could be implicated in defining kinetic properties MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER PHYSIOLOGICAL SOC RP - NOT IN FILE U3 - TC 14 U4 - Physiology;Urology & Nephrology U5 - J;Article AV - English IS - 0363-6127 UR - ISI:000222835500005 L2 - distal tubule;salt reabsorption;structure;Na-Cl cotransporter;diuretics;BARTTERS-SYNDROME; NA+-K+-2CL(-) COTRANSPORTER; MOLECULAR PATHOGENESIS; HYPOKALEMIC ALKALOSIS; DISTAL TUBULES; BLOOD-PRESSURE; EXPRESSION; KIDNEY; GLYCOSYLATION; RECEPTOR SO - American Journal of Physiology-Renal Physiology 2004 ;287(2):F195-F203 12335 UI - 4080 AU - Sabino MA AU - Ajami D AU - Salih V AU - Nazhat SN AU - Vargas-Coronado R AU - Cauich-Rodriguez JV AU - Ginebra MP AD - Ctr Invest Cient Yucatan AC, Merida, Yucatan, MexicoUniv Politecn Catalunya, Dept Mat Sci & Met, Barcelona, SpainUniv Simon Bolivar, Grp Polimeros GPUSB,Dept Ciencia Mat, LAb Biotecnol, Dept Biol Celular, Caracas 1080A, VenezuelaUniv Coll London, Eastman Dent Inst, Div Biomat & Tissue Engn, London WC1X 8LD, EnglandCauich-Rodriguez, JV, Ctr Invest Cient Yucatan AC, Calle 43 130,Col Chuburna Hidalgo, Merida, Yucatan, Mexico TI - Physicochemical, mechanical, and biological properties of bone cements prepared with functionalized methacrylates AB - Bone cements prepared with methyl methacrylate (MMA) as a base monomer and either methacrylic acid (MAA) or diethyl amino ethyl methacrylate (DEAEMA) as comonomers were characterized in terms of curing behavior, mechanical properties, and their in vitro biocompatibility. The curing time and setting temperature were found to be composition dependent while the residual monomer was not greatly affected by the presence of either acidic or alkaline comonomers in the bone cements. For samples with MAA comonomer, a faster curing time and higher setting temperature, were observed when compared to the cement with DEAEMA comonomer. In terms of mechanical properties, the highest compressive strength was exhibited by formulations containing MAA, while the highest impact strength was shown by the formulations prepared with DEAEMA. There were no differences observed between the two formulations for tensile, shear, and bending strength values. Similarly, fatigue crack propagation studies did not reveal differences with the addition of either DEAEMA or MAA. No differences were observed in the initial number of attached primary rat femur osteoblasts on the different bone cements and positive controls. However, after 48 h there was a reduced proliferation in the cells grown on bone cements containing MAA MH - United Kingdom MH - Mexico|Yucatan MH - Spain MH - Venezuela PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0885-3282 UR - ISI:000224688000005 L2 - bone cements;methacrylic acid;diethyl amino ethyl methacrylate;mechanical properties;biocompatibility;osteoblasts;IN-VITRO; HYDROXYAPATITE SO - Journal of Biomaterials Applications 2004 ;19(2):147-161 12336 UI - 5071 AU - Sacco LM AU - Caulfield LE AU - Martinez H AD - Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD 21218, USAInst Mexicano Seguro Social, Mexico City, DF, Mexico TI - Infant crying behavior, perceived insufficient milk and infant feeding practices in Mexico MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602359 SO - Faseb Journal 2004 ;18(4):A489-A490 12337 UI - 3014 AU - Saenz-Rivera J AU - Sarath G AU - rredondo-Peter R AD - Univ Autonoma Estado Moelos, Fac Ciencias, Lab Biofis & Biol Mol, Cuernavaca 62210, Morelos, MexicoUniv Nebraska, Dept Agron & Hort, Wheat Sorghum Forage Unit, Lincoln, NE 68583, USAArredondo-Peter, R, Univ Autonoma Estado Moelos, Fac Ciencias, Lab Biofis & Biol Mol, Ave Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Modeling the tertiary structure of a maize (Zea mays ssp mays) non-symbiotic hemoglobin AB - The tertiary structure of a maize (Zea mays ssp. mays) non-symbiotic hemoglobin (Hbm) was modeled using computer tools and the known tertiary structure of rice Hb1 as a template. This method was tested by predicting the tertiary structure of soybean leghemoglobin a (Lba) using rice Hb1 as a template. The tertiary structures of the predicted and native Lba were similar, indicating that Our computer methods could reliably predict the tertiary structures of plant Hbs. We next predicted the tertiary structure of Hbm. Hbm appears to have a long pre-helix A and a large CD-loop. The positions of the distal and proximal His are identical in Hbm and rice Hb1, which suggests that heme-Fe is hexacoordinate in Hbm and that the kinetic properties of Hbm and rice Hb1 are expected to be very similar, i.e. that Hbm has a high O-2-affinity. Thermostability analysis showed that Hbm CD-loop is unstable and may provide mobility to amino acids located at the heme pocket for both ligand binding and stabilization and heme-Fe coordination. Analysis of the C-terminal half of Hbm showed the existence of a pocket-like region (the N/C cavity) where interactions with organic molecules or proteins could be possible. Lys K94 protrudes into the N/C cavity, suggesting that K94 may sense the binding of molecules to the N/C cavity. Thus, it is likely that the instability of the CID-loop and the possibility of binding molecules to the N/C cavity are essential for positioning amino acids in the heme pocket and in regulating Hbm activity and function. (C) 2004 Elsevier SAS. All rights reserved MH - Mexico|Morelos MH - USA PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0981-9428 UR - ISI:000227153500007 L2 - hemoglobin;non-symbiotic;Zea;maize;structure;function;HORSERADISH-PEROXIDASE; SOYBEAN LEGHEMOGLOBIN; ESCHERICHIA-COLI; LIGAND-BINDING; EXPRESSION; CLONING; PLANTS; KINETICS; STRESS; GENES SO - Plant Physiology and Biochemistry 2004 ;42(11):891-897 12338 UI - 3231 AU - Safar J AU - Noa-Carrazana JC AU - Vrana J AU - Bartos J AU - Alkhimova O AU - Sabau X AU - Simkova H AU - Lheureux F AU - Caruana ML AU - Dolezel J AU - Piffanelli P AD - CIRAD, UMR 1096, UMR385, F-34398 Montpellier 5, FranceInst Expt Bot, Lab Mol Cytogenet & Cytometry, CZ-77200 Olomouc, Czech RepublicIPN, CINVESTAV, Genet Engn Dept, Irapuato, MexicoPalacky Univ, Dept Biol Celular & Genet, CR-77147 Olomouc, Czech RepublicDolezel, J, CIRAD, UMR 1096, UMR385, Ave Agropolis,TA40-03, F-34398 Montpellier 5, France TI - Creation of a BAC resource to study the structure and evolution of the banana (Musa balbisiana) genome AB - The first bacterial artificial chromosome (BAC) library of the banana species Musa balbisiana 'Pisang Klutuk Wulung' (PKW BAC library) was constructed and characterized. One improved and one novel protocol for nuclei isolation were employed to overcome problems caused by high levels of polyphenols and polysaccharides present in leaf tissues. The use of flow cytometry to purify cell nuclei eliminated contamination with secondary metabolites and plastid DNA. Furthermore, the usefulness of the inducible pCCIBAC vector to obtain a higher amount of BAC DNA was demonstrated. The PKW BAC library represents nine haploid genome equivalents of M. balbisiana and its mean insert size is 135 kb. It consists of two sublibraries, of which the first one (SN sublibrary with 24 960 clones) was prepared according to an improved standard nuclei isolation protocol, whereas the second (FN sublibrary with 11904 clones) was obtained from flow-sorted nuclei. Screening with 12 RFLP probes, which were genetically anchored to 8 genetic linkage groups of the banana species Musa acuminata, revealed an average of 11 BAC clones per probe, thus confirming the genome coverage estimated based on the insert size, as well as a high level of conservation between the two species of Musa. Localization of selected BAC clones to mitotic chromosomes using FISH indicated that the BAC library represented a useful resource for cytogenetic mapping. As the first step in map-based cloning of a genetic factor that is involved in the activation of integrated pararetroviral sequences of Banana streak virus (BSV), the BSV expressed locus (BEL) was physically delimited. The PKW BAC library represents a publicly available tool, and is currently used to reveal the integration and activation mechanisms of BSV sequences and to study banana genome structure and evolution MH - Czech Republic MH - France MH - Mexico|Guanajuato PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 7 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000226927300021 L2 - bacterial artificial chromosome library;banana;BAC-FISH;flow cytometry;Musa balbisiana;Banana streak virus;BSV;ARTIFICIAL CHROMOSOME LIBRARY; IN-SITU HYBRIDIZATION; MOLECULAR CYTOGENETICS; DIPLOID BANANAS; STREAK DISEASE; PLANT NUCLEI; DNA; CLONING; CONSTRUCTION; IDENTIFICATION SO - Genome 2004 ;47(6):1182-1191 12339 UI - 6001 AU - Sala E AU - burto-Oropeza O AU - Reza M AU - Paredes G AU - Lopez-Lemus LG AD - Ctr Marine Biodivers & Conservat, La Jolla, CA, USAUniv Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093, USAUniv Autonoma Baja California, La Paz, Baja California, MexicoWorld Wildlife Fund, Gulf Calif Program, Hermosillo, Sonora, MexicoSala, E, Ctr Marine Biodivers & Conservat, La Jolla, CA, USA TI - Fishing down coastal food webs in the Gulf of California AB - We used information from interviews with fishers, fisheries statistics, and field surveys to document changes in fisheries and fish assemblages in shallow coastal habitats in the Gulf of California, Mexico. Coastal food webs in the Gulf of California have been "fished down" during the last 30 years-fisheries shifted from large, long-lived species belonging to high trophic levels to small short-lived species from lower trophic levels. In addition, the maximum individual length of the landings has decreased about 45 cm in only 20 years. Although some catches are stagnant or still increasing for some species groups, catch-per-unit-effort declined for most species groups after 1980. These declines were associated to a dramatic increase in fishing effort in the region in the late 1970s-early 1980s, mostly in the number of gillnets. Fishing not only impacted target species, but also caused community-wide changes. These results suggest that coastal fisheries in the Gulf of California are unsustainable and their management needs to be reevaluated with sound regulatory measures to prevent further degradation of coastal food webs, and the concurrent inefficiency of artisanal fishing MH - Mexico|Baja California MH - Mexico|Sonora MH - USA PB - BETHESDA: AMER FISHERIES SOC RP - NOT IN FILE U3 - TC 11 U4 - Fisheries U5 - J;Article AV - English IS - 0363-2415 UR - ISI:000220166100008 L2 - MARINE; CONSERVATION; ECOSYSTEMS; COLLAPSE; HOTSPOTS SO - Fisheries 2004 ;29(3):19-25 12340 UI - 6463 AU - Salaices M AU - Serrano B AU - de Lasa HI AD - Univ Western Ontario, Chem Reactor Engn Ctr, Fac Engn Sci, London, ON N6A B9, CanadaInst Invest Elect, Cuernavaca, Morelos, MexicoUniv Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas, Mexicode Lasa, HI, Univ Western Ontario, Chem Reactor Engn Ctr, Fac Engn Sci, London, ON N6A B9, Canada TI - Photocatalytic conversion of phenolic compounds in slurry reactors AB - The present study reports a series-parallel kinetic model, based on the experimentally observed evolution of liquid-phase species. The model is adequate to describe the conversion of phenolic compounds in slurry units. The reported model can be applied under a wide range of operating conditions and this includes different pHs, two catalysts (Degussa P25 and Hombikat UV100) and several initial phenol concentrations. Furthermore, it is proven that the parameters resulting from this model, can be estimated with reduced spans and adequate reliability. Finally, PTEF and quantum efficiencies based on the initial phenol photodegradation remain, for the various operating conditions of this study, at 0.43-0.77% and 0.94-1.67% levels, respectively. (C) 2003 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|Morelos MH - Mexico|Zacatecas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0009-2509 UR - ISI:000188119100001 L2 - photocatalysis;kinetics;phenol photodegradation;quantum efficiencies;HETEROGENEOUS PHOTOCATALYSIS; ORGANIC POLLUTANTS; PHOTON-ABSORPTION; TIO2 POWDER; WATER; DEGRADATION; OXIDATION; KINETICS; DECOMPOSITION SO - Chemical Engineering Science 2004 ;59(1):3-15 12341 UI - 4563 AU - Salas-Rojas M AU - Sanchez-Hernandez C AU - Romero-Almaraz MDL AU - Schnell GD AU - Schmid RK AU - guilar-Setien A AD - Hosp Pediat Mexico City, Ctr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Coordinac Invest Med,Unidad Invest Med Inmunol, Mexico City 06500, DF, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoUniv Oklahoma, Dept Zool, Norman, OK 73072, USASam Noble Oklahoma Museum Nat Hist, Norman, OK 73072, USAAguilar-Setien, A, Hosp Pediat Mexico City, Ctr Med Nacl Siglo XXI, Inst Mexicano Seguro Social, Coordinac Invest Med,Unidad Invest Med Inmunol, Rio Tigris 22-301,Col Cuauhtemoc, Mexico City 06500, DF, Mexico TI - Prevalence of rabies and LPM paramyxovirus antibody in non-hematophagous bats captured in the Central Pacific coast of Mexico AB - To investigate if non-hematophagous bats play a role in outbreaks of rabies and blue eye disease (LPMV), we studied the seroprevalence against both agents in several species of non-hematophagous bats on the sub-tropical Pacific coast of the state of Colima, Mexico. The survey covered a predominantly agricultural area (disturbed), and an area dominated by semideciduous dry forest (undisturbed). A total of 151 non-hematophagous bats of 16 species were captured from the two areas. Fifty-six (37%) had antirabic antibodies (Ab) while 87 (58%) did not and 8 samples (5%) had to be discarded because of hemolysis. A much lower (P < 0.05) prevalence of antirabic Ab was found in bats caught in disturbed areas (22.7%) compared with those from undisturbed areas (51.9%). The presence of antirabic Ab was not related to sex, genera or feeding habits. The higher prevalence found in bats in the undisturbed area may be the result of more frequent interspecies encounters. Of the 108 sera analyzed for antibodies against LPMV, only one was positive (a male Rhogeessa parvula major, captured in the undisturbed area). This suggests that bats in the surveyed localities do not play a role in the epidemiology of LPMV. (C) 2004 Royal Society of Tropical Medicine and Hygiene. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC TROPICAL MEDICINE RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health;Tropical Medicine U5 - J;Article AV - English IS - 0035-9203 UR - ISI:000223462100002 L2 - rabies;LPM paramyxovirus;antibodies;non-hematophagous bats;Mexico;HENDRA VIRUS; FRUIT BATS; LYSSAVIRUS INFECTION; PTEROPID BATS; HORSES; HUMANS; MORBILLIVIRUS; POPULATIONS; DISEASE; FAMILY SO - Transactions of the Royal Society of Tropical Medicine and Hygiene 2004 ;98(10):577-584 12342 UI - 4509 AU - Salas-Solis MC AU - guilera-Granja F AU - Cartes J AU - Contreras S AU - Vogel EE AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoUniv La Frontera, Dept Fis, Temuco, ChileSalas-Solis, MC, Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, Mexico TI - Axial anisotropic effects in hysteresis of +/- J Ising lattices AB - Anisotropy is added to the Edwards-Anderson model in such a way that interactions along the x axis are stronger by a factor f with respect to other interactions. Hysteresis cycles for square and cubic +/-J Ising spin glasses are obtained by Monte Carlo simulations. Concentration x of ferromagnetic interactions (-J), temperature T, and f are varied to study their effects on the characteristics of the hysteresis loops. Several behaviors are simulated and compared to experimental curves, finding similarities. Important aspects such as virgin curve, remnant magnetization, and coercive field are discussed in detail. It is found that anisotropy tends to stabilize spin-glass phases, leading to a larger remnant magnetization and larger coercive field MH - Chile MH - Mexico|San Luis Potosi PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000223716300041 L2 - SPIN-GLASSES; SQUARE LATTICES; AVALANCHES; ORDER SO - Physical Review B 2004 ;70(6): 12343 UI - 5677 AU - Salas-Solis MC AU - guilera-Granja F AU - Vogel EE AU - Cartes J AD - Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78290, MexicoUnvi La Frontera, Dept Fis, Temuco, ChileSalas-Solis, MC, Univ Autonoma San Luis Potosi, Inst Fis, Dr manuel Nava 6,Apartado Postal 629,Av Alvaro Ob, San Luis Potosi 78290, Mexico TI - Hysteresis for anisotropic +/- J Ising square lattices AB - it is known that +/-J square Ising lattices exhibit hysteresis in the isotropic case emulating some general behavior of spin glasses. On the other hand, some experimental curves of hysteresis in real spin glasses show additional features not explained by simulation on isotropic systems. In the present work, we explore the possibility of explaining some of these features by introducing anisotropic +/-J exchange interactions so they are stronger along one direction by an anisotropy factor f (square symmetry is broken), which is varied in the interval 1-8. For each sample, hysteresis cycles are found varying temperature by means of Monte Carlo method. The analysis is extended over many samples for each size searching for average magnetization values under different realizations. Two interesting properties are established in this paper: (a) Loops break into sub loops: (b) Energy loss per cycle (area within the hysteresis loop) tends to increase with,f which is an indication for a more stable spin-glass phase in the presence of anisotropy. Comments comparing these results with experiment are also included. (C) 2003 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|San Luis Potosi PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500013 L2 - Ising square lattices;anisotropy;hysteresis;spin glasses;SPIN-GLASSES SO - Journal of Alloys and Compounds 2004 ;369(1-2):55-57 12344 UI - 5280 AU - Salas S AU - Gaertner D AD - IPN, CINVESTAV, Unidad Merida, Merida 97310, Yucatan, MexicoCtr Halieut Mediterraneen & Trop, F-34203 Sete, FranceSalas, S, IPN, CINVESTAV, Unidad Merida, Antigua Carretera Progreso Km 6, Merida 97310, Yucatan, Mexico TI - The behavioural dynamics of fishers: management implications AB - In pursuing their livelihood, fishers develop strategies when faced with changes in regulations and other fishery conditions. Changes involve each individual in a decision-making process governed by his/her own goals or constraints. Despite this reality. the complex dynamics of fishing has usually been ignored in designing management initiatives. which has contributed to management failures in many parts of the world. Fishers have generally been treated as fixed elements, with no consideration of individual attitudes based on their operating scales (geographical, ecological. social and economic) and personal goals. We review existing research on the social. economic and behavioural dynamics of fishing to provide insight into fisher behaviour and its implications for fisheries management. Emphasis is placed on fisher perception. and how fishers develop dynamic fishing tactics and strategies as an adaptive response to changes in resource abundance, environmental conditions and market or regulatory constraints. We conclude that knowledge of these dynamics is essential for effective management, and we discuss how such information can be collected. analysed and integrated into fisheries assessment and management. Particular emphasis is placed on small-scale fisheries. but some examples from industrial fleets are provided to highlight similar issues in different types of fisheries MH - France MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Fisheries U5 - J;Review AV - English IS - 1467-2960 UR - ISI:000221948700005 L2 - fisheries management;fishing dynamics;fishing strategies;fishing tactics;opportunity cost;SMALL-SCALE FISHERIES; FISHING STRATEGIES; FLEET DYNAMICS; CATCH RATES; COMANAGEMENT; COOPERATION; MODELS; CONSERVATION; EFFICIENT; PROGRAMS SO - Fish and Fisheries 2004 ;5(2):153-167 12345 UI - 5643 AU - Salas S AU - Sumaila UR AU - Pitcher T AD - Cinvestav Merida, Merida, Yucatan, MexicoUniv British Columbia, Fisheries Ctr, Vancouver, BC V6T 1Z4, CanadaSalas, S, Cinvestav Merida, Km 6 Antigua Carretera Progreso, Merida, Yucatan, Mexico TI - Short-term decisions of small-scale fishers selecting alternative target species: a choice model AB - The complexity of small-scale fisheries makes it difficult to predict the allocation of fishing effort among alternative target species in mixed fisheries, resulting in limitation for fisheries management. One reason for the difficulty is that fishing effort has been assumed as an aggregate of different components, without consideration of fishers' decisions. In this paper, we use discrete choice models to identify factors involved in fishers' decisions about selecting target species on a daily basis. We analyze catch data, by species and fisher, from three fishing communities of Yucatan, Mexico, to contrast the following models: (i) random selection, (ii) economic motivation, and (iii) changes in resource availability. Our results show that fishers do not operate at random but consider information on resource availability and revenues generated from previous trips before selecting or shifting a target. We compare the results among communities and also use the proposed models to predict changes in fishing effort levels given changes in species price and catch per unit effort. We stress the importance of understanding fishers' behavior when it comes to developing appropriate management policies MH - Canada MH - Mexico|Yucatan PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 8 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0706-652X UR - ISI:000220993400006 L2 - BEHAVIOR; DYNAMICS; FLEET; CATCH SO - Canadian Journal of Fisheries and Aquatic Sciences 2004 ;61(3):374-383 12346 UI - 5739 AU - Salazar-Garcia F AU - Gallardo-Diaz E AU - Ceron-Mireles P AU - Loomis D AU - Borja-Aburto VH AD - Univ Autonoma Estado Mexico, Mexico City, DF, MexicoInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoUniv N Carolina, Sch Publ Hlth, Chapel Hill, NC, USAInst Mexicano Seguro Social, Mexico City, DF, MexicoBorja-Aburto, VH, Ctr Med Nacl Siglo 21, Ave Cuauhtemoc 330,5 Piso,Colonia Doctores, Mexico City 06725, DF, Mexico TI - Reproductive effects of occupational DDT exposure among male malaria control workers AB - To assess potential effects of human DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane] exposure, we evaluated the reproductive history of 2,033 workers in the antimalaria campaign of Mexico. Data on occupational exposure to DDT and reproductive outcomes were gathered through a questionnaire, and workers provided information about 9,187 pregnancies. We estimated paternal exposure to DDT before each pregnancy using three approaches: a) a dichotomous indicator for pregnancies before and after exposure began, b) a qualitative index of four exposure categories, and c) an estimation of the DDT metabolite DDE [1,1-trichloro-2,2-bis(p-chlorophenyl) ethylene] accumulated in fat. To assess associations, we used logistic regression models that accounted for correlated observations and adjusted for parents' age at each child's birth, exposure to other pesticides, exposure to chemical substances in other employment, smoking, and alcohol consumption. The odds ratio for birth defects comparing pregnancies after and before the first exposure was 3.77 [95% confidence interval (95% CI), 1.19-9.52]. Compared with the lowest quartile of estimated DDE in fat, the ORs were 2.48 (95% CI, 0.75-8.11), 4.15 (95% CI, 1.38-12.46), and 3.76 (95% CI, 1.23-11.44) for quartiles 2, 3, and 4, equivalent to p,p'-DDE in fat of 50, 82, and 298 mug/g fat, respectively. No significant association was found for spontaneous abortion or sex ratio. We found an increased risk of birth defects associated with high occupational exposure to DDT in this group of workers. The significance of this association at lower exposure levels found in the general population remains uncertain MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000220770400039 L2 - birth defects;DDT;occupational exposure;sex ratio;spontaneous abortion;SPONTANEOUS-ABORTION; PESTICIDES; METABOLITE; ASSOCIATION; P,P'-DDE; BIRTHS; RATIO; RISK SO - Environmental Health Perspectives 2004 ;112(5):542-547 12347 UI - 6529 AU - Salazar-Martinez E AU - Willett WC AU - Ascherio A AU - Manson JE AU - Leitzmann MF AU - Stampfer MJ AU - Hu FB AD - Harvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115, USAHarvard Univ, Sch Med, Channing Lab, Boston, MA 02115, USABrigham & Womens Hosp, Boston, MA 02115, USAMexican Inst Social Secur, Cuernavaca, Morelos, MexicoHu, FB, Harvard Univ, Sch Publ Hlth, Dept Nutr, 665 Huntington Ave, Boston, MA 02115 USA TI - Coffee consumption and risk for type 2 diabetes mellitus AB - Background: in small, short-term studies, acute administration of caffeine decreases insulin sensitivity and impairs glucose tolerance. Objective: To examine the long-term relationship between consumption of coffee and other caffeinated beverages and incidence of type 2 diabetes mellitus. Design: Prospective cohort study. Setting: The Nurses' Health Study and Health Professionals' Follow-up Study. Participants: The authors followed 41934 men from 1986 to 1998 and 84 276 women from 1980 to 1998. These participants did not have diabetes, cancer, or cardiovascular disease at baseline. Measurements: Coffee consumption was assessed every 2 to 4 years through validated questionnaires. Results: The authors documented 1333 new cases of type 2 diabetes in men and 4085 new cases in women. The authors found an inverse association between coffee intake and type 2 diabetes after adjustment for age, body mass index, and other risk factors. The multivariate relative risks for diabetes according to regular coffee consumption categories (0, <1, I to 3, 4 to 5, or greater than or equal to6 cups per day) in men were 1.00, 0.98, 0.93, 0.71, and 0.46 (95% Cl, 0.26 to 0.82; P = 0.007 for trend), respectively. The corresponding multivariate relative risks in women were 1.00, 1.16, 0.99, 0.70, and 0.71 (Cl, 0.56 to 0.89; P < 0.001 for trend), respectively. For decaffeinated coffee, the multivariate relative risks comparing persons who drank 4 cups or more per day with nondrinkers were 0.74 (Cl, 0.48 to 1.12) for men and 0.85 (Cl, 0.61 to 1.17) for women. Total caffeine intake from coffee and other sources was associated with a statistically significantly lower risk for diabetes in both men and women. Conclusions: These data suggest that long-term coffee consumption is associated with a statistically significantly lower risk for type 2 diabetes MH - USA MH - Mexico|Morelos PB - PHILADELPHIA: AMER COLL PHYSICIANS RP - NOT IN FILE U3 - TC 88 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0003-4819 UR - ISI:000187855600001 L2 - CORONARY-HEART-DISEASE; GLUCOSE-TOLERANCE; CAFFEINE INGESTION; ENERGY-EXPENDITURE; DIETARY FIBER; DOUBLE-BLIND; WOMEN; HUMANS; METABOLISM; VOLUNTEERS SO - Annals of Internal Medicine 2004 ;140(1):1-8 12348 UI - 4042 AU - Salazar R AU - Escamilla MA AU - Mendoza R AU - Esparza E AU - Montero P AU - Ontiveros A AU - Nicolini H AU - Medina R AU - Saucedo E AU - Herrera C AU - Lizano A AU - Contreras S AU - Dassori A AD - Univ Costa Rica, San Jose, Costa RicaUniv Texas, Hlth Sci Ctr, San Antonio, TX, USAHarbor Univ Calif Los Angeles Res & Educ Inst, Los Angeles, CA, USALogan Hts Family Clin, San Diego, CA, USAInst Informac & Invest Saludad Mental, Monterrey, MexicoGrp Estudios Med & Familiares Carracci, Mexico City, DF, MexicoCtr Salud Mental Estado Baja California, Mexicali, Baja California, Mexico TI - Use of the diagnostic interview for genetic studies (DIGS) in an international genetics study of Latino subjects from the US, Mexico and Costa Rica: Training and reliability issues MH - Costa Rica MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000223742600501 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2004 ;130B(1):131-131 12349 UI - 5255 AU - Salcedo R AU - Sansores LE AU - Picazo A AU - Sanson L AD - Univ Nacl Autonoma Mexico, Dept Polymers, Inst Invest Mat, Mexico City 04510, DF, MexicoSVM Formulat Conditionnement Faconnage, F-67138 Muhlbach Sur Bruche, FranceSalcedo, R, Univ Nacl Autonoma Mexico, Dept Polymers, Inst Invest Mat, Circuito Exterior,Ciudad Univ,Apartado Postal 70-, Mexico City 04510, DF, Mexico TI - [8]circulene. Theoretical approach AB - The electronic characteristics of [8]circulene (C32H16) were studied by DFT methods. The neutral form of this molecule has a ruffled structure that shows aromatic behaviour in spite of its non-planar nature. The correspondent dianion has a planar shape but is very unstable. This peculiar behaviour with respect to the expected characteristics due to its structure was analysed on the base of the corresponding MO. The aromaticity of both isomers was estimated by an HOMA study. The results indicate that the planar ionic species is not possible due to the large energy difference relative to the neutral molecule. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000221921400029 L2 - circulenes;[S]circulene;electronic structured;aromaticity;PI-ELECTRON SYSTEMS; 3,5-DEHYDROPHENYL CATION; DOUBLE AROMATICITY; CORRELATION-ENERGY; CORANNULENE; DENSITY; EXCHANGE; MODEL SO - Journal of Molecular Structure-Theochem 2004 ;678(1-3):211-215 12350 UI - 4756 AU - Saldivar-Garcia AJ AU - Lopez HF AD - Inst Tecnol Saltillo, Dept Met Mecan, Saltillo 25000, Coahuila, MexicoUniv Wisconsin, Dept Mat Engn, Milwaukee, WI 53201, USASaldivar-Garcia, AJ, Inst Tecnol Saltillo, Dept Met Mecan, Saltillo 25000, Coahuila, Mexico TI - Temperature effects on the lattice constants and crystal structure of a Co-27Cr-5Mo low-carbon alloy AB - Cobalt base (Co-Cr-Mo-C) alloys are known to exhibit two crystal structures, namely, face-centered-cubic (fcc) and hexagonal-close-packed (hcp). Accordingly, in this work, fcc and hcp lattice constants were measured at room and elevated temperatures in a Co-27Cr-5Mo-0.05C alloy using "in-situ" X-ray diffraction techniques. It was found that the lattice parameters corresponding to both the fcc and hcp phases increase linearly with temperature as a result of thermal expansion. Linear (alpha(1)) and volumetric (alpha(v)) coefficients of thermal expansion were computed for the main crystal structures found in this alloy. In particular, it was found that the fcc phase deviates from ideal isotropy as a, was approximated by alpha(v) = 2.7 alpha(1). Also, the equilibrium fcc-hcp temperature was established to be approximately 970 degreesC. In particular, the thermodynamic stability of the fcc phase and its effect on the exhibited lattice parameters were disclosed. Moreover, measurements of alloy density with temperature indicated a linear decrease as a result of thermal expansion. Finally, the (cla) ratio found for the hcp phase exhibited a nonlinear trend with temperature. This, in turn, was accompanied by a contraction along the hcp c-axis MH - Mexico|Coahuila MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000223069100035 L2 - TRANSFORMATION SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2004 ;35A(8):2517-2523 12351 UI - 5411 AU - Salgado-Garza LR AU - Stern RM AU - Nolazco JA AD - ITESM, Dept Comp Sci, Nuevo Leon 64849, Mexico. Carnegie Mellon Univ, Dept Elect & Comp Engn, Pittsburgh, PA 15213, USA TI - N-best list rescoring using syntactic trigrams AB - This paper demonstrates the usefulness of syntactic trigrams in improving the performance of a speech recognizer for the Spanish language. This technique is applied as a post-processing stage that uses syntactic information to rescore the N-best hypothesis list in order to increase the score of the most syntactically correct hypothesis. The basic idea is to build a syntactic model from training data, capturing syntactic dependencies between adjoint words in a probabilistic way, rather than resorting to the use of a rule-based system. Syntactic trigrams are used because of their power to express relevant statistics about the short-distance syntactic relationships between the words of a whole sentence. For this work we used a standarized tagging scheme known as the EAGLES tag definition, due of its ease of use and its broad coverage of all grammatical classes for Spanish. Relative improvement for the speech recognizer is 5.16%, which is statistically significant at the level of 10%, for a task of 22,398 words (HUB-4 Spanish Broadcast News) MH - Mexico|Nuevo Leon MH - USA T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlesalgado@itesm.mx rms@cs.cmu.edu jnolazco@itesm.mx1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600009 SO - 2004 ;():79-88 12352 UI - 4839 AU - Salgado-Maldonado G AU - Cabanas-Carranza G AU - Soto-Galera E AU - Pineda-Lopez RF AU - Caspeta-Mandujano JM AU - guilar-Castellanos E AU - Mercado-Silva N AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoInst Politecn Nacl, Escuela Nacl Ciencias Biol, Lab Ictiol & Limnol, Mexico City 11340, DF, MexicoUniv Autonoma Estado Queretaro, Fac Biol, Queretaro, MexicoUniv Autonoma Estado Morelos, Ctr Invest Biol, Cuernavaca 62210, Morelos, MexicoUniv Wisconsin, Ctr Limnol, Madison, WI 53706, USASalgado-Maldonado, G, Univ Nacl Autonoma Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Helminth parasites of freshwater fishes of the Panuco River Basin, east Central Mexico AB - This study presents results from a survey of helminth parasites of fishes in the Panuco River basin, in the states of San Luis Potosi. Hidalgo, Queretaro and Guamkjuato, all in east central Mexico. Seventeen freshwater fish species (n 1,019) were examined for helminths between May 1997 and September 1998. Thirty-one helminth species were collected: 11 allogenic species, mostly Nearctic in origin, and 20 autogenic species. Two anthropogenically introduced species were recorded. The most prevalent and widespread helminth taxon was Posthodiplosloinuin minimum (metacercariae). The helminth fauna of fishes of the Panuco River is dominated by trematodes (12 species) and nematodes (11 species) accompanied by a few monogenean (4 species), cestode (3 species), and acanthocephalan (1 species) taxa. Most of the helminth taxa reported have been reported from other regions of Mexico. Thus, the helminth parasite fauna of fishes of the Panuco River basin are not exclusive, including a primordially autogenic Neotropical species component mixed with a mainly allogenic, globally distributed Nearctic species component. The regional freshwater fish helminth fauna is associated with the ichthyofaunanal composition of the basin. The nematode family Rhabdochonidae displays high species richness in this hydrological basin of Mexico MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Queretaro MH - USA PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 12 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000223036100013 L2 - Digenea;Monogenea;Cestoda;Nematoda;Acanthocephala;helminth parasites of freshwater fishes;Panuco River Basin;Mexico;survey;CENOTES EQUALS SINKHOLES; YUCATAN PENINSULA; RHABDOCHONIDAE; TREMATODES; NEMATODA SO - Comparative Parasitology 2004 ;71(2):190-202 12353 UI - 6414 AU - Salgado-Maldonado G AU - Mercado-Silva N AU - Cabanas-Carranza G AU - Caspeta-Mandujano JM AU - guilar-Aguilar R AU - Iniguez-Davalos LI AD - Natl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Wisconsin, Ctr Limnol, Madison, WI 53706, USAUniv Autonoma Estado Morelos, Ctr Invest Biol, Cuernavaca, Morelos, MexicoUniv Guadalajara, Ctr Univ Costa Sur, Zool Lab, Autlan de Navarro 49800, Jalisco, MexicoSalgado-Maldonado, G, Natl Autonomous Univ Mexico, Inst Biol, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - Helminth parasites of freshwater fishes of the Ayuquila River, Sierra de Manantlan Biosphere Reserve, west central Mexico AB - This study presents results from the first survey of the helminth parasites of fishes in the Ayuquila River, Sierra de Manantlan Biosphere Reserve, in the states of Jalisco and Colima, west central Mexico. Twenty-eight helminth species were collected from 14 freshwater fish species in July 2000 and February 2001. No helminth species collected is exclusive to the Ayuquila River: 11 are allogenic species, mostly Nearctic in origin, and 17 are autogenics. Three introduced species were recovered. Saccocoelioides sogandaresi (Trematoda) was the most prevalent and widespread helminth recovered. The fish helminth fauna of the Ayuquila River is dominated by trematode and nematode species with only a few monogenean and acanthocephalan species. The fauna exhibits considerable overlap with that reported for other freshwater basins in Mexico, and all helminths recovered have been reported previously from Mexico MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Morelos MH - USA PB - LAWRENCE: HELMINTHOLOGICAL SOC WASHINGTON RP - NOT IN FILE U3 - TC 17 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 1525-2647 UR - ISI:000188293400011 L2 - Sierra de Manantlan Biosphere Reserve;Mexico;Characidae;Astyanax aeneus;Goodeidae;Allodontichthys zonistius;Goodea atripinnis;Ilyodon furcidens;Xenotoca melanosoma;Poeciliidae;Poecilia butleri;Poeciliopsis baenschi;Xiphophorus helleri;Centrachidae;Micropterus salmoides;Cichlidae;Nandopsis (Cichlasoma) istlanum;Oreochromis aureus;Mugilidae;Agonostomus monticola;Gobiidae;Sycidium multipunctatum;Scartomyzon austrinus;Monogenea;Ancyrocephalidae;Ancyrocephalus;Cichlydogyridae;Cichlidogyrus sclerosus;Microcotylidae;Trematoda;Allocreadiidae;Creptotrema agonostomi;Gorgoderidae;Dendrorchis;Haploporidae;Saccocoelioides sogandaresi;Macroderidae;Margotrema bravoae;Magnivitellinum simplex;Heterophydae;Centrocestus formosanus;Ascocotyle (Ascocotyle) tenuicollis;Ascocotyle (Phagicola) nana;Diplostomidae;Diplostomum;Posthodiplostomum minimum;Uvulifer;Clinostomidae;Clinostomum complanatum;Cestoda;Bothriocephalidae;Bothriocephalus acheilognathi;Dilepididae;metacestode;Nematoda;Capillaridae;Capillaria cyprinodonticola;Rhabdochonidae;Rhabdochona kidderi;Rhabdochona mexicana;Rhabdochona lichtenfelsi;Rhabdochona guerreroensis;Cystidicolidae;Spinitectus agonostomi;Camallanidae;Procamallanus (Spirocamallanus) jalisciencis;Anisakidae;Contracaecum;Dioctophymatidae;Eustrongylides;Gnathostomidae;Spiroxys;Acanthocephala;Polymorphidae;Polymorphus;CENOTES EQUALS SINKHOLES; YUCATAN PENINSULA; TREMATODES; DRAINAGES; BASIN SO - Comparative Parasitology 2004 ;71(1):67-72 12354 UI - 4653 AU - Salgado-Rodriguez R AU - Licea-Claverie A AU - Arndt KF AD - Inst Tecnol Tijuana, Ctr Graduados & Invest, Tijuana 22000, BC, MexicoTech Univ Dresden, Inst Phys Chem & Elektrochem, D-01062 Dresden, GermanyLicea-Claverie, A, Inst Tecnol Tijuana, Ctr Graduados & Invest, A-P 1166, Tijuana 22000, BC, Mexico TI - Random copolymers of N-isopropylacrylamide and methacrylic acid monomers with hydrophobic spacers: pH-tunable temperature sensitive materials AB - Two series of random copolymers of N-isopropylacrylamide (NIPAAm) and comonomers derived from methacrylic acid with a different number of methylene units as hydrophobic spacers (n = 4, 7 and 10) were synthesized via free radicals. The first series was prepared having the acid groups methoxy-protected while the second series have the acid groups free. The NIPAAm-copolymers of both series were prepared varying the comonomer content from 5 to 20 mol%. All the copolymers were characterized by FTIR, DSC, (1) H NMR and SLS. The aqueous solution behaviour of the copolymers having methoxy-protected acid groups shows that the comonomer increases the hydrophobicity of the copolymer chain and decreases its lower critical solution temperature (LCST). For the copolymers having free acid groups, hydrogen-bonding is responsible for a further decrease in the LCST of these copolymers in pure water. In buffer solutions, every acid comonomer have a critical ionization degree (alpha(crit)) above which the LCST increases with increasing comonomer content while at an ionization degree lower than alpha(crit) the LCST decreases with increasing comonomer content. In dependence of comonomer content, number of methylene units in the spacer and the pH of the buffer solution, the LOST of the copolymers can be varied widely, showing that these random copolymers have pH-tunable temperature sensitivity. (C) 2004 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0014-3057 UR - ISI:000223383400042 L2 - poly(N-isopropylacrylamide);lower critical solution temperature;thermosensitive;hydrophobic;pH;random copolymers;L-LEUCINE RESIDUES; ACRYLIC-ACID; FLUORESCENCE SPECTROSCOPY; AQUEOUS-SOLUTION; L-VALINE; POLY(N-ISOPROPYLACRYLAMIDE); POLYMERS; BEHAVIOR; WATER; MICROCALORIMETRY SO - European Polymer Journal 2004 ;40(8):1931-1946 12355 UI - 5425 AU - Salgado GR AU - Amy B AD - CENIDET, Mexico City, DF, Mexico. Lab LEIBNIZ IMAG, Grenoble, France TI - Treatment of gradual knowledge using Sigma-Pi neural networks AB - This work belongs to the field of hybrid systems for Artificial Intelligence (AI). It concerns the study of "gradual" rules, which makes it possible to represent correlations and modulation relations between variables. We propose a set of characteristics to identify these gradual rules, and a classification of these rules into "direct" rules and "modulation" rules. In neurobiology, pre-synaptic neuronal connections lead to gradual processing and modulation of cognitive information. While taking as a starting point such neurobiological data, we propose in the field of connectionism the use of "Sigma-Pi" connections to allow gradual processing in AI systems. In order to represent as well as possible the modulation processes between the inputs of a network, we have created a new type of connection, "Asymmetric Sigma-Pi" (ASP) units. These models have been implemented within a pre-existing hybrid neuro-symbolic system, the INSS system, based on connectionist nets of the "Cascade Correlation" type. The new hybrid system thus obtained, INSSGradual, allows the learning of bases of examples containing gradual modulation relations. ASP units facilitate the extraction of gradual rules from a neural network MH - France MH - Mexico|Distrito Federal T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlegreyes@cenidet.edu.mx amy@imag.fr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600088 SO - 2004 ;():854-861 12356 UI - 4167 AU - Salin-Pascual RJ AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, MexicoSalin-Pascual, RJ, CSIC, Inst Invest Biomed Barcelona, Rossello 162,6, E-08036 Barcelona, Spain TI - Hypocretins and adenosine in the regulation of sleep AB - Aims. To review the recent discovery of hypocretins (orexins) and their link to the pathophysiology of narcolepsy and the role of adenosine in the integration of brain metabolism and sleep. Development. The importance of the functions carried out by the hypothalamus in the regulation of sleep and the waking state has been consolidated by the discovery of hypocretins and the role played by cerebral adenosine. Hypocretins are two peptides made up of 33 and 28 amino acids whose neurons are located predominantly in the lateral hypothalamus and surrounding regions. In the Doberman canine narcolepsy model, in which this disease is presented with an autosomal recessive pattern, a mutation was detected in one of the receptors involved in the hypocretin system, namely the hypocretin-2 receptor. Failures in the hypocretin system have been confirmed as a key factor in narcolepsy by other findings in laboratory animals and humans. Adenosine, on the other hand, is accumulated during the waking state as a result of neuronal metabolism and this in turn is related to drowsiness. Sleep episodes lower the levels of this substance in the brain. Adenosine receptor antagonists increase wakefulness (e.g. caffeine), while the agonists promote slow-wave sleep. Conclusions. Hypocretins and adenosine from the hypothalamus perform functions involving the regulation of sleep and wakefulness. Understanding these two systems can have repercussions on clinical problems such as insomnia, hypersomnia and other neuropsychiatric disorders MH - Mexico|Distrito Federal MH - Spain PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 2 U4 - Clinical Neurology U5 - J;Review AV - English IS - 0210-0010 UR - ISI:000224378400012 L2 - adenosine;aging;caffeine;hypocretin;narcolepsy;sleep;VENTROLATERAL PREOPTIC NUCLEUS; OREXIN DEFICIENCY; NEURONS; NARCOLEPSY; RAT; WAKEFULNESS; MODULATION; PEPTIDES; CAT; IDENTIFICATION SO - Revista de Neurologia 2004 ;39(4):354-358 12357 UI - 4587 AU - Salvador M AU - Perlado JM AU - Mattoni A AU - Bernardini F AU - Colombo L AD - Univ Politecn Madrid, Inst Fus Nucl, DENIM, ETSII, E-28006 Madrid, SpainUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas de los Garza 66450, NL, MexicoUniv Cagliari, INFM, SLACS, I-09042 Monserrato, CA, ItalyUniv Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, ItalyPerlado, JM, Univ Politecn Madrid, Inst Fus Nucl, DENIM, ETSII, Jose Gutierrez Abascal 2, E-28006 Madrid, Spain TI - Defect energetics of beta-SIC using a new tight-binding molecular dynamics model AB - We present the calibration of a semi-empirical and orthogonal tight-binding total energy model for defect energetics in beta-SiC, as based on a state-of-the-art ab initio data base for the formation energies of carbon and silicon vacancies, antisites, and self-interstitials. The present total energy model is further applied within a molecular dynamics framework to investigate the silicon and carbon interstitial defect contribution to the self-diffusion in beta-SiC. We provide a fully atomistic model for both migration path and diffusivity, giving also a quantitative estimation of energy migration barriers. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Nuevo Leon MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Nuclear Science & Technology;Mining & Mineral Processing U5 - J;Article AV - English IS - 0022-3115 UR - ISI:000223505200062 L2 - TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; SYSTEMS SO - Journal of Nuclear Materials 2004 ;329-33():1219-1222 12358 UI - 3872 AU - Sanchez-Burgos G AU - Hernandez-Pando R AU - Campbell IL AU - Ramos-Castaneda J AU - Ramos C AD - Inst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Dept Arbovirus, Cuernavaca 62508, Morelos, MexicoInst Nacl Nutr Salvador Zubiran, Dept Patol Expt, Mexico City 14000, DF, MexicoScripps Res Inst, Dept Neuropharmacol, La Jolla, CA 92037, USARamos, C, Inst Nacl Salud Publ, Ctr Invest Enfermedades Infecciosas, Dept Arbovirus, Av Univ 655,Colonia Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Cytokine production in brain of mice experimentally infected with dengue virus AB - Dengue virus encephalopathy was experimentally induced in newborn mice by i.p. inoculation of dengue 2 virus. At 6 and 9 days post-infection, motor incoordination and posterior limb paralysis were observed with focal necrosis, apoptotic cells, perivascular inflammatory cuffing and astrocytosis, mainly in the cortex and hippocampus. Expression of dengue virus genome and mRNA encoding for TNF-alpha, IL-1alpha IL-2, IL-6, IL-1beta, IL-12p40, IFNalpha, and IFNbeta; in addition host survival and inflammatory response genes MAC-1, EB22, GFAP, ICAM-1 and A20, were increased, suggesting that experimental dengue encephalitis could be associated with virus replication, inflammatory cytokine production or both. Similar findings have been observed in human dengue virus infection. Therefore, our results can be useful to elucidate and support the physiopathology of the disease MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Neurosciences U5 - J;Article AV - English IS - 0959-4965 UR - ISI:000225139800009 L2 - cytokine brain expression;dengue virus infection;histopathology;mouse;CENTRAL-NERVOUS-SYSTEM; NITRIC-OXIDE SYNTHASE; LYMPHOCYTIC CHORIOMENINGITIS; INTERFERON-GAMMA; GENE-EXPRESSION; MOUSE MODEL; SCID MICE; CELLS; INTERLEUKIN-6; MONOCYTES SO - Neuroreport 2004 ;15(1):37-42 12359 UI - 5357 AU - Sanchez-Carrillo S AU - Angeler DG AU - Sanchez-Andres R AU - varez-Cobelas M AU - Garatuza-Payan J AD - Inst Tecnol Sonora, Dept Ciencias Agua & Medioambiente, Sonora 85000, MexicoUniv Castilla La Mancha, Dept Ciencias Medioambiente, E-45071 Toledo, SpainCSIC, Ctr Ciencias Medioambientales, E-28006 Madrid, SpainSanchez-Carrillo, S, Inst Tecnol Sonora, Dept Ciencias Agua & Medioambiente, 5 Febrero 818 Sur,Ciudad Obregon, Sonora 85000, Mexico TI - Evapotranspiration in semi-arid wetlands: relationships between inundation and the macrophyte-cover: open-water ratio AB - Open water evaporation and macrophyte transpiration rates were analyzed in a semi-arid, freshwater wetland in Central Spain over two meteorological periods between 1993 and 1998. The aim was identifying the importance of these variables in the dynamics of evapotranspiration in different water level scenarios. Throughout the vegetation growth period, transpiration versus evaporation ratios were about 2 for cut-sedge, 1 for reed and 0.5 for cattail, but these values declined significantly when calculated on a yearly basis. Open water area to macrophyte cover ratios showed significant dependence on inundation. Increased vegetation cover did not result in a statistically significant reduction of evapotranspiration, but it did increase the transpiration to evaporation ratio. Increased open water area resulted in increased wetland evapotranspiration. The results indicate that Linacre's theory needs to be modified to take into account emergent macrophyte strategies to flood tolerance and plant physiological traits. The authors provide a conceptual model to explain wetland evapotranspiration dynamics in relation to vegetation cover, physiological strategies and inundation. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Sonora MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Water Resources U5 - J;Article AV - English IS - 0309-1708 UR - ISI:000221814200006 L2 - evaporation;transpiration;evapotranspiration;hydrology;semi-arid wetland;PRAIRIE WETLAND; TRANSPIRATION; EVAPORATION; VEGETATION; LAKESHORE; DYNAMICS; PATTERNS; SURFACE; BUDGET; MARSH SO - Advances in Water Resources 2004 ;27(6):643-655 12360 UI - 4213 AU - Sanchez-Castillo A AU - Pou J AU - Lusquinos F AU - Quintero F AU - Soto R AU - Boutinguiza M AU - Saavedra M AU - Perez-Amor M AD - Univ Michoacana, Inst Invest Met, Morelia, Michoacan, MexicoUniv Vigo, Dept Fis Aplicada, E-36200 Vigo, SpainSanchez-Castillo, A, Univ Michoacana, Inst Invest Met, San Nicolas Hidalgo Edif U,Ciudad Univ, Morelia, Michoacan, Mexico TI - Dimensional characteristics of welds performed on AISI 1045 steel by means of the application of high power diode laser AB - The named High Power Diode Laser (HPDL), emits a beam of optical energy generated by diode stimulation and offers the capability of supplying levels of power up to 6 kW The objetive of this research work was to study the main welding variables and their effects on dimensional characteristics of the beads performed by means of application of this novel laser. The results obtained, show that HPDL, is an energy source able to perform welds on AISI 1045 steel plates under conduction model without any kind of mechanized preparation, preheating or post-weld treatment and, without filler metal application MH - Mexico|Michoacan MH - Spain PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - Spanish IS - 0034-8570 UR - ISI:000224266100007 L2 - laser welding;high power diode laser;shielding gas;carbon steel;depth of penetration;HEAT-TREATMENT SO - Revista de Metalurgia 2004 ;40(3):204-208 12361 UI - 3284 AU - Sanchez-Chapula JA AU - Ricardo RNP AD - Univ Invest Biomed Univ Colima, Unidad Invest Carlos Mendez Ctr, Colima 28045, MexicoUniv Utah, Dept Physiol, Eccles Program Human Mol Biol & Genet, Salt Lake City, UT 84112, USASanchez-Chapula, JA, Univ Invest Biomed Univ Colima, Unidad Invest Carlos Mendez Ctr, Av 25 Julio 965,Col Villa San Sebastian, Colima 28045, Mexico TI - Block of wild-type and inactivation-deficient human ether-a-go-go-related gene K+ channels by halofantrine AB - Halofantrine is an antimalarial drug developed as a treatment of P. falciparum resistant to chloroquine. However, halofantrine can also induce long QT syndrome (LQTS) and torsades de pointes, a potentially life-threatening ventricular arrhythmia. Drug-induced LQTS is usually caused by block of the human ether-a-go-go-related gene (HERG) channels that conduct the rapid delayed rectifier K+ current, I-Kr, in the heart. Here we show that halofantrine preferentially blocks open and inactivated HERG channels heterologously expressed in Xenopus laevis oocytes. The half-maximal inhibitory concentration (IC50) for block of wild-type (WT) HERG was 1.0 muM. As we reported previously for other HERG channel blockers, the potency of halofantrine was reduced by mutation to Ala of aromatic residues (Y652, F656) located in the S6 domain, or a Val (V625) located in the pore helix. Halofantrine at a concentration 10 muM did not affect the transient outward potassium channel, Kv4.3, the slow delayed rectifier potassium channel, KvLQT1+minK and inward rectifier potassium channel, Kir2.1. An inactivation deficient mutant (G628C/S631C HERG) was only slightly less sensitive (IC50=2.0 muM). The rate of block onset by halofantrine at 0 mV was used to estimate the apparent association (k(on)) and dissociation (k(off)) rate constants for drug binding. For WT and G628C/S631C HERG, k(on) was similar (0.0114 and 0.0163 M-1/s(-1) respectively). In contrast, koff was significantly faster for G628C/S631C (0.357 s(-1)) than WT (0.155 s(-1)), and explains the observed decrease in drug potency for the inactivation-deficient mutant channel. We conclude that halofantrine requires channels to open before it can gain access to its binding site located in the central cavity of the HERG channel MH - Mexico|Colima MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000226516500007 L2 - HERG POTASSIUM CHANNELS; LONG-QT SYNDROME; MOLECULAR DETERMINANTS; XENOPUS OOCYTES; INHIBITION; MUTATIONS; MECHANISM; CURRENTS; DOMAIN SO - Naunyn-Schmiedebergs Archives of Pharmacology 2004 ;370(6):484-491 12362 UI - 6458 AU - Sanchez-Corona J AU - Flores-Martinez SE AU - horro-Lazo MV AU - Galaviz-Hernandez C AU - Moran-Moguel MC AU - Perea FJ AU - Mujica-Lopez KI AU - Vargas-Ancona L AU - Laviada-Molina HA AU - Fernandez V AU - Pardio J AU - Arroyo P AU - Barrera H AU - Hanson RL AD - IMSS, Ctr Invest Biomed Occidente, Div Mol Med, Guadalajara 44340, Jalisco, MexicoFdn Mexicana Salud, Mexico City, DF, MexicoUniv Autonoma Nuevo Leon, Fac Med, Monterrey, Nuevo Leon, MexicoNIDDKD, Diabet & Arthrit Epidemiol Sect, Phoenix, AZ 85016, USASanchez-Corona, J, IMSS, Ctr Invest Biomed Occidente, Div Mol Med, Sierra Mojada 800,Col Independencia, Guadalajara 44340, Jalisco, Mexico TI - Polymorphisms in candidate genes for type 2 diabetes mellitus in a Mexican population with metabolic syndrome findings AB - The metabolic or insulin resistance syndrome, characterized by hypertension, dyslipidemia, glucose intolerance and hyperinsulinemia, may have genetic determinants. The insulin gene (INS), insulin receptor gene (INSR) and insulin receptor substrate 1 gene (IRS1) have been proposed as candidate genes. We examined eight polymorphisms in these genes in 163 individuals from Yucatan, Mexico; this population has a high prevalence of obesity, type 2 diabetes mellitus and dyslipidemia. Subjects were evaluated for body mass index (BMI) and blood pressure. Blood samples were collected to determine glucose, insulin, triglycerides and cholesterol levels, as well as for DNA isolation. Restriction fragment length polymorphisms in INS, INSR and IRS1 were identified by polymerase chain reaction and digestion with selected restriction enzymes. Among the eight polymorphisms analyzed, the PstI polymorphism in INS was significantly associated with hypertriglyceridemia and with the presence of at least one abnormality related to the metabolic syndrome (P = 0.007 and 0.004, respectively). The MaeIII polymorphism in INS was associated with fasting hyperinsulinemia (P = 0.045). In multilocus analyses including both INS polymorphisms, significant associations were seen with hypertriglyceridemia (P = 0.006), hypercholesterolemia (P = 0.031) and with presence of at least one metabolic abnormality (P = 0.009). None of the polymorphisms in INSR or IRS1 was associated with any of these traits. These findings suggest that the insulin gene may be an important determinant of metabolic syndrome, and particularly of dyslipidemia, in this population. (C) 2003 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 10 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0168-8227 UR - ISI:000188218400006 L2 - metabolic syndrome;genetics;type 2 diabetes mellitus;candidate genes;insulin;INSULIN-RECEPTOR SUBSTRATE-1; 5' FLANKING REGION; RESISTANCE; OBESITY; NIDDM; VARIANTS; LOCUS; SUSCEPTIBILITY; HYPERTENSION; ASSOCIATION SO - Diabetes Research and Clinical Practice 2004 ;63(1):47-55 12363 UI - 2780 AU - Sanchez-Gil P AU - Yanez-Arancibia A AU - Ramirez-Gordillo J AU - Day JW AU - Templet PH AD - ECOPLADS SC, Ecosist & Planificac Ambiental Para Desarrollo Su, Xalapa 91001, Veracruz, MexicoCONACYT Mexico, Inst Ecol AC, Unidad Ecosist Costeros, Div Estudios Posgrado, Xalapa 91070, Veracruz, MexicoLouisiana State Univ, Sch Coast & Environm, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803, USALouisiana State Univ, Sch Coast & Environm, Coastal Ecol Inst, Baton Rouge, LA 70803, USALouisiana State Univ, Sch Coast & Environm, Dept Environm Studies, Baton Rouge, LA 70803, USASanchez-Gil, P, ECOPLADS SC, Ecosist & Planificac Ambiental Para Desarrollo Su, POB 206, Xalapa 91001, Veracruz, Mexico TI - Some socio-economic indicators in the Mexican states of the Gulf of Mexico AB - The Gulf of Mexico (Gulf) is an important economic asset for the six Mexican coastal states (Tamaulipas, Veracruz, Tabasco, Campeche, Yucatan, and Quintana Roo) that border the Gulf. Many economic and social issues are geographic in nature; that is, they are associated with the coastal zone-from the coastal plain to the inner shelf. Other issues are related both to geography and to the use of water resources from low river basins to the estuarine plume and are therefore water-dependent. The main economic activities of the region are oil and gas production and petrochemical industries, fisheries, marine transportation, agriculture, cattle ranching, and tourism. More than 80% of economic activities for each of the six Mexican states are located in or associated with the coastal zone. Of the total national gross internal product (GIP, or PIB-the Spanish acronym), the states of the Gulf of Mexico contribute 12.9% of the national total (i.e., Tamaulipas 3.2%, Veracruz 4.5%, Tabasco 1.4%, Campeche 1.2%, Yucatan 1.3%, and Quintana Roo 1.3%). Several socio-economic indicators were selected for specific analysis in order to describe the main economic activities associated with each of the six states (population, income, GIP, fisheries, cattle ranching, port activities, and tourism). The results show the most important economic activities for each of the states are as follows: Tamaulipas (port activities and fisheries), Veracruz (petrochemical industries, port activities, and fisheries), Tabasco (oil and gas production), Campeche (fisheries and oil production), Yucatan (fisheries and tourism), and Quintana Roo (tourism). Some economic activities such as fisheries, agriculture, and cattle ranching, evidenced a decreasing trend during the last decade. This could be related to a decrease of habitat area and water quality in the coastal zone. (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Veracruz MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000227621600003 L2 - MANAGEMENT; BASIN SO - Ocean & Coastal Management 2004 ;47(11-12):581-596 12364 UI - 5391 AU - Sanchez-Gonzalez DJ AU - Moro MA AU - Castillo-Henkel C AU - Herrera-Gonzalez N AU - Hernandez-Pando R AU - Larios-Medina FJ AU - Cobilt R AU - Blanco JA AU - Pedraza-Chaverri J AU - Villanueva C AD - Inst Politecn Nacl, Escuela Super Med, Mexico City, DF, MexicoEscuela Med Mil, Mexico City, DF, MexicoUniv Complutense, Fac Med, Dept Farmacol, E-28040 Madrid, SpainInst Nacl Nutr Salvador Zubiran, Dept Patol, Mexico City, DF, MexicoUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoVillanueva, C, Inst Politecn Nacl, Escuela Super Med, Mexico City, DF, Mexico TI - Ozone exposure induces iNOS expression and tyrosine nitration in rat aorta AB - The aim was to study whether ozone affects vascular endothelium by causing inducible nitric oxide synthase (iNOS) expression and tyrosine nitration. We also studied biomarkers of endothelial function. Male Wistar rats were exposed to ozone (0.25 ppm, 4 h/day) or filtered air (control, ozone <0.05 ppm). After ozone exposure, blood samples were taken to measure 6-keto prostaglandin F1alpha (6-keto PGF1alpha), dehydro-thromboxane B-2 (DH-TxB(2)), endothelin-1 and NO2-/NO3- (NOx-). iNOS and nitrotyrosine were detected in aorta by immunohistochemistry. Nitrotyrosine was also detected by immunoelectromicroscopy. Control aortae failed to show either iNOS or nitrotyrosine. Time-dependent positive iNOS and nitrotyrosine cells were observed in exposed animals. Except for NOx-, endothelial markers decreased after 14 days of ozone exposure (P < 0.05). After 28 days of ozone, 6-keto PGF1alpha remained low (P < 0.05) while DH-TxB(2) increased (P < 0.05). It is concluded that ozone causes endothelial dysfunction manifested early with peroxynitrite formation and lately with changes in endothelial markers. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 1382-6689 UR - ISI:000221733900001 L2 - ozone;peroxynitrite;oxidative stress;endothelial dysfunction;NITRIC-OXIDE SYNTHASE; KAPPA-B ACTIVITY; ENDOTHELIAL-CELLS; OXIDATIVE STRESS; NO SYNTHASE; PEROXYNITRITE; LUNG; PATHOPHYSIOLOGY; DYSFUNCTION; SUPEROXIDE SO - Environmental Toxicology and Pharmacology 2004 ;17(1):1-7 12365 UI - 5061 AU - Sanchez-Gonzalez J AU - Moro MA AU - Hernandez-Pando R AU - Castillo-Henkel C AU - Mendoza R AU - Herrera-Gonzalez N AU - Pedraza-Chaverri J AU - Villanueva C AD - IPN, Escuela Super Med, Mexico City, DF, MexicoUDEFA, Escuela Med Militar, Mexico City, DF, MexicoUniv Complutense Madrid, Fac Med, E-28040 Madrid, SpainInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico TI - Peroxynitrite formation in aorta isolated from rats exposed to ozone MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0891-5849 UR - ISI:000221320200266 SO - Free Radical Biology and Medicine 2004 ;36():S102-S102 12366 UI - 2980 AU - Sanchez-Guerrero J AU - Mestanza M AU - Jimenez ML AU - Lara-Reyes P AU - Uribe A AU - Seuc A AU - Cravioto MC AD - INCMNSZ, Mexico City, DF, MexicoWHO, Dept Reprod Hlth & Res, CH-1211 Geneva, Switzerland TI - Safety of use and effect on disease activity of three contraceptive methods in women with systemic lupus erythematosus. A one year follow-up clinical trial MH - Mexico|Distrito Federal MH - Switzerland PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000223799001912 SO - Arthritis and Rheumatism 2004 ;50(9):S689-S689 12367 UI - 6258 AU - Sanchez-Lopez A AU - Centurion D AU - Vazquez E AU - Arulmani U AU - Saxena PR AU - Villalon CM AD - CINVESTAV IPN, Dept Farmacobiol, Mexico City 14330, DF, MexicoUniv Med Ctr Rotterdam, Erasmus MC, Cardiovascular Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, CINVESTAV IPN, Dept Farmacobiol, Czda Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Further characterization of the 5-HT1 receptors mediating cardiac sympatho-inhibition in pithed rats: pharmacological correlation with the 5-HT1B and 5-HT1D subtypes AB - Serotonin (5-hydroxytryptamine; 5-HT) is capable of inhibiting the tachycardic responses elicited by sympathetic stimulation, but not by exogenous noradrenaline, in pithed rats pre-treated with desipramine. More recently, it has been shown that this cardiac sympatho-inhibitory response to 5-HT, mediated by prejunctional 5-HT1 receptors as well as putative 5-ht(5A/5B) receptors, is mimicked dose-dependently by the agonists CP 93,129 (r5-HT1B), sumatriptan (5-HT1B/1D) and PNU-142633 (5-HT1D). This study analysed further the pharmacological profile of the above 5-HT1 receptors. Continuous i.v. infusions of CP 93,129, sumatriptan or PNU-142633 (30 mug kg(-1)min(-1) each) failed to modify the tachycardic responses to exogenous noradrenaline but inhibited those elicited by preganglionic (C7-T1) stimulation of the cardiac sympathetic outflow. These sympatho-inhibitory responses were unaltered after i.v. administration of physiological saline (1 ml kg(-1)) or the 5-HT1A receptor antagonist WAY 100635 (10 mug kg(-1)). In contrast, the antagonist GR 127935 (5-HT1B/1D; 100 mug kg(-1), i.v.) abolished the responses to CP 93,129, sumatriptan and PNU-142633, whilst SB224289 (5-HT1B; 300 mug kg(-1), i.v.) abolished the responses to CP 93,129 without affecting those to sumatriptan and PNU-142633. Interestingly, BRL15572 (5-HT1D; 300 mug kg(-1), i.v.) abolished the responses to PNU-142633 and attenuated those to sumatriptan, but not those to CP 93,129. WAY 100635, GR 127935, SB224289 and BRL15572, given alone at the above doses, failed to modify the sympathetically induced tachycardic responses. The 5-HT1 receptors producing cardiac sympatho-inhibition in pithed rats thus display the pharmacological profile of the 5-HT1B and 5-HT1D receptor subtypes MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 2 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000188836400011 L2 - 5-HT;prejunctional inhibition;tachycardia;sympathetic outflow;SB224289;BRL15572;PNU-142633;5-HT1B/1D receptors;NORADRENALINE RELEASE; GUINEA-PIG; SEROTONIN; 5-HYDROXYTRYPTAMINE; OUTFLOW; POTENT; STIMULATION; ANTAGONIST; AGONISTS; PROFILE SO - Naunyn-Schmiedebergs Archives of Pharmacology 2004 ;369(2):220-227 12368 UI - 5243 AU - Sanchez-Portal M AU - Diaz AI AU - Terlevich E AU - Terlevich R AD - Univ Pontificia Salamanca Madrid, Madrid 28040, SpainUniv Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, SpainInst Nacl Astrofis Opt & Elect, Puebla, MexicoUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandSanchez-Portal, M, Univ Pontificia Salamanca Madrid, Paseo Juan XXIII 3, Madrid 28040, Spain TI - Structural parameters of nearby emission-line galaxies AB - We present the results of an investigation on the main structural properties derived from VRI and Halpha surface photometry of galaxies hosting nuclear emission-line regions [including Seyfert 1, Seyfert 2, low-ionization nuclear emission region (LINER) and starburst galaxies] as compared with normal galaxies. Our original sample comprises 22 active galaxies, four starbursts and one normal galaxy and has been extended with several samples obtained from the literature. Bulge and disc parameters, along with the bulge-to-disc luminosity ratio, have been derived applying an iterative procedure. The resulting parameters have been combined with additional data in order to reach a statistically significant sample. We find some differences in the bulge distribution across the different nuclear types that could imply families of bulges with different physical properties. Bulge and disc characteristic colours have been defined and derived for our sample and compared with a control sample of early-type objects. The results suggest that bulge and disc stellar populations are comparable in normal and active galaxies MH - United Kingdom MH - Mexico|Puebla MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000221913200031 L2 - galaxies : active;galaxies : photometry;galaxies : structure;CCD SURFACE PHOTOMETRY; ACTIVE GALACTIC NUCLEI; TO-DISK RATIOS; SEYFERT-GALAXIES; SPIRAL GALAXIES; HOST GALAXIES; INFRARED PHOTOMETRY; ELLIPTIC GALAXIES; STARBURST NUCLEI; COLOR GRADIENTS SO - Monthly Notices of the Royal Astronomical Society 2004 ;350(3):1087-1106 12369 UI - 3658 AU - Sanchez-Salas N AU - Hernandez AC AD - Univ Salamanca, Fac Ciencias, Dept Fis, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoSanchez-Salas, N, Univ Salamanca, Fac Ciencias, Dept Fis, E-37008 Salamanca, Spain TI - Harmonic quantum heat devices: Optimum-performance regimes AB - The finite-time performance of a quantum-mechanical heat engine (or refrigerator) with a working fluid consisting of many noninteracting harmonic oscillators is considered in order to analyze three optimum operating regimes: maximum efficiency (maximum coefficient of performance), maximum work output (maximum cooling load) and a third one, Omega criterion, which represents a compromise between them. The reported results extend previous findings for macroscopic and mesoscopic energy converters to quantum heat devices and also endorse the Omega criterion as a unified, optimum working regime for energy converters, independent of their size and nature MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000225689600042 L2 - RECTIFYING THERMAL FLUCTUATIONS; UNIFIED WORKING REGIME; FINITE-TIME; ENGINES; THERMODYNAMICS; CYCLE SO - Physical Review e 2004 ;70(4): 12370 UI - 4538 AU - Sanchez-Valdez I AU - costa-Gallegos JA AU - Ibarra-Perez FJ AU - Rosales-Serna R AU - Singh SP AD - INIFAP, Bean Program, Saltillo 25100, Coahuila, MexicoUniv Idaho, Dept Plant Soil & Entomol Sci, E Kimberly, ID 83341, USAAcosta-Gallegos, JA, Apartado Postal 112, Celaya 38000, Gto, Mexico TI - Registration of 'Pinto saltillo' common bean MH - Mexico|Coahuila MH - Mexico|Guanajuato MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000223586200052 L2 - COLLETOTRICHUM-LINDEMUTHIANUM SO - Crop Science 2004 ;44(5):1865-1866 12371 UI - 4012 AU - Sanchez-Zavala JL AU - Ortega-Gutierrez F AU - Keppie JD AU - Jenner GA AU - Belousova E AU - ias-Romo C AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoMem Univ Newfoundland, Dept Earth Sci, St Johns, NF A1B 3X5, CanadaMacquarie Univ, Dept Earth & Planetary Sci, GEMOC Natl Key Ctr, N Ryde, NSW 2109, AustraliaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoKeppie, JD, Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico TI - Ordovician and mesoproterozoic zircons from the Tecomate Formation and Esperanza granitoids, Acatlan Complex, southern Mexico: Local provenance in the Acatlan and Oaxacan complexes AB - Detrital zircons from the Middle Permian and older Tecomate Formation, formerly the Uppermost Unit of the Acatlan Complex ill southern Mexico, yielded the following U-Pb, LA-ICP-MS ages: (1) a major Cambro-Ordovician population with peaks at 460 and 500 Ma; (2) a limited Neoproterozoic population (729 and 879 ilia); an(] (3) a major Mesoproterozoic population ranging from similar to940 to 1.6-50 Ma with peaks at similar to1025 Ma and 1100-1300 Ma. The type locality of [lie Esperanza blastomy-lonitic granite yielded concordant U-Pb ages of 471 6 Ma, which, along with similar granitoids in the Acatlan Complex, appears to be the source of the Cambro-Ordovician detrital zircons in the Tecomate Formation. The provenance of the Mesoproterozoic detrital zircons seems to be in the adjacent Oaxacan Complex, which has yielded ages ranging from similar to1450 to 917 Ma. The Neoproterozoic detrital zircons may - , have been recycled from other units in the Acatlan Complex. These data are consistent with Pangea reconstructions that place the Acatlan Complex in its present location relative to the rest of Mexico MH - Australia MH - Canada MH - Mexico|Distrito Federal PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 5 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000224779200003 L2 - GEOCHRONOLOGY; GEOCHEMISTRY; MA SO - International Geology Review 2004 ;46(11):1005-1021 12372 UI - 5428 AU - Sanchez A AU - Zapata R AD - BUAP, Fac Ciencias Computat, Puebla 72550, MexicoCNRS, UMR 5506, LIRMM, Montpellier 5, FranceSanchez, A, BUAP, Fac Ciencias Computat, 14 Sur esq, Puebla 72550, Mexico TI - Towards derandomizing PRM planners AB - Probabilistic roadmap methods (PRM) have been successfully applied in motion planning for robots with many degrees of freedom. Many recent PRM approaches have demonstrated improved performance by concentrating samples in a nonuniform way. This work replace the random sampling by the deterministic one. We present several implementations of PRM-based planners (multiple-query, single-query and Lazy PRM) and lattice-based roadmaps. Deterministic sampling can be used in the same way than random sampling. Our work can be seen as an important part of the research in the uniform sampling field. Experimental results show performance advantages of our approach MH - France MH - Mexico|Puebla PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000221506600094 L2 - CONFIGURATION-SPACES SO - Micai 2004: Advances in Artificial Intelligence 2004 ;2972():911-920 12373 UI - 5727 AU - Sanchez A AU - Macias A AU - Quevedo H AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Phys, Davis, CA 95616, USASanchez, A, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Generating Gowdy cosmological models AB - Using the analogy with stationary axisymmetric solutions, we present a method to generate new analytic cosmological solutions of Einstein's equation belonging to the class of T-3 Gowdy cosmological models. We show that the solutions can be generated from their data at the initial singularity and present the formal general solution for arbitrary initial data. We exemplify the method by constructing the Kantowski-Sachs cosmological model and a generalization of it that corresponds to an unpolarized T-3 Gowdy model. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000220875800011 L2 - SPACETIMES; SINGULARITIES; WAVES SO - Journal of Mathematical Physics 2004 ;45(5):1849-1858 12374 UI - 6107 AU - Sanchez A AU - Olmos J AD - Ctr Invest Cient & Educ Super Ensenada, Dept Biotecnol Marina, Ensenada, Baja California, MexicoOlmos, J, Biotecnol Marina, POB 434844, San Diego, CA 92143, USA TI - Bacillus subtilis transcriptional regulators interaction AB - Bacillus subtilis aprE gene codes for the extracellular protease subtilisin. Its expression is controlled by AbrB, DegU, Hpr, SinI, SinR and Spo0A transition state protein regulators. To determine in vivo the protein - protein interactions among these regulators, we used the LexA-based bacterial genetic two-hybrid system. Our results show homo-dimerization to all the analyzed proteins and hetero-dimerization between SinR-SinI and SinR-Hpr MH - Mexico|Baja California MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000189363300005 L2 - subtilisin gene;transition state regulators;two-hybrid system;DNA-BINDING PROTEIN; ESCHERICHIA-COLI; LEXA REPRESSOR; SPORULATION; SINR; GENE; EXPRESSION; MUTATIONS; ABRB; MUTANTS SO - Biotechnology Letters 2004 ;26(5):403-407 12375 UI - 5550 AU - Sanchez C AU - Tellez-Tellez M AU - az-Godinez G AU - Moore D AD - Univ Autonoma Tlaxcala, Res Ctr Biol Sci, Biotechnol Lab, Tlaxcala 90000, MexicoUniv Manchester, Sch Biol Sci, Manchester, Lancs, EnglandSanchez, C, Univ Autonoma Tlaxcala, Res Ctr Biol Sci, Biotechnol Lab, Apartado Postal 129, Tlaxcala 90000, Mexico TI - Simple staining detects ultrastructural and biochemical differentiation of vegetative hyphae and fruit body initials in colonies of Pleurotus pulmonarius AB - Aims: To know the ultrastructural and biochemical differences of vegetative hyphae and fruit body initials in colonies of Pleurotus pulmonarius. Methods and Results: Feulgen reagent was used to detects differentiation of hyphae. The intracellular laccases, proteases and beta-1,3-glucanases activity, content of cytoplasmic protein, glycogen and glucans in the cell wall were evaluated in hyphae of fruit body initials and in vegetative hyphae. The thickness of hyphal walls of the vegetative hyphae was also evaluated. Substantial biochemical changes were observed in hyphae of different zones of the fruiting colony. Hyphae at the periphery had thinner walls than in the centre of the colony. Conclusion, Significance and Impact of the Study: Staining correlated with the enzymatic activity, protein, glycogen and glucans, in mycelium and in fruit body initials. The implications are that hyphal maturity in P. pulmonarius involves storage of glucans, in part at least, in the form of a thickened hyphal wall MH - United Kingdom MH - Mexico|Tlaxcala PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0266-8254 UR - ISI:000221256600007 L2 - basidiomycetes;enzymatic activity;fruit body initials;hyphal differentiation;vegetative mycelium;AGARICUS-BISPORUS; MORPHOGENESIS; METABOLISM; GROWTH; FUNGI SO - Letters in Applied Microbiology 2004 ;38(6):483-487 12376 UI - 4005 AU - Sanchez EC AU - Torres E AU - Diaz C AU - Saito F AD - Ctr Invest Mat Avanzados, SC, Chihuahua 31109, MexicoUABC, Fac Ciencias Quim Ingn, San Ysidro, CA, USATohoku Univ, Inst Adv Mat Proc, Sendai, Miyagi 980, JapanSanchez, EC, Ctr Invest Mat Avanzados, SC, Miguel de Cervantes 120,Complejo Ind Chihuahua, Chihuahua 31109, Mexico TI - Effects of grinding of the feldspar in the sintering using a planetary ball mill AB - The feldspar mineral has been ground using a planetary ball mill with a stainless steel ball and bowl. During grinding, the ground sample gets contaminated with Fe from ball and bowl wall, the same as the amorphization and agglomeration of fine particles that increase as grinding time progresses. The effect of sintering is carried out in the recrystallization and consolidation of the mechanical activation of anorthoclase feldspar to transform albite and anorthite, and iron to hematite in the glazed matrix. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Chihuahua MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Industrial;Engineering, Manufacturing;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0924-0136 UR - ISI:000224742300005 L2 - grinding;raw material;non-metallic minerals;feldspar;anorthoclase;anorthite;albite;mechanical activation;trybology SO - Journal of Materials Processing Technology 2004 ;152(3):284-290 12377 UI - 4219 AU - Sanchez GT AU - Piekarewicz J AD - UNAM, Inst Fis, Mexico City 0100, DF, MexicoFlorida State Univ, Dept Phys, Tallahassee, FL 32306, USASanchez, GT, UNAM, Inst Fis, AP 20-364, Mexico City 0100, DF, Mexico TI - Color screening in a constituent quark model of hadronic matter AB - The effect of color screening on the formation of a heavy quark-antiquark (Q (Q) over bar) bound state-such as the J/psi meson-is studied using a constituent-quark model. The response of the nuclear medium to the addition of two color charges is simulated directly in terms of its quark constituents via a string-flip potential that allows for quark confinement within hadrons yet enables the hadrons to separate without generating unphysical long-range forces. Medium modifications to the properties of the heavy meson, such as its energy and its mean-square radius, are extracted by solving Schrodinger's equation for the Q (Q) over bar pair in the presence of a (screened) density-dependent potential. The density dependence of the heavy-quark potential is in qualitative agreement with earlier studies of its temperature dependence extracted from lattice calculations at finite temperature. In the present model it is confirmed that abrupt changes in the properties of the J/psi-meson in the hadronic medium (plasma), correlate strongly with the deconfining phase transition MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000224325900054 L2 - HEAVY-ION COLLISIONS; NUCLEAR-MATTER; GLUON PLASMA; TRANSITION; SUPPRESSION; STARS; CHARM; QCD SO - Physical Review C 2004 ;70(3): 12378 UI - 6149 AU - Sanchez J AU - Medina G AU - Buhse T AU - Holmgren J AU - Soberon-Chavez G AD - Univ Nacl Autonoma Mexico, Fac Med, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Ctr Invest Quim, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, UAEM, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoUNAM, Inst Invest Biomed, Mexico City, DF, MexicoUniv Gothenburg, Dept Med Microbiol & Immunol, Gothenburg, SwedenSanchez, J, Univ Nacl Autonoma Mexico, Fac Med, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Expression of cholera toxin under non-AKI conditions in Vibrio cholerae El Tor induced by increasing the exposed surface of cultures AB - The regulatory systems controlling expression of the ctx4B genes encoding cholera toxin (CT) in the classical and El Tor biotypes of pathogenic Vibrio cholerae have been characterized and found to be almost identical. Notwithstanding this, special in vitro conditions, called AKI conditions, are required for El Tor bacteria to produce CT. The AKI conditions involve biphasic cultures. In phase 1 the organism is grown in a still tube for 4 h. In phase 2 the medium is poured into a flask to continue growth with shaking. Virtually no expression of CT occurs if this protocol is not followed. Here we demonstrated that CT expression takes place in single-phase still cultures if the volume-to-surface-area ratio is decreased, both under air and under an inert atmosphere. The expression of key genes involved in the regulation of CT production was analyzed, and we found that the expression pattern closely resembles the in vivo expression pattern MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Sweden PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000189117900016 L2 - VIRULENCE GENE-EXPRESSION; BIOTYPE-SPECIFIC CONTROL; REGULATORY CASCADE; TRANSCRIPTIONAL ACTIVATION; DIFFERENTIAL EXPRESSION; ENVIRONMENTAL SIGNALS; TCPPH PROMOTER; STRAINS; BINDING; REGULON SO - Journal of Bacteriology 2004 ;186(5):1355-1361 12379 UI - 5809 AU - Sanchez M AU - Sanchez F AU - Perez-Rosales C AU - Medina A AU - Trevino C AD - Univ Politecn Madrid, ETSI Aeronaut, E-28040 Madrid, SpainInst Mexicano Petr, Programa YNF, Grp Medios Porosos & Granulados, Mexico City 07730, DF, MexicoUNAM, Fac Ciencias, Mexico City 04510, DF, MexicoMedina, A, Univ Politecn Madrid, ETSI Aeronaut, E-28040 Madrid, Spain TI - Imbibition in a Hele-Shaw cell under a temperature gradient AB - Imbibition in a Hele-Shaw cell under a constant, longitudinal temperature gradient G was analyzed both theoretically and experimentally. A theoretical approach based on a motion equation was developed in this case and a closed-form analytical solution has been obtained. Theory shows that the time evolution of the front is strongly dependent on the way in which the surface tension and the viscosity change as a function of the temperature. Experiments using parallel glass plates and glycerol were made under several gradients and they have fitted well to theoretical profiles. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000220548300003 L2 - FLOW; RECOVERY; OIL SO - Physics Letters A 2004 ;324(1):14-21 12380 UI - 3955 AU - Sanchez MA AU - Lemp GF AU - Magis-Rodriguez C AU - Bravo-Garcia E AU - Carter S AU - Ruiz JD AD - Univ Calif, Off President, Univ Wide AIDS Res Program, Oakland, CA 94612, USASIDA, VIH, Ctr Nacl Prevenc & Control, Secretaria Salud, Mexico City, DF, MexicoCalif Dept Hlth Serv, Off AIDS, Sacramento, CA, USASanchez, MA, Univ Calif, Off President, Univ Wide AIDS Res Program, 300 Lakeside Dr,6th Floor, Oakland, CA 94612 USA TI - The epidemiology of HIV among Mexican migrants and recent immigrants in California and Mexico AB - For Mexican migrants and recent immigrants, the impact of migration from Mexico to California has the potential to lead to an increased risk for HIV infection. Until recently, the prevalence of HIV in Mexico and among Mexican migrants in California appeared to be stable and relatively low. Recent studies have raised new concerns, however, that the HIV epidemic may expand more aggressively among this population in the coming years. Unfortunately, the insufficient amount of data available within recent years makes it difficult to fully assess the potential for rapid spread of the HIV epidemic among this population. Consequently, there is a critical need for an ongoing binational surveillance system to assess prevalence and trends in HIV/STD/TB disease and related risk behaviors among this population both in Calfornia and within this population's states of origin in Mexico. This enhanced epidemiologic surveillance system should provide improved data on the subpopulations at the highest risk for HIV/STD/TB, such as men who have sex with men, and should provide the opportunity to evaluate the impact of migration on the transmission dynamics, risk behaviors, and determinants of behavior on each side of the border. It is essential that this potential threat be assessed and that intervention programs are developed and implemented to combat this possible escalation in the HIV epidemic MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 9 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 1525-4135 UR - ISI:000224911600002 L2 - Mexican migrant;HIV;AIDS;STD;prevalence;California;Mexico;surveillance system;UNITED-STATES; AIDS; PREVALENCE; INFECTION; SYPHILIS SO - Jaids-Journal of Acquired Immune Deficiency Syndromes 2004 ;37():S204-S214 12381 UI - 5025 AU - Sancho JM AU - Lacasta AM AU - Lindenberg K AU - Sokolov IM AU - Romero AH AD - Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, SpainUniv Politecn Catalunya, Dept Fis Aplicada, E-08028 Barcelona, SpainUniv Calif San Diego, Dept Chem & Biochem 0340, La Jolla, CA 92093, USAUniv Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093, USAHumboldt Univ, Inst Phys, D-12489 Berlin, GermanyIPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoSancho, JM, Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, Diagonal 647, E-08028 Barcelona, Spain TI - Diffusion on a solid surface: Anomalous is normal AB - We present a numerical study of classical particles diffusing on a solid surface. The particles' motion is modeled by an underdamped Langevin equation with ordinary thermal noise. The particle-surface interaction is described by a periodic or a random two-dimensional potential. The model leads to a rich variety of different transport regimes, some of which correspond to anomalous diffusion such as has recently been observed in experiments and Monte Carlo simulations. We show that this anomalous behavior is controlled by the friction coefficient and stress that it emerges naturally in a system described by ordinary canonical Maxwell-Boltzmann statistics MH - Germany MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 28 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000222266100006 L2 - KRAMERS TURNOVER THEORY; LONG JUMPS; CU(001) SURFACE; POTENTIALS; DYNAMICS; ADATOMS; ATOMS SO - Physical Review Letters 2004 ;92(25): 12382 UI - 4128 AU - Sandoval-Castillo J AU - Rocha-Olivares A AU - Villavicencio-Garayzar C AU - Balart E AD - CICESE, Dept Oceanog Biol, Ensenada 22860, Baja California, MexicoUABCS, Dept Biol Marinas, La Paz 23080, BCS, MexicoCIBNOR, Dept Ciencias Marinas, La Paz 23090, BCS, MexicoRocha-Olivares, A, POB 434844, San Diego, CA 92143, USA TI - Cryptic isolation of Gulf of California shovelnose guitarfish evidenced by mitochondrial DNA AB - The shovelnose guitarfish Rhinobatos productus is an evolutionarily, ecologically, and economically important ray, with a continuous distribution from San Francisco, California (USA), to Mazatlan, Sinaloa, and in the Gulf of California (Mexico). Regional studies have revealed morphometric differences between shovelnose from the Gulf of California and the Pacific coast of Baja California, which may result from phenotypic plasticity in the presence of high levels of gene flow or from a degree of genetic differentiation in the presence of cryptic isolation within a continuous distribution. We used PCR-RFLP of the mitochondrial control region to assess the degree of genetic differentiation between Gulf of California and Pacific shovelnose guitarfish. We found very high levels of molecular diversity (averages: h=0.77, pi=1.19%), which may be associated with historically large and stable populations, as well as very significant levels of genetic differentiation between gulf and Pacific samples (chi(2)=64, P<0.0001; Phi(ST)=0.63, P<0.0001, mean nucleotide divergence d=2.47%). We found a deep phylogeographic break between haplotypes from the gulf and the Pacific, which may suggest the existence of cryptic species but clearly indicates more than one evolutionarily significant unit of R. productus. Our results show a pattern of genetic structure and levels of differentiation consistent with the geological history of the region. Furthermore, these findings have wide-ranging implications for the management and conservation of cartilaginous fish in Mexico, as they reveal the existence of biological diversity that will go unnoticed without the genetic scrutiny of intraspecific variation and that is highly relevant for much needed management and conservation efforts MH - Mexico|Baja California MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 9 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3162 UR - ISI:000224616200014 L2 - BAJA-CALIFORNIA; RESTRICTION ENDONUCLEASES; POPULATION HISTORIES; GENETIC-STRUCTURE; PACIFIC-OCEAN; SHARKS; FISH; PHYLOGEOGRAPHY; ATLANTIC; MEXICO SO - Marine Biology 2004 ;145(5):983-988 12383 UI - 4833 AU - Sandoval-Ramirez J AU - Meza-Reyes S AU - del Rio RE AU - Reyes-Vazques F AU - Santillan RL AU - Achab S AU - Bohe L AD - Benemerita Univ Autonoma Puebla, Fac Ciencias Quim, Puebla 7200, Pue, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoCNRS, ICSN, Inst Chim Subst Nat, F-91198 Gif Sur Yvette, FranceSandoval-Ramirez, J, Benemerita Univ Autonoma Puebla, Fac Ciencias Quim, Puebla 7200, Pue, Mexico TI - Short synthesis of new 23-vinyl steroid derivatives from sapogenins by the action of 9-BBN on vinylogous esters AB - Some new 16beta-acetoxy-22,26-epoxy-23-vinylcholest-22-ene steroid derivatives have been synthesized from sapogenins via a two-step sequence involving the reduction of a vinylogous ester moiety by 9-BBN, a reaction with few precedents and for which a coherent mechanistic interpretation has not been given before now. Some mechanistic insight into this reaction was gained from NMR spectroscopic evidence. A plausible general mechanistic interpretation of the action of 9-BBN on vinylogous esters is proposed. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004 MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000223037000011 L2 - sapogenins;spiroketal cleavage;vinylogous esters;9-BBN;23-Vinyl-22,26-epoxycholest-22-enes;ENANTIOSPECIFIC TOTAL-SYNTHESIS; CONVENIENT PROCEDURE; CONVERSION; HYDROBORATION; ROUTE; 9-BORABICYCLO<3.3.1>NONANE; DIENES; PSEUDOSARSASAPOGENIN; SARSASAPOGENIN; IMPROVEMENTS SO - European Journal of Organic Chemistry 2004 ;(15):3262-3268 12384 UI - 4073 AU - Saniga M AU - Planat M AU - Rosu H AD - Slovak Acad Sci, Inst Astron, Tatranska Lomnica 05960, SlovakiaCNRS, Dept LPMO, Inst FEMTO ST, F-25044 Besancon, FranceIPICyT, Dept Appl Math, San Luis Potosi, MexicoSaniga, M, Slovak Acad Sci, Inst Astron, Tatranska Lomnica 05960, Slovakia TI - Mutually unbiased bases and finite projective planes AB - It is conjectured that the question of the existence of a set of d + I mutually unbiased bases in a d-dimensional Hilbert space if d differs from a power of a prime number is intimately linked with the problem of whether there exist projective planes whose order d is not a power of a prime number MH - France MH - Mexico|San Luis Potosi MH - Slovakia PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 27 U4 - Optics;Physics, Applied U5 - J;Letter AV - English IS - 1464-4266 UR - ISI:000224632800001 L2 - mutually unbiased bases;MUBs;finite projective planes;Hopf fibrations;GEOMETRY; STATE SO - Journal of Optics B-Quantum and Semiclassical Optics 2004 ;6(9):L19-L20 12385 UI - 4947 AU - Santacruz-Varela A AU - Widrlechner MP AU - Ziegler KE AU - Salvador RJ AU - Millard MJ AU - Bretting PK AD - Iowa State Univ Sci & Technol, USDA ARS, Ames, IA 50011, USAIowa State Univ Sci & Technol, Dept Agron, Ames, IA 50011, USAColegio Postgrad, Montecillo 56230, Edo Mexico, MexicoUSDA ARS, Beltsville, MD 20715, USAWidrlechner, MP, Iowa State Univ Sci & Technol, USDA ARS, Ames, IA 50011 USA TI - Phylogenetic relationships among North American popcorns and their evolutionary links to Mexican and South American popcorns AB - To determine genetic relationships among representative popcorns (Zea mays L.) of the New World, 56 maize populations from the USA and nine Latin American countries were characterized for 29 morphological traits, 18 isozyme loci, and 31 SSR loci. Cluster and principal component analyses were performed upon standardized morphological data and allelic frequencies from isozyme and SSR loci to elucidate relationships among populations within a geographical and historical context. Three groups of popcorn, with distinctive morphological characteristics and genetic profiles, were identified in the North American populations. The first group includes the North American Yellow Pearl Popcorns, which are currently the most important for U.S. commercial production. This group could be derived from introductions of the race Curagua from Chile into New England in the 19th Century. The second group includes the North American Pointed Rice Popcorns, which probably originated from the complex of traditional races of pointed popcorns from Latin America, such as Palomero Toluqueno, Confite Puntiagudo, Canguil, and Pisankalla, which diffused from the highlands of central Mexico into northern Mexico and then into southwestern USA. The third group includes the North American Early Popcorns, which show a marked influence of Northern Flint maize, from which they probably acquired the trait of early maturity. This third group also shows genetic influences of maize from northwestern Mexico and even from early European varieties of popcorn introduced late in the 19th Century. We propose that the three groups of North American popcorn identified in this study be recognized taxonomically as distinct races, and we provide characteristic traits as well as isozyme and SSR alleles to define the new races MH - USA MH - Mexico|Estado De Mexico PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000222582400047 L2 - ISOZYME VARIATION; UNITED-STATES; MAIZE; CORN; CHARACTERS SO - Crop Science 2004 ;44(4):1456-1467 12386 UI - 2695 AU - Santana-Casteneda C AU - Izquierdo-Puente JC AU - Leon-Ochoa RA AU - Plasse T AU - Rayburn W AD - Clin Materno Infantil Alfredo Mazo ISSEMYM, Toluca, Edo Mexico, MexicoHosp Gineco Obstet Luis Castelazo Ayala, IMSS 4, Mexico City, DF, MexicoHosp Reg 1 Octubre, ISSSTE, Mexico City, DF, MexicoCytokine PharmaSci Inc, King Of Prussia, PA, USAUniv New Mexico, Albuquerque, NM 87131, USA TI - Misoprostol controlled-release vaginal insert for cervical ripening and induction of labor in nulliparous women MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 0002-9378 UR - ISI:000225925500664 SO - American Journal of Obstetrics and Gynecology 2004 ;191(6):S187-S187 12387 UI - 5884 AU - Santana N AU - Gonzalez ME AU - Valcarcel M AU - Canto-Flick A AU - Hernandez MM AU - Fuentes-Cerda CFJ AU - Barahona F AU - Mijangos-Cortes J AU - Loyola-Vargas VM AD - Inst Nacl Ciencias Agr, Havana 32700, CubaCtr Invest Cient Yucatan, Merida 97200, MexicoEstac Cent Invest Cafe & Cacao, Cruce De Los Banos 92700, Tercer Frente, CubaInst Tecnol Agropecuario, Conkal 97345, Yucatan, MexicoLoyola-Vargas, VM, Inst Nacl Ciencias Agr, Km 3-5, Havana 32700, Cuba TI - Somatic embryogenesis: A valuable alternative for propagating selected robusta coffee (Coffea canephora) clones AB - The behavior of four coffee (Coffea canephora cv. Robusta) clones was evaluated in this work to define the conditions that would allow somatic embryogenesis to be induced at different seasons of the year. The objective was to have an adaptive methodology for in vitro propagation of these four coffee clones that were selected for their agronomic characteristics. The use of 2,4-dichlorophenoxyacetic acid and Picloram in the culture medium at concentrations between 2.07 and 4.14 muM resulted in high-frequency somatic embryogenesis when leaves were collected between April and June for genotype C-R, and between April and July for M-229. Callus from 28 to 35d of induction showed better results throughout the whole regeneration process, particularly in liquid medium. There was a clear difference in the behavior of the clones evaluated MH - Cuba MH - Mexico|Yucatan PB - WALLINGFORD: C A B I PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Cell Biology;Developmental Biology U5 - J;Article AV - English IS - 1054-5476 UR - ISI:000220431300013 L2 - coffee;cell suspension;somatic embryogenesis;propagation;Picloram;PLANT-REGENERATION; LEAF EXPLANTS; LIQUID-MEDIUM; ARABICA; CULTURES; EMBRYOS; INDUCTION; GROWTH; GENOTYPE; DENSITY SO - In Vitro Cellular & Developmental Biology-Plant 2004 ;40(1):95-101 12388 UI - 3927 AU - Santiago-Lopez D AU - Vazquez-Roman B AU - Perez-De La Cruz V AU - Barrera D AU - Rembao D AU - Salinas-Lara C AU - Pedraza-Chaverri J AU - Galvan-Arzate S AU - Ali SF AU - Santamaria A AD - Inst Nacl Neurol & Neurociruga, Lab Aminoacidos Excitadores, Dept Neuroquim, Mexico City 14269, DF, MexicoUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Dept Neuropatol, Mexico City 14269, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Biol, Mexico City 04510, DF, MexicoInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Dept Neuroquim, Mexico City 14269, DF, MexicoUS FDA, Natl Ctr Toxicol Res, Div Neurotoxicol, Neurochem Lab, Jefferson, AR 72079, USASantamaria, A, Inst Nacl Neurol & Neurociruga, Lab Aminoacidos Excitadores, Dept Neuroquim, Insurgentes Sur 3877, Mexico City 14269, DF, Mexico TI - Peroxynitrite decomposition catalyst, iron metalloporphyrin, reduces quinolinate-induced neurotoxicity in rats MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences U5 - J;Article AV - English IS - 0887-4476 UR - ISI:000224902700006 L2 - iron porphyrinates;oxidative/nitrergic stress;excitotoxicity;antioxidant defense;neurotoxicity;ACID-INDUCED NEUROTOXICITY; NITRIC-OXIDE; DOPAMINERGIC NEUROTOXICITY; HUNTINGTONS-DISEASE; OXIDATIVE STRESS; CORPUS STRIATUM; IN-VIVO; DAMAGE; MODEL; ANTIOXIDANT SO - Synapse 2004 ;54(4):233-238 12389 UI - 5938 AU - Santiago P AU - Camacho-Bragado GA AU - Marin-Almazo M AU - Murgich J AU - Jose-Yacaman M AD - Univ Texas, Dept Chem Engn, Texas Mat Inst, Austin, TX 78712, USAUniv Texas, Ctr Nano & Mol Sci & Technol, Austin, TX 78712, USAUNAM, Inst Fis, Mexico City, DF, MexicoCtr Nucl Dr Nabor Carrillo Flores, ININ, Mexico Toluca 52045, MexicoIVIC, Ctr Quim, Caracas 1020A, VenezuelaJose-Yacaman, M, Univ Texas, Dept Chem Engn, Texas Mat Inst, Austin, TX 78712 USA TI - Diamond polytypes in Mexican crude oil AB - The presence of C nanoparticles in the asphaltenes precipitated from a crude oil from the sureste Basin in Mexico is reported. Most of the near spherical nanoparticles were identified as the 3C cubic polytype of carbon (n-diamond). A second type was found in much smaller quantities and identified as the 2H hexagonal polytype of diamond. The direct conversion of petroleum into nanodiamonds was ruled out on the basis of the high temperature (greater than or equal to 1400 degreesC) and pressures (greater than or equal to 5 GPa) required for the transformation. The nanodiamonds found may have had their origin in processes such as (a) the meteoritic impact shock waves acting on carbonaceous materials, (b) the deposition of a C plasma from a fireball produced by a meteoritic impact, or (c) the irradiation of the source material and/or the asphaltenes of the crude oil by highly energetic particles resulting from the nuclear fission of U and Th. It was also found that the available data did not allow an unambiguous identification of the process that generated the nanodiamonds MH - USA MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - Venezuela PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000220287400016 L2 - IMPACT CRATER; CARBON ONIONS; N-DIAMOND; ASPHALTENES; IRRADIATION SO - Energy & Fuels 2004 ;18(2):390-395 12390 UI - 6472 AU - Santiago P AU - Ascencio JA AU - Mendoza D AU - Perez-Alvarez M AU - Espinosa A AU - Reza-SanGermaan C AU - Schabes-Retchkiman P AU - Camacho-Bragado GA AU - Jose-Yacamaan M AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Autonoma Estado Mexico, Fac Quim, Toluca 50120, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoUniv Texas, Dept Chem Engn, CNM, Austin, TX 78712, USAUniv Texas, TMI, Austin, TX 78712, USAFac Ciencias VAEMEX, Toluca 50000, MexicoSantiago, P, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Synthesis and structural determination of twisted MoS2 nanotubes AB - In the present work we report the synthesis of MoS2 nanotubes with diameters greater than 10 nm using a template method. The length and properties of these nanotubes are a direct result of the preparation method. High-resolution transmission electron microscopy is used to study the structure of these highly curved entities. Molecular dynamics simulations of MoS2 nanotubes reveal that one of the stable forms of the nanotubes is a twisted one. The twisting of the nanotubes produces a characteristic contrast in the images, which is also studied using simulation methods. The analysis of the local contrast close to the perpendicular orientation shows geometrical arrays of dots in domain-like structures, which are demonstrated to be a product of the atomic overlapping of irregular curvatures in the nanotubes. The configuration of some of the experimentally obtained nanotubes is demonstrated to be twisted with a behavior suggesting partial plasticity MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000188347700015 L2 - FULLERENE-LIKE STRUCTURES; FIELD-EFFECT TRANSISTORS; MOLECULAR-MECHANICS; CARBON NANOTUBES; WS2 NANOTUBES; FABRICATION; DISULFIDE; DYNAMICS SO - Applied Physics A-Materials Science & Processing 2004 ;78(4):513-518 12391 UI - 4182 AU - Santillan M AU - Zeron ES AD - Inst Politecn Nacl, Dept Fis, Esc Sup Fis & Matemat, Mexico City 07738, DF, MexicoMcGill Univ, Ctr Nonlinear Dynam, Montreal, PQ H3G 1Y6, CanadaCINVESTAV, IPN, Dept Matemat, Mexico City 07000, DF, MexicoSantillan, M, Inst Politecn Nacl, Dept Fis, Esc Sup Fis & Matemat, Edif 9,UP Zacatenco, Mexico City 07738, DF, Mexico TI - Dynamic influence of feedback enzyme inhibition and transcription attenuation on the tryptophan operon response to nutritional shifts AB - A mathematical model of the tryptophan operon is developed. This model considers all of the system known regulatory mechanisms: repression, transcription attenuation, and feedback enzyme inhibition. Special attention is paid to the estimation of all the model parameters from reported experimental data. The model equations are numerically solved. An analysis of these solutions reveals that transcription attenuation helps to speed up the operon response to nutritional shifts, while enzyme inhibition increases the operon stability. (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000224438000014 L2 - tryptophan operon;mathematical model;multiplicity of regulatory mechanisms;ESCHERICHIA-COLI; TRP OPERON; REPRESSION; FEATURES; BINDING; MODEL SO - Journal of Theoretical Biology 2004 ;231(2):287-298 12392 UI - 6108 AU - Santillan M AU - Mackey MC AD - McGill Univ, Ctr Nonlinear Dynam, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Phys, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Math, Montreal, PQ H3G 1Y6, CanadaInst Politecn Nacl, Esc Sup Fis & Matemat, Dept Fis, Mexico City 07738, DF, MexicoSantillan, M, IPN, CINVESTAV, Dept Matemat, Mexico City, DF, Mexico TI - Influence of catabolite repression and inducer exclusion on the bistable behavior of the lac operon AB - A mathematical model of the lac operon which includes all of the known regulatory mechanisms, including external-glucose-dependent catabolite repression and inducer exclusion, as well as the time delays inherent to transcription and translation, is presented. With this model we investigate the influence of external glucose, by means of catabolite repression and the regulation of lactose uptake, on the bistable behavior of this system MH - Canada MH - Mexico|Distrito Federal PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 15 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000189377400003 L2 - AMP RECEPTOR PROTEIN; ESCHERICHIA-COLI; LACTOSE PROMOTER; TRANSCRIPTION; BINDING; ENZYME; SUBSTITUTION; SELECTION; MECHANISM; FEEDBACK SO - Biophysical Journal 2004 ;86(3):1282-1292 12393 UI - 6643 AU - Santillan M AU - Mackey MC AD - McGill Univ, Ctr Nonlinear Dynam, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Phys, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Dept Math, Montreal, PQ H3G 1Y6, CanadaMcGill Univ, Ctr Nonlinear Dynam, Montreal, PQ H3G 1Y6, CanadaSantillan, M, Inst Politecn Nacl, Esc Sup Fis & Matemat, Dept Fis, Mexico City 07738, DF, Mexico TI - Why the lysogenic state of phage lambda is so stable: A mathematical modeling approach AB - We develop a mathematical model of the phage lambda lysis/lysogeny switch, taking into account recent experimental evidence demonstrating enhanced cooperativity between the left and right operator regions. Model parameters are estimated from available experimental data. The model is shown to have a single stable steady state for these estimated parameter values, and this steady state corresponds to the lysogenic state. When the CI degradation rate (gamma(cl)) is slightly increased from its normal value (gamma(cl) similar or equal to 0.0 min(-1)), two additional steady states appear ( through a saddle-node bifurcation) in addition to the lysogenic state. One of these new steady states is stable and corresponds to the lytic state. The other steady state is an ( unstable) saddle node. The coexistence these two globally stable steady states ( the lytic and lysogenic states) is maintained with further increases of gamma(cl) until gamma(cl) similar or equal to 0.35 min(-1), when the lysogenic steady state and the saddle node collide and vanish ( through a reverse saddle node bifurcation) leaving only the lytic state surviving. These results allow us to understand the high degree of stability of the lysogenic state because, normally, it is the only steady state. Further implications of these results for the stability of the phage lambda switch are discussed, as well as possible experimental tests of the model MH - Canada MH - Mexico|Distrito Federal PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 16 U4 - Biophysics U5 - J;Article AV - English IS - 0006-3495 UR - ISI:000187565000009 L2 - BACTERIOPHAGE-LAMBDA; ESCHERICHIA-COLI; GENE-REGULATION; COUPLED ENERGETICS; CI-REPRESSOR; P-RM; MUTATIONS; CRO; PROMOTER; OPERATOR SO - Biophysical Journal 2004 ;86(1):75-84 12394 UI - 3866 AU - Santos-Ditto R AU - Santos-Franco JA AU - Pinos-Gavilanes M AD - Hosp Pediat Roberto Gilbert, Serv Neurochirurg, Guayaquil, EcuadorInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Serv Neurocirugia, Mexico City, DF, MexicoSantos-Ditto, R, Canar & Coronel,POB 09432, Guayaquil, Ecuador TI - Reply. Malignant fibrous histiocytoma of the meninges MH - Ecuador MH - Mexico|Distrito Federal PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Letter AV - Spanish IS - 0210-0010 UR - ISI:000224974400020 L2 - IRRADIATION; SARCOMAS SO - Revista de Neurologia 2004 ;39(8):798-799 12395 UI - 4856 AU - Santos-Ditto R AU - Santos-Franco JA AU - Pinos-Gavilanes M AD - Hosp Teodoro Maldonado Carbo, Serv Neurocirugia, Guayaquil, EcuadorHosp Pediat Roberto Gilbert, Serv Neurocirurgia, Guayaquil, EcuadorInst Nacl Neurol & Neurocirugia Manuel Velasco Su, Serv Neurocirugia, Mexico City, DF, MexicoSantos-Ditto, R, Canar & Coronel, POB 09432, Guayaquil, Ecuador TI - Malignant fibrous histiocytoma of the meninges. A case report MH - Ecuador MH - Mexico|Distrito Federal PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 2 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000222616200016 L2 - BRAIN; SARCOMAS; TUMORS; TISSUE; BONE; IRRADIATION; CHORDOMA SO - Revista de Neurologia 2004 ;38(12):1198-1200 12396 UI - 4465 AU - Santos GJE AU - Rivera M AU - Eiswirth M AU - Parmananda P AD - UAEM, Fac Ciencias, Cuernavaca, Morelos, MexicoMax Planck Gesell, Fritz Haber Inst, D-14195 Berlin, GermanySantos, GJE, UAEM, Fac Ciencias, Ave Univ 1001,Colonia Chamilpa, Cuernavaca, Morelos, Mexico TI - Effects of noise near a homoclinic bifurcation in an electrochemical system AB - The interaction of external noise with an electrochemical oscillator (anodic dissolution of iron) has been studied experimentally on both sides of the homoclinic bifurcation. In the oscillatory regime the regularity of the limit cycle behavior was destroyed with increasing noise amplitude until no periodicity was observable any more. In contrast, the response of the excitable state (fixed point regime) became more regular at intermediate noise levels MH - Germany MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000223784400007 L2 - STOCHASTIC RESONANCE; CLIMATIC TRANSITIONS; EXCITABLE MEDIA; OSCILLATORS; TRANSDUCTION; INFORMATION; DYNAMICS; DRIVEN; TIME SO - Physical Review e 2004 ;70(2): 12397 UI - 3842 AU - Santran S AU - Martinez-Rosas ME AU - Canioni L AU - Sarger L AD - Univ Bordeaux 1, CPMOH, F-33405 Talence, FranceUniv Autonoma Baja California, Ensenada, Baja California, MexicoSantran, S, Univ Bordeaux 1, CPMOH, F-33405 Talence, France TI - Characterization of optical nonlinearity in semiconductor photodiodes using cross-polarized autocorrelation AB - We study the various nonlinear effects produced during the detection of high-intensity signals in semiconductor photodiodes. Experimental results on few commercial detectors are compared with theoretical analysis. This analysis is based on the tensor coefficients from second- and third-order optical nonlinearities. Both contributions are measured using collinear orthogonally polarized beams in a pump-probe setup. The photoelectric signal is obtained for several orientations of the crystal optic axis MH - France MH - Mexico|Baja California PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9197 UR - ISI:000225223700008 L2 - interferometric autocorrelation;nonlinear susceptibility;second-harmonic generation (SHG);two-photon absorption (TPA;GAASP PHOTODIODE; PULSES SO - Ieee Journal of Quantum Electronics 2004 ;40(12):1687-1694 12398 UI - 3272 AU - Sanvicente-Anorve L AU - Lopez-Sanchez JL AU - guayo-Lobo A AU - Medrano-Gonzalez L AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Mexico City 04510, DF, MexicoInst Antart Chileno, Magallanes, ChileUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoSanvicente-Anorve, L, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Apdo Postal 70-305, Mexico City 04510, DF, Mexico TI - Morphometry and sexual dimorphism of the coastal spotted dolphin, Stenella attenuata graffmani, from Bahia de Banderas, Mexico AB - External measurements and size differences between the sexes were examined in the coastal spotted dolphin, Stenella attenuata graffmani, in Bahia de Banderas, on the Mexican Pacific coast. The dolphins were collected by local fishermen and 29 external characteristics were measured by members of the Marine Mammals Laboratory, University of Mexico. The length of each characteristic with respect to total length was analysed through adjustment of the data to a power equation. A stepwise discriminant analysis was applied to the absolute values and to those expressed as proportions to analyse the differences between the sexes. Results indicate that growth in these dolphins is generally negatively allometric, and most of the characteristics measured were, in both absolute and proportional terms, greater in male dolphins than in female dolphins. As found in many species of odontocetes, the discriminant analysis showed that the main differences between the sexes for this coastal subspecies include the relative positions of the umbilicus, the genital aperture and the anus. The morphometric data provided by this study, corresponding to 29 specimens of S. a. graffmani collected in a restricted locality of the Mexican Pacific coast, are particularly interesting to studies documenting latitudinal morphological differences in the coastal spotted dolphin MH - Chile MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0001-7272 UR - ISI:000226640100002 L2 - body characteristics;dolphins;eastern Pacific Ocean;sexual differences;Stenella attenuata;EASTERN TROPICAL PACIFIC; BOTTLE-NOSED DOLPHINS; GEOGRAPHIC-VARIATION; TURSIOPS-TRUNCATUS; CRANIAL MORPHOLOGY; OCEAN; LONGIROSTRIS; DELPHINIDAE; PORPOISE; DIFFERENTIATION SO - Acta Zoologica 2004 ;85(4):223-232 12399 UI - 3174 AU - Sapozhnikova Y AU - Garcia-Hernandez J AU - Mason Z AU - Schlenk D AD - Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521, USACtr Food Res & Dev, Sonora, MexicoCalif State Univ Long Beach, Dept Biol Sci, Long Beach, CA 90840, USA TI - Persistent bioaccumulative toxic (PBT) chemicals in pacific flyway migratory birds MH - Mexico|Sonora MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223712800105 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U40-U40 12400 UI - 3405 AU - Sapozhnikova Y AU - Garcia-Hernandez J AU - Schlenk D AD - Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521, USAConservat Nat Resources, Res Ctr Food & Dev, Sonora, Mexico TI - Accumulation of agricultural pesticides in bird eggs from the Colorado River delta MH - Mexico|Sonora MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655600192 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U60-U61 12401 UI - 4452 AU - Sarma SSS AU - Dumont HJ AU - Nandini S AD - Natl Autonomous Univ Mexico, Lab Aquat Zool, Div Res & Postgrad Studies, Los Reyes 54000, Tlalnepantla, MexicoState Univ Ghent, Lab Anim Ecol, B-9000 Ghent, BelgiumNatl Autonomous Univ Mexico, UIICSE, Div Res & Postgrad Studies, Los Reyes 54000, Tlalnepantla, MexicoSarma, SSS, Natl Autonomous Univ Mexico, Lab Aquat Zool, Div Res & Postgrad Studies, Campus Iztacala AP 314, Los Reyes 54000, Tlalnepantla, Mexico TI - Interactions between the anomopod cladocerans Ceriodaphnia dubia, C-cornuta, Simocephalus vetulus and S-serrulatus, the aphanoneurid worm Aeolosoma sp., and the fish Skiffia lermae: predation or competition, or both? AB - We tested the reciprocal effects of water conditioned by exudates of Aeolosoma sp. (Aphanoneura, Oligochaeta) and fish (Skiffa lermae: Goodeidae) and by the presence of Aeolosoma sp. on the population dynamics of four species of anomopod cladocerans (C. cornuta, C. dubia, S. serrulatus and S. vetulus) at 25 degreesC for 26 days using Chlorella vulgaris (1 x 10(6) cells ml(-1)) as a basic food for all. We found that, regardless of treatment, C. cornuta and C. dubia had a long initial phase of slow growth, followed by a rapid increase after the second week and that, regardless of treatment, C. dubia had a higher rate of population increase per day than C. cornuta. S. vetulus had a longer lag phase than S. serrulatus. Fish-conditioned water resulted in growth inhibition in S. serrulatus, but had no effect on S. vetulus, while Aeolosoma-conditioned water inhibited growth of S. vetulus but not that of S. serrulatus. Our results suggest a scale of responses of cladocerans to exposure to fish- and worm-conditioned water and to the presence of worms, ranging from a mild stimulation to no effects to inhibited growth. Kairomone-effects on body size of C. cornuta were not significant, but beak length was strongly influenced, and more by fish than by worm kairomones. In S. vetulus, differences in size were not significant. However, individuals grown in the presence of worms had higher biomass while those grown in the presence of fish and worm kairomones showed a decreased weight. Effects of worm exudates and of their live biomass on cladocerans were thus opposite in Simocephalus. In Ceriodaphnia dubia, in contrast, they were additive. Aeolosoma was depressed by all four cladocerans, although worms tried to penetrate the valves of the cladocerans to feed on the tissue inside. In doing so, they suffered significant casualties, especially from blows of the powerful post-abdomen of Simocephalus. The nature of the cladoceran-worm interaction is therefore far from simple: in addition to the 'chemical communication' that is present, it has a predatory component (worms trying to feed on cladocerans) but the reverse might also be true (cladocerans filtering out tissues of disrupted Aeolosoma). Since both worms and cladocerans feed on algae, exploitative competition also seems to be involved. In this, the worms appear to be the inferior partner, although none of the experiments lasted long enough to drive any of the competing partners to extinction MH - Belgium MH - Mexico|Estado De Mexico PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000223915900015 L2 - population growth;cladocera;fish and oligochaete kairomones;repellents;interference;predation;competition;POPULATION-GROWTH; ROTIFERA SO - Hydrobiologia 2004 ;526(1):147-156 12402 UI - 3268 AU - Sarmiento A AU - Murrieta-Cid R AU - Hutchinson S AD - Univ Illinois, Urbana, IL 61801, USA. ITESM, Zaragoza, DF, Mexico TI - A multi-robot strategy for rapidly searching a polygonal environment AB - In this paper we address the problem of finding an object in a polygonal environment as quickly as possible on average, with a team of mobile robots that can sense the environment. We show that for this problem, a trajectory that minimizes the distance traveled may not minimize the expected value of the time to find the object. We prove the problem to be NP-hard by reduction, therefore, we propose the heuristic of a utility function. We use this utility function to drive a greedy algorithm in a reduced search space that is able to explore several steps ahead without incurring too high a computational cost. We have implemented this algorithm and present simulation results for a multi-robot scheme MH - Mexico|Distrito Federal MH - USA T3 - ADVANCES IN ARTIFICIAL INTELLIGENCE - IBERAMIA 2004Lecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleasarmien@uiuc.edu rmurriet@itesm.mx seth@uiuc.edu0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBBO40 AV - English IS - 0302-9743 UR - ISI:000226646200048 SO - 2004 ;():484-493 12403 UI - 4789 AU - Satake H AU - Villegas E AU - Oshiro N AU - Terada K AU - Shinada T AU - Corzo G AD - Suntory Inst Bioorgan Res, Osaka 6188503, JapanOkinawa Prefectural Inst Hlth & Environm, Okinawa 9011202, JapanOsaka City Univ, Grad Sch Sci, Osaka 558, JapanCorzo, G, UNAM, Inst Biotechnol, Dept Mol Med & Bioproc, Av Univ 2001, Cuernavaca 62210, Morelos, Mexico TI - Rapid and efficient identification of cysteine-rich peptides by random screening of a venom gland cDNA library from the hexathelid spider Macrothele gigas AB - We identified novel 10 multi-cysteine peptides, namely Magi 7-16, from the spider Macrothele gigas by simple random cDNA screening of the venom gland. Mass analysis of the crude venom detected the mass numbers of the cross-linked forms of all peptides, confirming their presence in the venom. Magi 11, a C-terminus amidated peptide, was chemically synthesized and was indistinguishable from the native peptide proving the feasibility of the method for peptide identification. Moreover, toxicological assays showed diverse lethal or paralytic activities of these peptide toxins on mice and/or insects. (C) 2004 Elsevier Ltd. All rights reserved MH - Japan MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0041-0101 UR - ISI:000223022000005 L2 - spider;Macrothele gigas;peptide;toxin;cDNA;ion channel;AMINO-ACID SEQUENCE; ALPHA-TOXIN BINDING; PHONEUTRIA-NIGRIVENTER; LETHAL NEUROTOXIN; SODIUM-CHANNELS; PHARMACOLOGICAL CHARACTERIZATION; DELTA-ATRACOTOXINS; MOLECULAR-CLONING; CALCIUM-CHANNELS; ACTIVATION SO - Toxicon 2004 ;44(2):149-156 12404 UI - 5537 AU - Sathyamoorthy R AU - Senthilarasu S AU - Lalitha S AU - Subbarayan A AU - Natarajan K AU - Mathew X AD - Kongunadu Arts & Sci Coll, Res & Dev, Dept Phys, Coimbatore 641029, Tamil Nadu, IndiaUNAM, CIE, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoSathyamoorthy, R, Kongunadu Arts & Sci Coll, Res & Dev, Dept Phys, Coimbatore 641029, Tamil Nadu, India TI - Electrical conduction properties of flash evaporated ZincPhthalocyanine (ZnPc) thin films AB - Solar energy as the principle source has become very attractive, as it is abundantly available, can be tapped locally, pollution free and commercially viable over a period. Solar energy may be converted to other forms of higher-grade energy through one of several methods such as photothermal, photochemical, photoelectrochemical and photovoltaic (PV). Among these, as noted above the cleanest and most direct and efficient and of converts to electrical power is with the help of PV or solar cell devices. Photovoltaics are one of the hottest areas of research today. Nowadays organic material finds greater importance in the PV cell fabrications. Among the available organic materials ZincPhthalocyanine is a promising candidate for the solar cell applications, because of its easy synthesization and non-toxic to the environment. The major part of incident light in the visible region effectively contributes to photocarrier generation and the excited ZnPc molecules play an important role in PV effect. In this paper, we have reported electrical transport properties of flash evaporated ZincPhthalocyanine thin films have been reported. DC conduction mechanism in these films (Al-ZnPc-Al structure) was studied at different temperatures. The field dependence behaviour on activation energy and possible conduction mechanism in the ZnPc films under DC field has been discussed. (C) 2004 Elsevier B.V. All rights reserved MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000221289000017 L2 - ZincPhthalocyanine;organic semiconductor;electrical;flash evaporation;Poole-Frankel;thin film;PHTHALOCYANINES; SYSTEMS SO - Solar Energy Materials and Solar Cells 2004 ;82(1-2):169-177 12405 UI - 5345 AU - Saucedo R AU - Macias JL AU - Bursik M AD - Natl Autonomous Univ Mexico, Inst Geofis, Coyoacan 04510, MexicoUASLP, Inst Geol, San Luis Potosi 78240, MexicoSUNY Buffalo, Dept Geol, Buffalo, NY 14260, USAMacias, JL, Natl Autonomous Univ Mexico, Inst Geofis, Coyoacan 04510, Mexico TI - Pyroclastic flow deposits of the 1991 eruption of Volcin de Colima, Mexico AB - The April 16, 1991, eruption of Volcan de Colima represents a classical example of partial dome collapse with the generation of progressively longer-runout, Merapi-type pyroclastic flows that traveled up to 4 km along the El Cordoban gullies (East, Central and West). The flows filled the gullies with block-and-ash flow deposits up to 10 m thick, of which, after 7 years of erosion, only remnants remained in the El Cordoban West and East gullies. The El Cordoban Central gully, however, provided a well-preserved and incised longitudinal section of the 1991 deposits. The deposits were emplaced as proximal and distal facies, separated by a change in slope angle from >30degrees to <20degrees. The proximal facies consists of massive, clast-supported flow units (up to I m thick) with andesite blocks locally supported by a matrix of coarse ash and devoid of segregation structures or grading. The distal facies consists of a massive, matrix-supported deposit up to 8 m thick, which contains dispersed andesite blocks in a fine ash matrix. In the distal facies, a train of blocks marks flow-unit upper boundaries and, although sorting is poor, some grading is present. Thin, finely stratified, or dune-bedded layers of fine ash material are locally present above or below units of both facies. Sedimentologic parameters show that the size or fraction of large pyroclasts (larger than -1 phi) decreases from proximal to distal facies, as the percentage of matrix (0 to 4 0) increases, especially immediately beyond the break in slope. We propose that the propagation of the Colima pyroclastic flows is critically dependent on local slope angle, the presence of erodible slope debris, and the decrease in grain size with distance from the vent. The progressive fining is probably caused by some combination of erosion, clast breakup and deposition of larger pyroclasts, and is itself influenced by the slope angle. In the proximal region, the flows moved as granular avalanches, in which interacting grains ground each other and erosion occurred to produce an overriding dilute ash cloud. The maximum runout distance of the avalanches was controlled by the angle of repose of the material, and the volume and grain size of source and eroded material. Because the slope angle is close to the repose angle for this-debris, granular avalanches were not able to propagate far beyond the change in slope. If, however, an avalanche had enough mass in finer grain size fractions, at least part of the flow continued beyond the break in slope and across the volcano apron, propagating in a turbulent state and depositing surge layers, or in an otherwise settling-modified state and depositing block-and-ash flow layers MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000221766200001 L2 - Merapi-type pyroclastic flow;granular flow;facies transition;Colima, Mexico;MOUNT ST-HELENS; DE-COLIMA; VOLCANO; AVALANCHES; GENERATION; BEHAVIOR; MOBILITY; SURGES; MODEL; BLOCK SO - Bulletin of Volcanology 2004 ;66(4):291-306 12406 UI - 5149 AU - Savich VI AU - Kaurichev IS AU - Shishov LL AU - Nikol'skii YN AU - Romanchik EA AD - KA Timiryazev Agr Acad, Moscow 127550, RussiaRussian Acad Agr Sci, Dokuchaev Soil Sci Inst, Moscow 109017, RussiaUniv Chapingo, MX-56230 Chapingo, MexicoSavich, VI, KA Timiryazev Agr Acad, Ul Timiryazeva 49, Moscow 127550, Russia TI - Agronomic evaluation of the redox status of soils AB - Agronomic evaluation of the redox status of soils was performed in long-term studies. An integrated evaluation of the redox status of soils was proposed on the basis of their static parameters and redox processes and regimes. Schedules were developed for the redox and buffer capacities of soils. It was found experimentally that the agronomic evaluation of the fractional composition of redox systems and hysteresis is promising. For optimizing the situation, the application of redox regulators to the soil-plant system is recommended, in addition to conventional techniques MH - Mexico|Estado De Mexico MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Soil Science U5 - J;Article AV - English IS - 1064-2293 UR - ISI:000222292800008 SO - Eurasian Soil Science 2004 ;37(6):608-617 12407 UI - 2892 AU - Sawado T AU - Rincon-Arano H AU - Halow J AU - Groudine M AD - Fred Hutchinson Canc Res Ctr, Div Basic Sci, Seattle, WA 98104, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, Mexico TI - Characterization of mammalian cellular memory MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000225127501615 SO - Blood 2004 ;104(11):448A-449A 12408 UI - 3579 AU - Sawkins MC AU - Farmer AD AU - Hoisington D AU - Sullivan J AU - Tolopko A AU - Jiang Z AU - Ribaut JM AD - CIMMYT, Mexico City 06600, DF, MexicoNCGR, Santa Fe, NM 87505, USASawkins, MC, CIMMYT, Apartado Postal 6-641, Mexico City 06600, DF, Mexico TI - Comparative Map and Trait Viewer (CMTV): an integrated bioinformatic tool to construct consensus maps and compare QTL and functional genomics data across genomes and experiments AB - In the past few decades, a wealth of genomic data has been produced in a wide variety of species using a diverse array of functional and molecular marker approaches. In order to unlock the full potential of the information contained in these independent experiments, researchers need efficient and intuitive means to identify common genomic regions and genes involved in the expression of target phenotypic traits across diverse conditions. To address this need, we have developed a Comparative Map and Trait Viewer (CMTV) tool that can be used to construct dynamic aggregations of a variety of types of genomic datasets. By algorithmically determining correspondences between sets of objects on multiple genomic maps, the CMTV can display syntenic regions across taxa, combine maps from separate experiments into a consensus map, or project data from different maps into a common coordinate framework using dynamic coordinate translations between source and target maps. We present a case study that illustrates the utility of the tool for managing large and varied datasets by integrating data collected by CIMMYT in maize drought tolerance research with data from public sources. This example will focus on one of the visualization features for Quantitative Trait Locus (QTL) data, using likelihood ratio (LR) files produced by generic QTL analysis software and displaying the data in a unique visual manner across different combinations of traits, environments and crosses. Once a genomic region of interest has been identified, the CMTV can search and display additional QTLs meeting a particular threshold for that region, or other functional data such as sets of differentially expressed genes located in the region; it thus provides an easily used means for organizing and manipulating data sets that have been dynamically integrated under the focus of the researcher's specific hypothesis MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Plant Sciences U5 - J;Article AV - English IS - 0167-4412 UR - ISI:000225900900010 L2 - consensus maps;gene display;integrated bioinformatic tools;marker assisted selection;QTL display;DROUGHT CONDITIONS; TROPICAL MAIZE; LOCI; IDENTIFICATION; PLANTS SO - Plant Molecular Biology 2004 ;56(3):465-480 12409 UI - 6146 AU - Sazaki G AU - Moreno A AU - Nakajima K AD - Tohoku Univ, Interdisciplinary Res Ctr, Aoba Ku, Sendai, Miyagi 9808578, JapanUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoTohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, JapanSazaki, G, Tohoku Univ, Interdisciplinary Res Ctr, Aoba Ku, Sendai, Miyagi 9808578, Japan TI - Novel coupling effects of the magnetic and electric fields on protein crystallization AB - Novel effects of combining the magnetic and internal electric fields on protein crystallization were studied in this report. Homogeneity in crystal size and ratio of magnetically orientated crystals were significantly increased, when a homogeneous magnetic field of 10T and an internal electric field (a direct current of 2 muA) were applied to the crystallization of hen egg-white lysozyme at the same time. When the directions of the magnetic field and the electric current were parallel, there were not significant effects observed. This result suggests that the Lorenz force is responsible for the coupling effects of the magnetic and internal electric fields. (C) 2003 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000189098700077 L2 - biocrystallization;internal electric field;magnetic field;proteins;LYSOZYME; GROWTH; NUCLEATION; CRYSTALS SO - Journal of Crystal Growth 2004 ;262(1-4):499-502 12410 UI - 2279 AU - Schamphelaere D AU - Osstyn E AU - Anadon JPL AD - Alcatel, Fixed Solut Div, Marketing Grp, Antwerp, BelgiumSchamphelaere, D, Fixed Solut Div Latin Amer, Mexico City, DF, Mexico TI - Applications for emerging countries: Bringing affordable voice to the market MH - Belgium MH - Mexico|Distrito Federal PB - PARIS: COMPAGNIE FINANCIERE ALCATEL RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1267-7167 UR - ISI:000229257900007 SO - Alcatel Telecommunications Review 2004 ;(3):338-343 12411 UI - 3339 AU - Schatti B AU - Ineich I AD - Museum Natl Hist Nat, Dept Ecol & Gest Biodivers, F-75005 Paris, FranceSchatti, B, Apartado Postal 383, San Miguel De Allende 37700, Gto, Mexico TI - A new racer of the genus Platyceps Blyth from Djibouti (Reptilia : Squamata : Colubrinae) AB - A new racer of the genus Platyceps Blyth from Djibouti (Reptilia: Squamata: Colubrinae). - Platyceps afarensis sp. n. is described on the basis of two specimens from Djibouti. The new species is compared with presumed congeneric racers from Eastern Africa. P. afarensis is probably most closely related to P. rhodorachis auct. The systematics of some East African racers are briefly reviewed MH - France MH - Mexico|Guanajuato PB - GENEVA 6: MUSEUM HISTOIRE NATURELLE RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0035-418X UR - ISI:000226515200001 L2 - Platyceps afarensis sp n.;morphology;systematics;P. florulentus group;P. rhodorachis;Horn of Africa;Djibouti;WHIP SNAKES; SYSTEMATICS SO - Revue Suisse de Zoologie 2004 ;111(4):685-690 12412 UI - 3340 AU - Schatti B AU - McCarthy C AD - Nat Hist Museum, London SW7 5BD, EnglandSchatti, B, Apartado Postal 383, San Miguel De Allende 37700, Gto, Mexico TI - Saharo-Arabian racers of the Platyceps rhodorachis complex - description of a new species (Reptilia : Squamata : Colubrinae) AB - Saharo-Arabian racers of the Platyceps rhodorachis complex - description of a new species (Reptilia: Squamata: Colubrinae). - Platyceps saharicus sp. n. is described from northern Africa and the Near East (Sinai to western Jordan). This species is morphologically distinct from P. rhodorachis (Jan) and a yet unassigned taxon of the rhodorachis complex. The latter is sympatric with the Sahara racer in Israel, Jordan, and Palestine MH - United Kingdom MH - Mexico|Guanajuato PB - GENEVA 6: MUSEUM HISTOIRE NATURELLE RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0035-418X UR - ISI:000226515200002 L2 - Platyceps saharicus sp n.;P. rhodorachis;Platyceps sp.;incertae sedis;distribution;systematics SO - Revue Suisse de Zoologie 2004 ;111(4):691-705 12413 UI - 5188 AU - Schippers S AU - Muller A AU - Phaneuf RA AU - van Zoest T AU - Alvarez I AU - Cisneros C AU - Emmons ED AU - Gharaibeh MF AU - Hinojosa G AU - Schlachter AS AU - Scully SWJ AD - Univ Giessen, Inst Kernphys, D-35392 Giessen, GermanyUniv Nevada, Dept Phys, Reno, NV 89557, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USASchippers, S, Univ Giessen, Inst Kernphys, Leihgesterner Weg 217, D-35392 Giessen, Germany TI - Threshold truncation of a 'giant' dipole resonance in photoionization of Ti3+ AB - Photoionization of triply charged titanium ions was investigated using the merged photon-ion beam technique at a synchrotron light source. The experimental photon energy range 42.6-49.4 eV encompasses the threshold for the photoionization of Ti3+(3p(6) 3d D-2(3/2)) ground-state ions at 43.267 eV. Prominent resonance features due to 3p --> 3d and 3p --> 4s excitations are observed with the strongest one being the 'giant' 3p(5) (3d(2 3) F) F-2 dipole resonance which has a width of 1.5 eV. Since it is located only 0.2 eV above the ionization threshold a cut-off of this resonance is observed in photoionization. By employing the principle of detailed balance the results are compared with an earlier experimental study of the time-reversed Ti4+ photorecombination. The comparison clarifies the giant resonance's role in photorecombination and yields state-selective photoionization and photorecombinaton cross sections on an absolute scale MH - Germany MH - Mexico|Morelos MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000222193800002 L2 - CONFIGURATION-INTERACTION; CROSS-SECTIONS; IONS SO - Journal of Physics B-Atomic Molecular and Optical Physics 2004 ;37(10):L209-L216 12414 UI - 5769 AU - Schlachter AS AU - Sant'Anna MM AU - Covington AM AU - Aguilar A AU - Gharaibeh MF AU - Emmons ED AU - Scully SWJ AU - Phaneuf RA AU - Hinojosa G AU - Alvarez I AU - Cisneros C AU - Muller A AU - McLaughlin BM AD - Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720, USAHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USAUniv Giessen, Inst Kernphys, D-35392 Giessen, GermanyUNAM, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoUniv Nevada, Dept Phys, Reno, NV 89557, USALake Tahoe Community Coll, Dept Phys, S Lake Tahoe, CA 96150, USASchlachter, AS, Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, MS 7-222, Berkeley, CA 94720 USA TI - Lifetime of a K-shell vacancy in atomic carbon created by 1s -> 2p photoexcitation of C+ AB - Lifetimes for K-shell vacancy states in atomic carbon have been determined by measurement of the natural linewidth of the 1s --> 2p photoexcited states of C+ ions. The K-shell vacancy states produced by photoionization of atomic carbon are identical to those produced by 1s --> 2p photoexcitation of a C+ ion: 1s2S(2) 2p(2) D-2, P-2, and S-2 autoionizing states occur in both cases. These vacancy states stabilize by emission of an electron to produce C2+ ions. Measurements are reported for the lifetime of the 1s2s(2) 2p(2) D-2, P-2 and S-2 autoionizing states of C+: 6.3 +/- 0.9 fs, 11.2 +/- 1.1 fs and 5.9 +/- 1.3 fs respectively. Knowledge of such lifetimes is important for comparative studies of the lifetimes of K-shell vacancies in carbon-containing molecules, benchmarking theory, and interpreting satellite x-ray spectra from astrophysical sources such as x-ray binaries. Absolute cross sections were measured for both ground-state and metastable-state ions providing a stringent test of state-of-the-art theoretical calculations MH - USA MH - Germany MH - Mexico|Morelos PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000220636000003 L2 - FLUORESCENCE YIELDS; AUGER DECAY; PHOTOIONIZATION; SPECTROSCOPY; SEQUENCE; ELECTRON; OXYGEN; PHOTOABSORPTION; TRANSITIONS; IONIZATION SO - Journal of Physics B-Atomic Molecular and Optical Physics 2004 ;37(5):L103-L109 12415 UI - 3466 AU - Schliserman P AU - Ovruski S AU - Colin C AU - Norrbom AL AU - Aluja M AD - Consejo Nacl Invest Cient & Tecn, INSUE, Fdn Miguel Lillo, CIRPON, RA-4000 San Miguel De Tucuman, Tucuman, ArgentinaUSDA, ARS, Systemat Entomol Lab, Smithsonian Inst, Washington, DC 20560, USAInst Ecol, Xalapa 91000, Veracruz, MexicoSchliserman, P, Consejo Nacl Invest Cient & Tecn, INSUE, Fdn Miguel Lillo, CIRPON, Miguel Lillo 251, RA-4000 San Miguel De Tucuman, Tucuman, Argentina TI - First report of Juglans australis (Juglandaceae) as a natural host plant for Anastrepha schultzi (Diptera : Tephritidae) with notes on probable parasitism by Doryctobracon areolatus, D-Brasiliensis, Opius bellus (Braconidae) and Aganaspis pelleranoi (Figitidae) MH - Argentina MH - Mexico|Veracruz MH - USA PB - LUTZ: FLORIDA ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0015-4040 UR - ISI:000226262600030 L2 - CERATITIS-CAPITATA DIPTERA; NORTHWESTERN ARGENTINA; FRATERCULUS SO - Florida Entomologist 2004 ;87(4):597-599 12416 UI - 5000 AU - Schnaas L AU - Rothenberg SJ AU - Flores MF AU - Martinez S AU - Hernandez C AU - Osorio E AU - Perroni E AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoNatl Inst Perinatol, Mexico City, DF, MexicoCharles R Drew Univ Med & Sci, Los Angeles, CA 90059, USARothenberg, SJ, Inst Nacl Salud Publ, Avenida Univ 655,Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Blood lead secular trend in a cohort of children in Mexico City (1987-2002) AB - We determined the secular trend in blood lead levels in a cohort of 321 children born in Mexico City between 1987 and 1992. Blood lead level was measured every 6 months during a 10-year period. We modeled the effect of yearly air lead concentration nested within the calendar year in which the child was born, family use of lead-glazed pottery, socioeconomic status, year in which the child was born, age of the child at the time of blood lead measurement, place of residence, and an indicator variable for subjects with complete or incomplete blood lead values. The yearly mean of air lead of the Valley of Mexico decreased from its highest level of 2.80 mug/m(3) in 1987 to 0.07 mug/m(3) in 2002. The contribution of air lead to blood lead according to year of birth was strongest for subjects born in 1987 and fell to nearly zero for children born in 1992. The geometric mean of the entire cohort rose from 8.4 mug/dL in the first year of life to 10.1 mug/dL in the second and decreased thereafter until it reached 6.4 mug/dL at 10 years of age. Children of families who used lead-glazed ceramics had blood lead levels 18.5% higher than did children of nonusing families. Children who belonged to the lowest socioeconomic levels had blood lead levels 32.2% higher than did those of highest socioeconomic levels. Children who lived in the northeast part of the city had blood lead levels 10.9% higher compared with those who lived in the southwest MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - RES TRIANGLE PK: US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0091-6765 UR - ISI:000222482300033 L2 - DETERMINANTS; GASOLINE; EXPOSURE; POPULATION; DIETARY; PETROL SO - Environmental Health Perspectives 2004 ;112(10):1110-1115 12417 UI - 5924 AU - Schneider H AU - Schuettpelz E AU - Pryer KM AU - Cranfill R AU - Magallon S AU - Lupia R AD - Duke Univ, Dept Biol, Durham, NC 27708, USAUniv Gottingen, Albert von Haller Inst Pflanzenwissensch, Abt Systemat Bot, D-37073 Gottingen, GermanyUniv Calif Berkeley, Univ Herbarium, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoUniv Oklahoma, Sam Noble Oklahoma Museum Nat Hist, Norman, OK 73072, USAUniv Oklahoma, Sch Geol & Geophys, Norman, OK 73072, USAPryer, KM, Duke Univ, Dept Biol, Durham, NC 27708, USA TI - Ferns diversified in the shadow of angiosperms AB - The rise of angiosperms during the Cretaceous period is often portrayed as coincident with a dramatic drop in the diversity and abundance of many seed-free vascular plant lineages, including ferns(1-5). This has led to the widespread belief that ferns, once a principal component of terrestrial ecosystems(6), succumbed to the ecological predominance of angiosperms and are mostly evolutionary holdovers from the late Palaeozoic/early Mesozoic era. The first appearance of many modern fern genera in the early Tertiary fossil record implies another evolutionary scenario; that is, that the majority of living ferns resulted from a more recent diversification(7-10). But a full understanding of trends in fern diversification and evolution using only palaeobotanical evidence is hindered by the poor taxonomic resolution of the fern fossil record in the Cretaceous(11). Here we report divergence time estimates for ferns and angiosperms based on molecular data, with constraints from a reassessment of the fossil record. We show that polypod ferns (>80% of living fern species) diversified in the Cretaceous, after angiosperms, suggesting perhaps an ecological opportunistic response to the diversification of angiosperms, as angiosperms came to dominate terrestrial ecosystems MH - Germany MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 85 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000220540100040 L2 - DIVERGENCE TIMES; EVOLUTION; SEQUENCES; ABUNDANCE; PLANTS; LIGHT; RATES; RBCL SO - Nature 2004 ;428(6982):553-557 12418 UI - 3946 AU - Scholz T AU - guirre-Macedo ML AU - Choudhury A AD - Acad Sci Czech Republ, Inst Parasitol, CR-37005 Ceske Budejovice, Czech RepublicCINVESTAV, IPN, Unidad Merida, Merida, Yucatan, MexicoSt Norbert Coll, Div Nat Sci, De Pere, WI 54115, USAScholz, T, Acad Sci Czech Republ, Inst Parasitol, Branisovska 31, CR-37005 Ceske Budejovice, Czech Republic TI - Auriculostoma astyanace N. gen., N. sp (Digenea : Allocreadiidae), from the banded astyanax, Astyamax fasciatus (Characiformes : Characidae), from Nicaragua, with a reevaluation of neotropical Crepidostomum spp AB - Auriculostoma n. gen. (Trematoda: Allocreadiidae) is proposed for Auriculostoma astyanace n. sp. from the intestine of the characid fish Astyanax fasciatus in the Atlantic coastal drainages of Nicaragua. The new genus differs from all papillose allocreadiid genera, except Bunoderella, in possessing 2 pairs of muscular oral papillae (instead of I or 3), of which the ventrolateral pair is moderately developed and the dorsolateral papillae are long and auricular. Auriculostoma differs from Bunoderella Schell, 1964, in having lateral vitelline follicles, completely separated or confluent only in the posttesticular region, a uterus limited to the pretesticular region or with a few eggs at the level of the testes, and a long cirrus sac that overlaps the acetabulum or usually reaches posteriorly to the ovarian level. Three other allocreadiid species, all from South American freshwater fishes and each of which had previously been placed in Crepidostomum, are transferred to Auriculostoina based on the presence of the diagnostic muscular oral papillae. These include Crepidostomum platense Szidat, 1954, C. macrorchis Szidat, 1954, and C. stenopteri Mane-Garzon and Gascon, 1973. Diagnostic features for Auriculostoma also include mainly pretesticular uterus, lateral vitellaria with variation in posttesticular confluence, and tandem testes. The genus appears to be typically associated with neotropical siluriforms (catfishes) and characiforms (tetras) MH - Czech Republic MH - Mexico|Yucatan MH - USA PB - LAWRENCE: AMER SOC PARASITOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Parasitology U5 - J;Article AV - English IS - 0022-3395 UR - ISI:000224971400027 SO - Journal of Parasitology 2004 ;90(5):1128-1132 12419 UI - 5706 AU - Scholz T AU - Schneider GA AU - Munoz-Saldana J AU - Swain MV AD - Tech Univ Hamburg, Adv Ceram Grp, D-2100 Hamburg, GermanyIPN, Unidad Queretaro, Ctr Invest & Estudios Avanzados, Queretaro 76230, MexicoUniv Sydney, Dept Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, AustraliaScholz, T, Tech Univ Hamburg, Adv Ceram Grp, D-2100 Hamburg, Germany TI - Fracture toughness from submicron derived indentation cracks AB - Indentation tests with loads between 0.5 and 10 mN were performed on fused quartz, (0001) oriented sapphire and (001) oriented barium titanate. The resulting submicron cracks were used to determine the fracture toughness K-IC of the tested samples. The indentation crack length method was applicable, but a c/a dependency of the constant of proportionality was found. In addition, a very effective and simple approach-using the extra penetration of the indenter, due to the formation of cracks, so called pop-in-was used to determine K-IC. (C) 2004 American Institute of Physics MH - Australia MH - Germany MH - Mexico|Queretaro PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000220975800029 L2 - POP-IN; NANOINDENTATION; CERAMICS SO - Applied Physics Letters 2004 ;84(16):3055-3057 12420 UI - 4476 AU - Schon T AU - Eimberger G AU - Negesse Y AU - Pando RH AU - Sundqvist T AU - Britton S AD - Linkoping Univ, Fac Hlth Sci, Dept Mol & Clin Med, Div Med Microbiol, SE-58185 Linkoping, SwedenKarolinska Hosp, Dept Pathol, S-10401 Stockholm, SwedenArmauer Hansen Res Inst, Addis Ababa, EthiopiaInst Nutr, Dept Expt Pathol, Mexico City, DF, MexicoKarolinska Inst, Dept Infect Dis, S-10401 Stockholm, SwedenSchon, T, Linkoping Univ, Fac Hlth Sci, Dept Mol & Clin Med, Div Med Microbiol, SE-58185 Linkoping, Sweden TI - Local production of nitric oxide in patients with tuberculosis AB - Nitric oxide (NO), produced by the inducible nitric oxide synthase (iNOS), is important in host defence against Mycobacterium tuberculosis in rodents, but the presence of high-output NO production in human tuberculosis has been controversial. We investigated iNOS and nitrotyrosine (Ntyr) expression in pleural (n = 7), pulmonary (n = 5) and lymph node biopsies (n = 5) from untreated, newly diagnosed tuberculosis patients. Many iNOS and Ntyr reactive macrophages were observed in granulomas, including Langhans giant cells, indicating high-output NO production at the primary site of disease in tuberculosis MH - Ethiopia MH - Mexico|Distrito Federal MH - Sweden PB - PARIS: INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D) RP - NOT IN FILE U3 - TC 5 U4 - Infectious Diseases;Respiratory System U5 - J;Article AV - English IS - 1027-3719 UR - ISI:000223680300016 L2 - iNOS;nitric oxide;nitrotyrosine;tuberculosis;granuloma;PULMONARY TUBERCULOSIS; ALVEOLAR MACROPHAGES; SYNTHASE; EXPRESSION SO - International Journal of Tuberculosis and Lung Disease 2004 ;8(9):1134-1137 12421 UI - 5948 AU - Schon T AU - Hernandez-Pando R AU - Baquera-Heredia J AU - Negesse Y AU - Becerril-Villanueva LE AU - Leon-Contreras JC AU - Sundqvist T AU - Britton S AD - Fac Hlth Sci, Dept Med Microbiol, S-58185 Linkoping, SwedenKalmar Cty Hosp, Kalmar, SwedenInst Nacl Nutr Salvador Zubiran, Dept Pathol, Expt Pathol Lab, Mexico City 14000, DF, MexicoArmauer Hansen Res Inst, Addis Ababa, EthiopiaKarolinska Inst, Dept Infect Dis, Stockholm, SwedenSchon, T, Fac Hlth Sci, Dept Med Microbiol, S-58185 Linkoping, Sweden TI - Nitrotyrosine localization to dermal nerves in borderline leprosy AB - Background Nerve damage is a common and disabling feature of leprosy, with unclear aetiology. It has been reported that the peroxidizing agents of myelin lipids-nitric oxide (NO) and peroxynitrite-are produced in leprosy skin lesions. Objectives To investigate the localization of nitrotyrosine (NT)-a local end-product of peroxynitrite-in leprosy lesions where dermal nerves are affected by a granulomatous reaction. Methods We investigated by immunohistochemistry and immunoelectron microscopy the localization of the inducible NO synthase (iNOS) and NT in biopsies exhibiting dermal nerves from patients with untreated leprosy. Results There were abundant NT-positive and iNOS-positive macrophages in the borderline leprosy granulomas infiltrating peripheral nerves identified by light microscopy, S-100 and neurofilament immunostaining. Immunoelectron microscopy showed NT reactivity in neurofilament aggregates and in the cell wall of Mycobacterium leprae. Conclusions Our results suggest that NO and peroxynitrite could be involved in the nerve damage following borderline leprosy MH - Ethiopia MH - Mexico|Distrito Federal MH - Sweden PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Dermatology U5 - J;Article AV - English IS - 0007-0963 UR - ISI:000220356600024 L2 - immunohistochemistry;inducible nitric oxide synthase;leprosy;nitrotyrosine;peripheral nerves;peroxynitrite;NITRIC-OXIDE SYNTHASE; EXPRESSION; LESIONS SO - British Journal of Dermatology 2004 ;150(3):570-574 12422 UI - 5837 AU - Schondube JE AU - del Rio CM AD - Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAUNAM, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoUniv Wyoming, Dept Zool & Physiol, Laramie, WY 82071, USASchondube, JE, Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA TI - Sugar and protein digestion in flowerpiercers and hummingbirds: a comparative test of adaptive convergence AB - Flowerpiercers are the most specialized nectar-feeding passerines in the Neotropics. They are nectar robbers that feed on the sucrose-rich diet of hummingbirds. To test the hypothesis that flowerpiercers have converged with hummingbirds in digestive traits, we compared the activity of intestinal enzymes and the gut nominal area of cinnamon-bellied flowerpiercers (Diglossa baritula) with those of eleven hummingbird species. We measured sucrase, maltase, and aminopeptidase-N activities. To provide a comparative context, we also compared flowerpiercers and hummingbirds with 29 species of passerines. We analyzed enzyme activity using both standard allometric analyses and phylogenetically independent contrasts. Both approaches revealed the same patterns. With the exception of sucrase activity, hummingbirds' digestive traits were indistinguishable from those of passerines. Sucrase activity was ten times higher in hummingbirds than in passerines. Hummingbirds and passerines also differed in the relationship between intestinal maltase and sucrase activities. Maltase activity was two times higher per unit of sucrase activity in passerines than in hummingbirds. The sucrase activity of D. baritula was much lower than that of hummingbirds, and not unlike that expected for a passerine of its body mass. With the exception of aminopeptidase-N activity, the digestive traits of D. baritula were not different from those of other passerines MH - USA MH - Mexico|Michoacan PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 4 U4 - Physiology;Zoology U5 - J;Article AV - English IS - 0174-1578 UR - ISI:000220561100008 L2 - comparative method;Diglossa baritula;hummingbirds;sucrase activity;sugar and protein digestion;NECTAR-FEEDING BIRDS; INTESTINAL BRUSH-BORDER; DIETARY MODULATION; TROPICAL HUMMINGBIRDS; PHYLOGENETIC ANALYSIS; MALTASE-GLUCOAMYLASE; ENZYMES; ENERGETICS; DISACCHARIDASES; RESPONSES SO - Journal of Comparative Physiology B-Biochemical Systemic and Environmental Physiology 2004 ;174(3):263-273 12423 UI - 2078 AU - Schreck DM AU - Prakash A AU - Bauch T AU - Viscito M AU - Mosesi G AD - Univ Med & Dent New Jersey, Newark, NJ 07103, USABrooke Army Med Ctr, San Antonio, TX, USASt Georges Med Sch, St Georges, GrenadaUniv Autonoma Guadalajara, Guadalajara, Mexico TI - The eigenvalue model as an electrical marker in the prediction of acute myocardial infarction in measured and derived electrocardiograms MH - Grenada MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Hematology;Peripheral Vascular Disease U5 - J;Meeting Abstract AV - English IS - 0009-7322 UR - ISI:000224783503544 SO - Circulation 2004 ;110(17):668-668 12424 UI - 4664 AU - Schuster WJ AU - Beers TC AU - Michel R AU - Nissen PE AU - Garcia G AD - UNAM, Observ Astron Nacl, Ensenada 22800, Baja California, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoMichigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USAAarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, DenmarkSchuster, WJ, UNAM, Observ Astron Nacl, Apartado Postal 877, Ensenada 22800, Baja California, Mexico TI - uvby-beta photometry of high-velocity and metal-poor stars - X. Stars of very low metal abundance: Observations, reddenings, metallicities, classifications, distances, and relative ages AB - uvby(-beta) photometry has been obtained for an additional 411 very metal-poor stars selected from the HK survey, and used to derive basic parameters such as interstellar reddenings, metallicities, photometric classifications, distances, and relative ages. Interstellar reddenings adopted from the Schlegel et al. (1998) maps agree well with those from the intrinsic-color calibration of Schuster & Nissen (1989). [Fe/H] values are obtained from the CaII K line index of the HK survey combined with the uvby and UBV photometry. The c(0), (b-y)(0) diagram is seen to be very useful for classifying these very metal-poor field stars into categories similar to those derived from globular cluster color-magnitude diagrams; the HK survey has detected metal-poor candidates extending from the red-giant to the blue-horizontal branch, and from the horizontal branch to subluminous stars. Distances derived from UBV photometry agree reasonably well with those from uvby, considering the paucity of good calibrating stars and the extrapolations required for the most metal-poor stars. These very metal-poor stars are compared to M 92 in the c(0), (b-y)(0) diagram, and evidence is seen for field stars 1-3 Gyrs younger than this globular cluster; uncertainties in the [Fe/H] scale for M 92 would only tend to increase this age difference. Significant reddening uncertainties for M 92 are unlikely but might decrease this difference. The significance of these younger very metal-poor stars is discussed in the context of Galactic evolution, mentioning such possibilities as hierarchical star-formation/mass-infall of very metal-poor material and/or accretion events whereby this material has been acquired from other (dwarf) galaxies with different formation and chemical-enrichment histories MH - Denmark MH - Mexico|Baja California MH - Mexico|Puebla MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223348300021 L2 - stars : abundances;stars : distances;stars : fundamental parameters;ISM : dust, extinction;Galaxy : evolution;Galaxy : halo;PHOTOELECTRIC UBV PHOTOMETRY; OBJECTIVE-PRISM SURVEY; A-TYPE STARS; MEDIUM-RESOLUTION SPECTRA; ALPHA-ELEMENT ABUNDANCES; HORIZONTAL-BRANCH STARS; CARBON-RICH OBJECTS; NORTHERN HK SURVEY; GLOBULAR-CLUSTERS; GALACTIC HALO SO - Astronomy & Astrophysics 2004 ;422(2):527-543 12425 UI - 4523 AU - Schwarz DJ AU - Terrero-Escalante CA AD - CERN, Dept Phys, Div Theory, CH-1211 Geneva 23, SwitzerlandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoSchwarz, DJ, CERN, Dept Phys, Div Theory, CH-1211 Geneva 23, Switzerland TI - Primordial fluctuations and cosmological inflation after WMAP 1.0 AB - The observational constraints on the primordial power spectrum have tightened considerably with the release of the first-year analysis of the WMAP observations, especially when combined with the results from other CMB experiments and galaxy red-shift surveys. These observations allow us to constrain the physics of cosmological inflation: (i) The data show that the Hubble distance is almost constant during inflation. While observable modes cross the Hubble scale, it changes by less than 3% during one e-folding:. (d) over dot (H) < 0.032 at 2σ. The distance scale of inflation itself remains poorly constrained: 1.2 x 10(-28) cm < d(H) < 1 cm. (ii) We present a new classification of single-field inflationary scenarios ( including scenarios beyond slow-roll inflation), based on physical criteria, namely the behaviour of the kinetic and total energy densities of the inflaton field. The current data show no preference for any of the scenarios. (iii) For the first time the slow-roll assumption could be dropped from the data analysis and replaced by the more general assumption that the Hubble scale is ( almost) constant during the observable part of inflation. We present simple analytic expressions for the scalar and tensor power spectra for this very general class of inflation models and test their accuracy MH - Mexico|Distrito Federal MH - Switzerland PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 1475-7516 UR - ISI:000223638500015 L2 - CMBR theory;inflation;POWER-LAW INFLATION; QUANTUM CORRECTIONS; REDSHIFT SURVEY; ANISOTROPY; SPECTRUM; UNIVERSE; PERTURBATIONS; POLARIZATION; ARCHEOPS; MODELS SO - Journal of Cosmology and Astroparticle Physics 2004 ;(8): 12426 UI - 4749 AU - Schwarz UT AU - Bandres MA AU - Gutierrez-Vega JC AD - Univ Regensburg, Nat Wissensch Fak Phys 2, D-93040 Regensburg, GermanyTecnol Monterrey, Photon & Math Opt Grp, Monterrey 64849, MexicoGutierrez-Vega, JC, Univ Regensburg, Nat Wissensch Fak Phys 2, Univ Str 31, D-93040 Regensburg, Germany TI - Observation of Ince-Gaussian modes in stable resonators AB - We report what is to our knowledge the first observation of Ince-Gaussian modes directly generated in a stable resonator. By slightly breaking the symmetry of the cavity of a diode-pumped Nd:YVO4 laser and its pump beam configuration we were able to generate single high-order Ince-Gaussian modes of high quality. The observed transverse modes have an inherent elliptic structure and exhibit remarkable agreement with theoretical predictions. (C) 2004 Optical Society of America MH - Germany MH - Mexico|Nuevo Leon PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 16 U4 - Optics U5 - J;Article AV - English IS - 0146-9592 UR - ISI:000223074600012 SO - Optics Letters 2004 ;29(16):1870-1872 12427 UI - 3600 AU - Scott-Morales L AU - Estrada E AU - Chavez-Ramirez F AU - Cotera M AD - UANL, Fac Ciencias Forestales, Linares 67700, Nuevo Leon, MexicoInt Crane Fdn, Wood River, NE 68883, USAPlatte River Whooping Crane Trust, Wood River, NE 68883, USAScott-Morales, L, UANL, Fac Ciencias Forestales, Carr A Cd Victoria,Km 145, Linares 67700, Nuevo Leon, Mexico TI - Continued decline in geographic distribution of the Mexican prairie dog (Cynomys mexicanus) AB - We assessed the geographic distribution of the Mexican prairie dog (Cynomys mexicanus) by comparing historical reports, data from a 1996 study, and our distribution estimations from 1999. We located 54 active and 22 inactive prairie dog colonies, determined size for each one, and evaluated whether colony size and isolation had an impact on the persistence of colonies and likelihood for recovery. We estimated a current total distribution of 322 km(2) within the Mexican states of Nuevo Leon (234 km(2)), Coahuila (82 km(2)), and San Luis Potosi (6 km(2)). The occupied range of the Mexican prairie dog suffered a 33% reduction from 1996 to 1999 and an overall reduction of 74% when compared with its documented historical range. We found no relationship between isolation and colony size for active colonies, although geographic isolation can result in decreases in the chances of colonies surviving stochastic events. Other challenges for the recovery of this species include the increased rate of habitat loss and deterioration, and landscape desertification factors MH - Mexico|Nuevo Leon MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000225950800007 L2 - conservation;Cynomys mexicanus;distribution;fragmentation;Mexican Plateau;Mexican prairie dog;recovery;LUDOVICIANUS SO - Journal of Mammalogy 2004 ;85(6):1095-1101 12428 UI - 5955 AU - Scott RL AU - Edwards EA AU - Shuttleworth WJ AU - Huxman TE AU - Watts C AU - Goodrich DC AD - USDA, ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USAUniv Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721, USAUniv Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721, USAInst Medio Ambiente & Desarrollo Sustentable, Hermosillo, Sonora, MexicoScott, RL, USDA, ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USA TI - Interannual and seasonal variation in fluxes of water and carbon dioxide from a riparian woodland ecosystem AB - Fluxes of water, energy and carbon dioxide (CO2) were measured using the eddy covariance technique over a mesquite (Prosopis velutina) woodland along the San Pedro River in southeastern Arizona for the entire growing seasons of 2001 and 2002, between the last freeze event of spring and the first of fall. Although the general pattern of ecosystem response to climate forcing was similar in both years, latent heat and CO2 fluxes showed significant variations between and within the growing seasons. The main differences between the two years were a consequence of an extended drought that lasted from October 2001 to July 2002. Most of the within season variability was attributable to the timing and magnitude of mid-summer precipitation associated with the North American Monsoon. Following new tree leaf production and prior to the monsoon onset, there was little precipitation; daytime air temperatures were high and relative humidity low. Evapotranspiration and water level data indicated that the mesquite trees always had ready access to groundwater, though they were likely supplementing this with vadose zone soil water when abundant. Nonetheless, decreases in afternoon transpiration and CO2 uptake suggest stomatal regulation of leaf gas exchange, possibly in response to the high vapor pressure deficit. Because near-surface soil moisture was limited prior to the summer rains, ecosystem respiration was low and there was little evapotranspiration from understory plants and soil. With the arrival of the monsoon rains, understory vegetation activity and, consequently, total ecosystem evapotranspiration increased. Total ecosystem photosynthesis also increased, but the net uptake of carbon decreased, due to enhanced respiration from the abundant carbon sources, stimulated by the precipitation and warm temperatures. The nighttime measurements of CO2 fluxes, although of questionable accuracy, imply the ecosystem was a net sink of CO2 for most of the two growing seasons. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Sonora MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 32 U4 - Agronomy;Forestry;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0168-1923 UR - ISI:000220321100004 L2 - evapotranspiration;carbon dioxide exchange;eddy covariance;energy balance;riparian vegetation;mesquite;Prosopis velutina;EDDY-COVARIANCE MEASUREMENTS; ENERGY-BALANCE CLOSURE; SUB-ALPINE FOREST; PARTITIONING OVERSTORY; CHIHUAHUAN DESERT; HIGH-ELEVATION; RAIN-FOREST; SAN-PEDRO; EXCHANGE; VEGETATION SO - Agricultural and Forest Meteorology 2004 ;122(1-2):65-84 12429 UI - 4524 AU - Seabra GM AU - Kaplan IG AU - Zakraewski VG AU - Ortiz JV AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoSeabra, GM, Kansas State Univ, Dept Chem, 111 Willard Hall, Manhattan, KS 66506 USA TI - Electron propagator theory calculations of molecular photoionization cross sections: The first-row hydrides AB - Together with ionization potentials, cross sections provide valuable information for the interpretation of photoelectron spectra. We have developed a, program to perform ab initio calculations of photoionization cross sections within the electric dipole approximation using electron. propagator theory. Applications to the first-row hydrides CH4, NH3, H2O, and HF, using several approximations for the propagator self-energy and the plane-wave and orthogonalized-plane-wave approximations to represent the photoelectron, as well as comparison to experimental data, are presented. This program is implemented within the quantum chemistry package GAUSSIAN. (C) 2004 American Institute of Physics MH - USA MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000223623800022 L2 - SHELL IONIZATION ENERGIES; QUASI-PARTICLE THEORY; PHOTOELECTRON-SPECTROSCOPY; BINDING ENERGIES; GREENS-FUNCTION; PLANE-WAVE; INTENSITIES; APPROXIMATION; ORBITALS; HYDROGEN SO - Journal of Chemical Physics 2004 ;121(9):4143-4155 12430 UI - 4352 AU - Segovia-Quintero MA AU - Reigh RC AD - Louisiana State Univ, Ctr Agr, Louisiana Agr Expt Stn, Aquaculture Res Stn, Baton Rouge, LA 70820, USASegovia-Quintero, MA, Ctr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Div Oceanol, Km 107 Carretera Tijuana, Ensenada 22860, Baja California, Mexico TI - Coating crystalline methionine with tripalmitin-polyvinyl alcohol slows its absorption in the intestine of Nile tilapia, Oreochromis niloticus AB - Supplemental free amino acids (FAA) can be used to satisfy dietary amino acid requirements when plant products replace fish meal and other animal byproducts in formulated diets. Use of coated FAA in diets could provide benefits by slowing the rate of FAA absorption and perhaps by increasing utilization efficiency. A laboratory feeding trial was conducted to determine the effect of two coatings-tripalmitin-poiyvinyl alcohol (TPA) and cellulose-acetate-phthalate (CA-P)-on absorption of supplemental methionine by Nile tilapia. Forty-five adult fish (mean weight, 185 g) were stocked individually in 5-l aquaria and fed one of three, semipurified diets containing uncoated L-[S-35]methionine (UM) or TPA- or CAP-coated methionine as 50% of the dietary sulfur amino acid requirement. Three fish were taken from each treatment 0.5, 1, 3, 6, and 12 h after force-feeding to measure relative rates of S-35 uptake and the amount of S-35-activity in intestinal tissues, liver, spleen, muscle, and blood plasma. Methionine uptake was highest in the foregut area, but absorption appeared to occur throughout the length of the intestine, including the hindgut. TPA-coated methionine was absorbed more slowly than uncoated methionine and fish fed with TPA-coated methionine had significantly lower levels of S-35-activity in tissues than fish fed with UM. Activity of labeled methionine in tissues of fish fed with CAP-coated methionine usually was not significantly different from S-35-activity in fish fed with UM. The TPA coating appeared to effectively slow the absorption of free methionine in the gut of Nile tilapia, but additional work is needed to determine if TPA-coated methionine is utilized more efficiently than the uncoated amino acid. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000224004300028 L2 - methionine;supplements;isotopes;coatings;tilapia;Oreochromis niloticus;FREE AMINO-ACIDS; SALMO-GAIRDNERII-RICHARDSON; RAINBOW-TROUT; PROTEIN; PLASMA; DIETS; SUPPLEMENTATION; GROWTH; TISSUE; CASEIN SO - Aquaculture 2004 ;238(1-4):355-367 12431 UI - 5429 AU - Seijo JC AU - Perez EP AU - Caddy JF AD - Univ Marista Merida, Merida 97300, Yucatan, MexicoUniv Catolica Norte, Fac Ciencias Mar, Coquimbo, ChileUniv London, TW Huxley Sch Environm Earth Sci & Engn, London WC1E HU, EnglandSeijo, JC, Univ Marista Merida, Periferico Norte Tablaje 13941 Carretera Merida P, Merida 97300, Yucatan, Mexico TI - A simple approach for dealing with dynamics and uncertainty in fisheries with heterogeneous resource and effort distribution AB - Most fisheries models are based on dynamic pool assumptions. For sedentary and sessile species, these assumptions are inadequate, because they are spatially distributed in patches that vary in size, density and age structure. A simple bioeconomic model, negative binomial (NEGBIN), is proposed; this model relaxes the dynamic pool assumption without entering into the complexities of a geographically structured model. NEGBIN assumes a probability density function ( the negative binomial), to describe heterogeneity in the density distribution over the population range. The model incorporates decision theory and different levels of risk aversion in resource management. The uncertainty associated with alternative fishing strategies, given imperfect knowledge about virgin stock biomass, is also included in the analysis. The model is applied to the Mesodesma donacium ( surf clam) fishery in the central northern zone of Chile ( SouthAmerica). Alternative management strategies are evaluated with different levels of risk aversion. In the fisheries literature to date, this approach to evaluating the uncertainty associated with spatial allocation decisions has been rare. It is suggested that this kind of analysis, whether accompanied by quantitative probabilities of alternative states of nature or not, is an alternative way of dealing with risk and uncertainty in spatial allocation decisions MH - Chile MH - United Kingdom MH - Mexico|Yucatan PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Limnology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 1323-1650 UR - ISI:000221588200004 L2 - bioeconomic simulation;decision theory;risk;spatial allocation of effort;spatial heterogeneity;uncertainty;SALMON; MODEL; FLEET SO - Marine and Freshwater Research 2004 ;55(3):249-256 12432 UI - 5223 AU - Sekerzh-Zenkovich S AU - Volkov B AU - Monzon CO AU - Gomez MAO AD - Olimpica SR, Dept Matemat, Guadalajara 44420, Jalisco, MexicoMoscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, RussiaSekerzh-Zenkovich, S, Olimpica SR, Dept Matemat, Blvd M Garcia Barragan & Calz, Guadalajara 44420, Jalisco, Mexico TI - Asymptotic solutions of the problem of steep capillary-gravitational Faraday waves on the interface between fluids AB - We construct asymptotic solutions of the 2D problem on weakly nonlinear capillary-gravitational Faraday waves and the interface between two fluids (of distinct density) subjected to vertical oscillations. The problem is formulated in the Lagrange variables, and the solutions are sought in the form of expansions in powers of the small parameter characterizing the steepness of the waves, and it is assumed that the ratio of the amplitude of the vertical acceleration of the fluids to the acceleration of gravity is of the order of some power of this small parameter. We construct solutions in the domains of parameters of the problem that correspond to both ordinary regimes (in which one can restrict oneself to two terms of the expansion) and critical and near-critical regimes (in which one must consider fourth-order terms). The resonance curves and wave profiles of the waves of maximal steepness are represented, graphically. The results for ordinary regimes are compared with the known asymptotic solutions for free standing waves and with data of laboratory experiments concerning Faraday waves MH - Mexico|Jalisco MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 1061-9208 UR - ISI:000221915800008 L2 - INTERNAL GRAVITY-WAVES; FINITE-AMPLITUDE; EXCITATION SO - Russian Journal of Mathematical Physics 2004 ;11(2):221-233 12433 UI - 6006 AU - Selman MS AU - Thannickal VJ AU - Pardo A AU - Zisman DA AU - Martinez FJ AU - Lynch JP AD - Inst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoUniv Michigan, Med Ctr, Ann Arbor, MI 48109, USAUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA, USASelman, MS, Inst Nacl Enfermedades Resp, Thalpan 4502,Col Secc XVI, Mexico City 14080, DF, Mexico TI - Idiopathic pulmonary fibrosis - Pathogenesis and therapeutic approaches AB - Idiopathic pulmonary fibrosis (IPF), also termed cryptogenic fibrosing alveolitis, is a clinicopathological syndrome characterised by cough, exertional dyspneoa, basilar crackles, a restrictive defect on pulmonary function tests, honeycombing on high-resolution, thin-section computed tomographic scans and the histological diagnosis of usual interstitial pneumonia on lung biopsy. The course is usually indolent but inexorable. Most patients die of progressive respiratory failure within 3-8 years of the onset of symptoms. Current therapies are of unproven benefit. Although the pathogenesis of IPF has not been elucidated, early concepts focused on lung injury leading to a cycle of chronic alveolar inflammation eventuating in fibrosis and destruction of the lung architecture. Anti-inflammatory therapies employing corticosteroids or immunosuppressive or cytotoxic agents have been disappointing. More recent hypotheses acknowledge that sequential alveolar epithelial cell injury is likely to be a key event in the pathogenesis of IPF, but the cardinal event is an aberrant host response to wound healing. In this context, abnormal epithelial-mesenchymal interactions, altered fibroblast phenotypes, exaggerated fibroblast proliferation, and excessive deposition of collagen and extracellular matrix are pivotal to the fibrotic process. Several clinical trials are currently underway or in the planning stages, and include drugs such as interferon-gamma 1b, pirfenidone, acetylcysteine, etanercept (a tumor necrosis factor-alpha antagonist), bosentan (an endothelin-I receptor antagonist) and zileuton (a 5-lypoxygenase inhibitor). Future therapeutic strategies should be focused on alveolar epithelial cells aimed at enhancing re-epithelialisation and on fibroblastic/myofibroblastic foci, which play an essential role in the development of IPF. Stem cell progenitors of the alveolar epithelial cells and genetic and epigenetic therapies are attractive future approaches for this and other fibrotic lung disorders MH - Mexico|Distrito Federal MH - USA PB - AUCKLAND: ADIS INTERNATIONAL LTD RP - NOT IN FILE U3 - TC 56 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Review AV - English IS - 0012-6667 UR - ISI:000220196900005 L2 - TUMOR-NECROSIS-FACTOR; GROWTH-FACTOR-BETA; HUMAN LUNG FIBROBLASTS; USUAL INTERSTITIAL PNEUMONIA; HEPATIC STELLATE CELLS; ALVEOLAR EPITHELIAL-CELLS; PLACEBO-CONTROLLED TRIAL; ANGIOTENSIN-II BLOCKADE; FIBROTIC HUMAN LUNG; FOCAL SEGMENTAL GLOMERULOSCLEROSIS SO - Drugs 2004 ;64(4):405-430 12434 UI - 6746 AU - Sepulveda F AU - Azorin J AU - Rivera T AU - Furetta C AU - Sanipoli C AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, ItalyRivera, T, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apartado Postal 55-534, Mexico City 09340, DF, Mexico TI - Thermoluminescence (TL) characteristics of perovskite-like KMgF3 activated by La ions AB - This paper reports the experimental results concerning the thermoluminescent characteristics of a new preparation of the fluoroperovskite KMgF3:La + PTFE. The main thermoluminescent properties investigated were: the thermoluminescence (TL) response as a function of the absorbed dose, the precision obtainable in the dose measurement, the reproducibility of the TL readings and the threshold dose. The results obtained were then compared to the requirements of the ANSI protocol for thermoluminescent environmental dosimetry, resulting in a very good agreement with the required performances. (C) 2003 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000187020700062 L2 - THERMALLY STIMULATED LUMINESCENCE; CRYSTALS; DEFECTS; CE SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2004 ;213():329-332 12435 UI - 3525 AU - Serjeant S AU - Carraminana A AU - Gonzales-Solares E AU - Heraudeau P AU - Mujica R AU - Perez-Fournon I AU - Sedgwick N AU - Rowan-Robinson M AU - Franceschini A AU - Babbedge T AU - del Burgo C AU - Ciliegi P AU - Efstathiou A AU - La Franca F AU - Gruppioni C AU - Hughes D AU - Lari C AU - Oliver S AU - Pozzi F AU - Stickel M AU - Vaccari M AD - Univ Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NR, Kent, EnglandInst Nacl Astrofis Opt & Electr, Puebla 72840, MexicoUniv Sussex, CPES, Ctr Astron, Brighton BN1 9QJ, E Sussex, EnglandKapteyn Astron Inst, NL-9700 AV Groningen, NetherlandsMax Planck Inst Astron, D-69117 Heidelberg, GermanyInst Astrofis Canarias, Tenerife 38200, SpainUniv London Imperial Coll Sci & Technol, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandBologna Astron Observ, I-40127 Bologna, ItalyUniv Padua, Dipartimento Astron, I-35122 Padua, ItalyUniv Roma TRE, Dipartimento Fis, I-00146 Rome, ItalyIst Radioastron, I-40129 Bologna, ItalyCyprus Coll, CY-1516 Nicosia, CyprusEstec, NL-2201 AZ Noordwijk, NetherlandsUniv Cambridge, Inst Astron, Cambridge CB3 0HA, EnglandSerjeant, S, Univ Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NR, Kent, England TI - The European Large Area ISO Survey - IX. The 90-mu m luminosity function from the Final Analysis sample AB - We present the 90-mum luminosity function of the Final Analysis of the European Large Area ISO Survey (ELAIS), extending the sample size of our previous analysis (Paper IV) by about a factor of 4. Our sample extends to z = 1.1, similar to50 times the comoving volume of Paper IV, and 10(7.7) < h(-2) L/Lcircle dot < 10(12.5). From our optical spectroscopy campaigns of the northern ELAIS 90-mum survey (7.4 deg(2) in total, to S-90 (mum) > 70 mJy), we obtained redshifts for 61 per cent of the sample (151 redshifts) to B < 21 identified at 7 mum, 15 mum, 20 cm or with bright (B < 18.5) optical identifications. The selection function is well-defined, permitting the construction of the 90-mum luminosity function of the Final Analysis catalogue in the ELAIS northern fields, which is in excellent agreement with our Preliminary Analysis luminosity function in the ELAIS S 1 field from Paper IV. The luminosity function is also in good agreement with the recent IRAS-based prediction of Serjeant and Harrison - which, if correct, requires luminosity evolution of (1 + z)(3.4 +/- 1.0) for consistency with the source counts. This implies an evolution in comoving-volume-averaged star formation rate at z less than or similar to 1 consistent with that derived from rest-frame optical and ultraviolet surveys MH - Cyprus MH - United Kingdom MH - Germany MH - Italy MH - Mexico|Puebla MH - Netherlands MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000226116200016 L2 - galaxies : evolution;galaxies : formation;galaxies : starburst;cosmology : observations;infrared : galaxies;submillimetre;STAR-FORMATION HISTORY; EXTRAGALACTIC SOURCE COUNTS; FAINT RADIO-SOURCES; HUBBLE DEEP FIELD; X-RAY SURVEY; DATA REDUCTION; SCUBA-8-MJY SURVEY; GALAXY EVOLUTION; SOUTHERN FIELD; ELAIS SO - Monthly Notices of the Royal Astronomical Society 2004 ;355(3):813-818 12436 UI - 5405 AU - Serkin VN AU - Hasegawa A AU - Belyaeva TL AD - Benemarita Univ Autonoma Puebla, Puebla 72001, MexicoSoliton Commun, Higashiyama Ku, Kyoto 6050035, JapanSerkin, VN, Benemarita Univ Autonoma Puebla, AP 502, Puebla 72001, Mexico TI - Comment on "Exact self-similar solutions of the generalized nonlinear Schrodinger equation with distributed coefficients'' MH - Japan MH - Mexico|Puebla PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Editorial Material AV - English IS - 0031-9007 UR - ISI:000221540900073 L2 - VARYING DISPERSION; WAVES; EVOLUTION; MODEL; GAIN SO - Physical Review Letters 2004 ;92(19): 12437 UI - 4686 AU - Serrano-Pinto V AU - Landais I AU - Ogliastro MH AU - Gutierrez-Ayala M AU - Mejia-Ruiz H AD - CIBNOR, Ctr Invest Biol NE, SC Programa Acuacultura, La Paz 23000, Baja Calif Sur, MexicoUniv Montpellier 2, CNRS, INRA, Lab Pathol Comparee, St Christol Les Ales, FranceSerrano-Pinto, V, CIBNOR, Ctr Invest Biol NE, SC Programa Acuacultura, POB 128, La Paz 23000, Baja Calif Sur, Mexico TI - Vitellogenin mRNA expression in Cherax quadricarinatus during secondary vitellogenic at first maturation females AB - PCR products of 1.1 and 0.9 kb were generated using Cherax quadricarinatus genomic DNA in the first case, and helpatopancreas and ovary cDNAs in the second case. These PCR products were cloned and analyzed for nucleotide sequences. The 1.1 kb fragment was used as a probe for Northern hybridization, revealing a transcript of approximately 8 kb in both tissues. Results from both Northern blot and RT-PCR analyses showed that the mRNA enconding the 3' end of the vitellogenin cDNA was present simultaneously in both hepatopancreas and ovary tissues in secondary vitellogenic at first maturation females, but was not detected in male hepatopancreas. The deduced amino acid sequences of Vitellogenin (Vg) cDNAs from ovary and hepatopancreas confirmed the existence at least two different Vg genes, and two different sites of synthesis. (C) 2004 Wiley-Liss, Inc MH - France MH - Mexico|Baja California Sur PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Cell Biology;Developmental Biology;Reproductive Biology U5 - J;Article AV - English IS - 1040-452X UR - ISI:000223162400003 L2 - Cherax quadricarinatus;crayfish;mRNA expression;vitellogenin;FRESH-WATER PRAWN; MACROBRACHIUM-ROSENBERGII; REPRODUCTIVE-CYCLE; OVARIAN MATURATION; PENAEUS-JAPONICUS; PROTEIN-SYNTHESIS; KURUMA PRAWN; SITE; HEPATOPANCREAS; VITELLIN SO - Molecular Reproduction and Development 2004 ;69(1):17-21 12438 UI - 5626 AU - Serrano-Trespalacios PI AU - Ryan L AU - Spengler JD AD - Harvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02115, USASerrano-Trespalacios, PI, Fuente Quijote 12,Col Tacamachalco, Mexico City 53950, DF, Mexico TI - Ambient, indoor and personal exposure relationships of volatile organic compounds in Mexico City Metropolitan Area AB - Air pollution standards and control strategies are based on ambient measurements. For many outdoor air pollutants, individuals are closer to their sources (especially traffic) and there are important indoor sources influencing the relationship between ambient and personal exposures. This paper examines the relationship between volatile organic compounds (VOCs) measured at central site monitoring stations and personal exposures in the Mexico City Metropolitan Area. Over a 1-year period, personal exposures to 34 VOCs were measured for 90 volunteers from 30 families living close to one of five central monitoring stations. Simultaneous 24-h indoor, outdoor and central site measurements were also taken. Dual packed thermal desorption tubes and C-18 DNPH-coated cartridges were used for sampling VOCs and these were analyzed by GC/MS and HPLC, respectively. A factor analysis of the personal exposure data aided in grouping compounds by the most likely source type: vehicular (BTEX, styrene and 1,3-butadiene), secondary formed or photochemical (most aldehydes), building materials and consumer products (formaldehyde and benzaldehyde), cleaning solvents (tetrachloroethene and 1,1,1-trichloroethane), volatilization from water (chloroform and trichloroethene) and deodorizers (1,4-dichlorobenzene). Mean ambient, indoor and personal concentrations were 7/7/14 mug/m(3) for benzene, 1/3/3 for 1,3-butadiene, 6/20/20 for formaldehyde and 3/9/50 for 1,4-dichlorobenzene. Geometric mean (GM) ambient concentrations of trichloroethene and carbon tetrachloride were similar to GM personal exposures. While outdoor and indoor home GM concentrations for most vehicular related compounds (benzene, MTBE, xylenes and styrene) were comparable, the GM personal exposures were twice as high. Indoor concentrations of 1,3-butadiene, 1,1,1-trichloroethane, tetrachloroethane, chloroform, formaldehyde, valeraldehyde, propionaldehyde and n-butyraldehyde were comparable to personal exposures. For certain compounds, such as chloroform, aldehydes, toluene, 1,3-butadiene and 1,4-dichlorobenzene, GM personal exposures were more than two times greater than GM ambient measurements MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 8 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Toxicology U5 - J;Article AV - English IS - 1053-4245 UR - ISI:000221128900015 L2 - VOC;aldehydes;1,3-butadiene;factor analysis;personal exposure;indoor concentrations;ASSESSMENT METHODOLOGY TEAM; ASSESSMENT SURVEY NHEXAS; CONSUMER PRODUCTS; AROMATIC-HYDROCARBONS; OUTDOOR RELATIONSHIPS; SOURCE APPORTIONMENT; BUILDING-MATERIALS; C-18 CARTRIDGES; EMISSION RATES; BREATH LEVELS SO - Journal of Exposure Analysis and Environmental Epidemiology 2004 ;14():S118-S132 12439 UI - 4389 AU - Serrano J AU - Velazquez G AU - Lopetcharat K AU - Ramirez JA AU - Torres JA AD - Oregon State Univ, Dept Food Sci & Technol, Food Proc Engn Grp, Corvallis, OR 97331, USAUniv Autonoma Queretaro, Ctr Univ, Fac Quim, Dpto Invest & Posgrado Alimentos, Queretaro 76010, MexicoUniv Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tam, MexicoUnilever Res US, Edgewater, NJ 07020, USATorres, JA, Oregon State Univ, Dept Food Sci & Technol, Food Proc Engn Grp, 100 Wiegand Hall, Corvallis, OR 97331 USA TI - Effect of moderate pressure treatments on microstructure, texture, and sensory properties of stirred-curd Cheddar shreds AB - A moderate high-pressure processing (HPP) treatment is proposed to accelerate the shredability of Cheddar cheese. High pressure processing (345 and 483 MPa for 3 and 7 min) applied to unripened (1 d old) stirred-curd Cheddar cheese yielded microstructure changes that differed with pressure level and processing time. Untreated and pressure-treated cheese shredded at d 27 and 1, respectively, shared similar visual and tactile sensory properties. The moderate ( 345 MPa) and the higher ( 483 MPa) pressure treatments reduced the presence of crumbles, increased mean shred particle length, improved length uniformity, and enhanced surface smoothness in shreds produced from unripened cheese. High-pressure processing treatments did not affect the mechanical properties of ripened cheese or the proteolytic susceptibility of milk protein. It was concluded that a moderate HPP treatment could allow processors to shred Cheddar cheese immediately after block cooling, reducing refrigerated storage costs, with expected savings of over 15 US$/1000 lb cheese, and allowing fewer steps in the handling of cheese blocks produced for shredding MH - Mexico|Queretaro MH - Mexico|Tamaulipas MH - USA PB - SAVOY: AMER DAIRY SCIENCE ASSOC RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Dairy & Animal Science;Food Science & Technology U5 - J;Article AV - English IS - 0022-0302 UR - ISI:000224011800007 L2 - Cheddar cheese;high-pressure processing;microstructure;shredability;TREATED GOUDA CHEESE; GOATS MILK CHEESE; PROTEOLYSIS SO - Journal of Dairy Science 2004 ;87(10):3172-3182 12440 UI - 5760 AU - Serrano J AU - Romero AH AU - Manjon FJ AU - Lauck R AU - Cardona M AU - Rubio A AD - Max Planck Inst Festkorperforsch, D-70569 Stuttgart, GermanyIPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoUniv Politecn Valencia, Dept Fis Aplicada, EPSA, ES-03801 Alcoy, SpainUniv Pais Vasco, Fac Ciencias Quim, Dept Fis Mat, Ctr Mixto CSIC UPV EHU, E-20018 San Sebastian, Basque Country, SpainDonostia Int Phys Ctr, E-20018 San Sebastian, Basque Country, SpainCardona, M, Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany TI - Pressure dependence of the lattice dynamics of ZnO: An ab initio approach AB - We have performed first-principles calculations of the electronic structure of ZnO, and applied them to the determination of structural and lattice-dynamical properties and their dependence on pressure. The dynamical matrices have been obtained for the wurtzite, zinc-blende, and rocksalt modifications with several lattice parameters optimized for pressures up to 12 GPa. These matrices are employed to calculate the one-phonon densities of states (DOS) and the two-phonon DOS associated with either sums or differences of phonons. These results provide the essential tools to analyze the effect of isotope-induced mass disorder and anharmonicity on phonon linewidths, which we discuss here and compare with experimental data from Raman spectroscopy, including first- and second-order spectra. Agreement of calculated properties with experimental results improves considerably when the renormalization due to anharmonicity is subtracted from the experimental data MH - Germany MH - Mexico|San Luis Potosi MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 44 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000220812800062 L2 - FUNCTIONAL PERTURBATION-THEORY; PARTICLE ENERGY CALCULATIONS; II-VI-COMPOUNDS; OPTICAL-PROPERTIES; ZINC-OXIDE; SPONTANEOUS POLARIZATION; ELECTRONIC-STRUCTURE; NEUTRON-SCATTERING; WURTZITE-STRUCTURE; PHONON-DISPERSION SO - Physical Review B 2004 ;69(9): 12441 UI - 6136 AU - Servin M AU - Marroquin JL AU - Quiroga JA AD - Ctr Invest Opt AC, Leon 37150, Guanajuato, MexicoCtr Invest Matemat AC, Guanajuato 36000, MexicoUniv Complutense Madrid, Dept Opt, Madrid 2841, SpainServin, M, Ctr Invest Opt AC, Apartado Postal 1-948, Leon 37150, Guanajuato, Mexico TI - Regularized quadrature and phase tracking from a single closed-fringe interferogram AB - A new sequential phase demodulator based on a regularized quadrature and phase tracker system (RAPT) is applied to demodulate two-dimensional fringe patterns. This RQPT system tracks the fringe pattern's quadrature and phase in a sequential way by following the path of the fringes. To make the RAPT system more robust to noise, the modulating phase around a small neighborhood is modeled as a plane and the quadrature of the signal is estimated simultaneously with the fringe's modulating phase. By sequentially calculating the quadrature of the fringe pattern, one obtains a more robust sequential demodulator than was previously possible. This system may be applied to the demodulation of a single interferogram having closed fringes. (C) 2004 Optical Society of America MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Optics U5 - J;Article AV - English IS - 1084-7529 UR - ISI:000189157800011 L2 - PATTERN-ANALYSIS; DEMODULATION; TRANSFORM SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2004 ;21(3):411-419 12442 UI - 5561 AU - Setlow B AU - Cabrera-Martinez RM AU - Setlow P AD - Univ Connecticut, Ctr Hlth, Dept Mol Microbial & Struct Biol, Farmington, CT 06032, USAInst Politecn Nacl, Escuela Nacl Ciencas Biol, Dept Bioquim, Mexico City 11340, DF, MexicoSetlow, B, Univ Connecticut, Ctr Hlth, Dept Mol Microbial & Struct Biol, Farmington, CT 06032 USA TI - Mechanism of the hydrolysis of 4-methylumbelliferyl-beta-D-glucoside by germinating and outgrowing spores of Bacillus species AB - Aims: To determine the mechanism of the hydrolysis of 4-methylumbelliferyl-beta-D-glucopyranoside (beta-MUG) by germinating and outgrowing spores of Bacillus species. Methods and Results: Spores of B. atrophaeus (formerly B. subtilis var. niger, Fritze and Pukall 2001) are used as biological indicators of the efficacy of ethylene oxide sterilization by measurement of beta-MUG hydrolysis during spore germination and outgrowth. It was previously shown that beta-MUG is hydrolysed to 4-methylumbelliferone (MU) during the germination and outgrowth of B. atrophaeus spores (Chandrapati and Woodson 2003), and this was also the case with spores of B. subtilis 168. Germination of spores of either B. atrophaeus or B. subtilis with chloramphenicol reduced beta-MUG hydrolysis by almost 99%, indicating that proteins needed for rapid beta-MUG hydrolysis are synthesized during spore outgrowth. However, the residual beta-MUG hydrolysis during spore germination with chloramphenicol indicated that dormant spores contain low levels of proteins needed for beta-MUG uptake and hydrolysis. With B. subtilis 168 spores that lacked several general proteins of the phosphotransferase system (PTS) for sugar uptake, beta-MUG hydrolysis during spore germination and outgrowth was decreased >99.9%. This indicated that beta-MUG is taken up by the PTS, resulting in the intracellular accumulation of the phosphorylated form of beta-MUG, beta-MUG-6-phosphate (beta-MUG-P). This was further demonstrated by the lack of detectable glucosidase activity on beta-MUG in dormant, germinated and outgrowing spore extracts, while phosphoglucosidase active on beta-MUG-P was readily detected. Dormant B. subtilis 168 spores had low levels of at least four phosphoglucosidases active on beta-MUG-P: BglA, BglH, BglC (originally called YckE) and BglD (originally called YdhP). These enzymes were also detected in spores germinating and outgrowing with beta-MUG, but levels of BglH were the highest, as this enzyme's synthesis was induced ca 100-fold during spore outgrowth in the presence of beta-MUG. Deletion of the genes coding for BglA, BglH, BglC and BglD reduced beta-MUG hydrolysis by germinating and outgrowing spores of B. subtilis 168 at least 99.7%. Assay of glucosidases active on beta-MUG or beta-MUG-P in extracts of dormant and outgrowing spores of B. atrophaeus revealed no enzyme active on beta-MUG and one enzyme that comprised greater than or equal to90% of the phosphoglucosidase active on beta-MUG-P. Partial purification and amino-terminal sequence analysis of this phosphoglucosidase identified this enzyme as BglH. Conclusions: Generation of MU from beta-MUG by germinating and outgrowing spores of B. atrophaeus and B. subtilis is mediated by the PTS-driven uptake and phosphorylation of beta-MUG, followed by phosphoglucosidase action on the intracellular beta-MUG-P. The major phosphoglucosidase catalyzing MU generation from beta-MUG-P in spores of both species is probably BglH. Significance and Impact of the Study: This work provides new insight into the mechanism of uptake and hydrolysis of beta-MUG by germinating and outgrowing spores of Bacillus species, in particular B. atrophaeus. The research reported here provides a biological basis for a Rapid Readout Biological Indicator that is used to monitor the efficacy of ethylene oxide sterilization MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 1364-5072 UR - ISI:000221299700006 L2 - aryl-phospho-beta-D-glucosidase;Bacillus subtilis;phosphotransferase system;spore germination;spore viability assays;READOUT BIOLOGICAL INDICATOR; BETA-GLUCOSIDE UTILIZATION; STEAM STERILIZATION; ESCHERICHIA-COLI; SUBTILIS SPORES; PROTEINS; ACID; GENE; STEAROTHERMOPHILUS; RESISTANCE SO - Journal of Applied Microbiology 2004 ;96(6):1245-1255 12443 UI - 6470 AU - Setlow B AU - Cabrera-Hernandez A AU - Cabrera-Martinez RM AU - Setlow P AD - Univ Connecticut, Ctr Hlth, Dept Mol Microbial & Struct Biol, Farmington, CT 06032, USAEscuela Nacl Ciencias Biol, Inst Politecn Nacl, Dept Bioquim, Mexico City 11340, DF, MexicoSetlow, P, Univ Connecticut, Ctr Hlth, Dept Mol Microbial & Struct Biol, Farmington, CT 06032 USA TI - Identification of aryl-phospho-beta-D-glucosidases in Bacillus subtilis AB - Four aryl-phospho-beta-D-glucosidases were identified in Bacillus subtilis by using 4-methylumbelliferyl-phospho-beta-D-glucopyranoside as a substrate. Two of these enzymes are the products of the bglA and bglH genes, previously suggested to encode aryl-phospho-beta-D-glucosidases, while the other enzymes are encoded by the yckE and ydhP genes. Together, these four genes account for >99.9% of the glucosidase activity in B. subtilis on aryl-phospho-beta-D-glucosides. yckE was expressed at a low and constant level during growth, sporulation, and spore germination, and was not induced by aryl-beta-D-glucosides. ydhP was also not induced by aryl-beta-D-glucosides. However, while ydhP was expressed at only a very low level in exponential-phase cells and germinating spores, this gene was expressed at a higher levels upon entry into the stationary phase of growth. Strains lacking yckE or ydhP exhibited no defects in growth, sporulation, or spore germination or in growth on aryl-beta-D-glucosides. However, a strain lacking bglA, bglH and yckE grew poorly if at all on aryl-beta-D-glucosides as the sole carbon source MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0302-8933 UR - ISI:000188113000008 L2 - Bacillus subtilis;bglA;bglH;yckE;ydhP;phosphoglucosidase;arylglucosides;ESCHERICHIA-COLI; GENE; EXPRESSION; PROTEINS; ENCODES; SYSTEM; SPORES; ACID SO - Archives of Microbiology 2004 ;181(1):60-67 12444 UI - 6482 AU - setti-Romero V AU - Izrailev FM AU - Krokhin AA AD - Univ Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv N Texas, Dept Phys, Denton, TX 76203, USAIzrailev, FM, Univ Autonoma Puebla, Inst Fis, Apdo Postal J-48, Puebla 72570, Mexico TI - Resistance of a 1D random chain: Hamiltonian version of the transfer matrix approach AB - We study some mesoscopic properties of electron transport by employing one-dimensional chains and Anderson tight-binding model. Principal attention is paid to the resistance of finite-length chains with disordered white-noise potential. We develop a new version of the transfer matrix approach based on the equivalency of a discrete Schrodinger equation and a two-dimensional Hamiltonian map describing a parametric kicked oscillator. In the two limiting cases of ballistic and localized regime we demonstrate how analytical results for the mean resistance and its second moment can be derived directly from the averaging over classical trajectories of the Hamiltonian map. We also discuss the implication of the single parameter scaling hypothesis to the resistance. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000188086800005 L2 - Anderson model;mesoscopic fluctuations;resistance;single-parameter scaling;DIMENSIONAL ANDERSON MODEL; RANDOM-DIMER MODEL; CORRELATED DISORDER; SCALING THEORY; MOBILITY EDGE; LOCALIZATION; STATES; POTENTIALS; ABSENCE; DELOCALIZATION SO - Physics Letters A 2004 ;320(4):276-285 12445 UI - 4410 AU - Sewilo M AU - Watson C AU - Araya E AU - Churchwell E AU - Hofner P AU - Kurtz S AD - Univ Wisconsin, Dept Astron, Madison, WI 53706, USANew Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USANatl Radio Astron Observ, Socorro, NM 87801, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoSewilo, M, Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA TI - Resolution of distance ambiguities of inner galaxy massive star formation regions. II AB - We report simultaneous H110alpha and H2CO line observations with the NRAO Green Bank Telescope toward 72 H II regions in the Spitzer Space Telescope GLIMPSE survey area (\iota\ = 10degrees-65degrees and \b\ less than or equal to 1degrees). We used the H110alpha line to establish the velocity of the H II regions and H2CO absorption lines to distinguish between near and far distances. Accurate distances are crucial for the determination of physical properties of massive star formation regions. We resolved the distance ambiguity of 44 H II regions. We detected multiple H II regions along 18 lines of sight located in the longitude interval 12degrees-31degrees, primarily a result of the relatively large telescope beam width. We could not resolve distance ambiguities for lines of sight with multiple H II regions, since we could not determine which H2CO lines were being absorbed against which H II region. We examined the projected location of H II regions whose distance ambiguities have been resolved (in this work and other similar studies) in the Galactic plane and in a longitude-velocity diagram for a recognizable spiral arm pattern. Although the highest density of points in the position-position plot approximately follows the spiral arms proposed by Taylor & Cordes, the dispersion is still about as large as the separation between their proposed arms. The longitude-velocity plot shows an increase in the density of sources at the points where the spiral arm loci proposed by Taylor & Cordes are approaching the locus of tangent point velocities and a lower density between the arm loci. However, it is not possible to trace spiral arms over significant segments of Galactic longitude in the longitude-velocity plot. We conclude that a very large number of H II regions in combination with more sophisticated Galactic rotation models will be required to obtain a more continuous spiral pattern from kinematic studies of H II regions than from fully sampled surveys of H I or CO MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000224065000007 L2 - galaxy : disk HII regions;ISM : molecules;radio lines : ISM;stars : formation;ULTRACOMPACT HII-REGIONS; ROTATION CURVE; ABSORPTION SO - Astrophysical Journal Supplement Series 2004 ;154(2):553-578 12446 UI - 5792 AU - Sewilo M AU - Churchwell E AU - Kurtz S AU - Goss WM AU - Hofner P AD - Univ Wisconsin, Dept Astron, Madison, WI 53706, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoNatl Radio Astron Observ, Socorro, NM 87801, USANew Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USASewilo, M, Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA TI - Broad radio recombination lines from hypercompact HII regions AB - The H92alpha recombination line was observed toward six massive star formation regions (MSFRs), and the H76alpha line was observed toward one MSFR. All seven MSFRs were suspected of harboring hypercompact (HC) H II regions. The goal was to detect broad-line sources and to investigate their properties. The sources were selected according to their small sizes, high brightness temperatures, and rising continuum spectra ( typical spectral index alphasimilar to+1, S(nu)proportional tonu(alpha)) at centimeter wavelengths. Two of the HC H II candidates, G25.5+0.2 and NGC 7538 (IRS 1), were previously known to have extremely broad lines ( line widths of 160 and 180 km s(-1), respectively). Sixteen separate, compact, radio continuum components were detected, fourteen of which were detected in either the H92alpha or H76alpha line. Eight sources have line widths (FWHMs) greater than 40 km s(-1); typical ultracompact (UC) H II region line widths are 25 - 30 km s(-1). These broad lines may be produced by a combination of thermal, turbulent, and electron impact broadening, and large-scale motions ( rotation, expansion, jets, shocks, inflow, disk, etc.). On the basis of one line and a relatively low spatial resolution, we are unable to determine the relative contributions from each mechanism. All the MSFRs in the current sample are composed of two or more continuum components. The large projected separations between the continuum components within a given MSFR indicate that they are unlikely to be gravitationally bound massive protostars. Possible origins of the observed intermediate-sloped power-law spectral energy distributions (SEDs) are discussed. It is suggested that hierarchal clumping in HC H II regions may produce the observed power-law SEDs MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000220801700025 L2 - HII regions;radio lines : ISM;stars : formation;H-II REGIONS; STAR-FORMING REGION; METHANOL MASER SURVEY; HIGH-RESOLUTION; MASSIVE STARS; VLA OBSERVATIONS; PHYSICAL-PROPERTIES; MOLECULAR OUTFLOWS; NGC-7538 IRS-1; AU SCALES SO - Astrophysical Journal 2004 ;605(1):285-299 12447 UI - 4805 AU - Shah BH AU - Yesilkaya A AU - Olivares-Reyes JA AU - Chen HD AU - Hunyady L AU - Catt KJ AD - NICHHD, Endocrinol & Reprod Res Branch, NIH, Bethesda, MD 20892, USAAkdeniz Univ, Tip Fak, TR-07070 Antalya, TurkeyInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoSemmelweis Univ, Fac Med, Dept Physiol, H-1444 Budapest, HungaryCatt, KJ, NICHHD, Endocrinol & Reprod Res Branch, NIH, Bldg 49,Room 6A36, Bethesda, MD 20892 USA TI - Differential pathways of angiotensin II-induced extracellularly regulated kinase 1/2 phosphorylation in specific cell types: Role of heparin-binding epidermal growth factor AB - Stimulation of the angiotensin II (Ang II) type 1 receptor (AT(1)-R) causes phosphorylation of extra-cellularly regulated kinases 1 and 2 (ERK1/2) via epidermal growth factor receptor (EGF-R) transactivation-dependent or -independent pathways in Ang II target cells. Here we examined the mechanisms involved in agonist-induced EGF-R transactivation and subsequent ERK1/2 phosphorylation in clone 9 (C9) hepatocytes, which express endogenous AT(1)-R, and COS-7 and human embryonic kidney (HEK) 293 cells transfected with the AT(1)-R. Ang II-induced ERK1/2 activation was attenuated by inhibition of Src kinase and of matrix metalloproteinases (MMPs) in C9 and COS-7 cells, but not in HEK 293 cells. Agonist-mediated MMP activation in C9 cells led to shedding of heparin-binding EGF (HB-EGF) and stimulation of ERK1/2 phosphorylation. Blockade of HB-EGF action by neutralizing antibody or its selective inhibitor, CRM197, attenuated ERK1/2 activation by Ang II. Consistent with its agonist action, HB-EGF stimulation of these cells caused marked phosphorylation of the EGF-R and its adapter molecule, Shc, as well as ERK1/2 and its dependent protein, p90 ribosomal S6 kinase, in a manner similar to that elicited by Ang II or EGF. Although the Tyr319 residue of the AT(1)-R has been proposed to be an essential regulator of EGF-R transactivation, stimulation of wild-type and mutant (Y319F) AT(1)-R expressed in COS-7 cells caused EGF-R transactivation and subsequent ERK1/2 phosphorylation through release of HB-EGF in a Src-dependent manner. In contrast, the noninvolvement of MMPs in HEK 293 cells, which may reflect the absence of Src activation by Ang II, was associated with lack of transactivation of the EGF-R. These data demonstrate that the individual actions of Ang II on EGF-R transactivation in specific cell types are related to differential involvement of MMP-dependent HB-EGF release MH - Hungary MH - USA MH - Mexico|Distrito Federal MH - Turkey PB - CHEVY CHASE: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 26 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0888-8809 UR - ISI:000222907600014 L2 - FACTOR RECEPTOR TRANSACTIVATION; PROTEIN-COUPLED RECEPTORS; SMOOTH-MUSCLE-CELLS; INDUCED CARDIAC-HYPERTROPHY; FACTOR (EGF)-LIKE DOMAIN; HB-EGF; TYROSINE KINASES; MESANGIAL CELLS; ERK ACTIVATION; INTERNALIZATION SO - Molecular Endocrinology 2004 ;18(8):2035-2048 12448 UI - 3536 AU - Shaheen HI AU - Khalil SB AU - Rao MR AU - bu Elyazeed R AU - Wierzba TF AU - Peruski LF AU - Putnam S AU - Navarro A AU - Morsy BZ AU - Cravioto A AU - Clemens JD AU - Svennerholm AM AU - Savarino SJ AD - USN, Med Res Ctr, Silver Spring, MD 20910, USAUSN, Med Res Unit 3, Cairo, EgyptEgyptian Minist Hlth & Populat, Abu Homos, Beheira Governo, EgyptNICHHD, Div Epidemiol Stat & Prevent Res, Bethesda, MD 20892, USANatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoInt Vaccine Inst, Seoul, South KoreaUniv Gothenburg, Dept Med Microbiol & Immunol, Gothenburg, SwedenSavarino, SJ, USN, Med Res Ctr, 503 Robert Grant Ave, Silver Spring, MD 20910 USA TI - Phenotypic profiles of enterotoxigenic Escherichia coli associated with early childhood diarrhea in rural Egypt AB - Enterotoxigenic Escherichia coli (ETEC) causes substantial diarrheal morbidity and mortality in young children in countries with limited resources. We determined the phenotypic profiles of 915 ETEC diarrheal isolates derived from Egyptian children under 3 years of age who participated in a 3-year population-based study. For each strain, we ascertained enterotoxin and colonization factor (CF) expression, the O:H serotype, and antimicrobial susceptibility. Sixty-one percent of the strains expressed heat-stable enterotoxin (ST) only, 26% expressed heat-labile enterotoxin (LT) alone, and 12% expressed both toxins. The most common CF phenotypes were colonization factor antigen I (CFA/I) (10%), coli surface antigen 6 (CS6) (We), CS14 (6%), and CS1 plus CS3 (4%). Fifty-nine percent of the strains did not express any of the 12 CFs included in our test panel. Resistance of ETEC strains to ampicillin (63%), trimethoprim-sulfamethoxazole (52%), and tetracycline (43%) was common, while resistance to quinolone antibiotics was rarely detected. As for the distribution of observed serotypes, there was an unusually wide diversity of 0 antigens and H types represented among the 915 ETEC strains. The most commonly recognized composite ETEC phenotypes were ST CS14 O78:H18 (4%), ST (or LTST) CFA/I O128:H12 (3%), ST CS1+CS3 O6:H16 (2%), and ST CFA/I O153:H45 (1.5%). Temporal plots of diarrheal episodes associated with ETEC strains bearing common composite phenotypes were consistent with discrete community outbreaks either within a single or over successive warm seasons. These data suggest that a proportion of the disease that is endemic to young children in rural Egypt represents the confluence of small epidemics by clonally related ETEC strains that are transiently introduced or that persist in a community reservoir MH - USA MH - Egypt MH - Mexico|Distrito Federal MH - South Korea MH - Sweden PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 9 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000226035800025 L2 - COLONIZATION FACTOR ANTIGENS; YOUNG-CHILDREN; MONOCLONAL-ANTIBODIES; IMMUNOSORBENT-ASSAY; PROSPECTIVE COHORT; ETEC; PREVALENCE; TRAVELERS; INFANTS; DISEASE SO - Journal of Clinical Microbiology 2004 ;42(12):5588-5595 12449 UI - 5054 AU - Shakhmatov D AU - Tkachenko M AU - Wilson RG AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Topol Res Grp, Mexico City 09340, DF, MexicoShakhmatov, D, Ehime Univ, Fac Sci, Dept Math Sci, Matsuyama, Ehime 7908577, Japan TI - Transversal and T-1-independent topologies AB - A pair tau(1), tau(2) of T-1 topologies on an infinite set X is called T-1-independent if their intersection tau(1) boolean AND tau(2) is the cofinite topology, and transversal if the union tau(1) boolean OR tau(2) generates the discrete topology. We show that every Hausdorff space admits a transversal compact Hausdorff topology. Then we apply Booth's Lemma to prove that no infinite set of cardinality less than 2(omega) admits a pair of T-1-independent Hausdorff topologies. This answers, in a strong form, a question posed by S. Watson in 1996. It is shown in ZFC that betaomega\omega is a self T-1-independent compact Hausdorff space, but the existence of self T-1-independent compact Hausdorff spaces of cardinality 2(omega) is both consistent with and independent of ZFC MH - Japan MH - Mexico|Distrito Federal PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000222266300008 L2 - transversal topologies;T-1-independent topologies;compact;countably compact;second countable;self-independent;self-transversal;convergent sequence;sequential;SPACE SO - Houston Journal of Mathematics 2004 ;30(2):421-433 12450 UI - 6558 AU - Shalabi A AU - Zamudio F AU - Wu XY AU - Scaloni A AU - Possani LD AU - Villereal ML AD - Univ Chicago, Dept Neurobiol Pharmacol & Physiol, Chicago, IL 60637, USANatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoCNR, Ist Sistema Prod Anim Ambiente Mediterraneo, Proteom & Mass Spectrometry Lab, I-80147 Naples, ItalyVillereal, ML, Univ Chicago, Dept Neurobiol Pharmacol & Physiol, 947 E 58th St, Chicago, IL 60637 USA TI - Tetrapandins, a new class of scorpion toxins that specifically inhibit store-operated calcium entry in human embryonic kidney-293 cells AB - Venoms from 14 snakes and four scorpions were screened for inhibitory activities toward store-operated Ca2+ entry (SOCE) in human embryonic kidney-293 cells. An inhibitory activity was found in venom from the African scorpion Pandinus imperator. The active agent of this venom was purified by gel filtration and reverse-phase high pressure liquid chromatography methods. Sequence information on the purified fraction, by automatic Edman degradation and mass spectrometry analysis, identified the activity as being contained in two tetrapeptides, which we have named tetrapandins. We demonstrate that synthesized tetrapandins have inhibitory activity for SOCE in human embryonic kidney-293 cells while having no effect on either thapsigarginor carbachol-stimulated release of Ca2+ stores. These toxins should be extremely useful in future studies to determine downstream events regulated by SOCE as well as to determine whether multiple pathways exist for thapsigargin-stimulated Ca2+ entry MH - USA MH - Italy MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000187722800027 L2 - 2-AMINOETHOXYDIPHENYL BORATE 2-APB; CA2+ ENTRY; ENDOTHELIAL-CELLS; HEK-293 CELLS; RECEPTOR; CHANNELS; PATHWAYS; RELEASE; INFLUX; SK-AND-F-96365 SO - Journal of Biological Chemistry 2004 ;279(2):1040-1049 12451 UI - 4552 AU - Shang H AU - Lizano S AU - Glassgold A AU - Shu F AD - Acad Sinica, Inst Astron & Astrophys, Taipei 106, TaiwanUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USANatl Tsing Hua Univ, Hsinchu 30013, TaiwanShang, H, Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 106, Taiwan TI - Free-free radio emission from young stellar objects AB - We calculate the centimeter wavelength free-free emission of the jets of young stellar objects (YSOs) with the X-wind model enhanced by a variety of physical processes. Using parameters characteristic of a Class I YSO with a mass-loss rate of similar to10(-6) M-circle dot, yr(-1), we obtain a 3.6 cm map and a spectral index that compare well with high spatial resolution observations of L1551 IRS 5. Models with lower mass-loss rates, appropriate for Class II YSOs with revealed optical jets, produce radio jets that are too weak to be detected at current sensitivity levels. In addition to demonstrating the consistency of the density distribution of the X-wind model with observations, we are able to obtain information on the processes that heat and ionize the inner jet, i.e., X-ray ionization and shock heating and ionization MH - Mexico|Michoacan MH - Taiwan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223634600018 L2 - ISM : Herbig-Haro objects;ISM : jets and outflows;radiation mechanisms : thermal;radio continuum : stars;stars : winds, outflows;MAGNETOCENTRIFUGALLY DRIVEN FLOWS; CONTINUUM EMISSION; X-WINDS; IRS 5; STARS; JETS; DISKS; PROTOSTARS; SYSTEM; MODEL SO - Astrophysical Journal 2004 ;612(1):L69-L72 12452 UI - 4726 AU - Shang H AU - Lizano S AU - Glassgold A AU - Shu F AD - Acad Sinica, Inst Astron & Astrophys, Taipei 106, TaiwanUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUniv Calif Berkeley, Dept Astron, Berkeley, CA 94720, USANatl Tsing Hua Univ, Hsinchu 30013, TaiwanShang, H, Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 106, Taiwan TI - Free-free radio emission from young stellar objects AB - We calculate the centimeter wavelength free-free emission of the jets of young stellar objects (YSOs) with the X-wind model enhanced by a variety of physical processes. Using parameters characteristic of a Class I YSO with a mass-loss rate of similar to10(-6) M, yr(-1), we obtain a 3.6 cm map and a spectral index that compare well with high spatial resolution observations of L1551 IRS 5. Models with lower mass-loss rates, appropriate for Class II YSOs with revealed optical jets, produce radio jets that are too weak to be detected at current sensitivity levels. In addition to demonstrating the consistency of the density distribution of the X-wind model with observations, we are able to obtain information on the processes that heat and ionize the inner jet, i.e., X-ray ionization and shock heating and ionization MH - Mexico|Michoacan MH - Taiwan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000223236100018 L2 - ISM : Herbig-Haro objects;ISM : jets and outflows;radiation mechanisms : thermal;radio continuum : stars;stars : winds, outflows;MAGNETOCENTRIFUGALLY DRIVEN FLOWS; CONTINUUM EMISSION; X-WINDS; IRS 5; STARS; JETS; DISKS; PROTOSTARS; SYSTEM; MODEL SO - Astrophysical Journal 2004 ;611(1):L69-L72 12453 UI - 5978 AU - Shapiro PR AU - Iliev IT AU - Raga AC AD - Univ Texas, Dept Astron, Austin, TX 78712, USAOsserv Astrofis Arcetri, I-50125 Florence, ItalyUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoShapiro, PR, Univ Texas, Dept Astron, Austin, TX 78712, USA TI - Photoevaporation of cosmological minihaloes during reionization AB - Energy released by a small fraction of the baryons in the Universe, which condensed out while the intergalactic medium (IGM) was cold, dark and neutral, reheated and reionized it by redshift 6, exposing other baryons already condensed into dwarf-galaxy minihaloes to the glare of ionizing radiation. We present the first gas dynamical simulations of the photoevaporation of cosmological minihaloes overtaken by the ionization fronts which swept through the IGM during the reionization epoch in the currently favoured Lambda cold dark matter (LambdaCDM) universe, including the effects of radiative transfer. These simulations demonstrate the phenomenon of I-front trapping inside minihaloes, in which the weak, R-type fronts which travelled supersonically across the IGM decelerated when they encountered the dense, neutral gas inside minihaloes, and were thereby transformed into D-type I-fronts, preceded by shock waves. For a minihalo with virial temperature below 10(4) K, the I-front gradually burned its way through the minihalo which trapped it, removing all of its baryonic gas by causing a supersonic, evaporative wind to blow backwards into the IGM, away from the exposed layers of minihalo gas just behind the advancing I-front. We describe this process in detail, along with some of its observable consequences, for the illustrative case of a minihalo of total mass 10(7) Mcircle dot, exposed to a distant source of ionizing radiation with either a stellar or quasar-like spectrum, after it was overtaken at redshift z = 9 by the weak, R-type I-front which ionized the IGM surrounding the source. For a source at z = 9 which emits 10(56) ionizing photons per second at 1 Mpc (or, equivalently, 10(52) ionizing photons per second at 10 kpc), the photoevaporation of this minihalo takes about 100-150 Myr, depending on the source spectrum, ending at about z = 7.5. Such hitherto neglected feedback effects were widespread during the reionization epoch. N-body simulations and analytical estimates of halo formation in the LambdaCDM model suggest that sub-kpc minihaloes such as these, with virial temperatures below 10(4) K, were so common as to cover the sky around larger-mass source haloes and possibly dominate the absorption of ionizing photons during reionization. This means that previous estimates of the number of ionizing photons per hydrogen atom required to complete reionization which neglected this effect may be too low. Regardless of their effect on the progress of reionization, however, the minihaloes were so abundant that random lines of sight through the high-z Universe should encounter many of them, which suggests that it may be possible to observe the processes described here in the absorption spectra of distant sources MH - Italy MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 69 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000220160700009 L2 - hydrodynamics;radiative transfer;galaxies : haloes;galaxies : high-redshift;intergalactic medium;cosmology : theory;H-II REGIONS; POST-COLLAPSE EQUILIBRIUM; PROBE WMAP OBSERVATIONS; GUNN-PETERSON TROUGH; DIGITAL SKY SURVEY; RADIATIVE-TRANSFER; INTERGALACTIC MEDIUM; INTERSTELLAR CLOUDS; PHOTODISSOCIATION REGIONS; INHOMOGENEOUS UNIVERSE SO - Monthly Notices of the Royal Astronomical Society 2004 ;348(3):753-782 12454 UI - 4553 AU - Shapovalova AI AU - Doroshenko VT AU - Bochkarev NG AU - Burenkov AN AU - Carrasco L AU - Chavushyan VH AU - Collin S AU - Valdes JR AU - Borisov N AU - Dumont AM AU - Vlasuyk VV AU - Chilingarian I AU - Fioktistova IS AU - Martinez OM AD - Russian AS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachaevo Cher, RussiaUniv Moscow, Sternberg Astron Inst, Moscow 119899, RussiaINAOE, Puebla 7200, MexicoObserv Paris, Sect Meudon, LUTH, F-92195 Meudon, FranceIsaac Newton Inst Chile, SAO Branch, St Petersburg, RussiaBenemerita Univ Autonoma Puebla, Fac Ciencias Fisicomatemat, Puebla 72000, MexicoIsaac Newton Inst Chile, Crimean Branch, Nauchnyi, UkraineShapovalova, AI, Russian AS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachaevo Cher, Russia TI - Profile variability of the H alpha and H beta broad emission lines in NGC 5548 AB - Between 4996 and 2002, we have carried out a spectral monitoring program for the Seyfert galaxy NGC 5548 with the 6 m and I m telescopes of SAO (Russia) and with the 2.1 m telescope of Guillermo Haro Observatory (GHO) at Cananea, Mexico. High quality spectra with S/N > 50 in the continuum near Halpha and Hbeta were obtained, covering the spectral range similar to(4000-7500) Angstrom with a (4.5 to 15) Angstrom-resolution. We found that both the flux in the lines and the continuum gradually decreased, reaching minimum values during May-June 2002. In the minimum state, the wings of Hbeta and Halpha became extremely weak, corresponding to a Sy1.8 type, not to a Sy1, as observed previously when the nucleus was brighter. The line profiles were decomposed into variable and constant components. The variable broad component is well correlated with the continuum variation. It consists of a double peaked structure with radial velocities similar to +/- 1000 km s(-1) relative to the narrow component. A constant component, whose presence is independent of the continuum flux variations, shows only narrow emission lines. The mean, rms, and the averaged over years, observed and difference line profiles of Hbeta and Halpha reveal the same double peaked structure. The relative intensity of these peaks changes with time. During 1996, the red peak was the brightest, while in 19982002, the blue peak became the brighter one. Their radial velocities vary in the similar to(500-1200) km s(-1) range. In 2000-2002 a distinct third peak appeared in the red wing of Halpha and Hbeta line profiles. The radial velocity of this feature decreased between 2000 and 2002: from the observed profiles, from similar to+(2500-2600) km s(-1) to similar to+2000 km s(-1) and is clearly seen on the difference profiles. The fluxes of the various parts of the line profiles are well correlated with each other and also with the continuum flux. The blue and red parts of the line profiles at the same radial velocities vary in an almost identical manner. Shape changes of the different parts of the broad line are not correlated with continuum variations and, apparently, are not related to reverberation effects. Changes of the integral Balmer decrement are, on average, anticorrelated with the continuum flux variations. This is probably due to an increasing role of collisional excitation as the ionizing flux decreases. The behavior of the Balmer decrement of the various parts of the line profiles was different in 1996-2000 as compared with the 2001 behavior. Our results favor the formation of the broad Balmer lines in a turbulent accretion disc with large and moving "optically thick" inhomogeneities, capable of reprocessing the central source continuum MH - France MH - Mexico|Puebla MH - Russia MH - Ukraine PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223659500016 L2 - galaxies : active;galaxies : Seyfert;galaxies : individual : NGC 5548;line : profiles;ACTIVE GALACTIC NUCLEI; MASSIVE BLACK-HOLES; ACCRETION DISKS; NGC 5548; SPIRAL SHOCKS; CONTINUUM EMISSION; SEYFERT-1 GALAXIES; OPTICAL-SPECTRUM; OUTER REGIONS; LONG-TERM SO - Astronomy & Astrophysics 2004 ;422(3):925-940 12455 UI - 3823 AU - Shchegrov AV AU - Maradudin AA AU - Mendez ER AD - Novalux Inc, Corp Headquarters, Sunnyvale, CA 94085, USAUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USACtr Invest Cientif Educ Super Ensenada, Dept Fis Aplicada, Ensenada 22800, Baja California, MexicoShchegrov, AV, Novalux Inc, Corp Headquarters, 1220 Midas Way, Sunnyvale, CA 94085 USA TI - Multiple scattering of light from randomly rough surfaces MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Optics U5 - S;Review AV - English IS - 0079-6638 UR - ISI:000224959900002 L2 - IMPEDANCE BOUNDARY-CONDITION; MONTE-CARLO SIMULATIONS; SECOND-HARMONIC GENERATION; SMALL-SLOPE APPROXIMATION; RANDOM METAL-SURFACE; OPTICAL 2ND-HARMONIC GENERATION; 2ND-ORDER KIRCHHOFF APPROXIMATION; ELECTROMAGNETIC-WAVE SCATTERING; ENHANCED BACKSCATTERING PEAK; PERFECTLY CONDUCTING SURFACE SO - Progress in Optics, Vol 46 2004 ;46():117-241 12456 UI - 5868 AU - Shellnutt JG AU - Dostal J AU - Keppie JD AD - St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, CanadaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoDostal, J, St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, Canada TI - Petrogenesis of the 723 Ma Coronation sills, Amundsen basin, Arctic Canada: implications for the break-up of Rodinia AB - The Coronation mafic sills and associated Natkusiak flood basalts in Arctic Canada are part of the similar to723 Ma Franklin igneous events, a flood basalt and dyke swarm province that extends across the southern Arctic of North America and Greenland. Two representative sills, 70 and 25 m thick, respectively outcrop near Coronation Gulf in Nunavut. They are composed of clinopyroxene, plagioclase, olivine and Fe-Ti oxides, and have tholeiitic composition similar to the Natkusiak basalts. Their epsilon(Nd) values range between +4.2 and +5.9 and have (La/Yb)(n) ratios of similar to1.5-2. These rocks are mantle derived and were affected by minor crustal contamination. Compositional variations indicate that the Coronation sills have experienced extensive fractionation including flow differentiation during emplacement and show increased differentiation from, west to east, across the province, a feature similar to the Mackenzie dyke swarm. However, the Mackenzie dyke swarm and the Franklin igneous events have distinct chemical composition. The Franklin rocks are related to a mantle plume located near Victoria Island at the center of the dyke swarm and could represent an offshoot from the superplume related to the break-up of Rodinia. The absence of such dykes and sills in Siberia argues against locating Siberia against northern Laurentia in a Rodinia reconstruction. (C) 2003 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0301-9268 UR - ISI:000220445200007 L2 - neoproterozoic;sills;mantle plume;Amundsen basin;tlioleiitic basalts;Rodinia;TRACE-ELEMENT GEOCHEMISTRY; COPPERMINE RIVER AREA; NORTHWEST-TERRITORIES; MANTLE PLUME; PALEOMAGNETIC RESULT; SIBERIAN CONNECTION; IGNEOUS EVENTS; BAFFIN-ISLAND; FLOOD BASALTS; RED SEDIMENTS SO - Precambrian Research 2004 ;129(3-4):309-324 12457 UI - 4276 AU - Shepherd DS AU - Borders T AU - Claussen M AU - Shirley Y AU - Kurtz S AD - Natl Radio Astron Observ, Socorro, NM 87801, USASonoma State Univ, Rohnert Pk, CA 94928, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoShepherd, DS, Natl Radio Astron Observ, POB O, Socorro, NM 87801, USA TI - The circumstellar environment of the early B protostar G192.16-3.84 and the discovery of a low-mass, protostellar core AB - We have observed the massive star-forming region associated with the early B protostar G192.16-3.84 in NH3(1, 1), 22.2 GHz H2O masers, 1.3 cm continuum emission, and at 850 mum. The dense gas associated with G192.16 is clumpy, is optically thin, and has a mass of 0.9 M-circle dot. The NH3 core is gravitationally unstable, which may signal that the outflow phase of this system is coming to an end. Water masers trace an ionized jet 0."8 (1600 AU at a distance of 2 kpc) north of G192.16. Masers are also located within 500 AU of G192.16; their velocity distribution is consistent with but does not strongly support the interpretation that the maser emission arises in a 1000 AU rotating disk centered on G192.16. Roughly 30" south of G192.16 (0.3 pc) is a compact, optically thick (tau = 1.2) NH3 core (called G192 S3) with an estimated mass of 2.6 M-circle dot. Based on the presence of 850 mum and 1.2 mm continuum emission, G192 S3 probably harbors a very young, low-mass protostar or protocluster. The dense gas in the G192 S3 core is likely to be gravitationally bound and may represent the next site of star formation in this region MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224366900025 L2 - circumstellar matter;HII regions;ISM : clouds;ISM : jets and outflows;stars : early-type;stars : formation;YOUNG STELLAR OBJECTS; SUBMILLIMETER CONTINUUM EMISSION; ULTRACOMPACT HII-REGIONS; CLERK-MAXWELL-TELESCOPE; LUMINOUS IRAS SOURCES; STAR-FORMING REGIONS; ROTATING-DISK; WATER MASERS; H2O MASERS; MOLECULAR OUTFLOWS SO - Astrophysical Journal 2004 ;614(1):211-220 12458 UI - 6358 AU - Shepherd DS AU - Kurtz SE AU - Testi L AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoIst Nazl Astrofis, Osservatorio Astrofis Arcetri, I-50125 Florence, ItalyShepherd, DS, Natl Radio Astron Observ, POB O, Socorro, NM 87801, USA TI - The nature of the massive young stars in W75N AB - We have observed the W75 N massive star forming region in SiO (J = 2-1 and J = 1-0) at 3"-5" resolution and in 6 cm, 2 cm, and 7 mm continuum emission at 1."4-0."2 resolution. The abundance ratio of [SiO]/[H-2] similar to 5-7 x 10(-11) is typical for what is expected in the ambient component of molecular clouds with active star formation. The SiO morphology is diffuse and centered on the positions of the ultracompact H II regions - no collimated, neutral jet was discovered. The ionized gas surrounding the protostars has emission measures ranging from 1 to 15 x 10(6) pc cm(-6), densities from 0.4 to 5 x 10(4) cm(-3), and derived spectral types of the central ionizing stars ranging from B0.5 to B2. Most of the detected sources have spectral indices that suggest optically thin to moderately optically thick H II regions produced by a central ionizing star. The spread in ages between the oldest and youngest early-B protostars in the W75 N cluster is 0.1-5 x 10(6) yr. This evolutionary timescale for W75 N is consistent with that found for early-B stars born in clusters forming more massive stars (M-* > 25 M-circle dot) MH - Italy MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188658100027 L2 - circumstellar matter;HII regions;ISM : jets and outflows;stars : formation;stars : mass loss;H-II REGIONS; MOLECULAR OUTFLOWS; STELLAR OBJECTS; IRAS 20126+4104; FORMING REGION; SIO EMISSION; SYSTEM; BIPOLAR; JET; DISK SO - Astrophysical Journal 2004 ;601(2):952-961 12459 UI - 5353 AU - Sheremetov L AU - Contreras M AU - Smirnov A AD - Inst Mexicano Petr, Mexico City 07730, DF, Mexico. Russian Acad Sci, St Petersburg Inst Informat & Automat, St Petersburg 199178, Russia TI - Implementation of an ontology sharing mechanism for multiagent systems based on web services AB - Development of dynamic open service environment for web based systems integration becomes a time challenge. In this paper, an approach based on the integration of agent technology with the functionality of Web Services (WS) is proposed. An interface allowing to expose the functionality of the multiagent system to web based systems and vice versa is implemented as a component of the CAPNET agent platform (AP) allowing to consume the services of an agent or group of agents residing on a FIPA compliant AP in a service oriented (non-agent like) way. Ontologies constitute the centrepiece of the knowledge retrieval, sharing and reuse mechanisms either on the web or among agents. In the case study, a web enabling Ontology Agent and a bridge WS have been implemented over the CAPNET to facilitate knowledge sharing within the KSNet framework. Implementation details are discussed MH - Mexico|Distrito Federal MH - Russia T3 - ADVANCES IN WEB INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlesher@imp.mx mcontrer@imp.mx smir@.iias.spb.su1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBAE37 AV - English IS - 0302-9743 UR - ISI:000221807000006 SO - 2004 ;():54-63 12460 UI - 4754 AU - Sheridan MF AU - Hubbard B AU - Carrasco-Nunez G AU - Siebe C AD - SUNY Buffalo, Dept Geol, Buffalo, NY 14260, USAUNAM, Ctr Geociencias, Queretaro, MexicoNatl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Veracruzana, Xalapa 91000, Veracruz, MexicoHubbard, B, US Geol Survey, 959 Natl Ctr, Reston, VA 22092, USA TI - Pyroclastic flow hazard at Volcan Citlaltepetl AB - Volcan Citlaltepetl (Pico de Orizaba) with an elevation of 5,675 m is the highest volcano in North America. Its most recent catastrophic events involved the production of pyroclastic flows that erupted approximately 4,000, 8,500, and 13,000 years ago. The distribution of mapped deposits from these eruptions gives an approximate guide to the extent of products from potential future eruptions. Because the topography of this volcano is constantly changing computer simulations were made on the present topography using three computer algorithms: energy cone, FLOW2D, and FLOW3D. The Heim Coefficient (mu), used as a code parameter for frictional sliding in all our algorithms, is the ratio of the assumed drop in elevation ( H) divided by the lateral extent of the mapped deposits ( L). The viscosity parameter for the FLOW2D and FLOW3D codes was adjusted so that the paths of the flows mimicked those inferred from the mapped deposits. We modeled two categories of pyroclastic flows modeled for the level I and level II events. Level I pyroclastic flows correspond to small but more frequent block-and-ash flows that remain on the main cone. Level II flows correspond to more widespread flows from catastrophic eruptions with an approximate 4,000-year repose period. We developed hazard maps from simulations based on a National Imagery and Mapping Agency ( NIMA) DTED-1 DEM with a 90 m grid and a vertical accuracy of +/-30 m. Because realistic visualization is an important aid to understanding the risks related to volcanic hazards we present the DEM as modeled by FLOW3D. The model shows that the pyroclastic flows extend for much greater distances to the east of the volcano summit where the topographic relief is nearly 4,300 m. This study was used to plot hazard zones for pyroclastic flows in the official hazard map that was published recently MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Veracruz MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 3 U4 - Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences;Water Resources U5 - J;Article AV - English IS - 0921-030X UR - ISI:000223119500003 L2 - Citlaltepetl;computer simulations;DEM;hazard zones;interactive viewing;Mexico;Pico de Orizaba;pyroclastic flows;volcano;PICO-DE-ORIZABA; SOUFRIERE HILLS VOLCANO; EASTERN MEXICO; DOME COLLAPSE; MONTSERRAT SO - Natural Hazards 2004 ;33(2):209-221 12461 UI - 4236 AU - Shi L AU - Oieda MM AD - Univ Veracruzana, Fac Estadist, Xalapa 91000, Veracruz, MexicoYunnan Univ, Dept Stat, Kunming 650091, Peoples R ChinaUniv Calgary, Calgary, AB T2N 1N4, CanadaOieda, MM, Univ Veracruzana, Fac Estadist, Apartado Postal 475, Xalapa 91000, Veracruz, Mexico TI - Local influence in multilevel regression for growth curves AB - Influence analysis is important in modelling and identification of special patterns in the data. It is well established in ordinary regression. However, analogous diagnostics are generally not available for the multilevel regression model, in which estimation involves a complex iterative algorithm. This paper studies the local influence of small perturbations on the parameter estimates in the multilevel regression model with application to growth curves. The estimation is based on the iterative generalized least-squares (IGLS) method suggested by Goldstein (Biometrika 73 (1986) 43). The generalized influence function and generalized Cook statistic (Biometrika 84(l) (1997) 175) of IGLS of unknown parameters under some specific simultaneous perturbations are derived to study the joint influence of subject units on parameter estimators. The perturbation scheme is introduced through a variance-covariance matrix of error variables. A one-step approximation formula is suggested for simplifying the computations. The method is examined on growth-curve data. (C) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Veracruz MH - Peoples R China PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0047-259X UR - ISI:000224184200009 L2 - longitudinal data;multilevel linear models;hierarchical linear models;random coefficients models;perturbation scheme;generalized cook statistic;GENERALIZED LEAST-SQUARES; MAXIMUM-LIKELIHOOD-ESTIMATION; MIXED MODELS; INFLUENCE MATRIX; DIAGNOSTICS; PARAMETERS; ALGORITHM; VARIANCE SO - Journal of Multivariate Analysis 2004 ;91(2):282-304 12462 UI - 3723 AU - Shin K AU - Han SY AU - Gelbukh A AU - Park J AD - Chung Ang Univ, Sch Comp Sci & Engn, Seoul 156756, South Korea. Natl Polytech Inst, Ctr Res Comp, San Pedro Zacatenco 07738, DF, Mexico TI - Advanced relevance feedback query expansion strategy for information retrieval in MEDLINE AB - MEDLINE is a very large database of abstracts of research papers in medical domain, maintained by the National Library of Medicine. Documents in MEDLINE are supplied with manually assigned keywords from a controlled vocabulary called MeSH terms, classified for each document into major MeSH terms describing the main topics of the document and minor MeSH terms giving more details on the document's topic. To search MEDLINE, we apply a query expansion strategy through automatic relevance feedback, with the following modification: we assign greater weights to the MeSH terms, with different modulation of the major and minor MeSH terms' weights. With this, we obtain 16% of improvement of the retrieval quality over the best known system MH - Mexico|Distrito Federal MH - South Korea T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlekcshin@archi.cse.cau.ac.kr hansy@cau.ac.kr jaehwa@cau.ac.kr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBE01 AV - English IS - 0302-9743 UR - ISI:000225085900053 SO - 2004 ;():425-431 12463 UI - 4166 AU - Shin K AU - Han SY AU - Gelbukh A AD - Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South KoreaInst Politecn Nacl, Ctr Computing Res, Mexico City 07738, DF, MexicoShin, K, Chung Ang Univ, Dept Comp Sci & Engn, Seoul 156756, South Korea TI - Balancing manual and automatic indexing for retrieval of paper abstracts AB - MEDLINE is a widely used very large database of abstracts of research papers in medical domain. Abstracts in it are manually supplied with keywords from a controlled vocabulary called MeSH. The MeSH keywords assigned to a specific document are subdivided into MeSH major headings, which express the main topic of the document, and MeSH minor headings, which express additional information about the document's topic. The search engine supplied with MEDLINE uses Boolean retrieval model with only MeSH keywords used for indexing. We show that (1) vector space retrieval model with the full text of the abstracts indexed gives much better results; (2) assigning greater weights to the MeSH keywords than to the terms appearing in the text of the abstracts gives slightly better results, and (3) assigning slightly greater weight to major MeSH terms than to minor MeSH terms further improves the results MH - Mexico|Distrito Federal MH - South Korea PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224026300026 SO - Text, Speech and Dialogue, Proceedings 2004 ;3206():203-210 12464 UI - 5414 AU - Shin K AU - Han SY AU - Gelbukh A AD - Chung Ang Univ, Inst Comp Sci & Engn, Seoul 156756, South Korea. Natl Polytech Inst, Ctr Res Comp, Mexico City, DF, Mexico TI - Advanced clustering technique for medical data using semantic information AB - MEDLINE is a representative collection of medical documents supplied with original full-text natural-language abstracts as well as with representative keywords (called MeSH-terms) manually selected by the expert annotators from a pre-defined ontology and structured according to their relation to the document. We show how the structured manually assigned semantic descriptions can be combined with the original full-text abstracts to improve quality of clustering the documents into a small number of clusters. As a baseline, we compare our results with clustering using only abstracts or only MeSH-terms. Our experiments show 36% to 47% higher cluster coherence, as well as more refined keywords for the produced clusters MH - Mexico|Distrito Federal MH - South Korea T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlekcshin@archi.cse.cau.ac.kr hansy@cau.ac.kr gelbukh@cic.ipn.mx1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600033 SO - 2004 ;():322-331 12465 UI - 5227 AU - Shinbrot T AU - Duong NH AU - Kwan L AU - Alvarez MM AD - Rutgers State Univ, Dept Biomed Engn, Piscataway, NJ 08854, USARutgers State Univ, Dept Chem & Biochem Engn, Piscataway, NJ 08854, USAInst Tecnol Estudios Super Monterrey, Monterrey 52926, MexicoShinbrot, T, Rutgers State Univ, Dept Biomed Engn, Piscataway, NJ 08854 USA TI - Dry granular flows can generate surface features resembling those seen in Martian gullies AB - Over the past decade or more, contradictory evidence of Martian climate, indicating that surface temperatures seldom if ever approach the melting point of water at midlatitudes, and geomorphic features, consistent with liquid flows at these same latitudes, have proven difficult to reconcile. In this article, we demonstrate that several features of liquid-erosional flows can be produced by dry granular materials when individual particle settling is slower than characteristic debris flow speeds. Since the gravitational acceleration on Mars is about one-third that on Earth, and since particle settling speeds scale with gravity, we propose that some (although perhaps not all) Martian geomorphological features attributed to liquid flows may in fact be associated with dry granular flows in the presence of reduced gravity MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 12 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000222037000010 L2 - MARS ODYSSEY; DEBRIS FLOWS; GROUND ICE; RUNOFF; MASSES; DUST SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(23):8542-8546 12466 UI - 4770 AU - Shmaliy YS AD - Univ Guanajuato, Salamanca 36730, Gto, MexicoKharkiv Natl Univ Radio Elect, Kharkov, UkraineShmaliy, YS, Univ Guanajuato, Salamanca 36730, Gto, Mexico TI - The noise conversion method for oscillatory systems AB - The paper addresses a method for calculating the amplitude and phase power spectral density (PSD) functions of an oscillatory system (resonator, oscillator, bandpass filter, selective circuit, etc.) via the PSDs of its intrinsic noise sources and relevant transformation coefficients. A systematic description of the method is given for the scalar and vector noises. As an illustration, the noise transformation coefficients are derived for a piezoelectric series branch with fluctuating motional inductance, capacity, and losses, in which static capacity is disregarded. We then clarify the rules regarding the shaping of either PSD function. The importance of this method resides in the fact that it enables us to study particular finite ranges of the PSD function without using differential equations MH - Mexico|Guanajuato MH - Ukraine PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Acoustics;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-3010 UR - ISI:000223157000004 L2 - QUARTZ-CRYSTAL OSCILLATORS; PHASE NOISE; MODEL; FLUCTUATIONS SO - Ieee Transactions on Ultrasonics Ferroelectrics and Frequency Control 2004 ;51(8):948-956 12467 UI - 2713 AU - Shoshani L AU - Contreras RG AU - Roldan ML AU - Moreno J AU - Lazaro A AU - Balda MS AU - Matter K AU - Cereijido M AD - IPN, CINVESTAV, Mexico City, DF, MexicoUniv Coll London, Inst Ophthalmol, London, England TI - The polarized expression of NA+,K+-ATPase in epithelia depends on the association between beta-subunits located in neighboring cells MH - United Kingdom MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Cell Biology U5 - J;Meeting Abstract AV - English IS - 1059-1524 UR - ISI:000224648803478 SO - Molecular Biology of the Cell 2004 ;15():435A-435A 12468 UI - 3989 AU - Shtinkov N AU - Desjardins P AU - Masut RA AU - Vlaev SJ AD - Ecole Polytech Montreal, Dept Genie Phys & Regroupement Quebecois Mat Poin, Montreal, PQ H3C 3A7, CanadaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 98068, MexicoShtinkov, N, Ecole Polytech Montreal, Dept Genie Phys & Regroupement Quebecois Mat Poin, Case Postale 6079,Succursale Ctr Ville, Montreal, PQ H3C 3A7, Canada TI - Lateral confinement and band mixing in ultrathin semiconductor quantum wells with steplike interfaces AB - We study theoretically the effects of lateral confinement on the electronic structure of strained ultrathin InAs/InP (001) quantum wells (QWs) with one-dimensional (wirelike) interface islands. We develop a theoretical approach allowing the efficient computational treatment of a large class of one-dimensional structures within the framework of the surface Green's-function matching formalism. Using the semiempirical sp(3)s* nearest-neighbor tight-binding model, we calculate the energies, spatial distributions, and orbital character of electronic states for islands oriented along the <010> and <110> directions. The presence of the interface steps gives rise to localized states and leads to a band-gap reduction and an increase of the splitting between heavy holes (HH) and light holes (LH). We observe significant changes in the orbital character of both localized and extended (QW) states, namely a large anisotropy of the in-plane p components in all subbands and an increase of the p(z) contribution to HH states. The valence-band structure depends strongly on the wire orientation. In <110>-oriented islands, the HH-LH mixing is significantly enhanced by the lateral potential, whereas in <010> structures there is no evidence for such enhancement. The observed effects influence the optical properties of the structures and may cause optical anisotropy, relax some of the selection rules, and enhance the oscillator strengths for both interband and intersubband transitions MH - Canada MH - Mexico|Zacatecas PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000224855900044 L2 - TIGHT-BINDING; INTERSUBBAND ABSORPTION; ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; WIRES; HETEROSTRUCTURES; SUPERLATTICES; DOTS; GAAS; ANISOTROPY SO - Physical Review B 2004 ;70(15): 12469 UI - 5971 AU - Shtinkov N AU - Vlaev SJ AD - Ecole Polytech, Dept Genie Phys, Montreal, PQ H3C 3A7, CanadaEcole Polytech, Grp Rech Phys & Technol Couches Minces, Montreal, PQ H3C 3A7, CanadaUniv Autonoma Zacatecas, Escuela Fis, Zacatecas 68098, MexicoShtinkov, N, Ecole Polytech, Dept Genie Phys, CP 6079,Succursale CentreVille, Montreal, PQ H3C 3A7, Canada TI - Intersubband absorption in n-type GaAs/AlGaAs(001) quantum wells: A tight-binding study AB - We present theoretical calculations of the intersubband absorption in the conduction band of GaAs/AlGaAs (001) quantum wells (QWs), performed using the sp(3)d(5)s* empirical tight-binding model and a Green's functions approach. The absorption spectra for both in-plane (TE) and perpendicular (TM) polarizations are calculated. The obtained TE/TM absorption ratio is in excellent agreement with recent experimental results. We find that the asymmetry of the QW potential has no significant effect on the TE/TM ratio. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Canada MH - Mexico|Zacatecas PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000220247000004 L2 - TRANSITIONS; CONDUCTION SO - Physica Status Solidi B-Basic Research 2004 ;241(3):R11-R13 12470 UI - 4665 AU - Sibgatullin NR AU - Sibgatullin IN AU - Garcia AA AU - Manko VS AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoMoscow MV Lomonosov State Univ, Fac Mech & Math, Moscow 119899, RussiaMoscow MV Lomonosov State Univ, Inst Mech, Moscow 119192, RussiaSibgatullin, NR, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07000, DF, Mexico TI - Magnetic fields of pulsars surrounded by accretion disks of finite extension AB - The problem of finding the magnetic field of a system consisting of a magnetized neutron star and a perfectly conducting accretion disk of finite extension is reduced to the solution of the integral Fredholm equation of the second kind. Unlike the pioneering works of Aly (1980), Riffert (1980), we admit that an arbitrary total electric current can flow in the disk with finite outer rim. Having regularized the Fredholm equation, we obtain a convenient method for the construction of the magnetic field. The distribution of the magnetic field along the disk is plotted for different values of the total current and the ratios between the outer and inner radii of the disk MH - Mexico|Distrito Federal MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000223348300026 L2 - accretion, accretion disks;magnetic fields;ROTATING NEUTRON-STAR; X-RAY SOURCES; ANGULAR-MOMENTUM; ENERGY-RELEASE; SURFACE; MATTER SO - Astronomy & Astrophysics 2004 ;422(2):587-590 12471 UI - 4201 AU - Sicilia-Aguilar A AU - Hartmann L AU - Briceno C AU - Contreras ME AU - Muzerolle J AU - Calvet N AD - Smithsonian Astrophys Observ, Cambridge, MA 02138, USACtr Invest Astron, Merida, VenezuelaUniv Autonoma Mexico, Mexico City, DF, MexicoUniv Arizona, Tucson, AZ 85721, USASicilia-Aguilar, A, Smithsonian Astrophys Observ, Cambridge, MA 02138 USA TI - Low-mass young stars in Cep OB2: Ages, distribution and accretion disks AB - We are studying the young clusters Tr37 and NGC7160 in the Cep OB2 region as part of a program to understand the evolution of accretion disks at the ages of disk dissipation and planet formation. Here, we present the first identifications of low mass ( spectral types K-M) members of the clusters and study the presence and characteristics of their accretion disks, finding evidences of disk evolution. Using optical photometry and spectroscopy, we have identified similar to 70 members in Tr37 and similar to 20 in NGC7160, confirming age estimates of 3 and 10 Myr respectively. Accretion rates are similar to 10(-8)M(.) yr(-1) in Tr37. We have not found any accreting members in NGC7160, suggesting that disk accretion generally ends before the age of 10 Myr, which is consistent with the results from other populations MH - Mexico|Distrito Federal MH - USA MH - Venezuela PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-640X UR - ISI:000224461300057 L2 - T Tauri stars;accretion disks;disk evolution;protoplanetary disk;planet formation;star formation;CEPHEUS BUBBLE; EVOLUTION; KINEMATICS SO - Astrophysics and Space Science 2004 ;292(1-4):457-463 12472 UI - 4579 AU - Sidelinger D AU - Anders B AU - Zuniga ML AU - Hamilton E AU - Urueta C AU - Blaschke G AU - Nader P AU - Reznik V AD - Univ Calif San Diego, Dept Pediat, Div Community Pediat, San Diego, CA 92103, USANaval Med Ctr San Diego, Dept Pediat, San Diego, CA, USAHosp Infantil Calif, Tijuana, BC, Mexico TI - La frontera que nos une. Teaching pediatric residents about the impact of the US/Mexico border on health MH - Mexico|Baja California MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591102079 SO - Pediatric Research 2004 ;55(4):353A-354A 12473 UI - 6225 AU - Sidhu TS AU - Baltazar DS AU - Palomino RM AU - Sachdev MS AD - Univ Western Ontario, Dept Elect & Comp Engn, London, ON N6A 5B9, CanadaNatl Polytech Inst, Dept Elect Engn, Mexico City, DF, MexicoUniv Saskatchewan, Dept Elect Engn, Saskatoon, SK S7N 0W0, CanadaSidhu, TS, Univ Western Ontario, Dept Elect & Comp Engn, London, ON N6A 5B9, Canada TI - A new method for determining settings of zone-2 distance relays AB - This paper presents a technique that increases the second-zone coverage of distance relays without causing overreach problems. The technique is based on the impedance seen by distance relays when faults are simulated on the reach of zone-1 relays. The approach checks the relay operation for the maximum as well as the minimum generation outputs of the power system. Simulations of different operating conditions of a power system in different configurations were used to test the approach. The proposed technique can be used for different reach setting for zone-1. Results show that it is possible to increase the coverage provided by zone-2 distance relays without causing coordination problems with the primary relays that protect the lines emanating from the remote bus MH - Canada MH - Mexico|Distrito Federal PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1532-5008 UR - ISI:000188995200004 L2 - relay settings;relay zones;ALGORITHMS SO - Electric Power Components and Systems 2004 ;32(3):275-293 12474 UI - 6512 AU - Sidhu TS AU - Baltazar DS AU - Palomino RM AU - Sachdev MS AD - Univ Western Ontario, Dept Elect & Comp Engn, London, ON N6A 5B9, CanadaInst Politecn Nacl, Dept Elect Engn, Mexico City 07738, DF, MexicoUniv Saskatchewan, Dept Elect Engn, Saskatoon, SK S7N 5A9, CanadaSidhu, TS, Univ Western Ontario, Dept Elect & Comp Engn, London, ON N6A 5B9, Canada TI - A new approach for calculating zone-2 setting of distance relays and its use in an adaptive protection system AB - This paper presents a method for calculating zone-2 setting of distance relays without causing coordination problems. The proposed method is based on the impedance seen by distance relays when faults are simulated on the reach of zone-1 of primary relays for the maximum and minimum generation outputs of the power system. It is shown that the proposed method increases the reach of zone-2 relays without causing coordination problems. The proposed method is modified for use in an adaptive protection system. It is shown that further improvements can be achieved when settings are calculated using the proposed method and the prevailing system conditions. Measures to alleviate the impact of communication failure are discussed. The proposed method and its adaptive version were applied to an existing power system and some results are reported in the paper MH - Canada MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8977 UR - ISI:000187886300011 L2 - adaptive protection;backup relaying;distance relays;power system protection SO - Ieee Transactions on Power Delivery 2004 ;19(1):70-77 12475 UI - 5901 AU - Siebe C AU - Rodriguez-Lara V AU - Schaaf P AU - Abrams M AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCALTECH, Jet Prop Lab, Pasadena, CA 91109, USASiebe, C, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Radiocarbon ages of Holocene Pelado, Guespalapa, and Chichinautzin scoria cones, south of Mexico City: implications for archaeology and future hazards AB - Pelado, Guespalapa, and Chichinautzin monogenetic scoria cones located within the Sierra del Chichinautzin Volcanic Field (SCVF) at the southern margin of Mexico City were dated by the radiocarbon method at 10,000, 2,800-4,700, and 1,835 years B.P., respectively. Most previous research in this area was concentrated on Xitle scoria cone, whose lavas destroyed and buried the pre-Hispanic town of Cuicuilco around 1,665+/-35 years B.P. The new dates indicate that the recurrence interval for monogenetic eruptions in the central part of the SCVF and close to the vicinity of Mexico City is <2,500 years. If the entire SCVF is considered, the recurrence interval is <1,700 years. Based on fieldwork and Landsat imagery interpretation a geologic map was produced, morphometric parameters characterizing the cones and lava flows determined, and the areal extent and volumes of erupted products estimated. The longest lava flow was produced by Guespalapa and reached 24 km from its source; total areas covered by lava flows from each eruption range between 54 (Chichinautzin) and 80 km(2) (Pelado); and total erupted volumes range between 1 and 2 km(3)/cone. An average eruption rate for the entire SCVF was estimated at 0.6 km(3)/1,000 years. These findings are of importance for archaeological as well as volcanic hazards studies in this heavily populated region MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000220421300001 L2 - Chichinautzin;scoria;radiocarbon;holocene;Trans-Mexican Volcanic Belt;hazards, archaeology;POPOCATEPETL VOLCANO; CINDER CONES; TIME SCALE; STRATIGRAPHY; CALIBRATION; TETIMPA; VALLEY; HAWAII; FRONT; BELT SO - Bulletin of Volcanology 2004 ;66(3):203-225 12476 UI - 6325 AU - Siebe C AU - Rodriguez-Lara V AU - Schaaf P AU - Abrams M AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCALTECH, Jet Prop Lab, Pasadena, CA 91109, USASiebe, C, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Geochemistry, Sr-Nd isotope composition, and tectonic setting of Holocene Pelado, Guespalapa and Chichinautzin scoria cones, south of Mexico city AB - Holocene Pelado, Guespalapa and Chichinautzin monogenetic scoria cones and associated lava flows located within the Sierra del Chichinautzin Volcanic Field (SCVF) at the southern margin of Mexico City were mapped and sampled for mineralogical and chemical analyses. With the exception of Paricutin volcano in western Mexico, few scoria cones in the Trans-Mexican Volcanic Belt have ever been sampled in greater detail. Chemical analyses of rocks indicate that mafic products (e.g. Guespalapa and Chichinautzin) from individual volcanoes in the Sierra del Chichinautzin are characterized by substantial chemical variability, whereas high-silica andesite volcanoes (e.g. Pelado) are very uniform in composition. These findings have important bearings for regional tephrochronology. As a whole, rock compositions form a continuous coherent calc-alkaline suite, explicable by polybaric fractional crystallization +/- assimilation associated with successive stagnation at different depths along the ascent path. Trace element and Sr-Nd isotope analyses point toward a < 1-km-scale heterogeneous (enriched/depleted) mantle wedge underneath the SCVF. The recently proposed plume-origin for these rocks is not in accord with our data. Instead, magma origin is discussed in relation to the tectonically complex subduction process of the oceanic Cocos Plate underneath the continental North American Plate. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Geosciences, Multidisciplinary U5 - J;Review AV - English IS - 0377-0273 UR - ISI:000188546800002 L2 - Chichinautzin;scoria cone;geochemistry;Sr-Nd isotopes;trans-Mexican volcanic belt;SAN-LUIS-POTOSI; SUBDUCTION ZONE MAGMATISM; PLUME-RELATED MAGMATISM; LOWER CRUSTAL XENOLITHS; CALC-ALKALIC VOLCANISM; ISLAND BASALT TYPE; POPOCATEPETL VOLCANO; TRACE-ELEMENT; UPPER-MANTLE; PERIDOTITE XENOLITHS SO - Journal of Volcanology and Geothermal Research 2004 ;130(3-4):197-226 12477 UI - 1811 AU - Siegel SR AU - Reyes MEP AU - Barahona EC AU - Malina RM AD - Portland Community Coll, Portland, OR, USAEscuela Nacl Antropol Hist, Mexico City, DF, MexicoTarleton State Univ, Stephenville, TX, USA TI - Prevalence of overweight/obesity and physical activity scores in Mexico city school youth MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Sport Sciences U5 - J;Meeting Abstract AV - English IS - 0195-9131 UR - ISI:000228188300242 SO - Medicine and Science in Sports and Exercise 2004 ;36(5):S51-S51 12478 UI - 4148 AU - Sienra-Monge JJ AU - Ramirez-Aguilar M AU - Moreno-Macias H AU - Reyes-Ruiz NI AU - Del Rio-Navarro BE AU - Ruiz-Navarro MX AU - Hatch G AU - Crissman K AU - Slade R AU - Devlin RB AU - Romieu I AD - Inst Nacl Salud Publ, Cuernavaca 62508, Morelos, MexicoHosp Infantil Mexico Dr Federico Gomez, Mexico City, DF, MexicoUS EPA, Off Res & Dev, Human Studies Div, Res Triangle Pk, NC, USARomieu, I, Inst Nacl Salud Publ, Ave Univ 655,Col Santa Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Antioxidant supplementation and nasal inflammatory responses among young asthmatics exposed to high levels of ozone AB - The inflammatory response to ozone in atopic asthma suggests that soluble mediators of inflammation are released in response to oxidant stress. Antioxidants may alleviate additional oxidative stress associated with photochemical oxidant pollution. This study investigates the impact of antioxidant supplementation on the nasal inflammatory response to ozone exposure in atopic asthmatic children. We conducted a randomized trial using a double-blinded design. Children with asthma (n = 117), residents of Mexico City, were given randomly a daily supplement of vitamins (50 mg/day of vitamin E and 250 mg/day of vitamin C) or placebo. Nasal lavages were performed three times during the 4-month follow-up and analysed for content of interleukin-6 (IL-6), IL-8, uric acid and glutathione (GSx). IL-6 levels in the nasal lavage were increased significantly in the placebo group after ozone exposure while no increase was observed in the supplement group. The difference in response to ozone exposure between the two groups was significant (P = 0.02). Results were similar for IL-8, but with no significant difference between the groups (P = 0.12). GSx decreased significantly in both groups. Uric acid decreased slightly in the placebo group. Our data suggest that vitamin C and E supplementation above the minimum dietary requirement in asthmatic children with a low intake of vitamin E might provide some protection against the nasal acute inflammatory response to ozone MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Immunology U5 - J;Article AV - English IS - 0009-9104 UR - ISI:000224592700018 L2 - antioxidants;childhood asthma;cytokines/interleukins;ozone;BRONCHOALVEOLAR LAVAGE FLUID; AIR-POLLUTION; VITAMIN-E; POLLUTANTS; HUMANS; GLUTATHIONE; BIOMARKERS; DEPLETION; INJURY; TOOL SO - Clinical and Experimental Immunology 2004 ;138(2):317-322 12479 UI - 4692 AU - Sierra-Santoyo A AU - Barton HA AU - Hughes MR AD - US EPA, Expt Toxicol Div, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAIPN, CINVESTAV, Toxicol Sect, Mexico City, DF, MexicoHughes, MR, US EPA, Expt Toxicol Div, Natl Hlth & Environm Effects Res Lab, MD B143-01, Res Triangle Pk, NC 27711 USA TI - Liquid chromatography determination of the anti-androgen vinclozolin and its metabolites in rat serum AB - The objective of this study was to develop a chromatographic method for the analysis of the anti-androgen vinclozolin (V) and its metabolites 2-[[(3,5-dichlorophenyl)-carbamoyl]oxy]-2-methyl-3-butenoic acid (M1), 3',5'-dichloro-2-hydroxy-2-methylbut-3-enanilide (M2) and 3,5-dichloroaniline (M3) in rat serum. V, M1-M3 were resolved using an HPLC gradient program with a mobile phase consisting of 60-75% methanol: acetonitrile (70:30) and 0.05 M monobasic sodium phosphate buffer pH 3.3 at 1 ml/min, a C18 column, and monitored at 212 nm. Incubates of 0.01 M monobasic potassium phosphate buffer (PB) pH 7.4 and rat serum were spiked with V and its metabolites and processed by diluting samples (1:4) with 0.1 M PB pH 3.3, to limit methodological hydrolysis of analytes, followed by addition of acetonitrile. Recoveries of V, M1 and M2 ranged from 85 to 105%, whereas recovery of M3 was <25%. V was hydrolyzed to M1 and M2 after incubation in PB pH 7.4 and rat serum, with M1 the predominant metabolite. This method was successfully applied in the analysis of V and its metabolites in the serum of a male rat after oral administration of V (100 mg/kg). (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1570-0232 UR - ISI:000223240500015 L2 - vinclozolin;FUNGICIDE VINCLOZOLIN; DIFFERENTIATION; PERSISTENCE; EXPOSURE SO - Journal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences 2004 ;809(1):105-110 12480 UI - 5440 AU - Silant'ev NA AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoRussian Acad Sci, Pulkovo Astron Observ, St Petersburg 196140, RussiaSilant'ev, NA, Inst Nacl Astrofis Opt & Elect, Apartado Postal 51 & 216, Puebla 72000, Mexico TI - A nonlinear theory of turbulent diffusion AB - It is shown that the well-known conservation laws for magnetic helicity and passive-scalar fluctuation intensity in the case of negligible molecular diffusion require that the hierarchy of nonlinear equations for the averaged Green function and the hierarchy of Bethe-Salpeter-type equations for fluctuation intensity be treated in a mutually consistent manner. These hierarchies are obtained to the sixth order in turbulent velocity correlators. Asymptotic formulas describing the evolution of scalar fluctuations and magnetic field are presented. A number of new effects are revealed that strongly affect diffusion, but are beyond the scope of the frequently used model of a delta-correlated turbulent field. (C) 2004 MAIK "Nauka/Interperiodica" MH - Mexico|Puebla MH - Russia PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 1063-7761 UR - ISI:000221538300013 L2 - MAGNETIC-FIELD; ACOUSTIC TURBULENCE; FLUCTUATIONS; TRANSPORT; NUMBERS SO - Journal of Experimental and Theoretical Physics 2004 ;98(4):728-744 12481 UI - 5787 AU - Siller-Lopez F AU - Sandoval A AU - Salgado S AU - Salazar A AU - Bueno M AU - Garcia J AU - Vera J AU - Galvez J AU - Hernandez I AU - Ramos M AU - guilar-Cordova E AU - rmendariz-Borunda J AD - Univ Guadalajara, Inst Mol Biol Med & Gene Therapy, CUCS, Guadalajara, Jalisco, MexicoAdvantagene Inc, San Diego, CA, USAHosp Civil Guadalajara, Organ Publ Descentralizado, Guadalajara, Jalisco, MexicoArmendariz-Borunda, J, Univ Guadalajara, Inst Mol Biol Med & Gene Therapy, CUCS, Apdo Postal 2-123, Guadalajara, Jalisco, Mexico TI - Treatment with human metalloproteinase-8 gene delivery ameliorates experimental rat liver cirrhosis AB - Background & Aims: An extrahepatic human neutrophil collagenase complementary DNA (matrix metalloprotease-8) cloned in an adenovirus vector was used as a therapeutic agent in cirrhosis. Methods: A high titer of clinical-grade AdMMP8 was obtained. Results: HeLa cells transduced with AdMMP8 expressed recombinant matrix metalloprotease-8 messenger RNA and matrix metalloprotease-8 protein. Matrix metalloprotease-8 in culture sups showed enzymatic activity against native collagen type 1, which was inhibited by ethylenediaminetetraacetic acid, 1,10-phenanthroline, and tissue inhibitor of metalloprotease-1. In vivo transduction showed matrix metalloprotease-8 activity, and studies to establish the efficacy of this characterized vector were performed in CCl4 and bile duct-ligated cirrhotic rats. Transduction with 3 x 10(11) viral particles per kilogram resulted in hepatic detection of both messenger RNA and protein matrix metalloprotease-8. A consistent response in fibrosis reversal was observed in CCl4 rats. Liver fibrosis in bile duct-ligated cirrhotic animals was decreased in 45%, along with diminished hydroxyproline content, after AdMMP8 treatment. The expression of matrix metalloprotease-2 and matrix metalloprotease-3 was up-regulated in AdMMP8 rats. Free tissue inhibitor of metalloprotease-1, as an indirect measurement of active uncomplexed matrix metalloproteases, was also increased in the AdMMP8 groups. Transforming growth factor-beta messenger RNA was diminished, and matrix metalloprotease-9 and hepatocyte growth factor increased. Treatment in both models correlated with improvements in ascites, functional hepatic tests, and gastric varices, indicating diminished intrahepatic blood pressure in animals injected with AdMMP8. Conclusions: Therefore, therapy with the matrix metalloprotease-8 gene is promising for use in a clinical setting MH - Mexico|Jalisco MH - USA PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 30 U4 - Gastroenterology & Hepatology U5 - J;Article AV - English IS - 0016-5085 UR - ISI:000220688100024 L2 - HUMAN NEUTROPHIL COLLAGENASE; NECROSIS-FACTOR-ALPHA; MATRIX METALLOPROTEINASES; ACTIVATION MECHANISMS; HEPATIC FIBROGENESIS; FIBROSIS; EXPRESSION; THERAPY; FIBROBLASTS; INHIBITION SO - Gastroenterology 2004 ;126(4):1122-1133 12482 UI - 5662 AU - Silva-Hernandez ER AU - Nakano T AU - Verdalet-Guzman I AU - Ozimek L AD - Univ Alberta, Alberta Dairy Assoc Res Unit, Dept Agr Food & Nutrit Sci, Edmonton, AB T6G 2P5, CanadaUniv Veracruzana, Inst Ciencias Basicas, Xalapa 91000, Veracruz, MexicoSilva-Hernandez, ER, Univ Alberta, Alberta Dairy Assoc Res Unit, Dept Agr Food & Nutrit Sci, Edmonton, AB T6G 2P5, Canada TI - Comparison of glycomacropeptide isolated from raw and pasteurized goat milk AB - This study was undertaken to compare K-casein glycomacropeptide (GMP) isolated from raw and pasteurized goat milk using chemical analysis and sodium dodecyl sulfate (SDS) gel electrophoresis. Chemical composition of GMP-depleted whey fraction obtained after isolation of GMP from sweet whey was also determined. The quantitative analytical data except for calcium concentration were similar among the purified GMP samples prepared from the raw and pasteurized milk. The calcium concentration was lower in GMP from pasteurized milk compared to that from raw milk. Gel electrophoresis of GMP demonstrated that pasteurization generates GMP aggregates with increased mobility on SDS gels, and that the low temperature long time (63.5degreesC for 30 min) compared to high temperature short time (72degreesC for 15 s) pasteurization is more effective to induce this change. Studies of the GMP-depleted whey fraction suggest that this product with low threonine content is useful as an ingredient for infant formulas MH - Canada MH - Mexico|Veracruz PB - KEMPTEN: A V A AGRARVERLAG RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0026-3788 UR - ISI:000220898900008 L2 - SWEET WHEY; KAPPA-CASEIN; MACROPEPTIDE; CHROMATOGRAPHY; PURIFICATION; ACID SO - Milchwissenschaft-Milk Science International 2004 ;59(1-2):27-31 12483 UI - 4137 AU - Silva AL AU - Pohlan J AU - Centeno DS AD - ECOSUR, El Col Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Nacl Agr Managua, Managua, NicaraguaPohlan, J, ECOSUR, El Col Frontera Sur, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Agro-biological effects of green covers in Pitahaya cropping systems (Hylocereus undatus Britton & Rose) in Nicaragua AB - The effect of different green cover plants (Mucuna pruriens, Cajanus cajan, Canavalia ensiformis, Vigna unguiculata, Dolichos lablab) and traditional cropping at the content of organic matter and macronutrients in the soil, the biomass production, the presents of pests, and growth and yield parameters of four pitahaya clones was studied during two years in an field experiment, which was realized in Masaya - Tipitapa. The treatments with M. pruriens, C cajan and C. ensiformis produce more biomass and increase the content of organic matter and NPK in the soil. In both years the highest yield was obtained with the clon Orejona (2942 and 2547 kg ha(-1)). The number of fruits, the pitahaya yield and the soil use ratio was higher in the systems with cover crops than in the traditional cropping system MH - Mexico|Chiapas MH - Nicaragua PB - KASSEL: KASSEL UNIV PRESS GMBH RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - Spanish IS - 0041-3186 UR - ISI:000224527200007 L2 - Hylocereus undatus;green cover;organic matter;macronutrients;growth;yield;soil use ratio SO - Journal of Agriculture and Rural Development in the Tropics and Subtropics 2004 ;105(2):175-187 12484 UI - 3799 AU - Silva M AU - Poo-Ramirez JL AU - Wagner F AU - Jackson M AU - Laughlin M AD - Hosp Univ Austral, Pilar, ArgentinaHosp Med Sur, CIF BIOTECH, Mexico City, DF, Mexico3 Clin Res, Berlin, GermanySchering Plough Corp, Res Inst, Kenilworth, NJ 07033, USA TI - Comparison of peginterferon-alpha 2A and peginterferon-alpha 2B pharmacokinetics and pharmacodynamic in compare, a randomized, prospective, blinded trial MH - Argentina MH - Germany MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0270-9139 UR - ISI:000224102100070 SO - Hepatology 2004 ;40(4):192A-192A 12485 UI - 5762 AU - Silva PC AU - Pedroche FF AU - Chacana ME AU - guilar-Rosas R AU - guilar-Rosas LE AU - Raum J AD - Univ Calif Berkeley, Univ Herbarium, Berkeley, CA 94720, USAUniv Autonoma Metropolitana Iztapalapa, Dept Hidrobiol, Mexico City 09340, DF, MexicoUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoUniv Calif Santa Cruz, Dept Biol, Santa Cruz, CA 95064, USASilva, PC, Univ Calif Berkeley, Univ Herbarium, Berkeley, CA 94720, USA TI - Geographic correlation of morphological and molecular variation in Silvetia compressa (Fucaceae, Fucales, Phaeophyceae) AB - Silvetia compressa is a common member of the upper intertidal fucoid community on the Pacific coast of North America from Humboldt County, California, to Punta Baja, Baja California, Mexico, including coastal islands. On the mainland, there is considerable morphological variability involving robustness, branching pattern, and sire and shape of receptacles. A latitudinal cline is not evident. By contrast. there is relatively little morphological variability among populations in the Channel Islands of southern California and coastal islands of northern Baja California. These insular populations are perceptibly distinct from all mainland populations except for several in northern Baja California. After comparing populations from various parts of the range of the species, including all coastal islands, we conclude that two subspecies may be recognized. In subsp. compressa, which occurs only on the mainland, the frond is robust and straggly, with dichotomous branching that tends to be irregular, and with linear receptacles often tapered to a point. In the newly described subsp. deliquescens, which is chiefly insular but also occurs on the coast of northern Baja California, the fronds form hemispherical clumps, with densely and regularly branched slender axes and short, blunt, ellipsoidal receptacles. A few populations on the Monterey Peninsula in which the fronds are unusually delicate were described by Setchell and Gardner as f. gracilis, to which was assigned a population from Santa Catalina Island. We conclude that the Monterey Peninsula populations of f. gracilis constitute an ecotype of subsp. compressa, whereas the Santa Catalina Island population is referable to subsp. deliguescens. Comparison of nucleotide sequences from the ITS regions of rDNA revealed no molecular differentiation in populations of subsp. compresses from Baja California and central California, including those assignable to f. gracilis. The sequence in the three populations of subsp. deliguescens was identical, but differed by 2 by (0.3%) from that of subsp. compresses MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - LAWRENCE: INT PHYCOLOGICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0031-8884 UR - ISI:000220623200006 L2 - PELVETIA SO - Phycologia 2004 ;43(2):204-214 12486 UI - 3148 AU - Silveira-Coffigny R AU - Prieto-Trujillo A AU - scencio-Valle F AD - Fisheries Res Ctr, Havana, CubaNW Biol Res Ctr, Baja California, MexicoSilveira-Coffigny, R, Fisheries Res Ctr, 5ta Ave & 246, Havana, Cuba TI - Effects of different stressors in haematological variables in cultured Oreochromis aureus S AB - Since haematological variables can be used to assess the health state in cultured fish, a haematological characterization of clinically healthy Oreochromis aureus was done to establish the reference indices of this species. Fish were subjected to different stressed conditions (bacterial infection, nitrite intoxication, malachite green overdose) to study the changes in the haematological indices and its relation with the health condition. This species showed microcytic anaemia under experimental bacterial infection by Corynebacterium sp.; anaemia, neutrophilia and erythrocytes deformation following nitrite intoxication and medication overdose with malachite green. (C) 2004 Elsevier Inc. All rights reserved MH - Cuba MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism;Toxicology;Zoology U5 - J;Article AV - English IS - 1532-0456 UR - ISI:000227120600010 L2 - anaemia;Corynebacterium sp.;haematology;malachite green;nitrite;Oreochromis aureus;reference indices;stress;CATFISH ICTALURUS-PUNCTATUS; CHANNEL CATFISH; IRON-DEFICIENCY; RAINBOW-TROUT; NITRITE; FISH; LEUKOCYTES; TOXICITY; TILAPIA; BLOOD SO - Comparative Biochemistry and Physiology C-Toxicology & Pharmacology 2004 ;139(4):245-250 12487 UI - 6085 AU - Simons EM AU - Laundre JW AD - Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USAInst Ecol, AC Ctr Reg Durango, Dgo 34100, MexicoSimons, EM, Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209, USA TI - A large-scale regional assessment of suitable habitat for pygmy rabbits in southwestern Idaho AB - We tested a GIS-model developed to predict habitat suitability for the pygmy rabbit in a regional-scale analysis in Southwestern Idaho. Habitat was predicted to be suitable if big sagebrush was the dominant shrub type, the soil was <12.5% clay, slope was <15%, and aspect was between 0-120degrees or 300-360degrees. To assess the accuracy of the GIS-model, 137 sites (72 within predicted suitable habitat and 65 within predicted unsuitable habitat) were groundtruthed for presence of predicted soil and vegetation types. The GIS-model predicted suitable habitat with 80.5% accuracy and unsuitable habitat with 76.9% accuracy. The main factor limiting GIS-model performance was the accuracy of the vegetation layer. We also checked the 137 sites for pygmy rabbit activity to determine how well the GIS-model predicted use and non-use areas. The model predicted areas unused by pygmy rabbits (74%) better than areas used (42%). We concluded that the model is robust in predicting non-use areas and works adequately for predicting suitable and unsuitable habitat, but stress the need for accurate vegetation maps. Application of this model over the whole range of the pygmy rabbit would provide managers with a valuable tool in conserving this species MH - Mexico|Durango MH - USA PB - PULLMAN: WASHINGTON STATE UNIV RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 0029-344X UR - ISI:000189315800004 SO - Northwest Science 2004 ;78(1):33-41 12488 UI - 4417 AU - Sinclair EA AU - Bezy RL AU - Bolles K AU - Camarillo JL AU - Crandall KA AU - Sites JW AD - Brigham Young Univ, Dept Integrat Biol, Provo, UT 84602, USAMurdoch Univ, Div Sci & Engn, Murdoch, WA 6150, AustraliaNat Hist Museum Los Angeles Cty, Los Angeles, CA 90007, USAEscuela Nacl Estudios Prof Iztacala, CyMA, Lab & Colecc Herpetol, Mexico City, DF, MexicoBrigham Young Univ, Monte L Bean Life Sci Museum, Provo, UT 84602, USASinclair, EA, Brigham Young Univ, Dept Integrat Biol, Provo, UT 84602 USA TI - Testing species boundaries in an ancient species complex with deep phylogeographic history: Genus Xantusia (Squamata : Xantusiidae) AB - Identification of species in natural populations has recently received increased attention with a number of investigators proposing rigorous methods for species delimitation. Morphologically conservative species ( or species complexes) with deep phylogenetic histories ( and limited gene flow) are likely to pose particular problems when attempting to delimit species, yet this is crucial to comparative studies of the geography of speciation. We apply two methods of species delimitation to an ancient group of lizards ( genus Xantusia) that occur throughout southwestern North America. Mitochondrial cytochrome b and nicotinamide adenine dinucleotide dehydrogenase subunit 4 gene sequences were generated from samples taken throughout the geographic range of Xantusia. Maximum likelihood, Bayesian, and nested cladogram analyses were used to estimate relationships among haplotypes and to infer evolutionary processes. We found multiple well-supported independent lineages within Xantusia, for which there is considerable discordance with the currently recognized taxonomy. High levels of sequence divergence (21.3%) suggest that the pattern in Xantusia may predate the vicariant events usually hypothesized for the fauna of the Baja California peninsula, and the existence of deeply divergent clades (18.8% - 26.9%) elsewhere in the complex indicates the occurrence of ancient sundering events whose genetic signatures were not erased by the late Wisconsin vegetation changes. We present a revised taxonomic arrangement for this genus consistent with the distinct mtDNA lineages and discuss the phylogeographic history of this genus as a model system for studies of speciation in North American deserts MH - Australia MH - Mexico|Distrito Federal MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Evolutionary Biology U5 - J;Review AV - English IS - 0003-0147 UR - ISI:000224079600011 L2 - species boundaries;phylogeography;mtDNA;maximum likelihood;Bayesian analysis;nested clade analysis;Xantusia;MITOCHONDRIAL-DNA SEQUENCES; CLADISTIC-ANALYSIS; BAJA-CALIFORNIA; PHYLOGENETIC-RELATIONSHIPS; GEOGRAPHICAL-DISTRIBUTION; PHENOTYPIC ASSOCIATIONS; MOLECULAR SYSTEMATICS; POPULATION HISTORY; MTDNA SEQUENCES; NIGHT LIZARD SO - American Naturalist 2004 ;164(3):396-414 12489 UI - 5169 AU - Singh J AU - Dominguez M AU - Jaiswal R AU - Adams GP AD - Univ Saskatchewan, Dept Vet Biomed Sci, Western Coll Vet Med, Saskatoon, SK S7N 5B4, CanadaUniv Autonoma Tamaulipas, Fac Vet Med & Zootecnia, Cd Victoria, Tamaulipas, MexicoSingh, J, Univ Saskatchewan, Dept Vet Biomed Sci, Western Coll Vet Med, 52 Campus Dr, Saskatoon, SK S7N 5B4, Canada TI - A simple ultrasound test to predict the superstimulatory response in cattle AB - We tested the hypotheses that: (1) the superstimulatory response is related to the intrinsic number of follicles recruited into a follicular wave; and (2) the number of follicles recruited into a wave is correlated to the number of follicles recruited into the successive wave. A positive correlation will form the basis of a test for predicting the superstimulatory response. Cows (n = 141) were treated with estradiol and progesterone to synchronize follicular wave emergence (first synchronization) and ranked according to the number of follicles greater than or equal to2 mm at wave emergence to select the upper and lower 10% of the herd. Follicular wave emergence was synchronized again in the high-end (n = 16) and low-end (n = 20) groups (second synchronization), and cows were treated with FSH twice daily for 3 days. High-end cows had a greater number of follicles (P < 0.001) than low-end cows at the time of wave emergence after both the first and second synchronizations in the 2-3 and 4-6 min categories. The numbers of 2-3 and 4-6 mm follicles at wave emergence after the first and second synchronizations were positively correlated (P < 0.001; r = 0.77 and 0.71, respectively). Endogenous FSH peak at the time of wave emergence was higher in the low-end group than in the high-end group. Superstimulatory treatment resulted in more than double the number of follicles (P < 0.003) in the 5-7 mm and greater than or equal to8 mm categories in the high-end group than in the low-end group (16.8 +/- 2.2 versus 8.1 +/- 0.9 and 22.7 +/- 4.1 versus 9.7 +/- 1.6, respectively). The number of follicles >5 and >8 mm at the end of superstimulation was positively correlated (P < 0.001) with the total number of follicles greater than or equal to2 mm at the time of wave emergence after both the first (r = 0.64 and 0.54, respectively) and second (r = 0.65 and 0.5, respectively) synchronizations. Based on the results of this study, the superstimulatory response can be predicted by the number of follicles greater than or equal to2 mm at wave emergence. For practical purposes, practitioners can expect the number of follicles >5 mm after ovarian superstimulation to be approximately 71 % of the number of follicles >2 mm at the time of wave emergence. Results validated the proposed simple ultrasound-based test for predicting the superstimulatory response of individual cows. (C) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Tamaulipas PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 14 U4 - Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0093-691X UR - ISI:000222154300021 L2 - cattle;follicular dynamics;superstimulation;superovulation;ultrasonography;wave emergence;FOLLICLE-STIMULATING-HORMONE; PREOVULATORY LH SURGE; SUPEROVULATORY RESPONSE; DOMINANT FOLLICLE; WAVE EMERGENCE; HOLSTEIN COWS; SERUM GONADOTROPIN; OVARIAN FOLLICLES; FSH PREPARATION; ESTROUS-CYCLE SO - Theriogenology 2004 ;62(1-2):227-243 12490 UI - 4404 AU - Singh SK AU - Pacheco JF AU - Bansal BK AU - Perez-Campos X AU - Dattatrayam RS AU - Suresh G AD - UNAM, Inst Geofis, Mexico City 04510, DF, MexicoGovt India, Dept Sci & Technol, New Delhi 110016, IndiaCALTECH, Seismol Lab, Pasadena, CA 91125, USAIndian Meteorol Dept, New Delhi 110003, IndiaSingh, SK, UNAM, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - A source study of the Bhuj, India, earthquake of 26 January 2001 (M-w 7.6) AB - We study the source time function (STF) and radiated seismic energy (E-R) of the M-w 7.6 Bhuj earthquake using the empirical Green's function (EGF) technique. Our estimations of the STF and E-R are based on teleseismic P waves and regional seismograms, respectively. We find that the STFs as a function of azimuth have a similar shape and nearly constant duration of 18 sec. This suggests that the rupture propagation was essentially radial. The STFs show a sharp rise in the first 6 sec. The E-R estimated from the EGF technique is 2.1 x 10(23) erg. We find that E-R'S computed from integration of corrected velocity-squared spectra of teleseismic P waves and regional seismograms are in excellent agreement with the E-R obtained from the EGF technique. Since the seismic moment, M-0, is 3.4 X 1 027 dyne cm, we obtain E-R/M-0 = 6.2 x 10(-5). The radiation efficiency, eta(R), during the Bhuj earthquake was low, about 0.23. The sharp rise of the STFs and eta(R) = 0.23 can be explained by Sato and Hirasawa's (1973) quasi-dynamic, circular source model with an effective stress of similar to300 bar and the ratio of rupture to shear-wave velocity, V-R/beta, of similar to0.5. The corresponding estimate of slip velocity at the center of the fault is 156 cm/sec. V-R/beta similar to 0.5 is in reasonable agreement with the duration of the STF and the reported dimension of the aftershocks, as well as with the results of inversion of teleseismic body waves. The observations may also be explained by a frictional sliding model, with gradual frictional stress drop and significant dissipation of energy on the fault plane. This model requires an average dynamic stress drop of about 120 bar and V-R/beta similar to 0.7 to explain both the rapid rise in the first 6 sec of the STFs and, along with a static stress drop of 200 bar, the observed E-R/M-0. High static stress drop is a common feature of most crustal earthquakes in stable continental regions. An examination of the available data, however, does not suggest that most of them also have relatively low radiation efficiency MH - India MH - Mexico|Distrito Federal MH - USA PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000223945300002 L2 - RADIATED SEISMIC ENERGY; FUTURE EARTHQUAKES; SOURCE PARAMETERS; APPARENT STRESS; GROUND MOTION; RUPTURE; RELEASE; SPECTRA SO - Bulletin of the Seismological Society of America 2004 ;94(4):1195-1206 12491 UI - 4405 AU - Singh SK AU - Garcia D AU - Pacheco JF AU - Valenzuela R AU - Bansal BK AU - Dattatrayam RS AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Complutense Madrid, Fac Ciencias Fis, Dept Geofis Meteorol, Madrid 28040, SpainGovt India, Dept Sci & Technol, New Delhi 110016, IndiaIndian Meteorol Dept, New Delhi 110003, IndiaSingh, SK, Univ Nacl Autonoma Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Q of the Indian shield AB - We analyze spectral attenuation of Lg waves to determine Q of the Indian shield. The dataset consists of four earthquakes recorded in the distance range of 240-2400 km. The new estimate, Q(f) = 800f(0.42) (0.1 Hz less than or equal to f less than or equal to 20 Hz), is based on a larger dataset than a previous estimate, Q(f) = 508f(0.48) (1 Hz less than or equal to f less than or equal to 20 Hz). The new Q(f) of the Indian shield is comparable to the Q in regions of eastern North America where its value is relatively high, for example, the Adirondack Mountains. It is also in agreement with previously reported Lg coda Q at f = 1 Hz for the Indian subcontinent. The revised Q(f) has important implications for the estimation of ground motions in the Indian shield region using the stochastic method since the recorded data, presently, come mostly from large distances MH - India MH - Mexico|Distrito Federal MH - Spain PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000223945300029 L2 - GROUND MOTION; LG ATTENUATION; UNITED-STATES; EARTHQUAKE; WAVES SO - Bulletin of the Seismological Society of America 2004 ;94(4):1564-1570 12492 UI - 4885 AU - Siu AW AU - Ortiz GG AU - itez-King G AU - To CH AU - Reiter RJ AD - Hong Kong Polytech Univ, Dept Optometry & Radiog, Lab Expt Optometry, Kowloon, Hong Kong, Peoples R ChinaCtr Invest Biomed Occidente IMSS, Div Neurociencias, Guadalajara, Jalisco, MexicoUniv Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78229, USADIC, Inst Nacl Psiquitria, Dept Neurofarmacol, Lorenzo Huipulco, MexicoSiu, AW, Hong Kong Polytech Univ, Dept Optometry & Radiog, Lab Expt Optometry, Kowloon, Hong Kong, Peoples R China TI - Effects of melatonin on the nitric oxide treated retina AB - Aims: Nitric oxide ( NO) is a free radical which reportedly causes damage to living cells. This study evaluated the damaging effect of NO and the protection of melatonin on the retina in vivo. Methods: Female Wistar rats ( 230 - 250 g) received two intraperitoneal injections of either melatonin ( 5 mg/kg) or vehicle alone. After general anaesthesia, the animals received 1 mul intravitreal injections of 0.9% saline and 1 mM sodium nitroprusside ( SNP) into the right eye and the left eye, respectively. The animals were divided into two groups and then sacrificed after 24 hours ( day 1) and 96 hours ( day 4). The mean inner retinal layer thickness (mIRLT), the number of retinas expressing hyperchromatic (HC) nuclei in the inner nuclear layer (INL) and the apoptotic ganglion cell detection were compared. \Results: After 1 day, SNP significantly increased the mIRLT by 45% ( p = 0.004), initiated more INL nuclear HC expression ( p = 0.01) and apoptotic nuclei ( p< 0.05) compared with the control eyes. Injection of melatonin ameliorated these changes. On day 4, SNP demonstrated similar effects in all parameters on the retina. After the injection of melatonin, both INL HC expression and apoptotic ganglion nuclei in the SNP treated eyes were similar to the controls but the mIRLT was significantly greater than in controls ( p = 0.006). Conclusion: Uncontrolled NO elevation caused morphological and nuclear changes in the retina. Melatonin significantly suppressed the NO induced increase in mIRLT, INL HC expression, and apoptotic ganglion cells on day 1, but not after day 4. Melatonin may have a protective role in the NO elevated retina MH - Mexico|Jalisco MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 2 U4 - Ophthalmology U5 - J;Article AV - English IS - 0007-1161 UR - ISI:000222727100023 L2 - INDUCED LIPID-PEROXIDATION; INTRAOCULAR-PRESSURE; OXIDATIVE STRESS; DNA-DAMAGE; VITAMIN-E; PEROXYNITRITE; DEGENERATION; SUPEROXIDE; RATS; EYE SO - British Journal of Ophthalmology 2004 ;88(8):1078-1081 12493 UI - 5741 AU - Sjostrom A AU - Kraemer M AU - Ohlsson J AU - Garay-Cerro G AU - Abrahamsson M AU - Villarreal G AD - Gothenburg Univ, Queen Silvias Hosp Children, Inst Clin Neurosci, Paediat Eye Unit, S-41685 Gothenburg, SwedenUniv Autonoma Nuevo Leon, Dept Ophthalmol, Monterrey, MexicoSjostrom, A, Gothenburg Univ, Queen Silvias Hosp Children, Inst Clin Neurosci, Paediat Eye Unit, S-41685 Gothenburg, Sweden TI - Subnormal Visual Acuity (SVAS) and albinism in Mexican 12-13-year-old children AB - Background: In a previous study the vision of 1046 12-13-year-olds in Sweden was examined. Of those 67 had some kind of visual disturbances and in 20 no obvious cause was found. In this group, defined as children with subnormal visual acuity syndromes (SVAS), albinism was shown to be a major cause to the visual dysfunction giving a prevalence of about 1%. This is about 100 times higher than previous figures. Albinism can therefore be the cause in many cases of unexplained low visual acuity, at least in Sweden. Subnormal visual acuity is usually found in 2-4% in a pediatric population and is often called 'amblyopia'. The Swedish study showed that in many cases lamblyopia' should be replaced by 'SVAS' and further investigation. The present Mexican study was designed identically to the Swedish study. The objective was to describe the distribution of visual acuity and the prevalence of ocular disorders, including incidence of subnormal visual acuity (SVAS) and the occurrence of albinism in a Mexican population of 12-13-year-olds. Subjects and methods: Altogether 1035 children, 12-13 years of age, were examined. A total number of 344 children were referred to the university pediatric eye clinic for further examination. 272 of these had simple refractive errors, 59 were diagnosed with an ophthalmological disorder and 13 children could not be pathologically classified. These were referred to a second ophthalmological examination, including VEP (Visual Evoked Potential) recordings. VEP reveals an asymmetric (right vs. left) cortical response after monocular stimulation in albinism. Results: No child showed iris translucency or any other typical albinoic sign. VEP was recorded from 11 children. Three children showed an asymmetric VEP and were classified as albinos. The VEP response was normal in 8 of the children. Conclusions: The results indicate that albinism is common in Mexico, although not as common as in a similar Swedish population. A prevalence of albinism of approximately 0.3% was found in the Mexican population, compared to approximately 1% in the Swedish study group. The number of albinos was much higher in both study groups than to be expected from previous estimates. The difference between the Swedish and the Mexican figures may be explained by the general difference in pigmentation between Sweden and Mexico and thus probably by the subsequent lower number of commonly occurring albino foci in the Mexican heritage. It is emphasised that in investigations of children with SVAS, also in countries with a generally high pigmentation level, electro-physiological examinations are important, to be able to reveal albinism, but also to exclude or verify other conditions in the SVAS group, for example neurometabolic conditions MH - Mexico|Nuevo Leon MH - Sweden PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Ophthalmology U5 - J;Article AV - English IS - 0012-4486 UR - ISI:000220867900002 L2 - albinism;population study;SVAS;VEP;SYSTEM; POTENTIALS; MATURATION; ANOMALIES; CHILDHOOD; VEP SO - Documenta Ophthalmologica 2004 ;108(1):9-15 12494 UI - 5185 AU - Skuratovsky I AU - Glot A AU - Di Bartolomeo E AU - Traversa E AU - Polini R AD - Univ Tecnol Mixteca, Div Estudios Posgrado, Huajuapan Leon 69000, Oaxaca, MexicoDniepropetrovsk Natl Univ, Dept Radioelectr, UA-49050 Dniepropestrovsk, UkraineUniv Roma Tor Vergata, Dipartimento Sci & Technol Chim, I-00133 Rome, ItalyGlot, A, Univ Tecnol Mixteca, Div Estudios Posgrado, Huajuapan Leon 69000, Oaxaca, Mexico TI - The effect of humidity on the voltage-current characteristic of SnO2 based ceramic varistor AB - Tin dioxide based ceramics in the SnO2-Bi2O3-CO3O4-Nb2O5-Cr2O3 system exhibit highly non-linear voltage-current characteristics (non-linearity coefficient reaches 55-60 in electric fields of about 3500 V cm(-1)) in parallel with high humidity sensitivity in low electric fields (humidity sensitivity coefficient reaches 10(5)). Such ceramics can be used for the fabrication of a device with combined varistor and humidity sensor properties. Voltage-current characteristics of ceramics with different amounts of bismuth oxide are studied in air with different relative humidity contents. (C) 2003 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Oaxaca MH - Ukraine PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 0955-2219 UR - ISI:000222117300007 L2 - varistors;sensors;electrical properties;SnO2;humidity;SENSORS SO - Journal of the European Ceramic Society 2004 ;24(9):2597-2604 12495 UI - 5123 AU - Slama J AU - Gruskova A AU - Papanova M AU - Kevicka D AU - Dosoudil R AU - Jancarik V AU - Gonzalez A AU - Mendoza G AD - Slovak Tech Univ, Fac Elect Engn & Informat Technol, Dept Electrotechnol, Bratislava 81219, SlovakiaSlovak Tech Univ, Fac Elect Engn & Informat Technol, Dept Electromagnet Theory, Bratislava 81219, SlovakiaCINVESTAV, Saltillo 25900, Coahuila, MexicoGruskova, A, Slovak Tech Univ, Fac Elect Engn & Informat Technol, Dept Electrotechnol, Ilkovicova 3, Bratislava 81219, Slovakia TI - Magnetic properties of Me-Zr substituted Ba-hexaferrite AB - Substituted M-type Ba hexaferrites of composition BaFe12-2xMexZrxO19 were investigated, where Me stands for Ni2+, Co2+ or Zn2+. The series with x varying from 0 to 0.6, were prepared by two processing routes. A Fe/Ba ratio of 10 for mechanical alloying and of 10.8 for the citrate precursor method was chosen. It was shown that (Co, Ni, Zn)-Zr doped Ba ferrite particles have positive temperature coefficient of H-c which decreases with increasing x. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Coahuila MH - Slovakia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236500171 L2 - substituted barium ferrites;precursor method;magnetic susceptibility;temperature coefficient of coercivity;FERRITE SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():385-387 12496 UI - 5889 AU - Smale M AU - Bellon MR AU - Jarvis D AU - Sthapit B AD - IPGRI, Washington, DC 20006, USAIFPRI, Washington, DC 20006, USAIFPRI, Maccarese, Fiumicino, ItalyCIMMYT, Mexico City 06600, DF, MexicoSmale, M, IPGRI, 2033 K St NW, Washington, DC 20006, USA TI - Economic concepts for designing policies to conserve crop genetic resources on farms AB - The future food supply of all societies depends on the exploitation of genetic recombination and allelic diversity for crop improvement, and many of the world's farmers depend directly on the harvests of the genetic diversity they sow for food and fodder as well as the next season's seed. On farm conservation is an important component of the global strategy to conserve crop genetic resources, though the structure of costs and benefits from on farm conservation differ from those associated with ex situ conservation in gene banks. A fundamental problem that affects the design of policies to encourage on farm conservation is that crop genetic diversity is an impure public good, meaning that it has both private and public economic attributes. This concept is defined and made operational in order to assist practitioners in identifying (1) least-cost sites for on farm conservation (2) the types of policy instruments that might be appropriate for supporting conservation once a site has been located. Published findings regarding prospects for on farm conservation as economies develop are summarized and empirical examples of suitable policies to support farmers' decisions are placed in the context of economics principles MH - Italy MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0925-9864 UR - ISI:000220397000002 L2 - crop genetic diversity;economic development;policy;on farm conservation;SOUTHEASTERN GUANAJUATO; BIOLOGICAL DIVERSITY; VARIETIES; MAIZE; AGRICULTURE; SELECTION; ADOPTION; MEXICO SO - Genetic Resources and Crop Evolution 2004 ;51(2):121-135 12497 UI - 3076 AU - Smirnov AV AU - Sheremetov LB AU - Chilov N AU - Cortes JR AD - Russian Acad Sci SPIIRAS, St Petersburg Inst Informat & Automat, St Petersburg 199178, RussiaInst Mexicano Petr, Mexico City 07730, DF, MexicoNatl Tech Univ, IPN, CIC, Comp Sci Res Ctr, Mexico City 07738, DF, MexicoAutonomous Metropolitan Univ, Mexico City 02200, DF, MexicoSmirnov, AV, Russian Acad Sci SPIIRAS, St Petersburg Inst Informat & Automat, 39 14th Line, St Petersburg 199178, Russia TI - Soft-computing technologies for configuration of cooperative supply chain AB - In this article, the problem of dynamic configuration of cooperative supply chain (CSC) as a dynamic, flexible and agile system is considered. Members of the CSC negotiate and compromise on the optimal configuration in a spirit of Cupertino, in order to meet commitments made to each other. Based on this framework, the proposed approach considers configuring as: (i) coalition formation and (ii) product and resource allocation tasks in multi-agent environment. To solve the configuring task, an application of different techniques of soft computing is examined. The first approach permits to find sub-optimal solution applying the theory of games with fuzzy coalitions. In this case, genetic algorithms (GA) are used to find solutions of the game. The second approach uses: ( i) genetic algorithms directly and ( ii) constraint satisfaction problem solving for resource allocation task. Ontologies codified as object oriented constraint networks are used for task description and decomposition. A multi-agent test-bed based on FIPA compliant agent platform is developed and used to conduct the experiments. The above techniques are compared and the simulation results are discussed. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Artificial Intelligence;Computer Science, Interdisciplinary Applications U5 - J;Article AV - English IS - 1568-4946 UR - ISI:000227166300008 L2 - configuration;game with fuzzy coalitions;constraint satisfaction;genetic algorithm;multi-agent system;cooperative supply chain SO - Applied Soft Computing 2004 ;4(1):87-107 12498 UI - 6049 AU - Smirnov YF AU - Campigotto C AD - Swiss Fed Off Informat & Telecom, CH-3003 Bern, SwitzerlandUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoMoscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119899, RussiaCampigotto, C, Swiss Fed Off Informat & Telecom, Monbijoustr 74, CH-3003 Bern, Switzerland TI - The quantum q-Krawtchouk and q-Meixner polynomials and their related D-functions for the quantum groups SUq(2) and SUq(1,1) AB - The complete comparative analysis of the quantum q-Krawtchouk and q-Meixner polynomials of a discrete variable on a nonuniform grid (x(s)=q(2s)) and the D-function for the quantum groups SUq(2) and SUq(1,1) is done. The complete set of characteristics of these polynomials (i.e., orthogonality relations, normalization factors, recurrent relations, the explicit analytical expressions, the Rodrigues formulas, the formulas of difference derivatives, various particular values and cases) are calculated. The correlations between the properties of the polynomials mentioned above and the D-functions for the quantum groups SUq(2) and SUq(1,1) are established. In the case of SUq(1,1) only D-functions for the positive discrete series of the unitary irreducible representations are considered. It is known that on the nonuniform grid x(s)=q(2s) there are two kinds of Krawtcbouk and Meixner polynomials. Also the properties of the second kind of these polynomials which are not connected to the D-functions are discussed. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0377-0427 UR - ISI:000220099900043 L2 - q-analogue;Krawtchouk polynomials;Meixner polynomials;D-function;CLEBSCH-GORDAN-COEFFICIENTS; ORTHOGONAL POLYNOMIALS; COULOMB SYSTEM; Q-ANALOG; OSCILLATOR SO - Journal of Computational and Applied Mathematics 2004 ;164-65():643-660 12499 UI - 5083 AU - Smit MA AU - Hunter JA AU - Sharman JDB AU - Scamans GM AU - Sykes JM AD - Univ Oxford, Dept Mat, Oxford OX1 3PH, EnglandUNAM, CIE, Temixco 62580, Morelos, MexicoALCAN Int Ltd, Banbury OX16 7SP, EnglandSykes, JM, Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England TI - Effects of thermal and mechanical treatments on a titanium-based conversion coating for aluminium alloys AB - The influence of mechanical deformation and heating on the protective performance of a chromium-free conversion treatment for aluminium alloys has been assessed by polarisation and AC impedance measurements. Protection is unlikely to be seriously compromised by typical production operations. (C) 2003 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Morelos PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0010-938X UR - ISI:000222402500008 L2 - corrosion;aluminium alloy;conversion coating;processing;pitting;impedance SO - Corrosion Science 2004 ;46(7):1713-1727 12500 UI - 2836 AU - Smith L AU - Tadano T AU - Drewien R AU - Terrazas AL AD - Texas Tech Univ, Lubbock, TX 79409, USASevielleta Natl Wildlife Range, Socorro, NM 87801, USAUniv Autonoma Chihuahua, Chihuahua 31000, Chihuahua, MexicoSmith, L, Texas Tech Univ, MS 2125, Lubbock, TX 79409, USA TI - Wildlife biologist, researcher - John P. Taylor - 1954-2004 MH - Mexico|Chihuahua MH - USA PB - BETHESDA: WILDLIFE SOC RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Zoology U5 - J;Biographical-Item AV - English IS - 0091-7648 UR - ISI:000227585400043 SO - Wildlife Society Bulletin 2004 ;32(4):1353-1354 12501 UI - 5617 AU - Soberon J AU - Peterson AT AD - Natl Autonomous Univ Mexico, Inst Ecol, Tlalpan 14010, DF, MexicoComis Nacl Biodivers, Tlalpan 14010, DF, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USASoberon, J, Natl Autonomous Univ Mexico, Inst Ecol, Perifer Insurgentes 4903, Tlalpan 14010, DF, Mexico TI - Biodiversity informatics: managing and applying primary biodiversity data AB - Recently, advances in information technology and an increased willingness to share primary biodiversity data are enabling unprecedented access to it. By combining presences of species data with electronic cartography via a number of algorithms, estimating niches of species and their areas of distribution becomes feasible at resolutions one to three orders of magnitude higher than it was possible a few years ago. Some examples of the power of that technique are presented. For the method to work, limitations such as lack of high-quality taxonomic determination, precise georeferencing of the data and availability of high-quality and updated taxonomic treatments of the groups must be overcome. These are discussed, together with comments on the potential of these biodiversity informatics techniques not only for fundamental studies but also as a way for developing countries to apply state of the art bioinformatic methods and large quantities of data, in practical ways, to tackle issues of biodiversity management MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 33 U4 - Biology U5 - J;Article AV - English IS - 0962-8436 UR - ISI:000221082100011 L2 - biodiversity informatics;species ranges;species niches;taxonomic capacity;SPECIES RICHNESS; POTENTIAL DISTRIBUTIONS; GEOGRAPHIC ANALYSIS; CONSERVATION; BIRDS; PLANT; TAXONOMY; HABITAT; DIVERSITY; PRIORITIZATION SO - Philosophical Transactions of the Royal Society of London Series B-Biological Sciences 2004 ;359(1444):689-698 12502 UI - 4963 AU - Sobolev K AU - Amirjanov A AD - Univ Autonoma Nuevo Leon, Fac Ingn Civil, Monterrey 66450, NL, MexicoEuropean Univ Lefke, Dept Comp Engn, Lefke, CyprusSobolev, K, Univ Autonoma Nuevo Leon, Fac Ingn Civil, AP 17,Ciudad Univ San Nicolas Garza, Monterrey 66450, NL, Mexico TI - A simulation model of the dense packing of particulate materials AB - A simulation model is proposed for the dense packing of particulate, spherical material. The model assumes that the centers of the spheres are randomly generated at the grid of the cubic lattice. The biggest possible spheres are packed first; they are limited by the sequence of minimum diameters, which are determined by a reduction coefficient and the number of packing trials. Based on these assumptions, a very fast packing algorithm was developed. Using this algorithm, the influence of geometrical parameters and model variables on the degree of packing and the corresponding distribution of particles was analyzed. According to the simulation results, three different modules are suggested to estimate the packing degree for a given particle distribution, and also to distinguish between 'initially loose' and 'initially pre-packed' conditions MH - Cyprus MH - Mexico|Nuevo Leon PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0921-8831 UR - ISI:000222699300006 L2 - simulation model;packing degree;distribution;particulate material;COMPUTER-SIMULATION; HARD-SPHERES; PARTICLES SO - Advanced Powder Technology 2004 ;15(3):365-376 12503 UI - 5403 AU - Sobolev K AU - Amirjanov A AD - Univ Autonoma Nuevo Leon, Inst Ingn Civil, Monterrey, MexicoEuropean Univ Lefke, Dept Comp Engn, Lefke, CyprusSobolev, K, Univ Autonoma Nuevo Leon, Inst Ingn Civil, Monterrey, Mexico TI - The development of a simulation model of the dense packing of large particulate assemblies AB - The dense packing of particulate assemblies is an enduring theoretical and practical problem. In spite of its apparent simplicity, this problem still remains challenging. Recent progress in the performance of computers boosted the development and realization of a number of effective packing algorithms. Yet, because of the complexity of the problem, many of existing methods have difficulties in handling large numbers of particles. A simulation model is proposed to overcome this. The model assumes that the centers of the spheres are randomly generated at the intersections of a cubic lattice. The largest possible spheres are packed first; subsequent spheres are limited by the set of minimum diameters, which is specified by the constraints imposed by two major parameters imitating the compaction gradient: a reduction coefficient and the number of packing trials. Importantly, the packing arrangements are not defined by the initially specified particle size distribution (as considered by many existing packing algorithms), but rather the most dense particle size distribution, along with the corresponding value of packing degree, is generated by the proposed model. Based on these criteria, a very fast algorithm was developed for simulating of the dense packing of large assemblies of particulate, spherical material (in the order of millions of particles). Using this approach, the influence of geometrical parameters and model variables on the degree of packing and the corresponding distribution of particles was studied. (C) 2004 Elsevier B.V. All rights reserved MH - Cyprus MH - Mexico|Nuevo Leon PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0032-5910 UR - ISI:000221629200015 L2 - simulation model;packing algorithm;packing degree;particle size distribution;particulate material;initially pre-packed state;RANDOM CLOSE PACKING; COMPUTER-SIMULATION; EQUAL SPHERES; HARD-SPHERES; PARTICLES; SPACE SO - Powder Technology 2004 ;141(1-2):155-160 12504 UI - 3329 AU - Soderberg BCG AU - Zehr PS AU - Kayali R AU - Villanueva-Rendon A AU - Robles-Resendiz O AU - Pena-Cabera E AD - W Virginia Univ, Dept Chem, Morgantown, WV 26506, USAUniv Guanajuato, Fac Quim, Guanajuato, Mexico TI - Synthesis of novel alkaloids using squaric acid esters MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223713800740 SO - Abstracts of Papers of the American Chemical Society 2004 ;228():U146-U146 12505 UI - 6051 AU - Sohlenkamp C AU - de Rudder KEE AU - Geiger O AD - Univ Nacl Autonoma Mexico, Ctr Invest Fijacion Nitrogeno, Cuernavaca 62210, Morelos, MexicoTech Univ Berlin, Inst Biotechnol, Berlin, GermanyGeiger, O, Univ Nacl Autonoma Mexico, Ctr Invest Fijacion Nitrogeno, Av Univ S-N,Apdo Postal 565-A, Cuernavaca 62210, Morelos, Mexico TI - Phosphatidylethanolamine is not essential for growth of Sinorhizobium meliloti on complex culture media AB - In addition to phosphatidylglycerol (PG), cardiolipin (CL), and phosphatidylethanolamine (PE), Sinorhizobium meliloti also possesses phosphatidylcholine (PC) as a major membrane lipid. The biosynthesis of PC in S. meliloti can occur via two different routes, either via the phospholipid N-methylation pathway, in which PE is methylated three times in order to obtain PC, or via the phosphatidylcholine synthase (Pcs) pathway, in which choline is condensed with CDP-diacylglycerol to obtain PC directly. Therefore, for S. meliloti, PC biosynthesis can occur via PE as an intermediate or via a pathway that is independent of PE, offering the opportunity to uncouple PC biosynthesis from PE biosynthesis. In this study, we investigated the first step of PE biosynthesis in S. meliloti catalyzed by phosphatidylserine synthase (PssA). A sinorhizobial mutant lacking PE was complemented with an S. meliloti gene bank, and the complementing DNA was sequenced. The gene coding for the sinorhizobial phosphatidylserine synthase was identified, and it belongs to the type 11 phosphatidylserine synthases. Inactivation of the sinorhizobial pssA gene leads to the inability to form PE, and such a mutant shows a greater requirement for bivalent cations than the wild type. A sinorhizobial PssA-deficient mutant possesses only PG, CL, and PC as major membrane lipids after growth on complex medium, but it grows nearly as well as the wild type under such conditions. On minimal medium, however, the PE-deficient mutant shows a drastic growth phenotype that can only partly be rescued by choline supplementation. Therefore, although choline permits Pes-dependent PC formation in the mutant, it does not restore wild-type-like growth in minimal medium, suggesting that it is not only the lack of PC that leads to this drastic growth phenotype MH - Germany MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000220098900011 L2 - ENCODING PHOSPHATIDYLSERINE SYNTHASE; PHOSPHOLIPID N-METHYLTRANSFERASE; ESCHERICHIA-COLI; SACCHAROMYCES-CEREVISIAE; RHIZOBIUM-MELILOTI; IN-VIVO; LACKING PHOSPHATIDYLETHANOLAMINE; PHOSPHATIDYLCHOLINE SYNTHASE; CLONING VECTORS; MEMBRANE-LIPIDS SO - Journal of Bacteriology 2004 ;186(6):1667-1677 12506 UI - 1813 AU - Sojo R AU - Martinez C AU - Martinez-Barreda JL AU - Martin-Urrilade JA AU - Lopez-Taylor J AU - Bouchard C AU - Rivera MA AD - Univ Puerto Rico, Sch Med, San Juan, PR 00936, USAInst Sinaloense Deporte, Culiacan, MexicoUniv San Pablo, CEU, MAPOMA, Madrid, SpainUniv Guadalajara, Guadalajara 44430, Jalisco, MexicoPennington Biomed Res Ctr, Baton Rouge, LA, USA TI - Association between CKMM genotype and endurance performance level in Hispanic marathon runners MH - Mexico|Sinaloa MH - Mexico|Jalisco MH - Spain MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Sport Sciences U5 - J;Meeting Abstract AV - English IS - 0195-9131 UR - ISI:000228188302370 SO - Medicine and Science in Sports and Exercise 2004 ;36(5):S260-S260 12507 UI - 5950 AU - Sokolowski MBC AU - Tonneau F AD - Univ Picardie, Fac Philosophie Sci Humaines & Sociales, Amiens 1, FranceUniv Guadalajara, Guadalajara, Jalisco, MexicoSokolowski, MBC, Univ Picardie, Fac Philosophie Sci Humaines & Sociales, Chemin Thil, Amiens 1, France TI - Human group behavior: the ideal free distribution in a three-patch situation AB - A group of 15 college students was exposed to repeated trials of a task in which money was available for choosing among three colors (blue, red, and green). The amount of winning tokens for each color was varied across phases to test whether group distribution would track the ratio of winning tokens between patches. Confirming previous reports on ideal free performance in humans, group choice proved sensitive to the available resources but tended to undermatch the ratio of winning tokens. The difference-equalization rule of Sokolowski, Tonneau, and Freixa i Baqu6 [Psychonom. Bull. Rev. 6 (1999) 157] gave a satisfactory fit to the data. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Jalisco PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0376-6357 UR - ISI:000220329600006 L2 - ideal free distribution;undermatching;difference equalization;humans;GROUP CHOICE; ANIMALS SO - Behavioural Processes 2004 ;65(3):269-272 12508 UI - 4710 AU - Solano-Peralta A AU - Sosa-Torres ME AU - Flores-Alamo M AU - El-Mkami H AU - Smith GM AU - Toscano RA AU - Nakamura T AD - Univ Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrado, Coyoacan 04510, DF, MexicoUniv St Andrews, Sch Phys & Astron, St Andrews KY16 9AJ, Fife, ScotlandUniv Nacl Autonoma Mexico, Inst Quim, Coyoacan 04510, DF, MexicoShizuoka Univ, Fac Engn, Dept Mat Sci & Technol, Hamamatsu, Shizuoka 4328561, JapanSosa-Torres, ME, Univ Nacl Autonoma Mexico, Fac Quim, Div Estudios Posgrado, Ciudad Univ, Coyoacan 04510, DF, Mexico TI - High-field EPR study and crystal and molecular structure of trans-RSSR-[CrCl2n4O(cyclam)]X (X = ZnCl2-, Cl- and Cl-4H2.5HCl) AB - For the first time, HF-EPR (94.5 GHz) spectroscopy has been used to determine crystal field parameters in chromium(III) coordination compounds. The large zero-field splitting parameters of the dark-green photochromic trans-RSSR-[CrCl(2)(2)(4)(2)(2)(2)((cyclam)])(ZnCl)(, 1, the red-purple trans-RSSR-[CrCl)((cyclam)]Cl, 2 and the red-purple trans-RSSR-[CrCl)(-(cyclam)]Cl4H)O0.5HCl, 3, where cyclam = 1,4,8,11-tetraazacyclotetradecane, have been obtained. A full analysis of EPR spectra at 94.5 GHz of diluted complexes 1, 2 and 3 at 300 K revealed that they are extremely sensitive to D and E values. The rhombic distortion was precisely determined for each compound. For 1, g = 2.01, D = -0.305 cm-1, E = 0.041 cm-1 and l E/D = 0.1396; for 2, g = 2.01; D = -0.348 cm-1, E = 0.042 cm-1 and l = E/D = 0.1206 and for 3, g = 1.99, D = -0.320 cm-1, E = 0.041 cm-1 and l = E/D = 0.1281. The EPR study at 94.5 GHz at 10 K allowed us to confirm the sign of the D value for all compounds. These data indicate that at room temperature the crystal field is mainly rhombic and as the temperature decreases, the rhombicity of the D tensor increases slightly. These found differences between 1, 2 and 3 allowed us to establish the importance of the intermolecular interactions in the solid state due to different hydrogen bonding networks in their crystalline arrangement MH - Japan MH - Mexico|Distrito Federal MH - United Kingdom PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 1477-9226 UR - ISI:000223222000013 L2 - ELECTRON-PARAMAGNETIC-RESONANCE; HIGH-FREQUENCY EPR; SPIN-RESONANCE; 1,5,9,13-TETRAAZACYCLOHEXADECANE LIGAND; ANGULAR VARIATION; COMPLEXES; SPECTRA; MANGANESE(III); SPECTROSCOPY; ABSORPTION SO - Dalton Transactions 2004 ;(16):2444-2449 12509 UI - 5328 AU - Solano A AU - Russo G AU - Playan A AU - Parisi M AU - DiPietro M AU - Scuderi A AU - Palumbo M AU - Renis M AU - Lopez-Perez MJ AU - Andreu AL AU - Montoya J AD - Univ Zaragoza, Dept Bioquim & Biol Mol & Celular, E-50013 Zaragoza, SpainUniv Catania, Pediat Clin, Catania, ItalyUniv Catania, Dipartimento Biochim & Biol Mol, Fac Farm, Catania, ItalyUniv Autonoma Estado Morelos, Fac Farm, Cuernavaca, Morelos, MexicoMontoya, J, Univ Zaragoza, Dept Bioquim & Biol Mol & Celular, Miguel Servet 177, E-50013 Zaragoza, Spain TI - De Toni-Debre-Fanconi syndrome due to a palindrome-flanked deletion in mitochondrial DNA AB - We report the molecular findings in a child presenting with sideroblastic anemia and proximal tubulopathy. Analysis of mitochondrial DNA (mtDNA) from fibroblasts showed the presence of a 3.3-kb single deletion in 50% of the genomes. This mutation is, unlike other previously reported deletions in tubulopathy patients, not flanked by direct repeat sequences but by palindrome sequences at the deletion breakpoints, suggesting an unusual mechanism for production of deletion. These findings further expand our knowledge of the syndrome of anemia and tubulopathy due to single deletions of mtDNA MH - Italy MH - Mexico|Morelos MH - Spain PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics;Urology & Nephrology U5 - J;Article AV - English IS - 0931-041X UR - ISI:000221752000017 L2 - De Toni-Debre-Fanconi;sideroblastic anemia;deletion;mitochondrial DNA;mitochondrial diseases;EXTERNAL OPHTHALMOPLEGIA; DIRECT REPEATS; INVOLVEMENT; DISEASES SO - Pediatric Nephrology 2004 ;19(7):790-793 12510 UI - 5251 AU - Solans-Monfort X AU - Branchadell V AU - Sodupe M AU - Zicovich-Wilson CM AU - Gribov E AU - Spoto G AU - Busco C AU - Ugliengo P AD - Univ Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Autonoma Barcelona, Dept Quim, Bellaterra 08193, SpainUgliengo, P, Univ Turin, Dipartimento Chim IFM, Via P Giuria 7, I-10125 Turin, Italy TI - Can Cu+-exchanged zeolites store molecular hydrogen? An ab-initio periodic study compared with low-temperature FTIR AB - Cu+-exchanged Si/Al 11: 1 chabazite has been studied ab initio using the periodic CRYSTAL03 computer code with Hartree-Fock and the hybrid B3LYP Hamiltonians to characterize the structures and energetics of the Cu+ ion sitting preference and its interaction with H-2. Two sites (I and IV) have been found to be stable for Cu+ ion: site 1, the most stable one, envisaging coordination in a six-membered zeolite ring and site IV in which the Cu+ ion sits in the largest eight-membered ring. Interaction of H-2 gives adsorption energies at B3LYP of -13 and -56 kJ/mol for sites I and IV, respectively. The B3LYP bathochromic harmonic H-2 frequency shifts are 847 and 957 cm(-1) for adsorption at sites I and IV, respectively, in good agreement with the shifts measured (1030 and 1081 cm(-1)) in the Cu-ZSM-5 system in which Cu+ ion is, respectively, three and bi-coordinated by the oxygen atoms of the zeolite framework. Analysis of the components of the adsorption energy, carried out within the cluster approach, revealed that charge transfer from the Cu(3d(pi)) orbital through the antibonding H-2(sigma(u)) and orbital polarization play a significant role in the H-2 adsorption energy, and cause the large bathochromic H-2 frequency shift MH - Italy MH - Mexico|Morelos MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 32 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000221965400028 L2 - HARTREE-FOCK GRADIENTS; GAUSSIAN-BASIS SETS; BINDING-ENERGIES; NO DECOMPOSITION; CARBON-MONOXIDE; CRYSTAL CODE; GASEOUS CUCL; IONS; IR; ADSORPTION SO - Journal of Physical Chemistry B 2004 ;108(24):8278-8286 12511 UI - 5051 AU - Solari LA AU - Keppie JD AU - Ortega-Gutierrez F AU - Ortega-Rivera A AU - Hames WE AU - Lee JKW AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Geociencias, Queretaro 76001, MexicoAuburn Univ, Dept Geol, Auburn, AL 36830, USAQueens Univ, Dept Geol, Kingston, ON K7L 3N6, CanadaSolari, LA, Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Phanerozoic structures in the grenvillian northern Oaxacan Complex, Southern Mexico: Result of thick-skinned tectonics AB - Shear zones and upright folds affecting the northern Oaxacan Complex are documented as follows: (1) SE-directed shearing dated at 479 +/- 4 Ma (Ar-40/Ar-39 biotite laser total fusion age); (2) E-directed thrusting dated at 247 3 Ma (Ar-40/Ar-39 biotite plateau age); (3) NW to NNW-trending, steeply inclined folds of mid-Triassic-Jurassic age bracketed between events (2) and (4); and (4) NNW-trending vertical shearing dated at 141 +/- 9 Ma (Ar-40/Ar-39 biotite laser total fusion age). Inasmuch as the northern Oaxacan Complex is inferred to have been exposed to conditions well above the similar to300degreesC closure temperature for argon in biotite since it was exhumed at similar to710-760 Ma, it is inferred that these ages record thermal re-equilibration associated with hot fluids flowing along active shear zones. These structural events correspond respectively with: (1) the onset of Paleozoic deposition in the Tremadocian, presumably associated with SE-directed, listric normal faulting/shearing; (2) E-vergent thrusting associated with the development of an are along the length of Mexico; (3) folding in sympathy with [he dextral shear during opening of the Gulf of Mexico; and (4) Jurassic-Cretaceous boundary, normal fault readjustments. These data indicate that the northern Oaxacan Complex was involved in thick-skinned tectonics during most Phanerozoic episodes of deformation MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 2 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000222487300003 L2 - GULF-OF-MEXICO; DIFFUSION; ZONE SO - International Geology Review 2004 ;46(7):614-628 12512 UI - 4244 AU - Soler L AU - Yanez MA AU - Chacon MR AU - guilera-Arreola MG AU - Catalan V AU - Figueras MJ AU - Martinez-Murcia AJ AD - Mol Diagnost Ctr, Ctra Ncnal, E-03300 Orihuela, Alicante, SpainUniv Muguel Hernandez, Dept Microbiol, E-03312 Orihuela, Alicante, SpainUniv Rovira & Virgili, Fac Med & Ciencias Salud, Unidad Microbiol, Dept Ciencias Med Basicas, E-43201 Reus, SpainLabaqua SA, E-03007 Alicante, SpainInst Politecn Nacl, Escuala Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoMartinez-Murcia, AJ, Mol Diagnost Ctr, Ctra Ncnal, 340,Km 29 Aptdo,169, E-03300 Orihuela, Alicante, Spain TI - Phylogenetic analysis of the genus Aeromonas based on two housekeeping genes AB - The phylogenetic relationships of all known species of the genus Aeromonas, and especially Aeromonas bestiarum and Aeromonas salmonicida, were investigated on 70 strains using the rpoD sequence, which encodes the sigma(70) factor. This analysis was complemented with the sequence of gyrB, which has already proven useful for determining the phylogenetic relationships in the genus. Nucleotide sequences of rpoD and gyrB showed that both genes had similar substitution rates ( < 2%) and a similar number of variable positions (34% for rpoD versus 32% for gyrB). Strain groupings by analysis of rpoD, gyrB and a combination of both genes were consistent with the taxonomic organization of all Aeromonas species described to date. However, the simultaneous analysis of both clocks improved the reliability and the power to differentiate, in particular, closely related taxa. At the inter-species level, gyrB showed a better resolution for differentiating Aeromonas sp. HG11/Aeromonas encheleia and Aeromonas veronii/Aeromonas culicicolal Aeromonas allosaccharophila, while rpoD more clearly differentiated A. salmonicida from A. bestiarum. The analysis of rpoD provided initial evidence for clear phylogenetic divergence between the latter two species MH - Mexico|Distrito Federal MH - Spain PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000224259100013 L2 - HYBRIDIZATION GROUP 11; ET-AL. 1990; NUCLEOTIDE-SEQUENCES; DNA HYBRIDIZATION; ESCHERICHIA-COLI; PHENOTYPIC DATA; GYRB GENE; IDENTIFICATION; PSEUDOMONAS; ENTEROPELOGENES SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():1511-1519 12513 UI - 3888 AU - Solis-Marin FA AU - Billett DSM AU - Preston J AU - Rogers AD AD - Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Lab Sistemat & Ecol Equinodermos, Mexico City 04510, DF, MexicoSOES, SOC, Southampton SO14 3ZH, Hants, EnglandBritish Antarctic Survey, Cambridge CB3 0ET, EnglandSolis-Marin, FA, Univ Nacl Autonoma Mexico, Inst Ciencias Mar & Limnol, Lab Sistemat & Ecol Equinodermos, Apdo Post 70-305, Mexico City 04510, DF, Mexico TI - Mitochondrial DNA sequence evidence supporting the recognition of a new North Atlantic Pseudostichopus species (Echinodermata : Holothuroidea) AB - A new species of the synallactid sea cucumber genus Pseudostichopus is described, P. aemaulatus sp. nov., based on genetic (DNA sequences of the mitochondrial gene Cytochrome Oxidase I [COI] gene) and morphological characters. A comparative molecular study with two other species of the same genus (P villosus and P. mollis) and from a different: Family (Isostichopus fuscus) was carried out in order to clarify its taxonomic identity. The nucleotide distance between P. aemulatus sp. nov. and P. villosus and P. mollis is sufficient to support distinct species status. The estimated difference in the number of amino acids, coded for by a partially sequenced COI gene, within the species of the family Synallactidae ranged from 4 to 18. The phylogenetic analysis clearly supports separate species status of these sympatric morphotypes, as indicated by the morphological analysis MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-3154 UR - ISI:000225063700036 L2 - NUCLEOTIDE-SEQUENCE; GENE ORGANIZATION; PHYLOGENY; PROGRAM SO - Journal of the Marine Biological Association of the United Kingdom 2004 ;84(5):1077-1084 12514 UI - 4109 AU - Solis-Weiss V AU - Bertrand Y AU - Helleouet MN AU - Pleijel F AD - UNAM, Inst Ciencias Mar & Limnol, ME-04510 Mexico City, DF, MexicoMuseum Natl Hist Nat, Dept Systemat & Evolut, CNRS, UMR 7138, F-75231 Paris 05, FranceMuseum Natl Hist Nat, Dept Milieux & Peuplements Aquat, USM 0401, BOME,CNRS,UMR 8044, F-75231 Paris 05, FranceMuseum Natl Hist Nat, Dept Systemat & Evolut, CNRS, UMR 7138, F-75231 Paris 05, FranceSolis-Weiss, V, Lab Biol Marina, Via Auguste Piccard 54, I-34136 Trieste, Italy TI - Types of polychaetous annelids at the Museum national d'Histoire naturelle, Paris AB - Until recently, the polychaete collection at Museum national d'Histoire naturelle, Paris (MNHN) contained a large number of types that were not labelled or recognised as types, including specimens deposited by Lamarck, Quatrefages, Saint-Joseph, Gravier and Fauvel. These have now been identified, catalogued, and transferred to a newly created type collection. We here publish a list of all catalogued types, including c. 1400 lots (vials and slides) for over 700 species names. Additionally, brief notes are provided about some of the most prominent scientists who have contributed substantially to the collection in the past MH - France MH - Italy MH - Mexico|Distrito Federal PB - PARIS CEDEX 05: PUBLICATIONS SCIENTIFIQUES DU MUSEUM, PARIS RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 1280-9551 UR - ISI:000224538100002 L2 - Annelida;Polychaeta;type collection;Museum national d'Histoire naturelle;Paris SO - Zoosystema 2004 ;26(3):377-384 12515 UI - 4792 AU - Solis-Weiss V AU - Aleffi F AU - Bettoso N AU - Rossin P AU - Orel G AU - Fonda-Umani S AD - Univ Nacl Autonoma Mexico, ICML, Lab Ecol Costera, Mexico City 04510, DF, MexicoLab Biol Marina, I-34010 Trieste, ItalyUniv Trieste, Dipartimento Biol, I-34100 Trieste, ItalySolis-Weiss, V, Univ Nacl Autonoma Mexico, ICML, Lab Ecol Costera, Apdo Postal 70-305, Mexico City 04510, DF, Mexico TI - Effects of industrial and urban pollution on the benthic macrofauna in the Bay of Muggia (industrial port of Trieste, Italy) AB - The benthic macrofauna. of the Bay of Muggia and its evolution in time was analysed in order to assess the impact of man-made pollution in this port area. The north and NE zones are totally industrialised while the southern zone is mainly used for tourism and aquaculture. The most important anthropic impacts were stagnation and direct urban and industrial discharges, which operated until the beginning of the 1990s. Forty-four stations were sampled in 1981, 12 of which were monitored over time (1975, 1981 and 1994). From 172 taxa 11 783 organisms were identified. Polychaetes were the richest group, followed by molluscs, crustaceans and echinoderms. The dominant species was Corbula gibba (39.5%) followed by Pectinaria koreni (9%). Uni- and multivariate analyses showed a declining pattern for the fauna along a gradient of environmental stress. The very high concentrations of heavy metals in the Bay's sediments, especially Pb, contrasted with the diversity and biological index values found, indicating that many species could survive these conditions. The enforcement of the Italian ecological laws regarding water pollution control benefited the local macrofauna and evidenced the resilience of the system. C gibba constituted a good biological indicator of zones of high instability (especially sedimentary) and of intermediate levels of pollution. (C) 2004 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0048-9697 UR - ISI:000222958700021 L2 - macrofauna;coastal pollution;biological indexes;Corbula gibba;northern Adriatic SO - Science of the Total Environment 2004 ;328(1-3):247-263 12516 UI - 3702 AU - Solis D AU - Klimova T AU - Cuevas R AU - Ramirez J AU - Lopez-Agudo A AD - CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, SpainUniv Nacl Autonoma Mexico, UNICAT, Dept Ingn Quim, Fac Quim, Mexico City 04510, DF, MexicoInst Mexicano Petr, Mexico City 07730, DF, MexicoLopez-Agudo, A, CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain TI - Hydrodesulfurization of gasoils over NiMo/Al2O3-H(or Ni)NaY zeolite hybrid catalysts AB - A series of hybrid catalysts constituted by NiMo/Al2O3 mixed with HNaY or Ni(1.45)NaY zeolite were prepared, and their activities in the hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) of an untreated gasoil and a commercially prehydrotreated gasoil were compared to those of conventional NiMo/Al2O3. The influence of HNaY zeolite loading on the activity of the hybrid catalysts was investigated with both untreated and hydrotreated feeds. The addition of increasing amounts of HNaY to NiMo/Al2O3 resulted in lower activities for the HDS and HDN of the untreated gasoil, being the decrease in HDS similar for all hybrid catalysts and in HDN proportional to the HNaY content. These catalysts have a very stable activity for HDS and decaying activity for HDN of the untreated gasoil. With the prehydrotreated gasoil, a small promoter effect (similar to20%) for initial HDS activity was observed with the addition of 5 wt.% of HNaY to NiMo/Al2O3, and then a marked decrease with further HNaY loading. However, all catalysts, included NiMo/Al2O3, suffered a rapid deactivation under the reactions conditions used, which was attributed to a desulfurization of the catalysts caused by the low conversion level obtained and, therefore, a low H2S partial pressure in the reactor. The addition of Ni(1.45)Y zeolite to NiMo/Al2O3, decreased slightly the HDS and HDN of the untreated gasoil and increased by a factor of about three and nine times the initial and stationary, respectively, HDS of the prehydrotreated gasoil. Analysis of the relative distribution of sulfur species in products explains the observed synergy and the role of the Ni(1.45)NaY zeolite in the deep HDS over hybrid catalysts. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000225613500023 L2 - hydrodesulfurization;hydrodenitrogenation;gasoil;NiMo catalyst;Y zeolite;MO SULFIDE CATALYSTS; DEEP DESULFURIZATION; HINDERED DIBENZOTHIOPHENES; SULFUR-COMPOUNDS; 4,6-DIMETHYLDIBENZOTHIOPHENE; DIESEL; NI; CHALLENGES; COMO/AL2O3; FUELS SO - Catalysis Today 2004 ;98(1-2):201-206 12517 UI - 3320 AU - Solis FJ AU - Jodar L AD - CIMAT, Guanajuato 36000, Gto, MexicoUniv Politecn Valencia, Inst Matemat Multidisciplinar, Valencia 46022, SpainSolis, FJ, CIMAT, Guanajuato 36000, Gto, Mexico TI - Quadratic regular reversal maps AB - We study families of quadratic maps in an attempt to understand the role of dependence on parameters of unimodal maps and its relationship with the computer-generated chaos observed in numerical simulations. Our specific goal is to give conditions on this dependence to avoid chaotic situations. We show several examples that describe in some generality the qualitative properties of quadratic maps MH - Mexico|Guanajuato MH - Spain PB - SYLVANIA: HINDAWI PUBLISHING CORPORATION RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 1026-0226 UR - ISI:000226549700005 L2 - MODEL SO - Discrete Dynamics in Nature and Society 2004 ;(2):315-323 12518 UI - 3878 AU - Solis FJ AU - Chen-Charpentier BC AD - Univ Wyoming, Dept Math, Laramie, WY 82071, USACIMAT, Guanajuato 3600, MexicoChen-Charpentier, BC, Univ Wyoming, Dept Math, Laramie, WY 82071, USA TI - Nonstandard discrete approximations preserving stability properties of continuous mathematical models AB - Most numerical methods for differential equations introduce spurious solutions. We study the method presented by Mickens to obtain exact nonstandard methods for some ordinary differential equations. We show how to generalize his method to equations with no known exact analytical solution, and show that the new scheme has better stability properties than Runge-Kutta methods. We apply the method to several examples. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000225058900002 L2 - nonstandard discrete approximation;stability SO - Mathematical and Computer Modelling 2004 ;40(5-6):481-490 12519 UI - 5181 AU - Solis FJ AU - Cortes JC AU - Cardenas OJ AD - CIMAT, Guanajuato 36240, MexicoUniv Politecn Valencia, E-46071 Valencia, SpainUniv Guanajuato, Guanajuato 36240, MexicoSolis, FJ, CIMAT, Guanajuato 36240, Mexico TI - The stability of the Keller-Segel model AB - We study initial integrable perturbations of uniform solutions of the Keller-Segel model. We found a stability criterion which depends on the difference between the coefficient of random motion of attractant molecules and the motility coefficient. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Software Engineering;Mathematics, Applied U5 - J;Article AV - English IS - 0895-7177 UR - ISI:000222144500002 L2 - chemotaxis;attractant;integrable perturbations;stability;motility;STATIONARY SOLUTIONS; CHEMOTAXIS; SYSTEMS SO - Mathematical and Computer Modelling 2004 ;39(9-10):973-979 12520 UI - 5481 AU - Solis FJ AU - Sanchez LJ AD - CIMAT, Guanajuato, MexicoUniv Politecn Valencia, E-46071 Valencia, SpainSolis, FJ, CIMAT, Guanajuato, Mexico TI - Nonisolated slow convergence in discrete dynamical systems AB - We introduce a new concept of time convergence that measures the nonisolated slowness of convergence of orbits for discrete dynamical systems. This concept permits us to classify the behavior of complicated slower discrete dynamical systems. We illustrate this fact with nontrivial examples. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0893-9659 UR - ISI:000221547800017 L2 - dynamical system;orbits;time of convergence;bifurcation;periodic points SO - Applied Mathematics Letters 2004 ;17(5):597-599 12521 UI - 5633 AU - Solorza S AU - Sahay PN AD - Ctr Invest Cient & Educ Super Ensenada, Dept Seismol, Ensenada 22860, Baja California, MexicoSahay, PN, CICESe, Dept Seismol, POB 434843, San Diego, CA 92143, USA TI - Standing torsional waves in a fully saturated, porous, circular cylinder AB - For dynamic measurement of the elastic moduli of a porous material saturated with viscous fluid using the resonance-bar technique, one also observes attenuation. In this article we have carried out the solution of the boundary-value problem associated with standing torsional oscillations of a finite, poroelastic, circular cylinder cast in the framework of volume-averaged theory of poroelasticity. Analysing this solution by eigenvalue perturbation approach we are able to develop expressions for torsional resonance and temporal attenuation frequencies in which the dependence upon the material properties are transparent. It shows how the attenuation is controlled by the permeability and the fluid properties, and how the resonance frequency drops over its value for the dry solid-frame due to the drag effect of fluid mass. Based upon this work we have a firm basis to determine solid-frame shear modulus, permeability, and tortuosity factor from torsional oscillation experiments MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000221049700037 L2 - porous media;standing waves;torsional waves;ELASTIC-WAVES; PROPAGATION; MEDIA; FLUID; ATTENUATION; DEFORMATION SO - Geophysical Journal International 2004 ;157(1):455-473 12522 UI - 4712 AU - Solorzano S AU - Baker AJ AU - Oyama K AD - Natl Autonomous Univ Mexico, Ctr Invest Ecosistemas, Morelia 58190, Michoacan, MexicoRoyal Ontario Museum, Ctr Biodivers & Conservat Biol, Toronto, ON M5S 2C6, CanadaSolorzano, S, Apartado Postal 21-041,CP 04021, Mexico City, DF, Mexico TI - Conservation priorities for Resplendent Quetzals based on analysis of mitochondrial DNA control-region sequences AB - The Resplendent Quetzal (Pharomachrus mocinno) is a threatened bird species classified into two putative Subspecies (P. m. mocinno and P. m. costaricensis) and distributed in cloud forests of seven countries in Mesoamerica. Because the birds are rare, tissue samples are difficult to obtain, but we analyzed genetic diversity in 25 quetzals from five countries based on 255 bp of domain I of the control region of mitochondrial DNA. Eight haplotypes were detected. Nucleotide diversity for Mexico (P. m. mocinno: 0.0021) and Panama (P. m. costaricensis: 0.0026) were low, and did not differ from the values estimated for other birds species it-respective of whether they were endangered. A haplotype tree rooted with the Pavonine Quetzal (P. pavoninus) recovered two reciprocally monophyletic clades corresponding to each subspecies, so we propose that each subspecies be considered as an evolutionarily significant unit for conservation planning. A minimum spanning network showed the number of genetic differences separating haplotypes within subspecies was small relative to the number of substitutions among them, indicating strong population subdivision (F-ST = 0.37). In spite of the limited sampling we propose that in conservation practice Mexico-Guatemala, Nicaragua, El Salvador, and Panama be considered preliminarily as independent conservation management units since they each have unique haplotypes. Additionally, these countries should construct international agreements to protect the natural vegetation corridors among cloud forests of Mesoamerica and to curtail the illegal trade of quetzals MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Michoacan PB - LAWRENCE: COOPER ORNITHOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Ornithology U5 - J;Article AV - English IS - 0010-5422 UR - ISI:000223234100001 L2 - evolutionarily significant units;Mesoamerica;mitochondrial DNA;management units;Pharomachrus mocinno;POPULATIONS; FRINGILLA; MIGRATION; UNITS; TIME SO - Condor 2004 ;106(3):449-456 12523 UI - 3416 AU - Somprasit C AU - Aguinaga M AU - Cisneros PL AU - Torsky S AU - Carson SA AU - Buster JE AU - Amato P AU - Mcadoo SL AU - Simpson JL AU - Bischoff FZ AD - Baylor Coll Med, Dept Obstet & Gynecol, Houston, TX 77030, USABaylor Coll Med, Dept Human & Mol Genet, Houston, TX 77030, USAThammasat Univ, Dept Obstet & Gynecol, Pathum Thani, ThailandInst Nacl Perinatol, Dept Genet, Mexico City, DF, MexicoBischoff, FZ, Baylor Coll Med, Dept Obstet & Gynecol, 6550 Fannin St,Suite 885, Houston, TX 77030 USA TI - Paternal gonadal mosaicism detected in a couple with recurrent abortions undergoing PGD: FISH analysis of sperm nuclei proves valuable AB - Many couples are now seeking preimplantation genetic diagnosis (PGD) and fluorescence in-situ hybridization (FISH) as an alternative approach to avoid spontaneous abortion by ensuring transfer of presumed chromosomally normal embryos. This case report describes unexpected findings in a couple having three spontaneous abortions and two failed IVF cycles. In two IVF PGD cycles, four of 13 (30.8%) embryos (blastomeres) demonstrated duplication involving the Down syndrome-critical region, detectable by a locus specific chromosome 21 probe. The same duplication was subsequently detected by FISH in 66 of 1002 (6.6%) sperm nuclei, demonstrating paternal gonadal mosaicism. Cytogenetic studies of Peripheral blood revealed normal karyotypes in both the male. and female partners. This identification of paternal germ Cell or gonadal mosaicism suggests that analysis of sperm nuclei prior to undergoing IVF with PGD may be of value in patients with recurrent spontaneous abortions or multiple failed IVF MH - Mexico|Distrito Federal MH - Thailand MH - USA PB - CAMBRIDGE: REPRODUCTIVE HEALTHCARE LTD RP - NOT IN FILE U3 - TC 6 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Article AV - English IS - 1472-6483 UR - ISI:000226388100020 L2 - FISH;gonadal mosaicism;PGD;recurrent spontaneous abortion;spermatozoa;IN-SITU HYBRIDIZATION; PREIMPLANTATION GENETIC DIAGNOSIS; CHROMOSOME-ABNORMALITIES; DOWN-SYNDROME; MATERNAL AGE; TRISOMY-21 MOSAICISM; CELL-LINE; SPERMATOZOA; ORIGIN; MISCARRIAGE SO - Reproductive Biomedicine Online 2004 ;9(2):225-230 12524 UI - 3528 AU - Son CS AU - Kim SM AU - Kim YH AU - Kim SI AU - Kim YT AU - Yoon KH AU - Choi IH AU - Lopez HC AD - Silla Univ, Dept Photon, Pusan 617736, South KoreaKIST, Semicond Devices Lab, Seoul 136791, South KoreaYonsei Univ, Dept Ceram Engn, Seoul 120749, South KoreaKorea Univ, Dept Mat Sci & Engn, Seoul 136701, South KoreaInst Mexicano Petr, Mexico City, DF, MexicoKim, YH, Silla Univ, Dept Photon, Pusan 617736, South Korea TI - Deposition-temperature dependence of ZnO/Si grown by pulsed laser deposition AB - We have investigated structural and optical properties of ZnO films deposited on (100) Si substrates at various deposition temperatures by pulsed laser deposition. All the ZnO films show columnar structure due to the growth behavior of ZnO; the (0001) plane has the fastest growth rate, but on increasing the deposition temperature the film texture varies from c-axis orientation normal to substrate surface to random orientation. This tendency can be explained by the negative activation energy evaluated from growth rate as a function of inverse deposition temperature, which implies that ZnO films are grown in a, surface-kinetics-limited regime. FWHM of the UV-emission peak does not change at various deposition temperatures, and its mean value is about 115 meV. In contrast to FWHM, the intensity of UV emission drastically increases with increasing deposition temperature, due to the reduction of grain-boundary recombination effect MH - Mexico|Distrito Federal MH - South Korea PB - SEOUL: KOREAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0374-4884 UR - ISI:000226119400049 L2 - ZnO thin films;pulsed laser deposition;columnar structure;photoluminescence;OXIDE THIN-FILMS; CHEMICAL-VAPOR-DEPOSITION; ORIENTATION; SI SO - Journal of the Korean Physical Society 2004 ;45():S685-S688 12525 UI - 4070 AU - Son CS AU - Kim S AU - Kim YH AU - Han IK AU - Kim YT AU - Wakahara A AU - Choi IH AU - Lopez HC AD - Silla Univ, Dept Photon, Pusan 617736, South KoreaKorea Inst Sci & Technol, Semicond Devices Lab, Seoul 136791, South KoreaToyohashi Univ Technol, Dept Elect & Elect Engn, Toyohashi, Aichi 4418580, JapanKorea Univ, Dept Mat Sci & Engn, Seoul 136701, South KoreaInst Mexicano Petr, Mexico City, DF, MexicoSon, CS, Silla Univ, Dept Photon, Pusan 617736, South Korea TI - Photoluminescence of Er-implanted GaN AB - Visible green emission has been observed from Er(Erbium)-doped GaN epilayers. Various doses of Er ions were implanted in GaN epilayers by using ion implantation. The optical properties of Er-doped GaN were analyzed by using photoluminescence (PL). Sharp emission lines due to inner 4f shell transitions for Er3+ were observed in the PL spectrum of Er-implanted GaN. The emission spectrum consisted of two narrow green lines, 537 and 558 nm. The green emission lines were identified as Er3+ transitions from the H-5(11/2) and the S-4(3/2) levels to the I-4(15/2) ground state. The stronger peaks in the 5 x 10(14) cm(-2) Sample, together with the relatively higher intensity of the Er3+ luminescence in the lower doped sample, indicate that some damage remains in the 1 x 10(15) cm(-2) sample MH - Japan MH - Mexico|Distrito Federal MH - South Korea PB - SEOUL: KOREAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0374-4884 UR - ISI:000224537900030 L2 - Er;GaN;implantation;photoluminescence;LIGHT-EMITTING-DIODES; DOPED GAN; ELECTROLUMINESCENCE; EMISSION; LAYER; FILMS; SI; EU SO - Journal of the Korean Physical Society 2004 ;45(4):955-958 12526 UI - 6144 AU - Song S AU - Lu S AU - Zhang Y AU - Lopez-Valdivieso A AU - Fort T AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoWuhan Univ Sci & Technol, Dept Resources Engn, Wuhan, Peoples R ChinaVanderbilt Univ, Dept Chem Engn, Nashville, TN 37235, USASong, S, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Aggregation rate of fine particles in turbulent flows AB - An aggregation rate equation for fine particle suspensions in a turbulent flow has been derived in this study on the basis of the Tchen equation and a Gaussian probability distribution of particle-particle relative velocity, in which aggregation rate was correlated with a repulsive potential energy barrier. In the derivation, a capture efficiency term has been presented to estimate the correlation quantitatively. It has been found that capture efficiency depends on an initial aggregation rate constant, which can be represented by the slope of an E (aggregation degree) versus t (aggregation time) curve in a fine particle suspension at t --> 0. Accordingly, capture efficiency could be experimentally determined through an aggregation kinetics test. In this work, this determination was tested with fine quartz and rhodochrosite suspensions in turbulent flows, and the results were compared with those obtained by computations based on the aggregation rate equation MH - Mexico|San Luis Potosi MH - Peoples R China MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0193-2691 UR - ISI:000189156100009 L2 - aggregation rate;potential energy barrier;fine particles;turbulent flows;KINETICS SO - Journal of Dispersion Science and Technology 2004 ;25(1):67-74 12527 UI - 6145 AU - Song S AU - Zhang Y AU - Wu K AU - Lopez-Valdivieso A AU - Lu S AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoWuhan Univ Sci & Technol, Dept Resources Engn, Wuhan, Peoples R ChinaUniv Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R ChinaSong, S, Univ Autonoma San Luis Potosi, Inst Met, Av Sierra Leona 550, San Luis Potosi 78210, Mexico TI - Flotation of coal fines as hydrophobic flocs for ash rejection AB - The flotation of coal fines in the form of hydrophobic flocs, which is termed floc-flotation, for rejecting fine mineral matters from coal slimes has been studied in this work. This process consists of dispersion, selective hydrophobic flocculation of fine organic matters, and flotation of the fines as flocs. This study was performed on two coal slimes from China, namely Taixi anthracite and Tongshan coking coal. The experimental results have shown that floc-flotation not only strongly increased the combustible recovery, but also greatly lowered the ash remaining in cleaned coals, compared with conventional flotation in the same reagent additions. This effect closely correlated with the size of flocculated organic matter. The larger were the flocs, the stronger the effect was. Also, it was found that flocculated coal fines had a much higher flotation rate than dispersed fines. In addition, the main parameters of the floc-flotation process, namely nonpolar oil addition and slurry conditioning in the hydrophobic flocculation step were experimentally studied MH - Mexico|San Luis Potosi MH - Peoples R China PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0193-2691 UR - ISI:000189156100010 L2 - coal fines;hydrophobic flocculation;froth flotation;fine particle processing;FLOCCULATION SO - Journal of Dispersion Science and Technology 2004 ;25(1):75-81 12528 UI - 5648 AU - Sorhaindo A AU - Becker D AU - Fletcher H AU - Garcia S AU - Mitchell S AD - Reg Off Latin Amer & Caribbean, Populat Council, Mexico City 04000, DF, MexicoUniv Hosp W Indies, Kingston, JamaicaGarcia, S, Reg Off Latin Amer & Caribbean, Populat Council, Panzacola 62,Interior 102, Mexico City 04000, DF, Mexico TI - Exploring knowledge and attitudes about emergency contraceptive pills among university students in Jamaica - A qualitative approach AB - Emergency contraceptive pills (ECPs) are an important option for university students who may be at high risk for unplanned pregnancies. In the Caribbean, little research has been carried out on university student's knowledge and opinions of this method. This study uses qualitative methodology to explore knowledge and opinions on ECPs among university students attending The University of the West Indies (UWI) Mona campus. We conducted eight focus groups (n = 71) with female and male university students at The University of the West Indies, Kingston, Jamaica, in March 2000. The group discussions lasted approximately two hours. We tape-recorded discussions and then transcribed and analyzed them by coding responses according to themes. General knowledge of ECPs was high, but students lacked specific information about the method such as its time frame and its mechanism of action. Most students supported the method, especially after learning correct information. However several students were concerned about its side effects and the potential for abuse or irresponsible use by young adults. Although the university students in this study lacked detailed information about ECPs, their opinion toward the method was favourable. We suggest further research to investigate the prevalence of misinformation about the method among other groups of Jamaicans MH - Jamaica MH - Mexico|Distrito Federal PB - KINGSTON: UNIV WEST INDIES FACULTY MEDICAL SCIENCES RP - NOT IN FILE U3 - TC 0 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0043-3144 UR - ISI:000220896300009 L2 - MEXICO-CITY; PROVIDERS; BEHAVIOR; ACCESS SO - West Indian Medical Journal 2004 ;53(1):33-38 12529 UI - 4562 AU - Soria-Mercado IE AU - Jensen PR AU - Fenical W AU - Kassel S AU - Golen J AD - Univ Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, MexicoUniv Calif San Diego, Scripps Inst Oceanog, Ctr Marine Biotechnol & Biomed, La Jolla, CA 92093, USAUniv Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USAVillanova Univ, Dept Chem, Villanova, PA 19085, USAUniv Massachusetts, Dept Chem & Biochem, N Dartmouth, MA 02747, USASoria-Mercado, IE, Univ Autonoma Baja California, Fac Ciencias Marinas, Km 103 Carretera Tijuana Ensenada, Ensenada 22800, Baja California, Mexico TI - 3,4a-Dichloro-10a-(3-chloro-6-hydroxy-2,2,6-trimethylcyclohexylmethyl)-6 ,8-dihydroxy-2,2,7-trimethyl-3,4,4a,10a-tetrahydro-2H-benzo[g]chromene-5 ,10-dione AB - The title microbial antibiotic, C26H33Cl3O6, is an unusual trichlorinated dihydroquinone with cyclized prenyl and geranyl terpene substitution. The crystal structure provides an unambiguous assignment for this compound including its absolute stereochemistry, and shows the favored configuration of the chlorocyclohexane substituent MH - Mexico|Baja California MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 1600-5368 UR - ISI:000223624500129 L2 - ANTIBIOTICS NAPYRADIOMYCINS; STREPTOMYCES SO - Acta Crystallographica Section E-Structure Reports Online 2004 ;60():O1627-O1629 12530 UI - 4033 AU - Soriano EV AU - Garduno ML AU - Tellez G AU - Rosas PF AU - Suarez-Guemes F AU - Blackall PJ AD - Univ Autonoma Estado Mexico, Fac Med Vet & Zootecn, Ctr Invest & Estudios Avanzados Salud Anim, Toluca 50000, MexicoUniv Arkansas, Ctr Excellence Poultry Sci, Div Agr, Fayetteville, AR 72701, USAUniv Nacl Autonoma Mexico, Fac Med Vet & Zootecn, Dept Microbiol & Immunol, Mexico City 04510, DF, MexicoDept Primary Ind & Fisheries Queensland, Agcy Food & Fibre Sci, Yeerongpilly, Qld 4105, AustraliaSoriano, EV, Univ Autonoma Estado Mexico, Fac Med Vet & Zootecn, Ctr Invest & Estudios Avanzados Salud Anim, Toluca 50000, Mexico TI - Cross-protection study of the nine serovars of Haemophilus paragallinarum in the Kume haemagglutinin scheme AB - The cross-protection and haemagglutination-inhibition antibodies present in chickens vaccinated with one of the nine currently recognized Kume haemagglutinin serovars of Haemophilus paragallinarum were investigated. The results confirmed the widely accepted dogma that serogroups A, B, and C represent three distinct immunovars. Within Kume serogroup A, there was generally good cross-protection among all four serovars. However, within Kume serogroup C, there was evidence of a reduced level of cross-protection between some of the four serovars. The haemagglutination-inhibition antibody levels generally showed the same trend as with the cross-protection results. This study suggests that some apparent field failures of infectious coryza vaccines may be due to a lack of cross-protection between the vaccine strains and the field strains. Our results will help guide the selection of strains for inclusion in infectious coryza vaccines MH - Australia MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0307-9457 UR - ISI:000224820900006 L2 - HEMOPHILUS-PARAGALLINARUM; INFECTIOUS CORYZA; SEROLOGICAL CLASSIFICATION; B STRAINS; VACCINES; EFFICACY; CHICKENS; CHALLENGE; PROPOSAL; ANTIGEN SO - Avian Pathology 2004 ;33(5):506-511 12531 UI - 1968 AU - Soriano VE AU - Longinos GM AU - Fernandez RP AU - Velasquez QE AU - Ciprian CA AU - Salazar-Garcia F AU - Blackall PJ AD - Univ Autonoma Estado Mexico, Fac Med Vet & Zootecnia, Ctr Invest & Estudios Avanzados Salud Anim, Toluca 50000, MexicoUniv Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Cuautitlan 54704, MexicoQueensland Dept Primary Ind, Anim Res Inst, Agcy Food & Fibre Sci, Yeerongpilly, Qld 4105, AustraliaSoriano, VE, Univ Autonoma Estado Mexico, Fac Med Vet & Zootecnia, Ctr Invest & Estudios Avanzados Salud Anim, Inst Literario 100,Col Centro, Toluca 50000, Mexico TI - Virulence of the nine serovar reference strains of Haemophilus paragallinarum AB - The virulence of the reference strains of the nine currently recognized Kume serovars of Haemophihis paragallinarum was investigated. The capacity of the H. paragallinarum strains to cause the typical clinical signs Of Lipper respiratory tract disease associated with infectious coryza in unvaccinated, nasal-challenged chickens was assessed. Differences in virulence were assessed by means of a standardized scoring system for clinical signs. All nine strains were pathogenic to chickens, producing typical clinical signs of infectious coryza. The highest clinical signs score was obtained for serovar C-1 (1.72), while the lowest clinical signs score was obtained for serovar C-4 (0.32). Our results indicate that virulence differences exist among the serovars of H.paragallinarum MH - Australia MH - Mexico|Estado De Mexico PB - ATHENS: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 3 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000229917300017 L2 - Haemophilus paragallinarum;infectious coryza;serovars;pathogenicity;virulence;KUME HEMAGGLUTININ SCHEME; SEROLOGICAL CLASSIFICATION; HEMOPHILUS-PARAGALLINARUM; PROPOSAL SO - Avian Diseases 2004 ;48(4):886-889 12532 UI - 1969 AU - Soriano VE AU - Tellez G AU - Hargis BM AU - Newberry L AU - Salgado-Miranda C AU - Vazquez JC AD - UAEM, CIESA, FMVZ, Toluca 50000, MexicoUniv Arkansas, Ctr Excellence Poultry Sci, Div Agr, John Kirkpatrick Skeeles Poultry Hlth Res Lab, Fayetteville, AR 72701, USASoriano, VE, UAEM, CIESA, FMVZ, Inst Literario 100,Col Centro, Toluca 50000, Mexico TI - Typing of Haemophilus paragallinarum strains by using enterobacterial repetitive intergenic consensus-based polymerase chain reaction AB - The enterobacterial repetitive intergenic consensus polymerase chain reaction (ERIC-PCR) technique was used for fingerprinting of reference strains and Mexican isolates of Haemophilus paragallinarum. A total of nine ERIC patterns were given by the nine serovar reference strains of this bacteria. Two Modesto (C-2) reference strains from different sources showed the same ERIC pattern. Seventeen ERIC patterns were obtained among 29 Mexican isolates included in the study, belonging to serovars prevalent in Mexico (A-1, A-2, B-1, and C-2). Obtained results indicate that the ERIC-PCR technique could be used as a molecular laboratory tool for subryping of H. paragallinarum MH - Mexico|Estado De Mexico MH - USA PB - ATHENS: AMER ASSOC AVIAN PATHOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0005-2086 UR - ISI:000229917300018 L2 - Haemophilus paragallinarum;ERIC-PCR;fingerprinting;typing;RESTRICTION ENDONUCLEASE ANALYSIS; KUME HEMAGGLUTININ SCHEME; INFECTIOUS CORYZA; CHROMOSOMAL DNA; PCR; SEQUENCES; PARASUIS SO - Avian Diseases 2004 ;48(4):890-895 12533 UI - 4284 AU - Sorzana COS AU - de la Fraga LG AU - Clackdoyle R AU - Carazo JM AD - CSIC, Natl Biotechnol Ctr, Biocomp Unit, E-28049 Madrid, SpainIPN, CINVESTAV, Dept Elect Engn, Div Comp Sci, Mexico City 07300, DF, MexicoUniv Utah, Dept Radiol, Med Imaging Res Lab, Salt Lake City, UT 84108, USACarazo, JM, CSIC, Natl Biotechnol Ctr, Biocomp Unit, Campus Univ Autonoma, E-28049 Madrid, Spain TI - Normalizing projection images: a study of image normalizing procedures for single particle three-dimensional electron microscopy AB - In the process of three-dimensional reconstruction of single particle biological macromolecules several hundreds, or thousands, of projection images are taken from tens or hundreds of independently digitized micrographs. These different micrographs show differences in the background grey level and particle contrast and, therefore, have to be normalized by scaling their pixel values before entering the reconstruction process. In this work several normalization procedures are studied using a statistical comparison framework. We finally show that the use of the different normalization methods affects the reconstruction quality, providing guidance on the choice of normalization procedures. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Microscopy U5 - J;Article AV - English IS - 0304-3991 UR - ISI:000224046100008 L2 - single particles;electron microscopy;image normalization;image formation model;computed tomography;3D RECONSTRUCTION; RESOLUTION; MACROMOLECULES; CRYOMICROSCOPY; PROTEINS; CTF SO - Ultramicroscopy 2004 ;101(2-4):129-138 12534 UI - 3724 AU - Sossa H AU - Flusser J AD - IPN, Ctr Invest Computac, Mexico City 07700, DF, Mexico. Acad Sci Czech Republ, Inst Informat Theory & Automat, Prague 18208 8, Czech Republic TI - Refined method for the fast and exact computation of moment invariants AB - Geometric moments have been proven to be a very efficient tool for description and recognition of binary shapes. Numerous methods for effective calculation of image moments have been presented up to now. Recently, Sossa, Yanez and Diaz [Pattern Recognition, 34(2):271-276, 2001] proposed a new algorithm based on a morphologic decomposition of the image into a set of closed disks. Their algorithm yields approximative results. In this paper we propose a refinement of their method that performs as fast as the original one but gives exact results MH - Czech Republic MH - Mexico|Distrito Federal T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBE01 AV - English IS - 0302-9743 UR - ISI:000225085900061 SO - 2004 ;():487-494 12535 UI - 4260 AU - Soto-Mardones L AU - Pares-Sierra A AU - Durazo R AD - Univ Bio Bio, Concepcion, ChileUniv Autonoma Baja California, Ensenada, Baja California, MexicoCtr Invest Cient & Educ Super Ensenada, Ensenada, Baja California, MexicoSoto-Mardones, L, Univ Bio Bio, Concepcion, Chile TI - Ekman modulation of the sea-surface temperature on the Eastern South Pacific AB - Nine years of data (1992-2000) were used to study the evolution of the sea-surface temperature (SST) over the eastern south Pacific. Our analysis shows that the variability in the SST on the interannual scale is attributed mainly to the equatorial El Nino-La Nina events while cooling, associated with the wind-Ekman drift, is an important component of the annual cycle. The anomalies at the interannual scale show up as a front that parallels the coast. At the seasonal scale, anomalous warming and cooling of coastal waters is strongly altered by the local effect of the wind-driven Ekman transport. This latter effect is especially significant along the Peruvian and Northern Chilean coast where wind induced upwelling and cooling is out-of-phase with other important annual forcings (i.e radiation and annual Kelvin waves). These local wind effects show up in the time-latitude plots as a thinning of the warm-water bands along the Peruvian coast (similar to10degreesS y 17degreesS) and a thickening of the bands further south (similar to18degreesS y 22degreesS). Three anomalous events that stand out clearly at the interannual scale are El Nino 92-93, La Nina 96 and El Nino 97-98. Their individual evolutions over time and along the coast are very different. Though the least intense of the three, the 92-93 event had the longest duration. The 96 event was the shortest in duration and its strongest anomaly occurred around the Peruvian coast, similar to the warm event of 92-93. The strongest event for the period occurred in 97-98, its warm anomaly showing strongly along the whole latitudinal extent of the study area. Contrary to what occurs at the seasonal scale, the increase on east/west Ekman transport on the interannual scale seems to be in phase with other relevant cooling and warming mechanisms. The interannual Ekman anomalous transports are at their maximum near the Peruvian-northern Chilean coast; however, they do not seem to alter the SST in a significant way. A similar situation has been described for sea-level data in the California Current System, i.e. interannual variability being associated mostly with variability of equatorial origin while seasonal variability is associated to both wind-forced local variability and remotely forced variability. (C) 2004 Elsevier Ltd. All rights reserved MH - Chile MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700004 L2 - INTERANNUAL VARIABILITY; EL-NINO; SYSTEM; MODEL; CHILE; PERU SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):551-561 12536 UI - 4267 AU - Soto-Mardones L AU - Pares-Sierra A AU - Garcia J AU - Durazo R AU - Hormazabal S AD - Univ Bio Bio, Concepcion, ChileUniv Autonoma Baja California, Ensenada, Baja California, MexicoCtr Invest Cientifica & Educ Super Ensenada, Ensenada, Baja California, MexicoUniv Copenhagen, Niels Bohr Inst Astron Phys & Geophys, Danish Ctr Earth Syst Sci, DK-2100 Copenhagen, DenmarkSoto-Mardones, L, Univ Bio Bio, Concepcion, Chile TI - Analysis of the mesoscale structure in the IMECOCAL region (off Baja California) from hydrographic, ADCP and altimetry data AB - We present geostrophic velocities obtained using hydrographic-altimeter data and direct measurements of currents from 11 cruises offshore of Baja California from January 2000 to July 2002. The study area was dominated by meanders and eddies in geostrophic balance. Two mechanisms of eddy generation were observed; the first associated with the geometry of the coastline, and the second a product of the cooling of the California Current and the California Undercurrent from the South. There were two persistent eddies observed during the study. The first eddy was offshore of Bahia Vizcaino and had an anticyclonic circulation. Situated in the southern region, the rotation of the second eddy was dependant on which current was first to enter the transition zone along the coast. Spring was a transition period characterized by the formation of meanders. The summer brought a period of eddy generation along the coast. Autumn and winter were marked by a separation of eddies from the coast and their subsequent drift towards the west. The phase velocity of the mesoscale eddies was in accordance with the theory of the linear propagation of a Rossby wave. (C) 2004 Published by Elsevier Ltd MH - Chile MH - Denmark MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700020 L2 - COASTAL TRANSITION ZONE; CURRENT SYSTEM; SEASONAL VARIABILITY; VANCOUVER ISLAND; MEANDERS; CURRENTS; EDDIES; MODEL; CIRCULATION; EVOLUTION SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):785-798 12537 UI - 5007 AU - Soto G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - AES, EELS and XPS characterization of Ti(C, N, O) films prepared by PLD using a Ti target in N-2, CH4,O-2 and CO as reactive gases AB - Titanium-based films were grown on (1 0 0)-Si substrates by the pulsed laser deposition (PLD) method using a Ti target in reactive atmospheres. The films were grown in vacuum (Ti-film), O-2 (TiOx), N-2 (TiNx), CH4 (TiCx), CO (TiCxOy), N-2 + CH4 (TiCxNy) and CO + N-2 (TiCxNyOz). After depositions, every film is characterized in situ by Auger, electron-energy loss and Xray photoelectron (XPS) spectroscopies. For the binary compounds the stoichiometry is regulated without difficulty by gas pressure during ablation. However, for ternary and quaternary compounds there is a tendency to produce chemically inhomogeneous films. For example, the ablation of Ti in a N-2 + CH4 environment results in a TiNC:C composite. In this case, the overabundance of nitrogen influences the segregation of carbon. In the other hand, the O-2 + CH4 mixture was ineffectively to produce TiCxOy films, yielding mostly TiO2 with traces of embedded carbon. By using CO as reactive gas the TiCxOy films were completed. Also, a mixture of CO with N-2 was tested to produce quaternary TiCxNyOz compounds. Based on these results, it is recommended that better control on film stoichiometry and chemical homogeneity can be achieved by using reactive gases with predetermined C:N:O ratios. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000222497700016 L2 - TiN;TiC;TiCN;TiCO;TiCNO;pulsed laser deposition;thin films;XPS;AES;EELS;PULSED-LASER DEPOSITION; THIN-FILMS; ABLATION; GROWTH SO - Applied Surface Science 2004 ;233(1-4):115-122 12538 UI - 5311 AU - Soto G AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Spectroscopic characterization of TiCx films produced by pulsed laser deposition in CH4 environments AB - Titanium carbide (TiCx) thin films were grown on (100)-Si substrates by a pulsed laser deposition (PLD) method using a Ti target in methane gas. The films are characterized in situ by Auger (AES), electron energy loss (EELS) and X-ray photoelectron spectroscopies (XPS). It was found that the reaction between the ablated Ti species and CH4 in the plasma plume influenced the C:Ti ratio. XPS numerical fitting for the C Is transition revealed three Gaussians components. The main component, binding energy of 282.8 eV, is assigned to C making bonds with Ti, like in stoichiometric TiC. The second component, binding energy of 284.9 eV, is assigned to C-C bonds. A third component is found for films deposited at pressures higher than 25 mTorr at 286.5 eV. A post-deposition thermal treatment demonstrates that the Ti-C and C-C peaks are very stable, whereas, the third peak tends to decrease for temperatures higher than 200 degreesC. It is assumed that this last component is due to carbonyl complexes remnant in films. Finally, it can be concluded that the titanium carbide films processed by PLD is a chemically inhomogeneous material; mostly composed of sub-stoichiometric TiC and particulates of segregated carbon. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0169-4332 UR - ISI:000221968100032 L2 - titanium carbide;pulsed laser deposition;thin films;XPS;AES;EELS;REACTIVE ABLATION DEPOSITION; THIN-FILMS; TITANIUM CARBIDE; COATINGS; GROWTH SO - Applied Surface Science 2004 ;230(1-4):254-259 12539 UI - 5674 AU - Soto G AU - de la Cruz W AU - Farias MH AD - UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoSoto, G, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - XPS, AES, and EELS characterization of nitrogen-containing thin films AB - Pulsed laser deposition (PLD) appears to be a very efficient tool for material synthesis. Interstitial compounds like hydrides, carbides, and nitrides are usually produced by reactive variations of PLD. In this study, a methodical routine based in PLD is used to synthesize nitrogen-containing films by ablating pure-element targets in molecular nitrogen environments. The resulting films are analyzed in situ by X-ray photoelectron (XP), Auger-electron (AE), and electron energy loss (EEL) spectroscopies. Our methodology confirms the existence of remarkable regularities in the spectroscopic characteristics of those films. For example, the N-KVV Auger transition for nitrogen contained in d-metals is split in three main energy bands and several additional subbands. For the main bands, their relative intensities correlate with electronic populations in d-orbitals, while the subbands can be associated to energy losses of the main bands. We propose that the main bands reflect the bonding, non-bonding and anti-bonding interactions between nitrogen and partner element. By means of XPS measurements, core-level energy shifts are detected and they are relative to the amount of nitrogen incorporated in the films. In the EELS section, an association between the loss-structure of pure-elements and nitrides is presented. With few exceptions, the bulk plasmon energy in nitrides is larger than in pure-elements, indicative of an increase in the electronic density of nitrides. The peak structure of the N-KVV transition, the XP binding energies and the loss spectra are presented; this data can be of valuable assistance for the analysis of nitride formation. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Spectroscopy U5 - J;Article AV - English IS - 0368-2048 UR - ISI:000220935200005 L2 - AES;EELS;XPS;nitrides;AES peak structure;PLD;PULSED-LASER DEPOSITION; MEAN FREE PATHS; NITRIDE FILMS; TRANSITION-METALS; IN-SITU; SURFACES; ABLATION; SPECTRA; GROWTH; PHOTOELECTRONS SO - Journal of Electron Spectroscopy and Related Phenomena 2004 ;135(1):27-39 12540 UI - 5234 AU - Soto H AU - Alvarez E AU - Diaz CA AU - Topomondzo J AU - Erasme D AU - Schares L AU - Occhi L AU - Guekos G AU - Castro M AD - Ctr Invest Cientif & Educ Superior Ensenada, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoEcole Natl Super Telecommun Bretagne, CNRS, URA 820, Dept Commun, F-75634 Paris 13, FranceSwiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, SwitzerlandOpto Speed AG, CH-8803 Ruschlikon, SwitzerlandSoto, H, Ctr Invest Cientif & Educ Superior Ensenada, Div Fis Aplicada, Km 107 Carretara Tijuana Ensenada,Apartado Postal, Ensenada 22860, Baja California, Mexico TI - Design of an all-optical NOT XOR gate based on cross-polarization modulation in a semiconductor optical amplifier AB - In this work, we have discussed the physical phenomena involved in the manifestation of the cross-polarization modulation (XPolM) effect in a semiconductor optical amplifier (SOA), namely the eigenaxes modification, the structural birefringence perturbation and the polarization gain dispersion. We demonstrate that the XPolM effect can rotate the polarization-state of a CW beam by 73.5degrees when the power of a control beam changes from 0 to 300 muW. The control and CW beams are introduced into the amplifier with a linear polarization near to the unperturbed amplifier TM axis where the waveguide eigenaxes modification presented the strongest participation in the XPolM effect in the used SOA. Finally, we experimentally show Boolean NOT XOR operation with input logic signals modulated with a 2.5 Gb/s NRZ code with a pseudo-random data sequence of 2(23) - 1 length. The NOT XOR gate utilizes a single SOA as non-linear element and it needs neither an inversion stage nor an additional synchronized clock. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Baja California MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000222042500016 L2 - optoelectronic devices;semiconductor optical amplifiers;optical logic devices;optical propagation in non-linear media;optical waveguides;Boolean functions;WAVELENGTH CONVERSION; GAIN RECOVERY; BIREFRINGENCE; ROTATION; CONVERTER; DYNAMICS SO - Optics Communications 2004 ;237(1-3):121-131 12541 UI - 4854 AU - Soto V AU - Knorr K AU - Ehm L AU - Baehtz C AU - Winkler B AU - valos-Borja M AD - Univ Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCtr Invest Cient & Educ Super Ensenada, Ensenada 22800, Baja California, MexicoTech Univ Darmstadt, D-64287 Darmstadt, GermanyHASYLAB, Hamburg, GermanyUniv Frankfurt, D-60054 Frankfurt, GermanyUniv Nacl Autonoma Mexico, Ctr Ciencas Mat Condensada, Ensenada 22800, Baja California, MexicoKnorr, K, Univ Kiel, Inst Geowissensch, Olshaussenstr 40, D-24098 Kiel, Germany TI - High-pressure and high-temperature powder diffraction on molybdenum diphosphide, MoP2 AB - The isothermal compressibility and bulk thermal expansion of molybdenum diphosphide, MoP2, were measured by in-situ X-ray powder diffraction from ambient conditions to 6.8 GPa and 839 K, respectively. A small anisotropy of the compressibilities in MoP2 appears to be governed by non-bonding interactions in this layer-like material. The thermal expansion data are compared to molybdenum phosphide, MoP, which was measured to 1262 K MH - Germany MH - Mexico|Baja California PB - MUNICH: R OLDENBOURG VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 0044-2968 UR - ISI:000222754000003 L2 - molybdenum phosphides;compressibility;thermal expansion;powder diffraction structure analysis;X-ray diffraction;high pressure;high temperature;X-RAY; SINGLE-CRYSTAL; PHOSPHIDES SO - Zeitschrift fur Kristallographie 2004 ;219(6):309-313 12542 UI - 3411 AU - Soto VM AU - Hake MP AU - Boldt GE AU - Koch A AU - Grotjahn DB AU - Morales DM AD - Inst Technol Tijuana, Ctr Grad & Invest, Tijuana 22000, Baja California, MexicoSan Diego State Univ, Dept Chem, San Diego, CA 92182, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Transition metal complexes of chelating imidazolyl- and pyridylthioether ligands MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655604650 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U1411-U1411 12543 UI - 4015 AU - Souza AJ AU - Alvarez LG AU - Dickey TD AD - Proudman Oceanog Lab, Liverpool L3 5DA, Merseyside, EnglandCICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, MexicoUniv Calif, Ocean Phys Lab, Santa Barbara, CA 93117, USASouza, AJ, Proudman Oceanog Lab, 6 Brownlow St, Liverpool L3 5DA, Merseyside, England TI - Tidally induced turbulence and suspended sediment AB - Nearly continuous data collected using novel methods are utilized to advance the understanding of turbulence and suspended particulate matter (SPM) dynamics under strong tidal flow conditions. Key instrumentation includes a single acoustic current profiler that provides nearly continuous, concurrent turbulence and SPM information with respect to depth near the seafloor and within the water column. Observations show a lag of about 1 hour in turbulence production between the bottom and 12 meters above the bottom (mab), and of about 1.5 hours for SPM. Estimates of eddy viscosity show values ranging between 10(-3) and 10(-2) m(2) s(-1), with an almost constant mean value of 3.5 x 10(-3) m(2) s(-1) within the bottom 7 meters. The present observations and a previously reported theory show good agreement in both amplitude and phase for SPM and turbulence, when values of eddy viscosity ranging between 3.5 x 10(-3) (mean) and 10(-2) (maximum) are used. Our data set is valuable for evaluating, developing, and improving turbulence and SPM numerical models MH - United Kingdom MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000224876400005 L2 - GULF-OF-CALIFORNIA; REYNOLDS STRESS; COLORADO RIVER; DISSIPATION; CHANNEL; FLOW SO - Geophysical Research Letters 2004 ;31(20): 12544 UI - 4248 AU - Souza MM AU - Palomino G AU - Pereira TNS AU - Pereira MG AU - Viana AP AD - Univ Estadual Norte Fluminense, Ctr Ciencias & Tecnol Agropecuarias, Lab Melhoramento Genet Vegetal, Rio De Janeiro, BrazilUniv Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Mexico City, DF, MexicoSouza, MM, Univ Estadual Norte Fluminense, Ctr Ciencias & Tecnol Agropecuarias, Lab Melhoramento Genet Vegetal, Campus Goytacazes, Rio De Janeiro, Brazil TI - Flow cytometric analysis of genome size variation in some Passiflora species AB - Nuclear genome size variation was studied in eight taxa of Passiflora. Nuclear DNA content was estimated by flow cytometry of nuclei stained by propidium iodide. 2C DNA content ranged from 3.16-5.36 pg for diploids and 1.83 pg for tetraploid. Differences in nuclear genome size were observed among Passiflora species (pg): R suberosa 1.83, P edulis f. edulis 3.16, P. edulis f. flavicarpa (Brazil) 3.19, P. edulis f. flavicarpa (Mexico) 3.21, P. mucronata 3.40, Passiflora edmundoi 3.43, P. laurifolia 3.88, P. giberti 3.92, P. quadrangularis 5.36, the largest value being up to 192% greater than the smallest. The means of 2C DNA content were compared by the Tukey test, and the differences in genome size permitted the recognition of five taxa groups. The result was the same for the means 2C genome size (Mbp) values. The genetic parameters were studied with their respective estimators, phenotypic variance (delta(2)F), genotypic variability (PhiG), and the genotypic determination index (H-2). The genotypic determination index presented high magnitude estimates (greater than 99%) emphasizing the reliability of the results and demonstrating the efficiency of determining the DNA content in the species using only one leaf per plant. Passiflora species show great phenotypic variability and have different geographic distribution that might implicate in genetic diversity MH - Brazil MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 2 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0018-0661 UR - ISI:000224195800006 L2 - NUCLEAR-DNA CONTENT; KARYOTYPE ANALYSIS; PLANTS; ANGIOSPERMS; ALLIUM; HYBRIDIZATION; MAIZE SO - Hereditas 2004 ;141(1):31-38 12545 UI - 3742 AU - Spencer SL AU - Berryman MJ AU - Garcia JA AU - Abbott D AD - Univ Adelaide, Ctr Biomed Engn, Sch Elect & Elect Engn, Adelaide, SA 5005, AustraliaLa Salle Univ, Lab Theoret Biol, Mexico City 06140, DF, MexicoUniv Michigan, Dept Human Genet, Ann Arbor, MI 48109, USAMIT, Cambridge, MA 02139, USASpencer, SL, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, USA TI - An ordinary differential equation model for the multistep transformation to cancer AB - Cancer is viewed as a multistep process whereby a normal cell is transformed into a cancer cell through the acquisition of mutations. We reduce the complexities of cancer progression to a simple set of underlying rules that govern the transformation of normal cells to malignant cells. In doing so, we derive an ordinary differential equation model that explores how the balance of angiogenesis, cell death rates, genetic instability, and replication rates give rise to different kinetics in the development of cancer. The key predictions of the model are that cancer develops fastest through a particular ordering of mutations and that mutations in genes that maintain genomic integrity would be the most deleterious type of mutations to inherit. In addition, we perform a sensitivity analysis on the parameters included in the model to determine the probable contribution of each. This paper presents a novel approach to viewing the genetic basis of cancer from a systems biology perspective and provides the groundwork for other models that can be directly tied to clinical and molecular data. (C) 2004 Elsevier Ltd. All rights reserved MH - Australia MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 7 U4 - Biology;Mathematical & Computational Biology U5 - J;Article AV - English IS - 0022-5193 UR - ISI:000225377400005 L2 - cancer;oncogenesis;tumor progression;genetic instability;hallmarks of cancer;MUTATION-RATE; COLORECTAL-CANCER; BREAST-CANCER; CLINICAL-DATA; TUMORS; CARCINOGENESIS; TUMORIGENESIS; INSTABILITY; GROWTH; RATES SO - Journal of Theoretical Biology 2004 ;231(4):515-524 12546 UI - 5818 AU - Spirin VV AU - Sokolov IA AU - No K AD - CICESE, Div Fis Aplicada, Ensenada 22860, Baja California, MexicoAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaKorea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South KoreaSpirin, VV, CICESE, Div Fis Aplicada, Apdo Postal 2732, Ensenada 22860, Baja California, Mexico TI - Determination of piezoelectric coefficients of ferroelectric thin films using GaAs : Cr adaptive interferometer AB - We report on simple interferometric technique for the measurement of piezoelectric coefficients of thin films using GaAs:Cr adaptive photodetectors in the geometry of modified Mach-Zehnder interferometer. The technique needs no special vibroinsulation and automatically adjusts and keeps the operation point of the interferometer. Strong hysteresis effects with a slightly asymmetric form of the hysteresis loop were observed at the dependence of d(33) coefficients of the Pb(Zr, Ti)O-3 (PZT) thin film versus DC electric field. The obtained values of d33 coefficients are in agreement with known data. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - Russia MH - South Korea PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 0030-3992 UR - ISI:000220578900013 L2 - adaptive photodetectors;piezoelectric coefficient;PZT thin films;OPTICAL 2ND-HARMONIC GENERATION; GRATINGS SO - Optics and Laser Technology 2004 ;36(4):337-340 12547 UI - 6219 AU - Spirin VV AU - Mendieta FJ AU - Miridonov SV AU - Shlyagin MG AU - Chtcherbakov AA AU - Swart PL AD - CICESE, Div Fis Aplicada, Ensenada, Baja California, MexicoRand Afrikaans Univ, Fac Engn, ZA-2092 Johannesburg, South AfricaSpirin, VV, CICESE, Div Fis Aplicada, Km 107 Carr Tijuana, Ensenada, Baja California, Mexico TI - Localization of a loss-inducing perturbation with variable accuracy along a test fiber using transmission-reflection analysis AB - We report on the detection of a loss-inducing perturbation With variable localization accuracy along a test fiber based on the analysis of transmitted and reflected powers of an unmodulated continuous-wave light source. The required accuracy of localization is provided by suitable distribution of the differential reflectivity along the fiber. The localization accuracy for a strong disturbance has been estimated as +/- 1.0 m along the 3.939-km single-mode test fiber and as +/- 5.0 mm along a designated 10-cm fiber part for both strong and weak perturbations MH - Mexico|Baja California MH - South Africa PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000189020000073 L2 - Bragg grating;distributed fiber optical loss sensor;Rayleigh scattering;RAYLEIGH BACKSCATTERING SO - Ieee Photonics Technology Letters 2004 ;16(2):569-571 12548 UI - 5042 AU - Srinivas TR AU - Herrera-Acosta J AU - Feig DI AU - Kang DH AU - Segal MS AU - Johnson RJ AD - Univ Florida, Div Nephrol Hypertens & Transplantat, Gainesville, FL 32610, USAInst Nacl Cardiol Ignacio Chavez, Dept Nefrol, Mexico City, DF, MexicoBaylor Coll Med, Dept Pediat, Renal Sect, Houston, TX 77030, USAEwha Womans Univ, Coll Med, Div Nephrol, Res Ctr, Seoul, South KoreaSrinivas, TR, Univ Florida, Div Nephrol Hypertens & Transplantat, 1600 SW Archer Rd,Room CG-98, Gainesville, FL 32610 USA TI - Diuretic-induced hyperuricernia does not decrease cardiovascular risk MH - USA MH - Mexico|Distrito Federal MH - South Korea PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 3 U4 - Peripheral Vascular Disease U5 - J;Letter AV - English IS - 0263-6352 UR - ISI:000222408100027 L2 - SERUM URIC-ACID; SMOOTH-MUSCLE-CELLS; HYPERTENSIVE PATIENTS; BLOOD-PRESSURE; RENAL-DISEASE; OUTCOMES; ELEVATION; PROGRAM; OXIDASE; WEIGHT SO - Journal of Hypertension 2004 ;22(7):1415-1417 12549 UI - 5402 AU - Srivastava RK AU - Singh RK AU - Verma SP AD - Banaras Hindu Univ, Dept Geol, Igneous Petrol Lab, Varanasi 221005, Uttar Pradesh, IndiaUNAM, CIE, Temixco 62580, MexicoSrivastava, RK, Banaras Hindu Univ, Dept Geol, Igneous Petrol Lab, Varanasi 221005, Uttar Pradesh, India TI - Neoarchaean mafic volcanic rocks from the southern Bastar greenstone belt, Central India: petrological and tectonic significance AB - The Archaean southern Bastar Craton of India is an integral part of the Singhbhum protocontinent and includes a suite of geochemically diverse Neoarchaean mafic volcanics that occur as well-exposed extrusive masses capping hills of granite gneiss. All mafic volcanics have undergone greenschist facies metamorphic conditions, but most have preserved original igneous textures. Geochemical data indicate the mafic volcanic rocks can be divided into three distinct varieties; sub-alkaline basalt (SAB), basaltic andesite (BA), and boninite (BON). We interpret the geochemical data to indicate that these volcanics are genetically related through fractionation of BON to BA and SAB. Regional geology, metamorphism, distinctive sedimentary records, and small negative Nb anomalies in the malic volcanic geochemistry suggest they were deposited in a stable continental rift environment. We interpret the geochemical characteristics of the mafic volcanics to most likely reflect variations in source characteristics, together with minor crustal contamination, rather than the process of volcanic-arc magmatism. Geochemical modelling suggest that the primary BON composition is consistent with about 15-20% batch-melting of a mantle source. BA and SAB represent fractional crystallisation of olivine from a high-Mg basaltic or boninitic magma. Compatible and incompatible trace element modelling suggests that all three rock types probably originated from a lherzolite mantle source. (C) 2004 Elsevier B.V. All rights reserved MH - India MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0301-9268 UR - ISI:000221627200007 L2 - Archaean;Bastar Craton;mafic volcanics;boninites;geochemical modelling;BONINITE-LIKE ROCKS; CONTINENTAL-CRUST; GEOCHEMICAL CHARACTERISTICS; THERMODYNAMIC MODELS; ELEMENT EVIDENCE; RIDGE BASALTS; UPPER MANTLE; PETROGENESIS; EVOLUTION; MAGMATISM SO - Precambrian Research 2004 ;131(3-4):305-322 12550 UI - 3868 AU - St'astny F AU - Lisy V AU - Mares V AU - Lisa R AU - Balcar VJ AU - Santamaria A AD - Univ Sydney, Inst Biomed Res, Discipline Anat & Histol, Sydney, NSW 2006, AustraliaCharles Univ, Prague Psychiat Ctr, Prague, Czech RepublicCharles Univ, Fac Med 3, Prague, Czech RepublicAcad Sci Czech Republ, Inst Physiol, Prague, Czech RepublicUniv Sydney, Sch Med Sci, Sydney, NSW 2006, AustraliaNatl Inst Neurol & Neurosurg, Dept Neurochem, Mexico City, DF, MexicoBalcar, VJ, Univ Sydney, Inst Biomed Res, Discipline Anat & Histol, Anderson Stuart Bldg F13, Sydney, NSW 2006, Australia TI - Quinolinic acid induces NMDA receptor-mediated lipid peroxidation in rat brain microvessels AB - Quinolinic acid increased the generation of lipid peroxidation products by isolated rat brain microvessels in vitro. The effect was inhibited both by a specific NMDA receptor antagonist D-2-amino-5-phosphonovaleric acid and by reduced glutathione (GSH). Furthermore, quinolinic acid displaced specific binding of [H-3]-L-glutamate by cerebral microvessel membranes, particularly in the presence of NMDA receptor co-agonist (glycine) and modulator (spermidine). We conclude that quinolinic acid can cause potentially cytotoxic lipid peroxidation in brain microvessels via an NMDA receptor mediated mechanism MH - Australia MH - Czech Republic MH - Mexico|Distrito Federal PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 1351-0002 UR - ISI:000225132200007 L2 - IONOTROPIC GLUTAMATE RECEPTORS; IN-VIVO; OXIDATIVE STRESS; NERVOUS-SYSTEM; NEUROTOXICITY; SUBUNITS; ENDOTHELIUM; INHIBITION; EXPRESSION; OXYGENASE SO - Redox Report 2004 ;9(4):229-233 12551 UI - 6046 AU - Stadelmann B AU - Herrera LG AU - rroyo-Cabrales J AU - Flores-Martinez JJ AU - May BP AU - Ruedi M AD - Nat Hist Museum, CH-1211 Geneva 6, SwitzerlandUniv Geneva, Mol Systemat Grp, Dept Zool & Anim Biol, CH-1224 Chene Bougeries, SwitzerlandNatl Autonomous Univ Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Anim Sci, Genom Variat Lab, Davis, CA 95616, USAINAH, Lab Arqueozool, Mexico City 06060, DF, MexicoStadelmann, B, Nat Hist Museum, POB 6434, CH-1211 Geneva 6, Switzerland TI - Molecular systematics of the fishing bat Myotis (Pizonyx) vivesi AB - Phylogenetic reconstructions based on molecular data have shown recurrent morphological convergence during evolution of the species-rich genus Myotis. Species or groups of species with similar feeding strategies have evolved independently several times to produce remarkable similarities in external morphology. In this context, we investigated the contentious phylogenetic position of 1 of the 2 piscivorous bat species, Myotis vivesi, which was not included in previous molecular studies. This bat, endemic to the coasts and islands of the Gulf of California, Mexico, was long classified in its own genus, Pizonyx, because of its distinctive morphology. To reconstruct its phylogenetic origins relative to other Myotis, we sequenced the mitochondrial cytochrome-b gene of 2 M. vivesi and related vespertilionids. These outgroups included Pipistrellus subflavus, a member of the subgenus Perimyotis, sometimes classified within the genus Myotis. Unexpectedly, all reconstructions placed M. vivesi within a strongly supported clade including all other typical neotropical and Nearctic Myotis. This molecular phylogeny supports an endemic radiation of New World Myotis. Other Myotis species with similar adaptations to gaffing prey from the water surface present no close phylogenetic relationships with M. vivesi, indicating that such adaptations are convergences. On the other hand, P. subflavus is genetically as distant from the genus Myotis as from other Pipistrellus species, suggesting that generic rank to Perimyotis is warranted MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 9 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000220140300021 L2 - adaptive radiation;Chiroptera;cytochrome b;mitochondrial DNA;Myotis;Perimyotis;phylogeny;piscivory;pisonyx;COMPLETE MITOCHONDRIAL GENOMES; CYTOCHROME-B SEQUENCE; MAXIMUM-LIKELIHOOD; GENUS MYOTIS; BULLDOG BAT; CHIROPTERA; EVOLUTION; DNA; VESPERTILIONIDAE; PHYLOGENY SO - Journal of Mammalogy 2004 ;85(1):133-139 12552 UI - 4718 AU - Starkov K AU - Chen GR AD - City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R ChinaIPN, CITEDI, Tijuana, BC, MexicoChen, GR, City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China TI - Chaotification of polynomial continuous-time systems and rational normal forms AB - In this paper we study the chaotification problem of polynomial continuous-time systems in a semiglobal setting. Our results are based on the computation of rational normal forms and time-delay anticontroller design. As examples, the Rossler system, some Sprott systems and the Lorenz system are considered. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Mathematics, Interdisciplinary Applications;Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0960-0779 UR - ISI:000223243700011 L2 - DYNAMICAL-SYSTEMS; FEEDBACK SO - Chaos Solitons & Fractals 2004 ;22(4):849-856 12553 UI - 3668 AU - Starkov KE AD - IPN, CITEDI, Tijuana 22510, Baja California, MexicoStarkov, KE, IPN, CITEDI, 2498 Roll Dr 757, San Diego, CA 92154, USA TI - Localization of periodic orbits of autonomous systems based on high-order extremum conditions AB - This paper gives localization and nonexistence conditions of periodic orbits in some subsets of the state space. Mainly, our approach is based on high-order extremum conditions, on high-order tangency conditions of a nonsingular solution of a polynomial system with an algebraic surface, and on some ideas related to algebraically-dependent polynomials. Examples of the localization analysis of periodic orbits are presented including the Blasius equations, the generalized mass action (GMA) system, and the mathematical model of the chemical reaction with autocatalytic step MH - Mexico|Baja California MH - USA PB - SYLVANIA: HINDAWI PUBLISHING CORPORATION RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 1024-123X UR - ISI:000225702400006 L2 - INVARIANT ALGEBRAIC-SURFACES; DYNAMICAL-SYSTEMS SO - Mathematical Problems in Engineering 2004 ;2004(3):277-290 12554 UI - 6704 AU - Stasinska G AU - Grafener G AU - Pena M AU - Hamann WR AU - Koesterke L AU - Szczerba R AD - Observ Meudon, LUTH, F-92195 Meudon, FranceUniv Potsdam, Inst Phys, D-14469 Potsdam, GermanyUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoNASA, Astron & Solar Phys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771, USANicholas Copernicus Astron Ctr, PL-87100 Torun, PolandStasinska, G, Observ Meudon, LUTH, 5 Pl Jules Janssen, F-92195 Meudon, France TI - Comprehensive modelling of the planetary nebula LMC-SMP61 and its [WC]-type central star AB - We present a comprehensive study of the Magellanic Cloud planetary nebula SMP 61 and of its nucleus, a Wolf-Rayet type star classified [WC 5-6]. The observational material consists of HST STIS spectroscopy and imaging, together with optical and UV spectroscopic data collected from the literature and infrared fluxes measured by IRAS. We have performed a detailed spectral analysis of the central star, using the Potsdam code for expanding atmospheres in non-LTE. For the central star we determine the following parameters: L-star = 10(3.96) L-., R-star = 0.42 R-., T-star = 87.5 kK, (M) over dot = 10(-6.12) M-. yr(-1), v(infinity) = 1400 km s(-1), and a clumping factor of D = 4. The elemental abundances by mass are X-He = 0.45, X-C = 0.52, X-N < 5 x 10(-5), X-O = 0.03, and X-Fe < 1 x 10(-4). The fluxes from the model stellar atmosphere were used to compute photoionization models of the nebula. All the available observations, within their error bars, were used to constrain these models. We find that the ionizing fluxes predicted by the stellar model are consistent with the fluxes needed by the photoionization model to reproduce the nebular emission, within the error margins. However, there are indications that the stellar model overestimates the number and hardness of Lyman continuum photons. The photoionization models imply a clumped density structure of the nebular material. The observed C III] lambda1909/C II lambda4267 line ratio implies the existence of carbon-rich clumps in the nebula. Such clumps are likely produced by stellar wind ejecta, possibly mixed with the nebular material. We discuss our results with regard to the stellar and nebular post-AGB evolution. The observed Fe-deficiency for the central star indicates that the material which is now visible on the stellar surface has been exposed to s-process nucleosynthesis during previous thermal pulses. The absence of nitrogen allows us to set an upper limit to the remaining H-envelope mass after a possible AGB final thermal pulse. Finally, we infer from the total amount of carbon detected in the nebula that the strong [WC] mass-loss may have been active only for a limited period during the post-AGB evolution MH - France MH - Germany MH - Mexico|Distrito Federal MH - Poland MH - USA PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000187356300037 L2 - stars : Wolf-Rayet;stars : atmospheres;stars : mass-loss;ISM : abundances;ISM : planetary nebulae : individual : SMP 61;ISM : planetary nebulae : general;WOLF-RAYET NUCLEI; INTERMEDIATE-MASS STARS; HUBBLE-SPACE-TELESCOPE; APPROXIMATE LAMBDA-OPERATORS; DEFICIENT CENTRAL STARS; WC CENTRAL STARS; SPECTRAL-ANALYSES; EXPANDING ATMOSPHERES; MAGELLANIC CLOUDS; TEMPERATURE-FLUCTUATIONS SO - Astronomy & Astrophysics 2004 ;413(1):329-+ 12555 UI - 6471 AU - Stepanov S AU - Rodriguez P AU - Trivedi S AU - Wang CC AD - INAOE, Puebla 72000, MexicoBrimrose Corp Amer, Baltimore, MD 21236, USAStepanov, S, INAOE, Ap Post 51 & 216, Puebla 72000, Mexico TI - Effective broadband detection of nanometer laser-induced ultrasonic surface displacements by CdTe : V adaptive photoelectromotive force detector AB - Results of experiments studying the utilization of adaptive CdTe:V photoelectromotive force (photo-EMF) detector for high-sensitivity broadband detection of laser-generated ultrasound are presented. Unlike widely used GaAs photo-EMF detectors, the devices used here demonstrate no significant electron-hole competition. This ensures effective detection of congruent to1 nm surface displacements with congruent to0.1 mW of the signal beam power in 10 MHz detection frequency band, even in simple transverse detector configuration. For the wavelength of lambda=852 nm used in the experiments, the dielectric cutoff frequency of a typical device was approaching 1 MHz. This, in principle, enables monitoring of as-processed objects moving with in-plane velocities up to 10 m/s. (C) 2004 American Institute of Physics MH - Mexico|Puebla MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 5 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000188114300046 SO - Applied Physics Letters 2004 ;84(3):446-448 12556 UI - 3764 AU - Stephens CR AU - Waelbroeck H AU - Talley S AU - Cruz R AU - Ash AS AD - Adapt Technol Inc, Glendale, AZ 85310, USAUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoeXa Inc, New York, NY 10017, USABoston Univ, Sch Med, Boston, MA 02215, USADxCG Inc, Boston, MA, USAStephens, CR, Adapt Technol Inc, 6424 W Chisum Trail, Glendale, AZ 85310 USA TI - Predicting healthcare costs using classifiers MH - USA MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000225040600151 SO - Genetic and Evolutionary Computation Gecco 2004 , Pt 2, Proceedings 2004 ;3103():1330-1331 12557 UI - 3965 AU - Stern MP AU - Williams K AU - Gonzalez-Villalpando C AU - Hunt KJ AU - Haffner SM AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78229, USAAmer British Cowdray Hosp, Ctr Estudios Diabetes, Mexico City, DF, MexicoInst Mexicano Seguro Social, Hosp Gabriel Mancera, Unidades Invest Med Enfermedades Metab & Epidemio, Mexico City, DF, MexicoStern, MP, Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA TI - Does the metabolic syndrome improve identification of individuals at risk of type 2 diabetes and/or cardiovascular disease? AB - OBJECTIVE- The metabolic syndrome has been promoted as a method for identifying high-risk individuals for type 2 diabetes and cardiovascular disease (CVD). We therefore sought to compare this syndrome, as defined by the National Cholesterol Education Program, to the Diabetes Predicting Model and the Framingham Risk Score as predictors of type 2 diabetes and CVD, respectively. RESEARCH DESIGN AND METHODS- A population-based sample of 1,709 initially nondiabetic San Antonio Heart Study (SAHS) participants were followed for 7.5 years, 195 of whom developed type 2 diabetes. Over the same time interval, 156 of 2,570 SANS participants experienced a cardiovascular event. A population-based sample of 1,353 initially nondiabetic Mexico City Diabetes Study (MCDS) participants were followed for 6.5 years, 125 of whom developed type 2 diabetes. Baseline measurements included medical history, age, sex, ethnicity, smoking status, BMI, blood pressure, fasting and 2-h plasma glucose levels, and fasting serum total and HDL cholesterol and triglycerides. RESULTS- The sensitivities for predicting diabetes with the metabolic syndrome were 66.2 and 62.4% in the SAHS and the MCDS, respectively, and the false-positive rates were 27.8 and 38.7%, respectively. The sensitivity and false-positive rates for predicting CVD with the metabolic syndrome in the SAHS were 67.3 and 34.2%, respectively. At corresponding false-positive rates, the two predicting models had significantly higher sensitivities and, at corresponding sensitivities, significantly lower false-positive rates than the metabolic syndrome for both end points. Combining the metabolic syndrome with either predicting model did not improve the of either end point. CONCLUSIONS- The metabolic syndrome is inferior to established predicting models for either type 2 diabetes or CVD MH - Mexico|Distrito Federal MH - USA PB - ALEXANDRIA: AMER DIABETES ASSOC RP - NOT IN FILE U3 - TC 102 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0149-5992 UR - ISI:000224825800017 L2 - GLUCOSE-TOLERANCE TEST; MELLITUS; MORTALITY; NEED SO - Diabetes Care 2004 ;27(11):2676-2681 12558 UI - 5449 AU - Stolik S AU - Valor A AU - Tomas SA AU - Reguera E AU - Sanchez F AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07360, DF, MexicoCtr Aplicac Tecnol & Desarrollo Nucl, Playa, Ciudad Habana, CubaUniv La Habana, Fac Fis, Vedado, Ciudad Habana, CubaUniv La Habana, Inst Mat & React, Vedado, Ciudad Habana, CubaTomas, SA, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, AP 14-740, Mexico City 07360, DF, Mexico TI - Determination of the thermal diffusivity of calcium salts of saturated carboxylic acids AB - Calcium soaps are materials that serve a wide range of industrial applications such as softeners, detergents, plasticizers, greases, lubricants, cosmetics, and medicines. In addition, calcium salts of saturated carboxylic acids are of interest because of their presence in the staple food of Mexicans and other Central American people: the corn tortilla. Because of their wide use in industry, a knowledge of the thermal properties of the alkaline metal soaps is of great importance. In the present work, the thermal diffusivity of butyric-Ca, valeric-Ca, caprilic-Ca, undecanoic-Ca, palmitic-Ca, and stearic-Ca salts has been determined by photoacoustics. The thermal diffusivity of these salts shows a linear dependence on the number of carbons in the aliphatic chain, and was found within the range 2.60 x 10(-3) to 1.38 x 10(-2) cm(2) . s(-1), with the highest and lowest values corresponding to butyric-Ca and stearic-Ca, respectively MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000221530400019 L2 - calcium salts;carboxylic acids;open photoacoustic cell;thermal diffusivity;WATER-VAPOR PERMEABILITY; CORN PERICARP; DECOMPOSITION; BEHAVIOR; STEARATE SO - International Journal of Thermophysics 2004 ;25(2):511-517 12559 UI - 3502 AU - Strenth NE AU - Howells RG AU - Correa-Sandoval A AD - Angelo State Univ, Dept Biol, San Angelo, TX 76909, USAHOH Fisheries Sci Ctr, Texas Pk & Wildlife Dept, Ingram, TX 78025, USAInst Technol Cd Victoria, Zool Lab, Cd Victoria, Tamaulipas, MexicoStrenth, NE, Angelo State Univ, Dept Biol, San Angelo, TX 76909, USA TI - New records of the Texas hornshell Popenaias popeii (Bivalvia : Unionidae) from Texas and northern Mexico AB - The Texas hornshell (Popenaias popeii) is reported and documented from the South Concho River in west central Texas and the Rio Sabinas of northern Coahuila, both new site records. These records confirm the known distributional range of this species in the Colorado River drainage of central Texas and establishes a new interior state record for Coahuila. Recently collected shell material of P. popeii is also reported from the Devils River above Amistad Reservoir and from the Rio Salado above Falcon Reservoir MH - Mexico|Tamaulipas MH - USA PB - LUBBOCK: TEXAS ACAD SCI RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0040-4403 UR - ISI:000226017500005 SO - Texas Journal of Science 2004 ;56(3):223-230 12560 UI - 4504 AU - Suarez-Morales E AU - Tovar E AD - El Colegio Frontera Sur ECOSUR, Undiad Chetumal, Mexico City 77000, DF, MexicoNatl Museum Nat Hist, Washington, DC 20560, USASuarez-Morales, E, El Colegio Frontera Sur ECOSUR, Undiad Chetumal, AP 424, Mexico City 77000, DF, Mexico TI - Postnaupliar stages of a thaumatopsyllid copepod from a reef area of the western Caribbean Sea AB - Copepods of the recently established order Thaumatopsylloida are semi-parasitic forms in which naupliar development takes place inside ophiurid echinoderms; the postnaupliar stages are free-living. The morphology and development of the postnaupliar stages of this order remain practically unstudied. Plankton samples collected at night time following the lunar cycle in a reef area of the Mexican Caribbean coast yielded different copepodid stages of Caribeopsyllus chawayi Suarez-Morales, one of the two thaumatopsylloid species known in the western hemisphere. Five female copepodid stages (CI-III, CV, CVI) are described and illustrated in detail. Both copepodid and adult forms are devoid of mouthparts and antennae. This species appears to moult rapidly from CIII into a pre-adult CV by acquiring a distinctive elongation of the anal somite and a clearly different segmentation pattern of legs 1-3. Morphological and morphometric changes during postnaupliar development of several structures were analysed and compared with unpublished observations on another thaumatopsylloid (Thespesiopsyllus paradoxus Sars). Among other characters, the one-step elongation of the anal somite in our specimens contrasts with the gradual pattern shown by T paradoxus. It is suggested that the pre-adult form of C. chawayi appears after the CIII stage; unlike other copepods, the number of setal elements in the CIII stage is unchanged in older copepodids. The delayed formation of (1) leg 1 coxal seta, (2) the arthrodial membrane separating the proximal segments of legs 1 and 2, and (3) legs 3 segmental divisions seem to be derived characters relative to previously known patterns in the Copepoda. An expanded description of the adult is presented based on the new material. The size and general morphology of the holotype of this species corresponds to a CV; however, the presence of a genital opening at this stage suggests that females may copulate at CV. The CV and adult forms occurred exclusively during the full moon phase, whereas CI-CIII copepodids were collected during half moon only; no specimens were collected at the new moon phase. This is possibly a result of a strategy related to both the encounter of mate and host and a tide-stream selective transport in this reef area MH - Mexico|Distrito Federal MH - USA PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0036-4827 UR - ISI:000223701000001 L2 - Copepoda;taxonomy;invertebrate development;Crustacea;zooplankton;DEVELOPMENTAL PATTERNS; DIOITHONA-OCULATA; SWIMMING LEGS; CYCLOPOIDA; NUMBERS SO - Sarsia 2004 ;89(4):223-244 12561 UI - 5254 AU - Suarez-Morales E AU - Rayner NA AD - Colegio Frontera Sur Chetumal, Chetumal 77000, Quintana Roo, MexicoSmithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560, USAUniv Durban Westville, Dept Zool, ZA-4000 Durban, South AfricaSuarez-Morales, E, Colegio Frontera Sur Chetumal, AP 424, Chetumal 77000, Quintana Roo, Mexico TI - New records for the South African diaptomid fauna with a complementary description of Paradiaptomus lamellatus Sars (Copepoda, Diaptomidae) AB - Information on the freshwater calanoid fauna of South Africa is incomplete. Recent collections from several environmental sites in the Western Cape Province of South Africa yielded new records of diaptomid copepods. Material was collected from more than 30 different localities. Species recorded from these sites were: Lovenula simplex Kiefer, Paradiaptomus lamellatus Sars, P. hameri Rayner, Metadiaptomus purcelli (Sars) and M. capensis (Sars). New information on the distributional and ecological ranges of these species is provided as well. Paradiaptomus lamellatus, the type species of the genus, was described more than a century ago by G. O. Sars (1895) based on material collected in South Africa by W. F. Purcell. Although in recent years other closely related Paradiaptomus species have been described using a wider set of characters, P. lamellatus has not been redescribed. The type specimens of this species are lost; hence, in the light of current taxonomic and biogeographical knowledge, it is important that the type species of Paradiaptomus (P. lamellatus ) be redescribed. This redescription was based on male and female specimens of P. lamellatus collected from Groot Rondevlei, a brown water vlei located on the Cape peninsula of South Africa. New characters are described and depicted including details of the mouth appendages, furcal rami, and male and female fifth legs. Comments on intraspecific variability and habitat preference are included MH - Mexico|Quintana Roo MH - South Africa MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0022-2933 UR - ISI:000221933400001 L2 - Calanoida;copepods;new records;freshwater fauna;biogeography;limnobiology;redescription;South Africa SO - Journal of Natural History 2004 ;38(22):2803-2819 12562 UI - 5264 AU - Suarez-Morales E AU - Reid JW AU - Fiers F AU - Iliffe TM AD - Colegio Frontera Sur ECOSUR, Chetumal 77000, Quintana Roo, MexicoSmithsonian Inst, Natl Museum Nat Hist, Washington, DC, USAVirginia Museum Nat Sci, Martinsville, VA, USARoyal Belgian Inst Nat Sci, Invertebrate Sect, Brussels, BelgiumTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USASuarez-Morales, E, Colegio Frontera Sur ECOSUR, Km 5-5,Av Centenario, Chetumal 77000, Quintana Roo, Mexico TI - Historical biogeography and distribution of the freshwater cyclopine copepods (Copepoda, Cyclopoida, Cyclopinae) of the Yucatan Peninsula, Mexico AB - Aim To determine and analyse the distribution of the freshwater cyclopine copepod fauna of the Yucatan Peninsula (YP) and its relationship with the geological and climatic history of this Neotropical karstic zone. Location The Yucatan Peninsula, Mexico. Methods Plotting of georeferenced sites, analysis of local and regional geological and climatic history, analysis and comparison of regional and local faunistic records. Results Distinct dispersal and/or vicariant processes seem to be linked to the current distributions of the seven genera known in the YP. In general, the endemic hypogean or benthic crevicular forms (i.e. Diacyclops chakan, D. puuc and Mesocyclops chaci), derived from epigean, tropical, widely distributed forms (some of them South American) may have been among the earliest colonizers of the subterranean habitats in the YP. The distribution of these and other endemic forms seem to be related to the Holocene dry periods that desiccated the largest bodies of water and isolated local populations of different species. These vicariant processes resulted in forms with restricted distributional areas; some of these formed sister species that speciated in geographically close localities but related to a common identifiable ancestor. Overall, the processes of cyclopine colonization of the YP show the influence of the South American fauna, as the closest relatives of some species endemic to the YP are South American forms; the Nearctic influence is low. The cyclopine fauna of the YP is formed by a mixture of Nearctic-derived (species of Acanthocyclops), Neotropical (i.e. M. edax, M. longisetus, A. panamensis, Thermocyclops inversus and T. tenuis), and epigean and hypogean endemic forms. The highly dynamic geomorphology of the YP and the recent climatic changes in the Holocene define the YP as a peculiar subregion that harbours a diverse fauna of cyclopine copepods with a high endemism. Main conclusion The current distribution of cyclopine copepods reflects relatively recent, post-Pliocene biogeographical patterns; probably older patterns are involved as well. The eastern coast of the Yucatan is the most recently colonized by cyclopine copepods. Most of the genera are linked with South American forms, and the Nearctic influence is weakly represented. This group has no marine relatives, but there is evidence of vicariant events involving cave-dwelling forms MH - Belgium MH - Mexico|Quintana Roo MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Ecology;Geography, Physical U5 - J;Article AV - English IS - 0305-0270 UR - ISI:000221906700002 L2 - limnology;distributional patters;freshwater biogeography;karstic environments;zooplankton;CRUSTACEA; AMERICAN; MESOCYCLOPS; EVOLUTION; RECORDS; CLIMATE; FAUNA; SARS SO - Journal of Biogeography 2004 ;31(7):1051-1063 12563 UI - 3821 AU - Suarez-Orduna R AU - Rendon-Angeles JC AU - Matamoros-Veloza Z AU - Yanagisawa K AD - Ctr Inve Carr, Coahuila 25900, MexicoIPN, Ctr Invest & Estud Avanzados, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoInst Tecnol Saltillo, Dep Met Mecan, Saltillo 25820, Coahuila, MexicoKochi Univ, Res Lab Hydrothermal Chem, Kochi 7808520, JapanRendon-Angeles, JC, Ctr Inve Carr, Saltillo Mty Km,13 5 Col Mollinos del Rey, Coahuila 25900, Mexico TI - Exchange of SO42- ions with F- ions in mineral celestite under hydrothermal conditions AB - The exchange of SO42- ions by monovalent ions, F- and OH-, in mineral strontium sulphate (celestite) single crystals was investigated under hydrothermal conditions at low temperature (150-250degreesC), for various reaction intervals between 1 and 96 h, with different molar ratios of (F- or OH-)/SO42- = 1, 5, 10. The conversion of celestite crystals into SrF2 was completed at 250 degreesC in NaF solutions. The conversion proceeded to SrF2 without severe morphological changes, regarding the original shape and dimension of the crystals. It was found that the conversion proceeds by a pseudomorphic ion exchange process achieved by a mechanism of dissolution-precipitation. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0167-2738 UR - ISI:000225139100079 L2 - hydrothermal treatment;ion exchange;mineral replacement;strontium compounds;dissolution-precipitation mechanism SO - Solid State Ionics 2004 ;172(1-4):393-396 12564 UI - 5509 AU - Suarez-Orduna R AU - Rendon-Angeles JC AU - Lopez-Cuevas J AU - Yanagisawa K AD - IPN, Ctr Invest & Estudios Avanzados, Unidad Saltillo, Saltillo 25000, Coahuila, MexicoKochi Univ, Res Lab Hydrothermal Chem, Kochi 7808520, JapanSuarez-Orduna, R, IPN, Ctr Invest & Estudios Avanzados, Unidad Saltillo, Apartado Postal 663, Saltillo 25000, Coahuila, Mexico TI - The conversion of mineral celestite to strontianite under alkaline hydrothermal conditions AB - The exchange of SO42- ions with CO32- ions in natural strontium sulfate (celestite) single crystals was investigated under alkaline hydrothermal conditions. The hydrothermal treatments were conducted using a stainless steel Teflon-lined vessel. Experiments were performed at different temperatures from 150 to 250degreesC for various reaction times between 1 and 96 h with a molar ratio of CO32-/SO42- = 1, 5 and 10. Structural characterization of partially and completely converted strontianite (SrCO3) crystals was conducted by XRD, FTIR and SEM. X-ray diffraction results showed that under hydrothermal conditions the exchange of CO32- ions in celestite was completed at 250degreesC in a Na2CO3 solution with a molar ratio CO32-/SO42- = 10 for 96 h, and celestite changed to strontianite. The morphology of the converted strontianite crystals depicted that the conversion proceeds without severe changes of the original shape and dimension of the crystals. A peculiar texture, however, consisting of elongated channels and tiny holes distributed randomly normal to the (001) cleavage plane, was formed in order to compensate the dimensional change of the lattice parameters associated with the conversion of celestite to strontianite. Details regarding the conversion mechanism are discussed in the present work MH - Japan MH - Mexico|Coahuila PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 10 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000221320800047 L2 - TOPOTAXIAL REPLACEMENT; CARBONATE SOLUTION; ION-EXCHANGE; HYDROXYAPATITE; CHLORAPATITE SO - Journal of Physics-Condensed Matter 2004 ;16(14):S1331-S1344 12565 UI - 4398 AU - Suarez-Quiroz ML AU - Gonzalez-Rios O AU - Barel M AU - Guyot B AU - Schorr-Galindo S AU - Guiraud JP AD - Univ Montpellier 2, ENSAM, INRA, UM 1212,UMR IR2B, F-34095 Montpellier 5, FranceCIRAD CP, F-34398 Montpellier, FranceInst Tecnol Veracruz, Veracruz 91860 5, Ver, MexicoGuiraud, JP, Univ Montpellier 2, ENSAM, INRA, UM 1212,UMR IR2B, CC 023,PL Eugene Bataillon, F-34095 Montpellier 5, France TI - Effect of chemical and environmental factors on Aspergillus ochraceus growth and toxigenesis in green coffee AB - Post-harvest processing (traditional or ecological wet method, and dry method) and coffee pH did not play a significant role in Aspergillus ochraceus growth and OTA production. However, A(w) did play a key role: the optimum for growth and toxigenesis was 0.95; below 0.80, coffee was protected. Temperature affected the rate of toxin production, when A(w) was compatible: toxigenesis occurred from 10degreesC with an optimum at 35degreesC. The critical stage in the process was drying, where conditions propitious to A. ochraceus (A(w) of 0.99-0.80) could be found for 2 days or more. Caffeine and chlorogenic acids had an inhibiting effect on OTA production. (C) 2004 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Veracruz PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Biotechnology & Applied Microbiology;Food Science & Technology;Microbiology U5 - J;Article AV - English IS - 0740-0020 UR - ISI:000223911000001 L2 - Aspergillus ochraceus;ochratoxin A;water activity;coffee processing;OCHRATOXIN-A; CHLOROGENIC ACIDS; WATER ACTIVITY; CAFFEINE; TEMPERATURE; COMPLEX; FUNGI; PURE SO - Food Microbiology 2004 ;21(6):629-634 12566 UI - 4388 AU - Sujo LC AU - Cabrera MEM AU - Villalba L AU - Villalobos MR AU - Moye ET AU - Leon MG AU - Garcia-Tenorio R AU - Garcia FM AU - Peraza EFH AU - Aroche DS AD - Ctr Invest Mat Avanzados, SC, Chihuahua 31109, MexicoInst Tecnol Chihuahua 2, Chihuahua 31109, MexicoUniv Sevilla, Dept FAMN, Seville, SpainUniv Autonoma Zacatecas, CREN, Zacatecas, MexicoCabrera, MEM, Ctr Invest Mat Avanzados, SC, Complejo Ind Chihuahua,Miguel Cervantes 120, Chihuahua 31109, Mexico TI - Uranium-238 and thorium-232 series concentrations in soil, radon-222 indoor and drinking water concentrations and dose assessment in the city of Aldama, Chihuahua, Mexico AB - High-resolution gamma spectrometry was used to determine the concentration of K-40, U-238 and Th-232 series in soil samples taken from areas surrounding the city of Aldama, in Chihuahua. Results of indoor air short-time sampling, with diffusion barrier charcoal detectors, revealed relatively high indoor radon levels, ranging from 29 to 422 Bq/m(3); the radon concentrations detected exceeded 148 Bq/m(3) in 76% of the homes tested. Additionally, liquid scintillation counting showed concentrations of radon in drinking water ranging from 4.3 to 42 kBq/m(3). The high activity of U-238 in soil found in some places may be a result of the uranium milling process performed 20 years ago in the area. High radon concentrations indoor and in water may be explained by assuming the presence of uranium-bearing rocks MH - Mexico|Chihuahua MH - Mexico|Zacatecas MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0265-931X UR - ISI:000223934000008 L2 - U-238;Th-232;Rn-222;indoor air;soil;drinking water;effective dose;Chihuahua;Mexico;RADON; DWELLINGS; NORM SO - Journal of Environmental Radioactivity 2004 ;77(2):205-219 12567 UI - 4448 AU - Sun Y AD - Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Mor, MexicoNatl Res Ctr Geoanal, Beijing 100037, Peoples R ChinaSun, Y, Univ Nacl Autonoma Mexico, Ctr Invest Energia, Priv Xochicalco S-N Ctr,Apdo Postal 34, Temixco 62580, Mor, Mexico TI - Detailed study on simultaneous separation of rare earth elements by capillary electrophoresis AB - Separation of all rare earth elements (REEs) by capillary zone electrophoresis was investigated in a system of alpha-hydroxyisobutyric acid (HIBA) as a main complex reagent and acetic acid (HAc) as an assistant complex reagent. In the combined system, ligand Ac- plays an important role in improving separation of Eu and Gd, and Y and Dy. The calculated ratio of Ac- to HIB- concentrations was compared and demonstrated that Eu and Gd, and Y and Dy tend to be separated at lower, and higher ratio of the two free ligands, respectively. An operational buffer system was developed for a complete separation of all REE ions. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 0021-9673 UR - ISI:000223813800012 L2 - rare earth elements;europium;gadolinium;yttrium;dysprosium;alpha-hydroxyisobutyric acid;acetic acid;capillary zone electrophoresis;DIRECT UV DETECTION; ZONE-ELECTROPHORESIS; METAL-IONS; LANTHANIDES; ISOTACHOPHORESIS; EQUILIBRIA; ABSORBENCY; COMPLEXES; CATIONS; ACID SO - Journal of Chromatography A 2004 ;1048(2):245-251 12568 UI - 4803 AU - Suzuki T AU - gado-Escueta AV AU - Aguan K AU - Alonso ME AU - Shi J AU - Hara Y AU - Nishida M AU - Numata T AU - Medina MT AU - Takeuchi T AU - Morita R AU - Bai DS AU - Ganesh S AU - Sugimoto Y AU - Inazawa J AU - Bailey JN AU - Ochoa A AU - Jara-Prado A AU - Rasmussen A AU - Ramos-Peek J AU - Cordova S AU - Rubio-Donnadieu F AU - Inoue Y AU - Osawa M AU - Kaneko S AU - Oguni H AU - Mori Y AU - Yamakawa K AD - RIKEN, Brain Sci Inst, Neurogenet Lab, Wako, Saitama 3510198, JapanTokyo Med & Dent Univ, Med Res Inst, Dept Mol Cytogenet, Tokyo, JapanUniv Calif Los Angeles, David Geffen Sch Med, Comprehens Epilepsy Program, Epilepsy Genet Gen Labs, Los Angeles, CA 90024, USAVA GLAHS W Los Angeles, W Los Angeles DVA Med Ctr, Los Angeles, CA 90073, USANatl Inst Neurol & Neurosurg, Mexico City, DF, MexicoGrad Univ Adv Studies, Ctr Integrat Biosci, Okazaki, Aichi, JapanKyoto Univ, Grad Sch Engn, Kyoto, JapanNatl Autonomous Univ, Tegucigalpa, HondurasUniv Calif Los Angeles, David Geffen Sch Med, Inst Neuropsychiat, Los Angeles, CA, USAShizuoka Med Inst Neurol Disorders, Natl Epilepsy Ctr, Shizuoka, JapanTokyo Womens Med Univ, Dept Pediat, Tokyo, JapanHirosaki Univ, Sch Med, Dept Neuropsychiat, Aomori, JapanDelgado-Escueta, AV, RIKEN, Brain Sci Inst, Neurogenet Lab, 2-1 Hirosawa, Wako, Saitama 3510198, Japan TI - Mutations in EFHC1 cause juvenile myoclonic epilepsy AB - Juvenile myoclonic epilepsy (JME) is the most frequent cause of hereditary grand mal seizures(1,2). We previously mapped and narrowed a region associated with JME on chromosome 6p12-p11 (EJM1)(3-5). Here, we describe a new gene in this region, EFHC1, which encodes a protein with an EF-hand motif. Mutation analyses identified five missense mutations in EFHC1 that cosegregated with epilepsy or EEG polyspike wave in affected members of six unrelated families with JME and did not occur in 382 control individuals. Overexpression of EFHC1 in mouse hippocampal primary culture neurons induced apoptosis that was significantly lowered by the mutations. Apoptosis was specifically suppressed by SNX-482, an antagonist of R-type voltage-dependent Ca2+ channel (Ca(v)2.3). EFHC1 and Ca(v)2.3 immunomaterials overlapped in mouse brain, and EFHC1 coimmunoprecipitated with the Cav2.3 C terminus. In patch-clamp analysis, EFHC1 specifically increased R-type Ca2+ currents that were reversed by the mutations associated with JME MH - Honduras MH - Japan MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 71 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1061-4036 UR - ISI:000222974000016 L2 - IDIOPATHIC GENERALIZED EPILEPSY; CHILDHOOD ABSENCE EPILEPSY; E CALCIUM-CHANNEL; CA2+ CHANNEL; GENE; LINKAGE; CANDIDATE; SUBUNIT; LOCUS; HETEROGENEITY SO - Nature Genetics 2004 ;36(8):842-849 12569 UI - 4658 AU - Szatzschneider W AU - Jeanblanc M AU - Kwiatkowska T AD - Univ Anahuac, Escuela Actuaria, Mexico City 52760, Huixquilucan, MexicoUniv Evry Val Essone, Dept Math, F-91025 Evry, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Filosofia, Mexico City 09340, San Rafael Atli, MexicoSzatzschneider, W, Univ Anahuac, Escuela Actuaria, Mexico City 52760, Huixquilucan, Mexico TI - Environment and financial markets AB - We propose to put the environment into financial markets. We explain how to do it, and why the financial approach is practically the only one suited for stopping and inverting environmental degradation. We concentrate our attention on deforestation, which is the largest environmental problem in the third world, and explain how to start the project and what kind of optimization problems should be solved to ensure the optimal use of environmental funds. In the final part we analyze the dynamical control for bounded processes and awards partially based on the mean of the underlying value MH - France MH - Mexico|Estado De Mexico MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000223079700102 SO - Computational Science - Iccs 2004, Proceedings 2004 ;3039():787-794 12570 UI - 4252 AU - Tabata T AU - Yamasaki Y AU - Ogura T AD - Kobe Womens Univ, Seto Jr Coll, Okayama 7090863, JapanUniv Autonoma Guadalajara, Dept Quim, CEN, Guadalajara, Jalisco, MexicoTabata, T, Kobe Womens Univ, Seto Jr Coll, 721 Kannonji, Okayama 7090863, Japan TI - Comparison of chemical compositions of maitake (Grifola frondosa (Fr.) S. F. Gray) cultivated on logs and sawdust substrate AB - Maitake mushroom was cultivated on logs and in sawdust substrate. Comparisons of proximate compositions, content of free amino acid, 5'-nucleotides and vitamin D-2 were conducted. Effects of the log and sawdust substrate compositions on the mushroom composition were also examined. Protein and ash in sawdust mushroom were significantly higher than that in the log mushroom. Protein content of fruit body cultivated on sawdust substrate was closely related to the content of the substrate. This fact well explained the difference in protein and ash contents between mushroom cultivated on log or sawdust substrate. Free amino acid content as MSG-like and sweetness components, and 5'-GMP were significantly higher in log mushroom. The content of vitamin D-2 was appreciably higher in sawdust mushroom than that in log mushroom MH - Japan MH - Mexico|Jalisco PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1344-6606 UR - ISI:000224196000006 L2 - Maitake mushroom;log;sawdust substrate;proximate composition;free amino acid;5 '-GMP;vitamin D-2;NONVOLATILE TASTE COMPONENTS; FRUIT-BODY; EDIBLE MUSHROOMS; AMINO-ACIDS SO - Food Science and Technology Research 2004 ;10(1):21-24 12571 UI - 4253 AU - Tabata T AU - Ogura T AD - Kobe Womens Univ, Seto Jr Coll, Okayama 7090863, JapanUniv Autonoma Guadalajara, Dept Quim, CEN, Guadalajara, Jalisco, MexicoTabata, T, Kobe Womens Univ, Seto Jr Coll, 721 Kannonji, Okayama 7090863, Japan TI - Proximate and free amino acid composition during development of fruit body of Kuroawabitake (Pleurotus abalonus Han, Chen et Cheng) AB - Kuroawabitake (Pleurotus abalonus) were divided into two parts during development of fruit body: coremia (black-headed coremioid) and fruit body. The proximate compositions and free amino acids were determined. There was no marked difference between the coremia and fruit body in proximate composition of protein and carbohydrate (dry weight). The fruit body was high in moisture and fat, whereas the ash was high in coremia. The fruit body contained higher amounts of total free amino acids than the coremia. The contents of monosodium glutamate-like components, including aspartic and glutamic acids, were high in fruit body, and the two parts were considerably different tasting in their amino acids MH - Japan MH - Mexico|Jalisco PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 0 U4 - Food Science & Technology U5 - J;Article AV - English IS - 1344-6606 UR - ISI:000224196000008 L2 - Kuroawabitake (Pleurotus abalonus);coremia;fruit body;proximate composition;free amino acid;WATER-SOLUBLE POLYSACCHARIDES; SAWDUST-BASED CULTIVATION; TROPICAL MUSHROOMS; SERUM-CHOLESTEROL; ELEVATION CONTROL; PROTEIN; BODIES; RATS SO - Food Science and Technology Research 2004 ;10(1):32-34 12572 UI - 4952 AU - Tadin-Strapps M AU - Warburton D AU - Salas-Alanis JC AU - Lopez-Cepeda LD AU - Christiano AM AD - Columbia Univ Coll Phys & Surg, Dept Dermatol, New York, NY 10032, USAColumbia Univ, Dept Pediat, New York, NY 10032, USAColumbia Univ Coll Phys & Surg, Dept Genet & Dev, New York, NY 10032, USAUniv Autonoma Nuevo Leon, Med Serv, Monterrey, MexicoSSPDF, Ctr Dermatol Dr Ladislao de la Pascua, Mexico City, DF, MexicoChristiano, AM, Columbia Univ Coll Phys & Surg, Dept Dermatol, 630 W 168th St VC1526, New York, NY 10032 USA TI - Fishing for new genes in skin biology: impact of cytogenetics on gene discovery AB - Research into the field of skin biology has grown exponentially over the past two decades. Even though the fundamental molecular pathways are still not fully understood, there have been significant advances in our understanding of the underlying mechanisms involved in the pathogenesis of genodermatosis. The cloning of many candidate genes involved in the etiology of skin diseases has been facilitated by initial cytogenetic evidence. This review will synthesize recent findings that led to the discovery of candidate genes for anhidrotic ectodermal dysplasia, Williams-Beuren syndrome, neurofibromatosis-I and tricho-rhino-phalangeal syndrome MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0009-9163 UR - ISI:000222682200002 L2 - Ambras syndrome;anhidrotic ectodermal dysplasia;cytogenetics;neurofibromatosis;skin biology;TRPS;Williams-Beuren syndrome;HYPOHIDROTIC ECTODERMAL DYSPLASIA; SUPRAVALVULAR AORTIC-STENOSIS; LANGER-GIEDION-SYNDROME; HEPATOCYTE GROWTH-FACTOR; SYNDROME TYPE-III; SOUTH EAST WALES; STEM-CELL FACTOR; SYNDROME TYPE-I; NEUROFIBROMATOSIS TYPE-1; WILLIAMS-SYNDROME SO - Clinical Genetics 2004 ;66(2):94-106 12573 UI - 4064 AU - Taillant E AU - vila-Vilchis JC AU - Allegrini C AU - Bricault I AU - Cinquin P AD - Lab TIMC IMAG, Equipe GMCAO, F-38706 La Tronche, FrancePRAXIM Medivis SA, F-38700 La Tronche, FranceUniv Autonoma Estado Mexico, Toluca 50130, MexicoCHU Grenoble, Serv Cent Imagerie Med, F-38700 La Tronche, FranceTaillant, E, Lab TIMC IMAG, Equipe GMCAO, F-38706 La Tronche, France TI - CT and MR compatible light puncture robot: Architectural design and first experiments AB - This paper presents a new robotic architecture designed to perform interventional CT/MR procedures, particularly punctures. Such procedures are very popular nowadays for diagnostic or therapeutic purposes. Innovations concerning the robotic architecture, materials and energy sources are exposed. We also introduce the control loop we use to check the movements and the positioning of the robot, including a new method to localize the robot thanks to the images coming from the imaging devices (CT or MRI). Finally, the results of the first experiments are presented MH - France MH - Mexico|Estado De Mexico PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224322400019 L2 - SYSTEM; GUIDANCE; INTERVENTIONS; BIOPSY SO - Medical Image Computing and Computer-Assisted Intervention - Miccai 2004, Pt 2, Proceedings 2004 ;3217():145-152 12574 UI - 5989 AU - Takesue RK AU - van Geen A AU - Carriquiry JD AU - Ortiz E AU - Godinez-Orta L AU - Granados I AU - Saldivar M AU - Ortlieb L AU - Escribano R AU - Guzman N AU - Castilla JC AU - Varas M AU - Salamanca M AU - Figueroa C AD - Lamont Doherty Earth Observ, Palisades, NY 10964, USAUniv Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoCtr Interdisciplinario Ciencias Marinas, La Paz 23000, BCS, MexicoInst Rech Dev, UR PALEOTROPIQUE, F-93143 Bondy, FranceConcepcion Univ, Ctr Oceanog Pacifico Oriental, Concepcion, ChileUniv Antofagasta, Antofagasta, ChilePontificia Univ Catolica Chile, Fac Ciencias Biol, Ctr Estudios Avanzados Ecol & Biodivers, Santiago, ChileConcepcion Univ, Dept Oceanog, Fac Ciencias Nat & Oceanog, Concepcion, ChileTakesue, RK, US Geol Survey, 345 Middlefield Rd,MS 496, Menlo Pk, CA 94025 USA TI - Influence of coastal upwelling and El Nino-Southern Oscillation on nearshore water along Baja California and Chile: Shore-based monitoring during 1997-2000 AB - [ 1] In order to determine the sensitivity of coastal upwelling tracers to seasonal wind forcing and El Nino-Southern Oscillation (ENSO) off Baja California and Chile, nearshore salinity, cadmium (Cd), and nutrients phosphate, silicate, nitrate+ nitrite were monitored in surf zone waters at six locations along the North and South American coasts during 1997-2000. The clearest responses to upwelling favorable wind forcing were observed at the southern tip of Baja California (23.3degreesN) and off central- southern Chile (36.5degreesS). Upwelling tracers at 23.3degrees N were also the most sensitive to El Nino: average summer Cd and nutrient enrichments were 60% lower following El Nino than during the previous non-El Nino upwelling season. At two sites on the northern and central Chile coasts, conditions associated with El Nino resulted in salinity anomalies >1. Such large shifts in nearshore water properties suggest it may be possible to reconstruct past ENSO patterns from geochemical paleonutrient/paleosalinity proxy records preserved in nearshore archives such as mollusc or foraminifera shells MH - USA MH - Chile MH - France MH - Mexico|Baja California MH - Mexico|Baja California Sur PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 6 U4 - Oceanography U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000220225600004 L2 - coastal upwelling;cadmium;nutrients;El Nino;Chile;Baja California;EQUATORIAL PACIFIC-OCEAN; GULF-OF-CALIFORNIA; NORTHEAST PACIFIC; CURRENT SYSTEM; LA-NINA; INTERANNUAL VARIABILITY; PHOSPHORUS REGENERATION; CLIMATE VARIABILITY; SUBOXIC SEDIMENTS; CADMIUM SO - Journal of Geophysical Research-Oceans 2004 ;109(C3): 12575 UI - 3770 AU - Talaie H AU - Emami H AU - Yadegarinia D AU - Nava-Ocampo AA AU - Massoud J AU - Azmoudeh M AU - Mas-Coma S AD - Shahid Beheshti Univ Med Sci, Educ Dev Ctr, Tehran 19395, IranShahid Beheshti Univ Med Sci, Natl Inst Res TB & Lung Dis, Tehran 19395, IranMinist Hlth & Med Educ, Ctr Control Communicable Dis, Tehran, IranTehran Univ Med Sci, Sch Publ Hlth, Tehran, IranTehran Univ Med Sci, Publ Hlth Res Inst, Tehran, IranTehran Univ Med Sci, Dept Med Parasitol & Med Mycol, Tehran, IranUniv Valencia, Fac Farm, Dept Parasitol, E-46010 Valencia, SpainHosp Infantil Mexico Dr Federico Gomez, Dept Clin Pharmacol, Mexico City, DF, MexicoTalaie, H, Shahid Beheshti Univ Med Sci, Educ Dev Ctr, 7th Floor,Tabnak Ave, Tehran 19395, Iran TI - Randomized trial of a single, double and triple dose of 10 mg/kg of a human formulation of triclabendazole in patients with fascioliasis AB - 1. A study performed >10 years ago and case reports published recently suggest that triclabendazole is effective for the treatment of patients with fascioliasis. 2. To confirm the efficacy of a human formulation of triclabendazole, we enrolled 165 patients into the present study and divided the subjects into two groups: (i) those who had fascioliasis, as evidenced by the presence of ova in their stools; and (ii) patients with clinical and laboratory data suggesting fascioliasis. 3. Patients were randomly allocated to receive 10 mg/kg, p.o., triclabendazole for 1, 2 or 3 days (single-, double- and triple-dose groups, respectively). Medical history and physical and laboratory examinations were performed at baseline and at 7, 14, 30 and 60 days after treatment. Results were based on 152 patients who completed the study. 4. A sharp decrease in the proportion of clinical signs and symptoms was observed in all groups immediately after treatment. Ova disappeared from the stools of all patients in the single- and double-dose groups. Thirty days after treatment, ova were identified in the stools of two patients in the triple-dose group who received a second course of triclabendazole. 5. All cases were cured on day 60. However, the cure rate was lower when the patients with suggestive fascioliasis were included in the analysis. The cure rate was not significantly different (P > 0.05) among the three dose groups. No cases of toxic hepatitis were observed. 6. In conclusion, oral administration of 10 mg/kg of the human pharmaceutical preparation of triclabendazole for 1-3 days is safe and effective in the treatment of human fascioliasis MH - Iran MH - Mexico|Distrito Federal MH - Spain PB - CARLTON: BLACKWELL PUBLISHING ASIA RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy;Physiology U5 - J;Article AV - English IS - 0305-1870 UR - ISI:000225490400005 L2 - antihelmintics;antiparasitic drugs;communicable disease control;drug dose-response relationship;HEPATICA INFECTION; RESISTANCE SO - Clinical and Experimental Pharmacology and Physiology 2004 ;31(11):777-782 12576 UI - 5289 AU - Tan M AU - Johns D AU - Galvez GG AU - Antunez O AU - Fabian G AU - Flores-Lozano F AU - Guajardo SZ AU - Garza E AU - Morales H AU - Konkoy C AU - Herz M AD - Eli Lilly & Co, Lilly Corp Ctr, Indianapolis, IN 46285, USAHosp Civil Dr Juan I Menchaca, Guadalajara, Jalisco, MexicoInst Mexicano Invest Clin, Mexico City, DF, MexicoInst Nacl Enfermedades Resp, Mexico City, DF, MexicoHosp Dr Angel Leano, Zapopan, MexicoClin Cuauhtemoc & Famosa, Monterrey, MexicoClin Hosp Solidar, Monterrey, MexicoTan, M, Eli Lilly & Co, Lilly Corp Ctr, Indianapolis, IN 46285, USA TI - Effects of pioglitazone and glimepiride on glycemic control and insulin sensitivity in Mexican patients with type 2 diabetes mellitus: A multicenter, randomized, double-blind, parallel-group trial AB - Background: Pioglitazone and glimepiride improve glycemic control in patients with type 2 diabetes mellitus by different mechanisms. Pioglitazone is a thiazolidinedione that reduces insulin resistance, and glimepiride is a sulfonylurea insulin secretagogue. Objective: The goals of this study were to compare changes in measures of glycemic control and insulin sensitivity in Mexican patients with type 2 diabetes who received pioglitazone or glimepiride for 1 year. Methods: This was a multicenter, 52-week, double-blind, parallel-group trial. Patients were randomized to receive monotherapy with either glimepiride (2 mg QD initially) or pioglitazone (15 mg QD initially). Doses were titrated (maximal doses: pioglitazone 45 mg, glimepiride 8 mg) to achieve glycemic targets (fasting blood glucose less than or equal to7 mmol/L and 1-hour postprandial blood glucose less than or equal to10 mmol/L. Insulin sensitivity (primary end point) was evaluated in terms of the Homeostasis Model Assessment for Insulin Sensitivity (HOMA-S), the Quantitative Insulin Sensitivity Check Index (QUICKI), and fasting serum insulin (FSI) concentrations. Glycemic control was evaluated in terms of glycosylated hemoglobin (HbA(1c)) values and fasting plasma glucose (FPG) concentrations. Patients were encouraged to maintain their individual diet and exercise regimens throughout the study Results: Two hundred forty-four patients (125 women, 119 men; all but 1 Hispanic) were randomized to receive pioglitazone (n = 121) or glimepiride (n = 123). In the intent-to-treat sample, pioglitazone and glimepiride produced comparable reductions in HbA(1c) from baseline to the end of the study (-0.78% and -0.68%, respectively). The pioglitazone group had significantly higher HbA(1c) values compared with the glimepiride group after 12 weeks of therapy (8.66% vs 7.80%; P = 0.007) but had significantly lower values after 52 weeks (7.46% vs 7.77%- P = 0.027). Pioglitazone significantly reduced FPG compared with glimepiride (-0.6 vs 0.6 mmol/L; P = 0.01). Pioglitazone therapy was associated with significant increases in insulin sensitivity (reduced insulin resistance), whereas glimepiride had no effect. HOMA-S values changed 18.0% for pioglitazone and -7.9% for glimepiride (P < 0.001), QUICKI values changed a respective 0.013 and -0.007 (P < 0.001), and FSI values were -21.1 and 15.1 pmol/L (P < 0.001). Both drugs were well tolerated, with pioglitazone associated with more peripheral edema (number of treatment-emergent cases: 35/121 [28.9%] vs 17/123 [13.8%]; (P = 0.005) and fewer hypoglycemic episodes (19 [15.7%] vs 38 [30.9%]; P = 0.024). The incidence of weight gain was not significantly different between treatment groups. Conclusions: These data suggest that long-term treatment with pioglitazone enhances insulin sensitivity relative to glimepiride in Mexican patients with type 2 diabetes and that pioglitazone may have a more sustained antihyperglycernic effect. Copyright (C) 2004 Excerpta Medica, Inc MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 14 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0149-2918 UR - ISI:000221891700005 L2 - insulin resistance;hyperglycemia;glycemic control;type 2 diabetes mellitus;pioglitazone;glimepiride;FAT DISTRIBUTION; DOSE-RESPONSE; SULFONYLUREA; IMPROVES; THIAZOLIDINEDIONES; GLIBENCLAMIDE; COMPLICATIONS; HYDROCHLORIDE; DYSLIPIDEMIA; HYPOGLYCEMIA SO - Clinical Therapeutics 2004 ;26(5):680-693 12577 UI - 5191 AU - Tanchot C AU - Vasseur F AU - Pontoux C AU - Garcia C AU - Sarukhan A AD - CHU Necker, INSERM, Unite 591, F-75015 Paris, FranceSarukhan, A, Univ Nacl Autonoma Mexico, Dept Immunol, Inst Invest Biomed, Mexico City 04510, DF, Mexico TI - Immune regulation by self-reactive T cells is antigen specific AB - Immune regulation plays an important role in the establishment and maintenance of self-tolerance. Nevertheless, it has been difficult to conclude whether regulation is Ag specific because studies have focused on polyclonal populations of regulatory T cells. We have used in this study a murine transgenic model that generates self-reactive, regulatory T cells of known Ag specificity to determine their capacity to suppress naive T cells specific for other Ags. We show that these regulatory cells can regulate the responses of naive T cells with the same TCR specificity, but do not inhibit T cell proliferation or differentiation of naive T cells specific for other Ags. These results demonstrate that immune regulation may be more Ag specific than previously proposed MH - France MH - Mexico|Distrito Federal PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 29 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000222072900035 L2 - IN-VIVO; THYMIC SELECTION; AUTOIMMUNE ENCEPHALOMYELITIS; EFFECTOR FUNCTION; TOLERANCE; SUPPRESSION; EPITHELIUM; INDUCTION; RESPONSES; RECEPTOR SO - Journal of Immunology 2004 ;172(7):4285-4291 12578 UI - 3643 AU - Tapia-Salazar M AU - Cruz-Suarez LE AU - Ricque-Marie D AU - Pike IH AU - Smith TK AU - Harris A AU - Nygard E AU - Opstvedt J AD - Univ Autonoma Nuevo Leon, Programa Maricultura, Fac Ciencias Biol, San Nicolas de los Garza 66450, Nuevo Leon, MexicoInt Fishmeal & Fish Oil Org, St Albans AL3 4PA, Herts, EnglandUniv Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaNorwegian Inst Fisheries & Aquaculture Res, Dept SSF, N-5141 Bergen, NorwayRicque-Marie, D, Univ Autonoma Nuevo Leon, Programa Maricultura, Fac Ciencias Biol, Apdo Post F-56, San Nicolas de los Garza 66450, Nuevo Leon, Mexico TI - Effect of fishmeal made from stale versus fresh herring and of added crystalline biogenic amines on growth and survival of blue shrimp Litopenaeus stylirostris fed practical diets AB - Six experimental diets were fed to satiety to juvenile Litopenaeus stylirostris (77-mg initial weight) in a 28-day feeding trial with 5 replicates per treatment and 15 shrimp per replicate. Diet 1 contained a fishmeal manufactured from fresh herring and diet 2 from stale herring of the same catch. Diets 3, 4. 5 and 6 contained the fresh herring, meal but were supplemented with cadaverine (C) + histamine (H) + putrescine (P) + tyramine (T), CPT. UPT and CH. respectively, to obtain total biogenic amine concentrations similar to diet 2 but in different combinations. Survival, feed consumption and final biomass were significantly lower for the shrimp fed with the stale fishmeal. Individual weight and weight gain were significantly lower only with respect to diet 6 (supplemented with cadaverine and histamine). Feed conversion ratio was not affected by this fishmeal. The addition of amines to the fresh fishmeal had no effect on these parameters, except for diet 6. which displayed higher feed consumption, wet weight and final biomass. Poly amine concentrations of the hepatopancreas and remaining whole body were also measured at the end of the feeding trial. No significant differences were found for the different concentrations in the tissues, though cadaverine tended to be higher in the hepatopancreas of shrimp fed with the stale fishmeal and fed with the diets containing elevated levels of cadaverine, while spermidine tended to be higher in the hepatopancreas of shrimp, fed with diets containing combinations of H, P and T. The results suggest that fishmeal made from stale fish contains a factor or factors which are toxic to L. stylirostris, but that these factors are not biogenic amines, which appear not to have adverse effects on shrimp at the levels found in moderately stale fishmeal. However, the content of biogenic amines remains a good indicator of raw material spoilage, serving as a good quality criterion for fishmeal. (C) 2004 Elsevier B.V. All rights reserved MH - Canada MH - United Kingdom MH - Mexico|Guanajuato MH - Mexico|Nuevo Leon MH - Norway PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000225916000032 L2 - nutritional value;fishmeal;biogenic amines;Litopenaeus stylirostris;Crustacea;RAW-MATERIAL FRESHNESS; POLYAMINE METABOLISM; RAINBOW-TROUT; TEMPERATURE; PUTRESCINE; HISTAMINE; TOXICITY; EROSION; CHICKS SO - Aquaculture 2004 ;242(1-4):437-453 12579 UI - 4729 AU - Tapia-Salazar M AU - Smith TK AU - Harris A AU - Cruz-Suarez LE AU - Ricque-Marie D AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Programa Maricultura, San Nicolas de los Garza 66450, Nuevo Leon, MexicoUniv Guelph, Dept Anim & Poultry Sci, Guelph, ON N1G 2W1, CanadaCruz-Suarez, LE, Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Programa Maricultura, Cd Univ,Apdo Postal F-56, San Nicolas de los Garza 66450, Nuevo Leon, Mexico TI - Response of blue shrimp Litopenaeus stylirostris (Perez-Farfante & Kensley, 1997) to dietary cadaverine supplementation AB - Recent studies on salmon and shrimp have shown that reduced feed intake and growth caused by the consumption of low-quality fish meals, manufactured from spoiled fish, were not due to the presence of biogenic amines. Moreover, an improvement in weight gain was seen in blue shrimp fed a diet supplemented with cadaverine plus histamine. It was not clear, however, if this effect was due to the consumption of histamine or cadaverine. The objective of the current experiment was to investigate the effect of dietary cadaverine supplementation on growth parameters and various amine concentrations in tissues of the blue shrimp Litopenaeus stylirostris. Six experimental diets were supplemented with cadaverine at 0, 500, 1100, 2300, 3500 and 4600 mg kg(-1) and tested in a feeding trial lasting 28 days. Feed consumption, feed conversion ratio, survival and weight gain were not affected by the concentration of dietary cadaverine. The dietary supplementation of cadaverine, however, resulted in a linear increase in cadaverine concentration in shrimp tissues, especially in the hepatopancreas. It was concluded that dietary cadaverine does not have any effect on growth and feed intake of shrimp. Growth promotion, as reported previously in shrimp fed a diet supplemented with histamine plus cadaverine, was probably due to histamine or a combined effect of histamine plus cadaverine but not due to dietary cadaverine alone. It seems that shrimp have a limited ability to metabolize cadaverine, which then accumulates intact in shrimp tissues MH - Canada MH - Mexico|Nuevo Leon PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Fisheries U5 - J;Article AV - English IS - 1355-557X UR - ISI:000223283500009 L2 - penaeid shrimp;dietary cadaverine;raw material freshness;fish meal;RAW-MATERIAL FRESHNESS; FISH-MEAL; RAINBOW-TROUT; GROWTH; POLYAMINE; DERIVATIVES; HISTAMINE; TOXICITY; EROSION; QUALITY SO - Aquaculture Research 2004 ;35(11):1092-1098 12580 UI - 5685 AU - Tapia DF AU - Thomas G AU - Murguia MC AD - ITESM, Monterrey Inst Technol, Chihuahua, MexicoUniv Manitoba, Winnipeg, MB R3T 2N2, CanadaChihuahua Inst Technol, Chihuahua, MexicoTapia, DF, ITESM, Monterrey Inst Technol, Chihuahua, Mexico TI - Wavelet-based interpolation algorithm for MRI images AB - Three-dimensional (3D) visualization is a common tool that is used to make a correct diagnostic in medicine. However, in most medical data acquisition systems the information is obtained in a two-dimensional (2D) form. In this paper, an interpolation algorithm that works with a set of 2D images to create a reliable 3D model of a desired part of the body is presented. In most cases, the popular interpolation methods produce noticeable smoothing in the data generated that may cause the loss of important details. It is also important to perform noise reduction from the images that will serve as reference points to the interpolation. In order to deal with these two problems, we propose the use of the wavelet transform. One of the principal characteristics of the wavelet transform is the space-frequency decomposition that can be used to differentiate between the high detail areas and the smooth ones. The proposed approach then decompose the reference images into desired wavelet level to perform the analysis. Afterwards, the approximation coefficients are used to define the location of the interpolation area. The wavelet coefficients related to high frequency (vertical, horizontal, and diagonal) are used to locate the detail areas mentioned above. It is important to note that this is achieved by the use of a dynamic thresholding method that varies with the wavelet level and type of coefficients. Finally. we apply a linear or cubic spline interpolation depending on the number of reference images. (C) 2003 Elseviet B.V. All rights reserved MH - Canada MH - Mexico|Chihuahua PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221010500059 L2 - nuclear resonances SO - Journal of Alloys and Compounds 2004 ;369(1-2):239-243 12581 UI - 4482 AU - Tapia FJ AU - Pineda J AU - Ocampo-Torres FJ AU - Fuchs HL AU - Parnell PE AU - Montero P AU - Ramos S AD - Woods Hole Oceanog Inst, Biol Dept MS 34, Woods Hole, MA 02543, USACtr Invest Cientifica & Educ Super Ensenada, Dept Oceanog Fis, Enschede 22860, MexicoScripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093, USAUniv Mar, Ctr Ciencias & Ecol Aplicada, Valparaiso, ChileTapia, FJ, Woods Hole Oceanog Inst, Biol Dept MS 34, Woods Hole, MA 02543 USA TI - High-frequency observations of wind-forced onshore transport at a coastal site in Baja California AB - We investigated the effect of the daily sea breeze on the surface flow at Bahia Salsipuedes, Baja California, Mexico. Drifter-tracking experiments were conducted over a 2-week period in July, 1999. Surface drifters were deployed daily and their trajectories tracked from a small boat for 3-7 h. Wind speed and direction, as well as the vertical distribution of temperature and current velocities were measured throughout the observation period. Our results indicate that strong winds associated with the daily sea breeze at the study area can produce onshore surface currents with velocities of up to 10 cm s(-1) (net transport of up to 2 km in a diurnal cycle). There was a hyperbolic relationship between onshore wind stress and net onshore transport of the drifters. A decrease in stratification and more consistent pattern of onshore transport were associated with sustained winds > 6 in s(-1) towards the end of the study. Progressive vector diagrams computed from near-surface currents failed to predict the trajectory of drifters, especially on days where wind forcing was more consistent in terms of direction and magnitude. We discuss the implications of these results regarding the collection of settlement data and their interpretation in terms of larval supply to coastal populations. (C) 2004 Elsevier Ltd. All rights reserved MH - USA MH - Chile MH - Mexico|Baja California PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Oceanography U5 - J;Article AV - English IS - 0278-4343 UR - ISI:000223734900010 L2 - sea breeze;onshore transport;drifters;neuston;Baja California;BARNACLE SEMIBALANUS-BALANOIDES; CROSS-SHELF TRANSPORT; SETTLEMENT-PATTERNS; SOUTHERN-CALIFORNIA; LARVAL SETTLEMENT; CRAB SETTLEMENT; DISPERSAL; CURRENTS; RECRUITMENT; FRONTS SO - Continental Shelf Research 2004 ;24(13-14):1573-1585 12582 UI - 4441 AU - Tapia JL AU - Pacheco J AU - Pacheco M AU - Zissis C AU - Gonzales JJ AD - Inst Tecnol Toluca, Mexico City, DF, Mexico. Inst Nacl Invest Nucl, Mexico City 11801, DF, Mexico. Ctr Phys Plasmas & Applicat Toulouse, Toulouse, France TI - Arc discharge model as a two terminal electronic device AB - Based in an AC current stable discharge and. their energy balance equation for plasma under local thermal equilibrium (LTE), a simple high-intensity discharge (HID) model has been developed. The effects of energy dissipation caused by conduction and radiation are also considered. The particular aim of this model is that can be used as a two terminal device, which provides a powerful tool for simulating the electrical behavior of some HID, like electric arcs or lamps. The model can predict the behavior of the electrical discharge at low and high frequency operation and can be used for optimizing the electrical coupling between high frequency resonant converters and the electrical discharge. Some results are also presented, comparing the theoretical behavior (based in Spitzer's free path theory) with respect to different data bases and some experimental results. A good agreement of this result is obtained MH - France MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico T3 - LIGHT SOURCES 2004Institute of physics conference series PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U4 - Physics, Multidisciplinary U5 - S;Article NT - SEnglishArticle0DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLANDINSTIT PHYS CONFER SERBAU82 AV - English IS - 0951-3248 UR - ISI:000223655300180 SO - 2004 ;(182):473-474 12583 UI - 5974 AU - Tapia JL AU - Aguirre A AU - Garvey M AU - Zeid M AD - SUNY Buffalo, Sch Dent Med, Dept Oral Diag Sci, Adv Oral & Maxillofacial Pathol Training Program, Buffalo, NY 14214, USANatl Autonomous Univ Mexico, Fac Odontol, Mexico City 04510, DF, MexicoSisters Hosp, Div Oral Maxillofacial Surg, Buffalo, NY, USASUNY Buffalo, Dept Surg Pathol, Buffalo, NY 14214, USASUNY Buffalo, Sch Med, Dept Pathol, Buffalo, NY 14214, USAAguirre, A, SUNY Buffalo, Sch Dent Med, Dept Oral Diag Sci, Adv Oral & Maxillofacial Pathol Training Program, 355 Squire Hall, Buffalo, NY 14214 USA TI - Mandibular unilocular radiolucency with ill-defined borders MH - USA MH - Mexico|Distrito Federal PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Editorial Material AV - English IS - 1079-2104 UR - ISI:000220238000005 L2 - CENTRAL MUCOEPIDERMOID CARCINOMA; SALIVARY-GLAND TUMORS; ODONTOGENIC CYSTS; JAWS; OSTEOMYELITIS; MOUTH SO - Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontics 2004 ;97(3):301-306 12584 UI - 5780 AU - Tauer A AU - Elss S AU - Frischmann M AU - Tellez P AU - Pischetsrieder M AD - Univ Erlangen Nurnberg, Inst Pharm & Food Chem, D-91052 Erlangen, GermanyCtr Invest & Asistencia Tecnol & Diseno Estado Ja, Guadalajara, Jalisco, MexicoPischetsrieder, M, Univ Erlangen Nurnberg, Inst Pharm & Food Chem, Schuhstr 19, D-91052 Erlangen, Germany TI - Influence of thermally processed carbohydrate/amino acid mixtures on the fermentation by Saccharomyces cerevisiae AB - The production of alcoholic beverages such as Tequila, Mezcal, whiskey, or beer includes the fermentation of a mash containing Maillard reaction products. Because excessive heating of the mash can lead to complications during the following fermentation step, the impact of Maillard products on the metabolism of Saccharomyces cerevisiae was investigated. For this purpose, fermentation was carried out in a model system in the presence and absence of Maillard reaction products and formation of ethanol served as a marker for the progression of fermentation. We found that increasing amounts of Maillard products reduced the formation of ethanol up to 80%. This effect was dependent on the pH value during the Maillard reaction, reaction time, as well as the carbohydrate and amino acid component used for the generation of Maillard reaction products. Another important factor is the pH value during fermentation: The inhibitory effect of Maillard products was not detectable at a pH of 4 and increased with higher pH-values. These findings might be of relevance for the production of above-mentioned beverages MH - Germany MH - Mexico|Jalisco PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000220636900040 L2 - Maillard reaction;nonenzymatic browning;yeast;Saccharomyces cerevisiae;fermentation;beer;Tequila;Mezcal;whiskey;REACTION-PRODUCTS; DEGRADATION SO - Journal of Agricultural and Food Chemistry 2004 ;52(7):2042-2046 12585 UI - 4484 AU - Tavares-Sanchez OL AU - Gomez-Anduro GA AU - Felipe-Ortega X AU - Islas-Osuna MA AU - Sotelo-Mundo RR AU - Barillas-Mury C AU - Yepiz-Plascencia G AD - Ctr Invest Alimentac & Desarrollo, Aquat Mol Biol Lab, Hermosillo 83000, Sonora, MexicoInst Tecnol Sonora, Cd Obregon Son 85000, MexicoNIH, Lab Malaria & Vector Res, Bethesda, MD 20892, USAYepiz-Plascencia, G, Ctr Invest Alimentac & Desarrollo, Aquat Mol Biol Lab, POB 1735, Hermosillo 83000, Sonora, Mexico TI - Catalase from the white shrimp Penaeus (Litopenaeus) vannamei: molecular cloning and protein detection AB - Catalase is an antioxidant enzyme that plays a very important role in the protection against oxidative damage by breaking down hydrogen peroxide. It is a very highly conserved enzyme that has been identified from numerous species including bacteria, fungi, plants and animals, but the information about catalase in crustaceans is very limited. A cDNA containing the complete coding sequence for catalase from the shrimp Penaeus (Litopenaeus) vannamei was sequenced and the mRNA was detected by RT-PCR in selected tissues. Catalase was detected in hepatopancreas crude extracts by Western blot analysis with anti-human catalase polyclonal antibodies. The nucleotide sequence is 1692 bp long, including a 72-bp 5'-UTR, a coding sequence of 1515 bp and a 104-bp 3'-UTR. The deduced amino acid sequence corresponds to 505 amino acids with high identity to invertebrate, vertebrate and even bacterial catalases and contains the catalytic residues His71, Asn144, and Tyr354. The predicted protein has a calculated molecular mass of 57 kDa; which coincides with the size of the subunit (similar to55 kDa) and the tetrameric protein(similar to230 kDa) detected in hepatopancreas extracts under native conditions. Catalase mRNA level was higher in hepatopancreas, followed by gills and was not detected in muscle. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Sonora MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Zoology U5 - J;Article AV - English IS - 1096-4959 UR - ISI:000223823400003 L2 - catalase;cDNA;hepatopancreas;mRNA;shrimp;FRESH-WATER PRAWN; DROSOPHILA-MELANOGASTER; ANTIOXIDANT ENZYMES; ACATALASEMIC MUTANTS; BINDING-PROTEIN; DEFENSE SYSTEM; LIPOPROTEIN; PREDICTION; ALIGNMENT; OXIDATION SO - Comparative Biochemistry and Physiology B-Biochemistry & Molecular Biology 2004 ;138(4):331-337 12586 UI - 5189 AU - Tchijov V AU - Ayala RB AU - Leon GC AU - Nagornov O AD - UNAM, Ctr Invest Teor, Fac Estudios Super Cuautitlan, Mexico City 54700, DF, MexicoState Univ, Moscow Engn Phys Inst, Moscow 115409, RussiaTchijov, V, UNAM, Ctr Invest Teor, Fac Estudios Super Cuautitlan, Av 1 de Mayo S-N,Edif A-1 Cuautitlan Izcalli, Mexico City 54700, DF, Mexico TI - Thermodynamics of high-pressure ice polymorphs: ices III and V AB - Thermodynamic properties of high-pressure ice polymorphs, ices III and V, are studied theoretically. The results of TIP4P molecular dynamics simulations in the NPT ensemble are used to calculate the temperature dependence of the specific volume of ices III and V at pressures 0.25 and 0.5 GPa, respectively. New P-V-T equations of state of ices III and V are derived using a method generalizing the one proposed by Fei et al. [J. Chem. Phys. 99 (1993) 5369], and new results concerning the equilibrium phase transitions ice III-water and ice V-water are presented. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0022-3697 UR - ISI:000221982100010 L2 - thermodynamic properties;phase transitions;high pressure;ORDINARY WATER SUBSTANCE; BRILLOUIN SPECTROSCOPY; FUNDAMENTAL EQUATION; ELASTIC-CONSTANTS; PHASE-TRANSITIONS; LIQUID WATER; SHOCK-WAVE; STATE; H2O; STABILITY SO - Journal of Physics and Chemistry of Solids 2004 ;65(7):1277-1283 12587 UI - 4870 AU - Tejel C AU - Ciriano MA AU - Rios-Moreno G AU - Dobrinovitch IT AU - Lahoz FJ AU - Oro LA AU - Parra-Hake M AD - Univ Zaragoza, CSIC, Dept Quim Inorgan, Inst Ciencia Mat Aragon, E-50009 Zaragoza, SpainInst Tecnol Tijuana, Ctr Grad & Invest, Tijuana 22510, Baja California, MexicoTejel, C, Univ Zaragoza, CSIC, Dept Quim Inorgan, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain TI - Crescent-shaped rhodium(I) complexes with bis(o-carboxymethylphenyl)triazenide AB - Reaction of [{Rh(mu-Cl)(CO)(2)}(2)] with the triazene ArNNNHAr (Ar = o-CO2MeC6H4) produced the mononuclear complex [RhCl(ArNNNHAr)(CO)(2)] (1). Complex 1 reacted with KOH in methanol to give the dinuclear compound [{Rh(mu-ArNNNAr)(CO)(2)}(2)] (2), which showed a "mu-(1kappaN(1),2kappaN(3))-ArNNNAr" coordination mode for both bridging ligands. The dinuclear complex [{Rh(mu-ArNNNAr)(CO)(2)}(2)] (2) easily undergoes redistribution reactions in which the eight-membered "Rh-2(NNN)(2)" core is broken. Thus, reaction of 2 with the anionic complex (NHEt3)[RhCl2(CO)(2)] gave the single-bridged complex (NHEt3)[Rh-2(mu-ArNNNAr)Cl-2(CO)(4)] (4), while the trinuclear complexes [Rh-3(mu-ArNNNAr)(mu-Cl)(mu-CO)Cl(CO)(4)] (5) and [Rh-3(mu-ArNNNAr)(2)(mu-Cl)(mu-CO)(CO)(3)] (6) were isolated by addition of the neutral compound [{Rh(mu-Cl)(CO)(2)}(2)] to 2, depending on the molar ratio employed. The formation of 5 and 6 involved the loss of carbonyl groups and the coordination of the oxygen atoms of the CO2Me groups. The structures of 4, 5, and 6 have been determined by X-ray diffraction methods, which show the ability of bis(o-carboxymethylphenyl)-triazenide to act as bi-, tri-, and tetra-dentate ligand-spanning dinuclear moieties in trinuclear complexes MH - Mexico|Baja California MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0020-1669 UR - ISI:000222846300031 L2 - X-RAY CRYSTAL; ORGANOTRANSITION-METAL COMPLEXES; REDUCTION-OXIDATION PROPERTIES; FACE-TO-FACE; BRIDGED COMPLEXES; BIPYRIDYL COMPLEXES; DIRHODIUM COMPLEXES; MOLECULAR-STRUCTURE; CARBONYL-COMPLEXES; 4+ CORES SO - Inorganic Chemistry 2004 ;43(15):4719-4726 12588 UI - 6555 AU - Tella JL AU - Figuerola J AU - Negro JJ AU - Blanco G AU - Rodriguez-Estrella R AU - Forero MG AU - Blazquez MC AU - Green AJ AU - Hiraldo F AD - CSIC, Estac Biol Donana, Dept Appl Biol, Seville 41013, SpainCSIC, Inst Invest Recursos Cineget, Ciudad Real, SpainCtr Invest Biol Noroeste, El Comitan, La Paz, MexicoUIB, CSIC, Inst Mediterraneo Estudios Avanzados, Mallorca, SpainTella, JL, CSIC, Estac Biol Donana, Dept Appl Biol, Avda Maria Luisa S-N, Seville 41013, Spain TI - Ecological, morphological and phylogenetic correlates of interspecific variation in plasma carotenoid concentration in birds AB - Carotenoids are important as pigments for bright coloration of animals, and as physiologically active compounds with a wide array of health-related benefits. However, the causes of variation in carotenoid acquisition and physiology among species are poorly known. We measured the concentration of carotenoids in the blood of 80 wild bird species differing in diet, body size and the extent of carotenoid-based traits. Preliminary analyses showed that diet significantly explains interspecific variability in plasma carotenoids. However, dietary influences were apparently overridden by phylogenetic relationships among species, which explained most (65%) of this variability. This phylogenetic effect could be due partly to its covariation with diet, but may also be caused by interspecific differences in carotenoid absorption from food to the blood stream, mediated, for example by endothelial carriers or gut parasites. Carotenoid concentrations also decreased with body size (which may be explained by the allometric relationship between ingestion rate and body mass), and correlated positively with the extent of carotenoid-dependent coloration of plumage and bare parts. Therefore, the acquisition of carotenoids from the diet and their use for both health and display functions seem to be constrained by ecological and physiological aspects linked to the phylogeny and size of the species MH - Mexico|Baja California Sur MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 21 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1010-061X UR - ISI:000187891700017 L2 - birds;body size;carotenoids;coloration;diet;phylogeny;PLUMAGE COLORATION; SEXUAL SELECTION; HOUSE FINCH; ORNAMENTAL COLORATION; DIETARY CAROTENOIDS; EIMERIA-ACERVULINA; EMBERIZA-CIRLUS; PARASITES; SIGNALS; BLOOD SO - Journal of Evolutionary Biology 2004 ;17(1):156-164 12589 UI - 5338 AU - Tellez-Luis SJ AU - Ramirez JA AU - Vazquez M AD - Univ Autonoma Tamaulipas, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, E-27002 Lugo, SpainVazquez, M, Univ Autonoma Tamaulipas, Dept Food Sci & Technol, Apdo Postal 1015, Reynosa 88700, Tamaulipas, Mexico TI - Production of transglutaminase by Streptoverticillium ladakanum NRRL-3191 using glycerol as carbon source AB - The enzyme transglutaminase (TG) catalyses the formation of covalent bonds between adjacent proteins, thereby improving the gel structure of proteins and has important applications for the food industry. The aims of this work were: (i) to elucidate the effect of agitation speed during the biotechnological production of TG by Streptoverticillium ladakanum NRRL-3191 using glycerol as carbon source; and (ii) to improve TG production by optimising the composition of media based on glycerol, xylose and casein. An agitation speed of 250 rpm and a fermentation time of 72 h resulted in the optimal enzymatic activity (0.628 U/mL) with a productivity of 0.087 U/(mL.h). The composition of media with glycerol, xylose and casein were optimised using an experimental design to improve TG production. The model predicts that the maximum TG activity (0.725 U/mL) can be obtained using glycerol 50.5 g/L and casein 20 g/L without the addition of xylose MH - Mexico|Tamaulipas MH - Spain PB - ZAGREB: FACULTY FOOD TECHNOLOGY BIOTECHNOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 1330-9862 UR - ISI:000221787800001 L2 - transglutaminase;glycerol;casein;Streptoverticillium ladakanum;RESPONSE-SURFACE METHODOLOGY; MICROBIAL TRANSGLUTAMINASE; MOBARAENSE; OPTIMIZATION; MICROORGANISMS; PURIFICATION; PROTEINS SO - Food Technology and Biotechnology 2004 ;42(2):75-81 12590 UI - 5891 AU - Tellez-Luis SJ AU - Gonzalez-Cabriales JJ AU - Ramirez JA AU - Vazquez M AD - Univ Santiago de Compostela, Area Tecnol Alimentos, Dept Quim Analit, Escuela Politecn Super, E-27002 Lugo, SpainUniv Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Tamaulipas 88700, MexicoVazquez, M, Univ Santiago de Compostela, Area Tecnol Alimentos, Dept Quim Analit, Escuela Politecn Super, Campus Lugo, E-27002 Lugo, Spain TI - Production of transglutaminase by Streptoverticillium ladakanum NRRL-3191 grown on media made from hydrolysates of sorghum straw AB - The aim of this work was to elucidate the suitability of the biotechnological production of transglutaminase by Streptoverticillium ladakanum NRRL-3191 grown on media made from hydrolysates of sorghum straw. Transglutaminase activity was determined in fermentations on sorghum straw hydrolysates and commercial xylose with initial xylose 10, 20 or 30 g/L. Using media containing commercial xylose 20 g/L, transglutaminase activity up to 0.282 U/mL was obtained in 96 h. Using neutralized, charcoal-treated hydrolysates of sorghum straw with xylose 30 g/L sterilized in autoclave at 121 degreesC, up to 0.155 U/mL was obtained in 96 h. However, when the sterilization was performed by filtration, using the same hydrolysates with xylose 20 g/L, up to 0.348 U/mL was obtained in 72 h. It was demonstrated that hydrolysates of sorghum straw are suitable media for transglutaminase production by Streptoverticillium ladakanum MH - Mexico|Tamaulipas MH - Spain PB - ZAGREB: FACULTY FOOD TECHNOLOGY BIOTECHNOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Food Science & Technology U5 - J;Article AV - English IS - 1330-9862 UR - ISI:000220470100001 L2 - transglutaminase;sorghum;hydrolysates;Streptoverticillium ladakanum;MICROBIAL TRANSGLUTAMINASE; MOBARAENSE; ACID SO - Food Technology and Biotechnology 2004 ;42(1):1-4 12591 UI - 6048 AU - Tellez-Luis SJ AU - Ramirez JA AU - Vazquez M AD - Univ Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainVazquez, M, Univ Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Apdo Postal 1015, Reynosa 88700, Tamaulipas, Mexico TI - Application in restructured fish products of transglutaminase obtained by Strepto verticillum ladakanaum in media made from hydrolysates of sorghum straw AB - The efficiency of microbial transglutaminase (MTG), obtained by Streptoverticillum ladakanaum in the fermentation of sorghum straw hydrolysates to increase mechanical properties of restructured fish products, was evaluated. Fish gels were obtained from Mexican flounder (Cyclopsetta chittendenni) by (1) adding MTG obtained in the fermentation of sorghum straw hydrolysates (SMTG) at 0.3 units/g; (2) adding commercial MTG (CMTG) at 0.3 units/g; (3) adding 0.4% calcium chloride to activate the endogenous TG; and (4) without additives as control sample. SMTG more efficiently increased the mechanical properties of restructured products and induced a low value of expressible water, similar to the control (6% to 7%). Results demonstrated the feasibility of producing an efficient MTG from agricultural wastes MH - Mexico|Tamaulipas MH - Spain PB - CHICAGO: INST FOOD TECHNOLOGISTS RP - NOT IN FILE U3 - TC 1 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0022-1147 UR - ISI:000220142100038 L2 - fish;transglutaminase;microbial;restructured;sorghum;MICROBIAL TRANSGLUTAMINASE; SURIMI GELS; ACID; OPTIMIZATION; SALT SO - Journal of Food Science 2004 ;69(1):M1-M5 12592 UI - 3283 AU - Tellez-Rojo MM AU - Ettinger AS AU - Lamadridl H AU - Bellinger D AU - Schnaas L AU - Smith D AU - Hu H AU - Hernandez-Avila M AD - Natl Inst Publ Hlth, Mexico City, DF, MexicoHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USAUniv Calif Santa Cruz, Santa Cruz, CA 95064, USA TI - Effect of maternal plasma lead levels during pregnancy on infant neurocognitive development at age 24 months MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Neurosciences;Pharmacology & Pharmacy;Toxicology U5 - J;Meeting Abstract AV - English IS - 0161-813X UR - ISI:000222121900170 SO - Neurotoxicology 2004 ;25(4):723-724 12593 UI - 4418 AU - Tellez-Rojo MM AU - Hernandez-Avila M AU - Lamadrid-Figueroa H AU - Smith D AU - Hernandez-Cadena L AU - Mercado A AU - Aro A AU - Schwartz J AU - Hu H AD - Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Cuernavaca 62508, Morelos, MexicoUniv Calif Santa Cruz, Dept Environm Toxicol, Santa Cruz, CA 95064, USAHarvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115, USAHarvard Univ, Sch Publ Hlth, Dept Environm Hlth, Boston, MA 02115, USATellez-Rojo, MM, Inst Nacl Salud Publ, Ctr Invest Salud Poblac, Av Univ 655,Col Sta Ma Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Impact of bone lead and bone resorption on plasma and whole blood lead levels during pregnancy AB - The authors tested the hypotheses that maternal bone lead burden is associated with increasing maternal whole blood and plasma lead levels over the course of pregnancy and that this association is modified by rates of maternal bone resorption. A total of 193 Mexican women were evaluated (1997-1999) in the first, second, and third trimesters of pregnancy. Whole blood lead and plasma lead levels were measured in each trimester. Urine was analyzed for cross-linked N-telopeptides (NTx) of type I collagen, a biomarker of bone resorption. Patella and tibia lead levels were measured at 4 weeks postpartum. The relation between whole blood, plasma, and bone lead and NTx was assessed using mixed models. Plasma lead concentrations followed a U-shape, while NTx levels increased significantly during pregnancy. In a multivariate model, the authors observed a significant and positive interaction between NTx and bone lead when plasma lead was used as the outcome variable. Dietary calcium intake was inversely associated with plasma lead. Results for whole blood lead were similar but less pronounced. These results confirm previous evidence that bone resorption increases during pregnancy, with a consequential significant release of lead from bone, constituting an endogenous source of prenatal exposure. They also provide a rationale for testing strategies (e.g., nutritional supplementation with calcium) aimed at decreasing prenatal lead exposure MH - Mexico|Morelos MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 10 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0002-9262 UR - ISI:000224083700008 L2 - bone resorption;lead;longitudinal studies;pregnancy;FOOD FREQUENCY QUESTIONNAIRE; CALCIUM HOMEOSTASIS; BIOCHEMICAL MARKERS; MATERNAL SKELETON; PRENATAL EXPOSURE; DENSITY CHANGES; MEXICO-CITY; I COLLAGEN; LACTATION; METABOLISM SO - American Journal of Epidemiology 2004 ;160(7):668-678 12594 UI - 4589 AU - Tellez-Valencia A AU - Olivares-Illana V AU - Hernandez-Santoyo A AU - Perez-Montfort R AU - Costas M AU - Rodriguez-Romero A AU - Lopez-Calahorra F AU - de Gomez-Puyou MT AU - Gomez-Puyou A AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, MexicoUniv Autonoma Estado Hidalgo, Inst Ciencias Salud, Area Acad Farm, Tilcuautla 42160, Hidalgo, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Dept Bioquim, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Lab Univ Estruct Prot, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Fac Quim, Dept Fisicoquim, Lab Termofis, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Quim Organ, Barcelona 08028, SpainGomez-Puyou, A, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Mexico City 04510, DF, Mexico TI - Inactivation of triosephosphate isomerase from Trypanosoma cruzi by an agent that perturbs its dimer interface AB - We characterized by crystallographic, calorimetric and biochemical methods the action of a low molecular weight compound, 3-(2-benzothiazolylthio)-1-propanesulfonic acid (compound 8) that binds to the dimer interface of triosephosphate isomerase from Trypanosoma cruzi (TcTIM) and thereby abolishes its function with a high level of selectivity. The kinetics of TcTIM inactivation by the agent and isothermal titration calorimetry experiments showed that the binding of two molecules of the compound per enzyme is needed for inactivation. The binding of the first molecule is endothermic, and that of the second exothermic. Crystals of TcTIM in complex with one molecule of the inactivating agent that diffracted to a resolution of 2 Angstrom were obtained. The compound is at the dimer interface at less than 4 Angstrom from residues of the two subunits. Compound 8 is more effective at low than at high protein concentrations, indicating that it perturbs the association between the two TcTIM monomers. Calorimetric and kinetic data of experiments in which TcTIM was added to a solution of the inactivating agent showed that at low concentrations of the compound, inactivation is limited by binding, whereas at high concentrations of the agent, the events that follow binding become rate-limiting. The portion of the interface of TcTIM that binds the benzothiazole derivative and its equivalent region in human TIM differs in amino acid composition and hydrophobic packing. Thus, we show that by focusing on protein-protein interfaces, it is possible to discover low molecular weight compounds that are selective for enzymes from parasites. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Hidalgo MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0022-2836 UR - ISI:000223480000017 L2 - interface perturbers;protein-protein interfaces;triosephosphate isomerase;benzothiazole;Trypanosoma cruzi;TRIOSE-PHOSPHATE ISOMERASE; SPECIES-SPECIFIC INHIBITION; PLASMODIUM-FALCIPARUM; CRYSTAL-STRUCTURE; AMINO-ACIDS; DRUG DESIGN; PROTEIN; STABILITY; ENZYME; TIM SO - Journal of Molecular Biology 2004 ;341(5):1355-1365 12595 UI - 2952 AU - Tellez-Zenteno JF AU - Hernandez-Ronquillo L AU - Wiebe S AD - London Hlth Sci Ctr, Epilepsy Unit, London, ON, CanadaNatl Inst Med Sci & Nutr, Dept Neurol, Mexico City, DF, Mexico TI - Relative impact of the source of study population on the reported incidence of SUDEP: A systematic review MH - Canada MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000224420100303 SO - Epilepsia 2004 ;45():102-102 12596 UI - 2954 AU - Tellez-Zenteno JF AU - Matijevic S AU - Wiebe S AD - London Hlth Sci Ctr, Epilepsy Unit, London, ON, CanadaNatl Inst Med Sci & Nutr, Dept Neurol, Mexico City, DF, Mexico TI - National and regional prevalence of self-reported epilepsy in Canada MH - Canada MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000224420100790 SO - Epilepsia 2004 ;45():268-268 12597 UI - 3558 AU - Tellez-Zenteno JF AU - Hernandez-Ronquillo L AU - Salinas V AU - Estanol B AU - da Silva O AD - Natl Inst Med Sci & Nutr, Dept Neurol, Mexico City, DF, MexicoUniv Western Ontario, Dept Pediat, London, ON N6A 3K7, CanadaNatl Inst Perinatol, Neonatol Unit, Mexico City, DF, MexicoTellez-Zenteno, JF, Natl Inst Med Sci & Nutr, Dept Neurol, Mexico City, DF, Mexico TI - Myasthenia gravis and pregnancy: clinical implications and neonatal outcome AB - Background: The myasthenia gravis is twice as common in women as in men and frequently affects young women in the second and third decades of life, overlapping with the childbearing years. Generally, during pregnancy in one third of patients the disease exacerbates, whereas in two thirds it remains clinically unchanged. Complete remission can occur in some patients. Methods: To describe the clinical course, delivery and neonatal outcome of 18 pregnant women with the diagnosis of myasthenia gravis. Retrospective chart review of pregnant patients with myasthenia gravis, followed at the National Institute of Perinatology in Mexico City over an 8-year period. Data was abstracted from the medical records on the clinical course during pregnancy, delivery and neonatal outcome. Results: From January 1, 1996 to December 31, 2003 18 patients with myasthenia gravis were identified and included in the study. The mean+/-SD maternal age was 27.4+/-4.0 years. During pregnancy 2 women (11%) had an improvement in the clinical symptoms of myasthenia gravis, 7 women (39%) had clinical worsening of the condition of 9 other patients (50%) remained clinically unchanged. Nine patients delivered vaginally, 8 delivered by cesarean section and 1 pregnancy ended in fetal loss. Seventeen infants were born at mean+/-SD gestational age of 37.5+/-3.0 weeks and a mean birth weight of 2710+/-73 g. Only one infant presented with transient neonatal myasthenia gravis. No congenital anomalies were identified in any of the newborns. Conclusions: The clinical course of myasthenia gravis during pregnancy is variable, with a significant proportion of patients experiencing worsening of the clinical symptoms. However, neonatal transient myasthenia was uncommon in our patient population MH - Canada MH - Mexico|Distrito Federal PB - LONDON: BIOMED CENTRAL LTD RP - NOT IN FILE U3 - TC 6 U4 - Orthopedics;Rheumatology U5 - J;Article AV - English IS - 1471-2474 UR - ISI:000225994700001 L2 - NEWBORN; MOTHERS SO - Bmc Musculoskeletal Disorders 2004 ;5(): 12598 UI - 3626 AU - Tellez-Zenteno JF AU - Pondal-Sordo M AU - Matijevic S AU - Wiebe S AD - London Hlth Sci Ctr, Dept Clin Neurol Sci, London, ON, CanadaNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Neurol, Mexico City, DF, MexicoUniv Calgary, Dept Clin Neurosci, Calgary, AB, CanadaWiebe, S, Foothills Prov Gen Hosp, Div Neurol, 12th Floor Neuro,1403 29th St NW, Calgary, AB T3N 3T9, Canada TI - National and regional prevalence of self-reported epilepsy in Canada AB - Purpose: To assess the point prevalence of self-described epilepsy in the general population nationally, provincially, and in different groups of interest. Methods: We analyzed data front two national health surveys. the National Population Health Survey (NPHS, N = 49,000) and the Community Health Survey (CHS, N = 130.882). Both Surveys captured sociodemographic information, as well as age. sex. education, ethnicity, household income, and labor force status Of participants. Epilepsy was ascertained with only one question in both surveys. "Do you have epilepsy diagnosed by a health professional?" (NPHS) and "Do You have epilepsy?" (CHS). Prevalences were age-adjusted by using national standard populations at the time of each survey. Exact 95% confidence intervals were obtained. Results: In the NPHS. 241 of 49,026 subjects described themselves as having been diagnosed with epilepsy. yielding a weighted point prevalence of 5.2 per 1.000 [95% confidence interval (CI), 4.9-5.4] In the CHS. 835 of 130.822 subjects described themselves as having epilepsy, yielding a weighted point prevalence of 5.6 per 1.000 (95% Cl. 5.1-6.0). Trends in differences in prevalence among some Canadian provinces were observed. Prevalence was statistically significantly higher in groups with the lowest educational level. lowest income. and in those unemployed in the previous year. Prevalence also was higher in nonimmigrants than in immigrants. Conclusions: The overall and group-specific results are in keeping with those obtained in other developed countries by using different ascertainment method. We discuss methodologic aspects related to the ascertainment of epilepsy in both surveys. and to the validity and implications of our findings MH - Canada MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 10 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0013-9580 UR - ISI:000225762000017 L2 - prevalence;epilepsy;epidemiology;developed country;Canada;age-adjusted prevalence;DISORDERS SO - Epilepsia 2004 ;45(12):1623-1629 12599 UI - 4738 AU - Tellez CA AU - Hollauer E AU - Giannerini T AU - da Silva MIP AU - Mondragon MA AU - Rodriguez JR AU - Castano VM AD - Univ Fed Fluminense, Inst Quim, Dept Quim Fis, Niteroi Ctr, BR-24210150 Rio De Janeiro, BrazilPontificia Univ Catolica Rio de Janeiro, Dept Quim, Rio De Janeiro, BrazilUNAM, Inst Fis, Dept Fis Aplicada & Tecnol Avanzada, Queretaro 76001, Qro, MexicoTellez, CA, Univ Fed Fluminense, Inst Quim, Dept Quim Fis, Niteroi Ctr, Morro Valonguinho S-N, BR-24210150 Rio De Janeiro, Brazil TI - Fourier transform infrared and Raman spectra - Semi empirical AM1 and PM3; MP2/DZV and DFT/B3LYP-6-31G(d) ab initio calculations for dimethylterephthalate (DMT) AB - Fourier transform infrared and Raman spectra of dimethylterephthalate (DMT), as microcrystalline powder, have been investigated. The vibrational spectra were calculated using the AM1 and PM3 semi empirical procedures, and the Moller-Plesset (MP2/DZV), and the Becke-Lee, Yang and Parr gradient-corrected correlation functional: B3LYP/6-31G(d) ab initio calculations. On this basis, and assisted with the FT-IR and Raman spectra of the terephthalic acid, an assignment of the vibrational spectra of dimethylterephthalate was proposed. In the calculations, remarkable differences concerning the assignments of the vibrational spectra were noted between the AM1 and PM3 methods. Also, the ab initio procedure shows differences in interpreting the spectra compared with the semi empiric procedures, and among themselves. Calculated geometrical parameters were compared with the experimental values of dimethylterephthalate, diethylterephthalate and terephthalic acid. (C) 2003 Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Spectroscopy U5 - J;Article AV - English IS - 1386-1425 UR - ISI:000223116400062 L2 - dimethylterephthalate;Fourier transform infrared and Raman spectra;Ab initio calculations;MP2;Moller-Plesset;DFT/B3LYP/6-31G(d);AM1;PM3 methods;ELECTRON CORRELATION-ENERGY; PERTURBATION-THEORY; TEREPHTHALATE; CRYSTAL; ACID SO - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy 2004 ;60(8-9):2171-2180 12600 UI - 4020 AU - Tellez F AU - Cruz A AU - Lopez-Sandoval H AU - Ramos-Garcia I AU - Gayosso M AU - Castillo-Sierra RN AU - Paz-Michel B AU - Noth H AU - Flores-Parra A AU - Contreras R AD - IPN, Ctr Invest & Estud Avanzados, Dept Quim, Mexico City 07000, DF, MexicoIPN, Dept Quim, Unidad Profes Interdisciplinaria, Ticoman, DF, MexicoUniv Munich, Dept Chem, D-81377 Munich, GermanyContreras, R, IPN, Ctr Invest & Estud Avanzados, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico TI - Dithiocarbamates, thiocarbamic esters, dithiocarboimidates, guanidines, thioureas, isothioureas, and tetraazathiapentalene derived from 2-aminobenzothiazole AB - Reactions between CS2 and the exocyclic amino groups of 2-aminobenzothiazoles gave series of molecules bearing thiourea, isothiourea, dithiocarbamate, dithiocarboimine, dimethyldithiocarbamate, methyldithiocarbamate, S-CH3 and O-alkyl thiocarbamic ester, and guanidine groups. Preferred tautomers and conformers were determined. Most compounds present coordinative bonds between the endocyclic sulfur atom, which behaves as a Lewis acid, and oxygen, nitrogen, and sulfur acting as bases. A new dibenzothiazolyl-tetraazathiapentalene containing a T-shaped hypervalent sulfur atom and displaying "single bond-no bond resonance" is discussed. X-ray structures of eleven compounds are reported. (C) Wiley-VCH Verlag GmbH Co MH - Germany MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000224697100013 L2 - 2-aminobenzothiazole;dibenzothiazolyltetraazathiapentalene;electrophilic and nucleophilic sulfur atoms;NONBONDED ATOMIC CONTACTS; S-N BOND; DIHETEROCYCLIC COMPOUNDS; DERIVATIVES THEREOF; DIRECTIONAL PREFERENCES; ORGANIC-COMPOUNDS; FACILE SYNTHESIS; DIVALENT SULFUR; X-RAY; 2-GUANIDINOBENZIMIDAZOLE SO - European Journal of Organic Chemistry 2004 ;(20):4203-4214 12601 UI - 4151 AU - Tellez L AU - Rubio F AU - Pena-Alonso R AU - Rubio J AD - UPALM, Inst Politecn Nacl, ESIQIE, Dept Min & Met, San Pedro Zacatenco, MexicoCSIC, Inst Ceram & Vidrio, Dept Quim Fis Superficies & Proc, E-28049 Madrid, SpainTellez, L, UPALM, Inst Politecn Nacl, ESIQIE, Dept Min & Met, San Pedro Zacatenco, Mexico TI - FT-IR spectroscopy study of the reaction of obtention of hybrid materials AB - Hybrid materials have been prepared in this work through the reactions of Si and Ti alkoxides (TEOS and TBT, respectively) and polydimethil siloxane (PDMS). These reactions have been studied by means of FT-IR spectroscopy during the whole reaction time. The hydrolysis of TEOS molecule has been followed by the 880 cm(-1) band, and the self-condensation reactions through the 1180 and 1150 cm(-1) bands. Polycondesation reaction between Si-OH groups and PDMS molecules has been followed by the 850 cm(-1) band. On the other hand, the hydrolysis reaction of TBT and the self-condensation of Ti-OH groups have been followed by the 1130 and 770-510 cm(-1) bands, respectively. Finally the condensation reaction between Si-OH and Ti-OH groups have been studied by the 936 cm(-1) band. Results have shown that hydrolysis and condensation reactions are depending on TBT concentration. The formation of Si-O-Si cross-linked structures increases with the TBT concentrations in the reaction. The self-condensation reaction of Si-OH grups or Ti-OH grous is very reapid forming Si-O-Si and Ti-O-Ti bonds, respectively. However, the Si-O-Ti bonds which are formed during the first moments of reaction are also rapidly broken due to H2O molecules or the reaction medium. The evolution of PDMS linear and cyclic molecules is also studied MH - Mexico|Distrito Federal MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 6 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000224312900009 L2 - ormosil;sol-gel;hydrolysis;condensation;FT-IR;SILOXANE-OXIDE MATERIALS; TITANIUM TETRABUTOXIDE; INFRARED-SPECTROSCOPY; INORGANIC POLYMERS; SOL; GEL; HYDROLYSIS; ORMOSILS; POLYDIMETHYLSILOXANE; ALKOXIDES SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(5):883-890 12602 UI - 6078 AU - Tellez L AU - Rubio J AU - Rubio F AU - Morales E AU - Oteo JL AD - UPALM Zacatenco, ESIQIE, Dept Met & Mat, Inst Politecn Nacl, Mexico City 07738, DF, MexicoCSIC Canto Blanco, Inst Ceram & Vidrio, Madrid, SpainTellez, L, UPALM Zacatenco, ESIQIE, Dept Met & Mat, Inst Politecn Nacl, Mexico City 07738, DF, Mexico TI - FT-IR study of the hydrolysis and polymerization of tetraethyl orthosilicate and polydimethyl siloxane in the presence of tetrabutyl orthotitanate AB - In this work, we have used FT-IR spectroscopy to study the hydrolysis and polymerization reactions of tetraethyl orthosilicate (TEOS) and polydimethyl-siloxane (PDMS) in the presence of tetrabutyl orthotitanate (TBOT). These reactions are used for obtaining SiO2-PDMS-TiO2 organically modified silicates (Ormosils). In order to obtain semi-quantitative information about such reactions, a deconvolution procedure of the FT-IR spectra has been done by use of a computer program. Hydrolysis reactions have been characterized by Me-O-C (Me = Si, Ti) bonds, and polymerization reactions by Me-O-Me bonds. Instantaneous hydrolysis of TEOS has been observed, together with condensation reactions between Si-OH groups, which give crosslinked and linear Si-O-Si structures. The TBOT is also hydrolyzed, but the high acid concentration inhibits condensation reactions between Ti-OH groups. The PDMS also condenses mainly with Si-OH groups and probably with Ti-OH, finally forming Me-O-PDMS, bonds. the formation of Si-O-Si crosslinked structures and also Me-O-PDMS structures continues until the end of reaction. The gelling time is dependent on TBOT concentration in the reaction medium, and, therefore, polycondensation reactions are dependent on TBOT concentration MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 4 U4 - Spectroscopy U5 - J;Article AV - English IS - 0038-7010 UR - ISI:000189254000002 L2 - titanium alkoxide;hydrolysis;FT-IR spectroscopy;deconvolution;Ormosils;INORGANIC-ORGANIC HYBRIDS; TITANIUM TETRABUTOXIDE; OPTICAL-PROPERTIES; METAL ALKOXIDES; OXIDE MATERIALS; SOL; GEL; ORMOSILS; SPECTROSCOPY; EVOLUTION SO - Spectroscopy Letters 2004 ;37(1):11-31 12603 UI - 5629 AU - Tenorio FJ AU - Murray I AU - Martinez A AU - Klabunde KJ AU - Ortiz JV AD - Kansas State Univ, Dept Chem, Manhattan, KS 66506, USAUniv Guanajuato, Fac Quim, Guanajuato 36050, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoTenorio, FJ, Kansas State Univ, Dept Chem, Manhattan, KS 66506, USA TI - Products of the addition of water molecules to Al3O3- clusters: Structure, bonding, and electron binding energies in Al3O4H2-, Al3O5H4-, Al3O4H2, and Al3O5H4 AB - Two stable products of reactions of water molecules with the Al3O3- cluster, Al3O4H2- and Al3O5H4-, are studied with electronic structure calculations. There are several minima with similar energies for both anions and the corresponding molecules. Dissociative absorption of a water molecule to produce an anionic cluster with hydroxide ions is thermodynamically favored over the formation of Al3O3-(H2O)(n) complexes. Vertical electron detachment energies of Al3O4H2- and Al3O5H4- calculated with ab initio electron propagator methods provide a quantitative interpretation of recent anion photoelectron spectra. Contrasts and similarities in these spectra may be explained in terms of the Dyson orbitals associated with each transition energy. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 10 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000221084500014 L2 - ALUMINUM-OXIDE CLUSTERS; GAUSSIAN-BASIS SETS; PHOTOELECTRON-SPECTRA; ORBITAL METHODS; SPECTROSCOPY; PHOTOISOMERIZATION; DENSITY; ALO2 SO - Journal of Chemical Physics 2004 ;120(17):7955-7962 12604 UI - 6036 AU - Terlevich R AU - Silich S AU - Rosa-Gonzalez D AU - Terlevich E AD - INAOE, Tonantzintla 72840, Puebla, MexicoUniv London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BW, EnglandTerlevich, R, INAOE, Luis Enrique Erro 1, Tonantzintla 72840, Puebla, Mexico TI - How old are H II galaxies? AB - Using a novel approach we have reanalysed the question of whether the extreme star- forming galaxies known as H II galaxies are truly young or rejuvenated old systems. We first present a method of inversion that applies to any monotonic function of time describing the evolution of independent events. We show that, apart from a normalization constant, the 'true' time dependence can be recovered from the inversion of its probability density function. We applied the inversion method to the observed equivalent width of the Hbeta [EW(Hbeta)] distribution for objects in the Spectrophotometric Catalogue of HII Galaxies compiled by Terlevich and collaborators, and found that the global history of star formation behaves more like a continuous star- formation model than an instantaneous model. On the other hand, when the inversion method is applied to samples within a restricted metallicity range, we find that their history of star formation is much closer to what the instantaneous model predicts. Our main conclusion is that, globally, the evolution of HII galaxies seems consistent with a succession of short starbursts separated by quiescent periods and that, while the emission lines trace the properties of the present burst, the underlying stellar continuum traces the whole star- formation history of the galaxy. Thus, observables like the EW(Hbeta) that combine an emission line flux, i. e. a parameter pertaining to the present burst, with the continuum flux, i. e. a parameter that traces the whole history of star formation, should not be used alone to characterize the present burst MH - United Kingdom MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000220088100008 L2 - stars : formation;HII regions;galaxies : formation;galaxies : fundamental parameters;galaxies : irregular;galaxies : starburst;LOW-METALLICITY GALAXIES; BETA EMISSION-LINE; STAR-FORMATION; EQUIVALENT WIDTH; SPECTROSCOPY; EVOLUTION; REGIONS; ORIGIN; MODELS SO - Monthly Notices of the Royal Astronomical Society 2004 ;348(4):1191-1196 12605 UI - 4123 AU - Terrones H AU - Terrones M AU - Lopez-Urias F AU - Rodriguez-Manzo JA AU - Mackay AL AD - IPICyT, Adv Mat Dept, Lomas Secc 4, San Luis Potosi 78216, MexicoUniv London Birkbeck Coll, London WC1E 7HX, EnglandTerrones, H, IPICyT, Adv Mat Dept, Lomas Secc 4, Camino Presa San Jose 2055, San Luis Potosi 78216, Mexico TI - Shape and complexity at the atomic scale: the case of layered nanomaterials AB - In nature there are numerous layered compounds, some of which could be curved so as to form fascinating nanoshapes with novel properties. Graphite is at present the main example of a very flexible layered structure. which is able to form cylinders (nanotubes) and cages (fullerenes), but there are others. While fullerenes possess positive curvature due to pentagonal rings of carbon, there are other structures which could include heptagonal or higher membered rings. In fact, fullerenes and nanotubes could display negative curvature, thus forming nanomaterials possessing unexpected electronic and mechanical properties. The effect of curvature in other nano-architectures, such as in boron nitride and metal dichalcogenides, is also discussed in this account. Electron irradiation is a tool able to increase the structural complexity of layered materials. In this context, we describe the coalescence of carbon nanotubes an C-60 molecules. The latter results now open up an alternative approach to producing and manipulating novel nanomaterials in the twenty-first century MH - United Kingdom MH - Mexico|San Luis Potosi PB - LONDON: ROYAL SOC LONDON RP - NOT IN FILE U3 - TC 9 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1364-503X UR - ISI:000224557900003 L2 - graphite;boron nitride;curvature;fullerenes;topology;WALLED CARBON NANOTUBES; NONPOSITIVE GAUSSIAN CURVATURE; BORON-NITRIDE NANOTUBES; ELECTRONIC-PROPERTIES; FORMATION MECHANISM; NEGATIVE-CURVATURE; TUNGSTEN DISULFIDE; GRAPHITIC CARBON; WS2 NANOPARTICLES; CURVED GRAPHITE SO - Philosophical Transactions of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 2004 ;362(1823):2039-2063 12606 UI - 4406 AU - Therrell MD AU - Stahle DW AU - Soto RA AD - Univ Arkansas, Dept Geosci, Fayetteville, AR 72701, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoTherrell, MD, Univ Arkansas, Dept Geosci, 113 Ozark Hall, Fayetteville, AR 72701 USA TI - Aztec drought and the "curse of one rabbit" AB - Sixteenth-century Aztec codices preserve a record of at least 13 drought years in central Mexico during the prehispanic and early colonial period. Climate-sensitive tree-ring records recently developed for Mexico confirm 9 of the 13 Aztec drought dates, including the extended drought related to the infamous "famine of One Rabbit" in 1454. One Rabbit is the first year of the 52-yr Aztec calendar cycle, and folklore suggests that famine and catastrophe accompany its return. The Mexican tree-ring data indicate that severe drought occurred immediately before 10 of the 13 One Rabbit years during and before the Aztec era A.D. 882-1558. This relationship between drought and the year preceding One Rabbit is statistically significant and suggests a real climatic origin for the "curse of One Rabbit." MH - USA MH - Mexico|Distrito Federal PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0003-0007 UR - ISI:000224135200010 L2 - VOLCANIC-ERUPTIONS; MEXICO; RECORDS; PRECIPITATION; CLIMATE SO - Bulletin of the American Meteorological Society 2004 ;85(9):1263-+ 12607 UI - 3750 AU - Thierry S AU - Macarie H AU - Lizuka T AU - Geissdorfer W AU - Assih EA AU - Spanevello M AU - Verhe F AU - Thomas P AU - Fudou R AU - Monroy O AU - Labat M AU - Ouattara AS AD - Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Mexico City 09340, DF, MexicoIRD, Mexico City 11530, DF, MexicoUniv Provence & Mediterranee, BAIM, Microbiol Lab, IRD, F-13288 Marseille, FranceAjinomoto Co Inc, Cent Res Lab, Kawasaki Ku, Kawasaki, Kanagawa 2108681, JapanInst Klin Mikrobiol Immunol & Hyg, D-91054 Erlangen, GermanyUniv Ouagadougou, LAMIB, CRSBAN, Dept Biochim & Microbiol,Unite Format & Rech Sci, Ouagadougou 03, Burkina FasoQueensland Inst Med Res, Leukaemia Fdn Res Unit, Herston, Qld 4000, AustraliaMacarie, H, Univ Autonoma Metropolitana Iztapalapa, Dept Biotechnol, Avenida Michoacan & Purisima S-N,Col Vicentina, Mexico City 09340, DF, Mexico TI - Pseudoxanthomonas mexicana sp nov and Pseudoxanthomonas japonensis sp nov., isolated from diverse environments, and emended descriptions of the genus Pseudoxanthomonas Finkmann et al 2000 and of its type species AB - Three mesophilic bacteria (strains AMX 26B(T), UR374_02 and 12-3(T)) isolated respectively from an anaerobic digester, human urine and urban riverside soil were characterized. Cells were Gram-negative, motile, non-sporulating, straight to curved rods with one polar flagellum and had a strictly respiratory metabolism with O-2 as the preferential terminal electron acceptor. Phylogenetic analysis based on 16S rRNA gene sequences revealed that all strains clustered within the Xanthomonadaceae branch of the Proteobacteria. Isolates AMX 26B(T) and UR374_02 exhibited 100% 16S rRNA gene sequence similarity and both were related to strain 12-3(T) (99-6% similarity). The closest relative of all the isolates was Pseudoxanthomonas broegbernensis DSM 12573(T) (similarity 97.1-97.5%), and they were equidistantly related to Xanthomonas species (95.4-96.6%), Stenotrophomonas species (95.3-96.1%) and Pseudoxanthomonas taiwanensis ATCC BAA-4040(T) (95.3-95.4%). Chemotaxonomic and biochemical data (branched-chain cellular fatty acid pattern without C-13:0 iso 3-OH, ubiquinone with eight isoprenoid units, limited range of substrates used, ability to reduce nitrite but not nitrate with the production of N2O) supported their affiliation to the genus Pseudoxanthomonas. The results of DNA-DNA hybridization and/or phenotypic analysis allowed them to be differentiated from the two Pseudoxanthomonas species with validly published names and showed that strain 12-3(T) was genomically and phenotypically distinct from the other two isolates. On the basis of these results, two novel species of the genus Pseudoxanthomonas are proposed: Pseudoxanthomonas mexicana sp. nov., consisting of strains AMX 26B(T) ( = ATCC 700993(T)= CIP 106674(T) = JCM 11524(T)) (type strain) and UR374_02 ( = DSM 15133), and Pseudoxanthomonas japonensis sp. nov., consisting of strain 12-3(T) ( = CCUG 48231(T)=CIP 107388(T) = JCM 11525(T)). The report of these two novel species leads to the emendation of the description of the genus Pseudoxanthomonas and the re-evaluation of the phenotype of P. broegbernensis DSM 12573(T) necessitates the emendation of its description MH - Australia MH - Burkina Faso MH - France MH - Germany MH - Japan MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000225366000059 L2 - AD-HOC-COMMITTEE; BACTERIAL FLAGELLA; XANTHOMONAS; DEFINITION; BIOFILTERS SO - International Journal of Systematic and Evolutionary Microbiology 2004 ;54():2245-2255 12608 UI - 4785 AU - Thomas CD AU - Cameron A AU - Green RE AU - Bakkenes M AU - Beaumont LJ AU - Collingham YC AU - Erasmus BFN AU - de Siqueira MF AU - Grainger A AU - Hannah L AU - Hughes L AU - Huntley B AU - van Jaarsveld AS AU - Midgley GF AU - Miles L AU - Ortega-Huerta MA AU - Peterson AT AU - Phillips OL AU - Williams SE AD - Univ Leeds, Sch Biol, Ctr Biodivers & Conservat, Leeds LS2 9JT, W Yorkshire, EnglandRoyal Soc Protect Birds, Sandy SG19 2DL, Beds, EnglandUniv Cambridge, Dept Zool, Conservat Biol Grp, Cambridge CB2 3EJ, EnglandNatl Inst Publ Hlth & Environm, NL-3720 BA Bilthoven, NetherlandsMacquarie Univ, Dept Biol Sci, N Ryde, NSW 2109, AustraliaUniv Durham, Sch Biol & Biomed Sci, Durham DH1 3LE, EnglandUniv Witwatersrand, ZA-2050 Wits, South AfricaCtr Referencia Informacao Ambiental, BR-13083885 Campinas, SP, BrazilUniv Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, EnglandConservat Int, Ctr Appl Biodivers Sci, Washington, DC 20036, USAUniv Stellenbosch, Dept Zool, ZA-7602 Stellenbosch, South AfricaNatl Bot Inst, Kirstenbosch Res Ctr, Climate Change Res Grp, ZA-7735 Cape Town, South AfricaUniv Nacl Autonoma Mexico, Inst Biol, Unidad Occidente, Mexico City 04510, DF, MexicoUniv Kansas, Museum Nat Hist, Lawrence, KS 66045, USAUniv Kansas, Biodivers Res Ctr, Lawrence, KS 66045, USAJames Cook Univ N Queensland, Sch Trop Biol, Cooperat Res Ctr Trop Rainforest Ecol, Townsville, Qld 4811, AustraliaThomas, CD, Univ Leeds, Sch Biol, Ctr Biodivers & Conservat, Leeds LS2 9JT, W Yorkshire, England TI - Extinction risk from climate change AB - Climate change over the past similar to30 years has produced numerous shifts in the distributions and abundances of species(1,2) and has been implicated in one species-level extinction(3). Using projections of species' distributions for future climate scenarios, we assess extinction risks for sample regions that cover some 20% of the Earth's terrestrial surface. Exploring three approaches in which the estimated probability of extinction shows a powerlaw relationship with geographical range size, we predict, on the basis of mid-range climate-warming scenarios for 2050, that 15 - 37% of species in our sample of regions and taxa will be 'committed to extinction'. When the average of the three methods and two dispersal scenarios is taken, minimal climate-warming scenarios produce lower projections of species committed to extinction (similar to18%) than mid-range (similar to24%) and maximum-change (similar to35%) scenarios. These estimates show the importance of rapid implementation of technologies to decrease greenhouse gas emissions and strategies for carbon sequestration MH - Australia MH - Brazil MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands MH - South Africa MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 499 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000187863900033 L2 - ELEVATED CO2; BIODIVERSITY; IMPACTS; DEFORESTATION; PLANTS; VULNERABILITY; SCENARIOS; FORESTS SO - Nature 2004 ;427(6970):145-148 12609 UI - 3819 AU - Thulin M AU - Lavin M AU - Pasquet R AU - gado-Salinas A AD - Uppsala Univ, Evolutionary Biol Ctr, Dept Systemat Bot, SE-75236 Uppsala, SwedenMontana State Univ, Dept Plant Sci & Plant Pathol, Bozeman, MT 59717, USAInt Ctr Insect Physiol & Ecol, Inst Rech Dev, Nairobi, KenyaUniv Nacl Autonoma Mexico, Inst Biol, Dept Bot, Mexico City 04510, DF, MexicoThulin, M, Uppsala Univ, Evolutionary Biol Ctr, Dept Systemat Bot, Norbyvagen 18D, SE-75236 Uppsala, Sweden TI - Phylogeny and biogeography of Wafira (Leguminosae): A monophyletic segregate of Vigna centered in the horn of Africa region AB - Evidence from chloroplast trnK and nuclear ribosomal ITS sequences and morphological data reveals that the monotypic legume genus Wajira is nested within a clade comprising the species of Vigna subgen. Macrorhynchus. This Wajira-containing clade is basally branching in a larger clade that contains many of the genera traditionally referred to as tribe Phaseoleae subtribe Phaseolinae. Wajira is thus recircumscribed to include Vigna subgen. Macrorhynchus. Given the heterogeneity of floral morphology of its constituent species, Wajira is apomorphically diagnosed by woody stems and a pollen brush that comprises an introrse linear array of unicellular hairs. This recircumscribed genus now comprises five species, one of which is described as new, Wajira danissana. Three species require new nomenclatural combinations, Wajira grahamiana, Wajira praecox, and Wajira virescens. Wajira albescens, W danissana, W praecox, and W virescens are woody climbers that are each narrowly distributed in the and Somalia-Masai region characterized by sparse ground cover not subjected to seasonal burning. Wajira grahamiana has a thick woody subterranean rootstock that resprouts stems, and is widespread in the Sudano-Zarnbezian Region, southern India, and Sri Lanka, where grasslands subjected to seasonal burning predominate. This species is resolved in all phylogenetic analyses as derived from within the Somalia-Masai clade. An evolutionary rates analysis of trnK sequences suggests that the Wajira stem clade diverged from its closest relatives just over 10 million years ago, the extant diversification of the genus began around 6-7 million years ago, and Wajira grahamiana attained its widespread distribution during the last 2 million years MH - Kenya MH - Mexico|Distrito Federal MH - Sweden MH - USA PB - BRONX: AMER SOC PLANT TAXONOMISTS RP - NOT IN FILE U3 - TC 4 U4 - Plant Sciences;Evolutionary Biology U5 - J;Article AV - English IS - 0363-6445 UR - ISI:000225245000010 L2 - MOLECULAR-DATA SETS; BAYESIAN-INFERENCE; DIVERGENCE TIMES; PAPILIONOIDEAE; FABACEAE; EVOLUTION; POLLINATION; ORIGIN; MODEL SO - Systematic Botany 2004 ;29(4):903-920 12610 UI - 4584 AU - Timossi C AU - Ortiz-Elizondo C AU - Pineda DB AU - Dias JA AU - Conn PM AU - Ulloa-Aguirre A AD - Hosp Ginecobstetricia Luis Castelazo Ayala, Res Unit Reprod Med, Inst Mexicano Seguro Social, Mexico City 10101, DF, MexicoNew York State Dept Hlth, Wadsworth Ctr, David Axelrod Inst Publ Hlth, Albany, NY, USAOregon Hlth Sci Univ, Oregon Natl Primate Res Ctr, Beaverton, OR, USAUlloa-Aguirre, A, Hosp Ginecobstetricia Luis Castelazo Ayala, Res Unit Reprod Med, Inst Mexicano Seguro Social, Apartado Postal 99-065,Unidad Independencia, Mexico City 10101, DF, Mexico TI - Functional significance of the BBXXB motif reversed present in the cytoplasmic domains of the human follicle-stimulating hormone receptor AB - The minimal structural motif, BBXXB (where B represents a basic amino acid residue and X a non-basic residue), located in particular regions of the intracellular domains of cell surface membrane receptors is involved in the G protein-activating activity of a number of G protein-coupled receptors. The human FSH receptor (hFSHR) exhibits a reversed BBXXB motif (BXXBB) in the juxtamembrane region of the third intracellular loop (IL3) and the carboxyl terminus (Ctail) of the receptor; however the importance of this sequence on receptor function remains unclear. In the present study, we analyzed the effects of mutations in this structural motif on hFSHR expression, receptor-mediated effector activation and agonist-provoked receptor internalization. Human embryonic kidney 293 cells were transiently transfected with plasmids containing the cDNA of the wild-type (Wt) hFSHR or several hFSHR mutants in which basic amino acids of the minimal structural motif at the IL3 and Ctail were replaced with alanine (i.e. AXXAA, AXXBB, BXXAB and BXXBA mutants). Alanine substitution of the three basic residues present in the IL3-BXXBB (IL3-AXXAA mutant) yielded a less than or equal to60 kDa possibly under-glycosylated form of the FSHR, whereas the same substitutions in the Ctail resulted in the immature >62 kDa form of the receptor; both AXXAA hFSHR mutants completely failed to bind agonist and activate effector. Individual substitutions resulted in different cAMP responses to agonist stimulation: the IL3-AXXBB and IL3-BXXBA mutant hFSHRs failed to evoke G(s) protein activation, whereas agonist-stimulated cAMP production was completely normal when the IL3-BXXAB mutant was expressed. All three ID mutants bound [I-125]-labelled FSH in a similar fashion to the Wt hFSHR. Ligand-binding, cell surface membrane receptor expression and agonist-provoked effector activation were significantly affected by the individual substitutions at the Ctail-BXXBB motif: the Ctail-AXXBB variant exhibited reduced (similar to50%) maximal cAMP response and ability to bind ligand, whereas both ligand binding and effector activation was severely reduced or abolished by expression of the Ctail-BXXBA and -BXXAB hFSHR mutants; the expression levels of the 80 kDa form of the receptor correlated with the magnitude of ligand-provoked cAMP production and binding capability of the mutant receptors. Upon stimulation by agonist, all mutants with detectable ligand-binding activity internalized following the pattern exhibited by the Wt hFSHR species. These results indicate that the BXXBB motif at the IL3 of the hFSHR is essential for coupling the activated receptor to the G(s) protein, whereas the same motif in the Ctail is apparently more important for membrane expression. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 4 U4 - Cell Biology;Endocrinology & Metabolism U5 - J;Article AV - English IS - 0303-7207 UR - ISI:000223444500003 L2 - follicle-stimulating hormone receptor;FSHR;BBXXB motif;receptor mutation;3RD INTRACELLULAR LOOP; PROTEIN-COUPLED RECEPTORS; BETA-ADRENERGIC-RECEPTOR; HUMAN THYROTROPIN RECEPTOR; SITE-DIRECTED MUTAGENESIS; CARBOXYL-TERMINAL REGION; RAT TESTIS MEMBRANES; FOLLITROPIN RECEPTOR; SIGNAL-TRANSDUCTION; FSH RECEPTOR SO - Molecular and Cellular Endocrinology 2004 ;223(1-2):17-26 12611 UI - 3877 AU - Tirado-Mendez JA AU - Jardon-Aguilar H AU - Iturbide-Sanchez F AU - Garcia-Ruiz I AU - Molina-Lopez V AU - cevo-Herrera R AD - IPN, Ctr Res & Adv Studies, Telecommun Sect, Mexico City 07360, DF, MexicoUniv Massachusetts, Dept Elect Engn, LAMMDA, Amherst, MA 01003, USACENAM, Lab High Frequencies, Queretaro, Qro, MexicoTirado-Mendez, JA, IPN, Ctr Res & Adv Studies, Telecommun Sect, Av IPN 2508 Esq Av Ticoman San Pedro Zacatenco, Mexico City 07360, DF, Mexico TI - A proposed defected microstrip structure (DMS) behavior for reducing rectangular patch antenna size AB - A defected microstrip structure (DMS) is proposed to reducing the size of a rectangular patch antenna by increasing its electric length, without degrading its performance. To illustrate this advantage, one conventional and one proposed defected patch antenna were developed and measured at 1.77 GHz. The simulated and measured results concerning the radiation patterns and bandwidth of both antennas are very closely related, but the proposed defected antenna achieves 22% of total-area reduction. (C) 2004 Wiley Periodicals. Inc MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000225071000008 L2 - DGS;patch antenna;DMS;photonic bandgap;BANDGAP GROUND PLANE; CIRCUITS; DESIGN; LINE SO - Microwave and Optical Technology Letters 2004 ;43(6):481-484 12612 UI - 5840 AU - Tirado-Mendez JA AU - Iturbide-Sanchez F AU - Golovin O AU - Jardon-Aguilar H AD - IPN, Ctr Res & Adv Studies, Mexico City 07360, DF, MexicoUniv Massachusetts, Amherst, MA 01003, USAMTUSI, Moscow, RussiaTirado-Mendez, JA, IPN, Ctr Res & Adv Studies, Av IPN 2508, Mexico City 07360, DF, Mexico TI - Comparison of the effectiveness of four linearizing techniques used in SiGeHBT LNA at 1900, MHz and low-bias voltage AB - In this article, four linearizing techniques are compared with each other when they are used in a common-emitter SiGe HBT LNA. Finally, when all of them are employed together, improved linearity of the LNA is observed and more than 10 dBm of IIP3 and -5 dBm of 1-dB gain input compression point are realized when the circuit is fed with 2.4 V. (C) 2004 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Russia MH - USA PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 1096-4290 UR - ISI:000220569800006 L2 - linearity;LNA;low-level voltage;HBT;IIP3 SO - International Journal of Rf and Microwave Computer-Aided Engineering 2004 ;14(2):144-152 12613 UI - 5807 AU - Tiznado-Hernandez ME AU - Gaffe J AD - Ctr Invest Alimentac & Desarrollo AC, Dept Tecnol Alimentos Origen Vegetal, Hermosillo 83000, Sonora, MexicoUniv Grenoble 1, Grenoble, FranceTiznado-Hernandez, ME, Ctr Invest Alimentac & Desarrollo AC, Dept Tecnol Alimentos Origen Vegetal, Carretera Victoria Km 0-6,Apartado Postal 1735, Hermosillo 83000, Sonora, Mexico TI - Analysis of the pectin methylesterase activity in a segregating population of a tobacco transgenic plant using callus tissue AB - With the aim to develop a callus-based tool to study the activity of transgenes, we induced callus from a segregating population of a tobacco transgenic plant expressing a single copy of a transgene designed to overexpress a pectin methylesterase isoenzyme (pmeu1). Pectin methylesterase (PME) activity in the whole plant showed 4-fold induction whereas in callus tissue we found up to 20-fold induction. Furthermore, determination of PME activity of 38 segregating transgenic calluses showed the presence of four groups: calluses with activity like control (calluses-c), calluses with 5-fold induction (calluses-5); calluses with 10-fold induction (calluses-10) and calluses with 20-fold induction (calluses-20) of PME activity. Based on the expected Mendelian segregation of azygous: hemizygous: homozygous, we placed calluses-c, calluses-10 and calluses-20 as azygous, hemizygous and homozygous, respectively. This is a behavior that can be explained by the gene-dosage phenomena. Chi-square statistics was used to test whether the calluses-5 are azygous (chi(2) = 4.24) or either homozygous or heterozygous (chi(2) = 0.034). The Chi-square critical value is chi((alpha=0.05,1 df))(2) = 3.84 which allowed to conclude that calluses-5 are either homozygous or heterozygous. Next, we tested whether calluses-5 are either hemizygous (chi(2) = 6.36) or homozygous (chi(2) = 0.314). The critical value of chi((alpha=0.05,2 df))(2) = 5.99 was highly significant for concluding that calluses-5 are homozygous for the transgene. This is a behavior that can be explained by the co-silencing phenomena. It is concluded that the use of callus tissue can allowed to find changes in expression of transgenes that are difficult to observe in the whole plant MH - France MH - Mexico|Sonora PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0167-6857 UR - ISI:000220604000012 L2 - co-suppression;pectin methylesterase;segregation analysis;transgenic callus;EXPRESSION; GENE SO - Plant Cell Tissue and Organ Culture 2004 ;78(2):197-200 12614 UI - 3829 AU - Tiznado H AU - Fuentes S AU - Zaera F AD - UNAM, CCMC, Dept Catalisis, Ensenada 22830, Baja California, MexicoUniv Calif Riverside, Dept Chem, Riverside, CA 92521, USACICESE, Programa Posgrado Fis Mat, Ensenada 22860, Baja California, MexicoTiznado, H, UNAM, CCMC, POB 439036, San Ysidro, CA 92143, USA TI - Infrared study of CO adsorbed on Pd/Al2O3-ZrO2. Effect of zirconia added by impregnation AB - Characterization of palladium catalysts, supported on alumina and alumina modified by zirconia added by impregnation, was performed by CO adsorption from 143 to 298 K and monitored by infrared spectroscopy. It was found that the population of the Al3+ octahedral sites in the alumina decreased by the addition of zirconia. In contrast to the case of the pure alumina support, where stabilization of Pd+ was observed, Pd2+ was formed preferentially on samples where zirconia was added, and higher crystallinity in the metallic palladium was observed. Studies of CO adsorption at low temperatures (143 K) gave a better description of the surface species, since at higher temperatures (298 K) the reaction of the CO with some of the palladium oxide particles led to the partial reduction of the latter MH - Mexico|Baja California MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0743-7463 UR - ISI:000225207400020 L2 - SUPPORTED PALLADIUM CATALYSTS; REFLECTION-ABSORPTION-SPECTROSCOPY; SOL-GEL METHOD; CARBON-MONOXIDE; 3-WAY CATALYSTS; SURFACE CHARACTERIZATION; NO REDUCTION; ADSORPTION; ALUMINA; PD SO - Langmuir 2004 ;20(24):10490-10497 12615 UI - 5450 AU - Tomas SA AU - Cruz-Orea A AU - Stolik S AU - Pedroza-Islas R AU - Villagomez-Zavala DL AU - Gomez-Corona C AD - IPN, CINVESTAV, Dept Fis, Mexico City 07360, DF, MexicoCtr Aplicac Tecnol & Desarrollo Nucl, Havana, CubaUniv Iberoamer, Dept Ingn & Ciencias Quim, Mexico City 01210, DF, MexicoTomas, SA, IPN, CINVESTAV, Dept Fis, AP 14-740, Mexico City 07360, DF, Mexico TI - Determination of the thermal diffusivity of edible films AB - One of the most important factors in the preparation of edible films regards the choice of ingredients. Edible films are commonly prepared with single or mixed high-molecular-weight compounds like proteins and gums. In the present work, protein and gum-based edible films were prepared and their thermal diffusivity determined by photoacoustics. The films were prepared with different concentrations of four basic ingredients: whey protein concentrate, mesquite gum, sodium alginate, and kappa-carrageenan. In single-component films, the highest thermal diffusivity was found in mesquite gum (1.97 x 10(-7) m(2) . s(-1)), followed by sodium alginate, whey protein concentrate, and kappa-carrageenan samples. In composed films, the highest thermal diffusivity was obtained in a ternary film made of mesquite gum, whey protein concentrate, and sodium alginate in identical parts (5.20 x 10(-7) m(2) . s(-1)) MH - Cuba MH - Mexico|Distrito Federal PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 4 U4 - Thermodynamics;Chemistry, Physical;Mechanics;Physics, Applied U5 - J;Article AV - English IS - 0195-928X UR - ISI:000221530400027 L2 - edible films;photoacoustics;thermal diffusivity;whey proteins;WATER-VAPOR PERMEABILITY; PROTEIN FILMS; BARRIER PROPERTIES; WHEY-PROTEIN; PHOTOACOUSTIC MEASUREMENT; TROPICAL ENVIRONMENTS; MECHANICAL-PROPERTIES; MICROSCOPY; GELATION; OXYGEN SO - International Journal of Thermophysics 2004 ;25(2):611-620 12616 UI - 3409 AU - Toner BM AU - Manceau A AU - Villalobos M AU - Fakra SC AU - Webb SM AU - Marcus MM AU - Bargar JR AU - Tebo BM AU - Sposito G AD - Univ Calif Berkeley, Dept Environm Sci, Berkeley, CA 94720, USAUniv Grenoble, CNRS, Environm Geochem Grp, F-38041 Grenoble, FranceUNAM, Inst Geog, Environm Bio Geochem Grp, Mexico City, DF, MexicoLawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA, USAStanford Synchrotron Radiat Lab, Stanford, CA 94309, USAUniv Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92103, USA TI - Reactivity of a bacterial manganese oxide produced within a biofilm MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655604020 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U1217-U1217 12617 UI - 4730 AU - Torchia GA AU - Domenech M AU - Vazquez GV AU - Cantelar E AU - Lifante G AU - Cusso F AD - Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, SpainConsejo Nacl Invest Cient & Tecn, CIC, Ctr Invest Opt, RA-1900 La Plata, ArgentinaCtr Invest Opt, Leon 37000, Gto, MexicoTorchia, GA, Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain TI - Photoacoustic detection of heat generation in proton-implanted Nd : YAG waveguides with and without laser operation AB - In this work the heat generation in proton-implanted planar Nd:YAG waveguides with and without laser action is determined by using photoacoustic techniques. From the analysis of the photoacoustic signal in the two emission regimes (stimulated and spontaneous) as a function of the absorbed power, it was found that the heat generated is substantially reduced during laser action. The quotient of the heat generated in both emission channels (stimulated and spontaneous) was found to be S-stimulated/S-spontaneous=0.65+/-0.03. This value is in agreement with the theoretical estimation considering a Nd3+ quantum efficiency Phi(waveguide)=0.78, extracted from the lifetime measured in the waveguide, slightly lower than the value in the bulk. This work demonstrates that photoacoustic measurements provide a sensitive method to characterize the performance of waveguide lasers MH - Argentina MH - Mexico|Guanajuato MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Applied U5 - J;Article AV - English IS - 0946-2171 UR - ISI:000223260300014 L2 - QUANTUM-EFFICIENCY; SOLIDS; SPECTROSCOPY; YB SO - Applied Physics B-Lasers and Optics 2004 ;79(4):477-483 12618 UI - 5135 AU - Torchynska T AU - Hernandez AV AU - Kolobov AV AU - Goldstein Y AU - Savir E AU - Jedrzejewski J AD - Inst Politecn Nacl, ESFM, Mexico City 07738, DF, MexicoNatl Inst Adv Ind Sci & Technol, LAOTECH, Tsukuba, Ibaraki 3058562, JapanHebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, IsraelTorchynska, T, Inst Politecn Nacl, ESFM, Mexico City 07738, DF, Mexico TI - Visible photoluminescence of Ge enriched SiO2 layers AB - This paper concentrates on results of photoluminescence (PL), Raman scattering and extended X-ray absorption fine structure (EXAFS) investigations of silicon oxide films enriched by Ge. All the spectra were analyzed both for "as prepared" silicon oxide films enriched by Ge (without Ge-quantum dots, QD) and for films after high temperature annealing in inert atmosphere with the aim of creating Ge-nano-crystallites (nc)-quantum dots. Five PL bands were discovered in Ge-SiOx systems. It is shown that the visible PL bands peaked at 1.61-1.65 eV (2), 1.75-1.80 eV (3), 2.00-2.06 eV (4) and 2.25-2.30 eV (5) do not correlate with the presence of Ge atoms or Ge-nc in the samples. The nature of the infrared PL band peaked at 1.43-1.52 eV is not clear. The intensity of this PL band increases in thermally annealed samples with increasing Ge concentration. (C) 2004 Elsevier B.V. All rights reserved MH - Israel MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Spectroscopy U5 - J;Article AV - English IS - 0368-2048 UR - ISI:000222251900100 L2 - visible photoluminescence;Ge-SiO;layers;Ge-quantum dots;POROUS SILICON; CONFINEMENT; DEFECT; ELECTROLUMINESCENCE; LUMINESCENCE; EXCITATION; BAND SO - Journal of Electron Spectroscopy and Related Phenomena 2004 ;137-40():619-622 12619 UI - 6562 AU - Toriz G AU - Ramos J AU - Young RA AD - Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706, USAUniv Wisconsin, Ctr Plasma Aided Mfg, Madison, WI 53706, USAUniv Guadalajara, Dept Wood Cellulose & Paper, Guadalajara 45020, Jalisco, MexicoYoung, RA, Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706 USA TI - Lignin-polypropylene composites. II. Plasma modification of kraft lignin and particulate polypropylene AB - Indulin kraft lignin and polypropylene were subjected to plasma treatments in a rotating electrodeless plasma reactor at 13.56 MHz radio frequency, with the goal of improving the strength properties of the composites made from these materials. It was shown that efficient surface modification could be achieved by these plasma treatments, avoiding long reaction times and large volumes of reactants for modification by conventional wet chemistry. SiCl4-plasma treatments of lignin at 100 and 200 W resulted in silicon implantation in the range of 4-10% that depended on the treatment time. However, the effect of power in the treatments was minimal, given that changes in silicon implantation were not observed for changes in this parameter. SiCl4-Plasma treatment of polypropylene at 80 W, 1 and 10 min, resulted in silicon implantation in the order of 10-15%, for the two different treatment times, showing that low power and short treatment times were sufficient to significantly alter the polypropylene surface. However at high power (250 W), the longer treatment time of polypropylene apparently led to formation of oligohalosilanes. Other plasma treatments in the rotating reactor such as plasma-induced copolymerization of acryloyl chloride on both lignin and polypropylene, and plasma-state polymerization of acryloyl chloride on polypropylene under pulsing conditions, resulted in thin film depositions. Evaluation of composites from these treated materials is described in the next contribution (Part 111) from this series. (C) 2003 Wiley Periodicals, Inc MH - USA MH - Mexico|Jalisco PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Polymer Science U5 - J;Article AV - English IS - 0021-8995 UR - ISI:000187712400069 L2 - plasma;kraft lignin;polypropylene modification;functionalization of particles;graft copolymers;SURFACE FUNCTIONALIZATION; POLYMERIZATION; DEPOSITION; FILM; FRAGMENTATION SO - Journal of Applied Polymer Science 2004 ;91(3):1920-1926 12620 UI - 5896 AU - Torner L AU - Maloumby R AU - Nava G AU - Aranda J AU - Clapp C AU - Neumann ID AD - Univ Regensburg, Inst Zool, D-93053 Regensburg, GermanyNatl Autonomous Univ Mexico, Inst Neurobiol, Mexico City, DF, MexicoTorner, L, Univ Regensburg, Inst Zool, Univ Str 31, D-93053 Regensburg, Germany TI - In vivo release and gene upregulation of brain prolactin in response to physiological stimuli AB - Although prolactin (PRL) actions and expression in the brain have been shown, dynamic changes in its intracerebral release and gene expression have still not been demonstrated. Using push-pull perfusion, the in vivo release of PRL was monitored within the paraventricular nucleus (PVN) and medial preoptic area (MPOA) of virgin female, lactating and male rats in response to various stimuli. Perfusion with a depolarizing medium (56 mm K+) increased local release of PRL within both the PVN (P< 0.05) and MPOA (P< 0.05) of urethane-anaesthetized rats, indicating release from excitable neuronal structures. The PRL in perfusates was verified by radioimmunoassay, Nb2 cell bioassays and western blot. Systemic osmotic stimulation (3 M NaCl i.p., 8 mL/kg b.w.) raised PRL concentration in plasma (P< 0.01) but not within the PVN, suggesting independent release from the pituitary and in distinct brain regions. Immobilization for 30 min increased PRL release within the PVN (P< 0.05) and the MPOA (P< 0.01) of virgin female and male (P < 0.05 each) rats and increased hypothalamic PRL mRNA expression (P= 0.008) after 30 and 90 min as revealed by real-time polymerase chain reaction. This indicates a stress-induced activation of both PRL release from and synthesis in hypothalamic neurons. Additionally, PRL was significantly released within, but not outside, the PVN (P< 0.01) and the MPOA (P< 0.05) of lactating rats during suckling and this was accompanied by a significant increase of PRL mRNA (P < 0.05) in the hypothalamus 60 min after suckling. This is the first demonstration of stimulus-induced, locally restricted release and gene upregulation of PRL within the brain, emphasizing the involvement of this 'novel' neuropeptide in various brain functions MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 16 U4 - Neurosciences U5 - J;Article AV - English IS - 0953-816X UR - ISI:000220519500017 L2 - hypothalamus;medial preoptic area;neuropeptide;paraventricular;push-pull;rat;stress;suckling;HYPOTHALAMIC PARAVENTRICULAR NUCLEUS; OXYTOCIN MESSENGER-RNA; PUSH-PULL PERFUSION; MATERNAL-BEHAVIOR; FEMALE RATS; IMMUNOREACTIVE PROLACTIN; CEREBROSPINAL-FLUID; C-FOS; MAGNOCELLULAR NEURONS; PERIPHERAL RELEASE SO - European Journal of Neuroscience 2004 ;19(6):1601-1608 12621 UI - 3813 AU - Torres-Acosta AA AU - Sagues AA AD - Marist Univ Queretaro, Queretaro, MexicoUniv S Florida, Dept Civil & Environm Engn, Tampa, FL 33620, USA TI - Concrete cracking by localized steel corrosion - Geometric effects AB - This work experimentally estimated the critical amount of steel corrosion (x(CRIT)) needed for concrete cover cracking of a reinforced concrete element when only a fraction of the steel bar length is corroding. The amount of corrosion needed to crack the concrete cover (x(CRIT)) was 0.030 to 0.272 mm in specimens with localized corrosion, in comparison to 0.003 to 0.074 mm for more uniform corrosion reported for other investigations in comparable systems. An empirical equation is proposed for x(CRIT) as a function of specimen dimensions (concrete clear cover C, reinforcing bar diameter phi, and anodic length L). In this equation, x(CRIT) is approximately proportional to the product of the first power of C/phi and the square of [C/L + 1] MH - Mexico|Queretaro MH - USA PB - FARMINGTON HILLS: AMER CONCRETE INST RP - NOT IN FILE U3 - TC 4 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0889-325X UR - ISI:000225228100009 L2 - corrosion;cracking;expansion SO - Aci Materials Journal 2004 ;101(6):501-507 12622 UI - 4689 AU - Torres-Acosta AA AU - Sen R AU - Martinez-Madrid M AD - Inst Mexicano Transporte, Sanfandila 76700, Queretaro, MexicoUniv Marista Queretaro, Sanfandila 76700, Queretaro, MexicoUniv S Florida, Dept Civil & Environm Engn, Tampa, FL 33620, USATorres-Acosta, AA, Inst Mexicano Transporte, Km 12 Carretera Queretaro Galinda, Sanfandila 76700, Queretaro, Mexico TI - Cathodic protection of reinforcing steel in concrete using conductive-polymer system AB - This paper presents experimental results from a novel study to investigate the feasibility of using a dual sacrificial anode cathodic protection (SACP) system that combined corrosion protection with strengthening. A conductive polymer was used to bond the zinc plates to the concrete surface to form the SACP system, while a single unidirectional carbon fiber-reinforced polymer (CFRP) sheet was bonded to the zinc surface to provide strengthening. However, the aim was not to evaluate strengthening, but to determine if the CFRP interfered with the performance of the SACP system. Four concrete prisms, two of which were strengthened, were tested. The specimens were all placed in a high humidity environment, and their potential and galvanic current measurements were carried out over the entire 295-day exposure period. It was found that the SACP system performed adequately, although there was an apparent decrease in the protective current due to passivation of the zinc plate. Although the potential results from both SACP systems studied (bare Zn plate versus Zn+CFRP ply) were different, the current delivery was similar, indicating little interference between the Zn plate and the carbon fiber ply attached on top of this plate MH - Mexico|Queretaro MH - USA PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 1 U4 - Construction & Building Technology;Engineering, Civil;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0899-1561 UR - ISI:000223189400004 L2 - fiber reinforced plastics;cathodic protection;concrete structures;steel;polymers;corrosion control;zinc SO - Journal of Materials in Civil Engineering 2004 ;16(4):315-321 12623 UI - 4163 AU - Torres-Acosta JFJ AU - Jacobs DE AU - guilar-Caballero A AU - Sandoval-Castro C AU - May-Martinez M AU - Cob-Galera LA AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Mexico City, DF, MexicoUniv London, Univ London Royal Vet Coll, Hatfield AL9 7TA, Herts, EnglandTorres-Acosta, JFJ, Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Km 15-5 Carretera Merida Xmatkuil, Mexico City, DF, Mexico TI - The effect of supplementary feeding on the resilience and resistance of browsing Criollo kids against natural gastrointestinal nematode infections during the rainy season in tropical Mexico AB - The objective was to determine the effect of supplementary feeding on the resilience and resistance of Criollo kids against natural gastrointestinal nematode (GIN) infections, when browsing native vegetation during the wet season in tropical Mexico. Thirty-four 2-month old Criollo kids, raised nematode free, were included at weaning in a 22-week trial. The kids were placed into four groups. Two groups of 8 kids were offered 100 g/day soybean and sorghum meal (26%:74%, respectively fresh basis) (treated/supplemented (T-S) and infected/supplemented (I-S)). Two groups remained with no supplement for the duration of the trial (infected/non-supplemented (I-NS) (n = 10) and treated/non-supplemented (T-NS) (n = 8)). Kids in groups T-S and T-NS were drenched with 0.2 mg of moxidectin/kg body weight orally (Cydectin, Fort Dodge) every 28 days. Groups I-S and INS were naturally infected with GIN. The animals browsed native vegetation (for an average of 7 h/ day) together with a herd of 120 naturally infected adult goats. Cumulative live weight gain (CLWG), packed cell volume (PCV), haemoglobin (Hb), total plasma protein and plasma albumin were recorded every 14 days as measurements of resilience. Resistance parameters (faecal egg counts (FEC) and peripheral eosinophil counts (PEC)) were also measured. Bulk faecal cultures were made for each group every 28 days. Every month a new pair of tracer kids assessed the infectivity of the vegetation browsed by the animals. The T-S group had the highest CLWG, PCV and Hb compared to the other three groups (P < 0.001). The I-S and T-NS group had similar mean CLWG and PCV (P > 0.05), while the I-NS group had the poorest CLWG, PCV and Hb (P < 0.001). The PEC of supplemented kids (I-S and T-S) was higher than in the I-NS and T-NS kids (P < 0.05). No effect of supplementary feeding was found in the FEC. Tracer kids and faecal cultures showed that kids suffered mixed infections with Haemonchus contortus, Trichostrongylus colubriformis and Oesophagostomum columbianum. Supplementary feeding improved resilience of browsing Criollo kids against natural GIN infections and was economically feasible. Improved resistance was also suggested by the PEC but was not confirmed in the FEC. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Parasitology;Veterinary Sciences U5 - J;Article AV - English IS - 0304-4017 UR - ISI:000224292800009 L2 - goat;gastrointestinal nematodes;supplementary feeding;resilience;resistance;SCOTTISH BLACKFACE LAMBS; TRICHOSTRONGYLUS-COLUBRIFORMIS; DIETARY-PROTEIN; HAEMONCHUS-CONTORTUS; OSTERTAGIA-CIRCUMCINCTA; PARASITE INTERACTION; PATHO-PHYSIOLOGY; BODY-COMPOSITION; GROWING LAMBS; SOYBEAN-MEAL SO - Veterinary Parasitology 2004 ;124(3-4):217-238 12624 UI - 5570 AU - Torres-Castanon JJ AU - Gorokhovskii AV AU - Zhabrev VA AU - Fuentes AF AU - Escalante-Garcia JI AU - German EV AD - Cinvestav Unidad Saltillo, Saltillo 25000, Coahuila, MexicoRussian Acad Sci, Grebenschikov Inst Silicate Chem, St Petersburg 199155, RussiaTorres-Castanon, JJ, Cinvestav Unidad Saltillo, Carr Saltillo Monterrey Km 13,AP 663, Saltillo 25000, Coahuila, Mexico TI - Kinetics and mechanism of the interaction of alkali calcium silicate glasses with salt melts in the KNO3-Pb(NO3)(2) system AB - The interaction of alkali calcium silicate glasses with salt melts in the KNO3-Pb(NO3)(2) system is investigated at temperatures of 420-520degreesC. The chemical composition of crystalline coatings formed upon treatment contains both components of the initial glass (SiO2, 9-12 wt %; CaO, 0.8-1.2 wt %) and components of the salt melt (PbO, 82-89 wt %). The treatment temperature is the main factor affecting the structure of the modified surface layer. The mechanism of the interaction of alkali calcium silicate glasses, with salt melts is analyzed. According to this mechanism, the interaction involves the ion exchange (with the participation of Na+, K+. Ca2+ and Pb2+ ions), crystallization of modified surface layers, and incorporation of PbxOy nanoparticles (formed in the salt melt) into the coating structure MH - Mexico|Coahuila MH - Russia PB - NEW YORK: MAIK NAUKA/INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1087-6596 UR - ISI:000221293800007 SO - Glass Physics and Chemistry 2004 ;30(2):167-172 12625 UI - 3714 AU - Torres-Jimenez J AU - De Alfonso C AU - Hernandez V AD - Univ Politecn Valencia, DSIC, E-46071 Valencia, SpainITESM, Dept Comp Sci, Temixco 62589, Morelos, MexicoTorres-Jimenez, J, Univ Politecn Valencia, DSIC, Camino Vera S-N, E-46071 Valencia, Spain TI - Computation of ternary covering arrays using a grid AB - Grid technology emerged (mainly) in response to the need of making efficient use of underutilized computer resources, and the availability of many commercial and freeware grid management software is making a reality the dream of having huge distributed grid computing at reasonable costs. In this paper a brief introduction to the concept of grid computing is presented, and in order to evidence the usefulness of the grid computing approach, it was applied to compute instances of a hard NP-Complete problem, namely ternary covering arrays (CA) computation, using a mutation selection algorithm that ran using InnerGRID over a UPV's computer cluster MH - Mexico|Morelos MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000225280400031 SO - Applied Computing, Proceedings 2004 ;3285():240-246 12626 UI - 4263 AU - Torres CR AU - Mascarenhas AS AU - Castillo JE AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada, Baja California, MexicoSan Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92812, USAMascarenhas, AS, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada, Baja California, Mexico TI - Three-dimensional stratified flow over Alarcon Seamount, Gulf of California entrance AB - In situ hydrographic measurements at the entrance to the Gulf of California (GC) over the Alarcon Seamount (ASM) show that isopycnals and isotherms undulate, being displaced in an upward direction and generating a dome-like structure in the density, temperature and salinity fields, while only small perturbations in both fields are observed longitudinally. On the other hand, some along-gulf observations show an 80-m amplitude internal lee wave. We hypothesize that these perturbations result from the interaction of the mean flow with local topography, which generates internal lee waves as the flow passes over the ASM. Geostrophic velocities over the ASM (at 750 db level) show a meandering jet flow and two associated eddies. A fully three-dimensional boundary-fitted curvilinear ocean model in primitive variables is used to simulate and accurately represent the 3D circulation with high resolution in the neighborhood of the ASM. The simulated flow pattern shows a meandering jet over the topography with increased velocities on the flanks of the ASM. Interaction of current and topography generates a pair of baroclinic eddies similar to those observed during winter over the ASM. The associated density field consists of an upwelling on the upstream side of the seamount, leading to a patch of relatively dense water over the seamount and a downwelling on the lee side leading to a patch of relatively less dense water downstream. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700011 SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):647-657 12627 UI - 4591 AU - Torres JC AU - del Valle L AU - Tenorio FA AU - Gonzalez A AU - Pastelin G AU - Suarez J AD - Natl Inst Cardiol Ignacio Chavez, Dept Pharmacol, Mexico City, DF, MexicoUniv Calif San Diego, Dept Med, San Diego, CA 92103, USA TI - Capsaicin receptors role in nitric oxide release induced by coronary flow in the guinea pig heart MH - Mexico|Distrito Federal MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0022-2828 UR - ISI:000221181400075 SO - Journal of Molecular and Cellular Cardiology 2004 ;36(4):626-626 12628 UI - 5167 AU - Torres M AU - Aragon JL AU - Gomez-Rodriguez A AD - CSIC, Inst Fis Aplicada, Madrid 28006, SpainUniv Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoAragon, JL, CSIC, Inst Fis Aplicada, Serrano 144, Madrid 28006, Spain TI - Polyhedral truncations as eutactic transformations AB - An eutactic star is a set of N vectors in R-n (N > n) that are projections of N orthogonal vectors in R-N. First introduced in the context of regular polytopes, eutactic stars are particularly useful in the field of quasicrystals where a method to generate quasiperiodic tilings is by projecting higher-dimensional lattices. Here are defined the concepts of eutactic transformations (as mappings that preserve eutacticity) and of vector radiations (vectors that stem from the vectors of an eutactic star), which are used to describe and parameterize polyhedral truncations. The polyhedral truncations preserve eutacticity, a result of relevance to the faceting and habit-forming characteristics of quasicrystals MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 3 U4 - Crystallography U5 - J;Article AV - English IS - 0108-7673 UR - ISI:000222237600004 L2 - QUASI-CRYSTALS; LATTICES SO - Acta Crystallographica Section A 2004 ;60():311-314 12629 UI - 5645 AU - Tovar-Ramirez D AU - Infante JZ AU - Cahu C AU - Gatesoupe FJ AU - Vazquez-Juarez R AD - CIBNOR, La Paz 23000, MexicoIFREMER Nutr Poissons, INRA, Unite Mixte, F-29280 Plouzane, FranceTovar-Ramirez, D, CIBNOR, POB 128, La Paz 23000, Mexico TI - Influence of dietary live yeast on European sea bass (Dicentrarchus labrax) larval development AB - Recent results have demonstrated that live yeast in diets improved gut maturation in sea bass larvae. In this study, we tested the absence and two levels of live yeast in sea bass larvae diets. Specimens were fed from time of mouth opening to 37 days after hatching a diet of 0%, 1.1%, or 5.7% wet weight of live yeast (Debaryomyces hansenii CBS 8339). Yeast incorporation improved survival 10%, and reduced malformed larvae. In groups fed 1.1% yeast, only 1% of larvae were malformed, compared to 14% in the control group. Final mean weight in groups fed 1.1% yeast was twice that of other groups. Activities and concentrations of mRNA trypsin and lipase were higher in the two groups fed yeast than in the control group, whereas activity and concentration of mRNA amylase were lower. This suggests that the pancreas matured faster in the two groups fed yeast. Activities of intestinal enzymes alkaline phosphatase, aminopeptidase N, and maltase in the group fed 1.1% yeast were higher than those in the two other groups, revealing earlier development of intestinal digestion. The best results were obtained with the diet containing 1.1% yeast cell biomass, corresponding approximately to 10(6) CFU g(-1) in the diet and 1.1 x 10(4) CFU per larva 30 days after hatching. The dose-dependent effect of yeast on rearing performance could be attributed to the amount of polyamines secreted by live yeast in the gut lumen of larvae. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0044-8486 UR - ISI:000221069000026 L2 - fish larvae;gut maturation;enzymes;amylase;trypsin;lipase;polyamines;INTESTINAL MATURATION; RAINBOW-TROUT; SALMO-GAIRDNERI; COMPOUND DIET; BRUSH-BORDER; POLYAMINES; SPERMINE; GROWTH; AMYLASE; MUCUS SO - Aquaculture 2004 ;234(1-4):415-427 12630 UI - 5259 AU - Tovar-Tovar A AU - Ruiz-Ramirez L AU - Campero A AU - Romerosa A AU - Moreno-Esparza R AU - Rosales-Hoz MJ AD - Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan & Nucl, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim Inorgan, Iztapalapa, MexicoUniv Almeria, Almeria, SpainRuiz-Ramirez, L, Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan & Nucl, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Structural and reactivity studies on 4,4 '-dimethyl-2,2 '-bipyridine acetylacetonate copper(II) nitrate (CASIOPEINA III-ia((R))) with methionine, by UV-visible and EPR techniques AB - When the nitrate form of [(4,4'-dimethyl -2,2'-bipyridine)(acetylacetonate) copper(II)] nitrate (Casiopeinia III ia) was reacted with methionine under two different reaction conditions: room temperature and reflux in methanol, it was found that substitution of acetylacetonate (acac) occurred and this process was monitored by UV-Vis spectrophotometry. Electron paramagnetic resonance (EPR) spectroscopy was used to analyse changes in the electronic environment of Cu(II) in the initial and final compounds. Both compounds showed axial geometry with g(parallel to) > g(perpendicular to). A detailed study of the iono-covalent features of the Cu(II) ligand bonds was made, showing that in-plane sigma and pi bonds were relatively more weakly covalent than Tu-out-of-plane bonds. Additionally, it was possible to obtain suitable crystals for X-ray analysis. Suitable crystals of 4,4'-dimethyl-2,2'-bipyridine acetylacetonate copper(II) perchlorate (Cas III ia ClO4) (1) and 4,4'-dimethyl-2,2'-bipyridine methionine copper(II) nitrate (Cas IV met) (2) were obtained and structure solved by X-ray diffraction. The crystallographic data for (Cas III ia ClO4) space group P2(1)/c, a = 7.33 10(10) Angstrom, 3 alpha = 90degrees b = 13.669(3) Angstrom, beta = 95.23(3)degrees, c = 18.973(4) Angstrom, gamma = 90degrees, V = 1893.3(6) Angstrom, z = 4, are presented. For Cas IV met it was found a space group P2(1), a = 1.982(2) Angstrom, alpha = 90degrees, b = 6.952(10) Angstrom, beta = 112.11(3)degrees, c = 13.299(3) Angstrom, gamma = 90degrees, V = 1026.3(3) Angstrom(3), z = 2. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0162-0134 UR - ISI:000221939000018 L2 - EPR spectroscopy;copper(II) mixed chelate complex;UV-vis spectrophotometry;Casiopeina((R));AROMATIC RING STACKING; COMPLEXES; PHENYLALANINE; MONOHYDRATE; HISTIDINE; ION SO - Journal of Inorganic Biochemistry 2004 ;98(6):1045-1053 12631 UI - 3559 AU - Tovmassian HM AU - Plionis M AU - Andernach H AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoNatl Observ Athens, Athens 15236, GreeceUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoTovmassian, HM, Inst Nacl Astrofis Opt & Elect, AP 51 Y 216, Puebla 72000, Mexico TI - The morphological and luminosity content of poor galaxy groups AB - We find that the fraction of early-type galaxies in poor groups (containing from four to 10 members) is a weakly increasing function of the number of the group members and is about 2 times higher than in a sample of isolated galaxies. We also find that the group velocity dispersion increases weakly with the fraction of early-type galaxies. Early-type galaxies in poor groups are brighter in the near-infrared with respect to isolated ones by DeltaM(K)similar to0.75 mag, and to a lesser degree also in the blue (DeltaM(B)similar to0.5 mag). We also find early-type galaxies in groups to be redder than those in the field. These findings suggest that the formation history for early-type galaxies in overdense regions is different from that in underdense regions, and that their formation in groups is triggered by merging processes MH - Greece MH - Mexico|Guanajuato MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225968400005 L2 - galaxies : general;galaxies : kinematics and dynamics;HICKSON COMPACT-GROUPS; CFA SURVEY; CATALOG; EVOLUTION; DYNAMICS; UZC; ENVIRONMENTS; KILOMETERS; CLUSTERS; DENSITY SO - Astrophysical Journal 2004 ;617(2):L111-L114 12632 UI - 5854 AU - Tovmassian HM AU - Tiersch H AU - Navarro SG AU - Chavushyan VH AU - Tovmassian GH AU - Neizvestny S AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoSternwarte Konigsleiten, D-81477 Munich, GermanyUNAM, OAN, Ensenada, Baja California, MexicoRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz, RussiaTovmassian, HM, Inst Nacl Astrofis Opt & Elect, AP 51 & 216, Puebla 72000, Mexico TI - Shakhbazian compact galaxy groups - III. Photometric and spectroscopic study of ShCG 181, ShCG 344, ShCG 361, and ShCG 362 AB - In 1995 we commenced a detailed spectral and photometric study of Shakhbazian compact groups. In this paper the results on groups ShCG 181, ShCG 344, ShCG 361, and ShCG 362 are presented. The redshifts of member galaxies in groups and the radial velocity dispersions, the results of the surface photometry in BVR, the profiles of the surface brightness versus semi-major axis a (or a(1/4)) and the twisting position angle versus semi-major axis of galaxies, virial masses, luminosities and mass-to-luminosity ratios, and the crossing times of groups are given. It is shown that some members of groups are in the process of interaction. On the basis of the results obtained in this and previous works, the general properties of thirteen ShCGs are discussed MH - Germany MH - Mexico|Baja California MH - Mexico|Puebla MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000188936200004 L2 - galaxies : clusters : general;galaxies : interactions;galaxies : kinematics and dynamics;galaxies : photometry;DWARF GALAXIES; OPTICAL OBSERVATIONS; FORNAX CLUSTER; LOOSE GROUPS; X-RAY; MORPHOLOGY; CATALOG; EMISSION; SYSTEMS; COLORS SO - Astronomy & Astrophysics 2004 ;415(3):803-811 12633 UI - 5761 AU - Trallero-Giner C AU - Ulloa SE AU - Lopez-Richard V AD - Univ La Habana, Dept Fis Teor, Havana 10400, CubaOhio Univ, Dept Phys & Astron, Athens, OH 45701, USAOhio Univ, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701, USAUniv Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, BrazilUniv Autonoma Puebla, Inst Fis, Puebla, MexicoTrallero-Giner, C, Univ La Habana, Dept Fis Teor, Havana 10400, Cuba TI - Local density of states in parabolic quantum corrals AB - Atomic manipulation and scanning tunnel microscope experiments on metal surfaces have shown that electronic states in a "quantum corral" can be locally monitored and used to analyze the nonlocal effects of perturbations. We study new corral geometries defined by families of confocal parabolas. General solutions of the Schrodinger equation for the interior problem with Dirichlet (hard wall) boundary conditions are found exactly in terms of zeroes of hypergeometric functions. We show that the Hilbert space of solutions is separated in subspaces with odd and even symmetry. We perform numerical evaluation of the zeroes and study the effects of the parabolic curvatures on the eigenvalues and eigenfunctions of the parabolic quantum corral. The evolution of the local density of states with energy as a function of parabolic corral geometry is also analyzed. We find that under suitable conditions, the distribution of state antinodes can be described as directed intensity beams, which could be used as "quantum beacons" in future generations of "quantum mirage" experiments or optical and acoustic analogs of quantum corrals for the state node distribution MH - Brazil MH - Cuba MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000220814000137 L2 - SCANNING TUNNELING MICROSCOPE; MIRAGES; ATOMS SO - Physical Review B 2004 ;69(11): 12634 UI - 4715 AU - Trang LD AU - Tosun M AD - Univ Aix Marseille 1, CMI, F-13453 Marseille 13, FranceUNAM, Inst Matemat, Cuernavaca 62251, Morelos, MexicoTrang, LD, Univ Aix Marseille 1, CMI, 39 Rue F Joliot Curie, F-13453 Marseille 13, France TI - Combinatorics of rational singularities AB - A normal surface singularity is rational if and only if the dual intersection graph of a desingularization satisfies some combinatorial properties. In fact, the graphs defined in this way are trees. In this paper we give geometric features of these trees. In particular, we prove that the number of vertices of valency greater than or equal to 3 in the dual intersection tree of the minimal desingularization of a rational singularity of multiplicity m greater than or equal to 3 is at most m - 2 MH - France MH - Mexico|Morelos PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0010-2571 UR - ISI:000223260800006 L2 - classification of rational singularities;topology of singularities;dual graph;glueing of rational trees;SURFACE SINGULARITIES; CURVES SO - Commentarii Mathematici Helvetici 2004 ;79(3):582-604 12635 UI - 4136 AU - Trejo LW AU - Santos R AU - Hau E AU - Olivera L AU - Anderson S AU - Belmar R AD - Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Merida 97000, Yucatan, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City, DF, MexicoUniv London Wye Coll, Imperial Coll, Ashford TN25 5AH, Kent, EnglandTrejo, LW, Univ Autonoma Yucatan, Fac Med Vet & Zootecn, Apartado Postal 4-116 Itzimna, Merida 97000, Yucatan, Mexico TI - Utilisation of mucuna beans (Mucuna pruriens (L.) DC ssp deeringianum (Bart) Hanelt) to feed growing broilers AB - Performance of broilers fed on diets containing mucuna beans (MB) (Mucuna pruriens (L.) DC ssp. deeringianum (Bart) Hanelt) with different treatments were studied in three experiments. First experiment: three sorghum diets using 0 and 280g/kg of MB raw or soaked were evaluated. Second experiment: three sorghum diets using 0 and 280g/kg of MB raw or boiled were evaluated. Third experiment: six maize diets: maize only, three diets containing 280g/kg of MB raw, soaked or boiled, one containing soybean and a balanced diet (control) were evaluated. Experiment one: the birds fed on the 0g MB/kg showed a higher live weight gain (LWG) and a lower feed:gain ratio (FG) (p < 0.01) than birds fed on the MB diets. There were no differences for any of the variables studied between the birds fed on the MB diets. Experiment two: the birds fed on the 0g MB/kg performed better (p < 0.01) than birds fed on the MB diets. However, birds fed on the boiled MB diet had a higher LWG and a lower FG (p < 0.01) than birds fed on the raw and soaked MB diet. Experiment three: the birds fed on the control diet obtained a higher LWG (p < 0.01) than birds fed on the remainder treatments. The birds fed on the raw MB diet had a lower FG (p < 0.01) than birds on the remainder treatments. However, birds fed on the boiled MB had a higher LWG and feed intake than birds fed on raw and soaked MB diets and only maize diet (p < 0.01), but, lower (p < 0.01) in comparison to birds fed on the soybean diet. The birds on the raw and soaked MB diets performed worst (p < 0.01), even in comparison to birds fed on only maize (p < 0.01). The results from these experiments indicated that inclusion of 280g MB/kg in the diet affected adversely the poultry performance. However, utilisation of MB boiled improved the broilers performance compared to birds fed on the raw and soaked MB diets MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - KASSEL: KASSEL UNIV PRESS GMBH RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary U5 - J;Article AV - English IS - 0041-3186 UR - ISI:000224527200005 L2 - broilers;mucuna;performance;raw;soaked;boiled;Mucuna pruriens ssp.;deeringianum SO - Journal of Agriculture and Rural Development in the Tropics and Subtropics 2004 ;105(2):155-164 12636 UI - 5696 AU - Trevino CL AU - Felix R AU - Castellano LE AU - Gutierrez C AU - Rodriguez D AU - Pacheco J AU - Lopez-Gonzalez I AU - Gomora JC AU - Tsutsumi V AU - Hernandez-Cruz A AU - Fiordelisio T AU - Scaling AL AU - Darszon A AD - UNAM, Inst Biotechnol, Dept Genet Dev & Mol Physiol, Cuernavaca 62210, Morelos, MexicoIPN, CINVESTAV, Dept Physiol Biophys & Neurosci, Mexico City 07738, DF, MexicoLa Salle Univ, Sch Med, Mexico City, DF, MexicoIPN, CINVESTAV, Dept Expt Pathol, Mexico City 07738, DF, MexicoUNAM, Inst Cell Physiol, Dept Biophys, Mexico City, DF, MexicoNew Mexico State Univ, Dept Chem & Biochem, Las Cruces, NM 88003, USADarszon, A, UNAM, Inst Biotechnol, Dept Genet Dev & Mol Physiol, Avenida Univ 2001,Col Cham, Cuernavaca 62210, Morelos, Mexico TI - Expression and differential cell distribution of low-threshold Ca2+ channels in mammalian male germ cells and sperm AB - Numerous sperm functions including the acrosome reaction (AR) are associated with Ca2+ influx through voltage-gated Ca2+ (Ca-V) channels. Although the electrophysiological characterization of Ca2+ currents in mature sperm has proven difficult, functional studies have revealed the presence of lowthreshold (Ca(V)3) channels in spermatogenic cells. However, the molecular identity of these proteins remains undefined. Here, we identified by reverse transcription polymerase chain reaction the expression of Ca(V)3.3 mRNA in mouse male germ cells, an isoform not previously described in these cells. Immunoconfocal microscopy revealed the presence of the three Ca(V)3 channel isoforms in mouse spermatogenic cells. In mature mouse sperm only Ca(V)3.1 and Ca(V)3.2 were detected in the-head, suggesting its participation in the AR. Ca(V)3.1 and Ca(V)3.3 were found in the principal and the midpiece of the flagella. All Ca(V)3 channels are also present in human sperm, but only to a minor extent in the head. These findings were corroborated by immunogold transmission electron microscopy. Tail localization of Ca(V)3 channels suggested they may participate in motility, however, mibefradil and gossypol concentrations that inhibit Ca(V)3 channels did not significantly affect human sperm motility. Only higher miliefradil doses that can block high-threshold (HVA) Cav channels caused small but significant motility alterations. Antibodies to HVA channels detected Ca(V)1.3 and Ca(V)2.3 in human sperm flagella. (C) 2004 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 21 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000220773200017 L2 - Ca2+ channel;acrosome reaction;sperm motility;gossypol;mibefradil;MOUSE SPERMATOGENIC CELLS; CALCIUM-CHANNEL; ACROSOME REACTION; FERTILIZING-CAPACITY; GENE FAMILY; IDENTIFICATION; ALPHA-1H; MOTILITY; ENTRY; LOCALIZATION SO - Febs Letters 2004 ;563(1-3):87-92 12637 UI - 3259 AU - Trigunait A AU - Parrot M AU - Pulinets S AU - Li F AD - CNRS, Lab Phys & Chim Environm, F-45071 Orleans, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoParrot, M, CNRS, Lab Phys & Chim Environm, F-45071 Orleans, France TI - Variations of the ionospheric electron density during the Bhuj seismic event AB - Ionospheric perturbations by natural geophysical activity, such as volcanic eruptions and earthquakes, have been studied since the great Alaskan earthquake in 1964. Measurements made from the ground show a variation of the critical frequency of the ionosphere layers before and after the shock. In this paper, we present an experimental investigation of the electron density variations around the time of the Bhuj earthquake in Gujarat, India. Several experiments have been used to survey the ionosphere. Measurements of fluctuations in the integrated electron density or TEC (Total Electron Content) between three satellites (TOPEX-POSEIDON, SPOT2, SPOT4) and the ground have been done using the DORIS beacons. TEC has been also evaluated from a ground-based station using GPS satellites, and finally, ionospheric data from a classical ionospheric sounder located close to the earthquake epicenter are utilized. Anomalous electron density variations are detected both in day and night times before the quake. The generation mechanism of these perturbations is explained by a modification of the electric field in the global electric circuit induced during the earthquake preparation MH - France MH - Mexico|Distrito Federal PB - KATLENBURG-LINDAU: EUROPEAN GEOSCIENCES UNION RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0992-7689 UR - ISI:000226831100010 L2 - ionosphere;ionospheric disturbances;radio;science;ionospheric physics;history of geophysics;seismology;STRONG EARTHQUAKES; TEC MEASUREMENTS; DISTURBANCES; ATMOSPHERE; TOPEX/POSEIDON; VARIABILITY; RADON SO - Annales Geophysicae 2004 ;22(12):4123-4131 12638 UI - 4414 AU - Trinidad MA AU - Curiel S AU - Torrelles JM AU - Rodriguez LF AU - Canto J AU - Gomez JF AU - Patel N AU - Ho PTP AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCSIC, Inst Ciencias Espacio, E-08034 Barcelona, SpainInst Estudis Espacials Catalunya, E-08034 Barcelona, SpainUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoINTA, Lab Astrofis Espacial & Fis Fundamental, E-28080 Madrid, SpainHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USATrinidad, MA, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1, Puebla 72840, Mexico TI - Multiple outflows in the LkH alpha 234 region AB - We report results of radio continuum (1.3 and 3.6 cm) and H2O maser line observations, carried out with the Very Large Array (VLA) in its A configuration, toward the star-forming region LkHalpha 234. We detected five radio continuum sources (VLA 1, VLA 2, VLA 3A, VLA 3B, and LkHalpha 234) in a region of similar or equal to50" (similar or equal to5000 AU), of which three were previously unknown (VLA 1, VLA 2, and VLA 3B). VLA 3A and VLA 3B seem to form a close (similar or equal to220 AU) binary system. Their elongated morphologies and positive spectral indices suggest that both VLA 3A and VLA 3B could be thermal radio jets. In addition, we detected three clusters of water masers, which are spatially associated with VLA 1, VLA 2, and VLA 3B. Based on the analysis of the distribution of the water masers and the characteristics of the continuum emission, we favor the new radio continuum source VLA 2 as the exciting source of the large-scale CO/[S II] outflow observed in the region. Moreover, we find that the multiple outflows observed in the region share a similar orientation. Finally, our data confirm that there is no evidence indicating that the Herbig Be star LkHalpha 234 is driving any of the outflows in the region MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Puebla MH - Spain MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000224074400035 L2 - ISM : individual (LkH alpha 234);ISM : jets and outflows;masers;stars : formation;stars : pre-main-sequence;YOUNG STELLAR OBJECTS; RADIO-CONTINUUM EMISSION; HERBIG-HARO OBJECTS; CEPHEUS-A HW2; WATER MASERS; H2O MASER; MOLECULAR OUTFLOWS; EXCITING SOURCES; VLA OBSERVATIONS; STARS SO - Astrophysical Journal 2004 ;613(1):416-423 12639 UI - 5738 AU - Tripathi SC AU - Sayre KD AU - Kaul JN AU - Narang RS AD - Directorate Wheat Res, Karnal 132001, Haryana, IndiaCIMMYT, Wheat Programme, Mexico City 06600, DF, MexicoPAU, Ludhiana, Punjab, IndiaTripathi, SC, Directorate Wheat Res, Post Box 158, Karnal 132001, Haryana, India TI - Lodging behavior and yield potential of spring wheat (Triticum aestivum L.): effects of ethephon and genotypes AB - Crop lodging is a chronic constraint, commonly limiting irrigated spring wheat yields. Cultivar selection and use of growth regulators are the two factors that can alter lodging incidence to a significant extent. In this study, lodging behavior and yield potential for 16 spring wheat (Triticum aestivum L.) genotypes were studied under disease-free, irrigated conditions at the CIMMYT (Centro Internacional de Mejoramiento de Maiz y Trigo) experiment station near Ciudad Obregon, Sonora, Mexico, during 1997-1998 and 1998-1999. For the conventional planting system, two additional treatments were implemented, one using support nets to eliminate lodging and the other by applying the growth regulator, ethephon, to control lodging. In both years, lodging occurred late (25-30 days after anthesis) but significant grain yield reductions for lodging susceptible genotypes were observed. The Indian cultivar, HD 2329, and the Mexican advanced line, Super Seri, recorded maximum grain yield loss (7.6-8.9%) due to lodging. Ethephon (480 g ha(-1)) application controlled lodging by reducing plant height but also decreased average grain yield by 8.3%, which was primarily associated with a significant reduction in number of kernels per spike. Interaction between management practices (with and without ethephon) and genotypes was significant for grain yield, HI, kernel weight and kernels per spike but non-significant for biomass and spikes per Square meter. Super Seri produced the highest yield across all management practices. This genotype possesses the translocation carrying the Lr19 gene, which likely contributed to its higher grain yield (10-12%) when compared to the near isogenic cultivar, Seri 82, which is devoid of the Lr19 gene. Therefore, the incorporation of this gene into other high yielding semi-dwarf wheat genotypes may enhance wheat yield in addition to providing resistance to leaf rust. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000220837900008 L2 - spring wheat;lodging behavior;netting;yield;ethephon;growth regulator;Lr19 gene;PLANT SPACING INFLUENCE; NEW-SOUTH-WALES; WINTER-WHEAT; GROWTH-REGULATORS; IRRIGATED WHEAT; SOWING DATE; NITROGEN; CULTIVARS SO - Field Crops Research 2004 ;87(2-3):207-220 12640 UI - 4092 AU - Tritlla J AU - Camprubi A AU - Morales-Ramirez JM AU - Iriondo A AU - Corona-Esquivel R AU - Gonzalez-Partida E AU - Levresse G AU - Carrillo-Chavez A AD - Univ Nacl Autonoma Mexico, Ctr Geociencias, Santiago De Queretaro 76230, Queretaro, MexicoUniv Colorado, Dept Geol Sci, Boulder, CO 80309, USAUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoTritlla, J, Univ Nacl Autonoma Mexico, Ctr Geociencias, Campus Juriquilla,Carretera Qro SLP Km 15,5, Santiago De Queretaro 76230, Queretaro, Mexico TI - The Ixtacamaxtitlan kaolinite deposit and sinter (Puebla State, Mexico): a magmatic-hydrothermal system telescoped by a shallow paleoaquifer AB - The lxtacamaxtitlan hydrothermal deposit is made up of a succession, from bottom to top, of: (1) a porphyritic subvolcanic body, crosscut by quartz veins, and a stockwork with subordinate sulfides (pyrite and chalcopyrite), showing propylitic alteration haloes overprinting a previous potassic alteration event (biotitization); (2) an overlying, kaolinized lithic-rich rhyolitic tuff; and (3) a layered opal deposit with preserved sedimentary structures. This vertical zonation, coupled with the distribution of the alteration assemblages, lead us to the interpretation of the whole as a porphyry-type deposit grading upwards to a barren, steam-heated, acid-leached, kaolinite blanket with a partially preserved silica sinter on top. Both the fluid inclusion study carried out on the veins and stockwork, and the stable isotopic analyses of the kaolinized bodies, suggest the presence of two major hydrothermal events. The older event is characterized by the occurrence of hot hypersaline fluids (up to 320degreesC and 36 wt% NaCl equivalents), likely of magmatic origin, closely associated with the emplacement of the underlying early Miocene porphyry-type deposit. The later event is characterized by the presence of cooler and dilute fluids (up to 140degreesC and 4 wt% NaCl equivalents) and by advanced argillic alteration close to the paleosurface. The calculated isotopic composition of water in equilibrium with the kaolinitic sequence plots close to and underneath the meteoric water line, partially overlapping the Los Humeros present-day geothermal fluids. This evidence coupled with the petrographic observations suggests that steam-heated phreatic waters altered the lithic-rich rhyolitic tuff. This would have occurred when acid vapors, exsolved from deeper hydrothermal fluids by boiling, reached the local paleowater table and condensed, after a sector collapse that changed the system from lithostatic to hydrostatic conditions MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - USA PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics;Geology U5 - J;Article AV - English IS - 1468-8115 UR - ISI:000224680800006 L2 - argillic alteration;hydrothermal fluids;Ixtacamaxtitlan;kaolinite;Mexico;porphyry-type deposit;silica sinter;stockwork;HYDROGEN ISOTOPE GEOCHEMISTRY; CONVERGENT PLATE BOUNDARIES; CLAY-MINERALS; OXYGEN; EVOLUTION; MINERALIZATION; TEMPERATURE; DEUTERIUM; DISTRICT; EXCHANGE SO - Geofluids 2004 ;4(4):329-340 12641 UI - 4371 AU - Tritlla J AU - Gonzalez-Partida E AU - Levresse G AU - Banks D AU - Pironon J AD - UNAM, Programa Geofluidos, Ctr Geociencias, Juriquilla 76230, Queretaro, MexicoUniv Leeds, Sch Earth Sci, Leeds LS2 9JT, W Yorkshire, EnglandUniv Nancy 1, Fac Sci, CREGU, F-54501 Vandoeuvre Les Nancy, FranceTritlla, J, UNAM, Programa Geofluidos, Ctr Geociencias, Campus Juriquilla AP 15, Juriquilla 76230, Queretaro, Mexico TI - "Fluorite deposits at Encantada-Buenavista, Mexico: products of Mississippi Valley type processes" [Ore Geol. Rev. 23 (2003), 107-124] - a reply MH - United Kingdom MH - France MH - Mexico|Queretaro PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Geology;Mining & Mineral Processing U5 - J;Editorial Material AV - English IS - 0169-1368 UR - ISI:000223968600010 L2 - fluorite;Mississippi Valley-type ores;Encantada-Buenavista;SPAIN SO - Ore Geology Reviews 2004 ;25(3-4):329-332 12642 UI - 4194 AU - Trofimov SY AU - Yakimenko OS AU - Sedov SN AU - Zazovskaya EP AU - Dorofeeva EI AU - Oleinik SA AU - Gorshkova EI AU - Demin VV AD - Moscow MV Lomonosov State Univ, Fac Soil Sci, Moscow 119992, RussiaUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Geog, Moscow 119017, RussiaRussian Acad Sci, Inst Physicochem & Biol Problems Soil Sci, Pushchino 142292, Moscow Oblast, RussiaMoscow MV Lomonosov State Univ, Russian Acad Sci, Inst Soil Sci, Moscow 119992, RussiaTrofimov, SY, Moscow MV Lomonosov State Univ, Fac Soil Sci, Vorobevy Gory, Moscow 119992, Russia TI - Composition and properties of organic matter in the soils of ancient Slavic settlements in the forest zone AB - The composition and properties of organic matter from paleosol horizons and cultural layers of ancient Slavic archaeological monuments Gnezdovo (Smolensk oblast) and Shestovitsy (Chernigov oblast, Ukraine) have been studied. It is shown that the organic matter of cultural layers (habitation deposits) has several specific features favoring its long-term preservation even when deep organomineral horizons cannot be formed. The organic matter of cultural layers is characterized by the accumulation of strongly bound humic acids and humin; their humic acids have a highly condensed and aromatic molecular structure. The rate of mineralization of the organic matter of cultural layers is lower than that of the soil organic matter MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Soil Science U5 - J;Article AV - English IS - 1064-2293 UR - ISI:000224294100003 SO - Eurasian Soil Science 2004 ;37(9):927-936 12643 UI - 5293 AU - Trouillard O AU - guirre-Cruz L AU - Hoang-Xuan K AU - Marie Y AU - Delattre JY AD - Univ Paris 06, Hop La Pitie Salpetriere, Federat Neurol Mazarin, F-75013 Paris, FranceInst Nacl Neurol & Neurocirug, Mexico City, DF, MexicoUniv Paris 06, Hop La Pitie Salpetriere, INSERM, U495, F-75013 Paris, FranceHoang-Xuan, K, Univ Paris 06, Hop La Pitie Salpetriere, Federat Neurol Mazarin, F-75013 Paris, France TI - Parental 19q loss and PEG3 expression in oligodendrogliomas MH - France MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 3 U4 - Oncology;Genetics & Heredity U5 - J;Letter AV - English IS - 0165-4608 UR - ISI:000221978800009 L2 - PREFERENTIAL LOSS; PATERNAL 19Q; NEUROBLASTOMA; ALLELES; GENE SO - Cancer Genetics and Cytogenetics 2004 ;151(2):182-183 12644 UI - 5424 AU - Trujillo-Romero F AU - yala-Ramirez V AU - Marin-Hernandez A AU - Devy M AD - Univ Guanajuato, Salamanca 36730, Gto, Mexico. CNRS, LAAS, F-31077 Toulouse, France TI - Active object recognition using mutual information AB - In this paper, we present the development of an active object recognition system. Our system uses a mutual information framework in order to choose an optimal sensor configuration for recognizing an unknown object. System builds a conditional probability density functions database for some observed features over a discrete set of sensor configurations for a set of interesting objects. Using a sequential decision making process, our system determines an optimal action (sensor configuration) that augments discrimination between objects in our database. We iterate this procedure until a decision about the class of the unknown object can be made. Actions include pan, tilt and zoom values for an active camera. Features include the color patch mean over a region in our image. We have tested on a set composed of 8 different soda bottles and we have obtained a recognition rate of about 95%. Sequential decision length was of 4 actions in the average for a decision to be made MH - France MH - Mexico|Guanajuato T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Articles NT - SEnglishArticle0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600069 SO - 2004 ;():672-678 12645 UI - 5714 AU - Tsolaki AG AU - Hirsh AE AU - DeRiemer K AU - Enciso JA AU - Wong MZ AU - Hannan M AU - de la Salmoniere YOL AU - Aman K AU - Kato-Maeda M AU - Small PM AD - Stanford Univ, Ctr Med, Div Infect Dis & Geog Med, Stanford, CA 94305, USAStanford Univ, Dept Biol Sci, Stanford, CA 94305, USAInst Mexicano Seguro Social, Unidad Invest Med Enfermedades Infecciosas & Para, Mexico City 06725, DF, MexicoSmall, PM, Stanford Univ, Ctr Med, Div Infect Dis & Geog Med, Stanford, CA 94305 USA TI - Functional and evolutionary genomics of Mycobacterium tuberculosis: Insights from genomic deletions in 100 strains AB - To better understand genome function and evolution in Mycobacterium tuberculosis, the genomes of 100 epidemiologically well characterized clinical isolates were interrogated by DNA microarrays and sequencing. We identified 68 different large-sequence polymorphisms (comprising 186,137 bp, or 4.2% of the genome) that are present in H37Rv, but absent from one or more clinical isolates. A total of 224 genes (5.5%), including genes in all major functional categories, were found to be partially or completely deleted. Deletions are not distributed randomly throughout the genome but instead tend to be aggregated. The distinct deletions in some aggregations appear in closely related isolates, suggesting a genomically disruptive process specific to an individual mycobacterial lineage. Other genomic aggregations include distinct deletions that appear in phylogenetically unrelated isolates, suggesting that a genomic region is vulnerable throughout the species. Although the deletions identified here are evidently inessential to the causation of disease (they are found in active clinical cases), their frequency spectrum suggests that most are weakly deleterious to the pathogen. For some deletions, short-term evolutionary pressure due to the host immune system or antibiotics may favor the elimination of genes, whereas longer-term physiological requirements maintain the genes in the population MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: NATL ACAD SCIENCES RP - NOT IN FILE U3 - TC 81 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0027-8424 UR - ISI:000220761200028 L2 - MOLECULAR EPIDEMIOLOGY; HELICOBACTER-PYLORI; GENETIC DIVERSITY; VIBRIO-CHOLERAE; DNA MICROARRAY; IDENTIFICATION; SEQUENCE; REVEALS; SALMONELLA; VIRULENCE SO - Proceedings of the National Academy of Sciences of the United States of America 2004 ;101(14):4865-4870 12646 UI - 5269 AU - Tsu VD AU - Langer A AU - Aldrich T AD - PATH, Seattle, WA, USAPopulat Council, Mexico City, DF, MexicoTsu, VD, PATH, Seattle, WA, USA TI - Postpartum hemorrhage in developing countries: is the public health community using the right tools? AB - Objectives: To identify new and underutilized technologies that may assist in reducing maternal mortality due to obstetric hemorrhage. Methods: Review of published and unpublished literature, including systematic reviews of randomized trials and individual clinical studies. Results: Hemorrhage, primarily postpartum, accounts for approximately 25% of maternal deaths globally. Uterotonic drugs offer great promise for both prevention and management of postpartum hemorrhage (PPH). Other technologies-such as anti-shock garments, umbilical vein injection of oxytocin, and simple anemia detection methods-represent potential new opportunities to reduce PPH-related mortality. Conclusions: Clinical and operational research is needed to answer remaining questions about misoprostol, the antishock garment, and umbilical vein injection of oxytocin for retained placenta. Efforts are needed to ensure the availability of technologies with proven value, such as oxytocin in Uniject(TM) prefilled injection devices. Equally important, technologies and techniques with proven efficacy-such as active management of third-stage labor and aortic compression-must be translated into general use by disseminating the evidence for them, incorporating them into national guidelines and training curricula, and ensuring the availability of supportive supplies and equipment. (C) 2004 International Federation of Gynecology and Obstetrics. Published by Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 10 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0020-7292 UR - ISI:000222058600006 L2 - postpartum hemorrhage;oxytocin;misoprostol;Uniject (TM);third-stage labor;developing countries;RANDOMIZED CONTROLLED-TRIAL; PLACEBO-CONTROLLED TRIAL; HEMOGLOBIN COLOR SCALE; RECTALLY ADMINISTERED MISOPROSTOL; COPPER-SULFATE DENSITOMETRY; 3RD STAGE; ORAL MISOPROSTOL; MATERNAL MORTALITY; RETAINED PLACENTA; INTRAUMBILICAL OXYTOCIN SO - International Journal of Gynecology & Obstetrics 2004 ;85():S42-S51 12647 UI - 5034 AU - Tucker GS AU - Ade PAR AU - Block JJ AU - Devlin M AU - Griffin M AU - Gundersen J AU - Halpern M AU - Hargrave P AU - Hughes D AU - Klein J AU - Mauskopf P AU - Netterfield CB AU - Olmi L AU - Scott D AD - Brown Univ, Dept Phys, Providence, RI 02912, USAUniv Wales Coll Cardiff, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, WalesCALTECH, Jet Prop Lab, Pasadena, CA 91109, USAUniv Penn, Dept Phys & Astron, Philadelphia, PA 19104, USAUniv Miami, Dept Phys, Coral Gables, FL 33126, USAUniv British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, CanadaINAOE, Puebla 72000, MexicoUniv Toronto, Dept Phys, Toronto, ON M5S 1A7, CanadaUniv Puerto Rico, Rio Piedras, PR 00931, USATucker, GS, Brown Univ, Dept Phys, 182 Hope St,Box 1843, Providence, RI 02912 USA TI - The balloon-borne large aperture sub-millimeter telescope AB - The balloon-borne large aperture sub-millimeter telescope (BLAST) is a new instrument to study galaxies at high redshift and to help answer questions about our galaxy and star formation. BLAST will fly from a long duration balloon. The telescope design incorporates a 2-m primary mirror with large-format bolometer arrays operating at 250, 350 and 500 pm with 149, 88 and 43 detectors, respectively. By providing the first sensitive large-area (much greater than 10 deg(2)) sub-mm surveys at these wavelengths, BLAST will address some of the most important galactic and cosmological questions regarding the formation and evolution of stars, galaxies and clusters. Galactic and extragalactic BLAST surveys will do the following: (i) identify large numbers of high-redshift galaxies; (ii) measure photometric redshifts, rest-frame far-infrared luminosities and star formation rates thereby constraining the evolutionary history of the galaxies that produce the far-infrared and sub-mm background; (iii) measure cold pre-stellar sources associated with the earliest stages of star and planet formation; (iv) make high-resolution maps of diffuse galactic emission over a wide range of galactic latitudes. The BLAST long duration balloon experiment will also provide catalogues of 3000-5000 extragalactic sub-mm sources and a much greater than100 deg(2) = sub-mm galactic plane survey which will serve as a legacy to be followed at other wavelengths and resolutions, including sub-arcsecond imaging with the Atacama Large Millimeter Array. (C) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved MH - USA MH - Canada MH - Mexico|Puebla MH - United Kingdom PB - KIDLINGTON: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Aerospace;Astronomy & Astrophysics;Geosciences, Multidisciplinary;Meteorology & Atmospheric Sciences U5 - S;Article AV - English IS - 0273-1177 UR - ISI:000222365800036 L2 - BLAST;scientific ballooning;sub-millimeter surveys;galaxies;STAR-FORMATION; HIGH-REDSHIFT; EVOLUTION SO - Next Generation in Scientific Ballooning 2004 ;33(10):1793-1796 12648 UI - 3802 AU - Tunez I AU - Montilla P AU - Munoz MC AU - Drucker-Colin R AD - Univ Cordoba, Fac Med, Dept Bioquim & Biol Mol, E-14004 Cordoba, SpainUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Neurociencias, Mexico City 04510, DF, MexicoMontilla, P, Univ Cordoba, Fac Med, Dept Bioquim & Biol Mol, Avda Menendez Pidal S-N, E-14004 Cordoba, Spain TI - Effect of nicotine on 3-nitropropionic acid-induced oxidative stress in synaptosomes AB - In this paper, the effect of nicotine on the oxidative changes produced by 3-nitropropionic acid (20 mg/kg i.p./day for 4 days) in striatal and cortical synaptosomes of Wistar rats was studied. The effects of 3-nitropropionic acid were evaluated as changes in the quantity of protein carbonyl groups, lipid peroxidation products, superoxide distumase activity and reduced succinate dehydrogenase activity. All changes were prevented by the pre-injection of nicotine (1.5 mg/kg i.p./day), beginning 4 days before and continuing for 4 days after the first injection of 3-nitropropionic acid. These findings indicate that: (i) 3-nitropropionic acid induces a state of oxidative stress in cortical and striatal synaptosomes and (ii) nicotine prevents oxidative stress induced by 3-nitropropinonic acid. In conclusion, the results show the ability of nicotine to modify neural response to 3-nitropropionic acid with the protective mechanism likely involving the antioxidative processes of nicotine. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000225356600003 L2 - Huntington's disease;nicotine;3-nitropropionica acid;oxidative stress;HUNTINGTONS-DISEASE; MITOCHONDRIAL DYSFUNCTION; NEUROPSYCHIATRIC DISORDERS; PARKINSONS-DISEASE; ANIMAL-MODEL; RAT-BRAIN; IN-VITRO; HALOPERIDOL; RECEPTORS; NEUROTOXICITY SO - European Journal of Pharmacology 2004 ;504(3):169-175 12649 UI - 4004 AU - Uc VH AU - Grand A AU - Vivier-Bunge A AD - PIMAS, Inst Mexicano Petroleo, Mexico City 07730, DF, MexicoCEA Grenoble, Lab Lesions ADN, Serv Chim Inorgan & Biol, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City, DF, MexicoUc, VH, PIMAS, Inst Mexicano Petroleo, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - Stability and selectivity trends in the addition of atomic radicals to xylenes AB - In this work, the reaction of the atomic radicals H, O(P-3), F and Cl with xylenes has been studied using ab initio theoretical methods. The stability of the isomeric adducts is analyzed and rules for the selectivity of addition of the different radicals are discussed. Ipso addition is found to be clearly favored for fluorine. In all cases, positions that are either ortho or ipso to a methyl group yield the most stable adducts, while carbon atoms that are in para positions with respect to the methyl groups seem to be the least susceptible of attack. These preferences contrast with normal addition rules for electrophilic reactants. Estimates of the enthalpy changes at 298 K for the reaction C6H4(CH3)(2) + X --> C6H4(CH3)(2)X are determined for the first time. Values for DeltaH(r) are compared with estimates obtained using Benson's additivity rules. They correlate very well with the atomic radius, the ionization potential, hardness and polarizability of the atoms. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0166-1280 UR - ISI:000224720400026 L2 - atomic radicals;xylenes;atmospheric reactions;radical addition reactions;heats of formation;AROMATIC-HYDROCARBONS; OH-RADICALS; MECHANISM; TOLUENE; KINETICS; PHOTOOXIDATIONS; EXCHANGE; IONS SO - Journal of Molecular Structure-Theochem 2004 ;684(1-3):171-179 12650 UI - 4548 AU - Uchida KI AU - Calvet N AU - Hartmann L AU - Kemper F AU - Forrest WJ AU - Watson DM AU - D'Alessio P AU - Chen CH AU - Furlan E AU - Sargent B AU - Brandl BR AU - Herter TL AU - Morris P AU - Myers PC AU - Najita J AU - Sloan GC AU - Barry DJ AU - Green J AU - Keller LD AU - Hall P AD - Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095, USAUniv Rochester, Dept Phys & Astron, Rochester, NY 14627, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoCALTECH, Jet Prop Lab, Pasadena, CA 91109, USASterrewacht Leiden, NL-2300 Leiden, NetherlandsCALTECH, Spitzer Sci Ctr, Ctr Infrared Proc & Anal, Pasadena, CA 91125, USANatl Opt Astron Observ, Tucson, AZ 85719, USAIthaca Coll, Dept Phys, Ithaca, NY 14850, USAUchida, KI, Cornell Univ, Ctr Radiophys & Space Res, Space Sci Bldg, Ithaca, NY 14853 USA TI - The state of protoplanetary material 10 million years after stellar formation: Circumstellar disks in the TW Hydrae association AB - We have used the Spitzer Space Telescope Infrared Spectrograph to observe seven members of the TW Hya association, the nearest stellar association whose age (similar to10 Myr) is similar to the timescales thought to apply to planet formation and disk dissipation. Only two of the seven targets display infrared excess emission, indicating that substantial amounts of dust still exist closer to the stars than is characteristic of debris disks; however, in both objects we confirm an abrupt short-wavelength edge to the excess, as is seen in disks with cleared-out central regions. The mid-infrared excesses in the spectra of Hen 3-600 and TW Hya include crystalline silicate emission features, indicating that the grains have undergone significant thermal processing. We offer a detailed comparison between the spectra of TW Hya and Hen 3-600, and a model that corroborates the spectral shape and our previous understanding of the radial structure of these protoplanetary disks MH - Mexico|Michoacan MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 44 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000223634300080 L2 - accretion, accretion disks;circumstellar matter;infrared : stars;stars : formation;stars : pre-main-sequence;COMET HALE-BOPP; TAURI STARS; CRYSTALLINE SILICATES; EMISSION; ACCRETION; SPECTRUM; HERBIG; ORIGIN; GRAINS; MODEL SO - Astrophysical Journal Supplement Series 2004 ;154(1):439-442 12651 UI - 3288 AU - Uhlenhopp E AU - Ibarra P AU - Brown C AU - Rodezno LE AU - Padilla EG AU - Slack G AD - Iowa State Univ, Outreach Acad Vet Med & Rural Community Dev, Ames, IA 50011, USAUniv Georgia, Coll Vet Med, Athens, GA 30602, USANatl Serv Anim & Plant Hlth Food Safety & Food Qu, Gen Directorate Anim Hlth, Minist Agr, Rural Dev Fisheries & Food, Mexico City 03230, DF, MexicoUNAM, Fac Vet Med, Mexico City, DF, MexicoOrganismo Int Reg Sanidad Agropecuaria, San Salvador, El SalvadorNatl Inst Anim Agr, Bowling Green, OH, USAUhlenhopp, E, Iowa State Univ, Outreach Acad Vet Med & Rural Community Dev, Rm 16,Bldg 1,VMRI,1802 ELwood Dr, Ames, IA 50011 USA TI - Food supply veterinary medicine: Creating an awareness of livestock security risks MH - El Salvador MH - USA MH - Mexico|Distrito Federal PB - TORONTO: UNIV TORONTO PRESS INC RP - NOT IN FILE U3 - TC 1 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0748-321X UR - ISI:000226618700014 SO - Journal of Veterinary Medical Education 2004 ;31(4):391-400 12652 UI - 4208 AU - Ulloa-Aguirre A AU - Janovick JA AU - Brothers SP AU - Conn PM AD - Oregon Hlth & Sci Univ, Oregon Natl Primate Res Ctr, Beaverton, OR 97006, USAInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoOregon Hlth & Sci Univ, Dept Physiol & Pharmacol, Beaverton, OR, USAOregon Hlth & Sci Univ, Dept Cell & Dev Biol, Beaverton, OR, USAConn, PM, Oregon Hlth & Sci Univ, Oregon Natl Primate Res Ctr, Beaverton, OR 97006 USA TI - Pharmacologic rescue of conformationally-defective proteins: Implications for the treatment of human disease AB - The process of quality control in the endoplasmic reticulum involves a variety of mechanisms which ensure that only correctly folded proteins enter the secretory pathway. Among these are conformation-screening mechanisms performed by molecular chaperones that assist in protein folding and prevent non-native (or misfolded) proteins from interacting with other misfolded proteins. Chaperones play a central role in the triage of newly formed proteins prior to their entry into the secretion, retention, and degradation pathways. Despite this stringent quality control mechanism, gain- or loss-of-function mutations that affect protein folding in the endoplasmic reticulum can manifest themselves as profound effects on the health of an organism. Understanding the molecular, cellular, and energetic mechanisms of protein routing could prevent or correct the structural abnormalities associated with disease-causing misfolded proteins. Rescue of misfolded, "trafficking-defective", but otherwise functional, proteins is achieved by a variety of physical, chemical, genetic, and pharmacological approaches. Pharmacologic chaperones (or "pharmacoperones") are template molecules that may potentially arrest or reverse diseases by inducing mutant proteins to adopt native-type-like conformations instead of improperly folded ones. Such restructuring leads to a normal pattern of cellular localization and function. This review focuses on protein misfolding and misrouting related to various disease states and describes promising approaches to overcoming such defects. Special attention is paid to the gonadotropin-releasing hormone receptor, since there is a great deal of information about this receptor, which has recently emerged as a particularly instructive model MH - Mexico|Distrito Federal MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 73 U4 - Cell Biology U5 - J;Review AV - English IS - 1398-9219 UR - ISI:000224346500002 L2 - conformational disease;gonadotropin-releasing hormone receptor;pharmacological chaperone;pharmacoperone;NEPHROGENIC DIABETES-INSIPIDUS; DOMINANT RETINITIS-PIGMENTOSA; CELL-SURFACE EXPRESSION; GNRH RECEPTOR ANTAGONISTS; RESONANCE ENERGY-TRANSFER; UBIQUITIN-PROTEASOME SYSTEM; CYCLOPHILIN HOMOLOG NINAA; V2 VASOPRESSIN RECEPTORS; DELTA-OPIOID RECEPTOR; A-BINDING-PROTEIN SO - Traffic 2004 ;5(11):821-837 12653 UI - 5733 AU - Ulloa-Aguirre A AU - Janovick JA AU - Leanos-Miranda A AU - Conn PM AD - Oregon Hlth Sci Univ, Oregon Natl Primate Res Ctr, Beaverton, OR 97006, USAInst Mecicano Seguro Social, Res Unit Reprod Med, Mexico City, DF, MexicoOregon Hlth Sci Univ, Dept Physiol & Pharmacol, Portland, OR 97201, USAOregon Hlth Sci Univ, Dept Cell & Dev Biol, Portland, OR 97201, USAUlloa-Aguirre, A, Oregon Hlth Sci Univ, Oregon Natl Primate Res Ctr, 505 NW 185th Ave, Beaverton, OR 97006 USA TI - Misrouted cell surface GnRH receptors as a disease aetiology for congenital isolated hypogonadotrophic hypogonadism AB - GnRH plays an essential and central role in neuroendocrine control of reproductive function. The GnRH receptor is located on the plasma membrane of gonadotrophs, pituitary cells that synthesize the gonadotrophins LH and FSH. This receptor belongs to the superfamily of G protein-coupled receptors, and is preferentially coupled to the G(q/11) protein; its activation by GnRH analogues stimulates the synthesis and release of LH and FSH. Resistance to GnRH by inactivating (loss-of-function) mutations of the human GnRH receptor leads to distinct forms of sporadic or inherited hypogonadotrophic hypogonadism. Although in vitro expression of a number of these mutated GnRH receptors in heterologous systems has shown that these mutations appear to alter several functions of the molecule, including ligand binding, receptor activation or interaction with coupled effectors, recent observations from our laboratory have challenged this view and indicated that protein misfolding and resultant misrouting is a mechanism that, by itself, may lead to loss of function of the human GnRH receptor. In this review we describe the experimental data that led us to this conclusion and how these studies revealed previously unsuspected features of the mutant human GnRH receptor MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 10 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Review AV - English IS - 1355-4786 UR - ISI:000220896800007 L2 - chaperones;GnRH receptor;hypogonadotrophic hypogonadism;pharmacoperone;receptor mutations;GONADOTROPIN-RELEASING-HORMONE; NEPHROGENIC DIABETES-INSIPIDUS; PROTEIN-COUPLED RECEPTORS; SIGNAL-TRANSDUCTION PATHWAYS; RESONANCE ENERGY-TRANSFER; DOMINANT RETINITIS-PIGMENTOSA; NATURALLY-OCCURRING MUTATIONS; ADRENAL HYPOPLASIA CONGENITA; CYCLOPHILIN HOMOLOG NINAA; LINKED KALLMANN-SYNDROME SO - Human Reproduction Update 2004 ;10(2):177-192 12654 UI - 4259 AU - Ulloa R AU - Palma S AU - Silva N AD - Pontificia Univ Catolica Valparaiso, Escuela Ciencias Mar, Valparaiso 1020, ChileCtr Reg Invest Pesquera, Mexico City 70680, DF, MexicoUlloa, R, Pontificia Univ Catolica Valparaiso, Escuela Ciencias Mar, Valparaiso 1020, Chile TI - Relationship between spatial distribution of chaetognaths and oceanographic conditions off Concepcion Bay, Chile AB - The composition, and the temporal vertical and horizontal distribution of chaetognaths off Concepcion Bay, Chile were analyzed from 15 oceanographic stations along three sections perpendicular to the coast in April, June, November and December 1991. Oblique zooplankton tows, using 60-cm diameter Bongo nets with 350-mum mesh, were carried out to a maximum of 200 m depth. Additionally, in November and December, in the three coastal most stations of each section, stratified vertical zooplankton tows were performed in three strata (25-0, 50-25 and 100-50 m) with a WP-2 net, with 350-mum mesh provided with a flowmeter to determine the filtered volume. The community of chaetognaths showed ten species: Sagitta enflata, S. bierii, S. decipiens, S. tasmanica, S. lyra, S. minima, S. planctonis, Krohnitta subtilis, K. pacifica and Eukrohnia hamata. Of these species, S. enflata was the most abundant and frequent in both vertical and oblique samples. In vertical samples, some mesopelagic species were identified, such as E hamata, S. decipiens, S. lyra and S. planctonis. These species were more abundant in November, when the upwelling was more intense. An inverse situation was observed in December, when the abundance of S. enflata, an epiplanktonic species, increased, associated with greater water-column stability. With exception of S. enflata, the other species had not been previously recorded in the vicinity of Concepcion Bay. (C) 2004 Elsevier Ltd. All rights reserved MH - Chile MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Oceanography U5 - J;Article AV - English IS - 0967-0645 UR - ISI:000224267700003 L2 - OCEAN STATION-P; VERTICAL-DISTRIBUTION; BATHYMETRIC DISTRIBUTION; PELAGIC CHAETOGNATHS; SAGITTA-ELEGANS; WATER MASSES; LIFE-HISTORY; PACIFIC; ABUNDANCE; PATTERNS SO - Deep-Sea Research Part Ii-Topical Studies in Oceanography 2004 ;51(6-9):537-550 12655 UI - 6448 AU - Umezawa ES AU - Luquetti AO AU - Levitus G AU - Ponce C AU - Ponce E AU - Henriquez D AU - Revollo S AU - Espinoza B AU - Sousa O AU - Khan B AU - da Silveira JF AD - Univ Sao Paulo, Inst Med Trop Sao Paulo, BR-05403000 Sao Paulo, BrazilUNIFESP, Escola Paulista Med, Dept Microbiol Imunol & Parasitol, Sao Paulo, BrazilUniv Fed Goias, Inst Patol Trop & Saude Publ, Goiania, Go, BrazilInst Invest Engn Genet & Biol Mol, Buenos Aires, DF, ArgentinaSecretaria Salud, Lab Referncia Enfermedad Chagas & Leishmaniasis, Tegucigalpa, HondurasUniv Simon Bolivar, Dept Ciencias Biol, Caracas, VenezuelaSeladis, Inst Serv, Lab Diagnost & Invest Salud, La Paz, BoliviaUniv Nacl Autonoma Mexico, Dept Inmunol, Inst Invest Biomed, Mexico City 04510, DF, MexicoUniv Panama, Fac Med, Ctr Invest & Diagnost Enfermedades Parasitarias, Panama City, PanamaIAEA, Inst Human Hlth, Vienna, AustriaUmezawa, ES, Univ Sao Paulo, Inst Med Trop Sao Paulo, Av Dr Eneas de Carvalho Aguiar 470, BR-05403000 Sao Paulo, Brazil TI - Serodiagnosis of chronic and acute Chagas' disease with Trypanosoma cruzi recombinant proteins: Results of a collaborative study in six Latin American countries AB - An enzyme-linked immunosorbent assay to diagnose Chagas' disease by a serological test was performed with Trypanosoma cruzi recombinant antigens (JL8, MAP, and TcPo). High sensitivity (99.4%) and specificity (99.3%) were obtained when JL8 was combined with MAP (JM) and tested with 150 serum samples from chagasic and 142 nonchagasic individuals. Moreover, JM also diagnosed 84.2% of patients in the acute phase of T. cruzi infection MH - Argentina MH - Austria MH - Bolivia MH - Brazil MH - Honduras MH - Mexico|Distrito Federal MH - Panama MH - Venezuela PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000188121800081 L2 - LINKED-IMMUNOSORBENT-ASSAY; EXCRETED-SECRETED ANTIGENS; SEROLOGICAL DIAGNOSIS; BLOOD-DONORS; UNITED-STATES; INFECTION; ANTIBODIES; RISK; IMMUNOASSAY; PEPTIDES SO - Journal of Clinical Microbiology 2004 ;42(1):449-452 12656 UI - 5664 AU - Urban RJ AU - De Sahagun VF AU - Jones ML AU - Swartz SL AU - Mate B AU - Gomez-Gallardo A AU - Guerrero-Ruiz M AD - Univ Autonoma Baja Calif Sur, Dept Biol Marina, La Paz 23081, Baja Calif Sur, MexicoCetacean Res Assoc, Miami, FL 33157, USAOregon State Univ, Hatfield Marine Sci Lab, Newport, OR, USAUrban, RJ, Univ Autonoma Baja Calif Sur, Dept Biol Marina, Km 5-5,Carrtera Sur, La Paz 23081, Baja Calif Sur, Mexico TI - Gray whales with loss of flukes adapt and survive MH - Mexico|Baja California Sur MH - USA PB - LAWRENCE: SOC MARINE MAMMALOGY RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Zoology U5 - J;Article AV - English IS - 0824-0469 UR - ISI:000220806900013 SO - Marine Mammal Science 2004 ;20(2):335-338 12657 UI - 5127 AU - Urbaniak-Kucharczyk A AU - Alvarado FLC AD - Univ Lodz, Dept Solid State Phys, PL-90236 Lodz, PolandInst Politecn Nacl, Escuela Superior Fis & Matemat, Mexico City 07738, DF, MexicoUrbaniak-Kucharczyk, A, Univ Lodz, Dept Solid State Phys, Ul Pomorska 149-153, PL-90236 Lodz, Poland TI - Magnetisation distribution in magnetic bilayers with rough surfaces and interface AB - The influence of the roughness in surface and interface region on the magnetisation distribution and dependence of the Curie temperature and spin-wave parameter on the spacer thickness in a bilayer system is investigated. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700184 L2 - magnetic bilayer;magnetisation;Curie temperature;NONMAGNETIC SPACER; SYSTEM; LAYERS SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():1182-1183 12658 UI - 5670 AU - Urbic T AU - Vlachy V AU - Pizio O AU - Dill KA AD - Univ Ljubljana, Fac Chem & Chem Technol, Ljubljana 1000, SloveniaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoUniv Calif San Francisco, Dept Pharmaceut Chem, San Francisco, CA 94143, USAVlachy, V, Univ Ljubljana, Fac Chem & Chem Technol, Askerceva 5, Ljubljana 1000, Slovenia TI - Water-like fluid in the presence of Lennard-Jones obstacles: predictions of an associative replica Ornstein-Zernike theory AB - What are the properties of water in the presence of a 'sea' of inert obstacles? This question arises because biological cells are highly crowded media. and it is of interest to know the properties of water inside them. It also arises for understanding water in confined molecular environments and for mixtures of water with non-polar solutes. We study two-dimensional Mercedes-Benz (MB) water that is freely mobile in a disordered, but fixed, matrix of Lennard-Jones disks. We use the associative replica Ornstein-Zernike equations supplemented by the corresponding hypernetted chain approximation, and we tested the theory using Monte Carlo simulations. We find that the structure of model water is perturbed by the presence of the obstacles. When the density of obstacles is small. the obstacles induce an increased ordering and 'hydrogen bonding' of the MB model molecules and increased compressibility. relative to pure fluid, in agreement with previous theoretical and experimental studies. However, interestingly, high obstacle densities reduce MB water structuring, 'hydrogen bonding', and compressibility, because the obstacles interfere so extensively with all the possible ways that the fluid can form good 'hydrogen bonding' networks. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Slovenia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0167-7322 UR - ISI:000221002800010 L2 - model of water;partly quenched system;Lennard-Jones obstacles;replica Ornstein-Zernike integral equation;hypernetted chain approximation;INTEGRAL-EQUATION THEORY; DISORDERED POROUS-MEDIA; ION-ION CORRELATIONS; DIRECTIONAL ATTRACTIVE FORCES; BONDING SITES MODEL; ELECTROLYTE-SOLUTIONS; 2-DIMENSIONAL MODEL; COMPUTER-SIMULATIONS; NEUTRON-DIFFRACTION; ARBITRARY MATRICES SO - Journal of Molecular Liquids 2004 ;112(1-2):71-80 12659 UI - 3720 AU - Urcid G AU - Ritter GX AU - Iancu L AD - INAOE, Opt Dept, Tonantzintla 72000, Mexico. Univ Florida, CISE Dept, Gainesville, FL 32611, USA TI - Single layer morphological Perceptron solution to the N-bit parity problem AB - Morphological perceptrons use a lattice algebra approach to learn and classify a set of patterns. Dendritic structure combined with lattice algebra operations have properties that are completely different than those of traditional perceptron models. In the present paper, we focus our attention in single layer morphological perceptrons that classify correctly the parity of all bit strings of length n, as a one-class pattern recognition problem. The n-bit parity problem is the n-dimensional extension of the classic XOR problem in the Euclidean plane and is commonly used as a difficult benchmark to test the performance of training algorithms in artificial neural networks. We present results for values of n up to 10, obtained with a training algorithm based on elimination MH - Mexico|Puebla MH - USA T3 - PROGRESS IN PATTERN RECOGNITIONLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - ON REQUEST (04/14/08) U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlegurcid@inaoep.mx ritter@cise.ufl.edu liancu@cise.ufl.edu0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBE01 AV - English IS - 0302-9743 UR - ISI:000225085900021 SO - 2004 ;():171-178 12660 UI - 4881 AU - Urena A AU - Martinez EE AU - Rodrigo P AU - Gil L AD - Univ Rey Juan Carlos, Dept Tecnol Quim Ambiental & Mat, Escuela Super Ciencias Expt & Tecnol, Madrid 28933, SpainUniv Autonoma San Luis Potosi, Inst Met, Fac Ingn, San Luis Potosi 78210, MexicoUrena, A, Univ Rey Juan Carlos, Dept Tecnol Quim Ambiental & Mat, Escuela Super Ciencias Expt & Tecnol, Madrid 28933, Spain TI - Oxidation treatments for SiC particles used as reinforcement in aluminium matrix composites AB - The present research is centred on the application of oxidation treatments to SiC particles to improve the casting processability of Al-SiC composites by means of a chemical interface control. If a continuous SiO2 layer is generated on the particle surface, the reinforcement particles can be incorporated in a molten aluminium matrix, and the degrading reaction of Al4C3 formation is replaced by other interfacial reactions which improve wettability, avoid particle consumption and increase interface strength. This work presents an optimisation study of the oxidation treatment conditions for SiC particles to obtain continuous adherent coatings which act as active barriers. The influence of particle sizes and treatment temperatures on the oxidation kinetics and barrier structure were evaluated. The capability of the protective barriers developed in the interfacial control was analysed by means of reactivity tests with molten aluminium, in comparison with unprotected particles. Both effects on local reactivity and mechanical interface properties were studied. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|San Luis Potosi MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 12 U4 - Materials Science, Composites U5 - J;Article AV - English IS - 0266-3538 UR - ISI:000222886200009 L2 - aluminium matrix composites;coating;interfacial strength;LIQUID ALUMINUM; WETTABILITY; CERAMICS; FRACTURE SO - Composites Science and Technology 2004 ;64(12):1843-1854 12661 UI - 4318 AU - Uresti RM AU - Velazquez G AU - Ramirez JA AU - Vazquez M AU - Torres JA AD - Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Reynosa 88700, Tamaulipas, MexicoOregon State Univ, Food Proc Engn Grp, Dept Food Sci & Technol, Corvallis, OR 97331, USAUniv Santiago de Compostela, Area Tecnol Alimentos, Dept Quim Analit, Escuela Politecn Super, Lugo 27002, SpainVazquez, M, Univ Autonoma Tamaulipas, Dept Food Sci & Technol, UAM Reynosa Aztlan, Apdo Postal 1015, Reynosa 88700, Tamaulipas, Mexico TI - Effect of high-pressure treatments on mechanical and functional properties of restructured products from arrowtooth flounder (Atheresthes stomias) AB - Restructured fish products from arrowtooth flounder (Atheresthes stomias), an abundant and subutilized species from the Gulf of Alaska, were obtained by hydrostatic pressure processing (HPP) at 400 and 600 MPa with 0-5 min pressure-holding time. Minced fish meat was massaged with 20 g kg(-1) salt at 10degreesC during 5 min, stuffed in commercial sausage case and HPP-treated. Raw and cooked (90degreesC for 15 min) pressure-treated gels were characterized by changes in mechanical properties (texture profile analysis and punch test), protein solubility, electrophoretic profile, expressible water and color. The mechanical properties of raw fish gels increased with pressure level and pressure-holding time while solubility decreased. Myosin aggregation shown by SDS-PAGE was associated with changes in mechanical and functional properties. The values for mechanical properties of heat-induced gels were higher in cooked pressure-treated samples than in the heat-only control. (C) 2004 Society of Chemical Industry MH - Mexico|Tamaulipas MH - Spain MH - USA PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0022-5142 UR - ISI:000224044300018 L2 - fish;restructured;high hydrostatic pressure;gelling;HIGH HYDROSTATIC-PRESSURE; INDUCED GEL; MICROBIAL TRANSGLUTAMINASE; WASHED MINCE; FISH; SURIMI; MUSCLE; TEMPERATURE; ULTRASTRUCTURE; PROTEINS SO - Journal of the Science of Food and Agriculture 2004 ;84(13):1741-1749 12662 UI - 5999 AU - Uresti RM AU - Tellez-Luis SJ AU - Ramirez JA AU - Vazquez M AD - Univ Autonoma Tamaulipas, UAM Reynosa Aztlan, Dept Food Sci & Technol, Reynosa 88700, Tamaulipas, MexicoUniv Santiago de Compostela, Escuela Politecn Super, Dept Quim Analit, Area Tecnol Alimentos, Lugo 27002, SpainRamirez, JA, PMB 374,501 N Bridge St, Hidalgo, TX 78557, USA TI - Use of dairy proteins and microbial transglutaminase to obtain low-salt fish products from filleting waste from silver carp (Hypophthalmichthys molitrix) AB - Restructured fish products from the filleting waste from silver carp (Hypophthalmichthys molitrix) were obtained using sodium caseinate (M), whey protein concentrate (WPC) (1%) or MTGase (0.3%) at different levels of salt (0%, 1% or 2%). The restructured products were obtained by incubating at 40 degreesC for 60 min and then at 90 degreesC for 20 min. Changes in the mechanical properties were studied by measuring changes in the textural profile analyses, punch test and torsional test analyses and expressible water. The mechanical properties increased when the salt level was also increased. The mechanical properties of non-salted and low-salt products were increased by using dairy proteins. Sodium casemate had a greater effect in improving mechanical properties than WPC. MTGase increased expressible water. The results obtained showed that the mechanical properties of low-salt restructured fish products can be improved by using dairy proteins combined with MTGase, with a slight increase in expressible water. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Tamaulipas MH - Spain MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 13 U4 - Chemistry, Applied;Food Science & Technology;Nutrition & Dietetics U5 - J;Article AV - English IS - 0308-8146 UR - ISI:000220243600016 L2 - fish;restructured;transglutaminase;salt;texture;MYOSIN; MINCE; GUMS SO - Food Chemistry 2004 ;86(2):257-262 12663 UI - 4041 AU - Urraca N AU - Fresan A AU - Camarena B AU - guilar-Garcia A AU - Apiquian R AU - de la Fuente-Sandoval C AU - Meyenberg N AU - Nicolini H AU - Escamilla M AU - Raventos H AU - Medina R AU - Mendoza R AU - Munoz R AU - Ontiveros A AU - Canive J AU - Jerez A AD - Natl Inst Psychiat, Mexico City, DF, MexicoCaracci Med Grp, Mexico City, DF, MexicoGenet Schizophrenia Latino Populat Grp, San Antonio, TX, USA TI - Lack of association of the promoter region of the monoamine oxidase-A gene (MAOA-uVNTR) with violent behavior in schizophrenia MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000223742600310 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2004 ;130B(1):80-80 12664 UI - 4806 AU - Urrutia-Fucugauchi J AU - Morgan J AU - Stoffler D AU - Claeys P AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv London Imperial Coll Sci Technol & Med, London SW7 2AZ, EnglandHumboldt Univ, Nat Hist Museum, D-10099 Berlin, GermanyFree Univ Brussels, Dept Geol, B-1050 Brussels, BelgiumUrrutia-Fucugauchi, J, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - The Chicxulub Scientific Drilling Project (CSDP) MH - Belgium MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal PB - FAYETTEVILLE: METEORITICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Editorial Material AV - English IS - 1086-9379 UR - ISI:000222939300001 L2 - CRETACEOUS-TERTIARY BOUNDARY; PEAK-RING FORMATION; IMPACT STRUCTURE; CRATER SO - Meteoritics & Planetary Science 2004 ;39(6):787-790 12665 UI - 4081 AU - Usov IO AU - Suvorova AA AU - Kudriavtsev YA AU - Suvorov AV AD - Los Alamos Natl Lab, Los Alamos, NM 87545, USAUniv Western Australia, Ctr Microscopy & Microanal, Crawley 6009, AustraliaIPN, CINVESTAV, Dept Ingn Elect SEES, Mexico City 07300, DF, MexicoCree Inc, Durham, NC 27703, USAUsov, IO, Los Alamos Natl Lab, MST-STC, Los Alamos, NM 87545, USA TI - Diffusion of boron in 6H and 4H SiC coimplanted with boron and nitrogen ions AB - The diffusion behavior of boron (B) and nitrogen (N) implanted in 6H and 4H silicon carbide (SiC) samples was investigated using secondary ion mass spectroscopy. The samples were either coimplanted with B and N ions or implanted with each element alone. The annealing was performed at 1700 degreesC for times ranging from 10 to 1800 s in argon ambient or in the vapors of silicon and carbon. Transmission electron microscopy has been used to determine the structural properties of implanted layers after the annealing. The N concentration profiles remained unchanged after the annealing. B atoms showed transient enhanced out- and in-diffusion. The coimplantation reduced the fraction of mobile B atoms participating in out- and in-diffusion processes and resulted in an increase in the density and decrease in size of dislocation loops formed in the implanted layer. The B diffusion coefficients in both SiC polytypes have been determined and a diffusion mechanism has been discussed. (C) 2004 American Institute of Physics. (C) 2004 American Institute of Physics MH - Australia MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000224799300036 L2 - KICK-OUT MECHANISM; IMPLANTED BORON; SILICON-CARBIDE; 4H-SILICON CARBIDE; DEFECTS SO - Journal of Applied Physics 2004 ;96(9):4960-4964 12666 UI - 6102 AU - Vachard D AU - de Dios AF AU - Buitron B AD - Univ Sci & Technol Lille, Lab Paleontol & Paleogeog Paleozo, UFR Sci Terre,UMR 8014, CNRS, F-59655 Villeneuve Dascq, FranceUniv Autonoma Guerrero, Escuela Reg Ciencias Tierra, Taxco, Guerrero, MexicoUniv Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, MexicoVachard, D, Univ Sci & Technol Lille, Lab Paleontol & Paleogeog Paleozo, UFR Sci Terre,UMR 8014, CNRS, Batiment SN5, F-59655 Villeneuve Dascq, France TI - Guadalupian and Lopingian (Middle and Late Permian) deposits from Mexico and Guatemala, a review with new data AB - This work describes stage by stage the biostratigraphy of the Middle to Late Permian in Mexico and Guatemala. Roadian deposits are very poorly represented, as a consequence of tectonic movements at the end of the Kungurian/Leonardian stage. In fact Middle and Late Permian deposits are almost completely lacking in South Mexico and the whole Latin America, due to a probable climatic barrier. The main data concern the Las Delicias sequences from Coahuila, North Mexico, and the Mixteca Terrane, South central Mexico, with some precisions on the Wordian-Capitanian from Los Hornos Puebla) and from Olinald, Guerrero, respectively with the discoveries of Parafusulina sellardsi and Polydiexodina capitanensis. New data are provided on Capitanian mudmounds from Olinald. A hypothetical reconstruction of the different terranes of Mexico at the Pangea stage, is finally presented. (C) 2003 Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Guerrero PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 3 U4 - Paleontology U5 - J;Review AV - English IS - 0016-6995 UR - ISI:000189262500008 L2 - biostratigraphy;Foraminifera;Permian;Mexico;Guatemala;biogeography;NORTHERN MEXICO; PALEOZOIC EVOLUTION; FUSULINIDS; AMERICA; TERRANE; BASIN; RECONSTRUCTION; MOUNTAINS; GULF; SEDIMENTATION SO - Geobios 2004 ;37(1):99-115 12667 UI - 5766 AU - Vadillo-Ortega F AU - Strauss JF AU - Perichart O AU - Buendia G AU - Ibarra I AU - Serrano M AU - Furusho R AU - Ahued R AD - Inst Nacl Perinatol, Direct Res, Mexico City, DF, MexicoUniv Penn, Ctr Res Womens Hlth, Philadelphia, PA 19104, USAUniv Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Genet Nutr, Mexico City 04510, DF, Mexico TI - L-arginine supplementation prevents preeclampsia in a high risk population MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 1071-5576 UR - ISI:000220184500162 SO - Journal of the Society for Gynecologic Investigation 2004 ;11(2):125A-125A 12668 UI - 5312 AU - Vakhania N AD - State Univ Morelos, Fac Sci, Cuernavaca 62210, Morelos, MexicoInst Computat Math, GE-93 Tbilisi, Rep of GeorgiaVakhania, N, State Univ Morelos, Fac Sci, Av Univ 1001, Cuernavaca 62210, Morelos, Mexico TI - Single-machine scheduling with release times and tails AB - We study the problem of scheduling jobs with release times and tails on a single machine with the objective to minimize the makespan. This problem is strongly NP-hard, however it is known to be polynomially solvable if all jobs have equal processing time P. We generalize this result and suggest an O(n(2) log n log P) algorithm for the case when the processing times of some jobs are restricted to either P or 2P MH - Mexico|Morelos MH - Rep of Georgia PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Operations Research & Management Science U5 - J;Article AV - English IS - 0254-5330 UR - ISI:000221882100015 L2 - scheduling algorithm;release time;tail;makespan;MAXIMUM LATENESS; DELIVERY TIMES SO - Annals of Operations Research 2004 ;129(1-4):253-271 12669 UI - 5976 AU - Valadez-Graham V AU - Razin SV AU - Recillas-Targa F AD - Univ Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Gene Biol, Lab Struct & Funct Org Chromosomes, Moscow 119334, RussiaRecillas-Targa, F, Univ Nacl Autonoma Mexico, Dept Mol Genet, Inst Fisiol Celular, Apartado Postal 70-242, Mexico City 04510, DF, Mexico TI - CTCF-dependent enhancer blockers at the upstream region of the chicken alpha-globin gene domain AB - The eukaryotic genome is partitioned into chromatin domains containing coding and intergenic regions. Insulators have been suggested to play a role in establishing and maintaining chromatin domains. Here we describe the identification and characterization of two separable enhancer blocking elements located in the 5' flanking region of the chicken alpha-globin domain, 11-16 kb upstream of the embryonic alpha-type pi gene in a DNA fragment harboring a MAR (matrix attachment region) element and three DNase I hypersensitive sites (HSs). The most upstream enhancer blocking element co-localizes with the MAR element and an erythroid-specific HS. The second enhancer blocking element roughly co-localizes with a constitutive HS. The third erythroid-specific HS present within the DNA fragment studied harbors a silencing, but not an enhancer blocking, activity. The 11 zinc-finger CCCTC-binding factor (CTCF), which plays an essential role in enhancer blocking activity in many previously characterized vertebrate insulators, is found to bind the two alpha-globin enhancer blocking elements. Detailed analysis has demonstrated that mutation of the CTCF binding site within the most upstream enhancer blocking element abolishes the enhancer blocking activity. The results are discussed with respect to special features of the tissue-specific alpha-globin gene domain located in a permanently open chromatin area MH - Mexico|Distrito Federal MH - Russia PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 17 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0305-1048 UR - ISI:000220179700020 L2 - BLOCKING ACTIVITY; INTERGENIC TRANSCRIPTION; REGULATORY ELEMENTS; HISTONE ACETYLATION; PROTEIN CTCF; CHROMATIN; INSULATOR; LOCUS; CELLS; METHYLATION SO - Nucleic Acids Research 2004 ;32(4):1354-1362 12670 UI - 5880 AU - Valadez JG AU - Guengerich FP AD - Vanderbilt Univ, Sch Med, Dept Biochem, Nashville, TN 37232, USAVanderbilt Univ, Sch Med, Ctr Mol Toxicol, Nashville, TN 37232, USAIPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioingn, Mexico City 07360, DF, MexicoGuengerich, FP, Vanderbilt Univ, Sch Med, Dept Biochem, 638 Robinson Res Bldg,23rd & Pierce Ave, Nashville, TN 37232 USA TI - S-(2-chloroethyl)glutathione-generated p53 mutation spectra are influenced by differential repair rates more than sites of initial DNA damage AB - Several steps occur between the reaction of a chemical with DNA and a mutation, and each may influence the resulting mutation spectrum, i.e. nucleotides at which the mutations occur. The half-mustard S-(2-bromoethyl) glutathione is the reactive conjugate implicated in ethylene dibromide-induced mutagenesis attributed to the glutathione-dependent pathway. A human p53-driven Ade reporter system in yeast was used to study the factors involved in producing mutations. The synthetic analog S-(2-chloroethyl) glutathione was used to produce DNA damage; the damage to the p53 exons was analyzed using a new fluorescence-based modification of ligation-mediated polymerase chain reaction and an automated sequencer. The mutation spectrum was strongly dominated by the G to A transition mutations seen in other organisms with S-(2-chloroethyl) glutathione or ethylene dibromide. The mutation spectrum clearly differed from the spontaneous spectrum or that derived from N-ethyl,N-nitrosourea. Distinct differences were seen between patterns of modification of p53 DNA exposed to the mutagen in vitro versus in vivo. In the four p53 exons in which mutants were analyzed, the major sites of mutation matched the sites with long half-lives of repair much better than the sites of initial damage. However, not all slowly repaired sites yielded mutations in part because of the lack of effect of mutations on phenotype. We conclude that the rate of DNA repair at individual nucleotides is a major factor in influencing the mutation spectra in this system. The results are consistent with a role of N-7-guanyl adducts in mutagenesis MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000220478500021 L2 - DOSE-DEPENDENT DIFFERENCES; LIGATION-MEDIATED PCR; GUANINE PHOSPHORIBOSYLTRANSFERASE GENE; BENZOPYRENE DIOL EPOXIDE; UV-INDUCED MUTAGENESIS; FUNCTIONAL ASSAY; ALKYLATING-AGENTS; SKIN-CANCER; TRANSVERSION MUTATIONS; MOLECULAR EPIDEMIOLOGY SO - Journal of Biological Chemistry 2004 ;279(14):13435-13446 12671 UI - 3665 AU - Valdes-Galicia JF AU - Muraki Y AU - Tsujihara H AU - Sako T AU - Musalem I AU - Hurtado A AU - Gonzalez LX AU - Matsubara Y AU - Watanabe K AU - Hirano N AU - Tateiwa N AU - Shibata S AU - Sakai T AD - Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, MexicoNagoya Univ, Solar Terrestrial Environm Lab, Nagoya, Aichi 4648601, JapanChubu Univ, Dept Engn, Kasugai, Aichi 4878501, JapanNihon Univ, Coll Ind Technol, Narashino, Chiba 2750005, JapanValdes-Galicia, JF, Natl Autonomous Univ Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - An improved solar neutron telescope installed at a very high altitude in Mexico AB - The detection of solar neutrons on the Earth's surface provides us with important information on the particle acceleration mechanism to high energies at the solar surface. In order to understand the acceleration mechanism of ions at the solar surface, it is essential to measure the energy of solar neutrons. A new detector that can measure the energy and arrival direction of neutrons was constructed on the Sierra Negra Volcano at an altitude of 4580 in a.s.l., in Mexico. In this paper we describe the scientific purpose of the experiment, details of the detector characteristics, numerical simulations carried out to estimate its sensitivity and an electronic novelty used for the DAQ We also present some of the data obtained at the Sierra Negra station. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000225623800007 L2 - neutron detectors;solar neutrons;directional detectors;detector simulation;LARGE FLARE SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2004 ;535(3):656-664 12672 UI - 5092 AU - Valdes-Gonzalez RA AU - Dorantes LM AU - Garibay GN AU - Bracho E AU - Teran L AU - Silva L AU - Valencia P AU - Copeman L AU - White DJG AD - Hop Infantil Mexico, Mexico City, DF, MexicoUniv Western Ontario, Robarts Res Inst, London, ON N6A 3K7, Canada TI - Co-transplantation of porcine islets with sertoli cells in type 1 diabetic patients produces atypical humoral immune responses as assed by elicited anti-pig antibodies MH - Canada MH - Mexico|Distrito Federal PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 0 U4 - Surgery;Transplantation U5 - J;Meeting Abstract AV - English IS - 1600-6135 UR - ISI:000221322501435 SO - American Journal of Transplantation 2004 ;4():553-553 12673 UI - 4449 AU - Valdes-Martinez J AU - Hernandez-Ortega S AU - Rubio M AU - Li DT AU - Swearingen JK AU - Kaminsky W AU - Kelman DR AU - West DX AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoIllinois State Univ, Dept Chem, Normal, IL 61761, USAUniv Washington, Dept Chem 351700, Seattle, WA 98195, USAValdes-Martinez, J, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Study of the sulfur atom as hydrogen bond acceptor in N(2)-pyridylmethyl-N-arylthioureas AB - The hydrogen acceptor capability of the sulfur atom in the biologically relevant N-2-pyridylmethyl-N'-arilthioureas was explored. N-2-Pyridylmethyl thioreas were selected to avoid the formation of intramolecular six-membered hydrogen-bonded ring. The compounds studied were N-2-pyridylmethyl-N'-phenylthiourea (1), N-2-pyridylmethyl-N'-2-methoxythiourea (2), N-2-pyridylmethyl-N'-4-methoxyphenylthiourea (3), and N-2-pyridylmethyl-N'-4-bromophenylthiourea (4). 1 crystallizes in the monoclinic space group P2(1)/c, with a = 7.419(1) Angstrom, b = 18.437(2) Angstrom, c = 9.656(1) Angstrom, beta = 106.277(6)degrees, V = 1267.8(3) Angstrom(3), Z = 4.2 crystallizes in the monoclinic space group P2(1)/c, with a = 8.064(2) Angstrom, b = 18.382(7) Angstrom, c = 9.865(5) Angstrom, beta = 97.81(3)degrees, V = 1448.8(11) Angstrom(3), Z = 4.3 crystallizes in the monoclinic space group P2(1)/c, with a = 11.472(1) A, b = 13.520(1) Angstrom, c = 10.088(1) Angstrom, beta = 112.60(1)degrees, V = 1444.5(2) Angstrom(3), Z = 4.4 crystallizes in the triclinic space group P-1, with a = 4.583(3) Angstrom, b = 10.263(3) Angstrom, c = 14.396(3) Angstrom, alpha = 77.92( 2)degrees, beta = 88.55(4)degrees, gamma = 80.02(4)degrees, V = 652.1(5) Angstrom(3), Z = 2. Both thiourea N-H groups form intermolecular hydrogen bonds, one with the thione sulfur atom and the other with the pyridine nitrogen atom but the H-bonding schemes are not the same maybe due to the flexibility of the molecules MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 0 U4 - Crystallography;Spectroscopy U5 - J;Article AV - English IS - 1074-1542 UR - ISI:000223916500008 L2 - SH hydrogen bonding;thioureas;crystal engineering;POTENT NONNUCLEOSIDE INHIBITORS; HUMAN IMMUNODEFICIENCY VIRUS-1; HIV-1 REVERSE-TRANSCRIPTASE; RATIONAL DESIGN; THIOUREA; RESISTANT SO - Journal of Chemical Crystallography 2004 ;34(8):533-540 12674 UI - 5067 AU - Valdes-Ramos R AU - Noel SW AU - Anderson AS AU - Vossenaar M AD - UNAM, Fac Med, Mexico City 06760, DF, MexicoCESSIAM, Guatemala City, GuatemalaUniv Dundee, Dundee DD1 4HN, Scotland TI - Variation in alcohol consumption and tobacco use among three social groups in the Mexican state of Yucatan: the concordance project MH - Guatemala MH - Mexico|Distrito Federal MH - United Kingdom PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602306 SO - Faseb Journal 2004 ;18(4):A478-A479 12675 UI - 3705 AU - Valdes A AU - Campillo OA AD - Museum Nat Hist, Los Angeles, CA 90007, USAIPN, Ctr Interdisciplinario Ciencias Marinas, Inst Politecn Nacl, Dept Pesquerias & Biol Marina, La Paz 23090, BA, MexicoValdes, A, Museum Nat Hist, 900 Exposit Blvd, Los Angeles, CA 90007, USA TI - Systematics of pelagic aeolid nudibranchs of the Family Glaucidae (Mollusca, Gastropoda) AB - Specimens of pelagic aeolid nudibranchs of the family Glaucidae, collected from several localities in the Pacific Ocean, were anatomically examined and described. The comparative study of their external morphology and anatomy revealed that the genera Glaucus and Glaucilla share a number of synapomorphies. Maintenance of two sister monotypic genera is irrelevant and does not provide additional information. Thus, Glaucus is regarded as the single valid genus within the family, with two valid species Glaucus atlanticus Forster, 1777 and Glaucus marginatus Forster, 1777. Glaucus marginatus is reported from the northeastern Pacific for the first time and an aberrant specimen of G. atlanticus, with smooth radular teeth, is described. The presence of a penial spine and a penial gland together and the abnormal cleioproct condition in Glaucus Suggests that this taxon could be closely related to Cuthona (Family Tergipedidae) rather than to Facelina and other related groups, as several authors have proposed. However, there is no compelling evidence one way or the other MH - Mexico|Baja California Sur MH - USA PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000225681900003 SO - Bulletin of Marine Science 2004 ;75(3):381-389 12676 UI - 3692 AU - Valdez-Cruz NA AU - Batista CVF AU - Zamudio FZ AU - Bosmans F AU - Tytgat J AU - Possani LD AD - UNAM, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoUniv Louvain, Toxicol Lab, Louvain, BelgiumPossani, LD, UNAM, Inst Biotechnol, Dept Mol Med & Bioproc, Ave Univ,2001 Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Phaiodotoxin, a novel structural class of insect-toxin isolated from the venom of the Mexican scorpion Anuroctonus phaiodactylus AB - A peptide called phaiodotoxin was isolated from the venom of the scorpion Anuroctonus phaiodactylus. It is lethal to crickets, but non toxic to mice at the doses assayed. It has 72 amino acid residues, with a molecular mass of 7971 atomic mass units. Its covalent structure was determined by Edman degradation and mass spectrometry; it contains four disulfide-bridges, of which one of the pairs is formed between cysteine-7 and cysteine-8 (positions Cys63-Cys71). The other three pairs are formed between Cys13-Cys38, Cys23-Cys50 and Cys27-Cys52. Comparative sequence analysis shows that phaiodotoxin belongs to the long-chain subfamily of scorpion peptides. Several genes coding for this peptide and similar ones were cloned by PCR, using cDNA prepared from the RNA of venomous glands of this scorpion. Electrophysiological assays conducted with this toxin in several mammalian cell lines (TE671, COS7, rat GH3 and cerebellum granular cells), showed no effect on Na+ currents. However, it shifts the voltage dependence of activation and inactivation of insect Na+ channels (para/tipE) to more negative and positive potentials, respectively. Therefore, the 'window' current is increased by 225%, which is thought to be the cause of its toxicity toward insects. Phaiodotoxin is the first toxic peptide ever purified from a scorpion of the family Iuridae MH - Belgium MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0014-2956 UR - ISI:000225750800017 L2 - Anuroctonus phaiodactylus;disulfide bridges;insect toxin;Na(+-)channel;scorpion;CENTRUROIDES-NOXIUS HOFFMANN; SODIUM-CHANNELS; NA+-CHANNELS; PARABUTHUS-TRANSVAALICUS; MEMBRANE-PROTEIN; ALPHA-HELIX; NEUROTOXINS; CLONING; SURFACE; SEQUENCE SO - European Journal of Biochemistry 2004 ;271(23-24):4753-4761 12677 UI - 4660 AU - Valdez-Cruz NA AU - Davila S AU - Licea A AU - Corona M AU - Zamudio FZ AU - Garcia-Valdes J AU - Boyer L AU - Possani LD AD - Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62210, Morelos, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Dept Genet Evolut, Mexico City 04510, DF, MexicoCtr Invest Cientif & Educ Ensenada, Dept Aquaculture Marine Biotechnol, Ensenada, Baja California, MexicoUniv Arizona, Hlth Sci Ctr, Arizona Poison & Drug Informat Ctr, Tucson, AZ 85724, USAPossani, LD, Natl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Avenida Univ 2001,Apartado Postal 510-3, Cuernavaca 62210, Morelos, Mexico TI - Biochemical, genetic and physiological characterization of venom components from two species of scorpions: Centruroides exilicauda Wood and Centruroides sculpturatus Ewing AB - Current literature concerning the taxonomic names of two possibly distinct species of scorpions from the genus Centruroides (sculpturatus and/or exilicauda) is controversial. This communication reports the results of biochemical, genetic and electrophysiological experiments conducted with C. exilicauda Wood of Baja California (Mexico) and C. sculpturatus Ewing of Arizona (USA). The chromatographic profile fractionation of the soluble venom from both species of scorpions is different. The N-terminal amino acid sequence for nine toxins of C. exilicauda was determined and compared with those from C. sculpturatus. Lethality tests conducted in mice support the idea that C. exilicauda venom should be expected to be medically less important than C. sculpturatus. Thirteen genes from the venomous glands of the scorpion C. exilicauda were obtained and compared with previously published sequences from genes of the species C. sculpturatus. Genes coding for cytochrome oxidase I and 11 of both species were also sequenced. A phylogenetic tree was generated with this information showing important differences between them. Additionally, the results of electrophysiololgical assays conducted with the venom from both species on the Ca2+-dependent K+-channels, showed significant differences. These results strongly support the conclusion that C. exilicauda and C. sculpturatus are in fact two distinct species of scorpions. (C) 2004 Elsevier SAS. All rights reserved MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0300-9084 UR - ISI:000223381400006 L2 - C. exilicauda;C. sculpturatits;cytochrome oxidase;mitochondrial gene;scorpion toxin;K+-channel;CHANNEL-BLOCKING TOXINS; AMINO-ACID-SEQUENCES; MITOCHONDRIAL-DNA; NOXIUS HOFFMANN; NA+-CHANNELS; CHARYBDOTOXIN; CALIFORNIA; BUTANTOXIN; PEPTIDES; MEXICO SO - Biochimie 2004 ;86(6):387-396 12678 UI - 6176 AU - Valdez-Marquez M AU - Lares ML AU - Ibar VC AU - Gendron D AD - Res & Higher Educ Ctr Ensenada, Dept Ecol, Ensenada 22800, Baja California, MexicoAutonomous Univ Baja Calif, Oceanog Res Inst, Environm Geochem Grp, Ensenada, Baja California, MexicoNatl Polytech Inst, Interdisciplinary Ctr Marine Sci, La Paz 23000, BCS, MexicoLares, ML, CICESE, Dept Ecol, POB 434844, San Diego, CA 92143, USA TI - Chlorinated hydrocarbons in skin and blubber of two blue whales (Balaenoptera musculus) stranded along the Baja California coast MH - Mexico|Baja California MH - Mexico|Baja California Sur MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0007-4861 UR - ISI:000189178400008 L2 - ORGANOCHLORINE CONTAMINANTS; FIN SO - Bulletin of Environmental Contamination and Toxicology 2004 ;72(3):490-495 12679 UI - 5226 AU - Valdez-Martinez E AU - Garduno-Espinosa J AU - Martinez-Salgado H AU - Porter JDH AD - Natl Hlth Res Council, Div Res Evaluat, Mexico City, DF, MexicoMexican Inst Social Secur, Natl Hlth Res Council, Mexico City, DF, MexicoUniv London London Sch Hyg & Trop Med, London WC1E 7HT, EnglandValdez-Martinez, E, Univ London London Sch Hyg & Trop Med, Keppel St, London WC1E 7HT, England TI - Local research ethics committees of the Mexican Institute of Social Security: results of a national survey AB - Objective. To identify the structure, composition and work of the local research ethics committees (LRECs) of the Mexican Institute of Social Security (IMSS) in Mexico. Design. A descriptive cross-sectional study was performed that included all LRECs of the IMSS. Methods. A total of 335 questionnaires coded in advance were posted to each LREC secretary. The requested information was from January to December 2001. Results. The response rate was 100%. Two hundred and thirty-eight (71%) LRECs were reported as 'active' during the evaluation period. Although almost all LRECs were composed of diverse professionals, physicians dominated the LRECs' membership. The rejection rate for research projects was lower than 1 per 1000, and less than half of the LRECs held meetings to issue a report of projects' evaluation. Conclusions. LRECs need to foster good ethical research; implementation of an audit system to examine their work might help improve LRECs' performance and accountability. (C) 2004 The Royal Institute of Public Health. Published by Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0033-3506 UR - ISI:000221988200004 L2 - local research committees;ethics;health research;Mexico;HUMAN-EXPERIMENTATION; AUDIT SO - Public Health 2004 ;118(5):329-336 12680 UI - 4753 AU - Valdivia LF AU - Centurion D AU - Arulmani U AU - Saxena PR AU - Villalon CM AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoUniv Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacobiol, Czda Tenorios 235,Col Granjas Coapa,Deleg Tlalpan, Mexico City 14330, DF, Mexico TI - 5-HT1B receptors, alpha(2A/2C)- and, to a lesser extent, alpha(1)-adrenoceptors mediate the external carotid vasoconstriction to ergotamine in vagosympathectomised dogs AB - It has previously been suggested that ergotamine produces external carotid vasoconstriction in vagosympathectomised dogs via 5-HT1B/1D receptors and alpha(2)-adrenoceptors. The present study has reanalysed this suggestion by using more selective antagonists alone and in combination. Fifty-two anaesthetised dogs were prepared for ultrasonic measurements of external carotid blood flow. The animals were divided into thirteen groups (n=4 each) receiving an i.v. bolus injection of, either physiological saline (0.3 ml/kg; control), or the antagonists SB224289 (300 mug/kg; 5-HT1B), BRL15572 (300 mug/kg; 5-HT1D), rauwolscine (300 mug/kg; alpha(2)), SB224289 + BRL15572 (300 mug/kg each), SB224289 + rauwolscine (300 mug/kg each), BRL15572 + rauwolscine (300 mug/kg each), rauwolscine (300 mug/kg) + prazosin (100 mug/kg; alpha(1)), SB224289 (300 mug/kg) + prazosin (100 mug/kg), SB224289 (300 mug/kg) + rauwolscine (300 mug/kg) + prazosin (100 mug/kg), SB224289 (300 mug/kg) + prazosin (100 mug/kg) + BRL44408 (1,000 mug/kg; alpha(2A)), SB224289 (300 mug/kg) + prazosin (100 mug/kg)+ imiloxan (1,000 mug/kg; alpha(2B)), or SB224289 (300 mug/kg) + prazosin (100 mug/kg) + MK912 (300 mug/kg; alpha(2C)). Each group received consecutive 1-min intracarotid infusions of ergotamine (0.56, 1, 1.8, 3.1, 5.6, 10 and 18 mug/min), following a cumulative schedule. In saline-pretreated animals, ergotamine induced dose-dependent decreases in external carotid blood flow without affecting arterial blood pressure or heart rate. These control responses were: unaffected by SB224289, BRL15572, rauwolscine or the combinations of SB224289 + BRL15572, BRL15572 + rauwolscine, rauwolscine + prazosin, SB224289 + prazosin, or SB224289 + prazosin + imiloxan; slightly blocked by SB224289 + rauwolscine; and markedly blocked by SB224289 + rauwolscine + prazosin, SB224289 + prazosin + BRL44408 or SB224289 + prazosin + MK912. Thus, the cranio-selective vasoconstriction elicited by ergotamine in dogs is predominantly mediated by 5-HT1B receptors as well as alpha(2A/2C)-adrenoceptor subtypes and, to a lesser extent, by alpha(1)-adrenoceptors MH - Mexico|Distrito Federal MH - Netherlands PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 6 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0028-1298 UR - ISI:000223124700006 L2 - BRL44408;ergotamine;dog;external carotid vasoconstriction;imiloxan;MK912;ARTERIOVENOUS ANASTOMOSES; PHARMACOLOGICAL PROFILE; 5-HT1-LIKE RECEPTORS; MIGRAINE; DIHYDROERGOTAMINE; ADRENOCEPTORS; SUBTYPES; CONSTRICTION; ANTAGONISTS; GR127935 SO - Naunyn-Schmiedebergs Archives of Pharmacology 2004 ;370(1):46-53 12681 UI - 5622 AU - Valdivia LF AU - Centurion D AU - Perusquia M AU - Arulmani U AU - Saxena PR AU - Villalon CM AD - CINVESTAV, IPN, Farmacobiol, Mexico City 14330, DF, MexicoUNAM, Inst Invest Biomed, Mexico City 04511, DF, MexicoErasmus Univ, Ctr Med, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, CINVESTAV, IPN, Farmacobiol, Tenorios 235,Col Granjas Coapa, Mexico City 14330, DF, Mexico TI - Pharmacological analysis of the mechanisms involved in the tachycardic and vasopressor responses to the antimigraine agent, isometheptene, in pithed rats AB - The present study set out to investigate the pharmacological profile of the cardiovascular responses induced by the antimigraine agent, isometheptene, in pithed rats. For this purpose, intravenous (i.v.) administration of blocking doses of the antagonists prazosin (alpha(1); 100 mug/kg), rauwolscine (alpha(2); 300 mug/kg), the combination of prazosin (100 mug/kg) plus rauwolscine (300 mug/kg), propranolol (beta; 1000 mug/kg), ritanserin (5-HT2; 100 mug/kg) or equivalent volumes of saline (1 ml/kg) were used. Isometheptene (0.03, 0.1, 0.3, 1 and 3 mg/kg, i.v.) produced dose-dependent increases in heart rate and diastolic blood pressure which were highly reproducible as they remained unaltered after saline. These tachycardic responses to isometheptene remained unaffected after prazosin, rauwolscine, ritanserin or the combination prazosin plus rauwolscine. but were abolished after propranolol. In contrast, the isometheptene-induced vasopressor responses were not significantly modified after the above doses of rauwolscine, ritanserin or propranolol, but were markedly blocked after prazosin or the combination of prazosin plus rauwolscine; the latter blockade did not significantly differ from that produced by prazosin alone. Interestingly, in rats pretreated intraperitoneally (i.p.) with reserpine (5 mg/kg; -24 h), isometheptene-induced tachycardic responses were abolished whereas the corresponding vasopressor responses were markedly attenuated and subsequently blocked by prazosin. It is concluded that isometheptene-induced tachycardic responses seem to involve only an indirect (tyramine-like action) mechanism mediated by beta-adrenoceptors, whilst the corresponding vasopressor responses are mediated by a predominantly indirect (tyramine-like action), as well as a minor direct (alpha(1)-adrenoceptors), sympathomimetic mechanism. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0024-3205 UR - ISI:000221070800004 L2 - alpha-adrenoceptors;beta-adrenoceptors;blood pressure;heart rate;isometheptene;ALPHA-ADRENOCEPTORS; MIGRAINE; HEADACHE; ALPHA-1-ADRENOCEPTORS; DICHLORALPHENAZONE; ACETAMINOPHEN; COMBINATION; RECEPTORS; SUBTYPES; SYSTEM SO - Life Sciences 2004 ;74(26):3223-3234 12682 UI - 4585 AU - Valdivieso AL AU - Cervantes TC AU - Song S AU - Cabrera AR AU - Laskowski JS AD - Univ Autonoma San Luis Potosi, Inst Met, San Luis Potosi 78210, MexicoUniv British Columbia, Dept Min, Vancouver, BC V6T 1Z4, CanadaValdivieso, AL, Univ Autonoma San Luis Potosi, Inst Met, Ave Sierra Leona 50, San Luis Potosi 78210, Mexico TI - Dextrin as a non-toxic depressant for pyrite in flotation with xanthates as collector AB - Depression of pyrite flotation by dextrin has been investigated through adsorption, electrokinetic and microflotation studies in systems open to the atmosphere. Adsorption of dextrin takes place through specific interaction with ferric oxyhydroxide species that result from the oxidation of pyrite surface. Dextrin shows an isoelectric point at pH 4 and pyrite does at pH 6.4. Within this pH range adsorption is suggested to be promoted by electrostatic interactions. Coadsorption of dextrin and isopropyl xanthate occurs on the surface of pyrite and is explained to happen through distinct mechanisms taking into account the heterogeneous nature of the surface. It is likely that dextrin depresses pyrite by enveloping the dixanthogen resulting from adsorption of xanthate ions. It is shown that dextrin is as effective depressant of pyrite as cyanide. (C) 2004 Elsevier Ltd. All rights reserved MH - Canada MH - Mexico|San Luis Potosi PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Chemical;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 0892-6875 UR - ISI:000223529700004 L2 - sulphide ores;flotation reagents;flotation depressants;environmental;mineral processing;SURFACE OXIDATION; MINERAL SURFACES; ADSORPTION; HYDROXIDES; SYSTEMS SO - Minerals Engineering 2004 ;17(9-10):1001-1006 12683 UI - 4646 AU - Valencia-Flores M AU - Rebollar V AU - Santiago V AU - Orea A AU - Rodriguez C AU - Resendiz M AU - Castano A AU - Roblero J AU - Campos RM AU - Oseguera J AU - Garcia-Ramos G AU - Bliwise DL AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Neurol & Psiquiatria, Clin Trastornos Dormir, Mexico City 14000, DF, MexicoNatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoEmory Univ, Sch Med, Sleep Disorders Ctr, Atlanta, GA, USAValencia-Flores, M, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Neurol & Psiquiatria, Clin Trastornos Dormir, Vasco Quiroga 15, Mexico City 14000, DF, Mexico TI - Prevalence of pulmonary hypertension and its association with respiratory disturbances in obese patients living at moderately high altitude AB - OBJECTIVE: To determine the point prevalence of pulmonary hypertension (PH) and its relationship with respiratory disturbances in obese patients living at moderate altitude. SUBJECTS: A total of 57 obese patients comprised the final sample and consisted of 34 women and 23 men, with a mean age of 42.7+/-12.1 ys and a mean body mass index (BMI) 47.1+/-10.6 kg/m(2) (range from 30.1 to 76.1). The mean living altitude was 2248.7 m, range 2100-2400 m above sea level. MEASUREMENTS: Doppler echocardiography, pulmonary function tests, arterial blood gas analysis, and polysomnography were performed. RESULTS: Data showed that 96.5% of the studied sample had daytime PH defined as calculated systolic pulmonary artery pressure (PSAP) >30 mmHg (mean PSAP = 50, s.d. = 13 mmHg). The severity of diurnal PH was found to be related to the presence of alveolar hypoventilation and BMI. The main risk factor for severity of diurnal PH was hypoventilation with a significant odds ratio (OR) 7.96, 95% CI 1.35-46.84, BMI was (OR 1.12, 95% CI 1.02-1.25) and apnea/hypopnea index was not a predictor of pulmonary hypertension severity (OR 0.99, 95% CI 0.97-1.02). CONCLUSION: We concluded that prevalence of diurnal PH is high in obese patients living at moderate altitude, and that hypoventilation is the main risk factor associated with the severity of pulmonary hypertension MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism;Nutrition & Dietetics U5 - J;Article AV - English IS - 0307-0565 UR - ISI:000223331200012 L2 - obstructive sleep apnea;hypoventilation;pulmonary hypertension;OBSTRUCTIVE SLEEP-APNEA; ARTERIAL-HYPERTENSION; PRESSURE; HEMODYNAMICS; HYPOXEMIA; DIAGNOSIS SO - International Journal of Obesity 2004 ;28(9):1174-1180 12684 UI - 4079 AU - Valencia F AU - Romero AH AU - Kiwi M AU - Ramirez R AU - Toro-Labbe A AD - IPICyT, Adv Mat Dept, San Luis Potosi, MexicoCatholic Univ Chile, Fac Fis, Santiago 6904411, ChileCatholic Univ Chile, Fac Quim, Santiago 6904411, ChileValencia, F, IPICyT, Adv Mat Dept, Camino Presa San Jose,2055 Colonia Lomas 4ta Secc, San Luis Potosi, Mexico TI - Ab initio study of cubyl chains and networks AB - The spatial arrangements and physical properties of one- and two-dimensional structures, based on the amazing cubane (C8H8) molecule, are investigated in detail. In particular, we compute the electronic structure, both by first principle calculations and by semiempirical methods. The elastic and vibrational properties are evaluated as well. All these results are compared with those of the single cubane molecule, in order to elucidate the influence of dimensionality. (C) 2004 American Institute of Physics MH - Chile MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000224798900058 L2 - SOLID CUBANE; ELECTRONIC-PROPERTIES; NEUTRON-SCATTERING; SPECTRA; DENSITY SO - Journal of Chemical Physics 2004 ;121(18):9172-9177 12685 UI - 4306 AU - Valencia L AU - Melendez E AU - Namorado MC AU - Martin D AU - Bidet M AU - Poujeol P AU - Reyes JL AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Physiol & Biophys, Mexico City 07000, DF, MexicoRes Ctr Adv Studies, Dept Physiol Biophys & Neurosci, Mexico City 07000, DF, MexicoUniv Nice, CNRS, UMR 6548, Nice 2, FranceNatl Polytech Inst, Natl Sch Biol Sci, Dept Pharm, Mexico City, DF, MexicoReyes, JL, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Physiol & Biophys, POB 14-740, Mexico City 07000, DF, Mexico TI - Parathyroid hormone increases cytosolic calcium in neonatal nephron through protein kinase C pathway AB - In mammals, neonatal positive calcium balance is required for adequate growth. Parathyroid hormone (PTH) plays a central role in this process mainly through its action on the distal nephron. We studied the effect of PTH on cytosolic calcium in distal segments from neonatal rat kidney. PTH elicited a concentration-dependent increase in cytosolic calcium in neonatal distal nephron (EC50=0.5 nM) but not in proximal tubules. At similar PTH concentrations the response was higher in the neonatal than in the adult tubules. The response was associated with protein kinase C (PKC), since phorbol myristate acetate (100 nM) increased [Ca2+]i, and staurosporin, an inhibitor of PKC, decreased (10 nM) or suppressed (100 nM) the PTH effect. cAMP analogues did not change [Ca2+]i. The response was diminished in low external calcium (0.1 mM) and absent at zero calcium, indicating dependency on external calcium. Resting calcium decreased from 80 +/- 10.8 to 28.6 +/- 2.6 nM at zero [Ca2+]e. PTH and nifedipine increased cytosolic calcium in an additive fashion. We show for the first time that PTH increased cytosolic calcium in the distal nephron of neonatal kidney, in a concentration-dependent pattern and in association with PKC activation. Higher sensitivity of the neonatal tubule might facilitate absorption of this cation during the neonatal period, when growth requires a positive balance of calcium MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics;Urology & Nephrology U5 - J;Article AV - English IS - 0931-041X UR - ISI:000224250200004 L2 - cAMP;phorbol myristate acetate;parathyroid hormone;staurosporin;cycloheximide;nifedipine;newborn;PROXIMAL TUBULES; KIDNEY; REABSORPTION; TRANSPORT; CELLS; MECHANISM; PHOSPHATE SO - Pediatric Nephrology 2004 ;19(10):1093-1101 12686 UI - 3808 AU - Valencic LA AU - Clayton GC AU - Gordon KD AD - Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAUniv Arizona, Steward Observ, Tucson, AZ 85721, USAValencic, LA, UNAM, Inst Astron, Apartado Postal 877, Ensenada 22800, Baja California, Mexico TI - Ultraviolet extinction properties in the Milky Way AB - We have assembled a homogeneous database of 417 ultraviolet (UV) extinction curves for reddened sight lines having International Ultraviolet Explorer spectra. We have combined these with optical and Two Micron All Sky Survey photometry, allowing estimates of the ratio of total-to-selective extinction, RV, for the entire sample. Fitzpatrick-Massa (FM) parameters have also been found for the entire sample. This is the largest study of parameterized UV extinction curves yet published, and it covers a wide range of environments, from dense molecular clouds to the diffuse interstellar medium, with extinctions A(V) ranging from 0.50 to 4.80. It is the first to extend far beyond the solar neighborhood and into the Galaxy at large, with 30 sight lines having distances greater than 5 kpc. Previously, the longest sight lines with FM parameters and R-V extended similar to1 kpc. We find that (1) the Cardelli, Clayton, & Mathis (CCM) extinction law applies for 93% of the sight lines, implying that dust processing in the Galaxy is efficient and systematic, (2) the central wavelength of the 2175 8 bump is constant, and (3) the 2175 8 bump width is dependent on environment. Only four sight lines show systematic deviations from CCM:HD 29647, 62542, 204827, and 210121. These sight lines all sample dense, molecule-rich clouds. The new extinction curves and values of RV allow us to revise the CCM law MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 21 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000225418100020 L2 - dust, extinction;ultraviolet : general;LARGE-MAGELLANIC-CLOUD; INTER-STELLAR EXTINCTION; POLYCYCLIC AROMATIC-HYDROCARBONS; SKY-SURVEY TELESCOPE; INTERSTELLAR EXTINCTION; TD-1 SATELLITE; SIGHT LINES; MOLECULAR CLOUD; GALACTIC PLANE; UBV PHOTOMETRY SO - Astrophysical Journal 2004 ;616(2):912-924 12687 UI - 4023 AU - Valero A AU - Correas L AU - Zaleta A AU - Lazzaretto A AU - Verda V AU - Reini M AU - Rangel V AD - Univ Zaragoza, Dept Mech Engn, CIRCE, Zaragoza 50018, SpainUniv Guanajuato, Dept Mech Engn, Guanajuato 36700, MexicoUniv Padua, Dept Mech Engn, I-35122 Padua, ItalyPolitecn Turin, Dept Energy Engn, I-10129 Turin, ItalyUniv Trieste, Dept Energy Engn, I-34127 Trieste, ItalyValero, A, Univ Zaragoza, Dept Mech Engn, CIRCE, Zaragoza 50018, Spain TI - On the thermoeconomic approach to the diagnosis of energy system malfunctions - Part 1: the TADEUS problem AB - This work is the first part of a wider project aiming at demonstrating the capabilities offered by the thermoeconomic approach to the diagnosis of malfunctions in energy utility systems (TADEUS problem). The final goal is to create a common basis of work for people interested in applying thermoeconomics to identify malfunctions and to evaluate their effects on the overall plant performance. The main issues to be addressed when performing a diagnosis of energy system malfunctions using a thermoeconomic approach are summarized. A combined cycle power plant is proposed to demonstrate the practical feasibility of the thermoeconomic approach. An overview of its operation characteristics, thermodynamic design properties and control strategy is given in Part 1, and a comprehensive model is described for further use as common basis to illustrate the various diagnosis approaches either by the authors or third parties. Possible component malfunctions and main theoretical aspects of the thermoeconomic approach are presented in Part 2. The paper shows at which level of detail the analysis of physical and technical characteristics of the plant should be performed, how to develop a design and off-design model suitable for malfunction analysis, how to analyse and define component malfunctions and how to interpret and use thermoeconomic variables and indexes. (C) 2004 Published by Elsevier Ltd MH - Italy MH - Mexico|Guanajuato MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Thermodynamics;Energy & Fuels U5 - J;Article AV - English IS - 0360-5442 UR - ISI:000224762400005 SO - Energy 2004 ;29(12-15):1875-1887 12688 UI - 4024 AU - Valero A AU - Correas L AU - Zaleta A AU - Lazzaretto A AU - Verda V AU - Reini M AU - Rangel V AD - Univ Zaragoza, Dept Mech Engn, CIRCE, Zaragoza 50018, SpainUniv Guanajuato, Dept Mech Engn, Guanajuato 36700, MexicoUniv Padua, Dept Mech Engn, I-35122 Padua, ItalyPolitecn Turin, Dept Energy Engn, I-10129 Turin, ItalyUniv Trieste, Dept Energy Engn, I-34127 Trieste, ItalyValero, A, Univ Zaragoza, Dept Mech Engn, CIRCE, Zaragoza 50018, Spain TI - On the thermoeconomic approach to the diagnosis of energy system malfunctions - Part 2. Malfunction definitions and assessment AB - This paper goes further with the aim at demonstrating the capabilities of the thermoeconomic approach to the diagnosis of energy utility systems. This paper deals with a common vocabulary, definitions of concepts and mathematical principles, and above all, focuses on the concept of malfunction, starting from an engineering point of view and then shifting to a pure formalization as thermoeconomic parameters. Possible malfunctions of components of a combined cycle power plant are described in this part in terms of causes and effects. In addition, the main theoretical aspects of the thermoeconomic approach are shown. In particular the fuel impact formula, which constitutes the main thermoeconomic tool for quantifying the effects of degradation, is discussed. (C) 2004 Published by Elsevier Ltd MH - Italy MH - Mexico|Guanajuato MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Thermodynamics;Energy & Fuels U5 - J;Article AV - English IS - 0360-5442 UR - ISI:000224762400006 SO - Energy 2004 ;29(12-15):1889-1907 12689 UI - 4075 AU - Valle-Levinson A AU - Castro AT AU - de Velasco GG AU - Armas RG AD - Old Dominion Univ, Dept Earth & Atmospher Sci, Ctr Coastal Phys Oceanog, Norfolk, VA 23529, USACtr Invest Cientif & Educ Super Ensenada Baja Cal, La Paz 23050, Baja California, MexicoCtr Interdisciplinario Ciencias Marinas, La Paz 23000, Baja California, MexicoValle-Levinson, A, Old Dominion Univ, Dept Earth & Atmospher Sci, Ctr Coastal Phys Oceanog, Norfolk, VA 23529 USA TI - Diurnal vertical motions over a seamount of the southern Gulf of California AB - A 6-month time series of velocity and scattered sound intensity profiles is used to document diurnal vertical motions over a seamount. El Bajo Espiritu Santo, in the southern Gulf of California, Mexico. The vertical motions persisted throughout the period cf measurements and is a noteworthy finding in this study. Data were collected with a 153.6-kHz acoustic Doppler current profiler (ADCP) deployed in water similar to 300 m deep between June 19 and December 8, 1999. Vertical velocities and scattered sound intensity anomalies recorded by the ADCP showed a well-defined diurnal periodicity throughout the period of observation. Peaks of both variables coincided with the timing of sunrises and sunsets and featured phase shifts consistent with upward or downward motions. It was likely that the diurnal peaks in vertical velocities and scattered sound intensity anomalies were associated with motions of the deep scattering layer that depicted vertical migrations of euphausiids and other zooplanktonic groups. This was suggested by plankton samples collected over the seamount early in the deployment and also given the frequency of the emitted sound and the documented dominant taxa of El Bajo Espiritu Santo. Typical upward velocities, at sunset, were 3 cm/s while downward velocities, at sunrise, were 4 cm/s over vertical spans of 100 - 150 m. The persistence of diurnal vertical motions throughout the 6 months of measurements was attributed to injections of zooplankton swarms from other parts of the Gulf of California by means of near-surface advective fluxes. Once in the area of the seamount, continued vertical migrations effected by the zooplankton groups probably reduced their chances of being swept away from this area as subtidal flows at depth were considerably weaker ( < 5 cm/s) than those near the surface (> 10 cm/s) and frequently in opposite direction. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Baja California MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0924-7963 UR - ISI:000224629800005 L2 - vertical motion;seamount;zooplankton;DOPPLER CURRENT PROFILERS; SARDINE SARDINOPS-SAGAX; BAJA-CALIFORNIA; DIEL MIGRATION; ZOOPLANKTON; PATTERNS; TIME; FISH; SEA; VARIABILITY SO - Journal of Marine Systems 2004 ;50(1-2):61-77 12690 UI - 4067 AU - Vallejo JA AD - Univ Valencia, Dept Geometria & Topol, E-46100 Burjassot, SpainUniv Autonoma San Luis Potosi Lat, Fac Ciencias, Mexico City 78290, DF, MexicoVallejo, JA, Univ Valencia, Dept Geometria & Topol, Av VA Estelles 1, E-46100 Burjassot, Spain TI - Generating operators of the Krasil'shchik-Schouten bracket AB - It is proved that given a divergence operator on the structural sheaf of graded commutative algebras of a supermanifold, it is possible to construct a generating operator for the Krashil'shchik-Schouten bracket. This is a particular case of the construction of generating operators for a special class of bigraded Gerstenhaber algebras. Also, some comments on the generalization of these results to the context of n-graded Jacobi algebras are included MH - Mexico|Distrito Federal MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0377-9017 UR - ISI:000224702800001 L2 - generating operators;Gerstenhaber algebras;Krasil'shchik-Schouten bracket;multiderivations;supermanifolds;ALGEBRAS; QUANTIZATION SO - Letters in Mathematical Physics 2004 ;68(1):1-17 12691 UI - 6255 AU - van Lis R AU - Atteia A AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoBrown Univ, Div Biol & Med, Providence, RI 02912, USAvan Lis, R, Univ Dusseldorf, Inst Plant Biochem, Univ Str 1, D-40225 Dusseldorf, Germany TI - Control of mitochondrial function via photosynthetic redox signals AB - In photosynthetic cells, mitochondrial respiration is of major importance not only in the dark but also in the light. Important progress has been made in our understanding of the roles played by mitochondria in light. The light signal is likely to reach cellular compartments such as the mitochondrion and the nucleus via different chloroplast-originated redox messages. The potential involvement of these messages in the regulation of mitochondrial biogenesis and activity by light is discussed in view of the available experimental data MH - Germany MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 12 U4 - Plant Sciences U5 - J;Review AV - English IS - 0166-8595 UR - ISI:000188854700002 L2 - chloroplast;electron transport;light regulation;mitochondrion;photosynthesis;redox regulation;redox state;GLYCINE DECARBOXYLASE COMPLEX; PEA LEAF MITOCHONDRIA; ALGA CHLAMYDOMONAS-REINHARDTII; PYRUVATE-DEHYDROGENASE COMPLEX; RESISTANT ALTERNATIVE OXIDASE; ENHANCED DARK RESPIRATION; HIGHER-PLANT MITOCHONDRIA; GENE-EXPRESSION; CYANIDE-RESISTANT; ELECTRON-TRANSPORT SO - Photosynthesis Research 2004 ;79(2):133-148 12692 UI - 5521 AU - varado-Diaz J AU - Campbell JA AD - Univ Texas, Dept Biol, Arlington, TX 76019, USAUniv Michoacana, Inst Recursos Nat, Lab Herpetol, Morelia, Michoacan, MexicoCampbell, JA, Univ Texas, Dept Biol, Arlington, TX 76019, USA TI - A new Montane rattlesnake (viperidae) from Michoacan, Mexico AB - A new species of rattlesnake is described from the upper elevations of Cerro Tancitaro in Michoacan, in the western portion of the Transverse Volcanic Cordillera. This diminutive rattlesnake appears to be most closely related to several species also occurring at high elevations in Mexico and the southwestern United States including Crotalus intermedius, C. pricei, and C. transversus. The Tancitaro species is most similar to C. transversus, but differs in aspects of lepidosis and color pattern MH - Mexico|Michoacan MH - USA PB - EMPORIA: HERPETOLOGISTS LEAGUE RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0018-0831 UR - ISI:000221467500013 L2 - cerro tancitaro;Crotalus tancitarensis;Mexico;Michoacan;new species;reptilia;serpentes;squamata;viperidae SO - Herpetologica 2004 ;60(2):281-286 12693 UI - 4568 AU - varez-Aquino C AU - Williams-Linera G AU - Newton AC AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoBournemouth Univ, Sch Conservat Sci, Poole BH12 5BB, Dorset, EnglandAlvarez-Aquino, C, Inst Ecol AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Experimental native tree seedling establishment for the restoration of a Mexican cloud forest AB - The cloud forests of Mexico have been degraded and severely fragmented, and urgently require restoration. However, progress with restoration has been constrained by a lack of information concerning the seedling ecology of native tree species. An experiment was therefore conducted to assess the influence of different environmental factors on the seedling survival and growth of four native tree species (Fagus grandifolia var. mexicana, Carpinus caroliniana, Symplocos coccinea, and Quercus acutifolia). The seedlings were established on three sites, in two contrasting environments: inside forest fragments and on adjacent agricultural land. Highly significant differences were recorded in seedling survival and growth among sites, environments, species, and interactions between these factors. Highest survival was recorded for Quercus, which uniquely among the four species displayed the same survival percentage inside and outside the forest. Survival of the other species was higher inside the forest. In contrast, growth rates of all four species were higher outside the forest. The most important cause of mortality outside the forest was desiccation, although significant seedling predation was also observed on two sites. Results indicate that all four species can be established successfully both within forest fragments and in neighboring agricultural areas, emphasizing the scope for forest restoration. However, the interactions observed between species, sites, and environments highlight the importance of accurate species-site matching if optimum rates of growth and survival are to be obtained. Quercus spp. have great potential for establishment on agricultural sites MH - United Kingdom MH - Mexico|Veracruz PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 1 U4 - Ecology U5 - J;Article AV - English IS - 1061-2971 UR - ISI:000223534700012 L2 - cloud forest;fragmentation;native tree species;restoration;seedling establishment;seedling survival;tropical montane cloud forest;Veracruz;TROPICAL RAIN-FOREST; GRANDIFOLIA VAR. MEXICANA; FAGUS-GRANDIFOLIA; COSTA-RICA; GROWTH; DISTURBANCE; RESPONSES; DYNAMICS SO - Restoration Ecology 2004 ;12(3):412-418 12694 UI - 5754 AU - varez-Cabanillas MA AU - Xu F AU - Fainman Y AD - Inst Politecn Nacl, Digital Technol Res & Dev Ctr, Tijuana 22510, BC, MexicoUniv Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093, USAAlvarez-Cabanillas, MA, Inst Politecn Nacl, Digital Technol Res & Dev Ctr, Avenida Parque 1310, Tijuana 22510, BC, Mexico TI - Modeling microlenses by use of vectorial field rays and diffraction integrals AB - A nonparaxial vector-field method is used to describe the behavior of low-f-number microlenses by use of ray propagation, Fresnel coefficients and the solution of Maxwell equations to determine the field propagating through the lens boundaries, followed by use of the Rayleigh-Sommerfeld method to find the diffracted field behind the lenses. This approach enables the phase, the amplitude, and the polarization of the diffracted fields to be determined. Numerical simulations for a convex-plano lens illustrate the effects of the radii of curvature, the lens apertures, the index of refraction, and the wavelength on the variations of the focal length, the focal plane field distribution, and the cross polarization of the field in the focal plane.(C) 2004 Optical Society of America MH - Mexico|Baja California MH - USA PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0003-6935 UR - ISI:000220759700006 L2 - PARAXIAL APPROXIMATION; FRESNEL APPROXIMATION; NEAR-FIELD; APERTURE; SYSTEMS; WAVES; BEAM SO - Applied Optics 2004 ;43(11):2242-2250 12695 UI - 4977 AU - varez-Castaneda ST AU - Patton JL AD - Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USACtr Invest Biol Noroeste SC, Mar Bermejo 195,AP 128, La Paz 23090, Baja California, MexicoUniv Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USAPatton, JL, Univ Calif Berkeley, Museum Vertebrate Zool, 3101 Valley Life Sci Bldg, Berkeley, CA 94720 USA TI - Geographic genetic architecture of pocket gopher (Thomomys bottae) populations in Baja California, Mexico AB - Phylogenetic analyses of complete mitochondrial cytochrome b sequences support the monophyly of pocket gopher (Thomomys bottae) populations from the 1000 km length of the Baja California peninsula of Mexico, relative to other geographical segments of the species range in western North America. The Baja California peninsula is an area that encompasses considerable ecomorphological and infraspecific diversity within this pocket gopher species. However, detailed population analyses encompassing 35 localities distributed over the southern half of the peninsula reveal only trivial phylogeographical structure. Rather, most of the 72 unique 500-base pair haplotypes examined from 142 individuals is restricted to single populations, although a few haplotypes are shared broadly across geography. Individual populations are typically comprised of haplotype sets from different branches in a network of relationships. Analysis of molecular variance (AMOVA) indicates that approximately half of the total pool of variation is contained among individuals within local populations, and that only about 25% can be explained by the regional subdivisions of current subspecies distributions or physiographic realms. A hypothesized historical vicariant event that has been causally linked to the phylogeographical structure of other, codistributed species has had little influence on these pocket gopher populations, explaining only 13% of the total variation. The temporal depth, estimated by coalescence parameters, of the haplotype lineage in Baja California is relatively recent, approximately 300 000 generations; both the mismatch distribution of pairwise comparisons and a significantly positive exponential growth estimate support a recent history of expanding populations; but current, or recent past, migration estimates have remained small, are largely unidirectional from north to south, and weak isolation by distance is present. All data suggest that pocket gophers have relatively recently invaded the southern half of peninsular Baja California, with the genetic signature of expansion still evident but with sufficient time having lapsed to result in a weak isolation by distance pattern. The geographical assemblage of sampled populations thus appears as a meta-population, with limited gene flow contrasting with random haplotype loss due to drift in small, localized populations MH - USA MH - Mexico|Baja California PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000222521300016 L2 - AMOVA;coalescence;mtDNA;pocket gophers;population expansion;Thomomys;MAXIMUM-LIKELIHOOD-ESTIMATION; DNA-SEQUENCE DATA; MITOCHONDRIAL-DNA; GENUS THOMOMYS; RATES; COALESCENT; GEOMYIDAE; MIGRATION; GROWTH SO - Molecular Ecology 2004 ;13(8):2287-2301 12696 UI - 3904 AU - varez-Nava F AU - Soto M AU - Fernandez E AU - Zenteno JC AD - Univ Zulia, Fac Med, Unidad Genet Med, Maracaibo 4011, VenezuelaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Genet, Mexico City, DF, MexicoAlvarez-Nava, F, Univ Zulia, Fac Med, Unidad Genet Med, Maracaibo 4011, Venezuela TI - Nested polymerase chain reaction - not ready for gold standard status yet! MH - Mexico|Distrito Federal MH - Venezuela PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Letter AV - English IS - 0015-0282 UR - ISI:000225128300048 L2 - SEQUENCES; PCR SO - Fertility and Sterility 2004 ;82(5):1471-1471 12697 UI - 4188 AU - varez-Nemegyei J AU - Canoso JJ AD - Inst Mexicano Seguro Social, Ctr Med Nacl Ignacio Garcia Tellez, Hosp Especialidades, Serv Reumatol, Merida, Yucatan, MexicoABC Med Ctr, Mexico City, DF, MexicoTufts Univ, Dept Med, Sch Med, Boston, MA 02111, USAAlvarez-Nemegyei, J, Calle 57 503,Cent, Merida 97000, Yucatan, Mexico TI - Evidence-based soft tissue rheumatology. V - Plantar talalgia AB - Present evidence indicates that the main cause of plantar talalgia (PT) is a noninflammatory derangement at the proximal insertion of the plantar fascia. In athletes, predisposing ankle and rear-foot biomechanical abnormalities have been identified; in non-athletes, risk factors for the condition remain controversial. PT diagnosis is largely clinical, the key findings being pain and tenderness on the plantar aspect of the rear foot. Ultrasonography is a reliable confirmatory study in doubtful cases. Therapies in PT include nonsteroidal anti-inflammatory drugs, orthotic devices, night ankle dorsiflexion splints, physiotherapy, local glucocorticoid, and extracorporeal shockwave therapy. In recalcitrant cases, surgery may be offered. Of these therapies, only local glucocorticoid, as delivered by injection or iontophoresis, has shown short-term efficacy in controlled trials. The efficacy of ankle dorsiflexion splints and extracorporeal shockwave therapy is still controversial. Thus, important knowledge gaps remain on etiology, diagnosis, and treatment of PT MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Review AV - English IS - 1076-1608 UR - ISI:000224367400007 L2 - plantar talalgia;plantar fasciitis;inferior heel pain;SHOCK-WAVE THERAPY; RANDOMIZED CONTROLLED-TRIAL; HEEL PAIN; STEROID INJECTION; NIGHT SPLINT; DOUBLE-BLIND; RISK-FACTORS; FASCIITIS; ULTRASOUND; INJURIES SO - Jcr-Journal of Clinical Rheumatology 2004 ;10(5):259-262 12698 UI - 4696 AU - varez-Nemegyei J AU - Canoso JJ AD - Inst Mexicano Seguro Social, Ctr Med Nacl Ignacio Garcia Tellez, Hosp Especialidades, Serv Reumatol, Merida, Yucatan, MexicoTufts Univ, Sch Med, Dept Med, Boston, MA, USAAlvarez-Nemegyei, J, Calle 57 Num 503,Ctr CP 97000, Merida 97000, Yucatan, Mexico TI - Evidence-based soft tissue rheumatology IV - Anserine bursitis AB - Anserine bursitis is a frequent cause of medial knee pain. Despite its name, the structure at fault causing the symptoms remains unknown. Diabetes mellitus is a known predisposing factor leading to the condition. Overweight and knee osteoarthritis are possible additional risk factors, but their role has yet to be assessed. Anserine bursitis is diagnosed clinically based on medial knee pain and localized tenderness at the inferomedial knee. Current treatment of anserine bursitis includes nonsteroidal anti-inflammatory dugs, physiotherapy, and local glucocorticoid injections. Of these, only the latter has been shown effective in clinical trials. Knowledge gaps in the epidemiology, pathology, and pathogenesis of anserine bursitis should lead to additional research efforts on this common and perplexing condition MH - Mexico|Yucatan MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 2 U4 - Rheumatology U5 - J;Review AV - English IS - 1076-1608 UR - ISI:000223296600007 L2 - anserine bursitis;pes anserinus;knee pain;DIABETES-MELLITUS; TENDINO-BURSITIS; KNEE SO - Jcr-Journal of Clinical Rheumatology 2004 ;10(4):205-206 12699 UI - 5140 AU - varez-Nemegyei J AU - Canoso JJ AD - Hosp Especialidades Ctr Med La Raza, Serv Reumatol, Ctr Med Nacl Ignacio Garcia Tellez, Inst Mexicano Seguro Social, Merida, Yucatan, MexicoABC Med Ctr, Mexico City, DF, MexicoTufts Univ, Sch Med, Dept Med, Boston, MA 02111, USAAlvarez-Nemegyei, J, Calle 57 Num 503,Ctr, Merida 97000, Yucatan, Mexico TI - Evidence-based soft tissue rheumatology - III: Trochanteric bursitis AB - Trochanteric bursitis is a term used to name a syndrome that features pain and tenderness over the greater trochanter. Present evidence suggests that in the majority of cases, symptoms result from pathology of the gluteus medius or minimus muscles rather than a bursa. Lower limb length discrepancy, iliotibial band contracture, hip osteoarthritis and lumbar spondylosis are often mentioned, but no proved as predisposing factors. After a lumbar spine or hip and other local pathology have been considered and clinically excluded, the clinical features of the syndrome, ie lateral location of pain plus characteristic trochanteric tenderness are usually sufficient to reach a diagnosis. Most patients with trochanteric bursitis can be successfully treated with a NSAID, physiotherapy plus a local corticosteroid injection. The few refractory cases are often treated surgically. Disappointingly, none of the therapeutic interventions used in trochanteric bursitis have been validly assessed MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Review AV - English IS - 1076-1608 UR - ISI:000222280300006 L2 - bursitis;hip bursitis;trochanteric bursitis;greater trochanter pain syndrome;GLUTEUS MEDIUS; PAIN; TEARS; INJECTION; BURSA; HIP SO - Jcr-Journal of Clinical Rheumatology 2004 ;10(3):123-124 12700 UI - 6215 AU - varez-Nemegyei J AU - Canoso JJ AD - Hosp Especial, Ctr Med Nacl Ignacio Garcia Tellez, Inst Mexicano Seguro Social, Serv Reumatol, Merida, Yucatan, MexicoABC, Med Ctr, Mexico City, DF, MexicoTufts Univ, Sch Med, Boston, MA 02111, USAAlvarez-Nemegyei, J, Calle 57 Num 503 Ctr, Merida 97000, Yucatan, Mexico TI - Evidence-based soft tissue rheumatology - Epicondylitis and hand stenosing tendinopathy AB - Lateral and medial epicondylitis represent overuse tendinopathies of wrist extensor and wrist flexor muscles, respectively. In lateral epicondylitis, a short-term therapeutic efficacy of glucocorticoid injection and limited evidence on the efficacy of acupuncture has been shown. De Quervain tendinopathy is caused by tendinous impingement by a thickened retinaculum. There is limited evidence on the efficacy of glucocorticoid injection in this condition. Trigger finger usually results from tendon entrapment beneath a thickened At flexor pulley. An association with hand tool use and diabetes has been shown in this condition, and there is evidence on the therapeutic efficacy of glucocorticoid injection. No other therapeutic modality has shown efficacy or has been assessed in a placebo-controlled clinical trial in these conditions. It can be concluded that epicondylitis and stenosing tendinopathy are readily diagnosed, and most patients recover with current therapies. However, still unsolved issues preclude a purely evidence-based approach to these entities MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Review AV - English IS - 1076-1608 UR - ISI:000189036500009 L2 - epicondylitis;stenosing tenosynovitis;hand tenosynovitis;de Quervain tenosynovitis;DE-QUERVAINS-DISEASE; SHOCK-WAVE THERAPY; RANDOMIZED CONTROLLED-TRIAL; SOUTHAMPTON EXAMINATION SCHEDULE; CHRONIC TENNIS ELBOW; TERM FOLLOW-UP; LATERAL EPICONDYLITIS; TRIGGER FINGER; CORTICOSTEROID INJECTIONS; MUSCULOSKELETAL DISORDERS SO - Jcr-Journal of Clinical Rheumatology 2004 ;10(1):33-40 12701 UI - 5360 AU - varez-Ramirez F AU - Martinez-Magadan JM AU - Gomes JRB AU - Illas F AD - Inst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoUniv Barcelona, Dept Quim Fis, Barcelona 08028, SpainUniv Barcelona, Ctr Especial Recerca Quim Teor, Barcelona 08028, SpainUniv Porto, Fac Ciencias, Ctr Invest Quim, P-4169007 Oporto, PortugalAlvarez-Ramirez, F, Inst Mexicano Petr, Programa Ingn Mol, Eje Cent Lazaro Cardenas 152, Mexico City 07730, DF, Mexico TI - On the geometric structure of the (0001)hematite surface AB - A theoretical study of the surface structural relaxation of the (0 0 0 1) hematite is presented which explores the influence of the size of a slab model, the number of relaxed surface layers and various computational approaches, all of them based on density functional theory (DFT). Four different slab models including 9, 12, 15, and 18 layers were analyzed. In each model, sequences from 1 to 7 layers were relaxed while keeping the bottom layers fixed to mimic the constraints imposed by the bulk. In the geometry optimization procedure, four different DFT approximation levels were employed, namely, the non-selfconsistent Harris functional, the local spin-density approximation, LSDA, the PW91 or BP meta GGA functionals and the hybrid B3LYP method. It was found that the relaxation predicted for up to four layers is independent of the slab thickness. Except for the Harris functional, all methods and models predict consistent values for the relaxation of the innermost layers. It is concluded that the Harris functional can be used to explore the adequacy of a given model but not to provide an accurate enough structure of the relaxed hematite (0 0 0 1) surface. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Portugal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000221728000002 L2 - ab initio quantum chemical methods and calculations;density functional calculations;surface relaxation and reconstruction;surface structure, morphology, roughness;and topography;iron oxide;surface defects;DENSITY-FUNCTIONAL THEORY; ALPHA-FE2O3 THIN-FILMS; TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; HEMATITE ALPHA-FE2O3; MAGNETIC-PROPERTIES; BASIS-SET; RELAXATION; ALPHA-AL2O3; CHEMISTRY SO - Surface Science 2004 ;558(1-3):4-14 12702 UI - 6246 AU - varez-Rubio S AU - Sanchez-Sesma FJ AU - Benito JJ AU - Alarcon E AD - Univ Politecn Madrid, EUIT Ind, Dept Matemat Aplicada, Madrid 28012, SpainUniv Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Nacl Distancia, ETSI Ind, Dept Ing Construcc & Fabricac, Madrid 28080, SpainUniv Politecn Madrid, ETSI Ind, Dept Mecan Estructural & Construcc Ind, E-28006 Madrid, SpainAlvarez-Rubio, S, Univ Politecn Madrid, EUIT Ind, Dept Matemat Aplicada, Ronda Valencia 3, Madrid 28012, Spain TI - The direct boundary element method: 2D site effects assessment on laterally varying layered media (methodology) AB - The Direct Boundary Element Method (DBEM) is presented to solve the elastodynamic field equations in 2D, and a complete comprehensive implementation is given. The DBEM is a useful approach to obtain reliable numerical estimates of site effects on seismic ground motion due to irregular geological configurations, both of layering and topography. The method is based on the discretization of the classical Somigliana's elastodynamic representation equation which stems from the reciprocity theorem. This equation is given in terms of the Green's function which is the full-space harmonic steady-state fundamental solution. The formulation permits the treatment of viscoelastic media, therefore site models with intrinsic attenuation can be examined. By means of this approach, the calculation of 2D scattering of seismic waves, due to the incidence of P and SV waves on irregular topographical profiles is performed. Sites such as, canyons, mountains and valleys in irregular multilayered media are computed to test the technique. The obtained transfer functions show excellent agreement with already published results. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Geological;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0267-7261 UR - ISI:000188889500006 L2 - 2D site effects;irregular multilayered medium;direct boundary element method;RAYLEIGH-WAVES; ELASTODYNAMIC PROBLEMS; GREENS-FUNCTIONS; EURO-SEISTEST; INCIDENT P; S-WAVES; EUROSEISTEST; DIFFRACTION; TOPOGRAPHIES; SCATTERING SO - Soil Dynamics and Earthquake Engineering 2004 ;24(2):167-180 12703 UI - 5906 AU - Varga Z AU - Valdez-Cruz NA AU - Bagdany M AU - Somodi S AU - Gaspar R AU - Possani LD AU - Panyi G AD - Debrecen Univ, Dept Biophys & Cell Biol, Debrecen, HungaryUNAM, Dept Mol Med, Inst Biotechnol, Cuernavaca, Morelos, Mexico TI - Anurotoxin: a potent and selective blocker of Kv1.3 channels MH - Hungary MH - Mexico|Morelos PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000187971202776 SO - Biophysical Journal 2004 ;86(1):538A-538A 12704 UI - 4490 AU - Vargas-Luna I AU - Ortiz-Montiel G AU - Chavez VM AU - Litz RE AU - Moon PA AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, ENEP Iztacala, Mexico City 04510, DF, MexicoUniv Florida, Ctr Trop Res & Educ, Homestead, FL 33031, USAVargas-Luna, I, Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, Mexico TI - Biochemical characterization of developmental stages of cycad somatic embryos AB - The effect of two light intensities (25 mumol m(-2)s(-1) and 50 mumol m(-2)s(-1)) on four developmental stages of Ceratozamia mexicana somatic embryos growing on semisolid plant growth medium at 25degreesC was measured. Growth parameters included fresh weight, morphology, and invertase and peroxidase activity. Under low light conditions, fresh weight was greater in stages 1 and 2 than in stages 3 and 4. In addition, there was a high frequency of hyperhydricity and polyembryogenesis in stages 1 and 2, whereas stages 3 and 4 were nonhyperhydric and unbranched. Stages 2-4 were green. Under high light conditions, embryos had lower fresh weights and less hyperhydricity, and stages 2-4 were green. Under low light conditions, peroxidase activity was less, although stage 1 embryos under both light conditions showed the highest activity. Stage 1 embryos required three to four months to develop to stage 2 under high light conditions and two to three months under low light conditions. Invertase activity under low light conditions was minimal in stage 2. All embryos had low invertase activity under high light intensity, and stages 2-4 had high levels of glucose. Embryo development from stage 2 to the next and for each subsequent stage under high light conditions required three to four months, and under low light conditions required four to five months. Higher light intensity therefore promotes the speedy recovery of plants MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0006-8101 UR - ISI:000223771500007 L2 - PEROXIDASE-ACTIVITY; IN-VITRO; INVITRO; GROWTH; CULTURES; MEXICANA; ANATOMY; CALLUS SO - Botanical Review 2004 ;70(1):54-62 12705 UI - 4751 AU - Vargas-Perez H AU - Borrelli E AU - Diaz JL AD - Natl Autonomous Univ Mexico, Inst Neurobiol, Fac Med, Dept Neurobiol Conductual & Cognit, Queretaro 76001, Qro, MexicoCNRS, INSERM, ULP, Inst Genet & Biol Mol & Cellulaire, F-67404 Illkirch Graffenstaden, FranceVargas-Perez, H, Natl Autonomous Univ Mexico, Inst Neurobiol, Fac Med, Dept Neurobiol Conductual & Cognit, Apartado Postal 1-1141, Queretaro 76001, Qro, Mexico TI - Wheel running use in dopamine D2L receptor knockout mice AB - The present study investigated the role of dopamine and the opioid system in the acquisition and maintenance of wheel running use (WR), employing D2L receptor-deficient (D2L-/-) mice as a model system. The daily administration of 1 mg/kg of naloxone virtually abolished the acquisition of WR in D2L-/-, but did not modify the number of wheel turns after the consolidation of this behavior. These findings imply that both dopamine and opioid reward systems are necessary for WR consolidation, and they also suggest that reward systems in WR could vary according to the motivational stage of the animal. (C) 2004 Elsevier Ireland Ltd. All rights reserved MH - France MH - Mexico|Queretaro PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 3 U4 - Neurosciences U5 - J;Article AV - English IS - 0304-3940 UR - ISI:000223117700013 L2 - D2L knockout mice;wheel running;dopamine;VENTRAL TEGMENTAL AREA; LOCOMOTOR-ACTIVITY; NUCLEUS-ACCUMBENS; OPIATE REWARD; DEPRIVED RATS; FOOD; REINFORCEMENT; DEPRIVATION; ADDICTION; BEHAVIOR SO - Neuroscience Letters 2004 ;366(2):172-175 12706 UI - 4820 AU - Vargas-Torres A AU - Osorio-Diaz P AU - Islas-Hernandez JJ AU - Tovar J AU - Paredes-Lopez O AU - Bello-Perez LA AD - IPN, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041A, VenezuelaIPN, Unidad Irapuato, Ctr Invest & Estudios Avanzados, Guanajuato 36500, MexicoBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, Km 8-5 carr Yautepec Jojutla,Colonia San Isidro,A, Yautepec 62731, Morelos, Mexico TI - Starch digestibility of five cooked black bean (Phaseolus vulgaris L.) varieties AB - Five common bean varieties were cooked and studied regarding starch digestibility. Cooking time of different cultivars ranged between 2.55 and 5.92 h. Available starch (AS) values decreased with the storage time and the bean sample that had the lowest AS content (control sample, without storage) showed the shortest cooking time. A similar pattern was found for resistant starch (RS); the varieties that had the longest cooking time presented the widest range in RS values, measured as the difference between the control sample and the value obtained in the sample stored during 96h. The retrograded RS (RRS) depended on the variety and even more on the molecular structure of each starch. The in vitro a-amylolysis rate decreased with the storage time; the samples with the smallest hydrolysis percentage had the highest RS content. These results suggest that some bean varieties could be recommended depending on the specific dietetic use of beans. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Guanajuato MH - Mexico|Morelos MH - Venezuela PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0889-1575 UR - ISI:000222999700005 L2 - starch;resistant starch;beans;starch hydrolysis;legumes;WX-CONTAINING GENOTYPES; RESISTANT STARCH; GLYCEMIC INDEX; MAIZE STARCHES; FINE-STRUCTURE; STEAM-COOKING; BLOOD-GLUCOSE; INDIAN PULSES; LEGUME; DIGESTION SO - Journal of Food Composition and Analysis 2004 ;17(5):605-612 12707 UI - 6077 AU - Vargas-Torres A AU - Osorio-Diaz P AU - Tovar J AU - Paredes-Lopez O AU - Ruales J AU - Bello-Perez LA AD - IPN, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoCent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas, VenezuelaIPN, Ctr Invest & Estudios Avanzados, Guanajuato, MexicoEscuela Politec Nacl, Dept Ciencia Alimentos & Biotecnol, Quito, EcuadorBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, Km 8-5 Carr Yanutepec Jojutla,Colonia San Isidro,, Yautepec 62731, Morelos, Mexico TI - Chemical composition, starch bioavailability and indigestible fraction of common beans (Phaseolus vulgaris L.) AB - In Mexico, consumption of beans represents 15% of the normal diet of the population in rural zones. Four common bean varieties cultivated in Mexico were studied regarding their chemical composition, starch digestibility and indigestible fraction. The protein level in the samples Huasteco, Tacana and TLP 19 was not different (alpha = 0.05), but Veracruz cultivar had the highest protein and ash content, and the lowest lipid level. Differences in chemical composition were determined in the cultivars studied. Total starch (TS) ranged between 33.6 and 36.7%, and the cultivars Tacana, TLP 19 and Veracruz were not different in starch content (a = 0.05). The available starch (AS) determined represented between 74 and 87% of TS, due to the resistant starch content and perhaps some complex formed between starch and protein or starch and polyphenols, by the high level of the indigestible fraction determined in the beans. The in vitro alpha-amylolysis rate was similar for the different varieties, except for Veracruz cultivar which presented a slightly lower hydrolysis rate MH - Ecuador MH - Mexico|Guanajuato MH - Mexico|Morelos MH - Venezuela PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 7 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0038-9056 UR - ISI:000189309400005 L2 - resistant starch;beans;starch hydrolysis;legumes;indigestible fraction;RESISTANT STARCH; GLYCEMIC-INDEX; SMALL-INTESTINE; STEAM-COOKING; BLOOD-GLUCOSE; INDIAN PULSES; DIGESTIBILITY; DIGESTION; LEGUMES; AVAILABILITY SO - Starch-Starke 2004 ;56(2):74-78 12708 UI - 3219 AU - Vargas AO AU - Toledo AC AU - Luna RR AU - Cardos RC AU - Ramirez AR AU - Perez RG AU - Asiain GE AD - Inst Nacl Pediat, Mexico City, DF, MexicoHosp SSA, Aguascalientes, MexicoCtr Estatal Cancerol, Merida, Venezuela TI - Gemcitabine based chemotherapy in recurrent or advanced pediatric solid tumors: A phase II study MH - Mexico|Aguascalientes MH - Mexico|Distrito Federal MH - Venezuela PB - ALEXANDRIA: AMER SOC CLINICAL ONCOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 0732-183X UR - ISI:000223512403242 SO - Journal of Clinical Oncology 2004 ;22(14):817S-817S 12709 UI - 5709 AU - Vargas C AU - Hegde MV AU - Naraghi-Pour M AD - ITESM Monterrey, Ctr Elect & Telecommun, Monterrey 64849, NL, MexicoWashington Univ, Dept Elect Engn, St Louis, MO 63130, USALouisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USAVargas, C, ITESM Monterrey, Ctr Elect & Telecommun, Av Eugenio Garza Sada 2501 Sur, Monterrey 64849, NL, Mexico TI - Implied costs for multirate wireless networks AB - Implied costs for multirate wireless networks are calculated and their use is demonstrated for quantifying mobility, traffic load, call pricing, network optimization and for evaluating trade-offs between calls of different rates. User mobility is modeled by assigning call termination and call handoff probabilities. Fixed Channel Assignment (FCA) is used with priority for handoffs over new call arrivals by reserving a number of channels in all the cells. The performance measures used are new call blocking and handoff drop probabilities. The implied cost is calculated for the network net revenue, which considers the revenue generated by accepting a new call arrival into the network as well as the cost of a handoff drop in any cell. Simulation and numerical results are presented to show the accuracy of the model. The implied costs are used to suggest pricing techniques for different calls based on mobilities and bandwidth. Finally, a nonlinear constrained optimization problem is formulated to calculate the sum revenue for a given network by maximizing the net revenue using implied costs in a gradient descent algorithm. The implied cost analysis also shows that matching capacity distribution to not only exogenous traffic, but also to mobility can significantly increase revenue MH - Mexico|Nuevo Leon MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Information Systems;Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 1022-0038 UR - ISI:000220841700010 L2 - wireless networks;mobility;optimal network design;multirate networks;SHADOW PRICES; TRUNK RESERVATION; OPTIMIZATION; BLOCKING SO - Wireless Networks 2004 ;10(3):323-337 12710 UI - 6067 AU - Vargas G AU - Vazquez F AU - Lopez J AU - Mendez J AU - Mendez M AU - Pena P AD - CINVESTAV, Unidad Saltillo, Saltillo, Coahuila, MexicoCSIC, Inst Ceram & Vidrio, Madrid, SpainVargas, G, CINVESTAV, Unidad Saltillo, Saltillo, Coahuila, Mexico TI - Foaming of sodium silicate-wollastonite mixtures by microwaves AB - The effect of the application of microwaves on the volume, porosity and thermal conductivity of sodium silicate-wollastonite mixtures was studied. The compositional range studied was 20-100 wt% sodium silicate. A weight loss of 19% and a volume increase of 50% were obtained for mixtures with 20 wt% sodium silicate. The weight loss increased up to 27% with increasing sodium silicate content. Volume increased in 500% for samples with 100 wt% sodium silicate. Ceramic foams with total porosities of 65 vol % were obtained for specimens containing 20 wt% sodium silicate (with apparent and real densities of 1.0 and 2.75 g/cc, respectively), while samples containing 100 wt% sodium silicate presented total porosities of 91 vol% (with apparent and real densities of 0.182 and 2.0 g/cc, respectively). The best pore size uniformity (10-30 mum) was obtained for a sodium silicate content of 80 wt%. The thermal conductivities of the ceramic foams were 0.2, 0,125 and 0,065 W/m(.)K for sodium silicate contents of 40, 70 and 100 wt%, respectively MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000220041900019 L2 - ceramic foams;microwaves;silicates SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(1):71-74 12711 UI - 3535 AU - Varma-Basil M AU - El-Hajj H AU - Colangeli R AU - Hazbon MH AU - Kumar S AU - Bose M AU - Bobadilla-del-Valle M AU - Garcia LG AU - Hernandez A AU - Kramer FR AU - Osornio JS AU - Ponce-de-Leon A AU - Alland D AD - Univ Med & Dent New Jersey, New Jersey Med Sch, Div Infect Dis, Dept Med, Newark, NJ 07103, USAPubl Hlth Res Inst, Dept Mol Genet, Newark, NJ, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Delhi, Dept Microbiol, Vallabhbhai Patel Chest Inst, Delhi 110007, IndiaAlland, D, Univ Med & Dent New Jersey, New Jersey Med Sch, Div Infect Dis, Dept Med, 185 S Orange Ave, Newark, NJ 07103 USA TI - Rapid detection of rifampin resistance in Mycobacterium tuberculosis isolates from India and Mexico by a molecular beacon assay AB - We assessed the performance of a rapid, single-well, real-time PCR assay for the detection of rifampin-resistant Mycobacterium tuberculosis by using clinical isolates from north India and Mexico, regions with a high incidence of tuberculosis. The assay uses five differently colored molecular beacons to determine if a short region of the H. tuberculosis rpoB gene contains mutations that predict rifampin resistance in most isolates. Until now, the assay had not been sufficiently tested on samples from countries with a high incidence of tuberculosis. In the present study, the assay detected mutations in 16 out of 16 rifampin-resistant isolates from north India (100%) and in 55 of 64 rifampin-resistant isolates from Mexico (86%) compared to results with standard susceptibility testing. The assay did not detect mutations (a finding predictive of rifampin susceptibility) in 37 out of 37 rifampin-susceptible isolates from India (100%) and 125 out of 126 rifampin-susceptible isolates from Mexico (99%). DNA sequencing revealed that none of the nine rifampin-resistant isolates from Mexico, which were misidentified as rifampin susceptible by the molecular beacon assay, contained a mutation in the region targeted by the molecular beacons. The one rifampin-susceptible isolate from Mexico that appeared to be rifampin resistant by the molecular beacon assay contained an S531W mutation, which is usually associated with rifampin resistance. Of the rifampin-resistant isolates that were correctly identified in the molecular beacon assay, one contained a novel L530A mutation and another contained a novel deletion between codons 511 and 514. Overall, the molecular beacon assay appears to have sufficient sensitivity (89%) and specificity (99%) for use in countries with a high prevalence of tuberculosis MH - India MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000226035800013 L2 - REAL-TIME PCR; ISONIAZID RESISTANCE; DRUG-RESISTANCE; SINGLE TUBE; MUTATIONS; OUTCOMES; GENE SO - Journal of Clinical Microbiology 2004 ;42(12):5512-5516 12712 UI - 5361 AU - Varon J AU - DeGorordo A AD - Univ Texas, St Lukes Episcopal Hosp, Hlth Sci Ctr, Houston, TX 77030, USAUniv Autonoma Tamaulipas, Tampico, Tamaulipas, MexicoVaron, J, Univ Texas, St Lukes Episcopal Hosp, Hlth Sci Ctr, 2219 Dorrington, Houston, TX 77030 USA TI - Diving emergencies: A sea of controversy MH - Mexico|Tamaulipas MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Critical Care Medicine;Emergency Medicine U5 - J;Letter AV - English IS - 0300-9572 UR - ISI:000221681400017 SO - Resuscitation 2004 ;61(2):239-239 12713 UI - 5362 AU - Varon J AU - DeGorordo A AD - Univ Texas, St Lukes Episcopal Hosp, Hlth Sci Ctr, Houston, TX, USAUniv Autonoma Tamaulipas, Tampico, Tamaulipas, MexicoVaron, J, 2219 Dorrington, Houston, TX 77030, USA TI - Diving emergencies - Reply MH - Mexico|Tamaulipas MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Critical Care Medicine;Emergency Medicine U5 - J;Letter AV - English IS - 0300-9572 UR - ISI:000221681400020 SO - Resuscitation 2004 ;61(2):240-240 12714 UI - 4502 AU - Vasquez-Bolanos M AU - Mackay WP AD - Univ Guadalajara, Ctr Estudios Zool, Zapopan 45100, Jalisco, MexicoUniv Texas, Dept Biol Sci, El Paso, TX 79968, USAVasquez-Bolanos, M, Univ Guadalajara, Ctr Estudios Zool, Apdo Postal 234, Zapopan 45100, Jalisco, Mexico TI - A new species of harvester ant of the genus Pogonomyrmex (Hymenoptera : Formicidae) from Mexico AB - We describe a new species of harvester ant, Pogonomyrmex humerotumidus from the state of Michoacan, Mexico. The worker of this species is easily recognized, as the psammophore is poorly developed, the mandibles have only 5 teeth, the pronotal shoulders are swollen into protuberances, and the propodeum lacks teeth. The worker is ferrugineous red. The female and male are unknown. It also differs from similar North American species such as P. huachucanus Wheeler, 1914, P. imberbiculus Wheeler, 1902 and P. pima Wheeler, 1909 in lacking propodeal spines. It can be distinguished from P. laevinodis Snelling, 1982, which also lacks spines on the propodeum, as the side of the petiolar node is sculptured, not smooth as in the latter species. It is similar to P. guatemaltecus Wheeler, 1914, which also lacks propodeal spines, but differs in being larger (total length similar to 8 mm, vs. similar to 6 mm in P. guatemaltecus). The pronotal angles of P. guatemaltecus are slightly swollen, but do not form protuberances as they do in P. humerotumidus. In morphology this species is closely related to the Argentinean P. inermis Forel, 1914, which can be distinguished as it has 6 mandibular teeth, and lacks the angulate subpeduncular process MH - Mexico|Jalisco MH - USA PB - CHICO: CALIF STATE UNIV RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - Spanish IS - 0361-6525 UR - ISI:000223537800006 L2 - harvester ant;Pogonomyrmex humerotumidus;Formicidae;Mexico SO - Sociobiology 2004 ;44(2):283-287 12715 UI - 4381 AU - Vasquez-Yeomans R AU - Caceres-Martinez J AU - Huerta AF AD - Ctr Invest Cient & Educ Super Ensenada, Dept Acuicultura, Lab Biol & Patol Organismos Acuat, Ensenada 22860, Baja California, MexicoInst Invest Marinas Vigo, Lab Nacl Referencia Enfermedades Moluscos, Vigo 36208, SpainCaceres-Martinez, J, Inst Sanidad Acuicola, AC Calle 9NA & Gastelum 468 Local 14,Zona Cent, Ensenada 22800, Baja California, Mexico TI - Herpes-like virus associated with eroded gills of the Pacific oyster Crassostrea gigas in Mexico AB - Since 1997, high mortality episodes of cultured oysters have occurred in Bahia Falsa, Mexico. Studies on the possible association of these mortalities with pathogens have showed some similar characteristics to those found in the Portuguese oyster Crassostrea angulata and the Japanese oyster Crassostrea gigas infected by an iridoviridae-like particles in the lately 1960s. This infection was named gill necroses virus infection (GNV). In a recent study, we could not find any virus using transmission electron microscopy (TEM) in adult oysters with clinical and histologic signs similar to those described for GNV. However, new TEM images showed the presence of viral particles in eroded gills of oysters. Morphologic characteristics, such as thin-walled icosahedric shape, the presence of capsids in an extension of the nucleus or in a vacuole and size varying from 80 to 90 out suggest that the viruses belong to the Herpes viridae family. This virus could be involved in the mortality episodes in the Bay and it is different to those described as causal agent of GNV MH - Mexico|Baja California MH - Spain PB - SOUTHAMPTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 4 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000223925100010 L2 - Crassostrea gigas;herpes-like virus;mortality;gill erosion;oyster disease;MARINE BIVALVES; INFECTIONS; PCR; DNA SO - Journal of Shellfish Research 2004 ;23(2):417-419 12716 UI - 3875 AU - Vayssie L AU - Vargas M AU - Weber C AU - Guillen N AD - Inst Pasteur, INSERM, U389, Unite Biol Cellulaire Parasitisme, F-75724 Paris 15, FranceIPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City 07738, DF, MexicoGuillen, N, Inst Pasteur, INSERM, U389, Unite Biol Cellulaire Parasitisme, 28 Rue Dr Roux, F-75724 Paris 15, France TI - Double-stranded RNA mediates homology-dependant gene silencing of gamma-tubulin in the human parasite Entamoeba histolytica AB - Approaches that eliminate mRNA are a powerful tool for reverse genetics applications in eukaryotic microbes for which gene replacement techniques have not yet been developed. Here, for the first time, we demonstrate that RNA duplexes efficiently inhibit gene expression when introduced into the human parasite Entamoeba histolytica. Chemically synthesized, small interfering RNA (siRNA) were highly specific and efficient in silencing parasite gamma-tubulin mRNA. Use of specific antibodies revealed that microtubules and gamma-tubulin were intra-nuclear in E. histolytica. The RNAi approach to modulation of gamma-tubulin mRNA resulted in loss of the highly organized microtubule array an observation that correlates with a significant reduction of gamma-tubulin as well as of the specific mRNA. Our results suggest that gamma-tubulin is essential for microtubule nucleation in E. histolytica. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Parasitology U5 - J;Article AV - English IS - 0166-6851 UR - ISI:000225128100003 L2 - amoebiasis;RNAi;gamma-tubulin;Entamoeba;NUCLEAR DIVISION; INTERFERENCE; PARAMECIUM; EXPRESSION; MITOSIS; LOCALIZATION; DUPLICATION; ANTISENSE; AMEBIASIS; MOVEMENT SO - Molecular and Biochemical Parasitology 2004 ;138(1):21-28 12717 UI - 4238 AU - Vazquez-Ortiz FA AU - Moron-Fuenmayor OE AU - Gonzalez-Mendez NF AD - Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoUniv Zulia, Fac Agron, Maracaibo 4011, VenezuelaVazquez-Ortiz, FA, Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, Mexico TI - Hydroxyproline measurement by HPLC: Improved method of total collagen determination in meat samples AB - A sensitive and selective assay of hydroxyproline is presented for the determination of collagen in meat and meat products. The amino acid is converted to a sensitive fluorescent derivative with 7-chloro-4-nitro-benzofurazan (NBD-Cl), followed by reversed-phased chromatography and fluorescence measurement (ex = 465 nm, fl = 535 nm). Hydroxyproline and proline can be measured by this system. The column and detector performance shows good retention, selectivity, and efficiency. Based on replicated analysis of controls over a range of 0-20 mg/mL, the method is accurate (94-100%) and precise (%CV of 0.3-13). The limit of quantification for hydroxyproline and proline was 0.0027 ng/mL. Fourteen meat samples with different levels of collagen normally found in meat and meat products were tested. The results showed that the linear range of assay was suitable for routine analysis, and applicable to the entire range of hydroxyproline levels normally found in meat and meat products (0.05-12.5%) MH - Mexico|Sonora MH - Venezuela PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemical Research Methods;Chemistry, Analytical U5 - J;Article AV - English IS - 1082-6076 UR - ISI:000224386200009 L2 - hydroxyproline;collagen;meat samples;amino acids;INTRAMUSCULAR CONNECTIVE-TISSUE; LIQUID-CHROMATOGRAPHIC DETERMINATION; AMINO-ACID-ANALYSIS; DERIVATIZATION; BEEF; SEMITENDINOSUS; TENDERNESS; PRODUCTS; PROLINE; REAGENT SO - Journal of Liquid Chromatography & Related Technologies 2004 ;27(17):2771-2780 12718 UI - 4878 AU - Vazquez-Padron RI AU - de la Riva G AU - Aguero G AU - Silva Y AU - Pham SM AU - Soberon M AU - Bravo A AU - Aitouche A AD - Univ Miami, Dept Surg, Miami, FL 33101, USAUniv Miami, Vasc Biol Inst, Miami, FL 33101, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Cuernavaca 62250, Morelos, MexicoUniv Cent Las Villas, Fac Quim Farmacia, Santa Clara, Villa Clara, CubaCtr Nacl Invest Cient, Dept Genet, Havana, CubaVazquez-Padron, RI, Univ Miami, Dept Surg, R104,POB 019132, Miami, FL 33101 USA TI - Cryptic endotoxic nature of Bacillus thuringiensis Cry1Ab insecticidal crystal protein AB - Cry1Ab is one of the most studied insecticidal proteins produced by Bacillus thuringiensis during sporulation. Structurally, this protoxin has been divided in two domains: the N-terminal toxin core and the C-terminal portion. Although many studies have addressed the biochemical characteristics of the active toxin that corresponds to the N-terminal portion, there are just few reports studying the importance of the C-terminal part of the protoxin. Herein, we show that Cry1Ab protoxin has a unique natural cryptic endotoxic property that is evident when their halves are expressed individually. This toxic effect of the separate protoxin domains was found against its original host B. thuringiensis, as well as to two other bacteria, Escherichia coli and Agrohacterium tumefaciens. Interestingly, either the fusion of the C-terminal portion with the insecticidal domain-III or the whole N-terminal region reduced or neutralized such a toxic effect, while a non-Cry1A peptide such as maltose binding protein did not neutralize the toxic effect. Furthermore, the G terminal domain, in addition to being essential for crystal formation and solubility, plays a crucial role in neutralizing the toxicity caused by a separate expression of the insecticidal domain much like a dot/anti-dot system. (C) 2004 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies MH - USA MH - Cuba MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Biochemistry & Molecular Biology;Biophysics;Cell Biology U5 - J;Article AV - English IS - 0014-5793 UR - ISI:000222885400006 L2 - crystal toxin;insecticide;Cry1A;endotoxin;bacillus thuringiensis;TOXINS; GENE; TRANSFORMATION; CONSTRUCTION; EXPRESSION; FEATURES; PROTOXIN; BACTERIA; COLI SO - Febs Letters 2004 ;570(1-3):30-36 12719 UI - 3606 AU - Vazquez-Prado JV AU - Miyazaki H AU - Castellone MD AU - Teramoto H AU - Gutkind JS AD - NIDCR, Oral & Pharyngeal Canc Branch, NIH, Bethesda, MD 20892, USAInst Politecn Nacl, CINVESTAV, Dept Pharmacol, Mexico City 07000, DF, MexicoGutkind, JS, NIDCR, Oral & Pharyngeal Canc Branch, NIH, 30 Convent Dr,Bldg 30,Rm 211, Bethesda, MD 20892 USA TI - Chimeric G alpha(i2)/G alpha(13) proteins reveal the structural requirements for the binding and activation of the RGS-like (RGL)-containing Rho guanine nucleotide exchange factors (GEFs) by G alpha(13) AB - The alpha-subunit of G proteins of the G(12/13) family stimulate Rho by their direct binding to the RGS-like (RGL) domain of a family of Rho guanine nucleotide exchange factors (RGL-RhoGEFs) that includes PDZ-RhoGEF (PRG), p115RhoGEF, and LARG, thereby regulating cellular functions as diverse as shape and movement, gene expression, and normal and aberrant cell growth. The structural features determining the ability of Galpha(12/13) to bind RGL domains and the mechanism by which this association results in the activation of RGL-RhoGEFs are still poorly understood. Here, we explored the structural requirements for the functional interaction between Galpha(13) and RGL-RhoGEFs based on the structure of RGL domains and their similarity with the area by which RGS4 binds the switch region of Galpha(i) proteins. Using Galpha(i2), which does not bind RGL domains, as the backbone in which Galpha(13) sequences were swapped or mutated, we observed that the switch region of Galpha(13) is strictly necessary to bind PRG, and specific residues were identified that are critical for this association, likely by contributing to the binding surface. Surprisingly, the switch region of Galpha(13) was not sufficient to bind RGL domains, but instead most of its GTPase domain is required. Furthermore, membrane localization of Galpha(13) and chimeric Galpha(i2) proteins was also necessary for Rho activation. These findings revealed the structural features by which Galpha(13) interacts with RGL domains and suggest that molecular interactions occurring at the level of the plasma membrane are required for the functional activation of the RGL-containing family of RhoGEFs MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000225793600049 L2 - LEUKEMIA-ASSOCIATED RHO; HETEROTRIMERIC G-PROTEINS; PDZ-RHOGEF; TRANSITION-STATE; GTP HYDROLYSIS; RGRGS DOMAIN; P115 RHOGEF; LARG; RECEPTOR; LOCALIZATION SO - Journal of Biological Chemistry 2004 ;279(52):54283-54290 12720 UI - 6066 AU - Vazquez B AU - Caballero A AU - Pena P AD - Univ Autonoma Nuevo Leon, Monterrey Nuevo Leon, MexicoCSIC, Inst Ceram & Vidrio, E-28049 Madrid, SpainVazquez, B, Univ Autonoma Nuevo Leon, Monterrey Nuevo Leon, Mexico TI - Primary crystallization volume of Al2O3 in the quaternary system AlO3CaO-MgO-SiO2 AB - Compatibility relations of Al2O3 in the quaternary system Al2O-CaO-MgO-SiO2 were determined, after firing and quenching on selected samples, by X-ray diffraction followed by scanning electron microscopy and energy dispersive X-ray examination. A projection of the boundary surface of the primary crystallisation volume of Al2O3 was constructed in terms of the CaO2 MgO and SiO2 contents of the mixtures recalculated to 100 wt%. Two invariant points, where three solids coexist with Al2O3 and a liquid phase were defined, and the positions of isotherms were also established MH - Mexico|Nuevo Leon MH - Spain PB - MADRID: SOCIEDAD ESPANOLA CERAMICA VIDRIO RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Ceramics U5 - J;Article AV - Spanish IS - 0366-3175 UR - ISI:000220041900005 L2 - phase equilibrium diagram;alumina (Al2O3);calcium hexaluminate (CaAl12O19);spinel (MgAl2O4);anorthite (CaAl2Si2O);mullite (Al6Si2O1);PART SO - Boletin de la Sociedad Espanola de Ceramica y Vidrio 2004 ;43(1):16-18 12721 UI - 6321 AU - Vazquez FG AU - Sharma VK AD - Florida Inst Technol, Dept Chem, Melbourne, FL 32901, USANatl Autonomous Univ Mexico, Inst Marine & Limnol, Mexico City 04510, DF, MexicoSharma, VK, Florida Inst Technol, Dept Chem, Melbourne, FL 32901, USA TI - Major and trace elements in sediments of the Campeche Sound, southeast Gulf of Mexico MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0025-326X UR - ISI:000188642800019 L2 - major elements;trace elements;sediments;contamination;southeast Gulf of Mexico;METAL CONCENTRATIONS; ESTUARINE; TEXAS SO - Marine Pollution Bulletin 2004 ;48(1-2):87-90 12722 UI - 5144 AU - Vazquez G AU - Favila ME AU - Madrigal R AU - del Olmo CM AU - Baltanas A AU - Bravo MA AD - AC, Inst Ecol, Xalapa 91070, Veracruz, MexicoUniv Autonoma Madrid, Fac Ciencias, Dept Ecol, E-28049 Madrid, SpainVazquez, G, AC, Inst Ecol, Apto Postal 63,Km 2-5 Carretera Antigua Coatepec, Xalapa 91070, Veracruz, Mexico TI - Limnology of crater lakes in Los Tuxtlas, Mexico AB - The purpose of this study was to characterize five crater lakes in Los Tuxtlas, Mexico, on the basis of morphological, physical, chemical, and biological features. A bathymetric map of each lake was obtained and morphometric parameters were calculated. Physical and chemical parameters ( temperature, transparency, nutrients, pH, conductivity, cations) and chlorophyll a were measured for three periods: the cold season ( January), the dry season ( May), and the rainy season ( October) of 2000. The trophic state of each lake was determined using Carlson's indices for transparency and chlorophyll a. The lakes studied have the morphometric characteristics of maar-type volcanic lakes. Majahual, Chalchoapan, and Manantiales are the deepest lakes with elliptical basins and are classified as warm monomictic systems; Verde and Mogo are shallow lakes with conic basins and are warm polymictic. Majahual and Chalchoapan had an anoxic hypolimnion, while at Manantiales a metalimnetic oxygen maximum was measured. Sodium was the dominant cation in the five lakes, while bicarbonate was the dominant anion. Nutrient and chlorophyll a concentrations, transparency, and trophic indices suggest that Chalchoapan, Verde, and Mogo are eutrophic lakes with tendencies toward hypereutrophy; Manantiales and Majahual, in contrast, can be classified as mesotrophic lakes. The trophic state of lakes was indirectly related to deforestation and to the use of agricultural fertilizer in Los Tuxtlas as well as to certain morphometric characteristics MH - Mexico|Veracruz MH - Spain PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 5 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000222264300007 L2 - crater lake;morphometry;warm monomictic;trophic state;tropical limnology;Mexico;COSTA-RICA; PRIMARY PRODUCTIVITY; RAIN-FOREST; RIO CUARTO; FEATURES; LAGUNA SO - Hydrobiologia 2004 ;523(1-3):59-70 12723 UI - 5672 AU - Vazquez LB AU - Cameron GN AU - Medellin RA AD - Univ Cincinnati, Dept Biol Sci, Cincinnati, OH 45221, USAUniv Nacl Autonoma Mexico, Inst Ecol, Morelia 58059, Michoacan, MexicoUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoCameron, GN, Univ Cincinnati, Dept Biol Sci, Cincinnati, OH 45221, USA TI - Characteristics of diet of Peromyscus aztecus and Reithrodontomys fulvescens in Montane Western Mexico AB - We tested whether differences in composition and nutrients of diet explained higher density of Peromyscus aztecus in mature cloud forest and higher density of Reithrodontomys fulvescens in disturbed cloud forest. P. aztecus ate dicot leaves, stems, fruit, and seeds in mature cloud forest and dicot leaves, stems, and seeds, and monocot seeds and insects during the dry-hot season in disturbed cloud forest. R. fulvescens ate dicot leaves, stems, fruit, and seeds in mature cloud forest but monocots and insects during the hot season; dicot leaves, stems, and seeds were eaten in disturbed cloud forest. The diet of P. aztecus contained more protein and soluble carbohydrates in disturbed cloud forest where rodent density was lower; the diet of R. fulvescens contained more protein, lipid, soluble carbohydrate, Na, Mg, and P in mature cloud forest where density was lower. Nutrient differences resulted from R. fulvescens eating more monocots and dicot fruit, P. aztecus eating more monocot seeds and less dicot fruit, and both species eating more insects. Differences in composition or nutrient content of diet did not explain between-habitat differences in demography because nutrients in diet were higher in habitat of lower rodent abundance, suggesting other factors must be considered MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - LAWRENCE: ALLIANCE COMMUNICATIONS GROUP DIVISION ALLEN PRESS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-2372 UR - ISI:000220884600002 L2 - cloud forest;Peromyscus aztecus;Reithrodontomys fulvescens;rodent diet;teosinte;tropical habitats;western Mexico;VOLES MICROTUS-PENNSYLVANICUS; RAT SIGMODON-HISPIDUS; SPINY POCKET MICE; FOOD QUALITY; COTTON RAT; POPULATION-DYNAMICS; COMMUNITY; RODENTS; REPRODUCTION; PROTEIN SO - Journal of Mammalogy 2004 ;85(2):196-205 12724 UI - 5751 AU - Vazquez ML AU - Valencia AS AU - Nixon KC AD - Natl Autonomous Univ Mexico, Fac Ciencias, Herbario, Mexico City 04510, DF, MexicoCornell Univ, LH Bailey Hortorium, Ithaca, NY 14853, USAVazquez, ML, Univ Illinois, Dept Biol, Springfield, IL 62794, USA TI - Notes on red oaks (Quercus sect. Lobatae) in eastern Mexico, with description of a new species, Quercus hirtifolia AB - Vazquez, M. L. (L. H. Bailey Hortorium, Cornell University, Ithaca, NY 14853-4301, U.S.A.; e-mail: Ivazq1@uis.edu), S. Valencia A. (Herbario de la Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad Universitaria, C. P 04510, Mexico; e-mail: svac@hp.fciencias. unam.mx) & K. C. Nixon (L. H. Bailey Hortorium, Cornell University, Ithaca, NY 14853-4301, U.S.A.; e-mail: kcn2@cornell.edu). Notes on red oaks (Quercus sect. Lobatae) in eastern Mexico, with description of a new species, Quercus hirtifolia. Brittonia 56: 136-142. 2004-This article provides descriptions of Quercus hirtifolia, a new oak species endemic to eastern Mexico, and of depressa, a species poorly characterized in the literature. Due to the morphological resemblance of Q. hirtifolia to Q. hintoniorum, Q. hypoxantha, Q. eduardii, Q. laurina, and Q. depressa, a dichotomous key for their identification is provided MH - Mexico|Distrito Federal MH - USA PB - BRONX: NEW YORK BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0007-196X UR - ISI:000220798200008 L2 - Fagaceae;Quercus;trichome;red oaks;Mexico SO - Brittonia 2004 ;56(2):136-142 12725 UI - 4985 AU - Vazquez MV AU - Moussatova A AU - Martinez A AU - Dolgounitcheva O AU - Zakrzewski VG AU - Ortiz JV AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoKansas State Univ, Dept Chem, Manhattan, KS 66506, USAMartinez, A, Natl Autonomous Univ Mexico, Inst Invest Mat, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Solvation of Al-guanine complexes with NH3: A theoretical study AB - Geometry optimizations on complexes composed of an Al atom, a guanine molecule, and an ammonia molecule have been performed with density functional methods. In the most stable structures, the ammonia molecule forms hydrogen bonds with previously studied Al-guanine complexes. The two lowest structures correspond to an unusual tautomer of guanine in which both N atoms of the five-membered ring, N7 and N9, are protonated. Within 3 kcal/mol in energy lie two additional structures in which a proton is shifted from N9 to N3. Ionization energies calculated with ab initio, electron-propagator methods for the two latter structures are in close agreement with the experimentally observed ionization threshold. Higher ionization energies are obtained for the two lowest structures. Dyson orbitals for the lowest ionization energies are guanine pi* functions. The order of isomers in the cationic species is different from that of the neutrals. Energies of ammonia dissociation are approximately equal for all forms of the Al-guanine-NH3 complex, except for a structure with an Al-NH3 dative bond MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Correction AV - English IS - 1089-5639 UR - ISI:000222477200012 L2 - IONIZATION ENERGIES; DNA; ADENINE SO - Journal of Physical Chemistry A 2004 ;108(27):5845-5850 12726 UI - 1810 AU - vear-Ordenes I AU - de Paz JA AU - Barrio JP AU - Cruz-Tomez AF AU - Gonzalez-Gallego J AD - Univ Leon, Dept Fisiol, Leon, SpainAssoc Mexicana Med Deporte, Mexico City, DF, Mexico TI - Physical exercise and urea levels in plasma, sweat and urine: Relationship with muscular damage MH - Mexico|Distrito Federal MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 0 U4 - Sport Sciences U5 - J;Meeting Abstract AV - English IS - 0195-9131 UR - ISI:000228188300145 SO - Medicine and Science in Sports and Exercise 2004 ;36(5):S30-S31 12727 UI - 4325 AU - vecilla-Ramirez G AU - Silva-Pereyra J AU - Harmony T AU - Sanchez L AD - UNAM, Inst Neurobiol, Mexico City, DF, MexicoUniv Washington, Inst Learning & Brain Sci, Seattle, WA 98195, USA TI - Working memory on semantic and syntac processing: An ERP study MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Psychology, Biological;Neurosciences;Physiology;Psychology;Psychology, Experimental U5 - J;Meeting Abstract AV - English IS - 0167-8760 UR - ISI:000223039900168 SO - International Journal of Psychophysiology 2004 ;54(1-2):72-72 12728 UI - 4981 AU - Vega E AU - Reyes E AU - Ruiz H AU - Garcia J AU - Sanchez G AU - Martinez-Villa G AU - Gonzalez U AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoUniv Nevada, Desert Res Inst, Reno, NV 89506, USAVega, E, Inst Mexicano Petr, Eje Cent Lazaro Gardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Analysis of PM2.5 and PM10 in the atmosphere of Mexico City during 2000-2002 AB - During the last 10 years, high atmospheric concentrations of airborne particles recorded in the Mexico City metropolitan area have caused concern because of their potential harmful effects on human health. Four monitoring campaigns have been carried out in the Mexico City metropolitan area during 2000-2002 at three sites: (1) Xalostoc, located in an industrial region; (2) La Merced, located in a commercial area; and (3) Pedregal, located in a residential area. Results of gravimetric and chemical analyses of 330 samples of particulate matter (PM) with an aerodynamic diameter less than 2.5 mum (PM2.5) and PM with an aerodynamic diameter less than 10 mum (PM10) indicate that (1) PM2.5/PM10 average ratios were 0.42, 0.46, and 0.52 for Xalostoc, La Merced, and Pedregal, respectively; (2) the highest PM2.5 and PM10 concentrations were found at the industrial site; (3) PM2.5 and PM10 concentrations were lower at nighttime; (4) PM2.5 and PM10 spatial averages concentrations were 35 and 76 mug/m(3), respectively; and (5) when the PM2.5 standard was exceeded, nitrate, sulfate, ammonium, organic carbon, and elemental carbon concentrations were high. Twenty-four hour averaged PM2.5 concentrations in Mexico City and Sao Paulo were similar to those recorded in the 1980s in Los Angeles. PM10 concentrations were comparable in Sao Paulo and Mexico City but 3-fold lower than those found in Santiago MH - Mexico|Distrito Federal MH - USA PB - PITTSBURGH: AIR & WASTE MANAGEMENT ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1047-3289 UR - ISI:000222513600004 L2 - CHEMICAL-COMPOSITION; SOUTHERN CALIFORNIA; AIR-QUALITY; PARTICLES SO - Journal of the Air & Waste Management Association 2004 ;54(7):786-798 12729 UI - 4095 AU - Vega G AU - Wolfmann J AD - Univ Nacl Autonoma Mexico, Direcc Gen Serv Computo Acad, Mexico City 04510, DF, MexicoUniv Toulon & Var, GRIM, F-83957 La Garde, FranceWolfmann, J, Univ Nacl Autonoma Mexico, Direcc Gen Serv Computo Acad, Mexico City 04510, DF, Mexico TI - Some families of Z(4)-cyclic codes AB - We introduce and solve several problems on Z(4)-cyclic codes. We study the link between Z(4)-linear cyclic codes and Z(4)-cyclic codes (not necessarily linear) obtained by using two binary linear cyclic codes. We use these results to present a family Of Z(4)-self-dual linear cyclic codes. (C) 2003 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1071-5797 UR - ISI:000224608900004 L2 - codes;cyclic codes over Z(4);Z(4)-self-dual linear cyclic codes;QUASI-CYCLIC CODES; Z(4) SO - Finite Fields and Their Applications 2004 ;10(4):530-539 12730 UI - 2891 AU - Vega MI AU - Huerta-Yepez S AU - Jazirehi AR AU - Garban H AU - Bonavida B AD - Univ Calif Los Angeles, Los Angeles, CA, USAUnidad Invest Med, La Raza, MexicoUniv Calif Los Angeles, Los Angeles, CA, USA TI - Rituximab-mediated inhibition of the transcription repressor Yin-Yang 1 (YY1) in NHL B cell lines: Upregulation of fas expression and sensitization to Fas-induced apoptosis MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000225127500289 SO - Blood 2004 ;104(11):85A-86A 12731 UI - 2893 AU - Vega MI AU - Huerta-Yepez S AU - Chinn P AU - Hariharan H AU - Hanna N AU - Bonavida B AD - Univ Calif Los Angeles, Los Angeles, CA, USAUnidad Invest Med, La Raza, MexicoBiogen IDEC Pharaceut, San Diego, CA, USA TI - Rituximab-mediated molecular cell signaling via CD20 in B-NHL cell lines: Autonomy from cross-linking with tumor FcRs MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000225127503406 SO - Blood 2004 ;104(11):929A-929A 12732 UI - 4501 AU - Vegas A AU - Mejia-Lopez J AU - Romero AH AU - Kiwi M AU - Santamaria-Perez D AU - Baonza VG AD - CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, SpainUniv Santiago Chile, Dept Fis, Santiago, ChileAdv Mat Dept, San Luis Potosi 78270, MexicoPontificia Univ Catolica Chile, Fac Fis, Santiago 22, ChileUniv Complutense Madrid, Fac Ciencias Quim, Dept Quim Fis 1, E-28040 Madrid, SpainVegas, A, CSIC, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain TI - Structural similarities between Ti metal and titanium oxides: implications on the high-pressure behavior of oxygen in metallic matrices AB - The stabilities of the body-centered-tetragonal and distorted-diamond phases of titanium are investigated by first-principles methods. Our results, together with previous experimental and theoretical work, confirm two interesting observations. First, that the metal arrays in oxides correspond to stable or metastable phases of the parent metal; and second, that oxygen provides the pressure medium that stabilizes these phases. In addition, we have confirmed that the bulk modulus of oxygen matrices follows a nearly universal behavior with pressure, and that pressure-induced phase transitions tend to occur when the compressibility of the oxygen matrix reaches the compressibility of the high-pressure phase of the oxide. (C) 2004 Elsevier SAS. All rights reserved MH - Chile MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 1293-2558 UR - ISI:000223702900006 L2 - titanium;titanium dioxide;high pressure;phase transformations;density functional theory calculations;CRYSTAL-STRUCTURES; PHASE-TRANSITIONS; OMEGA; COMPRESSION; EQUATIONS; DENSITY; ANATASE; CATIONS; RUTILE; STATE SO - Solid State Sciences 2004 ;6(8):809-814 12733 UI - 4733 AU - Veiga JP AU - Salvador A AU - Blazquez MC AU - Galina P AU - Merino S AD - CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, Madrid 28006, SpainCtr Invest Biol Noroeste, La Paz, Baja Calif Sur, MexicoVeiga, JP, CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, Jose Gutierrez Abascal 2, Madrid 28006, Spain TI - Does testosterone induce immunosuppression or immunoredistribution? An experimental test in three Mexican lizard species MH - Mexico|Baja California Sur MH - Spain PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0173-5373 UR - ISI:000223171200010 L2 - RED JUNGLE FOWL; REPRODUCING GREAT TITS; HEALTH STATE INDEXES; IMMUNE-RESPONSE; MATE CHOICE; STEROIDS; STRESS; MANIPULATION; COLORATION; HYPOTHESIS SO - Amphibia-Reptilia 2004 ;25(2):210-218 12734 UI - 4247 AU - Velarde JLG AU - Laguna M AD - ITESM Monterrey, Ctr Sistemas Manufactura, Monterrey 64849, NL, MexicoUniv Colorado, Leeds Sch Business, Boulder, CO 80309, USAVelarde, JLG, ITESM Monterrey, Ctr Sistemas Manufactura, Monterrey 64849, NL, Mexico TI - A Benders-based heuristic for the robust capacitated international sourcing problem AB - A common assumption when solving optimization problems is that all parameters are certain; however, in the real world, key data are often uncertain. In this paper, we introduce a formulation of the robust capacitated international sourcing problem. The main contribution of this work is that the formulation assumes a finite capacity, as opposed to the infinite-capacity assumption made in related studies. The formulation also deals with the uncertainty of relevant parameters, such as demand and exchange rates, and uses an objective function that incorporates a measure of risk. A heuristic search method based on Benders decomposition and tabu search is proposed and tested. The computational experiments showed that this method yields acceptable results MH - Mexico|Nuevo Leon MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Industrial;Operations Research & Management Science U5 - J;Article AV - English IS - 0740-817X UR - ISI:000224387700008 L2 - PLANT-LOCATION; FACILITY LOCATION; UNCERTAINTY; MODEL; PRICE SO - Iie Transactions 2004 ;36(11):1125-1133 12735 UI - 6213 AU - Velasco-Loyden G AU - Arribas J AU - Lopez-Casillas F AD - Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoHosp Univ Vall Hebron, Med Oncol Serv, Lab Rec Oncol, Barcelona 08035, SpainLopez-Casillas, F, Univ Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Apartado Postal 70-246, Mexico City 04510, DF, Mexico TI - The shedding of betaglycan is regulated by pervanadate and mediated by membrane type matrix metalloprotease-1 AB - Betaglycan is a membrane-anchored proteoglycan that binds transforming growth factor-beta (TGF-beta) via its core protein. A soluble form of betaglycan can be released by proteolytic cleavage ( also known as shedding) of the membrane-bound form, yielding soluble betaglycan. The mechanism leading to the generation of soluble betaglycan is poorly understood. Because the membrane and soluble forms of betaglycan have opposite effects regulating the availability of TGF-beta, it is important to characterize the shedding of betaglycan further. Here we present evidence showing that in certain cell types, pervanadate, a general tyrosine phosphatase inhibitor, induces the release of the previously described fragment that encompasses almost the entire extracellular domain of betaglycan (sBG-120). In addition, treatment with pervanadate unveils the existence of a novel 90-kDa fragment (sBG-90). Noticeably, the cleavage that generates sBG-90 is mediated by a tissue inhibitor of metalloprotease-2-sensitive protease. Overexpression of all membrane type matrix metalloproteases (MT-MMPs) described to date indicates that MT1-MMP and MT3-MMP are endowed with ability to generate sBG-90. Furthermore, the patterns of expression of different MT-MMPs in the cell lines used in this study suggest that MT1-MMP is the protease involved in the shedding of sBG-90. Overexpression of MT1-MMP in COS-1 cells, which do not express detectable levels of this metalloprotease, confirms the feasibility of this hypothesis. Unexpectedly, during the course of these experiments, we observed that MT2-MMP decreases the levels of MT1-MMP and betaglycan. Finally, binding competition experiments indicate that, similar to the wild type membrane betaglycan, sBG-90 binds the TGF-beta2 isoform with greater affinity than TGF-beta1, suggesting that once released, it could affect the cellular availability of TGF-beta MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 27 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000189103300045 L2 - NECROSIS-FACTOR-ALPHA; GROWTH-FACTOR-BETA; AMYLOID PRECURSOR PROTEIN; RECOMBINANT SOLUBLE BETAGLYCAN; TGF-BETA; CONVERTING-ENZYME; LIGAND-BINDING; III RECEPTOR; TYROSINE PHOSPHORYLATION; ENDOTHELIAL-CELLS SO - Journal of Biological Chemistry 2004 ;279(9):7721-7733 12736 UI - 3671 AU - Velasco-Santos C AU - Martinez-Hernandez AL AU - Castano VM AD - Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaeo 76000, MexicoUniv N Texas, Dept Mat Sci, Denton, TX 76203, USAInst Tecnol Queretaro, Dept Mat, Santiago De Queretaro 76000, Queretaro, MexicoInst Tecnol Queretaro, Dept Mecatron, Santiago De Queretaro 76000, Queretaro, MexicoCastano, VM, Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, AP 1-1010, Queretaeo 76000, Mexico TI - Hydrogen bonding of polystyrene latex nanospheres to sidewall carbon nanotubes AB - Carbon nanotubes and monodispersed nanoparticles are two of the most important building blocks proposed to create nanodevices. Also, the tendency to produce nanomachines with biomolecules has increased in the past few years. Because hydrogen bonding plays an important role in structuring many natural molecules, it is necessary to mimic the same "links" used by nature to form biomolecules such as DNA or proteins. In this paper, we show hydrogen bonding between open-tip and sidewall carbon nanotubes and polystyrene nanoparticles, produced at a pH adequate to create the same bond between natural systems and interesting nanoforms MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000225548700013 L2 - INFRARED-SPECTROSCOPY; ACETIC-ACID; RAMAN; FUNCTIONALIZATION; COMPLEXES; PROTEINS; SPECTRA SO - Journal of Physical Chemistry B 2004 ;108(49):18866-18869 12737 UI - 4708 AU - Velazquez-Manzanares M AU - Schiffrin DJ AD - Univ Mar, Inst Ecol, Oaxuca 70902, MexicoUniv Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, EnglandVelazquez-Manzanares, M, Univ Mar, Inst Ecol, Ciudad Univ S-N, Oaxuca 70902, Mexico TI - Kinetics of facilitated proton transfer by hydrophobic aromatic amines across the water/1,2-dichloroethane interface AB - The kinetics of proton transfer facilitated by 4-octylaniline, 4-dodecylaniline and 4-hexadecylaniline across the water/1,2-dichloroethane interface has been investigated by cyclic voltammetry and ac impedance. It was found that their electrochemical behaviour is very similar and the three amines assist proton transfer from the aqueous to the organic phase. The formal Gibbs energy of proton transfer and the formal rate constant were evaluated. It is concluded that interfacial organisation of these molecules is an important factor in the kinetics of facilitated proton transfer and that the aromatic ring is able to penetrate the interface whilst the long hydrophobic chain contributes to the stability of the amine in the organic phase. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Oaxaca PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000223262200014 L2 - ITIES;amines;ac impedance;facilitated proton transfer;liquid/liquid interfaces;WATER NITROBENZENE INTERFACE; IMMISCIBLE ELECTROLYTE-SOLUTIONS; IONIC PARTITION DIAGRAMS; PICRATE ION; PHASE; IMPEDANCE; 1,2-DICHLOROETHANE; COEFFICIENTS; DRUGS SO - Electrochimica Acta 2004 ;49(26):4651-4658 12738 UI - 4691 AU - Velazquez-Meza ME AU - de Sousa MA AU - Echaniz-Aviles G AU - Solorzano-Santos F AU - Miranda-Novales G AU - Silva-Sanchez J AU - de Lencastre H AD - Rockefeller Univ, Microbiol Lab, New York, NY 10021, USACtr Invest Sobre Enfermedades Infecciosas, Inst Nacl Salud Publ, Cuernavaca, Morelos, MexicoHosp Pediat Mexico City, Ctr Med Nacl, Siglo XXI, IMSS, Mexico City, DF, MexicoUniv Nova Lisboa, Genet Mol Lab, Inst Tecnol Quim & Biol, Oeiras, Portugalde Lencastre, H, Rockefeller Univ, Microbiol Lab, 1230 York Ave, New York, NY 10021 USA TI - Surveillance of methicillin-resistant Staphylococcus aureus in a pediatric hospital in Mexico city during a 7-year period (1997 to 2003): Clonal evolution and impact of infection control AB - Between 1997 and 2000 a single multidrug-susceptible methicillin-resistant Staphylococcus aureus clone, M (sequence type 30 [ST30]-staphylococcal cassette chromosome mec [SCCmec] type IV), was present in a pediatric hospital in Mexico City, Mexico. In 2001 the international multidrug-resistant New York-Japan clone (ST5-SCCmec type II) was introduced into the hospital, completely replacing clone M by 2002 MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA MH - Portugal PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 12 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000223286500083 L2 - FIELD GEL-ELECTROPHORESIS; MOLECULAR EPIDEMIOLOGY; PANDEMIC CLONES; MULTIPLEX PCR; STRAINS; GENES; IDENTIFICATION; CHILDREN; DISEASE; MRSA SO - Journal of Clinical Microbiology 2004 ;42(8):3877-3880 12739 UI - 5301 AU - Velazquez PF AU - Riera A AU - Raga AC AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, Escola Univ Politecn Vilanova La Geltru, Vilanova I La Geltru 08800, SpainUniv Barcelona, Dept Astron & Mieteorol, E-08028 Barcelona, SpainVelazquez, PF, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Apdo Postal 70-543, Mexico City 04510, DF, Mexico TI - Time-dependent ejection velocity model for the outflow of Hen 3-1475 AB - We present 2D axisymmetric and 3D numerical simulations of the proto-planetary nebula Hen 3-1475, which is characterized by a remarkably highly collimated optical jet, formed by a string of shock-excited knots along the axis of the nebula. It has recently been suggested that the kinematical and morphological properties of the Hen 3-1475 jet could be the result of an ejection variability of the central source (Riera et al. 2003). The observations suggest a periodic variability of the ejection velocity superimposed on a smoothly increasing ejection velocity ramp. From our numerical simulations, we have obtained intensity maps (for different optical emission lines) and position-velocity diagrams, in order to make a direct comparison with the HST observations of this object. Our numerical study allows us to conclude that a model of a precessing jet with a time-dependent ejection velocity, which is propagating into an ISM previously perturbed by an AGB wind, can successfully explain both the morphological and the kinematical characteristics of this proto-planetary nebula MH - Mexico|Distrito Federal MH - Spain PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000221913100025 L2 - ISM : jets and outflows;planetary nebulae : individual : Hen 3-1475;methods : numerical;hydrodynamics;PROTOPLANETARY NEBULA HE-3-1475; NEAR-INFRARED PHOTOMETRY; GIANT BRANCH WIND; PLANETARY-NEBULAE; COLLIMATED OUTFLOWS; JETS; BIPOLAR; STELLAR; GASDYNAMICS; SIMULATIONS SO - Astronomy & Astrophysics 2004 ;419(3):991-998 12740 UI - 6356 AU - Velazquez PF AU - Martinell JJ AU - Raga AC AU - Giacani EB AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Astron & Fis Espacio, RA-1428 Buenos Aires, DF, ArgentinaVelazquez, PF, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Effects of thermal conduction on the X-ray and synchrotron emission from supernova remnants AB - Several physical mechanisms have been studied in order to explain why composite supernova remnants (SNRs) have shell-like morphologies in the radio continuum while their X-ray emission is centrally peaked. One of the proposed mechanisms has been the presence of thermal conduction, which can raise the density at the center of SNRs, increasing the X-ray emission from these regions. In this work, we have carried out axisymmetric numerical simulations with the adaptive grid Yguazu-a code, which includes advection of the magnetic field and thermal conduction. We have considered cases with anisotropic and isotropic thermal conduction, as well as with no conduction. We have simulated X-ray (as well as radio synchrotron) emission maps from our numerical simulations, which can be directly compared with observations MH - Argentina MH - Mexico|Distrito Federal PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000188658100022 L2 - conduction;ISM : magnetic fields;methods : numerical;supernova remnants;X-rays : ISM;FORMED DENSE SHELL; GHZ SKY SURVEY; INTERSTELLAR-MEDIUM; EVAPORATING CLOUDS; MAGNETIC-FIELDS; ATOMIC DATABASE; HOT INTERIOR; MODELING W44; NEUTRON-STAR; EVOLUTION SO - Astrophysical Journal 2004 ;601(2):885-895 12741 UI - 6189 AU - Velumani S AU - Narayandass SK AU - Mangalaraj D AU - Sebastian PJ AU - Mathew X AD - Inst Mexicano Petr, Coordinac Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoBharathiar Univ, Dept Phys, Coimbatore 641046, Tamil Nadu, IndiaUNAM, CIE, Solar Mat Dept, Temixco 62580, Morelos, MexicoVelumani, S, Inst Mexicano Petr, Coordinac Invest & Desarrollo Ductos, Eje Cent Lazaro Cardenas,No 152, Mexico City 07730, DF, Mexico TI - Dielectric and conduction studies on hot-wall deposited CdSe films AB - CdSe films are deposited using hot-wall deposition technique on glass and ITO substrates. From the XRD analysis, the structural parameters like crystallite size, dislocation density and strain were calculated. Films had preferential orientation along (0 0 2) and the structure of the film corresponded to wurtzite nature. From the EDAX analysis a slight increase in the cadmium content is observed as thickness increases. The dielectric study has been carried out on the stoichiometric films at different frequencies and temperatures to study their effect on capacitance, dielectric constant and dielectric loss. To explore the effect of illumination on these fundamental dielectric parameters, measurements are taken in dark as well as under an illumination of 10001x. and observed slight variation in these parameters. The temperature coefficient of capacitance, relative permittivity and linear expansion coefficient are evaluated. From the AC conduction studies the conduction was found to be due to hopping. Variation of conductivity with temperature reveals the presence of two activation energies. The Mott-Schottky plot for the films yields the value for carrier concentration in the range 10(17)-10(18) cm(-3) and the conduction was found to be n-type. (C) 2003 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000189082200005 L2 - CdSc;dielectric properties;conduction studies;thin films;SELENIDE THIN-FILMS; OPTICAL-PROPERTIES; CADMIUM; DEPENDENCE; EPITAXY; SILICON SO - Solar Energy Materials and Solar Cells 2004 ;81(3):323-338 12742 UI - 5445 AU - Venger EF AU - Korsunska NO AU - Semenova GN AU - Klad'ko VP AU - Mazin MO AU - Borkovska LV AU - Kushnirenko VI AU - Sadofyev YG AU - Kryshtab TG AU - Vidal MA AU - Vargas IP AD - Inst Politecn Nacl, ESFM, Dept Mat Sci, UPALM,Col Lindavista, Mexico City 07738, DF, MexicoNatl Acad Sci Ukraine, Inst Semicond Phys, Kiev, UkraineRussian Acad Sci, Lebedev Phys Inst, Moscow 117901, RussiaUniv Autonoma San Luis Potosi, Inst Invest Commun Opt, San Luis Potosi, MexicoKryshtab, TG, Inst Politecn Nacl, ESFM, Dept Mat Sci, UPALM,Col Lindavista, Av IPN,Edificio 9, Mexico City 07738, DF, Mexico TI - Effect of structural imperfections on luminescence of ZnCdSe/ZnSe quantum wells AB - The structural and luminescence properties of Zn1-xCdxSe/ZnSe multi-quantum well (MQW) structures with high molar fraction of cadmium (30-50%) and wide ZnSe barriers (50. 100 and 500 nm) grown by molecular beam epitaxy (MBE) have been investigated by high-resolution X-ray diffraction (HRXRD) and photoluminescence (PL) methods. It is shown that the fluctuations of composition within the quantum well layer determine the full-width at half maximum (FWHM) of the QW photoluminescence peak. The unusual polarization characteristics of this photoluminescence have been observed. The emission peak in the edge geometry is strongly polarized perpendicularly to the QW plane. This effect is ascribed to the localization of the ground-state heavy-hole-like excitons in the regions with increased cadmium content. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Russia MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 0925-8388 UR - ISI:000221562000050 L2 - quantum wells;X-ray diffraction;electronic states (localized);luminescence;SUPERLATTICES; DOTS SO - Journal of Alloys and Compounds 2004 ;371(1-2):202-205 12743 UI - 4125 AU - Venguer AP AU - Medina JL AU - Chavez RA AU - Velazquez A AU - Zamudio A AU - Il'In GN AD - CICESE, Res Ctr, Ensenada, Baja California, MexicoSAO, St Petersburg Branch, St Petersburg, RussiaVenguer, AP, CICESE, Res Ctr, Ensenada, Baja California, Mexico TI - Theoretical and experimental analysis of resonant microwave reflection amplifiers AB - In this article, the one-port transistor amplifier (OPTA) is studied in detail. This kind of amplifier offers a higher gain, with higher power efficiency at microwave frequencies, than a conventional two-port transmission amplifier. A new theoretical approach to the analysis of the reflection amplifier is applied, resulting in an analytical expression to estimate the transmission gain. An explanation of the principle of operation of this new resonant circuit type transistor amplifier is presented. Results of the gain characteristics are included, comparing the proposed gain expression with experimental results at L-band MH - Mexico|Baja California MH - Russia PB - NORWOOD: HORIZON HOUSE PUBLICATIONS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Telecommunications U5 - J;Article AV - English IS - 0192-6225 UR - ISI:000224534900014 L2 - NEGATIVE-RESISTANCE; LOW-NOISE SO - Microwave Journal 2004 ;47(10):80-+ 12744 UI - 6114 AU - Vera-Cabrera L AU - Ochoa-Felix EY AU - Gonzalez G AU - Tijerina R AU - Choi SH AU - Welsh O AD - Univ Hosp, Serv Dermatol, Lab Interdisciplinario Invest Dermatol, Monterrey 64460, Nuevo Leon, MexicoUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Nuevo Leon, MexicoDong A Pharmaceut Co, Res Lab, Yongin, South KoreaVera-Cabrera, L, Univ Hosp, Serv Dermatol, Lab Interdisciplinario Invest Dermatol, Madero & Gonzalitos,Colonia Mitras Ctr, Monterrey 64460, Nuevo Leon, Mexico TI - In vitro activities of new quinolones and oxazolidinones against Actinomadura madurae AB - In this work, we studied the in vitro sensitivity of 24 strains of Actinomadura madurae to a new oxazolidinone (DA-7867), gatifloxacin, moxifloxacin, and garenoxacin by using a broth microdilution method. We observed that the A. madurae strains had a high level of sensitivity to all the antimicrobials tested. The most active drug was DA-7867, with a MIC at which 90% of the strains are inhibited (MIC90) of 0.125 mug/ml and a MIC50 of 0.06 mug/ml MH - Mexico|Nuevo Leon MH - South Korea PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 4 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000189351700051 L2 - MYCETOMA SO - Antimicrobial Agents and Chemotherapy 2004 ;48(3):1037-1039 12745 UI - 6365 AU - Vera-Cabrera L AU - Gonzalez E AU - Choi SH AU - Welsh O AD - UANL, Univ Hosp, Serv Dermatol, Lab Interdisciplinario Invest Dermatol, Monterrey 64460, NL, MexicoDong A Pharm Co Ltd, Res Lab, Yongin, South KoreaVera-Cabrera, L, UANL, Univ Hosp, Serv Dermatol, Lab Interdisciplinario Invest Dermatol, Madero & Gonzalitos,Colonia Mitras Ctr, Monterrey 64460, NL, Mexico TI - In vitro activities of new antimicrobials against Nocardia brasiliensis AB - The in vitro sensitivities of 30 strains of Nocardia brasiliensis to DA-7867, gatifloxacin, moxifloxacin, and BMS-284756 (garenoxacin) were determined using the broth microdilution method. All N. brasiliensis strains were sensitive to these antimicrobials. The most active drug in vitro was DA-7867, with a MIC at which 90% of the isolates tested were inhibited of 0.03 mug/ml and a MIC at which 50% of the isolates tested were inhibited of 0.06 mug/ml MH - Mexico|Nuevo Leon MH - South Korea PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 7 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000188592200034 L2 - MYCETOMA SO - Antimicrobial Agents and Chemotherapy 2004 ;48(2):602-604 12746 UI - 4570 AU - Vera-Estrella R AU - Barkla BJ AU - Bohnert HJ AU - Pantoja O AD - Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62250, Morelos, MexicoUniv Illinois, Dept Plant Biol, Urbana, IL 61801, USAUniv Illinois, Dept Crop Sci, Urbana, IL 61801, USAVera-Estrella, R, Univ Nacl Autonoma Mexico, Inst Biotechnol, Dept Biol Mol Plantas, Cuernavaca 62250, Morelos, Mexico TI - Novel regulation of aquaporins during osmotic stress AB - Aquaporin protein regulation and redistribution in response to osmotic stress was investigated. Ice plant (Mesembryanthemum crystallinum) McTIP1;2 (McMIPF) mediated water flux when expressed in Xenopus leavis oocytes. Mannitol-induced water imbalance resulted in increased protein amounts in tonoplast fractions and a shift in protein distribution to other membrane fractions, suggesting aquaporin relocalization. Indirect immunofluorescence labeling also supports a change in membrane distribution for McTIP1;2 and the appearance of a unique compartment where McTIP1;2 is expressed. Mannitol-induced redistribution of McTIP1;2 was arrested by pretreatment with brefeldin A, wortmannin, and cytochalasin D, inhibitors of vesicle trafficking-related processes. Evidence suggests a role for glycosylation and involvement of a cAMP-dependent signaling pathway in McTIP1;2 redistribution. McTIP1;2 redistribution to endosomal compartments may be part of a homeostatic process to restore and maintain cellular osmolarity under osmotic-stress conditions MH - Mexico|Morelos MH - USA PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 40 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000223482400042 L2 - VACUOLAR H+-ATPASE; PLASMA-MEMBRANE AQUAPORINS; MESEMBRYANTHEMUM-CRYSTALLINUM; ARABIDOPSIS-THALIANA; PLANT-CELLS; INTRINSIC PROTEINS; BREFELDIN-A; SALT STRESS; WATER; TOBACCO SO - Plant Physiology 2004 ;135(4):2318-2329 12747 UI - 3810 AU - Verde Y AU - Alonso G AU - Ramos V AU - Zhang H AU - Jacobson AJ AU - Keer A AD - Ctr Invest Mat Avanzados, Chihuahua 31109, MexicoInst Tecnol Cancun, Cancun 77500, MexicoUniv Houston, Dept Chem, Houston, TX 77204, USAVerde, Y, Ctr Invest Mat Avanzados, Chihuahua 31109, Mexico TI - Pt/C obtained from carbon with different treatments and (NH4)(2)PtCl6 as a Pt precursor AB - Ammonium hexachloroplatinate (IV) ((NH4)(2)PtCl6) has been shown to be a good precursor to obtain metallic Pt by thermal decomposition, in addition to being a stable compound easily obtained from a variety of Pt recovery processes, such as fuel cell electrode recycling. Its low decomposition temperature and its relatively high water solubility make it a suitable choice to produce Pt on carbon for proton exchange membrane (PEM) fuel cells, however, it has not been found reported as precursor in the preparation of Pt/C for PEMFC. This work presents the characterization of Pt/C catalysts prepared with a new method employing both commercial and synthesized (NH4)(2)PtCl6 as well as commercial Pt(NH3)(4)Cl-2 for comparison. With this method, the production of Pt/C using Pt(NH3)4Cl(2) yields lower loadings than with (NH4)(2)ptCl(6). It is proposed that supporting Pt/C using (NH4)(2)PtCl6, takes place by adsorption on the carbon surface of the ptC(6)(2-) and the 16 Pt(II)Cl-3(-) when it is reduced from Pt(IV). Not only were oxygen complexes at the carbon surface found to have an effect on Pt loading and on the Pt particle size distribution of the samples prepared but also on the in situ Pt reduction-carbon oxidation during the reaction. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Quintana Roo MH - Mexico|Chihuahua MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Physical;Environmental Sciences U5 - J;Article AV - English IS - 0926-860X UR - ISI:000225343100023 L2 - electrocatalyst;carbon;ammonium hexachoroplatinate;Pt/C;fuel cell;SUPPORTED PLATINUM CATALYSTS; GAS-PHASE HYDROGENATION; ELECTROLYTE FUEL-CELL; OXYGEN-SURFACE GROUPS; ACTIVATED CARBONS; FUNCTIONAL-GROUPS; AQUEOUS-SOLUTION; PARTICLE-SIZE; REDUCTION; GRAPHITE SO - Applied Catalysis A-General 2004 ;277(1-2):201-207 12748 UI - 5321 AU - Verdoy D AU - Lucas MM AU - Manrique E AU - Covarrubias AA AU - De Felipe MR AU - Pueyo JJ AD - CSIC, Dept Plant Physiol & Biochem, E-28006 Madrid, SpainCSIC, Dept Environm Biol, Ctr Ciencias Medioambientales, E-28006 Madrid, SpainUNAM, Dept Plant Mol Biol, Inst Biotecnol, Cuernavaca 62250, Morelos, MexicoPueyo, JJ, CSIC, Dept Plant Physiol & Biochem, Serrano 115, E-28006 Madrid, Spain TI - Differential organ-specific response to salt stress and water deficit in nodulated bean (Phaseolus vulgaris) AB - Nodulated bean plants were exposed to mild salt stress or water deficit in such a way that the nodule's nitrogen-fixing activity was reduced to about 25-30% that of controls. Water-deprived plants showed a slight decrease in the weight of the aerial part, whereas the photosynthetic parameters were not significantly affected. In contrast, salt-stressed plants displayed a reversible decrease in the quantum yield of photosystem II photochemistry. Five waterdeficit responsive cDNA clones encoding one lipid transfer protein, two late-embryo genesis abundant (LEA) proteins and two proline-rich proteins (PRPs) showed different organ-specific expression patterns depending on the kind of stress applied. PRPs and one LEA protein, PvLEA-18, exhibited the highest expression in nodules. Anti-PvLEA-18 antibodies were used to immunolocalize the protein in the nodule. PvLEA-18 was localized in the cytoplasm and nucleus of nodule cortex cells, and preferentially in cells of the vascular bundles, showing enhanced accumulation under water deficit. To our knowledge, this is the first time that a LEA protein has been identified in legume nodules MH - Mexico|Morelos MH - Spain PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences U5 - J;Article AV - English IS - 0140-7791 UR - ISI:000221873700010 L2 - late-embryogenesis abundant proteins;legumes;lipid transfer proteins;nitrogen fixation;nodule;proline-rich proteins;CELL-WALL PROTEINS; LIPID TRANSFER PROTEIN; DIFFUSION BARRIER OPERATION; OXIDATIVE CROSS-LINKING; PEA ROOT-NODULES; MOLECULAR RESPONSES; NITROGEN-FIXATION; CHLOROPHYLL FLUORESCENCE; SIGNAL-TRANSDUCTION; POLYETHYLENE-GLYCOL SO - Plant Cell and Environment 2004 ;27(6):757-767 12749 UI - 3591 AU - Vergara CH AU - Michener CD AD - Univ Amer, Dept Quim & Biol, Santa Catarina 72820, Puebla, MexicoUniv Kansas, Museum Nat Hist, Div Entomol, Lawrence, KS 66045, USAUniv Kansas, Entomol Program, Dept Ecol & Evolut Biol, Lawrence, KS 66045, USAVergara, CH, Univ Amer, Dept Quim & Biol, Santa Catarina 72820, Puebla, Mexico TI - A new species of Caupolicana s.str. from the Tehuacan-Cuicatlan Valley, Mexico, and a key to north American species of the subgenus (Hymenoptera : Colletidae) AB - Caupolicana (Caupolicana) evansi, a new species similar to C. yarrowri (Cresson), is described from the Valley of Zapotitlan de las Salinas, in the Tehuacan Desert and from the nearby Cuicatlan Valley of Mexico. A key to the six North American species of Caupolicana s.slr. is included. RESUMEN: Se describe a Caupolicana (Caupolicana) evansi, una nueva especie, similar a C. yarrowi (Cresson). La especie descrita se encuentra en el Desierto de Tehuacan y en el Valle de Cuicatlan, en Mexico. Se incluye una clave par a las seis especies norteamericanas de Caupolicana s.str MH - Mexico|Puebla MH - USA PB - LAWRENCE: KANSAS ENTOMOLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0022-8567 UR - ISI:000225775300034 L2 - Caupolicana evansi;Diphaglossinae;Colletidae;Puebla;Oaxaca;Tehuacan-Cuicatlan Valley;Mexico SO - Journal of the Kansas Entomological Society 2004 ;77(4):783-787 12750 UI - 4001 AU - Vergara JA AU - Caffesse RG AD - Univ Autonoma Nuevo Leon, Monterrey, MexicoVergara, JA, 3730 Kirby Dr,Suite 601, Houston, TX 77098, USA TI - Localized gingival recessions treated with the original envelope technique: A report of 50 consecutive patients AB - Background: The surgical techniques used to treat gingival recession have changed considerably in the last 50 years. The envelope technique described nearly 20 years ago still offers an excellent alternative for the problem of recession. The purpose of this retrospective study is to show the results of 115 recession sites treated in 50 patients using the envelope technique. Methods: One hundred-flfteen consecutive procedures were performed in 50 patients in a private practice in the last 5 years using the envelope technique. Briefly, the teeth are scaled, a split thickness flap is performed around the recession, a subepithelial connective tissue graft is harvested from the palate and placed over the recession, and sutured with 6-0 silk. Four cases representing different types of recession will be reviewed and all cases will be analyzed. Results: In general, this surgical method provided excellent root coverage and an increased amount of keratinized gingiva. The complete root coverage mean was 85%, 65%, and 16% for recession Class I, II, and IV, respectively. Conclusion: The cases support the use of the envelope technique to treat different types of single and multiple recessions MH - Mexico|Nuevo Leon MH - USA PB - CHICAGO: AMER ACAD PERIODONTOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-3492 UR - ISI:000224772100014 L2 - follow-up studies;gingival recession/surgery;gingival recession/therapy;grafts, connective tissue;surgical flaps;CONNECTIVE-TISSUE GRAFT; ROOT COVERAGE SO - Journal of Periodontology 2004 ;75(10):1397-1403 12751 UI - 4002 AU - Vermeij GJ AU - Herbert GS AU - Vega FJ AU - Perrilliat MD AD - Univ Calif Davis, Dept Geol, Livermore, CA 95616, USAInst Geol, Mexico City 04510, DF, MexicoVermeij, GJ, Univ Calif Davis, Dept Geol, 1 Shields Ave, Livermore, CA 95616 USA TI - Mexfusus rotundicostatus, a new genus and species of neogastropod from the Late Cretaceous of southern Mexico AB - Mexfusus rotundicostatus new genus and species is a neogastropod of uncertain affinities from the Late Cretaceous (Early Maastrichtian) Mexcala Formation of southern Mexico. It is characterized by strong, rounded, axial ribs, fine spinelets at the intersection of axial ribs and sharp spiral cords, subsutural cord, strong simple spiral cords, and an apparently smooth, glazed columellar lip. A possible second species is Peristemia conica Riedel, 1932 from the Coniacian of Cameroon MH - USA MH - Mexico|Distrito Federal PB - LAWRENCE: PALEONTOLOGICAL SOC INC RP - NOT IN FILE U3 - TC 1 U4 - Paleontology U5 - J;Article AV - English IS - 0022-3360 UR - ISI:000224781800008 L2 - GASTROPOD SO - Journal of Paleontology 2004 ;78(6):1123-1127 12752 UI - 6469 AU - Veron-Cetty MP AU - Balayan SK AU - Mickaelian AM AU - Mujica R AU - Chavushyan V AU - Hakopian SA AU - Engels D AU - Veron P AU - Zickgraf FJ AU - Voges W AU - Xu DW AD - Observ Haute Provence, CNRS, F-04870 St Michel, FranceByurakan Astrophys Observ, Byurakan 378433, ArmeniaIsaac Newton Inst Chile, Armenian Branch, Byurakan 378433, ArmeniaINAOE, Puebla 72000, MexicoHamburger Sternwarte, D-21029 Hamburg, GermanyMax Planck Inst Extraterr Phys, D-85741 Garching, GermanyNatl Astron Observ, Beijing 100012, Peoples R ChinaVeron-Cetty, MP, Observ Haute Provence, CNRS, F-04870 St Michel, France TI - Optically bright active galactic nuclei in the ROSAT-Faint source catalogue AB - To build a large, optically bright, X-ray selected AGN sample we have correlated the ROSAT-FSC catalogue of X-ray sources with the USNO catalogue limited to objects brighter than O = 16.5 and then with the APS database. Each of the 3212 coincidences was classified using the slitless Hamburg spectra. 493 objects were found to be extended and 2719 starlike. Using both the extended objects and the galaxies known from published catalogues we built up a sample of 185 galaxies with O-APS < 17.0 mag, which are high-probability counterparts of RASS-FSC X-ray sources. 130 galaxies have a redshift from the literature and for another 34 we obtained new spectra. The fraction of Seyfert galaxies in this sample is 20%. To select a corresponding sample of 144 high-probability counterparts among the starlike sources we searched for very blue objects in an APS-based color-magnitude diagram. Forty-one were already known AGN and for another 91 objects we obtained new spectra, yielding 42 new AGN, increasing their number in the sample to 83. This confirms that surveys of bright QSOs are still significantly incomplete. On the other hand we find that, at a flux limit of 0.02 count s(-1) and at this magnitude, only 40% of all QSOs are detected by ROSAT MH - Armenia MH - France MH - Germany MH - Mexico|Puebla MH - Peoples R China PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000188249200013 L2 - quasars : general;X-rays : galaxies;galaxies : Seyfert;ALL-SKY SURVEY; X-RAY SOURCES; HAMBURG/RASS CATALOG; QUASAR EVOLUTION; COMPLETE SAMPLE; IDENTIFICATIONS; GALAXIES; OBJECTS; AGN SO - Astronomy & Astrophysics 2004 ;414(2):487-U39 12753 UI - 6276 AU - Veselkov A AU - Evstigneev MP AU - Veselkov DA AU - Santiago AAH AU - Davies DB AD - Sevastopol Natl Tech Univ, Dept Phys, UA-99011 Sevastopol, UkraineUniv London Kings Coll, Randall Ctr Mol Mechanisms Cell Funct, London SE1 1UL, EnglandAutonomous Univ Puebla, Dept Math & Phys, Puebla 72570, MexicoUniv London Birkbeck Coll, Sch Biol & Chem Sci, London WC1E 7HX, EnglandVeselkov, A, Sevastopol Natl Tech Univ, Dept Phys, UA-99011 Sevastopol, Ukraine TI - H-1 NMR investigation of the self-association of ethidiurn hornodirner and its complexation with propidium iodide in aqueous solution AB - The self-association of a bis-intercalator, ethidium homodimer (EBH), and its hetero-association with phenanthridine dye, propidium iodide (PI), have been studied by 1D and 2D H-1 NMR spectroscopy using the analysis of proton chemical shifts changes in aqueous solution as a function of concentration and temperature. Experimental results have shown that dynamic equilibrium in solution includes different conformational states of EBH molecules: folded (F) and unfolded (U) forms, a dimer form (F-2) where an aromatic chromophore of one of EBH molecules is inserted (intercalated) between the linked chromophores of the other homodimer molecule and a trimer complex (F-3) with two partitially intercalated aromatic chromophores between the chromophores of the folded EBH molecule. It has been found that EBH associates with propidium iodide forming 1:1 complex, where PI is inserted between the chromophores of the folded form, and 1:2 complex resulting from intercalation of PI into F-2 EBH dimer. Thermodynamical parameters of EBH self-association and complexation between EBH and PI have been determined and conclusions about the nature of the physical forces responsible for the formation of intermolecular complexes have been made. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Puebla MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000188886900003 L2 - bis-intercalator;ethidium homodimer;propidium iodide;association;NMR spectroscopy;DNA BIFUNCTIONAL INTERCALATORS; PROTON MAGNETIC-RESONANCE; HETERO-ASSOCIATION; THERMODYNAMICAL ANALYSIS; COMPETITIVE-BINDING; AROMATIC-MOLECULES; CAFFEINE; DRUGS; BROMIDE; DERIVATIVES SO - Journal of Molecular Structure 2004 ;690(1-3):17-24 12754 UI - 1921 AU - Veselkov AN AU - Evstigneev MP AU - Hernandez SA AU - Rogova OV AU - Veselkov DA AU - Davies DB AD - Sevastopol Natl Tech Univ, Sevastopol, UkraineUniv Autonoma Puebla, Puebla, MexicoUniv London, Birkbeck Coll, London, EnglandVeselkov, AN, Sevastopol Natl Tech Univ, Sevastopol, Ukraine TI - H-1 NMR study of heteroassociation of ethidium homodimer and propidium iodide in water AB - ID and 2D H-1 NMR spectroscopy (500 MHz) was used to study heteroassociation of the bifunctional intercalator ethidium homodimer (EBH) with a phenanthridine dye propidium iodide (PI) in an aqueous salt (0.1 mol/l NaCl). A physical model of equilibrium between various associated forms of ethidium homodimer and propidium in solution is suggested, the most probable forms being 1:1 and 1:2 complexes of P1with the EBH monomer and dimer. The chemical shifts of the EBH molecule in heterocomplexes, as well as the equilibrium constants and the thermodynamic parameters (enthalpy, entropy) of heteroassociations, were calculated from the concentration and temperature dependences of the proton chemical shifts. It is concluded that the propidium molecule is built (intercalated) into the EBH monomer and dimer to form 1:1 and 1:2 complexes mainly stabilized by dispersive and hydrophobic interactions MH - United Kingdom MH - Mexico|Puebla MH - Ukraine PB - NEW YORK: CONSULTANTS BUREAU/SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4766 UR - ISI:000230067500009 L2 - bis-intercalator;phenanthridine dye;ethidium homodimer;propidium iodide;heteroassociation;NMR analysis;DNA BIFUNCTIONAL INTERCALATORS; HETERO-ASSOCIATION; COMPETITIVE-BINDING; AQUEOUS-SOLUTION; CAFFEINE; DRUGS; DERIVATIVES; COMPLEXES; MOLECULES SO - Journal of Structural Chemistry 2004 ;45(5):793-799 12755 UI - 4818 AU - Veselkov AN AU - Evstigneev MP AU - Rozvadovskaya AO AU - Santiago AH AU - Zubchenok OV AU - Djimant LN AU - Davies DB AD - Sevastopol Natl Tech Univ, Dept Phys, UA-99053 Sevastopol, Crimea, UkraineUniv London Birkbeck Coll, Sch Biol & Chem Sci, London WC1E 7HX, EnglandAutonomous Univ Pueblo, Dept Phys & Math, Mexico City 72570, DF, MexicoVeselkov, AN, Sevastopol Natl Tech Univ, Dept Phys, UA-99053 Sevastopol, Crimea, Ukraine TI - H-1 NMR structural and thermodynamical analysis of the hetero-association of daunomycin and novatrone in aqueous solution AB - The complexation of antitumour antibiotics novatrone (NOV) and daunomycin (DAU) in aqueous solution has been studied by one- and two-dimensional H-1-NMR spectroscopy (500 MHz) in order to elucidate the probable molecular mechanism of the action of aromatic antitumour drugs in combination chemotherapy. The equilibrium reaction constants, thermodynamical parameters (DeltaH, DeltaS) of hetero-association of NOV with DAU and the limiting values of proton chemical shifts of the molecules in the hetero-complexes have been determined from the experimental concentration and temperature dependences of proton chemical shifts of the aromatic molecules. The most favourable structure of the 1:1 NOV-DAU hetero-association complex has been determined using both the molecular mechanics methods (X-PLOR software) and the limiting values of proton chemical shifts of the molecules. The obtained results have shown that intermolecular complexes between NOV and DAU molecules are mainly stabilized by stacking interactions of the aromatic chromophores. It is likely that there is an additional stabilization of the NOV-DAU hetero-complexes by intermolecular hydrogen bonds. It is concluded that aromatic molecules of antibiotics may form energetically stable hetero-association complexes in aqueous solution and hence effect their medical-biological (and probably toxic) activity. (C) 2004 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0022-2860 UR - ISI:000223021900006 L2 - antitumour antibiotic;novatrone;daunomycin;hetero-association;NMR spectroscopy;DOUBLE-STRANDED DNA; AROMATIC-MOLECULES; CAFFEINE; MITOXANTRONE; COMPLEXES; DRUGS; DOXORUBICIN SO - Journal of Molecular Structure 2004 ;701(1-3):31-37 12756 UI - 4578 AU - Viani RM AU - Araneta MR AU - Hubbard P AU - Ruiz-Calderon J AU - Spector S AU - Lopez G AD - Univ Calif San Diego, La Jolla, CA, USATijuana Gen Hosp, Tijuana, Baja Calif, Mexico TI - Rapid HIV testing during labor at Tijuana General Hospital, Baja California, Mexico MH - Mexico|Baja California MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591101936 SO - Pediatric Research 2004 ;55(4):328A-329A 12757 UI - 4836 AU - Vibhagool A AU - Cahn P AU - Schechter M AU - Smaill F AU - Soto-Ramirez L AU - Carosi G AU - Montroni M AU - Pharo CE AU - Jordan JC AU - Thomas NE AU - Pearce G AD - Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Med, Bangkok 10400, ThailandGlaxoSmithKline Res & Dev, Stat Antivirals, Biomed Data Sci, Greenford, Middx, EnglandGlaxoSmithKline, HIVIDHEP, Global Hlth Outcomes, Res Triangle Pk, NC, USAGlaxoSmithKline Res & Dev, HIV & Opportunist Infect Grp, Greenford, Middx, EnglandUniv Ancona, Azienda Ospedaliera Umberto I, Serv Reg Immunol Clin, Ancona, ItalyClin Malattie Infett & Trop, Brescia, ItalyInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoMcMaster Univ, Med Ctr, Hamilton, ON, CanadaHosp Univ Clementino Fraga Filho, Rio De Janeiro, BrazilFdn HUESPED, Buenos Aires, DF, ArgentinaVibhagool, A, Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Med, Rama VI Rd, Bangkok 10400, Thailand TI - Triple nucleoside treatment with abacavir plus the lamivudine/zidovuidine combination tablet (COM) compared to indinavir/COM in antiretroviral therapy-naive adults: results of a 48-week open-label, equivalence trial (CNA3014) AB - Objective: An equivalence (non-inferiority) trial comparing antiviral response, tolerability, and adherence with a triple nucleoside regimen containing abacavir 300 mg (ABC) plus a lamivudine 150-mg/zidovudine 300-mg combination tablet (COM) twice daily vs. a regimen containing the protease inhibitor indinavir (IDV) 800 mg three times daily plus COM twice daily (IDV/COM) in antiretroviral-naive, HIV-infected patients. Methods: Adult patients with plasma HIV-1 RNA levels greater than or equal to 5000 copies/mL and CD4+ cell counts greater than or equal to 100 cells/mm(3) were randomized to receive open-label ABC/COM (n = 169) or IDV/COM (n = 173) for 48 weeks. The intent-to-treat (ITT) population was the primary population evaluated. ITT: switch/missing equals failure (ITT: S/M = F) and as-treated (AT) analyses were used for assessing the proportion of patients achieving plasma HIV-1 RNA level < 400 and < 50 copies/mL at each clinic visit. In the ITT: S/M = F analysis, patients who switched treatment or had missing values were considered treatment failures; the AT analysis examined virologic data only while patients received study treatment. ABC/COM was considered equivalent (non-inferior) to IDV/COM if the lower limit of the 95% confidence intervals (CIs) about the difference in proportions of ABC/COM- vs. IDV/COM-treated patients attaining plasma HIV-1 RNA < 400 copies/mL exceeded -15% at week 48. Results: The study population was diverse with respect to ethnicity (38% Asian, 27% Hispanic, 28% white, 3% black, 4% other) and gender (39% women, 61% men). Baseline median HIV-1 RNA was 4.80 log(10) copies/mL and CD4+ cell count was 315 cells/mm(3). ABC/COM met the criterion of equivalence to IDV/COM. In the ITT: S/M = F analysis at Week 48, a greater proportion of ABC/COM-treated patients achieved HIV-1 RNA < 400copies/mL (66% [109/164] vs. 50% [82/165]; treatment difference 16.6%, 95% CI (6.0, 27.2), p = 0.002) and HIV-1 RNA < 50copies/mL (60% [99/164] vs. 50% [83/165]; treatment difference 9.6%, 95% CI [-1.1, 20.2]), whereas the AT analysis showed similar proportions achieving these endpoints (< 400copies/mL 85 vs. 83%; < 50 copies/mL 79 vs 81%). Comparable proportions of patients with screening HIV-1 RNA values > 100 000 copies/mL achieved HIV-1 RNA< 400 copies/mL (ABC/COM: 60% [35/58]; IDV/COM: 51% [33/65]; treatment difference 9.6%, 95% CI [-7.9, 27.1]; ITT S/M = F analysis). A significantly greater proportion taking ABC/COM were ! 95% adherent (72% [109/151] vs. 45% [70/154] with IDV/COM, p < 0.001). Median increases from baseline in CD4+ cell counts were similar in the two treatment groups (+148 vs. +152cells/mm(3)). Significantly more patients on IDV/COM reported drug-related adverse events (87% [142/165] vs. 65% [108/164] with ABC/COM, p < 0.001), similar proportions discontinued treatment due to adverse events (13 vs. 10%), and a slightly greater proportion in the ABC/COM group reported serious adverse events (13 vs. 8%). About half of the latter comprised suspected ABC-related hypersensitivity reactions (overall rate, 6%). Most adverse events were gastrointestinal in nature in both treatment groups. Conclusion: ABC/COM was at least equivalent to IDV/COM over 48 weeks in the treatment of antiretroviral-naive patients. ABC/COM was associated with a significantly higher adherence rate and lower incidence of drug-related adverse events than IDV/COM. The study was limited in that it was not powered to determine equivalence of treatments within high vs. low viral load strata, adherence was not monitored electronically, and bias could not be ruled out due to the open-label study design MH - Argentina MH - Brazil MH - Canada MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal MH - Thailand MH - USA PB - NEWBURY: LIBRAPHARM RP - NOT IN FILE U3 - TC 19 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0300-7995 UR - ISI:000222919800016 L2 - abacavir;combination antiretroviral therapy;combination tablet;indinavir;lamivudine/zidovudine;LAMIVUDINE-ZIDOVUDINE; INFECTED PATIENTS; HIV-INFECTION; LIPOATROPHY; INHIBITOR; MANAGEMENT; STAVUDINE SO - Current Medical Research and Opinion 2004 ;20(7):1103-1114 12758 UI - 4569 AU - Vicente SGC AU - Gamez MAM AU - Kir'yanov AV AU - Barmenkov YO AU - Andres MV AD - Ctr Invest Opt AC, Guanajuato 37150, MexicoUniv Valencia, Dept Fis Aplicada, ICMUV, E-46100 Burjassot, SpainRussian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow 119991, RussiaVicente, SGC, Ctr Invest Opt AC, Loma del Bosque,No 115,Col Lomas del Campestre, Guanajuato 37150, Mexico TI - Diode-pumped self-Q-switched erbium-doped all-fibre laser AB - A diode-pumped self-Q-switched erbium-doped fibre laser is developed and studied. The laser has an all-fibre configuration containing a piece of an active heavily erbium-doped fibre and two fibre Bragg grating mirrors and does not require any additional intracavity elements to obtain short pulses. Analysis of the laser operation suggests that the most probable mechanism of passive Q-switching of the laser cavity is absorption from the excited state of erbium resulting in the thermally induced nonlinear change in the refractive index in the erbium-doped fibre MH - Mexico|Guanajuato MH - Russia MH - Spain PB - LETCHWORTH: TURPION LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 1063-7818 UR - ISI:000223566800003 L2 - erbium-doped fibre lasers;self-Q-switching;excited-state absorption;nonlinear thermal lens;ABSORPTION; MODULATOR SO - Quantum Electronics 2004 ;34(4):310-314 12759 UI - 6173 AU - Vicente W AU - Salinas M AU - Barrios E AU - Dopazo C AD - Natl Autonomous Univ Mexico, Engn Inst, Mexico City 04510, DF, MexicoLITEC, Zaragoza, SpainUniv Zaragoza, Zaragoza, SpainVicente, W, Natl Autonomous Univ Mexico, Engn Inst, Mexico City 04510, DF, Mexico TI - PDF modeling of CO and NO formation in lean premixed methane flames AB - In this paper, CO and NO formation in a premixed turbulent methane flame is simulated with a stochastic model of combustion. The model proposed is a combination of both the computational fluid dynamics and the Monte Carlo methods for the solution of the joint probability density function. Finite chemical kinetics is represented by a GRI-derived reduced-chemistry model. This resultant model is used to simulate a lean, premixed, bluff-body, stabilized flame for which experimental data are available. Under this condition, the prediction of NO formation is a challenge because of its low concentrations (typically a few parts per million) and because every NO-formation route is relevant. The model used for the molecular mixing includes a variable mixing time, covering the range from the Kolmogorov scale to the integral scale. A lookup table is used to estimate the thermochemical properties and is found to be more adequate than direct integration. The results are compared with an experimental database MH - Mexico|Distrito Federal MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Energy & Fuels;Engineering, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0010-2202 UR - ISI:000189257500005 L2 - PDF;lean premixed combustion;CFD;Monte Carlo method;NOx;COMBUSTION; CLOSURE SO - Combustion Science and Technology 2004 ;176(4):585-601 12760 UI - 2783 AU - Vidal L AU - Pauly D AD - CINVESTAV, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoUniv British Columbia, Fisheries Ctr, Vancouver, BC V6T 1Z4, CanadaVidal, L, CINVESTAV, Ctr Invest & Estudios Avanzados, Antigua Carretera Progreso Km 6, Merida 97310, Yucatan, Mexico TI - Integration of subsystems models as a tool toward describing feeding interactions and fisheries impacts in a large marine ecosystem, the Gulf of Mexico AB - This contribution documents, using the example of the Gulf of Mexico large marine ecosystem (GoM) LME, how mass-balance, trophic ('Ecopath') models can be synthesized into a single integrated, spatially explicit model, from which various inferences on the ecological functioning of, and fisheries impacts on an LME can be drawn. The 10 component models used here covered inshore subsystems (lagoon, coral reefs), shelves, the open waters of the GoM, both in Mexican and US waters, and the GoMs Central Gyre, and were integrated using the Ecopath with Ecosim software. The main features of the synthetic trophic model resulting from this integration are presented, along with several time dynamic (Ecosim) and spatial simulations (Ecospace). Jointly, their results suggest the GoM to be rather robust as a whole, although continued increases in fishing effort, especially by bottom (shrimp) trawlers, will have serious impacts, reverberating through the entire shelf subsystem. (c) 2005 Published by Elsevier Ltd MH - Canada MH - Mexico|Yucatan PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000227621600009 L2 - ECOPATH SO - Ocean & Coastal Management 2004 ;47(11-12):709-725 12761 UI - 4299 AU - Vijande J AU - Garcilazo H AU - Valcarce A AU - Fernandez F AD - Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoVijande, J, Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, Spain TI - Spectroscopy of doubly charmed baryons AB - We study the mass spectrum of baryons with two and three charmed quarks. For double charm baryons the spin splitting is found to be smaller than standard quark-model potential predictions. This splitting is not influenced either by the particular form of the confining potential or by the regularization taken for the contact term of the spin-spin potential. We consistently predict the spectra for triply charmed baryons MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000224275200042 L2 - QUARK-MODEL; LATTICE QCD; ALPHA(S); MASSES SO - Physical Review D 2004 ;70(5): 12762 UI - 5545 AU - Vijande J AU - Gonzalez P AU - Garcilazo H AU - Valcarce A AD - Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, SpainUniv Valencia, CSIC, Dept Fis Teor, E-46100 Valencia, SpainUniv Valencia, CSIC, IFIC, E-46100 Valencia, SpainInst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoVijande, J, Univ Salamanca, Grp Fis Nucl, E-37008 Salamanca, Spain TI - Screened potential and the baryon spectrum AB - We show that in a quark model scheme the use of a screened potential, suggested by lattice QCD, instead of one infinitely rising with the interquark distance, provides a more adequate description of the high-energy baryon spectrum. In particular, an almost perfect parallelism between the predicted and observed number of states comes out, throwing new light on the so-called missing resonance problem MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000221253900037 L2 - TUBE-BREAKING MECHANISM; YANG-MILLS THEORY; QUARK-MODEL; STRING BREAKING; HYPERFINE INTERACTIONS; CHROMODYNAMICS; RESONANCES; DECAYS; COUPLINGS; QCD SO - Physical Review D 2004 ;69(7): 12763 UI - 4181 AU - Vilalta R AU - Stepinski T AU - Achari M AU - Ocegueda-Hernandez F AD - Univ Houston, Dept Comp Sci, Houston, TX 77204, USALunar & Planetary Inst, Houston, TX 77058, USACINVESTAV, Guadalajara 45090, Jalisco, MexicoVilalta, R, Univ Houston, Dept Comp Sci, 4800 Calhoun Rd, Houston, TX 77204 USA TI - A quantification of cluster novelty with an application to Martian topography AB - Automated tools for knowledge discovery are frequently invoked in databases where objects already group into some known classification scheme. In the context of unsupervised learning or clustering, such tools delve inside large databases looking for alternative classification schemes that are both meaningful and novel. A quantification of cluster novelty can be looked upon as the degree of separation between each new cluster and its most similar class. Our approach models each cluster and class as a Gaussian distribution and estimates the degree of overlap between both distributions by measuring their intersecting area. Unlike other metrics, our method quantifies the novelty of each cluster individually, and enables us to rank classes according to its similarity to each new cluster. We test our algorithm on Martian landscapes using a set of known classes called geological units; experimental results show a new interpretation for the characterization of Martian landscapes MH - USA MH - Mexico|Jalisco PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224109600040 SO - Knowledge Discovery in Databases: Pkdd 2004, Proceedings 2004 ;3202():434-445 12764 UI - 3922 AU - Vilches S AU - Urgell C AU - Merino S AU - Chacon MR AU - Soler L AU - Castro-Escarpulli G AU - Figueras MJ AU - Tomas JM AD - Univ Barcelona, Fac Biol, Dept Microbiol, E-08071 Barcelona, SpainUniv Rovira & Virgili, Fac Med & Ciencies Salut, Dept Ciencies Med Basiques, Reus, SpainInst Politecn Nacl, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City, DF, MexicoTomas, JM, Univ Barcelona, Fac Biol, Dept Microbiol, Diagonal 645, E-08071 Barcelona, Spain TI - Complete type III secretion system of a mesophilic Aeromonas hydrophila strain AB - We have investigated the existence and genetic organization of a functional type III secretion system (TTSS) in a mesophilic Aeromonas strain by initially using the Aeromonas hydrophila strain AH-3. We report for the first time the complete TTSS DNA sequence of an Aeromonas strain that comprises 35 genes organized in a similar disposition as that in Pseudomonas aeruginosa. Using several gene probes, we also determined the presence of a TTSS in clinical or environmental strains of different Aeromonas species: A. hydrophila, A. veronii, and A. caviae. By using one of the TTSS genes (ascV), we were able to obtain a defined insertion mutant in strain AH-3 (AH-3AscV), which showed reduced toxicity and virulence in comparison with the wild-type strain. Complementation of the mutant strain with a plasmid vector carrying ascV was fully able to restore the wild-type toxicity and virulence MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0099-2240 UR - ISI:000225076100073 L2 - SALMONICIDA SUBSP SALMONICIDA; GENUS AEROMONAS; O-ANTIGEN; VIRULENCE; CLONING; GENES; LIPOPOLYSACCHARIDE; BIOSYNTHESIS; TOXIN; FISH SO - Applied and Environmental Microbiology 2004 ;70(11):6914-6919 12765 UI - 3553 AU - Vilchis L AU - Guyot A AU - Rios L AU - Villalobos MA AD - UNAM, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, MexicoCID Ctr Invest & Desarrollo Tecnol SA CV, Mexico City 52000, DF, MexicoCPE, CNRS, Lab Chim & Procedes Polymerisat, LCPP, F-69100 Villeurbanne, FranceSC Johnson Polymers, Racine, WI 53403, USAGuyot, A, UNAM, Fac Quim, Dept Ingn Quim, Circuito Escolar,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Co-polymers of acrylic acid and methyl methacrylate as stabilizers for suspension polymerization of styrene AB - The synthesis of homo-polymers of acrylic acid and co-polymers of acrylic acid-methyl methacrylate as suspension agents (SA) was performed in aqueous media. and SA were used as stabilizer in the suspension polymerization of styrene. The behavior of water solutions in the interfacial tension of SA against styrene was studied. The composition of the co-polymers and their molecular weights are related to the Zykonski model coefficients and to the molecular configuration of the stabilizer at the interface. It was found that the molecular weight. the composition of SA. the concentration used in the reaction system and the time at which it was added had a marked effect on the stability of the suspension during the reaction and on the final particle size distribution of the polystyrene beads. The hoi-no-polymers of acrylic acid do not prevent correctly the coalescence during the suspension polymerization. while the co-polymers of acrylic acid and methyl methacrylate are well adsorbed into the oil/water interface and then work as good stabilizers for styrene suspension polymerizations. Provided a good stabilizer was used. i.e., with a high molecular weight and enough hydrophobic character. its addition delayed up to the beginning of the sticky stage produced a quite narrow particle size distribution MH - France MH - Mexico|Distrito Federal MH - USA PB - ZEIST: VSP BV RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 1385-772X UR - ISI:000226172300005 L2 - styrene suspension polymerization;acrylic acid co-polymer;suspending agent;particle size distribution;FLOW SO - Designed Monomers and Polymers 2004 ;7(6):521-539 12766 UI - 4868 AU - viles-Jimenez F AU - Letley DP AU - Gonzalez-Valencia G AU - Salama N AU - Torres J AU - Atherton JC AD - Univ Nottingham Hosp, Wolfson Digest Dis Ctr, Nottingham NG7 2UH, EnglandUniv Nottingham Hosp, Inst Infect Immun & Inflammat, Nottingham NG7 2UH, EnglandIMSS, Mexico City, DF, MexicoFred Hutchinson Canc Res Ctr, Human Biol Div, Seattle, WA 98104, USAAtherton, JC, Univ Nottingham Hosp, Wolfson Digest Dis Ctr, Nottingham NG7 2UH, England TI - Evolution of the Helicobacter pylori vacuolating cytotoxin in a human stomach AB - We describe two subclones of Helicobacter pylori, isolated contemporaneously from a human stomach, which differ markedly in the vacuolating cytotoxin gene, vacA, but whose near identity in sequences outside this locus implies a very recent common origin. The differences are consistent with homologous recombination with DNA from another strain and result in a changed vacA midregion and, importantly, in changed toxicity MH - United Kingdom MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000222876700046 L2 - CAMPYLOBACTER-PYLORI; CAGA GENOTYPES; SOUTH-AFRICA; VACA; DIVERSITY; RECOMBINATION; COLONIZATION; STRAINS; HETEROGENEITY; ASSOCIATION SO - Journal of Bacteriology 2004 ;186(15):5182-5185 12767 UI - 3407 AU - Vilialobos M AU - Toner B AU - Manceau A AU - Sposito G AD - Natl Autonomous Univ Mexico, LAFQA, Inst Geografia, Environm Biogeochem Grp, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Div Ecosyst Sci, Berkeley, CA 94720, USAUniv Grenoble, CNRS, Environm Geochem Grp, Grenoble, France TI - EXAFS structural characterization of the biogenic mn oxide produced by Pseudomonas putida MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655603992 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U1212-U1212 12768 UI - 5994 AU - Villa M AU - Bounaim L AU - Smeyers N AU - Senent ML AU - Ezamarty A AU - Smeyers YG AD - CSIC, Inst Estruct Mat, E-28006 Madrid, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Ain Chock, Dept Chim, Casablanca, MoroccoVilla, M, CSIC, Inst Estruct Mat, C Serrano 113 Bis, E-28006 Madrid, Spain TI - Ab initio structural study of some substituted ibuprofen derivatives as possible anti-inflammatory agents AB - The formation energies of a series of substituted derivatives in aposition of ibuprofen (2-p-isobutyl-phenyl-propionic acid) are determined, at the ab initio level RHF/6-311G** with full geometry optimization, in their neutral and anionic forms and in the gas phase and water solution to correlate their physical-chemical properties with their anti-inflammatory activity. Conformational calculations on the acidic moiety were also performed on five of them. The ab initio methods foresee that all these molecules present two preferred conformations in which the substituting atom in a-position is lying approximately in the aromatic ring plane, in contrast with the results obtained with semiempirical methods. In this article, the protonation energy in solution, the solvation energy, the HOMO energy of the neutral form, and the lipophilicity will be considered as possible factors of anti-inflammatory activity. The protonation energy in solution, together with the lipophilicity, are verified to be good activity factors: The smaller the protonation energy and the lipophilicity, the larger the anti-inflammatory activity. In contrast, the larger the solvation energy, the smaller the activity. (C) 2003 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Morocco MH - Spain PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000220177100007 L2 - anti-inflammatory agent;ibuprofen;rotational barrier;ACIDS SO - International Journal of Quantum Chemistry 2004 ;97(4):883-888 12769 UI - 4475 AU - Villa RM AU - Martsinkovsky A AD - Northeastern Univ, Dept Math, Boston, MA 02115, USAUNAM, Inst Math, Morelia 58089, Michoacan, MexicoMartsinkovsky, A, Northeastern Univ, Dept Math, Boston, MA 02115, USA TI - Cohomology of tails, Tate-Vogel cohomology, and noncommutative Serre duality over Koszul quiver algebras AB - The main result of the paper shows that, under Koszul duality between quiver algebras, cohomology of tails is identified with graded Vogel cohomology. As an application, a new proof of the noncommutative Serre duality over generalized Artin-Schelter regular Koszul quiver algebras is given. It is deduced from a similar formula over an arbitrary (i.e., not necessarily Koszul) Frobenius algebra, which turns out to be equivalent to the Auslander-Reiten formula. As another application, it is shown that, over a generalized Artin-Schelter regular Koszul quiver algebra, any algebra automorphism appearing in the noncommutative Serre duality formula is closely related, under Koszul duality, to the Nakayama automorphism of the Koszul-dual algebra. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Michoacan MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000223753900004 L2 - tail cohomology;Vogel cohomology;Tate cohomology;Koszul algebra;Serre duality;generalized Artin-Schelter regular algebra;Frobenius algebra;Nakayama automorphism;Auslander-Reiten formula SO - Journal of Algebra 2004 ;280(1):58-83 12770 UI - 5817 AU - Villa RM AU - Saorin M AD - UNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoUniv Murcia, Dept Matemat, E-30100 Murcia, SpainVilla, RM, UNAM, Inst Matemat, AP 61-3, Morelia 58089, Michoacan, Mexico TI - Koszul equivalences and dualities AB - For every positively graded algebra A, we show that its categories of linear complexes of projectives and almost injectives (see definition below) are both naturally equivalent to the category of graded modules over the quadratic dual algebra A(!). In case A = Lambda is a graded factor of a path algebra with Yoneda algebra Gamma, we show that the category Lc(Gamma) of linear complexes of finitely generated right projectives over G is dual to the category of locally finite graded left modules over the quadratic algebra (&ULambda;) over tilde associated to Lambda. When Lambda is Koszul and Gamma is graded right coherent, we also prove that the suspended category (gr) over bar (Lambda) has a ( triangulated) stabilization S((gr) over bar (Lambda)) which is triangle-equivalent to the bounded derived category of the 'category of tails' fpgr(Gamma)/L-Gamma MH - Mexico|Michoacan MH - Spain PB - BERKELEY: PACIFIC JOURNAL MATHEMATICS RP - NOT IN FILE U3 - TC 2 U4 - Mathematics U5 - J;Article AV - English IS - 0030-8730 UR - ISI:000220566200009 L2 - CONTRAVARIANTLY FINITE SUBCATEGORIES; TRIANGULATED CATEGORIES; ALGEBRAS SO - Pacific Journal of Mathematics 2004 ;214(2):359-378 12771 UI - 5125 AU - Villafuerte-Castrejon ME AU - Castillo-Pereyra E AU - Tartaj J AU - Fuentes L AU - Bueno-Baques D AU - Gonzalez G AU - Matutes-Aquino JA AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCSIC, Inst Ceram & Vidrio, Dept Electroceram, E-28049 Madrid, SpainCtr Invest Mat Avanzados, Chihuahua, MexicoVillafuerte-Castrejon, ME, Univ Nacl Autonoma Mexico, Inst Invest Mat, Ciudad Univ,A-P 70-360, Mexico City 04510, DF, Mexico TI - Synthesis and AC magnetic susceptibility measurements of Fe(2-x)AlxO3 compounds AB - FeAlO3 have orthorhombic unit cell and Pna2(1) space group. It is ferrimagnetic, magnetoelectric, and piezoelectric with strong magnetic anisotropy. Conventional ceramic and oxalic precursors routes require high temperatures and second phases appear in the final product. We prepared a nonstoichiometric serie by precipitation of an aqueous solution containing the precursor salts at lower temperature. X-ray diffraction, densities and AC susceptibility were measured. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000222236700037 L2 - aluminum iron oxide;solid solution;ferrimagnetism;magnetoelectricity;piezoelectricity;coprecipitation;IRON-OXIDE; CRYSTAL; FEALO3 SO - Journal of Magnetism and Magnetic Materials 2004 ;272-76():837-839 12772 UI - 4205 AU - Villalobos-Arias M AU - Coello CAC AU - Hernandez-Lerma O AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, MexicoIPN, CINVESTAV, Dept Ingn Electr, Secc Computac,Evolutionary Computat Grp, Mexico City 07300, DF, MexicoUniv Costa Rica, Escuela Matemat, San Jose, Costa RicaVillalobos-Arias, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, A Postal 14-740, Mexico City 07000, DF, Mexico TI - Convergence analysis of a multiobjective artificial immune system algorithm AB - This paper presents a mathematical proof of convergence of a multi-objective artificial immune system algorithm (based on clonal selection theory). An specific algorithm (previously reported in the specialized literature) is adopted as a basis for the mathematical model presented herein. The proof is based on the use of Markov chains MH - Costa Rica MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 5 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000224093300019 L2 - CLONAL SELECTION PRINCIPLE SO - Artificial Immune Systems, Proceedings 2004 ;3239():226-235 12773 UI - 3410 AU - Villalobos M AU - Sposito G AU - Bargar JR AD - Natl Autonomous Univ Mexico, LAFQA, Inst Geog, Environm Bio Geochem Grp, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Berkeley, CA 94720, USAStanford Synchrotron Radiat Lab, Stanford, CA 94309, USA TI - Pb(II) reactivity on a biogenic Mn oxide: Evidence of inner-sphere bonding at internal and external sites MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655604021 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U1217-U1217 12774 UI - 5494 AU - Villalobos MA AU - Bartels D AU - Iturriaga G AD - UAEM, Ctr Invest Biotecnol, Cuernavaca 62210, Morelos, MexicoUNAM, Inst Biotecnol, Cuernavaca 62210, Morelos, MexicoInst Physiol & Biotechnol Plants, D-53115 Bonn, GermanyIturriaga, G, UAEM, Ctr Invest Biotecnol, Cuernavaca 62210, Morelos, Mexico TI - Stress tolerance and glucose insensitive phenotypes in Arabidopsis overexpressing the CpMYB10 transcription factor gene AB - The resurrection plant Cratcrostigma plantagineum has the ability to survive complete dehydration. In an attempt to further understand desiccation tolerance in this plant, the CpMYB10 transcription factor gene was functionally characterized. CpMYB10 is rapidly induced by dehydration and abscisic acid (ABA) treatments in leaves and roots, but no expression was detected in fully hydrated tissues. Electrophoretic mobility shift assay experiments showed binding of rCpMYB10 to specific mybRE elements within the LEA Cp11-24 and CpMYB10 promoters. Localization of CpMYB10 transcript by in situ reverse transcription-PCR reactions showed expression in vascular tissues, parenchyma, and epidermis both in leaves and roots in response to ABA. Transgenic Arabidopsis plants transformed with CpMYB10 promoter fused to GUS gene showed reporter expression under ABA and stress conditions hi several organs. Overexpression of CpMYB10 cDNA in Arabidopsis led to desiccation and salt tolerance of transgenics lines. Interestingly, it was found that plants overexpressing CpMYB10 exhibited Glc-insensitive and ABA hypersensitive phenotypes. Therefore, our results indicate that CpMYB10 in Arabidopsis is mediating stress tolerance and altering ABA and Glc signaling responses MH - Germany MH - Mexico|Morelos PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 18 U4 - Plant Sciences U5 - J;Article AV - English IS - 0032-0889 UR - ISI:000221420800033 L2 - PLANT CRATEROSTIGMA-PLANTAGINEUM; LEUCINE ZIPPER PROTEINS; ELEMENT-BINDING FACTORS; ABSCISIC-ACID; LOW-TEMPERATURE; DEHYDRATION STRESS; DIFFERENTIAL EXPRESSION; DESICCATION TOLERANCE; SIGNAL-TRANSDUCTION; RAPID ACCUMULATION SO - Plant Physiology 2004 ;135(1):309-324 12775 UI - 6346 AU - Villalon CM AU - Centurion D AU - Willems EW AU - Arulmani U AU - Saxena PR AU - Valdivia LF AD - IPN, CINVESTAV, Dept Farmacobiol, Mexico City 14330, DF, MexicoErasmus Med Ctr Rotterdam, Inst Cardiovasc Res, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsVillalon, CM, IPN, CINVESTAV, Dept Farmacobiol, Czda Tenrios 235,Col Granjas Coapa deleg, Mexico City 14330, DF, Mexico TI - 5-HT1B receptors and alpha(2A/2C)-adrenoceptors mediate external carotid vasoconstriction to dihydroergotamine AB - Dihydroergotamine produces external carotid vasoconstriction in vagosympathectornized dogs by 5-HT1B/1D receptors and alpha(2)-adrenoceptors. This study identified the specific subtypes involved in this response. One-minute intracarotid infusions of dihydroergotamine (5.6-10 mug/min) dose-dependently decreased external carotid blood flow without affecting blood pressure or heart rate. This response was: (1) partly blocked in dogs pretreated intravenously with the antagonists SB224289 (5-HT1B; 2,3,6,7-tetrahydro-1'-methyl-5-[2'-methyl-4' (5-methyl-1,2,4-oxadiazol-3-yl)biphenyl-4-carbonyl]furo[2,3-flindole-3-s piro-4'-piperidine hydrochloride), rauwolscine (alpha(2)), BRL44408 (alpha(2A); 2-[2H-(1-methyl-1,3-dihydroisoindole)methyl]-4,5-dihydroimidazole) or MK912 (alpha(2C); (2S,12bS)-1'3'-dimethylspiro(1,3,4,5',6,6',7,12b-octahydro-2Hbenzo[b]fur o[2,3-alquinazoline)-2,4'-pyrimidin-2'-one); (2) markedly blocked after SB224289 plus rauwolscine; and (3) unaffected after BRL15572 (5-HT1D; 1-(3-chlorophenyl)-4-[3,3-diphenyl (2-(S,R) hydroxypropanyl) piperazine] hydrochloride) or imiloxan (alpha(2B)). Therefore, the above response involves 5-HT1B receptors and alpha(2A/2C)-adrenoceptors. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Netherlands PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0014-2999 UR - ISI:000188610800021 L2 - BRL44408;dihydroergotamine;(dog);carotid vasoconstriction external;MK912;SB224289;ERGOTAMINE; MIGRAINE; SUBTYPES; PHARMACOLOGY; THERAPY SO - European Journal of Pharmacology 2004 ;484(2-3):287-290 12776 UI - 5077 AU - Villalpando S AU - Perez-Exposito AB AU - Rivera J AU - Abrams S AD - Inst Nacl Salud Publ, Ctr Nutr & Hlth Res, Cuernavaca 62508, Morelos, MexicoBaylor Coll Med, CNRC, Houston, TX 77030, USA TI - Comparative bioavailability of ferrous sulfate, ferrous tumarate and reduced iron plus Na2EDTA, in a baby food supplement distributed by the PROGRESA Program in Mexico MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602526 SO - Faseb Journal 2004 ;18(4):A525-A525 12777 UI - 6465 AU - Villanueva-Fierro I AU - Popp CJ AU - Martin RS AD - IPN, CIIDIR, Dept Proc Quim, Unidad Durango, Durango 34220, Dgo, MexicoNew Mexico Inst Min & Technol, Dept Chem, Socorro, NM 87801, USAUtah State Univ, Dept Civil & Environm Engn, Logan, UT 84322, USAVillanueva-Fierro, I, IPN, CIIDIR, Dept Proc Quim, Unidad Durango, Sigma S-N,Frac 20 Noviembre 2, Durango 34220, Dgo, Mexico TI - Biogenic emissions and ambient concentrations of hydrocarbons, carbonyl compounds and organic acids from ponderosa pine and cottonwood trees at rural and forested sites in Central New Mexico AB - Direct emission rates of carbonyl compounds, carboxylic acids and hydrocarbons from Populus fremontil (cottonwood) and Pinus ponderosa (ponderosa pine) trees were studied during the summer of 1997. Ambient air concentrations of these compounds in the vicinity of the sampled trees were also identified and quantified. Study sites were Socorro, NM and Langmuir Laboratory, NM a rural and forested, high mountain site, respectively, located in Central New Mexico. A dynamic branch enclosure method was used to perform the sampling of tree emissions, that are given at standard atmospheric temperature of 303 K, and 1000 mumol m(-2) s(-1) PAR. Average emission rates of acetic and formic acid, respectively, from cottonwood were 470 +/- 540 and 310 +/- 300 ng g(-1) h(-1) and from ponderosa pine were 170 +/- 180 and 210 +/- 210 ng g(-1) h(-1). Formaldehyde and acetaldehyde average emission rates, respectively, from ponderosa pine were 500 +/- 400 and 250 +/- 190 ng g(-1) h(-1), and from cottonwood were 4070 +/- 3570 and 1190 +/- 1360 ng g(-1) h(-1). Cottonwood had an average isoprene emission rate of 9050 +/- 10700 ng g(-1) h(-1), while ponderosa pine had emission rates of alpha-pinene and beta-pinene of 450 +/- 1100 and 520 +/- 1050 ng g(-1) h(-1), respectively. Total mass emissions of carbon compounds measured from cottonwood were four times larger than from ponderosa pine. Seasonal, diurnal, and temperature dependence of concentrations in ambient air and emission rates from trees are also discussed. Average ambient air concentrations of acetic and formic acid, respectively, were 2.7 +/- 3.8 and 0.7 +/- 0.9 ppbv for the rural site, and 1.7 +/- 2.0 and 0.6 +/- 0.5 ppbv for the mountain site. The average range of carbonyl compound concentrations in ambient air was from 0.3 to 3.4 ppbv for various carbonyl compounds with about 60% of the ambient carbonyls consisting of formaldehyde, acetaldehyde and acetone. Isoprene and monoterpene concentrations in ambient air were usually below the detection limit. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Durango MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 15 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1352-2310 UR - ISI:000188210700008 L2 - acetic acid;formic acid;aldehydes;isoprene;monoterpenes;MONOTERPENE EMISSION; ACETIC-ACIDS; OXYGENATED HYDROCARBONS; LIQUID-CHROMATOGRAPHY; PEROXYACETYL NITRATE; CARBOXYLIC-ACIDS; RATE VARIABILITY; VOC EMISSIONS; UNITED-STATES; AIR SO - Atmospheric Environment 2004 ;38(2):249-260 12778 UI - 5059 AU - Villanueva C AU - Sanchez-Gonzalez J AU - Moro MA AU - Hernandez-Pando R AU - Castillo-Henkel C AU - Mendoza R AU - Herrera-Gonzalez N AD - IPN, Escuela Super Med, Mexico City 07738, DF, MexicoUniv Complutense Madrid, Fac Med, E-28040 Madrid, SpainInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, Mexico TI - Immunohistochemistry of nitric oxide synthases in lungs of rats exposed to ozone MH - Mexico|Distrito Federal MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0891-5849 UR - ISI:000221320200200 SO - Free Radical Biology and Medicine 2004 ;36():S79-S79 12779 UI - 3976 AU - Villanueva R AU - Roubik DW AD - Smithsonian Trop Res Inst, Unit 0948, APO, AA 34002, USAEl Colegio Frontera Sur, Chetumal, Quintana Roo, MexicoRoubik, DW, Smithsonian Trop Res Inst, Unit 0948, APO, AA 34002, USA TI - Why are African honey bees and not European bees invasive? Pollen diet diversity in community experiments AB - We studied resource use and competition by varieties of a honey bee, Apis mellifera, through re-introducing European A. m. ligustica in experimental apiaries in a habitat 'saturated' by African ( or hybrid African and European) honey bees that naturally colonized forest in the Yucatan Peninsula of Mexico. Over 171 pollen species comprised honey bee diets. The Morisita-Horn similarity index ( highest similarity = 1.0) between the two honey bee races was 0.76 for pollen use and, from the average daily volume usage by colonies of each bee subspecies, 0.55 for taxon-specific intensity of use. Although using more plant species, the European bee specialized much more heavily on a few plants than did African honey bees. By re- analysis of pollen pellets collected by locally-adapted ( Mexican) European honey bees for one year, at the same experimental sites and using the same pollen traps as our studies, before the arrival of invasive honey bees in S. Mexico, we infer that resident bees may respond to exotic honey bee competition by shifting flower choice and by increasing resource specialization. We also show that replicated, quantitative pollen analysis is a powerful tool that may be applied to understanding diet diversity of bees MH - Mexico|Quintana Roo MH - USA PB - LES ULIS CEDEX A: E D P SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0044-8435 UR - ISI:000224957200004 L2 - Apis mellifera;niche use;diet diversity;pollen;invasive species;competition;APIS-MELLIFERA L.; YUCATAN PENINSULA; STINGLESS BEES; TASK-PERFORMANCE; RAIN-FOREST; MEXICO; COMPETITION; ECOLOGY; TIME SO - Apidologie 2004 ;35(5):481-491 12780 UI - 5940 AU - Villasenor-Pineda L AU - Gomez M AU - Caelen J AD - INAOE, Mexico City, DF, Mexico. Univ Grenoble 1, Lab CLIPS IMAG, F-38041 Grenoble, France TI - A modal logic framework for human-computer spoken interaction AB - One major goal of human computer interfaces is to simplify the communication task. Traditionally, users have been restricted to the language of computers for this task. With the emerging of the graphical and multimodal interfaces the effort required for working with a computer is decreasing. However, the problem of communication is still present, and users continue caring about the communication task when they deal with a computer. Our work focuses on improving the communication between the human and the computer. This paper presents the foundations of a multimodal dialog model based on a modal logic, which integrates the speech and the action under the same framework MH - France MH - Mexico|Puebla T3 - COMPUTATIONAL LINGUISTICS AND INTELLIGENT TEXT PROCESSINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlevillasen@inaoep.mx mmontesg@inaoep.mx jean.caelan@imag.fr0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBY59Y AV - English IS - 0302-9743 UR - ISI:000189417900006 L2 - human computer spoken interaction;speech acts;multimodal interaction;modal logic SO - 2004 ;():46-55 12781 UI - 5224 AU - Villasenor AB AU - Oloriz F AU - Lopez-Palomino I AD - Univ Nacl Autonoma Mexico, Dept Paleontol, Inst Geol, Mexico City 04510, DF, MexicoUniv Granada, Fac Ciencias, Dept Estratig & Paleontol, Granada, SpainVillasenor, AB, Univ Nacl Autonoma Mexico, Dept Paleontol, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Inner whorls of Gregoryceras (Ammonitina, Peltoceratinae) as the first occurrence of the genus in Mexico AB - Two nuclei of Gregoryceras are described as the first record of the genus in Mexico. The occurrence in Mexico of the ubiquitous Tethyan genus Gregoryceras is interpreted as related to a major flooding episode that affected neritic shelves in the southern North-American plate MH - Mexico|Distrito Federal MH - Spain PB - MILANO: UNIV STUDI MILANO RP - NOT IN FILE U3 - TC 2 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0035-6883 UR - ISI:000222056600027 L2 - ammonites;Gregoryceras;Upper Jurassic;Oxfordian;Mexico;BASIN; NORTH; GULF SO - Rivista Italiana di Paleontologia e Stratigrafia 2004 ;110(1):249-254 12782 UI - 4890 AU - Villata M AU - Raiteri CM AU - Kurtanidze OM AU - Nikolashvili MG AU - Ibrahimov MA AU - Papadakis IE AU - Tosti G AU - Hroch F AU - Takalo LO AU - Sillanpaa A AU - Hagen-Thorn VA AU - Larionov VM AU - Schwartz RD AU - Basler J AU - Brown LE AU - Balonek TJ AU - Benitez E AU - Ramirez A AU - Sadun AC AU - Boltwood P AU - Carini MT AU - Barnaby D AU - Coloma JM AU - Ros JA AU - Dai BZ AU - Xie GZ AU - Mattox JR AU - Rodriguez D AU - Asfandiyarov IM AU - Atkerson A AU - Bloom SD AU - Chanturiya SM AU - Ciprini S AU - Crapanzano S AU - de Diego JA AU - Efimova NV AU - Gardiol D AU - Guerra JC AU - Kahharov BB AU - Kapanadze BZ AU - Karttunen H AU - Kato T AU - Kimeridze GN AU - Kudryavtseva NA AU - Lainela M AU - Lanteri L AU - Larionova EG AU - Maesano M AU - Marchili N AU - Massone G AU - Monroe T AU - Montagni F AU - Nesci R AU - Nilsson K AU - Noble JC AU - Nucciarelli G AU - Ostorero L AU - Papamastorakis J AU - Pasanen M AU - Peters CS AU - Pursimo T AU - Reig P AU - Ryle W AU - Sclavi S AU - Sigua LA AU - Uemura M AU - Wills W AD - Osserv Astron Torino, INAF, I-10025 Pino Torinese, ItalyAbastumani Astrophys Observ, GE-383762 Abastumani, Rep of GeorgiaAstrophys Inst Potsdam, D-14482 Potsdam, GermanyLandessternwarte Heidelberg Konigstuhl, D-69117 Heidelberg, GermanyAcad Sci Uzbek, Ulugh Beg Astron Inst, Tashkent 700052, UzbekistanFORTH, IESL, Iraklion 71110, Crete, GreeceUniv Crete, Dept Phys, Iraklion 71003, Crete, GreeceUniv Perugia, Dipartimento Fis, I-06123 Perugia, ItalyMasaryk Univ, Fac Sci, Inst Theoret Phys & Astrophys, CS-61137 Brno, Czech RepublicTuorla Observ, Piikkio 21500, FinlandSt Petersburg State Univ, Astron Inst, St Petersburg 198504, RussiaIsaac Newton Inst Chile, St Petersburg, RussiaUniv Missouri, Dept Phys & Astron, St Louis, MO 63121, USAConnecticut Coll, Dept Phys Astron & Geophys, New London, CT 06320, USAColgate Univ, Foggy Bottom Observ, Hamilton, NY 13346, USAUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Colorado, Dept Phys, Denver, CO 80217, USABoltwood Observ, Stittsville, ON K2S 1N6, CanadaWestern Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42104, USAAgrupacio Astron Sabadell, Sabadell 08200, SpainChinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R ChinaChinese Acad Sci, United Lab Opt Astron, Beijing, Peoples R ChinaYunnan Univ, Yunnan Astrophys Ctr, Kunming 650091, Peoples R ChinaFayetteville State Univ, Dept Nat Sci, Fayetteville, NC 28301, USAGuadarrama Observ, Madrid 28409, SpainHampden Sydney Coll, Dept Phys & Astron, Hampden Sydney, VA 23943, USARoque Muchachos Astron Observ, INAF, Santa Cruz De La Palma 38700, TF, SpainKyoto Univ, Fac Sci, Dept Astron, Kyoto, JapanStn Astron Vallinfreda, Vallinfreda, ItalyStn Astron Greve, Chianti, ItalyUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, ItalyBoston Univ, Inst Astrophys Res, Boston, MA 02215, USAUniv Turin, Dipartimento Fis Gen, I-10125 Turin, ItalyRoque Muchachos Astron Observ, Santa Cruz De La Palma 38700, TF, SpainUniv Valencia, GACE, Dept Astron & Astrofis, Valencia 46071, SpainVillata, M, Osserv Astron Torino, INAF, Via Osservatorio 20, I-10025 Pino Torinese, Italy TI - The WEBT BL Lacertae Campaign 2001 and its extension - Optical light curves and colour analysis 1994-2002 AB - BL Lacertae has been the target of four observing campaigns by the Whole Earth Blazar Telescope (WEBT) collaboration. In this paper we present UBVRI light curves obtained by the WEBT from 1994 to 2002, including the last, extended BL Lac 2001 campaign. A total of about 7500 optical observations performed by 31 telescopes from Japan to Mexico have been collected, to be added to the similar to 15 600 observations of the BL Lac Campaign 2000. All these data allow one to follow the source optical emission behaviour with unprecedented detail. The analysis of the colour indices reveals that the flux variability can be interpreted in terms of two components: longer-term variations occurring on a few-day time scale appear as mildly-chromatic events, while a strong bluer-when-brighter chromatism characterizes very fast (intraday) flares. By decoupling the two components, we quantify the degree of chromatism inferring that longer-term flux changes imply moving along a similar to0.1 bluer-when-brighter slope in the B-R versus R plane; a steeper slope of similar to0.4 would distinguish the shorter-term variations. This means that, when considering the long-term trend, the B-band flux level is related to the R-band one according to a power law of index similar to1.1. Doppler factor variations on a "convex" spectrum could be the mechanism accounting for both the long-term variations and their slight chromatism MH - Canada MH - Czech Republic MH - Finland MH - Germany MH - Greece MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Peoples R China MH - Rep of Georgia MH - Russia MH - Spain MH - USA MH - Uzbekistan PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 24 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000222847800016 L2 - galaxies : active;galaxies : BL Lacertae objects : general;galaxies : jets;galaxies : quasars : general;MICROVARIABILITY OBSERVATIONS; VARIABILITY; OUTBURST; OBJECTS; PERIODICITY; GALAXIES; MODELS SO - Astronomy & Astrophysics 2004 ;421(1):103-114 12783 UI - 5421 AU - vina-Cervantes JG AU - Devy M AD - Lab Anal & Architecture Syst, F-31077 Toulouse 4, France. Univ Guanajuato, Fac Ingn Mecan Elect & Electron, Guanajuato, Mexico TI - Scene Modeling by ICA and color segmentation AB - In this paper, a method is proposed for the interpretation of outdoor natural images. It fastly constructs a basic 2-D scene model that can be used in the visual systems onboard of autonomous vehicles. It is composed of several processes: color image segmentation, principal areas detection, classification and verification of the final model. The regions provided by the segmentation phase are characterized by their color and texture. These features are compared and classified into predefined classes using the Support Vector Machines (SVM) algorithm. An Independent Component Analysis (ICA) is used to reduce redundancy from the database and improve the recognition stage. Finally, a global scene model is obtained by merging the small regions belonging to the same class. The extraction of useful entities for navigation (like roads) from the final model is straightforward. This system has been intensively tested through experiments on sequences of countryside scenes color images MH - France MH - Mexico|Guanajuato T3 - MICAI 2004: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlegavina@laas.fr michel@laas.fr1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBAB91 AV - English IS - 0302-9743 UR - ISI:000221506600059 SO - 2004 ;():574-583 12784 UI - 3975 AU - Violante-Carvalho N AU - Ocampo-Torres FJ AU - Robinson IS AD - CICESE, Dept Oceanog Fis, Ensenada, Baja California, MexicoViolante-Carvalho, N, Univ Southampton, Southampton Oceanog Ctr, European Way, Southampton SO14 3ZH, Hants, England TI - Buoy observations of the influence of swell on wind waves in the open ocean AB - The influence of longer (swell) on shorter, wind sea waves is examined using an extensive database of directional buoy measurements obtained from a heave-pitch-roll buoy moored in deep water in the South Atlantic. This data set is unique for such an investigation due to the ubiquitous presence of a young swell component propagating closely in direction and frequency with the wind sea, as well as a longer, opposing swell. Our results show, within the statistical limits of the regressions obtained from our analysis when compared to measurements in swell free environments, that there is no obvious influence of swell on wind sea growth. For operational purposes in ocean engineering this means that power-laws from fetch limited situations describing the wind sea growth can be applied in more realistic situations in the open sea when swell is present. (C) 2004 Elsevier Ltd. All rights reserved MH - United Kingdom MH - Mexico|Baja California PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Ocean;Oceanography U5 - J;Article AV - English IS - 0141-1187 UR - ISI:000224936200005 L2 - wind sea growth;high frequency spectrum;equilibrium range;campos basin;directional buoy data;GENERATED WAVES; EQUILIBRIUM RANGE; GRAVITY-WAVES; SPECTRA; GROWTH; SLOPE; WATER SO - Applied Ocean Research 2004 ;26(1-2):49-60 12785 UI - 5903 AU - Virgen A AU - Peraza AL AU - Stefani E AU - Toro L AU - Muniz J AD - Univ Colima, Ctr Univ Invest Biomed, Colima, MexicoUniv Calif Los Angeles, Dept Anesthesiol, Div Mol Med, David Geffen Sch Med, Los Angeles, CA 90024, USA TI - Changes in cardiac tissue stiffness associated to functional hypertrophy during pregnancy MH - Mexico|Colima MH - USA PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000187971201987 SO - Biophysical Journal 2004 ;86(1):385A-385A 12786 UI - 5951 AU - Vit P AU - Medina M AU - Enriquez ME AD - Univ Los Andes, Fac Farm & Bioanal, Dept Ciencia Alimentos, APIVA, Merida, VenezuelaAIPROCOPA, Mexico City 16700, DF, MexicoUniv San Carlos, Fac Chem Sci & Pharm, LENAP, Guatemala City, GuatemalaVit, P, Univ Los Andes, Fac Farm & Bioanal, Dept Ciencia Alimentos, APIVA, Merida, Venezuela TI - Quality standards for medicinal uses of Meliponinae honey in Guatemala, Mexico and Venezuela AB - Beekeeping with stingless bees (meliponiculture) is practiced in Guatemala, Mexico and Venezuela. In this article we review the medicinal uses of stingless bee honeys in these countries. We include honeys from 23 stingless bee species, review their use in the treatment of ocular cataracts and pterygium, fatigue, gastritis, ulcers, lung weakness, coughs, wounds and bruises; their use as laxatives and fertility enhancers, and their nutritional value. A proposal on quality standards for stingless bee honey is considered a contribution for further regulations MH - Guatemala MH - Mexico|Distrito Federal MH - Venezuela PB - CARDIFF: INT BEE RESEARCH ASSOC RP - NOT IN FILE U3 - TC 5 U4 - Entomology U5 - J;Article AV - English IS - 0005-772X UR - ISI:000220305800002 L2 - STINGLESS BEES APIDAE SO - Bee World 2004 ;85(1):2-5 12787 UI - 2823 AU - Vital-Reyes V AU - Rodriguez-Burford C AU - Oelschlager DK AU - Suarez-Cuervo C AU - Manne U AU - Grizzle WE AD - Inst Mexicano Seguro Social, Mexico City, DF, MexicoUniv Alabama, Birmingham, AL, USA TI - The COX-2 inhibitor, celecoxib, inhibits differentially the cellular growth of ovarian, prostate and colon carcinoma cell lines independent of p53 status MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: AMER ASSOC CANCER RESEARCH RP - NOT IN FILE U3 - TC 0 U4 - Oncology;Public, Environmental & Occupational Health U5 - J;Meeting Abstract AV - English IS - 1055-9965 UR - ISI:000225073100210 SO - Cancer Epidemiology Biomarkers & Prevention 2004 ;13(11):1885S-1885S 12788 UI - 3595 AU - Vital-Reyes V AU - Tellez-Velasco S AU - Chhieng D AU - Grizzle W AU - Reyes-Fuentes A AD - Univ Alabama, Dept Pathol, Immunohistochem Lab, Birmingham, AL 35249, USAInst Mexicano Seguro Social, Hosp Ginecol & Obstet 3, Dept Reprod Biol, Mexico City, DF, MexicoChhieng, D, Univ Alabama, Dept Pathol, Immunohistochem Lab, KB 627 619 19 St S, Birmingham, AL 35249 USA TI - Spontaneous pregnancy in a woman with premature ovarian failure - A case report AB - BACKGROUND: Women with premature ovarian failure often receive hormonal replacement therapy as part of the management strategy. However, it is very unusual for patients to become pregnant while on hormonal therapy. CASE: A 33-year-old woman with a history of infertility and secondary amenorrhea was diagnosed with premature ovarian failure. Part of her infertility workup included laparoscopy-hysteroscopy, a dye test with methylene blue, and endometrial and bilateral ovarian biopsy. Two months after completion of, this procedure, the patient underwent sonography, which showed an intrauterine pregnancy at 14 weeks' gestation. The pregnancy continued to term, and a healthy infant was born. CONCLUSION: In most instances the etiology of premature ovarian failure is unknown. In rare cases this condition undergoes spontaneous, reversible remission. One interesting observation in our patient is that despite the performance of invasive diagnostic tests, there were minimal detrimental effects on the patient's pregnancy and infant. This case illustrates that the remote possibility of a spontaneous pregnancy in women with premature ovarian failure should always be considered, and invasive diagnostic procedures should be performed when an intrauterine pregnancy is ruled out with certainty MH - USA MH - Mexico|Distrito Federal PB - ST LOUIS: SCI PRINTERS & PUBL INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0024-7758 UR - ISI:000225802800010 L2 - ovarian failure;premature;infertility female;high-risk pregnancy;INTRAUTERINE INJECTION; METHYLENE-BLUE SO - Journal of Reproductive Medicine 2004 ;49(12):989-991 12789 UI - 4430 AU - Viveros-Rogel M AU - Soto-Ramirez L AU - Chaturvedi P AU - Newburg DS AU - Ruiz-Palacios GM AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infect Dis, Mexico City 14000, DF, MexicoUniv Massachusetts, Sch Med, Shriver Ctr, Waltham, MA 02452, USAViveros-Rogel, M, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Infect Dis, Vasco Quiroga 15,Col Tlalpan, Mexico City 14000, DF, Mexico TI - Inhibition of HIV-1 infection in vitro by human milk sulfated glycolipids and glycosaminoglycans MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: KLUWER ACADEMIC/PLENUM PUBL RP - NOT IN FILE U3 - TC 2 U4 - Medicine, Research & Experimental U5 - S;Article AV - English IS - 0065-2598 UR - ISI:000223641000066 L2 - IMMUNODEFICIENCY-VIRUS TYPE-1; GALACTOSYL CERAMIDE; GLYCOPROTEIN GP120; RECEPTOR; CELLS; GLYCOBIOLOGY; ANTIBODIES; BINDING; AGENTS SO - Protecting Infants Through Human Milk 2004 ;554():481-487 12790 UI - 6320 AU - Vizeacoumar FJ AU - Torres-Guzman JC AU - Bouard D AU - Aitchison JD AU - Rachubinski RA AD - Univ Alberta, Dept Cell Biol, Edmonton, AB T6G 2H7, CanadaUniv Guanajuato, Inst Invest Biol Expt, Guanajuato, MexicoInst Syst Biol, Seattle, WA 98103, USARachubinski, RA, Univ Alberta, Dept Cell Biol, Edmonton, AB T6G 2H7, Canada TI - Pex30p, Pex3lp, and Pex32p form a family of peroxisomal integral membrane proteins regulating peroxisome size and number in Saccharomyces cerevisiae AB - The peroxin Pex23p of the yeast Yarrowia lipolytica exhibits high sequence similarity to the hypothetical proteins Ylr324p, Ygr004p, and Ybr168p encoded by the Saccharomyces cerevisiae genome. Ylr324p, Ygr004p, and Ybr168p are integral to the peroxisomal membrane and act to control peroxisome number and size. Synthesis of Ylr324p and Ybr168p, but not of Ygr004p, is induced during incubation of cells in oleic acid-containing medium, the metabolism of which requires intact peroxisomes. Cells deleted for YLR324w exhibit increased numbers of peroxisomes, whereas cells deleted for YGR004w or YBR168w exhibit enlarged peroxisomes. Ylr324p and Ybr168p cannot functionally substitute for one another or for Ygr004p, whereas Ygr004p shows partial functional redundancy with Ylr324p and Ybr168p. Ylr324p, Ygr004p, and Ybr168p interact within themselves and with Pex28p and Pex29p, which have been shown also to regulate peroxisome size and number. Systematic deletion of genes demonstrated that PEX28 and PEX29 function upstream of YLR324w, YGR004w, and YBR168w in the regulation of peroxisome proliferation. Our data suggest a role for Ylr324p, Ygr004p, and Ybr168p-now designated Pex30p, Pex31p, and Pex32p, respectively-together with Pex28p and Pex29p in controlling peroxisome size and proliferation in Saccharomyces cerevisiae MH - Canada MH - Mexico|Guanajuato MH - USA PB - BETHESDA: AMER SOC CELL BIOLOGY RP - NOT IN FILE U3 - TC 31 U4 - Cell Biology U5 - J;Article AV - English IS - 1059-1524 UR - ISI:000188718900026 L2 - NUCLEAR-PORE COMPLEX; YARROWIA-LIPOLYTICA; BIOGENESIS DISORDERS; ZELLWEGER-SYNDROME; CANDIDA-BOIDINII; MATRIX PROTEINS; GENE; PROLIFERATION; YEAST; IMPORT SO - Molecular Biology of the Cell 2004 ;15(2):665-677 12791 UI - 6441 AU - Vlachy V AU - Dominguez H AU - Pizio O AD - Univ Ljubljana, Fac Chem & Chem Technol, Ljubljana 1000, SloveniaUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoVlachy, V, Univ Ljubljana, Fac Chem & Chem Technol, Askerceva 5, Ljubljana 1000, Slovenia TI - Temperature effects in adsorption of a primitive model electrolyte in disordered quenched media: Predictions of the replica OZ/HNC approximation AB - A theoretical study of a quenched-annealed system where both components were modeled as charge symmetric +1: -1 primitive model electrolytes is presented. The adsorbed model electrolyte, mimicking lithium chloride solution, was assumed to be in thermodynamic equilibrium with an external reservoir of the same electrolyte. This partly quenched system was studied by applying the replica Ornstein-Zernike (ROZ) integral equation in the hypernetted chain (HNC) approximation and the grand canonical Monte Carlo technique. The effects of the concentration of matrix ions, pre-quenching conditions, and the electrolyte and solvent conditions on the adsorption of electrolyte were examined. The results indicate that the mean activity coefficient of the adsorbed electrolyte may differ substantially from the value of the corresponding quantity in the equilibrium bulk solution. The concentration of the annealed electrolyte in the matrix can be higher (sorption) or lower (rejection) than the corresponding equilibrium bulk concentration, depending on conditions of matrix preparation and on the temperature of adsorption. An important observation of this study is that the ROZ/HNC approximation can be solved for very high couplings, i.e., we can obtain valid results in the region of parameters where the regular OZ/HNC, applied to the equivalent bulk electrolyte solution, fails to converge. The agreement between the computer simulations and ROZ/HNC results for the adsorption isotherms is good MH - Mexico|Distrito Federal MH - Slovenia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000188199500036 L2 - ORNSTEIN-ZERNIKE EQUATIONS; ION-ION CORRELATIONS; ELECTRONEUTRAL CHARGED MATRICES; INTEGRAL-EQUATION; POROUS-MEDIA; ASSOCIATING ELECTROLYTES; GCMC SIMULATIONS; FLUIDS; THERMODYNAMICS; EQUILIBRIUM SO - Journal of Physical Chemistry B 2004 ;108(3):1046-1055 12792 UI - 5710 AU - Vlaev SJ AU - Rodriguez-Vargas I AU - Gaggero-Sager LM AU - Velasco VR AD - Univ Autonoma Zacatecas, Escuela Fis, Zacatecas, MexicoUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoCSIC, Inst Ciencia Mat, E-28049 Madrid, SpainVlaev, SJ, Univ Autonoma Zacatecas, Escuela Fis, Apartado Postal C-580, Zacatecas, Mexico TI - An alternative way of calculating the superlattice Green function for discrete media AB - We present an alternative and efficient way for calculating the superlattice Green function for discrete systems. The idea is to consider the superlattices as a crystal with the unit cell having the size of the superlattice period in the growth direction. The calculation method takes into account the matrix structure of the system Hamiltonian and a block tridiagonal matrix inversion algorithm. To illustrate the method we study the electronic band structure of a semiconductor superlattice described by means of an empirical sp(3)s* tight-binding Hamiltonian, including nearest-neighbor interactions and spin-orbit coupling. (C) 2004 Published by Elsevier B.V MH - Mexico|Morelos MH - Mexico|Zacatecas MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Physics, Condensed Matter U5 - J;Article AV - English IS - 0039-6028 UR - ISI:000220820700022 L2 - superlattices;Green's function methods;surface electronic phenomena (work function;surface potential, surface states, etc.);ALAS-GAAS SUPERLATTICES; ELECTRONIC-STRUCTURE; HETEROSTRUCTURES; SEMICONDUCTORS; THICKNESS; SYSTEMS; STATES; PERIOD; SCHEME; WELL SO - Surface Science 2004 ;554(2-3):245-252 12793 UI - 6259 AU - Vlasova M AU - Vinokurov VB AU - Grigor'ev ON AU - Panasyuk AD AU - Bega ND AU - Kakazey M AU - Gonzalez-Rodriguez JG AU - Dominguez-Patino G AU - Dominguez-Patino M AD - Univ Autonoma Estado Morelos, Dept Sci & Chem Engn, Cuernavaca 62210, Morelos, MexicoNatl Acad Sci Ukraine, Inst Problems Mat Sci, UA-252680 Kiev, UkraineVlasova, M, Univ Autonoma Estado Morelos, Dept Sci & Chem Engn, Av Univ 1001,Col Chamilpa, Cuernavaca 62210, Morelos, Mexico TI - Features of SiAlON synthesis from kaolin AB - Under conditions of experimental-industrial synthesis of SiAlON from kaolin with the use of carbothermal reduction the fabrication of single-phase beta'-SiAlON with z = 2 is limited by a set of technological parameters: temperature and time of treatment, composition and volume of mixture. The introduction of iron additives in mixture is accompanied by the formation of iron silicides. The regions of melt of the highest iron silicides are the zones of SiAlON formation according to the VLS-mechanism. The powders synthesized in the temperature range of 1723-1873 K from the mixtures of kaolin, carbon, silicon carbide, and iron are the composite ones. (C) 2003 Elsevier B.V. All rights reserved MH - Mexico|Morelos MH - Ukraine PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 2 U4 - Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0921-5093 UR - ISI:000188798800014 L2 - kaolin;nitridation;sialon;iron silicides;MIXTURES; SILICON SO - Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 2004 ;366(2):325-331 12794 UI - 4230 AU - Volke-Sepulveda K AU - Chavez-Cerda S AU - Garces-Chavez V AU - Dholakia K AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, ScotlandVolke-Sepulveda, K, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - Three-dimensional optical forces and transfer of orbital angular momentum from multiringed light beams to spherical microparticles AB - Experimental evidence of transfer of orbital angular momentum of multiringed beams to dielectric particles has been reported recently [e.g., J. Opt. B 4, S82 (2002); Phys. Rev. Lett. 91, 093602 (2003)]. Here we present a detailed theoretical examination of the forces involved in trapping and transferring orbital angular momentum to microparticles due to a multiringed light beam, particularly a Bessel beam. Our investigation gathers, in a more general way, the trapping forces for high-index and low-index dielectric transparent particles, as well as for reflective metallic particles, as a function of particle size and position relative to the dimensions of the rings of the beam. We find that particles can be trapped in different regions of the beam intensity profile according to their size and that an azimuthal force component opposite to the beam helicity may appear under certain circumstances, depending on the relative size and radial equilibrium position with respect to the beam for high-index spheres. (C) 2004 Optical Society of America MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - United Kingdom PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 0740-3224 UR - ISI:000224306500005 L2 - FOCUSED LASER-BEAM; DIELECTRIC SPHERE; LEVITATION; PARTICLES; FIELD; TRAP SO - Journal of the Optical Society of America B-Optical Physics 2004 ;21(10):1749-1757 12795 UI - 5451 AU - Volkow P AU - Velasco SR AU - Mueller N AU - de Leon SP AU - Sierra-Madero JG AU - Sada E AU - Soto JL AU - Perez-Ancona F AU - Ruiz-Palacios G AU - Castillo JR AU - Mohar A AD - Inst Nacl Cancerol, Dept Enfermedades Infecciosas, Mexico City 14080, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 01000, DF, MexicoHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USAInst Nacl Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoInst Nacl Enfermedades Resp, Mexico City 14080, DF, MexicoInst Nacl Neurol & Neurocirug, Mexico City 14269, DF, MexicoHosp Pemex Sur Periterico Sur 4091, Mexico City 14140, DF, MexicoVolkow, P, Inst Nacl Cancerol, Dept Enfermedades Infecciosas, Av San Fernando 22, Mexico City 14080, DF, Mexico TI - Transfusion-associated HIV infection in Mexico related to paid blood donors; HIV epidemic AB - The objective of the study was to describe the clinical, epidemiological profile and conditional incubation period in a group of transfusion-associated HIV-infected (TAHI) patients seen in five national tertiary care centres in Mexico from 1983 to April 1998. Date of transfusions, AIDS diagnoses, opportunistic infections and malignancies were collected. The incubation period was estimated through a non-parametric conditional analysis. One hundred and fifty-seven TAHI cases were analysed. The frequency of TAHI by year of transfusion was: 0.6% in 1980 and 1981, 4.5%, in 1984, 22.4% in 1985, 54.5% in 1986, 10.3% in 1987, 0.6% in 1988, 1.9% in 1989 and 1990, 1.3% in 1993 and 0.6% in 1994 and 1996. The median incubation period was 4.3 years. A well-defined epidemic period of HIV-infection among blood-recipients was identified that coincided with the HIV-epidemic among paid donors. TAHI patients in Mexico developed AIDS in a shorter time than that described for other populations MH - Mexico|Distrito Federal MH - USA PB - LONDON: ROYAL SOC MEDICINE PRESS LTD RP - NOT IN FILE U3 - TC 1 U4 - Immunology;Infectious Diseases U5 - J;Article AV - English IS - 0956-4624 UR - ISI:000221585900013 L2 - transfusion AIDS epidemic;paid donors;COMMERCIAL PLASMA DONORS; HUMAN-IMMUNODEFICIENCY-VIRUS; HEPATITIS-C VIRUS; NON-B-HEPATITIS; KAPOSIS-SARCOMA; NON-A; PLASMAPHERESIS CENTER; INCUBATION PERIOD; AIDS; OUTBREAK SO - International Journal of Std & Aids 2004 ;15(5):337-342 12796 UI - 5839 AU - Volovichev IN AU - Logvinov GN AU - Titov OY AU - Gurevich YG AD - Natl Acad Sci Ukraine, Inst Radiophys & Elect, UA-61085 Kharkov, UkraineInst Politecn Nacl, SEPI, ESIME, Culhuacan 04430, DF, MexicoCINVESTAV IPN, Dept Fis, Mexico City 07300, DF, MexicoVolovichev, IN, Natl Acad Sci Ukraine, Inst Radiophys & Elect, UA-61085 Kharkov, Ukraine TI - Recombination and lifetimes of charge carriers in semiconductors AB - In this Communication, it is shown that models used for describing generation and recombination of electrons and holes lead to disagreements with Maxwell's electrodynamics. Self-consistent expressions, more adequately depicting the actual physical processes of electron-hole recombination in semiconductors are obtained. It is shown that the electron and hole lifetimes can be defined correctly only for the special cases when the electron and hole nonequilibrium concentrations are the same, these lifetimes being equal. The influence of temperature inhomogeneity on the recombination is also considered. The recombination rate for hot electrons is obtained in the case when the electron and hole temperatures differ. (C) 2004 American Institute of Physics MH - Mexico|Distrito Federal MH - Ukraine PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 8 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000220586100093 SO - Journal of Applied Physics 2004 ;95(8):4494-4496 12797 UI - 3895 AU - Von Eye A AU - Pena EG AD - Michigan State Univ, Dept Psychol, E Lansing, MI, USANatl Autonomous Univ Mexico, Mexico City 04510, DF, MexicoVon Eye, A, Michigan State Univ, Dept Psychol, 107D Psychol Bldg, E Lansing, MI USA TI - Configural frequency analysis: the search for extreme cells AB - Configural Frequency Analysis (CFA) asks whether a cell in a cross-classification contains more or fewer cases than expected with respect to some base model. This base model is specified such that cells with more cases than expected (also called types) can be interpreted from a substantive perspective. The same applies to cells with fewer cases than expected (antitypes). This article gives an introduction to bout frequentist and Bayesian approaches to CFA. Specification of base models, testing, and a protection are discussed. In an example, Prediction CFA and two-sample CFA are illustrated. The discussion focuses on the differences between CFA and modelling MH - Mexico|Distrito Federal MH - USA PB - BASINGSTOKE: CARFAX PUBLISHING RP - NOT IN FILE U3 - TC 6 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0266-4763 UR - ISI:000225135500006 L2 - configural frequency analysis (CFA);extreme cells;types;antitypes;base;models;alpha protection;frequentist CFA;Bayesian CFA;Dirichlet distribution;contingency table;PERSON-ORIENTED APPROACH; DEVELOPMENTAL PSYCHOPATHOLOGY; CONTINGENCY-TABLES SO - Journal of Applied Statistics 2004 ;31(8):981-997 12798 UI - 905 AU - Von Osten JR AU - Epomex C AU - Tinoco-Ojanguren R AU - Soares AMVM AU - Guilhermino L AD - Univ Autonoma Campeche, Ctr EPOMEX, Campeche, MexicoECOSUR San Cristobal Casas, Colegio Frontera Sur, Div Poblac & Salud, Chiapas, MexicoUniv Aveiro, Dept Biol, P-3800 Aveiro, PortugalUniv Porto, Lab Ecotoxicol, Dept Estudos Populacoes, Inst Ciencias Biomed Abel Salazar, P-4100 Oporto, PortugalCtr Interdisciplinar Invest Marinha & Ambiental, Lab Ecotoxicol, Oporto, PortugalVon Osten, JR, Univ Autonoma Campeche, Ctr EPOMEX, Apdo Postal 520, Campeche, Mexico TI - Effect of pesticide exposure on acetylcholinesterase activity in subsistence farmers from Campeche, Mexico AB - The authors surveyed agricultural production methods and pesticide use among subsistence farmers (campesinos) in 4 rural communities of Campeche, Mexico. Self-reports of symptoms of poisoning resulting from occupational pesticide exposure were elicited by questionnaire (N = 121), and acetylcholinesterase (AChE) activity during insecticide use was evaluated from blood samples (N = 127). In individuals from 2 of the 4 communities, AChE activity was significantly lower (p < 0.05) than the mean of activity determined for individuals in a reference group. Results of this study show that erythrocyte AChE inhibition provides a good biomarker of exposure to organophosphate pesticides in field studies with human populations. Carbamates, particularly carbofuran, seem to be more associated with exuberant and diversified symptomatology of pesticide exposure than organophosphates. Studies in field communities where both carbamates and organophosphates are suspected to exist should include blood AChE determinations, symptomatology surveys, and socioeconomic questionnaires. The authors recommend that the Mexican National Health Ministry authorities specify additional provisions regarding the use of protective equipment and the adoption of other safety practices during field work, increase information campaigns about the risks of pesticide use and the value of safety practices, and increase programs of medical monitoring and assistance for rural communities dealing with pesticides MH - Mexico|Campeche MH - Mexico|Chiapas MH - Portugal PB - WASHINGTON: HELDREF PUBLICATIONS RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0003-9896 UR - ISI:000232758600005 L2 - acetylcholinesterase;campesinos;exposure;farmers;organophosphates;pesticides SO - Archives of Environmental Health 2004 ;59(8):418-425 12799 UI - 5460 AU - Vossenaar M AU - Anderson AS AU - Lean MEJ AU - Ocke MC AU - Valdes-Ramos R AU - Mayorga E AU - Solomons NW AD - Univ Dundee, Ninewells Hosp & Med Sch, Dundee DD1 9SY, ScotlandNatl Inst Publ Hlth & Environm, NL-3720 BA Bilthoven, NetherlandsUniv Glasgow, Glasgow G12 8QQ, Lanark, ScotlandUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoCtr Studies Sensory Impairment Aging & Metab, Guatemala City, Guatemala TI - Alcohol consumption in relationship to cancer prevention recommendations - the 4-country study MH - Guatemala MH - Mexico|Distrito Federal MH - Netherlands MH - United Kingdom PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470700608 SO - Faseb Journal 2004 ;18(5):A885-A885 12800 UI - 4344 AU - Vovides AP AU - Perez-Farrera MA AU - Schutzman B AU - Iglesias C AU - Hernandez-Sandoval L AU - Martinez M AD - Jardin Bot Fco J Clavijero, Inst Ecol, Xalapa 91000, Veracruz, MexicoUniv Autonoma Queretaro, Fac Ciencias Nat, Escuela Biol, Queretaro, Queretaro, MexicoUniv Ciencias & Artes Chiapas, Escuela Biol, Tuxtla Gutierrez 29000, Chiapas, MexicoUniv Florida, Dept Environm Hort, Gainesville, FL 32611, USAVovides, AP, Jardin Bot Fco J Clavijero, Inst Ecol, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - A new species of Ceratozamia (Zamiaceae) from Tabasco and Chiapas, Mexico AB - Ceratozamia becerrae sp. nov. is described and illustrated. This species from Tabasco and Chiapas has affinity with C. miqueliana H. Wendl. from Veracruz and Chiapas, but differs in morphology and habit of leaves, leaflets, male and female strobili and trunk. Ceratozamia becerrae is considered part of the C. miqueliana species complex that includes C. miqueliana, C. euryphyllidia Vazq.Torres, Sabato & Stevenson and C. zoquorum Perez-Farrera, Vovides & Iglesias. The geographical range of this species complex is southern Veracruz, Tabasco and northern Chiapas in tropical rain forests. (C) 2004 The Linnean Society of London MH - Mexico|Chiapas MH - Mexico|Queretaro MH - Mexico|Veracruz MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0024-4074 UR - ISI:000224035000011 L2 - cycad;floristic refuges;Mesoamerica;Pleistocene;species complex SO - Botanical Journal of the Linnean Society 2004 ;146(1):123-128 12801 UI - 5498 AU - Wada R AU - Keutgen T AU - Hagel K AU - Ma YG AU - Wang J AU - Murray M AU - Qin L AU - Smith P AU - Natowitz JB AU - Alfarro R AU - Cibor J AU - Cinausero M AU - El Masri Y AU - Fabris D AU - Fioretto E AU - Keksis A AU - Kowalski S AU - Lunardon M AU - Makeev A AU - Marie N AU - Martin E AU - Majka Z AU - Martinez-Davalos A AU - Menchaca-Rocha A AU - Nebbia G AU - Prete G AU - Rizzi V AU - Ruangma A AU - Shetty DV AU - Souliotis G AU - Staszel P AU - Veselsky M AU - Viesti G AU - Winchester EM AU - Yennello SJ AU - Zipper W AU - Ono A AD - Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843, USARIKEN, Cyclotron Ctr, Beam Technol Div, Wako, Saitama 3510198, JapanUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoInst Nucl Phys, PL-31342 Krakow, PolandIst Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, ItalyUniv Catholique Louvain, FNRS, B-1348 Louvain, BelgiumUniv Catholique Louvain, IPN, B-1348 Louvain, BelgiumIst Nazl Fis Nucl, I-35131 Padua, ItalyUniv Padua, Dipartimento Fis, I-35131 Padua, ItalyUniv Silesia, Inst Phys, PL-40007 Katowice, PolandJagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, PolandTohoku Univ, Dept Phys, Sendai, Miyagi 9808578, JapanUniv Kansas, Lawrence, KS 66045, USAInst Sci Mat & Rayonnement, LCP Caen, CNRS, IN2P3, F-14050 Caen, FranceWada, R, Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843, USA TI - Reaction dynamics and multifragmentation in Fermi energy heavy ion reactions AB - The reaction systems, Zn-64+Ni-58, Zn-64+Mo-92, Zn-64+Au-197, at 26, 35, and 47 A MeV, have been studied both in experiments with a 4pi detector array, NIMROD, and with antisymmetrized molecular dynamics model calculations employing effective interactions corresponding to soft and stiff equation of state (EOS). Direct experimental observables, such as multiplicity distributions, charge distributions, energy spectra and velocity spectra, have been compared in detail with those of the calculations and a reasonable agreement is obtained for both EOS's. No conclusive preference for either EOS has been observed. Neither of the above direct observables nor the strength of the elliptic flow are also sensitive to changes in the in-medium nucleon-nucleon cross sections. A detailed analysis of the central collision events revealed that multifragmentation with cold fragment emission is a common feature predicted for all reactions studied here. A possible multifragmentation scenario is presented; after the preequilibrium emission ceases in the composite system, cold light fragments are formed in a hotter gas of nucleons and stay cold until the composite system underdoes multifragmentation. For reaction with Au-197 at 47A MeV a significant radial expansion takes place. For reactions with Ni-58 and Mo-92 at 47A MeV semitransparency becomes prominent. The differing reaction dynamics drastically change the kinematic characteristics of emitted fragments. This scenario gives consistent explanations for many existing experimental results in the Fermi energy domain MH - Belgium MH - France MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Poland MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000221427500045 L2 - ANTISYMMETRIZED MOLECULAR-DYNAMICS; MICROSCOPIC CALCULATION; EMISSION TEMPERATURES; EXCITATION-ENERGIES; CROSS-SECTIONS; 35A MEV; COLLISIONS; FLOW; NUCLEI; SYSTEMATICS SO - Physical Review C 2004 ;69(4): 12802 UI - 4241 AU - Walker DM AU - Torres P AU - Gutierrez JP AU - Flemming K AU - Bertozzi SM AD - Natl Inst Publ Hlth, INSP, Div Hlth Econ & Policy, Cuernavaca 62508, Morelos, MexicoNatl Inst Publ Hlth, INSP, Div Reprod Hlth, Cuernavaca 62508, Morelos, MexicoUniv Calif San Francisco, San Francisco, CA 94143, USAGutierrez, JP, Natl Inst Publ Hlth, INSP, Div Hlth Econ & Policy, Avenida Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Emergency contraception use is correlated with increased condom use among adolescents: Results from Mexico AB - Purpose: To evaluate the association between knowledge about, or experience with, emergency Contraception (EC), and condom use among school-attending adolescents in the state of Morelos, Mexico. Methods: We analyzed data from anonymously self-administered questionnaires (n = 10,918), from a cluster-randomized controlled trial among first year students from 40 (75%) public high schools in Morelos, Mexico. The survey included specific questions about EC knowledge and experience as well as questions about perceived ability to negotiate and condition sexual relations on condom use; and condom use at first and last sexual intercourse. Results: Overall, 61% (6384) of students had heard of EC, and 36% (1964) of girls and 39% (1997) of boys had correct knowledge about EC. Correct knowledge was based upon knowing that EC is pills taken up to 3 days after unprotected sex to prevent pregnancy. Of 1695 (15.6%) reporting lifetime sexual activity, 16.4% (275) reported they had tried to obtain EC and almost of all them (263) reported having used EC. The probability of a student reporting he/she is capable of interrupting sexual intercourse to use a condom was significantly higher for those who had correct EC knowledge, and a history of EC use was strongly correlated with condom use at last sexual intercourse. Conclusions: Experience with emergency contraception has no adverse effects on condom use, but rather is associated with an increased probability of condom use and an increased perceived capacity to negotiate condom use. Despite concern that information about, and access to EC may encourage sexual risk taking, our results suggest the reverse is true. These data support the position that there is no justification to withhold EC information or access from adolescents. (C) Society for Adolescent Medicine, 2004 MH - Mexico|Morelos MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Psychology, Developmental;Public, Environmental & Occupational Health;Pediatrics U5 - J;Article AV - English IS - 1054-139X UR - ISI:000224211300010 L2 - emergency contraception;adolescents;contraceptive behavior;Mexico;ADVANCE PROVISION; KNOWLEDGE; ATTITUDES; CITY; PROVIDERS; PREGNANCY SO - Journal of Adolescent Health 2004 ;35(4):329-334 12803 UI - 4575 AU - Walter JE AU - Afflerbach C AU - Jiang X AU - Matson DO AU - Pickering LK AU - Guerrero ML AU - Ruiz-Palacios G AU - Mitchell DK AD - Ctr Dis Control & Prevent, Natl Immunizat Program, Atlanta, GA, USAChildrens Hosp, Med Ctr, Cincinnati, OH 45229, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoEastern Virginia Med Sch, Ctr Pediat Res, Norfolk, VA 23501, USA TI - Characterization of a novel astrovirus from Mexican children MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591100345 SO - Pediatric Research 2004 ;55(4):58A-58A 12804 UI - 3514 AU - Walton D AU - Boehnel H AU - Dunlop DJ AD - McMaster Univ, Dept Phys, Hamilton, ON, CanadaUNAM, Inst Geociencias, Mexico City, DF, MexicoUniv Toronto, Dept Phys, Mississauga, ON L5L 1C6, CanadaWalton, D, McMaster Univ, Dept Phys, Hamilton, ON, Canada TI - 2d order ferromagnetic resonance in nanoparticles AB - The 2d order photon decay to two magnons of equal and opposite wave-vector in ferromagnetic resonance is discussed, with emphasis on two applications: the remagnetization of dilute assemblies of magnetic nanoparticles with high power microwave fields, and the isolation and measurement of magnetic overprints. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Canada MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0031-8965 UR - ISI:000226038200008 L2 - SINGLE-DOMAIN GRAINS; MAGNETIC-RESONANCE; TEMPERATURE SO - Physica Status Solidi A-Applied Research 2004 ;201(15):3257-3262 12805 UI - 3777 AU - Walton D AU - Boehnel H AU - Dunlop DJ AD - McMaster Univ, Dept Phys, Hamilton, ON, CanadaUNAM, Ctr Geociencias, Mexico City, DF, MexicoUniv Toronto, Dept Phys, Mississauga, ON L5L 1C6, CanadaWalton, D, McMaster Univ, Dept Phys, Hamilton, ON, Canada TI - Response of magnetic nanoparticles to microwaves AB - Two important processes in ferromagnetic resonance are the first-order absorption of a photon and creation of a single magnon, and a second-order process in which the absorption of a photon results in the creation of two magnons of equal and opposite wave vector [M. Sparks, Ferromagnetic Relaxation (McGraw-Hill, New York, 1964)]. We have found that under resonance conditions for the second-order process, samples containing similar to0.1% magnetite absorb energy from the microwave field at the same rate as a solid magnetite sample. The resultant very high-energy density in the magnetic nanoparticles, coupled with a significant thermal energy barrier with the matrix, leads to a large temperature difference between the grains and their surroundings that makes it possible to magnetize and demagnetize the sample with a relatively small increase in sample temperature. (C) 2004 American Institute of Physics MH - Canada MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000225483700080 L2 - RESONANCE SO - Applied Physics Letters 2004 ;85(22):5367-5369 12806 UI - 3847 AU - Wang JK AU - van Ginkel M AU - Trethowan R AU - Ye GY AU - DeLacy I AU - Podlich D AU - Cooper M AD - CIMMYT, Mexico City 06600, DF, MexicoUniv Queensland, Sch Land & Food Sci, Brisbane, Qld 4072, AustraliaPioneer HiBred Int Inc, Johnston, IA 50131, USAWang, JK, CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Simulating the effects of dominance and epistasis on selection response in the CIMMYT wheat breeding program using QuCim AB - Plant breeders use many different breeding methods to develop superior cultivars. However, it is difficult, cumbersome, and expensive to evaluate the performance of a breeding method or to compare the efficiencies of different breeding methods within an ongoing breeding program. To facilitate comparisons, we developed a QU-GENE module called QuCim that can simulate a large number of breeding strategies for self-pollinated species. The wheat breeding strategy "Selected Bulk" used by CIMMYT's wheat breeding program was defined in QuCim as an example of how this is done. This selection method was simulated in QuCim to investigate the effects of deviations from the additive genetic model, in the form of dominance and epistasis, on selection outcomes. The simulation results indicate that the partial dominance model does not greatly influence genetic advance compared with the pure additive model. Genetic advance in genetic systems with overdominance and epistasis are slower than when gene effects are purely additive or partially dominant. The additive gene effect is an appropriate indicator of the change in gene frequency following selection when epistasis is absent. In the absence of epistasis, the additive variance decreases rapidly with selection. However, after several cycles of selection it remains relatively fixed when epistasis is present. The variance from partial dominance is relatively small and therefore hard to detect by the covariance among half sibs and the covariance among full sibs. The dominance variance from the overdominance model can be identified successfully, but it does not change significantly, which confirms that overdominance cannot be utilized by an inbred breeding program. QuCim is an effective tool to compare selection strategies and to validate some theories in quantitative genetics MH - Australia MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000225153000022 L2 - SINGLE SEED DESCENT; COMPUTER-SIMULATION; POPULATIONS; GENE SO - Crop Science 2004 ;44(6):2006-2018 12807 UI - 4149 AU - Wang Q AU - Dong YC AU - Li SL AU - Duan LM AU - Xu HS AU - Xu HG AU - Chen RF AU - Wu HY AU - Han JL AU - Li ZC AU - Lu XQ AU - Zhao K AU - Liu JC AU - Sergey YK AD - Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R ChinaChinese Acad Sci, Grad Sch, Beijing 100039, Peoples R ChinaChina Inst Atom Energy, Beijing 102413, Peoples R ChinaUNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoANU, Nonlinear Phys Grp, Canberra, ACT, AustraliaANU, Dept Theoret Phys, RSPhysSE, Canberra, ACT, AustraliaWang, Q, Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China TI - Angular distribution and angular dispersion in collision of F-19+(27) Al at 114 MeV AB - Angular distributions of fragments B, C, N, O, F, Ne, Na, Mg and Al induced by the collision of F-19+Al-27 at 114 MeV have been measured. Angular dispersion parameters are extracted from the experimental data and compared with the theoretical ones. The dynamic dispersions for dissipative products depend strongly on the charge number Z of the fragments MH - Australia MH - Mexico|Morelos MH - Peoples R China PB - BEIJING: CHINESE PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0256-307X UR - ISI:000224453100013 L2 - DEEP INELASTIC-COLLISIONS; DISSIPATIVE REACTIONS; NON-REPRODUCIBILITY; CROSS-SECTIONS; COHERENCE SO - Chinese Physics Letters 2004 ;21(10):1911-1913 12808 UI - 5453 AU - Wang XY AU - Luo H AU - Yang HP AU - Sebastian PJ AU - Gamboa SA AD - Xiangtan Univ, Coll Chem & Chem Engn, Hunan 411105, Peoples R ChinaUNAM, CIE, Solar Hydrogen Fuel Cell Grp, Temixco 62580, Morelos, MexicoInst Mexicano Petr, Programa Invest & Desarrollo Ductos, Mexico City 07730, DF, MexicoWang, XY, Xiangtan Univ, Coll Chem & Chem Engn, Hunan 411105, Peoples R China TI - Oxygen catalytic evolution reaction on nickel hydroxide electrode modified by electroless cobalt coating AB - Oxygen evolution reaction was studied in alkaline medium on a nickel hydroxide electrode modified by electroless cobalt coating. The presence of cobalt coating at the surface of nickel hydroxide can increase the oxygen evolution overpotential promoting full charge of the electrode. It has been found that the oxygen evolution potential at this kind of electrode was apparently higher than that on the nickel hydroxide electrode added with cobalt powder as a conductor. Kinetic studies have also shown that this kind of electrode has a greater Tafel slope for oxygen evolution reaction. The mechanism of oxygen evolution has also been discussed. (C) 2003 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Peoples R China PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Energy & Fuels;Environmental Sciences;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0360-3199 UR - ISI:000221586300010 L2 - nickel hydroxide;oxygen evolution;metal hydride battery;electroless cobalt;OXIDE ELECTRODES; ACTIVE MATERIAL; THIN-FILMS; ELECTROCHEMISTRY SO - International Journal of Hydrogen Energy 2004 ;29(9):967-972 12809 UI - 5819 AU - Wang Y AU - Martinez-Rios A AU - Po H AD - Lasersharp Corp, Hopkinton, MA 01748, USAMcMaster Univ, Dept Engn Phys, Hamilton, ON L8S 4L7, CanadaCtr Invest Opt AC, Leon 37000, Gto, MexicoWang, Y, Lasersharp Corp, 86 South St, Hopkinton, MA 01748, USA TI - Experimental study of stimulated Brillouin and Raman scatterings in a Q-switched cladding-pumped fiber laser AB - Characteristics of stimulated Brillouin and Raman scatterings (SBS and SRS) in a Q-switched cladding-pumped ytterbium (Yb)-doped fiber laser are experimentally investigated. A stable SBS pulse train with a width of similar to2 ns and a peak power of similar to1.0 kW can be generated in regular Q-switching processes under certain conditions. The time jitter and intensity fluctuation of SBS pulses are presented, and their mechanism and statistics are discussed. The accompanied Raman-Stokes waves in regular Q-switched pulses and SBS pulses are quantitatively compared. (C) 2003 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Guanajuato MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 9 U4 - Engineering, Electrical & Electronic;Optics;Telecommunications U5 - J;Article AV - English IS - 1068-5200 UR - ISI:000220574200005 L2 - fiber laser;stimulated Brillouin scattering (SBS);stimulated Raman scattering (SRS);Q-switched cladding-pumped;OPTICAL-FIBER; DYNAMICS; LOCKING SO - Optical Fiber Technology 2004 ;10(2):201-214 12810 UI - 3412 AU - Wang ZH AU - Jensen CM AU - Sugiarti S AU - Morales-Morales D AD - Univ Hawaii, Dept Chem, Honolulu, HI 96822, USAUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico TI - Catalytic hydroxylation of 1-propanol by platinum NCN and PCP pincer complexes using CUCL2 as oxidant MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000223655605186 SO - Abstracts of Papers of the American Chemical Society 2004 ;227():U1534-U1534 12811 UI - 4840 AU - Waniska RD AU - Cepeda M AU - King BS AU - Adams JL AU - Rooney LW AU - Torres PI AU - Lookhart GL AU - Bean SR AU - Wilson JD AU - Bechtel DB AD - Texas A&M Univ, Dept Soil & Crop Sci, Cereal Qual Lab, College Stn, TX 77843, USAPizza Hut Inc, Dallas, TX, USAFrito Lay, Plano, TX, USASonoma State Univ, Dept Invest & Posgrado Alimentos, Hermosillo 83000, Sonora, MexicoUSDA ARS, N Cent Reg, US Grain Mkt Res Lab, Manhattan, KS 66502, USAWaniska, RD, Texas A&M Univ, Dept Soil & Crop Sci, Cereal Qual Lab, 370 Olsen Blvd, College Stn, TX 77843 USA TI - Effects of flour properties on tortilla qualities AB - Sixty-one commercial tortilla flours were tested for tortilla properties using a standardized tortilla bake test. Flour, dough, and tortilla properties were evaluated. All flours tested yielded tortillas with acceptable appearance and opacity, attributes important for the tortilla market. Twenty-eight of the tortilla flours yielded tortillas with a larger diameter, longer shelf stability, and higher moisture content, attributes that are desirable for many retail and wholesale markets. Data for the flours tested confirmed the results of previous tortilla research, i.e., more protein or damaged starch in the flour corresponded to smaller diameter tortillas with improved storage stability and intermediate protein content yielded better quality tortillas. Data from the 28 flours yielding good quality tortillas provided more support for the impact of damaged starch and less support for the impact of proteins on tortilla quality: 1) tortilla diameter correlated with A starch granules and negatively with B starch granules and damaged starch measured by enzyme-susceptible starch (ESS); 2) tortilla stability correlated with mixing time and damaged starch measured by ESS and negatively with resistance to mixing; and 3) tortilla moisture content correlated with amounts of insoluble polymeric protein, soluble polymeric protein, and gliadin. The flour qualities needed to yield good quality tortillas are not well defined; however, components should include protein content (10.0-12.0%), intermediate protein quality, and lower levels of starch damage during milling MH - Mexico|Sonora MH - USA PB - ST PAUL: AMER ASSOC CEREAL CHEMISTS RP - NOT IN FILE U3 - TC 3 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0146-6283 UR - ISI:000222890100004 L2 - WHEAT-FLOUR; TEXTURAL PROPERTIES; WAXY WHEAT; STARCH; SIZE; PROTEINS SO - Cereal Foods World 2004 ;49(4):237-244 12812 UI - 4174 AU - Waples DW AU - Pacheco J AU - Vera A AD - Pemex Explorac & Prod, Campeche 24160, MexicoWaples, DW, 9299 William Cody Dr, Evergreen, CO 80439, USA TI - A method for correcting log-derived temperatures in deep wells, calibrated in the Gulf of Mexico AB - A method for correcting log-derived temperatures in deep wells (3500-6500 m) has been developed by comparing log temperatures from the Gulf of Campeche (Mexican Gulf of Mexico) with DST temperatures in the same wells. The equations developed in this study are modified slightly from those of Waples & Mahadir Ramly (2001), which were calibrated using data from depths <3500 m in Malaysia. The correction depends strongly on time since end of mud circulation (TSC) and, to a much lesser degree, on depth. In this study the true subsurface temperature (Celsius) is given by T-true = T-surf+f(.)(T-meas - T-surf) - 0.001391(Z- 4498) where f=1.32866(-0.005289TSC) T-surf is the seafloor or land-surface temperature (degreesC), T-meas is the measured log temperature (degreesC), TSC is in hours and Z is depth below seafloor in metres. If TSC is unknown, it can be estimated from the trend of TSC with depth. An estimate of the uncertainty in the corrected temperature is obtained from the equation: sigma=0.10842(-0.029TSC) where sigma is the standard deviation of the correction factor f. The uncertainty in the correction factor f can be expressed as+/- 2sigma MH - Mexico|Campeche MH - USA PB - BATH: GEOLOGICAL SOC PUBL HOUSE RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 1354-0793 UR - ISI:000224336500005 L2 - temperature correction;log temperatures SO - Petroleum Geoscience 2004 ;10(3):239-245 12813 UI - 4948 AU - Warburton ML AU - Brown-Guedira GL AU - Nelson RL AD - Univ Illinois, USDA ARS, Soybean Maize Germplasm Pathol & Genet Res Unit, Dept Crop Sci, Urbana, IL 61801, USACIMMYT Int, Mexico City 06600, DF, MexicoKansas State Univ, USDA ARS, Plant Sci Entomol Res Unit, Dept Agron,Throckmorton Plant Sci Ctr 2001, Manhattan, KS 66506, USANelson, RL, Univ Illinois, USDA ARS, Soybean Maize Germplasm Pathol & Genet Res Unit, Dept Crop Sci, 1101 W Peabody Dr, Urbana, IL 61801 USA TI - Registration of LG92-4208, LG94-1128, LG94-1906, and LG94-4667 soybean germplasm MH - USA MH - Mexico|Distrito Federal PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000222582400085 L2 - MARKERS; RAPD SO - Crop Science 2004 ;44(4):1501-1502 12814 UI - 5072 AU - Warnberg J AU - Romeo J AU - Nova E AU - Gomez S AU - Valdes-Ramos R AU - Marcos A AD - CSIC, Grp Immunonutr, Dep Metab & Nutr, E-28040 Madrid, SpainUniv Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - Effect of fiber supplementation on intestinal regulation in healthy adolescents. Adverse or beneficial effects? MH - Mexico|Distrito Federal MH - Spain PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602374 SO - Faseb Journal 2004 ;18(4):A492-A493 12815 UI - 5945 AU - Waters SB AU - Devesa V AU - Del Razo LM AU - Styblo M AU - Thomas DJ AD - US EPA, Pharmacokinet Branch,Off Res & Dev, Expt Toxicol Div, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711, USAUniv N Carolina, Sch Publ Hlth, Dept Nutr, Chapel Hill, NC 27599, USAUniv N Carolina, Sch Med, Dept Pediat, Curriculum Toxicol,Ctr Environm Med Asthma & Lung, Chapel Hill, NC 27599, USANatl Polytech Inst, Ctr Res & Adv Studies, Dept Environm Toxicol, Mexico City, DF, MexicoThomas, DJ, US EPA, Pharmacokinet Branch,Off Res & Dev, Expt Toxicol Div, Natl Hlth & Environm Effects Res Lab, Res Triangle Pk, NC 27711 USA TI - Endogenous reductants support the catalytic function of recombinant rat Cyt19, an arsenic methyltransferase AB - The postulated scheme for the metabolism of inorganic As involves alternating steps of oxidative methylation and of reduction of As from the pentavalent to the trivalent oxidation state, producing methylated compounds containing As-III that are highly reactive and toxic. S-Adenosyl-L-methionine: As-III methyltransferase purified from rat liver catalyzes production of methyl and dimethyl arsenicals from inorganic As. This protein is encoded by the cyt19 gene orthologous with cyt19 genes in mouse and human. The reductants dithiothreitol or tris(2-carboxylethyl)phosphine support catalysis by recombinant rat cyt19 (rrcyt19). Coupled systems containing an endogenous reductant (thioredoxin/thioredoxin reductase/NADPH, glutaredoxin/glutathione/glutathione reductase/NADPH, or lipoic acid/thioredoxin reductase/NADPH) support inorganic As methylation by rrcyt19. Although glutathione alone does not support rrcyt19's catalytic function, its addition to reaction mixtures containing other reductants increases the rate of As methylation. Aurothioglucose, an inhibitor of thioredoxin reductase, reduces the rate of As methylation by rrcyt19 in thioredoxin-supported reactions. Addition of guinea pig liver cytosol, a poor source of endogenous As methyltransferase activity, to reaction mixtures containing rrcyt19 shows that endogenous reductants in cytosol support the enzyme's activity. Methylated compounds containing either As-III or As-V are detected in reaction mixtures containing rrcyt19, suggesting that cycling of As between oxidation states is a component of the pathway producing methylated arsenicals. This enzyme may use endogenous reductants to reduce pentavalent arsenicals to trivalency as a prerequisite for utilization as substrates for methylation reactions. Thus, cyt19 appears to possess both As-III methyltransferase and As-V reductase activities MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Chemistry, Medicinal;Chemistry, Multidisciplinary;Toxicology U5 - J;Article AV - English IS - 0893-228X UR - ISI:000220303600015 L2 - PURINE NUCLEOSIDE PHOSPHORYLASE; THIOETHER S-METHYLTRANSFERASE; AUREUS PLASMID PI258; THIOREDOXIN REDUCTASE; MONOMETHYLARSONIC ACID; MAMMALIAN SYSTEMS; ENZYMATIC METHYLATION; MMA(V) REDUCTASE; RABBIT LIVER; LIPOIC ACID SO - Chemical Research in Toxicology 2004 ;17(3):404-409 12816 UI - 6111 AU - Watson AM AU - Stapelfeldt KR AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoCALTECH, Jet Prop Lab, Pasadena, CA 91109, USAWatson, AM, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Apartado Postal 3-72, Morelia 58089, Michoacan, Mexico TI - The visible and near-infrared dust opacity law in the HH 30 circumstellar disk AB - We present new images of the scattered-light disk around HH30 at 0.44 and 0.81 mum. We model these images and an existing 2.04 mum image by using a multiple-scattering code, varying and fitting for the disk parameters and the dust opacity ratios at these wavelengths. A wide range of different disk geometries provide adequate fits to the data; there is no single best-fit geometry. In particular, the fits cannot resolve the ambiguity between the power-law indices in surface density and scale height. On the other hand, the inclination, opacity-mass product, scale height, and to a lesser degree the extinction to the star are relatively tightly constrained. Despite the ambiguity in geometry, we conclude that the dust opacity in the scattering layers of the outer parts of the HH 30 circumstellar disk drops from 0.44 to 2.04 mum, but by less than in the low-density ISM. The median fit shows a drop by a factor of less than 2. This result is robust to reasonable changes in the disk density distribution. It suggests that moderate grain growth has occurred but that small grains still dominate the visible and near-infrared opacity MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000189343700025 L2 - circumstellarmatter;planetary systems : protoplanetary disks;stars : individual (HH30);stars : pre-main-sequence;T-TAURI STARS; SPECTRAL ENERGY-DISTRIBUTION; ON-ORBIT PERFORMANCE; ACCRETION DISKS; YOUNG OBJECTS; GRAIN-GROWTH; HH 30; PROTOPLANETARY DISK; SCATTERED-LIGHT; IRRADIATION SO - Astrophysical Journal 2004 ;602(2):860-874 12817 UI - 4547 AU - Watson DM AU - Kemper F AU - Calvet N AU - Keller LD AU - Furlan E AU - Hartmann L AU - Forrest WJ AU - Chen CH AU - Uchida KI AU - Green JD AU - Sargent B AU - Sloan GC AU - Herter TL AU - Brandl BR AU - Houck JR AU - Najita J AU - D'Alessio P AU - Myers PC AU - Barry DJ AU - Hall P AU - Morris PW AD - Univ Rochester, Dept Phys & Astron, Rochester, NY 14627, USAUniv Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095, USAHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAIthaca Coll, Dept Phys, Ithaca, NY 14850, USACornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853, USACALTECH, Jet Prop Lab, Pasadena, CA 91109, USASterrewacht Leiden, NL-2300 RA Leiden, NetherlandsNatl Opt Astron Observ, Tucson, AZ 85719, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoCALTECH, Spitzer Sci Ctr, Ctr Infrared Proc & Anal, Pasadena, CA 91125, USAWatson, DM, Univ Rochester, Dept Phys & Astron, Rochester, NY 14627, USA TI - Mid-infrared spectra of Class I protostars in Taurus AB - We present Spitzer Space Telescope Infrared Spectrograph observations in the 5.3-20 mum range of five young stellar objects in Taurus that have Class I continuum spectral energy distributions (lambdaF(lambda)alphalambda(n), ngreater than or equal to0), often taken to represent the youngest stellar objects in this star formation region. The spectra include a rich collection of broad absorption features that we identify with amorphous silicates and various ices, notably those of carbon dioxide and water. We show that the absorption features are produced mainly in the envelopes of these systems. The apparent depths of silicate and 15.2 mum CO2 ice features vary among the objects in a manner that is consistent with a variation of inclination with respect to the line of sight, contribution to the silicate features from material throughout the envelopes, and an origin for the CO2 ice feature in the outer parts of the envelope. Thus, these features provide new and useful constraints on models of the physical structure of Class I protostars MH - Mexico|Michoacan MH - Netherlands MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 19 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000223634300071 L2 - accretion, accretion disks;circumstellar matter;infrared : stars;stars : formation;stars : pre-main-sequence;AURIGA MOLECULAR CLOUD; YOUNG STELLAR OBJECTS; 2-DIMENSIONAL RADIATIVE-TRANSFER; PROTOSTELLAR ENVELOPES; ABSORPTION FEATURES; CO OBSERVATIONS; DENSE CORES; STARS; SEQUENCE; ICE SO - Astrophysical Journal Supplement Series 2004 ;154(1):391-395 12818 UI - 4602 AU - Wawrzyniec TF AU - Ambrose W AU - randa-Garcia M AU - Romano UH AD - Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131, USAUniv Texas, Jackson Sch Geosci, Bur Econ Geol, Austin, TX 78713, USAPemex Explorac & Prod, Act Reg Explorac RN, Coordinac Proyectos Marinos, Poza Rica 93370, Veracruz, MexicoPemex Explorac & Prod, Act Integral Poza Rica Altamira, Equipo Multidisciplinario Desarrollo Nuevas Oport, Poza Rica 93370, Veracruz, MexicoWawrzyniec, TF, Univ New Mexico, Dept Earth & Planetary Sci, 131 Northrop Hall, Albuquerque, NM 87131 USA TI - Tectonic forcing of shelf-ramp depositional architecture, Laguna Madre-Tuxpan Shelf, western Gulf of Mexico (vol 31, art no L13614, 2004) MH - Mexico|Veracruz MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 0 U4 - Geosciences, Multidisciplinary U5 - J;Correction AV - English IS - 0094-8276 UR - ISI:000223544600008 SO - Geophysical Research Letters 2004 ;31(16): 12819 UI - 5075 AU - Webb AL AU - Ramakrishnan U AU - Neufeld LM AU - Gonzalez-Cossio T AU - Rivera J AU - Martorell R AD - Emory Univ, Atlanta, GA 30322, USAEmory Univ, Dept Int Hlth, Rollins Sch Publ Hlth, Atlanta, GA 30322, USACtr Invest Nutr & Salud, Inst Nacl Salud Publ, Cuernavaca, Morelos, Mexico TI - Effects of multiple micronutrient supplements on morbidity in young Mexican children MH - Mexico|Morelos MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000220470602467 SO - Faseb Journal 2004 ;18(4):A512-A512 12820 UI - 5764 AU - Webb DM AU - Cortes-Ortiz L AU - Zhang JZ AD - Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109, USAUniv Veracruzana, Inst Neuroetol, Veracruzana, MexicoUniv Veracruzana, Ctr Invest Trop, Veracruzana, MexicoZhang, JZ, Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA TI - Genetic evidence for the coexistence of pheromone perception and full trichromatic vision in howler monkeys AB - Vertebrate pheromones are water-soluble chemicals perceived mainly by the vomeronasal organ (VNO) for intraspecific communications. Humans, apes, and Old World (OW) monkeys lack functional genes responsible for the pheromone signal transduction and are generally insensitive to vomeronasal pheromones. It has been hypothesized that the evolutionary deterioration of pheromone sensitivity occurred because pheromone communication became redundant after the emergence of full trichromatic color vision via the duplication of the X-chromosome-linked red/green opsin gene in the common ancestor of hominoids and OW monkeys. Interestingly, full trichromacy also evolved in the New World (NW) howler monkeys via an independent duplication of the same gene. Here we sequenced from three species of howler monkeys an essential component of the VNO pheromone transduction pathway, the gene encoding the ion channel TRP2. In contrast to those of hominoids and OW monkeys, the howler TRP2 sequences have none of the characteristics of pseudogenes. This and other observations indicate that howler monkeys have maintained both their systems of pheromone communication and full trichromatic vision, suggesting that the presence of full trichromacy alone does not lead to the loss of pheromone communication. We suggest that the ecological differences between OW and NW primates, particularly in habitat selection, may have also affected the evolution of pheromone perception MH - USA MH - Mexico|Veracruz PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 12 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0737-4038 UR - ISI:000220685200009 L2 - NEW-WORLD MONKEYS; VOMERONASAL ORGAN; COLOR-VISION; MOLECULAR EVOLUTION; POSITIVE SELECTION; SAIMIRI-SCIUREUS; MULTIGENE FAMILY; DNA-SEQUENCES; PRIMATES; RECEPTORS SO - Molecular Biology and Evolution 2004 ;21(4):697-704 12821 UI - 6206 AU - Webb SA AU - Graves JA AU - ias-Garcia C AU - Magurran AE AU - Foighil DO AU - Ritchie MG AD - Univ St Andrews, Sch Biol, St Andrews KY16 9TS, Fife, ScotlandUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, MexicoUniv Michigan, Museum Zool, Ann Arbor, MI 48109, USAWebb, SA, William Woods Univ, Dept Biol, Fulton, MO 65251, USA TI - Molecular phylogeny of the livebearing Goodeidae (Cyprinodontiformes) AB - The Goodeinae is a speciose group of viviparous freshwater fishes endemic to the Mesa Central of Mexico. The current taxonomy of the group is based on morphology associated with viviparity and several of the groupings are questionable. We sequenced part of the mitochondrial cytochrome c oxidase subunit I (COI) gene (627 bp) and control region (approximate to430 bp aligned) of representatives of 36 species (all genera) of goodeid fishes in order to establish phylogenetic relationships among the taxa. Findings support the monophyly of the Goodeidae, the sister-group relationship of the Empetrichthyinae and Goodeinae, and the relationship of Profundulus to the Goodeidae. All goodeine genera but Xenotoca were recovered as monophyletic. Many of the higher-level relationships within the group contradict the findings of previous studies based upon morphology. The rate of molecular change in COI (0.9% per Myr), calibrated with the fossil record and geological data, suggests an approximate age for the Goodeidae of 16.5 Myr. The majority of divergence within the Goodeinae appears to have occurred during the Miocene, with subsequent cladogenesis in the Pliocene and Pleistocene. Most recent speciation appears allopatric. River piracy, particularly involving the Rio Ameca basin, has played a significant role in the diversification of the Goodeinae. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 22 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000188958400005 L2 - FISHES CYPRINODONTIFORMES; ECOSYSTEM CONDITION; MITOCHONDRIAL-DNA; MEXICAN PLATEAU; WESTERN MEXICO; EVOLUTION; HISTORY; OSTEICHTHYES; SPECIATION; SEQUENCES SO - Molecular Phylogenetics and Evolution 2004 ;30(3):527-544 12822 UI - 6275 AU - Weber RJ AU - Gomez-Flores R AU - Smith JE AU - Martin TJ AD - Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, Peoria, IL 61605, USAUniv Autonoma Nuevo Leon, Inst Inmunol & Enfermedades Infecciosas, Dept Microbiol & Immunol, San Nicolas De Los Garza, NL, MexicoWake Forest Univ, Sch Med, Winston Salem, NC 27109, USAWeber, RJ, Univ Illinois, Coll Med, Dept Biomed & Therapeut Sci, 1 Illini Dr,POB 1649, Peoria, IL 61605 USA TI - Immune, neuroendocrine, and somatic alterations in animal models of human heroin abuse AB - We investigated immune, endocrine, and somatic alterations using two animal models of human heroin administration. In a heroin self-administration paradigm, we observed changes in immune function which suggest that the cycle of intermittent drug use is actually a stressor, which in turn not only exacerbates craving and drug-seeking behavior but also collaterally causes suppression of immune function and therefore susceptibility to disease. In another model of rats made physically dependent to heroin, we show that immune function is more broadly compromised, leading to evidence of infection, followed by chronic activation of innate immune function, cachexia, and weight loss. (C) 2003 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Immunology;Neurosciences U5 - J;Article AV - English IS - 0165-5728 UR - ISI:000188834000032 L2 - heroin abuse;immunomodulation;opportunistic infection;INJECTION-DRUG USERS; INDUCED IMMUNOSUPPRESSION; NITRIC-OXIDE; INFECTION; RATS; INVOLVEMENT; METHADONE; SYSTEM; TERM SO - Journal of Neuroimmunology 2004 ;147(1-2):134-137 12823 UI - 4469 AU - Wehncke EV AU - Valdez CN AU - Dominguez CA AD - UNAM, Lab Interacc Planta Anim, Dept ecol Evolut, Mexico City 04510, DF, MexicoUniv Alicante, Ctr Iberoamer Biodiversidad, E-03080 Alicante, SpainWehncke, EV, UNAM, Lab Interacc Planta Anim, Dept ecol Evolut, Apartado 70-275,Unidad Univ,Circuito Exterior, Mexico City 04510, DF, Mexico TI - Seed dispersal and defecation patterns of Cebus capucinus and Alouatta palliata: consequences for seed dispersal effectiveness AB - Primates are primary seed dispersers for many tropical tree species. Different species of primates vary considerably in ranging and feeding behaviour, seed processing, and in seed defecation patterns. Here we compare the role of two arboreal primate species, howlers (Alouatta palliata), and white-faced monkeys (Cebus capucinus) as seed dispersers in a tropical dry forest in Costa Rica. We found that Cebus produce smaller defecations, spend shorter times feeding per tree, have longer seed dispersal distances, and produce a more scattered pattern of seed deposition in the forest than Alouatta. In addition, Cebus moved more frequently between trees, and consumed fruits of more species than Alouatta. We examined the consequences of the contrasting defecation patterns produced by Cebus and Alouatta on the early seed fate of Acacia collinsii. We found that quantity, but not the identity (Cebus vs. Alouatta) of faecal material affected post-dispersal activity. Seeds in scattered faeces, sufficiently apart from each other (the common defecation pattern of white-faced monkeys), had higher short-term survival than seeds in clumped patterns of faeces (the pattern associated with Alouatta) MH - Mexico|Distrito Federal MH - Spain PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 8 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000223732900006 L2 - Acacia collinsii;Alouatta palliata;Cebus capucinus;Costa Rica;defecation patterns;dispersal effectiveness;post-dispersal;primates;seed dispersal;seed removal;tropical dry forest;TROPICAL RAIN-FOREST; DUNG BEETLES SCARABAEIDAE; INDIVIDUAL SPATIAL CHOICE; BROWN CAPUCHIN MONKEYS; WHITE-FACED MONKEYS; RED HOWLER MONKEYS; FORAGING GROUPS; FRENCH-GUIANA; LOS-TUXTLAS; HORSE DUNG SO - Journal of Tropical Ecology 2004 ;20():535-543 12824 UI - 3743 AU - Weigle JC AU - Luhrs CC AU - Chen CK AU - Perry WL AU - Mang JT AU - Nemer MB AU - Lopez GP AU - Phillips J AD - Los Alamos Natl Lab, Los Alamos, NM 87545, USAUniv Guadalajara, Dept Chem, Guadalajara 44480, Jalisco, MexicoUniv New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131, USAPhillips, J, Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545, USA TI - Generation of aluminum nanoparticles using an atmospheric pressure plasma torch AB - Nanoparticles of aluminum metal were generated by passing an aerosol of rnicrometer-scale (mean 50 mum) particles in argon through an atmospheric pressure plasma torch operated at less than 1000 W. A designed experiment was conducted to investigate the effects of plasma gas flow rate, aerosol gas flow rate, and applied power on the shape, size, and size distribution of the final particles. The size and shape of the metal particles were dramatically impacted by the operating parameters employed. At relatively low powers or at high powers and short residence times, virtually all the particles are spherical. Under other conditions, the particles had spherical heads, and virtually all had tails, some quite long. The particle size distributions also were influenced by the operating conditions. Under most conditions the size distributions were log-normal, consistent with growth by agglomeration. However, under some conditions, the population of particles above or below the mode was far too great to be consistent with a log-normal distribution. For example, the particle distributions tend to show an unusual concentration of very small particles at relatively short residence times and low aluminum feed rates. The distributions tend to show an unusual concentration of large particles at relatively long residence times and high aluminum feed rates. On the basis of the data collected, some simple models of the mechanism of nanoparticle formation were postulated which should be of value in future studies of the process MH - Mexico|Jalisco MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000225417200030 L2 - ULTRAFINE PARTICLES; CHARGE FLUCTUATIONS; SOLIDIFICATION; COAGULATION; REACTOR; GROWTH; IRON; GAS; CONDENSATION; OXIDATION SO - Journal of Physical Chemistry B 2004 ;108(48):18601-18607 12825 UI - 4040 AU - Weissbecker K AU - Nicolini H AU - Camarena B AU - Winstead D AD - Tulane Univ, Hlth Sci Ctr, New Orleans, LA 70118, USAChild Psychiat Hosp, Mexico City, DF, Mexico TI - Comparision of Mexican and Louisiana obsessive compulsive disorder (OCD) patients ascertained through a family study MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 0148-7299 UR - ISI:000223742600274 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2004 ;130B(1):72-72 12826 UI - 6412 AU - Weitz TA AU - Foster A AU - Ellertson C AU - Grossman D AU - Stewart FH AD - Univ Calif San Francisco, ANSIRH Program, Ctr Reprod Hlth Res & Policy, San Francisco, CA 94143, USAIbis Reprod Hlth, Cambridge, MA, USAPopulat Council, Mexico City, DF, MexicoWeitz, TA, Univ Calif San Francisco, ANSIRH Program, Ctr Reprod Hlth Res & Policy, 2356 Sutter St,Suite 200, San Francisco, CA 94143 USA TI - "Medical" and "surgical" abortion: rethinking the modifiers MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 6 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0010-7824 UR - ISI:000188295000015 SO - Contraception 2004 ;69(1):77-78 12827 UI - 4231 AU - Welsh O AU - Olazaran Z AU - Gomez M AU - Salas J AU - Berman B AD - UANL, Dept Dermatol, Univ Hosp, Monterrey, NL, MexicoUniv Miami, Miami, FL 33152, USAWelsh, O, UANL, Dept Dermatol, Univ Hosp, Col Mitras Ctr, Monterrey, NL, Mexico TI - Treatment of infantile hemangiomas with short-term application of imiquimod 5% cream AB - Ten patients with superficial infantile hemangiomas were treated with imiquimod 5% cream for up to 16 weeks. Four patients achieved complete clinical resolution, 3 had excellent improvement, one showed moderate improvement, and one patient did not respond to therapy. imiquimod may be an effective alternative for the treatment of superficial hemangiomas MH - Mexico|Nuevo Leon MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 9 U4 - Dermatology U5 - J;Article AV - English IS - 0190-9622 UR - ISI:000224286800020 L2 - IMMUNE-RESPONSE MODIFIER; CELLS SO - Journal of the American Academy of Dermatology 2004 ;51(4):639-642 12828 UI - 4534 AU - Wenseleers T AU - Hart AG AU - Ratnieks FLW AU - Quezada-Euan JJG AD - Univ Louvain, Inst Zool, Entomol Lab, B-3000 Louvain, BelgiumUniv Sheffield, Dept Anim & Plant Sci, Lab Apiculture & Social Insects, Sheffield S10 2TN, S Yorkshire, EnglandUniv Autonoma Yucatan, Fac Med Vet, Dept Apicultura, Merida, Yucatan, MexicoWenseleers, T, Univ Louvain, Inst Zool, Entomol Lab, Naamsestr 59, B-3000 Louvain, Belgium TI - Queen execution and caste conflict in the stingless bee Melipona beecheii AB - Caste conflict theory predicts that worker-destined individuals in insect colonies may try to develop as queens in order to gain greater direct reproduction. In situations where females can determine their own caste fate ('self-determination'), this is expected to lead to overproduction of queens. Theoretical predictions are supported by patterns of queen production in Melipona stingless bees. In Melipona, queens and workers are similar in size and develop in identical, mass-provisioned, sealed cells, a situation which permits self-determination. In line with predictions, many Melipona females, up to 16%, selfishly develop as queens. Although these observations fit the predictions of caste conflict theory, some of the underlying assumptions remain incompletely tested. In particular, whether immature females can actually determine their own caste fate and whether queen production is really excessive rather than just an insurance against accidental queen loss? Here we test these assumptions. Queens and workers in colonies of Melipona beecheii in Yucatan, Mexico, had the same dry mass, showing that queen development is not conditional on above-average food provisioning. This supports the assumption that individuals can completely control their caste fate. Observations of 30 introduced virgin queens in three colonies showed that queens were killed rapidly and had a life expectancy of just 47 h. A second method, using the number of virgin queens in natural colonies, also indicated a short life span, estimated at 27 h. Rapid and efficient culling of virgin queens supports the hypothesis that queen production is excessive and results from caste fate conflict. In addition, we provide, for the first time, detailed behavioural descriptions of queen killing in this species MH - Belgium MH - United Kingdom MH - Mexico|Yucatan PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 14 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0179-1613 UR - ISI:000223642800006 L2 - SOCIAL HYMENOPTERA; APIDAE; LONGEVITY; GYNES SO - Ethology 2004 ;110(9):725-736 12829 UI - 4132 AU - West JJ AU - Zavala MA AU - Molina LT AU - Molina MJ AU - San Martini F AU - Mcrae GJ AU - Sosa-Iglesias G AU - rriaga-Colina JL AD - Inst Mexicano Petr, Eje Cent Lazaro, Cardenas 152,Col San Bartolo, Mexico City 07730, DF, MexicoMIT, Dept Chem Engn, Cambridge, MA 02139, USAMIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139, USAWest, JJ, US EPA, OAR OPAR, 1200 Penn Ave NW,Mail Code 6103A, Washington, DC 20460 USA TI - Modeling ozone photochemistry and evaluation of hydrocarbon emissions in the Mexico City metropolitan area AB - [1] Emissions of volatile organic compounds (VOCs) and of CO are often underestimated, and correcting this underestimate is important for modeling ozone formation and sensitivity. The California Institute of Technology three-dimensional photochemical model is used to test the official emissions inventory for the Mexico City metropolitan area through a direct comparison of measured and modeled total nonmethane hydrocarbons (NMHCs) and CO. The model is applied to six 2-day periods during the IMADA measurement campaign of March 1997. When using emissions based on the official emissions inventory, the model significantly underestimates measurements of total NMHCs and of CO. A best fit to the measurements ( with lowest bias) is found when increasing emissions of CO and VOCs by factors of 2 and 3, respectively. Adjusting total emissions accordingly, the model produces good estimates of ozone and NOx, with average normalized biases over 6 days of 3% and 32%, respectively, and with better agreement during daytime hours. This agreement for ozone and NOx supports the suggestion that VOC and CO emissions are underestimated. Other uncertainties are analyzed, finding that while some uncertainties are important, none is individually significant enough to account for the discrepancy. Correcting the total emissions, the overall model performance is found to be adequate, particularly on 3 days, for the model to be used for analysis of control strategies. Using the results of a chemical mass balance identification of NMHC sources highlights sources that are more likely underestimated, but confidence in the appropriate correction to emissions from different sources is low and should be investigated further MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000224578500004 L2 - ozone photochemistry;Mexico City;nonmethane hydrocarbon emissions;air quality modeling;urban air pollution;VOLATILE ORGANIC-COMPOUNDS; CHEMICAL MASS-BALANCE; URBAN AIR-POLLUTION; CARBON-MONOXIDE; SOURCE APPORTIONMENT; QUALITY; BASIN; CALIFORNIA; ATMOSPHERE; INVENTORY SO - Journal of Geophysical Research-Atmospheres 2004 ;109(D19): 12830 UI - 4630 AU - Whorley JR AU - varez-Castaneda S AU - Kenagy GJ AD - Univ Washington, Burke Museum, Seattle, WA 98195, USACtr Invest Biol Noroeste, La Paz, Baja Calif Sur, MexicoUniv Washington, Dept Biol, Seattle, WA 98195, USAWhorley, JR, Univ Washington, Burke Museum, Seattle, WA 98195, USA TI - Genetic structure of desert ground squirrels over a 20-degree-latitude transect from Oregon through the Baja California peninsula AB - The genetic structure of populations over a wide geographical area should reflect the demographic and evolutionary processes that have shaped a species across its range. We examined the population genetic structure of antelope ground squirrels (Ammospermophilus leucurus) across the complex of North American deserts from the Great Basin of Oregon to the cape region of the Baja California peninsula. We sampled 73 individuals from 13 major localities over this 2500-km transect, from 43 to 22degrees north. Our molecular phylogeographical analysis of 555 bp of the mitochondrial cytochrome b gene and 510 bp of the control region revealed great genetic uniformity in a single clade that extends from Oregon to central Baja California. A second distinct clade occupies the southern half of the peninsula. The minimal geographical structure of the northern clade, its low haplotype diversity and the distribution of pairwise differences between haplotypes suggest a rapid northward expansion of the population that must have followed a northward desert habitat shift associated with the most recent Quaternary climate warming and glacial retreat. The higher haplotype diversity within the southern clade and distribution of pairwise differences between haplotypes suggest that the southern clade has a longer, more stable history associated with a southern peninsular refugium. This system, as observed, reflects both historical and contemporary ecological and evolutionary responses to physical environmental gradients within genetically homogeneous populations MH - Mexico|Baja California Sur MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 0962-1083 UR - ISI:000223291200018 L2 - adaptation;demography;geographical evolution;historical biogeography;mitochondrial DNA;phylogeography;HUMAN MITOCHONDRIAL-DNA; POPULATION-GROWTH; COMPARATIVE PHYLOGEOGRAPHY; DEMOGRAPHIC PARAMETERS; MOLECULAR SYSTEMATICS; NATURAL-POPULATIONS; SEGREGATING SITES; EVOLUTION; SEQUENCES; SELECTION SO - Molecular Ecology 2004 ;13(9):2709-2720 12831 UI - 2953 AU - Wiebe S AU - Tellez-Zenteno JF AU - Matijevic S AD - London Hlth Sci Ctr, London, ON, CanadaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, Mexico TI - The comorbidity of epilepsy: A Canadian population health survey MH - Canada MH - Mexico|Distrito Federal PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000224420100315 SO - Epilepsia 2004 ;45():106-106 12832 UI - 3612 AU - Wieczorek K AU - Wojciechowski W AD - Silesian Univ, Fac Biol & Environm Protect, Dept Zool, PL-40007 Katowice, PolandUNAM, Mexico City 04510, DF, MexicoWieczorek, K, Silesian Univ, Fac Biol & Environm Protect, Dept Zool, Bankowa 9, PL-40007 Katowice, Poland TI - The systematic position of Chaitophorinae (Hemiptera, Aphidoidea) in the light of anatomy research AB - The structure of the male reproductive system of 14 Chaitophorine species is discussed: Chaitophorus capreae, C. leucomelas, C. nassonovi, C. populeti, C. populialbae, C. salicti, C. salijaponicus niger, C. tremulae, C. truncatus, C. vittelinae, Sipha maydis, Periphyllus aceris, P. coracinus, P. lyropictus. All species, except Sipha maydis, which lives on Poacea (grasses), feed on trees of the families Aceraceae (maples) and Salicaceae (poplars and willows). On the basis of longitudinal sections, cross-sections (paraffin method) and total preparation, the following elements in the structure of the male reproductive system have been examined: the number of testis follicles and the stage of the spermatogenesis; the connection of follicles and vasa deferentia, the position and the histological structure of the wall of vasa deferentia; and the development accessory glands and ejaculatory duct. These characters were then used to supplement morphological data in order to verify the taxonomic position of Chaitophorinae MH - Mexico|Distrito Federal MH - Poland PB - STENSTRUP: APOLLO BOOKS RP - NOT IN FILE U3 - TC 2 U4 - Evolutionary Biology;Entomology U5 - J;Article AV - English IS - 1399-560X UR - ISI:000225899600007 L2 - HOMOPTERA; APHIDIDAE SO - Insect Systematics & Evolution 2004 ;35(3):317-327 12833 UI - 5505 AU - Wilcox TP AU - De Leon FJG AU - Hendrickson DA AU - Hillis DM AD - Univ Texas, Sect Integrat Biol, Austin, TX 78712, USAUniv Texas, Ctr Computat Biol & Bioinformat, Austin, TX 78712, USAInst Tecnol Cd Victoria, Lab Biol Integrativa, Cd Victoria 87010, Tamaulipas, MexicoUniv Texas, Texas Mem Museum, Austin, TX 78758, USAHillis, DM, Univ Texas, Sect Integrat Biol, Austin, TX 78712, USA TI - Convergence among cave catfishes: long-branch attraction and a Bayesian relative rates test AB - Convergence has long been of interest to evolutionary biologists. Cave organisms appear to be ideal candidates for studying convergence in morphological, physiological, and developmental traits. Here we report apparent convergence in two cave-catfishes that were described on morphological grounds as congeners: Prietella phreatophila and Prietella lundbergi. We collected mitochondrial DNA sequence data from 10 species of catfishes, representing five of the seven genera in Ictaluridae, as well as seven species from a broad range of siluriform outgroups. Analysis of the sequence data under parsimony supports a monophyletic Prietella. However, both maximum-likelihood and Bayesian analyses support polyphyly of the genus, with P. lundbergi sister to Ictalurits and P. phreatophila sister to Ameiurus. The topological difference between parsimony and the other methods appears to result from long-branch attraction between the Prietella species. Similarly, the sequence data do not support several other relationships within Ictaluridae supported by morphology. We develop a new Bayesian method for examining variation in molecular rates of evolution across a phylogeny. (C) 2003 Elsevier Inc. All rights reserved MH - Mexico|Tamaulipas MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 18 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000221443400024 L2 - GENUS PRIETELLA SILURIFORMES; PHYLOGENETIC-RELATIONSHIPS; ICTALURIDAE; LIKELIHOOD; BLIND; SUBSTITUTION; BOOTSTRAP; EVOLUTION; SEQUENCE; SUPPORT SO - Molecular Phylogenetics and Evolution 2004 ;31(3):1101-1113 12834 UI - 4192 AU - Williams F AU - Gorodezky C AU - Middleton D AD - Belfast City Hosp, No Ireland Reg Histocompatibil & Immunogenet Lab, Belfast BT9 7AD, Antrim, North IrelandInst Nacl Diagnost & Referencia Epidemiol, Dept Immunogenet, Mexico City, DF, MexicoWilliams, F, Belfast City Hosp, No Ireland Reg Histocompatibil & Immunogenet Lab, Belfast BT9 7AD, Antrim, North Ireland TI - HLA-A and -B alleles and cytokine polymorphism frequencies in a Mestizo population from Mexico MH - Mexico|Distrito Federal MH - United Kingdom PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Immunology U5 - J;Article AV - English IS - 0198-8859 UR - ISI:000224407100078 SO - Human Immunology 2004 ;65(9-10):1007-1011 12835 UI - 2854 AU - Williams K AU - Stern MP AU - Gonzalez-Villalpando C AD - Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78284, USAInst Mexicano Seguro Socail, Mexico City, DF, MexicoCtr Estudios Diabet, Mexico City, DF, MexicoWilliams, K, Univ Texas, Hlth Sci Ctr, Dept Med, Div Clin Epidemiol, San Antonio, TX 78284 USA TI - Secular trends in obesity in Mexico city and in San Antonio AB - The San Antonio Heart Study - conducted from 1979 to 1996 - and the Mexico City Diabetes Study - conducted from 1990 to 1999 - both show significant secular increases in obesity as indicated by mean body mass index values and proportions of the populations who were obese or overweight. The increase in obesity accounts for an estimated 28% of the increase in the incidence of diabetes in San Antonio. This increase in the incidence of diabetes occurred across all age groups (25 - 34, 35 - 44, 45 - 54, and 55 - 64). Thus the generational acceleration of diabetes, expected as a result of the greater tendency for people whose mothers were diabetic when pregnant to become diabetic themselves, may not be as severe as would be expected had the increases in diabetes incidence occurred disproportionately more among women prior to or during their child-bearing years. Key words: obesity, diabetes, trends (c) 2004 International Life Sciences Institute MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: INT LIFE SCIENCES INST NORTH AMERICA RP - NOT IN FILE U3 - TC 4 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0029-6643 UR - ISI:000227612100015 L2 - obesity;diabetes;trends;BODY-MASS INDEX; FAT DISTRIBUTION; OVERWEIGHT; PREVALENCE; CHILDREN; DETERMINANTS; POPULATION; FINLAND; ADULTS SO - Nutrition Reviews 2004 ;62(7):S158-S162 12836 UI - 5628 AU - Williams T AU - Cisneros J AU - Penagos DI AU - Valle J AU - Tamez-Guerra P AD - El Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Publ Navarra, Depto Prod Agraria, Pamplona 31006, SpainUniv Autonoma Nuevo Leon, Fac Ciencias Biol, San Nicolas De Los Garza 66451, NL, MexicoWilliams, T, El Colegio Frontera Sur, Apdo Postal 36, Tapachula 30700, Chiapas, Mexico TI - Ultralow rates of spinosad in phagostimulant granules provide control of Spodoptera frugiperda (Lepidoptera : noctuidae) in maize AB - Field trails in 2002 and 2003 were performed to determine the efficacy of maize flour-based granular formulations with ultralow rates of the naturally derived insecticide spinosad (0.1, 0.3, and 1.0 g [AI] /ha), for control of Spodoptera frugiperda (J.E. Smith) in maize, Zea mays L., in southern Mexico. Spinosad formulations were compared with a chemical standard, a commercial granular formulation of chlorpyrifos (150 g [AI] /ha). In both years, application of spinosad resulted in excellent levels of control, indicated by the number of living S. frugiperda larvae recovered from experimental plots. The efficacy of spinosad applied at 0.3 and 1.0 g (AI) /ha was very similar to that of chlorpyrifos. Natural reinfestation caused S. frugiperda numbers in insecticide treated plots to return to Values similar to the control treatment by 10-15 d postapplication. Many spinosad-intoxicated larvae collected in the field (lied later in the laboratory in 2002, but not in 2003. Percentage mortality due to parasitoid emergence did not differ in any treatment in either field trial. The number of parasitoids that emerged from S.frugiperda collected in each treatment was significantly reduced after application of spinosad (all rates) or chlorpyrifos due to a reduction in the number of host larvae. Parasitoid numbers returned to control values by 9-15 d postapplication in all treatments. The most prevalent parasitoid was the braconid Chelonus insularis Cresson, which represented approximate to80% of emerging parasitoids in both years. We conclude that appropriate formulation technology can greatly enhance the performance of this naturally derived, biorational insecticide MH - Mexico|Chiapas MH - Mexico|Nuevo Leon MH - Spain PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000221038400034 L2 - spinosad;fall armyworm;feeding stimulants;parasitoids;Chelonus insularis;FALL ARMYWORM LEPIDOPTERA; INSECT NATURAL ENEMIES; BACILLUS-THURINGIENSIS; FORMULATIONS; HYMENOPTERA; BIOINSECTICIDE; NICARAGUA; PYRALIDAE; AMERICA; IMPACT SO - Journal of Economic Entomology 2004 ;97(2):422-428 12837 UI - 4913 AU - Willms K AU - Robert L AU - Jimenez JA AU - Everhart M AU - Kuhn RE AD - UNAM, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoKansas State Univ, Div Biol, Manhattan, KS, USAWake Forest Univ, Dept Biol, Winston Salem, NC 27109, USAWillms, K, UNAM, Fac Med, Dept Microbiol & Parasitol, Ciudad Univ,Edificio A,Primer Piso,Circuito Escol, Mexico City 04510, DF, Mexico TI - Ultrastructure of spermiogenesis and the spermatozoon in Taenia crassiceps strobilae WFU strain (Cestoda, Cyclophyllidea, Taeniidae) from golden hamsters AB - Strobilae from Taenia crassiceps (WFU strain) were obtained from outbred hamsters (Mesocricetus auratus) by feeding them viable metacestodes maintained by intraperitoneal passage in female Balb/c mice. Mature and gravid proglottids from strobilae were recovered from hamster intestines and fixed for light and electron microscopy. By light microscopy, the expected structure of taeniid proglottids was observed. Ultrastructural analysis of ten proglottids showed that testicular follicles and vas deferens contained filiform spermatids, with a single axoneme, and an elongated helicoidal nucleus inserted between the axoneme and the spiraled cortical microtubules. At the apical cone, a single crest-like body was found and mature spermatids also exhibited transverse intracytoplasmic walls. The morphology and characters of the spermatids in T. crassiceps conform to type III spermiogenesis, which has been described in other taeniids MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 10 U4 - Parasitology U5 - J;Article AV - English IS - 0932-0113 UR - ISI:000222691300002 L2 - INTESTINAL PARASITE; IMMUNE-RESPONSE; CYSTICERCOSIS; DIPYLIDIIDAE; SENEGAL SO - Parasitology Research 2004 ;93(4):262-267 12838 UI - 3876 AU - Willmsa K AU - Shoemaker CB AU - Skelly PJ AU - Landa A AD - Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoTufts Univ, Sch Vet Med, Dept Biomed Sci, Grafton, MA 01536, USALanda, A, Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Edificio,A,2 Piso Ciudad Univ, Mexico City 04510, DF, Mexico TI - Cloning and expression of a Na+, K+-ATPase alpha-subunit from Taenia solium (TNaK1 alpha) AB - The Na+, K+-ATPase are membrane-associated enzymes that transport Na+ and K+ across the membrane generating chemical and electrical gradients, essential to maintain the resting potential for the excitation of myocytons and neurons and for transport of nutrients. The cDNA encoding a full-length isoform of Taenia solium Na+, K+-ATPase alpha-subunit (TNaK1alpha) was isolated from a cysticercal cDNA library. TNaK1alpha has 1014 amino acids and a predicted molecular mass of 11 1,989Da. The protein displays strong sequence homology and conserved motifs typical of Na+, K+-ATPase alpha-subunits. Northern and Southern hybridizations reveal a TNaK1alpha mRNA of about 3.7 kb, which is encoded by a single gene, Polyclonal antibodies raised against a synthetic peptide corresponding to the NH2-terminal sequence of TNaK1alpha recognized a 100-kDa polypeptide in the membrane fraction of adult and larval stages of T solium and other Taenia species. Immunolocalization studies using the same antibodies revealed that the TNaK1 is preferentially localized in muscle cells and protonephridial ducts, and in small quantities in the tegument of T solium cysticerci. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Parasitology U5 - J;Article AV - English IS - 0166-6851 UR - ISI:000225128100009 L2 - Na+,K+-ATPase;Na pump;alpha-subunit;cDNA;Taenia;muscle cells;SCHISTOSOMA-MANSONI; BETA-SUBUNIT; NA,K-ATPASE; MEMBRANE; LOCALIZATION; PURIFICATION; TRANSPORT SO - Molecular and Biochemical Parasitology 2004 ;138(1):79-82 12839 UI - 5103 AU - Wilman RJ AU - Jarvis MJ AU - Rottgering HJA AU - Binette L AD - Univ Durham, Dept Phys, Durham DH1 3LE, EnglandDept Phys, Oxford OX1 3LE, EnglandSterrewacht Leiden, NL-2300 RA Leiden, NetherlandsUniv Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoWilman, RJ, Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, England TI - HI in the protocluster environment at z > 2: absorbing haloes and the Ly alpha forest AB - We present VLT-UVES echelle spectra of the Lyalpha emission and absorption in five radio galaxies at redshifts z = 2.55-4.1. Together with data from our pilot study, we have a sample of seven such systems with radio source sizes similar to1-90 kpc with which to address the origin of the absorbing gas. Echelle resolution again reveals that some systems with N-H1 > 10(18) cm(-2) in lower-resolution data in fact consist of several weaker absorbers with N-H1 < 10(15) cm(-2). We identify two groups of HI absorbers: strong absorbers with N-H1 &SIME; 10(18)-10(20) cm(-2) and weaker systems with N-H1 &SIME; 10(13)-10(15) cm(-2). There is none at intermediate N-H1. The strong absorbers may be a byproduct of massive galaxy formation or could instead represent material cooling behind the expanding bow shock of the radio jet, as simulated by Krause. New observations are required to discriminate between these possibilities. We argue that the weaker absorbers with N-H1 &SIME; 10(13)-10(15) cm(-2) are part of the Lyα forest, as their rate of incidence is within a factor of 2-4 of that in the intergalactic medium at large. Such column densities are consistent with models of a multiphase proto-intracluster medium at z > 2 MH - United Kingdom MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 12 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000222261500034 L2 - galaxies : active;galaxies : haloes;galaxies : high-redshift;quasars : absorption lines;quasars : emission lines;REDSHIFT RADIO GALAXIES; LYMAN-BREAK GALAXIES; K-Z RELATION; ACTIVE GALACTIC NUCLEI; MS 1512-CB58; INTERSTELLAR-MEDIUM; STAR-FORMATION; FIND OBJECTS; CO EMISSION; GAS SO - Monthly Notices of the Royal Astronomical Society 2004 ;351(3):1109-1119 12840 UI - 4962 AU - WinklerPrins AMGA AU - Barrera-Bassols N AD - Michigan State Univ, Dept Geog, E Lansing, MI 48824, USAUNAM, Inst Geog, Mexico City, DF, MexicoWinklerPrins, AMGA, Michigan State Univ, Dept Geog, 315 Nat Sci Bldg, E Lansing, MI 48824 USA TI - Latin American ethnopedology: A vision of its past, present, and future AB - Ethnopedology is the study of local knowledge of soil and land management in an ecological perspective. It is an emerging hybrid discipline that is a component of ethnoecology and stands to offer much for land-based studies. This paper reviews the field of ethnopedology in Latin America and compares some of the many case studies from that region. Various literature sources are considered, including the ethnographical, ethnohistorical, archaeological, geographical, agronomic, ethnoecological, and development studies. Our review invokes the theory of ethnoecology that focuses on the linkages between kosmos (beliefs and symbolic representations), corpus (environmental knowledge), and praxis (the set of practical operations through which the material appropriation of nature takes place) of local land-users. The main topics covered are the ethnohistorical and archaeological evidence of ethnopedology, local soil and land classification, local land management systems, local perceptions and beliefs of soil and land resources, and local soil fertility management. After analysing past and present research trends, recommendations are given on how ethnopedological studies can contribute to enhance sustainable land use and management in Latin America MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 4 U4 - Agriculture, Multidisciplinary;History & Philosophy Of Science;Sociology U5 - J;Article AV - English IS - 0889-048X UR - ISI:000222704800005 L2 - ethnoecology;ethnopedology;local/indigenous soil knowledge;Latin America;soil fertility management;sustainable land management;LOCAL SOIL KNOWLEDGE; SUSTAINABLE LAND MANAGEMENT; ANCIENT AGRICULTURAL SOILS; INDIGENOUS KNOWLEDGE; SOUTHERN PERU; MEXICO; CONSERVATION; AMAZONIA; CHIAPAS; FOREST SO - Agriculture and Human Values 2004 ;21(2-3):139-156 12841 UI - 3732 AU - Wojtczak L AU - Zasada I AU - Sukiennicki A AU - Alvarado FLC AD - Univ Lodz, Dept Solid State Phys, PL-90131 Lodz, PolandInst Polytecn Natl, Escuela Super Fis & Matemat, Mexico City, DF, MexicoWarsaw Univ Technol, Fac Phys, PL-00661 Warsaw, PolandWojtczak, L, Univ Lodz, Dept Solid State Phys, PL-90131 Lodz, Poland TI - Surface melting and surface disordering in binary alloy thin films AB - An interdependence between the surface melting and the surface disordering observed in binary alloy thin films is considered in the context of their mutual relations. The present discussion allows us to extend the diagram of phase transitions to the case when the crystallinity parameter behavior influences the local concentration profiles and the lattice order parameter describing the alloy structure. In particular, the surface-induced disorder is described when the crystal structure is preserved and, in contrast, when the surface melting is expected for partially disordered samples MH - Mexico|Distrito Federal MH - Poland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000225477800140 L2 - INTERFACE DELOCALIZATION TRANSITIONS; PHASE-TRANSITIONS; SYSTEMS; CRYSTAL; SOLIDS; LIQUID SO - Physical Review B 2004 ;70(19): 12842 UI - 6444 AU - Wong-Chew RM AU - Islas-Romero R AU - Garcia-Garcia MD AU - Beeler JA AU - Audet S AU - Santos-Preciado JI AU - Gans H AU - Lew-Yasukawa L AU - Maldonado YA AU - Arvin AM AU - Valdespino-Gomez JL AD - UNAM, Fac Med, Dept Expt Med, Mexico City 06726, DF, MexicoCtr Nacl Salud Infancia & Adolescencia, Secretaria Salud, Mexico City, DF, MexicoInst Nacl Salud Publ, Cuernavaca, Morelos, MexicoStanford Univ, Sch Med, Stanford, CA 94305, USAUS FDA, Rockville, MD 20857, USAWong-Chew, RM, UNAM, Fac Med, Dept Expt Med, Dr Balmis 148,Colonia Doctores, Mexico City 06726, DF, Mexico TI - Induction of cellular and humoral immunity after aerosol or subcutaneous administration of Edmonston-Zagreb measles vaccine as a primary dose to 12-month-old children AB - Infants were immunized by aerosol (10(3.6) plaque-forming units [pfu]/dose) or subcutaneous (sc) (10(4.27) pfu/dose) administration of Edmonston-Zagreb measles vaccine. Measles-specific T cell proliferative responses with a stimulation index of greater than or equal to3 developed in 72% of children given aerosol-administered vaccine, compared with 87% given sc-administered vaccine (P = .06). Seroconversion rates were 90% after aerosol-administered vaccine and 100% after sc-administered vaccine (P = .01), and measles geometric mean titers were 237 milli-international units (mIU) (95% confidence interval [CI], 146-385 mIU) and 487 mIU (95% CI, 390-609 mIU) in each group, respectively (P = .01). Measles-specific T and B cell responses were weaker after aerosol than after sc vaccination, indicating a need to use a higher aerosol dose to achieve optimal immunogenicity MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0022-1899 UR - ISI:000188097900012 L2 - RANDOMIZED-TRIAL; MMR VACCINATION; RESPONSES; ANTIBODY; INFANTS; SCHOOLCHILDREN; ROUTES SO - Journal of Infectious Diseases 2004 ;189(2):254-257 12843 UI - 6359 AU - Woudt PA AU - Kraan-Korteweg RC AU - Cayatte V AU - Balkowski C AU - Felenbok P AD - Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South AfricaUniv Guanajuato, Dept Astron, Guanajuato 36000, MexicoObserv Paris, CNRS, GEPI, F-92195 Meudon, FranceUniv Paris 07, F-92195 Meudon, FranceObserv Paris, CNRS, LUTH, F-92195 Meudon, FranceWoudt, PA, Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South Africa TI - Extragalactic large-scale structures behind the southern Milky Way - IV. Redshifts obtained with MEFOS AB - As part of our efforts to unveil extragalactic large-scale structures behind the southern Milky Way, we here present redshifts for 764 galaxies in the Hydra / Antlia, Crux and Great Attractor region (266degrees less than or equal to l less than or equal to 338degrees, \b\ less than or similar to 10degrees), obtained with the Meudon-ESO Fibre Object Spectrograph ( MEFOS) at the 3.6-m telescope of ESO. The observations are part of a redshift survey of partially obscured galaxies recorded in the course of a deep optical galaxy search behind the southern Milky Way (Kraan-Korteweg 2000; Woudt & Kraan-Korteweg 2001). A total of 947 galaxies have been observed, a small percentage of the spectra (N = 109, 11.5%) were contaminated by foreground stars, and 74 galaxies (7.8%) were too faint to allow a reliable redshift determination. With MEFOS we obtained spectra down to the faintest galaxies of our optical galaxy survey, and hence probe large-scale structures out to larger distances (v less than or similar to 30 000 km s(-1)) than our other redshift follow-ups using the 1.9-m telescope at the South African Astronomical Observatory (Kraan-Korteweg et al. 1995; Fairall et al. 1998; Woudt et al. 1999) and the 64-m Parkes radio telescope (Kraan-Korteweg et al. 2002). The most distinct large-scale structures revealed in the southern Zone of Avoidance are discussed in context to known structures adjacent to the Milky Way MH - France MH - Mexico|Guanajuato MH - South Africa PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000188720500003 L2 - catalogs;surveys;ISM : dust, extinction;galaxies : distances and redshifts;clusters : individual : ACO 3627;large-scale structure of Universe;GREAT-ATTRACTOR REGION; HYDRA ANTLIA; GALAXY CLUSTER; CATALOG; SAAO; EXTENSION; UNIVERSE; DYNAMICS; SEARCH; CRUX SO - Astronomy & Astrophysics 2004 ;415(1):9-18 12844 UI - 3763 AU - Wright A AU - Poli R AU - Stephens C AU - Langdon WB AU - Pulavarty S AD - Univ Montana, Missoula, MT 59812, USA. Univ Essex, Dept Comp Sci, Colchester CO4 3SQ, Essex, England. Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. Univ Coll London, London, England TI - An estimation of distribution algorithm based on maximum entropy AB - Estimation of distribution algorithms (EDA) are similar to genetic algorithms except that they replace crossover and mutation with sampling from an estimated probability distribution. We develop a framework for estimation of distribution algorithms based on the principle of maximum entropy and the conservation of schema frequencies. An algorithm of this type gives better performance than a standard genetic algorithm (CA) on a number of standard test problems involving deception and epistasis (i.e. Trap and NK) MH - United Kingdom MH - Mexico|Distrito Federal MH - USA T3 - GENETIC AND EVOLUTIONARY COMPUTATION GECCO 2004Lecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticle1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBBD76 AV - English IS - 0302-9743 UR - ISI:000225040600030 SO - 2004 ;():343-354 12845 UI - 3848 AU - Xia XC AU - Reif JC AU - Hoisington DA AU - Melchinger AE AU - Frisch M AU - Warburton ML AD - Chinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Beijing 100081, Peoples R ChinaCIMMYT, Int Appl Biotechnol Ctr, Mexico City 06600, DF, MexicoUniv Hohenheim, Inst Plant Breeding Seed Sci & Populat Genet, D-70593 Stuttgart, GermanyWarburton, ML, Chinese Acad Agr Sci, Inst Crop Breeding & Cultivat, Zhongguancun S St 12, Beijing 100081, Peoples R China TI - Genetic diversity among CIMMYT maize inbred lines investigated with SSR markers: I. Lowland tropical maize AB - Detailed knowledge about the genetic diversity among germplasm is important for hybrid maize (Zea mays L.) breeding. The objectives of our study were to (i) investigate the genetic diversity among tropical lowland inbred lines and (ii) delimit heterotic groups in this germplasm. Simple sequence repeat (SSR) analysis of 79 markers distributed uniformly throughout the maize genome was performed for 155 tropical lowland inbred lines from the International Maize and Wheat Improvement Center (CIMMYT). Inbred lines were extracted from 60 broad-based populations and pools with mixed origin. We observed an average of 7.4 alleles per marker with a range from 2 to 18. The polymorphic information content (PIC) of the 79 SSRs ranged from 0.13 to 0.87, with an average of 0.60. Cluster analysis of the tropical yellow and white lines revealed a lack of structure within this germplasm, which can be explained by the mixed origin of the populations used to extract these lines and the specific choice of testers for reciprocal recurrent selection (RRS). An SSR analysis can support the choice of representative testers for evaluating inbred lines in such broadbased populations. Thus, a more complete exploitation of the outstanding flint-dent heterotic pattern is possible MH - Germany MH - Mexico|Distrito Federal MH - Peoples R China PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 6 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000225153000053 L2 - LENGTH-POLYMORPHISMS; COMBINING ABILITY; HETEROSIS; POPULATIONS; GERMPLASM; PATTERNS; UTILITY; RFLPS SO - Crop Science 2004 ;44(6):2230-2237 12846 UI - 5538 AU - Ximello-Quiebras JN AU - Contreras-Puente G AU - guilar-Hernandez J AU - Sanatana-Rodriguez G AU - Readigos AAC AD - Inst Politecn Nacl, Escuela Super Fis & Matemat, Mexico City 07738, DF, MexicoUniv La Habana, Fac Fis, IMRE, Havana 10400, CubaContreras-Puente, G, Inst Politecn Nacl, Escuela Super Fis & Matemat, Edificio 9, Mexico City 07738, DF, Mexico TI - Physical properties of chemical bath deposited CdS thin films AB - Cadmium sulfide films of different thicknesses were deposited by chemical bath deposition (CBD) from a bath containing cadmium chloride, ammonium chloride, ammonium hydroxide and thiourea. The XRD patterns show that the films have a hexagonal phase with a preferential (002) orientation. The photoluminescence spectra show a defect structure, characteristics of the US films obtained by CBD. The electrical behavior in dark and under illumination, the optical properties and the band gap value reported in this work is in agreement with that reported in the literature. (C) 2004 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Energy & Fuels;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0927-0248 UR - ISI:000221289000025 L2 - chemical bath deposition;CdS;thin films SO - Solar Energy Materials and Solar Cells 2004 ;82(1-2):263-268 12847 UI - 5598 AU - xis-Arroyo J AU - Mateu J AD - Univ Jaume 1, Dept Math, E-12071 Castellon, SpainIPN Unidad Merida, Ctr Invest & Estudios Avanzados, Merida 97310, Yucatan, MexicoMateu, J, Univ Jaume 1, Dept Math, Campus Riu Sec, E-12071 Castellon, Spain TI - Spatio-temporal modeling of benthic biological species AB - The spatial and temporal distribution of the number of benthic species located in an important area under ecological stress (Puerto CALICA, Quintana Roo, Mexico) is analyzed by means of Gaussian Spatial Linear Mixed Models. Following a model-based approach we derive spatial predictions taking into account temporal variations between May 1996 and June 1999. The proposed models were evaluated in terms of their ability to detect the underlying spatial structure for further interpolation. Uncertainty in the prediction could be evaluated by using the Bayesian paradigm. The results can be used as a guide for further environmental management policies in the region. (C) 2004 Published by Elsevier Ltd MH - Mexico|Yucatan MH - Spain PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Environmental Studies U5 - J;Article AV - English IS - 0301-4797 UR - ISI:000221146200008 L2 - Bayesian;ordinary and universal kriging;benthic biological species;environmental impact management;Gaussian spatial linear mixed model SO - Journal of Environmental Management 2004 ;71(1):67-77 12848 UI - 3849 AU - Xu SS AU - Friesen TL AU - Mujeeb-Kazi A AD - USDA, ARS, No Crop Sci Lab, Fargo, ND 58105, USACIMMYT, Mexico City 06600, DF, MexicoXu, SS, USDA, ARS, No Crop Sci Lab, POB 5677, Fargo, ND 58105, USA TI - Seedling resistance to tan spot and Stagonospora nodorum blotch in synthetic hexaploid wheats AB - Tan spot and Stagonospora nodorum blotch (SNB), caused by fungi Pyrenophora tritici-repentis (Died.) Drechs. fanamorph: Drechslera tritici-repentis (Died.) Shoem.] and Phaeosphaeria nodorum (E. Mwler) Hedjaroude [anamorph: Stagonospora nodorum (Berk.) Castellani & Germano], respectively, are two important foliar diseases of wheat (Triticum aestivum L.). The objective of this study was to evaluate the two sets of elite synthetic hexaploid wheat (SHW, 2n = 6x = 42, AABBDD) lines (Elite 1 and Elite 2) developed at the International Maize and Wheat Improvement Center (CIMMYT) for their seedling resistance to P. tritiei-repentis and P. nodorum. In this study, 120 elite CIMMYT SHW lines and their durum wheat IT. turgidum subsp. durum (Desf.) Husn.] parents were inoculated with P. tritici-repentis race 1 and a standard field isolate (Sn2000) of P. nodorum, respectively, in two separate three-replication experiments. The seedling reactions to P. tritici-repentis and P. nodorum were evaluated 7 and 10 d postinoculation, respectively. The plant leaves were also infiltrated with the host-selective toxin (HST) Ptr ToxA at the two-leaf stage and sensitivity was evaluated 3 to 4 d postinfiltration. As expected, most SHW lines were the same as their durum parents in their sensitivity to Ptr ToxA because the sensitivity locus Tsn1 is located on chromosome 5B. However, a few of the synthetics were different from their durum parents, suggesting that heterozygosity and heterogeneity might exist in some of the SHW lines and durum parents. The toxin sensitivity significantly increased susceptibility of the synthetics to tan spot but had no significant effects on durum parents. The data showed that 56 (46.7%) and 36 (30.0%) SHW lines were resistant to tan spot and SNB, respectively, whereas resistance was almost absent in the durum parents. These results suggest that the elite CIMMYT synthetics are an excellent source of resistance to tan spot and SNB and should be useful in developing new resistant cultivars and adapted germplasm in bread wheat MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 10 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000225153000054 L2 - PYRENOPHORA-TRITICI-REPENTIS; NECROSIS-INDUCING TOXIN; SEPTORIA-NODORUM; WINTER-WHEAT; SENSITIVITY; GENE; LEAF SO - Crop Science 2004 ;44(6):2238-2245 12849 UI - 4702 AU - Xueref I AU - Gerbig C AU - Fridlind A AU - Lin JC AU - Wofsy SC AU - Daube BC AU - Ackerman AS AU - Smith JE AU - Sayres D AU - Vellovic J AU - Baumgardner DG AU - Wang D AU - Weinstock E AU - Andrews AE AU - Gottlieb EW AU - Anderson JG AD - Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138, USANASA, Ames Res Ctr, Moffett Field, CA 94035, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoNASA, Langley Res Ctr, Hampton, VA 23681, USANOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80305, USAXueref, I, CEA, Lab Sci Climat & Environm, Bat 711 Pte 2,Orme Merisiers, F-91191 Gif Sur Yvette, France TI - Combining a receptor-oriented framework for tracer distributions with a cloud-resolving model to study transport in deep convective clouds: Application to the NASA CRYSTAL-FACE campaign AB - Quantitative models of deep convection play a central role to improve understanding of weather, trace gas distributions, and radiative regime of the upper troposphere. Cloud-resolving models of deep convection are useful tools to simulate relevant processes. Observations of tracers such as CO2 can provide critical constraints on mass transport within these models. However, such measurements do not span the entire four-dimensional domain in space and time. We introduce a new method to improve tracer constraints on such models, combining a Receptor-Oriented Atmospheric Modeling (ROAM) framework with airborne and ground-based CO2 data. We illustrate the application of ROAM in generating initial and boundary conditions of CO2 for cloud-resolving model simulations, for a case study in the CRYSTAL-FACE campaign. Observations and model results were compared for CO2 profiles from the surface up to 16 km, inside and outside of a deep convective cloud. ROAM generated concentration fields that agreed within 0.5 ppm (1sigma) of observations outside the cloud. When ROAM-derived initial and boundary CO2 concentrations were fed to a state-of-the-art cloud-resolving model ( DHARMA), the combined modeling system successfully reproduced observed concentration differences, 0.2 - 0.8 ppm, between in-cloud and out-of-cloud air at 9 similar to 14 km. Results suggest that similar to 25% of air at 14 km was lifted through the convective system from the PBL. This study demonstrates the potential of the receptor-oriented framework to constrain redistribution of air within convective systems using CO2, and it points to the need for better coordinated tracer measurements in future field missions MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000223183700001 L2 - REGIONAL-SCALE FLUXES; ATMOSPHERIC OBSERVATIONS; SPATIAL VARIABILITY; CO2; CONTINENT; WATER; TOOL SO - Geophysical Research Letters 2004 ;31(14): 12850 UI - 3913 AU - Yagi Y AU - Mikurno T AU - Pacheco J AU - Reyes G AD - Int Inst Seismol & Earthquake Engn, Bldg Res Inst, Tsukuba, Ibaraki 3050802, JapanUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Colima, Colima, MexicoYagi, Y, Int Inst Seismol & Earthquake Engn, Bldg Res Inst, 1 Tatehara, Tsukuba, Ibaraki 3050802, Japan TI - Source rupture process of the Tecoman, Colima, Mexico earthquake of 22 January 2003, determined by joint inversion of teleseismic body-wave and near-source data AB - The spatial and temporal slip distribution of the Tecoman, Colima, Mexico earthquake is estimated from near-source strong-motion and teleseismic body-wave data. To perform a stable inversion, we applied smoothing constraints and determined their optimal relative weights on the observed data using an optimized Akaike's Bayesian information criterion (ABIC). The source parameters are as follows: (strike, dip, slip) = (300degrees, 20degrees, 93degrees), seismic moment M-0 = 2.3 x 10(20) N m; source duration = 30 sec; along-strike distance = 35 km; along-dip distance = 70 km. We found that the rupture process can be divided into three stages: the rupture nucleated near the hypocenter (stage I), then it broke the first asperity centering about 15 km southwest from the epicenter (stage II); and the rupture propagated to the northeast and the second asperity was broken (stage III). We also estimated the shear-stress change due to the rupture process of the mainshock on and around the major fault zone. It appears that one cluster of aftershocks for the first 5 days, which took place in and adjacent to the zones of stress, increased due to the fault rupture during the mainshock, but overall correlation between the aftershock location and the stress pattern is not clear MH - Japan MH - Mexico|Colima MH - Mexico|Distrito Federal PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000224952900015 L2 - FORM INVERSION; RIVERA PLATE; HISTORY; JALISCO; FAULT SO - Bulletin of the Seismological Society of America 2004 ;94(5):1795-1807 12851 UI - 2779 AU - Yanez-Arancibia A AU - Day JW AD - Inst Ecol AC, Coastal Ecosyst Unit, Xalapa 91070, Veracruz, MexicoLouisiana State Univ, Coastal Ecol Inst, Sch Coast & Environm, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803, USAYanez-Arancibia, A, Inst Ecol AC, Coastal Ecosyst Unit, Km 2-5 Antigua Carretera Coatepec,351,POB 63, Xalapa 91070, Veracruz, Mexico TI - The Gulf of Mexico: towards an integration of coastal management with large marine ecosystem management AB - This is the introductory paper to the special issue on Coastal Management in the Gulf of Mexico large marine ecosystem. The Gulf of Mexico is the largest open water body of internationally protected habitats in the Atlantic Ocean. It is a semi-enclosed sea and is the ninth largest body of water in the world. The Gulf region covers more than 1,942,500 km(2) including open water areas and coastal wetlands with input from 33 major river systems. There are 207 significant estuarine systems, and extensive barrier-islands with coastal lagoons, both in the United States and Mexico. The Gulf's drainage system covers more than 60% of the US and more than 40% of Mexico, with a coastline of 2934km in the US and 3200km including the Caribbean littoral-in Mexico. The Exclusive Economic Zones of three countries, USA, Mexico and Cuba, converge in the Gulf. The Gulf constitutes a "Large Marine Ecosystem" LME that includes freshwater continental drainage from five countries. The Gulf is an international aquatic-terrestrial ecosystem and must be analyzed, protected and used in such a way as to optimize the economic and environmental returns from the exploitation of its resources. The 48 million people in the US and the 15 million people in Mexico who live in the coastal states require stronger cooperation. There is immediate need for cooperation regarding such issues as investment, tourism, agriculture, fishing, health and environment, education and culture, infrastructure, communications, financing, trade, institutional arrangements, and sustainable development. Many of these issues are geographic in nature, whereas some are tied not only to geography but the use of the body of water that links them. Thus, they are water dependent. The Gulf of Mexico is a shared resource at risk, with the following major problems: (a) freshwater use and shortage, (b) pollution, (c) habitat modification, (d) unsustainable exploitation of living resources, (e) global change (sea level rise, temperature increase and change in rainfall patterns), (f) public education, and (g) lack of political interest. However, no plan for the management of the Gulf of Mexico as a whole exists, and integrative studies are still scarce in spite of much study of ecosystems and resources. Because of this, there is a special need for attention to and reinforcement of integrative, collaborative efforts because the Gulf is a bi-national priority region and focus of attention at world level. Currents efforts include the Gulf of Mexico Program (US Environmental Protection Agency) and coastal initiatives from the National Oceanic and Atmospheric Administration (NOAA) in the US, and the Management Program ICZM-Gulf/Caribbean (SEMARNAT, INECOL A.C.) in Mexico. The challenge for the future for coastal management in the Gulf of Mexico should be towards a combination of integrated coastal management with large marine ecosystem management. (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Veracruz MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography;Water Resources U5 - J;Editorial Material AV - English IS - 0964-5691 UR - ISI:000227621600001 L2 - HIERARCHICAL APPROACH; MISSISSIPPI DELTA; CLIMATE-CHANGE; HABITAT CHANGE; SOUTHERN GULF; SPECIAL-ISSUE; WASTE-WATER; SUSTAINABILITY; FISHERIES; IMPACTS SO - Ocean & Coastal Management 2004 ;47(11-12):537-563 12852 UI - 2784 AU - Yanez-Arancibia A AU - Day JW AD - CONACYT, Inst Ecol AC, Coastal Ecosyst Unit, Xalapa 91070, Veracruz, MexicoLouisiana State Univ, Sch Coast & Environm, Coastal Ecol Inst, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803, USAYanez-Arancibia, A, CONACYT, Inst Ecol AC, Coastal Ecosyst Unit, Km 2-5 Antigua Carretera Coatepec 351, Xalapa 91070, Veracruz, Mexico TI - Environmental sub-regions in the Gulf of Mexico coastal zone: the ecosystem approach as an integrated management tool AB - Ecological sub-regions are a way of viewing coastal zone (CZ) regions that have been developed to enhance the capability of NGOs, governmental organizations, and academics to assess conditions and trends of the major ecosystems in the Gulf of Mexico (Gulf), mainly as a management tool for defining priority actions towards sustainable development. Major "geographical regions" at scale-1-level (1:40) are: (a) the warm-temperate Gulf, (b) the tropical Gulf, and (c) the Caribbean coast of Mexico related to the Gulf. At scale-3-level (1:5 million) in region "A," six distinct environmental sub-regions are defined: Western Florida Estuarine Area, Eastern Gulf Neritic, Mississippi Estuarine Area, Texas Estuarine Area, Laguna Madre Estuarine Area, and Western Gulf Neritic. In regions "B" and "C", 13 distinct environmental sub-regions are defined: Southeast Floridian Neritic, Florida Keys, Florida Bay, Shark River Estuarine Area, Dry Tortugas/Florida Keys Reef Tract, Southwest Floridian Neritic, Veracruzan Neritic, Tabascan Neritic, Campeche Yucatanean Inner Neritic, Campeche Yucatanean Outer Neritic, Contoyan Neritic, Cancunean Neritic, and SianKa'anean Neritic. From a "hydrological units" focus, five main sub-regions are defined: (a) The western Florida rivers and ground-water discharge system, (b) The Mississippi River basin and delta, (c) The Texas estuaries and Laguna Madre US-Mexico integrated by the Rio Bravo delta, (d) The Usumacinta/Grijalva River basin and delta, and (e) The Rio Hondo-Chetumal Bay in the Caribbean coast of Mexico. Each "geographical/hydrological" sub-region can be viewed as a discrete system which results from the interaction of geologic, geomorphologic, oceanographic, climatic, freshwater drainage, physical, chemical, coastal vegetation, wildlife, estuary-shelf interactions, and human factors. The ecosystem approach adopted as a management tool for environmental sub-regions is predicated on: (a) accepting that interactions between the environment (atmosphere, water, land, biota) and human activities (social, cultural, economics) are inseparable, (b) realizing that humans are the major driving forces behind most ecological change, (c) recognizing environmental thresholds and their importance and linkages to human activities, (d) incorporating the needs of current and future generations, and e) implementing a long-term perspective that is anticipatory, preventative, and sustainable. We suggest for each sub-region to develop key agenda-topics to strengthen ICM and answer questions on, e.g., (a) controls of primary production and water fertility in the coastal zone, (b) energetic pulsing as the basis for sustainable management, (c) vulnerability of the coastal zone to global climatic change, (d) coastal wetlands restoration, and (e) environmental sustainability and the economic development of the coastal zone. (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Veracruz MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Oceanography;Water Resources U5 - J;Article AV - English IS - 0964-5691 UR - ISI:000227621600010 L2 - FRESH-WATER INFLOWS; SOUTH FLORIDA; SPECIAL-ISSUE; RIVER; ESTUARIES; IMPACTS; SUSTAINABILITY; VARIABILITY; FISHERIES; SCIENCE SO - Ocean & Coastal Management 2004 ;47(11-12):727-757 12853 UI - 6571 AU - Yanez L AU - Borja-Aburto VH AU - Rojas E AU - de la Fuente H AU - Gonzalez-Amaro R AU - Gomez H AU - Jongitud AA AU - az-Barriga F AD - Univ Autonoma San Luis Potosi, Toxicol Lab, Ambiental Fac Med, San Luis Potosi 78210, MexicoInst Mexicano Seguro Social, San Luis Potosi, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, San Luis Potosi, MexicoUniv Nacl Autonoma Mexico, Fac Quim, San Luis Potosi, CA, USAHosp Gen Ciudad Valles, San Luis Potosi, CA, USADiaz-Barriga, F, Univ Autonoma San Luis Potosi, Toxicol Lab, Ambiental Fac Med, Ave Venustiano,Carranza 2405,Col Lomas loas, San Luis Potosi 78210, Mexico TI - DDT induces DNA damage in blood cells. Studies in vitro and in women, chronically exposed to this insecticide AB - In this study, DDT-induced DNA damage on blood cells was analyzed both in vitro and in vivo. Peripheral blood mononuclear cells (PBMQ were isolated from healthy donors and incubated in the presence of three different concentrations (40, 80, and 100 mug/mL) of pp-DDT, pp'-DDE, and pp'-DDD at three different treatment times (24, 48, and 72 h). Then, DNA damage was assessed by the single-cell electrophoresis assay (comet assay) as well as by flow cytometry detection of hypodiploid cells (DNA content assay). All compounds induced significant DNA damage as shown by the comet assay. Accordingly, cells exposed to DDT, DDE, and DDD showed a significant increase in the percentage of hypodiploid cells compared with untreated PBMC. In agreement with the in vitro data, a significant correlation between blood levels of DDT, DDD, and DDE and DNA damage (comet assay) was found in women with different amounts of environmental exposure. This association remained significant after controlling for nutritional status, smoking habits, alcohol ingestion, and reported exposure to other pesticides. Although the precise biological importance remains to be explained, our results strongly suggest that DDT and its metabolites are able to induce DNA damage in PBMC both in vitro and in vivo. (C) 2003 Elsevier Science (USA). All rights reserved MH - Mexico|San Luis Potosi MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 14 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0013-9351 UR - ISI:000187616500003 L2 - DDT;DDE;malaria;comet assay;DNA damage;ORGANOCHLORINE PESTICIDE-RESIDUES; COMET ASSAY; GEL-ELECTROPHORESIS; LIPID-PEROXIDATION; HUMAN-LYMPHOCYTES; HUMAN-MILK; MEXICO; VERACRUZ; RATS; WORKERS SO - Environmental Research 2004 ;94(1):18-24 12854 UI - 4177 AU - Yazdizadeh M AU - Tapia JL AU - Baharvand M AU - Radfar L AD - SUNY Buffalo, Sch Dent Med, Buffalo, NY 14214, USAUniv Shaheed Beheshti, Sch Dent, Tehran, IranUNAM, Fac Odontol, CONACyT Scholarship Program, Mexico City, DF, MexicoRadfar, L, SUNY Buffalo, Sch Dent Med, 355 Squire Hall,3435 Main St, Buffalo, NY 14214 USA TI - A case of neurofibromatosis-Noonan syndrome with a central giant cell granuloma AB - Neurofibromatosis Type 1 (NF1) is one of the most common autosomal dominant diseases affecting multiple systems including the vascular, skeletal, and central nervous system. Noonan syndrome (NS) is an autosomal dominant genetic disorder, associated with musculoskeletal and skin manifestations. Coexistence of central giant cell lesions in patients with both NS and NF1 were reported in the literature. Development of multiple central giant cell lesions in a patient with a Noonan syndrome has been referred to as Noonan-like syndrome. A few cases with features of NF1 and NS have been termed as NF1-NS. Here, we present a case of so-called NF-NS associated with a central giant cell lesion MH - Iran MH - Mexico|Distrito Federal MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 3 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1079-2104 UR - ISI:000224350100010 L2 - TYPE-1 NEUROFIBROMATOSIS; LESIONS; PHENOTYPE; NF1; MUTATION; LINKAGE; PATIENT; FAMILY; LOCUS; GENE SO - Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontics 2004 ;98(3):316-320 12855 UI - 4392 AU - Yee-Rendon CM AU - Perez-Centeno A AU - Melendez-Lira M AU - de la Cruz GG AU - Lopez-Lopez M AU - Furuya K AU - Vaccaro PO AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoNatl Inst Mat Sci, Tsukuba, Ibaraki 3050003, JapanATR Wave Engn Labs, Dept Photon, Keihanna Sci City, Kyoto 6190288, JapanLopez-Lopez, M, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apartado Postal 14-740, Mexico City 07000, DF, Mexico TI - Interdiffusion of Indium in piezoelectric InGaAs/GaAs quantum wells grown by molecular beam epitaxy on (11n) substrates AB - Pseudomorphic In0.2Ga0.8As/GaAs quantum wells (QWs) were grown by molecular beam epitaxy on GaAs substrates oriented along (11n) directions, with n=1,2,3,4. The optical and structural properties of the heterostructures were studied by photoluminescence (PL), photoreflectance (PR) spectroscopy, and atomic force microscopy measurements. The energy transitions in the QWs have two contributions, a blueshift due to the compressive strain, and a redshift due to the quantum confined Stark effect produced by the piezoelectric field present in the QWs. A variational approach was employed to calculate the QWs ground energy transitions employing an ideal potential well with sharp interfaces. The theoretical energy transitions were fitted to the PL peaks energy to obtain the electric fields in the InGaAs QWs. The obtained electric fields show discrepancies with theoretical piezoelectric fields calculated from the strain present in the QWs. In order to overcome these discrepancies, we propose to include interdiffusion effects of In at the well interfaces. The matrix transfer method was implemented to numerically solve the Schrodinger equation taking into account In interdiffusion effects by including an asymmetric potential well with a profile depending on the details of the In incorporation. With interdiffusion effects included in the energy level calculations, and assuming the expected piezoelectric fields, the theoretical results reproduce very well the experimental values of PL and PR. (C) 2004 American Institute of Physics MH - Japan MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000224145800016 L2 - MODULATION SPECTROSCOPY; GAAS; ELECTROREFLECTANCE; PHOTOREFLECTANCE; SEGREGATION SO - Journal of Applied Physics 2004 ;96(7):3702-3708 12856 UI - 4884 AU - Yencha AJ AU - Juarez AM AU - Lee SP AU - King GC AU - Bennett FR AU - Kemp F AU - Mcnab IR AD - SUNY Albany, Dept Chem, Albany, NY 12222, USAUniv Manchester, Schuster Lab, Dept Phys & Astron, Manchester M13 9PL, Lancs, EnglandCSIRO, Bentley, WA 6982, AustraliaUniv Newcastle Upon Tyne, Sch Nat Sci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, EnglandUNAM, Ctr Ciencias Fis, FAMO, Cuernavaca 62210, Morelos, MexicoYencha, AJ, SUNY Albany, Dept Chem, Albany, NY 12222, USA TI - Photo-double ionization of hydrogen iodide: experiment and theory AB - Photo-double ionization of hydrogen iodide has been investigated over the photon energy range 29.0-32.5 eV by threshold photoelectrons coincidence (TPEsCO) spectroscopy and by ab initio calculations that included spin-orbit interaction. Good agreement is found between experiment and theory for the adiabatic ionization potentials for the formation of the X(3)Sigma(-), a (1)Delta and b (1)Sigma(+) states of HI2divided by and for the vibrational separations and relative vibrational intensities within the states. The spin-orbit splitting of the X(3)Sigma(-) state of HI2divided by is calculated to be 0.17924 eV for nu(2+) = 0. Because this splitting is close to the calculated vibrational separations within the spin-orbit components of this state [e.g., for nu(2+) = 0-1, 0.22382 eV in (3)Sigma(0)(-) and 0.22163 eV in (3)Sigma(1)(-)], there is an overlapping of vibrational structure within the TPEsCO spectrum at the resolution used that is confirmed by tale simulation spectrum. (C) 2004 Elsevier B.V. All rights reserved MH - Australia MH - United Kingdom MH - Mexico|Morelos MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0301-0104 UR - ISI:000222786800022 L2 - PHOTOELECTRONS COINCIDENCE SPECTROSCOPY; AUGER-ELECTRON SPECTRUM; POSITIVE DIATOMIC IONS; POTENTIAL CURVES; CHARGED IONS; PREDISSOCIATION RATES; INFRARED-SPECTRUM; BASIS-SETS; HCL2+; MOLECULE SO - Chemical Physics 2004 ;303(1-2):179-187 12857 UI - 4582 AU - Yllescas E AU - Garcia MG AU - Martinez H AU - Guzman LA AU - Hernandez G AU - Cordero G AU - Salinas V AU - Merritt TA AD - Inst Nacl Perinatol, Mexico City, DF, MexicoSt Charles Hosp, Bend, OR, USA TI - Intermittent positive pressure using nasopharyngeal ventilation as a method to assist extubation among newborn infants less than 1500 grams MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 1 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000220591102958 SO - Pediatric Research 2004 ;55(4):508A-508A 12858 UI - 4437 AU - yon-Beato E AU - Martinez C AU - Zanelli J AD - Ctr Estudios Cient, Valdivia, ChileInst Politecn Nacl, CINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoAyon-Beato, E, Ctr Estudios Cient, Casilla 1469, Valdivia, Chile TI - Birkhoff's theorem for three-dimensional AdS gravity AB - All three-dimensional matter-free space-times with negative cosmological constant, compatible with cyclic symmetry, are identified. The only cyclic solutions are the 2+1 (BTZ) black hole with SO(2)xR isometry, and the self-dual Coussaert-Henneaux space-times, with isometry groups SO(2)xSO(2,1) or SO(2)xSO(2) MH - Chile MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000223859700091 L2 - BLACK-HOLES SO - Physical Review D 2004 ;70(4): 12859 UI - 5717 AU - Yoon M AU - Han SW AU - Kim G AU - Lee SB AU - Berber S AU - Osawa E AU - Ihm J AU - Terrones M AU - Banhart F AU - Charlier JC AU - Grobert N AU - Terrones H AU - Ajayan PM AU - Tomanek D AD - Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USAPrinceton Univ, Princeton Mat Inst, Princeton, NJ 08544, USASeoul Natl Univ, Sch Phys, Seoul 151747, South KoreaNanoCarbon Res Inst Ltd, Chosei, Chiba 2994395, JapanIPICyT, Adv Mat Dept, San Luis Potosi 78210, SLP, MexicoUniv Mainz, Inst Phys Chem, D-55099 Mainz, GermanyUniv Catholique Louvain, PCPM&CERMIN, B-1348 Louvain, BelgiumMax Planck Inst Met Res, D-70569 Stuttgart, GermanyRensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180, USATomanek, D, Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA TI - Zipper mechanism of nanotube fusion: Theory and experiment AB - We propose a new microscopic mechanism to explain the unusually fast fusion process of carbon nanotubes. We identify the detailed pathway for two adjacent (5,5) nanotubes to gradually merge into a (10,10) tube, and characterize the transition states. The propagation of the fused region is energetically favorable and proceeds in a morphology reminiscent of a Y junction via a zipper mechanism, involving only Stone-Wales bond rearrangements with low activation barriers. The zipper mechanism of fusion is supported by a time series of high-resolution transmission electron microscopy observations MH - USA MH - Belgium MH - Germany MH - Japan MH - Mexico|San Luis Potosi MH - South Korea PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000189139500040 L2 - WALLED CARBON NANOTUBES; FULLERENES; GROWTH; REARRANGEMENTS; ENERGETICS; PATHWAYS; DEFECTS; C-60 SO - Physical Review Letters 2004 ;92(7): 12860 UI - 6237 AU - York D AU - Evensen NM AU - Martinez ML AU - Delgado JD AD - Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, CanadaCICESE, Dept Geol, Ensenada 22860, Baja California, MexicoYork, D, Univ Toronto, Dept Phys, 60 St George St, Toronto, ON M5S 1A7, Canada TI - Unified equations for the slope, intercept, and standard errors of the best straight line AB - It has long been recognized that the least-squares estimation method of fitting the best straight line to data points having normally distributed errors yields identical results for the slope and intercept of the line as does the method of maximum likelihood estimation. We show that, contrary to previous understanding, these two methods also give identical results for the standard errors in slope and intercept, provided that the least-squares estimation expressions are evaluated at the least-squares-adjusted points rather than at the observed points as has been done traditionally. This unification of standard errors holds when both x and y observations are subject to correlated errors that vary from point to point. All known correct regression solutions in the literature, including various special cases, can be derived from the original York equations. We present a compact set of equations for the slope, intercept, and newly unified standard errors. (C) 2004 American Association of Physics Teachers MH - Canada MH - Mexico|Baja California PB - MELVILLE: AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS RP - NOT IN FILE U3 - TC 14 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0002-9505 UR - ISI:000189105500011 L2 - LEAST-SQUARES FITS SO - American Journal of Physics 2004 ;72(3):367-375 12861 UI - 4507 AU - Yoshioka S AU - Mikumo T AU - Kostoglodov V AU - Larson KM AU - Lowry AR AU - Singh SK AD - Kyushu Univ, Fac Sci, Dept Earth & Planetary Sci, Fukuoka 8128581, JapanUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309, USAUniv Colorado, Dept Phys, Boulder, CO 80309, USAYoshioka, S, Kyushu Univ, Fac Sci, Dept Earth & Planetary Sci, Hakozaki 6-10-1,Higashi Ward, Fukuoka 8128581, Japan TI - Interplate coupling and a recent aseismic slow slip event in the Guerrero seismic gap of the Mexican subduction zone, as deduced from GPS data inversion using a Bayesian information criterion AB - A large-scale slow slip event with a magnitude equivalent to Mw = 7.4 has been observed at seven continuous GPS stations located in the Guerrero-Oaxaca region, southern Mexico, for several months from late 2001 to middle 2002 [Geophys. Res. Lett. (2003) 30: doi: 10.1029/2003GLO17219]. We re-analyzed the GPS time series data to estimate the displacements associated with the slow slip event and also the displacement rates during the interseismic period prior to this event, by applying an inversion technique using a Bayesian information criterion (ABIC). We then carried out GPS data inversion again with ABIC and some detailed forward modeling to obtain spatial distributions of the back-slip rates and the slow slip on a 3-D curved plate interface between the subducting Cocos and the overriding North America plates. The results show that the average direction of the back-slip rates is N31.3degreesE +/- 5.6degrees, which is congruent with that of plate convergence in this region. Interplate coupling is found to be very strong down to a depth of about 45 km, indicating a coupling ratio of 0.83-0.86 except for a couple of segments on the model region, and decreases dramatically down below. The average direction of the slow slip is oriented about 20degrees-35degrees counterclockwise from the opposite direction of the plate convergence. The slow slip detected on the mid-depth segment to the upper rim of the model region reaches about 9-18 cm in the landward region of the Guerrero seismic gap from inversion and forward modeling. From these results, we conclude it is possible that the slow slip may have invaded a deeper part of the strongly coupled, seismogenic zone at least up to a depth of about 25 km. We also estimate stress changes due to the slow slip event. Some decrease in shear stress on the plate interface at these depths suggests that if such a slow slip event occurred episodically, it is possible that the time of occurrence of a forthcoming large earthquake in the Guerrero gap would be delayed to some extent. (C) 2004 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0031-9201 UR - ISI:000223562100007 L2 - ABIC;GPS data inversion;forward modeling;interplate coupling;aseismic slow slip event;aseismic slip on the seismogenic zone;guerrero seismic gap;GEODETIC DATA INVERSION; CENTRAL JAPAN; TECTONIC IMPLICATIONS; SOUTHWEST JAPAN; PLATE BOUNDARY; TOKAI DISTRICT; FAULT SLIP; WAVE-FORMS; EARTHQUAKES; MICHOACAN SO - Physics of the Earth and Planetary Interiors 2004 ;146(3-4):513-530 12862 UI - 4983 AU - Young KE AU - Thompson BC AU - Terrazas AL AU - Montoya AB AU - Valdez R AD - New Mexico State Univ, New Mexico Cooperat Fish & Wildlife Res Unit, Las Cruces, NM 88003, USANew Mexico State Univ, Fishery & Wildlife Sci Dept, Las Cruces, NM 88003, USAUniv Autonoma Chihuahua, Fac Zootecnia, Chihuahua, MexicoPeregrine Fund, Boise, ID 83709, USAYoung, KE, New Mexico State Univ, New Mexico Cooperat Fish & Wildlife Res Unit, Box 30003,MSC 4901, Las Cruces, NM 88003 USA TI - Aplomado Falcon abundance and distribution in the northern Chihuahuan Desert of Mexico AB - The northern Aplomado Falcon (Falco femoralis septentrionalis) historically Occupied coastal prairies, savannas, and desert grasslands from southern Mexico north to southern and Southwestern Texas, Southern New Mexico, and southeastern Arizona. Current resident Aplomado Falcon Populations are primarily in Mexico, with isolated populations in southern Texas and from northern Chihuahua to Southern New Mexico. We conducted surveys in semidesert grasslands/savannas and associated habitats in northern Chihuahua to locate Aplomado Falcons and to better delineate their distribution and abundance in the northern Chihuahuan Desert during 1998-99. Data were collected by surveying large tracts. transects; in nonrandomly selected grasslands, and from a falcon monitoring study. Based on all survey effort, the minimum known population of adult Aplomado Falcons in the study area in northern Chihuahua was 79 individuals. Aplomado Falcons were primarily associated with grassland communities. Most falcon nests (88%) were found in grassland communities with soaptree yucca (Yucca elata) or Torrey yucca (Y. toreyi). Aplomado Falcons were found fairly clustered in the north-central to northeastern part of the study area. We found falcons nesting ca. 50 km west of the Texas border (ca. 120 km South of El Paso) in northern Chihuahua. Because Aplomado Falcons are associated with grassland communities, continued degradation of Chihuahuan Desert semidesert grasslands will continue to influence their distribution MH - Mexico|Chihuahua MH - USA PB - HASTINGS: RAPTOR RESEARCH FOUNDATION INC RP - NOT IN FILE U3 - TC 0 U4 - Ornithology U5 - J;Article AV - English IS - 0892-1016 UR - ISI:000222545900001 L2 - Aplomado Falcon;Falco femoralis;Chihuahuan Desert;Chihuahua, Mexico;distribution SO - Journal of Raptor Research 2004 ;38(2):107-117 12863 UI - 4740 AU - Youte JJ AU - Barbier D AU - Al-Mourabit A AU - Gnecco D AU - Marazano C AD - CNRS, Inst Chim Subst Nat, F-91198 Gif Sur Yvette, FranceUniv Puebla, BUAP Cd, Ctr Quim, Puebla 72570, MexicoUniv Puebla, BUAP Cd, Inst Ciencias, Puebla 72570, MexicoMarazano, C, CNRS, Inst Chim Subst Nat, 1 Ave Terrasse, F-91198 Gif Sur Yvette, France TI - An enantioselective access to 1-alkyl-1,2,3,4-tetrahydroisoquinolines. Application to a new synthesis of (-)-argemonine AB - Potassium ferricyanide oxidation of salt 1 gave isoquinolinone 7 whose treatment with Grignard reagents resulted in a high-yield formation of substituted isoquinolinium salts 5. The selectivity of the reduction of these salts to give derivatives 6 has been studied. Particularly good selectivities (82-84%) were observed when R is a benzylic group. On the basis of these results, a practical and enantioselective synthesis of the natural alkaloid H-argemonine is presented MH - France MH - Mexico|Puebla PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0022-3263 UR - ISI:000220752500012 L2 - PAVINE; ALKALOIDS; AMINES SO - Journal of Organic Chemistry 2004 ;69(8):2737-2740 12864 UI - 5400 AU - Yu P AU - Morey SL AU - Zavala-Hidalgo J AD - Florida State Univ, COAPS, Tallahassee, FL 32306, USANatl Autonomous Univ Mexico, Ctr Atmospher Sci, Mexico City, DF, MexicoYu, P, Florida State Univ, COAPS, Tallahassee, FL 32306, USA TI - New mapping method to observe propagating features - Complex empirical orthogonal function analysis for spatial and temporal interpolation with applications to satellite data MH - Mexico|Distrito Federal MH - USA PB - ARLINGTON: COMPASS PUBLICATIONS, INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Ocean U5 - J;Article AV - English IS - 0093-3651 UR - ISI:000221578800004 SO - Sea Technology 2004 ;45(5):20-+ 12865 UI - 4734 AU - Zadok D AU - Carrillo C AU - Missiroli F AU - Litwak S AU - Robledo N AU - Chayet AS AD - Assaf Harofeh Med Ctr, Dept Ophthalmol, IL-70300 Zerifin, IsraelCODET, Aris Vis Inst, Tijuana, MexicoTel Aviv Univ, Fac Med, IL-69978 Tel Aviv, IsraelZadok, D, Assaf Harofeh Med Ctr, Dept Ophthalmol, IL-70300 Zerifin, Israel TI - The effect of corneal flap on optical aberrations AB - PURPOSE: To evaluate the changes in ocular aberrations induced by corneal flap creation. DESIGN: Prospective interventional nonrandomized clinical trial. METHODS: This study included 15 patients who were scheduled for laser in situ keratomileusis. A nasal hinge flap was created, using the Nidek MK-2000 microkeratome and then replaced without performing laser ablation. The ocular aberrations were measured before and after flap creation using the Nidek Optical Path Difference Scanning System ARK-10000. RESULTS: The root mean square wavefront errors of the higher,order optical aberrations (third-, fourth-, fifth,, and sixth,order aberrations) were not significantly altered at 1 week postsurgery compared with the preoperative values (P > .35). CONCLUSIONS: Creating a corneal flap with the Nidek MK-2000 microkeratome did not induce changes in higher,order optical aberrations as measured with the Nidek Optical Path Difference Scanning System ARK, 10000 during the early postoperative period. (C) 2004 by Elsevier Inc. All rights reserved MH - Israel MH - Mexico|Baja California PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 7 U4 - Ophthalmology U5 - J;Article AV - English IS - 0002-9394 UR - ISI:000223186100002 L2 - IN-SITU KERATOMILEUSIS; PHOTOREFRACTIVE KERATECTOMY; OCULAR ABERRATIONS; LASER; SURGERY; MYOPIA; EYES SO - American Journal of Ophthalmology 2004 ;138(2):190-193 12866 UI - 3709 AU - Zaharieva M AU - Prosperi JM AU - Monneveux P AD - ENSA, INRA, UMR Divers & Genome Plantes Cult, F-34060 Montpellier 01, FranceZaharieva, M, Univ Nacl Autonoma Mexico, Inst Ecol, AP 70-275, Mexico City 04510, DF, Mexico TI - Ecological distribution and species diversity of Aegilops L. genus in Bulgaria AB - The genus Aegilops has an important potential utilization in wheat improvement because of its resistance to different biotic and abiotic stresses and close relation with the cultivated wheat. Therefore, a better knowledge of the eco-geographical distribution of Aegilops species and their collection and conservation are required. A total of 297 Aegilops accessions representing nine (five tetraploid and four diploid) species were collected in different regions of Bulgaria, and the ecological characteristics of the 154 explored sites were recorded. The distribution of the diploid species (Ae. caudata L., Ae. speltoides Tausch, Ae. umbellulata Zhuk. and Ae. comosa Sibth. and Sm.) was limited to specific environments in south-central Bulgaria. Tetraploid species were present in harsher environments than diploid species and showed wider adaptation and distribution. Species-environment relationships were analysed by considering the worldwide distribution of the species and their physiological resistance to abiotic stress. Aegilops cylindrica Host was more frequently found in northern Bulgaria and at high altitudes. Its distribution was closely related to its tolerance to low temperatures. Aegilops geniculata Roth and Ae. neglecta Req. ex Bertoi. were absent in the north of Bulgaria, but widely distributed in low rainfall areas. Aegilops neglecta, more frost resistant than Ae. geniculata, was present at higher altitude. Aegilops biuncialis Vis. and Ae. triuncialis L. showed adaptation to a wide range of climatic conditions. The study of Aegilops species ecology and distribution in Bulgaria provided useful information for the future collection and for the genetic resource management in this region MH - France MH - Mexico|Distrito Federal PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000225691300008 L2 - Aegilops;Bulgaria;diversity;ecology;species-environment relationships;WILD-WHEAT; TRITICUM-DICOCCOIDES; HORDEUM-SPONTANEUM; NUMERICAL-ANALYSIS; POPULATIONS; ISRAEL; GENOME SO - Biodiversity and Conservation 2004 ;13(12):2319-2337 12867 UI - 3960 AU - Zaidi PH AU - Rafique S AU - Rai PK AU - Singh NN AU - Srinivasan G AD - Indian Agr Res Inst, Directorate Maize Res, New Delhi 110012, IndiaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoZaidi, PH, Indian Agr Res Inst, Directorate Maize Res, Pusa Campus, New Delhi 110012, India TI - Tolerance to excess moisture in maize (Zea mays L.): susceptible crop stages and identification of tolerant genotypes AB - Excess moisture (water-logging) during the summer-rainy season is one of the major production constraints for maize (Zea mays L.) in a large area of Southeast Asia. Identification and development of genotypes capable of withstanding the stress conditions could be an ideal and affordable approach suitable for resource poor maize-growing farmers of such areas. We attempted to identify the most susceptible/critical crop stage(s) of maize for excess moisture stress, and to develop a screening technique and selection strategies for identification of germplasm tolerant to excess moisture stress. Among the four crop stages, i.e. early seedling (V2), knee-high (V7), tasseling (VT) and milk stage (RI), V2 was found to be highly susceptible, followed by the V7 stage. A screening technique (cup method) was developed/standardized, and was found to be an efficient technique for large-scale screening of maize genotypes against excess soil moisture stress. Germplasm was screened using this technique followed by field evaluation at the V7 growth stage (seventh leaf visible). Excess soil moisture stress severely affected various growth and biochemical parameters, impaired anthesis and silking, and eventually resulted in poor kernel development and yield. However, remarkable variability was found among the genotypes studied. Genotypes with good carbohydrate accumulation in stem tissues, moderate stomatat conductance, <5 days ASI, high root porosity, and early brace root development ability have been found to have good tolerance against the hypoxia/anoxia caused by excess soil moisture conditions. (C) 2004 Elsevier B.V. All rights reserved MH - India MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Agronomy U5 - J;Article AV - English IS - 0378-4290 UR - ISI:000224913000002 L2 - excess moisture;maize;secondary traits;susceptible stage;water-logging;DROUGHT TOLERANCE; GROWTH; STRESS; PLANTS; CORN; METABOLISM; RESPONSES; ANOXIA; WATER; SUBMERGENCE SO - Field Crops Research 2004 ;90(2-3):189-202 12868 UI - 6295 AU - Zaleta-Aguilar A AU - Royo J AU - Rangel VH AU - Torres-Reyes E AD - Univ Guanajuato, Dept Mech Engn, Salamanca, Gto, MexicoUniv Guanajuato, Inst Invest Cient, Res Sci Inst, Salamanca, Gto, MexicoUniv Zaragoza, CIRCE, Res Ctr Power Plant Efficiency, Zaragoza, SpainZaleta-Aguilar, A, Univ Guanajuato, Dept Mech Engn, Prol Tamp S-N, Salamanca, Gto, Mexico TI - Thermo-characterization of power systems components: a tool to diagnose their malfunctions AB - Concepts on thermodynamic characterization of power system components are presented in this paper. The aim of this work is to evaluate and diagnose the actual operating condition for existing power plant components. What is more, a Reference Performance State (RPS) for power system components which uses the parameters defined as the enthalpy change, omega, the entropy change, sigma and the Mass Flow Ratio design, MFR is put forward. Design information and simulation will help to determine the RPS for each component operating without any malfunction. The RPS can be used to compare, to evaluate and to diagnose the actual operating condition of the plant components so as to detect its possible malfunction. A simulated example of a 105 MW power plant is presented herein so that thermo-characterization of steam turbines, a condenser, a heat exchanger, and a pump is illustrated. The induced and intrinsic component malfunction effects on the RPS are also presented. Their effects are related to the RPS, thereby opening the possibility to apply methodologies to any internal decay and/or induced malfunctions that could appear in an operating component, in terms of the heat rate impact. (C) 2003 Elsevier Ltd. All rights reserved MH - Mexico|Guanajuato MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Thermodynamics;Energy & Fuels U5 - J;Article AV - English IS - 0360-5442 UR - ISI:000188868500004 SO - Energy 2004 ;29(3):361-377 12869 UI - 5765 AU - Zambrano E AU - Deas E AU - Guillen L AU - Bautista C AU - Nathanielsz PW AD - Inst Nacl Nutr Salvador Zubiran, Dept Reprod Biol, Delegac Tlalpan, Mexico City 14000, DF, MexicoNYU, Sch Med, Dept Obstet Gynecol, Ctr Womens Hlth Res, New York, NY, USA TI - Developmental programming by maternal undernutrition of glucose, triglyceride, cholesterol, insulin and glucose tolerance in rats is gender specific and period of exposure dependent MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 1071-5576 UR - ISI:000220184500146 SO - Journal of the Society for Gynecologic Investigation 2004 ;11(2):120A-120A 12870 UI - 5719 AU - Zamorano A AU - Mellstrom B AU - Vergara P AU - Naranjo JR AU - Segovia J AD - Ctr Invest & Estud Avanzados, IPN, Dept Fisiol Biofis & Neurociencias, Mexico City 07300, DF, MexicoCSIC, Ctr Nacl Biotecnol, Dept Biol Mol & Celular, E-28049 Madrid, SpainSegovia, J, Ctr Invest & Estud Avanzados, IPN, Dept Fisiol Biofis & Neurociencias, IPN 2508, Mexico City 07300, DF, Mexico TI - Glial-specific retrovirally mediated gas1 gene expression induces glioma cell apoptosis and inhibits tumor growth in vivo AB - We recently reported that the targeted expression of growth arrest specific 1 (Gas1) induces apoptosis in glioma cells. Because the vast majority of gliomas present genetic alterations that reduce their ability to undergo apoptosis, a gene therapy strategy aimed at reinstating apoptotic processes in glioma cells is an interesting approach for the treatment of these tumors. We used a retroviral gene transfer system to transduce C6 glioma cells with a transgene in which the expression of a full-length human gas1 cDNA is under the transcriptional control of a human promoter of the glial fibrillary acidic protein (gfa2). In vitro experiments showed that the retroviral transfer of gas1 significantly reduces the number of viable cells, and induces apoptosis in C6 cells, through the activation of caspase-3. Furthermore, retroviral-mediated transfer of gas1 to gliomas implanted in nude mice induces a significant inhibition of tumor growth, accompanied by increased caspase-3 activation. In the present experiments, we have taken advantage of the property of retrovirus to transfer transgenes exclusively to proliferating cells, together with the use of a glial specific promoter, to selectively target the expression of gas1, a pro-apoptotic gene, to glioma cells. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0969-9961 UR - ISI:000220796700006 L2 - tumor;C6 cells;p53;gene therapy gene transfer;astrocytes;cell death;THYMIDINE KINASE GENE; TYROSINE-HYDROXYLASE TRANSGENE; ASTROCYTE-SPECIFIC EXPRESSION; EXPERIMENTAL BRAIN-TUMORS; ARREST-SPECIFIC GENE; EXPERIMENTAL PARKINSONISM; GLIOBLASTOMA-MULTIFORME; BEHAVIORAL RECOVERY; MALIGNANT GLIOMA; PRODUCER CELLS SO - Neurobiology of Disease 2004 ;15(3):483-491 12871 UI - 4888 AU - Zapata LA AU - Rodriguez LF AU - Kurtz SE AU - O'Dell CR AU - Ho PTP AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAVanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAZapata, LA, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Apartado Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico TI - A cluster of 1.3 centimeter continuum sources in OMC-1 South AB - We present sensitive 1.3 cm radio continuum observations of the region OMC-1 South (OMC-1S) in Orion using the Very Large Array in its B configuration. We detect 11 radio sources clustered in a 30" x 30" region, of which only three had been detected previously at radio wavelengths in deep 3.6 cm observations. The eight new radio sources are compact (theta(s) less than or equal to 0".1), and we set lower limits to their spectral indices, alpha > 0.8 +/- 0.3 (with S-nu proportional to nu(alpha)), that suggest that they may be optically thick H II regions. However, one of the new sources exhibits significant circular polarization, indicating that gyrosynchrotron emission with large positive spectral indices may be an alternative explanation. Furthermore, we find that four other sources are associated with infrared sources of low bolometric luminosity that cannot drive an H II region. Finally, two of the sources previously detected at 3.6 cm are angularly resolved in the 1.3 cm image, and their major axes have position angles that align well with large-scale outflows emanating from OMC-1S. The radio source 143-353 has a major axis with a position angle consistent with those of the HH 202 and HH 528 flows, while the radio source 134-411 has a major axis with a position angle consistent with that of the low-velocity molecular outflow associated with the far-infrared source FIR 4 MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000222828700013 L2 - HII regions;ISM : individual (Orion OMC-1S);ISM : jets and outflows;radio continuum : stars;stars : pre-main-sequence;HERBIG-HARO OBJECTS; ORION-NEBULA; MOLECULAR OUTFLOWS; YOUNG STARS; TRAPEZIUM; CORE; PROTOSTARS; FEATURES; CENSUS; CLOUD SO - Astrophysical Journal 2004 ;610(2):L121-L124 12872 UI - 5799 AU - Zapata LA AU - Rodriguez LF AU - Kurtz SE AU - O'Dell CR AD - Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoVanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235, USAZapata, LA, Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Apdo Postal 3-72 Xangari, Morelia 58089, Michoacan, Mexico TI - Compact radio sources in Orion: New detections, time variability, and objects in OMC-1S AB - We present the analysis of four 3.6 cm radio continuum archival observations of Orion obtained using the Very Large Array in its A configuration, with 0."3 angular resolution. The observations were made during the period 1994 - 1997. In a region of 4' x 4', we detect 77 compact radio sources. Of these sources, 54 are detected in one or more of the individual observations, and 36 of these show time variability (by more than 30%) between the observed epochs. A deep image made from averaging all data shows an additional 23 faint sources, in the range of 0.1 to 0.3 mJy. Of the 77 sources, 39 are new centimeter detections. However, only 9 of the 77 sources do not have a previously reported counterpart at near-infrared, optical, or X-ray wavelengths. In particular, we detect three faint sources in the OMC-1S region that may be related to the sources that power the multiple outflows that emanate from this part of the Orion Nebula MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000220801600026 L2 - ISM : individual (Orion);radio continuum;stars : formation;stars : pre-main-sequence;TRAPEZIUM-CLUSTER; NEBULA CLUSTER; CIRCUMSTELLAR DISK; MOLECULAR CLOUD; MASS FUNCTION; CONTINUUM; RESOLUTION; STARS; EMISSION; OUTFLOWS SO - Astronomical Journal 2004 ;127(4):2252-2261 12873 UI - 5436 AU - Zapeda A AU - Arias C AU - Sengpiel F AD - Cardiff Univ, Cardiff Sch Biosci, Cardiff CF10 3US, S Glam, WalesUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City 04510, DF, MexicoSengpiel, F, Cardiff Univ, Cardiff Sch Biosci, Museum Ave, Cardiff CF10 3US, S Glam, Wales TI - Optical imaging of intrinsic signals: recent developments in the methodology and its applications AB - Since optical imaging (OI) of intrinsic signals was first developed in the 1980s, significant advances have been made regarding our understanding of the origins of the recorded signals. The technique has been refined and the range of its applications has been broadened considerably. Here we review recent developments in methodology and data analysis as well as the latest findings on how intrinsic signals are related to metabolic cost and electrophysiological activity in the brain. We give an overview of what optical imaging has contributed to our knowledge of the functional architecture of sensory cortices, their development and plasticity. Finally, we discuss the utility of OI for functional studies of the human brain as well as in animal models of neuropathology. (C) 2004 Elsevier B.V All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Biochemical Research Methods;Neurosciences U5 - J;Review AV - English IS - 0165-0270 UR - ISI:000221567800001 L2 - optical imaging;intrinsic signals;event-related;Fourier analysis;functional architecture;development;plasticity;CAT VISUAL-CORTEX; RAT BARREL CORTEX; ISO-ORIENTATION DOMAINS; PRIMARY AUDITORY-CORTEX; PRIMARY SOMATOSENSORY CORTEX; ANTERIOR PARIETAL CORTEX; MAMMALIAN OLFACTORY-BULB; PRIMATE STRIATE CORTEX; VOLTAGE-SENSITIVE DYES; MONKEY AREA MT SO - Journal of Neuroscience Methods 2004 ;136(1):1-21 12874 UI - 5030 AU - Zaragoza SR AU - Steinberger Y AD - UNAM, Microbiol Lab, Fac Estudios Super Iztacala, Tlalnepantla 54090, MexicoBar Ilan Univ, Fac Life Sci, IL-52900 Ramat Gan, IsraelZaragoza, SR, UNAM, Microbiol Lab, Fac Estudios Super Iztacala, Unidad Biol Tecnol & Prototipos,Avenida Los Barri, Tlalnepantla 54090, Mexico TI - Seasonal dynamics of amoebae in the root canopy of Zygophyllum dumosum in the Negev Desert, Israel AB - Water availability and nutrient limitation are the most important driving forces in hot desert ecosystems, determining vegetation cover and biological activity. In this study the amoeba population was determined in the upper soil layer (0-10 and 10-20 cm) under and between 4 individual Zygophyllum dumosum shrubs. The soil samples were taken from the different layer beneath the shrub and between the shrubs (control) along four seasons. Total number of amoeba was significantly higher in the Z. dumosum root canopy (2935 individual/g soil) in comparison to control samples (625 individual/g soil). Amoebal density was highest at 10-20 cm during the winter, spring and summer. In autumn, during heavy dewfall amoebal density was greatest in the top 10 cm of soil. (C) 2004 Elsevier GmbH. All rights reserved MH - Israel MH - Mexico|Estado De Mexico PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 0031-4056 UR - ISI:000222383000009 L2 - amoebae;protozoa;desert;soil;root canopy;MICROBIAL-POPULATION-DYNAMICS; SOIL-PROFILE; BIOMASS; SHRUB; ECOSYSTEM SO - Pedobiologia 2004 ;48(3):277-281 12875 UI - 3934 AU - Zarate AV AU - Mirambell E AD - Inst Mexicano TRansporte, Secretaria Comunicac & Transportes, Queretaro, MexicoUniv Politecn Catalunya, Barcelona, SpainZarate, AV, Inst Mexicano TRansporte, Secretaria Comunicac & Transportes, Queretaro, Mexico TI - Shear strength of tapered steel plate girders AB - Hot rolled beams can show insufficient strength or inertia and result in the inclusion of steel plate girders in the design (portal frames, steel and composite bridges). More efficient structural elements can often be achieved by designing these plate girders with a tapered girder profile. One of the main distinctive features of tapered steel plate girders is the significant slenderness of the web. In this paper, an analytical model to evaluate the shear capacity of tapered plate girders is presented. The model is based on diagonal tension field theory. The analytical formulation presented, obtained on the basis of numerical studies of plate instability and shear capacity, takes into account the real geometry of the tapered plate girder and the actual boundary conditions of the web panel. The shear model considers the bending stresses on the web panel, which appear as a result of the variation of the structural depth of the steel girder. Finally, analytical results of shear strength of tapered steel plate girders obtained using the proposed model are compared with those derived from the numerical model, which is based on the finite element method MH - Mexico|Queretaro MH - Spain PB - LONDON: THOMAS TELFORD PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Construction & Building Technology;Engineering, Civil U5 - J;Article AV - English IS - 0965-0911 UR - ISI:000224974700005 L2 - beams and girders;steel structures;stress analysis;WEB PANELS SO - Proceedings of the Institution of Civil Engineers-Structures and Buildings 2004 ;157(5):343-354 12876 UI - 6226 AU - Zarate RD AU - Quevedo H AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Calif Davis, Dept Phys, Davis, CA 95616, USAZarate, RD, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, POB 70-543, Mexico City 04510, DF, Mexico TI - Thermodynamic scheme of inhomogeneous perfect fluid mixtures AB - We analyse the compatibility between the geometrodynamics and thermodynamics of a binary mixture of perfect fluids which describe inhomogeneous cosmological models. We generalize the thermodynamic scheme of general relativity to include the chemical potential of the fluid mixture with non-vanishing entropy production. This formalism is then applied to the case of Szekeres and Stephani families of cosmological models. The compatibility conditions turn out to impose symmetry conditions on the cosmological models in such a way that only the limiting case of the Friedmann-Robertson-Walker model remains compatible. This result is an additional indication of the incompatibility between thermodynamics and relativity MH - Mexico|Distrito Federal MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics;Physics, Multidisciplinary;Physics, Particles & Fields U5 - J;Article AV - English IS - 0264-9381 UR - ISI:000188982000014 L2 - RELATIVISTIC COSMOLOGICAL MODELS; GENERAL-RELATIVITY; RADIATION; UNIVERSES; MATTER; TENSOR SO - Classical and Quantum Gravity 2004 ;21(1):197-205 12877 UI - 4851 AU - Zegbe JA AU - Behboudiana MH AU - Clothier BE AD - Massey Univ, Inst Nat Resources INR 433, Palmerston North, New ZealandHortResearch, Palmerston North, New ZealandZegbe, JA, Inst Nacl Invest Forestales Agricolas & Pecuarias, Campo Expt Zacatecas,Apartado Postal 18, Calera De VR 98500, Zacatecas, Mexico TI - Partial rootzone drying is a feasible option for irrigating processing tomatoes AB - World water supplies are limited and water-saving irrigation practices, such as partial rootzone drying (PRD), should be explored. We studied the effects of PRD, applied through furrow and drip irrigation, on plant water relations, yield, and the fruit quality of processing tomato (Lycopersicon esculentum Mill. cv. 'Petopride'). There were four treatments. The first two were: full irrigation by hand on both sides of the root system which mimicked furrow irrigation (FuI), and half of irrigation water in FuI given alternately only to one side of the root system with each irrigation (PRDFuI). The next two treatments were: full drip irrigation (DrI) to both sides of the root system, and half of irrigation water in DrI given alternately only to one side of the root system with each irrigation (PRDDrI). Leaf water potential was the same among the treatments except for the PRDFuI plants, which had the lowest midday values only in one sampling out of four. Photosynthetic rate was the same among the treatments except for the drip-inigated plants having the lowest value in one sampling out of four. Number of fruit, mean fruit mass of fruit, total fresh and dry mass of fruit, and harvest index were the same among treatments, but PRD plants had increased irrigation use efficiency compared to fully irrigated plants. There was no incidence of blossom-end rot in any of the treatments. PRDDrI fruit had redder colour and higher total soluble solids concentration. Advancement in fruit maturity and enhancement of quality could be achieved without detrimental effect on fresh and dry mass of fruit by application of PRD. Independent of the irrigation method, PRD treatments improved irrigation use efficiency by ca. 70%. PRD has the potential for use in processing tomato especially in environments with limited water. (C) 2004 Elsevier B.V. All rights reserved MH - Mexico|Zacatecas MH - New Zealand PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 13 U4 - Agronomy;Water Resources U5 - J;Article AV - English IS - 0378-3774 UR - ISI:000222939600002 L2 - Lycopersicon esculention;irrigation use efficiency;water saving;yield;fruit quality;fruit maturity advancement;DEFICIT IRRIGATION; FRUIT-QUALITY; WATER; YIELD SO - Agricultural Water Management 2004 ;68(3):195-206 12878 UI - 5382 AU - Zelaya-Angel O AU - Mendoza-Alvarez JG AU - Becerril M AU - Navarro-Contreras H AU - Tirado-Mejia L AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoUniv Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78280, MexicoUniv Quindio, Optoelect Labs, Armenia, Q, ColombiaZelaya-Angel, O, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, Mexico TI - On the bowing parameter in Cd1-xZnxTe AB - Cd1-xZnxTe thin films were prepared on 7059 Corning glass substrates using an rf magnetron sputtering system and CdTe(1-y)+ZnTe(y) targets. The concentration (x) of Zn in the films did not coincide with the relative weight (y) of the ZnTe powder in the compressed targets. Values of x were in the range 0-0.30 as determined from x-ray diffraction patterns. The band gap energy (E-g) of the Cd1-xZnxTe samples was calculated from the photoreflectance spectra measured on the films. The position of the experimental points in the E-g versus x plot show a deviation from the phenomenological quadratic relation E-g=E-g0+ax+bx(2) calculated within the virtual crystal approximation (VCA). The depart of the E-g values for higher Zn concentrations from the expected VCA model is probably due to a larger clustering of Zn atoms and/or a percolation phenomena. We obtain fitted values for the parameters a and b within the VCA approach. Comparison with data reported by other authors is made. (C) 2004 American Institute of Physics MH - Colombia MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000221657300048 L2 - VI-SEMICONDUCTOR ALLOYS; OPTICAL-PROPERTIES; THIN-FILMS; BAND-GAP; ENERGY; TE; SPECTROSCOPY; PERCOLATION; DEPENDENCE; SPECTRA SO - Journal of Applied Physics 2004 ;95(11):6284-6288 12879 UI - 4187 AU - Zenit R AU - Tsang YH AU - Koch DL AU - Sangani AS AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCornell Univ, Sch Chem Engn, Ithaca, NY 14853, USASyracuse Univ, Dept Chem Engn & Mat Sci, Syracuse, NY 13244, USAZenit, R, Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico TI - Shear flow of a suspension of bubbles rising in an inclined channel AB - A weak, laminar shear flow of a monodisperse suspension of high-Reynolds-number, low-Weber-number bubbles is studied in a novel experimental configuration. Nitrogen bubbles are formed through an array of small capillaries at the base of a tall channel with a small inclination from the vertical. The bubbles generate a unidirectional shear flow, in which the denser suspension near the bottom wall falls and the lighter suspension near the top wall rises. Profiles of the bubble and liquid velocities and the bubble volume fraction are obtained using hot-film and dual impedance probes. To our knowledge, measurements of the laminar shear properties of a nearly homogeneous bubble suspension have not previously been reported. A steady shear flow is observed in which the bubble velocity variation across the channel is typically less than 20% of the mean bubble velocity. The velocity and volume fraction gradients increase with channel inclination and exhibit little or no dependence on the mean gas volume fraction. To explain the magnitude of the volume fraction gradients, it is necessary to consider the effects of both the lift force and the effective bubble-phase diffusivity in balancing the segregating tendency of the cross-channel component of the buoyancy force. The bubble velocity gradient can be understood in terms of a balance of the component of the buoyancy force parallel to the channel walls and an effective viscosity associated with the Reynolds stresses produced by bubble-Induced liquid velocity fluctuations. Theories for bubbles rising with potential-flow hydrodynamic interactions predict an instability of the homogeneous state due to a negative Maxwell pressure. However, the hydrodynamic diffusivity inferred from our experiments is large enough to mitigate the clustering effects of the Maxwell pressure. Consistent with this, a vigorous instability of the homogeneous state of the bubble suspension is only observed at volume fractions larger than 5%-20% with the critical volume fraction depending on the angle of inclination MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mechanics;Physics, Fluids & Plasmas U5 - J;Article AV - English IS - 0022-1120 UR - ISI:000224396900010 L2 - LARGE REYNOLDS-NUMBERS; LIFT FORCE; AVERAGED EQUATIONS; VOID FRACTION; VERTICAL PIPE; LIQUID; VELOCITY; TURBULENCE; WATER; MOTION SO - Journal of Fluid Mechanics 2004 ;515():261-292 12880 UI - 6139 AU - Zepeda A AU - Sengpiel F AU - Guagnelli MA AU - Vaca L AU - Arias C AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoMax Planck Inst Neurobiol, D-82152 Munich, GermanyUniv Wales Coll Cardiff, Cardiff Sch Biosci, Cardiff CF10 3US, S Glam, WalesArias, C, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Biol Celular & Fisiol, Apartado Postal 70228, Mexico City 04510, DF, Mexico TI - Functional reorganization of visual cortex maps after ischemic lesions is accompanied by changes in expression of cytoskeletal proteins and NMDA and GABA(A) receptor subunits AB - Reorganization of cortical representations after focal visual cortex lesions has been documented. It has been suggested that functional reorganization may rely on cellular mechanisms involving modifications in the excitatory/inhibitory neurotransmission balance and on morphological changes of neurons peripheral to the lesion. We explored functional reorganization of cortical retinotopic maps after a focal ischemic lesion in primary visual cortex of kittens using optical imaging of intrinsic signals. After 1, 2, and 5 weeks postlesion (wPL), we addressed whether functional reorganization correlated in time with changes in the expression of MAP-2, GAP-43, GFAP, GABA(A) receptor subunit alpha1 (GABA(A)alpha1), subunit 1 of the NMDA receptor (NMDAR1), and in neurotransmitter levels at the border of the lesion. Our results show that: (1) retinotopic maps reorganize with time after an ischemic lesion; (2) MAP-2 levels increase gradually from 1wPL to 5wPL; (3) MAP-2 upregulation is associated with an increase in dendritic-like structures surrounding the lesion and a decrease in GFAP-positive cells; (4) GAP-43 levels reach the highest point at 2wPL; (5) NMDAR1 and glutamate contents increase in parallel from 1wPL to 5wPL; (6) GABA(A)alpha1 levels increase from 1wPL to 2wPL but do not change after this time point; and ( 7) GABA contents remain low from 1wPL to 5wPL. This is a comprehensive study showing for the first time that functional reorganization correlates in time with dendritic sprouting and with changes in the excitatory/inhibitory neurotransmission systems previously proposed to participate in cortical remodeling and suggests mechanisms by which plasticity of cortical representations may occur MH - Germany MH - Mexico|Distrito Federal MH - United Kingdom PB - WASHINGTON: SOC NEUROSCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Neurosciences U5 - J;Article AV - English IS - 0270-6474 UR - ISI:000189210300003 L2 - plasticity;visual cortex;sprouting;maps;ischemia;injury;imaging techniques;cat;retinotopy;receptors;photochemical lesion;unmasking;MICROTUBULE-ASSOCIATED PROTEIN-2; INDUCED CORTICAL INFARCTS; FOCAL CEREBRAL-ISCHEMIA; PRIMARY MOTOR CORTEX; ADULT-RATS; NEURONAL DAMAGE; STRIATE CORTEX; IN-VIVO; PLASTICITY; CAT SO - Journal of Neuroscience 2004 ;24(8):1812-1821 12881 UI - 3470 AU - Zhang Y AU - He ZH AU - Ye GY AU - Aimin Z AU - van Ginkel M AD - Minist Agr, CAAS, Inst Crop Breeding & Cultivat, Natl Wheat Improvement Ctr,Key Lab Crop Genet & B, Beijing 100081, Peoples R ChinaChinese Acad Agr Sci, CIMMYT China Off, Beijing 100081, Peoples R ChinaUniv Queensland, Sch Land & Food, Brisbane, Qld 4072, AustraliaChinese Acad Sci, Inst Genet & Dev Biol, Beijing 100101, Peoples R ChinaCIMMYT, Mexico City 06600, DF, MexicoHe, ZH, Minist Agr, CAAS, Inst Crop Breeding & Cultivat, Natl Wheat Improvement Ctr,Key Lab Crop Genet & B, Beijing 100081, Peoples R China TI - Effect of environment and genotype on bread-making quality of spring-sown spring wheat cultivars in China AB - Improvement of end-use quality in bread wheat depends on a thorough understanding of current wheat quality and the influences of genotype (G), environment (E), and genotype by environment interaction (G x E) on quality traits. Thirty-nine spring-sown spring wheat (SSSW) cultivars and advanced lines from China were grown in four agro-ecological zones comprising seven locations during the 1998 and 1999 cropping seasons. Data on 12 major bread-making quality traits were used to investigate the effect of G, E, and G x E on these traits. Wide range variability for protein quantity and quality, starch quality parameters and milling quality in Chinese SSSW was observed. Genotype and environment were found to significantly influence all quality parameters as major effects. Kernel hardness, flour yield, Zeleny sedimentation value and mixograph properties were mainly influenced by the genetic variance components, while thousand kernel weight, test weight, and falling number were mostly influenced by the environmental variance components. Genotype, environment, and their interaction had important effects on test weight, mixing development time and RVA parameters. Cultivars originating from Zone VI (northeast) generally expressed high kernel hardness, good starch quality, but poor milling and medium to weak mixograph performance; those from Zone VII (north) medium to good gluten and starch quality, but low milling quality; those from Zone VIII (central northwest) medium milling and starch quality, and medium to strong mixograph performance; those from Zone IX (western/southwestern Qinghai-Tibetan Plateau) medium milling quality, but poor gluten strength and starch parameters; and those from Zone X (northwest) high milling quality, strong mixograph properties, but low protein content. Samples from Harbin are characterized by good gluten and starch quality, but medium to poor milling quality; those from Hongxinglong by strong mixograph properties, medium to high milling quality, but medium to poor starch quality and medium to low protein content; those from Hohhot by good gluten but poor milling quality; those from Linhe by weak gluten quality, medium to poor milling quality; those from Lanzhou by poor bread-making and starch quality; those from Yongning by acceptable bread-making and starch quality and good milling quality; and those from Urumqi by good milling quality, medium gluten quality and good starch pasting parameters. Our findings suggest that Chinese SSSW quality could be greatly enhanced through genetic improvement for targeted well-characterized production environments MH - Australia MH - Mexico|Distrito Federal MH - Peoples R China PB - DORDRECHT: KLUWER ACADEMIC PUBL RP - NOT IN FILE U3 - TC 7 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0014-2336 UR - ISI:000226207600009 L2 - baking quality;bread wheat;genotype by environment interaction;genetic improvement;Triticum aestivum;RED WINTER-WHEAT; BAKING QUALITY SO - Euphytica 2004 ;139(1):75-83 12882 UI - 6221 AU - Zhang YJ AU - Borders BE AU - Will RE AU - Posadas HD AD - Univ Georgia, DB Warnell Sch Forest Resources, Athens, GA 30602, USACol Postgraduados, Programa Forestal, Mexico City 56230, DF, MexicoZhang, YJ, Univ Georgia, DB Warnell Sch Forest Resources, Athens, GA 30602 USA TI - A model for foliage and branch biomass prediction for intensively managed fast growing loblolly pine AB - Prediction models of foliage and branch biomass were derived based on the foliage distribution within the crown and the pipe model theory. Resulting models were fitted to data collected from intensively managed loblolly pine (Pinus taeda L.) plantations in the Lower Coastal Plain and Piedmont of Georgia. We found that diameter outside bark at the base of the live crown, crown height, and crown length are key predictors of foliage biomass. Together they produce reliable predictions of foliage and branch biomass for stands managed under a wide array of silvicultural treatments. The model indicates that an annual fertilization treatment significantly increased foliage and branch biomass in the Lower Coastal Plain. However, in the Piedmont, complete control of competing vegetation significantly increased foliage and branch biomass. A significant fertilization-age interaction for foliage and branch biomass was also detected in Piedmont stands MH - USA MH - Mexico|Distrito Federal PB - BETHESDA: SOC AMER FORESTERS RP - NOT IN FILE U3 - TC 4 U4 - Forestry U5 - J;Article AV - English IS - 0015-749X UR - ISI:000188962300008 L2 - maxima function;gamma distribution;mixed model;COMPATIBLE VOLUME; SLASH PINE; UNITED-STATES; TAPER MODELS; LEAF-AREA; SYSTEM; CANOPY; PATTERNS; TREES; DISTRIBUTIONS SO - Forest Science 2004 ;50(1):65-80 12883 UI - 5582 AU - Zharikov SV AU - Shibanov YA AU - Mennickent RE AU - Komarova VN AU - Koptsevich AB AU - Tovmassian GH AD - UNAM, Inst Astron, Observ Astron Nacl SPM, Ensenada, Baja California, MexicoAF Ioffe Phys Tech Inst, St Petersburg 194021, RussiaConcepcion Univ, Dept Fis, Concepcion, ChileRussian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, RussiaIsaac Newton Inst Chile, SAO Branch, St Petersburg, RussiaZharikov, SV, UNAM, Inst Astron, Observ Astron Nacl SPM, Ensenada, Baja California, Mexico TI - Multiband optical observations of the old PSR B0950+08 AB - We report on deep UBVRI-imaging of the field of the 17.3 Myr radiopulsar PSR B0950+08 obtained with the ESO/VLT/FORS1. Firm detection of the candidate pulsar optical counterpart in the BVRI bands with the magnitudes B = 27.06 +/- 0.35, V = 27.05 +/- 0.15, R-c = 26.49 +/- 0.10 and I-c = 26.20 +/- 0.17 enabled us to study, for the first time, the broadband spectrum of the object. The derived similar to0."24 offset of the object from the radiopulsar position is insignificant within the 0."21 uncertainties of our astrometry and similar to0."75 seeing value during the observations. The positional coincidence and unusual colors of the candidate ensure us that we likely detect the optical emission from PSR B0950+08. The optical-near-UV spectrum of the pulsar has a negative slope and can be fitted by a power law F-nu proportional to nu(-alpha) with alpha = 0.65 +/- 0.40, suggesting nonthermal emission. Within errors the optical flux is consistent with the power law fit of the ROSAT spectrum from the X-ray counterpart. We analyze our results together with the available multiwavelength data on other isolated pulsars of different ages detected in the optical range and find a significant correlation between their optical and 2-10 keV X-ray luminosities. This implies an origin of the nonthermal emission in both spectral domains. These objects show a significantly non-monotonic evolution of the efficiency of the optical-X-ray photon production from the pulsar spindown power, with a pronounced minimum at the beginning of the middle-age epoch and comparably high efficiencies of younger and older pulsars. This suggests different sensitivities of the photon production processes to the Goldreich-Julian current in magnetospheres of different age pulsars MH - Chile MH - Mexico|Baja California MH - Russia PB - LES ULIS CEDEXA: E D P SCIENCES RP - NOT IN FILE U3 - TC 11 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000221299400024 L2 - stars : pulsars : general;stars : pulsars : individual : PSR B0950+08;stars : neutron;X-RAY; VELA PULSAR; PARALLAX OBSERVATIONS; POWERED PULSARS; PSR B0656+14; TELESCOPE; EMISSION; STARS; PHOTOMETRY; SPECTRUM SO - Astronomy & Astrophysics 2004 ;417(3):1017-1030 12884 UI - 4860 AU - Zhou XD AU - De Beer ZW AU - Cibrian D AU - Wingfield BD AU - Wingfield MJ AD - Univ Pretoria, FABI, TPCP, Dept Genet Forestry & Agr Biotechnol, Pretoria, South AfricaUniv Pretoria, FABI, Dept Microbiol & Plant Pathol, Pretoria, South AfricaUniv Autonoma Chapingo, Div Ciencias Forestales, Chapingo, MexicoZhou, XD, Univ Pretoria, FABI, TPCP, Dept Genet Forestry & Agr Biotechnol, Pretoria, South Africa TI - Characterisation of Ophiostoma species associated with pine bark beetles from Mexico, including O-pulvinisporum sp nov AB - Bark beetles (Coleoptera : Scolytidae) are common vectors of Ophiostoma species. These fungi include primary tree pathogens and important sapstain agents. In Mexico, Ips calligraphus and Dendroctonus mexicanus occur on many species of pine. Pinus maximinoi and P. pseudostrobus are the hosts of both species of insects. Little research has been done on ophiostomatoid fungi associated with pine bark beetles in Mexico. We recently obtained specimens of these bark beetles and their galleries from Mexico. The aim of the study was to isolate and identify Ophiostoma species associated with the two beetle species. In total, six ophiostomatoid species were found to be associated with them. These included Ceratoeystiopsis minuta, Ophiostoma pluriannulatum, an O. galcifortnis-like species, two unidentified Sporothrix spp., as well as a new species similar to O. adjuncti, O. ips, and O. niontitun, that we name as O. pulvinisporum sp. nov MH - Mexico|Estado De Mexico MH - South Africa PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Mycology U5 - J;Article AV - English IS - 0953-7562 UR - ISI:000222854300012 L2 - FUNGI; COMPLEX; CERATOCYSTIS; SCHENCKII; PHYLOGENY; IPS; DNA SO - Mycological Research 2004 ;108():690-698 12885 UI - 5192 AU - Zhu XS AU - Zamudio FZ AU - Olbinski BA AU - Possani LD AU - Valdivia CH AD - Univ Wisconsin, Sch Med, Dept Physiol, Madison, WI 53706, USANatl Autonomous Univ Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Cuernavaca 62271, Morelos, MexicoZhu, XS, Massachusetts Gen Hosp, Dept Anesthesia & Crit Care, 149 13th St,CYN-4,CVRC 4201, Charlestown, MA 02129 USA TI - Activation of skeletal ryanodine receptors by two novel scorpion toxins from Buthotus judaicus AB - Buthotus judaicus toxin 1 (BjTx-1) and toxin 2 (BjTx-2), two novel peptide activators of ryanodine receptors (RyR), were purified from the venom of the scorpion B. judaicus. Their amino acid sequences differ only in 1 residue out of 28 ( residue 16 corresponds to Lys in BjTx-1 and Ile in BjTx-2). Despite a slight difference in EC50, both toxins increased binding of [H-3] ryanodine to skeletal sarcoplasmic reticulum at micromolar concentrations but had no effect on cardiac or liver microsomes. Their activating effect was Ca2+-dependent and was synergized by caffeine. B. judaicus toxins also increased binding of [ 3H] ryanodine to the purified RyR1, suggesting that a direct protein-protein interaction mediates the effect of the peptides. BjTx-1 and BjTx-2 induced Ca2+ release from Ca2+-loaded sarcoplasmic reticulum vesicles in a dose-dependent manner and induced the appearance of long lived subconductance states in skeletal RyRs reconstituted into lipid bilayers. Three-dimensional structural modeling reveals that a cluster of positively charged residues (Lys(11) to Lys(16)) is a prominent structural motif of both toxins. A similar structural motif is believed to be important for activation of RyRs by imperatoxin A (IpTx(a)), another RyR-activating peptide (Gurrola, G. B., Arevalo, C., Sreekumar, R., Lokuta, A. J., Walker, J. W., and Valdivia, H. H. (1999) J. Biol. Chem. 274, 7879 - 7886). Thus, it is likely that B. judaicus toxins and imperatoxin A bind to RyRs by means of electrostatic interactions that lead to massive conformational changes in the channel protein. The different affinity and structural diversity of this family of scorpion peptides makes them excellent peptide probes to identify RyR domains that trigger the channel to open MH - USA MH - Mexico|Morelos PB - BETHESDA: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC RP - NOT IN FILE U3 - TC 5 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0021-9258 UR - ISI:000222003000084 L2 - II-III-LOOP; MUSCLE DIHYDROPYRIDINE RECEPTOR; CA2+ RELEASE CHANNEL; SARCOPLASMIC-RETICULUM; CARDIAC-MUSCLE; CA2+-RELEASE CHANNEL; PANDINUS-IMPERATOR; POTASSIUM CHANNEL; PEPTIDE; VENOM SO - Journal of Biological Chemistry 2004 ;279(25):26588-26596 12886 UI - 4078 AU - Zicovich-Wilson CM AU - Pascale F AU - Roetti C AU - Saunders VR AU - Orlando R AU - Dovesi R AD - Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-10125 Turin, ItalyUniv Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62210, Morelos, MexicoUniv Turin, Dipartimento Chim IFM, I-10125 Turin, ItalyINFM, Unita Torino, Sez F, I-10125 Turin, ItalyOrlando, R, Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Cso Borsalino 54, I-10125 Turin, Italy TI - Calculation of the vibration frequencies of alpha-quartz: The effect of Hamiltonian and basis set AB - The central-zone vibrational spectrum of alpha-quartz (SiO2) is calculated by building the Hessian matrix numerically from the analytical gradients of the energy with respect to the atomic coordinates. The nonanalytical part is obtained with a finite field supercell approach for the high-frequency dielectric constant and a Wannier function scheme for the evaluation of Born charges. The results obtained with four different Hamiltonians, namely Hartree-Fock, DFT in its local (LDA) and nonlocal gradient corrected (PBE) approximation, and hybrid B3LYP, are discussed, showing that B3LYP performs far better than LDA and PBE, which in turn provide better results than HF, as the mean absolute difference from experimental frequencies is 6, 18, 21, and 44 cm(-1), respectively, when a split valence basis set containing two sets of polarization functions is used. For the LDA results, comparison is possible with previous calculations based on the Density Functional Perturbation Theory and usage of a plane-wave basis set. The effects associated with the use of basis sets of increasing size are also investigated. It turns out that a split valence plus a single set of d polarization functions provides frequencies that differ from the ones obtained with a double set of d functions and a set off functions on all atoms by on average less than 5 cm(-1). (C) 2004 Wiley Periodicals, Inc MH - Italy MH - Mexico|Morelos PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 23 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0192-8651 UR - ISI:000224666200009 L2 - vibration frequencies;alpha-quartz;Hartree-Fock;LDA;PBE;B3LYP;basis set;FUNCTIONAL PERTURBATION-THEORY; HARTREE-FOCK GRADIENTS; PERIODIC-SYSTEMS; SILICA SURFACE; CRYSTAL CODE; AB-INITIO; IMPLEMENTATION; POLYMORPHS; CONSTANT; EXCHANGE SO - Journal of Computational Chemistry 2004 ;25(15):1873-1881 12887 UI - 6639 AU - Zimbelman DR AU - Watters RJ AU - Firth IR AU - Breit GN AU - Carrasco-Nunez G AD - GO Log, White Salmon, WA 98672, USAUniv Nevada, Dept Geol Sci MS 172, Reno, NV 89557, USAUNAM, Unidad Invest Ciencias Tierra, Ctr Queretaro 76001, MexicoZimbelman, DR, GO Log, POB 1878, White Salmon, WA 98672, USA TI - Stratovolcano stability assessment methods and results from Citlaltepetl, Mexico AB - Citlaltepetl volcano is the easternmost stratovolcano in the Trans-Mexican Volcanic Belt. Situated within 110 km of Veracruz, it has experienced two major collapse events and, subsequent to its last collapse, rebuilt a massive, symmetrical summit cone. To enhance hazard mitigation efforts we assess the stability of Citlaltepetl's summit cone, the area thought most likely to fail during a potential massive collapse event. Through geologic mapping, alteration mineralogy, geotechnical studies, and stability modeling we provide important constraints on the likelihood, location, and size of a potential collapse event. The volcano's summit cone is young, highly fractured, and hydrothermally altered. Fractures are most abundant within 5-20-m wide zones defined by multiple parallel to subparallel fractures. Alteration is most pervasive within the fracture systems and includes acid sulfate, advanced argillic, argillic, and silicification ranks. Fractured and altered rocks both have significantly reduced rock strengths, representing likely bounding surfaces for future collapse events. The fracture systems and altered rock masses occur non-uniformly, as an orthogonal set with N-S and E-W trends. Because these surfaces occur non-uniformly, hazards associated with collapse are unevenly distributed about the volcano. Depending on uncertainties in bounding surfaces, but constrained by detailed field studies, potential failure volumes are estimated to range between 0.04-0.5 km(3). Stability modeling was used to assess potential edifice failure events. Modeled failure of the outer portion of the cone initially occurs as an 'intact block' bounded by steeply dipping joints and outwardly dipping flow contacts. As collapse progresses, more of the inner cone fails and the outer 'intact' block transforms into a collection of smaller blocks. Eventually, a steep face develops in the uppermost and central portion of the cone. This modeled failure morphology mimics collapse amphitheaters present at many of the world's stratovolcanoes that have experienced massive failure events MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER-VERLAG RP - NOT IN FILE U3 - TC 7 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000187548400005 L2 - Citlaltepetl volcano;edifice stability;geotechnical rock strength;hydrothermal alteration;stability modeling;PICO-DE-ORIZABA; ORE-DEPOSITS; VOLCANO; COLLAPSE; FLOW SO - Bulletin of Volcanology 2004 ;66(1):66-79 12888 UI - 5527 AU - Zolotukhin M AU - Fomine S AU - Salcedo R AU - Khalilov L AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoInst Oil Chem & Catalysis, Ufa 450054, RussiaZolotukhin, M, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360,CU, Mexico City 04510, DF, Mexico TI - Remarkable enhancement of reactivity of carbonyl compounds for polymerizations with non-activated aromatic hydrocarbons AB - Reaction of carbonyl compounds bearing electron-withdrawing substituents with non-activated aromatic hydrocarbons proceeds selectively in trifluoromethanesulfonic acid (TFSA) at room temperature to give linear, high-molecular-weight polymers MH - Mexico|Distrito Federal MH - Russia PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000221455300057 L2 - CARBOCATIONS SO - Chemical Communications 2004 ;(8):1030-1031 12889 UI - 4923 AU - Zolotukhin MG AU - Fomina L AU - Salcedo R AU - Sansores LE AU - Colquhoun HM AU - Khalilov LM AD - Natl Autonomous Univ Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Reading, Sch Chem, Whiteknights, EnglandInst Oil Chem & Catalysis, Ufa 450054, RussiaZolotukhin, MG, Natl Autonomous Univ Mexico, Inst Invest Mat, Apartado Postal 70-360,CU, Mexico City 04510, DF, Mexico TI - Superelectrophiles in polymer chemistry. A novel, one-pot synthesis of high-T-g, high-temperature polymers MH - United Kingdom MH - Mexico|Distrito Federal MH - Russia PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000222571000003 L2 - FRIEDEL-CRAFTS REACTIONS; PRECIPITATION POLYCONDENSATION; ELECTROPHILES; POLYKETONES; DICATIONS SO - Macromolecules 2004 ;37(14):5140-5141 12890 UI - 5925 AU - Zolotukhin MG AU - Fomine S AU - Colquhoun HM AU - Zhu ZX AU - Drew MGB AU - Olley RH AU - Fairman RA AU - Williams DJ AD - Univ Nacl Autonoma Mexico, Inst Invest & Mat, Mexico City 04510, DF, MexicoUniv Reading, Sch Chem, Reading RG6 6AD, Berks, EnglandUniv Reading, JJ Thomson Phys Lab, Reading RG6 6AF, Berks, EnglandUniv Manchester, Dept Chem, Manchester M13 9PL, Lancs, EnglandUniv London Imperial Coll Sci Technol & Med, Dept Chem, Chem Crystallog Lab, London SW7 2AY, EnglandZolotukhin, MG, Univ Nacl Autonoma Mexico, Inst Invest & Mat, Apartado Postal 70-360,CU, Mexico City 04510, DF, Mexico TI - Rapid, uncatalyzed ring-opening polymerization of individual macrocyclic poly(arylene thioether ketone)s under dynamic heating conditions AB - Uncatalyzed, ring-opening polymerization of individual macrocyclic poly(arylene thioether ketone)s (1-4) and mixtures (5) under dynamic heating conditions has been demonstrated for the first time. High-molecular-weight, film-forming products were obtained after heating of the macrocycles up to 480 degreesC, with a heating rate of 10-20 degreesC /min. Depending on the macrocyclic structure and heat treatment conditions, the polymers obtained were amorphous or semicrystalline, soluble or slightly crosslinked. NMR analyses of the soluble polymers revealed their linear, highly regular structure. According to NMR, DSC, and TGA studies, the polymers obtained do not contain any residual macrocycles. The polymers with thio-p-arylene moieties in the main chain were thermally stabile. The catalyzed ring opening polymerization of 5 carried out in diphenyl sulfone solution is also reported for comparison. Using quantum mechanical calculations of the ring opening of macrocycles, a reaction mechanism is suggested. Preparation of nanosized poly(thioether ketone) fibrils by a replication method is described MH - United Kingdom MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000220288400011 L2 - POLY(ETHER ETHER KETONE); MELTING BEHAVIOR; TOPOLOGICAL CONSTRAINTS; DISULFIDE) OLIGOMERS; CRYSTALLIZATION; POLYMERS; SULFIDE); PRECURSORS; DENSITY; POLYCARBONATE SO - Macromolecules 2004 ;37(6):2041-2053 12891 UI - 4697 AU - Zonana-Nacach A AU - Jimenez-Balderas FJ AD - Inst Mexicano Seguro Social, Dept Rheumatol, Hosp Gen Reg 20, Tijuana, Baja California, MexicoIMSSI, Ctr Med Nacl Siglo XXI, Hosp Especialidades, Dept Rheumatol, Mexico City, DF, MexicoZonana-Nacach, A, POB 986, Imperial Beach, CA 91933, USA TI - Avascular necrosis of bone associated with primary antiphospholipid syndrome - Case report and literature review AB - We describe, the case of a 34-year-old mestizo Mexican woman with previous history of fetal loss, deep vein thrombosis that developed avascular necrosis (AVN) of the right knee with strong positive levels of anticardiolipin antibodies (aCL) IgG and IgM. AVN of bone in association with aCL has been seen principally in systemic lupus erythematosus patients. However, few cases have been reported of AVN as a clinical manifestation of primary antiphospholipid syndrome. A review of the association of aCL and AVN in patients with systemic lupus erythematosus, primary antiphospholipid syndrome, and idiopathic osteonecrosis is presented MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Rheumatology U5 - J;Article AV - English IS - 1076-1608 UR - ISI:000223296600010 L2 - avascular necrosis of bone;primary antiphospholipid syndrome;SYSTEMIC-LUPUS-ERYTHEMATOSUS; ANTICARDIOLIPIN ANTIBODIES; FEMORAL-HEAD; RISK-FACTORS; OSTEONECROSIS; DISEASE; CLASSIFICATION; ABNORMALITIES; CRITERIA SO - Jcr-Journal of Clinical Rheumatology 2004 ;10(4):214-217 12892 UI - 6019 AU - Zoz H AU - Jaramillo D AU - Tian Z AU - Trindade B AU - Ren H AU - Chimal V AU - De La Torre SD AD - Zoz GmbH, D-57482 Wenden, GermanyNatl Polytech Inst, ESIQIE, Mexico City 07300, DF, MexicoCent Iron & Steel Res Inst, Powder Met & Environm Technol Div, Beijing 100081, Peoples R ChinaUniv Coimbra, FCTUC, P-3030 Coimbra, PortugalAdv Mat Res Ctr CIMAV SC, Chihuahua 31109, MexicoZoz, H, Zoz GmbH, D-57482 Wenden, Germany TI - High performance cements and advanced ordinary Portland cement manufacturing by HEM-refinement and activation AB - High Energy Milling (HEM) applied for the grinding of cement leads to substantial refinement (< 2 mum) and mechanical activation of the powder particles. Preliminary studies have shown that this can result in a faster setting time, a faster curing time and in increased mechanical properties. Due to the far shorter grinding process at far higher energy efficiency and due to an expected significant saving in production space, an economically advanced manufacturing process of cement seems to be offered by HEM. The key question of whether HEM is available and can be scaled up for the large amount of material produced in the cement industry can be answered positively since the high kinetic semi-continuous processing route based on a carrier-gas in compression mode has been introduced. This paper presents the results of preliminary studies, explains the novel technique and suggests the way to commercial application MH - Germany MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Peoples R China MH - Portugal PB - WALLUF: BAUVERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Construction & Building Technology;Materials Science, Multidisciplinary U5 - J;Article AV - German IS - 0949-0205 UR - ISI:000189314000014 SO - Zkg International 2004 ;57(1):60-70 12893 UI - 3984 AU - Zubizarreta EH AU - Poitevin A AU - Levin CV AD - IAEA, Div Human Hlth, Dept Nucl Applicat, Sect Appl Radiat Biol & Radiotherapy, Vienna, AustriaCtr Hosp Pereira Rossell, Inst Radiol, Montevideo 11100, UruguayCtr Hosp Pereira Rossell, Ctr Lucha Canc, Montevideo 11100, UruguayInst Nacl Cancerol, INCAN, Mexico City, DF, MexicoZubizarreta, EH, IAEA, Div Human Hlth, Dept Nucl Applicat, Sect Appl Radiat Biol & Radiotherapy, Vienna, Austria TI - Overview of radiotherapy resources in Latin America: a survey by the International Atomic Energy Agency (IAEA) AB - Background and purpose: An analysis of the resources for radiotherapy in Latin America was done to establish a baseline to help plan future development in the region. Patients and methods: The data from 19 countries were obtained during three International Atomic Energy Agency (IAEA) regional meetings. The survey covered radiotherapy centres, major equipment and personnel. The centres were categorised into four different levels. Data were related to economic and population indices. Results: Four hundred and seventy centres were identified in 18 countries. Centres were divided into 4 levels: half were included in level 1, 25% in level 2 and 18% in level 0 (stand alone teletherapy machines). Human resource represents 933 radiation oncologists, 357 physicists and 2326 radiation therapy technologists. In general, availability of equipment and personnel was related to economic status of the country. Conclusions: Although there is a shortfall of equipment, the major restriction to patient service is an insufficient number of specialists in 16 of the 18 countries. An upgrade of standards in many centres is required to offer a comprehensive radiation oncology service. The information provided in this paper represents a useful base to plan future development in terms of equipment installation and training programs. (C) 2004 Published by Elsevier Ireland Ltd MH - Austria MH - Mexico|Distrito Federal MH - Uruguay PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Oncology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0167-8140 UR - ISI:000224709800013 L2 - radiotherapy;developing countries;equipment and supplies;health care facilities;manpower and services;economics;RADIATION-THERAPY SO - Radiotherapy and Oncology 2004 ;73(1):97-100 12894 UI - 1573 AU - Abatal M AU - Chavira E AU - Filippini C AU - Garcia-Vazquez V AU - Perez JC AU - Tholence JL AU - Noel H AD - UNAM, IIM, Mexico City 04510, DF, MexicoCNRS, LEPES, F-38048 Grenoble, FranceBUAP, IF LRT, Puebla 72570, MexicoLCSIM, F-35042 Rennes, FranceChavira, E, UNAM, IIM, AP 70-360, Mexico City 04510, DF, Mexico TI - The effect of annealing time in oxygen flux on the electric properties of the Ru(Sr2-xCax)GdCu2O8 +/- z system with 0.0 < x < 2.0, prepared at ambient pressure AB - A solid-state reaction method for synthesis of Ru(Sr2-xCax)GdCu2O8 +/- z system within the composition range of 0.0 < x < 2.0, at ambient pressure and within the range of 960-1070 degrees C is reported. The temperature interval for the preparation of the solid solution is determined by differential thermal analysis (DTA) in air. A solid solution is shown to exist up to x = 0.1, with a crystalline structure that is isomorphous to RuSr2GdCu2O8 (Ru-1212) compound observed by X-ray powder diffraction (XRD). The studies by the scanning electron microscopy (SEM) technique gives a particle size around 1-6 mu m. The results of transmission electron microscopy (TEM) studies confirm the tetragonal unit cell of Ru(S2-xCax)GdCu2O8 +/- z system. The temperature dependence of the electrical resistivity of the samples annealed in oxygen flux for 12 and 41 h, respectively at T = 960 degrees C shows a semiconductor behavior. (c) 2005 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0921-4534 UR - ISI:000230805700011 L2 - synthesis;XRD;SEM;TEM;electric resistivity;SUPERCONDUCTING FERROMAGNET RUSR2GDCU2O8; MAGNETIC-PROPERTIES; GD; TRANSITIONS; COEXISTENCE; COMPOUND; PHASES; EU SO - Physica C-Superconductivity and Its Applications 2005 ;424(1-2):85-91 12895 UI - 1981 AU - Abazov V AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Ahmed SN AU - Alexeev GD AU - Alton A AU - Alves GA AU - Arnoud Y AU - Avila C AU - Babintsev VV AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett KF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bojko NI AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burtovoi VS AU - Butler JM AU - Canelli F AU - Carvalho W AU - Casey D AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Chekulaev SV AU - Cho DK AU - Choi S AU - Chopra S AU - Claes D AU - Clark AR AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira V AU - Engelmann R AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Galyaev AN AU - Gao M AU - Gavrilov V AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Huang Y AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jain V AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kesisoglou S AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Kuznetsov VE AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mattingly SEK AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Melnitchouk A AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Narain M AU - Narasimharn VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nelson S AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Oshima N AU - Padley P AU - Parashar N AU - Partridge R AU - Parua N AU - Patwa A AU - Peters O AU - Petroffe P AU - Piegaia R AU - Pope BG AU - Prosper HB AU - Protopopescu S AU - Reay NW AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN3P3, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Gif Sur Yvette, FranceUniv Freiburg, Inst Phys, Freiburg, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, V, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Helicity of the W boson in lepton plus jets t(t)over-bar events AB - We examine properties of t (t) over bar candidate events in lepton +jets final states to establish the helicities of W bosons in t -> W + b decays. Our analysis is based on a direct calculation of a probability density for each event to correspond to a t (t) over bar final state, as a function of the helicity of the W boson. Using the 125 events/pb of data collected by the DO experiment at the Fermilab Tevatron p (p) over bar Collider at root s- = 1.8 TeV, we obtain a longitudinal helicity fraction F-0 = 0.56 +/- 0.3 1, consistent with the prediction of F-0 = 0.70 from the standard model. (c) 2005 Elsevier B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000229808400001 L2 - TOP-QUARK; HADRON COLLIDERS; COLLISIONS; DETECTOR SO - Physics Letters B 2005 ;617(1-2):1-10 12896 UI - 775 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begalli M AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burke S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Das M AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay A AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kado MM AU - Kafer D AD - Univ Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, IN2P3, CNRS, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 04, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particles, Saclay, FranceUniv Strasbourg 1, CNRS, IReS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, Inst Phys Nucl, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, FOM Inst NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF H, Nijmegen, NetherlandsDubna Joint Nucl Res Inst, Dubna 141980, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77251, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil TI - Measurement of the t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.96 TeV using lepton plus jets events with lifetime b-tagging AB - We present a measurement of the top quark pair (t (t) over bar) production cross section (sigma(t (t) over bar)) in pp collisions at root s = 1.96 TeV using 230 pb(-1) of data collected by the DO experiment at the Fermilab Tevatron Collider. We select events with one charged lepton (electron or muon), missing transverse energy, and jets in the final state. We employ lifetime-based b-jet identification techniques to further enhance the t F purity of the selected sample. For a top quark mass of 175 GeV, we measure sigma(t (t) over bar) 8.6(-1.5)(+1.6) (stat. + syst.) +/- 0.6(lumi.) pb, in agreement with the standard model expectation. (c) 2005 Published by Elsevier B.V MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 22 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000232859700005 L2 - TOP-QUARK PRODUCTION; PHYSICS SO - Physics Letters B 2005 ;626():35-44 12897 UI - 776 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begalli M AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burke S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Das M AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - Cruz-Burelo ED AU - Martins CD AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay A AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kado MM AU - Kafer D AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Clermont Ferrand, IN2P3, CNRS, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, Lab Phys Subatom & Cosmol, IN2P3, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, Lab Accelerateur Lineaire, CPPM, Orsay, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, Orsay, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, Inst Phys Nucl, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Munich, Mainz, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, FOM Inst, NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsDubna Joint Nucl Res Inst, Dubna 141980, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USAUniv Oklahoma, Norman, OK 73019, USALangston Univ, Langston, OK 73050, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Measurement of the t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.96 TeV using kinematic characteristics of lepton plus jets events AB - We present a measurement of the top quark pair (t (t) over bar) production cross section (sigma(t (t) over bar)) in pp collisions at a center-of-mass energy of 1.96 TeV using 230 pb(-1) of data collected by the DO detector at the Fermilab Tevatron Collider. We select events with one charged lepton (electron or muon), large missing transverse energy, and at least four jets, and extract the t (t) over bar content of the sample based on the kinematic characteristics of the events. For a top quark mass of 175 GeV, we measure sigma(t (t) over bar) 6.7(-1.3)(+1.4)(stat)(-1.1)(+1.6)(syst) +/- 0.4(lumi) pb, in good agreement with the standard model prediction. (c) 2005 Elsevier B.V. All rights reserved MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 19 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000232859700006 L2 - PHYSICS SO - Physics Letters B 2005 ;626():45-54 12898 UI - 777 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begalli M AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burke S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Das M AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay A AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kafer D AU - Kado MM AD - Univ Alberta, Edmonton, AB, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaMcGill Univ, Montreal, PQ, CanadaAcad Sinica, Inst High Energy Phys, Beijing, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Mulhouse, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, Inst Phys Nucl, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Bonn, Inst Phys, Freiburg, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, FOM Inst, NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, Nijmegen, NetherlandsDubna Joint Nucl Res Inst, Dubna 141980, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Royal Inst Technol, Lund, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Alberta, Edmonton, AB, Canada TI - Measurement of the t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.96 TeV in dilepton final states AB - We present a measurement of the top quark pair (a) production cross section in pp collisions at root s = 1.96 TeV using events with two charged leptons in the final state. This analysis utilizes an integrated luminosity of 224-243 pb(-1) collected with the DO detector at the Fermilab Tevatron Collider. We observe 13 events in the e(+)e(-), e mu and mu(+)mu(-) channels with an expected background of 3.2 +/- 0.7 events. For a top quark mass of 175 GeV, we measure a t (t) over bar production cross section of sigma(t (t) over bar) = 8.6(-2.7)(+3.2) (stat) +/- 1.1(syst) +/- 0.6(lumi) pb, consistent with the standard model prediction. (c) 2005 Elsevier B.V. All rights reserved MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000232859700007 L2 - TOP-QUARK; B-QUARK; DETECTOR; PHYSICS SO - Physics Letters B 2005 ;626():55-64 12899 UI - 853 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Bagby L AU - Baldin B AU - Balm PW AU - Banerjee P AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begalli M AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burke S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Das M AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveira Martins C AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay A AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, IN2P3, CNRS, Clermont Ferrand, FranceUniv Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, F-91405 Orsay, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, IReS, IN2P3, CNRS, Mulhouse, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Amsterdam, FOM, Inst NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenStockholm Univ, Royal Inst Technol, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Search for large extra spatial dimensions in dimuon production with the D0 detector AB - We present the results of a search for the effects of large extra spatial dimensions in p (p) over bar collisions at root s = 1: 96 TeV in events containing a pair of energetic muons. The data correspond to 246 pb(-1) of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider. Good agreement with the expected background was found, yielding no evidence for large extra dimensions. We set 95% C. L. lower limits on the fundamental Planck scale between 0.85 and 1.27 TeV within several formalisms. These are the most stringent limits achieved in the dimuon channel to date MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000232558400010 L2 - GRAVITY; TEV; MILLIMETER SO - Physical Review Letters 2005 ;95(16): 12900 UI - 854 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Arov M AU - Askew A AU - Asman B AU - ssis Jesus ACS AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Bagby L AU - Baldin B AU - Balm PW AU - Banerjee P AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begalli M AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burke S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Das M AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveira Martins C AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay A AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague 12, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediteranee, CNRS, CPPM, IN2P3, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 05, CNRS, IN2P3, LPNHE, F-75270 Paris, FranceUniv Paris 07, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Gif Sur Yvette, FranceUniv Strasbourg 1, IReS, CNRS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3 A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Measurement of the lifetime difference in the B-s(0) system AB - We present a study of the decay B-s(0)-> J/psi phi. We obtain the CP-odd fraction in the final state at time zero R-perpendicular to = 0.16 +/- 0.10 (stat) +/- 0.02(syst), the average lifetime of the (B-s(0), (B) over bar (0)(s)) system, (tau) over bar (B-s(0)) = 1.39(-0.16)(+0.13)(stat)(-0.02)(+0.01)(syst) ps, and the relative width difference between the heavy and light mass eigen-states, Delta Gamma/(Gamma) over bar = (Gamma(L) - Gamma(H))/(Gamma) over bar = 0.24(-0.38)(+0.28)(stat)(-0.04)(+0.03)(syst). With the additional constraint from the world average of the B-s(0) lifetime measurements using semileptonic decays, we find (tau) over bar (B-s(0)) = 1.39 +/- 0.06 ps and Delta Gamma/(Gamma) over bar = 0.25(-0.15)(+0.14). For the ratio of the B-s(0) and B-0 lifetimes we obtain (tau) over bar (B-s(0))/tau(B-s(0)) = 0.91 +/- 0.09(stat) +/- 0.003(syst) MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000232724400020 L2 - PHYSICS; DECAYS SO - Physical Review Letters 2005 ;95(17): 12901 UI - 855 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - ssis Jesus ACS AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Bagby L AU - Baldin B AU - Balm PW AU - Banerjee P AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begalli M AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burke S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Das M AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveira Martins C AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay A AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaUniv Alberta, Edmonton, AB, CanadaMcGill Univ, Montreal, PQ, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ Prague, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ Prague, CR-16635 Prague, Czech RepublicAcad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, Accelerateur Lineaire Lab, IN2P3, F-91405 Orsay, FranceUniv Paris 06, CNRS, LPNHE, Paris, FranceUniv Paris 07, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Gif Sur Yvette, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUnit Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3 A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyJohannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Measurement of semileptonic branching fractions of B mesons to narrow D-** states - art. no. 1711803 AB - Using the data accumulated in 2002-2004 with the D0 detector in proton-antiproton collisions at the Fermilab Tevatron collider with a center-of-mass energy of 1.96 TeV, the branching fractions of the decays B ->(D) over bar (0)(1)(2420)mu(+)nu(mu)X and B ->(D) over bar (*0)(2)(2460)mu(+)nu(mu)X and their ratio have been measured: B (b) over bar -> B)xB(B -> (D) over bar (0)(1)mu(+)nu(mu)X)xB((D) over bar (0)(1)-> D(*-)pi(+))=[0.087 +/- 0.007(stat)+/- 0.014(syst)]%; B((b) over bar -> B)xB(B ->(D) over bar (*0)(2)mu(+)nu(mu)X)xB((D) over bar (*0)(2)-> D(*-)pi(+))=[0.035 +/- 0.007(stat)+/- 0.008(syst)]% and [B(B ->(D) over bar (*0)(2)mu(+)nu(mu)X)xB((D) over bar (*0)(2)-> D(*-)pi(+))]/[B(B ->(D) over bar (0)(1)mu(+)nu(mu)X)xB((D) over bar (0)(1)-> D(*-)pi(+))]=0.39 +/- 0.09(stat)+/- 0.12(syst), where the charge conjugated states are always implied MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000232724400022 L2 - EFFECTIVE FIELD-THEORY; EXCITED CHARM MESONS; HEAVY QUARKS; DECAYS; PREDICTIONS; PHYSICS SO - Physical Review Letters 2005 ;95(17): 12902 UI - 927 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kafer D AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AD - Dubna Joint Nucl Res Inst, Dubna 141980, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, IN2P3, CNRS, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, Lab Phys Subatom & Cosmol, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, F-91405 Orsay, FranceUniv Paris 06, CNRS, LPNHE, IN2P3, Paris, FranceUniv Paris 07, CNRS, LPNHE, IN2P3, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, CNRS, IReS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, Inst Phys Nucl, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst 3 A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF H, Nijmegen, NetherlandsMoscow Theoret & Expt Phys Inst, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaProtvino High Energy Phys Inst, Protvino 142284, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Dubna Joint Nucl Res Inst, Dubna 141980, Russia TI - Search for neutral supersymmetric Higgs bosons in multijet events at root s=1.96 TeV AB - We have performed a search for neutral Higgs bosons produced in association with bottom quarks in p (p) over bar collisions, using 260 pb(-1) of data collected with the D0 detector in Run II of the Fermilab Tevatron Collider. The cross sections for these processes are enhanced in many extensions of the standard model (SM), such as in its minimal supersymmetric extension at large tan beta. The results of our analysis agree with expectations from the SM, and we use our measurements to set upper limits on the production of neutral Higgs bosons in the mass range of 90 to 150 GeV MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 17 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000232443400015 L2 - STANDARD MODEL; PHYSICS; PHENOMENOLOGY SO - Physical Review Letters 2005 ;95(15): 12903 UI - 928 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kafer D AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AD - Dubna Joint Nucl Res Inst, Dubna 141980, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, IN2P3, CNRS, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, Lab Phys Subatom & Cosmol, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Gif Sur Yvette, FranceUniv Strasbourg 1, CNRS, IReS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, Inst Phys Nucl, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Gesamthsch Wuppertal, Fachbereich Phys, D-5600 Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF H, Nijmegen, NetherlandsMoscow Theoret & Expt Phys Inst, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaProtvino High Energy Phys Inst, Protvino 142284, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Dubna Joint Nucl Res Inst, Dubna 141980, Russia TI - Search for supersymmetry via associated production of charginos and neutralinos in final states with three leptons AB - A search for associated production of charginos and neutralinos is performed using data recorded with the D0 detector at a p (p) over bar center-of-mass energy of 1.96 TeV at the Fermilab Tevatron Collider. This analysis considers final states with missing transverse energy and three charged leptons, of which at least two are electrons or muons. No evidence for supersymmetry is found in a data set corresponding to an integrated luminosity of 320 pb(-1). Limits on the product of the production cross section and leptonic branching fraction are set. For the minimal supergravity model, a chargino lower mass limit of 117 GeV at the 95% C.L. is derived in regions of parameter space with enhanced leptonic branching fractions MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000232443400019 L2 - PHYSICS SO - Physical Review Letters 2005 ;95(15): 12904 UI - 998 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Cammin J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CDO AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferapontov AV AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kafer D AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaUniv Alberta, Edmonton, AB, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing, Peoples R ChinaUniv Sci & Technol China, Hefei, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci, Ctr Particle Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Lab Phys Corpusculaire, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, CNRS,Lab Phys Subatom & Cosmol, Grenoble, FranceUiv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceCNRS, IN2P2, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCEA Saclay, DAPNIA Serv Phys Particules, Saclay, FranceUniv Haute Alsace, Mulhouse, FranceUniv Louis Pasteur Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A, Aachen, GermanyUniv Bonn, Phys Inst, Bonn, GermanyUniv Freiberg, Phys Inst, Freiberg, GermanyUniv Mainz, Inst Phys, Mainz, GermanyUniv Munich, Munich, GermanyUniv Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delft, NetherlandsTata Inst Fundamental Res, Bombay, Maharashtra, IndiaUniv Coll Dublin, Dublin, IrelandKorea Univ, Korea Detector Lab, Seoul, South KoreaCINVESTAV, Mexico City, DF, MexicoUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsNIKHEF, FOM Inst, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaRoyal Inst Technol, Stockholm, SwedenLund Univ, Lund, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Riverside, Fresno, CA 93740, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, Mississippi State, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Production of WZ events in pp(-) collisions at root s=1.96 TeV and limits on anomalous WWZ couplings AB - We present results from a search for WZ production with subsequent decay to l nu l'(l) over bar'(l and l' = e or mu) using 0.30 fb(-1) of data collected by the D0 experiment between 2002 and 2004 at the Fermilab Tevatron. Three events with WZ decay characteristics are observed. With an estimated background of 0.71 +/- 0.08 events, we measure the WZ production cross section to be 4.5(-2.6)(+3.8) pb, with a 95% C.L. upper limit of 13.3 pb. The 95% C.L. limits for anomalous WWZ couplings are found to be -2.0 S-GAMMA; HELICITY; PHYSICS SO - Physical Review D 2005 ;72(1): 12909 UI - 1907 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cristetiu M AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kaur R AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, CNRS, IN2P3, Clermont Ferrand, FranceUniv Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Strasbourg 1, IReS, CNRS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, CNRS, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst 3A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of inclusive differential cross sections for Upsilon(1S) production in p(p)over-bar collisions at root s=1.96 TeV AB - We present measurements of the inclusive production cross sections of the Upsilon(1S) bottomonium state in p (p) over bar collisions at root s=1.96 TeV. Using the Upsilon(1S)->mu(+)mu(-) decay mode for a data sample of 159 +/- 10 pb(-1) collected by the D0 detector at the Fermilab Tevatron collider, we determine the differential cross sections as a function of the Upsilon(1S) transverse momentum for three ranges of the Upsilon(1S) rapidity: 0 <\y(Upsilon)\<= 0.6, 0.6 <\y(Upsilon)\<= 1.2, and 1.2 <\y(Upsilon)\<= 1.8 MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 11 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000229858100016 L2 - OCTET QUARKONIA PRODUCTION; ROOT S=1.8 TEV; HADRONIC COLLISIONS; J/PSI; HADROPRODUCTION; CHARMONIUM; MESONS; DECAYS; SOFT SO - Physical Review Letters 2005 ;94(23): 12910 UI - 2030 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams DL AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahmed SN AU - Ahn SH AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Babukhadia L AU - Bacon TC AU - Badaud F AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Beaudette F AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Binder M AU - Bischoff A AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Bonamy P AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Boswell C AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Canelli F AU - Carvalho W AU - Casey BCK AU - Casey D AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Chopra S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clark AR AU - Clement B AU - Clement C AU - Coadou Y AU - Colling DJ AU - Coney L AU - Connolly B AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CDO AU - Dean S AU - Del Signore K AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Fein D AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Galea CF AU - Gallas E AU - Galyaev E AU - Gao M AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Geurkov G AU - Ginther G AU - Goldmann K AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Graham G AU - Grannis PD AU - Greder S AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Grinstein S AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gu W AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Hanlet P AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays C AU - Hays J AU - Hebbeker T AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB T6G 2M7, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, F-67070 Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPunjabi Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaStockholm Univ, S-10691 Stockholm, SwedenLund Univ, S-22100 Lund, SwedenRoyal Inst Technol, Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of dijet azimuthal decorrelations at central rapidities in p(p)over-bar collisions at root s=1.96 TeV AB - Correlations in the azimuthal angle between the two largest transverse momentum jets have been measured using the D0 detector in p (p) over bar collisions at a center-of-mass energy root s=1.96 TeV. The analysis is based on an inclusive dijet event sample in the central rapidity region corresponding to an integrated luminosity of 150 pb(-1). Azimuthal correlations are stronger at larger transverse momenta. These are well described in perturbative QCD at next-to-leading order in the strong coupling constant, except at large azimuthal differences where contributions with low transverse momentum are significant MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000229700800014 SO - Physical Review Letters 2005 ;94(22): 12911 UI - 2091 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Jesus ACSA AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Buszello CP AU - Butler JM AU - Bystricky J AU - Caron S AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - Cruz-Burelo EDL AU - Martins CDO AU - Dean S AU - Degenhardt JD AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleck I AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Gillberg D AU - Ginther G AU - Golling T AU - Gollub N AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harel A AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Hynek V AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Juste A AU - Kafer D AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AD - Joint Inst Nucl Res, Dubna, RussiaKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsFOM, NIKHEF, Amsterdam, NetherlandsRadboud Univ Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaUniv Alberta, Edmonton, AB, CanadaUniv York, Toronto, ON, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Sci & Technol China, Hefei 230026, Peoples R ChinaUniv Andes Bogota, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P, CPPM, Marseille, FranceLab Accelerateur Lineaire, CNRS, INP3, F-91405 Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, Paris, FranceCEA, DAPINA, Serv Phys Particules, Saclay, FranceUniv Haute Alsace, Mulhouse, FranceUniv Strasbourg 1, CNRS, IReS, IN2P3, Strasbourg, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freising Weihenstephan, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the pp(-)-> W gamma plus X cross section at root s=1.96 TeV and WW gamma anomalous coupling limits AB - The WW gamma triple gauge boson coupling parameters are studied using p (p) over bar -> l nu gamma + X(l = e, mu) events at root s = 1.96 TeV. The data were collected with the D0 detector from an integrated luminosity of 162 pb(-1) delivered by the Fermilab Tevatron Collider. The cross section times branching fraction for p (p) over bar -> W(gamma) + X -> l nu gamma + X with E-T(gamma) > 8 GeV and Delta R-l gamma > 0.7 is 14.8 +/- 1.6(stat) +/- 1.0(syst) +/- 1.0(lum) pb. The one-dimensional 95% confidence level limits on anomalous couplings are -0.88 < Delta kappa(gamma) < 0.96 and -0.20 < lambda(gamma) < 0.20 MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 1550-7998 UR - ISI:000229440300008 L2 - P(P)OVER-BAR COLLISIONS; COLLIDER SO - Physical Review D 2005 ;71(9): 12912 UI - 2200 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kado MM AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kehoe R AU - Kermiche S AD - Joint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilMcGill Univ, Montreal, PQ, CanadaUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCzech Tech Univ, CR-16635 Prague, Czech RepublicCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceCEA, DAPNIA, Serv Phys Particles, Saclay, FranceUniv Haute Alsace, Mulhouse, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPunjabi Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM Inst NIKHEF, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaStockholm Univ, S-10691 Stockholm, SwedenRoyal Inst Technol, Stockholm, SwedenLund Univ, Lund, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAUniv Kansas, Manhattan, KS 66506, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the ratio of B+ and B-0 meson lifetimes AB - The ratio of the B+ and B-0 meson lifetimes was measured using data collected in 2002-2004 by the D0 experiment in Run II of the Fermilab Tevatron Collider. These mesons were reconstructed in B&RARR;μ(+)ν D*-X decays, which are dominated by B-0 and B&RARR;μ(+)ν(D) over bar X-0 decays, which are dominated by B+. The ratio of lifetimes is measured to be τ(+)/τ(0)=1.080&PLUSMN; 0.016(stat)&PLUSMN; 0.014(syst) MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000229074300016 L2 - PHYSICS; DECAYS SO - Physical Review Letters 2005 ;94(18): 12913 UI - 2357 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kado MM AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kehoe R AU - Kermiche S AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaUniv Alberta, Edmonton, AB, CanadaMcGill Univ, Montreal, PQ, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA Saclay, Serv Phys Particules, DAPNIA, Paris, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3 A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci & Technol, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the ratio of inclusive cross sections sigma(p(p)over-bar -> Z plus b jet)/sigma(p(p)over-bar -> Z plus jet) at root s=1.96 TeV AB - Using the data collected with the D0 detector at root s=1.96 TeV, for integrated luminosities of about 180 pb(-1), we have measured the ratio of inclusive cross sections for p(p) over bar -> Z+b jet to p(p) over bar -> Z+jet production. The inclusive Z+b-jet reaction is an important background to searches for the Higgs boson in associated ZH production at the Fermilab Tevatron collider. Our measurement is the first of its kind, and relies on the Z -> e(+)e(-) and Z ->mu(+)mu(-) modes. The combined measurement of the ratio yields 0.021 +/- 0.005 for hadronic jets with transverse momenta p(T)> 20 GeV/c and pseudorapidities vertical bar eta vertical bar < 2.5, consistent with next-to-leading-order predictions of the standard model MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000228763800015 SO - Physical Review Letters 2005 ;94(16): 12914 UI - 2364 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cristetiu M AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kaur R AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, IN2P3, CNRS, Clermont Ferrand, FranceUniv Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceCNRS, Lab Accelerateur Lineaire, IN2P3, Orsay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceCEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Louis Pasteur Strasbourg 1, IReS, IN2P3, CNRS, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, IN2P3, CNRS, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A, Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for first-generation scalar leptoquarks in p(p)over-bar collisions at root s=1.96 TeV AB - We report on a search for pair production of first-generation scalar leptoquarks (LQ) in p (p) over bar collisions at root s=1.96 TeV using an integrated luminosity of 252 pb(-1) collected at the Fermilab Tevatron collider by the D0 detector. We observe no evidence for LQ production in the topologies arising from LQ(LQ) over bar -> eqeq and LQ(LQ) over bar -> eq nu q, and derive 95% C.L. lower limits on the LQ mass as a function of beta, where beta is the branching fraction for LQ -> eq. The limits are 241 and 218 GeV/c(2) for beta=1 and 0.5, respectively. These results are combined with those obtained by D0 at root s=1.8 TeV, which increases these LQ mass limits to 256 and 234 GeV/c(2) MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000228765400004 L2 - FERMION-PAIR PRODUCTION; HERA; GENERATION; TEVATRON; PHYSICS; BOSONS; LEP SO - Physical Review D 2005 ;71(7): 12915 UI - 2365 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cristetiu M AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kaur R AU - Kehoe R AD - Joint Nucl Res Inst, Dubna, RussiaUniv Oklahoma, Norman, OK 73019, USAMichigan State Univ, E Lansing, MI 48824, USATata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Illinois, Chicago, IL 60607, USAFlorida State Univ, Tallahassee, FL 32306, USACEA Saclay, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Louis Pasteur Strasbourg 1, IReS, IN2P3, CNRS, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaKansas State Univ, Manhattan, KS 66506, USAPetersburg Nucl Phys Inst, St Petersburg, RussiaUniv Michigan, Ann Arbor, MI 48109, USANortheastern Univ, Boston, MA 02115, USACtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsNorthwestern Univ, Evanston, IL 60208, USAUniv Arizona, Tucson, AZ 85721, USAUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceUniv Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, FranceRice Univ, Houston, TX 77005, USALund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenIowa State Univ, Ames, IA 50011, USARhein Westfal TH Aachen, Phys Inst A, D-5100 Aachen, GermanyUniv Los Andes, Bogota, ColombiaUniv Clermont Ferrand, Phys Corpusculaire Lab, IN2P3, CNRS, Clermont Ferrand, FranceUniv Maryland, College Pk, MD 20742, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Kansas, Lawrence, KS 66045, USAUniv London Imperial Coll Sci Technol & Med, London, EnglandIndiana Univ, Bloomington, IN 47405, USAUniv Rochester, Rochester, NY 14627, USAUniv Nebraska, Lincoln, NE 68588, USAPunjabi Univ, Chandigarh 160014, IndiaUniv Lancaster, Lancaster, EnglandInst High Energy Phys, Protvino, RussiaUniv Munich, Munich, GermanyBoston Univ, Boston, MA 02215, USANo Illinois Univ, De Kalb, IL 60115, USAUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Notre Dame, Notre Dame, IN 46556, USAColumbia Univ, New York, NY 10027, USAUniv Texas, Arlington, TX 76019, USAUniv Washington, Seattle, WA 98195, USAUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilBrown Univ, Providence, RI 02912, USACINVESTAV, Mexico City 14000, DF, MexicoUniv Calif Riverside, Riverside, CA 92521, USAUniv Delhi, Delhi 110007, IndiaUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceUniv Manchester, Manchester, Lancs, EnglandSUNY Stony Brook, Stony Brook, NY 11794, USAMoscow MV Lomonosov State Univ, Moscow, RussiaCNRS, Lab Accelerateur Lineaire, IN2P3, Orsay, FranceInst Theoret & Expt Phys, Moscow 117259, RussiaPrinceton Univ, Princeton, NJ 08544, USAUniv Bonn, Inst Phys, D-5300 Bonn, GermanyLouisiana Tech Univ, Ruston, LA 71272, USAUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Coll Dublin, Dublin 2, IrelandCalif State Univ Fresno, Fresno, CA 93740, USAUniv Virginia, Charlottesville, VA 22901, USAUniv San Francisco Quito, Quito, EcuadorUniv Mainz, Inst Phys, D-6500 Mainz, GermanyBrookhaven Natl Lab, Upton, NY 11973, USASo Methodist Univ, Dallas, TX 75275, USAAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv Lyon 1, Inst Phys Nucl Lyon, IN2P3, CNRS, F-69622 Villeurbanne, FranceLawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USAUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyAcad Sinica, Inst High Energy Phys, Beijing, Peoples R ChinaUniv Mississippi, University, MS 38677, USAUniv Buenos Aires, Buenos Aires, DF, ArgentinaCzech Tech Univ, CR-16635 Prague, Czech RepublicLangston Univ, Langston, OK 73050, USACharles Univ, Ctr Particle Phys, Prague, Czech RepublicAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Measurement of sigma(p(p)over-bar -> Z)center dot Br(Z ->tau tau) at root s=1.96 TeV AB - We present a measurement of the cross section for Z production times the branching fraction to tau leptons, sigma.Br(Z ->tau(+)tau(-)), in p (p) over bar collisions at root s=1.96 TeV in the channel in which one tau decays into mu nu(mu)nu(tau), and the other into hadrons+nu(tau) or e nu(e)nu(tau). The data sample corresponds to an integrated luminosity of 226 pb(-1) collected with the D0 detector at the Fermilab Tevatron collider. The final sample contains 2008 candidate events with an estimated background of 55%. From this we obtain sigma.Br(Z ->tau(+)tau(-)) = 237 +/- 15(stat)+/- 18(sys)+/- 15(lum)pb, in agreement with the standard model prediction MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000228765400010 L2 - FORWARD-BACKWARD ASYMMETRIES; Z-RESONANCE PARAMETERS; CROSS-SECTIONS; P(P)OVER-BAR COLLISIONS; LEP; COLLIDER; BOSON SO - Physical Review D 2005 ;71(7): 12916 UI - 2511 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveria Martins C AU - Dean S AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kado MM AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kehoe R AU - Kermiche S AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaUniv Alberta, Edmonton, AB, CanadaMcGill Univ, Montreal, PQ, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, CNRS, IN2P3, Clermont Ferrand, FranceUniv Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Strasbourg 1, IReS, CNRS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, CNRS, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the WW production cross section in p(p)over-bar collisions at root(s)over-bar=1.96 TeV AB - We present a measurement of the W boson pair-production cross section in p(p) over bar collisions at a center-of-mass energy of root s=1.96 TeV. The data, collected with the Run II D0 detector at Fermilab, correspond to an integrated luminosity of 224-252 pb(-1) depending on the final state (ee, e mu, or mu mu). We observe 25 candidates with a background expectation of 8.1 +/- 0.6(stat)+/- 0.6(syst)+/- 0.5(lum) events. The probability for an upward fluctuation of the background to produce the observed signal is 2.3x10(-7), equivalent to 5.2 standard deviations. The measurement yields a cross section of 13.8(-3.8)(+4.3)(stat)(-0.9)(+1.2)(syst)+/- 0.9(lum) pb, in agreement with predictions from the standard model MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000228632500010 L2 - PHYSICS; W+ SO - Physical Review Letters 2005 ;94(15): 12917 UI - 2512 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Andeen T AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Biscarat C AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Choudhary B AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Cothenet A AU - Cousinou MC AU - Cox B AU - Crepe-Renaudin S AU - Cristetiu M AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveira Martins C AU - Dean S AU - Deliot F AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kaur R AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaMcGill Univ, Montreal, PQ, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, Phys Corpusculaire Lab, CNRS, IN2P3, Clermont Ferrand, FranceUniv Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble, FranceUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceLab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Strasbourg 1, IReS, CNRS, IN2P3, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, CNRS, IN2P3, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoFOM, Inst NIKHEF, NL-1098 SJ Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for anomalous heavy-flavor quark production in association with W bosons AB - We search for anomalous production of heavy-flavor quark jets in association with W bosons at the Fermilab Tevatron p(p) over bar Collider in final states in which the heavy-flavor quark content is enhanced by requiring at least one tagged jet in an event. Jets are tagged using one algorithm based on semileptonic decays of b/c hadrons, and another on their lifetimes. We compare e+jets (164 pb(-1)) and mu+jets (145 pb(-1)) channels collected with the D0 detector at root s = 1.96 TeV to expectations from the standard model and set upper limits on anomalous production of such events MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000228632500013 SO - Physical Review Letters 2005 ;94(15): 12918 UI - 2704 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - Cruz-Burelo ED AU - Martins CD AU - Dean S AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kado MM AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kehoe R AU - Kermiche S AD - Univ Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio De Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaUniv Alberta, Edmonton, AB, CanadaMcGill Univ, Montreal, PQ, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, IN2P3 CNRS, Lab Phys Corpusculaire, Clermont Ferrand, FranceUniv Grenoble 1, IN2P3 CNRS, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3 CNRS, Marseille, FranceIN2P3 CNRS, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, LPNHE, IN2P3 CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3 CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, IReS, IN2P3 CNRS, Strasbourg, FranceUniv Haute Alcase, Mulhouse, FranceUniv Lyon 1, Inst Phys Nucl Lyon, IN2P3 CNRS, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3 A, Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenUniv Stockholm, Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Univ Buenos Aires, Buenos Aires, DF, Argentina TI - Measurement of the Lambda(0)(b) lifetime in the decay Lambda(0)(b)-> J/psi Lambda(0) with the D0 detector AB - We present measurements of the Lambda(b)(0) lifetime in the exclusive decay channel Lambda(b)(0)-> J/psi Lambda(0), with J/psi ->mu(+)mu(-) and Lambda(0)-> p pi(-), the B-0 lifetime in the decay B-0-> J/psi K-S(0) with J/psi ->mu(+)mu(-) and K-S(0)->pi(+)pi(-), and the ratio of these lifetimes. The analysis is based on approximately 250 pb(-1) of data recorded with the D0 detector in p (p) over bar collisions at root s = 1.96 TeV. The Lambda(b)(0) lifetime is determined to be tau(Lambda(b)(0))=1.22(-0.18)(+0.22)(stat)+/- 0.04(syst) ps, the B-0 lifetime tau(B-0)=1.40(-) (+0.11)(0.10)(stat)+/- 0.03(syst) ps, and the ratio tau(Lambda(b)(0))/tau(B-0)=0.87(-) (+0.17)(0.14)(stat)+/- 0.03(syst). In contrast with previous measurements using semileptonic decays, this is the first determination of the Lambda(b)(0) lifetime based on a fully reconstructed decay channel MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000227838900015 L2 - BEAUTY HADRONS SO - Physical Review Letters 2005 ;94(10): 12919 UI - 2775 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - De Oliveira Martins C AU - Dean S AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kado MM AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kehoe R AU - Kermiche S AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilMcGill Univ, Montreal, PQ, CanadaUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, Prague, Czech RepublicAcad Sci Czech Republ, Ctr Partcile Phys, Inst Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUnvi Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceIN2P3, CNRS, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, IN2P3, CNRS, LPNHE, Paris, FranceUniv Paris 07, Paris, FranceCEA, Serv Phys Particules, DAPNIA, Saclay, FranceUniv Haute Alsace, Mulhouse, FranceUniv Strasbourg 1, IN2P3, CNRS, IReS, Strasbourg, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Phys Inst A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoUniv Amsterdam, FOM Inst, NIKHEF H, NL-1009 DB Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaRoyal Inst Technol, Stockholm, SwedenLund Univ, Lund, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Oklahoma City, OK, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Search for Wbb(-) and WH production in pp(-) collisions at root s=1.96 TeV AB - We present a search for Wb (b) over bar production in p (p) over bar collisions at root s=1.96 TeV in events containing one electron, an imbalance in transverse momentum, and two b-tagged jets. Using 174 pb(-1) of integrated luminosity accumulated by the D0 experiment at the Fermilab Tevatron collider, and the standard-model description of such events, we set a 95% C.L. upper limit on Wb (b) over bar production of 6.6 pb for b quarks with transverse momenta p(T)(b)> 20 GeV and b (b) over bar separation in pseudorapidity-azimuth space Delta R-bb> 0.75. Restricting the search to optimized b (b) over bar mass intervals provides upper limits on WH production of 9.0-12.2 pb for Higgs-boson masses of 105-135 GeV MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000227566000011 L2 - PHYSICS SO - Physical Review Letters 2005 ;94(9): 12920 UI - 3015 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahn SH AU - Ahsan M AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Badaud F AU - Baden A AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Binder M AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Brandt A AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Carvalho W AU - Casey BCK AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clement B AU - Clement C AU - Coadou Y AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Gadfort T AU - Galea CF AU - Gallas E AU - Galyaev E AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greder S AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays J AU - Hebbeker T AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Houben P AU - Hu Y AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jabeen S AU - Jaffre M AU - Jain S AU - Jain V AU - Jakobs K AU - Jenkins A AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jonsson P AU - Jostlein H AU - Juste A AU - Kado MM AU - Kafer D AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Kalk J AU - Karmanov D AU - Kasper J AU - Kau D AU - Kehoe R AU - Kermiche S AD - Joint Nucl Res Inst, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaLAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio de Janerio, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilMcGill Univ, Montreal, PQ, CanadaUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaYork Univ, Toronto, ON M3J 2R7, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Haute Alsace, Mulhouse, FranceUniv Strasbourg 1, CNRS, IReS, IN2P3, Strasbourg, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys A 3, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPunjabi Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Berkeley, CA 94720, USALawrence Berkeley Natl Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv Mississippi, University, MS 38677, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USASo Methodist Univ, Dallas, TX 75275, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Nucl Res Inst, Dubna, Russia TI - Search for the flavour-changing neutral current B-s(0)->mu+mu- in p(p)over-bar collisions at root s=1.96 TeV with the D0 dectector AB - We present the results of a search for the flavor-changing neutral current decay B-s(0)-->mu(+)mu(-) using a data set with integrated luminosity of 240 pb(-1) of p (p) over bar collisions at roots=1.96 TeV collected with the D0 detector in run II of the Fermilab Tevatron collider. We find the upper limit on the branching fraction to be B(B-s(0)-->mu(+)mu(-))less than or equal to5.0x10(-7) at the 95% C.L. assuming no contributions from the decay B-d(0)-->mu(+)mu(-) in the signal region. This limit is the most stringent upper bound on the branching fraction B-s(0)-->mu(+)mu(-) to date MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 37 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000227245700014 L2 - B-S; QCD CORRECTIONS; MU(+) MU(-); RUN-II; DECAYS; MODELS SO - Physical Review Letters 2005 ;94(7): 12921 UI - 3096 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams DL AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahmed SN AU - Ahn SH AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Beaudette F AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Binder M AU - Bischoff A AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Bonamy P AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Boswell C AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Canelli F AU - Carvalho W AU - Casey BCK AU - Casey D AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Chopra S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clark AR AU - Clement B AU - Clement C AU - Coadou Y AU - Colling DJ AU - Coney L AU - Connolly B AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CD AU - Dean S AU - Del Signore K AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Fein D AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Galea CF AU - Gallas E AU - Galyaev E AU - Gao M AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Geurkov G AU - Ginther G AU - Goldmann K AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Graham G AU - Grannis PD AU - Greder S AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Grinstein S AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gu W AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Hanlet P AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays C AU - Hays J AU - Hebbeker T AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AU - Hou S AU - Hu Y AU - Huang J AU - Huang Y AU - Iashvili I AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUniv Haute Alsace, Alsace, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3 A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaStockholm Univ, Royal Inst Technol, S-10691 Stockholm, SwedenLund Univ, Lund, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Search for supersymmetry with gauge-mediated breaking in diphoton events at D0 AB - We report the results of a search for supersymmetry (SUSY) with gauge-mediated breaking in the missing transverse energy distribution of inclusive diphoton events using 263 pb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider in 2002-2004. No excess is observed above the background expected from standard model processes, and lower limits on the masses of the lightest neutralino and chargino of about 108 and 195 GeV, respectively, are set at the 95% confidence level. These are the most stringent limits to date for models with gauge-mediated SUSY breaking with a short-lived neutralino as the next-to-lightest SUSY particle MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 4 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000226779000015 L2 - LIGHT GRAVITINO; MODELS SO - Physical Review Letters 2005 ;94(4): 12922 UI - 3097 AU - Abazov VM AU - Abbott B AU - Abolins M AU - Acharya BS AU - Adams DL AU - Adams M AU - Adams T AU - Agelou M AU - Agram JL AU - Ahmed SN AU - Ahn SH AU - Alexeev GD AU - Alkhazov G AU - Alton A AU - Alverson G AU - Alves GA AU - Anastasoaie M AU - Anderson S AU - Andrieu B AU - Arnoud Y AU - Askew A AU - Asman B AU - Atramentov O AU - Autermann C AU - Avila C AU - Babukhadia L AU - Bacon TC AU - Badaud F AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Bargassa P AU - Baringer P AU - Barnes C AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beauceron S AU - Beaudette F AU - Begel M AU - Bellavance A AU - Beri SB AU - Bernardi G AU - Bernhard R AU - Bertram I AU - Besancon M AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Bhattacharjee M AU - Binder M AU - Bischoff A AU - Black KM AU - Blackler I AU - Blazey G AU - Blekman F AU - Blessing S AU - Bloch D AU - Blumenschein U AU - Boehnlein A AU - Boeriu O AU - Bolton TA AU - Bonamy P AU - Borcherding F AU - Borissov G AU - Bos K AU - Bose T AU - Boswell C AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchanan NJ AU - Buchholz D AU - Buehler M AU - Buescher V AU - Burdin S AU - Burnett TH AU - Busato E AU - Butler JM AU - Bystricky J AU - Canelli F AU - Carvalho W AU - Casey BCK AU - Casey D AU - Cason NM AU - Castilla-Valdez H AU - Chakrabarti S AU - Chakraborty D AU - Chan KM AU - Chandra A AU - Chapin D AU - Charles F AU - Cheu E AU - Chevalier L AU - Cho DK AU - Choi S AU - Chopra S AU - Christiansen T AU - Christofek L AU - Claes D AU - Clark AR AU - Clement B AU - Clement C AU - Coadou Y AU - Colling DJ AU - Coney L AU - Connolly B AU - Cooke M AU - Cooper WE AU - Coppage D AU - Corcoran M AU - Coss J AU - Cothenet A AU - Cousinou MC AU - Crepe-Renaudin S AU - Cristetiu M AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davies B AU - Davies G AU - Davis GA AU - De K AU - de Jong P AU - de Jong SJ AU - De La Cruz-Burelo E AU - Martins CDO AU - Dean S AU - Del Signore K AU - Deliot F AU - Delsart PA AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doidge M AU - Dong H AU - Doulas S AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyer J AU - Dyshkant A AU - Eads M AU - Edmunds D AU - Edwards T AU - Ellison J AU - Elmsheuser J AU - Eltzroth JT AU - Elvira VD AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans D AU - Evans H AU - Evdokimov A AU - Evdokimov VN AU - Fast J AU - Fatakia SN AU - Fein D AU - Feligioni L AU - Ferbel T AU - Fiedler F AU - Filthaut F AU - Fisher W AU - Fisk HE AU - Fleuret F AU - Fortner M AU - Fox H AU - Freeman W AU - Fu S AU - Fuess S AU - Galea CF AU - Gallas E AU - Galyaev E AU - Gao M AU - Garcia C AU - Garcia-Bellido A AU - Gardner J AU - Gavrilov V AU - Gay P AU - Gele D AU - Gelhaus R AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Geurkov G AU - Ginther G AU - Goldmann K AU - Golling T AU - Gomez B AU - Gounder K AU - Goussiou A AU - Graham G AU - Grannis PD AU - Greder S AU - Green JA AU - Greenlee H AU - Greenwood ZD AU - Gregores EM AU - Grinstein S AU - Gris P AU - Grivaz JF AU - Groer L AU - Grunendahl S AU - Grunewald MW AU - Gu W AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Haas A AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hall I AU - Hall RE AU - Han C AU - Han L AU - Hanagaki K AU - Hanlet P AU - Harder K AU - Harrington R AU - Hauptman JM AU - Hauser R AU - Hays C AU - Hays J AU - Hebbeker T AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hensel C AU - Hesketh G AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Hohlfeld M AU - Hong SJ AU - Hooper R AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, BrazilUniv Alberta, Edmonton, AB, CanadaSimon Fraser Univ, Burnaby, BC V5A 1S6, CanadaInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicCzech Tech Univ, CR-16635 Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco Quito, Quito, EcuadorUniv Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, FranceUniv Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, FranceUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, FranceUniv Haute Alsace, Mulhouse, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceRhein Westfal TH Aachen, Inst Phys 3 A, D-5100 Aachen, GermanyUniv Bonn, Inst Phys, D-5300 Bonn, GermanyUniv Freiburg, Inst Phys, Freiburg, GermanyUniv Mainz, Inst Phys, D-6500 Mainz, GermanyUniv Munich, Munich, GermanyUniv Wuppertal, Fachbereich Phys, Wuppertal, GermanyPanjab Univ, Chandigarh 160014, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaUniv Coll Dublin, Dublin 2, IrelandKorea Univ, Korea Detector Lab, Seoul 136701, South KoreaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, NL-1009 DB Amsterdam, NetherlandsUniv Amsterdam, NIKHEF H, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaLund Univ, Lund, SwedenRoyal Inst Technol, Stockholm, SwedenStockholm Univ, S-10691 Stockholm, SwedenUppsala Univ, Uppsala, SwedenUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Manchester, Manchester, Lancs, EnglandUniv Arizona, Tucson, AZ 85721, USALawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Calif Berkeley, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Mississippi, University, MS 38677, USAUniv Nebraska, Lincoln, NE 68588, USAPrinceton Univ, Princeton, NJ 08544, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the B-s(0) lifetime in the exclusive decay channel B-s(0)-> J/psi phi AB - Using the exclusive decay B-s(0)-->J/psi(mu(+)mu(-))phi(K+K-), we report the most precise single measurement of the B-s(0) lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb(-1) collected with the D0 detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signal candidates, from which we extract the B-s(0) lifetime, tau(B-s(0))=1.444(-0.090)(+0.098)(stat)+/-0.020(sys) ps. We also report a measurement for the lifetime of the B-0 meson using the exclusive decay B-0-->J/psi(mu(+)mu(-))K-*0(892)(K(+)pi(-)). We reconstruct 1370 signal candidates, obtaining tau(B-0)=1.473(-0.050)(+0.052)(stat)+/-0.023(sys) ps, and the ratio of lifetimes, tau(B-s(0))/tau(B-0)=0.980(-0.071)(+0.076)(stat)+/-0.003(sys) MH - Argentina MH - Brazil MH - Canada MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Ireland MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - South Korea MH - Sweden MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000226779000018 SO - Physical Review Letters 2005 ;94(4): 12923 UI - 3343 AU - Abazov VM AU - Abbott B AU - Abdesselam A AU - Abolins M AU - Abramov V AU - Acharya BS AU - Adams DL AU - Adams M AU - Alexeev GD AU - Alton A AU - Alves GA AU - Arnoud Y AU - Avila C AU - Babukhadia L AU - Bacon TC AU - Baden A AU - Baffioni S AU - Baldin B AU - Balm PW AU - Banerjee S AU - Barberis E AU - Baringer P AU - Barreto J AU - Bartlett JF AU - Bassler U AU - Bauer D AU - Bean A AU - Beaudette F AU - Begel M AU - Belyaev A AU - Beri SB AU - Bernardi G AU - Bertram I AU - Besson A AU - Beuselinck R AU - Bezzubov VA AU - Bhat PC AU - Bhatnagar V AU - Blazey G AU - Blekman F AU - Blessing S AU - Boehnlein A AU - Bolton TA AU - Borcherding F AU - Bos K AU - Bose T AU - Brandt A AU - Briskin G AU - Brock R AU - Brooijmans G AU - Bross A AU - Buchholz D AU - Buehler M AU - Buescher V AU - Butler JM AU - Canelli F AU - Carvalho W AU - Castilla-Valdez H AU - Chakraborty D AU - Chan KM AU - Cho DK AU - Choi S AU - Claes D AU - Clark AR AU - Connolly B AU - Cooper WE AU - Coppage D AU - Crepe-Renaudin S AU - Cummings MAC AU - Cutts D AU - da Motta H AU - Davis GA AU - De K AU - de Jong SJ AU - Demarteau M AU - Demina R AU - Demine P AU - Denisov D AU - Denisov SP AU - Desai S AU - Diehl HT AU - Diesburg M AU - Doulas S AU - Dudko LV AU - Duflot L AU - Dugad SR AU - Duperrin A AU - Dyshkant A AU - Edmunds D AU - Ellison J AU - Eltzroth JT AU - Elvira VD AU - Engelmann R AU - Eno S AU - Ermolov P AU - Eroshin OV AU - Estrada J AU - Evans H AU - Evdokimov VN AU - Ferbel T AU - Filthaut F AU - Fisk HE AU - Fortner M AU - Fox H AU - Fu S AU - Fuess S AU - Gallas E AU - Gao M AU - Gavrilov V AU - Genser K AU - Gerber CE AU - Gershtein Y AU - Ginther G AU - Gomez B AU - Goncharov PI AU - Gounder K AU - Goussiou A AU - Grannis PD AU - Greenlee H AU - Greenwood ZD AU - Grinstein S AU - Groer L AU - Grunendahl S AU - Gurzhiev SN AU - Gutierrez G AU - Gutierrez P AU - Hadley NJ AU - Haggerty H AU - Hagopian S AU - Hagopian V AU - Hall RE AU - Han C AU - Hansen S AU - Hauptman JM AU - Hebert C AU - Hedin D AU - Heinmiller JM AU - Heinson AP AU - Heintz U AU - Hildreth MD AU - Hirosky R AU - Hobbs JD AU - Hoeneisen B AU - Huang J AU - Iashvili I AU - Illingworth R AU - Ito AS AU - Jaffre M AU - Jain S AU - Jain V AU - Jesik R AU - Johns K AU - Johnson M AU - Jonckheere A AU - Jostlein H AU - Juste A AU - Kahl W AU - Kahn S AU - Kajfasz E AU - Kalinin AM AU - Karmanov D AU - Karmgard D AU - Kehoe R AU - Kesisoglou S AU - Khanov A AU - Kharchilava A AU - Klima B AU - Kohli JM AU - Kostritskiy AV AU - Kotcher J AU - Kothari B AU - Kozelov AV AU - Kozlovsky EA AU - Krane J AU - Krishnaswamy MR AU - Krivkova P AU - Krzywdzinski S AU - Kubantsev M AU - Kuleshov S AU - Kulik Y AU - Kunori S AU - Kupco A AU - Landsberg G AU - Lee WM AU - Leflat A AU - Lehner F AU - Leonidopoulos C AU - Li J AU - Li QZ AU - Lima JGR AU - Lincoln D AU - Linn SL AU - Linnemann J AU - Lipton R AU - Lueking L AU - Lundstedt C AU - Luo C AU - Maciel AKA AU - Madaras RJ AU - Malyshev VL AU - Manankov V AU - Mao HS AU - Marshall T AU - Martin MI AU - Mattingly SEK AU - Mayorov AA AU - McCarthy R AU - McMahon T AU - Melanson HL AU - Melnitchouk A AU - Merkin M AU - Merritt KW AU - Miao C AU - Miettinen H AU - Mihalcea D AU - Mokhov N AU - Mondal NK AU - Montgomery HE AU - Moore RW AU - Mutaf YD AU - Nagy E AU - Narain M AU - Narasimham VS AU - Naumann NA AU - Neal HA AU - Negret JP AU - Nelson S AU - Nomerotski A AU - Nunnemann T AU - O'Neil D AU - Oguri V AU - Oshima N AU - Padley P AU - Parashar N AU - Partridge R AU - Parua N AU - Patwa A AU - Peters O AU - Petroff P AU - Piegaia R AU - Pope BG AU - Prosper HB AU - Protopopescu S AU - Przybycien MB AU - Qian J AU - Rajagopalan S AU - Rapidis PA AU - Reay NW AU - Reucroft S AU - Rijssenbeek M AU - Rizatdinova F AU - Royon C AU - Rubinov P AU - Ruchti R AU - Sabirov BM AD - Joint Inst Nucl Res, Dubna, RussiaUniv Buenos Aires, Buenos Aires, DF, ArgentinaCtr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, Rio De Janeiro, BrazilInst High Energy Phys, Beijing 100039, Peoples R ChinaUniv Los Andes, Bogota, ColombiaCharles Univ, Ctr Particle Phys, Prague, Czech RepublicAcad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech RepublicUniv San Francisco, Quito, EcuadorUniv Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, Grenoble, FranceUniv Mediterranee, CPPM, IN2P3, CNRS, Marseille, FranceIN2P3, CNRS, Lab Accelerateur Lineaire, Orsay, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceCEA, DAPNIA, Serv Phys Particules, Saclay, FranceUniv Freiburg, Inst Phys, Freiburg, GermanyPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaTata Inst Fundamental Res, Bombay 400005, Maharashtra, IndiaCINVESTAV, Mexico City 14000, DF, MexicoNIKHEF H, FOM Inst, Amsterdam, NetherlandsUniv Amsterdam, NIKHEF, Amsterdam, NetherlandsUniv Nijmegen, NIKHEF H, Nijmegen, NetherlandsJoint Inst Nucl Res, Dubna, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaMoscow MV Lomonosov State Univ, Moscow, RussiaInst High Energy Phys, Protvino, RussiaUniv Lancaster, Lancaster, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandUniv Arizona, Tucson, AZ 85721, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USACalif State Univ Fresno, Fresno, CA 93740, USAUniv Calif Irvine, Irvine, CA 92697, USAUniv Calif Riverside, Riverside, CA 92521, USAFlorida State Univ, Tallahassee, FL 32306, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Illinois, Chicago, IL 60607, USANo Illinois Univ, De Kalb, IL 60115, USANorthwestern Univ, Evanston, IL 60208, USAIndiana Univ, Bloomington, IN 47405, USAUniv Notre Dame, Notre Dame, IN 46556, USAIowa State Univ Sci & Technol, Ames, IA 50011, USAUniv Kansas, Lawrence, KS 66045, USAKansas State Univ, Manhattan, KS 66506, USALouisiana Tech Univ, Ruston, LA 71272, USAUniv Maryland, College Pk, MD 20742, USABoston Univ, Boston, MA 02215, USANortheastern Univ, Boston, MA 02115, USAUniv Michigan, Ann Arbor, MI 48109, USAMichigan State Univ, E Lansing, MI 48824, USAUniv Nebraska, Lincoln, NE 68588, USAColumbia Univ, New York, NY 10027, USAUniv Rochester, Rochester, NY 14627, USASUNY Stony Brook, Stony Brook, NY 11794, USABrookhaven Natl Lab, Upton, NY 11973, USALangston Univ, Langston, OK 73050, USAUniv Oklahoma, Norman, OK 73019, USABrown Univ, Providence, RI 02912, USAUniv Texas, Arlington, TX 76019, USARice Univ, Houston, TX 77005, USAUniv Virginia, Charlottesville, VA 22901, USAUniv Washington, Seattle, WA 98195, USAAbazov, VM, Joint Inst Nucl Res, Dubna, Russia TI - Measurement of the top quark mass in all-jet events AB - We describe a measurement of the mass of the top quark from the purely hadronic decay modes of t (t) over bar pairs using all-jet data produced in p (p) over bar collisions at roots = 1.8 TeV at the Fermilab Tevatron Collider. The data, which correspond to an integrated luminosity of 110.2 +/- 5.8 pb(-1), were collected with the DO detector from 1992 to 1996. We find a top quark mass of 178.5 +/- 13.7(stat) +/- 7.7(syst) GeV/c(2). (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Brazil MH - Colombia MH - Czech Republic MH - Ecuador MH - United Kingdom MH - France MH - Germany MH - India MH - Mexico|Distrito Federal MH - Netherlands MH - Peoples R China MH - Russia MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000226435800004 L2 - top quark;DECAY SO - Physics Letters B 2005 ;606(1-2):25-33 12924 UI - 1786 AU - Abe F AU - Nagafuji S AU - Okawa M AU - Kinjo J AU - Akahane H AU - Ogura T AU - Martinez-Alfaro MA AU - Reyes-Chilpa R AD - Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, Fukuoka 8140180, JapanFukuoka Univ, Sch Med, Jonan Ku, Fukuoka 8140180, JapanUniv Autonoma Guadalajara, Dept Chem, CEN, Guadalajara, Jalisco, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoAbe, F, Fukuoka Univ, Fac Pharmaceut Sci, Jonan Ku, 8-19-1 Nanakuma, Fukuoka 8140180, Japan TI - Trypanocidal constituents in plants 5. Evaluation of some Mexican plants for their trypanocidal activity and active constituents in the seeds of Persea americana AB - Crude extracts of Mexican medicinal plants were screened for trypanocidal activity against Trypanosoma cruzi, which is the etiological agent for Chagas' disease, one of the most serious protozoan diseases in Latin America. There were 71 kinds of methanolic and other organic extracts from 65 plants, which were newly examined by a preliminary screening test to observe immobilization of epimastigotes and trypomastigotes of T cruzi in vitro. The MeOH extract of seeds of Persea americana (avocado) showed moderate activity against epimastigotes. In order to identify the principal compounds for the activity, the MeOH extract was subjected to bioassay-guided fractionation. From the active fractions, six 1,2,4-trihydroxyheptadecane derivatives and two 1,2,4-trihydroxynonadecane derivatives including a new one were isolated. These compounds showed moderate activity against epimastigotes and trypomastigotes MH - Japan MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - TOKYO: PHARMACEUTICAL SOC JAPAN RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0918-6158 UR - ISI:000230464900038 L2 - trypanocidal activity;Trypanosoma cruzi;Persea americana;Chagas' disease;1,2,4-trihydroxyheptadecane derivative;ANTIFUNGAL COMPOUNDS; AVOCADO PEAR; FRUIT SO - Biological & Pharmaceutical Bulletin 2005 ;28(7):1314-1317 12925 UI - 2387 AU - Abe O AU - Abe R AU - Enomoto K AU - Kikuchi K AU - Koyama H AU - Masuda H AU - Nomura Y AU - Sakai K AU - Sugimachi K AU - Tominaga T AU - Uchino J AU - Yoshida M AU - Haybittle JL AU - Davies C AU - Harvey VJ AU - Holdaway TM AU - Kay RG AU - Mason BH AU - Forbes JF AU - Wilcken N AU - Gnant M AU - Jakesz R AU - Ploner M AU - Yosef HMA AU - Focan C AU - Lobelle JP AU - Peek U AU - Oates GD AU - Powell J AU - Durand M AU - Mauriac L AU - Di Leo A AU - Dolci S AU - Piccart MJ AU - Masood MB AU - Parker D AU - Price JJ AU - Hupperets PSGJ AU - Jackson S AU - Ragaz J AU - Berry D AU - Broadwater G AU - Cirrincione C AU - Muss H AU - Norton L AU - Weiss RB AU - bu-Zahra HT AU - Portnoj SM AU - Baum M AU - Cuzick J AU - Houghton J AU - Riley D AU - Gordon NH AU - Davis HL AU - Beatrice A AU - Mihura J AU - Naja A AU - Lehingue Y AU - Romestaing P AU - Dubois JB AU - Delozier T AU - Mace-Lesec'h J AU - Rambert P AU - Andrysek O AU - Barkmanova J AU - Owen JR AU - Meier P AU - Howell A AU - Ribeiro GC AU - Swindell R AU - Alison R AU - Boreham J AU - Clarke M AU - Collins R AU - Darby S AU - Davies C AU - Elphinstone P AU - Evans V AU - Godwin J AU - Gray R AU - Harwood C AU - Hicks C AU - James S AU - MacKinnon E AU - McGale P AU - McHugh T AU - Mead G AU - Peto R AU - Wang Y AU - Albano J AU - de Oliveira CF AU - Gervasio H AU - Gordilho J AU - Johansen H AU - Mouridsen HT AU - Gelman RS AU - Harris JR AU - Henderson IC AU - Shapiro CL AU - Andersen KW AU - Axelsson CK AU - Blichert-Toft M AU - Moller S AU - Mouridsen HT AU - Overgaard J AU - Overgaard M AU - Rose C AU - Cartensen B AU - Palshof T AU - Trampisch HJ AU - Dalesio O AU - de Vries EGE AU - Rodenhuis S AU - van Tinteren H AU - Comis RL AU - Davidson NE AU - Gray R AU - Robert N AU - Sledge G AU - Tormey DC AU - Wood W AU - Cameron D AU - Chetty U AU - Forrest P AU - Jack W AU - Rossbach J AU - Klijn JGM AU - Treurniet-Donker AD AU - van Putten WLJ AU - Costa A AU - Veronesi U AU - Bartelink H AU - Duchateau L AU - Legrand C AU - Sylvester R AU - van der Hage JA AU - van de Velde CJH AU - Cunningham MP AU - Catalano R AU - Creech RH AU - Bonneterre J AU - Fargeot P AU - Fumoleau P AU - Kerbrat P AU - Namer M AU - Jonat W AU - Kaufmann M AU - Schumacher M AU - von Minckwitz G AU - Bastert G AU - Rauschecker H AU - Sauer R AU - Sauerbrei W AU - Schauer A AU - Schumacher M AU - de Schryver A AU - Vakaet L AU - Belfiglio M AU - Nicolucci A AU - Pellegrini F AU - Sacco M AU - Valentini M AU - McArdle CS AU - Smith DC AU - Galligioni E AU - Boccardo F AU - Rubagotti A AU - Dent DM AU - Gudgeon CA AU - Hacking A AU - Erazo A AU - Medina JY AU - Izuo M AU - Morishita Y AU - Takei H AU - Fentiman IS AU - Hayward JL AU - Rubens RD AU - Skilton D AU - Graeff H AU - Janicke F AU - Meisner C AU - Scheurlen H AU - Kaufmann M AU - von Fournier D AU - Dafni U AU - Fountzilas G AU - Klefstrom P AU - Blomqvist C AU - Saarto T AU - Margreiter R AU - Asselain B AU - Salmon RJ AU - Vilcoq JR AU - Arriagada R AU - Hill C AU - Laplanche A AU - Le MG AU - Spielmann M AU - Bruzzi P AU - Montanaro E AU - Rosso R AU - Sertoli MR AU - Venturini M AU - Amadori D AU - Benraadt J AU - Kooi M AU - van de Velde AO AU - van Dongen JA AU - Vermorken JB AU - Castiglione M AU - Cavalli F AU - Coates A AU - Collins J AU - Forbes J AU - Gelber RD AU - Goldhirsch A AU - Lindtner J AU - Price KN AU - Rudenstam CM AU - Senn HJ AU - Bliss JM AU - Chilvers CED AU - Coombes RC AU - Hall E AU - Marty M AU - Borovik R AU - Brufman G AU - Hayat H AU - Robinson E AU - Wigler N AU - Bonadonna G AU - Camerini T AU - De Palo G AU - Del Vecchio M AU - Formelli F AU - Valagussa P AU - Martoni A AU - Pannuti F AU - Cocconi G AU - Colozza A AU - Camisa R AU - Aogi K AU - Takashima S AU - Abe O AU - Ikeda T AU - Inokuchi K AU - Kikuchi K AU - Sawa K AU - Sonoo H AU - Korzeniowski S AU - Skolyszewski J AU - Ogawa M AU - Yamashita J AU - Bonte J AD - Radcliffe Infirm, Clin Trial Serv Unit, EBCTCG Secretariat, Oxford OX2 6HE, EnglandACETBC, Tokyo, JapanAddenbrookes Hosp, Cambridge, EnglandATLAS Trial Collaborat Study Grp, Oxford, EnglandAuckland Breast Canc Study Grp, Auckland, New ZealandAustralian New Zealand Breast Canc Trials Grp, Sydney, NSW, AustraliaAustrian Breast Canc Study Grp, Vienna, AustriaWestern Infirm & Associated Hosp, Beatson Oncol Ctr, Glasgow G11 6NT, Lanark, ScotlandBelgian Adjuvant Breast Canc Project, Liege, BelgiumBerlin Buch Akad Wissensch, Berlin, GermanyBirmingham Gen Hosp, Birmingham, W Midlands, EnglandBordeaux Inst Bergonie, Bordeaux, FranceInst Jules Bordet, B-1000 Brussels, BelgiumBradford Royal Infirm, Bradford, W Yorkshire, EnglandCtr Comprehens Canc, Breast Canc Study Grp, Limburg, NetherlandsBritish Columbia Canc Agcy, Vancouver, BC V5Z 4E6, CanadaCanc & Leukemia Grp B, Washington, DC, USACanc Care Ontario, Toronto, ON, CanadaRussian Acad Med Sci, Canc Res Ctr, Moscow, RussiaCanc Res UK, London, EnglandCase Western Reserve Univ, Cleveland, OH 44106, USACent Oncol Grp, Milwaukee, WI, USACtr Claudius Regaud, Toulouse, FranceCtr Leon Berard, F-69373 Lyon, FranceCtr Paul Lamarque, Montpellier, FranceCtr Reg Francois Baclesse, Caen, FranceCtr Rene Huguenin, St Cloud, FranceCharles Univ, Prague, Czech RepublicCheltenham Gen Hosp, Cheltenham, Glos, EnglandUniv Chicago, Chicago, IL 60637, USAChristie Hosp & Holt Radium Inst, Manchester M20 9BX, Lancs, EnglandCoimbra Inst Oncol, Coimbra, PortugalCopenhagen Radium Ctr, Copenhagen, DenmarkDana Farber Canc Inst, Boston, MA 02115, USADanish Breast Canc Cooperat Grp, Copenhagen, DenmarkDanish Canc Registry, Copenhagen, DenmarkUniv Dusseldorf, D-4000 Dusseldorf, GermanyUniv Groningen, Univ Med Ctr Groningen, Dutch Working Party Autologous Bone Marrow Transp, Groningen, NetherlandsEastern Cooperat Oncol Grp, Boston, MA, USAEdinburgh Breast Unit, Edinburgh, Midlothian, ScotlandElim Hosp, Hamburg, GermanyDr Daniel den Hoed Canc Ctr, Erasmus MC, NL-3008 AE Rotterdam, NetherlandsEuropean Inst Oncol, Milan, ItalyEuropean Org Res Treatment Canc, Brussels, BelgiumNorthwestern Univ, Evanston Hosp, Evanston, IL 60201, USAFox Chase Canc Ctr, Philadelphia, PA 19111, USAFrench Adjuvant Study Grp, Guyancourt, FranceGABG, Frankfurt, GermanyGerman Breast Canc Study Grp, Freiburg, GermanyState Univ Ghent Hosp, Ghent, BelgiumGIVIO Interdisciplinary Grp Canc Care Evaluat, Chieti, ItalyGlasgow Victoria Infirm, Glasgow, Lanark, ScotlandGrp Oncol Clin Cooperat Nord Est, Aviano, ItalyGrp Ric Ormono Chemio Terapia Adiuvante, Genoa, ItalyGroote Schuur Hosp, ZA-7925 Cape Town, South AfricaGuadalajara Hosp 20 Noviembre, Mexico City, DF, MexicoGunma Univ, Gunma, JapanGuys Hosp, London SE1 9RT, EnglandUniv Hamburg, Hamburg, GermanyHeidelberg Univ I, Heidelberg, GermanyHeidelberg Univ II, Heidelberg, GermanyHellen Cooperat Oncol Grp, Athens, GreeceHelsinki Deaconess Med Ctr, Helsinki, FinlandUniv Helsinki, FIN-00014 Helsinki, FinlandInnsbruck Univ, A-6020 Innsbruck, AustriaInst Curie, Paris, FranceInst Gustave Roussy, Paris, FranceInst Nazl Ric Canc, Genoa, ItalyInst Oncol Romagnolo, Forli, ItalyIntegraal Kankerctr, Amsterdam, NetherlandsInt Breast Canc Study Grp Ludwig, Bern, SwitzerlandCharing Cross Hosp, Int Collaborat Canc Grp, London, EnglandIsrael NSABC, Tel Aviv, IsraelIst Nazl Studio & Cura Tumori, I-20133 Milan, ItalyItalian Cooperat Chemoradiosurg Grp, Bologna, ItalyItalian Oncol Grp Clin Res, Parma, ItalyJapan Clin Oncol Grp, Breast Canc Study Grp, Matsuyama, Ehime, JapanJapanese Fdn Multidisciplinary Treatment Canc, Tokyo, JapanKawasaki Med Univ, Kawasaki, Kanagawa, JapanKrakow Inst Oncol, Krakow, PolandKumamoto Univ Grp, Kumamoto, JapanLeuven Akad Ziekenhuis, Gasthuisberg, BelgiumMarseille Lab Cancerol Biol APM, Marseille, FranceMem Sloan Kettering Canc Ctr, New York, NY 10021, USAMetaxas Mem Canc Hosp, Athens, GreeceMexican Natl Med Ctr, Mexico City, DF, MexicoNCI, Bethesda, MD 20892, USANatl Canc Inst, Bari, ItalyNatl Canc Inst Canada Clin Trials Grp, Kingston, ON, CanadaNSABP, Pittsburgh, PA, USANolvadex Adjuvant Trial Org, London, EnglandMayo Clin, N Cent Canc Treatment Grp, Rochester, MN, USAN Sweden Breast Canc Grp, Umea, SwedenNW British Surg, Manchester, Lancs, EnglandNorthwick Pk Hosp & Clin Res Ctr, London, EnglandNorwegian Breast Canc Grp, Oslo, NorwayNorwegian Radium Hosp, Oslo, NorwayCity Hosp Nottingham, Nottingham, EnglandOncofrance, Paris, FranceOntario Clin Oncol Grp, Toronto, ON, CanadaOsaka City Univ, Osaka, JapanOsaka Natl Hosp, Osaka, JapanChurchill Hosp, Oxford OX3 7LJ, EnglandParma Hosp, Parma, ItalyNN Petrov Oncol Res Inst, St Petersburg, RussiaPiedmont Oncol Assoc, Winston Salem, NC, USAPrefectural Hosp, Oita, JapanUniv Pretoria, ZA-0002 Pretoria, South AfricaRoyal Marsden Hosp, Inst Canc Res, London SW3 6JJ, EnglandUniv London St Georges Hosp, London, EnglandSt Lukes Hosp, Dublin, IrelandSardinia Oncol Hosp A Businico, Cagliari, ItalySASIB Int Trialists, Cape Town, South AfricaSaskatchewan Canc Fdn, Regina, SK, CanadaScandinavian Adjuvant Chemotherapy Study Grp, Oslo, NorwayScottish Canc Therapy Network, Edinburgh, Midlothian, ScotlandS Sweden Breast Canc Grp, Lund, SwedenSE Sweden Breast Canc Grp, Linkoping, SwedenSE Canc Study Grp, Birmingham, AL, USAAlabama Breast Canc Project, Birmingham, AL, USASW Oncol Grp, San Antonio, TX, USAStockholm Breast Canc Study Grp, Stockholm, SwedenSwiss Grp Clin Canc Res, Bern, SwitzerlandOSAKO, St Gallen, SwitzerlandTel Aviv Univ, IL-69978 Tel Aviv, IsraelTokyo Canc Inst Hosp, Tokyo, JapanToronto Edmonton Breast Canc Study Grp, Toronto, ON, CanadaToronto Princess Margaret Hosp, Toronto, ON, CanadaChinese Acad Med Sci, Tumour Hosp, Beijing 100037, Peoples R ChinaTunis Inst Salah Azaiz, Tunis, TunisiaUK Multictr Canc Chemotherapy Study Grp, London, EnglandUK Asia Collaborat Breast Canc Grp, London, EnglandUniv Naples Federico II, Naples, ItalyUniv Texas, MD Anderson Canc Ctr, Houston, TX 77030, USAUppsala Orebro Breast Canc Study Grp, Uppsala, SwedenUniv Hosp Vienna, Dept Gynaecol 1, Vienna, AustriaWessex Radiotherapy Ctr, Southampton, Hants, EnglandW Midlands Oncol Assoc, Birmingham, W Midlands, EnglandW Scotland Breast Trial Grp, Glasgow, Lanark, ScotlandWestern Canc Study Grp, Torrance, CA, USAUniv Wurzburg, D-97070 Wurzburg, GermanyClarke, M, Radcliffe Infirm, Clin Trial Serv Unit, EBCTCG Secretariat, Oxford OX2 6HE, England TI - Effects of chemotherapy and hormonal therapy for early breast cancer on recurrence and 15-year survival: an overview of the randomised trials AB - Background Quinquennial overviews (1985-2000) of the randomised trials in early breast cancer have assessed the 5-year and 10-year effects of various systemic adjuvant therapies on breast cancer recurrence and survival. Here, we report the 10-year and 15-year effects. Methods Collaborative meta-analyses were undertaken of 194 unconfounded randomised trials of adjuvant chemotherapy or hormonal therapy that began by 1995. Many trials involved CMF (cyclophosphamide, methotrexate, fluorouracil), anthracycline-based combinations such as FAC (fluorouracil, doxombicin, cyclophosphamide) or FEC (fluorouracil, epirubicin, cyclophosphamide), tamoxifen, or ovarian suppression: none involved taxanes, trastuzumab, raloxifene, or modem aromatase inhibitors. Findings Allocation to about 6 months of anthracycline-based polychemotherapy (eg, with FAC or FEC) reduces the annual breast cancer death rate by about 38% (SE 5) for women younger than 50 years of age when diagnosed and by about 20% (SE 4) for those of age 50-69 years when diagnosed, largely irrespective of the use of tamoxifen and of oestrogen receptor (ER) status, nodal status, or other tumour characteristics. Such regimens are significantly (2p=0 . 0001 for recurrence, 2p<0 . 00001 for breast cancer mortality) more effective than CMF chemotherapy. Few women of age 70 years or older entered these chemotherapy trials. For ER-positive disease only, allocation to about 5 years of adjuvant tamoxifen reduces the annual breast cancer death rate by 31% (SE 3), largely irrespective of the use of chemotherapy and of age (<50, 50-69, >= 70 years), progesterone receptor status, or other tumour characteristics. 5 years is significantly (2p<0 . 00001 for recurrence, 2p=0 . 01 for breast cancer mortality) more effective than just 1-2 years of tamoxifen. For ER-positive tumours, the annual breast cancer mortality rates are similar during years 0-4 and 5-14, as are the proportional reductions in them by 5 years of tamoxifen, so the cumulative reduction in mortality is more than twice as big at 15 years as at 5 years after diagnosis. These results combine six meta-analyses: anthracycline-based versus no chemotherapy (8000 women); CMF-based versus no chemotherapy (14 000); anthracycline-based versus CMF-based chemotherapy (14 000); about 5 years of tamoxifen versus none (15 000); about 1-2 years of tamoxifen versus none (33 000); and about 5 years versus 1-2 years of tamoxifen (18 000). Finally, allocation to ovarian ablation or suppression (8000 women) also significantly reduces breast cancer mortality, but appears to do so only in the absence of other systemic treatments. For middle-aged women with ER-positive disease (the commonest type of breast cancer), the breast cancer mortality rate throughout the next 15 years would be approximately halved by 6 months of anthracycline-based chemotherapy (with a combination such as FAC or FEC) followed by 5 years of adjuvant tamoxifen. For, if mortality reductions of 38% (age <50 years) and 20% (age 50-69 years) from such chemotherapy were followed by a further reduction of 31% from tamoxifen in the risks that remain, the final mortality reductions would be 57% and 45%, respectively (and, the trial results could well have been somewhat stronger if there had been full compliance with the allocated treatments). Overall survival would be comparably improved, since these treatments have relatively small effects on mortality from the aggregate of all other causes. Interpretation Some of the widely practicable adjuvant drug treatments that were being tested in the 1980s, which substantially reduced 5-year recurrence rates (but had somewhat less effect on 5-year mortality rates), also substantially reduce 15-year mortality rates. Further improvements in long-term survival could well be available from newer drugs, or better use of older drugs MH - Australia MH - Austria MH - Belgium MH - Canada MH - Czech Republic MH - Denmark MH - United Kingdom MH - Finland MH - France MH - Germany MH - Greece MH - Ireland MH - Israel MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - Netherlands MH - New Zealand MH - Norway MH - Peoples R China MH - Poland MH - Portugal MH - Russia MH - South Africa MH - Sweden MH - Switzerland MH - Tunisia MH - USA PB - LONDON: LANCET LTD RP - NOT IN FILE U3 - TC 687 U4 - Medicine, General & Internal U5 - J;Article AV - English IS - 0140-6736 UR - ISI:000229082300022 L2 - TAMOXIFEN; DEATHS SO - Lancet 2005 ;365(9472):1687-1717 12926 UI - 271 AU - Abraham A AU - Grosan C AU - Han SY AU - Gelbukh A AD - Chung Ang Univ, Sch Comp Sci & Engn, Seoul 156756, South Korea. Univ Babes Bolyai, Dept Comp Sci, R-3400 Cluj Napoca, Romania. IPN, CIC, Mexico City 07738, DF, Mexico TI - Evolutionary multiobjective optimization approach for evolving ensemble of intelligent paradigms for stock market modeling AB - The use of intelligent systems for stock market predictions has been widely established. This paper introduces a genetic programming technique (called Multi-Expression programming) for the prediction of two stock indices. The performance is then compared with an artificial neural network trained using Levenberg-Marquardt algorithm, support vector machine, Takagi-Sugeno neuro-fuzzy model and a difference boosting neural network. As evident from the empirical results, none of the five considered techniques could find an optimal solution for all the four performance measures. Further the results obtained by these five techniques are combined using an ensemble and two well known Evolutionary Multiobjective Optimization (EMO) algorithms namely Non-dominated Sorting Genetic Algorithm II (NSGA II) and Pareto Archive Evolution Strategy (PAES) algorithms in order to obtain an optimal ensemble combination which could also optimize the four different performance measures (objectives). We considered Nasdaq-100 index of Nasdaq Stock Market and the S&P CNX NIFTY stock index as test data. Empirical results reveal that the resulting ensemble obtain the best results MH - Mexico|Distrito Federal MH - Romania MH - South Korea T3 - MICAI 2005: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - ON REQUEST (05/05/08) U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleajith.abraham@ieee.org cgrosan@cs.ubbcluj.ro hansy@cau.ac.kr gelbukh@gelbukh.com0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBDJ68 AV - English IS - 0302-9743 UR - ISI:000233852000068 SO - 2005 ;():673-681 12927 UI - 173 AU - Abrashkin VI AU - Alexandrov VV AU - Arakcheev YA AU - Bitkin VE AU - Cordero A AU - Eremin SA AU - Garipov GK AU - Grebenyuk VM AU - Kalmykov NN AU - Khrenov BA AU - Koval VV AU - Martinez O AU - Matyushkin AM AU - Moreno E AU - Naumov DV AU - Shat NM AU - Panasyuk MI AU - Park IH AU - Porokhovoi SY AU - Robledo C AU - Rubinstein IA AU - Sharakin SA AU - Silaev AA AU - Sabirov BM AU - Salazar H AU - Saprykin OA AU - Slunechka M AU - Syromyatnikov VS AU - Tkatchev LG AU - Tkachenko AV AU - Tulupov VI AU - Tyukaev RI AU - Urmantsev FF AU - Villasenor L AU - Yashin IV AU - Zepeda A AD - Special Construct Bur Progress, Samara, RussiaMoscow MV Lomonosov State Univ, Dept Appl Res, Moscow, RussiaSpecial Construct Bur Luch, Syzran, RussiaUniv Puebla, Puebla 72000, MexicoJoint Inst Nucl Res, Moscow 141980, RussiaMoscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, Moscow 1199899, RussiaEWHA Womans Univ, Seoul 120, South KoreaUniv Michiocan, Michiocan, MexicoCinvestav IPN, Dept Fis, Mexico City 07360, DF, MexicoAbrashkin, VI, Special Construct Bur Progress, Samara, Russia TI - Preparation of the TUS space experiment for UHECR study AB - We report on the current status of the TUS space mission project: its goals and the progress achieved so far. The Fresnel mirrors design, performed checks and their production are discussed. Also we discuss our future plans including auxiliary analysis of the fluorescence light yield measured this year by LAPP (Annecy), JINR (Dubna) and LIP (Lisbon) MACFLY Collaboration MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - Mexico|Puebla MH - Russia MH - South Korea PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000234702700077 L2 - TUS;UHECR;Fresnel optics SO - International Journal of Modern Physics A 2005 ;20(29):6865-6868 12928 UI - 157 AU - Abrego BM AU - Arkin EM AU - Fernandez-Merchant S AU - Hurtado F AU - Kano M AU - Mitchell JSB AU - Urrutia J AD - Calif State Univ Northridge, Dept Math, Northridge, CA 91330, USASUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794, USAUniv Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, SpainIbaraki Univ, Ibaraki, JapanUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoAbrego, BM, Calif State Univ Northridge, Dept Math, Northridge, CA 91330 USA TI - Matching points with circles and squares AB - Given a class C of geometric objects and a point set P, a C-matching of P is a set M = {C1,..., Ck} of elements of C such that each C-i contains exactly two elements of P. If all of the elements of P belong to some Ci, M is called a perfect matching; if in addition all the elements of M are pairwise disjoint we say that this matching M is strong. In this paper we study the existence and properties of C-matchings for point sets in the plane when C is the set of circles or the set of isothetic squares in the plane MH - USA MH - Japan MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000234715100001 SO - Discrete and Computational Geometry 2005 ;3742():1-15 12929 UI - 2552 AU - Aburto J AU - Alric I AU - Borredon E AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoInst Natl Polytech Toulouse, Lab Chim Agroind, ENSIACET, Toulouse 4, FranceAburto, J, Inst Mexicano Petr, Av Lazaro Cardenas,152, Mexico City 07730, DF, Mexico TI - Organic solvent-free transesterification of various starches with lauric acid methyl ester a and triacyl glycerides AB - This study deals with the organic solvent-free synthesis of fatty acid esters of high-amylose maize (amylomaize) starch by transesterification with lauric acid methyl ester using potassium laurate as catalyst. The process involves thermal pretreatment of amylomaize in order to swell the polysaccharide and increase its accessibility and reaction with the esterification reagent. The swelling degree (Q) was monitored by UV-Vis spectrophotometry and scanning electron microscopy (SEM), whilst the formation of a complex between amylose and potassium laurate was confirmed by X-ray diffraction and FTIR studies. The transesterification reaction was carried out at 190 degrees C and a central composite design was used to obtain the corresponding contour plots with a second order model (gamma = beta(0) + beta(1)X(1) + beta(2)X(2) + beta(12)X(1) X-2 + beta(11) X-1 X-1 + beta(22) X2X2) and a confidence interval of 95%. The experimental design consisted of two independent variables, reaction time (2-6 h) and catalyst (2.2 - 33.8 meq catalyst per eq. glucose), and two dependent variables, the degree of substitution (DS) and the yield of the amylomaize starch ester (Y,%). Maximum transesterification of amylomaize starch (DS = 0.61) was obtained after 4:30 h at 190 degrees C with an intermediate concentration of catalyst (18 meq per eq. glucose). Finally, the optimized results were extended to other starch sources and vegetable oils MH - France MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0038-9056 UR - ISI:000228419200005 L2 - starch esters;transesterification;triacyl glyceride;modification;BLENDS SO - Starch-Starke 2005 ;57(3-4):145-152 12930 UI - 1843 AU - Acero A AU - Tavera JJ AU - Reyes J AD - Univ Nacl Colombia, Inst Ciencias Nat, Santa Marta, ColombiaCICIMAR IPN, La Paz, Baja Calif Sur, MexicoInst Invest Marinas & Costeras, Santa Marta, ColombiaAcero, A, Univ Nacl Colombia, Inst Ciencias Nat, Apartado 1016,Cerro de Punta Betin INVEMAR, Santa Marta, Colombia TI - Systematics of the genus Bagre (Siluriformes : Ariidae): A morphometric approach AB - A preliminary morphometric, Wdy based on 17 landmarks was carried out, using 104 specimens of six species of sea catfishes from both South American coasts, the four accepted species of the genus Bagre and two reference species (Ariopsis seemanni and Arius platypogon). The landmarks were mainly located on the head and at the origin and end of fins. The partial warps weighted matrix was used to perform the discriminant analysis and the species pair-wise comparisons in order to establish if there were differences between the species. Thereafter, a partial-warps weighted matrix was generated with the average species consensus. Using PHYLIP maximum likelihood routine (CONTML), an additive tree was obtained. Shape changes were described over the tree using TPS tree (square change parsimony). Bagre marinus (western Atlantic) seems to be the most basal species of the genus. The species showing the larger shape changes are B. pinnimaculatus (eastern Pacific) and B. bagre (western Atlantic). Those two species are apparently more closely related to each other than to the other two species of Bagre MH - Colombia MH - Mexico|Baja California Sur PB - PARIS: SOC FRANCAISE D ICHTYOLOGIE RP - NOT IN FILE U3 - TC 2 U4 - Zoology U5 - J;Article AV - English IS - 0399-0974 UR - ISI:000230426100003 L2 - Ariidae;Bagre;sea catfishes;ASE;ASW;phylogenetic;morphometrics;GEOMETRIC MORPHOMETRICS; PARTIAL WARPS; CHARACTERS; PHYLOGENY; ONTOGENY SO - Cybium 2005 ;29(2):127-133 12931 UI - 1298 AU - Aceves R AU - Piters TM AU - Zazubovich S AD - Univ Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoUniv Tartu, Inst Phys, EE-51014 Tartu, EstoniaAceves, R, Univ Sonora, Ctr Invest Fis, Apartado Postal 5-88, Hermosillo 83190, Sonora, Mexico TI - Luminescence of excitons and Eu(2+)v(c)(-) centres in KI : Eu2+ crystals AB - Luminescence characteristics of KI:Eu2+ crystals are studied at 11.5-300K under excitation in the 3.0-6.3 eV energy range. Besides the known 2.88 eV emission of EU(2+)v(c)(-) centers, the new emission bands peaking at similar to 3.75 eV, similar to 3.3 eV, 3.06 eV, and 2.38 eV are found. The bands, located in the 3.1-4.3 eV energy range and strongly distorted due to their overlap with the Eu(2+)v(c)(-) absorption bands, are ascribed to the self-trapped exciton emission. The 3.06 eV and 2.88 eV bands are ascribed to the electronic transitions from two close levels of the splitted T-2g excited state of an Eu2+ ion. The 2.38 eV emission is ascribed to the radiative decay of an exciton localized near an Eu2+ ion. It is assumed that the appearance of the self- trapped exciton emission under excitation in the Eu2+ -related absorption bands is connected with the radiative decay of excitons, which are formed at the recombination of electrons and holes, produced in the crystal as a result of the photostimulated charge transfer from the Eu2+-perturbed I- states MH - Estonia MH - Mexico|Sonora PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000231506200021 L2 - DOPED ALKALI-HALIDES; X-RAY; PHOTOSTIMULATED LUMINESCENCE; ULTRAVIOLET-IRRADIATION; DOSIMETRIC PROPERTIES; MIXED-CRYSTALS; THERMOLUMINESCENCE; EUROPIUM; KCL-EU2+; BETA SO - Physica Status Solidi B-Basic Solid State Physics 2005 ;242(10):2121-2128 12932 UI - 3085 AU - Acosta P AU - Varon J AU - Sternbach GL AU - Baskett P AD - Univ Texas, Hlth Sci Ctr, St Lukes Episcopal Hosp, Houston, TX 77030, USAUniv Autonoma Tamaulipas, Sch Med, Tampico, MexicoStanford Univ, Med Ctr, Stanford, CA 94305, USAVaron, J, Univ Texas, Hlth Sci Ctr, St Lukes Episcopal Hosp, 2219 Dorrington St, Houston, TX 77030 USA TI - Kouwenhoven, Jude and Knickerbocker - The introduction of defibrillation and external chest compressions into modern resuscitation MH - Mexico|Tamaulipas MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 2 U4 - Critical Care Medicine;Emergency Medicine U5 - J;Editorial Material AV - English IS - 0300-9572 UR - ISI:000227025500003 L2 - cardiac arrest;resuscitation;cardiac massage;history;external chest compressions;basic life support;CARDIAC MASSAGE; CARDIOPULMONARY-RESUSCITATION; VENTRICULAR-FIBRILLATION; VENTILATION; HISTORY; HEART SO - Resuscitation 2005 ;64(2):139-143 12933 UI - 222 AU - Acosta PB AU - Yannicelli S AU - Ryan AS AU - Arnold G AU - Marriage BJ AU - Plewinska M AU - Bernstein L AU - Fox J AU - Lewis V AU - Miller M AU - Velazquez A AD - Abbott Labs, Ross Prod Div, Columbus, OH, USAUniv Rochester, Med Ctr, Rochester, NY 14642, USAUniv Alberta Hosp, Edmonton, AB T6G 2B7, CanadaUniv Miami, Med Ctr, Miami, FL 33152, USAChildrens Hosp, Denver, CO 80218, USASchneider Childrens Hosp, New Hyde Pk, NY 11042, USAAlbert Einstein Coll Med, New Hyde Pk, NY 11042, USATulane Univ, Med Ctr, New Orleans, LA 70118, USAChildrens Med Ctr, Dayton, OH, USAInst Nacl Pediat, Mexico City, DF, MexicoAcosta, PB, 124 Camry Lane, Grayson, GA 30017, USA TI - Nutritional therapy improves growth and protein status of children with a urea cycle enzyme defect AB - Background: Poor growth has been described in patients with urea cycle enzyme defects treated with protein-restricted diets, while protein status is seldom reported. Objective: To assess the effects of nutritional therapy with a medical food on growth and protein status of patients with a urea cycle enzyme defect. Methods: A 6-mo multicenter outpatient study was conducted with infants and toddlers managed by nutrition therapy with Cyclinex-1 Amino Acid-Modified Medical Food with Iron (Ross Products Division, Abbott Laboratories, Columbus, OH). Main outcome variables were anthropometrics and plasma amino acids (selected), albumin, and transthyretin concentrations. Results: Seventeen patients completed the study. Mean (+/- SE) baseline age was 11.30 +/- 3.20 months (median 4.40 months; range 0.22 +/- 38.84 months). Length and weight z-scores increased significantly during the 6-month study. Head circumference increased, but not significantly. Three patients were stunted and two were wasted (-2.0 z-score) at baseline while at study end, only one patient was both stunted and wasted. The majority of patients increased in length, head circumference, and weight z-scores during study. Mean (+/- SE) plasma albumin concentration increased from 34 +/- 2 g/L at baseline to 38 +/- 1 g/L at study end. Plasma transthyretin increased from a mean (+/- SE) of 177 +/- 13 mg/L at baseline to 231 +/- 15 mg/L at study end. No correlation was found between plasma NH3 concentrations and medical food intake. Plasma NH3 concentration was positively correlated with the percentage of Food and Agriculture Organization/ World Health Organization/United Nations recommended protein ingested. Conclusions: Intakes of adequate protein and energy for age result in anabolism and linear growth without increasing plasma NH3 concentrations. Medical food intakes did not correlate with plasma NH3 concentrations. (c) 2005 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Genetics & Heredity;Medicine, Research & Experimental U5 - J;Article AV - English IS - 1096-7192 UR - ISI:000234282500005 L2 - protein status;growth;urea cycle enzyme defects;nutrition management;INBORN-ERRORS; MANAGEMENT; DISORDERS; HYPERARGININEMIA; TRYPTOPHAN; ARGININEMIA; METABOLISM; SURVIVAL; ENERGY; ACID SO - Molecular Genetics and Metabolism 2005 ;86(4):448-455 12934 UI - 1996 AU - Adams GD AU - Cintas PG AU - Llabres XTM AD - Tech Univ Catalonia, Dept Stat & Operat Res, Barcelona 08028, SpainUniv Veracruzana, Escuela Estadist, Xalapa 91000, Veracruz, MexicoCintas, PG, Tech Univ Catalonia, Dept Stat & Operat Res, Ave Diagonal 647, Barcelona 08028, Spain TI - Experimentation order in factorial designs with 8 or 16 runs AB - Randomizing the order of experimentation in a factorial design does not always achieve the desired effect of neutralizing the influence of unknown factors. In fact, with some very reasonable assumptions, an important proportion of random orders afford the same degree of protection as that obtained by experimenting in the design matrix standard order. In addition, randomization can induce a big number of changes in factor levels and thus make experimentation expensive and difficult. This paper discusses this subject and suggests experimentation orders for designs with 8 or 16 runs that combine an excellent level of protection against the influence of unknown factors, with the minimum number of changes in factor levels MH - Mexico|Veracruz MH - Spain PB - ABINGDON: ROUTLEDGE TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0266-4763 UR - ISI:000229747400008 L2 - randomization;experimentation order;factorial design;bias protection;minimum number of level changes SO - Journal of Applied Statistics 2005 ;32(3):297-313 12935 UI - 113 AU - Afrailmovich V AU - Young T AD - UASLP, IICO, San Luis Potosi 78000, SLP, MexicoOhio Univ, Dept Math, Athens, OH 45701, USAAfrailmovich, V, UASLP, IICO, A Obregon 64, San Luis Potosi 78000, SLP, Mexico TI - Multipliers of homoclinic tangencies and a theorem of Gonchenko and Shilnikov on area preserving maps AB - We investigate differential invariants for homoclinic tangencies and discuss the role of these invariants in the Hausdorff dimension of invariant sets associated with the tangency and its unfoldings. Further, we give a streamlined proof of a, theorem of Goncheko and Shilnikov on the case of a tangency in an area preserving map. Specifically, the invariants determine whether or not a hyperbolic invariant set is formed near the tangency MH - Mexico|San Luis Potosi MH - USA PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Multidisciplinary Sciences U5 - J;Article AV - English IS - 0218-1274 UR - ISI:000235355800014 L2 - differential invariant;hyperbolic horseshoe;ORBITS SO - International Journal of Bifurcation and Chaos 2005 ;15(11):3589-3594 12936 UI - 1908 AU - ago-Cisneros L AU - Rodriguez-Coppola H AU - Perez-Alvarez R AU - Pereyra P AD - UAM Azcapotzalco, Dept Ciecias Basicas, Azcapotzalco 02200, DF, MexicoUniv La Habana, Fac Fis, Dept Fis Aplicada, Havana 10400, CubaUniv La Habana, Fac Fis, Dept Fis Teor, Havana 10400, CubaDiago-Cisneros, L, UAM Azcapotzalco, Dept Ciecias Basicas, Azcapotzalco 02200, DF, Mexico TI - Symmetries and general principles in the multiband effective mass theory: A transfer matrix study AB - We study the time reversal and space inversion symmetry properties of the transfer matrices mostly used in the calculation of energy spectra and transport-process quantities. We determine the unitary transformation relating transfer matrices. We consider the Kohn-Luttinger model for a quasi-2D system and show that even though the system studied in the (4 x 4) scheme satisfies all the symmetry requirements. the (2 x 2) subspaces do not fulfill such constrains. except in the F point of the Brillouin Zone. We find new exchange properties between the (2 x 2) subspace quantities MH - Cuba MH - Mexico|Distrito Federal PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-8949 UR - ISI:000230087300003 L2 - TIME-REVERSAL SYMMETRY; DOUBLE-QUANTUM-WELLS; SEMICONDUCTOR HETEROSTRUCTURES; SUBBAND STRUCTURE; HOLE SUBBANDS; DONOR STATES; APPROXIMATION; ELECTRONS; HETEROJUNCTIONS; MICROSTRUCTURES SO - Physica Scripta 2005 ;71(6):582-588 12937 UI - 2012 AU - Agrati D AU - Fernandez-Guasti A AU - Zuluaga MJ AU - Uriarte N AU - Pereira M AU - Ferreira A AD - Fac Ciencias, Secc Fisiol, Montevideo, UruguayFac Ciencias, Lab Neurociencias, Montevideo 4225, UruguayCINVESTAV, Dept Farmacobiol, Mexico City 14000, DF, MexicoFerreira, A, Fac Ciencias, Secc Fisiol, Igua 4225, Montevideo, Uruguay TI - Compulsive-like behaviour according to the sex and the reproductive stage of female rats AB - The aim of the present study was to explore putative differences in the responses assessed in an animal model of obsessive-Compulsive disorder (OCD) according to the sex and the reproductive cycle of female rats. The model consists of the induction of perseveration (repetitive choices of the same arm in a T-maze) by 8-OH-DPAT (1.0 mg/kg). Males and females (pooled in all stages of their oestrous cycle) persevered after 8-OH-DPAT administration and no differences were observed between groups. During the oestrous cycle, this 5-HT1A agonist induced perseveration in metoestrus, dioestrus and prooestrus and reduced levels of this behaviour in oestrus. 8-OH-DPAT provoked perseveration in mid-gestation, an effect that was reduced in late-gestation and blocked during lactation. Reproductive cycle changes in the induced perseveration are discussed from the standpoint of the ovarian steroids' action on the serotoninergic system and on the bases of the variations in stress responsiveness along the reproductive cycle of the female. Present results validate the use of females in this model of OCD and could be relevant for studying the role of reproductive hormones in the pathophysiology of this disorder. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Uruguay PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0166-4328 UR - ISI:000229809600018 L2 - obsessive-compulsive disorder;oestrous cycle;pregnancy;lactation;ovarian steroids;serotonin;8-OH-DPAT;SPONTANEOUS-ALTERNATION BEHAVIOR; PITUITARY-ADRENAL ACTIVITY; 5-HT1A RECEPTOR AGONIST; DORSAL RAPHE NUCLEUS; ESTROUS-CYCLE; LACTATING RATS; ANIMAL-MODEL; FOOD-INTAKE; PARAVENTRICULAR NUCLEUS; HYPOTHALAMIC SEROTONIN SO - Behavioural Brain Research 2005 ;161(2):313-319 12938 UI - 3317 AU - Aguayo F AU - Gallagher KP AD - Fletcher Sch Law & Diplomacy, Global Dev & Environm Inst, Medford, MA 02155, USATufts Univ, Cabot Intercultural Ctr, Medford, MA 02155, USAEl Colegio Mexico, Program Sci Technol & Dev, Mexico City, DF, MexicoGallagher, KP, Fletcher Sch Law & Diplomacy, Global Dev & Environm Inst, Medford, MA 02155 USA TI - Economic reform, energy, and development: the case of Mexican manufacturing AB - Given increasing concern over global climate change and national security there is a burgeoning interest in examining the relationship between economic growth and energy use in developed and developing countries. More specifically, decoupling energy use per unit of gross domestic product (GDP) has fast come to be seen as in the interests of national economies and the world as a whole. Recent attention has been paid to the dramatic decreases in the energy intensity of the Chinese economy, which fell by 55% between 1975 and 1995. Do other developing economies follow similar trajectories? This paper examines the energy intensity of the Mexican economy for the period 1988-1998. Although the long-term trend in Mexican energy intensity is rising, the energy intensity of the Mexican economy began to decline in 1988. This paper explores the factors that have contributed to this reduction. Diminishing Mexican energy use per unit of GDP has been driven by significant decreases in industrial energy intensity. We show that these changes have resulted from changes in the composition of Mexican industrial structure and technological change. (C) 2003 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Energy & Fuels;Environmental Sciences;Environmental Studies U5 - J;Article AV - English IS - 0301-4215 UR - ISI:000226596500001 L2 - energy use;manufacturing;Mexico SO - Energy Policy 2005 ;33(7):829-837 12939 UI - 2145 AU - Agueev D AU - Pelinovsky D AD - McMaster Univ, Dept Math, Hamilton, ON L8S 4K1, CanadaUniv Autonoma Estado Mexico, Mexico City, DF, MexicoAgueev, D, McMaster Univ, Dept Math, Hamilton, ON L8S 4K1, Canada TI - Modeling of wave resonances in low-contrast photonic crystals AB - Coupled-mode equations are derived from Maxwell equations for modeling of low-contrast cubic-lattice photonic crystals in three spatial dimensions. Coupled-mode equations describe resonantly interacting Bloch waves in stop bands of the photonic crystal. We study the linear boundary-value problem for stationary transmission of four counter-propagating and two oblique waves on the plane. Well-posedness of the boundary-value problem is proved by using the method of separation of variables and generalized Fourier series. For applications in photonic optics, we compute integral invariants for transmission, reflection, and diffraction of resonant waves MH - Canada MH - Mexico|Distrito Federal PB - PHILADELPHIA: SIAM PUBLICATIONS RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0036-1399 UR - ISI:000229475500001 L2 - photonic crystals;coupled-mode equations;wave resonances;stationary transmission;boundary-value problems;NONLINEAR PERIODIC STRUCTURES; ENVELOPE-FUNCTION APPROACH; SOLITARY WAVES; EQUATIONS; LIGHT; ELECTRODYNAMICS; PROPAGATION; STABILITY; GRATINGS SO - Siam Journal on Applied Mathematics 2005 ;65(4):1101-1129 12940 UI - 2635 AU - Aguilar A AU - Emmons ED AU - Gharaibeh MF AU - Covington AM AU - Bozek JD AU - Ackerman G AU - Canton S AU - Rude B AU - Schlachter AS AU - Hinojosa G AU - Alvarez I AU - Cisneros C AU - McLaughlin BM AU - Phaneuf RA AD - Univ Nevada, Dept Phys, Reno, NV 89557, USAUniv Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, MexicoHarvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138, USAQueens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North IrelandAguilar, A, NIST, Atom Phys Div, 100 Bur Dr,Stop 8421, Gaithersburg, MD 20899 USA TI - Photoionization of ions of the nitrogen isoelectronic sequence: experiment and theory for F2+ and Ne3+ AB - Absolute photoionization measurements are reported for admixtures of the ground and metastable states of F2+ from 56.3 eV to 75.6 eV, and of Ne3+ from 89.3 eV to 113.8 eV. The S-4 degrees ground-state and the D-2 degrees and P-2 degrees metastable-state fractions present in the primary ion beams were estimated from photoion yield measurements near their respective threshold energies. Most of the observed resonance structure has been spectroscopically assigned. The measurements are compared with new R-matrix theoretical calculations and with those in the TOPbase astrophysical database. The systematic behaviour of the quantum-defect parameter is analysed as a function of the nuclear charge for four Rydberg series observed in both species, and compared to published data for O+ and N MH - USA MH - Mexico|Morelos MH - United Kingdom PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0953-4075 UR - ISI:000228249700004 L2 - X-RAY SPECTROSCOPY; CROSS-SECTIONS; RADIATIVE RECOMBINATION; OSCILLATOR-STRENGTHS; HIGH-RESOLUTION; TRANSITIONS; HELIUM; OXYGEN; STATES SO - Journal of Physics B-Atomic Molecular and Optical Physics 2005 ;38(4):343-361 12941 UI - 282 AU - Aguilar E AU - Peterson TC AU - Obando PR AU - Frutos R AU - Retana JA AU - Solera M AU - Soley J AU - Garcia IG AU - Araujo RM AU - Santos AR AU - Valle VE AU - Brunet M AU - Aguilar L AU - Alvarez L AU - Bautista M AU - Castanon C AU - Herrera L AU - Ruano E AU - Sinay JJ AU - Sanchez E AU - Oviedo GIH AU - Obed F AU - Salgado JE AU - Vazquez JL AU - Baca M AU - Gutierrez M AU - Centella C AU - Espinosa J AU - Martinez D AU - Olmedo B AU - Espinoza CEO AU - Nunez R AU - Haylock M AU - Benavides H AU - Mayorga R AD - Univ Rovira & Virgili Tarragona, Climate Change Res Grp, Geog Unit, E-43005 Tarragona, SpainNOAA, NAtl Climat Data Ctr, Climate Anal Branch, Asheville, NC, USAComite Reg Recursos Hidraul Istmo Ctr Amer, Pavas, Costa RicaPhilip Goldson Int Airport, Natl Meteorol Serv, Belize City, BelizeInst Meteorol Nacl, San Jose, Costa RicaUniv Costa Rica, San Jose 2060, Costa RicaInst Meteorol Cuba, Ctr Clima, Havana, CubaServ Nacl Estudios Terr, Serv Meteorol, San Salvador, El SalvadorMesoamer Food Secur Early Warning Syst, Guatemala City, GuatemalaInst Nacl Sismol Vulcanol Meteorol & Hidrol, Guatemala City, GuatemalaEmpresa Nacl Energia Elect, Comayaguela, HondurasServ Meteorol Nacl Honduras, Tegucigalpa, HondurasUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Dept Meteorol Gen, Mexico City 04510, DF, MexicoInst Nicaraguense Estudios Terr, Managua, NicaraguaEmpresa Transmis Elect, Panama City, PanamaAutoridad Canal Panama, Panama City, PanamaAutoridad Nacl Ambiente, Panama City, PanamaServ Meteorol, Caracas, VenezuelaUniv E Anglia, Sch Environm Sci, Climat Res Unit, Norwich NR4 7TJ, Norfolk, EnglandInst Hidrol Meteorol & Estudios Ambientales, Bogota, ColombiaAguilar, E, Univ Rovira & Virgili Tarragona, Climate Change Res Grp, Geog Unit, E-43005 Tarragona, Spain TI - Changes in precipitation and temperature extremes in Central America and northern South America, 1961-2003 AB - [1] In November 2004, a regional climate change workshop was held in Guatemala with the goal of analyzing how climate extremes had changed in the region. Scientists from Central America and northern South America brought long-term daily temperature and precipitation time series from meteorological stations in their countries to the workshop. After undergoing careful quality control procedures and a homogeneity assessment, the data were used to calculate a suite of climate change indices over the 1961 - 2003 period. Analysis of these indices reveals a general warming trend in the region. The occurrence of extreme warm maximum and minimum temperatures has increased while extremely cold temperature events have decreased. Precipitation indices, despite the large and expected spatial variability, indicate that although no significant increases in the total amount are found, rainfall events are intensifying and the contribution of wet and very wet days are enlarging. Temperature and precipitation indices were correlated with northern and equatorial Atlantic and Pacific Ocean sea surface temperatures. However, those indices having the largest significant trends ( percentage of warm days, precipitation intensity, and contribution from very wet days) have low correlations to El Nino - Southern Oscillation. Additionally, precipitation indices show a higher correlation with tropical Atlantic sea surface temperatures MH - Belize MH - Colombia MH - Costa Rica MH - Cuba MH - El Salvador MH - United Kingdom MH - Guatemala MH - Honduras MH - Mexico|Distrito Federal MH - Nicaragua MH - Panama MH - Spain MH - USA MH - Venezuela PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000234248000004 L2 - EXTENDED RECONSTRUCTION; TROPICAL ATLANTIC; PACIFIC; REVISION; TRENDS; MODEL SO - Journal of Geophysical Research-Atmospheres 2005 ;110(D23): 12942 UI - 1429 AU - Aguilar JC AU - Goodman JB AD - Inst Tecnol Autonomo Mexico, Mexico City 01000, DF, MexicoNYU, Courant Inst Math Sci, New York, NY 10012, USAAguilar, JC, Inst Tecnol Autonomo Mexico, Mexico City 01000, DF, Mexico TI - An efficient interpolation algorithm on anisotropic grids for functions with jump discontinuities in 2-D AB - In this paper we construct an algorithm that generates a sequence of continuous functions that approximate a given real valued function f of two variables that have jump discontinuities along a closed curve. The algorithm generates a sequence of triangulations of the domain of f. The triangulations include triangles with high aspect ratio along the curve where f has jumps. The sequence of functions generated by the algorithm are obtained by interpolating f on the triangulations using continuous piecewise polynomial functions. The approximation error of this algorithm is O(1/N-2) when the triangulation contains N triangles and when the error is measured in the L-1 norm. Algorithms that adaptively generate triangulations by local regular refinement produce approximation errors of size O(1/N), even if higher-order polynomial interpolation is used. (c) 2005 IMACS. Published by Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0168-9274 UR - ISI:000231331200002 L2 - anisotropic triangulations;adaptive mesh refinement;polynomial interpolation;local error estimate;jump discontinuities;REFINEMENT SO - Applied Numerical Mathematics 2005 ;55(2):137-153 12943 UI - 2477 AU - Aguilar JC AU - Chen Y AD - Intituto Tecnol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, MexicoNYU, Courant Inst Math Sci, New York, NY 10012, USAAguilar, JC, Intituto Tecnol Autonomo Mexico, Dept Matemat, Mexico City 01000, DF, Mexico TI - High-order corrected trapezoidal quadrature rules for the Coulomb potential in three dimensions AB - We construct correction coefficients for high-order trapezoidal quadrature rules to evaluate three-dimensional singular integrals of the form, J(v) = integral(D) v(x, y, z)/root x(2) +y(2) + z(2) dx dy dz, where the domain D is a cube containing the point of singularity (0, 0, 0) and v is a C-infinity function defined on R-3. The procedure employed here is a generalization to 3-D of the method of central corrections for logarithmic singularities [1] in one dimension, and [2] in two dimensions. As in one and two dimensions, the correction coefficients for high-order trapezoidal rules for J(v) are independent of the number of sampling points used to discretize the cube D. When v is compactly supported in D, the approximation is the trapezoidal rule plus a local weighted sum of the values of v around the point of singularity. These quadrature rules provide an efficient, stable and accurate way of approximating J(v). We demonstrate the performance of these quadratures of orders up to 17 for highly oscillatory functions v. These type of integrals appear in scattering calculations in 3-D. (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Interdisciplinary Applications;Mathematics, Applied U5 - J;Article AV - English IS - 0898-1221 UR - ISI:000227693800011 L2 - quadratures;Coulomb potential;trapezoidal rule;correction coefficients;boundary corrections;SINGULAR FUNCTIONS SO - Computers & Mathematics with Applications 2005 ;49(4):625-631 12944 UI - 1474 AU - Aguilar JEM AU - Bellini M AD - Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Mar del Plata, Fac Ciencias Exactas & Nat, Dept Fis, RA-7600 Mar Del Plata, ArgentinaConsejo Nacl Ciencia & Tecnol CONICET, RA-7600 Mar Del Plata, ArgentinaAguilar, JEM, Univ Michoacana, Inst Fis & Matemat, AP 2-82, Morelia 58040, Michoacan, Mexico TI - Extra force and extra mass from non-compact Kaluza-Klein theory in a cosmological model AB - Using the Hamilton-Jacobi formalism, we study extra force and extra mass in a recently introduced non-compact Kaluza-Klein cosmological model. We examine the inertial 4D mass m(0) of the inflaton field on a 4D FRW bulk in two examples. We find that m(0) has a geometrical origin and antigravitational effects on a non-inertial 4D bulk should be a consequence of the motion of the fifth coordinate with respect to the 4D bulk MH - Argentina MH - Mexico|Michoacan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000231123900010 L2 - 5TH FORCE; INFLATIONARY COSMOLOGY; BRANE-WORLD; REST MASS; DIMENSION; GRAVITY; MILLIMETER; HIERARCHY; GEODESICS; CONSTANT SO - European Physical Journal C 2005 ;42(3):349-354 12945 UI - 1744 AU - Aguilar JEM AU - Bellini M AD - Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoUniv Mar del Plata, Fac Ciencias Exactas & Nat, Dept Fis, RA-7600 Mar Del Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-7600 Mar Del Plata, ArgentinaAguilar, JEM, Univ Michoacana, Inst Fis & Matemat, AP 2-82, Morelia 58040, Michoacan, Mexico TI - Noncompact KK theory of gravity: Stochastic treatment for a nonperturbative inflaton field in a de Sitter expansion AB - We study a stochastic formalism for a nonperturbative treatment of the inflaton field in the framework of a noncompact Kaluza-Klein (KK) theory during an inflationary (de Sitter) expansion, without the slow-roll approximation. (c) 2005 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000230373400003 L2 - KALUZA-KLEIN-THEORY; MODELS; FORMALISM; UNIVERSE SO - Physics Letters B 2005 ;619(3-4):208-218 12946 UI - 1422 AU - Aguilar MB AU - Lopez-Vera E AU - Ortiz E AU - Becerril B AU - Possani LD AU - Olivera BM AU - de la Cotera EPH AD - UNAM, UAQ, Inst Neurobiol, Lab B01,Lab Marine Neuropharmacol, Juriquilla 76230, Qro, MexicoUniv Utah, Dept Biol, Salt Lake City, UT 84112, USAUniv Nacl Autonoma Mexico, Inst Biotechnol, Dept Mol Med & Bioproc, Inst Biotechnol, Cuernavaca 62210, Morelos, MexicoAguilar, MB, UNAM, UAQ, Inst Neurobiol, Lab B01,Lab Marine Neuropharmacol, Km 15 Carr, Juriquilla 76230, Qro, Mexico TI - A novel conotoxin from Conus delessertii with posttranslationally modified lysine residues AB - A major peptide, del 3a from the crude venom of Conus delessertii collected in the Yucatan Channel, Mexico, was purified. The peptide had a high content of posttranslationally modified amino acids, including 6-bromotryptophan and a nonstandard amino acid that proved to be 5-hydroxylysine. This is the first report of 5-hydroxylysine residues in conotoxins. The sequence analysis, together with cDNA cloning and a mass determination (monoisotopic mass of 3486.76 Da), established that the mature toxin has the sequence DCOTSCOTTCANGWECCKGYOCVNKACSGCTH*, where O is 4-hydroxyproline, W 6-bromotryptophan, and K 5-hydroxylysine, the asterisk represents the amidated C-terminus, and the calculated monoisotopic mass is 3487.09 Da. The eight Cys residues are arranged in a pattern (C-C-C-CC-C-C-C) not described previously in conotoxins. This arrangement, for which we propose the designation of framework #13 or XIII, differs from the ones (C-C-CC-CC-C-C and C-C-C-C-CC-C-C) present in other conotoxins which also contain eight Cys residues. This peptide thus defines a novel class of conotoxins, with a new posttranslational modification not previously found in other Conus peptide families MH - Mexico|Morelos MH - Mexico|Queretaro MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0006-2960 UR - ISI:000231274800022 L2 - CYSTEINE PATTERN; VENOM PEPTIDES; ION-CHANNEL; PROTEIN; IDENTIFICATION; HYDROXYLYSINE; HYDROXYLATION; SUPERFAMILY; BROMINATION; TRYPTOPHAN SO - Biochemistry 2005 ;44(33):11130-11136 12947 UI - 3347 AU - Aguilar MB AU - Lopez-Vera E AU - Imperial JS AU - Falcon A AU - Olivera BA AU - de la Cotera EPH AD - Univ Nacl Autonoma Mexico, Lab Marine Neuropharmacol, Inst Neurobiol, Juriquilla 76230, Qro, MexicoUniv Utah, Dept Biol, Salt Lake City, UT 84112, USAAguilar, MB, Univ Nacl Autonoma Mexico, Lab Marine Neuropharmacol, Inst Neurobiol, Juriquilla 76230, Qro, Mexico TI - Putative gamma-conotoxins in vermivorous cone snails: the case of Conus delessertii AB - Peptide de7a was purified from the venom of Conus delessertii, a vermivorous cone snail collected in the Yucatan Channel, Mexico. Its amino acid sequence was determined by automatic Edman degradation after reduction and alkylation. The sequence shows six Cys residues arranged in the pattern that defines the O-superfamily of conotoxins, and several post-translationally modified residues. The determination of its molecular mass by means of laser desorption ionization time-of-flight mass spectrometry (average mass, 3170.0 Da) confirmed the chemical data and suggested amidation of the C-terminus. The primary structure (ACKOKNNLCAITgammaMAgammaCCSGFCLIYRCS*; O, hydroxyproline; gamma, gamma-carboxyglutamate; *, amidated C-terminus; calculated average mass, 3169.66 Da) of de7a contains a motif (-gammaCCS-) that has previously only been found in two other toxins, both from molluscivorous cone snails: TxVIIA from Conus textile and gamma-PnVIIA from Conus pennaceus. These toxins cause depolarization and increased firing of action potentials in molluscan neuronal systems, and toxin gamma-PnVIIA has been shown to act as an agonist of neuronal pacemaker cation currents. The similarities to toxins TxVIIA and gamma-PnVIIA suggest that peptide de7a might also affect voltage-gated nonspecific cation pacemaker channels. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Queretaro MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0196-9781 UR - ISI:000226458700005 L2 - conacea;conidae;cone snail;Conus delessertii;gamma-conotoxin;pacemaker channels;PEPTIDES; VENOM; TEXTILE SO - Peptides 2005 ;26(1):23-27 12948 UI - 812 AU - Aguilar ME AU - Crozat P AU - Hackbarth T AU - Herzog HJ AU - Aniel F AD - Inst Politecn Nacl, ESIME, SEPI, Mexico City 07738, DF, MexicoUniv Paris 11, Inst Elect Fondamentale, F-91405 Orsay, FranceDaimler Chrysler Res Ctr, D-89081 Ulm, GermanyAguilar, ME, Inst Politecn Nacl, ESIME, SEPI, Mexico City 07738, DF, Mexico TI - Microwave, noise performance and modeling of SiGe-based HFETs AB - Microwave noise performance of SiGe-based heterostructure field effect transistors (HFETs) is presented. Noise parameters for devices with buried channel fabricated on several virtual substrates are discussed. The impact of such strain relieved buffers on device noise performance is estimated by a proper noise de-embedding technique. Then, the noise properties measured in the 2.5-18-GHz frequency range are compared with those of other technologies. Noise parameters of SiGe HFETs are simulated using Pospieszalskis and Van Der Ziells noise models. Some detrimental effects like access resistances and self-heating effects that negatively impact the microwave noise behavior are discussed and some alternatives to overwhelm them are proposed MH - France MH - Germany MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9383 UR - ISI:000232898200008 L2 - computer-aided design (CAD);heterostructure field-effect transistors (HFETs);microwave noise;noise modeling;noise parameters;SiGe;strained-silicon;virtual substrate (VS);CHEMICAL-VAPOR-DEPOSITION; FIELD-EFFECT TRANSISTORS; N-MODFETS; FREQUENCY; DEPENDENCE; SUBSTRATE; PARAMETER; MOSFETS; IMPACT; FIGURE SO - Ieee Transactions on Electron Devices 2005 ;52(11):2409-2415 12949 UI - 2663 AU - Aguirre J AU - Rios-Momberg M AU - Hewitt D AU - Hansberg W AD - Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Bioquim, Mexico City 04510, DF, MexicoHarvard Univ, Farlow Herbarium, Cambridge, MA 02138, USAAguirre, J, Natl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Apartado Postal 70-242, Mexico City 04510, DF, Mexico TI - Reactive oxygen species and development in microbial eukaryotes AB - Reactive oxygen species (ROS) have been regarded as inevitable harmful by-products of aerobic metabolism. Growing evidence, however, suggests that ROS play important physiological roles. This raises questions about the pathways that different groups of organisms use to produce and sense ROS. In microbial eukaryotes, recent data show (i) increased ROS levels during cell differentiation, (ii) the existence of ROS-producing enzymes, such as NADPH oxidases (NOX), (iii) the involvement of NOX in developmental processes, and (iv) a conservation in the signal-transduction mechanisms used to detect ROS. This shows that manipulation of reactive species, as strategy to regulate cell differentiation, is ubiquitous in eukaryotes and suggests that such strategy was selected early in evolution MH - Mexico|Distrito Federal MH - USA PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 47 U4 - Biochemistry & Molecular Biology;Microbiology U5 - J;Review AV - English IS - 0966-842X UR - ISI:000227932800007 L2 - ACTIVATED PROTEIN-KINASE; NITRIC-OXIDE SYNTHASE; NADPH OXIDASE; ASPERGILLUS-NIDULANS; NEUROSPORA-CRASSA; OXIDATIVE STRESS; SUPEROXIDE-DISMUTASE; SACCHAROMYCES-CEREVISIAE; CELL-DIFFERENTIATION; SEXUAL DEVELOPMENT SO - Trends in Microbiology 2005 ;13(3):111-118 12950 UI - 917 AU - Aichholzer O AU - Bremner D AU - Demaine ED AU - Hurtado F AU - Kranakis E AU - Krasser H AU - Ramaswami S AU - Sethia S AU - Urrutia J AD - MIT, Comp Sci & Artificial Intelligence Lab, Cambridge, MA 02139, USAGraz Univ Technol, Inst Software Technol, A-8010 Graz, AustriaUniv New Brunswick, Fac Comp Sci, Fredericton, NB E3B 5A3, CanadaUniv Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, SpainCarleton Univ, Sch Comp Sci, Ottawa, ON K1S 5B6, CanadaGraz Univ Technol, Inst Theoret Comp Sci, A-8010 Graz, AustriaRutgers State Univ, Dept Comp Sci, Piscataway, NJ 08855, USAOregon State Univ, Dept Comp Sci, Corvallis, OR 97331, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoDemaine, ED, MIT, Comp Sci & Artificial Intelligence Lab, Cambridge, MA 02139 USA TI - Games on triangulations AB - We analyze several perfect-information combinatorial games played on planar triangulations, We introduce three broad categories of such game-constructing. transforming, and marking triangulations-and several specific games within each category. In various situations of each game, we develop polynomial-time algorithms to determine who wins a given game position under optimal play, and to find a winning strategy. Along the way, we show connections to existing combinalorial games such as Kayles and Nimstring (a variation on Dots-and-Boxes), (c) 2005 Published by Elsevier B.V MH - USA MH - Austria MH - Canada MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0304-3975 UR - ISI:000232443900004 L2 - combinatorial games;planar triangulations;algorithms;geometry SO - Theoretical Computer Science 2005 ;343(1-2):42-71 12951 UI - 3127 AU - Aizpuru A AU - Dunat B AU - Christen P AU - Auria R AU - Garcia-Pena I AU - Revah S AD - Univ Autonoma Metropolitana Iztapalapa, Proc Engn Dept, Mexico City 09340, DF, MexicoUniv Pau & Pays Adour, F-65000 Tarbes, FranceUniv Autonoma Metropolitana Iztapalapa, Inst Rech Dev France, Mexico City 09340, DF, MexicoUniv Aix Marseille 1, CESB, ESIL, Inst Rech Dev,Lab IRD Microbiol, F-13288 Marseille 9, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Chem Engn, Mexico City 09340, DF, MexicoRevah, S, Univ Autonoma Metropolitana Iztapalapa, Proc Engn Dept, Apdo Postal 55-534, Mexico City 09340, DF, Mexico TI - Fungal biofiltration of toluene on ceramic rings AB - Fungal biofilters attain higher toluene elimination. rates compared to bacterial systems. However, strong mycelia growth can cause clogging. In the present work, toluene biofiltration with the fungus Paecilomyces variotii CBS 115145 was tested with two rigid packing materials that allow high mycelia growth. The reactor had two 4.25 L sections, each packed with ceramic Raschig rings differing in water retention capacity and internal porosity. After optimizing nutrient solution delivery, an overall maximum elimination capacity of 245 g/m(3)/h was obtained. Higher elimination capacity (290 g/m(3)/h) was measured in the ceramic ring with lower water content, indicating the interest of such packing material for treating hydrophobic pollutants in fungal biofilters. Additional experiments with this support in a 2 L biofilter showed bacterial contamination, but the fungal activity was responsible for about 70% of the total removal. The support with less humidity showed greater aerial growth, which possibly improves removal efficiency by favoring the direct transfer of pollutants from the gas phase to the microorganism MH - France MH - Mexico|Distrito Federal PB - RESTON: ASCE-AMER SOC CIVIL ENGINEERS RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Environmental;Engineering, Civil;Environmental Sciences U5 - J;Article AV - English IS - 0733-9372 UR - ISI:000227101200008 L2 - BIOFILTER; REMOVAL; AIR; VAPORS; GROWTH; DESIGN; XYLENE SO - Journal of Environmental Engineering-Asce 2005 ;131(3):396-402 12952 UI - 1191 AU - Ajani JA AU - Takimoto C AU - Becerra CR AU - Silva A AU - Baez L AU - Cohn A AU - Major P AU - Kamida M AU - Feit K AU - De Jager R AD - Univ Texas, MD Anderson Canc Ctr, Houston, TX 77030, USACanc Therapy & Res Ctr S Texas, San Antonio, TX 78229, USAUniv Texas, SW Med Ctr, Dallas, TX, USAHosp Oncol Cent Med Nacl Siglo XXI, Mexico City, DF, MexicoVA Med Ctr & Hosp, San Juan, PR, USARocky Mt Canc Ctr, Denver, CO, USAHamilton Reg Canc Ctr, Hamilton, ON L8V 1C3, CanadaDaiichi Pharmaceut Corp, Montvale, NJ, USAAjani, JA, Univ Texas, MD Anderson Canc Ctr, 1515 Holcombe Blvd,Box 426, Houston, TX 77030 USA TI - A phase II clinical and pharmacokinetic study of intravenous exatecan mesylate (DX-8951f) in patients with untreated metastatic gastric cancer AB - Purpose: To determine the anti-tumor activity DX-8951f when administered as a 30-minute infusion daily for 5 days every 3 weeks to patients with previously untreated metastatic gastric cancer, and to evaluate toxicities and pharmacokinetics (PK) of DX-8951f in this patient population. Patients and methods: Forty-one patients were enrolled. All had previously untreated metastatic gastric cancer. DX-8951f was administered until disease progression or unacceptable toxicity. Responses were assessed after every 2 courses using RECIST criteria. Results: Thirty-nine patients were evaluable. Two patients achieved a partial response (PR) and 18 achieved stable disease (SD), including five patients with unconfirmed PR. A total of 141 courses of therapy were delivered (median 3, range 1-10). The most common drug-related toxicity was neutropenia. Non-hematologic toxicities were mostly mild to moderate; the most common were nausea, vomiting and anorexia. Plasma concentrations of DX-8951 (the anhydrous form of DX-8951f) were well described using a linear 2-compartment PK model. All concentrations and dose events were simultaneously modeled and explained by the population PK model. There was no evidence of non-linearity in the elimination PK, auto-inhibition or induction of DX-8951 clearance over the five days of administration. Conclusions: DX-8951f had modest activity against metastatic gastric cancer and its PK was dose-proportional. The toxicity profile was predictable and manageable. Further development of this agent is warranted MH - Canada MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Oncology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0167-6997 UR - ISI:000231245000009 L2 - exatecan mesylate;DX-8951f;camptothecin;topoisomerase I;gastric cancer;POTENT ANTITUMOR-ACTIVITY; CAMPTOTHECIN ANALOG; TOPOISOMERASE-I; HUMAN PLASMA; TUMOR-CELLS; NUDE-MICE; VITRO SO - Investigational New Drugs 2005 ;23(5):479-484 12953 UI - 1569 AU - Akguc GB AU - Flores J AU - Kun SY AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, MexicoAustralian Natl Univ, Ctr Nonlinear Phys, RSPhysSE, Canberra, ACT 0200, AustraliaAustralian Natl Univ, Dept Theoret Phys, RSPhysSE, Canberra, ACT 0200, AustraliaAkguc, GB, Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62191, Morelos, Mexico TI - Effective S matrix from conductance data in a quantum waveguide AB - We consider two different stationary random processes whose probability distributions are very close and indistinguishable by standard tests for large but limited statistics. Yet we demonstrate that these processes can be reliably distinguished. The method is applied to analyze conductance fluctuations in coherent electron transport through nanostructures MH - Australia MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000230890200021 L2 - STATISTICAL NUCLEAR-REACTIONS; INFORMATION-THEORY; TRANSPORT; DOTS SO - Physical Review B 2005 ;72(3): 12954 UI - 2413 AU - Akiyama J AU - Hirata K AU - Ruiz MJP AU - Urrutia J AD - Tokai Univ, Res Inst Educ Dev, Shibuya Ku, Tokyo 1518677, Japan. Ehime Univ, Fac Educ, Dept Math, Matsuyama, Ehime 7908577, Japan. Ateneo Manila Univ, Sch Sci & Engn, Dept Math, Quezon City, Philippines. Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - Flat 2-foldings of convex polygons AB - A folding of a simple polygon into a convex polyhedron is accomplished by glueing portions of the perimeter of the polygon together to form a polyhedron. A polygon Q is a flat re-folding of a polygon P if P can be folded to exactly cover the surface of Q n times, with no part of the surface of P left over. In this paper we focus on a specific type of flat 2-foldings, flat 2-foldings that wrap Q; that is, foldings of P that cover both sides of Q exactly once. We determine, for any n, all the possible flat 2-foldings of a regular n-gon. We finish our paper studying the set of polygons that are flat 2-foldable to regular polygons MH - Japan MH - Mexico|Distrito Federal MH - Philippines T3 - COMBINATORIAL GEOMETRY AND GRAPH THEORYLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlefwjb5117@mb.infoweb.ne.jp hirata@ed.ehime-u.ac.jp mruiz@ateneo.edu urrutia@math.unam.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBCB79 AV - English IS - 0302-9743 UR - ISI:000228546700002 SO - 2005 ;():14-24 12955 UI - 779 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Astvatsatourov A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Bizot JC AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Cerny V AU - Chekelian V AU - Contreras JG AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - de Boer Y AU - Delcourt B AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dodonov V AU - Dubak A AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmannn W AU - Essenov S AU - Falkewicz A AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Formenko A AU - Foresti I AU - Franke G AU - Frisson T AU - Gabathuler E AU - Garutti E AU - Gayler J AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Greenshaw T AU - Gregori M AU - Grell BR AU - Grinedhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Hildebrandt M AU - Hiller KH AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Hreus T AU - Ibbotson A AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung AW AU - Jung H AU - Kapichine M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Krastev K AU - Kretzschmar J AU - Kropivnitskaya A AU - Kruger K AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Lastovicka-Medin G AU - Laycock P AU - Lebedev A AU - Leibenguth G AU - Leissner B AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - Liptaj A AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lucaci-Timoce AI AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mladenov D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nankov K AU - Naroska B AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Osman S AU - Ozerov D AU - Palichik V AU - Panagoulias I AU - Papadopoulou T AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Schilling EP AU - Schmidt S AU - Schmitt S AU - Schmitz C AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Sedlak K AU - Sefkow E AU - Shaw-West RN AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Stella B AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandUniv Libre Bruxelles, Vrije Univ Brussel, Inter Univ Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Chilton, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, FranceUniv Hamburg, Inst Phys Expt, Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Heidelberg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, IN2P3, CNRS, LLR, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, Paris, FranceUniv Montenegro, Fac Sci, Podgorica, Serbia MontenegAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, BulgariaPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Fachbereich C, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Phys Inst, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceUniv Wuppertal, Rechenzentrum, Wuppertal, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyComenius Univ, Bratislava, SlovakiaAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Search for leptoquark bosons in ep collisions at HERA AB - A search for scalar and vector leptoquarks coupling to first generation fermions is performed using the e(+) p and e(-) p scattering data collected by the H1 experiment between 1994 and 2000. The data correspond to a total integrated luminosity of 117 pb(-1). No evidence for the direct or indirect production of such particles is found in data samples with a large transverse momentum final state electron or with large missing transverse momentum. Constraints on leptoquark models are established. For leptoquark couplings of electromagnetic strength, leptoquarks with masses up to 275-325 GeV are ruled out at 95% confidence level. These limits improve and supercede earlier H1 limits based on subsamples of the data used here. (c) 2005 Elsevier B.V. All rights reserved MH - Armenia MH - Belgium MH - Bulgaria MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Serbia Monteneg MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000232958000002 L2 - CURRENT CROSS-SECTIONS; E6 SCALAR LEPTOQUARKS; QCD ANALYSIS; COLLIDERS; CALORIMETER; PHYSICS; MODELS; COLOR SO - Physics Letters B 2005 ;629(1):9-19 12956 UI - 1207 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Astvatsatourov A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Bizot JC AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Cerny V AU - Chekelian V AU - Contreras JG AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - de Boer Y AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dodonov V AU - Dubak A AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Essenov S AU - Falkewicz A AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Fomenko A AU - Foresti I AU - Franke G AU - Frisson T AU - Gabathuler E AU - Garutti E AU - Gayler J AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Greenshaw T AU - Gregori M AU - Grell BR AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Hildebrandt M AU - Hiller KH AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kapichine M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Koutouev R AU - Krastev K AU - Kretzschmar J AU - Kropivnitskaya A AU - Kruger K AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Lastovicka-Medin G AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lucaci-Timoce AI AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mladenov D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nankov K AU - Naroska B AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Osman S AU - Ozerov D AU - Palichik V AU - Panagoulias I AU - Papadopoulou T AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Schilling FP AU - Schmidt S AU - Schmitt S AU - Schmitz C AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Stella B AU - Stiewe J AU - Strauch I AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandInteruniv Inst High Energies ULB VUB, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCtr Etud Saclay, CEA, DSM, DAPNIA, F-91191 Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, IN2P3, CNRS, LAL, Orsay, FranceEcole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceUniv Montenegro, Fac Sci, Podgorica, Serbia MontenegAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, BulgariaPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Fachbereich C, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceUniv Wuppertal, Rech Zentrum, Wuppertal, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyComenius Univ, Bratislava, SlovakiaAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Measurement of deeply virtual Compton scattering at HERA AB - A measurement is presented of elastic deeply virtual Compton scattering gamma* p -> gamma p made using e(+) p collision data corresponding to a luminosity of 46.5 pb(-1), taken with the H1 detector at HERA. The cross section is measured as a function of the photon virtuality, Q(2), the invariant mass of the gamma* p system, W, and for the first time, differentially in the squared momentum transfer at the proton vertex, t, in the kinematic range 2 < Q(2) < 80 GeV2, 30 < W < 140 GeV and vertical bar t vertical bar < 1 GeV2. QCD based calculations at next-to-leading order using generalized parton distributions can describe the data, as can colour dipole model predictions MH - Armenia MH - Belgium MH - Bulgaria MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Serbia Monteneg MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 23 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000231950000001 L2 - TO-LEADING ORDER; PARTON DISTRIBUTIONS; INELASTIC SCATTERING; EVOLUTION-EQUATIONS; J/PSI MESONS; QCD; ELECTROPRODUCTION; CALORIMETER; NUCLEON SO - European Physical Journal C 2005 ;44(1):1-11 12957 UI - 1445 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Astvatsatourov A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Bizot JC AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Cerny V AU - Chekelian V AU - Contreras JG AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dodonov V AU - Dubak A AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Essenov S AU - Falkewicz A AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Frisson T AU - Gabathuler E AU - Garutti E AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Hildebrandt M AU - Hiller KH AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Koutouev R AU - Krastev K AU - Kretzschmar J AU - Kropivnitskaya A AU - Kruger K AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lucaci-Timoce AI AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau R AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Osman S AU - Ozerov D AU - Palichik V AU - Papadopoulou T AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Schilling FP AU - Schmidt S AU - Schmitt S AU - Schmitz C AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Stella B AU - Stiewe J AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandUniv Antwerp, B-2020 Antwerp, BelgiumULB VUB, Inter Univ Inst High Energies, Brussels, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCEA, CE Saclay, DSM, DAPNIA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angewandte Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, FranceEcole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceUniv Montenegro, Fac Sci, Podgorica, Serbia MontenegAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyInst Nucl Energy Res, Sofia, BulgariaPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Fachbereich C, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceUniv Wuppertal, Rechenzentrum, Wuppertal, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyComenius Univ, Bratislava, SlovakiaAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Measurement of charm and beauty photoproduction at HERA using D*mu correlations AB - A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D*(+/-) meson and a muon. The correlation between the D* meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher. (c) 2005 Elsevier B.V. All rights reserved MH - Armenia MH - Belgium MH - Bulgaria MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Serbia Monteneg MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000231105400007 L2 - DEEP-INELASTIC-SCATTERING; CARLO GENERATOR CASCADE; HEAVY FLAVOR PRODUCTION; CROSS-SECTIONS; PARTON DISTRIBUTIONS; E&E ANNIHILATION; D-ASTERISK(+/-); QCD; CALORIMETER; COLLISIONS SO - Physics Letters B 2005 ;621(1-2):56-71 12958 UI - 1470 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Essenov S AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Frisson T AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kruger KK AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schmidt S AU - Schmitt S AU - Schmitz C AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AD - Rhein Westfal TH Aachen, Inst Phys 1, Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandUniv Inst High Energies, VUB, ULB, Brussels, BelgiumUniv Antwerp, Antwerp, BelgiumRutherford Appleton Lab, Didcot, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DAPNIA, DSM, Gif Sur Yvette, FranceDESY, Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angewandte Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceCNRS, Ecole Polytech, LLR, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandAktas, A, Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany TI - Measurement of F-2(c(c)over-bar) and F-2(b(b)over-bar) at high Q(2) using the H1 vertex detector at HERA AB - Measurements are presented of inclusive charm and beauty cross sections in e(+)p collisions at HERA for values of photon virtuality Q(2) > 150 GeV2 and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q(2) and Bjorken x, and values for the structure functions F-2(c (c) over bar) and F-2(b (b) over bar) are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 21 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000231122700005 L2 - DEEP-INELASTIC SCATTERING; FLAVOR STRUCTURE FUNCTIONS; INITIAL-STATE RADIATION; CURRENT CROSS-SECTIONS; P(P)OVER-BAR COLLISIONS; PARTON DISTRIBUTIONS; CHARGED CURRENT; BEAUTY PRODUCTION; ROOT-S=1.8 TEV; D-ASTERISK(+/-) PRODUCTION SO - European Physical Journal C 2005 ;40(3):349-359 12959 UI - 1471 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Bizot JC AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Contreras JG AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dodonov V AU - Dubak A AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Essenov S AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Frisson T AU - Gabathuler E AU - Garutti E AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Koutouev R AU - Krastev K AU - Kretzschmar J AU - Kropivnitskaya A AU - Kruger K AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lucaci-Timoce AI AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Osman S AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schmidt S AU - Schmitt S AU - Schmitz C AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Stella B AU - Stiewe J AU - Strauch I AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandVrije Univ Brussels, ULB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, IN2P3, CNRS, LLR, Palaiseau, FranceUniv Paris 06, LPNHE, Paris, FranceUniv Paris 07, IN2P3, CNRS, Paris, FranceUniv Montenegro, Fac Sci, Podgorica, Serbia MontenegAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Rome Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl Rome 3, Rome, ItalyBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, BulgariaPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Facbereich C, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceUniv Wuppertal, Rechenzentrum, Wuppertal, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAktas, A, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - A direct search for stable magnetic monopoles produced in positron-proton collisions at HERA AB - A direct search has been made for magnetic monopoles produced in e(+)p collisions at a centre of mass energy of 300 GeV at HERA. The beam pipe surrounding the interaction region in 1995-1997 was investigated using a SQUID magnetometer to look for stopped magnetic monopoles. During this time an integrated luminosity of 62 pb(-1) was delivered. No magnetic monopoles were observed and charge and mass dependent upper limits on the e(+)p production cross section are set MH - Armenia MH - Belgium MH - Bulgaria MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Serbia Monteneg MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 4 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000231123400001 L2 - HIGHLY IONIZING PARTICLES; KALUZA-KLEIN MONOPOLE; QUANTUM FIELD-THEORY; GRAND UNIFICATION; GAUGE-THEORIES; PARITY RESTORATION; E+E ANNIHILATIONS; STOPPING-POWER; LUNAR MATERIAL; LOW ENERGIES SO - European Physical Journal C 2005 ;41(2):133-141 12960 UI - 1472 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Bizot JC AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Contreras JG AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - DeRoeck A AU - Desch K AU - Dewolf EA AU - Diaconu C AU - Dodonov V AU - Dubak A AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Essenov S AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Fomenko A AU - Foresti I AU - Formanek A AU - Franke G AU - Frising G AU - Frisson T AU - Gabathuler E AU - Garutti E AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Koutouev R AU - Krastev K AU - Kretzschmar J AU - Kropivnitskaya A AU - Kruger KK AU - Kuckens JK AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lucaci-Timoce AI AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Osman S AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schmidt S AU - Schmitz C AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Stella B AU - Stiewe J AU - Strauch I AU - Straumann U AU - Tchoulakov V AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandVrije Univ Brussels, ULB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Chilton, EnglandInst Phys Nucl, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Nucl Res Inst, Dubna, RussiaCEA Saclay, DSM DAPNIA, F-91191 Gif Sur Yvette, FranceDESY, D-2000 Hamburg, GermanyUniv Hamburg, Inst Phys Expt, Hamburg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, Orsay, FranceEcole Polytech, LLR, CNRS, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, Paris, FranceUniv Paris 07, LPNHE, CNRS, Paris, FranceUniv Montenegro, Fac Sci, Podgorica, Serbia MontenegAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFM Roma 3, Rome, ItalyInst Nucl Energy Res, Sofia, BulgariaPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandAktas, A, Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany TI - Measurement of dijet cross sections in ep interactions with a leading neutron at HERA AB - Measurements are reported of the production of dijet events with a leading neutron in ep interactions at HERA. Differential cross sections for photoproduction and deep inelastic scattering are presented as a function of several kinematic variables. Leading order QCD simulation programs are compared with the measurements. Models in which the real or virtual photon interacts with a parton of an exchanged pion are able to describe the data. Next-to-leading order perturbative QCD calculations based on pion exchange are found to be in good agreement with the measured cross sections. The fraction of leading neutron dijet events with respect to all dijet events is also determined. The dijet events with a leading neutron have a lower fraction of resolved photon processes than do the inclusive dijet data MH - Armenia MH - Belgium MH - Bulgaria MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Serbia Monteneg MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 7 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000231123500001 L2 - MONTE-CARLO GENERATOR; PARTON DISTRIBUTIONS; NUCLEON SCATTERING; PROTON COLLISIONS; VIRTUAL PHOTON; RAPIDITY GAPS; ENERGY; DIS; FRAGMENTATION; CALORIMETER SO - European Physical Journal C 2005 ;41(3):273-286 12961 UI - 1473 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Aplin S AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baghdasaryan A AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baudrand S AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Bizot JC AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brandt G AU - Brisson V AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunnner F AU - Cerny K AU - Cerny V AU - Chekelian V AU - Contreras JG AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - de Boer Y AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dodonov V AU - Dubak A AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Essenov S AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Finke L AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Frisson T AU - Gabathuler E AU - Garutti E AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Glazov A AU - Glushkov I AU - Goerlich L AU - Goettlich M AU - Gogitidze N AU - Gorbounov S AU - Goyon C AU - Grab C AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Hildebrandt M AU - Hiller KH AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Korbel V AU - Kostka P AU - Koutouev R AU - Krastev K AU - Kretzschmar J AU - Kropivnitskaya A AU - Kroseberg J AU - Kruger K AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lucaci-Timoce AI AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Osman S AU - Ozerov D AU - Palichik V AU - Papadopoulou T AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perez-Astudillo D AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Portheault B AU - Povh B AU - Prideaux P AU - Raicevic N AU - Reimer P AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Salvaire F AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Schilling FP AU - Schmidt S AU - Schmitt S AU - Schmitz C AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AU - Stella B AD - Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandULB VUB, Inter Univ Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, CE Saclay, DSM, DAPNIA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angeeandte Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, CPPM, IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, IN2P3, CNRS, Orsay, FranceEcole Polytech, CNRS, LLR, IN2P3, F-91128 Palaiseau, FranceUniv Paris 06, LPNHE, IN2P3, CNRS, Paris, FranceUniv Paris 07, LPNHE, IN2P3, CNRS, Paris, FranceUniv Montenegro, Fac Sci, Podgorica, Serbia MontenegAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyInst Nucl Energy Res, Sofia, BulgariaPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Fachbereich C, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Zografos, GreeceUniv Wuppertal, Rechenzentrum, Wuppertal, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Measurement of beauty production at HERA using events with muons and jets AB - A measurement of the beauty production cross section in ep collisions at a centre-of-mass energy of 319 GeV is presented. The data were collected with the H1 detector at the HERA collider in the years 1999-2000. Events are selected by requiring the presence of jets and muons in the final state. Both the long lifetime and the large mass of b-flavoured hadrons are exploited to identify events containing beauty quarks. Differential cross sections are measured in photoproduction, with photon virtualities Q(2) < 1 GeV2, and in deep inelastic scattering, where 2 < Q(2) < 100 GeV2. The results are compared with perturbative QCD calculations to leading and next-to-leading order. The predictions are found to be somewhat lower than the data MH - Armenia MH - Belgium MH - Bulgaria MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Serbia Monteneg MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 17 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000231123600002 L2 - MONTE-CARLO GENERATOR; DEEP-INELASTIC SCATTERING; INITIAL-STATE RADIATION; EP COLLISIONS; P(P)OVER-BAR COLLISIONS; CROSS-SECTIONS; PARTON DISTRIBUTIONS; ROOT-S=1.8 TEV; SMALL-X; HADRON-COLLISIONS SO - European Physical Journal C 2005 ;41(4):453-467 12962 UI - 2027 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming Y AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Ginzburgskaya S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kruger K AU - Kuckens J AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Nankov K AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ozerov D AU - Paramonov A AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling RP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AU - Smirnov P AU - Soloviev Y AU - South D AU - Spaskov V AU - Specka A AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 2, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, EnglandVrije Univ Brussels, Interuniv Int High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCEA, DSM, DAPNIA, CE Saclay, F-91191 Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, D-6900 Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, S-22362 Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CNRS, IN2P3, CPPM, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, FranceEcole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, FranceUniv Paris 06, CNRS, IN2P3, LPNHE, Paris, FranceUniv Paris 07, CNRS, IN2P3, LPNHE, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyIst Nazl Fis Nucl, Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandUniv Wuppertal, Fachbereich C, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceUniv Wuppertal, Rech Zentrum, Wuppertal, GermanySafarik Univ, Kosice, SlovakiaCERN, CH-1211 Geneva, SwitzerlandAktas, A, DESY, D-2000 Hamburg, Germany TI - Search for light gravitinos in events with photons and missing transverse momentum at HERA AB - A search for gravitinos produced in e(+/-)p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb(-1) for e(+)p collisions and 13.5 pb(-1) for e(-)p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings lambda' equal to 1, in some parts of the parameter space of the considered model. (c) 2005 Elsevier B.V. All rights reserved MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000229653800005 L2 - DOUBLE-BETA-DECAY; PARITY VIOLATING SUPERSYMMETRY; LIQUID ARGON CALORIMETER; E(+)E(-) COLLISIONS; R-PARITY; BOSON PRODUCTION; CROSS-SECTIONS; SINGLE-PHOTON; DARK-MATTER; ENERGY SO - Physics Letters B 2005 ;616(1-2):31-42 12963 UI - 3467 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hladky J AU - Hoting P AU - Hoffmann D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Jonsson L AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens J AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson E AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Ratiani Z AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AU - Shtarkov LN AU - Sirois Y AU - Sloan T AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, DAPNIA, DSM, CEA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LLR, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, D-42097 Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Measurement of prompt photon cross sections in photoproduction at HERA AB - Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gammap center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E. T < 10 GeV and for associated jets with E-T(jet) > 4.5 GeV. They are measured differentially as a function of E-T(gamma), E-T(jet), the pseudorapidities eta(gamma) and eta(jet) and estimators of the momentum fractions x(gamma) and x(p) of the incident photon and proton carried by the constituents participating in the hard process. In order to further investigate the underlying dynamics, the angular correlation between the prompt photon and the jet in the transverse plane is studied. Predictions by perturbative QCD calculations in next to leading order are about 30% below the inclusive prompt photon data after corrections for hadronisation and multiple interactions, but are in reasonable agreement with the results for prompt photons associated with jets. Comparisons with the predictions of the event generators PYTHIA and HERWIG are also presented MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 10 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000226120100004 L2 - PHYSICS EVENT GENERATION; PLUS JET PHOTOPRODUCTION; TO-LEADING-ORDER; PARTON DISTRIBUTIONS; DESY HERA; CALORIMETER; FRAGMENTATION; PROTON; QCD SO - European Physical Journal C 2005 ;38(4):437-445 12964 UI - 3468 AU - Aktas A AU - Andreev V AU - Anthonis T AU - Asmone A AU - Babaev A AU - Backovic S AU - Bahr J AU - Baranov P AU - Barrelet E AU - Bartel W AU - Baumgartner S AU - Becker J AU - Beckingham M AU - Behnke O AU - Behrendt O AU - Belousov A AU - Berger C AU - Berger N AU - Berndt T AU - Bizot JC AU - Bohme J AU - Boenig MO AU - Boudry V AU - Bracinik J AU - Brisson V AU - Broker HB AU - Brown DP AU - Bruncko D AU - Busser FW AU - Bunyatyan A AU - Buschhorn G AU - Bystritskaya L AU - Campbell AJ AU - Caron S AU - Cassol-Brunner F AU - Cerny K AU - Chekelian V AU - Collard C AU - Contreras JG AU - Coppens YR AU - Coughlan JA AU - Cox BE AU - Cozzika G AU - Cvach J AU - Dainton JB AU - Dau WD AU - Daum K AU - Delcourt B AU - Demirchyan R AU - De Roeck A AU - Desch K AU - De Wolf EA AU - Diaconu C AU - Dingfelder J AU - Dodonov V AU - Dubak A AU - Duprel C AU - Eckerlin G AU - Efremenko V AU - Egli S AU - Eichler R AU - Eisele F AU - Ellerbrock M AU - Elsen E AU - Erdmann M AU - Erdmann W AU - Faulkner PJW AU - Favart L AU - Fedotov A AU - Felst R AU - Ferencei J AU - Fleischer M AU - Fleischmann P AU - Fleming YH AU - Flucke G AU - Flugge G AU - Fomenko A AU - Foresti I AU - Formanek J AU - Franke G AU - Frising G AU - Gabathuler E AU - Gabathuler K AU - Garutti E AU - Garvey J AU - Gassner J AU - Gayler J AU - Gerhards R AU - Gerlich C AU - Ghazaryan S AU - Goerlich L AU - Gogitidze N AU - Gorbounov S AU - Grab C AU - Grassler H AU - Graves J AU - Greenshaw T AU - Gregori M AU - Grindhammer G AU - Gwilliam C AU - Haidt D AU - Hajduk L AU - Haller J AU - Hansson M AU - Heinzelmann G AU - Henderson RCW AU - Henschel H AU - Henshaw O AU - Heremans R AU - Herrera G AU - Herynek I AU - Heuer RD AU - Hildebrandt M AU - Hiller KH AU - Hoting P AU - Hoffman D AU - Horisberger R AU - Hovhannisyan A AU - Ibbotson M AU - Ismail M AU - Jacquet M AU - Janauschek L AU - Janssen X AU - Jemanov V AU - Onsson LJ AU - Johnson DP AU - Jung H AU - Kant D AU - Kapichine M AU - Karlsson M AU - Katzy J AU - Keller N AU - Kennedy J AU - Kenyon IR AU - Kiesling C AU - Klein M AU - Kleinwort C AU - Klimkovich T AU - Kluge T AU - Knies G AU - Knutsson A AU - Koblitz B AU - Korbel V AU - Kostka P AU - Koutouev R AU - Kropivnitskaya A AU - Kroseberg J AU - Kuckens T AU - Kuhr T AU - Landon MPJ AU - Lange W AU - Lastovicka T AU - Laycock P AU - Lebedev A AU - Leissner B AU - Lemrani R AU - Lendermann V AU - Levonian S AU - Lindfeld L AU - Lipka K AU - List B AU - Lobodzinska E AU - Loktionova N AU - Lopez-Fernandez R AU - Lubimov V AU - Lueders H AU - Luke D AU - Lux T AU - Lytkin L AU - Makankine A AU - Malden N AU - Malinovski E AU - Mangano S AU - Marage P AU - Marks J AU - Marshall R AU - Martisikova M AU - Martyn HU AU - Maxfield SJ AU - Meer D AU - Mehta A AU - Meier K AU - Meyer AB AU - Meyer H AU - Meyer J AU - Michine S AU - Mikocki S AU - Milcewicz-Mika I AU - Milstead D AU - Mohamed A AU - Moreau F AU - Morozov A AU - Morozov I AU - Morris JV AU - Mozer MU AU - Muller K AU - Murin P AU - Nagovizin V AU - Naroska B AU - Naumann J AU - Naumann T AU - Newman PR AU - Niebuhr C AU - Nikiforov A AU - Nikitin D AU - Nowak G AU - Nozicka M AU - Oganezov R AU - Olivier B AU - Olsson JE AU - Ossoskov G AU - Ozerov D AU - Pascaud C AU - Patel GD AU - Peez M AU - Perez E AU - Perieanu A AU - Petrukhin A AU - Pitzl D AU - Placakyte R AU - Poschl R AU - Portheault B AU - Povh B AU - Raicevic N AU - Ratiani Z AU - Reimer P AU - Reisert B AU - Rimmer A AU - Risler C AU - Rizvi E AU - Robmann P AU - Roland B AU - Roosen R AU - Rostovtsev A AU - Rurikova Z AU - Rusakov S AU - Rybicki K AU - Sankey DPC AU - Sauvan E AU - Schatzel S AU - Scheins J AU - Schilling FP AU - Schleper P AU - Schmidt S AU - Schmitt S AU - Schneebeli M AU - Schneider M AU - Schoeffel L AU - Schoning A AU - Schroder V AU - Schultz-Coulon HC AU - Schwanenberger C AU - Sedlak K AU - Sefkow F AU - Sheviakov I AD - DESY, D-2000 Hamburg, GermanyRhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, GermanyRhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, GermanyUniv Birmingham, Sch Phys & Astron, Birmingham, W Midlands, EnglandULB VUB, Interuniv Inst High Energies, Brussels, BelgiumUniv Antwerp, B-2020 Antwerp, BelgiumRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandInst Nucl Phys, Krakow, PolandUniv Dortmund, Inst Phys, D-4600 Dortmund, GermanyJoint Inst Nucl Res, Dubna, RussiaCE Saclay, DAPNIA, DSM, CEA, Gif Sur Yvette, FranceUniv Hamburg, Inst Expt Phys, Hamburg, GermanyMax Planck Inst Kernphys, D-69117 Heidelberg, GermanyUniv Heidelberg, Inst Phys, D-6900 Heidelberg, GermanyUniv Heidelberg, Kirchhoff Inst Phys, Heidelberg, GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, GermanySlovak Acad Sci, Inst Expt Phys, Kosice 04353, SlovakiaUniv Lancaster, Dept Phys, Lancaster, EnglandUniv Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, EnglandUniv London Queen Mary & Westfield Coll, London E1 4NS, EnglandLund Univ, Dept Phys, Lund, SwedenUniv Manchester, Dept Phys, Manchester M13 9PL, Lancs, EnglandUniv Mediterranee, CPPM, CNRS, IN2P3, Marseille, FranceCINVESTAV, Dept Fis Aplicada, Merida, Yucatan, MexicoCINVESTAV, Dept Fis, Mexico City 14000, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMax Planck Inst Phys & Astrophys, D-80805 Munich, GermanyUniv Paris 11, LAL, CNRS, IN2P3, Orsay, FranceEcole Polytech, LLR, CNRS, IN2P3, Palaiseau, FranceUniv Paris 06, LPNHE, CNRS, IN2P3, Paris, FranceUniv Paris 07, LPNHE, CNRS, IN2P3, Paris, FranceAcad Sci Czech Republ, Inst Phys, Prague, Czech RepublicCharles Univ, Fac Math & Phys, Prague, Czech RepublicUniv Roma Tre, Dipartimento Fis, Rome, ItalyINFN Roma 3, Rome, ItalyPaul Scherrer Inst, Villigen, SwitzerlandBerg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, GermanyYerevan Phys Inst, Yerevan 375036, ArmeniaDESY, Zeuthen, GermanyETH, Inst Teilchenphys, Zurich, SwitzerlandUniv Zurich, Inst Phys, Zurich, SwitzerlandNatl Tech Univ Athens, Dept Phys, GR-15773 Athens, GreeceBerg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, GermanyUniv Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, GermanySafarik Univ, Kosice, SlovakiaCERN, Geneva, SwitzerlandAktas, A, DESY, Notkestr 85, D-2000 Hamburg, Germany TI - Inclusive production of D+, D-0, D-s(+) and D*(+) mesons in deep inelastic scattering at HERA AB - Inclusive production cross sections are measured in deep inelastic scattering at HERA for meson states composed of a charm quark and a light antiquark or the charge conjugate. The measurements cover the kinematic region of photon virtuality 2 < Q(2) < 100 GeV2, inelasticity 0.05 < y < 0.7, D meson transverse momenta p(t)( D) greater than or equal to 2.5 GeV and pseudorapidity |eta( D)| less than or equal to 1.5. The identification of the D-meson decays and the reduction of the combinatorial background profit from the reconstruction of displaced secondary vertices by means of the H1 silicon vertex detector. The production of charmed mesons containing the light quarks u, d and s is found to be compatible with a description in which the hard scattering is followed by a factorisable and universal hadronisation process MH - Armenia MH - Belgium MH - Czech Republic MH - United Kingdom MH - France MH - Germany MH - Greece MH - Italy MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Poland MH - Russia MH - Slovakia MH - Sweden MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 17 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6044 UR - ISI:000226120100005 L2 - QUARK FRAGMENTATION FUNCTION; CROSS-SECTIONS; O(ALPHA-S) CORRECTIONS; PERTURBATION-THEORY; EP SCATTERING; HEAVY QUARKS; QCD; CHARM; PHOTOPRODUCTION; ANNIHILATION SO - European Physical Journal C 2005 ;38(4):447-459 12965 UI - 1027 AU - Al-Bari MAA AU - Bhuiyan MSA AU - Flores ME AU - Petrosyan P AU - Garcia-Varela M AU - Ul Islam MA AD - UNAM, Biomed Res Inst, Dept Mol Biol & Biotechnol, Mexico City 04510, DF, MexicoRajshahi Univ, Dept Pharm, Rajshahi 6205, BangladeshUniv Tokyo, Dept Biotechnol, Lab Mol Biotechnol, Yayoi 1138657, JapanUniv Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, MexicoFlores, ME, UNAM, Biomed Res Inst, Dept Mol Biol & Biotechnol, AP 70228, Mexico City 04510, DF, Mexico TI - Streptomyces bangladeshensis sp nov., isolated from soil, which produces bis-(2-ethylhexyl)phthalate AB - The taxonomic position of an actinomycete strain isolated from soil from Natore, Bangladesh, was examined by using a polyphasic approach. The strain, designated AAB-4(T), was assigned to the genus Streptomyces on the basis of chemical and morphological criteria. It formed Rectiflexibiles aerial hyphae that carried long chains of rounded spores. The 16S rRNA gene of strain AAB-4(T) was sequenced directly and then compared with those of previously studied streptomycetes following the generation of two phylogenetic trees by using maximum-likeli hood and neighbour-joining algorithms. This confirmed the assignment of the novel strain to the genus Streptomyces. This strain showed a high level of 16S rRNA gene sequence similarity to Streptomyces thermoviolaceus, Streptomyces thermodiastaticus and Streptomyces longisporus, among others, but could be distinguished from them by phenotypic and physiological traits. This micro-organism produces bis-(2-ethylhexyl)phthalate, an antibacterial and antifungal agent. It is proposed that strain AAB-4(T) be classified as a novel species within the genus Streptomyces, as Streptomyces bangladeshensis sp. nov. (type strain, AAB-4(T) =LMG 22738(T) = NRRL B-24326(T)) MH - Bangladesh MH - Japan MH - Mexico|Distrito Federal PB - READING: SOC GENERAL MICROBIOLOGY RP - NOT IN FILE U3 - TC 3 U4 - Microbiology U5 - J;Article AV - English IS - 1466-5026 UR - ISI:000232239600038 L2 - GENETICS ANALYSIS; DNA; CLASSIFICATION; SUBSTITUTIONS; SEQUENCES SO - International Journal of Systematic and Evolutionary Microbiology 2005 ;55():1973-1977 12966 UI - 320 AU - Al-Dweri FMO AU - Rojas EL AU - Lallena AM AD - Univ Granada, Dept Fis Moderna, E-18071 Granada, SpainAppl Sci Private Univ, Dept Phys, Amman, JordanInst Nacl Invest Nucl, Ocoyoacac 52045, MexicoAl-Dweri, FMO, Univ Granada, Dept Fis Moderna, E-18071 Granada, Spain TI - Effects of bone- and air-tissue inhomogeneities on the dose distributions of the Leksell Gamma Knife (R) calculated with PENELOPE AB - Monte Carlo simulation with PENELOPE (version 2003) is applied to calculate Leksell. Gamma Knife (R) dose distributions for heterogeneous phantoms. The usual spherical water phantom is modified with a spherical bone shell simulating the skull and an air-filled cube simulating the frontal or maxillary sinuses. Different simulations of the 201 source configuration of the Gamma Knife have been carried out with a simplified model of the geometry of the source channel of the Gamma Knife recently tested for both single source and multisource configurations. The dose distributions determined for heterogeneous phantoms including the bone- and/or air-tissue interfaces show non-negligible differences with respect to those calculated for a homogeneous one, mainly when the Gamma Knife isocentre approaches the separation surfaces. Our findings confirm an important underdosage (similar to 10%) nearby the air-tissue interface, in accordance with previous results obtained with the PENELOPE code with a procedure different from ours. On the other hand, the presence of the spherical shell simulating the skull produces a few per cent underdosage at the isocentre wherever it is situated MH - Jordan MH - Mexico|Estado De Mexico MH - Spain PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Biomedical;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0031-9155 UR - ISI:000234055900019 L2 - STEREOTACTIC RADIOSURGERY; SIMPLIFIED MODEL; SOURCE CHANNEL; LEKSELL-GAMMA-KNIFE(R); BEAMS SO - Physics in Medicine and Biology 2005 ;50(23):5665-5678 12967 UI - 610 AU - Alas OT AU - Wilson RG AD - Univ Sao Paulo, Inst Matemat & Estatist, BR-05311970 Sao Paulo, BrazilUniv Autonoma Metropolitana Iztapalapa, Unidad Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoAlas, OT, Univ Sao Paulo, Inst Matemat & Estatist, Caixa Postal 66281, BR-05311970 Sao Paulo, Brazil TI - Weaker connected Hausdorff topologies on spaces with a sigma-locally finite base AB - Continuing work of [3], we show that each Hausdorff space with a sigma-locally finite base and uncountable weight admits a weaker connected Hausdorff topology. The results obtained answer Question 3.9 of [3] and generalize theorems of [3] and [5] MH - Brazil MH - Mexico|Distrito Federal PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000228916700008 L2 - connected space;weaker connected Hausdorff topology;locally finite family of open sets;feebly compact space;H-closed space SO - Houston Journal of Mathematics 2005 ;31(2):427-439 12968 UI - 2524 AU - Alas SJ AU - Cordero S AU - Kornhauser I AU - Zgrablich G AD - Univ Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, RA-5700 San Luis, ArgentinaUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City, DF, MexicoZgrablich, G, Univ Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, RA-5700 San Luis, Argentina TI - Kinetic oscillations in the NO plus CO reaction on the Pt(100) surface: An alternative reaction mechanism AB - Kinetic oscillations in the catalytic reduction of NO by CO on a reconstructing Pt(100) surface are simulated by using a dynamic Monte Carlo method. The simulation is based on the HS model and takes into account an alternative reaction mechanism arising from recent experimental findings for the catalytic reduction of No on Rh(111), which replaces the classical N+N recombination step by the formation of a (N-NO)* intermediary species for the production of molecular nitrogen. A synchronized mechanism and spatiotemporal patterns are observed during the oscillations. Oscillations are analyzed in terms of the controlling parameters involved in the reaction mechanism. Different values of these parameters lead to sustained, attenuated, and modulated oscillations. (C) 2005 American Institute of Physics MH - Argentina MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000228559000046 L2 - SPATIOTEMPORAL SELF-ORGANIZATION; NO+CO REACTION; RHODIUM SURFACES; CATALYTIC-REDUCTION; PHASE-TRANSITION; REACTION MODEL; LATTICE-GAS; SYNCHRONIZATION; ADSORPTION; NITROGEN SO - Journal of Chemical Physics 2005 ;122(14): 12969 UI - 75 AU - Albani S AU - Tremoulet A AU - Genovese M AU - Schiff M AU - Dennehey C AU - Posever J AU - Belardi F AU - Santana E AU - Molitor J AU - Bathon J AU - Matteson E AU - Kavanaugh A AU - Martinez A AU - Amox D AU - Keogh E AU - Berry C AU - Cutter G AU - Puga-Yung G AU - Gosch C AU - Koffeman E AU - Friend S AU - Zieseniss P AU - Samodal R AU - Le T AD - Univ Calif San Diego, La Jolla, CA 92093, USADenver Arthrit Ctr, Denver, CO, USAUniv Calif Irvine, Irvine, CA, USAUniv Arizona, Tucson, AZ, USAGuthrie Clin Res, Sayre, PA, USAInst Mexicana, Tijuana, MexicoVirginia Mason Res Ctr, Seattle, WA 98101, USAJohns Hopkins Univ, Baltimore, MD, USAMayo Clin, Rochester, MN, USAUniv Alabama, Birmingham, AL, USA TI - Phase II trial of epitope-specific immunotherapy in rheumatoid arthritis MH - Mexico|Baja California MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000234131500067 SO - Arthritis and Rheumatism 2005 ;52(12):4059-4059 12970 UI - 870 AU - Albarran G AU - Schuler RH AD - Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USAUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoSchuler, RH, Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556, USA TI - Concerted effects of substituents in the reaction of center dot OH radicals with aromatics: The cresols AB - The concerted effects of hydroxyl and methyl substiments in controlling the site of center dot OH radical attack on aromatics in aqueous solutions are explored using the cresols as typical examples. The distributions of dihydroxytoluenes produced in the radiolysis of aqueous solutions of the cresols containing ferricyanide as a radical oxidant were examined by capillary electrophoretic and liquid chromatographic methods. Because center dot OH is a strong electrophile, it adds preferentially at the electron-rich sites of an aromatic ring. As a result, the observed distributions of dihydroxytoluenes reflect the charge distributions in the cresols. It is shown that in the case of m-cresol the hydroxyl substituent has a dominant ortho-para directing effect similar to that observed for phenol. In o- and p-cresol, this effect is modified, indicating, that the methyl substiment has a significant effect on the electronic structure of those cresols. Correlation of the charge distribution in the cresols indicated by the observed distribution of dihydroxytoluenes with the unpaired spin distribution in the corresponding methylphenoxyl radicals demonstrates that the electronic structures of o- and p-cresol and their corresponding phenoxyl radicals are similarly affected by hydroxyl and methyl substitution. Addition of center dot OH at the methyl- substituted positions of o- and p-cresol to produce o- and p-dienone is also reported. The observation of these dienones demonstrates that addition of center dot OH at the ipso positions of alkylated aromatics can be of considerable importance. Mass spectrometric studies show that these dienones have relatively higher proton affinities than their isomeric analogues MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000232612000023 L2 - RADIOLYTIC OXIDATION; (OH)-O-CENTER-DOT RADICALS; TOLUENE; PHENOL SO - Journal of Physical Chemistry A 2005 ;109(41):9363-9370 12971 UI - 2117 AU - Albuquerque UP AU - Andrade LHC AU - Caballero J AD - Univ Fed Rural Pernambuco, LEA, Dept Biol, Area Bot, Recife, PE, BrazilUniv Fed Pernambuco, LEBA, Dept Bot CCB, Recife, PE, BrazilUniv Nacl Autonoma Mexico, Lab Etnobot, Mexico City 04510, DF, MexicoAlbuquerque, UP, Univ Fed Rural Pernambuco, LEA, Dept Biol, Area Bot, Recife, PE, Brazil TI - Structure and floristics of homegardens in Northeastern Brazil AB - Despite their importance, homegardens in Northeast Brazil have not been systematically studied. A study of 31 homegardens in a dry forest region in the municipality of Alagoinha, Pernambuco, Northeastern Brazil, is described here. Species composition and structure as well as plant uses, diversity, and variability are discussed. All together, 54 woody species were found to be used for numerous purposes, especially as food sources. Prosopis julifora is the principal tree species in local homegardens. This species is thoroughly disseminated throughout Brazilian Northeast, and constitutes the majority of the total population of homegarden trees in the region. It was observed that the size of the homegardens varied greatly, but was related only to the number of individual plants present, not species richness. The floristic structure of homegardens is also very variable, but there is a core group of very frequent species, with significant representation of the local flora. This suggests that the homegardens may contribute to the conservation of native species. © 2005 Elsevier Ltd. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 8 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000229573000010 L2 - dry forest;caatinga;ethnobotany;agroforest systems;land-use systems;NORTH-WESTERN TANZANIA; AGROFORESTRY SYSTEMS; SPECIES COMPOSITION; BUKOBA DISTRICT; HOME-GARDENS; DIVERSITY; PRODUCTIVITY; EXAMPLE; MEXICO SO - Journal of Arid Environments 2005 ;62(3):491-506 12972 UI - 1613 AU - Alcala M AU - Vera-Lastra O AU - Walker S AU - Jara L AD - IMSS, Mexico City, DF, MexicoColumbia Univ, New York, NY 10027, USA TI - Hyperprolactinemia secondary to prolactinoma and systemic lupus erythematosus: Probably association a major organ MH - Mexico|Distrito Federal MH - USA PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000229909101127 SO - Annals of the Rheumatic Diseases 2005 ;64():240-240 12973 UI - 216 AU - Alcubierre M AU - Corichi A AU - Gonzalez JA AU - Nunez D AU - Reimann B AU - Salgado M AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Jena, Inst Theoret Phys, D-07743 Jena, GermanyMax Planck Inst Gravit Phys, Albert Einstein Inst, D-14476 Golm, GermanyAlcubierre, M, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Generalized harmonic spatial coordinates and hyperbolic shift conditions AB - We propose a generalization of the condition for harmonic spatial coordinates analogous to the generalization of the harmonic time slices introduced by Bona , and closely related to dynamic shift conditions recently proposed by Lindblom and Scheel, and Bona and Palenzuela. These generalized harmonic spatial coordinates imply a condition for the shift vector that has the form of an evolution equation for the shift components. We find that in order to decouple the slicing condition from the evolution equation for the shift it is necessary to use a rescaled shift vector. The initial form of the generalized harmonic shift condition is not spatially covariant, but we propose a simple way to make it fully covariant so that it can be used in coordinate systems other than Cartesian. We also analyze the effect of the shift condition proposed here on the hyperbolicity of the evolution equations of general relativity in 1+1 dimensions and 3+1 spherical symmetry, and study the possible development of blowups. Finally, we perform a series of numerical experiments to illustrate the behavior of this shift condition MH - Germany MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 1550-7998 UR - ISI:000234274900055 L2 - NUMERICAL RELATIVITY; EVOLUTION; SPACETIME; GAUGE; FORMALISM; EINSTEIN; SHOCKS; SYSTEM SO - Physical Review D 2005 ;72(12): 12974 UI - 1241 AU - Alcubierre M AU - Brugmann B AU - Diener P AU - Guzman FS AU - Hawke I AU - Hawley S AU - Herrmann F AU - Koppitz M AU - Pollney D AU - Seidel E AU - Thornburg J AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Jena, Inst Theoret Phys, D-07743 Jena, GermanyLouisiana State Univ, Ctr Computat Technol, Baton Rouge, LA 70803, USAUniv Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoAlbert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Golm, GermanyUniv Southampton, Sch Math, Southampton SO17 1BJ, Hants, EnglandUniv Texas, Ctr Relativ, Austin, TX 78712, USANASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771, USALouisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803, USAAlcubierre, M, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Dynamical evolution of quasicircular binary black hole data AB - We study the fully nonlinear dynamical evolution of binary black hole data, whose orbital parameters are specified via the effective potential method for determining quasicircular orbits. The cases studied range from the Cook-Baumgarte innermost stable circular orbit (ISCO) to significantly beyond that separation. In all cases we find the black holes to coalesce (as determined by the appearance of a common apparent horizon) in less than half an orbital period. The results of the numerical simulations indicate that the initial holes are not actually in quasicircular orbits, but that they are in fact nearly plunging together. The dynamics of the final horizon are studied to determine physical parameters of the final black hole, such as its spin, mass, and oscillation frequency, revealing information about the inspiral process. We show that considerable resolution is required to extract accurate physical information from the final black hole formed in the merger process, and that the quasinormal modes of the final hole are strongly excited in the merger process. For the ISCO case, by comparing physical measurements of the final black hole formed to the initial data, we estimate that less than 3% of the total energy is radiated in the merger process MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Michoacan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 20 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 1550-7998 UR - ISI:000231565000053 L2 - APPARENT HORIZON FINDERS; 3D NUMERICAL RELATIVITY; GRAVITATIONAL-WAVES; EVENT HORIZONS; 3+1 DIMENSIONS; NORMAL-MODES; INITIAL DATA; SPACETIMES; COLLISION; MECHANICS SO - Physical Review D 2005 ;72(4): 12975 UI - 7 AU - Aldaco F AU - Reyes S AU - Tellez E AU - Torrecillas L AU - Soto C AU - Fernandez R AU - Garcia-Juarez R AU - Cervantes G AU - Saenz J AU - Capdeville D AD - Ctr Med 20 Noviembre ISSSTE, Mexico City, DF, MexicoIMSS, San Luis Potosi, MexicoISSSTEP, Puebla, MexicoIMSS, Mexicali, Baja California, MexicoIMSS, Aguascalientes, MexicoIMSS, Monterrey, MexicoAranda Parra Hosp, Leon, Spain TI - Capecitabine (X) and etoposide (E) for patients (pts) with locally advanced or metastatic gastric cancer: a Mexican Oncology Study Group phase II trial MH - Mexico|Aguascalientes MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|Puebla MH - Mexico|San Luis Potosi MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Oncology U5 - J;Meeting Abstract AV - English IS - 1359-6349 UR - ISI:000247564800728 SO - Ejc Supplements 2005 ;3(2):215-215 12976 UI - 1822 AU - Aldrete JA AU - Reza-Medina M AU - Daud O AU - Lalin-Iglesias S AU - Chiodetti G AU - Guevara U AU - Wikinski JA AU - Torrieri A AD - Arachnoiditis Fdn Inc, Arachnoiditis Clin, Birmingham, AL 35243, USAHosp Gea Gonzalez, Mexico City, DF, MexicoHosp Municipal Bernardino Rivadavia, Buenos Aires, DF, ArgentinaInst Nacl Nutr, Pain Clin, Mexico City, DF, MexicoAldrete, JA, Arachnoiditis Fdn Inc, Arachnoiditis Clin, Birmingham, AL 35243 USA TI - Exacerbation of preexisting neurological deficits by neuraxial anesthesia: report of 7 cases AB - We undertook this case series to determine if preexisting neurological disease is exacerbated by either spinal or epidural anesthesia. In the website of the Arachnoiditis Foundation, we posted an offer to advise anesthesiologists in cases of neurological problems after either of these techniques was used. Contacts were made first by way of the Internet, confirmed by telephone, and maintained by fax, e-mail, or by special mail. Patients here described were cared for and observed by one of the authors, in a hospital, in Argentina or in Mexico. A total of 7 adult, ASA physical status I and 11 patients, including 3 men and 4 women, with subtle symptoms of neurological disease before anesthesia, are described. Two patients had continuous lumbar epidural anesthesia, 3 had spinals; in 2 more, attempted epidural blocks led to accidental dural puncture and were converted to subarachnoid anesthetics. All patients accepted neuraxial anesthesia without informing the anesthesiologists that they had mild neurological symptoms before surgery. Because anesthesiologists did not specifically inquire about subclinical neurological symptoms or prior neurological disease, anesthesiologists are advised to carefully inquire about prior neurological disease whether neuraxial anesthesia techniques are considered. (c) 2005 Elsevier Inc. All rights reserved MH - USA MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Anesthesiology U5 - J;Article AV - English IS - 0952-8180 UR - ISI:000230236200015 L2 - anesthesia;epidural, spinal;medicolegal issues;neurological deficit, exacerbation of;CAUDA-EQUINA SYNDROME; SPINAL-ANESTHESIA; EPIDURAL-ANESTHESIA; LUMBAR ARACHNOIDITIS; MEDICAL MALPRACTICE; LOCAL-ANESTHETICS; FOLLOW-UP; COMPLICATIONS; NERVE; LIDOCAINE SO - Journal of Clinical Anesthesia 2005 ;17(4):304-313 12977 UI - 1328 AU - Alegret L AU - Arenillas I AU - Arz JA AU - Diaz C AU - Grajales-Nishimura JM AU - Melendez A AU - Molina E AU - Rojas R AU - Soria AR AD - Univ Coll London, Dept Earth Sci, London WC1E 6BT, EnglandUniv Zaragoza, Dept Ciencias Tierra, E-50009 Zaragoza, SpainInst Geol & Palaeontol, Havana, CubaInst Mexicano Petr, Mexico City 07730, DF, MexicoMuseo Nacl Hist Nat, Havana 101000, CubaAlegret, L, Univ Coll London, Dept Earth Sci, Mortimer St, London WC1E 6BT, England TI - Cretaceous-Paleogene boundary deposits at Loma Capiro, central Cuba: Evidence for the Chicxulub impact AB - A newly discovered Upper Cretaceous to lower Paleogene section at Loma Capiro (central Cuba) has provided new evidence for a Cretaceous-Palleogene boundary age for the Chicxullub impact. The studied sediments at Loma Capiro consist of a foraminifera-rich marl and sandstone hemipelagic sequence, and a 9.6-m-thick intercalated clastic complex. Planktic foraminifera indicate an upper Maastrichtian age for the sediments below the elastic complex and a lowermost Danian age for those just above this complex. Small benthic foraminifera from below and above the elastic complex indicate deposition at middle to lower bathyal depths. The fining-upward elastic complex consists of a basal breccia that is overlain by microconglomerates and coarse- to fine-grained sandstones. The elastic complex contains reworked foraminifera from different ages and different palleoenvironments and, toward the top, impact material such as altered microtektites, shocked quartz, terrestrial chondrules, and accretionary lapilli. These microfacies suggest deposition from gravity flows that eroded sediments from upper-slope and shelf settings and redeposited them in deeper bathyal environments. We suggest that the origin of the elastic complex may be linked to the collapse of the Cuban platform, triggered by the Cretaceous-Palleogene impact at Chicxulub MH - Cuba MH - United Kingdom MH - Mexico|Distrito Federal MH - Spain PB - BOULDER: GEOLOGICAL SOC AMERICA, INC RP - NOT IN FILE U3 - TC 4 U4 - Geology U5 - J;Article AV - English IS - 0091-7613 UR - ISI:000231585800008 L2 - Chicxulub impact;Cretaceous-Paleogene event;gravity flows;foraminifera;Cuba;TERTIARY BOUNDARY; NORTHEASTERN MEXICO; CRATER; BIOSTRATIGRAPHY; FORAMINIFERA; SPAIN SO - Geology 2005 ;33(9):721-724 12978 UI - 2762 AU - Alencar H AU - Barros A AU - Palmas O AU - Reyes JG AU - Santos W AD - Univ Fed Alagoas, Dept Matemat, BR-57072900 Maceio, AL, BrazilUniv Fed Ceara, Dept Matemat, BR-60455760 Fortaleza, Ceara, BrazilUniv Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Fed Rio de Janeiro, Inst Matemat, BR-21945970 Rio De Janeiro, BrazilAlencar, H, Univ Fed Alagoas, Dept Matemat, BR-57072900 Maceio, AL, Brazil TI - O(m) x O(n)-invariant minimal hypersurfaces in Rm+n AB - We classify the nonextendable immersed O(m) x O(n)-invariant minimal hypersurfaces in the Euclidean space Rm+n, m, n >= 3, analyzing also whether they are embedded or stable. We show also the existence of embedded, complete, stable minimal hypersurfaces in Rm+n, m + n >= 8, m, n >= 3 not homeomorphic to Rm+n-1 that are O(m) x O(n)-invariant MH - Brazil MH - Mexico|Distrito Federal PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0232-704X UR - ISI:000227944200004 L2 - mean curvature;O(m) x O(n)-invariant hypersurfaces;ZERO SCALAR CURVATURE; CONSTANT CURVATURE; SPACE SO - Annals of Global Analysis and Geometry 2005 ;27(2):179-199 12979 UI - 1505 AU - Alexandrov M AU - Gelbukh A AU - Rosso P AD - Natl Polytech Inst, Ctr Res Comp, Mexico City, DF, Mexico. Univ Politecn Valencia, E-46071 Valencia, Spain TI - An approach to clustering abstracts AB - Free access to full-text scientific papers in major digital libraries and other web repositories is limited to only their abstracts consisting of no more than several dozens of words. Current keyword-based techniques allow for clustering such type of short texts only when the data set is multi-category, e.g., some documents are devoted to sport, others to medicine, others to politics, etc. However, they fail on narrow domain-oriented libraries, e.g., those containing all documents only on physics, or all on geology, or all on computational linguistics, etc. Nevertheless, just such data sets are the most frequent and most interesting ones. We propose simple procedure to cluster abstracts, which consists in grouping keywords and using more adequate document similarity measure, We use Stein's MajorClust method for clustering both keywords and documents. We illustrate our approach on the texts from the Proceedings of a narrow-topic conference. Limitations of our approach are also discussed. Our preliminary experiments show that abstracts cannot be clustered with the same quality as full texts, though the achieved quality is adequate for many applications; accordingly, we suggest Makagonov's proposal that digital libraries should provide document images of full texts of the papers (and not only abstracts) for open access via Internet, in order to help in search, classification, clustering, selection, and proper referencing of the papers MH - Mexico|Distrito Federal MH - Spain T3 - NATURAL LANGUAGE PROCESSING AND INFORMATION SYSTEMSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticledyner1950@mail.ru gelbukh@gelbukh.com prosso@dsic.upv.es2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBCO46 AV - English IS - 0302-9743 UR - ISI:000230413100025 SO - 2005 ;():275-285 12980 UI - 305 AU - Alfonso P AU - Prol-Ledesma RM AU - Canet C AU - Melgarejo JC AU - Fallick AE AD - CSIC, Inst Ciencias Terra Jaume Almera, E-08028 Barcelona, SpainUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, SpainSUERC, Isotope Geosci Unit, Glasgow G75 0QF, Lanark, ScotlandAlfonso, P, CSIC, Inst Ciencias Terra Jaume Almera, C Lluis Sole I Sabaris S-N, E-08028 Barcelona, Spain TI - Isotopic evidence for biogenic precipitation as a principal mineralization process in coastal gasohydrothermal vents, Punta Mita, Mexico AB - Mineral deposition in shallow submarine gasohydrothermal vents may be triggered by microbial activity according to isotopic data obtained for sulphides and carbonates. Submarine gasohydrothermal vents in Punta Mita, at the western coast of Mexico, discharge a mixture of water and gas (mainly nitrogen and methane) at a temperature of 85 degrees C. Algal mats cover the areas where thermal fluids are being discharged. The main minerals deposited due to the hydrothermal activity are calcite and pyrite. Moreover, barite, carbonate-hydroxylapatite, cinnabar and Tl-sulphide are actively depositing. Calcite is deposited as fine-scale laminated tufa-like aggregates with interlayered pyrite in thin layers. Cinnabar and Tl-sulphide are present within pyrite layers. In Punta Mita vents, almost all delta(34)S values measured in pyrite range from - 13.3 parts per thousand to - 4.9 parts per thousand, and delta(13)C values in calcite vary from 0 parts per thousand to -39 parts per thousand. These results agree with the hypothesis that calcite and pyrite were deposited by mediation of microbial activity, caused by the coupled reactions of vent methane oxidation and marine sulphate reduction, and suggest that biomineralization prevails over abiotic precipitation processes in such coastal gasohydrothermal vents. The C-14 ages obtained from carbonates, of approximately 40,000 years, may represent the minimum age for the methane that generates the carbonates in the vents. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000234118800008 L2 - sulphur isotopes;pyrite;carbonates;radiocarbon;shallow submarine hydrothermal vents;Mexico;AUTHIGENIC CARBONATES; HYDROTHERMAL SYSTEMS; ANAEROBIC OXIDATION; METHANE; SULFUR; HYDROCARBONS; SEDIMENTS; HYDROGEN; PYRITE; DELTA-S-34 SO - Chemical Geology 2005 ;224(1-3):113-121 12981 UI - 1598 AU - Ali ML AU - Taylor JH AU - Jie L AU - Sun G AU - William M AU - Kasha KJ AU - Reid LM AU - Pauls KP AD - Univ Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, CanadaSlippery Rock Univ, Dept Biol, Slippery Rock, PA 16057, USASt Marys Univ, Dept Biol, Halifax, NS B3H 3C3, CanadaCIMMYT, Mexico City 06600, DF, MexicoAgr & Agri Food Canada, Eastern Cereal & Oilseed Res Ctr, Cent Expt Farm, Ottawa, ON K1A 0C6, CanadaPauls, KP, Univ Guelph, Dept Plant Agr, Guelph, ON N1G 2W1, Canada TI - Molecular mapping of QTLs for resistance to Gibberella ear rot, in corn, caused by Fusarium graminearum AB - Gibberella ear rot, caused by the fungus Fusarium graminearum Schwabe, is a serious disease of corn (Zea mays) grown in northern climates. Infected corn is lower yielding and contains toxins that are dangerous to livestock and humans. Resistance to ear rot in corn is quantitative, specific to the mode of fungal entry (silk channels or kernel wounds), and highly influenced by the environment. Evaluations of ear rot resistance are complex and subjective; and they need to be repeated over several years. All of these factors have hampered attempts to develop E graminearum resistant corn varieties. The aim of this study was to identify molecular markers linked to the genes for resistance to Gibberella ear rot. A recombinant inbred (RI) population, produced from a cross between a Gibberella ear rot resistant line (CO387) and a susceptible line (CG62), was field-inoculated and scored for Gibberella ear rot symptoms in the F-4, F-6, and F-7 generations. The distributions of disease scores were continuous, indicating that resistance is probably conditioned by multiple loci. A molecular linkage map, based on segregation in the F-5 RI population, contained 162 markers distributed over 10 linkage groups and had a total length of 2237 cM with an average distance between markers of 13.8 cM. Composite interval mapping identified I I quantitative trait loci (QTLs) for Gibberella ear rot resistance following silk inoculation and 18 QTLs following kernel inoculation in 4 environments that accounted for 6.7%-35% of the total phenotypic variation. Only 2 QTLs (on linkage group 7) were detected in more than I test for silk resistance, and only I QTL (on linkage group 5) was detected in more than I test for kernel resistance, confirming the strong influence of the environment on these traits. The majority of the favorable alleles were derived from the resistant parent (CO387). The germplasm and markers for QTLs with significant phenotypic effects may be useful for marker-assisted selection to incorporate Gibberella ear rot resistance into commercial corn cultivars MH - Canada MH - Mexico|Distrito Federal MH - USA PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 1 U4 - Biotechnology & Applied Microbiology;Genetics & Heredity U5 - J;Article AV - English IS - 0831-2796 UR - ISI:000230818900016 L2 - Gibberella ear rot;corn;Fusarium graminearum;QTL;linkage map;QUANTITATIVE TRAIT LOCI; HEAD BLIGHT RESISTANCE; SPRING WHEAT; MAIZE; MARKERS; INFECTION; POPULATION; PLANT; RICE; INHERITANCE SO - Genome 2005 ;48(3):521-533 12982 UI - 2192 AU - Allen MF AU - Allen EB AU - Gomez-Pompa A AD - Univ Calif Riverside, Ctr Conservat Biol, Riverside, CA 92521, USAUniv Veracruzana, Ctr Invest CITRO, Xalapa 91000, Veracruz, MexicoAllen, MF, Univ Calif Riverside, Ctr Conservat Biol, Riverside, CA 92521 USA TI - Effects of mycorrhizae and nontarget organisms on restoration of a seasonal tropical forest in Quintana Roo, Mexico: Factors limiting tree establishment AB - We initiated a study of the effects of mycorrhizal fungal community composition on the restoration of tropical dry seasonal forest trees. Tree seedlings were planted in a severely burned experimental site (1995 fire) during the growing season of 1998 at the El Eden Ecological Reserve, in north Quintana Roo, Mexico. Seedlings of Leucaena leucocephala, Guazuma ulmifolia, Caesalpinia violacea, Piscidia piscipula, Gliricidia sepium, and Cochlospermum vitifolium were germinated in steam-sterilized soil and either remained uninoculated (nonmycorrhizal at transplanting) or were inoculated with mycorrhizal fungi in soils from early-seral (recently burned) or late-seral (mature forest) inoculum. Inoculum from the early-seral soil was largely Glomus spp., whereas a diverse community of arbuscular mycorrhizal fungi were reintroduced from the mature forest including species of Scutellospora, Gigaspora, Glomus, Sclerocystis, and Acaulospora. Plants grew better when associated with the mature forest inoculum, unlike a previous experiment in which plants grew taller with the early-seral inoculum. Reasons for the different responses include a less-intense burn resulting in more residual organic matter. In addition to mycorrhizal responses, plants were severely affected by deer browsing. One tree species, C. vitifolium found in the region but not in the reserve, was eliminated by a resident fungal facultative pathogen. Several practical conclusions for restoration can be made. The common nursery practice of soil sterilization may be detrimental because it eliminates beneficial mycorrhizal fungi; species not native to the site may not survive because they may not be adapted to the local pathogens; and herbivory can be severe depending on the landscape context of the restoration MH - USA MH - Mexico|Veracruz PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 4 U4 - Ecology U5 - J;Article AV - English IS - 1061-2971 UR - ISI:000229180600012 L2 - Fusarium;herbivory;mycorrhizae;plant disease;tropical seasonal forest;VESICULAR-ARBUSCULAR-MYCORRHIZAL; FUNGAL DIVERSITY; PLANT; GROWTH; REGENERATION; DYNAMICS; LOWLAND SO - Restoration Ecology 2005 ;13(2):325-333 12983 UI - 2172 AU - Alpay D AU - Luna-Elizarraras ME AU - Shapiro M AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelInst Politecn Nacl, Dept Matemat, Escuela Super Fis & Math, Mexico City 07300, DF, MexicoAlpay, D, Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, Israel TI - Norms of quaternionic extensions of real operators AB - Norms of quaternionic extensions of real operators. We consider bounded linear operators defined on real normed spaces, and with range in quaternionic spaces. We study the norms of the quaternionic extensions of such operators. To cite this article: (c) 2005 Academie des sciences. Publie par Elsevier SAS. Tons droits reserves MH - Israel MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - French IS - 1631-073X UR - ISI:000229388800003 L2 - HILBERT-SPACE SO - Comptes Rendus Mathematique 2005 ;340(9):639-643 12984 UI - 2732 AU - Alpay D AU - Shapiro M AU - Volok D AD - Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelIPN, ESFM, Dept Matemat, Mexico City 07300, DF, MexicoBen Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, IsraelAlpay, D, Ben Gurion Univ Negev, Dept Math, IL-84105 Beer Sheva, Israel TI - Rational hyperholomorphic functions in R-4 AB - We introduce the notion of rationality for hyperholomorphic functions (functions in the kernel of the Cauchy-Fueter operator). Following the case of one complex variable, we give three equivalent definitions: the first in terms of Cauchy-Kovalevskaya quotients of polynomials, the second in terms of realizations and the third in terms of backward-shift invariance. Also introduced and studied are the counterparts of the Arveson space and Blaschke factors. (c) 2004 Elsevier Inc. All rights reserved MH - Israel MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0022-1236 UR - ISI:000227816000005 L2 - hyperholomorphic functions;rational functions;realization theory;SHIFT-INVARIANT SUBSPACES; SPACES; BALL; INTERPOLATION; REALIZATION SO - Journal of Functional Analysis 2005 ;221(1):122-149 12985 UI - 1882 AU - Alpuche J AU - Pereyra A AU - Agundis C AU - Rosas C AU - Pascual C AU - Slomianny MC AU - Vazquez L AU - Zenteno E AD - Univ Nacl Autonoma Mexico, Fac Med, Lab Inmunol, Dept Bioquim, Mexico City 04510, DF, MexicoUNAM, Fac Ciencias, UMP, Lab Ecol & Biol Marina Expt, Yucatan 97130, MexicoUniv Lille 1, UMR CNRS 8576, Lab Chim Biol, F-59655 Villeneuve Dascq, FranceUniv Autonoma Morelos, CIQ, Lab Lectinas, Cuernavaca 60225, Morelos, MexicoZenteno, E, Univ Nacl Autonoma Mexico, Fac Med, Lab Inmunol, Dept Bioquim, POB 70159, Mexico City 04510, DF, Mexico TI - Purification and characterization of a lectin from the white shrimp Litopenaeus setiferus (Crustacea decapoda) hemolymph AB - A 291-kDa lectin (LsL) was purified from the hemolymph of the white shrimp Litopenaeus setiferus by affinity chromatography on glutaraldehyde-fixed stroma from rabbit erythrocytes. LsL is a heterotetramer of two 80-kDa and two 52-kDa subunits, with no covalently-liked carbohydrate, and mainly composed by aspartic and glutamic acids, glycine and alanine, with relatively lower methionine and cysteine contents. Edman degradation indicated that the NH2-terminal of the 80-kDa subunit is composed DASNAQKQHDVNFLL, whereas the NH2-terminal of the 52-kDa subunit is blocked. The peptide mass fingerprint of LsL was predicted from tryptic peptides from each subunit by MALDI-TOF, and revealed that each subunit showed 23 and 22%, respectively, homology with the hemocyanin precursor from Litopenaeus vannamei. Circular dichroism analysis revealed beta sheet and alpha helix contents of 52.7 and 6.1%, respectively. LsL agglutinate at higher titers guinea pig, murine, and rabbit erythrocytes its activity is divalent cation-dependent. N-acetylated sugars, such as GlcNAc, GaINAc, and NeuAc, were the most effective inhibitors of the LsL hemagglutinating activity. Sialylated O-glycosylated proteins, such as bovine submaxillary gland mucin, human IgA, and fetuin, showed stronger inhibitory activity than sialylated N-glycosylated proteins, such as human orosomucoid, IgG, transferrin, and lactoferrin. Desialylation of erythrocytes or inhibitory glycoproteins abolished their capacity to bind LsL, confirming the relevance of sialic acid in LsL-ligand interactions. (c) 2005 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0304-4165 UR - ISI:000230182400009 L2 - lectins;crustaceans;Litopenaeus setiferus;MALDI-TOF;hemocyanin;sialic acid;specific lectin;LIPOPOLYSACCHARIDE-BINDING PROTEIN; DIPHENOL OXIDASE ACTIVITY; SILKWORM BOMBYX-MORI; NON-SELF-RECOGNITION; HORSESHOE-CRAB; MACROBRACHIUM-ROSENBERGII; PERMETHYLATION ANALYSIS; CARBOHYDRATE UNITS; INNATE IMMUNITY; HEMOCYANIN SO - Biochimica et Biophysica Acta-General Subjects 2005 ;1724(1-2):86-93 12986 UI - 132 AU - Alpuche JJ AU - Rosas C AU - Pascual C AU - Slomianny MC AU - Vazquez L AU - Agundis C AU - Pereyra MA AU - Zenteno E AD - UNAM, Fac Ciencias, Lab Ecol & Biol Marina Expt, Sisal, Yucatan, MexicoUniv Lille, Chim Lab, Lille, FranceUNAM, Lab Lectinas, Mexico City, DF, Mexico TI - Biochemical characterization of a lectin from the white shrimp Litopenaeus setiferus (Crustacea : Decapoda) MH - France MH - Mexico|Distrito Federal MH - Mexico|Yucatan PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology U5 - J;Meeting Abstract AV - English IS - 1742-464X UR - ISI:000234826101499 SO - Febs Journal 2005 ;272():287-287 12987 UI - 803 AU - Altamirano E AU - de los Reyes JA AU - Murrieta F AU - Vrinat M AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoInst Rech Catalyse, F-69626 Villeurbanne, FranceInst Mexicano Petr, Mexico City 07730, DF, Mexicode los Reyes, JA, Univ Autonoma Metropolitana Iztapalapa, Av FFCC R Atlixco 186,Col Vicentina, Mexico City 09340, DF, Mexico TI - Hydrodesulfurization of dibenzothiophene and 4,6-dimethyl-dibenzothiophene: Gallium effect over NiMo/Al2O3 sulfided catalysts AB - The influence of gallium on alumina-supported NiMo catalysts was investigated by correlating their physicochemical properties with the hydrodesulfurization (HDS) activity of model molecules. The Ga-gamma-Al2O3 Supports were prepared by impregnation of Ga (0.6-5.9 wt%) on gamma-Al2O3. The NiMo catalysts were prepared following the same method on calcined Ga-Al2O3. The N-2-physisorption results showed that Ga did not affect the textural properties of both gamma-Al2O3 and NiMo/gamma-Al2O3. When the Ga-Al2O3 Supports were calcined at 723 K all Ga ions presented a high dispersion, forming a different structure than that observed in bulk Ga2O3. The XPS and the TPR-S showed that the Ga addition modified the structural properties of NiMo depending on the amount of Ga. In the HDS of DBT and 4.6-DMDBT. the Ga-Al2O3 supported NiMo catalysts at loadings of Ga below to 1.2 wt% showed higher activity than that of a NiMo/Al2O3 sample. (c) 2005 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000232815700016 L2 - Ga2O3;Ga2S3;Al2O3;NiMo;hydrodesulfurization;dibenzothiophene;4,6-dimethyl-dibenzothiophene;XPS;TPR;TEMPERATURE-PROGRAMMED REDUCTION; RAY PHOTOELECTRON-SPECTROSCOPY; ALUMINA CATALYSTS; SELECTIVE REDUCTION; AUGER PARAMETER; LOCAL-STRUCTURE; NICKEL; NO; SUPPORT; SILICA SO - Journal of Catalysis 2005 ;235(2):403-412 12988 UI - 347 AU - Aluja M AU - Sivinski J AU - Rull J AU - Hodgson PJ AD - Inst Ecol AC, Xalapa 91000, Veracruz, MexicoUSDA ARS, Ctr Med Agr & Vet Entomol, Gainesville, FL 32608, USAAluja, M, Inst Ecol AC, Apartado Postal 63, Xalapa 91000, Veracruz, Mexico TI - Behavior and predation of fruit fly larvae (Anastrepha spp.) (Diptera : Tephritidae) after exiting fruit in four types of habitats in tropical Veracruz, Mexico AB - Anastrepha spp. (Diptera: Tephritidae) larval behavior on the ground was quantified, and biotic and abiotic mortality factors were identified from the moment larvae exit fruit until they secure pupation sites in the soil in four environments that differed in climate, soil structure, and fruit tree composition in tropical Mexico (State of Veracruz). Distribution of pupae was influenced by fruit position on the ground but not by shade, litter depth, average soil temperature, soil pH, vegetation cover, and number of predacious insects per surface unit. At all sites, most larvae (90%) entered the soil after exiting the fruit within 10 min, but only at one site did larvae die because of sun exposure during the hottest part of the day. The most important biotic mortality factor at all sites was predation by ants, which in turn was influenced by temperature, humidity, and soil dampness, and varied significantly among host trees within a site. Ants commonly attacked larvae within 5 min of exit from fruit at all but one site. In laboratory experiments, larvae exposed to ant attack pupated at greater depths than larvae exposed to ants but that were not attacked (which in turn pupated at greater depths than larvae not exposed to ants) MH - Mexico|Veracruz MH - USA PB - LANHAM: ENTOMOLOGICAL SOCIETY AMERICA RP - NOT IN FILE U3 - TC 3 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000234031400018 L2 - predation;mortality factors;antipredator behavior;Anastrepha;Tephritidae;FORMICA-RUFA HYMENOPTERA; LIMESTONE WOODLAND; NORTHWEST ENGLAND; SPIDER PREDATORS; ANT; DIAPRIIDAE; HAWAII; FLIES; PUPAE SO - Environmental Entomology 2005 ;34(6):1507-1516 12989 UI - 1480 AU - Alvarado C AU - Garcia-Almendarez BE AU - Martin SE AU - Regalado C AD - Univ Auton Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, PROPAC, Queretaro 76010, MexicoUniv Illinois, Dept Food Sci & Human Nutr, Anim Sci Lab, Urbana, IL 61801, USARegalado, C, Univ Auton Queretaro, Fac Quim, Dept Invest & Posgrado Alimentos, PROPAC, CU Cerro Campanas S-N, Queretaro 76010, Mexico TI - Anti-Listeria monocytogenes bacteriocin-like inhibitory substances from Enterococcus faecium UQ31 isolated from artisan Mexican-style cheese AB - Artisan fresh Mexican-style cheeses are commonly made from raw milk that provides not only rich flavors, but also a diversity of associated lactic acid bacteria (LAB) strains. Enterococcus faecium UQ31 was isolated from panela cheese and produced bacteriocin-like inhibitory substances (BLIS) with a strong anti-Listeria activity. A modified pH-mediated adsorption-desorption purification process resulted in (after SDS-PAGE) two bands showing antimicrobial activities, where most of the activity corresponded to the band with an estimated molecular weight of 7.5 kDa. The BLIS produced by E. faecium UQ31 were heat resistant, stable at ambient storage conditions, and active in the pH range 5-9. The BLIS antimicrobial activities were detected during logarithmic growth phase and remained constant until the end of incubation time (19 h). These BLIS showed a wide anti-Listeria monocytogenes spectra. The E. faecium UQ31 strain or their BLIS represent a promising potential as antimicrobial food preservatives MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Microbiology U5 - J;Article AV - English IS - 0343-8651 UR - ISI:000231220700009 L2 - LACTIC-ACID BACTERIA; GENETIC-CHARACTERIZATION; ANTILISTERIAL BACTERIOCIN; PEDIOCIN FAMILY; PURIFICATION; MANUFACTURE; ENTEROCINS; ORGANISMS; STARTER SO - Current Microbiology 2005 ;51(2):110-115 12990 UI - 2058 AU - Alvarado M AU - Banares-Alcantara R AU - Trujillo A AD - Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, EnglandInst Mexicano Petr, Appl Math & Comp Res Program, Mexico City 07730, DF, MexicoBanares-Alcantara, R, Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England TI - Improving the Organisational Memory by recording decision making, rationale and team configuration AB - We present the architecture of an Organisational Memory including the representation of workflow, participant profiles and the rationale of the decision making process. The added value of the proposed architecture resides in the availability of the recorded experiences and know-how at the individual and team levels for future reuse in planning, decision making and business process optimisation. One of its distinctive features is the consideration and explicit representation of the information related to decision making as a major component of the recorded experiences. The representation of the workflow as well as of the decision making is dynamic, reflecting the evolution of the work process. The suitability of these parts of the architecture is illustrated by an Organisational Memory to be deployed at the IMP concerning the reservoir characterisation process. (c) 2005 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0920-4105 UR - ISI:000229694900007 L2 - organisational memory;team configuration;decision making process;MODELING LANGUAGE; DESIGN PROCESS; MANAGEMENT; SYSTEMS; LA SO - Journal of Petroleum Science and Engineering 2005 ;47(1-2):71-88 12991 UI - 1926 AU - Alvarez CJ AU - Almanza E AU - Murr LE AD - Inst Tecnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, MexicoUniv Texas, Dept Met & Mat Engn, El Paso, TX 79968, USAAlvarez, CJ, Inst Tecnol Saltillo, Dept Met Mecan, Blvd V Carranza 2400, Saltillo 25280, Coahuila, Mexico TI - Evaluation of the sensitization process in 304 stainless steel strained 50% by cold-rolling MH - Mexico|Coahuila MH - USA PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary U5 - J;Letter AV - English IS - 0022-2461 UR - ISI:000229878400030 L2 - PRECIPITATION; TEMPERATURE SO - Journal of Materials Science 2005 ;40(11):2965-2969 12992 UI - 2937 AU - Alvarez F AU - Iliffe TM AU - Villalobos JL AD - Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoTexas A&M Univ, Dept Marine Biol, Galveston, TX 77553, USAAlvarez, F, Univ Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Apartado Postal 70-153, Mexico City 04510, DF, Mexico TI - New species of the genus Typhlatya (Decapoda : Atyidae) from anchialine caves in Mexico, the Bahamas, and Honduras AB - Three new species of the genus Typhlatya from anchialine caves in Mexico (T. dzilamensis), the Bahamas (T. kakuki), and Honduras (T. utilaensis) are described. Typhlatya dzilamensis is the fourth species to be described from the Yucatan Peninsula, Mexico, and is morphologically similar to T. mitchelli. Typhlatya kakuki is the first species of the genus to be described from the Bahamas archipelago. Its morphology departs from the patterns showed by the Cuban species, which are the closest geographically. Typhlatya titilaensis is the first species described from Central America, and is found in Utila, one of the Honduras Bay Islands. Morphologically, T. utilaensis is related to T. monae from Mona Island, Puerto Rico, and Barbuda. A revised diagnosis of the genus and a key for the 17 known species are provided MH - Mexico|Distrito Federal MH - USA PB - SAN ANTONIO: CRUSTACEAN SOC RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0278-0372 UR - ISI:000227398300007 L2 - ISLAND SO - Journal of Crustacean Biology 2005 ;25(1):81-94 12993 UI - 2112 AU - Alvarez L AU - Yi JG AU - Horowitz R AU - Olmos L AD - Natl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720, USAAlvarez, L, Natl Autonomous Univ Mexico, Inst Ingn, Mexico City 04510, DF, Mexico TI - Dynamic friction model-based tire-road friction estimation and emergency braking control AB - An adaptive control scheme for emergency braking of vehicles is designed based on a LuGre dynamic model for the tire-road friction. The wheel angular speed and longitudinal vehicle acceleration information are used to design a fast convergence observer to estimate the vehicle velocity and the internal state of the friction model. The unknown parameters of the dynamic friction model are estimated through a parameter adaptation law. A Lyapunov-based state estimator and a stabilizing braking controller are designed to achieve near to maximum braking capability of the vehicle. Underestimation of the maximum friction coefficient, a very desirable feature from the perspective of safety, is guaranteed by a proper choice of adaptation gains and initial values of the estimated friction parameters MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ASME-AMER SOC MECHANICAL ENG RP - NOT IN FILE U3 - TC 2 U4 - Automation & Control Systems;Instruments & Instrumentation U5 - J;Article AV - English IS - 0022-0434 UR - ISI:000229528500003 L2 - automotive control;adaptive control;nonlinear observers;AUTOMATED HIGHWAY SYSTEMS SO - Journal of Dynamic Systems Measurement and Control-Transactions of the Asme 2005 ;127(1):22-32 12994 UI - 4048 AU - Alvarez M AU - Corbera M AU - Delgado J AU - Llibre J AD - Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Vic, Dept Informat & Matemat, Barcelona 08500, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Matemat, Mexico City 09340, DF, MexicoUniv Autonoma Barcelona, Dept Matemat, E-08193 Barcelona, SpainAlvarez, M, Univ Autonoma Metropolitana Iztapalapa, Dept Matemat, AP 55-534, Mexico City 09340, DF, Mexico TI - The number of planar central configurations for the 4-body problem is finite when 3 mass positions are fixed AB - In the n-body problem a central configuration is formed when the position vector of each particle with respect to the center of mass is a common scalar multiple of its acceleration vector. Lindstrom showed for n=3 and for n>4 that if n-1 masses are located at fixed points in the plane, then there are only a finite number of ways to position the remaining nth mass in such a way that they define a central configuration. Lindstrom leaves open the case n=4. In this paper we prove the case n=4 using as variables the mutual distances between the particles MH - Mexico|Distrito Federal MH - Spain PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000224695400028 L2 - 4-body problem;central configurations SO - Proceedings of the American Mathematical Society 2005 ;133(2):529-536 12995 UI - 3277 AU - Alzaga AG AU - Varon J AU - Baskett P AD - Univ Autonoma Tamaulipas, Tampico, MexicoUniv Texas, Hlth Sci Ctr, St Lukes Episcopal Hosp, Houston, TX, USAFrenchay Hosp, Chippenham SN14 6DQ, Wilts, EnglandBristol Royal Infirm & Gen Hosp, Chippenham SN14 6DQ, Wilts, EnglandVaron, J, 2219 Dorrington, Houston, TX 77030, USA TI - Charles Kite: The clinical epidemiology of sudden cardiac death and the origin of the early defibrillator MH - United Kingdom MH - Mexico|Tamaulipas MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Critical Care Medicine;Emergency Medicine U5 - J;Editorial Material AV - English IS - 0300-9572 UR - ISI:000226569800002 L2 - Charles Kite;resuscitation;historical;sudden death;defibrillation SO - Resuscitation 2005 ;64(1):7-12 12996 UI - 3685 AU - Alzamora SM AU - Salvatori D AU - Tapia MS AU - Lopez-Malo A AU - Welti-Chanes J AU - Fito P AD - Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ind, RA-1428 Buenos Aires, DF, ArgentinaCent Univ Venezuela, Fac Ciencias, Inst Ciencia & Tecnol Alimentos, Caracas 1041, VenezuelaUniv Las Amer Puebla, Dept Ingn Quim & Alimentos, Puebla 72820, MexicoUniv Politecn Valencia, Dept Tecnol Alimentos, E-46071 Valencia, SpainAlzamora, SM, Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ind, Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina TI - Novel functional foods from vegetable matrices impregnated with biologically active compounds AB - Functional foods affect beneficially one or more target functions in the body, beyond adequate nutritional effects, to either improve stage of health and well-being and/or reduce the risk of disease. Lastly, the range of functional foods has grown tremendously. One of the main objectives of the multinational collaborative project entitled "Emerging preservation techniques for foods of concern in Ibero-America" (CYTED Program), carried out from 1999 to 2004, was to analyze the feasibility of atmospheric and/ or in vacuum impregnation treatments to incorporate physiologically active compounds into plant tissues without destroying the initial food matrix. This contribution brings together report of progress in the development of functional fruit and vegetable matrices enriched with probiotics and minerals (calcium and zinc). Main aspects discussed are the kinetics of matrix fortification, the viability of some active compounds and the interactions between calcium, the cell structure and the mechanical properties of fruit and vegetable tissues. Vacuum and/or atmospheric impregnation techniques seem to be feasible technologies for exploitations of fruit and vegetable tissues as new matrices into which functional ingredients can be successfully incorporated, providing novel functional product categories and new commercial opportunities. (C) 2004 Elsevier Ltd. All rights reserved MH - Argentina MH - Mexico|Puebla MH - Spain MH - Venezuela PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000225668600020 L2 - functional foods;vegetable matrix;mineral and probiotics fortification;impregnation;CELL-WALLS; FRUITS; APPLE SO - Journal of Food Engineering 2005 ;67(1-2):205-214 12997 UI - 2405 AU - ameda-Hernandez E AU - McLernon DC AU - Orozco-Lugo AG AU - Lara M AU - Ghogho M AD - Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, EnglandIPN, CINVESTAV, Secc Comun, Mexico City 07360, DF, MexicoAlameda-Hernandez, E, Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England TI - Synchronisation for superimposed training based channel estimation AB - The problem of superimposed training (ST) channel estimation is addressed. In particular, it presents a new synchronisation technique for ST that is based on subspace projections and is computationally much simpler than a recently published synchronisation method. Nevertheless, the performance in terms of BER of both methods is virtually the same MH - United Kingdom MH - Mexico|Distrito Federal PB - HERTFORD: IEE-INST ELEC ENG RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0013-5194 UR - ISI:000228925400036 SO - Electronics Letters 2005 ;41(9):565-567 12998 UI - 3370 AU - Amero JM AU - Vazquez GJ AD - CNRS, Photophys Mol Lab, F-91405 Orsay, FranceUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62210, Morelos, MexicoVazquez, GJ, CNRS, Photophys Mol Lab, F-91405 Orsay, France TI - Electronic structure of NH+: An ab initio study AB - We report ab initio self-consistent field MRSD-CI electronic structure calculations of the NH+ cation. A basis set of DZ + POL quality augmented with Rydberg and bond functions was employed together with an extensive treatment of electron correlation. More than 50 electronic states of NH+ are reported, including doublets, quartets, and sextets. Leading configurations, vertical ionization energies of NH, vertical excitation energies of NH+, and potential energy curves are reported. Spectroscopic properties calculated for the known bound electronic states of NH+ are found in good agreement with experiment. (C) 2004 Wiley Periodicals, Inc MH - France MH - Mexico|Morelos PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Physical;Mathematics, Interdisciplinary Applications;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0020-7608 UR - ISI:000226503400006 L2 - ab initio;astrophysics;electronic structure;NH+;spectroscopy;DISSOCIATION-ENERGIES; THERMONEUTRAL REACTIONS; INTERSTELLAR CLOUDS; VALENCE STATES; SPECTROSCOPY; CH; MOLECULES; ACCURATE; CURVES; X2-PI SO - International Journal of Quantum Chemistry 2005 ;101(4):396-410 12999 UI - 138 AU - Amirjanov A AU - Sobolev K AD - Univ Auton Nuevo Leon, Fac Ingn Civil, San Nicolas de los Garza 66450, NL, MexicoNear E Univ, Dept Comp Engn, Nicosia, CyprusSobolev, K, Univ Auton Nuevo Leon, Fac Ingn Civil, AP 17,Ciudad Univ, San Nicolas de los Garza 66450, NL, Mexico TI - Optimal proportioning of concrete aggregates using a self-adaptive genetic algorithm AB - A linear programming problem of the optimal proportioning of concrete aggregates is discussed; and a self-adaptive genetic algorithm is developed to solve this problem. The proposed method is based on changing a range of variables for capturing the feasible region of the optimum solution. A computational verification of this method is compared with the results of the linear programming MH - Cyprus MH - Mexico|Nuevo Leon PB - DAEJEON: TECHNO-PRESS RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Construction & Building Technology;Engineering, Civil;Materials Science, Characterization & Testing U5 - J;Article AV - English IS - 1598-8198 UR - ISI:000235057800005 L2 - aggregates optimization;concrete mixture proportioning;linear programming;genetic algorithms;PACKING; SPHERES; PARTICLES SO - Computers and Concrete 2005 ;2(5):411-421 13000 UI - 3182 AU - Amor YB AU - Shashkina E AU - Johnson S AU - Bifani PJ AU - Kurepina N AU - Kreiswirth B AU - Bhattacharya S AU - Spencer J AU - Rendon A AU - Catanzaro A AU - Gennaro ML AD - Publ Hlth Res Inst, Newark, NJ, USAUniv Calif Los Angeles, DOE MBI Ctr Genom & Proteom, Los Angeles, CA, USAColorado State Univ, Ft Collins, CO 80523, USAUANL, Univ Hosp Monterrey, Mexico City, DF, MexicoUniv Calif San Diego, San Diego, CA 92103, USAGennaro, ML, 225 Warren St, Newark, NJ 07103, USA TI - Immunological characterization of novel secreted antigens of Mycobacterium tuberculosis AB - Proteins secreted by Mycobacterium tuberculosis are targets of host immune responses and as such are investigated for vaccine and immunodiagnostics development. Computer-driven searches of the M. tuberculosis H(37)Rv genome had previously identified 45 novel secreted proteins. Here, we report the characterization of these antigens in terms of specificity for the M. tuberculosis complex and the ability to induce human immune responses. BLAST homology searches and Southern hybridization identified 10 genes that were either specific for the M. tuberculosis complex or found in only two nontuberculous mycobacterial species of minor medical significance. Selected recombinant proteins were purified from Escherichia coli cells and tested for the ability to elicit antibody responses in tuberculosis patients. Reactivity of the serum panel was '36% with at least one of five novel proteins (Rv0203, Rv0603, Rv1271c, Rv1804c and Rv2253), 56% with the 38 kDa lipoprotein, a M. tuberculosis antigen known to be highly seroreactive, and 68% with a combination of Rv0203, Rv1271c and the 38 kDa antigen. Thus, at least five novel secreted proteins induce antibody responses during active disease; some of these proteins may increase the sensitivity of serological assays based on the 38 kDa antigen MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Immunology U5 - J;Article AV - English IS - 0300-9475 UR - ISI:000226708100004 L2 - ANTIBODY-RESPONSES; ESCHERICHIA-COLI; HOST RESPONSES; 38 KDA; PROTEINS; INFECTION; IDENTIFICATION; EPIDEMIOLOGY; DISEASES; GENOME SO - Scandinavian Journal of Immunology 2005 ;61(2):139-146 13001 UI - 537 AU - Amore P AU - Raya A AU - Fernandez FM AD - Univ Colima, Fac Ciencias, Colima, Colima, MexicoUNLP, CONICET, INIFTA, RA-1900 La Plata, ArgentinaAmore, P, Univ Colima, Fac Ciencias, Bernal Diaz Castillo 340, Colima, Colima, Mexico TI - Alternative perturbation approaches in classical mechanics AB - We discuss two alternative methods, based on the Lindstedt-Poincare technique, for the removal of secular terms from the equations of perturbation theory. We calculate the period of an anharmonic oscillator by means of both approaches and show that one of them is more accurate for all values of the coupling constant. We believe that present discussion and comparison may be a suitable exercise for teaching perturbation theory in advanced undergraduate courses on classical mechanics MH - Argentina MH - Mexico|Colima PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0143-0807 UR - ISI:000233523500023 SO - European Journal of Physics 2005 ;26(6):1057-1063 13002 UI - 1600 AU - Amore P AU - Fernandez FM AD - Univ Colima, Fac Ciencias, Colima, MexicoNatl Univ La Plata, CONICET, INIFTA, RA-1900 La Plata, ArgentinaAmore, P, Univ Colima, Fac Ciencias, Bernal Diaz del Castillo 340, Colima, Mexico TI - Exact and approximate expressions for the period of anharmonic oscillators AB - In this paper, we present a straightforward systematic method for the exact and approximate calculation of integrals that appear in formulae for the period of anharmonic oscillators and other problems of interest in classical mechanics MH - Argentina MH - Mexico|Colima PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0143-0807 UR - ISI:000230918400004 SO - European Journal of Physics 2005 ;26(4):589-601 13003 UI - 2028 AU - Amore P AU - Aranda A AU - Fernandez FM AU - Jones H AD - Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, EnglandUniv Colima, Fac Ciencias, Colima, Colima, MexicoNatl Univ La Plata, CONICET, INIFTA, RA-1900 La Plata, ArgentinaJones, H, Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England TI - A new approximation method for time-dependent problems in quantum mechanics AB - We propose an approximate solution of the time-dependent Schrodinger equation using the method of stationary states combined with a variational matrix method for finding the energies and eigenstates. We illustrate the effectiveness of the method by applying it to the time development of the wave-function in the quantum-mechanical version of the inflationary slow-roll transition. (c) 2005 Elsevier B.V. All rights reserved MH - Argentina MH - United Kingdom MH - Mexico|Colima PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000229653300013 L2 - quantum mechanics;time dependence;approximation methods;principle of minimal sensitivity SO - Physics Letters A 2005 ;340(1-4):87-93 13004 UI - 2029 AU - Amore P AU - Raya A AU - Fernandez FM AD - Univ Colima, Fac Ciencias, Colima, MexicoNatl Univ La Plata, CONICET, INIFTA, RA-1900 La Plata, ArgentinaAmore, P, Univ Colima, Fac Ciencias, Bernal Diaz Castillo 340, Colima, Mexico TI - Comparison of alternative improved perturbative methods for nonlinear oscillations AB - We discuss and compare two alternative perturbation approaches for the calculation of the period of nonlinear systems based on the Lindstedt-Poincare technique. As illustrative examples we choose one-dimensional anharmonic oscillators and the Van der Pol equation. Our results show that each approach is better for just one type of model considered here. (c) 2005 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Colima PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000229653300026 L2 - DELTA-EXPANSION SO - Physics Letters A 2005 ;340(1-4):201-208 13005 UI - 2228 AU - Amore P AU - Coriano C AU - Guzzi M AD - Univ Colima, Fac Ciencias, Colima 28045, MexicoUniv Lecce, Dipartimento Fis, I-73100 Lecce, ItalyIst Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, ItalyUniv Crete, Dept Phys, Iraklion, GreeceUniv Crete, Inst Plasma Phys, Iraklion, GreeceFORTH, Iraklion, GreeceAmore, P, Univ Colima, Fac Ciencias, Av 25 Julio 965, Colima 28045, Mexico TI - Deeply virtual neutrino scattering (DVNS) AB - We introduce the study of neutrino scattering off protons in the deeply virtual kinematics, which describes under a unified formalism elastic and deep inelastic neutrino scattering. A real final state photon and a recoiling nucleon are detected in the few GeV (\t\ similar to 0.2 - 5 GeV) region of momentum transfer. This is performed via an extension of the notion of deeply virtual Compton scattering, or DVCS, to the case of a neutral current exchange. The relevance of this process and of other similar exclusive processes for the study of neutrino interactions in neutrino factories for GeV neutrinos is pointed out MH - Greece MH - Italy MH - Mexico|Colima PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 4 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1126-6708 UR - ISI:000228861300038 L2 - QCD;Parton model;NONFORWARD PARTON DISTRIBUTIONS; COMPTON-SCATTERING; QCD SO - Journal of High Energy Physics 2005 ;(2): 13006 UI - 2851 AU - Amore P AU - Aranda A AU - Saenz R AU - Fernandez FM AD - Univ Colima, Fac Ciencias, Colima, MexicoNatl Univ La Plata, CONICET, INIFTA, RA-1900 La Plata, ArgentinaAmore, P, Univ Colima, Fac Ciencias, Bernal Diaz del Castillo 340, Colima, Mexico TI - Systematic perturbation calculation of integrals with applications to physics AB - In this paper we generalize and improve a method for calculating the period of a classical oscillator and other integrals of physical interest, which was recently developed by some of the authors. We derive analytical expressions that prove to be more accurate than those commonly found in the literature, and test the convergence of the series produced by the approach MH - Argentina MH - Mexico|Colima PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000227459400123 SO - Physical Review e 2005 ;71(1): 13007 UI - 735 AU - Anacona JR AU - Duran R AU - Najera B AU - Rodriguez-Barbarin C AD - Univ Oriente, Dept Quim, Cumana, VenezuelaUniv Autonoma Nuevo Leon, Fac Ciencias Quim, Monterrey, MexicoAnacona, JR, Univ Oriente, Dept Quim, Apartado Postal 208, Cumana, Venezuela TI - Synthesis and crystal structure of a macrocyclic complex precursor: Bis-(2-amino-1-methyliminobenzene)1,2-ethane nickel(II) dichloride AB - NiLCl2 (L = bis-(2-amino-1-methyliminobenzene)1,2-ethane) crystallizes in space group P-1 with a = 9.042( 2), b = 10.263(10), c = 11.045(2) angstrom, alpha = 94.76(10), beta = 108.30(10), gamma = 109.86(10)degrees, Z = 2, and represents a precursor of a tetradentate azamacrocyclic complex. The structure is stabilized by a system of intramolecular and intermolecular H-bonding involving chloride ions and nitrogen atoms. The coordination geometry about nickel(II) is slightly distorted octahedral MH - Mexico|Nuevo Leon MH - Venezuela PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0095-8972 UR - ISI:000233020800001 L2 - nickel;azamacrocycle;hydrogen bonding;structure;CYCLIC AMINE COMPLEXES; MOLECULAR-STRUCTURE; OXIDATION-STATE; AZA MACROCYCLES; METAL-COMPLEXES; LIGAND; ELECTROCHEMISTRY; STABILIZATION; COPPER(II); REDUCTION SO - Journal of Coordination Chemistry 2005 ;58(16):1395-1400 13008 UI - 1144 AU - Ananos GFJ AU - Baldovin F AU - Tsallis C AD - Univ Nacl Trujillo, Dept Acad Fis, Trujillo, PeruUniv Guadalajara, Lagos De Moreno 47460, Jalisco, MexicoUniv Padua, Dipartimento Fis, INFM, I-35131 Padua, ItalyUniv Padua, Sez INFN, I-35131 Padua, ItalySanta Fe Inst, Santa Fe, NM 87501, USACtr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, BrazilAnanos, GFJ, Univ Nacl Trujillo, Dept Acad Fis, Av Juan Pablo II S-N, Trujillo, Peru TI - Anomalous sensitivity to initial conditions and entropy production in standard maps: Nonextensive approach AB - We perform a throughout numerical study of the average sensitivity to initial conditions and entropy production for two symplectically coupled standard maps focusing on the control-parameter region close to regularity. Although the system is ultimately strongly chaotic ( positive Lyapunovexponents), it first stays lengthily in weak-chaotic regions ( zero Lyapunov exponents). We argue that the nonextensive generalization of the classical formalism is an adequate tool in order to get nontrivial information about the first stage of this crossover phenomenon. Within this context we analyze the relation between the power-law sensitivity to initial conditions and the entropy production MH - Brazil MH - Italy MH - Mexico|Jalisco MH - Peru MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000232039900015 L2 - KOLMOGOROV-SINAI ENTROPY; POWER-LAW SENSITIVITY; DYNAMICAL-SYSTEMS; CHAOS; INVARIANT; STATES; RANGE; MODEL SO - European Physical Journal B 2005 ;46(3):409-417 13009 UI - 2323 AU - Anantharaman N AU - Iturriaga R AU - Padilla P AU - Sanchez-Morgado H AD - Ecole Normale Super, UMPA, F-69364 Lyon, FranceCIMAT, Guanajuato, MexicoUniv Nacl Autonoma Mexico, IIMAS, Mexico City 04510, DF, MexicoAnantharaman, N, Ecole Normale Super, UMPA, 46 Allee Italie, F-69364 Lyon, France TI - Physical solutions of the Hamilton-Jacobi equation AB - We consider a Lagrangian system on the d-dimensional torus, and the associated Hamilton-Jacobi equation. Assuming that the Aubry set of the system consists in a finite number of hyperbolic periodic orbits of the Euler-Lagrange flow, we study the vanishing-viscosity limit, from the viscous equation to the inviscid problem. Under suitable assumptions, we show that solutions of the viscous Hamilton-Jacobi equation converge to a unique solution of the inviscid problem MH - France MH - Mexico|Distrito Federal MH - Mexico|Guanajuato PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1531-3492 UR - ISI:000228933600001 L2 - viscosity solution;Hamilton-Jacobi equation;Aubry-Mather set;AUBRY-MATHER THEORY; LAGRANGIAN SYSTEMS; MINIMIZING MEASURES; KAM SOLUTIONS; DYNAMICS SO - Discrete and Continuous Dynamical Systems-Series B 2005 ;5(3):513-528 13010 UI - 549 AU - Ancheyta J AU - Rana MS AU - Furimsky E AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIMAF Grp, Ottawa, ON K1N 8G4, CanadaAncheyta, J, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Hydroprocessing of heavy oil fractions MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Editorial Material AV - English IS - 0920-5861 UR - ISI:000233506500001 SO - Catalysis Today 2005 ;109(1-4):1-2 13011 UI - 550 AU - Ancheyta J AU - Rana MS AU - Furimsky E AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoIMAF Grp, Ottawa, ON K1N 8G4, CanadaAncheyta, J, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Col San Bartolo Atep, Mexico City 07730, DF, Mexico TI - Hydroprocessing of heavy petroleum feeds: Tutorial MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000233506500002 L2 - hydroprocessing;heavy;petroleum;MO-ALUMINA CATALYSTS; TRICKLE-BED REACTORS; COKE DEPOSITION; MAYA CRUDE; HYDROTREATING CATALYSTS; HYDRODESULFURIZATION; OIL; SPENT; HYDRODEMETALLIZATION; DEACTIVATION SO - Catalysis Today 2005 ;109(1-4):3-15 13012 UI - 551 AU - Ancheyta J AU - Centeno G AU - Trejo F AU - Speight JG AD - Inst Mexicano Petr, Mexico City 07730, DF, MexicoInst Tecnol Ciudad Madero, Mexico City 89440, DF, MexicoUNAM, Fac Quim, Mexico City, DF, MexicoCD&W Inc, Laramie, WY 82070, USAAncheyta, J, Inst Mexicano Petr, Eje Cent Lazaro Cardenas 152,Col San BartoloAtepe, Mexico City 07730, DF, Mexico TI - Asphaltene characterization as function of time on-stream during hydroprocessing of Maya crude AB - Determining a series of physical parameters has allowed the behavior of the asphaltene constituents to be monitored during hydrotreating of Maya crude oil. In keeping with the thermal behavior of the asphaltenes constituents, the observations are the aromaticity of the asphaltene increases with time-on-stream and the number and length of the alkyl chains decreases. Sulfur and nitrogen constituents tend to accumulate in the asphaltene before giving rise to carbenes, carboids, and coke. As the reaction progresses, the nickel and vanadium concentrate in the asphaltene fraction, but only to a point (up to 700-h on-stream). After 700-h on-stream, the nickel and vanadium contents of the asphaltene fraction are reduced presumably because the nickel and vanadium concentrate on the coke that is laid down on the catalyst. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000233506500020 L2 - asphaltenes;hydroprocessing;heavy crude;CATALYST DEACTIVATION; OIL; CRACKING SO - Catalysis Today 2005 ;109(1-4):162-166 13013 UI - 1540 AU - Andersson N AU - Cockcroft A AU - Ansari N AU - Omer K AU - Losos J AU - Ledogar RJ AU - Tugwell P AU - Shea B AD - Univ Autonoma Guerrero, Ctr Invest Enfermedades Trop, Acapulco, MexicoInst Populat Hlth, Community Informat & Epidemiol Technol CIETcanada, Ottawa, ON K1N GN5, CanadaCIET Pakistan, Islamabad, PakistanInst Populat Hlth, Fac Med, Ottawa, ON, CanadaCIET Int, New York, NY, USAAndersson, N, Univ Autonoma Guerrero, Ctr Invest Enfermedades Trop, Acapulco, Mexico TI - Household cost-benefit equations and sustainable universal childhood immunisation: a randomised cluster controlled trial in south Pakistan [ISRCTN12421731] AB - Background: Household decision-makers decide about service use based largely on the costs and perceived benefits of health interventions. Very often this leads to different decisions than those imagined by health planners, resulting in under-utilisation of public services like immunisation. In the case of Lasbela district in the south of Pakistan, only one in every ten children is immunised despite free immunisation offers by government health services. Methods/design: In 32 communities representative of Lasbela district, 3344 households participated in a baseline survey on early child health. In the 18 randomly selected intervention communities, we will stimulate discussions on the household cost-benefit equation, as measured in the baseline. The reference (control) communities will also participate in the three annual follow-up surveys, feedback of the general survey results and the usual health promotion activities relating to immunisation, but without focussed discussion on the household cost-benefit equations. Discussion: This project proposes knowledge translation as a two-way communication that can be augmented by local and international evidence. We will document cultural and contextual barriers to immunisation in the context of household cost-benefit equations. The project makes this information accessible to health managers, and reciprocally, makes information on immunisation effects and side effects available to communities. We will measure the impact of this two-way knowledge translation on immunisation uptake MH - Canada MH - Mexico|Guerrero MH - Pakistan MH - USA PB - LONDON: BIOMED CENTRAL LTD RP - NOT IN FILE U3 - TC 1 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 1471-2458 UR - ISI:000231122100001 L2 - DISEASE SO - Bmc Public Health 2005 ;5(): 13014 UI - 665 AU - Andrade E AU - Murillo G AU - Policroniades R AU - Acosta L AU - Zavala EP AU - Rocha MF AU - Centeno SA AD - Univ Nacl Autonoma Mexico, Inst Fis, Dept Fis Expt, Mexico City 01000, DF, MexicoInst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoInst Politecn Nacl, Escuela Super Ingn Mecan & Elect, Mexico City 07738, DF, MexicoMetropolitan Museum Art, Dept Sci Res, New York, NY 10028, USAAndrade, E, Univ Nacl Autonoma Mexico, Inst Fis, Dept Fis Expt, Apartado Postal 20-364, Mexico City 01000, DF, Mexico TI - IBA analysis of some precolumbian gilded-copper samples AB - The elemental composition and depth profiles obtained by IBA techniques on some gilded-copper fragments from the Moche site of Loma Negra, in the Piura Valley, on the Northern Coast of Peru are presented in this article. A previous radiocarbon dating of a wooden fragment indicated that Loma Negra was occupied around 295 AD. A PIXE analysis using a 2.6 MeV external proton beam, was used to obtain the concentration of trace elements in the samples. RBS analyses using 2.72 MeV He-4(+) and 12.0 MeV C-12(3+) were used to obtain the Au, Ag, Cu atomic profiles. NRA with a 1.02 MeV deuteron beam was used to measure the oxygen and carbon concentrations through the O-16(d,p) O-17, O-16(d,alpha) N-14 and C-12(d,p(0)) C-13 reactions. (c) 2005 Published by Elsevier B.V MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000233208400109 L2 - PIXE;RBS;NRA;IBA methods;depth profiles SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2005 ;240(1-2):570-575 13015 UI - 2488 AU - Andrade F AU - Casciola-Rosen LA AU - Rosen A AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoJohns Hopkins Univ, Sch Med, Baltimore, MD, USAAndrade, F, Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Vasco Quiroga 15,Colonia Secc 16, Mexico City 14000, DF, Mexico TI - Generation of novel covalent RNA-protein complexes in cells by ultraviolet B irradiation - implications for autoimmunity AB - Objective. To determine whether ultraviolet B (UVB) irradiation induces novel modifications in autoantigens targeted during experimental photoinduced epidermal damage. Methods. To search for novel UVB-induced autoantigen modifications, lysates made from UVBirradiated human keratinocytes or HeLa cells were immunoblotted using human autoantibodies that recognize ribonucleoprotein autoantigens. Novel autoantigen structures identified were further characterized using nucleases and RNA hybridization. Results. Human sera that recognize U1-70 kd (U1-70K) and La by immunoblotting also recognized multiple novel species when they were used to immunoblot lysates of UVB-irradiated keratinocytes or HeLa cells. These species were not present in control cells and were not observed when apoptosis was induced by Fas ligation or cytotoxic lymphocyte granule contents. Biochemical analysis using multiple assays revealed that these novel UVB-induced molecular species result from the covalent crosslinking between the U1 RNA and the hYRNA molecules with their associated proteins, including U1-70K, La, and likely components of the Sm particle. Conclusion. These data demonstrate that UVB irradiation of live cells can directly induce covalent RNA-protein complexes, which are recognized by human autoantibodies. As previously described for other autoantigens, these covalent complexes of RNA and proteins may have important consequences in terms of antigen capture and processing MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 5 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000228688200021 L2 - SMALL NUCLEAR RIBONUCLEOPROTEIN; SYSTEMIC-LUPUS-ERYTHEMATOSUS; CONNECTIVE-TISSUE DISEASE; HY5 RO RNA; LA SS-B; GRANZYME-B; HUMAN KERATINOCYTES; APOPTOTIC CELLS; DENDRITIC CELLS; CROSS-LINKING SO - Arthritis and Rheumatism 2005 ;52(4):1160-1170 13016 UI - 2085 AU - Andrade JL AU - Meinzer FC AU - Goldstein G AU - Schnitzer SA AD - Ctr Invest Cientif Yucatan, AC Unidad Recursos Nat, Merida 97310, Yucatan, MexicoUSDA, Forest Serv, Forestry Sci Lab, Corvallis, OR 97331, USAUniv Miami, Dept Biol, Coral Gables, FL 33124, USAUniv Wisconsin, Dept Biol Sci, Milwaukee, WI 53211, USAAndrade, JL, Ctr Invest Cientif Yucatan, AC Unidad Recursos Nat, Merida 97310, Yucatan, Mexico TI - Water uptake and transport in lianas and co-occurring trees of a seasonally dry tropical forest AB - Water uptake and transport were studied in eight liana species in a seasonally dry tropical forest on Barro Colorado Island, Panama. Stable hydrogen isotope composition (δ D) of xylem and soil water, soil volumetric water content (θ(v)), and basal sap flow were measured during the 1997 and 1998 dry seasons. Sap flow of several neighboring trees was measured to assess differences between lianas and trees in magnitudes and patterns of daily sap flow. Little seasonal change in θ(v) was observed at 90-120 cm depth in both years. Mean soil water δ D during the dry season was -19&PTSTHOUSND; at 0-30 cm, -34&PTSTHOUSND; at 30-60 cm, and -50&PTSTHOUSND; at 90-120 cm. Average values of xylem δ D among the liana species ranged from -28&PTSTHOUSND; to -44&PTSTHOUSND; during the middle of the dry season, suggesting that water uptake was restricted to intermediate soil layers (30-60 cm). By the end of the dry season, all species exhibited more negative xylem δ D values (-41&PTSTHOUSND; to -62&PTSTHOUSND;), suggesting that they shifted to deeper water sources. Maximum sap flux density in co-occurring lianas and trees were comparable at similar stem diameter (DBH). Furthermore, lianas and trees conformed to the same linear relationship between daily sap flow and DBH. Our observations that lianas tap shallow sources of soil water at the beginning of the dry season and that sap flow is similar in lianas and trees of equivalent stem diameter do not support the common assumptions that lianas rely primarily on deep soil water and that they have higher rates of sap flow than co-occurring trees of similar stem size MH - Mexico|Yucatan MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 5 U4 - Forestry U5 - J;Article AV - English IS - 0931-1890 UR - ISI:000229510100006 L2 - Panama;sap flow;soil volumetric water content;stable hydrogen isotope ratio;tropical forest trees;CANOPY TREES; SAP FLOW; SOIL-WATER; PLANTS; STEMS; TRANSPIRATION; STORAGE; FLUX SO - Trees-Structure and Function 2005 ;19(3):282-289 13017 UI - 1676 AU - Andreatta G AU - Goncalves CC AU - Buffin G AU - Bostrom N AU - Quintella CM AU - rteaga-Larios F AU - Perez E AU - Mullins OC AD - Schlumberger Doll Res Ctr, Ridgefield, CT 06877, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, MexicoMullins, OC, Schlumberger Doll Res Ctr, Old Quarry Rd, Ridgefield, CT 06877 USA TI - Nanoaggregates and structure-function relations in asphaltenes AB - The goal of predictive science is to establish structure-function relations for a system of interest. The obvious first step is to determine the structure of the system. Predictions in asphaltene science have been greatly inhibited, because of disagreement regarding molecular weight and molecular structure. With substantial progress on both structural fronts, structure-function relationships can be explored. Here, high quality factor (high-Q) ultrasonics is used to demonstrate asphaltene nanoaggregation at similar to 100 mg/L. Fluorescence quenching measurements corroborate these results. Simple concepts regarding asphaltene molecular structure can be used to understand asphaltene nanoaggregation. These relations are seen to apply for asphaltene samples of very different origin. The implications of this understanding on larger-scale asphaltene aggregation and solubility are discussed MH - USA MH - Mexico|San Luis Potosi PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 12 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000230706200011 L2 - RESONANCE MASS-SPECTRUM; MOLECULAR-SIZE; AROMATIC-HYDROCARBONS; CRUDE OILS; SPECTROSCOPY; FRACTIONS; FLUORESCENCE; SOLUBILITY; RESOLUTION SO - Energy & Fuels 2005 ;19(4):1282-1289 13018 UI - 2968 AU - Andresen E AU - Pedroza-Espino L AU - Allen EB AU - Perez-Salicrup DR AD - Univ Nacl Autonoma Mexico, Ctr Invest & Ecosistemas, Morelia 58089, Michoacan, MexicoUniv Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521, USAUniv Calif Riverside, Ctr Conservat Biol, Riverside, CA 92521, USAUniv Nacl Autonoma Mexico, Ctr Invest & EcoSistemas, Morelia 58089, Michoacan, MexicoAndresen, E, Univ Nacl Autonoma Mexico, Ctr Invest & Ecosistemas, Apdo Postal 27-3, Morelia 58089, Michoacan, Mexico TI - Effects of selective vegetation thinning on seed removal in secondary forest succession AB - Seed removal was assessed for two tree species in three forest types: (1) secondary forest with and (2) without selective vegetation thinning, and (3) mature forest. Selective vegetation thinning meant the removal of all stems <3 cm in diameter of secondary-forest species and was intended as a management technique to accelerate succession toward mature forest. Thinning did not have an effect on seed removal. One of the species showed lower seed removal in mature forest compared to secondary forest MH - Mexico|Michoacan MH - USA PB - LAWRENCE: ASSOC TROPICAL BIOLOGY INC RP - NOT IN FILE U3 - TC 0 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000227417200018 L2 - forest management;Mexico;secondary forest;seed removal;succession;tropical dry forest;vegetation thinning;TROPICAL RAIN-FOREST; POSTDISPERSAL SEED; DRY FOREST; PREDATION; MEXICO; RESTORATION; ECOLOGY; TREES SO - Biotropica 2005 ;37(1):145-148 13019 UI - 17 AU - Ang AHS AU - De Leon D AD - Univ Calif Irvine, Irvine, CA 92717, USAInst Mexicano Petr, Mexico City 07730, DF, MexicoAng, AHS, Univ Calif Irvine, Irvine, CA 92717, USA TI - Modeling and analysis of uncertainties for risk-informed decisions in infrastructures engineering AB - Engineers deal with uncertainties in all their activities, and must often make decisions under conditions of uncertainty and risk. Infrastructures engineering is no exception-design codes are developed to ensure a desired level of safety and performance, or to ensure a specified operational life with a prescribed level of reliability; the required decisions must often be formulated without complete information and thus contain uncertainties. In considering uncertainties, it is important to recognize two broad types; namely, the aleatory type which is associated with natural randomness and the epistemic type which is associated with imperfect knowledge. Proposed here is a framework for the proper modeling and treatment of each type of uncertainty in the formulation of risk-informed engineering decisions. The concepts are illustrated with applications to bridges and offshore marine structures MH - Mexico|Distrito Federal MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Civil;Engineering, Mechanical U5 - J;Article AV - English IS - 1573-2479 UR - ISI:000242551400003 L2 - uncertainty;probability;consequences;risk;engineering decisions SO - Structure and Infrastructure Engineering 2005 ;1(1):19-31 13020 UI - 814 AU - Angeler DG AU - Sanchez-Carrillo S AU - Rodrigo MA AU - Viedma O AU - varez-Cobelas M AD - Univ Castilla La Mancha, Dpto Ciencias Med Ambiente, E-45071 Toledo, SpainInst Tecnol Sonora, Dpto Ciencias Agua & Med Ambiente, Obregon 85000, Sonora, MexicoUniv Valencia, Inst Cavanilles Biodivers & Biol Evolut, E-46071 Valencia, SpainCSIC, Ctr Ciencias Medioambientales, E-25007 Madrid, SpainAngeler, DG, Univ Castilla La Mancha, Dpto Ciencias Med Ambiente, Ave Carlos 3 S-N, E-45071 Toledo, Spain TI - On the importance of water depth, macrophytes and fish in wetland picocyanobacteria regulation AB - Current paradigms contend abiotic regulation of wetland biota most important, although recent Studies show that biotic configuration can play an important role in wetland functioning within the constraints set by abiotic forces. Picocyanobacteria (PC) - although little studied in wetlands - may prove promising candidates for determining the response to experimental manipulation of important physical and biological components of wetland ecosystems (water depth, vegetation, fish) in the short term, because of their fast growth and high reproduction, and thus to test for the importance of biotic or abiotic regulation of PC in wetlands. In this study, the densities of the dominant fish species (Cyprinus carpio, Lepomis gibbosus and Gambusia holbrooki), and Submerged (charophytes) and emergent (Cladium mariscus) macrophytes were manipulated in enclosures that were installed in deeper (1.0 m) and in shallower (0.4 m) zones of the Spanish National Park, Las Tablas de Daimiel. Principal component analyses showed that the manipulation of biotic elements brought about significant differences in the limnological environment, but PC (chiefly Cyanobium sp.) abundances were relatively unresponsive to the biota-mediated effects. Instead we observed consistently higher PC abundances in all deeper site treatments compared with the shallower site treatments. Generalised linear models suggested that water depth has overridden any biota-mediated regulation of PC. Although the ultimate cause for PC regulation could not be revealed, results indicate that water depth may strongly mediate PC abundances in wetlands. Furthermore the marginal effect of biota-mediated effects, Suggests PC being regulated to a great extent by abiotic forces during our study, thereby matching Current paradigms of wetland functioning MH - Mexico|Sonora MH - Spain PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000232921100003 L2 - wetlands;Cyanobium-type picocyanobacteria;water depth;biotic and abiotic regulation;AUTOTROPHIC PICOPLANKTON; DYNAMICS; QUALITY; BIOMASS; MARINE; SPAIN; LAKE SO - Hydrobiologia 2005 ;549():23-32 13021 UI - 662 AU - Angelova M AU - Frank A AD - Northumbria Univ, Sch Informat, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, EnglandUNAM, Inst Ciencias Nucl, Mexico City, DF, MexicoUNAM, Ctr Ciencias Fis, Mexico City, DF, MexicoAngelova, M, Northumbria Univ, Sch Informat, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England TI - Algebraic approach to thermodynamic properties of diatomic molecules AB - A simple model extending Lie algebraic techniques is applied to the analysis of thermodynamic vibrational properties of diatomic molecules. Local anharmonic effects are described by means of a Morse-like potential and the corresponding anharmonic bosons are associated with the SU(2) algebra. The total number of anharmonic bosons, fixed by the potential shape, is determined for a large number of diatomic molecules. A vibrational high-temperature partition function and the related thermodynamic functions are derived and Studied in terms of the parameters of the model. The idea of a critical temperature is introduced in relation to the specific heat. A physical interpretation in terms of a quantum deformation associated with the model is given. (c) 2005 Pleiades Publishing, Inc MH - United Kingdom MH - Mexico|Distrito Federal PB - MELVILLE: MAIK NAUKA/INTERPERIODICA PUBL RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7788 UR - ISI:000233182900002 L2 - ROTATION-VIBRATION SPECTRA; BENDING VIBRATIONS; MORSE OSCILLATORS; MODEL; SPECTROSCOPY; STATES SO - Physics of Atomic Nuclei 2005 ;68(10):1625-1633 13022 UI - 2242 AU - Angulo O AU - O'Mahony M AD - Univ Calif Davis, Dept Food Sci & Technol, Davis, CA 95616, USAUNIDA, Inst Tecnol Veracruz, Veracruz 91860, MexicoO'Mahony, M, Univ Calif Davis, Dept Food Sci & Technol, Davis, CA 95616 USA TI - The paired preference test and the 'No Preference' option: was Odesky correct? AB - After experimenting with questionnaires, Odesky had recommendations for eliminating 'No Preference' responses in a paired preference test. He concluded that, judges who had chosen the 'No Preference' option would, if forced to choose, express preferences in the same pattern as those who had actually expressed a preference. Using questionnaire, food and personal product stimuli, this conclusion was found to be commonly violated. Odesky's recommendation, to ignore or distribute 'No Preference' responses in the same proportion as expressed preferences was sometimes seen to distort data, sometimes not, depending on relative response frequencies and extent of violation of his conclusion regarding forced preferences. When the number of 'No Preference' responses is not insignificantly small, to eliminate them, runs the risk of distortion of the overall pattern of preferences. (c) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Veracruz MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 4 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0950-3293 UR - ISI:000229165800005 L2 - paired preference test;Odesky;'No Preference' option;INTER-TRIAL VARIATION; BETA-BINOMIAL MODEL; REPLICATED DIFFERENCE SO - Food Quality and Preference 2005 ;16(5):425-434 13023 UI - 1030 AU - Annuk H AU - Torres J AU - Gonzalez-Valencia G AU - Moran AP AD - Natl Univ Ireland, Dept Microbiol, Galway, IrelandInst Mexicano Seguro Social, Unidad Invest Enfermedades Infecciosas, Mexico City, DF, Mexico TI - Lewis expression by Helicobacter pylori isolates of indigenous Nahuatl patients from Mexico MH - Ireland MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology;Microbiology U5 - J;Meeting Abstract AV - English IS - 1083-4389 UR - ISI:000231951800073 SO - Helicobacter 2005 ;10(5):477-477 13024 UI - 2335 AU - Antillon A AU - Gonzalez-Damian J AU - Ortega-Blake I AD - UNAM, CCF, Cuernavaca, Morelos, MexicoCINVESTAV, Merida, Venezuela TI - Pore aggregation model for AmB channels MH - Mexico|Morelos MH - Venezuela PB - BETHESDA: BIOPHYSICAL SOCIETY RP - NOT IN FILE U3 - TC 0 U4 - Biophysics U5 - J;Meeting Abstract AV - English IS - 0006-3495 UR - ISI:000226378501233 SO - Biophysical Journal 2005 ;88(1):252A-252A 13025 UI - 579 AU - Apiquian R AU - Fresan A AU - Ulloa RE AU - de la Fuente-Sandoval C AU - Herrera-Estrella M AU - Vazquez A AU - Nicolini H AU - Kapur S AD - Natl Inst Neurol & Neurosurg Manuel Velasco Suare, Dept Psychiat, Mexico City 14296, DF, MexicoNatl Inst Psychiat Ramon Fuente, Div Clin Res, Mexico City, DF, MexicoChild Psychiat Hosp JN Navarro, Mexico City, DF, MexicoCarracci Med Grp, Mexico City, DF, MexicoPsychiat Hosp Fray Bernardino Alvarez, Mexico City, DF, MexicoMexico City Univ, Dept Genom Med, Mexico City, DF, MexicoUniv Toronto, Schizophrenia Program, Toronto, ON, CanadaUniv Toronto, Dept Psychiat, Toronto, ON, CanadaApiquian, R, Natl Inst Neurol & Neurosurg Manuel Velasco Suare, Dept Psychiat, Av Insurgentes Sur 3877, Mexico City 14296, DF, Mexico TI - Amoxapine as an atypical antipsychotic: A comparative study vs risperidone AB - Amoxapine is marketed as an antidepressant. However, its invitro profile, receptor occupancy and preclinical effects are very similar to atypical antipsychotics. Amoxapine has also shown efficacy as an atypical antipsychotic in open trials. The objective of this study was to compare the antipsychotic and side effect profile of amoxapine and risperidone in a randomised assignment, standardized dosing, double-blind trial of acutely psychotic patients with schizophrenia. A total of 48 schizophrenic patients were enrolled and randomized in a double-blind 6-week trial to receive either risperidone ( up to 5 mg/day) or amoxapine ( up to 250 mg/day). Positive, negative, affective symptoms and motor side effects were measured using standardized weekly assessments. Prolactin levels were also determined at baseline and at the end of the study. A total of 39 patients ( amoxapine, n = 22; risperidone, n 21) completed the trial. Both pharmacological treatments, amoxapine 228.0 mg/day (SD = 34.6) and risperidone 4.5 mg/day (SD = 0.7), showed equivalent improvement in positive, negative, and depressive symptoms. Amoxapine was associated with less EPS and less prolactin elevation than risperidone. These data support previous reports about the efficacy of amoxapine as an atypical antipsychotic. Since amoxapine is off-patent, it may be a valuable low-cost alternative to new atypical antipsychotics, particularly in low-income countries where the majority of the patients are still treated with typical antipsychotics MH - Canada MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 3 U4 - Neurosciences;Pharmacology & Pharmacy;Psychiatry U5 - J;Article AV - English IS - 0893-133X UR - ISI:000233372800013 L2 - amoxapine;risperidone;schizophrenia;atypical;antipsychotic;PSYCHOTIC DEPRESSION; PROLACTIN LEVELS; RATING-SCALE; SCHIZOPHRENIA; HALOPERIDOL; DRUGS; OLANZAPINE; OCCUPANCY; EFFICACY SO - Neuropsychopharmacology 2005 ;30(12):2236-2244 13026 UI - 781 AU - Aragon JL AU - Gomez-Rodriguez A AU - Torres M AD - Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCSIC, Inst Fis Aplicada, E-28006 Madrid, SpainAragon, JL, Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Apartado Postal 1-1010, Queretaro 76000, Mexico TI - Simplified dynamic model for the motility of irregular echinoids AB - Inspired by the locomotion mechanism of sea urchins, we study the locomotion of an irregular echinoid by means of a simplified dynamical model. We prove that if two conjectures are assumed, the geometrical arrangement of the five ambulacral petals of irregular echinoids should form a eutactic star in order to optimize motility. We firstly propose an adequate "measure" of eutacticity that allows us to to verify the statistical tendency to such a property for a representative collection of fossil specimens. Next, regarding dynamics, the biological advantage of eutactic stars is addressed as a minimal path problem. Finally, we study the stability of some eutactic stars under small perturbations MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1539-3755 UR - ISI:000232930600088 L2 - QUADRATIC-FORMS SO - Physical Review e 2005 ;72(4): 13027 UI - 3035 AU - Aragon PE AU - Romero J AU - Negrete P AU - Sharma VK AD - Florida Inst Technol, Dept Chem, Melbourne, FL 32901, USANatl Autonomous Univ Mexico, Inst Marine Sci, Mexico City 04510, DF, MexicoSharma, VK, Florida Inst Technol, Dept Chem, Melbourne, FL 32901, USA TI - Desulfurization of Mexican heavy oil by sulfate-reducing bacteria AB - Twenty-five mixed cultures of sulfate reducing bacteria (SRB) were isolated from sediment and anaerobic digestors samples, collected at southeast Gulf of Mexico, Pacific Ocean, and wastewater treatment plant, Mexico. The isolated SRB mixed cultures were tested for desulfarization of Mexican heavy oil. Desulfurization activity of SRB was not affected by high level of vanadium in heavy oil. Sediment samples gave better sulfur removal performance than anaerobic digestors samples. The difference in removal efficiency of the two samples is possibly related to the different quantity of SRB strains causing degradation of organic sulfur in heavy oil MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: MARCEL DEKKER INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 1093-4529 UR - ISI:000227252100005 L2 - biodegradation;desulfurization;heavy oil;sulfur reducing bacteria;BIODESULFURIZATION; DIBENZOTHIOPHENE; ENUMERATION; WATER SO - Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering 2005 ;40(3):553-558 13028 UI - 971 AU - Arana HAH AU - Attrill MJ AU - Hartley R AU - Bouchot GG AD - El Colegio Frontera Sur, Chetumal 77000, Quintana Roo, MexicoUniv Plymouth, Sch Biol Sci, Marine Biol & Ecol Res Ctr, Plymouth PL4 8AA, Devon, EnglandUniv Plymouth, Sch Geog, Plymouth PL4 8AA, Devon, EnglandIPN, CINVESTAV, Merida 97310, Yucatan, MexicoArana, HAH, El Colegio Frontera Sur, Ave Centenario Km 5-5 Apartado Postal 424, Chetumal 77000, Quintana Roo, Mexico TI - Transitional carbonate-terrigenous shelf sub-environments inferred from textural characteristics of surficial sediments in the Southern Gulf of Mexico AB - The present study describes the spatial and temporal patterns of surficial sediments within the transition zone of the terrigenous and carbonate (CO) provinces in the Southern Gulf of Mexico after flood events during the rainy season of 1999. The sampling design consisted of two across-shelf (A, B) and two along-shelf (C, D) transects that followed depth and sediment gradients. Twelve stations, approximately 7-8 km apart, were allocated to each transect. PVC cores of 10cm in diameter were taken to a depth of 5cm for organic matter (OM), CO content and grain-size analysis after recording relevant information such as corer penetration, characteristics of the surficial layer of sediment and depth of the soft "liquefied" layer if present. OM was determined by combustion and CO content was analysed by acid digestion and titration. Size-frequency distributions (SFDs) were measured using a Malvern Mastersizer X laser particle sizer into 15 whole phi size intervals. A multivariate approach was chosen to look in detail at the derived sediment SFDs and pick up depth-related sub-environments that would help to construct a conceptual model of sediment movement. Additionally, OM and CO content were used to identify the relative influences of river input and CO sediment, together with the bulk sediment surface area/0M relationship to strengthen the interpretation of sediment sources. Three subenvironments were qualitatively identified within the Southern Gulf of Mexico and validated using a multivariate approach, which reflect the across-shelf topography and depth gradient. The spatial pattern was temporally maintained in relation to sediment size distribution and CO content. OM and CO content showed an inverse association in response to the effect of fine sediment of terrigenous origin carrying adsorbed OM. In contrast, CO content seems to be related to coarser material with less surface area and organic content. A number of differences were found between the present MH - United Kingdom MH - Mexico|Quintana Roo MH - Mexico|Yucatan PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Oceanography U5 - J;Article AV - English IS - 0278-4343 UR - ISI:000232506900004 L2 - shelf sediments;grain size;mixed sediments;multivariate analysis;Gulf of Mexico;CONTINENTAL-SHELF; ORGANIC-MATTER; TRANSPORT; LAYER SO - Continental Shelf Research 2005 ;25(15):1836-1852 13029 UI - 2384 AU - Arana HAH AU - Warwick RM AU - Attrill MJ AU - Rowden AA AU - Gold-Bouchot G AD - Univ Plymouth, Marine Biol & Ecol Res Grp, Sch Biol Sci, Plymouth PL4 8AA, Devon, EnglandPlymouth Marine Lab, Plymouth PL1 3DH, Devon, EnglandCINVESTAV, IPN, Merida 97310, Yucatan, MexicoArana, HAH, El Colegio Frontera Sur, Avenida Centenario Km 5-5,Apartado Postal 424, Chetumal 77000, Quintana Roo, Mexico TI - Assessing the impact of oil-related activities on benthic macroinfauna assemblages of the Campeche shelf, southern Gulf of Mexico AB - Considering the long history of oil extraction and the numerous platforms that exist in the southern Gulf of Mexico, a regional approach has been used to investigate the impact of oil-related activities on the macrobenthic community. The objective was to determine the effect of oil-related activity in a region known to have a highly variable benthic community composition due to temporal and spatial variability of its natural environment. A transect design along gradients of natural variables and disturbance intensities, including active oil platforms, was implemented during the rainy and winter storms ('northers') seasons of 1999 to 2000. Univariate and multivariate statistical analyses were applied to a data set of 2 macroinfauna size fractions retained on 0.5 and 2 mm sieves, in conjunction with levels of metals, oil hydrocarbons and a range of natural sediment variables. A pattern of contamination existed, with increased levels of contaminants at stations close to rigs and in areas of high oil platform densities, At these sites, macroinfauna abundance and biomass were reduced, Regression analyses and matching of Biotic to Environmental multivariate patterns (BIO-ENV) indicated that a combination of metals and natural sediment variables best explained the variability in macroinfauna data for all sites. Meta-analysis at phylum level was employed to specifically assess disturbance. The results of this technique were inconsistent between sampling dates due to a complex influence of natural and anthropogenic disturbance. However, increased variability in community composition was linked to oil-related disturbance MH - United Kingdom MH - Mexico|Quintana Roo MH - Mexico|Yucatan PB - OLDENDORF LUHE: INTER-RESEARCH RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0171-8630 UR - ISI:000228927900009 L2 - oil disturbance;infauna;carbonate-terrigenous sediments;multivariate statistics;Gulf of Mexico;OFFSHORE PRODUCTION PLATFORMS; NORTH-SEA; COMMUNITY STRUCTURE; MACROBENTHIC COMMUNITIES; PETROLEUM-HYDROCARBONS; CONTINENTAL-SHELF; TRACE-METALS; SEDIMENTS; POLLUTION; TERM SO - Marine Ecology-Progress Series 2005 ;289():89-107 13030 UI - 1664 AU - Aranda J AU - Rivera JC AU - Jeziorski MC AU - Riesgo-Escovar J AU - Nava G AU - Lopez-Barrera F AU - Quiroz-Mercado H AU - Berger P AU - de la Escalera GM AU - Clapp C AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Queretaro 76001, Qro, MexicoAustrian Acad Sci, Inst Biomed & Aging Res, Innsbruck, AustriaHosp Luis Sanchez Bulnes, APEC, Mexico City, DF, MexicoClapp, C, Univ Nacl Autonoma Mexico, Inst Neurobiol, Campus Juriquilla,Apartado Postal 1-1141, Queretaro 76001, Qro, Mexico TI - Prolactins are natural inhibitors of angiogenesis in the retina AB - PURPOSE. Disruption of the normally antiangiogenic environment of the retina leads to aberrant angiogenesis, the major cause of vision loss throughout the world. Prolactin (PRL), the hormone originally associated with milk production, can be proteolytically processed to 16K-PRL, a 16 kDa N-terminal PRL fragment with potent antiangiogenic and vasoconstrictive actions. This study was conducted to determine whether 16K-PRL is found naturally in the retina and plays a role in angiogenesis and vasodilation. METHODS. Expression of PRL mRNA in rat retina was determined by RT-PCR and in situ hybridization. Western blot was used to examine the expression of PRL and derived fragments in retinal homogenates. The role of PRL and 16K-PRL in the retina was studied by intravitreal injection of either antibodies against PRL or small interfering RNAs ( siRNA), to suppress expression of retinal PRL mRNA. RESULTS. Rat retina expressed PRL mRNA in the outer nuclear, outer plexiform, inner nuclear, and ganglion cell layers. Both full-length PRL and N-terminal 16K-PRL were detected in retinal homogenates by polyclonal and monoclonal antibodies. The intravitreal injection of antibodies able to neutralize the actions of 16K-PRL increased the number of retinal blood vessels and capillary area by threefold. Furthermore, siRNA-mediated inhibition of PRL mRNA increased retinal neovascularization threefold and resulted in a significant increase in vasodilation. CONCLUSIONS. These results demonstrate that PRL is synthesized and cleaved to antiangiogenic 16K-PRL by retinal tissue and that these molecules play a key role in preventing angiogenesis in the healthy retina MH - Austria MH - Mexico|Distrito Federal MH - Mexico|Queretaro PB - ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC RP - NOT IN FILE U3 - TC 10 U4 - Ophthalmology U5 - J;Article AV - English IS - 0146-0404 UR - ISI:000230756100040 L2 - ENDOTHELIAL GROWTH-FACTOR; NITRIC-OXIDE SYNTHASE; POTENT INHIBITOR; 16K PROLACTIN; CATHEPSIN-D; RETINOPATHY; RAT; PREMATURITY; ACTIVATION; EXPRESSION SO - Investigative Ophthalmology & Visual Science 2005 ;46(8):2947-2953 13031 UI - 1537 AU - Araujo G AU - Dumitrescu A AU - Hurtado F AU - Noy A AU - Urrutia J AD - Univ Wisconsin, Dept Comp Sci, Milwaukee, WI 53211, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Politecn Catalunya, Dept Matemat Aplicada 2, E-08028 Barcelona, SpainDumitrescu, A, Univ Wisconsin, Dept Comp Sci, 3200 N Cramer St, Milwaukee, WI 53211 USA TI - On the chromatic number of some geometric type Kneser graphs AB - We estimate the chromatic number of graphs whose vertex set is the set of edges of a complete geometric graph on n points, and adjacency is defined in terms of geometric disjointness or geometric intersection. (c) 2004 Elsevier B.V All rights reserved MH - Mexico|Distrito Federal MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0925-7721 UR - ISI:000230985700004 L2 - Kneser graphs;geometric graphs;pairwise disjoint edges;pairwise crossing edges;CONJECTURE SO - Computational Geometry-Theory and Applications 2005 ;32(1):59-69 13032 UI - 2828 AU - Araya E AU - Hofner P AU - Kurtz S AU - Bronfman L AU - Dedeo S AD - New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USANatl Radio Astron Observ, Socorro, NM 87801, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUniv Chile, Dept Astron, Santiago, ChileArecibo Observ, Arecibo, PR 00612, USAAraya, E, New Mexico Inst Min & Technol, Dept Phys, 801 Leroy Pl, Socorro, NM 87801 USA TI - CH3CN observations toward southern massive star-forming regions AB - In an effort to identify very young sites of massive star formation, we have conducted a survey for hot and dense molecular cores toward a sample of 17 southern sources. The sample consists of sources with IRAS color characteristics of ultracompact H II regions for which high-density molecular material had previously been detected. We observed the J = 5-4, 6-5, 8-7, and 12-11 rotational transitions of CH3CN and derived rotation temperatures and column densities using the population-diagram technique. We identify four sources with a high-temperature molecular component (T-rot > 90 K) as new candidates for hot molecular cores. We also observed the transitions H35 alpha, CS J = 3-2, and the continuum in the 3, 2 mm bands toward 17 sources, and the 1.3 mm continuum, H41 alpha and (CO)-C-13 J = 2-1 transitions toward 10 sources. Eight sources show blue and red wings in the CS J = 3-2 line, whereas three sources show wings in the (CO)-C-13 J = 2-1 spectra, suggestive of molecular outflows. Our continuum and recombination line data show that the 91 GHz continuum emission is dominated by free-free emission from ionized regions, whereas at 147 GHz emission from dust grains contributes significantly MH - Chile MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0067-0049 UR - ISI:000227740300005 L2 - HII regions;ISM : molecules;stars : formation;H-II REGIONS; ULTRACOMPACT HII-REGIONS; RADIO RECOMBINATION LINES; YOUNG STELLAR OBJECTS; METHANOL MASER SURVEY; IRAS POINT SOURCES; METHYL CYANIDE; MOLECULAR CLOUDS; HOT CORES; EMISSION SO - Astrophysical Journal Supplement Series 2005 ;157(2):279-301 13033 UI - 3560 AU - Araya E AU - Hofner P AU - Kurtz S AU - Linz H AU - Olmi L AU - Sewilo M AU - Watson C AU - Churchwell E AD - New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801, USANatl Radio Astron Observ, Socorro, NM 87801, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoThuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, GermanyMax Planck Inst Astron, D-69117 Heidelberg, GermanyCNR, Ist Radioastron, Sez Firenze, I-50125 Florence, ItalyUniv Wisconsin, Dept Astron, Madison, WI 53706, USAAraya, E, New Mexico Inst Min & Technol, Dept Phys, 801 Leroy Pl, Socorro, NM 87801 USA TI - Discovery of an H2CO 6 centimeter maser in IRAS 18566+0408 AB - We report VLA observations toward IRAS 18566+0408 conducted to determine the nature of the H2CO 6 cm emission line recently detected by Araya and coworkers. Our observations clearly show that the H2CO source is due to maser emission, making IRAS 18566+0408 only the fourth Galactic H2CO 6 cm maser source, out of five known H2CO emitters. We also report detection of a weak 2 cm continuum source that is coincident with the H2CO maser. Given the current observational constraints, the maser could be due to the radiative pumping mechanism proposed by Boland de Jong; however, the coincidence of the new H2CO maser with 22 GHz H2O masers suggests that shocked molecular gas could also play a role in its excitation MH - Germany MH - Italy MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 7 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000226048800023 L2 - HII regions;ISM : molecules;masers;radio lines : ISM;stars : formation;ULTRACOMPACT HII-REGIONS; STAR-FORMING REGIONS; IRAS POINT SOURCES; FORMALDEHYDE MASERS; H2O MASERS; EMISSION; CONTINUUM; NGC-7538; AMMONIA; SEARCH SO - Astrophysical Journal 2005 ;618(1):339-343 13034 UI - 1734 AU - arcon-Segovia D AU - arcon-Riquelme M AD - Uppsala Univ, Dept Genet & Pathol, Uppsala, SwedenInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, MexicoAlarcon-Riquelme, M, Uppsala Univ, Dept Genet & Pathol, Uppsala, Sweden TI - Shared autoimmunity: The concept and introduction MH - Mexico|Distrito Federal MH - Sweden PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Immunology U5 - J;Editorial Material AV - English IS - 0891-6934 UR - ISI:000230647500002 SO - Autoimmunity 2005 ;38(3):199-199 13035 UI - 2487 AU - arcon-Segovia D AU - arcon-Riquelme ME AU - Cardiel MH AU - Caeiro F AU - Massardo L AU - Villa AR AU - Pons-Estel BA AD - Univ Uppsala, S-75185 Uppsala, SwedenInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoHosp Privado, Ctr Med Cordoba, Cordoba, ArgentinaPontificia Univ Catolica Chile, Santiago, ChileHosp Escuela Eva Peron, Rosario, ArgentinaAlarcon-Riquelme, ME, Univ Uppsala, Dag Hammarsjoldvag 20, S-75185 Uppsala, Sweden TI - Familial aggregation of systemic lupus erythematosus, rheumatoid arthritis, and other autoimmune diseases in 1,177 lupus patients from the GLADEL cohort AB - Objective. To determine whether there is familial aggregation of systemic lupus erythematosus (SLE) and/or other autoimmune diseases in SLE patients and to identify clinical differences between patients with and those without familial autoimmunity. Methods. We interviewed members of the Grupo Latinoamericano de Estudio del Lupus Eritematoso (GLADEL) inception cohort of 1,214 SLE patients to ascertain whether they had relatives with SLE and/or other autoimmune diseases. Identified relatives were studied. Familial aggregation was tested using reported highest and intermediate population prevalence data for SLE, rheumatoid arthritis (RA), or all autoimmune diseases, and studies were performed to identify the genetic model applicable for SLE. Results. We identified 116 first-, second-, or thirddegree relatives with SLE, 79 with RA, 23 with autoimmune thyroiditis, 3 with scleroderma, 1 with polymyositis, and 16 with other autoimmune diseases, related to 166 of the 1,177 SLE patients in the GLADEL cohort who agreed to participate. Forty-two SLE patients had 2 or more relatives with an autoimmune disease. We found a A(sibling) of 5.8 and 29.0 for SLE and of 3.2-5.3 for RA, when comparing with their reported high or intermediate population prevalence, respectively. We also found familial aggregation for autoimmune disease in general (A(sibling) = 1.5) and determined that for SLE, a polygenic additive genetic model, rather than a multiplicative one, is applicable. Conclusion. In SLE there is familial aggregation of SLE, RA, and autoimmune disease in general. A polygenic additive model applies for SLE. American Indian-white Mestizo SLE patients and those with higher socioeconomic level were more likely to have familial autoimmunity MH - Argentina MH - Chile MH - Mexico|Distrito Federal MH - Sweden PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 30 U4 - Rheumatology U5 - J;Article AV - English IS - 0004-3591 UR - ISI:000228688200019 L2 - PRIMARY BILIARY-CIRRHOSIS; LYMPHOCYTOTOXIC ANTIBODIES; MULTIPLE-SCLEROSIS; SJOGRENS SYNDROME; SUSCEPTIBILITY; PREVALENCE; RELATIVES; HETEROGENEITY; EPIDEMIOLOGY; COMMUNITY SO - Arthritis and Rheumatism 2005 ;52(4):1138-1147 13036 UI - 1414 AU - Ardila A AU - Rosselli W AU - Matute E AU - Guajardo S AD - Florida Int Univ, Dept Commun Sci & Disorders, Miami, FL 33182, USAFlorida Atlantic Univ, Dept Psychol, Boca Raton, FL 33431, USAUniv Guadalajara, Inst Neurosci, Guadalajara, MexicoArdila, A, Florida Int Univ, Dept Commun Sci & Disorders, 12230 NW 8th St, Miami, FL 33182 USA TI - The influence of the parents' educational level on the development of executive functions AB - Information about the influence of educational variables on the development of executive functions is limited. The aim of this study was to analyze the relation of the parents' educational level and the type of school the child attended (private or public school) to children's executive functioning test performance. Six hundred twenty-two participants, ages 5 to 14 years (276 boys, 346 girls) were selected from Colombia and Mexico and grouped according to three variables: age (5-6, 7-8, 9-10, 11-12, and 13-14 years), gender (boys and girls), and school type (private and public). Eight executive functioning tests taken from the Evaluacion Neuropsicologica Infantil; Matute, Rosselli, Ardila, & Ostrosky, in press) were individually administered: Semantic Verbal Fluency, Phonemic Verbal Fluency, Semantic Graphic Fluency, Nonsemantic Graphic Fluency, Matrices, Similarities, Card Sorting, and the Mexican Pyramid. There was a significant effect of age on all the test scores and a significant effect of type of school attended on all but Semantic Verbal Fluency and Nonsemantic Graphic Fluency tests. Most children's test scores, particularly verbal test scores, significantly correlated with parents' educational level. Our results suggest that the differences in test scores between the public and private school children depended on some conditions existing outside the school, such as the parents' level of education. Implications of these findings for the understanding of the influence of environmental factors on the development of executive functions are presented MH - USA MH - Mexico|Jalisco PB - MAHWAH: LAWRENCE ERLBAUM ASSOC INC RP - NOT IN FILE U3 - TC 5 U4 - Psychology, Developmental;Psychology;Psychology, Experimental U5 - J;Article AV - English IS - 8756-5641 UR - ISI:000231280000005 L2 - SPANISH-SPEAKING CHILDREN; SOCIOECONOMIC-STATUS; COGNITIVE-ABILITIES; PRESCHOOL-CHILDREN; CHILDHOOD; ADOLESCENCE; ACHIEVEMENT; PERFORMANCE; ATTAINMENT; VARIANCE SO - Developmental Neuropsychology 2005 ;28(1):539-560 13037 UI - 728 AU - Arellano E AU - Gonzalez-Cozatl FX AU - Rogers DS AD - Brigham Young Univ, Dept Integrat Biol, Provo, UT 84602, USABrigham Young Univ, ML Bean Life Sci Museum, Provo, UT 84602, USAUniv Autonoma Estado Morelos, Ctr Educ Ambiental & Invest Sierra Huautla, Cuernavaca 62210, Morelos, MexicoRogers, DS, Brigham Young Univ, Dept Integrat Biol, Provo, UT 84602, USA TI - Molecular systematics of Middle American harvest mice Reithrodontomys (Muridae), estimated from mitochondrial cytochrome b gene sequences AB - We estimated phylogenetic relationships among 16 species of harvest mice using sequences from the mitochondrial cytochrome b (cyt b) gene. Gene phylogenies constructed using maximum parsimony (MP), maximum likelihood (ML) and Bayesian inference (BI) optimality criteria were largely congruent and arranged taxa into two groups corresponding to the two recognized subgenera (Aporodon and Reithrodontomys). All analyses also recovered R. mexicanus and R. microdon as polyphyletic, although greater resolution was obtained using ML and BI approaches. Within R. mexicanus, three clades were identified with high nodal support (MP and ML bootstrap, Bremer decay and Bayesian posterior probabilities). One represented a subspecies of R. mexicanus from Costa Rica (R. m. cherrii) and a second was distributed in the Sierra Madre Oriental of Mexico. The third R. mexicanus clade consisted of mice from southern Mexico southward to South America. Polyphyly between the two moieties of R. microdon corresponded to the Isthmus of Tehuantepec in southern Mexico. Populations of R. microdon microdon to the east of the isthmus (Chiapas, Mexico) grouped with R. tenuirostris, whereas samples of R. in. albilabris to the west in Oaxaca, Mexico, formed a clade with R. bakeri. Within the subgenus Reithrodontomys, all analyses recovered R. montanus and R. raviventris as sister taxa, a finding consistent with earlier studies based on allozymes and cyt b data. There was also strong support (ML and BI criteria) for a clade consisting of ((R. megalotis, R. zacatecae) (R. sumichrasti)). In addition, cytb gene phylogenies (MP, ML, and BI) recovered R. fulvescens and R. hirsutus (ML and BI) as basal taxa within the subgenus Reithrodontomys. Constraint analyses demonstrated that tree topologies treating the two subgenera (Aporodon and Reithrodontomys) as monophyletic (ML criterion) was significantly better (p > 0.036) and supported polyphyly of R. mexicanus (both ML and MP criteria - p > 0.013) and R. microdon (MP criterion only for certain topologies; p < 0.02). Although several species-level taxa were identified based on multiple, independent data sets, we recommended a conservative approach which will involve thorough analyses of museum specimens including material from type localities together with additional sampling and data from multiple, nuclear gene markers. (c) 2005 Elsevier Inc. All rights reserved MH - Mexico|Morelos MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000232973700017 L2 - Reithrodontomys;Aporodon;Middle America;monophyly;phylogenetic relationships;polyphyly;cytochrome b;candidate species;DNA-SEQUENCES; PHYLOGENETIC-RELATIONSHIPS; BAYESIAN-INFERENCE; CONFIDENCE; RODENTS; AMPLIFICATION; TOPOLOGIES; EVOLUTION; MRBAYES; LIMITS SO - Molecular Phylogenetics and Evolution 2005 ;37(2):529-540 13038 UI - 2631 AU - Aretxaga I AU - Hughes DH AU - Dunlop JS AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoUniv Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, ScotlandAretxaga, I, Inst Nacl Astrofis Opt & Elect, Aptdo Postal 51 & 216, Puebla 72000, Mexico TI - Confirmation of the effectiveness of submm source redshift estimation based on rest-frame radio-FIR photometry AB - We present a comparison between the published optical, infrared (IR) and CO spectroscopic redshifts of 15 ( sub) mm galaxies and their photometric redshifts as derived from long-wavelength ( radio - mm - far- IR) photometric data. The redshift accuracy measured for 12 submillimetre (submm) galaxies with at least one robustly determined colour in the radio - mm - far- IR regime is delta z approximate to 0.30 (rms). Despite the wide range of spectral energy distributions in the local galaxies that are used in an unbiased manner as templates, this analysis demonstrates that photometric redshifts can be efficiently derived for submm galaxies with a precision of delta z < 0.5 using only the rest-frame far-IR to radio wavelength data MH - Mexico|Puebla MH - United Kingdom PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 8 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000228179000008 L2 - surveys;galaxies : evolution;cosmology : miscellaneous;infrared : galaxies;submillimetre;HUBBLE-DEEP-FIELD; SUBMILLIMETER SPECTRAL INDEX; ENERGY-DISTRIBUTION; STAR-FORMATION; NUMBER COUNTS; GALAXIES; POPULATION; DISCOVERY; INDICATOR; STARBURST SO - Monthly Notices of the Royal Astronomical Society 2005 ;358(4):1240-1246 13039 UI - 793 AU - Arias S AU - Terrazas T AU - rreola-Nava HJ AU - Vazquez-Sanchez M AU - Cameron KM AD - Univ Nacl Autonoma Mexico, Inst Biol, Mexico City 04510, DF, MexicoColegio Postgrad, Programa Bot, Montecillo 56230, Estado Mexico, MexicoNew York Bot Garden, Lewis B & Dorothy Cullman Program Mol Systemat St, Bronx, NY 10458, USAArias, S, Univ Nacl Autonoma Mexico, Inst Biol, 70-614, Mexico City 04510, DF, Mexico TI - Phylogenetic relationships in Peniocereus (Cactaceae) inferred from plastid DNA sequence data AB - The phylogenetic relationships of Peniocereus (Cactaceae) species were studied using parsimony analyses of DNA sequence data. The plastid rpl16 and trnL-F regions were sequenced for 98 taxa including 17 species of Peniocereus, representatives from all genera of tribe Pachycereeae, four genera of tribe Hylocereeae, as well as from three additional outgroup genera of tribes Calymmantheae, Notocacteae, and Trichocereeae. Phylogenetic analyses support neither the monophyly of Peniocereus as currently circumscribed, nor the monophyly of tribe Pachycereeae since species of Peniocereus subgenus Pseudoacanthocereus are embedded within tribe Hylocereeae. Furthermore, these results show that the eight species of Peniocereus subgenus Peniocereus (Peniocereus sensu stricto) form a well-supported clade within subtribe Pachycereinae; R serpentinus is also a member of this subtribe, but is sister to Bergerocactus. Moreover, Nyctocereus should be resurrected as a monotypic genus. Species of Peniocereus subgenus Pseudoacanthocereus are positioned among species of Acanthocereus within tribe Hylocereeae, indicating that they may be better classified within that genus. A number of morphological and anatomical characters, especially related to the presence or absence of dimorphic branches, are discussed to support these relationships MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - TOKYO: SPRINGER TOKYO RP - NOT IN FILE U3 - TC 3 U4 - Plant Sciences U5 - J;Article AV - English IS - 0918-9440 UR - ISI:000232935500003 L2 - Cactaceae;Nyctocereus;Peniocereus;phylogeny;rpl16;trnL-F;CHLOROPLAST DNA; PACHYCEREEAE; CHARACTERS SO - Journal of Plant Research 2005 ;118(5):317-328 13040 UI - 1138 AU - Arlot M AU - Meunier PJ AU - Boivin G AU - Haddock L AU - Tamayo J AU - Correa-Rotter R AU - Jasqui S AU - Donley DW AU - Dalsky GP AU - San Martin J AU - Eriksen EF AD - Fac Med R Laennec, INSERM, Unit 403, Lab Histodynam Osseuse, F-69372 Lyon, FranceUniv Puerto Rico, Sch Med, San Juan, PR, USACOMOP AC, Mexico City, DF, MexicoMineral Inst Nacl Ciencias Med & Nutr Salvador Zu, Dept Nefrol & Metab, Mexico City, DF, MexicoEli Lilly & Co, Lilly Res Labs, Indianapolis, IN 46285, USAArlot, M, Fac Med R Laennec, INSERM, Unit 403, Lab Histodynam Osseuse, Rue Guillaume Paradin, F-69372 Lyon, France TI - Differential effects of teriparatide and alendronate on bone remodeling in postmenopausal women assessed by histomorphometric parameters AB - An 18-month randomized double-blind study was conducted in postmenopausal women with osteoporosis to compare the effects of once-daily teriparatide 20 mug with alendronate 10 mug on bone histomorphometry. Biopsies were obtained from 42 patients. Indices of bone formation were significantly higher after 6 to 18 months of teriparatide compared with alendronate treatment. Introduction: Alendronate and teriparatide increased BMD, assessed by DXA, by different mechanisms of action, supported by changes in biochemical markers of bone turnover. The purpose of this cross-sectional study was to explore the differential effects of these two osteoporosis treatments at the bone tissue level by examining bone histomorphometric parameters of bone turnover after either 6 or IS months of treatment. Materials and Methods: Patients were a cohort from a randomized parallel double-blind study conducted to compare the effects of once-daily teriparatide 20 mu g and alendronate 10 mg in postmenopausal women with osteoporosis. Transiliac crest bone biopsies were obtained after tetracycline double labeling from 42 patients treated for 6 months (n = 23) or 18 months (n = 14); 5 additional patients were biopsied from contralateral sides at 6 and 18 months. Biopsy specimens adequate for quantitative analysis were analyzed by 2D histomorphometry from 17 patients at 6 months (teriparatide, n = S; alendronate, n = 9) and 15 patients at 18 months (teriparatide, n = 8; alendronate, n = 7). Data were analyzed by two-sample tests. Results: Histomorphometric indices of bone formation were significantly and markedly greater in the teriparatide group than in the alendronate group at 6 and 18 months, whereas indices of bone resorption were only significantly greater in the teriparatide group than in the alendronate group at 6 months. Bone formation and activation frequency were significantly lower at 18 months compared with 6 months in the teriparatide group, returning to levels comparable with untreated postmenopausal women. In the teriparatide group, the peak in histomorphometric bone formation indices coincided with peak levels for N-terminal propeptide of type I collagen, a biochemical marker of bone formation. The degree of mineralization was lower at 18 months than at 6 months with treatment in both groups but was not different between groups. Conclusions: These results confirm the opposite mechanisms of action of teriparatide and alendronate on bone remodeling and confirm the bone formation effect of teriparatide MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 12 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0884-0431 UR - ISI:000230134100020 L2 - teriparatide;histomorphometry;bone remodeling;bone formation;osteoporosis;HUMAN PARATHYROID-HORMONE; FRACTURE INTERVENTION TRIAL; MINERAL DENSITY; VERTEBRAL FRACTURES; SKELETAL FRAGILITY; TRABECULAR BONE; HIP FRACTURE; OSTEOPOROSIS; TURNOVER; RESORPTION SO - Journal of Bone and Mineral Research 2005 ;20(7):1244-1253 13041 UI - 2173 AU - Arnold BC AU - Villasenor JA AD - Univ Calif Riverside, Riverside, CA 92521, USAColegio Postgrad, Stat Program, Mexico City, DF, MexicoArnold, BC, Univ Calif Riverside, Riverside, CA 92521, USA TI - On the value of imprecise prior information AB - When estimating a single parameter in a Bayesian framework, it may only be possible to elicit information about the prior mean of the parameter and not possible to obtain a value for the prior precision. A variety of possible strategies may be implemented in the presence of such partial prior information. The present article investigates several of these alternatives and presents results of a simulation study which suggests that, in a binomial setting, the pseudo Bayes approach appears to be the method of choice MH - Mexico|Distrito Federal MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0361-0926 UR - ISI:000229291100007 L2 - Bayesian estimation;conjugate prior;empirical Bayes;imprecise Bayes;odds ratio;pseudo Bayes;BAYES SO - Communications in Statistics-Theory and Methods 2005 ;34(4):807-822 13042 UI - 3654 AU - Arredondo A AU - Najera P AD - Natl Publ Hlth Inst, Res Ctr Hlth Syst, Cuernavaca 62508, Morelos, MexicoPanAmer Hlth Org, Washington, DC, USAArredondo, A, Natl Publ Hlth Inst, Res Ctr Hlth Syst, Av Univ 655,Col Sta Maria Ahuacatitlan, Cuernavaca 62508, Morelos, Mexico TI - Who pays more for health services in middle-income countries: lessons from Mexico AB - An evaluative study with a cross-sectional design was carried out on healthcare cost indicators reported by the 2000 National Health Survey in Mexico, to determine which population group had higher health costs/expenditures in relation to family income. The results suggest that in middle-income countries such as Mexico, families with lower incomes tend to pay more for healthcare services. (C) 2004 The Royal Institute of Public Health. Published by Elsevier Ltd. All rights reserved MH - Mexico|Morelos MH - USA PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0033-3506 UR - ISI:000225677600010 L2 - costs;healthcare services;Mexico;CARE; EXPENDITURE SO - Public Health 2005 ;119(2):150-152 13043 UI - 1141 AU - Arslan M AU - Bocca S AU - Mirkin S AU - Barroso G AU - Stadtmauer L AU - Oehninger S AD - Eastern Virginia Med Sch, Jones Inst Reprod Med, Dept Obstet & Gynecol, Norfolk, VA 23507, USAMersin Univ, Dept Obstet & Gynecol, Mersin, TurkeyInst Nacl Perinatol, Mexico City, DF, MexicoOehninger, S, Eastern Virginia Med Sch, Jones Inst Reprod Med, Dept Obstet & Gynecol, 601 Colley Ave, Norfolk, VA 23507 USA TI - Controlled ovarian hyperstimulation protocols for in vitro fertilization: two decades of experience after the birth of Elizabeth Carr AB - Objective: To critically discuss the current protocols for the management of controlled ovarian hyperstimulation in assisted reproduction technology. Design: Review of the literature and presentation of our experience. Main Outcome Measure(s): ovarian response (peak serum estrogen levels, number of oocytes retrieved, quality of oocytes and embryos) and pregnancy outcome (clinical, delivery, and multiple pregnancy rates). Result(s): Controversies still exist regarding selection of gonadotropin preparation, choice of adjuvant therapy with GnRH analogues, and use of oral contraceptive pills. Patients identified as intermediate responders have,an excellent outcome with adjuvant therapy with either a GnRH agonist (long protocol) or a GnRH antagonist, but tailoring of gonadotropin dose must be performed to achieve optimized results. High responders perform favorably with gentler gonadotropin stimulation that minimizes the occurrence of ovarian hyperstimulation syndrome. On the other hand, results in low responders remain suboptimal both in terms of ovarian response and oocyte/embryo quality in spite of a variety of stimulation regimens used. Conclusion(s): Ovarian stimulation is a critical step in in vitro fertilization therapy. A variety of controlled, ovarian hyperstimulation regimens are available and efficacious, but individualization of management is essential and depends on assessment of the ovarian reserve. Identification of the etiologies of poor olvarian response, constitutes a formidable challenge facing reproductive endocrinologists MH - Mexico|Distrito Federal MH - Turkey MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 12 U4 - Obstetrics & Gynecology;Reproductive Biology U5 - J;Review AV - English IS - 0015-0282 UR - ISI:000231988600001 L2 - GnRH analogues;gonadotropins;IVF;ovarian reserve;ovarian stimulation;FOLLICLE-STIMULATING-HORMONE; HUMAN MENOPAUSAL GONADOTROPIN; ASSISTED REPRODUCTIVE TECHNIQUES; HUMAN CHORIONIC-GONADOTROPIN; INTRACYTOPLASMIC SPERM INJECTION; PROSPECTIVE RANDOMIZED-TRIAL; SERUM LUTEINIZING-HORMONE; CITRATE CHALLENGE TEST; RECOMBINANT HUMAN FSH; DAY 3 ESTRADIOL SO - Fertility and Sterility 2005 ;84(3):555-569 13044 UI - 2769 AU - Artola A AU - Carrillo-Castaneda G AD - IPB Semillas, Colonia 70000, UruguayIREGEP, Programa Genet, Colegio Postgrad, Mexico City 56180, DF, MexicoArtola, A, IPB Semillas, E Hurtado 11, Colonia 70000, Uruguay TI - The bulk conductivity test for birdsfoot trefoil seed AB - Seed leakage conductivity was evaluated as a method to estimate seed vigour in Lotus corniculatus L. Effects of seed number and soak time variables were investigated in two seed lots of San Gabriel cultivar with similar germination percentage but different chronological age. When comparing sample sizes of 50, 100, 200 and 1000 seeds, the maximum difference between lots was obtained with 100 seeds (P <= 0.05). The influence of 6, 12, 18 and 24 h of soak duration was estimated and a soak time of 24 It showed the biggest difference between seed lots. This seed vigour test showed a high correlation (r = 0.93 - 0.98**) with seedling emergence in soil. A preliminary validation of this method using samples of 10 seed lots verified its capacity to classify seed lots according to their potential planting value. A conductivity test using four replicates of 100 seeds each soaked in 250 ml deionised water for 24 h at 20 degrees C is therefore recommended MH - Mexico|Distrito Federal MH - Uruguay PB - BASSERSDORF: ISTA-INT SEED TESTING ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences;Horticulture U5 - J;Article AV - English IS - 0251-0952 UR - ISI:000227686300023 L2 - VIGOR SO - Seed Science and Technology 2005 ;33(1):231-236 13045 UI - 898 AU - Arulmani U AU - Heiligers JPC AU - Centurion D AU - Garrelds IM AU - Villalon CM AU - Saxena PR AD - Univ Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, NL-3000 DR Rotterdam, NetherlandsIPN, CINVESTAV, Dept Farmacobiol, Mexico City 07738, DF, MexicoSaxena, PR, Univ Med Ctr Rotterdam, Erasmus MC, Cardiovasc Res Inst COEUR, Dept Pharmacol, POB 1738, NL-3000 DR Rotterdam, Netherlands TI - Lack of effect of the adenosine A(1) receptor agonist, GR79236, on capsaicin-induced CGRP release in anaesthetized pigs AB - Migraine is a common neurological disorder that is associated with an increase in plasma calcitonin gene-related peptide (CGRP) levels. CGRP, a potent vasodilator released from the activated trigeminal sensory nerves, dilates intracranial blood vessels and transmits vascular nociception. Hence, inhibition of trigeminal CGRP release may prevent neurotransmission and, thereby, ameliorate migraine headache. Therefore, the present study in anaesthetized pigs investigates the effects of a selective adenosine A(1) receptor agonist, GR79236 (3, 10 and 30 mu g/kg, i.v.) on capsaicin-induced carotid haemodynamic changes and on plasma CGRP release. Intracarotid (i.c.) infusion of capsaicin (10 mu g/kg/min, i.c.) increased the total carotid blood flow and conductance as well as carotid pulsations, but decreased the difference between arterial and jugular venous oxygen saturations. These responses to capsaicin were dose-dependently attenuated by GR79236. However, the increases in the plasma CGRP concentrations by capsaicin remained essentially unmodified after GR79236 treatment. The above results suggest that GR79236 may have an antimigraine potential due to its postjunctional effects (carotid vasoconstriction) rather than to prejunctional inhibition of trigeminal CGRP release MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology;Neurosciences U5 - J;Article AV - English IS - 0333-1024 UR - ISI:000232657400008 L2 - adenosine;arteriovenous anastomoses;capsaicin;carotid haemodynamics;GR79236;migraine;plasma CGRP levels;porcine;GENE-RELATED PEPTIDE; CAROTID HEMODYNAMIC-CHANGES; RAT SPINAL-CORD; ARTERIOVENOUS ANASTOMOSES; PHARMACOLOGICAL EVIDENCE; ANTIMIGRAINE THERAPY; EFFERENT FUNCTION; MIGRAINE; MEDIATE; NOCICEPTION SO - Cephalalgia 2005 ;25(11):1082-1090 13046 UI - 1417 AU - Arulmani U AU - Heiligers JPC AU - Willems EW AU - Sanchez-Lopez A AU - Villalon CM AU - Saxena PR AD - Erasmus Med Ctr, Dept Pharmacol, Rotterdam, NetherlandsCINVESTAV, IPN, Dept Pharmacobiol, Mexico City 14000, DF, Mexico TI - Effects of sumatriptan on capsaicin-induced porcine carotid haemodynamic changes and CGRP release MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0333-1024 UR - ISI:000230891400115 SO - Cephalalgia 2005 ;25(8):672-672 13047 UI - 2221 AU - Arzate H AU - Alvarez MA AU - Narayanan AS AD - Univ Washington, Sch Med, Dept Pathol, Seattle, WA 98195, USAUNAM, Fac Odontol, Lab Biol Celular & Mol, Mexico City, DF, MexicoNarayanan, AS, Univ Washington, Sch Med, Dept Pathol, Box 357470, Seattle, WA 98195 USA TI - Cyclosporin A promotes mineralization by human cementoblastoma-derived cells in culture AB - Objective: The immunosuppressive drug cyclosporin A has been shown to induce cementum deposition in vivo in experimental animals. Using cementoblastoma-derived cells, we have studied whether this drug will be useful to study cementurn mineralization and differentiation in vitro. Methods: Human cementoblastoma cells and gingival fibroblasts (controls) were cultured and treated with 0.5, 1.0 and 5.0 μ g/ml of cyclosporin A. Cell proliferation was evaluated by MTT (tetrazolium) assay and cell number, and cell viability was assessed by trypan blue dye exclusion. Induction of mineralization was evaluated by alizarin red S staining to detect mineralized nodules and by reverse transcription-polymerase chain reaction (RT-PCR) to assess the expression of bone differentiation markers alkaline phosphatase, osteocalcin, bone sialoprotein and core-binding factor a1 (Cbfa1). Results: Cyclosporin A at 5.0 μ g/ml concentration reduced significantly the increase in the number of cementoblastoma cells. A dose-dependent increase in the number of mineralized nodules occurred in cultures of cementoblastoma-derived cells treated with cyclosporin A, and RT-PCR analyses showed significantly higher levels of expression of alkaline phosphatase, bone sialoprotein, type 1 collagen, matrix metalloprotemase-1, osteocalcin, osteopontin, and Cbfa1. Human gingival fibroblast proliferation and cell number were not affected. Mineralized nodules were not detected in gingival fibroblasts and bone specific proteins were not expressed. Conclusions: Presence of cyclosporin A during 14-day culture period appears to suppress the proliferation of cementoblastoma cells and induce the formation mineralized-like tissue by these cells MH - Mexico|Distrito Federal MH - USA PB - FREDERIKSBERG C: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 3 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0022-3484 UR - ISI:000229071200005 L2 - cementum;cyclosporin A;mineralization;cementoblastoma cells;HUMAN GINGIVAL FIBROBLASTS; RENAL-TRANSPLANT PATIENTS; BONE-MARROW; TUMOR-CELLS; RAT BONE; INVITRO; RESORPTION; EXPRESSION; INDUCTION; CALVARIA SO - Journal of Periodontal Research 2005 ;40(3):218-224 13048 UI - 1512 AU - Asbjornsen H AU - Velazquez-Rosas N AU - Garcia-Soriano R AU - Gallardo-Hernandez C AD - Iowa State Univ, Dept Nat Resource Ecol & Management, Ames, IA 50236, USAUNAM, Lab Ecol Fisiol, Inst Ecol, Mexico City, DF, MexicoFondo Mundial Conservac, Oaxaca, MexicoInst Ecol AC, Herbario XAL, Xalapa, Veracruz, MexicoAsbjornsen, H, Iowa State Univ, Dept Nat Resource Ecol & Management, 253 Bessey Hall, Ames, IA 50236 USA TI - Deep ground fires cause massive above- and below-ground biomass losses in tropical montane cloud forests in Oaxaca, Mexico AB - Although fire is occurring at greater frequencies and spatial scales in the moist tropics, few Studies have examined theecological impacts of fire in tropical montane cloud forest (TMCF). This study, conducted in the Chimalapas region of Oaxaca, Mexico, documents changes in live tree biomass, live fine-root biomass, and fallen and standing dead wood 4 y following deep ground fires occurring in TMCF during the -1997-98 El Nino Southern Oscillation event. Forests growing on two different substrates (metamorphic and sedimentary) and having three different statures (mean canopy heights: 20-30 m, 15-20 m and 4-6 m) were assessed within six paired plots established on adjacent burned and unburned forest sites. Total live tree biomass was 82%, and 88%,, lower for burned TMCF growing on metamorphic and sedimentary substrates, respectively, compared with unburned TMCF. Nearly 100'% of the living biomass was killed in elfin TMCF located on exposed sedimentary limestone at the highest elevations. Live fine-root biomass in the upper organic soil horizon of burned TMCF sites was 49%) lower on metamorphic substrates and 77%) lower on sedimentary substrates compared with unburned sites. The amount of total dead wood was 3- to 14-fold greater in burned forests compared with unburned forests. These results suggest that first-time fires in relatively undisturbed TMCF can cause dramatic changes in live above- and below-ground biomass at levels greatly exceeding values reported for most lowland tropical rain forests. These patterns may be attributed to the slower decomposition rates and thick organic soils typical of TMCF, combined with the relatively fast drainage associated with steep topography and, in some locations, sedimentary limestone-derived substrates MH - USA MH - Mexico|Distrito Federal MH - Mexico|Oaxaca MH - Mexico|Veracruz PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000231009300008 L2 - Chimalapas;disturbance dynamics;ecosystem recovery;tire;Mexico;Oaxaca;root biomass;tropical montane cloud forest;woody biomass;FINE-ROOT BIOMASS; RAIN-FOREST; PUERTO-RICO; HABITAT FRAGMENTATION; POSITIVE FEEDBACKS; LUQUILLO MOUNTAINS; TREE MORTALITY; EASTERN AMAZON; PRODUCTIVITY; RESPONSES SO - Journal of Tropical Ecology 2005 ;21():427-434 13049 UI - 899 AU - Ascanio G AU - Tanguy PA AD - Ecole Polytech, Dept Chem Engn, URPEI, Montreal, PQ H3C 3A7, CanadaNatl Autonomous Univ Mexico, CCADET, Mexico City 04510, DF, MexicoTanguy, PA, Ecole Polytech, Dept Chem Engn, URPEI, Andre Aisenstadt Bldg,Room M-5505,POB 6079 Stn Ct, Montreal, PQ H3C 3A7, Canada TI - Mixing of shear-thinning fluids with dual off-centred impellers AB - Mixing times for inelastic shear-thinning fluids in stirred tanks have been experimentally investigated using a combination of two off-centred impellers operating in both co- and counter-rotating modes. A colour-discolouration technique based on fast acid-base reaction was used for the determination of the mixing times as well as to reveal the possible presence of caverns and dead regions. A statistical plan of experiments allowed determining the effects of the impeller position, the rotational speed, the flow behaviour index, the impeller type and their mutual interactions. A stronger influence of the impeller position on mixing times was observed for both rotating modes with fluids exhibiting pronounced shear-thinning. It was also found that segregated regions could be readily destroyed by dual off-centred impellers as compared with the single centred impeller configuration. Mixed flow impellers were shown to be less efficient in terms of mixing times than radial flow impellers. Results obtained under the best operating conditions were compared to steady stirring experiments showing the potential and drawbacks of the proposed scenarios MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: CANADIAN SOC CHEMICAL ENGINEERING RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical U5 - J;Article AV - English IS - 0008-4034 UR - ISI:000232458300001 L2 - off-centred impellers;shear-thinning;mixing times;non-Newtonian;flow patterns;caverns;dead zones;NON-NEWTONIAN FLUIDS; CHAOTIC FLOWS; COAXIAL MIXER; VESSELS; REGIME SO - Canadian Journal of Chemical Engineering 2005 ;83(3):393-400 13050 UI - 2573 AU - Ascanio G AU - Carreau PJ AU - Reglat O AU - Tanguy PA AD - Natl Autonomous Univ Mexico, Ctr Appl Sci & Technol Dev, Mexico City 04510, DF, MexicoEcole Polytech, Dept Chem Engn, Ctr Appl Res Polymers, Montreal, PQ H3C 3A7, CanadaCompagnie Essais Ind Inc, Montreal, PQ H1Y 3J2, CanadaAscanio, G, Natl Autonomous Univ Mexico, Ctr Appl Sci & Technol Dev, POB 70-186, Mexico City 04510, DF, Mexico TI - Extensional rheology of coating suspensions in relation with misting in film coaters AB - Coating suspensions are submitted to very high strain rates in the transfer nip of film coaters, which leads under certain conditions to misting. The extensional viscosity of coating suspensions is mainly responsible for this major runnability issue. An orifice flowmeter was used for measuring the extensional properties of complex rheology fluids such as coating suspensions. The principle of this flowmeter is based on the relationship between pressure drop and the flow rate of fluid passing through a small orifice. The flowmeter was firstly calibrated in terms of a dimensionless Euler number as a function of the Reynolds number with Newtonian fluids. The corresponding curve was then used to determine the apparent extensional viscosity of coating suspensions. Results of extensional properties of paper coating suspensions are presented and compared to shear viscosity. The Trouton ratio (ratio of extensional to shear viscosity) for some coating suspensions was shown to exceed considerably the theoretical value of 3 expected for Newtonian fluids. The runnability of four coating suspensions was assessed using a pilot coater in terms of the transfer ratio and the coat weight. Results showed that a pronounced strain hardening reduces considerably the amount of misting but the drop size becomes smaller MH - Canada MH - Mexico|Distrito Federal PB - STOCKHOLM: AB SVENSK PAPPERSTIDNING RP - NOT IN FILE U3 - TC 3 U4 - Materials Science, Paper & Wood U5 - J;Article AV - English IS - 0283-2631 UR - ISI:000228457000008 L2 - misting;extensional properties;film coaters;coating suspensions;rheology;SIZE PRESS; VISCOSITY; FLOW; CONTRACTION SO - Nordic Pulp & Paper Research Journal 2005 ;20(1):48-53 13051 UI - 1567 AU - Ashtekar A AU - Bombelli L AU - Corichi A AD - Penn State Univ, Dept Phys, Inst Gravitat Phys & Geometry, University Pk, PA 16802, USAUniv Mississippi, Dept Phys & Astron, University, MS 38677, USAUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoAshtekar, A, Penn State Univ, Dept Phys, Inst Gravitat Phys & Geometry, University Pk, PA 16802 USA TI - Semiclassical states for constrained systems AB - The notion of semiclassical states is first sharpened by clarifying two issues that appear to have been overlooked in the literature. Systems with linear and quadratic constraints are then considered and the group averaging procedure is applied to kinematical coherent states to obtain physical semiclassical states. In the specific examples considered, the technique turns out to be surprisingly efficient, suggesting that it may well be possible to use kinematical structures to analyze the semiclassical behavior of physical states of an interesting class of constrained systems MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 10 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 1550-7998 UR - ISI:000230889600069 L2 - QUANTUM-GRAVITY; QUANTIZATION; TIME SO - Physical Review D 2005 ;72(2): 13052 UI - 2026 AU - Atakishiyev NM AU - Pogosyan GS AU - Wolf KB AD - Univ Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62191, Morelos, MexicoJoint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Oblast, RussiaUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoAtakishiyev, NM, Univ Nacl Autonoma Mexico, Inst Matemat, Cuernavaca 62191, Morelos, Mexico TI - Finite models of the oscillator AB - Finite oscillator models obey the same dynamics as classical and quantum oscillators, but these operators, which correspond to position, momentum, Hamiltonian, and angular momentum, are generators of the compact Lie group SO(D) and form the Lie algebra so(D). One-dimensional finite oscillators, shallow planar optical waveguides, and finite data sets are so(3) systems. Two-dimensional finite oscillators, shallow cylindrical waveguides, and pixellated screens are governed by so(4). A physical reinterpretation of the generators of these algebras as observables that take a finite number of values fits into a coherent picture of their phase space MH - Mexico|Morelos MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 1 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1063-7796 UR - ISI:000229622100001 L2 - FRACTIONAL FOURIER-TRANSFORMS; WIGNER DISTRIBUTION FUNCTION; QUANTUM-MECHANICS; CANONICAL-TRANSFORMATIONS; LIE-ALGEBRAS; 2-DIMENSIONAL OSCILLATOR; HARMONIC-OSCILLATOR; ANGLE VARIABLES; OPTICAL-SYSTEMS; STATES SO - Physics of Particles and Nuclei 2005 ;36(3):247-265 13053 UI - 2305 AU - Atakishiyev NM AU - Klimyk AU AD - UNAM, Inst Matemat, Cuernavaca, Morelos, MexicoBogolyubov Inst Theoret Phys, UA-03143 Kiev, UkraineAtakishiyev, NM, UNAM, Inst Matemat, CP 62210, Cuernavaca, Morelos, Mexico TI - On discrete q-ultraspherical polynomials and their duals AB - A special case of the big q-Jacobi polynomials P-n (x; a, b, c; q), which corresponds to a = b = -c, is shown to satisfy a discrete orthogonality relation for imaginary values of the parameter a (outside of its commonly known domain 0 < a < q(-1)). Since P-n (x; q(α), q(α), -q(α); q) tend to Gegenbauer (or ultraspherical) polynomials in the limit as q &RARR; 1, this family represents another q-extension of these classical polynomials, different from the continuous q-ultraspherical polynomials of Rogers. For a dual family with respect to the polynomials P-n (x; a, a, -a; q) (i.e., for dual discrete q-ultraspherical polynomials) we also find new orthogonality relations with extremal measures. © 2004 Elsevier Inc. All rights reserved MH - Mexico|Morelos MH - Ukraine PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000229066700017 L2 - big q-jacobi polynomials;little q-jacobi polynomials;discrete q-ultraspherical polynomials;duality;orthogonality relation;ORTHOGONAL POLYNOMIALS; JACOBI-POLYNOMIALS SO - Journal of Mathematical Analysis and Applications 2005 ;306(2):637-645 13054 UI - 1171 AU - Atzori M AU - Kanold PO AU - Pineda JC AU - Flores-Hernandez J AU - Paz RD AD - Univ Texas, Sch Behav & Brain Sci, Richardson, TX 75080, USAJohns Hopkins Univ, Blanchette Rockefeller Neurosci Inst, Rockville, MD, USAHarvard Univ, Sch Med, Dept Neurobiol, Boston, MA 02115, USACtr Invest Reg Hideyo Noguchi, Merida, VenezuelaBenemerita Univ Autonoma Puebla, Inst Fisiol, Puebla, MexicoUniv Diego, Dept Psiquiatria & Neurociencia, Portales, ChileUniv New Mexico, Sch Med, Dept Neurosci, Albuquerque, NM 87131, USAAtzori, M, Univ Texas, Sch Behav & Brain Sci, 2601 N Floyd Rd,GR41, Richardson, TX 75080 USA TI - Dopamine prevents muscarinic-induced decrease of glutamate release in the auditory cortex AB - Acetylcholine and dopamine are simultaneously released in the cortex at the occurrence of novel stimuli. In addition to a series of excitatory effects, acetylcholine decreases the release of glutamate acting on presynaptic muscarinic receptors. By recording evoked excitatory postsynaptic currents in layers II/III neurons of the auditory cortex, we found that activation of muscarinic receptors by oxotremorine reduces the amplitude of glutamatergic current (A(oxo/) A(ctr)=0.53 +/- 17) in the absence but not in the presence of dopamine (A(oxo)/A(ctr)=0.89 +/- 0.12 in 20 mu M dopamine). These data suggested that an excessive sensitivity to dopamine, such as postulated in schizophrenia, could prevent the decrease of glutamate release associated with the activation of cholinergic corticopetal nuclei. Thus, a possible mechanism of action of antipsychotic drugs could be through a depression of the glutamatergic signal in the auditory cortex. We tested the capability of haloperidol, clozapine and lamotrigine to affect glutamatergic synaptic currents and their muscarinic modulation. We found that antipsychotics not only work as dopamine receptor antagonists in re-establishing muscarinic modulation, but also directly depress glutamatergic currents. These results suggest that presynaptic modulation of glutamate release can account for a dual route of action of antipsychotic drugs. (c) 2005 IBRO. Published by Elsevier Ltd. All rights reserved MH - Chile MH - Mexico|Puebla MH - USA MH - Venezuela PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 5 U4 - Neurosciences U5 - J;Article AV - English IS - 0306-4522 UR - ISI:000231894500006 L2 - acetylcholine;patch-clamp;presynaptic;second-messenger;schizophrenia;neocortex;RAT PREFRONTAL CORTEX; PROTEIN-KINASE-A; HYDROXYLASE-IMMUNOREACTIVE FIBERS; TREATMENT-RESISTANT SCHIZOPHRENIA; EXCITATORY SYNAPTIC-TRANSMISSION; CORTICAL ACETYLCHOLINE-RELEASE; HUMAN TEMPORAL CORTEX; BASAL FOREBRAIN; PYRAMIDAL NEURONS; D2 RECEPTOR SO - Neuroscience 2005 ;134(4):1153-1165 13055 UI - 328 AU - Auger JC AU - Stout B AU - Martinez V AD - Ctr Invest Polimeros, Grp COMEX, Mexico City 11560, DF, MexicoCtr St Jerome, Inst Fresnel, UMR 6133, F-13397 Marseille, FranceAuger, JC, Ctr Invest Polimeros, Grp COMEX, Boulevar MA Camacho 138, Mexico City 11560, DF, Mexico TI - Scattering efficiency of aggregated clusters of spheres: dependence on configuration and composition AB - We study the orientation average scattering cross section of various isolated aggregates of identical spherical particles as functions of their size, optical properties, and spatial configurations. Two kinds of aggregates are studied: latex particles in water and rutile titanium dioxide pigments in a polymeric resin, with size parameters varying from 0.6 to 2.3. Calculations are performed by using a recursive centered T-matrix algorithm solution of the multiple scattering equation that we previously developed [J. Quant. Spectrose. Radiat. Transfer 79-80, 533 (2003)]. We show that for a specific size of the constituent spheres, their respective couplings apparently vanish, regardless of the aggregate configuration, and that the scattering cross section of the entire cluster behaves as if its constituents were isolated. We found that the particular radius for which this phenomenon occurs is a function of the relative refractive index of the system. We also study the correlations between the strength of the coupling among the constituent spheres, and the pseudofractal dimension of the aggregate as it varies from 1 to 30. (c) 2005 Optical Society of America MH - France MH - Mexico|Distrito Federal PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 5 U4 - Optics U5 - J;Article AV - English IS - 1084-7529 UR - ISI:000234020500014 L2 - ELECTROMAGNETIC SCATTERING; LIGHT-SCATTERING; CROSS-SECTIONS; PARTICLES; ABSORPTION SO - Journal of the Optical Society of America A-Optics Image Science and Vision 2005 ;22(12):2700-2708 13056 UI - 3441 AU - Avalos E AU - Del Rio F AU - Lago S AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City, DF, MexicoUniv Pablo Olavide, Dept Ciencias Ambientales, Seville 41013, Spaindel Rio, F, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Apdo 55534, Mexico City, DF, Mexico TI - Nonconformal interaction models and thermodynamics of polar fluids AB - In this work, we develop a simple potential model for polar molecules which represents effectively and accurately the thermodynamics of dilute gases. This potential models dipolar interactions whose nonpolar part is either spherical, as in Stockmayer (SM) molecules, or diatomic, as for 2-center Lennard-Jones molecules (2CLJ). Predictions of the second virial coefficient for SM and polar 2CLJ fluids for various dipole moments and elongations agree very well with results of recent numerical calculations by C. Vega and co-workers (Phys. Chem. Chem Phys. 2002, 4, 3000). The model is used to predict the critical temperature of Stockmayer fluids for variable dipole moment and is applied to HCl as an example of a real polar molecule MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000226213200072 L2 - ACCURATE EFFECTIVE POTENTIALS; VAPOR-LIQUID-EQUILIBRIA; 2ND VIRIAL-COEFFICIENTS; REAL FLUIDS; STOCKMAYER FLUIDS; MOLECULAR FLUIDS; CORRESPONDING-STATES; CLASSICAL FLUIDS; PHASE-BEHAVIOR; NOBLE-GASES SO - Journal of Physical Chemistry B 2005 ;109(1):508-517 13057 UI - 3118 AU - Avalos LA AU - Bustos V AU - Unac R AU - Zaera F AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Iztapalapa, MexicoUniv Nacl San Luis, Lab Ciencias Superfis & Medios Porosos, RA-5700 San Luis, ArgentinaUniv Calif Riverside, Dept Chem, Riverside, CA 92521, USAZgrablich, G, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Iztapalapa, Mexico TI - Toward a realistic model for the kinetics of the NO plus CO reaction on rhodium surfaces AB - A model for the kinetics of NO reduction by CO on Rh(1 11) surfaces is proposed that takes into account recent experimental observations 94 on the formation of an N-NO intermediate as an alternative pathway to produce N-2, the formation of N-islands in the adsorbed phase, an increase of the NO dissociation probability with the number of neighboring vacant sites, and the blocking of NO dissociation due to the presence of neighboring co-adsorbed NO and CO species. When all these characteristics are taken into account, the overall behavior of the system in steady-state conditions, calculated through Monte Carlo simulations, is consistent with experimental observations. The effect and importance of each elementary process in the reaction kinetics is discussed. (C) 2004 Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1381-1169 UR - ISI:000226962300012 L2 - NO;Monte Carlo simulations;catalyst;MONTE-CARLO-SIMULATION; SINGLE-CRYSTAL SURFACES; CATALYTIC-REDUCTION; NITRIC-OXIDE; LATTICE-GAS; RH(111) SURFACES; NITROGEN; TEMPERATURE; DECOMPOSITION; INTERMEDIATE SO - Journal of Molecular Catalysis A-Chemical 2005 ;228(1-2):89-95 13058 UI - 362 AU - Avendano CG AU - Reyes JA AU - Del Castillo-Mussot M AU - Vazquez GJ AU - Spector H AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoIIT, Dept Phys, Chicago, IL 60616, USAVazquez, GJ, Univ Nacl Autonoma Mexico, Inst Fis, Apdo Postal 20-364, Mexico City 01000, DF, Mexico TI - Stark effect on an exciton or impurity in a finite width quantum wire with an electric field confined in a finite region AB - We Study the electronic properties of a quantum system formed by two charged particles moving in a quantum wire (QW) with finite width a and interacting through a Coulomb potential under an uniform electric field E applied over a spatially confined region of thickness 2a (-a < z < a). The number of electronic states of this finite width system is twice the number of the less realistic system with sigma = 0. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000233977200025 L2 - excitons;quantum wires;Stark effect;STATES SO - Physica E-Low-Dimensional Systems & Nanostructures 2005 ;30(1-2):126-133 13059 UI - 680 AU - Avendano CG AU - Ponti S AU - Reyes JA AU - Oldano C AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoPolitecn Turin, Dipartimento Fis, I-10129 Turin, ItalyINFM, I-10129 Turin, ItalyAvendano, CG, Univ Nacl Autonoma Mexico, Inst Fis, Apdo P 20-364, Mexico City 01000, DF, Mexico TI - Multiplet structure of the defect modes in 1D helical photonic crystals with twist defects AB - We theoretically analyse the defect modes generated by equispaced twist defects in 1D helical (cholesteric-like) structures within their frequency gap which is such that only the first two of the four eigenwaves 1(+/-), 2(+/-) are exponentially attenuated. n(o) identical defects generate n(o) different defect modes, each one represented by a linear combination of the four eigenwaves. The components 1(+) and 1(-) are by far the dominant ones and they are localized near the defect planes. We give exact analytic expressions for the elements of the transfer and scattering matrices of the defect planes, for the functions defining the defect mode when n(o) = 1, and for the defect frequencies when n(o) = 1, 2, 3. In the particular case n(o) = 2 and twist angle theta = pi/2, the difference between the two defect wavelengths lambda(d2), lambda(d1) depends exponentially on the distance z(1) between the defect planes, going to zero for z(1) -> infinity and becoming as large as the entire frequency gap for z(1) -> 0 MH - Italy MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary;Physics, Mathematical U5 - J;Article AV - English IS - 0305-4470 UR - ISI:000233112500003 L2 - CHOLESTERIC LIQUID-CRYSTALS; SHEAR AXIAL MODES; SPECTRAL HOLES; PCTSCM; FILMS SO - Journal of Physics A-Mathematical and General 2005 ;38(41):8821-8840 13060 UI - 528 AU - avides-Solorio JDD AU - MacDonald LH AD - Colorado State Univ, Dept Forest Rangeland & Watershed Stewardship, Ft Collins, CO 80523, USAINIFAP, Ctr Reg Invest Pacifico Ctr, Guadalajara 44660, Jalisco, MexicoMacDonald, LH, Colorado State Univ, Dept Forest Rangeland & Watershed Stewardship, Ft Collins, CO 80523 USA TI - Measurement and prediction of post-fire erosion at the hillslope scale, Colorado Front Range AB - Post-fire soil erosion is of considerable concern because of the potential decline in site productivity and adverse effects on downstream resources. For the Colorado Front Range there is a paucity of post-fire erosion data and a corresponding lack of predictive models. This study measured hillslope-scale sediment production rates and site characteristics for three wild and three prescribed fires over two summers and one winter using 48 sediment fences. Over 90% of the sediment was generated by summer convective storms. Sediment production rates from recent, high-severity wildfires were 0.2-1.0 kg m(-2) year(-1). Mean sediment production rates from areas recently burned at moderate and low severity were only 0.02 and 0.005 kg m(-2) year(-1), respectively. For a given severity, sediment production rates from prescribed fires were generally lower than from wildfires, but there was considerable variability between plots and within fire severity classes. Fire severity, percent bare soil, rainfall erosivity, soil water repellency and soil texture explained 77% of the variability in sediment production rates, while a two-parameter model using percentage bare soil and rainfall erosivity explained 62% of the variability. Model validation confirmed the usefulness of these empirical models. The improved understanding of post-fire erosion rates can help guide forest management and post-fire rehabilitation efforts MH - USA MH - Mexico|Jalisco PB - COLLINGWOOD: C S I R O PUBLISHING RP - NOT IN FILE U3 - TC 9 U4 - Forestry U5 - J;Article AV - English IS - 1049-8001 UR - ISI:000233458700012 L2 - fire severity;forests;models;rainfall erosivity;sediment production;surface cover;SOIL LOSS EQUATION; SIMULATED RAINFALL; FOREST-FIRE; RUNOFF; SEDIMENT; WILDFIRE; PONDEROSA; HYDROPHOBICITY; PERSISTENCE; SEVERITY SO - International Journal of Wildland Fire 2005 ;14(4):457-474 13061 UI - 192 AU - Avila C AU - Lopez J AU - Sanabria JC AU - Baldazzi G AU - Bollini D AU - Gombia M AU - Cabal AE AU - Ceballos C AU - Garcia AD AU - Gambaccini M AU - Taibi A AU - Sarnelli A AU - Tuffanelli A AU - Giubellino P AU - Marzari-Chiesa A AU - Prino F AU - Tomassi E AU - Grybos P AU - Idzik M AU - Swientek K AU - Wiacek P AU - Montano LM AU - Ramello L AU - Sitta M AD - Univ Los Andes, Dept Fis, Bogota, ColombiaUniv Bologna, Dipartimento Fis, Bologna, ItalyIst Nazl Fis Nucl, I-40126 Bologna, ItalyCEADEN, Havana, CubaUniv Ferrara, Dipartimento Fis, I-44100 Ferrara, ItalyIst Nazl Fis Nucl, I-44100 Ferrara, ItalyUniv Turin, Dipartimento Fis Sperimentale, Turin, ItalyIst Nazl Fis Nucl, I-10125 Turin, ItalyAGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, PolandCINVESTAV, Mexico City 14000, DF, MexicoUniv Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Alessandria, ItalyIst Nazl Fis Nucl, Alessandria, ItalyPrino, F, Univ Los Andes, Dept Fis, Bogota, Colombia TI - Contrast cancellation technique applied to digital x-ray imaging using silicon strip detectors AB - Dual-energy mammographic imaging experimental tests have been performed using a compact dichromatic imaging system based on a conventional x-ray tube, a mosaic crystal, and a 384-strip silicon detector equipped with full-custom electronics with single photon counting capability. For simulating mammal tissue, a three-component phantom, made of Plexiglass, polyethylene, and water, has been used. Images have been collected with three different pairs of x-ray energies: 16-32 keV, 18-36 keV, and 20-40 keV. A Monte Carlo simulation of the experiment has also been carried out using the MCNP-4C transport code. The Alvarez-Macovski algorithm has been applied both to experimental and simulated data to remove the contrast between two of the phantom materials so as to enhance the visibility of the third one. (c) 2005 American Association of Physicists in Medicine MH - Colombia MH - Cuba MH - Italy MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS RP - NOT IN FILE U3 - TC 1 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0094-2405 UR - ISI:000234643700027 L2 - dual-energy x-ray imaging;mammography;silicon microstrip detectors;MCNP simulations;POSITION-SENSITIVE MEASUREMENTS; DUAL-ENERGY MAMMOGRAPHY; READOUT SYSTEM; MICROCALCIFICATIONS; RADIOGRAPHY; RESOLUTION SO - Medical Physics 2005 ;32(12):3755-3766 13062 UI - 1733 AU - Avila G AU - Dirksen RT AD - Univ Rochester, Med Ctr, Dept Physiol & Pharmacol, Rochester, NY 14642, USAInst Politecn Nacl, CINVESTAV, Dept Biochem, Mexico City 07000, DF, MexicoDirksen, RT, Univ Rochester, Med Ctr, Dept Physiol & Pharmacol, 601 Elmwood Ave, Rochester, NY 14642 USA TI - Rapamycin and FK506 reduce skeletal muscle voltage sensor expression and function AB - FK506 and rapamycin are immunosuppressant drugs that disrupt the interaction of FK506-binding proteins (FKBPs) with ryanodine receptors (RyR1), which form homotetrameric Ca2+ release channels in the sarcoplasmic reticulum (SR) of skeletal muscle. Here, we characterized the effects of short-term treatment (2 h) of skeletal myotubes with either 20 mu M FK506 or 20 mu M rapamycin on excitation-contraction (EC) coupling, sarcolemmal dihydropyridine receptor (DHPR) function, resting intracellular Ca2+, and levels of SR Ca2+ content. Both rapamycin and FK506 produced remarkably similar effects. Specifically, both drugs reduced the maximal amplitude of voltage-gated SR Ca2+ release ((Delta F/F)(max)) by 70-75% in parallel with a 50% reduction in both maximal immobilization resistant charge movement (Q(max)) and L-type Ca2+ channel conductance (G(max)). Neither immunosupressant significantly altered steady-state levels of either resting myoplasmic Ca2+ or SR Ca2+ content. Thus, store depletion does not account for the observed reduction in Ca2+ release during EC coupling. Instead, the inhibitory effect on voltage-gated SR Ca2+ release is explained by significant reductions in both the number of functional sarcolemmal voltage sensors and the intrinsic gain of voltage-gated Ca2+ release (i.e. the maximal rate of Ca2+ release per unit gating charge). (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology U5 - J;Article AV - English IS - 0143-4160 UR - ISI:000230528200004 L2 - FKBP12;immunophilins;dihydropyridine receptor;excitation-contraction coupling;CALCIUM-RELEASE CHANNEL; RYANODINE RECEPTORS; DIHYDROPYRIDINE RECEPTORS; SARCOPLASMIC-RETICULUM; FK506-BINDING PROTEIN; CA2+ CHANNEL; BINDING; SIROLIMUS; FKBP-12; DISEASE SO - Cell Calcium 2005 ;38(1):35-44 13063 UI - 1464 AU - Avila R AU - Raza SS AD - Univ Nacl Autonoma Mexico, Fac Ingn, Dept Termofluidos, Mexico City 04510, DF, MexicoPakistan Inst Nucl Sci & Technol, Nucl Engn Div, Islamabad, PakistanAvila, R, Univ Nacl Autonoma Mexico, Fac Ingn, Dept Termofluidos, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Dispersion of particles released into a neutral planetary boundary layer using a Markov chain-Monte Carlo model AB - The dispersion and concentration of particles (fluid elements) that are continuously released into a neutral planetary boundary layer is presented. The velocity fluctuations of the particles are generated using a Markov chain-Monte Carlo (MCMC) process at random time intervals with a one-step memory. The local mean concentration of the particles is calculated by using a fully Lagrangian method, which performs an efficient near-neighbor search and employs a smoothing kernel for eliminating the statistical noise. The predicted vertical and transversal root-mean-square of the particles' deviation from their mean position [((Z(2)) over bar)(1/2) and ((Y-2) over bar)(1/2)] for an elevated continuous release source in a neutral atmosphere are compared with empirical parameters like the Pasquill-Gifford sigma(z) and sigma(y). The numerical predictions of the particle concentration are compared with a Gaussian model and field measurement data on the ground concentration obtained during the Green Glow Program. The comparison between the numerical predictions and the field data shows that the MCMC model can successfully predict the particle dispersion and concentration in a neutral atmosphere MH - Mexico|Distrito Federal MH - Pakistan PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0894-8763 UR - ISI:000231221000010 L2 - ATMOSPHERIC DISPERSION; TURBULENCE CLOSURE; VELOCITY VARIANCE; STOCHASTIC-MODELS; SURFACE-LAYER; SIMULATION; TRAJECTORIES; ALGORITHMS; POLLUTANTS; ADVECTION SO - Journal of Applied Meteorology 2005 ;44(7):1106-1115 13064 UI - 2649 AU - Aviles F AU - Letley DP AU - El-Omar E AU - Torres J AU - Atherton JC AD - Univ Nottingham, Wolfson Digest Dis Ctr, Nottingham NG7 2RD, EnglandUniv Aberdeen, Dept Med & Therapeut, Aberdeen, ScotlandInst Mexicano Seguro Social, Mexico City, DF, Mexico TI - Human antibody response against the p58 subunit of the Helicobacter pylori cytotoxin: Serotyping VacA MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Gastroenterology & Hepatology U5 - J;Meeting Abstract AV - English IS - 0017-5749 UR - ISI:000227712600323 SO - Gut 2005 ;54():A84-A85 13065 UI - 3072 AU - Avonce N AU - Leyman B AU - Thevelein J AU - Iturriaga G AD - UAEM, Ctr Invest Biotecnol, Cuernavaca 62210, Morelos, MexicoKatholieke Univ Leuven, Lab Mol Celbiol, Louvain, BelgiumVlaams Interuniv Inst Biotechnol, B-3001 Louvain, BelgiumIturriaga, G, UAEM, Ctr Invest Biotecnol, Av Univ 1001,Col Champila, Cuernavaca 62210, Morelos, Mexico TI - Trehalose metabolism and glucose sensing in plants AB - Plants sense and respond to changes in carbon and nitrogen metabolites during development and growth according to the internal needs of their metabolism. Sugar-sensing allows plants to switch off photosynthesis when carbohydrates are abundant. These processes involve regulation of gene and protein activity to allow plants the efficient use of energy storage. Besides being a key element in carbon metabolism, glucose (Glc) has unravelled as a primary messenger in signal transduction. it has been proved that hexokinase (HXK) is a Glc sensor. An unusual disaccharide named trehalose is present in very low levels in most plants except for the desiccation-tolerant plants known as 'resurrection' plants where trehalose functions as an osmoprotectant. We have shown that overexpression of the Arabidopsis trehalose-6-phosphate synthase gene (AtTPS1) in Arabidopsis promotes trehalose and trehalose-6-phosphate (T6P) accumulation. Seedlings expressing AtTPS1 displayed a Glc-insensitive phenotype. Transgenic lines germinated normally on Glc, in contrast to wild-type seedlings showing growth retardation and absence of chlorophyll and root elongation. Gene-expression analysis in transgenic plants showed up-regulation of several genes involved in sugar signalling and metabolism. These data suggest that AtTPS1 and accordingly T6P and trehalose play an important role in the regulation of Glc sensing and signalling genes during plant development MH - Belgium MH - Mexico|Morelos PB - LONDON: PORTLAND PRESS LTD RP - NOT IN FILE U3 - TC 10 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0300-5127 UR - ISI:000227269800078 L2 - abscisic acid;Arabidopsis;carbohydrates;glucose sensing;hexokinase;stress tolerance;trehalose;TREHALOSE-6-PHOSPHATE SYNTHASE; ARABIDOPSIS-THALIANA; GROWTH; YEAST; GENE; BIOSYNTHESIS; HEXOKINASE; GLYCOLYSIS; TOLERANCE; TOBACCO SO - Biochemical Society Transactions 2005 ;33():276-279 13066 UI - 1386 AU - Aylor DE AU - Baltazar BM AU - Schoper JB AD - Connecticut Agr Expt Stn, Dept Plant Pathol & Ecol, New Haven, CT 06504, USAPioneer Hi Bred Int Mexico, Tapachula, Nayarit, MexicoUniv Brasilia, Pioneer Sementes Ltda, Brasilia, DF, BrazilAylor, DE, Connecticut Agr Expt Stn, Dept Plant Pathol & Ecol, New Haven, CT 06504 USA TI - Some physical properties of teosinte (Zea mays subsp parviglumis) pollen AB - In parts of the world where teosinte and maize are grown in close proximity, there is concern about gene flow between them. Pollen is the primary vehicle for gene flow. Quantifying the biophysical properties of pollen, such as its settling speed and dehydration rate, is important for evaluating outcrossing potential. These properties were measured for teosinte (Zea mays subsp. parviglumis) pollen. Pollen was found to have an average settling speed of 0.165 m s(-1), which agrees well with theoretical values based on the size of the pollen grains. The conductance of the pollen wall for water was derived from the time rate of change of pollen grain size and gave an average conductance of 3.42x10(-4) m s(-1). Water potential, psi, of teosinte pollen was determined at various values of relative water content (dry-weight basis), theta, by using a thermocouple psychrometer and by allowing samples of pollen to come to vapour equilibrium with various saturated salt solutions. Non-linear regression analysis of the data yielded psi (MPa) = -4.13 theta(-1.23) (r(2)=0.77). Results for conductance and psi were incorporated into a model equation for the rate of water loss from pollen grains, which yielded results that agreed well (r(2)=0.96) with observations of water loss from pollen grains in air. The data reported here are important building blocks in a model of teosinte pollen movement and should be helpful in establishing the main factors influencing the degree and the direction of pollination between teosinte populations and between maize and teosinte MH - Brazil MH - USA MH - Mexico|Nayarit PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000231363000010 L2 - aerial dispersal;genetically modified crops;gene-flow models;pollen viability;settling speed;survival;vapour pressure deficit;water content;water potential;Zea mays;MAIZE; MEXICO; POLLINATION; IMPROVEMENT; GERMPLASM; CHIAPAS SO - Journal of Experimental Botany 2005 ;56(419):2401-2407 13067 UI - 909 AU - az-Anzaldua A AU - Riviere J AU - Dube M AU - Joober R AU - Saint-Onge J AU - Dion Y AU - Lesperance P AU - Richer F AU - Chouinard S AU - Rouleau GA AD - Inst Nacl Psiquitria Ramon Fuente, Mexico City, DF, MexicoCtr Hosp Univ Montreal, Notre Dame Hosp, Ctr Study Brain Dis, Montreal, PQ, CanadaMontreal Heart Inst, Res Ctr, Montreal, PQ, CanadaUniv Montreal, Montreal, PQ H3C 3J7, CanadaDouglas Hosp, Res Ctr, Verdun, PQ H4H 1R3, CanadaSt Justine Hosp, Montreal, PQ, Canada TI - Chromosome 11-q24 region in Tourette syndrome: Association and linkage disequilibrium study in the French Canadian population MH - Canada MH - Mexico|Distrito Federal PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 1552-4841 UR - ISI:000232357300095 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2005 ;138B(1):28-29 13068 UI - 1051 AU - az-Anzaldua A AU - Riviere JB AU - Dube MP AU - Joober R AU - Saint-Onge J AU - Dion Y AU - Lesperance P AU - Richer F AU - Chouinard S AU - Rouleau GA AD - Univ Montreal, Ctr Hosp, Montreal, PQ, CanadaInst Nacl Pesquiatria Ramon Fuente, Mexico City, DF, MexicoRes Ctr, Montreal Heart Inst, Montreal, PQ H1T 1C8, CanadaDouglas Hosp, Res Ctr, Montreal, PQ, CanadaMcGill Univ, Ctr Hlth, Montreal, PQ, CanadaSt Justine Hosp, Montreal, PQ, CanadaRouleau, GA, CHUM, Res Ctr, Ctr Study Brain Dis, Notre Dame Hosp, JA Seve Pavill,Room Y-3633,1560 Sherbrooke St E, Montreal, PQ H2L 4M1, Canada TI - Chromosome 11-q24 region in Tourette syndrome: Association and linkage disequilibrium study in the French Canadian population AB - Previous studies have found association and linkage between Tourette syndrome (TS) and markers at the 11q24 region, mainly with markers D11S1377 and D11S933. In order to determine if these positive findings could be replicated in our sample, we undertook a family-based association study in 199 French Canadian TS nuclear families. We genotyped 572 individuals from 174 complete and 25 incomplete TS trios. TDT analysis failed to detect an association between TS and six markers from 11q24. Furthermore, no haplotype combining alleles from D11S1377, D11S933, or any of the other four markers was associated with the disorder. Linkage disequilibrium. analysis showed evidence of historical recombination between every contiguous pair of markers, indicating that these genetic variants are probably in equilibrium in the French Canadian population. Further analysis in additional families, with different methodologies (linkage and association) will be required in order to determine if the 11q24 region harbors a susceptibility locus for TS. If it does, this defect may not be frequent in the French Canadian population due to locus heterogeneity. (c) 2005 Wiley-Liss, Inc MH - Canada MH - Mexico|Distrito Federal PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 1552-4825 UR - ISI:000232239300006 L2 - Tourette syndrome;tics;obsessive-compulsive disorder;attention deficit disorder with hyperactivity;linkage disequilibrium;founder effect;RECEPTOR LOCUS; SUSCEPTIBILITY; FAMILY; GENES; D4 SO - American Journal of Medical Genetics Part A 2005 ;138A(3):225-228 13069 UI - 32 AU - az-Arista P AU - ntano-Lopez R AU - Meas Y AU - Ortega R AU - Chainet E AU - Ozil P AU - Trejo G AD - CIDETEQ, Queretaro 76700, MexicoENSEEG, LEPMI, F-38402 St Martin Dheres, FranceTrejo, G, CIDETEQ, Parque Tecnol Sanfandila,Pedro Escobedo,AP 064, Queretaro 76700, Mexico TI - EQCM study of the electrodeposition of manganese in the presence of ammonium thiocyanate in chloride-based acidic solutions AB - The influence of ammonium thiocyanate (NH4SCN) on the mechanism of manganese electrodeposition from a chloride-based acidic solution was investigated by cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM). The EQCM data were represented as plots d Delta m dt(-1) versus E, known as massograms. Because massograms are not affected by interference from the hydrogen evolution reaction, they clearly show the manganese reduction and oxidation processes. By comparing the voltammograms with their corresponding massograms, it was possible to differentiate mass changes due to faradaic processes from those due to non-faradaic processes. Morphology, chemical composition and structure of the manganese deposits formed in different potential ranges were analyzed by scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD). The results showed that in the absence of NH4SCN, Mn(OH)(2(s)) is formed in the potential range -1.1 to -0.9 V due to the hydrogen evolution reaction in this region. At more cathodic potentials, the deposition of beta-manganese and the inclusion of Mn(OH)2(5) into the deposit occur; both of these species underwent dissolution by non-faradaic processes during the anodic scan. In the presence of NH4SCN, the formation of alpha- and gamma-manganese was observed. When the potential was <=-1.8 V and [NH4SCN] exceeded 0.3 M, the ox-manganese phase was favored. (c) 2005 Elsevier Ltd. All rights reserved MH - France MH - Mexico|Queretaro PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000238243800008 L2 - electrodeposition;electrochemical quartz crystal microbalance;massograms;manganese;QUARTZ-CRYSTAL MICROBALANCE; ZN-MN ALLOYS; ELECTROCHEMICAL NUCLEATION; CONDENSED PHASES; GOLD ELECTRODES; DOUBLE-LAYER; ELECTROLYTES; EQUILIBRIA; COATINGS; METAL SO - Electrochimica Acta 2005 ;51(21):4393-4404 13070 UI - 445 AU - az-Calleja R AU - Garcia-Bernabe A AU - Sanchis MJ AU - del Castillo LF AD - Univ Politecn Valencia, Dept Termodinam Aplicada, E-46071 Valencia, SpainUNAM, Inst Invest Mat, Mexico City 04510, DF, MexicoDiaz-Calleja, R, Univ Politecn Valencia, Dept Termodinam Aplicada, E-46071 Valencia, Spain TI - Interconversion of mechanical and dielectrical relaxation measurements for dicyclohexylmethyl-2-methyl succinate AB - A comparison between results of dielectrical relaxation and dynamic mechanical spectroscopies is carried out for the alpha-relaxation of the ester dicyclohexyl methyl-2-methyl succinate (DCMMS). The results for the dielectric permittivity and the shear modulus measurements are presented according to the empirical Havriliak-Negami (HN) equation. By using the time-temperature principle a master curve in each case was obtained for several temperatures. The comparative analysis presented here is based on the assumption of a relationship between rotational and shear viscosities. The former one is associated to the dielectrical relaxation, whereas the latter is associated to mechanical relaxation. Both viscosities are not necessarily equal in general, and we assume that the difference between them is an important factor to appropriately compare the dielectrical and mechanical results MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1539-3755 UR - ISI:000233603100024 L2 - SPATIALLY HETEROGENEOUS DYNAMICS; SUPERCOOLED LIQUIDS; ROTATIONAL DIFFUSION; GLASS-TRANSITION; MEMORY FUNCTION; FREQUENCY; POLYMERS; FORMERS SO - Physical Review e 2005 ;72(5): 13071 UI - 2933 AU - az-Camino C AU - Conde R AU - Ovsenek N AU - Villanueva MA AD - UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62250, Morelos, MexicoUniv Saskatchewan, Coll Med, Dept Anat & Cell Biol, Saskatoon, SK S7N 5E5, CanadaVillanueva, MA, UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Apartado Postal 510-3, Cuernavaca 62250, Morelos, Mexico TI - Actin expression is induced and three isoforms are differentially expressed during germination in Zea mays AB - Previous analysis of actin in a dicotyledonous plant, Phaseolus vulgaris (or common bean), showed very low actin levels in cotyledons but they were concentrated in the embryo axis. Upon imbibition, actin expression increased 5-fold and a maximum of four actin isoforms were observed, two of them transient and two major ones were steadily expressed. In this work, analysis of the actin expression in a monocotyledonous plant, Zea mays(or maize), and over a longer period of germination/ growth, showed that striking similarities exist. Actin is present in all the seed components, but it is mainly concentrated in the embryo axis. The expression of maize actin was induced during post-imbibition at both the protein and mRNA levels. Sharp increases in actin appeared from 24-48 h and again from 72-96 h. A more modest and steady actin mRNA increase in expression was observed; however, it did not appear as dramatic as in the case of common bean due to the presence of readily detectable amounts of message in the dry maize seed. The isoform distribution in the dry seed showed a pattern of at least three isovariants of pis similar to 5.0, 5.1, and 5.2, which were differentially expressed at the various post-imbibition times analysed. Two of the actin isoforms at 48 h post-imbibition cross-reacted with a phosphotyrosine-specific antibody and they are the product of three expressed genes as shown by in vitro translation assays. These data indicate that maize actin protein and mRNA expression is induced upon the trigger of germination, and the isoform expression kinetics and patterns resemble those from bean, suggesting that, in both species, actin expression at these early germination/ growth stages is a highly regulated event MH - Canada MH - Mexico|Morelos PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences U5 - J;Article AV - English IS - 0022-0957 UR - ISI:000227437500007 L2 - actin;germination;isoforms;phosphorylation;seeds;Z mays;PHASEOLUS-VULGARIS L; TYROSINE PHOSPHORYLATION; TIP GROWTH; IN-VIVO; PLANT; ROOT; CELLS; CYTOSKELETON; POLLEN; GENE SO - Journal of Experimental Botany 2005 ;56(412):557-565 13072 UI - 1293 AU - az-Cruz JL AU - Ferrandis J AD - Cuerpo Acad Particulas, Campos & Relat FCFM, Puebla 72000, MexicoLawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720, USADiaz-Cruz, JL, Cuerpo Acad Particulas, Campos & Relat FCFM, Ap Postal 1364, Puebla 72000, Mexico TI - Solving the supersymmetric CP problem with flavor breaking F terms AB - Supersymmetric flavor models for the radiative generation of fermion masses offer an alternative way to solve the SUSY-CP problem. We assume that the supersymmetric theory is flavor and CP conserving. CP violating phases are associated to the vacuum expectation values of flavor violating SUSY-breaking fields. As a consequence, phases appear at tree level only in the soft supersymmetry-breaking matrices. Using a U(2) flavor model as an example we show that it is possible to generate radiatively the first and second generation of quark masses and mixings as well as the Cabibbo-Kobayashi-Maskawa (CKM) CP phase. The one-loop supersymmetric contributions to electric dipole moments are automatically zero since all the relevant parameters in the Lagrangian are flavor conserving and as a consequence real. The size of the flavor and CP mixing in the SUSY-breaking sector is mostly determined by the fermion mass ratios and CKM elements. We calculate the contributions to epsilon, epsilon(') and to the CP asymmetries in the B decays to psi K-s, phi K-s, eta(')K(s) and X(s)gamma. We analyze a case study with maximal predictivity in the fermion sector. For this worst case scenario the measurements of Delta m(K), Delta m(B) and epsilon constrain the model requiring extremely heavy squark spectra MH - Mexico|Puebla MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Review AV - English IS - 1550-7998 UR - ISI:000231564900075 L2 - ELECTRIC-DIPOLE MOMENTS; RADIATIVE FERMION MASSES; LARGE TAN-BETA; B-MESON DECAY; PI-PI DECAYS; X-S-GAMMA; STANDARD MODEL; QCD FACTORIZATION; SPLIT SUPERSYMMETRY; CHARGINO CONTRIBUTIONS SO - Physical Review D 2005 ;72(3): 13073 UI - 359 AU - az-Garcia JA AU - Gutierrez-Jaimez R AD - Univ Auton Agraria Antonio Narro, Dept Stat & Computat, Saltillo 25315, Coahuila, MexicoUniv Granada, Dept Stat & Operat Res, Granada, SpainDiaz-Garcia, JA, Univ Auton Agraria Antonio Narro, Dept Stat & Computat, Saltillo 25315, Coahuila, Mexico TI - Functions of singular random matrices with applications AB - This article describes how the Jacobian is found for certain functions of a singular random matrix, both in the general case and in that of a non-negative definite random matrix. The Jacobian of the transformation V = S-2 is found when S is non-negative definite; in addition, the Jacobian of the transformation Y = X+ is determined when X+ is the generalized, or Moore-Penrose, inverse of X. Expressions for the densities of the generalized inverse of the central beta and F singular random matrices are proposed. Finally, two applications in the field of Bayesian inference are presented MH - Mexico|Coahuila MH - Spain PB - MADRID: SOCIEDAD ESTADISTICA INVESTIGACION OPERATIVA RP - NOT IN FILE U3 - TC 1 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1133-0686 UR - ISI:000233983300008 L2 - matrix-variate inverse beta and F distributions;Jacobian;Hausdorff measure;inverse singular distribution;inverse Wishart and pseudo-Wishart singular distributions;Bayesian inference;MULTIVARIATE BETA-DISTRIBUTIONS; WISHART; INVERSE SO - Test 2005 ;14(2):475-487 13074 UI - 2074 AU - az-Garcia JA AU - Ramos-Quiroga R AU - Cabrera-Vicencio E AD - Univ Autonoma Agraria Antonio Narro, Dept Stat & Computat, Saltillo 25350, Coahuila, MexicoCtr Invest Matemat AC, Guanajuato 36240, MexicoUniv Valparaiso, Dept Stat, Valparaiso, ChileDiaz-Garcia, JA, Univ Autonoma Agraria Antonio Narro, Dept Stat & Computat, Saltillo 25350, Coahuila, Mexico TI - Stochastic programming methods in the response surface methodology AB - Considering the minimisation of an estimated second degree polynomial response surface model as a problem of stochastic programming, this article establishes the equivalent deterministic programs applying the so called E-model, V-model, P-model and minimax methods. Similarly, after observing that some of the solutions by the techniques of stochastic programming coincide with the solution of a multiobjective optimisation problem, this paper proposes two alternative methods for the solution of the stochastic optimisation of a second degree polynomial response surface model: (i) A lexicographic method, and (ii) A method based on distances. An example is solved by means of the described techniques. (c) 2004 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|Coahuila MH - Mexico|Guanajuato PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Interdisciplinary Applications;Statistics & Probability U5 - J;Article AV - English IS - 0167-9473 UR - ISI:000229728900013 L2 - stochastic programming;optimum conditions;response surfaces;minimax approach;E-model;V-model;P-model;multiobjective optimisation;OPTIMIZATION SO - Computational Statistics & Data Analysis 2005 ;49(3):837-848 13075 UI - 3795 AU - az-Garcia JA AU - Leiva-Sanchez V AD - Univ Autonoma Agr Antonio Narro, Dept Estadist & Calculo, Saltillo, Coahuila, MexicoUniv Valparaiso, Dept Estadist, Valparaiso, ChileDiaz-Garcia, JA, Univ Autonoma Agr Antonio Narro, Dept Estadist & Calculo, 25350 Buenavista, Saltillo, Coahuila, Mexico TI - A new family of life distributions based on the elliptically contoured distributions AB - In this article we propose a new family of life distributions, generated from an elliptically contoured distribution, in which the density and some of its properties are obtained. Explicit expressions for the density are found for a large number of specific elliptical distributions, such as Pearson type VII, t, Cauchy, Kotz type, normal, Bessel, Laplace and logistic. (C) 2003 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|Coahuila PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 8 U4 - Statistics & Probability U5 - J;Article AV - English IS - 0378-3758 UR - ISI:000225335800008 L2 - Birnbaum-Saunders distribution;life distributions;reliability analysis;elliptical distributions;MODELS SO - Journal of Statistical Planning and Inference 2005 ;128(2):445-457 13076 UI - 321 AU - az-Ortiz A AU - guilera-Granja F AU - Michaelian K AU - Berlanga-Ramirez EO AU - Montejano-Carrizales JM AU - Vega A AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi 78000, SLP, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Valladolid, Dept Fis Teor Atom & Opt, E-47005 Valladolid, SpainDiaz-Ortiz, A, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - Tight-binding and evolutionary search approach for nanoscale CoRh alloys AB - The dependence of the structural and magnetic properties of Co-Rh alloys at the nanoscale was investigated by exhaustively searching the minimum energy via a symbiotic algorithm on a Gupta potential for particle sizes of 13, 19, and 23 atoms. An unrestricted spd tight-binding Hamiltonian was then used to model the electronic properties. Our results underscore the importance of determining both the geometrical and the chemical configuration. A central result points toward a surface segregation that qualitatively and quantitatively depends on system size, with size effects dominating the surface segregation for small Co-Rh clusters (Rh atoms preferentially occupy surface sites), whereas surface energy dictates the segregation for large Co-Rh nanoparticles (Co segregates to the surface). This might have important consequences for heterogeneous catalysis, where the catalytic activity strongly depends on surface composition. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000234057800028 L2 - nanostructures;magnetism;structure;MAGNETIC-PROPERTIES; GENETIC ALGORITHMS; RHODIUM CLUSTERS; NICKEL CLUSTERS; AG(001) SURFACE; 4D CLUSTERS; RH CLUSTERS; PARTICLES; MOMENTS; COBALT SO - Physica B-Condensed Matter 2005 ;370(1-4):200-214 13077 UI - 481 AU - az-Valencia JD AU - maraz-Barrera MD AU - rias-Romero LE AU - Hernandez-Rivas R AU - Rojo-Dominguez A AU - Guillen N AU - Vargas M AD - IPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Area Biofis Quim, Dept Quim, Mexico City, DF, MexicoInst Pasteur, INSERM, U389, Unite Biol Cellulaire Parasitisme, Paris 15, FranceVargas, M, IPN, Ctr Invest & Estudios Avanzados, Dept Biomed Mol, Mexico City, DF, Mexico TI - The ABP-120 C-end region from Entamoeba histolytica interacts with sulfatide, a new lipid target AB - EhABP-120 is the first filamin identified in the parasitic protozoan Entamoeba histolytica. Filamins area family of cross-linking actin-binding proteins that promote a dynamic orthogonal web. They have been reported to interact directly with more than 30 cellular proteins and some phosphoinositides. The biochemical consequences of these interactions may have either positive or negative effects oil the cross-linking function and also form a link between the cytoskeleton and plasma membrane. In this study, the EhABP-120 carboxy-terminal domain (END) was biochemically characterized. This domain was able to associate to 3-sulfate galactosyl ceramide, a new lipid target for a member of the filamin family. Also, the END domain was able to dimerize "in vitro." Molecular modeling analysis showed that the dimeric region is stabilized by a disulfide bond. Electrostatic and docking studies suggest that an electropositive concave pocket at the dimeric END domain interacts simultaneously with several sulfogalactose moieties of the sulfatide. (c) 2005 Elsevier Inc. All rights reserved MH - France MH - Mexico|Distrito Federal PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0006-291X UR - ISI:000233710100029 L2 - ABP-120;filamin;Entamoeba histolytica;sulfatide;glycolipid;lipid;dimer;molecular modeling;BINDING PROTEIN ABP-280; VON-WILLEBRAND-FACTOR; PERIVENTRICULAR HETEROTOPIA; PHOSPHOLIPID-COMPOSITION; STRUCTURAL BASIS; FILAMIN-A; DIMERIZATION; GLYCOLIPIDS; MUTATIONS; DOMAIN SO - Biochemical and Biophysical Research Communications 2005 ;338(3):1527-1536 13078 UI - 2655 AU - Azorin J AU - Rivera T AU - Furetta C AU - Sanchez-Rodriguez A AD - Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoIPN, Escuela Super Ingn Mecan & Electr, Mexico City 04510, DF, MexicoUniv Roma La Sapienza, I-0068 Rome, ItalyAzorin, J, Univ Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, Mexico TI - Ultraviolet induced thermoluminescence in gadolinium-doped zirconium oxide films AB - This paper presents the results of studying the thermoluminescent (TL) characteristics of Gadolinium-doped Zirconium oxide (ZrO2:Gd) films. Samples were prepared by the spray pyrolisis method depositing them on different substrates using various concentrations of the dopant and exposing to UV radiation of different wavelengths in the range from 200 to 330 nm. Optimum concentration of the dopant determined on the base of maximum TL response was 12% when films were exposed to 260 nm UV light. At these conditions, ZrO2:Gd films presented a glow curve exhibiting two peaks at 110 degrees C and 290 degrees C, a broad range linear TL response as a function of spectral irradiance and a fading of the order of 11% in a week. No significant differences were observed in the TL characteristics of the films deposited on quartz or glass substrates. These results suggest that ZrO2:Gd films could be used in UV radiation measurement MH - Italy MH - Mexico|Distrito Federal PB - ZURICH-UETIKON: TRANS TECH PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary U5 - S;Article AV - English IS - 0255-5476 UR - ISI:000228157300022 L2 - thermoluminescence;zirconium oxide;UV radiation;THIN-FILMS SO - Cross-Disciplinary Applied Research in Materials Science and Technology 2005 ;480-481():145-148 13079 UI - 843 AU - Babu R AU - Nair SK AU - Kumar A AU - Venkatesh S AU - Sekhar JC AU - Singh NN AU - Srinivasan G AU - Gupta HS AD - Vivekananda Inst Hill Agr ICAR, Almora 263601, Uttaranchal, IndiaDirectorate Maize Res, Hyderabad, Andhra Pradesh, IndiaDirectorate Maize Res, New Delhi 110012, IndiaInt Ctr Wheat & Maize Res CIMMYT, Mexico City 06600, DF, MexicoBabu, R, Vivekananda Inst Hill Agr ICAR, Almora 263601, Uttaranchal, India TI - Two-generation marker-aided backcrossing for rapid conversion of normal maize lines to quality protein maize (QPM) AB - The low nutritive value of maize endosperm protein is genetically corrected in quality protein maize (QPM), which contains the opaque2 gene along with numerous modifiers for kernel hardness. We report here a two generation marker-based backcross breeding program for incorporation of the opaque2 gene along with phenotypic selection for kernel modification in the background of an early maturing normal maize inbred line, V25. Using the flanking marker distances from opaque2 gene in the cross V25xCML176, optimum population size for the BC2 generation was computed in such a way that at least one double recombinant could be obtained. Whole genome background selection in the BC2 generation identified three plants with 93 to 96% recurrent parent genome content. The three BC2F2 families derived from marker identified BC2 individuals were subjected to foreground selection and phenotypic selection for kernel modification. The tryptophan concentration in endosperm protein was significantly enhanced in all the three classes of kernel modification viz., less than 25%, 25-50% and more than 50% opaqueness. BC2F3 lines developed from the hard endosperm kernels were evaluated for desirable agronomic and biochemical traits in replicated trials and the best line was chosen to represent the QPM version of V25, with tryptophan concentration of 0.85% in protein. The integrated breeding strategy reported here can be applied to reduce genetic drag as well as the time involved in a conventional line conversion program, and would prove valuable in rapid development of specialty corn germplasm MH - India MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000232598600010 L2 - BREEDING PROGRAMS; COMBINING ABILITY; GENE INTROGRESSION; OPAQUE-2 ENCODES; DNA; DISCRIMINATION; STRATEGIES; HETEROSIS; GERMPLASM; SELECTION SO - Theoretical and Applied Genetics 2005 ;111(5):888-897 13080 UI - 2697 AU - Baez-Gonzalez AD AU - Kiniry JR AU - Maas SJ AU - Tiscareno M AU - Macias J AU - Mendoza JL AU - Richardson CW AU - Salinas J AU - Manjarrez JR AD - INIFAP, Lab Nacl Modelaje & Sensores Remotos, Aguascalientes 20660, MexicoUSDA ARS, Grassland Soil & Water Res Lab, Temple, TX 76502, USATexas Tech Univ, Dept Plant & Soil Sci, Lubbock, TX 79415, USAINIFAP, Guasave Sinaloa 81200, MexicoINIFAP, Rio Bravo 88900, Tamaulipas, MexicoBaez-Gonzalez, AD, INIFAP, Lab Nacl Modelaje & Sensores Remotos, Km 32-5 Carr,Aguascalientes Zacatecas,Ap Postal, Aguascalientes 20660, Mexico TI - Large-area maize yield forecasting using leaf area index based yield model AB - Large-area yield prediction early in the growing season is important in agricultural decision-making. This study derived maize (Zea mays L.) leaf area index (LAI) estimates from spectral data and used these estimates with a simple LAI-based yield model to forecast yield under irrigated conditions in large areas in Sinaloa, Mexico. Leaf area index was derived from satellite data with the use of an equation developed with LAI measurements from farmers' fields during the 2001-2002 autumn-winter growing season. These measurements were correlated with the normalized difference vegetation index values from 2002 Landsat ETM+ (enhanced thematic mapper) data. The equation was then tested with 2003 Landsat imagery data. A yield model was validated with maximum LAI and yield data measured in farmers' fields in northern and central Sinaloa during three consecutive autumn-winter growing seasons (1999-2000, 2000-2001, and 2001-2002). The yield model was further validated with 2002-2003 autumn-winter ground LAI (gLAI) and satellite-derived LAI (sLAI) data from 71 farmers' fields in northern and central Sinaloa. Grain yield was predicted with a mean error of -9.2% with maximum gLAI and -11.2% with sLAL Results indicate that the yield model using LAI can forecast yield in large areas in Sinaloa in the middle of the growing season with a mean absolute error of -1.2 Mg ha(-1). The use of sLAI in place of ground measurements increased the mean absolute error by 0.3 Mg ha(-1). Nevertheless, the use of sLAI would eliminate laborious LAI measurements for large-area yield prediction in Sinaloa MH - Mexico|Aguascalientes MH - Mexico|Sinaloa MH - Mexico|Tamaulipas MH - USA PB - MADISON: AMER SOC AGRONOMY RP - NOT IN FILE U3 - TC 4 U4 - Agronomy U5 - J;Article AV - English IS - 0002-1962 UR - ISI:000228037700010 L2 - SPECTRAL VEGETATION INDEXES; DRY-MATTER PRODUCTION; SEMIARID MEXICO; SATELLITE DATA; PEARL-MILLET; CROP MODELS; LANDSAT; WHEAT; CORN; TM SO - Agronomy Journal 2005 ;97(2):418-425 13081 UI - 2925 AU - Baez JE AU - Martinez-Richa A AU - Marcos-Fernandez A AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoCSIC, Inst Ciencia & Tecnol Polimeros, Dept Quim & Tecnol Elastomeros, E-28006 Madrid, SpainMartinez-Richa, A, Univ Guanajuato, Fac Quim, Noria Alta S-N, Guanajuato 36050, Mexico TI - One-step route to alpha-hydroxyl-omega-(carboxylic acid) polylactones using catalysis by decamolybdate anion AB - Asymmetric telechelic alpha-hydroxyl-omega-(carboxylic acid) poly(epsilon-caprolactone) (HA-PCL) and alpha-hydroxyl-omega-(carboxylic acid) poly(delta-valerolactone) (HA-PVL) were synthesized by ring-opening polymerization of c-caprolactone (CL) and delta-valerolactone (VL), respectively. HA-PCL oligomers were obtained at 150 degreesC in 2 h using ammonium decamolybdate (NH4)(8)[Mo10O34] as catalyst and water as initiator. A control of the number-average molecular weight (measured by NMR) can be achieved in the range between 212 and 2198 Da, based on the initial monomer/initiator ratio. Number-average molecular weight (M-n) shows a linear dependence with CL/H2O ratio in this range. The nature of hydroxyl and carboxylic acid end groups of HA-PCL and HA-PVL was studied by MALDI-TOF and H-1 and C-13 NMR. Changes in the chemical shifts observed in the NMR spectra as a function of molecular weight were explained in terms of hydrophobic interactions. Formation of macrocyclic species was studied by MALDI-TOF. It was found that macrocyclic species are favored at longer reaction times. Insertion of alcohols and polycondensation reactions occurring after complete monomer conversion were also studied. Alcohol insertion for this system depends on the nature of alcohol. Polycondensation reactions vary with reaction times and affect the polymer molecular weight in a nonlinear manner. Finally, the alpha-hydroxyl-omega-(sodium carboxylate) PCL salt (HC-PCL) was prepared from HA-PCL and characterized by FT-IR and solution and solid-state NMR. Important differences between CP-MAS and MAS spectra are observed and discussed in terms of morphology and polarization transfer MH - Mexico|Guanajuato MH - Spain PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0024-9297 UR - ISI:000227448200014 L2 - RING-OPENING POLYMERIZATION; EPSILON-CAPROLACTONE; L-LACTIDE; POLY(EPSILON-CAPROLACTONE); LACTONES; MECHANISM; BIODEGRADATION; INITIATORS; ALKOXIDES; VERSATILE SO - Macromolecules 2005 ;38(5):1599-1608 13082 UI - 592 AU - Bagatellla-Flores N AU - Schiessel H AU - Gelbart WM AD - Leiden Univ, Inst Lorentz, NL-2300 RA Leiden, NetherlandsUniv Veracruzana, Fac Fis & Inteligencia Artificial, Xalapa 91000, Veracruz, MexicoUniv Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095, USASchiessel, H, Leiden Univ, Inst Lorentz, POB 9506, NL-2300 RA Leiden, Netherlands TI - Statics and dynamics of polymer-wrapped colloids AB - We study the complex between a colloidal particle and a semiflexible polymer chain that "wraps" around it. Via molecular dynamics simulation we investigate statistical and dynamical properties of this system. First we establish the dependence of wrapped chain length on absorption energy and chain persistence length and obtain the distribution of wrapped-sphere positions. Then we Study the length and position distributions of thermally excited loop defects. Finally we consider the repositioning dynamics of the colloid, focusing on the case where the chain stays wrapped onto the complex. Specifically we determine the mean square displacement of the central monomer of the wrapped chain and the resulting diffusion coefficient of the chain as a function of its persistence length, absorption energy, chain length, and size of the sphere. We argue that both statics and dynamics of these complexes can be mainly understood by energetic arguments, whereas entropic contributions from the chain configurations play only a minor role MH - Mexico|Veracruz MH - Netherlands MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000233280600011 L2 - MONTE-CARLO SIMULATIONS; OPPOSITELY CHARGED POLYELECTROLYTE; POLYION-MACROION COMPLEXES; NUCLEOSOME CORE PARTICLE; SYNTHETIC DNA LIGANDS; ADSORPTION; CHAINS; MICELLES SO - Journal of Physical Chemistry B 2005 ;109(45):21305-21312 13083 UI - 2710 AU - Bagdany M AU - Batista CVF AU - Valdez-Cruz NA AU - Somodi A AU - de la Vega RCR AU - Licea AF AU - Varga Z AU - Gaspar R AU - Possani LD AU - Panyi G AD - Debrecen Univ Med, Dept Biophys & Cell Biol, Med & Hlth Sci Ctr, H-4012 Debrecen, HungaryNatl Autonomous Univ Mexico, Dept Mol Med & Bioproc, Inst Biotechnol, Cuernavaca, Morelos, MexicoCtr Invest Cient & Educ Ensenada, Lab Mol Immunol & Biotoxins, Ensenada, Baja California, MexicoPanyi, G, Debrecen Univ Med, Dept Biophys & Cell Biol, Med & Hlth Sci Ctr, 98 Nagyerdei Krt, H-4012 Debrecen, Hungary TI - Anuroctoxin, a new scorpion toxin of the alpha-KTx 6 subfamily, is highly selective for Kv1.3 over IKCa1 ion channels of human T lymphocytes AB - The physiological function of T lymphocytes can be modulated selectively by peptide toxins acting on Kv1.3 K+ channels. Because Kv1.3-specific peptide toxins are considered to have a significant therapeutic potential in the treatment of autoimmune diseases, the discovery of new toxins is highly motivated. Through chromatographic procedures and electrophysiological assays, using patch-clamp methodology, the isolation of a novel peptide named anuroctoxin was accomplished using the venom of the Mexican scorpion Anuroctonus phaiodactylus. It has 35 amino acid residues with a molecular weight of 4082.8, tightly bound by four disulfide bridges whose complete covalent structure was determined. It has a pyroglutamic acid at the N-terminal region and an amidated C-terminal residue. Sequence comparison and phylogenetic clustering analysis classifies anuroctoxin into subfamily 6 of the alpha-KTx scorpion toxins (systematic name, alpha-KTx 6.12). Patch-clamp experiments show that anuroctoxin is a high-affinity blocker of Kv1.3 channels of human T lymphocytes with a K-d of 0.73 nM, and it does not block the Ca2+-activated IKCa1 K+ channels. These two channels play different but important roles in T-lymphocyte activation. Furthermore, the toxin practically does not inhibit Shaker IR, mKv1.1, and rKv2.1 channels, whereas the affinity of anuroctoxin for hKv1.2 is almost an order of magnitude smaller than for Kv1.3. The pharmacological profile and the selectivity of this new toxin for Kv1.3 over IKCa1 may provide an important tool for the modulation of the immune system, especially in cases in which selective inhibition of Kv1.3 is required MH - Hungary MH - Mexico|Baja California MH - Mexico|Morelos PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 12 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0026-895X UR - ISI:000227805800009 L2 - GATED K+ CHANNELS; POTASSIUM CHANNELS; CENTRAL MEMORY; HIGH-AFFINITY; CHARYBDOTOXIN; BINDING; VENOM; PHARMACOLOGY; EXPRESSION; GENERATION SO - Molecular Pharmacology 2005 ;67(4):1034-1044 13084 UI - 2361 AU - Bagnoli F AU - Franci F AU - Rechtman R AD - Univ Florence, Dipartimento Energet, I-50139 Florence, ItalyUniv Florence, Dipartimento Matemat Applicata, I-50139 Florence, ItalyUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, MexicoUniv Florence, Ist Nazl Fis Nucl, Sez Firenze, Florence, ItalyUniv Florence, Ctr Interdipartimentale Studio Dinam Complesse, Florence, ItalyBagnoli, F, Univ Florence, Dipartimento Energet, Via S Marta 3, I-50139 Florence, Italy TI - Phase transitions of extended-range probabilistic cellular automata with two absorbing states AB - We study phase transitions in a long-range one-dimensional cellular automaton with two symmetric absorbing states. It includes and extends several other models, like the Ising and Domany-Kinzel ones. It is characterized by competing ferromagnetic linear and antiferromagnetic nonlinear couplings. Despite its simplicity, this model exhibits an extremely rich phase diagram. We present numerical results and mean-field approximations MH - Italy MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000228752500016 L2 - DAMAGE-SPREADING TRANSITIONS; DIRECTED PERCOLATION; LYAPUNOV EXPONENTS; MODELS; UNIVERSALITY SO - Physical Review e 2005 ;71(4): 13085 UI - 540 AU - Bai DS AU - Bailey JN AU - Alonso ME AU - Medina MT AU - Martinez-Juarez I AU - Duron RM AU - Tanaka M AU - Cordova S AU - Rasmussen A AU - Ramos-Peek J AU - Ochoa A AU - Jara A AU - Donnadieu FR AU - Suzuli T AU - Yamakawa K AU - gado-Escueta AV AD - Univ Calif Los Angeles, CEP, Epilesy Genet Gen Lab, Los Angeles, CA, USAGLAHS, Los Angeles, CA, USAUniv Calif Los Angeles, Inst Neuropsychiat, Mexico City, DF, MexicoNatl Inst Mexico, Mexico City, DF, MexicoNatl Autonomous Univ, Tegucigalpa, HondurasRIKEN, Neurogenet Lab, Inst Phys & Chem Res, Tokyo, Japan TI - An association study on juvenile myoclonic epilepsy and EFHC1 polymorphisms MH - Honduras MH - Japan MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000232540101448 SO - Epilepsia 2005 ;46():365-365 13086 UI - 930 AU - Baig S AU - Damian RT AU - Molinari JL AU - Tato P AU - Morales-Montor J AU - Welch M AU - Talhouk J AU - Hashmey R AU - White AC AD - Baylor Coll Med, Infect Dis Sect, Dept Med, Houston, TX 77030, USAUniv Georgia, Dept Cellular Biol, Athens, GA 30603, USANatl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Mol Genet, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Invest Biomed, Dept Immunol, Mexico City 04510, DF, MexicoEnzyme Syst Prod, Livermore, CA, USAWhite, AC, Baylor Coll Med, Infect Dis Sect, Dept Med, 1 Baylor Pl,535EA, Houston, TX 77030 USA TI - Purification and characterization of a metacestode cysteine proteinase from Taenia solium involved in the breakdown of human IgG AB - Infection of the central nervous system by Taenia solium cysticerci is the cause of human neurocysticercosis, a major neurological infection in the Third World and an emerging infectious disease in the United States. We previously isolated a cysteine proteinase from cysticerci of Taenia crassiceps and demonstrated that it degrades human IgG in vitro. We have now isolated a 48 kDa thiol-dependent proteinase from T. solium. The T. solium enzyme also degrades human IgG, but does not significantly degrade albumin. IgG degradation was inhibited by cysteine proteinase inhibitors, but not significantly by inhibitors of aspartic, serine, or metalloproteinases. The peptide substrate specificity and pH optimum resemble cathepsin L. The Km for the peptide substrate Z-Phe-Arg-AFC was calculated to be 7.0 x 10(-6) M, the Kcat was 1.98 x 10(5) s(-1), and the Kcat/Km 2.84 x 10(9) M-1 s(-1), a value which is within the diffusion control limit for highly catalytic enzymes. We propose that immunoglobulin degradation by the T. solium cysteine proteinase may play a key role in the host-parasite interface and could be employed as a target for chemotherapy MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 6 U4 - Parasitology U5 - J;Article AV - English IS - 0031-1820 UR - ISI:000232315600015 L2 - cysteine proteinase;Taenia solium;immunoglobulin;Taenia crassiceps;cysticercosis;IN-VITRO; CRASSICEPS; CYSTICERCOSIS; NEUROCYSTICERCOSIS SO - Parasitology 2005 ;131():411-416 13087 UI - 1338 AU - Baiza-Gutman LA AU - Martinez-Hernandez MG AU - guilar-Garcia C AU - Armant DR AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoWayne State Univ, Detroit, MI, USA TI - Plasminogen processing by peri-implantation mouse embryos MH - Mexico|Distrito Federal MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000230556300067 SO - Biology of Reproduction 2005 ;():82-82 13088 UI - 3100 AU - Baker H AU - Patel V AU - Molinolo AA AU - Shillitoe EJ AU - Ensley JF AU - Yoo GH AU - Meneses-Garcia A AU - Myers JN AU - El-Naggar AK AU - Gutkind JS AU - Hancock WS AD - Natl Inst Craniofacial & Dent Res, Oral & Pharyngeal Canc Branch, NIH, Bethesda, MD 20892, USANortheastern Univ, Dept Chem & Chem Biol, Barnett Inst, Boston, MA 02115, USASUNY Coll Med, Dept Microbiol & Immunol, Syracuse, NY 13210, USAWayne State Univ, Karmanos Canc Ctr, Dept Internal Med, Detroit, MI 48201, USAWayne State Univ, Dept Otolaryngol Head & Neck Surg, Univ Hlth Ctr 5E, Detroit, MI 48201, USANatl Inst Cancerol, Dept Pathol, Mexico City, DF, MexicoUniv Texas, MD Anderson Canc Ctr, Dept Head & Neck Surg, Houston, TX 77030, USAUniv Texas, MD Anderson Canc Ctr, Dept Pathol, Houston, TX 77030, USAGutkind, JS, Natl Inst Craniofacial & Dent Res, Oral & Pharyngeal Canc Branch, NIH, 30 Convent Dr,Bldg 30,Room 212, Bethesda, MD 20892 USA TI - Proteome-wide analysis of head and neck squamous cell carcinomas using laser-capture microdissection and tandem mass spectrometry AB - Remarkable progress has been made to identify genes expressed in squamous cell carcinomas of the head and neck (HNSCC). However, limited information is available on their corresponding protein products, whose expression, post-translational modifications, and activity are ultimately responsible for the malignant behavior of this tumor type. We have combined laser-capture microdissection (LCM) with liquid chromatography-tandem mass spectrometry (LC-MS/MS) to identify proteins expressed in histologically normal squamous epithelium and matching SCC. The protein fraction from approximately 10,000-15,000 normal and tumor cells was solubilized, digested with trypsin, and the resulting peptides were analyzed by LC-MS/MS. Database searching of the resulting sequence information identified 30-55 proteins per sample. Keratins were the most abundant proteins in both normal and tumor tissues. Among the proteins differentially expressed, keratin 13 was much Lower in tumors, whereas heat-shock (Hsp) family members were highly expressed in neoplastic cells. Wnt-6 and Wnt-14 were identified in both normal and tumor tissues, respectively, and placental growth factor (PIGF) was detected only in tumors. Immunohistochemical analysis of HNSCC tissues revealed tack of keratin 13 in tumor tissues, and strong staining in normal epithelia, and high expression of Hsp90 in tumors. Our study, by combining LCM and proteomic technologies, underscores the advantages of this approach to investigate complex changes at the protein Level in HNSCC, thus complementing existing and emerging genomic technologies. These efforts may likely result in the identification of new biomarkers for HNSCC that can be used to diagnose disease, predict susceptibility, and monitor progression in individual patients. Published by Elsevier Ltd MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 15 U4 - Oncology;Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 1368-8375 UR - ISI:000227098500011 L2 - oral cancer;microdissection;proteome;biomarkers;drug targets;mass spectrometry;PLACENTAL GROWTH-FACTOR; ORAL-CANCER; PREDICTIVE FACTORS; SHOCK-PROTEIN; EXPRESSION; WNT; DIFFERENTIATION; IDENTIFICATION; PROGRESSION; ACTIVATION SO - Oral Oncology 2005 ;41(2):183-199 13089 UI - 2498 AU - Balcar B AU - Hrusak M AD - Acad Sci Czech Republ, Inst Math, CR-11567 Prague, Czech RepublicUNAM, Inst Matemat, Morelia, Michoacan, MexicoBalcar, B, Acad Sci Czech Republ, Inst Math, Zitna 25, CR-11567 Prague, Czech Republic TI - Distributivity of the algebra of regular open subsets of ss R\R AB - We compare the structure of the algebras P(omega)/fin and Alpha(omega)/Fin, where A denotes the algebra of clopen subsets of the Cantor set. We show that the distributivity number of the algebra Alpha(omega)/Fin is bounded by the distributivity number of the algebra P(omega)/fin and by the additivity of the meager ideal on the reals. As a corollary we obtain a result of A. Dow, who showed that in the iterated Mathias model the spaces beta omega \ omega and beta R \ R are not co-absolute. We also show that under the assumption t = h the spaces beta omega \ omega and beta R \ R are co-absolute, improving on a result of E. van Douwen. (c) 2004 Published by Elsevier B.V MH - Czech Republic MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0166-8641 UR - ISI:000228510900001 L2 - distributivity of Boolean algebras;cardinal invariants of the continuum;Cech-Stone compactification;BETA-N SO - Topology and Its Applications 2005 ;149(1-3):1-7 13090 UI - 1510 AU - Balderrama SIV AU - Chazdon RL AD - Ctr Invest Cient Yucatan, Merida 97200, Yucatan, MexicoUniv Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269, USABalderrama, SIV, Ctr Invest Cient Yucatan, AC Calle 43 130 Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Light-dependent seedling survival and growth of four tree species in Costa Rican second-growth rain forests AB - The dependence of tree seedling survival and growth on light availability was evaluated over 15 mo in three second-growth, wet forest stands (15-1.8 y old) in north-eastern Costa Rica. Seedlings of four canopy tree species (Dipteryx panamensis, Hyeronima alchorneoides, Virola koschnyi and Vochysia guatenmalensis) were planted into four canopy treatments in three replicated stands and in a pasture site, spanning a nearly complete gradient of light availability. Survival and growth of all species increased in response to increasing light availability, but species differed in survival in shaded microsites (6-20%, light transmittance) and in growth increments per light increase. Hyeronima showed the highest mortality at low light levels and the highest relative height growth increase per light increase. In contrast, Virola showed high survival at low and moderate light, but showed the lowest leaf area and above-ground biomass per light increase among all species. Dipteryx and Vochysia maintained relatively high rates of survival and growth across the entire light gradient. Hyeronima and Virola showed trade-offs between growth and survival responses to light, unlike Dipteryx and Vochysia. Differences among species in seedling survival at low light may be determined by a variety of physiological and morphological traits that may or may not be mechanistically linked to growth responses MH - Mexico|Yucatan MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Ecology U5 - J;Article AV - English IS - 0266-4674 UR - ISI:000231009300004 L2 - Costa Rica;Dipteryx panamensis;forest regeneration;light availability;Hyeronima alchorneoides;second-growth forests;tree seedlings;Virola koschnyi;Vochysia guatemalensis;TROPICAL WET FOREST; CANOPY GAPS; DIPTERYX-PANAMENSIS; RELATIVE IMPORTANCE; SPATIAL HETEROGENEITY; HIGH IRRADIANCE; MOIST FOREST; LONG-TERM; DIVERSITY; GRADIENT SO - Journal of Tropical Ecology 2005 ;21():383-395 13091 UI - 127 AU - Baldovin F AU - Robledo A AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Padua, Dipartimento Fis, INFM, I-35131 Padua, ItalyUniv Padua, Sez INFN, I-35131 Padua, ItalyBaldovin, F, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Parallels between the dynamics at the noise-perturbed onset of chaos in logistic maps and the dynamics of glass formation AB - We develop the characterization of the dynamics at the noise-perturbed edge of chaos in logistic maps in terms of the quantities normally used to describe glassy properties in structural glass formers. Following the recognition [Phys. Lett. A 328, 467 (2004)] that the dynamics at this critical attractor exhibits analogies with that observed in thermal systems close to vitrification, we determine the modifications that take place with decreasing noise amplitude in ensemble- and time-averaged correlations and in diffusivity. We corroborate explicitly the occurrence of two-step relaxation, aging with its characteristic scaling property, and subdiffusion and arrest for this system. We also discuss features that appear to be specific to the map MH - Italy MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1539-3755 UR - ISI:000235065000052 L2 - INDUCED ESCAPE; ATTRACTORS; TRANSITION; LIQUIDS SO - Physical Review e 2005 ;72(6): 13092 UI - 1205 AU - Baldovin F AU - Robledo A AD - Univ Padua, Dipartimento Fis, INFM, I-35131 Padua, ItalyUniv Padua, Sez INFN, I-35131 Padua, ItalyUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoBaldovin, F, Univ Padua, Dipartimento Fis, INFM, Via Marzolo 8, I-35131 Padua, Italy TI - Glassy dynamics at the onset of chaos with additive noise AB - After recalling key phenomenological properties of glass formation, we point out that similar features are exhibited by the dynamical properties of the noise-perturbed iterates of the logistic map at the onset of chaos. The analysis includes two-step relaxation, aging, subdiffusion and arrest, as well as an expression analogous to the Adam-Gibbs relation connecting dynamical and thermodynamic properties of a glass former. The dynamical properties of the logistic map in the presence of external noise are seen to be comparable to those of a supercooled liquid above a glass transition temperature, whereas the noiseless attractor displays typical nonequilibrium aspects like loss of time translation invariance (aging). Reference is made to connections between the noiseless dynamics at the chaos threshold and the nonextensive formalism MH - Italy MH - Mexico|Distrito Federal PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Interdisciplinary Applications;Physics, Applied U5 - J;Article AV - English IS - 0219-4775 UR - ISI:000231893000026 L2 - edge of chaos;external noise;glassy dynamics;nonextensive statistics;LIQUIDS SO - Fluctuation and Noise Letters 2005 ;5(2):L313-L318 13093 UI - 2236 AU - Baldwin S AU - Santos C AU - Brown EM AU - Nuno T AU - Giuliano A AU - Davis J AU - Garcia F AD - Univ Arizona, Hlth Sci Ctr, Dept Obstet & Gynecol, Tucson, AZ 85724, USAUniv Arizona, Dept Pathol, Tucson, AZ 85724, USAUniv Arizona, Arizona Canc Ctr, Tucson, AZ 85724, USAUniv Arizona, Arizona Hispan Ctr Excellence, Tucson, AZ 85724, USAUniv Arizona, Womens Ctr Excellence, Tucson, AZ 85724, USAInst Nacl Enfermedades Neoplasicas, Dept Ginecol, Lima, PeruISSSTE, Dept Citol, Hermosillo, Sonora, MexicoGarcia, F, Univ Arizona, Hlth Sci Ctr, Dept Obstet & Gynecol, 1501 N Campbell Ave,POB 245078, Tucson, AZ 85724 USA TI - Comparison of type-specific human papillomavirus data from self and clinician directed sampling AB - Objective(s). To compare the type-specific human papillomavirus (HPV) recovery from physician and patient-collected samples. Method. Three hundred thirty-four (334) women attending colposcopy clinics in three Countries were enrolled in this cross-sectional study. Cervicovaginal samples were collected by patients and physicians and processed with polymerase chain reaction and reverse line blot genotyping. McNemar's Chi-squared tests and Kappa statistics were utilized to determine statistical associations between physician-versus patient-collected samples. Results. Oncogenic HPV infection was identified in 23.2% of patient-collected specimens compared to 34.9% of physician-collected specimens, Physician sampling detected significantly more infections with type 16 and 52 than did self-sampling and significantly more oncogenic HPV infection overall. For non-oncogenic HPV detection, there was no statistical difference between physician- and patient-collected samples. Conclusion(s). Patient sampling for HPV using a single vaginal brush does not identify all oncogenic HPV subtype. (c) 2005 Elsevier Inc. All rights reserved MH - USA MH - Mexico|Sonora MH - Peru PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Oncology;Obstetrics & Gynecology U5 - J;Article AV - English IS - 0090-8258 UR - ISI:000229231000047 L2 - human papillomavirus;cervical cancer;self-sampling;clinician directed sampling;POLYMERASE-CHAIN-REACTION; CERVICAL-CANCER; COLLECTED SAMPLES; PREVALENCE; WORLDWIDE; CYTOLOGY; DNA SO - Gynecologic Oncology 2005 ;97(2):612-617 13094 UI - 3446 AU - Ballesteros MN AU - Cabrera RM AU - Saucedo MD AU - Aggarwal D AU - Shachter NS AU - Fernandez ML AD - Univ Connecticut, Dept Nutrit Sci, Storrs, CT 06269, USACIAD, Hermosillo, Sonora, MexicoColumbia Univ, New York, NY 10032, USAFernandez, ML, Univ Connecticut, Dept Nutrit Sci, Storrs, CT 06269, USA TI - High intake of saturated fat and early occurrence of specific biomarkers may explain the prevalence of chronic disease in Northern Mexico AB - To investigate whether the high prevalence of coronary heart disease (CHD) and type II diabetes prevalent in Northern Mexico could be related to the presence at a young age of biomarkers for chronic disease, 25 boys and 29 girls (8-12 y old) from a low socioeconomic group were recruited. Plasma lipids, LDL phenotype, apolipoproteins (apos), glucose, and insulin were evaluated. Analysis of 3-d dietary records indicated the typical intake of this region to be high in total fat (37-43% energy) and saturated fat (11-13% energy). Boys and girls had an average of 6623 +/- 2892 and 6112 +/- 2793 steps/d, respectively, as measured by a pedometer, suggesting a low level of activity. Plasma total and LDL cholesterol (LDL-C) were within the 50th percentile. In contrast, the study population was characterized by having high triglycerides (TG) (95th percentile, 1.25 +/- 0.37 mmol/L in boys and 1.19 +/- 0.38 mmol/L in girls). HDL cholesterol (HDL-C) concentrations were low (25th percentile), 1.22 +/- 0.20 mmol/L in girls and 1.29 +/- 0.20 mmol/L in boys. There was also a high prevalence of the small dense LDL phenotype B (69%), which is associated with increased risk for CHD. These results suggest that the population of children studied may have 2 different components of risk, one being the high-fat diet, which could be associated with the elevated levels of plasma LDL-C present in the adult population. A second component, related to the insulin resistance syndrome, may be principally genetic and associated with the high TG, low HDL, and LDL phenotype B observed in these Mexican children MH - Mexico|Sonora MH - USA PB - BETHESDA: AMER INST NUTRITION RP - NOT IN FILE U3 - TC 5 U4 - Nutrition & Dietetics U5 - J;Article AV - English IS - 0022-3166 UR - ISI:000226273000013 L2 - chronic disease;Mexican children;LDL phenotype;saturated fat;plasma triglycerides;CORONARY-HEART-DISEASE; DENSITY-LIPOPROTEIN CHOLESTEROL; PLASMA LDL-CHOLESTEROL; ENZYMATIC DETERMINATION; ADULT MEN; RISK; CHILDREN; WOMEN; SERUM; METABOLISM SO - Journal of Nutrition 2005 ;135(1):70-73 13095 UI - 1206 AU - Baltazar-Lopez ME AU - Burger CR AU - Chona R AU - Suh S AD - CENIDET, Dept Ingn Mecan, Cuernavaca 62490, Morelos, MexicoTexas A&M Univ, Dept Mech Engn, College Stn, TX 77843, USABaltazar-Lopez, ME, CENIDET, Dept Ingn Mecan, Int Internado Palmira S-N, Cuernavaca 62490, Morelos, Mexico TI - Study of wave motion on tubulars using broad-band laser ultrasound AB - We investigate the transition characteristics of laser-generated ultrasonic waves propagating along the axial and circumferential directions in tubulars. The thermo-acousto-photonic non-destructive evaluation technique is employed to initiate broad-band surface and guided waves in tubulars of several different outer diameters and wall thicknesses. A non-contact broad-band optical sensor known as fiber-tip interferometry is used for wave acquisition. Wave dispersion as a function of thickness to mean radius ratio is resolved using a Gabor wavelet transform based algorithm. The algorithm enables dispersion to be established through the deployment of just one sensing interferometer. This is in contrast to techniques which require multiple detection locations for the determination of wave dispersion MH - Mexico|Morelos MH - USA PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Mechanics U5 - J;Article AV - English IS - 0014-4851 UR - ISI:000231909000005 L2 - laser ultrasound;cylindrical structure;Gabor wavelet transform;CYLINDRICAL-SHELLS; PROPAGATION; FOURIER; LINE SO - Experimental Mechanics 2005 ;45(5):427-432 13096 UI - 3082 AU - Baltazar BM AU - Sanchez-Gonzalez JD AU - de la Cruz-Larios L AU - Schoper JB AD - Pioneer HiBred Int Inc, Tapachula, Nayarit, MexicoUniv Guadalajara, Ctr Univ Ciencias Biol & Agropecuarias, Mpio Zapopan 45110, Jalisco, MexicoPioneer Sementes, Unidade Brasilia, BR-73310970 Brasilia, DF, BrazilBaltazar, BM, Pioneer HiBred Int Inc, Camino Viejo Valle Banderas,Km 3,19, Tapachula, Nayarit, Mexico TI - Pollination between maize and teosinte: an important determinant of gene flow in Mexico AB - Gene flow between maize [Zea mays (L.)] and its wild relatives does occur, but at very low frequencies. Experiments were undertaken in Tapachula, Nayarit, Mexico to investigate gene flow between a hybrid maize, landraces of maize and teosinte (Z. mays ssp. mexicana, races Chalco and Central Plateau). Hybridization, flowering synchrony, pollen size and longevity, silk elongation rates, silk and trichome lengths and tassel diameter and morphology were measured. Hybrid and open-pollinated maize ears produced a mean of 8 and 11 seeds per ear, respectively, when hand-pollinated with teosinte pollen, which is approximately 1 - 2% of the ovules normally produced on a hybrid maize ear. Teosinte ears produced a mean of 0.2 - 0.3 seeds per ear when pollinated with maize pollen, which is more than one-fold fewer seeds than produced on a maize ear pollinated with teosinte pollen. The pollination rate on a per plant basis was similar in the context of a maize plant with 400 - 500 seeds and a teosinte plant with 30 - 40 inflorescences and 9 - 12 fruitcases per inflorescence. A number of other factors also influenced gene-flow direction: (1) between 90% and 95% of the fruitcases produced on teosinte that was fertilized by maize pollen were sterile; (2) teosinte collections were made in an area where incompatibility systems that limit fertilization are present; (3) silk longevity was much shorter for teosinte than for maize (approx. 4 days vs. approx. 11 days); (4) teosinte produced more pollen on a per plant basis than the landraces and commercial hybrid maize; (5) teosinte frequently produced lateral branches with silks close to a terminal tassel producing pollen. Collectively these factors tend to favor crossing in the direction of teosinte to maize. Our results support the hypothesis that gene flow and the subsequent introgression of maize genes into teosinte populations most probably results from crosses where teosinte first pollinates maize. The resultant hybrids then backcross with teosinte to introgress the maize genes into the teosinte genome. This approach would slow introgression and may help explain why teosinte continues to co-exist as a separate entity even though it normally grows in the vicinity of much larger populations of maize MH - Brazil MH - Mexico|Jalisco MH - Mexico|Nayarit PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 12 U4 - Agronomy;Plant Sciences;Genetics & Heredity;Horticulture U5 - J;Article AV - English IS - 0040-5752 UR - ISI:000227049900012 L2 - HYBRIDIZATION; INTROGRESSION; POLLEN SO - Theoretical and Applied Genetics 2005 ;110(3):519-526 13097 UI - 3143 AU - Balvanera P AU - Kremen C AU - Martinez-Ramos M AD - Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Morelia 58089, Michoacan, MexicoPrinceton Univ, Dept Ecol & Evolut Biol, Princeton, NJ 08544, USABalvanera, P, Univ Nacl Autonoma Mexico, Ctr Invest Ecosistemas, Apdo Post 27-3, Morelia 58089, Michoacan, Mexico TI - Applying community structure analysis to ecosystem function: Examples from pollination and carbon storage AB - Human enterprise is increasingly affecting biodiversity beyond outright species losses, causing changes in ecosystem functions and the services they deliver to human beings. However, few tools are available to analyze how community attributes other than simple species richness affect ecosystem functioning, or how relative contribution to the function is distributed among the species within a community. Here, we adapted methods for describing the evenness in relative abundance among species (i.e., community structure) to the description of the evenness in species' relative contribution to ecosystem function (i.e., functional structure). We developed graphical approaches to: (1) describe the functional structure, (2) show the relationship between community and functional structures, (3) examine the influence of species identity on, ecosystem function, and the relationship between species' relative functional contribution and relative abundance, and (4) determine the effects of management on the total magnitude of ecosystem function, on community and functional structures, and on individual species' contribution to the function. We applied these methods to two contrasting ecosystem function cases: watermelon pollination by native bees in California and carbon storage in trees of a tropical humid forest in Chiapas, Mexico. Functional structure for pollination under organic management within a conserved forest matrix showed that the first two species contributed 80% of the function. Increasingly intensive management (e.g., conventional agriculture) caused the loss of 60% of the species, reductions in abundance of functionally important species, loss of 60-80% of the pollination function, and decreased evenness in functional structure. Functional structure for carbon storage of a conserved forest showed that 13% of species contributed 90% of the function. Forest under a hypothetical scenario of selective timber extraction showed a loss of 60% of carbon storage, no species loss, and an increase in evenness of the species' contribution to the function. Compared to conserved forest, secondary forests shared only 17% of species, 80% less carbon storage, but similar evenness of species' contribution to this function. Overall, the tools developed here, and their applications, show that impacts of management regimes on functional. structure vary with the analyzed function and ecosystem, differentially affecting species richness, species composition, dominance of the first-ranked species, evenness in species' functionality, and potentially the stability of the function itself MH - Mexico|Michoacan MH - USA PB - WASHINGTON: ECOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 13 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 1051-0761 UR - ISI:000227120700029 L2 - biodiversity conservation;community structure;carbon storage;crop pollination;diversity-function;dominance-diversity curves;ecosystem function;ecosystem service;indicator species;management;species richness;HUMID TROPICAL REGION; RAIN-FOREST; PLANT-COMMUNITIES; HONEY-BEE; LONG-TERM; DIVERSITY; BIODIVERSITY; BIOMASS; MEXICO; PRODUCTIVITY SO - Ecological Applications 2005 ;15(1):360-375 13098 UI - 3379 AU - Band-Schmidt CJ AU - Bustillos-Guzman J AU - Garate-Lizarraga I AU - Lechuga-Deveze CH AU - Reinhardt K AU - Luckas B AD - CIBNOR, La Paz 23000, MexicoIPN, CICIMAR, Dept Plancton & Ecol Marina, La Paz 23000, MexicoUniv Jena, Fac Biol & Pharm, Dept Food Chem, D-07743 Jena, GermanyBustillos-Guzman, J, CIBNOR, Apdo Postal 128, La Paz 23000, Mexico TI - Paralytic shellfish toxin profile in strains of the dinoflagellate Gymnodinium catenatum Graham and the scallop Argopecten ventricosus G.B. Sowerby II from Bahia concepcion, Gulf of California, Mexico AB - Gymnodinium catenatum Graham is a paralytic shellfish poison (PSP) producer that was described for the first time from the Gulf of California in 1943. During the last decade, its distribution along the Mexican Pacific coastline has increased. In Bahia Concepcion, a coastal lagoon on the western side of the Gulf of California, G. catenatum has been linked to significant PSP concentrations found in mollusks. In this study, we describe the saxitoxin profile of 16 strains of G. catenatum, and catarina scallops (Argopecten ventricosus) from Bahia Concepcion. Toxins were analyzed by HPLC with post-column oxidation and fluorescence detection. The average toxicity of the G. catenatum strains was 26.0 +/- 6.0 pg and 28.0 +/- 18.0 pg STX eq/cell after 17 and 22 days of growth, respectively. Ten toxins were recorded, but only dcSTX, dcGTX2, dcGTX3, C1, and C2 were always present in all strains at both growth stages. Since toxin profiles in scallops were similar to the cultures, biotransformations are not significant in catarina scallop. NeoSTX, GTX2, GTX3, and B2 were present in some G. catenatum strains and their presence varied with the age of the culture. In scallop samples, dcSTX, dcGTX2, and dcGTX3 were the most abundant toxins, and from the C-toxin group, only C2 was found. This unique toxin profile can be used as a biomarker for this population, when compared with strains of G. catenatum from other geographic regions. (C) 2003 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 1568-9883 UR - ISI:000226445800002 L2 - Argopecten ventricosus;dinoflagellate;Gulf of California;Gymnodinium catenatum;paralytic shellfish poisoning;scallop;POISONING TOXINS; PSP TOXINS; HPLC; DINOPHYCEAE; ALEXANDRIUM; PACIFIC SO - Harmful Algae 2005 ;4(1):21-31 13099 UI - 2539 AU - Bandeira FP AU - Martorell C AU - Meave JA AU - Caballero J AD - Univ Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Mexico City 04510, DF, MexicoUniv Estadual Feira de Santana, Dept Ciencias Biol, Feira De Santana, BrazilUNAM, Fac Ciencias, Mexico City, DF, MexicoCaballero, J, Univ Nacl Autonoma Mexico, Inst Biol, Jardin Bot, Apartado Postal 70-614, Mexico City 04510, DF, Mexico TI - The role of rustic coffee plantations in the conservation of wild tree diversity in the Chinantec region of Mexico AB - Rustic coffee plantations are characterised by the use of numerous wild and cultivated tree species for providing shade to the coffee shrubs. This paper analyses the role of these plantations in wild tree conservation through the examination of their patterns of floristic variation in southern Mexico. The studied plantations included a total of 45 plant species, most of which were wild tree species, including both mature forest and pioneer taxa. An extrapolation of the species accumulation curve among stands indicated that the whole system, composed of more than 100 coffee plantations, may harbour as many as 34 species of wild trees. The floristic structure of rustic coffee plantations was highly variable. This variation is a result of a combination of factors such as human management, original stand cover and the asynchrony in development stage of different plantations. This promotes a large beta-diversity in the system. Thus, although a single plantation may have a limited potential to preserve wild tree species, it is the whole ensemble of floristically heterogeneous plantations which renders this agroforestry system valuable for plant diversity conservation, particularly in a region where native forest vegetation has almost disappeared MH - Brazil MH - Mexico|Distrito Federal PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0960-3115 UR - ISI:000228507100013 L2 - alfa diversity;beta diversity;Chinantec;coffee cultivation;ethnoecology;in situ conservation;Mexico;SHADE COFFEE; BIODIVERSITY; CHIAPAS SO - Biodiversity and Conservation 2005 ;14(5):1225-1240 13100 UI - 2425 AU - Bandy WL AU - Michaud F AU - Bourgois J AU - Calmus T AU - Dyment J AU - Mortera-Gutierrez CA AU - Ortega-Ramirez J AU - Pontoise B AU - Royer JY AU - Sichler B AU - Sosson M AU - Rebolledo-Vieyra M AU - Bigot-Cormier F AU - az-Molina O AU - Hurtado-Artunduaga AD AU - Pardo-Castro G AU - Trouillard-Perrot C AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Paris 06, Geosci Azur, Villefranche Sur Mer, FranceUniv Paris 06, CNRS, IRD, Paris, FranceEPN, Quito, EcuadorUniv Nacl Autonoma Mexico, Inst Geol, Hermosillo, Sonora, MexicoCNRS, Plouzane, FranceUniv Paris 06, LGTE, IRD, Paris, FranceIFREMER, Plouzane, FranceUniv Nice, Geosci Azur, F-06108 Nice, FranceUniv Bretagne Occidentale, Plouzane, FranceInst Nacl Antropol & Hist, Geophys Lab, Mexico City, DF, MexicoBandy, WL, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Subsidence and strike-slip tectonism of the upper continental slope off Manzanillo, Mexico AB - The direction of convergence between the Rivera and North American plates becomes progressively more oblique (in a counter-clockwise sense as measured relative to the trench-normal direction) northwestward along the Jalisco subduction zone. By analogy to other subduction zones, the forces resulting from this distribution of convergence directions are expected to produce a NW moving, fore-arc sliver and a NW-SE stretching of the fore-arc area. Also, a series of roughly arc parallel strike-slip faults may form in the fore-arc area, both onshore and offshore, as is observed in the Aleutian are. In the Jalisco subduction zone, the Jalisco block has been proposed to represent such a fore-arc sliver. However, this proposal has encountered one major problem. Namely, right-lateral strike-slip faulting within the fore-arc sliver, and between the fore-arc sliver and the North American plate, should be observed. However, evidence for the expected right-lateral strike-slip faulting is sparse. Some evidence for right-lateral strike-slip faulting along the Jalisco block-North American plate boundary (the Tepic-Zacoalco rift system) has been reported, although some disagreement exists. Right-lateral strike-slip faulting has also been reported within the interior of the Jalisco block and in the southern Colima rift, which forms the SE boundary of the Jalisco block. Threefold, multi-channel seismic reflection data were collected in the offshore area of the Jalisco subduction zone off Manzanillo in April 2002 during the FAMEX campaign of the N/O L'Atalante. These data provide additional evidence for recent strike-slip motion within the fore-arc region of the Jalisco subduction zone. This faulting offsets right-laterally a prominent horst block within the southern Colima rift, from which we conclude that the sense of motion along the faulting is dextral. These data also provide additional evidence for recent subsidence within the area offshore of Manzanillo, as has been proposed. (c) 2005 Elsevier B.V. All rights reserved MH - Ecuador MH - France MH - Mexico|Distrito Federal MH - Mexico|Sonora PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0040-1951 UR - ISI:000228715100002 L2 - tectonics;fore-arc;Mexico;seismic reflection;oblique convergence;arc parallel stretching;1995 COLIMA-JALISCO; MIDDLE AMERICA TRENCH; WESTERN MEXICO; OBLIQUE SUBDUCTION; NORTH-AMERICAN; VOLCANIC BELT; FORE-ARC; TRIPLE JUNCTION; OCTOBER 9; SOUTHWESTERN MEXICO SO - Tectonophysics 2005 ;398(3-4):115-140 13101 UI - 2772 AU - Bandyopadhyay A AU - Wang L AU - Loepz-Casillas F AU - Mendoza V AU - Yeh IT AU - Sun LZ AD - Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, San Antonio, TX 78229, USAUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Cellular Biol, Mexico City 04510, DF, MexicoUniv Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78284, USASun, LZ, Univ Texas, Hlth Sci Ctr, Dept Cellular & Struct Biol, 7703 Floyd Curl Dr,Mail Code 7762, San Antonio, TX 78229 USA TI - Systemic administration of a soluble betaglycan suppresses tumor growth, angiogenesis, and matrix metalloproteinase-9 expression in a human xenograft model of prostate cancer AB - BACKGROUND. Transforming growth factor beta (TGF beta) over-expression in prostate cancer has been shown to promote tumor progression and neo-vascularization. In this study, we have investigated the efficacy and the potential mechanism of a TGF beta antagonist, a recombinant soluble betaglycan (sBG), as a prostate cancer therapeutic agent after systemic administration in a xenograft model. METHODS. Recombinant sBG was delivered continuously via ALZET osmotic pumps or by daily bolus i.p. injection at 4.2 mg/kg/day for 14 days in human prostate cancer DU145 xenograft bearing nude mice. Tumors were analyzed for their size, blood volume by hemoglobin assay, microvessel density (MVD) by CD-31 immunostaining, and apoptosis by TUNEL assay. Matrix metalloproteinase-9 (MMP-9) activity and expression in the DU145 conditioned media were determined by gelatin zymography and Western blotting, respectively. Tissue sections were stained with a polyclonal antibody to MMP-9 using an immuno-fluorescence method. RESULTS. Continuous or bolus administration of sBG showed a similar significant inhibition of DU145 xenograft growth associated with a reduced tumor blood volume and MVD, and an enhanced intra-tumoral apoptosis. Treatment with sBG inhibited both endogenous and TGF beta-induced MMP-9 activity and expression in a dose-dependent manner in vitro and reduced in vivo MMP-9 expression in DU145 xenografts. CONCLUSIONS. Our results for the first time indicate that TGF beta blockade by systemic sBG administration can inhibit DU145 prostate xenograft growth and angiogenesis. The inhibition is likely in part mediated by the attenuation of TGF beta-induced MMP-9 expression. (c) 2004Wiley-Liss, Inc MH - Mexico|Distrito Federal MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 11 U4 - Endocrinology & Metabolism;Urology & Nephrology U5 - J;Article AV - English IS - 0270-4137 UR - ISI:000227685300008 L2 - angiogenesis;apoptosis;matrix metalloproteinase-9;tumor growth;betaglycan;prostate cancer;TGF beta;FACTOR-BETA; TGF-BETA; TRANSFORMING GROWTH-FACTOR-BETA-1; MICROVESSEL DENSITY; MDA-MB-231 CELLS; LIGAND-BINDING; RECEPTORS; TUMORIGENICITY; INVOLVEMENT; PROGRESSION SO - Prostate 2005 ;63(1):81-90 13102 UI - 1160 AU - Banhart F AU - Li JX AU - Terrones M AD - Johannes Gutenberg Univ Mainz, Inst Phys Chem, D-55099 Mainz, GermanyIPICyT, Adv Mat Dept, San Luis Potosi 78216, MexicoBanhart, F, Johannes Gutenberg Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany TI - Cutting single-walled carbon nanotubes with an electron beam: Evidence for atom migration inside nanotubes MH - Germany MH - Mexico|San Luis Potosi PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 9 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1613-6810 UR - ISI:000231765500008 L2 - carbon nanotubes;defects;electron microscopy;irradiation;IRRADIATION; MICROSCOPE SO - Small 2005 ;1(10):953-956 13103 UI - 38 AU - Banks WD AU - Luca F AU - Shparlinski IE AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Math, Morelia, Michoacan, MexicoMacquarie Univ, Dept Comp, N Ryde, NSW 2109, AustraliaBanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Some divisibility properties of the Euler function AB - Let phi((.)) denote the Euler function, and let a > 1 be a fixed integer. We study several divisibility conditions which exhibit typographical similarity with the standard formulation of the Euler theorem, such as a(n) equivalent to 1 (mod phi(n)), and we estimate the number of positive integers n <= x satisfying these conditions MH - Australia MH - Mexico|Michoacan MH - USA PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0017-0895 UR - ISI:000238197500008 L2 - PRIME FACTORS; NUMBER SO - Glasgow Mathematical Journal 2005 ;47():517-528 13104 UI - 56 AU - Banks WD AU - Luca F AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58089, Michoacan, MexicoBanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Roughly squarefree values of the Euler and Carmichael functions MH - Mexico|Michoacan MH - USA PB - WARSAW 10: POLISH ACAD SCIENCES INST MATHEMATICS RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0065-1036 UR - ISI:000237373600001 SO - Acta Arithmetica 2005 ;120(3):211-230 13105 UI - 198 AU - Banks WD AU - Garaev MZ AU - Luca F AU - Shparlinski IE AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58180, Michoacan, MexicoMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaBanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Uniform distribution of the fractional part of the average prime divisor AB - We estimate exponential sums with the function p(n) defined as the average of the prime divisors of an integer n >= 2 (we also put p(1) = 0). Our bound implies that the fractional parts of the numbers {p(n) : n >= 1} are uniformly distributed over the unit interval. We also estimate the discrepancy of the distribution, and we determine the precise order of the counting function of the set of those positive integers n such that p(n) is an integer MH - Australia MH - Mexico|Michoacan MH - USA PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 4 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0933-7741 UR - ISI:000234504300002 L2 - NUMBER SO - Forum Mathematicum 2005 ;17(6):885-901 13106 UI - 310 AU - Banks WD AU - Luca F AU - Saidak F AU - Stanica P AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58089, Michoacan, MexicoWake Forest Univ, Dept Math, Winston Salem, NC 27109, USAAuburn Univ, Dept Math, Montgomery, AL 36124, USABanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Compositions with the Euler and Carmichael functions AB - Let phi and lambda be the Enter and Carmichael functions, respectively. In this paper, we establish lower and upper bounds for the number of positive integers n <= x such that phi(lambda(n)) = lambda(phi(n)). We also study the normal order of the wfunction phi(lambda(n))/lambda(phi(n)) MH - Mexico|Michoacan MH - USA PB - GOTTINGEN: VANDENHOECK & RUPRECHT RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-5858 UR - ISI:000234084700012 L2 - PHI-FUNCTION; ARITHMETIC FUNCTIONS; PRIME FACTORS; VALUES; NUMBER; DIVISORS; SUM SO - Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg 2005 ;75():215-244 13107 UI - 1248 AU - Banks WD AU - Ford K AU - Luca F AU - Pappalardi F AU - Shparlinski IE AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Illinois, Dept Math, Urbana, IL 61801, USAUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58089, Michoacan, MexicoUniv Rome, Rome, ItalyMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaBanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Values of the euler function in various sequences AB - Let phi(n) and lambda(n) denote the Euler and Carmichael functions, respectively. In this paper, we investigate the equation phi(n)(r) = lambda(n)(s), where r >= s >= 1 are fixed positive integers. We also study those positive integers n, not equal to a prime or twice a prime, such that phi(n) = p - 1 holds with some prime p, as well as those positive integers n such that the equation phi(n) = f (m) holds with some integer m, where f is a fixed polynomial with integer coefficients and degree deg f > 1 MH - Australia MH - Italy MH - Mexico|Michoacan MH - USA PB - VIENNA: SPRINGER WIEN RP - NOT IN FILE U3 - TC 5 U4 - Mathematics U5 - J;Article AV - English IS - 0026-9255 UR - ISI:000231647000001 L2 - Euler function;Carmichael function;primes;polynomials;PRIME FACTORS; PHI-FUNCTION; NUMBER; NUMERORUM SO - Monatshefte fur Mathematik 2005 ;146(1):1-19 13108 UI - 1758 AU - Banks WD AU - Luca F AU - Shparlinski IE AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58089, Michoacan, MexicoMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaBanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Irrationality of power series for various number theoretic functions AB - We study formal power series whose coefficients are taken to be a variety of number theoretic functions, such as the Euler, Mobius and divisor functions. We show that these power series are irrational over Z[X], and we obtain lower bounds on the precision of their rational approximations MH - Australia MH - Mexico|Michoacan MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0025-2611 UR - ISI:000230460400005 SO - Manuscripta Mathematica 2005 ;117(2):183-197 13109 UI - 1901 AU - Banks WD AU - Luca F AU - Saidak F AU - Shparlinski IE AD - Univ Missouri, Dept Math, Columbia, MO 65211, USAUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58089, Michoacan, MexicoMacquarie Univ, Dept Comp, Sydney, NSW 2109, AustraliaBanks, WD, Univ Missouri, Dept Math, Columbia, MO 65211, USA TI - Values of arithmetical functions equal to a sum of two squares AB - Let phi(n) denote the Euler function. In this paper, we determine the order of growth for the number of positive integers n <= x for which rho(n) is the sum of two square numbers. We also obtain similar results for the Dedekind function psi(n) and the sum of divisors function sigma(n) MH - Australia MH - Mexico|Michoacan MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 3 U4 - Mathematics U5 - J;Article AV - English IS - 0033-5606 UR - ISI:000229905100001 L2 - PRIME SO - Quarterly Journal of Mathematics 2005 ;56():123-139 13110 UI - 727 AU - Barahona A AU - Ayala FJ AD - UNAM, Fac Ciencias, Dept Biol Evolut, Tlalpan 14410, MexicoUniv Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697, USABarahona, A, UNAM, Fac Ciencias, Dept Biol Evolut, Zapata 6-9,Col Miguel Hidalgo, Tlalpan 14410, Mexico TI - Time line - The emergence and development of genetics in Mexico AB - Early in the twentieth century it was shown that Mendel's laws apply to plants and animals and that genes reside on chromosomes. In the 1950s the double-helix model of DNA inaugurated the molecular biology era, which culminated at the end of the century with the publication of the human genome sequence. Although the early response to discoveries in genetics was slow in Mexico, the Green Revolution and other agricultural applications of genetic knowledge contributed greatly to economic welfare, and by the end of the millennium Mexican genetics had reached world-class status at several universities and research institutions MH - Mexico|Distrito Federal MH - USA PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 1 U4 - Genetics & Heredity U5 - J;Editorial Material AV - English IS - 1471-0056 UR - ISI:000232990900016 L2 - INVERSION POLYMORPHISM; SCIENCE; PSEUDOOBSCURA; DROSOPHILA; EXPRESSION; CONTEXT SO - Nature Reviews Genetics 2005 ;6(11):860-866 13111 UI - 1467 AU - Barahona A AU - Ayala FJ AD - UNAM, Dept Biol Evol, Fac Ciencias, Coyoacan 04510, MexicoUniv Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697, USABarahona, A, UNAM, Dept Biol Evol, Fac Ciencias, Coyoacan 04510, Mexico TI - Theodosius Dobzhansky's role in the emergence and institutionalization of genetics in Mexico MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: GENETICS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity U5 - J;Editorial Material AV - English IS - 0016-6731 UR - ISI:000231097700001 L2 - DROSOPHILA-PSEUDOOBSCURA; POPULATION-GENETICS; INVERSION POLYMORPHISM; NATURAL-POPULATIONS; CHROMOSOME; ORIGIN SO - Genetics 2005 ;170(3):981-987 13112 UI - 1765 AU - Barahona A AU - Pinar S AU - Ayala FJ AD - UNAM, Dept Evolut Biol, Fac Ciencias, Mexico City 14410, DF, MexicoCSIC, Hist Inst, E-28014 Madrid, SpainUniv Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697, USABarahona, A, UNAM, Dept Evolut Biol, Fac Ciencias, Zapata 6-9,Col Miguel Hidalgo, Mexico City 14410, DF, Mexico TI - Introduction and institutionalization of genetics in Mexico AB - We explore the distinctive characteristics of Mexico's society, politics and history that impacted the establishment of genetics in Mexico, as a new disciplinary field that began in the early 20th century and was consolidated and institutionalized in the second half. We identify about three stages in the institutionalization of genetics in Mexico. The first stage can be characterized by Edmundo Taboada, who was the leader of a research program initiated during the Cardenas government (1934-1940), which was primarily directed towards improving the condition of small Mexican farmers. Taboada is the first Mexican post-graduate investigator in phytotechnology and phytopathology, trained at Cornell University and the University of Minnesota, in 1932 and 1933, respectively. He was the first investigator to teach plant genetics at the National School of Agriculture and wrote the first textbook of general genetics, Genetics Notes, in 1938. Taboada's most important single genetics contribution was the production of "stabilized" corn varieties. The extensive exile of Spanish intellectuals to Mexico, after the end of Spain's Civil War (1936-1939), had a major influence in Mexican science and characterizes the second stage. The three main personalities contributing to Mexican genetics are Federico Bonet de Marco and Bibiano Fernandez Osorio Tafall, at the National School of Biological Sciences, and Jose Luis de la Loma y Oteyza, at the Chapingo Agriculture School. The main contribution of the Spanish exiles to the introduction of genetics in Mexico concerned teaching. They introduced in several universities genetics as a distinctive discipline within the biology curriculum and wrote genetics text books and manuals. The third stage is identified with Alfonso Leon de Garay, who founded the Genetics and Radiobiology Program in 1960 within the National Commission of Nuclear Energy, which had been founded in 1956. The Genetics and Radiobiology Program rapidly became a disciplinary program, for it embraced research, teaching, and training of academics and technicians. The Mexican Genetics Society, created by de Garay in 1966, and the development of strains and cultures for genetics research were important activities. One of de Garay's key requirements was the compulsory training of the Program's scientists for at least one or two years in the best universities of the United States and Europe. De Garay's role in the development of Mexican genetics was fundamental. His broad vision encompassed the practice of genetics in all its manifestations MH - Mexico|Distrito Federal MH - Spain MH - USA PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Biology;History & Philosophy Of Science U5 - J;Article AV - English IS - 0022-5010 UR - ISI:000230347200004 L2 - Alfonso Leon de Garay;Bibiano Osorio Tafall;Edmundo Taboada;genetics and agriculture;genetics and health;institutionalization of genetics in Mexico;Jose Luis de la Loma y Oteyza;DROSOPHILA-PSEUDOOBSCURA; POPULATION-GENETICS; INVERSION POLYMORPHISM; NATURAL-POPULATIONS; SCIENCE SO - Journal of the History of Biology 2005 ;38(2):273-299 13113 UI - 958 AU - Barandela R AU - Ferri FJ AU - Sanchez JS AD - Inst Technol Toluca, Metepec 52140, MexicoUniv Valencia, Dept Informat, E-46100 Valencia, SpainUniv Jaume 1, Dept Llenguatges & Sistemes Informat, Castellon de La Plana 12071, SpainSanchez, JS, Inst Technol Toluca, Av Tecnol S-N, Metepec 52140, Mexico TI - Decision boundary preserving prototype selection for nearest neighbor classification AB - The excessive computational resources required by the Nearest Neighbor rule are a major concern for a number of specialists and practitioners in the Pattern Recognition community. Many proposals for decreasing this computational burden, through reduction of the training sample size, have been published. This paper introduces an algorithm to reduce the training sample size while preserving the original decision boundaries as much as possible. Consequently, the algorithm tends to obtain classification accuracy close to that of the whole training sample. Several experimental results demonstrate the effectiveness of this method when compared to other reduction algorithms based on similar ideas MH - Mexico|Estado De Mexico MH - Spain PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0218-0014 UR - ISI:000232497900004 L2 - Nearest Neighbor rule;size reduction;classification accuracy;consistent subset;decision boundaries;LEARNING ALGORITHMS; INSTANCE SELECTION; TABU SEARCH; RULE; CLASSIFIERS; DESIGN; SUBSET SO - International Journal of Pattern Recognition and Artificial Intelligence 2005 ;19(6):787-806 13114 UI - 337 AU - Barba J AU - Bustamante VH AU - Flores-Valdez MA AU - Deng WY AU - Finlay BB AU - Puente JL AD - Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Cuernavaca 62210, Morelos, MexicoUniv British Columbia, Michael Smith Labs, Vancouver, BC V5Z 1M9, CanadaPuente, JL, Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Mol Microbiol, Av Univ 2001, Cuernavaca 62210, Morelos, Mexico TI - A positive regulatory loop controls expression of the locus of enterocyte effacement-encoded regulators Ler and GrlA AB - The formation of attaching and effacing (A/E) lesions on intestinal epithelial cells is an essential step in the pathogenesis of human enteropathogenic and enterohemorthagic Escherichia coli and of the mouse pathogen Citrobacter rodentium. The genes required for the development of the A/E phenotype are located within a pathogenicity island known as the locus of enterocyte effacement (LEE). The LEE-encoded transcriptional regulators Ler, an H-NS-like protein, and GrIA, a member of a novel family of transcriptional activators, positively control the expression of the genes located in the LEE and their corresponding virulence. In this study, we used C rodentium as a model to study the mechanisms controlling the expression of Ler and GrIA. By deletion analysis of the ler and grlRA regulatory regions and complementation experiments, negative and positive cis-acting regulatory motifs were identified that are essential for the regulation of both genes. This analysis confirmed that GrlA is required for the activation of ler, but it also showed that Ler is required for the expression of grlRA, revealing a novel regulatory loop controlling the optimal expression of virulence genes in A/E pathogens. Furthermore, our results indicate that Ler and GrIA induce the expression of each other by, at least in part, counteracting the repression mediated by H-NS. However, whereas GrIA is still required for the optimal expression of ler even in the absence of H-NS, Ler is not needed for the expression of grlRA in the absence of H-NS. This type of transcriptional positive regulatory loop represents a novel mechanism in pathogenic bacteria that is likely required to maintain an appropriate spatiotemporal transcriptional response during infection MH - Canada MH - Mexico|Morelos PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 13 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000234009200005 L2 - ENTEROPATHOGENIC ESCHERICHIA-COLI; MURINE COLONIC HYPERPLASIA; CITROBACTER-RODENTIUM; PATHOGENICITY ISLAND; TRANSCRIPTIONAL REGULATION; III SECRETION; H-NS; BACTERIOPHAGE-LAMBDA; VIRULENCE GENES; ACTIVATOR SO - Journal of Bacteriology 2005 ;187(23):7918-7930 13115 UI - 3497 AU - Barbosa-Solomieu V AU - Degremont L AU - Vazquez-Juarez R AU - scencio-Valle F AU - Boudry P AU - Renault T AD - IFREMER, LGP, F-17390 La Tremblade, FranceCIBNOR, Marine Pathol Unit, La Paz 23000, BCS, MexicoRenault, T, IFREMER, LGP, F-17390 La Tremblade, France TI - Ostreid Herpesvirus 1 (OsHV-1) detection among three successive generations of Pacific oysters (Crassostrea gigas) AB - Ostreid Herpesvirus 1 (OsHV-1) was likely detected in Pacific oysters, Crassostrea gigas, at different stages of development. Viral infections were associated with high mortality rates in the spat and larvae. Furthermore, the persistance of OsHV-1 in asymptomatic adults was demonstrated by detection of viral DNA and proteins. In the present study. three successive. generations of C. gigas (G(0) and G(1) parental oysters, G(1) and G(2) larvae) were screened for OsHV-1 by PCR. Viral DNA was detected in 2-day-old larvae. indicating that infection may take place at very early stages. Although results strengthen the hypothesis of a vertical transmission. it was not possible to predict the issue of a particular type of cross. Indeed, the detection of viral DNA in parental oysters did not systematically correspond to a productive infection or result in a successful transmission to the progeny. However, the infective status of the parents appeared to have an influence on both the infection and the survival rates of the progeny. Crosses involving an OsHV-1 infected male and a non-infected female resulted in hatching and larval survival rates statistically lower than those observed in the other types of cross. These, results suggest that OsHV-1-infected females may transmit to their offspring some kind of protection or resistance against viral infection. (C) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Baja California Sur PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Virology U5 - J;Article AV - English IS - 0168-1702 UR - ISI:000226173000007 L2 - herpesvirus;oyster;Crassostrea gigas;polymerase chain reaction;viral detection;vertical transmission;HERPES-LIKE VIRUS; HATCHERY-REARED LARVAE; PENAEUS-MONODON; VERTICAL TRANSMISSION; WSSV; PCR; INFECTIONS; DISEASE; SPAT; DNA SO - Virus Research 2005 ;107(1):47-56 13116 UI - 609 AU - Barbosa PA AU - Canales F AU - Burdio JA AU - Lee FC AD - ABB Corp Res, CH-5405 Daettwil, SwitzerlandCtr Nacl Invest & Desarrollo Tecnol CENIDET, Cuernavaca 62050, Morelos, MexicoUniv Zaragoza, Zaragoza 50018, SpainVirginia Polytech Inst & State Univ, Ctr Power Elect Syst, Blacksburg, VA 24061, USABarbosa, PA, ABB Corp Res, CH-5405 Daettwil, Switzerland TI - A three-level converter and its application to power factor correction AB - The first part of this paper introduces a novel three-level dc-de converter topology. It is shown that a floating capacitor connected across the clamping diodes of a conventional three-level converter enables phase-shift control while retaining zero voltage switching. Design constraints and experimental results are shown for a 6-kW, 100-kHz dc-dc prototype. The second part of the paper discusses the same three-level topology operated as a single-stage front-end converter. In this application, the converter realizes power factor correction and de output voltage regulation. To ensure low harmonic distortion, the input currents are operated in discontinuous conduction mode, and the performance, including soft switching, is also verified on a 3-kW, 50-kHz ac-dc converter MH - Mexico|Morelos MH - Spain MH - Switzerland MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0885-8993 UR - ISI:000233263500012 L2 - distributed power systems (DPS);floating capacitor;AC-DC CONVERTERS SO - Ieee Transactions on Power Electronics 2005 ;20(6):1319-1327 13117 UI - 1836 AU - Barcenas ME AU - Rosell CA AD - Univ Las Amer, Puebla, MexicoCSIC, IATA, Inst Agrochem & Food Technol, Cereal Lab, Valencia, SpainRosell, CA, Univ Las Amer, Puebla, Mexico TI - Effect of HPMC addition on the microstructure, quality and aging of wheat bread AB - The effect of hydroxypropylmethylcellulose (HPMC) addition on a basic bread formulation is described. The effect of HPMC as bread improver and antistaling agent was analysed in terms of microstructure. Bread quality was assessed by physical parameters (volume, width/height ratio, moisture content and hardness), crumb grain structure (number of air cells, cells area and the ratio between cells area and total area) and sensory evaluation (appearance, aroma, taste and texture). Bread staling was determined by following both the hardness increase and the starch retrogradation during storage. The microstructure was analyzed by cryo scanning electron microscopy (cryo-SEM). The results confirm the ability of the HPMC for improving fresh bread quality and for delaying staling. The presence of HPMC decreased the hardening rate of the bread crumb and also retarded the amylopectin retrogradation. The microstructure analysis revealed the possible interaction between the HPMC and the bread constituents, which could partially explain the antistaling effect of this hydrocolloid. (C) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Puebla MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 14 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0268-005X UR - ISI:000230256400012 L2 - HPMC;hydrocolloid;bread quality;staling;sensory analysis;microstructure;FROZEN STORAGE; DOUGH RHEOLOGY; BAKING PROCESS; STARCH; HYDROCOLLOIDS; CRUMB; WATER; METHYLCELLULOSE; RETROGRADATION; IMPROVERS SO - Food Hydrocolloids 2005 ;19(6):1037-1043 13118 UI - 2640 AU - Barcenas NM AU - Unruh TB AU - Neven LG AD - Colegio Postgrad Ciencias Agr, Montecillo 56230, Edo Mex, MexicoWashington State Univ, Dept Entomol, Pullman, WA 99164, USAUSDA ARS, Yakima Agr Res Lab, Wapato, WA 98951, USABarcenas, NM, Colegio Postgrad Ciencias Agr, Montecillo 56230, Edo Mex, Mexico TI - DNA diagnostics to identify internal feeders (Lepidoptera : Tortricidae) of pome fruits of quarantine importance AB - A diagnostic polymerase chain reaction (PCR) method is presented for differentiating among the North American internal apple-feeding pests codling moth, Cydia pomonella (L.); oriental fruit moth, Grapholita molesta (Busek); lesser appleworm, Grapholita prunicora (Walsh); and cherry fruitworm, Grapholita packardi Zeller. An approximate to 470-bp fragment of mitochondrial cytochrome oxidase subunit I (COI) was sequenced in three to six specimens of each species. Consistent and diagnostic differences were observed among the species in two regions of COI from which forward and reverse primers were designed to amplify a 112-116-bp segment of the gene. The primer sets were used to selectively amplify DNA from specimens of diverse geographic origin for each corresponding target species. Protocols were adapted for conventional and quantitative PCR, the latter being substantially faster. The method was validated as a decision-making tool for quarantine identifications for Mexico by representatives of their phytosanitary agency (Sanidad Vegetal). The method can facilitate identification of intercepted internal feeding Lepidoptera in apple and pear for many other importing nations MH - Mexico|Estado De Mexico MH - USA PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0022-0493 UR - ISI:000228259000009 L2 - quantitative PCR;quarantine pests;rnitocbondrial COI;pome fruit;POLYMERASE-CHAIN-REACTION; MITOCHONDRIAL-DNA; DIPTERA; IDENTIFICATION; PHYLOGENY; CULICIDAE; SEQUENCES; PRIMER SO - Journal of Economic Entomology 2005 ;98(2):299-306 13119 UI - 1343 AU - Barchuk AH AU - Valiente-Banuet A AU - Diaz MP AD - Univ Nacl Cordoba, Fac Ciencias Agropecuarias, RA-5000 Cordoba, ArgentinaUniv Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Func & Aplicada, Mexico City 04510, DF, MexicoBarchuk, AH, Univ Nacl Cordoba, Fac Ciencias Agropecuarias, CC 509, RA-5000 Cordoba, Argentina TI - Effect of shrubs and seasonal variability of rainfall on the establishment of Aspidosperma quebracho-blanco in two edaphically contrasting environments AB - Three experiments were conducted to verify if an increase in environmental stress level would affect the interactions between two species of nurse shrubs and seedlings of Aspidosperma quebracho-blanco. This is a mesic species with a generalist distribution over an extensive environments gradient. The relationship between Larrea divaricata and seedlings of A. quebracho-blanco was studied in two contrasting soils, a silty loam soil with higher surface clay content and a sandy loam soil. The effect of seasonal variability of rainfall on the initial establishment of seedlings under the shade of L. divaricata was evaluated in three consecutive years. The effect of nurse plant shade was tested comparing two shrub species with different types of leaf life span (sclerophyllous-evergreen and leguminous-deciduous). The natural establishment of A. quebracho-blanco depended on shaded microsites, but not on the type of shade provided by different nurse shrubs. Emergence and initial establishment depended on interactions of soil type and seasonal rainfall variation with nurse plants. The importance of facilitation increased with clay soil (CS). Sandy soil was 'less humid' than CS under shrub shade. However, establishment success depends on opportune even rainfall distribution in interaction with nurse plant presence MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 5 U4 - Ecology U5 - J;Article AV - English IS - 1442-9985 UR - ISI:000231505500008 L2 - edaphic condition;experimental microsite;facilitation;nurse plant;sclerophyllous evergreen and deciduous shrub;seasonal precipitation;seedling survival;SONORAN DESERT; POSITIVE INTERACTIONS; SEMIARID ENVIRONMENT; NORTHERN PATAGONIA; PLANT-COMMUNITIES; LARREA-TRIDENTATA; SEEDLING GROWTH; NURSE SHRUBS; DRY CHACO; FACILITATION SO - Austral Ecology 2005 ;30(6):695-705 13120 UI - 2705 AU - Barea J AU - Frank A AU - Hirsch JG AU - Van Isacker P AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoGrand Accelerateur Natl Ions Lourds, F-14076 Caen, FranceBarea, J, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico TI - Nuclear masses set bounds on quantum chaos AB - It has been suggested that chaotic motion inside the nucleus may significantly limit the accuracy with which nuclear masses can be calculated. Using a power spectrum analysis we show that the inclusion of additional physical contributions in mass calculations, through many-body interactions or local information, removes the chaotic signal in the discrepancies between calculated and measured masses. Furthermore, a systematic application of global mass formulas and of a set of relationships among neighboring nuclei to more than 2000 nuclear masses allows one to set an unambiguous upper bound for the average errors in calculated masses, which turn out to be almost an order of magnitude smaller than estimated chaotic components MH - France MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 13 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000227838900021 L2 - BINDING-ENERGIES; TABLE SO - Physical Review Letters 2005 ;94(10): 13121 UI - 3197 AU - Barea J AU - Alonso CE AU - Arias JM AU - Jolie J AD - UNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Cologne, Inst Kernphys, D-50937 Cologne, GermanyBarea, J, UNAM, Inst Ciencias Nucl, Apartado 70-543, Mexico City 04510, DF, Mexico TI - One nucleon transfer operator and nuclear supersymmetry AB - The appropriate use of the interacting boson-fermion model one nucleon transfer operator in connection with nuclear supersymmetries is discussed. We emphasize that care must be taken in using the same coupling order, either l-s or s-l, in the odd particle creation operator appearing in the one nucleon transfer operator and in the wave function of the odd-A nucleus. As an example, we have recalculated consistently the one nucleon transfer strengths for the Pt-196-->Pt-195 one neutron pickup reaction which is the best known example of dynamical nuclear supersymmetry. In addition, we present for the same reaction the results of several calculations considering different truncations in the boson-fermion expansion of the fermion creation operator MH - Germany MH - Mexico|Distrito Federal MH - Spain PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000226701900020 L2 - BOSON-FERMION SYMMETRIES; MODEL SO - Physical Review C 2005 ;71(1): 13122 UI - 3491 AU - Bargar JR AU - Tebo BM AU - Bergmann U AU - Webb SM AU - Glatzel P AU - Chiu VQ AU - Villalobos M AD - Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309, USAUniv Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093, USAUniv Utrecht, Dept Inorgan Chem & Catalysis, NL-3584 CA Utrecht, NetherlandsNatl Autonomous Univ Mexico, Inst Geog, LAFQA, Environm Biogeochem Grp, Coyoacan 04510, DF, MexicoBargar, JR, Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA TI - Biotic and abiotic products of Mn(II) oxidation by spores of the marine Bacillus sp. strain SG-1 AB - Bacterial Mn(II) oxidization by spores of Bacillus, sp. strain SG-1 has been systematically probed over the time scale 0.22 to 77 days under in-situ conditions and at differing Mn(II) concentrations. Three complementary techniques, K-edge X-ray absorption near-edge spectroscopy (XANES), X-ray emission spectroscopy (XES), and in-situ synchrotron radiation-based X-ray diffraction (SR-XRD), have been utilized to examine time-dependent changes in Mn oxidation state, local-, and long-range structure in amorphous, crystalline, cell-bound, and solute Mn species. The primary solid biogenic product of Mn(II) oxidation is an X-ray amorphous oxide similar to delta-MnO2, which has a Mn oxidation state between 3.7 and 4.0. Reaction of Mn(II) with the primary biogenic oxide results in the production of abiotic secondary products, feitknechtite or a 10 Angstrom Na phyllomanganate. The identity of the secondary product depends upon the Mn(II) concentration as described by thermodynamic relations. A decrease in the dissolved Mn(II) concentration is followed by mineralogic transformation of the secondary products. Thus, Mn(II) appears to act as a reductant toward the biogenic oxide and to control the stability of secondary reaction products. Mineralogic changes similar to these are likely to be commonplace in natural settings where bacterial Mn(II) oxidation is occurring and may liberate sorbed metal ions or alter the rates of important Mn oxide surface-mediated processes such as the degradation of organic molecules. It is plausible that microbes may exploit such mineral transformation reactions to indirectly control specific chemical conditions in the vicinity of the cell MH - USA MH - Mexico|Distrito Federal MH - Netherlands PB - WASHINGTON: MINERALOGICAL SOC AMER RP - NOT IN FILE U3 - TC 21 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0003-004X UR - ISI:000226318500016 L2 - X-RAY-FLUORESCENCE; OXYGEN-EVOLVING COMPLEX; ACID ROCK DRAINAGE; MANGANESE OXIDES; PHOTOSYSTEM-II; CRYSTAL-STRUCTURES; EMISSION-SPECTRA; HYPORHEIC ZONE; MN; SPECTROSCOPY SO - American Mineralogist 2005 ;90(1):143-154 13123 UI - 1617 AU - Barile-Fabris LA AU - Sanchez ML AU - Redes JEO AU - Remus CR AU - Abud C AU - Jara LJ AU - Aranda L AU - Irazoque F AU - Galarza D AU - Rubio M AD - Hosp Especialidades CMNSKKI, Dept Rheumatol, Mexico City, DF, MexicoGen Hosp, Dept Rheumatol, Sonora, MexicoCtr Med Occidente, Dept Rheumatol, Guadalajara, SpainUniv Hosp, Dept Rheumatol, San Luis Potosi, MexicoCtr Med La Raza, Dept Rheumatol, Mexico City, DF, MexicoHosp Gen Zona, Dept Rheumatol, Monterrey, MexicoCtr Med 20 Novembre, Dept Rheumatol, Mexico City, DF, MexicoUniv Hosp, Dept Rheumatol, Monterrey, MexicoCtr Med La Raza, Dept Hematol, Mexico City, DF, Mexico TI - Effect of rituximab on the quality of life (QOL) of rheumatoid arthritis patients. Preliminary report MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - Mexico|San Luis Potosi MH - Mexico|Sonora MH - Spain PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0003-4967 UR - ISI:000229909102189 SO - Annals of the Rheumatic Diseases 2005 ;64():462-462 13124 UI - 2645 AU - Barker GP AU - Neumann-Coto M AU - Schneider H AU - Takane M AU - Tam BS AD - Univ Missouri, Dept Math, Kansas City, MO 64110, USAUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Wisconsin, Dept Math, Madison, WI 53706, USATamkang Univ, Dept Math, Tamsui 251, TaiwanBarker, GP, Univ Missouri, Dept Math, Kansas City, MO 64110, USA TI - Equilibria of pairs of nonlinear maps associated with cones AB - Let K-1, K-2 be closed, full, pointed convex cones in finite-dimensional real vector spaces of the same dimension, and let F : K-1 -> span K-2 be a homogeneous, continuous, K-2-convex map that satisfies F(partial derivative K-1) boolean AND int K-2 = 0 and FK1 boolean AND int K-2 = 0. Using an equivalent formulation of the Borsuk-Ulam theorem in algebraic topology, we show that we have F(K-1 \ {0}) boolean AND (-K-2) = 0 and K-2 subset of FK1. We also prove that if, in addition, G : K-1 -> span K-2 is any homogeneous, continuous map which is (K-1, K-2)-positive and K-2-concave, then there exist a unique real scalar omega(0) and a (up to scalar multiples) unique nonzero vector x(0) is an element of K-1 such that Gx(0) = omega(0)Fx(0), and moreover we have omega(0) > 0 and x(0) is an element of int K-1 and we also have a characterization of the scalar omega(0). Then, we reformulate the above result in the setting when K-1 is replaced by a compact convex set and recapture a classical result of Ky Fan on the equilibrium value of a finite system of convex and concave functions MH - Mexico|Distrito Federal MH - Taiwan MH - USA PB - BASEL: BIRKHAUSER VERLAG AG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0378-620X UR - ISI:000228137100003 L2 - proper cone;convex set;nonlinear map;equilibrium point;Ky Fan;Borsuk-Ulam;LINEAR-OPERATORS SO - Integral Equations and Operator Theory 2005 ;51(3):357-373 13125 UI - 1404 AU - Barmenkov YO AU - Kir'yanov AV AU - Andres MV AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Valencia, ICMUV, Dept Fis Aplicada, E-46100 Burjassot, SpainBarmenkov, YO, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - Dynamic Bragg gratings induced in erbium-doped fiber at phase-modulated beams' coupling AB - We present the results of an experimental study of dynamic amplitude and phase Bragg gratings induced in a heavy-doped erbium fiber at the wavelengths 1532 and 1538 nm under the 980-nm pumping. The technique of two phase-modulated beams' coupling was applied for an experimental measurement of the changes in refractive index and gain accompanying the gratings' formation in the fiber, and an analysis based on the Kramers-Kronig Relations for the fiber absorption/gain spectra and two-pass amplifying was performed for modeling these changes MH - Mexico|Guanajuato MH - Spain PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 6 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9197 UR - ISI:000231269700009 L2 - dynamic Bragg gratings;erbium-doped fiber;Kramers-Kronig relations;phase-modulated beams' coupling;LASER; ABSORPTION; AMPLIFIERS; GAIN SO - Ieee Journal of Quantum Electronics 2005 ;41(9):1176-1180 13126 UI - 3544 AU - Barmenkov YO AU - Kir'yanov AV AU - Mora J AU - Cruz JL AU - Andres MV AD - Ctr Invest Opt, Leon 37150, Gto, MexicoUniv Valencia, Dept Fis Aplicada, ICMUV, E-46100 Burjassot, Valencia, SpainBarmenkov, YO, Ctr Invest Opt, Leon 37150, Gto, Mexico TI - Continuous-wave and giant-pulse operations of a single-frequency erbium-doped fiber laser AB - We present a compact diode-pumped single-frequency single-polarization erbium-doped fiber laser with fiber Bragg gratings (FBGs) written in the active fiber itself. The single-polarization regime was obtained by applying, uni-axial stress to one of the two FBGs forming the cavity. The laser is shown to operate in two regimes-quasi-continuous-wave regime with a few-percent of modulation in the output power and a giant-pulse regime accessible under sinusoidal pump modulation MH - Mexico|Guanajuato MH - Spain PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Optics;Physics, Applied U5 - J;Article AV - English IS - 1041-1135 UR - ISI:000226063700009 L2 - continuous-wave (CW) regime;erbium (Er)-doped fiber laser;giant-pulse regime;single frequency laser;BRAGG GRATINGS; BIREFRINGENCE; PRESSURE; NM SO - Ieee Photonics Technology Letters 2005 ;17(1):28-30 13127 UI - 2136 AU - Barquero J AU - Fernandez E AU - Monnin M AU - Seidel JL AU - Segovia N AD - Univ Montpellier 2, CNRS, F-34095 Montpellier, FranceUniv Nacl, UNA, OVSICORI, Observ Vulcanol & Sismol Costa Rica, Heredia, Costa RicaInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoMonnin, M, Univ Montpellier 2, CNRS, F-34095 Montpellier, France TI - Water chemistry and soil radon survey at the Poas volcano (Costa Rica) AB - Radon-in-soil monitoring at the Poas volcano (Costa Rica) has been performed together with water chemistry from the hot crater lake since 1981 and 1983 respectively. The results are discussed as a function of the eruptive evolution of the volcano over a 13 years period (1981-1994). It is shown that no definitely clear precursory radon signals have been recorded. On the contrary, ionic species concentrations are likely to be considered good precursors, together with the temperature variations of the crater lake water MH - Costa Rica MH - France MH - Mexico|Distrito Federal PB - BOLOGNA: EDITRICE COMPOSITORI BOLOGNA RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 1593-5213 UR - ISI:000229455500005 L2 - Poas volcano;geochemistry;radon;precursor;CRATER LAKE SO - Annals of Geophysics 2005 ;48(1):33-42 13128 UI - 191 AU - Barquero R AU - Edwards TM AU - Iniguez MP AU - Vega-Carrillo HR AD - Univ Valladolid, Hosp Rio Hortega, Valladolid, SpainUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, Valladolid, SpainUAs Estudios Nucl Ingn Elect Matemat, Zacatecas 98000, MexicoBarquero, R, Univ Valladolid, Hosp Rio Hortega, Valladolid, Spain TI - Monte Carlo simulation estimates of neutron doses to critical organs of a patient undergoing 18 MV x-ray LINAC-based radiotherapy AB - Absorbed photoneutron dose to patients undergoing 18 MV x-ray therapy was studied using Monte Carlo simulations based on the MCNPX code. Two separate transport simulations were conducted, one for the photoneutron contribution and another for neutron capture gamma rays. The phantom model used was of a female patient receiving a four-field pelvic box treatment. Photoneutron doses were determinate to be higher for organs and tissues located inside the treatment field, especially those closest to the patient's skin. The maximum organ equivalent dose per x-ray treatment dose achieved within each treatment port was 719 ASv/Gy to the rectum (180 degrees field), 190 ASv/Gy to the intestine wall (0 degrees field), 51 mu Sv/Gy to the colon wall (90 degrees field), and 45 mu Sv/Gy to the skin ( 270 degrees field). The maximum neutron equivalent dose per x-ray treatment dose received by organs outside the treatment field was 65 ASv/Gy to the skin in the antero-posterior field. A mean value of 5 +/- 2 mu Sv/Gy was obtained for organs distant from the treatment field. Distant organ neutron equivalent doses are all of the same order of magnitude and constitute a good estimate of deep organ neutron equivalent doses. Using the risk assessment method of the ICRP-60 report, the greatest likelihood of fatal secondary cancer for a 70 Gy dose is estimated to be 0.02% for the pelvic postero-anterior field, the rectum being the organ representing the maximum contribution of 0.011%. (c) 2005 American Association of Physicists in Medicine MH - Mexico|Zacatecas MH - Spain PB - MELVILLE: AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS RP - NOT IN FILE U3 - TC 3 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0094-2405 UR - ISI:000234643700008 L2 - accelerator neutron source;photon contamination;neutron dosimetry;Monte Carlo calculations;MCNP;PHOTON BEAMS; PHOTONEUTRONS; ACCELERATOR; SIEMENS SO - Medical Physics 2005 ;32(12):3579-3588 13129 UI - 3615 AU - Barquero R AU - Mendez R AU - Vega-Carrillo HR AU - Iniguez MP AU - Edwards TM AD - Univ Valladolid, Hosp Rio Hortega, Valladolid 47014, SpainUniv Valladolid, Dept Fis Teor Atom Mol & Nucl, Valladolid 47014, SpainUAs Estudios Nucl, Zacatecas 98000, Zac, MexicoBarquero, R, Univ Valladolid, Hosp Rio Hortega, S-N Protecc Radiol, Valladolid 47014, Spain TI - Neutron spectra and dosimetric features around an 18 MV Linac accelerator AB - Using the difference between responses to neutrons of TLD-600 and TLD-700, three experimental devices were constructed and arranged to measure thermal neutron fluences, neutron spectra, and neutron doses inside the treatment room of a radiotherapy 18 MV Linear electron accelerator (Linac). Thermal neutron fluences were measured with TLD600/TLD-700 pairs arranged in both a bare and a cadmium (Cd) foil covered methacrylate box. Neutron spectra were measured in 26 energy bins by introducing pairs of TLD-600/ TLD-700 in air and into the middle of five polyethylene spheres with diameters of 3, 5, 8, 10, and 12 inches. A PC version of the BUNKI code was used to unfold the six measurements in each sphere to obtain the 26 energy bins. Neutron and photon doses were measured by introducing pairs of TLD-600/TLD-700 into the middle of a single 25-cm-diameter paraffin sphere. The three required neutron calibrations were carried out at the Nuclear Technology Laboratory of the Polytechnique University of Madrid (UPM), using an Am-241-Be neutron source with an alpha activity of 111 GBq and a yield of 6.6 x 10(6) neutrons s(-1). Three devices were needed for the necessary calibrations: a BF3 counter for the thermal neutron fluence calibration, a LUDLUM 42-5 Bonner spectrometer with five 0.95 g cm(-3) polyethylene spheres with a LiI(Eu) 4 x 4 mm(2) scintillation counter for the neutron spectrometer calibration and a NEMO 9140 remmeter for the paraffin remmeter calibration. The Monte Carlo code MCNP 4C has been used in two ways: to calculate the neutron kerma contribution to two TLDs (type 600 and 700) both in air and inside the paraffin sphere, and to determine the neutron spectra at those Linac room zones where the neutron spectra were measured. Thermal neutron fluences of 2.9 x 10(4) +/- 8.6 x 10(3) cm(-2) s(-1), measured around the Linac head plane, and 2.3 x 10(4 +/-) 2.3 x 10(3) cm(-2) s(-1), measured at the patient couch plane, are in agreement with previous independent measurements from other authors. The calculated and measured neutron spectra obtained in the treatment room showed three distinct regions: a peak around 0.1 MeV, a flat epithermal region and a thermal region with values similar to those mentioned above. Patient dose equivalents of 0.5 mSv and 5 mSv from neutrons and photons, respectively, were obtained per treatment Gray MH - Mexico|Zacatecas MH - Spain PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 7 U4 - Environmental Sciences;Environmental Studies;Public, Environmental & Occupational Health;Nuclear Science & Technology;Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0017-9078 UR - ISI:000225865700005 L2 - spectrometry;neutron;accelerators;neutron dosimetry;Monte Carlo;MEDICAL ACCELERATOR; LINEAR-ACCELERATOR; ENERGY-SPECTRA; PHOTONEUTRONS; DETECTORS; FIELD; MAZE SO - Health Physics 2005 ;88(1):48-58 13130 UI - 61 AU - Barra F AU - Ruiz J AU - Valencia VA AU - Ochoa-Landin L AU - Chesley JT AU - Zurcher L AD - Univ Arizona, Dept Geosci, Tucson, AZ 85721, USAConcepcion Univ, Inst Geol Econ Aplicada, Concepcion, ChileUniv Sonora, Dept Geol, Hermosillo, Sonora, MexicoBarra, F, Univ Arizona, Dept Geosci, Tucson, AZ 85721, USA TI - Laramide porphyry Cu-Mo mineralization in northern Mexico: Age constraints from Re-Os geochronology in molybdenite AB - Twenty-five new Re-Os molybdenite ages for nine porphyry copper-molybdenunr deposits from northern Mexico constrain the timing of mineralization and the longevity of porphyry systems in this region. The ages of all the deposits are between 50 and 61 Ma (i.e., Paleocene to early Eocene) and are associated with tire Laramide orogeny. The oldest deposits are those from the Cananea district and include the El Alacran prospect (similar to 61. Ma), the Maria deposit (60 Ma), the current Cananea mine, and L a Colorada breccia (similar to 59 Ma). The age of mineralization at Cumobabi also is 59 Ma, and it was followed by tire emplacement of deposits at Suaqui Verde and Cuatro Hermanos at about 57 to 56 Ma. The Malpica prospect, the southernmost porphyry copper prospect in western Mexico, was emplaced at 54 Ma. The La Caridad deposit in Nacozari and the El Creston prospect both have Re-Os molybdenite ages of 54 Ma. The Tameapa prospect has a protracted hydrothermal mineralization history with multiple molybdenite mineralization events at similar to 57, 52 to 53, and 50 Ma. Total Re and Os-187 concentrations for molybdenites range from 10,424 to 26 ppm and from 6,641 to 1.4 ppb, respectively. The deposit with the highest Re and Os concentrations is El Alacran, and the lowest concentrations are found in El Creston. The ages determined support the formation of porphyry copper deposits in northern Mexico during the Laramide orogeny. In general, the ages of porphyry copper deposits in the North American province range from similar to 76 Ma at Bagdad, Arizona, to similar to 50 Ma at Tameapa, Sinaloa. The ages also show that porphyry copper mineralization occurred continously between these two dates, with two main episodes at similar to 60 Ma (Cananea district, Mexico, and Sierrita and Copper Creek, United States) and at similar to 54 Ma (La Caridad, El Creston, Malpica in Mexico and Morenci, United States) MH - Chile MH - Mexico|Sonora MH - USA PB - LITTLETON: SOC ECONOMIC GEOLOGISTS, INC RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0361-0128 UR - ISI:000237078800007 L2 - COPPER-DEPOSITS; RHENIUM; OSMIUM; MAGMATISM; ARIZONA; AMERICA; SONORA; TECTONICS; DISTRICT; TERRANES SO - Economic Geology 2005 ;100(8):1605-1616 13131 UI - 131 AU - Barradas HR AU - Bert D AD - Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, MexicoLSR IMAG, Lab Logiciels Syst Reseaux, Grenoble, FranceBarradas, HR, Univ Autonoma Metropolitana Azcapotzalco, Mexico City 13, DF, Mexico TI - A fixpoint semantics of event systems with and without fairness assumptions AB - We present a fixpoint semantics of event systems. The semantics is presented in a general framework without concerns of fairness. Soundness and completeness of rules for deriving leads-to properties are proved in this general framework. The general framework is instantiated to minimal progress and weak fairness assumptions and similar results are obtained. We show the power of these results by deriving sufficient conditions for leads-to under minimal progress proving soundness of proof obligations without reasoning over state-traces MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000234830600019 L2 - liveness properties;event systems;action systems;UNITY logic;fairness;weak fairness;minimal progress;set transformer;fixpoints;PARALLEL PROGRAMS; CALCULUS SO - Integrated Formal Methods, Proceedings 2005 ;3771():327-346 13132 UI - 1622 AU - Barradas VL AU - Nicolas E AU - Torrecillas A AU - Alarcon JJ AD - CSIC, Unidad Asociada Hort Sostenible Zonas Aridas, UPCT CEBAS, Madrid, SpainUNAM, Inst Ecol, Dept Ecol Funct, Mexico City 04510, DF, MexicoCSIC, Dept Riego, Ctr Edafol & Biol Aplicada Segura, E-30100 Murcia, SpainAlarcon, JJ, CSIC, Unidad Asociada Hort Sostenible Zonas Aridas, UPCT CEBAS, Madrid, Spain TI - Transpiration and canopy conductance in young apricot (Prunus armenica L.) trees subjected to different PAR levels and water stress AB - Water use and canopy conductance were monitored in 2-year-old apricot (Prunus armenica L.) trees growing in 70-L plastic pots. The experiment was carried out in a research field near Murcia, Spain, over a 3-week period between September 26 and October 16, 2000. Eight trees were used in the experiment, four of which were placed under a rectangular shading net, while the other four were maintained in the open air. Trees were irrigated adequately until October 5 (day 279); later the water was withheld in all trees for five days. The estimation of transpiration from sap flow measurements was done under both radiation conditions along the experiment, recording a significant decrease of transpiration in shaded trees with respect to the exposed trees. The mild water stress affected the exposed and shaded plants in a similar manner. In both cases, the water deficit induced a significant reduction of transpiration after two days of water withholding. Total conductance was obtained from daily measurements of transpiration and vapor pressure deficit between September 28 and October 10. and was similar to canopy conductance. Maximum canopy conductance showed the lowest values at the end of mild water stress (October 10) (0.0017 and 0.0012 m s(-1), shaded and sunny, respectively), and the highest values on September 28 when the trees were in well-irrigated condition (0.0024 and 0.0018 ms(-1), shaded and sunny, respectively). Finally, the decoupling coefficient reached the highest values in the shaded trees and the lowest in sun-exposed trees. The results showed that water vapor exchange was strongly dominated by vapor pressure deficit and controlled by leaf conductance. It was also noticeable that trees under shade were more decoupled from the atmosphere than those fully exposed to the sun, meaning that exposed trees resulted in a better control of water loss. We think that net shading could be extended to apricot culture in many areas in which irrigation water is scarce and insolation is high, because the water use clearly decreased in shaded trees with respect to the exposed ones. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Water Resources U5 - J;Article AV - English IS - 0378-3774 UR - ISI:000230868100021 L2 - decoupling coefficient;irradiance;leaf water potential;mild water stress;stomatal conductance SO - Agricultural Water Management 2005 ;77(1-3):323-333 13133 UI - 2303 AU - Barrado E AU - Rodriguez JA AU - Prieto F AU - Medina J AD - Univ Valladolid, Fac Ciencias, Dept Quim Analit, E-47005 Valladolid, SpainUniv Autonoma Estado Hidalgo, Ctr Invest Quim, Hidalgo 42076, MexicoUniv Valladolid, Fac Ciencias, Dept Fis Mat Condensada Cristalog & Mineral, E-47005 Valladolid, SpainBarrado, E, Univ Valladolid, Fac Ciencias, Dept Quim Analit, E-47005 Valladolid, Spain TI - Characterization of iron oxides embedded in silica gel obtained by two different methods AB - A new way of obtaining iron oxides embedded in amorphous silica gel matrices using Fe, oxygen and tetraethoxysilane (TEOS) as precursors is described. The product of this new method was compared to the compound produced when hydrochemically synthesized iron ferrite (magnetite) was directly embedded in silicon oxide (SiO2). The two xerogels were characterized and found to differ substantially. The compound obtained using the first procedure is amorphous iron oxide-hydroxide embedded in silica gel and lacks magnetic properties. In contrast, the silicon oxide particles in the second compound become partly coated by the magnetite, such that its magnetic properties are similar to those of magnetite proper. © 2005 Elsevier B.V. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Ceramics;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 0022-3093 UR - ISI:000228953100017 L2 - CONTAINING WASTE-WATER; PARTICLES; PURIFICATION; SPECTROSCOPY; OPTIMIZATION; AEROGELS; DESIGN SO - Journal of Non-Crystalline Solids 2005 ;351(10-11):906-914 13134 UI - 2341 AU - Barragan-Campos HM AU - Vallee JN AU - Lo D AU - Barrera-Ramirez CF AU - rgote-Greene M AU - Sanchez-Guerrero J AU - Estanol B AU - Guillevin R AU - Chiras J AD - Grp Hosp Pitie Salpetriere, Serv Neuroradiol Prof Jacques Chiras, F-75651 Paris, FranceInst Nacl Ciencias Med & Nutr Salvador, Dept Radiol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador, Dept Internal Med, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador, Dept Surg, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador, Dept Rheumatol Immunol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador, Dept Neurol, Mexico City, DF, MexicoBarragan-Campos, HM, Grp Hosp Pitie Salpetriere, Serv Neuroradiol Prof Jacques Chiras, 47-83 Blvd Hop, F-75651 Paris, France TI - Brain magnetic resonance imaging findings in patients with mitochondrial cytopathies AB - Background: Mitochondrial cytopathies (MCs) are a heterogeneous group of clinical entities, sortie of which have classic phenotypes. Magnetic resonance imaging (MRI) has been reported to be helpful in the diagnosis of MC. Objective: To correlate the most common brain MRI findings reported in patients with MC with the clinical findings in patients in different, MC subgroups. Design: Case series. Setting: Patients with MCs seen at the Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Mexico City, Mexico. Patients: Twenty-one patients with MC with the following phenotypes: chronic progressive external ophthalmoplegia (n = 7), Kearns-Sayre syndrome (n = 7), mitochondrial neurogastrointestinal encephalopathy (n = 6), and myoclonic epilepsy with ragged red fiber myopathy (n = 1). Results: Brain MRI abnormalities were found in 20 (95%) of 21 patients. The most frequent abnormalities were widespread white matter hyperintensity in 19 patients (90%), supratentorial cortical atrophy in 18 patients (86%), and cerebellar atrophy in 13 patients (62%). Widespread white matter hyperintensity (P<.001) and supratentorial cortical atrophy (P=.001) were each correlated significantly with MC. Subsequent subgroup analyses showed that the absence of basal ganglia hyperintensity was correlated with Kearns-Sayre syndrome (P<.001) and the presence of supratentorial cortical atrophy was correlated with mitochondrial neurogastrointestinal encephalopathy (P=.005). Conclusions: The presence of widespread white matter hyperintensity and/or supratentorial cortical atrophy in brain MRI may help to establish the diagnosis of MC. The radiologist has a role to play in the workup of MC by confirming the diagnosis and possibly distinguishing different subgroups of MC MH - France MH - Mexico|Distrito Federal PB - CHICAGO: AMER MEDICAL ASSOC RP - NOT IN FILE U3 - TC 11 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0003-9942 UR - ISI:000229047700005 L2 - KEARNS-SAYRE-SYNDROME; PROGRESSIVE EXTERNAL OPHTHALMOPLEGIA; STROKE-LIKE EPISODES; LACTIC-ACIDOSIS; DNA; MYOPATHY; MR; ENCEPHALOPATHY; DISORDERS; MELAS SO - Archives of Neurology 2005 ;62(5):737-742 13135 UI - 227 AU - Barranco J AU - Miranda OG AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoRussian Acad Sci, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk 142190, Moscow Region, RussiaMax Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, GermanyBarranco, J, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal 14-740, Mexico City 07000, DF, Mexico TI - Probing new physics with coherent neutrino scattering off nuclei AB - The possibility off measuring for the first time neutrino-nuclei coherent scattering has been recently discussed by several experimental collaborations. It is shown that such a measurement may be very sensitive to non-standard interactions of neutrinos with quarks and might set better constraints than those coming from future neutrino factory experiments. We also comment on other types of new physics tests, such as extra heavy neutral gauge bosons, where the sensitivity to some models is slightly better than the Tevatron constraint and, therefore, could give complementary bounds MH - Germany MH - Mexico|Distrito Federal MH - Russia PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 0 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1126-6708 UR - ISI:000234353700024 L2 - neutrino physics;neutrino detectors and telescopes;beyond standard model;MASSLESS NEUTRINOS; STANDARD MODEL; MATTER; SPECTRUM; DETECTOR; MASSES SO - Journal of High Energy Physics 2005 ;(12): 13136 UI - 1952 AU - Barrios-Ceballos MP AU - Martinez-Gallardo NA AU - naya-Velazquez F AU - Mirelman D AU - Padilla-Vaca F AD - Univ Guanajuato, Fac Quim, Inst Invest Biol Expt, Guanajuato 36050, MexicoIPN, Ctr Invest & Estudios Avanzados, Dept Biotecnol & Bioquim, Guanajuato 36050, MexicoWeizmann Inst Sci, Dept Biol Sci, IL-76100 Rehovot, IsraelPadilla-Vaca, F, Univ Guanajuato, Fac Quim, Inst Invest Biol Expt, Guanajuato 36050, Mexico TI - A novel protease from Entamoeba histolytica homologous to members of the family S28 of serine proteases AB - Serine proteases are one of the biologically most important and widely distributed enzyme families. A protease capable of degrading the substrate Sue-AAF-AMC was isolated from axenically grown trophozoites of Entamoeba histolytica. The enzyme was purified by ion-exchange chromatography and electroelution, and appeared on 2D-PAGE as a spot of 60 kDa and pI of 4.65. Data obtained from zymogram Suggest the active protease is present either as homodimer (1 30kDa) or homotetramer (250kDa). The optimal temperature of the enzyme was 37 degrees C, and it exhibited activity over a broad pH range. The protease was strongly inhibited by TPCK and chelating agents. The enzymatic activity was restored upon addition of calcium. BLAST analysis with the sequence of internal peptides of the protein revealed two open reading frames within the genome of E histolytica, homologous to members of the family S28, clan SC of serine proteases. (c) 2005 Elsevier Inc. All rights reserved MH - Israel MH - Mexico|Guanajuato PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Parasitology U5 - J;Article AV - English IS - 0014-4894 UR - ISI:000230067400019 L2 - Suc-AAF-AMC;N-succinyl-L-Ala-L-Ala-L-Phe-7-amido-4-methylcoumarin;E-64,1-trans-epoxysuccinyl-L-leucilamide-(4-guanidine)-butane;Entainoeba histollytica;serine protease;family S28;PLASMODIUM-FALCIPARUM; TRYPANOSOMA-CRUZI; PROTEINASE; PEPTIDASE; INVASION SO - Experimental Parasitology 2005 ;110(3):270-275 13137 UI - 1671 AU - Barron-Gafford G AU - Martens D AU - Grieve K AU - Biel K AU - Kudeyarov V AU - Mclain JET AU - Lipson D AU - Murthy R AD - Univ Arizona, Tucson, AZ 85719, USAColumbia Univ, Oracle, AZ 85621, USAUSDA, ARS, SW Watershed Res Ctr, Tucson, AZ 85719, USAUniv Washington, Seattle, WA 98195, USARussian Acad Sci, Inst Basic Biol Problems, Pushchino 142290, Moscow Region, RussiaCtr Invest Food & Dev, Hermosillo, Sonora, MexicoSan Diego State Univ, Dept Biol, San Diego, CA 92182, USAColumbia Univ, Dept Earth & Environm Sci, Lamont Doherty Earth Observ, Biosphere 2, Oracle, AZ 85621, USABarron-Gafford, G, Univ Arizona, Tucson, AZ 85719, USA TI - Growth of eastern cottonwoods (Populus deltoides) in elevated [CO2] stimulates stand-level respiration and rhizodeposition of carbohydrates, accelerates soil nutrient depletion, yet stimulates above- and belowground biomass production AB - We took advantage of the distinctive system-level measurement capabilities of the Biosphere 2 Laboratory (B2L) to examine the effects of prolonged exposure to elevated [CO2] on carbon flux dynamics, above- and belowground biomass changes, and soil carbon and nutrient capital in plantation forest stands over 4 years. Annually coppiced stands of eastern cottonwoods (Populus deltoides) were grown under ambient (400 ppm) and two levels of elevated (800 and 1200 ppm) atmospheric [CO2] in carbon and N-replete soils of the Intensive Forestry Mesocosm in the B2L. The large semiclosed space of B2L uniquely enabled precise CO2 exchange measurements at the near ecosystem scale. Highly controllable climatic conditions within B2L also allowed for reproducible examination of CO2 exchange under different scales in space and time. Elevated [CO2] significantly stimulated whole-system maximum net CO2 influx by an average of 21% and 83% in years 3 and 4 of the experiment. Over the 4-year experiment, cumulative belowground, foliar, and total aboveground biomass increased in both elevated [CO2] treatments. After 2 years of growth at elevated [CO2], early season stand respiration was decoupled from CO2 influx aboveground, presumably because of accelerated fine root production from stored carbohydrates in the coppiced system prior to canopy development and to the increased soil carbohydrate status under elevated [CO2] treatments. Soil respiration was stimulated by elevated [CO2] whether measured at the system level in the undisturbed soil block, by soil collars in situ, or by substrate-induced respiration in vitro. Elevated [CO2] accelerated depletion of soil nutrients, phosphorus, calcium and potassium, after 3 years of growth, litter removal, and coppicing, especially in the upper soil profile, although total N showed no change. Enhancement of above- and belowground biomass production by elevated [CO2] accelerated carbon cycling through the coppiced system and did not sequester additional carbon in the soil MH - Mexico|Sonora MH - Russia MH - USA PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 9 U4 - Biodiversity Conservation;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 1354-1013 UR - ISI:000230726600003 L2 - poplars;soil carbohydrates;soil nutrient depletion;stand-level CO2 exchange;ATMOSPHERIC CARBON-DIOXIDE; LEAF RESPIRATION; FOREST ECOSYSTEMS; NITROGEN DYNAMICS; N FERTILIZATION; FINE ROOTS; ENRICHMENT; RESPONSES; AVAILABILITY; SYSTEM SO - Global Change Biology 2005 ;11(8):1220-1233 13138 UI - 44 AU - Barros J AU - Ros-Yanez T AU - Colas R AU - Houbaert Y AD - Univ Ghent, Dept Met & Sci Mat, B-9052 Ghent, BelgiumUniv Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, NL, MexicoBarros, J, Univ Ghent, Dept Met & Sci Mat, Technol Pk 903, B-9052 Ghent, Belgium TI - Study of the workability and room temperature straining behaviour of high silicon steel (4 wt% Si) by means of compression tests AB - Series of silicon alloys (from 3.3 to 6.3% wt Si) were produced to study their workability at room temperature. Cast samples, machined into cylinders, were compressed with a servo-hydraulic Computer driven machine at a constant strain rate. The results supplied information about the strengthening, phenomena and confirmed that the workability decreases with the higher silicon content. In addition constitutive equations were fitted from the stress-strain data. Metallographic examination showed twins which density increased with the percentage of Si MH - Belgium MH - Mexico|Nuevo Leon PB - MADRID: CENIM RP - NOT IN FILE U3 - TC 0 U4 - Metallurgy & Metallurgical Engineering U5 - J;Article AV - Spanish IS - 0034-8570 UR - ISI:000237464800019 L2 - mechanical properties;twining;microstructure SO - Revista de Metalurgia 2005 ;():116-120 13139 UI - 2875 AU - Barrot C AU - Sanchez C AU - Ortega M AU - Gonzalez-Martin A AU - Brand-Casadevall C AU - Gorostiza A AU - Huguet E AU - Corbella J AU - Gene M AD - Univ Barcelona, Fac Med, Dept Legal Med, Forens Genet Lab, Barcelona 08036, Catalonia, SpainAutonomous Univ Hidalgo State, Hist & Anthropol Area, Pachuca, MexicoLegal Med Inst, Lausanne, SwitzerlandUniv Barcelona, Bellvitge Hosp, Fac Med, Catalonia, SpainBarrot, C, Univ Barcelona, Fac Med, Dept Legal Med, Forens Genet Lab, C Casanova 143, Barcelona 08036, Catalonia, Spain TI - Characterisation of three Amerindian populations from Hidalgo State (Mexico) by 15 STR-PCR polymorphisms AB - The purpose of this study is to report allele frequency data of three ethnic Amerindian population samples: the Otomi (Hna-hnu) from eastern Sierra Madre and Ixmiquilpan valley and the Huasteco from La Huasteca. These groups were characterised by 15 STR-PCR polymorphisms (HumTH01, HumvWA, D18S51, HumTPOX, D19S433, D16S539, D13S317, D8S1179, D7S820, D5S818, HumFGA, CSF1PO, D2S1338, D3S1358 and D21S11). No significant deviations in observed allelic frequencies from Hardy-Weinberg equilibrium were found for all the studied systems. From the forensic point of view, the heterozygosity value, power of discrimination and the a priori chance of exclusion were calculated MH - Mexico|Hidalgo MH - Spain MH - Switzerland PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 4 U4 - Medicine, Legal U5 - J;Article AV - English IS - 0937-9827 UR - ISI:000227425600012 L2 - population genetics;Amerindian;STR polymorphisms;Otomi;Huasteco;HLA-DQ-ALPHA; HUMVWA31A; HUMTH01; YNZ22; LOCI; DNA SO - International Journal of Legal Medicine 2005 ;119(2):111-115 13140 UI - 768 AU - Bartolome J AU - Lopez ZG AU - Broncano MJ AU - Plaixats J AD - Univ Autonoma Barcelona, Dept Ciencia Anim & Aliments, Grp Recerca Remugants, Bellaterra 08193, SpainColegio Postgrad, Puebla 721302, MexicoBartolome, J, Univ Autonoma Barcelona, Dept Ciencia Anim & Aliments, Grp Recerca Remugants, Bellaterra 08193, Spain TI - Grassland colonization by Erica scoparia (L.) in the Montseny Biosphere Reserve (Spain) after land-use changes AB - In a heathland pasture in the Montseny Biosphere Reserve and Natural Park (NE Spain) the replacement of traditional burning by shrub harvesting has lead to encroachment on intermixed dry grasslands by Erica scoparia. Permanent in situ quadrats were used at two study sites from Spring 2001 to Spring 2003. Orientation, percentage of bare ground, grass cover, distance from mature plants and morphometry of seedlings were recorded in order to determine their influence on distribution, structure, abundance and seedling survival. Results showed that E. scoparia seedlings grow mainly on the first metres at the edge of the heathland with a clear spatial aggregation pattern. Factors such as the percentage of bare ground, grass cover, distance to the nearest neighbour, age and height of mature plants located at the edge of the heathland influenced the colonizing patterns. A higher harvesting frequency at the heathland border and a reduction in grazing pressure on the patches of grassland are proposed as sustainable management strategies to prevent encroachment and conserve the grassland. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Puebla MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Multidisciplinary;Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0167-8809 UR - ISI:000232902200021 L2 - heathland;pasture conservation;seedling;recruitment;disturbance SO - Agriculture Ecosystems & Environment 2005 ;111(1-4):253-260 13141 UI - 3371 AU - Baruch IS AU - Georgieva P AU - Barrera-Cortes J AU - de Azevedo SF AD - IPN, CINVESTAV, Dept Automat Control, Mexico City 07360, DF, MexicoUniv Aveiro, Dept Elect & Telecommun, P-3810193 Aveiro, PortugalIPN, CINVESTAV, Dept Biotechnol & Bioengn, Mexico City 07360, DF, MexicoUniv Porto, Fac Engn, Dept Chem Engn, P-4200465 Oporto, PortugalBaruch, IS, IPN, CINVESTAV, Dept Automat Control, Ave IPN 2508,Ap 14-470, Mexico City 07360, DF, Mexico TI - Adaptive recurrent neural network control of biological wastewater treatment AB - Three adaptive neural network control structures to regulate a biological wastewater treatment process are introduced: indirect, inverse model, and direct adaptive neural control. The objective is to keep the concentration of the recycled biomass proportional to the influent flow rate in the presence of periodically acting disturbances, process parameter variations, and measurement noise. This is achieved by the so-called Jordan Canonical Recurrent Trainable Neural Network, which is a completely parallel and parametric neural structure, permitting the use of the obtained parameters, during the learning phase, directly for control system design. Comparative simulation results confirmed the applicability of the proposed control schemes. (C) 2005 Wiley Periodicals, Inc MH - Mexico|Distrito Federal MH - Portugal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 3 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0884-8173 UR - ISI:000226485100004 L2 - SYSTEMS; OPTIMIZATION SO - International Journal of Intelligent Systems 2005 ;20(2):173-193 13142 UI - 3162 AU - Barway S AU - Mayya YD AU - Kembhavi AK AU - Pandey SK AD - Pandit Ravishankar Shukla Univ, Sch Studies Phys, Raipur 492010, Madhya Pradesh, IndiaInst Nacl Astrofis Opt & Elect, Tonantzintla 72000, Pue, MexicoInteruniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, IndiaPandit Ravishankar Shukla Univ, Sch Studies Phys, Raipur 492010, Madhya Pradesh, IndiaBarway, S, Pandit Ravishankar Shukla Univ, Sch Studies Phys, Raipur 492010, Madhya Pradesh, India TI - Multicolor surface photometry of lenticular galaxies. I. The data AB - We present multicolor surface and aperture photometry in the B, V, R, and K' bands for a sample of 34 lenticular galaxies from the Uppsala General Catalogue. From surface photometric analysis, we obtain radial profiles of surface brightness, colors, ellipticity, position angle, and the Fourier coefficients that describe the departure of isophotal shapes from a purely elliptical form; we find the presence of dust lanes, patches, and ringlike structure in several galaxies in the sample. We obtain total integrated magnitudes and colors and find that these are in good agreement with the values from the Third Reference Catalogue. Isophotal colors are correlated with each other, following the sequence expected for early-type galaxies. The color gradients in lenticular galaxies are more negative than the corresponding gradients in elliptical galaxies. There is a good correlation between B-V and B-R color gradients, and the mean gradients in the B-V, B-R, and V K' colors are -0.13 +/- 0.06, -0.18 +/- 0.06, and -0.25 +/- 0.11 mag dex(-1) in radius, respectively MH - India MH - Mexico|Puebla PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000226852900006 L2 - galaxies : elliptical and lenticular, cD;galaxies : fundamental parameters;galaxies : photometry;ELLIPTIC GALAXIES; S0 GALAXIES; SPIRAL GALAXIES; COLOR DISTRIBUTIONS; INTERSTELLAR MATTER; SEYFERT-GALAXIES; STANDARD STARS; E-S0 GALAXIES; CCD; DISKS SO - Astronomical Journal 2005 ;129(2):630-646 13143 UI - 2583 AU - Baselga J AU - Carbonell X AU - Castaneda-Soto NJ AU - Clemens M AU - Green M AU - Harvey V AU - Morales S AU - Barton C AU - Ghahramani P AD - Univ Hosp, Dept Med Oncol, E-08035 Barcelona, SpainHosp Arnau Vilanova, Lleida, SpainInst Nacl Cancerol, Tialpan, MexicoMutterhaus Borromaeerinnen, Trier, GermanyRoyal Melbourne Hosp, Melbourne, Vic, AustraliaAuckland Hosp, Auckland, New ZealandRoche Prod Ltd, Welwyn Garden City AL7 3AY, Herts, EnglandBaselga, J, Univ Hosp, Dept Med Oncol, Pg Val Hebron,119-129, E-08035 Barcelona, Spain TI - Phase II study of efficacy, safety, and pharmacokinetics of trastuzumab monotherapy administered on a 3-weekly schedule AB - Purpose This phase II study investigated the efficacy, safety, and pharmacokinetics of trastuzumab monotherapy given as first-line treatment once every 3 weeks (3-weekly) in women with human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer (MBC). Patients and Methods Patients with previously untreated HER2-positive MBC received a loading dose of trastuzumab, 8 mg/kg intravenously (IV) and then 6 mg/kg IV at 3-week intervals until disease progression or patient withdrawal. Results In total, 105 patients received a median of five cycles of therapy (range, 1 to 35+). The overall response rate was 19% (23% in patients with measurable centrally confirmed immunohistochemistry [IHC] 3+ and/or fluorescence in situ hybridization [FISH) -positive disease) and clinical benefit rate (complete and partial responses plus stable disease for at least 6 months) was 33% (36% in patients with measurable centrally confirmed IHC 3+ and/or FISH-positive disease). Median time to progression was 3.4 months (range, 0.6 to 23.6 months). The most common treatment-related adverse events were rigors, pyrexia, headache, nausea, and fatigue. Median baseline left ventricular ejection fraction was 63%; this did not significantly change over the course of the study. The average exposure to trastuzumab observed in this study was similar to that in previous studies of the weekly regimen. However, as expected, mean trough trastuzumab concentrations were lower and peak levels were higher with 3-weekly trastuzumab compared with weekly treatments. Conclusion Administering higher doses on a 3-weekly schedule did not compromise the efficacy and safety of trastuzumab in women with HER2-positive MBC, and average exposure was similar to that observed with weekly therapy. Three-weekly trastuzumab may represent a convenient alternative to weekly administration. (c) 2005 by American Society of Clinical Oncology MH - Australia MH - United Kingdom MH - Germany MH - Mexico|Distrito Federal MH - New Zealand MH - Spain PB - ALEXANDRIA: AMER SOC CLINICAL ONCOLOGY RP - NOT IN FILE U3 - TC 49 U4 - Oncology U5 - J;Article AV - English IS - 0732-183X UR - ISI:000228260200008 L2 - METASTATIC BREAST-CANCER; MONOCLONAL-ANTIBODY; HER-2 NEU; CHEMOTHERAPY; HERCEPTIN(R); EXPERIENCE; ONCOGENE; RECEPTOR; THERAPY; TRIALS SO - Journal of Clinical Oncology 2005 ;23(10):2162-2171 13144 UI - 1912 AU - Basilakos S AU - Plionis M AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceINAOE, Puebla 72000, MexicoBasilakos, S, Natl Observ Athens, Inst Astron & Astrophys, I Metaxa & V Pavlou,Palaia Penteli, Athens 15236, Greece TI - Cosmological constraints from X-ray AGN clustering and type Ia supernova data AB - We put constraints on the main cosmological parameters of different spatially flat cosmological models by combining the recent clustering results of XMM-Newton soft (0.5-2 keV) X-ray sources, which have a redshift distribution with median redshift z similar to 1.2, and Type Ia supernova data. Using a likelihood procedure we find that the model that best reproduces the observational data and which is consistent with stellar ages is the concordance cold dark matter model with omega m similar or equal to 0.28, w similar or equal to-1, H-0 72 km s(-1) Mpc(-1) and t(0)similar or equal to 13.5 Gyr, and has an X-ray active galactic nucleus clustering evolution which is constant in physical coordinates. For a different clustering evolution model (constant in comoving coordinates) we find another viable model, although less probable because of the smaller age of the universe, with omega(m)similar or equal to 0.38, w similar or equal to-1.25, H-0 70 km s(-1) Mpc(-1) and t(0)similar or equal to 12.9 Gyr MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000229908100044 L2 - galaxies : clusters : general;cosmology : theory;large-scale structure of Universe;X-rays : general;HUBBLE-SPACE-TELESCOPE; COLD DARK-MATTER; BACKGROUND ANISOTROPIES; ENERGY COMPONENT; GALAXY CLUSTERS; EVOLUTION; BIAS; CONSTANT; UNIVERSE; DENSITY SO - Monthly Notices of the Royal Astronomical Society 2005 ;360(1):L35-L38 13145 UI - 3666 AU - Basilakos S AU - Plionis M AU - Georgakakis A AU - Georgantopoulos I AD - Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, GreeceINAOE, Dept Astrophys, Puebla 72000, MexicoBasilakos, S, Natl Observ Athens, Inst Astron & Astrophys, I Metaxa & V Pavlou, Athens 15236, Greece TI - The XMM-Newton/2dF Survey - VI. Clustering and bias of the soft X-ray point sources AB - We study the clustering properties of X-ray sources detected in the wide area (similar to2 deg(2)) bright, contiguous XMM-Newton/2dF survey. We detect 432 objects to a flux limit of 5 x 10(-15) erg cm(-2) s(-1) in the soft 0.5-2 keV band. Performing the standard angular correlation function analysis, a similar to3sigma correlation signal between 0 and 150 arcsec is detected: w(theta < 150 arcsec) similar or equal to 0.114 +/- 0.037. If the angular correlation function is modelled as a power law, w(theta) = (theta(0)/theta)(gamma-1), then for its nominal slope of gamma= 1.8 we estimate, after correcting for the integral constraint and the amplification bias, that theta(0)similar or equal to 10.4 +/- 1.9 arcsec. Very similar results are obtained for the 462 sources detected in the total 0.5-8 keV band <(theta(0)similar or equal to 10.8 +/- 1.9 arcsec). Using a clustering evolution model which is constant for comoving coordinates (epsilon=-1.2), a luminosity-dependent density evolution (LDDE) model for the X-ray luminosity function and the concordance cosmological model (Omega(m)= 1 -Omega(Lambda)= 0.3) we obtain, by inverting Limber's integral equation, a spatial correlation length of r(0)similar to 16 h(-1) Mpc. This value is larger than that of previous ROSAT surveys as well as of the optical two-degree quasar redshift survey. Only in models where the clustering remains constant for physical coordinates (epsilon=-3), do we obtain an r(0) value (similar to 7.5 h(-1) Mpc) which is consistent with the above surveys. Finally, comparing the measured angular correlation function with the predictions of the concordance cosmological model, we find for two different bias evolution models that the soft X-ray sources at the present time should be biased with respect to the underline matter fluctuation field with bias values in the range (which depends on the biasing model used): 1.9 less than or similar to b(0)less than or similar to 2.7 for epsilon=-1.2 or 1 less than or similar to b(0)less than or similar to 1.6 for epsilon=-3 MH - Greece MH - Mexico|Puebla PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000225749300015 L2 - galaxies : clusters : general;cosmology : theory;large-scale structure of Universe;ANGULAR-CORRELATION FUNCTION; ACTIVE GALACTIC NUCLEI; GALAXY REDSHIFT SURVEY; DARK-MATTER HALOES; DEEP ROSAT SURVEY; SOURCE CATALOG; RADIO-SOURCES; COSMOLOGICAL EVOLUTION; XMM-NEWTON/2DF SURVEY; LUMINOSITY FUNCTION SO - Monthly Notices of the Royal Astronomical Society 2005 ;356(1):183-191 13146 UI - 1992 AU - Basiuk EV AU - Gromovoy TY AU - Datsyuk AM AU - Palyanytsya BB AU - Pokrovskiy VA AU - Basiuk VA AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, MexicoNatl Acad Sci Ukraine, Inst Surface Chem, UA-03164 Kiev, UkraineBasiuk, VA, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico TI - Solvent-free derivatization of pristine multi-walled carbon nanotubes with amines AB - We performed direct solvent-free amination of multi-walled carbon nanotubes (MWCNTs) with nonylamine, dodecylamine, octaclecylamine, 4-phenylbutylamine and 1,8-ocanediamine at a temperature of 150-170 degrees C and reduced pressure. Thermogravimetric analysis and temperature-programmed desorption-mass spectrometry revealed that a major amine fraction decomposes in a temperature interval of 250-500 degrees C, thus existing on multi-walled carbon nanotubes as chemically bonded species; a minor amine fraction was found in physisorbed form. The new derivatization technique combines simplicity in implementation and attractive features of "green" chemistry. It requires no additional chemical activation, but thermal activation instead; it is relatively fast since it can be completed in about 2 h; the high temperature allows one to spontaneously remove excess amine from the nanotube and minimize the possibility of physical adsorption; there is no need to use an (organic) solvent medium. In the case of diamines (represented in this study by 1,8-ocanediamine), the functional groups introduced can be potentially used as chemical linkers for anchoring metal complexes and nanoparticles to multi-walled carbon nanotubes, for adsorption and concentration of trace metal ions MH - Mexico|Distrito Federal MH - Ukraine PB - STEVENSON RANCH: AMER SCIENTIFIC PUBLISHERS RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 1533-4880 UR - ISI:000229752600024 L2 - carbon nanotubes;single-walled;multi-walled;temperature-programmed desorption-mass spectrometry;FUNCTIONALIZATION; FLUORINATION; CHEMISTRY; POLYMERS; C-60 SO - Journal of Nanoscience and Nanotechnology 2005 ;5(6):984-990 13147 UI - 2787 AU - Bassol S AU - Carranza-Lira S AU - Celis-Gonzalez C AU - Santoyo S AU - Murillo A AU - Martinez N AU - Santos J AU - Llaca V AU - de la Loza FR AU - Zarain J AU - da Fonseca AM AU - Camargos AF AU - Baracat EC AU - Da Sa MF AU - Bayo J AU - Adaro L AU - Gurucharri C AU - Murga M AU - Siseles N AU - Sayegh F AU - Tempone A AU - Tempone LM AU - Tozzini RI AU - Boccanera R AU - Naranjo C AU - Sanchez F AU - Gomez G AU - Blanco S AU - Reyes-Marquez R AU - Albrecht G AU - Rios PC AD - Univ Coahuila, Coahuila, MexicoIMSS, Ginecobstet Hosp, Mexico City, DF, MexicoMexico Hosp, Mexico City, DF, MexicoPerinatol Natl Inst, Mexico City, DF, MexicoClimacteric & Osteoporosis Ctr, Puebla, MexicoUniv Sao Paulo, Hosp Clin, Sao Paulo, BrazilUniv Fed Minas Gerais, Belo Horizonte, MG, BrazilRibeirao Preto Univ Sao Paulo, Fac Med, Sao Paulo, BrazilUniv Buenos Aires, Bernardino Rivadavia Hosp, Buenos Aires, DF, ArgentinaUniv Buenos Aires, Jose de San Martin Clin Hosp, Buenos Aires, DF, ArgentinaDr Tempone Gynaecol Ctr, Buenos Aires, DF, ArgentinaUniv Nacl Rosario, Centenario Hosp, Rosario, ArgentinaDel Prado Clin, Medellin, ColombiaUniv Hosp Valle, Cali, ColombiaNatl Inst Forestal Agrocultural & Cattle Invest, Mexico City, DF, MexicoBassol, S, Univ Coahuila, Calle Gregorio A Garcia 198 Sur Torreon, Coahuila, Mexico TI - The impact of a monophasic continuous estro-progestogenic treatment on Latin American menopausal women AB - Objective: The present study was undertaken to assess the impact, effectiveness and safety of a monophasic hormone replacement treatment (HRT) for continuous use with regards to the clinical effects, bleeding patterns and lipid profile of menopausal women in four Latin American countries. Design: Three hundred and six postmenopausal women with natural menopause and uterus present were recruited. This was a multicentre prospective, clinical trial; the participating countries were Brazil (BR), Colombia (CO), Mexico (MX) and Argentina (AR) The study period was 12 months. The HRT regime was formulated in tablets containing 2 mg estradiol E-2 and 1 mg norethisterone acetate (NETA); one visit every 3 months was solicited. Methods: HRT was given as one tablet every day without interruption for 1 year. Climacteric complaints, side-effects, reason for discontinuation, bleeding patterns, lipid profile at baseline and 12 months of treatment were documented. Results: There were no significant differences between the four populations on clinical measurements. Thirty-four women discontinued, 13 for bleeding problems. The five most common side-effects were mastalgia, bleeding problems, headache, pelvic pain and nausea. 44.8% of women experienced scanty vaginal bleeding during the first 3 months of therapy. Ninety seven percent of women had amenorrhea at the end of the study in MX, BR and AR, and 100% in CO. Body weight was constant during the study, and no correlation was found between body weight and total days with bleeding. The Kupperman index score was used to evaluate the climacteric complaints, and the score decreased from a mean of 25.4 to 5.1 at 12-months visit. Total cholesterol levels were significantly reduced in BR and CO (P < 0.05) between baseline and the final sample; serum triglycerides remained unchanged, HDL-cholesterol was significantly increased in MX (P < 0.05), and LDL-cholesterol was significantly reduced in CO (P < 0.05). The results of this 1-year study emphasize that a continuous combined HRT regimen with 2 mg E2/1 mg NETA is an attractive alternative for postmenopausal women who are at least 1 year after their menopause and optimally 2 years after their menopause. Although the combination of 2 mg E2 with 1 mg NETA in a Continuous combined therapy scheme has been in use in the Nordic countries for over a decade and in Latin America for the last 6 years, there have been no previous published reports on its effectivity in Latin American women. This publication reports the experience in a group of 306 Latin American women, and it is the first Latin American publication with this formulation. (c) 2004 Published by Elsevier Ireland Ltd MH - Argentina MH - Brazil MH - Colombia MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - Mexico|Puebla PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 0 U4 - Geriatrics & Gerontology;Obstetrics & Gynecology U5 - J;Article AV - English IS - 0378-5122 UR - ISI:000227663700006 L2 - hormone replacement treatment;estradiol;Norethisterone acetate;Kupperman index;HORMONE REPLACEMENT THERAPY; CLIMACTERIC COMPLAINTS; POSTMENOPAUSAL WOMEN; BLEEDING PATTERNS; LIPOPROTEINS; COMBINATIONS; CHOLESTEROL; METABOLISM; PROGESTIN; REGIMEN SO - Maturitas 2005 ;50(3):189-195 13148 UI - 2485 AU - Batchelor TP AU - Hardy ICW AU - Barrera JF AU - Perez-Lachaud G AD - Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, Leics, EnglandColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoHardy, ICW, Univ Nottingham, Sch Biosci, Sutton Bonington Campus, Loughborough LE12 5RD, Leics, England TI - Insect gladiators II: Competitive interactions within and between bethylid parasitoid species of the coffee berry borer, Hypothenemus hampei (Coleoptera : Scolytidae) AB - The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) causes substantial reductions in coffee production. It originates from Africa but is now present in almost all of the major coffee producing countries. Classical biological control attempts around the world, including South and Central America, the Caribbean, Indian sub-continent, Indonesia, and Polynesia, including introductions of the African bethylid wasps Prorops nasuta Waterston and Cephalonomia stephanoderis Betrem, have not yet proved sufficiently successful. In Mexico, a bethylid wasp indigenous to North America and Europe, Cephalonomia hyalinipennis Ashmead, has naturally started to attack the borer. The presence of multiple species of natural enemies has the potential to disrupt biological control via negative interspecific interactions. We evaluate both inter- and intraspecific competition among these three bethylids in the laboratory, focussing on pairs of adult females competing directly for hosts. In interspecific contests, the loser is frequently killed. C. stephanoderis is the most successful species, while P. nasuta females never killed their opponents. Intraspecific interactions often involved fighting behavior but were non-fatal. We discuss the implications of the differing strengths of such inter- and intraspecific interactions for the coexistence of these natural enemies of the coffee berry borer and for biological control. (c) 2005 Elsevier Inc. All rights reserved MH - United Kingdom MH - Mexico|Chiapas PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Biotechnology & Applied Microbiology;Entomology U5 - J;Article AV - English IS - 1049-9644 UR - ISI:000228697300008 L2 - Bethylidae;biological control;Cephalonomia hyalinipennis;Cephalonomia stephanoderis;coffee berry borer;fatal fighting;Hypothenemus hampei;inter- and intraspecific competition;Prorops nasuta;CEPHALONOMIA-STEPHANODERIS HYMENOPTERA; PROROPS-NASUTA HYMENOPTERA; BETREM HYMENOPTERA; RESOURCE VALUE; PATCH DEFENSE; CLUTCH SIZE; WASP; CONTESTS; BIOLOGY; MEXICO SO - Biological Control 2005 ;33(2):194-202 13149 UI - 1147 AU - Batina N AU - Reyna-Cordova A AU - Trinidad-Reyes Y AU - Quintana-Garcia M AU - Buenrostro-Gonzalez E AU - Lira-Galeana C AU - Andersen SI AD - Tech Univ Denmark, Dept Chem Engn, IVC, SEP, DK-2800 Lyngby, DenmarkInst Mexicano Petr, Thermodynam Res Lab, Mexico City 07730, DF, MexicoNatl Autonomous Univ Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Lab Nanotecnol & Ingn Mol, Area Electroquim, Mexico City 09340, DF, MexicoAndersen, SI, Tech Univ Denmark, Dept Chem Engn, IVC, SEP, Bldg 229, DK-2800 Lyngby, Denmark TI - Qualitative analysis of thin films of crude oil deposits on the metallic substrate by Fourier transform infrared (FTIR) microscopy AB - Thin films of crude oil samples were prepared for atomic force microscopy (AFM) analysis on the gold substrate. Sample preparation involved evaporation during a long (24 h) but mild thermal exposure (80 degrees C). Fourier transform infrared (FTIR) microscopy (reflectance spectroscopy) was employed to determinate the quality of the thin film surface, before the morphology characterization. The surface reflectance spectra were compared to direct transmittance FTIR of liquid oil samples. The two FTIR techniques showed different spectral characteristics related to oxygenated functionalities. This clearly indicated that the surface of the thin films of the oil samples prepared for AFM is oxidized. Oil samples of different origin show different degrees of oxidation seen by the development of carboxylic acid vibrations at 1750 cm(-1) as well as vibrations in the 13001100 cm-1 region. The relative degree of oxidation state was compared to surface morphology data by AFM previously reported. The reported results emphasize the advantage of complementary techniques (AFM/FTIR microscopy) in the analysis of petroleum thin films that should be considered during analysis and interpretation of this type of data MH - Denmark MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Energy & Fuels;Engineering, Chemical U5 - J;Article AV - English IS - 0887-0624 UR - ISI:000232067300031 L2 - PETROLEUM ASPHALTENES; RESINS; AFM SO - Energy & Fuels 2005 ;19(5):2001-2005 13150 UI - 1331 AU - Battiston GA AU - Berto D AU - Convertino A AU - Emiliani D AU - Figueras A AU - Gerbasi R AU - Viticoli S AD - CNR, Ist Chim Inorgan & Superfici, I-35127 Padua, ItalyCNR, Ist Studio Mat Nanostrutturati, I-00016 Monterotondo, St Roma, ItalyUNAM, Ctr Fis Aplicada & Tecnol Avanzada, Santiago De Queretaro 76000, QRO, MexicoCSIC, ICMAB, Bellaterra 08193, SpainBattiston, GA, CNR, Ist Chim Inorgan & Superfici, Corso Stati Uniti 4, I-35127 Padua, Italy TI - PECVD of h-BN and c-BN films from boranedimethylamine as a single source precursor AB - Boron nitride (BN) thin films have been successfully synthesised via low pressure plasma enhanced chemical vapour deposition (PECVD) by using boranedimethylamine, BH3NH(CH3)(2), as a single source precursor in the temperature range 280-550 degrees C in a nitrogen-argon atmosphere. The plasma power was optimised with the aim of obtaining suitable cubic/hexagonal phase ratios. The annealing of the h-BN films at temperatures up to 1000 degrees C in a nitrogen atmosphere, at normal pressure, gave rise to a complete transformation into the cubic phase. FTIR measurements provided a suitable method for identifying the structure of BN films. UV-vis spectroscopy was carried out in order to investigate the optical behaviour of the films. (C) 2005 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Queretaro MH - Spain PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Electrochemistry U5 - J;Article AV - English IS - 0013-4686 UR - ISI:000231461300012 L2 - PECVD;h-BN;c-BN;boranedimethylamine;single source;NITRIDE THIN-FILMS; CHEMICAL-VAPOR-DEPOSITION; BORON-NITRIDE; MICROWAVE PLASMA; GROWTH SO - Electrochimica Acta 2005 ;50(23):4600-4604 13151 UI - 2057 AU - Batyrshin I AU - Sheremetov L AU - Markov M AU - Panova A AD - Inst Mexicano Petr, Eje Cent Lazaro Cardenas, Mexico City 07730, DF, MexicoKazan VI Lenin State Univ, Kazan 420008, RussiaSheremetov, L, Inst Mexicano Petr, Eje Cent Lazaro Cardenas, 152 Col San Bartolo Atepehuacan, Mexico City 07730, DF, Mexico TI - Hybrid method for porosity classification in carbonate formations AB - Recently the methods of intelligent computing (IC) have been applied for the interpretation of well log data. This is due to the necessity to process well logs in the situations when complete information about them cannot be obtained. In this case, hybrid methods based on statistical analysis, fuzzy logic and evolutionary algorithms could be very useful. This paper presents such hybrid analysis of logging data of the wells from the Cantarell Oil Complex, in the Zonda of Campeche, Mexico. Different methods, such as principal component analysis, factor analysis, fuzzy classification and evolutionary optimization are used for analysis of the structure of porosity space given by primary, cavernous and micro-fractures porosity classes. Comparison and analysis of the obtained results show that IC methods can substantially compensate for the absence of exact information without losing the precision of data analysis and at the same time decrease the costs of well logging. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Russia PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Petroleum;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0920-4105 UR - ISI:000229694900005 L2 - petrophysics;intelligent computing;intelligent well log analysis;fuzzy clustering;secondary porosity;NEURAL-NETWORK; FUZZY-LOGIC; FIELD SO - Journal of Petroleum Science and Engineering 2005 ;47(1-2):35-50 13152 UI - 482 AU - Baumgardner D AU - Raga GB AU - Brasseur G AD - Univ Nacl Autonoma Mexico, Mexico City 04150, DF, MexicoMax Planck Inst Meteorol, D-20146 Hamburg, GermanyBaumgardner, D, Univ Nacl Autonoma Mexico, Mexico City 04150, DF, Mexico TI - New Directions: Are we prepared for a wet MIRAGE? MH - Germany MH - Mexico|Distrito Federal PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Environmental Sciences;Meteorology & Atmospheric Sciences U5 - J;Editorial Material AV - English IS - 1352-2310 UR - ISI:000233671700022 SO - Atmospheric Environment 2005 ;39(38):7447-7448 13153 UI - 628 AU - Baumgardner D AU - Raga GB AU - Jimenez JC AU - Bower K AD - Univ Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv Manchester, Atmospher Sci Grp, Manchester M60 1QD, Lancs, EnglandBaumgardner, D, Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico TI - Aerosol particles in the Mexican East Pacific - Part I: processing and vertical redistribution by clouds AB - Airborne measurements of aerosol particle size distributions were made in the Mexican Intertropical Convergence Zone. The volume concentrations of submicron and super micron particles at cloud base were compared with those in near-cloud regions over a range of altitudes. Of 78 near-cloud regions analyzed, 68% and 45% had enhanced volumes of submicron particles and supermicron particles, respectively. In addition, 35% of these regions had supermicron particles removed, presumably by precipitation. In 61% of the cases the enhancement in volume occurred over the size range from 0.1 to 50 mu m whereas only submicron volumes were enhanced in 35% of the cases. In regions near clouds that were formed in air of maritime origin the frequency of volume enhancement decreased with increasing altitude and was twice as frequent on the dissipating side of clouds compared to the growing side. No such differences were found in the regions near clouds formed in air originating from the land. The frequency and average magnitude of volume enhancement are in qualitative and quantitative agreement with previous observational and theoretical studies that relate enhancements in particle mass to the uptake by cloud droplets of SO2 accompanied by additional growth by droplet coalescence MH - United Kingdom MH - Mexico|Distrito Federal PB - KATLENBURG-LINDAU: EUROPEAN GEOSCIENCES UNION RP - NOT IN FILE U3 - TC 1 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 1680-7324 UR - ISI:000233317800002 L2 - ATMOSPHERIC POLLUTANTS; WET REMOVAL; RADIATIVE PROPERTIES; (NH4)2SO4 PARTICLES; CUMULUS CLOUDS; CHEMISTRY; FSSP-300; DROPS; PROBE SO - Atmospheric Chemistry and Physics 2005 ;5():3081-3091 13154 UI - 3313 AU - Baumgardner D AU - Chepfer H AU - Raga GB AU - Kok GL AD - Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04150, DF, MexicoInst Pierre Simon Laplace, Meteorol Dynam Lab, F-91128 Palaiseau, FranceDroplet Measurement Technol, Boulder, CO 80301, USABaumgardner, D, Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04150, DF, Mexico TI - The shapes of very small cirrus particles derived from in situ measurements AB - [ 1] The shapes of ice crystals have been derived from measurements in cirrus during the CRYSTAL/ FACE experiment in July, 2002. The measurements were made in the size range from 5 - 45 mum with an optical particle spectrometer that measures forward ( 4 - 12degrees) and backscattered ( 168 - 176 degrees) light from individual particles. The phase functions for ensembles of ideal crystal shapes were integrated over these collection angles to compare with the measured ratios of forward to backward scattered light from nine research flights. Approximately 90% of the crystals agreed with the theoretical model for a mixture of bullet rosettes, plates and hollow columns. Approximately 10% of the crystals were characterized as ice spheres. There was no significant dependency of shape on wind direction, temperature or relative humidity with respect to ice MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 5 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0094-8276 UR - ISI:000226510800002 L2 - SINGLE-SCATTERING PROPERTIES; SMALL ICE CRYSTALS; OPTICAL-PROPERTIES; CLOUDS; PARAMETERIZATION; SIZE; SENSITIVITY; HABITS; DESIGN SO - Geophysical Research Letters 2005 ;32(1): 13155 UI - 509 AU - Bautista C AU - Larrea F AU - Nathanielsz P AU - Zambrano E AD - Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, MexicoUniv Texas, Hlth Sci Ctr, Ctr Pregnancy & Newborn Res, San Antonio, TX 78285, USA TI - A low protein maternal diet during pregnancy and lactation has sex and window of exposure specific effects on offspring serum leptin and growth in the rat MH - Mexico|Distrito Federal MH - USA PB - BALTIMORE: INT PEDIATRIC RESEARCH FOUNDATION, INC RP - NOT IN FILE U3 - TC 0 U4 - Pediatrics U5 - J;Meeting Abstract AV - English IS - 0031-3998 UR - ISI:000232779000375 SO - Pediatric Research 2005 ;58(5):1102-1102 13156 UI - 2676 AU - Bautista CJ AU - Guillen L AU - Ledesma H AU - Mendez I AU - Nathanielsz PW AU - Zambrano E AD - Inst Nacl Ciencias Med Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, MexicoUniv Texas, Hlth Sci Ctr, San Antonio, TX, USA TI - Effects of maternal isocaloric diet during pregnancy (P) and/or lactation (L) on milk composition and pup food intake at postnatal days (PND) 13-14 MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 0 U4 - Obstetrics & Gynecology U5 - J;Meeting Abstract AV - English IS - 1071-5576 UR - ISI:000227329101422 SO - Journal of the Society for Gynecologic Investigation 2005 ;12(2):365A-365A 13157 UI - 300 AU - Bautista F AU - az-Garrido S AU - Castillo-Gonzalez M AU - Zinck JA AD - Univ Autonoma Yucatan, Dept Ecol, FMVZ, Merida, Yucatan, MexicoInt Inst Geoinformat Sci & Earth Observat, Enschede, NetherlandsUniv Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 04510, DF, MexicoBautista, F, Univ Autonoma Yucatan, Dept Ecol, FMVZ, Km 15-5 Carretera Merida Xmatkuil, Merida, Yucatan, Mexico TI - Spatial heterogeneity of the soil cover in the Yucatan karst: Comparison of Mayan, WRB, and numerical classifications AB - In karstic areas, geopedologic information integrating soil and relief features, especially concerning short-distance variability, is usually scarce. The aim of this paper was to compare soil classes in the Yucatan karst using the Mayan soil nomenclature, the World Reference Base for Soil Resources (WRB), numerical soil classification (NSC), and geostatistics. The landscape is a flat-to-slightly-undulating karstic plain. Soil properties were determined at 54 sampling points on a regular grid covering an area of 1350 m(2). Six indigenous soil classes were identified on the basis of the terrain position, topsoil color, stoniness, rockiness. rock type. and soil depth. Five WRB soil units were recognized belonging mainly to Leptosols. Furthermore, six NSC groups were determined mainly on the basis of organic matter and stoniness. Soil organic material and texture explained 57% of the variation of the soil cover. An isotropic model of organic carbon shows a range of 39 m MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Netherlands PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Soil Science U5 - J;Article AV - English IS - 1064-2293 UR - ISI:000234137300014 SO - Eurasian Soil Science 2005 ;38():S81-S88 13158 UI - 2427 AU - Bautista JL AU - Tiburcio J AU - Torrens H AD - UNAM, Fac Quim, Div Estudios Posgrado, Mexico City 04510, DF, MexicoUniv Windsor, Dept Chem & Biochem, Windsor, ON N9B 3P4, CanadaTorrens, H, UNAM, Fac Quim, Div Estudios Posgrado, Cd Univ, Mexico City 04510, DF, Mexico TI - Synthesis of the new 5-(fluorobenzenethiolated)-2-furfuraldehyde thiosemicarbazones AB - Four new fluorinated aldehydes (5-RfS-2-furfuraldehyde; R-f = 4-CF3C6F4 for 1, 4-C6HF4 for 2, 4-CF3C6H4 for 3 and 2,4-C6H3F2 for 4) derived from 5-bromo-2-furfuraldehyde have been prepared. Treatment of compounds 1-4 with thiosemicarbazide afford the corresponding 5-RfS-2-furfuraldehyde thiosemicarbazones (Rf = 4-CF3C6F4 for 5, 4-C6H3F4 for 6, 4-CF3C6H4 for 7 and 2,4-C6H3F2 for 8). The molecular structure of compound 6 has been determined MH - Canada MH - Mexico|Distrito Federal PB - STUTTGART: GEORG THIEME VERLAG KG RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 0039-7881 UR - ISI:000228616300004 L2 - fluorine;furans;sulfur;thiosemicarbazones;furfuraldehyde;NONLINEAR-OPTICAL PROPERTIES; NICKEL(II) COMPLEXES; BIOLOGICAL-ACTIVITY; SUPRAMOLECULAR STRUCTURE; CRYSTAL-STRUCTURE; METAL-COMPLEXES; DERIVATIVES; COORDINATION; CHEMISTRY; POTENT SO - Synthesis-Stuttgart 2005 ;(6):899-902 13159 UI - 2397 AU - Bautista R AU - Salorio MJS AU - Zuazua R AD - UNAM, Inst Matemat, Morelia, Michoacan, MexicoUniv Coruna, Fac Informat, Coruna, SpainBautista, R, UNAM, Inst Matemat, Unidad Morelia,AP 61-3,CP 58089, Morelia, Michoacan, Mexico TI - Almost split sequences for complexes of fixed size AB - Let A be an additive k-category, k a commutative artinian ring and n > 1. We denote by C-n (A) the category of complexes X = (X-i, d(X)(i)) i is an element of Z in A with X-i = 0 if i is not an element of {1,...,n}. We see that Cn(A) is endowed with a natural exact structure and its global dimension is at most n-1. In case A is a dualizing category, we prove that Cn(A) has almost split sequences in the sense of [P. Drdxler, I. Reiten, S.O. Smal phi, O. Solberg, Exact categories and vector space categories, with an appendix by B. Keller, Trans. Amer. Math. Soc. 351 (2) (1999) 647-682] or [R. Bautista, The category of morphisms between projective modules, Comm. Algebra 32 (11) (2004) 4303-4331]. If A is the category of finitely generated projective Lambda-modules (Lambda an Artin algebra), we prove that the ends of an almost split sequence are related by an Auslander-Reiten translation functor which is defined in the most general category C-n (Proj Lambda). (c) 2005 Elsevier Inc. All rights reserved MH - Mexico|Michoacan MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0021-8693 UR - ISI:000228441100008 L2 - STABLE EQUIVALENCE; CATEGORIES; ALGEBRAS; MODULES SO - Journal of Algebra 2005 ;287(1):140-168 13160 UI - 944 AU - Bazyma LA AU - Rashkovan VM AD - Natl Aerosp Univ, Kharkov Aviat Inst, Dept 402, UA-61070 Kharkov, UkraineNatl Polytech Inst, Mexico City 04430, DF, MexicoBazyma, LA, Natl Aerosp Univ, Kharkov Aviat Inst, Dept 402, 17 Chkalov St, UA-61070 Kharkov, Ukraine TI - Stabilization of blunt nose cavity flows by using energy deposition AB - A computational investigation of the deposited energy per unit mass influence on the supersonic flow stabilization and the change of aerodynamic drag of the hemisphere with cylindrical cavity is presented. The results obtained suggest that pulsed sources of thermal flux would be an effective means of influencing the pulsating process during flow around cavity bodies MH - Mexico|Distrito Federal MH - Ukraine PB - RESTON: AMER INST AERONAUT ASTRONAUT RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Aerospace U5 - J;Article AV - English IS - 0022-4650 UR - ISI:000232523400003 SO - Journal of Spacecraft and Rockets 2005 ;42(5):790-794 13161 UI - 2792 AU - Bazyma LA AU - Rashkovan VM AD - Natl Aerosp Univ, Kharkov Aviation Inst, Dept Aeronaut, UA-61070 Kharkov, UkraineNatl Polytech Inst, Mexico City, DF, MexicoBazyma, LA, Natl Aerosp Univ, Kharkov Aviation Inst, Dept Aeronaut, 17 Chkalov St, UA-61070 Kharkov, Ukraine TI - Numerical simulation of a plasma plume exhaust from an electrothermal plasma thruster MH - Mexico|Distrito Federal MH - Ukraine PB - RESTON: AMER INST AERONAUT ASTRONAUT RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Aerospace U5 - J;Article AV - English IS - 0748-4658 UR - ISI:000227668400020 L2 - PERFORMANCE; PROPULSION; ARCJET SO - Journal of Propulsion and Power 2005 ;21(2):378-382 13162 UI - 747 AU - Bazzino G AU - Quinones RA AU - Norbis W AD - DINARA, Montevideo 1497, UruguayConcepcion Univ, Ctr Invest Oceanog Pacifico SurOriental, Concepcion, ChileConcepcion Univ, Dept Oceanog, Concepcion, ChileBazzino, G, CIBNOR, Programa Doctorado Ecol Pesquera, Mar Bermejo 195,Colonia Playa Palo Santa Rita, La Paz 23090, Baja California, Mexico TI - Environmental associations of shortfin squid Illex argentinus (Cephalopoda : Ommastrephidae) in the Northern Patagonian Shelf AB - We identified environmental associations (depth, bottom temperature and bottom salinity) of the shortfin squid Illex argentinus in the Northern Patagonian Shelf. Data are from 15 research bottom trawl surveys conducted in the Argentine-Uruguayan Common Fishing Zone (AUCFZ) between 1985 and 1998. Squid distribution in the surveyed area showed significant associations (p < 0.05) mostly with depth and bottom temperature. Bathymetric associations of squid detected in March-April, May-June and July-August cruises revealed a preference of squid for deep depths (80-280 m, intermediate and external shelf) and cool bottom temperatures (4-10 degrees C, subantarctic water) within the survey area. In contrast, the results observed during November-December cruises showed a preference of squid for shallower depths (70-90 m) and warmer bottom temperatures. The majority of two-way environmental analyses showed significant associations, suggesting the existence of a strong correlation between the environmental factors used in our analyses. The identification of significant associations between squid distribution and bottom temperature seem to be related to the presence of strong thermal gradients within the study area. This could be supporting the existence of an association between L argentinus with the Brazil-Malvinas confluence front and also with the shelf break front. (c) 2005 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|Baja California MH - Uruguay PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000233001000009 L2 - shortfin squid;Illex argentinus;environmental associations;Northern Patagonian Shelf;SOUTH-ATLANTIC; MESOSCALE OCEANOGRAPHY; NORTHWEST ATLANTIC; RECRUITMENT; CURRENTS; FISHERY; BRAZIL; OCEAN; ILLECEBROSUS; VARIABILITY SO - Fisheries Research 2005 ;76(3):401-416 13163 UI - 2131 AU - bdala-Roberts L AU - Parra-Tabla V AD - Univ Autonoma Yucatan, Dept Ecol, Merida 9700, Yucatan, MexicoAbdala-Roberts, L, CSIC, Estac Biol Donana, Avda Maria Luisa S-N,Pabellon Peru, Seville 41013, Spain TI - Artificial defoliation induces trichome production in the tropical shrub Cnidoscolus aconitifolius (Euphorbiaceae) AB - Induction of plant defenses and their spatial variability are key subjects in the field of ecology and evolution of defensive traits in plants. Nevertheless, induction has been more commonly studied under controlled environments, ignoring other factors that might influence this process in natural settings. The main goal of this study was to determine if artificial defoliation induces trichome production in three natural populations of the tropical shrub Cnidoscolus aconitifolius. First, we performed trichome counts for each population before imposing artificial defoliation to assess differences in trichome loads between populations. Trichome densities (trichomes/cm(2)) were quantified for leaf blades, petioles, and flower sulks. To determine if defoliation induced trichome production, three defoliation treatments (0% leaves defoliated or controls, 50% of total leaves defoliated, and 100% defoliation) were applied once at the beginning of the reproductive season. Trichome counts were performed on each structure every similar to 20 d during a 3-mo period after the application of treatments. Trichome counts showed significant differences in trichome densities between populations for all three structures. In turn, artificial defoliation increased trichome density. Significant differences among treatments were found for trichome densities on leaf blades and petioles. In both these structures, the 100 percent defoliation treatment differed significantly from control plants, presenting higher trichome densities. In addition, the treatment x population interaction was not significant for leaf blades and petioles, indicating that induction is a generalized response in this species, at least at the study sites. These results indicate that trichomes in C. aconitifolius are inducible due to defoliation MH - Mexico|Yucatan MH - Spain PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 4 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000229355500013 L2 - Cnidoscolus aconitifolius;defoliation;herbivory;induction;Mexico;spatial variation;trichomes;BRASSICA-RAPA; PLANT DEFENSE; URTICA-DIOICA; HERBIVORY; POPULATIONS; RESISTANCE; RESPONSES; EVOLUTION; ECOLOGY; GROWTH SO - Biotropica 2005 ;37(2):251-257 13164 UI - 3295 AU - Beaney P AU - Lizardi-Mendoza J AU - Healy M AD - Queens Univ Belfast, Sch Chem Engn, Belfast BT9 5AG, Antrim, North IrelandDTAOA, Ctr Invest Alimentac & Desarrollo, Hermosillo 83000, Sonora, MexicoHealy, M, Queens Univ Belfast, Sch Chem Engn, David Keir Bldg,Stranmillis Rd, Belfast BT9 5AG, Antrim, North Ireland TI - Comparison of chitins produced by chemical and bioprocessing methods AB - Lactic acid fermentation was used to extract chitin from prawn shell (Nephrops norvegicus) at two different scales of operation. The fermentation products were characterized and compared with chitin extracted from the same source by a chemical method. Chitosans produced from the obtained chitins were evaluated in terms of their intrinsic viscosity, molecular weight and degree of acetylation (DA). The fermentation removed 690 g kg(-1) and 770 g kg(-1) of inorganic matter, 490 and 440 g kg(-1) of protein and 540 and 770g kg(-1) of lipids from the shells at laboratory and pilot plant scales, respectively. However, the functional properties such as the DA of the chitin, the molecular weight and the DA of the chitosans were similar to those obtained for the chemically-obtained chitin and its chitosan. Despite the incomplete extraction of chitin this biological process could be useful to produce chitin and chitosan in a more environment-friendly approach. (C) 2004 Society of Chemical Industry MH - Mexico|Sonora MH - United Kingdom PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Chemistry, Multidisciplinary;Engineering, Chemical U5 - J;Article AV - English IS - 0268-2575 UR - ISI:000226590000005 L2 - prawn shell;Nephrops;chitin;lactic acid fermentation;chitosan;LACTIC-ACID FERMENTATION; SHRIMP SHELLS; CHITOSAN; WASTE; RECOVERY; PRESERVATION; HYDROLYSATE; EXTRACTION; PROTEASE; LIQUID SO - Journal of Chemical Technology and Biotechnology 2005 ;80(2):145-150 13165 UI - 410 AU - Becchi M AU - Avendano C AU - Strigazzi A AU - Barbero G AD - Politecn Turin, Dipartimento Fis, I-10129 Turin, ItalyINFM, I-10129 Turin, ItalyUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoStrigazzi, A, Politecn Turin, Dipartimento Fis, Corso Duca Abruzzi 24, I-10129 Turin, Italy TI - Impedance spectroscopy of water solutions: The role of ions at the liquid-electrode interface AB - We discuss the influence of the ions dissolved in a liquid on the impedance spectroscopy of a cell. Our analysis is performed in the small-voltage regime, where the actual bulk density of ions is only slightly perturbed by the external electric field. In this framework, we show that the presence of the ions can be taken into account by a surface density of charge. The agreement between the theoretical prediction, on the basis of the assumption that the ionic mobility is frequency independent, and the experimental data for the real and imaginary parts of the impedance is fairly good for frequencies larger than 100 Hz. In the low-frequency range, the agreement of the theory with the experiment is rather poor. In this region, the experimental data can be successfully fitted by introducing the impedance of the metal -electrolyte interface, which is accurately represented by Z(i) = w(i omega)(-nu), where w and v are two constants, with 0 < nu < 1. From the analysis of the experimental data, we determine w and v. The theoretical predictions of our model are in good agreement with the experimental data in the investigated frequency range MH - Italy MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000233864300051 L2 - FREQUENCY-DEPENDENT POLARIZATION; RANGE DIELECTRIC SPECTROMETER; GENERAL PLANAR ELECTRODES; COLLOIDAL SUSPENSIONS; ARBITRARY MAGNITUDE; ZETA POTENTIALS; CELL DESIGN; CALIBRATION; VALIDATION SO - Journal of Physical Chemistry B 2005 ;109(49):23444-23449 13166 UI - 112 AU - Becerra-Guzman F AU - Guzman-Novoa E AU - Correa-Benitez A AU - Zozaya-Rubio A AD - Univ Guadalajara, Ctr Univ Costa Sur, Autlan de Navarro 48900, Jalisco, MexicoUniv Guelph, Dept Environm Biol, Guelph, ON N1G 2W1, CanadaUNAM, Fac Med Vet & Zootecn, Dept Esp Tradicionales, Mexico City 04510, DF, MexicoGuzman-Novoa, E, Univ Guadalajara, Ctr Univ Costa Sur, Autlan de Navarro 48900, Jalisco, Mexico TI - Length of life, age at first foraging and foraging life of Africanized and European honey bee (Apis mellifera) workers, during conditions of resource abundance AB - This study was conducted to analyse the length of life, the age at which bees began to forage, and the foraging life of European and Africanized worker honey bees (Apis mellifera) during conditions of resource abundance. Newly emerged worker bees were identified with coloured paint or numbered plastic tags on their thorax, and were co-fostered in common colonies of European, Africanized or unrelated bee origin to infer if the variation found was due to genetic or environmental effects. Both European and Africanized bees varied significantly in their length of life, within a range of 19.9 to 25.9 days, but there was no clear and consistent difference for this trait between the two types of bees. Hive and colony environment influenced the length of life of both bee types. Bees lived longer in colonies with Africanized environment. These results suggest that genetic effects influence the length of life of workers bees to a lesser degree than do environmental effects. The age at which bees began foraging affected both the length of life and the foraging life of the experimental workers. Bees that started to forage late in life lived longer than those that started early. Additionally, bees that initiated foraging activities at a younger age had a longer foraging life. The strongest correlation was between length of life and foraging life (p = 0.66), indicating that bees that lived longer also had a longer foraging life. Bees with the longest foraging lives were those that began to forage early in life and that also lived as long or longer than average bees. European bees had longer foraging lives than Africanized bees. The implications of these results on the life-history strategies of Africanized and European bees are discussed MH - Canada MH - Mexico|Distrito Federal MH - Mexico|Jalisco PB - CARDIFF: INT BEE RESEARCH ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0021-8839 UR - ISI:000235434100004 L2 - Apis mellifera;lifespan;foraging life;Africanized honey bees;DIVISION-OF-LABOR; SOCIAL INSECTS; HYMENOPTERA; APIDAE; LONGEVITY; RACES; PERFORMANCE; COMPONENTS; SENESCENCE; SPAN SO - Journal of Apicultural Research 2005 ;44(4):151-156 13167 UI - 2224 AU - Becerril R AU - Herrera-Aguilar A AD - Univ Michoacana de San Nicolas de Hidalgo, Inst Fis & Matemat, Morelia 58040, Michoacan, MexicoAristotle Univ Thessaloniki, Dept Theoret Phys, Thessaloniki 54124, GreeceBecerril, R, Univ Michoacana de San Nicolas de Hidalgo, Inst Fis & Matemat, Edificio C-3,Ciudad Univ, Morelia 58040, Michoacan, Mexico TI - Charging a double Kerr solution in five-dimensional Einstein-Maxwell-Kalb-Ramond theory AB - We consider the low-energy effective action of the five-dimensional (5D) Einstein-Maxwell-Kalb-Ramond theory. After compactifying this truncated model on a two-torus and switching off the U(1) vector fields of this theory, we recall a formulation of the resulting three-dimensional action as a double Ernst system coupled to gravity. Further, by applying the so-called normalized Harrison transformation on a generic solution of this double Ernst system we recover the U(1) vector field sector of the theory. Afterward, we compute the field content of the generated charged configuration for the special case when the starting Ernst potentials correspond to a pair of interacting Kerr black holes, obtaining in this way an exact field configuration of the 5D Einstein-Maxwell-Kalb-Ramond theory endowed with effective Coulomb and dipole terms with momenta. Some physical properties of this object are analyzed as well as the effect of the normalized Harrison transformation on the double Kerr seed solution. (C) 2005 American Institute of Physics MH - Greece MH - Mexico|Michoacan PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0022-2488 UR - ISI:000229155700022 L2 - ROTATING BLACK-HOLES; HETEROTIC STRING THEORY; FIELD-EQUATIONS; DEFORMED MASS; DILATON-AXION; 3 DIMENSIONS; EQUILIBRIUM; SYMMETRIES; BRANES SO - Journal of Mathematical Physics 2005 ;46(5): 13168 UI - 2166 AU - Beckman TG AU - Alcazar JR AU - Sherman WB AU - Werner DJ AD - USDA ARS, SE Fruit & Tree Nut Res Lab, Byron, GA 31008, USAColegio Postgrad, Programe Fruticultura, Montecillo 56230, MexicoUniv Florida, Dept Hort Sci, Gainesville, FL 32611, USAN Carolina State Univ, Dept Hort Sci, Raleigh, NC 27695, USABeckman, TG, USDA ARS, SE Fruit & Tree Nut Res Lab, Byron, GA 31008, USA TI - Evidence for qualitative suppression of red skin color in peach AB - Recently observed hybrid populations of peach [Prunus persica (L.) Batsch] provide evidence for the presence of a single gene suppressing red skin color. The fruit of seedling populations of FL90-48C and FL90-37C x FL84-18C, FL90-50CN x FL92-2C, FL90-48C x FL91-12, FL91-8 x FL88-6, and open-pollinated or selfed populations from unselected seedlings of 'Contender' x P165977 ('Giallo di Padova') and 'Mexico Selection' x 'Oro A' were rated for normal quantitative vs. no anthocyanin skin color at maturity. At this stage of development, anthocyaninless phenotypes displayed no red color over the entire surface of the fruit. Instead they were characterized by a bright yellow ground color that stood out visually in the seedling rows, and which was dubbed highlighter. The two crosses with FL84-18C yielded populations that approximated a 1:1 segregation ratio for quantitative red:no red skin color. All other crosses produced populations that closely approximated a 3:1 segregation ratio for quantitative red to no red. These data are consistent with the hypothesis that the highlighter phenotype is a single gene recessive trait. We propose the gene symbols of h and H for the recessive no red (highlighter) and dominant normal quantitative red (wild-type) alleles, respectively MH - Mexico|Estado De Mexico MH - USA PB - ALEXANDRIA: AMER SOC HORTICULTURAL SCIENCE RP - NOT IN FILE U3 - TC 0 U4 - Horticulture U5 - J;Article AV - English IS - 0018-5345 UR - ISI:000229399200004 SO - Hortscience 2005 ;40(3):523-524 13169 UI - 733 AU - Begovich O AU - Ruiz VM AU - Georges D AU - Besancon G AD - CINVESTAV, Gdl, Guadalajara 45090, Jalisco, MexicoInst Mexicano Tecnol Agua, Jiutepec 62550, Morelos, MexicoENSIEG, Lab Automat Grenoble, F-38402 St Martin Dheres, FranceBegovich, O, CINVESTAV, Gdl, Lopez Mateos Sur 590, Guadalajara 45090, Jalisco, Mexico TI - Real-time application of a fuzzy gain scheduling control scheme to a multi-pool open irrigation canal prototype AB - This paper is devoted to the practical real-time application of anew fuzzy gain scheduling control scheme to a multi-pool open irrigation canal prototype. This control scheme successfully regulates the downstream level of three pools of the prototype canal in response to the inflow rate variations. The scheme combines functional fuzzy logic with gain scheduling MH - France MH - Mexico|Jalisco MH - Mexico|Morelos PB - AMSTERDAM: IOS PRESS RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 1064-1246 UR - ISI:000232993200004 L2 - fuzzy control;control applications;open-channel hydraulic systems;gain scheduling;CONTROL ALGORITHMS SO - Journal of Intelligent & Fuzzy Systems 2005 ;16(3):189-199 13170 UI - 2261 AU - Bejosano FP AU - Joseph S AU - Lopez RM AU - Kelekci NN AU - Waniska RD AD - Texas A&M Univ, Dept Soil & Crop Sci, Cereal Qual Lab 2474 TAMUS, College Stn, TX 77843, USACO Joseph Kodamanchaly, CARE Cambodia, Phnom Penh, CambodiaInst Technol Celaya, Dept Biochem Engn, Celaya 38010, Gto, MexicoConAgra Foods, York, PA 17402, USABejosano, FP, Texas A&M Univ, Dept Soil & Crop Sci, Cereal Qual Lab 2474 TAMUS, 370 Olsen Blvd, College Stn, TX 77843 USA TI - Rheological and sensory evaluation of wheat flour tortillas during storage AB - Texture of wheat flour tortillas over 15 days at room temperature was evaluated using an expert sensory panel, consumer panels, subjective rollability test, large deformation rheological methods (i.e., bending, extensibility [1-D and 2-D], and puncture tests), and stress relaxation method. Most of the changes in texture occurred during the initial 8 days of storage, while texture of tortillas changed slowly thereafter. Differences in texture between fresh and 1-day-old tortillas were detected by many objective rheological methods but not by either sensory panel. The expert sensory panel observed a rapid decrease in tortilla extensibility and an increase in staleness between I and 8 days of storage and smaller changes in sensory scores after 8 days of storage. Most objective rheological parameters changed rapidly between 0 and 5 days, and slowly after 5 days of storage. Significant correlations and factor analysis reveal that changes occurring in flour tortillas during staling are estimated better by subjective rollability, sensory evaluation (expert and consumer panels), and 2-dimensional extensibility test than by other methods. Hence, some rheological methods are useful to estimate sensory properties of flour tortillas MH - Cambodia MH - Mexico|Guanajuato MH - USA PB - ST PAUL: AMER ASSOC CEREAL CHEMISTS RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0009-0352 UR - ISI:000229284300005 L2 - TEXTURE MEASUREMENT SO - Cereal Chemistry 2005 ;82(3):256-263 13171 UI - 2774 AU - Belfield KD AU - Yao S AU - Morales AR AU - Hales JM AU - Hagan DJ AU - Van Stryland EW AU - Chapela VM AU - Percino J AD - Univ Cent Florida, Dept Chem, Orlando, FL 32816, USAUniv Cent Florida, Coll Opt & Photon, Orlando, FL 32816, USAUniv Cent Florida, CREOL, Orlando, FL 32816, USAUniv Cent Florida, FPCE, Orlando, FL 32816, USAUniv Autonoma Puebla, Ctr Quim, Puebla 72570, MexicoBelfield, KD, Univ Cent Florida, Dept Chem, POB 162366, Orlando, FL 32816 USA TI - Synthesis and characterization absorbing polymers of novel rigid two-photon AB - Two-photon absorbing polymers with alternating fluorenyl units as a pi-conjugated bridge and bisbenzothiazole or thiazolothiazole as electron-acceptors were synthesized and characterized by IR, elemental analysis, absorption and fluorescence spectroscopy, and thermogravimetric analysis (TGA). Improvement on the solubility was observed in comparison with their phenyl based analogies. The linear absorption and emission spectra were recorded and high fluorescence quantum yields were found. Relatively large two-photon absorption cross-section per repeat unit (420 GM) were measured under fs-pulsed laser excitation. Copyright (c) 2005 John Wiley T Sons, Ltd MH - USA MH - Mexico|Puebla PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 1042-7147 UR - ISI:000227730700014 L2 - benzothiazole;thiazolothiazole;fluorescence;synthesis;thermogravimetric analysis;OPTICAL-DATA STORAGE; 2-PHOTON-ABSORBING CHROMOPHORES; FLUORENE DERIVATIVES; CROSS-SECTIONS; ABSORPTION; EXCITATION; SPECTROSCOPY; ENHANCEMENT; MOLECULES; PROPERTY SO - Polymers for Advanced Technologies 2005 ;16(2-3):150-155 13172 UI - 356 AU - Belletete M AU - Tinoco M AU - Rivera E AU - Durocher G AD - Univ Montreal, Dept Chim, Photophys Mol Lab, Montreal, PQ H3C 3J7, CanadaUniv Nacl Autonoma Mexico, Inst Invest Mat, Lab Sintesis Polimeros, Mexico City 04510, DF, MexicoDurocher, G, Univ Montreal, Dept Chim, Photophys Mol Lab, CP 6128,Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada TI - Conformational analysis and electronic properties of bicoumarin derivatives AB - The fully relaxed single-bond torsional potentials of 6,6-bicoumarin ( 1) and 3,3'-bis( methoxycarbonyl)6,6'- bicoumarin ( 2) were obtained with the aid of HF/631G* ab initio calculations. It is shown that 1 and 2 possess a nonplanar structure in their ground electronic states. ZINDO/S has been used to calculate the nature and the energy of the electronic transitions. Finally, the absorption spectra of both molecules have been recorded and correlated with the ZINDO/S calculations. The incorporation of ester groups at both ends of the molecule does not significantly change its conformation but induces a red-shift in the electronic transitions MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: CANADIAN SOCIETY ANALYTICAL SCIENCES & SPECTROSCOPY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Spectroscopy U5 - J;Article AV - English IS - 1205-6685 UR - ISI:000202945000006 L2 - torsional potential;ground electronic state;theoretical calculations;absorption;molecular structure SO - Canadian Journal of Analytical Sciences and Spectroscopy 2005 ;50(6):336-343 13173 UI - 357 AU - Belletete M AU - Tinoco M AU - Rivera E AU - Durocher G AD - Univ Montreal, Dept Chim, Photophys Mol Lab, Montreal, PQ H3C 3J7, CanadaUniv Nacl Autonoma Mexico, Inst Invest Mat, Lab Sintesis Polimeros, Mexico City 04510, DF, MexicoDurocher, G, Univ Montreal, Dept Chim, Photophys Mol Lab, CP 6128,Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada TI - Conformational analysis and electronic properties of bicoumarin derivatives AB - The fully relaxed single-bond torsional potentials of 6,6-bicoumarin ( 1) and 3,3'-bis( methoxycarbonyl)6,6'- bicoumarin ( 2) were obtained with the aid of HF/6-31G* ab initio calculations. It is shown that 1 and 2 possess a nonplanar structure in their ground electronic states. ZINDO/S has been used to calculate the nature and the energy of the electronic transitions. Finally, the absorption spectra of both molecules have been recorded and correlated with the ZINDO/S calculations. The incorporation of ester groups at both ends of the molecule does not significantly change its conformation but induces a red-shift in the electronic transitions MH - Canada MH - Mexico|Distrito Federal PB - OTTAWA: CANADIAN SOCIETY ANALYTICAL SCIENCES & SPECTROSCOPY RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Spectroscopy U5 - J;Article AV - English IS - 1205-6685 UR - ISI:000202944800009 L2 - torsional potential;ground electronic state;theoretical calculations;absorption;molecular structure SO - Canadian Journal of Analytical Sciences and Spectroscopy 2005 ;50(4):246-253 13174 UI - 3235 AU - Bellini EM AU - Elias WP AU - Gomes TAT AU - Tanaka TL AU - Taddei CR AU - Huerta R AU - Navarro-Garcia F AU - Martinez MB AD - Univ Sao Paulo, Dept Microbiol, Inst Ciencias Biomed, Sao Paulo, BrazilInst Butantan, Lab Especial Microbiol, Sao Paulo, BrazilUniv Fed Sao Paulo, Dept Microbiol Imunol & Parasitol, Sao Paulo, BrazilUniv Sao Paulo, Fac Ciencias Farmaceut, Dept Anal Clin & Toxicol, BR-05508900 Sao Paulo, BrazilCINVESTAV, IPN, Dept Cell Biol, Mexico City 14000, DF, MexicoMartinez, MB, Univ Sao Paulo, Dept Microbiol, Inst Ciencias Biomed, Sao Paulo, Brazil TI - Antibody response against plasmid-encoded toxin (Pet) and the protein involved in intestinal colonization (Pic) in children with diarrhea produced by enteroaggregative Escherichia coli AB - Enteroaggregative Escherichia eoli (EAEC) is an emerging cause of pediatric and adult travellers diarrhea. The mechanism by which EAEC induce diarrhea is not completely known. Two serine protease autotransporter proteins, named Pet and Pic have been identified in EAEC strains. Pet has enterotoxic and cytotoxic activities, while the role of Pic in pathogenesis may lie on its mucinolytic activity. Little is known about Pet and Pic biological activities in vivo. In this study the antibody responses against these autotransporter proteins in convalescent children is investigated. Fifteen (83%) children showed specific antibodies against Pet or Pic in their sera. IgG and IgM antibodies were the main isotype found. Specific antibodies against Pic, but not against Pet, were detected in sera from age-matched control group. These data show that specific anti-Pet and anti-Pic antibodies are produced during the course of a natural EAEC infection in children. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Brazil MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0928-8244 UR - ISI:000226989800019 L2 - EAEC;Pet;Pic;antibody response;IgG;IgM;IgA;diarrhea;children;SAO-PAULO; STRAINS; VIRULENCE; AUTOTRANSPORTER; ENTEROTOXIN; VOLUNTEERS; ADHERENCE; BRAZIL; CELLS; SEROTYPES SO - Fems Immunology and Medical Microbiology 2005 ;43(2):259-264 13175 UI - 1092 AU - Bello-Perez LA AU - De Francisco A AU - gama-Acevedo E AU - Gutierrez-Meraz F AU - Garcia-Suarez FJL AD - IPN, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, MexicoUniv Fed Santa Catarina, CERES Cereals Lab, Dept Food Sci & Technol, Florianopolis, SC, BrazilBello-Perez, LA, IPN, Ctr Desarrollo Prod Biot, POB 24, Yautepec 62731, Morelos, Mexico TI - Morphological and molecular studies of banana starch AB - Molecular and morphological characteristics of banana starch were determined by different spectroscopic techniques. Light and scanning electron microscopy showed the molecular order, shape and size of starch granules. Banana starch granules had a lenticular shape with an average size of 39 mu m. The Xray diffraction study showed starch granules with a pattern of a mixture between the A- and B-type polymorphs, also referred to as C-type. The absorbance ratio (1045/1022 cm(-1)) measured by infrared spectroscopy was 1.12, suggesting that the crystalline component was higher than the amorphous regions. Gelatinisation temperature assessed by differential scanning calorimetry was 77.6 degrees C with a gelatinisation enthalpy of 23.4J/g. These data stated that banana starch had a high crystallinity level, which might be important in several food applications MH - Brazil MH - Mexico|Morelos PB - LONDON: SAGE PUBLICATIONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 1082-0132 UR - ISI:000232203800006 L2 - banana;starch;X-ray diffraction;microscopy;differential scanning calorimetry;DIFFERENTIAL SCANNING CALORIMETRY; POTATO STARCH; CHAIN-LENGTH; NATIVE STARCHES; SMALL-INTESTINE; AMYLOPECTIN; CRYSTALLINITY; SPECTROSCOPY; GELATINIZATION; TEMPERATURE SO - Food Science and Technology International 2005 ;11(5):367-372 13176 UI - 3130 AU - Bello-Perez LA AU - Ottenhof MA AU - gama-Acevedo E AU - Farhat IA AD - Ctr Desarrollo Prod Biot, IPN, Yautepec 62731, Morelos, MexicoUniv Nottingham, Div Food Sci, Loughborough LE12 5RD, Leics, EnglandBello-Perez, LA, Ctr Desarrollo Prod Biot, IPN, Km 8-5 Carr,Apartado Postal 24, Yautepec 62731, Morelos, Mexico TI - Effect of storage time on the retrogradation of banana starch extrudate AB - Starch was isolated from banana starch and the retrogradation phenomenon was studied using diverse techniques, including an enzymatic measurement. Wide-angle X-ray scattering (WAXS) showed that the sample stored for 7 h presented small peaks and when the storage time increased the peaks increased in intensity. The type of diffraction pattern found in banana extrudates is typical of the A-type crystal polymorph. The crystallinity index from the diffractograms, showed a plateau after similar to20 h of storage. The short-range order measurement with Fourier transform infrared (FTIR) spectroscopy showed that banana starch retrogradation reached a maximum value at approximately 11 h of storage, a value that agrees with the results obtained with differential scanning calorimetry (DSC), because the maximum enthalpy value (approximately 5 J/g) was calculated in the stored sample for 8 h, without changes in the stored samples for more time. Retrograded resistant starch values did not change after 12 h of storage, obtaining the maximum starch retrogradation level. FTIR, DSC, and the enzymatic technique showed the changes at the molecular level in starch during storage; in the case of WAXS, they determine the long-range order that explains the differences found in the starch retrogradation pattern measurement in banana starch MH - United Kingdom MH - Mexico|Morelos PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000227079800038 L2 - banana starch;retrogradation;X-ray diffraction;infrared spectroscopy;differential scanning calorimetry;WAXY-MAIZE STARCH; POTATO STARCH; GELATINIZATION; SPECTROSCOPY; AMYLOPECTIN; BEHAVIOR; PASTES SO - Journal of Agricultural and Food Chemistry 2005 ;53(4):1081-1086 13177 UI - 2322 AU - Bello-Pineda J AU - Liceaga-Correa M AU - Hernandez-Nunez HH AU - Ponce-Hernandez R AD - Trent Univ, Watershed Ecosyst Grad Program, Peterborough, ON K9J 7B8, CanadaIPN, Ctr Invest & Estudios Avanzados, Merida, Yucatan, MexicoBello-Pineda, J, Trent Univ, Watershed Ecosyst Grad Program, Symons Campus,1600 W Bank Dr, Peterborough, ON K9J 7B8, Canada TI - Using aerial video to train the supervised classification of Landsat TM imagery for coral reef habitats mapping AB - Management of coral reef resources is a challenging task, in many cases, because of the scarcity or inexistence of accurate sources of information and maps. Remote sensing is a not intrusive, but powerful tool, which has been successfully used for the assessment and mapping of natural resources in coral reef areas. In this study we utilized GIS to combine Landsat TM imagery, aerial photography, aerial video and a digital bathymetric model, to assess and to map submerged habitats for Alacranes reef, Yucatan, Mexico. Our main goal was testing the potential of aerial video as the source of data to produce training areas for the supervised classification of LandsatTM imagery. Submerged habitats were ecologically characterized by using a hierarchical classification of field data. Habitats were identified on an overlaid image, consisting of the three types of remote sensing products and the bathymetric model. Pixels representing those habitats were selected as training areas by using GIS tools. Training areas were used to classify the Landsat TM bands 1, 2 and 3 and the bathymetric model by using a maximum likelihood algorithm. The resulting thematic map was compared against field data classification to improve habitats definition. Contextual editing and reclassification were used to obtain the final thematic map with an overall accuracy of 77%. Analysis of aerial video by a specialist in coral reef ecology was found to be a suitable source of information to produce training areas for the supervised classification of Landsat TM imagery in coral reefs at a coarse scale MH - Canada MH - Mexico|Yucatan PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0167-6369 UR - ISI:000228971100010 L2 - aerial video;Alacranes reef;coral reef mapping;habitat classification;Landsat TM;training areas SO - Environmental Monitoring and Assessment 2005 ;105(1-3):145-164 13178 UI - 2404 AU - Bello PJ AU - Rios LV AU - Liceaga CMA AU - Zetina MC AU - Cervera CK AU - Arceo BP AU - Hernandez NH AD - Inst Nacl Pesca, Ctr Invest Pesquera Yucalpeten, Yucatan, MexicoTrent Univ, Watershed Ecosyst Grad Program, Peterborough, ON K9J 7B8, CanadaCtr Invest & Estudios Avanzados Merida, Yucatan, MexicoUniv Autonoma Yucatan, Fac Ingn, Yucatan, MexicoRios, LV, Inst Nacl Pesca, Ctr Invest Pesquera Yucalpeten, AP-73 Progreso, Yucatan, Mexico TI - Incorporating spatial analysis of habitat into spiny lobster (Panulirus argus) stock assessment at Alacranes reef, Yucatan, Mexico AB - In this paper, spatial analysis of submerged habitats was incorporated into spiny lobster (Panulirus argus) stock assessment at Alacranes reef, Yucatan, Mexico. Two sources of information were used: a thematic map of submerged habitats obtained using a Landsat TM satellite image and "geo-referenced" field data for lobster catches obtained during July 1998 and February 1999. Geographical information systems (GIS) tools were used as the major basis for displaying, analysing and relating lobster catches data and the thematic map information. Estimations of lobster abundance, density and biomass per habitat class and for the whole reef, at the beginning and end of the fishing season, were obtained. Utilizing Monte Carlo modelling, uncertainty was incorporated to estimations of transects initial and final position, appreciation of area and probability to detect lobsters. Results were compared against commercial catches reported for the previous year. The distribution of fishing effort is also described. © 2005 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000228940400005 L2 - Landsat TM;GIS;Panulirus argus;habitat mapping;stock assessment;lobster fishery;CORAL-REEFS; MANAGEMENT; RESOURCES SO - Fisheries Research 2005 ;73(1-2):37-47 13179 UI - 418 AU - Bellon MR AU - Hodson D AU - Bergvinson D AU - Beck D AU - Martinez-Romero E AU - Montoya Y AD - Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoBellon, MR, Int Plant Genet Resources Inst, Via Tre Denari 472-A, I-00057 Rome, Italy TI - Targeting agricultural research to benefit poor farmers: Relating poverty mapping to maize environments in Mexico AB - We explore approaches for targeting agricultural research to benefit poor farmers. Using small area estimation methods and spatial analysis, we generated high-resolution poverty maps and combined them with geo-referenced biophysical data relevant to maize-based agriculture in Mexico. We used multivariate classification and cluster analysis to synthesize biophysical data relevant for crop performance with rural poverty data. Results show that the rural poor are concentrated in particular regions and under particular circumstances. Formal maize germplasm improvement trials were largely outside the core areas of rural poverty and there was little evidence for direct spillover of improved germplasm. Agro-climatic classification used for targeting breeding is useful but often ignores some important factors identified as relevant for the poor. Combining this method with poverty mapping improves stratifying and targeting crop breeding efforts to meet the demands of resource-poor farmers. We believe this integrated approach will help increase benefits from agricultural research to poor rural communities. (c) 2005 Elsevier Ltd. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Agricultural Economics & Policy;Economics;Food Science & Technology;Nutrition & Dietetics U5 - J;Article NT - DUPLICATE AV - English IS - 0306-9192 UR - ISI:000233793000003 L2 - poverty mapping;maize mega-environments;targeting crop breeding;biophysical data;rural poor;Mexico SO - Food Policy 2005 ;30(5-6):476-492 13180 UI - 1774 AU - Beltran-Miranda CP AU - Khan A AU - Jaloma-Cruz AR AU - Laffan MA AD - Hammersmith Hosp, Imperial Coll London, Dept Haematol, London W12 0NN, EnglandCtr Invest Biomed Occidente, IMSS, Div Genet, Guadalajara, Jalisco, MexicoLaffan, MA, Hammersmith Hosp, Imperial Coll London, Dept Haematol, London W12 0NN, England TI - Thrombin generation and phenotypic correlation in haemophilia A AB - The clinical phenotype of patients with haemophilia A (HA) often differs between individuals with the same factor VIII (FVIII) gene defect (e.g. within the same family) or the same coagulant activity of FVIII (FVIII:C). We proposed that because the thrombin generation assay in platelet-poor plasma of HA patients provides more information [peak thrombin concentration, endogenous thrombin potential (ETP), rate of thrombin generation and lag-time] than a clot-based FVIII assay it might provide insight into these differences. We therefore investigated the relation between the results of the thrombin generation assay and the clinical severity in nine families with HA (23 patients with different phenotypes). We also examined the contribution of prothrombotic risk factors: (FV Leiden G1691A and prothrombin G20210A), the coagulant activity of FVIII and tissue factor (5'UTR) polymorphisms. Our data detect marked differences between individuals but these did not correlate with the reported clinical phenotype. These differences were also reflected in a marked difference in response to the therapeutic amounts of FVIII. This might account for differences in amounts of treatment consumption. Reduced peak and possibly rate of thrombin generation, rather than FVIII:C or ETP appear to represent the critical defects in FVIII-deficient plasma. We suggest that the analysis of parameters in thrombin generation is a useful tool to detect bleeding tendency in HA but not to predict the modulation of the haemorrhagic tendency in patients within families. However the presence of the other factors such as vessel wall components, protein C and platelets might need to be incorporated into this system MH - United Kingdom MH - Mexico|Jalisco PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 12 U4 - Hematology U5 - J;Article AV - English IS - 1351-8216 UR - ISI:000230432600004 L2 - endogenous thrombin potential;factor VIII coagulant activity;FVIII-deficient plasma;haemophilia A;platelet-poor plasma;thrombin generation assay;PLATELET-RICH PLASMA; FACTOR-V-LEIDEN; TISSUE FACTOR GENE; BLOOD-COAGULATION; RISK-FACTORS; MUTATION; POLYMORPHISMS; EXPRESSION SO - Haemophilia 2005 ;11(4):326-334 13181 UI - 147 AU - Beltz KM AU - Rosales MM AU - Morales E AD - Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Patol, Mexico City 04510, DF, MexicoTexas A&M Univ, Coll Vet Med, Sch Biomed Sci, College Stn, TX 77843, USAMorales, E, Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Patol, Mexico City 04510, DF, Mexico TI - Histological and ultrastructural findings in commercial bred rabbits exhibiting severe diarrhea AB - The objective of this study was to describe histological and ultrastructural findings in the intestine of 8 rabbits exhibiting severe diarrhea, a problem which occasionally severely effects commerceila rabbit breading operations.. Microscopic lesions from the small and large intestines were very similar to those described in the mucoid enteritis complex. Histological lesions included mucoid neutrophilic or lymphocytic-plasmacytic enteritis with atropy and fusion of the villi, hyperplasia of the goblet cells and submucosal and serosal edema in the small intestine. Escherichia coli was isolated from 3 animals. The ultrastructural study revealed in addition to hyperplasia of goblet cells, loss of microvilli in the small intestine. Furthermore pseudonuclear inclusions surrounded by true nuclear membrane and free intranuclear and intracytoplasmic virus-like particles were observed in all rabbits. It was concluded that the diarrhea had a multi-factorial etiology.. probably due to change in feed, bacterial proliferation and bacterial coinfection with enteric virus MH - Mexico|Distrito Federal MH - USA PB - SOBORG: SCANDINAVIAN FEDERATION LABORATORY ANIMAL SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0901-3393 UR - ISI:000235012200005 L2 - ROTAVIRUS; INFECTION; HERPESVIRUS; CORONAVIRUS; ENTERITIS; VIRUS; PATHOGENICITY; ENTEROPATHY; INTESTINE; BACTERIA SO - Scandinavian Journal of Laboratory Animal Science 2005 ;32(4):243-250 13182 UI - 478 AU - Ben Youssef C AU - Goma G AU - Olmos-Dichara A AD - Univ Politecn Pachuca, Carretera Pachuca Sahagun, Municipio Zempoala 43830, Hidalgo, MexicoInst Natl Sci Appl, CNRS, UMR 5504, Ctr Bioingn Gilbert Durand, F-31077 Toulouse, FranceInst Natl Sci Appl, LA INRA, F-31077 Toulouse, FranceUniv Autonoma Metropolitana Iztapalapa, Dept Biotecnol, Iztapalapa 09340, DF, MexicoBen Youssef, C, Univ Politecn Pachuca, Carretera Pachuca Sahagun, Km 20, Municipio Zempoala 43830, Hidalgo, Mexico TI - Kinetic modelling of Lactobacillus casei ssp rhamnosus growth and lactic acid production in batch cultures under various medium conditions AB - Enrichment of medium with yeast extract and tryptone increased growth and lactic acid production in batch cultures of Lactobacillus casei ssp. rhamnosus. A reliable kinetic model that explicitly expresses the strong relationship between microbial growth, lactic acid production and medium enrichment is provided and validated using experimental data obtained with six different medium compositions MH - France MH - Mexico|Distrito Federal MH - Mexico|Hidalgo PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Biotechnology & Applied Microbiology U5 - J;Article AV - English IS - 0141-5492 UR - ISI:000233634500009 L2 - batch culture;kinetic modelling;lactic acid;Lactobacillus casei;LACTATE FERMENTATION; WHEY PERMEATE; YEAST EXTRACT; HELVETICUS SO - Biotechnology Letters 2005 ;27(22):1785-1789 13183 UI - 221 AU - Benavides AL AU - Lago S AU - Garzon B AU - Rull LF AU - Del Rio F AD - Univ Pablo Olavide, Dpto Ciencias Ambientales, Seville 41013, SpainUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoUniv San Pablo, CEU, Fac Farm, Dept Matemat Fis Aplicada & Fisicoquim, Madrid, SpainUniv Sevilla, Area Fis Teor, Dept Fis Atom Mol & Nucl, E-41080 Seville, SpainUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoLago, S, Univ Pablo Olavide, Dpto Ciencias Ambientales, Ctra Utrera Km1, Seville 41013, Spain TI - Liquid-vapour equilibrium of multipolar square-well fluids. Gibbs ensemble simulations and equation of state AB - Simulation results for a system comprising a square well plus either a point dipole or a point quadrupole are presented. The properties obtained are the vapour-liquid equilibrium densities and the critical properties. Critical densities are not very sensitive to the values of dipole or quadrupole, while critical temperatures increase significantly when the multipole strength rises. A comparison with a perturbation theory for multipolar square-well systems is presented. Overall agreement between simulated and theoretical values is good when comparison is restricted to quadrupoles or dipoles corresponding to the most relevant real polar substances but is only moderate for the largest multipolar strengths considered MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Spain PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0026-8976 UR - ISI:000234467600003 L2 - CORRESPONDING-STATES; DIPOLAR FLUIDS; COMPUTER-SIMULATION; PERTURBATION-THEORY; QUADRUPOLAR FLUIDS; THERMODYNAMICS; DEPARTURES; PRINCIPLE; BEHAVIOR; RANGE SO - Molecular Physics 2005 ;103(24):3243-3251 13184 UI - 2041 AU - Bendix O AU - Mendez-Bermudez JA AU - Luna-Acosta GA AU - Kuhl U AU - Stockmann HJ AD - Max Planck Inst Dynam & Selbstorganisat, D-37073 Gottingen, GermanyUniv Autonoma Puebla, Inst Fis, Puebla 72570, MexicoUniv Marburg, Fachbereich Phys, D-35032 Marburg, GermanyMendez-Bermudez, JA, Max Planck Inst Dynam & Selbstorganisat, Bunsenstr 10, D-37073 Gottingen, Germany TI - Design of beam splitters and microlasers using chaotic waveguides AB - We consider waveguides formed by single or multiple two-dimensional chaotic cavities connected to leads. The cavities are chaotic in the sense that the ray (or equivalently, classical particle) dynamics within them is chaotic. Geometrical parameters are chosen to produce a mixed phase space (chaotic regions surrounding islands of stability where motion is regular). Incoming rays (or particles) cannot penetrate into these islands but incoming plane waves dynamically tunnel into them at a certain discrete set of frequencies (energies). The support of the corresponding quasi-bound states is along the trajectories of periodic orbits trapped within the cavity. We take advantage of this difference in the ray/wave behavior to demonstrate how chaotic waveguides can be used to design beam splitters and microlasers. We also present some preliminary experimental results in a microwave realization of such chaotic waveguide. (c) 2005 Elsevier Ltd. All rights reserved MH - Germany MH - Mexico|Puebla PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Nanoscience & Nanotechnology U5 - J;Article AV - English IS - 0026-2692 UR - ISI:000229666000032 L2 - beam splitter;microlaser;quantum chaos/wave chaos;BILLIARDS SO - Microelectronics Journal 2005 ;36(3-6):285-288 13185 UI - 2202 AU - Benet L AU - Broch J AU - Merlo O AU - Seligman TH AD - UNAM, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoCtr Int Ciencias AC, Cuernavaca 62131, Morelos, MexicoUniv Basel, Inst Phys, CH-4056 Basel, SwitzerlandBenet, L, UNAM, Ctr Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico TI - Symmetry breaking: A heuristic approach to chaotic scattering in many dimensions AB - As the theory of chaotic scattering in high-dimensional systems is poorly developed, it is very difficult to determine initial conditions for which interesting scattering events, such as long delay times, occur. We propose to use symmetry breaking as a way to gain the insight necessary to determine low-dimensional subspaces of initial conditions in which we can find such events easily. We study numerically the planar scattering off a disk moving on an elliptic Kepler orbit, as a simplified model of the elliptic restricted three-body problem. When the motion of the disk is circular, the system has an integral of motion, the Jacobi integral, which is no longer conserved for nonvanishing eccentricity. In the latter case, the system has an effective five-dimensional phase space and is therefore not amenable for study with the usual methods. Using the symmetric problem as a starting point we define an appropriate two-dimensional subspace of initial conditions by fixing some coordinates. This subspace proves to be useful to define scattering experiments where the rich and nontrivial dynamics of the problem is illustrated. We consider in particular trajectories which take very long before escaping or are trapped by consecutive collisions with the disk MH - Mexico|Morelos MH - Switzerland PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000228818200088 L2 - HAMILTONIAN-SYSTEMS; PLANETARY RINGS; PHASE-SPACE; SINGULARITIES; OSCILLATOR SO - Physical Review e 2005 ;71(3): 13186 UI - 3420 AU - Benet L AU - Kun SY AU - Qi W AU - Denisov V AD - UNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, MexicoCtr Int Fis, Cuernavaca, Morelos, MexicoAustralian Natl Univ, Ctr Nonlinear Phys, RSPhysSE, Canberra, ACT 0200, AustraliaAustralian Natl Univ, Dept Theoret Phys, RSPhysSE, Canberra, ACT 0200, AustraliaChinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R ChinaNucl Res Inst, UA-03680 Kiev, UkraineBenet, L, UNAM, Ctr Ciencias Fis, Cuernavaca, Morelos, Mexico TI - Effect of a finite-time resolution on Schrodinger cat states in complex collisions AB - We study the effect of finite-time resolution on coherent superpositions of clockwise and anticlockwise rotating wave packets in the regime of strongly overlapping resonances of the intermediate complex. Such highly excited deformed complexes may be created in binary collisions of heavy-ions, molecules and atomic clusters. It is shown that time averaging reduces the interference fringes acting effectively as dephasing. We propose a simple estimate of the "critical" time averaging interval. For the time averaging intervals bigger than the critical one the interference fringes wash out appreciably. This is confirmed numerically. We evaluate minimal energy intervals for measurements of the excitation functions needed to observe the Schrodinger cat states. These should be easily observable in heavy-ion scattering. Such an experiment is suggested. (C) 2004 Elsevier B.V. All rights reserved MH - Australia MH - Mexico|Morelos MH - Peoples R China MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000226217900012 L2 - Schrodinger cat states;wave packets;heavy-ion scattering;strongly overlapping resonances;atomic clusters;INVARIANT-MANIFOLDS; SUPERPOSITION; DECOHERENCE SO - Physics Letters B 2005 ;605(1-2):101-105 13187 UI - 2203 AU - Benhenni M AU - de Urquijo J AU - Yousfi M AU - Hernandez-Avila JL AU - Merbahi N AU - Hinojosa G AU - Eichwald O AD - Univ Toulouse 3, CPAT, CNRS, UMR 5002, F-31062 Toulouse, FranceUniv Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, MexicoUniv Autonoma Metropolitana, CBI Energia, Mexico City 02200, DF, MexicoYousfi, M, Univ Toulouse 3, CPAT, CNRS, UMR 5002, 118 Route Narbonne, F-31062 Toulouse, France TI - Measured and calculated SF6- collision and swarm ion transport data in SF6-Ar and SF6-Xe mixtures AB - The measurement of the mobility of SF6- in the mixtures SF6-Ar and SF6-Xe is reported over the density-reduced electric field strength E/N 1-180 Td (1 Townsend=10(-17) V cm(2)), from a time-resolved pulsed Townsend technique. Simultaneously, the mobility of SF6- in the same binary mixtures has been calculated from a set of collision cross sections for SF6--Ar, SF6--Xe, and SF6--SF6 using a Monte Carlo simulation procedure for ion transport. The good agreement between measured and calculated mobilities in these gas mixtures has led us to conclude that the validation of our cross section sets is confirmed. The elastic collision cross section, a predominant process for ion energies lower than about 10 eV, was determined from a semiclassical JWKB approximation using a rigid core potential model for the ion-neutral systems under consideration. This elastic cross section was then added to several other inelastic collision cross sections found in the literature for ion conversion, electron detachment of SF6- and charge transfer. Moreover, the calculations of the mobility and the ratios of the transverse and longitudinal diffusion coefficients to the mobility were extended into a much wider E/N range from 1 to 4000 Td. Additionally, we have also calculated the energy distribution functions and the reaction coefficients for ion conversion and electron detachment. Finally, we have shown that the range of validity for the calculation of the mobility in gas mixtures from Blanc's law is only valid for the low E/N region, where the interaction is dominated by elastic collisions and the ion distribution function remains essentially Maxwellian MH - France MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000228818200110 L2 - LONGITUDINAL DIFFUSION; GAS-MIXTURES; SULFUR HEXAFLUORIDE; ELECTRON DETACHMENT; CROSS-SECTIONS; BLANCS LAW; MOBILITY; FIELD; DISCHARGES; ATTACHMENT SO - Physical Review e 2005 ;71(3): 13188 UI - 858 AU - Bensaada M AU - Esselaoui D AU - Saramito P AD - Univ Ibn Tofail, Fac Sci, Dept Math & Informat, Lab SIANO, Mexico City 14000, DF, MexicoIMAG, LMC, F-38041 Grenoble 9, FranceEsselaoui, D, Univ Ibn Tofail, Fac Sci, Dept Math & Informat, Lab SIANO, BP 133, Mexico City 14000, DF, Mexico TI - Second-order Galerkin-Lagrange method for the Navier-Stokes equations AB - This article introduces a new second-order characteristic mixed finite element approximation for Navier-Stokes equation. Optimal error estimates are proved in the framework of L-2-theory. (c) 2005 Wiley Periodicals, Inc MH - France MH - Mexico|Distrito Federal PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0749-159X UR - ISI:000232748600005 L2 - second-order characteristic method;mixed finite element method;Navier-Stokes equation;convergence;FINITE-ELEMENT-METHOD; ALGORITHM SO - Numerical Methods for Partial Differential Equations 2005 ;21(6):1099-1121 13189 UI - 3442 AU - Bergeron BV AU - Marton A AU - Oskam G AU - Meyer GJ AD - Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218, USAJohns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218, USACINVESTAV, IPN, Dept Fis Aplicada, Merida 97310, Yuc, MexicoMeyer, GJ, Johns Hopkins Univ, Dept Chem, Charles & 34Th St, Baltimore, MD 21218 USA TI - Dye-sensitized SnO2 electrodes with iodide and pseudohalide redox mediators AB - Dye-sensitized mesoporous nanocrystalline SnO2 electrodes and the pseudohalogen redox mediator (SeCN)(2)/ SeCN- or (SCN)(2)/SCN- or the halogen redox mediator I-3(-)/I- were implemented for regenerative solar cell studies. Adsorption isotherms of the sensitizers Ru(deeb)(bpy)(2)(PF6)(2), Ru(deeb)(2)(dpp)(PF6)(2), and Ru(deeb)(2)-(bpz)(PF6)(2), where deeb is 4,4'-diethylester-2,2'-bipyridine. dpp is 2,3-dipyridyl pyrazine, and bpz is bipyrazine, binding to the SnO2 surface were well described by the Langmuir model from which the saturation coverage. Gamma(0) = 1.7 x 10(-8) mol/cm(2), and surface-adduct formation constant, K-2d = 2 x 10(5) M-1, were obtained. Following excited-state interfacial electron transfer. the oxidized sensitizers were reduced by donors present in the acetonitrile electrolyte as shown by transient absorption spectroscopy. With iodide as the donor. a rate constant k > 10(8) s(-1) was measured for sensitizer regeneration. In regenerative solar cells, it was found that the incident photon-to-current conversion efficiencies and open circuit voltages (V-alpha) were comparable for (SeCN)(2)/SeCN- and I-3(-)/I- for all three sensitizers. The V-oc varied linearly with the logarithm of the short circuit photocurrent densities (J(sc)), with typical correlations of similar to50-60 mV/decade. Capacitance measurements of the SnO2 electrode in the presence of I-3(-)/I-, (SeCN)(2)/SeCN-, or (SCN)(2)/SCN- are reported MH - USA MH - Mexico|Yucatan PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1520-6106 UR - ISI:000226313200040 L2 - NANOCRYSTALLINE TIO2 INTERFACES; RUTHENIUM POLYPYRIDYL COMPLEX; SOLAR-CELLS; PHOTOELECTROCHEMICAL CELLS; SEMICONDUCTOR INTERFACES; CHARGE SEPARATION; FLASH-PHOTOLYSIS; VISIBLE-LIGHT; IONIC LIQUID; THIN-FILMS SO - Journal of Physical Chemistry B 2005 ;109(2):937-943 13190 UI - 1079 AU - Berman-Mendoza D AU - ceves-Mijares M AU - Berriel-Valdos LR AU - Carranza J AU - Pedraza J AU - Dominguez-Horna C AU - Falcony C AD - Inst Nacl Astrofis Opt & Elect, Puebla 72000, MexicoCSIC, IMB, CNM, Bellaterra 08913, SpainCINVESTAV, Mexico City 07000, DF, MexicoBerman-Mendoza, D, Inst Nacl Astrofis Opt & Elect, Apdo 51, Puebla 72000, Mexico TI - Silicon-rich silicon oxide films boost UV sensitivity MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - Spain PB - NASHUA: PENNWELL PUBL CO RP - NOT IN FILE U3 - TC 1 U4 - Optics U5 - J;Article AV - English IS - 0740-2511 UR - ISI:000232124000034 SO - Laser Focus World 2005 ;41(9):103-105 13191 UI - 525 AU - Bermudez-Humaran LG AU - Cortes-Perez NG AU - Lefevre F AU - Guimaraes V AU - Rabot S AU - cocer-Gonzalez JM AU - Gratadoux JJ AU - Rodriguez-Padilla C AU - Tamez-Guerra RS AU - Corthier G AU - Gruss A AU - Langella P AD - Inst Natl Rech Agron, Unite Ecol & Physiol Syst Digest, Jouy En Josas, FranceUnite Rech Laitieres & Genet Appl, Jouy En Josas, FranceUnite Virol & Immunol Mol, Jouy En Josas, FranceUniv Autonoma Nuevo Leon, Lab Immunol & Virol, Fac Ciencias Biol, Nuevo Leon, MexicoLangella, P, Inst Natl Rech Agron, Unite Ecol & Physiol Syst Digest, Domaine Vilvert, Jouy En Josas, France TI - A novel mucosal vaccine based on live lactococci expressing E7 antigen and IL-12 induces systemic and mucosal immune responses and protects mice against human papillomavirus type 16-induced tumors AB - Current strategies to prevent or treat human papillomavirus type 16 (HPV-16) infection are promising, but remain costly. More economical but efficient vaccines are thus needed. In this study, we evaluated the protective effects of mucosally coadministered live Lactococcus lactis strains expressing cell wall-anchored E7 Ag and a secreted form of IL-12 to treat HPV-16-induced tumors in a murine model. When challenged with lethal levels of tumor cell line TC-1 expressing E7, immunized mice showed full prevention of TC-1-induced tumors, even after a second challenge, suggesting that this prophylactic immunization can provide long-lasting immunity. Therapeutic immunization with L. lactis recombinant strains, i.e., 7 days after TC-1 injection, induced regression of palpable tumors in treated mice. The antitumor effects of vaccination occurred through a CTL response, which is CD4(+) and CD8(+) dependent. Furthermore, immunized mice developed an E7-specitic mucosal immune response. These preclinical results suggest the feasibility of the low-cost mucosal vaccination and/or immunotherapy strategies against HPV-related cervical cancer in humans MH - France MH - Mexico|Nuevo Leon PB - BETHESDA: AMER ASSOC IMMUNOLOGISTS RP - NOT IN FILE U3 - TC 20 U4 - Immunology U5 - J;Article AV - English IS - 0022-1767 UR - ISI:000233544200029 L2 - INTERFERON-GAMMA PRODUCTION; CELL STIMULATORY FACTOR; TOXIN FRAGMENT-C; CERVICAL-CANCER; ESTABLISHED TUMORS; TETANUS TOXIN; LACTIS; INTERLEUKIN-12; CYTOKINE; DELIVERY SO - Journal of Immunology 2005 ;175(11):7297-7302 13192 UI - 1014 AU - Bermudez-Rattoni F AU - Okuda S AU - Roozendaal B AU - McGaugh JL AD - Univ Calif Irvine, Ctr Neurobiol Learning & Memory, Irvine, CA 92697, USAUniv Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697, USAUniv Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697, USAUniv Nacl Autonoma Mexico, Dept Neurociencias, Inst Fisiol Celular, Mexico City 04510, DF, MexicoBanyu Pharmaceut Co Ltd, Tsukuba Res Inst, CNS Disorder Res, Tsukuba, Ibaraki 3002611, JapanBermudez-Rattoni, F, Univ Calif Irvine, Ctr Neurobiol Learning & Memory, Irvine, CA 92697 USA TI - Insular cortex is involved in consolidation of object recognition memory MH - USA MH - Japan MH - Mexico|Distrito Federal PB - WOODBURY: COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences;Psychology, Experimental U5 - J;Article AV - English IS - 1072-0502 UR - ISI:000232243600002 L2 - CONDITIONED TASTE-AVERSION; INHIBITORY AVOIDANCE; PERIRHINAL CORTEX; RAT; ACETYLCHOLINE; PROJECTIONS; ANTERIOR; NOVELTY; LESIONS; HIPPOCAMPUS SO - Learning & Memory 2005 ;12(5):447-449 13193 UI - 3342 AU - Bermudez MD AU - Brostow W AU - Carrion-Vilches FJ AU - Cervantes JJ AU - Pietkiewicz D AD - Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUniv Politecn Cartagena, Dept Ingn Mat & Fabricat, Grp Ciencia Mat & Ingn Met, Cartagena 30202, SpainUniv Nacl Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76001, Qro, MexicoBrostow, W, Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203 USA TI - Friction and multiple scratch behavior of polymer plus monomer liquid crystal systems AB - We have studied in turn: polystyrene (PS), styrene/acrylonitrile (SAN) and Polyamide 6 (PA6), adding each time to the polymer 1,3,5,7 or 10 wt% of 4,4'-dibutylazobenzene (LC1) which is a monomer liquid crystal (MLC). LC1 reduces both static and dynamic friction of PS and SAN against stainless steels or polytetrafluoroethylene (PTFE). By contrast, friction values are lower for pure PA6 than for PA6 modified with various MLCs or with MoS2. Multiple scratching tests were carried out with a micro scratch tester on every system between 2.5 and 15 N. The presence of LC1 in PS reduces penetration depth and residual depth and increases the viscoelastic recovery. So far PS was the only polymer, which does not show strain hardening in multiple scratching. The present results confirms this, but it also shows that only 1 wt% of LC reduces the brittleness of PS so that strain hardening appears. This effect is maintained at all higher concentrations of LC1 investigated as well. For SAN or PA6, additions of LC1 reduce penetration depth values with respect to pure polymers, but do not have a significant effect on viscoelastic recovery. Scanning electron microscopy (SEM) was used to study the deformation and wear mechanisms, and to relate the data obtained in multiple scratch sliding wear tests. For PS we see in SEM that increasing the LC1 concentration causes a more ductile behavior, with less crack nucleation. For SAN the debris accumulation in sliding wear is mitigated by the presence of the liquid crystalline lubricant. No debris formation is observed in PA6, with or without a lubricant. (C) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Queretaro MH - Spain MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 6 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000226406600007 L2 - scratch resistance;sliding wear;multiple scratching;COMPOSITE HALF-PLANES; TRIBOLOGICAL PROPERTIES; FLUOROPOLYMER ADDITION; NANO-INDENTATION; LUBRICANT; CONTACT; EPOXY; AZOBENZENES; INTERFACES; LAYERS SO - Polymer 2005 ;46(2):347-362 13194 UI - 3473 AU - Bermudez MD AU - Brostow W AU - Carrion-Vilches FJ AU - Cervantes JJ AU - Pietkiewicz D AD - Univ Politecn Cartagena, Dept Ingn Mat & Fabricac, Grp Ciencia Mat & Ingn Met, Cartagena 30202, SpainUniv N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, CFATA, Queretaro 76000, MexicoBrostow, W, Univ Politecn Cartagena, Dept Ingn Mat & Fabricac, Grp Ciencia Mat & Ingn Met, C Doctor Fleming S-N, Cartagena 30202, Spain TI - Wear of thermoplastics determined by multiple scratching AB - We studied wear resistance in sliding by multiple scratching along the same groove for a variety of thermoplastics: polystyrene, styrene-acrylonitrile, polyamide 6 and polysulfone. Constant-load experiments were carried out with a micro scratch tester for several loads between 2.5 and 15 N; each time 15 scratches were performed. Except for polystyrene, all materials show an asymptotic residual depth as a function of the number of scratch tests performed. In contrast to other materials, polystyrene exhibits brittleness and debris formation. Scanning electron microscopy and scanning probe microscopy were used to characterize the deformation and wear mechanisms and were connected to the wear data obtained by multiple scratching. At 15 N we found a viscoelastic recovery for polystyrene of 27.8% while for polyamide 6 the corresponding value is 80.2% MH - Mexico|Queretaro MH - Spain MH - USA PB - STRASBOURG: EUROPEAN POLYMER FEDERATION RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 1618-7229 UR - ISI:000226287400001 L2 - SINGLE-CRYSTALS; POLYMERS; ADDITIVES; BEHAVIOR; STEEL SO - E-Polymers 2005 ;(): 13195 UI - 849 AU - Bernabe P AU - Peniche C AU - rguelles-Monal W AD - CIAD, Unidad Guaymas, Guaymas 84000, Sonora, MexicoUniv La Habana, Inst Mat & React, Havana 10400, CubaUniv La Habana, Ctr Biomat, Havana 10400, CubaArguelles-Monal, W, CIAD, Unidad Guaymas, Carret Varadero Nacl Km 6-6,Aptdo Postal 284, Guaymas 84000, Sonora, Mexico TI - Swelling behavior of chitosan/pectin polyelectrolyte complex membranes. Effect of thermal cross-linking AB - Membranes of the polyelectrolyte complex between chitosan and pectin were prepared by precipitating the complex from a mixture of both polysaccharides. It was shown that the swelling kinetics of these membranes follows a Fickean behavior. The membranes were heated at 120 degrees C in order to convert the -NH3+-OOC- salt bonds into amide bonds. The thermally treated membranes were stable in strongly acid and basic media. The extent of amide bond formation was followed by FTIR spectroscopy. It was found that as the reaction time increased, both the absorbance ratio A(1744)/A(1082) and the maximum swelling of the membrane decreased. The surface morphology of the membranes did not vary appreciably with the thermal treatment MH - Cuba MH - Mexico|Sonora PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Polymer Science U5 - J;Article AV - English IS - 0170-0839 UR - ISI:000232694000008 L2 - DRUG-DELIVERY; PECTIN; RELEASE; PH; HYDROGEL SO - Polymer Bulletin 2005 ;55(5):367-375 13196 UI - 1523 AU - Bernal-Garcia JM AU - Hall KR AU - Estrada-Baltazar A AU - Iglesias-Silva GA AD - Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, MexicoTexas A&M Univ, Dept Chem Engn, College Stn, TX 77843, USAInst Mexicano Petr, Mexico City 07330, DF, MexicoIglesias-Silva, GA, Inst Tecnol Celaya, Dept Ingn Quim, Guanajuato 38010, Mexico TI - Density and viscosity of aqueous solutions of N,N-dimethylethanolamine at p=0.1 MPa from T = (293.15 to 363.15) K AB - This work presents atmospheric density and viscosity values for (N,N-dimethylethanolamine + water) over the entire composition range from T = (293.15 to 363.15) K for density and from T = (313.15 to 353.15) K for viscosity. Density measurements come from a vibrating tube densimeter while we have used three different Cannon-Fenske viscosimeters for the viscosity measurements. Excess molar volumes and viscosity deviations are calculated using a Redlich-Kister type equation. Excess molar volumes present negative deviations from ideality and viscosity deviations are positive at all temperatures and compositions in this work. (c) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 1 U4 - Thermodynamics;Chemistry, Physical U5 - J;Article AV - English IS - 0021-9614 UR - ISI:000231010100003 L2 - N,N-dimethylethanolamine;water;density;viscosity;excess properties;VOLUMETRIC PROPERTIES; METHYLDIETHANOLAMINE; TEMPERATURES SO - Journal of Chemical Thermodynamics 2005 ;37(8):762-767 13197 UI - 876 AU - Bernal JP AU - Eggins SM AU - McCulloch MT AD - Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, AustraliaAustralian Natl Univ, Dept Geol, CRC LEME, Canberra, ACT 0200, AustraliaBernal, JP, Univ Nacl Autonoma Mexico, Inst Geol, Dept Geoquim, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Accurate in situ U-238-U-234-Th-232-Th-230 analysis of silicate glasses and iron oxides by laser-ablation MC-ICP-MS AB - U-series microanalysis and dating is providing new insights into the timing and rates of formation of different minerals, including opals, authigenic iron oxides, zircons, and pedogenic carbonates, during the late Pleistocene. However, the low natural abundance of U and its decay chain isotopes, makes in situ U-series isotope analysis difficult. Using a state-of-the art excimer laser-ablation system coupled to a second generation MC-ICP-MS (Finnigan Neptune), we demonstrate the ability to measure [U-234/U-238] and [Th-230/ U-238] activity ratios with in-run precision of 1 parts per thousand and 3 parts per thousand, respectively, at a spatial resolution of 90 mm in materials containing 100 - 500 mu g g(-1) U. To verify the accuracy and precision of our approach we have prepared and thoroughly assessed two new 'in-house' reference materials (Al - Ca - Si glass and alpha-Fe2O3) for U-series isotopic composition and micro-scale homogeneity. Together with NIST 610, these reference materials allow us to monitor and correct for Th/U elemental fractionation and to accurately determine Th-230/U isotopic ratios. We show that calibration using silicate glasses imparts a small but significant (similar to 3%) matrix bias for U-series analysis of iron oxides, and highlights the need for matrix matched materials to obtain accurate U-series chronologies by laser-ablation MC-ICP-MS MH - Australia MH - Mexico|Distrito Federal PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Analytical;Spectroscopy U5 - J;Article AV - English IS - 0267-9477 UR - ISI:000232692400011 L2 - PLASMA-MASS SPECTROMETRY; 266 NM; ELEMENTAL FRACTIONATION; MINERAL PHASES; YUCCA MOUNTAIN; TRACE-ELEMENTS; URANIUM; RESOLUTION; CORALS; U-238 SO - Journal of Analytical Atomic Spectrometry 2005 ;20(11):1240-1249 13198 UI - 1057 AU - Bernard O AU - Chachuat B AU - Helias A AU - Le Dantec B AU - Sialve B AU - Steyer JP AU - Lardon L AU - Neveu P AU - Lambert S AU - Gallop J AU - Dixon M AU - Ratini P AU - Quintaba A AU - Frattesi S AU - Lema JM AU - Roca E AU - Ruiz G AU - Rodriguez J AU - Franco A AU - Vanrolleghem P AU - Zaher U AU - De Pauw DJW AU - De Neve K AU - Lievens K AU - Dochain D AU - Schoefs O AU - Fibrianto H AU - Farina R AU - Gonzalez VA AU - Alvarez VG AU - Lemaire P AU - Martinez JA AU - Esandi F AU - Duclaud O AU - Lavigne JF AD - INRIA, COMORE, F-06902 Sophia Antipolis, FranceGEIE, ERCIM, F-06902 Sophia Antipolis, FranceINRA, LBE, F-11100 Narbonne, FranceRutherford Appleton Lab, CCLRC, Didcot OX11 0QX, Oxon, EnglandSPES, I-60044 Fabriano, ItalyUniv Santiago de Compostela, Dept Chem Engn, ETSE, Santiago De Compostela, SpainState Univ Ghent, BIOMATH, B-9000 Ghent, BelgiumAPPLITEK, B-9810 Nazareth, BelgiumUCL, CESAME, B-1348 Louvain, BelgiumENEA, I-40129 Bologna, ItalyUniv Guadalajara, Dept Chem Engn, Guadalajara 44430, Jalisco, MexicoPierre Lemaire, F-06800 Cagnes Sur Mer, FranceAGRALCO SOC COOP, Estella 31200, SpainTequila Sauza SA CV, Tequila Jalisco 46400, MexicoAllied Domeq, Bristol BS13 8AR, Avon, EnglandBernard, O, INRIA, COMORE, BP93, F-06902 Sophia Antipolis, France TI - An integrated system to remote monitor and control anaerobic wastewater treatment plants through the internet AB - The TELEMAC project brings new methodologies from the Information and Science Technologies field to the world of water treatment. TELEMAC offers an advanced remote management system which adapts to most of the anaerobic wastewater treatment plants that do not benefit from a local expert in wastewater treatment. The TELEMAC system takes advantage of new sensors to better monitor the process dynamics and to run automatic controllers that stabilise the treatment plant, meet the depollution requirements and provide a biogas quality suitable for cogeneration. If the automatic system detects a failure which cannot be solved automatically or locally by a technician, then an expert from the TELEMAC Control Centre is contacted via the internet and manages the problem MH - Belgium MH - United Kingdom MH - France MH - Italy MH - Mexico|Jalisco MH - Spain PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 10 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000232146500063 L2 - anaerobic digestion;automation;fault detection and isolation;modelling;remote monitoring;winery;DIGESTION PROCESSES; MODEL SO - Water Science and Technology 2005 ;52(1-2):457-464 13199 UI - 2398 AU - Bernardino-Nicanor A AU - Anon MC AU - Scilingo AA AU - vila-Ortiz G AD - IPN, Excuela Nacl Ciencias Biol, Dept Grad & Invest Alimentos, Mexico City 11340 17, DF, MexicoNatl Univ La Plata, Fac Ciencias Exactas, CIDCA, RA-1900 La Plata, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1900 La Plata, ArgentinaDavila-Ortiz, G, IPN, Excuela Nacl Ciencias Biol, Dept Grad & Invest Alimentos, Prolongac Carpio & Plan Ayala, Mexico City 11340 17, DF, Mexico TI - Functional properties of guava seed glutelins AB - Five guava seed glutelin extracts were obtained with different buffer solutions: Na2B4O7 alone (Glut.Bo) or containing SIDS (Glut.BoSDS), 2-mercaptoethanol (Glut.Bo2-ME), or a combination of both (Glut. BoSDS2-ME) and NaOH (Glut.Na). All borate buffer solutions were at pH 10. The higher yield of glutelins corresponded to the Glut.BoSDS extract (81.9% dry basis) and the lower to Glut.Bo (6.8%). The functional properties of the five guava seed glutelin extracts were determined. Glut.BoSDS, Glut.BoSDS2-ME, and Glut.Na showed high values for several properties, including surface hydrophobicity (7.7, 10.8, and 0.6, respectively), solubility at pH 10 (91.1, 77.9, and 96.7, respectively), water-holding capacity at pH 3.6 (1.7, 2.5, and 2.8, respectively), emulsifying activity index (pH 10; 503.5, 238.2, and 838.0, respectively), and foaming properties (pH 10; V-0 = 0.14, 0.25, and 0.19, respectively; V-max = 6.1, 5.59, and 4.51, respectively; t(1/2) = 266, 255.3, and 94 s, respectively). These results suggest that the denaturing reagent (SDS or NaOH) during extraction conferred on the proteins a structure that facilitated the development of their functional properties MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000228810200052 L2 - guava seed glutelins;functional properties;glutelins;FOAMING PROPERTIES; EMULSIFYING PROPERTIES; SURFACE-PROPERTIES; PROTEIN ISOLATE; SOY GLYCININ; HYDROPHOBICITY; SOLUBILITY; WHEY SO - Journal of Agricultural and Food Chemistry 2005 ;53(9):3613-3617 13200 UI - 116 AU - Bernstein S AU - Gurlebeck K AU - Resendis LF AU - Tovar LM AD - Tech Univ Bergakad Freiberg, Inst F Angew Anal, D-09596 Freiberg, GermanyBauhaus Univ Weimar, Inst Math & Phys, D-99423 Weimar, GermanyUniv Autonoma Metropolitana, Unidad Azcapotzalco, Mexico City 02200, DF, MexicoIPN, Escuela Super Fis & Matemat, Unidad ALM, Mexico City 07300, DF, MexicoBernstein, S, Tech Univ Bergakad Freiberg, Inst F Angew Anal, Pruferstr 9, D-09596 Freiberg, Germany TI - Dirichlet and Hardy spaces of harmonic and monogenic functions AB - In this paper we obtain a characterization of the Dirichlet D-p-spaces of monogenic Clifford algebra valued functions in the unit ball in Rm+1 by the coefficients of a homogeneous series expansion MH - Germany MH - Mexico|Distrito Federal PB - LEMGO: HELDERMANN VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0232-2064 UR - ISI:000235282200006 L2 - holomorphic functions;monogenic functions;function spaces;Dirichlet spaces;Hardy spaces;MULTIPLIERS SO - Zeitschrift fur Analysis und Ihre Anwendungen 2005 ;24(4):763-789 13201 UI - 1712 AU - Berrios EPF AU - Gonzalez JFA AU - Gavino JPA AU - Romano P AU - Capece A AU - Mathis AG AD - Estado Jalisco AC, Ctr Invest & Asistencia Tecnol & Diseno, Guadalajara 44270, Jalisco, MexicoUniv Basilicata, Dipartimento Biol Difesa Biotecnol Agroforestali, Wine Microbiol Lab, I-85100 Potenza, ItalyBerrios, EPF, Estado Jalisco AC, Ctr Invest & Asistencia Tecnol & Diseno, Normalistas 800 Col,Colinas Normal, Guadalajara 44270, Jalisco, Mexico TI - The uses of AFLP for detecting DNA polymorphism, genotype identification and genetic diversity between yeasts isolated from Mexican agave-distilled beverages and from grape musts AB - Aims: The objectives were to determine the variability and to compare the genetic diversity obtained using amplified fragment length polymorphism (AFLP) markers in analyses of wine, tequila, mezcal, sotol and raicilla yeasts. Methods and Results: A molecular characterization of yeasts isolated from Mexican agave musts, has been performed by AFLP marker analysis, using reference wine strains from Italian and South African regions. Conclusions: A direct co-relation between genetic profile, origin and fermentation process of strains was found especially in strains isolated from agave must. In addition, unique molecular markers were obtained for all the strains using six combination primers, confirming the discriminatory power of AFLP markers. Significance and Impact of the Study: This is the first report of molecular characterization between yeasts isolated from different Mexican traditional agave-distilled beverages, which shows high genetic differences with respect to wine strains MH - Italy MH - Mexico|Jalisco PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Biotechnology & Applied Microbiology;Microbiology U5 - J;Article AV - English IS - 0266-8254 UR - ISI:000230574100009 L2 - agave yeasts;amplified fragment length polymorphism;genetic diversity;mezcal;tequila;SACCHAROMYCES-CEREVISIAE; STRAINS; WINE; MARKERS; RFLP SO - Letters in Applied Microbiology 2005 ;41(2):147-152 13202 UI - 983 AU - Betancourt I AU - Davies HA AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, EnglandBetancourt, I, Univ Nacl Autonoma Mexico, Inst Invest Mat, POB 70-360, Mexico City 04510, DF, Mexico TI - Enhanced coercivity in B-rich nanocomposite alpha-Fe/(NdPr)(2)Fe14B/Fe3B hard magnetic alloys AB - The structures and magnetic properties of melt-spun B-rich (10 at. %) and Nb-containing nanocomposite alloys, with compositions based on the formula (Nd0.75Pr0.25)(y)Fe90-y-xNbxB10 (y=8, 10; x=0, 2, 4) have been studied. Considerable enhancement of the intrinsic coercivity, (of 657 kA/m) together with excellent energy density (of 113 kJ/m(3)), were observed for y=8, x=4; while for y=10 and x=2, values of 912 kA/m and 140 kJ/m(3) were attained. Results are interpreted in terms of a grain size refining effect of the Nb addition and to the more complete exchange coupling of the soft grains to the hard phase grains afforded by reduced grain sizes. (C) 2005 American Institute of Physics MH - United Kingdom MH - Mexico|Distrito Federal PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000232557900053 L2 - REMANENCE ENHANCEMENT; PERMANENT-MAGNETS; GRAIN-SIZE; MICROSTRUCTURE; RIBBONS; ND; PHASE; ZR SO - Applied Physics Letters 2005 ;87(16): 13203 UI - 2120 AU - Bette A AD - Univ Sonora, Div Ciencias Exactas & Nat, Dept Matemat, Hermosillo, Sonora, MexicoKTH Syd, Royal Inst Technol, S-15181 Sodertalje, SwedenBette, A, Univ Sonora, Div Ciencias Exactas & Nat, Dept Matemat, Hermosillo, Sonora, Mexico TI - Twistors, special relativity, conformal symmetry and minimal coupling - A review AB - An approach to special relativistic dynamics using the language of spinors and twistors is presented. Exploiting the natural conformally invariant symplectic structure of the twistor space, a model is constructed which describes a relativistic massive, spinning and charged particle, minimally coupled to an external electro-magnetic field. On the two-twistor phase space the relativistic Hamiltonian dynamics is generated by a Poincare scalar function obtained from the classical limit (appropriately defined by us) of the second order, to an external electro-magnetic field minimally coupled Dirac operator. In the so defined relativistic classical limit there are no Grassman variables. Besides, the arising equation that describes dynamics of the relativistic spin differs significantly from the so-called Thomas Bergman Michel Telegdi equation MH - Mexico|Sonora MH - Sweden PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Review AV - English IS - 0219-8878 UR - ISI:000229452900007 L2 - special relativity;relativistic spinning particles;twister theory;conformal symmetry SO - International Journal of Geometric Methods in Modern Physics 2005 ;2(2):265-304 13204 UI - 2391 AU - Beugnon G AU - Lachaud JP AU - Chagne P AD - Univ Toulouse 3, CNRS, UMR 5169, Ctr Rech Cognit Anim, F-31062 Toulouse, FranceEI Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoBeugnon, G, Univ Toulouse 3, CNRS, UMR 5169, Ctr Rech Cognit Anim, F-31062 Toulouse, France TI - Use of long-term stored vector information in the neotropical ant Gigantiops destructor AB - We investigated how the formicine ant Gigantiops destructor can use vector information to navigate within the cluttered environment of the rain forest. Displaced foragers use skylight information to move in the theoretical feeder-to-nest direction, whether they are prevented from updating their path-integrator during foraging or captured at the departure from their nest, i.e. with a current accumulator state very close to zero. Only ants that have collected food are able to download a long-term stored reference vector pointing in the nest direction, irrespective of the current accumulator state of their path-integrator stored in a working memory and independent of familiar landmarks. Depending on the release sites, ants that became lost at a maximum distance of 50 cm could still hit and recognize their familiar route, or they engaged in a systematic search for it centered on the release sites. In contrast to Cataglyphis desert ants, Gigantiops ants do not rely primarily on the current accumulator state of their egocentric path integrator. Such a long-term vector-based navigation primed by food capture is well adapted for a tropical ant foraging during periods spanning several hours. This could prevent the numerous cumulative errors in the evaluation of the angles steered that might result from a continuously running path-integrator operating during complex foraging patterns performed at ground or arboreal levels and during passive displacement in response to heavy rain MH - France MH - Mexico|Chiapas PB - NEW YORK: SPRINGER/PLENUM PUBLISHERS RP - NOT IN FILE U3 - TC 4 U4 - Entomology U5 - J;Article AV - English IS - 0892-7553 UR - ISI:000228854200011 L2 - vector navigation;long-term reference vector memory;Neotropical ants, Gigantiops destructor;DESERT ANTS; PATH-INTEGRATION; CATAGLYPHIS-FORTIS; NAVIGATION; FORMICIDAE; INSECTS; ORIENTATION; HYMENOPTERA; CALIBRATION; PONERINAE SO - Journal of Insect Behavior 2005 ;18(3):415-432 13205 UI - 640 AU - Bhambhani N AU - Lin RY AU - Lorenzo M AU - Lascher S AU - Bacorro E AU - Teitel AD AD - Cabrini Hosp, New York, NY, USASt Vincents Hosp, New York, NY, USAJersey City Med Ctr, Jersey City, Jalisco, Mexico TI - Hospitalization of RA patients with fever in NY state: The pre and post TNF-inhibitor experience MH - Mexico|Jalisco MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Rheumatology U5 - J;Meeting Abstract AV - English IS - 0004-3591 UR - ISI:000232207801356 SO - Arthritis and Rheumatism 2005 ;52(9):S330-S330 13206 UI - 1382 AU - Bhardwaj RK AU - Herrera-Ruiz D AU - Sinko PJ AU - Gudmundsson OS AU - Knipp G AD - Rutgers State Univ, Ernest Mario Sch Pharm, Dept Pharmaceut, Piscataway, NJ 08854, USAUniv Autonoma Estado Morelos, Fac Farm, Cuernavaca, Morelos, MexicoBristol Myers Squibb Co, Inst Res, Discovery Pharmaceut, Princeton, NJ, USAKnipp, G, Rutgers State Univ, Ernest Mario Sch Pharm, Dept Pharmaceut, 160 Frelinghuysen Rd, Piscataway, NJ 08854 USA TI - Delineation of human peptide transporter 1 (hPepT1)-mediated uptake and transport of substrates with varying transporter affinities utilizing stably transfected hPepT1/Madin-Darby canine kidney clones and caco-2 cells AB - In the present investigation, the uptake and transport kinetics of valacyclovir (VACV), 5-aminolevulinic acid (5-ALA), and benzylpenicillin ( BENZ) were studied in stably transfected Madin-Darby canine kidney (MDCK)/human peptide transporter 1 (hPepT1)-V5&His clonal cell lines expressing varying levels of epitope-tagged hPepT1 protein ( low, medium, and high expression) and in Caco-2 cells to delineate hPepT1-mediated transport kinetics. These compounds were selected due to the fact that they are known PepT1 substrates, yet also have affinity for other transporters. Caco-2 cells, traditionally used for studying peptide-based drug transport, were included for comparison purposes. The time, pH, sodium, and concentration dependence of cellular uptake and permeability were measured using mock, clonal hPepT1-MDCK, and Caco-2 cells. A pH-dependent effect was observed in the hPepT1-expressing clones and Caco-2 cells, with an increase of 1.96-, 1.84-, and 2.05-fold for VACV, 5-ALA, and BENZ uptake, respectively, at pH 6 versus 7.4 in the high-expressing hPepT1 cells. BENZ uptake was significantly decreased in Caco-2 and MDCK cells in Na+-depleted buffer, whereas VACV uptake only decreased in Caco-2 cells. Concentration-dependent uptake studies in the mock-corrected hPepT1-MDCK and Caco-2 cells demonstrated hPepT1 affinity ranking of VACV > 5-ALA > BENZ. The apical-to-basal apparent permeability coefficient (P-app) values of VACV, 5-ALA, and BENZ in mock-corrected hPepT1-MDCK cells showed solely hPepT1-mediated transport in contrast to Caco-2 cells. Lower K m values and higher P-app in Caco-2 cells compared with hPepT1-MDCK cells suggested the involvement of multiple transporters in Caco-2 cells. Thus, hPepT1-MDCK cells corrected for endogenous transporter expression may be a more appropriate model for screening compounds for their affinity to hPepT1 MH - Mexico|Morelos MH - USA PB - BETHESDA: AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS RP - NOT IN FILE U3 - TC 4 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0022-3565 UR - ISI:000231362400019 L2 - DELTA-AMINOLEVULINIC-ACID; RAT SMALL-INTESTINE; PEPTIDE TRANSPORTER; DRUG ABSORPTION; 5-AMINOLEVULINIC ACID; MDCK CELLS; EXPRESSION; BENZYLPENICILLIN; VALACYCLOVIR; PERMEABILITY SO - Journal of Pharmacology and Experimental Therapeutics 2005 ;314(3):1093-1100 13207 UI - 801 AU - Bialek R AU - Konrad F AU - Kern J AU - Aepinus C AU - Cecenas L AU - Gonzalez GM AU - Just-Nubling G AU - Willinger B AU - Presterl E AU - Lass-Florl C AU - Rickerts V AD - Univ Tubingen Hosp, Inst Trop Med, D-72074 Tubingen, GermanyUniv Hosp Rostock, Inst Med Microbiol Virol & Hyg, D-18057 Rostock, GermanyUniv Autonoma Nuevo Leon, Dept Pathol, Monterrey 64460, NL, MexicoUniv Autonoma Nuevo Leon, Dept Microbiol, Monterrey, NL, MexicoUniv Hosp, Med Klin 3, D-60590 Frankfurt, GermanyMed Univ Vienna, Inst Hyg & Med Microbiol, A-1090 Vienna, AustriaDept Med, Div Infect Dis & Hosp Epidemiol, CH-8091 Zurich, SwitzerlandInnsbruck Univ, Dept Hyg & Social Med, A-6010 Innsbruck, AustriaBialek, R, Univ Tubingen Hosp, Inst Trop Med, Keplerstr 15, D-72074 Tubingen, Germany TI - PCR based identification and discrimination of agents of mucormycosis and aspergillosis in paraffin wax embedded tissue AB - Background: Invasive fungal infections are often diagnosed by histopathology without identification of the causative fungi, which show significantly different antifungal susceptibilities. Aims: To establish and evaluate a system of two seminested polymerase chain reaction (PCR) assays to identify and discriminate between agents of aspergillosis and mucormycosis in paraffin wax embedded tissue samples. Methods: DNA of 52 blinded samples from five different centres was extracted and used as a template in two PCR assays targeting the mitochondrial aspergillosis DNA and the 18S ribosomal DNA of zygomycetes. Results: Specific fungal DNA was identified in 27 of 44 samples in accordance with a histopathological diagnosis of zygomycosis or aspergillosis, respectively. Aspergillus fumigatus DNA was amplified from one specimen of zygomycosis ( diagnosed by histopathology). In four of 16 PCR negative samples no human DNA was amplified, possibly as a result of the destruction of DNA before paraffin wax embedding. In addition, eight samples from clinically suspected fungal infections (without histopathological proof) were examined. The two PCR assays detected a concomitant infection with Absidia corymbifera and A fumigatus in one, and infections with Rhizopus arrhizus and A fumigatus in another two cases. Conclusions: The two seminested PCR assays described here can support a histopathological diagnosis of mucormycosis or aspergillosis, and can identify the infective agent, thereby optimising antifungal treatment MH - Austria MH - Germany MH - Mexico|Nuevo Leon MH - Switzerland PB - LONDON: B M J PUBLISHING GROUP RP - NOT IN FILE U3 - TC 10 U4 - Pathology U5 - J;Article AV - English IS - 0021-9746 UR - ISI:000232890000012 L2 - REAL-TIME PCR; CELL TRANSPLANT RECIPIENTS; AMPHOTERICIN-B; FUNGAL-INFECTIONS; FILAMENTOUS FUNGI; MOLECULAR PROBES; MOLD INFECTIONS; DNA; ZYGOMYCOSIS; POSACONAZOLE SO - Journal of Clinical Pathology 2005 ;58(11):1180-1184 13208 UI - 1097 AU - Bialek R AU - Gonzalez GM AU - Begerow D AU - Zelck UE AD - Univ Klinikum Tubingen, Inst Tropenmed, D-72074 Tubingen, GermanyUniv Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Nuevo Leon, MexicoUniv Tubingen, Inst Biol 1, D-7400 Tubingen, GermanyBialek, R, Univ Klinikum Tubingen, Inst Tropenmed, Keplerstr 15, D-72074 Tubingen, Germany TI - Coccidioidomycosis and blastomycosis: Advances in molecular diagnosis AB - Clinical isolates of Coccidioides spp. and Blastomyces dermatitidis can be identified by chemilurninescent DNA probes and PCR assays targeting multicopy genes. In fixed tissue samples, cells of the two fungi are specified by in situ hybridization and PCR assays targeting 18S rDNA but sequencing of the products is mandatory. Nested PCR assays targeting genes encoding species- or genus-specific proteins like proline rich antigen of Coccidioides spp. and R dermatitidis adhesin facilitate amplification of specific DNA from fixed tissue samples. The value of DNA amplification from native specimens of suspected cases of coccidioidomycosis or blastomycosis still needs to be determined. (c) 2005 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Nuevo Leon PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0928-8244 UR - ISI:000232192600002 L2 - Coccidioidomycosis;Blastomycosis;PCR assays;antigen2/proline rich antigen;Blastomyces adhesin;NESTED PCR ASSAYS; CRYPTOCOCCUS-NEOFORMANS; HISTOPLASMA-CAPSULATUM; CULTURE IDENTIFICATION; PRACTICE GUIDELINES; CLINICAL SPECIMENS; FUNGAL-INFECTIONS; IMMITIS; DNA; DERMATITIDIS SO - Fems Immunology and Medical Microbiology 2005 ;45(3):355-360 13209 UI - 15 AU - Bialkowski J AU - Zabal C AU - Szkutnik M AU - Montes JAG AU - Kusa J AU - Baranowski J AU - Zembala M AD - Silesian Ctr Heart Dis, Zabrze, PolandNatl Inst Cardiol, Hemodynam Dept, Mexico City, DF, Mexico TI - Percutaneous inteventional closure of large pulmonary arteriovenous fistulae with the Amplatzer Duct Occluder MH - Mexico|Distrito Federal MH - Poland PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Cardiac & Cardiovascular Systems U5 - J;Meeting Abstract AV - English IS - 0195-668X UR - ISI:000233987100328 SO - European Heart Journal 2005 ;26():83-84 13210 UI - 1848 AU - Bialkowski J AU - Zabal C AU - Szkutnik M AU - Montes JAG AU - Kusa J AU - Zembala M AD - Silesian Ctr Heart Dis, Dept Congenital Heart Dis & Pediat Cardiol, Zabrze, PolandSilesian Ctr Heart Dis, Dept Transplantol & Cardiac Surg, Zabrze, PolandInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoBialkowski, J, Silesian Ctr Heart Dis, Dept Congenital Heart Dis & Pediat Cardiol, Zabrze, Poland TI - Percutaneous interventional closure of large pulmonary arteriovenous fistulas with the Amplatzer duct occluder AB - Large pulmonary arteriovenous fistulas (PAVFs) are difficult for transcatheter treatment. This report presents 5 patients aged 3 to 73 years with large PAVFs who underwent successful transcatheter closure with the Amplatzer duct occluder (ADO), designed for the occlusion of patent duct arteriosus. The procedures were performed without complications and provided sustained improvement in arterial oxygen saturation and exercise tolerance on follow-up examination in all patients. The transcatheter closure of large PAVFs with the ADO is effective and can eliminate the need for surgical intervention. The newly designed Amplatzer vascular plug is undergoing clinical trials. (c) 2005 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Poland PB - NEW YORK: EXCERPTA MEDICA INC RP - NOT IN FILE U3 - TC 9 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0002-9149 UR - ISI:000230233900029 L2 - TRANSCATHETER OCCLUSION; MALFORMATIONS; EMBOLOTHERAPY; EMBOLIZATION; DIAGNOSIS SO - American Journal of Cardiology 2005 ;96(1):127-129 13211 UI - 2529 AU - Billings DL AU - Benson J AD - Ipas Mexico, Mexico City 06140, DF, MexicoIpas, Res & Evaluat, Chapel Hill, NC, USABillings, DL, Ipas Mexico, Pachuca 92,Colonia Condesa, Mexico City 06140, DF, Mexico TI - Postabortion care in Latin America: policy and service recommendations from a decade of operations research AB - Unsafe abortion contributes significantly to maternal mortality and morbidity in Latin America. Postabortion care (PAC) using preferred technologies and a woman-centred approach to treat the complications of unsafe abortion can save women's lives and improve their reproductive health, as well as reduce costs to health systems. This article reviews results from 10 major PAC operations research projects conducted in public sector hospitals in seven Latin American countries, completed and published between 1991 and 2002. The studies show that following relatively modest interventions, the majority of eligible patients were being treated with manual vacuum aspiration (MVA), a method preferred for safety and other reasons over the method conventionally used in the region, sharp curettage (SC). A number of studies showed improvements in contraceptive counselling and services when these were integrated with clinical treatment of abortion complications, resulting in substantial increases in contraceptive acceptance. Finally, data from several studies showed that, in most settings, reorganizing services by moving treatment out of the operating theatre and reclassifying treatment as an ambulatory care procedure substantially reduced the resources used for PAC, as well as the cost and average length of women's stay in the hospital. These studies suggest that comprehensive PAC can and should be available to all women in Latin America. Such efforts should be coupled with work to improve primary prevention, including better contraceptive services to prevent unwanted pregnancy and safe, legal abortion services to reduce the number of clandestine and unsafe abortions MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 9 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Article AV - English IS - 0268-1080 UR - ISI:000228636400003 L2 - postabortion care;unsafe abortion;manual vacuum aspiration;INCOMPLETE ABORTION; PREGNANCY; MEXICO; KENYA SO - Health Policy and Planning 2005 ;20(3):158-166 13212 UI - 3041 AU - Bilu YF AU - Luca F AD - Univ Bordeaux 1, F-33405 Talence, FranceUNAM, Math Inst, Morelia 58089, Michoacan, MexicoBilu, YF, Univ Bordeaux 1, A2X,351 Cours Liberat, F-33405 Talence, France TI - Divisibility of class numbers: enumerative approach MH - France MH - Mexico|Michoacan PB - BERLIN: WALTER DE GRUYTER & CO RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0075-4102 UR - ISI:000227142500003 L2 - CUBIC CYCLIC FIELDS; IDEAL CLASS-GROUPS; QUADRATIC FIELDS; HEURISTICS; REGULATOR SO - Journal fur Die Reine und Angewandte Mathematik 2005 ;578():79-91 13213 UI - 3482 AU - Binder LI AU - Guillozet-Bongaarts AL AU - Garcia-Sierra F AU - Berry RW AD - Northwestern Univ, Feinburg Sch Med, Dept Cell & Mol Biol, Chicago, IL 60611, USANorthwestern Univ, Feinburg Sch Med, Cognit Neurol & Alzheimers Dis Ctr, Chicago, IL 60611, USANatl Polytech Inst, Ctr Res & Adv Studies, Dept Cell Biol, Mexico City 07360, DF, MexicoBinder, LI, Northwestern Univ, Feinburg Sch Med, Dept Cell & Mol Biol, 303 E Chicago Ave, Chicago, IL 60611 USA TI - Tau, tangles, and Alzheimer's disease AB - Neurofibrillary tangles (NFT) are comprised of the microtubule-associated protein tau, in the form of filamentous aggregates. In addition to the well-known changes in phosphorylation state, tau undergoes multiple truncations and shifts in conformation as it transforms from an unfolded monomer to the structured polymer characteristic of NFT. Truncations at both the amino- and carboxy-termini directly influence the conformation into which the molecule folds, and hence the ability of tau to polymerize into fibrils. Certain of these truncations may be due to cleavage by caspases as part of the apoptotic cascade. In this review, we discuss evidence that strongly suggests that these truncations occur in an orderly pattern and directly influence the ability of tau to polymerize into filaments. (C) 2004 Published by Elsevier B.V MH - USA MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 31 U4 - Biochemistry & Molecular Biology;Biophysics U5 - J;Review AV - English IS - 0925-4439 UR - ISI:000226120400013 L2 - neurofibrillary tangle;tau;Alzheimer's disease;PAIRED HELICAL FILAMENTS; MILD COGNITIVE IMPAIRMENT; NEUROFIBRILLARY TANGLES; PROTEIN-TAU; NEURODEGENERATIVE DISEASES; CASPASE-CLEAVAGE; NEURONAL DEATH; CELL-DEATH; IN-VITRO; MICROTUBULE SO - Biochimica et Biophysica Acta-Molecular Basis of Disease 2005 ;1739(2-3):216-223 13214 UI - 1043 AU - Binette L AU - Magris G AU - Krongold Y AU - Morisset C AU - Corzo SH AU - de Diego JA AU - Mutschke H AU - Andersen AC AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoCIDA, Merida 5101A, VenezuelaUniv Sternwarte, AIU, D-07745 Jena, GermanyInst Astrophys, D-07745 Jena, GermanyDark Cosmol Ctr, DK-2100 Copenhagen, DenmarkBinette, L, Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico TI - Nanodiamond dust and the far-ultraviolet quasar break AB - We explore the possibility that the steepening observed shortward of 1000 angstrom in the energy distribution of quasars may result from absorption by dust, being either intrinsic to the quasar environment or intergalactic. We find that a dust extinction curve consisting of nanodiamonds, composed of terrestrial cubic diamonds or with surface impurities as found in carbonaceous chondrite meteorites, such as Allende, is successful in reproducing the sharp break observed. The intergalactic dust model is partially successful in explaining the shape of the composite energy distribution but must be discarded in the end, as the amount of crystalline dust required is unreasonable and would imply an improbable fine-tuning among the dust formation processes. The alternative intrinsic dust model requires a mixture of both cubic diamonds and Allende nanodiamonds and provides a better fit of the UV break. The gas column densities implied are of the order 10(20) cm(-2), assuming solar metallicity for carbon and full depletion of carbon into dust. The absorption only occurs in the ultraviolet and is totally negligible in the visible. The minimum dust mass required is of the order similar to 0.003r(pc)(2) M , where r(pc) is the distance in parsecs between the dust screen and the continuum source. The intrinsic dust model reproduces the flux rise observed around 660 8 in key quasar spectra quite well. We present indirect evidence of a shallow continuum break near 670 angstrom (18.5 eV), which would be intrinsic to the quasar continuum MH - Denmark MH - Germany MH - Mexico|Distrito Federal MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 6 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000232365300001 L2 - galaxies : active;intergalactic medium;large-scale structure of universe;radiative transfer;ultraviolet : general;ACTIVE GALACTIC NUCLEI; INTERSTELLAR DIAMONDS; CONTINUUM; HOT; EMISSION; CONSTRAINTS; METEORITES; SUPERNOVAE; EVOLUTION; SPECTRUM SO - Astrophysical Journal 2005 ;631(2):661-677 13215 UI - 2273 AU - Biondi F AU - Hartsough PC AU - Estrada IG AD - Univ Nevada, Dept Geog, DendroLab, Reno, NV 89557, USAUniv Nevada, Hydrol Sci Grad Program, Reno, NV 89557, USAUniv Colima, Colima 28045, MexicoBiondi, F, Univ Nevada, Dept Geog, DendroLab, MS 154, Reno, NV 89557 USA TI - Daily weather and tree growth at the tropical treeline of North America AB - We present here the 2001-2004 results of observational field studies aimed at quantifying tropical timberline climate and radial increment of Pinus hartwegii Lindl. trees on Nevado de Colima, in the middle of the North American Monsoon region. An automated weather station was installed at 3760 m a.s.l., 19&DEG; 34.778'N latitude, 103&DEG; 37.180'W longitude, within a forest where multi-century tree-ring records had been previously developed. At the same time, automated electronic sensors for recording tree growth at 30-min intervals were set up at two sites within a 1-km radius from the weather station. Meteorological observations recorded every 30 min were summarized on a daily basis. Time-series patterns are reported for atmospheric pressure, precipitation, incoming solar radiation, air and soil temperature, relative humidity, soil moisture, and wind speed and direction. Of particular interest is the sudden decrease in air temperature after the onset of the monsoon season, which determines very high relative humidity over the summer and results in air temperature having a spring maximum. Despite sub-freezing air temperatures in most months, soil temperatures never drop below 0&DEG; C. Dendrometer data show that the timberline growing season begins in March-April as temperature increases, then radial growth continues throughout the cool-wet summer monsoon, and ends in October-November. As an unexpected result, it was also possible to measure the progressive decline of Pinus hartwegii stem increment in response to an outbreak of roundheaded pine beetle (Dendroctonus adjunctus Blandford), which ultimately killed most trees at one of our two experimental sites MH - Mexico|Colima MH - USA PB - BOULDER: INST ARCTIC ALPINE RES RP - NOT IN FILE U3 - TC 5 U4 - Environmental Sciences;Geography, Physical U5 - J;Article AV - English IS - 1523-0430 UR - ISI:000229051500003 L2 - HIGH-ALTITUDE; PRECIPITATION; MEXICO; VARIABILITY; INCREMENT; MONSOON SO - Arctic Antarctic and Alpine Research 2005 ;37(1):16-24 13216 UI - 2857 AU - Birkhead TR AU - Pellatt EJ AU - Brekke P AU - Yeates R AU - Castillo-Juarez H AD - Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandUniv Autonoma Metropolitana Xochimilco, Mexico City 04960, DF, MexicoBirkhead, TR, Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England TI - Genetic effects on sperm design in the zebra finch AB - Sperm design and function are important determinants of male reproductive success and are expected to be under strong selection(1,2). The way that spermatozoa phenotypes evolve is poorly understood, because there have been few studies of the quantitative genetics of sperm(3-5). Here we show, in the zebra finch Taeniopygia guttata, an extraordinary degree of inter-male variation in sperm design that is independent of sperm swimming velocity. A quantitative genetics study using data from over 900 zebra finches in a complex breeding experiment showed that sperm head, mid-piece and flagellum length are heritable, that negative genetic correlations exist between sperm traits, and that significant indirect ( maternal) genetic effects exist. Selection on the zebra finch sperm phenotype may be low because sperm competition is infrequent in this species(6), and this, in combination with negative genetic correlations and maternal genetic effects, may account for the variation in sperm phenotype between males. These results have important implications for the evolution of sperm in other taxa MH - United Kingdom MH - Mexico|Distrito Federal PB - LONDON: NATURE PUBLISHING GROUP RP - NOT IN FILE U3 - TC 25 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0028-0836 UR - ISI:000227715100052 L2 - TAENIOPYGIA-GUTTATA; EJACULATE QUALITY; DOMESTIC-FOWL; SELECTION; COMPETITION; EVOLUTION; POPULATION; DETERMINES; MOBILITY; LENGTH SO - Nature 2005 ;434(7031):383-387 13217 UI - 3260 AU - Birkner M AU - Lopez-Mimbela JA AU - Wakolbinger A AD - JW Goethe Univ, FB Math, D-60054 Frankfurt, GermanyWeierstrass Inst Appl Anal & Stochast, D-10117 Berlin, GermanyCtr Invest Matemat, Guanajuato 36000, MexicoUniv Frankfurt, FB Math, D-60054 Frankfurt, GermanyWakolbinger, A, JW Goethe Univ, FB Math, D-60054 Frankfurt, Germany TI - Comparison results and steady states for the Fujita equation with fractional Laplacian AB - We study a semilinear PDE generalizing the Fujita equation whose evolution operator is the sum of a fractional power of the Laplacian and a convex non-linearity. Using the Feynman-Kac representation we prove criteria for asymptotic extinction versus finite time blow up of positive solutions based on comparison with global solutions. For a critical power non-linearity we obtain a two-parameter family of radially symmetric stationary solutions. By extending the method of moving planes to fractional powers of the Laplacian we prove that all positive steady states of the corresponding equation in a finite ball are radially symmetric. (C) 2004 Elsevier SAS. All rights reserved MH - Germany MH - Mexico|Guanajuato PB - PARIS: GAUTHIER-VILLARS/EDITIONS ELSEVIER RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0294-1449 UR - ISI:000226921500005 L2 - blow-up and extinction of solutions of semilinear PDEs;comparison;Feynman-Kac representation;symmetry of solutions;symmetric stable processes;method of moving planes;ELLIPTIC-EQUATIONS; POSITIVE SOLUTIONS; CAUCHY-PROBLEM SO - Annales de l Institut Henri Poincare-Analyse Non Lineaire 2005 ;22(1):83-97 13218 UI - 178 AU - Biswas AK AU - Jayatilaka R AU - Tortajada C AD - Third World Ctr Water Management, Atizapan 52958, Estado Mexico, MexicoUniv Colombo, Dept Sociol, Colombo, Sri LankaBiswas, AK, Third World Ctr Water Management, Ave Manantial Oriente 27, Atizapan 52958, Estado Mexico, Mexico TI - Social perceptions of the impacts of Colombo water supply projects AB - The complexity of development activities, in which the interactions between various forces often mean that outcomes are unpredictable and unanticipated highlights the importance of objective and comprehensive evaluations. In the specific case of the evaluation of towns east and south of Colombo water supply projects, the findings have major implications for the implementation of the Millennium Development Goals, if the water-related objectives are to be fulfilled. The study found that 30% of the households of these towns that are receiving clean, piped water are not using it for drinking. Instead, they are continuing to drink contaminated well water. Whereas it is considered that the main beneficiaries of water supply projects have been women and people who are sick, elderly, or disabled, the general perception is that the health conditions of the families have not improved with the provision of clean water (in fact, many claim that their health conditions have deteriorated). In spite of the higher cost of the supplied water, people are willing to pay for it as long as the supply is reliable MH - Mexico|Estado De Mexico MH - Sri Lanka PB - STOCKHOLM: ROYAL SWEDISH ACAD SCIENCES RP - NOT IN FILE U3 - TC 3 U4 - Engineering, Environmental;Environmental Sciences U5 - J;Article AV - English IS - 0044-7447 UR - ISI:000234658200011 SO - Ambio 2005 ;34(8):639-644 13219 UI - 2630 AU - Bjerke JW AU - Sipman HJM AU - Perez RE AD - Univ Tromso, Fac Sci, Dept Biol, N-9037 Tromso, NorwayFree Univ Berlin, ZE Bot Garten & Bot Museum, D-14191 Berlin, GermanyUNAM, CRIM, Cuernavaca 62210, Morelos, MexicoBjerke, JW, Univ Tromso, Fac Sci, Dept Biol, N-9037 Tromso, Norway TI - A new subspecies of Menegazzia neotropica (Parmeliaceae, Ascomycota) from Central America AB - Based on specimens collected by the second and third authors, the new subspecies Menegazzia neotropica ssp. rotundicarpa is described with a type specimen from Costa Rica. It differs from ssp. neotropica by the rounded, only slightly striate apothecia, the colour of the apothecial margins and the number of perforations. The new subspecies is also known from Venezuela and Mexico. It grows as an epiphyte in the subparamo zone MH - Germany MH - Mexico|Morelos MH - Norway PB - ITHACA: MYCOTAXON LTD RP - NOT IN FILE U3 - TC 2 U4 - Mycology U5 - J;Article AV - English IS - 0093-4666 UR - ISI:000228066300045 L2 - lichens;Neotropics;infraspecific taxon;new records;Tapanti;CHROMATOGRAPHIC METHOD; IDENTIFICATION SO - Mycotaxon 2005 ;91():419-422 13220 UI - 1919 AU - Bladt M AU - Sorensen M AD - Univ Copenhagen, Dept Appl Math & Stat, DK-2100 Copenhagen, DenmarkUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoSorensen, M, Univ Copenhagen, Dept Appl Math & Stat, Univ Pk 5, DK-2100 Copenhagen, Denmark TI - Statistical inference or discretely observed Markov bump processes AB - Likelihood inference for discretely observed Markov jump processes with finite state space is investigated. The existence and uniqueness of the maximum likelihood estimator of the intensity matrix are investigated. This topic is closely related to the imbedding problem for Markov chains. It is demonstrated that the maximum likelihood estimator can be found either by the EM algorithm or by a Markov chain Monte Carlo procedure. When the maximum likelihood estimator does not exist, an estimator can be obtained by using a penalized likelihood function or by the Markov chain Monte Carlo procedure with a suitable prior. The methodology and its implementation are illustrated by examples and simulation studies MH - Denmark MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 9 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1369-7412 UR - ISI:000229902600005 L2 - EM algorithm;imbedding problem;likelihood inference;Markov chain Monte Carlo methods;MAXIMUM-LIKELIHOOD-ESTIMATION; EM ALGORITHM; LOGARITHM; SEMIGROUPS; DIFFUSIONS; UNIQUENESS; MATRIX SO - Journal of the Royal Statistical Society Series B-Statistical Methodology 2005 ;67():395-410 13221 UI - 1391 AU - Blake CR AU - Cervantes-Castaneda RA AU - ias-Rodriguez Y AU - Anzoulatous G AU - Anderson R AU - Chayet AS AD - Codet Aris Vis Inst, Tijuana 22032, BC, MexicoUniv Illinois, Chicago, IL, USAHosp San Jose TEC Monterrey, Monterrey, MexicoChayet, AS, Codet Aris Vis Inst, Padre Kino 10159, Tijuana 22032, BC, Mexico TI - Comparison of postoperative pain in patients following photorefractive keratectomy versus advanced surface ablation AB - Purpose: To compare postoperative pain associated with advanced surface ablation versus traditional photorefractive keratectomy (PRK). Setting: Codet-Aris Vision Institute, Tijuana, Mexico. Methods: This prospective double-masked randomized study included 56 eyes of 28 myopic patients who received traditional PRK in 1 eye and advanced surface ablation in the contralateral eye. For advanced surface ablation, removal of corneal epithelium was performed by incubating the cornea with 18% ethanol. Subsequently, the epithelium was removed by a surgical microsponge. For eyes treated by PRK, mechanical debridement of corneal epithelium was performed with a surgical blade. Excimer laser corneal ablation was performed using the Nidek EC-5000 excimer laser in all eyes. On postoperative days 1 and 3, patients were instructed to rate their pain via 3 pain measuring tools: (1) a global subjective rating; (2) a 100 mm visual analog scale (VAS); and (3) an 11-point numerical rating scale. Results: All 28 patients completed postoperative questionnaires on day 1 and day 3. On postoperative day 1, all reported pain in both eyes. Using the global assessment rating, patients reported statistically significant more pain in eyes treated by advanced surface ablation (P =.0037; confidence interval [CI], 59%-92%). Furthermore, based on the 11-point numerical rating scale, mean pain scores were significantly higher in the advanced surface ablation treated eyes (P =.0121), while the VAS mean pain scores were marginally significantly higher (P =.0822). On postoperative day 3, 23 patients reported the presence of some pain, at least in 1 eye. Using the global assessment rating, 70% of the those who had pain reported more pain in the advanced surface ablation-treated eye (advanced surface ablation 16/23 versus PRK 7/23) (P =.0931; 95% Cl, 47%-87%). In addition, on postoperative day 3, advanced surface ablation-treated eyes demonstrated slightly higher mean pain scores based on the 11-point numerical rating scale and on the VAS; however, mean differences were not statistically significant (P =.3494 and P =.3337, respectively). Conclusions: Advanced surface ablation was associated with statistically significantly more postoperative pain than PRK on postoperative day 1. A greater percentage of patients reported more pain in the advanced surface ablation-treated eyes on day 3. Refractive surgeons should consider the postoperative pain associated with advanced surface ablation when deciding on the type of epithelial debridement for their patients MH - Mexico|Baja California MH - Mexico|Nuevo Leon MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 5 U4 - Ophthalmology;Surgery U5 - J;Article AV - English IS - 0886-3350 UR - ISI:000231339700025 L2 - ASSISTED SUBEPITHELIAL KERATECTOMY; VISUAL ANALOG SCALE; EPITHELIAL REMOVAL; MECHANICAL DEBRIDEMENT; CORNEAL EPITHELIUM; 2-PERCENT GEL; LASER; ALCOHOL; MYOPIA; ETHANOL SO - Journal of Cataract and Refractive Surgery 2005 ;31(7):1314-1319 13222 UI - 3011 AU - Blanco-Leczano L AU - Rocha-Arrieta LL AU - varez-Gonzalez L AU - Martinez-Marti L AU - Pavon-Fuentes N AU - Gonzalez-Fraguela ME AU - Bauza-Calderin Y AU - de Peralta YCG AD - CIREN, Dept Neurofisiol Expt, Lab Biomodelos, Havana, CubaCIREN, Clin Trastornos Movimiento, Havana, CubaCIREN, Lab Neuromorfol, Havana, CubaCIREN, Dept Inmunoquim, Havana, CubaCINVESTAV, Mexico City 14000, DF, MexicoBlanco-Leczano, L, CIREN, Dept Neurofisiol Expt, Lab Biomodelos, Ave 25,15805,E-158 & 160 Playa, Havana, Cuba TI - The effects of lesions in the compact part of the substantia nigra on glutamate and GABA release in the pedunculopontine nucleus AB - Introduction. The pedunculopontine nucleus (PPN), co-localized with the mesencephalic locomotor region, has been proposed as a key structure in the physiopathology of Parkinson's disease. Objectives. The goal of the present study was to assess if the aminoacid neurotransmitter release in the PPN is modified by the degeneration of dopaminergic cells, from substantia nigra pars compacta in 6-hydroxidopamine (6-OHDA)-lesioned rats. In addition, it was studied the aminoacid neurotransmitter release in the PPN of rats with lesion of the subthalamic nucleus by quinolinic acid (QUIN) (100 nmol) intracerebral injection. Materials and methods. Rats were assigned to five groups: untreated rats (1) (n = 13), 6-OHDA lesion (II) (n = 11), 6-OHDA + QUIN lesion (III) (n = 9), sham-operated (IV) (n = 10), QUIN, STN (V) lesioned (n = 9). The extracellular concentrations of glutamic acid (GLU) and gamma-aminobutyric acid (GABA) were determined by brain microdialysis and high performance liquid chromatography (HPLC). Results. GLU released in PPNfrom 6-OHDA lesioned rats (group 11), was significantly increased in comparison with the others groups (F(4. 47) = 18.21, p < 0.001). GABA released shows significant differences between experimental groups (F(4,45) = 12.75, p < 0.001). It was detected a higher valour (p < 0.05) in-group H. The groups III and IV exhibited intermeddle valour (p < 0.001) and groups I and IV (p < 0.001) showed the lower GABA extracellular concentrations. The infusion of artificial cerebrospinal fluid with higher potassium (100 mmol) induced an increase in the GLU and GABA released in all groups, which confirm the neuronal origin of the extracellular content. Conclusion. These results are in agreement with the current model of basal ganglia functioning and suggest the role of STN-PPN projection in the physiopathology of Parkinson's disease MH - Cuba MH - Mexico|Distrito Federal PB - BARCELONA: REVISTA DE NEUROLOGIA RP - NOT IN FILE U3 - TC 1 U4 - Clinical Neurology U5 - J;Article AV - Spanish IS - 0210-0010 UR - ISI:000227136900004 L2 - microdialysis technique;Parkinsonism;PPN;STN;6-OHDA;DUAL PROBE MICRODIALYSIS; SUBTHALAMIC NUCLEUS; TEGMENTAL NUCLEUS; MESOPONTINE TEGMENTUM; PARKINSONS-DISEASE; DOPAMINE RELEASE; NEUROTRANSMITTER RELEASE; MOVEMENT-DISORDERS; RAT; NEURONS SO - Revista de Neurologia 2005 ;40(1):23-29 13223 UI - 1928 AU - Blanco AM AU - Masini G AU - Petracci N AU - Bandoni JA AD - Univ Nacl Sur, CONICET, Planta Piloto Ingn Quim, PLAPIQUI, RA-8000 Bahia Blanca, Buenos Aires, ArgentinaUniv Nacl Comahue Buenos Aires, Dept Mech Engn, Fac Engn, Mexico City 14000, DF, MexicoBandoni, JA, Univ Nacl Sur, CONICET, Planta Piloto Ingn Quim, PLAPIQUI, Camino Carrindanga,Km 7, RA-8000 Bahia Blanca, Buenos Aires, Argentina TI - Operations management of a packaging plant in the fruit industry AB - The production of fresh fruit (apples and pears) and concentrated juice is one of the major regional economic activities of Argentina, which has traditionally been one of the world's main fresh fruit and concentrated juice producers. Due to market reasons, there is a strong need to count with reliable decision tools to manage the whole business. In order to tackle this problem, advantages can be taken from developments on formulations of planning and scheduling models. In this work, a realistic planning model of a packaging plant, the most important instance within the fresh fruit supply-chain industry from a tactical point of view, is developed. The model can be applied to estimate the fruit processing capacity of the facility in order to establish future sales policies. (c) 2004 Elsevier Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000229946000006 L2 - fruit industry;packing plant;operations management SO - Journal of Food Engineering 2005 ;70(3):299-307 13224 UI - 2707 AU - Bliokh KY AU - Freilikher VD AU - Makarov NM AD - Inst Radio Astron, Dept Space Radiophys, UA-61002 Kharkov, UkraineBar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, IsraelUniv Autonoma Puebla, Inst Ciencias, Puebla 72050, MexicoBliokh, KY, Inst Radio Astron, Dept Space Radiophys, 4 Krasnoznamyonnaya St, UA-61002 Kharkov, Ukraine TI - Scattering by one-dimensional smooth potentials: between WKB and Born approximation AB - The paper discusses the applicability of WKB and Born (small perturbations) approximations in the problem of the backscattering of quantum particles and classical waves by one-dimensional smooth potentials with small amplitudes compared to the energy of the incident particle (above-barrier scattering). Both deterministic and random potentials are considered. The dependence of the reflection coefficient and localization length oil the amplitude and the longitudinal scale of the scattering potential is investigated. It is shown that perturbation and WKB theories are inconsistent ill the above-barrier backscattering problem. Not only the solutions but the regions of validity of both methods as well depend strongly on the details of the potential profile, and are individual for each potential. For deterministic potentials, a simple criterion that allows determining the boundary between the applicability domains of WKB and Born approximations is found. (c) 2004 Elsevier B.V. All rights reserved MH - Israel MH - Mexico|Puebla MH - Ukraine PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Nanoscience & Nanotechnology;Physics, Condensed Matter U5 - J;Article AV - English IS - 1386-9477 UR - ISI:000227813200035 L2 - above-barrier back scattering;WKB approximation;Born approximation SO - Physica E-Low-Dimensional Systems & Nanostructures 2005 ;27(1-2):262-269 13225 UI - 2566 AU - Boardman AD AU - Rapoport YG AU - Grimalsky VV AU - Ivanov BA AU - Koshevaya SV AU - Velasco L AU - Zaspel CE AD - Univ Salford, Joule Phys Lab, Salford M5 4WT, Greater Manches, EnglandKiev Taras Shevchenko Natl Univ, Fac Phys, UA-03680 Kiev, UkraineNatl Inst Astrophys Opt & Elect, Puebla 72000, MexicoNatl Acad Sci, Inst Magnetism, UA-03142 Kiev, UkraineMinist Educ Ukraine, UA-03142 Kiev, UkraineAutonomous Univ Morelos, CIICAp, Cuernavaca 62210, Morelos, MexicoUniv Montana Western, Dillon, MT 59725, USABoardman, AD, Univ Salford, Joule Phys Lab, Salford M5 4WT, Greater Manches, England TI - Excitation of vortices using linear and nonlinear magnetostatic waves AB - It is shown that stationary vortex structures can be excited in a ferrite film, in the important centimeter and millimeter wavelength ranges. It is shown that both linear and nonlinear structures can be excited using a three-beam interaction created with circular antennas. These give rise to a special phase distribution created by linear and nonlinear mixing. An interesting set of three clockwise rotating vortices joined by one counter-rotating one presents itself in the linear regime: a scenario that is only qualitatively changed by the onset of nonlinearity. It is pointed out that control of the vortex structure, through parametric coupling, based upon a microwave resonator, is possible and that there are many interesting possibilities for applications MH - United Kingdom MH - Mexico|Morelos MH - Mexico|Puebla MH - Ukraine MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Physics, Fluids & Plasmas;Physics, Mathematical U5 - J;Article AV - English IS - 1063-651X UR - ISI:000228246200086 L2 - ALFVEN VORTICES; SPIN-WAVES; SOLITONS; FILMS; DISLOCATIONS; INSTABILITY; GENERATION SO - Physical Review e 2005 ;71(2): 13226 UI - 1200 AU - Boiko I AU - Fridman L AD - SNC Lavalin, Calgary, AB T2P 3G5, CanadaUniv Nacl Autonoma Mexico, Fac Ingn, Mexico City 04510, DF, MexicoBoiko, I, SNC Lavalin, Calgary, AB T2P 3G5, Canada TI - Analysis of chattering in continuous sliding-mode controllers AB - An analysis of two most popular continuous sliding-mode algorithms: The power-fractional sliding-mode algorithm and a second-order sliding-mode algorithm known as the super-twisting is carried out in the frequency domain with the use of the describing function method. It is shown that in the presence of an actuator, the transient process converges to a periodic motion. Parameters of this periodic motion are analyzed. A few examples are considered to illustrate the obtained results MH - Canada MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 13 U4 - Automation & Control Systems;Engineering, Electrical & Electronic U5 - J;Article AV - English IS - 0018-9286 UR - ISI:000231861500027 L2 - chattering;relay control;sliding-mode (SM);variable structure systems;FREQUENCY-DOMAIN; SYSTEMS SO - Ieee Transactions on Automatic Control 2005 ;50(9):1442-1446 13227 UI - 1831 AU - Bojdecki T AU - Gorostiza LG AD - Univ Warsaw, Inst Math, PL-02097 Warsaw, PolandCtr Invest & Estudios Avanzados, Dept Math, Mexico City 07000, DF, MexicoGorostiza, LG, Univ Warsaw, Inst Math, Ul Banacha 2, PL-02097 Warsaw, Poland TI - Occupation times of Brownian segments and the sigma-finite Wiener measure AB - We give an asymptotic result for the occupation of Borel sets of functions by the segments of recurrent Brownian motion on consecutive time intervals [n, n + 1], n = 0, 1, 2_... This result provides new information on the behavior of Brownian motion, which is illustrated by examples. A formulation in terms of weak convergence of random measures on Polish space is also given. The proof is based on (a strengthened form of) the Darling-Kac occupation time theorem for Markov chains, and our result can be viewed as a "trajectorial" extension of that theorem. The main role in the occupation limit for Brownian segments is played by the sigma-finite Wiener measure, which first appeared in a different context. An extension for segments of symmetric alpha-stable Levy processes is also given MH - Mexico|Distrito Federal MH - Poland PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Mathematical;Statistics & Probability U5 - J;Article AV - English IS - 0219-0257 UR - ISI:000230279700003 L2 - Brownian segments;alpha-stable segments;Markov chain;occupation time;random measure;sigma-finite Wiener measure;RANDOM DISTRIBUTIONS; SPACE; LOCALIZATION SO - Infinite Dimensional Analysis Quantum Probability and Related Topics 2005 ;8(2):199-213 13228 UI - 1146 AU - Bojorquez-Tapia LA AU - Sanchez-Colon S AU - Martinez AF AD - Univ Arizona, Sch Nat Resources, Tucson, AZ 85721, USAInst Politecn Nacl, Dept Bot, Escuela Nacl Ciencias Biol, Mexico City 11340, DF, MexicoBojorquez-Tapia, LA, Univ Arizona, Sch Nat Resources, Biol Sci E,Rm 207, Tucson, AZ 85721 USA TI - Building consensus in environmental impact assessment through multicriteria modeling and sensitivity analysis AB - Multicriteria decision analysis (MCDA) increasingly is being applied in environmental impactassessment (EIA). In this article, two MCDA techniques, stochastic analytic hierarchy process and compromise programming, are combined to ascertain the environmental impacts of and to rank two alternative sites for Mexico City's new airport. Extensive sensitivity analyses were performed to determine the probability of changes in rank ordering given uncertainty in the hierarchy structure, decision criteria weights, and decision criteria performances. Results demonstrate that sensitivity analysis is fundamental for attaining consensus among members of interdisciplinary teams and for settling debates in controversial projects. It was concluded that sensitivity analysis is critical for achieving a transparent and technically defensible MCDA implementation in controversial EIA MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Environmental Sciences U5 - J;Article AV - English IS - 0364-152X UR - ISI:000231959000011 L2 - airport;analytic hierarchy process;compromise programming;conflict resolution;environmental impact assessments;Mexico;participatory planning;sensitivity analysis;suitability analysis;uncertainty;ANALYTIC HIERARCHY PROCESS; DECISION-MAKING; UNCERTAINTY; MANAGEMENT; PREFERENCE; JUDGMENTS; AHP SO - Environmental Management 2005 ;36(3):469-481 13229 UI - 2368 AU - Bojowald M AU - Morales-Tecotl HA AU - Sahlmann H AD - Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Golm, GermanyPenn State Univ, Ctr Gravitat Phys & Geometry, Davey Lab 104, University Pk, PA 16802, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoBojowald, M, Albert Einstein Inst, Max Planck Inst Gravitat Phys, Muhlenberg 1, D-14476 Golm, Germany TI - Loop quantum gravity phenomenology and the issue of Lorentz invariance AB - A simple model is constructed which allows to compute modified dispersion relations with effects from loop quantum gravity. Different quantization choices can be realized and their effects on the order of corrections studied explicitly. A comparison with more involved semiclassical techniques shows that there is agreement even at a quantitative level. Furthermore, by contrasting Hamiltonian and Lagrangian descriptions we show that possible Lorentz symmetry violations may be blurred as an artifact of the approximation scheme. Whether this is the case in a purely Hamiltonian analysis can be resolved by an improvement in the effective semiclassical analysis MH - Germany MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 9 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000228765800050 L2 - GAMMA-RAY BURSTS; SYNCHROTRON-RADIATION; SPECIAL RELATIVITY; COSMOLOGY; TIME; QUANTIZATION; CONSTRAINT; GEOMETRY; LIMITS SO - Physical Review D 2005 ;71(8): 13230 UI - 2167 AU - Bolongaro-Crevenna A AU - Torres-Rodriguez V AU - Sorani V AU - Frame D AU - Ortiz MA AD - Acad Nacl Invest & Desarrollo, Temixco 62580, Morelos, MexicoUniv Autonoma Estado Morelos, Fac Ciencias Biol, Chamilpa 62210, MexicoUniv Autonoma Estado Morelos, Ctr Educ Ambiental & Invest Sierra Huautla, Lab Interdisciplinario Sistemas Informat Geog, Chamilpa 62210, MexicoInst Bot, F-34090 Montpellier, FranceUniv Nacl Autonoma Mexico, Inst Geog, Mexico City 04510, DF, MexicoBolongaro-Crevenna, A, Acad Nacl Invest & Desarrollo, Wimbledon 31-B,Fracc Junto al Rio, Temixco 62580, Morelos, Mexico TI - Geomorphometric analysis for characterizing landforms in Morelos State, Mexico AB - Landforms can be described and quantified into simple relief elements by parametrization of digital elevation model (DEM). In this research, we investigate the use of morphometric parameters and a new classification scheme to characterize selected elemental forms associated with landforms. We apply and test this methodology on a geomorphologically diverse region located in Central Mexico. These simple elements are known as morphometric classes and include ridge, plane, channel, pit, peak, and pass. These classes correspond to real entities and are of practical significance. The morphometric classes were grouped according to their areal parameters (ridge, plane, and channel) and pointed parameters (pit, peak, and pass), which can be used to form the basis of a system of characterization and classification of landforms. Landform elements display statistically significant compositional differences with respect to their proportions of morphometric classes. This, in turn, can be plotted onto a diagram of characterization and classification known as a double ternary diagram (DTD), which comprises both areal and pointed parameters and any combination thereof. The DTD is useful for studying geomorphological processes wherein areal and point values and properties have expressions which are topographically quantifiable. (c) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Morelos MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000229375400010 L2 - DEM;geomorphometry;relief analysis SO - Geomorphology 2005 ;67(3-4):407-422 13231 UI - 272 AU - Bolshakov IA AU - Bolshakova EI AD - IPN, Ctr Res Comp, CIC, Mexico City 07738, DF, Mexico. Moscow MV Lomonosov State Univ, Fac Computat Math & Cybernet, Moscow, Russia TI - Measurements of lexico-syntactic cohesion by means of Internet AB - Syntactic links between content words in meaningful texts are intuitively conceived 'normal,' thus ensuring text cohesion. Nevertheless we are not aware on a broadly accepted Internet-based measure of cohesion between words syntactically linked in terms of Dependency Grammars. We propose to measure lexico-syntactic cohesion between content words by means of Internet with a specially introduced Stable Connection Index (SCI). SCI is similar to Mutual Information known in statistics, but does not require iterative evaluation of total amount of Web-pages under search engine's control and is insensitive to both fluctuations and slow growth of raw Web statistics. Based on Russian, Spanish, and English materials, SCI presented concentrated distributions for various types of word combinations; hence lexico-syntactic cohesion acquires a simple numeric measure. It is shown that SCI evaluations can be successfully used for semantic error detection and correction, as well as for information retrieval MH - Mexico|Distrito Federal MH - Russia T3 - MICAI 2005: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleigor@cic.ipn.mx bolsh@cs.msu.su1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBDJ68 AV - English IS - 0302-9743 UR - ISI:000233852000080 SO - 2005 ;():790-799 13232 UI - 2229 AU - Boltyanski V AU - Martini H AD - CIMAT, Guanajuato 36000, Gto, MexicoTech Univ Chemnitz, Fak Math, D-09107 Chemnitz, GermanyBoltyanski, V, CIMAT, AP 402, Guanajuato 36000, Gto, Mexico TI - Separability of H-convex sets AB - We consider the problem of H-separability for two H-convex sets A, B &SUB; R-n. There are two types of H-separability. The first one, called "strict H-separability", is the separation (in the usual sense) of the sets A and B by an H-convex hyperplane. The second one ("weak H-separability") means to look for an H-convex half-space P such that A is situated in P, whereas B has no point in common with the interior of P. We give necessary and sufficient conditions for both these types of H-separability; the results are connected with H-convexity of the Minkowski sum of H-convex sets, see [7]. Some examples illustrate the obtained results MH - Germany MH - Mexico|Guanajuato PB - LEMGO: HELDERMANN VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0944-6532 UR - ISI:000229119400008 L2 - convex sets;H-convexity;Minkowski addition;separation theory SO - Journal of Convex Analysis 2005 ;12(1):131-137 13233 UI - 1494 AU - Bombelli L AU - Corichi A AU - Winkler O AD - Univ Mississippi, Dept Phys & Astron, Mississippi State, MS 38677, USAPerimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, CanadaNatl Autonomous Univ Mexico, Inst Ciencias Nucl, Dept Gravitat & Field Theory, Mexico City 04510, DF, MexicoCorichi, A, Univ Mississippi, Dept Phys & Astron, Mississippi State, MS 38677 USA TI - Semiclassical quantum gravity: statistics of combinatorial Riemannian geometries AB - This paper is a contribution to the development of a framework, to be used in the context of semiclassical canonical quantum gravity, in which to frame questions about the correspondence between discrete spacetime structures at "quantum scales" and continuum, classical geometries at large scales. Such a correspondence can be meaningfully established when one has a "semiclassical" state in the underlying quantum gravity theory, and the uncertainties in the correspondence arise both from quantum fluctuations in this state and from the kinematical procedure of matching a smooth geometry to a discrete one. We focus on the latter type of uncertainty, and suggest the use of statistical geometry as a way to quantify it. With a cell complex as an example of discrete structure, we discuss how to construct quantities that define a smooth geometry, and how to estimate the associated uncertainties. We also comment briefly on how to combine our results with uncertainties in the underlying quantum state, and on their use when considering phenomenological aspects of quantum gravity. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - USA MH - Canada MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 6 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0003-3804 UR - ISI:000231080800003 L2 - quantum gravity;semiclassical states;statistical geometry;SPIN FOAM MODELS; REGGE CALCULUS; FIELD-THEORY; STATES; WEAVE SO - Annalen der Physik 2005 ;14(8):499-519 13234 UI - 1878 AU - Bonavida B AU - Vega MI AD - Univ Calif Los Angeles, David Geffen Sch Med, Jonsson Comprehens Canc Ctr, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA 90095, USACNM La Raza, IMSS Med, Unidad Invest Med Immunol & Infectol, Mexico City 02200, DF, MexicoBonavida, B, Univ Calif Los Angeles, David Geffen Sch Med, Jonsson Comprehens Canc Ctr, Dept Microbiol Immunol & Mol Genet, CHS A2-060,10833 Le Conte Ave, Los Angeles, CA 90095 USA TI - Rituximab-mediated chemosensitization of AIDS and non-AIDS non-Hodgkin's Lymphoma AB - Patients with B non-Hodgkin's Lymphoma (NHL) initially respond to conventional chemotherapy. However, relapses and recurrences occur and the patients develop resistance to further treatment. Immunotherapeutic approaches have been considered in the treatment of such patients. Rituximab (chimeric anti-human CD20 monoclonal antibody) is the first anti-cancer monoclonal antibody approved by the FDA for the treatment of B-NHL. It has been used alone or in combination with chemotherapy, and the clinical response rates have been 50% and greater than 95%, respectively. The in vivo mechanism by which rituximab mediates its effects is not clear, though ADCC, CDC and apoptosis have been suggested and supported by several studies. However, many patients do not respond to rituximab or become refractory to rituximab treatment and the underlying mechanism of unresponsiveness is not known. This review describes various molecular signaling pathways modified by rituximab using in vitro B-NHL cell lines as model systems. The findings demonstrate that rituximab treatment modulates the p38 MAPK, the Raf-1/MEK/ERK1/2 and the NF-kappa B pathways. These modifications induced by rituximab were in large part responsible for the down-regulation of the anti-apoptotic gene products Bcl-2/Bcl-xL and chemosensitization of the drug-resistant B-NHL cell lines to various drug-induced apoptosis. Studies on the development of resistance to rituximab were investigated with rituximab-resistant B-NHL clones derived from rituximab-sensitive B-NHL cell lines. The molecular signaling pathways modified by rituximab revealed several novel intracellular targets whose modification could sensitize both rituximab-sensitive and rituximab-resistant B-NHL to drug-induced apoptosis. These in vitro findings provide new possibilities for improving the clinical effectiveness of rituximab as well as for circumventing its resistance. (c) 2005 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Distrito Federal PB - EDINBURGH: CHURCHILL LIVINGSTONE RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy U5 - J;Review AV - English IS - 1368-7646 UR - ISI:000230206600005 L2 - rituximab;B-NHL;chemosensitization;rituximab resistance;cell signaling;Bcl-2/Bcl-xL;Raf-1/MEK/ERK pathways;NF-kappa B pathway;RKIP;CHRONIC LYMPHOCYTIC-LEUKEMIA; NF-KAPPA-B; ANTI-CD20 MONOCLONAL-ANTIBODY; KINASE INHIBITOR PROTEIN; PACLITAXEL-INDUCED APOPTOSIS; CD20 ANTIGEN-EXPRESSION; DRUG-INDUCED APOPTOSIS; BCL-2 FAMILY-MEMBERS; CELL-LINES; IN-VIVO SO - Drug Resistance Updates 2005 ;8(1-2):27-41 13235 UI - 2171 AU - Bond JG AU - rredondo-Jimenez JI AU - Rodriguez MH AU - Quiroz-Martinez H AU - Williams T AD - Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, SpainINSP, Ctr Invest Paludismo, Tapachula, MexicoECOSUR, Tapachula, MexicoINSP, Ctr Invest Enfermedades Infecc, Cuernavaca, Morelos, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Biol, San Nicolas De Los Garza, MexicoWilliams, T, Univ Publ Navarra, Dept Agr Prod, Pamplona 31006, Spain TI - Oviposition habitat selection for a predator refuge and food source in a mosquito AB - 1. The influence of filamentous algae on oviposition habitat selection by the mosquito Anopheles pseudopunctipennis and the consequences of oviposition decisions on the diet, development, body size, and survival of offspring were examined. 2. A natural population of An. pseudopunctipennis in Chiapas, Mexico, oviposited almost exclusively in containers with filamentous algae. Algae represented 47% of the gut contents of mosquito larvae sampled from the natural population. Mosquito larvae fed on an exclusive diet of algae developed as quickly and achieved the same adult body size (wing length) as their conspecifics fed on a standard laboratory diet. 3. Multiple regression of survival of mosquito larvae on percentage surface area cover of algae (0-99%) and the density of predatory fish (zero to four fish per container) was best described by a second-order polynomial model. Increasing fish densities resulted in a reduction in mosquito survival in all algal treatments. The highest incidence of survival was observed at intermediate (66%) algal cover in all treatments. 4. The presence of fish significantly extended larval development times whereas algal cover had no significant effect. The presence of fish resulted in emergence of smaller adults due to reduced feeding opportunities and predator avoidance behaviour. Algal cover also affected mosquito wing length but differently at each fish density. 5. Oviposition habitat selection improves survival in the presence of predators and feeding opportunities for An. pseudopunctipennis larvae MH - Mexico|Morelos MH - Mexico|Nuevo Leon MH - Mexico|Chiapas MH - Spain PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 7 U4 - Entomology U5 - J;Article AV - English IS - 0307-6946 UR - ISI:000229428500002 L2 - Anopheles pseudopunctipennis;Cladophora glomerata;feeding;fish;gut analysis;offspring survival;oviposition;predators;Spirogyra majuscula;TAPACHULA FOOTHILLS AREA; LIFE-HISTORY SHIFTS; ANOPHELES-PSEUDOPUNCTIPENNIS; CULISETA-LONGIAREOLATA; LARVAL HABITATS; CULEX MOSQUITOS; SOUTHERN CALIFORNIA; FEEDING-BEHAVIOR; CENTRAL-AMERICA; AEDES-AEGYPTI SO - Ecological Entomology 2005 ;30(3):255-263 13236 UI - 1193 AU - Borchert R AU - Robertson K AU - Schwartz MD AU - Williams-Linera G AD - Univ Kansas, Div Biol Sci, Lawrence, KS 66045, USATall Timbers Res Stn, Tallahassee, FL 32312, USAUniv Wisconsin, Dept Geog, Milwaukee, WI 53210, USAInst Ecol AC, Dept Funct Ecol, Xalapa 91000, Veracruz, MexicoBorchert, R, Univ Kansas, Div Biol Sci, Lawrence, KS 66045, USA TI - Phenology of temperate trees in tropical climates AB - Several North American broad-leaved tree species range from the northern United States at similar to 47 degrees N to moist tropical montane forests in Mexico and Central America at 15-20 degrees N. Along this gradient the average minimum temperatures of the coldest month (T (Jan)), which characterize annual variation in temperature, increase from -10 to 12 degrees C and tree phenology changes from deciduous to leaf-exchanging or evergreen in the southern range with a year-long growing season. Between 30 and 45 degrees N, the time of bud break is highly correlated with T (Jan) and bud break can be reliably predicted for the week in which mean minimum temperature rises to 7 degrees C. Temperature-dependent deciduous phenology-and hence the validity of temperature-driven phenology models-terminates in southern North America near 30 degrees N, where T (Jan)> 7 degrees C enables growth of tropical trees and cultivation of frost-sensitive citrus fruits. In tropical climates most temperate broad-leaved species exchange old for new leaves within a few weeks in January-February, i.e., their phenology becomes similar to that of tropical leaf-exchanging species. Leaf buds of the southern ecotypes of these temperate species are therefore not winter-dormant and have no chilling requirement. As in many tropical trees, bud break of Celtis, Quercus and Fagus growing in warm climates is induced in early spring by increasing daylength. In tropical climates vegetative phenology is determined mainly by leaf longevity, seasonal variation in water stress and day length. As water stress during the dry season varies widely with soil water storage, climate-driven models cannot predict tree phenology in the tropics and tropical tree phenology does not constitute a useful indicator of global warming MH - Mexico|Veracruz MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Biophysics;Environmental Sciences;Meteorology & Atmospheric Sciences;Physiology U5 - J;Article AV - English IS - 0020-7128 UR - ISI:000231882600008 L2 - growing season;latitudinal gradient;minimum temperature;tropical tree phenology;water stress;DRY FOREST TREES; GENETIC-VARIATION; SPRING PHENOLOGY; DORMANCY; ONSET; RAIN; REQUIREMENT; POPULATIONS; GROWTH; LENGTH SO - International Journal of Biometeorology 2005 ;50(1):57-65 13237 UI - 2742 AU - bores-Saavedra J AU - Latif S AU - Carrick KS AU - varado-Cabrero I AU - Fowler MR AD - LSU, Hlth Sci Ctr, Dept Pathol, Shreveport, LA 71130, USAUniv Texas, SW Med Ctr, Dept Pathol, Dallas, TX, USAOncol Hosp Social Secur Syst, Dept Pathol, Mexico City, DF, MexicoAlbores-Saavedra, J, LSU, Hlth Sci Ctr, Dept Pathol, Shreveport, LA 71130 USA TI - CD56 reactivity in small cell carcinoma of the uterine cervix AB - Small cell carcinoma (SCC) of the uterine cervix, like its pulmonary counterpart, is a rare but distinctive neoplasm that should be separated from nonendocrine carcinomas because of its highly aggressive clinical course and response to chemotherapy and irradiation. CD56 (neural cell adhesion molecule) has recently been shown to be the best marker for the diagnosis of pulmonary SCC. In this study, we assessed the sensitivity and specificity of CD56 in the diagnosis of SCC of the uterine cervix compared with those of chromogranin and synaptophysin. Twenty-two (88%) of 25 SCCs of the uterine cervix labeled with CD56 in a predominantly membranous and diffuse pattern, whereas 16 of 25 (64%) stained with synaptophysin in a predominantly diffuse pattern and 8 of 25 (32%) showed predominantly focal immunoreactivity for chromogranin. In contrast, 3 of 21 (14%) moderately to poorly differentiated squamous cell carcinomas and I of 16 (6%) moderately differentiated adenocarcinomas showed focal immunoreactivity for CD56. Although not specific, CD56 seems to be the most sensitive marker for the diagnosis of SCC of the uterine cervix. Moreover, its diffuse reactivity reduces the possibility of obtaining negative results in small biopsy samples MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 6 U4 - Obstetrics & Gynecology;Pathology U5 - J;Article AV - English IS - 0277-1691 UR - ISI:000227883400001 L2 - small cell carcinoma;uterine cervix;CD56;chromogranin;synaptophysin;MONOCLONAL-ANTIBODY; ADHESION MOLECULE; ENDOCRINE TUMORS; LUNG-CANCER; LIGHT; NCAM; ACTH SO - International Journal of Gynecological Pathology 2005 ;24(2):113-117 13238 UI - 1148 AU - Boreskov KG AU - Turbiner AV AU - Vieyra JCL AD - Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoInst Theoret & Expt Phys, Moscow 117259, RussiaBoreskov, KG, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico TI - Solvability of the Hamiltonians related to exceptional root spaces: Rational case AB - Solvability of the rational quantum integrable systems related to exceptional root spaces G(2), F-4 is re-examined and for E-6,E-7,E-8 is established in the framework of a unified approach. It is shown that Hamiltonians take algebraic form being written in certain Weyl-invariant variables. It is demonstrated that for each Hamiltonian the finite-dimensional invariant subspaces are made from polynomials and they form an infinite flag. A notion of minimal flag is introduced and minimal flag for each Hamiltonian is found. Corresponding eigenvalues are calculated explicitly while the eigen-functions can be computed by pure linear algebra means for arbitrary values of the coupling constants. The Hamiltonian of each model can be expressed in the algebraic form as a second degree polynomial in the generators of some infinite-dimensional but finitely-generated Lie algebra of differential operators, taken in a finite-dimensional representation MH - Mexico|Distrito Federal MH - Russia PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Physics, Mathematical U5 - J;Article AV - English IS - 0010-3616 UR - ISI:000231994900002 L2 - CALOGERO-SUTHERLAND MODEL; MANY-BODY PROBLEMS; INTEGRABLE SYSTEMS; SL(2) ALGEBRA; LIE-ALGEBRAS; QUANTUM SO - Communications in Mathematical Physics 2005 ;260(1):17-44 13239 UI - 2084 AU - Borges G AU - Mondragon L AU - Medina-Mora ME AU - Orozco R AU - Zambrano J AU - Cherpitel C AD - Metropolitan Autonomous Univ Xochimilco, Mexico City, DF, MexicoNatl Inst Psychiat, Div Epidemiol & Psychosocial Res, Col San Lorenzo Huipul 14370, MexicoAlcohol Res Grp, Berkeley, CA, USABorges, G, Metropolitan Autonomous Univ Xochimilco, Mexico City, DF, Mexico TI - A case-control study of alcohol and substance use disorders as risk factors for non-fatal injury AB - Aims: While alcohol use is thought to be a major risk factor for both fatal and non-fatal injuries, the association of substance use disorders (alcohol use disorders, AUD and substance use disorders, SUD) with occurrence of injury has not received the same attention. To report the association of AUD and SUD, according to diagnostic and statistics manual of mental disorders-IV (DSM-IV) and international classification of diseases 10 (ICD-10) criteria, and the risk of non-fatal injuries. Methods: A case-control study: Cases included 653 injured patients, 18-65-years-old, who attended one emergency department (ED). Controls included 1131 subjects from a representative sample of residents of Mexico City, of the same age group. Information on drug and alcohol use was obtained by interview using the world mental health version of the composite international diagnostic interview (WMH-CIDI). Results: Among injured patients, the prevalence of substance abuse or dependence within the last 12 months was 12.3% for alcohol and 2.5% for other substances (marijuana, cocaine, tranquilizers, amphetamines, others). Among residents of Mexico City, these prevalences were 1.8 and 0.3%, respectively. Adjusted odds ratios (OR) of injury according to alcohol and substance use were 4.95 (95% confidence interval (CI): 2.87-8.52) for alcohol and 2.58 (0.73-9.17) for other substances. An important level of comorbid alcohol and substance use disorders was also found. Conclusions: Efforts in the ED should be carried out to treat and/or refer patients with alcohol and substance use disorders, and special care should be taken to address comorbid cases MH - Mexico|Distrito Federal MH - USA PB - OXFORD: OXFORD UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Substance Abuse U5 - J;Article AV - English IS - 0735-0414 UR - ISI:000229700200001 L2 - INTERNATIONAL DIAGNOSTIC INTERVIEW; WORLD-HEALTH-ORGANIZATION; EMERGENCY-ROOM PATIENTS; DRUG-USE; UNITED-STATES; PSYCHIATRIC EPIDEMIOLOGY; TRAUMA CENTER; PREVALENCE; ABUSE; VALIDITY SO - Alcohol and Alcoholism 2005 ;40(4):257-262 13240 UI - 1154 AU - Borisov B AU - Kuryatkov V AU - Kudryavtsev Y AU - Asomoza R AU - Nikishin S AU - Song DY AU - Holtz M AU - Temkin H AD - Texas Tech Univ, Nano Tech Ctr, Lubbock, TX 79401, USATexas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79401, USACINVESTAV, SIMS Lab SEES, Dept Elect Engn, Mexico City 07300, DF, MexicoNikishin, S, Texas Tech Univ, Nano Tech Ctr, Lubbock, TX 79401, USA TI - Si-doped AlxGa1-xN(0.56 <= x <= 1) layers grown by molecular beam epitaxy with ammonia AB - We describe experiments on Si doping in AlxGa1-xN grown by gas source molecular beam epitaxy with ammonia and silane. Growth conditions that minimize self-compensation were used to assure Si incorporation at a level of 2x10(20) cm(-3) for the entire range of compositions investigated, from x=0.56 to 1.0. These conditions resulted in donor concentrations of similar to 1x10(19) cm(-3) up to x=0.85. Layers of AlxGa1-xN up to x=0.85 show good mobility and low resistivity. In these layers, the activation energy, E-a, of Si stays below similar to 25 meV and Si can be considered a shallow donor. For AlN content above x=0.85 the donor activation energy increases to E(a)similar to 250 meV in AlN. The change in donor activation energy correlates with increased incorporation of oxygen and carbon. (C) 2005 American Institute of Physics MH - Mexico|Distrito Federal MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 4 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000232060200029 L2 - N-TYPE; ALGAN; ALN; CONDUCTION; SI(111); ALLOYS; DONORS SO - Applied Physics Letters 2005 ;87(13): 13241 UI - 1802 AU - Borquez E AU - Cleaves HJ AU - Lazcano A AU - Miller SL AD - UNAM, Fac Ciencias, Mexico City, DF, MexicoUniv Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093, USALazcano, A, UNAM, Fac Ciencias, Cd Univ, Mexico City, DF, Mexico TI - An investigation of prebiotic purine synthesis from the hydrolysis of HCN polymers AB - The polymerization of concentrated NH4CN solutions has been studied at various temperatures and ammonia concentrations. The products of the oligomerization of ammonium cyanide include adenine and guanine, as well as trace amounts of 2,6-diaminopurine. Our results indicate that the adenine yield is not strongly dependent on temperature. Guanine is produced in lower yield. The original studies by Oro and Kimball (1961) showed that the 6 N HCl hydrolysis of the NH4CN polymerization supernatant greatly increased the adenine yield. However, this hydrolysis also decomposes adenine and other purines. Therefore, we have measured the yields from an NH4CN polymerization as a function of hydrolysis time, and found that shorter hydrolytic periods give higher yields of adenine. We have also investigated the hydrolysis of the supernatant at pH 8, which is a more reasonable model of primitive oceanic conditions, and found that the adenine yield is comparable to that obtained with acid hydrolysis (approximately 0.1%). The yield of adenine does not decline at longer hydrolysis times because of the greater stability of adenine at pH 8. The insoluble black polymer formed from NH4CN has been analyzed by both acid and neutral hydrolysis. In both cases adenine yields of approximately 0.05% were obtained. This suggests that the polymer may have been as important a prebiotic source of purines as the usually analyzed supernatant MH - Mexico|Distrito Federal MH - USA PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 6 U4 - Biology U5 - J;Article AV - English IS - 0169-6149 UR - ISI:000230311200001 L2 - 2,6-diaminopurine;adenine;guanine;NH4CN polymerization;PRIMITIVE EARTH CONDITIONS; HYDROGEN-CYANIDE; AMINO-ACIDS; CHEMICAL EVOLUTION; ADENINE; ORIGIN; LIFE; GUANINE SO - Origins of Life and Evolution of the Biosphere 2005 ;35(2):79-90 13242 UI - 2625 AU - Bottcher A AU - Grudsky SM AD - TU Chemnitz, Fac Math, D-09107 Chemnitz, GermanyInst Politecn Nacl, CINVESTAV, Dept Matemat, Mexico City 07000, DF, MexicoBottcher, A, TU Chemnitz, Fac Math, D-09107 Chemnitz, Germany TI - Structured condition numbers of large Toeplitz matrices are rarely better than usual condition numbers AB - When working with structured matrices, structured condition numbers are more meaningful than Usual condition numbers. The Usual condition numbers of Toeplitz matrices may grow exponentially with the dimension of the matrix. The purpose of this note is to show that in this case the structured condition numbers do with high probability also increase exponentially, which supports the claim that one is not likely to win much on the average Toeplitz input by passing from the Usual condition numbers of Toeplitz matrices to their structured counterparts. Copyright (c) 2004 John Wiley W Sons, Ltd MH - Germany MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 1 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 1070-5325 UR - ISI:000228112200003 L2 - Toeplitz matrix;structured condition number SO - Numerical Linear Algebra with Applications 2005 ;12(2-3):95-102 13243 UI - 1217 AU - Bottcher M AU - Harvey J AU - Joshi M AU - Villata M AU - Raiteri CM AU - Bramel D AU - Mukherjee R AU - Savolainen T AU - Cui W AU - Fossati G AU - Smith IA AU - Able D AU - Aller HD AU - Aller MF AU - Arkharov AA AU - Augusteijn T AU - Baliyan K AU - Barnaby D AU - Berdyugin A AU - Benitez E AU - Boltwood P AU - Carini M AU - Carosati D AU - Ciprini S AU - Coloma JM AU - Crapanzano S AU - de Diego JA AU - Di Paola A AU - Dolci M AU - Fan J AU - Frasca A AU - Hagen-Thorn V AU - Horan D AU - Ibrahimov M AU - Kimeridze GN AU - Kovalev YA AU - Kovalev YY AU - Kurtanidze O AU - Lahteenmaki A AU - Lanteri L AU - Larionov VM AU - Larionova EG AU - Lindfors E AU - Marilli E AU - Mirabal N AU - Nikolashvili M AU - Nilsson K AU - Ohlert JM AU - Ohnishi T AU - Oksanen A AU - Ostorero L AU - Oyer G AU - Papadakis I AU - Pasanen M AU - Poteet C AU - Pursimo T AU - Sadakane K AU - Sigua LA AU - Takalo L AU - Tartar JB AU - Terasranta H AU - Tosti G AU - Walters R AU - Wiik K AU - Wilking BA AU - Wills W AU - Xilouris E AU - Fletcher AB AU - Gu M AU - Lee CU AU - Pak S AU - Yim HS AD - Ohio Univ, Inst Astrophys, Dept Phys & Astron, Athens, OH 45701, USAOsserv Astron Torino, Ist Nazl Astrofis, I-10025 Pino Torinese, ItalyColumbia Univ Barnard Coll, New York, NY 10027, USATurku Univ, Tuorla Observ, Piikkio, FinlandPurdue Univ, Dept Phys, W Lafayette, IN 47907, USARice Univ, Dept Phys & Astron, Houston, TX 77005, USAUniv Michigan, Dept Astron, Ann Arbor, MI 48109, USAPulkovo Observ, St Petersburg 196140, RussiaNord Opt Telescope, E-38700 Santa Cruz De La Palma, Santa Cruz De T, SpainPhys Res Lab, Ahmedabad 3800009, Gujarat, IndiaWestern Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42104, USANatl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoBoltwood Observ, Stittsville, ON K2S 1N6, CanadaOsservatorio Armenzano, Assisi, ItalyUniv Perugia, Osservatorio Astron, I-06126 Perugia, ItalyAgrupacion Astron Sabadell, Sabadell 08200, SpainOsserv Astron Roma, Ist Nazl Astrofis, I-00136 Rome, ItalyOsservatorio Astron Teramo, INAF, Teramo, ItalyGuangzhou Univ, Ctr Astrophys, Guangzhou 510400, Peoples R ChinaOsserv Astrofis Catania, I-95125 Catania, ItalySt Petersburg State Univ, Inst Astron, St Petersburg 198504, RussiaIsaac Newton Inst Chile, St Petersburg Branch, St Petersburg 198504, RussiaHarvard Smithsonian Ctr Astrophys, Cambridge, MA 02138, USAUzbek Acad Sci, Ulugh Beg Astron Inst, Tashkent 700052, UzbekistanAbastumani Observ, GE-383762 Abastumani, Rep of GeorgiaCtr Astro Space, Moscow 117997, RussiaNatl Radio Astron Observ, Green Bank, WV 24944, USAHelsinki Univ Technol, Metsahovi Radio Observ, Kylmala 02540, FinlandColumbia Univ, Dept Phys & Astron, New York, NY 10027, USAMichael Adrian Observ, Astron Stiftung Trebur, D-65468 Trebur, GermanyOsaka Kyoiku Univ, Inst Astron, Kashiwara, Osaka 5828582, JapanNyrola Observ, Jyvaskylan Sirius Ry, Jyvaskyla 40950, FinlandLandessternwarte Heidelberg Konigstuhl, D-69117 Heidelberg, GermanyUniv Crete, Dept Phys, GR-71003 Iraklion, Crete, GreeceFdn Res & Technol Hellas, IESL, GR-71110 Iraklion, Crete, GreeceUniv Missouri, Dept Phys & Astron, St Louis, MO 63121, USAJapan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, JapanNOA, Inst Astron & Astrophys, Athens, GreeceKorea Astron & Space Sci Inst, Taejon 305348, South KoreaChinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R ChinaChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R ChinaBottcher, M, Ohio Univ, Inst Astrophys, Dept Phys & Astron, Clippinger 339, Athens, OH 45701 USA TI - Coordinated multiwavelength observation of 3C 66A during the WEBT campaign of 2003-2004 AB - The BL Lac object 3C 66A was the target of an extensive multiwavelength monitoring campaign from 2003 July through 2004 April (with a core campaign from 2003 September to 2003 December) involving observations throughout the electromagnetic spectrum. Radio, infrared, and optical observations were carried out by the WEBT-ENIGMA collaboration. At higher energies, 3C 66Awas observed in X-rays (RXTE), and at very high energy (VHE) in gamma-rays (STACEE, VERITAS). In addition, the source has been observed with the VLBA at nine epochs throughout the period 2003 September to 2004 December, including three epochs contemporaneous with the core campaign. A gradual brightening of the source over the course of the campaign was observed at all optical frequencies, culminating in a very bright maximum around 2004 February 18. The WEBT campaign revealed microvariability with flux changes of similar to 5% on timescales as short as similar to 2 hr. The source was in a relatively bright state, with several bright flares on timescales of several days. The spectral energy distribution (SED) indicates a v F v peak in the optical regime. A weak trend of optical spectral hysteresis with a trend of spectral softening throughout both the rising and decaying phases has been found. On longer timescales, there appears to be a weak indication of a positive hardness-intensity correlation for low optical fluxes, which does not persist at higher flux levels. The 3-10 keV X-ray flux of 3C 66A during the core campaign was historically high and its spectrum very soft, indicating that the low-frequency component of the broadband SED extends beyond similar to 10 keV. No significant X-ray flux and/or spectral variability was detected. STACEE and Whipple observations provided upper flux limits at > 150 and > 390 GeV, respectively. The 22 and 43 GHz data from the three VLBA epochs made between 2003 September and 2004 January indicate a rather smooth jet with only very moderate internal structure. Evidence for superluminal motion (8.5 +/- 5.6 h(-1) c) was found in only one of six components, while the apparent velocities of all other components are consistent with 0. The radial radio brightness profile suggests a magnetic field decay proportional to r(-1) and, thus, a predominantly perpendicular magnetic field orientation MH - Canada MH - Finland MH - Germany MH - Greece MH - India MH - Italy MH - Japan MH - Mexico|Distrito Federal MH - USA MH - Peoples R China MH - Rep of Georgia MH - Russia MH - South Korea MH - Spain MH - Uzbekistan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 13 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000231959100011 L2 - BL Lacertae objects : individual (3C 66A);galaxies : active;gamma rays : theory;radiation mechanisms : nonthermal;BL-LACERTAE OBJECTS; EXTRAGALACTIC RADIO-SOURCES; TEV GAMMA-RAYS; XMM-NEWTON OBSERVATIONS; LIGHT CURVES; LAC OBJECTS; X-RAY; BACKGROUND-RADIATION; BRIGHT BLAZARS; VARIABILITY SO - Astrophysical Journal 2005 ;631(1):169-186 13244 UI - 1977 AU - bou-Douh AM AU - Ito C AU - Toscano RA AU - El-Baga NY AU - El-Khrisy EEA AU - Furukawa H AD - S Valley Univ, Fac Sci, Dept Chem, Aswan, EgyptMeijo Univ, Fac Pharm, Nagoya, Aichi 468, JapanUNAM, Inst Quim, Mexico City 04510, DF, MexicoNRC, Dept Nat Prod, Cairo 12311, EgyptAbou-Douh, AM, S Valley Univ, Fac Sci, Dept Chem, POB 205, Aswan, Egypt TI - Prenylated flavonoids from the root of Egyptian Tephrosia apollinea crystal structure analysis AB - Three complex 7-oxygenated-8-prenylflavones, (-)-semiglabrin and (-)-pseudosemiglabrin, which are diastereoisomers, and lanceolatin A have been isolated from the root of Tephrosia apollinea (Del.) Link (Leguminosae) growing in Southern Egypt, together with two phytosterols, stigmasterol and sitosterol. The structures of the isolated compounds have been elucidated by means of physical and several spectroscopic methods including UV, IR, H-1, C-13 NMR, DEPT, 2D H-1-H-1 COSY, HSQC, HMBC experiments, and high resolution mass spectrometry (HR-MS), as well as some chemical transformations. The stereochemistry of the structures of (-)-semiglabrin and lanceolatin A have been confirmed by X-ray crystal structure analysis. The anticarcinogenic properties of the isolated compounds showed no inhibitory mechanisms concerning the initiation, promotion, and progression stage of carcinogenesis. Moreover, the in vitro antimicrobial activities of the root ethanolic extract are discussed MH - Egypt MH - Japan MH - Mexico|Distrito Federal PB - TUBINGEN: VERLAG Z NATURFORSCH RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Organic U5 - J;Article AV - English IS - 0932-0776 UR - ISI:000229760900018 L2 - Tephrosia apollinea;leguminosae;7-oxygenated-8-prenyl-flavones;lanceolatin A;antimicrobial activity;SPECTRA; PSEUDOSEMIGLABRIN; PURPUREA SO - Zeitschrift fur Naturforschung Section B-A Journal of Chemical Sciences 2005 ;60(4):458-470 13245 UI - 1789 AU - Bournaud F AU - Combes F AU - Jog CJ AU - Puerari I AD - LERMA, Observ Paris, F-75014 Paris, FranceIndian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, IndiaInst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoBournaud, F, LERMA, Observ Paris, 61 Av Observ, F-75014 Paris, France TI - Lopsided spiral galaxies: evidence for gas accretion AB - We quantify the degree of lopsidedness for a sample of 149 galaxies observed in the near-infrared from the OSUBGS sample, and try to explain the physical origin of the observed disk lopsidedness. We confirm previous studies, but for a larger sample, that a large fraction of galaxies have significant lopsidedness in their stellar disks, measured as the Fourier amplitude of the m = 1 component normalised to the average or m = 0 component in the surface density. Late-type galaxies are found to be more lopsided, while the presence of m = 2 spiral arms and bars is correlated with disk lopsidedness. We also show that the m = 1 amplitude is uncorrelated with the presence of companions. Numerical simulations were carried out to study the generation of m = 1 via different processes: galaxy tidal encounters, galaxy mergers, and external gas accretion with subsequent star formation. These simulations show that galaxy interactions and mergers can trigger strong lopsidedness, but do not explain several independent statistical properties of observed galaxies. To explain all the observational results, it is required that a large fraction of lopsidedness results from cosmological accretion of gas on galactic disks, which can create strongly lopsided disks when this accretion is asymmetrical enough MH - France MH - India MH - Mexico|Puebla PB - LES ULIS CEDEX A: EDP SCIENCES RP - NOT IN FILE U3 - TC 23 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6361 UR - ISI:000230428000014 L2 - galaxies : evolution;galaxies : formation;galaxies : structure;galaxies : spiral;DISK GALAXIES; STELLAR BARS; FREQUENCY SO - Astronomy & Astrophysics 2005 ;438(2):507-U26 13246 UI - 150 AU - Boveri M AU - guilar-Pliego J AU - Marquez-Alvarez C AU - Perez-Pariente J AU - Sastre E AD - CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, SpainUniv Autonoma Metropolitana, Area Quim Aplicada, Mexico City, DF, MexicoBoveri, M, CSIC, Inst Catalisis & Petroleoquim, C Marie Curie,2, E-28049 Madrid, Spain TI - Synthesis optimization of pore size tuned HSO3-(CH2)(3)-MCM-41 catalysts for glycerol monoesters preparation AB - A series of high-acidity, tailored pore size, MCM-41 catalysts was prepared and tested for the esterification of glycerol with stearic acid making use of the spontaneous structure swelling occurring at high temperature hydrothermal synthesis. Optimal conditions or surfactant removal, propylthiol post-synthesis grafting and oxidation were found, leading to final sulphur loadings comparable to those of the materials synthesized by co-condensation. A relevant influence of the pore size on the catalytic performance was found, leading to an optimal size of the porous system which maximized the yield to the desired monostearine MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Article AV - English IS - 0167-2991 UR - ISI:000234827501075 L2 - SULFONIC-ACID FUNCTIONALIZATION; FATTY-ACIDS; MCM-41-TYPE SILICA; COMBINED ALKYL; ESTERIFICATION; MONOGLYCERIDES SO - Molecular Sieves: from Basic Research to Industrial Applications, Pts A and B 2005 ;158():1549-1556 13247 UI - 1059 AU - Bracho J AU - Clapp M AU - Marzantowicz W AD - UNAM, Inst Matemat, Mexico City 04510, DF, MexicoAdam Mickiewicz Univ Poznan, Fac Math & Comp Sci, Poznan, PolandBracho, J, UNAM, Inst Matemat, Circuito Exterior CU, Mexico City 04510, DF, Mexico TI - Symmetry breaking solutions of nonlinear elliptic systems AB - We consider nonlinear elliptic systems with Dirichlet boundary condition on a bounded domain in R-N which is invariant with respect to the action of some group G of orthogonal transformations. For every subgroup K of G we give a, simple criterion for the existence of infinitely many solutions which are K-invariant but not G-invariant. We include a detailed discussion of the case N = 3 MH - Mexico|Distrito Federal MH - Poland PB - TORUN: JULIUSZ SCHAUDER CENTER NONLINEAR STUDIES RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 1230-3429 UR - ISI:000232107100010 L2 - variational elliptic systems;symmetry breaking;NONRADIAL SOLUTIONS; POSITIVE SOLUTIONS; EQUATIONS; EXISTENCE; ANNULUS SO - Topological Methods in Nonlinear Analysis 2005 ;26(1):189-201 13248 UI - 1708 AU - Brackett WW AU - Brackett MG AU - Dib A AU - Franco G AU - Estudillo H AD - Med Coll Georgia, Sch Dent, Dept Oral Rehabil, Augusta, GA 30912, USABenemerita Univ Autonoma Puebla, Fac Estomatol, Puebla, MexicoBrackett, WW, Med Coll Georgia, Sch Dent, Dept Oral Rehabil, Augusta, GA 30912 USA TI - Eighteen-month clinical performance of a self-etching primer in unprepared class V resin restorations AB - This study evaluated the clinical performance of unprepared Class V resin composites, placed using a self-etching primer and a single-bottle adhesive, over a period of 18 months. Thirty-eight pairs of restorations of Renew hybrid resin composite (BISCO, Inc) were placed using adhesives from the same manufacturer in caries-free cervical erosion/abfraction lesions. Based on insensitivity to air, the dentin in 76% of these lesions was considered to be sclerotic. The restorations were placed without abrasion of tooth surfaces, except for cleaning with plain pumice. One of each pair was placed using Tyrian, a self-etching primer and the other was placed using One-Step, a single-bottle adhesive placed after acid etching. Both the etchant and self-etching primer were applied for 20 seconds. The restorations were clinically evaluated at baseline, 6, 12 and 18 months, using modified Ryge/USPHS criteria. For both adhesives, very low retention of 50% to 56% of the restorations was observed over 18 months, leading to the conclusion that tooth surfaces must receive some additional treatment prior to restoration with these adhesives. No statistically significant difference (p=0.75) between the two adhesives was observed in overall performance, and dentinal sclerosis and axial depth did not appear to be important factors in the study MH - USA MH - Mexico|Puebla PB - INDIANAPOLIS: OPERATIVE DENTISTRY INC RP - NOT IN FILE U3 - TC 9 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0361-7734 UR - ISI:000230568600003 L2 - ADHESIVE SYSTEMS; COMPOSITE RESTORATIONS; SCLEROTIC DENTIN; BOND STRENGTH; ONE-STEP; LESIONS SO - Operative Dentistry 2005 ;30(4):424-429 13249 UI - 724 AU - Bradler K AD - Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoPalacky Univ, Dept Opt, Olomouc 77200, Czech RepublicBradler, K, Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20364, Mexico City 01000, DF, Mexico TI - Continuous-variable private quantum channel AB - In this paper we introduce the concept of quantum private channel within the continuous variables framework (CVPQC) and investigate its properties. In terms of CVPQC we naturally define a "maximally" mixed state in phase space together with its explicit construction and show that for increasing number of encryption operations (which sets the length of a shared key between Alice and Bob) the encrypted state is arbitrarily close to the maximally mixed state in the sense of the Hilbert-Schmidt distance. We bring the exact solution for the distance dependence and give also a rough estimate of the necessary number of bits of the shared secret key (i.e., how much classical resources are needed for an approximate encryption of a generally unknown continuous-variable state). The definition of the CVPQC is analyzed from the Holevo bound point of view which determines an upper bound of information about an incoming state an eavesdropper is able to get from his optimal measurement MH - Czech Republic MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Optics;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1050-2947 UR - ISI:000232931800047 L2 - STATES; COMMUNICATION; TELEPORTATION; INFORMATION; CLONING; THEOREM SO - Physical Review A 2005 ;72(4): 13250 UI - 194 AU - Bradt RC AU - guilar-Santillan J AU - Balmori-Ramirez H AD - Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487, USAUPALM, Inst Politecn Nacl, ESIQUE, Dept Met Engn, Mexico City 07300, DF, MexicoBradt, RC, Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487, USA TI - Nano-milling of the sillimanite mineral, kyanite, and its reactions with alumina to form mullite AB - The sillimanite group of minerals, kyanite, andalusite and sillimanite, the three polymorphs of Al2SiO4, is a natural raw material for the production of mullite in many traditional ceramics. However, the sillimanites form at high pressures and are alumina-deficient relative to mullite. This paper addresses the effects of attrition milling kyanite, the most common of the three to the nanoscale. Additions of aluminum metal, that is then oxidized to alumina and an independent addition of pure alumina to yield a phase-pure mullite after firing, are also described. The attrition milling size reduction of natural kyanite to the nanoscale has several pronounced beneficial effects. It reduces the phase decomposition temperature, it eliminates the large volume expansion of the decomposition and it produces a highly reactive form of the rejected silica. When fired with alumina additions adjusted to the mullite stoichiometry, the resulting phase-pure mullite is a high density, fine grain size ceramic body MH - Mexico|Distrito Federal MH - USA PB - SEOUL: KOREAN ASSOC CRYSTAL GROWTH, INC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Ceramics U5 - J;Article AV - English IS - 1229-9162 UR - ISI:000234562300001 L2 - attrition milling;kyanite;mullite;nanosize;sillimanite;EVOLUTION; CERAMICS SO - Journal of Ceramic Processing Research 2005 ;6(4):271-275 13251 UI - 901 AU - Bravo-Alfaro H AU - Coziol R AU - Brinks E AU - Baker AJ AU - Walter F AU - Kunth D AD - Univ Guanajuato, Dept Astron, Guanajuato, MexicoInst Nacl Astrofis Opt & Elect, Puebla, MexicoMax Planck Inst Extraterr Phys, D-85748 Garching, GermanyNatl Radio Astron Observ, Socorro, NM 87801, USAInst Astrophys, F-75014 Paris, FranceBravo-Alfaro, H, Univ Guanajuato, Dept Astron, Guanajuato, Mexico TI - HI, CO and near infrared observations of the BCD galaxy Haro 2 AB - The question about the triggering of starburst activity in Blue Compact Dwarf (BCD) galaxies is investigated. We obtained VLA H I imaging and a map of the CO(1-0) distribution obtained with the OVRO, millimeter array of the BCD Haro 2. In addition, we obtained infrared J and H images of the galaxy with the 2.1 m telescope of the Mexico National Optical Observatory (OAN), used to obtain surface brightness profiles. Based on these data we analyze the striking kinematics of Haro 2, revealed by the H I and CO, which show that the kinematical major axis lies nearly perpendicular to the photometric major axis. We conclude that this is the consequence of the capture of an important quantity of external gas produced by a close interaction with a neighbor galaxy MH - France MH - Germany MH - Mexico|Guanajuato MH - Mexico|Puebla MH - USA PB - MOLETAI: INST THEORETICAL PHYSICS ASTRONOMY RP - NOT IN FILE U3 - TC 0 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 1392-0049 UR - ISI:000232582100027 L2 - galaxies : dwarf, individual : Haro2;radio lines SO - Baltic Astronomy 2005 ;14(3):417-419 13252 UI - 974 AU - Bravo-Cuellar A AU - Gomez-Contreras PC AU - Lerma-Diaz JM AU - Hernandez-Flores G AU - Dominguez-Rodriguez JR AU - Ortiz-Lazareno P AU - Cervantes-Munguia R AU - Orbach-Arbouys S AD - IMSS, Ctr Invest Biomed Occidente, Guadalajara 44340, Jalisco, MexicoUniv Guadalajara, CUALTOS, Guadalajara 44430, Jalisco, MexicoHop Paul Brousse, Serv Pharm, Villejuif, FranceBravo-Cuellar, A, IMSS, Ctr Invest Biomed Occidente, Sierra Mojada 800,Col Independencia, Guadalajara 44340, Jalisco, Mexico TI - In vivo modification of adriamycin-induced apoptosis in L-5178Y lymphoma cell-bearing mice by (+)-alpha-tocopherol and superoxide dismutase AB - Apoptosis was followed in L5178Y lymphoma cell-bearing mice at different times after intraperitoneal injections of adriamycin (ADM). Apoptosis was determined morphologically and confirmed by DNA laddering on electrophoresis. Apoptosis was observed 36 h after injection of 5 mg/kg ADM (apoptotic cell index 64.2 +/- 5.6 vs. 1.5 +/- 2.1 from the untreated group) and confirmed by DNA electrophoresis. However, when the animals were pretreated with (+)-alpha-tocopherol acid succinate or superoxide dismutase before ADM administration apoptotic index significantly diminished (P < 0.05) and the DNA electrophoresis did not show fragmentations. We conclude that in ADM-treated mice, tumour cell death occurs in two ways: first by necrosis, then later by apoptosis. These observations are likely to be associated with or caused by the generation of reactive oxygen species. (C) 2005 Elsevier Ireland Ltd. All rights reserved MH - France MH - Mexico|Jalisco PB - CLARE: ELSEVIER IRELAND LTD RP - NOT IN FILE U3 - TC 1 U4 - Oncology U5 - J;Article AV - English IS - 0304-3835 UR - ISI:000232414500007 L2 - apoptosis;adriamycin;antioxidants;L-5178Y murine lymphoma;MECHANISMS; ANTIOXIDANT; INHIBITION; HEART SO - Cancer Letters 2005 ;229(1):59-65 13253 UI - 367 AU - Bravo J AU - Hervas R AU - Chavira G AD - Univ Castilla La Mancha, E-13071 Ciudad Real, SpainAutonomous Univ Tamaulipas, Tamaulipas, MexicoBravo, J, Univ Castilla La Mancha, E-13071 Ciudad Real, Spain TI - Ubiquitous Computing in the classroom: An approach through identification process AB - In recent years, there have been many efforts at research towards obtaining the simple and natural use of computers, with interfaces closer to the user. New visions such as that of the Ubiquitous Computing paradigm emerge. In Ubiquitous Computing the computer is distributed in a series of devices with reduced functionality, spread over the user's environment and communicating wirelessly. With these, context-aware applications are obtained. In this paper we present an approach to the classroom context by identification process using RFID technology, as an implicit input to the system. The main goal is to acquire natural interaction, because the only requirement for the user (teacher or student) is to carry a device (smart label), identifying and obtaining context services. Some of these services and the mechanisms that make them available are described here, together with a scenario of their use in the classroom MH - Mexico|Tamaulipas MH - Spain PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Computer Science, Software Engineering;Computer Science, Theory & Methods U5 - J;Article AV - English IS - 0948-695X UR - ISI:000233972600005 L2 - Ubiquitous Computing;RFID;implicit interaction;context aware SO - Journal of Universal Computer Science 2005 ;11(9):1494-1504 13254 UI - 80 AU - Breceda A AU - Ortiz V AU - Scrosati R AD - CIBNOR, La Paz 23090, BCS, MexicoSt Francis Xavier Univ, Dept Biol, Antigonish, NS B2G 2W5, CanadaBreceda, A, CIBNOR, Mar Bermejo 195,Col Playa Palo Santa Rita, La Paz 23090, BCS, Mexico TI - Mauto (Lysiloma divaricatum, fabaceae) allometry as an indicator of cattle grazing pressure in a tropical dry forest in northwestern Mexico AB - Mauto (Lysiloma divaricatum (Jacq.) J. F. Macbr.; Fabaceae) is a thornless, arborescent legume that is abundant in tropical dry forests in northwestern Mexico. To test whether mauto allometry may be used as an indicator of cattle grazing pressure, we compared plant height, canopy cover, and basal trunk diameter between an area where cattle had been excluded for 12 years with an area under continuous heavy cattle grazing. Mauro plants that had mostly avoided grazing grew to 12 in in height, with an average basal trunk diameter of 11 cm. Under intense grazing, many plants appeared as a bonsai, that is, as small pruned trees with a relatively thick trunk. Such differences were expressed in the linearized (log-log) slopes of the height-diameter and cover-diameter allometric relationships, which varied significantly between the grazed and ungrazed areas. Basal trunk diameter increased faster per unit increase in plant height and canopy cover in the grazed area than in the ungrazed area. Therefore, these morphological or allometric relationships of mauto could be useful for quickly assessing cattle grazing pressure in tropical dry forests MH - Canada MH - Mexico|Baja California Sur PB - LAKEWOOD: SOC RANGE MANAGEMENT RP - NOT IN FILE U3 - TC 1 U4 - Agriculture, Dairy & Animal Science;Ecology U5 - J;Article AV - English IS - 1550-7424 UR - ISI:000236150600011 L2 - forest grazing;Baja California Sur;Sierra La Laguna Biosphere Reserve;FRACTAL ARCHITECTURE; INSTABILITY; HEIGHT; SHRUB SO - Rangeland Ecology & Management 2005 ;58(1):85-88 13255 UI - 2399 AU - Breilh J AU - Branco JC AU - Castleman BI AU - Cherniack M AU - Christianti DC AU - Cicolella A AU - Cifuentes E AU - Clapp R AU - Cole DC AU - Corn M AU - De Ben S AU - Diaz R AU - Egilman D AU - Finkelstein Y AU - Franco G AU - Frank AL AU - Friedman L AU - Gassert TH AU - Gochfeld M AU - Greenberg M AU - Hansen ES AU - Hay A AU - Hogstedt C AU - Huff J AU - Joshi TK AU - Kriebel D AU - Laborde A AU - Ladou J AU - Levenstein C AU - Levin SM AU - Loewenson R AU - Mikheev M AU - Montenegro R AU - Naidoo M AU - Ozonoff D AU - Partanen T AU - Pendito RI AU - Povey G AU - Richter ED AU - Robbins A AU - Correa HR AU - Rosenman KD AU - Samuels SW AU - Santana VS AU - Schwartz BS AU - Siqueira CE AU - Soskolne CL AU - Spiegel J AU - Stephens C AU - Tajik M AU - Takaro TK AU - Teitelbaum DT AU - Tickner JA AU - Tomatis L AU - Victoria C AU - Waltner-Toews D AU - Wedeen RP AU - Wegman DH AU - Wesseling C AU - Wing S AU - Yassi A AD - Hlth Res & Advisory Ctr, Quito, EcuadorAssoc Occupat Dis & Prevent, Santos, BrazilUniv Connecticut, Ctr Hlth, Farmington, CT, USAHarvard Univ, Sch Publ Hlth, Boston, MA 02115, USAFrench Natl Inst Environm Risks, Verneuil En Halatte, FranceNatl Publ Hlth Inst, Cuernavaca, Morelos, MexicoBoston Univ, Sch Publ Hlth, Boston, MA 02118, USAUniv Toronto, Dept Publ Hlth Sci, Toronto, ON, CanadaJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Baltimore, MD, USAUniv Republica, Montevideo, UruguayColombian Safety Council, Bogota, ColombiaBrown Univ, Providence, RI 02912, USAShaare Zedek Mem Hosp, Jerusalem, IsraelUniv Modena, Sch Med, Occupat Hlth Unit, I-41100 Modena, ItalyDrexel Univ, Sch Publ Hlth, Philadelphia, PA 19104, USAUniv Med & Dent New Jersey, Robert Wood Johnson Med Sch, Newark, NJ 07103, USAUniv Copenhagen, Inst Publ Hlth, Copenhagen, DenmarkUniv Leeds, Leeds, W Yorkshire, EnglandNatl Publ Hlth Inst, Stockholm, SwedenNatl Inst Environm Hlth Sci, Res Triangle Pk, NC, USACtr Environm & Occupat Hlth, New Delhi, IndiaUniv Massachusetts, Sch Hlth & Environm, Amherst, MA 01003, USAUniv Calif San Francisco, Sch Med, San Francisco, CA 94143, USAUniv Massachusetts, Dept Work Environm, Lowell, MA, USAMt Sinai Sch Med, New York, NY, USAMed Acad Postgrad Studies, Dept Occupat Hlth, St Petersburg, RussiaBreilh, J, Hlth Res & Advisory Ctr, Quito, Ecuador TI - Texaco and its consultants MH - Brazil MH - Canada MH - Colombia MH - Denmark MH - Ecuador MH - United Kingdom MH - France MH - India MH - Israel MH - Italy MH - Mexico|Morelos MH - Russia MH - Sweden MH - Uruguay MH - USA PB - BURLINGTON: ABEL PUBLICATION SERVICES RP - NOT IN FILE U3 - TC 8 U4 - Public, Environmental & Occupational Health U5 - J;Letter AV - English IS - 1077-3525 UR - ISI:000228775200017 L2 - AMAZON BASIN; OIL-FIELDS; CANCER INCIDENCE; ECUADOR SO - International Journal of Occupational and Environmental Health 2005 ;11(2):217-220 13256 UI - 3537 AU - Brenes CH AU - del Pozo-Insfran D AU - Talcott ST AD - ITESM, Dept Food Technol, Monterrey 64849, NL, MexicoUniv Florida, Dept Food Sci & Human Nutr, Gainesville, FL 32611, USABrenes, CH, ITESM, Dept Food Technol, Campus Monterrey,E Garza Str 2501 Sur, Monterrey 64849, NL, Mexico TI - Stability of copigmented anthocyanins and ascorbic acid in a grape juice model system AB - The stability of red grape anthocyanins (Vitis vinifera) was evaluated in a model juice system during normal (25 degreesC) and accelerated storage (35 degreesC) in the presence of ascorbic acid. Rosemary polyphenolic cofactors (0, 0.2, and 0.4% v/v) were evaluated as anthocyanin stabilizing agents. Cofactor addition resulted in concentration-dependent hyperchromic (up to 178%) and bathochromic (up to 23 nm) shifts, indicating a more intense red coloration of the models. Anthocyanin and ascorbic acid degradation followed first-order kinetics during storage. Results showed that copigmented treatments underwent a lower conversion Of L-ascorbic acid into dehydroascorbic acid during storage when compared to the control, favorably impacting the vitamin retention of these models. Copigmentation did not affect anthocyanin degradation in the absence of ascorbic acid but in its presence aided to retain a higher anthocyanin content than the control. This study indicated that the addition of anthocyanin cofactors could be used to reduce the pigment and vitamin degradation while masking detrimental color changes in anthocyanin containing products MH - Mexico|Nuevo Leon MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 6 U4 - Agriculture, Multidisciplinary;Chemistry, Applied;Food Science & Technology U5 - J;Article AV - English IS - 0021-8561 UR - ISI:000226146500009 L2 - anthocyanins;copigmentation;ascorbic acid;dehydroascorbic acid;stability;SENSORY PROPERTIES; COLOR STABILITY; CONDENSATION; OXIDATION; FRUIT SO - Journal of Agricultural and Food Chemistry 2005 ;53(1):49-56 13257 UI - 111 AU - Bresme F AU - Gonzalez-Melchor M AU - Alejandre J AD - Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, EnglandUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoBresme, F, Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England TI - Influence of ion size asymmetry on the properties of ionic liquid-vapour interfaces AB - The influence of ion size asymmetry on the properties of ionic liquid-vapour interfaces is investigated using molecular dynamics simulations of the soft primitive model. Ion size asymmetry results in charge separation at the liquid-vapour interface and therefore in a local violation of the electroneutrality condition. For moderate size asymmetries the electrostatic potential at the interface can reach values of the order of 0.1 V. Size asymmetry plays a very important role in determining ion adsorption at the liquid-vapour interface of ionic mixtures. The interfacial adsorption of the bigger component results in an increase of the electrostatic potential, and a reduction of the interfacial surface tension. Our results show that ionic mixtures provide a very efficient way to tune the electrostatics and surface properties of ionic liquid-vapour interfaces MH - United Kingdom MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000235394200016 L2 - HARD-SPHERE MODEL; RESTRICTED PRIMITIVE MODEL; FLUID-SOLID EQUILIBRIUM; PHASE-EQUILIBRIA; DOUBLE-LAYER; ELECTROLYTES; SIMULATION SO - Journal of Physics-Condensed Matter 2005 ;17(45):S3301-S3307 13258 UI - 2517 AU - breu-Blaya R AU - Bory-Reyes J AU - Gerus OF AU - Shapiro M AD - IPN, ESFM, Dept Matemat, Mexico City 07338, DF, MexicoUniv Holguin, Fac Math & Informat, Holguin 80100, CubaUniv Oriente, Dept Math, Santiago De Cuba 90500, CubaZhitomir State Univ, UA-10008 Zhitomir, UkraineShapiro, M, IPN, ESFM, Dept Matemat, Mexico City 07338, DF, Mexico TI - The Clifford-Cauchy transform with a continuous density: N. Davydov's theorem AB - N. A. Davydov was among the first mathematicians who investigated the question of the continuity of the complex Cauchy transform along a non-smooth curve. In particular he proved that the Cauchy transform over an arbitrary closed, rectifiable Jordan curve can be continuously extended up to this curve from both sides if its density belongs to the Lipschitz class. In this paper we deal with higher dimensional analogue of Davydov's theorem within the framework of Clifford analysis. Copyright (c) 2005 John Wiley N Sons, Ltd MH - Cuba MH - Mexico|Distrito Federal MH - Ukraine PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 0170-4214 UR - ISI:000228511500004 L2 - Clifford analysis;Cauchy transform;multivector fields SO - Mathematical Methods in the Applied Sciences 2005 ;28(7):811-825 13259 UI - 3434 AU - Briones C AU - Manrubia SC AU - Lazaro E AU - Lazcano A AU - Amils R AD - Ctr Astrobiol, Madrid 28850, SpainUNAM, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Autonoma Madrid, Ctr Biol Mol Severo Ochoa, E-28049 Madrid, SpainBriones, C, Ctr Astrobiol, Carretera Ajalvir Km 4, Madrid 28850, Spain TI - Reconstructing evolutionary relationships from functional data: a consistent classification of organisms based on translation inhibition response AB - The last two decades have witnessed an unsurpassed effort aimed at reconstructing the history of life from the genetic information contained in extant organisms. The availability of many sequenced genomes has allowed the reconstruction of phylogenies from gene families and its comparison with traditional single-gene trees. However, the appearance of major discrepancies between both approaches questions whether horizontal gene transfer (HGT) has played a prominent role in shaping the topology of the Tree of Life. Recent attempts at solving this controversy and reaching a consensus tree combine molecular data with additional phylogenetic markers. Translation is a universal cellular function that involves a meaningful, highly conserved set of genes: both rRNA and r-protein operons have an undisputed phylogenetic value and rarely undergo HGT. Ribosomal function reflects the concerted expression of that genetic network and consequently yields information about the evolutionary paths followed by the organisms. Here we report on tree reconstruction using a measure of the performance of the ribosome: antibiotic sensitivity of protein synthesis. A large database has been used where 33 ribosomal systems belonging to the three major cellular lineages were probed against 38 protein synthesis inhibitors. Different definitions of distance between pairs of organisms have been explored, and the classical algorithm of bootstrap evaluation has been adapted to quantify the reliability of the reconstructions obtained. Our analysis returns a consistent phylogeny, where archaea are systematically affiliated to eukarya, in agreement with recent reconstructions which used information-processing systems. The integration of the information derived from relevant functional markers into current phylogenetic reconstructions might facilitate achieving a consensus Tree of Life. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000226258600010 L2 - phylogeny;rRNA trees;functional evolution;ribosomes;protein synthesis inhibitors;antibiotics;PROTEIN-SYNTHESIS INHIBITORS; PHYLOGENETIC ANALYSIS; RIBOSOMAL-RNA; GENOME TREES; BACTERIAL SYSTEMATICS; HALOPHILIC ARCHAEA; GENE-TRANSFER; SENSITIVITY; ARCHAEBACTERIA; EUKARYOTES SO - Molecular Phylogenetics and Evolution 2005 ;34(2):371-381 13260 UI - 746 AU - Brocos P AU - Gracia-Fadrique J AU - Amigo A AU - Pineiro A AD - Univ Nacl Autonoma Mexico, Fac Quim, Lab Termofis, Mexico City 04510, DF, MexicoUniv Santiago de Compostela, Fac Fis, Dept Fis Aplicada, E-15782 Santiago De Compostela, SpainUniv Nacl Autonoma Mexico, Fac Quim, Lab Superficies, Mexico City 04510, DF, MexicoPineiro, A, Univ Nacl Autonoma Mexico, Fac Quim, Lab Termofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Application of the Extended Langmuir model to surface tension data of binary liquid mixtures AB - By using literature surface tension data for a heterogeneous set of 110 binary liquid mixtures, it is shown how the analytical expression provided by the Extended Langmuir model is able to describe most of the different possible behaviours found, by means of just one or two adjustable parameters. For every system four plots, all of them providing complementary information to each other, are employed to discuss the parameters values obtained from the fitting of data, in terms of the two contributions considered by the model: the effect that heteromolecular interactions into the mixture have on the surface tension, and the prevalent adsorption of one compound to the surface phase. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Thermodynamics;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0378-3812 UR - ISI:000232973000018 L2 - surface tension;Extended Langmuir model;adsorption isotherm;binary mixture;unlike-pair interactions;REFRACTIVE-INDEXES; 298.15 K; VOLUMES; TETRAHYDROFURAN; CYCLODEXTRINS; CONSTANTS SO - Fluid Phase Equilibria 2005 ;237(1-2):140-151 13261 UI - 3572 AU - Brodie JD AU - Figueroa E AU - Laska EM AU - Dewey SL AD - NYU, Sch Med, Dept Psychiat, New York, NY 10016, USAClin Integral Tratamiento Adicc, Mexicali 21120, Baja California, MexicoNathan S Kline Inst Psychiat Res, Div Stat Sci & Epidemiol, Orangeburg, NY 10962, USABrookhaven Natl Lab, Dept Chem, Upton, NY 11973, USABrodie, JD, NYU, Sch Med, Dept Psychiat, 550 1St Ave, New York, NY 10016 USA TI - Safety and efficacy of gamma-vinyl GABA (GVG) for the treatment of methamphetamine and/or cocaine addiction AB - This study examined the safety and efficacy of gamma vinyl-GABA (GVG, vigabatrin) for the treatment of methamphetamine and/or cocaine addiction. A total of 30 subjects, who met DSM-IV criteria for methamphetamine and/or cocaine dependence, were enrolled in an open label 9-week safety study. The protocol was specifically designed to include extensive visual field monitoring as well as outcome measures of therapeutic efficacy. Patients were screened twice weekly for the presence of urinary cocaine, methamphetamine, heroin, alcohol, and marijuana. In total, 18/30 subjects completed the study and 16/18 tested negative for methamphetamine and cocaine during the last 6 weeks of the trial. GVG did not produce any visual field defects or alterations in visual acuity. Furthermore, it did not produce changes in vital signs even with continued use of methamphetamine and cocaine. Thus, under conditions that appear to be appropriate for the successful treatment of methamphetamine and/or cocaine addiction, GVG is safe. (C) 2004 Wiley-Liss, Inc MH - USA MH - Mexico|Baja California PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 24 U4 - Neurosciences U5 - J;Article AV - English IS - 0887-4476 UR - ISI:000225918700006 L2 - vigabatrin;methamphetamine;cocaine;treatment;addiction;NUCLEUS-ACCUMBENS DOPAMINE; INDUCED INCREASES; VIGABATRIN; RATS; EXPRESSION; BLOCKS; TRANSAMINASE; DEPENDENCE; INHIBITOR; STRATEGY SO - Synapse 2005 ;55(2):122-125 13262 UI - 2063 AU - Bronnikov KA AU - Michtchenko AV AD - VNIIMS, Moscow 117313, RussiaPFUR, Inst Gravitat & Cosmol, Moscow 117198, RussiaIPN, ESIME, SEPI, Mexico City 07738, DF, MexicoBronnikov, KA, VNIIMS, 3-1 M Ulyanovoy St, Moscow 117313, Russia TI - Black holes and wormholes in RS2 type brane worlds AB - We review some recent results concerning the properties of static, spherically symmetric configurations in RS2 type brane worlds: 1) Solving the trace of the effective 4D gravity equations, we obtain general classes of black hole and wormhole metrics, including families which unify symmetric wormholes, extremal black holes and non-extremal non-singular black holes. 2) Assuming E-mu(nu) = 0 (where E-mu(nu) is a part of the 5D Weyl tensor contributing to the 4D gravity equations), we show that material scalar fields confined on the brane may violate the no-hair theorem, support wormholes or form particlelike objects, but only at super-nuclear matter densities in the strong field region. 3) Solutions to the bulk field equations are found in case E-mu(nu) &3bond; 0, among them solutions with a nonzero 4D cosmological constant, generalizing the so-called "black string" MH - Mexico|Distrito Federal MH - Russia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000229549900007 L2 - multidimensional gravity;brane world;black holes;wormholes;scalar fields;NO-GO THEOREMS; HAIR; DIMENSIONS SO - International Journal of Modern Physics A 2005 ;20(11):2256-2264 13263 UI - 2814 AU - Brooks WS AU - Vaughn ME AU - Griffey CA AU - Price AM AU - Pridgen TH AU - Rohrer WL AU - Brann DE AU - Rucker EG AU - Behl HD AU - Sisson WL AU - Corbin RA AU - Kenner JC AU - Dunaway DW AU - Pitman RM AU - Premakumar R AU - Livingston DP AU - Vivar HE AU - Paris RL AD - Virginia Polytech Inst & State Univ, Dept Crop & Soil Environm Sci, Blacksburg, VA 24061, USAVirginia Polytech Inst & State Univ, E Virginia Agr Res & Extens Ctr, Warsaw, VA 22572, USAN Carolina State Univ, Dept Crop Sci, Plant Sci Unit, USDA ARS, Raleigh, NC 27695, USACIMMYT, ICARDA, Mexico City 06600, DF, MexicoUSDA ARS, Stoneville, MS 38776, USAGriffey, CA, Virginia Polytech Inst & State Univ, Dept Crop & Soil Environm Sci, Blacksburg, VA 24061 USA TI - Registration of 'Doyce' hulless barley MH - Mexico|Distrito Federal MH - USA PB - MADISON: CROP SCIENCE SOC AMER RP - NOT IN FILE U3 - TC 0 U4 - Agronomy U5 - J;Article AV - English IS - 0011-183X UR - ISI:000227602700059 SO - Crop Science 2005 ;45(2):792-793 13264 UI - 1286 AU - Brostow W AU - Castano VM AU - Martinez-Barrera G AD - Univ N Texas, Lab Adv Polymers & Optimized Mat, Dept Mat Sci & Engn, Denton, TX 76203, USAUniv Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76001, Qro, MexicoUniv Nacl Autonoma Mexico, LIDMA, Fac Quim, Toluca 50000, Estado De Mexic, ThailandMartinez-Barrera, G, Univ N Texas, Lab Adv Polymers & Optimized Mat, Dept Mat Sci & Engn, Denton, TX 76203 USA TI - Gamma irradiation effect on polystyrene plus SBR blends: morphology and microhardness AB - Blends with 0, 5, 10 and 13 weight % of styrene/butadiene (SBR) copolymer embedded in a rigid polystyrene matrix were prepared. Micro-hardness was determined and morphology evaluated by scanning electron microscopy (SEM) before and after gamma irradiation. We relate the morphology to chemical structure and to composition of the SBRs as well as to irradiation dosages. We also connect the microhardness to the impact strength determined previously MH - Mexico|Queretaro MH - Thailand MH - USA PB - WARSAW: INDUSTRIAL CHEMISTRY RESEARCH INST RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-2725 UR - ISI:000231512200004 L2 - polymer blends;polystyrene;SBR;microhardness;impact behavior;gamma irradiation;SEM;surface morphology;PARTICLE-SIZE; BLOCK; HIPS SO - Polimery 2005 ;50(9):657-662 13265 UI - 1905 AU - Brostow W AU - Keselman M AU - Mironi-Harpaz I AU - Narkis M AU - Peirce R AD - Univ N Texas, Dept Mat Sci & Engn, Lab Adv Polymers & Optimized Mat, Denton, TX 76203, USANatl Autonomous Univ Mexico, CFATA, Queretaro 76000, MexicoTechnion Israel Inst Technol, Dept Chem Engn, IL-32000 Haifa, IsraelBrostow, W, Univ N Texas, Dept Mat Sci & Engn, Lab Adv Polymers & Optimized Mat, Denton, TX 76203 USA TI - Effects of carbon black on tribology of blends of poly(vinylidene fluoride) with irradiated and non-irradiated ultrahigh molecular weight polyethylene AB - Friction and wear resistance are two vital tribological properties of polymer-based materials but optimization of both is rarely attempted. We have investigated blends of 70 wt% poly(vinylidene fluoride) (PVDF) + 30% ultra high molecular weight polyethylene, the latter either un-irradiated or else gamma-irradiated. Each sample contained varying amounts of carbon black (CB) and also had a varied degree of crosslinking and irradiation dose. We have determined static and dynamic friction, scratch resistance, and sliding wear in multiple scratching tests. Effects of the irradiation dose and CB concentration have been quantified. The electric conductivity threshold is reflected in a drop of static friction; formation of a continuous phase of the lubricant affects tribology as well as electrical properties-both for irradiated and for un-irradiated samples. The scratch resistance as represented by the residual (healing) depth is affected by crosslinking, by the stage at which irradiation is applied (before or after blending) and by CB addition. Crosslinking by moderate amounts of irradiation provides shallower residual depths while higher doses cause adverse results. Similarly, the CB lubricant can either improve or worsen the scratch resistance. A combination of both approaches produces either better or else worse results than crosslinking alone. Lower friction seems accompanied by higher scratch resistance. A combination of a specific irradiation dose and an optimized CB concentration lowers the sliding wear significantly. Strain hardening in sliding wear determination takes place for all materials studied, irrespective of the extent or radiation-induced crosslinking and of the presence and concentration of carbon black. (c) 2005 Elsevier Ltd. All rights reserved MH - Israel MH - Mexico|Queretaro MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 5 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000229945500010 L2 - polymer friction;polymer sliding wear;scratch resistance;SWITCHING MATERIALS; BEHAVIOR; EPOXY SO - Polymer 2005 ;46(14):5058-5064 13266 UI - 81 AU - Brower LP AU - Fink LS AU - Ramirez LR AU - Weiss SB AU - Slayback D AU - Perault DR AD - Sweet Briar Coll, Sweet Briar, VA 24595, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoNASA, Goddard Space Flight Ctr, Creekside Ctr Earth Observat, Greenbelt, MD 20771, USALynchburg Coll, Lynchburg, VA 24501, USA TI - The physiological ecology of overwintering monarch butterflies MH - Mexico|Distrito Federal MH - USA PB - CARY: OXFORD UNIV PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Meeting Abstract AV - English IS - 1540-7063 UR - ISI:000235337600065 SO - Integrative and Comparative Biology 2005 ;45(6):970-970 13267 UI - 2034 AU - Brown AGA AU - Velazquez HM AU - Aguilar LA AD - Sterrewacht Leiden, NL-2300 RA Leiden, NetherlandsUNAM, Inst Astron, Baja California 22800, MexicoBrown, AGA, Sterrewacht Leiden, Pob 9513, NL-2300 RA Leiden, Netherlands TI - Detection of satellite remnants in the Galactic Halo with Gaia - I. The effect of the Galactic background, observational errors and sampling AB - We address the problem of identifying remnants of satellite galaxies in the halo of our galaxy with Gaia data. The Gaia astrometric mission offers a unique opportunity to search for and study these remnants using full phase-space information for the halo of our Galaxy. However, the remnants have to be extracted from a very large data set (of the order of 109 stars) in the presence of observational errors and against a background population of Galactic stars. We address this issue through numerical simulations with a view towards timely preparations for the scientific exploitation of the Gaia data. We present a Monte Carlo simulation of the Gaia catalogue with a realistic number of entries. We use a model of the galaxy that includes separate light distributions and kinematics for the bulge, disc and stellar halo components. For practical reasons we exclude the region within Galactic coordinates: -90 degrees <= l <= 90 degrees and -5 degrees <= b <= 5 degrees, close to the Galactic plane and centre. Nevertheless, our catalogue contains 3.5 x 10(8) stars. No interstellar absorption has been modelled, as we limit our study to high Galactic latitudes. We perform tree code 10(6)-body simulations of satellite dwarf galaxies in orbit around a rigid mass model of the Galaxy. We follow the simulations for 10(10) yr. The resulting shrinking satellite cores and tidal tails are then added to the Monte Carlo simulation of the Gaia catalogue. To assign photometric properties to the particles we use a Hess diagram for the Solar neighbourhood for Galactic particles, while for the dwarf galaxy particles we use isochrones from the Padova group. When combining the Milky Way and dwarf galaxy models we include the complication that the luminosity function of the satellite is probed at various depths as a function of position along the tidal tails. The combined Galaxy and satellites model is converted to a synthetic Gaia catalogue using a detailed model for the expected astrometric and radial velocity errors, depending on magnitude, colour and sky position of the stars. We explore the feasibility of detecting tidal streams in the halo using the energy versus angular momentum plane. We find that a straightforward search in this plane will be very challenging. The combination of the background population and the observational errors will make it difficult to detect tidal streams as discrete structures in the E-L-z plane. In addition the propagation of observational errors leads to apparent caustic structures in the integrals of motion space that may be mistaken for physical entities. Any practical search strategy will have to use a combination of pre-selection of high-quality data and complementary searches using the photometric data that will be provided by Gaia MH - Mexico|Baja California MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 1 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000229640600008 L2 - methods : numerical;Galaxy : formation;Galaxy : structure;galaxies : interactions;DWARF SPHEROIDAL GALAXY; DARK-MATTER HALOES; MILKY-WAY; SINKING SATELLITES; GIANT STARS; GLOBULAR-CLUSTERS; SAGITTARIUS; SUBSTRUCTURE; UNIVERSE; STELLAR SO - Monthly Notices of the Royal Astronomical Society 2005 ;359(4):1287-1305 13268 UI - 2686 AU - Brown CJ AU - Pagan JA AU - Rodriguez-Oreggia E AD - Univ Texas, Dept Econ & Finance, Edinburgh 78541, Midlothian, ScotlandUniv Penn, Robert Wood Johnson Hlth & Soc Scholars Program, Philadelphia, PA 19104, USASecretaria Desarrollo Social, Mexico City 06600, DF, MexicoITESM, Mexico City 01389, DF, MexicoPagan, JA, Univ Texas, Dept Econ & Finance, 1201 W Univ Dr, Edinburgh 78541, Midlothian, Scotland TI - The decision-making process of health care utilization in Mexico AB - Using individual-level data from the 2000 Mexican Survey of Satisfaction with Health Services we estimate a two-part negative binomial hurdle model to evaluate the decision-making process of health care utilization in Mexico. We find that there are income-related differences in utilization associated with the first visit to a physician, as well as substantial utilization differences by region, employment, insurance and financial status. There are also income-related differences in the first visit to a specialist but not in the number of days hospitalized. The results suggest that increasing initial access to services via income and insurance coverage and providing financial resources to underserved regions can substantially improve access to care and, ultimately, population health. (c) 2004 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Distrito Federal MH - United Kingdom MH - USA PB - CLARE: ELSEVIER SCI IRELAND LTD RP - NOT IN FILE U3 - TC 1 U4 - Health Care Sciences & Services;Health Policy & Services U5 - J;Article AV - English IS - 0168-8510 UR - ISI:000228035300008 L2 - health care utilization;decision-making process;Mexico;MODELS SO - Health Policy 2005 ;72(1):81-91 13269 UI - 2776 AU - Broza G AU - Castano VM AU - Martinez-Barrera G AU - Menard KP AU - Simoes C AD - Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203, USANatl Autonoma Estado Mexico, Posgrado Fac Quim, Toulca 50000, Estrado Mexico, MexicoUniv Nacl Autonoma Mexico, CFATA, Queretaro 76001, Qro, MexicoTech Univ Hamburg, Polymer Composites Sect, D-21073 Hamburg, GermanyMenard, KP, Univ N Texas, Dept Mat Sci & Engn, LAPOM, Denton, TX 76203 USA TI - P-V-T properties of a polymer liquid crystal subjected to pre-drawing at several temperatures AB - We have studied the copolymer of poly(ethylene terephthalate) (PET) with 0.6 mole fraction of p-hydroxybenzoic acid (PHB). It is a longitudinal polymer liquid crystal (PLC). A number of otherwise identical samples were subjected to drawing to achieve in turn 20%, 40%, 60%, 80% and 100% increase in length. The drawing was performed isothermally at 60, 100 and 140 degrees C. Pressure-volume-temperature (P-V-T) results have been obtained for pressures up to 200 J cm(-3) and temperatures up to 150 degrees C or so. Parameters of the Hartmann equation of state have been evaluated. Drawing first results in an increase in specific (and also free) volume, then in a decrease caused by increased orientation of the PLC, and finally in an apparent increase caused by the appearance of voids. The tensile modulus E has been determined for all pre-drawn samples. It reflects the volumetric changes a rebours: the initial increase in specific volume results in lower E values, orientation in E increase, and void formation in a second decrease. (c) 2005 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Estado De Mexico MH - Mexico|Queretaro MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-4526 UR - ISI:000227746700036 L2 - polymer liquid crystals;PLC;P-V-T relationships;pre-drawing;free volume;SHIFT FACTOR; EQUATION; STATE; ORIENTATION; STRESS; PERFORMANCE; PRESSURES; BEHAVIOR SO - Physica B-Condensed Matter 2005 ;357(3-4):500-506 13270 UI - 1995 AU - Bryk P AU - Pizio O AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Dept Modeling Physicochem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBryk, P, Marie Curie Sklodowska Univ, Dept Modeling Physicochem Proc, PL-20031 Lublin, Poland TI - Capillary condensation of short-chain molecules AB - A density-functional study of capillary condensation of fluids of short-chain molecules confined to slitlike pores is presented. The molecules are modeled as freely jointed tangent spherical segments with a hard core and with short-range attractive interaction between all the segments. We investigate how the critical parameters of capillary condensation of the fluid change when the pore width decreases and eventually becomes smaller than the nominal linear dimension of the single-chain molecule. We find that the dependence of critical parameters for a fluid of dimers and of tetramers on pore width is similar to that of the monomer fluid. On the other hand, for a fluid of chains consisting of a larger number of segments we observe an inversion effect. Namely, the critical temperature of capillary condensation decreases with increasing pore width for a certain interval of values of the pore width.. This anomalous behavior is also influenced by the interaction between molecules and pore walls. We attribute this behavior to the effect of conformational changes of molecules upon confinement. (c) 2005 American Institute of Physics MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 13 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000229743500060 L2 - DENSITY-FUNCTIONAL THEORY; MONTE-CARLO SIMULATIONS; FUNDAMENTAL-MEASURE-THEORY; HARD-SPHERE MIXTURES; VAN-DER-WAALS; PHASE-TRANSITIONS; KELVIN EQUATION; LATTICE-GAS; N-ALKANES; ADSORPTION-ISOTHERMS SO - Journal of Chemical Physics 2005 ;122(19): 13271 UI - 2164 AU - Bryk P AU - Pizio O AU - Sokolowski S AD - Marie Curie Sklodowska Univ, Fac Chem, Dept Modelling Phys Chem Proc, PL-20031 Lublin, PolandUniv Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoBryk, P, Marie Curie Sklodowska Univ, Fac Chem, Dept Modelling Phys Chem Proc, PL-20031 Lublin, Poland TI - Density functional theory of adsorption of mixtures of charged chain particles and spherical counterions AB - We propose a microscopic density functional theory to describe nonuniform ionic fluids composed of chain molecules with charged "heads" and spherical counterions. The chain molecules are modeled as freely jointed chains of hard spheres, the counterions are oppositely charged spheres of the same diameter as all segments of chain molecules. The theory is based on the approach of Yu and Wu [J. Chem. Phys. 117, 2368 (2002)] of adsorption of chain molecules and on theory of adsorption of electrolytes [O. Pizio, A. Patrykiejew, and S. Sokolowski, J. Chem. Phys. 121, 11957 (2004)]. As an application of the proposed formalism we investigate the structure and adsorption of fluids containing segments of different length in a slitlike pore. (c) 2005 American Institute of Physics MH - Mexico|Distrito Federal MH - Poland PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 7 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000229064600054 SO - Journal of Chemical Physics 2005 ;122(17): 13272 UI - 181 AU - Bryson RW AU - Smith HM AU - Lemos-Espinal J AD - San Antonio Zoo, Dept Herpetol, San Antonio, TX 78212, USAUniv Colorado, Dept Ecol & Evolut Biol, Boulder, CO 80309, USAUNAM, Fac Estudios Super Iztacala, UBIPRO, Ecol Lab, Mexico City 54090, DF, MexicoBryson, RW, San Antonio Zoo, Dept Herpetol, 3903 N St Marys St, San Antonio, TX 78212 USA TI - Taxonomic status of the madrean alligator lizard (Lacertilia : Anguidae) of the Sierra del Nido, Chihuahua, Mexico AB - New evidence is presented that suggests that the single specimen of Elgaria usafa from the Sierra del Nido in Chihuahua is all aberrantly patterned E. kingii. We suggest that E. usafa be considered a junior synonym of E. kingii MH - Mexico|Distrito Federal MH - USA PB - SAN MARCOS: SOUTHWESTERN ASSN NATURALISTS RP - NOT IN FILE U3 - TC 0 U4 - Biodiversity Conservation;Ecology U5 - J;Article AV - English IS - 0038-4909 UR - ISI:000234496100015 SO - Southwestern Naturalist 2005 ;50(4):497-498 13273 UI - 1869 AU - Bryson RW AU - Dixon JR AU - Lazcano D AD - Sul Ross State Univ, Dept Biol, Alpine, TX 79832, USATexas A&M Univ, Texas Cooperat Wildlife Collect, College Stn, TX 77843, USAUniv Autonoma Nuevo Leon, Lab Herpetol, Nuevo Leon 66450, MexicoBryson, RW, 113 Walnut St 97, Neptune, NJ 07753, USA TI - New species of Lampropeltis (Serpentes : Colubridae) from the Sierra Madre Occidental, Mexico AB - We describe a new species of Lampropeltis from the Pacific versant of the Sierra Madre Occidental in western Mexico based on external morphology, scutellation, and molecular data. This species appears to be closely related to Lampropeltis pyromelana and Lampropeltis mexicana. Divergence may have resulted from geographic isolation on the west side of the Continental Divide in the Sierra Madre Occidental and subsequent adaptation to a unique ecological region MH - Mexico|Nuevo Leon MH - USA PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000230153200005 L2 - MITOCHONDRIAL-DNA; DIVERGENCE; PROTEINS SO - Journal of Herpetology 2005 ;39(2):207-214 13274 UI - 3258 AU - Bucardo F AU - Meza-Lucas A AU - Espinoza F AU - Garcia-Jeronimo RC AU - Garcia-Rodea R AU - Correa D AD - Inst Nacl Pediat, Secretaria Salud, Subdirect Med Expt, Mexico City 04530, DF, MexicoUniv Nacl Autonoma Nicaragua UNAN Leon, Dept Microbiol & Parasitol, Leon, NicaraguaInst Diagnost & Referencia Epidemiol, Secretaria Salud, Mexico City 11340, DF, MexicoCorrea, D, Inst Nacl Pediat, Secretaria Salud, Subdirect Med Expt, Ave Insurgentes Sur 3700-C,Colonia Insurgentes Cu, Mexico City 04530, DF, Mexico TI - The seroprevalence of Taenia solium cysticercosis among epileptic patients in Leon, Nicaragua, as evaluated by ELISA and western blotting AB - The Taenia solium taeniasis/ cysticercosis complex is an important public- health problem in several countries, where many epileptic seizures appear to be associated with neurocysticercosis. As few data on this problem in Nicaragua exist, the seroprevalence of antibodies reacting with antigens from T. solium cysticerci was investigated among 88 Nicaraguan epileptics ( 45 males and 43 females, aged 6 - 53 years). In questionnaire- based interviews, each adult subject and a caregiver of each child investigated were asked about potential risk factors for taeniasis/ cysticercosis. When a serum sample from each subject was then checked for anti- cysticercus antibodies, 8.0% of the subjects were found seropositive by ELISA and 14.8% by western blotting. Five samples ( all from individuals who had been epileptic for > 5 years) were positive in both tests. When the level of association between each potential risk factor and seropositivity ( in ELISA or by blotting) was evaluated, the only statistically significant association detected was that between a positive ELISA and the subject living in a household where pigs were raised ( odds ratio= 5.18; 95% confidence interval= 0.8 - 41.6; P= 0.05). The bands most frequently recognized in the western blots ( of 50, 42 - 39, 24 and 14 kDa) were those previously reported. The results indicate that, in the city of Leon, cysticercosis may be endemic and the cause of a significant proportion of the epilepsy recorded MH - Mexico|Distrito Federal MH - Nicaragua PB - LEEDS: MANEY PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Public, Environmental & Occupational Health;Parasitology;Tropical Medicine U5 - J;Article AV - English IS - 0003-4983 UR - ISI:000226691600006 L2 - NEUROCYSTICERCOSIS; ASSAY SO - Annals of Tropical Medicine and Parasitology 2005 ;99(1):41-45 13275 UI - 1333 AU - Bucardo J AU - Brouwer KC AU - Magis-Rodriguez C AU - Ramos R AU - Fraga M AU - Perez SG AU - Patterson TL AU - Strathdee SA AD - Univ Calif San Diego, Sch Med, Dept Family & Prevent Med, La Jolla, CA 92093, USAUniv Calif San Diego, Sch Med, Dept Psychiat, La Jolla, CA 92093, USACENSIDA, Natl Ctr Prevent & Control HIV AIDS, Mexico City, DF, MexicoUnited States Mexico Border Hlth Assoc, El Paso, TX 79912, USACompaneros Int, Programa Companeros, Chihuahua 32330, MexicoUniv Autonoma Baja California, Tijuana Sch Med, Tijuana 22390, MexicoBrouwer, KC, Univ Calif San Diego, Sch Med, Dept Family & Prevent Med, 9500 Gilman Dr,MC 0622, La Jolla, CA 92093 USA TI - Historical trends in the production and consumption of illicit drugs in Mexico: Implications for the prevention of blood borne infections AB - Mexico has cultivated opium poppy since before the 1900's and has been an important transit route for South American cocaine for decades. However, only recently has drug use, particularly injection drug use, been documented as an important problem. Heroin is the most common drug used by Mexican injection drug users (IDUs). Increased cultivation of opium poppy in some Mexican states, lower prices for black tar heroin and increased security at U.S.-Mexican border crossings may be contributing factors to heroin use, especially in border cities. Risky practices among IDUs, including needle sharing and shooting gallery attendance are common, whereas perceived risk for acquiring blood home infections is low. Although reported AIDS cases attributed to IDU in Mexico have been low, data from sentinel populations, such as pregnant women in the Mexican-U.S. border city of Tijuana, suggest an increase in HIV prevalence associated with drug use. Given widespread risk behaviors and rising numbers of blood home infections among IDUs in Mexican-U.S. border cities, there is an urgent need for increased disease surveillance and culturally appropriate interventions to prevent potential epidemics of blood home infections. We review available literature on the history of opium production in Mexico, recent trends in drug use and its implications, and the Mexican response, with special emphasis on the border cities of Ciudad Juarez and Tijuana. (c) 2005 Published by Elsevier Ireland Ltd MH - USA MH - Mexico|Chihuahua MH - Mexico|Distrito Federal MH - Mexico|Baja California PB - CLARE: ELSEVIER IRELAND LTD RP - NOT IN FILE U3 - TC 14 U4 - Substance Abuse;Psychiatry U5 - J;Review AV - English IS - 0376-8716 UR - ISI:000231628500001 L2 - injection drug use;opium;heroin;drug treatment;needle exchange programs;harm reduction;interdiction;Mexico;SYRINGE EXCHANGE; HIV-INFECTION; USERS; AIDS; TRANSMISSION; REDUCTION; BEHAVIORS; COUNTRIES; PROSPECTS; PROGRAMS SO - Drug and Alcohol Dependence 2005 ;79(3):281-293 13276 UI - 580 AU - Buchy MC AU - Smith KT AU - Frey E AU - Stinnesbeck W AU - Gonzalez AHG AU - Ifrim C AU - Lopez-Oliva JG AU - Porras-Muzquiz H AD - Staat Museum Nat, Geowissenschaft Abt, D-76133 Karlsruhe, GermanyUniv Karlsruhe, Inst Geol, D-76128 Karlsruhe, GermanyYale Univ, Dept Geol & Geophys, New Haven, CT 06520, USAMuseo Desierto, Saltillo, Coahuila, MexicoUniv Autonoma Nuevo Leon, Fac Ciencias Tierra, Linares, Nuevo Leon, MexicoMuseo Hist Muzquiz, Muzquiz, Coahiula, MexicoBuchy, MC, Staat Museum Nat, Geowissenschaft Abt, Erbprinzenstr 13, D-76133 Karlsruhe, Germany TI - Annotated catalogue of marine squamates (Reptilia) from the Upper Cretaceous of northeastern Mexico AB - Recent work in the Upper Cretaceous of northeastern Mexico has produced a diversity of vertebrate remains. For specimens referable to Squamata, both old and new, an annotated catalogue is here provided, wherein are summarised the geological context and morphological features of each specimen. All specimens appear to represent marine squamates, including an aigiatosaur-like reptile preserving integumentary structures, several vertebrae possibly representing mosasauroids, the first Mexican mosasaur known from significant cranial material, an isolated mosasaur mandibular fragment, and the holotype of Amphekepubis johnsoni (considered to belong to Mosasourus). These discoveries are auspicious and should deepen our understanding of palaeobiogeographic and evolutionary patterns MH - Germany MH - Mexico|Coahuila MH - Mexico|Nuevo Leon MH - USA PB - EDE: VEENMAN DRUKKERS RP - NOT IN FILE U3 - TC 4 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0016-7746 UR - ISI:000233216700005 L2 - Mosasauridae;Aigialosauridae;Upper Cretaceous;Mexico;catalogue;MOROCCO; FISH; REDESCRIPTION; TELEOSTEI; DEPOSITS; AGE SO - Netherlands Journal of Geosciences-Geologie en Mijnbouw 2005 ;84(3):195-205 13277 UI - 1251 AU - Bucio E AU - Burillo G AU - Adem E AU - Coqueret X AD - Univ Sci & Tech Lille Flandres Artois, CNRS, UMR 8009, Lab Chim Organ & Macromol, F-59655 Villeneuve Dascq, FranceUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoBurillo, G, Univ Sci & Tech Lille Flandres Artois, CNRS, UMR 8009, Lab Chim Organ & Macromol, F-59655 Villeneuve Dascq, France TI - Temperature sensitive behavior of poly(N-isopropylacrylamide) grafted onto electron beam-irradiated poly(propylene) AB - N-Isopropylacrylamide (NIPAAm) was graft polymerized from its acetone solution onto poly(propylene) (PP) films, after electron beam irradiation in the presence of air oxygen. The effects of pre-irradiation dose as well as monomer concentration reaction temperature and reaction time on the grafting efficiency were investigated. Typical conditions for achieving maximum grafting yield were observed for 1 M monomer concentration, after PP pre-irradiation with a 300 kGy dose and a reaction temperature of 50 degrees C. The location of the graft polymerization was examined by the different methods including measurements of dimensional variations, calorimetry, SEM and AFM. The temperature-responsive behaviour of grafted copolymer was studied by swelling and contact angle measurements at different temperatures MH - France MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Polymer Science U5 - J;Article AV - English IS - 1438-7492 UR - ISI:000231694800001 L2 - electron beam irradiation;graft copolymers;hydrophilic polymers;poly(propylene) (PP);swelling;POLY N-ISOPROPYLACRYLAMIDE; ACRYLIC-ACID; ALPHA-CHYMOTRYPSIN; GEL BEADS; COPOLYMERS; HYDROGELS; IMMOBILIZATION; POLYMERIZATION; PH SO - Macromolecular Materials and Engineering 2005 ;290(8):745-752 13278 UI - 2090 AU - Bucio E AU - Fitch JW AU - Venumbaka SR AU - Cassidy PE AD - SW Texas State Univ, Shell Ctr Polymer Sci & Technol, San Marcos, TX 78666, USASW Texas State Univ, Inst Environm & Ind Sci, San Marcos, TX 78666, USABucio, E, Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Synthesis and properties of aliphatic spirodilactam diphenol containing polyesters AB - A series of aromatic polyesters containing 1,6-diazaspiro[4,4]-nonane-2,7-dione were synthesized under phase-transfer conditions. The copolymers were obtained in essentially quantitative yield, theses were soluble in common organic solvents, and would readily form clear, colorless films from solution. The optimum conditions of polymerization, was obtained via polycondensation at room temperature and reaction time of 4 h in chloroform. All polymers were characterized by FTIR, GPC, viscosity, water contact angle, water absorption, TGA, DSC and TMA. The prepared polyesters showed excellent thermal stability, as measured by TGA (10 wt% loss), are only moderate due to the alicyclic component and range from 365 to 401 &DEG; C in air; however, glass transition temperatures are quite high (245-309 &DEG; C). The inherent viscosities of these solutions ranged from 0.77 to 1.40 dl g(-1), depending on the polyester structure. The structures of the polyesters were confirmed by FTIR spectroscopy. © 2005 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - USA PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0032-3861 UR - ISI:000229598400002 L2 - polyester;synthesis;interfacial polymerization;HEXAFLUOROACETONE; POLYCONDENSATION; POLYARYLATES; BISPHENOLS SO - Polymer 2005 ;46(12):3971-3974 13279 UI - 488 AU - Buelga DS AU - de Gatta MDF AU - Herrera EV AU - Dominguez-Gil A AU - Garcia MJ AD - Univ Salamanca, Dept Pharm & Pharmaceut Technol, Salamanca 37001, SpainUniv Autonoma Puebla, Fach Chem Sci, Puebla 72570, MexicoUniv Hosp, Serv Pharm, Salamanca, SpainGarcia, MJ, Univ Salamanca, Dept Pharm & Pharmaceut Technol, Campus Unamuno, Salamanca 37001, Spain TI - Population pharmacokinetic analysis of vancomycin in patients with hematological malignancies AB - This study determines vancomycin (VAN) population pharmacokinetics (PK) in adult patients with hematological malignancies. VAN serum concentration data (n = 1,004) from therapeutic drug monitoring were collected retrospectively from 215 patients. A one-compartment PK model was selected. VAN pharmacokinetics population parameters were generated using the NONMEM program. A graphic approach and stepwise generalized additive modeling were used to elucidate the preliminary relationships between PK parameters and clinical covariates analyzed. Covariate selection revealed that total body weight (TBW) affected V, whereas renal function, estimated by creatinine clearance, and a diagnosis of acute myeloblastic leukemia (AML) influenced VAN clearance. We propose one general and two AML-specific models. The former was defined by CL (liters/h) = 1.08 x CLCR(Cockcroft and Gault) (liters/h); CVCL = 28.16% and V(fiters) = 0.98 x TBW; CVV = 37.15%. AML models confirmed this structure but with a higher clearance coefficient (1.17). The a priori performance of the models was evaluated in another 59 patients, and clinical suitability was confirmed. The models were fairly accurate, with more than 33% of the measured concentrations being within +/- 20% of the predicted value. This therapeutic precision is twofold higher than that of a noncustomized population model (16.1%). The corresponding standardized prediction errors included zero and a standard deviation close to unity. The models could be used to estimate appropriate VAN dosage guidelines, which are not clearly defined for this high-risk population. Their simple structure should allow easy implementation in clinical software and application in dosage individualization using the Bayesian approach MH - Mexico|Puebla MH - Spain PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 1 U4 - Microbiology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0066-4804 UR - ISI:000233692100014 L2 - CREATININE CLEARANCE; BAYESIAN METHOD; RENAL-FUNCTION; FEBRILE NEUTROPENIA; DOSAGE REQUIREMENTS; SERUM CREATININE; PREDICTION; AMIKACIN; THERAPY; CANCER SO - Antimicrobial Agents and Chemotherapy 2005 ;49(12):4934-4941 13280 UI - 1785 AU - Buelna G AU - Nenoff TM AD - Sandia Natl Labs, Chem & Biol Technol Dept, Albuquerque, NM 87185, USAUniv Autonoma Tamaulipas, Fac Enfermeria Nuevo Laredo Pino Suarez & Aldama, Mexico City 88000, DF, MexicoNenoff, TM, Sandia Natl Labs, Chem & Biol Technol Dept, POB 5800,MS 0734, Albuquerque, NM 87185 USA TI - A one-step catalytic separation process for the production of cumene AB - A novel reactor design has been completed and tested for catalytic separation and production of cumene. Use of a reactive separation column packed with a solid acid catalyst where simultaneous reaction and partial separation occur during cumene production allows separation of unreacted excess benzene from other products as they form. This high yielding system allows for one step processing of cumene, with reduced need for product purification. Beta catalysts produced promising results, including cumene selectivity for catalytic separation reactions starting at 85% and cumene reaction yield up to 30% at a reaction temperature of 115 degrees C. Simultaneously, up to 76% of unreacted benzene was separated from the products MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 1011-372X UR - ISI:000230515600030 L2 - benzene alkylation;catalytic distillation;cumene;reactive separation;REACTIVE DISTILLATION; BENZENE; ALKYLATION; BEHAVIOR; ZEOLITE SO - Catalysis Letters 2005 ;102(3-4):285-288 13281 UI - 934 AU - Bueno-Ibarra MA AU - varez-Borrego J AU - Acho L AU - Chavez-Sanchez MC AD - IPN, CITEDI, San Diego, CA, USACICESE, Direcc Telemat, Ensenada 22860, Baja California, MexicoCtr Invest Alimentac & Desarrollo AC, Unidad Mazatlan Acuicultura & Manejo Ambiental, Mazatlan Sinaloa 82010, MexicoBueno-Ibarra, MA, IPN, CITEDI, 2498 Roll Dr 757, San Diego, CA, USA TI - Fast autofocus algorithm for automated microscopes AB - We present a new algorithm to determine, quickly and accurately, the best-in-focus image of biological particles. The algorithm is based on a one-dimensional Fourier transform and on the Pearson correlation for automated microscopes along the Z axis. We captured a set of several images at different Z distances from a biological sample. The algorithm uses the Fourier transform to obtain and extract the image frequency content of a vector pattern previously specified to be sought in each captured image; comparing these frequency vectors with the frequency vector of a reference image (usually the first image that we capture or the most out-of-focus image), we find the best-in-focus image via the Pearson correlation. Numerical experimental results show the algorithm has a fast response for finding the best-in-focus image among the captured images, compared with related autofocus techniques presented in the past. The algorithm can be implemented in real-time systems with fast response, accuracy, and robustness; it can be used to get focused images in bright and dark fields; and it offers the prospect of being extended to include fusion techniques to construct multifocus final images. (c) 2005 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Mexico|Sinaloa MH - USA PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000232590900016 L2 - automated microscope;focus algorithms;autofocusing;variance analysis;gradient filters;Fourier transform;Pearson correlation SO - Optical Engineering 2005 ;44(6): 13282 UI - 3071 AU - Bueno E AU - Gomez-Hernandez N AU - Girard L AU - Bedmar EJ AU - Delgado MJ AD - CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, Granada 18080, SpainUNAM, Ctr Invest Fijac Nitrogeno, Cuernavaca 62271, Morelos, MexicoDelgado, MJ, CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbioticos, POB 419, Granada 18080, Spain TI - Function of the Rhizobium etli CFN42 nirK gene in nitrite metabolism AB - Rhizobium etli CFN42 is not capable of growing anaerobically with nitrate but it grows with nitrite as a terminal electron acceptor. This bacterium contains the nirK gene encoding the copper-containing Nir (nitrite reductase), which is located on the cryptic plasmid pCFN42f. Mutational analysis has demonstrated that a nirK deficient mutant was not capable of growing under nitrite-respiring conditions. Moreover, microaerobic growth of this mutant was inhibited by the presence of nitrite. Nir activity and nitrite uptake were highly diminished in a nirK mutant, compared with the wild-type levels after incubation under anaerobic conditions. our results suggest that the copper-containing Nir may have both a respiratory and a nitrite-detoxifying role in R. etli MH - Mexico|Morelos MH - Spain PB - LONDON: PORTLAND PRESS LTD RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0300-5127 UR - ISI:000227269800047 L2 - anaerobiosis;denitrification;detoxification;nitrite reduction;respiratory nitrite reductase;Rhizobium etli;BRADYRHIZOBIUM-JAPONICUM; SYMBIOTIC PLASMID; REDUCTASE; PHASEOLI; NITRATE SO - Biochemical Society Transactions 2005 ;33():162-163 13283 UI - 663 AU - Bueno MA AU - varez-Borrego J AU - Acho L AU - Chavez-Sanchez MC AD - IPN, CITEDI, San Diego, CA, USACICESE, Direcc Telemat, Ensenada 22860, Baja California, MexicoCtr Invest Alimentac & Desarrollo AC, Unidad Mazatlan Acuicultura & Manejo Ambiental, Mazatlan 82010, Sinaloa, MexicoBueno, MA, IPN, CITEDI, 2498 Roll Dr 757, San Diego, CA, USA TI - Polychromatic image fusion algorithm and fusion metric for automatized microscopes AB - We propose a new algorithm to determine the multifocus image fusion from several polychromatic images captured from the best focusing region where the best in focus image is included from a biological sample. This focusing region is built by including several images up and down starting from the Z position of the best image in focus. These captured RGB images are converted to YCbCr color space to have the color CbCr and intensity Y channels separated with the objective to preserve the color information of the best in focus image. Several approaches have been developed to fuse images, like those algorithms based on the wavelets transform, Laplacian, ratio, contrast or morphological pyramids selection, fusion by averaging, Bayesian methods, fuzzy sets, and artificial networks. However, this algorithm utilizes the Fourier approach by using the Y channel frequency content via analyzing the Fourier coefficients to retrieve the high frequencies to obtain the best possible characteristics of every captured image. After the completion of this process, we continue to construct the fused image with these coefficients and color information for the optimum in focus image in the YCbCr color space; as a result, we obtain a precise final RGB fused image. (c) 2005 Society of Photo-Optical Instrumentation Engineers MH - Mexico|Baja California MH - Mexico|Sinaloa MH - USA PB - BELLINGHAM: SPIE-INT SOCIETY OPTICAL ENGINEERING RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0091-3286 UR - ISI:000233094700008 L2 - automatized microscope;fusion algorithms;multifocus image fusion;YCbCr color space;Fourier transform;fusion metrics;fusion quality measures;AUTOFOCUS-ALGORITHMS SO - Optical Engineering 2005 ;44(9): 13284 UI - 2401 AU - Bugeaud Y AU - Luca F AD - Univ Strasbourg 1, UFR Math, F-67084 Strasbourg, FranceUniv Nacl Autonoma Mexico, Inst Matemat, Morelia 58180, Michoacan, MexicoBugeaud, Y, Univ Strasbourg 1, UFR Math, 7 Rue Rene Descartes, F-67084 Strasbourg, France TI - On the period of the continued fraction expansion of root 2(2n+1)+1 AB - We prove a general result which implies that the period of the continued fraction expansion of &RADIC; 2(2n+1) + 1 tends to infinity when n tends to infinity MH - France MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Mathematics U5 - J;Article AV - English IS - 0019-3577 UR - ISI:000228937900002 L2 - SUBSPACE THEOREM; EQUATIONS SO - Indagationes Mathematicae-New Series 2005 ;16(1):21-35 13285 UI - 2773 AU - Bugeaud Y AU - Luca F AU - Mignotte A AU - Siksek S AD - Univ Strasbourg 1, UFR Math, F-67084 Strasbourg, FranceUNAM, Inst Matemat, Morelia 58089, Michoacan, MexicoSultan Qaboos Univ, Coll Sci, Dept Math & Stat, Muscat, OmanBugeaud, Y, Univ Strasbourg 1, UFR Math, 7,Rue Rene Descartes, F-67084 Strasbourg, France TI - On Fibonacci numbers with few prime divisors AB - If n is a positive integer, write F-n for the nth Fibonacci number, and w(n) for the number of distinct prime divisors of n. We give a description of Fibonacci numbers satisfying w(F-n) <= 2. Moreover, we prove that the inequality w(F-n) >= (log n)(log 2+o(1)) holds for almost all n. We conjecture that w(F-n) >> log n for composite n, and give a heuristic argument in support of this conjecture MH - France MH - Mexico|Michoacan MH - Oman PB - TOKYO: JAPAN ACAD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0386-2194 UR - ISI:000227732100001 L2 - Fibonacci numbers;arithmetic functions;prime divisors SO - Proceedings of the Japan Academy Series A-Mathematical Sciences 2005 ;81(2):17-20 13286 UI - 2037 AU - Buhariwalla HK AU - Jarret RL AU - Jayashree B AU - Crouch JH AU - Ortiz R AD - Int Crops Res Inst Semi Arid Trop, MS Swaminathan Genom Lab, Patancheru 502324, Andhra Pradesh, IndiaARS, Plant Genet Resources Unit, USDA, Griffin, GA 30223, USACIMMYT, Mexico City 06600, DF, MexicoBuhariwalla, HK, Int Crops Res Inst Semi Arid Trop, MS Swaminathan Genom Lab, Patancheru 502324, Andhra Pradesh, India TI - Isolation and characterization of microsatellite markers from Musa balbisiana AB - This is the first report of targeted development of B genome microsatellite markers in Musa. A total of 44 sequences with microsatellites were isolated from an enriched library of Musa balbisiana cv. 'Tani' (BB genome). Of these, 25 were polymorphic when screened on 14 diverse diploid and triploid Musa accessions. The number of alleles detected by each marker ranged between one and seven. All 25 microsatellite markers generated amplification products in all species and genome complements. These new microsatellite markers fill an important gap for diversity assessment and linkage mapping studies in plantain (AAB) and cooking banana (ABB) MH - India MH - Mexico|Distrito Federal MH - USA PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Ecology;Evolutionary Biology U5 - J;Article AV - English IS - 1471-8278 UR - ISI:000229691300040 L2 - B genome;microsatellite;Musa;polymorphism;polyploid SO - Molecular Ecology Notes 2005 ;5(2):327-330 13287 UI - 1478 AU - Bukovsky A AU - Caudle MR AU - Svetlikova M AU - Wimalasena J AU - Ayala ME AU - Dominguez R AD - Univ Tennessee, Grad Sch Med, Lab Dev Differentiat & Canc, Knoxville, TN 37920, USAUniv Tennessee, Grad Sch Med, Dept Obstet & Gynecol, Knoxville, TN 37920, USAUniv Tennessee, Grad Sch Med, Knoxville, TN 37920, USAUNAM, Lab Biol Reprod, Fac Estudios Prof, Mexico City, DF, MexicoBukovsky, A, Univ Tennessee, Grad Sch Med, Lab Dev Differentiat & Canc, Knoxville, TN 37920 USA TI - Oogenesis in adult mammals, including humans AB - The origin of oocytes and primary follicles in ovaries of adult mammalian females has been a matter of dispute for over 100 yr. The prevailing belief that all oocytes in adult mammalian females must persist from the fetal period of life seems to be a uniquely retrogressive reproductive mechanism requiring humans to preserve their gametes from the fetal period for several decades. The utilization of modern techniques during last 10 yr clearly demonstrates that mammalian primordial germ cells originate from somatic cell precursors. This indicates that if somatic cells are precursors of germ cells, then somatic mutations can be passed on to progeny. Mitotically active germline stem cells have been described earlier in ovaries of adult prosimian primates and recently have been reported to also be present in the ovaries of adult mice. We have earlier shown that in adult human females, mesenchymal cells in the ovarian tunica albuginea undergo a mesenchymal-epithelial transition into ovarian surface epithelium cells, which differentiate sequentially into primitive granulosa and germ cells. Recently, we have reported that these structures assemble in the deeper ovarian cortex and form new follicles to replace earlier primary follicles undergoing atresia (follicular renewal). Our current observations also indicate that follicular renewal exists in rat ovaries, and human oocytes can differentiate from ovarian surface epithelium in fetal ovaries in vivo and from adult ovaries in vitro. These reports challenge the established dogma regarding the fetal origin of eggs and primary follicles in adult mammalian ovaries. Our data indicate that the pool of primary follicles in adult human ovaries does not represent a static but a dynamic population of differentiating and regressing structures. Yet, the follicullar renewal may cease at a certain age, and this may predetermine the onset of the natural menopause or premature ovarian failure. A lack of follicullar renewal in aging ovaries may cause an accumulation of spontaneously arising or environmentally induced genetic alterations of oocytes, and that may be why aging females have a much higher chance of having oocytes with more mutations in persisting primary follicles MH - Mexico|Distrito Federal MH - USA PB - TOTOWA: HUMANA PRESS INC RP - NOT IN FILE U3 - TC 10 U4 - Endocrinology & Metabolism U5 - J;Review AV - English IS - 0969-711X UR - ISI:000231075900016 L2 - oogenesis;ovary;adult;mammals;human;OVARIAN SURFACE EPITHELIUM; NONSPECIFIC ALKALINE-PHOSPHATASE; PRIMORDIAL GERM-CELLS; EMBRYONIC STEM-CELLS; TRANSMISSION ELECTRON-MICROSCOPY; EXPRESSED CARBOHYDRATE ANTIGEN; HUMAN CORPORA-LUTEA; MOUSE EMBRYO; SEXUAL-MATURITY; RETE OVARII SO - Endocrine 2005 ;26(3):301-316 13288 UI - 3607 AU - Bullock SH AU - Martijena NE AU - Webb RH AU - Turner RM AD - Ctr Invest Cient & Educ Super Ensenada, Dept Biol Conservat, Ensenada 22800, Baja California, MexicoUS Geol Survey, Tucson, AZ, USABullock, SH, Ctr Invest Cient & Educ Super Ensenada, Dept Biol Conservat, Apartado Postal 2732, Ensenada 22800, Baja California, Mexico TI - Twentieth century demographic changes in cirio and cardon in Baja California, Mexico AB - Aim Our purpose was to discern long-term large-scale patterns of survivorship and recruitment of two dominant, charismatic and useful desert plants, cirio [Fouquieriaceae; Fouquieria columnaris (Kell.) Kell. ex Curran] and cardon [Cactaceae; Pachycereus pringlei (S.Watson) Britton & Rose], and to evaluate the effects of physical and human factors. Location The study included 77 sites distributed over c. 13,200 km(2) in the northern Vizcaino Region of the Sonoran Desert, state of Baja California, Mexico. Method Censuses used identified individuals (n = 3780 cirio and 2246 cardon) and were based on repeat photography. Time intervals between censuses ranged from 29 to 96 years, ending in 1996-2002. Earlier repetition (1963) of old photographs at 14 sites allowed analysis of temporal variation. The effect of elapsed time was modelled with Weibull functions for survivorship and linear functions for recruitment. To explain the residual variations, we tested categorical and continuous variables related to substrate, geomorphology, climate and geography. Human impacts were weighed with historical and quantitative analysis. Results Elapsed time accounted for 45% of the variation of survivorship in cirio but only 35% in cardon. The fitted Weibull curves were used to estimate longevity: all-size cohorts of 1000 individuals would die out in 388 (cirio) and 723 years (cardon). Recruitment in cirio was linearly related to time (r(2) = 0.71) and averaged < 0.003 year(-1) but was less than mortality at 90% of the sites. For cardon, recruitment averaged > 0.005 year(-1), was linearly related to time (r(2) = 0.66) and was less than mortality at only 33% of the sites. Vital rates were not strongly correlated between mid- and late-century but were mostly similar to the long-term regional rates. Removing the factor of elapsed time, the residual variations showed that survivorship was greater on sites protected from winds for cirio and was less on very coarse soils for cardon. Recruitment increased with latitude in cirio and was greater on southern exposures for both species. The residual variations were not clearly affected, at a regional scale, by other factors thought to be important, including elevation, distance to the Pacific Ocean, geology, slope gradient, soil stability, older vs. young alluvial soils, and soil Ca : Mg and Na : K ratios. Human impacts have been sporadic and heterogeneous but locally strong; our quantitative indices of accessibility did not show regionally significant effects. Blowdown by hurricanes is a sporadic cause of major mortality for cirio but not necessarily for cardon. Main conclusions At our scales, effects of time outweigh those of substrate, and human impact was scant. Large patterns were pronounced: cirio experienced a prolonged, widespread decline in the 1900s, while cardon fluctuated in different directions and degree among local populations. Cirio was found to be inherently much shorter-lived than cardon. We also suggest that recruitment in cirio was low due to long periods with relatively dry winters that affected the entire region, while spatial heterogeneity of cardon recruitment seemed more related to the variation in summer rains MH - Mexico|Baja California MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Geography, Physical U5 - J;Review AV - English IS - 0305-0270 UR - ISI:000225951900012 L2 - climatic variability;demography;Fouquieria;human impact;hurricanes;landscape;metapopulation;Pachycereus;Sonoran Desert;substrate;SONORAN DESERT; PACHYCEREUS-PRINGLEI; VEGETATION CHANGE; SOUTHERN ARIZONA; GROWTH-RATES; PATTERNS; PLANTS; SOILS; BIOMECHANICS; SUCCULENTS SO - Journal of Biogeography 2005 ;32(1):127-143 13289 UI - 489 AU - Burchard EG AU - Borrell LN AU - Choudhry S AU - Naqvi M AU - Tsai HJ AU - Rodriguez-Santana JR AU - Chapela R AU - Rogers SD AU - Mei R AU - Rodriguez-Cintron W AU - Arena JF AU - Kittles R AU - Perez-Stable EJ AU - Ziv E AU - Risch N AD - Univ Calif San Francisco, Dept Med, Div Pulm & Crit Care, San Francisco, CA 94143, USAUniv Calif San Francisco, Dept Med, Div Clin Pharmacol, San Francisco, CA 94143, USAUniv Calif San Francisco, Dept Biopharmaceut Sci, Div Pharmaceut Sci & Pharmacogenet, San Francisco, CA 94143, USAUniv Calif San Francisco, Ctr Human Genet, San Francisco, CA 94143, USAUniv Calif San Francisco, Med Effectiveness Res Ctr Dis Populat, San Francisco, CA 94143, USAColumbia Univ, Sch Dent & Oral Surg, New York, NY, USAColumbia Univ, Mailman Sch Publ Hlth, Dept Epidemiol, New York, NY, USAPediat Pulm Program San Juan, San Juan, PR, USAInst Nacl Enfermedades Resp, Mexico City, DF, MexicoNCI, Epidemiol & Genet Res Program, Div Canc Control & Populat Sci, Bethesda, MD 20892, USAAffymetrix Inc, Santa Clara, CA, USAUniv Puerto Rico, Sch Med, Vet Affairs Med Ctr, San Juan, PR 00936, USAOhio State Univ, Ctr Comprehens Canc, Columbus, OH 43210, USAUniv Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143, USAKaiser Permanente Med Ctr, Div Res, Oakland, CA 94611, USABurchard, EG, Univ Calif San Francisco, Dept Med, Div Pulm & Crit Care, San Francisco, CA 94143 USA TI - Latino populations: A unique opportunity for the study of race, genetics, and social environment in epidemiological research AB - Latinos are the largest minority population in the United States. Although usually classified as a single ethnic group by researchers, Latinos are heterogeneous from cultural, socioeconomic, and genetic perspectives. From a cultural and social perspective, Latinos represent a wide variety of national origins and ethnic and cultural groups, with a full spectrum of social class. From a genetic perspective, Latinos are descended from indigenous American, European, and African populations. We review the historical events that led to the formation of contemporary Latino populations and use results from recent genetic and clinical studies to illustrate the unique opportunity Latino groups offer for studying the interaction between racial, genetic, and environmental contributions to disease occurrence and drug response MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER PUBLIC HEALTH ASSOC INC RP - NOT IN FILE U3 - TC 19 U4 - Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0090-0036 UR - ISI:000233656000016 L2 - PUERTO-RICAN; MEXICAN-AMERICANS; HISPANIC PARADOX; RISK-FACTOR; ASTHMA; HEALTH; MORTALITY; ADMIXTURE; ASSOCIATION; LOCI SO - American Journal of Public Health 2005 ;95(12):2161-2168 13290 UI - 2338 AU - Burgos JE AD - Univ Guadalajara, Ctr Estudios & Invest Comportamiento, Guadalajara 45030, Jalisco, MexicoBurgos, JE, POB PMB 30-189,413 Interamer Blvd,WH1, Laredo, TX 78045, USA TI - Theoretical note: the C/T ratio in artificial neural networks AB - This paper describes computer simulations of the effect of the C/T ratio on acquisition rate in artificial neural networks. The networks consisted of neural processing elements that functioned according to a neurocomputational model whose learning rule is consistent with information on dopaminergic mechanisms of reinforcement. In Simulation 1, three comparisons were made: constant C and variable T, variable C and constant T, and a constant C/T with variable C and T. In the last two comparisons, C was manipulated by changing the probability of reinforcement within the intertrial interval (ITI), in the absence of the conditioned stimulus (CS). Acquisition rate tended to increase with C/T, and the invariant ratio had no effect. In Simulation 2, C was manipulated by changing the 171, with continuous reinforcement in the presence of the CS and no reinforcements in its absence. Results were comparable to those obtained in Simulation 1. Simulation 3 further explored the effect of the invariant ratio, but with larger absolute Values of C and T, which slowed acquisition significantly. The results parallel some experimental findings and theoretical implications of the Gibbon-Balsam model, showing that they can emerge from the moment-to-moment dynamics of a neural-network model. In contrast to that model, however, Simulation 3 suggests that the effect of invariant C/T ratios may be bounded. © 2005 Elsevier B.V. All rights reserved MH - Mexico|Jalisco MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Psychology, Biological;Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0376-6357 UR - ISI:000228963800020 L2 - C/T ratio;neural networks;NICTITATING-MEMBRANE RESPONSE; CS-US INTERVAL; INTERSTIMULUS-INTERVAL; INTERTRIAL DURATIONS; BEHAVIOR ANALYSIS; CONDITIONED SUPPRESSION; RABBIT; TRIAL; ACQUISITION; VARIABLES SO - Behavioural Processes 2005 ;69(2):249-256 13291 UI - 697 AU - Burneo JG AU - Tellez-Zenteno J AU - Wiebe S AD - Univ Western Ontario, Epilepsy Programme, London Hlth Sci Ctr, London, ON, CanadaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Calgary, Dept Clin Neurosci, Calgary, AB, Canada TI - Childhood epilepsy in Latin-American: A systematic review of its prevalence MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Clinical Neurology U5 - J;Meeting Abstract AV - English IS - 0013-9580 UR - ISI:000231885302221 SO - Epilepsia 2005 ;46():386-386 13292 UI - 821 AU - Burneo JG AU - Tellez-Zenteno J AU - Wiebe S AD - Univ Western Ontario, Epilepsy Programme, Dept Clin Neurol Sci, London Hlth Sci Ctr, London, ON N6A 5A5, CanadaInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, MexicoUniv Calgary, Dept Clin Neurosci, Calgary, AB, CanadaBurneo, JG, Univ Western Ontario, Epilepsy Programme, Dept Clin Neurol Sci, London Hlth Sci Ctr, 339 Windermere Rd, London, ON N6A 5A5, Canada TI - Understanding the burden of epilepsy in Latin America: A systematic review of its prevalence and incidence AB - Rationale: Epilepsy is the most common serious neurological condition in the world, and an important cause of mortality and disability in developing countries. Because epidemiological and clinical characteristics of epilepsy vary by region, it is important to know the peculiarities of epilepsy in this area of the American continent. Methods: We searched MEDLINE, IMBIOMED, and LILACS (The Latin-American and Caribbean biomedical database) to identify community-based studies reporting on the prevalence and incidence of epilepsy in Latin America. Studies were included if a definition of epilepsy was given, if data were obtained through standardized questionnaires and if raw population numbers were available for data confirmation. Results: Thirty-three studies fulfilled eligibility criteria, 32 reported on prevalence and three on incidence of epilepsy. The median lifetime prevalence in all countries was 17.8 (range 6-43.2) per 1000 people, and the range for incidence was 77.7-190 per 100,000 people per year. There were no differences between rural and urban areas, by gender, age-group (children, adult, all ages), ascertainment method, or year of study. Conclusions: Measuring the global burden of disease in Latin America requires adequate epidemiological information. This systematic review of epidemiological studies identifies higher prevalence and incidence rates of epilepsy in the general population of Latin America than in northern hemisphere countries. The remarkable heterogeneity found between and even within countries, could be explained by several factors, importantly, socioeconomic and methodological aspects. (c) 2005 Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 10 U4 - Clinical Neurology U5 - J;Article AV - English IS - 0920-1211 UR - ISI:000232916500006 L2 - epilepsy;incidence;prevalence;Latin America;systematic review;DEVELOPING-COUNTRIES; URBAN-COMMUNITY; POPULATION; EPIDEMIOLOGY; SEIZURES; ECUADOR; BRAZIL; NEUROCYSTICERCOSIS; DISORDERS; COLOMBIA SO - Epilepsy Research 2005 ;66(1-3):63-74 13293 UI - 2380 AU - Burnstein RA AU - Chakravorty A AU - Chan A AU - Chen YC AU - Choong WS AU - Clark K AU - Dukes EC AU - Durandet C AU - Felix J AU - Fuzesy R AU - Gidal G AU - Gu P AU - Gustafson HR AU - Ho C AU - Holmstrom T AU - Huang M AU - James C AU - Jenkins CM AU - Jones TD AU - Kaplan DM AU - Lederman LM AU - Leros N AU - Longo MJ AU - Lopez F AU - Lu LC AU - Luebke W AU - Luk KB AU - Nelson KS AU - Park HK AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Teng PK AU - Turko B AU - Volk J AU - White CG AU - White SL AU - Zyla P AD - Univ Virginia, Charlottesville, VA 22904, USAIIT, Chicago, IL 60616, USAAcad Sinica, Taipei 11529, TaiwanUniv Calif Berkeley, Berkeley, CA 94720, USAUniv S Alabama, Mobile, AL 36688, USAUniv Guanajuato, Leon 37000, MexicoLawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Michigan, Ann Arbor, MI 48109, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Lausanne, CH-1015 Lausanne, SwitzerlandDukes, EC, Univ Virginia, Charlottesville, VA 22904, USA TI - HyperCP: A high-rate spectrometer for the study of charged hyperon and kaon decays AB - The HyperCP experiment (Fermilab E871) was designed to search for rare phenomena in the decays of charged strange particles, in particular CP violation in Xi and Lambda hyperon decays with a sensitivity of 10(-4). Intense charged secondary beams were produced by 800 GeV/c protons and momentum selected by a magnetic channel. Decay products were detected in a large-acceptance, high-rate magnetic spectrometer using multiwire proportional chambers, trigger hodoscopes, a hadronic calorimeter, and a muon-detection system. Nearly identical acceptances and efficiencies for hyperons and antihyperons decaying within an evacuated volume were achieved by reversing the polarities of the channel and spectrometer magnets. A high-rate data-acquisition system enabled 231 billion events to be recorded in 12 months of data-taking. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000228837800004 L2 - HyperCP;magnetic spectrometer;hadronic calorimeter;hyperon CP violation;rare hyperon and kaon decays;fermilab;DATA-ACQUISITION-SYSTEM; DATA COMPACTOR; CP-VIOLATION; FIFO; HEP SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2005 ;541(3):516-565 13294 UI - 2963 AU - Burriel M AU - Garcia G AU - Santiso J AU - Abrutis A AU - Saltyte Z AU - Figueras A AD - CSIC, Lab Crystal Growth, ICMAB, E-08193 Bellaterra, SpainVilnius State Univ, Dept Gen & Inorgan Chem, LT-2006 Vilnius, LithuaniaInst Fis, Queretaro 76230, MexicoBurriel, M, CSIC, Lab Crystal Growth, ICMAB, Campus UAB, E-08193 Bellaterra, Spain TI - Growth kinetics, composition, and morphology of CO3O4 thin films prepared by pulsed liquid-injection MOCVD AB - Cobalt oxide films were grown by pulsed liquid injection MOCVD using Co(thd)(2) dissolved in monoglyme as the precursor. The structure, morphology, and growth rate of the layers deposited on silicon substrates were studied as a function of solution concentration, deposition temperature, and oxygen partial pressure. X-ray diffraction (XRD) of films deposited from 350 degreesC to 540 degreesC showed a pure Co3O4 spinel structure and no COO was detected, even at the lowest oxygen pressure. X-ray photoelectron spectroscopy (XPS) was used to study the surface composition and oxidation states. Surprisingly, XPS spectra recorded for most of the films seemed to correspond to CoO. This unexpected oxidation state on the surface was assigned to the effect of the high density of edges and corners present in the surface morphology MH - Lithuania MH - Mexico|Queretaro MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Electrochemistry;Materials Science, Coatings & Films;Physics, Condensed Matter U5 - J;Article AV - English IS - 0948-1907 UR - ISI:000227434700005 L2 - cobalt oxides;liquid-injection MOCVD;thin films;CHEMICAL-VAPOR-DEPOSITION; COBALT OXIDE-FILMS; CATALYTIC-PROPERTIES; OXYGEN EVOLUTION; LOW-TEMPERATURE; LOW-PRESSURE; PRECURSORS; SURFACE; COO; MICROSTRUCTURE SO - Chemical Vapor Deposition 2005 ;11(2):106-111 13295 UI - 3571 AU - Burriel M AU - Garcia G AU - Santiso J AU - Hansson AN AU - Linderoth S AU - Figueras A AD - CSIC, ICMAB, Lab Crystal Growth, Bellaterra 08193, SpainRiso Natl Lab, Mat Res Dept, DK-4000 Roskilde, DenmarkInst Fis, Juriquilla 76230, Queretaro, MexicoGarcia, G, CSIC, ICMAB, Lab Crystal Growth, Campus UAB, Bellaterra 08193, Spain TI - CO3O4 protective coatings prepared by Pulsed Injection Metal Organic Chemical Vapour Deposition AB - Cobalt oxide films were grown by Pulsed Injection Metal Organic Chemical Vapour Deposition (PI-MOCVD) using Co(acac)(3) (acac=acetylacetonate) precursor dissolved in toluene. The structure, morphology and growth rate of the layers deposited on silicon substrates were studied as a function of deposition temperature. Pure Co3O4 spinel structure was found for deposition temperatures ranging from 360 to 540 degreesC. The optimum experimental parameters to prepare dense layers with a high growth rate were determined and used to prepare corrosion protective coatings for Fe-22Cr metallic interconnects, to be used in Intermediate Temperature Solid Oxide Fuel Cells. (C) 2004 Elsevier B.V. All rights reserved MH - Denmark MH - Mexico|Queretaro MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 7 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000225749000016 L2 - MOCVD;cobalt oxide;deposition process;XRD;coatings;COBALT OXIDE-FILMS; THIN-FILMS; LOW-TEMPERATURE; LOW-PRESSURE; FUEL-CELLS; MOCVD; GROWTH; MICROSTRUCTURE; PRECURSORS; OXIDATION SO - Thin Solid Films 2005 ;473(1):98-103 13296 UI - 2915 AU - Bursik M AU - Patra A AU - Pitman EB AU - Nichita C AU - Macias JL AU - Saucedo R AU - Girina O AD - SUNY Buffalo, Buffalo, NY 14260, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoRussian Acad Sci, Inst Volcan Geol & Geochem, Pereopavlovsk Kamshatski, RussiaBursik, M, SUNY Buffalo, Buffalo, NY 14260, USA TI - Advances in studies of dense volcanic granular flows AB - The collapse and decrepitation of a lava dome at the summit of a volcano generally results in the generation of dense granular flows, often referred to as block and ash flows. As the dome particles propagate from the source, they break apart by internal pressure as well as collision. The propagation of block and ash flows can be simulated to some accuracy with a depth averaged numerical model of the equations of continuity and momentum for a material with a frictional resistance. However, important features of such flows, such as the influence of remote stress through force chains, erosion of the volcano substrate, and shock formation and pressurization upon particle break up are poorly understood. In the near future, the influence of these factors will be incorporated into depth averaged models. Various numerical techniques based on particles will-some day yield results that can be compared not only with bulk flow properties, but to the internal layering of block and ash flow deposits MH - Mexico|Distrito Federal MH - Russia MH - USA PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Physics, Multidisciplinary U5 - J;Review AV - English IS - 0034-4885 UR - ISI:000227399100001 L2 - MOUNT-ST-HELENS; PYROCLASTIC FLOWS; UNZEN VOLCANO; SEDIMENT GRAINS; DE-COLIMA; ASH FLOWS; AVALANCHES; MODEL; ERUPTION; JAPAN SO - Reports on Progress in Physics 2005 ;68(2):271-301 13297 UI - 283 AU - Burt JL AU - Elechiguerra JL AU - Reyes-Gasga J AU - Montejano-Carrizales JM AU - Jose-Yacaman M AD - Univ Texas, Ctr Nano & Mol Sci & Technol, Texas Mat Inst, Dept Chem Engn, Austin, TX 78712, USAUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, MexicoJose-Yacaman, M, Univ Texas, Ctr Nano & Mol Sci & Technol, Texas Mat Inst, Dept Chem Engn, Austin, TX 78712 USA TI - Beyond Archimedean solids: Star polyhedral gold nanocrystals AB - We report star polyhedral gold nanocrystals synthesized by colloidal reduction with ascorbic acid in water at ambient conditions. We identify two distinct classes of star nanocrystals: multiple-twinned crystals with fivefold symmetry, and monocrystals. These respective classes correspond to icosahedra and cuboctahedra, two Archimedian solids, with preferential growth of their {111} surfaces. Due to this preferential growth, the {111} faces of the original Archimedean solids grow to become tetrahedral pyramids, the base of each pyramid being the original polyhedral face. By assuming a star morphology, gold nanocrystals increase their proportion of exposed {111} surfaces, which possess the lowest surface energy among low-index crystallographic planes for FCC crystals. Thus, we propose that the driving force for star nanocrystal formation Could be the reduction in surface energy that the crystals experience. Interestingly, icosahedrally derived star nanocrystals possess a geometric morphology closely resembling the great stellated dodecahedron, a Kepler-Poinsot solid. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000234164600034 L2 - nanocrystal morphology;nanostructures;star nanocrystals;CHEMICAL-SYNTHESIS; ASPECT-RATIO; NANORODS; NANOPARTICLES; PARTICLES; NANOWIRES; GROWTH; SHAPES SO - Journal of Crystal Growth 2005 ;285(4):681-691 13298 UI - 2327 AU - Buscaldi D AU - Rosso P AU - Gomez MMY AD - Univ Genoa, Dipartimento Informat & Sci Informaz, Genoa, Italy. Polytech Univ, DSIC, Valencia, Spain. Inst Nacl Astrofis Opt & Elect, Lab Tecnol Lenguaje, Mexico City, DF, Mexico TI - Context expansion with global keywords for a conceptual density-based WSD AB - The resolution of the lexical ambiguity, which is commonly referred to as Word Sense Disambiguation, is still an open problem in the field of Natural Language Processing. An approach to Word Sense Disambiguation based on Conceptual Density, a measure of the correlation between concepts, obtained good results with small context windows. This paper presents a method to integrate global knowledge, expressed as global keywords, in this approach. Global keywords are extracted from documents using a model based on term frequency and distribution. Preliminary results show that a slight improvement in recall can be obtained over the base system MH - Italy MH - Mexico|Distrito Federal MH - Spain T3 - COMPUTATIONAL LINGUISTICS AND INTELLIGENT TEXT PROCESSINGLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlebuscaldi@disi.unige.it prosso@dsic.upv.es mmontes@dsic.upv.es0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBCD56 AV - English IS - 0302-9743 UR - ISI:000228725100029 SO - 2005 ;():263-266 13299 UI - 2820 AU - Bustos E AU - Manriquez J AU - Echegoyen L AU - Godinez LA AD - Ctr Invest & Desarrollo Tecnol Electroquim, Electrochem Dept, Queretaro, MexicoClemson Univ, Dept Chem, Clemson, SC 29634, USAGodinez, LA, Ctr Invest & Desarrollo Tecnol Electroquim, Electrochem Dept, Queretaro, Mexico TI - Preparation, characterization and photoelectrochemical study of mixed C-60-Starburst (R) PAMAM G0.0 dendrimer films anchored on the surface of nanocrystalline TiO2 semiconductor electrodes AB - Nanocrystalline TiO2 silanized electrodes were prepared and further modified in a sequential fashion with C-60 and Starburst(R) PAMAM G0.0 dendrimers, resulting in a novel photoelectrochemical sensitization film that showed particularly high photocurrent (IPCE) and global photoconversion efficiencies (eta) MH - Mexico|Queretaro MH - USA PB - CAMBRIDGE: ROYAL SOC CHEMISTRY RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 1359-7345 UR - ISI:000227653000035 L2 - PHOTOCURRENT GENERATION; C-60 CLUSTER; MOLECULAR NANOCLUSTERS; PORPHYRIN-C-60 DYAD; SOLAR-CELL; MONOLAYER; TRANSPORT; ANATASE SO - Chemical Communications 2005 ;(12):1613-1615 13300 UI - 1341 AU - Caballero-Campo P AU - Chirinos M AU - Gonzalez-Pacheco MEG AU - Larrea F AU - Gerton GL AD - Univ Penn, Med Ctr, Philadelphia, PA 19104, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, Mexico TI - Evaluation of human sperm motility and movement characteristics after recombinant zona pellucida treatment MH - Mexico|Distrito Federal MH - USA PB - MADISON: SOC STUDY REPRODUCTION RP - NOT IN FILE U3 - TC 0 U4 - Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0006-3363 UR - ISI:000230556300373 SO - Biology of Reproduction 2005 ;():151-151 13301 UI - 2001 AU - Caballero-Hernandez D AU - Weberb RJ AU - Hicks ME AU - Tamez-Guerra R AU - Rodriguez-Padilla C AU - Tamez-Guerra P AU - Rice KC AU - Ananthan S AU - Gomez-Flores R AD - Univ Autonoma Nuevo Leon, Fac Ciencias Biol, Dept Microbiol & Inmunol, San Nicolas De Los Garza, NL, MexicoUIC Coll Med, Dept Biomed & Therapeut Sci, Peoria, IL, USANIDDK, Med Chem Lab, NIH, Bethesda, MD 20892, USASo Res Inst, Dept Organ Chem, Birmingham, AL 35255, USAGomez-Flores, R, Loma Panoram 321-1,Colonia Loma Larga, Monterrey 64710, Nuevo Leon, Mexico TI - Potentiation of rat lymphocyte proliferation by novel non-peptidic synthetic opioids AB - Opioids represent a major source of relief for acute and chronic, moderate to severe nonmalignant pain. However, opioid abuse may cause immunosuppression leading to infections and cancer development. Recently we reported results on novel non-peptidic delta- and mu-selective opioids that induced immunopotentiation in vitro and ex vivo. In the present study, we investigated the effects of the delta agonist SNC 80, and mu agonists, naltrindole and naltrexone derivatives for their capacity to alter lymphoproliferation in vitro. They were observed to stimulate lymphoproliferation at concentrations ranging from 10(-10) to 10(-5) M. SNC 80 significantly (p<0.05) stimulated (43-311%) proliferation of resident and concanavalin A (Con A)-treated lymphocytes; the naltrindole derivatives 9332 and 9333 caused significant (p<0.05) 26-47% and 13-43%, respectively, stimulation of Con A-treated lymphoproliferation; whereas the naltrexone derivatives 9334 and 9336 significantly (p<0.05) stimulated 9-40% and 15-69%, respectively, proliferation of resident and Con A-treated lymphocytes. These novel opioid ligands could serve as immunotherapeutic agents by increasing the pool of lymphocytes with potential use in the treatment of infectious diseases including AIDS. This study provides evidence of the relationship structure/function of opioids on lymphoproliferation, and supports further evaluation of opioids with immunomodulatory potential in preclinical and clinical studies. (C) 2005 Elsevier B.V. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 1567-5769 UR - ISI:000229714300016 L2 - SNC 80;naltrindole derivatives;naltrexone derivatives;non-peptide opioids;delta-opioid agonist;mu-opioid agonists;lymphoproliferation;NITRIC-OXIDE PRODUCTION; CD4(+) T-CELLS; IN-VITRO; MACROPHAGE FUNCTIONS; IMMUNE FUNCTION; NATURAL-KILLER; RECEPTOR EXPRESSION; PERIPHERAL-BLOOD; CONCANAVALIN-A; MU SO - International Immunopharmacology 2005 ;5(7-8):1271-1278 13302 UI - 411 AU - Cabello-Pasini A AU - Figueroa FL AD - Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, MexicoUniv Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, SpainCabello-Pasini, A, Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico TI - Effect of nitrate concentration on the relationship between photosynthetic oxygen evolution and electron transport rate in Ulva rigida (Chlorophyta) AB - The electron transport rate (ETR) versus gross photosynthesis (GPS) relationship varies as a function of species, temperature, irradiance, and inorganic carbon levels, but less is known about the effect of nitrogen supply on this relationship. The objective of this study was to evaluate the effect of nitrate concentration on the ETR versus GPS relationship in Ulva rigida C. Agardh from the Mediterranean Sea. Chlorophyll content and tissue absorptance increased 2-fold as nitrate in the media increased from 0 to 50 mu M. Whereas internal N content increases 3-fold at 50 mu M, internal C increased slightly. Oxygen evolution and ETR, evaluated as in vivo chl fluorescence using pulse amplitude modulated fluorometry, in general saturated at irradiances above 100 mu mol photons.m(-2).s(-1). Both maximum ETR and GPS values increased as nitrate concentration increased. In general, the ETR versus GPS relationship showed a linear response to increasing nitrate with little variance of the data. This relationship, however, became more variable at high irradiances and high nitrate concentrations. The ETR/GPS ratio was close to the theoretical value of 4 at low nitrate concentrations, and the ratio decreased exponentially when nitrate concentration in the media increased. The variations of ETR/GPS under different inorganic nitrogen supply are discussed in terms of the effect of nitrate on the photosynthesis and respiration relationship MH - Mexico|Baja California MH - Spain PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-3646 UR - ISI:000233829500012 L2 - electron transport rate;fluorescence;nitrate;photosynthesis;Ulva rigida;MODULATED PAM FLUOROMETRY; EXTINCTION COEFFICIENTS; ENERGY-CONVERSION; DIFFERENT LIGHT; QUANTUM YIELD; FLUORESCENCE; PHOTOINHIBITION; MACROALGAE; IRRADIANCE; ASSIMILATION SO - Journal of Phycology 2005 ;41(6):1169-1177 13303 UI - 1270 AU - Cabral AR AU - Cabiedes J AU - cocer-Varela J AU - Shoenfeld Y AD - Tel Aviv Univ, Sheba Med Ctr, Dept Med B, IL-52621 Tel Hashomer, IsraelTel Aviv Univ, Sheba Med Ctr, Ctr Autoimmune Dis, IL-52621 Tel Hashomer, IsraelInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City 14000, DF, MexicoShoenfeld, Y, Tel Aviv Univ, Sheba Med Ctr, Dept Med B, IL-52621 Tel Hashomer, Israel TI - Donato Alarcon-Segovia: A life dedicated to the study of autoimmunity MH - Israel MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Immunology U5 - J;Biographical-Item AV - English IS - 1568-9972 UR - ISI:000231766800001 SO - Autoimmunity Reviews 2005 ;4(6):323-328 13304 UI - 1496 AU - Cabrera-Trujillo R AU - Cruz SA AU - Soullard J AD - Univ Florida, Dept Phys, Gainesville, FL 32611, USAUniv Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoCabrera-Trujillo, R, Univ Florida, Dept Phys, Gainesville, FL 32611, USA TI - From the orbital implementation of the kinetic theory to the polarization propagator method in the study of energy deposition problems AB - The energy deposited by swift atomic-ion projectiles when colliding with a given target material has been a topic of special scientific interest for the last century due to the variety of applications of ion beams in modem materials technology as well as in medical physics. In this work, we summarize our contributions in this field as a consequence of fruitful discussions and enlightening ideas put forward by one of the main protagonists in stopping power theory during the last three decades: Jens Oddershede. Our review, mainly motivated by Jens' work, evolves from the extension of the orbital implementation of the kinetic theory of stopping through the orbital local plasma approximation, its use in studies of orbital and total mean excitation energies for the study of atomic and molecular stopping until the advances on generalized oscillator strength and sum rules in the study of stopping cross sections. Finally, as a tribute to Jens' work on the orbital implementation of the kinetic theory of stopping, in this work we present new results on the use of the Thomas-Fermi-Dirac-Weizsiicker density functional for the calculation of orbital and total atomic mean excitation energies. The results are applied to free-atoms and and extension is done to confined atoms - taking Si as an example - whereby target pressure effects on stopping are derived. Hence, evidence of the far-yield of Jens' ideas is given MH - Mexico|Distrito Federal MH - USA PB - SAN DIEGO: ELSEVIER ACADEMIC PRESS INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical U5 - S;Review AV - English IS - 0065-3276 UR - ISI:000231014500018 L2 - STOPPING CROSS-SECTIONS; STATISTICAL ATOMIC MODELS; OSCILLATOR-STRENGTH DISTRIBUTIONS; DECAYING ELECTRON-DENSITIES; LOCAL PLASMA APPROXIMATION; MEAN EXCITATION-ENERGIES; BRAGG RULE; MOLECULAR TARGETS; SHELL CORRECTIONS; POWER ADDITIVITY SO - Advances in Quantum Chemistry, Vol 48 2005 ;48():335-367 13305 UI - 2089 AU - Cabrera F AU - Gonzalez F AU - Batista M AU - Calero P AU - Medrano A AU - Gracia A AD - Univ Las Palmas Gran Canaria, Fac Vet, Las Palmas Gran Canaria 35416, SpainUniv Nacl Autonoma Mexico, Fac Estudios Super Cuatitlan, Mexico City 04510, DF, MexicoCabrera, F, Univ Las Palmas Gran Canaria, Fac Vet, Las Palmas Gran Canaria 35416, Spain TI - The effect of removal of seminal plasma, egg yolk level and season on sperm freezability of canary buck (Capra hircus) AB - Goat semen is different from that of other domestic species in its limited tolerance to the inclusion of egg yolk in the freezing medium, and this tolerance depends on the presence of enzymes in the seminal plasma that react with egg yolk, producing toxic compounds to the spermatozoa. Moreover, the goat is a seasonal breeder that shows variations in semen quality throughout the year, and those variations may affect semen freezability; hence in freezing protocols, for instance, removal of seminal plasma (washing) yields varying results. This work was designed to study this problem in Canary goats: semen from six males was collected in spring, autumn or winter, washed or non-washed, diluted in a freezing extender with 1.5, 6 or 12% egg yolk, frozen, and thawed after 2 days, 2 or 6 months of cryopreservation. The effect of egg yolk concentration in the freezing extender was far more important than the effect of washing or season on sperm cryosurvival. The quality of frozen-thawed semen tended to improve as egg yolk concentration increased regardless of the effects of season, washing or period of cryopreservation. Washing produced a positive effect on frozen-thawed semen collected during spring or autumn, but the difference decreased as the concentration of yolk increased. However, washing produced a negative effect on frozen-thawed semen collected during winter, diluted with either 6 or 12% egg yolk. There was no apparent seasonal effect on gross measures of sperm production but the seasonal effect was ever present and was reinforced by freezing MH - Mexico|Distrito Federal MH - Spain PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Agriculture, Dairy & Animal Science;Reproductive Biology;Veterinary Sciences U5 - J;Article AV - English IS - 0936-6768 UR - ISI:000229492700001 L2 - GOAT SPERMATOZOA; ANGORA-GOAT; SEMEN; FROZEN; VIABILITY; SURVIVAL; STORAGE SO - Reproduction in Domestic Animals 2005 ;40(3):191-195 13306 UI - 1805 AU - Cabrera MEM AU - Sujo LC AU - Villalba L AU - Gandara SDC AU - Peinado JS AU - Villalobos MR AU - Aguirre LHS AU - Peraza EFH AU - Lopez L AU - Gardea-Torresdey JL AD - Sc Miguel Cervantes, Ctr Invest Mat Avanzados, Chihuahua, Chih, MexicoInst Tecnol Chihuahua II, Chihuahua, Chih, MexicoUniv Autonoma Chihuahua, Fac Enfermeria & Nutriol, Chihuahua, Chih, MexicoUniv Texas, Dept Phys, El Paso, TX 79968, USAUniv Texas, Dept Chem, El Paso, TX 79968, USACabrera, MEM, Sc Miguel Cervantes, Ctr Invest Mat Avanzados, 120 Complejo Ind Chihuahua, Chihuahua, Chih, Mexico TI - Rn-222 air concentrations in Chihuahua State (Mexico) dwellings and in the US/Mexico border AB - Using charcoal detectors and electrets, radon concentrations were measured at 12 different locations in Mexico, homes in particular, throughout Chihuahua State. While these measurements were short-term, long-term measurements were also conducted around Chihuahua and Aldama cities using LR-115 II type detectors. In addition, LR-115 II type detectors were deployed for comparative purposes between Ciudad Juarez (Mexico) and El Paso (Texas). Significant average radon values were obtained in Aldama and Parral at 225 and 173 Becquerel per cubic meter (Bq m(-3)), respectively. Over 30% of the homes sampled in Aldama, Cuauhtemoc, Parral and Chihuahua had radon concentrations greater than 148 Bq m(0 (c) 2005 Elsevier B.V All rights reserved MH - Mexico|Chihuahua MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0026-265X UR - ISI:000230264500007 L2 - indoor radon;short-term radon sampling;long-term radon sampling;charcoal detector;electrets;Chihuahua;US/Mexico border;CHARCOAL ADSORPTION; INDOOR RADON; COLLECTOR; REGIONS; CITY SO - Microchemical Journal 2005 ;81(1):28-34 13307 UI - 952 AU - Caceres E AU - Nunez C AD - Univ Texas, Dept Phys, Theory Grp, Austin, TX 78712, USACINVESTAV, Mexico City 07000, DF, MexicoMIT, Ctr Theoret Phys, Cambridge, MA 02139, USACaceres, E, CINVESTAV, Apdo 14-740, Mexico City 07000, DF, Mexico TI - Glueballs of super Yang-Mills from wrapped branes AB - In this paper we study qualitative features of glueballs in N = 1 SYM for models of wrapped branes in IIA and IIB backgrounds. The scalar mode, 0(++) is found to be a mixture of the dilaton and the internal part of the metric. We carry out the numerical study of the IIB background. The potential found exhibits a mass gap and produces a discrete spectrum without any cut-off. We propose a regularization procedure needed to make these states normalizable MH - Mexico|Distrito Federal MH - USA PB - TRIESTE: INT SCHOOL ADVANCED STUDIES RP - NOT IN FILE U3 - TC 9 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 1126-6708 UR - ISI:000232334600027 L2 - duality in gauge field theories;confinement;AdS;CFT and dS-CFT correspondence;LARGE-N; STRING THEORY; MASS-SPECTRUM; GAUGE-THEORY; QCD; SUPERGRAVITY; SCATTERING; DYNAMICS; HOLONOMY; DUALITY SO - Journal of High Energy Physics 2005 ;(9): 13308 UI - 29 AU - Caddy F AU - Surette T AD - Fisheries & Oceans Canada, Moncton, NB, CanadaMarista Univ, Merida, Yucatan, MexicoCaddy, F, Fisheries & Oceans Canada, 343 Univ Ave,POB 5030, Moncton, NB, Canada TI - In retrospect the assumption of sustainability for Atlantic fisheries has proved an illusion AB - Fishery landings data series from 1970 to 2002 for the Northeast (FAO Area 27) and Northwest Atlantic (Area 21) with 73 and 42 species or species groups respectively, were mapped onto single charts as a diagnostic of the overall state of fisheries in these two regions, and could be appreciated simultaneously for the entire exploited suite of species as a series of contiguous bar charts. Charts were compared with that for a similar data set of 42 species or species groups from the Mediterranean and Black Seas (FAO Area 37). A "traffic light convention" partitioned the range of landings by species over the period into four equal intervals; coloured respectively red, yellow, green and blue between zero and the highest annual landing of the species. This allowed a model-free display of changes in the timing of species' landings at the overall ecosystem level, as represented by the important commercial resources in the three areas. The year T-50 by which 50% of species landings had been harvested over the period, was considered a comparable measure of the response of individual species to exploitation. For a significant proportion of groundfish and pelagic fishes, the time to reach T-50 occurred early in the Atlantic time series. The hypothesis was tested that this measure of the depletion schedule is related to some aspect of species biology, as judged by data from the FISHBASE database. Except for commercial invertebrates where landings peaked late in the Northwest Atlantic time series, no significant regression was found between T-50 values per species and any biological characteristic of the species of finfish tested, suggesting that scheduling may reflect overcapacity and targeting by fisheries and/or regime changes. A decline in peak landings proceeded sequentially over time for the large proportion of all finfish species in the North Atlantic following a broadly similar trajectory. Possible exceptions were deeper water species where fisheries began later, suggesting that "fishing down the bathymetry" has occurred. A more synchronous "pulse" of high landings occurred in the Mediterranean and Black Seas in the mid-late 1980s, which was postulated as due to an increase in system productivity. Although regime changes and quota management cannot be excluded as partly responsible for the persistent low landings late in many time series, the main conclusion is that for all three areas, the effects of fishing overshadow those resulting from differing biological characteristics, habit, or species interactions. Although quota control may in part be responsible for low landings of some species late in the time series, the fishery management regimes that applied during 1970-2002 cannot be considered sustainable. This was confirmed by comparative analysis fitting a variety of models to the raw landing data. Of the mathematical models considered, the Hubbert curve, first used to predict the trajectory of extraction of non-renewable petroleum resources globally over time, best fitted the largest proportion of species time series. This seems to confirm that a hypothesis of harvest sustainability cannot be supported by the landing data MH - Canada MH - Mexico|Yucatan PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0960-3166 UR - ISI:000239023200001 L2 - analysis fisheries landing trends;exploitation;unsustainability criteria;North Atlantic and Mediterranean multispecies fisheries;traffic light monitoring;SEMIENCLOSED SEAS; EXTINCTION RISK; MARINE; MANAGEMENT; ECOSYSTEM SO - Reviews in Fish Biology and Fisheries 2005 ;15(4):313-337 13309 UI - 962 AU - Caddy JF AU - Wade E AU - Surette T AU - Hebert M AU - Moriyasu M AD - Gulf Fisheries Ctr, Gulf Reg, Oceans & Sci Branch, Dept Fisheries & Oceans, Moncton, NB E1C 9B6, CanadaUniv Marista Merida, Yucatan 97300, MexicoWade, E, Gulf Fisheries Ctr, Gulf Reg, Oceans & Sci Branch, Dept Fisheries & Oceans, POB 5030, Moncton, NB E1C 9B6, Canada TI - Using an empirical traffic light procedure for monitoring and forecasting in the Gulf of St. Lawrence fishery for the snow crab, Chionoecetes opilio AB - A traffic light procedure is used for comparing temporal evolution of indicators of the snow crab (Chionoectes opilio) abundance, fishery success and environmental change. Indicators related to recruitment success in the fishery between 1968 and 2003 were followed and comparisons with life history stages (in trawl surveys conducted over 15 years) allowed the temporal sequence of events in the life cycle to be established. Although recruitment seems to be synchronized with bottom temperature, and may be related to abundance changes in groundfish predators, the main factors determining recruitment fluctuations appear to be density-dependent interactions between life history stages. Establishing the abundance and timing of successive life history stages using the traffic light approach seems to provide a reliable indication of their passage through the fishery, and might be used to make forecasts of the condition of the fishery several years ahead. The analysis raises the question of which of a number of possible density-dependent factors are dominant. Two management approaches by reference points and fisheries control rules are suggested. Crown Copyright (c) 2005 Published by Elsevier B.V. All rights reserved MH - Canada MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Fisheries U5 - J;Article AV - English IS - 0165-7836 UR - ISI:000232426400011 L2 - snow crab;traffic light;fisheries management;indicators;REFERENCE POINTS; 1788 DECAPODA; MAJIDAE; MATURITY; FABRICIUS,O.; MANAGEMENT; FECUNDITY; BRACHYURA; FEMALES; GROWTH SO - Fisheries Research 2005 ;76(1):123-145 13310 UI - 2853 AU - Caddy JF AU - Seij JC AD - Univ Marista Merida, Merida 97300, Yucatan, MexicoCaddy, JF, Via Cervialto 3, I-04011 Aprilia, Italy TI - This is more difficult than we thought! The responsibility of scientists, managers and stakeholders to mitigate the unsustainability of marine fisheries AB - The management of marine fisheries needs to undergo dramatic change in the new millennium, in response to the well-documented evidence of global overfishing and the general depletion of commercial fish stocks. The axioms of sustainable development and equilibrium productivity of wild ecosystems are identified as misleading concepts, which nonetheless underlie current approaches to the management of living marine resources. Current trends in marine fisheries landings worldwide provide little evidence of sustainability of marine resources under current management paradigms, where biological, economic and social aspects of fisheries are usually treated as different disciplines. While open-access conditions are less widespread than formerly, except for many straddling and highly migratory resources, fishers usually have access to the resource year-round throughout its range. Despite quotas, the nominal control of capacity and technical measures protecting juveniles, top-down management has generally been unable to prevent stock depletion, particularly of the older spawners that for demersal stocks often support recruitment. An integrated solution to the complexity of managing wild resources seems not to have been achieved. Any new paradigm should assert the basic unpredictability of fisheries at the system level and require a broader range of performance indicators to be incorporated into the decisional framework. This must reflect the non-equilibrium nature of marine systems, and give greater importance to resource (as opposed to harvest) continuity in the face of regime shifts, and promote habitat restoration and conservation of genetic resources. The new management framework requires co-management and collective decision-making to be incorporated within a precautionary and pre-negotiated management framework. This must explicitly recognize that decision-making occurs in conditions of model-based uncertainty and precautionary approaches should be incorporated at all levels, not least of which is to avoid the assumption that all resources can be harvested in a sustainable fashion through time. Redundancy in data inputs to management are needed to avoid the surprises that model-based sampling occasionally leads to, for example, when regime changes reduce productivity in response to climatic fluctuations. Emergency frameworks imposing non-discretionary rules must be invoked when overfishing and/or regime change trigger reference points indicating stock depletion. Non-discretionary recovery plans should then override rights-based systems and persist until fish populations recover to pre-established healthy levels, which may in turn need to await the return of a favourable regime. In fact, some stocks may require periodic rebuilding after regime-induced collapses or because of a combination of ecological or economic impacts, hence a constant harvest policy may not always be possible. It will probably also be necessary to discard the axiom that a stock should be available to harvesting throughout its range and seasonal cycle. Technological advances mean that time- and area-specific access rights are now practical options, through satellite monitoring of vessel operations, even offshore. More fundamentally, the basic axiom of 'enlightened self interest' underlying current methods of management will need to be tempered by an increased ethical concern for the fragility of natural ecosystems MH - Italy MH - Mexico|Yucatan PB - LONDON: ROYAL SOCIETY RP - NOT IN FILE U3 - TC 14 U4 - Biology U5 - J;Review AV - English IS - 0962-8436 UR - ISI:000227514700006 L2 - non-sustainability;fisheries management;stock assessment;socio-economics;FISH STOCKS; SEMIENCLOSED SEAS; REFERENCE POINTS; DECADAL CHANGES; PATTERNS; FLUCTUATIONS; UNCERTAINTY; VARIABILITY; RECRUITMENT; INDICATORS SO - Philosophical Transactions of the Royal Society B-Biological Sciences 2005 ;360(1453):59-75 13311 UI - 428 AU - Cairns CE AU - Villanueva-Gutierrez R AU - Koptur S AU - Bray DB AD - Florida Int Univ, Dept Environm Studies, Miami, FL 33199, USAUS EPA, Air Pesticides & Tox Management Div, Atlanta, GA 30303, USAECOSUR, Chetumal 77900, Quintana Roc, MexicoFlorida Int Univ, Dept Biol Sci, Miami, FL 33199, USACairns, CE, Florida Int Univ, Dept Environm Studies, 11200 SW 8th St, Miami, FL 33199 USA TI - Bee populations, forest disturbance, and africanization in Mexico AB - This stud), documents the stingless bees' (Meliponinae) recent displacement in the Yucatan (Quintana Roo, Mexico) and the effects of human-induced ecosystem disturbance on bee diversity. Point observations of flower-visiting bees were made along transects in three communities with different degrees of human-induced ecosystem disturbance. The community with the greatest anthropogenic disturbance had lower overall species richness of stingless bees and the highest degree of dominance of the Africanized honeybee (Apis mellifera scutellata), while the area with the most intact ecosystem had the highest diversity of stingless bees, though A. mellifera was still the dominant species. We observed aggressive competitive behavior involving physical attacks by A. mellifera against stingless bees, indicating that Africanized honeybees are adopting new behaviors to compete better with dominant native pollinator species MH - USA MH - Mexico|Quintana Roo PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Ecology U5 - J;Article AV - English IS - 0006-3606 UR - ISI:000233766800022 L2 - Africanized honeybees;Apis mellifera;competition;diversify;forest disturbance;land use;Maya;Meliponinae;Mexico;pollination;Quintana Roo;stingless bees;Yucatan;HONEY-BEES; HABITAT FRAGMENTATION; POLLINATORS SO - Biotropica 2005 ;37(4):686-692 13312 UI - 491 AU - Calderbon NL AU - Galindo-Muniz F AU - Ortiz M AU - Lomniczi B AU - Fehervari T AU - Paasch LH AD - Natl Autonomous Univ Mexico, Dept Anim Prod Poultry, Fac Vet Med & Anim Sci, Mexico City 04510, DF, MexicoNatl Serv Hlth Innocuity & Qual Agr Prod, Mexico City, DF, MexicoHungarian Acad Sci, Vet Med Res Inst, Budapest, HungaryCalderbon, NL, Cerrada Arenal 44 Casa 5,Valle Escondido, Mexico City 14600, DF, Mexico TI - Thrombocytopenia in Newcastle disease: Haematological evaluation and histological study of bone marrow AB - A Newcastle disease virus (NDV) isolated in Mexico and called Chimalhuacan strain was characterised by gene F restriction enzyme analysis and found to be a genotype II velogenic virus. Haematological evaluations and histological Studies of bone marrow were conducted oil chickens experimentally infected with the Chimalhuacan virus and oil control chickens. Within 72 hours post infection (hpi), a 50% decrease in thrombocyte and monocyte Counts and a complete cellular depletion in bone marrow islands were evident in the infected group. These Findings Suggest that the Chimalhuacan strain of NDV causes an early and severe damage of the haematopoietic cells including thrombocyte precursors, which might explain the marked thrombocytopenia detected in early stages of this disease MH - Hungary MH - Mexico|Distrito Federal PB - BUDAPEST: AKADEMIAI KIADO RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0236-6290 UR - ISI:000233681500011 L2 - Newcastle disease;bone marrow;pathology;thrombocytopenia;CHICKEN ANEMIA AGENT; VIRUS-INFECTION; PATHOGENESIS SO - Acta Veterinaria Hungarica 2005 ;53(4):507-513 13313 UI - 2246 AU - Calderon-Garciduenas L AU - Romer L AU - Barragan G AU - Reed W AD - Univ Montana, Missoula, MT 59812, USAInst Nacl Pediat, Mexico City, DF, MexicoUniv N Carolina, Chapel Hill, NC 27599, USA TI - Upregulation of plasma endothelin-1 (ET-1) levels and CD14 expression on peripheral blood monocytes in healthy children chronically exposed to urban air pollution MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000227610703333 SO - Faseb Journal 2005 ;19(4):A489-A489 13314 UI - 1634 AU - Calderon C AU - Gordillo G AU - Romero E AU - Bolanos W AU - Bartolo-Perez P AD - Univ Nacl Colombia, Dept Fis, Bogota, ColombiaIPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Merida, Yuc, MexicoCalderon, C, Univ Nacl Colombia, Dept Fis, Bogota, Colombia TI - Optical, electrical and structural characterization of CuInSe2 thin films MH - Colombia MH - Mexico|Yucatan PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 0 U4 - Physics, Condensed Matter U5 - J;Editorial Material AV - English IS - 0370-1972 UR - ISI:000230776400001 SO - Physica Status Solidi B-Basic Solid State Physics 2005 ;242(9): 13315 UI - 1641 AU - Calderon C AU - Gordillo G AU - Romero E AU - Bolanos W AU - Bartolo-Perez P AD - Univ Nacl Colombia, Dept Fis, Bogota, ColombiaIPN, Ctr Invest & Estudios Avanzados, Dept Fis Aplicada, Merida, Yuc, MexicoCalderon, C, Univ Nacl Colombia, Dept Fis, Bogota, Colombia TI - Optical, electrical and structural characterization of CuInSe2 thin films AB - Structural, optical and electrical properties of polycrystalline p-type CuInSe2 (CIS) thin films, grown by a process including a chemical reaction between Cu and InxSey thin films deposited sequentially by evaporation, followed by annealing in a Se environment, were studied through XRD (X-ray diffraction), transmittance and Hall voltage measurements. The conditions to grow CIS thin films in the a phase of the chalcopyrite structure were found through a parameter study. CIS films with these characteristics are usually used for the fabrication of high efficiency solar cells. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Colombia MH - Mexico|Yucatan PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000230776400038 L2 - EFFICIENCY; THICKNESS SO - Physica Status Solidi B-Basic Solid State Physics 2005 ;242(9):1910-1914 13316 UI - 1858 AU - Calderon HA AU - Kostorz G AU - Calzado-Lopez L AU - Kisielowski C AU - Mori T AD - IPN, ESFM, Dept Ciencia Mat, Mexico City 07738, DF, MexicoSwiss Fed Inst Technol, Inst Angew Phys, Zurich, SwitzerlandUniv Calif Berkeley, LBNL, Natl Ctr Electron Microscopy, Berkeley, CA 94720, USAUniv Manchester, Ctr Mat Sci, Manchester, Lancs, EnglandCNRS, CEMES, Toulouse, FranceCalderon, HA, IPN, ESFM, Dept Ciencia Mat, Mexico City 07738, DF, Mexico TI - High-resolution electron-microscopy analysis of splitting patterns in Ni alloys AB - The late stages of coarsening of coherent solid particles is strongly influenced by the reduction of elastic strain energy. This produces migration and alignment of particles as well as some other effects. In this investigation, the origin of the so-called splitting pattern arrangement of gamma' precipitate particles, an arrangement which has often been interpreted as being due to splitting of a larger particle into smaller ones, has been studied. The two-particle relationship as to whether they are in-phase or out-of-phase is examined by means of a translation order domain analysis of high-resolution electron-microscopy images along a zone axis parallel to [001]. Ni alloys have been used for the investigation including a binary Ni-Al alloy (producing different volume fractions) and two commercial multicomponent alloys with high volume fraction. About 72% of two-particle pairs forming the splitting configuration are in the out-of-phase relationship, indicating that adjacent pairs are randomly formed and that they are not formed by the splitting of a large particle. In addition, an elasticity analysis shows that the elastic interaction energy of two gamma' particles exhibits a minimum at a certain separation distance along [100] MH - United Kingdom MH - France MH - Mexico|Distrito Federal MH - Switzerland MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 2 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0950-0839 UR - ISI:000230131900001 L2 - ELASTICALLY STRESSED SOLIDS; PRECIPITATE EVOLUTION; DYNAMICS; SYSTEMS; SHAPE SO - Philosophical Magazine Letters 2005 ;85(2):51-59 13317 UI - 299 AU - Calderon NEG AU - Krasilnikov PV AU - Huerta AI AU - Arteaga GA AU - Romero EF AU - Castro BM AD - UNAM, Fac Ciencias, Lab Edafol, Mexico City, DF, MexicoRussian Acad Sci, KarRC, Inst Biol, Lab Soil Ecol & Soil Geog, Petrozavodsk, RussiaCalderon, NEG, UNAM, Fac Ciencias, Lab Edafol, Mexico City, DF, Mexico TI - WRB classification of polygenetic soils of Sierra Sur de Oaxaca, Mexico AB - Complex polygenetic profiles form in mountainous tropical areas in Sierra Sur de Oaxaca, Southern Mexico. Some soils form on complex sediments: colluvial materials over deeply weathered clays. Depending on the genetic interpretation, they are classified as Chromic Luvisols or Thaptoluvic Cambisols. Other soils passed a long evolution in stable environments, and may be classified as Ferralsols; however, using only formal criteria. the soils should be Hyperferralic Umbrisols. Strongly acid materials with low extractable aluminum and high BS attest to the incorporation of less weathered rock in some profiles. Required analyses are sometimes inappropriate for deterring the placement of some soils MH - Mexico|Distrito Federal MH - Russia PB - BIRMINGHAM: INTERPERIODICA RP - NOT IN FILE U3 - TC 0 U4 - Soil Science U5 - J;Article AV - English IS - 1064-2293 UR - ISI:000234137300005 SO - Eurasian Soil Science 2005 ;38():S27-S34 13318 UI - 409 AU - Caldino U AU - Hernandez-Pozos JL AU - Flores C AU - Speghini A AU - Bettinelli M AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Mexico City 09340, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Verona, Dipartimento Sci & Tecnol, I-37314 Verona, ItalyINSTM, UdR Verona, I-37314 Verona, ItalyCaldino, U, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico TI - Photoluminescence of Ce3+ and Mn2+ in zinc metaphosphate glasses AB - The spectroscopic characterization of zinc metaphosphate glasses, singly and doubly doped with Ce3+ and Mn2+ ions, is performed through excitation and emission spectra and decay time measurements. The weak yellow emission of Mn2+ is significantly enhanced by means of an efficient energy transfer from Ce3+ to Mn2+ ions. The efficiency of the energy transfer has been estimated based on spectroscopic data, and turned out to be about 53%. From spectroscopic data it can also be inferred that the energy transfer is nonradiative in nature and it takes place between Ce3+ and Mn2+ clusters formed in the glass through a short-range interaction mechanism. This impurity clustering appears to be a relevant finding for the design of efficient conversion phosphors of ultraviolet to visible light MH - Italy MH - Mexico|Distrito Federal PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0953-8984 UR - ISI:000233785700018 L2 - EARTH PHOSPHATE-GLASSES; ENERGY-TRANSFER; OPTICAL SPECTROSCOPY; SINGLE-CRYSTALS; IONS; CAF2; LUMINESCENCE; EU2+; (R2O3)(X)(P2O5)(1-X); FLUORESCENCE SO - Journal of Physics-Condensed Matter 2005 ;17(46):7297-7305 13319 UI - 2388 AU - Calleja-Macias IE AU - Kalantari M AU - Allan B AU - Williamson AL AU - Chung LP AU - Collins RJ AU - Zuna RE AU - Dunn ST AU - Ortiz-Lopez R AU - Barrera-Saldana HA AU - Cubie HA AU - Cuschieri K AU - Villa LL AU - Bernard HU AD - Univ Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92697, USAUniv Cape Town, Inst Infect Dis & Mol Med, Fac Hlth Sci, ZA-7925 Cape Town, South AfricaUniv Cape Town, Natl Hlth Lab Serv, ZA-7925 Cape Town, South AfricaQueen Mary Hosp, Hong Kong, Hong Kong, Peoples R ChinaUniv Hong Kong, Hong Kong, Hong Kong, Peoples R ChinaUniv Oklahoma, Hlth Sci Ctr, Dept Pathol, Oklahoma City, OK 73104, USAUniv Autonoma Nueva Leon, Dept Bioquim, Fac Med, Monterrey, MexicoRoyal Infirm, Edinburgh, Midlothian, ScotlandLudwig Inst Canc Res, Sao Paulo, BrazilBernard, HU, Univ Calif Irvine, Dept Mol Biol & Biochem, Irvine, CA 92697 USA TI - Papillomavirus subtypes are natural and old taxa: Phylogeny of human papillomavirus types 44 and 55 and 68a and -b AB - A human papillomavirus (HPV) type is defined as an HPV isolate whose L1 gene sequence is at least 10% different from that of any other type, while a subtype is 2 to 10% different from any HPV type. In order to analyze the phylogeny behind the subtype definition, we compared 49 isolates of HP`V type 44 (HPV-44) and its subtype HPV-55, previously misclassified as a separate type, and 41 isolates of the subtype pair HPV-68a and -b, sampled from cohorts in four continents. The subtypes of each pair are separated by deep dichotomic branching, and three of the four subtypes have evolved large phylogenetic clusters of genomic variants forming a "star" phylogeny, with some branches specific for ethnically defined cohorts. We conclude that subtypes of HPV types are natural and old taxa, equivalent to types, which either diverged more recently than types or evolved more slowly MH - USA MH - Brazil MH - Mexico|Nuevo Leon MH - Peoples R China MH - United Kingdom MH - South Africa PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 8 U4 - Virology U5 - J;Article AV - English IS - 0022-538X UR - ISI:000228814400071 L2 - HUMAN-POPULATIONS; COEVOLUTION; DIVERSITY; DNA SO - Journal of Virology 2005 ;79(10):6565-6569 13320 UI - 666 AU - Calligaro T AU - Dran JC AU - Dubernet S AU - Poupeau G AU - Gendron F AU - Gonthier E AU - Meslay O AU - Tenorio D AD - Ctr Rech & Restaurat Musees France, UMR 171, F-75001 Paris, FranceUniv Bordeaux 3, CNRS, UMR 5060, Ctr Rech Phys Appl Archeol, Pessac, FranceMuseum Natl Hist Nat, Dept Prehist, UMR 5198, F-75013 Paris, FranceMusee Louvre, Dept Peintures, Paris, FranceInst Nacl Invest Nucl, Mexico City 11801, DF, MexicoCalligaro, T, Ctr Rech & Restaurat Musees France, UMR 171, Palais Louvre Porte Lions,14 Quai Francois Mitter, F-75001 Paris, France TI - PIXE reveals that two Murillo's masterpieces were painted on Mexican obsidian slabs AB - Two paintings by Murillo from the Louvre Museum entitled Agony in the garden and Penitent St. Peter kneeling before Christ and the column were analysed by PIXE to identify the nature of their unusual dark mineral backing. Considered until now as black marble, this support turns out to be obsidian, with an almost identical elemental composition for the two works. This composition was compared to that of six Mesoamerican unpainted obsidians labelled "smoking mirrors" with comparable size and shape from the Paris Museum National d'Histoire Naturelle and Musee de l'Homme and to that of geological samples from five Mexican sources. The trace element contents of Murillo's obsidians, in particular those of Mn, Zr, Sr, Y, Rb, Zr, Nb and Zn appeared to be very similar to that of four smoking mirrors and to that of obsidians from the Ucareo-Zinapecuaro source in central Mexico, an important complex of obsidian quarries exploited since pre-Hispanic times. A literature survey showed no such similarity with obsidians from other Mesoamerican sources or even from Mediterranean and surroundings source-areas. This study points out that Murillo, although living in Sevilla, had occasionally employed for his paintings materials shipped from the New World to Spain. (c) 2005 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical;Physics, Nuclear U5 - J;Article AV - English IS - 0168-583X UR - ISI:000233208400110 L2 - Mesoamerica;Mexico;Murillo;painting;obsidian;PIXE;provenance;BEAM SO - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 2005 ;240(1-2):576-582 13321 UI - 1273 AU - Calvet N AU - D'Alessio P AU - Watson DM AU - Franco-Hernandez R AU - Furlan E AU - Green J AU - Sutter PM AU - Forrest WJ AU - Hartmann L AU - Uchida KI AU - Keller LD AU - Sargent B AU - Najita J AU - Herter TL AU - Barry DJ AU - Hall P AD - Smithsonian Astrophys Observ, Cambridge, MA 02138, USAUNAM, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoUniv Rochester, Dept Phys & Astron, Rochester, NY 14627, USACornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853, USAIthaca Coll, Dept Phys, Ithaca, NY 14850, USANatl Opt Astron Observ, Tucson, AZ 85719, USACalvet, N, Smithsonian Astrophys Observ, 60 Garden St, Cambridge, MA 02138 USA TI - Disks in transition in the Taurus population: Spitzer IRS spectra of GM Aurigae and DM Tauri AB - We present Spitzer Infrared Spectrograph (IRS) observations of two objects of the Taurus population that show unambiguous signs of clearing in their inner disks. In one of the objects, DM Tau, the outer disk is truncated at 3 AU; this object is akin to another recently reported in Taurus, CoKu Tau/4, in that the inner disk region is free of small dust. Unlike CoKu Tau/4, however, this star is still accreting, so optically thin gas should still remain in the inner disk region. The other object, GM Aur, also accreting, has similar to 0.02 lunar masses of small dust in the inner disk region within similar to 5 AU, consistent with previous reports. However, the IRS spectrum clearly shows that the optically thick outer disk has an inner truncation at a much larger radius than previously suggested, similar to 24 AU. These observations provide strong evidence for the presence of gaps in protoplanetary disks MH - USA MH - Mexico|Michoacan PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 45 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000231664600021 L2 - accretion, accretion disks;circumstellar matter;stars : formation;stars : pre-main-sequence;MAIN-SEQUENCE EVOLUTION; TW-HYDRAE ASSOCIATION; ACCRETION DISKS; INFRARED SPECTROGRAPH; CIRCUMSTELLAR DISKS; SPACE-TELESCOPE; YOUNG OBJECTS; STARS; PLANET; DUST SO - Astrophysical Journal 2005 ;630(2):L185-L188 13322 UI - 3164 AU - Calvet N AU - Briceno C AU - Hernandez J AU - Hoyer S AU - Hartmann L AU - Sicilia-Acuilar A AU - Megeath ST AU - D'Alessio P AD - Smithsonian Astrophys Observ, Cambridge, MA 02138, USACtr Invest Astron, Merida 5101A, VenezuelaPontificia Univ Catolica Chile, Santiago 22, ChileCtr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoCalvet, N, Smithsonian Astrophys Observ, Mail Stop 42, Cambridge, MA 02138 USA TI - Disk evolution in the Orion OB1 association AB - We analyze multiband photometry of a subsample of low-mass stars in the associations Ori OB1a and 1b discovered during the Centro de Investigaciones de Astronomia (CIDA) Orion Variability Survey, which have ages of 7-10 and 3-5 Myr, respectively. We obtained UBVRCIC photometry at Mount Hopkins for six classical T Tauri stars (CTTSs) and 26 weak T Tauri stars (WTTSs) in Ori OB1a and for 21 CTTSs and two WTTSs in Ori OB1b. We also obtained L-band photometry for 14 CTTSs at Mount Hopkins and 10 and 18 mum photometry with OSCIR at Gemini for six CTTSs; of these, all six were detected at 10 pm, whereas only one was detected at 18 mum. We estimate mass accretion rates from the excess luminosity at U and find that they are consistent with determinations for a number of other associations, with or without high-mass star formation. The observed decrease of mass accretion rate with age is qualitatively consistent with predictions of viscous evolution of accretion disks, although other factors can also play a role in slowing accretion rates. We compare the excesses over photospheric fluxes in H - K, K - L, and K - N with the younger sample of Taurus and find an overall decrease of disk emission from Taurus to Ori OB1b to Ori OB1a. This decrease implies that significant grain growth and settling toward the midplane has taken place in the inner disks of Ori OB1. We compare the spectral energy distribution of the star detected at both 10 and IS mum with disk models for similar stellar and accretion parameters. We find that the low fluxes shortward of 18 mum of this Ori OB1b star cannot be due to the smaller disk radius expected from viscous evolution in the presence of the far-ultraviolet radiation fields from the OB stars in the association. Instead, we find that the disk of this star is essentially a flat disk, with little if any flaring, indicating a significant degree of dust settling toward the midplane, as expected from dust evolution in protoplanetary disks MH - USA MH - Chile MH - Mexico|Michoacan MH - Venezuela PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 15 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000226852900027 L2 - T-TAURI-STARS; SPECTRAL ENERGY-DISTRIBUTIONS; INTERMEDIATE-MASS STARS; MAIN-SEQUENCE TRACKS; ACCRETION DISKS; STELLAR POPULATION; FORMING REGION; YOUNG OBJECTS; CIRCUMSTELLAR DISKS; INFRARED-EMISSION SO - Astronomical Journal 2005 ;129(2):935-946 13323 UI - 1557 AU - Calvo O AU - Munoz V AU - Presas F AD - CIMAT, Guanajuato 36000, MexicoUniv Autonoma Madrid, Dept Matemat, E-28049 Madrid, SpainCalvo, O, CIMAT, Ap Postal 402, Guanajuato 36000, Mexico TI - Codimension one symplectic foliations AB - We define the concept of symplectic foliation on a symplectic manifold and provide a method of constructing many examples, by using asymptotically holomorphic techniques MH - Mexico|Guanajuato MH - Spain PB - MADRID: UNIVERSIDAD AUTONOMA MADRID RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0213-2230 UR - ISI:000230855000002 L2 - foliation;symplectic;asymptotically holomorphic;HOLOMORPHIC FOLIATIONS; IRREDUCIBLE COMPONENTS; SUBMANIFOLDS; N-GREATER-THAN-OR-EQUAL-TO-3; SPACE SO - Revista Matematica Iberoamericana 2005 ;21(1):25-46 13324 UI - 1642 AU - Calzadilla O AU - Hernandez E AU - Larramendi EM AU - Caballero-Briones F AU - Zapata-Torres M AU - Melendez-Lira M AU - Zapata-Navarro A AD - Univ Havana, Fac Phys, IMRE, Havana 10400, CubaIPN, Unidad Altamira, CICATA, Altamira 89600, Tamaulipas, MexicoIPN, CINVESTAV, Dept Fis, San Pedro Zacatenco, MexicoCalzadilla, O, Univ Havana, Fac Phys, IMRE, Havana 10400, Cuba TI - Chemical bath deposited CdS films using magnetic treated solutions AB - CdS thin films were obtained by chemical bath deposition onto coming glass slides using precursor solutions previously treated in a steady magnetic field. The kinetic growth was affected in dependence of the magnetic field intensity used in the solution treatments. The growth rate is slower when magnetized solutions are used; however, the reaction exhaustion is more delayed. The magnetic treatments improve the conversion of starting materials in thin films. Thus, the bath is more efficient and thicker films can be obtained. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Cuba MH - Mexico|Distrito Federal MH - Mexico|Tamaulipas PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 1 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000230776400043 L2 - THIN-FILMS; PRECIPITATION; FIELD SO - Physica Status Solidi B-Basic Solid State Physics 2005 ;242(9):1933-1936 13325 UI - 1392 AU - Camacho-Bragado GA AU - Elechiguerra JL AU - Olivas A AU - Fuentes S AU - Galvan D AU - Yacaman MJ AD - Univ Texas, Dept Chem Engn, Austin, TX 78712, USAUniv Texas, Mat Inst, Austin, TX 78712, USAUNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoCamacho-Bragado, GA, Univ Texas, Dept Chem Engn, Austin, TX 78712, USA TI - Structure and catalytic properties of nanostructured molybdenum sulfides AB - A nanostructured form of molybdenum disulfide/dioxide was prepared by a two-step hydrothermal/gas phase reaction. The material was composed of a solid MoO2 core with MoS2+x, crystallites nucleating on its surface. Most of the MoS2+x, consisted of nanowires, which are 14 to 30 nm long and are about one MoS2 unit cell wide. High-resolution electron microscopy (HREM), electron diffraction, energy-dispersive X-ray spectroscopy (EDS), high-angle annular dark-field (HAADF) and X-ray diffraction were used to characterize the structure of the catalysts. The morphology does not depend strongly on the parent oxide, since both samples presented the oxide and sulfide phases; however, the abundance of nanowires depends on the thickness of the original oxide crystal. The catalytic activity and selectivity measurements of the resulting unsupported catalysts are also presented. In both samples, a higher selectivity for hydrogenation over sulfur removal was found. (c) 2005 Elsevier Inc. All rights reserved MH - Mexico|Baja California MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000231326200019 L2 - HREM;molybdenum sulfide nanowires;hydrotreating catalyst;IN-SITU DECOMPOSITION; HYDRODESULFURIZATION CATALYSTS; MOS2 NANOCLUSTERS; HYDROTREATING CATALYSTS; INORGANIC FULLERENES; LOW-TEMPERATURE; MOO3 NANOBELTS; DIESEL FUEL; MODEL; WS2 SO - Journal of Catalysis 2005 ;234(1):182-190 13326 UI - 1719 AU - Camacho-Bragado GA AU - Ortega-Aviles M AU - Velasco MA AU - Jose-Yacaman M AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USAUniv Autonoma Estado Mexico, Fac Quim, Toluca, MexicoMuseo Culturas Oaxaca, Oaxaca, MexicoCamacho-Bragado, GA, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - A microstructural study of gold treasure from Monte Alban's tomb 7 AB - This article presents a microstructural study of a set of samples from the treasure of tomb 7 of Monte Alban, Oaxaca, in southeast Mexico. The purpose of this work was to elucidate the manufacturing methods used by the pre-Columbian artisans of the Oaxaca valley. An additional goal was to establish a point of comparison between Mesoamerican cultures and cultures in some other regions of the Americas. Ten gilt samples were analyzed corresponding to the post-classic period (700-1300A.D). The microstructure and elemental composition of the samples were determined using optical, scanning, and transmission-electron microscopies and electron-energy-dispersive spectroscopy. The samples were classified by the method of manufacture. A predominant use of gold alloys was found, rather than the gilt copper commonly used by some cultures in South America MH - Mexico|Oaxaca MH - Mexico|Estado De Mexico MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Mineralogy;Mining & Mineral Processing U5 - J;Article AV - English IS - 1047-4838 UR - ISI:000230584700008 L2 - COPPER SO - Jom 2005 ;57(7):19-24 13327 UI - 2601 AU - Camacho-Camacho C AU - Biesemans M AU - Van Poeck M AU - Mercier FAG AU - Willem R AU - rriet-Jambert K AU - Jousseaume B AU - Toupance T AU - Schneider U AU - Gerigk U AD - Free Univ Brussels, Dept Polymer Sci & Struct Chem, High Resolut NMR Ctr, B-1050 Brussels, BelgiumUniv Autonoma Metropolitana, Unidad Xoxhimilco, Dept Sistemas Biol, Mexico City 04960, DF, MexicoUniv Bordeaux 1, UMR 5802, Chim Organ & Organomet Lab, F-33405 Talence, FranceCrompton GmbH, D-59180 Bergkamen, GermanyBiesemans, M, Free Univ Brussels, Dept Polymer Sci & Struct Chem, High Resolut NMR Ctr, Pleinlaan 2, B-1050 Brussels, Belgium TI - Alkylchlorotins grafted to cross-linked polystyrene beads by a -(CH2)(n)- spacer (n=4, 6, 11): Selective, clean and recyclable catalysts for transesterification reactions AB - Insoluble polystyrene grafted compounds of the type (P-H)((1-t)){P-(CH2)(n)SnBupCl3-p}(t), (P-H)((1-t)){P-(CH2)(n)SnBuO}(t) and (P-H)((1-t))[{P-(CH2)(n)SnBuCl}(2)O](t/2), in wich (P-H) is a cross-linked polystyrene; n = 4, 6, and 11; p=0 and 1; and t the degree of functionalisation, were synthesised from Amberlite XE-305, a polystyrene cross-linked with divinylbenzene. The compounds were characterised by using elemental analysis, and IR, Raman, solid-state Sn-117 NMR, and H-1 and Sn-119 high-resolution MAS NMR spectroscopy. The influence of the spacer length and the tin functionality on the catalytic activity of these compounds, as well as their recycling ability, was assessed in the transesterification reaction of ethyl acetate with various alcohols. These studies showed significant differences in the activity of the catalysts interpreted in terms of changes in the mobility of the catalytic centres. Some of the supported catalysts could be recycled at least seven times without noticeable loss of activity. The residual tin content in the reaction products was found to be as low as 3 ppm MH - Belgium MH - France MH - Germany MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 11 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0947-6539 UR - ISI:000228412500019 L2 - NMR spectroscopy;supported catalysts;tin leaching;tin;transesterification;DISTANNOXANE CATALYSTS; TRANS-ESTERIFICATION; INTERFACE; ACYLATION; ALCOHOLS SO - Chemistry-A European Journal 2005 ;11(8):2455-2461 13328 UI - 2491 AU - Camacho-Camacho CC AU - Biesemans M AU - Verbruggen I AU - Verbruggen I AU - Willem R AD - Free Univ Brussels, High Resolut NMR Ctr HNMR, Dept Polymer Sci & Struct Chem POSC, B-1050 Brussels, BelgiumUniv Autonoma Metropolitana, Dept Sistemas Biol, Unidad Xochimilco, Mexico City 04960, DF, MexicoBiesemans, M, Free Univ Brussels, High Resolut NMR Ctr HNMR, Dept Polymer Sci & Struct Chem POSC, Pl Laan 2, B-1050 Brussels, Belgium TI - Trinuclear tin salicylaldoximate cluster-catalyzed selective acylation of alcohols AB - The reactivity and catalytic potential of the tin salicylaldoximate cluster [(Me2Sn)2(Me2SnO)(OCH3) (HONZO)(ONZO)] (1), with HONZOH = o-HON=CH-C6H4OH, on the acylation reaction of various alcohols with ethyl acetate is reported. The catalyst is active toward primary and unhindered secondary alcohols, but inefficient toward tertiary and secondary bulky alcohols and phenols. A possible mechanism for the transesterification reaction catalyzed by 1, accounting for the influence of steric factors, is proposed. Copyright (c) 2005 John Wiley & Sons, Ltd MH - Belgium MH - Mexico|Distrito Federal PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0268-2605 UR - ISI:000228089400008 L2 - organotin catalyst;acylation;transesterification;X-RAY-DIFFRACTION; HINDERED ALCOHOLS; TRANSESTERIFICATION; ESTERIFICATION; OXIDE SO - Applied Organometallic Chemistry 2005 ;19(3):343-346 13329 UI - 510 AU - Camacho AG AU - Aguilera EF AU - Moro AM AD - Inst Nacl Invest Nucl, Dept Acelerador, Mexico City 11801, DF, MexicoUniv Sevilla, Dept FAMN, E-41080 Seville, SpainCamacho, AG, Inst Nacl Invest Nucl, Dept Acelerador, Apartado Postal 18-1027, Mexico City 11801, DF, Mexico TI - Simultaneous DWBA-description of elastic, fusion and 1n-transfer reactions on the system Be-9+Pb-208 for energies around the barrier energy AB - A distorted wave born approximation is applied to give a simultaneous description of elastic scattering, total reaction, fusion and one neutron transfer cross sections for the system Be-9 + Pb-208 at energies below and above the Coulomb barrier energy. In the approach, Woods-Saxon optical potentials are applied. For the entrance channel, the imaginary part W of the optical potential U is split into two parts; a volume part W-F which is responsible for fusion absorption and a surface part W-DR which accounts for direct reactions. The optical potential parameters are determined from a simultaneous chi(2)-analysis of recent experimental data of (a) elastic scattering and complete fusion and (b) elastic scattering and total fusion (complete + incomplete). In this manner, an account of a single alpha-particle partial fusion can be given. The one-neutron transfer cross section is determined with the same elastic distorted waves obtained from U. A search of the threshold anomaly is made for the real and imaginary parts of U although a no conclusive determination of it can be given. In general the results obtained in the calculations are in close agreement with the data. (c) 2005 Published by Elsevier B.V MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0375-9474 UR - ISI:000233507200002 L2 - nuclear reactions;exotic nuclei;threshold anomaly;HEAVY-ION SCATTERING; COULOMB BARRIER; POLARIZATION POTENTIALS; BREAKUP; NUCLEI; LI-6,LI-7+PB-208 SO - Nuclear Physics A 2005 ;762(3-4):216-229 13330 UI - 1747 AU - Camacho MA AU - Kar AK AU - Wherrett BS AU - Bakarezos M AU - Rangel-Rojo R AU - Yamada S AU - Matsuda H AU - Kasai H AU - Nakanishi H AD - Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, ScotlandUniv Autonoma Estado Mexico, Fac Med, Toluca Edo Mexico 50120, MexicoFdn Res & Technol, Inst Elect Struct & Laser, Iraklion 71110, Crete, GreeceCtr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoAIST, Photon Res Inst, Mol Photon Grp, Tsukuba, Ibaraki 3058565, JapanTohoku Univ, Inst Chem React Sci, Sendai, Miyagi 98077, JapanKar, AK, Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland TI - All-optical switching potentiality in Fabry-Perot devices containing poly-DCHD AB - The linear and nonlinear response of Fabry-Perot etalons containing a polymer microcrystal solution was studied using the pump-probe technique with a white-light continuum probe. The response was studied at wavelengths away from resonance (700-800 nm) when a near-resonant subpicosecond pump pulse (at 640 nm) was used. A theoretical model used to describe the F-P linear transmission is presented. A blue-shift of the F-P peaks induced by the pump-pulse was clearly observed in all the etalons studied, and the magnitude of the shifts is used to quantify the nonlinear response. The potential of these devices for all-optical switching applications is assessed through the figures of merit Wand T, and the recovery time of the nonlinearity. Refractive index changes as large as 1.2 x 10(-2) were measured and switching energies as low as 0.9 pJ were calculated at the F-P peaks. The nonlinear response was shown to have an ultrafast recovery, of around 2 ps. (c) 2005 Elsevier B.V. All rights reserved MH - Greece MH - Japan MH - Mexico|Baja California MH - Mexico|Estado De Mexico MH - United Kingdom PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Optics U5 - J;Article AV - English IS - 0030-4018 UR - ISI:000230353800017 L2 - POLYDIACETYLENE MICROCRYSTALS; NONLINEARITIES; ETALON; PTS SO - Optics Communications 2005 ;251(4-6):376-387 13331 UI - 1158 AU - Camargo-Gamboa GJ AU - Pacheco JSL AU - de Leon JM AU - Conradson SD AU - Hernandez-Calderon I AD - CINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoLos Alamos Natl Lab, Struct & Properties Grp, Los Alamos, NM 87545, USACINVESTAV, Dept Fis, Mexico City 07000, DF, MexicoPacheco, JSL, CINVESTAV, Dept Fis Aplicada, AP 73, Merida 97310, Yucatan, Mexico TI - Local structural characterization of Zn : Cd : Se ternary semiconductors AB - We have studied the local atomic structure around Zn and Cd, in CdSe, ZnSe, and ordered and disordered Zn0.5Cd0.5Se thin films, grown by molecular beam epitaxy (MBE) and atomic layer epitaxy (ALE) using X-ray absorption spectroscopy (XAS). Zn K-shell X-ray absorption fine structure (XAFS) shows that the Zn-Se pair nearest neighbor distance is the same in both ordered and disordered ternary samples. This result shows that the ordered (or disordered growth) does not have a significant effect in the nearest neighbor Zn environment. However, results from K-shell Cd XAFS show that the U-Se pair nearest neighbor distance in the Zn0.5Cd0.5Se ordered film exhibits a contraction compared to the same pair distance in the disordered Zn0.5Cd0.5Se sample and the binary CdSe compound. This suggests that the shortest Zn-Se nearest neighbor distance regulates the Zn-Se nearest neighbor distance in the ternary compounds, when these are grown in an ordered, layer by layer, fashion. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000231843200011 L2 - ternary semiconductors;local atomic structure;Zn : Cd : Se;XAFS;LASER-DIODES; DEPENDENCE SO - Thin Solid Films 2005 ;490(2):165-167 13332 UI - 2651 AU - Campan EDM AU - Callejas A AU - Rahier M AU - Benrey B AD - Univ Neuchatel, LEAE, Inst Zool, CH-2007 Neuchatel, SwitzerlandUniv Picardie, Lab Biol Entomophages, Amiens, FranceUniv Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoBenrey, B, Univ Neuchatel, LEAE, Inst Zool, Emile Argand 11,Case Postale 2, CH-2007 Neuchatel, Switzerland TI - Interpopulation variation in a larval parasitoid of bruchids, Stenocorse bruchivora (Hymenoptera : Braconidae): Host plant effects AB - For parasitoids of herbivores, the two most important biotic factors that will influence their fitness are the host species that they attack and the plant species that the host feeds on. Variation in these two trophic levels because of different habitat characteristics may largely drive the evolution of the interaction between parasitoids and their hosts. Through transplant experiments with three plant-insect populations in Mexico, we examined the consequences of plant variation for the interaction between a bruchid beetle, Zabrotes subfasciatus (Boheman) (Coleoptera: Bruchidae), that feeds on bean seeds of the genus Phaseolus L. (Leguminosae: Phaseolinae) and one of its main parasitoids, Stenocorse bruchivora (Crawford) (Hymenoptera: Braconidae). Results revealed great variation in performance among parasitoid populations. Both the population of origin of the parasitoid and of the host plant influenced the performance of developing parasitoids as well as adult oviposition behavior. Wasps from the Atila population were more likely to parasitize the herbivore and developed faster than wasps from the other two populations, Malinalco and Tepoztlan. The results call be explained in part by the spatial distribution of the host plant, host availability, and seed quality in this population. Variation in performance among parasitoid populations decreased when wasps were exposed to their host in cultivated seeds. This could be caused by the better and less variable quality of this novel resource, and consequently, of the bruchid host. The results from this study indicate that both host plant quality and genetic variation among populations are crucial factors in determining the nature and evolution of the interaction between parasitoids and their herbivorous hosts MH - France MH - Mexico|Distrito Federal MH - Switzerland PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 1 U4 - Entomology U5 - J;Article AV - English IS - 0046-225X UR - ISI:000228262000026 L2 - Phaseolus vulgaris;bruchids;genetic variation;tri-trophic interactions;parasitoid;COTESIA-CONGREGATA SAY; SEX-RATIO; TROPHIC LEVELS; FRUIT ODOR; HERBIVORE; WASP; DROSOPHILA; BEHAVIOR; SIZE; ADAPTATION SO - Environmental Entomology 2005 ;34(2):457-465 13333 UI - 956 AU - Campbell CJ AU - Aureli F AU - Chapman CA AU - Ramos-Fernandez G AU - Matthews K AU - Russo SE AU - Suarez S AU - Vick L AD - Pomona Coll, Dept Anthropol, Claremont, CA 91711, USALiverpool John Moores Univ, Sch Biol & Earth Sci, Liverpool L3 5UX, Merseyside, EnglandUniv Florida, Dept Zool, Gainesville, FL 32611, USAPronatura Peninsula Yucatan, Merida, Yucatan, MexicoUniv Illinois, Dept Anim Biol, Urbana, IL 61801, USASUNY Stony Brook, Dept Anthropol, Stony Brook, NY 11794, USAPeace Coll, Raleigh, NC, USACampbell, CJ, Pomona Coll, Dept Anthropol, 420 N Harvard Ave, Claremont, CA 91711 USA TI - Terrestrial behavior of Ateles spp AB - Spider monkeys (Ateles spp.) are well known for their highly arboreal lifestyle, spending much of their time in the highest levels of the canopy and rarely venturing to the ground. To investigate terrestriality by Ateles and to illuminate the conditions under which spider monkeys venture to the ground, we analyzed ad libitum data from 5 study sites, covering 2 species and 5 subspecies. Three of the sites are in Central/North America: Barro Colorado Island (BCI), Panama (Ateles geoffroyi panamensis), Santa Rosa National Park, Costa Rica (A. g. frontatus), and Punta Laguna, Mexico (A. g. yucatanensis). The 2 remaining sites are in South America: Cocha Cashu Biological Station, Peru (A. belzebuth chamek) and Yasuni National Park, Ecuador (A. b. belzebuth). Terrestrialism by Ateles at all sites is rare; however, it is more restricted at the 2 South American sites. In South America, ground use only occurred in the contexts of eating soil or rotten wood and visiting salt licks. In contrast at the 3 sites with Ateles geoffroyi it rarely occurred in a feeding context, but instead more frequently while drinking from streams during the dry season, by adult females escaping attack by adult males, and as part of a chase game. In addition, on BCI adult males were on the ground before attacking adult females. We discuss potential explanations, e.g., climate, species differences, predation pressure, for the differences between the Central/North and South American observations MH - USA MH - United Kingdom MH - Mexico|Yucatan PB - NEW YORK: SPRINGER/PLENUM PUBLISHERS RP - NOT IN FILE U3 - TC 5 U4 - Zoology U5 - J;Article AV - English IS - 0164-0291 UR - ISI:000232497700004 L2 - terrestrial behavior;predation;spider monkeys;Ateles;POSITIONAL BEHAVIOR; MONKEYS; GEOPHAGY; AMAZONIA; PATTERNS; PANISCUS; ALOUATTA SO - International Journal of Primatology 2005 ;26(5):1039-1051 13334 UI - 475 AU - Campos-Davila L AU - Cruz-Escalona VH AU - Galvan-Magana F AU - bitia-Cardenas A AU - Gutierrez-Sanchez FJ AU - Balart EF AD - Ctr Invest Biol Noroeste, Lab Ictiol, La Paz 23090, Baja Calif Sur, BoliviaInst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Dept Pesqueria & Biol Marina, La Paz 23000, Baja California, MexicoCampos-Davila, L, Ctr Invest Biol Noroeste, Lab Ictiol, AP 128, La Paz 23090, Baja Calif Sur, Bolivia TI - Fish assemblages in a Gulf of California marine reserve AB - Fish assemblages at the Loreto Marine Reserve at Loreto Bay, Baja California Sur were studied from February 1997 to February 1998. We sampled a variety of habitats at eight sites. The most important species were determined according to abundance, frequency of occurrence, and weight. Specific richness, diversity, and evenness also were calculated. Cluster and canonical correspondence analyses were used to evaluate variance of environmental and ecological variables. Sixty-six fish species belonging to 36 families were collected during the study. The most common species were Mulloidichthys dentatus, Microlepidotus inornatus, Haemulon flaviguttatum, Caranx caballus, Scomber japonicus, and Scomberomorus sierra. Species richness was higher during the warm season. Cluster analysis produced three groups (57% similarity): Group 1 was dominated by S. sierra and Ariopsis platypogon; Group 2 was dominated by C. caballus, H. flaviguttatum, H. sexfasciatum, Kyphosus elegans, Lutjanus argentiventris, and M. dentatus; and Group 3 consisted of a fish assemblage with only a few species at the Juncalito Island location. The pattern of change in community structure at the different sites was not correlated with environmental parameters. Fish diversity of the Loreto Marine Reserve is intermediate with respect to other areas in the Gulf of California and other reef fish communities in the world, and our results provide baseline information for this reserve. However, quantitative studies on species densities and size structures, and on settlement and recruitment processes, are essential for creating appropriate reserve management plans MH - Bolivia MH - Mexico|Baja California PB - MIAMI: ROSENSTIEL SCH MAR ATMOS SCI RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0007-4977 UR - ISI:000233743900002 L2 - BIODIVERSITY; DIVERSITY; MEXICO; CONSERVATION; VARIABILITY; COMMUNITY; DEPTH; SCALE; BASIN; SUR SO - Bulletin of Marine Science 2005 ;77(3):347-362 13335 UI - 1029 AU - Campos-Delgado DU AU - Martinez-Martinez S AU - Zhou K AD - Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78290, SLP, MexicoUniv Autonoma San Luis Potosi, Fac Ingn, CIEP, San Luis Potosi 78290, SLP, MexicoLouisiana State Univ, Dept Elect & Comp Engn, Baton Rouge, LA 70803, USACampos-Delgado, DU, Univ Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78290, SLP, Mexico TI - Integrated fault-tolerant scheme for a DC speed drive AB - In this paper, an active fault-tolerant control (FTC) scheme is presented with disturbance compensation. Fault-detection and compensation are merged together to propose a robust algorithm against model uncertainties. The GIMC control architecture [23] is used as a feedback configuration for the active fault-tolerant scheme. The synthesis procedure for the parameters of the fault-tolerant scheme is carried out by using tools of robust control theory. A detection filter is designed for fault isolation taking into account uncertainties and disturbances in the mathematical model. Finally, the fault compensation strategy incorporates an estimate of the disturbances into the system to improve the performance of the closed-loop systems after the fault is detected. In order to illustrate these ideas, the speed regulation of a dc motor is selected as a case study, and experimental results are reported MH - Mexico|San Luis Potosi MH - USA PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 0 U4 - Automation & Control Systems;Engineering, Manufacturing;Engineering, Electrical & Electronic;Engineering, Mechanical U5 - J;Article AV - English IS - 1083-4435 UR - ISI:000232211000010 L2 - DC motor;fault-tolerant control;H-infinity design;robust control;DYNAMIC-SYSTEMS; FREQUENCY-DOMAIN; ROBUST; STABILIZATION; H(INFINITY); DESIGN SO - Ieee-Asme Transactions on Mechatronics 2005 ;10(4):419-427 13336 UI - 1771 AU - Campos-Guillen J AU - Bralley P AU - Jones GH AU - Bechhofer DH AU - Olmedo-Alvarez G AD - CINVESTAV, Dept Ingn Genet Plantas, Unidad Irapuato, Irapuato 36500, MexicoEmory Univ, Dept Biol, Atlanta, GA 30322, USAMt Sinai Sch Med, Dept Pharmacol & Biol Chem, New York, NY 10029, USAOlmedo-Alvarez, G, CINVESTAV, Dept Ingn Genet Plantas, Unidad Irapuato, U Irapuato,AP 629,Gto CP36500, Irapuato 36500, Mexico TI - Addition of poly(A) and heteropolymeric 3 ' ends in Bacillus subtilis wild-type and polynucleotide phosphorylase-deficient strains AB - Polyadenylation plays a role in decay of some bacterial mRNAs, as well as in the quality control of stable RNA. In Escherichia coli, poly(A) polymerase I (PAP I) is the main polyadenylating enzyme, but the addition of 3' tails also occurs in the absence of PAP I via the synthetic activity of polynucleotide phosphorylase (PNPase). The nature of 3'-tail addition in Bacillus subtilis, which lacks an identifiable PAP I homologue, was studied. Sizing of poly(A) sequences revealed a similar pattern in wild-type and PNPase-deficient strains. Sequencing of 152 cloned cDNAs, representing 3'-end sequences of nontranslated and translated RNAs, revealed modified ends mostly on incomplete transcripts, which are likely to be decay intermediates. The 3'-end additions consisted of either short poly(A) sequences or longer heteropolymeric ends with a mean size of about 40 nucleotides. Interestingly, multiple independent clones exhibited complex heteropolymeric ends of very similar but not identical nucleotide sequences. Similar polyadenylated and heteropolymeric ends were observed at 3' ends of RNA isolated from wild-type and pnpA mutant strains. These data demonstrated that, unlike the case of some other bacterial species and chloroplasts, PNPase of Bacillus subtilis is not the major enzyme responsible for the addition of nucleotides to RNA 3' ends MH - Mexico|Guanajuato MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 6 U4 - Microbiology U5 - J;Article AV - English IS - 0021-9193 UR - ISI:000230350500002 L2 - MESSENGER-RNA DEGRADATION; ESCHERICHIA-COLI; STREPTOMYCES-COELICOLOR; IN-VIVO; POLYMERASE I; POLYADENYLATION; DECAY; GENE; SITE; IDENTIFICATION SO - Journal of Bacteriology 2005 ;187(14):4698-4706 13337 UI - 304 AU - Canet C AU - Prol-Ledesma RM AU - Proenza JA AU - Rubio-Ramos MA AU - Forrest MJ AU - Torres-Vera MA AU - Rodriguez-Diaz AA AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08007 Barcelona, SpainInst Potosino Invest Cient & Tecnol, San Luis Potosi 78216, MexicoUniv Nacl Autonoma Mexico, Fac Ingn, Mexico City 04510, DF, MexicoCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico TI - Mn-Ba-Hg mineralization at shallow submarine hydrothermal vents in Bahia Concepcion, Baja California Sur, Mexico AB - Coastal submarine hydrothermal venting occurs on the west shore of the fault-bounded bay of Bahia Concepcion, along a stretch of about 700 in of rocky shoreline. Diffuse hydrothermal seepage of water and continuous gas bubbling (mainly CO2 and N-2) take place through the sediment-covered seafloor at shallow depth (5 to 15 in). In addition, at about 500 in SE, a cluster of hot springs occurs within the intertidal zone. The temperature and pH of the hydrothermal fluids varies from 72 to 87 degrees C and 5.95 to 6.02 in the submarine diffuse venting area and reaches 62 degrees C and pH of 6.68 in the intertidal hot springs. Mn-Ba-Hg mineralization is presently forming as a result of the hydrothermal venting. At the intertidal hot springs, moss-like crusts of manganese oxides and structureless detrital aggregates cemented by opal-A, barite and calcite occur around the main discharge conduits. These aggregates are overlaid by silica-carbonate fine-layered stromatolitic aggregates that extend some meters from the hot springs forming crusts and coalescing rims over volcanic pebbles and boulders. Manganese crusts are made up of barium rich, X-ray-amorphous todorokite-like and romanechite phases, and represent a rare example of a manganese deposit formed in a shallow submarine hydrothermal environment. In the submarine diffuse venting area the hydrothermal precipitates are less conspicuous and consist in millimeter-thick iron oxyhydroxide coatings on volcanic cobbles and boulders. These coatings are composed of poorly crystallized six-line ferrihydrite, accompanied by minor cinnabar and fine-grained colloform pyrite. Textures and fabrics of the mineral assemblages suggest microbial mediation for mineral deposition. The vent precipitates display a significant enrichment of Hg, As and Sb. Arsenic is probably adsorbed onto Mn- and Fe-oxide substrates. The NASC (North American Shale Composite)-normalized REE patterns of the vent precipitates show a pronounced positive Eu anomaly that is probably inherited from the hydrothermal fluid. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|San Luis Potosi MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 7 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0009-2541 UR - ISI:000234118800007 L2 - hydrothermal coastal vents;Fe oxyhydroxide;manganese oxides;stromatolites;cinnabar;EAST PACIFIC RISE; CENTRAL OKINAWA TROUGH; PAPUA-NEW-GUINEA; NEW-ZEALAND; CARBONATE DEPOSITS; SOUTHWEST PACIFIC; IRON-OXIDES; LAU BASIN; SILICA; GEOCHEMISTRY SO - Chemical Geology 2005 ;224(1-3):96-112 13338 UI - 373 AU - Canet C AU - Alfonso P AU - Melgarfjo JC AU - Fallick AE AD - Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, MexicoCSIC, Inst Ciencies Terra Jaume Almera, E-08028 Barcelona, SpainUniv Barcelona, Dept Cristallog Mineral & Diposits Minerals, E-08028 Barcelona, SpainScottish Univ, Environm Res Ctr, Isotope Geosci Unit, Glasgow G75 0QF, Lanark, ScotlandCanet, C, Natl Autonomous Univ Mexico, Inst Geofis, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Stable isotope geochemistry of the carboniferous Zn-Pb-Cu sediment-hosted sulfide deposits, northeastern Spain AB - Carboniferous sedimentary rocks in the southwestern Catalonian Coastal Ranges contain stratiform (Zn, Pb, Cu) sulfide deposits. Stable isotope compositions of sulfur, oxygen, and hydrogen were studied in five localities in order to establish the source of hydrothermal fluids and the influence of metamorphism on these deposits. Sulfur isotopes were analyzed in pyrrholite, pyrite, sphalerite, chalcopyrite, and galena. The delta(31)S(CDT) values lie mostly between -1.0 and +7.0 parts per thousand (average +4.4 parts per thousand). Except for pyrrhotite-pyrite pairs, all the sulfide minerals show isotopic disequilibrium. delta(31)S values suggest that sulfur was derived by thermochemical reduction Of Seawater Sulfate in a deep-circulating convective system. Fluid inclusions were Studied in quartz crystals from the sediment-hosted stratiform occurrences. They are two-phase (L-V), with salinity between 1.1 and 18.0 wt% NaCl eq.. and homogenization temperatures mainly in the range of 220-260 degrees C. Oxygen and hydrogen isotopes were analyzed in chlorite crystals from four ore-bearing beds. delta D(V-SMOW) values in chlorite range from -63 to -33 parts per thousand, N hereas delta(18)O values lie between +2.7 and +6.8 parts per thousand. delta(18)O((V-SMOW)), values in quartz range between +8.4 and +10.7 parts per thousand. Most of the calculated oxygen and hydrogen isotope compositions of ore-forming fluids plot close to the isotopic composition of seawater. Therefore. the ore-forming fluid must have been mainly seawater that interacted with sedimentary rocks during convective circulation within a basin. This process took place in a subsiding Carboniferous basin divided into sedimentary highs and depressions by synsedimentary normal faults, which acted as permeable areas that favored fluid circulation MH - Mexico|Distrito Federal MH - United Kingdom MH - Spain PB - PALM BEACH: V H WINSTON & SON INC RP - NOT IN FILE U3 - TC 0 U4 - Geology U5 - J;Article AV - English IS - 0020-6814 UR - ISI:000233948000005 L2 - PRADES MOUNTAINS CATALONIA; SULFUR ISOTOPE; SULFATE REDUCTION; FLUID INCLUSION; COASTAL RANGES; LEAD; GENESIS; FRACTIONATION; AUSTRALIA; OCCURRENCES SO - International Geology Review 2005 ;47(12):1298-1315 13339 UI - 2909 AU - Canet C AU - Prol-Ledesma RM AU - Torres-Alvarado I AU - Gilg HA AU - Villanueva RE AU - Cruz RLS AD - Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Ctr Invest Energia, Temixco, Morelos, MexicoTech Univ Munich, Lehrstuhl Ingn Geol, D-8000 Munich, GermanyUniv Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoCanet, C, Univ Nacl Autonoma Mexico, Inst Geofis, Cd Univ, Mexico City 04510, DF, Mexico TI - Silica-carbonate stromatolites related to coastal hydrothennal venting in Bahia Concepcion, Baja California Sur, Mexico AB - Submarine diffused seepage (from 5 to 15 in depth) and intertidal focused gasohydrothermal venting take place on the West shore of the Bahia Concepcion Bay, on Baja California, Mexico. The intertidal venting consists of a cluster of hot springs that occur a few meters offshore, with vent temperatures up to 62degreesC and a pH of 6.68. Two irregularly shaped patches of silica-carbonate hot spring deposits occur around the main intertidal vent areas. In addition, a fossil bed of silica-carbonate hot spring deposits of about 75 in long crops out along a cliff next to the active vent area. Both fossil and modem silica-carbonate deposits are finely laminated, and form columnar, bulbous and smooth undulating microstromatolites up to 10 cm thick. Noncrystalline opal-A is the only silica phase present in the modem and fossil hot spring deposits and occurs as microspheres up to 300 nm in diameter forming porous aggregates and irregular clusters, chains and spongy filament networks. The silica supersaturation state of the thermal fluid necessary for opal precipitation is achieved by cooling when it reaches the surface. The presence of preserved microbial remains (diatoms and possibly filamentous microbes) in both modem and fossil deposits reflects the biological activity around the hot springs. The biological activity constrains the fabrics and the textures of the deposit, and could mediate silica deposition. Calcite is the most abundant crystalline phase in the hot spring deposits and forms discontinuous horizons of subhedral bladed crystals within the silica aggregates. Calcite crystals are unusually enriched in C-13, With delta(13)C(V-PDB) values between +3.0parts per thousand and +9.3parts per thousand. The large C-13 enrichment is attributable to a geothermal CO2 degassing process, which yields calcite supersaturation. The delta(18)O(V-PDB) values in calcite, between -10.0parts per thousand and -6.6parts per thousand, indicate precipitation from a hot spring fluid that is a mixture of seawater and meteorically derived water. With the methods applied in this study, no indication of biogenic influence on calcite precipitation has been found. Minor amounts of barite occur in the fossil and modem hot spring deposits and precipitates when Ba2+-rich thermal water mixes with seawater. (C) 2004 Elsevier B.V. All rights reserved MH - Germany MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Geology U5 - J;Article AV - English IS - 0037-0738 UR - ISI:000227374600004 L2 - shallow hydrothermal vents;microbialites;sinter;travertine;opal-A;carbon isotopes;oxygen isotopes;YELLOWSTONE-NATIONAL-PARK; MAMMOTH-HOT-SPRINGS; NEW-ZEALAND; NORTH-ISLAND; DEPOSITIONAL FACIES; PRECIPITATION; USA; CALCITE; SINTERS; LAKE SO - Sedimentary Geology 2005 ;174(1-2):97-113 13340 UI - 1629 AU - Canhao PC AU - Ferro JM AU - Lindgren AG AU - Bousser MG AU - Stam J AU - Barinagarrementeria F AD - Hosp Santa Maria, Dept Neurosci & Mental Hlth, P-1649035 Lisbon, PortugalUniv Lund Hosp, Dept Neurol, S-22185 Lund, SwedenHop Lariboisiere, Dept Neurol, F-75475 Paris, FranceUniv Amsterdam, Acad Med Ctr, Dept Neurol, NL-1105 AZ Amsterdam, NetherlandsInst Nacl Neurol & Neurocirurgia, Dept Neurol, Mexico City, DF, MexicoCanhao, PC, Hosp Santa Maria, Dept Neurosci & Mental Hlth, P-1649035 Lisbon, Portugal TI - Causes and predictors of death in cerebral venous thrombosis AB - Background and Purpose - The causes of death of patients with cerebral venous thrombosis (CVT) have not been systematically addressed in previous studies. We aimed to analyze the causes and predictors of death during the acute phase of CVT in the International Study on Cerebral Vein and Dural Sinus Thrombosis (ISCVT) to identify preventable or treatable causes. Methods - ISCVT is a multinational, prospective, observational study including 624 patients with CVT occurring between May 1998 and May 2001, in which 27 patients (4.3%) died during the acute phase, 21 (3.4%) within 30 days from symptom onset. Inclusion forms and a questionnaire assessing the causes of death were analyzed. A logistic regression analysis was performed to identify the predictors of death within 30 days from symptom onset of CVT. Results - Median time between onset of symptoms and death was 13 days and between diagnosis and death, 5 days. Causes of death were mainly transtentorial herniation due to a unilateral focal mass effect (10 patients) or to diffuse edema and multiple parenchymal lesions (10 patients). Independent predictors of death were coma (odds ratio [OR], 8.8; 95% confidence interval [CI], 2.8 to 27.7), mental disturbance (OR, 2.5; 95% CI 0.9 to 7.3), deep CVT thrombosis (OR, 8.5; 95% CI, 2.6 to 27.8), right intracerebral hemorrhage (OR, 3.4; 95% CI, 1.1 to 10.6), and posterior fossa lesion (OR, 6.5; 95% CI, 1.3 to 31.7). Worsening of previous focal or de novo focal deficits increased the risk of death. Conclusions - The main causes of acute death were neurologic, the most frequent mechanism being transtentorial herniation MH - France MH - Mexico|Distrito Federal MH - Netherlands MH - Portugal MH - Sweden PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 18 U4 - Clinical Neurology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0039-2499 UR - ISI:000230817600018 L2 - cerebral veins;cerebrovascular circulation;death;models, statistical;prognosis;sinus thrombosis;DURAL SINUS THROMBOSIS; HEPARIN TREATMENT; PULMONARY-EMBOLISM; VEIN; PROGNOSIS SO - Stroke 2005 ;36(8):1720-1725 13341 UI - 3309 AU - Canizales-Quinteros S AU - guilar-Salinas CA AU - Huertas-Vazquez A AU - Ordonez-Sanchez ML AU - Rodriguez-Torres M AU - Venturas-Gallegos JL AU - Riba L AU - Ramirez-Jimenez S AU - Salas-Montiel R AU - Medina-Palacios G AU - Robles-Osorio L AU - Miliar-Garcia A AU - Rosales-Leon L AU - Ruiz-Ordaz BH AU - Zentella-Dehesa A AU - Ferre-D'Amare A AU - Gomez-Perez FJ AU - Tusie-Luna MT AD - Univ Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Biol Mol & Med Genom, Mexico City 14000, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Endocrinol & Metab Lipidos, Mexico City 14000, DF, MexicoUniv Nacl Autonoma Mexico, Inst Fisiol Celular, Dept Biol Celular, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Biomed, Dept Mol Biol & Biotechnol, Mexico City 14000, DF, MexicoInst Politecn Nacl, Escuela Super Med, Secc Estudios Posgrado & Invest, Mexico City, DF, MexicoFred Hutchinson Canc Res Ctr, Div Basic Sci, Seattle, WA 98104, USACanizales-Quinteros, S, Univ Nacl Autonoma Mexico, Inst Invest Biomed, Unidad Biol Mol & Med Genom, Vasco Quiroga 15 Colonia Secc 16, Mexico City 14000, DF, Mexico TI - A novel ARH splice site mutation in a Mexican kindred with autosomal recessive hypercholesterolemia AB - Autosomal recessive hypercholesterolemia (ARH) is characterized by elevated LDL serum levels, xanthomatosis, and premature coronary artery disease. Three loci have been described for this condition (1p35, 15q25-q26 and 13q). Recently, the responsible gene at the 1p35 locus, encoding an LDL receptor adaptor protein (ARH) has been identified. We studied a Mexican ARH family with two affected siblings. Sequence analysis of the ARH gene (1p35 locus) revealed that the affected siblings are homozygous for a novel mutation (IVS4+2T>G) affecting the donor splice site in intron 4, whereas both the parents and an unaffected sister are heterozygous for this mutation. The IVS4+2T>G mutation results in a major alternative transcript derived from a cryptic splice site, which carries an in-frame deletion of 78 nucleotides in the mature mRNA. The translation of this mRNA yields a mutant protein product (ARH-26) lacking 26 amino acids, resulting in the loss of beta-strands beta6 and beta7 from the PTB domain. This is the first case where a naturally occurring mutant with an altered PTB domain has been identified MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 4 U4 - Genetics & Heredity U5 - J;Article AV - English IS - 0340-6717 UR - ISI:000226552200014 L2 - HUMAN APOLIPOPROTEIN-E; FAMILIAL HYPERCHOLESTEROLEMIA; MOLECULAR-MECHANISMS; SEQUENCE ALIGNMENT; GENETIC-ANALYSIS; PROTEIN; RECEPTOR; DATABASE; RNA; EXPRESSION SO - Human Genetics 2005 ;116(1-2):114-120 13342 UI - 1431 AU - Canizares-Macias MD AU - Garcia-Mesa JA AU - de Castro MDL AD - Natl Autonomous Univ Mexico, Fac Chem, Dept Analyt Chem, Mexico City 04510, DF, MexicoUniv Cordoba, Dept Analyt Chem, Cordoba, SpainCanizares-Macias, MD, Natl Autonomous Univ Mexico, Fac Chem, Dept Analyt Chem, Mexico City 04510, DF, Mexico TI - Ultrasound or focused-microwave energy for accelerating the determination of the oxidative stability of oils MH - Mexico|Distrito Federal MH - Spain PB - SHELTON: INT SCIENTIFIC COMMUN INC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical;Instruments & Instrumentation U5 - J;Article AV - English IS - 0044-7749 UR - ISI:000231466200003 L2 - EDIBLE OILS; OLIVE OIL; FLOW-INJECTION; EXTRACTION; PERFORMANCE; FOODS; RANCIDITY; WINE SO - American Laboratory 2005 ;37(17):14-+ 13343 UI - 3051 AU - Canizo-Cabrera A AU - Li SC AU - Shu MF AU - Lee JM AU - Garcia-Vazquez V AU - Chen CC AU - Wu JC AU - Takahashi A AU - Wu TH AD - Natl Yunlin Univ Sci & Technol, Taiwan SPIN Res Ctr, Touliu 640, JapanUniv Autonoma Puebla, Inst Fis Luis Rivera Terrazas, Puebla 72570, MexicoNatl Changhua Univ Educ, Dept Phys, Changhua 500, TaiwanTohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, JapanWu, TH, Natl Yunlin Univ Sci & Technol, Taiwan SPIN Res Ctr, Touliu 640, Japan TI - Local current distribution and electrical properties of a magnetic tunnel junction using conducting atomic force microscopy AB - Local topographical and electrical properties were simultaneously measured for a magnetic tunnel junction formed by Ta (50 Angstrom)/Ni-Fe (20 Angstrom)/Cu (50 Angstrom)/Mn-75 Ir-25 (100 Angstrom)/Co70Fe30(40 Angstrom)/Al-O (8-15 Angstrom)/Co70Fe30 (40 Angstrom)/Ni-Fe (100 Angstrom)/Ta (50 Angstrom). Local current-voltage (I-V) characteristic curves were obtained for different contrast levels in the electrical current distribution images on the test sample. With the purpose of obtaining quantitative values for the barrier characteristics, data was analyzed by the Simmons' equation from -1.0 to 1.0 V. The magnetoresistance ratio values were estimated to be 35.02%, with a bias voltage of 0.36 V, when applying a magnetic field of +/- 200 Oe. In addition, a study on the ramping effect on the dielectric tunneling capacitance and analytical resistance-capacitance (RC) model were carried out MH - Japan MH - Mexico|Puebla MH - Taiwan PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9464 UR - ISI:000227134600063 L2 - conductive atomic force microscopy (CAFM);dielectric tunnel capacitance;local electric transport;magnetic tunnel junction;magnetoresistance ratio;ramping effect;RC model;LINE SLOT ANTENNA; RECEPTION; PLASMA SO - Ieee Transactions on Magnetics 2005 ;41(2):887-891 13344 UI - 1807 AU - Cano-Aguilera I AU - Haque N AU - Morrison GM AU - guilera-Alvarado AF AU - Gutierrez M AU - Gardea-Torresdey JL AU - de la Rosa G AD - Univ Guanajuato, Fac Quim, Guanajuato 36050, MexicoChalmers Univ Technol, Water Environm Transport Dept, SE-41296 Gothenburg, SwedenUniv Texas, Dept Chem, El Paso, TX 79968, USACano-Aguilera, I, Univ Guanajuato, Fac Quim, Noria Alta S-N, Guanajuato 36050, Mexico TI - Use of hydride generation-atomic absorption spectrometry to determine the effects of hard ions, iron salts and humic substances on arsenic sorption to sorghum biomass AB - At present, there is a great interest in studying new sorbent materials for the removal of arsenic from aqueous solutions because of its high toxicity and adverse effects on human health. In previous research, sorghum biomass was found to be an efficient and economic sorbent for the removal of arsenic from aqueous solutions. In this investigation, the effects of CaCl2, MgCl2, FeSO4, MgSO4, Fe(NO3)(3), and humic substances (peat moss, humin and humic acids) on arsenic binding to sorghum biomass were evaluated. Among these compounds, only iron salts were found to positively increase the sorption of arsenic to sorghum biomass. In addition, the sorption equilibrium was reached faster when the reaction mixture contained iron salts. However, an overall reduction of 21% of arsenic sorption to sorghum biomass was observed in the presence of MgSO4. This interference may be due to the presence of sulfate ions, instead of the hard cations, that could be in competition with As for the same interaction sites or ligands. Peat moss, humins and humic acid, extracted from sphagnum peat moss, significantly decreased the arsenic sorption to sorghum biomass. (c) 2005 Elsevier B.V All rights reserved MH - Mexico|Guanajuato MH - Sweden MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0026-265X UR - ISI:000230264500011 L2 - arsenic sorption interferences;sorghum biomass;HG-AAS;HEAVY-METALS; REMOVAL; BIOSORPTION; WATER; ADSORPTION; OXIDATION; KINETICS; PEAT SO - Microchemical Journal 2005 ;81(1):57-60 13345 UI - 1098 AU - Canteros CE AU - Zuiani MF AU - Ritacco V AU - Perrotta DE AU - Reyes-Montes MR AU - Granados J AU - Zuniga G AU - Taylor ML AU - Davel G AD - ANLIS Dr Carlos Malbran, INEI, Dept Micol, RA-1281 Buenos Aires, DF, ArgentinaConsejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, ArgentinaUniv Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City 14000, DF, MexicoEscuela Nacl Ciencias Biol, Inst Politecn Nacl, Dept Zool, Mexico City 11340, DF, MexicoCanteros, CE, ANLIS Dr Carlos Malbran, INEI, Dept Micol, Av Velez Sarsfield 563, RA-1281 Buenos Aires, DF, Argentina TI - Electrophoresis karyotype and chromosome-length polymorphism of Histoplasma capsulatum clinical isolates from Latin America AB - Intact chromosomes of 19 clinical isolates of Histoplasma capsulatum recently obtained in Argentina, Mexico and Guatemala and the laboratory reference strain G186B from Panama were analyzed using pulsed-field gel electrophoresis. Chromosomal banding patterns of the human isolates revealed 5-7 bands, ranging from 1.3 to 10 Mbp in size. Strain G186B showed five bands of approximately 1.1, 2.8, 3.3, 5.4 and 9.7 Mbp. Thirteen different electrokaryotypes were identified, indicating that the genome of IT capsulatum varies widely in nature, as observed previously in laboratory strains. No definite association was found between electrokaryotype and geographical or clinical source. (c) 2005 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved MH - Argentina MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 2 U4 - Immunology;Infectious Diseases;Microbiology U5 - J;Article AV - English IS - 0928-8244 UR - ISI:000232192600009 L2 - Histoplasma capsulatum;karyotyping;pulsed-field gel electrophoresis;chromosomes;PARACOCCIDIOIDES-BRASILIENSIS; FUNGI SO - Fems Immunology and Medical Microbiology 2005 ;45(3):423-428 13346 UI - 2298 AU - Canto-Canche BB AU - Meijer AH AU - Collu G AU - Verpoorte R AU - Loyola-Vargas VM AD - Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Yucatan 97200, CP, MexicoInst Mol Plant Sci, NL-2333 AL Leiden, NetherlandsLeiden Univ, Leiden Inst Chem, NL-2300 RA Leiden, NetherlandsLoyola-Vargas, VM, Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Calle 43 130,Col Chuburna Hidalgo, Yucatan 97200, CP, Mexico TI - Characterization of a polyclonal antiserum against the monoterpene monooxygenase, geraniol 10-hydroxylase from Catharanthus roseus AB - Geraniol 10-hydroxylase (G10H) is a P450 containing enzyme which is the first committed step in the biosynthesis of monoterpene indole alkaloids (MIAs), including the Catharanthus roseus-anticancer drugs vinblastine and vincristine. It is thought that G10H has a regulatory rote in MIA production. In the present paper, we report the characterization of a polyclonal serum raised against the purified G10H polypeptide. Anti-G10H IgG was able to inhibit the G10H activity and also recognized the G10H polypeptide from C. roseus and other plants producing MIAs. These results establish the usefulness of this antiserum as a biochemical tool. for the study of G10H regulation. © 2004 Elsevier GmbH. All rights reserved MH - Mexico|Yucatan MH - Netherlands PB - JENA: URBAN & FISCHER VERLAG RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0176-1617 UR - ISI:000229076100004 L2 - Catharanthus roseus;cytochrome P450;geraniol 10-hydroxylase;rote in MIA production;hairy roots;monooxygenase;P450 reductase;AVOCADO PERSEA-AMERICANA; INDOLE ALKALOID BIOSYNTHESIS; ROOT-SPECIFIC METABOLISM; PLANT CYTOCHROME-P450; TRYPTOPHAN DECARBOXYLASE; CINNAMATE 4-HYDROXYLASE; TRANSFORMED ROOTS; CELL-CULTURES; PURIFICATION; BIOCHEMISTRY SO - Journal of Plant Physiology 2005 ;162(4):393-402 13347 UI - 3106 AU - Canto J AU - Gonzalez RF AU - Raga AC AU - Dal Pino EMD AU - Lara A AU - Gonzalez-Esparza JA AD - Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, MexicoUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUSP, Inst Astron & Geofis, BR-05508090 Sao Paulo, BrazilUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoGonzalez, RF, Univ Nacl Autonoma Mexico, Inst Astron, Ap 70-264, Mexico City 04510, DF, Mexico TI - The dynamics of velocity fluctuations in the solar wind - I. Coronal mass ejections AB - In this paper we present a simple, analytic model for the dynamical evolution of supersonic velocity fluctuations at the base of the ambient solar wind. These fluctuations result in the formation of dense working surfaces that travel down the wind. It is shown how the initial parameters of the fluctuations (velocity, density and duration) are related to the characteristics of the working surfaces far from the Sun (for instance at the Earth). We apply the model to the evolution of the coronal mass ejections in the IP medium, finding that the model is in good agreement with satellite observations of these phenomena, thus providing physical insight into their dynamical evolution. Our model may contribute to future 'space weather forecasting' on the Earth, based on detailed satellite monitoring of the solar corona MH - Brazil MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0035-8711 UR - ISI:000226853700017 L2 - hydrodynamics;Sun : coronal mass ejections (CMEs);solar wind;FLARE-ASSOCIATED DISTURBANCES; MHD SIMULATION; 2-DIMENSIONAL SIMULATION; MAGNETIC RECONNECTION; INTERPLANETARY MEDIUM; SHOCK-WAVES; DRIVEN; EVOLUTION; RADIO; MODEL SO - Monthly Notices of the Royal Astronomical Society 2005 ;357(2):572-578 13348 UI - 627 AU - Cantone D AU - Zarba CG AD - Univ Catania, Catania, ItalyUniv New Mexico, Mexico City, DF, MexicoCantone, D, Univ Catania, Catania, Italy TI - A tableau-based decision procedure for a fragment of graph theory involving reachability and acyclicity AB - We study the decision problem for the language DGRA (directed graphs with reachability and acyclicity), a quantifier-free fragment of graph theory involving the notions of reachability and acyclicity. We prove that the language DGRA is decidable, and that its decidability problem is NP-complete. We do so by showing that the language enjoys a small model property: If a formula is satisfiable, then it has a model whose cardinality is polynomial in the size of the formula. Moreover, we show how the small model property can be used in order to devise a tableau-based decision procedure for DGRA MH - Italy MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Artificial Intelligence U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000233235000008 L2 - LOGIC SO - Automated Reasoning with Analytic Tableaux and Related Methods 2005 ;3702():93-107 13349 UI - 679 AU - Cantu-Salazar L AU - Hidalgo-Mihart MG AU - Lopez-Gonzalez CA AU - Gonzalez-Romero A AD - Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, EnglandUniv Juarez Autonoma Tabasco, Div Ciencias Biol, Villahermosa 86039, Tabasco, MexicoUniv Autonoma Queretaro, Fac Ciencias Nat, Licenciatura Biol, Queretaro 76010, MexicoInst Ecol, Xalapa 91070, Veracruz, MexicoCantu-Salazar, L, Univ Sheffield, Dept Anim & Plant Sci, Alfred Denny Bldg,Western Bank, Sheffield S10 2TN, S Yorkshire, England TI - Diet and food resource use by the pygmy skunk (Spilogale pygmaea) in the tropical dry forest of Chamela, Mexico AB - The diet and pattern of food resource use by the pygmy skunk Spilogale pygmaea, an endemic and threatened species of western Mexico, was evaluated in the tropical dry forest of Chamela, Jalisco. Analysis of scats (n = 104) and stomach contents (n = 5) obtained during 1997, 1998 and 2000 showed that pygmy skunks fed mainly on invertebrates. Insect larvae constituted the most represented food item in samples. During 2000, food resource use was quantified by comparing occurrence of available prey with occurrence of items found in scats. Even though pygmy skunks seem to be opportunistic foragers, some invertebrates were positively selected, such as insect larvae and Myriapoda, thus suggesting that pygmy skunks may target prey of high nutritional value. The diet varied considerably between consecutive dry and rainy seasons of the studied years, with little overlap in food items. Pygmy skunks may adjust food resource use in response to temporal variations in prey abundance, by incorporating other food items in their diet during the dry season, when food is scarce. Dietary switching between seasons indicates that pygmy skunks may exhibit strategies similar to those of other tropical carnivores to deal with a highly seasonal environment MH - United Kingdom MH - Mexico|Queretaro MH - Mexico|Tabasco MH - Mexico|Veracruz PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 1 U4 - Zoology U5 - J;Article AV - English IS - 0952-8369 UR - ISI:000233183700005 L2 - Spilogale pygmaea;pygmy skunk;tropical dry forest;diet;prey selection;DECIDUOUS FOREST; CONEPATUS-CHINGA; FEEDING ECOLOGY; WESTERN MEXICO; SPOTTED SKUNK; NASUA-NARICA; HOME-RANGE; AVAILABILITY; SELECTION; CARNIVORES SO - Journal of Zoology 2005 ;267():283-289 13350 UI - 1040 AU - Cao QL AU - Zabal C AU - Koenig P AU - Sandhu S AU - Hijazi ZM AD - Univ Chicago, Dept Pediat, Pediat Cardiol Sect, Pritzker Sch Med, Chicago, IL 60637, USAInst Nacl Cardiol Ignacio Chavez, Mexico City, DF, MexicoHijazi, ZM, Univ Chicago, Childrens Hosp, Pediat Cardiol Sect, 5841 S Maryland Ave,MC4051, Chicago, IL 60637 USA TI - Initial clinical experience with intracardiac echocardiography in guiding transcatheter closure of perimembranous ventricular septal defects: Feasibility and comparison with transesophageal echocardiography AB - Over the last several years, intracardiac echocardiography (ICE) has been employed successfully in guiding transcatheter device closure of a secundum atrial septal defect (ASD) or patent foramen ovale (PFO). Nothing is known regarding the use of ICE to guide catheter device closure of a perimembranous ventricular septal defect (PMVSD). Twelve patients (seven female/five male) who had a PMVSD (among them, three patients with associated atrial communications: two with an ASD and one with a PFO) underwent attempts at transcatheter device closure using the Amplatzer membranous VSD device of their defects, using sequential transesophageal echocardiography (TEE) and ICE guidance with general endotracheal anesthesia (five patients) and using ICE alone with conscious sedation (seven patients). The mean age of patients was 16.9 +/- 3.7, and their mean weight was 42.4 +/- 6.6. Their mean left ventricular end-diastolic dimension preclosure was 45.7 +/- 2.5. The Qp/Qs ratio ranged from 1.0 to 1.8:1. During the procedure, the ICE catheter was positioned in the right atrium (RA) in all 12 patients and the ICE catheter was advanced to the left atrium to obtain a view of the ventricular septum in 3. Both TEE and ICE provided similar anatomical views of the position of the PMVSD. Furthermore, the relationship of the defect to the aortic valve and tricuspid valves, the measured size of defect, and the guidance of various stages of device deployment were comparable by TEE and ICE. There were no complications encountered during or after closure. We conclude that ICE provides unique images of the PMVSD and measurements similar to those obtained by TEE. ICE potentially could replace TEE in most patients as a guiding imaging tool for PMVSD device closure, thus eliminating the need for general endotracheal anesthesia. (c) 2005 Wiley-Liss, Inc MH - USA MH - Mexico|Distrito Federal PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 5 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 1522-1946 UR - ISI:000232387600018 L2 - intracardiac echocardiography;perimembranous ventricular septal defect;transcatheter device closure;CATHETER CLOSURE; DEVICE CLOSURE SO - Catheterization and Cardiovascular Interventions 2005 ;66(2):258-267 13351 UI - 2602 AU - Capaccioni B AU - Taran Y AU - Tassi F AU - Vaselli O AU - Mangani G AU - Macias JL AD - Univ Urbino, Inst Volcanol & Geochem, I-60129 Urbino, ItalyUniv Nacl Autonoma Mexico, Inst Geophys, Mexico City 04510, DF, MexicoUniv Florence, Dept Earth Sci, I-50121 Florence, ItalyUniv Florence, CNR, Inst Geosci & Earth Resources, I-50121 Florence, ItalyUniv Urbino, Inst Chem Sci, I-60129 Urbino, ItalyCapaccioni, B, Univ Urbino, Inst Volcanol & Geochem, I-60129 Urbino, Italy TI - Source condition and degradation processes of light hydrocarbons in volcanic gases: an example from El Chichon volcano (Chiapas State, Mexico) (vol 206, pg 81, 2004) MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Geochemistry & Geophysics U5 - J;Correction AV - English IS - 0009-2541 UR - ISI:000228282800010 SO - Chemical Geology 2005 ;216(3-4):353-353 13352 UI - 1056 AU - caraz-Gonzalez V AU - Harmand J AU - Rapaport A AU - Steyer JP AU - Gonzalez-Alvarez V AU - Pelayo-Ortiz Q AD - INRA, LBE, F-11100 Narbonne, FranceINRA Biometrie, F-34060 Montpellier, FranceUniv Guadalajara, Dept Chem Engn, Guadalajara 44430, Jalisco, MexicoAlcaraz-Gonzalez, V, INRA, LBE, Ave Etangs, F-11100 Narbonne, France TI - Robust interval-based regulation for anaerobic digestion processes AB - A robust regulation law is applied to the stabilization of a class of biochemical reactors exhibiting partially known highly nonlinear dynamic behavior. An uncertain environment with the presence of unknown inputs is considered. Based on some structural and operational conditions, this regulation law is shown to exponentially stabilize the aforementioned bioreactors around a desired set-point. This approach is experimentally applied and validated on a pilot-scale (1 M-3) anaerobic digestion process for the treatment of raw industrial wine distillery wastewater where the objective is the regulation of the chemical oxygen demand (COD) by using the dilution rate as the manipulated variable. Despite large disturbances on the input COD and state and parametric uncertainties, this regulation law gave excellent performances leading the output COD towards its set-point and keeping it inside a pre-specified interval MH - France MH - Mexico|Jalisco PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000232146500062 L2 - anaerobic digestion;interval observers;robustness;robust regulation;uncertainty;OBSERVERS; SYSTEMS SO - Water Science and Technology 2005 ;52(1-2):449-456 13353 UI - 2409 AU - caraz-Gonzalez V AU - Salazar-Pena R AU - Gonzalez-Alvarez V AU - Gouze JL AU - Steyer JP AD - Univ Guadalajara, CUCEI, Dept Ingn Quim, Guadalajara 44430, Jalisco, MexicoINRIA, COMORE Project BP93, F-06902 Sophia Antipolis, FranceINRA, Lab Biotechnol Environm, F-11100 Narbonne, FranceAlcaraz-Gonzalez, V, Univ Guadalajara, CUCEI, Dept Ingn Quim, Blvd Marcelino Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - A tunable multivariable nonlinear robust observer for biological systems AB - This paper presents a robust nonlinear asymptotic observer with adjustable convergence rate with a great potential of applicability for biological systems in which the main state variables are difficult and expensive to measure or such measurements do not exist. This observer scheme is based on the classical asymptotic observer, which is modified to allow the tuning of the convergence rate. It is shown that the proposed observer provides fast and satisfactory estimates when facing load disturbances, system failures and parameter uncertainty while maintaining the excellent robustness and stability properties of the classical asymptotic observer. The implementation of the tunable observer is carried out by numerical simulations of a mathematical model of an anaerobic digestion process used for wastewater treatment. The key results are examined and further developed. (c) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved MH - France MH - Mexico|Jalisco PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Biology;Multidisciplinary Sciences U5 - J;Article AV - English IS - 1631-0691 UR - ISI:000228824800003 L2 - turing observers;nonlinear systems;robustness;stability;anaerobic digestion;ANAEROBIC-DIGESTION SO - Comptes Rendus Biologies 2005 ;328(4):317-325 13354 UI - 110 AU - Carbajal N AU - Piney S AU - Rivera JG AD - Inst Potosino Invest Cient & Tecnol, Tangamanga 78231, San Luis Potosi, MexicoInst Natl Sci Appl, Dept Genie Energet & Environm, F-69100 Villeurbanne, FranceCarbajal, N, Inst Potosino Invest Cient & Tecnol, Apdo Postal 3-74, Tangamanga 78231, San Luis Potosi, Mexico TI - A numerical study on the influence of geometry on the formation of sandbanks AB - Applying a two-dimensional, non-linear hydrodynamic numerical model in combination with a semiempirical equation for bedload sediment transport the influence of geometry on the formation of sandbanks is investigated. In the first experiment, the formation of sandbanks in an ideal rectangular basin, resembling the Taylor's problem, was calculated. Sandbanks occur in a small area at the closed boundary. Similar experiments were carried out for a range of wavelengths of the incident Kelvin wave. The results reveal that large wavelengtlis favor the generation of sandbanks. In subsequent calculations, the basin was modified by introducing new geographical features like bays and peninsulas. The numerical experiments show that geometry is a fundamental factor to determine the position where groups of sandbanks appear. The results Suggest that in regions where the Kelvin wave is diffracted, the formation of sandbanks Occurs. An experiment, in which we applied an ideal geometric configuration representing that of the Southern Bight of the North Sea, generated sandbank patterns resembling those observed in the region MH - France MH - Mexico|San Luis Potosi PB - HEIDELBERG: SPRINGER HEIDELBERG RP - NOT IN FILE U3 - TC 0 U4 - Oceanography U5 - J;Article AV - English IS - 1616-7341 UR - ISI:000235392400016 L2 - numerical modeling;tides;sandbanks;Taylor's problem;SHOREFACE-CONNECTED RIDGES; CENTRAL DUTCH COAST; TIDAL SAND BANKS; ORIGIN; SEA SO - Ocean Dynamics 2005 ;55(5-6):559-568 13355 UI - 1238 AU - Cardenas-Camarena L AD - Jalisco Reconstruct Surg Inst, Guadalajara, Jalisco, MexicoCardenas-Camarena, L, Plast Surg Unit, Ave Chapalita 1300 Col Chapalita, Ufa 450001, Russia TI - Aesthetic surgery of the thoracoabdominal area combining abdominoplasty and circumferential lipoplasty: 7 years' experience AB - Background: Aesthetic surgery of the thoracoabdominal area combining abdominoplasty and circumferential lipoplasty during the same surgical procedure is not a very common surgical procedure, but its use has increased during recent years. The authors present their surgical technique combining abdominoplasty and circumferential liposuction to improve body shape, emphasizing how complications can be prevented. Methods: The authors present a 7-year experience combining abdominoplasty and circumferential liposuction. The authors operated on 310 female patients between 26 and 64 years of age (mean, 38 years), weighing between 51 and 113 kg (mean, 76 kg); 86 percent of them were overweight. During the surgical procedure, the authors performed abdominoplasty combined with posterior, lateral, and anterolateral suction-assisted lipoplasty. The abdominoplasty was performed with minimal superior undermining, performing only that necessary to permit muscle plication, preserving maximal blood supply to the distal flap. Results: One thousand five hundred to 8200 ml of fat was obtained with liposuction (mean, 3700 ml) and 380 to 5100 g was eliminated on the abdominal flap (mean, 870 g). Sixty-three patients (20.3 percent) had minor complications and four patients (1.3 percent) had major complications. Conclusions: The combination of abdominoplasty and circumferential liposuction permits excellent body contouring in a single surgical procedure with minimal complications MH - Mexico|Jalisco MH - Russia PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 1 U4 - Surgery U5 - J;Editorial Material AV - English IS - 0032-1052 UR - ISI:000231675500030 L2 - LARGE-VOLUME LIPOSUCTION; TUMESCENT TECHNIQUE; SURGICAL-PROCEDURES; SUCTION LIPECTOMY; COMPLICATIONS; ULTRASOUND; ANESTHESIA; SAFE SO - Plastic and Reconstructive Surgery 2005 ;116(3):881-890 13356 UI - 2111 AU - Cardenas-Lopez JL AU - Haard NF AD - Univ Calif Davis, Dept Food Sci & Technol, Inst Marine Resources, Davis, CA 95616, USACardenas-Lopez, JL, Univ Sonora, Dept Invest & Posgrado Alimentos, POB 1658, Hermosillo, Sonora, Mexico TI - Cysteine proteinase activity in jumbo squid (Dosidicus gigas) hepatopancreas extracts AB - Jumbo squid specimens were captured, dissected, and the hepatopancreas was freeze dried for the extraction of proteolytic enzymes. An autolysis experiment conducted at 25C showed two peaks with maximum proteolysis at pH 3 and 5. The proteinase activity of the extract was measured using azocasein, BANA, Z-PAAFC and Z-AAAFC substrates. Activity of the extract with azocasein (pH 5) had a maximum at 55C and increased threefold with the inclusion of cysteine or DTT. The proteinase activity remained at least at 60% of the original after 45 h at 4C in the pH range of 3-8. Activity was inhibited 70-85% when extracts were treated with cysteine proteinase specific inhibitors. The proteinases extracted from jumbo squid hepatopancreas are mainly of the cysteine type and have significant activity towards a cathepsin L specific substrate. The understanding of proteinases from this tissue could have implications for quality control of jumbo squid food products MH - Mexico|Sonora MH - USA PB - MALDEN: BLACKWELL PUBLISHING INC RP - NOT IN FILE U3 - TC 2 U4 - Biochemistry & Molecular Biology;Food Science & Technology U5 - J;Article AV - English IS - 0145-8884 UR - ISI:000229580900004 L2 - PROTEOLYTIC-ENZYMES; LIVER; PROTEASE; MANTLE; ASSAY SO - Journal of Food Biochemistry 2005 ;29(2):171-186 13357 UI - 49 AU - Cardenas EB AU - Aranda DA AU - Olivares GM AD - IPN, CICATA, Tamaulipas 89600, MexicoCINVESTAV, Unidad Merida, Merida, Yucatan, MexicoHalifax Univ, Halifax, NS, CanadaCardenas, EB, IPN, CICATA, Km 14-5 Carr Tampico,Puerto Ind Altamira, Tamaulipas 89600, Mexico TI - Gonad development and reproductive pattern of the fighting conch Strombus pugilis (Linee, 1758) (Gastropoda, Prosobranchia) from Campeche, Mexico AB - The processes of gonad development through a year are analyzed for Strombus pugilis from Seybaplaya, Campeche. During gametogenesis second order oocytes appear close to the wall of the follicles, with a diameter 90-250 mu m. The cytoplasm is granular, the nucleus is located on the periphery, with a diameter of 15-35 mu m, a nucleolus 7-8 mu m. Spermatozoids have an acrosome of 5-7 mu m. shaped like a coma. In females gametogenesis was registered in two pulses, with 2 peaks of 60%, February to June and September to October. Mature females were found during the 8 months of sampling with peaks during May and August (80%). Spawning was discontinuous, suggesting storage of mature gametes for the right time to spawn. In males gametogenesis was present in a low percentage from March to October, with a maximum of 20%. Maturity was present on just a 10% during July, with constant spawn through the year. Copula has been observed only during egg laying seasons; males seem to keep mature sperms in the prostate gland. Strombus pugilis from the coasts of Campeche presented a fast gonad recovery for males, requiring longer for females. Having missed most of the autumn and early winter months leaves a big gap on the processes of gonad recovery and early gametogenesis. Apparently there is no correlation between salinity, temperature and the reproductive cycle, but this population has the potential for reproducing through the year MH - Canada MH - Mexico|Tamaulipas MH - Mexico|Yucatan PB - GROTON: NATL SHELLFISHERIES ASSOC RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0730-8000 UR - ISI:000237299200030 L2 - Strombus pugilis;reproduction;gonad;conch;GENUS STROMBUS; ANATOMY; BIOLOGY SO - Journal of Shellfish Research 2005 ;24(4):1127-1133 13358 UI - 2127 AU - Cardenas L AU - Lovy-Wheeler A AU - Wilsen KL AU - Hepler PK AD - Univ Massachusetts, Morrill Sci Ctr, Dept Biol, Amherst, MA 01003, USAUniv Massachusetts, Morrill Sci Ctr, Plant Biol Grad Program, Amherst, MA 01003, USACardenas, L, UNAM, Inst Biotecnol, Dept Biol Mol Plantas, Apartado Postal 510-3, Cuernavaca 62271, Morelos, Mexico TI - Actin polymerization promotes the reversal of streaming in the apex of pollen tubes AB - Actin polymerization is important in the control of pollen tube growth. Thus, treatment of pollen tubes with low concentrations of latrunculin B (Lat-B), which inhibits actin polymerization, permits streaming but reversibly blocks oscillatory growth. In the current study, we employ Jasplakinolide (Jas), a sponge cyclodepsi-peptide that stabilizes actin microfilaments and promotes polymerization. Uniquely, Jas (2 mu M) blocks streaming in the shank of the tube, but induces the formation of a toroidal-shaped domain in the swollen apex, of which longitudinal optical sections exhibit circles of motion. The polarity of this rotary motion is identical to that of reverse fountain motility in control pollen tubes, with the forward direction occurring at the edge of the cell and the rearward direction in the cell interior. Support for the idea that actin polymerization in the apical domain contributes to the formation of this rotary motility activity derives from the appearance therein of aggregates and flared cables of F-actin, using immunofluorescence, and by the reduction in G-actin as indicated with fluorescent DNAse. In addition, Jas reduces the tip-focused Ca2+ gradient. However, the alkaline band appears in the swollen apex and is spatially localized with the reverse fountain streaming activity. Taken together, our results support the idea that actin polymerization promotes reversal of streaming in the apex of the lily pollen tube. Cell Motil. Cytoskeleton 61:112-127, 2005. (c) 2005 Wiley-Liss, Inc MH - Mexico|Morelos MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 14 U4 - Cell Biology U5 - J;Article AV - English IS - 0886-1544 UR - ISI:000229454000005 L2 - pollen tube;reverse fountain streaming;actin cytoskeleton;actin polymerization;jasplakinolide;chondramide;pH;DEPOLYMERIZING FACTOR; LILIUM-LONGIFLORUM; PLANT-CELLS; F-ACTIN; TIP GROWTH; FILAMENT POLYMERIZATION; MEMBRANE TRAFFICKING; DEOXYRIBONUCLEASE-I; SIGNAL-TRANSDUCTION; DYNAMIC ACTIN SO - Cell Motility and the Cytoskeleton 2005 ;61(2):112-127 13359 UI - 710 AU - Cardenas RG AU - Sanchez EM AD - ITESM CEM, Mexico City 52926, DF, MexicoUniv Paris 08, LRIA, EPHE, F-75005 Paris, FranceCardenas, RG, ITESM CEM, Mexico City 52926, DF, Mexico TI - Security challenges of distributed e-learning systems AB - Security considerations play an increasingly important role for distributed computing. In today's Internet age, academia requires sharing, distributing, merging, changing information, linking applications and other resources within and among universities and other related organizations. Because e-learning systems are open, distributed and interconnected, then security becomes an important challenge in order to insure that interested actors only have access to the right information at the appropriate time. The purpose of this paper is to give an in-depth understanding of most important security challenges that can be relevant for distributed e-learning systems MH - France MH - Mexico|Distrito Federal PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000232951100049 SO - Advanced Distributed Systems 2005 ;3563():538-544 13360 UI - 3090 AU - Cardol P AU - Gonzalez-Halphen D AU - Reyes-Prieto A AU - Baurain D AU - Matagne RF AU - Remacle C AD - Univ Liege, Inst Plant Biol B22, B-4000 Cointe Ougree, BelgiumNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoNatl Autonomous Univ Mexico, Inst Fisiol Celular, Dept Genet, Mexico City 04510, DF, MexicoRemacle, C, Univ Liege, Inst Plant Biol B22, B-4000 Cointe Ougree, Belgium TI - The mitochondrial oxidative phosphorylation proteome of Chlamydomonas reinhardtii deduced from the genome sequencing project MH - Belgium MH - Mexico|Distrito Federal PB - ROCKVILLE: AMER SOC PLANT BIOLOGISTS RP - NOT IN FILE U3 - TC 8 U4 - Plant Sciences U5 - J;Review AV - English IS - 0032-0889 UR - ISI:000227116900005 L2 - CYTOCHROME-C-OXIDASE; YEAST NUCLEAR GENE; BOVINE HEART-MITOCHONDRIA; IRON-SULFUR PROTEIN; OXIDOREDUCTASE COMPLEX I; SACCHAROMYCES-CEREVISIAE; ATP SYNTHASE; PLANT-MITOCHONDRIA; BC(1) COMPLEX; MESSENGER-RNA SO - Plant Physiology 2005 ;137(2):447-459 13361 UI - 818 AU - Carey JR AU - Liedo P AU - Muller HG AU - Wang JL AU - Senturk D AU - Harshman L AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAUniv Calif Berkeley, Ctr Ecol & Demog Aging, Berkeley, CA 94720, USAEl Colegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Calif Davis, Dept Stat, Davis, CA 95616, USAPenn State Univ, Dept Stat, University Pk, PA 16802, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USACarey, JR, Univ Calif Davis, Dept Entomol, 1 Shields Ave, Davis, CA 95616 USA TI - Biodemography of a long-lived tephritid: Reproduction and longevity in a large cohort of female Mexican fruit flies, Anastrepha ludens AB - Age of sexual maturity, daily and lifetime reproductive rates, and life span were recorded in a laboratory cohort of Mexican fruit flies consisting of over 1100 females maintained individually. The results revealed that, relative to the medfly, the Mexfly is slower maturing (14 vs 17 days), more fecund (1400 vs 650-1100 eggs/female), and longer lived (50 vs 35 clays). The results reinforced the generality of several earlier findings on the medfly including the deceleration of mortality at older ages and the weakness of the correlation between the rate of egg laying at early ages and both subsequent reproduction and remaining longevity. Discussion includes perspectives on the role of artificial selection in shaping the demographic traits of the mass-reared strain of Mexfly used in this study, as well as the overall significance of large scale biodemographic studies in understanding aging and longevity. (c) 2005 Elsevier Inc, All rights reserved MH - USA MH - Mexico|Chiapas PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Geriatrics & Gerontology U5 - J;Article AV - English IS - 0531-5565 UR - ISI:000232915800005 L2 - biodemographic studies;mexfly;medfly;DROSOPHILA-MELANOGASTER; LIFE-HISTORY; DEMOGRAPHIC-PROFILES; FLY FEMALES; AGE; MORTALITY; EVOLUTION; SENESCENCE; SELECTION; PATTERNS SO - Experimental Gerontology 2005 ;40(10):793-800 13362 UI - 3327 AU - Carey JR AU - Liedo P AU - Muller HG AU - Wang JL AU - Zhang Y AU - Harshman L AD - Univ Calif Davis, Dept Entomol, Davis, CA 95616, USAUniv Calif Berkeley, Ctr Econ & Demog Aging, Berkeley, CA 94720, USAColegio Frontera Sur, Tapachula 30700, Chiapas, MexicoUniv Calif Davis, Dept Stat, Davis, CA 95616, USAUniv Nebraska, Sch Biol Sci, Lincoln, NE 68588, USACarey, JR, Univ Calif Davis, Dept Entomol, 1 Shields Ave, Davis, CA 95616 USA TI - Stochastic dietary restriction using a Markov-chain feeding protocol elicits complex, life history response in medflies AB - Lifespan in individually housed medflies (virgins of both sexes) and daily reproduction for females were studied following one of 12 dietary restriction (DR) treatments in which the availability of high-quality food (yeast-sugar mixture) for each fly was based on a Markov chain feeding scheme - a stochastic dietary regime which specifies that the future dietary state depends only on the present dietary state and not on the path by which the present state was achieved. The stochastic treatments consisted of a combination of one of four values of a 'discovery' parameter and one of three values of a 'persistence' parameter. The results supported the hypotheses that: (i) longevity is extended in most medfly cohorts subject to stochastic DR; and (ii) longevity is more affected by the patch discovery than the patch persistence parameter. One of the main conclusions of the study is that, in combination with the results of earlier dietary restriction studies on the medfly, the results reinforce the concept that the details of the dietary restriction protocols have a profound impact on the sign and magnitude of the longevity extension relative to ad libitum cohorts and that a deeper understanding of the effect of food restriction on longevity is not possible without an understanding of its effect on reproduction MH - USA MH - Mexico|Chiapas PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Cell Biology;Geriatrics & Gerontology U5 - J;Article AV - English IS - 1474-9718 UR - ISI:000226581300004 L2 - ad libitum feeding;birth and death rates;lifespan;life tables;longevity;mortality response;reproduction;sex differentials;Tephritidae;unpredictable environments;MEDITERRANEAN FRUIT-FLY; AGE-SPECIFIC MORTALITY; DROSOPHILA-MELANOGASTER; CALORIE RESTRICTION; FOOD RESTRICTION; ADULT LONGEVITY; FLIES DIPTERA; REPRODUCTION; TEPHRITIDAE; EVOLUTIONARY SO - Aging Cell 2005 ;4(1):31-39 13363 UI - 2659 AU - Carigi L AU - Peimbert M AU - Esteban C AU - Garcia-Rojas J AD - Natl Autonomous Univ Mexico, Inst Astron, Mexico City 04510, DF, MexicoInst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, SpainCarigi, L, Natl Autonomous Univ Mexico, Inst Astron, Apartado Postal 70264, Mexico City 04510, DF, Mexico TI - Carbon, nitrogen, and oxygen galactic gradients: A solution to the carbon enrichment problem AB - Eleven models of Galactic chemical evolution, differing in the carbon, nitrogen, and oxygen yields adopted, have been computed to reproduce the Galactic O/H values obtained from H II regions. All the models fit the oxygen gradient, but only two models also fit the carbon gradient, those based on carbon yields that increase with metallicity owing to stellar winds in massive stars (MSs) and decrease with metallicity owing to stellar winds in low- and intermediate- mass stars (LIMSs). The successful models also fit the C/O versus O/H evolution history of the solar vicinity obtained from stellar observations. We also compare the present-day N/H gradient and the N/O versus O/H and the C/Fe, N/Fe, O/Fe versus Fe/H evolution histories of the solar vicinity predicted by our two best models with those derived from H II regions and from stellar observations. While our two best models fit the C/H and O/H gradients, as well as the C/O versus O/H history, only model 1 fits well the N/H gradient and the N/O values for metal-poor stars but fails to fit the N/H values for metal-rich stars. Therefore, we conclude that our two best models solve the C enrichment problem but that further work needs to be done on the N enrichment problem. By adding the C and O production since the Sun was formed predicted by models 1 and 2 to the observed solar values, we find an excellent agreement with the O/H and C/H values of the solar vicinity derived from H II region O and C recombination lines. Our results are based on an initial mass function ( IMF) steeper than Salpeter's; a Salpeter-like IMF predicts C/H, N/H, and O/H ratios higher than observed. One of the most important results of this paper is that the fraction of carbon due to MSs and LIMSs in the interstellar medium is strongly dependent on time and on the galactocentric distance; at present about half of the carbon in the interstellar medium of the solar vicinity has been produced by MSs and half by LIMSs MH - Mexico|Distrito Federal MH - Spain PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 17 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000228197700020 L2 - Galaxy : abundances;Galaxy : evolution;ISM : abundances;stars : mass loss;TELESCOPE ECHELLE SPECTROPHOTOMETRY; STELLAR YIELDS; CHEMICAL-COMPOSITION; ABUNDANCE GRADIENTS; EXTRASOLAR PLANETS; MASSIVE STARS; PARENT STARS; HII-REGIONS; MILKY-WAY; EVOLUTION SO - Astrophysical Journal 2005 ;623(1):213-224 13364 UI - 1287 AU - Carino C AU - Yoo H AU - Rueda BR AU - Gonzalez RR AD - Boston Biomed Res Inst, Watertown, MA, USAMassachusetts Gen Hosp, Vincent Ctr Reprod Biol, Boston, MA 02114, USAHarvard Univ, Sch Med, Boston, MA 02115, USAInst Nacl Ciencias Med & Nutr, Mexico City, DF, Mexico TI - Functional role of leptin signaling pathways in human endometrial epithelial cells MH - Mexico|Distrito Federal MH - USA PB - LONDON: W B SAUNDERS CO LTD RP - NOT IN FILE U3 - TC 0 U4 - Developmental Biology;Obstetrics & Gynecology;Reproductive Biology U5 - J;Meeting Abstract AV - English IS - 0143-4004 UR - ISI:000231496500217 SO - Placenta 2005 ;26(8-9):A57-A57 13365 UI - 1336 AU - Carmona E AU - Paneque M AU - Santos LL AU - Salazar V AD - Univ Sevilla, CSIC, Dept Quim Inorgan, Inst Invest Quim, Seville 41092, SpainUniv Autonoma Estado Hidalgo, CIQ, Pachuca, Hidalgo, MexicoCarmona, E, Univ Sevilla, CSIC, Dept Quim Inorgan, Inst Invest Quim, Avda Amer Vespucio S-N, Seville 41092, Spain TI - Iridium carboxycarbene complexes by C-H bond activation of aliphatic ethers and of alkyl aryl ethers AB - The double C-H bond activation of ethers that have an alkyl terminus, RCH2OR' (R'= alkyl, aryl), is a useful route to heteroatom-stabilized iridium carbenes, Ir = C(R)OR'. An overview of our recent work in this field, using Ir(III) fragments stabilized by hydrotris(pyrazolyl)borate ligands, is presented concentrating on some aliphatic, non-cyclic ethers and on anisole, the latter taken as a representative example of alkyl aryl ethers. (c) 2004 Elsevier B.V. All rights reserved MH - Mexico|Hidalgo MH - Spain PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 10 U4 - Chemistry, Inorganic & Nuclear U5 - J;Article AV - English IS - 0010-8545 UR - ISI:000231534300004 L2 - iridium;carbenes;C-H activation;hydrotris(pyrazolyl)borate;coordination chemistry;CYCLIC ETHERS; CARBENE COMPLEXES; GENERATION; DEHYDROGENATION; ELIMINATION; CENTERS; CARBON SO - Coordination Chemistry Reviews 2005 ;249(17-18):1729-1735 13366 UI - 3093 AU - Carmona ER AU - Arencibia AD AU - Lopez J AU - Simpson J AU - Vargas D AU - Sala F AD - Natl Inst Sugarcane Res, INICA, Dept Genet, Havana 19390, CubaGenet Engn & Biotechnol Ctr, Plant Div, Havana 10600, CubaCINVESTAV, Genet Engn Dept, Guanajuato, MexicoUniv Milan, Dept Biol, I-20133 Milan, ItalyNatl Inst Agr Sci, INCA, Havana 32700, CubaArencibia, AD, Natl Inst Sugarcane Res, INICA, Dept Genet, Edificio IPROYAZ Carretera CUJAE Km 2 1-2,Boyeros, Havana 19390, Cuba TI - Analysis of genomic variability in transgenic sugarcane plants produced by Agrobacterium tumefaciens infection AB - Three transgenic sugarcane populations produced by Agrobacterium tumefaciens infection were analysed for the presence of genomic variability. Plants of the original cultivar, plants regenerated without transformation, as well as transformed and untransformed calli were used as control treatments. Amplified fragment length polymorphism (AFLP) of DNA extracted from leaves or calli assessed genomic profiling. The average DNA polymorphism within each population was determined by calculating the polymorphism index, while the extent of genomic dissimilarity among individual plants within transgenic populations was verified in unweighted pair group method using arithmetic averages dendrograms. The results showed that the production of transgenic sugarcane plants by A. tumefaciens infection is accompanied by limited but detectable genomic changes and that, on average, these occur at the same rate in plant populations carrying different transgenes. Main factors contributing to somaclonal variation in transgenic sugarcane plants have been verified by pre-existing DNA polymorphism into the donor genotype and in vitro culture steps during the transformation procedure. The relevant practical conclusion from this finding is that the AFLP analysis may be effectively used to identify individual transgenic plants with the least genomic deviation from the parental ones. The selected genotype would be conserved as cultivated sugarcane is asexually propagated MH - Cuba MH - Italy MH - Mexico|Guanajuato PB - BERLIN: BLACKWELL VERLAG GMBH RP - NOT IN FILE U3 - TC 2 U4 - Agronomy;Biotechnology & Applied Microbiology;Plant Sciences U5 - J;Article AV - English IS - 0179-9541 UR - ISI:000226967100007 L2 - Saccharum spp;Agrobacterium tumefaciens;amplified fragment length polymorphism;genomic changes;transgenic sugarcane;SOMACLONAL VARIATION; MEDIATED TRANSFORMATION; CELL ELECTROPORATION; L. PLANTS; SACCHARUM; HYBRID; GENE; EVOLUTION; TOXIN; AFLP SO - Plant Breeding 2005 ;124(1):33-38 13367 UI - 2831 AU - Carney BW AU - Aguilar LA AU - Latham DW AU - Laird JB AD - Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599, USAObserv Astron Nacl, Ensenada 22800, Baja California, MexicoCtr Astrophys, Cambridge, MA 02138, USABowling Green State Univ, Dept Phys & Astron, Bowling Green, OH 43403, USACarney, BW, Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA TI - A survey of proper-motion stars. XVII. A deficiency of binary stars on retrograde Galactic orbits and the possibility that omega Centauri is related to the effect AB - We compare the frequency of field binary stars as a function of Galactic velocity vectors and find a deficiency of such stars on strongly retrograde orbits. Metal-poor stars moving on prograde Galactic orbits have a binary frequency of 28% +/- 3%, whereas the retrograde stars' binary frequency is only 10% +/- 2% for V <= 300 km s(-1). No such binary deficiencies are seen for the U or W velocities, nor for [Fe/H] . Some mechanism exists that either disrupts binary systems or preferentially adds single stars moving primarily on retrograde orbits. Theoretical analyses and critical evaluations of our observational data appear to rule out preferential disruption of preexisting binary stars due to such causes as tidal interactions with massive gravitational perturbers, including giant molecular clouds, black holes, or the Galactic center. Dynamically evolved stellar ensembles, such as globular clusters, provide a possible source of single stars. Three lines of evidence rule out this explanation. First, there is no mechanism to significantly enhance dissolution of clusters moving on retrograde orbits. Second, a study of globular clusters moving on prograde and retrograde orbits and with perigalacticon distances such that they are unlikely to be affected strongly by central tidal effects shows that clusters moving on prograde Galactic orbits may be more evolved dynamically than clusters moving on retrograde orbits. Finally, we have undertaken a comprehensive search for star streams that might be discernible. Monte Carlo modeling suggests that our sample may include one moving group, but it contains only five stars. Although the Galactic orbit of this group passes near the Galactic center, it is not moving on a retrograde Galactic orbit and falls short by a factor of at least 20 in supplying the necessary number of single stars. There is one intriguing possibility to explain our results. A dissolved dwarf galaxy may have too large a velocity spread to be easily detected in our sample using our technique. However, dwarf galaxies appear to often show element-to-iron versus [Fe/H] abundance patterns that are not similar to the bulk of the stellar field and cluster halo stars. We explore the s-process elements Y and Ba. Eight stars in our sample have such elemental abundances already measured and also lie in the critical domain with -1.6 <= [Fe/H] <= -1.0 and V <= 300 km s(-1). The admittedly small samples appears to show a bimodal distribution in [Y/Fe], [Ba/Fe], and [alpha/Fe], where "alpha'' represents an average abundance of Mg, Si, Ca, and Ti. This behavior is reminiscent of the difference in the abundances found between the globular cluster omega Centauri and other globular clusters. It is also intriguing that the stars most similar to omega Cen in their chemical abundances show a relatively coherent set of kinematic properties, with a modest velocity dispersion. The stars less like omega Cen define a dynamically hot population. The binary frequency of the stars in omega Cen does not appear to be enhanced, but detailed modeling of the radial velocity data remains to be done MH - Mexico|Baja California MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 2 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-6256 UR - ISI:000227741700010 L2 - binaries : general;Galaxy : evolution;Galaxy : kinematics and dynamics;HALO METALLICITY DISTRIBUTION; LINED SPECTROSCOPIC BINARIES; GLOBULAR-CLUSTER SYSTEMS; HIGH-VELOCITY STARS; STELLAR GROUPS; RADIAL-VELOCITIES; SOLAR NEIGHBORHOOD; MASS FUNCTION; RESOLUTION SPECTRA; CHEMICAL EVOLUTION SO - Astronomical Journal 2005 ;129(4):1886-1905 13368 UI - 2346 AU - Carranza-Rosales P AU - Said-Fernandez S AU - Sepulveda-Saavedra J AU - Cruz-Vega DE AU - Gandolfi AJ AD - Ctr Invest Biomed Noreste, Div Biol Celular & Mol, IMSS, Monterrey 64720, Nuevo Leon, MexicoUniv Autonoma Nuevo Loen, Fac Med, Dept Histol, Monterrey 64460, Nuevo Leon, MexicoUniv Arizona, Dept Pharmacol & Toxicol, Tucson, AZ 85721, USACarranza-Rosales, P, Ctr Invest Biomed Noreste, Div Biol Celular & Mol, IMSS, Adm Correos 4,Apartado Postal 020,Colonia Indepen, Monterrey 64720, Nuevo Leon, Mexico TI - Morphologic and functional alterations induced by low doses of mercuric chloride in the kidney OK cell line: ultrastructural evidence for an apoptotic mechanism of damage AB - Mercury produces acute renal failure in experimental animal models, but the mechanism of tubular injury has not completely been clarified. There is an increased interest in the role of apoptosis in the pathogenesis of renal diseases that result primarily from injury to renal tubular epithelial cells. However, detailed studies of morpho-functional alterations induced by mercuric chloride in kidney cell lines are scarce. This work characterizes these alterations in OK cell cultures. Morphological alterations were profiled using light microscopy, transmission electron microscopy, and confocal microscopy, as well as mitochondrial functional assays in the cells exposed to low concentrations of HgCl,. At concentrations of 1 and 10 muM of HgCl, there were no morphological or ultrastructural alterations, but the mitochondrial function (MTT assay) and intracellular ATP content was increased, especially at longer incubation times (6 and 9 h). At 15 muM HgCl2, both the mitochondrial activity and the endogenous ATP decreased significantly. At this concentration the OK cells rounded up, had increased number of cytoplasmic vacuoles, and detached from the cell monolayer. At 15 muM HgCl2 ultrastructural changes were characterized by dispersion of the ribosomes, dilatation of the cisterns of the rough endoplasmic reticulum, increase of number of cytoplasmic vacuoles, chromatin condensation, invaginations of the nuclear envelope, presence of cytoplasmic inclusion bodies, and alterations in the size and morphology of mitochondria. At 15 muM HgCl2 apoptotic signs included membrane blebbing, chromatin condensation, mitochondrial alterations, apoptotic bodies, and nuclear envelope rupture. Using confocal microscopy and the mitochondrial specific dye MitoTracker Red, it was possible to establish qualitative changes induced by mercury on the mitochondrial membrane potential after incubation of the cells for 6 and 9 h with 15 muM HgCl2. This effect was not observed at short times (1 and 3 h) with this same concentration, neither with 1 and 10 muM HgCl2 in all the studied times. Taken together, these findings indicate that low concentrations of HgCl2 induce apoptosis by inhibiting mitochondrial function, and the OK cell line may be considered a useful tool for the study of programmed cell death involving mercurial species and other heavy metals. (c) 2005 Elsevier Ireland Ltd. All rights reserved MH - Mexico|Nuevo Leon MH - USA PB - CLARE: ELSEVIER IRELAND LTD RP - NOT IN FILE U3 - TC 7 U4 - Pharmacology & Pharmacy;Toxicology U5 - J;Article AV - English IS - 0300-483X UR - ISI:000228873200002 L2 - mercuric chloride;apoptosis;ultrastructure;nephrotoxicity;OK cells;ACTIVATED PROTEIN-KINASE; RENAL TUBULAR DAMAGE; EPITHELIAL-CELLS; TOXICITY; LLC-PK1; DEATH; DYSFUNCTION; NECROSIS; CADMIUM; PATHWAY SO - Toxicology 2005 ;210(2-3):111-121 13369 UI - 552 AU - Carrasco-Nunez G AU - Branney MJ AD - UNAM, Ctr Geociencias, Queretaro 76001, MexicoUniv Leicester, Dept Geol, Leicester LE1 7RH, Leics, EnglandCarrasco-Nunez, G, UNAM, Ctr Geociencias, Campus Juriquilla,Apdo Postal 1-742, Queretaro 76001, Mexico TI - Progressive assembly of a massive layer of ignimbrite with a normal-to-reverse compositional zoning: the Zaragoza ignimbrite of central Mexico AB - The Zaragoza ignimbrite and two enclosing rhyodacite pumice fall layers were emplaced during the 15 km(3) (DRE), similar to 0.1 Ma Zaragoza eruption from Los Humeros volcanic centre, 180 km east of Mexico City. The ignimbrite comprises several massive flow-units, the largest of which locally exceeds 20 m in thickness and is regionally traceable. It comprises massive lapilli-ash with vertical elutriation pipes, and has a fine-grained inverse-graded base and a pumice concentration zone at the top. It also exhibits an unusual gradational 'double' vertical compositional zonation that is widely traceable. A basal rhyodacitic (67.6-69 wt% SiO2) zone grades up via a mixed zone into a central andesitic (58-62 wt% SiO2) zone, which, in turn, grades up into an upper rhyodacitic (67.6-69 wt% SiO2) zone. Zoning is also defined by vertical variations in lithic clast populations. We infer that pyroclastic fountaining fed initially rhyodacite pumice clasts to a sustained granular fluid-based pyroclastic density current. The composition of the pumice clasts supplied to the current then gradually changed, first to andesite and then back to rhyodacite. Inverse grading at the base of the massive layer may reflect initial waxing flow competence. The pumice concentration at the top of the massive layer is entirely rhyodacitic and was probably deposited during waning stages of the current, when the supply of andesitic pumice clasts had ceased. The return to rhyodacitic composition may have been the result of eruption-conduit modification during collapse of Los Potreros caldera, marked in the ignimbrite by a widespread influx of hydrothermally altered lithic blocks, and/or a decrease in draw-up depth from a compositionally stratified magma chamber as the eruptive mass flux waned. The massive layer of ignimbrite thins locally to less than 2 m, yet it still shows the double zonation. Correlation of the zoning suggests that the thin massive layer is stratigraphically condensed, and aggraded relatively slowly during the same time interval as did the much thicker (<= 50 m) massive layer MH - United Kingdom MH - Mexico|Queretaro PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0258-8900 UR - ISI:000233499500001 L2 - ignimbrite;massive beds;compositional zoning;explosive eruption;Los Humeros;pumice;grading;density current;GRAN-CANARIA; PYROCLASTIC FLOWS; DENSITY CURRENTS; LOS-HUMEROS; BISHOP TUFF; MAGMA; EMPLACEMENT; DEPOSITION; ERUPTION; TRANSPORT SO - Bulletin of Volcanology 2005 ;68(1):3-20 13370 UI - 824 AU - Carrasco-Nunez G AU - Righter K AU - Chesley J AU - Siebert L AU - randa-Gomez J AD - Ctr Geociencias, Queretaro 76230, MexicoNASA, Lyndon B Johnson Space Ctr, Houston, TX 77058, USAUniv Arizona, Dept Geosci, Tucson, AZ 85721, USASmithsonian Inst, Global Volcanism Program, Washington, DC 20013, USACarrasco-Nunez, G, Ctr Geociencias, Campus UNAM Juriquilla, Queretaro 76230, Mexico TI - Contemporaneous eruption of calc-alkaline and alkaline lavas in a continental arc (Eastern Mexican Volcanic Belt): chemically heterogeneous but isotopically homogeneous source AB - Nearly contemporaneous eruption of alkaline and calc-alkaline lavas occurred about 900 years BP from El Volcancillo paired vent, located behind the volcanic front in the Mexican Volcanic Belt (MVB). Emission of hawaiite (Toxtlacuaya) was immediately followed by calc-alkaline basalt (Rio Naolinco). Hawaiites contain olivine microphenocrysts (Fo(67-72)), plagioclase (An(56-60)) phenocrysts, have 4-5 wt% MgO and 49.6-50.9 wt% SiO2. In contrast, calc-alkaline lavas contain plagioclase (An(64-72)) and olivine phenocrysts (Fo(81-84)) with spinel inclusions, and have 8-9 wt% MgO and 48.4-49.4 wt% SiO2. The most primitive lavas in the region (Rio Naolinco and Cerro Colorado) are not as primitive as parental melts in other arcs, and could represent either (a) variable degrees of melting of a subduction modified, garnet-bearing depleted mantle source, followed by AFC process, or (b) melting of two distinct mantle sources followed by AFC processes. These two hypotheses are evaluated using REE, HFSE, and Sr, Os and Pb isotopic data. The Toxtlacuaya flow and the Y & I lavas can be generated by combined fractional crystallization and assimilation of gabbroic granulite, starting with a parental liquid similar to the Cerro Colorado basalt. Although calc-alkaline and alkaline magmas commonly occur together in other areas of the MVB, evidence for subduction component in El Volcancillo magmas is minimal and limited to < 1%, which is a unique feature in this region further from the trench. El Volcancillo lavas were produced from two different magma batches: we surmise that the injection of calc-alkaline magma into an alkaline magma chamber triggered the eruption of hawaiites. Our results suggest that the subalkaline and hawaiitic lavas were formed by different degrees of partial melting of a similar, largely depleted mantle source, followed by later AFC processes. This model is unusual for arcs, where such diversity is usually explained by melting of heterogeneous (enriched and depleted) and subduction-modified mantle MH - Mexico|Queretaro MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics;Mineralogy U5 - J;Article AV - English IS - 0010-7999 UR - ISI:000232793000004 L2 - Mexican Volcanic Belt;assimilation and fractional crystallization;hawaiite;calc-alkaline lavas;degree of melting;mantle source;SUBDUCTION ZONE MAGMATISM; TRACE-ELEMENT; BASALTIC ANDESITES; WESTERN MEXICO; PB-ISOTOPE; COMPOSITIONAL DIVERSITY; QUATERNARY VOLCANISM; MANTLE METASOMATISM; WASHINGTON CASCADES; SOUTHERN WASHINGTON SO - Contributions to Mineralogy and Petrology 2005 ;150(4):423-440 13371 UI - 915 AU - Carrea G AU - Colonna S AU - Kelly DR AU - Lazcano A AU - Ottolina G AU - Roberts SM AD - Fac Farm, Ist Chim Organ Alessandro Marchesini, I-20133 Milan, ItalyCNR, Ist Chim Riconoscimento Mol, I-20131 Milan, ItalyUniv Cardiff Wales, Sch Chem, Cardiff CF10 2AT, WalesNatl Autonomous Univ Mexico, Fac Ciencias, Mexico City 04510, DF, MexicoUniv Manchester, Sch Chem, Manchester M60 1QD, Lancs, EnglandColonna, S, Fac Farm, Ist Chim Organ Alessandro Marchesini, Via Venezian 21, I-20133 Milan, Italy TI - Polyamino acids as synthetic enzymes: mechanism, applications and relevance to prebiotic catalysis AB - Polyamino acids, such as polyleucine, behave as synthetic enzymes in the asymmetric epoxidation of chalcone and other electron-deficient alkenes (the Julia-Colonna reaction). The influences of reaction conditions, of the molecular structure of the catalysts and of the scaling-up of the process on the enantioselectivity of the reaction have been determined. The kinetics and mechanism have been investigated using a soluble PEG-polyleucine conjugate, which behaves in a similar way to an enzyme, showing saturation kinetics for both chalcone and HOO-. Enantioselective catalysis is achieved with peptides with as few as five residues and scalemic catalysts show high chiral amplification. Here, we discuss the relevance of these-enzyme like catalysts to prebiotic processes, such as the role of small peptides in the formation of optically active cyanohydrins MH - United Kingdom MH - Italy MH - Mexico|Distrito Federal PB - LONDON: ELSEVIER SCIENCE LONDON RP - NOT IN FILE U3 - TC 8 U4 - Biotechnology & Applied Microbiology U5 - J;Review AV - English IS - 0167-7799 UR - ISI:000232605900006 L2 - COLONNA ASYMMETRIC EPOXIDATION; POLY-L-LEUCINE; AMINO-ACIDS; STEREOSELECTIVE EPOXIDATION; CHALCONE; PEPTIDE; OXIDATION; KETONES; ORIGIN; SILICA SO - Trends in Biotechnology 2005 ;23(10):507-513 13372 UI - 1424 AU - Carreon-Torres E AU - Juarez-Meavepena M AU - Cardoso-Saldana G AU - Gomez CH AU - Franco M AU - Fievet C AU - Luc G AU - Juarez-Oropeza MA AU - Perez-Mendez O AD - Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Sect 16, Mexico City 14080, DF, MexicoInst Nacl Cardiol Ignacio Chavez, Dept Endocrinol, Mexico City 14080, DF, MexicoUNAM, Dept Biochem, Sch Med, Mexico City, DF, MexicoInst Pasteur, INSERM, U525, F-59019 Lille, FrancePerez-Mendez, O, Inst Nacl Cardiol Ignacio Chavez, Dept Physiol, Sect 16, Juan Badiano 1, Mexico City 14080, DF, Mexico TI - Pioglitazone increases the fractional catabolic and production rates of high-density lipoproteins apo AI in the New Zealand White rabbit AB - Pioglitazone is an agonist of the peroxisorne proliferator-activated receptor gamma (PPAR gamma) that raises HDL-cholesterol plasma in humans. Whether pioglitazone-mediated modifications in HDL-apolipoprotein AI (apo At) turnover in vivo contribute to this effect has not been completely elucidated. Therefore, we performed kinetic studies of HDL-apo AI radiolabeled with I-125 in male New Zealand White rabbits after 6 weeks of 0.6 (n = 8), 1.75 (it = 8), and 2.6 mg/kg/day (n = 7) pioglitazone and vehicle (n = 12) treatment. Fractional catabolic rate (FCR) of HDL-apo AI was significantly higher in 1.75 and 2.6 m/kg pioglitazone-treated animals, as compared with control rabbits (0.057 +/- 0.014 and 0.049 +/- 0.01 versus 0.025 +/- 0.005 pools/h, respectively); these changes were associated to a similar increase in apo Al production rates (PR) (1.24 +/- 0.62 and 1.14 +/- 0.40 versus 0.53 +/- 0.17 mg/kg/h, p < 0.01). Consequently, apo Al plasma levels in pioglitazone-treated animals were similar to those of controls. The apo AI-FRC and -PR correlated with the relative proportion of the HDL3c subclass, as determined by polyacrylamide gadient electrophoresis. Our data demonstrate that pioglitazone markedly modifies apo Al kinetics and enhances the proportion of small HDL3c particles, despite the unchanged apo Al concentration. Whether or not the pioglitazone-induced structural changes of HDL contribute to the anti-atherosclerotic effects of the drug remains to be determined. (c) 2005 Elsevier Ireland Ltd. All rights reserved MH - France MH - Mexico|Distrito Federal PB - CLARE: ELSEVIER IRELAND LTD RP - NOT IN FILE U3 - TC 5 U4 - Peripheral Vascular Disease U5 - J;Article AV - English IS - 0021-9150 UR - ISI:000231331100003 L2 - high-density lipoproteins;apo AI kinetics;thiazolidinediones;pioglitazone;HDL remodeling;REVERSE CHOLESTEROL TRANSPORT; TYPE-2 DIABETES-MELLITUS; ACTIVATED RECEPTOR-GAMMA; IN-VIVO EVIDENCE; GLYCEMIC CONTROL; INSULIN-RESISTANCE; HEPATIC LIPASE; PARTICLE-SIZE; CLASS-B; HDL SO - Atherosclerosis 2005 ;181(2):233-240 13373 UI - 2124 AU - Carrera SS AU - Kerdelhue JL AU - Langenwalter KJ AU - Brown N AU - Warmuth R AD - Inst Tecnol & Estudios Super Monterrey, Dept Quim, Monterrey 64849, NL, MexicoKansas State Univ, Dept Chem, Manhattan, KS 66506, USARutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854, USACarrera, SS, Inst Tecnol & Estudios Super Monterrey, Dept Quim, Monterrey 64849, NL, Mexico TI - Inner-phase reaction dynamics: The influence of hemicarcerand polarizability and shape on the potential energy surface of an inner-phase reaction AB - The thermal decomposition of six phenyldiazirine (2) hemicarceplexes and the spectroscopic properties of these hemicarceplexes, as well as those of one spiro[cyclobutabenzene-1(2H),3'-diazirinel (1) and one p-tolyldiazirine (3) hemicarceplex, have been investigated in order to determine the effect of a hemicarcerand on the potential energy surface of an inner-phase reaction. These hemicarceplexes have pentyl or phenethyl feet groups, three tetramethylene linkers and differ in the nature of one linker group X as follows: 1: X = (CH2)(5); 2: X = (CH2)(n) (n = 2, 3, 4), (S,S)-CH2CH[OC(CH3) O]CHCH2 and ortho-CH2C6H4CH2; 3: X = (CH2)(4). The effect of the linker group X on the structure of the phenyldiazirine hernicarceplexes was analyzed by MM2 force field calculations and leads to a change in the bending of the inner phase, which increases in the order (S,S)-CH2CH[OC(CH3) O]CHCH2 > (CH2)(4) > (CH2)(3) > (CH2)(2) > ortho-CH2C6H4CH2 and to a shortening of the center-to-center distance between the two cavitands of the host, which decreases in the order (S,S)-CH2CH[OC(CH3)O]CHCH2 < (CH2)4 < (CH2)3 < (CH2)2 < ortho-CH2C6H4CH2. All hemicarceplexes show large red shifts of the diazirine n-π*-transition in their UV/Vis absorption spectra. From the red shifts and from plots of the n-π*-excitation energy of the free diazirmes against the solvent polarizability P, the inner-phase polarizability was estimated. P ranges from 0.39 to 0.58 and is larger than the polarizabilities of common organic solvents. A comparison of the activation parameters &UDelta; H-&DDAG;, T&UDelta; S-&DDAG;, and &UDelta; G(&DDAG;) for the diazirine decomposition in the inner phase with those in the bulk phase shows that the hemicarcerand stabilizes the inner-phase transition states enthalpically by &UDelta;&UDelta; H-&DDAG; = 1.9-2.8 kcal/mol and destabilizes the transition states entropically by &UDelta; T&UDelta; S-&DDAG; = 0.2 to 3.0 kcal/mol. The enthalpic stabilization is explained with dispersion interactions between the stretched C-N bonds in the transition state and the highly electron-rich aryl units of the hernicarcerand. This is consistent with the high polarizability of the inner phase. The entropic destabilization of the inner-phase transition states is explained with a greater loss of vibrational degrees of freedoms as the transition state is reached in the inner phase as compared to the more mobile bulk solvent cage. Furthermore, the entropic destabilization decreases with an increased bending of the inner phase. This is explained with an induced-fit model. An increased hernicarcerand bending leads to an improved fit between the inner phase and the bend transition states, which reduces the loss of vibrational degrees of freedom as the transition states are reached. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) MH - Mexico|Nuevo Leon MH - USA PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Organic U5 - J;Article AV - English IS - 1434-193X UR - ISI:000229563000007 L2 - polarizability;hemicarcerand;host-guest systems;encapsulation;solvent effect;diazirines;DIELS-ALDER REACTION; ASSEMBLED COORDINATION CAGE; CAVITY-DIRECTED SYNTHESIS; THERMAL-DECOMPOSITION; BIOMIMETIC CATALYSIS; MOLECULAR CONTAINER; TRANSITION-STATE; O-BENZYNE; DIAZIRINES; GUESTS SO - European Journal of Organic Chemistry 2005 ;(11):2239-2249 13374 UI - 399 AU - Carretero-Roque L AU - Colunga B AU - Smith DG AU - Gonzalez-Ronquillo M AU - Solis-Mendez A AU - Castelan-Ortega O AD - Univ Autonoma Estado Mexico, Ctr Invest Ciencias Agropecuarias, Inst Literario 100, Colonia Ctr, Toluca 50000, MexicoUniv Autonoma Estado Mexico, Fac Vet Med, Inst Literario 100, Colonia Ctr, Toluca 50000, MexicoUniv Aberdeen, Dept Agr & Forestry, Aberdeen AB24 4FA, ScotlandCarretero-Roque, L, Univ Autonoma Estado Mexico, Ctr Invest Ciencias Agropecuarias, Inst Literario 100, Colonia Ctr, Toluca 50000, Mexico TI - Digestible energy requirements of Mexican donkeys fed oat straw and maize stover AB - The limited availability of food, together with the constraints that traditional management systems impose on the natural foraging behaviour of donkeys, often results in severe under-nutrition. Few studies have been conducted into the digestibility of different forages and little information exists on nutritional requirements of donkeys. In order to measure digestible energy requirements of donkeys under tropical conditions, an experiment was carried out at the Centre for Research in Agricultural Science (CICA) and the Faculty of Veterinary Medicine of the Universidad Autonoma del Estado de Mexico located in the Toluca valley, Central Mexico. Thirty-two donkeys of a body condition typical for Central Mexico were divided into four groups of 8 animals each according to their sex and live weight: group I (Gl) comprised male donkeys below the average body weight (102 +/- 5 kg); group 2 (G2) comprised male donkeys of average body weight (121.5 +/- 4 kg); group 3 (G3) comprised female donkeys below average weight (111.8 +/- 5 kg); and group 4 (G4) comprised female donkeys of average weight(127.6 +/- 5 kg). A diet of oat straw or maize stover and 15% alfalfa hay was offered to meet exact maintenance requirements. The donkeys were monitored for 13 months. The live weight of all animals was recorded daily in order to monitor whether maintenance requirements were being met. Mean daily digestible energy (DE) requirements were measured during the winter, spring, summer and autumn of 2003-2004. Digestible energy requirements of all four sex and liveweight groups were significantly (p > 0.05) higher during the spring than during the other seasons of the year (13.5, 18.0, 10.4 and 14.3 MJ DE per day during winter, spring, summer and autumn, respectively). Predicted DE requirements of donkeys with a live weight range betweenn 90 and 150 kg using the data from the present study were less than those predicted using scaled-down horse feeding standards MH - Mexico|Estado De Mexico MH - United Kingdom PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0049-4747 UR - ISI:000233804600009 L2 - donkey;energy;Mexico;GASTROINTESTINAL TRANSIT-TIME; ALFALFA; PONIES SO - Tropical Animal Health and Production 2005 ;37():123-142 13375 UI - 1017 AU - Carrillo-Castaneda G AU - Munoz JJ AU - Peralta-Videa JR AU - Gomez E AU - Gardea-Torresdey JL AD - Univ Texas, Dept Chem, El Paso, TX 79968, USAEspecialidad Genet, Inst Recursos Genet & Prod, Colegio Postgrad, Montecillo, MexicoUniv Autonoma Estado de Hidalgo, Ctr Invest Forestales, Tulancingo, MexicoGardea-Torresdey, JL, Univ Texas, Dept Chem, El Paso, TX 79968, USA TI - Modulation of uptake and translocation of iron and copper from root to shoot in common bean by siderophore-producing microorganisms AB - Microbes have developed high-affinity uptake mechanisms to assimilate iron (Fe) and other metals such as aluminum (Al), gallium (Ga), chromium (Cr), and copper (Cu). Siderophores, which are metal chelating compounds, and membrane receptor proteins are involved in these specialized mechanisms. A few siderophore-producing microorganisms associated with plant roots also influence the uptake of some metals. In this study, the potential microbial-assisted Cu and Fe uptake by Phaseolus vulgaris (common bean) plants was evaluated. Seedlings of cultivated common bean varieties Bayo-INIFAP (B) and Negro-150 (N) and wild types yellowish (WY) and black (WB) were developed in the presence of a Cu and Fe solution and associated with the siderophore-producing microorganisms R. leguminosarum bv . Phaseoli (strains 19, 44, and 46); Pseudomonas fluorescens (strain Avm), and Azospirillum brasilense (strain 154). Seedlings of cultivated variety N and black wild type WB inoculated with the strain CPMex.44 accumulated 71% and 30% more Fe than the un-inoculated plants, respectively; however, the wild black bean accumulated the highest absolute amount of Fe (221.56 mg/kg of dry matter) as compared with the cultivated black variety N (126.16 mg/kg of dry matter) (P<0.05). The interaction of Pseudomonas strain Avm with seedlings of the cultivated B variety and the wild type WB promoted the highest accumulation of Cu (51 and 54 mg/kg of dry matter, respectively), 7 and 14 mg more than in the respective non-inoculated seedlings. No promotion of Fe accumulation was observed in the seedlings of the cultivated B variety and in roots; instead, less Fe was accumulated. The wild type WY did not show any improvement in Cu accumulation. In this study, Rhizobium strains promoted Fe but not Cu uptake in P. vulgaris seedlings while Pseudomonas strains promoted the uptake of both Cu and Fe MH - Mexico|Estado De Mexico MH - Mexico|Hidalgo MH - USA PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 0190-4167 UR - ISI:000232342600014 L2 - plant-microbe interactions;metal assimilation;metal translocation;siderophores;PLANT-GROWTH; PSEUDOMONAS-FLUORESCENS; RHIZOBIUM-PHASEOLI; BACTERIA; TOXICITY; NICKEL SO - Journal of Plant Nutrition 2005 ;28(10):1853-1865 13376 UI - 1806 AU - Carrillo-Castaneda G AU - Munoz JJ AU - Peralta-Videa JR AD - Colegio Postgrad, Inst Recursos Genet & Productividad Edpecialidad, Montecillo 56230, MexicoUniv Autonoma Estado Hidalgo, Ctr Invest Forestales, Tulangingo 43600, Hgo, MexicoUniv Texas, Dept Chem, El Paso, TX 79968, USACarrillo-Castaneda, G, Colegio Postgrad, Inst Recursos Genet & Productividad Edpecialidad, Montecillo 56230, Mexico TI - A spectrophotometric method to determine the siderophore production by strains of fluorescent Pseudomonas in the presence of copper and iron AB - A simple procedure to determine levels of siderophore production by strains of Pseudomonas, particularly the Avm strain is described. Bacterial cells were incubated for 24 h in iron-rich (RM) and iron-limiting conditions (RM-Fe) with and without 6 and 60 mu M of CuSO4. Cells grown under iron-limiting conditions developed a green color even in the presence of Cu. The spent media supernatants from the Avrn cells grown in RM-Fe medium showed a maximum peak of absorbance at 400 nm, which suggest that this strain produced a single type of sideropbore. The presence of 60 mu M of CuSO4 in the cultures did not interfere with the detection of siderophores in the spent media. Clear supernatants obtained from cultures of 10 fluorescent Pseudonionas were diluted 1 to 10 in deionized water and the absorption at 400 nm was determined. The results demonstrated the clear discriminating capacity of this highly practical procedure to categorize a great number of fluorescent Pseudomonas strains by the range of siderophore production. (c) 2005 Elsevier B.V All rights reserved MH - Mexico|Hidalgo MH - Mexico|Estado De Mexico MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Analytical U5 - J;Article AV - English IS - 0026-265X UR - ISI:000230264500008 L2 - fluorescent Pseudomonas;metals;contamination;phytoremediation;siderophore detection;ASSAY; BACTERIA; NICKEL; SOIL SO - Microchemical Journal 2005 ;81(1):35-40 13377 UI - 345 AU - Carrillo-Cazares TA AU - Meza-Aguilar S AU - Demangeat C AD - Univ Autonoma Sinaloa, Escuela Ciencias Fisico Matemat, Culiacan 80010, MexicoInst Phys & Chim Mat Strasbourg, F-63034 Strasbourg, FranceCarrillo-Cazares, TA, Univ Autonoma Sinaloa, Escuela Ciencias Fisico Matemat, Bldv Americas & Univ,Ciudad Univ, Culiacan 80010, Mexico TI - From antiferromagnetic to ferromagnetic coupling for V adatoms on Co(001) substrates AB - We discuss the polarization of V atoms on Co(001) substrates within density functional calculations. For sub-monolayer coverage the coupling between V and Co is clearly of antiferromagnetic type whereas it changes to ferromagnetic coupling in the case of a full V monolayer on Co(001). The results obtained in the case of a sub-monolayer coverage are in agreement with recent X-ray magnetic circular dichroism by Huttel et al. [Phys. Rev. B 68, 174405 (2003)]. The transition from antiferromagnetic coupling (in the case of sub-monolayer coverage) to ferromagnetic coupling (for a full monolayer coverage) is discussed in terms of local coordination numbers and V-Co hybridization. Comparison with Cr and Mn coverages on Co(001) complicates the problem: i) submonolayer Cr coverage stabilizes the antiferromagnetic coupling between Cr and Co atoms (like for V on Co(001) whereas a Cr monolayer on Co presents in-plane antiferromagnetic coupling; ii) submonolayer Mn coverage stabilizes now the ferromagnetic coupling between Mn and Co whereas a Mn monolayer on Co(001) presents an in-plane antiferromagnetic coupling. Competition between Co induced magnetism and surface induced magnetism at V sites is discussed MH - France MH - Mexico|Sinaloa PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 5 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000234025600013 L2 - TOTAL ENERGY; VANADIUM; FILMS; REPRESENTATION; SURFACES; DENSITY SO - European Physical Journal B 2005 ;48(2):249-254 13378 UI - 2159 AU - Carrillo-Cazares TA AU - Meza-Aguilar S AU - Demangeat C AD - Univ Auton Sinalou, Esucuela Ciencias Fis Matemat, Ciudad Univ, Culiacan, MexicoInst Phys & Chim Mat Strasbourg, F-63034 Strasbourg, FranceCarrillo-Cazares, TA, Univ Auton Sinalou, Esucuela Ciencias Fis Matemat, Ciudad Univ, Av Amer Blvd,CP 80010, Culiacan, Mexico TI - The magnetic map at the V/Co interface AB - Huttel et a]. (Phys. Rev. B 68 (2003) 174405) using X-ray magnetic circular dichroism have depicted an induced magnetic moment for V atoms deposited on FCC Co(001). In the present communication, we discuss the onset of magnetic polarization of very thin V films atop Co(001) within classical density functional theory. Both local density approximation and gradient corrected approaches are used. For one V monolayer on Co(001), a ferromagnetic coupling is obtained whereas for thicker V slabs, an antiferromagnetic-like behavior is shown to be the ground state. It is clearly shown that the Co-induced polarization on V atoms is short-ranged and mainly limited to the Co-V interface. A very different magnetic behavior is observed when alloying at the V/Co interface is present.(c) 2004 Elsevier B.V. All rights reserved MH - France MH - Mexico|Sinaloa PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0304-8853 UR - ISI:000228837600022 L2 - density functional caliculations;interface magnetism;magnetic surfaces;transition metal surface;3D TRANSITION-METALS; TOTAL ENERGY; VANADIUM; DENSITY; FILMS SO - Journal of Magnetism and Magnetic Materials 2005 ;290():110-112 13379 UI - 1083 AU - Carrillo C AU - Chayet AS AU - Dougherty PJ AU - Montes M AU - Magallanes R AU - Najman J AU - Reitman J AU - Morales A AD - Codet Aris Vis Inst, Toluca, MexicoCodet Aris Vis Inst, Tijuana, MexicoCodet Aris Vis Inst, Guadalajara, Jalisco, MexicoCodet Aris Vis Inst, Juarez, MexicoCodet Aris Vis Inst, Mexico City, DF, MexicoDougherty Laser Vis, Camarillo, CA, USACarrillo, C, Via Metepec 284,Piso 2, Metepec 52140, Mexico TI - Incidence of complications during flap creation in LASIK using the NIDEK MK-2000 microkeratome in 26,600 cases AB - PURPOSE: To evaluate the incidence of intraoperative complications using the NIDEK MK-2000 microkeratome during flap creation in LASIK. METHODS: The incidence of intraoperative flap complications during LASIK using the NIDEK MK-2000 microkeratome as retrospectively studied in 26,600 procedures performed in 5 outpatients, excimer laser surgery centers. RESULTS: A total of 65 (0.244%) complications were identified 23 (0.086%) eyes had free caps, 13 (0.049%) eyes had an incomplete pass, 13 (0.049%) eyes had an epithelial defect, 11 (0.041%) eyes had buttonhole, and 5 (0.019%) eyes had irregular flap. The remaining 26.535 (99.756%) eyes had uneventful flap creation. CONCLUSIONS: Use of the NIDEK MK-2000 microkeratome resulted in a low incidence of intraoperative complications, making it a safe and reliable device for creating flaps during LASIK MH - Mexico|Distrito Federal MH - Mexico|Jalisco MH - Mexico|Estado De Mexico MH - Mexico|Baja California MH - USA PB - THOROFARE: SLACK INC RP - NOT IN FILE U3 - TC 3 U4 - Ophthalmology;Surgery U5 - J;Article AV - English IS - 1081-597X UR - ISI:000232209300016 L2 - IN-SITU KERATOMILEUSIS SO - Journal of Refractive Surgery 2005 ;21(5):S655-S657 13380 UI - 3128 AU - Carrillo L AU - Souza AJ AU - Hill AE AU - Brown J AU - Fernand L AU - Candela J AD - Proudman Oceanog Lab, Liverpool L3 5DA, Merseyside, EnglandUniv Wales, Sch Ocean Sci, Bangor, Gwynedd, WalesCtr Environm Fisheries & Aquaculture Sci, Lowestoft, Suffolk, EnglandCtr Invest Cient & Estudios Super Ensenada, Tijuana Ensenada, MexicoSouza, AJ, Proudman Oceanog Lab, 6 Brownlow St, Liverpool L3 5DA, Merseyside, England TI - Detiding ADCP data in a highly variable shelf sea: The Celtic Sea AB - This paper presents a comparison of two conventional detiding techniques carried out for ship-mounted acoustic Doppler current profiler ( ADCP) data collected in the European shelf area of the Celtic Sea during the summer of 1998. One technique consisted of extracting the vertically averaged tidal currents obtained from a barotropic three-dimensional numerical tidal model. The second technique consisted of fitting the spatiotemporal ADCP data using least squares and polynomial spatial functions. In the least squares technique, the incorporation of zero velocity normal to the coast appears to improve the estimation of the tidal currents near the coast. Quantitative comparisons of the results from both techniques with historical current meter observations are shown. However, both methods showed limitations in accurately representing the tidal currents in the study area. Consequently, an alternative detiding technique is proposed. This technique consists of blending the tidal currents derived from the numerical model with those fitted to the ADCP data from the least squares method. Improved results were obtained using the blending technique. ADCP-derived residual currents were comparable with contemporaneous flows measured using drifting buoys and also with estimates obtained by geostrophic calculations MH - United Kingdom MH - Mexico|Baja California PB - BOSTON: AMER METEOROLOGICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Ocean;Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0739-0572 UR - ISI:000227006800007 L2 - DOPPLER CURRENT PROFILER; SUBTIDAL CURRENTS; TIDAL CURRENTS; FLOW STRUCTURE; NORTH-SEA; IRISH; STRATIFICATION; CHANNEL; WATERS; FRONT SO - Journal of Atmospheric and Oceanic Technology 2005 ;22(1):84-97 13381 UI - 1601 AU - Carruthers TJB AU - van Tussenbroek BI AU - Dennison WC AD - Univ Maryland, Ctr Environm Sci, Cambridge, MD 21613, USAUniv Nacl Autonoma Mexico, Unidad Acad Puerto Morelos, Inst Ciencias Mar & Limnol, Cancun 77500, Quintana Roo, MexicoCarruthers, TJB, Univ Maryland, Ctr Environm Sci, POB 775, Cambridge, MD 21613 USA TI - Influence of submarine springs and wastewater on nutrient dynamics of Caribbean seagrass meadows AB - The east coast of the Yucatan Peninsula, Mexico, consists of highly permeable limestone, such that surface flow and rivers are absent in this region. Extensive underground cave systems connect sink holes (cenotes) to submarine springs (ojos de aqua), which vent into the seagrass meadows of the adjacent oligotrophic coastal lagoons. This study investigated the potential for these submarine springs to influence nutrient processes within seagrass meadows, by assessing nutrient status of Thalassia testudinum meadows in two contrasting coastal lagoons along the north eastern Yucatan peninsula. Tissue nutrient concentrations as well as delta(15) N values of T. testudinum were surveyed in the Puerto Morelos Reef Lagoon and the Nichupte Lagoon System, Cancun Hotel Zone, during an extended dry period and again following heavy rainfall. After a period of heavy rainfall, T. testudinum near submarine springs in Puerto Morelos Reef Lagoon had exceptionally high leaf tissue phosphorus concentrations of 0.38 +/- 0.06%. These submarine springs may have been a direct source of phosphorus and/or a source of iron to this very iron limited carbonate system. Thalassia testudinum nutrient concentrations suggest that nitrogen loading to the Nichupte Lagoon System is regionally high and has increased over the past decade (mean leaf N: 2.04% N in 1991 to 2.71% N in 2002). Nitrogen content in leaf tissue of T. testudinum was significantly higher within the poorly flushed Nichupte Lagoon System (2.93 +/- 0.12% N) than in the well-flushed Puerto Morelos Reef Lagoon (1.80 +/- 0.07% N). Stable isotope ratios of nitrogen suggest that this high and increasing nitrogen loading within the Nichupte Lagoon System is a result of wastewater nitrogen (delta(15) N 9.06 +/- 0.07 in northern Nichupte Lagoon System vs. 1.69 +/- 0.07 in Puerto Morelos Reef Lagoon). (c) 2005 Elsevier Ltd. All rights reserved MH - USA MH - Mexico|Quintana Roo PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 2 U4 - Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0272-7714 UR - ISI:000230873200005 L2 - nutrient sources;sewage;submarine springs;groundwater;eutrophication;Thalassia testudinum;delta N-15;nitrogen;phosphorus;iron;seagrass;conceptual diagrams;EELGRASS ZOSTERA-MARINA; N-P RATIOS; THALASSIA-TESTUDINUM; FLORIDA BAY; GROUNDWATER DISCHARGE; TERRIGENOUS SEDIMENTS; CARBONATE SEDIMENTS; LIGHT-INTENSITY; SOUTH SULAWESI; NITROGEN SO - Estuarine Coastal and Shelf Science 2005 ;64(2-3):191-199 13382 UI - 344 AU - Carvajal E AU - Navarro O AU - Allub R AU - Avignon M AU - Alascio B AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCtr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble, FranceCarvajal, E, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Ferromagnetic transition in ordered double perovskites and related alloys AB - We study the electronic and magnetic properties of ordered perovskites Sr 2FeMO6 (where M is a transition metal), among which some compounds, like Sr2FeMoO6 are half-metallic with high Curie temperature while Sr2FeWO6 is an antiferromagnetic insulator. Using a double exchange type model with an interaction between localized spins and conduction electrons together with a tight-binding Hamiltonian and the renormalized perturbation expansion method, we study the behavior of T-c as a function of the number of conduction electrons and also as a function of the Fe-M energy difference. We also consider the Sr2FeMoxW1-xO6 compounds which present a magnetic and metal-insulator transition as a function of doping MH - Argentina MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 6 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1434-6028 UR - ISI:000234025600005 L2 - LOW-FIELD MAGNETORESISTANCE; ELECTRONIC-STRUCTURE; ELECTRICAL PROPERTIES; MAGNETIC-PROPERTIES; SR2FEMOO6; DISORDER; CRYSTAL; OXIDE SO - European Physical Journal B 2005 ;48(2):179-187 13383 UI - 1643 AU - Carvajal E AU - Navarro O AU - Allub R AU - Avignon M AU - Alascio B AD - Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCtr Atom Bariloche, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble, FranceNavarro, O, Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Mexico City 04510, DF, Mexico TI - Electronic properties of double perovskite compounds AB - The double perovskites family A(2)MM'O-6 (A being an alkaline-earth and M, M' two different transition-metal elements) is considered as a serious candidate for magnetoelectronic applications. It appears to be fundamental to understand the role of electronic parameters controlling the half-metallic ground state and high Curie temperature T,. In this respect it is very interesting that different members of the family present a variety of electronic and magnetic properties. Among them, Sr2FeMoO6, and Sr2FeReO6, are half-metallic ferromagnets with fairly large Tc(approximate to 450 K) while Sr2FeWO6 is known as an antiferromagnetic insulator with T, 37 K. As expected, a metal-insulator and magnetic transition has been reported in the substituted compounds Sr2FeMoxW1-xO6. To elucidate the origin of such different behavior in these Sr2FeMO6 double perovskites we consider a correlated electron picture with localized Fe-spins (d(5) configuration) and conduction electrons originating from M (M = Mo, Re or W) together with the double-exchange type interaction taking place in the hybridized Fe-M t(2g) band and competing with the antiferromagnetic superexchange interactions between the Fe-spins. We consider here only the ordered stucture in which Fe and M constitute two interpenetrating sublattices. Using a tight-binding model and the renormalized perturbation expansion technique, we calculate the density of states and determine the behaviour of the critical temperature as a function of the band filling and the Fe-M charge transfer energy. This allows us to discuss the stability of the half-metallic ferromagnetic state with increasing charge transfer energy. We will also discuss the electronic properties and the ferro-antiferromagnetic transition in the substituted compounds like Sr2FeMoxW1-xO6, when disorder among Mo/W takes place in the M-sublattice. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim MH - Argentina MH - France MH - Mexico|Distrito Federal PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 4 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 0370-1972 UR - ISI:000230776400045 L2 - MAGNETIC-PROPERTIES; SR2FEMOO6 SO - Physica Status Solidi B-Basic Solid State Physics 2005 ;242(9):1942-1945 13384 UI - 2408 AU - Carvajal R AU - Wessel N AU - Vallverdu M AU - Caminal P AU - Voss A AD - Tech Univ Catalonia, Biomed Engn Res Ctr CREB, ESAII Dept, Barcelona 08028, SpainUniv Sinaola, Fac Comp Sci, Mazatlan 82017, MexicoUniv Potsdam, Inst Phys, D-14415 Potsdam, GermanyUniv Appl Sci, Fac Med Engn, D-07745 Jena, GermanyVallverdu, M, Tech Univ Catalonia, Biomed Engn Res Ctr CREB, ESAII Dept, Pau Gargallo 5, Barcelona 08028, Spain TI - Correlation dimension analysis of heart rate variability in patients with dilated cardiomyopathy AB - A correlation dimension analysis of heart rate variability (HRV) was applied to a group of 55 patients with dilated cardiomyopathy (DCM) and 55 healthy subjects as controls. The 24-h RR time series for each subject was divided into segments of 10,000 beats to determine the correlation dimension (CD) per segment. A study of the influence of the time delay (tag) in the calculation of CD was performed. Good discrimination between both groups (p < 0.005) was obtained with tag values of 5 or greater. CD values of DCM patients (8.4 &PLUSMN; 1.9) were significantly lower than CD values for controls (9.5 &PLUSMN; 1.9). An analysis of CD values of HRV showed that for healthy people, CD night values (10.6 &PLUSMN; 1.8) were significant greater than CD day values (9.2 &PLUSMN; 1.9), revealing a circadian rhythm. In DCM patients, this circadian rhythm was lost and there were no differences between CD values in day (8.8 &PLUSMN; 2.4) and night (8.9 &PLUSMN; 2. 1). © 2005 Elsevier Ireland Ltd. All rights reserved MH - Germany MH - Mexico|Sinaloa MH - Spain PB - CLARE: ELSEVIER IRELAND LTD RP - NOT IN FILE U3 - TC 8 U4 - Computer Science, Interdisciplinary Applications;Computer Science, Theory & Methods;Engineering, Biomedical;Medical Informatics U5 - J;Article AV - English IS - 0169-2607 UR - ISI:000228947100004 L2 - heart rate variability;non-linear analysis;correlation dimension;circadian rhythms;dilated cardiomyopathy;CORONARY-ARTERY DISEASE; TIME-SERIES; CIRCADIAN-RHYTHM; NONLINEAR DYNAMICS; COMPLEX DYNAMICS; INTERVALS; ENTROPY; CLASSIFICATION; ORGANIZATION; ARRHYTHMIAS SO - Computer Methods and Programs in Biomedicine 2005 ;78(2):133-140 13385 UI - 1623 AU - Casanova-Rosado AJ AU - Medina-Solis CE AU - Casanova-Rosado JF AU - Vallejos-Sanchez AA AU - Maupome G AU - vila-Burgos L AD - Univ Autonoma Campeche, Fac Odontol, Campeche, MexicoInst Nacl Salud Publ, Ctr Invest Sistemas, Cuernavaca, Morelos, MexicoKaiser Permanente Ctr Hlth Res, Portland, OR, USAMedina-Solis, CE, Privada Altillo S-N Entre Av Cent & Pedro Moreno, Campeche 24040, Mexico TI - Dental caries and associated factors in Mexican schoolchildren aged 6-13 years AB - The objectives of the present study were to establish dental caries prevalence ( percentage with caries) and experience in the primary and permanent dentition (dmft and DMFT) of 6 to 13-year-old schoolchildren in Campeche, Mexico, and to estimate the contributing roles of the likely risk indicators. A cross-sectional study was carried out in 1,644 children aged 6-13 years. Self-administered questionnaires obtained information on social, economic, behavioral, and demographic variables. The primary dentition of 1,309 children and the permanent dentition of 1,640 children were evaluated in the oral examinations. The main outcome measures were DMFT, dmft, and SiC indices. Data were modeled using logistic regression analysis. The overall caries prevalence was 77.4%, 73.6% in the primary dentition (61.6% in 6-year-olds), and 49.4% in the permanent dentition. The dmft and DMFT indices were 2.85 +/- 2.73 and 1.44 +/- 2.05, respectively (DMFT = 3.11 +/- 2.62 in 12-year-olds). The SiC index was 6.05 at 12 years of age. Associated variables to dental caries in both dentitions were presence of enamel defects, presence of dental plaque, low socio-economic status, female sex, and older age. Mother's schooling was negatively associated (OR = 0.95) with caries in primary dentition. Caries experience in the primary dentition (OR = 6.02) was positively associated with caries in the permanent dentition. Dental caries status in these Mexican children was closer to the goals proposed by the WHO/FDI for 2000 than previous studies. This study has identified clinical, socioeconomic, and behavioral determinants for dental caries in primary and permanent dentition on Mexican schoolchildren MH - Mexico|Campeche MH - Mexico|Morelos MH - USA PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 13 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0001-6357 UR - ISI:000230846900009 L2 - dental caries;dmft;DMFT;epidemiology;Mexico;schoolchildren;significant caries index;PERMANENT DENTITION; URBAN-POPULATION; RISK-ASSESSMENT; UNITED-STATES; ORAL HYGIENE; PREVALENCE; CHILDREN; EXPERIENCE; HEALTH; HYPOPLASIA SO - Acta Odontologica Scandinavica 2005 ;63(4):245-251 13386 UI - 604 AU - Casanova-Rosado JF AU - Medina-Solis CE AU - Vallejos-Sanchez AA AU - Casanova-Rosado AJ AU - Maupome G AU - vila-Burgos L AD - Univ Autonoma Campeche, Fac Odontol, Campeche, MexicoInst Nacl Salud Publ, Ctr Invest Sistemas Salud, Cuernavaca, Morelos, MexicoIndiana Univ Purdue Univ, Sch Dent, Oral Hlth Res Inst, Indianapolis, IN 46202, USAMedina-Solis, CE, Privada Altillo S-N Entre Ave Cent & Pedro Moreno, Campeche 24040, Mexico TI - Dental attrition and associated factors in adolescents 14 to 19 years of age: A pilot study AB - Purpose: This cross-sectional study evaluated the relationship between attrition and diverse variables in 390 Mexican adolescents aged 14 to 19 years. Materials and Methods: An ordinal scoring system was used to describe the severity of attrition. Results: Attrition prevalence was 33.3% and was associated with older age, presence of defective restorations, Class II malocclusion, and perception of stress level. Conclusion: Our results suggest that attrition is present in 1 of every 3 adolescents, MH - Mexico|Campeche MH - Mexico|Morelos MH - USA PB - CAROL STREAM: QUINTESSENCE PUBL CO INC RP - NOT IN FILE U3 - TC 0 U4 - Dentistry, Oral Surgery & Medicine U5 - J;Article AV - English IS - 0893-2174 UR - ISI:000233420100012 L2 - TOOTH WEAR SO - International Journal of Prosthodontics 2005 ;18(6):516-519 13387 UI - 2314 AU - Casanueva E AU - Viteri FE AU - Erazo B AU - Rosales X AU - Tolentino M AD - Inst Nacl Perinatol Mexico, Publ Hlth Res, Mexico City 11000, DF, MexicoChildrens Hosp Oakland, Res Inst, Oakland, CA 94720, USA TI - Anemia, oxidative stress and iron supplementation on pregnant women MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000227610903381 SO - Faseb Journal 2005 ;19(5):A1482-A1482 13388 UI - 2317 AU - Casotti G AU - Herrera LG AU - Braun EJ AU - Carlos MA AU - Flores JJ AD - W Chester Univ, Dept Biol, W Chester, PA 19383, USAUniv Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, MexicoUniv Arizona, Arizona Hlth Sci Ctr, Tucson, AZ 85724, USAInst Ecol & Sistemat, Dept Verterrados, Havana, Cuba TI - Relationships between renal morphology and diets in 23 species of bats (family Chiroptera) MH - Cuba MH - Mexico|Distrito Federal MH - USA PB - BETHESDA: FEDERATION AMER SOC EXP BIOL RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Biology;Cell Biology U5 - J;Meeting Abstract AV - English IS - 0892-6638 UR - ISI:000227610904169 SO - Faseb Journal 2005 ;19(5):A1583-A1583 13389 UI - 2648 AU - Caspeta-Mandujano JM AU - Cabanas-Carranza G AU - Salgado-Maldonado G AU - Gosztonyi AE AU - Cremonte F AD - Autonomous Univ Morelos State, Fac Biol Sci, Lab Parasitol Wild Anim, Cuernavaca, Morelos, MexicoAutonomous Univ Morelos State, Biol Res Ctr, Cuernavaca, Morelos, MexicoAutonomous Univ Morelos State, Fac Ciencias Agropecuarias, Parasitol Lab, Cuernavaca, Morelos, MexicoNatl Autonomous Univ Mexico, Inst Biol, Mexico City 04510, DF, MexicoConsejo Nacl Invest Cient & Tecn, Ctr Nacl Patagon, Puerto Madryn, ArgentinaCaspeta-Mandujano, JM, Autonomous Univ Morelos State, Fac Biol Sci, Lab Parasitol Wild Anim, Av Univ 1001,Col Chamilpa,CP 62210, Cuernavaca, Morelos, Mexico TI - Nematode parasites of the characid freshwater fish Brycon guatemalensis in the Usumacinta River, Chiapas, Mexico AB - During the study of the helminth parasites of some fishes of the Usumacinta River in the locality Frontera Corozal (Frontera Echeverria), State of Chiapas, Mexico, 2 species of South American nematodes, Neocucullanus neocucullanus Travassos, Artigas et Pereira, 1928 from Brazil and Rhabdochona acuminata (Molin, 1860) from Brazil, Ecuador and Argentina were recovered from the intestine of the characid fish, Brycon guatemalensis. Findings of these nematode species represent new host and geographical records MH - Argentina MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - BRATISLAVA: SLOVAK ACADEMIC PRESS LTD RP - NOT IN FILE U3 - TC 4 U4 - Parasitology;Zoology U5 - J;Article AV - English IS - 0440-6605 UR - ISI:000228099100008 L2 - nematodes;Neocucullanus;Rhabdochona;freshwater fish;Brycon guatemalensis;Argentina;Brazil;Mexico SO - Helminthologia 2005 ;42(1):41-44 13390 UI - 943 AU - Casserly IP AU - bou-Chebl A AU - Fathi RB AU - Lee DS AU - Saw J AU - Exaire JE AU - Kapadia SR AU - Bajzer CT AU - Yadav JS AD - Cleveland Clin Fdn, Dept Cardiovasc Med, Cleveland, OH 44195, USADenver Vet Affairs Med Ctr, Denver, CO, USAUniv Colorado, Hlth Sci Ctr, Denver, CO 80202, USAVancouver Gen Hosp, Vancouver, BC, CanadaNatl Inst Hlth, Mexico City, DF, MexicoYadav, JS, Cleveland Clin Fdn, Dept Cardiovasc Med, 9500 Euclid Ave,Desk F25, Cleveland, OH 44195 USA TI - Slow-flow phenomenon during carotid artery intervention with embolic protection devices - Predictors and clinical outcome AB - OBJECTIVES The purpose of this research was to define the predictors of the "slow-reflow" phenomenon during carotid artery intervention with filter-type embolic protection devices (EPDs) and to determine its prognostic significance. BACKGROUND During carotid artery intervention using filter-type EPDs, we have observed cases in which there is angiographic evidence of a significant reduction in antegrade flow in the internal carotid artery proximal to the filter device, termed "slow-flow." The predictors of this phenomenon and its prognostic significance are unknown. METHODS Using a single-center prospective carotid intervention registry, patients with slow-flow were compared to patients with normal flow during carotid intervention with respect to clinical, procedural, and lesion characteristics, and the 30-day incidence of death and stroke. RESULTS A total of 414 patients underwent 453 carotid artery interventions using EPDs. Slow-flow occurred in 42 patients (10.1%) undergoing 42 carotid interventions (9.3%), and most commonly occurred after post-stent balloon dilatation (71.4%). Multivariate logistic regression analysis identified the following predictors of slow-flow: recent history (< 6 months) of stroke or transient ischemic attack (odds ratio [OR] 2.8, 95% confidence interval [CI] 1.4 to 5.6, p = 0.004), increased stent diameter (OR 1.4, 95% CI 1.02 to 1.94, p = 0.044), and increased patient age (OR 1.05, 95% CI 1.01 to 1.09, p = 0.025). Among patients with slow-flow, the 30-day incidence of stroke or death was 9.5% compared to 2.9% in patients with normal flow (chi-square = 4.73, p = 0.03). This difference was driven by the disparity in the 30-day incidence of stroke (9.5% vs. 1.7%). CONCLUSIONS Slow-flow during carotid intervention with EPDs is a frequent event that is associated with an excess risk of periprocedural stroke. The association of the phenomenon with clinically symptomatic carotid lesions and use of larger stent diameters MH - Canada MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: ELSEVIER SCIENCE INC RP - NOT IN FILE U3 - TC 4 U4 - Cardiac & Cardiovascular Systems U5 - J;Article AV - English IS - 0735-1097 UR - ISI:000232579400008 L2 - CEREBRAL PROTECTION; HISTOPATHOLOGIC ANALYSIS; EMBOLIZATION SO - Journal of the American College of Cardiology 2005 ;46(8):1466-1472 13391 UI - 1646 AU - Castanda-Fernandez-De-Lara V AU - Serviere-Zaragoza E AU - Hernandez-Vazquez S AU - Butler MJ AD - CIBNOR, Ctr Invest Biol Noroeste, La Paz 23090, BCS, MexicoOld Dominion Univ, Dept Biol Sci, Norfolk, VA 23529, USACastanda-Fernandez-De-Lara, V, CIBNOR, Ctr Invest Biol Noroeste, Mar Bermejo 195,Col Playa Palo Santa Rita,Apdo Po, La Paz 23090, BCS, Mexico TI - Feeding ecology of juvenile spiny lobster, Panulirus interruptus, on the Pacific coast of Baja California Sur, Mexico AB - Many aspects of the early life history of the red lobster Panulirus interruptus are little known, including the relationship between habitat structure, food resource availability, and nutrition of juveniles. We investigated the spatial and temporal differences in food intake, diet composition, and nutritional condition of juveniles at two sites along the Pacific coast of the Baja California Peninsula (Mexico) with contrasting oceanographic and biological conditions. One site (Arvin) is located inside a protected bay, Bahia Tortugas, where the waters are cooler and temperate seagrasses and macroalgae are the dominant benthic flora. The second site (Queen) in Bahia Sebastian Vizcaino was located along a more open coastline where seawater temperatures were higher and the benthic flora more indicative of warmer seas. At both sites, we randomly sampled epifauna within vegetated habitats to estimate the seasonal availability of food resources for juvenile lobsters from autumn 2001 until summer 2002. Concurrently, we used traps to sample P. interruptus juveniles for stomach content analysis. At both sites, Amphipoda, Gastropoda, and Polychaeta dominated the epifauna assemblages, as determined by an Index of Importance. Juvenile P. interruptus primarily consumed crustaceans (mostly amphipods and isopods) and vegetal material (surf-grass Phyllospadix spp. and calcareous algae), but their food spectrum was wide. Manly's Index of Resource Selection indicated that lobsters preferred some prey (e.g., Brachyurans) over others despite their low Index of Importance. Despite marked differences in the types of food and their availability between sites, there were no significant differences in the nutritional condition (e.g., relative weight of the digestive gland) of lobsters at the two sites. However, the nutritional condition of lobsters was effected during some seasons. In particular, their condition deteriorated during the spring (April 2002) at Arvin, as did the proportion of individuals with empty stomachs. This study shows the feeding adaptation capacity of the juvenile California spiny lobster P. interruptus to different environmental conditions prevalent in Centre Baja California Peninsula MH - Mexico|Baja California Sur MH - USA PB - WELLINGTON: RSNZ PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Fisheries;Marine & Freshwater Biology;Oceanography U5 - J;Article AV - English IS - 0028-8330 UR - ISI:000230698000021 L2 - feeding ecology;spiny lobsters;Panulirus interruptus;juveniles;WESTERN ROCK LOBSTER; LONGIPES MILNE-EDWARDS; CYGNUS GEORGE; NUTRITIONAL STATE; BAHIA-TORTUGAS; ARGUS; DIET; GROWTH; CONSTITUENTS; SETTLEMENT SO - New Zealand Journal of Marine and Freshwater Research 2005 ;39(2):425-435 13392 UI - 1114 AU - Castaneda CS AU - Puente JCI AU - Ochoa RAL AU - Plasse TF AU - Powers BL AU - Rayburn WF AD - Cytokine PharmaSci Inc, King Of Prussia, PA 19406, USAClin Materno Infante, Toluca, MexicoHosp Ginelo Obstet, Mexico City, DF, MexicoHosp Reg 1 Octubre, Mexico City, DF, MexicoUniv New Mexico, Dept Obstet & Gynecol, Albuquerque, NM 87131, USAPowers, BL, Cytokine PharmaSci Inc, 150 S Warner Rd,Suite 420, King Of Prussia, PA 19406 USA TI - Misoprostol dose selection in a controlled-release vaginal insert for induction of labor in nulliparous women AB - Objective: The purpose of this study was to identify the maximum tolerable dose and to determine the efficacy of different misoprostol dose reservoirs in an intravaginal controlled-release hydrogel polymer. Study design: Nulliparous women at >= 37 weeks' gestation requiring cervical ripening and induction of labor were treated with misoprostol in a controlled-release, retrievable hydrogel polymer vaginal insert. Sequential cohorts of 6 patients were to be treated with escalating dose reservoirs of 25, 50, 100, 200, and 300 mu g. The insert was to be removed upon onset of active labor, at 24 hours, or earlier if treatment-related adverse events occurred. The safety end point was determination of the maximum tolerable dose (MTD) based on occurrence of hyperstimulation syndrome. Our primary efficacy end point was time to vaginal delivery. Results: Increasing reservoir doses of misoprostol up to 100 mu g produced more rapid increases in modified Bishop scores, less need for oxytocin, and a shorter time to vaginal delivery. Doses above 100 mu g did not further enhance cervical ripening or shorten time to vaginal delivery. The median time to vaginal delivery was 14.2 hours using the 100 mu g dose. Uterine hyperstimulation and adverse fetal heart rate effects occurred with the 200 and 300 mu g inserts. Conclusion: The 100 mu g vaginal insert resulted in successful cervical ripening and rapid vaginal delivery with an acceptable safety profile for future randomized clinical trials. (C) 2005 Mosby, Inc. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - ST LOUIS: MOSBY, INC RP - NOT IN FILE U3 - TC 3 U4 - Obstetrics & Gynecology U5 - J;Article AV - English IS - 0002-9378 UR - ISI:000232013700030 L2 - induction of labor;misoprostol;controlled-release;vaginal insert;cervical ripening SO - American Journal of Obstetrics and Gynecology 2005 ;193(3):1071-1075 13393 UI - 2872 AU - Castano E AU - Flores RD AU - Zapata LCR AD - Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Merida, Yucatan, MexicoClin & Regulatory Affairs Biosite Inc, San Diego, CA 92121, USACtr Invest Cientif Yucatan, Unidad Biotecnol, Merida, Yucatan, MexicoCastano, E, Ctr Invest Cientif Yucatan, Unidad Bioquim & Biol Mol Plantas, Calle 43 130,Col Chuburna Hidalgo,CP 97200, Merida, Yucatan, Mexico TI - An easy approach for the purification of native TFIIH AB - Transcriptional regulation depends on the appropriate set of positive and negative regulating signals in order to provide the correct gene expression. In vitro studies in eukaryotic gene expression over the last few years have provided a wealth of information about new factors involved in the regulation of genes. However, the dissection of this mechanism requires the addition of well-characterized general transcription factors; with the exception of TFIID and TFIIH, all others can easily be expressed in a recombinant form. Here we provide a simple methodology to obtain partially purified transcriptionally active TFIIH free from other general transcription factors and active in transcription. (c) 2004 Elsevier B.V. All rights reserved MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Biochemical Research Methods;Biochemistry & Molecular Biology;Biophysics U5 - J;Article AV - English IS - 0165-022X UR - ISI:000227582600003 L2 - transcription;TFIIH;general transcription factors;purification;RNA-POLYMERASE-II; TRANSCRIPTION FACTOR IIH; DNA-REPAIR; PROMOTER; ACTIVATION; INITIATION; COMPLEX; YEAST; ATP SO - Journal of Biochemical and Biophysical Methods 2005 ;62(3):207-213 13394 UI - 685 AU - Castanon G AU - Koa CG AU - Chien SF AU - Low ALY AU - Bononi A AD - Monterrey Inst Technol & Higher Educ, Ctr Elect & Telecommun, Monterrey, NL, MexicoMultimedia Univ, Fac Engn & Technol, Melaka 75450, MalaysiaUniv Parma, Dipartimento Ingn Informaz, I-43100 Parma, ItalyCastanon, G, Monterrey Inst Technol & Higher Educ, Ctr Elect & Telecommun, Ave Garza Sada 2501, Monterrey, NL, Mexico TI - Analysis of ShuffleNets with limited number of wavelength converters employing deflection routing AB - Optical node performance analysis in terms of number of wavelength converters for a multihop optical ShuffleNet under deflection routing is presented. From the computed results for a given number of wavelengths, it is found that in order to achieve the minimum deflection probability at full load, the number of wavelength converters required is at most 60% of the number of wavelengths. Any additional wavelength converters would not be necessary in reducing the overall deflection probability. These upper-bound findings are indeed helpful for network engineers designing a cost-effective network node. (c) 2004 Optical Society of America MH - Italy MH - Malaysia MH - Mexico|Nuevo Leon PB - WASHINGTON: OPTICAL SOC AMER RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Hardware & Architecture;Computer Science, Information Systems;Optics;Telecommunications U5 - J;Article AV - English IS - 1536-5379 UR - ISI:000233163800003 L2 - OPTICAL NETWORKS; HOT-POTATO; CONVERSION SO - Journal of Optical Networking 2005 ;4(1):28-37 13395 UI - 1988 AU - Castellanos-Guzman AG AU - Trujillo-Torrez M AU - Czank M AD - Univ Guadalajara, CUCEI, DIP, Lab Invest Mat, Guadalajara 44281, Jalisco, MexicoUniv Guadalajara, CUCEI, Dept Fis, Guadalajara 44281, Jalisco, MexicoUniv Kiel, Inst Geowissensch, D-24098 Kiel, GermanyCastellanos-Guzman, AG, Univ Guadalajara, CUCEI, DIP, Lab Invest Mat, Apdo Postal 2-638, Guadalajara 44281, Jalisco, Mexico TI - Transmission electron and optical microscopy of the domain structure of Ni3B7O13Br ferroic boracite AB - The study investigated the domain structure of nickel bromine boracite single crystals, by means of polarised-light in conjunction with transmission electron microscopy. Single crystals of Ni3B7O13Br were grown by chemical transport reactions in closed quartz ampoules, in the temperature range of 1130 K and were examined by polarising optical microscopy (PLM), and transmission electron microscopy (TEM). PLM was also used in order to study the behaviour of birefringence as a function of temperature. For TEM the single crystals were crushed and mounted on holey carbon films. Comparative electron microscope images were useful for revealing the domain structure of this fully ferroelectric/fully ferroelastic material previously observed between the crossed polars of an optical microscope. X-ray diffraction analysis of the crystal under study was performed at room temperature. (c) 2005 Published by Elsevier B.V MH - Germany MH - Mexico|Jalisco PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 1 U4 - Materials Science, Multidisciplinary;Physics, Condensed Matter U5 - J;Article AV - English IS - 0921-5107 UR - ISI:000229817700014 L2 - boracite crystals;domains;polarised-light microscopy;transmission electron microscopy;ferroelectricity;ferroelasticity SO - Materials Science and Engineering B-Solid State Materials for Advanced Technology 2005 ;120(1-3):59-63 13396 UI - 3369 AU - Castellanos AE AU - Martinez MJ AU - Llano JM AU - Halvorson WL AU - Espiricueta M AU - Espejel I AD - Univ Sonora, DICTUS, Hermosillo 83000, Sonora, MexicoUniv Arizona, Sch Nat Resources, Tucson, AZ 85721, USAReserva Biosfera Pinacate, San Luis Rio Colorado, Sonora, MexicoUniv Arizona, US Geol Survey, SW Biol Sci Ctr, Tucson, AZ 85721, USAUniv Autonoma Baja California, Fac Ciencias, Ensenada, Baja California, MexicoCastellanos, AE, Apdo Postal 54, Hermosillo 83000, Sonora, Mexico TI - Successional trends in Sonoran Desert abandoned agricultural fields in northern Mexico AB - Excessive ground-water use and saline intrusion to the aquifer led, in less than three decades, to an increase in abandoned agricultural fields at La Costa de Hermosillo, within the Sonoran Desert. Using a chronosequence from years since abandonment, patterns of field succession were developed. Contrary to most desert literature species replacement was round, both in fields with and without saline intrusion. Seasonal photosynthetic capacity as well as water and nitrogen use efficiencies were different in dominant early and late successional plant species. These ecological findings provided a framework for a general explanation of species dominance and replacement within abandoned agricultural fields in the Sonoran Desert. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Baja California MH - Mexico|Sonora MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Ecology;Environmental Sciences U5 - J;Article AV - English IS - 0140-1963 UR - ISI:000226455000006 L2 - desert succession;abandoned fields;water use efficiency;nitrogen use efficiency;photosynthesis;Sonoran Desert;salinized fields;MICROPHYLLUM FOOTHILL PALOVERDE; EARLY SECONDARY SUCCESSION; LEAF NITROGEN; CHIHUAHUAN DESERT; VEGETATION CHANGE; NUTRIENT CONTENT; USE EFFICIENCY; WATER; COMMUNITY; PLANTS SO - Journal of Arid Environments 2005 ;60(3):437-455 13397 UI - 1361 AU - Castilla JC AU - Defeo O AD - Catholic Univ Chile, Fac Ciencias Biol, Ctr Estudios Avanzados Ecol & Biodiversidad, Santiago, ChileCINVESTAV Merida, Merida 97310, Yucatan, MexicoCastilla, JC, Catholic Univ Chile, Fac Ciencias Biol, Ctr Estudios Avanzados Ecol & Biodiversidad, Casilla 114-D, Santiago, Chile TI - Paradigm shifts needed for world fisheries MH - Chile MH - Mexico|Yucatan PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 7 U4 - Multidisciplinary Sciences U5 - J;Letter AV - English IS - 0036-8075 UR - ISI:000231543300019 L2 - MARINE RESOURCE-MANAGEMENT SO - Science 2005 ;309(5739):1324-1325 13398 UI - 1335 AU - Castillo-Blum SE AU - Shapiro PJ AD - Natl Autonomous Univ Mexico, Fac Med, Dept Quim Inorgan, Mexico City 04510, DF, MexicoUniv Idaho, Dept Chem, Moscow, ID 83844, USACastillo-Blum, SE, Natl Autonomous Univ Mexico, Fac Med, Dept Quim Inorgan, Mexico City 04510, DF, Mexico TI - Preface to the special issue of Coordination Chemistry Reviews linked to the XXXVIth International Conference on Coordination Chemistry, July 18-23, 2004, Merida, Mexico MH - Mexico|Distrito Federal MH - USA PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Inorganic & Nuclear U5 - J;Editorial Material AV - English IS - 0010-8545 UR - ISI:000231534300001 SO - Coordination Chemistry Reviews 2005 ;249(17-18):1691-1692 13399 UI - 98 AU - Castillo-Gallegos E AU - 't Mannetje L AU - uja-Schunemann A AD - UNAM, FMVZ, CEIEGT, Martinez De La Torre 93600, MexicoUniv Wageningen & Res Ctr, NL-6700 HB Wageningen, NetherlandsUADY, Merida, MexicoCastillo-Gallegos, E, UNAM, FMVZ, CEIEGT, Martinez De La Torre 93600, Mexico TI - Production and persistence of a native pasture-Arachis pintoi association in the humid tropics of Mexico MH - Mexico|Veracruz MH - Mexico|Yucatan MH - Netherlands PB - ST LUCIA: TROPICAL GRASSLAND SOC AUST RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science;Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0049-4763 UR - ISI:000235646600031 SO - Tropical Grasslands 2005 ;39(4):238-238 13400 UI - 99 AU - Castillo-Gallegos E AU - Jarillo-Rodriguez J AU - Ocana-Zavaleta E AU - Marin-Mejia B AU - 't Mannetje L AU - uja-Schunemann A AD - UNAM, FMVZ, CEIEGT, Martinez De La Torre 93600, MexicoUniv Wageningen & Res Ctr, NL-6700 HB Wageningen, NetherlandsUADY, Merida, MexicoCastillo-Gallegos, E, UNAM, FMVZ, CEIEGT, Martinez De La Torre 93600, Mexico TI - Performance of dual-purpose cows on a native pasture-Arachis pintoi association in the humid tropics of Mexico MH - Mexico|Veracruz MH - Mexico|Yucatan MH - Netherlands PB - ST LUCIA: TROPICAL GRASSLAND SOC AUST RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science;Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0049-4763 UR - ISI:000235646600032 SO - Tropical Grasslands 2005 ;39(4):239-239 13401 UI - 1524 AU - Castillo-Tejas J AU - Alvarado JFJ AU - Gonzalez-Alatorre G AU - Luna-Barcenas G AU - Sanchez IC AU - ias-Salinas R AU - Manero O AD - Dept Chem Engn, Guanajuato 38010, MexicoInst Politecn Nacl, CINVESTAV, Unidad Queretaro, Queretaro 76230, MexicoUniv Texas, Dept Chem Engn, Austin, TX 78712, USAInst Politecn Nacl, Unidad Profes Adolfo Lopez Moteos Zacatenco, ESIQIE Chem Engn Dept, Mexico City 07738, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoCastillo-Tejas, J, Univ Autonoma Tlaxcala, Mexico City, DF, Mexico TI - Nonequilibrium molecular dynamics of the rheological and structural properties of linear and branched molecules. Simple shear and poiseuille flows; instabilities and slip AB - Nonequilibrium molecular-dynamics simulations are performed for linear and branched chain molecules to study their rheological and structural properties under simple shear and Poiseuille flows. Molecules are described by a spring-monomer model with a given intermolecular potential. The equations of motion are solved for shear and Poiseuille flows with Lees and Edward's [A. W. Lees and S. F. Edwards, J. Phys. C 5, 1921 (1972)] periodic boundary conditions. A multiple time-scale algorithm extended to nonequilibrium situations is used as the integration method, and the simulations are performed at constant temperature using Nose-Hoover [S. Nose, J. Chem. Phys. 81, 511 (1984)] dynamics. In simple shear, molecules with flow-induced ellipsoidal shape, having significant segment concentrations along the gradient and neutral directions, exhibit substantial flow resistance. Linear molecules have larger zero-shear-rate viscosity than that of branched molecules, however, this behavior reverses as the shear rate is increased. The relaxation time of the molecules is associated with segment concentrations directed along the gradient and neutral directions, and hence it depends on structure and molecular weight. The results of this study are in qualitative agreement with other simulation studies and with experimental data. The pressure (Poiseuille) flow is induced by an external force F-e simulated by confining the molecules in the region between surfaces which have attractive forces. Conditions at the boundary strongly influence the type of the slip flow predicted. A parabolic velocity profile with apparent slip on the wall is predicted under weakly attractive wall conditions, independent of molecular structure. In the case of strongly attractive walls, a layer of adhered molecules to the wall produces an abrupt distortion of the velocity profile which leads to slip between fluid layers with magnitude that depends on the molecular structure. Finally, the molecular deformation under flow depends on the attractive force of the wall, in such a way that molecules are highly deformed in the case of strong attracting walls. (C) 2005 American Institute of Physics MH - Mexico|Distrito Federal MH - Mexico|Guanajuato MH - Mexico|Queretaro MH - USA PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 2 U4 - Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0021-9606 UR - ISI:000231168700077 L2 - LOW-DENSITY POLYETHYLENE; SHARKSKIN MELT FRACTURE; POLYMER MELTS; WALL SLIP; EXTRUSION INSTABILITIES; VISCOELASTIC PROPERTIES; TRANSPORT-PROPERTIES; CAPILLARY EXTRUSION; MACROSCOPIC SLIP; PRESSURE TENSOR SO - Journal of Chemical Physics 2005 ;123(5): 13402 UI - 2119 AU - Castillo-Vallejo VM AU - Gupta V AD - IPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, Merida 97310, Yucatan, VenezuelaUniv Guanajuato, Inst Fis, Guanajuato 37150, MexicoCastillo-Vallejo, VM, IPN, CINVESTAV, Dept Fis Aplicada, Unidad Merida, AP 73, Merida 97310, Yucatan, Venezuela TI - Lambda(0) polarization as function of target density AB - &ULambda;(0) polarization (P) depends on x(f) and p(t); it depends also on the density of the target material: P(x(f),p(t),ρ) = (κ(0)/λ(0)+ρ/ρω))x(f)p(t), with κ(0) = -0.423&PLUSMN; 0.065 (GeV/c)(-l) and λ(0) = 1.191&PLUSMN; 0.200 in the range 0< p(t)< 1.2 GeV. Here ρ is the target material density and ρ(ω) is the Tungsten density. From this equation, it follows that &ULambda;(0) polarization is reduced by target density MH - Mexico|Guanajuato MH - Venezuela PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 0 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 0217-751X UR - ISI:000229549700003 L2 - Lambda(0) polarization;target density;INCLUSIVE LAMBDA-PRODUCTION; PROTON-PROTON INTERACTIONS; 400-GEV PROTONS; 800-GEV PROTONS; O POLARIZATION; HYPERONS; COLLISIONS; GEV/C; PP; ENERGY SO - International Journal of Modern Physics A 2005 ;20(10):2047-2058 13403 UI - 3348 AU - Castillo-Zamora C AU - Castillo-Peralta LA AU - Nava-Ocampo AA AD - Hosp Infantil Mexico Dr Federico Gomez, Dept Anaesthesia & Resp Therapy, Mexico City 06720, DF, MexicoCtr Nacl Rehabil, Dept Anaesthesia, Mexico City, DF, MexicoHosp Sick Children, Div Clin Pharmacol & Toxicol, Toronto, ON M5G 1X8, CanadaCastillo-Zamora, C, Hosp Infantil Mexico Dr Federico Gomez, Dept Anaesthesia & Resp Therapy, Dr Marquez 162, Mexico City 06720, DF, Mexico TI - Dose minimization study of single-dose epidural morphine in patients undergoing hip surgery under regional anesthesia with bupivacaine AB - Background: In order to decrease the rate of adverse effects, we aimed to identify the lowest analgesic dose of epidural morphine administered to patients undergoing hip surgery. Methods: Forty-five ASA I-II children undergoing surgical correction of hip dysplasia under caudal or epidural anesthesia with bupivacaine were randomized to receive epidural morphine 11.2, 15 or 20 mug.kg(-1) (groups 1, 2 and 3, respectively; 15 patients per group) immediately after completion of surgery. Postoperative pain control, sedation, motor block, urinary retention, pruritus and vomiting were evaluated. Results: In the recovery room, 46.7% of patients from group 1, 33.3% from group 2, and 93.3% from group 3 were sleeping but were easy to arouse (x(2) = 12.2; P < 0.005). The rest of the patients from each respective group were completely asleep. The cardiovascular and respiratory parameters were within normal limits. The ability to move the legs returned approximately 1 h after surgery in all three groups. Seven patients (46.7%) from group 1, nine (60%) from group 2, and 13 patients (86.7%) from group 3 vomited (x(2) = 5.4; P = 0.06). One patient receiving 20 mug.kg(-1) morphine experienced urinary retention. One patient receiving 15 mug.kg(-1) morphine suffered from pruritus. The duration of analgesia was similar, 12-14 h, in all three groups. Conclusions: In patients undergoing hip surgery under regional anesthesia with bupivacaine, epidural morphine at a dose of 11.2 mug.kg(-1) administered immediately after completion of the procedure resulted in adequate pain relief for more than 12 h. Explanation of the high rate of patients vomiting (>45%) remains to be elucidated MH - Canada MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 11 U4 - Anesthesiology;Pediatrics U5 - J;Article AV - English IS - 1155-5645 UR - ISI:000226426000006 L2 - anesthesia;caudal;anesthetics;local;opioid analgesics;postoperative pain;PEDIATRIC CARDIAC-SURGERY; CAUDAL BLOCK; POSTOPERATIVE ANALGESIA; CHILDREN; ML-CENTER-DOT-KG(-1); PHARMACOKINETICS; GLUCURONIDES; CIRCUMCISION; TRIAL; PAIN SO - Pediatric Anesthesia 2005 ;15(1):29-36 13404 UI - 1892 AU - Castro-Acuna CM AU - Kelter PB AU - Canon GP AU - Abraham JM AD - Natl Autonomous Univ Mexico, Dept Fisicoquim, Mexico City 04510, DF, MexicoUniv Illinois, Sch Chem Sci, Urbana, IL 61801, USAUniv Politecn Madrid, Dept Ingn Quim Ind & Medio Ambiente, Madrid, Spain TI - Integrated educational projects: Teaching chemistry within a social context MH - Mexico|Distrito Federal MH - Spain MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000228177702297 SO - Abstracts of Papers of the American Chemical Society 2005 ;229():U381-U381 13405 UI - 2170 AU - Castro-Fernandez C AU - Maya-Nunez G AU - Conn PM AD - Oregon Hlth & Sci Univ, Oregon Natl Primate Res Ctr, Beaverton, OR 97006, USAOregon Hlth & Sci Univ, Dept Physiol & Pharmacol, Beaverton, OR 97006, USAOregon Hlth & Sci Univ, Dept Cell & Dev Biol, Beaverton, OR 97006, USAInst Mexicano Seguro Social, Res Unit Dev Biol, Mexico City 06725, DF, MexicoInst Mexicano Seguro Social, Res Unit Reprod Med, Mexico City 06725, DF, MexicoConn, PM, Oregon Hlth & Sci Univ, Oregon Natl Primate Res Ctr, 505 NW 185th Ave, Beaverton, OR 97006 USA TI - Beyond the signal sequence: Protein routing in health and disease AB - Receptors, hormones, enzymes, ion channels, and structural components of the cell are created by the act of protein synthesis. Synthesis alone is insufficient for proper function, of course; for a cell to operate effectively, its components must be correctly compartmentalized. The mechanism by which proteins maintain the fidelity of localization warrants attention in light of the large number of different molecules that must be routed to distinct subcellular loci, the potential for error, and resultant disease. This review summarizes diseases known to have etiologies based on defective protein folding or failure of the cell's quality control apparatus and presents approaches for therapeutic intervention MH - Mexico|Distrito Federal MH - USA PB - CHEVY CHASE: ENDOCRINE SOC RP - NOT IN FILE U3 - TC 18 U4 - Endocrinology & Metabolism U5 - J;Review AV - English IS - 0163-769X UR - ISI:000229434400001 L2 - ALPHA-B-CRYSTALLIN; CELL-SURFACE EXPRESSION; NEPHROGENIC DIABETES-INSIPIDUS; CREUTZFELDT-JAKOB-DISEASE; DOMINANT RETINITIS-PIGMENTOSA; DENSITY-LIPOPROTEIN RECEPTOR; MEDIATE INCREASED SECRETION; DESMIN-RELATED MYOPATHY; AMYLOID BETA-PROTEIN; ENDOPLASMIC-RETICULUM SO - Endocrine Reviews 2005 ;26(4):479-503 13406 UI - 1222 AU - Castro-Rodriguez R AU - Coronado DR AU - Iribarren A AU - Watts BE AU - Leccabue F AU - Pena JL AD - IPN Merida, CINVESTAV, Appl Phys Dept, Yucatan 97310, MexicoUniv La Habana, IMRE, Havana 10400, CubaIMEM, CNR Inst, I-43010 Parma, ItalyCastro-Rodriguez, R, IPN Merida, CINVESTAV, Appl Phys Dept, Yucatan 97310, Mexico TI - Correlation between target-substrate distance and oxygen pressure in pulsed laser deposition of complex oxide thin films AB - A physico-chemical model is developed to describe a typical pulsed laser deposition (PLD) process. The interaction of atoms in the plume, ejected from the target, with those of the background gas ( e. g. oxygen) is specifically considered. The model gives a physical definition of the 'plume range', which depends on the particular PLD system, and calculates the range. One prediction is that when the target-to-substrate distance (D) is optimised with respect to the oxygen pressure (P), the plasma dynamics plays an important role in growing high-quality complex oxide thin films. Our model predicts a scaling law PD3 = const from thermodynamic data and the experimental volumetric erosion rate of the metallic elements ejected from the target. The volumetric erosion rate was experimentally determined by atomic force microscopy, measuring the dimensions of the crater formed in the target after a number of shots. The model was applied to the growth of three ternary oxides, CdTeO3, AlVO4 and PbFe12O19 thin films, and the scaling laws predicted by our model using 420, 400 and 700 degrees C as substrate temperatures, respectively, were PD3 = ( 3.3086, 5.9827, 30.3) x 10(3) mTorr cm(3), respectively, for the CdTeO3, AlVO4 and PbFe12O19 thin films. In order to grow the thin films, we used an energy density of laser beam of 2 J/ cm(2), and fixed D = 4.0, 4.0 and 3.0 cm from our scaling law; the values of P were 51.7, 130.0 and 751.8 mTorr, respectively. X-ray diffraction shows that the films are polycrystalline and the observed peaks in the samples were similar with respect at its JCPDF patterns respectively MH - Cuba MH - Italy MH - Mexico|Yucatan PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0947-8396 UR - ISI:000231796200031 L2 - EVAPORATION; ABLATION; GROWTH SO - Applied Physics A-Materials Science & Processing 2005 ;81(7):1503-1507 13407 UI - 1377 AU - Castro-Rodriguez R AU - Pena JL AU - Ares O AU - Leccabue F AU - Watts BE AU - Melioli E AD - CINVESTAV, IPN, Dept Appl Phys, Merida 97310, Yuc, MexicoUniv La Habana, Fac Phys, IMRE, Superconduct Lab, Havana 10400, CubaCNR, Ist IMEM, I-43100 Parma, ItalyCastro-Rodriguez, R, CINVESTAV, IPN, Dept Appl Phys, Merida 97310, Yuc, Mexico TI - Nd : YAG pulsed laser deposition of AlVO4 thin films on alumina and monocrystalline MgO AB - AlVO4 thin films were prepared by infrared Nd:YAG pulsed laser deposition on two,different substrates (polycrystalline Al2O3 and monocrystalline MgO). The distance between the target-substrate (30 mm) and the partial oxygen pressure (0.14 mbar) during the deposition process were chosen taking into account the previous experiences with other oxides. The substrate temperature was varied between 300 and 600 degrees C finding an optimum at about 400 degrees C. At higher temperatures, the vanadium seems to evaporate from substrate surface with a strong change of stoichiometry. Preferential growth of AlVO4 films in the direction (022), were grown on MgO substrates. A very high sensitivity of these films to a flux of NO2 gas is also shown. (C) 2005 Elsevier B.V All rights reserved MH - Cuba MH - Italy MH - Mexico|Yucatan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0167-577X UR - ISI:000231365800012 L2 - TARGET-SUBSTRATE DISTANCE; MIXED OXIDES; GAS SENSORS; RANGE SO - Materials Letters 2005 ;59(24-25):3027-3032 13408 UI - 1546 AU - Castro-Rodriguez R AU - Pena JL AU - Leccabue F AU - Watts BE AU - Melioli E AD - IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, MexicoCNR, Ist IMEM, Area Sci 37A, I-43010 Loc Fontanini, Parma, ItalyCastro-Rodriguez, R, IPN, CINVESTAV, Dept Appl Phys, Merida 97310, Yucatan, Mexico TI - Conducting In-doped CdTe oxide thin films grown by pulsed-laser deposition AB - Conducting transparent oxide semiconductor In-doped CdTe oxide (ICTO) thin films (similar to 200 nm thick) have been deposited by pulsed-laser deposition on glass substrates without a postdeposition anneal. The electrical, structural, and optical properties of these films have been investigated as a function of O-2 partial pressures during the deposition. Films were deposited at substrate temperature of 420 degrees C in oxygen partial pressures between 15 and 55 mTorr. The resistivity is very sensitive to the oxygen deposition pressure; at 28.5 mTorr the films show electrical resistivities as low as 9.4x10(-3) Omega cm, an average visible transmittance of similar to 75.5%, and an optical band gap of 2.74 eV. (c) 2005 American Institute of Physics MH - Italy MH - Mexico|Yucatan PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0003-6951 UR - ISI:000231016900030 L2 - LIGHT-EMITTING DEVICES; TEMPERATURE; RESISTIVITY; ZNO SO - Applied Physics Letters 2005 ;87(6): 13409 UI - 1895 AU - Castro-Rodriguez R AU - Iribarren A AU - Bartolo-Perez P AU - Pena JL AD - Univ La Habana, Inst Mat & React, IMRE, Havana 10400, CubaIPN, CINVESTAV, Dept Appl Phys, Yucatan 97310, MexicoIribarren, A, Univ La Habana, Inst Mat & React, IMRE, Havana 10400, Cuba TI - Obtaining of polycrystalline CdTeO3 by reactive pulse laser deposition AB - We report the obtaining of as-grown polycrystalline CdTeO3 thin films grown by the reactive pulsed laser deposition technique in a controlled atmosphere of pure oxygen. X-ray diffraction (XRD) shows no CdTe presence and peaks, corresponding to single-phase of face-centred cubic of polycrystalline CdTeO3, are well-defined, with a calculated gain size of about 120 nm and a compressive strain of 0.083%. X-ray photoelectron spectroscopy (XPS) shows 11% of CdTe and 89% of CdTeO3. This CdTe, which was not present in XRD measurements, was related with Te reduction in the surface during the XPS measurement. Atomic force microscopy shows a mainly smooth surface with spheroid-like grains. (c) 2005 Elsevier B.V. All rights reserved MH - Cuba MH - Mexico|Yucatan PB - LAUSANNE: ELSEVIER SCIENCE SA RP - NOT IN FILE U3 - TC 5 U4 - Materials Science, Multidisciplinary;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter U5 - J;Article AV - English IS - 0040-6090 UR - ISI:000230045900016 L2 - laser ablation;cadmium telluride;oxides;THIN-FILMS; OXIDE-FILMS; ABLATION; MIXTURE; PLASMA SO - Thin Solid Films 2005 ;484(1-2):100-103 13410 UI - 615 AU - Castro-Roman F AU - Porcar L AU - Porte G AU - Ligoure C AD - Univ Montpellier 2, Lab Colloides Verres & Nanomat, UMR 5587, UM2,CNRS, F-34095 Montpellier, FranceNIST, Ctr Neutron Res, Gaithersburg, MD 20899, USAUniv Maryland, College Pk, MD 20742, USAUniv Calif Irvine, Dept Physiol & Biophys, Irvine, CA 92697, USAUniv Sonora, Dept Fis, Hermosillo 83000, Sonora, MexicoCastro-Roman, F, Univ Montpellier 2, Lab Colloides Verres & Nanomat, UMR 5587, UM2,CNRS, CC26, F-34095 Montpellier, France TI - Quantitative analysis of lyotropic lamellar phases SANS patterns in powder oriented samples AB - We have developed a detailed numerical method based on the Caille model to fit Small Angle Neutron Scattering profiles of powder-oriented lyotropic lamellar phases. We thus obtain quantitative values for the Caille parameter and the smectic penetration length from which we can derive the smectic compression modulus and the membrane mean bending modulus. Our method, applied to a surfactant lamellar phase system decorated by amphiphilic copolymers, provides excellent fits for any intermembrane spacing or membrane concentration over the entire q-range of the SANS experiments. We compare our fits with those obtained from the model of Nallet et al. (J. Phys. II 3, 487 (1993)), which is reviewed. Good fits are obtained with both methods for samples exhibiting "hard" smectic order (sharp Bragg peak, moderate small angle scattering). Only our procedure, however, gives good fits in the case of "soft" smectic order (smooth Bragg peak, strong small angle scattering). A quantitative criterion to discriminate between these "soft" and "hard" samples is also proposed, based on a simple analogy with smectic-A liquid crystal in contact with an undulating solid surface. This allows us to anticipate the type of thermodynamic information that can be derived from the fits MH - France MH - Mexico|Sonora MH - USA PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Materials Science, Multidisciplinary;Physics, Applied;Polymer Science U5 - J;Article AV - English IS - 1292-8941 UR - ISI:000233363300003 L2 - ANGLE NEUTRON-SCATTERING; X-RAY-SCATTERING; FLUID MEMBRANES; LIPID-BILAYERS; NONADSORBING-POLYMER; LIQUID-CRYSTALS; FLUCTUATIONS; COPOLYMERS; LIPOSOMES; SWOLLEN SO - European Physical Journal e 2005 ;18(3):259-272 13411 UI - 3432 AU - Castro-Villarreal P AU - gadillo-Blando R AU - Ydri B AD - Dublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, IrelandInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoCastro-Villarreal, P, Dublin Inst Adv Studies, Sch Theoret Phys, 10 Burlington Rd, Dublin 4, Ireland TI - A gauge invariant UV-IR mixing and the corresponding phase transition for U(1) fields on the fuzzy sphere AB - From a string theory point of view the most natural gauge action on the fuzzy sphere S-L(2) is the Alekseev-Recknagel-Schomerus action which is a particular combination of the Yang-Mills action and the Chern-Simons-like term. The differential calculus on the fuzzy sphere is 3-dimensional and thus the field content of this model consists of a 2-dimensional gauge field together with a scalar fluctuation normal to the sphere. For U(1) gauge theory we compute the quadratic effective action and shows explicitly that the tadpole diagrams and the vacuum polarization tensor contain a gauge-invariant UV-IR mixing in the continuum limit L --> infinity where L is the matrix size of the fuzzy sphere. In other words the quantum U(1) effective action does not vanish in the commutative limit and a noncommutative anomaly survives. We compute the scalar effective potential and prove the,gauge-fixing-independence of the limiting model L = infinity and then show explicitly that the one-loop result predicts a first order phase transition which was observed recently in simulation. The one-loop result for the U(1) theory is exact in this limit. It is also argued that if we add a lame mass term for the scalar mode the UV-IR mixing will be completely removed. It is found in this case to be confined to the scalar sector only. This is in accordance with the large L analysis of the model. Finally we show that the phase transition becomes harder to reach starting from small couplings when we increase M. (C) 2004 Elsevier B.V. All rights reserved MH - Ireland MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 16 U4 - Physics, Particles & Fields U5 - J;Article AV - English IS - 0550-3213 UR - ISI:000226217700004 L2 - NONCOMMUTATIVE GEOMETRY; STAR-PRODUCTS; SCALAR FIELD; SPACES; HARMONICS; MONOPOLE; PHYSICS; ORIGIN; MODEL; S-2 SO - Nuclear Physics B 2005 ;704(1-2):111-153 13412 UI - 946 AU - Castro CE AU - Rios MC AU - Lilly B AU - Castro JM AD - Ohio State Univ, Dept Ind Welding & Syst Engn, Columbis, OH 43202, USAUniv Auton Nuevo Leon, Grad Program Syst Engn, San Nicolas de los Garza 66450, Nuevo Leon, MexicoCastro, CE, Ohio State Univ, Dept Ind Welding & Syst Engn, Columbis, OH 43202 USA TI - Simultaneous optimization of mold design and processing conditions in injection molding AB - Injection molding (IM) is considered the foremost process for mass-producing plastic products. One of the biggest challenges facing injection molders today is to determine the proper settings for the IM process variables. Selecting the proper settings for an IM process is crucial because the behavior of the polymeric material during shaping is highly influenced by the process variables. Consequently, the process variables govern the quality of the part produced. The difficulty of optimizing an IM process is that the performance measures (PMs), such as surface quality or cycle time, that characterize the adequacy of part, process, or machine to intended purposes, usually show conflicting behavior. Therefore, a compromise must be found between all of the PMs of interest. In the past, we have shown a method comprised of Computer Aided Engineering, Artificial Neural Networks, and Data Envelopment Analysis (DEA) that can be used to find the best compromises between several performance measures.. The analyses presented in this paper are geared to make informed decisions on the compromises of several performance measures. These analyses also allow for the identification of robust variable settings that might help to define a starting point for negotiation between multiple decision makers. Future work will include adding information about the variability of PMs on the DEA analysis and the determination of process windows with efficiency considerations. This paper discusses the application of this method to IM and how to exploit the results to determine robust process and design settings MH - USA MH - Mexico|Nuevo Leon PB - TEL AVIV: FREUND PUBLISHING HOUSE LTD RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0334-6447 UR - ISI:000232581500001 SO - Journal of Polymer Engineering 2005 ;25(6):459-485 13413 UI - 128 AU - Castro MJ AU - Diaz W AU - Ferri FJ AU - Ruiz-Pinales J AU - Jaime-Rivas R AU - Blat F AU - Espana S AU - Aibar P AU - Grau S AU - Griol D AD - Univ Politecn Valencia, Dep Sistemas Informat & Computac, Valencia, SpainUniv Valencia, Dept Informat, Valencia, SpainUniv Guanajuato, FIMEE, Guanajuato, MexicoUniv Jaume 1, Dept Lenguajes & Sistemas Informat, Castellon de La Plana, SpainCastro, MJ, Univ Politecn Valencia, Dep Sistemas Informat & Computac, Valencia, Spain TI - A holistic classification system for check amounts based on neural networks with rejection AB - A holistic classification system for off-line recognition of legal amounts in checks is described in this paper. The binary images obtained from the cursive words are processed following the human visual system, employing a Hough transform method to extract perceptual features. Images are finally coded into a bidimensional feature map representation. Multilayer perpeptrons are used to classify these feature maps into one of the 32 classes belonging to the CENPARMI database. To select a final classification system, ROC graphs are used to fix the best threshold values of the classifiers to obtain the best tradeoff between accuracy and misclassification MH - Mexico|Guanajuato MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 0 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000234856700045 L2 - RECOGNITION SO - Pattern Recognition and Machine Intelligence, Proceedings 2005 ;3776():310-314 13414 UI - 1181 AU - Catala S AU - Sachetto C AU - Moreno M AU - Rosales R AU - Salazar-Schettino PM AU - Gorla D AD - CRILAR, Anillaco La Rioja, ArgentinaUNAM, Dept Microbiol & Parasitol, Mexico City, DF, MexicoUniv San Carlos, Escuela Biol, Lab Entomol Aplicad & Parasitol, Guatemala City, GuatemalaCatala, S, CRILAR, Anillaco La Rioja, Argentina TI - Antennal phenotype of Triatoma dimidiata populations and its relationship with species of phyllosoma and protracta complexes AB - Triatoma dimidiata (Latreille 1811) Reduviidae Triatominae is the main vector of Chagas disease in several countries of Latin America. As for other vector species, the characterization of T dimidiata subpopulations within particular geographical regions or occupying different habitats could help in better planning of vector control actions. A first objective in this study was to evaluate the antennal phenotype as a phenetic marker to characterize populations of T dimidiata collected in different geographic areas and domestic and sylvatic habitats. A second objective was to evaluate the phenetic relationships of T. dimidiata with other species of the phyllosoma complex: longipennis, pallidipennis, and phyllosoma. The antennal sensilla of T. dimidiata specimens collected in Mexico, Central America, and Colombia were analyzed and compared with the antennal sensilla of T. longipennis, T pallidipennis, and T phyllosoma. T. barberi was used as an outgroup in the analysis. For each specimen, the ventral side of the three distal segments of the antennae was drawn, identifying and counting four types of sensilla. In T dimidiata, univariate and multivariate analysis showed differences between sexes, among populations collected in different habitats within the same region, and among populations collected in different geographic regions. Two types of antennal sensilla showed a latitudinal variation. Domestic specimens showed intermediate characteristics of the antennal phenotype, between sylvatic cave- and sylvatic forest-collected specimens. The antennal phenotypes show high similarities among T. pallidipennis, T. phyllosoma, and T longipennis, with a better differentiation of T pallidipennis. T dimidiata is separated from the other members of the complex by a similar distance to T barberi, of the protracta complex MH - Argentina MH - Guatemala MH - Mexico|Distrito Federal PB - LANHAM: ENTOMOL SOC AMER RP - NOT IN FILE U3 - TC 4 U4 - Entomology;Veterinary Sciences U5 - J;Article AV - English IS - 0022-2585 UR - ISI:000231846500001 L2 - antennal sensilla;phyllosoma group;Triatoma dimidiata;Triatominae;Chagas disease;REDUVIIDAE POPULATIONS; RHODNIUS-PROLIXUS; SENSILLA PATTERNS; CHAGAS-DISEASE; HEMIPTERA; VARIABILITY; INFESTANS SO - Journal of Medical Entomology 2005 ;42(5):719-725 13415 UI - 1631 AU - Caudillo R AU - Troiani HE AU - Miki-Yoshida M AU - Marques MAL AU - Rubio A AU - Yacaman MJ AD - Univ Texas, Texas Mat Inst, Austin, TX 78712, USACtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCNEA, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaUNC, RA-8400 San Carlos De Bariloche, Rio Negro, ArgentinaCtr Invest & Mat Avanzados, Chih 31109, MexicoUniv Pais Vasco, Ctr Mixto, CSIC UPV, Fac Quim,Dpto Fis Mat, San Sebastian, SpainDonostia Int Phys Ctr, San Sebastian, SpainUniv Texas, Dept Chem Engn, Austin, TX 78712, USACaudillo, R, Univ Texas, Texas Mat Inst, Austin, TX 78712, USA TI - A viable way to tailor carbon nanomaterials by irradiation-induced transformations AB - Since the discovery of carbon nanotubes (CNT), transmission electron microscopy (TEM) has been the most important tool in their investigation. It is possible to use electron irradiation in a TEM to construct a single-walled carbon nanotube (SWCNT) from an amorphous carbon film. Here we show that such a synthesis method creates a large number of carbon ad-atoms, which after some critical amount of radiation act to restore the system by reconstructing the carbon film. The behavior of the ad-atoms can be controlled by adjusting the current density in the microscope, suggesting that carbon nanomaterials can be tailored by electron irradiation. (c) 2004 Elsevier Ltd. All rights reserved MH - Argentina MH - Mexico|Chihuahua MH - Spain MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Physical;Nuclear Science & Technology;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 0969-806X UR - ISI:000230741900004 L2 - carbon nanotubes;electron irradiation;nanomaterials;transmission electron microscopy;NANOTUBES SO - Radiation Physics and Chemistry 2005 ;73(6):334-339 13416 UI - 708 AU - Cauich E AU - Cardenas RG AU - Watanabe R AD - Univ Calif Irvine, Irvine, CA 92717, USA. ITESM, CEM, Dept Ciencias Computac, Atizapan de Zaragoza 51296, Mexico, Mexico TI - Data hiding in identification and offset IP fields AB - Steganography is defined as the art and science of hiding information, it takes one piece of information and hides it within another. The piece more used to hide information are the digital images. In this paper we present a way to use unused fields in the IP header of TCP/IP packets in order to send information between to nodes over Internet MH - Mexico|Distrito Federal MH - USA T3 - ADVANCED DISTRIBUTED SYSTEMSLecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticleecauichz@ics.uci.edu rogomez@itesm.mx A00445577@itesm.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBDD66 AV - English IS - 0302-9743 UR - ISI:000232951100011 SO - 2005 ;():118-125 13417 UI - 139 AU - Cavazos A AU - Edwards JB AD - Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas de los Garza 66451, Nuevo Leon, MexicoUniv Sheffield, Dept Automat Control & Syst Engn, Sheffield S1 3JD, S Yorkshire, EnglandCavazos, A, Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, Pedro de Alba S-N Cd Univ, San Nicolas de los Garza 66451, Nuevo Leon, Mexico TI - Multivariable H-infinity force/level control of the twin-roller strip caster MH - United Kingdom MH - Mexico|Nuevo Leon PB - DHAHRAN: KING FAHD UNIV PETROLEUM MINERALS RP - NOT IN FILE U3 - TC 0 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 1319-8025 UR - ISI:000235056500006 L2 - strip casting;twin-roller;multivariable control;time delay;H-infinity-optimal control;interactions;decoupling control;ADAPTIVE FUZZY CONTROL; MOLTEN STEEL LEVEL; CASTING PROCESS; THIN STRIP SO - Arabian Journal for Science and Engineering 2005 ;30(1C):57-82 13418 UI - 2000 AU - Cazares-Delgadillo J AU - Naik A AU - Kalia YN AU - Quintanar-Guerrero D AU - Ganem-Quintanar A AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Div Estudios Posgrado Tecnol Farmaceut, Mexico City 54750, DF, MexicoCtr Interuniv Rech & Enseignement, F-74160 Archamps, FranceGanem-Quintanar, A, Univ Nacl Autonoma Mexico, Fac Estudios Super Cuautitlan, Div Estudios Posgrado Tecnol Farmaceut, Av 1 Mayo S-N, Mexico City 54750, DF, Mexico TI - Skin permeation enhancement by sucrose esters: A pH-dependent phenomenon AB - The purpose of the present study was to evaluate the effect of sucrose esters (particularly, sucrose laureate and sucrose oleate in Transcutol (R)) on the percutaneous penetration of a charged molecule as a function of ionization. We have investigated the influence of these sucrose esters on the in vitro diffusion profiles of lidocaine hydrochloride, a weak ionizable base (pK(a) = 7.9), at different pH values, using porcine ear skin as the barrier membrane. As expected, lidocaine flux in the absence of an enhancer, increased from pH 5 to 9 with a con-responding increase in the level of the unionized base. However, when skin was pretreated with 2% laureate in Transcutol (2% L-TC), drug permeation was higher at pH 5.0 and 7.0 than at 9.0. A different trend was observed in experiments with 2% oleate in Transcutol (2% O-TC), where skin flux was maximal at a more basic pH, when the degree of ionization is low. The results suggest that sucrose laureate enhances the penetration of the ionized form of the drug (12-fold greater flux relative to control), whereas sucrose oleate is more effective in promoting permeation of the unionized species. The structural properties of the sucrose esters as well as the degree of ionization of the drug are important characteristics affecting the transdermal flux of lidocaine. (c) 2005 Elsevier B.V. All rights reserved MH - France MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-5173 UR - ISI:000229766400022 L2 - lidocaine hydrochloride;sucrose esters;enhancer;percutaneous absorption;HUMAN STRATUM-CORNEUM; PERCUTANEOUS-ABSORPTION; PENETRATION ENHANCEMENT; IN-VITRO; TRANSDERMAL DELIVERY; OLEIC-ACID; INVITRO; VIVO; PERMEABILITY; LIDOCAINE SO - International Journal of Pharmaceutics 2005 ;297(1-2):204-212 13419 UI - 1703 AU - Ceballos G AU - Ehrlich PR AU - Soberon J AU - Salazar I AU - Fay JP AD - Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, MexicoStanford Univ, Dept Biol Sci, Ctr Conservat Biol, Stanford, CA 94305, USAComis Nacl Biodivers, Mexico City, DF, MexicoCeballos, G, Univ Nacl Autonoma Mexico, Inst Ecol, Apdo Postal 70-275, Mexico City 04510, DF, Mexico TI - Global mammal conservation: What must we manage? AB - We present a global conservation analysis for an entire "flagship" taxon, [and mammals. A combination of rarity, anthropogenic impacts, and political endemism has put about a quarter of terrestrial mammal species, and a larger fraction of their populations, at risk of extinction. A new global database and complementarity analysis for selecting priority areas for conservation shows that similar to 11% of Earth's land surface should be managed for conservation to preserve at least 10% of terrestrial mammal geographic ranges. Different approaches, from protection (or establishment) of reserves to countryside biogeographic enhancement of human-dominated landscapes, will be required to approach this minimal goal MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE RP - NOT IN FILE U3 - TC 24 U4 - Multidisciplinary Sciences U5 - J;Article AV - English IS - 0036-8075 UR - ISI:000230735200046 L2 - BIODIVERSITY HOTSPOTS; POPULATION DIVERSITY; EXTINCTION SO - Science 2005 ;309(5734):603-607 13420 UI - 338 AU - Ceballos L AU - Henaut Y AU - Legal L AD - ECOSUR, Tapachula, Chiapas, MexicoUniv Toulouse 3, CNRS, LADYBIO, F-31062 Toulouse, FranceHenaut, Y, ECOSUR, AP 36, Tapachula, Chiapas, Mexico TI - Foraging strategies of Eriophora edax (Araneae, Araneidae): A nocturnal orb-weaving spider AB - Studies on the ecology of orb spiders have focused on diurnal spiders, especially field studies. Nocturnal spiders, however, face different conditions due to the type of prey found at night. A field Study was conducted to observe the activity of adult females of Eriophora edax in their natural environment, and to analyze their predation efficiency and web retention properties. Most of the spiders were observed around Sunset, Which Suggests that E. edax tends to build webs in the early evening. In order to evaluate the predation efficiency of E. edax we compared its behavior and web retention properties with the behavior of a diurnal orb-weaving spider, Verrucosa arenata. Two prey types, a diurnal Hymenoptera and a nocturnal Lepidoptera, were selected and presented to the spiders, to record approach time and prey Capture time. The results Showed that E. edax spent more time to capture Hymenoptera than to capture Lepidoptera. During the experiments of web prey retention time, Hymenoptera consistently showed greater tumbling than Lepidoptera, but the total retention time was the same for both prey types. Our results showed that E. edax forages strictly at night and, in terms of prey capture and web retention, was more efficient when preying oil Lepidoptera MH - France MH - Mexico|Chiapas PB - NEW YORK: AMER ARACHNOLOGICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 0161-8202 UR - ISI:000234013200033 L2 - Eriophora edax;web-building spider;nocturnal activity;prey selection;COFFEE PLANTATIONS; WEB; PREY; BEHAVIOR; ARANEOIDEA; MEXICO; FIELD; FOOD SO - Journal of Arachnology 2005 ;33(2):509-515 13421 UI - 1741 AU - Cedeno AJ AU - Vazquez-Torres H AD - Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Area Polimeros, Mexico City 09340, DF, MexicoUniv Oriente, Dept Fis, Lab Polimeros Nucleo Sucre, Sucre 6101, VenezuelaVazquez-Torres, H, Univ Autonoma Metropolitana Iztapalapa, Dept Fis, Area Polimeros, Av San Rafael Atlixco 186, Mexico City 09340, DF, Mexico TI - Kinetic study of the effect of poly(phenyl sulfone) on the curing of an epoxy/amine resin by conventional and by temperature-modulated differential scanning calorimetry AB - Kinetic studies of the curing reaction of semi-interpenetrating polymer networks (semi-IPNs) based on diglycidyl ether of bisphenol-A (DGEBA) and 4,4'-diaminodiphenylmethane (DDM), containing poly(phenyl sulfone) (PPSU), were carried out using differential scanning calorimetry (DSC) and temperature-modulated DSC (TMDSC), under both isothermal and dynamic conditions. The curing kinetics is discussed in the framework of three kinetic models: the Kissinger and the Flynn-Wall-Ozawa models, and the autocatalytic model developed by Kamal. To describe the cured reaction in its latter stage, we used the semi-empirical relationship proposed by Chern and Poehlein to consider the influence of diffusion on reaction rate. The cure mechanism for the system studied remained broadly autocatalytic regardless of PPSU content, and it became far more diffusion controlled at higher PPSU content and lower cure temperatures. The vitrification time of the resins was obtained with TMDSC by following the changes on the complex modulus of heat capacity, vertical bar C-p*vertical bar, and exhibited a strong dependence on the PPSU content in the semi-IPN systems. (c) 2005 Society of Chemical Industry MH - Mexico|Distrito Federal MH - Venezuela PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 3 U4 - Polymer Science U5 - J;Article AV - English IS - 0959-8103 UR - ISI:000230495200006 L2 - kinetics;poly(phenyl sulfone);autocatalytic;diffusion;vitrification time;EPOXY/CYCLOALIPHATIC AMINE RESIN; MODIFIED EPOXY-RESINS; CURE KINETICS; MECHANICAL-PROPERTIES; DSC MEASUREMENTS; HEAT-CAPACITY; SYSTEM; PHASE; NETWORKS; BEHAVIOR SO - Polymer International 2005 ;54(8):1141-1152 13422 UI - 809 AU - Celardo GL AU - Pineda C AU - Znidaric M AD - Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, ItalyUniv Nacl Autonoma Mexico, Mexico City 01000, DF, MexicoUniv Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana, SloveniaCelardo, GL, Univ Cattolica, Dipartimento Matemat & Fis, Via Musei 41, I-25121 Brescia, Italy TI - Stability of the quantum Fourier transformation on the Ising quantum computer AB - We analyze the influence of errors on the implementation of the quantum Fourier transformation. Two kinds of errors are studied: (i) systematic errors due to off-resonant transitions and (ii) errors due to an external perturbation. The scaling of errors with system parameters and the number of qubits is analyzed. To suppress off-resonant transitions, we use correcting pulses while in order to suppress errors due to an external perturbation, we use an improved quantum Fourier transformation algorithm. As a result, the fidelity of quantum computation is increased by several orders of magnitude and is thus stable in a much wider range of physical parameters MH - Italy MH - Mexico|Distrito Federal MH - Slovenia PB - SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD RP - NOT IN FILE U3 - TC 4 U4 - Computer Science, Theory & Methods;Physics, Particles & Fields;Physics, Mathematical U5 - J;Article AV - English IS - 0219-7499 UR - ISI:000232866900001 L2 - Ising;quantum computation;quantum Fourier transform;decoherence;fidelity;INFORMATION; COMPUTATION; QUBITS; DECAY SO - International Journal of Quantum Information 2005 ;3(3):441-462 13423 UI - 3435 AU - Cepeda-Nieto AC AU - Pfaff SL AU - Varela-Echavarria A AD - Salk Inst Biol Studies, La Jolla, CA 92037, USAUNAM, Inst Neurobiol, Queretaro 76230, MexicoVarela-Echavarria, A, UNAM, Inst Neurobiol, Campus UNAM UAQ Juriquilla,Apdo Postal 1-1141, Queretaro 76001, Mexico TI - Homeodomain transcription factors in the development of subsets of hindbrain reticulospinal neurons AB - Hindbrain reticulospinal neurons are involved in complex neural functions that are mediated by spinal elements, including posture control and modulation of respiration and cardiovascular function. Recent descriptive studies with chick, mouse, and rat embryos have provided anatomical insight into the development of the different reticulospinal nuclei and the establishment of their axonal projection pathways into the spinal cord. In this study, we have addressed the molecular control of this process. Retrograde labeling of reticulospinal neurons in chick and mouse embryos combined with immunostaining for the homeodomain factors Lhx1/Lhx5, Lhx3/Lhx4, and Chx10 have defined transcriptional codes that label subsets of neurons with different axon projection patterns. Gain of function and loss of function experiments using in ovo electroporation implicate these transcription factors in the determination of reticulospinal neuron identity. Furthermore, our studies reveal novel gene interactions between the transcription factors analyzed that may determine the final patterns of reticulospinal axon projection. (C) 2004 Elsevier Inc. All rights reserved MH - Mexico|Queretaro MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 6 U4 - Neurosciences U5 - J;Article AV - English IS - 1044-7431 UR - ISI:000226381400003 L2 - LIM HOMEOBOX GENES; MOTOR-NEURON; PATHWAY SELECTION; SUBTYPE IDENTITY; CHICKEN-EMBRYO; SPINAL-CORD; BRAIN-STEM; SPECIFICATION; PROTEIN; EXPRESSION SO - Molecular and Cellular Neuroscience 2005 ;28(1):30-41 13424 UI - 2254 AU - Cepeda C AU - Andre VM AU - Flores-Hernandez J AU - Nguyen OK AU - Wu N AU - Klapstein GJ AU - Nguyen S AU - Koh S AU - Vinters HV AU - Levine MS AU - Mathern GW AD - Univ Calif Los Angeles, Div Neurosurg, Los Angeles, CA, USAUniv Calif Los Angeles, Div Pediat Neurol, Los Angeles, CA, USAUniv Calif Los Angeles, Div Neuropathol, Dept Neurol, Brain Res Inst, Los Angeles, CA, USAUniv Calif Los Angeles, Mental Retardat Res Ctr, David Geffen Sch Med, Los Angeles, CA, USABenemerita Univ Autonoma Puebla, Inst Physiol, Puebla, MexicoMathern, GW, Reed Neurol Res Ctr, 710 Westwood Plaza,Room 2123, Los Angeles, CA 90095 USA TI - Pediatric cortical dysplasia: Correlations between neuroimaging, electrophysiology and location of cytomegalic neurons and balloon cells and glutamate/GABA synaptic circuits AB - Seizures in cortical dysplasia (CD) could be from cytomegalic neurons and balloon cells acting as epileptic 'pacemakers', or abnormal neurotransmission. This study examined these hypotheses using in vitro electrophysiological techniques to determine intrinsic membrane properties and spontaneous glutamatergic and GABAergic synaptic activity for normal-pyramidal neurons, cytomegalic neurons and balloon cells from 67 neocortical sites originating from 43 CD patients (ages 0.2 - 14 years). Magnetic resonance imaging (MRI), (18)fluoro-2-deoxyglucose positron emission tomography (FDG-PET) and electrocorticography graded cortical sample sites from least to worst CD abnormality. Results found that cytomegalic neurons and balloon cells were observed more frequently in areas of severe CD compared with mild or normal CD regions as assessed by FDG-PET/MRI. Cytomegalic neurons (but not balloon cells) correlated with the worst electrocorticography scores. Electrophysiological recordings demonstrated that cytomegalic and normal-pyramidal neurons displayed similar firing properties without intrinsic bursting. By contrast, balloon cells were electrically silent. Normal-pyramidal and cytomegalic neurons displayed decreased spontaneous glutamatergic synaptic activity in areas of severe FDG-PET/MRI abnormalities compared with normal regions, while GABAergic activity was unaltered. In CD, these findings indicate that cytomegalic neurons (but not balloon cells) might contribute to epileptogenesis, but are not likely to be 'pacemaker' cells capable of spontaneous paroxysmal depolarizations. Furthermore, there was more GABA relative to glutamate synaptic neurotransmission in areas of severe CD. Thus, in CD tissue alternate mechanisms of epileptogenesis should be considered, and we suggest that GABAergic synaptic circuits interacting with cytomegalic and normal-pyramidal neurons with immature receptor properties might contribute to seizure generation. Copyright © 2005 S. Karger AG, Basel MH - USA MH - Mexico|Puebla PB - BASEL: KARGER RP - NOT IN FILE U3 - TC 21 U4 - Neurosciences U5 - J;Article AV - English IS - 0378-5866 UR - ISI:000229034800007 L2 - cortical dysplasia;electrophysiology;cytomegalic neurons;balloon cells;EPILEPSY SURGERY PATIENTS; MAINTAINED IN-VITRO; INTRINSIC EPILEPTOGENICITY; DIFFERENTIAL EXPRESSION; NEOCORTICAL NEURONS; CORTEX; MALFORMATIONS; CHILDREN; FEATURES; TISSUE SO - Developmental Neuroscience 2005 ;27(1):59-76 13425 UI - 2107 AU - Cerda-Garcia-Rojas CM AU - Coronel AD AU - de Lampasona MEP AU - Catalan CAN AU - Joseph-Nathan P AD - Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Mexico City 07000, DF, MexicoUniv Nacl Tucuman, Inst Quim Organ, Fac Bioquim Quim & Farm, RA-4000 San Miguel De Tucuman, ArgentinaCerda-Garcia-Rojas, CM, Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Quim, Apartado 14-740, Mexico City 07000, DF, Mexico TI - Absolute configuration of lippifoliane and africanane derivatives AB - The absolute configuration of naturally occurring lippifoliane derivatives isolated from the widely used plant Lippia integrifolia was assigned by analysis of the circular dichroism data in combination with density functional theory minimum energy molecular models of (1S,4R,6S,9S,10R)-lippifolian-l-ol-5-one (1), (4R,9S,10R)-lippifoli-1(6)-en-5-one (2), and (4S,9S,10R)-lippifoli-1(6)-en-4-ol-5-one (3) and application of the octant rule for saturated ketone 1 and the helicity rules for α,/β-unsaturated ketones 2 and 3. The results were reinforced by the anomalous dispersion effect observed in the X-ray diffraction analysis of (4S,9S,10R)-4,10,11-tribromo-10,11-seco-lippifoli-1(6)-en-5-one (4) prepared from 2. The biogenetic relationships between lippifolianes 1-3 and africanane derivatives 7-9 and 13 isolated from the same species, together with chiroptical data for africananes isolated from the Hepaticae family, complete a stereochemical scenario in relation to the absolute configuration of africananes from L. integrifolia MH - Argentina MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 7 U4 - Plant Sciences;Chemistry, Applied;Chemistry, Medicinal;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0163-3864 UR - ISI:000229596900004 L2 - MOLECULAR-FORCE FIELD; OPTICAL-ROTATORY DISPERSION; LIPPIA-INTEGRIFOLIA; CIRCULAR-DICHROISM; NATURAL-PRODUCTS; MMFF94; CONSTITUENTS; PARAMETERS; STEREOCHEMISTRY; PERFORMANCE SO - Journal of Natural Products 2005 ;68(5):659-665 13426 UI - 1026 AU - Cerda-Mendez EA AU - Balderas-Navarro RE AU - Lastras-Martinez A AU - Lastras-Martinez LF AU - Garnache A AU - Cerutti L AU - Jouille A AD - Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, MexicoUniv Montpellier 2, UMR 5507, Ctr Elect & Microoptoelect 2, CNRS, F-34095 Montpellier, FranceUniv Autonoma San Luis Potosi, Fac Ciencias, San Luis Potosi 78000, MexicoCerda-Mendez, EA, Univ Autonoma San Luis Potosi, Inst Invest Comunicac Opt, San Luis Potosi 78000, Mexico TI - Interfaces in GaxIn1-xAsySb1-y/AlxGa1-xAsySb1-y multi-quantum-well heterostructures probed by transmittance anisotropy spectroscopy AB - We have used transmission anisotropy (TA) and photoreflectance-difference (PRD) spectroscopies as tools for the characterization of heterostructures consisting of 100 A GaxIn1-xAsySb1-y quantum wells with 200 A AlxGa1-xAsySb1-y barriers. Exctions associated to two allowed and two forbidden transitions of the confined levels in the quantum wells (QWs) are detected with PRD at 15 K. Using TA spectroscopy they all can be clearly resolved at room temperature. The signal of the anisotropy is proved experimentally to stem exclusively from the QWs and the surrounding interfaces. We show TA spectroscopy to be a powerful tool for interface characterization in heterostructures with energy gap below that of the substrate. (c) 2005 American Institute of Physics MH - France MH - Mexico|San Luis Potosi PB - MELVILLE: AMER INST PHYSICS RP - NOT IN FILE U3 - TC 0 U4 - Physics, Applied U5 - J;Article AV - English IS - 0021-8979 UR - ISI:000232226000095 L2 - REFLECTANCE; LASER SO - Journal of Applied Physics 2005 ;98(6): 13427 UI - 2528 AU - Cerdeira A AU - Aleman MA AU - Pavanello MA AU - Martino JA AU - Vancaillie L AU - Flandre D AD - CINVESTAV, IPN, SSES, Dept Elect Engn, Mexico City 07300, DF, MexicoCtr Univ FEI, Dept Elect Engn, BR-09850901 Sao Bernardo do Campo, BrazilUniv Sao Paulo, Lab Sistemas Integraveis, BR-05508900 Sao Paulo, BrazilUniv Catholique Louvain, Microelect Lab, B-1348 Louvain, BelgiumCerdeira, A, CINVESTAV, IPN, SSES, Dept Elect Engn, Mexico City 07300, DF, Mexico TI - Advantages of the graded-channel SOIFD MOSFET for application as a quasi-linear resistor AB - In this paper, we analyze the previously unexpected advantages of asymmetric channel engineering on the MOS resistance behavior in quasi-linear operation, such as used in integrated continuous-time tunable filters. The study of the two major figures of merit in such applications as on-resistance and nonlinear harmonic distortion, is supported by both measurements and simulations of conventional and graded-channel (GC) fully depleted silicon-on-insultor (SOI) MOSFETs. The quasi-linear current-voltage characteristics of GC transistors show a decrease of the on-resistance as the length of the low doped region in the channel is increased, as well as an improvement in the third-order harmonic distortion (HD3), when compared with conventional transistors. A method for full comparison between conventional and GC SOI MOSFETs is presented, considering HD3 evolution with on-resistance tuning under low voltage of operation. Results demonstrate the significant advantages provided by the asymmetrical long channel transistors MH - Belgium MH - Brazil MH - Mexico|Distrito Federal PB - PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC RP - NOT IN FILE U3 - TC 4 U4 - Engineering, Electrical & Electronic;Physics, Applied U5 - J;Article AV - English IS - 0018-9383 UR - ISI:000228599700050 L2 - graded-channel MOSITET;harmonic distortion;integral function method (IFM);MOSFET-C filters;quasi-linear resistor;HARMONIC DISTORTION SO - Ieee Transactions on Electron Devices 2005 ;52(5):967-972 13428 UI - 245 AU - Cerecedo D AU - Marinez-Rojas D AU - Chavez O AU - Martinez-Perez F AU - Garcia-Sierra F AU - Rendon A AU - Mornet D AU - Mondragon R AD - Ctr Invest & Estudios Avanzados, Dept Bioquim, Mexico City 07360, DF, MexicoCtr Invest & Estudios Avanzados, Dept Fisiol Biofis & Neurociencias, Mexico City 07360, DF, MexicoCtr Invest & Estudios Avanzados, Dept Biol Celular, Mexico City 07360, DF, MexicoHop St Antoine, INSERM, U592, Lab Physiopathol Cellulaire & Mol Retine, F-75571 Paris, FranceInst Biol, Montpellier, FranceMondragon, R, Ctr Invest & Estudios Avanzados, Dept Bioquim, Av IPM 2508,Col Zacatenco, Mexico City 07360, DF, Mexico TI - Platelet adhesion: Structural and functional diversity of short dystrophin and utrophins in the formation of dystrophinassociated-protein complexes related to actin dynamics AB - Platelets are dynamic cell fragments that modify their shape during activation. Utrophin and dystrophins are minor actin-binding proteins present in muscle and non-muscle cytoskeleton. In the present study, we characterised the pattern of Dp7l isoforms and utrophin gene products by immunoblot in human platelets. Two new dystrophin isoforms were found, Dp71f and Dp71d, as well as the Up71 isoform and the dystrophin-associated proteins, a and beta-dystrobrevins. Distribution of Dp71 d/Dp71 Delta(110)(m), Up400/Up71 and dystrophin-associated proteins in relation to the actin cytoskeleton was evaluated by confocal microscopy in both resting and platelets adhered on glass. Formation of two dystrophin-associated protein complexes (Dp71d/Dp71 Delta(110)(m) similar to DAPC and Up400/Up71 similar to DAPC) was demonstrated by co-immunoprecipitation and their distribution in relation to the actin cytoskeleton was characterised during platelet adhesion. The Dp71d/Dp71 Delta(110)(m)similar to DAPC is maintained mainly at the granulomere and is associated with dynamic structures during activation by adhesion to thrombin-coated surfaces. Participation of both Dp71d/Dp71 Delta(110)(m)similar to DAPC and Up400/Up71 similar to DAPC in the biological roles of the platelets is discussed MH - France MH - Mexico|Distrito Federal PB - STUTTGART: SCHATTAUER GMBH-VERLAG MEDIZIN NATURWISSENSCHAFTEN RP - NOT IN FILE U3 - TC 6 U4 - Hematology;Peripheral Vascular Disease U5 - J;Article AV - English IS - 0340-6245 UR - ISI:000234214900016 L2 - actin structures;adhesion;cytoskeleton;dystrophin-associated protein complexes;platelet activation;DUCHENNE MUSCULAR-DYSTROPHY; ALPHA-DYSTROBREVIN; GRANULE SECRETION; BLOOD-PLATELETS; DP71; CYTOSKELETON; BINDING; CELLS; EXPRESSION; ISOFORMS SO - Thrombosis and Haemostasis 2005 ;94(6):1203-1212 13429 UI - 3686 AU - cero-Ortega C AU - Dorantes L AU - Hernandez-Sanchez H AU - Tapia MS AU - Gutierrez-Lopez G AU - Alzamora S AU - Lopez-Malo A AD - IPN, Escuela Nacl Ciencias Biol, Dept Ingn Bioquim, Mexico City 11340, DF, MexicoCent Univ Venezuela, Fac Ciencias, Inst Ciencia & Tecnol Alimentos, Caracas 1049, VenezuelaUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ind, RA-1428 Buenos Aires, DF, ArgentinaUniv Las Amer Puebla, Dept Ingn Quim, Mexico City 72820, CP, MexicoDorantes, L, IPN, Escuela Nacl Ciencias Biol, Dept Ingn Bioquim, Carpio & Plan Ayala,Coloni Santo Tomas, Mexico City 11340, DF, Mexico TI - Response surface analysis of the effects of Capsicum extract, temperature and pH on the growth and inactivation of Listeria monocytogenes AB - A surface response analysis was carried out using the Box-Behnken method in order to determine the effects and interactions of pH (4.5, 5.5, 6.5), temperature (2, 7, 12degreesC and Capsicum extract concentration (0%, 5%, 10%) on the growth kinetics of Listeria monocytogenes Scott A in trypticase soy broth. Survival ratio quadratic models (log N/N-0) were obtained for the combination of variables, valid only in the specified ranges. Temperature showed no effect on the bacterial inactivation; however both the extract concentration (5%) and pH value (4.5) had a relevant effect on the microbial counts. The models were validated on acidified milk inoculated with L. monocytogenes. According to their evaluation, it may be possible to use the models in order to obtain reasonable initial estimates of the impact of the Capsicum extract, as well as storage conditions, over the growth of L. monocytogenes after 4 and 8 days of storage. (C) 2004 Elsevier Ltd. All rights reserved MH - Argentina MH - Mexico|Distrito Federal MH - Venezuela PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Chemical;Food Science & Technology U5 - J;Article AV - English IS - 0260-8774 UR - ISI:000225668600025 L2 - Modeling;Listeria;Capsicum;pH;inactivation;STORAGE-TEMPERATURE; PREDICTIVE MODELS; ESSENTIAL OIL; INHIBITION; BACTERIA; NITRITE; NACL; CO2 SO - Journal of Food Engineering 2005 ;67(1-2):247-252 13430 UI - 2394 AU - Cervantes-Contreras M AU - Quezada-Maya CA AU - Lopez-Lopez M AU - de la Cruz GG AU - Tamura M AU - Yodo T AD - IPN, Dept Matemat, Unidad Profes Interdisciplinaria Biotecnol, Mexico City 07340, DF, MexicoUP Adolfo Lopez Mateos, IPN, Escuela Super Fis & Matemat, Dept Ciencia Mat, Mexico City 07738, DF, MexicoInst Politecn Nacl, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07000, DF, MexicoOsaka Inst Technol, Asahi Ku, Osaka 5358585, JapanCervantes-Contreras, M, IPN, Dept Matemat, Unidad Profes Interdisciplinaria Biotecnol, Mexico City 07340, DF, Mexico TI - Thermal properties of GaN/Si heterostructures grown by molecular beam epitaxy AB - GaN/Si heterostructures were prepared by molecular beam epitaxy employing different Si substrate nitridation times from 0 to 60 min. The GaN/Si structural properties were evaluated by transmission electron microscopy, X-ray diffraction, and atomic force microscopy. Thermal properties of the GaN/Si heterostructures were studied by the photoacoustic technique. Employing a two-layer model the interfacial thermal conductivity (η) was obtained as a function of the nitridation time. η presented low values of around 150W/cm(2) K in samples with poor structural characteristics. We obtained the maximum value of η = 255W/cm(2) K for the sample prepared with the optimal nitridation time. The variation of the parameter η for different nitridation times can be associated to interface phonon scattering process by the presence of disorder at the GaN/Si interface. © 2005 Elsevier B.V. All rights reserved MH - Japan MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Crystallography U5 - J;Article AV - English IS - 0022-0248 UR - ISI:000228916300078 L2 - crystal structure;interfaces;molecular beam epitaxy;nitrides;GROUP-III NITRIDES; HETEROEPITAXIAL GROWTH; DEVICE APPLICATIONS; THIN-FILMS; SILICON; DENSITY SO - Journal of Crystal Growth 2005 ;278(1-4):415-420 13431 UI - 459 AU - Cervantes-Martinez A AU - Saint-Jalmes A AU - Maldonado A AU - Langevin D AD - Univ Sonora, Dept Fis, Sonora 83000, Hermosillo, MexicoUniv Paris 11, Phys Solides Lab, F-91405 Orsay, FranceUniv Sonora, Dept Invest Polimeros & Mat, Sonora 83000, Hermosillo, MexicoMaldonado, A, Univ Sonora, Dept Fis, Apdo Postal 1626, Sonora 83000, Hermosillo, Mexico TI - Effect of cosurfactant on the free-drainage regime of aqueous foams AB - We report results of drainage in aqueous foams of small bubble size D (D = 180 mu m) prepared with SDS-dodecanol solutions. We have performed free-drainage experiments in which local drainage rates are measured by electrical conductivity and by light scattering techniques. We have investigated the role of the surfactant-cosurfactant mass ratio on the drainage regime. The results confirm that a drainage regime corresponding to a high surface mobility can indeed be found for such small bubbles, and show that an increase in the cosurfactant content can induce a transition to a low surface mobility drainage regime. We show that the transition is not linked to variations of the bulk properties, but rather to variations of the interfacial properties. However, the results show that the added amount of dodecanol to trigger the transition is quite high, evidencing that the relevant control parameter for drainage regimes includes both bubble size and interfacial contributions. (c) 2005 Elsevier Inc. All rights reserved MH - France MH - Mexico|Sonora PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical U5 - J;Article AV - English IS - 0021-9797 UR - ISI:000233534900030 L2 - foams;drainage;cosurfactant;sodium dodecyl sulfate;surface viscosity;LIQUID FLOW; TIME SO - Journal of Colloid and Interface Science 2005 ;292(2):544-547 13432 UI - 2970 AU - Cervantes-Uc JM AU - Vazquez-Torres H AU - Cauich-Rodriguez JV AU - Vazquez-Lasa B AU - del Barrio JS AD - AC Mat, Ctr Invest Cientif Yucatan, Merida 97200, Yucatan, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoCSIC, Inst Ciencia & Tecnol Polimeros, Madrid 28006, SpainCauich-Rodriguez, JV, AC Mat, Ctr Invest Cientif Yucatan, Calle 43 130,Colonia Chuburna Hidalgo, Merida 97200, Yucatan, Mexico TI - Comparative study on the properties of acrylic bone cements prepared with either aliphatic or aromatic functionalized methacrylates AB - Bone cements prepared with methacrylic acid (MAA) and diethyl amino ethyl methacrylate (DEAEM) were compared with formulations employing 4-methacryloyloxybenzoic acid (MBA) and 4-diethyaminobenzyl methacrylate (DEABM) as comonomer. The influence of these new aromatic monomers on various physicochemical, setting and mechanical properties was assessed. Surface characterization demonstrated that bone cements prepared with any of the functionalized monomers exhibited increasing hydrophilicity with monomer concentration and that the aromatic monomers provided more hydrophilic cements than their aliphatic counterparts for low concentrations of the functional monomer. It was also found that bone cements prepared with high amounts of the acidic aliphatic monomer provided the highest exotherm of reaction and their setting times were shorter than NIBA based cements. On the other hand, DEABM containing bone cements exhibited shorter setting times than DEAEM formulations and slightly higher peak temperatures. In general, it was found that the glass transition temperature increased with the presence of acidic comonomer and decreased when alkaline comonomers were present, especially aliphatic ones. When aromatic methacrylates were used at 0.05 molar fraction, the highest tensile and compressive strength were achieved i.e. 46 and 118 MPa for MBA and 51 and 108 MPa for DEABM formulations. A further increase in the aromatic monomer concentration led to cements of low mechanical properties due to solubility problems as revealed by SEM. (C) 2004 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Yucatan MH - Spain PB - OXFORD: ELSEVIER SCI LTD RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 0142-9612 UR - ISI:000227368900001 L2 - acrylic bone cements;mechanical properties;4-methacryloyloxybenzoic acid;diethyaminobenzyl methacrylate;POLY(METHYL METHACRYLATE); MECHANICAL-PROPERTIES; CURING RESINS; COMPOSITES; SURFACES; MONOMERS; BEHAVIOR; AMINES SO - Biomaterials 2005 ;26(19):4063-4072 13433 UI - 1872 AU - Cervantes DB AU - Quiroga SL AU - Perissinotti LJ AU - Socolovsky M AD - Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoUniv Mar del Plata, Fac Ciencias Exactas & Nat, Dept Quim, RA-7600 Mar Del Plata, ArgentinaSocolovsky, M, Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Circuito Exterior,Ciudad Univ, Mexico City 04510, DF, Mexico TI - Bundle theory of improper spin transformations AB - We give a geometrical description of the action of the parity operator ( (P) over cap) P) on non-relativistic spin 1/ 2 Pauli spinors in terms of bundle theory. The relevant bundle, SU(2) circle dot Z(2) -> O( 3), is a non-trivial extension of the universal covering group SU( 2) -> SO( 3). (P) over cap is the non-relativistic limit of the corresponding Dirac matrix operator P = i gamma(0) and obeys (P) over cap (2) = -1 From the direct product of O( 3) by Z(2), naturally induced by the structure of the Galilean group, we identify, in its double cover, the time-reversal operator ((T) over cap) T) acting on spinors, and its product with (P) over cap. (P) over cap (T) over cap generate the group Z(4) x Z(2). As in the case of parity, (T) over cap T is the non-relativistic limit of the corresponding Dirac matrix operator T = gamma(3) gamma(1), and obeys (T) over cap (2) = - 1 MH - Argentina MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER/PLENUM PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0020-7748 UR - ISI:000230033200009 L2 - parity transformation;time reversal;non-relativistic spinors;group theory;FIELD SO - International Journal of Theoretical Physics 2005 ;44(2):267-276 13434 UI - 1054 AU - Cervantes F AU - dos Santos AB AU - de Madrid MP AU - Stams AJM AU - van Lier JB AD - Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85000, Sonora, MexicoUniv Wageningen & Res Ctr, Subdept Environm Technol, NL-6700 EV Wageningen, NetherlandsUniv Wageningen & Res Ctr, Microbiol Lab, NL-6700 EV Wageningen, NetherlandsCervantes, F, Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, 5 Febrero 818 Sur, Obregon 85000, Sonora, Mexico TI - Reductive decolourisation of azo dyes by mesophilic and thermophilic methanogenic consortia AB - The contribution of acidogenic bacteria and methanogenic archaea on the reductive decolourisation of azo dyes was assessed in anaerobic granular sludge. Acidogenic bacteria appeared to play an important role in the decolourising processes when glucose was provided as an electron donor; whereas methanogenic archaea showed a minor role when this substrate was supplemented in excess. In the presence of the methanogenic substrates acetate, methanol, hydrogen and formate, methane production became important only after colour was totally removed from the batch assays. This retardation in methane production may be due to either a toxic effect imposed by the azo dyes or to the competitive behaviour of azo dyes to the methanogenic consortia for the available reducing equivalents MH - Mexico|Sonora MH - Netherlands PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000232146500048 L2 - azo dyes;decolourisation;methanogenic consortium;redox mediator;inhibitors;ANAEROBIC SLUDGE; REDOX MEDIATORS; QUINONE-RESPIRATION; ANTHRAQUINONE DYES; GRANULAR SLUDGE; TRANSFORMATION; TOXICITY; BIOREACTORS; INHIBITION; REACTOR SO - Water Science and Technology 2005 ;52(1-2):351-356 13435 UI - 1201 AU - Cervantez-Martinez A AU - Elias-Gutierrez M AU - Gutierrez-Aguirre MA AU - Kotov AA AD - ECOSUR, Chetumal 77900, Quintana Roo, MexicoInst Technol Chetumal, Lab Bioquim, Chetumal 77013, Quintana Roo, MexicoAN Severstov Inst Ecol & Evolut, Moscow 119071, RussiaElias-Gutierrez, M, ECOSUR, Km 2 Carretera Chetumal Bacalar,Av Centenario Km, Chetumal 77900, Quintana Roo, Mexico TI - Ecological remarks on Mastigodiaptomus nesus Bowman, 1986 (Copepoda : Calanoida) in a Mexican karstic sinkhole AB - Mastigodiaptomus nesus (Bowman, 1986) was previously described from the West Indies, and its distribution was considered restricted to these islands. Recently it has been detected in several systems from the continental Yucatan Peninsula in Mexico. In this study, we contribute to the body size variability, abundance, distribution and vertical migration of Mastigodiaptomus nesus dwelling in a small, deep (264 m(2), 47 m deep) karstic beaker-shaped sinkhole, located in this Peninsula. Here, this species is an important component of the zooplankton community during all the year. We analyzed the relationship between its abundance and concentration of nutrients (NO-3), and Chlorophyll a. Differences in body size by sex (F == 67.56, p < 0.0001; n = 180), and sampled season (F = 6.59, p < 0.01; n = 180) were found. When animals from this sinkhole were compared with other localities, size difference was detected. Bigger animals were found in the West Indies, and smaller ones in continental localities. The nauplii were the most abundant development instars, followed by copepodids, and adults. In general, all developmental instars had a normal migration, with higher abundance at night time in upper layers (0.5 and 5 m), and diminishing towards daylight time. Direction of migrations seems to be towards the walls of the sinkhole (horizontal migration) instead of the deeper water layers, suggesting that these copepods are hidden in the irregular calcareous walls of the sinkhole. Abundance of total copepodid developmental stages were correlated with the Chl-alpha concentration. In addition, we found a highly significant difference between Chl-alpha concentration (F = 24.172, p < 0.00 1, n = 72), and NO-3 concentration at all strata among seasons (F = 25.46, p < 0.001, n = 60). Our results suggest that the body size of M. nesus is influenced by the nutrient concentration, and its vertical abundance and distribution may be explained by food availability MH - Mexico|Quintana Roo MH - Russia PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0018-8158 UR - ISI:000231879200013 L2 - body size;distribution;diaptomidae;Yucatan Peninsula;vertical migration;Chlorophyll-alpha;YUCATAN PENINSULA; VERTICAL MIGRATION; ZOOPLANKTON; CRUSTACEA; RESERVOIR; CENOTES SO - Hydrobiologia 2005 ;542():95-102 13436 UI - 201 AU - Cesarman G AU - Rios-Luna NP AU - Deora AB AU - del Carmen Cravioto M AU - arcon-Segovia D AU - Sanchez-Guerrero J AU - Hajjar KA AD - Cornell Univ, Weill Med Coll, Dept Cell & Dev Biol, New York, NY, USAInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Hematol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Reprod Biol, Mexico City, DF, MexicoInst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Immunol & Rheumatol, Mexico City, DF, Mexico TI - Autoantibodies against the fibrinolytic receptor, annexin 2, in antiphospholipid syndrome MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER SOC HEMATOLOGY RP - NOT IN FILE U3 - TC 0 U4 - Hematology U5 - J;Meeting Abstract AV - English IS - 0006-4971 UR - ISI:000233426000135 SO - Blood 2005 ;106(11):43A-43A 13437 UI - 1055 AU - ceves-Lara CA AU - guilar-Garnica E AU - caraz-Gonzalez V AU - Gonzalez-Reynoso O AU - Steyer JP AU - Dominguez-Beltran JL AU - Gonzalez-Alvarez V AD - Univ Guadalajara, Dept Chem Engn, Guadalajara 44430, Jalisco, MexicoINRA, LBE, F-11100 Narbonne, FranceAceves-Lara, CA, Univ Guadalajara, Dept Chem Engn, M Garcia Barragan 1451, Guadalajara 44430, Jalisco, Mexico TI - Kinetic parameters estimation in an anaerobic digestion process using successive quadratic programming AB - In this work, an optimization method is implemented in an anaerobic digestion model to estimate its kinetic parameters and yield coefficients. This method combines the use of advanced state estimation schemes and powerful nonlinear programming techniques to yield fast and accurate estimates of the aforementioned parameters. In this method, we first implement an asymptotic observer to provide estimates of the non-measured variables (such as biomass concentration) and good guesses for the initial conditions of the parameter estimation algorithm. These results are then used by the successive quadratic programming (SOP) technique to calculate the kinetic parameters and yield coefficients of the anaerobic digestion process. The model, provided with the estimated parameters, is tested with experimental data from a pilot-scale fixed bed reactor treating raw industrial wine distillery wastewater. It is shown that SOP reaches a fast and accurate estimation of the kinetic parameters despite highly noise corrupted experimental data and time varying inputs variables. A statistical analysis is also performed to validate the combined estimation method. Finally, a comparison between the proposed method and the traditional Marquardt technique shows that both yield similar results; however, the calculation time of the traditional technique is considerable higher than that of the proposed method MH - France MH - Mexico|Jalisco PB - LONDON: I W A PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Environmental;Environmental Sciences;Water Resources U5 - J;Article AV - English IS - 0273-1223 UR - ISI:000232146500058 L2 - anaerobic digestion;asymptotic observers;kinetic parameters estimation;successive quadratic programming SO - Water Science and Technology 2005 ;52(1-2):419-426 13438 UI - 1698 AU - ceves-Perez R AU - Villasenor-Pineda L AU - Gomez M AD - Natl Inst Astrophys Opt & Elect, Dept Comp Sci, Language Technol Grp, Mexico City, DF, Mexico. Univ Politecn Valencia, E-46071 Valencia, Spain TI - Towards a multilingual QA system based on the web data redundancy AB - This paper explores the feasibility of a multilingual question answering approach based on the Web redundancy. The paper introduces a system prototype that combines a translation machine with a statistical QA method. The main advantage of this proposal is its small dependence to a given language. The experimental results, obtained from a test set of 165 factual questions, demostrated the great potential of the approach, and gave interesting insights about the redundancy of the web and the online translators MH - Mexico|Distrito Federal MH - Spain T3 - ADVANCES IN WEB INTELLIGENCELecture notes in computer science PB - BERLIN: SPRINGER-VERLAG BERLIN RP - ON REQUEST (04/14/08) U4 - Computer Science, Theory & Methods U5 - S;Article NT - SEnglishArticlermaceves@inaoep.mx villasen@inaoep.mx mmontesg@inaoep.mx0HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE COMPUT SCIBCN66 AV - English IS - 0302-9743 UR - ISI:000230302600006 SO - 2005 ;():32-37 13439 UI - 2259 AU - Chacon-Salinas R AU - Serafin-Lopez J AU - Ramos-Payan R AU - Mendez-Aragon P AU - Hernandez-Pando R AU - Van Soolingen D AU - Flores-Romo L AU - Estrada-Parra S AU - Estrada-Garcia I AD - Inst Politecn Nacl, ENCB, Dept Inmunol, Mexico City 11340, DF, MexicoNatl Inst Med Sci & Nutr Salvador Zubiran, Dept Expt Pathol, Mexico City, DF, MexicoRIVM, Mycobacterial Reference Dept, Diagnost Lab Infect Dis & Perinatal Screening, Bilthoven, NetherlandsIPN, CINVESTAV, Ctr Adv Res, Dept Cellular Biol, Mexico City 07738, DF, MexicoEstrada-Garcia, I, Inst Politecn Nacl, ENCB, Dept Inmunol, Carpio & Plan Ayala S-N Col Santo Tomas, Mexico City 11340, DF, Mexico TI - Differential pattern of cytokine expression by macrophages infected in vitro with different Mycobacterium tuberculosis genotypes AB - It has been shown recently that different genotypes of Mycobacterium tuberculosis induce distinct immune responses in the host, as reflected by variations in cytokine and iNOS expression. Because these molecules are probably regulated by multiple factors in vivo this complex phenomenon was partially analysed by assessing cytokine and iNOS expression by real-time polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA) in an in vitro model of bone marrow-derived macrophages infected with three different M. tuberculosis genotypes: Canetti, H37 Rv and Beijing. Although the three genotypes induced production of iNOS and the different cytokines tested at 24 h post-infection, macrophages infected with the Beijing isolate expressed the highest levels of mRNA for iNOS, interleukin (IL)-1 beta, tumour necrosis factor (TNF)-alpha, IL-12 cytokines and lower levels of IL-10 compared with cells infected with other genotypes. This expression pattern has been associated with infection control, but during infection in vivo with the Beijing genotype it is lost upon progression to chronic phase. The failure to control infection is likely to be influenced by cytokines produced by other cell types and bacterial molecules expressed during the course of disease. Results presented in this work show that each genotype has the ability to induce different levels of cytokine expression that could be related to its pathogenesis during infection MH - Mexico|Distrito Federal MH - Netherlands PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 5 U4 - Immunology U5 - J;Article AV - English IS - 0009-9104 UR - ISI:000229227000006 L2 - bone marrow derived macrophages;cytokine expression;Mycobacterium tuberculosis genotypes;INTERFERON-GAMMA; GENE-EXPRESSION; DENDRITIC CELLS; IMMUNE-RESPONSE; RECEPTOR GENE; SUSCEPTIBILITY; PATHOGENESIS; MATURATION; VIRULENCE; AFRICANS SO - Clinical and Experimental Immunology 2005 ;140(3):443-449 13440 UI - 3065 AU - Chacra AR AU - Davidson JA AU - Diaz J AU - Escalante-Pulido M AU - Litwak LE AU - Mestman JH AU - More L AU - Violante RM AD - Univ Texas, Med City Dallas Hosp, SW Med Sch, Endocrine & Diabet Associates Texas, Dallas, TX 75230, USAUniv Fed Sao Paulo, Sao Paulo, BrazilUniv Chile, Hosp San Juan Dios, Santiago, ChileMexican Inst Social Secur, Guadalajara, Jalisco, MexicoHosp Italiano Buenos Aires, Buenos Aires, DF, ArgentinaUniv So Calif, Los Angeles, CA, USAUniv Peruana Cayetano Heredia, Lima, PeruCtr Univ, Fac Med Tampico, Tampico, MexicoDavidson, JA, Endocrine & Diabet Associates Texes, 7777 Forest Lane,Suite C-204, Dallas, TX 75230 USA TI - An algorithm for the treatment of type 2 diabetes in Latin America AB - Diabetes is a principal and growing health concern in Latin America, accounting for significant mortality and morbidities. Large, randomized, prospective trials of various interventional therapies in patients with both type 1 and type 2 diabetes have demonstrated that reductions in hyperglycaemia and management of diabetes-related risk factors can significantly reduce the micro- and macrovascular complications of diabetes. Therefore, patients with type 2 diabetes will benefit from more aggressive treatment regimens to help decrease the occurrence and rate of progression of diabetic complications. Given the many complexities of diabetes management, it is often difficult for general practice physicians to stay abreast of emerging treatment strategies and therapies. Owing to the high prevalence of type 2 diabetes in Latin America, the majority of patients with diabetes are treated by generalists rather than specialists. This article was intended to assist physicians and other healthcare professionals in developing and using effective treatment strategies to stem the growing epidemic of diabetes and its complications in Latin America MH - Argentina MH - Brazil MH - Chile MH - Mexico|Jalisco MH - Mexico|Tamaulipas MH - Peru MH - USA PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 2 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 1462-8902 UR - ISI:000227062600005 L2 - diabetes treatment;AIC;glycaemic control;self-monitoring of blood glucose;IMPAIRED GLUCOSE-TOLERANCE; PLACEBO-CONTROLLED TRIAL; MICROVASCULAR COMPLICATIONS; BLOOD-GLUCOSE; INTENSIVE THERAPY; SUBGROUP ANALYSIS; GLYCEMIC CONTROL; INSULIN ACTION; LIFE-STYLE; MELLITUS SO - Diabetes Obesity & Metabolism 2005 ;7(2):148-160 13441 UI - 2133 AU - Chagot B AU - Dai L AU - Pil J AU - Tytgat J AU - Nakajima T AU - Corzo G AU - Darbon H AU - Ferrat G AD - CNRS, UMR 6098, F-13402 Marseille, FranceUniv Aix Marseille 1, F-13402 Marseille, FranceUniv Aix Marseille 2, F-13402 Marseille, FranceUniv Calif Riverside, Dept Entomol, Riverside, CA 92521, USAUniv Leuven, Toxicol Lab, B-3000 Louvain, BelgiumSuntory Inst Bioorgan Res, Osaka 6188503, JapanInst Biotechnol, Dept Mol Recognit & Struct Biol, Cuernavaca, Morelos, MexicoDarbon, H, CNRS, UMR 6098, 31 Chemin ZJoseph Aiguier, F-13402 Marseille, France TI - An unusual fold for potassium channel blockers: NMR structure of three toxins from the scorpion Opisthacanthus madagascariensis AB - The Om-toxins are short peptides (23-27 amino acids) purified from the venom of the scorpion Opisthacanthus madagascariensis. Their pharmacological targets are thought to be potassium channels. Like Cs alpha/beta (cystine-stabilized alpha/beta) toxins, the Om-toxins alter the electrophysiological properties of these channels; however, they do not share any sequence similarity with other scorpion toxins. We herein demonstrate by electrophysiological experiments that Om-toxins decrease the amplitude of the K+ current of the rat channels Kv1.1 and Kv1.2, as well as human Kv1.3. We also determine the solution structure of three of the toxins by use of two-dimensional proton NMR techniques followed by distance geometry and molecular dynamics. The structures of these three peptides display an uncommon fold for ion-channel blockers, Cs alpha/alpha (cystine-stabilized alpha-helix-loop-helix), i.e. two alpha-helices connected by a loop and stabilized by two disulphide bridges. We compare the structures obtained and the dipole moments resulting from the electrostatic anisotropy of these peptides with those of the only other toxin known to share the same fold, namely kappa-hefutoxin1 MH - Belgium MH - France MH - Japan MH - Mexico|Morelos MH - USA PB - LONDON: PORTLAND PRESS LTD RP - NOT IN FILE U3 - TC 9 U4 - Biochemistry & Molecular Biology U5 - J;Article AV - English IS - 0264-6021 UR - ISI:000229464800029 L2 - cystine-stabilized helix-loop-helix structural motif;NMR;Opisthacanthus madagascariensis;potassium channel;scorpion toxin;structure determination;SENSITIVE CALCIUM-CHANNEL; CYSTINE KNOT; PROTEIN STRUCTURES; BUTHUS-MARTENSI; ASSASSIN BUG; MOTIF; POLYPEPTIDES; SPECTROSCOPY; MAUROTOXIN SO - Biochemical Journal 2005 ;388():263-271 13442 UI - 686 AU - Chaidez C AU - Soto M AU - Gortares P AU - Mena K AD - Ctr Invest Alimentac & Desarrollo, Dept Food Safety, Culiacan, MexicoInst Tecnol Sonora, Obregon, MexicoUniv Texas, Austin, TX 78712, USAChaidez, C, PMB-053248,413 Interamer Blvd,WH1, Laredo, TX 78045, USA TI - Occurrence of Cryptosporidium and Giardia in irrigation water and its impact on the fresh produce industry AB - In Mexico, relatively few studies have examined the presence of protozoan parasites from surface waters with irrigation and wash-water applications in the fresh produce industry. In this study, the presence of Cryptosporidium oocysts and Giardia cysts in surface water for irrigation, washing and disinfecting applications was evaluated. In addition, the occurrence of Cryptosporidium oocysts and Giardia cysts was determined in wash-water tanks at selected packinghouses. The occurrence of both Cryptosporidium and Giardia was determined by an immunofluorescent technique. Forty-eight percent of the surface water samples tested positive for Cryptosporidium oocysts and 50% tested positive for Giardia cysts. Concentration ranges for Cryptosporidium oocysts and Giardia cysts were 17-200 and 17-1633 per 100 litres, respectively. Sixteen percent of the wash-water tanks tested positive for Cryptosporidium oocysts and 83% were positive for Giardia cysts with concentrations ranging from 1-133 oocysts and 100-533 cysts per 100 litres, respectively. The presence of protozoan parasites in surface water for irrigation and packinghouse operations suggests that there may be a risk of contamination of fresh produce as protozoan oocysts/cysts might come in contact with and attach to crop surfaces posing a risk of infection to consumers who eat these products MH - Mexico|Sinaloa MH - Mexico|Sonora MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 4 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0960-3123 UR - ISI:000233115000002 L2 - Giardia;Cryptosporidium;surface water;fresh produce;irrigation water;INDICATORS; CYSTS SO - International Journal of Environmental Health Research 2005 ;15(5):339-345 13443 UI - 2668 AU - Chaikina EI AU - Stepanov S AU - Navarrete AG AU - Mendez ER AU - Leskova TA AD - Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Ensenada 22800, Baja California, MexicoUniv Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, MexicoUniv Calif Irvine, Dept Phys & Astron, Irvine, CA 92697, USAUniv Calif Irvine, Inst Surface & Interface Sci, Irvine, CA 92697, USAChaikina, EI, Ctr Invest Cient & Educ Super Ensenada, Div Fis Aplicada, Apartado Postal 2732, Ensenada 22800, Baja California, Mexico TI - Formation of angular power profile via ballistic light transport in multimode optical fibers with corrugated surfaces AB - We present experimental results on the light transmission and intermode power exchange in multimode fibers with rough surfaces. The experiments were performed with chemically etched 200-mu m-diameter cores of fused silica fibers that can support up to 700 X 700 guided modes at the wavelength employed, lambda approximate to 0.6 mu m. After propagation through some rough fiber section the mode power profile acquires a Gaussian shape that propagates along the mean axis of the corrugated fiber, with a slowly reducing radius (alpha 1/ root z), and practically without attenuation of the central intensity. These features, and other observed characteristics, are reproduced with a theory that assumes a ballistic regime of light propagation through a one-dimensional slab waveguide, relating the characteristic propagation lengths to parameters of the fiber surface roughness MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 3 U4 - Physics, Condensed Matter U5 - J;Article AV - English IS - 1098-0121 UR - ISI:000228065300081 L2 - DISORDERED WAVE-GUIDES; PHOTON LOCALIZATION; SCATTERING; STATISTICS; WAVEGUIDES; TRANSITION SO - Physical Review B 2005 ;71(8): 13444 UI - 980 AU - Chandler CJ AU - Brogan CL AU - Shirley YL AU - Loinard L AD - Natl Radio Astron Observ, Socorro, NM 87801, USAUniv Hawaii, Astron Inst, Hilo, HI 96720, USAUniv Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, MexicoChandler, CJ, Natl Radio Astron Observ, POB O, Socorro, NM 87801, USA TI - IRAS 16293-2422: Proper motions, jet precession, the hot core, and the unambiguous detection of infall AB - We present high spatial resolution observations of the multiple protostellar system IRAS 16293-2422 using the Submillimeter Array (SMA) at 300 GHz and the Very Large Array ( VLA) at frequencies from 1.5 to 43 GHz. This source was already known to be a binary system with its main components, A and B, separated by similar to 5 ''. The new SMA data now separate source A into two submillimeter continuum components, which we denote Aa and Ab. The strongest of these, Aa, peaks between the centimeter radio sources A1 and A2, but the resolution of the current submillimeter data is insufficient to distinguish whether this is a separate source or the centroid of submillimeter dust emission associated with A1 and A2. Archival VLA data spanning 18 yr show proper motion of sources A and B of 17 mas yr (-1), associated with the motion of the rho Ophiuchi cloud. We also find, however, significant relative motion between the centimeter sources A1 and A2, which excludes the possibility that these two sources are gravitationally bound unless A1 is in a highly eccentric orbit and is observed at periastron, the probability of which is low. A2 remains stationary relative to source B, and we identify it as the protostar that drives the large-scale northeast-southwest CO outflow. A1 is shock-ionized gas that traces the location of the interaction between a precessing jet and nearby dense gas. This jet probably drives the large-scale east-west outflow, and indeed its motion is consistent with the wide opening angle of this flow. The origin of this jet must be located close to A2 and may be the submillimeter continuum source Aa. Thus, source A is now shown to comprise three (proto) stellar components within 1 ''. Source B, on the other hand, is single, exhibits optically thick dust emission even at 8 GHz, has a high luminosity, and yet shows no sign of outflow. It is probably very young and may not even have begun a phase of mass loss yet. The SMA spectrum of IRAS 16293-2422 reports the first astronomical identification of many lines of organic and other molecules at 300 and 310 GHz. The species detected are typical of hot cores, the emission from which is mainly associated with source A. The abundances of second-generation species, especially of sulphur-bearing molecules, are significantly higher than predicted by chemical models for this source to date, and we suggest that shocks are probably needed to explain these enhancements. The peaks in the integrated emission from molecules having high rotation temperatures coincide with the centimeter source A1, also highlighting the key role of shocks in explaining the nature of hot cores. Finally, we use the high brightness temperature of the submillimeter dust emission from source B to demonstrate the unambiguous detection of infall by observing redshifted SO (7(7) - 6(6)) absorption against the emission from its dust disk MH - Mexico|Michoacan MH - USA PB - CHICAGO: UNIV CHICAGO PRESS RP - NOT IN FILE U3 - TC 14 U4 - Astronomy & Astrophysics U5 - J;Article AV - English IS - 0004-637X UR - ISI:000232366000027 L2 - circumstellar matter;dust,extinction;ISM : clouds;stars : formation;stars : individual (IRAS 16293-2422);PROTOSTAR IRAS 16293-2422; STAR-FORMING REGIONS; RADIO-CONTINUUM EMISSION; YOUNG STELLAR OBJECTS; W51 MASSIVE CORES; MOLECULAR ABUNDANCES; DYNAMICAL COLLAPSE; ORGANIC-MOLECULES; SULFUR CHEMISTRY; INTERSTELLAR HNO SO - Astrophysical Journal 2005 ;632(1):371-396 13445 UI - 3062 AU - Chandra R AU - Singh J AU - Rath PK AU - Raina PK AU - Hirsch JG AD - Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh, IndiaIIT, Dept Phys, Kharagpur 721302, W Bengal, IndiaUniv Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoChandra, R, Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh, India TI - Two-neutrino double-beta decay of 94 <= A <= 110 nuclei for the 0(+)-> 0(+) transition AB - The two-neutrino double-beta decay of Zr-94,Zr-96, Mo-98,Mo-100, Ru-104 and Pd-110 nuclei for the 0(+) --> 0(+) transition is studied in the PHFB model in conjunction with the summation method. In the first step, the reliability of the intrinsic wave functions has been established by obtaining an overall agreement between a number of theoretically calculated spectroscopic properties and the available experimental data for Zr-94,Zr-96, Mo-94,Mo-96,Mo-98,Mo-100, Ru-98,Ru-100,Ru-104, Pd-104,Pd-110 and Cd-110 isotopes. Subsequently, the PHFB wave functions of the above-mentioned nuclei are employed to calculate the nuclear transition matrix elements M-2nu as well as half-lives T-1/2(2nu). Furthermore, we have studied the effects of deformation on the M-2nu MH - India MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER RP - NOT IN FILE U3 - TC 3 U4 - Physics, Nuclear;Physics, Particles & Fields U5 - J;Article AV - English IS - 1434-6001 UR - ISI:000227184600005 L2 - RANDOM-PHASE-APPROXIMATION; SHELL-MODEL; EXCITED-STATES; ELECTRON-CAPTURE; BARYON NUMBER; EVEN NUCLEI; HALF-LIVES; MO-100; ZR-96; DEFORMATIONS SO - European Physical Journal A 2005 ;23(2):223-234 13446 UI - 2453 AU - Chandramohan R AU - Mahalingam T AU - Chu JP AU - Sebastian PJ AD - Alagappa Univ, Dept Phys, Karaikkudi 630002, Tamil Nadu, IndiaNatl Taiwan Ocean Univ, Inst Mat Engn, Chilung 20224, TaiwanUNAM, CIE, Solar Hydrogen Fuel Cell Grp, Mexico City 62580, DF, MexicoIMP, Mexico City 07730, DF, MexicoMahalingam, T, Alagappa Univ, Dept Phys, Karaikkudi 630002, Tamil Nadu, India TI - Preparation and characterization of electrosynthesized zinc selenide thin films AB - The electrosynthesis of ZnSe thin films from aqueous acidic bath onto transparent conducting oxide coated glass substrates without any additives is described. The deposition potential range suitable for the deposition has been optimized using cyclic voltammetry. The influence of various deposition parameters on the structural and optical properties of the films is described. The optical constants 'n' and 'k' and the complex dielectric constants of the electrosynthesized ZnSe thin films are estimated for various wave length region. The surface morphological studies and the composition analysis are carried out and the results are discussed MH - India MH - Mexico|Distrito Federal MH - Taiwan PB - MONTREAL: ECOLE POLYTECHNIQUE MONTREAL RP - NOT IN FILE U3 - TC 1 U4 - Electrochemistry;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1480-2422 UR - ISI:000228661100010 L2 - ZnSe;electrosynthesis;cyclic voltammetry;thin film;optical properties;ZNSE; ELECTRODEPOSITION; DEPOSITION; TELLURIUM SO - Journal of New Materials for Electrochemical Systems 2005 ;8(2):143-148 13447 UI - 2075 AU - Chaperon M AU - de Medrano SL AU - Samaniego JL AD - Inst Math Jussieu, F-75251 Paris, FranceUniv Paris 07, UFR Math, F-75251 Paris, FranceUNAM, Fac Ciencias, Mexico City 04510, DF, MexicoUNAM, Inst Matemat, Mexico City 04510, DF, MexicoFac Ciencias, Dept Math, Mexico City 04510, DF, MexicoChaperon, M, Inst Math Jussieu, Case 7012,2,Pl Jussieu, F-75251 Paris, France TI - On sub-harmonic bifurcations AB - Under fairly general hypotheses, we investigate by elementary methods the structure of the p-periodic orbits of a family h(u) of transformations near (u(0), x(0)) when h(u0) (x(0)) = x(0) and dh(u0) (x(0)) has a simple eigenvalue which is a primitive p-th root of unity. (c) 2005 Academie des sciences. Published by Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1631-073X UR - ISI:000229649000010 SO - Comptes Rendus Mathematique 2005 ;340(11):827-832 13448 UI - 2076 AU - Chaperon M AU - de Medrano SL AD - Inst Math Jussieu, F-75251 Paris, FranceUniv Paris 07, UFR Math, F-75251 Paris, FranceUNAM, Fac Ciencias, Mexico City 04510, DF, MexicoUNAM, Inst Matemat, Mexico City 04510, DF, MexicoChaperon, M, Inst Math Jussieu, Caes 7012,2,Pl Jussieu, F-75251 Paris, France TI - On the Hopf bifurcation for flows AB - Under fairly general hypotheses, we prove the existence of the families of periodic orbits obtained by Hopf bifurcation, with emphasis on their smoothness. A Banach version of a theorem of Lyapounov is obtained as a corollary. The proofs are complete, simple and original. (c) 2005 Academie des sciences. Published by Elsevier SAS. All rights reserved MH - France MH - Mexico|Distrito Federal PB - PARIS: EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 1631-073X UR - ISI:000229649000011 SO - Comptes Rendus Mathematique 2005 ;340(11):833-838 13449 UI - 2868 AU - Chapin AR AU - Carpenter CM AU - Dudley WC AU - Gibson LC AU - Pratdesaba R AU - Torres O AU - Sanchez D AU - Belkind-Gerson J AU - Nyquist I AU - Karnell A AU - Gustafsson B AU - Halpern JL AU - Bourgeois AL AU - Schwab KJ AD - Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Environm Hlth Sci, Baltimore, MD 21205, USAJohns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD 21205, USAInst Nutr Cent Amer & Panama, Guatemala City, GuatemalaHosp Nino Morelense, Cuernavaca, Morelos, MexicoSBL Vaccin, Stockholm, SwedenSchwab, KJ, Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Environm Hlth Sci, 615 N Wolfe St,Room E6620, Baltimore, MD 21205 USA TI - Prevalence of norovirus among visitors from the United States to Mexico and Guatemala who experience traveler's diarrhea AB - Traveler's diarrhea (TD) is the most common infectious illness acquired by visitors to developing nations. The purpose of this study was to utilize molecular diagnostic techniques to determine the prevalence of norovirus (NoV) in TD occurring among visitors from the United States to Guatemala and Mexico. Stool samples (n = 54) were collected from 34 TD cases and analyzed for NoV by reverse transcription-PCR and oligoprobe confirmation. The overall prevalence of NoV was 65%. Interestingly, all NoV-positive stool samples were identified as genogroup I NoVs, and time spent at travel destinations was found to be an important factor in determining the frequency of infection (P = 0.003). Eleven NoV-positive stool samples also tested positive for enterotoxigenic Escherichia coli, indicating that dual infections with this leading bacterial cause of TD were very common. Results of this study suggest that NoV infection is a frequent occurrence among travelers to Mexico and Guatemala who experience episodes of TD. In addition, the simple molecular detection method utilized here will serve to facilitate more in-depth epidemiological studies of this emergent viral pathogen in travelers and other at-risk populations MH - Guatemala MH - USA MH - Mexico|Morelos MH - Sweden PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 11 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000227538900017 L2 - NORWALK-LIKE VIRUSES; HEPATITIS-A VIRUS; ESCHERICHIA-COLI; MOLECULAR EPIDEMIOLOGY; IMMUNOSORBENT-ASSAY; HUMAN CALICIVIRUSES; GASTROENTERITIS; PCR; OUTBREAKS; EAST SO - Journal of Clinical Microbiology 2005 ;43(3):1112-1117 13450 UI - 158 AU - Charatonik JJ AU - Prajs JR AD - Univ Wroclaw, Inst Math, PL-50384 Wroclaw, PolandUNAM, Inst Matemat, Mexico City 04510, DF, MexicoCalif State Univ Sacramento, Dept Math & Stat, Sacramento, CA 95819, USAUniv Opole, Inst Math, PL-45052 Opole, PortugalCharatonik, JJ, Univ Wroclaw, Inst Math, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - AANR spaces and absolute retracts for tree-like continua AB - Continua that are approximative absolute neighborhood retracts (AANR's) are characterized as absolute terminal retracts, i.e., retracts of continua in which they are embedded as terminal subcontinua. This implies that any AANR continuum has a dense arc component, and that any ANR continuum is an absolute terminal retract. It is proved that each absolute retract for any of the classes of: tree-like continua, lambda-dendroids, dendroids, arc-like continua and arc-like lambda-dendroids is an approximative absolute retract (so it is an AANR). Consequently, all these continua have the fixed point property, which is a new result for absolute retracts for tree-like continua. Related questions are asked MH - Mexico|Distrito Federal MH - Poland MH - Portugal MH - USA PB - PRAGUE 1: CZECHOSLOVAK MATHEMATICAL JOURNAL RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0011-4642 UR - ISI:000234865400005 L2 - AANR;absolute retract;arc component;arc-like;continuum;decomposable;dendroid;hereditarily unicoherent;retraction;terminal continuum;tree-like SO - Czechoslovak Mathematical Journal 2005 ;55(4):877-891 13451 UI - 611 AU - Charatonik JJ AU - Prajs JR AD - Univ Wroclaw, Math Inst, PL-50384 Wroclaw, PolandUniv Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Opole, Inst Math, PL-45052 Opole, PolandCalif State Univ Sacramento, Dept Math & Stat, Sacramento, CA 95819, USACharatonik, JJ, Univ Wroclaw, Math Inst, Pl Grunwaldzki 2-4, PL-50384 Wroclaw, Poland TI - Generalized epsilon-push property for certain atriodic continua AB - We show that an absolute retract for hereditarily unicoherent continua that contains no simple triod must be an arc-like continuum. More general results are proved for a class of continua having only arcs as their proper subcontinua MH - Mexico|Distrito Federal MH - Poland MH - USA PB - HOUSTON: UNIV HOUSTON RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0362-1588 UR - ISI:000228916700009 L2 - absolute retract;arc;arc-like;atriodic;compactum;continuum;generalized epsilon-push property;hereditarily unicoherent;retraction;solenoid;HEREDITARILY UNICOHERENT CONTINUA; ABSOLUTE RETRACTS SO - Houston Journal of Mathematics 2005 ;31(2):441-450 13452 UI - 4049 AU - Charatonik JJ AU - Prajs JR AD - Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, MexicoUniv Wroclaw, Inst Math, PL-50384 Wroclaw, PolandCalif State Univ Sacramento, Dept Math & Stat, Sacramento, CA 95819, USAUniv Opole, Inst Math, PL-45052 Opole, PolandCharatonik, JJ, Univ Nacl Autonoma Mexico, Inst Matemat, Mexico City 04510, DF, Mexico TI - On lifting properties for confluent mappings AB - Known results about lifting of paths for covering, light open and light confluent mappings are in some sense extended for all confluent mappings with the domain being a continuum having the arc property of Kelley. As an application we prove that each confluently tree-like continuum has the fixed point property MH - Mexico|Distrito Federal MH - Poland MH - USA PB - PROVIDENCE: AMER MATHEMATICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0002-9939 UR - ISI:000224695400033 L2 - Arc property of Kelley;confluent mapping;continuum;lifting;locally connected;tree-like;DENDRITES; CONTINUA SO - Proceedings of the American Mathematical Society 2005 ;133(2):577-585 13453 UI - 2883 AU - Charpentier I AU - Espindola JM AD - IMAG, LMC,Project Idopt, INPG,CNRS, UJF,INRIA, F-38041 Grenoble, FranceUNAM, Inst Geofis, Mexico City 04510, DF, MexicoCharpentier, I, IMAG, LMC,Project Idopt, INPG,CNRS, UJF,INRIA, 51,Rue Math, F-38041 Grenoble, France TI - A study of the entrainment function in models of Plinian columns: characteristics and calibration AB - Many of the processes involved in volcanic eruptive columns may be described through physical models based on conservation laws in which a physical parametrization called the entrainment function plays an important role. The solution of inverse problems and the estimation of the characteristics of ancient eruptions are among the purposes of these models that require a better knowledge of the characteristics and properties of this function. The first part of the study shows that the three usual shapes chosen for this function yield apparently the same behaviour of the column. However, we prove that a piecewise constant shape may be unsuitable in optimization processes based on gradient methods. It also turns out that the parameters defining the entrainment function cannot be considered constant. In the second part of the paper, the unique parameter of the remaining two functions is viewed as dependent on the boundary conditions and specified with respect to them. A calibration of the entrainment function with respect to real data is achieved through a power law established between column height and discharge, the latter being related to velocity, radius and bulk density at the vent. According to a discussion on eruptive data, the construction of a mathematical parametrization for epsilon, with respect to boundary conditions and the heights of the vent and the tropopause, appears to be an unwarranted and difficult task since any new addition to the observed data will definitely modify the power law. A 4-D database covering the range of boundary conditions usually found in Plinian eruptions, together with an interpolation operator, are constructed in order to provide an approximated parameter for any set of boundary conditions in the range considered. Numerical results with a database of dimension 9(4) show that the approximated parameter allows one to recover column height very accurately MH - France MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 1 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0956-540X UR - ISI:000227592700029 L2 - calibration of the entrainment function;database;entrainment function;Plinian columns;sensitivity analysis;EXPLOSIVE VOLCANIC-ERUPTIONS; DYNAMICS; HEIGHTS SO - Geophysical Journal International 2005 ;160(3):1123-1130 13454 UI - 3109 AU - Charpentier I AU - Espindola JM AD - Univ Grenoble 1, CNRS, INRIA, INPG,Lab Modelisat & Calcul,Projet Idopt, F-38041 Grenoble 9, FranceUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, MexicoCharpentier, I, Univ Grenoble 1, CNRS, INRIA, INPG,Lab Modelisat & Calcul,Projet Idopt, BP 53, F-38041 Grenoble 9, France TI - Local sensitivity analysis of a numerical model of volcanic plinian columns through automatic differentiation AB - Numerical simulation of geological phenomena are nowadays widely used to understand them. A good example are the numerous codes developed to model mass motion in different processes. Such models are approximations to the real phenomena because the physical conditions are simplified or because the values of the parameters intervening in the modeling are known only approximately. For this reason, an obligatory step in the application of these models is the assessment of their sensitivity to changes in the parameters. Sensitivity analysis is also required to evaluate the influence of the different input variables in the outcome of the model. In general this analysis is carried out by repeated computation of the model to different sets of input variables and settings of the model. A more fruitful procedure to carry out such analysis can be achieved by automatic differentiation. In this paper we illustrate such approach through its application to the model of an eruptive plinian column. The results of the analysis allow to assess, in a systematic and efficient manner, the relevance of the different boundary values and parameters of the model. The analysis reveals the effects on velocity, temperature, gas fraction, radius and ultimately column height, by changes in their boundary value (i.e. at the vent). The effect of changes in the value of the gas constants, density of pyroclasts and specific heat of the erupted material is also evidenced. Alternatively, the results can be regarded as a mean to estimate the values of the variables for different set of boundary values without recurring to new runs of the model. Automatic differentiation is shown to be a convenient scheme to obtain derivatives of model variables. This type of analysis forms in addition the basis for further work in inversion schemes MH - France MH - Mexico|Distrito Federal PB - NEW YORK: SPRINGER/PLENUM PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Geosciences, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0882-8121 UR - ISI:000226945600005 L2 - automatic differentiation;sensitivity analysis;plinian columns;Woods' model SO - Mathematical Geology 2005 ;37(1):95-113 13455 UI - 1867 AU - Chattaraj PK AU - Gonzalez-Rivas N AU - Matus MH AU - Galvan M AD - Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Basic & Ingn, Mexico City 09340, DF, MexicoIndian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, IndiaChattaraj, PK, Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Basic & Ingn, AP 55-534, Mexico City 09340, DF, Mexico TI - Substituent effects AB - Inductive and resonance effects of different substituents (CH3, Cl, NH3, CN, NO2) on the reactivity of the nitrogen and oxygen centers of several saturated and unsaturated hydroxylamine derivates toward hard and soft electrophiles are analyzed in terms of various conceptual DFT based descriptors calculated using B3LYP/6-311G** method. In most cases, the I and M effects are correctly described by these descriptors. The way the substituent effect dies down as the distance between the substituent and the active center increases is also analyzed. It is observed that more than one effect is to be considered to properly understand the effect of a substituent on reactivity MH - India MH - Mexico|Distrito Federal PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Physics, Atomic, Molecular & Chemical U5 - J;Article AV - English IS - 1089-5639 UR - ISI:000230122600010 L2 - ABSOLUTE ELECTRONEGATIVITY; CHEMICAL-REACTIVITY; FUKUI FUNCTION; HARDNESS SO - Journal of Physical Chemistry A 2005 ;109(25):5602-5607 13456 UI - 1870 AU - Chavez-Delgado ME AU - Gomez-Pinedo U AU - Feria-Velasco A AU - Huerta-Viera M AU - Castaneda SC AU - Toral FALD AU - Parducz A AU - Anda SL AU - Mora-Galindo J AU - Garcia-Estrada J AD - IMSS, Hosp Gen Zona 89, Dept Otorrinolaringol, Guadalajara, Jalisco, MexicoCIATEJ, Div Patol & Biotecnol Ambiental, Guadalajara, Jalisco, MexicoOPD Antiguo Hosp Civil Guadalajara, Clin Patol Lab, Guadalajara, Jalisco, MexicoUniv Guadalajara, Ctr Univ Ciencias Biol & Agropeduarias, Dept Biol Celular & Mol, Unidad Morfol Alta Resoluc, Zapopan, Jalisco, MexicoUniv Colima, Ctr Univ Invest Biomed, Colima, Colima, MexicoHosp Gen Zona 89, Dept Cirugia, Guadalajara, Jalisco, MexicoUniv Guadalajara, CUCEI, Inst Madera Celulosa & Papel, Zapopan, Jalisco, MexicoHungarian Acad Sci, Inst Biophys Biol Res Ctr, Dept Mol Neurobiol, Szeged, HungaryUniv Guadalajara, Ctr Univ Ciencias Salud, Guadalajara 44430, Jalisco, MexicoIMSS, Ctr Invest Biomed Occidente, Guadalajara 44430, Jalisco, MexicoChavez-Delgado, ME, IMSS, Hosp Gen Zona 89, Dept Otorrinolaringol, Guadalajara, Jalisco, Mexico TI - Ultrastructural analysis of guided nerve regeneration using progesterone- and pregnenolone-loaded chitosan prostheses AB - Recently, numerous guide chambers for the treatment of injured nerves made up of different biomaterials have been designed, capable of hosting living cells or carrying neurotrophic or neuroactive substances to be directly released to the injured tissue. In this study, chitosan prostheses containing neurosteroids; (progesterone and pregnenolone) were used for bridging a 10-mm gap in the rabbit facial nerve. Gas chromatography was used to quantify neurosteroid content in the prostheses prior to and after subcutaneous implantation at different periods of up to 60 days. The regeneration of the nerve fibers were evaluated at 15 and 45 days after axotomy by means of ultrastructural morphometric analysis. Different nerve fibers regenerative patterns were seen depending the groups studied and the analyzed stages. At 15 days after axotomy, the newly regenerating tissue revealed Schwann cells holding nonmyelinated nerve fiber bundles in an incipient and organized regenerative pattern. At 45 days, the regenerating tissue showed myelinated nerve fibers of different sizes, shapes, and myelin sheath thickness. Although the regeneration of the nerve fibers under neurosteroid treatment showed statistically significant differences in comparison with vehicle regenerated tissue, progesterone-loaded chitosan prostheses produced the best guided nerve regeneration response. These findings indicate that chitosan prostheses allowed regeneration of nerve fibers in their lumen, and when containing neurosteroids produced a faster guided nerve regeneration acting as a long-lasting release delivery vehicle. (c) 2005 Wiley Periodicals, Inc MH - Hungary MH - Mexico|Colima MH - Mexico|Jalisco PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Biomedical;Materials Science, Biomaterials U5 - J;Article AV - English IS - 1552-4973 UR - ISI:000230155200022 L2 - polymers;facial nerve repairment;nerve guide;chitosan;drug delivery;progesterone;pregnenolone;guided tissue regeneration;SCHWANN-CELLS; PHYSICAL-PROPERTIES; MYELIN FORMATION; SCIATIC-NERVE; TUBES; ANGIOGENESIS; EXPRESSION; INJURIES; CONDUITS; REPAIR SO - Journal of Biomedical Materials Research Part B-Applied Biomaterials 2005 ;74B(1):589-600 13457 UI - 371 AU - Chavez-Garcia FJ AU - Luzon F AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoUniv Almeria, Dept Fis Aplicada, E-04120 Almeria, SpainLuzon, F, Univ Nacl Autonoma Mexico, Inst Ingn, Ciudad Univ, Mexico City 04510, DF, Mexico TI - On the correlation of seismic microtremors AB - [1] We present results of the analysis of microtremor measurements using a small array. Our analysis is based on the computation of cross-correlation functions between stations in both frequency and time domains. We obtain similar results in both domains and link those results to the application of Aki's spatial autocorrelation method of using a single station pair and to recent studies that have shown that the Green's function between two stations can be retrieved from the temporal cross correlation of seismic noise. We show that the same simple subsoil structure allows interpretation of our correlation results in time and frequency. We observe both Love and Rayleigh waves; however, Love waves dominate the records in our lower-frequency range ( between 3.6 and 6 Hz), while Rayleigh waves are prevalent in the records in our higher-frequency band ( from 6 to 20 Hz). Frequency domain cross correlation yields better results in the lower-frequency range, while time domain cross correlation shows very clear results in the higher-frequency band. Thus both analyses are complementary. Our results show that ambient vibration recorded at the free surface includes different types of waves but that the correlation between any two stations is governed by the more stable propagation mode between them, surface waves in the case of a layered medium. Our results shed some light on the nature of microtremors and on the reasons why the spatial autocorrelation method or the horizontal-to-vertical spectral ratios are useful in geophysical and site response studies MH - Mexico|Distrito Federal MH - Spain PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 4 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000233963500003 L2 - WAVE-VELOCITY STRUCTURE; NOISE CROSS-CORRELATION; AMBIENT NOISE; PHASE-VELOCITY; MICROSEISMS; ARRAY; EMERGENCE; VOLCANO; FIELDS; TREMOR SO - Journal of Geophysical Research-Solid Earth 2005 ;110(B11): 13458 UI - 2690 AU - Chavez-Garcia FJ AU - Rodriguez M AU - Stephenson WR AD - Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, MexicoInst Geol & Nucl Sci Ltd, Hutt, New ZealandChavez-Garcia, FJ, Univ Nacl Autonoma Mexico, Inst Ingn, Apdo Postal 70-472, Mexico City 04510, DF, Mexico TI - An alternative approach to the SPAC analysis of microtremors: Exploiting stationarity of noise AB - The SPAC (Spatial autocorrelation) method to analyze ambient vibration records was introduced by Aki (1957). Currently, this method is being used for the analysis of microtremor data from an array of stations: crosscorrelation functions are computed between pairs of stations, and then averaged for different station pairs, at the same interstation distance but with different orientation. In this article we propose the idea of exploiting recordings of microtremors over long times as a substitute for spatial averaging, as was suggested in Aki (1957). This idea has several advantages. The two most important are, first, that it is not required to obtain simultaneous recordings using an array of stations, whose locations must obey a very rigid scheme; and second, the ability to obtain results for a large number of closely-spaced distance intervals. Our proposal is tested using data from the Parkway, Wainuiomata, temporary array. These data are supplemented with additional measurements performed during February 2003, to resolve an uncertainty regarding the low-frequency part of our results. Given the irregular distribution of our array, we are able to obtain results for many different station pairs. The phase-velocity dispersion curves we derive from our measurements, interpreted with the SPAC method, are compared with previous results in this sedimentary basin. Our results suggest that the SPAC method is more general than appears in recently published papers MH - Mexico|Distrito Federal MH - New Zealand PB - EL CERRITO: SEISMOLOGICAL SOC AMER RP - NOT IN FILE U3 - TC 12 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0037-1106 UR - ISI:000228042800018 L2 - SEISMIC ARRAY; NEW-ZEALAND; WAVES; MICROSEISMS; PARKWAY; VOLCANO; TREMOR SO - Bulletin of the Seismological Society of America 2005 ;95(1):277-293 13459 UI - 1519 AU - Chavez-Gutierrez L AU - Matta E AU - Osuna J AU - Joseph-Bravo P AU - Maigret B AU - Charli JL AD - UNAM, IBT, Cuernavaca, Morelos, MexicoUniv Henri Poincare, Nancy, France TI - Homology modelling and site directed mutagenesis of pyroglutamyl peptidase II. Omega-versus amino-peptidase specificy MH - France MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 0 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Meeting Abstract AV - English IS - 0022-3042 UR - ISI:000230317200093 SO - Journal of Neurochemistry 2005 ;94():35-35 13460 UI - 3212 AU - Chavez-Gutierrez L AU - Bourdais J AU - Aranda G AU - Vargas MA AU - Matta-Camacho E AU - Ducancel F AU - Segovia L AU - Joseph-Bravo P AU - Charli JL AD - Univ Nacl Autonoma Mexico, Dept Genet Desarrollo & Fisiol Mol, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoCtr Etud Saclay, Dept Ingn & Etud Prot, F-91191 Gif Sur Yvette, FranceUniv Nacl Autonoma Mexico, Dept Ingn Celular & Biocatalisis, Inst Biotecnol, Cuernavaca 62271, Morelos, MexicoCharli, JL, Univ Nacl Autonoma Mexico, Dept Genet Desarrollo & Fisiol Mol, Inst Biotecnol, Ave Univ 2001, Cuernavaca 62271, Morelos, Mexico TI - A truncated isoform of pyroglutamyl aminopeptidase II produced by exon extension has dominant-negative activity AB - Thyrotropin-releasing hormone is inactivated in the extracellular space by a membrane-bound peptidase, pyroglutamyl aminopeptidase II (PPII), a member of the M1 family of zinc metallopeptidases. The functional significance of multiple PPII RNA species expression is unknown. We detected, in rat tissues, a RNA species derived from an alternative processing at the exon 14-intron 14 boundary. The alternatively processed RNA encoded a shorter version of PPII (PPII*), lacking part of the C-terminal domain. PPII* was expressed in COS-7 (or C6 glioma) cells but it did not exhibit any PPII activity. Co-transfection of PPII and increasing amounts of PPII* expression vectors resulted in a dose-dependent reduction in PPII activity and the formation of covalent PPII-PPII* heterodimers. PPII* is therefore a powerful dominant-negative isoform of PPII, and heterodimerization may be its mechanism of action. Natural expression of shortened versions of M1 aminopeptidases may constitute a new mode of regulation of their activity MH - France MH - Mexico|Morelos PB - OXFORD: BLACKWELL PUBLISHING LTD RP - NOT IN FILE U3 - TC 3 U4 - Biochemistry & Molecular Biology;Neurosciences U5 - J;Article AV - English IS - 0022-3042 UR - ISI:000226706600011 L2 - aminopeptidase;dominant negative;heterodimerization;pyroglutamyl aminopeptidase II;RNA splicing;thyrotropin-releasing hormone;THYROTROPIN-RELEASING-HORMONE; DEGRADING ECTOENZYME; PEPTIDASE-II; RAT-BRAIN; MICROVILLUS AMINOPEPTIDASE; ADENOHYPOPHYSEAL CELLS; PROLYL ENDOPEPTIDASE; RODENT BRAIN; SERUM ENZYME; RABBIT BRAIN SO - Journal of Neurochemistry 2005 ;92(4):807-817 13461 UI - 616 AU - Chavez-Lopez R AU - Rocha-Ramirez A AU - Alvarez F AU - Wetzer R AD - Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Ecol Lab, Tlalnepantla 54090, MexicoUniv Nacl Autonoma Mexico, Inst Biol, Colecc Nacl Crustaceos, Mexico City 04510, DF, MexicoNat Hist Museum Los Angeles, Res & Collect Crustacea, Los Angeles, CA 90007, USAChavez-Lopez, R, Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Ecol Lab, Apartado Postal 314, Tlalnepantla 54090, Mexico TI - Elthusa alvaradoensis Rocha-Ramirez, Chavez-Lopez & Bruce, 2005 (Isopoda, Cymothoidae) parasitizing the inshore lizardfish, Synodus foetens (Linnaeus, 1766) on the continental shelf off central Veracruz, Mexico AB - The prevalence, fecundity, and size distribution of the isopod, Elthusa alvaradoensis, parasitizing the inshore lizardfish, Synodus foetens on the continental shelf off central Veracruz, Mexico, were studied. A total sample of 136 fish with a 46.3% prevalence of E. alvaradoensis was obtained during a survey cruise in February, 1996. The isopods were preferentially located on the second and third branchial arches; the lesions ranged from a slight abrasion of the branchial filaments to their complete removal. Mean host size did not vary significantly between the parasitized and unparasitized fractions. Maximum total length for male parasites was 12 mm, while female size ranged from 14.5 to 26.3 mm. Parasite fecundity varied from 100 to 2280 eggs and was unrelated to female size (p < 0.05). Male parasites exhibit a positive allometric growth, while this is negative for females MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 0 U4 - Marine & Freshwater Biology U5 - J;Article AV - English IS - 0011-216X UR - ISI:000233328100008 L2 - CRUSTACEA SO - Crustaceana 2005 ;78():865-872 13462 UI - 268 AU - Chavez E AU - Figueroa K AU - Navarro G AD - Univ Michoacana, Fac Ciencias Fis & Matemat, Morelia, Michoacan, Mexico. Univ Chile, Dept Comp Sci, Ctr Web Res, Santiago, Chile TI - Proximity searching in high dimensional spaces with a proximity preserving order AB - Kernel based methods (such as k-nearest neighbors classifiers) for AI tasks translate the classification problem into a proximity search problem, in a space that is usually very high dimensional. Unfortunately, no proximity search algorithm does well in high dimensions. An alternative to overcome this problem is the use of approximate and probabilistic algorithms, which trade time for accuracy. In this paper we present a new probabilistic proximity search algorithm. Its main idea is to order a set of samples based on their distance to each element. It turns out that the closeness between the order produced by an element and that produced by the query is an excellent predictor of the relevance of the element to answer the query. The performance of our method is unparalleled. For example, for a full 128-dimensional dataset, it is enough to review 10% of the database to obtain 90% of the answers, and to review less than 1% to get 80% of the correct answers. The result is more impressive if we realize that a full 128-dimensional dataset may span thousands of dimensions of clustered data. Furthermore, the concept of proximity preserving order opens a totally new approach for both exact and approximated proximity searching MH - Chile MH - Mexico|Michoacan T3 - MICAI 2005: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - CS;Articleomputer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticleelchavez@fismat.umich.mx karina@fismat.umich.mx gnavarro@dcc.uchile.cl2HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBDJ68 AV - English IS - 0302-9743 UR - ISI:000233852000041 SO - 2005 ;():405-414 13463 UI - 2100 AU - Chavez E AU - Navarro G AD - Univ Michoacana, Escuela Ciencias Fisico Matemat, Morella 58000, Michoacan, MexicoUniv Chile, Dipartimento Ciencias Computac, Ctr Invest Web, Santiago, ChileChavez, E, Univ Michoacana, Escuela Ciencias Fisico Matemat, Edificio B,Ciudad Univ, Morella 58000, Michoacan, Mexico TI - A compact space decomposition for effective metric indexing AB - The metric space model abstracts many proximity search problems, from nearest-neighbor classifiers to textual and multimedia information retrieval. In this context, an index is a data structure that speeds up proximity queries. However, indexes lose their efficiency as the intrinsic data dimensionality increases. In this paper we present a simple index called list of clusters (LC), which is based on a compact partitioning of the data set. The LC is shown to require little space, to be suitable both for main and secondary memory implementations, and most importantly, to be very resistant to the intrinsic dimensionality of the data set. In this aspect our structure is unbeaten. We finish with a discussion of the role of unbalancing in metric space searching, and how it permits trading memory space for construction time. © 2004 Elsevier B.V. All rights reserved MH - Chile MH - Mexico|Michoacan PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 6 U4 - Computer Science, Artificial Intelligence U5 - J;Article AV - English IS - 0167-8655 UR - ISI:000229561900015 L2 - SEARCH; ALGORITHM; QUERIES; TREES SO - Pattern Recognition Letters 2005 ;26(9):1363-1376 13464 UI - 474 AU - Chavez MI AU - Andreu C AU - Vidal P AU - Aboitiz N AU - Freire F AU - Groves P AU - Asensio JL AU - Asensio G AU - Muraki M AU - Canada FJ AU - Jimenez-Barbero J AD - CSIC, Ctr Invest Biol, Dept Prot Struct & Funct, E-28040 Madrid, SpainUNAM, Inst Quim, Coyoacan, DF, MexicoUniv Valencia, Fac Farm, Dept Quim Organ, E-46100 Burjassot, SpainUniv Santiago de Compostela, Dept Quim Organ, Santiago De Compostela, SpainUnidad Asociada CSIC, RMN Biomol, Santiago De Compostela, SpainNatl Inst Adv Ind Sci & Technol, Biol Informat Res Ctr, Tsukuba, Ibaraki, JapanCanada, FJ, CSIC, Ctr Invest Biol, Dept Prot Struct & Funct, Ramiro Maeztu 9, E-28040 Madrid, Spain TI - On the importance of carbohydrate-aromatic interactions for the molecular recognition of oligosaccharides by proteins: NMR studies of the structure and binding affinity of AcAMP2-like peptides with non-natural naphthyl and fluoroaromatic residues AB - The specific interaction of a variety of modified hevein domains to chitooligosaccharides has been studied by NMR spectroscopy in order to assess the importance of aromatic-carbohydrate interactions for the molecular recognition of neutral sugars. These mutant AcAMP2-like peptides, which have 4-fluoro-phenylalanine, tryptophan, or 2-naphthylalanine at the key interacting positions, have been prepared by solid-phase synthesis. Their three-dimensional structures, when bound to the chitin-derived trisaccharide, have been deduced by NMR spectroscopy. By using DYANA and restrained molecular dynamics simulations with the AMBER 5.0 force field, the three-dimensional structures of the protein-sugar complexes have been obtained. The thermodynamic analysis of the interactions that occur upon complex formation have also been carried out. Regarding binding affinity, the obtained data have permitted the deduction that the larger the aromatic group, the hi-her the association constant and the binding enthalpy. In all cases, entropy opposes binding. In contrast, deactivation of the aromatic rings by attaching fluorine atoms decreases the binding affinity, with a concomitant decrease in enthalpy. The role of the chemical nature of the aromatic ring for establishing sugar contacts has been thus evaluated MH - Japan MH - Mexico|Distrito Federal MH - Spain PB - WEINHEIM: WILEY-V C H VERLAG GMBH RP - NOT IN FILE U3 - TC 16 U4 - Chemistry, Multidisciplinary U5 - J;Article AV - English IS - 0947-6539 UR - ISI:000233508800026 L2 - carbohydrate binding;hevein;molecular dynamics;molecular recognition;NMR spectroscopy;peptides;WHEAT-GERM-AGGLUTININ; URTICA-DIOICA AGGLUTININ; NUCLEAR-MAGNETIC-RESONANCE; N-ACETYLGLUCOSAMINE; HEVEIN DOMAINS; N,N',N''-TRIACETYL CHITOTRIOSE; 3-DIMENSIONAL STRUCTURE; DYNAMICS SIMULATIONS; AMARANTHUS-CAUDATUS; CRYSTAL-STRUCTURE SO - Chemistry-A European Journal 2005 ;11(23):7060-7074 13465 UI - 322 AU - Chazaro-Basanez M AU - Vazquez-Garcia JA AU - Vargas-Rodriguez YL AD - Univ Guadalajara, CUCSH, Dept Geog, Guadalajara 44260, Jalisco, MexicoUniv Guadalajara, Inst Bot, Dept Bot & Zool, CUCBA, Guadalajara 44260, Jalisco, MexicoLouisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803, USAChazaro-Basanez, M, Univ Guadalajara, CUCSH, Dept Geog, Ave Maestros & Mariano Barcenas, Guadalajara 44260, Jalisco, Mexico TI - Agave valenciana (Agavaceae), a gigantic new species from Jalisco, Mexico AB - Agave valenciana (Agavaceae), a new species from Jalisco, western Mexico, is described and illustrated. This species is endemic to a small section of the canyons of the Mascota and Talpa rivers. It belongs to the Agave subgenus Agave L. and to the Marmoratae species group. It appears to be closely related to A. marmorata Roezl from Puebla and Oaxaca. It differs from the latter in having a much larger rosette diameter, it has fewer but longer and wider leaves, much larger flowers, and it grows in less and environments. This discovery has implications for "raicilla" production, an alcoholic tequila-like beverage traditionally manufactured in western Jalisco, Mexico MH - Mexico|Jalisco MH - USA PB - ST LOUIS: MISSOURI BOTANICAL GARDEN RP - NOT IN FILE U3 - TC 0 U4 - Plant Sciences U5 - J;Article AV - English IS - 1055-3177 UR - ISI:000233977400003 L2 - Agave;century plant;maguey;Marmoratae;mescal;Mexico;mezcal;raicilla SO - Novon 2005 ;15(4):525-530 13466 UI - 2324 AU - Chazottes JR AU - Ugalde E AD - Ecole Polytech, CNRS, CPHT, F-91128 Palaiseau, FranceUASLP, Inst Fis, San Luis Potosi 78000, MexicoChazottes, JR, Ecole Polytech, CNRS, CPHT, F-91128 Palaiseau, France TI - Entropy estimation and fluctuations of hitting and recurrence times for Gibbsian sources AB - Motivated by entropy estimation from chaotic time series, we provide a comprehensive analysis of hitting times of cylinder sets in the setting of Gibbsian sources. We prove two strong approximation results from which we easily deduce pointwise convergence to entropy, lognormal fluctuations, precise large deviation estimates and an explicit formula for the hitting-time multifractal spectrum. It follows from our analysis that the hitting time of a n-cylinder fluctuates in the same way as the inverse measure of this n-cylinder at 'small scales', but in a different way at 'large scales'. In particular, the Renyi entropy differs from the hitting-time spectrum, contradicting a naive ansatz. This phenomenon was recently numerically observed for return times that are more difficult to handle theoretically. The results we obtain for return times, though less precise than for hitting times, complete the available ones MH - France MH - Mexico|San Luis Potosi PB - SPRINGFIELD: AMER INST MATHEMATICAL SCIENCES RP - NOT IN FILE U3 - TC 2 U4 - Mathematics, Applied U5 - J;Article AV - English IS - 1531-3492 UR - ISI:000228933600004 L2 - Renyi entropy;multifractal spectrum;exponential law;central limit theorem;large deviations;WAITING-TIMES; RETURN TIMES; MIXING PROCESSES; STATISTICS; DIMENSIONS; MAPS SO - Discrete and Continuous Dynamical Systems-Series B 2005 ;5(3):565-586 13467 UI - 3204 AU - Chazottes JR AU - Ramirez L AU - Ugalde E AD - Ecole Polytech, CNRS, CPHT, F-91128 Palaiseau, FranceIICO, San Luis Potosi 78210, MexicoChazottes, JR, Ecole Polytech, CNRS, CPHT, F-91128 Palaiseau, France TI - Finite type approximations of Gibbs measures on sofic subshifts AB - Consider a Holder continuous potential phi defined on the full shift A(N), where A is a finite alphabet. Let X subset of A(N) be a specified sofic subshift. It is well known that there is a unique Gibbs measure mu(phi) on X associated with phi. In addition, there is a natural nested sequence of subshifts of finite type (X-m) converging to the sofic subshift X. To this sequence we can associate a sequence of Gibbs measures (mu(phi)(m)). In this paper, we prove that these measures converge weakly at exponential speed to mu(phi) (in the classical distance metrizing weak topology). We also establish a mixing property that implies that mu(phi) is Bernoulli. Finally, we prove that the measure-theoretic entropy of mu(phi)(m) converges to the one of mu(phi) exponentially fast. We indicate how to extend our results to more general subshifts and potentials MH - France MH - Mexico|San Luis Potosi PB - BRISTOL: IOP PUBLISHING LTD RP - NOT IN FILE U3 - TC 0 U4 - Mathematics, Applied;Physics, Mathematical U5 - J;Article AV - English IS - 0951-7715 UR - ISI:000226787800024 L2 - SYSTEMS SO - Nonlinearity 2005 ;18(1):445-463 13468 UI - 760 AU - Chelen AAR AU - Garcia CM AU - Riebel K AD - Univ Nacl Autonoma Mexico, Dept Ecol & Evolut, Inst Ecol, Mexico City 04510, DF, MexicoLeiden Univ, Inst Biol, Behav Biol Grp, NL-2300 RA Leiden, NetherlandsChelen, AAR, Univ Nacl Autonoma Mexico, Dept Ecol & Evolut, Inst Ecol, AP 70-275,CP 04510, Mexico City 04510, DF, Mexico TI - Variation in the song of a sub-oscine, the vermilion flycatcher AB - Most Studies on song variation have focused on oscine birds, whereas sub-oscine singing has seldom been described in detail, with variation in song structure and performance rarely quantified. Yet this information is required to formulate hypotheses regarding possible coding of individuality, motivational or breeding status, and also for a more informed comparison of oscine versus sub-oscine song. To this end we recorded songs of 12 territorial males of a Central Mexican population of the vermilion flycatchers (Pyrocephalus rubinus) throughout the breeding season. We found that: (1) although all males sang only one general form of song, both song structure and performance showed substantial seasonal and inter-individual variation; (2) this variation was most pronounced in the number of introductory elements; (3) after the onset of nest construction, both the number of introductory elements and the song rate changed. We discuss some possible functions of this variation MH - Mexico|Distrito Federal MH - Netherlands PB - LEIDEN: BRILL ACADEMIC PUBLISHERS RP - NOT IN FILE U3 - TC 1 U4 - Behavioral Sciences;Zoology U5 - J;Article AV - English IS - 0005-7959 UR - ISI:000233069200007 L2 - vermilion flycatcher;sub-oscine;song variation;bird song;Tyranidae;individual variation;MYIARCHUS-CRINITUS AVES; EXTRA-PAIR PATERNITY; GREAT REED WARBLER; ACROCEPHALUS-ARUNDINACEUS; PYROCEPHALUS-RUBINUS; SEXUAL DIFFERENCES; FEMALE FERTILITY; WILLOW WARBLER; BIRD; CONSEQUENCES SO - Behaviour 2005 ;142():1115-1132 13469 UI - 931 AU - Chemsak JA AU - Noguera FA AD - Berkeley Nat Hist Museum, Essig Museum Entomol, Berkeley, CA 94720, USAIBUNAM, Estac Biol Chamela, Jalisco 48980, MexicoChemsak, JA, Berkeley Nat Hist Museum, Essig Museum Entomol, Wellman Hall, Berkeley, CA 94720 USA TI - New Mexican species of the Elaphidionine genus Aneflomorpha Casey, 1912 (Coleoptera : Cerambycidae), with a key to the Mexican species AB - New Mexican species of the elaphidionine genus Aneflomorpha Casey, 1912 are described and illustrated. New taxa include: Aneflomorpha brevipila sp. nov., Michoacan; A. exilis sp. nov., Chihuahua; A. hovorei sp. nov., Jalisco; A. longispina sp. nov., Oaxaca; A. longitudinis sp. nov., Chihuahua; A. modica sp. nov., Yucatan and Quintana Roo; A. parvipunctata sp. nov., Puebla; A. pueblae sp. nov., Puebla; A. wappesi sp. nov., Nayarit MH - USA MH - Mexico|Jalisco PB - SAN FRANCISCO: PACIFIC COAST ENTOMOL SOC RP - NOT IN FILE U3 - TC 0 U4 - Entomology U5 - J;Article AV - English IS - 0031-0603 UR - ISI:000232391300003 L2 - Insecta;Coleoptera;Cerambycidae;Aneflomorpha;Mexico;new species SO - Pan-Pacific Entomologist 2005 ;81(1-2):20-33 13470 UI - 444 AU - Chen CR AU - Larios F AU - Yuan CP AD - Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824, USACINVESTAV, Dept Fis Aplicada, Merida 97310, Yucatan, MexicoLarios, F, Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA TI - General analysis of single top production and W helicity in top decay AB - We provide a framework for the analysis of the W boson helicity in the decay of the top quark that is based on a general effective tbW coupling. Four independent coupling coefficients can be uniquely determined by the fractions of longitudinal and transverse W boson polarizations as well as the single top production rates for the t-channel and the s-channel processes. The knowledge of these coefficients can be used to discriminate models of electroweak symmetry breaking. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Yucatan MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 9 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0370-2693 UR - ISI:000233685100005 L2 - QUARK; COUPLINGS; PHYSICS; BOSON; MODEL SO - Physics Letters B 2005 ;631(3):126-132 13471 UI - 3193 AU - Chen CY AU - Dong SH AD - Yancheng Teachers Coll, Dept Phys, Yancheng 224002, Peoples R ChinaInst Mexicano Petr, Programa Ingn Mol, Mexico City 07730, DF, MexicoChen, CY, Yancheng Teachers Coll, Dept Phys, Yancheng 224002, Peoples R China TI - Exactly complete solutions of the Coulomb potential plus a new ring-shaped potential AB - A new exactly solvable ring-shaped potential is proposed. The energy eigenvalues and eigenfunctions of the bound states for the Schrodinger equation with this potential are presented analytically. The exact solutions of the continuous states of this quantum system are also obtained. The calculation formula of phase shifts is derived. Analytical properties of the scattering amplitude are discussed. We find that the energy of the particle and the radial wave functions of continuous states reduce to the energy eigenvalues and the radial wave functions of the bound states at the poles of the scattering amplitude. (C) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 12 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0375-9601 UR - ISI:000226892200006 L2 - bound states;continuous states;scattering amplitudes;ring-shaped potential;NONBIJECTIVE CANONICAL TRANSFORMATION; PATH-INTEGRAL SOLUTION; RADIAL AVERAGE VALUES; EXPLICIT EXPRESSIONS; INVARIANCE ALGEBRA; HIDDEN SYMMETRY; OSCILLATOR; PARTICLE; MOTION; SUPERSYMMETRY SO - Physics Letters A 2005 ;335(5-6):374-382 13472 UI - 1587 AU - Chen F AU - He ZH AU - Xia XC AU - Lillemo M AU - Morris C AD - Chinese Acad Agr Sci, Inst Crop Sci, Natl Wheat Improvement Ctr, Beijing 100081, Peoples R ChinaChinese Acad Agr Sci, CIMMYT, China Off, Beijing 100081, Peoples R ChinaCIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoWashington State Univ, USDA ARS, Western Wheat Qual Lab, Pullman, WA 99164, USAHe, ZH, Chinese Acad Agr Sci, Inst Crop Sci, Natl Wheat Improvement Ctr, 12 Zhongguancun S St, Beijing 100081, Peoples R China TI - A new puroindoline b mutation present in Chinese winter wheat cultivar Jingdong 11 AB - Kernel hardness is one of the most important characteristics in determining utilization and marketing of bread wheat. Genes coding for puroindoline a and b (PINA and PINB) were located at the Ha locus and designated as Pina-D1 and Pinb-D1, respectively. The coding sequence of the Pinb gene in a Chinese winter wheat cultivar Jingdong 11 (Triticum aestivum L.) was amplified with polymerase chain reaction (PCR), and the obtained 447-by fragment sequenced from two strands, and compared with the eight known Pinb alleles. The results showed that Jingdong 11 possessed a new Pinb allele not reported previously, and was designated as Pinb-D1q. It is characterized by a single base T to G substitution, which results in a tryptophan to leucine substitution (TGG to TTG) at position 44 and is most likely the cause of hard grain texture in Jingdong 11. The characterization of Pinb-D1 alleles would be helpful in manipulating grain hardness of bread wheat in breeding programs. (c) 2005 Elsevier Ltd. All rights reserved MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - LONDON: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 10 U4 - Food Science & Technology U5 - J;Article AV - English IS - 0733-5210 UR - ISI:000230870300014 L2 - bread wheat;kernel hardness;puroindolines;Pinb mutation;GRAIN HARDNESS; GENES; FRIABILIN; TAUSCHII; QUALITY; TRAITS; BREAD SO - Journal of Cereal Science 2005 ;42(2):267-269 13473 UI - 2513 AU - Chen YC AU - Burnstein RA AU - Chakravorty A AU - Chan A AU - Choong WS AU - Clark K AU - Dukes EC AU - Durandet C AU - Felix J AU - Gidal G AU - Gu P AU - Gustafson HR AU - Ho C AU - Holmstrom T AU - Huang M AU - James C AU - Jenkins CM AU - Kaplan DM AU - Lederman LM AU - Leros N AU - Longo MJ AU - Lopez F AU - Lu LC AU - Luebke W AU - Luk KB AU - Nelson KS AU - Parks HK AU - Perroud JP AU - Rajaram D AU - Rubin HA AU - Teng PK AU - Volk J AU - White CG AU - White SL AU - Zyla P AD - Acad Sinica, Inst Phys, Taipei 11529, TaiwanUniv Calif Berkeley, Berkeley, CA 94720, USAFermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Leon 37000, MexicoIIT, Chicago, IL 60616, USAUniv Lausanne, CH-1015 Lausanne, SwitzerlandLawrence Berkeley Natl Lab, Berkeley, CA 94720, USAUniv Michigan, Ann Arbor, MI 48109, USAUniv S Alabama, Mobile, AL 36688, USAUniv Virginia, Charlottesville, VA 22904, USAChen, YC, Acad Sinica, Inst Phys, Taipei 11529, Taiwan TI - Measurement of the a asymmetry parameter for the Omega(-) -> Lambda K- decay AB - We have measured the a parameter of the Omega(-) -> Lambda K- decay using data collected with the HyperCP spectrometer during the 1997 fixed-target run at Fermilab. Analyzing a sample of 0.96 x 10(6) Omega(-) -> Lambda K-, Lambda -> p pi(-) decays, we obtain an alpha(Omega)alpha(Lambda) = [1.33 +/- 0.33(stat) +/- 0.52(syst)] 10(-2). With the accepted value of alpha(Lambda), alpha(Omega) an is found to be [2.07 +/- 0.51(stat) +/- 0.81(syst)] x 10(-2) MH - Mexico|Guanajuato MH - Switzerland MH - Taiwan MH - USA PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Astronomy & Astrophysics;Physics, Particles & Fields U5 - J;Article AV - English IS - 0556-2821 UR - ISI:000228490000002 L2 - HYPERON; LIFETIME; SPIN SO - Physical Review D 2005 ;71(5): 13474 UI - 1256 AU - Chepfer H AU - Noel V AU - Minnis P AU - Baumgardner D AU - Nguyen L AU - Raga G AU - Mcgill MJ AU - Yang P AD - Ecole Polytech, Meteorol Dynam Lab, Inst Pierre Simon Laplace, F-91128 Palaiseau, FranceAnalyt Serv & Mat Inc, Hampton, VA 23666, USANASA, Langley Res Ctr, Hampton, VA 23681, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, MexicoNASA, Goddard Space Flight Ctr, Greenbelt, MD 20771, USATexas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843, USAChepfer, H, Ecole Polytech, Meteorol Dynam Lab, Inst Pierre Simon Laplace, F-91128 Palaiseau, France TI - Particle habit in tropical ice clouds during CRYSTAL-FACE: Comparison of two remote sensing techniques with in situ observations AB - [1] Ice crystal shapes in tropical ice clouds are estimated with two different remote sensing methods and compared with measurements from an in situ cloud aerosol spectrometer ( CAS) during the Cirrus Regional Study of Tropical Anvils and Cirrus Layers - Florida Area Cirrus Experiment (CRYSTAL-FACE) campaign conducted in Florida during July 2002. The remote sensing techniques use dual-satellite reflectances and lidar linear depolarization rates. The ice crystal shape is derived from CAS measurements of forward and backscattered light from individual particles in the size range from 1 to 45 mm. The remote sensing and in situ retrievals are based on ice crystal optical models, which incorporate the scattering phase functions integrated over the collection angles used by the CAS, the view angles from dual-satellites retrievals, and the complete scattering matrix for lidar. Owing to the space and time collocation constraint between in situ and remote sensing techniques, data from only 1 day are used to evaluate the dual-satellite technique ( 11 July) and from 3 days for the lidar ( 23, 26, and 29 July). Data from 23 and 29 July are also used to compare the two remote sensing techniques. In total, 40 shape retrievals were obtained for 20 different cloud areas, allowing paired comparisons of the methods. The results show consistent particle shapes for half of the cloud areas studied. The discrepancies for the other cases can be explained by insufficient spatial-temporal collocations of the data or limitations of the CAS that constrain its range to particles <45 mu m, whereas the remote sensing techniques are influenced by particles outside the size range of the CAS MH - France MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 3 U4 - Meteorology & Atmospheric Sciences U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000231727300002 L2 - SINGLE-SCATTERING PROPERTIES; CIRRUS CLOUDS; MICROPHYSICAL PROPERTIES; RADIATIVE PROPERTIES; SATELLITE MEASUREMENTS; LIDAR DEPOLARIZATION; OPTICAL-THICKNESS; LIGHT-SCATTERING; TEMPERATURE; PHASE SO - Journal of Geophysical Research-Atmospheres 2005 ;110(D16): 13475 UI - 2916 AU - Cherednichenko KD AU - Padilla P AD - Univ Oxford St Johns Coll, Oxford OX1 3JP, EnglandIIMAS, Mexico City 04510, DF, MexicoCherednichenko, KD, Univ Oxford St Johns Coll, Oxford OX1 3JP, England TI - Derivation of the density of states for periodic operators by the method of asymptotic expansion AB - A new asymptotic approach is suggested for studying spectra of linear differential operators with periodic coefficients. The resulting formal recurrent procedure and its rigorous justification allow us to prove a classical theorem on the density of states in one dimension MH - United Kingdom MH - Mexico|Distrito Federal PB - NEW YORK: CAMBRIDGE UNIV PRESS RP - NOT IN FILE U3 - TC 0 U4 - Mathematics U5 - J;Article AV - English IS - 0013-0915 UR - ISI:000227426400004 L2 - bloch waves;density of states;asymptotics;RAPIDLY OSCILLATING DENSITY SO - Proceedings of the Edinburgh Mathematical Society 2005 ;48():51-60 13476 UI - 284 AU - Chernihovskyi A AU - Mormann F AU - Muller M AU - Elger CE AU - Baier G AU - Lehnertz K AD - Univ Bonn, Dept Epileptol, D-53105 Bonn, GermanyUniv Bonn, Helmholtz Inst Strahlen & Kernphys, D-53105 Bonn, GermanyAutonomous Univ Morelos, Fac Sci, Cuernavaca, Morelos, MexicoLehnertz, K, Univ Bonn, Dept Epileptol, Sigmund Freud Str 25, D-53105 Bonn, Germany TI - EEG analysis with nonlinear excitable media AB - The detection of patterns embedded within a complex, nonstationary, and noisy background activity is a crucial and important task in EEG analysis. The authors present a biologically inspired, analog approach to EEG analysis that is conceptually different from a variety of statistical approaches currently used. A nonlinear, excitable, spatially extended medium that is composed of diffusively coupled model neurons is considered. When EEG re cordings are applied as local perturbations to such an excitable neural tissue, the induced transient changes in the dynamics of the perturbed system can be regarded as an instantaneous characterization of transient processes in the brain reflected by the EEG, e.g., in the form of a sequence of correlated dynamical events (patterns). Nonlinear excitable media can be implemented in form of an array of locally coupled integrated analog nonlinear electrical circuits called cellular neural networks, which represent a next evolutionary step in the parallel analog computer architecture. Using cellular neural networks, the authors show that the concept of signal-induced pattern generation allows an almost instantaneous and unsupervised detection of seizure onsets in EEG recordings. In addition, they show that a cellular neural network can be trained in a supervised way to approximate the degree of synchronization in EEG recordings. The resulting pattern-recognition device may be suitable for the prediction of epileptic seizures MH - Germany MH - Mexico|Morelos PB - PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS RP - NOT IN FILE U3 - TC 5 U4 - Clinical Neurology;Neurosciences U5 - J;Review AV - English IS - 0736-0258 UR - ISI:000234230100004 L2 - nonlinear excitable media;neuron models;cellular neural networks;epilepsy;seizure detection;seizure prediction;pattern recognition;synchronization;nonlinear dynamics;time series analysis;EEG;BRAIN ELECTRICAL-ACTIVITY; CELLULAR NEURAL-NETWORKS; AUTOMATIC SEIZURE DETECTION; TEMPORAL-LOBE EPILEPSY; TIME-SERIES ANALYSIS; PHASE SYNCHRONIZATION; SCALP EEG; SPATIOTEMPORAL DYNAMICS; QUANTITATIVE-ANALYSIS; PATTERN-FORMATION SO - Journal of Clinical Neurophysiology 2005 ;22(5):314-329 13477 UI - 3653 AU - Chernov V AU - Rogalev B AU - Barboza-Flores M AD - Univ Sonora, Ctr Invest Fis, Hermosillo 83190, Sonora, MexicoInst Geochem, Irkutsk 664033, RussiaChernov, V, Univ Sonora, Ctr Invest Fis, Blvd Encinas & Rosales,Apartado Postal 5-88, Hermosillo 83190, Sonora, Mexico TI - Dose rate effect on the yield of radiation induced response with thermal fading AB - A model describing the dependences of the accumulation of thermally unstable radiation induced defects on the dose and dose rate is proposed. The model directly takes into account the track nature of the ionizing radiation represented as accumulation processes of defects in tracks averaged over a crystal volume considering various degrees of overlapping in space and time. The accumulation of the defects in the tracks is phenomenologically described. General expressions are obtained that allows radiation yield simulation of defects involving known creation and transformation processes. The cases considered, of linear accumulation (constant increment of the defects in tracks) and accumulation with saturation (complete saturation of the defects in one track), lead to a set of linear dose dependences with saturation, which are routinely used in luminescence and ESR dating. The accumulation, with increase of sensitivity in regions overlapped by two or more tracks, gave a set of dose dependences, from linear-sublinear-linear-saturation, distinctive of quartz up to linear-supralinear-linear-saturation. It is shown that the effect of the dose rate on dose dependences is determined by a dimensionless parameter a = Ptau/D-0, where P is the dose rate, tau is the defect lifetime and Do is the track dose. At a much less than 1 the dose rate influences basically the accumulation of thermally unstable defects. In the reverse case the dose dependences did not seems to be influenced by the dose rate. (C) 2004 Published by Elsevier Ltd MH - Mexico|Sonora MH - Russia PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 0 U4 - Nuclear Science & Technology U5 - J;Article AV - English IS - 1350-4487 UR - ISI:000225607800010 L2 - tracks;radiation effects in solids;luminescence and EPR dating;quartz;HEAVY CHARGED-PARTICLES; LUMINESCENCE; MODEL; DEPENDENCE; QUARTZ; THERMOLUMINESCENCE; SUPRALINEARITY; TEMPERATURE; DOSIMETRY SO - Radiation Measurements 2005 ;39(3):329-335 13478 UI - 264 AU - Chesnevar CI AU - Brena RF AU - Aguirre JL AD - Univ Lleida, Dept Comp Sci, Artificial Intelligence Res Grp, E-25001 Lleida, Spain. Tecnol Monterrey, Ctr Sistemas Inteligentes, Monterrey 64849, NL, Mexico TI - Modelling power and trust for knowledge distribution: An argumentative approach AB - Knowledge and Information distribution, which is one of the main processes in Knowledge Management, is greatly affected by power explicit relations, as well as by implicit relations like trust. Making decisions about whether to deliver or not a specific piece of information to users on the basis of a rationally justified procedure under potentially conflicting policies for power and trust relations is indeed a challenging problem. In this paper we model power relations, as well as delegation and trust, in terms of an argumentation formalism, in such a way that a dialectical process works as a decision core, which is used in combination with the existing knowledge and an information distribution system. A detailed example is presented and an implementation reported MH - Mexico|Nuevo Leon MH - Spain T3 - MICAI 2005: ADVANCES IN ARTIFICIAL INTELLIGENCELecture notes in artificial intelligence PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U4 - Computer Science, Artificial Intelligence U5 - S;Article NT - SEnglishArticlecic@eps.udl.es ramon.brena@itesm.mx jlaguirre@itesm.mx1HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANYLECT NOTE ARTIF INTELLBDJ68 AV - English IS - 0302-9743 UR - ISI:000233852000011 L2 - argumentation;reputation;knowledge distribution;multiagent systems;trust SO - 2005 ;():98-108 13479 UI - 1850 AU - Chesnevar CI AU - Brena RF AU - Aguirre JL AD - Univ Lleida, Dept Comp Sci, Artificial Intelligence Res Grp, E-25001 Lleida, SpainCtr Sistemas Inteligentes Tecnol Monterrey, Monterrey 64849, NL, MexicoChesnevar, CI, Univ Lleida, Dept Comp Sci, Artificial Intelligence Res Grp, E-25001 Lleida, Spain TI - Knowledge distribution in large organizations using Defeasible Logic Programming AB - Distributing pieces of knowledge in large, usually distributed organizations is a central problem in Knowledge and Organization Management. Policies for distributing knowledge and information are. very often incomplete, or conflict with each other. As a consequence, decision processes for information distribution may be difficult to formalize on the basis of a rationally justified procedure. This paper presents an argumentative approach to cope with the above problem based on Defeasible Logic Programming, a logic programs ming formalism for defeasible argumentation. Conflicts among policies axe solve(! on the basis of a dialectical analysis whose outcome determines to which specific users different pieces of knowledge are to be delivered MH - Mexico|Nuevo Leon MH - Spain PB - BERLIN: SPRINGER-VERLAG BERLIN RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Theory & Methods U5 - S;Article AV - English IS - 0302-9743 UR - ISI:000229965500026 L2 - knowledge management;defeasible argumentation;logic programming SO - Advances in Artificial Intelligence, Proceedings 2005 ;3501():244-256 13480 UI - 2928 AU - Chianelli RR AU - De la Rosa MP AU - Meitzner G AU - Siadati M AU - Berhault G AU - Mehta A AU - Pople J AU - Fuentes S AU - onzo-Nunez G AU - Polette LA AD - Univ Texas El Paso, MRTI, El Paso, TX 79968, USACNRS, LACCO, Poitiers, FranceSSRL, Stanford, CA, USAUNAM, Ctr Ciencias Mat Condensada, Ensenada, Baja California, MexicoCtr Invest Mat Avanzados, Chihuahua, Chih, MexicoChianelli, RR, Univ Texas El Paso, MRTI, El Paso, TX 79968, USA TI - Synchrotron and simulations techniques applied to problems in materials science: catalysts and Azul Maya pigments AB - Development of synchrotron techniques for the determination of the structure of disordered, amorphous and surface materials has exploded over the past 20 years owing to the increasing availability of high-flux synchrotron radiation and the continuing development of increasingly powerful synchrotron techniques. These techniques are available to materials scientists who are not necessarily synchrotron scientists through interaction with effective user communities that exist at synchrotrons such as the Stanford Synchrotron Radiation Laboratory. In this article the application of multiple synchrotron characterization techniques to two classes of materials defined as 'surface compounds' is reviewed. One class of surface compounds are materials like MoS2-xCx that are widely used petroleum catalysts, used to improve the environmental properties of transportation fuels. These compounds may be viewed as 'sulfide-supported carbides' in their catalytically active states. The second class of 'surface compounds' are the 'Maya blue' pigments that are based on technology created by the ancient Maya. These compounds are organic/inorganic 'surface complexes' consisting of the dye indigo and palygorskite, common clay. The identification of both surface compounds relies on the application of synchrotron techniques as described here MH - France MH - Mexico|Baja California MH - Mexico|Chihuahua MH - USA PB - COPENHAGEN: BLACKWELL MUNKSGAARD RP - NOT IN FILE U3 - TC 7 U4 - Instruments & Instrumentation;Optics;Physics, Applied U5 - J;Article AV - English IS - 0909-0495 UR - ISI:000227377200003 L2 - XAFS;WAXS;SAXS;XANES;catalysts;Maya blue;TRANSITION-METAL SULFIDES; HYDRODESULFURIZATION; RADIATION; CARBON; MODEL; MOS2 SO - Journal of Synchrotron Radiation 2005 ;12():129-134 13481 UI - 2385 AU - Choi B AU - Lotfi J AU - Ramirez JC AU - Nelson JS AD - Univ Calif Irvine, Beckman Laser Inst & Med Clin, Irvine, CA 92715, USAUniv Calif Irvine, Sch Biol Sci, Irvine, CA 92717, USAInst Nacl Astrofis Opt & Elect, Puebla, Mexico TI - Laser speckle imaging of blood flow velocity dynamics during optical clearing of rodent skin MH - Mexico|Puebla MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Surgery U5 - J;Meeting Abstract AV - English IS - 0196-8092 UR - ISI:000228066000002 SO - Lasers in Surgery and Medicine 2005 ;():1-1 13482 UI - 1791 AU - Choudhry S AU - Avila PC AU - Nazario S AU - Ung N AU - Kho J AU - Rodriguez-Santana JR AU - Casal J AU - Tsai HJ AU - Torres A AU - Ziv E AU - Toscano M AU - Sylvia JS AU - Alioto M AU - Salazar M AU - Gomez I AU - Fagan JK AU - Salas J AU - Lilly C AU - Matallana H AU - Castro RA AU - Selman M AU - Weiss ST AU - Ford JG AU - Drazen JM AU - Rodriguez-Cintron W AU - Chapela R AU - Silverman EK AU - Burchard EG AD - Univ Calif San Francisco, San Francisco Gen Hosp, Lung Biol Ctr, San Francisco, CA 94110, USAUniv Puerto Rico, Sch Med, San Juan Vet Affairs Med Ctr, San Juan, PR 00936, USAPediat Pulm Program San Juan, San Juan, PR, USABrigham & Womens Hosp, Boston, MA 02115, USAHarlem Hosp Med Ctr, Harlem Lung Ctr, New York, NY, USAColumbia Univ, New York, NY, USAInst Nacl Enfermedades Resp, Mexico City, DF, MexicoBurchard, EG, Univ Calif San Francisco, San Francisco Gen Hosp, Lung Biol Ctr, Bldg 30,5th Floor,Room 3501H,1001 Potrero Ave, San Francisco, CA 94110 USA TI - CD14 tobacco gene-environment interaction modifies asthma severity and Immunoglobulin E levels in Latinos with asthma AB - Background: A recent family-based genomewide screen revealed linkage between the 5q31 region and the diagnosis of asthma, but only in those exposed to environmental tobacco smoke (ETS). Among the candidate genes in this region is CD14. Methods: To determine whether polymorphisms in the CD14 gene are related to this gene-by-environment interaction in Latinos, we used both family-based and cross-sectional cohort analysis to test for interactions between CD14 genotypes/haplotypes, exposure to ETS, and asthma-related phenotypes in 659 Mexican and Puerto Rican families. Results: We identified 21 single nucleotide polymorphisms (SNPs) in the CD14 gene by sequencing 72 Puerto Ricans, Mexicans, and African Americans with asthma. Three SNPs, -810, -159, and +1437, were further genotyped in families with asthma. Among all subjects with asthma exposed to ETS, without regard to ethnicity, CD14 +1437 genotypes were associated with asthma severity. SNP +1437 GG or GC genotypes were significantly associated with lower baseline FEV1, using both family-based (p = 0.0009) and cross-sectional cohort (p 0.03) analyses. Subjects with asthma with the GG or GC genotypes who were exposed to ETS had mean baseline FEV1 (% predicted) values 8.6% lower than subjects not exposed to ETS (p = 0.03). As previously observed in whites, we found an interaction between plasma IgE levels, SNP -159 genotypes, and ETS exposure (p = 0.0002). The lowest IgE levels were in those subjects with the TT genotype and who were exposed to ETS regardless of ethnicity. Conclusions: Our data suggest a gene-by-environment interaction between CD14 genotypes and ETS, which affects pulmonary function and IgE levels among Latinos with asthma MH - USA MH - Mexico|Distrito Federal PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 28 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000230368400005 L2 - asthma genetics;CD14;gene-environment interaction;IgE;Latinos;tobacco;MENTHOL CIGARETTE USE; PUERTO-RICAN; PROMOTER POLYMORPHISMS; CHILDHOOD ASTHMA; ATOPIC DISEASES; PASSIVE SMOKING; SOLUBLE CD14; CHILDREN; IGE; ASSOCIATION SO - American Journal of Respiratory and Critical Care Medicine 2005 ;172(2):173-182 13483 UI - 2903 AU - Choudhry S AU - Ung N AU - Avila PC AU - Ziv E AU - Nazario S AU - Casal J AU - Torres A AU - Gorman JD AU - Salari K AU - Rodriguez-Santana JR AU - Toscano M AU - Sylvia JS AU - Alioto M AU - Castro RA AU - Salazar M AU - Gomez I AU - Fagan JK AU - Salas J AU - Clark S AU - Lilly C AU - Matallana H AU - Selman M AU - Chapela R AU - Sheppard D AU - Weiss ST AU - Ford JG AU - Boushey HA AU - Drazen JM AU - Rodriguez-Cintron W AU - Silverman EK AU - Burchard EG AD - Univ Calif San Francisco, San Francisco, CA 94143, USASan Francisco Gen Hosp, Lung Biol Ctr, San Francisco, CA 94110, USAUniv Puerto Rico, Sch Med, San Juan Vet Adm Med Ctr, San Juan, PR 00936, USAPediat Pulm Program San Juan, San Juan, PR, USABrigham & Womens Hosp, Boston, MA 02115, USAHarlem Hosp Med Ctr, Harlem Lung Ctr, New York, NY, USAColumbia Univ, New York, NY, USAInst Nacl Enfermedades Resp, Mexico City, DF, MexicoBurchard, EG, Univ Calif San Francisco, San Francisco, CA 94143, USA TI - Pharmacogenetic differences in response to albuterol between Puerto Ricans and Mexicans with asthma AB - Background: In the United States, Puerto Ricans and Mexicans have the highest and lowest asthma prevalence, morbidity, and mortality, respectively. Ethnic-specific differences in the response to drug treatment may contribute to differences in disease outcomes. Genetic variants at the beta(2)-adrenergic receptor (beta(2)AR) may modify asthma severity and albuterol responsiveness. We tested the association of beta(2)AR genotypes with asthma severity and bronchodilator response to albuterol in Puerto Ricans and Mexicans with asthma. Methods: We used both family-based and cross-sectional tests of association with 8 beta(2)AR single nucleotide polymorphisms in 684 Puerto Rican and Mexican families. Regression analyses were used to determine the interaction between genotype, asthma severity, and bronchodilator drug responsiveness. Results: Among Puerto Ricans with asthma, the arginine (Arg) 16 allele was associated with greater bronchodilator response using both family-based and cross-sectional tests (p = 0.00001-0.01). We found a strong interaction of baseline FEV1 with the Arg16Glycine (Gly) polymorphism in predicting bronchodilator response. Among Puerto Ricans with asthma with baseline FEV1 < 80% of predicted, but not in those with FEV1 > 80%, there was a very strong association between the Arg16 genotype and greater bronchodilator responsiveness. No association was observed between Arg16Gly genotypes and drug responsiveness among Mexicans with asthma. Conclusions: Ethnic-specific pharmacogenetic differences exist between Arg16Gly genotypes, asthma severity, and bronchodilator response in Puerto Ricans and Mexicans with asthma. These findings underscore the need for additional research on racial/ethnic differences in asthma morbidity and drug responsiveness MH - Mexico|Distrito Federal MH - USA PB - NEW YORK: AMER THORACIC SOC RP - NOT IN FILE U3 - TC 46 U4 - Critical Care Medicine;Respiratory System U5 - J;Article AV - English IS - 1073-449X UR - ISI:000227560100005 L2 - asthma genetics;beta(2)-adrenergic receptor gene;Latinos;pharmacogenetic;BETA(2)-ADRENERGIC RECEPTOR; GENETIC POLYMORPHISMS; ASSOCIATION; POPULATION; HAPLOTYPES; HISPANICS; GENOTYPE; CHILDREN; PROGRAM; REGION SO - American Journal of Respiratory and Critical Care Medicine 2005 ;171(6):563-570 13484 UI - 1716 AU - Chouet B AU - Dawson P AU - rciniega-Ceballos A AD - US Geol Survey, Menlo Pk, CA 94025, USAUniv Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, MexicoChouet, B, US Geol Survey, 345 Middlefield Rd,MS 910, Menlo Pk, CA 94025 USA TI - Source mechanism of Vulcanian degassing at Popocatepetl Volcano, Mexico, determined from waveform inversions of very long period signals AB - [1] The source mechanism of very long period (VLP) signals accompanying volcanic degassing bursts at Popocatepetl is analyzed in the 15 - 70 s band by minimizing the residual error between data and synthetics calculated for a point source embedded in a homogeneous medium. The waveforms of two eruptions ( 23 April and 23 May 2000) representative of mild Vulcanian activity are well reproduced by our inversion, which takes into account volcano topography. The source centroid is positioned 1500 m below the western perimeter of the summit crater, and the modeled source is composed of a shallow dipping crack ( sill with easterly dip of 10 degrees) intersecting a steeply dipping crack ( northeast striking dike dipping 83 degrees northwest), whose surface extension bisects the vent. Both cracks undergo a similar sequence of inflation, deflation, and reinflation, reflecting a cycle of pressurization, depressurization, and repressurization within a time interval of 3 - 5 min. The largest moment release occurs in the sill, showing a maximum volume change of 500 - 1000 m(3), pressure drop of 3 - 5 MPa, and amplitude of recovered pressure equal to 1.2 times the amplitude of the pressure drop. In contrast, the maximum volume change in the dike is less ( 200 - 300 m 3), with a corresponding pressure drop of 1 - 2 MPa and pressure recovery equal to the pressure drop. Accompanying these volumetric sources are single-force components with magnitudes of 10(8) N, consistent with melt advection in response to pressure transients. The source time histories of the volumetric components of the source indicate that significant mass movement starts within the sill and triggers a mass movement response in the dike within a few seconds. Such source behavior is consistent with the opening of a pathway for escape of pent-up gases from slow pressurization of the sill driven by magma crystallization. The opening of this pathway and associated rapid evacuation of volcanic gases induces the pressure drop. Pressure recovery in the magma filling the sill is driven by diffusion of gases from the resulting supersaturated melt into bubbles. Assuming a penny-shaped crack at ambient pressure of 40 MPa, the observed pressure and volume variations can be modeled with the following attributes: crack radius ( 100 m), crack aperture ( 5 m), bubble number density (10(10) - 10(12) m(-3)), initial bubble radius (10(-6) m), final bubble radius (similar to 10(-5) m), and net decrease of gas concentration in the melt (0.01 wt %) MH - USA MH - Mexico|Distrito Federal PB - WASHINGTON: AMER GEOPHYSICAL UNION RP - NOT IN FILE U3 - TC 10 U4 - Geochemistry & Geophysics U5 - J;Article AV - English IS - 0148-0227 UR - ISI:000230641600003 L2 - BAND SEISMIC OBSERVATIONS; MOUNT EREBUS VOLCANO; STROMBOLI VOLCANO; SAKURAJIMA VOLCANO; ASO VOLCANO; JAPAN; EXPLOSIONS; ERUPTIONS; MAGMA; EARTHQUAKES SO - Journal of Geophysical Research-Solid Earth 2005 ;110(B7): 13485 UI - 587 AU - Choukan R AU - Warburton ML AD - CIMMYT, Int Maize & Wheat Improvement Ctr, Mexico City 06600, DF, MexicoSeed & Plant Improvement Inst, Karaj 411931585, IranWarburton, ML, CIMMYT, Int Maize & Wheat Improvement Ctr, Apdo Postal 6-641, Mexico City 06600, DF, Mexico TI - Use of SSR data to determine relationships among early maturing Iranian maize inbred lines AB - Information on germplasm diversity and relationships among elite materials is fundamentally important in hybrid crop improvement. Maize (Zea mays L.) is a crop of major economic importance in Iran, but most hybrids are developed in Iran by using inbreds extracted from hybrids introduced from other countries. Pedigree and genetic information is often lacking for these inbreds. The objective of this study was to determine the level of genetic diversity within and relationships among the most commonly used Iranian maize inbred lines using simple sequence repeat (SSR) markers. Thirty-six Iranian inbred lines and two lines from the international Maize and Wheat Improvement Center (CIMMYT) were fingerprinted with 43 SSR markers. A total of 194 alleles, moderate levels of diversity, and a high number of unique alleles were found in these lines. UPGMA Clustering grouped the Iranian inbreds into four clusters and the two CIMMYT lines formed a separate and more distant cluster. Clustering was consistent with the known information about source materials. The highest distance was found between the CIMMYT lines and the cluster containing the Lancaster Sure Crop related lines. The genetic distance information may be used by breeders when planning future crosses among these inbred lines MH - Iran MH - Mexico|Distrito Federal PB - BERGAMO: MAYDICA-IST SPER CEREALICOLTUR RP - NOT IN FILE U3 - TC 0 U4 - Agronomy;Plant Sciences U5 - J;Article AV - English IS - 0025-6153 UR - ISI:000233355000011 L2 - maize (Zea mays L.);Iran;simple sequence repeats;ZEA-MAYS L; GENETIC DIVERSITY; HETEROTIC GROUPS; MOLECULAR MARKERS; COMBINING ABILITY; TROPICAL MAIZE; RFLPS; POPULATIONS; REPEATS; UTILITY SO - Maydica 2005 ;50(2):163-170 13486 UI - 415 AU - Chowell G AU - Hyman JM AU - az-Duenas P AU - Hengartner NW AD - Los Alamos Natl Lab, Los Alamos, NM 87545, USAIMSS, Colima, MexicoChowell, G, Los Alamos Natl Lab, Los Alamos, NM 87545, USA TI - Predicting scorpion sting incidence in an endemic region using climatological variables AB - Scorpionism is a public health problem in several regions of the world. The highest mortality, with over 1000 deaths per year, has been reported in Mexico. We analysed the significance of climatological variables to predict the incidence of scorpion stings in humans in the state of Colima (Mexico) for the years 2000 - 2001. The pluvial precipitation (mm), the evaporation (mm), and the mean, maximum, and minimum temperatures (degrees C) were obtained from local meteorological offices. There are approximately 3 stings/year per 1000 people in municipalities of Colima and Villa de Alvarez and about 18 - 30 stings/year per 1000 people in the rest of the municipalities. There is very little rain and there are few stings in the winter when the minimum temperature is below about 16 degrees C. The number of scorpion stings is independent of the actual rainfall when this is above 30 mm/month. Using multiple linear regression, we used a backward model selection procedure to estimate that the minimum temperature is correlated with scorpion sting incidence with a statistically significance of 95%. We briefly discuss the application of predictive models of scorpion sting incidence in the appropriate allocation of antivenom serum in hospital clinics MH - Mexico|Colima MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 3 U4 - Environmental Sciences;Public, Environmental & Occupational Health U5 - J;Article AV - English IS - 0960-3123 UR - ISI:000233852600003 L2 - scorpion;climate;temperature;rainfall;correlation;MEXICO SO - International Journal of Environmental Health Research 2005 ;15(6):425-435 13487 UI - 438 AU - Chowell G AU - az-Duenas P AU - Chowell D AD - Los Alamos Natl Lab, Los Alamos, NM 87545, USAInst Mexicano Seguro Social, Hosp Gen Med Familiar 5, Colima, MexicoUniv Colima, Sch Sci, Colima, MexicoChowell, G, Los Alamos Natl Lab, Mail Stop B284, Los Alamos, NM 87545 USA TI - The dynamics of pulmonary tuberculosis in Colima, Mexico (1999-2002) AB - Tuberculosis is a public health problem in Mexico. From 1999 to 2002, we assessed retrospectively the epidemiological, clinical, and treatment characteristics of pulmonary tuberculosis in the hospitals of the Mexican Institute of Public Health in the state of Colima (Mexico). We included 184 cases diagnosed with pulmonary tuberculosis. A database containing demographic, epidemiological, and clinical information was constructed and analyzed. We estimate a median patient delay of 83 d and a mean treatment delay of 2.3 d. Of 14 cases suspected for multiresistance and microbiologically assayed, 5 were found to carry a multi-drug-resistant strain. We also found a significant association between a short patient delay and the presence of hemoptysis (p = 0.002) or dyspnea (p < 0.001). 86 patients (46.8%) were sputum smear microscopy negative at the end of treatment and 40 (21.7%) completed treatment giving an overall success rate of 68.5%, which compares unfavorably with the World Health Organization target success rate of 85%. Five (2.7%) patients failed treatment, 10 (5.4%) died, 39 (21.2%) interrupted treatment, and 4 (2.2%) transferred to another reporting unit. A 2002 strategic change in drug distribution seemed to prove successful MH - Mexico|Colima MH - USA PB - OSLO: TAYLOR & FRANCIS AS RP - NOT IN FILE U3 - TC 0 U4 - Infectious Diseases U5 - J;Article AV - English IS - 0036-5548 UR - ISI:000233618800010 L2 - DIAGNOSTIC DELAY; HEALTH SO - Scandinavian Journal of Infectious Diseases 2005 ;37(11-12):858-862 13488 UI - 129 AU - Christen JA AU - Fox C AD - CIMAT, Guanajuato 36240, MexicoUniv Auckland, Dept Math, Auckland 90219, New ZealandChristen, JA, CIMAT, Jaliso S-N, Guanajuato 36240, Mexico TI - Markov chain Monte Carlo using an approximation AB - This article presents a method for generating samples from an unnormalized posterior distribution f((.)) using Markov chain Monte Carlo (MCMC) in which the evaluation of f((.)) is very difficult or computationally demanding. Commonly, a less computationally demanding, perhaps local, approximation to f((.)) is available, say f*(x)((.)). An algorithm is proposed to generate an MCMC that uses such an approximation to calculate acceptance probabilities at each step of a modified Metropolis-Hastings algorithm. Once a proposal is accepted using the approximation, f((.)) is calculated with full precision ensuring convergence to the desired distribution. We give sufficient conditions for the algorithm to converge to f((.)) and give both theoretical and practical justifications for its usage. Typical applications are in inverse problems using physical data models where computing time is dominated by complex model simulation. We outline Bayesian inference and computing for inverse problems. A stylized example is given of recovering resistor values in a network from electrical measurements made at the boundary. Although this inverse problem has appeared in studies of underground reservoirs, it has primarily been chosen for pedagogical value because model simulation has precisely the same computational structure as a finite element method solution of the complete electrode model used in conductivity imaging, or "electrical impedance tomography." This example shows a dramatic decrease in CPU time, compared to a standard Metropolis-Hastings algorithm MH - Mexico|Guanajuato MH - New Zealand PB - ALEXANDRIA: AMER STATISTICAL ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Statistics & Probability U5 - J;Article AV - English IS - 1061-8600 UR - ISI:000235042100003 L2 - conductivity imaging;impedance tomography;inverse problems;ELECTRICAL-IMPEDANCE TOMOGRAPHY; METROPOLIS-HASTINGS; ULTRASOUND; INVERSION; MODEL SO - Journal of Computational and Graphical Statistics 2005 ;14(4):795-810 13489 UI - 929 AU - Christian DC AU - Felix J AU - Gottschalk EE AU - Gutierrez G AU - Hartouni EP AU - Knapp BC AU - Kreisler MN AU - Moreno G AU - Reyes MA AU - Sosa M AU - Wang MHLS AU - Wehmann A AD - Fermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Guanajuato, Guanajuato 37150, MexicoLawrence Livermore Natl Lab, Livermore, CA 94551, USAColumbia Univ, Nevis Lab, Irvington, NY 10533, USAUniv Massachusetts, Amherst, MA 01003, USAChristian, DC, Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA TI - Search for exotic baryons in 800 GeV pp -> p Xi(+/-) pi(+/-) X reactions AB - We report the results of a high-statistics, sensitive search for narrow baryon resonances decaying to Xi(-)pi(-), Xi(-)pi(+), (Xi) over bar (+)pi(-), and (Xi) over bar (+)pi(+). The only resonances observed are the well known Xi(0)(1530) and (Xi) over bar (0)(1530). No evidence is found for the states near 1862 MeV, previously reported by NA49 [Phys. Rev. Lett. 92, 042003 (2003)]. At the 95% confidence level, we find the upper limit for the production of a Gaussian enhancement with sigma=7.6 MeV in the Xi(-)pi(-) effective mass spectrum to be 0.3% of the number of observed Xi(0)(1530)->Xi(-)pi(+). We find similarly restrictive upper limits for an enhancement at 1862 MeV in the Xi(-)pi(+), (Xi) over bar (+)pi(-), and (Xi) over bar (+)pi(+) mass spectra MH - USA MH - Mexico|Guanajuato PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 5 U4 - Physics, Multidisciplinary U5 - J;Article AV - English IS - 0031-9007 UR - ISI:000232443400020 L2 - DEEP-INELASTIC SCATTERING; POSITIVE-STRANGENESS; PENTAQUARK; PHOTOPRODUCTION; RESONANCE; STATE; HERA SO - Physical Review Letters 2005 ;95(15): 13490 UI - 1022 AU - Chudinovich I AU - Constanda C AU - Venegas JC AD - Univ Tulsa, Dept Math & Comp Sci, Tulsa, OK 74104, USAUniv Guanajuato, Dept Mech Engn, Salamanca, MexicoConstanda, C, Univ Tulsa, Dept Math & Comp Sci, Tulsa, OK 74104, USA TI - Solvability of initial-boundary value problems for bending of thermoelastic plates with mixed boundary conditions AB - Initial-boundary value problems for bending of a thermoelastic plate with transverse shear deformation are studied under the assumption that various parts of the boundary are subjected to different types of physical conditions. The unique solvability of these problems is established in spaces of distributions by means of a combination of the Laplace transform and variational methods. (c) 2005 Elsevier Inc. All rights reserved MH - Mexico|Guanajuato MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Mathematics, Applied;Mathematics U5 - J;Article AV - English IS - 0022-247X UR - ISI:000232236100026 L2 - thermoelastic plate;initial-boundary value problem;unique solvability;variational method;INTEGRAL-EQUATIONS; ELASTIC PLATES SO - Journal of Mathematical Analysis and Applications 2005 ;311(1):357-376 13491 UI - 2161 AU - Chudinovich I AU - Constanda C AU - Dolberg O AD - Univ Guanajuato, Dept Mech Engn, Salamanca, MexicoUniv Tulsa, Dept Math & Comp Sci, Tulsa, OK 74104, USAInt Solomon Univ, Kharkov, UkraineConstanda, C, Univ Guanajuato, Dept Mech Engn, Tampico 912,Col Bellavista CP 36730, Salamanca, Mexico TI - On the Laplace transform of a matrix of fundamental solutions for thermoelastic plates AB - The Laplace transform D(x, h) of a matrix D(x, t) of fundamental solutions for the partial differential operator describing, the time-dependent bending of thermoelastic plates with transverse shear deformation is constructed, and its asymptotic behavior near the origin is investigated. The differential system is reduced to an algebraic one through the application of the Laplace and then Fourier transformations, and all possible cases of roots of the determinant of the latter system are considered. It is shown that in every case, the asymptotic expansion of D(x, p) near tie origin has the same dominant term. This is an important step in the construction of boundary-element methods for the above time-dependent model because it determines the nature of the singularity of the kernel of the boundary-integral-equations associated with various initial-boundary-value problems for the governing system MH - Mexico|Guanajuato MH - Ukraine MH - USA PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 2 U4 - Engineering, Multidisciplinary;Mathematics, Interdisciplinary Applications U5 - J;Article AV - English IS - 0022-0833 UR - ISI:000229314800002 L2 - asymptotic behavior;fundamental solutions;thermoelastic plates SO - Journal of Engineering Mathematics 2005 ;51(3):199-209 13492 UI - 2025 AU - Chung CB AU - Isaza IL AU - Angulo M AU - Boucher R AU - Hughes T AD - Univ Calif San Diego, Dept Radiol, La Jolla, CA 92161, USAVet Affairs Healthcare Syst, La Jolla, CA 92161, USACT Scanner Mexico, Colonia Roma 06700, MexicoFdn Clin Med Sur, Delegac Tlalpan, MexicoUSN, Med Ctr, San Diego, CA 92134, USAChung, CB, Univ Calif San Diego, Dept Radiol, 3350 La Jolla Village Dr, La Jolla, CA 92161 USA TI - MR arthrography of the knee: How, why, when AB - MR arthrography combines the techniques of arthrography with MR imaging to benefit from the added imaging information afforded by intra-articular distention. This article reviews technical considerations for MR arthrography, potential complications, indications, pitfalls in imaging diagnosis, and commonly encountered pathology. It is an elegant study that can offer precise diagnostic information in the appropriate clinical setting MH - USA MH - Mexico|Distrito Federal PB - PHILADELPHIA: W B SAUNDERS CO RP - NOT IN FILE U3 - TC 4 U4 - Radiology, Nuclear Medicine & Medical Imaging U5 - J;Article AV - English IS - 0033-8389 UR - ISI:000229690600009 L2 - ANTERIOR CRUCIATE LIGAMENT; INTRAARTICULAR CONTRAST MATERIAL; SPIRAL CT ARTHROGRAPHY; ARTICULAR-CARTILAGE; POPLITEAL ARTERY; MENISCAL TEARS; GADOPENTETATE DIMEGLUMINE; OSTEOCHONDROSIS DISSECANS; POSTOPERATIVE MENISCUS; PARTIAL MENISCECTOMY SO - Radiologic Clinics of North America 2005 ;43(4):733-+ 13493 UI - 1212 AU - Cicirata F AU - Zappala A AU - Serapide MF AU - Parenti R AU - Panto MR AU - Paz C AD - Dipartimento Sci Fisiol, I-95125 Catania, ItalyInst Nacl Neurol & Neurocirugia MVS, Dept Neurofisiol, Mexico City 14269, DF, MexicoCicirata, F, Dipartimento Sci Fisiol, Viale A Doria 6, I-95125 Catania, Italy TI - Different pontine projections to the two sides of the cerebellum AB - This study analyzed the projections of the basilar pontine nuclei (BPN) and of the nucleus reticularis tegmenti pontis (NRTP) to the two sides of the cerebellum in the rat. It showed that the two sides of the cerebellar cortex were innervated by different percentages of BPN (about 82% of the cells project to the contralateral cortex and 18% to the ipsilateral) and NRTP cells (some 60% project to the contralateral cortex and 40% to the ipsilateral). In comparison to projections traced to the cortex, only a few fibers were traced to the nuclei of the same animals. Most of the projections of the BPN to the cerebellar nuclei were traced to the lateralis and posterior interpositus nucleus of the contralateral side (95%), while a few were traced to homologous nuclei of the ipsilateral side (5%). Thus, the BPN principally control the activity of the contralateral cerebellum, with a much less important control over the activity of the ipsilateral cerebellum. Vice versa, the NRTP, which project to the lateralis, interpositus, and medialis nuclei of the two sides, with percentages (64% contra- and 36% ipsilateral) similar to those reported for the projections to the cortex, is more concerned in the bilateral control of the cerebellum, although with a moderate contralateral prevalence. The fact that projections of the BPN were principally traced to the contralateral nuclei, from which the efferent projection fibers from the cerebellum originate, suggests that the BPN are principally involved in the motor control of the contralateral body. Conversely, the bilateral projections of the NRTP to the cerebellar nuclei suggest that the NRTP is mainly involved in bilateral motor activities. The comparison of the projections to the cortex and nuclei of the cerebellum of single animals supports the co-existence of coupled (i.e., projections to the cortex and the corresponding nuclei) and uncoupled (i.e., projections to the cortex but not to the nuclei) projection patterns, from both the BPN and the NRTP. These features of the pontocerebellar projections open new vistas on the functional architecture of this pathway. (c) 2005 Elsevier B.V. All rights reserved MH - Italy MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Neurosciences U5 - J;Article AV - English IS - 0165-0173 UR - ISI:000231870200018 L2 - cerebellum;BPN;NRTP;neuroanatomy;rat;RETICULARIS-TEGMENTI PONTIS; MULTIPLE ZONAL PROJECTIONS; LATERAL VESTIBULAR NUCLEUS; PONTOCEREBELLAR SYSTEM; HORSERADISH-PEROXIDASE; CAT CEREBELLUM; TOPOGRAPHICAL ORGANIZATION; THALAMIC PROJECTIONS; RAT; CORTEX SO - Brain Research Reviews 2005 ;49(2):280-294 13494 UI - 2031 AU - Cintra-Buenrostro CE AU - Flessa KW AU - vila-Serrano G AD - Univ Arizona, Dept Geosci, Tucson, AZ 85721, USAUniv Autonoma Baja California, Fac Ciencias Marinas, Ensenada, Baja California, MexicoCintra-Buenrostro, CE, Univ Arizona, Dept Geosci, Tucson, AZ 85721, USA TI - Who cares about a vanishing clam? Trophic importance of Mulinia coloradoensis inferred from predatory damage AB - Analyses of predatory damage on subfossil hard parts can be used to document the trophic role played by species that were abundant prior to human impact even when pre-impact surveys are lacking or when predators have not left skeletal remains. Before upstream dams and water diversions, the bivalve Mulinia coloradoensis was the most common mollusk inhabiting the Colorado River Estuary. Today, only a small population has survived the environmental changes caused by reduction in the river's flow. When abundant, this species was a major source of food for predatory gastropods and crabs, as shown by the characteristic damage inflicted by these predators. Boreholes made by predatory gastropods were found in 23% of the 600 individuals sampled from shell accumulations that date from the era prior to upstream dams and diversions. Marginal shell damage characteristic of predatory portunid crabs was found in 27% of the individuals. Thirty-four percent of the individuals had damage from earlier attacks. Shells were tumbled to provide criteria to distinguish ante-mortem biological damage to the shell margin from post-mortem physical damage. Decline in the population of this prey species likely caused a decline in the populations of its predators and species higher in the food chain, prey-switching, or both effects. Restoration of river flow would increase populations of M. coloradoensis and species that depend on it for food, including commercially important crabs MH - Mexico|Baja California MH - USA PB - TULSA: SEPM-SOC SEDIMENTARY GEOLOGY RP - NOT IN FILE U3 - TC 2 U4 - Geology;Paleontology U5 - J;Article AV - English IS - 0883-1351 UR - ISI:000229704200008 L2 - GULF-OF-CALIFORNIA; SHELL FRAGMENTATION; DRILLING PREDATION; NATICID GASTROPODS; FOSSIL RECORD; RIVER; BIVALVES; TIME; ESCALATION; PATTERNS SO - Palaios 2005 ;20(3):296-302 13495 UI - 2381 AU - Cisneros MM AU - Lopez HF AU - Mancha H AU - Rincon E AU - Vazquez D AU - Perez MJ AU - De La Torre SD AD - Inst Tecnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, MexicoUniv Wisconsin, Dept Mat Engn, Milwaukee, WI 53201, USACINVESTAV, Saltillo 663, Coahuila, MexicoCIITec IPN, Ctr Inv & Innov Tec, Azcapotzalco, DF, MexicoCisneros, MM, Inst Tecnol Saltillo, Dept Met Mecan, Saltillo 25280, Coahuila, Mexico TI - Processing of nanostructured high nitrogen stainless steel by mechanical alloying AB - Mechanical alloying (MA) was employed to process high nitrogen nanostructural stainless steel from Fe-18 pct Cr-11 pct Mn powder mixtures. Two MA processing units were employed, a Szegvary attritor and a high energy Spex mill, with stainless steel balls under a nitrogen atmosphere. The level of nitrogen introduced by these means was relatively high (around 5 pct), which easily exceeded the equilibrium solubility limits in either the alpha or gamma phase. The relatively high nitrogen concentration in solid solution was attributed to preferential accommodation at dislocation elastic stress fields, as well as at nanograin boundaries. Moreover, it was found that MA in the attritor produced a maximum of 29.4 pct austenite after 72 hours of milling time. In contrast, almost 100 pct austenite was obtained by MA for 120 hours in the Spex mill. The development of a fully austenitic structure was attributed to the high energy associated with the Spex mill during the MA of these powders. Apparently, under these conditions, the interfacial energy contributions associated with the nanograin structure thermodynamically favor the formation of the gamma phase below a critical nanograin size. The resultant grain structure obtained from both MA processes was nanometric with grain sizes well below 10 nm. In the MA powder mixtures processed in the attritor, the powders were subsequently annealed to promote the alpha -> gamma transformation. In this case, it was found that almost 100 pct austenite was produced by annealing at 1000 degrees C to 1100 degrees C for 60 minutes in MA powder mixtures processed for 72 hours. Longer MA processing times gave rise to the development of either the CrN or Cr2N phase upon annealing. Alternatively, using spark plasma sintering at 800 degrees C and 1000 degrees C for 7 minutes led to almost full densification with maximum amounts of austenite of the order of 95 pet. It was found that either sintering or powder annealing at the mentioned temperatures did not give rise to significant nanograin growth, with the nanograin sizes remaining between 14.5 and 48.8 nm. Apparently, the nanograin boundaries are pinned by preferential nitrogen segregation, making grain boundary (GB) migration rather sluggish in this alloy system MH - Mexico|Coahuila MH - Mexico|Distrito Federal MH - USA PB - WARRENDALE: MINERALS METALS MATERIALS SOC RP - NOT IN FILE U3 - TC 0 U4 - Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering U5 - J;Article AV - English IS - 1073-5623 UR - ISI:000228797500024 L2 - AUSTENITIC STEELS; IRON; TRANSFORMATION; CORROSION; POWDERS SO - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 2005 ;36A(5):1309-1316 13496 UI - 3198 AU - Civitarese O AU - Reboiro M AU - Hirsch JG AD - Univ La Plata, Dept Phys, RA-1900 La Plata, ArgentinaUNAM, Inst Ciencias Nucl, Mexico City 04510, DF, MexicoCivitarese, O, Univ La Plata, Dept Phys, Cc 67, RA-1900 La Plata, Argentina TI - Test of consistency of the so-called fully renormalized quasiparticle random phase approximation AB - The validity of the so-called fully renormalized quasiparticle random phase approximation is tested, under schematic model conditions. It is shown that this approximation does not fulfill the consistency required by the linealization procedure. The results are illustrated by the analysis of Fermi-type transitions MH - Argentina MH - Mexico|Distrito Federal PB - COLLEGE PK: AMERICAN PHYSICAL SOC RP - NOT IN FILE U3 - TC 2 U4 - Physics, Nuclear U5 - J;Article AV - English IS - 0556-2813 UR - ISI:000226701900024 L2 - DOUBLE-BETA-DECAY; GROUND-STATE CORRELATIONS; HEAVY SPHERICAL NUCLEI; TRANSITIONS; SUPPRESSION; SPACE; MODEL; RPA SO - Physical Review C 2005 ;71(1): 13497 UI - 193 AU - Clark GG AU - Martinez HQ AD - Ctr Dis Control & Prevent, Dengue Branch, San Juan, PR 00920, USAUniv Autonoma Nuevo Leon, Fac Ciencias Biol, Entomol Lab, San Nicolas De Los Garza, Nuevo Leon, MexicoClark, GG, Ctr Dis Control & Prevent, Dengue Branch, 1324 Calle Caflada, San Juan, PR 00920 USA TI - Mosquito vector control and biology in Latin America - A 15th symposium MH - Mexico|Nuevo Leon MH - USA PB - EATONTOWN: AMER MOSQUITO CONTROL ASSOC RP - NOT IN FILE U3 - TC 2 U4 - Entomology U5 - J;Article AV - English IS - 8756-971X UR - ISI:000234573900012 L2 - mosquitoes;dengue;malaria;mosquito control;bionomics;Aedes;Anopheles;Boophilus;Culex;Lutzomyia;Rhodnius;Triatoma SO - Journal of the American Mosquito Control Association 2005 ;21(4):412-424 13498 UI - 130 AU - Clark P AU - Deleze M AU - Cons-Molina F AU - Salmeron J AU - Ragi S AU - Palermo L AU - Cummings SR AD - UNAM, IMSS, Fac Med, Clin Epidemiol Unit, Mexico City, DF, MexicoClin Osteoporosis, Puebla, MexicoUnidad Diagnost Osteoporosis, Mexicali, Baja California, MexicoCEDOES, Vitoria, BrazilUniv Calif San Francisco, Coordinating Ctr, San Francisco, CA 94143, USACPMC, Res Inst, SF Coordinating Ctr, San Francisco, CA, USA TI - The prevalence of vertebral fractures in Mexican men over 50 years. A population-based study MH - Brazil MH - Mexico|Baja California MH - Mexico|Distrito Federal MH - Mexico|Puebla MH - USA PB - WASHINGTON: AMER SOC BONE & MINERAL RES RP - NOT IN FILE U3 - TC 0 U4 - Endocrinology & Metabolism U5 - J;Meeting Abstract AV - English IS - 0884-0431 UR - ISI:000233503805051 SO - Journal of Bone and Mineral Research 2005 ;20(9):S381-S381 13499 UI - 254 AU - Clark P AU - Lavielle P AU - Franco-Marina F AU - Ramirez E AU - Salmeron J AU - Kanis JA AU - Cummings SR AD - Univ Calif San Diego, Sch Med, Dept Family & Prevent Med, La Jolla, CA 92093, USAUNAM, Clin Epidemiol Unit, CMN Siglo XXI IMSS, Fac Med, Mexico City, DF, MexicoCtr Nacl Rehabil SS, Mexico City, DF, MexicoMorelos IMSS, Epidemiol & Hlth Serv Res Unit, Cuernavaca, Morelos, MexicoUniv Sheffield, Sch Med, WHO Collaborating Ctr Metab Bone Dis, Sheffield, S Yorkshire, EnglandUCSF, Coordinating Ctr, San Francisco, CA, USAClark, P, Univ Calif San Diego, Sch Med, Dept Family & Prevent Med, 9500 Gilman Dr,Osler Lane,Date Bldg Room 103, La Jolla, CA 92093 USA TI - Incidence rates and life-time risk of hip fractures in Mexicans over 50 years of age: a population-based study AB - The vast majority of hip fractures in the 21st century will occur in the developing countries. The rates and life-time hip fracture risk are not known for Mexico, and for this reason, we studied the incidence of hip fractures, and the remaining life-time probability of having a hip fracture at the age of 50 years in Mexican men and women. All hip fracture cases registered during the year 2000 were collected at all the main tertiary-care hospitals in the two major health systems in Mexico City, Instituto Mexicano del Seguro Social (IMSS) and Ministry of Health (SS), and the diagnosis was validated by chart review in all cases. The annual rates of hip fracture were 169 in women and 98 in men per 100,000 person-years. The life-time probability of having a hip fracture at 50 years of age was 8.5% in Mexican women and 3.8% in Mexican men. We conclude that hip fractures are an important health problem in Mexico and that Mexican health authorities should consider public health programs to prevent hip fractures MH - USA MH - United Kingdom MH - Mexico|Distrito Federal MH - Mexico|Morelos PB - GODALMING: SPRINGER LONDON LTD RP - NOT IN FILE U3 - TC 4 U4 - Endocrinology & Metabolism U5 - J;Article AV - English IS - 0937-941X UR - ISI:000233997600076 L2 - epidemiology;hip fractures;life-time risk;Mexico;population studies;prevalence;REPUBLIC-OF-CHINA; OSTEOPOROTIC FRACTURES; URBAN; EPIDEMIOLOGY; HEALTH SO - Osteoporosis International 2005 ;16(12):2025-2030 13500 UI - 1588 AU - Clemente F AU - Riquelme E AU - Mendoza GD AU - Barcena R AU - Gonzalez S AU - Ricalde R AD - Colegio Postgrad, Programa Ganaderia Montecillo, Mexico Texcoco 56230, Edo Mexico, MexicoUniv Puerto Rico, Mayaguez, PR, USAUniv Autonoma Metropolitana, Unidad Xochimilco, Mexico City 04960, DF, MexicoMendoza, GD, Colegio Postgrad, Programa Ganaderia Montecillo, Km 36-5 Carr, Mexico Texcoco 56230, Edo Mexico, Mexico TI - Digestibility of forage diets of white-tailed deer (Odocoileus virginanus, Hays) using different ruminal fluid inocula AB - Ruminal inocula obtained from goat, cow and feral and captive deer were used to determine in vitro dry matter digestibility (IVDMD) of forages and diets consumed by white tailed deer in a temperate forest in Mexico. No differences (P > 0.05) in IVDMD were detected using different inoculum sources. The IVDMD (%) of granuneae component of diet was lower (P < 0.05) for deer ruminal fluid (feral 23.0, captive 28.0) than that from domestic ruminants (cow 31.9, goat 31.5). Correlation coefficients results using ruminal fluids from feral deer and domestic ruminants were high (0.97-0.99). The IVDMD of the forage diets varied significantly among plant groups and seasons and was 48% (summer), 32% (fall) and 29% (winter). Ruminal fluid from domestic ruminants can be used to estimate digestibility of forages consumed by feral white tailed deer MH - Mexico|Distrito Federal MH - Mexico|Estado De Mexico MH - USA PB - IZATNAGAR: GARUDA SCIENTIFIC PUBLICATIONS RP - NOT IN FILE U3 - TC 0 U4 - Agriculture, Dairy & Animal Science U5 - J;Article AV - English IS - 0971-2119 UR - ISI:000230938900002 L2 - Odocoileus virginanus;white-tailed deer;diet;digestibility;in vitro digestibility;IN-VITRO DIGESTIBILITY SO - Journal of Applied Animal Research 2005 ;27(2):71-76 13501 UI - 1178 AU - Cobas JC AU - Constantino-Castillo V AU - Martin-Pastor M AU - del Rio-Portilla F AD - Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, MexicoMestrelab Res SL, La Coruna 15706, SpainUniv Santiago de Compostela, Lab Integral Dinam & Estruct Biomol Jose R Carrac, Unidade Resonancia Magnet, RIAIDT, Santiago De Compostela 15782, Spaindel Rio-Portilla, F, Univ Nacl Autonoma Mexico, Inst Quim, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico TI - A two-stage approach to automatic determination of H-1 NMR coupling constants AB - H-1 NMR scalar coupling constants are a rich source of information on molecular structure, but their extraction from spectra can be less than straightforward. Previous approaches to J extraction include methods proposed by Hoye, Golotvin, and the 'modified J-doubling' method. Here we describe the ACCA method, currently implemented in the NMR package MestReC, which allows a high degree of automation in the extraction of coupling patterns even in the case of complex multiplets with sublinewidth splitting. The new approach is illustrated by application to strychnine, for which it has detected previously unreported couplings. Copyright (c) 2005 John Wiley & Sons, Ltd MH - Mexico|Distrito Federal MH - Spain PB - CHICHESTER: JOHN WILEY & SONS LTD RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Multidisciplinary;Chemistry, Physical;Spectroscopy U5 - J;Article AV - English IS - 0749-1581 UR - ISI:000231797400008 L2 - scalar coupling constants;NMR;modified J-doubling;pattern recognition;1ST-ORDER MULTIPLET ANALYSIS; NUCLEAR-MAGNETIC-RESONANCE; FREQUENCY-DOMAIN; PRACTICAL GUIDE; NMR-SPECTRA; DECONVOLUTION; SPECTROSCOPY; SPLITTINGS; VALUES SO - Magnetic Resonance in Chemistry 2005 ;43(10):843-848 13502 UI - 176 AU - Cobos-Marin L AU - Montes-Vargas J AU - Zumarraga M AU - Cataldi A AU - Romano MI AU - Estrada-Garcia I AU - Merchand JA AD - IPN, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, MexicoSAGARPA, CANETB, Mexico City 32320, DF, MexicoINTA, CICVyA, Inst Biotecnol, RA-1712 Castelar, ArgentinaGonzalez-y-Merchand, JA, IPN, Escuela Nacl Ciencias Biol, Dept Microbiol, Mexico City 11340, DF, Mexico TI - Spoligotype analysis of Mycobacterium bovis isolates from northern Mexico AB - Bovine tuberculosis is still rife in Latin America, producing huge economic losses. There are very few studies of the way this disease is spread through this geographical region, particularly in countries that border those that are almost free of Mycobacterium bovis. In this work, we have analyzed the spacer oligonucleotide typing (spoligotype) patterns of M. bovis isolates from cattle at Ciudad Juarez, a Mexican city close to El Paso, Texas. Fifty-eiaht M. bovis isolates collected from a herd in Northern Mexico were studied by spoligotyping. Nine spoligotype patterns were observed in total. Two were predominant (SB0121 and SB0140) and accounted for 50% and 14% of the isolates, respectively. Six patterns were found to be already described in an international M. bovis spoligotype database, while the other three (SB0985, SB0986, and SB0987) were novel. Interestingly, none of the isolates corresponded to any other Mexican pattern previously reported. This is the first spoligotype analysis of M. bovis strains from a border city between Mexico and the United States. The necessity for further studies to formulate a better identification of M. bovis strains within, and its dissemination between, the two countries is discussed MH - Argentina MH - Mexico|Distrito Federal PB - OTTAWA: NATL RESEARCH COUNCIL CANADA RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Biotechnology & Applied Microbiology;Immunology;Microbiology U5 - J;Article AV - English IS - 0008-4166 UR - ISI:000234415800012 L2 - Mycobacterium bovis;spoligotyping;bovine tuberculosis;MOLECULAR EPIDEMIOLOGY; TUBERCULOSIS COMPLEX; INFECTION; STRAINS; DIFFERENTIATION; DIVERSITY; DISEASE; NOV SO - Canadian Journal of Microbiology 2005 ;51(11):996-1000 13503 UI - 1793 AU - Cocke DL AU - Schennach R AU - Hossain MA AU - Mencer DE AU - McWhinney H AU - Parga JR AU - Kesmez M AU - Gomes JAG AU - Mollah MYA AD - Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710, USAGraz Tech Univ, Inst Solid State Phys, A-8010 Graz, AustriaWilkes Univ, Dept Chem, Wilkes Barre, PA 18776, USAPrairie View A&M Univ, Dept Chem, Prairie View, TX 77446, USAInst Technol Saltillo, Dept Met & Sci Mat, Saltillo 25000, Coahuila, MexicoUniv Dhaka, Dept Chem, Dhaka 1000, BangladeshCocke, DL, Lamar Univ, Gill Chair Chem & Chem Engn, Beaumont, TX 77710 USA TI - The low-temperature thermal oxidation of copper,Cu3O2, and its influence on past and future studies AB - Due to its enormous technological importance there is a renewed interest in the oxidation of copper. However, due to the complex nature of oxidation of copper, the existence and importance Of Cu3O2, which is a metastable defect structure Of Cu2O, have not gained enough attention from researchers working on the oxidation of copper or copper alloys. The evidence for the Cu3O2 phase has been utilized to reinterpret previous Pulse Field Desorption Mass Spectrometry (PFDMS) and X-ray Photoelectron Spectroscopy (XPS) data. With additional Linear Sweep Voltammetry (LSV) and Galvanostatic Reduction (GR) data, an attempt has been made to delineate the complex nature of the oxidation of copper based on the Modified Cabrera Mott (C-M) Model. It is also emphasized that surface scientists should recognize Cu3O2 in new studies on copper oxidation and in interpreting already existing copper oxidation data. Need for more vacuum and low-pressure-based studies is stressed to characterize the distinct overlayers that can be formed by temperature and pressure control. Surface studies of oxidation of metals and alloys need to be supported and complemented by other techniques such as chemical and electrochemical methods. (c) 2005 Elsevier Ltd. All rights reserved MH - Austria MH - Bangladesh MH - Mexico|Coahuila MH - USA PB - OXFORD: PERGAMON-ELSEVIER SCIENCE LTD RP - NOT IN FILE U3 - TC 4 U4 - Materials Science, Multidisciplinary;Physics, Applied U5 - J;Article AV - English IS - 0042-207X UR - ISI:000230261100011 L2 - copper;CuxO;Cu2O;Cu3O2;CuO;Pulse Field Desorption Mass Spectrometry (PFDMS);XPS;linear sweep voltammetry;galvanostatic reduction;modified Cabrera and Mott (C-M) model;BULK AMORPHOUS-ALLOYS; SUPERCOOLED LIQUID REGION; LINEAR SWEEP VOLTAMMETRY; SOFT-MAGNETIC PROPERTIES; GLASS-FORMING ABILITY; FE-AL ALLOYS; SURFACE REACTIVITY; THIN-FILMS; CU ALLOYS; TI-CU SO - Vacuum 2005 ;79(1-2):71-83 13504 UI - 1249 AU - Cognato AI AU - Gillette NE AU - Bolanos RC AU - Sperling FAH AD - Texas A&M Univ, Dept Entomol, College Stn, TX 77845, USAUSDA, Forest Serv, Pacific SW Res Stn, Berkeley, CA 94701, USAColegio Postgrad, Montecillo, Texcoco, MexicoUniv Alberta, Dept Biol Sci, Edmonton, AB T6G 2E1, CanadaCognato, AI, Texas A&M Univ, Dept Entomol, College Stn, TX 77845, USA TI - Mitochondrial phylogeny of pine cone beetles (Scolytinae, Conophthorus) and their affiliation with geographic area and host AB - Pine cone beetles (Conophthorus spp.) feed and kill immature cones of Pinus species, thereby reducing seed production and seriously impairing reforestation of forest ecosystems. Population variation of Conophthorus reproductive behavior has hampered the development of semiochemical control of these pests. This difficulty is compounded by a lack of taxonomic knowledge and species diagnostic characters. Researchers and managers rely, in part, on host associations and geographic locality for species identifications and these have arguable taxonomic utility. However, host use and/or geographic separation may influence Conophthorus lineage diversification. To improve Conophthorus taxonomy and understand the association of host and geography with lineage diversification, a phylogeny of 43 individuals, including all valid species and a robust sample of C ponderosae from different hosts, is reconstructed using 785 nucleotides of the 3'-end of the mitochondrial cytochrome oxidase I gene. Thirty trees were recovered in a parsimony analysis and the strict consensus was well resolved and supported by branch support measures. Conophthorus was monophyletic but mitochondrial polyphyly was uncovered for several species. The data also suggested an underestimation of species diversity. Phylogenetically related Conophthorus lineages were significantly associated with geographic proximity but not with host, as indicated by comparisons of character optimized geographic distributions and host associations against randomized distributions of these attributes on the parsimony tree. These results suggest that geographic separation better explains the mode of Conophthorus lineage diversification than does host specialization. Based on these results, researchers and managers of Conophthorus should consider populations as potentially different evolutionary entities until species boundaries are delineated via a robust phylogenetic revision of Conophthorus. (c) 2005 Elsevier Inc. All rights reserved MH - Canada MH - Mexico|Estado De Mexico MH - USA PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 4 U4 - Biochemistry & Molecular Biology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 1055-7903 UR - ISI:000231591500006 L2 - Scolytidae;molecular systematics;forest pest;host use;evolution;CYTOCHROME-OXIDASE-I; BANKSIANAE MCPHERSON COLEOPTERA; BARK BEETLES; GENETIC-STRUCTURE; LIFE-HISTORY; DNA; SEQUENCES; EVOLUTION; PATTERNS; BIOLOGY SO - Molecular Phylogenetics and Evolution 2005 ;36(3):494-508 13505 UI - 3264 AU - Cognato AI AU - Sun JH AU - nducho-Reyes MA AU - Owen DR AD - Texas A&M Univ, Dept Entomol, College Stn, TX 77843, USAChinese Acad Sci, Inst Zool, State Key Lab Integrated Management Pest Insect &, Beijing 100080, Peoples R ChinaEscuela Nacl Ciencias Biol, IPN, Mexico City, DF, MexicoCalif Dept Forestry & Fire Protect, Redding, CA 96002, USASun, JH, Texas A&M Univ, Dept Entomol, College Stn, TX 77843, USA TI - Genetic variation and origin of red turpentine beetle (Dendroctonus valens LeConte) introduced to the People's Republic of China AB - 1 The red turpentine beetle, Dendroctonus valens LeConte, is a recent New World introduction to the People's Republic of China. An outbreak of these beetles has infested over 0.5 million hectares of pine forests. 2 Efforts are underway to suppress this outbreak using biological control measures. However, the wide distribution in the native range of D. valens suggests regional variation of the beetle's biology, predators, and parasitoids. Thus, knowledge of the origin of these beetles can help devise precise and effective control measures. 3 A portion of the mitochondrial cytochrome oxidase subunit I gene was sequenced for 218 individuals from 32 populations throughout the native range of D. valens and in China. 4 Haplotype diversity was high. A total of 131 haplotypes were found and Jukes-Cantor corrected nucleotide difference ranged from 0 to 16%. Haplotype diversity ranged from 0.53 to 0.98 and unique haplotypes were found in most populations. 5 Parsimony and statistical parsimony analyses of these haplotypes support the hypothesis that the introduction of D. valens to China was recent and originated from the Pacific North-west of the U.S.A. 6 In addition, the high haplotype diversity also suggests a large or multiple introductions. However, based on the genetics of the beetle's reproductive behaviour, this diversity may also be explained by a limited number of individuals or introductions MH - Mexico|Distrito Federal MH - Peoples R China MH - USA PB - OXFORD: BLACKWELL PUBL LTD RP - NOT IN FILE U3 - TC 11 U4 - Entomology U5 - J;Article AV - English IS - 1461-9555 UR - ISI:000226910700010 L2 - economic pest;invasive species;phylogeography;population;genetics;Scolytidae;MEDITERRANEAN FRUIT-FLY; TOMICUS-PINIPERDA COLEOPTERA; CERATITIS-CAPITATA; DNA-SEQUENCE; SCOLYTIDAE; POPULATIONS; PHYLOGEOGRAPHY; EVOLUTION; MONOTERPENES; ATTRACTION SO - Agricultural and Forest Entomology 2005 ;7(1):87-94 13506 UI - 1713 AU - Cohen AJ AU - Anderson HR AU - Ostro B AU - Pandey KD AU - Krzyzanowski M AU - Kunzli N AU - Gutschmidt K AU - Pope A AU - Romieu I AU - Samet JM AU - Smith K AD - Hlth Effects Inst, Boston, MA 02129, USAUniv London, St Georges Hosp, Sch Med, London WC1E 7HU, EnglandCalif Environm Protect Agcy, Oakland, CA, USAGlobal Environm Facil, Washington, DC, USAWHO, European Ctr Environm & Hlth, Bonn, GermanyUniv So Calif, Keck Sch Med, Los Angeles, CA, USAWHO, Int Programme Protect Human Environm, CH-1211 Geneva, SwitzerlandBrigham Young Univ, Provo, UT 84602, USAInst Nacl Salud Publ, Cuernavaca, MexicoJohns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD, USAUniv Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720, USACohen, AJ, Hlth Effects Inst, 120 2nd Ave,Charleston Navy Yard, Boston, MA 02129 USA TI - The global burden of disease due to outdoor air pollution AB - As part of the World Health Organization (WHO) Global Burden of Disease Comparative Risk Assessment, the burden of disease attributable to urban ambient air pollution was estimated in terms of deaths and disability-adjusted life years (DALYs). Air pollution is associated with a broad spectrum of acute and chronic health effects, the nature of which may vary with the pollutant constituents. Particulate air pollution is consistently and independently related to the most serious effects, including lung cancer and other cardiopulmonary mortality. The analyses on which this report is based estimate that ambient air pollution, in terms of fine particulate air pollution (PM2.5), causes about 3% of mortality from cardiopulmonary disease, about 5% of mortality from cancer of the trachea, bronchus, and lung, and about 1% of mortality from acute respiratory infections in children under 5 yr, worldwide. This amounts to about 0.8 million (1.2%) premature deaths and 6.4 million (0.5%) years of life lost (YLL). This burden occurs predominantly in developing countries; 65% in Asia alone. These estimates consider only the impact of air pollution on mortality (i.e., years of life lost) and not morbidity (i.e., years lived with disability), due to limitations in the epidemiologic database. If air pollution multiplies both incidence and mortality to the same extent (i.e., the same relative risk), then the DALYs for cardiopulmonary disease increase by 20% worldwide MH - United Kingdom MH - Germany MH - USA MH - Mexico|Morelos MH - Switzerland PB - PHILADELPHIA: TAYLOR & FRANCIS INC RP - NOT IN FILE U3 - TC 20 U4 - Environmental Sciences;Public, Environmental & Occupational Health;Toxicology U5 - J;Article AV - English IS - 1528-7394 UR - ISI:000230582500019 SO - Journal of Toxicology and Environmental Health-Part A-Current Issues 2005 ;68(13-14):1301-1307 13507 UI - 893 AU - Cohen C AU - Nieto-Cisneros L AU - Zala C AU - Fessel WJ AU - Gonzalez-Garcia J AU - Gladysz A AU - McGovern R AU - Adler E AU - McLaren C AD - Commun Res Initiat New England, Boston, MA 02215, USAHosp Gabriel Mancera IMSS, Mexico City, DF, MexicoFdn Huesped, Buenos Aires, DF, ArgentinaKaiser Permanente, Med Ctr, San Francisco, CA, USAHosp La Paz, Madrid, SpainWroclaw Med Univ, Wroclaw, PolandBristol Myers Squibb Co, Wallingford, CT 06492, USABristol Myers Squibb Co, Pennington, NJ, USACohen, C, Commun Res Initiat New England, 23 Miner St, Boston, MA 02215 USA TI - Comparison of atazanavir with lopinavir/ritonavir in patients with prior protease inhibitor failure: a randomized multinational trial AB - Objectives: To compare change from baseline in HIV RNA and fasting low-density lipoprotein (LDL) cholesterol levels in protease inhibitor (PI)-experienced patients receiving unboosted atazanavir 400 mg once daily versus lopinavir 400 mg boosted with ritonavir 100 mg twice daily, with two nucleoside reverse transcriptase inhibitors (NRTIs). Secondary objectives included virologic response, CD4 cell count changes, other lipid changes, safety, and tolerability. Methods: Randomized, open-label, multinational, 48-week study in patients with one PI-regimen failure, HIV RNA >= 1000 copies/mL, and CD4 count >= 50 cells/mm(3). Results: Three hundred patients were randomized; 290 treated (144 atazanavir, 146 lopinavir/ritonavir). Lopinavir/ritonavir resulted in a significantly greater reduction in HIV RNA than unboosted atazanavir (-2.02 vs -1.59 log(10) copies/mL, p < 0.001) at week 48. Secondary efficacy endpoints also favored lopinavir/ritonavir; the differences in efficacy between regimens were also observed in secondary analyses comparing those subjects who were susceptible and those subjects who were resistant to their respective Pls at baseline. However, both regimens were equally effective in subjects who had no baseline NRTI mutations. From baseline to week 48, atazanavir resulted in either no change or decreases in fasting LDL cholesterol, total cholesterol, and fasting triglycerides (-6%, -2%, and +1%), whereas lopinavir/ritonavir resulted in increases (+3%, +12%, and +53%) (p < 0.05, all between-treatment comparisons). Fewer patients were administered lipid-lowering therapy in the atazanavir arm (6% vs 20% for lopinavir/ritonavir). Both regimens were safe and well tolerated. Conclusions: While both treatments demonstrated good antiviral efficacy, relatively greater antiviral suppression was observed with lopinavir/ritonavir. In those patients with no NRTI mutations at baseline, both regimens demonstrated comparable virologic suppression. Atazanavir-treated patients demonstrated a superior lipid profile and required less frequent lipid-lowering treatment MH - Argentina MH - Mexico|Distrito Federal MH - Poland MH - Spain MH - USA PB - NEWBURY: LIBRAPHARM RP - NOT IN FILE U3 - TC 15 U4 - Medicine, General & Internal;Medicine, Research & Experimental U5 - J;Article AV - English IS - 0300-7995 UR - ISI:000232716300020 L2 - atazanavir;highly active antiretroviral therapy;human immunodeficiency virus;lopinavir;protease inhibitor;ritonavir;ACTIVE ANTIRETROVIRAL THERAPY; RESISTANCE MUTATIONS; EXPERIENCED PATIENTS; INSULIN-RESISTANCE; CLINICAL-TRIAL; NAIVE SUBJECTS; HIV-INFECTION; SAFETY; HYPERLIPIDEMIA; RITONAVIR SO - Current Medical Research and Opinion 2005 ;21(10):1683-1692 13508 UI - 1528 AU - Cole MW AD - Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269, USAUniv Connecticut, Inst Sci Mat, Storrs, CT 06269, USACIMAV, Chihuahua 31109, MexicoVirginia Commonwealth Univ, Richmond, VA 23284, USACole, MW, Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269, USA TI - Untitled MH - Mexico|Chihuahua MH - USA PB - ABINGDON: TAYLOR & FRANCIS LTD RP - NOT IN FILE U3 - TC 0 U4 - Engineering, Electrical & Electronic;Physics, Applied;Physics, Condensed Matter U5 - J;Editorial Material AV - English IS - 1058-4587 UR - ISI:000231149200001 SO - Integrated Ferroelectrics 2005 ;71():VII-VIX 13509 UI - 1516 AU - Collado-Vides L AU - Rutten LM AU - Fourqurean JW AD - Florida Int Univ, Dept Biol Sci, Miami, FL 33199, USAFlorida Int Univ, SE Environm Res Ctr, Miami, FL 33199, USAUniv Nacl Autonoma Mexico, Mexico City 04510, DF, MexicoUniv N Carolina Wilmington, Ctr Marine Sci, Key Largo, FL 33037, USACollado-Vides, L, Florida Int Univ, Dept Biol Sci, Univ Pk, Miami, FL 33199 USA TI - Spatiotemporal variation of the abundance of calcareous green macroalgae in the Florida Keys: A study of synchrony within a macroalgal functional-form group AB - The abundance of calcareous green algae was recorded quarterly at 28 sites within the Florida Keys National Marine Sanctuary (FKNMS) for a period of 7 years as part of a sea grass monitoring program. To evaluate the validity of using the functional-form group approach, we designed a sampling method that included the functional-form group and the component genera. This strategy enabled us to analyze the spatiotemporal patterns in the abundance of calcareous green algae as a group and to describe synchronous behavior among its genera through the application of a nonlinear regression model to both categories of data. Spatial analyses revealed that, in general, all genera displayed long-term trends of increasing abundance at most sites; however, at some sites the long-term trends for genera opposed one another. Strong synchrony in the timing of seasonal changes was found among all genera, possibly reflecting similar reproductive and seasonal growth pattern, but the variability in the magnitude of seasonal changes was very high among genera and sites. No spatial patterns were found in long-term or seasonal changes; the only significant relation detected was for slope, with sites closer to land showing higher values, suggesting that some factors associated with land proximity are affecting this increase. We conclude that the abundances of genera behaved differently from the functional-form group, indicating that the use of the functional-form group approach may be unsuitable to detect changes in sea grass community structure in the FKNMS at the existing temporal and spatial scale of the monitoring program MH - USA MH - Mexico|Distrito Federal PB - OXFORD: BLACKWELL PUBLISHING RP - NOT IN FILE U3 - TC 2 U4 - Plant Sciences;Marine & Freshwater Biology U5 - J;Article AV - English IS - 0022-3646 UR - ISI:000231146000004 L2 - algal assemblages;calcareous green algae;distribution;Florida Keys National Marine Sanctuary;functional-form group;long-term monitoring;macroalgae;macroalgal abundance;macroalgal communities;monitoring;spatiotemporal variation;synchrony;SOUTH FLORIDA; CORAL-REEFS; HALIMEDA-INCRASSATA; MARINE MACROALGAE; SEAGRASS; CHLOROPHYTA; COMMUNITIES; PATTERNS; GROWTH; BRYOPSIDALES SO - Journal of Phycology 2005 ;41(4):742-752 13510 UI - 400 AU - Colunga GB AU - rriaga-Jordan CM AU - Beltran LV AU - Gonzalez-Ronquillo M AU - Smith DG AU - Estrada-Flores J AU - Rayas-Amor A AU - Castelan-Ortega OA AD - Univ Autonoma Estado Mexico, CICA, Toluca, MexicoUniv Autonoma Estado Mexico, Coordinac Gen Invest & Estudios Avanzados, Toluca, MexicoUniv Autonoma Estado Mexico, Fac Med Vet & Zootecn, Toluca, MexicoUniv Aberdeen, Dept Agr & Forestry, Aberdeen AB24 4FA, ScotlandCastelan-Ortega, OA, Univ Autonoma Estado Mexico, CICA, Inst Literario 100 Col Ctr, Toluca, Mexico TI - Participatory study on feeding strategies for working donkeys used by campesino farmers in the highlands of central Mexico AB - The aim of this work was to describe the feeding strategies for donkeys used by peasant farmers in central Mexico. Feeding strategies for the dry and wet seasons are described, as well as the nutritional characteristics of the main forages and supplements used by the farmers. The extent to which the feeding practices used by farmers matched the digestible energy and crude protein requirements of donkeys for maintenance and work was determined. It was concluded that grazing on native grassland could provide enough energy and protein for donkeys at maintenance level and for those performing only a moderate amount of work. More research in required in order to have better estimates of intake and plant species preferred by donkeys under prevailing grazing conditions MH - Mexico|Estado De Mexico MH - United Kingdom PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 0 U4 - Veterinary Sciences U5 - J;Article AV - English IS - 0049-4747 UR - ISI:000233804600010 L2 - donkeys;feeding strategies;nutritional requirement;NUTRITION; EQUIDS SO - Tropical Animal Health and Production 2005 ;37():143-157 13511 UI - 1780 AU - Comoglio L AU - Amin O AU - Roque A AU - Betancourt-Lozano M AU - Anguas D AU - Haro BM AD - Ctr Austral Invest Cient, RA-9410 Tierra del Fuego, ArgentinaCIAD, Mazatlan 82010, MexicoIRTA, San Carlos de la Rapita 43540, SpainComoglio, L, Ctr Austral Invest Cient, RA-9410 Tierra del Fuego, Argentina TI - Evaluation of sublethal biomarkers in Litopenaeus vannamei on foodborne exposure to methyl parathion AB - Sublethal effects of foodborne exposure to methyl parathion (0.62 and 1.31 mu g methyl parathion*g(-1) dry weight of food) on juveniles of Litopenaeus vannamei using integrated biochemical (acetylcholinesterase (AChE) and ATPases) and physiological (feeding rate (FR), egestion rate (ER), and hepatosomatic index (HI)) biomarkers were evaluated. The HI was significantly higher in controls than in pesticide treatments. The FR was significantly lower in controls than in pesticide treatments while no significant differences were detected in the ER. AChE activity was significantly higher in controls than in pesticide treatments (control = 0.11 +/- 0.02; solvent control = 0. 11 +/- 0.03; 0.62 = 0.07 +/- 0.01; 1.31 = 0.08 +/- 0.02 mu M*min(-1) *mg protein(-1)). The total-ATPase activity was significantly lower in controls than in pesticide treatments (control= 77.90 +/- 12.41; solvent control=83.69 +/- 22.05; 0.62=110.03 +/- 22.17; 1.31=121.54 +/- 19.84 mu M P-i*h(-1) *mg protein(-1)). The Mg2+-ATPase activity was significantly higher in treatments than in controls (control= 65.14 +/- 10.76; solvent control= 75.12 +/- 21.10; 0.62 = 100.53 +/- 20.97; 1.31 = 108.94 +/- 17.26 mu M Pi*h(-1)*mg protein(-1)). Finally, the results obtained for the Na+/K+-ATPase activity were significantly higher in control and in 1.31 than in solvent control and in 0.62 (control= 14.06 +/- 2.63; solvent control= 7.30 +/- 4.13; 0.62 = 7.60 +/- 3.81; 1.31 = 13.42 +/- 2.88 mu M P-i*h(-1)*mg protein(-1)). The results in this study showed that pulse exposures to methyl parathion via food could elicit measurable effects on the marine shrimp L. vannamei, indicating that foodborne exposure can be a reliable toxicological procedure and, if combined with pulse exposures, could also simulate more realistic exposure scenarios. (c) 2004 Elsevier Inc. All rights reserved MH - Argentina MH - Mexico|Sinaloa MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 2 U4 - Environmental Sciences;Toxicology U5 - J;Article AV - English IS - 0147-6513 UR - ISI:000230511100008 L2 - foodborne;Litopenaeus vannamei;methyl parathion;biomarkers;ATPase;AChEase;feeding rate;DAPHNIA-MAGNA STRAUS; CHASMAGNATHUS-GRANULATA DECAPODA; SHRIMP PENAEUS-JAPONICUS; CHOLINESTERASE ACTIVITY; ATPASE ACTIVITY; GILL ATPASES; COASTAL ZONE; IN-VIVO; TOXICITY; CADMIUM SO - Ecotoxicology and Environmental Safety 2005 ;62(1):66-74 13512 UI - 451 AU - Concepcion-Rosabal B AU - Rodriguez-Fuentes G AU - Bogdanchikova N AU - Bosch P AU - Avalos M AU - Lara VH AD - Univ La Habana, Fac Fis, IMRE, Lab Ingn Zeolitas, Havana 10400, CubaUNAM, CCMC, Mexico City 22800, DF, MexicoUniv Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, MexicoUniv Autonoma Metropolitana Iztapalapa, Mexico City 09340, DF, MexicoConcepcion-Rosabal, B, Univ La Habana, Fac Fis, IMRE, Lab Ingn Zeolitas, Havana 10400, Cuba TI - Comparative study of natural and synthetic clinoptilolites containing silver in different states AB - Clinoptilolite is a widely used natural zeolite due to its abundance in nature. The present work discusses the characteristics of silver modified clinoptilolites (natural and synthetic) containing silver in different states. The results obtained by the combined use of XRD, UV-Visible spectroscopy, and SAXS are described. These analyses were carried out to determine the features of silver in the zeolitic structure (natural and synthetic) and the particle size distribution of the Ag conglomerates produced in the reduced samples. The crystalline structure of the Ag-synthetic clinoptilolite was not affected by the thermal reduction of Ag; however, the Ag-natural clinoptilolite samples were less thermally stable. In synthetic and natural clinoptilolites after reduction at 100 degrees C, small clusters (radius of <0.5 nm) located inside the channels along with metal particles (with radius <7 nm) on the external surface were observed. In Ag-natural clinoptilolite reduced at 100 degrees C, along with the small Ag-2(+) and Ag-4(delta+) clusters stabilized inside clinoptilolite pores, large 2 Ag-8(0) and Ag-8(delta+) clusters can be formed inside large mordenite channel or in the interstitial spaces of the particles that compose this mineral. Reduction at 400 degrees C leads to disappearance of silver clusters and large particle formation. In both supports the particles cannot be located in the zeolite cavities, which are much smaller. (c) 2005 Elsevier Inc. All rights reserved MH - Cuba MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000233714900029 L2 - zeolites;clinoptilolite;cation exchange;silver clusters;ANGLE SCATTERING DATA; ZEOLITE; STABILIZATION; ADSORPTION; MORDENITE; STABILITY; CLUSTERS; RATIO; IONS SO - Microporous and Mesoporous Materials 2005 ;86(1-3):249-255 13513 UI - 343 AU - Concha-Dimas A AU - Cerca M AU - Rodriguez SR AU - Watters RJ AD - Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, MexicoUNAM, Ctr Geociencias, Queretaro 76001, Queretaro, MexicoUniv Veracruzana, Ctr Ciencias Tierra, Xalapa 91090, Veracruz, MexicoUniv Nevada, Mackay Sch Earth Sci & Engn, Reno, NV 89557, USAConcha-Dimas, A, Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Mexico City 04510, DF, Mexico TI - Geomorphological evidence of the influence of pre-volcanic basement structure on emplacement and deformation of volcanic edifices at the Cofre de Perote-Pico de Orizaba chain and implications for avalanche generation AB - Pre-volcanic structure of the basement influences volcanism distribution and avalanche generation in volcanic edifices. Therefore, systematic studies of basement structure below volcanic chains are necessary to understand the deformation effects observed in the surface and vice versa. Based on a compilation of pre-existing data, interpretation of aerial photographs and satellite images, and a collection of structural data we analyzed morphological and structural features of the Cofre de Perote-Pico de Orizaba (CP-PO) volcanic chain and its basement. We have identified three sets of regional lineaments that are related to basement trends. (1) NW 55 degrees SE fractures are parallel to anticline folds observed in Cretaceous rocks that originated during Laramide shortening. These folds present an abrupt morphology observed only in the eastern flank but that is likely to continue below the volcanic chain. (2) NE 55 degrees SW fractures are parallel to normal faults at the basement. We infer that these basement faults confine the CP-PO chain within a stepped graben with a total normal displacement of about 400 in. These faults have been active through time since they have affected volcanic deposits and induced the emplacement of monogenctic vents. Notably, lineaments of monogenctic vents concentrate where the basement is relatively shallow. (3) Another set of faults, oriented N-S, has been observed affecting the scarce basement outcrops at the western flank of the chain covered by lacustrine deposits. Lineaments measured in the volcanic edifice of Pico de Orizaba correlate with the regional trends. In particular, the NE 55 degrees SW alignment of monogenetic vents and fractures at Pico de Orizaba suggest that the same dike trend exists within the volcanic edifice. A normal fault with similar orientation was documented at the NE continuation of an alignment crossing the volcanic edifice along the Jamapa canyon. In the absence of magmatic activity related to collapses, the displacement of NE 55 degrees SW faults represents a potential triggering mechanism for generating avalanches at Pico de Orizaba volcano. Instability is enhanced by the presence of N-S trending fractures crossing the entire volcanic edifice and E-W fractures affecting only the present day cone. We conclude that mechanical instability of the volcanic chain is influenced by the basement structure heterogeneity, but further detailed studies are necessary at individual volcanoes to evaluate their effects on volcano deformation. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Mexico|Queretaro MH - Mexico|Veracruz MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Geography, Physical;Geology;Geosciences, Multidisciplinary U5 - J;Article AV - English IS - 0169-555X UR - ISI:000234045800002 L2 - Pico de Orizaba;Cofre de Perote;morphological lineaments;vent lineaments;basement structure control;volcanism emplacement;volcanic avalanche;CITLALTEPETL VOLCANO; DEBRIS AVALANCHES; HAZARD ASSESSMENT; LATE-PLEISTOCENE; FUTURE HAZARDS; CENTRAL MEXICO; DE-ORIZABA; BELT; EARTHQUAKES; COLLAPSE SO - Geomorphology 2005 ;72(1-4):19-39 13514 UI - 2128 AU - Condes-Lara M AU - Maie IAS AU - Dickenson AH AD - Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Neurofisiol, Mexico City, DF, MexicoInst Nacl Psiquiatria Ramon de la Fuente, Mexico City, DF, MexicoUniv Coll London, Dept Pharmacol, London WC1E 6BT, EnglandCondes-Lara, M, Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Neurofisiol, Campus Juriquilla, Mexico City, DF, Mexico TI - Oxytocin actions on afferent evoked spinal cord neuronal activities in neuropathic but not in normal rats AB - A hypothalamic oxytocinergic-descending pathway that reaches the dorsal horn of the spinal cord has been well documented and recently related to states of pain and analgesia. In order to study the action of the neuropeptide oxytocin (OT) on pain-related responses, we compared dorsal horn neuronal responses to electrical and mechanical stimulation of receptive fields in normal and neuropathic rats. Spinal nerve (L5 and L6) ligation (Chung rats) was used to produce experimental neuropathy. Single unit activity was recorded at the L4-L5 level from neurons identified as wide dynamic range presenting latency responses corresponding to A-beta, A-delta, C fibers and also exhibiting post-discharge, and wind-up. We tested intrathecally applied doses of 0.05, 0.1, 1, 2, 5, 10 I.U. of OT. Minor effects on responses to electrical stimulation were present in normal rats. Mechanical responses evoked by von Frey filaments were slightly reduced in normal animals. In neuropathic rats a dose of 1 I.U. produced a significant reduction in C-fibers and post-discharge activities, and doses of 2 LU. caused a further, pronounced reduction in post-discharge, wind-up, and input values. However, the most marked change was the post-discharge reduction at 10 and 20 min after OT administration. Mechanical responses were significantly reduced in terms of their discharge rate response in neuropathic rats. The contrasting results obtained in normal and neuropathic rats revealed an important distinction between these animals and indicate that plastic changes occur as a consequence of nerve damage. In neuropathic rats, mechanisms involving ascending noxious information to the paraventricular nuclei and descending OT activities could be altered so sensitizing the OT receptors of the spinal dorsal horn cells and could explain our observations. Our results point out an anti-algesic OT effect in neuropathic rats. (C) 2005 Elsevier B.V. All rights reserved MH - United Kingdom MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 4 U4 - Neurosciences U5 - J;Article AV - English IS - 0006-8993 UR - ISI:000229530300015 L2 - spinal cord cells;post-discharge;wind-up;receptive field stimulation;pain states;NITRIC-OXIDE; DORSAL-HORN; INDUCED ANALGESIA; NERVE LIGATION; WIND-UP; PAIN; NOCICEPTION; VASOPRESSIN; SYSTEM; MORPHINE SO - Brain Research 2005 ;1045(1-2):124-133 13515 UI - 2860 AU - Conradson SD AU - Begg BD AU - Clark DL AU - den Auwer C AU - Ding M AU - Dorhout PK AU - Espinosa-Faller FJ AU - Gordon PL AU - Haire RG AU - Hess NJ AU - Hess RF AU - Keogh DW AU - Lander GH AU - Manara D AU - Morales LA AU - Neu MP AU - Paviet-Hartmann P AU - Rebizant J AU - Rondinella VV AU - Runde W AU - Tait CD AU - Veirs DK AU - Villella PM AU - Wastin F AD - Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545, USALos Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545, USALos Alamos Natl Lab, Nucl Mat Technol Div, Los Alamos, NM 87545, USAAustralian Nucl Sci & Technol Org, Menai, NSW 2234, AustraliaCEA, F-30207 Bagnols Sur Ceze, FranceColorado State Univ, Ft Collins, CO 80523, USACtr Marista Estudios Super, Merida, Yucatan, MexicoOak Ridge Natl Lab, Oak Ridge, TN 37831, USAPacific NW Natl Lab, Richland, WA 99352, USACommiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, GermanyConradson, SD, Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA TI - Charge distribution and local structure and speciation in the UO2+x and PuO2+x binary oxides for x <= 0.25 AB - The local structure and chemical speciation of the mixed valence, fluorite-based oxides UO2+x (0.00 <= x <= 0.20) and PuO2+x/PuO2+x-y(OH)(2y)center dot zH(2)O have been determined by U/Pu L-m XAFS spectroscopy. The U spectra indicate (1) that the O atoms are incorporated as oxo groups at short (1.75 angstrom) U-O distances consistent with U(VI) concomitant with a large range of U displacements that reduce the apparent number of U neighbors and (2) that the UO2 fraction remains intact implying that these O defects interact to form Clusters and give the heterogeneous structure consistent with the diffraction patterns. The PuO2+x system, which does not show a separate phase at its x = 0.25 endpoint, also displays (1) oxo groups at longer 1.9 angstrom distances consistent with Pu(V + delta), (2) a multisite Pu-O distribution even when x is close to zero indicative of the formation of stable species with H2O and its hydrolysis products with O2-, and (3) a highly disordered, spectroscopically invisible Pu-Pu component. The structure and bonding in AnO(2+x) are therefore more complicated than have previously been assumed and show both similarities but also distinct differences among the different elements. (c) 2004 Elsevier Inc. All rights reserved MH - USA MH - Australia MH - France MH - Germany MH - Mexico|Yucatan PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 8 U4 - Chemistry, Inorganic & Nuclear;Chemistry, Physical U5 - J;Article AV - English IS - 0022-4596 UR - ISI:000227565300019 L2 - speciation;local structure;X-ray absorption fine structure spectroscopy;urania;plutonia;mixed valence actinide oxide;XAFS;NEUTRON-DIFFRACTION; CRYSTAL-STRUCTURE; PLUTONIUM DIOXIDE; URANIUM-DIOXIDE; ENVIRONMENT; NEPTUNIUM; SPECTROSCOPY; CHEMISTRY; ACTINIDES; CLUSTERS SO - Journal of Solid State Chemistry 2005 ;178(2):521-535 13516 UI - 2680 AU - Conroy CJ AU - Bryson RW AU - Lazcano D AU - Knight A AD - Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720, USASan Antonio Zoo, Dept Herpetol, San Antonio, TX 78212, USAUniv Auton Nuevo Leon, Lab Herpetol, Mexico City, DF, MexicoStanford Univ, Dept Anthropol Sci, Stanford, CA 94305, USAConroy, CJ, Univ Calif Berkeley, Museum Vertebrate Zool, 3101 Valley Life Sci Bldg, Berkeley, CA 94720 USA TI - Phylogenetic placement of the pygmy alligator lizard based on mitochondrial DNA AB - Morphological studies have proven inconsistent in establishing the phylogenetic placement and taxonomic assignment of Elgaria parva. Originally classified as Gerrhonotus parvus Knight and Scudday, this taxon was reassigned to Elgaria based on morphology. To investigate its phylogenetic affinities, we generated mitochondrial DNA sequence data and conducted phylogenetic analyses together with published sequences for a broad taxonomic sampling of anguid lizards. We conducted parsimony, likelihood, and Bayesian analyses of the data. Our results indicate that E. parva forms a clade with other Gerrhonotus rather than Elgaria. Furthermore, Elgaria and Gerrhonotus are not sister taxa. Based on our new molecular evidence, we suggest that E. parva be classified as Gerrhonotus parvus as originally described MH - USA MH - Mexico|Distrito Federal PB - ST LOUIS: SOC STUDY AMPHIBIANS REPTILES RP - NOT IN FILE U3 - TC 0 U4 - Zoology U5 - J;Article AV - English IS - 0022-1511 UR - ISI:000228053200020 L2 - ANGUID LIZARDS; INFERENCE; EVOLUTION SO - Journal of Herpetology 2005 ;39(1):142-147 13517 UI - 1032 AU - Contreras-Jurado C AU - Sanchez-Morito N AU - Ruiz-Contreras A AU - Gonzalez-Martinez MT AU - Soler-Diaz A AD - Univ Madrid, Fac Med, Dept Fisiol, E-18012 Granada, SpainUniv Nacl Autonoma Mexico, Fac Med, Dept Farmacol, Mexico City 04510, DF, MexicoUniv Granada, Inst Biotecnol, E-18071 Granada, SpainSoler-Diaz, A, Univ Madrid, Fac Med, Dept Fisiol, Avda Madrid 13, E-18012 Granada, Spain TI - Evidence for simultaneous 1Na(+): 1Mg(2+) and ping pong 2Na(+): 1Mg2+exchangers in rat thymocytes AB - Rat thymocytes showed two Na+/ Mg2+ exchangers with high- and low- affinities for external Na+ ( Na-o(+)) at physiological internal Mg2+ content. The total internal Mg2+ content ( Mg2+ (it)) was enhanced by loading with MgCl2 and the ionophore A- 23187. Under these conditions, Na+/ Mg2+ exchangers were dramatically stimulated by the Mg2+ (it) increase. Na+- induced Mg2+ effluxes were independent of Cl-o(-) or H+. The Na+/ Mg2+ exchangers, which we named HANao ( high affinity for Na-o(+)) and LANao ( low affinity for Na-o(+)), were dissected in Mg2+- loaded thymocytes according to their kinetics and stoichiometries. HANao, which showed an apparent dissociation constant for Na-o(+) ( K-Na H) = 9.2 +/- 1.6 mmol l(-1) Na-o(+) and a maximal Na+ influx rate ( V-Na( Na (H)) (max)) = 30.5 +/- 6.1 mmol ( 1 cells)(-1) h(-1), was a 1Na(+): 1Mg(2+) simultaneous antiporter insensitive to external magnesium ( Mg-o(2+)) whereas that LANao, with K-Na (L) = 65.1 +/- 8.6 mmol l(-1) Na+ and a V-Na( Na (L)) (max) = 79.5 +/- 14.3 mmol ( l cells)(-1) Na+ h(-1), was a 2Na(+): 1Mg(2+) " ping- pong" antiporter which was strongly inhibited by Mg-o(2+). At physiological concentration of Mg-o(2+) ( 1 mM), the Na+/ Mg2+ exchange through the LANao was inhibited by similar to 50%. Amiloride ( 10(-4) M) inhibited at similar extent both Na+ and Mg2+ fluxes at high and at low Na-o(+) MH - Mexico|Distrito Federal MH - Spain PB - MANHASSET: FRONTIERS IN BIOSCIENCE INC RP - NOT IN FILE U3 - TC 1 U4 - Biochemistry & Molecular Biology;Cell Biology U5 - J;Article AV - English IS - 1093-9946 UR - ISI:000232319800060 L2 - Na/Mg exchange;ping pong exchanger;simultaneous exchanger;amiloride;thymocytes;RED-BLOOD-CELLS; INTRACELLULAR CA2+ STORES; PLASMA-MEMBRANE; MAGNESIUM TRANSPORT; MG2+ TRANSPORTERS; NA+/MG2+ ANTIPORT; NA+; EXCHANGE; MECHANISMS; EFFLUX SO - Frontiers in Bioscience 2005 ;10():1693-1706 13518 UI - 142 AU - Contreras-Ramos A AU - Fiorentin GL AU - Urakami Y AD - Univ Autonoma Estado Hidalgo, Ctr Invest Biol, Puchuca 42001, Hidalgo, MexicoUniv Vale Rio Sinos, Setor Zool, Entomol Lab, BR-93022000 Sao Leopoldo, RS, BrazilContreras-Ramos, A, Univ Autonoma Estado Hidalgo, Ctr Invest Biol, Apdo Postal 1-69,Plaza Juarez, Puchuca 42001, Hidalgo, Mexico TI - A new species of alderfly (Megaloptera : Sialidae) from Rio Grande do Sul, Brazil AB - Eight species of Neotropical alderflies (Megaloptera: Sialidae) have been previously described, three of which are from Brazil. In this paper, Protosialis hauseri (Megaloptera: Sialidae), a new species of alderfly from Floresta Nacional de Sao Francisco de Paula, Rio Grande do Sul, Brazil, is described and illustrated. Besides a characteristic color pattern of head and pronotum, the new species is distinct in genitalia, the male having a unique ninth sternum with a posteromedian projection and a pair of posterolateral lobes MH - Brazil MH - Mexico|Hidalgo PB - PLON: MAX-PLANCK-INST LIMNOLOGIE RP - NOT IN FILE U3 - TC 1 U4 - Ecology;Limnology U5 - J;Article AV - English IS - 0065-6755 UR - ISI:000235042600007 L2 - Protosialis;neotropics;Brazil;taxonomy SO - Amazoniana-Limnologia et Oecologia Regionalis Systemae Fluminis Amazonas 2005 ;18(3-4):267-272 13519 UI - 912 AU - Contreras SA AU - Gonzalez JR AU - Escamilla MA AU - Raventos H AU - Ontiveros A AU - Nicolini H AU - Mendoza R AU - Munoz R AU - Dassori A AU - Medina RA AU - Ramirez M AU - Salazar R AU - Armas R AU - Montero PA AU - Peters P AD - Univ Texas, Hlth Sci Ctr, San Antonio, TX, USAUniv Costa Rica, San Jose, Costa RicaInst Info & Invest Salud Mental, Monterrey, MexicoGrp Estudios Med & Familiares Carracci, Mexico City, DF, MexicoHarbor Univ Calif LA, Res & Educ Inst, Los Angeles, CA, USALogan Hts Family Hlth Ctr San Diego, San Diego, CA, USAUCSF, Langley Porter Psychiat Inst, San Francisco, CA, USA TI - Familiality of SANS-SAPS symptom dimensions in a Hispanic population MH - Costa Rica MH - Mexico|Distrito Federal MH - Mexico|Nuevo Leon MH - USA PB - HOBOKEN: WILEY-LISS RP - NOT IN FILE U3 - TC 0 U4 - Genetics & Heredity;Psychiatry U5 - J;Meeting Abstract AV - English IS - 1552-4841 UR - ISI:000232357300428 SO - American Journal of Medical Genetics Part B-Neuropsychiatric Genetics 2005 ;138B(1):119-119 13520 UI - 107 AU - Cooksy AL AU - Moreno-Armenta MG AD - San Diego State Univ, Dept Chem, San Diego, CA 92182, USAUniv Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Mexico City 04510, DF, Mexico TI - Ab initio study of the cyclooctatetraenyl radical MH - Mexico|Distrito Federal MH - USA PB - WASHINGTON: AMER CHEMICAL SOC RP - NOT IN FILE U3 - TC 0 U4 - Chemistry, Multidisciplinary U5 - J;Meeting Abstract AV - English IS - 0065-7727 UR - ISI:000235066603270 SO - Abstracts of Papers of the American Chemical Society 2005 ;229():U743-U743 13521 UI - 2585 AU - Cooper K AU - Huang FF AU - Batista L AU - Rayo CD AU - Bezanilla JC AU - Toth TE AU - Meng XJ AD - Virginia Polytech Inst & State Univ, Virginia Maryland Reg Coll Vet Med, Ctr Mol Med & Infect Dis, Blacksburg, VA 24061, USAUniv Montreal, Fac Med Vet, St Hyacinthe, PQ J2S 7C6, CanadaUGRPS, Inst Technol Sonora, Ctr Diagnost Integral, Sonora, MexicoBiol Lab, SA CV, Puebla, MexicoMeng, XJ, Virginia Polytech Inst & State Univ, Virginia Maryland Reg Coll Vet Med, Ctr Mol Med & Infect Dis, 1410 Prices Fork Rd, Blacksburg, VA 24061 USA TI - Identification of genotype 3 hepatitis E virus (HEV) in serum and fecal samples from pigs in Thailand and Mexico, where genotype 1 and 2 HEV strains are prevalent in the respective human populations AB - Hepatitis E virus (HEV), the causative agent of hepatitis E, is an important public health concern in many developing countries. Increasing evidence indicates that hepatitis E is a zoonotic disease. There exist four major genotypes of REV, and HEV isolates identified in samples from pigs belong to either genotype 3 or 4. Genotype 1 and 2 HEVs are found exclusively in humans. To determine whether genotype 1 and 2 HEVs also exist in pigs, a universal reverse transcription-PCR assay that is capable of detecting all four REV genotypes was used to test for the presence of REV RNA in serum and/or fecal samples from pigs in Thailand, where genotype 1 human REV is prevalent, and from pigs in Mexico, where genotype 2 human REV was epidemic. In Thailand, swine REV RNA was detected in sera from 10/26 pigs of 2 to 4 months of age but not in sera from 50 pigs of other ages. In Mexico, swine HEV RNA was detected in 8/125 sera and 28/92 fecal samples from 2-to 4-month-old pigs. Antibodies to swine REV were also detected in about 81% of the Mexican pigs. A total of 44 swine REV isolates were sequenced for the open reading frame 2 gene region. Sequence analyses revealed that all swine REV isolates identified in samples from pigs in Thailand and Mexico belong to genotype 3. Phylogenetic analyses revealed that minor branches associated with geographic origin exist among the swine REV isolates. The results indicated that genotype 1 or 2 swine HEV does not exist in pigs from countries where the respective human REV genotype I or 2 is prevalent. It is likely that only genotype 3 and 4 REV strains have zoonotic potential MH - Canada MH - Mexico|Puebla MH - Mexico|Sonora MH - USA PB - WASHINGTON: AMER SOC MICROBIOLOGY RP - NOT IN FILE U3 - TC 17 U4 - Microbiology U5 - J;Article AV - English IS - 0095-1137 UR - ISI:000228404100028 L2 - CROSS-SPECIES INFECTION; UNITED-STATES; BLOOD-DONORS; AVIAN HEV; SWINE; SEROREACTIVITY; TRANSMISSION; ANTIBODIES; COUNTRIES; CHICKENS SO - Journal of Clinical Microbiology 2005 ;43(4):1684-1688 13522 UI - 575 AU - Cooper PS AU - Engelfried E AD - Fermilab Natl Accelerator Lab, Batavia, IL 60510, USAUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoCooper, PS, Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA TI - Redesign of the CKM RICH velocity spectrometers for use in a 1/4 GHz unseparated beam AB - We report here a redesign of the CKM RICH velocity spectrometers for use in a 1/4GHz unseparated beam adapted to the KTeV beam line and detector hall at Fermilab (P940). The redesigns reported here comprise modest modification to the original designs for CKM(E921) to accommodate the change in beam flux, momentum, and momentum bite of the primary beam. The ultimate performance of the velocity spectrometer systems, as quantified by the missing mass squared resolution for K+ -> pi(+)pi(0), remains largely unchanged from the original design. Published by Elsevier B.V MH - Mexico|San Luis Potosi MH - USA PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 0 U4 - Instruments & Instrumentation;Nuclear Science & Technology;Physics, Particles & Fields;Spectroscopy U5 - J;Article AV - English IS - 0168-9002 UR - ISI:000233314900037 L2 - RICH detector;rare kaon decay;DETECTOR SO - Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment 2005 ;553(1-2):220-224 13523 UI - 1262 AU - Cordero C AU - Eberhard WG AD - Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Coyoacan 04510, DF, MexicoUniv Costa Rica, Escuela Biol, San Jose, Costa RicaCordero, C, Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Apdo Post 70-275, Coyoacan 04510, DF, Mexico TI - Interaction between sexually antagonistic selection and mate choice in the evolution of female responses to male traits AB - Theoretical analyses of selection on mutations affecting female responsiveness to male traits suggested that sexually antagonistic selection and traditional female choice are not exclusive alternatives. They can act simultaneously on the same female traits, and can either reinforce or act against each other. These analyses do not yield theoretical predictions regarding the relative frequency and importance of the two types of selection on female responsiveness, as the balance between them is affected by complex factors, including the frequency distribution of male traits, and the mechanisms of male action. Male-female interactions differ from many other evolutionary interactions involving potential evolutionary conflict, in that male and female genomes are irretrievably mixed in their offspring, thus increasing the possibility of indirect payoffs to one participant from the traits of its partner MH - Costa Rica MH - Mexico|Distrito Federal PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 6 U4 - Ecology;Evolutionary Biology;Genetics & Heredity U5 - J;Article AV - English IS - 0269-7653 UR - ISI:000231806500002 L2 - cryptic female choice;sexual selection;sexually antagonistic coevolution;REPRODUCTIVE PHYSIOLOGY; CONFLICT; PERSPECTIVE; COMPETITION; RESISTANCE; MORPHOLOGY; POLYANDRY; PRODUCTS; BEHAVIOR; BEETLES SO - Evolutionary Ecology 2005 ;19(2):111-122 13524 UI - 913 AU - Cordero S AU - Rojas F AU - Kornhauser I AU - Esparza M AU - Zgrablich G AD - Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, MexicoUniv Nacl San Luis, Lab Ciencias Superficies & Medios Porosos, San Luis, ArgentinaRojas, F, Univ Autonoma Metropolitana Iztapalapa, Dept Quim, POB 55-534, Mexico City 09340, DF, Mexico TI - Menisci interactions during adsorption on mesoporous materials: Evaluation of delayed and advanced adsorption AB - Menisci interactions can strongly affect the development of adsorption processes in mesoporous materials. Phenomena such as delayed and advanced adsorption represent outright manifestations of these interactions then leading to deceptive determinations of the pore-size distribution. At present, a characterization study involving simulated porous networks with qualities similar to those owned by real materials and in which the above processes can occur is still lacking. A Monte Carlo procedure is used to evaluate the extent of delayed and advanced adsorption in porous structures of assorted morphologies. This treatment allows a clear detection of the types of mesoporous structures that can experience the incidence of delayed and advanced adsorption MH - Argentina MH - Mexico|Distrito Federal PB - DORDRECHT: SPRINGER RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0929-5607 UR - ISI:000232724900013 L2 - delayed adsorption;advanced adsorption;Monte Carlo simulation;porous networks;PORE-SIZE DISTRIBUTIONS; CAPILLARY CONDENSATION; N-2 SORPTION; MONTE-CARLO; HYSTERESIS; SIMULATION; CATALYSTS; NETWORKS; NITROGEN SO - Adsorption-Journal of the International Adsorption Society 2005 ;11():91-96 13525 UI - 3360 AU - Cordoba LF AU - Fuentes GA AU - de Correa CM AD - Univ Antioquia, Dept Ingn Quim, Medellin 1226, ColombiaUniv Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Mexico City 09340, DF, Mexicode Correa, CM, Univ Antioquia, Dept Ingn Quim, Apartado Aereo, Medellin 1226, Colombia TI - Characterization of bimetallic Pd/Co-HMOR used for the CH4-SCR of NOx AB - Several techniques, xrd, bet, tpr, uv-vis, ftir, al-27-nmr, and si-29-nmr, were employed to characterize long tos (Time on stream) Effects on bimetallic pd/co-hmor samples used in the scr of nox by ch4. The irreversible degradation of catalysts in time for nox and ch4 conversion was fitted to an exponential decay function. Upon using the crystalline structure of mordenite is preserved, but the apparent surface area slightly diminished and i-plot analysis of n-2 adsorption isotherms showed that the external surface area increased and mesopore volume formed. Ftir, al-27 nmr and si-29 mas nmr confirmed steam-induced dealumination, mainly in the 12-ring channels. Also, h-2-tpr profiles indicated that a higher fraction of co oxo-ions. May be present in the aged samples and changes in the relative co2+ populations of alpha, beta and gamma sites were confirmed by u-vis furthermore, pd2+ cations appear to be preferentially located in the side pockets of mor. The absence of hydride phases in h-2-tpr of fresh and aged samples confirms close pd-co interactions. Therefore. Pd and co interactions in the 8-ring channels of mor may explain the relatively good stability of pd/co-hmor under wet conditions for about 100h tos. (C) 2004 Elsevier inc. All rights reserved MH - Colombia MH - Mexico|Distrito Federal PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 5 U4 - Chemistry, Applied;Chemistry, Physical;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary U5 - J;Article AV - English IS - 1387-1811 UR - ISI:000226536700012 L2 - Co-Pd bimetallic zeolites;mordenite;NOx reduction;methane;SELECTIVE CATALYTIC-REDUCTION; PD-ZEOLITE CATALYSTS; NITRIC-OXIDE; H-MORDENITE; BRONSTED ACIDITY; MAS NMR; FT-IR; METHANE; CO; DEACTIVATION SO - Microporous and Mesoporous Materials 2005 ;77(2-3):193-201 13526 UI - 73 AU - Cordova-Fraga T AU - Carneiro AAO AU - de Araujo DB AU - Oliveira RB AU - Sosa M AU - Baffa O AD - Univ Sao Paulo, Dept Fis & Matemat, FFCLRP, Sao Paulo, BrazilUniv Guanajuato, Inst Fis, Guanajuato, MexicoUniv Sao Paulo, Fac Med Ribeirao Preto, Sao Paulo, BrazilSosa, M, Univ Sao Paulo, Dept Fis & Matemat, FFCLRP, Sao Paulo, Brazil TI - Spatiotemporal evaluation of human colon motility using three-axis fluxgates and magnetic markers AB - An alternative method to study the mechanical activity of the human colon in fasting and postprandial states is presented. The method is based on measurements of the magnetic fields produced by a magnetic marker, a small cylindrical NdBFe magnet, when it was ingested by the subjects. A portable magnetic probe, consisting of two digital three-axis fluxgate magnetometers, arranged in a first-order electronic gradiometer, was implemented for this research. Measurements were taken in 16 healthy male subjects. Contractile activity frequency measurements were taken along the colon length, including the ascending, transverse and descending sections, as well as the rectal sigmoidal section. Values for the contractile activity frequency of 2-5 cycles min(-1) were measured. The set-up is simple, low-cost and suitable for use in an unshielded environment MH - Brazil MH - Mexico|Guanajuato PB - HERTS: PETER PEREGRINUS LTD RP - NOT IN FILE U3 - TC 2 U4 - Computer Science, Interdisciplinary Applications;Engineering, Biomedical;Mathematical & Computational Biology;Medical Informatics U5 - J;Article AV - English IS - 0140-0118 UR - ISI:000236277700003 L2 - magnetic marker;contractile activity frequencies;colon motility;MAGNETOMETER METHOD; SEGMENTAL TRANSIT; STOMACH MOTILITY; SENSOR SO - Medical & Biological Engineering & Computing 2005 ;43(6):712-715 13527 UI - 1845 AU - Coria-Avila GA AU - Ouimet AJ AU - Pacheco P AU - Manzo J AU - Pfaus JG AD - Univ Veracruzana, Inst Neuroetol, Xalapa 91000, Veracruz, MexicoCoria-Avila, GA, Concordia Univ, Ctr Studies Behav Neurobiol, Dept Psychol, 7141 Sherbrooke W, Montreal, PQ H4B 1R6, Canada TI - Olfactory conditioned partner preference in the female rat AB - Paced copulation induces conditioned place preference in female rats. The authors examined whether associating almond-scented males with paced copulation induces conditioned partner preference. The paired group received 4 paced copulations with almond-scented males and 4 nonpaced copulations with unscented males sequentially at 4-day intervals. The Impaired group received the opposite order of association, whereas the randomly paired group received random associations. A 4th group received a single pairing. On the final test, females were placed into an open field with 2 males, I scented and I unscented. Females in the paired group solicited the scented male more frequently, and most chose the scented male for their 1st ejaculation. Thus, an odor paired with paced copulation elicits conditioned partner preference in female rats MH - Canada MH - Mexico|Veracruz PB - WASHINGTON: AMER PSYCHOLOGICAL ASSOC/EDUCATIONAL PUBLISHING FOUNDATION RP - NOT IN FILE U3 - TC 9 U4 - Behavioral Sciences;Neurosciences U5 - J;Article AV - English IS - 0735-7044 UR - ISI:000230258600008 L2 - pacing;sexual reward;odor;appetitive;conditioned place preference;AIRBORNE CHEMICAL COMMUNICATION; C-FOS EXPRESSION; SEXUAL-BEHAVIOR; PLACE PREFERENCE; COPULATORY-BEHAVIOR; EJACULATORY PREFERENCES; ESTROUS SYNCHRONY; PACED COPULATION; PRAIRIE VOLES; STIMULATION SO - Behavioral Neuroscience 2005 ;119(3):716-725 13528 UI - 620 AU - Corma A AU - Melo FV AU - Sauvanaud L AU - Ortega F AD - Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, SpainInst Mexicano Petr, Mexico City 77030, DF, MexicoCorma, A, Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Avenida De Los Naranjos S-N, Valencia 46022, Spain TI - Light cracked naphtha processing: Controlling chemistry for maximum propylene production AB - As propylene market is expanding, new production paths have to be found. The cracking of light olefins contained in several naphthas seems to be a good alternative for responding to this demand. Results of light FCC naphtha cracking have shown that selectivity towards propylene is governed by hydrogen-transfer reactions. Thus, the selectivity to propylene may be increased by minimizing these reactions. This can be achieved by cracking the naphtha at high temperature, by using shape-selective catalysts or by working with coked catalysts. Recycling light naphtha in the FCC process is an interesting alternative, which may increase the yield of propylene by 50% if proper processing is carried out. Furthermore, olefins content of FCC gasoline may be significantly reduced. (c) 2005 Elsevier B.V. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 1 U4 - Chemistry, Applied;Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0920-5861 UR - ISI:000233293600096 L2 - naphtha;cracking;propylene;olefin reduction;CATALYTIC CRACKING; CHAIN MECHANISM; KINETICS; ZEOLITE; ZSM-5; COKE SO - Catalysis Today 2005 ;107-08():699-706 13529 UI - 1661 AU - Corma A AU - Ortega FJ AD - Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, SpainInst Mexicano Petr, Mexico City 07730, DF, MexicoCorma, A, Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Avda Naranjos S-N, Valencia 46022, Spain TI - Influence of adsorption parameters on catalytic cracking and catalyst decay AB - Adsorption constants and heats of adsorption of different types of hydrocarbons on zeolitic catalysts have been obtained under cracking reaction conditions, by means of kinetic techniques. The heat of adsorption of a naplithene is very close to the alkane with the same number of carbon-carbon bonds, which in turn is defined by the van der Waals interactions between the hydrocarbon and the zeolite walls. The presence of the double bond in the olefin increases the heat of adsorption of the corresponding alkane by similar to 40 kJ/mol. Comparison of decalin and tetralin shows the contribution of the aromatic ring to the heat of adsorption. Differences in heat of adsorption not only explain differences in cracking conversion. but can also predict variations in catalyst decay when industrial feeds of different compositions are used. (c) 2005 Elsevier Inc. All rights reserved MH - Mexico|Distrito Federal MH - Spain PB - SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE RP - NOT IN FILE U3 - TC 3 U4 - Chemistry, Physical;Engineering, Chemical U5 - J;Article AV - English IS - 0021-9517 UR - ISI:000230768400001 L2 - catalytic cracking;kinetics;hydrocarbon adsorption;adsorption constants;adsorption heats;microactivity;ETHYLBENZENE DISPROPORTIONATION; HY ZEOLITE; SORPTION; DEACTIVATION; BEHAVIOR; H-ZSM-5; SIEVES; TIME SO - Journal of Catalysis 2005 ;233(2):257-265 13530 UI - 462 AU - Cornejo-Bravo JM AU - Flores-Guillen ME AU - Lugo-Medina E AU - Licea-Claverie A AD - Univ Autonoma Baja California, Fac Ciencias Quim & Ingn, San Diego, CA 92154, USACtr Grad Invest, Inst Tecnol Tijuana, Tijuana 22000, Baja California, MexicoCornejo-Bravo, JM, Univ Autonoma Baja California, Fac Ciencias Quim & Ingn, PMB 121,2498 Roll Dr, San Diego, CA 92154 USA TI - Drug release from complexes with a series of poly(carboxyalkyl methacrylates), a new class of weak polyelectrolytes AB - Carboxyalkyl methacrylates, a new class of non-cross-linked, hydrophobic weak polyelectrolytes, were synthesized, and then bound to cationic drugs (propranolol center dot HCl, diltiazem center dot HCl and verapamil center dot HCl) to form water-insoluble complexes that release the bound drug only in ionic media (pH 7.4). Compressed tablets were prepared from these cation exchange polyelectrolytes. Release profiles followed zero order kinetics (n > 0.90; n is the release exponent). As the hydrophobicity of the polyelectrolytes increased, the rate of release decreased and deviated from linearity (n = 0.7). Both the ionic strength of the medium as well as the solubility of the drug affected the rate of release. In acidic media (pH 1.2) a burst of drug was released but the release was halted by a layer of non-ionized polymer precipitated on the surface of the tablets. The results indicate that it is possible to "tailor-make" the release kinetics by using a polyelectrolyte from the series with the suitable hydrophobicity. (c) 2005 Elsevier B.V. All rights reserved MH - USA MH - Mexico|Baja California PB - AMSTERDAM: ELSEVIER SCIENCE BV RP - NOT IN FILE U3 - TC 3 U4 - Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0378-5173 UR - ISI:000233576000007 L2 - polyelectrolyte;hydrophobic;sustained drug release;methacrylates;ion exchange;ION-EXCHANGE RESINS; DELIVERY SYSTEM; COPOLYMERS; TABLETS; BINDING SO - International Journal of Pharmaceutics 2005 ;305(1-2):52-60 13531 UI - 429 AU - Cornelissen G AU - Delcourt A AU - Toussaint G AU - Otsuka K AU - Watanabe Y AU - Siegelova J AU - Fiser B AU - Dusek J AU - Homolka P AU - Singh RB AU - Kumar A AU - Singh RK AU - Sanchez S AU - Gonzalez C AU - Holley D AU - Sundaram B AU - Zhao Z AU - Tomlinson B AU - Fok B AU - Zeman M AU - Dulkova K AU - Halberg F AD - Univ Minnesota, Halberg Chronobiol Ctr, Minneapolis, MN 55455, USATokyo Womens Med Univ, Med Ctr E, Tokyo, JapanMasaryk Univ, Brno, Czech RepublicHalberg Hosp & Res Inst, Moradabad, IndiaGovt Med Coll, Amritsar, Punjab, IndiaKing Georges Med Univ, Lucknow, Uttar Pradesh, IndiaInst Politecn Nacl, Escuela Nacl Med & Homeopatma, Mexico City, DF, MexicoCtr Diabet AC, Mexico City, DF, MexicoSan Jose State Univ, San Jose, CA 95192, USAShandong Acad Med Sci, Jinan, Peoples R ChinaChinese Univ Hong Kong, Hong Kong, Hong Kong, Peoples R ChinaComenius Univ, Bratislava, SlovakiaCornelissen, G, Univ Minnesota, Halberg Chronobiol Ctr, MMC 8609,420 Delaware St SE, Minneapolis, MN 55455 USA TI - Opportunity of detecting pre-hypertension: worldwide data on blood pressure overswinging AB - Overswinging or CHAT (brief for Circadian Hyper-Amplitude-Tension). that is an excessive circadian variation in blood pressure (BP), has been associated with a large increase in cardiovascular disease risk, present even in the absence of an elevated BP itself. This usually asymptomatic condition is usually overlooked by current practice based on spot-checks. because to be diagnosed. measurements need to be taken around-the-clock, preferably for 7 days at the outset. Once diagnosed, however, a usual circadian BP pattern can be restored by means of certain non-pharmacologic or pharmacologic interventions timed appropriately. Thereby. it is possible to reduce the risk of cardiovascular morbidity and mortality, cerebral ischemic events and nephropathy in particular. For the preparation of guidelines regarding the diagnosis of BP disorders and for the institution of primary as well as secondary preventive measures, it is important to know what the incidence of CHAT is on a global basis. We found 191 cases of CHAT among 1602 mostly 7-day/24-h BP profiles. obtained from several centers in different countries participating in an ongoing project on the BIOsphere and the COSmos (BIOCOS). CHAT incidence is about the same between men and women. but it is diagnosed more often among patients with borderline hypertension or with glucose intolerance. It is also more common among MESOR-hypertensive than among MESOR-normotensive individuals. Priority should be given to the development of an unobtrusive and affordable device to automatically monitor BP and to analyze the data as-one-goes. so that cardiovascular disease risk can be prevented. (c) 2005 Elsevier SAS. All rights reserved MH - Czech Republic MH - India MH - Japan MH - Mexico|Distrito Federal MH - USA MH - Peoples R China MH - Slovakia PB - PARIS: ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER RP - NOT IN FILE U3 - TC 2 U4 - Medicine, Research & Experimental;Pharmacology & Pharmacy U5 - J;Article AV - English IS - 0753-3322 UR - ISI:000233804000023 L2 - BIOCOS;blood prcssure;chat (circadian hyper-amplitude-tension);glucose intolerance;pre-hypertension;worldwide incidence;HYPERTENSION; RISK SO - Biomedicine & Pharmacotherapy 2005 ;59():S152-S157 13532 UI - 939 AU - Corona-Chavez A AU - Gutierrez-Martinez C AU - Lancaster MJ AU - Torres-Fortiz A AD - Inst Nacl Astrofis Opt & Elect, Puebla 72840, MexicoUniv Birmingham, Dept Elect Engn, Birmingham B15 2TT, W Midlands, EnglandCorona-Chavez, A, Inst Nacl Astrofis Opt & Elect, Luis Enrique Erro 1, Puebla 72840, Mexico TI - Novel dual-mode ring resonators with very low sensitivity to substrate thickness AB - This paper presents the design of two filters at a center frequency of 1 GHz using a novel type of ring resonator. Their advantage over conventional microstrip ring resonators lies on their lower-frequency sensitivity to substrate thickness due to the addition of interdigital capacitors that concentrate the electric field near-the surface. (c) 2005 Wiley Periodicals, Inc MH - United Kingdom MH - Mexico|Puebla PB - HOBOKEN: JOHN WILEY & SONS INC RP - NOT IN FILE U3 - TC 1 U4 - Engineering, Electrical & Electronic;Optics U5 - J;Article AV - English IS - 0895-2477 UR - ISI:000232537400023 L2 - ring resonators;closed-loop resonators;microstrip resonators;dual-mode resonators;sensitivity to substrate thickness SO - Microwave and Optical Technology Letters 2005 ;47(4):381-384 13533 UI - 1011 AU - Corona-Org AU - Lopez-Cruz E AU - Vazquez-Lopez C AU - Morales JE AD - IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Mexico City 07360, DF, MexicoIPN, Ctr Invest Ciencia Aplicada Tecnol Avanzada, Unidad Puebla, Puebla, MexicoUniv Autonoma Puebla, Inst Fis, Puebla 72570, Pue, MexicoConcepcion Univ, Dept Fis, Concepcion, ChileVazquez-Lopez, C, IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo Postal Postal 14-740, Mexico City 07360, DF, Mexico TI - The interferometric mirage effect method: The determination of the thermal diffusivity of CdMnTe AB - A Michelson interferometer was used as a precise detector in the Mirage effect configuration in order to determine the thermal diffusivity of the diluted magnetic semiconductor Cd1-xMnxTe, in the concentration range 0